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authorSasha Neftin <sasha.neftin@intel.com>2018-10-11 10:17:13 +0300
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2018-10-17 13:14:03 -0700
commitc9a11c23ceb65db7ecc5735e7428311d70e74ba9 (patch)
tree9d52fe6e7e45df154f1949049c71a40386f4f0c8 /drivers/net/ethernet/intel
parentigc: Add support for PF (diff)
downloadlinux-dev-c9a11c23ceb65db7ecc5735e7428311d70e74ba9.tar.xz
linux-dev-c9a11c23ceb65db7ecc5735e7428311d70e74ba9.zip
igc: Add netdev
Now that we have the ability to configure the basic settings on the device we can start allocating and configuring a netdev for the interface. Signed-off-by: Sasha Neftin <sasha.neftin@intel.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel')
-rw-r--r--drivers/net/ethernet/intel/igc/igc.h48
-rw-r--r--drivers/net/ethernet/intel/igc/igc_defines.h15
-rw-r--r--drivers/net/ethernet/intel/igc/igc_hw.h1
-rw-r--r--drivers/net/ethernet/intel/igc/igc_main.c471
4 files changed, 534 insertions, 1 deletions
diff --git a/drivers/net/ethernet/intel/igc/igc.h b/drivers/net/ethernet/intel/igc/igc.h
index 481b2ee694fa..2e819cac19e5 100644
--- a/drivers/net/ethernet/intel/igc/igc.h
+++ b/drivers/net/ethernet/intel/igc/igc.h
@@ -28,15 +28,63 @@
extern char igc_driver_name[];
extern char igc_driver_version[];
+/* 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
+
+enum igc_state_t {
+ __IGC_TESTING,
+ __IGC_RESETTING,
+ __IGC_DOWN,
+ __IGC_PTP_TX_IN_PROGRESS,
+};
+
+struct igc_q_vector {
+ struct igc_adapter *adapter; /* backlink */
+
+ struct napi_struct napi;
+};
+
+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;
+ u16 link_speed;
+ u16 link_duplex;
+
+ u8 port_num;
+
u8 __iomem *io_addr;
+ struct work_struct watchdog_task;
+
+ int msg_enable;
+ u32 max_frame_size;
/* OS defined structs */
struct pci_dev *pdev;
/* structs defined in igc_hw.h */
struct igc_hw hw;
+
+ struct igc_q_vector *q_vector[MAX_Q_VECTORS];
+
+ struct igc_mac_addr *mac_table;
};
#endif /* _IGC_H_ */
diff --git a/drivers/net/ethernet/intel/igc/igc_defines.h b/drivers/net/ethernet/intel/igc/igc_defines.h
index d19dff1d6b74..c25f75ed9cd4 100644
--- a/drivers/net/ethernet/intel/igc/igc_defines.h
+++ b/drivers/net/ethernet/intel/igc/igc_defines.h
@@ -4,10 +4,22 @@
#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
+/* 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
+
/* Error Codes */
#define IGC_SUCCESS 0
#define IGC_ERR_NVM 1
@@ -17,6 +29,9 @@
#define IGC_ERR_MAC_INIT 5
#define IGC_ERR_RESET 9
+/* PBA constants */
+#define IGC_PBA_34K 0x0022
+
/* Device Status */
#define IGC_STATUS_FD 0x00000001 /* Full duplex.0=half,1=full */
#define IGC_STATUS_LU 0x00000002 /* Link up.0=no,1=link */
diff --git a/drivers/net/ethernet/intel/igc/igc_hw.h b/drivers/net/ethernet/intel/igc/igc_hw.h
index 84b6067a2476..4cac2e8868e0 100644
--- a/drivers/net/ethernet/intel/igc/igc_hw.h
+++ b/drivers/net/ethernet/intel/igc/igc_hw.h
@@ -59,6 +59,7 @@ struct igc_mac_info {
bool autoneg;
bool autoneg_failed;
+ bool get_link_status;
};
struct igc_bus_info {
diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index 6a881753f5ce..7c5b0d2f16bf 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -3,6 +3,8 @@
#include <linux/module.h>
#include <linux/types.h>
+#include <linux/if_vlan.h>
+#include <linux/aer.h>
#include "igc.h"
#include "igc_hw.h"
@@ -10,10 +12,14 @@
#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;
@@ -32,6 +38,364 @@ MODULE_DEVICE_TABLE(pci, igc_pci_tbl);
/* forward declaration */
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_reset(struct igc_adapter *adapter)
+{
+ if (!netif_running(adapter->netdev))
+ igc_power_down_link(adapter);
+}
+
+/**
+ * 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_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)
+{
+}
+
+/**
+ * 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_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 netdev_tx_t igc_xmit_frame(struct sk_buff *skb,
+ struct net_device *netdev)
+{
+ dev_kfree_skb_any(skb);
+ return NETDEV_TX_OK;
+}
+
+/**
+ * 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)
+{
+ 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);
+}
+
+/**
+ * igc_update_stats - Update the board statistics counters
+ * @adapter: board private structure
+ */
+static void igc_update_stats(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;
+ int i = 0;
+
+ set_bit(__IGC_DOWN, &adapter->state);
+
+ /* 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);
+
+ for (i = 0; i < adapter->num_q_vectors; i++)
+ napi_disable(&adapter->q_vector[i]->napi);
+
+ adapter->link_speed = 0;
+ adapter->link_duplex = 0;
+}
+
+/**
+ * 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)
+{
+ igc_get_hw_control(adapter);
+}
+
+/**
+ * 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_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 i = 0;
+
+ /* disallow open during test */
+
+ if (test_bit(__IGC_TESTING, &adapter->state)) {
+ WARN_ON(resuming);
+ return -EBUSY;
+ }
+
+ netif_carrier_off(netdev);
+
+ igc_power_up_link(adapter);
+
+ 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);
+
+ /* start the watchdog. */
+ hw->mac.get_link_status = 1;
+
+ return IGC_SUCCESS;
+}
+
+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);
+
+ 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)
@@ -78,6 +442,7 @@ s32 igc_write_pcie_cap_reg(struct igc_hw *hw, u32 reg, u16 *value)
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;
@@ -87,8 +452,13 @@ u32 igc_rd32(struct igc_hw *hw, u32 reg)
value = readl(&hw_addr[reg]);
/* reads should not return all F's */
- if (!(~value) && (!reg || !(~readl(hw_addr))))
+ 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;
}
@@ -108,6 +478,8 @@ 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;
int err, pci_using_dac;
err = pci_enable_device_mem(pdev);
@@ -140,17 +512,94 @@ static int igc_probe(struct pci_dev *pdev,
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;
/* 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;
+
+ /* 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);
+
+ /* 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_sw_init:
+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);
@@ -168,9 +617,22 @@ err_dma:
*/
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);
+ flush_scheduled_work();
+
+ /* 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);
+
pci_release_selected_regions(pdev,
pci_select_bars(pdev, IORESOURCE_MEM));
+ free_netdev(netdev);
pci_disable_device(pdev);
}
@@ -191,6 +653,7 @@ static struct pci_driver igc_driver = {
*/
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;
@@ -205,6 +668,12 @@ static int igc_sw_init(struct igc_adapter *adapter)
pci_read_config_word(pdev, PCI_COMMAND, &hw->bus.pci_cmd_word);
+ /* 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;
+
+ set_bit(__IGC_DOWN, &adapter->state);
+
return 0;
}