diff options
Diffstat (limited to '')
67 files changed, 2151 insertions, 1703 deletions
diff --git a/drivers/net/can/Makefile b/drivers/net/can/Makefile index a2b4463d8480..1e660afcb61b 100644 --- a/drivers/net/can/Makefile +++ b/drivers/net/can/Makefile @@ -16,7 +16,7 @@ obj-y += softing/ obj-$(CONFIG_CAN_AT91) += at91_can.o obj-$(CONFIG_CAN_CC770) += cc770/ obj-$(CONFIG_CAN_C_CAN) += c_can/ -obj-$(CONFIG_CAN_FLEXCAN) += flexcan.o +obj-$(CONFIG_CAN_FLEXCAN) += flexcan/ obj-$(CONFIG_CAN_GRCAN) += grcan.o obj-$(CONFIG_CAN_IFI_CANFD) += ifi_canfd/ obj-$(CONFIG_CAN_JANZ_ICAN3) += janz-ican3.o diff --git a/drivers/net/can/at91_can.c b/drivers/net/can/at91_can.c index 3aea32c9b108..a00655ccda02 100644 --- a/drivers/net/can/at91_can.c +++ b/drivers/net/can/at91_can.c @@ -448,7 +448,6 @@ static void at91_chip_stop(struct net_device *dev, enum can_state state) static netdev_tx_t at91_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct at91_priv *priv = netdev_priv(dev); - struct net_device_stats *stats = &dev->stats; struct can_frame *cf = (struct can_frame *)skb->data; unsigned int mb, prio; u32 reg_mid, reg_mcr; @@ -480,8 +479,6 @@ static netdev_tx_t at91_start_xmit(struct sk_buff *skb, struct net_device *dev) /* This triggers transmission */ at91_write(priv, AT91_MCR(mb), reg_mcr); - stats->tx_bytes += cf->len; - /* _NOTE_: subtract AT91_MB_TX_FIRST offset from mb! */ can_put_echo_skb(skb, dev, mb - get_mb_tx_first(priv), 0); @@ -553,8 +550,6 @@ static void at91_rx_overflow_err(struct net_device *dev) cf->can_id |= CAN_ERR_CRTL; cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW; - stats->rx_packets++; - stats->rx_bytes += cf->len; netif_receive_skb(skb); } @@ -619,7 +614,9 @@ static void at91_read_msg(struct net_device *dev, unsigned int mb) at91_read_mb(dev, mb, cf); stats->rx_packets++; - stats->rx_bytes += cf->len; + if (!(cf->can_id & CAN_RTR_FLAG)) + stats->rx_bytes += cf->len; + netif_receive_skb(skb); can_led_event(dev, CAN_LED_EVENT_RX); @@ -779,8 +776,6 @@ static int at91_poll_err(struct net_device *dev, int quota, u32 reg_sr) at91_poll_err_frame(dev, cf, reg_sr); - dev->stats.rx_packets++; - dev->stats.rx_bytes += cf->len; netif_receive_skb(skb); return 1; @@ -854,7 +849,10 @@ static void at91_irq_tx(struct net_device *dev, u32 reg_sr) if (likely(reg_msr & AT91_MSR_MRDY && ~reg_msr & AT91_MSR_MABT)) { /* _NOTE_: subtract AT91_MB_TX_FIRST offset from mb! */ - can_get_echo_skb(dev, mb - get_mb_tx_first(priv), NULL); + dev->stats.tx_bytes += + can_get_echo_skb(dev, + mb - get_mb_tx_first(priv), + NULL); dev->stats.tx_packets++; can_led_event(dev, CAN_LED_EVENT_TX); } @@ -1037,8 +1035,6 @@ static void at91_irq_err(struct net_device *dev) at91_irq_err_state(dev, cf, new_state); - dev->stats.rx_packets++; - dev->stats.rx_bytes += cf->len; netif_rx(skb); priv->can.state = new_state; diff --git a/drivers/net/can/c_can/c_can.h b/drivers/net/can/c_can/c_can.h index 08b6efa7a1a7..bd2f6dc01194 100644 --- a/drivers/net/can/c_can/c_can.h +++ b/drivers/net/can/c_can/c_can.h @@ -211,7 +211,6 @@ struct c_can_priv { struct c_can_raminit raminit_sys; /* RAMINIT via syscon regmap */ void (*raminit)(const struct c_can_priv *priv, bool enable); u32 comm_rcv_high; - u32 dlc[]; }; struct net_device *alloc_c_can_dev(int msg_obj_num); diff --git a/drivers/net/can/c_can/c_can_ethtool.c b/drivers/net/can/c_can/c_can_ethtool.c index 377c7d2e7612..6655146294fc 100644 --- a/drivers/net/can/c_can/c_can_ethtool.c +++ b/drivers/net/can/c_can/c_can_ethtool.c @@ -20,7 +20,9 @@ static void c_can_get_drvinfo(struct net_device *netdev, } static void c_can_get_ringparam(struct net_device *netdev, - struct ethtool_ringparam *ring) + struct ethtool_ringparam *ring, + struct kernel_ethtool_ringparam *kernel_ring, + struct netlink_ext_ack *extack) { struct c_can_priv *priv = netdev_priv(netdev); diff --git a/drivers/net/can/c_can/c_can_main.c b/drivers/net/can/c_can/c_can_main.c index 52671d1ea17d..faa217f26771 100644 --- a/drivers/net/can/c_can/c_can_main.c +++ b/drivers/net/can/c_can/c_can_main.c @@ -403,10 +403,10 @@ static int c_can_read_msg_object(struct net_device *dev, int iface, u32 ctrl) frame->data[i + 1] = data >> 8; } } - } + stats->rx_bytes += frame->len; + } stats->rx_packets++; - stats->rx_bytes += frame->len; netif_receive_skb(skb); return 0; @@ -477,7 +477,6 @@ static netdev_tx_t c_can_start_xmit(struct sk_buff *skb, * transmit as we might race against do_tx(). */ c_can_setup_tx_object(dev, IF_TX, frame, idx); - priv->dlc[idx] = frame->len; can_put_echo_skb(skb, dev, idx, 0); obj = idx + priv->msg_obj_tx_first; c_can_object_put(dev, IF_TX, obj, cmd); @@ -742,8 +741,7 @@ static void c_can_do_tx(struct net_device *dev) * NAPI. We are not transmitting. */ c_can_inval_tx_object(dev, IF_NAPI, obj); - can_get_echo_skb(dev, idx, NULL); - bytes += priv->dlc[idx]; + bytes += can_get_echo_skb(dev, idx, NULL); pkts++; } @@ -920,7 +918,6 @@ static int c_can_handle_state_change(struct net_device *dev, unsigned int reg_err_counter; unsigned int rx_err_passive; struct c_can_priv *priv = netdev_priv(dev); - struct net_device_stats *stats = &dev->stats; struct can_frame *cf; struct sk_buff *skb; struct can_berr_counter bec; @@ -996,8 +993,6 @@ static int c_can_handle_state_change(struct net_device *dev, break; } - stats->rx_packets++; - stats->rx_bytes += cf->len; netif_receive_skb(skb); return 1; @@ -1064,8 +1059,6 @@ static int c_can_handle_bus_err(struct net_device *dev, break; } - stats->rx_packets++; - stats->rx_bytes += cf->len; netif_receive_skb(skb); return 1; } @@ -1232,8 +1225,7 @@ struct net_device *alloc_c_can_dev(int msg_obj_num) struct c_can_priv *priv; int msg_obj_tx_num = msg_obj_num / 2; - dev = alloc_candev(struct_size(priv, dlc, msg_obj_tx_num), - msg_obj_tx_num); + dev = alloc_candev(sizeof(*priv), msg_obj_tx_num); if (!dev) return NULL; diff --git a/drivers/net/can/cc770/cc770.c b/drivers/net/can/cc770/cc770.c index f8a130f594e2..bb7224cfc6ab 100644 --- a/drivers/net/can/cc770/cc770.c +++ b/drivers/net/can/cc770/cc770.c @@ -489,17 +489,17 @@ static void cc770_rx(struct net_device *dev, unsigned int mo, u8 ctrl1) cf->len = can_cc_dlc2len((config & 0xf0) >> 4); for (i = 0; i < cf->len; i++) cf->data[i] = cc770_read_reg(priv, msgobj[mo].data[i]); - } + stats->rx_bytes += cf->len; + } stats->rx_packets++; - stats->rx_bytes += cf->len; + netif_rx(skb); } static int cc770_err(struct net_device *dev, u8 status) { struct cc770_priv *priv = netdev_priv(dev); - struct net_device_stats *stats = &dev->stats; struct can_frame *cf; struct sk_buff *skb; u8 lec; @@ -571,8 +571,6 @@ static int cc770_err(struct net_device *dev, u8 status) } - stats->rx_packets++; - stats->rx_bytes += cf->len; netif_rx(skb); return 0; @@ -666,7 +664,6 @@ static void cc770_tx_interrupt(struct net_device *dev, unsigned int o) struct cc770_priv *priv = netdev_priv(dev); struct net_device_stats *stats = &dev->stats; unsigned int mo = obj2msgobj(o); - struct can_frame *cf; u8 ctrl1; ctrl1 = cc770_read_reg(priv, msgobj[mo].ctrl1); @@ -698,12 +695,9 @@ static void cc770_tx_interrupt(struct net_device *dev, unsigned int o) return; } - cf = (struct can_frame *)priv->tx_skb->data; - stats->tx_bytes += cf->len; - stats->tx_packets++; - can_put_echo_skb(priv->tx_skb, dev, 0, 0); - can_get_echo_skb(dev, 0, NULL); + stats->tx_bytes += can_get_echo_skb(dev, 0, NULL); + stats->tx_packets++; priv->tx_skb = NULL; netif_wake_queue(dev); diff --git a/drivers/net/can/dev/bittiming.c b/drivers/net/can/dev/bittiming.c index 0509625c3082..d5fca3bfaf9a 100644 --- a/drivers/net/can/dev/bittiming.c +++ b/drivers/net/can/dev/bittiming.c @@ -4,6 +4,7 @@ * Copyright (C) 2008-2009 Wolfgang Grandegger <wg@grandegger.com> */ +#include <linux/units.h> #include <linux/can/dev.h> #ifdef CONFIG_CAN_CALC_BITTIMING @@ -81,9 +82,9 @@ int can_calc_bittiming(struct net_device *dev, struct can_bittiming *bt, if (bt->sample_point) { sample_point_nominal = bt->sample_point; } else { - if (bt->bitrate > 800 * CAN_KBPS) + if (bt->bitrate > 800 * KILO /* BPS */) sample_point_nominal = 750; - else if (bt->bitrate > 500 * CAN_KBPS) + else if (bt->bitrate > 500 * KILO /* BPS */) sample_point_nominal = 800; else sample_point_nominal = 875; diff --git a/drivers/net/can/dev/dev.c b/drivers/net/can/dev/dev.c index e3d840b81357..c192f25f9695 100644 --- a/drivers/net/can/dev/dev.c +++ b/drivers/net/can/dev/dev.c @@ -136,7 +136,6 @@ EXPORT_SYMBOL_GPL(can_change_state); static void can_restart(struct net_device *dev) { struct can_priv *priv = netdev_priv(dev); - struct net_device_stats *stats = &dev->stats; struct sk_buff *skb; struct can_frame *cf; int err; @@ -155,9 +154,6 @@ static void can_restart(struct net_device *dev) cf->can_id |= CAN_ERR_RESTARTED; - stats->rx_packets++; - stats->rx_bytes += cf->len; - netif_rx_ni(skb); restart: @@ -300,6 +296,7 @@ EXPORT_SYMBOL_GPL(free_candev); int can_change_mtu(struct net_device *dev, int new_mtu) { struct can_priv *priv = netdev_priv(dev); + u32 ctrlmode_static = can_get_static_ctrlmode(priv); /* Do not allow changing the MTU while running */ if (dev->flags & IFF_UP) @@ -309,7 +306,7 @@ int can_change_mtu(struct net_device *dev, int new_mtu) switch (new_mtu) { case CAN_MTU: /* 'CANFD-only' controllers can not switch to CAN_MTU */ - if (priv->ctrlmode_static & CAN_CTRLMODE_FD) + if (ctrlmode_static & CAN_CTRLMODE_FD) return -EINVAL; priv->ctrlmode &= ~CAN_CTRLMODE_FD; @@ -318,7 +315,7 @@ int can_change_mtu(struct net_device *dev, int new_mtu) case CANFD_MTU: /* check for potential CANFD ability */ if (!(priv->ctrlmode_supported & CAN_CTRLMODE_FD) && - !(priv->ctrlmode_static & CAN_CTRLMODE_FD)) + !(ctrlmode_static & CAN_CTRLMODE_FD)) return -EINVAL; priv->ctrlmode |= CAN_CTRLMODE_FD; diff --git a/drivers/net/can/dev/netlink.c b/drivers/net/can/dev/netlink.c index 95cca4e5251f..7633d98e3912 100644 --- a/drivers/net/can/dev/netlink.c +++ b/drivers/net/can/dev/netlink.c @@ -21,6 +21,7 @@ static const struct nla_policy can_policy[IFLA_CAN_MAX + 1] = { [IFLA_CAN_DATA_BITTIMING_CONST] = { .len = sizeof(struct can_bittiming_const) }, [IFLA_CAN_TERMINATION] = { .type = NLA_U16 }, [IFLA_CAN_TDC] = { .type = NLA_NESTED }, + [IFLA_CAN_CTRLMODE_EXT] = { .type = NLA_NESTED }, }; static const struct nla_policy can_tdc_policy[IFLA_CAN_TDC_MAX + 1] = { @@ -211,7 +212,7 @@ static int can_changelink(struct net_device *dev, struct nlattr *tb[], if (dev->flags & IFF_UP) return -EBUSY; cm = nla_data(data[IFLA_CAN_CTRLMODE]); - ctrlstatic = priv->ctrlmode_static; + ctrlstatic = can_get_static_ctrlmode(priv); maskedflags = cm->flags & cm->mask; /* check whether provided bits are allowed to be passed */ @@ -383,6 +384,12 @@ static size_t can_tdc_get_size(const struct net_device *dev) return size; } +static size_t can_ctrlmode_ext_get_size(void) +{ + return nla_total_size(0) + /* nest IFLA_CAN_CTRLMODE_EXT */ + nla_total_size(sizeof(u32)); /* IFLA_CAN_CTRLMODE_SUPPORTED */ +} + static size_t can_get_size(const struct net_device *dev) { struct can_priv *priv = netdev_priv(dev); @@ -415,6 +422,7 @@ static size_t can_get_size(const struct net_device *dev) priv->data_bitrate_const_cnt); size += sizeof(priv->bitrate_max); /* IFLA_CAN_BITRATE_MAX */ size += can_tdc_get_size(dev); /* IFLA_CAN_TDC */ + size += can_ctrlmode_ext_get_size(); /* IFLA_CAN_CTRLMODE_EXT */ return size; } @@ -472,6 +480,25 @@ err_cancel: return -EMSGSIZE; } +static int can_ctrlmode_ext_fill_info(struct sk_buff *skb, + const struct can_priv *priv) +{ + struct nlattr *nest; + + nest = nla_nest_start(skb, IFLA_CAN_CTRLMODE_EXT); + if (!nest) + return -EMSGSIZE; + + if (nla_put_u32(skb, IFLA_CAN_CTRLMODE_SUPPORTED, + priv->ctrlmode_supported)) { + nla_nest_cancel(skb, nest); + return -EMSGSIZE; + } + + nla_nest_end(skb, nest); + return 0; +} + static int can_fill_info(struct sk_buff *skb, const struct net_device *dev) { struct can_priv *priv = netdev_priv(dev); @@ -531,7 +558,9 @@ static int can_fill_info(struct sk_buff *skb, const struct net_device *dev) sizeof(priv->bitrate_max), &priv->bitrate_max)) || - (can_tdc_fill_info(skb, dev)) + can_tdc_fill_info(skb, dev) || + + can_ctrlmode_ext_fill_info(skb, priv) ) return -EMSGSIZE; diff --git a/drivers/net/can/dev/rx-offload.c b/drivers/net/can/dev/rx-offload.c index 37b0cc65237b..7f80d8e1e750 100644 --- a/drivers/net/can/dev/rx-offload.c +++ b/drivers/net/can/dev/rx-offload.c @@ -54,8 +54,11 @@ static int can_rx_offload_napi_poll(struct napi_struct *napi, int quota) struct can_frame *cf = (struct can_frame *)skb->data; work_done++; - stats->rx_packets++; - stats->rx_bytes += cf->len; + if (!(cf->can_id & CAN_ERR_FLAG)) { + stats->rx_packets++; + if (!(cf->can_id & CAN_RTR_FLAG)) + stats->rx_bytes += cf->len; + } netif_receive_skb(skb); } diff --git a/drivers/net/can/flexcan/Makefile b/drivers/net/can/flexcan/Makefile new file mode 100644 index 000000000000..89d5695c902e --- /dev/null +++ b/drivers/net/can/flexcan/Makefile @@ -0,0 +1,7 @@ +# SPDX-License-Identifier: GPL-2.0 + +obj-$(CONFIG_CAN_FLEXCAN) += flexcan.o + +flexcan-objs := +flexcan-objs += flexcan-core.o +flexcan-objs += flexcan-ethtool.o diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan/flexcan-core.c index 12b60ad95b02..0bff1884d5cc 100644 --- a/drivers/net/can/flexcan.c +++ b/drivers/net/can/flexcan/flexcan-core.c @@ -15,7 +15,6 @@ #include <linux/can/dev.h> #include <linux/can/error.h> #include <linux/can/led.h> -#include <linux/can/rx-offload.h> #include <linux/clk.h> #include <linux/delay.h> #include <linux/firmware/imx/sci.h> @@ -33,6 +32,8 @@ #include <linux/regmap.h> #include <linux/regulator/consumer.h> +#include "flexcan.h" + #define DRV_NAME "flexcan" /* 8 for RX fifo and 2 error handling */ @@ -173,9 +174,9 @@ /* FLEXCAN interrupt flag register (IFLAG) bits */ /* Errata ERR005829 step7: Reserve first valid MB */ -#define FLEXCAN_TX_MB_RESERVED_OFF_FIFO 8 -#define FLEXCAN_TX_MB_RESERVED_OFF_TIMESTAMP 0 -#define FLEXCAN_RX_MB_OFF_TIMESTAMP_FIRST (FLEXCAN_TX_MB_RESERVED_OFF_TIMESTAMP + 1) +#define FLEXCAN_TX_MB_RESERVED_RX_FIFO 8 +#define FLEXCAN_TX_MB_RESERVED_RX_MAILBOX 0 +#define FLEXCAN_RX_MB_RX_MAILBOX_FIRST (FLEXCAN_TX_MB_RESERVED_RX_MAILBOX + 1) #define FLEXCAN_IFLAG_MB(x) BIT_ULL(x) #define FLEXCAN_IFLAG_RX_FIFO_OVERFLOW BIT(7) #define FLEXCAN_IFLAG_RX_FIFO_WARN BIT(6) @@ -206,53 +207,6 @@ #define FLEXCAN_TIMEOUT_US (250) -/* FLEXCAN hardware feature flags - * - * Below is some version info we got: - * SOC Version IP-Version Glitch- [TR]WRN_INT IRQ Err Memory err RTR rece- FD Mode MB - * Filter? connected? Passive detection ption in MB Supported? - * MCF5441X FlexCAN2 ? no yes no no yes no 16 - * MX25 FlexCAN2 03.00.00.00 no no no no no no 64 - * MX28 FlexCAN2 03.00.04.00 yes yes no no no no 64 - * MX35 FlexCAN2 03.00.00.00 no no no no no no 64 - * MX53 FlexCAN2 03.00.00.00 yes no no no no no 64 - * MX6s FlexCAN3 10.00.12.00 yes yes no no yes no 64 - * MX8QM FlexCAN3 03.00.23.00 yes yes no no yes yes 64 - * MX8MP FlexCAN3 03.00.17.01 yes yes no yes yes yes 64 - * VF610 FlexCAN3 ? no yes no yes yes? no 64 - * LS1021A FlexCAN2 03.00.04.00 no yes no no yes no 64 - * LX2160A FlexCAN3 03.00.23.00 no yes no yes yes yes 64 - * - * Some SOCs do not have the RX_WARN & TX_WARN interrupt line connected. - */ - -/* [TR]WRN_INT not connected */ -#define FLEXCAN_QUIRK_BROKEN_WERR_STATE BIT(1) - /* Disable RX FIFO Global mask */ -#define FLEXCAN_QUIRK_DISABLE_RXFG BIT(2) -/* Enable EACEN and RRS bit in ctrl2 */ -#define FLEXCAN_QUIRK_ENABLE_EACEN_RRS BIT(3) -/* Disable non-correctable errors interrupt and freeze mode */ -#define FLEXCAN_QUIRK_DISABLE_MECR BIT(4) -/* Use timestamp based offloading */ -#define FLEXCAN_QUIRK_USE_OFF_TIMESTAMP BIT(5) -/* No interrupt for error passive */ -#define FLEXCAN_QUIRK_BROKEN_PERR_STATE BIT(6) -/* default to BE register access */ -#define FLEXCAN_QUIRK_DEFAULT_BIG_ENDIAN BIT(7) -/* Setup stop mode with GPR to support wakeup */ -#define FLEXCAN_QUIRK_SETUP_STOP_MODE_GPR BIT(8) -/* Support CAN-FD mode */ -#define FLEXCAN_QUIRK_SUPPORT_FD BIT(9) -/* support memory detection and correction */ -#define FLEXCAN_QUIRK_SUPPORT_ECC BIT(10) -/* Setup stop mode with SCU firmware to support wakeup */ -#define FLEXCAN_QUIRK_SETUP_STOP_MODE_SCFW BIT(11) -/* Setup 3 separate interrupts, main, boff and err */ -#define FLEXCAN_QUIRK_NR_IRQ_3 BIT(12) -/* Setup 16 mailboxes */ -#define FLEXCAN_QUIRK_NR_MB_16 BIT(13) - /* Structure of the message buffer */ struct flexcan_mb { u32 can_ctrl; @@ -339,106 +293,80 @@ struct flexcan_regs { static_assert(sizeof(struct flexcan_regs) == 0x4 * 18 + 0xfb8); -struct flexcan_devtype_data { - u32 quirks; /* quirks needed for different IP cores */ -}; - -struct flexcan_stop_mode { - struct regmap *gpr; - u8 req_gpr; - u8 req_bit; -}; - -struct flexcan_priv { - struct can_priv can; - struct can_rx_offload offload; - struct device *dev; - - struct flexcan_regs __iomem *regs; - struct flexcan_mb __iomem *tx_mb; - struct flexcan_mb __iomem *tx_mb_reserved; - u8 tx_mb_idx; - u8 mb_count; - u8 mb_size; - u8 clk_src; /* clock source of CAN Protocol Engine */ - u8 scu_idx; - - u64 rx_mask; - u64 tx_mask; - u32 reg_ctrl_default; - - struct clk *clk_ipg; - struct clk *clk_per; - const struct flexcan_devtype_data *devtype_data; - struct regulator *reg_xceiver; - struct flexcan_stop_mode stm; - - int irq_boff; - int irq_err; - - /* IPC handle when setup stop mode by System Controller firmware(scfw) */ - struct imx_sc_ipc *sc_ipc_handle; - - /* Read and Write APIs */ - u32 (*read)(void __iomem *addr); - void (*write)(u32 val, void __iomem *addr); -}; - static const struct flexcan_devtype_data fsl_mcf5441x_devtype_data = { .quirks = FLEXCAN_QUIRK_BROKEN_PERR_STATE | - FLEXCAN_QUIRK_NR_IRQ_3 | FLEXCAN_QUIRK_NR_MB_16, + FLEXCAN_QUIRK_NR_IRQ_3 | FLEXCAN_QUIRK_NR_MB_16 | + FLEXCAN_QUIRK_SUPPPORT_RX_FIFO, }; static const struct flexcan_devtype_data fsl_p1010_devtype_data = { .quirks = FLEXCAN_QUIRK_BROKEN_WERR_STATE | FLEXCAN_QUIRK_BROKEN_PERR_STATE | - FLEXCAN_QUIRK_DEFAULT_BIG_ENDIAN, + FLEXCAN_QUIRK_DEFAULT_BIG_ENDIAN | + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX | + FLEXCAN_QUIRK_SUPPPORT_RX_FIFO, }; static const struct flexcan_devtype_data fsl_imx25_devtype_data = { .quirks = FLEXCAN_QUIRK_BROKEN_WERR_STATE | - FLEXCAN_QUIRK_BROKEN_PERR_STATE, + FLEXCAN_QUIRK_BROKEN_PERR_STATE | + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX | + FLEXCAN_QUIRK_SUPPPORT_RX_FIFO, }; static const struct flexcan_devtype_data fsl_imx28_devtype_data = { - .quirks = FLEXCAN_QUIRK_BROKEN_PERR_STATE, + .quirks = FLEXCAN_QUIRK_BROKEN_PERR_STATE | + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX | + FLEXCAN_QUIRK_SUPPPORT_RX_FIFO, }; static const struct flexcan_devtype_data fsl_imx6q_devtype_data = { .quirks = FLEXCAN_QUIRK_DISABLE_RXFG | FLEXCAN_QUIRK_ENABLE_EACEN_RRS | - FLEXCAN_QUIRK_USE_OFF_TIMESTAMP | FLEXCAN_QUIRK_BROKEN_PERR_STATE | - FLEXCAN_QUIRK_SETUP_STOP_MODE_GPR, + FLEXCAN_QUIRK_USE_RX_MAILBOX | FLEXCAN_QUIRK_BROKEN_PERR_STATE | + FLEXCAN_QUIRK_SETUP_STOP_MODE_GPR | + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX | + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX_RTR, }; static const struct flexcan_devtype_data fsl_imx8qm_devtype_data = { .quirks = FLEXCAN_QUIRK_DISABLE_RXFG | FLEXCAN_QUIRK_ENABLE_EACEN_RRS | - FLEXCAN_QUIRK_USE_OFF_TIMESTAMP | FLEXCAN_QUIRK_BROKEN_PERR_STATE | - FLEXCAN_QUIRK_SUPPORT_FD | FLEXCAN_QUIRK_SETUP_STOP_MODE_SCFW, + FLEXCAN_QUIRK_USE_RX_MAILBOX | FLEXCAN_QUIRK_BROKEN_PERR_STATE | + FLEXCAN_QUIRK_SUPPORT_FD | FLEXCAN_QUIRK_SETUP_STOP_MODE_SCFW | + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX | + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX_RTR, }; static struct flexcan_devtype_data fsl_imx8mp_devtype_data = { .quirks = FLEXCAN_QUIRK_DISABLE_RXFG | FLEXCAN_QUIRK_ENABLE_EACEN_RRS | - FLEXCAN_QUIRK_DISABLE_MECR | FLEXCAN_QUIRK_USE_OFF_TIMESTAMP | + FLEXCAN_QUIRK_DISABLE_MECR | FLEXCAN_QUIRK_USE_RX_MAILBOX | FLEXCAN_QUIRK_BROKEN_PERR_STATE | FLEXCAN_QUIRK_SETUP_STOP_MODE_GPR | - FLEXCAN_QUIRK_SUPPORT_FD | FLEXCAN_QUIRK_SUPPORT_ECC, + FLEXCAN_QUIRK_SUPPORT_FD | FLEXCAN_QUIRK_SUPPORT_ECC | + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX | + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX_RTR, }; static const struct flexcan_devtype_data fsl_vf610_devtype_data = { .quirks = FLEXCAN_QUIRK_DISABLE_RXFG | FLEXCAN_QUIRK_ENABLE_EACEN_RRS | - FLEXCAN_QUIRK_DISABLE_MECR | FLEXCAN_QUIRK_USE_OFF_TIMESTAMP | - FLEXCAN_QUIRK_BROKEN_PERR_STATE | FLEXCAN_QUIRK_SUPPORT_ECC, + FLEXCAN_QUIRK_DISABLE_MECR | FLEXCAN_QUIRK_USE_RX_MAILBOX | + FLEXCAN_QUIRK_BROKEN_PERR_STATE | FLEXCAN_QUIRK_SUPPORT_ECC | + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX | + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX_RTR, }; static const struct flexcan_devtype_data fsl_ls1021a_r2_devtype_data = { .quirks = FLEXCAN_QUIRK_DISABLE_RXFG | FLEXCAN_QUIRK_ENABLE_EACEN_RRS | - FLEXCAN_QUIRK_BROKEN_PERR_STATE | FLEXCAN_QUIRK_USE_OFF_TIMESTAMP, + FLEXCAN_QUIRK_BROKEN_PERR_STATE | FLEXCAN_QUIRK_USE_RX_MAILBOX | + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX | + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX_RTR, }; static const struct flexcan_devtype_data fsl_lx2160a_r1_devtype_data = { .quirks = FLEXCAN_QUIRK_DISABLE_RXFG | FLEXCAN_QUIRK_ENABLE_EACEN_RRS | FLEXCAN_QUIRK_DISABLE_MECR | FLEXCAN_QUIRK_BROKEN_PERR_STATE | - FLEXCAN_QUIRK_USE_OFF_TIMESTAMP | FLEXCAN_QUIRK_SUPPORT_FD | - FLEXCAN_QUIRK_SUPPORT_ECC, + FLEXCAN_QUIRK_USE_RX_MAILBOX | FLEXCAN_QUIRK_SUPPORT_FD | + FLEXCAN_QUIRK_SUPPORT_ECC | + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX | + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX_RTR, }; static const struct can_bittiming_const flexcan_bittiming_const = { @@ -600,7 +528,7 @@ static inline int flexcan_enter_stop_mode(struct flexcan_priv *priv) priv->write(reg_mcr, ®s->mcr); /* enable stop request */ - if (priv->devtype_data->quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_SCFW) { + if (priv->devtype_data.quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_SCFW) { ret = flexcan_stop_mode_enable_scfw(priv, true); if (ret < 0) return ret; @@ -619,7 +547,7 @@ static inline int flexcan_exit_stop_mode(struct flexcan_priv *priv) int ret; /* remove stop request */ - if (priv->devtype_data->quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_SCFW) { + if (priv->devtype_data.quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_SCFW) { ret = flexcan_stop_mode_enable_scfw(priv, false); if (ret < 0) return ret; @@ -1022,7 +950,7 @@ static struct sk_buff *flexcan_mailbox_read(struct can_rx_offload *offload, mb = flexcan_get_mb(priv, n); - if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP) { + if (priv->devtype_data.quirks & FLEXCAN_QUIRK_USE_RX_MAILBOX) { u32 code; do { @@ -1087,7 +1015,7 @@ static struct sk_buff *flexcan_mailbox_read(struct can_rx_offload *offload, } mark_as_read: - if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP) + if (priv->devtype_data.quirks & FLEXCAN_QUIRK_USE_RX_MAILBOX) flexcan_write64(priv, FLEXCAN_IFLAG_MB(n), ®s->iflag1); else priv->write(FLEXCAN_IFLAG_RX_FIFO_AVAILABLE, ®s->iflag1); @@ -1113,7 +1041,7 @@ static irqreturn_t flexcan_irq(int irq, void *dev_id) enum can_state last_state = priv->can.state; /* reception interrupt */ - if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP) { + if (priv->devtype_data.quirks & FLEXCAN_QUIRK_USE_RX_MAILBOX) { u64 reg_iflag_rx; int ret; @@ -1173,7 +1101,7 @@ static irqreturn_t flexcan_irq(int irq, void *dev_id) /* state change interrupt or broken error state quirk fix is enabled */ if ((reg_esr & FLEXCAN_ESR_ERR_STATE) || - (priv->devtype_data->quirks & (FLEXCAN_QUIRK_BROKEN_WERR_STATE | + (priv->devtype_data.quirks & (FLEXCAN_QUIRK_BROKEN_WERR_STATE | FLEXCAN_QUIRK_BROKEN_PERR_STATE))) flexcan_irq_state(dev, reg_esr); @@ -1195,11 +1123,11 @@ static irqreturn_t flexcan_irq(int irq, void *dev_id) * (1): enabled if FLEXCAN_QUIRK_BROKEN_WERR_STATE is enabled */ if ((last_state != priv->can.state) && - (priv->devtype_data->quirks & FLEXCAN_QUIRK_BROKEN_PERR_STATE) && + (priv->devtype_data.quirks & FLEXCAN_QUIRK_BROKEN_PERR_STATE) && !(priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)) { switch (priv->can.state) { case CAN_STATE_ERROR_ACTIVE: - if (priv->devtype_data->quirks & + if (priv->devtype_data.quirks & FLEXCAN_QUIRK_BROKEN_WERR_STATE) flexcan_error_irq_enable(priv); else @@ -1423,26 +1351,26 @@ static int flexcan_rx_offload_setup(struct net_device *dev) else priv->mb_size = sizeof(struct flexcan_mb) + CAN_MAX_DLEN; - if (priv->devtype_data->quirks & FLEXCAN_QUIRK_NR_MB_16) + if (priv->devtype_data.quirks & FLEXCAN_QUIRK_NR_MB_16) priv->mb_count = 16; else priv->mb_count = (sizeof(priv->regs->mb[0]) / priv->mb_size) + (sizeof(priv->regs->mb[1]) / priv->mb_size); - if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP) + if (priv->devtype_data.quirks & FLEXCAN_QUIRK_USE_RX_MAILBOX) priv->tx_mb_reserved = - flexcan_get_mb(priv, FLEXCAN_TX_MB_RESERVED_OFF_TIMESTAMP); + flexcan_get_mb(priv, FLEXCAN_TX_MB_RESERVED_RX_MAILBOX); else priv->tx_mb_reserved = - flexcan_get_mb(priv, FLEXCAN_TX_MB_RESERVED_OFF_FIFO); + flexcan_get_mb(priv, FLEXCAN_TX_MB_RESERVED_RX_FIFO); priv->tx_mb_idx = priv->mb_count - 1; priv->tx_mb = flexcan_get_mb(priv, priv->tx_mb_idx); priv->tx_mask = FLEXCAN_IFLAG_MB(priv->tx_mb_idx); priv->offload.mailbox_read = flexcan_mailbox_read; - if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP) { - priv->offload.mb_first = FLEXCAN_RX_MB_OFF_TIMESTAMP_FIRST; + if (priv->devtype_data.quirks & FLEXCAN_QUIRK_USE_RX_MAILBOX) { + priv->offload.mb_first = FLEXCAN_RX_MB_RX_MAILBOX_FIRST; priv->offload.mb_last = priv->mb_count - 2; priv->rx_mask = GENMASK_ULL(priv->offload.mb_last, @@ -1506,7 +1434,7 @@ static int flexcan_chip_start(struct net_device *dev) if (err) goto out_chip_disable; - if (priv->devtype_data->quirks & FLEXCAN_QUIRK_SUPPORT_ECC) + if (priv->devtype_data.quirks & FLEXCAN_QUIRK_SUPPORT_ECC) flexcan_ram_init(dev); flexcan_set_bittiming(dev); @@ -1532,10 +1460,10 @@ static int flexcan_chip_start(struct net_device *dev) /* MCR * * FIFO: - * - disable for timestamp mode + * - disable for mailbox mode * - enable for FIFO mode */ - if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP) + if (priv->devtype_data.quirks & FLEXCAN_QUIRK_USE_RX_MAILBOX) reg_mcr &= ~FLEXCAN_MCR_FEN; else reg_mcr |= FLEXCAN_MCR_FEN; @@ -1586,7 +1514,7 @@ static int flexcan_chip_start(struct net_device *dev) * on most Flexcan cores, too. Otherwise we don't get * any error warning or passive interrupts. */ - if (priv->devtype_data->quirks & FLEXCAN_QUIRK_BROKEN_WERR_STATE || + if (priv->devtype_data.quirks & FLEXCAN_QUIRK_BROKEN_WERR_STATE || priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING) reg_ctrl |= FLEXCAN_CTRL_ERR_MSK; else @@ -1599,7 +1527,7 @@ static int flexcan_chip_start(struct net_device *dev) netdev_dbg(dev, "%s: writing ctrl=0x%08x", __func__, reg_ctrl); priv->write(reg_ctrl, ®s->ctrl); - if ((priv->devtype_data->quirks & FLEXCAN_QUIRK_ENABLE_EACEN_RRS)) { + if ((priv->devtype_data.quirks & FLEXCAN_QUIRK_ENABLE_EACEN_RRS)) { reg_ctrl2 = priv->read(®s->ctrl2); reg_ctrl2 |= FLEXCAN_CTRL2_EACEN | FLEXCAN_CTRL2_RRS; priv->write(reg_ctrl2, ®s->ctrl2); @@ -1631,7 +1559,7 @@ static int flexcan_chip_start(struct net_device *dev) priv->write(reg_fdctrl, ®s->fdctrl); } - if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP) { + if (priv->devtype_data.quirks & FLEXCAN_QUIRK_USE_RX_MAILBOX) { for (i = priv->offload.mb_first; i <= priv->offload.mb_last; i++) { mb = flexcan_get_mb(priv, i); priv->write(FLEXCAN_MB_CODE_RX_EMPTY, @@ -1639,7 +1567,7 @@ static int flexcan_chip_start(struct net_device *dev) } } else { /* clear and invalidate unused mailboxes first */ - for (i = FLEXCAN_TX_MB_RESERVED_OFF_FIFO; i < priv->mb_count; i++) { + for (i = FLEXCAN_TX_MB_RESERVED_RX_FIFO; i < priv->mb_count; i++) { mb = flexcan_get_mb(priv, i); priv->write(FLEXCAN_MB_CODE_RX_INACTIVE, &mb->can_ctrl); @@ -1659,7 +1587,7 @@ static int flexcan_chip_start(struct net_device *dev) priv->write(0x0, ®s->rx14mask); priv->write(0x0, ®s->rx15mask); - if (priv->devtype_data->quirks & FLEXCAN_QUIRK_DISABLE_RXFG) + if (priv->devtype_data.quirks & FLEXCAN_QUIRK_DISABLE_RXFG) priv->write(0x0, ®s->rxfgmask); /* clear acceptance filters */ @@ -1673,7 +1601,7 @@ static int flexcan_chip_start(struct net_device *dev) * This also works around errata e5295 which generates false * positive memory errors and put the device in freeze mode. */ - if (priv->devtype_data->quirks & FLEXCAN_QUIRK_DISABLE_MECR) { + if (priv->devtype_data.quirks & FLEXCAN_QUIRK_DISABLE_MECR) { /* Follow the protocol as described in "Detection * and Correction of Memory Errors" to write to * MECR register (step 1 - 5) @@ -1799,7 +1727,7 @@ static int flexcan_open(struct net_device *dev) if (err) goto out_can_rx_offload_disable; - if (priv->devtype_data->quirks & FLEXCAN_QUIRK_NR_IRQ_3) { + if (priv->devtype_data.quirks & FLEXCAN_QUIRK_NR_IRQ_3) { err = request_irq(priv->irq_boff, flexcan_irq, IRQF_SHARED, dev->name, dev); if (err) @@ -1845,7 +1773,7 @@ static int flexcan_close(struct net_device *dev) netif_stop_queue(dev); flexcan_chip_interrupts_disable(dev); - if (priv->devtype_data->quirks & FLEXCAN_QUIRK_NR_IRQ_3) { + if (priv->devtype_data.quirks & FLEXCAN_QUIRK_NR_IRQ_3) { free_irq(priv->irq_err, dev); free_irq(priv->irq_boff, dev); } @@ -2051,9 +1979,9 @@ static int flexcan_setup_stop_mode(struct platform_device *pdev) priv = netdev_priv(dev); - if (priv->devtype_data->quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_SCFW) + if (priv->devtype_data.quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_SCFW) ret = flexcan_setup_stop_mode_scfw(pdev); - else if (priv->devtype_data->quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_GPR) + else if (priv->devtype_data.quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_GPR) ret = flexcan_setup_stop_mode_gpr(pdev); else /* return 0 directly if doesn't support stop mode feature */ @@ -2164,8 +2092,25 @@ static int flexcan_probe(struct platform_device *pdev) return -ENODEV; if ((devtype_data->quirks & FLEXCAN_QUIRK_SUPPORT_FD) && - !(devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP)) { - dev_err(&pdev->dev, "CAN-FD mode doesn't work with FIFO mode!\n"); + !((devtype_data->quirks & + (FLEXCAN_QUIRK_USE_RX_MAILBOX | + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX | + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX_RTR | + FLEXCAN_QUIRK_SUPPPORT_RX_FIFO)) == + (FLEXCAN_QUIRK_USE_RX_MAILBOX | + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX | + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX_RTR))) { + dev_err(&pdev->dev, "CAN-FD mode doesn't work in RX-FIFO mode!\n"); + return -EINVAL; + } + + if ((devtype_data->quirks & + (FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX | + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX_RTR)) == + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX_RTR) { + dev_err(&pdev->dev, + "Quirks (0x%08x) inconsistent: RX_MAILBOX_RX supported but not RX_MAILBOX\n", + devtype_data->quirks); return -EINVAL; } @@ -2177,13 +2122,15 @@ static int flexcan_probe(struct platform_device *pdev) SET_NETDEV_DEV(dev, &pdev->dev); dev->netdev_ops = &flexcan_netdev_ops; + flexcan_set_ethtool_ops(dev); dev->irq = irq; dev->flags |= IFF_ECHO; priv = netdev_priv(dev); + priv->devtype_data = *devtype_data; if (of_property_read_bool(pdev->dev.of_node, "big-endian") || - devtype_data->quirks & FLEXCAN_QUIRK_DEFAULT_BIG_ENDIAN) { + priv->devtype_data.quirks & FLEXCAN_QUIRK_DEFAULT_BIG_ENDIAN) { priv->read = flexcan_read_be; priv->write = flexcan_write_be; } else { @@ -2202,10 +2149,9 @@ static int flexcan_probe(struct platform_device *pdev) priv->clk_ipg = clk_ipg; priv->clk_per = clk_per; priv->clk_src = clk_src; - priv->devtype_data = devtype_data; priv->reg_xceiver = reg_xceiver; - if (devtype_data->quirks & FLEXCAN_QUIRK_NR_IRQ_3) { + if (priv->devtype_data.quirks & FLEXCAN_QUIRK_NR_IRQ_3) { priv->irq_boff = platform_get_irq(pdev, 1); if (priv->irq_boff <= 0) { err = -ENODEV; @@ -2218,7 +2164,7 @@ static int flexcan_probe(struct platform_device *pdev) } } - if (priv->devtype_data->quirks & FLEXCAN_QUIRK_SUPPORT_FD) { + if (priv->devtype_data.quirks & FLEXCAN_QUIRK_SUPPORT_FD) { priv->can.ctrlmode_supported |= CAN_CTRLMODE_FD | CAN_CTRLMODE_FD_NON_ISO; priv->can.bittiming_const = &flexcan_fd_bittiming_const; diff --git a/drivers/net/can/flexcan/flexcan-ethtool.c b/drivers/net/can/flexcan/flexcan-ethtool.c new file mode 100644 index 000000000000..3ae535577700 --- /dev/null +++ b/drivers/net/can/flexcan/flexcan-ethtool.c @@ -0,0 +1,114 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* Copyright (c) 2022 Amarula Solutions, Dario Binacchi <dario.binacchi@amarulasolutions.com> + * Copyright (c) 2022 Pengutronix, Marc Kleine-Budde <kernel@pengutronix.de> + * + */ + +#include <linux/can/dev.h> +#include <linux/ethtool.h> +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/platform_device.h> + +#include "flexcan.h" + +static const char flexcan_priv_flags_strings[][ETH_GSTRING_LEN] = { +#define FLEXCAN_PRIV_FLAGS_RX_RTR BIT(0) + "rx-rtr", +}; + +static void +flexcan_get_ringparam(struct net_device *ndev, struct ethtool_ringparam *ring, + struct kernel_ethtool_ringparam *kernel_ring, + struct netlink_ext_ack *ext_ack) +{ + const struct flexcan_priv *priv = netdev_priv(ndev); + + ring->rx_max_pending = priv->mb_count; + ring->tx_max_pending = priv->mb_count; + + if (priv->devtype_data.quirks & FLEXCAN_QUIRK_USE_RX_MAILBOX) + ring->rx_pending = priv->offload.mb_last - + priv->offload.mb_first + 1; + else + ring->rx_pending = 6; /* RX-FIFO depth is fixed */ + + /* the drive currently supports only on TX buffer */ + ring->tx_pending = 1; +} + +static void +flexcan_get_strings(struct net_device *ndev, u32 stringset, u8 *data) +{ + switch (stringset) { + case ETH_SS_PRIV_FLAGS: + memcpy(data, flexcan_priv_flags_strings, + sizeof(flexcan_priv_flags_strings)); + } +} + +static u32 flexcan_get_priv_flags(struct net_device *ndev) +{ + const struct flexcan_priv *priv = netdev_priv(ndev); + u32 priv_flags = 0; + + if (flexcan_active_rx_rtr(priv)) + priv_flags |= FLEXCAN_PRIV_FLAGS_RX_RTR; + + return priv_flags; +} + +static int flexcan_set_priv_flags(struct net_device *ndev, u32 priv_flags) +{ + struct flexcan_priv *priv = netdev_priv(ndev); + u32 quirks = priv->devtype_data.quirks; + + if (priv_flags & FLEXCAN_PRIV_FLAGS_RX_RTR) { + if (flexcan_supports_rx_mailbox_rtr(priv)) + quirks |= FLEXCAN_QUIRK_USE_RX_MAILBOX; + else if (flexcan_supports_rx_fifo(priv)) + quirks &= ~FLEXCAN_QUIRK_USE_RX_MAILBOX; + else + quirks |= FLEXCAN_QUIRK_USE_RX_MAILBOX; + } else { + if (flexcan_supports_rx_mailbox(priv)) + quirks |= FLEXCAN_QUIRK_USE_RX_MAILBOX; + else + quirks &= ~FLEXCAN_QUIRK_USE_RX_MAILBOX; + } + + if (quirks != priv->devtype_data.quirks && netif_running(ndev)) + return -EBUSY; + + priv->devtype_data.quirks = quirks; + + if (!(priv_flags & FLEXCAN_PRIV_FLAGS_RX_RTR) && + !flexcan_active_rx_rtr(priv)) + netdev_info(ndev, + "Activating RX mailbox mode, cannot receive RTR frames.\n"); + + return 0; +} + +static int flexcan_get_sset_count(struct net_device *netdev, int sset) +{ + switch (sset) { + case ETH_SS_PRIV_FLAGS: + return ARRAY_SIZE(flexcan_priv_flags_strings); + default: + return -EOPNOTSUPP; + } +} + +static const struct ethtool_ops flexcan_ethtool_ops = { + .get_ringparam = flexcan_get_ringparam, + .get_strings = flexcan_get_strings, + .get_priv_flags = flexcan_get_priv_flags, + .set_priv_flags = flexcan_set_priv_flags, + .get_sset_count = flexcan_get_sset_count, +}; + +void flexcan_set_ethtool_ops(struct net_device *netdev) +{ + netdev->ethtool_ops = &flexcan_ethtool_ops; +} diff --git a/drivers/net/can/flexcan/flexcan.h b/drivers/net/can/flexcan/flexcan.h new file mode 100644 index 000000000000..fccdff8b1f0f --- /dev/null +++ b/drivers/net/can/flexcan/flexcan.h @@ -0,0 +1,163 @@ +/* SPDX-License-Identifier: GPL-2.0 + * flexcan.c - FLEXCAN CAN controller driver + * + * Copyright (c) 2005-2006 Varma Electronics Oy + * Copyright (c) 2009 Sascha Hauer, Pengutronix + * Copyright (c) 2010-2017 Pengutronix, Marc Kleine-Budde <kernel@pengutronix.de> + * Copyright (c) 2014 David Jander, Protonic Holland + * Copyright (C) 2022 Amarula Solutions, Dario Binacchi <dario.binacchi@amarulasolutions.com> + * + * Based on code originally by Andrey Volkov <avolkov@varma-el.com> + * + */ + +#ifndef _FLEXCAN_H +#define _FLEXCAN_H + +#include <linux/can/rx-offload.h> + +/* FLEXCAN hardware feature flags + * + * Below is some version info we got: + * SOC Version IP-Version Glitch- [TR]WRN_INT IRQ Err Memory err RTR rece- FD Mode MB + * Filter? connected? Passive detection ption in MB Supported? + * MCF5441X FlexCAN2 ? no yes no no yes no 16 + * MX25 FlexCAN2 03.00.00.00 no no no no no no 64 + * MX28 FlexCAN2 03.00.04.00 yes yes no no no no 64 + * MX35 FlexCAN2 03.00.00.00 no no no no no no 64 + * MX53 FlexCAN2 03.00.00.00 yes no no no no no 64 + * MX6s FlexCAN3 10.00.12.00 yes yes no no yes no 64 + * MX8QM FlexCAN3 03.00.23.00 yes yes no no yes yes 64 + * MX8MP FlexCAN3 03.00.17.01 yes yes no yes yes yes 64 + * VF610 FlexCAN3 ? no yes no yes yes? no 64 + * LS1021A FlexCAN2 03.00.04.00 no yes no no yes no 64 + * LX2160A FlexCAN3 03.00.23.00 no yes no yes yes yes 64 + * + * Some SOCs do not have the RX_WARN & TX_WARN interrupt line connected. + */ + +/* [TR]WRN_INT not connected */ +#define FLEXCAN_QUIRK_BROKEN_WERR_STATE BIT(1) + /* Disable RX FIFO Global mask */ +#define FLEXCAN_QUIRK_DISABLE_RXFG BIT(2) +/* Enable EACEN and RRS bit in ctrl2 */ +#define FLEXCAN_QUIRK_ENABLE_EACEN_RRS BIT(3) +/* Disable non-correctable errors interrupt and freeze mode */ +#define FLEXCAN_QUIRK_DISABLE_MECR BIT(4) +/* Use mailboxes (not FIFO) for RX path */ +#define FLEXCAN_QUIRK_USE_RX_MAILBOX BIT(5) +/* No interrupt for error passive */ +#define FLEXCAN_QUIRK_BROKEN_PERR_STATE BIT(6) +/* default to BE register access */ +#define FLEXCAN_QUIRK_DEFAULT_BIG_ENDIAN BIT(7) +/* Setup stop mode with GPR to support wakeup */ +#define FLEXCAN_QUIRK_SETUP_STOP_MODE_GPR BIT(8) +/* Support CAN-FD mode */ +#define FLEXCAN_QUIRK_SUPPORT_FD BIT(9) +/* support memory detection and correction */ +#define FLEXCAN_QUIRK_SUPPORT_ECC BIT(10) +/* Setup stop mode with SCU firmware to support wakeup */ +#define FLEXCAN_QUIRK_SETUP_STOP_MODE_SCFW BIT(11) +/* Setup 3 separate interrupts, main, boff and err */ +#define FLEXCAN_QUIRK_NR_IRQ_3 BIT(12) +/* Setup 16 mailboxes */ +#define FLEXCAN_QUIRK_NR_MB_16 BIT(13) +/* Device supports RX via mailboxes */ +#define FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX BIT(14) +/* Device supports RTR reception via mailboxes */ +#define FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX_RTR BIT(15) +/* Device supports RX via FIFO */ +#define FLEXCAN_QUIRK_SUPPPORT_RX_FIFO BIT(16) + +struct flexcan_devtype_data { + u32 quirks; /* quirks needed for different IP cores */ +}; + +struct flexcan_stop_mode { + struct regmap *gpr; + u8 req_gpr; + u8 req_bit; +}; + +struct flexcan_priv { + struct can_priv can; + struct can_rx_offload offload; + struct device *dev; + + struct flexcan_regs __iomem *regs; + struct flexcan_mb __iomem *tx_mb; + struct flexcan_mb __iomem *tx_mb_reserved; + u8 tx_mb_idx; + u8 mb_count; + u8 mb_size; + u8 clk_src; /* clock source of CAN Protocol Engine */ + u8 scu_idx; + + u64 rx_mask; + u64 tx_mask; + u32 reg_ctrl_default; + + struct clk *clk_ipg; + struct clk *clk_per; + struct flexcan_devtype_data devtype_data; + struct regulator *reg_xceiver; + struct flexcan_stop_mode stm; + + int irq_boff; + int irq_err; + + /* IPC handle when setup stop mode by System Controller firmware(scfw) */ + struct imx_sc_ipc *sc_ipc_handle; + + /* Read and Write APIs */ + u32 (*read)(void __iomem *addr); + void (*write)(u32 val, void __iomem *addr); +}; + +void flexcan_set_ethtool_ops(struct net_device *dev); + +static inline bool +flexcan_supports_rx_mailbox(const struct flexcan_priv *priv) +{ + const u32 quirks = priv->devtype_data.quirks; + + return quirks & FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX; +} + +static inline bool +flexcan_supports_rx_mailbox_rtr(const struct flexcan_priv *priv) +{ + const u32 quirks = priv->devtype_data.quirks; + + return (quirks & (FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX | + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX_RTR)) == + (FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX | + FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX_RTR); +} + +static inline bool +flexcan_supports_rx_fifo(const struct flexcan_priv *priv) +{ + const u32 quirks = priv->devtype_data.quirks; + + return quirks & FLEXCAN_QUIRK_SUPPPORT_RX_FIFO; +} + +static inline bool +flexcan_active_rx_rtr(const struct flexcan_priv *priv) +{ + const u32 quirks = priv->devtype_data.quirks; + + if (quirks & FLEXCAN_QUIRK_USE_RX_MAILBOX) { + if (quirks & FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX_RTR) + return true; + } else { + /* RX-FIFO is always RTR capable */ + return true; + } + + return false; +} + + +#endif /* _FLEXCAN_H */ diff --git a/drivers/net/can/grcan.c b/drivers/net/can/grcan.c index 78e27940b2af..d0c5a7a60daf 100644 --- a/drivers/net/can/grcan.c +++ b/drivers/net/can/grcan.c @@ -255,7 +255,6 @@ struct grcan_priv { struct grcan_dma dma; struct sk_buff **echo_skb; /* We allocate this on our own */ - u8 *txdlc; /* Length of queued frames */ /* The echo skb pointer, pointing into echo_skb and indicating which * frames can be echoed back. See the "Notes on the tx cyclic buffer @@ -515,9 +514,7 @@ static int catch_up_echo_skb(struct net_device *dev, int budget, bool echo) if (echo) { /* Normal echo of messages */ stats->tx_packets++; - stats->tx_bytes += priv->txdlc[i]; - priv->txdlc[i] = 0; - can_get_echo_skb(dev, i, NULL); + stats->tx_bytes += can_get_echo_skb(dev, i, NULL); } else { /* For cleanup of untransmitted messages */ can_free_echo_skb(dev, i, NULL); @@ -1062,16 +1059,10 @@ static int grcan_open(struct net_device *dev) priv->can.echo_skb_max = dma->tx.size; priv->can.echo_skb = priv->echo_skb; - priv->txdlc = kcalloc(dma->tx.size, sizeof(*priv->txdlc), GFP_KERNEL); - if (!priv->txdlc) { - err = -ENOMEM; - goto exit_free_echo_skb; - } - /* Get can device up */ err = open_candev(dev); if (err) - goto exit_free_txdlc; + goto exit_free_echo_skb; err = request_irq(dev->irq, grcan_interrupt, IRQF_SHARED, dev->name, dev); @@ -1093,8 +1084,6 @@ static int grcan_open(struct net_device *dev) exit_close_candev: close_candev(dev); -exit_free_txdlc: - kfree(priv->txdlc); exit_free_echo_skb: kfree(priv->echo_skb); exit_free_dma_buffers: @@ -1129,7 +1118,6 @@ static int grcan_close(struct net_device *dev) priv->can.echo_skb_max = 0; priv->can.echo_skb = NULL; kfree(priv->echo_skb); - kfree(priv->txdlc); return 0; } @@ -1211,11 +1199,11 @@ static int grcan_receive(struct net_device *dev, int budget) shift = GRCAN_MSG_DATA_SHIFT(i); cf->data[i] = (u8)(slot[j] >> shift); } - } - /* Update statistics and read pointer */ + stats->rx_bytes += cf->len; + } stats->rx_packets++; - stats->rx_bytes += cf->len; + netif_receive_skb(skb); rd = grcan_ring_add(rd, GRCAN_MSG_SIZE, dma->rx.size); @@ -1447,7 +1435,6 @@ static netdev_tx_t grcan_start_xmit(struct sk_buff *skb, * can_put_echo_skb would be an error unless other measures are * taken. */ - priv->txdlc[slotindex] = cf->len; /* Store dlc for statistics */ can_put_echo_skb(skb, dev, slotindex, 0); /* Make sure everything is written before allowing hardware to diff --git a/drivers/net/can/ifi_canfd/ifi_canfd.c b/drivers/net/can/ifi_canfd/ifi_canfd.c index 5bb957a26bc6..b0a3473f211d 100644 --- a/drivers/net/can/ifi_canfd/ifi_canfd.c +++ b/drivers/net/can/ifi_canfd/ifi_canfd.c @@ -309,15 +309,15 @@ static void ifi_canfd_read_fifo(struct net_device *ndev) *(u32 *)(cf->data + i) = readl(priv->base + IFI_CANFD_RXFIFO_DATA + i); } + + stats->rx_bytes += cf->len; } + stats->rx_packets++; /* Remove the packet from FIFO */ writel(IFI_CANFD_RXSTCMD_REMOVE_MSG, priv->base + IFI_CANFD_RXSTCMD); writel(rx_irq_mask, priv->base + IFI_CANFD_INTERRUPT); - stats->rx_packets++; - stats->rx_bytes += cf->len; - netif_receive_skb(skb); } @@ -430,8 +430,6 @@ static int ifi_canfd_handle_lec_err(struct net_device *ndev) priv->base + IFI_CANFD_INTERRUPT); writel(IFI_CANFD_ERROR_CTR_ER_ENABLE, priv->base + IFI_CANFD_ERROR_CTR); - stats->rx_packets++; - stats->rx_bytes += cf->len; netif_receive_skb(skb); return 1; @@ -456,7 +454,6 @@ static int ifi_canfd_handle_state_change(struct net_device *ndev, enum can_state new_state) { struct ifi_canfd_priv *priv = netdev_priv(ndev); - struct net_device_stats *stats = &ndev->stats; struct can_frame *cf; struct sk_buff *skb; struct can_berr_counter bec; @@ -522,8 +519,6 @@ static int ifi_canfd_handle_state_change(struct net_device *ndev, break; } - stats->rx_packets++; - stats->rx_bytes += cf->len; netif_receive_skb(skb); return 1; diff --git a/drivers/net/can/janz-ican3.c b/drivers/net/can/janz-ican3.c index 32006dbf5abd..808c105cf8f7 100644 --- a/drivers/net/can/janz-ican3.c +++ b/drivers/net/can/janz-ican3.c @@ -1285,7 +1285,7 @@ static unsigned int ican3_get_echo_skb(struct ican3_dev *mod) { struct sk_buff *skb = skb_dequeue(&mod->echoq); struct can_frame *cf; - u8 dlc; + u8 dlc = 0; /* this should never trigger unless there is a driver bug */ if (!skb) { @@ -1294,7 +1294,8 @@ static unsigned int ican3_get_echo_skb(struct ican3_dev *mod) } cf = (struct can_frame *)skb->data; - dlc = cf->len; + if (!(cf->can_id & CAN_RTR_FLAG)) + dlc = cf->len; /* check flag whether this packet has to be looped back */ if (skb->pkt_type != PACKET_LOOPBACK) { @@ -1421,7 +1422,8 @@ static int ican3_recv_skb(struct ican3_dev *mod) /* update statistics, receive the skb */ stats->rx_packets++; - stats->rx_bytes += cf->len; + if (!