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Message-ID: <6f79e92c-ea12-331b-5c20-e9a3587b1d80@suse.de>
Date: Wed, 19 Oct 2016 10:03:08 +0200
From: Hannes Reinecke <hare@...e.de>
To: manish.rangankar@...ium.com, lduncan@...e.com, cleech@...hat.com
Cc: martin.petersen@...cle.com, jejb@...ux.vnet.ibm.com,
linux-scsi@...r.kernel.org, netdev@...r.kernel.org,
Yuval.Mintz@...ium.com, QLogic-Storage-Upstream@...ium.com,
Nilesh Javali <nilesh.javali@...ium.com>,
Adheer Chandravanshi <adheer.chandravanshi@...gic.com>,
Chad Dupuis <chad.dupuis@...ium.com>,
Saurav Kashyap <saurav.kashyap@...ium.com>,
Arun Easi <arun.easi@...ium.com>
Subject: Re: [RFC 5/6] qedi: Add support for iSCSI session management.
On 10/19/2016 07:01 AM, manish.rangankar@...ium.com wrote:
> From: Manish Rangankar <manish.rangankar@...ium.com>
>
> This patch adds support for iscsi_transport LLD Login,
> Logout, NOP-IN/NOP-OUT, Async, Reject PDU processing
> and Firmware async event handling support.
>
> Signed-off-by: Nilesh Javali <nilesh.javali@...ium.com>
> Signed-off-by: Adheer Chandravanshi <adheer.chandravanshi@...gic.com>
> Signed-off-by: Chad Dupuis <chad.dupuis@...ium.com>
> Signed-off-by: Saurav Kashyap <saurav.kashyap@...ium.com>
> Signed-off-by: Arun Easi <arun.easi@...ium.com>
> Signed-off-by: Manish Rangankar <manish.rangankar@...ium.com>
> ---
> drivers/scsi/qedi/qedi_fw.c | 1123 ++++++++++++++++++++++++++++
> drivers/scsi/qedi/qedi_gbl.h | 67 ++
> drivers/scsi/qedi/qedi_iscsi.c | 1604 ++++++++++++++++++++++++++++++++++++++++
> drivers/scsi/qedi/qedi_iscsi.h | 228 ++++++
> drivers/scsi/qedi/qedi_main.c | 164 ++++
> 5 files changed, 3186 insertions(+)
> create mode 100644 drivers/scsi/qedi/qedi_fw.c
> create mode 100644 drivers/scsi/qedi/qedi_gbl.h
> create mode 100644 drivers/scsi/qedi/qedi_iscsi.c
> create mode 100644 drivers/scsi/qedi/qedi_iscsi.h
>
> diff --git a/drivers/scsi/qedi/qedi_fw.c b/drivers/scsi/qedi/qedi_fw.c
> new file mode 100644
> index 0000000..a820785
> --- /dev/null
> +++ b/drivers/scsi/qedi/qedi_fw.c
> @@ -0,0 +1,1123 @@
> +/*
> + * QLogic iSCSI Offload Driver
> + * Copyright (c) 2016 Cavium Inc.
> + *
> + * This software is available under the terms of the GNU General Public License
> + * (GPL) Version 2, available from the file COPYING in the main directory of
> + * this source tree.
> + */
> +
> +#include <linux/blkdev.h>
> +#include <scsi/scsi_tcq.h>
> +#include <linux/delay.h>
> +
> +#include "qedi.h"
> +#include "qedi_iscsi.h"
> +#include "qedi_gbl.h"
> +
> +static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn,
> + struct iscsi_task *mtask);
> +
> +void qedi_iscsi_unmap_sg_list(struct qedi_cmd *cmd)
> +{
> + struct scsi_cmnd *sc = cmd->scsi_cmd;
> +
> + if (cmd->io_tbl.sge_valid && sc) {
> + scsi_dma_unmap(sc);
> + cmd->io_tbl.sge_valid = 0;
> + }
> +}
> +
> +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->time2wait);
> + resp_hdr->t2retain = cpu_to_be32(cqe_logout_response->time2retain);
> +
> + 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);
> +
> + 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);
> + }
> +
> + cmd->state = RESPONSE_RECEIVED;
> + qedi_clear_task_idx(qedi, cmd->task_id);
> + __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;
> + u32 *tmp;
> +
> + cmd = (struct qedi_cmd *)task->dd_data;
> + task_ctx = (struct iscsi_task_context *)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));
> + tmp = (u32 *)resp_hdr_ptr->dlength;
> +
> + 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);
> +
> + 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);
> + }
> +
> + cmd->state = RESPONSE_RECEIVED;
> + qedi_clear_task_idx(qedi, cmd->task_id);
> +
> + __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_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;
> + u32 *tmp;
> +
> + cmd = (struct qedi_cmd *)task->dd_data;
> +
> + cqe_login_response = &cqe->cqe_common.iscsi_hdr.login_response;
> + task_ctx = (struct iscsi_task_context *)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));
> + tmp = (u32 *)resp_hdr_ptr->dlength;
> + 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;
> +
> + if (likely(cmd->io_cmd_in_list)) {
> + cmd->io_cmd_in_list = false;
> + list_del_init(&cmd->io_cmd);
> + qedi_conn->active_cmd_count--;
> + }
> +
> + 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;
> + qedi_clear_task_idx(qedi, cmd->task_id);
> +}
> +
> +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.lo;
> + if ((idx < 0) || (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.lo [0x%p], rqe_opaque.hi [0x%p], idx [%d]\n",
> + cqe->rqe_opaque.lo, cqe->rqe_opaque.hi, 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 tmp;
> + u16 idx = 0;
> + struct scsi_bd *pbl;
> +
> + /* Obtain buffer address from rqe_opaque */
> + idx = cqe->rqe_opaque.lo;
> + if ((idx < 0) || (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((u32)(((u64)(qedi->bdq[idx].buf_dma)) >> 32));
> + pbl->address.lo =
> + cpu_to_le32(((u32)(((u64)(qedi->bdq[idx].buf_dma)) &
> + 0xffffffff)));
> + 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.hi = cpu_to_le32((u32)(((u64)0) >> 32));
> + pbl->opaque.lo = cpu_to_le32(((u32)(((u64)idx) & 0xffffffff)));
> +
> + /* 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);
> + tmp = readw(qedi->bdq_primary_prod);
> +
> + writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
> + tmp = 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 scsi_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);
> + scsi_lun[0] = 0xffffffff;
> + scsi_lun[1] = 0xffffffff;
> + memcpy(&hdr->lun, scsi_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);
> + qedi_clear_task_idx(qedi, cmd->task_id);
> + }
> +
> +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 scsi_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;
> +
> + scsi_lun[0] = cpu_to_be32(cqe_async_msg->lun.lo);
> + scsi_lun[1] = cpu_to_be32(cqe_async_msg->lun.hi);
I _think_ we have a SCSI LUN structure ...
> + memcpy(&resp_hdr->lun, scsi_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_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_LOGIN_RESPONSE:
> + qedi_process_login_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;
> + qedi_clear_task_idx(qedi, cmd->task_id);
> +
> + spin_lock_bh(&session->back_lock);
> + __iscsi_put_task(task);
> + spin_unlock_bh(&session->back_lock);
> +}
> +
> +void qedi_fp_process_cqes(struct qedi_ctx *qedi, union iscsi_cqe *cqe,
> + uint16_t que_idx)
> +{
> + struct iscsi_task *task = NULL;
> + struct iscsi_nopout *nopout_hdr;
> + struct qedi_conn *q_conn;
> + struct iscsi_conn *conn;
> + struct iscsi_task_context *fw_task_ctx;
> + u32 comp_type;
> + u32 iscsi_cid;
> + u32 hdr_opcode;
> + u32 ptmp_itt = 0;
> + itt_t proto_itt = 0;
> + 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:
> + fw_task_ctx =
> + (struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
> + cqe->cqe_solicited.itid);
> + if (fw_task_ctx->ystorm_st_context.state.local_comp == 1) {
> + qedi_get_proto_itt(qedi, cqe->cqe_solicited.itid,
> + &ptmp_itt);
> + proto_itt = build_itt(ptmp_itt, conn->session->age);
> + } else {
> + cqe->cqe_solicited.itid =
> + qedi_get_itt(cqe->cqe_solicited);
> + proto_itt = build_itt(cqe->cqe_solicited.itid,
> + conn->session->age);
> + }
> +
> + spin_lock_bh(&conn->session->back_lock);
> + task = iscsi_itt_to_task(conn, proto_itt);
> + spin_unlock_bh(&conn->session->back_lock);
> +
> + 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
> + /* 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;
> + default:
> + QEDI_ERR(&qedi->dbg_ctx, "Error cqe.\n");
> + break;
> + }
> +
> +exit_fp_process:
> + return;
> +}
> +
> +static void qedi_add_to_sq(struct qedi_conn *qedi_conn, struct iscsi_task *task,
> + u16 tid, uint16_t ptu_invalidate, int is_cleanup)
> +{
> + struct iscsi_wqe *wqe;
> + struct iscsi_wqe_field *cont_field;
> + struct qedi_endpoint *ep;
> + struct scsi_cmnd *sc = task->sc;
> + struct iscsi_login_req *login_hdr;
> + struct qedi_cmd *cmd = task->dd_data;
> +
> + login_hdr = (struct iscsi_login_req *)task->hdr;
> + ep = qedi_conn->ep;
> + wqe = &ep->sq[ep->sq_prod_idx];
> +
> + memset(wqe, 0, sizeof(*wqe));
> +
> + ep->sq_prod_idx++;
> + ep->fw_sq_prod_idx++;
> + if (ep->sq_prod_idx == QEDI_SQ_SIZE)
> + ep->sq_prod_idx = 0;
> +
> + if (is_cleanup) {
> + SET_FIELD(wqe->flags, ISCSI_WQE_WQE_TYPE,
> + ISCSI_WQE_TYPE_TASK_CLEANUP);
> + wqe->task_id = tid;
> + return;
> + }
> +
> + if (ptu_invalidate) {
> + SET_FIELD(wqe->flags, ISCSI_WQE_PTU_INVALIDATE,
> + ISCSI_WQE_SET_PTU_INVALIDATE);
> + }
> +
> + cont_field = &wqe->cont_prevtid_union.cont_field;
> +
> + switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
> + case ISCSI_OP_LOGIN:
> + case ISCSI_OP_TEXT:
> + SET_FIELD(wqe->flags, ISCSI_WQE_WQE_TYPE,
> + ISCSI_WQE_TYPE_MIDDLE_PATH);
> + SET_FIELD(wqe->flags, ISCSI_WQE_NUM_FAST_SGES,
> + 1);
> + cont_field->contlen_cdbsize_field = ntoh24(login_hdr->dlength);
> + break;
> + case ISCSI_OP_LOGOUT:
> + case ISCSI_OP_NOOP_OUT:
> + case ISCSI_OP_SCSI_TMFUNC:
> + SET_FIELD(wqe->flags, ISCSI_WQE_WQE_TYPE,
> + ISCSI_WQE_TYPE_NORMAL);
> + break;
> + default:
> + if (!sc)
> + break;
> +
> + SET_FIELD(wqe->flags, ISCSI_WQE_WQE_TYPE,
> + ISCSI_WQE_TYPE_NORMAL);
> + cont_field->contlen_cdbsize_field =
> + (sc->sc_data_direction == DMA_TO_DEVICE) ?
> + scsi_bufflen(sc) : 0;
> + if (cmd->use_slowpath)
> + SET_FIELD(wqe->flags, ISCSI_WQE_NUM_FAST_SGES, 0);
> + else
> + SET_FIELD(wqe->flags, ISCSI_WQE_NUM_FAST_SGES,
> + (sc->sc_data_direction ==
> + DMA_TO_DEVICE) ?
