1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2019 Texas Instruments Incorporated - https://www.ti.com 4 */ 5 6 #ifndef K3_UDMA_GLUE_H_ 7 #define K3_UDMA_GLUE_H_ 8 9 #include <linux/types.h> 10 #include <linux/soc/ti/k3-ringacc.h> 11 #include <linux/dma/ti-cppi5.h> 12 13 struct k3_udma_glue_tx_channel_cfg { 14 struct k3_ring_cfg tx_cfg; 15 struct k3_ring_cfg txcq_cfg; 16 17 bool tx_pause_on_err; 18 bool tx_filt_einfo; 19 bool tx_filt_pswords; 20 bool tx_supr_tdpkt; 21 u32 swdata_size; 22 }; 23 24 struct k3_udma_glue_tx_channel; 25 26 struct k3_udma_glue_tx_channel *k3_udma_glue_request_tx_chn(struct device *dev, 27 const char *name, struct k3_udma_glue_tx_channel_cfg *cfg); 28 29 void k3_udma_glue_release_tx_chn(struct k3_udma_glue_tx_channel *tx_chn); 30 int k3_udma_glue_push_tx_chn(struct k3_udma_glue_tx_channel *tx_chn, 31 struct cppi5_host_desc_t *desc_tx, 32 dma_addr_t desc_dma); 33 int k3_udma_glue_pop_tx_chn(struct k3_udma_glue_tx_channel *tx_chn, 34 dma_addr_t *desc_dma); 35 int k3_udma_glue_enable_tx_chn(struct k3_udma_glue_tx_channel *tx_chn); 36 void k3_udma_glue_disable_tx_chn(struct k3_udma_glue_tx_channel *tx_chn); 37 void k3_udma_glue_tdown_tx_chn(struct k3_udma_glue_tx_channel *tx_chn, 38 bool sync); 39 void k3_udma_glue_reset_tx_chn(struct k3_udma_glue_tx_channel *tx_chn, 40 void *data, void (*cleanup)(void *data, dma_addr_t desc_dma)); 41 u32 k3_udma_glue_tx_get_hdesc_size(struct k3_udma_glue_tx_channel *tx_chn); 42 u32 k3_udma_glue_tx_get_txcq_id(struct k3_udma_glue_tx_channel *tx_chn); 43 int k3_udma_glue_tx_get_irq(struct k3_udma_glue_tx_channel *tx_chn); 44 struct device * 45 k3_udma_glue_tx_get_dma_device(struct k3_udma_glue_tx_channel *tx_chn); 46 void k3_udma_glue_tx_dma_to_cppi5_addr(struct k3_udma_glue_tx_channel *tx_chn, 47 dma_addr_t *addr); 48 void k3_udma_glue_tx_cppi5_to_dma_addr(struct k3_udma_glue_tx_channel *tx_chn, 49 dma_addr_t *addr); 50 51 enum { 52 K3_UDMA_GLUE_SRC_TAG_LO_KEEP = 0, 53 K3_UDMA_GLUE_SRC_TAG_LO_USE_FLOW_REG = 1, 54 K3_UDMA_GLUE_SRC_TAG_LO_USE_REMOTE_FLOW_ID = 2, 55 K3_UDMA_GLUE_SRC_TAG_LO_USE_REMOTE_SRC_TAG = 4, 56 }; 57 58 /** 59 * k3_udma_glue_rx_flow_cfg - UDMA RX flow cfg 60 * 61 * @rx_cfg: RX ring configuration 62 * @rxfdq_cfg: RX free Host PD ring configuration 63 * @ring_rxq_id: RX ring id (or -1 for any) 64 * @ring_rxfdq0_id: RX free Host PD ring (FDQ) if (or -1 for any) 65 * @rx_error_handling: Rx Error Handling Mode (0 - drop, 1 - re-try) 66 * @src_tag_lo_sel: Rx Source Tag Low Byte Selector in Host PD 67 */ 68 struct k3_udma_glue_rx_flow_cfg { 69 struct k3_ring_cfg rx_cfg; 70 struct k3_ring_cfg rxfdq_cfg; 71 int ring_rxq_id; 72 int ring_rxfdq0_id; 73 bool rx_error_handling; 74 int src_tag_lo_sel; 75 }; 76 77 /** 78 * k3_udma_glue_rx_channel_cfg - UDMA RX channel cfg 79 * 80 * @psdata_size: SW Data is present in Host PD of @swdata_size bytes 81 * @flow_id_base: first flow_id used by channel. 