/* QLogic FCoE Offload Driver
 * Copyright (c) 2016-2017 Cavium Inc.
 *
 * This software is available under the terms of the GNU General Public License
 * (GPL) Version 2, available from the file COPYING in the main directory of
 * this source tree.
 */
#include "drv_fcoe_fw_funcs.h"
#include "drv_scsi_fw_funcs.h"

#define FCOE_RX_ID (0xFFFFu)

static inline void init_common_sqe(struct fcoe_task_params *task_params,
                                   enum fcoe_sqe_request_type request_type)
{
        memset(task_params->sqe, 0, sizeof(*(task_params->sqe)));
        SET_FIELD(task_params->sqe->flags, FCOE_WQE_REQ_TYPE,
                  request_type);
        task_params->sqe->task_id = task_params->itid;
}

int init_initiator_rw_fcoe_task(struct fcoe_task_params *task_params,
                                struct scsi_sgl_task_params *sgl_task_params,
                                struct regpair sense_data_buffer_phys_addr,
                                u32 task_retry_id,
                                u8 fcp_cmd_payload[32])
{
        struct fcoe_task_context *ctx = task_params->context;
        struct ystorm_fcoe_task_st_ctx *y_st_ctx;
        struct tstorm_fcoe_task_st_ctx *t_st_ctx;
        struct ustorm_fcoe_task_ag_ctx *u_ag_ctx;
        struct mstorm_fcoe_task_st_ctx *m_st_ctx;
        u32 io_size, val;
        bool slow_sgl;

        memset(ctx, 0, sizeof(*(ctx)));
        slow_sgl = scsi_is_slow_sgl(sgl_task_params->num_sges,
                                    sgl_task_params->small_mid_sge);
        io_size = (task_params->task_type == FCOE_TASK_TYPE_WRITE_INITIATOR ?
                   task_params->tx_io_size : task_params->rx_io_size);

        /* Ystorm ctx */
        y_st_ctx = &ctx->ystorm_st_context;
        y_st_ctx->data_2_trns_rem = cpu_to_le32(io_size);
        y_st_ctx->task_rety_identifier = cpu_to_le32(task_retry_id);
        y_st_ctx->task_type = task_params->task_type;
        memcpy(&y_st_ctx->tx_info_union.fcp_cmd_payload,
               fcp_cmd_payload, sizeof(struct fcoe_fcp_cmd_payload));

        /* Tstorm ctx */
        t_st_ctx = &ctx->tstorm_st_context;
        t_st_ctx->read_only.dev_type = (task_params->is_tape_device == 1 ?
                                        FCOE_TASK_DEV_TYPE_TAPE :
                                        FCOE_TASK_DEV_TYPE_DISK);
        t_st_ctx->read_only.cid = cpu_to_le32(task_params->conn_cid);
        val = cpu_to_le32(task_params->cq_rss_number);
        t_st_ctx->read_only.glbl_q_num = val;
        t_st_ctx->read_only.fcp_cmd_trns_size = cpu_to_le32(io_size);
        t_st_ctx->read_only.task_type = task_params->task_type;
        SET_FIELD(t_st_ctx->read_write.flags,
                  FCOE_TSTORM_FCOE_TASK_ST_CTX_READ_WRITE_EXP_FIRST_FRAME, 1);
        t_st_ctx->read_write.rx_id = cpu_to_le16(FCOE_RX_ID);

        /* Ustorm ctx */
        u_ag_ctx = &ctx->ustorm_ag_context;
        u_ag_ctx->global_cq_num = cpu_to_le32(task_params->cq_rss_number);

        /* Mstorm buffer for sense/rsp data placement */
        m_st_ctx = &ctx->mstorm_st_context;
        val = cpu_to_le32(sense_data_buffer_phys_addr.hi);
        m_st_ctx->rsp_buf_addr.hi = val;
        val = cpu_to_le32(sense_data_buffer_phys_addr.lo);
        m_st_ctx->rsp_buf_addr.lo = val;

        if (task_params->task_type == FCOE_TASK_TYPE_WRITE_INITIATOR) {
                /* Ystorm ctx */
                y_st_ctx->expect_first_xfer = 1;

                /* Set the amount of super SGEs. Can be up to 4. */
                SET_FIELD(y_st_ctx->sgl_mode,
                          YSTORM_FCOE_TASK_ST_CTX_TX_SGL_MODE,
                          (slow_sgl ? SCSI_TX_SLOW_SGL : SCSI_FAST_SGL));
                init_scsi_sgl_context(&y_st_ctx->sgl_params,
                                      &y_st_ctx->data_desc,
                                      sgl_task_params);

