// SPDX-License-Identifier: GPL-2.0-only
/*
* QLogic iSCSI Offload Driver
* Copyright (c) 2016 Cavium Inc.
*/
#include <linux/blkdev.h>
#include <scsi/scsi_tcq.h>
#include <linux/delay.h>
#include "qedi.h"
#include "qedi_iscsi.h"
#include "qedi_gbl.h"
#include "qedi_fw_iscsi.h"
#include "qedi_fw_scsi.h"
static int send_iscsi_tmf(struct qedi_conn *qedi_conn,
struct iscsi_task *mtask, struct iscsi_task *ctask);
void qedi_iscsi_unmap_sg_list(struct qedi_cmd *cmd)
{
struct scsi_cmnd *sc = cmd->scsi_cmd;
if (cmd->io_tbl.sge_valid && sc) {
cmd->io_tbl.sge_valid = 0;
scsi_dma_unmap(sc);
}
}
static void qedi_process_logout_resp(struct qedi_ctx *qedi,
union iscsi_cqe *cqe,
struct iscsi_task *task,
struct qedi_conn *qedi_conn)
{
struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
struct iscsi_logout_rsp *resp_hdr;
struct iscsi_session *session = conn->session;
struct iscsi_logout_response_hdr *cqe_logout_response;
struct qedi_cmd *cmd;
cmd = (struct qedi_cmd *)task->dd_data;
cqe_logout_response = &cqe->cqe_common.iscsi_hdr.logout_response;
spin_lock(&session->back_lock);
resp_hdr = (struct iscsi_logout_rsp *)&qedi_conn->gen_pdu.resp_hdr;
memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
resp_hdr->opcode = cqe_logout_response->opcode;
resp_hdr->flags = cqe_logout_response->flags;
resp_hdr->hlength = 0;
resp_hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
resp_hdr->statsn = cpu_to_be32(cqe_logout_response->stat_sn);
resp_hdr->exp_cmdsn = cpu_to_be32(cqe_logout_response->exp_cmd_sn);
resp_hdr->max_cmdsn = cpu_to_be32(cqe_logout_response->max_cmd_sn);
resp_hdr->t2wait = cpu_to_be32(cqe_logout_response->time_2_wait);
resp_hdr->t2retain = cpu_to_be32(cqe_logout_response->time_2_retain);
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
"Freeing tid=0x%x for cid=0x%x\n",
cmd->task_id, qedi_conn->iscsi_conn_id);
spin_lock(&qedi_conn->list_lock);
if (likely(cmd->io_cmd_in_list)) {
cmd->io_cmd_in_list = false;
list_del_init(&cmd->io_cmd);
qedi_conn->active_cmd_count--;
} else {
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
"Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n",
cmd->task_id, qedi_conn->iscsi_conn_id,
&cmd->io_cmd);
}
spin_unlock(&qedi_conn->list_lock);
cmd->state = RESPONSE_RECEIVED;
__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
spin_unlock(&session->back_lock);
}
static void qedi_process_text_resp(struct qedi_ctx *qedi,
union iscsi_cqe *cqe,
struct iscsi_task *task,
struct qedi_conn *qedi_conn)
{
struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
struct iscsi_session *session = conn->session;
struct iscsi_task_context *task_ctx;
struct iscsi_text_rsp *resp_hdr_ptr;
struct iscsi_text_response_hdr *cqe_text_response;
struct qedi_cmd *cmd;
int pld_len;
cmd = (struct qedi_cmd *)task->dd_data;
task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
cqe_text_response = &cqe->cqe_common.iscsi_hdr.text_response;
spin_lock(&session->back_lock);
resp_hdr_ptr = (struct iscsi_text_rsp *)&qedi_conn->gen_pdu.resp_hdr;
memset(resp_hdr_ptr, 0, sizeof(struct iscsi_hdr));
resp_hdr_ptr->opcode = cqe_text_response->opcode;
resp_hdr_ptr->flags = cqe_text_response->flags;
resp_hdr_ptr->hlength = 0;
hton24(resp_hdr_ptr->dlength,
(cqe_text_response->hdr_second_dword &
ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK));
resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
conn->session->age);
resp_hdr_ptr->ttt = cqe_text_response->ttt;
resp_hdr_ptr->statsn = cpu_to_be32(cqe_text_response->stat_sn);
resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_text_response->exp_cmd_sn);
resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_text_response->max_cmd_sn);
pld_len = cqe_text_response->hdr_second_dword &
ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK;
qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
memset(task_ctx, '\0', sizeof(*task_ctx));
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
"Freeing tid=0x%x for cid=0x%x\n",
cmd->task_id, qedi_conn->iscsi_conn_id);
spin_lock(&qedi_conn->list_lock);
if (likely(cmd->io_cmd_in_list)) {
cmd->io_cmd_in_list = false;
list_del_init(&cmd->io_cmd);
qedi_conn->active_cmd_count--;
} else {
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
"Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n",
cmd->task_id, qedi_conn->iscsi_conn_id,
&cmd->io_cmd);
}
spin_unlock(&qedi_conn->list_lock);
cmd->state = RESPONSE_RECEIVED;
__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
qedi_conn->gen_pdu.resp_buf,
(qedi_conn->gen_pdu.resp_wr_ptr -
qedi_conn->gen_pdu.resp_buf));
spin_unlock(&session->back_lock);
}
static void qedi_tmf_resp_work(struct work_struct *work)
{
struct qedi_cmd *qedi_cmd =
container_of(work, struct qedi_cmd, tmf_work);
struct qedi_conn *qedi_conn = qedi_cmd->conn;
struct qedi_ctx *qedi = qedi_conn->qedi;
struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
struct iscsi_session *session = conn->session;
struct iscsi_tm_rsp *resp_hdr_ptr;
int rval = 0;
resp_hdr_ptr = (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
rval = qedi_cleanup_all_io(qedi, qedi_conn, qedi_cmd->task, true);
if (rval)
goto exit_tmf_resp;
spin_lock(&session->back_lock);
__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
spin_unlock(&session->back_lock);
exit_tmf_resp:
kfree(resp_hdr_ptr);
spin_lock(&qedi_conn->tmf_work_lock);
qedi_conn->fw_cleanup_works--;
spin_unlock(&qedi_conn->tmf_work_lock);
}
static void qedi_process_tmf_resp(struct qedi_ctx *qedi,
union iscsi_cqe *cqe,
struct iscsi_task *task,
struct qedi_conn *qedi_conn)
{
struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
struct iscsi_session *session = conn->session;
struct iscsi_tmf_response_hdr *cqe_tmp_response;
struct iscsi_tm_rsp *resp_hdr_ptr;
struct iscsi_tm *tmf_hdr;
struct qedi_cmd *qedi_cmd = NULL;
cqe_tmp_response = &cqe->cqe_common.iscsi_hdr.tmf_response;
qedi_cmd = task->dd_data;
qedi_cmd->tmf_resp_buf = kzalloc(sizeof(*resp_hdr_ptr), GFP_ATOMIC);
if (!qedi_cmd->tmf_resp_buf) {
QEDI_ERR(&qedi->dbg_ctx,
"Failed to allocate resp buf, cid=0x%x\n",
qedi_conn->iscsi_conn_id);
return;
}
spin_lock(&session->back_lock);
resp_hdr_ptr = (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
memset(resp_hdr_ptr, 0, sizeof(struct iscsi_tm_rsp));
/* Fill up the header */
resp_hdr_ptr->opcode = cqe_tmp_response->opcode;
resp_hdr_ptr->flags = cqe_tmp_response->hdr_flags;
resp_hdr_ptr->response = cqe_tmp_response->hdr_response;
resp_hdr_ptr->hlength = 0;
hton24(resp_hdr_ptr->dlength,
(cqe_tmp_response->hdr_second_dword &
ISCSI_TMF_RESPONSE_HDR_DATA_SEG_LEN_MASK));
resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
conn->session->age);
resp_hdr_ptr->statsn = cpu_to_be32(cqe_tmp_response->stat_sn);
resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_tmp_response->exp_cmd_sn);
resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_tmp_response->max_cmd_sn);
tmf_hdr = (struct iscsi_tm *)qedi_cmd->task->hdr;
spin_lock(&qedi_conn->list_lock);
if (likely(qedi_cmd->io_cmd_in_list)) {
qedi_cmd->io_cmd_in_list = false;
list_del_init(&qedi_cmd->io_cmd);
qedi_conn->active_cmd_count--;
}
spin_unlock(&qedi_conn->list_lock);
spin_lock(&qedi_conn->tmf_work_lock);
switch (tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) {
case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET:
case ISCSI_TM_FUNC_TARGET_WARM_RESET:
case ISCSI_TM_FUNC_TARGET_COLD_RESET:
if (qedi_conn->ep_disconnect_starting) {
/* Session is down so ep_disconnect will clean up */
spin_unlock(&qedi_conn->tmf_work_lock);
goto unblock_sess;
}
qedi_conn->fw_cleanup_works++;
spin_unlock(&qedi_conn->tmf_work_lock);
INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_resp_work);
queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
goto unblock_sess;
}
spin_unlock(&qedi_conn->tmf_work_lock);
__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
kfree(resp_hdr_ptr);
unblock_sess:
spin_unlock(&session->back_lock);
}
static void qedi_process_login_resp(struct qedi_ctx *qedi,
union iscsi_cqe *cqe,
struct iscsi_task *task,
struct qedi_conn *qedi_conn)
{
struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
struct iscsi_session *session = conn->session;
struct iscsi_task_context *task_ctx;
struct iscsi_login_rsp *resp_hdr_ptr;
struct iscsi_login_response_hdr *cqe_login_response;
struct qedi_cmd *cmd;
int pld_len;
cmd = (struct qedi_cmd *)task->dd_data;
cqe_login_response = &cqe->cqe_common.iscsi_hdr.login_response;
task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
spin_lock(&session->back_lock);
resp_hdr_ptr = (struct iscsi_login_rsp *)&qedi_conn->gen_pdu.resp_hdr;
memset(resp_hdr_ptr, 0, sizeof(struct iscsi_login_rsp));
resp_hdr_ptr->opcode = cqe_login_response->opcode;
resp_hdr_ptr->flags = cqe_login_response->flags_attr;
resp_hdr_ptr->hlength = 0;
hton24(resp_hdr_ptr->dlength,
(cqe_login_response->hdr_second_dword &
ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK));
resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
conn->session->age);
resp_hdr_ptr->tsih = cqe_login_response->tsih;
resp_hdr_ptr->statsn = cpu_to_be32(cqe_login_response->stat_sn);
resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_login_response->exp_cmd_sn);
resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_login_response->max_cmd_sn);
resp_hdr_ptr->status_class = cqe_login_response->status_class;
resp_hdr_ptr->status_detail = cqe_login_response->status_detail;
pld_len = cqe_login_response->hdr_second_dword &
ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK;
qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
spin_lock(&qedi_conn->list_lock);
if (likely(cmd->io_cmd_in_list)) {
cmd->io_cmd_in_list = false;
list_del_init(&cmd->io_cmd);
qedi_conn->active_cmd_count--;
}
spin_unlock(&qedi_conn->list_lock);
memset(task_ctx, '\0', sizeof(*task_ctx));
__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
qedi_conn->gen_pdu.resp_buf,
(qedi_conn->gen_pdu.resp_wr_ptr -
qedi_conn->gen_pdu.resp_buf));
spin_unlock(&session->back_lock);
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
"Freeing tid=0x%x for cid=0x%x\n",
cmd->task_id, qedi_conn->iscsi_conn_id);
cmd->state = RESPONSE_RECEIVED;
}
static void qedi_get_rq_bdq_buf(struct qedi_ctx *qedi,
struct iscsi_cqe_unsolicited *cqe,
char *ptr, int len)
{
u16 idx = 0;
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
"pld_len [%d], bdq_prod_idx [%d], idx [%d]\n",
len, qedi->bdq_prod_idx,
(qedi->bdq_prod_idx % qedi->rq_num_entries));
/* Obtain buffer address from rqe_opaque */
idx = cqe->rqe_opaque;
if (idx > (QEDI_BDQ_NUM - 1)) {
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
"wrong idx %d returned by FW, dropping the unsolicited pkt\n",
idx);
return;
}
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
"rqe_opaque [0x%p], idx [%d]\n", cqe->rqe_opaque, idx);
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
"unsol_cqe_type = %d\n", cqe->unsol_cqe_type);
switch (cqe->unsol_cqe_type) {
case ISCSI_CQE_UNSOLICITED_SINGLE:
case ISCSI_CQE_UNSOLICITED_FIRST:
if (len)
memcpy(ptr, (void *)qedi->bdq[idx].buf_addr, len);
break;
case ISCSI_CQE_UNSOLICITED_MIDDLE:
case ISCSI_CQE_UNSOLICITED_LAST:
break;
default:
break;
}
}
static void qedi_put_rq_bdq_buf(struct qedi_ctx *qedi,
struct iscsi_cqe_unsolicited *cqe,
int count)
{
u16 idx = 0;
struct scsi_bd *pbl;
/* Obtain buffer address from rqe_opaque */
idx = cqe->rqe_opaque;
if (idx > (QEDI_BDQ_NUM - 1)) {
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
"wrong idx %d returned by FW, dropping the unsolicited pkt\n",
idx);
return;
}
pbl = (struct scsi_bd *)qedi->bdq_pbl;
pbl += (qedi->bdq_prod_idx % qedi->rq_num_entries);
pbl->address.hi = cpu_to_le32(QEDI_U64_HI(qedi->bdq[idx].buf_dma));
pbl->address.lo = cpu_to_le32(QEDI_U64_LO(qedi->bdq[idx].buf_dma));
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
"pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx] idx [%d]\n",
pbl, pbl->address.hi, pbl->address.lo, idx);
pbl->opaque.iscsi_opaque.reserved_zero[0] = 0;
pbl->opaque.iscsi_opaque.reserved_zero[1] = 0;
pbl->opaque.iscsi_opaque.reserved_zero[2] = 0;
pbl->opaque.iscsi_opaque.opaque = cpu_to_le32(idx);
/* Increment producer to let f/w know we've handled the frame */
qedi->bdq_prod_idx += count;
writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
readw(qedi->bdq_primary_prod);
writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
readw(qedi->bdq_secondary_prod);
}
static void qedi_unsol_pdu_adjust_bdq(struct qedi_ctx *qedi,
struct iscsi_cqe_unsolicited *cqe,
u32 pdu_len, u32 num_bdqs,
char *bdq_data)
{
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
"num_bdqs [%d]\n", num_bdqs);
qedi_get_rq_bdq_buf(qedi, cqe, bdq_data, pdu_len);
qedi_put_rq_bdq_buf(qedi, cqe, (num_bdqs + 1));
}
static int qedi_process_nopin_mesg(struct qedi_ctx *qedi,
union iscsi_cqe *cqe,
struct iscsi_task *task,
struct qedi_conn *qedi_conn, u16 que_idx)
{
struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
struct iscsi_session *session = conn->session;
struct iscsi_nop_in_hdr *cqe_nop_in;
struct iscsi_nopin *hdr;
struct qedi_cmd *cmd;
int tgt_async_nop = 0;
u32 lun[2];
u32 pdu_len, num_bdqs;
char bdq_data[QEDI_BDQ_BUF_SIZE];
unsigned long flags;
spin_lock_bh(&session->back_lock);
cqe_nop_in = &cqe->cqe_common.iscsi_hdr.nop_in;
pdu_len = cqe_nop_in->hdr_second_dword &
ISCSI_NOP_IN_HDR_DATA_SEG_LEN_MASK;
num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
hdr = (struct iscsi_nopin *)&qedi_conn->gen_pdu.resp_hdr;
memset(hdr, 0, sizeof(struct iscsi_hdr));
hdr->opcode = cqe_nop_in->opcode;
hdr->max_cmdsn = cpu_to_be32(cqe_nop_in->max_cmd_sn);
hdr->exp_cmdsn = cpu_to_be32(cqe_nop_in->exp_cmd_sn);
hdr->statsn = cpu_to_be32(cqe_nop_in->stat_sn);
hdr->ttt = cpu_to_be32(cqe_nop_in->ttt);
if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
spin_lock_irqsave(&qedi->hba_lock, flags);
qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
pdu_len, num_bdqs, bdq_data);
hdr->itt = RESERVED_ITT;
tgt_async_nop = 1;
spin_unlock_irqrestore(&qedi->hba_lock, flags);
goto done;
}
/* Response to one of our nop-outs */
if (task) {
cmd = task->dd_data;
hdr->flags = ISCSI_FLAG_CMD_FINAL;
hdr->itt = build_itt(cqe->cqe_solicited.itid,
conn->session->age);
lun[0] = 0xffffffff;
lun[1] = 0xffffffff;
memcpy(&hdr->lun, lun, sizeof(struct scsi_lun));
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
"Freeing tid=0x%x for cid=0x%x\n",
cmd->task_id, qedi_conn->iscsi_conn_id);
cmd->state = RESPONSE_RECEIVED;
spin_lock(&qedi_conn->list_lock);
if (likely(cmd->io_cmd_in_list)) {
cmd->io_cmd_in_list = false;
list_del_init(&cmd->io_cmd);
qedi_conn->active_cmd_count--;
}
spin_unlock(&qedi_conn->list_lock);
}
done:
__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, bdq_data, pdu_len);
spin_unlock_bh(&session->back_lock);
return tgt_async_nop;
}
static void qedi_process_async_mesg(struct qedi_ctx *qedi,
union iscsi_cqe *cqe,
struct iscsi_task *task,
struct qedi_conn *qedi_conn,
u16 que_idx)
{
struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
struct iscsi_session *session = conn->session;
struct iscsi_async_msg_hdr *cqe_async_msg;
struct iscsi_async *resp_hdr;
u32 lun[2];
u32 pdu_len, num_bdqs;
char bdq_data[QEDI_BDQ_BUF_SIZE];
unsigned long flags;
spin_lock_bh(&session->back_lock);
cqe_async_msg = &cqe->cqe_common.iscsi_hdr.async_msg;
pdu_len = cqe_async_msg->hdr_second_dword &
ISCSI_ASYNC_MSG_HDR_DATA_SEG_LEN_MASK;
num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
spin_lock_irqsave(&qedi->hba_lock, flags);
qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
pdu_len, num_bdqs, bdq_data);
spin_unlock_irqrestore(&qedi->hba_lock, flags);
}
resp_hdr = (struct iscsi_async *)&qedi_conn->gen_pdu.resp_hdr;
memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
resp_hdr->opcode = cqe_async_msg->opcode;
