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scsi: qla2xxx: Fix N2N link reset 

Fix stalled link recovery for N2N with FC-NVMe connection.

Link: https://lore.kernel.org/r/20190912180918.6436-6-hmadhani@marvell.com
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Quinn Tran 2019-09-12 11:09:09 -07:00 committed by Martin K. Petersen
parent f5187b7d1a
commit 7f2a398d59
4 changed files with 102 additions and 33 deletions
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3
drivers/scsi/qla2xxx/qla_def.h
View File

@ -2396,6 +2396,7 @@ typedef struct fc_port {
unsigned int query:1;
unsigned int id_changed:1;
unsigned int scan_needed:1;
unsigned int n2n_flag:1;
struct completion nvme_del_done;
uint32_t nvme_prli_service_param;
@ -2446,7 +2447,6 @@ typedef struct fc_port {
uint8_t fc4_type;
uint8_t fc4f_nvme;
uint8_t scan_state;
uint8_t n2n_flag;
unsigned long last_queue_full;
unsigned long last_ramp_up;
@ -3036,6 +3036,7 @@ enum scan_flags_t {
enum fc4type_t {
FS_FC4TYPE_FCP = BIT_0,
FS_FC4TYPE_NVME = BIT_1,
FS_FCP_IS_N2N = BIT_7,
};
struct fab_scan_rp {

