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linux/drivers/scsi/qedi/qedi_fw_api.c

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// SPDX-License-Identifier: GPL-2.0-only
/* QLogic iSCSI Offload Driver
* Copyright (c) 2016 Cavium Inc.
*/
#include <linux/types.h>
#include <asm/byteorder.h>
#include "qedi_hsi.h"
#include <linux/qed/qed_if.h>
#include "qedi_fw_iscsi.h"
#include "qedi_fw_scsi.h"
#define SCSI_NUM_SGES_IN_CACHE 0x4
static bool scsi_is_slow_sgl(u16 num_sges, bool small_mid_sge)
{
return (num_sges > SCSI_NUM_SGES_SLOW_SGL_THR && small_mid_sge);
}
static
void init_scsi_sgl_context(struct scsi_sgl_params *ctx_sgl_params,
struct scsi_cached_sges *ctx_data_desc,
struct scsi_sgl_task_params *sgl_task_params)
{
u8 sge_index;
u8 num_sges;
u32 val;
num_sges = (sgl_task_params->num_sges > SCSI_NUM_SGES_IN_CACHE) ?
SCSI_NUM_SGES_IN_CACHE : sgl_task_params->num_sges;
/* sgl params */
val = cpu_to_le32(sgl_task_params->sgl_phys_addr.lo);
ctx_sgl_params->sgl_addr.lo = val;
val = cpu_to_le32(sgl_task_params->sgl_phys_addr.hi);
ctx_sgl_params->sgl_addr.hi = val;
val = cpu_to_le32(sgl_task_params->total_buffer_size);
ctx_sgl_params->sgl_total_length = val;
ctx_sgl_params->sgl_num_sges = cpu_to_le16(sgl_task_params->num_sges);
for (sge_index = 0; sge_index < num_sges; sge_index++) {
val = cpu_to_le32(sgl_task_params->sgl[sge_index].sge_addr.lo);
ctx_data_desc->sge[sge_index].sge_addr.lo = val;
val = cpu_to_le32(sgl_task_params->sgl[sge_index].sge_addr.hi);
ctx_data_desc->sge[sge_index].sge_addr.hi = val;
val = cpu_to_le32(sgl_task_params->sgl[sge_index].sge_len);
ctx_data_desc->sge[sge_index].sge_len = val;
}
}
static u32 calc_rw_task_size(struct iscsi_task_params *task_params,
enum iscsi_task_type task_type,
struct scsi_sgl_task_params *sgl_task_params,
struct scsi_dif_task_params *dif_task_params)
{
u32 io_size;
if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE ||
task_type == ISCSI_TASK_TYPE_TARGET_READ)
io_size = task_params->tx_io_size;
else
io_size = task_params->rx_io_size;
if (!io_size)
return 0;
if (!dif_task_params)
return io_size;
return !dif_task_params->dif_on_network ?
io_size : sgl_task_params->total_buffer_size;
}
static void
init_dif_context_flags(struct iscsi_dif_flags *ctx_dif_flags,
struct scsi_dif_task_params *dif_task_params)
{
if (!dif_task_params)
return;
SET_FIELD(ctx_dif_flags->flags, ISCSI_DIF_FLAGS_PROT_INTERVAL_SIZE_LOG,
dif_task_params->dif_block_size_log);
SET_FIELD(ctx_dif_flags->flags, ISCSI_DIF_FLAGS_DIF_TO_PEER,
dif_task_params->dif_on_network ? 1 : 0);
SET_FIELD(ctx_dif_flags->flags, ISCSI_DIF_FLAGS_HOST_INTERFACE,
dif_task_params->dif_on_host ? 1 : 0);
}
static void init_sqe(struct iscsi_task_params *task_params,
struct scsi_sgl_task_params *sgl_task_params,
struct scsi_dif_task_params *dif_task_params,
struct iscsi_common_hdr *pdu_header,
struct scsi_initiator_cmd_params *cmd_params,