resp_hdr->flags = 0x80;
lun[0] = cpu_to_be32(cqe_async_msg->lun.lo);
lun[1] = cpu_to_be32(cqe_async_msg->lun.hi);
memcpy(&resp_hdr->lun, lun, sizeof(struct scsi_lun));
resp_hdr->exp_cmdsn = cpu_to_be32(cqe_async_msg->exp_cmd_sn);
resp_hdr->max_cmdsn = cpu_to_be32(cqe_async_msg->max_cmd_sn);
resp_hdr->statsn = cpu_to_be32(cqe_async_msg->stat_sn);
resp_hdr->async_event = cqe_async_msg->async_event;
resp_hdr->async_vcode = cqe_async_msg->async_vcode;
resp_hdr->param1 = cpu_to_be16(cqe_async_msg->param1_rsrv);
resp_hdr->param2 = cpu_to_be16(cqe_async_msg->param2_rsrv);
resp_hdr->param3 = cpu_to_be16(cqe_async_msg->param3_rsrv);
__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, bdq_data,
pdu_len);
spin_unlock_bh(&session->back_lock);
}
static void qedi_process_reject_mesg(struct qedi_ctx *qedi,
union iscsi_cqe *cqe,
struct iscsi_task *task,
struct qedi_conn *qedi_conn,
uint16_t que_idx)
{
struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
struct iscsi_session *session = conn->session;
struct iscsi_reject_hdr *cqe_reject;
struct iscsi_reject *hdr;
u32 pld_len, num_bdqs;
unsigned long flags;
spin_lock_bh(&session->back_lock);
cqe_reject = &cqe->cqe_common.iscsi_hdr.reject;
pld_len = cqe_reject->hdr_second_dword &
ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK;
num_bdqs = pld_len / QEDI_BDQ_BUF_SIZE;
if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
spin_lock_irqsave(&qedi->hba_lock, flags);
qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
pld_len, num_bdqs, conn->data);
spin_unlock_irqrestore(&qedi->hba_lock, flags);
}
hdr = (struct iscsi_reject *)&qedi_conn->gen_pdu.resp_hdr;
memset(hdr, 0, sizeof(struct iscsi_hdr));
hdr->opcode = cqe_reject->opcode;
hdr->reason = cqe_reject->hdr_reason;
hdr->flags = cqe_reject->hdr_flags;
hton24(hdr->dlength, (cqe_reject->hdr_second_dword &
ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK));
hdr->max_cmdsn = cpu_to_be32(cqe_reject->max_cmd_sn);
hdr->exp_cmdsn = cpu_to_be32(cqe_reject->exp_cmd_sn);
hdr->statsn = cpu_to_be32(cqe_reject->stat_sn);
hdr->ffffffff = cpu_to_be32(0xffffffff);
__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
conn->data, pld_len);
spin_unlock_bh(&session->back_lock);
}
static void qedi_scsi_completion(struct qedi_ctx *qedi,
union iscsi_cqe *cqe,
struct iscsi_task *task,
struct iscsi_conn *conn)
{
struct scsi_cmnd *sc_cmd;
struct qedi_cmd *cmd = task->dd_data;
struct iscsi_session *session = conn->session;
struct iscsi_scsi_rsp *hdr;
struct iscsi_data_in_hdr *cqe_data_in;
int datalen = 0;
struct qedi_conn *qedi_conn;
u32 iscsi_cid;
u8 cqe_err_bits = 0;
iscsi_cid = cqe->cqe_common.conn_id;
qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
cqe_data_in = &cqe->cqe_common.iscsi_hdr.data_in;
cqe_err_bits =
cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
spin_lock_bh(&session->back_lock);
/* get the scsi command */
sc_cmd = cmd->scsi_cmd;
if (!sc_cmd) {
QEDI_WARN(&qedi->dbg_ctx, "sc_cmd is NULL!\n");
goto error;
}
if (!iscsi_cmd(sc_cmd)->task) {
QEDI_WARN(&qedi->dbg_ctx,
"NULL task pointer, returned in another context.\n");
goto error;
}
if (!scsi_cmd_to_rq(sc_cmd)->q) {
QEDI_WARN(&qedi->dbg_ctx,
"request->q is NULL so request is not valid, sc_cmd=%p.\n",
sc_cmd);
goto error;
}
qedi_iscsi_unmap_sg_list(cmd);
hdr = (struct iscsi_scsi_rsp *)task->hdr;
hdr->opcode = cqe_data_in->opcode;
hdr->max_cmdsn = cpu_to_be32(cqe_data_in->max_cmd_sn);
hdr->exp_cmdsn = cpu_to_be32(cqe_data_in->exp_cmd_sn);
hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
hdr->response = cqe_data_in->reserved1;
hdr->cmd_status = cqe_data_in->status_rsvd;
hdr->flags = cqe_data_in->flags;
hdr->residual_count = cpu_to_be32(cqe_data_in->residual_count);
if (hdr->cmd_status == SAM_STAT_CHECK_CONDITION) {
datalen = cqe_data_in->reserved2 &
ISCSI_COMMON_HDR_DATA_SEG_LEN_MASK;
memcpy((char *)conn->data, (char *)cmd->sense_buffer, datalen);
}
/* If f/w reports data underrun err then set residual to IO transfer
* length, set Underrun flag and clear Overrun flag explicitly
*/
if (unlikely(cqe_err_bits &&
GET_FIELD(cqe_err_bits, CQE_ERROR_BITMAP_UNDER_RUN_ERR))) {
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
"Under flow itt=0x%x proto flags=0x%x tid=0x%x cid 0x%x fw resid 0x%x sc dlen 0x%x\n",
hdr->itt, cqe_data_in->flags, cmd->task_id,
qedi_conn->iscsi_conn_id, hdr->residual_count,
scsi_bufflen(sc_cmd));
hdr->residual_count = cpu_to_be32(scsi_bufflen(sc_cmd));
hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW;
hdr->flags &= (~ISCSI_FLAG_CMD_OVERFLOW);
}
spin_lock(&qedi_conn->list_lock);
if (likely(cmd->io_cmd_in_list)) {
cmd->io_cmd_in_list = false;
list_del_init(&cmd->io_cmd);
qedi_conn->active_cmd_count--;
}
spin_unlock(&qedi_conn->list_lock);
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
"Freeing tid=0x%x for cid=0x%x\n",
cmd->task_id, qedi_conn->iscsi_conn_id);
cmd->state = RESPONSE_RECEIVED;
if (qedi_io_tracing)
qedi_trace_io(qedi, task, cmd->task_id, QEDI_IO_TRACE_RSP);
__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
conn->data, datalen);
error:
spin_unlock_bh(&session->back_lock);
}
static void qedi_mtask_completion(struct qedi_ctx *qedi,
union iscsi_cqe *cqe,
struct iscsi_task *task,
struct qedi_conn *conn, uint16_t que_idx)
{
struct iscsi_conn *iscsi_conn;
u32 hdr_opcode;
hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
iscsi_conn = conn->cls_conn->dd_data;
switch (hdr_opcode) {
case ISCSI_OPCODE_SCSI_RESPONSE:
case ISCSI_OPCODE_DATA_IN:
qedi_scsi_completion(qedi, cqe, task, iscsi_conn);
break;
case ISCSI_OPCODE_LOGIN_RESPONSE:
qedi_process_login_resp(qedi, cqe, task, conn);
break;
case ISCSI_OPCODE_TMF_RESPONSE:
qedi_process_tmf_resp(qedi, cqe, task, conn);
break;
case ISCSI_OPCODE_TEXT_RESPONSE:
qedi_process_text_resp(qedi, cqe, task, conn);
break;
case ISCSI_OPCODE_LOGOUT_RESPONSE:
qedi_process_logout_resp(qedi, cqe, task, conn);
break;
case ISCSI_OPCODE_NOP_IN:
qedi_process_nopin_mesg(qedi, cqe, task, conn, que_idx);
break;
default:
QEDI_ERR(&qedi->dbg_ctx, "unknown opcode\n");
}
}
static void qedi_process_nopin_local_cmpl(struct qedi_ctx *qedi,
struct iscsi_cqe_solicited *cqe,
struct iscsi_task *task,
struct qedi_conn *qedi_conn)
{
struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
struct iscsi_session *session = conn->session;
struct qedi_cmd *cmd = task->dd_data;
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UNSOL,
"itid=0x%x, cmd task id=0x%x\n",
cqe->itid, cmd->task_id);
cmd->state = RESPONSE_RECEIVED;
spin_lock_bh(&session->back_lock);
__iscsi_put_task(task);
spin_unlock_bh(&session->back_lock);
}
static void qedi_process_cmd_cleanup_resp(struct qedi_ctx *qedi,
struct iscsi_cqe_solicited *cqe,
struct iscsi_conn *conn)
{
struct qedi_work_map *work, *work_tmp;
u32 proto_itt = cqe->itid;
int found = 0;
struct qedi_cmd *qedi_cmd = NULL;
u32 iscsi_cid;
struct qedi_conn *qedi_conn;
struct qedi_cmd *dbg_cmd;
struct iscsi_task *mtask, *task;
struct iscsi_tm *tmf_hdr = NULL;
iscsi_cid = cqe->conn_id;
qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
if (!qedi_conn) {
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
"icid not found 0x%x\n", cqe->conn_id);
return;
}
/* Based on this itt get the corresponding qedi_cmd */
spin_lock_bh(&qedi_conn->tmf_work_lock);
list_for_each_entry_safe(work, work_tmp, &qedi_conn->tmf_work_list,
list) {
if (work->rtid == proto_itt) {
/* We found the command */
qedi_cmd = work->qedi_cmd;
if (!qedi_cmd->list_tmf_work) {
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
"TMF work not found, cqe->tid=0x%x, cid=0x%x\n",
proto_itt, qedi_conn->iscsi_conn_id);
WARN_ON(1);
}
found = 1;
mtask = qedi_cmd->task;
task = work->ctask;
tmf_hdr = (struct iscsi_tm *)mtask->hdr;
list_del_init(&work->list);
kfree(work);
qedi_cmd->list_tmf_work = NULL;
}
}
spin_unlock_bh(&qedi_conn->tmf_work_lock);
if (!found)
goto check_cleanup_reqs;
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
