drivers/net/wireless/mediatek/mt76/dma.h

   1 /* SPDX-License-Identifier: ISC */
   2 /*
   3  * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
   4  */
   5 #ifndef __MT76_DMA_H
   6 #define __MT76_DMA_H
   7
   8 #define DMA_DUMMY_DATA                  ((void *)~0)
   9
  10 #define MT_RING_SIZE                    0x10
  11
  12 #define MT_DMA_CTL_SD_LEN1              GENMASK(13, 0)
  13 #define MT_DMA_CTL_LAST_SEC1            BIT(14)
  14 #define MT_DMA_CTL_BURST                BIT(15)
  15 #define MT_DMA_CTL_SD_LEN0              GENMASK(29, 16)
  16 #define MT_DMA_CTL_LAST_SEC0            BIT(30)
  17 #define MT_DMA_CTL_DMA_DONE             BIT(31)
  18 #define MT_DMA_CTL_TO_HOST              BIT(8)
  19 #define MT_DMA_CTL_TO_HOST_A            BIT(12)
  20 #define MT_DMA_CTL_DROP                 BIT(14)
  21 #define MT_DMA_CTL_TOKEN                GENMASK(31, 16)
  22 #define MT_DMA_CTL_SDP1_H               GENMASK(19, 16)
  23 #define MT_DMA_CTL_SDP0_H               GENMASK(3, 0)
  24 #define MT_DMA_CTL_WO_DROP              BIT(8)
  25
  26 #define MT_DMA_PPE_CPU_REASON           GENMASK(15, 11)
  27 #define MT_DMA_PPE_ENTRY                GENMASK(30, 16)
  28 #define MT_DMA_INFO_DMA_FRAG            BIT(9)
  29 #define MT_DMA_INFO_PPE_VLD             BIT(31)
  30
  31 #define MT_DMA_CTL_PN_CHK_FAIL          BIT(13)
  32 #define MT_DMA_CTL_VER_MASK             BIT(7)
  33
  34 #define MT_DMA_RRO_EN           BIT(13)
  35
  36 #define MT_DMA_WED_IND_CMD_CNT          8
  37 #define MT_DMA_WED_IND_REASON           GENMASK(15, 12)
  38
  39 #define MT_DMA_HDR_LEN                  4
  40 #define MT_RX_INFO_LEN                  4
  41 #define MT_FCE_INFO_LEN                 4
  42 #define MT_RX_RXWI_LEN                  32
  43
  44 struct mt76_desc {
  45         __le32 buf0;
  46         __le32 ctrl;
  47         __le32 buf1;
  48         __le32 info;
  49 } __packed __aligned(4);
  50
  51 struct mt76_wed_rro_desc {
  52         __le32 buf0;
  53         __le32 buf1;
  54 } __packed __aligned(4);
  55
  56 enum mt76_qsel {
  57         MT_QSEL_MGMT,
  58         MT_QSEL_HCCA,
  59         MT_QSEL_EDCA,
  60         MT_QSEL_EDCA_2,
  61 };
  62
  63 enum mt76_mcu_evt_type {
  64         EVT_CMD_DONE,
  65         EVT_CMD_ERROR,
  66         EVT_CMD_RETRY,
  67         EVT_EVENT_PWR_RSP,
  68         EVT_EVENT_WOW_RSP,
  69         EVT_EVENT_CARRIER_DETECT_RSP,
  70         EVT_EVENT_DFS_DETECT_RSP,
  71 };
  72
  73 enum mt76_dma_wed_ind_reason {
  74         MT_DMA_WED_IND_REASON_NORMAL,
  75         MT_DMA_WED_IND_REASON_REPEAT,
  76         MT_DMA_WED_IND_REASON_OLDPKT,
  77 };
  78
  79 int mt76_dma_rx_poll(struct napi_struct *napi, int budget);
  80 void mt76_dma_attach(struct mt76_dev *dev);
  81 void mt76_dma_cleanup(struct mt76_dev *dev);
  82 int mt76_dma_rx_fill(struct mt76_dev *dev, struct mt76_queue *q,
  83                      bool allow_direct);
  84 void __mt76_dma_queue_reset(struct mt76_dev *dev, struct mt76_queue *q,
  85                             bool reset_idx);
  86 void mt76_dma_queue_reset(struct mt76_dev *dev, struct mt76_queue *q);
  87
  88 static inline void
  89 mt76_dma_reset_tx_queue(struct mt76_dev *dev, struct mt76_queue *q)
  90 {
  91         dev->queue_ops->reset_q(dev, q);
  92         if (mtk_wed_device_active(&dev->mmio.wed))
  93                 mt76_wed_dma_setup(dev, q, true);
  94 }
  95
  96 static inline void
  97 mt76_dma_should_drop_buf(bool *drop, u32 ctrl, u32 buf1, u32 info)
  98 {
  99         if (!drop)
 100                 return;
 101
 102         *drop = !!(ctrl & (MT_DMA_CTL_TO_HOST_A | MT_DMA_CTL_DROP));
 103         if (!(ctrl & MT_DMA_CTL_VER_MASK))
 104                 return;
 105
 106         switch (FIELD_GET(MT_DMA_WED_IND_REASON, buf1)) {
 107         case MT_DMA_WED_IND_REASON_REPEAT:
 108                 *drop = true;
 109                 break;
 110         case MT_DMA_WED_IND_REASON_OLDPKT:
 111                 *drop = !(info & MT_DMA_INFO_DMA_FRAG);
 112                 break;
 113         default:
 114                 *drop = !!(ctrl & MT_DMA_CTL_PN_CHK_FAIL);
 115                 break;
 116         }
 117 }
 118
 119 static inline void *mt76_priv(struct net_device *dev)
 120 {
 121         struct mt76_dev **priv;
 122
 123         priv = netdev_priv(dev);
 124
 125         return *priv;
 126 }
 127
 128 #endif