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_wed_setup(struct mt76_dev *dev, struct mt76_queue *q, bool reset); 83 void mt76_dma_wed_reset(struct mt76_dev *dev); 84 85 static inline void 86 mt76_dma_reset_tx_queue(struct mt76_dev *dev, struct mt76_queue *q) 87 { 88 dev->queue_ops->reset_q(dev, q); 89 if (mtk_wed_device_active(&dev->mmio.wed)) 90 mt76_dma_wed_setup(dev, q, true); 91 } 92 93 static inline void 94 mt76_dma_should_drop_buf(bool *drop, u32 ctrl, u32 buf1, u32 info) 95 { 96 if (!drop) 97 return; 98 99 *drop = !!(ctrl & (MT_DMA_CTL_TO_HOST_A | MT_DMA_CTL_DROP)); 100 if (!(ctrl & MT_DMA_CTL_VER_MASK)) 101 return; 102 103 switch (FIELD_GET(MT_DMA_WED_IND_REASON, buf1)) { 104 case MT_DMA_WED_IND_REASON_REPEAT: 105 *drop = true; 106 break; 107 case MT_DMA_WED_IND_REASON_OLDPKT: 108 *drop = !(info & MT_DMA_INFO_DMA_FRAG); 109 break; 110 default: 111 *drop = !!(ctrl & MT_DMA_CTL_PN_CHK_FAIL); 112 break; 113 } 114 } 115 116 #endif 117