"TMF work, cqe->tid=0x%x, tmf flags=0x%x, cid=0x%x\n",
proto_itt, tmf_hdr->flags, qedi_conn->iscsi_conn_id);
spin_lock_bh(&conn->session->back_lock);
if (iscsi_task_is_completed(task)) {
QEDI_NOTICE(&qedi->dbg_ctx,
"IO task completed, tmf rtt=0x%x, cid=0x%x\n",
get_itt(tmf_hdr->rtt), qedi_conn->iscsi_conn_id);
goto unlock;
}
dbg_cmd = task->dd_data;
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
"Abort tmf rtt=0x%x, i/o itt=0x%x, i/o tid=0x%x, cid=0x%x\n",
get_itt(tmf_hdr->rtt), get_itt(task->itt), dbg_cmd->task_id,
qedi_conn->iscsi_conn_id);
spin_lock(&qedi_conn->list_lock);
if (likely(dbg_cmd->io_cmd_in_list)) {
dbg_cmd->io_cmd_in_list = false;
list_del_init(&dbg_cmd->io_cmd);
qedi_conn->active_cmd_count--;
}
spin_unlock(&qedi_conn->list_lock);
qedi_cmd->state = CLEANUP_RECV;
unlock:
spin_unlock_bh(&conn->session->back_lock);
wake_up_interruptible(&qedi_conn->wait_queue);
return;
check_cleanup_reqs:
if (atomic_inc_return(&qedi_conn->cmd_cleanup_cmpl) ==
qedi_conn->cmd_cleanup_req) {
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
"Freeing tid=0x%x for cid=0x%x\n",
cqe->itid, qedi_conn->iscsi_conn_id);
wake_up(&qedi_conn->wait_queue);
}
}
void qedi_fp_process_cqes(struct qedi_work *work)
{
struct qedi_ctx *qedi = work->qedi;
union iscsi_cqe *cqe = &work->cqe;
struct iscsi_task *task = NULL;
struct iscsi_nopout *nopout_hdr;
struct qedi_conn *q_conn;
struct iscsi_conn *conn;
struct qedi_cmd *qedi_cmd;
u32 comp_type;
u32 iscsi_cid;
u32 hdr_opcode;
u16 que_idx = work->que_idx;
u8 cqe_err_bits = 0;
comp_type = cqe->cqe_common.cqe_type;
hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
cqe_err_bits =
cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
"fw_cid=0x%x, cqe type=0x%x, opcode=0x%x\n",
cqe->cqe_common.conn_id, comp_type, hdr_opcode);
if (comp_type >= MAX_ISCSI_CQES_TYPE) {
QEDI_WARN(&qedi->dbg_ctx, "Invalid CqE type\n");
return;
}
iscsi_cid = cqe->cqe_common.conn_id;
q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
if (!q_conn) {
QEDI_WARN(&qedi->dbg_ctx,
"Session no longer exists for cid=0x%x!!\n",
iscsi_cid);
return;
}
conn = q_conn->cls_conn->dd_data;
if (unlikely(cqe_err_bits &&
GET_FIELD(cqe_err_bits,
CQE_ERROR_BITMAP_DATA_DIGEST_ERR))) {
iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST);
return;
}
switch (comp_type) {
case ISCSI_CQE_TYPE_SOLICITED:
case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
qedi_cmd = container_of(work, struct qedi_cmd, cqe_work);
task = qedi_cmd->task;
if (!task) {
QEDI_WARN(&qedi->dbg_ctx, "task is NULL\n");
return;
}
/* Process NOPIN local completion */
nopout_hdr = (struct iscsi_nopout *)task->hdr;
if ((nopout_hdr->itt == RESERVED_ITT) &&
(cqe->cqe_solicited.itid != (u16)RESERVED_ITT)) {
qedi_process_nopin_local_cmpl(qedi, &cqe->cqe_solicited,
task, q_conn);
} else {
cqe->cqe_solicited.itid =
qedi_get_itt(cqe->cqe_solicited);
/* Process other solicited responses */
qedi_mtask_completion(qedi, cqe, task, q_conn, que_idx);
}
break;
case ISCSI_CQE_TYPE_UNSOLICITED:
switch (hdr_opcode) {
case ISCSI_OPCODE_NOP_IN:
qedi_process_nopin_mesg(qedi, cqe, task, q_conn,
que_idx);
break;
case ISCSI_OPCODE_ASYNC_MSG:
qedi_process_async_mesg(qedi, cqe, task, q_conn,
que_idx);
break;
case ISCSI_OPCODE_REJECT:
qedi_process_reject_mesg(qedi, cqe, task, q_conn,
que_idx);
break;
}
goto exit_fp_process;
case ISCSI_CQE_TYPE_DUMMY:
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "Dummy CqE\n");
goto exit_fp_process;
case ISCSI_CQE_TYPE_TASK_CLEANUP:
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "CleanUp CqE\n");
qedi_process_cmd_cleanup_resp(qedi, &cqe->cqe_solicited, conn);
goto exit_fp_process;
default:
QEDI_ERR(&qedi->dbg_ctx, "Error cqe.\n");
break;
}
exit_fp_process:
return;
}
static void qedi_ring_doorbell(struct qedi_conn *qedi_conn)
{
qedi_conn->ep->db_data.sq_prod = qedi_conn->ep->fw_sq_prod_idx;
/* wmb - Make sure fw idx is coherent */
wmb();
writel(*(u32 *)&qedi_conn->ep->db_data, qedi_conn->ep->p_doorbell);
/* Make sure fw write idx is coherent, and include both memory barriers
* as a failsafe as for some architectures the call is the same but on
* others they are two different assembly operations.
*/
wmb();
QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_MP_REQ,
"prod_idx=0x%x, fw_prod_idx=0x%x, cid=0x%x\n",
qedi_conn->ep->sq_prod_idx, qedi_conn->ep->fw_sq_prod_idx,
qedi_conn->iscsi_conn_id);
}
static u16 qedi_get_wqe_idx(struct qedi_conn *qedi_conn)
{
struct qedi_endpoint *ep;
u16 rval;
ep = qedi_conn->ep;
rval = ep->sq_prod_idx;
/* Increament SQ index */
ep->sq_prod_idx++;
ep->fw_sq_prod_idx++;
if (ep->sq_prod_idx == QEDI_SQ_SIZE)
ep->sq_prod_idx = 0;
return rval;
}
int qedi_send_iscsi_login(struct qedi_conn *qedi_conn,
struct iscsi_task *task)
{
struct iscsi_login_req_hdr login_req_pdu_header;
struct scsi_sgl_task_params tx_sgl_task_params;
struct scsi_sgl_task_params rx_sgl_task_params;
struct iscsi_task_params task_params;
struct iscsi_task_context *fw_task_ctx;
struct qedi_ctx *qedi = qedi_conn->qedi;
struct iscsi_login_req *login_hdr;
struct scsi_sge *resp_sge = NULL;
struct qedi_cmd *qedi_cmd;
struct qedi_endpoint *ep;
s16 tid = 0;
u16 sq_idx = 0;
int rval = 0;
resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
qedi_cmd = (struct qedi_cmd *)task->dd_data;
ep = qedi_conn->ep;
login_hdr = (struct iscsi_login_req *)task->hdr;
tid = qedi_get_task_idx(qedi);
if (tid == -1)
return -ENOMEM;
fw_task_ctx =
(struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
tid);
memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
qedi_cmd->task_id = tid;
memset(&task_params, 0, sizeof(task_params));
memset(&login_req_pdu_header, 0, sizeof(login_req_pdu_header));
memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
/* Update header info */
login_req_pdu_header.opcode = login_hdr->opcode;
login_req_pdu_header.version_min = login_hdr->min_version;
login_req_pdu_header.version_max = login_hdr->max_version;
login_req_pdu_header.flags_attr = login_hdr->flags;
login_req_pdu_header.isid_tabc = swab32p((u32 *)login_hdr->isid);
login_req_pdu_header.isid_d = swab16p((u16 *)&login_hdr->isid[4]);
login_req_pdu_header.tsih = login_hdr->tsih;
login_req_pdu_header.hdr_second_dword = ntoh24(login_hdr->dlength);
qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
login_req_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
login_req_pdu_header.cid = qedi_conn->iscsi_conn_id;
login_req_pdu_header.cmd_sn = be32_to_cpu(login_hdr->cmdsn);
login_req_pdu_header.exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
login_req_pdu_header.exp_stat_sn = 0;
/* Fill tx AHS and rx buffer */
tx_sgl_task_params.sgl =
(struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
tx_sgl_task_params.sgl_phys_addr.lo =
(u32)(qedi_conn->gen_pdu.req_dma_addr);
tx_sgl_task_params.sgl_phys_addr.hi =
(u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
tx_sgl_task_params.total_buffer_size = ntoh24(login_hdr->dlength);
tx_sgl_task_params.num_sges = 1;
rx_sgl_task_params.sgl =
(struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
rx_sgl_task_params.sgl_phys_addr.lo =
(u32)(qedi_conn->gen_pdu.resp_dma_addr);
rx_sgl_task_params.sgl_phys_addr.hi =
(u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
rx_sgl_task_params.num_sges = 1;
/* Fill fw input params */
task_params.context = fw_task_ctx;
task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
task_params.itid = tid;
task_params.cq_rss_number = 0;
task_params.tx_io_size = ntoh24(login_hdr->dlength);
task_params.rx_io_size = resp_sge->sge_len;
sq_idx = qedi_get_wqe_idx(qedi_conn);
task_params.sqe = &ep->sq[sq_idx];
memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
rval = init_initiator_login_request_task(&task_params,
&login_req_pdu_header,
&tx_sgl_task_params,
&rx_sgl_task_params);
if (rval)
return -1;
spin_lock(&qedi_conn->list_lock);
list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