> + min((u16)QEDI_FAST_SGE_COUNT,
> + (u16)cmd->io_tbl.sge_valid) : 0);
> + break;
> + }
> +
> + wqe->task_id = tid;
> + /* Make sure SQ data is coherent */
> + wmb();
> +}
> +
> +static void qedi_ring_doorbell(struct qedi_conn *qedi_conn)
> +{
> + struct iscsi_db_data dbell = { 0 };
> +
> + dbell.agg_flags = 0;
> +
> + dbell.params |= DB_DEST_XCM << ISCSI_DB_DATA_DEST_SHIFT;
> + dbell.params |= DB_AGG_CMD_SET << ISCSI_DB_DATA_AGG_CMD_SHIFT;
> + dbell.params |=
> + DQ_XCM_ISCSI_SQ_PROD_CMD << ISCSI_DB_DATA_AGG_VAL_SEL_SHIFT;
> +
> + dbell.sq_prod = qedi_conn->ep->fw_sq_prod_idx;
> + writel(*(u32 *)&dbell, qedi_conn->ep->p_doorbell);
> + /* Make sure fw idx is coherent */
> + wmb();
> + mmiowb();
> + 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);
> +}
> +
> +int qedi_send_iscsi_login(struct qedi_conn *qedi_conn,
> + struct iscsi_task *task)
> +{
> + struct qedi_ctx *qedi = qedi_conn->qedi;
> + struct iscsi_task_context *fw_task_ctx;
> + struct iscsi_login_req *login_hdr;
> + struct iscsi_login_req_hdr *fw_login_req = NULL;
> + struct iscsi_cached_sge_ctx *cached_sge = NULL;
> + struct iscsi_sge *single_sge = NULL;
> + struct iscsi_sge *req_sge = NULL;
> + struct iscsi_sge *resp_sge = NULL;
> + struct qedi_cmd *qedi_cmd;
> + s16 ptu_invalidate = 0;
> + s16 tid = 0;
> +
> + req_sge = (struct iscsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
> + resp_sge = (struct iscsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
> + qedi_cmd = (struct qedi_cmd *)task->dd_data;
> + 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;
> +
> + /* Ystorm context */
> + fw_login_req = &fw_task_ctx->ystorm_st_context.pdu_hdr.login_req;
> + fw_login_req->opcode = login_hdr->opcode;
> + fw_login_req->version_min = login_hdr->min_version;
> + fw_login_req->version_max = login_hdr->max_version;
> + fw_login_req->flags_attr = login_hdr->flags;
> + fw_login_req->isid_tabc = *((u16 *)login_hdr->isid + 2);
> + fw_login_req->isid_d = *((u32 *)login_hdr->isid);
> + fw_login_req->tsih = login_hdr->tsih;
> + qedi_update_itt_map(qedi, tid, task->itt);
> + fw_login_req->itt = qedi_set_itt(tid, get_itt(task->itt));
> + fw_login_req->cid = qedi_conn->iscsi_conn_id;
> + fw_login_req->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
> + fw_login_req->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
> + fw_login_req->exp_stat_sn = 0;
> +
> + if (qedi->tid_reuse_count[tid] == QEDI_MAX_TASK_NUM) {
> + ptu_invalidate = 1;
> + qedi->tid_reuse_count[tid] = 0;
> + }
> +
> + fw_task_ctx->ystorm_st_context.state.reuse_count =
> + qedi->tid_reuse_count[tid];
> + fw_task_ctx->mstorm_st_context.reuse_count =
> + qedi->tid_reuse_count[tid]++;
> + cached_sge =
> + &fw_task_ctx->ystorm_st_context.state.sgl_ctx_union.cached_sge;
> + cached_sge->sge.sge_len = req_sge->sge_len;
> + cached_sge->sge.sge_addr.lo = (u32)(qedi_conn->gen_pdu.req_dma_addr);
> + cached_sge->sge.sge_addr.hi =
> + (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
> +
> + /* Mstorm context */
> + single_sge = &fw_task_ctx->mstorm_st_context.sgl_union.single_sge;
> + fw_task_ctx->mstorm_st_context.task_type = 0x2;
> + fw_task_ctx->mstorm_ag_context.task_cid = (u16)qedi_conn->iscsi_conn_id;
> + single_sge->sge_addr.lo = resp_sge->sge_addr.lo;
> + single_sge->sge_addr.hi = resp_sge->sge_addr.hi;
> + single_sge->sge_len = resp_sge->sge_len;
> +
> + SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
> + ISCSI_MFLAGS_SINGLE_SGE, 1);
> + SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
> + ISCSI_MFLAGS_SLOW_IO, 0);
> + fw_task_ctx->mstorm_st_context.sgl_size = 1;
> + fw_task_ctx->mstorm_st_context.rem_task_size = resp_sge->sge_len;
> +
> + /* Ustorm context */
> + fw_task_ctx->ustorm_st_context.rem_rcv_len = resp_sge->sge_len;
> + fw_task_ctx->ustorm_st_context.exp_data_transfer_len =
> + ntoh24(login_hdr->dlength);
> + fw_task_ctx->ustorm_st_context.exp_data_sn = 0;
> + fw_task_ctx->ustorm_st_context.cq_rss_number = 0;
> + fw_task_ctx->ustorm_st_context.task_type = 0x2;
> + fw_task_ctx->ustorm_ag_context.icid = (u16)qedi_conn->iscsi_conn_id;
> + fw_task_ctx->ustorm_ag_context.exp_data_acked =
> + ntoh24(login_hdr->dlength);
> + SET_FIELD(fw_task_ctx->ustorm_ag_context.flags1,
> + USTORM_ISCSI_TASK_AG_CTX_R2T2RECV, 1);
> + SET_FIELD(fw_task_ctx->ustorm_st_context.flags,
> + USTORM_ISCSI_TASK_ST_CTX_LOCAL_COMP, 0);
> +
> + 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_add_to_sq(qedi_conn, task, tid, ptu_invalidate, false);
> + qedi_ring_doorbell(qedi_conn);
> + return 0;
> +}
> +
> +int qedi_send_iscsi_logout(struct qedi_conn *qedi_conn,
> + struct iscsi_task *task)
> +{
> + struct qedi_ctx *qedi = qedi_conn->qedi;
> + struct iscsi_logout_req_hdr *fw_logout_req = NULL;
> + struct iscsi_task_context *fw_task_ctx = NULL;
> + struct iscsi_logout *logout_hdr = NULL;
> + struct qedi_cmd *qedi_cmd = NULL;
> + s16 tid = 0;
> + s16 ptu_invalidate = 0;
> +
> + qedi_cmd = (struct qedi_cmd *)task->dd_data;
> + logout_hdr = (struct iscsi_logout *)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;
> +
> + /* Ystorm context */
> + fw_logout_req = &fw_task_ctx->ystorm_st_context.pdu_hdr.logout_req;
> + fw_logout_req->opcode = ISCSI_OPCODE_LOGOUT_REQUEST;
> + fw_logout_req->reason_code = 0x80 | logout_hdr->flags;
> + qedi_update_itt_map(qedi, tid, task->itt);
> + fw_logout_req->itt = qedi_set_itt(tid, get_itt(task->itt));
> + fw_logout_req->exp_stat_sn = be32_to_cpu(logout_hdr->exp_statsn);
> + fw_logout_req->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
> +
> + if (qedi->tid_reuse_count[tid] == QEDI_MAX_TASK_NUM) {
> + ptu_invalidate = 1;
> + qedi->tid_reuse_count[tid] = 0;
> + }
> + fw_task_ctx->ystorm_st_context.state.reuse_count =
> + qedi->tid_reuse_count[tid];
> + fw_task_ctx->mstorm_st_context.reuse_count =
> + qedi->tid_reuse_count[tid]++;
> + fw_logout_req->cid = qedi_conn->iscsi_conn_id;
> + fw_task_ctx->ystorm_st_context.state.buffer_offset[0] = 0;
> +
> + /* Mstorm context */
> + fw_task_ctx->mstorm_st_context.task_type = ISCSI_TASK_TYPE_MIDPATH;
> + fw_task_ctx->mstorm_ag_context.task_cid = (u16)qedi_conn->iscsi_conn_id;
> +
> + /* Ustorm context */
> + fw_task_ctx->ustorm_st_context.rem_rcv_len = 0;
> + fw_task_ctx->ustorm_st_context.exp_data_transfer_len = 0;
> + fw_task_ctx->ustorm_st_context.exp_data_sn = 0;
> + fw_task_ctx->ustorm_st_context.task_type = ISCSI_TASK_TYPE_MIDPATH;
> + fw_task_ctx->ustorm_st_context.cq_rss_number = 0;
> +
> + SET_FIELD(fw_task_ctx->ustorm_st_context.flags,
> + USTORM_ISCSI_TASK_ST_CTX_LOCAL_COMP, 0);
> + SET_FIELD(fw_task_ctx->ustorm_st_context.reg1.reg1_map,
> + ISCSI_REG1_NUM_FAST_SGES, 0);
> +
> + fw_task_ctx->ustorm_ag_context.icid = (u16)qedi_conn->iscsi_conn_id;
> + SET_FIELD(fw_task_ctx->ustorm_ag_context.flags1,
> + USTORM_ISCSI_TASK_AG_CTX_R2T2RECV, 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_add_to_sq(qedi_conn, task, tid, ptu_invalidate, false);
> + qedi_ring_doorbell(qedi_conn);
> +
> + return 0;
> +}
> +
> +int qedi_send_iscsi_text(struct qedi_conn *qedi_conn,
> + struct iscsi_task *task)
> +{
> + struct qedi_ctx *qedi = qedi_conn->qedi;
> + struct iscsi_task_context *fw_task_ctx;
> + struct iscsi_text_request_hdr *fw_text_request;
> + struct iscsi_cached_sge_ctx *cached_sge;
> + struct iscsi_sge *single_sge;
> + struct qedi_cmd *qedi_cmd;
> + /* For 6.5 hdr iscsi_hdr */
> + struct iscsi_text *text_hdr;
> + struct iscsi_sge *req_sge;
> + struct iscsi_sge *resp_sge;
> + s16 ptu_invalidate = 0;
> + s16 tid = 0;
> +
> + req_sge = (struct iscsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
> + resp_sge = (struct iscsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
> + qedi_cmd = (struct qedi_cmd *)task->dd_data;
> + text_hdr = (struct iscsi_text *)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;
> +
> + /* Ystorm context */
> + fw_text_request =
> + &fw_task_ctx->ystorm_st_context.pdu_hdr.text_request;
> + fw_text_request->opcode = text_hdr->opcode;
> + fw_text_request->flags_attr = text_hdr->flags;
> +
> + qedi_update_itt_map(qedi, tid, task->itt);
> + fw_text_request->itt = qedi_set_itt(tid, get_itt(task->itt));
> + fw_text_request->ttt = text_hdr->ttt;
> + fw_text_request->cmd_sn = be32_to_cpu(text_hdr->cmdsn);
> + fw_text_request->exp_stat_sn = be32_to_cpu(text_hdr->exp_statsn);
> + fw_text_request->hdr_second_dword = ntoh24(text_hdr->dlength);
> +
> + if (qedi->tid_reuse_count[tid] == QEDI_MAX_TASK_NUM) {
> + ptu_invalidate = 1;
> + qedi->tid_reuse_count[tid] = 0;
> + }
> + fw_task_ctx->ystorm_st_context.state.reuse_count =
> + qedi->tid_reuse_count[tid];
> + fw_task_ctx->mstorm_st_context.reuse_count =
> + qedi->tid_reuse_count[tid]++;
> +
> + cached_sge =
> + &fw_task_ctx->ystorm_st_context.state.sgl_ctx_union.cached_sge;
> + cached_sge->sge.sge_len = req_sge->sge_len;
> + cached_sge->sge.sge_addr.lo = (u32)(qedi_conn->gen_pdu.req_dma_addr);
> + cached_sge->sge.sge_addr.hi =
> + (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
> +
> + /* Mstorm context */
> + single_sge = &fw_task_ctx->mstorm_st_context.sgl_union.single_sge;
> + fw_task_ctx->mstorm_st_context.task_type = 0x2;
> + fw_task_ctx->mstorm_ag_context.task_cid = (u16)qedi_conn->iscsi_conn_id;
> + single_sge->sge_addr.lo = resp_sge->sge_addr.lo;
> + single_sge->sge_addr.hi = resp_sge->sge_addr.hi;
> + single_sge->sge_len = resp_sge->sge_len;
> +
> + SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
> + ISCSI_MFLAGS_SINGLE_SGE, 1);
> + SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
> + ISCSI_MFLAGS_SLOW_IO, 0);
> + fw_task_ctx->mstorm_st_context.sgl_size = 1;
> + fw_task_ctx->mstorm_st_context.rem_task_size = resp_sge->sge_len;
> +
> + /* Ustorm context */
> + fw_task_ctx->ustorm_ag_context.exp_data_acked =
> + ntoh24(text_hdr->dlength);
> + fw_task_ctx->ustorm_st_context.rem_rcv_len = resp_sge->sge_len;
> + fw_task_ctx->ustorm_st_context.exp_data_transfer_len =
> + ntoh24(text_hdr->dlength);
> + fw_task_ctx->ustorm_st_context.exp_data_sn =
> + be32_to_cpu(text_hdr->exp_statsn);
> + fw_task_ctx->ustorm_st_context.cq_rss_number = 0;
> + fw_task_ctx->ustorm_st_context.task_type = 0x2;
> + fw_task_ctx->ustorm_ag_context.icid = (u16)qedi_conn->iscsi_conn_id;
> + SET_FIELD(fw_task_ctx->ustorm_ag_context.flags1,
> + USTORM_ISCSI_TASK_AG_CTX_R2T2RECV, 1);
> +
> + /* Add command in active command list */
> + 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_add_to_sq(qedi_conn, task, tid, ptu_invalidate, false);
> + 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 qedi_ctx *qedi = qedi_conn->qedi;
> + struct iscsi_task_context *fw_task_ctx;
> + struct iscsi_nop_out_hdr *fw_nop_out;
> + struct qedi_cmd *qedi_cmd;
> + /* For 6.5 hdr iscsi_hdr */
> + struct iscsi_nopout *nopout_hdr;
> + struct iscsi_cached_sge_ctx *cached_sge;
