drivers/scsi/qedf/drv_fcoe_fw_funcs.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /* QLogic FCoE Offload Driver
   3  * Copyright (c) 2016-2018 Cavium Inc.
   4  */
   5 #include "drv_fcoe_fw_funcs.h"
   6 #include "drv_scsi_fw_funcs.h"
   7
   8 #define FCOE_RX_ID (0xFFFFu)
   9
  10 static inline void init_common_sqe(struct fcoe_task_params *task_params,
  11                                    enum fcoe_sqe_request_type request_type)
  12 {
  13         memset(task_params->sqe, 0, sizeof(*(task_params->sqe)));
  14         SET_FIELD(task_params->sqe->flags, FCOE_WQE_REQ_TYPE,
  15                   request_type);
  16         task_params->sqe->task_id = task_params->itid;
  17 }
  18
  19 int init_initiator_rw_fcoe_task(struct fcoe_task_params *task_params,
  20                                 struct scsi_sgl_task_params *sgl_task_params,
  21                                 struct regpair sense_data_buffer_phys_addr,
  22                                 u32 task_retry_id,
  23                                 u8 fcp_cmd_payload[32])
  24 {
  25         struct fcoe_task_context *ctx = task_params->context;
  26         const u8 val_byte = ctx->ystorm_ag_context.byte0;
  27         struct ustorm_fcoe_task_ag_ctx *u_ag_ctx;
  28         struct ystorm_fcoe_task_st_ctx *y_st_ctx;
  29         struct tstorm_fcoe_task_st_ctx *t_st_ctx;
  30         struct mstorm_fcoe_task_st_ctx *m_st_ctx;
  31         u32 io_size, val;
  32         bool slow_sgl;
  33
  34         memset(ctx, 0, sizeof(*(ctx)));
  35         ctx->ystorm_ag_context.byte0 = val_byte;
  36         slow_sgl = scsi_is_slow_sgl(sgl_task_params->num_sges,
  37                                     sgl_task_params->small_mid_sge);
  38         io_size = (task_params->task_type == FCOE_TASK_TYPE_WRITE_INITIATOR ?
  39                    task_params->tx_io_size : task_params->rx_io_size);
  40
  41         /* Ystorm ctx */
  42         y_st_ctx = &ctx->ystorm_st_context;
  43         y_st_ctx->data_2_trns_rem = cpu_to_le32(io_size);
  44         y_st_ctx->task_rety_identifier = cpu_to_le32(task_retry_id);
  45         y_st_ctx->task_type = (u8)task_params->task_type;
  46         memcpy(&y_st_ctx->tx_info_union.fcp_cmd_payload,
  47                fcp_cmd_payload, sizeof(struct fcoe_fcp_cmd_payload));
  48
  49         /* Tstorm ctx */
  50         t_st_ctx = &ctx->tstorm_st_context;
  51         t_st_ctx->read_only.dev_type = (u8)(task_params->is_tape_device == 1 ?
  52                                             FCOE_TASK_DEV_TYPE_TAPE :
  53                                             FCOE_TASK_DEV_TYPE_DISK);
  54         t_st_ctx->read_only.cid = cpu_to_le32(task_params->conn_cid);
  55         val = cpu_to_le32(task_params->cq_rss_number);
  56         t_st_ctx->read_only.glbl_q_num = val;
  57         t_st_ctx->read_only.fcp_cmd_trns_size = cpu_to_le32(io_size);
  58         t_st_ctx->read_only.task_type = (u8)task_params->task_type;
  59         SET_FIELD(t_st_ctx->read_write.flags,
  60                   FCOE_TSTORM_FCOE_TASK_ST_CTX_READ_WRITE_EXP_FIRST_FRAME, 1);
  61         t_st_ctx->read_write.rx_id = cpu_to_le16(FCOE_RX_ID);
  62
  63         /* Ustorm ctx */
  64         u_ag_ctx = &ctx->ustorm_ag_context;
  65         u_ag_ctx->global_cq_num = cpu_to_le32(task_params->cq_rss_number);
  66
  67         /* Mstorm buffer for sense/rsp data placement */
  68         m_st_ctx = &ctx->mstorm_st_context;
  69         val = cpu_to_le32(sense_data_buffer_phys_addr.hi);
  70         m_st_ctx->rsp_buf_addr.hi = val;
  71         val = cpu_to_le32(sense_data_buffer_phys_addr.lo);
  72         m_st_ctx->rsp_buf_addr.lo = val;
  73
  74         if (task_params->task_type == FCOE_TASK_TYPE_WRITE_INITIATOR) {
  75                 /* Ystorm ctx */
  76                 y_st_ctx->expect_first_xfer = 1;
  77
  78                 /* Set the amount of super SGEs. Can be up to 4. */
  79                 SET_FIELD(y_st_ctx->sgl_mode,
  80                           YSTORM_FCOE_TASK_ST_CTX_TX_SGL_MODE,
  81                           (slow_sgl ? SCSI_TX_SLOW_SGL : SCSI_FAST_SGL));
  82                 init_scsi_sgl_context(&y_st_ctx->sgl_params,
  83                                       &y_st_ctx->data_desc,
  84                                       sgl_task_params);
  85
  86                 /* Mstorm ctx */
  87                 SET_FIELD(m_st_ctx->flags,
  88                           MSTORM_FCOE_TASK_ST_CTX_TX_SGL_MODE,
  89                           (slow_sgl ? SCSI_TX_SLOW_SGL : SCSI_FAST_SGL));
  90                 m_st_ctx->sgl_params.sgl_num_sges =
  91                         cpu_to_le16(sgl_task_params->num_sges);
  92         } else {
