drivers/scsi/qedf/drv_fcoe_fw_funcs.c

   1 /* QLogic FCoE Offload Driver
   2  * Copyright (c) 2016-2017 Cavium Inc.
   3  *
   4  * This software is available under the terms of the GNU General Public License
   5  * (GPL) Version 2, available from the file COPYING in the main directory of
   6  * this source tree.
   7  */
   8 #include "drv_fcoe_fw_funcs.h"
   9 #include "drv_scsi_fw_funcs.h"
  10
  11 #define FCOE_RX_ID (0xFFFFu)
  12
  13 static inline void init_common_sqe(struct fcoe_task_params *task_params,
  14                                    enum fcoe_sqe_request_type request_type)
  15 {
  16         memset(task_params->sqe, 0, sizeof(*(task_params->sqe)));
  17         SET_FIELD(task_params->sqe->flags, FCOE_WQE_REQ_TYPE,
  18                   request_type);
  19         task_params->sqe->task_id = task_params->itid;
  20 }
  21
  22 int init_initiator_rw_fcoe_task(struct fcoe_task_params *task_params,
  23                                 struct scsi_sgl_task_params *sgl_task_params,
  24                                 struct regpair sense_data_buffer_phys_addr,
  25                                 u32 task_retry_id,
  26                                 u8 fcp_cmd_payload[32])
  27 {
  28         struct e4_fcoe_task_context *ctx = task_params->context;
  29         const u8 val_byte = ctx->ystorm_ag_context.byte0;
  30         struct e4_ustorm_fcoe_task_ag_ctx *u_ag_ctx;
  31         struct ystorm_fcoe_task_st_ctx *y_st_ctx;
  32         struct tstorm_fcoe_task_st_ctx *t_st_ctx;
  33         struct mstorm_fcoe_task_st_ctx *m_st_ctx;
  34         u32 io_size, val;
  35         bool slow_sgl;
  36
  37         memset(ctx, 0, sizeof(*(ctx)));
  38         ctx->ystorm_ag_context.byte0 = val_byte;
  39         slow_sgl = scsi_is_slow_sgl(sgl_task_params->num_sges,
  40                                     sgl_task_params->small_mid_sge);
  41         io_size = (task_params->task_type == FCOE_TASK_TYPE_WRITE_INITIATOR ?
  42                    task_params->tx_io_size : task_params->rx_io_size);
  43
  44         /* Ystorm ctx */
  45         y_st_ctx = &ctx->ystorm_st_context;
  46         y_st_ctx->data_2_trns_rem = cpu_to_le32(io_size);
  47         y_st_ctx->task_rety_identifier = cpu_to_le32(task_retry_id);
  48         y_st_ctx->task_type = (u8)task_params->task_type;
  49         memcpy(&y_st_ctx->tx_info_union.fcp_cmd_payload,
  50                fcp_cmd_payload, sizeof(struct fcoe_fcp_cmd_payload));
  51
  52         /* Tstorm ctx */
  53         t_st_ctx = &ctx->tstorm_st_context;
  54         t_st_ctx->read_only.dev_type = (u8)(task_params->is_tape_device == 1 ?
  55                                             FCOE_TASK_DEV_TYPE_TAPE :
  56                                             FCOE_TASK_DEV_TYPE_DISK);
  57         t_st_ctx->read_only.cid = cpu_to_le32(task_params->conn_cid);
  58         val = cpu_to_le32(task_params->cq_rss_number);
  59         t_st_ctx->read_only.glbl_q_num = val;
  60         t_st_ctx->read_only.fcp_cmd_trns_size = cpu_to_le32(io_size);
  61         t_st_ctx->read_only.task_type = (u8)task_params->task_type;
  62         SET_FIELD(t_st_ctx->read_write.flags,
  63                   FCOE_TSTORM_FCOE_TASK_ST_CTX_READ_WRITE_EXP_FIRST_FRAME, 1);
  64         t_st_ctx->read_write.rx_id = cpu_to_le16(FCOE_RX_ID);
  65
  66         /* Ustorm ctx */
  67         u_ag_ctx = &ctx->ustorm_ag_context;
  68         u_ag_ctx->global_cq_num = cpu_to_le32(task_params->cq_rss_number);
  69
  70         /* Mstorm buffer for sense/rsp data placement */
  71         m_st_ctx = &ctx->mstorm_st_context;
  72         val = cpu_to_le32(sense_data_buffer_phys_addr.hi);
  73         m_st_ctx->rsp_buf_addr.hi = val;
  74         val = cpu_to_le32(sense_data_buffer_phys_addr.lo);
  75         m_st_ctx->rsp_buf_addr.lo = val;
  76
  77         if (task_params->task_type == FCOE_TASK_TYPE_WRITE_INITIATOR) {
  78                 /* Ystorm ctx */
  79                 y_st_ctx->expect_first_xfer = 1;
  80
  81                 /* Set the amount of super SGEs. Can be up to 4. */
  82                 SET_FIELD(y_st_ctx->sgl_mode,
  83                           YSTORM_FCOE_TASK_ST_CTX_TX_SGL_MODE,
  84                           (slow_sgl ? SCSI_TX_SLOW_SGL : SCSI_FAST_SGL));
  85                 init_scsi_sgl_context(&y_st_ctx->sgl_params,
  86                                       &y_st_ctx->data_desc,
  87                                       sgl_task_params);
  88
  89                 /* Mstorm ctx */
  90                 SET_FIELD(m_st_ctx->flags,
  91                           MSTORM_FCOE_TASK_ST_CTX_TX_SGL_MODE,
  92                           (slow_sgl ? SCSI_TX_SLOW_SGL : SCSI_FAST_SGL));
  93                 m_st_ctx->sgl_params.sgl_num_sges =