82 * if @flow_id_base = -1 - range of GP rflows will be 83 * allocated dynamically. 84 * @flow_id_num: number of RX flows used by channel 85 * @flow_id_use_rxchan_id: use RX channel id as flow id, 86 * used only if @flow_id_num = 1 87 * @remote indication that RX channel is remote - some remote CPU 88 * core owns and control the RX channel. Linux Host only 89 * allowed to attach and configure RX Flow within RX 90 * channel. if set - not RX channel operation will be 91 * performed by K3 NAVSS DMA glue interface. 92 * @def_flow_cfg default RX flow configuration, 93 * used only if @flow_id_num = 1 94 */ 95 struct k3_udma_glue_rx_channel_cfg { 96 u32 swdata_size; 97 int flow_id_base; 98 int flow_id_num; 99 bool flow_id_use_rxchan_id; 100 bool remote; 101 102 struct k3_udma_glue_rx_flow_cfg *def_flow_cfg; 103 }; 104 105 struct k3_udma_glue_rx_channel; 106 107 struct k3_udma_glue_rx_channel *k3_udma_glue_request_rx_chn( 108 struct device *dev, 109 const char *name, 110 struct k3_udma_glue_rx_channel_cfg *cfg); 111 112 void k3_udma_glue_release_rx_chn(struct k3_udma_glue_rx_channel *rx_chn); 113 int k3_udma_glue_enable_rx_chn(struct k3_udma_glue_rx_channel *rx_chn); 114 void k3_udma_glue_disable_rx_chn(struct k3_udma_glue_rx_channel *rx_chn); 115 void k3_udma_glue_tdown_rx_chn(struct k3_udma_glue_rx_channel *rx_chn, 116 bool sync); 117 int k3_udma_glue_push_rx_chn(struct k3_udma_glue_rx_channel *rx_chn, 118 u32 flow_num, struct cppi5_host_desc_t *desc_tx, 119 dma_addr_t desc_dma); 120 int k3_udma_glue_pop_rx_chn(struct k3_udma_glue_rx_channel *rx_chn, 121 u32 flow_num, dma_addr_t *desc_dma); 122 int k3_udma_glue_rx_flow_init(struct k3_udma_glue_rx_channel *rx_chn, 123 u32 flow_idx, struct k3_udma_glue_rx_flow_cfg *flow_cfg); 124 u32 k3_udma_glue_rx_flow_get_fdq_id(struct k3_udma_glue_rx_channel *rx_chn, 125 u32 flow_idx); 126 u32 k3_udma_glue_rx_get_flow_id_base(struct k3_udma_glue_rx_channel *rx_chn); 127 int k3_udma_glue_rx_get_irq(struct k3_udma_glue_rx_channel *rx_chn, 128 u32 flow_num); 129 void k3_udma_glue_rx_put_irq(struct k3_udma_glue_rx_channel *rx_chn, 130 u32 flow_num); 131 void k3_udma_glue_reset_rx_chn(struct k3_udma_glue_rx_channel *rx_chn, 132 u32 flow_num, void *data, 133 void (*cleanup)(void *data, dma_addr_t desc_dma), 134 bool skip_fdq); 135 int k3_udma_glue_rx_flow_enable(struct k3_udma_glue_rx_channel *rx_chn, 136 u32 flow_idx); 137 int k3_udma_glue_rx_flow_disable(struct k3_udma_glue_rx_channel *rx_chn, 138 u32 flow_idx); 139 struct device * 140 k3_udma_glue_rx_get_dma_device(struct k3_udma_glue_rx_channel *rx_chn); 141 void k3_udma_glue_rx_dma_to_cppi5_addr(struct k3_udma_glue_rx_channel *rx_chn, 142 dma_addr_t *addr); 143 void k3_udma_glue_rx_cppi5_to_dma_addr(struct k3_udma_glue_rx_channel *rx_chn, 144 dma_addr_t *addr); 145 146 #endif /* K3_UDMA_GLUE_H_ */ 147