diff options
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/intel/Kconfig | 16 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/Makefile | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/igc/Makefile | 10 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/igc/igc.h | 443 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/igc/igc_base.c | 541 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/igc/igc_base.h | 107 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/igc/igc_defines.h | 389 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/igc/igc_hw.h | 321 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/igc/igc_i225.c | 490 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/igc/igc_i225.h | 13 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/igc/igc_mac.c | 806 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/igc/igc_mac.h | 41 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/igc/igc_main.c | 3901 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/igc/igc_nvm.c | 215 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/igc/igc_nvm.h | 14 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/igc/igc_phy.c | 791 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/igc/igc_phy.h | 21 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/igc/igc_regs.h | 221 |
18 files changed, 8341 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/Kconfig b/drivers/net/ethernet/intel/Kconfig index b542aba6f0e8..76f926d4bf13 100644 --- a/drivers/net/ethernet/intel/Kconfig +++ b/drivers/net/ethernet/intel/Kconfig @@ -287,4 +287,20 @@ config FM10K To compile this driver as a module, choose M here. The module will be called fm10k. MSI-X interrupt support is required +config IGC + tristate "Intel(R) Ethernet Controller I225-LM/I225-V support" + default n + depends on PCI + ---help--- + This driver supports Intel(R) Ethernet Controller I225-LM/I225-V + family of adapters. + + For more information on how to identify your adapter, go + to the Adapter & Driver ID Guide that can be located at: + + <http://support.intel.com> + + To compile this driver as a module, choose M here. The module + will be called igc. + endif # NET_VENDOR_INTEL diff --git a/drivers/net/ethernet/intel/Makefile b/drivers/net/ethernet/intel/Makefile index b91153df6ee8..3075290063f6 100644 --- a/drivers/net/ethernet/intel/Makefile +++ b/drivers/net/ethernet/intel/Makefile @@ -7,6 +7,7 @@ obj-$(CONFIG_E100) += e100.o obj-$(CONFIG_E1000) += e1000/ obj-$(CONFIG_E1000E) += e1000e/ obj-$(CONFIG_IGB) += igb/ +obj-$(CONFIG_IGC) += igc/ obj-$(CONFIG_IGBVF) += igbvf/ obj-$(CONFIG_IXGBE) += ixgbe/ obj-$(CONFIG_IXGBEVF) += ixgbevf/ diff --git a/drivers/net/ethernet/intel/igc/Makefile b/drivers/net/ethernet/intel/igc/Makefile new file mode 100644 index 000000000000..4387f6ba8e67 --- /dev/null +++ b/drivers/net/ethernet/intel/igc/Makefile @@ -0,0 +1,10 @@ +# SPDX-License-Identifier: GPL-2.0 +# Copyright (c) 2018 Intel Corporation + +# +# Intel(R) I225-LM/I225-V 2.5G Ethernet Controller +# + +obj-$(CONFIG_IGC) += igc.o + +igc-objs := igc_main.o igc_mac.o igc_i225.o igc_base.o igc_nvm.o igc_phy.o diff --git a/drivers/net/ethernet/intel/igc/igc.h b/drivers/net/ethernet/intel/igc/igc.h new file mode 100644 index 000000000000..cdf18a5d9e08 --- /dev/null +++ b/drivers/net/ethernet/intel/igc/igc.h @@ -0,0 +1,443 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2018 Intel Corporation */ + +#ifndef _IGC_H_ +#define _IGC_H_ + +#include <linux/kobject.h> + +#include <linux/pci.h> +#include <linux/netdevice.h> +#include <linux/vmalloc.h> + +#include <linux/ethtool.h> + +#include <linux/sctp.h> + +#define IGC_ERR(args...) pr_err("igc: " args) + +#define PFX "igc: " + +#include <linux/timecounter.h> +#include <linux/net_tstamp.h> +#include <linux/ptp_clock_kernel.h> + +#include "igc_hw.h" + +/* main */ +extern char igc_driver_name[]; +extern char igc_driver_version[]; + +/* Interrupt defines */ +#define IGC_START_ITR 648 /* ~6000 ints/sec */ +#define IGC_FLAG_HAS_MSI BIT(0) +#define IGC_FLAG_QUEUE_PAIRS BIT(4) +#define IGC_FLAG_NEED_LINK_UPDATE BIT(9) +#define IGC_FLAG_MEDIA_RESET BIT(10) +#define IGC_FLAG_MAS_ENABLE BIT(12) +#define IGC_FLAG_HAS_MSIX BIT(13) +#define IGC_FLAG_VLAN_PROMISC BIT(15) + +#define IGC_START_ITR 648 /* ~6000 ints/sec */ +#define IGC_4K_ITR 980 +#define IGC_20K_ITR 196 +#define IGC_70K_ITR 56 + +#define IGC_DEFAULT_ITR 3 /* dynamic */ +#define IGC_MAX_ITR_USECS 10000 +#define IGC_MIN_ITR_USECS 10 +#define NON_Q_VECTORS 1 +#define MAX_MSIX_ENTRIES 10 + +/* TX/RX descriptor defines */ +#define IGC_DEFAULT_TXD 256 +#define IGC_DEFAULT_TX_WORK 128 +#define IGC_MIN_TXD 80 +#define IGC_MAX_TXD 4096 + +#define IGC_DEFAULT_RXD 256 +#define IGC_MIN_RXD 80 +#define IGC_MAX_RXD 4096 + +/* Transmit and receive queues */ +#define IGC_MAX_RX_QUEUES 4 +#define IGC_MAX_TX_QUEUES 4 + +#define MAX_Q_VECTORS 8 +#define MAX_STD_JUMBO_FRAME_SIZE 9216 + +/* Supported Rx Buffer Sizes */ +#define IGC_RXBUFFER_256 256 +#define IGC_RXBUFFER_2048 2048 +#define IGC_RXBUFFER_3072 3072 + +#define IGC_RX_HDR_LEN IGC_RXBUFFER_256 + +/* RX and TX descriptor control thresholds. + * PTHRESH - MAC will consider prefetch if it has fewer than this number of + * descriptors available in its onboard memory. + * Setting this to 0 disables RX descriptor prefetch. + * HTHRESH - MAC will only prefetch if there are at least this many descriptors + * available in host memory. + * If PTHRESH is 0, this should also be 0. + * WTHRESH - RX descriptor writeback threshold - MAC will delay writing back + * descriptors until either it has this many to write back, or the + * ITR timer expires. + */ +#define IGC_RX_PTHRESH 8 +#define IGC_RX_HTHRESH 8 +#define IGC_TX_PTHRESH 8 +#define IGC_TX_HTHRESH 1 +#define IGC_RX_WTHRESH 4 +#define IGC_TX_WTHRESH 16 + +#define IGC_RX_DMA_ATTR \ + (DMA_ATTR_SKIP_CPU_SYNC | DMA_ATTR_WEAK_ORDERING) + +#define IGC_TS_HDR_LEN 16 + +#define IGC_SKB_PAD (NET_SKB_PAD + NET_IP_ALIGN) + +#if (PAGE_SIZE < 8192) +#define IGC_MAX_FRAME_BUILD_SKB \ + (SKB_WITH_OVERHEAD(IGC_RXBUFFER_2048) - IGC_SKB_PAD - IGC_TS_HDR_LEN) +#else +#define IGC_MAX_FRAME_BUILD_SKB (IGC_RXBUFFER_2048 - IGC_TS_HDR_LEN) +#endif + +/* How many Rx Buffers do we bundle into one write to the hardware ? */ +#define IGC_RX_BUFFER_WRITE 16 /* Must be power of 2 */ + +/* igc_test_staterr - tests bits within Rx descriptor status and error fields */ +static inline __le32 igc_test_staterr(union igc_adv_rx_desc *rx_desc, + const u32 stat_err_bits) +{ + return rx_desc->wb.upper.status_error & cpu_to_le32(stat_err_bits); +} + +enum igc_state_t { + __IGC_TESTING, + __IGC_RESETTING, + __IGC_DOWN, + __IGC_PTP_TX_IN_PROGRESS, +}; + +enum igc_tx_flags { + /* cmd_type flags */ + IGC_TX_FLAGS_VLAN = 0x01, + IGC_TX_FLAGS_TSO = 0x02, + IGC_TX_FLAGS_TSTAMP = 0x04, + + /* olinfo flags */ + IGC_TX_FLAGS_IPV4 = 0x10, + IGC_TX_FLAGS_CSUM = 0x20, +}; + +enum igc_boards { + board_base, +}; + +/* The largest size we can write to the descriptor is 65535. In order to + * maintain a power of two alignment we have to limit ourselves to 32K. + */ +#define IGC_MAX_TXD_PWR 15 +#define IGC_MAX_DATA_PER_TXD BIT(IGC_MAX_TXD_PWR) + +/* Tx Descriptors needed, worst case */ +#define TXD_USE_COUNT(S) DIV_ROUND_UP((S), IGC_MAX_DATA_PER_TXD) +#define DESC_NEEDED (MAX_SKB_FRAGS + 4) + +/* wrapper around a pointer to a socket buffer, + * so a DMA handle can be stored along with the buffer + */ +struct igc_tx_buffer { + union igc_adv_tx_desc *next_to_watch; + unsigned long time_stamp; + struct sk_buff *skb; + unsigned int bytecount; + u16 gso_segs; + __be16 protocol; + + DEFINE_DMA_UNMAP_ADDR(dma); + DEFINE_DMA_UNMAP_LEN(len); + u32 tx_flags; +}; + +struct igc_rx_buffer { + dma_addr_t dma; + struct page *page; +#if (BITS_PER_LONG > 32) || (PAGE_SIZE >= 65536) + __u32 page_offset; +#else + __u16 page_offset; +#endif + __u16 pagecnt_bias; +}; + +struct igc_tx_queue_stats { + u64 packets; + u64 bytes; + u64 restart_queue; + u64 restart_queue2; +}; + +struct igc_rx_queue_stats { + u64 packets; + u64 bytes; + u64 drops; + u64 csum_err; + u64 alloc_failed; +}; + +struct igc_rx_packet_stats { + u64 ipv4_packets; /* IPv4 headers processed */ + u64 ipv4e_packets; /* IPv4E headers with extensions processed */ + u64 ipv6_packets; /* IPv6 headers processed */ + u64 ipv6e_packets; /* IPv6E headers with extensions processed */ + u64 tcp_packets; /* TCP headers processed */ + u64 udp_packets; /* UDP headers processed */ + u64 sctp_packets; /* SCTP headers processed */ + u64 nfs_packets; /* NFS headers processe */ + u64 other_packets; +}; + +struct igc_ring_container { + struct igc_ring *ring; /* pointer to linked list of rings */ + unsigned int total_bytes; /* total bytes processed this int */ + unsigned int total_packets; /* total packets processed this int */ + u16 work_limit; /* total work allowed per interrupt */ + u8 count; /* total number of rings in vector */ + u8 itr; /* current ITR setting for ring */ +}; + +struct igc_ring { + struct igc_q_vector *q_vector; /* backlink to q_vector */ + struct net_device *netdev; /* back pointer to net_device */ + struct device *dev; /* device for dma mapping */ + union { /* array of buffer info structs */ + struct igc_tx_buffer *tx_buffer_info; + struct igc_rx_buffer *rx_buffer_info; + }; + void *desc; /* descriptor ring memory */ + unsigned long flags; /* ring specific flags */ + void __iomem *tail; /* pointer to ring tail register */ + dma_addr_t dma; /* phys address of the ring */ + unsigned int size; /* length of desc. ring in bytes */ + + u16 count; /* number of desc. in the ring */ + u8 queue_index; /* logical index of the ring*/ + u8 reg_idx; /* physical index of the ring */ + + /* everything past this point are written often */ + u16 next_to_clean; + u16 next_to_use; + u16 next_to_alloc; + + union { + /* TX */ + struct { + struct igc_tx_queue_stats tx_stats; + struct u64_stats_sync tx_syncp; + struct u64_stats_sync tx_syncp2; + }; + /* RX */ + struct { + struct igc_rx_queue_stats rx_stats; + struct igc_rx_packet_stats pkt_stats; + struct u64_stats_sync rx_syncp; + struct sk_buff *skb; + }; + }; +} ____cacheline_internodealigned_in_smp; + +struct igc_q_vector { + struct igc_adapter *adapter; /* backlink */ + void __iomem *itr_register; + u32 eims_value; /* EIMS mask value */ + + u16 itr_val; + u8 set_itr; + + struct igc_ring_container rx, tx; + + struct napi_struct napi; + + struct rcu_head rcu; /* to avoid race with update stats on free */ + char name[IFNAMSIZ + 9]; + struct net_device poll_dev; + + /* for dynamic allocation of rings associated with this q_vector */ + struct igc_ring ring[0] ____cacheline_internodealigned_in_smp; +}; + +struct igc_mac_addr { + u8 addr[ETH_ALEN]; + u8 queue; + u8 state; /* bitmask */ +}; + +#define IGC_MAC_STATE_DEFAULT 0x1 +#define IGC_MAC_STATE_MODIFIED 0x2 +#define IGC_MAC_STATE_IN_USE 0x4 + +/* Board specific private data structure */ +struct igc_adapter { + struct net_device *netdev; + + unsigned long state; + unsigned int flags; + unsigned int num_q_vectors; + + struct msix_entry *msix_entries; + + /* TX */ + u16 tx_work_limit; + u32 tx_timeout_count; + int num_tx_queues; + struct igc_ring *tx_ring[IGC_MAX_TX_QUEUES]; + + /* RX */ + int num_rx_queues; + struct igc_ring *rx_ring[IGC_MAX_RX_QUEUES]; + + struct timer_list watchdog_timer; + struct timer_list dma_err_timer; + struct timer_list phy_info_timer; + + u16 link_speed; + u16 link_duplex; + + u8 port_num; + + u8 __iomem *io_addr; + /* Interrupt Throttle Rate */ + u32 rx_itr_setting; + u32 tx_itr_setting; + + struct work_struct reset_task; + struct work_struct watchdog_task; + struct work_struct dma_err_task; + bool fc_autoneg; + + u8 tx_timeout_factor; + + int msg_enable; + u32 max_frame_size; + u32 min_frame_size; + + /* OS defined structs */ + struct pci_dev *pdev; + /* lock for statistics */ + spinlock_t stats64_lock; + struct rtnl_link_stats64 stats64; + + /* structs defined in igc_hw.h */ + struct igc_hw hw; + struct igc_hw_stats stats; + + struct igc_q_vector *q_vector[MAX_Q_VECTORS]; + u32 eims_enable_mask; + u32 eims_other; + + u16 tx_ring_count; + u16 rx_ring_count; + + u32 *shadow_vfta; + + u32 rss_queues; + + /* lock for RX network flow classification filter */ + spinlock_t nfc_lock; + + struct igc_mac_addr *mac_table; + + unsigned long link_check_timeout; + struct igc_info ei; +}; + +/* igc_desc_unused - calculate if we have unused descriptors */ +static inline u16 igc_desc_unused(const struct igc_ring *ring) +{ + u16 ntc = ring->next_to_clean; + u16 ntu = ring->next_to_use; + + return ((ntc > ntu) ? 0 : ring->count) + ntc - ntu - 1; +} + +static inline s32 igc_get_phy_info(struct igc_hw *hw) +{ + if (hw->phy.ops.get_phy_info) + return hw->phy.ops.get_phy_info(hw); + + return 0; +} + +static inline s32 igc_reset_phy(struct igc_hw *hw) +{ + if (hw->phy.ops.reset) + return hw->phy.ops.reset(hw); + + return 0; +} + +static inline struct netdev_queue *txring_txq(const struct igc_ring *tx_ring) +{ + return netdev_get_tx_queue(tx_ring->netdev, tx_ring->queue_index); +} + +enum igc_ring_flags_t { + IGC_RING_FLAG_RX_3K_BUFFER, + IGC_RING_FLAG_RX_BUILD_SKB_ENABLED, + IGC_RING_FLAG_RX_SCTP_CSUM, + IGC_RING_FLAG_RX_LB_VLAN_BSWAP, + IGC_RING_FLAG_TX_CTX_IDX, + IGC_RING_FLAG_TX_DETECT_HANG +}; + +#define ring_uses_large_buffer(ring) \ + test_bit(IGC_RING_FLAG_RX_3K_BUFFER, &(ring)->flags) + +#define ring_uses_build_skb(ring) \ + test_bit(IGC_RING_FLAG_RX_BUILD_SKB_ENABLED, &(ring)->flags) + +static inline unsigned int igc_rx_bufsz(struct igc_ring *ring) +{ +#if (PAGE_SIZE < 8192) + if (ring_uses_large_buffer(ring)) + return IGC_RXBUFFER_3072; + + if (ring_uses_build_skb(ring)) + return IGC_MAX_FRAME_BUILD_SKB + IGC_TS_HDR_LEN; +#endif + return IGC_RXBUFFER_2048; +} + +static inline unsigned int igc_rx_pg_order(struct igc_ring *ring) +{ +#if (PAGE_SIZE < 8192) + if (ring_uses_large_buffer(ring)) + return 1; +#endif + return 0; +} + +static inline s32 igc_read_phy_reg(struct igc_hw *hw, u32 offset, u16 *data) +{ + if (hw->phy.ops.read_reg) + return hw->phy.ops.read_reg(hw, offset, data); + + return 0; +} + +#define igc_rx_pg_size(_ring) (PAGE_SIZE << igc_rx_pg_order(_ring)) + +#define IGC_TXD_DCMD (IGC_ADVTXD_DCMD_EOP | IGC_ADVTXD_DCMD_RS) + +#define IGC_RX_DESC(R, i) \ + (&(((union igc_adv_rx_desc *)((R)->desc))[i])) +#define IGC_TX_DESC(R, i) \ + (&(((union igc_adv_tx_desc *)((R)->desc))[i])) +#define IGC_TX_CTXTDESC(R, i) \ + (&(((struct igc_adv_tx_context_desc *)((R)->desc))[i])) + +#endif /* _IGC_H_ */ diff --git a/drivers/net/ethernet/intel/igc/igc_base.c b/drivers/net/ethernet/intel/igc/igc_base.c new file mode 100644 index 000000000000..832da609d9a7 --- /dev/null +++ b/drivers/net/ethernet/intel/igc/igc_base.c @@ -0,0 +1,541 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2018 Intel Corporation */ + +#include <linux/delay.h> + +#include "igc_hw.h" +#include "igc_i225.h" +#include "igc_mac.h" +#include "igc_base.h" +#include "igc.h" + +/** + * igc_set_pcie_completion_timeout - set pci-e completion timeout + * @hw: pointer to the HW structure + */ +static s32 igc_set_pcie_completion_timeout(struct igc_hw *hw) +{ + u32 gcr = rd32(IGC_GCR); + u16 pcie_devctl2; + s32 ret_val = 0; + + /* only take action if timeout value is defaulted to 0 */ + if (gcr & IGC_GCR_CMPL_TMOUT_MASK) + goto out; + + /* if capabilities version is type 1 we can write the + * timeout of 10ms to 200ms through the GCR register + */ + if (!(gcr & IGC_GCR_CAP_VER2)) { + gcr |= IGC_GCR_CMPL_TMOUT_10ms; + goto out; + } + + /* for version 2 capabilities we need to write the config space + * directly in order to set the completion timeout value for + * 16ms to 55ms + */ + ret_val = igc_read_pcie_cap_reg(hw, PCIE_DEVICE_CONTROL2, + &pcie_devctl2); + if (ret_val) + goto out; + + pcie_devctl2 |= PCIE_DEVICE_CONTROL2_16ms; + + ret_val = igc_write_pcie_cap_reg(hw, PCIE_DEVICE_CONTROL2, + &pcie_devctl2); +out: + /* disable completion timeout resend */ + gcr &= ~IGC_GCR_CMPL_TMOUT_RESEND; + + wr32(IGC_GCR, gcr); + + return ret_val; +} + +/** + * igc_check_for_link_base - Check for link + * @hw: pointer to the HW structure + * + * If sgmii is enabled, then use the pcs register to determine link, otherwise + * use the generic interface for determining link. + */ +static s32 igc_check_for_link_base(struct igc_hw *hw) +{ + s32 ret_val = 0; + + ret_val = igc_check_for_copper_link(hw); + + return ret_val; +} + +/** + * igc_reset_hw_base - Reset hardware + * @hw: pointer to the HW structure + * + * This resets the hardware into a known state. This is a + * function pointer entry point called by the api module. + */ +static s32 igc_reset_hw_base(struct igc_hw *hw) +{ + s32 ret_val; + u32 ctrl; + + /* Prevent the PCI-E bus from sticking if there is no TLP connection + * on the last TLP read/write transaction when MAC is reset. + */ + ret_val = igc_disable_pcie_master(hw); + if (ret_val) + hw_dbg("PCI-E Master disable polling has failed.\n"); + + /* set the completion timeout for interface */ + ret_val = igc_set_pcie_completion_timeout(hw); + if (ret_val) + hw_dbg("PCI-E Set completion timeout has failed.\n"); + + hw_dbg("Masking off all interrupts\n"); + wr32(IGC_IMC, 0xffffffff); + + wr32(IGC_RCTL, 0); + wr32(IGC_TCTL, IGC_TCTL_PSP); + wrfl(); + + usleep_range(10000, 20000); + + ctrl = rd32(IGC_CTRL); + + hw_dbg("Issuing a global reset to MAC\n"); + wr32(IGC_CTRL, ctrl | IGC_CTRL_RST); + + ret_val = igc_get_auto_rd_done(hw); + if (ret_val) { + /* When auto config read does not complete, do not + * return with an error. This can happen in situations + * where there is no eeprom and prevents getting link. + */ + hw_dbg("Auto Read Done did not complete\n"); + } + + /* Clear any pending interrupt events. */ + wr32(IGC_IMC, 0xffffffff); + rd32(IGC_ICR); + + return ret_val; +} + +/** + * igc_get_phy_id_base - Retrieve PHY addr and id + * @hw: pointer to the HW structure + * + * Retrieves the PHY address and ID for both PHY's which do and do not use + * sgmi interface. + */ +static s32 igc_get_phy_id_base(struct igc_hw *hw) +{ + s32 ret_val = 0; + + ret_val = igc_get_phy_id(hw); + + return ret_val; +} + +/** + * igc_init_nvm_params_base - Init NVM func ptrs. + * @hw: pointer to the HW structure + */ +static s32 igc_init_nvm_params_base(struct igc_hw *hw) +{ + struct igc_nvm_info *nvm = &hw->nvm; + u32 eecd = rd32(IGC_EECD); + u16 size; + + size = (u16)((eecd & IGC_EECD_SIZE_EX_MASK) >> + IGC_EECD_SIZE_EX_SHIFT); + + /* Added to a constant, "size" becomes the left-shift value + * for setting word_size. + */ + size += NVM_WORD_SIZE_BASE_SHIFT; + + /* Just in case size is out of range, cap it to the largest + * EEPROM size supported + */ + if (size > 15) + size = 15; + + nvm->word_size = BIT(size); + nvm->opcode_bits = 8; + nvm->delay_usec = 1; + + nvm->page_size = eecd & IGC_EECD_ADDR_BITS ? 32 : 8; + nvm->address_bits = eecd & IGC_EECD_ADDR_BITS ? + 16 : 8; + + if (nvm->word_size == BIT(15)) + nvm->page_size = 128; + + return 0; +} + +/** + * igc_setup_copper_link_base - Configure copper link settings + * @hw: pointer to the HW structure + * + * Configures the link for auto-neg or forced speed and duplex. Then we check + * for link, once link is established calls to configure collision distance + * and flow control are called. + */ +static s32 igc_setup_copper_link_base(struct igc_hw *hw) +{ + s32 ret_val = 0; + u32 ctrl; + + ctrl = rd32(IGC_CTRL); + ctrl |= IGC_CTRL_SLU; + ctrl &= ~(IGC_CTRL_FRCSPD | IGC_CTRL_FRCDPX); + wr32(IGC_CTRL, ctrl); + + ret_val = igc_setup_copper_link(hw); + + return ret_val; +} + +/** + * igc_init_mac_params_base - Init MAC func ptrs. + * @hw: pointer to the HW structure + */ +static s32 igc_init_mac_params_base(struct igc_hw *hw) +{ + struct igc_dev_spec_base *dev_spec = &hw->dev_spec._base; + struct igc_mac_info *mac = &hw->mac; + + /* Set mta register count */ + mac->mta_reg_count = 128; + mac->rar_entry_count = IGC_RAR_ENTRIES; + + /* reset */ + mac->ops.reset_hw = igc_reset_hw_base; + + mac->ops.acquire_swfw_sync = igc_acquire_swfw_sync_i225; + mac->ops.release_swfw_sync = igc_release_swfw_sync_i225; + + /* Allow a single clear of the SW semaphore on I225 */ + if (mac->type == igc_i225) + dev_spec->clear_semaphore_once = true; + + /* physical interface link setup */ + mac->ops.setup_physical_interface = igc_setup_copper_link_base; + + return 0; +} + +/** + * igc_init_phy_params_base - Init PHY func ptrs. + * @hw: pointer to the HW structure + */ +static s32 igc_init_phy_params_base(struct igc_hw *hw) +{ + struct igc_phy_info *phy = &hw->phy; + s32 ret_val = 0; + u32 ctrl_ext; + + if (hw->phy.media_type != igc_media_type_copper) { + phy->type = igc_phy_none; + goto out; + } + + phy->autoneg_mask = AUTONEG_ADVERTISE_SPEED_DEFAULT_2500; + phy->reset_delay_us = 100; + + ctrl_ext = rd32(IGC_CTRL_EXT); + + /* set lan id */ + hw->bus.func = (rd32(IGC_STATUS) & IGC_STATUS_FUNC_MASK) >> + IGC_STATUS_FUNC_SHIFT; + + /* Make sure the PHY is in a good state. Several people have reported + * firmware leaving the PHY's page select register set to something + * other than the default of zero, which causes the PHY ID read to + * access something other than the intended register. + */ + ret_val = hw->phy.ops.reset(hw); + if (ret_val) { + hw_dbg("Error resetting the PHY.\n"); + goto out; + } + + ret_val = igc_get_phy_id_base(hw); + if (ret_val) + return ret_val; + + igc_check_for_link_base(hw); + + /* Verify phy id and set remaining function pointers */ + switch (phy->id) { + case I225_I_PHY_ID: + phy->type = igc_phy_i225; + break; + default: + ret_val = -IGC_ERR_PHY; + goto out; + } + +out: + return ret_val; +} + +static s32 igc_get_invariants_base(struct igc_hw *hw) +{ + struct igc_mac_info *mac = &hw->mac; + u32 link_mode = 0; + u32 ctrl_ext = 0; + s32 ret_val = 0; + + switch (hw->device_id) { + case IGC_DEV_ID_I225_LM: + case IGC_DEV_ID_I225_V: + mac->type = igc_i225; + break; + default: + return -IGC_ERR_MAC_INIT; + } + + hw->phy.media_type = igc_media_type_copper; + + ctrl_ext = rd32(IGC_CTRL_EXT); + link_mode = ctrl_ext & IGC_CTRL_EXT_LINK_MODE_MASK; + + /* mac initialization and operations */ + ret_val = igc_init_mac_params_base(hw); + if (ret_val) + goto out; + + /* NVM initialization */ + ret_val = igc_init_nvm_params_base(hw); + switch (hw->mac.type) { + case igc_i225: + ret_val = igc_init_nvm_params_i225(hw); + break; + default: + break; + } + + /* setup PHY parameters */ + ret_val = igc_init_phy_params_base(hw); + if (ret_val) + goto out; + +out: + return ret_val; +} + +/** + * igc_acquire_phy_base - Acquire rights to access PHY + * @hw: pointer to the HW structure + * + * Acquire access rights to the correct PHY. This is a + * function pointer entry point called by the api module. + */ +static s32 igc_acquire_phy_base(struct igc_hw *hw) +{ + u16 mask = IGC_SWFW_PHY0_SM; + + return hw->mac.ops.acquire_swfw_sync(hw, mask); +} + +/** + * igc_release_phy_base - Release rights to access PHY + * @hw: pointer to the HW structure + * + * A wrapper to release access rights to the correct PHY. This is a + * function pointer entry point called by the api module. + */ +static void igc_release_phy_base(struct igc_hw *hw) +{ + u16 mask = IGC_SWFW_PHY0_SM; + + hw->mac.ops.release_swfw_sync(hw, mask); +} + +/** + * igc_get_link_up_info_base - Get link speed/duplex info + * @hw: pointer to the HW structure + * @speed: stores the current speed + * @duplex: stores the current duplex + * + * This is a wrapper function, if using the serial gigabit media independent + * interface, use PCS to retrieve the link speed and duplex information. + * Otherwise, use the generic function to get the link speed and duplex info. + */ +static s32 igc_get_link_up_info_base(struct igc_hw *hw, u16 *speed, + u16 *duplex) +{ + s32 ret_val; + + ret_val = igc_get_speed_and_duplex_copper(hw, speed, duplex); + + return ret_val; +} + +/** + * igc_init_hw_base - Initialize hardware + * @hw: pointer to the HW structure + * + * This inits the hardware readying it for operation. + */ +static s32 igc_init_hw_base(struct igc_hw *hw) +{ + struct igc_mac_info *mac = &hw->mac; + u16 i, rar_count = mac->rar_entry_count; + s32 ret_val = 0; + + /* Setup the receive address */ + igc_init_rx_addrs(hw, rar_count); + + /* Zero out the Multicast HASH table */ + hw_dbg("Zeroing the MTA\n"); + for (i = 0; i < mac->mta_reg_count; i++) + array_wr32(IGC_MTA, i, 0); + + /* Zero out the Unicast HASH table */ + hw_dbg("Zeroing the UTA\n"); + for (i = 0; i < mac->uta_reg_count; i++) + array_wr32(IGC_UTA, i, 0); + + /* Setup link and flow control */ + ret_val = igc_setup_link(hw); + + /* Clear all of the statistics registers (clear on read). It is + * important that we do this after we have tried to establish link + * because the symbol error count will increment wildly if there + * is no link. + */ + igc_clear_hw_cntrs_base(hw); + + return ret_val; +} + +/** + * igc_read_mac_addr_base - Read device MAC address + * @hw: pointer to the HW structure + */ +static s32 igc_read_mac_addr_base(struct igc_hw *hw) +{ + s32 ret_val = 0; + + ret_val = igc_read_mac_addr(hw); + + return ret_val; +} + +/** + * igc_power_down_phy_copper_base - Remove link during PHY power down + * @hw: pointer to the HW structure + * + * In the case of a PHY power down to save power, or to turn off link during a + * driver unload, or wake on lan is not enabled, remove the link. + */ +void igc_power_down_phy_copper_base(struct igc_hw *hw) +{ + /* If the management interface is not enabled, then power down */ + if (!(igc_enable_mng_pass_thru(hw) || igc_check_reset_block(hw))) + igc_power_down_phy_copper(hw); +} + +/** + * igc_rx_fifo_flush_base - Clean rx fifo after Rx enable + * @hw: pointer to the HW structure + * + * After Rx enable, if manageability is enabled then there is likely some + * bad data at the start of the fifo and possibly in the DMA fifo. This + * function clears the fifos and flushes any packets that came in as rx was + * being enabled. + */ +void igc_rx_fifo_flush_base(struct igc_hw *hw) +{ + u32 rctl, rlpml, rxdctl[4], rfctl, temp_rctl, rx_enabled; + int i, ms_wait; + + /* disable IPv6 options as per hardware errata */ + rfctl = rd32(IGC_RFCTL); + rfctl |= IGC_RFCTL_IPV6_EX_DIS; + wr32(IGC_RFCTL, rfctl); + + if (!(rd32(IGC_MANC) & IGC_MANC_RCV_TCO_EN)) + return; + + /* Disable all Rx queues */ + for (i = 0; i < 4; i++) { + rxdctl[i] = rd32(IGC_RXDCTL(i)); + wr32(IGC_RXDCTL(i), + rxdctl[i] & ~IGC_RXDCTL_QUEUE_ENABLE); + } + /* Poll all queues to verify they have shut down */ + for (ms_wait = 0; ms_wait < 10; ms_wait++) { + usleep_range(1000, 2000); + rx_enabled = 0; + for (i = 0; i < 4; i++) + rx_enabled |= rd32(IGC_RXDCTL(i)); + if (!