enum iscsi_task_type task_type,
bool is_cleanup)
{
if (!task_params->sqe)
return;
memset(task_params->sqe, 0, sizeof(*task_params->sqe));
task_params->sqe->task_id = cpu_to_le16(task_params->itid);
if (is_cleanup) {
SET_FIELD(task_params->sqe->flags, ISCSI_WQE_WQE_TYPE,
ISCSI_WQE_TYPE_TASK_CLEANUP);
return;
}
switch (task_type) {
case ISCSI_TASK_TYPE_INITIATOR_WRITE:
{
u32 buf_size = 0;
u32 num_sges = 0;
init_dif_context_flags(&task_params->sqe->prot_flags,
dif_task_params);
SET_FIELD(task_params->sqe->flags, ISCSI_WQE_WQE_TYPE,
ISCSI_WQE_TYPE_NORMAL);
if (task_params->tx_io_size) {
buf_size = calc_rw_task_size(task_params, task_type,
sgl_task_params,
dif_task_params);
if (scsi_is_slow_sgl(sgl_task_params->num_sges,
sgl_task_params->small_mid_sge))
num_sges = ISCSI_WQE_NUM_SGES_SLOWIO;
else
num_sges = min(sgl_task_params->num_sges,
(u16)SCSI_NUM_SGES_SLOW_SGL_THR);
}
SET_FIELD(task_params->sqe->flags, ISCSI_WQE_NUM_SGES,
num_sges);
SET_FIELD(task_params->sqe->contlen_cdbsize, ISCSI_WQE_CONT_LEN,
buf_size);
if (GET_FIELD(pdu_header->hdr_second_dword,
ISCSI_CMD_HDR_TOTAL_AHS_LEN))
SET_FIELD(task_params->sqe->contlen_cdbsize,
ISCSI_WQE_CDB_SIZE,
cmd_params->extended_cdb_sge.sge_len);
}
break;
case ISCSI_TASK_TYPE_INITIATOR_READ:
SET_FIELD(task_params->sqe->flags, ISCSI_WQE_WQE_TYPE,
ISCSI_WQE_TYPE_NORMAL);
if (GET_FIELD(pdu_header->hdr_second_dword,
ISCSI_CMD_HDR_TOTAL_AHS_LEN))
SET_FIELD(task_params->sqe->contlen_cdbsize,
ISCSI_WQE_CDB_SIZE,
cmd_params->extended_cdb_sge.sge_len);
break;
case ISCSI_TASK_TYPE_LOGIN_RESPONSE:
case ISCSI_TASK_TYPE_MIDPATH:
{
bool advance_statsn = true;
if (task_type == ISCSI_TASK_TYPE_LOGIN_RESPONSE)
SET_FIELD(task_params->sqe->flags, ISCSI_WQE_WQE_TYPE,
ISCSI_WQE_TYPE_LOGIN);
else
SET_FIELD(task_params->sqe->flags, ISCSI_WQE_WQE_TYPE,
ISCSI_WQE_TYPE_MIDDLE_PATH);
if (task_type == ISCSI_TASK_TYPE_MIDPATH) {
u8 opcode = GET_FIELD(pdu_header->hdr_first_byte,
ISCSI_COMMON_HDR_OPCODE);
if (opcode != ISCSI_OPCODE_TEXT_RESPONSE &&
(opcode != ISCSI_OPCODE_NOP_IN ||
pdu_header->itt == ISCSI_TTT_ALL_ONES))
advance_statsn = false;
}
SET_FIELD(task_params->sqe->flags, ISCSI_WQE_RESPONSE,
advance_statsn ? 1 : 0);
if (task_params->tx_io_size) {
SET_FIELD(task_params->sqe->contlen_cdbsize,
ISCSI_WQE_CONT_LEN, task_params->tx_io_size);
if (scsi_is_slow_sgl(sgl_task_params->num_sges,
sgl_task_params->small_mid_sge))
SET_FIELD(task_params->sqe->flags, ISCSI_WQE_NUM_SGES,
ISCSI_WQE_NUM_SGES_SLOWIO);
else
SET_FIELD(task_params->sqe->flags, ISCSI_WQE_NUM_SGES,
min(sgl_task_params->num_sges,
(u16)SCSI_NUM_SGES_SLOW_SGL_THR));
}
}
break;
default:
break;
}
}
static void init_default_iscsi_task(struct iscsi_task_params *task_params,
struct data_hdr *pdu_header,
enum iscsi_task_type task_type)
{
struct e4_iscsi_task_context *context;
u32 val;
u16 index;
u8 val_byte;
context = task_params->context;
