target/linux/generic/backport-5.15/729-10-v6.2-net-ethernet-mtk_wed-return-status-value-in-mtk_wdma.patch

   1 From: Lorenzo Bianconi <lorenzo@kernel.org>
   2 Date: Thu, 24 Nov 2022 16:22:51 +0100
   3 Subject: [PATCH] net: ethernet: mtk_wed: return status value in
   4  mtk_wdma_rx_reset
   5
   6 Move MTK_WDMA_RESET_IDX configuration in mtk_wdma_rx_reset routine.
   7 Increase poll timeout to 10ms in order to be aligned with vendor sdk.
   8 This is a preliminary patch to add Wireless Ethernet Dispatcher reset
   9 support.
  10
  11 Co-developed-by: Sujuan Chen <sujuan.chen@mediatek.com>
  12 Signed-off-by: Sujuan Chen <sujuan.chen@mediatek.com>
  13 Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
  14 Signed-off-by: Paolo Abeni <pabeni@redhat.com>
  15 ---
  16
  17 --- a/drivers/net/ethernet/mediatek/mtk_wed.c
  18 +++ b/drivers/net/ethernet/mediatek/mtk_wed.c
  19 @@ -101,17 +101,21 @@ mtk_wdma_read_reset(struct mtk_wed_devic
  20         return wdma_r32(dev, MTK_WDMA_GLO_CFG);
  21  }
  22
  23 -static void
  24 +static int
  25  mtk_wdma_rx_reset(struct mtk_wed_device *dev)
  26  {
  27         u32 status, mask = MTK_WDMA_GLO_CFG_RX_DMA_BUSY;
  28 -       int i;
  29 +       int i, ret;
  30
  31         wdma_clr(dev, MTK_WDMA_GLO_CFG, MTK_WDMA_GLO_CFG_RX_DMA_EN);
  32 -       if (readx_poll_timeout(mtk_wdma_read_reset, dev, status,
  33 -                              !(status & mask), 0, 1000))
  34 +       ret = readx_poll_timeout(mtk_wdma_read_reset, dev, status,
  35 +                                !(status & mask), 0, 10000);
  36 +       if (ret)
  37                 dev_err(dev->hw->dev, "rx reset failed\n");
  38
  39 +       wdma_w32(dev, MTK_WDMA_RESET_IDX, MTK_WDMA_RESET_IDX_RX);
  40 +       wdma_w32(dev, MTK_WDMA_RESET_IDX, 0);
  41 +
  42         for (i = 0; i < ARRAY_SIZE(dev->rx_wdma); i++) {
  43                 if (dev->rx_wdma[i].desc)
  44                         continue;
  45 @@ -119,6 +123,8 @@ mtk_wdma_rx_reset(struct mtk_wed_device
  46                 wdma_w32(dev,
  47                          MTK_WDMA_RING_RX(i) + MTK_WED_RING_OFS_CPU_IDX, 0);
  48         }
  49 +
  50 +       return ret;
  51  }
  52
  53  static void
  54 @@ -565,9 +571,7 @@ mtk_wed_detach(struct mtk_wed_device *de
  55
  56         mtk_wed_stop(dev);
  57
  58 -       wdma_w32(dev, MTK_WDMA_RESET_IDX, MTK_WDMA_RESET_IDX_RX);
  59 -       wdma_w32(dev, MTK_WDMA_RESET_IDX, 0);
  60 -
  61 +       mtk_wdma_rx_reset(dev);
  62         mtk_wed_reset(dev, MTK_WED_RESET_WED);
  63         if (mtk_wed_get_rx_capa(dev)) {
  64                 wdma_clr(dev, MTK_WDMA_GLO_CFG, MTK_WDMA_GLO_CFG_TX_DMA_EN);
  65 @@ -582,7 +586,6 @@ mtk_wed_detach(struct mtk_wed_device *de
  66                 mtk_wed_wo_reset(dev);
  67                 mtk_wed_free_rx_rings(dev);
  68                 mtk_wed_wo_deinit(hw);
  69 -               mtk_wdma_rx_reset(dev);
  70         }
  71
  72         if (dev->wlan.bus_type == MTK_WED_BUS_PCIE) {
  73 @@ -999,11 +1002,7 @@ mtk_wed_reset_dma(struct mtk_wed_device
  74                 wed_w32(dev, MTK_WED_RESET_IDX, 0);
  75         }
  76
  77 -       wdma_w32(dev, MTK_WDMA_RESET_IDX, MTK_WDMA_RESET_IDX_RX);
  78 -       wdma_w32(dev, MTK_WDMA_RESET_IDX, 0);
  79 -
  80 -       if (mtk_wed_get_rx_capa(dev))
  81 -               mtk_wdma_rx_reset(dev);
  82 +       mtk_wdma_rx_reset(dev);
  83
  84         if (busy) {
  85                 mtk_wed_reset(dev, MTK_WED_RESET_WDMA_INT_AGENT);