(rx_enabled & IGC_RXDCTL_QUEUE_ENABLE)) + break; + } + + if (ms_wait == 10) + pr_debug("Queue disable timed out after 10ms\n"); + + /* Clear RLPML, RCTL.SBP, RFCTL.LEF, and set RCTL.LPE so that all + * incoming packets are rejected. Set enable and wait 2ms so that + * any packet that was coming in as RCTL.EN was set is flushed + */ + wr32(IGC_RFCTL, rfctl & ~IGC_RFCTL_LEF); + + rlpml = rd32(IGC_RLPML); + wr32(IGC_RLPML, 0); + + rctl = rd32(IGC_RCTL); + temp_rctl = rctl & ~(IGC_RCTL_EN | IGC_RCTL_SBP); + temp_rctl |= IGC_RCTL_LPE; + + wr32(IGC_RCTL, temp_rctl); + wr32(IGC_RCTL, temp_rctl | IGC_RCTL_EN); + wrfl(); + usleep_range(2000, 3000); + + /* Enable Rx queues that were previously enabled and restore our + * previous state + */ + for (i = 0; i < 4; i++) + wr32(IGC_RXDCTL(i), rxdctl[i]); + wr32(IGC_RCTL, rctl); + wrfl(); + + wr32(IGC_RLPML, rlpml); + wr32(IGC_RFCTL, rfctl); + + /* Flush receive errors generated by workaround */ + rd32(IGC_ROC); + rd32(IGC_RNBC); + rd32(IGC_MPC); +} + +static struct igc_mac_operations igc_mac_ops_base = { + .init_hw = igc_init_hw_base, + .check_for_link = igc_check_for_link_base, + .rar_set = igc_rar_set, + .read_mac_addr = igc_read_mac_addr_base, + .get_speed_and_duplex = igc_get_link_up_info_base, +}; + +static const struct igc_phy_operations igc_phy_ops_base = { + .acquire = igc_acquire_phy_base, + .release = igc_release_phy_base, + .reset = igc_phy_hw_reset, + .read_reg = igc_read_phy_reg_gpy, + .write_reg = igc_write_phy_reg_gpy, +}; + +const struct igc_info igc_base_info = { + .get_invariants = igc_get_invariants_base, + .mac_ops = &igc_mac_ops_base, + .phy_ops = &igc_phy_ops_base, +}; diff --git a/drivers/net/ethernet/intel/igc/igc_base.h b/drivers/net/ethernet/intel/igc/igc_base.h new file mode 100644 index 000000000000..35588fa7b8c5 --- /dev/null +++ b/drivers/net/ethernet/intel/igc/igc_base.h @@ -0,0 +1,107 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2018 Intel Corporation */ + +#ifndef _IGC_BASE_H +#define _IGC_BASE_H + +/* forward declaration */ +void igc_rx_fifo_flush_base(struct igc_hw *hw); +void igc_power_down_phy_copper_base(struct igc_hw *hw); + +/* Transmit Descriptor - Advanced */ +union igc_adv_tx_desc { + struct { + __le64 buffer_addr; /* Address of descriptor's data buf */ + __le32 cmd_type_len; + __le32 olinfo_status; + } read; + struct { + __le64 rsvd; /* Reserved */ + __le32 nxtseq_seed; + __le32 status; + } wb; +}; + +/* Adv Transmit Descriptor Config Masks */ +#define IGC_ADVTXD_MAC_TSTAMP 0x00080000 /* IEEE1588 Timestamp packet */ +#define IGC_ADVTXD_DTYP_CTXT 0x00200000 /* Advanced Context Descriptor */ +#define IGC_ADVTXD_DTYP_DATA 0x00300000 /* Advanced Data Descriptor */ +#define IGC_ADVTXD_DCMD_EOP 0x01000000 /* End of Packet */ +#define IGC_ADVTXD_DCMD_IFCS 0x02000000 /* Insert FCS (Ethernet CRC) */ +#define IGC_ADVTXD_DCMD_RS 0x08000000 /* Report Status */ +#define IGC_ADVTXD_DCMD_DEXT 0x20000000 /* Descriptor extension (1=Adv) */ +#define IGC_ADVTXD_DCMD_VLE 0x40000000 /* VLAN pkt enable */ +#define IGC_ADVTXD_DCMD_TSE 0x80000000 /* TCP Seg enable */ +#define IGC_ADVTXD_PAYLEN_SHIFT 14 /* Adv desc PAYLEN shift */ + +#define IGC_RAR_ENTRIES 16 + +struct igc_adv_data_desc { + __le64 buffer_addr; /* Address of the descriptor's data buffer */ + union { + u32 data; + struct { + u32 datalen:16; /* Data buffer length */ + u32 rsvd:4; + u32 dtyp:4; /* Descriptor type */ + u32 dcmd:8; /* Descriptor command */ + } config; + } lower; + union { + u32 data; + struct { + u32 status:4; /* Descriptor status */ + u32 idx:4; + u32 popts:6; /* Packet Options */ + u32 paylen:18; /* Payload length */ + } options; + } upper; +}; + +/* Receive Descriptor - Advanced */ +union igc_adv_rx_desc { + struct { + __le64 pkt_addr; /* Packet buffer address */ + __le64 hdr_addr; /* Header buffer address */ + } read; + struct { + struct { + union { + __le32 data; + struct { + __le16 pkt_info; /*RSS type, Pkt type*/ + /* Split Header, header buffer len */ + __le16 hdr_info; + } hs_rss; + } lo_dword; + union { + __le32 rss; /* RSS Hash */ + struct { + __le16 ip_id; /* IP id */ + __le16 csum; /* Packet Checksum */ + } csum_ip; + } hi_dword; + } lower; + struct { + __le32 status_error; /* ext status/error */ + __le16 length; /* Packet length */ + __le16 vlan; /* VLAN tag */ + } upper; + } wb; /* writeback */ +}; + +/* Adv Transmit Descriptor Config Masks */ +#define IGC_ADVTXD_PAYLEN_SHIFT 14 /* Adv desc PAYLEN shift */ + +/* Additional Transmit Descriptor Control definitions */ +#define IGC_TXDCTL_QUEUE_ENABLE 0x02000000 /* Ena specific Tx Queue */ + +/* Additional Receive Descriptor Control definitions */ +#define IGC_RXDCTL_QUEUE_ENABLE 0x02000000 /* Ena specific Rx Queue */ + +/* SRRCTL bit definitions */ +#define IGC_SRRCTL_BSIZEPKT_SHIFT 10 /* Shift _right_ */ +#define IGC_SRRCTL_BSIZEHDRSIZE_SHIFT 2 /* Shift _left_ */ +#define IGC_SRRCTL_DESCTYPE_ADV_ONEBUF 0x02000000 + +#endif /* _IGC_BASE_H */ diff --git a/drivers/net/ethernet/intel/igc/igc_defines.h b/drivers/net/ethernet/intel/igc/igc_defines.h new file mode 100644 index 000000000000..8740754ea1fd --- /dev/null +++ b/drivers/net/ethernet/intel/igc/igc_defines.h @@ -0,0 +1,389 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2018 Intel Corporation */ + +#ifndef _IGC_DEFINES_H_ +#define _IGC_DEFINES_H_ + +#define IGC_CTRL_EXT_DRV_LOAD 0x10000000 /* Drv loaded bit for FW */ + +/* PCI Bus Info */ +#define PCIE_DEVICE_CONTROL2 0x28 +#define PCIE_DEVICE_CONTROL2_16ms 0x0005 + +/* Physical Func Reset Done Indication */ +#define IGC_CTRL_EXT_LINK_MODE_MASK 0x00C00000 + +/* Loop limit on how long we wait for auto-negotiation to complete */ +#define COPPER_LINK_UP_LIMIT 10 +#define PHY_AUTO_NEG_LIMIT 45 +#define PHY_FORCE_LIMIT 20 + +/* Number of 100 microseconds we wait for PCI Express master disable */ +#define MASTER_DISABLE_TIMEOUT 800 +/*Blocks new Master requests */ +#define IGC_CTRL_GIO_MASTER_DISABLE 0x00000004 +/* Status of Master requests. */ +#define IGC_STATUS_GIO_MASTER_ENABLE 0x00080000 + +/* PCI Express Control */ +#define IGC_GCR_CMPL_TMOUT_MASK 0x0000F000 +#define IGC_GCR_CMPL_TMOUT_10ms 0x00001000 +#define IGC_GCR_CMPL_TMOUT_RESEND 0x00010000 +#define IGC_GCR_CAP_VER2 0x00040000 + +/* Receive Address + * Number of high/low register pairs in the RAR. The RAR (Receive Address + * Registers) holds the directed and multicast addresses that we monitor. + * Technically, we have 16 spots. However, we reserve one of these spots + * (RAR[15]) for our directed address used by controllers with + * manageability enabled, allowing us room for 15 multicast addresses. + */ +#define IGC_RAH_AV 0x80000000 /* Receive descriptor valid */ +#define IGC_RAH_POOL_1 0x00040000 +#define IGC_RAL_MAC_ADDR_LEN 4 +#define IGC_RAH_MAC_ADDR_LEN 2 + +/* Error Codes */ +#define IGC_SUCCESS 0 +#define IGC_ERR_NVM 1 +#define IGC_ERR_PHY 2 +#define IGC_ERR_CONFIG 3 +#define IGC_ERR_PARAM 4 +#define IGC_ERR_MAC_INIT 5 +#define IGC_ERR_RESET 9 +#define IGC_ERR_MASTER_REQUESTS_PENDING 10 +#define IGC_ERR_BLK_PHY_RESET 12 +#define IGC_ERR_SWFW_SYNC 13 + +/* Device Control */ +#define IGC_CTRL_RST 0x04000000 /* Global reset */ + +#define IGC_CTRL_PHY_RST 0x80000000 /* PHY Reset */ +#define IGC_CTRL_SLU 0x00000040 /* Set link up (Force Link) */ +#define IGC_CTRL_FRCSPD 0x00000800 /* Force Speed */ +#define IGC_CTRL_FRCDPX 0x00001000 /* Force Duplex */ + +#define IGC_CTRL_RFCE 0x08000000 /* Receive Flow Control enable */ +#define IGC_CTRL_TFCE 0x10000000 /* Transmit flow control enable */ + +#define IGC_CONNSW_AUTOSENSE_EN 0x1 + +/* PBA constants */ +#define IGC_PBA_34K 0x0022 + +/* SW Semaphore Register */ +#define IGC_SWSM_SMBI 0x00000001 /* Driver Semaphore bit */ +#define IGC_SWSM_SWESMBI 0x00000002 /* FW Semaphore bit */ + +/* SWFW_SYNC Definitions */ +#define IGC_SWFW_EEP_SM 0x1 +#define IGC_SWFW_PHY0_SM 0x2 + +/* Autoneg Advertisement Register */ +#define NWAY_AR_10T_HD_CAPS 0x0020 /* 10T Half Duplex Capable */ +#define NWAY_AR_10T_FD_CAPS 0x0040 /* 10T Full Duplex Capable */ +#define NWAY_AR_100TX_HD_CAPS 0x0080 /* 100TX Half Duplex Capable */ +#define NWAY_AR_100TX_FD_CAPS 0x0100 /* 100TX Full Duplex Capable */ +#define NWAY_AR_PAUSE 0x0400 /* Pause operation desired */ +#define NWAY_AR_ASM_DIR 0x0800 /* Asymmetric Pause Direction bit */ + +/* Link Partner Ability Register (Base Page) */ +#define NWAY_LPAR_PAUSE 0x0400 /* LP Pause operation desired */ +#define NWAY_LPAR_ASM_DIR 0x0800 /* LP Asymmetric Pause Direction bit */ + +/* 1000BASE-T Control Register */ +#define CR_1000T_ASYM_PAUSE 0x0080 /* Advertise asymmetric pause bit */ +#define CR_1000T_HD_CAPS 0x0100 /* Advertise 1000T HD capability */ +#define CR_1000T_FD_CAPS 0x0200 /* Advertise 1000T FD capability */ + +/* 1000BASE-T Status Register */ +#define SR_1000T_REMOTE_RX_STATUS 0x1000 /* Remote receiver OK */ +#define SR_1000T_LOCAL_RX_STATUS 0x2000 /* Local receiver OK */ + +/* PHY GPY 211 registers */ +#define STANDARD_AN_REG_MASK 0x0007 /* MMD */ +#define ANEG_MULTIGBT_AN_CTRL 0x0020 /* MULTI GBT AN Control Register */ +#define MMD_DEVADDR_SHIFT 16 /* Shift MMD to higher bits */ +#define CR_2500T_FD_CAPS 0x0080 /* Advertise 2500T FD capability */ + +/* NVM Control */ +/* Number of milliseconds for NVM auto read done after MAC reset. */ +#define AUTO_READ_DONE_TIMEOUT 10 +#define IGC_EECD_AUTO_RD 0x00000200 /* NVM Auto Read done */ +#define IGC_EECD_REQ 0x00000040 /* NVM Access Request */ +#define IGC_EECD_GNT 0x00000080 /* NVM Access Grant */ +/* NVM Addressing bits based on type 0=small, 1=large */ +#define IGC_EECD_ADDR_BITS 0x00000400 +#define IGC_NVM_GRANT_ATTEMPTS 1000 /* NVM # attempts to gain grant */ +#define IGC_EECD_SIZE_EX_MASK 0x00007800 /* NVM Size */ +#define IGC_EECD_SIZE_EX_SHIFT 11 +#define IGC_EECD_FLUPD_I225 0x00800000 /* Update FLASH */ +#define IGC_EECD_FLUDONE_I225 0x04000000 /* Update FLASH done*/ +#define IGC_EECD_FLASH_DETECTED_I225 0x00080000 /* FLASH detected */ +#define IGC_FLUDONE_ATTEMPTS 20000 +#define IGC_EERD_EEWR_MAX_COUNT 512 /* buffered EEPROM words rw */ + +/* Offset to data in NVM read/write registers */ +#define IGC_NVM_RW_REG_DATA 16 +#define IGC_NVM_RW_REG_DONE 2 /* Offset to READ/WRITE done bit */ +#define IGC_NVM_RW_REG_START 1 /* Start operation */ +#define IGC_NVM_RW_ADDR_SHIFT 2 /* Shift to the address bits */ +#define IGC_NVM_POLL_READ 0 /* Flag for polling for read complete */ + +/* NVM Word Offsets */ +#define NVM_CHECKSUM_REG 0x003F + +/* For checksumming, the sum of all words in the NVM should equal 0xBABA. */ +#define NVM_SUM 0xBABA + +#define NVM_PBA_OFFSET_0 8 +#define NVM_PBA_OFFSET_1 9 +#define NVM_RESERVED_WORD 0xFFFF +#define NVM_PBA_PTR_GUARD 0xFAFA +#define NVM_WORD_SIZE_BASE_SHIFT 6 + +/* Collision related configuration parameters */ +#define IGC_COLLISION_THRESHOLD 15 +#define IGC_CT_SHIFT 4 +#define IGC_COLLISION_DISTANCE 63 +#define IGC_COLD_SHIFT 12 + +/* Device Status */ +#define IGC_STATUS_FD 0x00000001 /* Full duplex.0=half,1=full */ +#define IGC_STATUS_LU 0x00000002 /* Link up.0=no,1=link */ +#define IGC_STATUS_FUNC_MASK 0x0000000C /* PCI Function Mask */ +#define IGC_STATUS_FUNC_SHIFT 2 +#define IGC_STATUS_FUNC_1 0x00000004 /* Function 1 */ +#define IGC_STATUS_TXOFF 0x00000010 /* transmission paused */ +#define IGC_STATUS_SPEED_100 0x00000040 /* Speed 100Mb/s */ +#define IGC_STATUS_SPEED_1000 0x00000080 /* Speed 1000Mb/s */ +#define IGC_STATUS_SPEED_2500 0x00400000 /* Speed 2.5Gb/s */ + +#define SPEED_10 10 +#define SPEED_100 100 +#define SPEED_1000 1000 +#define SPEED_2500 2500 +#define HALF_DUPLEX 1 +#define FULL_DUPLEX 2 + +/* 1Gbps and 2.5Gbps half duplex is not supported, nor spec-compliant. */ +#define ADVERTISE_10_HALF 0x0001 +#define ADVERTISE_10_FULL 0x0002 +#define ADVERTISE_100_HALF 0x0004 +#define ADVERTISE_100_FULL 0x0008 +#define ADVERTISE_1000_HALF 0x0010 /* Not used, just FYI */ +#define ADVERTISE_1000_FULL 0x0020 +#define ADVERTISE_2500_HALF 0x0040 /* Not used, just FYI */ +#define ADVERTISE_2500_FULL 0x0080 + +#define IGC_ALL_SPEED_DUPLEX_2500 ( \ + ADVERTISE_10_HALF | ADVERTISE_10_FULL | ADVERTISE_100_HALF | \ + ADVERTISE_100_FULL | ADVERTISE_1000_FULL | ADVERTISE_2500_FULL) + +#define AUTONEG_ADVERTISE_SPEED_DEFAULT_2500 IGC_ALL_SPEED_DUPLEX_2500 + +/* Interrupt Cause Read */ +#define IGC_ICR_TXDW BIT(0) /* Transmit desc written back */ +#define IGC_ICR_TXQE BIT(1) /* Transmit Queue empty */ +#define IGC_ICR_LSC BIT(2) /* Link Status Change */ +#define IGC_ICR_RXSEQ BIT(3) /* Rx sequence error */ +#define IGC_ICR_RXDMT0 BIT(4) /* Rx desc min. threshold (0) */ +#define IGC_ICR_RXO BIT(6) /* Rx overrun */ +#define IGC_ICR_RXT0 BIT(7) /* Rx timer intr (ring 0) */ +#define IGC_ICR_DRSTA BIT(30) /* Device Reset Asserted */ + +/* If this bit asserted, the driver should claim the interrupt */ +#define IGC_ICR_INT_ASSERTED BIT(31) + +#define IGC_ICS_RXT0 IGC_ICR_RXT0 /* Rx timer intr */ + +#define IMS_ENABLE_MASK ( \ + IGC_IMS_RXT0 | \ + IGC_IMS_TXDW | \ + IGC_IMS_RXDMT0 | \ + IGC_IMS_RXSEQ | \ + IGC_IMS_LSC) + +/* Interrupt Mask Set */ +#define IGC_IMS_TXDW IGC_ICR_TXDW /* Tx desc written back */ +#define IGC_IMS_RXSEQ IGC_ICR_RXSEQ /* Rx sequence error */ +#define IGC_IMS_LSC IGC_ICR_LSC /* Link Status Change */ +#define IGC_IMS_DOUTSYNC IGC_ICR_DOUTSYNC /* NIC DMA out of sync */ +#define IGC_IMS_DRSTA IGC_ICR_DRSTA /* Device Reset Asserted */ +#define IGC_IMS_RXT0 IGC_ICR_RXT0 /* Rx timer intr */ +#define IGC_IMS_RXDMT0 IGC_ICR_RXDMT0 /* Rx desc min. threshold */ + +#define IGC_QVECTOR_MASK 0x7FFC /* Q-vector mask */ +#define IGC_ITR_VAL_MASK 0x04 /* ITR value mask */ + +/* Interrupt Cause Set */ +#define IGC_ICS_LSC IGC_ICR_LSC /* Link Status Change */ +#define IGC_ICS_RXDMT0 IGC_ICR_RXDMT0 /* rx desc min. threshold */ +#define IGC_ICS_DRSTA IGC_ICR_DRSTA /* Device Reset Aserted */ + +#define IGC_ICR_DOUTSYNC 0x10000000 /* NIC DMA out of sync */ +#define IGC_EITR_CNT_IGNR 0x80000000 /* Don't reset counters on write */ +#define IGC_IVAR_VALID 0x80 +#define IGC_GPIE_NSICR 0x00000001 +#define IGC_GPIE_MSIX_MODE 0x00000010 +#define IGC_GPIE_EIAME 0x40000000 +#define IGC_GPIE_PBA 0x80000000 + +/* Transmit Descriptor bit definitions */ +#define IGC_TXD_DTYP_D 0x00100000 /* Data Descriptor */ +#define IGC_TXD_DTYP_C 0x00000000 /* Context Descriptor */ +#define IGC_TXD_POPTS_IXSM 0x01 /* Insert IP checksum */ +#define IGC_TXD_POPTS_TXSM 0x02 /* Insert TCP/UDP checksum */ +#define IGC_TXD_CMD_EOP 0x01000000 /* End of Packet */ +#define IGC_TXD_CMD_IFCS 0x02000000 /* Insert FCS (Ethernet CRC) */ +#define IGC_TXD_CMD_IC 0x04000000 /* Insert Checksum */ +#define IGC_TXD_CMD_RS 0x08000000 /* Report Status */ +#define IGC_TXD_CMD_RPS 0x10000000 /* Report Packet Sent */ +#define IGC_TXD_CMD_DEXT 0x20000000 /* Desc extension (0 = legacy) */ +#define IGC_TXD_CMD_VLE 0x40000000 /* Add VLAN tag */ +#define IGC_TXD_CMD_IDE 0x80000000 /* Enable Tidv register */ +#define IGC_TXD_STAT_DD 0x00000001 /* Descriptor Done */ +#define IGC_TXD_STAT_EC 0x00000002 /* Excess Collisions */ +#define IGC_TXD_STAT_LC 0x00000004 /* Late Collisions */ +#define IGC_TXD_STAT_TU 0x00000008 /* Transmit underrun */ +#define IGC_TXD_CMD_TCP 0x01000000 /* TCP packet */ +#define IGC_TXD_CMD_IP 0x02000000 /* IP packet */ +#define IGC_TXD_CMD_TSE 0x04000000 /* TCP Seg enable */ +#define IGC_TXD_STAT_TC 0x00000004 /* Tx Underrun */ +#define IGC_TXD_EXTCMD_TSTAMP 0x00000010 /* IEEE1588 Timestamp packet */ + +/* Transmit Control */ +#define IGC_TCTL_EN 0x00000002 /* enable Tx */ +#define IGC_TCTL_PSP 0x00000008 /* pad short packets */ +#define IGC_TCTL_CT 0x00000ff0 /* collision threshold */ +#define IGC_TCTL_COLD 0x003ff000 /* collision distance */ +#define IGC_TCTL_RTLC 0x01000000 /* Re-transmit on late collision */ +#define IGC_TCTL_MULR 0x10000000 /* Multiple request support */ + +#define IGC_CT_SHIFT 4 +#define IGC_COLLISION_THRESHOLD 15 + +/* Flow Control Constants */ +#define FLOW_CONTROL_ADDRESS_LOW 0x00C28001 +#define FLOW_CONTROL_ADDRESS_HIGH 0x00000100 +#define FLOW_CONTROL_TYPE 0x8808 +/* Enable XON frame transmission */ +#define IGC_FCRTL_XONE 0x80000000 + +/* Management Control */ +#define IGC_MANC_RCV_TCO_EN 0x00020000 /* Receive TCO Packets Enabled */ +#define IGC_MANC_BLK_PHY_RST_ON_IDE 0x00040000 /* Block phy resets */ + +/* Receive Control */ +#define IGC_RCTL_RST 0x00000001 /* Software reset */ +#define IGC_RCTL_EN 0x00000002 /* enable */ +#define IGC_RCTL_SBP 0x00000004 /* store bad packet */ +#define IGC_RCTL_UPE 0x00000008 /* unicast promisc enable */ +#define IGC_RCTL_MPE 0x00000010 /* multicast promisc enable */ +#define IGC_RCTL_LPE 0x00000020 /* long packet enable */ +#define IGC_RCTL_LBM_MAC 0x00000040 /* MAC loopback mode */ +#define IGC_RCTL_LBM_TCVR 0x000000C0 /* tcvr loopback mode */ + +#define IGC_RCTL_RDMTS_HALF 0x00000000 /* Rx desc min thresh size */ +#define IGC_RCTL_BAM 0x00008000 /* broadcast enable */ + +/* Receive Descriptor bit definitions */ +#define IGC_RXD_STAT_EOP 0x02 /* End of Packet */ + +#define IGC_RXDEXT_STATERR_CE 0x01000000 +#define IGC_RXDEXT_STATERR_SE 0x02000000 +#define IGC_RXDEXT_STATERR_SEQ 0x04000000 +#define IGC_RXDEXT_STATERR_CXE 0x10000000 +#define IGC_RXDEXT_STATERR_TCPE 0x20000000 +#define IGC_RXDEXT_STATERR_IPE 0x40000000 +#define IGC_RXDEXT_STATERR_RXE 0x80000000 + +/* Same mask, but for extended and packet split descriptors */ +#define IGC_RXDEXT_ERR_FRAME_ERR_MASK ( \ + IGC_RXDEXT_STATERR_CE | \ + IGC_RXDEXT_STATERR_SE | \ + IGC_RXDEXT_STATERR_SEQ | \ + IGC_RXDEXT_STATERR_CXE | \ + IGC_RXDEXT_STATERR_RXE) + +/* Header split receive */ +#define IGC_RFCTL_IPV6_EX_DIS 0x00010000 +#define IGC_RFCTL_LEF 0x00040000 + +#define IGC_RCTL_SZ_256 0x00030000 /* Rx buffer size 256 */ + +#define IGC_RCTL_MO_SHIFT 12 /* multicast offset shift */ +#define IGC_RCTL_CFIEN 0x00080000 /* canonical form enable */ +#define IGC_RCTL_DPF 0x00400000 /* discard pause frames */ +#define IGC_RCTL_PMCF 0x00800000 /* pass MAC control frames */ +#define IGC_RCTL_SECRC 0x04000000 /* Strip Ethernet CRC */ + +#define I225_RXPBSIZE_DEFAULT 0x000000A2 /* RXPBSIZE default */ +#define I225_TXPBSIZE_DEFAULT 0x04000014 /* TXPBSIZE default */ + +/* GPY211 - I225 defines */ +#define GPY_MMD_MASK 0xFFFF0000 +#define GPY_MMD_SHIFT 16 +#define GPY_REG_MASK 0x0000FFFF + +#define IGC_MMDAC_FUNC_DATA 0x4000 /* Data, no post increment */ + +/* MAC definitions */ +#define IGC_FACTPS_MNGCG 0x20000000 +#define IGC_FWSM_MODE_MASK 0xE +#define IGC_FWSM_MODE_SHIFT 1 + +/* Management Control */ +#define IGC_MANC_SMBUS_EN 0x00000001 /* SMBus Enabled - RO */ +#define IGC_MANC_ASF_EN 0x00000002 /* ASF Enabled - RO */ + +/* PHY */ +#define PHY_REVISION_MASK 0xFFFFFFF0 +#define MAX_PHY_REG_ADDRESS 0x1F /* 5 bit address bus (0-0x1F) */ +#define IGC_GEN_POLL_TIMEOUT 1920 + +/* PHY Control Register */ +#define MII_CR_FULL_DUPLEX 0x0100 /* FDX =1, half duplex =0 */ +#define MII_CR_RESTART_AUTO_NEG 0x0200 /* Restart auto negotiation */ +#define MII_CR_POWER_DOWN 0x0800 /* Power down */ +#define MII_CR_AUTO_NEG_EN 0x1000 /* Auto Neg Enable */ +#define MII_CR_LOOPBACK 0x4000 /* 0 = normal, 1 = loopback */ +#define MII_CR_RESET 0x8000 /* 0 = normal, 1 = PHY reset */ +#define MII_CR_SPEED_1000 0x0040 +#define MII_CR_SPEED_100 0x2000 +#define MII_CR_SPEED_10 0x0000 + +/* PHY Status Register */ +#define MII_SR_LINK_STATUS 0x0004 /* Link Status 1 = link */ +#define MII_SR_AUTONEG_COMPLETE 0x0020 /* Auto Neg Complete */ + +/* PHY 1000 MII Register/Bit Definitions */ +/* PHY Registers defined by IEEE */ +#define PHY_CONTROL 0x00 /* Control Register */ +#define PHY_STATUS 0x01 /* Status Register */ +#define PHY_ID1 0x02 /* Phy Id Reg (word 1) */ +#define PHY_ID2 0x03 /* Phy Id Reg (word 2) */ +#define PHY_AUTONEG_ADV 0x04 /* Autoneg Advertisement */ +#define PHY_LP_ABILITY 0x05 /* Link Partner Ability (Base Page) */ +#define PHY_1000T_CTRL 0x09 /* 1000Base-T Control Reg */ +#define PHY_1000T_STATUS 0x0A /* 1000Base-T Status Reg */ + +/* Bit definitions for valid PHY IDs. I = Integrated E = External */ +#define I225_I_PHY_ID 0x67C9DC00 + +/* MDI Control */ +#define IGC_MDIC_DATA_MASK 0x0000FFFF +#define IGC_MDIC_REG_MASK 0x001F0000 +#define IGC_MDIC_REG_SHIFT 16 +#define IGC_MDIC_PHY_MASK 0x03E00000 +#define IGC_MDIC_PHY_SHIFT 21 +#define IGC_MDIC_OP_WRITE 0x04000000 +#define IGC_MDIC_OP_READ 0x08000000 +#define IGC_MDIC_READY 0x10000000 +#define IGC_MDIC_INT_EN 0x20000000 +#define IGC_MDIC_ERROR 0x40000000 +#define IGC_MDIC_DEST 0x80000000 + +#define IGC_N0_QUEUE -1 + +#endif /* _IGC_DEFINES_H_ */ diff --git a/drivers/net/ethernet/intel/igc/igc_hw.h b/drivers/net/ethernet/intel/igc/igc_hw.h new file mode 100644 index 000000000000..c50414f48f0d --- /dev/null +++ b/drivers/net/ethernet/intel/igc/igc_hw.h @@ -0,0 +1,321 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2018 Intel Corporation */ + +#ifndef _IGC_HW_H_ +#define _IGC_HW_H_ + +#include <linux/types.h> +#include <linux/if_ether.h> +#include <linux/netdevice.h> + +#include "igc_regs.h" +#include "igc_defines.h" +#include "igc_mac.h" +#include "igc_phy.h" +#include "igc_nvm.h" +#include "igc_i225.h" +#include "igc_base.h" + +#define IGC_DEV_ID_I225_LM 0x15F2 +#define IGC_DEV_ID_I225_V 0x15F3 + +#define IGC_FUNC_0 0 + +/* Function pointers for the MAC. */ +struct igc_mac_operations { + s32 (*check_for_link)(struct igc_hw *hw); + s32 (*reset_hw)(struct igc_hw *hw); + s32 (*init_hw)(struct igc_hw *hw); + s32 (*setup_physical_interface)(struct igc_hw *hw); + void (*rar_set)(struct igc_hw *hw, u8 *address, u32 index); + s32 (*read_mac_addr)(struct igc_hw *hw); + s32 (*get_speed_and_duplex)(struct igc_hw *hw, u16 *speed, + u16 *duplex); + s32 (*acquire_swfw_sync)(struct igc_hw *hw, u16 mask); + void (*release_swfw_sync)(struct igc_hw *hw, u16 mask); +}; + +enum igc_mac_type { + igc_undefined = 0, + igc_i225, + igc_num_macs /* List is 1-based, so subtract 1 for true count. */ +}; + +enum igc_phy_type { + igc_phy_unknown = 0, + igc_phy_none, + igc_phy_i225, +}; + +enum igc_media_type { + igc_media_type_unknown = 0, + igc_media_type_copper = 1, + igc_num_media_types +}; + +enum igc_nvm_type { + igc_nvm_unknown = 0, + igc_nvm_flash_hw, + igc_nvm_invm, +}; + +struct igc_info { + s32 (*get_invariants)(struct igc_hw *hw); + struct igc_mac_operations *mac_ops; + const struct igc_phy_operations *phy_ops; + struct igc_nvm_operations *nvm_ops; +}; + +extern const struct igc_info igc_base_info; + +struct igc_mac_info { + struct igc_mac_operations ops; + + u8 addr[ETH_ALEN]; + u8 perm_addr[ETH_ALEN]; + + enum igc_mac_type type; + + u32 collision_delta; + u32 ledctl_default; + u32 ledctl_mode1; + u32 ledctl_mode2; + u32 mc_filter_type; + u32 tx_packet_delta; + u32 txcw; + + u16 mta_reg_count; + u16 uta_reg_count; + + u16 rar_entry_count; + + u8 forced_speed_duplex; + + bool adaptive_ifs; + bool has_fwsm; + bool asf_firmware_present; + bool arc_subsystem_valid; + + bool autoneg; + bool autoneg_failed; + bool get_link_status; +}; + +struct igc_nvm_operations { + s32 (*acquire)(struct igc_hw *hw); + s32 (*read)(struct igc_hw *hw, u16 offset, u16 i, u16 *data); + void (*release)(struct igc_hw *hw); + s32 (*write)(struct igc_hw *hw, u16 offset, u16 i, u16 *data); + s32 (*update)(struct igc_hw *hw); + s32 (*validate)(struct igc_hw *hw); + s32 (*valid_led_default)(struct igc_hw *hw, u16 *data); +}; + +struct igc_phy_operations { + s32 (*acquire)(struct igc_hw *hw); + s32 (*check_polarity)(struct igc_hw *hw); + s32 (*check_reset_block)(struct igc_hw *hw); + s32 (*force_speed_duplex)(struct igc_hw *hw); + s32 (*get_cfg_done)(struct igc_hw *hw); + s32 (*get_cable_length)(struct igc_hw *hw); + s32 (*get_phy_info)(struct igc_hw *hw); + s32 (*read_reg)(struct igc_hw *hw, u32 address, u16 *data); + void (*release)(struct igc_hw *hw); + s32 (*reset)(struct igc_hw *hw); + s32 (*write_reg)(struct igc_hw *hw, u32 address, u16 data); +}; + +struct igc_nvm_info { + struct igc_nvm_operations ops; + enum igc_nvm_type type; + + u32 flash_bank_size; + u32 flash_base_addr; + + u16 word_size; + u16 delay_usec; + u16 address_bits; + u16 opcode_bits; + u16 page_size; +}; + +struct igc_phy_info { + struct igc_phy_operations ops; + + enum igc_phy_type type; + + u32 addr; + u32 id; + u32 reset_delay_us; /* in usec */ + u32 revision; + + enum igc_media_type media_type; + + u16 autoneg_advertised; + u16 autoneg_mask; + u16 cable_length; + u16 max_cable_length; + u16 min_cable_length; + u16 pair_length[4]; + + u8 mdix; + + bool disable_polarity_correction; + bool is_mdix; + bool polarity_correction; + bool reset_disable; + bool speed_downgraded; + bool autoneg_wait_to_complete; +}; + +struct igc_bus_info { + u16 func; + u16 pci_cmd_word; +}; + +enum igc_fc_mode { + igc_fc_none = 0, + igc_fc_rx_pause, + igc_fc_tx_pause, + igc_fc_full, + igc_fc_default = 0xFF +}; + +struct igc_fc_info { + u32 high_water; /* Flow control high-water mark */ + u32 low_water; /* Flow control low-water mark */ + u16 pause_time; /* Flow control pause timer */ + bool send_xon; /* Flow control send XON */ + bool strict_ieee; /* Strict IEEE mode */ + enum igc_fc_mode current_mode; /* Type of flow control */ + enum igc_fc_mode requested_mode; +}; + +struct igc_dev_spec_base { + bool global_device_reset; + bool eee_disable; + bool clear_semaphore_once; + bool module_plugged; + u8 media_port; + bool mas_capable; +}; + +struct igc_hw { + void *back; + + u8 __iomem *hw_addr; + unsigned long io_base; + + struct igc_mac_info mac; + struct igc_fc_info fc; + struct igc_nvm_info nvm; + struct igc_phy_info phy; + + struct igc_bus_info bus; + + union { + struct igc_dev_spec_base _base; + } dev_spec; + + u16 device_id; + u16 subsystem_vendor_id; + u16 subsystem_device_id; + u16 vendor_id; + + u8 revision_id; +}; + +/* Statistics counters collected by the MAC */ +struct igc_hw_stats { + u64 crcerrs; + u64 algnerrc; + u64 symerrs; + u64 rxerrc; + u64 mpc; + u64 scc; + u64 ecol; + u64 mcc; + u64 latecol; + u64 colc; + u64 dc; + u64 tncrs; + u64 sec; + u64 cexterr; + u64 rlec; + u64 xonrxc; + u64 xontxc; + u64 xoffrxc; + u64 xofftxc; + u64 fcruc; + u64 prc64; + u64 prc127; + u64 prc255; + u64 prc511; + u64 prc1023; + u64 prc1522; + u64 gprc; + u64 bprc; + u64 mprc; + u64 gptc; + u64 gorc; + u64 gotc; + u64 rnbc; + u64 ruc; + u64 rfc; + u64 roc; + u64 rjc; + u64 mgprc; + u64 mgpdc; + u64 mgptc; + u64 tor; + u64 tot; + u64 tpr; + u64 tpt; + u64 ptc64; + u64 ptc127; + u64 ptc255; + u64 ptc511; + u64 ptc1023; + u64 ptc1522; + u64 mptc; + u64 bptc; + u64 tsctc; + u64 tsctfc; + u64 iac; + u64 icrxptc; + u64 icrxatc; + u64 ictxptc; + u64 ictxatc; + u64 ictxqec; + u64 ictxqmtc; + u64 icrxdmtc; + u64 icrxoc; + u64 cbtmpc; + u64 htdpmc; + u64 cbrdpc; + u64 cbrmpc; + u64 rpthc; + u64 hgptc; + u64 htcbdpc; + u64 hgorc; + u64 hgotc; + u64 lenerrs; + u64 scvpc; + u64 hrmpc; + u64 doosync; + u64 o2bgptc; + u64 o2bspc; + u64 b2ospc; + u64 b2ogprc; +}; + +struct net_device *igc_get_hw_dev(struct igc_hw *hw); +#define hw_dbg(format, arg...) \ + netdev_dbg(igc_get_hw_dev(hw), format, ##arg) + +s32 igc_read_pcie_cap_reg(struct igc_hw *hw, u32 reg, u16 *value); +s32 igc_write_pcie_cap_reg(struct igc_hw *hw, u32 reg, u16 *value); +void igc_read_pci_cfg(struct igc_hw *hw, u32 reg, u16 *value); +void igc_write_pci_cfg(struct igc_hw *hw, u32 reg, u16 *value); + +#endif /* _IGC_HW_H_ */ diff --git a/drivers/net/ethernet/intel/igc/igc_i225.c b/drivers/net/ethernet/intel/igc/igc_i225.c new file mode 100644 index 000000000000..c25f555aaf82 --- /dev/null +++ b/drivers/net/ethernet/intel/igc/igc_i225.c @@ -0,0 +1,490 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2018 Intel Corporation */ + +#include <linux/delay.h> + +#include "igc_hw.h" + +/** + * igc_get_hw_semaphore_i225 - Acquire hardware semaphore + * @hw: pointer to the HW structure + * + * Acquire the necessary semaphores for exclusive access to the EEPROM. + * Set the EEPROM access request bit and wait for EEPROM access grant bit. + * Return successful if access grant bit set, else clear the request for + * EEPROM access and return -IGC_ERR_NVM (-1). + */ +static s32 igc_acquire_nvm_i225(struct igc_hw *hw) +{ + return igc_acquire_swfw_sync_i225(hw, IGC_SWFW_EEP_SM); +} + +/** + * igc_release_nvm_i225 - Release exclusive access to EEPROM + * @hw: pointer to the HW structure + * + * Stop any current commands to the EEPROM and clear the EEPROM request bit, + * then release the semaphores acquired. + */ +static void igc_release_nvm_i225(struct igc_hw *hw) +{ + igc_release_swfw_sync_i225(hw, IGC_SWFW_EEP_SM); +} + +/** + * igc_get_hw_semaphore_i225 - Acquire hardware semaphore + * @hw: pointer to the HW structure + * + * Acquire the HW semaphore to access the PHY or NVM + */ +static s32 igc_get_hw_semaphore_i225(struct igc_hw *hw) +{ + s32 timeout = hw->nvm.word_size + 1; + s32 i = 0; + u32 swsm; + + /* Get the SW semaphore */ + while (i < timeout) { + swsm = rd32(IGC_SWSM); + if (!(swsm & IGC_SWSM_SMBI)) + break; + + usleep_range(500, 600); + i++; + } + + if (i == timeout) { + /* In rare circumstances, the SW semaphore may already be held + * unintentionally. Clear the semaphore once before giving up. + */ + if (hw->dev_spec._base.clear_semaphore_once) { + hw->dev_spec._base.clear_semaphore_once = false; + igc_put_hw_semaphore(hw); + for (i = 0; i < timeout; i++) { + swsm = rd32(IGC_SWSM); + if (!(swsm & IGC_SWSM_SMBI)) + break; + + usleep_range(500, 600); + } + } + + /* If we do not have the semaphore here, we have to give up. */ + if (i == timeout) { + hw_dbg("Driver can't access device - SMBI bit is set.\n"); + return -IGC_ERR_NVM; + } + } + + /* Get the FW semaphore. */ + for (i = 0; i < timeout; i++) { + swsm = rd32(IGC_SWSM); + wr32(IGC_SWSM, swsm | IGC_SWSM_SWESMBI); + + /* Semaphore acquired if bit latched */ + if (rd32(IGC_SWSM) & IGC_SWSM_SWESMBI) + break; + + usleep_range(500, 600); + } + + if (i == timeout) { + /* Release semaphores */ + igc_put_hw_semaphore(hw); + hw_dbg("Driver can't access the NVM\n"); + return -IGC_ERR_NVM; + } + + return 0; +} + +/** + * igc_acquire_swfw_sync_i225 - Acquire SW/FW semaphore + * @hw: pointer to the HW structure + * @mask: specifies which semaphore to acquire + * + * Acquire the SW/FW semaphore to access the PHY or NVM. The mask + * will also specify which port we're acquiring the lock for. + */ +s32 igc_acquire_swfw_sync_i225(struct igc_hw *hw, u16 mask) +{ + s32 i = 0, timeout = 200; + u32 fwmask = mask << 16; + u32 swmask = mask; + s32 ret_val = 0; + u32 swfw_sync; + + while (i < timeout) { + if (igc_get_hw_semaphore_i225(hw)) { + ret_val = -IGC_ERR_SWFW_SYNC; + goto out; + } + + swfw_sync = rd32(IGC_SW_FW_SYNC); + if (!(swfw_sync & (fwmask | swmask))) + break; + + /* Firmware currently using resource (fwmask) */ + igc_put_hw_semaphore(hw); + mdelay(5); + i++; + } + + if (i == timeout) { + hw_dbg("Driver can't access resource, SW_FW_SYNC timeout.