(cf->can_id & CAN_RTR_FLAG)) + stats->rx_bytes += cf->len; netif_receive_skb(skb); err_noalloc: diff --git a/drivers/net/can/kvaser_pciefd.c b/drivers/net/can/kvaser_pciefd.c index 74d9899fc904..017f2d36ffc3 100644 --- a/drivers/net/can/kvaser_pciefd.c +++ b/drivers/net/can/kvaser_pciefd.c @@ -248,6 +248,9 @@ MODULE_DESCRIPTION("CAN driver for Kvaser CAN/PCIe devices"); #define KVASER_PCIEFD_SPACK_EWLR BIT(23) #define KVASER_PCIEFD_SPACK_EPLR BIT(24) +/* Kvaser KCAN_EPACK second word */ +#define KVASER_PCIEFD_EPACK_DIR_TX BIT(0) + struct kvaser_pciefd; struct kvaser_pciefd_can { @@ -1182,20 +1185,21 @@ static int kvaser_pciefd_handle_data_packet(struct kvaser_pciefd *pcie, cf->len = can_fd_dlc2len(p->header[1] >> KVASER_PCIEFD_RPACKET_DLC_SHIFT); - if (p->header[0] & KVASER_PCIEFD_RPACKET_RTR) + if (p->header[0] & KVASER_PCIEFD_RPACKET_RTR) { cf->can_id |= CAN_RTR_FLAG; - else + } else { memcpy(cf->data, data, cf->len); + stats->rx_bytes += cf->len; + } + stats->rx_packets++; + shhwtstamps = skb_hwtstamps(skb); shhwtstamps->hwtstamp = ns_to_ktime(div_u64(p->timestamp * 1000, pcie->freq_to_ticks_div)); - stats->rx_bytes += cf->len; - stats->rx_packets++; - return netif_rx(skb); } @@ -1285,7 +1289,10 @@ static int kvaser_pciefd_rx_error_frame(struct kvaser_pciefd_can *can, can->err_rep_cnt++; can->can.can_stats.bus_error++; - stats->rx_errors++; + if (p->header[1] & KVASER_PCIEFD_EPACK_DIR_TX) + stats->tx_errors++; + else + stats->rx_errors++; can->bec.txerr = bec.txerr; can->bec.rxerr = bec.rxerr; @@ -1304,9 +1311,6 @@ static int kvaser_pciefd_rx_error_frame(struct kvaser_pciefd_can *can, cf->data[6] = bec.txerr; cf->data[7] = bec.rxerr; - stats->rx_packets++; - stats->rx_bytes += cf->len; - netif_rx(skb); return 0; } @@ -1504,8 +1508,6 @@ static void kvaser_pciefd_handle_nack_packet(struct kvaser_pciefd_can *can, if (skb) { cf->can_id |= CAN_ERR_BUSERROR; - stats->rx_bytes += cf->len; - stats->rx_packets++; netif_rx(skb); } else { stats->rx_dropped++; diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c index 2470c47b2e31..5b47cd867783 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -204,16 +204,16 @@ enum m_can_reg { /* Interrupts for version 3.0.x */ #define IR_ERR_LEC_30X (IR_STE | IR_FOE | IR_ACKE | IR_BE | IR_CRCE) -#define IR_ERR_BUS_30X (IR_ERR_LEC_30X | IR_WDI | IR_ELO | IR_BEU | \ - IR_BEC | IR_TOO | IR_MRAF | IR_TSW | IR_TEFL | \ - IR_RF1L | IR_RF0L) +#define IR_ERR_BUS_30X (IR_ERR_LEC_30X | IR_WDI | IR_BEU | IR_BEC | \ + IR_TOO | IR_MRAF | IR_TSW | IR_TEFL | IR_RF1L | \ + IR_RF0L) #define IR_ERR_ALL_30X (IR_ERR_STATE | IR_ERR_BUS_30X) /* Interrupts for version >= 3.1.x */ #define IR_ERR_LEC_31X (IR_PED | IR_PEA) -#define IR_ERR_BUS_31X (IR_ERR_LEC_31X | IR_WDI | IR_ELO | IR_BEU | \ - IR_BEC | IR_TOO | IR_MRAF | IR_TSW | IR_TEFL | \ - IR_RF1L | IR_RF0L) +#define IR_ERR_BUS_31X (IR_ERR_LEC_31X | IR_WDI | IR_BEU | IR_BEC | \ + IR_TOO | IR_MRAF | IR_TSW | IR_TEFL | IR_RF1L | \ + IR_RF0L) #define IR_ERR_ALL_31X (IR_ERR_STATE | IR_ERR_BUS_31X) /* Interrupt Line Select (ILS) */ @@ -517,21 +517,23 @@ static int m_can_read_fifo(struct net_device *dev, u32 rxfs) err = m_can_fifo_read(cdev, fgi, M_CAN_FIFO_DATA, cf->data, DIV_ROUND_UP(cf->len, 4)); if (err) - goto out_fail; + goto out_free_skb; + + stats->rx_bytes += cf->len; } + stats->rx_packets++; /* acknowledge rx fifo 0 */ m_can_write(cdev, M_CAN_RXF0A, fgi); - stats->rx_packets++; - stats->rx_bytes += cf->len; - timestamp = FIELD_GET(RX_BUF_RXTS_MASK, fifo_header.dlc); m_can_receive_skb(cdev, skb, timestamp); return 0; +out_free_skb: + kfree_skb(skb); out_fail: netdev_err(dev, "FIFO read returned %d\n", err); return err; @@ -645,9 +647,6 @@ static int m_can_handle_lec_err(struct net_device *dev, break; } - stats->rx_packets++; - stats->rx_bytes += cf->len; - if (cdev->is_peripheral) timestamp = m_can_get_timestamp(cdev); @@ -704,7 +703,6 @@ static int m_can_handle_state_change(struct net_device *dev, enum can_state new_state) { struct m_can_classdev *cdev = netdev_priv(dev); - struct net_device_stats *stats = &dev->stats; struct can_frame *cf; struct sk_buff *skb; struct can_berr_counter bec; @@ -769,9 +767,6 @@ static int m_can_handle_state_change(struct net_device *dev, break; } - stats->rx_packets++; - stats->rx_bytes += cf->len; - if (cdev->is_peripheral) timestamp = m_can_get_timestamp(cdev); @@ -810,8 +805,6 @@ static void m_can_handle_other_err(struct net_device *dev, u32 irqstatus) { if (irqstatus & IR_WDI) netdev_err(dev, "Message RAM Watchdog event due to missing READY\n"); - if (irqstatus & IR_ELO) - netdev_err(dev, "Error Logging Overflow\n"); if (irqstatus & IR_BEU) netdev_err(dev, "Bit Error Uncorrected\n"); if (irqstatus & IR_BEC) @@ -1463,7 +1456,7 @@ static bool m_can_niso_supported(struct m_can_classdev *cdev) static int m_can_dev_setup(struct m_can_classdev *cdev) { struct net_device *dev = cdev->net; - int m_can_version; + int m_can_version, err; m_can_version = m_can_check_core_release(cdev); /* return if unsupported version */ @@ -1493,21 +1486,37 @@ static int m_can_dev_setup(struct m_can_classdev *cdev) switch (cdev->version) { case 30: /* CAN_CTRLMODE_FD_NON_ISO is fixed with M_CAN IP v3.0.x */ - can_set_static_ctrlmode(dev, CAN_CTRLMODE_FD_NON_ISO); - cdev->can.bittiming_const = &m_can_bittiming_const_30X; - cdev->can.data_bittiming_const = &m_can_data_bittiming_const_30X; + err = can_set_static_ctrlmode(dev, CAN_CTRLMODE_FD_NON_ISO); + if (err) + return err; + cdev->can.bittiming_const = cdev->bit_timing ? + cdev->bit_timing : &m_can_bittiming_const_30X; + + cdev->can.data_bittiming_const = cdev->data_timing ? + cdev->data_timing : + &m_can_data_bittiming_const_30X; break; case 31: /* CAN_CTRLMODE_FD_NON_ISO is fixed with M_CAN IP v3.1.x */ - can_set_static_ctrlmode(dev, CAN_CTRLMODE_FD_NON_ISO); - cdev->can.bittiming_const = &m_can_bittiming_const_31X; - cdev->can.data_bittiming_const = &m_can_data_bittiming_const_31X; + err = can_set_static_ctrlmode(dev, CAN_CTRLMODE_FD_NON_ISO); + if (err) + return err; + cdev->can.bittiming_const = cdev->bit_timing ? + cdev->bit_timing : &m_can_bittiming_const_31X; + + cdev->can.data_bittiming_const = cdev->data_timing ? + cdev->data_timing : + &m_can_data_bittiming_const_31X; break; case 32: case 33: /* Support both MCAN version v3.2.x and v3.3.0 */ - cdev->can.bittiming_const = &m_can_bittiming_const_31X; - cdev->can.data_bittiming_const = &m_can_data_bittiming_const_31X; + cdev->can.bittiming_const = cdev->bit_timing ? + cdev->bit_timing : &m_can_bittiming_const_31X; + + cdev->can.data_bittiming_const = cdev->data_timing ? + cdev->data_timing : + &m_can_data_bittiming_const_31X; cdev->can.ctrlmode_supported |= (m_can_niso_supported(cdev) ? diff --git a/drivers/net/can/m_can/m_can.h b/drivers/net/can/m_can/m_can.h index d18b515e6ccc..2c5d40997168 100644 --- a/drivers/net/can/m_can/m_can.h +++ b/drivers/net/can/m_can/m_can.h @@ -85,6 +85,9 @@ struct m_can_classdev { struct sk_buff *tx_skb; struct phy *transceiver; + const struct can_bittiming_const *bit_timing; + const struct can_bittiming_const *data_timing; + struct m_can_ops *ops; int version; diff --git a/drivers/net/can/m_can/m_can_pci.c b/drivers/net/can/m_can/m_can_pci.c index 89cc3d41e952..b56a54d6c5a9 100644 --- a/drivers/net/can/m_can/m_can_pci.c +++ b/drivers/net/can/m_can/m_can_pci.c @@ -18,9 +18,14 @@ #define M_CAN_PCI_MMIO_BAR 0 -#define M_CAN_CLOCK_FREQ_EHL 100000000 #define CTL_CSR_INT_CTL_OFFSET 0x508 +struct m_can_pci_config { + const struct can_bittiming_const *bit_timing; + const struct can_bittiming_const *data_timing; + unsigned int clock_freq; +}; + struct m_can_pci_priv { struct m_can_classdev cdev; @@ -42,8 +47,13 @@ static u32 iomap_read_reg(struct m_can_classdev *cdev, int reg) static int iomap_read_fifo(struct m_can_classdev *cdev, int offset, void *val, size_t val_count) { struct m_can_pci_priv *priv = cdev_to_priv(cdev); + void __iomem *src = priv->base + offset; - ioread32_rep(priv->base + offset, val, val_count); + while (val_count--) { + *(unsigned int *)val = ioread32(src); + val += 4; + src += 4; + } return 0; } @@ -61,8 +71,13 @@ static int iomap_write_fifo(struct m_can_classdev *cdev, int offset, const void *val, size_t val_count) { struct m_can_pci_priv *priv = cdev_to_priv(cdev); + void __iomem *dst = priv->base + offset; - iowrite32_rep(priv->base + offset, val, val_count); + while (val_count--) { + iowrite32(*(unsigned int *)val, dst); + val += 4; + dst += 4; + } return 0; } @@ -74,9 +89,40 @@ static struct m_can_ops m_can_pci_ops = { .read_fifo = iomap_read_fifo, }; +static const struct can_bittiming_const m_can_bittiming_const_ehl = { + .name = KBUILD_MODNAME, + .tseg1_min = 2, /* Time segment 1 = prop_seg + phase_seg1 */ + .tseg1_max = 64, + .tseg2_min = 1, /* Time segment 2 = phase_seg2 */ + .tseg2_max = 128, + .sjw_max = 128, + .brp_min = 1, + .brp_max = 512, + .brp_inc = 1, +}; + +static const struct can_bittiming_const m_can_data_bittiming_const_ehl = { + .name = KBUILD_MODNAME, + .tseg1_min = 2, /* Time segment 1 = prop_seg + phase_seg1 */ + .tseg1_max = 16, + .tseg2_min = 1, /* Time segment 2 = phase_seg2 */ + .tseg2_max = 8, + .sjw_max = 4, + .brp_min = 1, + .brp_max = 32, + .brp_inc = 1, +}; + +static const struct m_can_pci_config m_can_pci_ehl = { + .bit_timing = &m_can_bittiming_const_ehl, + .data_timing = &m_can_data_bittiming_const_ehl, + .clock_freq = 200000000, +}; + static int m_can_pci_probe(struct pci_dev *pci, const struct pci_device_id *id) { struct device *dev = &pci->dev; + const struct m_can_pci_config *cfg; struct m_can_classdev *mcan_class; struct m_can_pci_priv *priv; void __iomem *base; @@ -104,6 +150,8 @@ static int m_can_pci_probe(struct pci_dev *pci, const struct pci_device_id *id) if (!mcan_class) return -ENOMEM; + cfg = (const struct m_can_pci_config *)id->driver_data; + priv = cdev_to_priv(mcan_class); priv->base = base; @@ -115,7 +163,9 @@ static int m_can_pci_probe(struct pci_dev *pci, const struct pci_device_id *id) mcan_class->dev = &pci->dev; mcan_class->net->irq = pci_irq_vector(pci, 0); mcan_class->pm_clock_support = 1; - mcan_class->can.clock.freq = id->driver_data; + mcan_class->bit_timing = cfg->bit_timing; + mcan_class->data_timing = cfg->data_timing; + mcan_class->can.clock.freq = cfg->clock_freq; mcan_class->ops = &m_can_pci_ops; pci_set_drvdata(pci, mcan_class); @@ -168,8 +218,8 @@ static SIMPLE_DEV_PM_OPS(m_can_pci_pm_ops, m_can_pci_suspend, m_can_pci_resume); static const struct pci_device_id m_can_pci_id_table[] = { - { PCI_VDEVICE(INTEL, 0x4bc1), M_CAN_CLOCK_FREQ_EHL, }, - { PCI_VDEVICE(INTEL, 0x4bc2), M_CAN_CLOCK_FREQ_EHL, }, + { PCI_VDEVICE(INTEL, 0x4bc1), (kernel_ulong_t)&m_can_pci_ehl, }, + { PCI_VDEVICE(INTEL, 0x4bc2), (kernel_ulong_t)&m_can_pci_ehl, }, { } /* Terminating Entry */ }; MODULE_DEVICE_TABLE(pci, m_can_pci_id_table); diff --git a/drivers/net/can/mscan/mscan.c b/drivers/net/can/mscan/mscan.c index fa32e418eb29..5b5802fac772 100644 --- a/drivers/net/can/mscan/mscan.c +++ b/drivers/net/can/mscan/mscan.c @@ -401,13 +401,15 @@ static int mscan_rx_poll(struct napi_struct *napi, int quota) continue; } - if (canrflg & MSCAN_RXF) + if (canrflg & MSCAN_RXF) { mscan_get_rx_frame(dev, frame); - else if (canrflg & MSCAN_ERR_IF) + stats->rx_packets++; + if (!(frame->can_id & CAN_RTR_FLAG)) + stats->rx_bytes += frame->len; + } else if (canrflg & MSCAN_ERR_IF) { mscan_get_err_frame(dev, frame, canrflg); + } - stats->rx_packets++; - stats->rx_bytes += frame->len; work_done++; netif_receive_skb(skb); } @@ -446,9 +448,9 @@ static irqreturn_t mscan_isr(int irq, void *dev_id) continue; out_8(®s->cantbsel, mask); - stats->tx_bytes += in_8(®s->tx.dlr); + stats->tx_bytes += can_get_echo_skb(dev, entry->id, + NULL); stats->tx_packets++; - can_get_echo_skb(dev, entry->id, NULL); priv->tx_active &= ~mask; list_del(pos); } diff --git a/drivers/net/can/pch_can.c b/drivers/net/can/pch_can.c index 92a54a5fd4c5..888bef03de09 100644 --- a/drivers/net/can/pch_can.c +++ b/drivers/net/can/pch_can.c @@ -561,9 +561,6 @@ static void pch_can_error(struct net_device *ndev, u32 status) priv->can.state = state; netif_receive_skb(skb); - - stats->rx_packets++; - stats->rx_bytes += cf->len; } static irqreturn_t pch_can_interrupt(int irq, void *dev_id) @@ -680,23 +677,24 @@ static int pch_can_rx_normal(struct net_device *ndev, u32 obj_num, int quota) cf->can_id = id; } - if (id2 & PCH_ID2_DIR) - cf->can_id |= CAN_RTR_FLAG; - cf->len = can_cc_dlc2len((ioread32(&priv->regs-> ifregs[0].mcont)) & 0xF); - for (i = 0; i < cf->len; i += 2) { - data_reg = ioread16(&priv->regs->ifregs[0].data[i / 2]); - cf->data[i] = data_reg; - cf->data[i + 1] = data_reg >> 8; - } + if (id2 & PCH_ID2_DIR) { + cf->can_id |= CAN_RTR_FLAG; + } else { + for (i = 0; i < cf->len; i += 2) { + data_reg = ioread16(&priv->regs->ifregs[0].data[i / 2]); + cf->data[i] = data_reg; + cf->data[i + 1] = data_reg >> 8; + } - netif_receive_skb(skb); - rcv_pkts++; + stats->rx_bytes += cf->len; + } stats->rx_packets++; + rcv_pkts++; quota--; - stats->rx_bytes += cf->len; + netif_receive_skb(skb); pch_fifo_thresh(priv, obj_num); obj_num++; @@ -709,16 +707,13 @@ static void pch_can_tx_complete(struct net_device *ndev, u32 int_stat) { struct pch_can_priv *priv = netdev_priv(ndev); struct net_device_stats *stats = &(priv->ndev->stats); - u32 dlc; - can_get_echo_skb(ndev, int_stat - PCH_RX_OBJ_END - 1, NULL); + stats->tx_bytes += can_get_echo_skb(ndev, int_stat - PCH_RX_OBJ_END - 1, + NULL); + stats->tx_packets++; iowrite32(PCH_CMASK_RX_TX_GET | PCH_CMASK_CLRINTPND, &priv->regs->ifregs[1].cmask); pch_can_rw_msg_obj(&priv->regs->ifregs[1].creq, int_stat); - dlc = can_cc_dlc2len(ioread32(&priv->regs->ifregs[1].mcont) & - PCH_IF_MCONT_DLC); - stats->tx_bytes += dlc; - stats->tx_packets++; if (int_stat == PCH_TX_OBJ_END) netif_wake_queue(ndev); } diff --git a/drivers/net/can/peak_canfd/peak_canfd.c b/drivers/net/can/peak_canfd/peak_canfd.c index d08718e98e11..b2dea360813d 100644 --- a/drivers/net/can/peak_canfd/peak_canfd.c +++ b/drivers/net/can/peak_canfd/peak_canfd.c @@ -266,10 +266,9 @@ static int pucan_handle_can_rx(struct peak_canfd_priv *priv, unsigned long flags; spin_lock_irqsave(&priv->echo_lock, flags); - can_get_echo_skb(priv->ndev, msg->client, NULL); /* count bytes of the echo instead of skb */ - stats->tx_bytes += cf_len; + stats->tx_bytes += can_get_echo_skb(priv->ndev, msg->client, NULL); stats->tx_packets++; /* restart tx queue (a slot is free) */ @@ -310,12 +309,13 @@ static int pucan_handle_can_rx(struct peak_canfd_priv *priv, if (rx_msg_flags & PUCAN_MSG_EXT_ID) cf->can_id |= CAN_EFF_FLAG; - if (rx_msg_flags & PUCAN_MSG_RTR) + if (rx_msg_flags & PUCAN_MSG_RTR) { cf->can_id |= CAN_RTR_FLAG; - else + } else { memcpy(cf->data, msg->d, cf->len); - stats->rx_bytes += cf->len; + stats->rx_bytes += cf->len; + } stats->rx_packets++; pucan_netif_rx(skb, msg->ts_low, msg->ts_high); @@ -409,8 +409,6 @@ static int pucan_handle_status(struct peak_canfd_priv *priv, return -ENOMEM; } - stats->rx_packets++; - stats->rx_bytes += cf->len; pucan_netif_rx(skb, msg->ts_low, msg->ts_high); return 0; @@ -438,8 +436,6 @@ static int pucan_handle_cache_critical(struct peak_canfd_priv *priv) cf->data[6] = priv->bec.txerr; cf->data[7] = priv->bec.rxerr; - stats->rx_bytes += cf->len; - stats->rx_packets++; netif_rx(skb); return 0; diff --git a/drivers/net/can/rcar/rcar_can.c b/drivers/net/can/rcar/rcar_can.c index 8999ec9455ec..33e37395379d 100644 --- a/drivers/net/can/rcar/rcar_can.c +++ b/drivers/net/can/rcar/rcar_can.c @@ -94,7 +94,6 @@ struct rcar_can_priv { struct rcar_can_regs __iomem *regs; struct clk *clk; struct clk *can_clk; - u8 tx_dlc[RCAR_CAN_FIFO_DEPTH]; u32 tx_head; u32 tx_tail; u8 clock_select; @@ -223,7 +222,6 @@ static void tx_failure_cleanup(struct net_device *ndev) static void rcar_can_error(struct net_device *ndev) { struct rcar_can_priv *priv = netdev_priv(ndev); - struct net_device_stats *stats = &ndev->stats; struct can_frame *cf; struct sk_buff *skb; u8 eifr, txerr = 0, rxerr = 0; @@ -362,11 +360,8 @@ static void rcar_can_error(struct net_device *ndev) } } - if (skb) { - stats->rx_packets++; - stats->rx_bytes += cf->len; + if (skb) netif_rx(skb); - } } static void rcar_can_tx_done(struct net_device *ndev) @@ -383,10 +378,11 @@ static void rcar_can_tx_done(struct net_device *ndev) if (priv->tx_head - priv->tx_tail <= unsent) break; stats->tx_packets++; - stats->tx_bytes += priv->tx_dlc[priv->tx_tail % - RCAR_CAN_FIFO_DEPTH]; - priv->tx_dlc[priv->tx_tail % RCAR_CAN_FIFO_DEPTH] = 0; - can_get_echo_skb(ndev, priv->tx_tail % RCAR_CAN_FIFO_DEPTH, NULL); + stats->tx_bytes += + can_get_echo_skb(ndev, + priv->tx_tail % RCAR_CAN_FIFO_DEPTH, + NULL); + priv->tx_tail++; netif_wake_queue(ndev); } @@ -616,7 +612,6 @@ static netdev_tx_t rcar_can_start_xmit(struct sk_buff *skb, writeb(cf->len, &priv->regs->mb[RCAR_CAN_TX_FIFO_MBX].dlc); - priv->tx_dlc[priv->tx_head % RCAR_CAN_FIFO_DEPTH] = cf->len; can_put_echo_skb(skb, ndev, priv->tx_head % RCAR_CAN_FIFO_DEPTH, 0); priv->tx_head++; /* Start Tx: write 0xff to the TFPCR register to increment @@ -666,12 +661,13 @@ static void rcar_can_rx_pkt(struct rcar_can_priv *priv) for (dlc = 0; dlc < cf->len; dlc++) cf->data[dlc] = readb(&priv->regs->mb[RCAR_CAN_RX_FIFO_MBX].data[dlc]); + + stats->rx_bytes += cf->len; } + stats->rx_packets++; can_led_event(priv->ndev, CAN_LED_EVENT_RX); - stats->rx_bytes += cf->len; - stats->rx_packets++; netif_receive_skb(skb); } diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c index ff9d0f5ae0dd..b7dc1c32875f 100644 --- a/drivers/net/can/rcar/rcar_canfd.c +++ b/drivers/net/can/rcar/rcar_canfd.c @@ -502,7 +502,6 @@ struct rcar_canfd_channel { struct rcar_canfd_global *gpriv; /* Controller reference */ void __iomem *base; /* Register base address */ struct napi_struct napi; - u8 tx_len[RCANFD_FIFO_DEPTH]; /* For net stats */ u32 tx_head; /* Incremented on xmit */ u32 tx_tail; /* Incremented on xmit done */ u32 channel; /* Channel number */ @@ -1033,8 +1032,6 @@ static void rcar_canfd_error(struct net_device *ndev, u32 cerfl, /* Clear channel error interrupts that are handled */ rcar_canfd_write(priv->base, RCANFD_CERFL(ch), RCANFD_CERFL_ERR(~cerfl)); - stats->rx_packets++; - stats->rx_bytes += cf->len; netif_rx(skb); } @@ -1051,9 +1048,7 @@ static void rcar_canfd_tx_done(struct net_device *ndev) sent = priv->tx_tail % RCANFD_FIFO_DEPTH; stats->tx_packets++; - stats->tx_bytes += priv->tx_len[sent]; - priv->tx_len[sent] = 0; - can_get_echo_skb(ndev, sent, NULL); + stats->tx_bytes += can_get_echo_skb(ndev, sent, NULL); spin_lock_irqsave(&priv->tx_lock, flags); priv->tx_tail++; @@ -1174,8 +1169,6 @@ static void rcar_canfd_state_change(struct net_device *ndev, rx_state = txerr <= rxerr ? state : 0; can_change_state(ndev, cf, tx_state, rx_state); - stats->rx_packets++; - stats->rx_bytes += cf->len; netif_rx(skb); } } @@ -1465,7 +1458,6 @@ static netdev_tx_t rcar_canfd_start_xmit(struct sk_buff *skb, RCANFD_C_CFDF(ch, RCANFD_CFFIFO_IDX, 0)); } - priv->tx_len[priv->tx_head % RCANFD_FIFO_DEPTH] = cf->len; can_put_echo_skb(skb, ndev, priv->tx_head % RCANFD_FIFO_DEPTH, 0); spin_lock_irqsave(&priv->tx_lock, flags); @@ -1554,7 +1546,8 @@ static void rcar_canfd_rx_pkt(struct rcar_canfd_channel *priv) can_led_event(priv->ndev, CAN_LED_EVENT_RX); - stats->rx_bytes += cf->len; + if (!(cf->can_id & CAN_RTR_FLAG)) + stats->rx_bytes += cf->len; stats->rx_packets++; netif_receive_skb(skb); } @@ -1640,8 +1633,7 @@ static int rcar_canfd_channel_probe(struct rcar_canfd_global *gpriv, u32 ch, ndev = alloc_candev(sizeof(*priv), RCANFD_FIFO_DEPTH); if (!ndev) { dev_err(&pdev->dev, "alloc_candev() failed\n"); - err = -ENOMEM; - goto fail; + return -ENOMEM; } priv = netdev_priv(ndev); @@ -1706,7 +1698,9 @@ static int rcar_canfd_channel_probe(struct rcar_canfd_global *gpriv, u32 ch, &rcar_canfd_data_bittiming_const; /* Controller starts in CAN FD only mode */ - can_set_static_ctrlmode(ndev, CAN_CTRLMODE_FD); + err = can_set_static_ctrlmode(ndev, CAN_CTRLMODE_FD); + if (err) + goto fail; priv->can.ctrlmode_supported = CAN_CTRLMODE_BERR_REPORTING; } else { /* Controller starts in Classical CAN only mode */ @@ -1735,8 +1729,8 @@ static int rcar_canfd_channel_probe(struct rcar_canfd_global *gpriv, u32 ch, fail_candev: netif_napi_del(&priv->napi); - free_candev(ndev); fail: + free_candev(ndev); return err; } diff --git a/drivers/net/can/sja1000/ems_pcmcia.c b/drivers/net/can/sja1000/ems_pcmcia.c index e21b169c14c0..4642b6d4aaf7 100644 --- a/drivers/net/can/sja1000/ems_pcmcia.c +++ b/drivers/net/can/sja1000/ems_pcmcia.c @@ -234,7 +234,12 @@ static int ems_pcmcia_add_card(struct pcmcia_device *pdev, unsigned long base) free_sja1000dev(dev); } - err = request_irq(dev->irq, &ems_pcmcia_interrupt, IRQF_SHARED, + if (!card->channels) { + err = -ENODEV; + goto failure_cleanup; + } + + err = request_irq(pdev->irq, &ems_pcmcia_interrupt, IRQF_SHARED, DRV_NAME, card); if (!err) return 0; diff --git a/drivers/net/can/sja1000/sja1000.c b/drivers/net/can/sja1000/sja1000.c index 3fad54646746..966316479485 100644 --- a/drivers/net/can/sja1000/sja1000.c +++ b/drivers/net/can/sja1000/sja1000.c @@ -372,15 +372,16 @@ static void sja1000_rx(struct net_device *dev) } else { for (i = 0; i < cf->len; i++) cf->data[i] = priv->read_reg(priv, dreg++); + + stats->rx_bytes += cf->len; } + stats->rx_packets++; cf->can_id = id; /* release receive buffer */ sja1000_write_cmdreg(priv, CMD_RRB); - stats->rx_packets++; - stats->rx_bytes += cf->len; netif_rx(skb); can_led_event(dev, CAN_LED_EVENT_RX); @@ -487,8 +488,6 @@ static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status) can_bus_off(dev); } - stats->rx_packets++; - stats->rx_bytes += cf->len; netif_rx(skb); return 0; @@ -528,10 +527,8 @@ irqreturn_t sja1000_interrupt(int irq, void *dev_id) can_free_echo_skb(dev, 0, NULL); } else { /* transmission complete */ - stats->tx_bytes += - priv->read_reg(priv, SJA1000_FI) & 0xf; + stats->tx_bytes += can_get_echo_skb(dev, 0, NULL); stats->tx_packets++; - can_get_echo_skb(dev, 0, NULL); } netif_wake_queue(dev); can_led_event(dev, CAN_LED_EVENT_TX); diff --git a/drivers/net/can/sja1000/sja1000_platform.c b/drivers/net/can/sja1000/sja1000_platform.c index d7c2ec529b8f..f9ec7bd8dfac 100644 --- a/drivers/net/can/sja1000/sja1000_platform.c +++ b/drivers/net/can/sja1000/sja1000_platform.c @@ -17,7 +17,6 @@ #include <linux/io.h> #include <linux/of.h> #include <linux/of_device.h> -#include <linux/of_irq.h> #include "sja1000.h" @@ -234,13 +233,15 @@ static int sp_probe(struct platform_device *pdev) if (!addr) return -ENOMEM; - if (of) - irq = irq_of_parse_and_map(of, 0); - else + if (of) { + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + } else { res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - - if (!irq && !res_irq) - return -ENODEV; + if (!res_irq) + return -ENODEV; + } of_id = of_match_device(sp_of_table, &pdev->dev); if (of_id && of_id->data) { diff --git a/drivers/net/can/slcan.c b/drivers/net/can/slcan.c index 9a4ebda30510..d4c7ce998a34 100644 --- a/drivers/net/can/slcan.c +++ b/drivers/net/can/slcan.c @@ -218,7 +218,9 @@ static void slc_bump(struct slcan *sl) skb_put_data(skb, &cf, sizeof(struct can_frame)); sl->dev->stats.rx_packets++; - sl->dev->stats.rx_bytes += cf.len; + if (!(cf.can_id & CAN_RTR_FLAG)) + sl->dev->stats.rx_bytes += cf.len; + netif_rx_ni(skb); } @@ -288,6 +290,8 @@ static void slc_encaps(struct slcan *sl, struct can_frame *cf) if (!