[SCSI] qla2xxx: Support for asynchronous TM and Marker IOCBs.

Currently we can only issue the task management (TM)
commands via the mailbox mechanism. This is a limitation,
since only one mailbox command can be issued at a time.
The purpose of this effort is to provide support for
issuing and processing the respose to TM and Marker
IOCBs asynchronously. Towards achieving this, the
consolidated srb architecture that is currently used for
BSG and IOCB/Logio commands has been enhanced and used.

Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 152 insertions, 4 deletions

diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 72b4ef270158..e78089ded517 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -125,7 +125,7 @@ done:
 #define ELS_TMO_2_RATOV(ha) ((ha)->r_a_tov / 10 * 2)
 
 static void
-qla2x00_async_logio_timeout(srb_t *sp)
+qla2x00_async_iocb_timeout(srb_t *sp)
 {
         fc_port_t *fcport = sp->fcport;
         struct srb_ctx *ctx = sp->ctx;
@@ -170,7 +170,7 @@ qla2x00_async_login(struct scsi_qla_host *vha, fc_port_t *fcport,
         ctx->type = SRB_LOGIN_CMD;
         ctx->name = "login";
         lio = ctx->u.iocb_cmd;
-        lio->timeout = qla2x00_async_logio_timeout;
+        lio->timeout = qla2x00_async_iocb_timeout;
         lio->done = qla2x00_async_login_ctx_done;
         lio->u.logio.flags |= SRB_LOGIN_COND_PLOGI;
         if (data[1] & QLA_LOGIO_LOGIN_RETRIED)
@@ -222,7 +222,7 @@ qla2x00_async_logout(struct scsi_qla_host *vha, fc_port_t *fcport)
         ctx->type = SRB_LOGOUT_CMD;
         ctx->name = "logout";
         lio = ctx->u.iocb_cmd;
-        lio->timeout = qla2x00_async_logio_timeout;
+        lio->timeout = qla2x00_async_iocb_timeout;
         lio->done = qla2x00_async_logout_ctx_done;
         rval = qla2x00_start_sp(sp);
         if (rval != QLA_SUCCESS)
@@ -271,7 +271,7 @@ qla2x00_async_adisc(struct scsi_qla_host *vha, fc_port_t *fcport,
         ctx->type = SRB_ADISC_CMD;
         ctx->name = "adisc";
         lio = ctx->u.iocb_cmd;
-        lio->timeout = qla2x00_async_logio_timeout;
+        lio->timeout = qla2x00_async_iocb_timeout;
         lio->done = qla2x00_async_adisc_ctx_done;
         if (data[1] & QLA_LOGIO_LOGIN_RETRIED)
                 lio->u.logio.flags |= SRB_LOGIN_RETRIED;
@@ -292,6 +292,112 @@ done:
         return rval;
 }
 