qedi_cmd->io_cmd_in_list = true;
qedi_conn->active_cmd_count++;
spin_unlock(&qedi_conn->list_lock);
qedi_ring_doorbell(qedi_conn);
return 0;
}
int qedi_send_iscsi_logout(struct qedi_conn *qedi_conn,
struct iscsi_task *task)
{
struct iscsi_logout_req_hdr logout_pdu_header;
struct scsi_sgl_task_params tx_sgl_task_params;
struct scsi_sgl_task_params rx_sgl_task_params;
struct iscsi_task_params task_params;
struct iscsi_task_context *fw_task_ctx;
struct iscsi_logout *logout_hdr = NULL;
struct qedi_ctx *qedi = qedi_conn->qedi;
struct qedi_cmd *qedi_cmd;
struct qedi_endpoint *ep;
s16 tid = 0;
u16 sq_idx = 0;
int rval = 0;
qedi_cmd = (struct qedi_cmd *)task->dd_data;
logout_hdr = (struct iscsi_logout *)task->hdr;
ep = qedi_conn->ep;
tid = qedi_get_task_idx(qedi);
if (tid == -1)
return -ENOMEM;
fw_task_ctx =
(struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
tid);
memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
qedi_cmd->task_id = tid;
memset(&task_params, 0, sizeof(task_params));
memset(&logout_pdu_header, 0, sizeof(logout_pdu_header));
memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
/* Update header info */
logout_pdu_header.opcode = logout_hdr->opcode;
logout_pdu_header.reason_code = 0x80 | logout_hdr->flags;
qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
logout_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
logout_pdu_header.exp_stat_sn = be32_to_cpu(logout_hdr->exp_statsn);
logout_pdu_header.cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
logout_pdu_header.cid = qedi_conn->iscsi_conn_id;
/* Fill fw input params */
task_params.context = fw_task_ctx;
task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
task_params.itid = tid;
task_params.cq_rss_number = 0;
task_params.tx_io_size = 0;
task_params.rx_io_size = 0;
sq_idx = qedi_get_wqe_idx(qedi_conn);
task_params.sqe = &ep->sq[sq_idx];
memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
rval = init_initiator_logout_request_task(&task_params,
&logout_pdu_header,
NULL, NULL);
if (rval)
return -1;
spin_lock(&qedi_conn->list_lock);
list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
qedi_cmd->io_cmd_in_list = true;
qedi_conn->active_cmd_count++;
spin_unlock(&qedi_conn->list_lock);
qedi_ring_doorbell(qedi_conn);
return 0;
}
int qedi_cleanup_all_io(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
struct iscsi_task *task, bool in_recovery)
{
int rval;
struct iscsi_task *ctask;
struct qedi_cmd *cmd, *cmd_tmp;
struct iscsi_tm *tmf_hdr;
unsigned int lun = 0;
bool lun_reset = false;
struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
struct iscsi_session *session = conn->session;
/* From recovery, task is NULL or from tmf resp valid task */
if (task) {
tmf_hdr = (struct iscsi_tm *)task->hdr;
if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) {
lun_reset = true;
lun = scsilun_to_int(&tmf_hdr->lun);
}
}
qedi_conn->cmd_cleanup_req = 0;
atomic_set(&qedi_conn->cmd_cleanup_cmpl, 0);
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
"active_cmd_count=%d, cid=0x%x, in_recovery=%d, lun_reset=%d\n",
qedi_conn->active_cmd_count, qedi_conn->iscsi_conn_id,
in_recovery, lun_reset);
if (lun_reset)
spin_lock_bh(&session->back_lock);
spin_lock(&qedi_conn->list_lock);
list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
io_cmd) {
ctask = cmd->task;
if (ctask == task)
continue;
if (lun_reset) {
if (cmd->scsi_cmd && cmd->scsi_cmd->device) {
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
"tid=0x%x itt=0x%x scsi_cmd_ptr=%p device=%p task_state=%d cmd_state=0%x cid=0x%x\n",
cmd->task_id, get_itt(ctask->itt),
cmd->scsi_cmd, cmd->scsi_cmd->device,
ctask->state, cmd->state,
qedi_conn->iscsi_conn_id);
if (cmd->scsi_cmd->device->lun != lun)
continue;
}
}
qedi_conn->cmd_cleanup_req++;
qedi_iscsi_cleanup_task(ctask, true);
cmd->io_cmd_in_list = false;
list_del_init(&cmd->io_cmd);
qedi_conn->active_cmd_count--;
QEDI_WARN(&qedi->dbg_ctx,
"Deleted active cmd list node io_cmd=%p, cid=0x%x\n",
&cmd->io_cmd, qedi_conn->iscsi_conn_id);
}
spin_unlock(&qedi_conn->list_lock);
if (lun_reset)
spin_unlock_bh(&session->back_lock);
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
"cmd_cleanup_req=%d, cid=0x%x\n",
qedi_conn->cmd_cleanup_req,
qedi_conn->iscsi_conn_id);
rval = wait_event_interruptible_timeout(qedi_conn->wait_queue,
(qedi_conn->cmd_cleanup_req ==
atomic_read(&qedi_conn->cmd_cleanup_cmpl)) ||
test_bit(QEDI_IN_RECOVERY, &qedi->flags),
5 * HZ);
if (rval) {
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
"i/o cmd_cleanup_req=%d, equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
qedi_conn->cmd_cleanup_req,
atomic_read(&qedi_conn->cmd_cleanup_cmpl),
qedi_conn->iscsi_conn_id);
return 0;
}
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
"i/o cmd_cleanup_req=%d, not equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
qedi_conn->cmd_cleanup_req,
atomic_read(&qedi_conn->cmd_cleanup_cmpl),
qedi_conn->iscsi_conn_id);
iscsi_host_for_each_session(qedi->shost,
qedi_mark_device_missing);
qedi_ops->common->drain(qedi->cdev);
/* Enable IOs for all other sessions except current.*/
if (!wait_event_interruptible_timeout(qedi_conn->wait_queue,
(qedi_conn->cmd_cleanup_req ==
atomic_read(&qedi_conn->cmd_cleanup_cmpl)) ||
test_bit(QEDI_IN_RECOVERY, &qedi->flags),
5 * HZ)) {
iscsi_host_for_each_session(qedi->shost,
qedi_mark_device_available);
return -1;
}
iscsi_host_for_each_session(qedi->shost,
qedi_mark_device_available);
return 0;
}
void qedi_clearsq(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
struct iscsi_task *task)
{
struct qedi_endpoint *qedi_ep;
int rval;
qedi_ep = qedi_conn->ep;
qedi_conn->cmd_cleanup_req = 0;
atomic_set(&qedi_conn->cmd_cleanup_cmpl, 0);
if (!qedi_ep) {
QEDI_WARN(&qedi->dbg_ctx,
"Cannot proceed, ep already disconnected, cid=0x%x\n",
qedi_conn->iscsi_conn_id);
return;
}
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
"Clearing SQ for cid=0x%x, conn=%p, ep=%p\n",
qedi_conn->iscsi_conn_id, qedi_conn, qedi_ep);
qedi_ops->clear_sq(qedi->cdev, qedi_ep->handle);
rval = qedi_cleanup_all_io(qedi, qedi_conn, task, true);
if (rval) {
QEDI_ERR(&qedi->dbg_ctx,
"fatal error, need hard reset, cid=0x%x\n",
qedi_conn->iscsi_conn_id);
WARN_ON(1);
}
}
static int qedi_wait_for_cleanup_request(struct qedi_ctx *qedi,
struct qedi_conn *qedi_conn,
struct iscsi_task *task,
struct qedi_cmd *qedi_cmd,
struct qedi_work_map *list_work)
{
struct qedi_cmd *cmd = (struct qedi_cmd *)task->dd_data;
int wait;
wait = wait_event_interruptible_timeout(qedi_conn->wait_queue,
((qedi_cmd->state ==
CLEANUP_RECV) ||
((qedi_cmd->type == TYPEIO) &&
(cmd->state ==
RESPONSE_RECEIVED))),
5 * HZ);
if (!wait) {
qedi_cmd->state = CLEANUP_WAIT_FAILED;
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
"Cleanup timedout tid=0x%x, issue connection recovery, cid=0x%x\n",
cmd->task_id, qedi_conn->iscsi_conn_id);
return -1;
}
return 0;
}
static void qedi_abort_work(struct work_struct *work)
{
struct qedi_cmd *qedi_cmd =
container_of(work, struct qedi_cmd, tmf_work);
struct qedi_conn *qedi_conn = qedi_cmd->conn;
struct qedi_ctx *qedi = qedi_conn->qedi;
struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
struct qedi_work_map *list_work = NULL;
struct iscsi_task *mtask;
struct qedi_cmd *cmd;
struct iscsi_task *ctask;
struct iscsi_tm *tmf_hdr;
s16 rval = 0;
mtask = qedi_cmd->task;
tmf_hdr = (struct iscsi_tm *)mtask->hdr;
spin_lock_bh(&conn->session->back_lock);
ctask = iscsi_itt_to_ctask(conn, tmf_hdr->rtt);
if (!ctask) {
spin_unlock_bh(&conn->session->back_lock);
QEDI_ERR(&qedi->dbg_ctx, "Invalid RTT. Letting abort timeout.\n");
goto clear_cleanup;
}
if (iscsi_task_is_completed(ctask)) {
spin_unlock_bh(&conn->session->back_lock);
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
"Task already completed\n");
/*
* We have to still send the TMF because libiscsi needs the
* response to avoid a timeout.