105
drivers/scsi/qla2xxx/qla_init.c
View File

@ -746,12 +746,15 @@ static void qla24xx_handle_gnl_done_event(scsi_qla_host_t *vha,
break;
default:
if ((id.b24 != fcport->d_id.b24 &&
fcport->d_id.b24) ||
fcport->d_id.b24 &&
fcport->loop_id != FC_NO_LOOP_ID) ||
(fcport->loop_id != FC_NO_LOOP_ID &&
fcport->loop_id != loop_id)) {
ql_dbg(ql_dbg_disc, vha, 0x20e3,
"%s %d %8phC post del sess\n",
__func__, __LINE__, fcport->port_name);
if (fcport->n2n_flag)
fcport->d_id.b24 = 0;
qlt_schedule_sess_for_deletion(fcport);
return;
}
@ -759,6 +762,8 @@ static void qla24xx_handle_gnl_done_event(scsi_qla_host_t *vha,
}
fcport->loop_id = loop_id;
if (fcport->n2n_flag)
fcport->d_id.b24 = id.b24;
wwn = wwn_to_u64(fcport->port_name);
qlt_find_sess_invalidate_other(vha, wwn,
@ -972,7 +977,7 @@ static void qla24xx_async_gnl_sp_done(srb_t *sp, int res)
wwn = wwn_to_u64(e->port_name);
ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0x20e8,
"%s %8phC %02x:%02x:%02x state %d/%d lid %x \n",
"%s %8phC %02x:%02x:%02x CLS %x/%x lid %x \n",
__func__, (void *)&wwn, e->port_id[2], e->port_id[1],
e->port_id[0], e->current_login_state, e->last_login_state,
(loop_id & 0x7fff));
@ -1499,7 +1504,8 @@ int qla24xx_fcport_handle_login(struct scsi_qla_host *vha, fc_port_t *fcport)
(fcport->fw_login_state == DSC_LS_PRLI_PEND)))
return 0;
if (fcport->fw_login_state == DSC_LS_PLOGI_COMP) {
if (fcport->fw_login_state == DSC_LS_PLOGI_COMP &&
!N2N_TOPO(vha->hw)) {
if (time_before_eq(jiffies, fcport->plogi_nack_done_deadline)) {
set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
return 0;
@ -1570,8 +1576,9 @@ int qla24xx_fcport_handle_login(struct scsi_qla_host *vha, fc_port_t *fcport)
qla24xx_post_gpdb_work(vha, fcport, 0);
} else {
ql_dbg(ql_dbg_disc, vha, 0x2118,
"%s %d %8phC post NVMe PRLI\n",
__func__, __LINE__, fcport->port_name);
"%s %d %8phC post %s PRLI\n",
__func__, __LINE__, fcport->port_name,
fcport->fc4f_nvme ? "NVME" : "FC");
qla24xx_post_prli_work(vha, fcport);
}
break;
@ -1853,17 +1860,38 @@ qla24xx_handle_prli_done_event(struct scsi_qla_host *vha, struct event_arg *ea)
break;
}
if (ea->fcport->n2n_flag) {
if (ea->fcport->fc4f_nvme) {
ql_dbg(ql_dbg_disc, vha, 0x2118,
"%s %d %8phC post fc4 prli\n",
__func__, __LINE__, ea->fcport->port_name);
ea->fcport->fc4f_nvme = 0;
ea->fcport->n2n_flag = 0;
qla24xx_post_prli_work(vha, ea->fcport);
return;
}
/* at this point both PRLI NVME & PRLI FCP failed */
if (N2N_TOPO(vha->hw)) {
if (ea->fcport->n2n_link_reset_cnt < 3) {
ea->fcport->n2n_link_reset_cnt++;
/*
* remote port is not sending Plogi. Reset
* link to kick start his state machine
*/
set_bit(N2N_LINK_RESET, &vha->dpc_flags);
} else {
ql_log(ql_log_warn, vha, 0x2119,
"%s %d %8phC Unable to reconnect\n",
__func__, __LINE__, ea->fcport->port_name);
}
} else {
/*
* switch connect. login failed. Take connection
* down and allow relogin to retrigger
*/
ea->fcport->flags &= ~FCF_ASYNC_SENT;
ea->fcport->keep_nport_handle = 0;
qlt_schedule_sess_for_deletion(ea->fcport);
}
ql_dbg(ql_dbg_disc, vha, 0x2119,
"%s %d %8phC unhandle event of %x\n",
__func__, __LINE__, ea->fcport->port_name, ea->data[0]);
break;
}
}
@ -5000,28 +5028,47 @@ qla2x00_configure_local_loop(scsi_qla_host_t *vha)
unsigned long flags;
/* Inititae N2N login. */
if (test_and_clear_bit(N2N_LOGIN_NEEDED, &vha->dpc_flags)) {
/* borrowing */
u32 *bp, i, sz;
if (N2N_TOPO(ha)) {
if (test_and_clear_bit(N2N_LOGIN_NEEDED, &vha->dpc_flags)) {
/* borrowing */
u32 *bp, i, sz;
memset(ha->init_cb, 0, ha->init_cb_size);
sz = min_t(int, sizeof(struct els_plogi_payload),
ha->init_cb_size);
rval = qla24xx_get_port_login_templ(vha, ha->init_cb_dma,
(void *)ha->init_cb, sz);
if (rval == QLA_SUCCESS) {
bp = (uint32_t *)ha->init_cb;
for (i = 0; i < sz/4 ; i++, bp++)
*bp = cpu_to_be32(*bp);
memset(ha->init_cb, 0, ha->init_cb_size);
sz = min_t(int, sizeof(struct els_plogi_payload),
ha->init_cb_size);
rval = qla24xx_get_port_login_templ(vha,
ha->init_cb_dma, (void *)ha->init_cb, sz);
if (rval == QLA_SUCCESS) {
bp = (uint32_t *)ha->init_cb;
for (i = 0; i < sz/4 ; i++, bp++)
*bp = cpu_to_be32(*bp);
memcpy(&ha->plogi_els_payld.data, (void *)ha->init_cb,
sizeof(ha->plogi_els_payld.data));
set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
} else {
ql_dbg(ql_dbg_init, vha, 0x00d1,
"PLOGI ELS param read fail.\n");
memcpy(&ha->plogi_els_payld.data,
(void *)ha->init_cb,
sizeof(ha->plogi_els_payld.data));
set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
} else {
ql_dbg(ql_dbg_init, vha, 0x00d1,
"PLOGI ELS param read fail.\n");
goto skip_login;
}
}
list_for_each_entry(fcport, &vha->vp_fcports, list) {
if (fcport->n2n_flag) {
qla24xx_fcport_handle_login(vha, fcport);
return QLA_SUCCESS;
}
}
skip_login:
spin_lock_irqsave(&vha->work_lock, flags);
vha->scan.scan_retry++;
spin_unlock_irqrestore(&vha->work_lock, flags);
if (vha->scan.scan_retry < MAX_SCAN_RETRIES) {
set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
}
return QLA_SUCCESS;
}
found_devs = 0;

