scsi: mpi3mr: Get target object based on rphy

When device is registered with the STL then get the corresponding device's
target object using the rphy in below callback functions:

 - mpi3mr_target_alloc()

 - mpi3mr_slave_alloc()

 - mpi3mr_slave_configure()

 - mpi3mr_slave_destroy()

Link: https://lore.kernel.org/r/20220804131226.16653-11-sreekanth.reddy@broadcom.comReviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/mpi3mr/mpi3mr.h

@@ -997,6 +997,7 @@ struct scmd_priv {
  * @cfg_page_dma: Configuration page DMA address
  * @cfg_page_sz: Default configuration page memory size
  * @sas_transport_enabled: SAS transport enabled or not
+ * @scsi_device_channel: Channel ID for SCSI devices
  * @sas_hba: SAS node for the controller
  * @sas_expander_list: SAS node list of expanders
  * @sas_node_lock: Lock to protect SAS node list
@@ -1180,6 +1181,7 @@ struct mpi3mr_ioc {
 	u16 cfg_page_sz;
 
 	u8 sas_transport_enabled;
+	u8 scsi_device_channel;
 	struct mpi3mr_sas_node sas_hba;
 	struct list_head sas_expander_list;
 	spinlock_t sas_node_lock;
@@ -1355,6 +1357,8 @@ void mpi3mr_update_links(struct mpi3mr_ioc *mrioc,
 	struct mpi3mr_hba_port *hba_port);
 void mpi3mr_remove_tgtdev_from_host(struct mpi3mr_ioc *mrioc,
 	struct mpi3mr_tgt_dev *tgtdev);
+struct mpi3mr_tgt_dev *__mpi3mr_get_tgtdev_by_addr_and_rphy(
+	struct mpi3mr_ioc *mrioc, u64 sas_address, struct sas_rphy *rphy);
 void mpi3mr_print_device_event_notice(struct mpi3mr_ioc *mrioc,
 	bool device_add);
 #endif /*MPI3MR_H_INCLUDED*/

drivers/scsi/mpi3mr/mpi3mr_fw.c

@@ -3745,6 +3745,8 @@ int mpi3mr_init_ioc(struct mpi3mr_ioc *mrioc)
 	if (!(mrioc->facts.ioc_capabilities &
 	    MPI3_IOCFACTS_CAPABILITY_MULTIPATH_ENABLED)) {
 		mrioc->sas_transport_enabled = 1;
+		mrioc->scsi_device_channel = 1;
+		mrioc->shost->max_channel = 1;
 	}
 
 	mrioc->reply_sz = mrioc->facts.reply_sz;

drivers/scsi/mpi3mr/mpi3mr_os.c

@@ -4023,9 +4023,10 @@ static void mpi3mr_slave_destroy(struct scsi_device *sdev)
 	struct Scsi_Host *shost;
 	struct mpi3mr_ioc *mrioc;
 	struct mpi3mr_stgt_priv_data *scsi_tgt_priv_data;
-	struct mpi3mr_tgt_dev *tgt_dev;
+	struct mpi3mr_tgt_dev *tgt_dev = NULL;
 	unsigned long flags;
 	struct scsi_target *starget;
+	struct sas_rphy *rphy = NULL;
 
 	if (!sdev->hostdata)
 		return;
@@ -4038,7 +4039,14 @@ static void mpi3mr_slave_destroy(struct scsi_device *sdev)
 	scsi_tgt_priv_data->num_luns--;
 