+static void
+qla2x00_async_tm_cmd_ctx_done(srb_t *sp)
+{
+        struct srb_ctx *ctx = sp->ctx;
+        struct srb_iocb *iocb = (struct srb_iocb *)ctx->u.iocb_cmd;
+
+        qla2x00_async_tm_cmd_done(sp->fcport->vha, sp->fcport, iocb);
+        iocb->free(sp);
+}
+
+int
+qla2x00_async_tm_cmd(fc_port_t *fcport, uint32_t flags, uint32_t lun,
+        uint32_t tag)
+{
+        struct scsi_qla_host *vha = fcport->vha;
+        struct qla_hw_data *ha = vha->hw;
+        srb_t *sp;
+        struct srb_ctx *ctx;
+        struct srb_iocb *tcf;
+        int rval;
+
+        rval = QLA_FUNCTION_FAILED;
+        sp = qla2x00_get_ctx_sp(vha, fcport, sizeof(struct srb_ctx),
+            ELS_TMO_2_RATOV(ha) + 2);
+        if (!sp)
+                goto done;
+
+        ctx = sp->ctx;
+        ctx->type = SRB_TM_CMD;
+        ctx->name = "tmf";
+        tcf = ctx->u.iocb_cmd;
+        tcf->u.tmf.flags = flags;
+        tcf->u.tmf.lun = lun;
+        tcf->u.tmf.data = tag;
+        tcf->timeout = qla2x00_async_iocb_timeout;
+        tcf->done = qla2x00_async_tm_cmd_ctx_done;
+
+        rval = qla2x00_start_sp(sp);
+        if (rval != QLA_SUCCESS)
+                goto done_free_sp;
+
+        DEBUG2(printk(KERN_DEBUG
+            "scsi(%ld:%x): Async-tmf - loop-id=%x portid=%02x%02x%02x.\n",
+            fcport->vha->host_no, sp->handle, fcport->loop_id,
+            fcport->d_id.b.domain, fcport->d_id.b.area, fcport->d_id.b.al_pa));
+
+        return rval;
+
+done_free_sp:
+        tcf->free(sp);
+done:
+        return rval;
+}
+
+static void
+qla2x00_async_marker_ctx_done(srb_t *sp)
+{
+        struct srb_ctx *ctx = sp->ctx;
+        struct srb_iocb *iocb = (struct srb_iocb *)ctx->u.iocb_cmd;
+
+        qla2x00_async_marker_done(sp->fcport->vha, sp->fcport, iocb);
+        iocb->free(sp);
+}
+
+int
+qla2x00_async_marker(fc_port_t *fcport, uint16_t lun, uint8_t modif)
+{
+        struct scsi_qla_host *vha = fcport->vha;
+        srb_t *sp;
+        struct srb_ctx *ctx;
+        struct srb_iocb *mrk;
+        int rval;
+
+        rval = QLA_FUNCTION_FAILED;
+        sp = qla2x00_get_ctx_sp(vha, fcport, sizeof(struct srb_ctx), 0);
+        if (!sp)
+                goto done;
+
+        ctx = sp->ctx;
+        ctx->type = SRB_MARKER_CMD;
+        ctx->name = "marker";
+        mrk = ctx->u.iocb_cmd;
+        mrk->u.marker.lun = lun;
+        mrk->u.marker.modif = modif;
+        mrk->timeout = qla2x00_async_iocb_timeout;
+        mrk->done = qla2x00_async_marker_ctx_done;
+
+        rval = qla2x00_start_sp(sp);
+        if (rval != QLA_SUCCESS)
+                goto done_free_sp;
+
+        DEBUG2(printk(KERN_DEBUG
+            "scsi(%ld:%x): Async-marker - loop-id=%x "
+            "portid=%02x%02x%02x.\n",
+            fcport->vha->host_no, sp->handle, fcport->loop_id,
+            fcport->d_id.b.domain, fcport->d_id.b.area,
+            fcport->d_id.b.al_pa));
+
+        return rval;
+
+done_free_sp:
+        mrk->free(sp);
+done:
+        return rval;
+}
+
 void
 qla2x00_async_login_done(struct scsi_qla_host *vha, fc_port_t *fcport,
     uint16_t *data)
@@ -360,6 +466,48 @@ qla2x00_async_adisc_done(struct scsi_qla_host *vha, fc_port_t *fcport,
         return;
 }
 
+void
+qla2x00_async_tm_cmd_done(struct scsi_qla_host *vha, fc_port_t *fcport,
+    struct srb_iocb *iocb)
+{
+        int rval;
+        uint32_t flags;
+        uint16_t lun;
+
+        flags = iocb->u.tmf.flags;
+        lun = (uint16_t)iocb->u.tmf.lun;
+
+        /* Issue Marker IOCB */
+        rval = qla2x00_async_marker(fcport, lun,
+                flags == TCF_LUN_RESET ? MK_SYNC_ID_LUN : MK_SYNC_ID);
+
+        if ((rval != QLA_SUCCESS) || iocb->u.tmf.data) {
+                DEBUG2_3_11(printk(KERN_WARNING
+                        "%s(%ld): TM IOCB failed (%x).\n",
+                        __func__, vha->host_no, rval));
+        }
+
+        return;
+}
+
+void
+qla2x00_async_marker_done(struct scsi_qla_host *vha, fc_port_t *fcport,
+    struct srb_iocb *iocb)
+{
+        /*
+         * Currently we dont have any specific post response processing
+         * for this IOCB. We'll just return success or failed
+         * depending on whether the IOCB command succeeded or failed.
+         */
+        if (iocb->u.tmf.data) {
+                DEBUG2_3_11(printk(KERN_WARNING
+                    "%s(%ld): Marker IOCB failed (%x).\n",
+                    __func__, vha->host_no, iocb->u.tmf.data));
+        }
+
+        return;
+}
+
 /****************************************************************************/
 /*                QLogic ISP2x00 Hardware Support Functions.                */
 /****************************************************************************/