(cf->can_id & CAN_RTR_FLAG)) { for (i = 0; i < cf->len; i++) pos = hex_byte_pack_upper(pos, cf->data[i]); + + sl->dev->stats.tx_bytes += cf->len; } *pos++ = '\r'; @@ -304,7 +308,6 @@ static void slc_encaps(struct slcan *sl, struct can_frame *cf) actual = sl->tty->ops->write(sl->tty, sl->xbuff, pos - sl->xbuff); sl->xleft = (pos - sl->xbuff) - actual; sl->xhead = sl->xbuff + actual; - sl->dev->stats.tx_bytes += cf->len; } /* Write out any remaining transmit buffer. Scheduled when tty is writable */ diff --git a/drivers/net/can/softing/softing_cs.c b/drivers/net/can/softing/softing_cs.c index 2e93ee792373..e5c939b63fa6 100644 --- a/drivers/net/can/softing/softing_cs.c +++ b/drivers/net/can/softing/softing_cs.c @@ -293,7 +293,7 @@ static int softingcs_probe(struct pcmcia_device *pcmcia) return 0; platform_failed: - kfree(dev); + platform_device_put(pdev); mem_failed: pcmcia_bad: pcmcia_failed: diff --git a/drivers/net/can/softing/softing_fw.c b/drivers/net/can/softing/softing_fw.c index 7e1536877993..32286f861a19 100644 --- a/drivers/net/can/softing/softing_fw.c +++ b/drivers/net/can/softing/softing_fw.c @@ -565,18 +565,19 @@ int softing_startstop(struct net_device *dev, int up) if (ret < 0) goto failed; } - /* enable_error_frame */ - /* + + /* enable_error_frame + * * Error reporting is switched off at the moment since * the receiving of them is not yet 100% verified * This should be enabled sooner or later - * - if (error_reporting) { + */ + if (0 && error_reporting) { ret = softing_fct_cmd(card, 51, "enable_error_frame"); if (ret < 0) goto failed; } - */ + /* initialize interface */ iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 2]); iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 4]); diff --git a/drivers/net/can/softing/softing_main.c b/drivers/net/can/softing/softing_main.c index cfc1325aad10..d74e895bddf7 100644 --- a/drivers/net/can/softing/softing_main.c +++ b/drivers/net/can/softing/softing_main.c @@ -282,7 +282,10 @@ static int softing_handle_1(struct softing *card) skb = priv->can.echo_skb[priv->tx.echo_get]; if (skb) skb->tstamp = ktime; - can_get_echo_skb(netdev, priv->tx.echo_get, NULL); + ++netdev->stats.tx_packets; + netdev->stats.tx_bytes += + can_get_echo_skb(netdev, priv->tx.echo_get, + NULL); ++priv->tx.echo_get; if (priv->tx.echo_get >= TX_ECHO_SKB_MAX) priv->tx.echo_get = 0; @@ -290,9 +293,6 @@ static int softing_handle_1(struct softing *card) --priv->tx.pending; if (card->tx.pending) --card->tx.pending; - ++netdev->stats.tx_packets; - if (!(msg.can_id & CAN_RTR_FLAG)) - netdev->stats.tx_bytes += msg.len; } else { int ret; diff --git a/drivers/net/can/spi/hi311x.c b/drivers/net/can/spi/hi311x.c index 89d9c986a229..cfcc14fe3e42 100644 --- a/drivers/net/can/spi/hi311x.c +++ b/drivers/net/can/spi/hi311x.c @@ -25,11 +25,11 @@ #include <linux/interrupt.h> #include <linux/io.h> #include <linux/kernel.h> +#include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/netdevice.h> -#include <linux/of.h> -#include <linux/of_device.h> #include <linux/platform_device.h> +#include <linux/property.h> #include <linux/regulator/consumer.h> #include <linux/slab.h> #include <linux/spi/spi.h> @@ -153,7 +153,6 @@ struct hi3110_priv { u8 *spi_rx_buf; struct sk_buff *tx_skb; - int tx_len; struct workqueue_struct *wq; struct work_struct tx_work; @@ -166,6 +165,8 @@ struct hi3110_priv { #define HI3110_AFTER_SUSPEND_POWER 4 #define HI3110_AFTER_SUSPEND_RESTART 8 int restart_tx; + bool tx_busy; + struct regulator *power; struct regulator *transceiver; struct clk *clk; @@ -175,13 +176,13 @@ static void hi3110_clean(struct net_device *net) { struct hi3110_priv *priv = netdev_priv(net); - if (priv->tx_skb || priv->tx_len) + if (priv->tx_skb || priv->tx_busy) net->stats.tx_errors++; dev_kfree_skb(priv->tx_skb); - if (priv->tx_len) + if (priv->tx_busy) can_free_echo_skb(priv->net, 0, NULL); priv->tx_skb = NULL; - priv->tx_len = 0; + priv->tx_busy = false; } /* Note about handling of error return of hi3110_spi_trans: accessing @@ -343,14 +344,15 @@ static void hi3110_hw_rx(struct spi_device *spi) /* Data length */ frame->len = can_cc_dlc2len(buf[HI3110_FIFO_WOTIME_DLC_OFF] & 0x0F); - if (buf[HI3110_FIFO_WOTIME_ID_OFF + 3] & HI3110_FIFO_WOTIME_ID_RTR) + if (buf[HI3110_FIFO_WOTIME_ID_OFF + 3] & HI3110_FIFO_WOTIME_ID_RTR) { frame->can_id |= CAN_RTR_FLAG; - else + } else { memcpy(frame->data, buf + HI3110_FIFO_WOTIME_DAT_OFF, frame->len); + priv->net->stats.rx_bytes += frame->len; + } priv->net->stats.rx_packets++; - priv->net->stats.rx_bytes += frame->len; can_led_event(priv->net, CAN_LED_EVENT_RX); @@ -368,7 +370,7 @@ static netdev_tx_t hi3110_hard_start_xmit(struct sk_buff *skb, struct hi3110_priv *priv = netdev_priv(net); struct spi_device *spi = priv->spi; - if (priv->tx_skb || priv->tx_len) { + if (priv->tx_skb || priv->tx_busy) { dev_err(&spi->dev, "hard_xmit called while tx busy\n"); return NETDEV_TX_BUSY; } @@ -585,7 +587,7 @@ static void hi3110_tx_work_handler(struct work_struct *ws) } else { frame = (struct can_frame *)priv->tx_skb->data; hi3110_hw_tx(spi, frame); - priv->tx_len = 1 + frame->len; + priv->tx_busy = true; can_put_echo_skb(priv->tx_skb, net, 0, 0); priv->tx_skb = NULL; } @@ -720,14 +722,11 @@ static irqreturn_t hi3110_can_ist(int irq, void *dev_id) } } - if (priv->tx_len && statf & HI3110_STAT_TXMTY) { + if (priv->tx_busy && statf & HI3110_STAT_TXMTY) { net->stats.tx_packets++; - net->stats.tx_bytes += priv->tx_len - 1; + net->stats.tx_bytes += can_get_echo_skb(net, 0, NULL); can_led_event(net, CAN_LED_EVENT_TX); - if (priv->tx_len) { - can_get_echo_skb(net, 0, NULL); - priv->tx_len = 0; - } + priv->tx_busy = false; netif_wake_queue(net); } @@ -754,7 +753,7 @@ static int hi3110_open(struct net_device *net) priv->force_quit = 0; priv->tx_skb = NULL; - priv->tx_len = 0; + priv->tx_busy = false; ret = request_threaded_irq(spi->irq, NULL, hi3110_can_ist, flags, DEVICE_NAME, priv); @@ -828,19 +827,25 @@ MODULE_DEVICE_TABLE(spi, hi3110_id_table); static int hi3110_can_probe(struct spi_device *spi) { - const struct of_device_id *of_id = of_match_device(hi3110_of_match, - &spi->dev); + struct device *dev = &spi->dev; struct net_device *net; struct hi3110_priv *priv; + const void *match; struct clk *clk; - int freq, ret; + u32 freq; + int ret; + + clk = devm_clk_get_optional(&spi->dev, NULL); + if (IS_ERR(clk)) + return dev_err_probe(dev, PTR_ERR(clk), "no CAN clock source defined\n"); - clk = devm_clk_get(&spi->dev, NULL); - if (IS_ERR(clk)) { - dev_err(&spi->dev, "no CAN clock source defined\n"); - return PTR_ERR(clk); + if (clk) { + freq = clk_get_rate(clk); + } else { + ret = device_property_read_u32(dev, "clock-frequency", &freq); + if (ret) + return dev_err_probe(dev, ret, "Failed to get clock-frequency!\n"); } - freq = clk_get_rate(clk); /* Sanity check */ if (freq > 40000000) @@ -851,11 +856,9 @@ static int hi3110_can_probe(struct spi_device *spi) if (!net) return -ENOMEM; - if (!IS_ERR(clk)) { - ret = clk_prepare_enable(clk); - if (ret) - goto out_free; - } + ret = clk_prepare_enable(clk); + if (ret) + goto out_free; net->netdev_ops = &hi3110_netdev_ops; net->flags |= IFF_ECHO; @@ -870,8 +873,9 @@ static int hi3110_can_probe(struct spi_device *spi) CAN_CTRLMODE_LISTENONLY | CAN_CTRLMODE_BERR_REPORTING; - if (of_id) - priv->model = (enum hi3110_model)(uintptr_t)of_id->data; + match = device_get_match_data(dev); + if (match) + priv->model = (enum hi3110_model)(uintptr_t)match; else priv->model = spi_get_device_id(spi)->driver_data; priv->net = net; @@ -918,9 +922,7 @@ static int hi3110_can_probe(struct spi_device *spi) ret = hi3110_hw_probe(spi); if (ret) { - if (ret == -ENODEV) - dev_err(&spi->dev, "Cannot initialize %x. Wrong wiring?\n", - priv->model); + dev_err_probe(dev, ret, "Cannot initialize %x. Wrong wiring?\n", priv->model); goto error_probe; } hi3110_hw_sleep(spi); @@ -938,14 +940,12 @@ static int hi3110_can_probe(struct spi_device *spi) hi3110_power_enable(priv->power, 0); out_clk: - if (!IS_ERR(clk)) - clk_disable_unprepare(clk); + clk_disable_unprepare(clk); out_free: free_candev(net); - dev_err(&spi->dev, "Probe failed, err=%d\n", -ret); - return ret; + return dev_err_probe(dev, ret, "Probe failed\n"); } static int hi3110_can_remove(struct spi_device *spi) @@ -957,8 +957,7 @@ static int hi3110_can_remove(struct spi_device *spi) hi3110_power_enable(priv->power, 0); - if (!IS_ERR(priv->clk)) - clk_disable_unprepare(priv->clk); + clk_disable_unprepare(priv->clk); free_candev(net); diff --git a/drivers/net/can/spi/mcp251x.c b/drivers/net/can/spi/mcp251x.c index 0579ab74f728..025e07cb7439 100644 --- a/drivers/net/can/spi/mcp251x.c +++ b/drivers/net/can/spi/mcp251x.c @@ -237,7 +237,6 @@ struct mcp251x_priv { u8 *spi_rx_buf; struct sk_buff *tx_skb; - int tx_len; struct workqueue_struct *wq; struct work_struct tx_work; @@ -250,6 +249,8 @@ struct mcp251x_priv { #define AFTER_SUSPEND_POWER 4 #define AFTER_SUSPEND_RESTART 8 int restart_tx; + bool tx_busy; + struct regulator *power; struct regulator *transceiver; struct clk *clk; @@ -272,13 +273,13 @@ static void mcp251x_clean(struct net_device *net) { struct mcp251x_priv *priv = netdev_priv(net); - if (priv->tx_skb || priv->tx_len) + if (priv->tx_skb || priv->tx_busy) net->stats.tx_errors++; dev_kfree_skb(priv->tx_skb); - if (priv->tx_len) + if (priv->tx_busy) can_free_echo_skb(priv->net, 0, NULL); priv->tx_skb = NULL; - priv->tx_len = 0; + priv->tx_busy = false; } /* Note about handling of error return of mcp251x_spi_trans: accessing @@ -600,9 +601,6 @@ static int mcp251x_gpio_setup(struct mcp251x_priv *priv) gpio->ngpio = ARRAY_SIZE(mcp251x_gpio_names); gpio->names = mcp251x_gpio_names; gpio->can_sleep = true; -#ifdef CONFIG_OF_GPIO - gpio->of_node = priv->spi->dev.of_node; -#endif return devm_gpiochip_add_data(&priv->spi->dev, gpio, priv); } @@ -733,10 +731,12 @@ static void mcp251x_hw_rx(struct spi_device *spi, int buf_idx) } /* Data length */ frame->len = can_cc_dlc2len(buf[RXBDLC_OFF] & RXBDLC_LEN_MASK); - memcpy(frame->data, buf + RXBDAT_OFF, frame->len); + if (!(frame->can_id & CAN_RTR_FLAG)) { + memcpy(frame->data, buf + RXBDAT_OFF, frame->len); + priv->net->stats.rx_bytes += frame->len; + } priv->net->stats.rx_packets++; - priv->net->stats.rx_bytes += frame->len; can_led_event(priv->net, CAN_LED_EVENT_RX); @@ -786,7 +786,7 @@ static netdev_tx_t mcp251x_hard_start_xmit(struct sk_buff *skb, struct mcp251x_priv *priv = netdev_priv(net); struct spi_device *spi = priv->spi; - if (priv->tx_skb || priv->tx_len) { + if (priv->tx_skb || priv->tx_busy) { dev_warn(&spi->dev, "hard_xmit called while tx busy\n"); return NETDEV_TX_BUSY; } @@ -1011,7 +1011,7 @@ static void mcp251x_tx_work_handler(struct work_struct *ws) if (frame->len > CAN_FRAME_MAX_DATA_LEN) frame->len = CAN_FRAME_MAX_DATA_LEN; mcp251x_hw_tx(spi, frame, 0); - priv->tx_len = 1 + frame->len; + priv->tx_busy = true; can_put_echo_skb(priv->tx_skb, net, 0, 0); priv->tx_skb = NULL; } @@ -1177,12 +1177,12 @@ static irqreturn_t mcp251x_can_ist(int irq, void *dev_id) break; if (intf & CANINTF_TX) { - net->stats.tx_packets++; - net->stats.tx_bytes += priv->tx_len - 1; can_led_event(net, CAN_LED_EVENT_TX); - if (priv->tx_len) { - can_get_echo_skb(net, 0, NULL); - priv->tx_len = 0; + if (priv->tx_busy) { + net->stats.tx_packets++; + net->stats.tx_bytes += can_get_echo_skb(net, 0, + NULL); + priv->tx_busy = false; } netif_wake_queue(net); } @@ -1209,7 +1209,7 @@ static int mcp251x_open(struct net_device *net) priv->force_quit = 0; priv->tx_skb = NULL; - priv->tx_len = 0; + priv->tx_busy = false; if (!dev_fwnode(&spi->dev)) flags = IRQF_TRIGGER_FALLING; diff --git a/drivers/net/can/spi/mcp251xfd/Makefile b/drivers/net/can/spi/mcp251xfd/Makefile index 3cba3b9447ea..a83d685d64e0 100644 --- a/drivers/net/can/spi/mcp251xfd/Makefile +++ b/drivers/net/can/spi/mcp251xfd/Makefile @@ -3,9 +3,14 @@ obj-$(CONFIG_CAN_MCP251XFD) += mcp251xfd.o mcp251xfd-objs := +mcp251xfd-objs += mcp251xfd-chip-fifo.o mcp251xfd-objs += mcp251xfd-core.o mcp251xfd-objs += mcp251xfd-crc16.o mcp251xfd-objs += mcp251xfd-regmap.o +mcp251xfd-objs += mcp251xfd-ring.o +mcp251xfd-objs += mcp251xfd-rx.o +mcp251xfd-objs += mcp251xfd-tef.o mcp251xfd-objs += mcp251xfd-timestamp.o +mcp251xfd-objs += mcp251xfd-tx.o mcp251xfd-$(CONFIG_DEV_COREDUMP) += mcp251xfd-dump.o diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-chip-fifo.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-chip-fifo.c new file mode 100644 index 000000000000..2f9a623d381d --- /dev/null +++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-chip-fifo.c @@ -0,0 +1,119 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// mcp251xfd - Microchip MCP251xFD Family CAN controller driver +// +// Copyright (c) 2019, 2020, 2021 Pengutronix, +// Marc Kleine-Budde <kernel@pengutronix.de> +// +// Based on: +// +// CAN bus driver for Microchip 25XXFD CAN Controller with SPI Interface +// +// Copyright (c) 2019 Martin Sperl <kernel@martin.sperl.org> +// + +#include <linux/bitfield.h> + +#include "mcp251xfd.h" + +static int +mcp251xfd_chip_rx_fifo_init_one(const struct mcp251xfd_priv *priv, + const struct mcp251xfd_rx_ring *ring) +{ + u32 fifo_con; + + /* Enable RXOVIE on _all_ RX FIFOs, not just the last one. + * + * FIFOs hit by a RX MAB overflow and RXOVIE enabled will + * generate a RXOVIF, use this to properly detect RX MAB + * overflows. + */ + fifo_con = FIELD_PREP(MCP251XFD_REG_FIFOCON_FSIZE_MASK, + ring->obj_num - 1) | + MCP251XFD_REG_FIFOCON_RXTSEN | + MCP251XFD_REG_FIFOCON_RXOVIE | + MCP251XFD_REG_FIFOCON_TFNRFNIE; + + if (mcp251xfd_is_fd_mode(priv)) + fifo_con |= FIELD_PREP(MCP251XFD_REG_FIFOCON_PLSIZE_MASK, + MCP251XFD_REG_FIFOCON_PLSIZE_64); + else + fifo_con |= FIELD_PREP(MCP251XFD_REG_FIFOCON_PLSIZE_MASK, + MCP251XFD_REG_FIFOCON_PLSIZE_8); + + return regmap_write(priv->map_reg, + MCP251XFD_REG_FIFOCON(ring->fifo_nr), fifo_con); +} + +static int +mcp251xfd_chip_rx_filter_init_one(const struct mcp251xfd_priv *priv, + const struct mcp251xfd_rx_ring *ring) +{ + u32 fltcon; + + fltcon = MCP251XFD_REG_FLTCON_FLTEN(ring->nr) | + MCP251XFD_REG_FLTCON_FBP(ring->nr, ring->fifo_nr); + + return regmap_update_bits(priv->map_reg, + MCP251XFD_REG_FLTCON(ring->nr >> 2), + MCP251XFD_REG_FLTCON_FLT_MASK(ring->nr), + fltcon); +} + +int mcp251xfd_chip_fifo_init(const struct mcp251xfd_priv *priv) +{ + const struct mcp251xfd_tx_ring *tx_ring = priv->tx; + const struct mcp251xfd_rx_ring *rx_ring; + u32 val; + int err, n; + + /* TEF */ + val = FIELD_PREP(MCP251XFD_REG_TEFCON_FSIZE_MASK, + tx_ring->obj_num - 1) | + MCP251XFD_REG_TEFCON_TEFTSEN | + MCP251XFD_REG_TEFCON_TEFOVIE | + MCP251XFD_REG_TEFCON_TEFNEIE; + + err = regmap_write(priv->map_reg, MCP251XFD_REG_TEFCON, val); + if (err) + return err; + + /* FIFO 1 - TX */ + val = FIELD_PREP(MCP251XFD_REG_FIFOCON_FSIZE_MASK, + tx_ring->obj_num - 1) | + MCP251XFD_REG_FIFOCON_TXEN | + MCP251XFD_REG_FIFOCON_TXATIE; + + if (mcp251xfd_is_fd_mode(priv)) + val |= FIELD_PREP(MCP251XFD_REG_FIFOCON_PLSIZE_MASK, + MCP251XFD_REG_FIFOCON_PLSIZE_64); + else + val |= FIELD_PREP(MCP251XFD_REG_FIFOCON_PLSIZE_MASK, + MCP251XFD_REG_FIFOCON_PLSIZE_8); + + if (priv->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT) + val |= FIELD_PREP(MCP251XFD_REG_FIFOCON_TXAT_MASK, + MCP251XFD_REG_FIFOCON_TXAT_ONE_SHOT); + else + val |= FIELD_PREP(MCP251XFD_REG_FIFOCON_TXAT_MASK, + MCP251XFD_REG_FIFOCON_TXAT_UNLIMITED); + + err = regmap_write(priv->map_reg, + MCP251XFD_REG_FIFOCON(MCP251XFD_TX_FIFO), + val); + if (err) + return err; + + /* RX FIFOs */ + mcp251xfd_for_each_rx_ring(priv, rx_ring, n) { + err = mcp251xfd_chip_rx_fifo_init_one(priv, rx_ring); + if (err) + return err; + + err = mcp251xfd_chip_rx_filter_init_one(priv, rx_ring); + if (err) + return err; + } + + return 0; +} diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c index e16dc482f327..b5986df6eca0 100644 --- a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c +++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c @@ -20,8 +20,6 @@ #include <linux/pm_runtime.h> #include <linux/property.h> -#include <asm/unaligned.h> - #include "mcp251xfd.h" #define DEVICE_NAME "mcp251xfd" @@ -180,330 +178,6 @@ static int mcp251xfd_clks_and_vdd_disable(const struct mcp251xfd_priv *priv) return 0; } -static inline u8 -mcp251xfd_cmd_prepare_write_reg(const struct mcp251xfd_priv *priv, - union mcp251xfd_write_reg_buf *write_reg_buf, - const u16 reg, const u32 mask, const u32 val) -{ - u8 first_byte, last_byte, len; - u8 *data; - __le32 val_le32; - - first_byte = mcp251xfd_first_byte_set(mask); - last_byte = mcp251xfd_last_byte_set(mask); - len = last_byte - first_byte + 1; - - data = mcp251xfd_spi_cmd_write(priv, write_reg_buf, reg + first_byte); - val_le32 = cpu_to_le32(val >> BITS_PER_BYTE * first_byte); - memcpy(data, &val_le32, len); - - if (priv->devtype_data.quirks & MCP251XFD_QUIRK_CRC_REG) { - u16 crc; - - mcp251xfd_spi_cmd_crc_set_len_in_reg(&write_reg_buf->crc.cmd, - len); - /* CRC */ - len += sizeof(write_reg_buf->crc.cmd); - crc = mcp251xfd_crc16_compute(&write_reg_buf->crc, len); - put_unaligned_be16(crc, (void *)write_reg_buf + len); - - /* Total length */ - len += sizeof(write_reg_buf->crc.crc); - } else { - len += sizeof(write_reg_buf->nocrc.cmd); - } - - return len; -} - -static inline int -mcp251xfd_tef_tail_get_from_chip(const struct mcp251xfd_priv *priv, - u8 *tef_tail) -{ - u32 tef_ua; - int err; - - err = regmap_read(priv->map_reg, MCP251XFD_REG_TEFUA, &tef_ua); - if (err) - return err; - - *tef_tail = tef_ua / sizeof(struct mcp251xfd_hw_tef_obj); - - return 0; -} - -static inline int -mcp251xfd_tx_tail_get_from_chip(const struct mcp251xfd_priv *priv, - u8 *tx_tail) -{ - u32 fifo_sta; - int err; - - err = regmap_read(priv->map_reg, - MCP251XFD_REG_FIFOSTA(MCP251XFD_TX_FIFO), - &fifo_sta); - if (err) - return err; - - *tx_tail = FIELD_GET(MCP251XFD_REG_FIFOSTA_FIFOCI_MASK, fifo_sta); - - return 0; -} - -static inline int -mcp251xfd_rx_head_get_from_chip(const struct mcp251xfd_priv *priv, - const struct mcp251xfd_rx_ring *ring, - u8 *rx_head) -{ - u32 fifo_sta; - int err; - - err = regmap_read(priv->map_reg, MCP251XFD_REG_FIFOSTA(ring->fifo_nr), - &fifo_sta); - if (err) - return err; - - *rx_head = FIELD_GET(MCP251XFD_REG_FIFOSTA_FIFOCI_MASK, fifo_sta); - - return 0; -} - -static inline int -mcp251xfd_rx_tail_get_from_chip(const struct mcp251xfd_priv *priv, - const struct mcp251xfd_rx_ring *ring, - u8 *rx_tail) -{ - u32 fifo_ua; - int err; - - err = regmap_read(priv->map_reg, MCP251XFD_REG_FIFOUA(ring->fifo_nr), - &fifo_ua); - if (err) - return err; - - fifo_ua -= ring->base - MCP251XFD_RAM_START; - *rx_tail = fifo_ua / ring->obj_size; - - return 0; -} - -static void -mcp251xfd_tx_ring_init_tx_obj(const struct mcp251xfd_priv *priv, - const struct mcp251xfd_tx_ring *ring, - struct mcp251xfd_tx_obj *tx_obj, - const u8 rts_buf_len, - const u8 n) -{ - struct spi_transfer *xfer; - u16 addr; - - /* FIFO load */ - addr = mcp251xfd_get_tx_obj_addr(ring, n); - if (priv->devtype_data.quirks & MCP251XFD_QUIRK_CRC_TX) - mcp251xfd_spi_cmd_write_crc_set_addr(&tx_obj->buf.crc.cmd, - addr); - else - mcp251xfd_spi_cmd_write_nocrc(&tx_obj->buf.nocrc.cmd, - addr); - - xfer = &tx_obj->xfer[0]; - xfer->tx_buf = &tx_obj->buf; - xfer->len = 0; /* actual len is assigned on the fly */ - xfer->cs_change = 1; - xfer->cs_change_delay.value = 0; - xfer->cs_change_delay.unit = SPI_DELAY_UNIT_NSECS; - - /* FIFO request to send */ - xfer = &tx_obj->xfer[1]; - xfer->tx_buf = &ring->rts_buf; - xfer->len = rts_buf_len; - - /* SPI message */ - spi_message_init_with_transfers(&tx_obj->msg, tx_obj->xfer, - ARRAY_SIZE(tx_obj->xfer)); -} - -static void mcp251xfd_ring_init(struct mcp251xfd_priv *priv) -{ - struct mcp251xfd_tef_ring *tef_ring; - struct mcp251xfd_tx_ring *tx_ring; - struct mcp251xfd_rx_ring *rx_ring, *prev_rx_ring = NULL; - struct mcp251xfd_tx_obj *tx_obj; - struct spi_transfer *xfer; - u32 val; - u16 addr; - u8 len; - int i, j; - - netdev_reset_queue(priv->ndev); - - /* TEF */ - tef_ring = priv->tef; - tef_ring->head = 0; - tef_ring->tail = 0; - - /* FIFO increment TEF tail pointer */ - addr = MCP251XFD_REG_TEFCON; - val = MCP251XFD_REG_TEFCON_UINC; - len = mcp251xfd_cmd_prepare_write_reg(priv, &tef_ring->uinc_buf, - addr, val, val); - - for (j = 0; j < ARRAY_SIZE(tef_ring->uinc_xfer); j++) { - xfer = &tef_ring->uinc_xfer[j]; - xfer->tx_buf = &tef_ring->uinc_buf; - xfer->len = len; - xfer->cs_change = 1; - xfer->cs_change_delay.value = 0; - xfer->cs_change_delay.unit = SPI_DELAY_UNIT_NSECS; - } - - /* "cs_change == 1" on the last transfer results in an active - * chip select after the complete SPI message. This causes the - * controller to interpret the next register access as - * data. Set "cs_change" of the last transfer to "0" to - * properly deactivate the chip select at the end of the - * message. - */ - xfer->cs_change = 0; - - /* TX */ - tx_ring = priv->tx; - tx_ring->head = 0; - tx_ring->tail = 0; - tx_ring->base = mcp251xfd_get_tef_obj_addr(tx_ring->obj_num); - - /* FIFO request to send */ - addr = MCP251XFD_REG_FIFOCON(MCP251XFD_TX_FIFO); - val = MCP251XFD_REG_FIFOCON_TXREQ | MCP251XFD_REG_FIFOCON_UINC; - len = mcp251xfd_cmd_prepare_write_reg(priv, &tx_ring->rts_buf, - addr, val, val); - - mcp251xfd_for_each_tx_obj(tx_ring, tx_obj, i) - mcp251xfd_tx_ring_init_tx_obj(priv, tx_ring, tx_obj, len, i); - - /* RX */ - mcp251xfd_for_each_rx_ring(priv, rx_ring, i) { - rx_ring->head = 0; - rx_ring->tail = 0; - rx_ring->nr = i; - rx_ring->fifo_nr = MCP251XFD_RX_FIFO(i); - - if (!prev_rx_ring) - rx_ring->base = - mcp251xfd_get_tx_obj_addr(tx_ring, - tx_ring->obj_num); - else - rx_ring->base = prev_rx_ring->base + - prev_rx_ring->obj_size * - prev_rx_ring->obj_num; - - prev_rx_ring = rx_ring; - - /* FIFO increment RX tail pointer */ - addr = MCP251XFD_REG_FIFOCON(rx_ring->fifo_nr); - val = MCP251XFD_REG_FIFOCON_UINC; - len = mcp251xfd_cmd_prepare_write_reg(priv, &rx_ring->uinc_buf, - addr, val, val); - - for (j = 0; j < ARRAY_SIZE(rx_ring->uinc_xfer); j++) { - xfer = &rx_ring->uinc_xfer[j]; - xfer->tx_buf = &rx_ring->uinc_buf; - xfer->len = len; - xfer->cs_change = 1; - xfer->cs_change_delay.value = 0; - xfer->cs_change_delay.unit = SPI_DELAY_UNIT_NSECS; - } - - /* "cs_change == 1" on the last transfer results in an - * active chip select after the complete SPI - * message. This causes the controller to interpret - * the next register access as data. Set "cs_change" - * of the last transfer to "0" to properly deactivate - * the chip select at the end of the message. - */ - xfer->cs_change = 0; - } -} - -static void mcp251xfd_ring_free(struct mcp251xfd_priv *priv) -{ - int i; - - for (i = ARRAY_SIZE(priv->rx) - 1; i >= 0; i--) { - kfree(priv->rx[i]); - priv->rx[i] = NULL; - } -} - -static int mcp251xfd_ring_alloc(struct mcp251xfd_priv *priv) -{ - struct mcp251xfd_tx_ring *tx_ring; - struct mcp251xfd_rx_ring *rx_ring; - int tef_obj_size, tx_obj_size, rx_obj_size; - int tx_obj_num; - int ram_free, i; - - tef_obj_size = sizeof(struct mcp251xfd_hw_tef_obj); - /* listen-only mode works like FD mode */ - if (priv->can.ctrlmode & (CAN_CTRLMODE_LISTENONLY | CAN_CTRLMODE_FD)) { - tx_obj_num = MCP251XFD_TX_OBJ_NUM_CANFD; - tx_obj_size = sizeof(struct mcp251xfd_hw_tx_obj_canfd); - rx_obj_size = sizeof(struct mcp251xfd_hw_rx_obj_canfd); - } else { - tx_obj_num = MCP251XFD_TX_OBJ_NUM_CAN; - tx_obj_size = sizeof(struct mcp251xfd_hw_tx_obj_can); - rx_obj_size = sizeof(struct mcp251xfd_hw_rx_obj_can); - } - - tx_ring = priv->tx; - tx_ring->obj_num = tx_obj_num; - tx_ring->obj_size = tx_obj_size; - - ram_free = MCP251XFD_RAM_SIZE - tx_obj_num * - (tef_obj_size + tx_obj_size); - - for (i = 0; - i < ARRAY_SIZE(priv->rx) && ram_free >= rx_obj_size; - i++) { - int rx_obj_num; - - rx_obj_num = ram_free / rx_obj_size; - rx_obj_num = min(1 << (fls(rx_obj_num) - 1), - MCP251XFD_RX_OBJ_NUM_MAX); - - rx_ring = kzalloc(sizeof(*rx_ring) + rx_obj_size * rx_obj_num, - GFP_KERNEL); - if (!rx_ring) { - mcp251xfd_ring_free(priv); - return -ENOMEM; - } - rx_ring->obj_num = rx_obj_num; - rx_ring->obj_size = rx_obj_size; - priv->rx[i] = rx_ring; - - ram_free -= rx_ring->obj_num * rx_ring->obj_size; - } - priv->rx_ring_num = i; - - netdev_dbg(priv->ndev, - "FIFO setup: TEF: %d*%d bytes = %d bytes, TX: %d*%d bytes = %d bytes\n", - tx_obj_num, tef_obj_size, tef_obj_size * tx_obj_num, - tx_obj_num, tx_obj_size, tx_obj_size * tx_obj_num); - - mcp251xfd_for_each_rx_ring(priv, rx_ring, i) { - netdev_dbg(priv->ndev, - "FIFO setup: RX-%d: %d*%d bytes = %d bytes\n", - i, rx_ring->obj_num, rx_ring->obj_size, - rx_ring->obj_size * rx_ring->obj_num); - } - - netdev_dbg(priv->ndev, - "FIFO setup: free: %d bytes\n", - ram_free); - - return 0; -} - static inline int mcp251xfd_chip_get_mode(const struct mcp251xfd_priv *priv, u8 *mode) { @@ -838,108 +512,6 @@ static int mcp251xfd_chip_rx_int_disable(const struct mcp251xfd_priv *priv) return regmap_write(priv->map_reg, MCP251XFD_REG_IOCON, val); } -static int -mcp251xfd_chip_rx_fifo_init_one(const struct mcp251xfd_priv *priv, - const struct mcp251xfd_rx_ring *ring) -{ - u32 fifo_con; - - /* Enable RXOVIE on _all_ RX FIFOs, not just the last one. - * - * FIFOs hit by a RX MAB overflow and RXOVIE enabled will - * generate a RXOVIF, use this to properly detect RX MAB - * overflows. - */ - fifo_con = FIELD_PREP(MCP251XFD_REG_FIFOCON_FSIZE_MASK, - ring->obj_num - 1) | - MCP251XFD_REG_FIFOCON_RXTSEN | - MCP251XFD_REG_FIFOCON_RXOVIE | - MCP251XFD_REG_FIFOCON_TFNRFNIE; - - if (priv->can.ctrlmode & (CAN_CTRLMODE_LISTENONLY | CAN_CTRLMODE_FD)) - fifo_con |= FIELD_PREP(MCP251XFD_REG_FIFOCON_PLSIZE_MASK, - MCP251XFD_REG_FIFOCON_PLSIZE_64); - else - fifo_con |= FIELD_PREP(MCP251XFD_REG_FIFOCON_PLSIZE_MASK, - MCP251XFD_REG_FIFOCON_PLSIZE_8); - - return regmap_write(priv->map_reg, - MCP251XFD_REG_FIFOCON(ring->fifo_nr), fifo_con); -} - -static int -mcp251xfd_chip_rx_filter_init_one(const struct mcp251xfd_priv *priv, - const struct mcp251xfd_rx_ring *ring) -{ - u32 fltcon; - - fltcon = MCP251XFD_REG_FLTCON_FLTEN(ring->nr) | - MCP251XFD_REG_FLTCON_FBP(ring->nr, ring->fifo_nr); - - return regmap_update_bits(priv->map_reg, - MCP251XFD_REG_FLTCON(ring->nr >> 2), - MCP251XFD_REG_FLTCON_FLT_MASK(ring->nr), - fltcon); -} - -static int mcp251xfd_chip_fifo_init(const struct mcp251xfd_priv *priv) -{ - const struct mcp251xfd_tx_ring *tx_ring = priv->tx; - const struct mcp251xfd_rx_ring *rx_ring; - u32 val; - int err, n; - - /* TEF */ - val = FIELD_PREP(MCP251XFD_REG_TEFCON_FSIZE_MASK, - tx_ring->obj_num - 1) | - MCP251XFD_REG_TEFCON_TEFTSEN | - MCP251XFD_REG_TEFCON_TEFOVIE | - MCP251XFD_REG_TEFCON_TEFNEIE; - - err = regmap_write(priv->map_reg, MCP251XFD_REG_TEFCON, val); - if (err) - return err; - - /* FIFO 1 - TX */ - val = FIELD_PREP(MCP251XFD_REG_FIFOCON_FSIZE_MASK, - tx_ring->obj_num - 1) | - MCP251XFD_REG_FIFOCON_TXEN | - MCP251XFD_REG_FIFOCON_TXATIE; - - if (priv->can.ctrlmode & (CAN_CTRLMODE_LISTENONLY | CAN_CTRLMODE_FD)) - val |= FIELD_PREP(MCP251XFD_REG_FIFOCON_PLSIZE_MASK, - MCP251XFD_REG_FIFOCON_PLSIZE_64); - else - val |= FIELD_PREP(MCP251XFD_REG_FIFOCON_PLSIZE_MASK, - MCP251XFD_REG_FIFOCON_PLSIZE_8); - - if (priv->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT) - val |= FIELD_PREP(MCP251XFD_REG_FIFOCON_TXAT_MASK, - MCP251XFD_REG_FIFOCON_TXAT_ONE_SHOT); - else - val |= FIELD_PREP(MCP251XFD_REG_FIFOCON_TXAT_MASK, - MCP251XFD_REG_FIFOCON_TXAT_UNLIMITED); - - err = regmap_write(priv->map_reg, - MCP251XFD_REG_FIFOCON(MCP251XFD_TX_FIFO), - val); - if (err) - return err; - - /* RX FIFOs */ - mcp251xfd_for_each_rx_ring(priv, rx_ring, n) { - err = mcp251xfd_chip_rx_fifo_init_one(priv, rx_ring); - if (err) - return err; - - err = mcp251xfd_chip_rx_filter_init_one(priv, rx_ring); - if (err) - return err; - } - - return 0; -} - static int mcp251xfd_chip_ecc_init(struct mcp251xfd_priv *priv) { struct mcp251xfd_ecc *ecc = &priv->ecc; @@ -968,18 +540,10 @@ static int mcp251xfd_chip_ecc_init(struct mcp251xfd_priv *priv) return err; } -static inline void mcp251xfd_ecc_tefif_successful(struct mcp251xfd_priv *priv) -{ - struct mcp251xfd_ecc *ecc = &priv->ecc; - - ecc->ecc_stat = 0; -} - static u8 mcp251xfd_get_normal_mode(const struct mcp251xfd_priv *priv) { u8 mode; - if (priv->can.ctrlmode & CAN_CTRLMODE_LOOPBACK) mode = MCP251XFD_REG_CON_MODE_INT_LOOPBACK; else if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) @@ -1186,433 +750,6 @@ static int mcp251xfd_get_berr_counter(const struct net_device *ndev, return __mcp251xfd_get_berr_counter(ndev, bec); } -static int mcp251xfd_check_tef_tail(const struct mcp251xfd_priv *priv) -{ - u8 tef_tail_chip, tef_tail; - int err; - - if (!IS_ENABLED(CONFIG_CAN_MCP251XFD_SANITY)) - return 0; - - err = mcp251xfd_tef_tail_get_from_chip(priv, &tef_tail_chip); - if (err) - return err; - - tef_tail = mcp251xfd_get_tef_tail(priv); - if (tef_tail_chip != tef_tail) { - netdev_err(priv->ndev, - "TEF tail of chip (0x%02x) and ours (0x%08x) inconsistent.\n", - tef_tail_chip, tef_tail); - return -EILSEQ; - } - - return 0; -} - -static int -mcp251xfd_check_rx_tail(const struct mcp251xfd_priv *priv, - const struct mcp251xfd_rx_ring *ring) -{ - u8 rx_tail_chip, rx_tail; - int err; - - if (!IS_ENABLED(CONFIG_CAN_MCP251XFD_SANITY)) - return 0; - - err = mcp251xfd_rx_tail_get_from_chip(priv, ring, &rx_tail_chip); - if (err) - return err; - - rx_tail = mcp251xfd_get_rx_tail(ring); - if (rx_tail_chip != rx_tail) { - netdev_err(priv->ndev, - "RX tail of chip (%d) and ours (%d) inconsistent.\n", - rx_tail_chip, rx_tail); - return -EILSEQ; - } - - return 0; -} - -static int -mcp251xfd_handle_tefif_recover(const struct mcp251xfd_priv *priv, const u32 seq) -{ - const struct mcp251xfd_tx_ring *tx_ring = priv->tx; - u32 tef_sta; - int err; - - err = regmap_read(priv->map_reg, MCP251XFD_REG_TEFSTA, &tef_sta); - if (err) - return err; - - if (tef_sta & MCP251XFD_REG_TEFSTA_TEFOVIF) { - netdev_err(priv->ndev, - "Transmit Event FIFO buffer overflow.\n"); - return -ENOBUFS; - } - - netdev_info(priv->ndev, - "Transmit Event FIFO buffer %s. (seq=0x%08x, tef_tail=0x%08x, tef_head=0x%08x, tx_head=0x%08x).\n", - tef_sta & MCP251XFD_REG_TEFSTA_TEFFIF ? - "full" : tef_sta & MCP251XFD_REG_TEFSTA_TEFNEIF ? - "not empty" : "empty", - seq, priv->tef->tail, priv->tef->head, tx_ring->head); - - /* The Sequence Number in the TEF doesn't match our tef_tail. */ - return -EAGAIN; -} - -static int -mcp251xfd_handle_tefif_one(struct mcp251xfd_priv *priv, - const struct mcp251xfd_hw_tef_obj *hw_tef_obj, - unsigned int *frame_len_ptr) -{ - struct net_device_stats *stats = &priv->ndev->stats; - struct sk_buff *skb; - u32 seq, seq_masked, tef_tail_masked, tef_tail; - - seq = FIELD_GET(MCP251XFD_OBJ_FLAGS_SEQ_MCP2518FD_MASK, - hw_tef_obj->flags); - - /* Use the MCP2517FD mask on the MCP2518FD, too. We only - * compare 7 bits, this should be enough to detect - * net-yet-completed, i.e. old TEF objects. - */ - seq_masked = seq & - field_mask(MCP251XFD_OBJ_FLAGS_SEQ_MCP2517FD_MASK); - tef_tail_masked = priv->tef->tail & - field_mask(MCP251XFD_OBJ_FLAGS_SEQ_MCP2517FD_MASK); - if (seq_masked != tef_tail_masked) - return mcp251xfd_handle_tefif_recover(priv, seq); - - tef_tail = mcp251xfd_get_tef_tail(priv); - skb = priv->can.echo_skb[tef_tail]; - if (skb) - mcp251xfd_skb_set_timestamp(priv, skb, hw_tef_obj->ts); - stats->tx_bytes += - can_rx_offload_get_echo_skb(&priv->offload, - tef_tail, hw_tef_obj->ts, - frame_len_ptr); - stats->tx_packets++; - priv->tef->tail++; - - return 0; -} - -static int mcp251xfd_tef_ring_update(struct mcp251xfd_priv *priv) -{ - const struct mcp251xfd_tx_ring *tx_ring = priv->tx; - unsigned int new_head; - u8 chip_tx_tail; - int err; - - err = mcp251xfd_tx_tail_get_from_chip(priv, &chip_tx_tail); - if (err) - return err; - - /* chip_tx_tail, is the next TX-Object send by the HW. - * The new TEF head must be >= the old head, ... - */ - new_head = round_down(priv->tef->head, tx_ring->obj_num) + chip_tx_tail; - if (new_head <= priv->tef->head) - new_head += tx_ring->obj_num; - - /* ... but it cannot exceed the TX head. */ - priv->tef->head = min(new_head, tx_ring->head); - - return mcp251xfd_check_tef_tail(priv); -} - -static inline int -mcp251xfd_tef_obj_read(const struct mcp251xfd_priv *priv, - struct mcp251xfd_hw_tef_obj *hw_tef_obj, - const u8 offset, const u8 len) -{ - const struct mcp251xfd_tx_ring *tx_ring = priv->tx; - const int val_bytes = regmap_get_val_bytes(priv->map_rx); - - if (IS_ENABLED(CONFIG_CAN_MCP251XFD_SANITY) && - (offset > tx_ring->obj_num || - len > tx_ring->obj_num || - offset + len > tx_ring->obj_num)) { - netdev_err(priv->ndev, - "Trying to read to many TEF objects (max=%d, offset=%d, len=%d).\n", - tx_ring->obj_num, offset, len); - return -ERANGE; - } - - return regmap_bulk_read(priv->map_rx, - mcp251xfd_get_tef_obj_addr(offset), - hw_tef_obj, - sizeof(*hw_tef_obj) / val_bytes * len); -} - -static int mcp251xfd_handle_tefif(struct mcp251xfd_priv *priv) -{ - struct mcp251xfd_hw_tef_obj hw_tef_obj[MCP251XFD_TX_OBJ_NUM_MAX]; - unsigned int total_frame_len = 0; - u8 tef_tail, len, l; - int err, i; - - err = mcp251xfd_tef_ring_update(priv); - if (err) - return err; - - tef_tail = mcp251xfd_get_tef_tail(priv); - len = mcp251xfd_get_tef_len(priv); - l = mcp251xfd_get_tef_linear_len(priv); - err = mcp251xfd_tef_obj_read(priv, hw_tef_obj, tef_tail, l); - if (err) - return err; - - if (l < len) { - err = mcp251xfd_tef_obj_read(priv, &hw_tef_obj[l], 0, len - l); - if (err) - return err; - } - - for (i = 0; i < len; i++) { - unsigned int frame_len = 0; - - err = mcp251xfd_handle_tefif_one(priv, &hw_tef_obj[i], &frame_len); - /* -EAGAIN means the Sequence Number in the TEF - * doesn't match our tef_tail. This can happen if we - * read the TEF objects too early. Leave loop let the - * interrupt handler call us again. - */ - if (err == -EAGAIN) - goto out_netif_wake_queue; - if (err) - return err; - - total_frame_len += frame_len; - } - - out_netif_wake_queue: - len = i; /* number of handled goods TEFs */ - if (len) { - struct mcp251xfd_tef_ring *ring = priv->tef; - struct mcp251xfd_tx_ring *tx_ring = priv->tx; - int offset; - - /* Increment the TEF FIFO tail pointer 'len' times in - * a single SPI message. - * - * Note: - * Calculate offset, so that the SPI transfer ends on - * the last message of the uinc_xfer array, which has - * "cs_change == 0", to properly deactivate the chip - * select. - */ - offset = ARRAY_SIZE(ring->uinc_xfer) - len; - err = spi_sync_transfer(priv->spi, - ring->uinc_xfer + offset, len); - if (err) - return err; - - tx_ring->tail += len; - netdev_completed_queue(priv->ndev, len, total_frame_len); - - err = mcp251xfd_check_tef_tail(priv); - if (err) - return err; - } - - mcp251xfd_ecc_tefif_successful(priv); - - if (mcp251xfd_get_tx_free(priv->tx)) { - /* Make sure that anybody stopping the queue after - * this sees the new tx_ring->tail. - */ - smp_mb(); - netif_wake_queue(priv->ndev); - } - - return 0; -} - -static int -mcp251xfd_rx_ring_update(const struct mcp251xfd_priv *priv, - struct mcp251xfd_rx_ring *ring) -{ - u32 new_head; - u8 chip_rx_head; - int err; - - err = mcp251xfd_rx_head_get_from_chip(priv, ring, &chip_rx_head); - if (err) - return err; - - /* chip_rx_head, is the next RX-Object filled by the HW. - * The new RX head must be >= the old head. - */ - new_head = round_down(ring->head, ring->obj_num) + chip_rx_head; - if (new_head <= ring->head) - new_head += ring->obj_num; - - ring->head = new_head; - - return mcp251xfd_check_rx_tail(priv, ring); -} - -static void -mcp251xfd_hw_rx_obj_to_skb(const struct mcp251xfd_priv *priv, - const struct mcp251xfd_hw_rx_obj_canfd *hw_rx_obj, - struct sk_buff *skb) -{ - struct canfd_frame *cfd = (struct canfd_frame *)skb->data; - u8 dlc; - - if (hw_rx_obj->flags & MCP251XFD_OBJ_FLAGS_IDE) { - u32 sid, eid; - - eid = FIELD_GET(MCP251XFD_OBJ_ID_EID_MASK, hw_rx_obj->id); - sid = FIELD_GET(MCP251XFD_OBJ_ID_SID_MASK, hw_rx_obj->id); - - cfd->can_id = CAN_EFF_FLAG | - FIELD_PREP(MCP251XFD_REG_FRAME_EFF_EID_MASK, eid) | - FIELD_PREP(MCP251XFD_REG_FRAME_EFF_SID_MASK, sid); - } else { - cfd->can_id = FIELD_GET(MCP251XFD_OBJ_ID_SID_MASK, - hw_rx_obj->id); - } - - dlc = FIELD_GET(MCP251XFD_OBJ_FLAGS_DLC_MASK, hw_rx_obj->flags); - - /* CANFD */ - if (hw_rx_obj->flags & MCP251XFD_OBJ_FLAGS_FDF) { - - if (hw_rx_obj->flags & MCP251XFD_OBJ_FLAGS_ESI) - cfd->flags |= CANFD_ESI; - - if (hw_rx_obj->flags & MCP251XFD_OBJ_FLAGS_BRS) - cfd->flags |= CANFD_BRS; - - cfd->len = can_fd_dlc2len(dlc); - } else { - if (hw_rx_obj->flags & MCP251XFD_OBJ_FLAGS_RTR) - cfd->can_id |= CAN_RTR_FLAG; - - can_frame_set_cc_len((struct can_frame *)cfd, dlc, - priv->can.ctrlmode); - } - - if (!(hw_rx_obj->flags & MCP251XFD_OBJ_FLAGS_RTR)) - memcpy(cfd->data, hw_rx_obj->data, cfd->len); - - mcp251xfd_skb_set_timestamp(priv, skb, hw_rx_obj->ts); -} - -static int -mcp251xfd_handle_rxif_one(struct mcp251xfd_priv *priv, - struct mcp251xfd_rx_ring *ring, - const struct mcp251xfd_hw_rx_obj_canfd *hw_rx_obj) -{ - struct net_device_stats *stats = &priv->ndev->stats; - struct sk_buff *skb; - struct canfd_frame *cfd; - int err; - - if (hw_rx_obj->flags & MCP251XFD_OBJ_FLAGS_FDF) - skb = alloc_canfd_skb(priv->ndev, &cfd); - else - skb = alloc_can_skb(priv->ndev, (struct can_frame **)&cfd); - - if (!skb) { - stats->rx_dropped++; - return 0; - } - - mcp251xfd_hw_rx_obj_to_skb(priv, hw_rx_obj, skb); - err = can_rx_offload_queue_sorted(&priv->offload, skb, hw_rx_obj->ts); - if (err) - stats->rx_fifo_errors++; - - return 0; -} - -static inline int -mcp251xfd_rx_obj_read(const struct mcp251xfd_priv *priv, - const struct mcp251xfd_rx_ring *ring, - struct mcp251xfd_hw_rx_obj_canfd *hw_rx_obj, - const u8 offset, const u8 len) -{ - const int val_bytes = regmap_get_val_bytes(priv->map_rx); - int err; - - err = regmap_bulk_read(priv->map_rx, - mcp251xfd_get_rx_obj_addr(ring, offset), - hw_rx_obj, - len * ring->obj_size / val_bytes); - - return err; -} - -static int -mcp251xfd_handle_rxif_ring(struct mcp251xfd_priv *priv, - struct mcp251xfd_rx_ring *ring) -{ - struct mcp251xfd_hw_rx_obj_canfd *hw_rx_obj = ring->obj; - u8 rx_tail, len; - int err, i; - - err = mcp251xfd_rx_ring_update(priv, ring); - if (err) - return err; - - while ((len = mcp251xfd_get_rx_linear_len(ring))) { - int offset; - - rx_tail = mcp251xfd_get_rx_tail(ring); - - err = mcp251xfd_rx_obj_read(priv, ring, hw_rx_obj, - rx_tail, len); - if (err) - return err; - - for (i = 0; i < len; i++) { - err = mcp251xfd_handle_rxif_one(priv, ring, - (void *)hw_rx_obj + - i * ring->obj_size); - if (err) - return err; - } - - /* Increment the RX FIFO tail pointer 'len' times in a - * single SPI message. - * - * Note: - * Calculate offset, so that the SPI transfer ends on - * the last message of the uinc_xfer array, which has - * "cs_change == 0", to properly deactivate the chip - * select. - */ - offset = ARRAY_SIZE(ring->uinc_xfer) - len; - err = spi_sync_transfer(priv->spi, - ring->uinc_xfer + offset, len); - if (err) - return err; - - ring->tail += len; - } - - return 0; -} - -static int mcp251xfd_handle_rxif(struct mcp251xfd_priv *priv) -{ - struct mcp251xfd_rx_ring *ring; - int err, n; - - mcp251xfd_for_each_rx_ring(priv, ring, n) { - err = mcp251xfd_handle_rxif_ring(priv, ring); - if (err) - return err; - } - - return 0; -} - static struct sk_buff * mcp251xfd_alloc_can_err_skb(struct mcp251xfd_priv *priv, struct can_frame **cf, u32 *timestamp) @@ -1653,12 +790,15 @@ static int mcp251xfd_handle_rxovif(struct mcp251xfd_priv *priv) /* If SERRIF is active, there was a RX MAB overflow. */ if (priv->regs_status.intf & MCP251XFD_REG_INT_SERRIF) { - netdev_info(priv->ndev, - "RX-%d: MAB overflow detected.\n", - ring->nr); + if (net_ratelimit()) + netdev_dbg(priv->ndev, + "RX-%d: MAB overflow detected.\n", + ring->nr); } else { - netdev_info(priv->ndev, - "RX-%d: FIFO overflow.\n", ring->nr); + if (net_ratelimit()) + netdev_dbg(priv->ndev, + "RX-%d: FIFO overflow.\n", + ring->nr); } err = regmap_update_bits(priv->map_reg, @@ -2311,212 +1451,23 @@ static irqreturn_t mcp251xfd_irq(int irq, void *dev_id) return handled; } -static inline struct -mcp251xfd_tx_obj *mcp251xfd_get_tx_obj_next(struct mcp251xfd_tx_ring *tx_ring) -{ - u8 tx_head; - - tx_head = mcp251xfd_get_tx_head(tx_ring); - - return &tx_ring->obj[tx_head]; -} - -static void -mcp251xfd_tx_obj_from_skb(const struct mcp251xfd_priv *priv, - struct mcp251xfd_tx_obj *tx_obj, - const struct sk_buff *skb, - unsigned int seq) -{ - const struct canfd_frame *cfd = (struct canfd_frame *)skb->data; - struct mcp251xfd_hw_tx_obj_raw *hw_tx_obj; - union mcp251xfd_tx_obj_load_buf *load_buf; - u8 dlc; - u32 id, flags; - int len_sanitized = 0, len; - - if (cfd->can_id & CAN_EFF_FLAG) { - u32 sid, eid; - - sid = FIELD_GET(MCP251XFD_REG_FRAME_EFF_SID_MASK, cfd->can_id); - eid = FIELD_GET(MCP251XFD_REG_FRAME_EFF_EID_MASK, cfd->can_id); - - id = FIELD_PREP(MCP251XFD_OBJ_ID_EID_MASK, eid) | - FIELD_PREP(MCP251XFD_OBJ_ID_SID_MASK, sid); - - flags = MCP251XFD_OBJ_FLAGS_IDE; - } else { - id = FIELD_PREP(MCP251XFD_OBJ_ID_SID_MASK, cfd->can_id); - flags = 0; - } - - /* Use the MCP2518FD mask even on the MCP2517FD. It doesn't - * harm, only the lower 7 bits will be transferred into the - * TEF object. - */ - flags |= FIELD_PREP(MCP251XFD_OBJ_FLAGS_SEQ_MCP2518FD_MASK, seq); - - if (cfd->can_id & CAN_RTR_FLAG) - flags |= MCP251XFD_OBJ_FLAGS_RTR; - else - len_sanitized = canfd_sanitize_len(cfd->len); - - /* CANFD */ - if (can_is_canfd_skb(skb)) { - if (cfd->flags & CANFD_ESI) - flags |= MCP251XFD_OBJ_FLAGS_ESI; - - flags |= MCP251XFD_OBJ_FLAGS_FDF; - - if (cfd->flags & CANFD_BRS) - flags |= MCP251XFD_OBJ_FLAGS_BRS; - - dlc = can_fd_len2dlc(cfd->len); - } else { - dlc = can_get_cc_dlc((struct can_frame *)cfd, - priv->can.ctrlmode); - } - - flags |= FIELD_PREP(MCP251XFD_OBJ_FLAGS_DLC_MASK, dlc); - - load_buf = &tx_obj->buf; - if (priv->devtype_data.quirks & MCP251XFD_QUIRK_CRC_TX) - hw_tx_obj = &load_buf->crc.hw_tx_obj; - else - hw_tx_obj = &load_buf->nocrc.hw_tx_obj; - - put_unaligned_le32(id, &hw_tx_obj->id); - put_unaligned_le32(flags, &hw_tx_obj->flags); - - /* Copy data */ - memcpy(hw_tx_obj->data, cfd->data, cfd->len); - - /* Clear unused data at end of CAN frame */ - if (MCP251XFD_SANITIZE_CAN && len_sanitized) { - int pad_len; - - pad_len = len_sanitized - cfd->len; - if (pad_len) - memset(hw_tx_obj->data + cfd->len, 0x0, pad_len); - } - - /* Number of bytes to be written into the RAM of the controller */ - len = sizeof(hw_tx_obj->id) + sizeof(hw_tx_obj->flags); - if (MCP251XFD_SANITIZE_CAN) - len += round_up(len_sanitized, sizeof(u32)); - else - len += round_up(cfd->len, sizeof(u32)); - - if (priv->devtype_data.quirks & MCP251XFD_QUIRK_CRC_TX) { - u16 crc; - - mcp251xfd_spi_cmd_crc_set_len_in_ram(&load_buf->crc.cmd, - len); - /* CRC */ - len += sizeof(load_buf->crc.cmd); - crc = mcp251xfd_crc16_compute(&load_buf->crc, len); - put_unaligned_be16(crc, (void *)load_buf + len); - - /* Total length */ - len += sizeof(load_buf->crc.crc); - } else { - len += sizeof(load_buf->nocrc.cmd); - } - - tx_obj->xfer[0].len = len; -} - -static int mcp251xfd_tx_obj_write(const struct mcp251xfd_priv *priv, - struct mcp251xfd_tx_obj *tx_obj) -{ - return spi_async(priv->spi, &tx_obj->msg); -} - -static bool mcp251xfd_tx_busy(const struct mcp251xfd_priv *priv, - struct mcp251xfd_tx_ring *tx_ring) -{ - if (mcp251xfd_get_tx_free(tx_ring) > 0) - return false; - - netif_stop_queue(priv->ndev); - - /* Memory barrier before checking tx_free (head and tail) */ - smp_mb(); - - if (mcp251xfd_get_tx_free(tx_ring) == 0) { - netdev_dbg(priv->ndev, - "Stopping tx-queue (tx_head=0x%08x, tx_tail=0x%08x, len=%d).\n", - tx_ring->head, tx_ring->tail, - tx_ring->head - tx_ring->tail); - - return true; - } - - netif_start_queue(priv->ndev); - - return false; -} - -static netdev_tx_t mcp251xfd_start_xmit(struct sk_buff *skb, - struct net_device *ndev) -{ - struct mcp251xfd_priv *priv = netdev_priv(ndev); - struct mcp251xfd_tx_ring *tx_ring = priv->tx; - struct mcp251xfd_tx_obj *tx_obj; - unsigned int frame_len; - u8 tx_head; - int err; - - if (can_dropped_invalid_skb(ndev, skb)) - return NETDEV_TX_OK; - - if (mcp251xfd_tx_busy(priv, tx_ring)) - return NETDEV_TX_BUSY; - - tx_obj = mcp251xfd_get_tx_obj_next(tx_ring); - mcp251xfd_tx_obj_from_skb(priv, tx_obj, skb, tx_ring->head); - - /* Stop queue if we occupy the complete TX FIFO */ - tx_head = mcp251xfd_get_tx_head(tx_ring); - tx_ring->head++; - if (mcp251xfd_get_tx_free(tx_ring) == 0) - netif_stop_queue(ndev); - - frame_len = can_skb_get_frame_len(skb); - err = can_put_echo_skb(skb, ndev, tx_head, frame_len); - if (!err) - netdev_sent_queue(priv->ndev, frame_len); - - err = mcp251xfd_tx_obj_write(priv, tx_obj); - if (err) - goto out_err; - - return NETDEV_TX_OK; - - out_err: - netdev_err(priv->ndev, "ERROR in %s: %d\n", __func__, err); - - return NETDEV_TX_OK; -} - static int mcp251xfd_open(struct net_device *ndev) { struct mcp251xfd_priv *priv = netdev_priv(ndev); const struct spi_device *spi = priv->spi; int err; - err = pm_runtime_get_sync(ndev->dev.parent); - if (err < 0) { - pm_runtime_put_noidle(ndev->dev.parent); + err = open_candev(ndev); + if (err) return err; - } - err = open_candev(ndev); + err = pm_runtime_resume_and_get(ndev->dev.parent); if (err) - goto out_pm_runtime_put; + goto out_close_candev; err = mcp251xfd_ring_alloc(priv); if (err) - goto out_close_candev; + goto out_pm_runtime_put; err = mcp251xfd_transceiver_enable(priv); if (err) @@ -2552,11 +1503,11 @@ static int mcp251xfd_open(struct net_device *ndev) mcp251xfd_transceiver_disable(priv); out_mcp251xfd_ring_free: mcp251xfd_ring_free(priv); - out_close_candev: - close_candev(ndev); out_pm_runtime_put: mcp251xfd_chip_stop(priv, CAN_STATE_STOPPED); pm_runtime_put(ndev->dev.parent); + out_close_candev: + close_candev(ndev); return err; } @@ -2625,7 +1576,7 @@ static int mcp251xfd_register_chip_detect(struct mcp251xfd_priv *priv) if (!mcp251xfd_is_251X(priv) && priv->devtype_data.model != devtype_data->model) { netdev_info(ndev, - "Detected %s, but firmware specifies a %s. Fixing up.", + "Detected %s, but firmware specifies a %s. Fixing up.\n", __mcp251xfd_get_model_str(devtype_data->model), mcp251xfd_get_model_str(priv)); } @@ -2662,7 +1613,7 @@ static int mcp251xfd_register_check_rx_int(struct mcp251xfd_priv *priv) return 0; netdev_info(priv->ndev, - "RX_INT active after softreset, disabling RX_INT support."); + "RX_INT active after softreset, disabling RX_INT support.\n"); devm_gpiod_put(&priv->spi->dev, priv->rx_int); priv->rx_int = NULL; diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-regmap.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-regmap.c index 297491516a26..7b120c716228 100644 --- a/drivers/net/can/spi/mcp251xfd/mcp251xfd-regmap.c +++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-regmap.c @@ -250,7 +250,6 @@ mcp251xfd_regmap_crc_read_check_crc(const struct mcp251xfd_map_buf_crc * const b return 0; } - static int mcp251xfd_regmap_crc_read_one(struct mcp251xfd_priv *priv, struct spi_message *msg, unsigned int data_len) diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-ring.