target/linux/layerscape/patches-5.4/802-can-0018-can-flexcan-use-struct-canfd_frame-for-CAN-classic-f.patch

   1 From 03374d551c7fbb1b1ecc115df4f374bc5027b1f9 Mon Sep 17 00:00:00 2001
   2 From: Joakim Zhang <qiangqing.zhang@nxp.com>
   3 Date: Fri, 12 Jul 2019 08:02:41 +0000
   4 Subject: [PATCH] can: flexcan: use struct canfd_frame for CAN classic frame
   5
   6 This patch prepares for CAN FD mode, using struct canfd_frame can both
   7 for classic format frame and fd format frame.
   8
   9 Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
  10 Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
  11 ---
  12  drivers/net/can/flexcan.c    | 34 +++++++++++++++++-----------------
  13  drivers/net/can/rx-offload.c |  4 ++--
  14  2 files changed, 19 insertions(+), 19 deletions(-)
  15
  16 --- a/drivers/net/can/flexcan.c
  17 +++ b/drivers/net/can/flexcan.c
  18 @@ -629,10 +629,10 @@ static int flexcan_get_berr_counter(cons
  19  static netdev_tx_t flexcan_start_xmit(struct sk_buff *skb, struct net_device *dev)
  20  {
  21         const struct flexcan_priv *priv = netdev_priv(dev);
  22 -       struct can_frame *cf = (struct can_frame *)skb->data;
  23 +       struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
  24         u32 can_id;
  25         u32 data;
  26 -       u32 ctrl = FLEXCAN_MB_CODE_TX_DATA | (cf->can_dlc << 16);
  27 +       u32 ctrl = FLEXCAN_MB_CODE_TX_DATA | (cfd->len << 16);
  28         int i;
  29
  30         if (can_dropped_invalid_skb(dev, skb))
  31 @@ -640,18 +640,18 @@ static netdev_tx_t flexcan_start_xmit(st
  32
  33         netif_stop_queue(dev);
  34
  35 -       if (cf->can_id & CAN_EFF_FLAG) {
  36 -               can_id = cf->can_id & CAN_EFF_MASK;
  37 +       if (cfd->can_id & CAN_EFF_FLAG) {
  38 +               can_id = cfd->can_id & CAN_EFF_MASK;
  39                 ctrl |= FLEXCAN_MB_CNT_IDE | FLEXCAN_MB_CNT_SRR;
  40         } else {
  41 -               can_id = (cf->can_id & CAN_SFF_MASK) << 18;
  42 +               can_id = (cfd->can_id & CAN_SFF_MASK) << 18;
  43         }
  44
  45 -       if (cf->can_id & CAN_RTR_FLAG)
  46 +       if (cfd->can_id & CAN_RTR_FLAG)
  47                 ctrl |= FLEXCAN_MB_CNT_RTR;
  48
  49 -       for (i = 0; i < cf->can_dlc; i += sizeof(u32)) {
  50 -               data = be32_to_cpup((__be32 *)&cf->data[i]);
  51 +       for (i = 0; i < cfd->len; i += sizeof(u32)) {
  52 +               data = be32_to_cpup((__be32 *)&cfd->data[i]);
  53                 priv->write(data, &priv->tx_mb->data[i / sizeof(u32)]);
  54         }
  55
  56 @@ -823,7 +823,7 @@ static struct sk_buff *flexcan_mailbox_r
  57         struct flexcan_regs __iomem *regs = priv->regs;
  58         struct flexcan_mb __iomem *mb;
  59         struct sk_buff *skb;
  60 -       struct can_frame *cf;
  61 +       struct canfd_frame *cfd;
  62         u32 reg_ctrl, reg_id, reg_iflag1;
  63         int i;
  64
  65 @@ -860,8 +860,8 @@ static struct sk_buff *flexcan_mailbox_r
  66                 reg_ctrl = priv->read(&mb->can_ctrl);
  67         }
  68
  69 -       skb = alloc_can_skb(offload->dev, &cf);
  70 -       if (!skb) {
  71 +       skb = alloc_can_skb(offload->dev, (struct can_frame **)&cfd);
  72 +       if (unlikely(!skb)) {
  73                 skb = ERR_PTR(-ENOMEM);
  74                 goto mark_as_read;
  75         }
  76 @@ -871,17 +871,17 @@ static struct sk_buff *flexcan_mailbox_r
  77
  78         reg_id = priv->read(&mb->can_id);
  79         if (reg_ctrl & FLEXCAN_MB_CNT_IDE)
  80 -               cf->can_id = ((reg_id >> 0) & CAN_EFF_MASK) | CAN_EFF_FLAG;
  81 +               cfd->can_id = ((reg_id >> 0) & CAN_EFF_MASK) | CAN_EFF_FLAG;
  82         else
  83 -               cf->can_id = (reg_id >> 18) & CAN_SFF_MASK;
  84 +               cfd->can_id = (reg_id >> 18) & CAN_SFF_MASK;
  85
  86         if (reg_ctrl & FLEXCAN_MB_CNT_RTR)
  87 -               cf->can_id |= CAN_RTR_FLAG;
  88 -       cf->can_dlc = get_can_dlc((reg_ctrl >> 16) & 0xf);
  89 +               cfd->can_id |= CAN_RTR_FLAG;
  90 +       cfd->len = get_can_dlc((reg_ctrl >> 16) & 0xf);
  91
  92 -       for (i = 0; i < cf->can_dlc; i += sizeof(u32)) {
  93 +       for (i = 0; i < cfd->len; i += sizeof(u32)) {
  94                 __be32 data = cpu_to_be32(priv->read(&mb->data[i / sizeof(u32)]));
  95 -               *(__be32 *)(cf->data + i) = data;
  96 +               *(__be32 *)(cfd->data + i) = data;
  97         }
  98
  99   mark_as_read:
 100 --- a/drivers/net/can/rx-offload.c
 101 +++ b/drivers/net/can/rx-offload.c
 102 @@ -51,11 +51,11 @@ static int can_rx_offload_napi_poll(stru
 103
 104         while ((work_done < quota) &&
 105                (skb = skb_dequeue(&offload->skb_queue))) {
 106 -               struct can_frame *cf = (struct can_frame *)skb->data;
 107 +               struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
 108
 109                 work_done++;
 110                 stats->rx_packets++;
 111 -               stats->rx_bytes += cf->can_dlc;
 112 +               stats->rx_bytes += cfd->len;
 113                 netif_receive_skb(skb);
 114         }
 115