From: Jimmy Assarsson <extja@xxxxxxxxxx> Refactor code; - Format code - Rename variables and macros - Remove intermediate variables - Add/remove blank lines - Reduce scope of variables - Add helper functions Signed-off-by: Jimmy Assarsson <extja@xxxxxxxxxx> Reviewed-by: Vincent Mailhol <mailhol.vincent@xxxxxxxxxx> Link: https://lore.kernel.org/all/20230529134248.752036-14-extja@xxxxxxxxxx Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx> --- drivers/net/can/kvaser_pciefd.c | 221 +++++++++++++------------------- 1 file changed, 87 insertions(+), 134 deletions(-) diff --git a/drivers/net/can/kvaser_pciefd.c b/drivers/net/can/kvaser_pciefd.c index e3d730264462..0321b70a3b71 100644 --- a/drivers/net/can/kvaser_pciefd.c +++ b/drivers/net/can/kvaser_pciefd.c @@ -70,7 +70,7 @@ MODULE_DESCRIPTION("CAN driver for Kvaser CAN/PCIe devices"); #define KVASER_PCIEFD_KCAN_CMD_REG 0x400 #define KVASER_PCIEFD_KCAN_IEN_REG 0x408 #define KVASER_PCIEFD_KCAN_IRQ_REG 0x410 -#define KVASER_PCIEFD_KCAN_TX_NPACKETS_REG 0x414 +#define KVASER_PCIEFD_KCAN_TX_NR_PACKETS_REG 0x414 #define KVASER_PCIEFD_KCAN_STAT_REG 0x418 #define KVASER_PCIEFD_KCAN_MODE_REG 0x41c #define KVASER_PCIEFD_KCAN_BTRN_REG 0x420 @@ -124,6 +124,8 @@ MODULE_DESCRIPTION("CAN driver for Kvaser CAN/PCIe devices"); /* Command sequence number */ #define KVASER_PCIEFD_KCAN_CMD_SEQ_MASK GENMASK(23, 16) +/* Command bits */ +#define KVASER_PCIEFD_KCAN_CMD_MASK GENMASK(5, 0) /* Abort, flush and reset */ #define KVASER_PCIEFD_KCAN_CMD_AT BIT(1) /* Request status packet */ @@ -172,9 +174,9 @@ MODULE_DESCRIPTION("CAN driver for Kvaser CAN/PCIe devices"); /* Abort request */ #define KVASER_PCIEFD_KCAN_STAT_AR BIT(7) /* Controller is bus off */ -#define KVASER_PCIEFD_KCAN_STAT_BUS_OFF_MSK (KVASER_PCIEFD_KCAN_STAT_AR | \ - KVASER_PCIEFD_KCAN_STAT_BOFF | KVASER_PCIEFD_KCAN_STAT_RMR | \ - KVASER_PCIEFD_KCAN_STAT_IRM) +#define KVASER_PCIEFD_KCAN_STAT_BUS_OFF_MASK \ + (KVASER_PCIEFD_KCAN_STAT_AR | KVASER_PCIEFD_KCAN_STAT_BOFF | \ + KVASER_PCIEFD_KCAN_STAT_RMR | KVASER_PCIEFD_KCAN_STAT_IRM) /* Classic CAN mode */ #define KVASER_PCIEFD_KCAN_MODE_CCM BIT(31) @@ -202,15 +204,15 @@ MODULE_DESCRIPTION("CAN driver for Kvaser CAN/PCIe devices"); #define KVASER_PCIEFD_KCAN_PWM_TRIGGER_MASK GENMASK(7, 0) /* KCAN packet type IDs */ -#define KVASER_PCIEFD_PACK_TYPE_DATA 0 -#define KVASER_PCIEFD_PACK_TYPE_ACK 1 -#define KVASER_PCIEFD_PACK_TYPE_TXRQ 2 -#define KVASER_PCIEFD_PACK_TYPE_ERROR 3 -#define KVASER_PCIEFD_PACK_TYPE_EFLUSH_ACK 4 -#define KVASER_PCIEFD_PACK_TYPE_EFRAME_ACK 5 -#define KVASER_PCIEFD_PACK_TYPE_ACK_DATA 6 -#define KVASER_PCIEFD_PACK_TYPE_STATUS 8 -#define KVASER_PCIEFD_PACK_TYPE_BUS_LOAD 9 +#define KVASER_PCIEFD_PACK_TYPE_DATA 0x0 +#define KVASER_PCIEFD_PACK_TYPE_ACK 0x1 +#define KVASER_PCIEFD_PACK_TYPE_TXRQ 0x2 +#define KVASER_PCIEFD_PACK_TYPE_ERROR 0x3 +#define KVASER_PCIEFD_PACK_TYPE_EFLUSH_ACK 0x4 +#define KVASER_PCIEFD_PACK_TYPE_EFRAME_ACK 0x5 +#define KVASER_PCIEFD_PACK_TYPE_ACK_DATA 0x6 +#define KVASER_PCIEFD_PACK_TYPE_STATUS 0x8 +#define KVASER_PCIEFD_PACK_TYPE_BUS_LOAD 0x9 /* Common KCAN packet