 	spin_lock_irqsave(&mrioc->tgtdev_lock, flags);
-	tgt_dev = __mpi3mr_get_tgtdev_by_perst_id(mrioc, starget->id);
+	if (starget->channel == mrioc->scsi_device_channel)
+		tgt_dev = __mpi3mr_get_tgtdev_by_perst_id(mrioc, starget->id);
+	else if (mrioc->sas_transport_enabled && !starget->channel) {
+		rphy = dev_to_rphy(starget->dev.parent);
+		tgt_dev = __mpi3mr_get_tgtdev_by_addr_and_rphy(mrioc,
+		    rphy->identify.sas_address, rphy);
+	}
+
 	if (tgt_dev && (!scsi_tgt_priv_data->num_luns))
 		tgt_dev->starget = NULL;
 	if (tgt_dev)
@@ -4103,16 +4111,23 @@ static int mpi3mr_slave_configure(struct scsi_device *sdev)
 	struct scsi_target *starget;
 	struct Scsi_Host *shost;
 	struct mpi3mr_ioc *mrioc;
-	struct mpi3mr_tgt_dev *tgt_dev;
+	struct mpi3mr_tgt_dev *tgt_dev = NULL;
 	unsigned long flags;
 	int retval = 0;
+	struct sas_rphy *rphy = NULL;
 
 	starget = scsi_target(sdev);
 	shost = dev_to_shost(&starget->dev);
 	mrioc = shost_priv(shost);
 
 	spin_lock_irqsave(&mrioc->tgtdev_lock, flags);
-	tgt_dev = __mpi3mr_get_tgtdev_by_perst_id(mrioc, starget->id);
+	if (starget->channel == mrioc->scsi_device_channel)
+		tgt_dev = __mpi3mr_get_tgtdev_by_perst_id(mrioc, starget->id);
+	else if (mrioc->sas_transport_enabled && !starget->channel) {
+		rphy = dev_to_rphy(starget->dev.parent);
+		tgt_dev = __mpi3mr_get_tgtdev_by_addr_and_rphy(mrioc,
+		    rphy->identify.sas_address, rphy);
+	}
 	spin_unlock_irqrestore(&mrioc->tgtdev_lock, flags);
 	if (!tgt_dev)
 		return -ENXIO;
@@ -4160,11 +4175,12 @@ static int mpi3mr_slave_alloc(struct scsi_device *sdev)
 	struct Scsi_Host *shost;
 	struct mpi3mr_ioc *mrioc;
 	struct mpi3mr_stgt_priv_data *scsi_tgt_priv_data;
-	struct mpi3mr_tgt_dev *tgt_dev;
+	struct mpi3mr_tgt_dev *tgt_dev = NULL;
 	struct mpi3mr_sdev_priv_data *scsi_dev_priv_data;
 	unsigned long flags;
 	struct scsi_target *starget;
 	int retval = 0;
+	struct sas_rphy *rphy = NULL;
 
 	starget = scsi_target(sdev);
 	shost = dev_to_shost(&starget->dev);
@@ -4172,7 +4188,14 @@ static int mpi3mr_slave_alloc(struct scsi_device *sdev)
 	scsi_tgt_priv_data = starget->hostdata;
 
 	spin_lock_irqsave(&mrioc->tgtdev_lock, flags);
-	tgt_dev = __mpi3mr_get_tgtdev_by_perst_id(mrioc, starget->id);
+
+	if (starget->channel == mrioc->scsi_device_channel)
+		tgt_dev = __mpi3mr_get_tgtdev_by_perst_id(mrioc, starget->id);
+	else if (mrioc->sas_transport_enabled && !starget->channel) {
+		rphy = dev_to_rphy(starget->dev.parent);
+		tgt_dev = __mpi3mr_get_tgtdev_by_addr_and_rphy(mrioc,
+		    rphy->identify.sas_address, rphy);
+	}
 
 	if (tgt_dev) {
 		if (tgt_dev->starget == NULL)
@@ -4215,6 +4238,8 @@ static int mpi3mr_target_alloc(struct scsi_target *starget)
 	struct mpi3mr_tgt_dev *tgt_dev;
 	unsigned long flags;
 	int retval = 0;
+	struct sas_rphy *rphy = NULL;
+	bool update_stgt_priv_data = false;
 