  93                 /* Tstorm ctx */
  94                 SET_FIELD(t_st_ctx->read_write.flags,
  95                           FCOE_TSTORM_FCOE_TASK_ST_CTX_READ_WRITE_RX_SGL_MODE,
  96                           (slow_sgl ? SCSI_TX_SLOW_SGL : SCSI_FAST_SGL));
  97
  98                 /* Mstorm ctx */
  99                 m_st_ctx->data_2_trns_rem = cpu_to_le32(io_size);
 100                 init_scsi_sgl_context(&m_st_ctx->sgl_params,
 101                                       &m_st_ctx->data_desc,
 102                                       sgl_task_params);
 103         }
 104
 105         /* Init Sqe */
 106         init_common_sqe(task_params, SEND_FCOE_CMD);
 107
 108         return 0;
 109 }
 110
 111 int init_initiator_midpath_unsolicited_fcoe_task(
 112         struct fcoe_task_params *task_params,
 113         struct fcoe_tx_mid_path_params *mid_path_fc_header,
 114         struct scsi_sgl_task_params *tx_sgl_task_params,
 115         struct scsi_sgl_task_params *rx_sgl_task_params,
 116         u8 fw_to_place_fc_header)
 117 {
 118         struct fcoe_task_context *ctx = task_params->context;
 119         const u8 val_byte = ctx->ystorm_ag_context.byte0;
 120         struct ustorm_fcoe_task_ag_ctx *u_ag_ctx;
 121         struct ystorm_fcoe_task_st_ctx *y_st_ctx;
 122         struct tstorm_fcoe_task_st_ctx *t_st_ctx;
 123         struct mstorm_fcoe_task_st_ctx *m_st_ctx;
 124         u32 val;
 125
 126         memset(ctx, 0, sizeof(*(ctx)));
 127         ctx->ystorm_ag_context.byte0 = val_byte;
 128
 129         /* Init Ystorm */
 130         y_st_ctx = &ctx->ystorm_st_context;
 131         init_scsi_sgl_context(&y_st_ctx->sgl_params,
 132                               &y_st_ctx->data_desc,
 133                               tx_sgl_task_params);
 134         SET_FIELD(y_st_ctx->sgl_mode,
 135                   YSTORM_FCOE_TASK_ST_CTX_TX_SGL_MODE, SCSI_FAST_SGL);
 136         y_st_ctx->data_2_trns_rem = cpu_to_le32(task_params->tx_io_size);
 137         y_st_ctx->task_type = (u8)task_params->task_type;
 138         memcpy(&y_st_ctx->tx_info_union.tx_params.mid_path,
 139                mid_path_fc_header, sizeof(struct fcoe_tx_mid_path_params));
 140
 141         /* Init Mstorm */
 142         m_st_ctx = &ctx->mstorm_st_context;
 143         init_scsi_sgl_context(&m_st_ctx->sgl_params,
 144                               &m_st_ctx->data_desc,
 145                               rx_sgl_task_params);
 146         SET_FIELD(m_st_ctx->flags,
 147                   MSTORM_FCOE_TASK_ST_CTX_MP_INCLUDE_FC_HEADER,
 148                   fw_to_place_fc_header);
 149         m_st_ctx->data_2_trns_rem = cpu_to_le32(task_params->rx_io_size);
 150
 151         /* Init Tstorm */
 152         t_st_ctx = &ctx->tstorm_st_context;
 153         t_st_ctx->read_only.cid = cpu_to_le32(task_params->conn_cid);
 154         val = cpu_to_le32(task_params->cq_rss_number);
 155         t_st_ctx->read_only.glbl_q_num = val;
 156         t_st_ctx->read_only.task_type = (u8)task_params->task_type;
 157         SET_FIELD(t_st_ctx->read_write.flags,
 158                   FCOE_TSTORM_FCOE_TASK_ST_CTX_READ_WRITE_EXP_FIRST_FRAME, 1);
 159         t_st_ctx->read_write.rx_id = cpu_to_le16(FCOE_RX_ID);
 160
 161         /* Init Ustorm */
 162         u_ag_ctx = &ctx->ustorm_ag_context;
 163         u_ag_ctx->global_cq_num = cpu_to_le32(task_params->cq_rss_number);
 164
 165         /* Init SQE */
 166         init_common_sqe(task_params, SEND_FCOE_MIDPATH);
 167         task_params->sqe->additional_info_union.burst_length =
 168                                     tx_sgl_task_params->total_buffer_size;
 169         SET_FIELD(task_params->sqe->flags,
 170                   FCOE_WQE_NUM_SGES, tx_sgl_task_params->num_sges);
 171         SET_FIELD(task_params->sqe->flags, FCOE_WQE_SGL_MODE,
 172                   SCSI_FAST_SGL);
 173
 174         return 0;
 175 }
 176
 177 int init_initiator_abort_fcoe_task(struct fcoe_task_params *task_params)
 178 {
 179         init_common_sqe(task_params, SEND_FCOE_ABTS_REQUEST);
 180         return 0;
 181 }
 182
 183 int init_initiator_cleanup_fcoe_task(struct fcoe_task_params *task_params)
 184 {
 185         init_common_sqe(task_params, FCOE_EXCHANGE_CLEANUP);
 186         return 0;
 187 }
 188
 189 int init_initiator_sequence_recovery_fcoe_task(
 190         struct fcoe_task_params *task_params, u32 desired_offset)
 191 {
 192         init_common_sqe(task_params, FCOE_SEQUENCE_RECOVERY);
 193         task_params->sqe->additional_info_union.seq_rec_updated_offset =
 194                                                                 desired_offset;
 195         return 0;
 196 }