val_byte = context->mstorm_ag_context.cdu_validation;
memset(context, 0, sizeof(*context));
context->mstorm_ag_context.cdu_validation = val_byte;
for (index = 0; index <
ARRAY_SIZE(context->ystorm_st_context.pdu_hdr.data.data);
index++) {
val = cpu_to_le32(pdu_header->data[index]);
context->ystorm_st_context.pdu_hdr.data.data[index] = val;
}
context->mstorm_st_context.task_type = task_type;
context->mstorm_ag_context.task_cid =
cpu_to_le16(task_params->conn_icid);
SET_FIELD(context->ustorm_ag_context.flags1,
E4_USTORM_ISCSI_TASK_AG_CTX_R2T2RECV, 1);
context->ustorm_st_context.task_type = task_type;
context->ustorm_st_context.cq_rss_number = task_params->cq_rss_number;
context->ustorm_ag_context.icid = cpu_to_le16(task_params->conn_icid);
}
static
void init_initiator_rw_cdb_ystorm_context(struct ystorm_iscsi_task_st_ctx *ystc,
struct scsi_initiator_cmd_params *cmd)
{
union iscsi_task_hdr *ctx_pdu_hdr = &ystc->pdu_hdr;
u32 val;
if (!cmd->extended_cdb_sge.sge_len)
return;
SET_FIELD(ctx_pdu_hdr->ext_cdb_cmd.hdr_second_dword,
ISCSI_EXT_CDB_CMD_HDR_CDB_SIZE,
cmd->extended_cdb_sge.sge_len);
val = cpu_to_le32(cmd->extended_cdb_sge.sge_addr.lo);
ctx_pdu_hdr->ext_cdb_cmd.cdb_sge.sge_addr.lo = val;
val = cpu_to_le32(cmd->extended_cdb_sge.sge_addr.hi);
ctx_pdu_hdr->ext_cdb_cmd.cdb_sge.sge_addr.hi = val;
val = cpu_to_le32(cmd->extended_cdb_sge.sge_len);
ctx_pdu_hdr->ext_cdb_cmd.cdb_sge.sge_len = val;
}
static
void init_ustorm_task_contexts(struct ustorm_iscsi_task_st_ctx *ustorm_st_cxt,
struct e4_ustorm_iscsi_task_ag_ctx *ustorm_ag_cxt,
u32 remaining_recv_len, u32 expected_data_transfer_len,
u8 num_sges, bool tx_dif_conn_err_en)
{
u32 val;
ustorm_st_cxt->rem_rcv_len = cpu_to_le32(remaining_recv_len);
ustorm_ag_cxt->exp_data_acked = cpu_to_le32(expected_data_transfer_len);
val = cpu_to_le32(expected_data_transfer_len);
ustorm_st_cxt->exp_data_transfer_len = val;
SET_FIELD(ustorm_st_cxt->reg1.reg1_map, ISCSI_REG1_NUM_SGES, num_sges);
SET_FIELD(ustorm_ag_cxt->flags2,
E4_USTORM_ISCSI_TASK_AG_CTX_DIF_ERROR_CF_EN,
tx_dif_conn_err_en ? 1 : 0);
}
static
void set_rw_exp_data_acked_and_cont_len(struct e4_iscsi_task_context *context,
struct iscsi_conn_params *conn_params,
enum iscsi_task_type task_type,
u32 task_size,
u32 exp_data_transfer_len,
u8 total_ahs_length)
{
u32 max_unsolicited_data = 0, val;
if (total_ahs_length &&
(task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE ||
task_type == ISCSI_TASK_TYPE_INITIATOR_READ))
SET_FIELD(context->ustorm_st_context.flags2,
USTORM_ISCSI_TASK_ST_CTX_AHS_EXIST, 1);
switch (task_type) {
case ISCSI_TASK_TYPE_INITIATOR_WRITE:
if (!conn_params->initial_r2t)
max_unsolicited_data = conn_params->first_burst_length;
else if (conn_params->immediate_data)
max_unsolicited_data =
min(conn_params->first_burst_length,
conn_params->max_send_pdu_length);
context->ustorm_ag_context.exp_data_acked =
cpu_to_le32(total_ahs_length == 0 ?
