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linux-zen-server/drivers/scsi/qedi/qedi_iscsi.c

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Initial commit
2023-08-30 17:53:23 +02:00
// SPDX-License-Identifier: GPL-2.0-only
/*
* QLogic iSCSI Offload Driver
* Copyright (c) 2016 Cavium Inc.
*/
#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 = 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_timed_out = iscsi_eh_cmd_timed_out,
.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,
.dma_boundary = QEDI_HW_DMA_BOUNDARY,
.cmd_per_lun = 128,
.shost_groups = qedi_shost_groups,
.cmd_size = sizeof(struct iscsi_cmd),
};
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 scsi_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 scsi_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)
{
struct iscsi_session *session = cls_session->dd_data;
struct qedi_conn *qedi_conn = session->leadconn->dd_data;
spin_lock_bh(&session->frwd_lock);
set_bit(QEDI_BLOCK_IO, &qedi_conn->qedi->flags);
spin_unlock_bh(&session->frwd_lock);
}
void qedi_mark_device_available(struct iscsi_cls_session *cls_session)
{
struct iscsi_session *session = cls_session->dd_data;
struct qedi_conn *qedi_conn = session->leadconn->dd_data;
spin_lock_bh(&session->frwd_lock);
clear_bit(QEDI_BLOCK_IO, &qedi_conn->qedi->flags);
spin_unlock_bh(&session->frwd_lock);
}
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;
int rc = 0;
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)) {
rc = -EINVAL;
goto put_ep;
}
if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) {
rc = -EINVAL;
goto put_ep;
}
qedi_ep->conn = qedi_conn;
qedi_conn->ep = qedi_ep;
qedi_conn->iscsi_ep = ep;
qedi_conn->iscsi_conn_id = qedi_ep->iscsi_cid;
qedi_conn->fw_cid = qedi_ep->fw_cid;
qedi_conn->cmd_cleanup_req = 0;
atomic_set(&qedi_conn->cmd_cleanup_cmpl, 0);
if (qedi_bind_conn_to_iscsi_cid(qedi, qedi_conn)) {
rc = -EINVAL;
goto put_ep;
}
spin_lock_init(&qedi_conn->tmf_work_lock);
INIT_LIST_HEAD(&qedi_conn->tmf_work_list);
init_waitqueue_head(&qedi_conn->wait_queue);
put_ep:
iscsi_put_endpoint(ep);
return rc;
}
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");
}
kfree(conn_info);
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;
mss = pmtu - hdrs;
if (!mss)
mss = DEF_MSS;
return mss;
}
static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep)
{
struct qed_iscsi_params_offload *conn_info;
struct qedi_ctx *qedi = qedi_ep->qedi;
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 % qedi->num_queues);
conn_info->ka_max_probe_cnt = DEF_KA_MAX_PROBE_COUNT;
conn_info->dup_ack_theshold = 3;
conn_info->rcv_wnd = 65535;
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->cwnd = DEF_MAX_CWND * conn_info->mss;
conn_info->rcv_wnd_scale = 4;
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);
/* Prepare the doorbell parameters */
qedi_ep->db_data.agg_flags = 0;
qedi_ep->db_data.params = 0;
SET_FIELD(qedi_ep->db_data.params, ISCSI_DB_DATA_DEST, DB_DEST_XCM);
SET_FIELD(qedi_ep->db_data.params, ISCSI_DB_DATA_AGG_CMD,
DB_AGG_CMD_MAX);
SET_FIELD(qedi_ep->db_data.params, ISCSI_DB_DATA_AGG_VAL_SEL,
DQ_XCM_ISCSI_SQ_PROD_CMD);
SET_FIELD(qedi_ep->db_data.params, ISCSI_DB_DATA_BYPASS_EN, 1);
/* Register doorbell with doorbell recovery mechanism */
rval = qedi_ops->common->db_recovery_add(qedi->cdev,
qedi_ep->p_doorbell,
&qedi_ep->db_data,
DB_REC_WIDTH_32B,
DB_REC_KERNEL);
if (rval) {
kfree(conn_info);
return rval;
}
rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info);
if (rval) {
/* delete doorbell from doorbell recovery mechanism */
rval = qedi_ops->common->db_recovery_del(qedi->cdev,
qedi_ep->p_doorbell,
&qedi_ep->db_data);
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 offload conn failed.\n");
rval = -EINVAL;
goto start_err;
}
spin_lock(&qedi_conn->tmf_work_lock);
qedi_conn->fw_cleanup_works = 0;
qedi_conn->ep_disconnect_starting = false;
spin_unlock(&qedi_conn->tmf_work_lock);
qedi_conn->abrt_conn = 0;
rval = iscsi_conn_start(cls_conn);
if (rval) {
iscsi_conn_printk(KERN_ALERT, conn,
"iscsi_conn_start: FW offload 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 scsi_sge *bd_tbl;
bd_tbl = (struct scsi_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 = (struct scsi_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;
}
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_SCSI_TMFUNC:
rc = qedi_send_iscsi_tmf(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;
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;
/* Clear now so in cleanup_task we know it didn't make it */
cmd->scsi_cmd = NULL;
cmd->task_id = U16_MAX;
if (test_bit(QEDI_IN_SHUTDOWN, &qedi_conn->qedi->flags))
return -ENODEV;
if (test_bit(QEDI_BLOCK_IO, &qedi_conn->qedi->flags))
return -EACCES;
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);
cmd->scsi_cmd = sc;
return qedi_iscsi_send_ioreq(task);
}
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 = 5 * 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 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 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, tmp;
if (!shost) {
ret = -ENXIO;
QEDI_ERR(NULL, "shost is NULL\n");
return ERR_PTR(ret);
}
if (qedi_do_not_recover) {
ret = -ENOMEM;
return ERR_PTR(ret);
}
qedi = iscsi_host_priv(shost);
if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) ||
test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
ret = -ENOMEM;
return ERR_PTR(ret);
}
if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) {
QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n");
return ERR_PTR(-ENXIO);
}
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));
INIT_WORK(&qedi_ep->offload_work, qedi_offload_work);
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");
}
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;
tmp = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
if (tmp)
QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n",
tmp);
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 (qedi_do_not_recover)
return 1;
qedi_ep = ep->dd_data;
if (qedi_ep->state == EP_STATE_IDLE ||
qedi_ep->state == EP_STATE_OFLDCONN_NONE ||
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_OFLD_WAIT_STATE(qedi_ep),
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;
spin_lock(&qedi_conn->list_lock);
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--;
}
spin_unlock(&qedi_conn->list_lock);
}
static void qedi_ep_disconnect(struct iscsi_endpoint *ep)
{
struct qedi_endpoint *qedi_ep;
struct qedi_conn *qedi_conn = NULL;
struct qedi_ctx *qedi;
int ret = 0;
int wait_delay;
int abrt_conn = 0;
wait_delay = 60 * HZ + DEF_MAX_RT_TIME;
qedi_ep = ep->dd_data;
qedi = qedi_ep->qedi;
flush_work(&qedi_ep->offload_work);
if (qedi_ep->state == EP_STATE_OFLDCONN_START)
goto ep_exit_recover;
if (qedi_ep->conn) {
qedi_conn = qedi_ep->conn;
abrt_conn = qedi_conn->abrt_conn;
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
"cid=0x%x qedi_ep=%p waiting for %d tmfs\n",
qedi_ep->iscsi_cid, qedi_ep,
qedi_conn->fw_cleanup_works);
spin_lock(&qedi_conn->tmf_work_lock);
qedi_conn->ep_disconnect_starting = true;
while (qedi_conn->fw_cleanup_works > 0) {
spin_unlock(&qedi_conn->tmf_work_lock);
msleep(1000);
spin_lock(&qedi_conn->tmf_work_lock);
}
spin_unlock(&qedi_conn->tmf_work_lock);
if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
if (qedi_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 (qedi_do_not_recover)
goto ep_exit_recover;
switch (qedi_ep->state) {
case EP_STATE_OFLDCONN_START:
case EP_STATE_OFLDCONN_NONE:
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;
}
if (!abrt_conn)
wait_delay += qedi->pf_params.iscsi_pf_params.two_msl_timer;
qedi_ep->state = EP_STATE_DISCONN_START;
if (test_bit(QEDI_IN_SHUTDOWN, &qedi->flags) ||
test_bit(QEDI_IN_RECOVERY, &qedi->flags))
goto ep_release_conn;
/* Delete doorbell from doorbell recovery mechanism */
ret = qedi_ops->common->db_recovery_del(qedi->cdev,
qedi_ep->p_doorbell,
&qedi_ep->db_data);
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, 0);
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 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;
if (iscsi_cid >= qedi->max_active_conns) {
ret = -EINVAL;
goto set_path_exit;
}
qedi_ep = qedi->ep_tbl[iscsi_cid];
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
"iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep);
if (!qedi_ep) {
ret = -EINVAL;
goto set_path_exit;
}
if (!is_valid_ether_addr(&path_data->mac_addr[0])) {
QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n");
qedi_ep->state = EP_STATE_OFLDCONN_NONE;
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);
}
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 0444;
