[SCSI] mpt fusion: Added support for Broadcast primitives Event handling

Firmware is able to handle Broadcast primitives, but upstream driver does not
have support for broadcast primitive handling. Now this patch is mainly to
support broadcast primitives.
Signed-off-by: NKashyap Desai <kadesai@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

drivers/message/fusion/mptbase.h

@@ -758,6 +758,7 @@ typedef struct _MPT_ADAPTER
 	struct scsi_cmnd	**ScsiLookup;
 	spinlock_t		  scsi_lookup_lock;
 	u64			dma_mask;
+	u32			  broadcast_aen_busy;
 	char			 reset_work_q_name[MPT_KOBJ_NAME_LEN];
 	struct workqueue_struct *reset_work_q;
 	struct delayed_work	 fault_reset_work;

drivers/message/fusion/mptsas.c

@@ -121,6 +121,7 @@ static void mptsas_expander_delete(MPT_ADAPTER *ioc,
 static void mptsas_send_expander_event(struct fw_event_work *fw_event);
 static void mptsas_not_responding_devices(MPT_ADAPTER *ioc);
 static void mptsas_scan_sas_topology(MPT_ADAPTER *ioc);
+static void mptsas_broadcast_primative_work(struct fw_event_work *fw_event);
 static void mptsas_handle_queue_full_event(struct fw_event_work *fw_event);
 static void mptsas_volume_delete(MPT_ADAPTER *ioc, u8 id);
 
@@ -287,6 +288,21 @@ mptsas_add_fw_event(MPT_ADAPTER *ioc, struct fw_event_work *fw_event,
 	spin_unlock_irqrestore(&ioc->fw_event_lock, flags);
 }
 
+/* requeue a sas firmware event */
+static void
+mptsas_requeue_fw_event(MPT_ADAPTER *ioc, struct fw_event_work *fw_event,
+    unsigned long delay)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&ioc->fw_event_lock, flags);
+	devtprintk(ioc, printk(MYIOC_s_DEBUG_FMT "%s: reschedule task "
+	    "(fw_event=0x%p)\n", ioc->name, __func__, fw_event));
+	fw_event->retries++;
+	queue_delayed_work(ioc->fw_event_q, &fw_event->work,
+	    msecs_to_jiffies(delay));
+	spin_unlock_irqrestore(&ioc->fw_event_lock, flags);
+}
+
 /* free memory assoicated to a sas firmware event */
 static void
 mptsas_free_fw_event(MPT_ADAPTER *ioc, struct fw_event_work *fw_event)
@@ -1606,6 +1622,9 @@ mptsas_firmware_event_work(struct work_struct *work)
 		    MPI_SAS_OP_CLEAR_NOT_PRESENT);
 		mptsas_free_fw_event(ioc, fw_event);
 		break;
+	case MPI_EVENT_SAS_BROADCAST_PRIMITIVE:
+		mptsas_broadcast_primative_work(fw_event);
+		break;
 	case MPI_EVENT_SAS_EXPANDER_STATUS_CHANGE:
 		mptsas_send_expander_event(fw_event);
 		break;
@@ -4325,6 +4344,182 @@ mptsas_send_raid_event(struct fw_event_work *fw_event)
 		mptsas_free_fw_event(ioc, fw_event);
 }
 