definitions, second word */ #define KVASER_PCIEFD_PACKET_TYPE_MASK GENMASK(31, 28) @@ -322,13 +324,21 @@ static struct pci_device_id kvaser_pciefd_id_table[] = { }; MODULE_DEVICE_TABLE(pci, kvaser_pciefd_id_table); -static void kvaser_pciefd_request_status(struct kvaser_pciefd_can *can) +static inline void kvaser_pciefd_send_kcan_cmd(struct kvaser_pciefd_can *can, u32 cmd) { - u32 cmd; + iowrite32(FIELD_PREP(KVASER_PCIEFD_KCAN_CMD_MASK, cmd) | + FIELD_PREP(KVASER_PCIEFD_KCAN_CMD_SEQ_MASK, ++can->cmd_seq), + can->reg_base + KVASER_PCIEFD_KCAN_CMD_REG); +} - cmd = KVASER_PCIEFD_KCAN_CMD_SRQ; - cmd |= FIELD_PREP(KVASER_PCIEFD_KCAN_CMD_SEQ_MASK, ++can->cmd_seq); - iowrite32(cmd, can->reg_base + KVASER_PCIEFD_KCAN_CMD_REG); +static inline void kvaser_pciefd_request_status(struct kvaser_pciefd_can *can) +{ + kvaser_pciefd_send_kcan_cmd(can, KVASER_PCIEFD_KCAN_CMD_SRQ); +} + +static inline void kvaser_pciefd_abort_flush_reset(struct kvaser_pciefd_can *can) +{ + kvaser_pciefd_send_kcan_cmd(can, KVASER_PCIEFD_KCAN_CMD_AT); } static void kvaser_pciefd_enable_err_gen(struct kvaser_pciefd_can *can) @@ -383,7 +393,6 @@ static void kvaser_pciefd_setup_controller(struct kvaser_pciefd_can *can) unsigned long irq; spin_lock_irqsave(&can->lock, irq); - mode = ioread32(can->reg_base + KVASER_PCIEFD_KCAN_MODE_REG); if (can->can.ctrlmode & CAN_CTRLMODE_FD) { mode &= ~KVASER_PCIEFD_KCAN_MODE_CCM; @@ -400,7 +409,6 @@ static void kvaser_pciefd_setup_controller(struct kvaser_pciefd_can *can) mode |= KVASER_PCIEFD_KCAN_MODE_LOM; else mode &= ~KVASER_PCIEFD_KCAN_MODE_LOM; - mode |= KVASER_PCIEFD_KCAN_MODE_EEN; mode |= KVASER_PCIEFD_KCAN_MODE_EPEN; /* Use ACK packet type */ @@ -417,18 +425,13 @@ static void kvaser_pciefd_start_controller_flush(struct kvaser_pciefd_can *can) unsigned long irq; spin_lock_irqsave(&can->lock, irq); - iowrite32(-1, can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG); + iowrite32(GENMASK(31, 0), can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG); iowrite32(KVASER_PCIEFD_KCAN_IRQ_ABD, can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG); - status = ioread32(can->reg_base + KVASER_PCIEFD_KCAN_STAT_REG); if (status & KVASER_PCIEFD_KCAN_STAT_IDLE) { - u32 cmd; - /* If controller is already idle, run abort, flush and reset */ - cmd = KVASER_PCIEFD_KCAN_CMD_AT; - cmd |= FIELD_PREP(KVASER_PCIEFD_KCAN_CMD_SEQ_MASK, ++can->cmd_seq); - iowrite32(cmd, can->reg_base + KVASER_PCIEFD_KCAN_CMD_REG); + kvaser_pciefd_abort_flush_reset(can); } else if (!(status & KVASER_PCIEFD_KCAN_STAT_RMR)) { u32 mode; @@ -437,7 +440,6 @@ static void kvaser_pciefd_start_controller_flush(struct kvaser_pciefd_can *can) mode |= KVASER_PCIEFD_KCAN_MODE_RM; iowrite32(mode, can->reg_base + KVASER_PCIEFD_KCAN_MODE_REG); } - spin_unlock_irqrestore(&can->lock, irq); } @@ -447,7 +449,6 @@ static int kvaser_pciefd_bus_on(struct kvaser_pciefd_can *can) unsigned long irq; del_timer(&can->bec_poll_timer); - if (!completion_done(&can->flush_comp)) kvaser_pciefd_start_controller_flush(can); @@ -459,11 +460,9 @@ static int kvaser_pciefd_bus_on(struct kvaser_pciefd_can *can) spin_lock_irqsave(&can->lock, irq); iowrite32(0, can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG); - iowrite32(-1, can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG); - + iowrite32(GENMASK(31, 0), can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG); iowrite32(KVASER_PCIEFD_KCAN_IRQ_ABD, can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG); - mode = ioread32(can->reg_base + KVASER_PCIEFD_KCAN_MODE_REG); mode &= ~KVASER_PCIEFD_KCAN_MODE_RM; iowrite32(mode, can->reg_base + KVASER_PCIEFD_KCAN_MODE_REG); @@ -476,11 +475,10 @@ static int kvaser_pciefd_bus_on(struct kvaser_pciefd_can *can) } /* Reset interrupt handling */ iowrite32(0, can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG); - iowrite32(-1, can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG); + iowrite32(GENMASK(31, 0), can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG); kvaser_pciefd_set_tx_irq(can); kvaser_pciefd_setup_controller(can); - can->can.state = CAN_STATE_ERROR_ACTIVE; netif_wake_queue(can->can.dev); can->bec.txerr = 0; @@ -499,7 +497,6 @@ static void kvaser_pciefd_pwm_stop(struct kvaser_pciefd_can *can) spin_lock_irqsave(&can->lock, irq); pwm_ctrl = ioread32(can->reg_base + KVASER_PCIEFD_KCAN_PWM_REG); top = FIELD_GET(KVASER_PCIEFD_KCAN_PWM_TOP_MASK, pwm_ctrl); - /* Set duty cycle to zero */ pwm_ctrl |= FIELD_PREP(KVASER_PCIEFD_KCAN_PWM_TRIGGER_MASK, top); iowrite32(pwm_ctrl, can->reg_base + KVASER_PCIEFD_KCAN_PWM_REG); @@ -514,8 +511,7 @@ static void kvaser_pciefd_pwm_start(struct kvaser_pciefd_can *can) kvaser_pciefd_pwm_stop(can); spin_lock_irqsave(&can->lock, irq); - - /* Set frequency to 500 KHz*/ + /* Set frequency to 500 KHz */ top = can->kv_pcie->bus_freq / (2 * 500000) - 1; pwm_ctrl = FIELD_PREP(KVASER_PCIEFD_KCAN_PWM_TRIGGER_MASK, top); @@ -580,7 +576,6 @@ static int kvaser_pciefd_prepare_tx_packet(struct kvaser_pciefd_tx_packet *p, int seq = can->echo_idx; memset(p, 0, sizeof(*p)); - if (can->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT) p->header[1] |= KVASER_PCIEFD_TPACKET_SMS; @@ -621,16 +616,15 @@ static netdev_tx_t kvaser_pciefd_start_xmit(struct sk_buff *skb, struct kvaser_pciefd_can *can = netdev_priv(netdev); unsigned long irq_flags; struct kvaser_pciefd_tx_packet packet; - int nwords; + int nr_words; u8 count; if (can_dev_dropped_skb(netdev, skb)) return NETDEV_TX_OK; - nwords = kvaser_pciefd_prepare_tx_packet(&packet, can, skb); + nr_words = kvaser_pciefd_prepare_tx_packet(&packet, can, skb); spin_lock_irqsave(&can->echo_lock, irq_flags); - /* Prepare and save echo skb in internal slot */ can_put_echo_skb(skb, netdev, can->echo_idx, 0); @@ -643,13 +637,13 @@ static netdev_tx_t kvaser_pciefd_start_xmit(struct sk_buff *skb, iowrite32(packet.header[1], can->reg_base + KVASER_PCIEFD_KCAN_FIFO_REG); - if (nwords) { - u32 data_last = ((u32 *)packet.data)[nwords - 1]; + if (nr_words) { + u32 data_last = ((u32 *)packet.data)[nr_words - 1]; /* Write data to fifo, except last word */ iowrite32_rep(can->reg_base + KVASER_PCIEFD_KCAN_FIFO_REG, packet.data, - nwords - 1); + nr_words - 1); /* Write last word to end of fifo */ __raw_writel(data_last, can->reg_base + KVASER_PCIEFD_KCAN_FIFO_LAST_REG); @@ -660,14 +654,13 @@ static netdev_tx_t kvaser_pciefd_start_xmit(struct sk_buff *skb, } count = FIELD_GET(KVASER_PCIEFD_KCAN_TX_NR_PACKETS_CURRENT_MASK, - ioread32(can->reg_base + KVASER_PCIEFD_KCAN_TX_NPACKETS_REG)); + ioread32(can->reg_base + KVASER_PCIEFD_KCAN_TX_NR_PACKETS_REG)); /* No room for a new message, stop the queue until at least one * successful transmit */ if (count >= KVASER_PCIEFD_CAN_TX_MAX_COUNT || can->can.echo_skb[can->echo_idx]) netif_stop_queue(netdev); - spin_unlock_irqrestore(&can->echo_lock, irq_flags); return NETDEV_TX_OK; @@ -692,16 +685,13 @@ static int kvaser_pciefd_set_bittiming(struct kvaser_pciefd_can *can, bool data) spin_lock_irqsave(&can->lock, irq_flags); mode = ioread32(can->reg_base + KVASER_PCIEFD_KCAN_MODE_REG); - /* Put the circuit in reset mode */ iowrite32(mode | KVASER_PCIEFD_KCAN_MODE_RM, can->reg_base + KVASER_PCIEFD_KCAN_MODE_REG); /* Can only set bittiming if in reset mode */ ret = readl_poll_timeout(can->reg_base + KVASER_PCIEFD_KCAN_MODE_REG, - test, test & KVASER_PCIEFD_KCAN_MODE_RM, - 0, 10); - + test, test & KVASER_PCIEFD_KCAN_MODE_RM, 0, 10); if (ret) { spin_unlock_irqrestore(&can->lock, irq_flags); return -EBUSY; @@ -711,11 +701,10 @@ static int kvaser_pciefd_set_bittiming(struct kvaser_pciefd_can *can, bool data) iowrite32(btrn, can->reg_base + KVASER_PCIEFD_KCAN_BTRD_REG); else iowrite32(btrn, can->reg_base + KVASER_PCIEFD_KCAN_BTRN_REG); - /* Restore previous reset mode status */ iowrite32(mode, can->reg_base + KVASER_PCIEFD_KCAN_MODE_REG); - spin_unlock_irqrestore(&can->lock, irq_flags); + return 0; } @@ -753,6 +742,7 @@ static int kvaser_pciefd_get_berr_counter(const struct net_device *ndev, bec->rxerr = can->bec.rxerr; bec->txerr = can->bec.txerr; + return 0; } @@ -796,7 +786,6 @@ static int kvaser_pciefd_setup_can_ctrls(struct kvaser_pciefd *pcie) netdev->ethtool_ops = &kvaser_pciefd_ethtool_ops; can->reg_base = pcie->reg_base + KVASER_PCIEFD_KCAN0_BASE + i * KVASER_PCIEFD_KCAN_BASE_OFFSET; - can->kv_pcie = pcie; can->cmd_seq = 0; can->err_rep_cnt = 0; @@ -805,15 +794,14 @@ static int kvaser_pciefd_setup_can_ctrls(struct kvaser_pciefd *pcie) init_completion(&can->start_comp); init_completion(&can->flush_comp); - timer_setup(&can->bec_poll_timer, kvaser_pciefd_bec_poll_timer, - 0); + timer_setup(&can->bec_poll_timer, kvaser_pciefd_bec_poll_timer, 0); /* Disable Bus load reporting */ iowrite32(0, can->reg_base + KVASER_PCIEFD_KCAN_BUS_LOAD_REG); tx_nr_packets_max = FIELD_GET(KVASER_PCIEFD_KCAN_TX_NR_PACKETS_MAX_MASK, - ioread32(can->reg_base + KVASER_PCIEFD_KCAN_TX_NPACKETS_REG)); + ioread32(can->reg_base + KVASER_PCIEFD_KCAN_TX_NR_PACKETS_REG)); if (tx_nr_packets_max < KVASER_PCIEFD_CAN_TX_MAX_COUNT) { dev_err(&pcie->pci->dev, "Max Tx count is smaller than expected\n"); @@ -827,16 +815,13 @@ static int kvaser_pciefd_setup_can_ctrls(struct kvaser_pciefd *pcie) can->echo_idx = 0; spin_lock_init(&can->echo_lock); spin_lock_init(&can->lock); + can->can.bittiming_const = &kvaser_pciefd_bittiming_const; can->can.data_bittiming_const = &kvaser_pciefd_bittiming_const; - can->can.do_set_bittiming = kvaser_pciefd_set_nominal_bittiming; - can->can.do_set_data_bittiming = - kvaser_pciefd_set_data_bittiming; - + can->can.do_set_data_bittiming = kvaser_pciefd_set_data_bittiming; can->can.do_set_mode = kvaser_pciefd_set_mode; can->can.do_get_berr_counter = kvaser_pciefd_get_berr_counter; - can->can.ctrlmode_supported = CAN_CTRLMODE_LISTENONLY | CAN_CTRLMODE_FD | CAN_CTRLMODE_FD_NON_ISO | @@ -855,10 +840,9 @@ static int kvaser_pciefd_setup_can_ctrls(struct kvaser_pciefd *pcie) can->can.ctrlmode_supported |= CAN_CTRLMODE_ONE_SHOT; netdev->flags |= IFF_ECHO; - SET_NETDEV_DEV(netdev, &pcie->pci->dev); - iowrite32(-1, can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG); + iowrite32(GENMASK(31, 0), can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG); iowrite32(KVASER_PCIEFD_KCAN_IRQ_ABD, can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG); @@ -917,18 +901,16 @@ static int kvaser_pciefd_setup_dma(struct kvaser_pciefd *pcie) for (i = 0; i < KVASER_PCIEFD_DMA_COUNT; i++) { unsigned int offset = KVASER_PCIEFD_DMA_MAP_BASE + 8 * i; - pcie->dma_data[i] = - dmam_alloc_coherent(&pcie->pci->dev, - KVASER_PCIEFD_DMA_SIZE, - &dma_addr[i], - GFP_KERNEL); + pcie->dma_data[i] = dmam_alloc_coherent(&pcie->pci->dev, + KVASER_PCIEFD_DMA_SIZE, + &dma_addr[i], + GFP_KERNEL); if (!pcie->dma_data[i] || !dma_addr[i]) { dev_err(&pcie->pci->dev, "Rx dma_alloc(%u) failure\n", KVASER_PCIEFD_DMA_SIZE); return -ENOMEM; } - kvaser_pciefd_write_dma_map(pcie, dma_addr[i], offset); } @@ -936,7 +918,6 @@ static int kvaser_pciefd_setup_dma(struct kvaser_pciefd *pcie) iowrite32(KVASER_PCIEFD_SRB_CMD_FOR | KVASER_PCIEFD_SRB_CMD_RDB0 | KVASER_PCIEFD_SRB_CMD_RDB1, pcie->reg_base + KVASER_PCIEFD_SRB_CMD_REG); - /* Empty Rx FIFO */ srb_packet_count = FIELD_GET(KVASER_PCIEFD_SRB_RX_NR_PACKETS_MASK, @@ -976,8 +957,7 @@ static int kvaser_pciefd_setup_board(struct kvaser_pciefd *pcie) srb_status = ioread32(pcie->reg_base + KVASER_PCIEFD_SRB_STAT_REG); if (!(srb_status & KVASER_PCIEFD_SRB_STAT_DMA)) { - dev_err(&pcie->pci->dev, - "Hardware without DMA is not supported\n"); + dev_err(&pcie->pci->dev, "Hardware without DMA is not supported\n"); return -ENODEV; } @@ -987,9 +967,9 @@ static int kvaser_pciefd_setup_board(struct kvaser_pciefd *pcie) pcie->freq_to_ticks_div = pcie->freq / 1000000; if (pcie->freq_to_ticks_div == 0) pcie->freq_to_ticks_div = 1; - /* Turn off all loopback functionality */ iowrite32(0, pcie->reg_base + KVASER_PCIEFD_LOOP_REG); + return 0; } @@ -1000,7 +980,6 @@ static int kvaser_pciefd_handle_data_packet(struct kvaser_pciefd *pcie, struct sk_buff *skb; struct canfd_frame *cf; struct can_priv *priv; - struct net_device_stats *stats; u8 ch_id = FIELD_GET(KVASER_PCIEFD_PACKET_CHID_MASK, p->header[1]); u8 dlc; @@ -1008,26 +987,24 @@ static int kvaser_pciefd_handle_data_packet(struct kvaser_pciefd *pcie, return -EIO; priv = &pcie->can[ch_id]->can; - stats = &priv->dev->stats; dlc = FIELD_GET(KVASER_PCIEFD_RPACKET_DLC_MASK, p->header[1]); if (p->header[1] & KVASER_PCIEFD_RPACKET_FDF) { skb = alloc_canfd_skb(priv->dev, &cf); if (!skb) { - stats->rx_dropped++; + priv->dev->stats.rx_dropped++; return -ENOMEM; } cf->len = can_fd_dlc2len(dlc); if (p->header[1] & KVASER_PCIEFD_RPACKET_BRS) cf->flags |= CANFD_BRS; - if (p->header[1] & KVASER_PCIEFD_RPACKET_ESI) cf->flags |= CANFD_ESI; } else { skb = alloc_can_skb(priv->dev, (struct can_frame **)&cf); if (!skb) { - stats->rx_dropped++; + priv->dev->stats.rx_dropped++; return -ENOMEM; } can_frame_set_cc_len((struct can_frame *)cf, dlc, priv->ctrlmode); @@ -1041,10 +1018,9 @@ static int kvaser_pciefd_handle_data_packet(struct kvaser_pciefd *pcie, cf->can_id |= CAN_RTR_FLAG; } else { memcpy(cf->data, data, cf->len); - - stats->rx_bytes += cf->len; + priv->dev->stats.rx_bytes += cf->len; } - stats->rx_packets++; + priv->dev->stats.rx_packets++; kvaser_pciefd_set_skb_timestamp(pcie, skb, p->timestamp); return netif_rx(skb); @@ -1065,7 +1041,6 @@ static void kvaser_pciefd_change_state(struct kvaser_pciefd_can *can, spin_lock_irqsave(&can->lock, irq_flags); netif_stop_queue(can->can.dev); spin_unlock_irqrestore(&can->lock, irq_flags); - /* Prevent CAN controller from auto recover from bus off */ if (!can->can.restart_ms) { kvaser_pciefd_start_controller_flush(can); @@ -1083,7 +1058,7 @@ static void kvaser_pciefd_packet_to_state(struct kvaser_pciefd_rx_packet *p, if (p->header[0] & KVASER_PCIEFD_SPACK_BOFF || p->header[0] & KVASER_PCIEFD_SPACK_IRM) *new_state = CAN_STATE_BUS_OFF; - else if (bec->txerr >= 255 || bec->rxerr >= 255) + else if (bec->txerr >= 255 || bec->rxerr >= 255) *new_state = CAN_STATE_BUS_OFF; else if (p->header[1] & KVASER_PCIEFD_SPACK_EPLR) *new_state = CAN_STATE_ERROR_PASSIVE; @@ -1108,22 +1083,16 @@ static int kvaser_pciefd_rx_error_frame(struct kvaser_pciefd_can *can, struct net_device *ndev = can->can.dev; struct sk_buff *skb; struct can_frame *cf = NULL; - struct net_device_stats *stats = &ndev->stats; old_state = can->can.state; bec.txerr = FIELD_GET(KVASER_PCIEFD_SPACK_TXERR_MASK, p->header[0]); bec.rxerr = FIELD_GET(KVASER_PCIEFD_SPACK_RXERR_MASK, p->header[0]); - kvaser_pciefd_packet_to_state(p, &bec, &new_state, &tx_state, - &rx_state); - + kvaser_pciefd_packet_to_state(p, &bec, &new_state, &tx_state, &rx_state); skb = alloc_can_err_skb(ndev, &cf); - if (new_state != old_state) { - kvaser_pciefd_change_state(can, cf, new_state, tx_state, - rx_state); - + kvaser_pciefd_change_state(can, cf, new_state, tx_state, rx_state); if (old_state == CAN_STATE_BUS_OFF && new_state == CAN_STATE_ERROR_ACTIVE && can->can.restart_ms) { @@ -1136,25 +1105,25 @@ static int kvaser_pciefd_rx_error_frame(struct kvaser_pciefd_can *can, can->err_rep_cnt++; can->can.can_stats.bus_error++; if (p->header[1] & KVASER_PCIEFD_EPACK_DIR_TX) - stats->tx_errors++; + ndev->stats.tx_errors++; else - stats->rx_errors++; + ndev->stats.rx_errors++; can->bec.txerr = bec.txerr; can->bec.rxerr = bec.rxerr; if (!skb) { - stats->rx_dropped++; + ndev->stats.rx_dropped++; return -ENOMEM; } kvaser_pciefd_set_skb_timestamp(can->kv_pcie, skb, p->timestamp); cf->can_id |= CAN_ERR_BUSERROR | CAN_ERR_CNT; - cf->data[6] = bec.txerr; cf->data[7] = bec.rxerr; netif_rx(skb); + return 0; } @@ -1168,13 +1137,13 @@ static int kvaser_pciefd_handle_error_packet(struct kvaser_pciefd *pcie, return -EIO; can = pcie->can[ch_id]; - kvaser_pciefd_rx_error_frame(can, p); if (can->err_rep_cnt >= KVASER_PCIEFD_MAX_ERR_REP) /* Do not report more errors, until bec_poll_timer expires */ kvaser_pciefd_disable_err_gen(can); /* Start polling the error counters */ mod_timer(&can->bec_poll_timer, KVASER_PCIEFD_BEC_POLL_FREQ); + return 0; } @@ -1189,9 +1158,7 @@ static int kvaser_pciefd_handle_status_resp(struct kvaser_pciefd_can *can, bec.txerr = FIELD_GET(KVASER_PCIEFD_SPACK_TXERR_MASK, p->header[0]); bec.rxerr = FIELD_GET(KVASER_PCIEFD_SPACK_RXERR_MASK, p->header[0]); - kvaser_pciefd_packet_to_state(p, &bec, &new_state, &tx_state, - &rx_state); - + kvaser_pciefd_packet_to_state(p, &bec, &new_state, &tx_state, &rx_state); if (new_state != old_state) { struct net_device *ndev = can->can.dev; struct sk_buff *skb; @@ -1199,15 +1166,11 @@ static int kvaser_pciefd_handle_status_resp(struct kvaser_pciefd_can *can, skb = alloc_can_err_skb(ndev, &cf); if (!skb) { - struct net_device_stats *stats = &ndev->stats; - - stats->rx_dropped++; + ndev->stats.rx_dropped++; return -ENOMEM; } - kvaser_pciefd_change_state(can, cf, new_state, tx_state, - rx_state); - + kvaser_pciefd_change_state(can, cf, new_state, tx_state, rx_state); if (old_state == CAN_STATE_BUS_OFF && new_state == CAN_STATE_ERROR_ACTIVE && can->can.restart_ms) { @@ -1253,21 +1216,18 @@ static int kvaser_pciefd_handle_status_packet(struct kvaser_pciefd *pcie, p->header[1] & KVASER_PCIEFD_SPACK_AUTO && cmdseq == FIELD_GET(KVASER_PCIEFD_PACKET_SEQ_MASK, p->header[1]) && status & KVASER_PCIEFD_KCAN_STAT_IDLE) { - u32 cmd; - iowrite32(KVASER_PCIEFD_KCAN_IRQ_ABD, can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG); - cmd = KVASER_PCIEFD_KCAN_CMD_AT; - cmd |= FIELD_PREP(KVASER_PCIEFD_KCAN_CMD_SEQ_MASK, ++can->cmd_seq); - iowrite32(cmd, can->reg_base + KVASER_PCIEFD_KCAN_CMD_REG); + kvaser_pciefd_abort_flush_reset(can); } else if (p->header[0] & KVASER_PCIEFD_SPACK_IDET && p->header[0] & KVASER_PCIEFD_SPACK_IRM && cmdseq == FIELD_GET(KVASER_PCIEFD_PACKET_SEQ_MASK, p->header[1]) && status & KVASER_PCIEFD_KCAN_STAT_IDLE) { /* Reset detected, send end of flush if no packet are in FIFO */ - u8 count = FIELD_GET(KVASER_PCIEFD_KCAN_TX_NR_PACKETS_CURRENT_MASK, - ioread32(can->reg_base + KVASER_PCIEFD_KCAN_TX_NPACKETS_REG)); + u8 count; + count = FIELD_GET(KVASER_PCIEFD_KCAN_TX_NR_PACKETS_CURRENT_MASK, + ioread32(can->reg_base + KVASER_PCIEFD_KCAN_TX_NR_PACKETS_REG)); if (!count) iowrite32(FIELD_PREP(KVASER_PCIEFD_KCAN_CTRL_TYPE_MASK, KVASER_PCIEFD_KCAN_CTRL_TYPE_EFLUSH), @@ -1278,11 +1238,10 @@ static int kvaser_pciefd_handle_status_packet(struct kvaser_pciefd *pcie, kvaser_pciefd_handle_status_resp(can, p); if (can->can.state != CAN_STATE_BUS_OFF && can->can.state != CAN_STATE_ERROR_ACTIVE) { - mod_timer(&can->bec_poll_timer, - KVASER_PCIEFD_BEC_POLL_FREQ); + mod_timer(&can->bec_poll_timer, KVASER_PCIEFD_BEC_POLL_FREQ); } } else if (p->header[0] & KVASER_PCIEFD_SPACK_RMCD && - !