min(exp_data_transfer_len,
max_unsolicited_data) :
((u32)(total_ahs_length +
ISCSI_AHS_CNTL_SIZE)));
break;
case ISCSI_TASK_TYPE_TARGET_READ:
val = cpu_to_le32(exp_data_transfer_len);
context->ustorm_ag_context.exp_data_acked = val;
break;
case ISCSI_TASK_TYPE_INITIATOR_READ:
context->ustorm_ag_context.exp_data_acked =
cpu_to_le32((total_ahs_length == 0 ? 0 :
total_ahs_length +
ISCSI_AHS_CNTL_SIZE));
break;
case ISCSI_TASK_TYPE_TARGET_WRITE:
val = cpu_to_le32(task_size);
context->ustorm_ag_context.exp_cont_len = val;
break;
default:
break;
}
}
static
void init_rtdif_task_context(struct rdif_task_context *rdif_context,
struct tdif_task_context *tdif_context,
struct scsi_dif_task_params *dif_task_params,
enum iscsi_task_type task_type)
{
u32 val;
if (!dif_task_params->dif_on_network || !dif_task_params->dif_on_host)
return;
if (task_type == ISCSI_TASK_TYPE_TARGET_WRITE ||
task_type == ISCSI_TASK_TYPE_INITIATOR_READ) {
rdif_context->app_tag_value =
cpu_to_le16(dif_task_params->application_tag);
rdif_context->partial_crc_value = cpu_to_le16(0xffff);
val = cpu_to_le32(dif_task_params->initial_ref_tag);
rdif_context->initial_ref_tag = val;
rdif_context->app_tag_mask =
cpu_to_le16(dif_task_params->application_tag_mask);
SET_FIELD(rdif_context->flags0, RDIF_TASK_CONTEXT_CRC_SEED,
dif_task_params->crc_seed ? 1 : 0);
SET_FIELD(rdif_context->flags0,
RDIF_TASK_CONTEXT_HOST_GUARD_TYPE,
dif_task_params->host_guard_type);
SET_FIELD(rdif_context->flags0,
RDIF_TASK_CONTEXT_PROTECTION_TYPE,
dif_task_params->protection_type);
SET_FIELD(rdif_context->flags0,
RDIF_TASK_CONTEXT_INITIAL_REF_TAG_VALID, 1);
SET_FIELD(rdif_context->flags0,
RDIF_TASK_CONTEXT_KEEP_REF_TAG_CONST,
dif_task_params->keep_ref_tag_const ? 1 : 0);
SET_FIELD(rdif_context->flags1,
RDIF_TASK_CONTEXT_VALIDATE_APP_TAG,
(dif_task_params->validate_app_tag &&
dif_task_params->dif_on_network) ? 1 : 0);
SET_FIELD(rdif_context->flags1,
RDIF_TASK_CONTEXT_VALIDATE_GUARD,
(dif_task_params->validate_guard &&
dif_task_params->dif_on_network) ? 1 : 0);
SET_FIELD(rdif_context->flags1,
RDIF_TASK_CONTEXT_VALIDATE_REF_TAG,
(dif_task_params->validate_ref_tag &&
dif_task_params->dif_on_network) ? 1 : 0);
SET_FIELD(rdif_context->flags1,
RDIF_TASK_CONTEXT_HOST_INTERFACE,
dif_task_params->dif_on_host ? 1 : 0);
SET_FIELD(rdif_context->flags1,
RDIF_TASK_CONTEXT_NETWORK_INTERFACE,
dif_task_params->dif_on_network ? 1 : 0);
SET_FIELD(rdif_context->flags1,
RDIF_TASK_CONTEXT_FORWARD_GUARD,
dif_task_params->forward_guard ? 1 : 0);
SET_FIELD(rdif_context->flags1,
RDIF_TASK_CONTEXT_FORWARD_APP_TAG,
dif_task_params->forward_app_tag ? 1 : 0);
SET_FIELD(rdif_context->flags1,
RDIF_TASK_CONTEXT_FORWARD_REF_TAG,
dif_task_params->forward_ref_tag ? 1 : 0);
SET_FIELD(rdif_context->flags1,
RDIF_TASK_CONTEXT_FORWARD_APP_TAG_WITH_MASK,
dif_task_params->forward_app_tag_with_mask ? 1 : 0);
SET_FIELD(rdif_context->flags1,
RDIF_TASK_CONTEXT_FORWARD_REF_TAG_WITH_MASK,
dif_task_params->forward_ref_tag_with_mask ? 1 : 0);
SET_FIELD(rdif_context->flags1,
RDIF_TASK_CONTEXT_INTERVAL_SIZE,