+/**
+ *	mptsas_issue_tm - send mptsas internal tm request
+ *	@ioc: Pointer to MPT_ADAPTER structure
+ *	@type: Task Management type
+ *	@channel: channel number for task management
+ *	@id: Logical Target ID for reset (if appropriate)
+ *	@lun: Logical unit for reset (if appropriate)
+ *	@task_context: Context for the task to be aborted
+ *	@timeout: timeout for task management control
+ *
+ *	return 0 on success and -1 on failure:
+ *
+ */
+static int
+mptsas_issue_tm(MPT_ADAPTER *ioc, u8 type, u8 channel, u8 id, u64 lun,
+	int task_context, ulong timeout, u8 *issue_reset)
+{
+	MPT_FRAME_HDR	*mf;
+	SCSITaskMgmt_t	*pScsiTm;
+	int		 retval;
+	unsigned long	 timeleft;
+
+	*issue_reset = 0;
+	mf = mpt_get_msg_frame(mptsasDeviceResetCtx, ioc);
+	if (mf == NULL) {
+		retval = -1; /* return failure */
+		dtmprintk(ioc, printk(MYIOC_s_WARN_FMT "TaskMgmt request: no "
+		    "msg frames!!\n", ioc->name));
+		goto out;
+	}
+
+	dtmprintk(ioc, printk(MYIOC_s_DEBUG_FMT "TaskMgmt request: mr = %p, "
+	    "task_type = 0x%02X,\n\t timeout = %ld, fw_channel = %d, "
+	    "fw_id = %d, lun = %lld,\n\t task_context = 0x%x\n", ioc->name, mf,
+	     type, timeout, channel, id, (unsigned long long)lun,
+	     task_context));
+
+	pScsiTm = (SCSITaskMgmt_t *) mf;
+	memset(pScsiTm, 0, sizeof(SCSITaskMgmt_t));
+	pScsiTm->Function = MPI_FUNCTION_SCSI_TASK_MGMT;
+	pScsiTm->TaskType = type;
+	pScsiTm->MsgFlags = 0;
+	pScsiTm->TargetID = id;
+	pScsiTm->Bus = channel;
+	pScsiTm->ChainOffset = 0;
+	pScsiTm->Reserved = 0;
+	pScsiTm->Reserved1 = 0;
+	pScsiTm->TaskMsgContext = task_context;
+	int_to_scsilun(lun, (struct scsi_lun *)pScsiTm->LUN);
+
+	INITIALIZE_MGMT_STATUS(ioc->taskmgmt_cmds.status)
+	CLEAR_MGMT_STATUS(ioc->internal_cmds.status)
+	retval = 0;
+	mpt_put_msg_frame_hi_pri(mptsasDeviceResetCtx, ioc, mf);
+
+	/* Now wait for the command to complete */
+	timeleft = wait_for_completion_timeout(&ioc->taskmgmt_cmds.done,
+	    timeout*HZ);
+	if (!(ioc->taskmgmt_cmds.status & MPT_MGMT_STATUS_COMMAND_GOOD)) {
+		retval = -1; /* return failure */
+		dtmprintk(ioc, printk(MYIOC_s_ERR_FMT
+		    "TaskMgmt request: TIMED OUT!(mr=%p)\n", ioc->name, mf));
+		mpt_free_msg_frame(ioc, mf);
+		if (ioc->taskmgmt_cmds.status & MPT_MGMT_STATUS_DID_IOCRESET)
+			goto out;
+		*issue_reset = 1;
+		goto out;
+	}
+
+	if (!(ioc->taskmgmt_cmds.status & MPT_MGMT_STATUS_RF_VALID)) {
+		retval = -1; /* return failure */
+		dtmprintk(ioc, printk(MYIOC_s_DEBUG_FMT
+		    "TaskMgmt request: failed with no reply\n", ioc->name));
+		goto out;
+	}
+
+ out:
+	CLEAR_MGMT_STATUS(ioc->taskmgmt_cmds.status)
+	return retval;
+}
+
+/**
+ *	mptsas_broadcast_primative_work - Handle broadcast primitives
+ *	@work: work queue payload containing info describing the event
+ *
+ *	this will be handled in workqueue context.
+ */
+static void
+mptsas_broadcast_primative_work(struct fw_event_work *fw_event)
+{
+	MPT_ADAPTER *ioc = fw_event->ioc;
+	MPT_FRAME_HDR	*mf;
+	VirtDevice	*vdevice;
+	int			ii;
+	struct scsi_cmnd	*sc;
+	SCSITaskMgmtReply_t	*pScsiTmReply;
+	u8			issue_reset;
+	int			task_context;
+	u8			channel, id;
+	int			 lun;
+	u32			 termination_count;
+	u32			 query_count;
+
+	dtmprintk(ioc, printk(MYIOC_s_DEBUG_FMT
+	    "%s - enter\n", ioc->name, __func__));
+
+	mutex_lock(&ioc->taskmgmt_cmds.mutex);
+	if (mpt_set_taskmgmt_in_progress_flag(ioc) != 0) {
+		mutex_unlock(&ioc->taskmgmt_cmds.mutex);
+		mptsas_requeue_fw_event(ioc, fw_event, 1000);
+		return;
+	}
+
+	issue_reset = 0;
+	termination_count = 0;
+	query_count = 0;
+	mpt_findImVolumes(ioc);
+	pScsiTmReply = (SCSITaskMgmtReply_t *) ioc->taskmgmt_cmds.reply;
+
+	for (ii = 0; ii < ioc->req_depth; ii++) {
+		if (ioc->fw_events_off)
+			goto out;
+		sc = mptscsih_get_scsi_lookup(ioc, ii);
+		if (!sc)
+			continue;
+		mf = MPT_INDEX_2_MFPTR(ioc, ii);
+		if (!mf)
+			continue;
+		task_context = mf->u.frame.hwhdr.msgctxu.MsgContext;
+		vdevice = sc->device->hostdata;
+		if (!vdevice || !vdevice->vtarget)
+			continue;
+		if (vdevice->vtarget->tflags & MPT_TARGET_FLAGS_RAID_COMPONENT)
+			continue; /* skip hidden raid components */
+		if (vdevice->vtarget->raidVolume)
+			continue; /* skip hidden raid components */
+		channel = vdevice->vtarget->channel;
+		id = vdevice->vtarget->id;
+		lun = vdevice->lun;
+		if (mptsas_issue_tm(ioc, MPI_SCSITASKMGMT_TASKTYPE_QUERY_TASK,
+		    channel, id, (u64)lun, task_context, 30, &issue_reset))
+			goto out;
+		query_count++;
+		termination_count +=
+		    le32_to_cpu(pScsiTmReply->TerminationCount);
+		if ((pScsiTmReply->IOCStatus == MPI_IOCSTATUS_SUCCESS) &&
+		    (pScsiTmReply->ResponseCode ==
+		    MPI_SCSITASKMGMT_RSP_TM_SUCCEEDED ||
+		    pScsiTmReply->ResponseCode ==
+		    MPI_SCSITASKMGMT_RSP_IO_QUEUED_ON_IOC))
+			continue;
+		if (mptsas_issue_tm(ioc,
+		    MPI_SCSITASKMGMT_TASKTYPE_ABRT_TASK_SET,
+		    channel, id, (u64)lun, 0, 30, &issue_reset))
+			goto out;
+		termination_count +=
+		    le32_to_cpu(pScsiTmReply->TerminationCount);
+	}
+
+ out:
+	dtmprintk(ioc, printk(MYIOC_s_DEBUG_FMT
+	    "%s - exit, query_count = %d termination_count = %d\n",
+	    ioc->name, __func__, query_count, termination_count));
+
+	ioc->broadcast_aen_busy = 0;
+	mpt_clear_taskmgmt_in_progress_flag(ioc);
+	mutex_unlock(&ioc->taskmgmt_cmds.mutex);
+
+	if (issue_reset) {
+		printk(MYIOC_s_WARN_FMT "Issuing Reset from %s!!\n",
+		    ioc->name, __func__);
+		mpt_HardResetHandler(ioc, CAN_SLEEP);
+	}
+	mptsas_free_fw_event(ioc, fw_event);
+}
+
 /*
  * mptsas_send_ir2_event - handle exposing hidden disk when
  * an inactive raid volume is added
@@ -4388,6 +4583,18 @@ mptsas_event_process(MPT_ADAPTER *ioc, EventNotificationReply_t *reply)
 