> + struct iscsi_sge *single_sge;
> + struct iscsi_sge *req_sge;
> + struct iscsi_sge *resp_sge;
> + u32 scsi_lun[2];
> + s16 ptu_invalidate = 0;
> + s16 tid = 0;
> +
> + req_sge = (struct iscsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
> + resp_sge = (struct iscsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
> + qedi_cmd = (struct qedi_cmd *)task->dd_data;
> + nopout_hdr = (struct iscsi_nopout *)task->hdr;
> +
> + tid = qedi_get_task_idx(qedi);
> + if (tid == -1) {
> + QEDI_WARN(&qedi->dbg_ctx, "Invalid tid\n");
> + 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;
> +
> + /* Ystorm context */
> + fw_nop_out = &fw_task_ctx->ystorm_st_context.pdu_hdr.nop_out;
> + SET_FIELD(fw_nop_out->flags_attr, ISCSI_NOP_OUT_HDR_CONST1, 1);
> + SET_FIELD(fw_nop_out->flags_attr, ISCSI_NOP_OUT_HDR_RSRV, 0);
> +
> + memcpy(scsi_lun, &nopout_hdr->lun, sizeof(struct scsi_lun));
> + fw_nop_out->lun.lo = be32_to_cpu(scsi_lun[0]);
> + fw_nop_out->lun.hi = be32_to_cpu(scsi_lun[1]);
> +
> + qedi_update_itt_map(qedi, tid, task->itt);
> +
> + if (nopout_hdr->ttt != ISCSI_TTT_ALL_ONES) {
> + fw_nop_out->itt = be32_to_cpu(nopout_hdr->itt);
> + fw_nop_out->ttt = be32_to_cpu(nopout_hdr->ttt);
> + fw_task_ctx->ystorm_st_context.state.buffer_offset[0] = 0;
> + fw_task_ctx->ystorm_st_context.state.local_comp = 1;
> + SET_FIELD(fw_task_ctx->ustorm_st_context.flags,
> + USTORM_ISCSI_TASK_ST_CTX_LOCAL_COMP, 1);
> + } else {
> + fw_nop_out->itt = qedi_set_itt(tid, get_itt(task->itt));
> + fw_nop_out->ttt = ISCSI_TTT_ALL_ONES;
> + fw_task_ctx->ystorm_st_context.state.buffer_offset[0] = 0;
> +
> + 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);
> + }
> +
> + fw_nop_out->opcode = ISCSI_OPCODE_NOP_OUT;
> + fw_nop_out->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
> + fw_nop_out->exp_stat_sn = be32_to_cpu(nopout_hdr->exp_statsn);
> +
> + cached_sge =
> + &fw_task_ctx->ystorm_st_context.state.sgl_ctx_union.cached_sge;
> + cached_sge->sge.sge_len = req_sge->sge_len;
> + cached_sge->sge.sge_addr.lo = (u32)(qedi_conn->gen_pdu.req_dma_addr);
> + cached_sge->sge.sge_addr.hi =
> + (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
> +
> + /* Mstorm context */
> + fw_task_ctx->mstorm_st_context.task_type = ISCSI_TASK_TYPE_MIDPATH;
> + fw_task_ctx->mstorm_ag_context.task_cid = (u16)qedi_conn->iscsi_conn_id;
> +
> + single_sge = &fw_task_ctx->mstorm_st_context.sgl_union.single_sge;
> + single_sge->sge_addr.lo = resp_sge->sge_addr.lo;
> + single_sge->sge_addr.hi = resp_sge->sge_addr.hi;
> + single_sge->sge_len = resp_sge->sge_len;
> + fw_task_ctx->mstorm_st_context.rem_task_size = resp_sge->sge_len;
> +
> + if (qedi->tid_reuse_count[tid] == QEDI_MAX_TASK_NUM) {
> + ptu_invalidate = 1;
> + qedi->tid_reuse_count[tid] = 0;
> + }
> + fw_task_ctx->ystorm_st_context.state.reuse_count =
> + qedi->tid_reuse_count[tid];
> + fw_task_ctx->mstorm_st_context.reuse_count =
> + qedi->tid_reuse_count[tid]++;
> + /* Ustorm context */
> + fw_task_ctx->ustorm_st_context.rem_rcv_len = resp_sge->sge_len;
> + fw_task_ctx->ustorm_st_context.exp_data_transfer_len = data_len;
> + fw_task_ctx->ustorm_st_context.exp_data_sn = 0;
> + fw_task_ctx->ustorm_st_context.task_type = ISCSI_TASK_TYPE_MIDPATH;
> + fw_task_ctx->ustorm_st_context.cq_rss_number = 0;
> +
> + SET_FIELD(fw_task_ctx->ustorm_st_context.reg1.reg1_map,
> + ISCSI_REG1_NUM_FAST_SGES, 0);
> +
> + fw_task_ctx->ustorm_ag_context.icid = (u16)qedi_conn->iscsi_conn_id;
> + SET_FIELD(fw_task_ctx->ustorm_ag_context.flags1,
> + USTORM_ISCSI_TASK_AG_CTX_R2T2RECV, 1);
> +
> + fw_task_ctx->ustorm_st_context.lun.lo = be32_to_cpu(scsi_lun[0]);
> + fw_task_ctx->ustorm_st_context.lun.hi = be32_to_cpu(scsi_lun[1]);
> +
> + qedi_add_to_sq(qedi_conn, task, tid, ptu_invalidate, false);
> + qedi_ring_doorbell(qedi_conn);
> + return 0;
> +}
> diff --git a/drivers/scsi/qedi/qedi_gbl.h b/drivers/scsi/qedi/qedi_gbl.h
> new file mode 100644
> index 0000000..85ea3d7
> --- /dev/null
> +++ b/drivers/scsi/qedi/qedi_gbl.h
> @@ -0,0 +1,67 @@
> +/*
> + * QLogic iSCSI Offload Driver
> + * Copyright (c) 2016 Cavium Inc.
> + *
> + * This software is available under the terms of the GNU General Public License
> + * (GPL) Version 2, available from the file COPYING in the main directory of
> + * this source tree.
> + */
> +
> +#ifndef _QEDI_GBL_H_
> +#define _QEDI_GBL_H_
> +
> +#include "qedi_iscsi.h"
> +
> +extern uint io_tracing;
> +extern int do_not_recover;
> +extern struct scsi_host_template qedi_host_template;
> +extern struct iscsi_transport qedi_iscsi_transport;
> +extern const struct qed_iscsi_ops *qedi_ops;
> +extern struct qedi_debugfs_ops qedi_debugfs_ops;
> +extern const struct file_operations qedi_dbg_fops;
> +extern struct device_attribute *qedi_shost_attrs[];
> +
> +int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep);
> +void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep);
> +
> +int qedi_send_iscsi_login(struct qedi_conn *qedi_conn,
> + struct iscsi_task *task);
> +int qedi_send_iscsi_logout(struct qedi_conn *qedi_conn,
> + struct iscsi_task *task);
> +int qedi_send_iscsi_text(struct qedi_conn *qedi_conn,
> + struct iscsi_task *task);
> +int qedi_send_iscsi_nopout(struct qedi_conn *qedi_conn,
> + struct iscsi_task *task,
> + char *datap, int data_len, int unsol);
> +int qedi_get_task_idx(struct qedi_ctx *qedi);
> +void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx);
> +int qedi_iscsi_cleanup_task(struct iscsi_task *task,
> + bool mark_cmd_node_deleted);
> +void qedi_iscsi_unmap_sg_list(struct qedi_cmd *cmd);
> +void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt);
> +void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt);
> +void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, int16_t *tid);
> +void qedi_process_iscsi_error(struct qedi_endpoint *ep,
> + struct async_data *data);
> +void qedi_start_conn_recovery(struct qedi_ctx *qedi,
> + struct qedi_conn *qedi_conn);
> +struct qedi_conn *qedi_get_conn_from_id(struct qedi_ctx *qedi, u32 iscsi_cid);
> +void qedi_process_tcp_error(struct qedi_endpoint *ep, struct async_data *data);
> +void qedi_mark_device_missing(struct iscsi_cls_session *cls_session);
> +void qedi_mark_device_available(struct iscsi_cls_session *cls_session);
> +void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu);
> +int qedi_recover_all_conns(struct qedi_ctx *qedi);
> +void qedi_fp_process_cqes(struct qedi_ctx *qedi, union iscsi_cqe *cqe,
> + uint16_t que_idx);
> +void qedi_trace_io(struct qedi_ctx *qedi, struct iscsi_task *task,
> + u16 tid, int8_t direction);
> +int qedi_alloc_id(struct qedi_portid_tbl *id_tbl, u16 id);
> +u16 qedi_alloc_new_id(struct qedi_portid_tbl *id_tbl);
> +void qedi_free_id(struct qedi_portid_tbl *id_tbl, u16 id);
> +int qedi_create_sysfs_ctx_attr(struct qedi_ctx *qedi);
> +void qedi_remove_sysfs_ctx_attr(struct qedi_ctx *qedi);
> +void qedi_clearsq(struct qedi_ctx *qedi,
> + struct qedi_conn *qedi_conn,
> + struct iscsi_task *task);
> +
> +#endif
> diff --git a/drivers/scsi/qedi/qedi_iscsi.c b/drivers/scsi/qedi/qedi_iscsi.c
> new file mode 100644
> index 0000000..caecdb8
> --- /dev/null
> +++ b/drivers/scsi/qedi/qedi_iscsi.c
> @@ -0,0 +1,1604 @@
> +/*
> + * QLogic iSCSI Offload Driver
> + * Copyright (c) 2016 Cavium Inc.
> + *
> + * This software is available under the terms of the GNU General Public License
> + * (GPL) Version 2, available from the file COPYING in the main directory of
> + * this source tree.
> + */
> +
> +#include <linux/blkdev.h>
> +#include <linux/etherdevice.h>
> +#include <linux/if_ether.h>
> +#include <linux/if_vlan.h>
> +#include <scsi/scsi_tcq.h>
> +
> +#include "qedi.h"
> +#include "qedi_iscsi.h"
> +#include "qedi_gbl.h"
> +
> +int qedi_recover_all_conns(struct qedi_ctx *qedi)
> +{
> + struct qedi_conn *qedi_conn;
> + int i;
> +
> + for (i = 0; i < qedi->max_active_conns; i++) {
> + qedi_conn = qedi_get_conn_from_id(qedi, i);
> + if (!qedi_conn)
> + continue;
> +
> + qedi_start_conn_recovery(qedi, qedi_conn);
> + }
> +
> + return SUCCESS;
> +}
> +
> +static int qedi_eh_host_reset(struct scsi_cmnd *cmd)
> +{
> + struct Scsi_Host *shost = cmd->device->host;
> + struct qedi_ctx *qedi;
> +
> + qedi = (struct qedi_ctx *)iscsi_host_priv(shost);
> +
> + return qedi_recover_all_conns(qedi);
> +}
> +
> +struct scsi_host_template qedi_host_template = {
> + .module = THIS_MODULE,
> + .name = "QLogic QEDI 25/40/100Gb iSCSI Initiator Driver",
> + .proc_name = QEDI_MODULE_NAME,
> + .queuecommand = iscsi_queuecommand,
> + .eh_abort_handler = iscsi_eh_abort,
> + .eh_device_reset_handler = iscsi_eh_device_reset,
> + .eh_target_reset_handler = iscsi_eh_recover_target,
> + .eh_host_reset_handler = qedi_eh_host_reset,
> + .target_alloc = iscsi_target_alloc,
> + .change_queue_depth = scsi_change_queue_depth,
> + .can_queue = QEDI_MAX_ISCSI_TASK,
> + .this_id = -1,
> + .sg_tablesize = QEDI_ISCSI_MAX_BDS_PER_CMD,
> + .max_sectors = 0xffff,
> + .cmd_per_lun = 128,
> + .use_clustering = ENABLE_CLUSTERING,
> + .shost_attrs = qedi_shost_attrs,
> +};
> +
> +static void qedi_conn_free_login_resources(struct qedi_ctx *qedi,
> + struct qedi_conn *qedi_conn)
> +{
> + if (qedi_conn->gen_pdu.resp_bd_tbl) {
> + dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
> + qedi_conn->gen_pdu.resp_bd_tbl,
> + qedi_conn->gen_pdu.resp_bd_dma);
> + qedi_conn->gen_pdu.resp_bd_tbl = NULL;
> + }
> +
> + if (qedi_conn->gen_pdu.req_bd_tbl) {
> + dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
> + qedi_conn->gen_pdu.req_bd_tbl,
> + qedi_conn->gen_pdu.req_bd_dma);
> + qedi_conn->gen_pdu.req_bd_tbl = NULL;
> + }
> +
> + if (qedi_conn->gen_pdu.resp_buf) {
> + dma_free_coherent(&qedi->pdev->dev,
> + ISCSI_DEF_MAX_RECV_SEG_LEN,
> + qedi_conn->gen_pdu.resp_buf,
> + qedi_conn->gen_pdu.resp_dma_addr);
> + qedi_conn->gen_pdu.resp_buf = NULL;
> + }
> +
> + if (qedi_conn->gen_pdu.req_buf) {
> + dma_free_coherent(&qedi->pdev->dev,
> + ISCSI_DEF_MAX_RECV_SEG_LEN,
> + qedi_conn->gen_pdu.req_buf,
> + qedi_conn->gen_pdu.req_dma_addr);
> + qedi_conn->gen_pdu.req_buf = NULL;
> + }
> +}
> +
> +static int qedi_conn_alloc_login_resources(struct qedi_ctx *qedi,
> + struct qedi_conn *qedi_conn)
> +{
> + qedi_conn->gen_pdu.req_buf =
> + dma_alloc_coherent(&qedi->pdev->dev,
> + ISCSI_DEF_MAX_RECV_SEG_LEN,
> + &qedi_conn->gen_pdu.req_dma_addr,
> + GFP_KERNEL);
> + if (!qedi_conn->gen_pdu.req_buf)
> + goto login_req_buf_failure;
> +
> + qedi_conn->gen_pdu.req_buf_size = 0;
> + qedi_conn->gen_pdu.req_wr_ptr = qedi_conn->gen_pdu.req_buf;
> +
> + qedi_conn->gen_pdu.resp_buf =
> + dma_alloc_coherent(&qedi->pdev->dev,
> + ISCSI_DEF_MAX_RECV_SEG_LEN,
> + &qedi_conn->gen_pdu.resp_dma_addr,
> + GFP_KERNEL);
> + if (!qedi_conn->gen_pdu.resp_buf)
> + goto login_resp_buf_failure;
> +
> + qedi_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
> + qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf;
> +
> + qedi_conn->gen_pdu.req_bd_tbl =
> + dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
> + &qedi_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
> + if (!qedi_conn->gen_pdu.req_bd_tbl)
> + goto login_req_bd_tbl_failure;
> +
> + qedi_conn->gen_pdu.resp_bd_tbl =
> + dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
> + &qedi_conn->gen_pdu.resp_bd_dma,
> + GFP_KERNEL);
> + if (!qedi_conn->gen_pdu.resp_bd_tbl)
> + goto login_resp_bd_tbl_failure;
> +
> + QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SESS,
> + "Allocation successful, cid=0x%x\n",
> + qedi_conn->iscsi_conn_id);
> + return 0;
> +
> +login_resp_bd_tbl_failure:
> + dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
> + qedi_conn->gen_pdu.req_bd_tbl,
> + qedi_conn->gen_pdu.req_bd_dma);
> + qedi_conn->gen_pdu.req_bd_tbl = NULL;
> +
> +login_req_bd_tbl_failure:
> + dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
> + qedi_conn->gen_pdu.resp_buf,
> + qedi_conn->gen_pdu.resp_dma_addr);
> + qedi_conn->gen_pdu.resp_buf = NULL;
> +login_resp_buf_failure:
> + dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
> + qedi_conn->gen_pdu.req_buf,
> + qedi_conn->gen_pdu.req_dma_addr);
> + qedi_conn->gen_pdu.req_buf = NULL;
> +login_req_buf_failure:
> + iscsi_conn_printk(KERN_ERR, qedi_conn->cls_conn->dd_data,
> + "login resource alloc failed!!\n");
> + return -ENOMEM;
> +}
> +
> +static void qedi_destroy_cmd_pool(struct qedi_ctx *qedi,
> + struct iscsi_session *session)
> +{
> + int i;
> +
> + for (i = 0; i < session->cmds_max; i++) {
> + struct iscsi_task *task = session->cmds[i];
> + struct qedi_cmd *cmd = task->dd_data;
> +
> + if (cmd->io_tbl.sge_tbl)
> + dma_free_coherent(&qedi->pdev->dev,
> + QEDI_ISCSI_MAX_BDS_PER_CMD *
> + sizeof(struct iscsi_sge),
> + cmd->io_tbl.sge_tbl,
> + cmd->io_tbl.sge_tbl_dma);
> +
> + if (cmd->sense_buffer)
> + dma_free_coherent(&qedi->pdev->dev,
> + SCSI_SENSE_BUFFERSIZE,
> + cmd->sense_buffer,
> + cmd->sense_buffer_dma);
> + }
> +}
> +
> +static int qedi_alloc_sget(struct qedi_ctx *qedi, struct iscsi_session *session,
> + struct qedi_cmd *cmd)
> +{
> + struct qedi_io_bdt *io = &cmd->io_tbl;
> + struct iscsi_sge *sge;
> +
> + io->sge_tbl = dma_alloc_coherent(&qedi->pdev->dev,
> + QEDI_ISCSI_MAX_BDS_PER_CMD *
> + sizeof(*sge),
> + &io->sge_tbl_dma, GFP_KERNEL);
> + if (!io->sge_tbl) {
> + iscsi_session_printk(KERN_ERR, session,
> + "Could not allocate BD table.\n");
> + return -ENOMEM;
> + }
> +
> + io->sge_valid = 0;
> + return 0;
> +}
> +
> +static int qedi_setup_cmd_pool(struct qedi_ctx *qedi,
> + struct iscsi_session *session)
> +{
> + int i;
> +
> + for (i = 0; i < session->cmds_max; i++) {
> + struct iscsi_task *task = session->cmds[i];
> + struct qedi_cmd *cmd = task->dd_data;
> +
> + task->hdr = &cmd->hdr;
> + task->hdr_max = sizeof(struct iscsi_hdr);
> +
> + if (qedi_alloc_sget(qedi, session, cmd))
> + goto free_sgets;
> +
> + cmd->sense_buffer = dma_alloc_coherent(&qedi->pdev->dev,
> + SCSI_SENSE_BUFFERSIZE,
> + &cmd->sense_buffer_dma,
> + GFP_KERNEL);
> + if (!cmd->sense_buffer)
> + goto free_sgets;
> + }
> +
> + return 0;
> +
> +free_sgets:
> + qedi_destroy_cmd_pool(qedi, session);
> + return -ENOMEM;
> +}
> +
> +static struct iscsi_cls_session *
> +qedi_session_create(struct iscsi_endpoint *ep, u16 cmds_max,
> + u16 qdepth, uint32_t initial_cmdsn)
> +{
> + struct Scsi_Host *shost;
> + struct iscsi_cls_session *cls_session;
> + struct qedi_ctx *qedi;
> + struct qedi_endpoint *qedi_ep;
> +
> + if (!ep)
> + return NULL;
> +
> + qedi_ep = ep->dd_data;
> + shost = qedi_ep->qedi->shost;
> + qedi = iscsi_host_priv(shost);
> +
> + if (cmds_max > qedi->max_sqes)
> + cmds_max = qedi->max_sqes;
> + else if (cmds_max < QEDI_SQ_WQES_MIN)
> + cmds_max = QEDI_SQ_WQES_MIN;
> +
> + cls_session = iscsi_session_setup(&qedi_iscsi_transport, shost,
> + cmds_max, 0, sizeof(struct qedi_cmd),
> + initial_cmdsn, ISCSI_MAX_TARGET);
> + if (!cls_session) {
> + QEDI_ERR(&qedi->dbg_ctx,
> + "Failed to setup session for ep=%p\n", qedi_ep);
> + return NULL;
> + }
> +
> + if (qedi_setup_cmd_pool(qedi, cls_session->dd_data)) {
> + QEDI_ERR(&qedi->dbg_ctx,
> + "Failed to setup cmd pool for ep=%p\n", qedi_ep);
> + goto session_teardown;
> + }
> +
> + return cls_session;
> +
> +session_teardown:
> + iscsi_session_teardown(cls_session);
> + return NULL;
> +}
> +
> +static void qedi_session_destroy(struct iscsi_cls_session *cls_session)
> +{
> + struct iscsi_session *session = cls_session->dd_data;
> + struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
> + struct qedi_ctx *qedi = iscsi_host_priv(shost);
> +
> + qedi_destroy_cmd_pool(qedi, session);
> + iscsi_session_teardown(cls_session);
> +}
> +
> +static struct iscsi_cls_conn *
> +qedi_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
> +{
> + struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
> + struct qedi_ctx *qedi = iscsi_host_priv(shost);
> + struct iscsi_cls_conn *cls_conn;
> + struct qedi_conn *qedi_conn;
> + struct iscsi_conn *conn;
> +
> + cls_conn = iscsi_conn_setup(cls_session, sizeof(*qedi_conn),
> + cid);
> + if (!cls_conn) {
> + QEDI_ERR(&qedi->dbg_ctx,
> + "conn_new: iscsi conn setup failed, cid=0x%x, cls_sess=%p!\n",
> + cid, cls_session);
> + return NULL;
> + }
> +
> + conn = cls_conn->dd_data;
> + qedi_conn = conn->dd_data;
> + qedi_conn->cls_conn = cls_conn;
> + qedi_conn->qedi = qedi;
> + qedi_conn->ep = NULL;
> + qedi_conn->active_cmd_count = 0;
> + INIT_LIST_HEAD(&qedi_conn->active_cmd_list);
> + spin_lock_init(&qedi_conn->list_lock);
> +
> + if (qedi_conn_alloc_login_resources(qedi, qedi_conn)) {
> + iscsi_conn_printk(KERN_ALERT, conn,
> + "conn_new: login resc alloc failed, cid=0x%x, cls_sess=%p!!\n",
> + cid, cls_session);
> + goto free_conn;
> + }
> +
> + return cls_conn;
> +
> +free_conn:
> + iscsi_conn_teardown(cls_conn);
> + return NULL;
> +}
> +
> +void qedi_mark_device_missing(struct iscsi_cls_session *cls_session)
> +{
> + iscsi_block_session(cls_session);
> +}
> +
> +void qedi_mark_device_available(struct iscsi_cls_session *cls_session)
> +{
> + iscsi_unblock_session(cls_session);
> +}
> +
> +static int qedi_bind_conn_to_iscsi_cid(struct qedi_ctx *qedi,
> + struct qedi_conn *qedi_conn)
> +{
> + u32 iscsi_cid = qedi_conn->iscsi_conn_id;
> +
> + if (qedi->cid_que.conn_cid_tbl[iscsi_cid]) {
> + iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data,
> + "conn bind - entry #%d not free\n",
> + iscsi_cid);
> + return -EBUSY;
> + }
> +
> + qedi->cid_que.conn_cid_tbl[iscsi_cid] = qedi_conn;
> + return 0;
> +}
> +
> +struct qedi_conn *qedi_get_conn_from_id(struct qedi_ctx *qedi, u32 iscsi_cid)
> +{
> + if (!qedi->cid_que.conn_cid_tbl) {
> + QEDI_ERR(&qedi->dbg_ctx, "missing conn<->cid table\n");
> + return NULL;
> +
> + } else if (iscsi_cid >= qedi->max_active_conns) {
> + QEDI_ERR(&qedi->dbg_ctx, "wrong cid #%d\n", iscsi_cid);
> + return NULL;
> + }
> + return qedi->cid_que.conn_cid_tbl[iscsi_cid];
> +}
> +
> +static int qedi_conn_bind(struct iscsi_cls_session *cls_session,
> + struct iscsi_cls_conn *cls_conn,
> + u64 transport_fd, int is_leading)
> +{
> + struct iscsi_conn *conn = cls_conn->dd_data;
> + struct qedi_conn *qedi_conn = conn->dd_data;
> + struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
> + struct qedi_ctx *qedi = iscsi_host_priv(shost);
> + struct qedi_endpoint *qedi_ep;
> + struct iscsi_endpoint *ep;
> +
> + ep = iscsi_lookup_endpoint(transport_fd);
> + if (!ep)
> + return -EINVAL;
> +
> + qedi_ep = ep->dd_data;
> + if ((qedi_ep->state == EP_STATE_TCP_FIN_RCVD) ||
> + (qedi_ep->state == EP_STATE_TCP_RST_RCVD))
> + return -EINVAL;
> +
> + if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
> + return -EINVAL;
> +
> + qedi_ep->conn = qedi_conn;
> + qedi_conn->ep = qedi_ep;
> + qedi_conn->iscsi_conn_id = qedi_ep->iscsi_cid;
> + qedi_conn->fw_cid = qedi_ep->fw_cid;
> + qedi_conn->cmd_cleanup_req = 0;
> + qedi_conn->cmd_cleanup_cmpl = 0;
> +
> + if (qedi_bind_conn_to_iscsi_cid(qedi, qedi_conn))
> + return -EINVAL;
> +
> + spin_lock_init(&qedi_conn->tmf_work_lock);
> + INIT_LIST_HEAD(&qedi_conn->tmf_work_list);
> + init_waitqueue_head(&qedi_conn->wait_queue);
> + return 0;
> +}
> +
> +static int qedi_iscsi_update_conn(struct qedi_ctx *qedi,
> + struct qedi_conn *qedi_conn)
> +{
> + struct qed_iscsi_params_update *conn_info;
> + struct iscsi_cls_conn *cls_conn = qedi_conn->cls_conn;
> + struct iscsi_conn *conn = cls_conn->dd_data;
> + struct qedi_endpoint *qedi_ep;
> + int rval;
> +
> + qedi_ep = qedi_conn->ep;
> +
> + conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL);
> + if (!conn_info) {
> + QEDI_ERR(&qedi->dbg_ctx, "memory alloc failed\n");
> + return -ENOMEM;
> + }
> +
> + conn_info->update_flag = 0;
> +
> + if (conn->hdrdgst_en)
> + SET_FIELD(conn_info->update_flag,
> + ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, true);
> + if (conn->datadgst_en)
> + SET_FIELD(conn_info->update_flag,
> + ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, true);
> + if (conn->session->initial_r2t_en)
> + SET_FIELD(conn_info->update_flag,
> + ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T,
> + true);
> + if (conn->session->imm_data_en)
> + SET_FIELD(conn_info->update_flag,
> + ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA,
> + true);
> +
> + conn_info->max_seq_size = conn->session->max_burst;
> + conn_info->max_recv_pdu_length = conn->max_recv_dlength;
> + conn_info->max_send_pdu_length = conn->max_xmit_dlength;
> + conn_info->first_seq_length = conn->session->first_burst;
> + conn_info->exp_stat_sn = conn->exp_statsn;
> +
> + rval = qedi_ops->update_conn(qedi->cdev, qedi_ep->handle,
> + conn_info);
> + if (rval) {
> + rval = -ENXIO;
> + QEDI_ERR(&qedi->dbg_ctx, "Could not update connection\n");
> + goto update_conn_err;
> + }
> +
> + kfree(conn_info);
> + rval = 0;
> +
> +update_conn_err:
> + return rval;
> +}
> +
> +static u16 qedi_calc_mss(u16 pmtu, u8 is_ipv6, u8 tcp_ts_en, u8 vlan_en)
> +{
> + u16 mss = 0;
> + u16 hdrs = TCP_HDR_LEN;
> +
> + if (is_ipv6)
> + hdrs += IPV6_HDR_LEN;
> + else
> + hdrs += IPV4_HDR_LEN;
> +
> + if (vlan_en)
> + hdrs += VLAN_LEN;
> +
> + mss = pmtu - hdrs;
> +
> + if (tcp_ts_en)
> + mss -= TCP_OPTION_LEN;
> +
> + if (!mss)
> + mss = DEF_MSS;
> +
> + return mss;
> +}
> +
> +static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep)
> +{
> + struct qedi_ctx *qedi = qedi_ep->qedi;
> + struct qed_iscsi_params_offload *conn_info;
> + int rval;
> + int i;
> +
> + conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL);
> + if (!conn_info) {
> + QEDI_ERR(&qedi->dbg_ctx,
> + "Failed to allocate memory ep=%p\n", qedi_ep);
> + return -ENOMEM;
> + }
> +
> + ether_addr_copy(conn_info->src.mac, qedi_ep->src_mac);
