qla2xxx: Add Dual mode support in the driver

Add switch to allow both Initiator Mode & Target
mode to operate at the same time.

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index 79b4e88..f67a1c8 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -3389,6 +3389,7 @@ struct qla_hw_data {
 #define FLOGI_SP_SUPPORT        BIT_13
 
        uint8_t         port_no;                /* Physical port of adapter */
+       uint8_t         exch_starvation;
 
        /* Timeout timers. */
        uint8_t         loop_down_abort_time;    /* port down timer */

diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 8b7c046..4c0a2d8 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -1568,8 +1568,7 @@ qla2x00_initialize_adapter(scsi_qla_host_t *vha)
                }
        }
 
-       if (qla_ini_mode_enabled(vha) ||
-               qla_dual_mode_enabled(vha))
+       if (qla_ini_mode_enabled(vha) || qla_dual_mode_enabled(vha))
                rval = qla2x00_init_rings(vha);
 
        ha->flags.chip_reset_done = 1;
@@ -3994,7 +3993,8 @@ qla2x00_configure_loop(scsi_qla_host_t *vha)
                         * Process any ATIO queue entries that came in
                         * while we weren't online.
                         */
-                       if (qla_tgt_mode_enabled(vha)) {
+                       if (qla_tgt_mode_enabled(vha) ||
+                           qla_dual_mode_enabled(vha)) {
                                if (IS_QLA27XX(ha) || IS_QLA83XX(ha)) {
                                        spin_lock_irqsave(&ha->tgt.atio_lock,
                                            flags);

diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index bb747d7..a0a3412 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -1025,7 +1025,8 @@ global_port_update:
 
                qla2x00_mark_all_devices_lost(vha, 1);
 
-               if (vha->vp_idx == 0 && !qla_ini_mode_enabled(vha))
+               if (vha->vp_idx == 0 &&
+                   (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
                        set_bit(SCR_PENDING, &vha->dpc_flags);
 
                set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
@@ -1637,6 +1638,7 @@ qla24xx_logio_entry(scsi_qla_host_t *vha, struct req_que *req,
                    fcport->d_id.b.area, fcport->d_id.b.al_pa,
                    le32_to_cpu(logio->io_parameter[0]));
 
+               vha->hw->exch_starvation = 0;
                data[0] = MBS_COMMAND_COMPLETE;
                if (sp->type != SRB_LOGIN_CMD)
                        goto logio_done;
@@ -1672,6 +1674,21 @@ qla24xx_logio_entry(scsi_qla_host_t *vha, struct req_que *req,
        case LSC_SCODE_NPORT_USED:
                data[0] = MBS_LOOP_ID_USED;
                break;
+       case LSC_SCODE_NOXCB:
+               vha->hw->exch_starvation++;
+               if (vha->hw->exch_starvation > 5) {
+                       ql_log(ql_log_warn, vha, 0xffff,
+                           "Exchange starvation. Resetting RISC\n");
+
+                       vha->hw->exch_starvation = 0;
+
+                       if (IS_P3P_TYPE(vha->hw))
+                               set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
+                       else
+                               set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
+                       qla2xxx_wake_dpc(vha);
+               }
+               /* drop through */
        default:
                data[0] = MBS_COMMAND_ERROR;
                break;

diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c
index e4d7d32..c8f312f 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -55,8 +55,17 @@ MODULE_PARM_DESC(qlini_mode,
        "disabled on enabling target mode and then on disabling target mode "
        "enabled back; "
        "\"disabled\" - initiator mode will never be enabled; "
+       "\"dual\" - Initiator Modes will be enabled. Target Mode can be activated "
+       "when ready "
        "\"enabled\" (default) - initiator mode will always stay enabled.");
 
+static int ql_dm_tgt_ex_pct = 50;
+module_param(ql_dm_tgt_ex_pct, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(ql_dm_tgt_ex_pct,
+       "For Dual Mode (qlini_mode=dual), this parameter determines "
+       "the percentage of exchanges/cmds FW will allocate resources "
+       "for Target mode.");
+
 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
 
 static int temp_sam_status = SAM_STAT_BUSY;
@@ -1295,7 +1304,8 @@ int qlt_stop_phase1(struct qla_tgt *tgt)
        wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 
        /* Big hammer */
-       if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
+       if (!ha->flags.host_shutting_down &&
+           (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
                qlt_disable_vha(vha);
 
        /* Wait for sessions to clear out (just in case) */
@@ -5266,6 +5276,32 @@ void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
                    le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
                break;
 