\n"); + ret_val = -IGC_ERR_SWFW_SYNC; + goto out; + } + + swfw_sync |= swmask; + wr32(IGC_SW_FW_SYNC, swfw_sync); + + igc_put_hw_semaphore(hw); +out: + return ret_val; +} + +/** + * igc_release_swfw_sync_i225 - Release SW/FW semaphore + * @hw: pointer to the HW structure + * @mask: specifies which semaphore to acquire + * + * Release the SW/FW semaphore used to access the PHY or NVM. The mask + * will also specify which port we're releasing the lock for. + */ +void igc_release_swfw_sync_i225(struct igc_hw *hw, u16 mask) +{ + u32 swfw_sync; + + while (igc_get_hw_semaphore_i225(hw)) + ; /* Empty */ + + swfw_sync = rd32(IGC_SW_FW_SYNC); + swfw_sync &= ~mask; + wr32(IGC_SW_FW_SYNC, swfw_sync); + + igc_put_hw_semaphore(hw); +} + +/** + * igc_read_nvm_srrd_i225 - Reads Shadow Ram using EERD register + * @hw: pointer to the HW structure + * @offset: offset of word in the Shadow Ram to read + * @words: number of words to read + * @data: word read from the Shadow Ram + * + * Reads a 16 bit word from the Shadow Ram using the EERD register. + * Uses necessary synchronization semaphores. + */ +static s32 igc_read_nvm_srrd_i225(struct igc_hw *hw, u16 offset, u16 words, + u16 *data) +{ + s32 status = 0; + u16 i, count; + + /* We cannot hold synchronization semaphores for too long, + * because of forceful takeover procedure. However it is more efficient + * to read in bursts than synchronizing access for each word. + */ + for (i = 0; i < words; i += IGC_EERD_EEWR_MAX_COUNT) { + count = (words - i) / IGC_EERD_EEWR_MAX_COUNT > 0 ? + IGC_EERD_EEWR_MAX_COUNT : (words - i); + + status = hw->nvm.ops.acquire(hw); + if (status) + break; + + status = igc_read_nvm_eerd(hw, offset, count, data + i); + hw->nvm.ops.release(hw); + if (status) + break; + } + + return status; +} + +/** + * igc_write_nvm_srwr - Write to Shadow Ram using EEWR + * @hw: pointer to the HW structure + * @offset: offset within the Shadow Ram to be written to + * @words: number of words to write + * @data: 16 bit word(s) to be written to the Shadow Ram + * + * Writes data to Shadow Ram at offset using EEWR register. + * + * If igc_update_nvm_checksum is not called after this function , the + * Shadow Ram will most likely contain an invalid checksum. + */ +static s32 igc_write_nvm_srwr(struct igc_hw *hw, u16 offset, u16 words, + u16 *data) +{ + struct igc_nvm_info *nvm = &hw->nvm; + u32 attempts = 100000; + u32 i, k, eewr = 0; + s32 ret_val = 0; + + /* A check for invalid values: offset too large, too many words, + * too many words for the offset, and not enough words. + */ + if (offset >= nvm->word_size || (words > (nvm->word_size - offset)) || + words == 0) { + hw_dbg("nvm parameter(s) out of bounds\n"); + ret_val = -IGC_ERR_NVM; + goto out; + } + + for (i = 0; i < words; i++) { + eewr = ((offset + i) << IGC_NVM_RW_ADDR_SHIFT) | + (data[i] << IGC_NVM_RW_REG_DATA) | + IGC_NVM_RW_REG_START; + + wr32(IGC_SRWR, eewr); + + for (k = 0; k < attempts; k++) { + if (IGC_NVM_RW_REG_DONE & + rd32(IGC_SRWR)) { + ret_val = 0; + break; + } + udelay(5); + } + + if (ret_val) { + hw_dbg("Shadow RAM write EEWR timed out\n"); + break; + } + } + +out: + return ret_val; +} + +/** + * igc_write_nvm_srwr_i225 - Write to Shadow RAM using EEWR + * @hw: pointer to the HW structure + * @offset: offset within the Shadow RAM to be written to + * @words: number of words to write + * @data: 16 bit word(s) to be written to the Shadow RAM + * + * Writes data to Shadow RAM at offset using EEWR register. + * + * If igc_update_nvm_checksum is not called after this function , the + * data will not be committed to FLASH and also Shadow RAM will most likely + * contain an invalid checksum. + * + * If error code is returned, data and Shadow RAM may be inconsistent - buffer + * partially written. + */ +static s32 igc_write_nvm_srwr_i225(struct igc_hw *hw, u16 offset, u16 words, + u16 *data) +{ + s32 status = 0; + u16 i, count; + + /* We cannot hold synchronization semaphores for too long, + * because of forceful takeover procedure. However it is more efficient + * to write in bursts than synchronizing access for each word. + */ + for (i = 0; i < words; i += IGC_EERD_EEWR_MAX_COUNT) { + count = (words - i) / IGC_EERD_EEWR_MAX_COUNT > 0 ? + IGC_EERD_EEWR_MAX_COUNT : (words - i); + + status = hw->nvm.ops.acquire(hw); + if (status) + break; + + status = igc_write_nvm_srwr(hw, offset, count, data + i); + hw->nvm.ops.release(hw); + if (status) + break; + } + + return status; +} + +/** + * igc_validate_nvm_checksum_i225 - Validate EEPROM checksum + * @hw: pointer to the HW structure + * + * Calculates the EEPROM checksum by reading/adding each word of the EEPROM + * and then verifies that the sum of the EEPROM is equal to 0xBABA. + */ +static s32 igc_validate_nvm_checksum_i225(struct igc_hw *hw) +{ + s32 (*read_op_ptr)(struct igc_hw *hw, u16 offset, u16 count, + u16 *data); + s32 status = 0; + + status = hw->nvm.ops.acquire(hw); + if (status) + goto out; + + /* Replace the read function with semaphore grabbing with + * the one that skips this for a while. + * We have semaphore taken already here. + */ + read_op_ptr = hw->nvm.ops.read; + hw->nvm.ops.read = igc_read_nvm_eerd; + + status = igc_validate_nvm_checksum(hw); + + /* Revert original read operation. */ + hw->nvm.ops.read = read_op_ptr; + + hw->nvm.ops.release(hw); + +out: + return status; +} + +/** + * igc_pool_flash_update_done_i225 - Pool FLUDONE status + * @hw: pointer to the HW structure + */ +static s32 igc_pool_flash_update_done_i225(struct igc_hw *hw) +{ + s32 ret_val = -IGC_ERR_NVM; + u32 i, reg; + + for (i = 0; i < IGC_FLUDONE_ATTEMPTS; i++) { + reg = rd32(IGC_EECD); + if (reg & IGC_EECD_FLUDONE_I225) { + ret_val = 0; + break; + } + udelay(5); + } + + return ret_val; +} + +/** + * igc_update_flash_i225 - Commit EEPROM to the flash + * @hw: pointer to the HW structure + */ +static s32 igc_update_flash_i225(struct igc_hw *hw) +{ + s32 ret_val = 0; + u32 flup; + + ret_val = igc_pool_flash_update_done_i225(hw); + if (ret_val == -IGC_ERR_NVM) { + hw_dbg("Flash update time out\n"); + goto out; + } + + flup = rd32(IGC_EECD) | IGC_EECD_FLUPD_I225; + wr32(IGC_EECD, flup); + + ret_val = igc_pool_flash_update_done_i225(hw); + if (ret_val) + hw_dbg("Flash update time out\n"); + else + hw_dbg("Flash update complete\n"); + +out: + return ret_val; +} + +/** + * igc_update_nvm_checksum_i225 - Update EEPROM checksum + * @hw: pointer to the HW structure + * + * Updates the EEPROM checksum by reading/adding each word of the EEPROM + * up to the checksum. Then calculates the EEPROM checksum and writes the + * value to the EEPROM. Next commit EEPROM data onto the Flash. + */ +static s32 igc_update_nvm_checksum_i225(struct igc_hw *hw) +{ + u16 checksum = 0; + s32 ret_val = 0; + u16 i, nvm_data; + + /* Read the first word from the EEPROM. If this times out or fails, do + * not continue or we could be in for a very long wait while every + * EEPROM read fails + */ + ret_val = igc_read_nvm_eerd(hw, 0, 1, &nvm_data); + if (ret_val) { + hw_dbg("EEPROM read failed\n"); + goto out; + } + + ret_val = hw->nvm.ops.acquire(hw); + if (ret_val) + goto out; + + /* Do not use hw->nvm.ops.write, hw->nvm.ops.read + * because we do not want to take the synchronization + * semaphores twice here. + */ + + for (i = 0; i < NVM_CHECKSUM_REG; i++) { + ret_val = igc_read_nvm_eerd(hw, i, 1, &nvm_data); + if (ret_val) { + hw->nvm.ops.release(hw); + hw_dbg("NVM Read Error while updating checksum.\n"); + goto out; + } + checksum += nvm_data; + } + checksum = (u16)NVM_SUM - checksum; + ret_val = igc_write_nvm_srwr(hw, NVM_CHECKSUM_REG, 1, + &checksum); + if (ret_val) { + hw->nvm.ops.release(hw); + hw_dbg("NVM Write Error while updating checksum.\n"); + goto out; + } + + hw->nvm.ops.release(hw); + + ret_val = igc_update_flash_i225(hw); + +out: + return ret_val; +} + +/** + * igc_get_flash_presence_i225 - Check if flash device is detected + * @hw: pointer to the HW structure + */ +bool igc_get_flash_presence_i225(struct igc_hw *hw) +{ + bool ret_val = false; + u32 eec = 0; + + eec = rd32(IGC_EECD); + if (eec & IGC_EECD_FLASH_DETECTED_I225) + ret_val = true; + + return ret_val; +} + +/** + * igc_init_nvm_params_i225 - Init NVM func ptrs. + * @hw: pointer to the HW structure + */ +s32 igc_init_nvm_params_i225(struct igc_hw *hw) +{ + struct igc_nvm_info *nvm = &hw->nvm; + + nvm->ops.acquire = igc_acquire_nvm_i225; + nvm->ops.release = igc_release_nvm_i225; + + /* NVM Function Pointers */ + if (igc_get_flash_presence_i225(hw)) { + hw->nvm.type = igc_nvm_flash_hw; + nvm->ops.read = igc_read_nvm_srrd_i225; + nvm->ops.write = igc_write_nvm_srwr_i225; + nvm->ops.validate = igc_validate_nvm_checksum_i225; + nvm->ops.update = igc_update_nvm_checksum_i225; + } else { + hw->nvm.type = igc_nvm_invm; + nvm->ops.read = igc_read_nvm_eerd; + nvm->ops.write = NULL; + nvm->ops.validate = NULL; + nvm->ops.update = NULL; + } + return 0; +} diff --git a/drivers/net/ethernet/intel/igc/igc_i225.h b/drivers/net/ethernet/intel/igc/igc_i225.h new file mode 100644 index 000000000000..7b66e1f9c0e6 --- /dev/null +++ b/drivers/net/ethernet/intel/igc/igc_i225.h @@ -0,0 +1,13 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2018 Intel Corporation */ + +#ifndef _IGC_I225_H_ +#define _IGC_I225_H_ + +s32 igc_acquire_swfw_sync_i225(struct igc_hw *hw, u16 mask); +void igc_release_swfw_sync_i225(struct igc_hw *hw, u16 mask); + +s32 igc_init_nvm_params_i225(struct igc_hw *hw); +bool igc_get_flash_presence_i225(struct igc_hw *hw); + +#endif diff --git a/drivers/net/ethernet/intel/igc/igc_mac.c b/drivers/net/ethernet/intel/igc/igc_mac.c new file mode 100644 index 000000000000..f7683d3ae47c --- /dev/null +++ b/drivers/net/ethernet/intel/igc/igc_mac.c @@ -0,0 +1,806 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2018 Intel Corporation */ + +#include <linux/pci.h> +#include <linux/delay.h> + +#include "igc_mac.h" +#include "igc_hw.h" + +/* forward declaration */ +static s32 igc_set_default_fc(struct igc_hw *hw); +static s32 igc_set_fc_watermarks(struct igc_hw *hw); + +/** + * igc_disable_pcie_master - Disables PCI-express master access + * @hw: pointer to the HW structure + * + * Returns 0 (0) if successful, else returns -10 + * (-IGC_ERR_MASTER_REQUESTS_PENDING) if master disable bit has not caused + * the master requests to be disabled. + * + * Disables PCI-Express master access and verifies there are no pending + * requests. + */ +s32 igc_disable_pcie_master(struct igc_hw *hw) +{ + s32 timeout = MASTER_DISABLE_TIMEOUT; + s32 ret_val = 0; + u32 ctrl; + + ctrl = rd32(IGC_CTRL); + ctrl |= IGC_CTRL_GIO_MASTER_DISABLE; + wr32(IGC_CTRL, ctrl); + + while (timeout) { + if (!(rd32(IGC_STATUS) & + IGC_STATUS_GIO_MASTER_ENABLE)) + break; + usleep_range(2000, 3000); + timeout--; + } + + if (!timeout) { + hw_dbg("Master requests are pending.\n"); + ret_val = -IGC_ERR_MASTER_REQUESTS_PENDING; + goto out; + } + +out: + return ret_val; +} + +/** + * igc_init_rx_addrs - Initialize receive addresses + * @hw: pointer to the HW structure + * @rar_count: receive address registers + * + * Setup the receive address registers by setting the base receive address + * register to the devices MAC address and clearing all the other receive + * address registers to 0. + */ +void igc_init_rx_addrs(struct igc_hw *hw, u16 rar_count) +{ + u8 mac_addr[ETH_ALEN] = {0}; + u32 i; + + /* Setup the receive address */ + hw_dbg("Programming MAC Address into RAR[0]\n"); + + hw->mac.ops.rar_set(hw, hw->mac.addr, 0); + + /* Zero out the other (rar_entry_count - 1) receive addresses */ + hw_dbg("Clearing RAR[1-%u]\n", rar_count - 1); + for (i = 1; i < rar_count; i++) + hw->mac.ops.rar_set(hw, mac_addr, i); +} + +/** + * igc_setup_link - Setup flow control and link settings + * @hw: pointer to the HW structure + * + * Determines which flow control settings to use, then configures flow + * control. Calls the appropriate media-specific link configuration + * function. Assuming the adapter has a valid link partner, a valid link + * should be established. Assumes the hardware has previously been reset + * and the transmitter and receiver are not enabled. + */ +s32 igc_setup_link(struct igc_hw *hw) +{ + s32 ret_val = 0; + + /* In the case of the phy reset being blocked, we already have a link. + * We do not need to set it up again. + */ + if (igc_check_reset_block(hw)) + goto out; + + /* If requested flow control is set to default, set flow control + * based on the EEPROM flow control settings. + */ + if (hw->fc.requested_mode == igc_fc_default) { + ret_val = igc_set_default_fc(hw); + if (ret_val) + goto out; + } + + /* We want to save off the original Flow Control configuration just + * in case we get disconnected and then reconnected into a different + * hub or switch with different Flow Control capabilities. + */ + hw->fc.current_mode = hw->fc.requested_mode; + + hw_dbg("After fix-ups FlowControl is now = %x\n", hw->fc.current_mode); + + /* Call the necessary media_type subroutine to configure the link. */ + ret_val = hw->mac.ops.setup_physical_interface(hw); + if (ret_val) + goto out; + + /* Initialize the flow control address, type, and PAUSE timer + * registers to their default values. This is done even if flow + * control is disabled, because it does not hurt anything to + * initialize these registers. + */ + hw_dbg("Initializing the Flow Control address, type and timer regs\n"); + wr32(IGC_FCT, FLOW_CONTROL_TYPE); + wr32(IGC_FCAH, FLOW_CONTROL_ADDRESS_HIGH); + wr32(IGC_FCAL, FLOW_CONTROL_ADDRESS_LOW); + + wr32(IGC_FCTTV, hw->fc.pause_time); + + ret_val = igc_set_fc_watermarks(hw); + +out: + return ret_val; +} + +/** + * igc_set_default_fc - Set flow control default values + * @hw: pointer to the HW structure + * + * Read the EEPROM for the default values for flow control and store the + * values. + */ +static s32 igc_set_default_fc(struct igc_hw *hw) +{ + hw->fc.requested_mode = igc_fc_full; + return 0; +} + +/** + * igc_force_mac_fc - Force the MAC's flow control settings + * @hw: pointer to the HW structure + * + * Force the MAC's flow control settings. Sets the TFCE and RFCE bits in the + * device control register to reflect the adapter settings. TFCE and RFCE + * need to be explicitly set by software when a copper PHY is used because + * autonegotiation is managed by the PHY rather than the MAC. Software must + * also configure these bits when link is forced on a fiber connection. + */ +s32 igc_force_mac_fc(struct igc_hw *hw) +{ + s32 ret_val = 0; + u32 ctrl; + + ctrl = rd32(IGC_CTRL); + + /* Because we didn't get link via the internal auto-negotiation + * mechanism (we either forced link or we got link via PHY + * auto-neg), we have to manually enable/disable transmit an + * receive flow control. + * + * The "Case" statement below enables/disable flow control + * according to the "hw->fc.current_mode" parameter. + * + * The possible values of the "fc" parameter are: + * 0: Flow control is completely disabled + * 1: Rx flow control is enabled (we can receive pause + * frames but not send pause frames). + * 2: Tx flow control is enabled (we can send pause frames + * frames but we do not receive pause frames). + * 3: Both Rx and TX flow control (symmetric) is enabled. + * other: No other values should be possible at this point. + */ + hw_dbg("hw->fc.current_mode = %u\n", hw->fc.current_mode); + + switch (hw->fc.current_mode) { + case igc_fc_none: + ctrl &= (~(IGC_CTRL_TFCE | IGC_CTRL_RFCE)); + break; + case igc_fc_rx_pause: + ctrl &= (~IGC_CTRL_TFCE); + ctrl |= IGC_CTRL_RFCE; + break; + case igc_fc_tx_pause: + ctrl &= (~IGC_CTRL_RFCE); + ctrl |= IGC_CTRL_TFCE; + break; + case igc_fc_full: + ctrl |= (IGC_CTRL_TFCE | IGC_CTRL_RFCE); + break; + default: + hw_dbg("Flow control param set incorrectly\n"); + ret_val = -IGC_ERR_CONFIG; + goto out; + } + + wr32(IGC_CTRL, ctrl); + +out: + return ret_val; +} + +/** + * igc_set_fc_watermarks - Set flow control high/low watermarks + * @hw: pointer to the HW structure + * + * Sets the flow control high/low threshold (watermark) registers. If + * flow control XON frame transmission is enabled, then set XON frame + * transmission as well. + */ +static s32 igc_set_fc_watermarks(struct igc_hw *hw) +{ + u32 fcrtl = 0, fcrth = 0; + + /* Set the flow control receive threshold registers. Normally, + * these registers will be set to a default threshold that may be + * adjusted later by the driver's runtime code. However, if the + * ability to transmit pause frames is not enabled, then these + * registers will be set to 0. + */ + if (hw->fc.current_mode & igc_fc_tx_pause) { + /* We need to set up the Receive Threshold high and low water + * marks as well as (optionally) enabling the transmission of + * XON frames. + */ + fcrtl = hw->fc.low_water; + if (hw->fc.send_xon) + fcrtl |= IGC_FCRTL_XONE; + + fcrth = hw->fc.high_water; + } + wr32(IGC_FCRTL, fcrtl); + wr32(IGC_FCRTH, fcrth); + + return 0; +} + +/** + * igc_clear_hw_cntrs_base - Clear base hardware counters + * @hw: pointer to the HW structure + * + * Clears the base hardware counters by reading the counter registers. + */ +void igc_clear_hw_cntrs_base(struct igc_hw *hw) +{ + rd32(IGC_CRCERRS); + rd32(IGC_SYMERRS); + rd32(IGC_MPC); + rd32(IGC_SCC); + rd32(IGC_ECOL); + rd32(IGC_MCC); + rd32(IGC_LATECOL); + rd32(IGC_COLC); + rd32(IGC_DC); + rd32(IGC_SEC); + rd32(IGC_RLEC); + rd32(IGC_XONRXC); + rd32(IGC_XONTXC); + rd32(IGC_XOFFRXC); + rd32(IGC_XOFFTXC); + rd32(IGC_FCRUC); + rd32(IGC_GPRC); + rd32(IGC_BPRC); + rd32(IGC_MPRC); + rd32(IGC_GPTC); + rd32(IGC_GORCL); + rd32(IGC_GORCH); + rd32(IGC_GOTCL); + rd32(IGC_GOTCH); + rd32(IGC_RNBC); + rd32(IGC_RUC); + rd32(IGC_RFC); + rd32(IGC_ROC); + rd32(IGC_RJC); + rd32(IGC_TORL); + rd32(IGC_TORH); + rd32(IGC_TOTL); + rd32(IGC_TOTH); + rd32(IGC_TPR); + rd32(IGC_TPT); + rd32(IGC_MPTC); + rd32(IGC_BPTC); + + rd32(IGC_PRC64); + rd32(IGC_PRC127); + rd32(IGC_PRC255); + rd32(IGC_PRC511); + rd32(IGC_PRC1023); + rd32(IGC_PRC1522); + rd32(IGC_PTC64); + rd32(IGC_PTC127); + rd32(IGC_PTC255); + rd32(IGC_PTC511); + rd32(IGC_PTC1023); + rd32(IGC_PTC1522); + + rd32(IGC_ALGNERRC); + rd32(IGC_RXERRC); + rd32(IGC_TNCRS); + rd32(IGC_CEXTERR); + rd32(IGC_TSCTC); + rd32(IGC_TSCTFC); + + rd32(IGC_MGTPRC); + rd32(IGC_MGTPDC); + rd32(IGC_MGTPTC); + + rd32(IGC_IAC); + rd32(IGC_ICRXOC); + + rd32(IGC_ICRXPTC); + rd32(IGC_ICRXATC); + rd32(IGC_ICTXPTC); + rd32(IGC_ICTXATC); + rd32(IGC_ICTXQEC); + rd32(IGC_ICTXQMTC); + rd32(IGC_ICRXDMTC); + + rd32(IGC_CBTMPC); + rd32(IGC_HTDPMC); + rd32(IGC_CBRMPC); + rd32(IGC_RPTHC); + rd32(IGC_HGPTC); + rd32(IGC_HTCBDPC); + rd32(IGC_HGORCL); + rd32(IGC_HGORCH); + rd32(IGC_HGOTCL); + rd32(IGC_HGOTCH); + rd32(IGC_LENERRS); +} + +/** + * igc_rar_set - Set receive address register + * @hw: pointer to the HW structure + * @addr: pointer to the receive address + * @index: receive address array register + * + * Sets the receive address array register at index to the address passed + * in by addr. + */ +void igc_rar_set(struct igc_hw *hw, u8 *addr, u32 index) +{ + u32 rar_low, rar_high; + + /* HW expects these in little endian so we reverse the byte order + * from network order (big endian) to little endian + */ + rar_low = ((u32)addr[0] | + ((u32)addr[1] << 8) | + ((u32)addr[2] << 16) | ((u32)addr[3] << 24)); + + rar_high = ((u32)addr[4] | ((u32)addr[5] << 8)); + + /* If MAC address zero, no need to set the AV bit */ + if (rar_low || rar_high) + rar_high |= IGC_RAH_AV; + + /* Some bridges will combine consecutive 32-bit writes into + * a single burst write, which will malfunction on some parts. + * The flushes avoid this. + */ + wr32(IGC_RAL(index), rar_low); + wrfl(); + wr32(IGC_RAH(index), rar_high); + wrfl(); +} + +/** + * igc_check_for_copper_link - Check for link (Copper) + * @hw: pointer to the HW structure + * + * Checks to see of the link status of the hardware has changed. If a + * change in link status has been detected, then we read the PHY registers + * to get the current speed/duplex if link exists. + */ +s32 igc_check_for_copper_link(struct igc_hw *hw) +{ + struct igc_mac_info *mac = &hw->mac; + s32 ret_val; + bool link; + + /* We only want to go out to the PHY registers to see if Auto-Neg + * has completed and/or if our link status has changed. The + * get_link_status flag is set upon receiving a Link Status + * Change or Rx Sequence Error interrupt. + */ + if (!mac->get_link_status) { + ret_val = 0; + goto out; + } + + /* First we want to see if the MII Status Register reports + * link. If so, then we want to get the current speed/duplex + * of the PHY. + */ + ret_val = igc_phy_has_link(hw, 1, 0, &link); + if (ret_val) + goto out; + + if (!link) + goto out; /* No link detected */ + + mac->get_link_status = false; + + /* Check if there was DownShift, must be checked + * immediately after link-up + */ + igc_check_downshift(hw); + + /* If we are forcing speed/duplex, then we simply return since + * we have already determined whether we have link or not. + */ + if (!mac->autoneg) { + ret_val = -IGC_ERR_CONFIG; + goto out; + } + + /* Auto-Neg is enabled. Auto Speed Detection takes care + * of MAC speed/duplex configuration. So we only need to + * configure Collision Distance in the MAC. + */ + igc_config_collision_dist(hw); + + /* Configure Flow Control now that Auto-Neg has completed. + * First, we need to restore the desired flow control + * settings because we may have had to re-autoneg with a + * different link partner. + */ + ret_val = igc_config_fc_after_link_up(hw); + if (ret_val) + hw_dbg("Error configuring flow control\n"); + +out: + return ret_val; +} + +/** + * igc_config_collision_dist - Configure collision distance + * @hw: pointer to the HW structure + * + * Configures the collision distance to the default value and is used + * during link setup. Currently no func pointer exists and all + * implementations are handled in the generic version of this function. + */ +void igc_config_collision_dist(struct igc_hw *hw) +{ + u32 tctl; + + tctl = rd32(IGC_TCTL); + + tctl &= ~IGC_TCTL_COLD; + tctl |= IGC_COLLISION_DISTANCE << IGC_COLD_SHIFT; + + wr32(IGC_TCTL, tctl); + wrfl(); +} + +/** + * igc_config_fc_after_link_up - Configures flow control after link + * @hw: pointer to the HW structure + * + * Checks the status of auto-negotiation after link up to ensure that the + * speed and duplex were not forced. If the link needed to be forced, then + * flow control needs to be forced also. If auto-negotiation is enabled + * and did not fail, then we configure flow control based on our link + * partner. + */ +s32 igc_config_fc_after_link_up(struct igc_hw *hw) +{ + u16 mii_status_reg, mii_nway_adv_reg, mii_nway_lp_ability_reg; + struct igc_mac_info *mac = &hw->mac; + u16 speed, duplex; + s32 ret_val = 0; + + /* Check for the case where we have fiber media and auto-neg failed + * so we had to force link. In this case, we need to force the + * configuration of the MAC to match the "fc" parameter. + */ + if (mac->autoneg_failed) { + if (hw->phy.media_type == igc_media_type_copper) + ret_val = igc_force_mac_fc(hw); + } + + if (ret_val) { + hw_dbg("Error forcing flow control settings\n"); + goto out; + } + + /* Check for the case where we have copper media and auto-neg is + * enabled. In this case, we need to check and see if Auto-Neg + * has completed, and if so, how the PHY and link partner has + * flow control configured. + */ + if (hw->phy.media_type == igc_media_type_copper && mac->autoneg) { + /* Read the MII Status Register and check to see if AutoNeg + * has completed. We read this twice because this reg has + * some "sticky" (latched) bits. + */ + ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, + &mii_status_reg); + if (ret_val) + goto out; + ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, + &mii_status_reg); + if (ret_val) + goto out; + + if (!(mii_status_reg & MII_SR_AUTONEG_COMPLETE)) { + hw_dbg("Copper PHY and Auto Neg has not completed.\n"); + goto out; + } + + /* The AutoNeg process has completed, so we now need to + * read both the Auto Negotiation Advertisement + * Register (Address 4) and the Auto_Negotiation Base + * Page Ability Register (Address 5) to determine how + * flow control was negotiated. + */ + ret_val = hw->phy.ops.read_reg(hw, PHY_AUTONEG_ADV, + &mii_nway_adv_reg); + if (ret_val) + goto out; + ret_val = hw->phy.ops.read_reg(hw, PHY_LP_ABILITY, + &mii_nway_lp_ability_reg); + if (ret_val) + goto out; + /* Two bits in the Auto Negotiation Advertisement Register + * (Address 4) and two bits in the Auto Negotiation Base + * Page Ability Register (Address 5) determine flow control + * for both the PHY and the link partner. The following + * table, taken out of the IEEE 802.3ab/D6.0 dated March 25, + * 1999, describes these PAUSE resolution bits and how flow + * control is determined based upon these settings. + * NOTE: DC = Don't Care + * + * LOCAL DEVICE | LINK PARTNER + * PAUSE | ASM_DIR | PAUSE | ASM_DIR | NIC Resolution + *-------|---------|-------|---------|-------------------- + * 0 | 0 | DC | DC | igc_fc_none + * 0 | 1 | 0 | DC | igc_fc_none + * 0 | 1 | 1 | 0 | igc_fc_none + * 0 | 1 | 1 | 1 | igc_fc_tx_pause + * 1 | 0 | 0 | DC | igc_fc_none + * 1 | DC | 1 | DC | igc_fc_full + * 1 | 1 | 0 | 0 | igc_fc_none + * 1 | 1 | 0 | 1 | igc_fc_rx_pause + * + * Are both PAUSE bits set to 1? If so, this implies + * Symmetric Flow Control is enabled at both ends. The + * ASM_DIR bits are irrelevant per the spec. + * + * For Symmetric Flow Control: + * + * LOCAL DEVICE | LINK PARTNER + * PAUSE | ASM_DIR | PAUSE | ASM_DIR | Result + *-------|---------|-------|---------|-------------------- + * 1 | DC | 1 | DC | IGC_fc_full + * + */ + if ((mii_nway_adv_reg & NWAY_AR_PAUSE) && + (mii_nway_lp_ability_reg & NWAY_LPAR_PAUSE)) { + /* Now we need to check if the user selected RX ONLY + * of pause frames. In this case, we had to advertise + * FULL flow control because we could not advertise RX + * ONLY. Hence, we must now check to see if we need to + * turn OFF the TRANSMISSION of PAUSE frames. + */ + if (hw->fc.requested_mode == igc_fc_full) { + hw->fc.current_mode = igc_fc_full; + hw_dbg("Flow Control = FULL.\n"); + } else { + hw->fc.current_mode = igc_fc_rx_pause; + hw_dbg("Flow Control = RX PAUSE frames only.\n"); + } + } + + /* For receiving PAUSE frames ONLY. + * + * LOCAL DEVICE | LINK PARTNER + * PAUSE | ASM_DIR | PAUSE | ASM_DIR | Result + *-------|---------|-------|---------|-------------------- + * 0 | 1 | 1 | 1 | igc_fc_tx_pause + */ + else if (!(mii_nway_adv_reg & NWAY_AR_PAUSE) && + (mii_nway_adv_reg & NWAY_AR_ASM_DIR) && + (mii_nway_lp_ability_reg & NWAY_LPAR_PAUSE) && + (mii_nway_lp_ability_reg & NWAY_LPAR_ASM_DIR)) { + hw->fc.current_mode = igc_fc_tx_pause; + hw_dbg("Flow Control = TX PAUSE frames only.\n"); + } + /* For transmitting PAUSE frames ONLY. + * + * LOCAL DEVICE | LINK PARTNER + * PAUSE | ASM_DIR | PAUSE | ASM_DIR | Result + *-------|---------|-------|---------|-------------------- + * 1 | 1 | 0 | 1 | igc_fc_rx_pause + */ + else if ((mii_nway_adv_reg & NWAY_AR_PAUSE) && + (mii_nway_adv_reg & NWAY_AR_ASM_DIR) && + !(mii_nway_lp_ability_reg & NWAY_LPAR_PAUSE) && + (mii_nway_lp_ability_reg & NWAY_LPAR_ASM_DIR)) { + hw->fc.current_mode = igc_fc_rx_pause; + hw_dbg("Flow Control = RX PAUSE frames only.\n"); + } + /* Per the IEEE spec, at this point flow control should be + * disabled. However, we want to consider that we could + * be connected to a legacy switch that doesn't advertise + * desired flow control, but can be forced on the link + * partner. So if we advertised no flow control, that is + * what we will resolve to. If we advertised some kind of + * receive capability (Rx Pause Only or Full Flow Control) + * and the link partner advertised none, we will configure + * ourselves to enable Rx Flow Control only. We can do + * this safely for two reasons: If the link partner really + * didn't want flow control enabled, and we enable Rx, no + * harm done since we won't be receiving any PAUSE frames + * anyway. If the intent on the link partner was to have + * flow control enabled, then by us enabling RX only, we + * can at least receive pause frames and process them. + * This is a good idea because in most cases, since we are + * predominantly a server NIC, more times than not we will + * be asked to delay transmission of packets than asking + * our link partner to pause transmission of frames. + */ + else if ((hw->fc.requested_mode == igc_fc_none) || + (hw->fc.requested_mode == igc_fc_tx_pause) || + (hw->fc.strict_ieee)) { + hw->fc.current_mode = igc_fc_none; + hw_dbg("Flow Control = NONE.\n"); + } else { + hw->fc.current_mode = igc_fc_rx_pause; + hw_dbg("Flow Control = RX PAUSE frames only.\n"); + } + + /* Now we need to do one last check... If we auto- + * negotiated to HALF DUPLEX, flow control should not be + * enabled per IEEE 802.3 spec. + */ + ret_val = hw->mac.ops.get_speed_and_duplex(hw, &speed, &duplex); + if (ret_val) { + hw_dbg("Error getting link speed and duplex\n"); + goto out; + } + + if (duplex == HALF_DUPLEX) + hw->fc.current_mode = igc_fc_none; + + /* Now we call a subroutine to actually force the MAC + * controller to use the correct flow control settings. + */ + ret_val = igc_force_mac_fc(hw); + if (ret_val) { + hw_dbg("Error forcing flow control settings\n"); + goto out; + } + } + +out: + return 0; +} + +/** + * igc_get_auto_rd_done - Check for auto read completion + * @hw: pointer to the HW structure + * + * Check EEPROM for Auto Read done bit. + */ +s32 igc_get_auto_rd_done(struct igc_hw *hw) +{ + s32 ret_val = 0; + s32 i = 0; + + while (i < AUTO_READ_DONE_TIMEOUT) { + if (rd32(IGC_EECD) & IGC_EECD_AUTO_RD) + break; + usleep_range(1000, 2000); + i++; + } + + if (i == AUTO_READ_DONE_TIMEOUT) { + hw_dbg("Auto read by HW from NVM has not completed.