> + ether_addr_copy(conn_info->dst.mac, qedi_ep->dst_mac);
> +
> + conn_info->src.ip[0] = ntohl(qedi_ep->src_addr[0]);
> + conn_info->dst.ip[0] = ntohl(qedi_ep->dst_addr[0]);
> +
> + if (qedi_ep->ip_type == TCP_IPV4) {
> + conn_info->ip_version = 0;
> + QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
> + "After ntohl: src_addr=%pI4, dst_addr=%pI4\n",
> + qedi_ep->src_addr, qedi_ep->dst_addr);
> + } else {
> + for (i = 1; i < 4; i++) {
> + conn_info->src.ip[i] = ntohl(qedi_ep->src_addr[i]);
> + conn_info->dst.ip[i] = ntohl(qedi_ep->dst_addr[i]);
> + }
> +
> + conn_info->ip_version = 1;
> + QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
> + "After ntohl: src_addr=%pI6, dst_addr=%pI6\n",
> + qedi_ep->src_addr, qedi_ep->dst_addr);
> + }
> +
> + conn_info->src.port = qedi_ep->src_port;
> + conn_info->dst.port = qedi_ep->dst_port;
> +
> + conn_info->layer_code = ISCSI_SLOW_PATH_LAYER_CODE;
> + conn_info->sq_pbl_addr = qedi_ep->sq_pbl_dma;
> + conn_info->vlan_id = qedi_ep->vlan_id;
> +
> + SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_TS_EN, 1);
> + SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_EN, 1);
> + SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_CNT_EN, 1);
> + SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_KA_EN, 1);
> +
> + conn_info->default_cq = (qedi_ep->fw_cid % 8);
> +
> + conn_info->ka_max_probe_cnt = DEF_KA_MAX_PROBE_COUNT;
> + conn_info->dup_ack_theshold = 3;
> + conn_info->rcv_wnd = 65535;
> + conn_info->cwnd = DEF_MAX_CWND;
> +
> + conn_info->ss_thresh = 65535;
> + conn_info->srtt = 300;
> + conn_info->rtt_var = 150;
> + conn_info->flow_label = 0;
> + conn_info->ka_timeout = DEF_KA_TIMEOUT;
> + conn_info->ka_interval = DEF_KA_INTERVAL;
> + conn_info->max_rt_time = DEF_MAX_RT_TIME;
> + conn_info->ttl = DEF_TTL;
> + conn_info->tos_or_tc = DEF_TOS;
> + conn_info->remote_port = qedi_ep->dst_port;
> + conn_info->local_port = qedi_ep->src_port;
> +
> + conn_info->mss = qedi_calc_mss(qedi_ep->pmtu,
> + (qedi_ep->ip_type == TCP_IPV6),
> + 1, (qedi_ep->vlan_id != 0));
> +
> + conn_info->rcv_wnd_scale = 4;
> + conn_info->ts_ticks_per_second = 1000;
> + conn_info->da_timeout_value = 200;
> + conn_info->ack_frequency = 2;
> +
> + QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
> + "Default cq index [%d], mss [%d]\n",
> + conn_info->default_cq, conn_info->mss);
> +
> + rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info);
> + if (rval)
> + QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n",
> + rval, qedi_ep);
> +
> + kfree(conn_info);
> + return rval;
> +}
> +
> +static int qedi_conn_start(struct iscsi_cls_conn *cls_conn)
> +{
> + struct iscsi_conn *conn = cls_conn->dd_data;
> + struct qedi_conn *qedi_conn = conn->dd_data;
> + struct qedi_ctx *qedi;
> + int rval;
> +
> + qedi = qedi_conn->qedi;
> +
> + rval = qedi_iscsi_update_conn(qedi, qedi_conn);
> + if (rval) {
> + iscsi_conn_printk(KERN_ALERT, conn,
> + "conn_start: FW oflload conn failed.\n");
> + rval = -EINVAL;
> + goto start_err;
> + }
> +
> + clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
> + qedi_conn->abrt_conn = 0;
> +
> + rval = iscsi_conn_start(cls_conn);
> + if (rval) {
> + iscsi_conn_printk(KERN_ALERT, conn,
> + "iscsi_conn_start: FW oflload conn failed!!\n");
> + }
> +
> +start_err:
> + return rval;
> +}
> +
> +static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn)
> +{
> + struct iscsi_conn *conn = cls_conn->dd_data;
> + struct qedi_conn *qedi_conn = conn->dd_data;
> + struct Scsi_Host *shost;
> + struct qedi_ctx *qedi;
> +
> + shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
> + qedi = iscsi_host_priv(shost);
> +
> + qedi_conn_free_login_resources(qedi, qedi_conn);
> + iscsi_conn_teardown(cls_conn);
> +}
> +
> +static int qedi_ep_get_param(struct iscsi_endpoint *ep,
> + enum iscsi_param param, char *buf)
> +{
> + struct qedi_endpoint *qedi_ep = ep->dd_data;
> + int len;
> +
> + if (!qedi_ep)
> + return -ENOTCONN;
> +
> + switch (param) {
> + case ISCSI_PARAM_CONN_PORT:
> + len = sprintf(buf, "%hu\n", qedi_ep->dst_port);
> + break;
> + case ISCSI_PARAM_CONN_ADDRESS:
> + if (qedi_ep->ip_type == TCP_IPV4)
> + len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr);
> + else
> + len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr);
> + break;
> + default:
> + return -ENOTCONN;
> + }
> +
> + return len;
> +}
> +
> +static int qedi_host_get_param(struct Scsi_Host *shost,
> + enum iscsi_host_param param, char *buf)
> +{
> + struct qedi_ctx *qedi;
> + int len;
> +
> + qedi = iscsi_host_priv(shost);
> +
> + switch (param) {
> + case ISCSI_HOST_PARAM_HWADDRESS:
> + len = sysfs_format_mac(buf, qedi->mac, 6);
> + break;
> + case ISCSI_HOST_PARAM_NETDEV_NAME:
> + len = sprintf(buf, "host%d\n", shost->host_no);
> + break;
> + case ISCSI_HOST_PARAM_IPADDRESS:
> + if (qedi->ip_type == TCP_IPV4)
> + len = sprintf(buf, "%pI4\n", qedi->src_ip);
> + else
> + len = sprintf(buf, "%pI6\n", qedi->src_ip);
> + break;
> + default:
> + return iscsi_host_get_param(shost, param, buf);
> + }
> +
> + return len;
> +}
> +
> +static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
> + struct iscsi_stats *stats)
> +{
> + struct iscsi_conn *conn = cls_conn->dd_data;
> + struct qed_iscsi_stats iscsi_stats;
> + struct Scsi_Host *shost;
> + struct qedi_ctx *qedi;
> +
> + shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
> + qedi = iscsi_host_priv(shost);
> + qedi_ops->get_stats(qedi->cdev, &iscsi_stats);
> +
> + conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt;
> + conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt;
> + conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt;
> + conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt;
> + conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt;
> +
> + stats->txdata_octets = conn->txdata_octets;
> + stats->rxdata_octets = conn->rxdata_octets;
> + stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
> + stats->dataout_pdus = conn->dataout_pdus_cnt;
> + stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
> + stats->datain_pdus = conn->datain_pdus_cnt;
> + stats->r2t_pdus = conn->r2t_pdus_cnt;
> + stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
> + stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
> + stats->digest_err = 0;
> + stats->timeout_err = 0;
> + strcpy(stats->custom[0].desc, "eh_abort_cnt");
> + stats->custom[0].value = conn->eh_abort_cnt;
> + stats->custom_length = 1;
> +}
> +
> +static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn)
> +{
> + struct iscsi_sge *bd_tbl;
> +
> + bd_tbl = (struct iscsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
> +
> + bd_tbl->sge_addr.hi =
> + (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
> + bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr;
> + bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr -
> + qedi_conn->gen_pdu.req_buf;
> + bd_tbl->reserved0 = 0;
> + bd_tbl = (struct iscsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
> + bd_tbl->sge_addr.hi =
> + (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
> + bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr;
> + bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN;
> + bd_tbl->reserved0 = 0;
> +}
> +
> +static int qedi_iscsi_send_generic_request(struct iscsi_task *task)
> +{
> + struct qedi_cmd *cmd = task->dd_data;
> + struct qedi_conn *qedi_conn = cmd->conn;
> + char *buf;
> + int data_len;
> + int rc = 0;
> +
> + qedi_iscsi_prep_generic_pdu_bd(qedi_conn);
> + switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
> + case ISCSI_OP_LOGIN:
> + qedi_send_iscsi_login(qedi_conn, task);
> + break;
> + case ISCSI_OP_NOOP_OUT:
> + data_len = qedi_conn->gen_pdu.req_buf_size;
> + buf = qedi_conn->gen_pdu.req_buf;
> + if (data_len)
> + rc = qedi_send_iscsi_nopout(qedi_conn, task,
> + buf, data_len, 1);
> + else
> + rc = qedi_send_iscsi_nopout(qedi_conn, task,
> + NULL, 0, 1);
> + break;
> + case ISCSI_OP_LOGOUT:
> + rc = qedi_send_iscsi_logout(qedi_conn, task);
> + break;
> + case ISCSI_OP_TEXT:
> + rc = qedi_send_iscsi_text(qedi_conn, task);
> + break;
> + default:
> + iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data,
> + "unsupported op 0x%x\n", task->hdr->opcode);
> + }
> +
> + return rc;
> +}
> +
> +static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
> +{
> + struct qedi_conn *qedi_conn = conn->dd_data;
> + struct qedi_cmd *cmd = task->dd_data;
> +
> + memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
> +
> + qedi_conn->gen_pdu.req_buf_size = task->data_count;
> +
> + if (task->data_count) {
> + memcpy(qedi_conn->gen_pdu.req_buf, task->data,
> + task->data_count);
> + qedi_conn->gen_pdu.req_wr_ptr =
> + qedi_conn->gen_pdu.req_buf + task->data_count;
> + }
> +
> + cmd->conn = conn->dd_data;
> + cmd->scsi_cmd = NULL;
> + return qedi_iscsi_send_generic_request(task);
> +}
> +
> +static int qedi_task_xmit(struct iscsi_task *task)
> +{
> + struct iscsi_conn *conn = task->conn;
> + struct qedi_conn *qedi_conn = conn->dd_data;
> + struct qedi_cmd *cmd = task->dd_data;
> + struct scsi_cmnd *sc = task->sc;
> +
> + cmd->state = 0;
> + cmd->task = NULL;
> + cmd->use_slowpath = false;
> + cmd->conn = qedi_conn;
> + cmd->task = task;
> + cmd->io_cmd_in_list = false;
> + INIT_LIST_HEAD(&cmd->io_cmd);
> +
> + if (!sc)
> + return qedi_mtask_xmit(conn, task);
> +}
> +
> +static struct iscsi_endpoint *
> +qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
> + int non_blocking)
> +{
> + struct qedi_ctx *qedi;
> + struct iscsi_endpoint *ep;
> + struct qedi_endpoint *qedi_ep;
> + struct sockaddr_in *addr;
> + struct sockaddr_in6 *addr6;
> + struct qed_dev *cdev = NULL;
> + struct qedi_uio_dev *udev = NULL;
> + struct iscsi_path path_req;
> + u32 msg_type = ISCSI_KEVENT_IF_DOWN;
> + u32 iscsi_cid = QEDI_CID_RESERVED;
> + u16 len = 0;
> + char *buf = NULL;
> + int ret;
> +
> + if (!shost) {
> + ret = -ENXIO;
> + QEDI_ERR(NULL, "shost is NULL\n");
> + return ERR_PTR(ret);
> + }
> +
> + if (do_not_recover) {
> + ret = -ENOMEM;
> + return ERR_PTR(ret);
> + }
> +
> + qedi = iscsi_host_priv(shost);
> + cdev = qedi->cdev;
> + udev = qedi->udev;
> +
> + if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) ||
> + test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
> + ret = -ENOMEM;
> + return ERR_PTR(ret);
> + }
> +
> + ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint));
> + if (!ep) {
> + QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n");
> + ret = -ENOMEM;
> + return ERR_PTR(ret);
> + }
> + qedi_ep = ep->dd_data;
> + memset(qedi_ep, 0, sizeof(struct qedi_endpoint));
> + qedi_ep->state = EP_STATE_IDLE;
> + qedi_ep->iscsi_cid = (u32)-1;
> + qedi_ep->qedi = qedi;
> +
> + if (dst_addr->sa_family == AF_INET) {
> + addr = (struct sockaddr_in *)dst_addr;
> + memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr,
> + sizeof(struct in_addr));
> + qedi_ep->dst_port = ntohs(addr->sin_port);
> + qedi_ep->ip_type = TCP_IPV4;
> + QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
> + "dst_addr=%pI4, dst_port=%u\n",
> + qedi_ep->dst_addr, qedi_ep->dst_port);
> + } else if (dst_addr->sa_family == AF_INET6) {
> + addr6 = (struct sockaddr_in6 *)dst_addr;
> + memcpy(qedi_ep->dst_addr, &addr6->sin6_addr,
> + sizeof(struct in6_addr));
> + qedi_ep->dst_port = ntohs(addr6->sin6_port);
> + qedi_ep->ip_type = TCP_IPV6;
> + QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
> + "dst_addr=%pI6, dst_port=%u\n",
> + qedi_ep->dst_addr, qedi_ep->dst_port);
> + } else {
> + QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n");
> + }
> +
> + if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) {
> + QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n");
> + ret = -ENXIO;
> + goto ep_conn_exit;
> + }
> +
> + ret = qedi_alloc_sq(qedi, qedi_ep);
> + if (ret)
> + goto ep_conn_exit;
> +
> + ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle,
> + &qedi_ep->fw_cid, &qedi_ep->p_doorbell);
> +
> + if (ret) {
> + QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n");
> + ret = -ENXIO;
> + goto ep_free_sq;
> + }
> +
> + iscsi_cid = qedi_ep->handle;
> + qedi_ep->iscsi_cid = iscsi_cid;
> +
> + init_waitqueue_head(&qedi_ep->ofld_wait);
> + init_waitqueue_head(&qedi_ep->tcp_ofld_wait);
> + qedi_ep->state = EP_STATE_OFLDCONN_START;
> + qedi->ep_tbl[iscsi_cid] = qedi_ep;
> +
> + buf = (char *)&path_req;
> + len = sizeof(path_req);
> + memset(&path_req, 0, len);
> +
> + msg_type = ISCSI_KEVENT_PATH_REQ;
> + path_req.handle = (u64)qedi_ep->iscsi_cid;
> + path_req.pmtu = qedi->ll2_mtu;
> + qedi_ep->pmtu = qedi->ll2_mtu;
> + if (qedi_ep->ip_type == TCP_IPV4) {
> + memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr,
> + sizeof(struct in_addr));
> + path_req.ip_addr_len = 4;
> + } else {
> + memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr,
> + sizeof(struct in6_addr));
> + path_req.ip_addr_len = 16;
> + }
> +
> + ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf,
> + len);
> + if (ret) {
> + QEDI_ERR(&qedi->dbg_ctx,
> + "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n",
> + iscsi_cid, ret);
> + goto ep_rel_conn;
> + }
> +
> + atomic_inc(&qedi->num_offloads);
> + return ep;
> +
> +ep_rel_conn:
> + qedi->ep_tbl[iscsi_cid] = NULL;
> + ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
> + if (ret)
> + QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n",
> + ret);
> +ep_free_sq:
> + qedi_free_sq(qedi, qedi_ep);
> +ep_conn_exit:
> + iscsi_destroy_endpoint(ep);
> + return ERR_PTR(ret);
> +}
> +
> +static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
> +{
> + struct qedi_endpoint *qedi_ep;
> + int ret = 0;
> +
> + if (do_not_recover)
> + return 1;
> +
> + qedi_ep = ep->dd_data;
> + if (qedi_ep->state == EP_STATE_IDLE ||
> + qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
> + return -1;
> +
> + if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL)
> + ret = 1;
> +
> + ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait,
> + ((qedi_ep->state ==
> + EP_STATE_OFLDCONN_FAILED) ||
> + (qedi_ep->state ==
> + EP_STATE_OFLDCONN_COMPL)),
> + msecs_to_jiffies(timeout_ms));
> +
> + if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
> + ret = -1;
> +
> + if (ret > 0)
> + return 1;
> + else if (!ret)
> + return 0;
> + else
> + return ret;
> +}
> +
> +static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn)
> +{
> + struct qedi_cmd *cmd, *cmd_tmp;
> +
> + list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
> + io_cmd) {
> + list_del_init(&cmd->io_cmd);
> + qedi_conn->active_cmd_count--;
> + }
> +}
> +
> +static void qedi_ep_disconnect(struct iscsi_endpoint *ep)
> +{
> + struct qedi_endpoint *qedi_ep;
> + struct qedi_conn *qedi_conn = NULL;
> + struct iscsi_conn *conn = NULL;
> + struct qedi_ctx *qedi;
> + int ret = 0;
> + int wait_delay = 20 * HZ;
> + int abrt_conn = 0;
> + int count = 10;
> +
> + qedi_ep = ep->dd_data;
> + qedi = qedi_ep->qedi;
> +
> + flush_work(&qedi_ep->offload_work);
> +
> + if (qedi_ep->conn) {
> + qedi_conn = qedi_ep->conn;
> + conn = qedi_conn->cls_conn->dd_data;
> + iscsi_suspend_queue(conn);
> + abrt_conn = qedi_conn->abrt_conn;
> +
> + while (count--) {
> + if (!test_bit(QEDI_CONN_FW_CLEANUP,
> + &qedi_conn->flags)) {
> + break;
> + }
> + msleep(1000);
> + }
> +
> + if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
> + if (do_not_recover) {
> + QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
> + "Do not recover cid=0x%x\n",
> + qedi_ep->iscsi_cid);
> + goto ep_exit_recover;
> + }
> + QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
> + "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n",
> + qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state);
> + qedi_cleanup_active_cmd_list(qedi_conn);
> + goto ep_release_conn;
> + }
> + }
> +
> + if (do_not_recover)
> + goto ep_exit_recover;
> +
> + switch (qedi_ep->state) {
> + case EP_STATE_OFLDCONN_START:
> + goto ep_release_conn;
> + case EP_STATE_OFLDCONN_FAILED:
> + break;
> + case EP_STATE_OFLDCONN_COMPL:
> + if (unlikely(!qedi_conn))
> + break;
> +
> + QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
> + "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n",
> + qedi_conn->active_cmd_count, abrt_conn,
> + qedi_ep->state,
> + qedi_ep->iscsi_cid,
> + qedi_ep->conn
> + );
> +
> + if (!qedi_conn->active_cmd_count)
> + abrt_conn = 0;
> + else
> + abrt_conn = 1;
> +
> + if (abrt_conn)
> + qedi_clearsq(qedi, qedi_conn, NULL);
> + break;
> + default:
> + break;
> + }
> +
> + qedi_ep->state = EP_STATE_DISCONN_START;
> + ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn);
> + if (ret) {
> + QEDI_WARN(&qedi->dbg_ctx,
> + "destroy_conn failed returned %d\n", ret);
> + } else {
> + ret = wait_event_interruptible_timeout(
> + qedi_ep->tcp_ofld_wait,
> + (qedi_ep->state !=
> + EP_STATE_DISCONN_START),
> + wait_delay);
> + if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) {
> + QEDI_WARN(&qedi->dbg_ctx,
> + "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n",
> + ret, wait_delay, qedi_ep->iscsi_cid);
> + }
> + }
> +
> +ep_release_conn:
> + ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
> + if (ret)
> + QEDI_WARN(&qedi->dbg_ctx,
> + "release_conn returned %d, cid=0x%x\n",
> + ret, qedi_ep->iscsi_cid);
> +ep_exit_recover:
> + qedi_ep->state = EP_STATE_IDLE;
> + qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL;
> + qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL;
> + qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port);
> + qedi_free_sq(qedi, qedi_ep);
> +
> + if (qedi_conn)
> + qedi_conn->ep = NULL;
> +
> + qedi_ep->conn = NULL;
> + qedi_ep->qedi = NULL;
> + atomic_dec(&qedi->num_offloads);
> +
> + iscsi_destroy_endpoint(ep);
> +}
> +
> +static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid)
> +{
> + struct qed_dev *cdev = qedi->cdev;
> + struct qedi_uio_dev *udev;
> + struct qedi_uio_ctrl *uctrl;
> + struct sk_buff *skb;
> + u32 len;
> + int rc = 0;
> +
> + udev = qedi->udev;
> + if (!udev) {
> + QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n");
> + return -EINVAL;
> + }
> +
> + uctrl = (struct qedi_uio_ctrl *)udev->uctrl;
> + if (!uctrl) {
> + QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n");
> + return -EINVAL;
> + }
> +
> + len = uctrl->host_tx_pkt_len;
> + if (!len) {
> + QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len);
> + return -EINVAL;
> + }
> +
> + skb = alloc_skb(len, GFP_ATOMIC);
> + if (!skb) {
> + QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n");
> + return -EINVAL;
> + }
> +
> + skb_put(skb, len);
> + memcpy(skb->data, udev->tx_pkt, len);
> + skb->ip_summed = CHECKSUM_NONE;
> +
> + if (vlanid)
> + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid);
> +
> + rc = qedi_ops->ll2->start_xmit(cdev, skb);
> + if (rc) {
> + QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n",
> + rc);
> + kfree_skb(skb);
> + }
> +
> + uctrl->host_tx_pkt_len = 0;
> + uctrl->hw_tx_cons++;
> +
> + return rc;
> +}
> +
> +static void qedi_offload_work(struct work_struct *work)
> +{
> + struct qedi_endpoint *qedi_ep =
> + container_of(work, struct qedi_endpoint, offload_work);
> + struct qedi_ctx *qedi;
> + int wait_delay = 20 * HZ;
> + int ret;
> +
> + qedi = qedi_ep->qedi;
> +
> + ret = qedi_iscsi_offload_conn(qedi_ep);
> + if (ret) {
> + QEDI_ERR(&qedi->dbg_ctx,
> + "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n",
> + qedi_ep->iscsi_cid, qedi_ep, ret);
> + qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
> + return;
> + }
> +
> + ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait,
> + (qedi_ep->state ==
> + EP_STATE_OFLDCONN_COMPL),
> + wait_delay);
> + if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) {
> + qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
> + QEDI_ERR(&qedi->dbg_ctx,
> + "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n",
> + qedi_ep->iscsi_cid, qedi_ep);
> + }
> +}
> +
> +static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data)
> +{
> + struct qedi_ctx *qedi;
> + struct qedi_endpoint *qedi_ep;
> + int ret = 0;
> + u32 iscsi_cid;
> + u16 port_id = 0;
> +
> + if (!shost) {
> + ret = -ENXIO;
> + QEDI_ERR(NULL, "shost is NULL\n");
> + return ret;
> + }
> +
> + if (strcmp(shost->hostt->proc_name, "qedi")) {
> + ret = -ENXIO;
> + QEDI_ERR(NULL, "shost %s is invalid\n",
> + shost->hostt->proc_name);
> + return ret;
> + }
> +
> + qedi = iscsi_host_priv(shost);
> + if (path_data->handle == QEDI_PATH_HANDLE) {
> + ret = qedi_data_avail(qedi, path_data->vlan_id);
> + goto set_path_exit;
> + }
> +
> + iscsi_cid = (u32)path_data->handle;
> + qedi_ep = qedi->ep_tbl[iscsi_cid];
> + QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
> + "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep);
> +
> + if (!is_valid_ether_addr(&path_data->mac_addr[0])) {
> + QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n");
> + ret = -EIO;
> + goto set_path_exit;
> + }
> +
> + ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]);
> + ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]);
> +
> + qedi_ep->vlan_id = path_data->vlan_id;
> + if (path_data->pmtu < DEF_PATH_MTU) {
> + qedi_ep->pmtu = qedi->ll2_mtu;
> + QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
> + "MTU cannot be %u, using default MTU %u\n",
> + path_data->pmtu, qedi_ep->pmtu);
> + }
> +
> + if (path_data->pmtu != qedi->ll2_mtu) {
> + if (path_data->pmtu > JUMBO_MTU) {
> + ret = -EINVAL;
> + QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu);
> + goto set_path_exit;
> + }
> +
> + qedi_reset_host_mtu(qedi, path_data->pmtu);
> + qedi_ep->pmtu = qedi->ll2_mtu;
> + }
> +
> + port_id = qedi_ep->src_port;
