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 129