dif_task_params->dif_block_size_log - 9);
SET_FIELD(rdif_context->state,
RDIF_TASK_CONTEXT_REF_TAG_MASK,
dif_task_params->ref_tag_mask);
SET_FIELD(rdif_context->state, RDIF_TASK_CONTEXT_IGNORE_APP_TAG,
dif_task_params->ignore_app_tag);
}
if (task_type == ISCSI_TASK_TYPE_TARGET_READ ||
task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) {
tdif_context->app_tag_value =
cpu_to_le16(dif_task_params->application_tag);
tdif_context->partial_crc_value_b =
cpu_to_le16(dif_task_params->crc_seed ? 0xffff : 0x0000);
tdif_context->partial_crc_value_a =
cpu_to_le16(dif_task_params->crc_seed ? 0xffff : 0x0000);
SET_FIELD(tdif_context->flags0, TDIF_TASK_CONTEXT_CRC_SEED,
dif_task_params->crc_seed ? 1 : 0);
SET_FIELD(tdif_context->flags0,
TDIF_TASK_CONTEXT_SET_ERROR_WITH_EOP,
dif_task_params->tx_dif_conn_err_en ? 1 : 0);
SET_FIELD(tdif_context->flags1, TDIF_TASK_CONTEXT_FORWARD_GUARD,
dif_task_params->forward_guard ? 1 : 0);
SET_FIELD(tdif_context->flags1,
TDIF_TASK_CONTEXT_FORWARD_APP_TAG,
dif_task_params->forward_app_tag ? 1 : 0);
SET_FIELD(tdif_context->flags1,
TDIF_TASK_CONTEXT_FORWARD_REF_TAG,
dif_task_params->forward_ref_tag ? 1 : 0);
SET_FIELD(tdif_context->flags1, TDIF_TASK_CONTEXT_INTERVAL_SIZE,
dif_task_params->dif_block_size_log - 9);
SET_FIELD(tdif_context->flags1,
TDIF_TASK_CONTEXT_HOST_INTERFACE,
dif_task_params->dif_on_host ? 1 : 0);
SET_FIELD(tdif_context->flags1,
TDIF_TASK_CONTEXT_NETWORK_INTERFACE,
dif_task_params->dif_on_network ? 1 : 0);
val = cpu_to_le32(dif_task_params->initial_ref_tag);
tdif_context->initial_ref_tag = val;
tdif_context->app_tag_mask =
cpu_to_le16(dif_task_params->application_tag_mask);
SET_FIELD(tdif_context->flags0,
TDIF_TASK_CONTEXT_HOST_GUARD_TYPE,
dif_task_params->host_guard_type);
SET_FIELD(tdif_context->flags0,
TDIF_TASK_CONTEXT_PROTECTION_TYPE,
dif_task_params->protection_type);
SET_FIELD(tdif_context->flags0,
TDIF_TASK_CONTEXT_INITIAL_REF_TAG_VALID,
dif_task_params->initial_ref_tag_is_valid ? 1 : 0);
SET_FIELD(tdif_context->flags0,
TDIF_TASK_CONTEXT_KEEP_REF_TAG_CONST,
dif_task_params->keep_ref_tag_const ? 1 : 0);
SET_FIELD(tdif_context->flags1,
TDIF_TASK_CONTEXT_VALIDATE_GUARD,
(dif_task_params->validate_guard &&
dif_task_params->dif_on_host) ? 1 : 0);
SET_FIELD(tdif_context->flags1,
TDIF_TASK_CONTEXT_VALIDATE_APP_TAG,
(dif_task_params->validate_app_tag &&
dif_task_params->dif_on_host) ? 1 : 0);
SET_FIELD(tdif_context->flags1,
TDIF_TASK_CONTEXT_VALIDATE_REF_TAG,
(dif_task_params->validate_ref_tag &&
dif_task_params->dif_on_host) ? 1 : 0);
SET_FIELD(tdif_context->flags1,
TDIF_TASK_CONTEXT_FORWARD_APP_TAG_WITH_MASK,
dif_task_params->forward_app_tag_with_mask ? 1 : 0);
SET_FIELD(tdif_context->flags1,
TDIF_TASK_CONTEXT_FORWARD_REF_TAG_WITH_MASK,
dif_task_params->forward_ref_tag_with_mask ? 1 : 0);
SET_FIELD(tdif_context->flags1,
TDIF_TASK_CONTEXT_REF_TAG_MASK,
dif_task_params->ref_tag_mask);
SET_FIELD(tdif_context->flags0,
TDIF_TASK_CONTEXT_IGNORE_APP_TAG,
dif_task_params->ignore_app_tag ? 1 : 0);
}
}
