include/linux/dma/k3-udma-glue.h

   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
  45 enum {
  46         K3_UDMA_GLUE_SRC_TAG_LO_KEEP = 0,
  47         K3_UDMA_GLUE_SRC_TAG_LO_USE_FLOW_REG = 1,
  48         K3_UDMA_GLUE_SRC_TAG_LO_USE_REMOTE_FLOW_ID = 2,
  49         K3_UDMA_GLUE_SRC_TAG_LO_USE_REMOTE_SRC_TAG = 4,
  50 };
  51
  52 /**
  53  * k3_udma_glue_rx_flow_cfg - UDMA RX flow cfg
  54  *
  55  * @rx_cfg:             RX ring configuration
  56  * @rxfdq_cfg:          RX free Host PD ring configuration
  57  * @ring_rxq_id:        RX ring id (or -1 for any)
  58  * @ring_rxfdq0_id:     RX free Host PD ring (FDQ) if (or -1 for any)
  59  * @rx_error_handling:  Rx Error Handling Mode (0 - drop, 1 - re-try)
  60  * @src_tag_lo_sel:     Rx Source Tag Low Byte Selector in Host PD
  61  */
  62 struct k3_udma_glue_rx_flow_cfg {
  63         struct k3_ring_cfg rx_cfg;
  64         struct k3_ring_cfg rxfdq_cfg;
  65         int ring_rxq_id;
  66         int ring_rxfdq0_id;
  67         bool rx_error_handling;
  68         int src_tag_lo_sel;
  69 };
  70
  71 /**
  72  * k3_udma_glue_rx_channel_cfg - UDMA RX channel cfg
  73  *
  74  * @psdata_size:        SW Data is present in Host PD of @swdata_size bytes
  75  * @flow_id_base:       first flow_id used by channel.
  76  *                      if @flow_id_base = -1 - range of GP rflows will be
  77  *                      allocated dynamically.
  78  * @flow_id_num:        number of RX flows used by channel
  79  * @flow_id_use_rxchan_id:      use RX channel id as flow id,
  80  *                              used only if @flow_id_num = 1
  81  * @remote              indication that RX channel is remote - some remote CPU
  82  *                      core owns and control the RX channel. Linux Host only
  83  *                      allowed to attach and configure RX Flow within RX
  84  *                      channel. if set - not RX channel operation will be
  85  *                      performed by K3 NAVSS DMA glue interface.
  86  * @def_flow_cfg        default RX flow configuration,
  87  *                      used only if @flow_id_num = 1
  88  */
  89 struct k3_udma_glue_rx_channel_cfg {
  90         u32  swdata_size;
  91         int  flow_id_base;
  92         int  flow_id_num;
  93         bool flow_id_use_rxchan_id;
  94         bool remote;
  95
  96         struct k3_udma_glue_rx_flow_cfg *def_flow_cfg;
  97 };
  98
  99 struct k3_udma_glue_rx_channel;
 100
 101 struct k3_udma_glue_rx_channel *k3_udma_glue_request_rx_chn(
 102                 struct device *dev,
 103                 const char *name,
 104                 struct k3_udma_glue_rx_channel_cfg *cfg);
 105
 106 void k3_udma_glue_release_rx_chn(struct k3_udma_glue_rx_channel *rx_chn);
 107 int k3_udma_glue_enable_rx_chn(struct k3_udma_glue_rx_channel *rx_chn);
 108 void k3_udma_glue_disable_rx_chn(struct k3_udma_glue_rx_channel *rx_chn);
 109 void k3_udma_glue_tdown_rx_chn(struct k3_udma_glue_rx_channel *rx_chn,
 110                                bool sync);
 111 int k3_udma_glue_push_rx_chn(struct k3_udma_glue_rx_channel *rx_chn,
 112                 u32 flow_num, struct cppi5_host_desc_t *desc_tx,
 113                 dma_addr_t desc_dma);
 114 int k3_udma_glue_pop_rx_chn(struct k3_udma_glue_rx_channel *rx_chn,
 115                 u32 flow_num, dma_addr_t *desc_dma);
 116 int k3_udma_glue_rx_flow_init(struct k3_udma_glue_rx_channel *rx_chn,
 117                 u32 flow_idx, struct k3_udma_glue_rx_flow_cfg *flow_cfg);
 118 u32 k3_udma_glue_rx_flow_get_fdq_id(struct k3_udma_glue_rx_channel *rx_chn,
 119                                     u32 flow_idx);
 120 u32 k3_udma_glue_rx_get_flow_id_base(struct k3_udma_glue_rx_channel *rx_chn);
 121 int k3_udma_glue_rx_get_irq(struct k3_udma_glue_rx_channel *rx_chn,
 122                             u32 flow_num);
 123 void k3_udma_glue_rx_put_irq(struct k3_udma_glue_rx_channel *rx_chn,
 124                              u32 flow_num);
 125 void k3_udma_glue_reset_rx_chn(struct k3_udma_glue_rx_channel *rx_chn,
 126                 u32 flow_num, void *data,
 127                 void (*cleanup)(void *data, dma_addr_t desc_dma),
 128                 bool skip_fdq);
 129 int k3_udma_glue_rx_flow_enable(struct k3_udma_glue_rx_channel *rx_chn,
 130                                 u32 flow_idx);
 131 int k3_udma_glue_rx_flow_disable(struct k3_udma_glue_rx_channel *rx_chn,
 132                                  u32 flow_idx);
 133
 134 #endif /* K3_UDMA_GLUE_H_ */