 	scsi_tgt_priv_data = kzalloc(sizeof(*scsi_tgt_priv_data), GFP_KERNEL);
 	if (!scsi_tgt_priv_data)
@@ -4223,8 +4248,25 @@ static int mpi3mr_target_alloc(struct scsi_target *starget)
 	starget->hostdata = scsi_tgt_priv_data;
 
 	spin_lock_irqsave(&mrioc->tgtdev_lock, flags);
-	tgt_dev = __mpi3mr_get_tgtdev_by_perst_id(mrioc, starget->id);
-	if (tgt_dev && !tgt_dev->is_hidden) {
+
+	if (starget->channel == mrioc->scsi_device_channel) {
+		tgt_dev = __mpi3mr_get_tgtdev_by_perst_id(mrioc, starget->id);
+		if (tgt_dev && !tgt_dev->is_hidden)
+			update_stgt_priv_data = true;
+		else
+			retval = -ENXIO;
+	} else if (mrioc->sas_transport_enabled && !starget->channel) {
+		rphy = dev_to_rphy(starget->dev.parent);
+		tgt_dev = __mpi3mr_get_tgtdev_by_addr_and_rphy(mrioc,
+		    rphy->identify.sas_address, rphy);
+		if (tgt_dev && !tgt_dev->is_hidden && !tgt_dev->non_stl &&
+		    (tgt_dev->dev_type == MPI3_DEVICE_DEVFORM_SAS_SATA))
+			update_stgt_priv_data = true;
+		else
+			retval = -ENXIO;
+	}
+
+	if (update_stgt_priv_data) {
 		scsi_tgt_priv_data->starget = starget;
 		scsi_tgt_priv_data->dev_handle = tgt_dev->dev_handle;
 		scsi_tgt_priv_data->perst_id = tgt_dev->perst_id;
@@ -4238,8 +4280,7 @@ static int mpi3mr_target_alloc(struct scsi_target *starget)
 		if (tgt_dev->dev_type == MPI3_DEVICE_DEVFORM_VD)
 			scsi_tgt_priv_data->throttle_group =
 			    tgt_dev->dev_spec.vd_inf.tg;
-	} else
-		retval = -ENXIO;
+	}
 	spin_unlock_irqrestore(&mrioc->tgtdev_lock, flags);
 
 	return retval;

drivers/scsi/mpi3mr/mpi3mr_transport.c

@@ -198,6 +198,35 @@ static void mpi3mr_remove_device_by_sas_address(struct mpi3mr_ioc *mrioc,
 	}
 }
 
+/**
+ * __mpi3mr_get_tgtdev_by_addr_and_rphy - target device search
+ * @mrioc: Adapter instance reference
+ * @sas_address: SAS address of the device
+ * @rphy: SAS transport layer rphy object
+ *
+ * This searches for target device from sas address and rphy
+ * pointer then return mpi3mr_tgt_dev object.
+ *
+ * Return: Valid tget_dev or NULL
+ */
+struct mpi3mr_tgt_dev *__mpi3mr_get_tgtdev_by_addr_and_rphy(
+	struct mpi3mr_ioc *mrioc, u64 sas_address, struct sas_rphy *rphy)
+{
+	struct mpi3mr_tgt_dev *tgtdev;
+
+	assert_spin_locked(&mrioc->tgtdev_lock);
+
+	list_for_each_entry(tgtdev, &mrioc->tgtdev_list, list)
+		if ((tgtdev->dev_type == MPI3_DEVICE_DEVFORM_SAS_SATA) &&
+		    (tgtdev->dev_spec.sas_sata_inf.sas_address == sas_address)
+		    && (tgtdev->dev_spec.sas_sata_inf.rphy == rphy))
+			goto found_device;
+	return NULL;
+found_device:
+	mpi3mr_tgtdev_get(tgtdev);
+	return tgtdev;
+}
+
 /**
  * mpi3mr_expander_find_by_sas_address - sas expander search
  * @mrioc: Adapter instance reference