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 0444;
default:
return 0;
}
}
return 0;
}
static void qedi_cleanup_task(struct iscsi_task *task)
{
struct qedi_cmd *cmd;
if (task->state == ISCSI_TASK_PENDING) {
QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n",
refcount_read(&task->refcount));
return;
}
if (task->sc)
qedi_iscsi_unmap_sg_list(task->dd_data);
cmd = task->dd_data;
if (cmd->task_id != U16_MAX)
qedi_clear_task_idx(iscsi_host_priv(task->conn->session->host),
cmd->task_id);
cmd->task_id = U16_MAX;
cmd->scsi_cmd = NULL;
}
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,
.unbind_conn = iscsi_conn_unbind,
.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);
}
}
static const struct {
enum iscsi_error_types error_code;
char *err_string;
} qedi_iscsi_error[] = {
{ ISCSI_STATUS_NONE,
"tcp_error none"
},
{ ISCSI_CONN_ERROR_TASK_CID_MISMATCH,
"task cid mismatch"
},
{ ISCSI_CONN_ERROR_TASK_NOT_VALID,
"invalid task"
},
{ ISCSI_CONN_ERROR_RQ_RING_IS_FULL,
"rq ring full"
},
{ ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL,
"cmdq ring full"
},
{ ISCSI_CONN_ERROR_HQE_CACHING_FAILED,
"sge caching failed"
},
{ ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR,
"hdr digest error"
},
{ ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR,
"local cmpl error"
},
{ ISCSI_CONN_ERROR_DATA_OVERRUN,
"invalid task"
},
{ ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR,
"out of sge error"
},
{ ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR,
"tcp ip fragment error"
},
{ ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN,
"AHS len protocol error"
},
{ ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE,
"itt out of range error"
},
{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE,
"data seg more than pdu size"
},
{ ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE,
"invalid opcode"
},
{ ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE,
"invalid opcode before update"
},
{ ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL,
"unexpected opcode"
},
{ ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA,
"r2t carries no data"
},
{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN,
"data sn error"
},
{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT,
"data TTT error"
},
{ ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT,
"r2t TTT error"
},
{ ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET,
"buffer offset error"
},
{ ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO,
"buffer offset ooo"
},
{ ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN,
"data seg len 0"
},
{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0,
"data xer len error"
},
{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1,
"data xer len1 error"
},
{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2,
"data xer len2 error"
},
{ ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN,
"protocol lun error"
},
{ ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO,
"f bit zero error"
},
{ ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN,
"exp stat sn error"
},
{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO,
"dsl not zero error"
},
{ ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL,
"invalid dsl"
},
{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG,
"data seg len too big"
},
{ ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT,
"outstanding r2t count error"
},
{ ISCSI_CONN_ERROR_SENSE_DATA_LENGTH,
"sense datalen error"
},
};
static char *qedi_get_iscsi_error(enum iscsi_error_types err_code)
{
int i;
char *msg = NULL;
for (i = 0; i < ARRAY_SIZE(qedi_iscsi_error); i++) {
if (qedi_iscsi_error[i].error_code == err_code) {
msg = qedi_iscsi_error[i].err_string;
break;
}
}
return msg;
}
void qedi_process_iscsi_error(struct qedi_endpoint *ep,
struct iscsi_eqe_data *data)
{
struct qedi_conn *qedi_conn;
struct qedi_ctx *qedi;
char warn_notice[] = "iscsi_warning";
char error_notice[] = "iscsi_error";
char unknown_msg[] = "Unknown error";
char *message;
int need_recovery = 0;
u32 err_mask = 0;
char *msg;
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;
}
msg = qedi_get_iscsi_error(data->error_code);
if (!msg) {
need_recovery = 0;
msg = unknown_msg;
}
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 iscsi_eqe_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);
}