 	delay = msecs_to_jiffies(1);
 	switch (event) {
+	case MPI_EVENT_SAS_BROADCAST_PRIMITIVE:
+	{
+		EVENT_DATA_SAS_BROADCAST_PRIMITIVE *broadcast_event_data =
+		    (EVENT_DATA_SAS_BROADCAST_PRIMITIVE *)reply->Data;
+		if (broadcast_event_data->Primitive !=
+		    MPI_EVENT_PRIMITIVE_ASYNCHRONOUS_EVENT)
+			return 0;
+		if (ioc->broadcast_aen_busy)
+			return 0;
+		ioc->broadcast_aen_busy = 1;
+		break;
+	}
 	case MPI_EVENT_SAS_DEVICE_STATUS_CHANGE:
 	{
 		EVENT_DATA_SAS_DEVICE_STATUS_CHANGE *sas_event_data =

drivers/message/fusion/mptscsih.c

@@ -80,6 +80,7 @@ MODULE_VERSION(my_VERSION);
 /*
  *  Other private/forward protos...
  */
+struct scsi_cmnd	*mptscsih_get_scsi_lookup(MPT_ADAPTER *ioc, int i);
 static struct scsi_cmnd * mptscsih_getclear_scsi_lookup(MPT_ADAPTER *ioc, int i);
 static void	mptscsih_set_scsi_lookup(MPT_ADAPTER *ioc, int i, struct scsi_cmnd *scmd);
 static int	SCPNT_TO_LOOKUP_IDX(MPT_ADAPTER *ioc, struct scsi_cmnd *scmd);
@@ -2419,6 +2420,26 @@ mptscsih_copy_sense_data(struct scsi_cmnd *sc, MPT_SCSI_HOST *hd, MPT_FRAME_HDR
 	}
 }
 
+/**
+ * mptscsih_get_scsi_lookup - retrieves scmd entry
+ * @ioc: Pointer to MPT_ADAPTER structure
+ * @i: index into the array
+ *
+ * Returns the scsi_cmd pointer
+ */
+struct scsi_cmnd *
+mptscsih_get_scsi_lookup(MPT_ADAPTER *ioc, int i)
+{
+	unsigned long	flags;
+	struct scsi_cmnd *scmd;
+
+	spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
+	scmd = ioc->ScsiLookup[i];
+	spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
+
+	return scmd;
+}
+EXPORT_SYMBOL(mptscsih_get_scsi_lookup);
 
 /**
  * mptscsih_getclear_scsi_lookup

drivers/message/fusion/mptscsih.h

@@ -133,4 +133,5 @@ extern void mptscsih_timer_expired(unsigned long data);
 extern u8 mptscsih_raid_id_to_num(MPT_ADAPTER *ioc, u8 channel, u8 id);
 extern int mptscsih_is_phys_disk(MPT_ADAPTER *ioc, u8 channel, u8 id);
 extern struct device_attribute *mptscsih_host_attrs[];
+extern struct scsi_cmnd	*mptscsih_get_scsi_lookup(MPT_ADAPTER *ioc, int i);
 extern void mptscsih_taskmgmt_response_code(MPT_ADAPTER *ioc, u8 response_code);