static void set_local_completion_context(struct e4_iscsi_task_context *context)
{
SET_FIELD(context->ystorm_st_context.state.flags,
YSTORM_ISCSI_TASK_STATE_LOCAL_COMP, 1);
SET_FIELD(context->ustorm_st_context.flags,
USTORM_ISCSI_TASK_ST_CTX_LOCAL_COMP, 1);
}
static int init_rw_iscsi_task(struct iscsi_task_params *task_params,
enum iscsi_task_type task_type,
struct iscsi_conn_params *conn_params,
struct iscsi_common_hdr *pdu_header,
struct scsi_sgl_task_params *sgl_task_params,
struct scsi_initiator_cmd_params *cmd_params,
struct scsi_dif_task_params *dif_task_params)
{
u32 exp_data_transfer_len = conn_params->max_burst_length;
struct e4_iscsi_task_context *cxt;
bool slow_io = false;
u32 task_size, val;
u8 num_sges = 0;
task_size = calc_rw_task_size(task_params, task_type, sgl_task_params,
dif_task_params);
init_default_iscsi_task(task_params, (struct data_hdr *)pdu_header,
task_type);
cxt = task_params->context;
if (task_type == ISCSI_TASK_TYPE_TARGET_READ) {
set_local_completion_context(cxt);
} else if (task_type == ISCSI_TASK_TYPE_TARGET_WRITE) {
val = cpu_to_le32(task_size +
((struct iscsi_r2t_hdr *)pdu_header)->buffer_offset);
cxt->ystorm_st_context.pdu_hdr.r2t.desired_data_trns_len = val;
cxt->mstorm_st_context.expected_itt =
cpu_to_le32(pdu_header->itt);
} else {
val = cpu_to_le32(task_size);
cxt->ystorm_st_context.pdu_hdr.cmd.expected_transfer_length =
val;
init_initiator_rw_cdb_ystorm_context(&cxt->ystorm_st_context,
cmd_params);
val = cpu_to_le32(cmd_params->sense_data_buffer_phys_addr.lo);
cxt->mstorm_st_context.sense_db.lo = val;
val = cpu_to_le32(cmd_params->sense_data_buffer_phys_addr.hi);
cxt->mstorm_st_context.sense_db.hi = val;
}
if (task_params->tx_io_size) {
init_dif_context_flags(&cxt->ystorm_st_context.state.dif_flags,
dif_task_params);
init_dif_context_flags(&cxt->ustorm_st_context.dif_flags,
dif_task_params);
init_scsi_sgl_context(&cxt->ystorm_st_context.state.sgl_params,
&cxt->ystorm_st_context.state.data_desc,
sgl_task_params);
slow_io = scsi_is_slow_sgl(sgl_task_params->num_sges,
sgl_task_params->small_mid_sge);
num_sges = !slow_io ? min_t(u16, sgl_task_params->num_sges,
(u16)SCSI_NUM_SGES_SLOW_SGL_THR) :
ISCSI_WQE_NUM_SGES_SLOWIO;
if (slow_io) {
SET_FIELD(cxt->ystorm_st_context.state.flags,
YSTORM_ISCSI_TASK_STATE_SLOW_IO, 1);
}
} else if (task_params->rx_io_size) {
init_dif_context_flags(&cxt->mstorm_st_context.dif_flags,
dif_task_params);
init_scsi_sgl_context(&cxt->mstorm_st_context.sgl_params,
&cxt->mstorm_st_context.data_desc,
sgl_task_params);
num_sges = !scsi_is_slow_sgl(sgl_task_params->num_sges,
sgl_task_params->small_mid_sge) ?
min_t(u16, sgl_task_params->num_sges,
(u16)SCSI_NUM_SGES_SLOW_SGL_THR) :
ISCSI_WQE_NUM_SGES_SLOWIO;
cxt->mstorm_st_context.rem_task_size = cpu_to_le32(task_size);
}
if (exp_data_transfer_len > task_size ||
task_type != ISCSI_TASK_TYPE_TARGET_WRITE)
exp_data_transfer_len = task_size;
init_ustorm_task_contexts(&task_params->context->ustorm_st_context,
&task_params->context->ustorm_ag_context,
task_size, exp_data_transfer_len, num_sges,
dif_task_params ?