\n"); + ret_val = -IGC_ERR_RESET; + goto out; + } + +out: + return ret_val; +} + +/** + * igc_get_speed_and_duplex_copper - Retrieve current speed/duplex + * @hw: pointer to the HW structure + * @speed: stores the current speed + * @duplex: stores the current duplex + * + * Read the status register for the current speed/duplex and store the current + * speed and duplex for copper connections. + */ +s32 igc_get_speed_and_duplex_copper(struct igc_hw *hw, u16 *speed, + u16 *duplex) +{ + u32 status; + + status = rd32(IGC_STATUS); + if (status & IGC_STATUS_SPEED_1000) { + /* For I225, STATUS will indicate 1G speed in both 1 Gbps + * and 2.5 Gbps link modes. An additional bit is used + * to differentiate between 1 Gbps and 2.5 Gbps. + */ + if (hw->mac.type == igc_i225 && + (status & IGC_STATUS_SPEED_2500)) { + *speed = SPEED_2500; + hw_dbg("2500 Mbs, "); + } else { + *speed = SPEED_1000; + hw_dbg("1000 Mbs, "); + } + } else if (status & IGC_STATUS_SPEED_100) { + *speed = SPEED_100; + hw_dbg("100 Mbs, "); + } else { + *speed = SPEED_10; + hw_dbg("10 Mbs, "); + } + + if (status & IGC_STATUS_FD) { + *duplex = FULL_DUPLEX; + hw_dbg("Full Duplex\n"); + } else { + *duplex = HALF_DUPLEX; + hw_dbg("Half Duplex\n"); + } + + return 0; +} + +/** + * igc_put_hw_semaphore - Release hardware semaphore + * @hw: pointer to the HW structure + * + * Release hardware semaphore used to access the PHY or NVM + */ +void igc_put_hw_semaphore(struct igc_hw *hw) +{ + u32 swsm; + + swsm = rd32(IGC_SWSM); + + swsm &= ~(IGC_SWSM_SMBI | IGC_SWSM_SWESMBI); + + wr32(IGC_SWSM, swsm); +} + +/** + * igc_enable_mng_pass_thru - Enable processing of ARP's + * @hw: pointer to the HW structure + * + * Verifies the hardware needs to leave interface enabled so that frames can + * be directed to and from the management interface. + */ +bool igc_enable_mng_pass_thru(struct igc_hw *hw) +{ + bool ret_val = false; + u32 fwsm, factps; + u32 manc; + + if (!hw->mac.asf_firmware_present) + goto out; + + manc = rd32(IGC_MANC); + + if (!(manc & IGC_MANC_RCV_TCO_EN)) + goto out; + + if (hw->mac.arc_subsystem_valid) { + fwsm = rd32(IGC_FWSM); + factps = rd32(IGC_FACTPS); + + if (!(factps & IGC_FACTPS_MNGCG) && + ((fwsm & IGC_FWSM_MODE_MASK) == + (igc_mng_mode_pt << IGC_FWSM_MODE_SHIFT))) { + ret_val = true; + goto out; + } + } else { + if ((manc & IGC_MANC_SMBUS_EN) && + !(manc & IGC_MANC_ASF_EN)) { + ret_val = true; + goto out; + } + } + +out: + return ret_val; +} diff --git a/drivers/net/ethernet/intel/igc/igc_mac.h b/drivers/net/ethernet/intel/igc/igc_mac.h new file mode 100644 index 000000000000..782bc995badc --- /dev/null +++ b/drivers/net/ethernet/intel/igc/igc_mac.h @@ -0,0 +1,41 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2018 Intel Corporation */ + +#ifndef _IGC_MAC_H_ +#define _IGC_MAC_H_ + +#include "igc_hw.h" +#include "igc_phy.h" +#include "igc_defines.h" + +#ifndef IGC_REMOVED +#define IGC_REMOVED(a) (0) +#endif /* IGC_REMOVED */ + +/* forward declaration */ +s32 igc_disable_pcie_master(struct igc_hw *hw); +s32 igc_check_for_copper_link(struct igc_hw *hw); +s32 igc_config_fc_after_link_up(struct igc_hw *hw); +s32 igc_force_mac_fc(struct igc_hw *hw); +void igc_init_rx_addrs(struct igc_hw *hw, u16 rar_count); +s32 igc_setup_link(struct igc_hw *hw); +void igc_clear_hw_cntrs_base(struct igc_hw *hw); +s32 igc_get_auto_rd_done(struct igc_hw *hw); +void igc_put_hw_semaphore(struct igc_hw *hw); +void igc_rar_set(struct igc_hw *hw, u8 *addr, u32 index); +void igc_config_collision_dist(struct igc_hw *hw); + +s32 igc_get_speed_and_duplex_copper(struct igc_hw *hw, u16 *speed, + u16 *duplex); + +bool igc_enable_mng_pass_thru(struct igc_hw *hw); + +enum igc_mng_mode { + igc_mng_mode_none = 0, + igc_mng_mode_asf, + igc_mng_mode_pt, + igc_mng_mode_ipmi, + igc_mng_mode_host_if_only +}; + +#endif diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c new file mode 100644 index 000000000000..9d85707e8a81 --- /dev/null +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -0,0 +1,3901 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2018 Intel Corporation */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/if_vlan.h> +#include <linux/aer.h> + +#include "igc.h" +#include "igc_hw.h" + +#define DRV_VERSION "0.0.1-k" +#define DRV_SUMMARY "Intel(R) 2.5G Ethernet Linux Driver" + +static int debug = -1; + +MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); +MODULE_DESCRIPTION(DRV_SUMMARY); +MODULE_LICENSE("GPL v2"); +MODULE_VERSION(DRV_VERSION); +module_param(debug, int, 0); +MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); + +char igc_driver_name[] = "igc"; +char igc_driver_version[] = DRV_VERSION; +static const char igc_driver_string[] = DRV_SUMMARY; +static const char igc_copyright[] = + "Copyright(c) 2018 Intel Corporation."; + +static const struct igc_info *igc_info_tbl[] = { + [board_base] = &igc_base_info, +}; + +static const struct pci_device_id igc_pci_tbl[] = { + { PCI_VDEVICE(INTEL, IGC_DEV_ID_I225_LM), board_base }, + { PCI_VDEVICE(INTEL, IGC_DEV_ID_I225_V), board_base }, + /* required last entry */ + {0, } +}; + +MODULE_DEVICE_TABLE(pci, igc_pci_tbl); + +/* forward declaration */ +static void igc_clean_tx_ring(struct igc_ring *tx_ring); +static int igc_sw_init(struct igc_adapter *); +static void igc_configure(struct igc_adapter *adapter); +static void igc_power_down_link(struct igc_adapter *adapter); +static void igc_set_default_mac_filter(struct igc_adapter *adapter); +static void igc_set_rx_mode(struct net_device *netdev); +static void igc_write_itr(struct igc_q_vector *q_vector); +static void igc_assign_vector(struct igc_q_vector *q_vector, int msix_vector); +static void igc_free_q_vector(struct igc_adapter *adapter, int v_idx); +static void igc_set_interrupt_capability(struct igc_adapter *adapter, + bool msix); +static void igc_free_q_vectors(struct igc_adapter *adapter); +static void igc_irq_disable(struct igc_adapter *adapter); +static void igc_irq_enable(struct igc_adapter *adapter); +static void igc_configure_msix(struct igc_adapter *adapter); +static bool igc_alloc_mapped_page(struct igc_ring *rx_ring, + struct igc_rx_buffer *bi); + +enum latency_range { + lowest_latency = 0, + low_latency = 1, + bulk_latency = 2, + latency_invalid = 255 +}; + +static void igc_reset(struct igc_adapter *adapter) +{ + struct pci_dev *pdev = adapter->pdev; + struct igc_hw *hw = &adapter->hw; + + hw->mac.ops.reset_hw(hw); + + if (hw->mac.ops.init_hw(hw)) + dev_err(&pdev->dev, "Hardware Error\n"); + + if (!netif_running(adapter->netdev)) + igc_power_down_link(adapter); + + igc_get_phy_info(hw); +} + +/** + * igc_power_up_link - Power up the phy/serdes link + * @adapter: address of board private structure + */ +static void igc_power_up_link(struct igc_adapter *adapter) +{ + igc_reset_phy(&adapter->hw); + + if (adapter->hw.phy.media_type == igc_media_type_copper) + igc_power_up_phy_copper(&adapter->hw); + + igc_setup_link(&adapter->hw); +} + +/** + * igc_power_down_link - Power down the phy/serdes link + * @adapter: address of board private structure + */ +static void igc_power_down_link(struct igc_adapter *adapter) +{ + if (adapter->hw.phy.media_type == igc_media_type_copper) + igc_power_down_phy_copper_base(&adapter->hw); +} + +/** + * igc_release_hw_control - release control of the h/w to f/w + * @adapter: address of board private structure + * + * igc_release_hw_control resets CTRL_EXT:DRV_LOAD bit. + * For ASF and Pass Through versions of f/w this means that the + * driver is no longer loaded. + */ +static void igc_release_hw_control(struct igc_adapter *adapter) +{ + struct igc_hw *hw = &adapter->hw; + u32 ctrl_ext; + + /* Let firmware take over control of h/w */ + ctrl_ext = rd32(IGC_CTRL_EXT); + wr32(IGC_CTRL_EXT, + ctrl_ext & ~IGC_CTRL_EXT_DRV_LOAD); +} + +/** + * igc_get_hw_control - get control of the h/w from f/w + * @adapter: address of board private structure + * + * igc_get_hw_control sets CTRL_EXT:DRV_LOAD bit. + * For ASF and Pass Through versions of f/w this means that + * the driver is loaded. + */ +static void igc_get_hw_control(struct igc_adapter *adapter) +{ + struct igc_hw *hw = &adapter->hw; + u32 ctrl_ext; + + /* Let firmware know the driver has taken over */ + ctrl_ext = rd32(IGC_CTRL_EXT); + wr32(IGC_CTRL_EXT, + ctrl_ext | IGC_CTRL_EXT_DRV_LOAD); +} + +/** + * igc_free_tx_resources - Free Tx Resources per Queue + * @tx_ring: Tx descriptor ring for a specific queue + * + * Free all transmit software resources + */ +static void igc_free_tx_resources(struct igc_ring *tx_ring) +{ + igc_clean_tx_ring(tx_ring); + + vfree(tx_ring->tx_buffer_info); + tx_ring->tx_buffer_info = NULL; + + /* if not set, then don't free */ + if (!tx_ring->desc) + return; + + dma_free_coherent(tx_ring->dev, tx_ring->size, + tx_ring->desc, tx_ring->dma); + + tx_ring->desc = NULL; +} + +/** + * igc_free_all_tx_resources - Free Tx Resources for All Queues + * @adapter: board private structure + * + * Free all transmit software resources + */ +static void igc_free_all_tx_resources(struct igc_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->num_tx_queues; i++) + igc_free_tx_resources(adapter->tx_ring[i]); +} + +/** + * igc_clean_tx_ring - Free Tx Buffers + * @tx_ring: ring to be cleaned + */ +static void igc_clean_tx_ring(struct igc_ring *tx_ring) +{ + u16 i = tx_ring->next_to_clean; + struct igc_tx_buffer *tx_buffer = &tx_ring->tx_buffer_info[i]; + + while (i != tx_ring->next_to_use) { + union igc_adv_tx_desc *eop_desc, *tx_desc; + + /* Free all the Tx ring sk_buffs */ + dev_kfree_skb_any(tx_buffer->skb); + + /* unmap skb header data */ + dma_unmap_single(tx_ring->dev, + dma_unmap_addr(tx_buffer, dma), + dma_unmap_len(tx_buffer, len), + DMA_TO_DEVICE); + + /* check for eop_desc to determine the end of the packet */ + eop_desc = tx_buffer->next_to_watch; + tx_desc = IGC_TX_DESC(tx_ring, i); + + /* unmap remaining buffers */ + while (tx_desc != eop_desc) { + tx_buffer++; + tx_desc++; + i++; + if (unlikely(i == tx_ring->count)) { + i = 0; + tx_buffer = tx_ring->tx_buffer_info; + tx_desc = IGC_TX_DESC(tx_ring, 0); + } + + /* unmap any remaining paged data */ + if (dma_unmap_len(tx_buffer, len)) + dma_unmap_page(tx_ring->dev, + dma_unmap_addr(tx_buffer, dma), + dma_unmap_len(tx_buffer, len), + DMA_TO_DEVICE); + } + + /* move us one more past the eop_desc for start of next pkt */ + tx_buffer++; + i++; + if (unlikely(i == tx_ring->count)) { + i = 0; + tx_buffer = tx_ring->tx_buffer_info; + } + } + + /* reset BQL for queue */ + netdev_tx_reset_queue(txring_txq(tx_ring)); + + /* reset next_to_use and next_to_clean */ + tx_ring->next_to_use = 0; + tx_ring->next_to_clean = 0; +} + +/** + * igc_clean_all_tx_rings - Free Tx Buffers for all queues + * @adapter: board private structure + */ +static void igc_clean_all_tx_rings(struct igc_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->num_tx_queues; i++) + if (adapter->tx_ring[i]) + igc_clean_tx_ring(adapter->tx_ring[i]); +} + +/** + * igc_setup_tx_resources - allocate Tx resources (Descriptors) + * @tx_ring: tx descriptor ring (for a specific queue) to setup + * + * Return 0 on success, negative on failure + */ +static int igc_setup_tx_resources(struct igc_ring *tx_ring) +{ + struct device *dev = tx_ring->dev; + int size = 0; + + size = sizeof(struct igc_tx_buffer) * tx_ring->count; + tx_ring->tx_buffer_info = vzalloc(size); + if (!tx_ring->tx_buffer_info) + goto err; + + /* round up to nearest 4K */ + tx_ring->size = tx_ring->count * sizeof(union igc_adv_tx_desc); + tx_ring->size = ALIGN(tx_ring->size, 4096); + + tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size, + &tx_ring->dma, GFP_KERNEL); + + if (!tx_ring->desc) + goto err; + + tx_ring->next_to_use = 0; + tx_ring->next_to_clean = 0; + + return 0; + +err: + vfree(tx_ring->tx_buffer_info); + dev_err(dev, + "Unable to allocate memory for the transmit descriptor ring\n"); + return -ENOMEM; +} + +/** + * igc_setup_all_tx_resources - wrapper to allocate Tx resources for all queues + * @adapter: board private structure + * + * Return 0 on success, negative on failure + */ +static int igc_setup_all_tx_resources(struct igc_adapter *adapter) +{ + struct pci_dev *pdev = adapter->pdev; + int i, err = 0; + + for (i = 0; i < adapter->num_tx_queues; i++) { + err = igc_setup_tx_resources(adapter->tx_ring[i]); + if (err) { + dev_err(&pdev->dev, + "Allocation for Tx Queue %u failed\n", i); + for (i--; i >= 0; i--) + igc_free_tx_resources(adapter->tx_ring[i]); + break; + } + } + + return err; +} + +/** + * igc_clean_rx_ring - Free Rx Buffers per Queue + * @rx_ring: ring to free buffers from + */ +static void igc_clean_rx_ring(struct igc_ring *rx_ring) +{ + u16 i = rx_ring->next_to_clean; + + if (rx_ring->skb) + dev_kfree_skb(rx_ring->skb); + rx_ring->skb = NULL; + + /* Free all the Rx ring sk_buffs */ + while (i != rx_ring->next_to_alloc) { + struct igc_rx_buffer *buffer_info = &rx_ring->rx_buffer_info[i]; + + /* Invalidate cache lines that may have been written to by + * device so that we avoid corrupting memory. + */ + dma_sync_single_range_for_cpu(rx_ring->dev, + buffer_info->dma, + buffer_info->page_offset, + igc_rx_bufsz(rx_ring), + DMA_FROM_DEVICE); + + /* free resources associated with mapping */ + dma_unmap_page_attrs(rx_ring->dev, + buffer_info->dma, + igc_rx_pg_size(rx_ring), + DMA_FROM_DEVICE, + IGC_RX_DMA_ATTR); + __page_frag_cache_drain(buffer_info->page, + buffer_info->pagecnt_bias); + + i++; + if (i == rx_ring->count) + i = 0; + } + + rx_ring->next_to_alloc = 0; + rx_ring->next_to_clean = 0; + rx_ring->next_to_use = 0; +} + +/** + * igc_clean_all_rx_rings - Free Rx Buffers for all queues + * @adapter: board private structure + */ +static void igc_clean_all_rx_rings(struct igc_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->num_rx_queues; i++) + if (adapter->rx_ring[i]) + igc_clean_rx_ring(adapter->rx_ring[i]); +} + +/** + * igc_free_rx_resources - Free Rx Resources + * @rx_ring: ring to clean the resources from + * + * Free all receive software resources + */ +static void igc_free_rx_resources(struct igc_ring *rx_ring) +{ + igc_clean_rx_ring(rx_ring); + + vfree(rx_ring->rx_buffer_info); + rx_ring->rx_buffer_info = NULL; + + /* if not set, then don't free */ + if (!rx_ring->desc) + return; + + dma_free_coherent(rx_ring->dev, rx_ring->size, + rx_ring->desc, rx_ring->dma); + + rx_ring->desc = NULL; +} + +/** + * igc_free_all_rx_resources - Free Rx Resources for All Queues + * @adapter: board private structure + * + * Free all receive software resources + */ +static void igc_free_all_rx_resources(struct igc_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->num_rx_queues; i++) + igc_free_rx_resources(adapter->rx_ring[i]); +} + +/** + * igc_setup_rx_resources - allocate Rx resources (Descriptors) + * @rx_ring: rx descriptor ring (for a specific queue) to setup + * + * Returns 0 on success, negative on failure + */ +static int igc_setup_rx_resources(struct igc_ring *rx_ring) +{ + struct device *dev = rx_ring->dev; + int size, desc_len; + + size = sizeof(struct igc_rx_buffer) * rx_ring->count; + rx_ring->rx_buffer_info = vzalloc(size); + if (!rx_ring->rx_buffer_info) + goto err; + + desc_len = sizeof(union igc_adv_rx_desc); + + /* Round up to nearest 4K */ + rx_ring->size = rx_ring->count * desc_len; + rx_ring->size = ALIGN(rx_ring->size, 4096); + + rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size, + &rx_ring->dma, GFP_KERNEL); + + if (!rx_ring->desc) + goto err; + + rx_ring->next_to_alloc = 0; + rx_ring->next_to_clean = 0; + rx_ring->next_to_use = 0; + + return 0; + +err: + vfree(rx_ring->rx_buffer_info); + rx_ring->rx_buffer_info = NULL; + dev_err(dev, + "Unable to allocate memory for the receive descriptor ring\n"); + return -ENOMEM; +} + +/** + * igc_setup_all_rx_resources - wrapper to allocate Rx resources + * (Descriptors) for all queues + * @adapter: board private structure + * + * Return 0 on success, negative on failure + */ +static int igc_setup_all_rx_resources(struct igc_adapter *adapter) +{ + struct pci_dev *pdev = adapter->pdev; + int i, err = 0; + + for (i = 0; i < adapter->num_rx_queues; i++) { + err = igc_setup_rx_resources(adapter->rx_ring[i]); + if (err) { + dev_err(&pdev->dev, + "Allocation for Rx Queue %u failed\n", i); + for (i--; i >= 0; i--) + igc_free_rx_resources(adapter->rx_ring[i]); + break; + } + } + + return err; +} + +/** + * igc_configure_rx_ring - Configure a receive ring after Reset + * @adapter: board private structure + * @ring: receive ring to be configured + * + * Configure the Rx unit of the MAC after a reset. + */ +static void igc_configure_rx_ring(struct igc_adapter *adapter, + struct igc_ring *ring) +{ + struct igc_hw *hw = &adapter->hw; + union igc_adv_rx_desc *rx_desc; + int reg_idx = ring->reg_idx; + u32 srrctl = 0, rxdctl = 0; + u64 rdba = ring->dma; + + /* disable the queue */ + wr32(IGC_RXDCTL(reg_idx), 0); + + /* Set DMA base address registers */ + wr32(IGC_RDBAL(reg_idx), + rdba & 0x00000000ffffffffULL); + wr32(IGC_RDBAH(reg_idx), rdba >> 32); + wr32(IGC_RDLEN(reg_idx), + ring->count * sizeof(union igc_adv_rx_desc)); + + /* initialize head and tail */ + ring->tail = adapter->io_addr + IGC_RDT(reg_idx); + wr32(IGC_RDH(reg_idx), 0); + writel(0, ring->tail); + + /* reset next-to- use/clean to place SW in sync with hardware */ + ring->next_to_clean = 0; + ring->next_to_use = 0; + + /* set descriptor configuration */ + srrctl = IGC_RX_HDR_LEN << IGC_SRRCTL_BSIZEHDRSIZE_SHIFT; + if (ring_uses_large_buffer(ring)) + srrctl |= IGC_RXBUFFER_3072 >> IGC_SRRCTL_BSIZEPKT_SHIFT; + else + srrctl |= IGC_RXBUFFER_2048 >> IGC_SRRCTL_BSIZEPKT_SHIFT; + srrctl |= IGC_SRRCTL_DESCTYPE_ADV_ONEBUF; + + wr32(IGC_SRRCTL(reg_idx), srrctl); + + rxdctl |= IGC_RX_PTHRESH; + rxdctl |= IGC_RX_HTHRESH << 8; + rxdctl |= IGC_RX_WTHRESH << 16; + + /* initialize rx_buffer_info */ + memset(ring->rx_buffer_info, 0, + sizeof(struct igc_rx_buffer) * ring->count); + + /* initialize Rx descriptor 0 */ + rx_desc = IGC_RX_DESC(ring, 0); + rx_desc->wb.upper.length = 0; + + /* enable receive descriptor fetching */ + rxdctl |= IGC_RXDCTL_QUEUE_ENABLE; + + wr32(IGC_RXDCTL(reg_idx), rxdctl); +} + +/** + * igc_configure_rx - Configure receive Unit after Reset + * @adapter: board private structure + * + * Configure the Rx unit of the MAC after a reset. + */ +static void igc_configure_rx(struct igc_adapter *adapter) +{ + int i; + + /* Setup the HW Rx Head and Tail Descriptor Pointers and + * the Base and Length of the Rx Descriptor Ring + */ + for (i = 0; i < adapter->num_rx_queues; i++) + igc_configure_rx_ring(adapter, adapter->rx_ring[i]); +} + +/** + * igc_configure_tx_ring - Configure transmit ring after Reset + * @adapter: board private structure + * @ring: tx ring to configure + * + * Configure a transmit ring after a reset. + */ +static void igc_configure_tx_ring(struct igc_adapter *adapter, + struct igc_ring *ring) +{ + struct igc_hw *hw = &adapter->hw; + int reg_idx = ring->reg_idx; + u64 tdba = ring->dma; + u32 txdctl = 0; + + /* disable the queue */ + wr32(IGC_TXDCTL(reg_idx), 0); + wrfl(); + mdelay(10); + + wr32(IGC_TDLEN(reg_idx), + ring->count * sizeof(union igc_adv_tx_desc)); + wr32(IGC_TDBAL(reg_idx), + tdba & 0x00000000ffffffffULL); + wr32(IGC_TDBAH(reg_idx), tdba >> 32); + + ring->tail = adapter->io_addr + IGC_TDT(reg_idx); + wr32(IGC_TDH(reg_idx), 0); + writel(0, ring->tail); + + txdctl |= IGC_TX_PTHRESH; + txdctl |= IGC_TX_HTHRESH << 8; + txdctl |= IGC_TX_WTHRESH << 16; + + txdctl |= IGC_TXDCTL_QUEUE_ENABLE; + wr32(IGC_TXDCTL(reg_idx), txdctl); +} + +/** + * igc_configure_tx - Configure transmit Unit after Reset + * @adapter: board private structure + * + * Configure the Tx unit of the MAC after a reset. + */ +static void igc_configure_tx(struct igc_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->num_tx_queues; i++) + igc_configure_tx_ring(adapter, adapter->tx_ring[i]); +} + +/** + * igc_setup_mrqc - configure the multiple receive queue control registers + * @adapter: Board private structure + */ +static void igc_setup_mrqc(struct igc_adapter *adapter) +{ +} + +/** + * igc_setup_rctl - configure the receive control registers + * @adapter: Board private structure + */ +static void igc_setup_rctl(struct igc_adapter *adapter) +{ + struct igc_hw *hw = &adapter->hw; + u32 rctl; + + rctl = rd32(IGC_RCTL); + + rctl &= ~(3 << IGC_RCTL_MO_SHIFT); + rctl &= ~(IGC_RCTL_LBM_TCVR | IGC_RCTL_LBM_MAC); + + rctl |= IGC_RCTL_EN | IGC_RCTL_BAM | IGC_RCTL_RDMTS_HALF | + (hw->mac.mc_filter_type << IGC_RCTL_MO_SHIFT); + + /* enable stripping of CRC. Newer features require + * that the HW strips the CRC. + */ + rctl |= IGC_RCTL_SECRC; + + /* disable store bad packets and clear size bits. */ + rctl &= ~(IGC_RCTL_SBP | IGC_RCTL_SZ_256); + + /* enable LPE to allow for reception of jumbo frames */ + rctl |= IGC_RCTL_LPE; + + /* disable queue 0 to prevent tail write w/o re-config */ + wr32(IGC_RXDCTL(0), 0); + + /* This is useful for sniffing bad packets. */ + if (adapter->netdev->features & NETIF_F_RXALL) { + /* UPE and MPE will be handled by normal PROMISC logic + * in set_rx_mode + */ + rctl |= (IGC_RCTL_SBP | /* Receive bad packets */ + IGC_RCTL_BAM | /* RX All Bcast Pkts */ + IGC_RCTL_PMCF); /* RX All MAC Ctrl Pkts */ + + rctl &= ~(IGC_RCTL_DPF | /* Allow filtered pause */ + IGC_RCTL_CFIEN); /* Disable VLAN CFIEN Filter */ + } + + wr32(IGC_RCTL, rctl); +} + +/** + * igc_setup_tctl - configure the transmit control registers + * @adapter: Board private structure + */ +static void igc_setup_tctl(struct igc_adapter *adapter) +{ + struct igc_hw *hw = &adapter->hw; + u32 tctl; + + /* disable queue 0 which icould be enabled by default */ + wr32(IGC_TXDCTL(0), 0); + + /* Program the Transmit Control Register */ + tctl = rd32(IGC_TCTL); + tctl &= ~IGC_TCTL_CT; + tctl |= IGC_TCTL_PSP | IGC_TCTL_RTLC | + (IGC_COLLISION_THRESHOLD << IGC_CT_SHIFT); + + /* Enable transmits */ + tctl |= IGC_TCTL_EN; + + wr32(IGC_TCTL, tctl); +} + +/** + * igc_set_mac - Change the Ethernet Address of the NIC + * @netdev: network interface device structure + * @p: pointer to an address structure + * + * Returns 0 on success, negative on failure + */ +static int igc_set_mac(struct net_device *netdev, void *p) +{ + struct igc_adapter *adapter = netdev_priv(netdev); + struct igc_hw *hw = &adapter->hw; + struct sockaddr *addr = p; + + if (!is_valid_ether_addr(addr->sa_data)) + return -EADDRNOTAVAIL; + + memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); + memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len); + + /* set the correct pool for the new PF MAC address in entry 0 */ + igc_set_default_mac_filter(adapter); + + return 0; +} + +static void igc_tx_csum(struct igc_ring *tx_ring, struct igc_tx_buffer *first) +{ +} + +static int __igc_maybe_stop_tx(struct igc_ring *tx_ring, const u16 size) +{ + struct net_device *netdev = tx_ring->netdev; + + netif_stop_subqueue(netdev, tx_ring->queue_index); + + /* memory barriier comment */ + smp_mb(); + + /* We need to check again in a case another CPU has just + * made room available. + */ + if (igc_desc_unused(tx_ring) < size) + return -EBUSY; + + /* A reprieve! */ + netif_wake_subqueue(netdev, tx_ring->queue_index); + + u64_stats_update_begin(&tx_ring->tx_syncp2); + tx_ring->tx_stats.restart_queue2++; + u64_stats_update_end(&tx_ring->tx_syncp2); + + return 0; +} + +static inline int igc_maybe_stop_tx(struct igc_ring *tx_ring, const u16 size) +{ + if (igc_desc_unused(tx_ring) >= size) + return 0; + return __igc_maybe_stop_tx(tx_ring, size); +} + +static u32 igc_tx_cmd_type(struct sk_buff *skb, u32 tx_flags) +{ + /* set type for advanced descriptor with frame checksum insertion */ + u32 cmd_type = IGC_ADVTXD_DTYP_DATA | + IGC_ADVTXD_DCMD_DEXT | + IGC_ADVTXD_DCMD_IFCS; + + return cmd_type; +} + +static void igc_tx_olinfo_status(struct igc_ring *tx_ring, + union igc_adv_tx_desc *tx_desc, + u32 tx_flags, unsigned int paylen) +{ + u32 olinfo_status = paylen << IGC_ADVTXD_PAYLEN_SHIFT; + + /* insert L4 checksum */ + olinfo_status |= (tx_flags & IGC_TX_FLAGS_CSUM) * + ((IGC_TXD_POPTS_TXSM << 8) / + IGC_TX_FLAGS_CSUM); + + /* insert IPv4 checksum */ + olinfo_status |= (tx_flags & IGC_TX_FLAGS_IPV4) * + (((IGC_TXD_POPTS_IXSM << 8)) / + IGC_TX_FLAGS_IPV4); + + tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status); +} + +static int igc_tx_map(struct igc_ring *tx_ring, + struct igc_tx_buffer *first, + const u8 hdr_len) +{ + struct sk_buff *skb = first->skb; + struct igc_tx_buffer *tx_buffer; + union igc_adv_tx_desc *tx_desc; + u32 tx_flags = first->tx_flags; + struct skb_frag_struct *frag; + u16 i = tx_ring->next_to_use; + unsigned int data_len, size; + dma_addr_t dma; + u32 cmd_type = igc_tx_cmd_type(skb, tx_flags); + + tx_desc = IGC_TX_DESC(tx_ring, i); + + igc_tx_olinfo_status(tx_ring, tx_desc, tx_flags, skb->len - hdr_len); + + size = skb_headlen(skb); + data_len = skb->data_len; + + dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE); + + tx_buffer = first; + + for (frag = &skb_shinfo(skb)->frags[0];; frag++) { + if (dma_mapping_error(tx_ring->dev, dma)) + goto dma_error; + + /* record length, and DMA address */ + dma_unmap_len_set(tx_buffer, len, size); + dma_unmap_addr_set(tx_buffer, dma, dma); + + tx_desc->read.buffer_addr = cpu_to_le64(dma); + + while (unlikely(size > IGC_MAX_DATA_PER_TXD)) { + tx_desc->read.cmd_type_len = + cpu_to_le32(cmd_type ^ IGC_MAX_DATA_PER_TXD); + + i++; + tx_desc++; + if (i == tx_ring->count) { + tx_desc = IGC_TX_DESC(tx_ring, 0); + i = 0; + } + tx_desc->read.olinfo_status = 0; + + dma += IGC_MAX_DATA_PER_TXD; + size -= IGC_MAX_DATA_PER_TXD; + + tx_desc->read.buffer_addr = cpu_to_le64(dma); + } + + if (likely(!data_len)) + break; + + tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type ^ size); + + i++; + tx_desc++; + if (i == tx_ring->count) { + tx_desc = IGC_TX_DESC(tx_ring, 0); + i = 0; + } + tx_desc->read.olinfo_status = 0; + + size = skb_frag_size(frag); + data_len -= size; + + dma = skb_frag_dma_map(tx_ring->dev, frag, 0, + size, DMA_TO_DEVICE); + + tx_buffer = &tx_ring->tx_buffer_info[i]; + } + + /* write last descriptor with RS and EOP bits */ + cmd_type |= size | IGC_TXD_DCMD; + tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type); + + netdev_tx_sent_queue(txring_txq(tx_ring), first->bytecount); + + /* set the timestamp */ + first->time_stamp = jiffies; + + /* Force memory writes to complete before letting h/w know there + * are new descriptors to fetch. (Only applicable for weak-ordered + * memory model archs, such as IA-64). + * + * We also need this memory barrier to make certain all of the + * status bits have been updated before next_to_watch is written. + */ + wmb(); + + /* set next_to_watch value indicating a packet is present */ + first->next_to_watch = tx_desc; + + i++; + if (i == tx_ring->count) + i = 0; + + tx_ring->next_to_use = i; + + /* Make sure there is space in the ring for the next send. */ + igc_maybe_stop_tx(tx_ring, DESC_NEEDED); + + if (netif_xmit_stopped(txring_txq(tx_ring)) || !skb->xmit_more) { + writel(i, tx_ring->tail); + + /* we need this if more than one processor can write to our tail + * at a time, it synchronizes IO on IA64/Altix systems + */ + mmiowb(); + } + + return 0; +dma_error: + dev_err(tx_ring->dev, "TX DMA map failed\n"); + tx_buffer = &tx_ring->tx_buffer_info[i]; + + /* clear dma mappings for failed tx_buffer_info map */ + while (tx_buffer != first) { + if (dma_unmap_len(tx_buffer, len)) + dma_unmap_page(tx_ring->dev, + dma_unmap_addr(tx_buffer, dma), + dma_unmap_len(tx_buffer, len), + DMA_TO_DEVICE); + dma_unmap_len_set(tx_buffer, len, 0); + + if (i-- == 0) + i += tx_ring->count; + tx_buffer = &tx_ring->tx_buffer_info[i]; + } + + if (dma_unmap_len(tx_buffer, len)) + dma_unmap_single(tx_ring->dev, + dma_unmap_addr(tx_buffer, dma), + dma_unmap_len(tx_buffer, len), + DMA_TO_DEVICE); + dma_unmap_len_set(tx_buffer, len, 0); + + dev_kfree_skb_any(tx_buffer->skb); + tx_buffer->skb = NULL; + + tx_ring->next_to_use = i; + + return -1; +} + +static netdev_tx_t igc_xmit_frame_ring(struct sk_buff *skb, + struct igc_ring *tx_ring) +{ + u16 count = TXD_USE_COUNT(skb_headlen(skb)); + __be16 protocol = vlan_get_protocol(skb); + struct igc_tx_buffer *first; + u32 tx_flags = 0; + unsigned short f; + u8 hdr_len = 0; + + /* need: 1 descriptor per page * PAGE_SIZE/IGC_MAX_DATA_PER_TXD, + * + 1 desc for skb_headlen/IGC_MAX_DATA_PER_TXD, + * + 2 desc gap to keep tail from touching head, + * + 1 desc for context descriptor, + * otherwise try next time + */ + for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) + count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size); + + if (igc_maybe_stop_tx(tx_ring, count + 3)) { + /* this is a hard error */ + return NETDEV_TX_BUSY; + } + + /* record the location of the first descriptor for this packet */ + first = &tx_ring->tx_buffer_info[tx_ring->next_to_use]; + first->skb = skb; + first->bytecount = skb->len; + first->gso_segs = 1; + + skb_tx_timestamp(skb); + + /* record initial flags and protocol */ + first->tx_flags = tx_flags; + first->protocol = protocol; + + igc_tx_csum(tx_ring, first); + + igc_tx_map(tx_ring, first, hdr_len); + + return NETDEV_TX_OK; +} + +static inline struct igc_ring *igc_tx_queue_mapping(struct igc_adapter *adapter, + struct sk_buff *skb) +{ + unsigned int r_idx = skb->queue_mapping; + + if (r_idx >= adapter->num_tx_queues) + r_idx = r_idx % adapter->num_tx_queues; + + return adapter->tx_ring[r_idx]; +} + +static netdev_tx_t igc_xmit_frame(struct sk_buff *skb, + struct net_device *netdev) +{ + struct igc_adapter *adapter = netdev_priv(netdev); + + /* The minimum packet size with TCTL.PSP set is 17 so pad the skb + * in order to meet this minimum size requirement. + */ + if (skb->len < 17) { + if (skb_padto(skb, 17)) + return NETDEV_TX_OK; + skb->len = 17; + } + + return igc_xmit_frame_ring(skb, igc_tx_queue_mapping(adapter, skb)); +} + +static inline void igc_rx_hash(struct igc_ring *ring, + union