23
drivers/scsi/qla2xxx/qla_mbx.c
View File

@ -2249,7 +2249,7 @@ qla2x00_lip_reset(scsi_qla_host_t *vha)
mbx_cmd_t mc;
mbx_cmd_t *mcp = &mc;
ql_dbg(ql_dbg_mbx + ql_dbg_verbose, vha, 0x105a,
ql_dbg(ql_dbg_disc, vha, 0x105a,
"Entered %s.\n", __func__);
if (IS_CNA_CAPABLE(vha->hw)) {
@ -3883,14 +3883,23 @@ qla24xx_report_id_acquisition(scsi_qla_host_t *vha,
case TOPO_N2N:
ha->current_topology = ISP_CFG_N;
spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
list_for_each_entry(fcport, &vha->vp_fcports, list) {
fcport->scan_state = QLA_FCPORT_SCAN;
fcport->n2n_flag = 0;
}
fcport = qla2x00_find_fcport_by_wwpn(vha,
rptid_entry->u.f1.port_name, 1);
spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
if (fcport) {
fcport->plogi_nack_done_deadline = jiffies + HZ;
fcport->dm_login_expire = jiffies + 3*HZ;
fcport->dm_login_expire = jiffies + 2*HZ;
fcport->scan_state = QLA_FCPORT_FOUND;
fcport->n2n_flag = 1;
if (vha->flags.nvme_enabled)
fcport->fc4f_nvme = 1;
switch (fcport->disc_state) {
case DSC_DELETED:
set_bit(RELOGIN_NEEDED,
@ -3924,7 +3933,7 @@ qla24xx_report_id_acquisition(scsi_qla_host_t *vha,
rptid_entry->u.f1.port_name,
rptid_entry->u.f1.node_name,
NULL,
FC4_TYPE_UNKNOWN);
FS_FCP_IS_N2N);
}
/* if our portname is higher then initiate N2N login */
@ -4023,6 +4032,7 @@ qla24xx_report_id_acquisition(scsi_qla_host_t *vha,
list_for_each_entry(fcport, &vha->vp_fcports, list) {
fcport->scan_state = QLA_FCPORT_SCAN;
fcport->n2n_flag = 0;
}
fcport = qla2x00_find_fcport_by_wwpn(vha,
@ -4032,6 +4042,13 @@ qla24xx_report_id_acquisition(scsi_qla_host_t *vha,
fcport->login_retry = vha->hw->login_retry_count;
fcport->plogi_nack_done_deadline = jiffies + HZ;
fcport->scan_state = QLA_FCPORT_FOUND;
fcport->n2n_flag = 1;
fcport->d_id.b.domain =
rptid_entry->u.f2.remote_nport_id[2];
fcport->d_id.b.area =
rptid_entry->u.f2.remote_nport_id[1];
fcport->d_id.b.al_pa =
rptid_entry->u.f2.remote_nport_id[0];
}
}
}

4
drivers/scsi/qla2xxx/qla_os.c
View File

@ -5033,6 +5033,10 @@ void qla24xx_create_new_sess(struct scsi_qla_host *vha, struct qla_work_evt *e)
memcpy(fcport->port_name, e->u.new_sess.port_name,
WWN_SIZE);
if (e->u.new_sess.fc4_type & FS_FCP_IS_N2N)
fcport->n2n_flag = 1;
} else {
ql_dbg(ql_dbg_disc, vha, 0xffff,
"%s %8phC mem alloc fail.\n",