Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 802 insertions, 0 deletions

diff --git a/drivers/scsi/qedi/qedi_fw_api.c b/drivers/scsi/qedi/qedi_fw_api.c
new file mode 100644
index 000000000..642556a1c
--- /dev/null
+++ b/drivers/scsi/qedi/qedi_fw_api.c
@@ -0,0 +1,802 @@
+// 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 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,
+		  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 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,
+		  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 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 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 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 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 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 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 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;
+}