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-ring.c new file mode 100644 index 000000000000..92f9e9b01289 --- /dev/null +++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-ring.c @@ -0,0 +1,269 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// mcp251xfd - Microchip MCP251xFD Family CAN controller driver +// +// Copyright (c) 2019, 2020, 2021 Pengutronix, +// Marc Kleine-Budde <kernel@pengutronix.de> +// +// Based on: +// +// CAN bus driver for Microchip 25XXFD CAN Controller with SPI Interface +// +// Copyright (c) 2019 Martin Sperl <kernel@martin.sperl.org> +// + +#include <asm/unaligned.h> + +#include "mcp251xfd.h" + +static inline u8 +mcp251xfd_cmd_prepare_write_reg(const struct mcp251xfd_priv *priv, + union mcp251xfd_write_reg_buf *write_reg_buf, + const u16 reg, const u32 mask, const u32 val) +{ + u8 first_byte, last_byte, len; + u8 *data; + __le32 val_le32; + + first_byte = mcp251xfd_first_byte_set(mask); + last_byte = mcp251xfd_last_byte_set(mask); + len = last_byte - first_byte + 1; + + data = mcp251xfd_spi_cmd_write(priv, write_reg_buf, reg + first_byte); + val_le32 = cpu_to_le32(val >> BITS_PER_BYTE * first_byte); + memcpy(data, &val_le32, len); + + if (priv->devtype_data.quirks & MCP251XFD_QUIRK_CRC_REG) { + u16 crc; + + mcp251xfd_spi_cmd_crc_set_len_in_reg(&write_reg_buf->crc.cmd, + len); + /* CRC */ + len += sizeof(write_reg_buf->crc.cmd); + crc = mcp251xfd_crc16_compute(&write_reg_buf->crc, len); + put_unaligned_be16(crc, (void *)write_reg_buf + len); + + /* Total length */ + len += sizeof(write_reg_buf->crc.crc); + } else { + len += sizeof(write_reg_buf->nocrc.cmd); + } + + return len; +} + +static void +mcp251xfd_tx_ring_init_tx_obj(const struct mcp251xfd_priv *priv, + const struct mcp251xfd_tx_ring *ring, + struct mcp251xfd_tx_obj *tx_obj, + const u8 rts_buf_len, + const u8 n) +{ + struct spi_transfer *xfer; + u16 addr; + + /* FIFO load */ + addr = mcp251xfd_get_tx_obj_addr(ring, n); + if (priv->devtype_data.quirks & MCP251XFD_QUIRK_CRC_TX) + mcp251xfd_spi_cmd_write_crc_set_addr(&tx_obj->buf.crc.cmd, + addr); + else + mcp251xfd_spi_cmd_write_nocrc(&tx_obj->buf.nocrc.cmd, + addr); + + xfer = &tx_obj->xfer[0]; + xfer->tx_buf = &tx_obj->buf; + xfer->len = 0; /* actual len is assigned on the fly */ + xfer->cs_change = 1; + xfer->cs_change_delay.value = 0; + xfer->cs_change_delay.unit = SPI_DELAY_UNIT_NSECS; + + /* FIFO request to send */ + xfer = &tx_obj->xfer[1]; + xfer->tx_buf = &ring->rts_buf; + xfer->len = rts_buf_len; + + /* SPI message */ + spi_message_init_with_transfers(&tx_obj->msg, tx_obj->xfer, + ARRAY_SIZE(tx_obj->xfer)); +} + +void mcp251xfd_ring_init(struct mcp251xfd_priv *priv) +{ + struct mcp251xfd_tef_ring *tef_ring; + struct mcp251xfd_tx_ring *tx_ring; + struct mcp251xfd_rx_ring *rx_ring, *prev_rx_ring = NULL; + struct mcp251xfd_tx_obj *tx_obj; + struct spi_transfer *xfer; + u32 val; + u16 addr; + u8 len; + int i, j; + + netdev_reset_queue(priv->ndev); + + /* TEF */ + tef_ring = priv->tef; + tef_ring->head = 0; + tef_ring->tail = 0; + + /* FIFO increment TEF tail pointer */ + addr = MCP251XFD_REG_TEFCON; + val = MCP251XFD_REG_TEFCON_UINC; + len = mcp251xfd_cmd_prepare_write_reg(priv, &tef_ring->uinc_buf, + addr, val, val); + + for (j = 0; j < ARRAY_SIZE(tef_ring->uinc_xfer); j++) { + xfer = &tef_ring->uinc_xfer[j]; + xfer->tx_buf = &tef_ring->uinc_buf; + xfer->len = len; + xfer->cs_change = 1; + xfer->cs_change_delay.value = 0; + xfer->cs_change_delay.unit = SPI_DELAY_UNIT_NSECS; + } + + /* "cs_change == 1" on the last transfer results in an active + * chip select after the complete SPI message. This causes the + * controller to interpret the next register access as + * data. Set "cs_change" of the last transfer to "0" to + * properly deactivate the chip select at the end of the + * message. + */ + xfer->cs_change = 0; + + /* TX */ + tx_ring = priv->tx; + tx_ring->head = 0; + tx_ring->tail = 0; + tx_ring->base = mcp251xfd_get_tef_obj_addr(tx_ring->obj_num); + + /* FIFO request to send */ + addr = MCP251XFD_REG_FIFOCON(MCP251XFD_TX_FIFO); + val = MCP251XFD_REG_FIFOCON_TXREQ | MCP251XFD_REG_FIFOCON_UINC; + len = mcp251xfd_cmd_prepare_write_reg(priv, &tx_ring->rts_buf, + addr, val, val); + + mcp251xfd_for_each_tx_obj(tx_ring, tx_obj, i) + mcp251xfd_tx_ring_init_tx_obj(priv, tx_ring, tx_obj, len, i); + + /* RX */ + mcp251xfd_for_each_rx_ring(priv, rx_ring, i) { + rx_ring->head = 0; + rx_ring->tail = 0; + rx_ring->nr = i; + rx_ring->fifo_nr = MCP251XFD_RX_FIFO(i); + + if (!prev_rx_ring) + rx_ring->base = + mcp251xfd_get_tx_obj_addr(tx_ring, + tx_ring->obj_num); + else + rx_ring->base = prev_rx_ring->base + + prev_rx_ring->obj_size * + prev_rx_ring->obj_num; + + prev_rx_ring = rx_ring; + + /* FIFO increment RX tail pointer */ + addr = MCP251XFD_REG_FIFOCON(rx_ring->fifo_nr); + val = MCP251XFD_REG_FIFOCON_UINC; + len = mcp251xfd_cmd_prepare_write_reg(priv, &rx_ring->uinc_buf, + addr, val, val); + + for (j = 0; j < ARRAY_SIZE(rx_ring->uinc_xfer); j++) { + xfer = &rx_ring->uinc_xfer[j]; + xfer->tx_buf = &rx_ring->uinc_buf; + xfer->len = len; + xfer->cs_change = 1; + xfer->cs_change_delay.value = 0; + xfer->cs_change_delay.unit = SPI_DELAY_UNIT_NSECS; + } + + /* "cs_change == 1" on the last transfer results in an + * active chip select after the complete SPI + * message. This causes the controller to interpret + * the next register access as data. Set "cs_change" + * of the last transfer to "0" to properly deactivate + * the chip select at the end of the message. + */ + xfer->cs_change = 0; + } +} + +void mcp251xfd_ring_free(struct mcp251xfd_priv *priv) +{ + int i; + + for (i = ARRAY_SIZE(priv->rx) - 1; i >= 0; i--) { + kfree(priv->rx[i]); + priv->rx[i] = NULL; + } +} + +int mcp251xfd_ring_alloc(struct mcp251xfd_priv *priv) +{ + struct mcp251xfd_tx_ring *tx_ring; + struct mcp251xfd_rx_ring *rx_ring; + int tef_obj_size, tx_obj_size, rx_obj_size; + int tx_obj_num; + int ram_free, i; + + tef_obj_size = sizeof(struct mcp251xfd_hw_tef_obj); + if (mcp251xfd_is_fd_mode(priv)) { + tx_obj_num = MCP251XFD_TX_OBJ_NUM_CANFD; + tx_obj_size = sizeof(struct mcp251xfd_hw_tx_obj_canfd); + rx_obj_size = sizeof(struct mcp251xfd_hw_rx_obj_canfd); + } else { + tx_obj_num = MCP251XFD_TX_OBJ_NUM_CAN; + tx_obj_size = sizeof(struct mcp251xfd_hw_tx_obj_can); + rx_obj_size = sizeof(struct mcp251xfd_hw_rx_obj_can); + } + + tx_ring = priv->tx; + tx_ring->obj_num = tx_obj_num; + tx_ring->obj_size = tx_obj_size; + + ram_free = MCP251XFD_RAM_SIZE - tx_obj_num * + (tef_obj_size + tx_obj_size); + + for (i = 0; + i < ARRAY_SIZE(priv->rx) && ram_free >= rx_obj_size; + i++) { + int rx_obj_num; + + rx_obj_num = ram_free / rx_obj_size; + rx_obj_num = min(1 << (fls(rx_obj_num) - 1), + MCP251XFD_RX_OBJ_NUM_MAX); + + rx_ring = kzalloc(sizeof(*rx_ring) + rx_obj_size * rx_obj_num, + GFP_KERNEL); + if (!rx_ring) { + mcp251xfd_ring_free(priv); + return -ENOMEM; + } + rx_ring->obj_num = rx_obj_num; + rx_ring->obj_size = rx_obj_size; + priv->rx[i] = rx_ring; + + ram_free -= rx_ring->obj_num * rx_ring->obj_size; + } + priv->rx_ring_num = i; + + netdev_dbg(priv->ndev, + "FIFO setup: TEF: %d*%d bytes = %d bytes, TX: %d*%d bytes = %d bytes\n", + tx_obj_num, tef_obj_size, tef_obj_size * tx_obj_num, + tx_obj_num, tx_obj_size, tx_obj_size * tx_obj_num); + + mcp251xfd_for_each_rx_ring(priv, rx_ring, i) { + netdev_dbg(priv->ndev, + "FIFO setup: RX-%d: %d*%d bytes = %d bytes\n", + i, rx_ring->obj_num, rx_ring->obj_size, + rx_ring->obj_size * rx_ring->obj_num); + } + + netdev_dbg(priv->ndev, + "FIFO setup: free: %d bytes\n", + ram_free); + + return 0; +} diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-rx.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-rx.c new file mode 100644 index 000000000000..63f2526464b3 --- /dev/null +++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-rx.c @@ -0,0 +1,260 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// mcp251xfd - Microchip MCP251xFD Family CAN controller driver +// +// Copyright (c) 2019, 2020, 2021 Pengutronix, +// Marc Kleine-Budde <kernel@pengutronix.de> +// +// Based on: +// +// CAN bus driver for Microchip 25XXFD CAN Controller with SPI Interface +// +// Copyright (c) 2019 Martin Sperl <kernel@martin.sperl.org> +// + +#include <linux/bitfield.h> + +#include "mcp251xfd.h" + +static inline int +mcp251xfd_rx_head_get_from_chip(const struct mcp251xfd_priv *priv, + const struct mcp251xfd_rx_ring *ring, + u8 *rx_head) +{ + u32 fifo_sta; + int err; + + err = regmap_read(priv->map_reg, MCP251XFD_REG_FIFOSTA(ring->fifo_nr), + &fifo_sta); + if (err) + return err; + + *rx_head = FIELD_GET(MCP251XFD_REG_FIFOSTA_FIFOCI_MASK, fifo_sta); + + return 0; +} + +static inline int +mcp251xfd_rx_tail_get_from_chip(const struct mcp251xfd_priv *priv, + const struct mcp251xfd_rx_ring *ring, + u8 *rx_tail) +{ + u32 fifo_ua; + int err; + + err = regmap_read(priv->map_reg, MCP251XFD_REG_FIFOUA(ring->fifo_nr), + &fifo_ua); + if (err) + return err; + + fifo_ua -= ring->base - MCP251XFD_RAM_START; + *rx_tail = fifo_ua / ring->obj_size; + + return 0; +} + +static int +mcp251xfd_check_rx_tail(const struct mcp251xfd_priv *priv, + const struct mcp251xfd_rx_ring *ring) +{ + u8 rx_tail_chip, rx_tail; + int err; + + if (!IS_ENABLED(CONFIG_CAN_MCP251XFD_SANITY)) + return 0; + + err = mcp251xfd_rx_tail_get_from_chip(priv, ring, &rx_tail_chip); + if (err) + return err; + + rx_tail = mcp251xfd_get_rx_tail(ring); + if (rx_tail_chip != rx_tail) { + netdev_err(priv->ndev, + "RX tail of chip (%d) and ours (%d) inconsistent.\n", + rx_tail_chip, rx_tail); + return -EILSEQ; + } + + return 0; +} + +static int +mcp251xfd_rx_ring_update(const struct mcp251xfd_priv *priv, + struct mcp251xfd_rx_ring *ring) +{ + u32 new_head; + u8 chip_rx_head; + int err; + + err = mcp251xfd_rx_head_get_from_chip(priv, ring, &chip_rx_head); + if (err) + return err; + + /* chip_rx_head, is the next RX-Object filled by the HW. + * The new RX head must be >= the old head. + */ + new_head = round_down(ring->head, ring->obj_num) + chip_rx_head; + if (new_head <= ring->head) + new_head += ring->obj_num; + + ring->head = new_head; + + return mcp251xfd_check_rx_tail(priv, ring); +} + +static void +mcp251xfd_hw_rx_obj_to_skb(const struct mcp251xfd_priv *priv, + const struct mcp251xfd_hw_rx_obj_canfd *hw_rx_obj, + struct sk_buff *skb) +{ + struct canfd_frame *cfd = (struct canfd_frame *)skb->data; + u8 dlc; + + if (hw_rx_obj->flags & MCP251XFD_OBJ_FLAGS_IDE) { + u32 sid, eid; + + eid = FIELD_GET(MCP251XFD_OBJ_ID_EID_MASK, hw_rx_obj->id); + sid = FIELD_GET(MCP251XFD_OBJ_ID_SID_MASK, hw_rx_obj->id); + + cfd->can_id = CAN_EFF_FLAG | + FIELD_PREP(MCP251XFD_REG_FRAME_EFF_EID_MASK, eid) | + FIELD_PREP(MCP251XFD_REG_FRAME_EFF_SID_MASK, sid); + } else { + cfd->can_id = FIELD_GET(MCP251XFD_OBJ_ID_SID_MASK, + hw_rx_obj->id); + } + + dlc = FIELD_GET(MCP251XFD_OBJ_FLAGS_DLC_MASK, hw_rx_obj->flags); + + /* CANFD */ + if (hw_rx_obj->flags & MCP251XFD_OBJ_FLAGS_FDF) { + if (hw_rx_obj->flags & MCP251XFD_OBJ_FLAGS_ESI) + cfd->flags |= CANFD_ESI; + + if (hw_rx_obj->flags & MCP251XFD_OBJ_FLAGS_BRS) + cfd->flags |= CANFD_BRS; + + cfd->len = can_fd_dlc2len(dlc); + } else { + if (hw_rx_obj->flags & MCP251XFD_OBJ_FLAGS_RTR) + cfd->can_id |= CAN_RTR_FLAG; + + can_frame_set_cc_len((struct can_frame *)cfd, dlc, + priv->can.ctrlmode); + } + + if (!(hw_rx_obj->flags & MCP251XFD_OBJ_FLAGS_RTR)) + memcpy(cfd->data, hw_rx_obj->data, cfd->len); + + mcp251xfd_skb_set_timestamp(priv, skb, hw_rx_obj->ts); +} + +static int +mcp251xfd_handle_rxif_one(struct mcp251xfd_priv *priv, + struct mcp251xfd_rx_ring *ring, + const struct mcp251xfd_hw_rx_obj_canfd *hw_rx_obj) +{ + struct net_device_stats *stats = &priv->ndev->stats; + struct sk_buff *skb; + struct canfd_frame *cfd; + int err; + + if (hw_rx_obj->flags & MCP251XFD_OBJ_FLAGS_FDF) + skb = alloc_canfd_skb(priv->ndev, &cfd); + else + skb = alloc_can_skb(priv->ndev, (struct can_frame **)&cfd); + + if (!skb) { + stats->rx_dropped++; + return 0; + } + + mcp251xfd_hw_rx_obj_to_skb(priv, hw_rx_obj, skb); + err = can_rx_offload_queue_sorted(&priv->offload, skb, hw_rx_obj->ts); + if (err) + stats->rx_fifo_errors++; + + return 0; +} + +static inline int +mcp251xfd_rx_obj_read(const struct mcp251xfd_priv *priv, + const struct mcp251xfd_rx_ring *ring, + struct mcp251xfd_hw_rx_obj_canfd *hw_rx_obj, + const u8 offset, const u8 len) +{ + const int val_bytes = regmap_get_val_bytes(priv->map_rx); + int err; + + err = regmap_bulk_read(priv->map_rx, + mcp251xfd_get_rx_obj_addr(ring, offset), + hw_rx_obj, + len * ring->obj_size / val_bytes); + + return err; +} + +static int +mcp251xfd_handle_rxif_ring(struct mcp251xfd_priv *priv, + struct mcp251xfd_rx_ring *ring) +{ + struct mcp251xfd_hw_rx_obj_canfd *hw_rx_obj = ring->obj; + u8 rx_tail, len; + int err, i; + + err = mcp251xfd_rx_ring_update(priv, ring); + if (err) + return err; + + while ((len = mcp251xfd_get_rx_linear_len(ring))) { + int offset; + + rx_tail = mcp251xfd_get_rx_tail(ring); + + err = mcp251xfd_rx_obj_read(priv, ring, hw_rx_obj, + rx_tail, len); + if (err) + return err; + + for (i = 0; i < len; i++) { + err = mcp251xfd_handle_rxif_one(priv, ring, + (void *)hw_rx_obj + + i * ring->obj_size); + if (err) + return err; + } + + /* Increment the RX FIFO tail pointer 'len' times in a + * single SPI message. + * + * Note: + * Calculate offset, so that the SPI transfer ends on + * the last message of the uinc_xfer array, which has + * "cs_change == 0", to properly deactivate the chip + * select. + */ + offset = ARRAY_SIZE(ring->uinc_xfer) - len; + err = spi_sync_transfer(priv->spi, + ring->uinc_xfer + offset, len); + if (err) + return err; + + ring->tail += len; + } + + return 0; +} + +int mcp251xfd_handle_rxif(struct mcp251xfd_priv *priv) +{ + struct mcp251xfd_rx_ring *ring; + int err, n; + + mcp251xfd_for_each_rx_ring(priv, ring, n) { + err = mcp251xfd_handle_rxif_ring(priv, ring); + if (err) + return err; + } + + return 0; +} diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-tef.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-tef.c new file mode 100644 index 000000000000..406166005b99 --- /dev/null +++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-tef.c @@ -0,0 +1,260 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// mcp251xfd - Microchip MCP251xFD Family CAN controller driver +// +// Copyright (c) 2019, 2020, 2021 Pengutronix, +// Marc Kleine-Budde <kernel@pengutronix.de> +// +// Based on: +// +// CAN bus driver for Microchip 25XXFD CAN Controller with SPI Interface +// +// Copyright (c) 2019 Martin Sperl <kernel@martin.sperl.org> +// + +#include <linux/bitfield.h> + +#include "mcp251xfd.h" + +static inline int +mcp251xfd_tef_tail_get_from_chip(const struct mcp251xfd_priv *priv, + u8 *tef_tail) +{ + u32 tef_ua; + int err; + + err = regmap_read(priv->map_reg, MCP251XFD_REG_TEFUA, &tef_ua); + if (err) + return err; + + *tef_tail = tef_ua / sizeof(struct mcp251xfd_hw_tef_obj); + + return 0; +} + +static int mcp251xfd_check_tef_tail(const struct mcp251xfd_priv *priv) +{ + u8 tef_tail_chip, tef_tail; + int err; + + if (!IS_ENABLED(CONFIG_CAN_MCP251XFD_SANITY)) + return 0; + + err = mcp251xfd_tef_tail_get_from_chip(priv, &tef_tail_chip); + if (err) + return err; + + tef_tail = mcp251xfd_get_tef_tail(priv); + if (tef_tail_chip != tef_tail) { + netdev_err(priv->ndev, + "TEF tail of chip (0x%02x) and ours (0x%08x) inconsistent.\n", + tef_tail_chip, tef_tail); + return -EILSEQ; + } + + return 0; +} + +static int +mcp251xfd_handle_tefif_recover(const struct mcp251xfd_priv *priv, const u32 seq) +{ + const struct mcp251xfd_tx_ring *tx_ring = priv->tx; + u32 tef_sta; + int err; + + err = regmap_read(priv->map_reg, MCP251XFD_REG_TEFSTA, &tef_sta); + if (err) + return err; + + if (tef_sta & MCP251XFD_REG_TEFSTA_TEFOVIF) { + netdev_err(priv->ndev, + "Transmit Event FIFO buffer overflow.\n"); + return -ENOBUFS; + } + + netdev_info(priv->ndev, + "Transmit Event FIFO buffer %s. (seq=0x%08x, tef_tail=0x%08x, tef_head=0x%08x, tx_head=0x%08x).\n", + tef_sta & MCP251XFD_REG_TEFSTA_TEFFIF ? + "full" : tef_sta & MCP251XFD_REG_TEFSTA_TEFNEIF ? + "not empty" : "empty", + seq, priv->tef->tail, priv->tef->head, tx_ring->head); + + /* The Sequence Number in the TEF doesn't match our tef_tail. */ + return -EAGAIN; +} + +static int +mcp251xfd_handle_tefif_one(struct mcp251xfd_priv *priv, + const struct mcp251xfd_hw_tef_obj *hw_tef_obj, + unsigned int *frame_len_ptr) +{ + struct net_device_stats *stats = &priv->ndev->stats; + struct sk_buff *skb; + u32 seq, seq_masked, tef_tail_masked, tef_tail; + + seq = FIELD_GET(MCP251XFD_OBJ_FLAGS_SEQ_MCP2518FD_MASK, + hw_tef_obj->flags); + + /* Use the MCP2517FD mask on the MCP2518FD, too. We only + * compare 7 bits, this should be enough to detect + * net-yet-completed, i.e. old TEF objects. + */ + seq_masked = seq & + field_mask(MCP251XFD_OBJ_FLAGS_SEQ_MCP2517FD_MASK); + tef_tail_masked = priv->tef->tail & + field_mask(MCP251XFD_OBJ_FLAGS_SEQ_MCP2517FD_MASK); + if (seq_masked != tef_tail_masked) + return mcp251xfd_handle_tefif_recover(priv, seq); + + tef_tail = mcp251xfd_get_tef_tail(priv); + skb = priv->can.echo_skb[tef_tail]; + if (skb) + mcp251xfd_skb_set_timestamp(priv, skb, hw_tef_obj->ts); + stats->tx_bytes += + can_rx_offload_get_echo_skb(&priv->offload, + tef_tail, hw_tef_obj->ts, + frame_len_ptr); + stats->tx_packets++; + priv->tef->tail++; + + return 0; +} + +static int mcp251xfd_tef_ring_update(struct mcp251xfd_priv *priv) +{ + const struct mcp251xfd_tx_ring *tx_ring = priv->tx; + unsigned int new_head; + u8 chip_tx_tail; + int err; + + err = mcp251xfd_tx_tail_get_from_chip(priv, &chip_tx_tail); + if (err) + return err; + + /* chip_tx_tail, is the next TX-Object send by the HW. + * The new TEF head must be >= the old head, ... + */ + new_head = round_down(priv->tef->head, tx_ring->obj_num) + chip_tx_tail; + if (new_head <= priv->tef->head) + new_head += tx_ring->obj_num; + + /* ... but it cannot exceed the TX head. */ + priv->tef->head = min(new_head, tx_ring->head); + + return mcp251xfd_check_tef_tail(priv); +} + +static inline int +mcp251xfd_tef_obj_read(const struct mcp251xfd_priv *priv, + struct mcp251xfd_hw_tef_obj *hw_tef_obj, + const u8 offset, const u8 len) +{ + const struct mcp251xfd_tx_ring *tx_ring = priv->tx; + const int val_bytes = regmap_get_val_bytes(priv->map_rx); + + if (IS_ENABLED(CONFIG_CAN_MCP251XFD_SANITY) && + (offset > tx_ring->obj_num || + len > tx_ring->obj_num || + offset + len > tx_ring->obj_num)) { + netdev_err(priv->ndev, + "Trying to read too many TEF objects (max=%d, offset=%d, len=%d).\n", + tx_ring->obj_num, offset, len); + return -ERANGE; + } + + return regmap_bulk_read(priv->map_rx, + mcp251xfd_get_tef_obj_addr(offset), + hw_tef_obj, + sizeof(*hw_tef_obj) / val_bytes * len); +} + +static inline void mcp251xfd_ecc_tefif_successful(struct mcp251xfd_priv *priv) +{ + struct mcp251xfd_ecc *ecc = &priv->ecc; + + ecc->ecc_stat = 0; +} + +int mcp251xfd_handle_tefif(struct mcp251xfd_priv *priv) +{ + struct mcp251xfd_hw_tef_obj hw_tef_obj[MCP251XFD_TX_OBJ_NUM_MAX]; + unsigned int total_frame_len = 0; + u8 tef_tail, len, l; + int err, i; + + err = mcp251xfd_tef_ring_update(priv); + if (err) + return err; + + tef_tail = mcp251xfd_get_tef_tail(priv); + len = mcp251xfd_get_tef_len(priv); + l = mcp251xfd_get_tef_linear_len(priv); + err = mcp251xfd_tef_obj_read(priv, hw_tef_obj, tef_tail, l); + if (err) + return err; + + if (l < len) { + err = mcp251xfd_tef_obj_read(priv, &hw_tef_obj[l], 0, len - l); + if (err) + return err; + } + + for (i = 0; i < len; i++) { + unsigned int frame_len = 0; + + err = mcp251xfd_handle_tefif_one(priv, &hw_tef_obj[i], &frame_len); + /* -EAGAIN means the Sequence Number in the TEF + * doesn't match our tef_tail. This can happen if we + * read the TEF objects too early. Leave loop let the + * interrupt handler call us again. + */ + if (err == -EAGAIN) + goto out_netif_wake_queue; + if (err) + return err; + + total_frame_len += frame_len; + } + + out_netif_wake_queue: + len = i; /* number of handled goods TEFs */ + if (len) { + struct mcp251xfd_tef_ring *ring = priv->tef; + struct mcp251xfd_tx_ring *tx_ring = priv->tx; + int offset; + + /* Increment the TEF FIFO tail pointer 'len' times in + * a single SPI message. + * + * Note: + * Calculate offset, so that the SPI transfer ends on + * the last message of the uinc_xfer array, which has + * "cs_change == 0", to properly deactivate the chip + * select. + */ + offset = ARRAY_SIZE(ring->uinc_xfer) - len; + err = spi_sync_transfer(priv->spi, + ring->uinc_xfer + offset, len); + if (err) + return err; + + tx_ring->tail += len; + netdev_completed_queue(priv->ndev, len, total_frame_len); + + err = mcp251xfd_check_tef_tail(priv); + if (err) + return err; + } + + mcp251xfd_ecc_tefif_successful(priv); + + if (mcp251xfd_get_tx_free(priv->tx)) { + /* Make sure that anybody stopping the queue after + * this sees the new tx_ring->tail. + */ + smp_mb(); + netif_wake_queue(priv->ndev); + } + + return 0; +} diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-tx.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-tx.c new file mode 100644 index 000000000000..ffb6c36b7d9b --- /dev/null +++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-tx.c @@ -0,0 +1,205 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// mcp251xfd - Microchip MCP251xFD Family CAN controller driver +// +// Copyright (c) 2019, 2020, 2021 Pengutronix, +// Marc Kleine-Budde <kernel@pengutronix.de> +// +// Based on: +// +// CAN bus driver for Microchip 25XXFD CAN Controller with SPI Interface +// +// Copyright (c) 2019 Martin Sperl <kernel@martin.sperl.org> +// + +#include <asm/unaligned.h> +#include <linux/bitfield.h> + +#include "mcp251xfd.h" + +static inline struct +mcp251xfd_tx_obj *mcp251xfd_get_tx_obj_next(struct mcp251xfd_tx_ring *tx_ring) +{ + u8 tx_head; + + tx_head = mcp251xfd_get_tx_head(tx_ring); + + return &tx_ring->obj[tx_head]; +} + +static void +mcp251xfd_tx_obj_from_skb(const struct mcp251xfd_priv *priv, + struct mcp251xfd_tx_obj *tx_obj, + const struct sk_buff *skb, + unsigned int seq) +{ + const struct canfd_frame *cfd = (struct canfd_frame *)skb->data; + struct mcp251xfd_hw_tx_obj_raw *hw_tx_obj; + union mcp251xfd_tx_obj_load_buf *load_buf; + u8 dlc; + u32 id, flags; + int len_sanitized = 0, len; + + if (cfd->can_id & CAN_EFF_FLAG) { + u32 sid, eid; + + sid = FIELD_GET(MCP251XFD_REG_FRAME_EFF_SID_MASK, cfd->can_id); + eid = FIELD_GET(MCP251XFD_REG_FRAME_EFF_EID_MASK, cfd->can_id); + + id = FIELD_PREP(MCP251XFD_OBJ_ID_EID_MASK, eid) | + FIELD_PREP(MCP251XFD_OBJ_ID_SID_MASK, sid); + + flags = MCP251XFD_OBJ_FLAGS_IDE; + } else { + id = FIELD_PREP(MCP251XFD_OBJ_ID_SID_MASK, cfd->can_id); + flags = 0; + } + + /* Use the MCP2518FD mask even on the MCP2517FD. It doesn't + * harm, only the lower 7 bits will be transferred into the + * TEF object. + */ + flags |= FIELD_PREP(MCP251XFD_OBJ_FLAGS_SEQ_MCP2518FD_MASK, seq); + + if (cfd->can_id & CAN_RTR_FLAG) + flags |= MCP251XFD_OBJ_FLAGS_RTR; + else + len_sanitized = canfd_sanitize_len(cfd->len); + + /* CANFD */ + if (can_is_canfd_skb(skb)) { + if (cfd->flags & CANFD_ESI) + flags |= MCP251XFD_OBJ_FLAGS_ESI; + + flags |= MCP251XFD_OBJ_FLAGS_FDF; + + if (cfd->flags & CANFD_BRS) + flags |= MCP251XFD_OBJ_FLAGS_BRS; + + dlc = can_fd_len2dlc(cfd->len); + } else { + dlc = can_get_cc_dlc((struct can_frame *)cfd, + priv->can.ctrlmode); + } + + flags |= FIELD_PREP(MCP251XFD_OBJ_FLAGS_DLC_MASK, dlc); + + load_buf = &tx_obj->buf; + if (priv->devtype_data.quirks & MCP251XFD_QUIRK_CRC_TX) + hw_tx_obj = &load_buf->crc.hw_tx_obj; + else + hw_tx_obj = &load_buf->nocrc.hw_tx_obj; + + put_unaligned_le32(id, &hw_tx_obj->id); + put_unaligned_le32(flags, &hw_tx_obj->flags); + + /* Copy data */ + memcpy(hw_tx_obj->data, cfd->data, cfd->len); + + /* Clear unused data at end of CAN frame */ + if (MCP251XFD_SANITIZE_CAN && len_sanitized) { + int pad_len; + + pad_len = len_sanitized - cfd->len; + if (pad_len) + memset(hw_tx_obj->data + cfd->len, 0x0, pad_len); + } + + /* Number of bytes to be written into the RAM of the controller */ + len = sizeof(hw_tx_obj->id) + sizeof(hw_tx_obj->flags); + if (MCP251XFD_SANITIZE_CAN) + len += round_up(len_sanitized, sizeof(u32)); + else + len += round_up(cfd->len, sizeof(u32)); + + if (priv->devtype_data.quirks & MCP251XFD_QUIRK_CRC_TX) { + u16 crc; + + mcp251xfd_spi_cmd_crc_set_len_in_ram(&load_buf->crc.cmd, + len); + /* CRC */ + len += sizeof(load_buf->crc.cmd); + crc = mcp251xfd_crc16_compute(&load_buf->crc, len); + put_unaligned_be16(crc, (void *)load_buf + len); + + /* Total length */ + len += sizeof(load_buf->crc.crc); + } else { + len += sizeof(load_buf->nocrc.cmd); + } + + tx_obj->xfer[0].len = len; +} + +static int mcp251xfd_tx_obj_write(const struct mcp251xfd_priv *priv, + struct mcp251xfd_tx_obj *tx_obj) +{ + return spi_async(priv->spi, &tx_obj->msg); +} + +static bool mcp251xfd_tx_busy(const struct mcp251xfd_priv *priv, + struct mcp251xfd_tx_ring *tx_ring) +{ + if (mcp251xfd_get_tx_free(tx_ring) > 0) + return false; + + netif_stop_queue(priv->ndev); + + /* Memory barrier before checking tx_free (head and tail) */ + smp_mb(); + + if (mcp251xfd_get_tx_free(tx_ring) == 0) { + netdev_dbg(priv->ndev, + "Stopping tx-queue (tx_head=0x%08x, tx_tail=0x%08x, len=%d).