+       case MBA_REJECTED_FCP_CMD:
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
+                       "qla_target(%d): Async event LS_REJECT occurred "
+                       "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
+                       le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
+                       le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
+
+               if (le16_to_cpu(mailbox[3]) == 1) {
+                       /* exchange starvation. */
+                       vha->hw->exch_starvation++;
+                       if (vha->hw->exch_starvation > 5) {
+                               ql_log(ql_log_warn, vha, 0xffff,
+                                   "Exchange starvation-. Resetting RISC\n");
+
+                               vha->hw->exch_starvation = 0;
+                               if (IS_P3P_TYPE(vha->hw))
+                                       set_bit(FCOE_CTX_RESET_NEEDED,
+                                           &vha->dpc_flags);
+                               else
+                                       set_bit(ISP_ABORT_NEEDED,
+                                           &vha->dpc_flags);
+                               qla2xxx_wake_dpc(vha);
+                       }
+               }
+               break;
+
        case MBA_PORT_UPDATE:
                ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
                    "qla_target(%d): Port update async event %#x "
@@ -5275,10 +5311,11 @@ void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
                    le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
 
                login_code = le16_to_cpu(mailbox[2]);
-               if (login_code == 0x4)
+               if (login_code == 0x4) {
                        ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
                            "Async MB 2: Got PLOGI Complete\n");
-               else if (login_code == 0x7)
+                       vha->hw->exch_starvation = 0;
+               } else if (login_code == 0x7)
                        ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
                            "Async MB 2: Port Logged Out\n");
                break;
@@ -5829,7 +5866,10 @@ static void qlt_set_mode(struct scsi_qla_host *vha)
                vha->host->active_mode = MODE_TARGET;
                break;
        case QLA2XXX_INI_MODE_ENABLED:
-               vha->host->active_mode |= MODE_TARGET;
+               vha->host->active_mode = MODE_UNKNOWN;
+               break;
+       case QLA2XXX_INI_MODE_DUAL:
+               vha->host->active_mode = MODE_DUAL;
                break;
        default:
                break;
@@ -5852,8 +5892,8 @@ static void qlt_clear_mode(struct scsi_qla_host *vha)
                vha->host->active_mode = MODE_INITIATOR;
                break;
        case QLA2XXX_INI_MODE_ENABLED:
-               vha->host->active_mode &= ~MODE_TARGET;
-               vha->host->active_mode |= MODE_INITIATOR;
+       case QLA2XXX_INI_MODE_DUAL:
+               vha->host->active_mode = MODE_INITIATOR;
                break;
        default:
                break;
@@ -5948,9 +5988,6 @@ static void qlt_disable_vha(struct scsi_qla_host *vha)
 void
 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
 {
-       if (!qla_tgt_mode_enabled(vha))
-               return;
-
        vha->vha_tgt.qla_tgt = NULL;
 
        mutex_init(&vha->vha_tgt.tgt_mutex);
@@ -5981,7 +6018,6 @@ qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
                ct_req->req.rff_id.fc4_feature = BIT_1;
        } else if (qla_dual_mode_enabled(vha))
                ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
-
 }
 
 /*
@@ -6000,7 +6036,7 @@ qlt_init_atio_q_entries(struct scsi_qla_host *vha)
        uint16_t cnt;
        struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
 
-       if (!qla_tgt_mode_enabled(vha))
+       if (qla_ini_mode_enabled(vha))
                return;
 
        for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
@@ -6093,8 +6129,10 @@ void
 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
 {
        struct qla_hw_data *ha = vha->hw;
+       u32 tmp;
+       u16 t;
 
-       if (qla_tgt_mode_enabled(vha)) {
+       if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
                if (!ha->tgt.saved_set) {
                        /* We save only once */
                        ha->tgt.saved_exchange_count = nv->exchange_count;
@@ -6107,7 +6145,24 @@ qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
                        ha->tgt.saved_set = 1;
                }
 
-               nv->exchange_count = cpu_to_le16(0xFFFF);
+               if (qla_tgt_mode_enabled(vha)) {
+                       nv->exchange_count = cpu_to_le16(0xFFFF);
+               } else {                        /* dual */
+                       if (ql_dm_tgt_ex_pct > 100) {
+                               ql_dm_tgt_ex_pct = 50;
+                       } else if (ql_dm_tgt_ex_pct == 100) {
+                               /* leave some for FW */
+                               ql_dm_tgt_ex_pct = 95;
+                       }
+
+                       tmp = ha->orig_fw_xcb_count * ql_dm_tgt_ex_pct;
+                       tmp = tmp/100;
+                       if (tmp > 0xffff)
+                               tmp = 0xffff;
+
+                       t = tmp & 0xffff;
+                       nv->exchange_count = cpu_to_le16(t);
+               }
 