igc_adv_rx_desc *rx_desc, + struct sk_buff *skb) +{ + if (ring->netdev->features & NETIF_F_RXHASH) + skb_set_hash(skb, + le32_to_cpu(rx_desc->wb.lower.hi_dword.rss), + PKT_HASH_TYPE_L3); +} + +/** + * igc_process_skb_fields - Populate skb header fields from Rx descriptor + * @rx_ring: rx descriptor ring packet is being transacted on + * @rx_desc: pointer to the EOP Rx descriptor + * @skb: pointer to current skb being populated + * + * This function checks the ring, descriptor, and packet information in + * order to populate the hash, checksum, VLAN, timestamp, protocol, and + * other fields within the skb. + */ +static void igc_process_skb_fields(struct igc_ring *rx_ring, + union igc_adv_rx_desc *rx_desc, + struct sk_buff *skb) +{ + igc_rx_hash(rx_ring, rx_desc, skb); + + skb_record_rx_queue(skb, rx_ring->queue_index); + + skb->protocol = eth_type_trans(skb, rx_ring->netdev); +} + +static struct igc_rx_buffer *igc_get_rx_buffer(struct igc_ring *rx_ring, + const unsigned int size) +{ + struct igc_rx_buffer *rx_buffer; + + rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean]; + prefetchw(rx_buffer->page); + + /* we are reusing so sync this buffer for CPU use */ + dma_sync_single_range_for_cpu(rx_ring->dev, + rx_buffer->dma, + rx_buffer->page_offset, + size, + DMA_FROM_DEVICE); + + rx_buffer->pagecnt_bias--; + + return rx_buffer; +} + +/** + * igc_add_rx_frag - Add contents of Rx buffer to sk_buff + * @rx_ring: rx descriptor ring to transact packets on + * @rx_buffer: buffer containing page to add + * @skb: sk_buff to place the data into + * @size: size of buffer to be added + * + * This function will add the data contained in rx_buffer->page to the skb. + */ +static void igc_add_rx_frag(struct igc_ring *rx_ring, + struct igc_rx_buffer *rx_buffer, + struct sk_buff *skb, + unsigned int size) +{ +#if (PAGE_SIZE < 8192) + unsigned int truesize = igc_rx_pg_size(rx_ring) / 2; + + skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, rx_buffer->page, + rx_buffer->page_offset, size, truesize); + rx_buffer->page_offset ^= truesize; +#else + unsigned int truesize = ring_uses_build_skb(rx_ring) ? + SKB_DATA_ALIGN(IGC_SKB_PAD + size) : + SKB_DATA_ALIGN(size); + skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, rx_buffer->page, + rx_buffer->page_offset, size, truesize); + rx_buffer->page_offset += truesize; +#endif +} + +static struct sk_buff *igc_build_skb(struct igc_ring *rx_ring, + struct igc_rx_buffer *rx_buffer, + union igc_adv_rx_desc *rx_desc, + unsigned int size) +{ + void *va = page_address(rx_buffer->page) + rx_buffer->page_offset; +#if (PAGE_SIZE < 8192) + unsigned int truesize = igc_rx_pg_size(rx_ring) / 2; +#else + unsigned int truesize = SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) + + SKB_DATA_ALIGN(IGC_SKB_PAD + size); +#endif + struct sk_buff *skb; + + /* prefetch first cache line of first page */ + prefetch(va); +#if L1_CACHE_BYTES < 128 + prefetch(va + L1_CACHE_BYTES); +#endif + + /* build an skb around the page buffer */ + skb = build_skb(va - IGC_SKB_PAD, truesize); + if (unlikely(!skb)) + return NULL; + + /* update pointers within the skb to store the data */ + skb_reserve(skb, IGC_SKB_PAD); + __skb_put(skb, size); + + /* update buffer offset */ +#if (PAGE_SIZE < 8192) + rx_buffer->page_offset ^= truesize; +#else + rx_buffer->page_offset += truesize; +#endif + + return skb; +} + +static struct sk_buff *igc_construct_skb(struct igc_ring *rx_ring, + struct igc_rx_buffer *rx_buffer, + union igc_adv_rx_desc *rx_desc, + unsigned int size) +{ + void *va = page_address(rx_buffer->page) + rx_buffer->page_offset; +#if (PAGE_SIZE < 8192) + unsigned int truesize = igc_rx_pg_size(rx_ring) / 2; +#else + unsigned int truesize = SKB_DATA_ALIGN(size); +#endif + unsigned int headlen; + struct sk_buff *skb; + + /* prefetch first cache line of first page */ + prefetch(va); +#if L1_CACHE_BYTES < 128 + prefetch(va + L1_CACHE_BYTES); +#endif + + /* allocate a skb to store the frags */ + skb = napi_alloc_skb(&rx_ring->q_vector->napi, IGC_RX_HDR_LEN); + if (unlikely(!skb)) + return NULL; + + /* Determine available headroom for copy */ + headlen = size; + if (headlen > IGC_RX_HDR_LEN) + headlen = eth_get_headlen(va, IGC_RX_HDR_LEN); + + /* align pull length to size of long to optimize memcpy performance */ + memcpy(__skb_put(skb, headlen), va, ALIGN(headlen, sizeof(long))); + + /* update all of the pointers */ + size -= headlen; + if (size) { + skb_add_rx_frag(skb, 0, rx_buffer->page, + (va + headlen) - page_address(rx_buffer->page), + size, truesize); +#if (PAGE_SIZE < 8192) + rx_buffer->page_offset ^= truesize; +#else + rx_buffer->page_offset += truesize; +#endif + } else { + rx_buffer->pagecnt_bias++; + } + + return skb; +} + +/** + * igc_reuse_rx_page - page flip buffer and store it back on the ring + * @rx_ring: rx descriptor ring to store buffers on + * @old_buff: donor buffer to have page reused + * + * Synchronizes page for reuse by the adapter + */ +static void igc_reuse_rx_page(struct igc_ring *rx_ring, + struct igc_rx_buffer *old_buff) +{ + u16 nta = rx_ring->next_to_alloc; + struct igc_rx_buffer *new_buff; + + new_buff = &rx_ring->rx_buffer_info[nta]; + + /* update, and store next to alloc */ + nta++; + rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0; + + /* Transfer page from old buffer to new buffer. + * Move each member individually to avoid possible store + * forwarding stalls. + */ + new_buff->dma = old_buff->dma; + new_buff->page = old_buff->page; + new_buff->page_offset = old_buff->page_offset; + new_buff->pagecnt_bias = old_buff->pagecnt_bias; +} + +static inline bool igc_page_is_reserved(struct page *page) +{ + return (page_to_nid(page) != numa_mem_id()) || page_is_pfmemalloc(page); +} + +static bool igc_can_reuse_rx_page(struct igc_rx_buffer *rx_buffer) +{ + unsigned int pagecnt_bias = rx_buffer->pagecnt_bias; + struct page *page = rx_buffer->page; + + /* avoid re-using remote pages */ + if (unlikely(igc_page_is_reserved(page))) + return false; + +#if (PAGE_SIZE < 8192) + /* if we are only owner of page we can reuse it */ + if (unlikely((page_ref_count(page) - pagecnt_bias) > 1)) + return false; +#else +#define IGC_LAST_OFFSET \ + (SKB_WITH_OVERHEAD(PAGE_SIZE) - IGC_RXBUFFER_2048) + + if (rx_buffer->page_offset > IGC_LAST_OFFSET) + return false; +#endif + + /* If we have drained the page fragment pool we need to update + * the pagecnt_bias and page count so that we fully restock the + * number of references the driver holds. + */ + if (unlikely(!pagecnt_bias)) { + page_ref_add(page, USHRT_MAX); + rx_buffer->pagecnt_bias = USHRT_MAX; + } + + return true; +} + +/** + * igc_is_non_eop - process handling of non-EOP buffers + * @rx_ring: Rx ring being processed + * @rx_desc: Rx descriptor for current buffer + * @skb: current socket buffer containing buffer in progress + * + * This function updates next to clean. If the buffer is an EOP buffer + * this function exits returning false, otherwise it will place the + * sk_buff in the next buffer to be chained and return true indicating + * that this is in fact a non-EOP buffer. + */ +static bool igc_is_non_eop(struct igc_ring *rx_ring, + union igc_adv_rx_desc *rx_desc) +{ + u32 ntc = rx_ring->next_to_clean + 1; + + /* fetch, update, and store next to clean */ + ntc = (ntc < rx_ring->count) ? ntc : 0; + rx_ring->next_to_clean = ntc; + + prefetch(IGC_RX_DESC(rx_ring, ntc)); + + if (likely(igc_test_staterr(rx_desc, IGC_RXD_STAT_EOP))) + return false; + + return true; +} + +/** + * igc_cleanup_headers - Correct corrupted or empty headers + * @rx_ring: rx descriptor ring packet is being transacted on + * @rx_desc: pointer to the EOP Rx descriptor + * @skb: pointer to current skb being fixed + * + * Address the case where we are pulling data in on pages only + * and as such no data is present in the skb header. + * + * In addition if skb is not at least 60 bytes we need to pad it so that + * it is large enough to qualify as a valid Ethernet frame. + * + * Returns true if an error was encountered and skb was freed. + */ +static bool igc_cleanup_headers(struct igc_ring *rx_ring, + union igc_adv_rx_desc *rx_desc, + struct sk_buff *skb) +{ + if (unlikely((igc_test_staterr(rx_desc, + IGC_RXDEXT_ERR_FRAME_ERR_MASK)))) { + struct net_device *netdev = rx_ring->netdev; + + if (!(netdev->features & NETIF_F_RXALL)) { + dev_kfree_skb_any(skb); + return true; + } + } + + /* if eth_skb_pad returns an error the skb was freed */ + if (eth_skb_pad(skb)) + return true; + + return false; +} + +static void igc_put_rx_buffer(struct igc_ring *rx_ring, + struct igc_rx_buffer *rx_buffer) +{ + if (igc_can_reuse_rx_page(rx_buffer)) { + /* hand second half of page back to the ring */ + igc_reuse_rx_page(rx_ring, rx_buffer); + } else { + /* We are not reusing the buffer so unmap it and free + * any references we are holding to it + */ + dma_unmap_page_attrs(rx_ring->dev, rx_buffer->dma, + igc_rx_pg_size(rx_ring), DMA_FROM_DEVICE, + IGC_RX_DMA_ATTR); + __page_frag_cache_drain(rx_buffer->page, + rx_buffer->pagecnt_bias); + } + + /* clear contents of rx_buffer */ + rx_buffer->page = NULL; +} + +/** + * igc_alloc_rx_buffers - Replace used receive buffers; packet split + * @adapter: address of board private structure + */ +static void igc_alloc_rx_buffers(struct igc_ring *rx_ring, u16 cleaned_count) +{ + union igc_adv_rx_desc *rx_desc; + u16 i = rx_ring->next_to_use; + struct igc_rx_buffer *bi; + u16 bufsz; + + /* nothing to do */ + if (!cleaned_count) + return; + + rx_desc = IGC_RX_DESC(rx_ring, i); + bi = &rx_ring->rx_buffer_info[i]; + i -= rx_ring->count; + + bufsz = igc_rx_bufsz(rx_ring); + + do { + if (!igc_alloc_mapped_page(rx_ring, bi)) + break; + + /* sync the buffer for use by the device */ + dma_sync_single_range_for_device(rx_ring->dev, bi->dma, + bi->page_offset, bufsz, + DMA_FROM_DEVICE); + + /* Refresh the desc even if buffer_addrs didn't change + * because each write-back erases this info. + */ + rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset); + + rx_desc++; + bi++; + i++; + if (unlikely(!i)) { + rx_desc = IGC_RX_DESC(rx_ring, 0); + bi = rx_ring->rx_buffer_info; + i -= rx_ring->count; + } + + /* clear the length for the next_to_use descriptor */ + rx_desc->wb.upper.length = 0; + + cleaned_count--; + } while (cleaned_count); + + i += rx_ring->count; + + if (rx_ring->next_to_use != i) { + /* record the next descriptor to use */ + rx_ring->next_to_use = i; + + /* update next to alloc since we have filled the ring */ + rx_ring->next_to_alloc = i; + + /* Force memory writes to complete before letting h/w + * know there are new descriptors to fetch. (Only + * applicable for weak-ordered memory model archs, + * such as IA-64). + */ + wmb(); + writel(i, rx_ring->tail); + } +} + +static int igc_clean_rx_irq(struct igc_q_vector *q_vector, const int budget) +{ + unsigned int total_bytes = 0, total_packets = 0; + struct igc_ring *rx_ring = q_vector->rx.ring; + struct sk_buff *skb = rx_ring->skb; + u16 cleaned_count = igc_desc_unused(rx_ring); + + while (likely(total_packets < budget)) { + union igc_adv_rx_desc *rx_desc; + struct igc_rx_buffer *rx_buffer; + unsigned int size; + + /* return some buffers to hardware, one at a time is too slow */ + if (cleaned_count >= IGC_RX_BUFFER_WRITE) { + igc_alloc_rx_buffers(rx_ring, cleaned_count); + cleaned_count = 0; + } + + rx_desc = IGC_RX_DESC(rx_ring, rx_ring->next_to_clean); + size = le16_to_cpu(rx_desc->wb.upper.length); + if (!size) + break; + + /* This memory barrier is needed to keep us from reading + * any other fields out of the rx_desc until we know the + * descriptor has been written back + */ + dma_rmb(); + + rx_buffer = igc_get_rx_buffer(rx_ring, size); + + /* retrieve a buffer from the ring */ + if (skb) + igc_add_rx_frag(rx_ring, rx_buffer, skb, size); + else if (ring_uses_build_skb(rx_ring)) + skb = igc_build_skb(rx_ring, rx_buffer, rx_desc, size); + else + skb = igc_construct_skb(rx_ring, rx_buffer, + rx_desc, size); + + /* exit if we failed to retrieve a buffer */ + if (!skb) { + rx_ring->rx_stats.alloc_failed++; + rx_buffer->pagecnt_bias++; + break; + } + + igc_put_rx_buffer(rx_ring, rx_buffer); + cleaned_count++; + + /* fetch next buffer in frame if non-eop */ + if (igc_is_non_eop(rx_ring, rx_desc)) + continue; + + /* verify the packet layout is correct */ + if (igc_cleanup_headers(rx_ring, rx_desc, skb)) { + skb = NULL; + continue; + } + + /* probably a little skewed due to removing CRC */ + total_bytes += skb->len; + + /* populate checksum, timestamp, VLAN, and protocol */ + igc_process_skb_fields(rx_ring, rx_desc, skb); + + napi_gro_receive(&q_vector->napi, skb); + + /* reset skb pointer */ + skb = NULL; + + /* update budget accounting */ + total_packets++; + } + + /* place incomplete frames back on ring for completion */ + rx_ring->skb = skb; + + u64_stats_update_begin(&rx_ring->rx_syncp); + rx_ring->rx_stats.packets += total_packets; + rx_ring->rx_stats.bytes += total_bytes; + u64_stats_update_end(&rx_ring->rx_syncp); + q_vector->rx.total_packets += total_packets; + q_vector->rx.total_bytes += total_bytes; + + if (cleaned_count) + igc_alloc_rx_buffers(rx_ring, cleaned_count); + + return total_packets; +} + +static inline unsigned int igc_rx_offset(struct igc_ring *rx_ring) +{ + return ring_uses_build_skb(rx_ring) ? IGC_SKB_PAD : 0; +} + +static bool igc_alloc_mapped_page(struct igc_ring *rx_ring, + struct igc_rx_buffer *bi) +{ + struct page *page = bi->page; + dma_addr_t dma; + + /* since we are recycling buffers we should seldom need to alloc */ + if (likely(page)) + return true; + + /* alloc new page for storage */ + page = dev_alloc_pages(igc_rx_pg_order(rx_ring)); + if (unlikely(!page)) { + rx_ring->rx_stats.alloc_failed++; + return false; + } + + /* map page for use */ + dma = dma_map_page_attrs(rx_ring->dev, page, 0, + igc_rx_pg_size(rx_ring), + DMA_FROM_DEVICE, + IGC_RX_DMA_ATTR); + + /* if mapping failed free memory back to system since + * there isn't much point in holding memory we can't use + */ + if (dma_mapping_error(rx_ring->dev, dma)) { + __free_page(page); + + rx_ring->rx_stats.alloc_failed++; + return false; + } + + bi->dma = dma; + bi->page = page; + bi->page_offset = igc_rx_offset(rx_ring); + bi->pagecnt_bias = 1; + + return true; +} + +/** + * igc_clean_tx_irq - Reclaim resources after transmit completes + * @q_vector: pointer to q_vector containing needed info + * @napi_budget: Used to determine if we are in netpoll + * + * returns true if ring is completely cleaned + */ +static bool igc_clean_tx_irq(struct igc_q_vector *q_vector, int napi_budget) +{ + struct igc_adapter *adapter = q_vector->adapter; + unsigned int total_bytes = 0, total_packets = 0; + unsigned int budget = q_vector->tx.work_limit; + struct igc_ring *tx_ring = q_vector->tx.ring; + unsigned int i = tx_ring->next_to_clean; + struct igc_tx_buffer *tx_buffer; + union igc_adv_tx_desc *tx_desc; + + if (test_bit(__IGC_DOWN, &adapter->state)) + return true; + + tx_buffer = &tx_ring->tx_buffer_info[i]; + tx_desc = IGC_TX_DESC(tx_ring, i); + i -= tx_ring->count; + + do { + union igc_adv_tx_desc *eop_desc = tx_buffer->next_to_watch; + + /* if next_to_watch is not set then there is no work pending */ + if (!eop_desc) + break; + + /* prevent any other reads prior to eop_desc */ + smp_rmb(); + + /* if DD is not set pending work has not been completed */ + if (!(eop_desc->wb.status & cpu_to_le32(IGC_TXD_STAT_DD))) + break; + + /* clear next_to_watch to prevent false hangs */ + tx_buffer->next_to_watch = NULL; + + /* update the statistics for this packet */ + total_bytes += tx_buffer->bytecount; + total_packets += tx_buffer->gso_segs; + + /* free the skb */ + napi_consume_skb(tx_buffer->skb, napi_budget); + + /* unmap skb header data */ + dma_unmap_single(tx_ring->dev, + dma_unmap_addr(tx_buffer, dma), + dma_unmap_len(tx_buffer, len), + DMA_TO_DEVICE); + + /* clear tx_buffer data */ + dma_unmap_len_set(tx_buffer, len, 0); + + /* clear last DMA location and unmap remaining buffers */ + while (tx_desc != eop_desc) { + tx_buffer++; + tx_desc++; + i++; + if (unlikely(!i)) { + i -= tx_ring->count; + tx_buffer = tx_ring->tx_buffer_info; + tx_desc = IGC_TX_DESC(tx_ring, 0); + } + + /* unmap any remaining paged data */ + if (dma_unmap_len(tx_buffer, len)) { + dma_unmap_page(tx_ring->dev, + dma_unmap_addr(tx_buffer, dma), + dma_unmap_len(tx_buffer, len), + DMA_TO_DEVICE); + dma_unmap_len_set(tx_buffer, len, 0); + } + } + + /* move us one more past the eop_desc for start of next pkt */ + tx_buffer++; + tx_desc++; + i++; + if (unlikely(!i)) { + i -= tx_ring->count; + tx_buffer = tx_ring->tx_buffer_info; + tx_desc = IGC_TX_DESC(tx_ring, 0); + } + + /* issue prefetch for next Tx descriptor */ + prefetch(tx_desc); + + /* update budget accounting */ + budget--; + } while (likely(budget)); + + netdev_tx_completed_queue(txring_txq(tx_ring), + total_packets, total_bytes); + + i += tx_ring->count; + tx_ring->next_to_clean = i; + u64_stats_update_begin(&tx_ring->tx_syncp); + tx_ring->tx_stats.bytes += total_bytes; + tx_ring->tx_stats.packets += total_packets; + u64_stats_update_end(&tx_ring->tx_syncp); + q_vector->tx.total_bytes += total_bytes; + q_vector->tx.total_packets += total_packets; + + if (test_bit(IGC_RING_FLAG_TX_DETECT_HANG, &tx_ring->flags)) { + struct igc_hw *hw = &adapter->hw; + + /* Detect a transmit hang in hardware, this serializes the + * check with the clearing of time_stamp and movement of i + */ + clear_bit(IGC_RING_FLAG_TX_DETECT_HANG, &tx_ring->flags); + if (tx_buffer->next_to_watch && + time_after(jiffies, tx_buffer->time_stamp + + (adapter->tx_timeout_factor * HZ)) && + !(rd32(IGC_STATUS) & IGC_STATUS_TXOFF)) { + /* detected Tx unit hang */ + dev_err(tx_ring->dev, + "Detected Tx Unit Hang\n" + " Tx Queue <%d>\n" + " TDH <%x>\n" + " TDT <%x>\n" + " next_to_use <%x>\n" + " next_to_clean <%x>\n" + "buffer_info[next_to_clean]\n" + " time_stamp <%lx>\n" + " next_to_watch <%p>\n" + " jiffies <%lx>\n" + " desc.status <%x>\n", + tx_ring->queue_index, + rd32(IGC_TDH(tx_ring->reg_idx)), + readl(tx_ring->tail), + tx_ring->next_to_use, + tx_ring->next_to_clean, + tx_buffer->time_stamp, + tx_buffer->next_to_watch, + jiffies, + tx_buffer->next_to_watch->wb.status); + netif_stop_subqueue(tx_ring->netdev, + tx_ring->queue_index); + + /* we are about to reset, no point in enabling stuff */ + return true; + } + } + +#define TX_WAKE_THRESHOLD (DESC_NEEDED * 2) + if (unlikely(total_packets && + netif_carrier_ok(tx_ring->netdev) && + igc_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD)) { + /* Make sure that anybody stopping the queue after this + * sees the new next_to_clean. + */ + smp_mb(); + if (__netif_subqueue_stopped(tx_ring->netdev, + tx_ring->queue_index) && + !(test_bit(__IGC_DOWN, &adapter->state))) { + netif_wake_subqueue(tx_ring->netdev, + tx_ring->queue_index); + + u64_stats_update_begin(&tx_ring->tx_syncp); + tx_ring->tx_stats.restart_queue++; + u64_stats_update_end(&tx_ring->tx_syncp); + } + } + + return !!budget; +} + +/** + * igc_ioctl - I/O control method + * @netdev: network interface device structure + * @ifreq: frequency + * @cmd: command + */ +static int igc_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) +{ + switch (cmd) { + default: + return -EOPNOTSUPP; + } +} + +/** + * igc_up - Open the interface and prepare it to handle traffic + * @adapter: board private structure + */ +static void igc_up(struct igc_adapter *adapter) +{ + struct igc_hw *hw = &adapter->hw; + int i = 0; + + /* hardware has been reset, we need to reload some things */ + igc_configure(adapter); + + clear_bit(__IGC_DOWN, &adapter->state); + + for (i = 0; i < adapter->num_q_vectors; i++) + napi_enable(&adapter->q_vector[i]->napi); + + if (adapter->msix_entries) + igc_configure_msix(adapter); + else + igc_assign_vector(adapter->q_vector[0], 0); + + /* Clear any pending interrupts. */ + rd32(IGC_ICR); + igc_irq_enable(adapter); + + netif_tx_start_all_queues(adapter->netdev); + + /* start the watchdog. */ + hw->mac.get_link_status = 1; + schedule_work(&adapter->watchdog_task); +} + +/** + * igc_update_stats - Update the board statistics counters + * @adapter: board private structure + */ +static void igc_update_stats(struct igc_adapter *adapter) +{ +} + +static void igc_nfc_filter_exit(struct igc_adapter *adapter) +{ +} + +/** + * igc_down - Close the interface + * @adapter: board private structure + */ +static void igc_down(struct igc_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + struct igc_hw *hw = &adapter->hw; + u32 tctl, rctl; + int i = 0; + + set_bit(__IGC_DOWN, &adapter->state); + + /* disable receives in the hardware */ + rctl = rd32(IGC_RCTL); + wr32(IGC_RCTL, rctl & ~IGC_RCTL_EN); + /* flush and sleep below */ + + igc_nfc_filter_exit(adapter); + + /* set trans_start so we don't get spurious watchdogs during reset */ + netif_trans_update(netdev); + + netif_carrier_off(netdev); + netif_tx_stop_all_queues(netdev); + + /* disable transmits in the hardware */ + tctl = rd32(IGC_TCTL); + tctl &= ~IGC_TCTL_EN; + wr32(IGC_TCTL, tctl); + /* flush both disables and wait for them to finish */ + wrfl(); + usleep_range(10000, 20000); + + igc_irq_disable(adapter); + + adapter->flags &= ~IGC_FLAG_NEED_LINK_UPDATE; + + for (i = 0; i < adapter->num_q_vectors; i++) { + if (adapter->q_vector[i]) { + napi_synchronize(&adapter->q_vector[i]->napi); + napi_disable(&adapter->q_vector[i]->napi); + } + } + + del_timer_sync(&adapter->watchdog_timer); + del_timer_sync(&adapter->phy_info_timer); + + /* record the stats before reset*/ + spin_lock(&adapter->stats64_lock); + igc_update_stats(adapter); + spin_unlock(&adapter->stats64_lock); + + adapter->link_speed = 0; + adapter->link_duplex = 0; + + if (!pci_channel_offline(adapter->pdev)) + igc_reset(adapter); + + /* clear VLAN promisc flag so VFTA will be updated if necessary */ + adapter->flags &= ~IGC_FLAG_VLAN_PROMISC; + + igc_clean_all_tx_rings(adapter); + igc_clean_all_rx_rings(adapter); +} + +static void igc_reinit_locked(struct igc_adapter *adapter) +{ + WARN_ON(in_interrupt()); + while (test_and_set_bit(__IGC_RESETTING, &adapter->state)) + usleep_range(1000, 2000); + igc_down(adapter); + igc_up(adapter); + clear_bit(__IGC_RESETTING, &adapter->state); +} + +static void igc_reset_task(struct work_struct *work) +{ + struct igc_adapter *adapter; + + adapter = container_of(work, struct igc_adapter, reset_task); + + netdev_err(adapter->netdev, "Reset adapter\n"); + igc_reinit_locked(adapter); +} + +/** + * igc_change_mtu - Change the Maximum Transfer Unit + * @netdev: network interface device structure + * @new_mtu: new value for maximum frame size + * + * Returns 0 on success, negative on failure + */ +static int igc_change_mtu(struct net_device *netdev, int new_mtu) +{ + int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN; + struct igc_adapter *adapter = netdev_priv(netdev); + struct pci_dev *pdev = adapter->pdev; + + /* adjust max frame to be at least the size of a standard frame */ + if (max_frame < (ETH_FRAME_LEN + ETH_FCS_LEN)) + max_frame = ETH_FRAME_LEN + ETH_FCS_LEN; + + while (test_and_set_bit(__IGC_RESETTING, &adapter->state)) + usleep_range(1000, 2000); + + /* igc_down has a dependency on max_frame_size */ + adapter->max_frame_size = max_frame; + + if (netif_running(netdev)) + igc_down(adapter); + + dev_info(&pdev->dev, "changing MTU from %d to %d\n", + netdev->mtu, new_mtu); + netdev->mtu = new_mtu; + + if (netif_running(netdev)) + igc_up(adapter); + else + igc_reset(adapter); + + clear_bit(__IGC_RESETTING, &adapter->state); + + return 0; +} + +/** + * igc_get_stats - Get System Network Statistics + * @netdev: network interface device structure + * + * Returns the address of the device statistics structure. + * The statistics are updated here and also from the timer callback. + */ +static struct net_device_stats *igc_get_stats(struct net_device *netdev) +{ + struct igc_adapter *adapter = netdev_priv(netdev); + + if (!test_bit(__IGC_RESETTING, &adapter->state)) + igc_update_stats(adapter); + + /* only return the current stats */ + return &netdev->stats; +} + +/** + * igc_configure - configure the hardware for RX and TX + * @adapter: private board structure + */ +static void igc_configure(struct igc_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + int i = 0; + + igc_get_hw_control(adapter); + igc_set_rx_mode(netdev); + + igc_setup_tctl(adapter); + igc_setup_mrqc(adapter); + igc_setup_rctl(adapter); + + igc_configure_tx(adapter); + igc_configure_rx(adapter); + + igc_rx_fifo_flush_base(&adapter->hw); + + /* call igc_desc_unused which always leaves + * at least 1 descriptor unused to make sure + * next_to_use != next_to_clean + */ + for (i = 0; i < adapter->num_rx_queues; i++) { + struct igc_ring *ring = adapter->rx_ring[i]; + + igc_alloc_rx_buffers(ring, igc_desc_unused(ring)); + } +} + +/** + * igc_rar_set_index - Sync RAL[index] and RAH[index] registers with MAC table + * @adapter: Pointer to adapter structure + * @index: Index of the RAR entry which need to be synced with MAC table + */ +static void igc_rar_set_index(struct igc_adapter *adapter, u32 index) +{ + u8 *addr = adapter->mac_table[index].addr; + struct igc_hw *hw = &adapter->hw; + u32 rar_low, rar_high; + + /* HW expects these to be in network order when they are plugged + * into the registers which are little endian. In order to guarantee + * that ordering we need to do an leXX_to_cpup here in order to be + * ready for the byteswap that occurs with writel + */ + rar_low = le32_to_cpup((__le32 *)(addr)); + rar_high = le16_to_cpup((__le16 *)(addr + 4)); + + /* Indicate to hardware the Address is Valid. */ + if (adapter->mac_table[index].state & IGC_MAC_STATE_IN_USE) { + if (is_valid_ether_addr(addr)) + rar_high |= IGC_RAH_AV; + + rar_high |= IGC_RAH_POOL_1 << + adapter->mac_table[index].queue; + } + + wr32(IGC_RAL(index), rar_low); + wrfl(); + wr32(IGC_RAH(index), rar_high); + wrfl(); +} + +/* Set default MAC address for the PF in the first RAR entry */ +static void igc_set_default_mac_filter(struct igc_adapter *adapter) +{ + struct igc_mac_addr *mac_table = &adapter->mac_table[0]; + + ether_addr_copy(mac_table->addr, adapter->hw.mac.addr); + mac_table->state = IGC_MAC_STATE_DEFAULT | IGC_MAC_STATE_IN_USE; + + igc_rar_set_index(adapter, 0); +} + +/** + * igc_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set + * @netdev: network interface device structure + * + * The set_rx_mode entry point is called whenever the unicast or multicast + * address lists or the network interface flags are updated. This routine is + * responsible for configuring the hardware for proper unicast, multicast, + * promiscuous mode, and all-multi behavior. + */ +static void igc_set_rx_mode(struct net_device *netdev) +{ +} + +/** + * igc_msix_other - msix other interrupt handler + * @irq: interrupt number + * @data: pointer to a q_vector + */ +static irqreturn_t igc_msix_other(int irq, void *data) +{ + struct igc_adapter *adapter = data; + struct igc_hw *hw = &adapter->hw; + u32 icr = rd32(IGC_ICR); + + /* reading ICR causes bit 31 of EICR to be cleared */ + if (icr & IGC_ICR_DRSTA) + schedule_work(&adapter->reset_task); + + if (icr & IGC_ICR_DOUTSYNC) { + /* HW is reporting DMA is out of sync */ + adapter->stats.doosync++; + } + + if (icr & IGC_ICR_LSC) { + hw->mac.get_link_status = 1; + /* guard against interrupt when we're going down */ + if (!test_bit(__IGC_DOWN, &adapter->state)) + mod_timer(&adapter->watchdog_timer, jiffies + 1); + } + + wr32(IGC_EIMS, adapter->eims_other); + + return IRQ_HANDLED; +} + +/** + * igc_write_ivar - configure ivar for given MSI-X vector + * @hw: pointer to the HW structure + * @msix_vector: vector number we are allocating to a given ring + * @index: row index of IVAR register to write within IVAR table + * @offset: column offset of in IVAR, should be multiple of 8 + * + * The IVAR table consists of 2 columns, + * each containing an cause allocation for an Rx and Tx ring, and a + * variable number of rows depending on the number of queues supported. + */ +static void igc_write_ivar(struct igc_hw *hw, int msix_vector, + int index, int offset) +{ + u32 ivar = array_rd32(IGC_IVAR0, index); + + /* clear any bits that are currently set */ + ivar &= ~((u32)0xFF << offset); + + /* write vector and valid bit */ + ivar |= (msix_vector | IGC_IVAR_VALID) << offset; + + array_wr32(IGC_IVAR0, index, ivar); +} + +static void igc_assign_vector(struct igc_q_vector *q_vector, int msix_vector) +{ + struct igc_adapter *adapter = q_vector->adapter; + struct igc_hw *hw = &adapter->hw; + int rx_queue = IGC_N0_QUEUE; + int tx_queue = IGC_N0_QUEUE; + + if (q_vector->rx.ring) + rx_queue = q_vector->rx.ring->reg_idx; + if (q_vector->tx.ring) + tx_queue = q_vector->tx.ring->reg_idx; + + switch (hw->mac.type) { + case igc_i225: + if (rx_queue > IGC_N0_QUEUE) + igc_write_ivar(hw, msix_vector, + rx_queue >> 1, + (rx_queue & 0x1) << 4); + if (tx_queue > IGC_N0_QUEUE) + igc_write_ivar(hw, msix_vector, + tx_queue >> 1, + ((tx_queue & 0x1) << 4) + 8); + q_vector->eims_value = BIT(msix_vector); + break; + default: + WARN_ONCE(hw->mac.type != igc_i225, "Wrong MAC type\n"); + break; + } + + /* add q_vector eims value to global eims_enable_mask */ + adapter->eims_enable_mask |= q_vector->eims_value; + + /* configure q_vector to set itr on