\n", + tx_ring->head, tx_ring->tail, + tx_ring->head - tx_ring->tail); + + return true; + } + + netif_start_queue(priv->ndev); + + return false; +} + +netdev_tx_t mcp251xfd_start_xmit(struct sk_buff *skb, + struct net_device *ndev) +{ + struct mcp251xfd_priv *priv = netdev_priv(ndev); + struct mcp251xfd_tx_ring *tx_ring = priv->tx; + struct mcp251xfd_tx_obj *tx_obj; + unsigned int frame_len; + u8 tx_head; + int err; + + if (can_dropped_invalid_skb(ndev, skb)) + return NETDEV_TX_OK; + + if (mcp251xfd_tx_busy(priv, tx_ring)) + return NETDEV_TX_BUSY; + + tx_obj = mcp251xfd_get_tx_obj_next(tx_ring); + mcp251xfd_tx_obj_from_skb(priv, tx_obj, skb, tx_ring->head); + + /* Stop queue if we occupy the complete TX FIFO */ + tx_head = mcp251xfd_get_tx_head(tx_ring); + tx_ring->head++; + if (mcp251xfd_get_tx_free(tx_ring) == 0) + netif_stop_queue(ndev); + + frame_len = can_skb_get_frame_len(skb); + err = can_put_echo_skb(skb, ndev, tx_head, frame_len); + if (!err) + netdev_sent_queue(priv->ndev, frame_len); + + err = mcp251xfd_tx_obj_write(priv, tx_obj); + if (err) + goto out_err; + + return NETDEV_TX_OK; + + out_err: + netdev_err(priv->ndev, "ERROR in %s: %d\n", __func__, err); + + return NETDEV_TX_OK; +} diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd.h b/drivers/net/can/spi/mcp251xfd/mcp251xfd.h index 0f322dabaf65..f551c900803e 100644 --- a/drivers/net/can/spi/mcp251xfd/mcp251xfd.h +++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd.h @@ -10,6 +10,7 @@ #ifndef _MCP251XFD_H #define _MCP251XFD_H +#include <linux/bitfield.h> #include <linux/can/core.h> #include <linux/can/dev.h> #include <linux/can/rx-offload.h> @@ -625,6 +626,12 @@ MCP251XFD_IS(2517); MCP251XFD_IS(2518); MCP251XFD_IS(251X); +static inline bool mcp251xfd_is_fd_mode(const struct mcp251xfd_priv *priv) +{ + /* listen-only mode works like FD mode */ + return priv->can.ctrlmode & (CAN_CTRLMODE_LISTENONLY | CAN_CTRLMODE_FD); +} + static inline u8 mcp251xfd_first_byte_set(u32 mask) { return (mask & 0x0000ffff) ? @@ -761,6 +768,24 @@ mcp251xfd_get_rx_obj_addr(const struct mcp251xfd_rx_ring *ring, u8 n) return ring->base + ring->obj_size * n; } +static inline int +mcp251xfd_tx_tail_get_from_chip(const struct mcp251xfd_priv *priv, + u8 *tx_tail) +{ + u32 fifo_sta; + int err; + + err = regmap_read(priv->map_reg, + MCP251XFD_REG_FIFOSTA(MCP251XFD_TX_FIFO), + &fifo_sta); + if (err) + return err; + + *tx_tail = FIELD_GET(MCP251XFD_REG_FIFOSTA_FIFOCI_MASK, fifo_sta); + + return 0; +} + static inline u8 mcp251xfd_get_tef_head(const struct mcp251xfd_priv *priv) { return priv->tef->head & (priv->tx->obj_num - 1); @@ -849,15 +874,24 @@ mcp251xfd_get_rx_linear_len(const struct mcp251xfd_rx_ring *ring) (n) < (priv)->rx_ring_num; \ (n)++, (ring) = *((priv)->rx + (n))) -int mcp251xfd_regmap_init(struct mcp251xfd_priv *priv); +int mcp251xfd_chip_fifo_init(const struct mcp251xfd_priv *priv); u16 mcp251xfd_crc16_compute2(const void *cmd, size_t cmd_size, const void *data, size_t data_size); u16 mcp251xfd_crc16_compute(const void *data, size_t data_size); +int mcp251xfd_regmap_init(struct mcp251xfd_priv *priv); +void mcp251xfd_ring_init(struct mcp251xfd_priv *priv); +void mcp251xfd_ring_free(struct mcp251xfd_priv *priv); +int mcp251xfd_ring_alloc(struct mcp251xfd_priv *priv); +int mcp251xfd_handle_rxif(struct mcp251xfd_priv *priv); +int mcp251xfd_handle_tefif(struct mcp251xfd_priv *priv); void mcp251xfd_skb_set_timestamp(const struct mcp251xfd_priv *priv, struct sk_buff *skb, u32 timestamp); void mcp251xfd_timestamp_init(struct mcp251xfd_priv *priv); void mcp251xfd_timestamp_stop(struct mcp251xfd_priv *priv); +netdev_tx_t mcp251xfd_start_xmit(struct sk_buff *skb, + struct net_device *ndev); + #if IS_ENABLED(CONFIG_DEV_COREDUMP) void mcp251xfd_dump(const struct mcp251xfd_priv *priv); #else diff --git a/drivers/net/can/sun4i_can.c b/drivers/net/can/sun4i_can.c index 54aa7c25c4de..25d6d81ab4f4 100644 --- a/drivers/net/can/sun4i_can.c +++ b/drivers/net/can/sun4i_can.c @@ -61,6 +61,7 @@ #include <linux/of.h> #include <linux/of_device.h> #include <linux/platform_device.h> +#include <linux/reset.h> #define DRV_NAME "sun4i_can" @@ -200,10 +201,20 @@ #define SUN4I_CAN_MAX_IRQ 20 #define SUN4I_MODE_MAX_RETRIES 100 +/** + * struct sun4ican_quirks - Differences between SoC variants. + * + * @has_reset: SoC needs reset deasserted. + */ +struct sun4ican_quirks { + bool has_reset; +}; + struct sun4ican_priv { struct can_priv can; void __iomem *base; struct clk *clk; + struct reset_control *reset; spinlock_t cmdreg_lock; /* lock for concurrent cmd register writes */ }; @@ -490,18 +501,20 @@ static void sun4i_can_rx(struct net_device *dev) } /* remote frame ? */ - if (fi & SUN4I_MSG_RTR_FLAG) + if (fi & SUN4I_MSG_RTR_FLAG) { id |= CAN_RTR_FLAG; - else + } else { for (i = 0; i < cf->len; i++) cf->data[i] = readl(priv->base + dreg + i * 4); + stats->rx_bytes += cf->len; + } + stats->rx_packets++; + cf->can_id = id; sun4i_can_write_cmdreg(priv, SUN4I_CMD_RELEASE_RBUF); - stats->rx_packets++; - stats->rx_bytes += cf->len; netif_rx(skb); can_led_event(dev, CAN_LED_EVENT_RX); @@ -622,13 +635,10 @@ static int sun4i_can_err(struct net_device *dev, u8 isrc, u8 status) can_bus_off(dev); } - if (likely(skb)) { - stats->rx_packets++; - stats->rx_bytes += cf->len; + if (likely(skb)) netif_rx(skb); - } else { + else return -ENOMEM; - } return 0; } @@ -651,11 +661,8 @@ static irqreturn_t sun4i_can_interrupt(int irq, void *dev_id) if (isrc & SUN4I_INT_TBUF_VLD) { /* transmission complete interrupt */ - stats->tx_bytes += - readl(priv->base + - SUN4I_REG_RBUF_RBACK_START_ADDR) & 0xf; + stats->tx_bytes += can_get_echo_skb(dev, 0, NULL); stats->tx_packets++; - can_get_echo_skb(dev, 0, NULL); netif_wake_queue(dev); can_led_event(dev, CAN_LED_EVENT_TX); } @@ -702,6 +709,13 @@ static int sun4ican_open(struct net_device *dev) goto exit_irq; } + /* software reset deassert */ + err = reset_control_deassert(priv->reset); + if (err) { + netdev_err(dev, "could not deassert CAN reset\n"); + goto exit_soft_reset; + } + /* turn on clocking for CAN peripheral block */ err = clk_prepare_enable(priv->clk); if (err) { @@ -723,6 +737,8 @@ static int sun4ican_open(struct net_device *dev) exit_can_start: clk_disable_unprepare(priv->clk); exit_clock: + reset_control_assert(priv->reset); +exit_soft_reset: free_irq(dev->irq, dev); exit_irq: close_candev(dev); @@ -736,6 +752,7 @@ static int sun4ican_close(struct net_device *dev) netif_stop_queue(dev); sun4i_can_stop(dev); clk_disable_unprepare(priv->clk); + reset_control_assert(priv->reset); free_irq(dev->irq, dev); close_candev(dev); @@ -750,9 +767,27 @@ static const struct net_device_ops sun4ican_netdev_ops = { .ndo_start_xmit = sun4ican_start_xmit, }; +static const struct sun4ican_quirks sun4ican_quirks_a10 = { + .has_reset = false, +}; + +static const struct sun4ican_quirks sun4ican_quirks_r40 = { + .has_reset = true, +}; + static const struct of_device_id sun4ican_of_match[] = { - {.compatible = "allwinner,sun4i-a10-can"}, - {}, + { + .compatible = "allwinner,sun4i-a10-can", + .data = &sun4ican_quirks_a10 + }, { + .compatible = "allwinner,sun7i-a20-can", + .data = &sun4ican_quirks_a10 + }, { + .compatible = "allwinner,sun8i-r40-can", + .data = &sun4ican_quirks_r40 + }, { + /* sentinel */ + }, }; MODULE_DEVICE_TABLE(of, sun4ican_of_match); @@ -771,10 +806,28 @@ static int sun4ican_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; struct clk *clk; + struct reset_control *reset = NULL; void __iomem *addr; int err, irq; struct net_device *dev; struct sun4ican_priv *priv; + const struct sun4ican_quirks *quirks; + + quirks = of_device_get_match_data(&pdev->dev); + if (!quirks) { + dev_err(&pdev->dev, "failed to determine the quirks to use\n"); + err = -ENODEV; + goto exit; + } + + if (quirks->has_reset) { + reset = devm_reset_control_get_exclusive(&pdev->dev, NULL); + if (IS_ERR(reset)) { + dev_err(&pdev->dev, "unable to request reset\n"); + err = PTR_ERR(reset); + goto exit; + } + } clk = of_clk_get(np, 0); if (IS_ERR(clk)) { @@ -818,6 +871,7 @@ static int sun4ican_probe(struct platform_device *pdev) CAN_CTRLMODE_3_SAMPLES; priv->base = addr; priv->clk = clk; + priv->reset = reset; spin_lock_init(&priv->cmdreg_lock); platform_set_drvdata(pdev, dev); diff --git a/drivers/net/can/ti_hecc.c b/drivers/net/can/ti_hecc.c index 353062ead98f..ff31b993ab17 100644 --- a/drivers/net/can/ti_hecc.c +++ b/drivers/net/can/ti_hecc.c @@ -859,7 +859,6 @@ static int ti_hecc_probe(struct platform_device *pdev) struct net_device *ndev = (struct net_device *)0; struct ti_hecc_priv *priv; struct device_node *np = pdev->dev.of_node; - struct resource *irq; struct regulator *reg_xceiver; int err = -ENODEV; @@ -904,9 +903,9 @@ static int ti_hecc_probe(struct platform_device *pdev) goto probe_exit_candev; } - irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (!irq) { - dev_err(&pdev->dev, "No irq resource\n"); + ndev->irq = platform_get_irq(pdev, 0); + if (ndev->irq < 0) { + err = ndev->irq; goto probe_exit_candev; } @@ -920,7 +919,6 @@ static int ti_hecc_probe(struct platform_device *pdev) priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES; spin_lock_init(&priv->mbx_lock); - ndev->irq = irq->start; ndev->flags |= IFF_ECHO; platform_set_drvdata(pdev, ndev); SET_NETDEV_DEV(ndev, &pdev->dev); diff --git a/drivers/net/can/usb/ems_usb.c b/drivers/net/can/usb/ems_usb.c index 2b5302e72435..7bedceffdfa3 100644 --- a/drivers/net/can/usb/ems_usb.c +++ b/drivers/net/can/usb/ems_usb.c @@ -230,7 +230,6 @@ struct ems_tx_urb_context { struct ems_usb *dev; u32 echo_index; - u8 dlc; }; struct ems_usb { @@ -320,10 +319,11 @@ static void ems_usb_rx_can_msg(struct ems_usb *dev, struct ems_cpc_msg *msg) } else { for (i = 0; i < cf->len; i++) cf->data[i] = msg->msg.can_msg.msg[i]; - } + stats->rx_bytes += cf->len; + } stats->rx_packets++; - stats->rx_bytes += cf->len; + netif_rx(skb); } @@ -397,8 +397,6 @@ static void ems_usb_rx_err(struct ems_usb *dev, struct ems_cpc_msg *msg) stats->rx_errors++; } - stats->rx_packets++; - stats->rx_bytes += cf->len; netif_rx(skb); } @@ -518,9 +516,8 @@ static void ems_usb_write_bulk_callback(struct urb *urb) /* transmission complete interrupt */ netdev->stats.tx_packets++; - netdev->stats.tx_bytes += context->dlc; - - can_get_echo_skb(netdev, context->echo_index, NULL); + netdev->stats.tx_bytes += can_get_echo_skb(netdev, context->echo_index, + NULL); /* Release context */ context->echo_index = MAX_TX_URBS; @@ -806,7 +803,6 @@ static netdev_tx_t ems_usb_start_xmit(struct sk_buff *skb, struct net_device *ne context->dev = dev; context->echo_index = i; - context->dlc = cf->len; usb_fill_bulk_urb(urb, dev->udev, usb_sndbulkpipe(dev->udev, 2), buf, size, ems_usb_write_bulk_callback, context); diff --git a/drivers/net/can/usb/esd_usb2.c b/drivers/net/can/usb/esd_usb2.c index c6068a251fbe..286daaaea0b8 100644 --- a/drivers/net/can/usb/esd_usb2.c +++ b/drivers/net/can/usb/esd_usb2.c @@ -183,7 +183,6 @@ struct esd_usb2_net_priv; struct esd_tx_urb_context { struct esd_usb2_net_priv *priv; u32 echo_index; - int len; /* CAN payload length */ }; struct esd_usb2 { @@ -293,8 +292,6 @@ static void esd_usb2_rx_event(struct esd_usb2_net_priv *priv, priv->bec.txerr = txerr; priv->bec.rxerr = rxerr; - stats->rx_packets++; - stats->rx_bytes += cf->len; netif_rx(skb); } } @@ -334,10 +331,11 @@ static void esd_usb2_rx_can_msg(struct esd_usb2_net_priv *priv, } else { for (i = 0; i < cf->len; i++) cf->data[i] = msg->msg.rx.data[i]; - } + stats->rx_bytes += cf->len; + } stats->rx_packets++; - stats->rx_bytes += cf->len; + netif_rx(skb); } @@ -358,8 +356,8 @@ static void esd_usb2_tx_done_msg(struct esd_usb2_net_priv *priv, if (!msg->msg.txdone.status) { stats->tx_packets++; - stats->tx_bytes += context->len; - can_get_echo_skb(netdev, context->echo_index, NULL); + stats->tx_bytes += can_get_echo_skb(netdev, context->echo_index, + NULL); } else { stats->tx_errors++; can_free_echo_skb(netdev, context->echo_index, NULL); @@ -784,7 +782,6 @@ static netdev_tx_t esd_usb2_start_xmit(struct sk_buff *skb, context->priv = priv; context->echo_index = i; - context->len = cf->len; /* hnd must not be 0 - MSB is stripped in txdone handling */ msg->msg.tx.hnd = 0x80000000 | i; /* returned in TX done message */ diff --git a/drivers/net/can/usb/etas_es58x/es581_4.c b/drivers/net/can/usb/etas_es58x/es581_4.c index 14e360c9f2c9..1bcdcece5ec7 100644 --- a/drivers/net/can/usb/etas_es58x/es581_4.c +++ b/drivers/net/can/usb/etas_es58x/es581_4.c @@ -10,6 +10,7 @@ */ #include <linux/kernel.h> +#include <linux/units.h> #include <asm/unaligned.h> #include "es58x_core.h" @@ -469,8 +470,8 @@ const struct es58x_parameters es581_4_param = { .bittiming_const = &es581_4_bittiming_const, .data_bittiming_const = NULL, .tdc_const = NULL, - .bitrate_max = 1 * CAN_MBPS, - .clock = {.freq = 50 * CAN_MHZ}, + .bitrate_max = 1 * MEGA /* BPS */, + .clock = {.freq = 50 * MEGA /* Hz */}, .ctrlmode_supported = CAN_CTRLMODE_CC_LEN8_DLC, .tx_start_of_frame = 0xAFAF, .rx_start_of_frame = 0xFAFA, diff --git a/drivers/net/can/usb/etas_es58x/es58x_core.c b/drivers/net/can/usb/etas_es58x/es58x_core.c index 24627ab14626..2ed2370a3166 100644 --- a/drivers/net/can/usb/etas_es58x/es58x_core.c +++ b/drivers/net/can/usb/etas_es58x/es58x_core.c @@ -849,13 +849,6 @@ int es58x_rx_err_msg(struct net_device *netdev, enum es58x_err error, break; } - /* driver/net/can/dev.c:can_restart() takes in account error - * messages in the RX stats. Doing the same here for - * consistency. - */ - netdev->stats.rx_packets++; - netdev->stats.rx_bytes += CAN_ERR_DLC; - if (cf) { if (cf->data[1]) cf->can_id |= CAN_ERR_CRTL; @@ -2094,6 +2087,7 @@ static int es58x_init_netdev(struct es58x_device *es58x_dev, int channel_idx) netdev->netdev_ops = &es58x_netdev_ops; netdev->flags |= IFF_ECHO; /* We support local echo */ + netdev->dev_port = channel_idx; ret = register_candev(netdev); if (ret) diff --git a/drivers/net/can/usb/etas_es58x/es58x_fd.c b/drivers/net/can/usb/etas_es58x/es58x_fd.c index 4f0cae29f4d8..ec87126e1a7d 100644 --- a/drivers/net/can/usb/etas_es58x/es58x_fd.c +++ b/drivers/net/can/usb/etas_es58x/es58x_fd.c @@ -12,6 +12,7 @@ */ #include <linux/kernel.h> +#include <linux/units.h> #include <asm/unaligned.h> #include "es58x_core.h" @@ -522,8 +523,8 @@ const struct es58x_parameters es58x_fd_param = { * Mbps work in an optimal environment but are not recommended * for production environment. */ - .bitrate_max = 8 * CAN_MBPS, - .clock = {.freq = 80 * CAN_MHZ}, + .bitrate_max = 8 * MEGA /* BPS */, + .clock = {.freq = 80 * MEGA /* Hz */}, .ctrlmode_supported = CAN_CTRLMODE_LOOPBACK | CAN_CTRLMODE_LISTENONLY | CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_FD | CAN_CTRLMODE_FD_NON_ISO | CAN_CTRLMODE_CC_LEN8_DLC | CAN_CTRLMODE_TDC_AUTO, diff --git a/drivers/net/can/usb/gs_usb.c b/drivers/net/can/usb/gs_usb.c index 1b400de00f51..b487e3fe770a 100644 --- a/drivers/net/can/usb/gs_usb.c +++ b/drivers/net/can/usb/gs_usb.c @@ -321,7 +321,7 @@ static void gs_usb_receive_bulk_callback(struct urb *urb) /* device reports out of range channel id */ if (hf->channel >= GS_MAX_INTF) - goto resubmit_urb; + goto device_detach; dev = usbcan->canch[hf->channel]; @@ -357,9 +357,6 @@ static void gs_usb_receive_bulk_callback(struct urb *urb) goto resubmit_urb; } - netdev->stats.tx_packets++; - netdev->stats.tx_bytes += hf->can_dlc; - txc = gs_get_tx_context(dev, hf->echo_id); /* bad devices send bad echo_ids. */ @@ -370,7 +367,9 @@ static void gs_usb_receive_bulk_callback(struct urb *urb) goto resubmit_urb; } - can_get_echo_skb(netdev, hf->echo_id, NULL); + netdev->stats.tx_packets++; + netdev->stats.tx_bytes += can_get_echo_skb(netdev, hf->echo_id, + NULL); gs_free_tx_context(txc); @@ -406,6 +405,7 @@ static void gs_usb_receive_bulk_callback(struct urb *urb) /* USB failure take down all interfaces */ if (rc == -ENODEV) { + device_detach: for (rc = 0; rc < GS_MAX_INTF; rc++) { if (usbcan->canch[rc]) netif_device_detach(usbcan->canch[rc]->netdev); @@ -507,6 +507,8 @@ static netdev_tx_t gs_can_start_xmit(struct sk_buff *skb, hf->echo_id = idx; hf->channel = dev->channel; + hf->flags = 0; + hf->reserved = 0; cf = (struct can_frame *)skb->data; diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb.h b/drivers/net/can/usb/kvaser_usb/kvaser_usb.h index 390b6bde883c..3a49257f9fa6 100644 --- a/drivers/net/can/usb/kvaser_usb/kvaser_usb.h +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb.h @@ -77,7 +77,6 @@ struct kvaser_usb_dev_card_data { struct kvaser_usb_tx_urb_context { struct kvaser_usb_net_priv *priv; u32 echo_index; - int dlc; }; struct kvaser_usb { @@ -162,8 +161,8 @@ struct kvaser_usb_dev_ops { void (*dev_read_bulk_callback)(struct kvaser_usb *dev, void *buf, int len); void *(*dev_frame_to_cmd)(const struct kvaser_usb_net_priv *priv, - const struct sk_buff *skb, int *frame_len, - int *cmd_len, u16 transid); + const struct sk_buff *skb, int *cmd_len, + u16 transid); }; struct kvaser_usb_dev_cfg { diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c index 0cc0fc866a2a..c4b4d3d0a387 100644 --- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c @@ -279,8 +279,6 @@ int kvaser_usb_can_rx_over_error(struct net_device *netdev) cf->can_id |= CAN_ERR_CRTL; cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW; - stats->rx_packets++; - stats->rx_bytes += cf->len; netif_rx(skb); return 0; @@ -567,7 +565,7 @@ static netdev_tx_t kvaser_usb_start_xmit(struct sk_buff *skb, goto freeurb; } - buf = dev->ops->dev_frame_to_cmd(priv, skb, &context->dlc, &cmd_len, + buf = dev->ops->dev_frame_to_cmd(priv, skb, &cmd_len, context->echo_index); if (!buf) { stats->tx_dropped++; diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c index dcee8dc828ec..a26823c5b62a 100644 --- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c @@ -22,6 +22,7 @@ #include <linux/spinlock.h> #include <linux/string.h> #include <linux/types.h> +#include <linux/units.h> #include <linux/usb.h> #include <linux/can.h> @@ -295,6 +296,7 @@ struct kvaser_cmd { #define KVASER_USB_HYDRA_CF_FLAG_OVERRUN BIT(1) #define KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME BIT(4) #define KVASER_USB_HYDRA_CF_FLAG_EXTENDED_ID BIT(5) +#define KVASER_USB_HYDRA_CF_FLAG_TX_ACK BIT(6) /* CAN frame flags. Used in ext_rx_can and ext_tx_can */ #define KVASER_USB_HYDRA_CF_FLAG_OSM_NACK BIT(12) #define KVASER_USB_HYDRA_CF_FLAG_ABL BIT(13) @@ -869,7 +871,6 @@ static void kvaser_usb_hydra_update_state(struct kvaser_usb_net_priv *priv, struct net_device *netdev = priv->netdev; struct can_frame *cf; struct sk_buff *skb; - struct net_device_stats *stats; enum can_state new_state, old_state; old_state = priv->can.state; @@ -919,9 +920,6 @@ static void kvaser_usb_hydra_update_state(struct kvaser_usb_net_priv *priv, cf->data[6] = bec->txerr; cf->data[7] = bec->rxerr; - stats = &netdev->stats; - stats->rx_packets++; - stats->rx_bytes += cf->len; netif_rx(skb); } @@ -1074,8 +1072,6 @@ kvaser_usb_hydra_error_frame(struct kvaser_usb_net_priv *priv, cf->data[6] = bec.txerr; cf->data[7] = bec.rxerr; - stats->rx_packets++; - stats->rx_bytes += cf->len; netif_rx(skb); priv->bec.txerr = bec.txerr; @@ -1109,8 +1105,6 @@ static void kvaser_usb_hydra_one_shot_fail(struct kvaser_usb_net_priv *priv, } stats->tx_errors++; - stats->rx_packets++; - stats->rx_bytes += cf->len; netif_rx(skb); } @@ -1120,7 +1114,9 @@ static void kvaser_usb_hydra_tx_acknowledge(const struct kvaser_usb *dev, struct kvaser_usb_tx_urb_context *context; struct kvaser_usb_net_priv *priv; unsigned long irq_flags; + unsigned int len; bool one_shot_fail = false; + bool is_err_frame = false; u16 transid = kvaser_usb_hydra_get_cmd_transid(cmd); priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd); @@ -1139,24 +1135,28 @@ static void kvaser_usb_hydra_tx_acknowledge(const struct kvaser_usb *dev, kvaser_usb_hydra_one_shot_fail(priv, cmd_ext); one_shot_fail = true; } + + is_err_frame = flags & KVASER_USB_HYDRA_CF_FLAG_TX_ACK && + flags & KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME; } context = &priv->tx_contexts[transid % dev->max_tx_urbs]; - if (!one_shot_fail) { - struct net_device_stats *stats = &priv->netdev->stats; - - stats->tx_packets++; - stats->tx_bytes += can_fd_dlc2len(context->dlc); - } spin_lock_irqsave(&priv->tx_contexts_lock, irq_flags); - can_get_echo_skb(priv->netdev, context->echo_index, NULL); + len = can_get_echo_skb(priv->netdev, context->echo_index, NULL); context->echo_index = dev->max_tx_urbs; --priv->active_tx_contexts; netif_wake_queue(priv->netdev); spin_unlock_irqrestore(&priv->tx_contexts_lock, irq_flags); + + if (!one_shot_fail && !is_err_frame) { + struct net_device_stats *stats = &priv->netdev->stats; + + stats->tx_packets++; + stats->tx_bytes += len; + } } static void kvaser_usb_hydra_rx_msg_std(const struct kvaser_usb *dev, @@ -1208,13 +1208,15 @@ static void kvaser_usb_hydra_rx_msg_std(const struct kvaser_usb *dev, cf->len = can_cc_dlc2len(cmd->rx_can.dlc); - if (flags & KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME) + if (flags & KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME) { cf->can_id |= CAN_RTR_FLAG; - else + } else { memcpy(cf->data, cmd->rx_can.data, cf->len); + stats->rx_bytes += cf->len; + } stats->rx_packets++; - stats->rx_bytes += cf->len; + netif_rx(skb); } @@ -1286,13 +1288,15 @@ static void kvaser_usb_hydra_rx_msg_ext(const struct kvaser_usb *dev, cf->len = can_cc_dlc2len(dlc); } - if (flags & KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME) + if (flags & KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME) { cf->can_id |= CAN_RTR_FLAG; - else + } else { memcpy(cf->data, cmd->rx_can.kcan_payload, cf->len); + stats->rx_bytes += cf->len; + } stats->rx_packets++; - stats->rx_bytes += cf->len; + netif_rx(skb); } @@ -1371,8 +1375,8 @@ static void kvaser_usb_hydra_handle_cmd(const struct kvaser_usb *dev, static void * kvaser_usb_hydra_frame_to_cmd_ext(const struct kvaser_usb_net_priv *priv, - const struct sk_buff *skb, int *frame_len, - int *cmd_len, u16 transid) + const struct sk_buff *skb, int *cmd_len, + u16 transid) { struct kvaser_usb *dev = priv->dev; struct kvaser_cmd_ext *cmd; @@ -1384,8 +1388,6 @@ kvaser_usb_hydra_frame_to_cmd_ext(const struct kvaser_usb_net_priv *priv, u32 kcan_id; u32 kcan_header; - *frame_len = nbr_of_bytes; - cmd = kcalloc(1, sizeof(struct kvaser_cmd_ext), GFP_ATOMIC); if (!cmd) return NULL; @@ -1451,8 +1453,8 @@ kvaser_usb_hydra_frame_to_cmd_ext(const struct kvaser_usb_net_priv *priv, static void * kvaser_usb_hydra_frame_to_cmd_std(const struct kvaser_usb_net_priv *priv, - const struct sk_buff *skb, int *frame_len, - int *cmd_len, u16 transid) + const struct sk_buff *skb, int *cmd_len, + u16 transid) { struct kvaser_usb *dev = priv->dev; struct kvaser_cmd *cmd; @@ -1460,8 +1462,6 @@ kvaser_usb_hydra_frame_to_cmd_std(const struct kvaser_usb_net_priv *priv, u32 flags; u32 id; - *frame_len = cf->len; - cmd = kcalloc(1, sizeof(struct kvaser_cmd), GFP_ATOMIC); if (!cmd) return NULL; @@ -1495,7 +1495,7 @@ kvaser_usb_hydra_frame_to_cmd_std(const struct kvaser_usb_net_priv *priv, cmd->tx_can.id = cpu_to_le32(id); cmd->tx_can.flags = flags; - memcpy(cmd->tx_can.data, cf->data, *frame_len); + memcpy(cmd->tx_can.data, cf->data, cf->len); return cmd; } @@ -2003,17 +2003,17 @@ static void kvaser_usb_hydra_read_bulk_callback(struct kvaser_usb *dev, static void * kvaser_usb_hydra_frame_to_cmd(const struct kvaser_usb_net_priv *priv, - const struct sk_buff *skb, int *frame_len, - int *cmd_len, u16 transid) + const struct sk_buff *skb, int *cmd_len, + u16 transid) { void *buf; if (priv->dev->card_data.capabilities & KVASER_USB_HYDRA_CAP_EXT_CMD) - buf = kvaser_usb_hydra_frame_to_cmd_ext(priv, skb, frame_len, - cmd_len, transid); + buf = kvaser_usb_hydra_frame_to_cmd_ext(priv, skb, cmd_len, + transid); else - buf = kvaser_usb_hydra_frame_to_cmd_std(priv, skb, frame_len, - cmd_len, transid); + buf = kvaser_usb_hydra_frame_to_cmd_std(priv, skb, cmd_len, + transid); return buf; } @@ -2040,7 +2040,7 @@ const struct kvaser_usb_dev_ops kvaser_usb_hydra_dev_ops = { static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_kcan = { .clock = { - .freq = 80000000, + .freq = 80 * MEGA /* Hz */, }, .timestamp_freq = 80, .bittiming_const = &kvaser_usb_hydra_kcan_bittiming_c, @@ -2049,7 +2049,7 @@ static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_kcan = { static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_flexc = { .clock = { - .freq = 24000000, + .freq = 24 * MEGA /* Hz */, }, .timestamp_freq = 1, .bittiming_const = &kvaser_usb_hydra_flexc_bittiming_c, @@ -2057,7 +2057,7 @@ static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_flexc = { static const struct kvaser_usb_dev_cfg kvaser_usb_hydra_dev_cfg_rt = { .clock = { - .freq = 80000000, + .freq = 80 * MEGA /* Hz */, }, .timestamp_freq = 24, .bittiming_const = &kvaser_usb_hydra_rt_bittiming_c, diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c index 59ba7c7beec0..c805b999c543 100644 --- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c @@ -19,6 +19,7 @@ #include <linux/spinlock.h> #include <linux/string.h> #include <linux/types.h> +#include <linux/units.h> #include <linux/usb.h> #include <linux/can.h> @@ -28,10 +29,6 @@ #include "kvaser_usb.h" -/* Forward declaration */ -static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_dev_cfg; - -#define CAN_USB_CLOCK 8000000 #define MAX_USBCAN_NET_DEVICES 2 /* Command header size */ @@ -80,6 +77,12 @@ static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_dev_cfg; #define CMD_LEAF_LOG_MESSAGE 106 +/* Leaf frequency options */ +#define KVASER_USB_LEAF_SWOPTION_FREQ_MASK 0x60 +#define KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK 0 +#define KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK BIT(5) +#define KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK BIT(6) + /* error factors */ #define M16C_EF_ACKE BIT(0) #define M16C_EF_CRCE BIT(1) @@ -340,18 +343,60 @@ struct kvaser_usb_err_summary { }; }; +static const struct can_bittiming_const kvaser_usb_leaf_bittiming_const = { + .name = "kvaser_usb", + .tseg1_min = KVASER_USB_TSEG1_MIN, + .tseg1_max = KVASER_USB_TSEG1_MAX, + .tseg2_min = KVASER_USB_TSEG2_MIN, + .tseg2_max = KVASER_USB_TSEG2_MAX, + .sjw_max = KVASER_USB_SJW_MAX, + .brp_min = KVASER_USB_BRP_MIN, + .brp_max = KVASER_USB_BRP_MAX, + .brp_inc = KVASER_USB_BRP_INC, +}; + +static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_dev_cfg_8mhz = { + .clock = { + .freq = 8 * MEGA /* Hz */, + }, + .timestamp_freq = 1, + .bittiming_const = &kvaser_usb_leaf_bittiming_const, +}; + +static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_dev_cfg_16mhz = { + .clock = { + .freq = 16 * MEGA /* Hz */, + }, + .timestamp_freq = 1, + .bittiming_const = &kvaser_usb_leaf_bittiming_const, +}; + +static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_dev_cfg_24mhz = { + .clock = { + .freq = 24 * MEGA /* Hz */, + }, + .timestamp_freq = 1, + .bittiming_const = &kvaser_usb_leaf_bittiming_const, +}; + +static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_dev_cfg_32mhz = { + .clock = { + .freq = 32 * MEGA /* Hz */, + }, + .timestamp_freq = 1, + .bittiming_const = &kvaser_usb_leaf_bittiming_const, +}; + static void * kvaser_usb_leaf_frame_to_cmd(const struct kvaser_usb_net_priv *priv, - const struct sk_buff *skb, int *frame_len, - int *cmd_len, u16 transid) + const struct sk_buff *skb, int *cmd_len, + u16 transid) { struct kvaser_usb *dev = priv->dev; struct kvaser_cmd *cmd; u8 *cmd_tx_can_flags = NULL; /* GCC */ struct can_frame *cf = (struct can_frame *)skb->data; - *frame_len = cf->len; - cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC); if (cmd) { cmd->u.tx_can.tid = transid & 0xff; @@ -471,6 +516,27 @@ static int kvaser_usb_leaf_send_simple_cmd(const struct kvaser_usb *dev, return rc; } +static void kvaser_usb_leaf_get_software_info_leaf(struct kvaser_usb *dev, + const struct leaf_cmd_softinfo *softinfo) +{ + u32 sw_options = le32_to_cpu(softinfo->sw_options); + + dev->fw_version = le32_to_cpu(softinfo->fw_version); + dev->max_tx_urbs = le16_to_cpu(softinfo->max_outstanding_tx); + + switch (sw_options & KVASER_USB_LEAF_SWOPTION_FREQ_MASK) { + case KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK: + dev->cfg = &kvaser_usb_leaf_dev_cfg_16mhz; + break; + case KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK: + dev->cfg = &kvaser_usb_leaf_dev_cfg_24mhz; + break; + case KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK: + dev->cfg = &kvaser_usb_leaf_dev_cfg_32mhz; + break; + } +} + static int kvaser_usb_leaf_get_software_info_inner(struct kvaser_usb *dev) { struct kvaser_cmd cmd; @@ -486,14 +552,13 @@ static int kvaser_usb_leaf_get_software_info_inner(struct kvaser_usb *dev) switch (dev->card_data.leaf.family) { case KVASER_LEAF: - dev->fw_version = le32_to_cpu(cmd.u.leaf.softinfo.fw_version); - dev->max_tx_urbs = - le16_to_cpu(cmd.u.leaf.softinfo.max_outstanding_tx); + kvaser_usb_leaf_get_software_info_leaf(dev, &cmd.u.leaf.softinfo); break; case KVASER_USBCAN: dev->fw_version = le32_to_cpu(cmd.u.usbcan.softinfo.fw_version); dev->max_tx_urbs = le16_to_cpu(cmd.u.usbcan.softinfo.max_outstanding_tx); + dev->cfg = &kvaser_usb_leaf_dev_cfg_8mhz; break; } @@ -575,8 +640,6 @@ static void kvaser_usb_leaf_tx_acknowledge(const struct kvaser_usb *dev, if (skb) { cf->can_id |= CAN_ERR_RESTARTED; - stats->rx_packets++; - stats->rx_bytes += cf->len; netif_rx(skb); } else { netdev_err(priv->netdev, @@ -589,12 +652,11 @@ static void kvaser_usb_leaf_tx_acknowledge(const struct kvaser_usb *dev, priv->can.state = CAN_STATE_ERROR_ACTIVE; } - stats->tx_packets++; - stats->tx_bytes += context->dlc; - spin_lock_irqsave(&priv->tx_contexts_lock, flags); - can_get_echo_skb(priv->netdev, context->echo_index, NULL); + stats->tx_packets++; + stats->tx_bytes += can_get_echo_skb(priv->netdev, + context->echo_index, NULL); context->echo_index = dev->max_tx_urbs; --priv->active_tx_contexts; netif_wake_queue(priv->netdev); @@ -777,8 +839,6 @@ static void kvaser_usb_leaf_rx_error(const struct kvaser_usb *dev, cf->data[6] = es->txerr; cf->data[7] = es->rxerr; - stats->rx_packets++; - stats->rx_bytes += cf->len; netif_rx(skb); } @@ -1005,7 +1065,8 @@ static void kvaser_usb_leaf_rx_can_msg(const struct kvaser_usb *dev, } stats->rx_packets++; - stats->rx_bytes += cf->len; + if (!(cf->can_id & CAN_RTR_FLAG)) + stats->rx_bytes += cf->len; netif_rx(skb); } @@ -1225,24 +1286,11 @@ static int kvaser_usb_leaf_init_card(struct kvaser_usb *dev) { struct kvaser_usb_dev_card_data *card_data = &dev->card_data; - dev->cfg = &kvaser_usb_leaf_dev_cfg; card_data->ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES; return 0; } -static const struct can_bittiming_const kvaser_usb_leaf_bittiming_const = { - .name = "kvaser_usb", - .tseg1_min = KVASER_USB_TSEG1_MIN, - .tseg1_max = KVASER_USB_TSEG1_MAX, - .tseg2_min = KVASER_USB_TSEG2_MIN, - .tseg2_max = KVASER_USB_TSEG2_MAX, - .sjw_max = KVASER_USB_SJW_MAX, - .brp_min = KVASER_USB_BRP_MIN, - .brp_max = KVASER_USB_BRP_MAX, - .brp_inc = KVASER_USB_BRP_INC, -}; - static int kvaser_usb_leaf_set_bittiming(struct net_device *netdev) { struct kvaser_usb_net_priv *priv = netdev_priv(netdev); @@ -1348,11 +1396,3 @@ const struct kvaser_usb_dev_ops kvaser_usb_leaf_dev_ops = { .dev_read_bulk_callback = kvaser_usb_leaf_read_bulk_callback, .dev_frame_to_cmd = kvaser_usb_leaf_frame_to_cmd, }; - -static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_dev_cfg = { - .clock = { - .freq = CAN_USB_CLOCK, - }, - .timestamp_freq = 1, - .bittiming_const = &kvaser_usb_leaf_bittiming_const, -}; diff --git a/drivers/net/can/usb/mcba_usb.c b/drivers/net/can/usb/mcba_usb.c index a1a154c08b7f..77bddff86252 100644 --- a/drivers/net/can/usb/mcba_usb.c +++ b/drivers/net/can/usb/mcba_usb.c @@ -64,7 +64,6 @@ struct mcba_usb_ctx { struct mcba_priv *priv; u32 ndx; - u8 dlc; bool can; }; @@ -184,13 +183,10 @@ static inline struct mcba_usb_ctx *mcba_usb_get_free_ctx(struct mcba_priv *priv, ctx = &priv->tx_context[i]; ctx->ndx = i; - if (cf) { + if (cf) ctx->can = true; - ctx->dlc = cf->len; - } else { + else ctx->can = false; - ctx->dlc = 0; - } atomic_dec(&priv->free_ctx_cnt); break; @@ -236,10 +232,10 @@ static void mcba_usb_write_bulk_callback(struct urb *urb) return; netdev->stats.tx_packets++; - netdev->stats.tx_bytes += ctx->dlc; + netdev->stats.tx_bytes += can_get_echo_skb(netdev, ctx->ndx, + NULL); can_led_event(netdev, CAN_LED_EVENT_TX); - can_get_echo_skb(netdev, ctx->ndx, NULL); } if (urb->status) @@ -450,15 +446,16 @@ static void mcba_usb_process_can(struct mcba_priv *priv, cf->can_id = (sid & 0xffe0) >> 5; } - if (msg->dlc & MCBA_DLC_RTR_MASK) - cf->can_id |= CAN_RTR_FLAG; - cf->len = can_cc_dlc2len(msg->dlc & MCBA_DLC_MASK); - memcpy(cf->data, msg->data, cf->len); + if (msg->dlc & MCBA_DLC_RTR_MASK) { + cf->can_id |= CAN_RTR_FLAG; + } else { + memcpy(cf->data, msg->data, cf->len); + stats->rx_bytes += cf->len; + } stats->rx_packets++; - stats->rx_bytes += cf->len; can_led_event(priv->netdev, CAN_LED_EVENT_RX); netif_rx(skb); diff --git a/drivers/net/can/usb/peak_usb/pcan_usb.c b/drivers/net/can/usb/peak_usb/pcan_usb.c index 876218752766..17dc178f555b 100644 --- a/drivers/net/can/usb/peak_usb/pcan_usb.c +++ b/drivers/net/can/usb/peak_usb/pcan_usb.c @@ -8,6 +8,7 @@ * * Many thanks to Klaus Hitschler <klaus.hitschler@gmx.de> */ +#include <asm/unaligned.h> #include <linux/netdevice.h> #include <linux/usb.h> #include <linux/module.h> @@ -520,8 +521,6 @@ static int pcan_usb_decode_error(struct pcan_usb_msg_context *mc, u8 n, &hwts->hwtstamp); } - mc->netdev->stats.rx_packets++; - mc->netdev->stats.rx_bytes += cf->len; netif_rx(skb); return 0; @@ -678,15 +677,16 @@ static int pcan_usb_decode_data(struct pcan_usb_msg_context *mc, u8 status_len) /* Ignore next byte (client private id) if SRR bit is set */ if (can_id_flags & PCAN_USB_TX_SRR) mc->ptr++; + + /* update statistics */ + mc->netdev->stats.rx_bytes += cf->len; } + mc->netdev->stats.rx_packets++; /* convert timestamp into kernel time */ hwts = skb_hwtstamps(skb); peak_usb_get_ts_time(&mc->pdev->time_ref, mc->ts16, &hwts->hwtstamp); - /* update statistics */ - mc->netdev->stats.rx_packets++; - mc->netdev->stats.rx_bytes += cf->len; /* push the skb */ netif_rx(skb); diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_core.c b/drivers/net/can/usb/peak_usb/pcan_usb_core.c index 6107fef9f4a0..b850ff8fe4bd 100644 --- a/drivers/net/can/usb/peak_usb/pcan_usb_core.c +++ b/drivers/net/can/usb/peak_usb/pcan_usb_core.c @@ -291,6 +291,7 @@ static void peak_usb_write_bulk_callback(struct urb *urb) struct peak_tx_urb_context *context = urb->context; struct peak_usb_device *dev; struct net_device *netdev; + int tx_bytes; BUG_ON(!context); @@ -305,10 +306,6 @@ static void peak_usb_write_bulk_callback(struct urb *urb) /* check tx status */ switch (urb->status) { case 0: - /* transmission complete */ - netdev->stats.tx_packets++; - netdev->stats.tx_bytes += context->data_len; - /* prevent tx timeout */ netif_trans_update(netdev); break; @@ -327,12 +324,17 @@ static void peak_usb_write_bulk_callback(struct urb *urb) } /* should always release echo skb and corresponding context */ - can_get_echo_skb(netdev, context->echo_index, NULL); + tx_bytes = can_get_echo_skb(netdev, context->echo_index, NULL); context->echo_index = PCAN_USB_MAX_TX_URBS; - /* do wakeup tx queue in case of success only */ - if (!urb->status) + if (!urb->status) { + /* transmission complete */ + netdev->stats.tx_packets++; + netdev->stats.tx_bytes += tx_bytes; + + /* do wakeup tx queue in case of success only */ netif_wake_queue(netdev); + } } /* @@ -344,7 +346,6 @@ static netdev_tx_t peak_usb_ndo_start_xmit(struct sk_buff *skb, struct peak_usb_device *dev = netdev_priv(netdev); struct peak_tx_urb_context *context = NULL; struct net_device_stats *stats = &netdev->stats; - struct canfd_frame *cfd = (struct canfd_frame *)skb->data; struct urb *urb; u8 *obuf; int i, err; @@ -378,9 +379,6 @@ static netdev_tx_t peak_usb_ndo_start_xmit(struct sk_buff *skb, context->echo_index = i; - /* Note: this works with CANFD frames too */ - context->data_len = cfd->len; - usb_anchor_urb(urb, &dev->tx_submitted); can_put_echo_skb(skb, netdev, context->echo_index, 0); diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_core.h b/drivers/net/can/usb/peak_usb/pcan_usb_core.h index daa19f57e742..f60af573a2e0 100644 --- a/drivers/net/can/usb/peak_usb/pcan_usb_core.h +++ b/drivers/net/can/usb/peak_usb/pcan_usb_core.h @@ -99,7 +99,6 @@ struct peak_time_ref { struct peak_tx_urb_context { struct peak_usb_device *dev; u32 echo_index; - u8 data_len; struct urb *urb; }; diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_fd.c b/drivers/net/can/usb/peak_usb/pcan_usb_fd.c index 6bd12549f101..65487ec33566 100644 --- a/drivers/net/can/usb/peak_usb/pcan_usb_fd.c +++ b/drivers/net/can/usb/peak_usb/pcan_usb_fd.c @@ -507,13 +507,13 @@ static int pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if *usb_if, if (rx_msg_flags & PUCAN_MSG_EXT_ID) cfd->can_id |= CAN_EFF_FLAG; - if (rx_msg_flags & PUCAN_MSG_RTR) + if (rx_msg_flags & PUCAN_MSG_RTR) { cfd->can_id |= CAN_RTR_FLAG; - else + } else { memcpy(cfd->data, rm->d, cfd->len); - + netdev->stats.rx_bytes += cfd->len; + } netdev->stats.rx_packets++; - netdev->stats.rx_bytes += cfd->len; peak_usb_netif_rx_64(skb, le32_to_cpu(rm->ts_low), le32_to_cpu(rm->ts_high)); @@ -577,9 +577,6 @@ static int pcan_usb_fd_decode_status(struct pcan_usb_fd_if *usb_if, if (!skb) return -ENOMEM; - netdev->stats.rx_packets++; - netdev->stats.rx_bytes += cf->len; - peak_usb_netif_rx_64(skb, le32_to_cpu(sm->ts_low), le32_to_cpu(sm->ts_high)); diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_pro.c b/drivers/net/can/usb/peak_usb/pcan_usb_pro.c index 858ab22708fc..ebe087f258e3 100644 --- a/drivers/net/can/usb/peak_usb/pcan_usb_pro.c +++ b/drivers/net/can/usb/peak_usb/pcan_usb_pro.c @@ -536,17 +536,19 @@ static int pcan_usb_pro_handle_canmsg(struct pcan_usb_pro_interface *usb_if, if (rx->flags & PCAN_USBPRO_EXT) can_frame->can_id |= CAN_EFF_FLAG; - if (rx->flags & PCAN_USBPRO_RTR) + if (rx->flags & PCAN_USBPRO_RTR) { can_frame->can_id |= CAN_RTR_FLAG; - else + } else { memcpy(can_frame->data, rx->data, can_frame->len); + netdev->stats.rx_bytes += can_frame->len; + } + netdev->stats.rx_packets++; + hwts = skb_hwtstamps(skb); peak_usb_get_ts_time(&usb_if->time_ref, le32_to_cpu(rx->ts32), &hwts->hwtstamp); - netdev->stats.rx_packets++; - netdev->stats.rx_bytes += can_frame->len; netif_rx(skb); return 0; @@ -660,8 +662,6 @@ static int pcan_usb_pro_handle_error(struct pcan_usb_pro_interface *usb_if, hwts = skb_hwtstamps(skb); peak_usb_get_ts_time(&usb_if->time_ref, le32_to_cpu(er->ts32), &hwts->hwtstamp); - netdev->stats.rx_packets++; - netdev->stats.rx_bytes += can_frame->len; netif_rx(skb); return 0; diff --git a/drivers/net/can/usb/ucan.c b/drivers/net/can/usb/ucan.c index 1679cbe45ded..c7c41d1fd038 100644 --- a/drivers/net/can/usb/ucan.c +++ b/drivers/net/can/usb/ucan.c @@ -259,7 +259,6 @@ struct ucan_priv; /* Context Information for transmission URBs */ struct ucan_urb_context { struct ucan_priv *up; - u8 dlc; bool allocated; }; @@ -621,8 +620,11 @@ static void ucan_rx_can_msg(struct ucan_priv *up, struct ucan_message_in *m) memcpy(cf->data, m->msg.can_msg.data, cf->len); /* don't count error frames as real packets */ - stats->rx_packets++; - stats->rx_bytes += cf->len; + if (!(cf->can_id & CAN_ERR_FLAG)) { + stats->rx_packets++; + if (!(cf->can_id & CAN_RTR_FLAG)) + stats->rx_bytes += cf->len; + } /* pass it to Linux */ netif_rx(skb); @@ -634,7 +636,7 @@ static void ucan_tx_complete_msg(struct ucan_priv *up, { unsigned long flags; u16 count, i; - u8 echo_index, dlc; + u8 echo_index; u16 len = le16_to_cpu(m->len); struct ucan_urb_context *context; @@ -658,7 +660,6 @@ static void ucan_tx_complete_msg(struct ucan_priv *up, /* gather information from the context */ context = &up->context_array[echo_index]; - dlc = READ_ONCE(context->dlc); /* Release context and restart queue if necessary. * Also check if the context was allocated @@ -671,8 +672,8 @@ static void ucan_tx_complete_msg(struct ucan_priv *up, UCAN_TX_COMPLETE_SUCCESS) { /* update statistics */ up->netdev->stats.tx_packets++; - up->netdev->stats.tx_bytes += dlc; - can_get_echo_skb(up->netdev, echo_index, NULL); + up->netdev->stats.tx_bytes += + can_get_echo_skb(up->netdev, echo_index, NULL); } else { up->netdev->stats.tx_dropped++; can_free_echo_skb(up->netdev, echo_index, NULL); @@ -1086,8 +1087,6 @@ static struct urb *ucan_prepare_tx_urb(struct ucan_priv *up, } m->len = cpu_to_le16(mlen); - context->dlc = cf->len; - m->subtype = echo_index; /* build the urb */ diff --git a/drivers/net/can/usb/usb_8dev.c b/drivers/net/can/usb/usb_8dev.c index d1b83bd1b3cb..431af1ec1e3c 100644 --- a/drivers/net/can/usb/usb_8dev.c +++ b/drivers/net/can/usb/usb_8dev.c @@ -114,15 +114,12 @@ struct usb_8dev_tx_urb_context { struct usb_8dev_priv *priv; u32 echo_index; - u8 dlc; }; /* Structure to hold all of our device specific stuff */ struct usb_8dev_priv { struct can_priv can; /* must be the first member */ - struct sk_buff *echo_skb[MAX_TX_URBS]; - struct usb_device *udev; struct net_device *netdev; @@ -449,8 +446,6 @@ static void usb_8dev_rx_err_msg(struct usb_8dev_priv *priv, priv->bec.txerr = txerr; priv->bec.rxerr = rxerr; - stats->rx_packets++; - stats->rx_bytes += cf->len; netif_rx(skb); } @@ -476,13 +471,14 @@ static void usb_8dev_rx_can_msg(struct usb_8dev_priv *priv, if (msg->flags & USB_8DEV_EXTID) cf->can_id |= CAN_EFF_FLAG; - if (msg->flags & USB_8DEV_RTR) + if (msg->flags & USB_8DEV_RTR) { cf->can_id |= CAN_RTR_FLAG; - else + } else { memcpy(cf->data, msg->data, cf->len); - + stats->rx_bytes += cf->len; + } stats->rx_packets++; - stats->rx_bytes += cf->len; + netif_rx(skb); can_led_event(priv->netdev, CAN_LED_EVENT_RX); @@ -584,9 +580,7 @@ static void usb_8dev_write_bulk_callback(struct urb *urb) urb->status); netdev->stats.tx_packets++; - netdev->stats.tx_bytes += context->dlc; - - can_get_echo_skb(netdev, context->echo_index, NULL); + netdev->stats.tx_bytes += can_get_echo_skb(netdev, context->echo_index, NULL); can_led_event(netdev, CAN_LED_EVENT_TX); @@ -657,7 +651,6 @@ static netdev_tx_t usb_8dev_start_xmit(struct sk_buff *skb, context->priv = priv; context->echo_index = i; - context->dlc = cf->len; usb_fill_bulk_urb(urb, priv->udev, usb_sndbulkpipe(priv->udev, USB_8DEV_ENDP_DATA_TX), diff --git a/drivers/net/can/vcan.c b/drivers/net/can/vcan.c index 067705e2850b..c42f18845b02 100644 --- a/drivers/net/can/vcan.c +++ b/drivers/net/can/vcan.c @@ -87,13 +87,14 @@ static netdev_tx_t vcan_tx(struct sk_buff *skb, struct net_device *dev) { struct canfd_frame *cfd = (struct canfd_frame *)skb->data; struct net_device_stats *stats = &dev->stats; - int loop; + int loop, len; if (can_dropped_invalid_skb(dev, skb)) return NETDEV_TX_OK; + len = cfd->can_id & CAN_RTR_FLAG ? 0 : cfd->len; stats->tx_packets++; - stats->tx_bytes += cfd->len; + stats->tx_bytes += len; /* set flag whether this packet has to be looped back */ loop = skb->pkt_type == PACKET_LOOPBACK; @@ -105,7 +106,7 @@ static netdev_tx_t vcan_tx(struct sk_buff *skb, struct net_device *dev) * CAN core already did the echo for us */ stats->rx_packets++; - stats->rx_bytes += cfd->len; + stats->rx_bytes += len; } consume_skb(skb); return NETDEV_TX_OK; diff --git a/drivers/net/can/vxcan.c b/drivers/net/can/vxcan.c index 8861a7d875e7..47ccc15a3486 100644 --- a/drivers/net/can/vxcan.c +++ b/drivers/net/can/vxcan.c @@ -62,7 +62,7 @@ static netdev_tx_t vxcan_xmit(struct sk_buff *skb, struct net_device *dev) skb->dev = peer; skb->ip_summed = CHECKSUM_UNNECESSARY; - len = cfd->len; + len = cfd->can_id & CAN_RTR_FLAG ? 0 : cfd->len; if (netif_rx_ni(skb) == NET_RX_SUCCESS) { srcstats->tx_packets++; srcstats->tx_bytes += len; diff --git a/drivers/net/can/xilinx_can.c b/drivers/net/can/xilinx_can.c index e2b15d29d15e..1674b561c9a2 100644 --- a/drivers/net/can/xilinx_can.c +++ b/drivers/net/can/xilinx_can.c @@ -787,10 +787,11 @@ static int xcan_rx(struct net_device *ndev, int frame_base) *(__be32 *)(cf->data) = cpu_to_be32(data[0]); if (cf->len > 4) *(__be32 *)(cf->data + 4) = cpu_to_be32(data[1]); - } - stats->rx_bytes += cf->len; + stats->rx_bytes += cf->len; + } stats->rx_packets++; + netif_receive_skb(skb); return 1; @@ -871,8 +872,11 @@ static int xcanfd_rx(struct net_device *ndev, int frame_base) *(__be32 *)(cf->data + i) = cpu_to_be32(data[0]); } } - stats->rx_bytes += cf->len; + + if (!(cf->can_id & CAN_RTR_FLAG)) + stats->rx_bytes += cf->len; stats->rx_packets++; + netif_receive_skb(skb); return 1; @@ -965,13 +969,8 @@ static void xcan_update_error_state_after_rxtx(struct net_device *ndev) xcan_set_error_state(ndev, new_state, skb ? cf : NULL); - if (skb) { - struct net_device_stats *stats = &ndev->stats; - - stats->rx_packets++; - stats->rx_bytes += cf->len; + if (skb) netif_rx(skb); - } } } @@ -1095,8 +1094,6 @@ static void xcan_err_interrupt(struct net_device *ndev, u32 isr) if (skb) { skb_cf->can_id |= cf.can_id; memcpy(skb_cf->data, cf.data, CAN_ERR_DLC); - stats->rx_packets++; - stats->rx_bytes += CAN_ERR_DLC; netif_rx(skb); } } @@ -1761,7 +1758,12 @@ static int xcan_probe(struct platform_device *pdev) spin_lock_init(&priv->tx_lock); /* Get IRQ for the device */ - ndev->irq = platform_get_irq(pdev, 0); + ret = platform_get_irq(pdev, 0); + if (ret < 0) + goto err_free; + + ndev->irq = ret; + ndev->flags |= IFF_ECHO; /* We support local echo */ platform_set_drvdata(pdev, ndev); |