> + if (port_id >= QEDI_LOCAL_PORT_MIN &&
> + port_id < QEDI_LOCAL_PORT_MAX) {
> + if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id))
> + port_id = 0;
> + } else {
> + port_id = 0;
> + }
> +
> + if (!port_id) {
> + port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl);
> + if (port_id == QEDI_LOCAL_PORT_INVALID) {
> + QEDI_ERR(&qedi->dbg_ctx,
> + "Failed to allocate port id for iscsi_cid=0x%x\n",
> + iscsi_cid);
> + ret = -ENOMEM;
> + goto set_path_exit;
> + }
> + }
> +
> + qedi_ep->src_port = port_id;
> +
> + if (qedi_ep->ip_type == TCP_IPV4) {
> + memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr,
> + sizeof(struct in_addr));
> + memcpy(&qedi->src_ip[0], &path_data->src.v4_addr,
> + sizeof(struct in_addr));
> + qedi->ip_type = TCP_IPV4;
> +
> + QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
> + "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n",
> + qedi_ep->src_addr, qedi_ep->src_port,
> + qedi_ep->dst_addr, qedi_ep->dst_port);
> + } else {
> + memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr,
> + sizeof(struct in6_addr));
> + memcpy(&qedi->src_ip[0], &path_data->src.v6_addr,
> + sizeof(struct in6_addr));
> + qedi->ip_type = TCP_IPV6;
> +
> + QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
> + "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n",
> + qedi_ep->src_addr, qedi_ep->src_port,
> + qedi_ep->dst_addr, qedi_ep->dst_port);
> + }
> +
> + INIT_WORK(&qedi_ep->offload_work, qedi_offload_work);
> + queue_work(qedi->offload_thread, &qedi_ep->offload_work);
> +
> + ret = 0;
> +
> +set_path_exit:
> + return ret;
> +}
> +
> +static umode_t qedi_attr_is_visible(int param_type, int param)
> +{
> + switch (param_type) {
> + case ISCSI_HOST_PARAM:
> + switch (param) {
> + case ISCSI_HOST_PARAM_NETDEV_NAME:
> + case ISCSI_HOST_PARAM_HWADDRESS:
> + case ISCSI_HOST_PARAM_IPADDRESS:
> + return S_IRUGO;
> + default:
> + return 0;
> + }
> + case ISCSI_PARAM:
> + switch (param) {
> + case ISCSI_PARAM_MAX_RECV_DLENGTH:
> + case ISCSI_PARAM_MAX_XMIT_DLENGTH:
> + case ISCSI_PARAM_HDRDGST_EN:
> + case ISCSI_PARAM_DATADGST_EN:
> + case ISCSI_PARAM_CONN_ADDRESS:
> + case ISCSI_PARAM_CONN_PORT:
> + case ISCSI_PARAM_EXP_STATSN:
> + case ISCSI_PARAM_PERSISTENT_ADDRESS:
> + case ISCSI_PARAM_PERSISTENT_PORT:
> + case ISCSI_PARAM_PING_TMO:
> + case ISCSI_PARAM_RECV_TMO:
> + case ISCSI_PARAM_INITIAL_R2T_EN:
> + case ISCSI_PARAM_MAX_R2T:
> + case ISCSI_PARAM_IMM_DATA_EN:
> + case ISCSI_PARAM_FIRST_BURST:
> + case ISCSI_PARAM_MAX_BURST:
> + case ISCSI_PARAM_PDU_INORDER_EN:
> + case ISCSI_PARAM_DATASEQ_INORDER_EN:
> + case ISCSI_PARAM_ERL:
> + case ISCSI_PARAM_TARGET_NAME:
> + case ISCSI_PARAM_TPGT:
> + case ISCSI_PARAM_USERNAME:
> + case ISCSI_PARAM_PASSWORD:
> + case ISCSI_PARAM_USERNAME_IN:
> + case ISCSI_PARAM_PASSWORD_IN:
> + case ISCSI_PARAM_FAST_ABORT:
> + case ISCSI_PARAM_ABORT_TMO:
> + case ISCSI_PARAM_LU_RESET_TMO:
> + case ISCSI_PARAM_TGT_RESET_TMO:
> + case ISCSI_PARAM_IFACE_NAME:
> + case ISCSI_PARAM_INITIATOR_NAME:
> + case ISCSI_PARAM_BOOT_ROOT:
> + case ISCSI_PARAM_BOOT_NIC:
> + case ISCSI_PARAM_BOOT_TARGET:
> + return S_IRUGO;
> + default:
> + return 0;
> + }
> + }
> +
> + return 0;
> +}
> +
> +static void qedi_cleanup_task(struct iscsi_task *task)
> +{
> + if (!task->sc || task->state == ISCSI_TASK_PENDING) {
> + QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n",
> + atomic_read(&task->refcount));
> + return;
> + }
> +
> + qedi_iscsi_unmap_sg_list(task->dd_data);
> +}
> +
> +struct iscsi_transport qedi_iscsi_transport = {
> + .owner = THIS_MODULE,
> + .name = QEDI_MODULE_NAME,
> + .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST |
> + CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO,
> + .create_session = qedi_session_create,
> + .destroy_session = qedi_session_destroy,
> + .create_conn = qedi_conn_create,
> + .bind_conn = qedi_conn_bind,
> + .start_conn = qedi_conn_start,
> + .stop_conn = iscsi_conn_stop,
> + .destroy_conn = qedi_conn_destroy,
> + .set_param = iscsi_set_param,
> + .get_ep_param = qedi_ep_get_param,
> + .get_conn_param = iscsi_conn_get_param,
> + .get_session_param = iscsi_session_get_param,
> + .get_host_param = qedi_host_get_param,
> + .send_pdu = iscsi_conn_send_pdu,
> + .get_stats = qedi_conn_get_stats,
> + .xmit_task = qedi_task_xmit,
> + .cleanup_task = qedi_cleanup_task,
> + .session_recovery_timedout = iscsi_session_recovery_timedout,
> + .ep_connect = qedi_ep_connect,
> + .ep_poll = qedi_ep_poll,
> + .ep_disconnect = qedi_ep_disconnect,
> + .set_path = qedi_set_path,
> + .attr_is_visible = qedi_attr_is_visible,
> +};
> +
> +void qedi_start_conn_recovery(struct qedi_ctx *qedi,
> + struct qedi_conn *qedi_conn)
> +{
> + struct iscsi_cls_session *cls_sess;
> + struct iscsi_cls_conn *cls_conn;
> + struct iscsi_conn *conn;
> +
> + cls_conn = qedi_conn->cls_conn;
> + conn = cls_conn->dd_data;
> + cls_sess = iscsi_conn_to_session(cls_conn);
> +
> + if (iscsi_is_session_online(cls_sess)) {
> + qedi_conn->abrt_conn = 1;
> + QEDI_ERR(&qedi->dbg_ctx,
> + "Failing connection, state=0x%x, cid=0x%x\n",
> + conn->session->state, qedi_conn->iscsi_conn_id);
> + iscsi_conn_failure(qedi_conn->cls_conn->dd_data,
> + ISCSI_ERR_CONN_FAILED);
> + }
> +}
> +
> +void qedi_process_iscsi_error(struct qedi_endpoint *ep, struct async_data *data)
> +{
> + struct qedi_conn *qedi_conn;
> + struct qedi_ctx *qedi;
> + char warn_notice[] = "iscsi_warning";
> + char error_notice[] = "iscsi_error";
> + char *message;
> + int need_recovery = 0;
> + u32 err_mask = 0;
> + char msg[64];
> +
> + if (!ep)
> + return;
> +
> + qedi_conn = ep->conn;
> + if (!qedi_conn)
> + return;
> +
> + qedi = ep->qedi;
> +
> + QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n",
> + data->error_code);
> +
> + if (err_mask) {
> + need_recovery = 0;
> + message = warn_notice;
> + } else {
> + need_recovery = 1;
> + message = error_notice;
> + }
> +
> + switch (data->error_code) {
> + case ISCSI_STATUS_NONE:
> + strcpy(msg, "tcp_error none");
> + break;
> + case ISCSI_CONN_ERROR_TASK_CID_MISMATCH:
> + strcpy(msg, "task cid mismatch");
> + break;
> + case ISCSI_CONN_ERROR_TASK_NOT_VALID:
> + strcpy(msg, "invalid task");
> + break;
> + case ISCSI_CONN_ERROR_RQ_RING_IS_FULL:
> + strcpy(msg, "rq ring full");
> + break;
> + case ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL:
> + strcpy(msg, "cmdq ring full");
> + break;
> + case ISCSI_CONN_ERROR_HQE_CACHING_FAILED:
> + strcpy(msg, "sge caching failed");
> + break;
> + case ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR:
> + strcpy(msg, "hdr digest error");
> + break;
> + case ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR:
> + strcpy(msg, "local cmpl error");
> + break;
> + case ISCSI_CONN_ERROR_DATA_OVERRUN:
> + strcpy(msg, "invalid task");
> + break;
> + case ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR:
> + strcpy(msg, "out of sge error");
> + break;
> + case ISCSI_CONN_ERROR_TCP_SEG_PROC_IP_OPTIONS_ERROR:
> + strcpy(msg, "tcp seg ip options error");
> + break;
> + case ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR:
> + strcpy(msg, "tcp ip fragment error");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN:
> + strcpy(msg, "AHS len protocol error");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE:
> + strcpy(msg, "itt out of range error");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE:
> + strcpy(msg, "data seg more than pdu size");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE:
> + strcpy(msg, "invalid opcode");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE:
> + strcpy(msg, "invalid opcode before update");
> + break;
> + case ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL:
> + strcpy(msg, "unexpected opcode");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA:
> + strcpy(msg, "r2t carries no data");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN:
> + strcpy(msg, "data sn error");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT:
> + strcpy(msg, "data TTT error");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT:
> + strcpy(msg, "r2t TTT error");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET:
> + strcpy(msg, "buffer offset error");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO:
> + strcpy(msg, "buffer offset ooo");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN:
> + strcpy(msg, "data seg len 0");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0:
> + strcpy(msg, "data xer len error");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1:
> + strcpy(msg, "data xer len1 error");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2:
> + strcpy(msg, "data xer len2 error");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN:
> + strcpy(msg, "protocol lun error");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO:
> + strcpy(msg, "f bit zero error");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO_S_BIT_ONE:
> + strcpy(msg, "f bit zero s bit one error");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN:
> + strcpy(msg, "exp stat sn error");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO:
> + strcpy(msg, "dsl not zero error");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL:
> + strcpy(msg, "invalid dsl");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG:
> + strcpy(msg, "data seg len too big");
> + break;
> + case ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT:
> + strcpy(msg, "outstanding r2t count error");
> + break;
> + case ISCSI_CONN_ERROR_SENSE_DATA_LENGTH:
> + strcpy(msg, "sense datalen error");
> + break;
Please use an array for mapping values onto strings.
> + case ISCSI_ERROR_UNKNOWN:
> + default:
> + need_recovery = 0;
> + strcpy(msg, "unknown error");
> + break;
> + }
> + iscsi_conn_printk(KERN_ALERT,
> + qedi_conn->cls_conn->dd_data,
> + "qedi: %s - %s\n", message, msg);
> +
> + if (need_recovery)
> + qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
> +}
> +
> +void qedi_process_tcp_error(struct qedi_endpoint *ep, struct async_data *data)
> +{
> + struct qedi_conn *qedi_conn;
> +
> + if (!ep)
> + return;
> +
> + qedi_conn = ep->conn;
> + if (!qedi_conn)
> + return;
> +
> + QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n",
> + data->error_code);
> +
> + qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
> +}
> diff --git a/drivers/scsi/qedi/qedi_iscsi.h b/drivers/scsi/qedi/qedi_iscsi.h
> new file mode 100644
> index 0000000..6da1c90
> --- /dev/null
> +++ b/drivers/scsi/qedi/qedi_iscsi.h
> @@ -0,0 +1,228 @@
> +/*
> + * QLogic iSCSI Offload Driver
> + * Copyright (c) 2016 Cavium Inc.
> + *
> + * This software is available under the terms of the GNU General Public License
> + * (GPL) Version 2, available from the file COPYING in the main directory of
> + * this source tree.