*/
goto send_tmf;
}
spin_unlock_bh(&conn->session->back_lock);
cmd = (struct qedi_cmd *)ctask->dd_data;
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
"Abort tmf rtt=0x%x, cmd itt=0x%x, cmd tid=0x%x, cid=0x%x\n",
get_itt(tmf_hdr->rtt), get_itt(ctask->itt), cmd->task_id,
qedi_conn->iscsi_conn_id);
if (qedi_do_not_recover) {
QEDI_ERR(&qedi->dbg_ctx, "DONT SEND CLEANUP/ABORT %d\n",
qedi_do_not_recover);
goto clear_cleanup;
}
list_work = kzalloc(sizeof(*list_work), GFP_NOIO);
if (!list_work) {
QEDI_ERR(&qedi->dbg_ctx, "Memory allocation failed\n");
goto clear_cleanup;
}
qedi_cmd->type = TYPEIO;
qedi_cmd->state = CLEANUP_WAIT;
list_work->qedi_cmd = qedi_cmd;
list_work->rtid = cmd->task_id;
list_work->state = QEDI_WORK_SCHEDULED;
list_work->ctask = ctask;
qedi_cmd->list_tmf_work = list_work;
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
"Queue tmf work=%p, list node=%p, cid=0x%x, tmf flags=0x%x\n",
list_work->ptr_tmf_work, list_work, qedi_conn->iscsi_conn_id,
tmf_hdr->flags);
spin_lock_bh(&qedi_conn->tmf_work_lock);
list_add_tail(&list_work->list, &qedi_conn->tmf_work_list);
spin_unlock_bh(&qedi_conn->tmf_work_lock);
qedi_iscsi_cleanup_task(ctask, false);
rval = qedi_wait_for_cleanup_request(qedi, qedi_conn, ctask, qedi_cmd,
list_work);
if (rval == -1) {
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
"FW cleanup got escalated, cid=0x%x\n",
qedi_conn->iscsi_conn_id);
goto ldel_exit;
}
send_tmf:
send_iscsi_tmf(qedi_conn, qedi_cmd->task, ctask);
goto clear_cleanup;
ldel_exit:
spin_lock_bh(&qedi_conn->tmf_work_lock);
if (qedi_cmd->list_tmf_work) {
list_del_init(&list_work->list);
qedi_cmd->list_tmf_work = NULL;
kfree(list_work);
}
spin_unlock_bh(&qedi_conn->tmf_work_lock);
spin_lock(&qedi_conn->list_lock);
if (likely(cmd->io_cmd_in_list)) {
cmd->io_cmd_in_list = false;
list_del_init(&cmd->io_cmd);
qedi_conn->active_cmd_count--;
}
spin_unlock(&qedi_conn->list_lock);
clear_cleanup:
spin_lock(&qedi_conn->tmf_work_lock);
qedi_conn->fw_cleanup_works--;
spin_unlock(&qedi_conn->tmf_work_lock);
}
static int send_iscsi_tmf(struct qedi_conn *qedi_conn, struct iscsi_task *mtask,
struct iscsi_task *ctask)
{
struct iscsi_tmf_request_hdr tmf_pdu_header;
struct iscsi_task_params task_params;
struct qedi_ctx *qedi = qedi_conn->qedi;
struct iscsi_task_context *fw_task_ctx;
struct iscsi_tm *tmf_hdr;
struct qedi_cmd *qedi_cmd;
struct qedi_cmd *cmd;
struct qedi_endpoint *ep;
u32 scsi_lun[2];
s16 tid = 0;
u16 sq_idx = 0;
tmf_hdr = (struct iscsi_tm *)mtask->hdr;
qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
ep = qedi_conn->ep;
if (!ep)
return -ENODEV;
tid = qedi_get_task_idx(qedi);
if (tid == -1)
return -ENOMEM;
fw_task_ctx =
(struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
tid);
memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
qedi_cmd->task_id = tid;
memset(&task_params, 0, sizeof(task_params));
memset(&tmf_pdu_header, 0, sizeof(tmf_pdu_header));
/* Update header info */
qedi_update_itt_map(qedi, tid, mtask->itt, qedi_cmd);
tmf_pdu_header.itt = qedi_set_itt(tid, get_itt(mtask->itt));
tmf_pdu_header.cmd_sn = be32_to_cpu(tmf_hdr->cmdsn);
memcpy(scsi_lun, &tmf_hdr->lun, sizeof(struct scsi_lun));
tmf_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
tmf_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
ISCSI_TM_FUNC_ABORT_TASK) {
cmd = (struct qedi_cmd *)ctask->dd_data;
tmf_pdu_header.rtt =
qedi_set_itt(cmd->task_id,
get_itt(tmf_hdr->rtt));
} else {
tmf_pdu_header.rtt = ISCSI_RESERVED_TAG;
}
tmf_pdu_header.opcode = tmf_hdr->opcode;
tmf_pdu_header.function = tmf_hdr->flags;
tmf_pdu_header.hdr_second_dword = ntoh24(tmf_hdr->dlength);
tmf_pdu_header.ref_cmd_sn = be32_to_cpu(tmf_hdr->refcmdsn);
/* Fill fw input params */
task_params.context = fw_task_ctx;
task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
task_params.itid = tid;
task_params.cq_rss_number = 0;
task_params.tx_io_size = 0;
task_params.rx_io_size = 0;
sq_idx = qedi_get_wqe_idx(qedi_conn);
task_params.sqe = &ep->sq[sq_idx];
memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
init_initiator_tmf_request_task(&task_params, &tmf_pdu_header);
spin_lock(&qedi_conn->list_lock);
list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
qedi_cmd->io_cmd_in_list = true;
qedi_conn->active_cmd_count++;
spin_unlock(&qedi_conn->list_lock);
qedi_ring_doorbell(qedi_conn);
return 0;
}
int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn, struct iscsi_task *mtask)
{
struct iscsi_tm *tmf_hdr = (struct iscsi_tm *)mtask->hdr;
struct qedi_cmd *qedi_cmd = mtask->dd_data;
struct qedi_ctx *qedi = qedi_conn->qedi;
int rc = 0;
switch (tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) {
case ISCSI_TM_FUNC_ABORT_TASK:
spin_lock(&qedi_conn->tmf_work_lock);
qedi_conn->fw_cleanup_works++;
spin_unlock(&qedi_conn->tmf_work_lock);
INIT_WORK(&qedi_cmd->tmf_work, qedi_abort_work);
queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
break;
case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET:
case ISCSI_TM_FUNC_TARGET_WARM_RESET:
case ISCSI_TM_FUNC_TARGET_COLD_RESET:
rc = send_iscsi_tmf(qedi_conn, mtask, NULL);
break;
default:
QEDI_ERR(&qedi->dbg_ctx, "Invalid tmf, cid=0x%x\n",
qedi_conn->iscsi_conn_id);
return -EINVAL;
}
return rc;
}
int qedi_send_iscsi_text(struct qedi_conn *qedi_conn,
struct iscsi_task *task)
{
struct iscsi_text_request_hdr text_request_pdu_header;
struct scsi_sgl_task_params tx_sgl_task_params;
struct scsi_sgl_task_params rx_sgl_task_params;
struct iscsi_task_params task_params;
struct iscsi_task_context *fw_task_ctx;
struct qedi_ctx *qedi = qedi_conn->qedi;
struct iscsi_text *text_hdr;
struct scsi_sge *req_sge = NULL;
struct scsi_sge *resp_sge = NULL;
struct qedi_cmd *qedi_cmd;
struct qedi_endpoint *ep;
s16 tid = 0;
u16 sq_idx = 0;
int rval = 0;
req_sge = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
qedi_cmd = (struct qedi_cmd *)task->dd_data;
text_hdr = (struct iscsi_text *)task->hdr;
ep = qedi_conn->ep;
tid = qedi_get_task_idx(qedi);
if (tid == -1)
return -ENOMEM;
fw_task_ctx =
(struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
tid);
memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
qedi_cmd->task_id = tid;
memset(&task_params, 0, sizeof(task_params));
memset(&text_request_pdu_header, 0, sizeof(text_request_pdu_header));
memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
/* Update header info */
text_request_pdu_header.opcode = text_hdr->opcode;
text_request_pdu_header.flags_attr = text_hdr->flags;
qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
text_request_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
text_request_pdu_header.ttt = text_hdr->ttt;
text_request_pdu_header.cmd_sn = be32_to_cpu(text_hdr->cmdsn);
text_request_pdu_header.exp_stat_sn = be32_to_cpu(text_hdr->exp_statsn);
text_request_pdu_header.hdr_second_dword = ntoh24(text_hdr->dlength);
/* Fill tx AHS and rx buffer */