first interrupt */ + q_vector->set_itr = 1; +} + +/** + * igc_configure_msix - Configure MSI-X hardware + * @adapter: Pointer to adapter structure + * + * igc_configure_msix sets up the hardware to properly + * generate MSI-X interrupts. + */ +static void igc_configure_msix(struct igc_adapter *adapter) +{ + struct igc_hw *hw = &adapter->hw; + int i, vector = 0; + u32 tmp; + + adapter->eims_enable_mask = 0; + + /* set vector for other causes, i.e. link changes */ + switch (hw->mac.type) { + case igc_i225: + /* Turn on MSI-X capability first, or our settings + * won't stick. And it will take days to debug. + */ + wr32(IGC_GPIE, IGC_GPIE_MSIX_MODE | + IGC_GPIE_PBA | IGC_GPIE_EIAME | + IGC_GPIE_NSICR); + + /* enable msix_other interrupt */ + adapter->eims_other = BIT(vector); + tmp = (vector++ | IGC_IVAR_VALID) << 8; + + wr32(IGC_IVAR_MISC, tmp); + break; + default: + /* do nothing, since nothing else supports MSI-X */ + break; + } /* switch (hw->mac.type) */ + + adapter->eims_enable_mask |= adapter->eims_other; + + for (i = 0; i < adapter->num_q_vectors; i++) + igc_assign_vector(adapter->q_vector[i], vector++); + + wrfl(); +} + +static irqreturn_t igc_msix_ring(int irq, void *data) +{ + struct igc_q_vector *q_vector = data; + + /* Write the ITR value calculated from the previous interrupt. */ + igc_write_itr(q_vector); + + napi_schedule(&q_vector->napi); + + return IRQ_HANDLED; +} + +/** + * igc_request_msix - Initialize MSI-X interrupts + * @adapter: Pointer to adapter structure + * + * igc_request_msix allocates MSI-X vectors and requests interrupts from the + * kernel. + */ +static int igc_request_msix(struct igc_adapter *adapter) +{ + int i = 0, err = 0, vector = 0, free_vector = 0; + struct net_device *netdev = adapter->netdev; + + err = request_irq(adapter->msix_entries[vector].vector, + &igc_msix_other, 0, netdev->name, adapter); + if (err) + goto err_out; + + for (i = 0; i < adapter->num_q_vectors; i++) { + struct igc_q_vector *q_vector = adapter->q_vector[i]; + + vector++; + + q_vector->itr_register = adapter->io_addr + IGC_EITR(vector); + + if (q_vector->rx.ring && q_vector->tx.ring) + sprintf(q_vector->name, "%s-TxRx-%u", netdev->name, + q_vector->rx.ring->queue_index); + else if (q_vector->tx.ring) + sprintf(q_vector->name, "%s-tx-%u", netdev->name, + q_vector->tx.ring->queue_index); + else if (q_vector->rx.ring) + sprintf(q_vector->name, "%s-rx-%u", netdev->name, + q_vector->rx.ring->queue_index); + else + sprintf(q_vector->name, "%s-unused", netdev->name); + + err = request_irq(adapter->msix_entries[vector].vector, + igc_msix_ring, 0, q_vector->name, + q_vector); + if (err) + goto err_free; + } + + igc_configure_msix(adapter); + return 0; + +err_free: + /* free already assigned IRQs */ + free_irq(adapter->msix_entries[free_vector++].vector, adapter); + + vector--; + for (i = 0; i < vector; i++) { + free_irq(adapter->msix_entries[free_vector++].vector, + adapter->q_vector[i]); + } +err_out: + return err; +} + +/** + * igc_reset_q_vector - Reset config for interrupt vector + * @adapter: board private structure to initialize + * @v_idx: Index of vector to be reset + * + * If NAPI is enabled it will delete any references to the + * NAPI struct. This is preparation for igc_free_q_vector. + */ +static void igc_reset_q_vector(struct igc_adapter *adapter, int v_idx) +{ + struct igc_q_vector *q_vector = adapter->q_vector[v_idx]; + + /* if we're coming from igc_set_interrupt_capability, the vectors are + * not yet allocated + */ + if (!q_vector) + return; + + if (q_vector->tx.ring) + adapter->tx_ring[q_vector->tx.ring->queue_index] = NULL; + + if (q_vector->rx.ring) + adapter->rx_ring[q_vector->rx.ring->queue_index] = NULL; + + netif_napi_del(&q_vector->napi); +} + +static void igc_reset_interrupt_capability(struct igc_adapter *adapter) +{ + int v_idx = adapter->num_q_vectors; + + if (adapter->msix_entries) { + pci_disable_msix(adapter->pdev); + kfree(adapter->msix_entries); + adapter->msix_entries = NULL; + } else if (adapter->flags & IGC_FLAG_HAS_MSI) { + pci_disable_msi(adapter->pdev); + } + + while (v_idx--) + igc_reset_q_vector(adapter, v_idx); +} + +/** + * igc_clear_interrupt_scheme - reset the device to a state of no interrupts + * @adapter: Pointer to adapter structure + * + * This function resets the device so that it has 0 rx queues, tx queues, and + * MSI-X interrupts allocated. + */ +static void igc_clear_interrupt_scheme(struct igc_adapter *adapter) +{ + igc_free_q_vectors(adapter); + igc_reset_interrupt_capability(adapter); +} + +/** + * igc_free_q_vectors - Free memory allocated for interrupt vectors + * @adapter: board private structure to initialize + * + * This function frees the memory allocated to the q_vectors. In addition if + * NAPI is enabled it will delete any references to the NAPI struct prior + * to freeing the q_vector. + */ +static void igc_free_q_vectors(struct igc_adapter *adapter) +{ + int v_idx = adapter->num_q_vectors; + + adapter->num_tx_queues = 0; + adapter->num_rx_queues = 0; + adapter->num_q_vectors = 0; + + while (v_idx--) { + igc_reset_q_vector(adapter, v_idx); + igc_free_q_vector(adapter, v_idx); + } +} + +/** + * igc_free_q_vector - Free memory allocated for specific interrupt vector + * @adapter: board private structure to initialize + * @v_idx: Index of vector to be freed + * + * This function frees the memory allocated to the q_vector. + */ +static void igc_free_q_vector(struct igc_adapter *adapter, int v_idx) +{ + struct igc_q_vector *q_vector = adapter->q_vector[v_idx]; + + adapter->q_vector[v_idx] = NULL; + + /* igc_get_stats64() might access the rings on this vector, + * we must wait a grace period before freeing it. + */ + if (q_vector) + kfree_rcu(q_vector, rcu); +} + +/* Need to wait a few seconds after link up to get diagnostic information from + * the phy + */ +static void igc_update_phy_info(struct timer_list *t) +{ + struct igc_adapter *adapter = from_timer(adapter, t, phy_info_timer); + + igc_get_phy_info(&adapter->hw); +} + +/** + * igc_has_link - check shared code for link and determine up/down + * @adapter: pointer to driver private info + */ +static bool igc_has_link(struct igc_adapter *adapter) +{ + struct igc_hw *hw = &adapter->hw; + bool link_active = false; + + /* get_link_status is set on LSC (link status) interrupt or + * rx sequence error interrupt. get_link_status will stay + * false until the igc_check_for_link establishes link + * for copper adapters ONLY + */ + switch (hw->phy.media_type) { + case igc_media_type_copper: + if (!hw->mac.get_link_status) + return true; + hw->mac.ops.check_for_link(hw); + link_active = !hw->mac.get_link_status; + break; + default: + case igc_media_type_unknown: + break; + } + + if (hw->mac.type == igc_i225 && + hw->phy.id == I225_I_PHY_ID) { + if (!netif_carrier_ok(adapter->netdev)) { + adapter->flags &= ~IGC_FLAG_NEED_LINK_UPDATE; + } else if (!(adapter->flags & IGC_FLAG_NEED_LINK_UPDATE)) { + adapter->flags |= IGC_FLAG_NEED_LINK_UPDATE; + adapter->link_check_timeout = jiffies; + } + } + + return link_active; +} + +/** + * igc_watchdog - Timer Call-back + * @data: pointer to adapter cast into an unsigned long + */ +static void igc_watchdog(struct timer_list *t) +{ + struct igc_adapter *adapter = from_timer(adapter, t, watchdog_timer); + /* Do the rest outside of interrupt context */ + schedule_work(&adapter->watchdog_task); +} + +static void igc_watchdog_task(struct work_struct *work) +{ + struct igc_adapter *adapter = container_of(work, + struct igc_adapter, + watchdog_task); + struct net_device *netdev = adapter->netdev; + struct igc_hw *hw = &adapter->hw; + struct igc_phy_info *phy = &hw->phy; + u16 phy_data, retry_count = 20; + u32 connsw; + u32 link; + int i; + + link = igc_has_link(adapter); + + if (adapter->flags & IGC_FLAG_NEED_LINK_UPDATE) { + if (time_after(jiffies, (adapter->link_check_timeout + HZ))) + adapter->flags &= ~IGC_FLAG_NEED_LINK_UPDATE; + else + link = false; + } + + /* Force link down if we have fiber to swap to */ + if (adapter->flags & IGC_FLAG_MAS_ENABLE) { + if (hw->phy.media_type == igc_media_type_copper) { + connsw = rd32(IGC_CONNSW); + if (!(connsw & IGC_CONNSW_AUTOSENSE_EN)) + link = 0; + } + } + if (link) { + if (!netif_carrier_ok(netdev)) { + u32 ctrl; + + hw->mac.ops.get_speed_and_duplex(hw, + &adapter->link_speed, + &adapter->link_duplex); + + ctrl = rd32(IGC_CTRL); + /* Link status message must follow this format */ + netdev_info(netdev, + "igc: %s NIC Link is Up %d Mbps %s Duplex, Flow Control: %s\n", + netdev->name, + adapter->link_speed, + adapter->link_duplex == FULL_DUPLEX ? + "Full" : "Half", + (ctrl & IGC_CTRL_TFCE) && + (ctrl & IGC_CTRL_RFCE) ? "RX/TX" : + (ctrl & IGC_CTRL_RFCE) ? "RX" : + (ctrl & IGC_CTRL_TFCE) ? "TX" : "None"); + + /* check if SmartSpeed worked */ + igc_check_downshift(hw); + if (phy->speed_downgraded) + netdev_warn(netdev, "Link Speed was downgraded by SmartSpeed\n"); + + /* adjust timeout factor according to speed/duplex */ + adapter->tx_timeout_factor = 1; + switch (adapter->link_speed) { + case SPEED_10: + adapter->tx_timeout_factor = 14; + break; + case SPEED_100: + /* maybe add some timeout factor ? */ + break; + } + + if (adapter->link_speed != SPEED_1000) + goto no_wait; + + /* wait for Remote receiver status OK */ +retry_read_status: + if (!igc_read_phy_reg(hw, PHY_1000T_STATUS, + &phy_data)) { + if (!(phy_data & SR_1000T_REMOTE_RX_STATUS) && + retry_count) { + msleep(100); + retry_count--; + goto retry_read_status; + } else if (!retry_count) { + dev_err(&adapter->pdev->dev, "exceed max 2 second\n"); + } + } else { + dev_err(&adapter->pdev->dev, "read 1000Base-T Status Reg\n"); + } +no_wait: + netif_carrier_on(netdev); + + /* link state has changed, schedule phy info update */ + if (!test_bit(__IGC_DOWN, &adapter->state)) + mod_timer(&adapter->phy_info_timer, + round_jiffies(jiffies + 2 * HZ)); + } + } else { + if (netif_carrier_ok(netdev)) { + adapter->link_speed = 0; + adapter->link_duplex = 0; + + /* Links status message must follow this format */ + netdev_info(netdev, "igc: %s NIC Link is Down\n", + netdev->name); + netif_carrier_off(netdev); + + /* link state has changed, schedule phy info update */ + if (!test_bit(__IGC_DOWN, &adapter->state)) + mod_timer(&adapter->phy_info_timer, + round_jiffies(jiffies + 2 * HZ)); + + /* link is down, time to check for alternate media */ + if (adapter->flags & IGC_FLAG_MAS_ENABLE) { + if (adapter->flags & IGC_FLAG_MEDIA_RESET) { + schedule_work(&adapter->reset_task); + /* return immediately */ + return; + } + } + + /* also check for alternate media here */ + } else if (!netif_carrier_ok(netdev) && + (adapter->flags & IGC_FLAG_MAS_ENABLE)) { + if (adapter->flags & IGC_FLAG_MEDIA_RESET) { + schedule_work(&adapter->reset_task); + /* return immediately */ + return; + } + } + } + + spin_lock(&adapter->stats64_lock); + igc_update_stats(adapter); + spin_unlock(&adapter->stats64_lock); + + for (i = 0; i < adapter->num_tx_queues; i++) { + struct igc_ring *tx_ring = adapter->tx_ring[i]; + + if (!netif_carrier_ok(netdev)) { + /* We've lost link, so the controller stops DMA, + * but we've got queued Tx work that's never going + * to get done, so reset controller to flush Tx. + * (Do the reset outside of interrupt context). + */ + if (igc_desc_unused(tx_ring) + 1 < tx_ring->count) { + adapter->tx_timeout_count++; + schedule_work(&adapter->reset_task); + /* return immediately since reset is imminent */ + return; + } + } + + /* Force detection of hung controller every watchdog period */ + set_bit(IGC_RING_FLAG_TX_DETECT_HANG, &tx_ring->flags); + } + + /* Cause software interrupt to ensure Rx ring is cleaned */ + if (adapter->flags & IGC_FLAG_HAS_MSIX) { + u32 eics = 0; + + for (i = 0; i < adapter->num_q_vectors; i++) + eics |= adapter->q_vector[i]->eims_value; + wr32(IGC_EICS, eics); + } else { + wr32(IGC_ICS, IGC_ICS_RXDMT0); + } + + /* Reset the timer */ + if (!test_bit(__IGC_DOWN, &adapter->state)) { + if (adapter->flags & IGC_FLAG_NEED_LINK_UPDATE) + mod_timer(&adapter->watchdog_timer, + round_jiffies(jiffies + HZ)); + else + mod_timer(&adapter->watchdog_timer, + round_jiffies(jiffies + 2 * HZ)); + } +} + +/** + * igc_update_ring_itr - update the dynamic ITR value based on packet size + * @q_vector: pointer to q_vector + * + * Stores a new ITR value based on strictly on packet size. This + * algorithm is less sophisticated than that used in igc_update_itr, + * due to the difficulty of synchronizing statistics across multiple + * receive rings. The divisors and thresholds used by this function + * were determined based on theoretical maximum wire speed and testing + * data, in order to minimize response time while increasing bulk + * throughput. + * NOTE: This function is called only when operating in a multiqueue + * receive environment. + */ +static void igc_update_ring_itr(struct igc_q_vector *q_vector) +{ + struct igc_adapter *adapter = q_vector->adapter; + int new_val = q_vector->itr_val; + int avg_wire_size = 0; + unsigned int packets; + + /* For non-gigabit speeds, just fix the interrupt rate at 4000 + * ints/sec - ITR timer value of 120 ticks. + */ + switch (adapter->link_speed) { + case SPEED_10: + case SPEED_100: + new_val = IGC_4K_ITR; + goto set_itr_val; + default: + break; + } + + packets = q_vector->rx.total_packets; + if (packets) + avg_wire_size = q_vector->rx.total_bytes / packets; + + packets = q_vector->tx.total_packets; + if (packets) + avg_wire_size = max_t(u32, avg_wire_size, + q_vector->tx.total_bytes / packets); + + /* if avg_wire_size isn't set no work was done */ + if (!avg_wire_size) + goto clear_counts; + + /* Add 24 bytes to size to account for CRC, preamble, and gap */ + avg_wire_size += 24; + + /* Don't starve jumbo frames */ + avg_wire_size = min(avg_wire_size, 3000); + + /* Give a little boost to mid-size frames */ + if (avg_wire_size > 300 && avg_wire_size < 1200) + new_val = avg_wire_size / 3; + else + new_val = avg_wire_size / 2; + + /* conservative mode (itr 3) eliminates the lowest_latency setting */ + if (new_val < IGC_20K_ITR && + ((q_vector->rx.ring && adapter->rx_itr_setting == 3) || + (!q_vector->rx.ring && adapter->tx_itr_setting == 3))) + new_val = IGC_20K_ITR; + +set_itr_val: + if (new_val != q_vector->itr_val) { + q_vector->itr_val = new_val; + q_vector->set_itr = 1; + } +clear_counts: + q_vector->rx.total_bytes = 0; + q_vector->rx.total_packets = 0; + q_vector->tx.total_bytes = 0; + q_vector->tx.total_packets = 0; +} + +/** + * igc_update_itr - update the dynamic ITR value based on statistics + * @q_vector: pointer to q_vector + * @ring_container: ring info to update the itr for + * + * Stores a new ITR value based on packets and byte + * counts during the last interrupt. The advantage of per interrupt + * computation is faster updates and more accurate ITR for the current + * traffic pattern. Constants in this function were computed + * based on theoretical maximum wire speed and thresholds were set based + * on testing data as well as attempting to minimize response time + * while increasing bulk throughput. + * NOTE: These calculations are only valid when operating in a single- + * queue environment. + */ +static void igc_update_itr(struct igc_q_vector *q_vector, + struct igc_ring_container *ring_container) +{ + unsigned int packets = ring_container->total_packets; + unsigned int bytes = ring_container->total_bytes; + u8 itrval = ring_container->itr; + + /* no packets, exit with status unchanged */ + if (packets == 0) + return; + + switch (itrval) { + case lowest_latency: + /* handle TSO and jumbo frames */ + if (bytes / packets > 8000) + itrval = bulk_latency; + else if ((packets < 5) && (bytes > 512)) + itrval = low_latency; + break; + case low_latency: /* 50 usec aka 20000 ints/s */ + if (bytes > 10000) { + /* this if handles the TSO accounting */ + if (bytes / packets > 8000) + itrval = bulk_latency; + else if ((packets < 10) || ((bytes / packets) > 1200)) + itrval = bulk_latency; + else if ((packets > 35)) + itrval = lowest_latency; + } else if (bytes / packets > 2000) { + itrval = bulk_latency; + } else if (packets <= 2 && bytes < 512) { + itrval = lowest_latency; + } + break; + case bulk_latency: /* 250 usec aka 4000 ints/s */ + if (bytes > 25000) { + if (packets > 35) + itrval = low_latency; + } else if (bytes < 1500) { + itrval = low_latency; + } + break; + } + + /* clear work counters since we have the values we need */ + ring_container->total_bytes = 0; + ring_container->total_packets = 0; + + /* write updated itr to ring container */ + ring_container->itr = itrval; +} + +/** + * igc_intr_msi - Interrupt Handler + * @irq: interrupt number + * @data: pointer to a network interface device structure + */ +static irqreturn_t igc_intr_msi(int irq, void *data) +{ + struct igc_adapter *adapter = data; + struct igc_q_vector *q_vector = adapter->q_vector[0]; + struct igc_hw *hw = &adapter->hw; + /* read ICR disables interrupts using IAM */ + u32 icr = rd32(IGC_ICR); + + igc_write_itr(q_vector); + + if (icr & IGC_ICR_DRSTA) + schedule_work(&adapter->reset_task); + + if (icr & IGC_ICR_DOUTSYNC) { + /* HW is reporting DMA is out of sync */ + adapter->stats.doosync++; + } + + if (icr & (IGC_ICR_RXSEQ | IGC_ICR_LSC)) { + hw->mac.get_link_status = 1; + if (!test_bit(__IGC_DOWN, &adapter->state)) + mod_timer(&adapter->watchdog_timer, jiffies + 1); + } + + napi_schedule(&q_vector->napi); + + return IRQ_HANDLED; +} + +/** + * igc_intr - Legacy Interrupt Handler + * @irq: interrupt number + * @data: pointer to a network interface device structure + */ +static irqreturn_t igc_intr(int irq, void *data) +{ + struct igc_adapter *adapter = data; + struct igc_q_vector *q_vector = adapter->q_vector[0]; + struct igc_hw *hw = &adapter->hw; + /* Interrupt Auto-Mask...upon reading ICR, interrupts are masked. No + * need for the IMC write + */ + u32 icr = rd32(IGC_ICR); + + /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is + * not set, then the adapter didn't send an interrupt + */ + if (!(icr & IGC_ICR_INT_ASSERTED)) + return IRQ_NONE; + + igc_write_itr(q_vector); + + if (icr & IGC_ICR_DRSTA) + schedule_work(&adapter->reset_task); + + if (icr & IGC_ICR_DOUTSYNC) { + /* HW is reporting DMA is out of sync */ + adapter->stats.doosync++; + } + + if (icr & (IGC_ICR_RXSEQ | IGC_ICR_LSC)) { + hw->mac.get_link_status = 1; + /* guard against interrupt when we're going down */ + if (!test_bit(__IGC_DOWN, &adapter->state)) + mod_timer(&adapter->watchdog_timer, jiffies + 1); + } + + napi_schedule(&q_vector->napi); + + return IRQ_HANDLED; +} + +static void igc_set_itr(struct igc_q_vector *q_vector) +{ + struct igc_adapter *adapter = q_vector->adapter; + u32 new_itr = q_vector->itr_val; + u8 current_itr = 0; + + /* for non-gigabit speeds, just fix the interrupt rate at 4000 */ + switch (adapter->link_speed) { + case SPEED_10: + case SPEED_100: + current_itr = 0; + new_itr = IGC_4K_ITR; + goto set_itr_now; + default: + break; + } + + igc_update_itr(q_vector, &q_vector->tx); + igc_update_itr(q_vector, &q_vector->rx); + + current_itr = max(q_vector->rx.itr, q_vector->tx.itr); + + /* conservative mode (itr 3) eliminates the lowest_latency setting */ + if (current_itr == lowest_latency && + ((q_vector->rx.ring && adapter->rx_itr_setting == 3) || + (!q_vector->rx.ring && adapter->tx_itr_setting == 3))) + current_itr = low_latency; + + switch (current_itr) { + /* counts and packets in update_itr are dependent on these numbers */ + case lowest_latency: + new_itr = IGC_70K_ITR; /* 70,000 ints/sec */ + break; + case low_latency: + new_itr = IGC_20K_ITR; /* 20,000 ints/sec */ + break; + case bulk_latency: + new_itr = IGC_4K_ITR; /* 4,000 ints/sec */ + break; + default: + break; + } + +set_itr_now: + if (new_itr != q_vector->itr_val) { + /* this attempts to bias the interrupt rate towards Bulk + * by adding intermediate steps when interrupt rate is + * increasing + */ + new_itr = new_itr > q_vector->itr_val ? + max((new_itr * q_vector->itr_val) / + (new_itr + (q_vector->itr_val >> 2)), + new_itr) : new_itr; + /* Don't write the value here; it resets the adapter's + * internal timer, and causes us to delay far longer than + * we should between interrupts. Instead, we write the ITR + * value at the beginning of the next interrupt so the timing + * ends up being correct. + */ + q_vector->itr_val = new_itr; + q_vector->set_itr = 1; + } +} + +static void igc_ring_irq_enable(struct igc_q_vector *q_vector) +{ + struct igc_adapter *adapter = q_vector->adapter; + struct igc_hw *hw = &adapter->hw; + + if ((q_vector->rx.ring && (adapter->rx_itr_setting & 3)) || + (!q_vector->rx.ring && (adapter->tx_itr_setting & 3))) { + if (adapter->num_q_vectors == 1) + igc_set_itr(q_vector); + else + igc_update_ring_itr(q_vector); + } + + if (!test_bit(__IGC_DOWN, &adapter->state)) { + if (adapter->msix_entries) + wr32(IGC_EIMS, q_vector->eims_value); + else + igc_irq_enable(adapter); + } +} + +/** + * igc_poll - NAPI Rx polling callback + * @napi: napi polling structure + * @budget: count of how many packets we should handle + */ +static int igc_poll(struct napi_struct *napi, int budget) +{ + struct igc_q_vector *q_vector = container_of(napi, + struct igc_q_vector, + napi); + bool clean_complete = true; + int work_done = 0; + + if (q_vector->tx.ring) + clean_complete = igc_clean_tx_irq(q_vector, budget); + + if (q_vector->rx.ring) { + int cleaned = igc_clean_rx_irq(q_vector, budget); + + work_done += cleaned; + if (cleaned >= budget) + clean_complete = false; + } + + /* If all work not completed, return budget and keep polling */ + if (!clean_complete) + return budget; + + /* If not enough Rx work done, exit the polling mode */ + napi_complete_done(napi, work_done); + igc_ring_irq_enable(q_vector); + + return 0; +} + +/** + * igc_set_interrupt_capability - set MSI or MSI-X if supported + * @adapter: Pointer to adapter structure + * + * Attempt to configure interrupts using the best available + * capabilities of the hardware and kernel. + */ +static void igc_set_interrupt_capability(struct igc_adapter *adapter, + bool msix) +{ + int numvecs, i; + int err; + + if (!msix) + goto msi_only; + adapter->flags |= IGC_FLAG_HAS_MSIX; + + /* Number of supported queues. */ + adapter->num_rx_queues = adapter->rss_queues; + + adapter->num_tx_queues = adapter->rss_queues; + + /* start with one vector for every Rx queue */ + numvecs = adapter->num_rx_queues; + + /* if Tx handler is separate add 1 for every Tx queue */ + if (!(adapter->flags & IGC_FLAG_QUEUE_PAIRS)) + numvecs += adapter->num_tx_queues; + + /* store the number of vectors reserved for queues */ + adapter->num_q_vectors = numvecs; + + /* add 1 vector for link status interrupts */ + numvecs++; + + adapter->msix_entries = kcalloc(numvecs, sizeof(struct msix_entry), + GFP_KERNEL); + + if (!adapter->msix_entries) + return; + + /* populate entry values */ + for (i = 0; i < numvecs; i++) + adapter->msix_entries[i].entry = i; + + err = pci_enable_msix_range(adapter->pdev, + adapter->msix_entries, + numvecs, + numvecs); + if (err > 0) + return; + + kfree(adapter->msix_entries); + adapter->msix_entries = NULL; + + igc_reset_interrupt_capability(adapter); + +msi_only: + adapter->flags &= ~IGC_FLAG_HAS_MSIX; + + adapter->rss_queues = 1; + adapter->flags |= IGC_FLAG_QUEUE_PAIRS; + adapter->num_rx_queues = 1; + adapter->num_tx_queues = 1; + adapter->num_q_vectors = 1; + if (!pci_enable_msi(adapter->pdev)) + adapter->flags |= IGC_FLAG_HAS_MSI; +} + +static void igc_add_ring(struct igc_ring *ring, + struct igc_ring_container *head) +{ + head->ring = ring; + head->count++; +} + +/** + * igc_alloc_q_vector - Allocate memory for a single interrupt vector + * @adapter: board private structure to initialize + * @v_count: q_vectors allocated on adapter, used for ring interleaving + * @v_idx: index of vector in adapter struct + * @txr_count: total number of Tx rings to allocate + * @txr_idx: index of first Tx ring to allocate + * @rxr_count: total number of Rx rings to allocate + * @rxr_idx: index of first Rx ring to allocate + * + * We allocate one q_vector. If allocation fails we return -ENOMEM. + */ +static int igc_alloc_q_vector(struct igc_adapter *adapter, + unsigned int v_count, unsigned int v_idx, + unsigned int txr_count, unsigned int txr_idx, + unsigned int rxr_count, unsigned int rxr_idx) +{ + struct igc_q_vector *q_vector; + struct igc_ring *ring; + int ring_count, size; + + /* igc only supports 1 Tx and/or 1 Rx queue per vector */ + if (txr_count > 1 || rxr_count > 1) + return -ENOMEM; + + ring_count = txr_count + rxr_count; + size = sizeof(struct igc_q_vector) + + (sizeof(struct igc_ring) * ring_count); + + /* allocate q_vector and rings */ + q_vector = adapter->q_vector[v_idx]; + if (!q_vector) + q_vector = kzalloc(size, GFP_KERNEL); + else + memset(q_vector, 0, size); + if (!q_vector) + return -ENOMEM; + + /* initialize NAPI */ + netif_napi_add(adapter->netdev, &q_vector->napi, + igc_poll, 64); + + /* tie q_vector and adapter together */ + adapter->q_vector[v_idx] = q_vector; + q_vector->adapter = adapter; + + /* initialize work limits */ + q_vector->tx.work_limit = adapter->tx_work_limit; + + /* initialize ITR configuration */ + q_vector->itr_register = adapter->io_addr + IGC_EITR(0); + q_vector->itr_val = IGC_START_ITR; + + /* initialize pointer to rings */ + ring = q_vector->ring; + + /* initialize ITR */ + if (rxr_count) { + /* rx or rx/tx vector */ + if (!adapter->rx_itr_setting || adapter->rx_itr_setting > 3) + q_vector->itr_val = adapter->rx_itr_setting; + } else { + /* tx only vector */ + if (!adapter->tx_itr_setting || adapter->tx_itr_setting > 3) + q_vector->itr_val = adapter->tx_itr_setting; + } + + if (txr_count) { + /* assign generic ring traits */ + ring->dev = &adapter->pdev->dev; + ring->netdev = adapter->netdev; + + /* configure backlink on ring */ + ring->q_vector = q_vector; + + /* update q_vector Tx values */ + igc_add_ring(ring, &q_vector->tx); + + /* apply Tx specific ring traits */ + ring->count = adapter->tx_ring_count; + ring->queue_index = txr_idx; + + /* assign ring to adapter */ + adapter->tx_ring[txr_idx] = ring; + + /* push pointer to next ring */ + ring++; + } + + if (rxr_count) { + /* assign generic ring traits */ + ring->dev = &adapter->pdev->dev; + ring->netdev = adapter->netdev; + + /* configure backlink on ring */ + ring->q_vector = q_vector; + + /* update q_vector Rx values */ + igc_add_ring(ring, &q_vector->rx); + + /* apply Rx specific ring traits */ + ring->count = adapter->rx_ring_count; + ring->queue_index = rxr_idx; + + /* assign ring to adapter */ + adapter->rx_ring[rxr_idx] = ring; + } + + return 0; +} + +/** + * igc_alloc_q_vectors - Allocate memory for interrupt vectors + * @adapter: board private structure to initialize + * + * We allocate one q_vector per queue interrupt. If allocation fails we + * return -ENOMEM. + */ +static int igc_alloc_q_vectors(struct igc_adapter *adapter) +{ + int rxr_remaining = adapter->num_rx_queues; + int txr_remaining = adapter->num_tx_queues; + int rxr_idx = 0, txr_idx = 0, v_idx = 0; + int q_vectors = adapter->num_q_vectors; + int err; + + if (q_vectors >= (rxr_remaining + txr_remaining)) { + for (; rxr_remaining; v_idx++) { + err = igc_alloc_q_vector(adapter, q_vectors, v_idx, + 0, 0, 1, rxr_idx); + + if (err) + goto err_out; + + /* update counts and index */ + rxr_remaining--; + rxr_idx++; + } + } + + for (; v_idx < q_vectors; v_idx++) { + int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - v_idx); + int tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - v_idx); + + err = igc_alloc_q_vector(adapter, q_vectors, v_idx, + tqpv, txr_idx, rqpv, rxr_idx); + + if (err) + goto err_out; + + /* update counts and index */ + rxr_remaining -= rqpv; + txr_remaining -= tqpv; + rxr_idx++; + txr_idx++; + } + + return 0; + +err_out: + adapter->num_tx_queues = 0; + adapter->num_rx_queues = 0; + adapter->num_q_vectors = 0; + + while (v_idx--) + igc_free_q_vector(adapter, v_idx); + + return -ENOMEM; +} + +/** + * igc_cache_ring_register - Descriptor ring to register mapping + * @adapter: board private structure to initialize + * + * Once we know the feature-set enabled for the device, we'll cache + * the register offset the descriptor ring is assigned to. + */ +static void igc_cache_ring_register(struct igc_adapter *adapter) +{ + int i = 0, j = 0; + + switch (adapter->hw.mac.type) { + case igc_i225: + /* Fall through */ + default: + for (; i < adapter->num_rx_queues; i++) + adapter->rx_ring[i]->reg_idx = i; + for (; j < adapter->num_tx_queues; j++) + adapter->tx_ring[j]->reg_idx = j; + break; + } +} + +/** + * igc_init_interrupt_scheme - initialize interrupts, allocate queues/vectors + * @adapter: Pointer to adapter structure + * + * This function initializes the interrupts and allocates all of the queues. + */ +static int igc_init_interrupt_scheme(struct igc_adapter *adapter, bool msix) +{ + struct pci_dev *pdev = adapter->pdev; + int err = 0; + + igc_set_interrupt_capability(adapter, msix); + + err = igc_alloc_q_vectors(adapter); + if (err) { + dev_err(&pdev->dev, "Unable to allocate memory for vectors\n"); + goto err_alloc_q_vectors; + } + + igc_cache_ring_register(adapter); + + return 0; + +err_alloc_q_vectors: + igc_reset_interrupt_capability(adapter); + return err; +} + +static void igc_free_irq(struct