dif_task_params->tx_dif_conn_err_en : false);
set_rw_exp_data_acked_and_cont_len(task_params->context, conn_params,
task_type, task_size,
exp_data_transfer_len,
GET_FIELD(pdu_header->hdr_second_dword,
ISCSI_CMD_HDR_TOTAL_AHS_LEN));
if (dif_task_params)
init_rtdif_task_context(&task_params->context->rdif_context,
&task_params->context->tdif_context,
dif_task_params, task_type);
init_sqe(task_params, sgl_task_params, dif_task_params, pdu_header,
cmd_params, task_type, false);
return 0;
}
int init_initiator_rw_iscsi_task(struct iscsi_task_params *task_params,
struct iscsi_conn_params *conn_params,
struct scsi_initiator_cmd_params *cmd_params,
struct iscsi_cmd_hdr *cmd_header,
struct scsi_sgl_task_params *tx_sgl_params,
struct scsi_sgl_task_params *rx_sgl_params,
struct scsi_dif_task_params *dif_task_params)
{
if (GET_FIELD(cmd_header->flags_attr, ISCSI_CMD_HDR_WRITE))
return init_rw_iscsi_task(task_params,
ISCSI_TASK_TYPE_INITIATOR_WRITE,
conn_params,
(struct iscsi_common_hdr *)cmd_header,
tx_sgl_params, cmd_params,
dif_task_params);
else if (GET_FIELD(cmd_header->flags_attr, ISCSI_CMD_HDR_READ) ||
(task_params->rx_io_size == 0 && task_params->tx_io_size == 0))
return init_rw_iscsi_task(task_params,
ISCSI_TASK_TYPE_INITIATOR_READ,
conn_params,
(struct iscsi_common_hdr *)cmd_header,
rx_sgl_params, cmd_params,
dif_task_params);
else
return -1;
}
int init_initiator_login_request_task(struct iscsi_task_params *task_params,
struct iscsi_login_req_hdr *login_header,
struct scsi_sgl_task_params *tx_params,
struct scsi_sgl_task_params *rx_params)
{
struct e4_iscsi_task_context *cxt;
cxt = task_params->context;
init_default_iscsi_task(task_params,
(struct data_hdr *)login_header,
ISCSI_TASK_TYPE_MIDPATH);
init_ustorm_task_contexts(&cxt->ustorm_st_context,
&cxt->ustorm_ag_context,
task_params->rx_io_size ?
rx_params->total_buffer_size : 0,
task_params->tx_io_size ?
tx_params->total_buffer_size : 0, 0,
0);
if (task_params->tx_io_size)
init_scsi_sgl_context(&cxt->ystorm_st_context.state.sgl_params,
&cxt->ystorm_st_context.state.data_desc,
tx_params);
if (task_params->rx_io_size)
init_scsi_sgl_context(&cxt->mstorm_st_context.sgl_params,
&cxt->mstorm_st_context.data_desc,
rx_params);
cxt->mstorm_st_context.rem_task_size =
cpu_to_le32(task_params->rx_io_size ?
rx_params->total_buffer_size : 0);
init_sqe(task_params, tx_params, NULL,
(struct iscsi_common_hdr *)login_header, NULL,
ISCSI_TASK_TYPE_MIDPATH, false);
return 0;
}
int init_initiator_nop_out_task(struct iscsi_task_params *task_params,
struct iscsi_nop_out_hdr *nop_out_pdu_header,
struct scsi_sgl_task_params *tx_sgl_task_params,
struct scsi_sgl_task_params *rx_sgl_task_params)
{
struct e4_iscsi_task_context *cxt;
cxt = task_params->context;
init_default_iscsi_task(task_params,
(struct data_hdr *)nop_out_pdu_header,
ISCSI_TASK_TYPE_MIDPATH);
if (nop_out_pdu_header->itt == ISCSI_ITT_ALL_ONES)
set_local_completion_context(task_params->context);
if (task_params->tx_io_size)
init_scsi_sgl_context(&cxt->ystorm_st_context.state.sgl_params,
&cxt->ystorm_st_context.state.data_desc,
tx_sgl_task_params);
if (task_params->rx_io_size)
init_scsi_sgl_context(&cxt->mstorm_st_context.sgl_params,
&cxt->mstorm_st_context.data_desc,
rx_sgl_task_params);
init_ustorm_task_contexts(&cxt->ustorm_st_context,
&cxt->ustorm_ag_context,
task_params->rx_io_size ?