  94                         cpu_to_le16(sgl_task_params->num_sges);
  95         } else {
  96                 /* Tstorm ctx */
  97                 SET_FIELD(t_st_ctx->read_write.flags,
  98                           FCOE_TSTORM_FCOE_TASK_ST_CTX_READ_WRITE_RX_SGL_MODE,
  99                           (slow_sgl ? SCSI_TX_SLOW_SGL : SCSI_FAST_SGL));
 100
 101                 /* Mstorm ctx */
 102                 m_st_ctx->data_2_trns_rem = cpu_to_le32(io_size);
 103                 init_scsi_sgl_context(&m_st_ctx->sgl_params,
 104                                       &m_st_ctx->data_desc,
 105                                       sgl_task_params);
 106         }
 107
 108         /* Init Sqe */
 109         init_common_sqe(task_params, SEND_FCOE_CMD);
 110
 111         return 0;
 112 }
 113
 114 int init_initiator_midpath_unsolicited_fcoe_task(
 115         struct fcoe_task_params *task_params,
 116         struct fcoe_tx_mid_path_params *mid_path_fc_header,
 117         struct scsi_sgl_task_params *tx_sgl_task_params,
 118         struct scsi_sgl_task_params *rx_sgl_task_params,
 119         u8 fw_to_place_fc_header)
 120 {
 121         struct e4_fcoe_task_context *ctx = task_params->context;
 122         const u8 val_byte = ctx->ystorm_ag_context.byte0;
 123         struct e4_ustorm_fcoe_task_ag_ctx *u_ag_ctx;
 124         struct ystorm_fcoe_task_st_ctx *y_st_ctx;
 125         struct tstorm_fcoe_task_st_ctx *t_st_ctx;
 126         struct mstorm_fcoe_task_st_ctx *m_st_ctx;
 127         u32 val;
 128
 129         memset(ctx, 0, sizeof(*(ctx)));
 130         ctx->ystorm_ag_context.byte0 = val_byte;
 131
 132         /* Init Ystorm */
 133         y_st_ctx = &ctx->ystorm_st_context;
 134         init_scsi_sgl_context(&y_st_ctx->sgl_params,
 135                               &y_st_ctx->data_desc,
 136                               tx_sgl_task_params);
 137         SET_FIELD(y_st_ctx->sgl_mode,
 138                   YSTORM_FCOE_TASK_ST_CTX_TX_SGL_MODE, SCSI_FAST_SGL);
 139         y_st_ctx->data_2_trns_rem = cpu_to_le32(task_params->tx_io_size);
 140         y_st_ctx->task_type = (u8)task_params->task_type;
 141         memcpy(&y_st_ctx->tx_info_union.tx_params.mid_path,
 142                mid_path_fc_header, sizeof(struct fcoe_tx_mid_path_params));
 143
 144         /* Init Mstorm */
 145         m_st_ctx = &ctx->mstorm_st_context;
 146         init_scsi_sgl_context(&m_st_ctx->sgl_params,
 147                               &m_st_ctx->data_desc,
 148                               rx_sgl_task_params);
 149         SET_FIELD(m_st_ctx->flags,
 150                   MSTORM_FCOE_TASK_ST_CTX_MP_INCLUDE_FC_HEADER,
 151                   fw_to_place_fc_header);
 152         m_st_ctx->data_2_trns_rem = cpu_to_le32(task_params->rx_io_size);
 153
 154         /* Init Tstorm */
 155         t_st_ctx = &ctx->tstorm_st_context;
 156         t_st_ctx->read_only.cid = cpu_to_le32(task_params->conn_cid);
 157         val = cpu_to_le32(task_params->cq_rss_number);
 158         t_st_ctx->read_only.glbl_q_num = val;
 159         t_st_ctx->read_only.task_type = (u8)task_params->task_type;
 160         SET_FIELD(t_st_ctx->read_write.flags,
 161                   FCOE_TSTORM_FCOE_TASK_ST_CTX_READ_WRITE_EXP_FIRST_FRAME, 1);
 162         t_st_ctx->read_write.rx_id = cpu_to_le16(FCOE_RX_ID);
 163
 164         /* Init Ustorm */
 165         u_ag_ctx = &ctx->ustorm_ag_context;
 166         u_ag_ctx->global_cq_num = cpu_to_le32(task_params->cq_rss_number);
 167
 168         /* Init SQE */
 169         init_common_sqe(task_params, SEND_FCOE_MIDPATH);
 170         task_params->sqe->additional_info_union.burst_length =
 171                                     tx_sgl_task_params->total_buffer_size;
 172         SET_FIELD(task_params->sqe->flags,
 173                   FCOE_WQE_NUM_SGES, tx_sgl_task_params->num_sges);
 174         SET_FIELD(task_params->sqe->flags, FCOE_WQE_SGL_MODE,
 175                   SCSI_FAST_SGL);
 176
 177         return 0;
 178 }
 179
 180 int init_initiator_abort_fcoe_task(struct fcoe_task_params *task_params)
 181 {
 182         init_common_sqe(task_params, SEND_FCOE_ABTS_REQUEST);
 183         return 0;
 184 }
 185
 186 int init_initiator_cleanup_fcoe_task(struct fcoe_task_params *task_params)
 187 {
 188         init_common_sqe(task_params, FCOE_EXCHANGE_CLEANUP);
 189         return 0;
 190 }
 191
 192 int init_initiator_sequence_recovery_fcoe_task(
 193         struct fcoe_task_params *task_params, u32 desired_offset)
 194 {
 195         init_common_sqe(task_params, FCOE_SEQUENCE_RECOVERY);
 196         task_params->sqe->additional_info_union.seq_rec_updated_offset =
 197                                                                 desired_offset;
 198         return 0;
 199 }