                /* Enable target mode */
                nv->firmware_options_1 |= cpu_to_le32(BIT_4);
@@ -6192,11 +6247,13 @@ void
 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
 {
        struct qla_hw_data *ha = vha->hw;
+       u32 tmp;
+       u16 t;
 
        if (!QLA_TGT_MODE_ENABLED())
                return;
 
-       if (qla_tgt_mode_enabled(vha)) {
+       if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
                if (!ha->tgt.saved_set) {
                        /* We save only once */
                        ha->tgt.saved_exchange_count = nv->exchange_count;
@@ -6209,7 +6266,23 @@ qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
                        ha->tgt.saved_set = 1;
                }
 
-               nv->exchange_count = cpu_to_le16(0xFFFF);
+               if (qla_tgt_mode_enabled(vha)) {
+                       nv->exchange_count = cpu_to_le16(0xFFFF);
+               } else {                        /* dual */
+                       if (ql_dm_tgt_ex_pct > 100) {
+                               ql_dm_tgt_ex_pct = 50;
+                       } else if (ql_dm_tgt_ex_pct == 100) {
+                               /* leave some for FW */
+                               ql_dm_tgt_ex_pct = 95;
+                       }
+
+                       tmp = ha->orig_fw_xcb_count * ql_dm_tgt_ex_pct;
+                       tmp = tmp/100;
+                       if (tmp > 0xffff)
+                               tmp = 0xffff;
+                       t = tmp & 0xffff;
+                       nv->exchange_count = cpu_to_le16(t);
+               }
 
                /* Enable target mode */
                nv->firmware_options_1 |= cpu_to_le32(BIT_4);
@@ -6319,10 +6392,11 @@ void
 qlt_modify_vp_config(struct scsi_qla_host *vha,
        struct vp_config_entry_24xx *vpmod)
 {
-       if (qla_tgt_mode_enabled(vha))
+       /* enable target mode.  Bit5 = 1 => disable */
+       if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
                vpmod->options_idx1 &= ~BIT_5;
 
-       /* Disable ini mode, if requested. */
+       /* Disable ini mode, if requested.  bit4 = 1 => disable */
        if (qla_tgt_mode_enabled(vha))
                vpmod->options_idx1 &= ~BIT_4;
 }
@@ -6477,6 +6551,8 @@ static int __init qlt_parse_ini_mode(void)
                ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
        else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
                ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
+       else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
+               ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
        else
                return false;
 

diff --git a/drivers/scsi/qla2xxx/qla_target.h b/drivers/scsi/qla2xxx/qla_target.h
index 5e56192..ac86b37 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_target.h
+++ b/drivers/scsi/qla2xxx/qla_target.h
@@ -45,10 +45,12 @@
 #define QLA2XXX_INI_MODE_STR_EXCLUSIVE "exclusive"
 #define QLA2XXX_INI_MODE_STR_DISABLED  "disabled"
 #define QLA2XXX_INI_MODE_STR_ENABLED   "enabled"
+#define QLA2XXX_INI_MODE_STR_DUAL              "dual"
 
 #define QLA2XXX_INI_MODE_EXCLUSIVE     0
 #define QLA2XXX_INI_MODE_DISABLED      1
 #define QLA2XXX_INI_MODE_ENABLED       2
+#define QLA2XXX_INI_MODE_DUAL  3
 
 #define QLA2XXX_COMMAND_COUNT_INIT     250
 #define QLA2XXX_IMMED_NOTIFY_COUNT_INIT 250
@@ -975,6 +977,7 @@ extern void qlt_update_vp_map(struct scsi_qla_host *, int);
  * is not set. Right now, ha value is ignored.
  */
 #define QLA_TGT_MODE_ENABLED() (ql2x_ini_mode != QLA2XXX_INI_MODE_ENABLED)
+
 extern int ql2x_ini_mode;
 
 static inline bool qla_tgt_mode_enabled(struct scsi_qla_host *ha)

diff --git a/drivers/scsi/qla2xxx/tcm_qla2xxx.c b/drivers/scsi/qla2xxx/tcm_qla2xxx.c
index e37d7ee..8b878a2 100644 (file)
--- a/drivers/scsi/qla2xxx/tcm_qla2xxx.c
+++ b/drivers/scsi/qla2xxx/tcm_qla2xxx.c
@@ -1744,7 +1744,7 @@ static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
                        (struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
        struct fc_vport_identifiers vport_id;
 
-       if (!qla_tgt_mode_enabled(base_vha)) {
+       if (qla_ini_mode_enabled(base_vha)) {
                pr_err("qla2xxx base_vha not enabled for target mode\n");
                return -EPERM;
        }