rx_sgl_task_params->total_buffer_size : 0,
task_params->tx_io_size ?
tx_sgl_task_params->total_buffer_size : 0,
0, 0);
cxt->mstorm_st_context.rem_task_size =
cpu_to_le32(task_params->rx_io_size ?
rx_sgl_task_params->total_buffer_size :
0);
init_sqe(task_params, tx_sgl_task_params, NULL,
(struct iscsi_common_hdr *)nop_out_pdu_header, NULL,
ISCSI_TASK_TYPE_MIDPATH, false);
return 0;
}
int init_initiator_logout_request_task(struct iscsi_task_params *task_params,
struct iscsi_logout_req_hdr *logout_hdr,
struct scsi_sgl_task_params *tx_params,
struct scsi_sgl_task_params *rx_params)
{
struct e4_iscsi_task_context *cxt;
cxt = task_params->context;
init_default_iscsi_task(task_params,
(struct data_hdr *)logout_hdr,
ISCSI_TASK_TYPE_MIDPATH);
if (task_params->tx_io_size)
init_scsi_sgl_context(&cxt->ystorm_st_context.state.sgl_params,
&cxt->ystorm_st_context.state.data_desc,
tx_params);
if (task_params->rx_io_size)
init_scsi_sgl_context(&cxt->mstorm_st_context.sgl_params,
&cxt->mstorm_st_context.data_desc,
rx_params);
init_ustorm_task_contexts(&cxt->ustorm_st_context,
&cxt->ustorm_ag_context,
task_params->rx_io_size ?
rx_params->total_buffer_size : 0,
task_params->tx_io_size ?
tx_params->total_buffer_size : 0,
0, 0);
cxt->mstorm_st_context.rem_task_size =
cpu_to_le32(task_params->rx_io_size ?
rx_params->total_buffer_size : 0);
init_sqe(task_params, tx_params, NULL,
(struct iscsi_common_hdr *)logout_hdr, NULL,
ISCSI_TASK_TYPE_MIDPATH, false);
return 0;
}
int init_initiator_tmf_request_task(struct iscsi_task_params *task_params,
struct iscsi_tmf_request_hdr *tmf_header)
{
init_default_iscsi_task(task_params, (struct data_hdr *)tmf_header,
ISCSI_TASK_TYPE_MIDPATH);
init_sqe(task_params, NULL, NULL,
(struct iscsi_common_hdr *)tmf_header, NULL,
ISCSI_TASK_TYPE_MIDPATH, false);
return 0;
}
int init_initiator_text_request_task(struct iscsi_task_params *task_params,
struct iscsi_text_request_hdr *text_header,
struct scsi_sgl_task_params *tx_params,
struct scsi_sgl_task_params *rx_params)
{
struct e4_iscsi_task_context *cxt;
cxt = task_params->context;
init_default_iscsi_task(task_params,
(struct data_hdr *)text_header,
ISCSI_TASK_TYPE_MIDPATH);
if (task_params->tx_io_size)
init_scsi_sgl_context(&cxt->ystorm_st_context.state.sgl_params,
&cxt->ystorm_st_context.state.data_desc,
tx_params);
if (task_params->rx_io_size)
init_scsi_sgl_context(&cxt->mstorm_st_context.sgl_params,
&cxt->mstorm_st_context.data_desc,
rx_params);
cxt->mstorm_st_context.rem_task_size =
cpu_to_le32(task_params->rx_io_size ?
rx_params->total_buffer_size : 0);
init_ustorm_task_contexts(&cxt->ustorm_st_context,
&cxt->ustorm_ag_context,
task_params->rx_io_size ?
rx_params->total_buffer_size : 0,
task_params->tx_io_size ?
tx_params->total_buffer_size : 0, 0, 0);
init_sqe(task_params, tx_params, NULL,
(struct iscsi_common_hdr *)text_header, NULL,
ISCSI_TASK_TYPE_MIDPATH, false);
return 0;
}
int init_cleanup_task(struct iscsi_task_params *task_params)
{
init_sqe(task_params, NULL, NULL, NULL, NULL, ISCSI_TASK_TYPE_MIDPATH,
true);
return 0;
}
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