tx_sgl_task_params.sgl =
(struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
tx_sgl_task_params.sgl_phys_addr.lo =
(u32)(qedi_conn->gen_pdu.req_dma_addr);
tx_sgl_task_params.sgl_phys_addr.hi =
(u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
tx_sgl_task_params.total_buffer_size = req_sge->sge_len;
tx_sgl_task_params.num_sges = 1;
rx_sgl_task_params.sgl =
(struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
rx_sgl_task_params.sgl_phys_addr.lo =
(u32)(qedi_conn->gen_pdu.resp_dma_addr);
rx_sgl_task_params.sgl_phys_addr.hi =
(u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
rx_sgl_task_params.num_sges = 1;
/* Fill fw input params */
task_params.context = fw_task_ctx;
task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
task_params.itid = tid;
task_params.cq_rss_number = 0;
task_params.tx_io_size = ntoh24(text_hdr->dlength);
task_params.rx_io_size = resp_sge->sge_len;
sq_idx = qedi_get_wqe_idx(qedi_conn);
task_params.sqe = &ep->sq[sq_idx];
memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
rval = init_initiator_text_request_task(&task_params,
&text_request_pdu_header,
&tx_sgl_task_params,
&rx_sgl_task_params);
if (rval)
return -1;
spin_lock(&qedi_conn->list_lock);
list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
qedi_cmd->io_cmd_in_list = true;
qedi_conn->active_cmd_count++;
spin_unlock(&qedi_conn->list_lock);
qedi_ring_doorbell(qedi_conn);
return 0;
}
int qedi_send_iscsi_nopout(struct qedi_conn *qedi_conn,
struct iscsi_task *task,
char *datap, int data_len, int unsol)
{
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_params task_params;
struct qedi_ctx *qedi = qedi_conn->qedi;
struct iscsi_task_context *fw_task_ctx;
struct iscsi_nopout *nopout_hdr;
struct scsi_sge *resp_sge = NULL;
struct qedi_cmd *qedi_cmd;
struct qedi_endpoint *ep;
u32 scsi_lun[2];
s16 tid = 0;
u16 sq_idx = 0;
int rval = 0;
resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
qedi_cmd = (struct qedi_cmd *)task->dd_data;
nopout_hdr = (struct iscsi_nopout *)task->hdr;
ep = qedi_conn->ep;
tid = qedi_get_task_idx(qedi);
if (tid == -1)
return -ENOMEM;
fw_task_ctx =
(struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
tid);
memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
qedi_cmd->task_id = tid;
memset(&task_params, 0, sizeof(task_params));
memset(&nop_out_pdu_header, 0, sizeof(nop_out_pdu_header));
memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
/* Update header info */
nop_out_pdu_header.opcode = nopout_hdr->opcode;
SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_CONST1, 1);
SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_RSRV, 0);
memcpy(scsi_lun, &nopout_hdr->lun, sizeof(struct scsi_lun));
nop_out_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
nop_out_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
nop_out_pdu_header.cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
nop_out_pdu_header.exp_stat_sn = be32_to_cpu(nopout_hdr->exp_statsn);
qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
if (nopout_hdr->ttt != ISCSI_TTT_ALL_ONES) {
nop_out_pdu_header.itt = be32_to_cpu(nopout_hdr->itt);
nop_out_pdu_header.ttt = be32_to_cpu(nopout_hdr->ttt);
} else {
nop_out_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
nop_out_pdu_header.ttt = ISCSI_TTT_ALL_ONES;
spin_lock(&qedi_conn->list_lock);
list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
qedi_cmd->io_cmd_in_list = true;
qedi_conn->active_cmd_count++;
spin_unlock(&qedi_conn->list_lock);
}
/* Fill tx AHS and rx buffer */
if (data_len) {
tx_sgl_task_params.sgl =
(struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
tx_sgl_task_params.sgl_phys_addr.lo =
(u32)(qedi_conn->gen_pdu.req_dma_addr);
tx_sgl_task_params.sgl_phys_addr.hi =
(u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
tx_sgl_task_params.total_buffer_size = data_len;
tx_sgl_task_params.num_sges = 1;
rx_sgl_task_params.sgl =
(struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
rx_sgl_task_params.sgl_phys_addr.lo =
(u32)(qedi_conn->gen_pdu.resp_dma_addr);
rx_sgl_task_params.sgl_phys_addr.hi =
(u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
rx_sgl_task_params.num_sges = 1;
}
/* Fill fw input params */
task_params.context = fw_task_ctx;
task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
task_params.itid = tid;
task_params.cq_rss_number = 0;
task_params.tx_io_size = data_len;
task_params.rx_io_size = resp_sge->sge_len;
sq_idx = qedi_get_wqe_idx(qedi_conn);
task_params.sqe = &ep->sq[sq_idx];
memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
rval = init_initiator_nop_out_task(&task_params,
&nop_out_pdu_header,
&tx_sgl_task_params,
&rx_sgl_task_params);
if (rval)
return -1;
qedi_ring_doorbell(qedi_conn);
return 0;
}
static int qedi_split_bd(struct qedi_cmd *cmd, u64 addr, int sg_len,
int bd_index)
{
struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
int frag_size, sg_frags;
sg_frags = 0;
while (sg_len) {
if (addr % QEDI_PAGE_SIZE)
frag_size =
(QEDI_PAGE_SIZE - (addr % QEDI_PAGE_SIZE));
else
frag_size = (sg_len > QEDI_BD_SPLIT_SZ) ? 0 :
(sg_len % QEDI_BD_SPLIT_SZ);
if (frag_size == 0)
frag_size = QEDI_BD_SPLIT_SZ;
bd[bd_index + sg_frags].sge_addr.lo = (addr & 0xffffffff);
bd[bd_index + sg_frags].sge_addr.hi = (addr >> 32);
bd[bd_index + sg_frags].sge_len = (u16)frag_size;
QEDI_INFO(&cmd->conn->qedi->dbg_ctx, QEDI_LOG_IO,
"split sge %d: addr=%llx, len=%x",
(bd_index + sg_frags), addr, frag_size);
addr += (u64)frag_size;
sg_frags++;
sg_len -= frag_size;
}
return sg_frags;
}
static int qedi_map_scsi_sg(struct qedi_ctx *qedi, struct qedi_cmd *cmd)
{
struct scsi_cmnd *sc = cmd->scsi_cmd;
struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
struct scatterlist *sg;
int byte_count = 0;
int bd_count = 0;
int sg_count;
int sg_len;
int sg_frags;
u64 addr, end_addr;
int i;
WARN_ON(scsi_sg_count(sc) > QEDI_ISCSI_MAX_BDS_PER_CMD);
sg_count = dma_map_sg(&qedi->pdev->dev, scsi_sglist(sc),
scsi_sg_count(sc), sc->sc_data_direction);
/*
* New condition to send single SGE as cached-SGL.
* Single SGE with length less than 64K.
*/
sg = scsi_sglist(sc);
if ((sg_count == 1) && (sg_dma_len(sg) <= MAX_SGLEN_FOR_CACHESGL)) {
sg_len = sg_dma_len(sg);
addr = (u64)sg_dma_address(sg);
bd[bd_count].sge_addr.lo = (addr & 0xffffffff);
bd[bd_count].sge_addr.hi = (addr >> 32);
bd[bd_count].sge_len = (u16)sg_len;
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
"single-cached-sgl: bd_count:%d addr=%llx, len=%x",
sg_count, addr, sg_len);
return ++bd_count;
}
scsi_for_each_sg(sc, sg, sg_count, i) {
sg_len = sg_dma_len(sg);
addr = (u64)sg_dma_address(sg);
end_addr = (addr + sg_len);
/*
* first sg elem in the 'list',
* check if end addr is page-aligned.
*/
if ((i == 0) && (sg_count > 1) && (end_addr % QEDI_PAGE_SIZE))
cmd->use_slowpath = true;
/*
* last sg elem in the 'list',
* check if start addr is page-aligned.