igc_adapter *adapter) +{ + if (adapter->msix_entries) { + int vector = 0, i; + + free_irq(adapter->msix_entries[vector++].vector, adapter); + + for (i = 0; i < adapter->num_q_vectors; i++) + free_irq(adapter->msix_entries[vector++].vector, + adapter->q_vector[i]); + } else { + free_irq(adapter->pdev->irq, adapter); + } +} + +/** + * igc_irq_disable - Mask off interrupt generation on the NIC + * @adapter: board private structure + */ +static void igc_irq_disable(struct igc_adapter *adapter) +{ + struct igc_hw *hw = &adapter->hw; + + if (adapter->msix_entries) { + u32 regval = rd32(IGC_EIAM); + + wr32(IGC_EIAM, regval & ~adapter->eims_enable_mask); + wr32(IGC_EIMC, adapter->eims_enable_mask); + regval = rd32(IGC_EIAC); + wr32(IGC_EIAC, regval & ~adapter->eims_enable_mask); + } + + wr32(IGC_IAM, 0); + wr32(IGC_IMC, ~0); + wrfl(); + + if (adapter->msix_entries) { + int vector = 0, i; + + synchronize_irq(adapter->msix_entries[vector++].vector); + + for (i = 0; i < adapter->num_q_vectors; i++) + synchronize_irq(adapter->msix_entries[vector++].vector); + } else { + synchronize_irq(adapter->pdev->irq); + } +} + +/** + * igc_irq_enable - Enable default interrupt generation settings + * @adapter: board private structure + */ +static void igc_irq_enable(struct igc_adapter *adapter) +{ + struct igc_hw *hw = &adapter->hw; + + if (adapter->msix_entries) { + u32 ims = IGC_IMS_LSC | IGC_IMS_DOUTSYNC | IGC_IMS_DRSTA; + u32 regval = rd32(IGC_EIAC); + + wr32(IGC_EIAC, regval | adapter->eims_enable_mask); + regval = rd32(IGC_EIAM); + wr32(IGC_EIAM, regval | adapter->eims_enable_mask); + wr32(IGC_EIMS, adapter->eims_enable_mask); + wr32(IGC_IMS, ims); + } else { + wr32(IGC_IMS, IMS_ENABLE_MASK | IGC_IMS_DRSTA); + wr32(IGC_IAM, IMS_ENABLE_MASK | IGC_IMS_DRSTA); + } +} + +/** + * igc_request_irq - initialize interrupts + * @adapter: Pointer to adapter structure + * + * Attempts to configure interrupts using the best available + * capabilities of the hardware and kernel. + */ +static int igc_request_irq(struct igc_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + struct pci_dev *pdev = adapter->pdev; + int err = 0; + + if (adapter->flags & IGC_FLAG_HAS_MSIX) { + err = igc_request_msix(adapter); + if (!err) + goto request_done; + /* fall back to MSI */ + igc_free_all_tx_resources(adapter); + igc_free_all_rx_resources(adapter); + + igc_clear_interrupt_scheme(adapter); + err = igc_init_interrupt_scheme(adapter, false); + if (err) + goto request_done; + igc_setup_all_tx_resources(adapter); + igc_setup_all_rx_resources(adapter); + igc_configure(adapter); + } + + igc_assign_vector(adapter->q_vector[0], 0); + + if (adapter->flags & IGC_FLAG_HAS_MSI) { + err = request_irq(pdev->irq, &igc_intr_msi, 0, + netdev->name, adapter); + if (!err) + goto request_done; + + /* fall back to legacy interrupts */ + igc_reset_interrupt_capability(adapter); + adapter->flags &= ~IGC_FLAG_HAS_MSI; + } + + err = request_irq(pdev->irq, &igc_intr, IRQF_SHARED, + netdev->name, adapter); + + if (err) + dev_err(&pdev->dev, "Error %d getting interrupt\n", + err); + +request_done: + return err; +} + +static void igc_write_itr(struct igc_q_vector *q_vector) +{ + u32 itr_val = q_vector->itr_val & IGC_QVECTOR_MASK; + + if (!q_vector->set_itr) + return; + + if (!itr_val) + itr_val = IGC_ITR_VAL_MASK; + + itr_val |= IGC_EITR_CNT_IGNR; + + writel(itr_val, q_vector->itr_register); + q_vector->set_itr = 0; +} + +/** + * igc_open - Called when a network interface is made active + * @netdev: network interface device structure + * + * Returns 0 on success, negative value on failure + * + * The open entry point is called when a network interface is made + * active by the system (IFF_UP). At this point all resources needed + * for transmit and receive operations are allocated, the interrupt + * handler is registered with the OS, the watchdog timer is started, + * and the stack is notified that the interface is ready. + */ +static int __igc_open(struct net_device *netdev, bool resuming) +{ + struct igc_adapter *adapter = netdev_priv(netdev); + struct igc_hw *hw = &adapter->hw; + int err = 0; + int i = 0; + + /* disallow open during test */ + + if (test_bit(__IGC_TESTING, &adapter->state)) { + WARN_ON(resuming); + return -EBUSY; + } + + netif_carrier_off(netdev); + + /* allocate transmit descriptors */ + err = igc_setup_all_tx_resources(adapter); + if (err) + goto err_setup_tx; + + /* allocate receive descriptors */ + err = igc_setup_all_rx_resources(adapter); + if (err) + goto err_setup_rx; + + igc_power_up_link(adapter); + + igc_configure(adapter); + + err = igc_request_irq(adapter); + if (err) + goto err_req_irq; + + /* Notify the stack of the actual queue counts. */ + netif_set_real_num_tx_queues(netdev, adapter->num_tx_queues); + if (err) + goto err_set_queues; + + err = netif_set_real_num_rx_queues(netdev, adapter->num_rx_queues); + if (err) + goto err_set_queues; + + clear_bit(__IGC_DOWN, &adapter->state); + + for (i = 0; i < adapter->num_q_vectors; i++) + napi_enable(&adapter->q_vector[i]->napi); + + /* Clear any pending interrupts. */ + rd32(IGC_ICR); + igc_irq_enable(adapter); + + netif_tx_start_all_queues(netdev); + + /* start the watchdog. */ + hw->mac.get_link_status = 1; + schedule_work(&adapter->watchdog_task); + + return IGC_SUCCESS; + +err_set_queues: + igc_free_irq(adapter); +err_req_irq: + igc_release_hw_control(adapter); + igc_power_down_link(adapter); + igc_free_all_rx_resources(adapter); +err_setup_rx: + igc_free_all_tx_resources(adapter); +err_setup_tx: + igc_reset(adapter); + + return err; +} + +static int igc_open(struct net_device *netdev) +{ + return __igc_open(netdev, false); +} + +/** + * igc_close - Disables a network interface + * @netdev: network interface device structure + * + * Returns 0, this is not allowed to fail + * + * The close entry point is called when an interface is de-activated + * by the OS. The hardware is still under the driver's control, but + * needs to be disabled. A global MAC reset is issued to stop the + * hardware, and all transmit and receive resources are freed. + */ +static int __igc_close(struct net_device *netdev, bool suspending) +{ + struct igc_adapter *adapter = netdev_priv(netdev); + + WARN_ON(test_bit(__IGC_RESETTING, &adapter->state)); + + igc_down(adapter); + + igc_release_hw_control(adapter); + + igc_free_irq(adapter); + + igc_free_all_tx_resources(adapter); + igc_free_all_rx_resources(adapter); + + return 0; +} + +static int igc_close(struct net_device *netdev) +{ + if (netif_device_present(netdev) || netdev->dismantle) + return __igc_close(netdev, false); + return 0; +} + +static const struct net_device_ops igc_netdev_ops = { + .ndo_open = igc_open, + .ndo_stop = igc_close, + .ndo_start_xmit = igc_xmit_frame, + .ndo_set_mac_address = igc_set_mac, + .ndo_change_mtu = igc_change_mtu, + .ndo_get_stats = igc_get_stats, + .ndo_do_ioctl = igc_ioctl, +}; + +/* PCIe configuration access */ +void igc_read_pci_cfg(struct igc_hw *hw, u32 reg, u16 *value) +{ + struct igc_adapter *adapter = hw->back; + + pci_read_config_word(adapter->pdev, reg, value); +} + +void igc_write_pci_cfg(struct igc_hw *hw, u32 reg, u16 *value) +{ + struct igc_adapter *adapter = hw->back; + + pci_write_config_word(adapter->pdev, reg, *value); +} + +s32 igc_read_pcie_cap_reg(struct igc_hw *hw, u32 reg, u16 *value) +{ + struct igc_adapter *adapter = hw->back; + u16 cap_offset; + + cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP); + if (!cap_offset) + return -IGC_ERR_CONFIG; + + pci_read_config_word(adapter->pdev, cap_offset + reg, value); + + return IGC_SUCCESS; +} + +s32 igc_write_pcie_cap_reg(struct igc_hw *hw, u32 reg, u16 *value) +{ + struct igc_adapter *adapter = hw->back; + u16 cap_offset; + + cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP); + if (!cap_offset) + return -IGC_ERR_CONFIG; + + pci_write_config_word(adapter->pdev, cap_offset + reg, *value); + + return IGC_SUCCESS; +} + +u32 igc_rd32(struct igc_hw *hw, u32 reg) +{ + struct igc_adapter *igc = container_of(hw, struct igc_adapter, hw); + u8 __iomem *hw_addr = READ_ONCE(hw->hw_addr); + u32 value = 0; + + if (IGC_REMOVED(hw_addr)) + return ~value; + + value = readl(&hw_addr[reg]); + + /* reads should not return all F's */ + if (!(~value) && (!reg || !(~readl(hw_addr)))) { + struct net_device *netdev = igc->netdev; + + hw->hw_addr = NULL; + netif_device_detach(netdev); + netdev_err(netdev, "PCIe link lost, device now detached\n"); + } + + return value; +} + +/** + * igc_probe - Device Initialization Routine + * @pdev: PCI device information struct + * @ent: entry in igc_pci_tbl + * + * Returns 0 on success, negative on failure + * + * igc_probe initializes an adapter identified by a pci_dev structure. + * The OS initialization, configuring the adapter private structure, + * and a hardware reset occur. + */ +static int igc_probe(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + struct igc_adapter *adapter; + struct net_device *netdev; + struct igc_hw *hw; + const struct igc_info *ei = igc_info_tbl[ent->driver_data]; + int err, pci_using_dac; + + err = pci_enable_device_mem(pdev); + if (err) + return err; + + pci_using_dac = 0; + err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); + if (!err) { + err = dma_set_coherent_mask(&pdev->dev, + DMA_BIT_MASK(64)); + if (!err) + pci_using_dac = 1; + } else { + err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); + if (err) { + err = dma_set_coherent_mask(&pdev->dev, + DMA_BIT_MASK(32)); + if (err) { + IGC_ERR("Wrong DMA configuration, aborting\n"); + goto err_dma; + } + } + } + + err = pci_request_selected_regions(pdev, + pci_select_bars(pdev, + IORESOURCE_MEM), + igc_driver_name); + if (err) + goto err_pci_reg; + + pci_enable_pcie_error_reporting(pdev); + + pci_set_master(pdev); + + err = -ENOMEM; + netdev = alloc_etherdev_mq(sizeof(struct igc_adapter), + IGC_MAX_TX_QUEUES); + + if (!netdev) + goto err_alloc_etherdev; + + SET_NETDEV_DEV(netdev, &pdev->dev); + + pci_set_drvdata(pdev, netdev); + adapter = netdev_priv(netdev); + adapter->netdev = netdev; + adapter->pdev = pdev; + hw = &adapter->hw; + hw->back = adapter; + adapter->port_num = hw->bus.func; + adapter->msg_enable = GENMASK(debug - 1, 0); + + err = pci_save_state(pdev); + if (err) + goto err_ioremap; + + err = -EIO; + adapter->io_addr = ioremap(pci_resource_start(pdev, 0), + pci_resource_len(pdev, 0)); + if (!adapter->io_addr) + goto err_ioremap; + + /* hw->hw_addr can be zeroed, so use adapter->io_addr for unmap */ + hw->hw_addr = adapter->io_addr; + + netdev->netdev_ops = &igc_netdev_ops; + + netdev->watchdog_timeo = 5 * HZ; + + netdev->mem_start = pci_resource_start(pdev, 0); + netdev->mem_end = pci_resource_end(pdev, 0); + + /* PCI config space info */ + hw->vendor_id = pdev->vendor; + hw->device_id = pdev->device; + hw->revision_id = pdev->revision; + hw->subsystem_vendor_id = pdev->subsystem_vendor; + hw->subsystem_device_id = pdev->subsystem_device; + + /* Copy the default MAC and PHY function pointers */ + memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops)); + memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops)); + + /* Initialize skew-specific constants */ + err = ei->get_invariants(hw); + if (err) + goto err_sw_init; + + /* setup the private structure */ + err = igc_sw_init(adapter); + if (err) + goto err_sw_init; + + /* MTU range: 68 - 9216 */ + netdev->min_mtu = ETH_MIN_MTU; + netdev->max_mtu = MAX_STD_JUMBO_FRAME_SIZE; + + /* before reading the NVM, reset the controller to put the device in a + * known good starting state + */ + hw->mac.ops.reset_hw(hw); + + if (eth_platform_get_mac_address(&pdev->dev, hw->mac.addr)) { + /* copy the MAC address out of the NVM */ + if (hw->mac.ops.read_mac_addr(hw)) + dev_err(&pdev->dev, "NVM Read Error\n"); + } + + memcpy(netdev->dev_addr, hw->mac.addr, netdev->addr_len); + + if (!is_valid_ether_addr(netdev->dev_addr)) { + dev_err(&pdev->dev, "Invalid MAC Address\n"); + err = -EIO; + goto err_eeprom; + } + + /* configure RXPBSIZE and TXPBSIZE */ + wr32(IGC_RXPBS, I225_RXPBSIZE_DEFAULT); + wr32(IGC_TXPBS, I225_TXPBSIZE_DEFAULT); + + timer_setup(&adapter->watchdog_timer, igc_watchdog, 0); + timer_setup(&adapter->phy_info_timer, igc_update_phy_info, 0); + + INIT_WORK(&adapter->reset_task, igc_reset_task); + INIT_WORK(&adapter->watchdog_task, igc_watchdog_task); + + /* Initialize link properties that are user-changeable */ + adapter->fc_autoneg = true; + hw->mac.autoneg = true; + hw->phy.autoneg_advertised = 0xaf; + + hw->fc.requested_mode = igc_fc_default; + hw->fc.current_mode = igc_fc_default; + + /* reset the hardware with the new settings */ + igc_reset(adapter); + + /* let the f/w know that the h/w is now under the control of the + * driver. + */ + igc_get_hw_control(adapter); + + strncpy(netdev->name, "eth%d", IFNAMSIZ); + err = register_netdev(netdev); + if (err) + goto err_register; + + /* carrier off reporting is important to ethtool even BEFORE open */ + netif_carrier_off(netdev); + + /* Check if Media Autosense is enabled */ + adapter->ei = *ei; + + /* print pcie link status and MAC address */ + pcie_print_link_status(pdev); + netdev_info(netdev, "MAC: %pM\n", netdev->dev_addr); + + return 0; + +err_register: + igc_release_hw_control(adapter); +err_eeprom: + if (!igc_check_reset_block(hw)) + igc_reset_phy(hw); +err_sw_init: + igc_clear_interrupt_scheme(adapter); + iounmap(adapter->io_addr); +err_ioremap: + free_netdev(netdev); +err_alloc_etherdev: + pci_release_selected_regions(pdev, + pci_select_bars(pdev, IORESOURCE_MEM)); +err_pci_reg: +err_dma: + pci_disable_device(pdev); + return err; +} + +/** + * igc_remove - Device Removal Routine + * @pdev: PCI device information struct + * + * igc_remove is called by the PCI subsystem to alert the driver + * that it should release a PCI device. This could be caused by a + * Hot-Plug event, or because the driver is going to be removed from + * memory. + */ +static void igc_remove(struct pci_dev *pdev) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct igc_adapter *adapter = netdev_priv(netdev); + + set_bit(__IGC_DOWN, &adapter->state); + + del_timer_sync(&adapter->watchdog_timer); + del_timer_sync(&adapter->phy_info_timer); + + cancel_work_sync(&adapter->reset_task); + cancel_work_sync(&adapter->watchdog_task); + + /* Release control of h/w to f/w. If f/w is AMT enabled, this + * would have already happened in close and is redundant. + */ + igc_release_hw_control(adapter); + unregister_netdev(netdev); + + igc_clear_interrupt_scheme(adapter); + pci_iounmap(pdev, adapter->io_addr); + pci_release_mem_regions(pdev); + + kfree(adapter->mac_table); + kfree(adapter->shadow_vfta); + free_netdev(netdev); + + pci_disable_pcie_error_reporting(pdev); + + pci_disable_device(pdev); +} + +static struct pci_driver igc_driver = { + .name = igc_driver_name, + .id_table = igc_pci_tbl, + .probe = igc_probe, + .remove = igc_remove, +}; + +static void igc_set_flag_queue_pairs(struct igc_adapter *adapter, + const u32 max_rss_queues) +{ + /* Determine if we need to pair queues. */ + /* If rss_queues > half of max_rss_queues, pair the queues in + * order to conserve interrupts due to limited supply. + */ + if (adapter->rss_queues > (max_rss_queues / 2)) + adapter->flags |= IGC_FLAG_QUEUE_PAIRS; + else + adapter->flags &= ~IGC_FLAG_QUEUE_PAIRS; +} + +static unsigned int igc_get_max_rss_queues(struct igc_adapter *adapter) +{ + unsigned int max_rss_queues; + + /* Determine the maximum number of RSS queues supported. */ + max_rss_queues = IGC_MAX_RX_QUEUES; + + return max_rss_queues; +} + +static void igc_init_queue_configuration(struct igc_adapter *adapter) +{ + u32 max_rss_queues; + + max_rss_queues = igc_get_max_rss_queues(adapter); + adapter->rss_queues = min_t(u32, max_rss_queues, num_online_cpus()); + + igc_set_flag_queue_pairs(adapter, max_rss_queues); +} + +/** + * igc_sw_init - Initialize general software structures (struct igc_adapter) + * @adapter: board private structure to initialize + * + * igc_sw_init initializes the Adapter private data structure. + * Fields are initialized based on PCI device information and + * OS network device settings (MTU size). + */ +static int igc_sw_init(struct igc_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + struct pci_dev *pdev = adapter->pdev; + struct igc_hw *hw = &adapter->hw; + + int size = sizeof(struct igc_mac_addr) * hw->mac.rar_entry_count; + + pci_read_config_word(pdev, PCI_COMMAND, &hw->bus.pci_cmd_word); + + /* set default ring sizes */ + adapter->tx_ring_count = IGC_DEFAULT_TXD; + adapter->rx_ring_count = IGC_DEFAULT_RXD; + + /* set default ITR values */ + adapter->rx_itr_setting = IGC_DEFAULT_ITR; + adapter->tx_itr_setting = IGC_DEFAULT_ITR; + + /* set default work limits */ + adapter->tx_work_limit = IGC_DEFAULT_TX_WORK; + + /* adjust max frame to be at least the size of a standard frame */ + adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN + + VLAN_HLEN; + adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN; + + spin_lock_init(&adapter->nfc_lock); + spin_lock_init(&adapter->stats64_lock); + /* Assume MSI-X interrupts, will be checked during IRQ allocation */ + adapter->flags |= IGC_FLAG_HAS_MSIX; + + adapter->mac_table = kzalloc(size, GFP_ATOMIC); + if (!adapter->mac_table) + return -ENOMEM; + + igc_init_queue_configuration(adapter); + + /* This call may decrease the number of queues */ + if (igc_init_interrupt_scheme(adapter, true)) { + dev_err(&pdev->dev, "Unable to allocate memory for queues\n"); + return -ENOMEM; + } + + /* Explicitly disable IRQ since the NIC can be in any state. */ + igc_irq_disable(adapter); + + set_bit(__IGC_DOWN, &adapter->state); + + return 0; +} + +/** + * igc_get_hw_dev - return device + * @hw: pointer to hardware structure + * + * used by hardware layer to print debugging information + */ +struct net_device *igc_get_hw_dev(struct igc_hw *hw) +{ + struct igc_adapter *adapter = hw->back; + + return adapter->netdev; +} + +/** + * igc_init_module - Driver Registration Routine + * + * igc_init_module is the first routine called when the driver is + * loaded. All it does is register with the PCI subsystem. + */ +static int __init igc_init_module(void) +{ + int ret; + + pr_info("%s - version %s\n", + igc_driver_string, igc_driver_version); + + pr_info("%s\n", igc_copyright); + + ret = pci_register_driver(&igc_driver); + return ret; +} + +module_init(igc_init_module); + +/** + * igc_exit_module - Driver Exit Cleanup Routine + * + * igc_exit_module is called just before the driver is removed + * from memory. + */ +static void __exit igc_exit_module(void) +{ + pci_unregister_driver(&igc_driver); +} + +module_exit(igc_exit_module); +/* igc_main.c */ diff --git a/drivers/net/ethernet/intel/igc/igc_nvm.c b/drivers/net/ethernet/intel/igc/igc_nvm.c new file mode 100644 index 000000000000..58f81aba0144 --- /dev/null +++ b/drivers/net/ethernet/intel/igc/igc_nvm.c @@ -0,0 +1,215 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2018 Intel Corporation */ + +#include "igc_mac.h" +#include "igc_nvm.h" + +/** + * igc_poll_eerd_eewr_done - Poll for EEPROM read/write completion + * @hw: pointer to the HW structure + * @ee_reg: EEPROM flag for polling + * + * Polls the EEPROM status bit for either read or write completion based + * upon the value of 'ee_reg'. + */ +static s32 igc_poll_eerd_eewr_done(struct igc_hw *hw, int ee_reg) +{ + s32 ret_val = -IGC_ERR_NVM; + u32 attempts = 100000; + u32 i, reg = 0; + + for (i = 0; i < attempts; i++) { + if (ee_reg == IGC_NVM_POLL_READ) + reg = rd32(IGC_EERD); + else + reg = rd32(IGC_EEWR); + + if (reg & IGC_NVM_RW_REG_DONE) { + ret_val = 0; + break; + } + + udelay(5); + } + + return ret_val; +} + +/** + * igc_acquire_nvm - Generic request for access to EEPROM + * @hw: pointer to the HW structure + * + * Set the EEPROM access request bit and wait for EEPROM access grant bit. + * Return successful if access grant bit set, else clear the request for + * EEPROM access and return -IGC_ERR_NVM (-1). + */ +s32 igc_acquire_nvm(struct igc_hw *hw) +{ + s32 timeout = IGC_NVM_GRANT_ATTEMPTS; + u32 eecd = rd32(IGC_EECD); + s32 ret_val = 0; + + wr32(IGC_EECD, eecd | IGC_EECD_REQ); + eecd = rd32(IGC_EECD); + + while (timeout) { + if (eecd & IGC_EECD_GNT) + break; + udelay(5); + eecd = rd32(IGC_EECD); + timeout--; + } + + if (!timeout) { + eecd &= ~IGC_EECD_REQ; + wr32(IGC_EECD, eecd); + hw_dbg("Could not acquire NVM grant\n"); + ret_val = -IGC_ERR_NVM; + } + + return ret_val; +} + +/** + * igc_release_nvm - Release exclusive access to EEPROM + * @hw: pointer to the HW structure + * + * Stop any current commands to the EEPROM and clear the EEPROM request bit. + */ +void igc_release_nvm(struct igc_hw *hw) +{ + u32 eecd; + + eecd = rd32(IGC_EECD); + eecd &= ~IGC_EECD_REQ; + wr32(IGC_EECD, eecd); +} + +/** + * igc_read_nvm_eerd - Reads EEPROM using EERD register + * @hw: pointer to the HW structure + * @offset: offset of word in the EEPROM to read + * @words: number of words to read + * @data: word read from the EEPROM + * + * Reads a 16 bit word from the EEPROM using the EERD register. + */ +s32 igc_read_nvm_eerd(struct igc_hw *hw, u16 offset, u16 words, u16 *data) +{ + struct igc_nvm_info *nvm = &hw->nvm; + u32 i, eerd = 0; + s32 ret_val = 0; + + /* A check for invalid values: offset too large, too many words, + * and not enough words. + */ + if (offset >= nvm->word_size || (words > (nvm->word_size - offset)) || + words == 0) { + hw_dbg("nvm parameter(s) out of bounds\n"); + ret_val = -IGC_ERR_NVM; + goto out; + } + + for (i = 0; i < words; i++) { + eerd = ((offset + i) << IGC_NVM_RW_ADDR_SHIFT) + + IGC_NVM_RW_REG_START; + + wr32(IGC_EERD, eerd); + ret_val = igc_poll_eerd_eewr_done(hw, IGC_NVM_POLL_READ); + if (ret_val) + break; + + data[i] = (rd32(IGC_EERD) >> IGC_NVM_RW_REG_DATA); + } + +out: + return ret_val; +} + +/** + * igc_read_mac_addr - Read device MAC address + * @hw: pointer to the HW structure + */ +s32 igc_read_mac_addr(struct igc_hw *hw) +{ + u32 rar_high; + u32 rar_low; + u16 i; + + rar_high = rd32(IGC_RAH(0)); + rar_low = rd32(IGC_RAL(0)); + + for (i = 0; i < IGC_RAL_MAC_ADDR_LEN; i++) + hw->mac.perm_addr[i] = (u8)(rar_low >> (i * 8)); + + for (i = 0; i < IGC_RAH_MAC_ADDR_LEN; i++) + hw->mac.perm_addr[i + 4] = (u8)(rar_high >> (i * 8)); + + for (i = 0; i < ETH_ALEN; i++) + hw->mac.addr[i] = hw->mac.perm_addr[i]; + + return 0; +} + +/** + * igc_validate_nvm_checksum - Validate EEPROM checksum + * @hw: pointer to the HW structure + * + * Calculates the EEPROM checksum by reading/adding each word of the EEPROM + * and then verifies that the sum of the EEPROM is equal to 0xBABA. + */ +s32 igc_validate_nvm_checksum(struct igc_hw *hw) +{ + u16 checksum = 0; + u16 i, nvm_data; + s32 ret_val = 0; + + for (i = 0; i < (NVM_CHECKSUM_REG + 1); i++) { + ret_val = hw->nvm.ops.read(hw, i, 1, &nvm_data); + if (ret_val) { + hw_dbg("NVM Read Error\n"); + goto out; + } + checksum += nvm_data; + } + + if (checksum != (u16)NVM_SUM) { + hw_dbg("NVM Checksum Invalid\n"); + ret_val = -IGC_ERR_NVM; + goto out; + } + +out: + return ret_val; +} + +/** + * igc_update_nvm_checksum - Update EEPROM checksum + * @hw: pointer to the HW structure + * + * Updates the EEPROM checksum by reading/adding each word of the EEPROM + * up to the checksum. Then calculates the EEPROM checksum and writes the + * value to the EEPROM. + */ +s32 igc_update_nvm_checksum(struct igc_hw *hw) +{ + u16 checksum = 0; + u16 i, nvm_data; + s32 ret_val; + + for (i = 0; i < NVM_CHECKSUM_REG; i++) { + ret_val = hw->nvm.ops.read(hw, i, 1, &nvm_data); + if (ret_val) { + hw_dbg("NVM Read Error while updating checksum.\n"); + goto out; + } + checksum += nvm_data; + } + checksum = (u16)NVM_SUM - checksum; + ret_val = hw->nvm.ops.write(hw, NVM_CHECKSUM_REG, 1, &checksum); + if (ret_val) + hw_dbg("NVM Write Error while updating checksum.\n"); + +out: + return ret_val; +} diff --git a/drivers/net/ethernet/intel/igc/igc_nvm.h b/drivers/net/ethernet/intel/igc/igc_nvm.h new file mode 100644 index 000000000000..f9fc2e9cfb03 --- /dev/null +++ b/drivers/net/ethernet/intel/igc/igc_nvm.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2018 Intel Corporation */ + +#ifndef _IGC_NVM_H_ +#define _IGC_NVM_H_ + +s32 igc_acquire_nvm(struct igc_hw *hw); +void igc_release_nvm(struct igc_hw *hw); +s32 igc_read_mac_addr(struct igc_hw *hw); +s32 igc_read_nvm_eerd(struct igc_hw *hw, u16 offset, u16 words, u16 *data); +s32 igc_validate_nvm_checksum(struct igc_hw *hw); +s32 igc_update_nvm_checksum(struct igc_hw *hw); + +#endif diff --git a/drivers/net/ethernet/intel/igc/igc_phy.c b/drivers/net/ethernet/intel/igc/igc_phy.c new file mode 100644 index 000000000000..38e43e6fc1c7 --- /dev/null +++ b/drivers/net/ethernet/intel/igc/igc_phy.c @@ -0,0 +1,791 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2018 Intel Corporation */ + +#include "igc_phy.h" + +/* forward declaration */ +static s32 igc_phy_setup_autoneg(struct igc_hw *hw); +static s32 igc_wait_autoneg(struct igc_hw *hw); + +/** + * igc_check_reset_block - Check if PHY reset is blocked + * @hw: pointer to the HW structure + * + * Read the PHY management control register and check whether a PHY reset + * is blocked. If a reset is not blocked return 0, otherwise + * return IGC_ERR_BLK_PHY_RESET (12). + */ +s32 igc_check_reset_block(struct igc_hw *hw) +{ + u32 manc; + + manc = rd32(IGC_MANC); + + return (manc & IGC_MANC_BLK_PHY_RST_ON_IDE) ? + IGC_ERR_BLK_PHY_RESET : 0; +} + +/** + * igc_get_phy_id - Retrieve the PHY ID and revision + * @hw: pointer to the HW structure + * + * Reads the PHY registers and stores the PHY ID and possibly the PHY + * revision in the hardware structure. + */ +s32 igc_get_phy_id(struct igc_hw *hw) +{ + struct igc_phy_info *phy = &hw->phy; + s32 ret_val = 0; + u16 phy_id; + + ret_val = phy->ops.read_reg(hw, PHY_ID1, &phy_id); + if (ret_val) + goto out; + + phy->id = (u32)(phy_id << 16); + usleep_range(200, 500); + ret_val = phy->ops.read_reg(hw, PHY_ID2, &phy_id); + if (ret_val) + goto out; + + phy->id |= (u32)(phy_id & PHY_REVISION_MASK); + phy->revision = (u32)(phy_id & ~PHY_REVISION_MASK); + +out: + return ret_val; +} + +/** + * igc_phy_has_link - Polls PHY for link + * @hw: pointer to the HW structure + * @iterations: number of times to poll for link + * @usec_interval: delay between polling attempts + * @success: pointer to whether polling was successful or not + * + * Polls the PHY status register for link, 'iterations' number of times. + */ +s32 igc_phy_has_link(struct igc_hw *hw, u32 iterations, + u32 usec_interval, bool *success) +{ + u16 i, phy_status; + s32 ret_val = 0; + + for (i = 0; i < iterations; i++) { + /* Some PHYs require the PHY_STATUS register to be read + * twice due to the link bit being sticky. No harm doing + * it across the board. + */ + ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status); + if (ret_val && usec_interval > 0) { + /* If the first read fails, another entity may have + * ownership of the resources, wait and try again to + * see if they have relinquished the resources yet. + */ + if (usec_interval >= 1000) + mdelay(usec_interval / 1000); + else + udelay(usec_interval); + } + ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status); + if (ret_val) + break; + if (phy_status & MII_SR_LINK_STATUS) + break; + if (usec_interval >= 1000) + mdelay(usec_interval / 1000); + else + udelay(usec_interval); + } + + *success = (i < iterations) ? true : false; + + return ret_val; +} + +/** + * igc_power_up_phy_copper - Restore copper link in case of PHY power down + * @hw: pointer to the HW structure + * + * In the case of a PHY power down to save power, or to turn off link during a + * driver unload, restore the link to previous settings. + */ +void igc_power_up_phy_copper(struct igc_hw *hw) +{ + u16 mii_reg = 0; + + /* The PHY will retain its settings across a power down/up cycle */ + hw->phy.ops.read_reg(hw, PHY_CONTROL, &mii_reg); + mii_reg &= ~MII_CR_POWER_DOWN; + hw->phy.ops.write_reg(hw, PHY_CONTROL, mii_reg); +} + +/** + * igc_power_down_phy_copper - Power down copper PHY + * @hw: pointer to the HW structure + * + * Power down PHY to save power when interface is down and wake on lan + * is not enabled. + */ +void igc_power_down_phy_copper(struct igc_hw *hw) +{ + u16 mii_reg = 0; + + /* The PHY will retain its settings across a power down/up cycle */ + hw->phy.ops.read_reg(hw, PHY_CONTROL, &mii_reg); + mii_reg |= MII_CR_POWER_DOWN; + + /* Temporary workaround - should be removed when PHY will implement + * IEEE registers as properly + */ + /* hw->phy.ops.write_reg(hw, PHY_CONTROL, mii_reg);*/ + usleep_range(1000, 2000); +} + +/** + * igc_check_downshift - Checks whether a downshift in speed occurred + * @hw: pointer to the HW structure + * + * Success returns 0, Failure returns 1 + * + * A downshift is detected by querying the PHY link health. + */ +s32 igc_check_downshift(struct igc_hw *hw) +{ + struct igc_phy_info *phy = &hw->phy; + u16 phy_data, offset, mask; + s32 ret_val; + + switch (phy->type) { + case igc_phy_i225: + default: + /* speed downshift not supported */ + phy->speed_downgraded = false; + ret_val = 0; + goto out; + } + + ret_val = phy->ops.read_reg(hw, offset, &phy_data); + + if (!ret_val) + phy->speed_downgraded = (phy_data & mask) ? true : false; + +out: + return