> + */
> +
> +#ifndef _QEDI_ISCSI_H_
> +#define _QEDI_ISCSI_H_
> +
> +#include <linux/socket.h>
> +#include <linux/completion.h>
> +#include "qedi.h"
> +
> +#define ISCSI_MAX_SESS_PER_HBA 4096
> +
> +#define DEF_KA_TIMEOUT 7200000
> +#define DEF_KA_INTERVAL 10000
> +#define DEF_KA_MAX_PROBE_COUNT 10
> +#define DEF_TOS 0
> +#define DEF_TTL 0xfe
> +#define DEF_SND_SEQ_SCALE 0
> +#define DEF_RCV_BUF 0xffff
> +#define DEF_SND_BUF 0xffff
> +#define DEF_SEED 0
> +#define DEF_MAX_RT_TIME 8000
> +#define DEF_MAX_DA_COUNT 2
> +#define DEF_SWS_TIMER 1000
> +#define DEF_MAX_CWND 2
> +#define DEF_PATH_MTU 1500
> +#define DEF_MSS 1460
> +#define DEF_LL2_MTU 1560
> +#define JUMBO_MTU 9000
> +
> +#define MIN_MTU 576 /* rfc 793 */
> +#define IPV4_HDR_LEN 20
> +#define IPV6_HDR_LEN 40
> +#define TCP_HDR_LEN 20
> +#define TCP_OPTION_LEN 12
> +#define VLAN_LEN 4
> +
> +enum {
> + EP_STATE_IDLE = 0x0,
> + EP_STATE_ACQRCONN_START = 0x1,
> + EP_STATE_ACQRCONN_COMPL = 0x2,
> + EP_STATE_OFLDCONN_START = 0x4,
> + EP_STATE_OFLDCONN_COMPL = 0x8,
> + EP_STATE_DISCONN_START = 0x10,
> + EP_STATE_DISCONN_COMPL = 0x20,
> + EP_STATE_CLEANUP_START = 0x40,
> + EP_STATE_CLEANUP_CMPL = 0x80,
> + EP_STATE_TCP_FIN_RCVD = 0x100,
> + EP_STATE_TCP_RST_RCVD = 0x200,
> + EP_STATE_LOGOUT_SENT = 0x400,
> + EP_STATE_LOGOUT_RESP_RCVD = 0x800,
> + EP_STATE_CLEANUP_FAILED = 0x1000,
> + EP_STATE_OFLDCONN_FAILED = 0x2000,
> + EP_STATE_CONNECT_FAILED = 0x4000,
> + EP_STATE_DISCONN_TIMEDOUT = 0x8000,
> +};
> +
> +struct qedi_conn;
> +
> +struct qedi_endpoint {
> + struct qedi_ctx *qedi;
> + u32 dst_addr[4];
> + u32 src_addr[4];
> + u16 src_port;
> + u16 dst_port;
> + u16 vlan_id;
> + u16 pmtu;
> + u8 src_mac[ETH_ALEN];
> + u8 dst_mac[ETH_ALEN];
> + u8 ip_type;
> + int state;
> + wait_queue_head_t ofld_wait;
> + wait_queue_head_t tcp_ofld_wait;
> + u32 iscsi_cid;
> + /* identifier of the connection from qed */
> + u32 handle;
> + u32 fw_cid;
> + void __iomem *p_doorbell;
> +
> + /* Send queue management */
> + struct iscsi_wqe *sq;
> + dma_addr_t sq_dma;
> +
> + u16 sq_prod_idx;
> + u16 fw_sq_prod_idx;
> + u16 sq_con_idx;
> + u32 sq_mem_size;
> +
> + void *sq_pbl;
> + dma_addr_t sq_pbl_dma;
> + u32 sq_pbl_size;
> + struct qedi_conn *conn;
> + struct work_struct offload_work;
> +};
> +
> +#define QEDI_SQ_WQES_MIN 16
> +
> +struct qedi_io_bdt {
> + struct iscsi_sge *sge_tbl;
> + dma_addr_t sge_tbl_dma;
> + u16 sge_valid;
> +};
> +
> +/**
> + * struct generic_pdu_resc - login pdu resource structure
> + *
> + * @req_buf: driver buffer used to stage payload associated with
> + * the login request
> + * @req_dma_addr: dma address for iscsi login request payload buffer
> + * @req_buf_size: actual login request payload length
> + * @req_wr_ptr: pointer into login request buffer when next data is
> + * to be written
> + * @resp_hdr: iscsi header where iscsi login response header is to
> + * be recreated
> + * @resp_buf: buffer to stage login response payload
> + * @resp_dma_addr: login response payload buffer dma address
> + * @resp_buf_size: login response paylod length
> + * @resp_wr_ptr: pointer into login response buffer when next data is
> + * to be written
> + * @req_bd_tbl: iscsi login request payload BD table
> + * @req_bd_dma: login request BD table dma address
> + * @resp_bd_tbl: iscsi login response payload BD table
> + * @resp_bd_dma: login request BD table dma address
> + *
> + * following structure defines buffer info for generic pdus such as iSCSI Login,
> + * Logout and NOP
> + */
> +struct generic_pdu_resc {
> + char *req_buf;
> + dma_addr_t req_dma_addr;
> + u32 req_buf_size;
> + char *req_wr_ptr;
> + struct iscsi_hdr resp_hdr;
> + char *resp_buf;
> + dma_addr_t resp_dma_addr;
> + u32 resp_buf_size;
> + char *resp_wr_ptr;
> + char *req_bd_tbl;
> + dma_addr_t req_bd_dma;
> + char *resp_bd_tbl;
> + dma_addr_t resp_bd_dma;
> +};
> +
> +struct qedi_conn {
> + struct iscsi_cls_conn *cls_conn;
> + struct qedi_ctx *qedi;
> + struct qedi_endpoint *ep;
> + struct list_head active_cmd_list;
> + spinlock_t list_lock; /* internal conn lock */
> + u32 active_cmd_count;
> + u32 cmd_cleanup_req;
> + u32 cmd_cleanup_cmpl;
> +
> + u32 iscsi_conn_id;
> + int itt;
> + int abrt_conn;
> +#define QEDI_CID_RESERVED 0x5AFF
> + u32 fw_cid;
> + /*
> + * Buffer for login negotiation process
> + */
> + struct generic_pdu_resc gen_pdu;
> +
> + struct list_head tmf_work_list;
> + wait_queue_head_t wait_queue;
> + spinlock_t tmf_work_lock; /* tmf work lock */
> + unsigned long flags;
> +#define QEDI_CONN_FW_CLEANUP 1
> +};
> +
> +struct qedi_cmd {
> + struct list_head io_cmd;
> + bool io_cmd_in_list;
> + struct iscsi_hdr hdr;
> + struct qedi_conn *conn;
> + struct scsi_cmnd *scsi_cmd;
> + struct scatterlist *sg;
> + struct qedi_io_bdt io_tbl;
> + struct iscsi_task_context request;
> + unsigned char *sense_buffer;
> + dma_addr_t sense_buffer_dma;
> + u16 task_id;
> +
> + /* field populated for tmf work queue */
> + struct iscsi_task *task;
> + struct work_struct tmf_work;
> + int state;
> +#define CLEANUP_WAIT 1
> +#define CLEANUP_RECV 2
> +#define CLEANUP_WAIT_FAILED 3
> +#define CLEANUP_NOT_REQUIRED 4
> +#define LUN_RESET_RESPONSE_RECEIVED 5
> +#define RESPONSE_RECEIVED 6
> +
> + int type;
> +#define TYPEIO 1
> +#define TYPERESET 2
> +
> + struct qedi_work_map *list_tmf_work;
> + /* slowpath management */
> + bool use_slowpath;
> +
> + struct iscsi_tm_rsp *tmf_resp_buf;
> +};
> +
> +struct qedi_work_map {
> + struct list_head list;
> + struct qedi_cmd *qedi_cmd;
> + int rtid;
> +
> + int state;
> +#define QEDI_WORK_QUEUED 1
> +#define QEDI_WORK_SCHEDULED 2
> +#define QEDI_WORK_EXIT 3
> +
> + struct work_struct *ptr_tmf_work;
> +};
> +
> +#define qedi_set_itt(task_id, itt) ((u32)((task_id & 0xffff) | (itt << 16)))
> +#define qedi_get_itt(cqe) (cqe.iscsi_hdr.cmd.itt >> 16)
> +
> +#endif /* _QEDI_ISCSI_H_ */
> diff --git a/drivers/scsi/qedi/qedi_main.c b/drivers/scsi/qedi/qedi_main.c
> index 58ac9a2..22d19a3 100644
> --- a/drivers/scsi/qedi/qedi_main.c
> +++ b/drivers/scsi/qedi/qedi_main.c
> @@ -27,6 +27,8 @@
> #include <scsi/scsi.h>
>
> #include "qedi.h"
> +#include "qedi_gbl.h"
> +#include "qedi_iscsi.h"
>
> static uint fw_debug;
> module_param(fw_debug, uint, S_IRUGO | S_IWUSR);
> @@ -1368,6 +1370,139 @@ static int qedi_alloc_global_queues(struct qedi_ctx *qedi)
> return status;
> }
>
> +int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
> +{
> + int rval = 0;
> + u32 *pbl;
> + dma_addr_t page;
> + int num_pages;
> +
> + if (!ep)
> + return -EIO;
> +
> + /* Calculate appropriate queue and PBL sizes */
> + ep->sq_mem_size = QEDI_SQ_SIZE * sizeof(struct iscsi_wqe);
> + ep->sq_mem_size += QEDI_PAGE_SIZE - 1;
> +
> + ep->sq_pbl_size = (ep->sq_mem_size / QEDI_PAGE_SIZE) * sizeof(void *);
> + ep->sq_pbl_size = ep->sq_pbl_size + QEDI_PAGE_SIZE;
> +
> + ep->sq = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_mem_size,
> + &ep->sq_dma, GFP_KERNEL);
> + if (!ep->sq) {
> + QEDI_WARN(&qedi->dbg_ctx,
> + "Could not allocate send queue.\n");
> + rval = -ENOMEM;
> + goto out;
> + }
> + memset(ep->sq, 0, ep->sq_mem_size);
> +
> + ep->sq_pbl = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_pbl_size,
> + &ep->sq_pbl_dma, GFP_KERNEL);
> + if (!ep->sq_pbl) {
> + QEDI_WARN(&qedi->dbg_ctx,
> + "Could not allocate send queue PBL.\n");
> + rval = -ENOMEM;
> + goto out_free_sq;
> + }
> + memset(ep->sq_pbl, 0, ep->sq_pbl_size);
> +
> + /* Create PBL */
> + num_pages = ep->sq_mem_size / QEDI_PAGE_SIZE;
> + page = ep->sq_dma;
> + pbl = (u32 *)ep->sq_pbl;
> +
> + while (num_pages--) {
> + *pbl = (u32)page;
> + pbl++;
> + *pbl = (u32)((u64)page >> 32);
> + pbl++;
> + page += QEDI_PAGE_SIZE;
> + }
> +
> + return rval;
> +
> +out_free_sq:
> + dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
> + ep->sq_dma);
> +out:
> + return rval;
> +}
> +
> +void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
> +{
> + if (ep->sq_pbl)
> + dma_free_coherent(&qedi->pdev->dev, ep->sq_pbl_size, ep->sq_pbl,
> + ep->sq_pbl_dma);
> + if (ep->sq)
> + dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
> + ep->sq_dma);
> +}
> +
> +int qedi_get_task_idx(struct qedi_ctx *qedi)
> +{
> + s16 tmp_idx;
> +
> +again:
> + tmp_idx = find_first_zero_bit(qedi->task_idx_map,
> + MAX_ISCSI_TASK_ENTRIES);
> +
> + if (tmp_idx >= MAX_ISCSI_TASK_ENTRIES) {
> + QEDI_ERR(&qedi->dbg_ctx, "FW task context pool is full.\n");
> + tmp_idx = -1;
> + goto err_idx;
> + }
> +
> + if (test_and_set_bit(tmp_idx, qedi->task_idx_map))
> + goto again;
> +
> +err_idx:
> + return tmp_idx;
> +}
> +
> +void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx)
> +{
> + if (!test_and_clear_bit(idx, qedi->task_idx_map)) {
> + QEDI_ERR(&qedi->dbg_ctx,
> + "FW task context, already cleared, tid=0x%x\n", idx);
> + WARN_ON(1);
> + }
> +}
> +
> +void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt)
> +{
> + qedi->itt_map[tid].itt = proto_itt;
> +
> + QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
> + "update itt map tid=0x%x, with proto itt=0x%x\n", tid,
> + qedi->itt_map[tid].itt);
> +}
> +
> +void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, s16 *tid)
> +{
> + u16 i;
> +
> + for (i = 0; i < MAX_ISCSI_TASK_ENTRIES; i++) {
> + if (qedi->itt_map[i].itt == itt) {
> + *tid = i;
> + QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
> + "Ref itt=0x%x, found at tid=0x%x\n",
> + itt, *tid);
> + return;
> + }
> + }
> +
> + WARN_ON(1);
> +}
> +
> +void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt)
> +{
> + *proto_itt = qedi->itt_map[tid].itt;
> + QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
> + "Get itt map tid [0x%x with proto itt[0x%x]",
> + tid, *proto_itt);
> +}
> +
> static int qedi_alloc_itt(struct qedi_ctx *qedi)
> {
> qedi->itt_map = kzalloc((sizeof(struct qedi_itt_map) *
> @@ -1488,6 +1623,26 @@ static int qedi_cpu_callback(struct notifier_block *nfb,
> .notifier_call = qedi_cpu_callback,
> };
>
> +void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu)
> +{
> + struct qed_ll2_params params;
> +
> + qedi_recover_all_conns(qedi);
> +
> + qedi_ops->ll2->stop(qedi->cdev);
> + qedi_ll2_free_skbs(qedi);
> +
> + QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "old MTU %u, new MTU %u\n",
> + qedi->ll2_mtu, mtu);
> + memset(¶ms, 0, sizeof(params));
> + qedi->ll2_mtu = mtu;
> + params.mtu = qedi->ll2_mtu + IPV6_HDR_LEN + TCP_HDR_LEN;
> + params.drop_ttl0_packets = 0;
> + params.rx_vlan_stripping = 1;
> + ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
> + qedi_ops->ll2->start(qedi->cdev, ¶ms);
> +}
> +
> static void __qedi_remove(struct pci_dev *pdev, int mode)
> {
> struct qedi_ctx *qedi = pci_get_drvdata(pdev);
> @@ -1852,6 +2007,13 @@ static int __init qedi_init(void)
> qedi_dbg_init("qedi");
> #endif
>
> + qedi_scsi_transport = iscsi_register_transport(&qedi_iscsi_transport);
> + if (!qedi_scsi_transport) {
> + QEDI_ERR(NULL, "Could not register qedi transport");
> + rc = -ENOMEM;
> + goto exit_qedi_init_1;
> + }
> +
> register_hotcpu_notifier(&qedi_cpu_notifier);
>
> ret = pci_register_driver(&qedi_pci_driver);
> @@ -1874,6 +2036,7 @@ static int __init qedi_init(void)
> return rc;
>
> exit_qedi_init_2:
> + iscsi_unregister_transport(&qedi_iscsi_transport);
> exit_qedi_init_1:
> #ifdef CONFIG_DEBUG_FS
> qedi_dbg_exit();
> @@ -1892,6 +2055,7 @@ static void __exit qedi_cleanup(void)
>
> pci_unregister_driver(&qedi_pci_driver);
> unregister_hotcpu_notifier(&qedi_cpu_notifier);
> + iscsi_unregister_transport(&qedi_iscsi_transport);
>
> #ifdef CONFIG_DEBUG_FS
> qedi_dbg_exit();
>
Cheers,
Hannes
--
Dr. Hannes Reinecke Teamlead Storage & Networking
hare@...e.de +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton
HRB 21284 (AG Nürnberg)
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