*/
else if ((i == (sg_count - 1)) &&
(sg_count > 1) && (addr % QEDI_PAGE_SIZE))
cmd->use_slowpath = true;
/*
* middle sg elements in list,
* check if start and end addr is page-aligned
*/
else if ((i != 0) && (i != (sg_count - 1)) &&
((addr % QEDI_PAGE_SIZE) ||
(end_addr % QEDI_PAGE_SIZE)))
cmd->use_slowpath = true;
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "sg[%d] size=0x%x",
i, sg_len);
if (sg_len > QEDI_BD_SPLIT_SZ) {
sg_frags = qedi_split_bd(cmd, addr, sg_len, bd_count);
} else {
sg_frags = 1;
bd[bd_count].sge_addr.lo = addr & 0xffffffff;
bd[bd_count].sge_addr.hi = addr >> 32;
bd[bd_count].sge_len = sg_len;
}
byte_count += sg_len;
bd_count += sg_frags;
}
if (byte_count != scsi_bufflen(sc))
QEDI_ERR(&qedi->dbg_ctx,
"byte_count = %d != scsi_bufflen = %d\n", byte_count,
scsi_bufflen(sc));
else
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "byte_count = %d\n",
byte_count);
WARN_ON(byte_count != scsi_bufflen(sc));
return bd_count;
}
static void qedi_iscsi_map_sg_list(struct qedi_cmd *cmd)
{
int bd_count;
struct scsi_cmnd *sc = cmd->scsi_cmd;
if (scsi_sg_count(sc)) {
bd_count = qedi_map_scsi_sg(cmd->conn->qedi, cmd);
if (bd_count == 0)
return;
} else {
struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
bd[0].sge_addr.lo = 0;
bd[0].sge_addr.hi = 0;
bd[0].sge_len = 0;
bd_count = 0;
}
cmd->io_tbl.sge_valid = bd_count;
}
static void qedi_cpy_scsi_cdb(struct scsi_cmnd *sc, u32 *dstp)
{
u32 dword;
int lpcnt;
u8 *srcp;
lpcnt = sc->cmd_len / sizeof(dword);
srcp = (u8 *)sc->cmnd;
while (lpcnt--) {
memcpy(&dword, (const void *)srcp, 4);
*dstp = cpu_to_be32(dword);
srcp += 4;
dstp++;
}
if (sc->cmd_len & 0x3) {
dword = (u32)srcp[0] | ((u32)srcp[1] << 8);
*dstp = cpu_to_be32(dword);
}
}
void qedi_trace_io(struct qedi_ctx *qedi, struct iscsi_task *task,
u16 tid, int8_t direction)
{
struct qedi_io_log *io_log;
struct iscsi_conn *conn = task->conn;
struct qedi_conn *qedi_conn = conn->dd_data;
struct scsi_cmnd *sc_cmd = task->sc;
unsigned long flags;
spin_lock_irqsave(&qedi->io_trace_lock, flags);
io_log = &qedi->io_trace_buf[qedi->io_trace_idx];
io_log->direction = direction;
io_log->task_id = tid;
io_log->cid = qedi_conn->iscsi_conn_id;
io_log->lun = sc_cmd->device->lun;
io_log->op = sc_cmd->cmnd[0];
io_log->lba[0] = sc_cmd->cmnd[2];
io_log->lba[1] = sc_cmd->cmnd[3];
io_log->lba[2] = sc_cmd->cmnd[4];
io_log->lba[3] = sc_cmd->cmnd[5];
io_log->bufflen = scsi_bufflen(sc_cmd);
io_log->sg_count = scsi_sg_count(sc_cmd);
io_log->fast_sgs = qedi->fast_sgls;
io_log->cached_sgs = qedi->cached_sgls;
io_log->slow_sgs = qedi->slow_sgls;
io_log->cached_sge = qedi->use_cached_sge;
io_log->slow_sge = qedi->use_slow_sge;
io_log->fast_sge = qedi->use_fast_sge;
io_log->result = sc_cmd->result;
io_log->jiffies = jiffies;
io_log->blk_req_cpu = smp_processor_id();
if (direction == QEDI_IO_TRACE_REQ) {
/* For requests we only care about the submission CPU */
io_log->req_cpu = smp_processor_id() % qedi->num_queues;
io_log->intr_cpu = 0;
io_log->blk_rsp_cpu = 0;
} else if (direction == QEDI_IO_TRACE_RSP) {
io_log->req_cpu = smp_processor_id() % qedi->num_queues;
io_log->intr_cpu = qedi->intr_cpu;
io_log->blk_rsp_cpu = smp_processor_id();
}
qedi->io_trace_idx++;
if (qedi->io_trace_idx == QEDI_IO_TRACE_SIZE)
qedi->io_trace_idx = 0;
qedi->use_cached_sge = false;
qedi->use_slow_sge = false;
qedi->use_fast_sge = false;
spin_unlock_irqrestore(&qedi->io_trace_lock, flags);
}
int qedi_iscsi_send_ioreq(struct iscsi_task *task)
{
struct iscsi_conn *conn = task->conn;
struct iscsi_session *session = conn->session;
struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
struct qedi_ctx *qedi = iscsi_host_priv(shost);
struct qedi_conn *qedi_conn = conn->dd_data;
struct qedi_cmd *cmd = task->dd_data;
struct scsi_cmnd *sc = task->sc;
struct iscsi_cmd_hdr cmd_pdu_header;
struct scsi_sgl_task_params tx_sgl_task_params;
struct scsi_sgl_task_params rx_sgl_task_params;
struct scsi_sgl_task_params *prx_sgl = NULL;
struct scsi_sgl_task_params *ptx_sgl = NULL;
struct iscsi_task_params task_params;
struct iscsi_conn_params conn_params;
struct scsi_initiator_cmd_params cmd_params;
struct iscsi_task_context *fw_task_ctx;
struct iscsi_cls_conn *cls_conn;
struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
enum iscsi_task_type task_type = MAX_ISCSI_TASK_TYPE;
struct qedi_endpoint *ep;
u32 scsi_lun[2];
s16 tid = 0;
u16 sq_idx = 0;
u16 cq_idx;
int rval = 0;
ep = qedi_conn->ep;
cls_conn = qedi_conn->cls_conn;
conn = cls_conn->dd_data;
qedi_iscsi_map_sg_list(cmd);
int_to_scsilun(sc->device->lun, (struct scsi_lun *)scsi_lun);
tid = qedi_get_task_idx(qedi);
if (tid == -1)
return -ENOMEM;
fw_task_ctx =
(struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
tid);
memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
cmd->task_id = tid;
memset(&task_params, 0, sizeof(task_params));
memset(&cmd_pdu_header, 0, sizeof(cmd_pdu_header));
memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
memset(&conn_params, 0, sizeof(conn_params));
memset(&cmd_params, 0, sizeof(cmd_params));
cq_idx = smp_processor_id() % qedi->num_queues;
/* Update header info */
SET_FIELD(cmd_pdu_header.flags_attr, ISCSI_CMD_HDR_ATTR,
ISCSI_ATTR_SIMPLE);
if (hdr->cdb[0] != TEST_UNIT_READY) {
if (sc->sc_data_direction == DMA_TO_DEVICE) {
SET_FIELD(cmd_pdu_header.flags_attr,
ISCSI_CMD_HDR_WRITE, 1);
task_type = ISCSI_TASK_TYPE_INITIATOR_WRITE;
} else {
SET_FIELD(cmd_pdu_header.flags_attr,
ISCSI_CMD_HDR_READ, 1);
task_type = ISCSI_TASK_TYPE_INITIATOR_READ;
}
}
cmd_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
cmd_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
qedi_update_itt_map(qedi, tid, task->itt, cmd);
cmd_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
cmd_pdu_header.expected_transfer_length = cpu_to_be32(hdr->data_length);
cmd_pdu_header.hdr_second_dword = ntoh24(hdr->dlength);
cmd_pdu_header.cmd_sn = be32_to_cpu(hdr->cmdsn);
cmd_pdu_header.hdr_first_byte = hdr->opcode;
qedi_cpy_scsi_cdb(sc, (u32 *)cmd_pdu_header.cdb);
/* Fill tx AHS and rx buffer */
if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) {
tx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
tx_sgl_task_params.sgl_phys_addr.lo =
(u32)(cmd->io_tbl.sge_tbl_dma);
tx_sgl_task_params.sgl_phys_addr.hi =
(u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
tx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
tx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
if (cmd->use_slowpath)
tx_sgl_task_params.small_mid_sge = true;
} else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ) {
rx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
rx_sgl_task_params.sgl_phys_addr.lo =
(u32)(cmd->io_tbl.sge_tbl_dma);
rx_sgl_task_params.sgl_phys_addr.hi =
(u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
rx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
rx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
}
/* Add conn param */
conn_params.first_burst_length = conn->session->first_burst;
conn_params.max_send_pdu_length = conn->max_xmit_dlength;
conn_params.max_burst_length = conn->session->max_burst;
if (conn->session->initial_r2t_en)
conn_params.initial_r2t = true;
if (conn->session->imm_data_en)
conn_params.immediate_data = true;
/* Add cmd params */
cmd_params.sense_data_buffer_phys_addr.lo = (u32)cmd->sense_buffer_dma;
cmd_params.sense_data_buffer_phys_addr.hi =
(u32)((u64)cmd->sense_buffer_dma >> 32);
/* Fill fw input params */
task_params.context = fw_task_ctx;
task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
task_params.itid = tid;
task_params.cq_rss_number = cq_idx;
if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE)
task_params.tx_io_size = scsi_bufflen(sc);
else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ)
task_params.rx_io_size = scsi_bufflen(sc);
sq_idx = qedi_get_wqe_idx(qedi_conn);
task_params.sqe = &ep->sq[sq_idx];
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
"%s: %s-SGL: sg_len=0x%x num_sges=0x%x first-sge-lo=0x%x first-sge-hi=0x%x\n",
(task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) ?
"Write " : "Read ", (cmd->io_tbl.sge_valid == 1) ?
"Single" : (cmd->use_slowpath ? "SLOW" : "FAST"),
(u16)cmd->io_tbl.sge_valid, scsi_bufflen(sc),
(u32)(cmd->io_tbl.sge_tbl_dma),
(u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32));
memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
if (task_params.tx_io_size != 0)
ptx_sgl = &tx_sgl_task_params;
if (task_params.rx_io_size != 0)
prx_sgl = &rx_sgl_task_params;
rval = init_initiator_rw_iscsi_task(&task_params, &conn_params,
&cmd_params, &cmd_pdu_header,
ptx_sgl, prx_sgl,
NULL);
if (rval)
return -1;
spin_lock(&qedi_conn->list_lock);
list_add_tail(&cmd->io_cmd, &qedi_conn->active_cmd_list);
cmd->io_cmd_in_list = true;
qedi_conn->active_cmd_count++;
spin_unlock(&qedi_conn->list_lock);
qedi_ring_doorbell(qedi_conn);
return 0;
}
int qedi_iscsi_cleanup_task(struct iscsi_task *task, bool mark_cmd_node_deleted)
{
struct iscsi_task_params task_params;
struct qedi_endpoint *ep;
struct iscsi_conn *conn = task->conn;
struct qedi_conn *qedi_conn = conn->dd_data;
struct qedi_cmd *cmd = task->dd_data;
u16 sq_idx = 0;
int rval = 0;
QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
"issue cleanup tid=0x%x itt=0x%x task_state=%d cmd_state=0%x cid=0x%x\n",
cmd->task_id, get_itt(task->itt), task->state,
cmd->state, qedi_conn->iscsi_conn_id);
memset(&task_params, 0, sizeof(task_params));
ep = qedi_conn->ep;
sq_idx = qedi_get_wqe_idx(qedi_conn);
task_params.sqe = &ep->sq[sq_idx];
memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
task_params.itid = cmd->task_id;
rval = init_cleanup_task(&task_params);
if (rval)
return rval;
qedi_ring_doorbell(qedi_conn);
return 0;
}
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