                /* Mstorm ctx */
                SET_FIELD(m_st_ctx->flags,
                          MSTORM_FCOE_TASK_ST_CTX_TX_SGL_MODE,
                          (slow_sgl ? SCSI_TX_SLOW_SGL : SCSI_FAST_SGL));
        } else {
                /* Tstorm ctx */
                SET_FIELD(t_st_ctx->read_write.flags,
                          FCOE_TSTORM_FCOE_TASK_ST_CTX_READ_WRITE_RX_SGL_MODE,
                          (slow_sgl ? SCSI_TX_SLOW_SGL : SCSI_FAST_SGL));

                /* Mstorm ctx */
                m_st_ctx->data_2_trns_rem = cpu_to_le32(io_size);
                init_scsi_sgl_context(&m_st_ctx->sgl_params,
                                      &m_st_ctx->data_desc,
                                      sgl_task_params);
        }

        init_common_sqe(task_params, SEND_FCOE_CMD);
        return 0;
}

int init_initiator_midpath_unsolicited_fcoe_task(
        struct fcoe_task_params *task_params,
        struct fcoe_tx_mid_path_params *mid_path_fc_header,
        struct scsi_sgl_task_params *tx_sgl_task_params,
        struct scsi_sgl_task_params *rx_sgl_task_params,
        u8 fw_to_place_fc_header)
{
        struct fcoe_task_context *ctx = task_params->context;
        struct ystorm_fcoe_task_st_ctx *y_st_ctx;
        struct tstorm_fcoe_task_st_ctx *t_st_ctx;
        struct ustorm_fcoe_task_ag_ctx *u_ag_ctx;
        struct mstorm_fcoe_task_st_ctx *m_st_ctx;
        u32 val;

        memset(ctx, 0, sizeof(*(ctx)));

        /* Init Ystorm */
        y_st_ctx = &ctx->ystorm_st_context;
        init_scsi_sgl_context(&y_st_ctx->sgl_params,
                              &y_st_ctx->data_desc,
                              tx_sgl_task_params);
        SET_FIELD(y_st_ctx->sgl_mode,
                  YSTORM_FCOE_TASK_ST_CTX_TX_SGL_MODE, SCSI_FAST_SGL);
        y_st_ctx->data_2_trns_rem = cpu_to_le32(task_params->tx_io_size);
        y_st_ctx->task_type = task_params->task_type;
        memcpy(&y_st_ctx->tx_info_union.tx_params.mid_path,
               mid_path_fc_header, sizeof(struct fcoe_tx_mid_path_params));

        /* Init Mstorm */
        m_st_ctx = &ctx->mstorm_st_context;
        init_scsi_sgl_context(&m_st_ctx->sgl_params,
                              &m_st_ctx->data_desc,
                              rx_sgl_task_params);
        SET_FIELD(m_st_ctx->flags,
                  MSTORM_FCOE_TASK_ST_CTX_MP_INCLUDE_FC_HEADER,
                  fw_to_place_fc_header);
        m_st_ctx->data_2_trns_rem = cpu_to_le32(task_params->rx_io_size);

        /* Init Tstorm */
        t_st_ctx = &ctx->tstorm_st_context;
        t_st_ctx->read_only.cid = cpu_to_le32(task_params->conn_cid);
        val = cpu_to_le32(task_params->cq_rss_number);
        t_st_ctx->read_only.glbl_q_num = val;
        t_st_ctx->read_only.task_type = task_params->task_type;
        SET_FIELD(t_st_ctx->read_write.flags,
                  FCOE_TSTORM_FCOE_TASK_ST_CTX_READ_WRITE_EXP_FIRST_FRAME, 1);
        t_st_ctx->read_write.rx_id = cpu_to_le16(FCOE_RX_ID);

        /* Init Ustorm */
        u_ag_ctx = &ctx->ustorm_ag_context;
        u_ag_ctx->global_cq_num = cpu_to_le32(task_params->cq_rss_number);

        /* Init SQE */
        init_common_sqe(task_params, SEND_FCOE_MIDPATH);
        task_params->sqe->additional_info_union.burst_length =
                                    tx_sgl_task_params->total_buffer_size;
        SET_FIELD(task_params->sqe->flags,
                  FCOE_WQE_NUM_SGES, tx_sgl_task_params->num_sges);
        SET_FIELD(task_params->sqe->flags, FCOE_WQE_SGL_MODE,
                  SCSI_FAST_SGL);

        return 0;
}

int init_initiator_abort_fcoe_task(struct fcoe_task_params *task_params)
{
        init_common_sqe(task_params, SEND_FCOE_ABTS_REQUEST);
        return 0;
}

int init_initiator_cleanup_fcoe_task(struct fcoe_task_params *task_params)
{
        init_common_sqe(task_params, FCOE_EXCHANGE_CLEANUP);
        return 0;
}

int init_initiator_sequence_recovery_fcoe_task(
        struct fcoe_task_params *task_params, u32 off)
{
        init_common_sqe(task_params, FCOE_SEQUENCE_RECOVERY);
        task_params->sqe->additional_info_union.seq_rec_updated_offset = off;
        return 0;
}