(status & KVASER_PCIEFD_KCAN_STAT_BUS_OFF_MSK)) { + !(status & KVASER_PCIEFD_KCAN_STAT_BUS_OFF_MASK)) { /* Reset to bus on detected */ if (!completion_done(&can->start_comp)) complete(&can->start_comp); @@ -1295,12 +1254,10 @@ static void kvaser_pciefd_handle_nack_packet(struct kvaser_pciefd_can *can, struct kvaser_pciefd_rx_packet *p) { struct sk_buff *skb; - struct net_device_stats *stats = &can->can.dev->stats; struct can_frame *cf; skb = alloc_can_err_skb(can->can.dev, &cf); - - stats->tx_errors++; + can->can.dev->stats.tx_errors++; if (p->header[0] & KVASER_PCIEFD_APACKET_ABL) { if (skb) cf->can_id |= CAN_ERR_LOSTARB; @@ -1314,7 +1271,7 @@ static void kvaser_pciefd_handle_nack_packet(struct kvaser_pciefd_can *can, kvaser_pciefd_set_skb_timestamp(can->kv_pcie, skb, p->timestamp); netif_rx(skb); } else { - stats->rx_dropped++; + can->can.dev->stats.rx_dropped++; netdev_warn(can->can.dev, "No memory left for err_skb\n"); } } @@ -1343,26 +1300,24 @@ static int kvaser_pciefd_handle_ack_packet(struct kvaser_pciefd *pcie, netdev_dbg(can->can.dev, "Packet was flushed\n"); } else { int echo_idx = FIELD_GET(KVASER_PCIEFD_PACKET_SEQ_MASK, p->header[0]); - int dlc; + int len; u8 count; struct sk_buff *skb; skb = can->can.echo_skb[echo_idx]; if (skb) kvaser_pciefd_set_skb_timestamp(pcie, skb, p->timestamp); - dlc = can_get_echo_skb(can->can.dev, echo_idx, NULL); + len = can_get_echo_skb(can->can.dev, echo_idx, NULL); count = FIELD_GET(KVASER_PCIEFD_KCAN_TX_NR_PACKETS_CURRENT_MASK, - ioread32(can->reg_base + KVASER_PCIEFD_KCAN_TX_NPACKETS_REG)); + ioread32(can->reg_base + KVASER_PCIEFD_KCAN_TX_NR_PACKETS_REG)); if (count < KVASER_PCIEFD_CAN_TX_MAX_COUNT && netif_queue_stopped(can->can.dev)) netif_wake_queue(can->can.dev); if (!one_shot_fail) { - struct net_device_stats *stats = &can->can.dev->stats; - - stats->tx_bytes += dlc; - stats->tx_packets++; + can->can.dev->stats.tx_bytes += len; + can->can.dev->stats.tx_packets++; } } @@ -1562,13 +1517,12 @@ static irqreturn_t kvaser_pciefd_irq_handler(int irq, void *dev) static void kvaser_pciefd_teardown_can_ctrls(struct kvaser_pciefd *pcie) { int i; - struct kvaser_pciefd_can *can; for (i = 0; i < pcie->nr_channels; i++) { - can = pcie->can[i]; + struct kvaser_pciefd_can *can = pcie->can[i]; + if (can) { - iowrite32(0, - can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG); + iowrite32(0, can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG); kvaser_pciefd_pwm_stop(can); free_candev(can->can.dev); } @@ -1669,14 +1623,13 @@ static int kvaser_pciefd_probe(struct pci_dev *pdev, static void kvaser_pciefd_remove_all_ctrls(struct kvaser_pciefd *pcie) { - struct kvaser_pciefd_can *can; int i; for (i = 0; i < pcie->nr_channels; i++) { - can = pcie->can[i]; + struct kvaser_pciefd_can *can = pcie->can[i]; + if (can) { - iowrite32(0, - can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG); + iowrite32(0, can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG); unregister_candev(can->can.dev); del_timer(&can->bec_poll_timer); kvaser_pciefd_pwm_stop(can); -- 2.40.1