ret_val; +} + +/** + * igc_phy_hw_reset - PHY hardware reset + * @hw: pointer to the HW structure + * + * Verify the reset block is not blocking us from resetting. Acquire + * semaphore (if necessary) and read/set/write the device control reset + * bit in the PHY. Wait the appropriate delay time for the device to + * reset and release the semaphore (if necessary). + */ +s32 igc_phy_hw_reset(struct igc_hw *hw) +{ + struct igc_phy_info *phy = &hw->phy; + s32 ret_val; + u32 ctrl; + + ret_val = igc_check_reset_block(hw); + if (ret_val) { + ret_val = 0; + goto out; + } + + ret_val = phy->ops.acquire(hw); + if (ret_val) + goto out; + + ctrl = rd32(IGC_CTRL); + wr32(IGC_CTRL, ctrl | IGC_CTRL_PHY_RST); + wrfl(); + + udelay(phy->reset_delay_us); + + wr32(IGC_CTRL, ctrl); + wrfl(); + + usleep_range(1500, 2000); + + phy->ops.release(hw); + +out: + return ret_val; +} + +/** + * igc_copper_link_autoneg - Setup/Enable autoneg for copper link + * @hw: pointer to the HW structure + * + * Performs initial bounds checking on autoneg advertisement parameter, then + * configure to advertise the full capability. Setup the PHY to autoneg + * and restart the negotiation process between the link partner. If + * autoneg_wait_to_complete, then wait for autoneg to complete before exiting. + */ +static s32 igc_copper_link_autoneg(struct igc_hw *hw) +{ + struct igc_phy_info *phy = &hw->phy; + u16 phy_ctrl; + s32 ret_val; + + /* Perform some bounds checking on the autoneg advertisement + * parameter. + */ + phy->autoneg_advertised &= phy->autoneg_mask; + + /* If autoneg_advertised is zero, we assume it was not defaulted + * by the calling code so we set to advertise full capability. + */ + if (phy->autoneg_advertised == 0) + phy->autoneg_advertised = phy->autoneg_mask; + + hw_dbg("Reconfiguring auto-neg advertisement params\n"); + ret_val = igc_phy_setup_autoneg(hw); + if (ret_val) { + hw_dbg("Error Setting up Auto-Negotiation\n"); + goto out; + } + hw_dbg("Restarting Auto-Neg\n"); + + /* Restart auto-negotiation by setting the Auto Neg Enable bit and + * the Auto Neg Restart bit in the PHY control register. + */ + ret_val = phy->ops.read_reg(hw, PHY_CONTROL, &phy_ctrl); + if (ret_val) + goto out; + + phy_ctrl |= (MII_CR_AUTO_NEG_EN | MII_CR_RESTART_AUTO_NEG); + ret_val = phy->ops.write_reg(hw, PHY_CONTROL, phy_ctrl); + if (ret_val) + goto out; + + /* Does the user want to wait for Auto-Neg to complete here, or + * check at a later time (for example, callback routine). + */ + if (phy->autoneg_wait_to_complete) { + ret_val = igc_wait_autoneg(hw); + if (ret_val) { + hw_dbg("Error while waiting for autoneg to complete\n"); + goto out; + } + } + + hw->mac.get_link_status = true; + +out: + return ret_val; +} + +/** + * igc_wait_autoneg - Wait for auto-neg completion + * @hw: pointer to the HW structure + * + * Waits for auto-negotiation to complete or for the auto-negotiation time + * limit to expire, which ever happens first. + */ +static s32 igc_wait_autoneg(struct igc_hw *hw) +{ + u16 i, phy_status; + s32 ret_val = 0; + + /* Break after autoneg completes or PHY_AUTO_NEG_LIMIT expires. */ + for (i = PHY_AUTO_NEG_LIMIT; i > 0; i--) { + ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status); + if (ret_val) + break; + ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status); + if (ret_val) + break; + if (phy_status & MII_SR_AUTONEG_COMPLETE) + break; + msleep(100); + } + + /* PHY_AUTO_NEG_TIME expiration doesn't guarantee auto-negotiation + * has completed. + */ + return ret_val; +} + +/** + * igc_phy_setup_autoneg - Configure PHY for auto-negotiation + * @hw: pointer to the HW structure + * + * Reads the MII auto-neg advertisement register and/or the 1000T control + * register and if the PHY is already setup for auto-negotiation, then + * return successful. Otherwise, setup advertisement and flow control to + * the appropriate values for the wanted auto-negotiation. + */ +static s32 igc_phy_setup_autoneg(struct igc_hw *hw) +{ + struct igc_phy_info *phy = &hw->phy; + u16 aneg_multigbt_an_ctrl = 0; + u16 mii_1000t_ctrl_reg = 0; + u16 mii_autoneg_adv_reg; + s32 ret_val; + + phy->autoneg_advertised &= phy->autoneg_mask; + + /* Read the MII Auto-Neg Advertisement Register (Address 4). */ + ret_val = phy->ops.read_reg(hw, PHY_AUTONEG_ADV, &mii_autoneg_adv_reg); + if (ret_val) + return ret_val; + + if (phy->autoneg_mask & ADVERTISE_1000_FULL) { + /* Read the MII 1000Base-T Control Register (Address 9). */ + ret_val = phy->ops.read_reg(hw, PHY_1000T_CTRL, + &mii_1000t_ctrl_reg); + if (ret_val) + return ret_val; + } + + if ((phy->autoneg_mask & ADVERTISE_2500_FULL) && + hw->phy.id == I225_I_PHY_ID) { + /* Read the MULTI GBT AN Control Register - reg 7.32 */ + ret_val = phy->ops.read_reg(hw, (STANDARD_AN_REG_MASK << + MMD_DEVADDR_SHIFT) | + ANEG_MULTIGBT_AN_CTRL, + &aneg_multigbt_an_ctrl); + + if (ret_val) + return ret_val; + } + + /* Need to parse both autoneg_advertised and fc and set up + * the appropriate PHY registers. First we will parse for + * autoneg_advertised software override. Since we can advertise + * a plethora of combinations, we need to check each bit + * individually. + */ + + /* First we clear all the 10/100 mb speed bits in the Auto-Neg + * Advertisement Register (Address 4) and the 1000 mb speed bits in + * the 1000Base-T Control Register (Address 9). + */ + mii_autoneg_adv_reg &= ~(NWAY_AR_100TX_FD_CAPS | + NWAY_AR_100TX_HD_CAPS | + NWAY_AR_10T_FD_CAPS | + NWAY_AR_10T_HD_CAPS); + mii_1000t_ctrl_reg &= ~(CR_1000T_HD_CAPS | CR_1000T_FD_CAPS); + + hw_dbg("autoneg_advertised %x\n", phy->autoneg_advertised); + + /* Do we want to advertise 10 Mb Half Duplex? */ + if (phy->autoneg_advertised & ADVERTISE_10_HALF) { + hw_dbg("Advertise 10mb Half duplex\n"); + mii_autoneg_adv_reg |= NWAY_AR_10T_HD_CAPS; + } + + /* Do we want to advertise 10 Mb Full Duplex? */ + if (phy->autoneg_advertised & ADVERTISE_10_FULL) { + hw_dbg("Advertise 10mb Full duplex\n"); + mii_autoneg_adv_reg |= NWAY_AR_10T_FD_CAPS; + } + + /* Do we want to advertise 100 Mb Half Duplex? */ + if (phy->autoneg_advertised & ADVERTISE_100_HALF) { + hw_dbg("Advertise 100mb Half duplex\n"); + mii_autoneg_adv_reg |= NWAY_AR_100TX_HD_CAPS; + } + + /* Do we want to advertise 100 Mb Full Duplex? */ + if (phy->autoneg_advertised & ADVERTISE_100_FULL) { + hw_dbg("Advertise 100mb Full duplex\n"); + mii_autoneg_adv_reg |= NWAY_AR_100TX_FD_CAPS; + } + + /* We do not allow the Phy to advertise 1000 Mb Half Duplex */ + if (phy->autoneg_advertised & ADVERTISE_1000_HALF) + hw_dbg("Advertise 1000mb Half duplex request denied!\n"); + + /* Do we want to advertise 1000 Mb Full Duplex? */ + if (phy->autoneg_advertised & ADVERTISE_1000_FULL) { + hw_dbg("Advertise 1000mb Full duplex\n"); + mii_1000t_ctrl_reg |= CR_1000T_FD_CAPS; + } + + /* We do not allow the Phy to advertise 2500 Mb Half Duplex */ + if (phy->autoneg_advertised & ADVERTISE_2500_HALF) + hw_dbg("Advertise 2500mb Half duplex request denied!\n"); + + /* Do we want to advertise 2500 Mb Full Duplex? */ + if (phy->autoneg_advertised & ADVERTISE_2500_FULL) { + hw_dbg("Advertise 2500mb Full duplex\n"); + aneg_multigbt_an_ctrl |= CR_2500T_FD_CAPS; + } else { + aneg_multigbt_an_ctrl &= ~CR_2500T_FD_CAPS; + } + + /* Check for a software override of the flow control settings, and + * setup the PHY advertisement registers accordingly. If + * auto-negotiation is enabled, then software will have to set the + * "PAUSE" bits to the correct value in the Auto-Negotiation + * Advertisement Register (PHY_AUTONEG_ADV) and re-start auto- + * negotiation. + * + * The possible values of the "fc" parameter are: + * 0: Flow control is completely disabled + * 1: Rx flow control is enabled (we can receive pause frames + * but not send pause frames). + * 2: Tx flow control is enabled (we can send pause frames + * but we do not support receiving pause frames). + * 3: Both Rx and Tx flow control (symmetric) are enabled. + * other: No software override. The flow control configuration + * in the EEPROM is used. + */ + switch (hw->fc.current_mode) { + case igc_fc_none: + /* Flow control (Rx & Tx) is completely disabled by a + * software over-ride. + */ + mii_autoneg_adv_reg &= ~(NWAY_AR_ASM_DIR | NWAY_AR_PAUSE); + break; + case igc_fc_rx_pause: + /* Rx Flow control is enabled, and Tx Flow control is + * disabled, by a software over-ride. + * + * Since there really isn't a way to advertise that we are + * capable of Rx Pause ONLY, we will advertise that we + * support both symmetric and asymmetric Rx PAUSE. Later + * (in igc_config_fc_after_link_up) we will disable the + * hw's ability to send PAUSE frames. + */ + mii_autoneg_adv_reg |= (NWAY_AR_ASM_DIR | NWAY_AR_PAUSE); + break; + case igc_fc_tx_pause: + /* Tx Flow control is enabled, and Rx Flow control is + * disabled, by a software over-ride. + */ + mii_autoneg_adv_reg |= NWAY_AR_ASM_DIR; + mii_autoneg_adv_reg &= ~NWAY_AR_PAUSE; + break; + case igc_fc_full: + /* Flow control (both Rx and Tx) is enabled by a software + * over-ride. + */ + mii_autoneg_adv_reg |= (NWAY_AR_ASM_DIR | NWAY_AR_PAUSE); + break; + default: + hw_dbg("Flow control param set incorrectly\n"); + return -IGC_ERR_CONFIG; + } + + ret_val = phy->ops.write_reg(hw, PHY_AUTONEG_ADV, mii_autoneg_adv_reg); + if (ret_val) + return ret_val; + + hw_dbg("Auto-Neg Advertising %x\n", mii_autoneg_adv_reg); + + if (phy->autoneg_mask & ADVERTISE_1000_FULL) + ret_val = phy->ops.write_reg(hw, PHY_1000T_CTRL, + mii_1000t_ctrl_reg); + + if ((phy->autoneg_mask & ADVERTISE_2500_FULL) && + hw->phy.id == I225_I_PHY_ID) + ret_val = phy->ops.write_reg(hw, + (STANDARD_AN_REG_MASK << + MMD_DEVADDR_SHIFT) | + ANEG_MULTIGBT_AN_CTRL, + aneg_multigbt_an_ctrl); + + return ret_val; +} + +/** + * igc_setup_copper_link - Configure copper link settings + * @hw: pointer to the HW structure + * + * Calls the appropriate function to configure the link for auto-neg or forced + * speed and duplex. Then we check for link, once link is established calls + * to configure collision distance and flow control are called. If link is + * not established, we return -IGC_ERR_PHY (-2). + */ +s32 igc_setup_copper_link(struct igc_hw *hw) +{ + s32 ret_val = 0; + bool link; + + if (hw->mac.autoneg) { + /* Setup autoneg and flow control advertisement and perform + * autonegotiation. + */ + ret_val = igc_copper_link_autoneg(hw); + if (ret_val) + goto out; + } else { + /* PHY will be set to 10H, 10F, 100H or 100F + * depending on user settings. + */ + hw_dbg("Forcing Speed and Duplex\n"); + ret_val = hw->phy.ops.force_speed_duplex(hw); + if (ret_val) { + hw_dbg("Error Forcing Speed and Duplex\n"); + goto out; + } + } + + /* Check link status. Wait up to 100 microseconds for link to become + * valid. + */ + ret_val = igc_phy_has_link(hw, COPPER_LINK_UP_LIMIT, 10, &link); + if (ret_val) + goto out; + + if (link) { + hw_dbg("Valid link established!!!\n"); + igc_config_collision_dist(hw); + ret_val = igc_config_fc_after_link_up(hw); + } else { + hw_dbg("Unable to establish link!!!\n"); + } + +out: + return ret_val; +} + +/** + * igc_read_phy_reg_mdic - Read MDI control register + * @hw: pointer to the HW structure + * @offset: register offset to be read + * @data: pointer to the read data + * + * Reads the MDI control register in the PHY at offset and stores the + * information read to data. + */ +static s32 igc_read_phy_reg_mdic(struct igc_hw *hw, u32 offset, u16 *data) +{ + struct igc_phy_info *phy = &hw->phy; + u32 i, mdic = 0; + s32 ret_val = 0; + + if (offset > MAX_PHY_REG_ADDRESS) { + hw_dbg("PHY Address %d is out of range\n", offset); + ret_val = -IGC_ERR_PARAM; + goto out; + } + + /* Set up Op-code, Phy Address, and register offset in the MDI + * Control register. The MAC will take care of interfacing with the + * PHY to retrieve the desired data. + */ + mdic = ((offset << IGC_MDIC_REG_SHIFT) | + (phy->addr << IGC_MDIC_PHY_SHIFT) | + (IGC_MDIC_OP_READ)); + + wr32(IGC_MDIC, mdic); + + /* Poll the ready bit to see if the MDI read completed + * Increasing the time out as testing showed failures with + * the lower time out + */ + for (i = 0; i < IGC_GEN_POLL_TIMEOUT; i++) { + usleep_range(500, 1000); + mdic = rd32(IGC_MDIC); + if (mdic & IGC_MDIC_READY) + break; + } + if (!(mdic & IGC_MDIC_READY)) { + hw_dbg("MDI Read did not complete\n"); + ret_val = -IGC_ERR_PHY; + goto out; + } + if (mdic & IGC_MDIC_ERROR) { + hw_dbg("MDI Error\n"); + ret_val = -IGC_ERR_PHY; + goto out; + } + *data = (u16)mdic; + +out: + return ret_val; +} + +/** + * igc_write_phy_reg_mdic - Write MDI control register + * @hw: pointer to the HW structure + * @offset: register offset to write to + * @data: data to write to register at offset + * + * Writes data to MDI control register in the PHY at offset. + */ +static s32 igc_write_phy_reg_mdic(struct igc_hw *hw, u32 offset, u16 data) +{ + struct igc_phy_info *phy = &hw->phy; + u32 i, mdic = 0; + s32 ret_val = 0; + + if (offset > MAX_PHY_REG_ADDRESS) { + hw_dbg("PHY Address %d is out of range\n", offset); + ret_val = -IGC_ERR_PARAM; + goto out; + } + + /* Set up Op-code, Phy Address, and register offset in the MDI + * Control register. The MAC will take care of interfacing with the + * PHY to write the desired data. + */ + mdic = (((u32)data) | + (offset << IGC_MDIC_REG_SHIFT) | + (phy->addr << IGC_MDIC_PHY_SHIFT) | + (IGC_MDIC_OP_WRITE)); + + wr32(IGC_MDIC, mdic); + + /* Poll the ready bit to see if the MDI read completed + * Increasing the time out as testing showed failures with + * the lower time out + */ + for (i = 0; i < IGC_GEN_POLL_TIMEOUT; i++) { + usleep_range(500, 1000); + mdic = rd32(IGC_MDIC); + if (mdic & IGC_MDIC_READY) + break; + } + if (!(mdic & IGC_MDIC_READY)) { + hw_dbg("MDI Write did not complete\n"); + ret_val = -IGC_ERR_PHY; + goto out; + } + if (mdic & IGC_MDIC_ERROR) { + hw_dbg("MDI Error\n"); + ret_val = -IGC_ERR_PHY; + goto out; + } + +out: + return ret_val; +} + +/** + * __igc_access_xmdio_reg - Read/write XMDIO register + * @hw: pointer to the HW structure + * @address: XMDIO address to program + * @dev_addr: device address to program + * @data: pointer to value to read/write from/to the XMDIO address + * @read: boolean flag to indicate read or write + */ +static s32 __igc_access_xmdio_reg(struct igc_hw *hw, u16 address, + u8 dev_addr, u16 *data, bool read) +{ + s32 ret_val; + + ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAC, dev_addr); + if (ret_val) + return ret_val; + + ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAAD, address); + if (ret_val) + return ret_val; + + ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAC, IGC_MMDAC_FUNC_DATA | + dev_addr); + if (ret_val) + return ret_val; + + if (read) + ret_val = hw->phy.ops.read_reg(hw, IGC_MMDAAD, data); + else + ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAAD, *data); + if (ret_val) + return ret_val; + + /* Recalibrate the device back to 0 */ + ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAC, 0); + if (ret_val) + return ret_val; + + return ret_val; +} + +/** + * igc_read_xmdio_reg - Read XMDIO register + * @hw: pointer to the HW structure + * @addr: XMDIO address to program + * @dev_addr: device address to program + * @data: value to be read from the EMI address + */ +static s32 igc_read_xmdio_reg(struct igc_hw *hw, u16 addr, + u8 dev_addr, u16 *data) +{ + return __igc_access_xmdio_reg(hw, addr, dev_addr, data, true); +} + +/** + * igc_write_xmdio_reg - Write XMDIO register + * @hw: pointer to the HW structure + * @addr: XMDIO address to program + * @dev_addr: device address to program + * @data: value to be written to the XMDIO address + */ +static s32 igc_write_xmdio_reg(struct igc_hw *hw, u16 addr, + u8 dev_addr, u16 data) +{ + return __igc_access_xmdio_reg(hw, addr, dev_addr, &data, false); +} + +/** + * igc_write_phy_reg_gpy - Write GPY PHY register + * @hw: pointer to the HW structure + * @offset: register offset to write to + * @data: data to write at register offset + * + * Acquires semaphore, if necessary, then writes the data to PHY register + * at the offset. Release any acquired semaphores before exiting. + */ +s32 igc_write_phy_reg_gpy(struct igc_hw *hw, u32 offset, u16 data) +{ + u8 dev_addr = (offset & GPY_MMD_MASK) >> GPY_MMD_SHIFT; + s32 ret_val; + + offset = offset & GPY_REG_MASK; + + if (!dev_addr) { + ret_val = hw->phy.ops.acquire(hw); + if (ret_val) + return ret_val; + ret_val = igc_write_phy_reg_mdic(hw, offset, data); + if (ret_val) + return ret_val; + hw->phy.ops.release(hw); + } else { + ret_val = igc_write_xmdio_reg(hw, (u16)offset, dev_addr, + data); + } + + return ret_val; +} + +/** + * igc_read_phy_reg_gpy - Read GPY PHY register + * @hw: pointer to the HW structure + * @offset: lower half is register offset to read to + * upper half is MMD to use. + * @data: data to read at register offset + * + * Acquires semaphore, if necessary, then reads the data in the PHY register + * at the offset. Release any acquired semaphores before exiting. + */ +s32 igc_read_phy_reg_gpy(struct igc_hw *hw, u32 offset, u16 *data) +{ + u8 dev_addr = (offset & GPY_MMD_MASK) >> GPY_MMD_SHIFT; + s32 ret_val; + + offset = offset & GPY_REG_MASK; + + if (!dev_addr) { + ret_val = hw->phy.ops.acquire(hw); + if (ret_val) + return ret_val; + ret_val = igc_read_phy_reg_mdic(hw, offset, data); + if (ret_val) + return ret_val; + hw->phy.ops.release(hw); + } else { + ret_val = igc_read_xmdio_reg(hw, (u16)offset, dev_addr, + data); + } + + return ret_val; +} diff --git a/drivers/net/ethernet/intel/igc/igc_phy.h b/drivers/net/ethernet/intel/igc/igc_phy.h new file mode 100644 index 000000000000..25cba33de7e2 --- /dev/null +++ b/drivers/net/ethernet/intel/igc/igc_phy.h @@ -0,0 +1,21 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2018 Intel Corporation */ + +#ifndef _IGC_PHY_H_ +#define _IGC_PHY_H_ + +#include "igc_mac.h" + +s32 igc_check_reset_block(struct igc_hw *hw); +s32 igc_phy_hw_reset(struct igc_hw *hw); +s32 igc_get_phy_id(struct igc_hw *hw); +s32 igc_phy_has_link(struct igc_hw *hw, u32 iterations, + u32 usec_interval, bool *success); +s32 igc_check_downshift(struct igc_hw *hw); +s32 igc_setup_copper_link(struct igc_hw *hw); +void igc_power_up_phy_copper(struct igc_hw *hw); +void igc_power_down_phy_copper(struct igc_hw *hw); +s32 igc_write_phy_reg_gpy(struct igc_hw *hw, u32 offset, u16 data); +s32 igc_read_phy_reg_gpy(struct igc_hw *hw, u32 offset, u16 *data); + +#endif diff --git a/drivers/net/ethernet/intel/igc/igc_regs.h b/drivers/net/ethernet/intel/igc/igc_regs.h new file mode 100644 index 000000000000..a1bd3216c906 --- /dev/null +++ b/drivers/net/ethernet/intel/igc/igc_regs.h @@ -0,0 +1,221 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2018 Intel Corporation */ + +#ifndef _IGC_REGS_H_ +#define _IGC_REGS_H_ + +/* General Register Descriptions */ +#define IGC_CTRL 0x00000 /* Device Control - RW */ +#define IGC_STATUS 0x00008 /* Device Status - RO */ +#define IGC_EECD 0x00010 /* EEPROM/Flash Control - RW */ +#define IGC_CTRL_EXT 0x00018 /* Extended Device Control - RW */ +#define IGC_MDIC 0x00020 /* MDI Control - RW */ +#define IGC_MDICNFG 0x00E04 /* MDC/MDIO Configuration - RW */ +#define IGC_CONNSW 0x00034 /* Copper/Fiber switch control - RW */ + +/* Internal Packet Buffer Size Registers */ +#define IGC_RXPBS 0x02404 /* Rx Packet Buffer Size - RW */ +#define IGC_TXPBS 0x03404 /* Tx Packet Buffer Size - RW */ + +/* NVM Register Descriptions */ +#define IGC_EERD 0x12014 /* EEprom mode read - RW */ +#define IGC_EEWR 0x12018 /* EEprom mode write - RW */ + +/* Flow Control Register Descriptions */ +#define IGC_FCAL 0x00028 /* FC Address Low - RW */ +#define IGC_FCAH 0x0002C /* FC Address High - RW */ +#define IGC_FCT 0x00030 /* FC Type - RW */ +#define IGC_FCTTV 0x00170 /* FC Transmit Timer - RW */ +#define IGC_FCRTL 0x02160 /* FC Receive Threshold Low - RW */ +#define IGC_FCRTH 0x02168 /* FC Receive Threshold High - RW */ +#define IGC_FCRTV 0x02460 /* FC Refresh Timer Value - RW */ +#define IGC_FCSTS 0x02464 /* FC Status - RO */ + +/* PCIe Register Description */ +#define IGC_GCR 0x05B00 /* PCIe control- RW */ + +/* Semaphore registers */ +#define IGC_SW_FW_SYNC 0x05B5C /* SW-FW Synchronization - RW */ +#define IGC_SWSM 0x05B50 /* SW Semaphore */ +#define IGC_FWSM 0x05B54 /* FW Semaphore */ + +/* Function Active and Power State to MNG */ +#define IGC_FACTPS 0x05B30 + +/* Interrupt Register Description */ +#define IGC_EICS 0x01520 /* Ext. Interrupt Cause Set - W0 */ +#define IGC_EIMS 0x01524 /* Ext. Interrupt Mask Set/Read - RW */ +#define IGC_EIMC 0x01528 /* Ext. Interrupt Mask Clear - WO */ +#define IGC_EIAC 0x0152C /* Ext. Interrupt Auto Clear - RW */ +#define IGC_EIAM 0x01530 /* Ext. Interrupt Auto Mask - RW */ +#define IGC_ICR 0x01500 /* Intr Cause Read - RC/W1C */ +#define IGC_ICS 0x01504 /* Intr Cause Set - WO */ +#define IGC_IMS 0x01508 /* Intr Mask Set/Read - RW */ +#define IGC_IMC 0x0150C /* Intr Mask Clear - WO */ +#define IGC_IAM 0x01510 /* Intr Ack Auto Mask- RW */ +/* Intr Throttle - RW */ +#define IGC_EITR(_n) (0x01680 + (0x4 * (_n))) +/* Interrupt Vector Allocation - RW */ +#define IGC_IVAR0 0x01700 +#define IGC_IVAR_MISC 0x01740 /* IVAR for "other" causes - RW */ +#define IGC_GPIE 0x01514 /* General Purpose Intr Enable - RW */ + +/* Interrupt Cause */ +#define IGC_ICRXPTC 0x04104 /* Rx Packet Timer Expire Count */ +#define IGC_ICRXATC 0x04108 /* Rx Absolute Timer Expire Count */ +#define IGC_ICTXPTC 0x0410C /* Tx Packet Timer Expire Count */ +#define IGC_ICTXATC 0x04110 /* Tx Absolute Timer Expire Count */ +#define IGC_ICTXQEC 0x04118 /* Tx Queue Empty Count */ +#define IGC_ICTXQMTC 0x0411C /* Tx Queue Min Threshold Count */ +#define IGC_ICRXDMTC 0x04120 /* Rx Descriptor Min Threshold Count */ +#define IGC_ICRXOC 0x04124 /* Receiver Overrun Count */ + +#define IGC_CBTMPC 0x0402C /* Circuit Breaker TX Packet Count */ +#define IGC_HTDPMC 0x0403C /* Host Transmit Discarded Packets */ +#define IGC_CBRMPC 0x040FC /* Circuit Breaker RX Packet Count */ +#define IGC_RPTHC 0x04104 /* Rx Packets To Host */ +#define IGC_HGPTC 0x04118 /* Host Good Packets TX Count */ +#define IGC_HTCBDPC 0x04124 /* Host TX Circ.Breaker Drop Count */ + +/* MSI-X Table Register Descriptions */ +#define IGC_PBACL 0x05B68 /* MSIx PBA Clear - R/W 1 to clear */ + +/* Receive Register Descriptions */ +#define IGC_RCTL 0x00100 /* Rx Control - RW */ +#define IGC_SRRCTL(_n) (0x0C00C + ((_n) * 0x40)) +#define IGC_PSRTYPE(_i) (0x05480 + ((_i) * 4)) +#define IGC_RDBAL(_n) (0x0C000 + ((_n) * 0x40)) +#define IGC_RDBAH(_n) (0x0C004 + ((_n) * 0x40)) +#define IGC_RDLEN(_n) (0x0C008 + ((_n) * 0x40)) +#define IGC_RDH(_n) (0x0C010 + ((_n) * 0x40)) +#define IGC_RDT(_n) (0x0C018 + ((_n) * 0x40)) +#define IGC_RXDCTL(_n) (0x0C028 + ((_n) * 0x40)) +#define IGC_RQDPC(_n) (0x0C030 + ((_n) * 0x40)) +#define IGC_RXCSUM 0x05000 /* Rx Checksum Control - RW */ +#define IGC_RLPML 0x05004 /* Rx Long Packet Max Length */ +#define IGC_RFCTL 0x05008 /* Receive Filter Control*/ +#define IGC_MTA 0x05200 /* Multicast Table Array - RW Array */ +#define IGC_UTA 0x0A000 /* Unicast Table Array - RW */ +#define IGC_RAL(_n) (0x05400 + ((_n) * 0x08)) +#define IGC_RAH(_n) (0x05404 + ((_n) * 0x08)) + +/* Transmit Register Descriptions */ +#define IGC_TCTL 0x00400 /* Tx Control - RW */ +#define IGC_TIPG 0x00410 /* Tx Inter-packet gap - RW */ +#define IGC_TDBAL(_n) (0x0E000 + ((_n) * 0x40)) +#define IGC_TDBAH(_n) (0x0E004 + ((_n) * 0x40)) +#define IGC_TDLEN(_n) (0x0E008 + ((_n) * 0x40)) +#define IGC_TDH(_n) (0x0E010 + ((_n) * 0x40)) +#define IGC_TDT(_n) (0x0E018 + ((_n) * 0x40)) +#define IGC_TXDCTL(_n) (0x0E028 + ((_n) * 0x40)) + +/* MMD Register Descriptions */ +#define IGC_MMDAC 13 /* MMD Access Control */ +#define IGC_MMDAAD 14 /* MMD Access Address/Data */ + +/* Good transmitted packets counter registers */ +#define IGC_PQGPTC(_n) (0x010014 + (0x100 * (_n))) + +/* Statistics Register Descriptions */ +#define IGC_CRCERRS 0x04000 /* CRC Error Count - R/clr */ +#define IGC_ALGNERRC 0x04004 /* Alignment Error Count - R/clr */ +#define IGC_SYMERRS 0x04008 /* Symbol Error Count - R/clr */ +#define IGC_RXERRC 0x0400C /* Receive Error Count - R/clr */ +#define IGC_MPC 0x04010 /* Missed Packet Count - R/clr */ +#define IGC_SCC 0x04014 /* Single Collision Count - R/clr */ +#define IGC_ECOL 0x04018 /* Excessive Collision Count - R/clr */ +#define IGC_MCC 0x0401C /* Multiple Collision Count - R/clr */ +#define IGC_LATECOL 0x04020 /* Late Collision Count - R/clr */ +#define IGC_COLC 0x04028 /* Collision Count - R/clr */ +#define IGC_DC 0x04030 /* Defer Count - R/clr */ +#define IGC_TNCRS 0x04034 /* Tx-No CRS - R/clr */ +#define IGC_SEC 0x04038 /* Sequence Error Count - R/clr */ +#define IGC_CEXTERR 0x0403C /* Carrier Extension Error Count - R/clr */ +#define IGC_RLEC 0x04040 /* Receive Length Error Count - R/clr */ +#define IGC_XONRXC 0x04048 /* XON Rx Count - R/clr */ +#define IGC_XONTXC 0x0404C /* XON Tx Count - R/clr */ +#define IGC_XOFFRXC 0x04050 /* XOFF Rx Count - R/clr */ +#define IGC_XOFFTXC 0x04054 /* XOFF Tx Count - R/clr */ +#define IGC_FCRUC 0x04058 /* Flow Control Rx Unsupported Count- R/clr */ +#define IGC_PRC64 0x0405C /* Packets Rx (64 bytes) - R/clr */ +#define IGC_PRC127 0x04060 /* Packets Rx (65-127 bytes) - R/clr */ +#define IGC_PRC255 0x04064 /* Packets Rx (128-255 bytes) - R/clr */ +#define IGC_PRC511 0x04068 /* Packets Rx (255-511 bytes) - R/clr */ +#define IGC_PRC1023 0x0406C /* Packets Rx (512-1023 bytes) - R/clr */ +#define IGC_PRC1522 0x04070 /* Packets Rx (1024-1522 bytes) - R/clr */ +#define IGC_GPRC 0x04074 /* Good Packets Rx Count - R/clr */ +#define IGC_BPRC 0x04078 /* Broadcast Packets Rx Count - R/clr */ +#define IGC_MPRC 0x0407C /* Multicast Packets Rx Count - R/clr */ +#define IGC_GPTC 0x04080 /* Good Packets Tx Count - R/clr */ +#define IGC_GORCL 0x04088 /* Good Octets Rx Count Low - R/clr */ +#define IGC_GORCH 0x0408C /* Good Octets Rx Count High - R/clr */ +#define IGC_GOTCL 0x04090 /* Good Octets Tx Count Low - R/clr */ +#define IGC_GOTCH 0x04094 /* Good Octets Tx Count High - R/clr */ +#define IGC_RNBC 0x040A0 /* Rx No Buffers Count - R/clr */ +#define IGC_RUC 0x040A4 /* Rx Undersize Count - R/clr */ +#define IGC_RFC 0x040A8 /* Rx Fragment Count - R/clr */ +#define IGC_ROC 0x040AC /* Rx Oversize Count - R/clr */ +#define IGC_RJC 0x040B0 /* Rx Jabber Count - R/clr */ +#define IGC_MGTPRC 0x040B4 /* Management Packets Rx Count - R/clr */ +#define IGC_MGTPDC 0x040B8 /* Management Packets Dropped Count - R/clr */ +#define IGC_MGTPTC 0x040BC /* Management Packets Tx Count - R/clr */ +#define IGC_TORL 0x040C0 /* Total Octets Rx Low - R/clr */ +#define IGC_TORH 0x040C4 /* Total Octets Rx High - R/clr */ +#define IGC_TOTL 0x040C8 /* Total Octets Tx Low - R/clr */ +#define IGC_TOTH 0x040CC /* Total Octets Tx High - R/clr */ +#define IGC_TPR 0x040D0 /* Total Packets Rx - R/clr */ +#define IGC_TPT 0x040D4 /* Total Packets Tx - R/clr */ +#define IGC_PTC64 0x040D8 /* Packets Tx (64 bytes) - R/clr */ +#define IGC_PTC127 0x040DC /* Packets Tx (65-127 bytes) - R/clr */ +#define IGC_PTC255 0x040E0 /* Packets Tx (128-255 bytes) - R/clr */ +#define IGC_PTC511 0x040E4 /* Packets Tx (256-511 bytes) - R/clr */ +#define IGC_PTC1023 0x040E8 /* Packets Tx (512-1023 bytes) - R/clr */ +#define IGC_PTC1522 0x040EC /* Packets Tx (1024-1522 Bytes) - R/clr */ +#define IGC_MPTC 0x040F0 /* Multicast Packets Tx Count - R/clr */ +#define IGC_BPTC 0x040F4 /* Broadcast Packets Tx Count - R/clr */ +#define IGC_TSCTC 0x040F8 /* TCP Segmentation Context Tx - R/clr */ +#define IGC_TSCTFC 0x040FC /* TCP Segmentation Context Tx Fail - R/clr */ +#define IGC_IAC 0x04100 /* Interrupt Assertion Count */ +#define IGC_ICTXPTC 0x0410C /* Interrupt Cause Tx Pkt Timer Expire Count */ +#define IGC_ICTXATC 0x04110 /* Interrupt Cause Tx Abs Timer Expire Count */ +#define IGC_ICTXQEC 0x04118 /* Interrupt Cause Tx Queue Empty Count */ +#define IGC_ICTXQMTC 0x0411C /* Interrupt Cause Tx Queue Min Thresh Count */ +#define IGC_RPTHC 0x04104 /* Rx Packets To Host */ +#define IGC_HGPTC 0x04118 /* Host Good Packets Tx Count */ +#define IGC_RXDMTC 0x04120 /* Rx Descriptor Minimum Threshold Count */ +#define IGC_HGORCL 0x04128 /* Host Good Octets Received Count Low */ +#define IGC_HGORCH 0x0412C /* Host Good Octets Received Count High */ +#define IGC_HGOTCL 0x04130 /* Host Good Octets Transmit Count Low */ +#define IGC_HGOTCH 0x04134 /* Host Good Octets Transmit Count High */ +#define IGC_LENERRS 0x04138 /* Length Errors Count */ +#define IGC_SCVPC 0x04228 /* SerDes/SGMII Code Violation Pkt Count */ +#define IGC_HRMPC 0x0A018 /* Header Redirection Missed Packet Count */ + +/* Management registers */ +#define IGC_MANC 0x05820 /* Management Control - RW */ + +/* Shadow Ram Write Register - RW */ +#define IGC_SRWR 0x12018 + +/* forward declaration */ +struct igc_hw; +u32 igc_rd32(struct igc_hw *hw, u32 reg); + +/* write operations, indexed using DWORDS */ +#define wr32(reg, val) \ +do { \ + u8 __iomem *hw_addr = READ_ONCE((hw)->hw_addr); \ + if (!IGC_REMOVED(hw_addr)) \ + writel((val), &hw_addr[(reg)]); \ +} while (0) + +#define rd32(reg) (igc_rd32(hw, reg)) + +#define wrfl() ((void)rd32(IGC_STATUS)) + +#define array_wr32(reg, offset, value) \ + wr32((reg) + ((offset) << 2), (value)) + +#define array_rd32(reg, offset) (igc_rd32(hw, (reg) + ((offset) << 2))) + +#endif |