[PATCH 06/25] mpi3mr: Add support for PCIe Managed Switch SES device

[Sreekanth Reddy <sreekanth.reddy@xxxxxxxxxxxx>]

The SAS4 Controller firmware exposes the SES devices
in Managed PCIe Switch as a PCIe Device Type SCSI Device
(MPI3_DEVICE0_PCIE_DEVICE_INFO_TYPE_SCSI_DEVICE).

Driver is enhanced to handle this device type by
 - exposing the device to the upper layers and
 - not updating any hardware sectors & virtual boundary
settings as these settings are needed only for
NVMe devices.

Signed-off-by: Sreekanth Reddy <sreekanth.reddy@xxxxxxxxxxxx>
---
 drivers/scsi/mpi3mr/mpi3mr.h    |  3 +++
 drivers/scsi/mpi3mr/mpi3mr_os.c | 40 ++++++++++++++++++++++++---------
 2 files changed, 32 insertions(+), 11 deletions(-)

diff --git a/drivers/scsi/mpi3mr/mpi3mr.h b/drivers/scsi/mpi3mr/mpi3mr.h
index cdbd1cb..fe3cfd5 100644
--- a/drivers/scsi/mpi3mr/mpi3mr.h
+++ b/drivers/scsi/mpi3mr/mpi3mr.h
@@ -147,6 +147,7 @@ extern int prot_mask;
 			MPI3_SCSITASKMGMT_RSPCODE_IO_QUEUED_ON_IOC
 
 #define MPI3MR_DEFAULT_MDTS	(128 * 1024)
+#define MPI3MR_DEFAULT_PGSZEXP         (12)
 /* Command retry count definitions */
 #define MPI3MR_DEV_RMHS_RETRY_COUNT 3
 
@@ -389,6 +390,7 @@ struct tgt_dev_sas_sata {
  * @pgsz: Device page size
  * @abort_to: Timeout for abort TM
  * @reset_to: Timeout for Target/LUN reset TM
+ * @dev_info: Device information bits
  */
 struct tgt_dev_pcie {
 	u32 mdts;
@@ -396,6 +398,7 @@ struct tgt_dev_pcie {
 	u8 pgsz;
 	u8 abort_to;
 	u8 reset_to;
+	u16 dev_info;
 };
 
 /**
diff --git a/drivers/scsi/mpi3mr/mpi3mr_os.c b/drivers/scsi/mpi3mr/mpi3mr_os.c
index e887d31..14621dc 100644
--- a/drivers/scsi/mpi3mr/mpi3mr_os.c
+++ b/drivers/scsi/mpi3mr/mpi3mr_os.c
@@ -742,11 +742,18 @@ mpi3mr_update_sdev(struct scsi_device *sdev, void *data)
 	switch (tgtdev->dev_type) {
 	case MPI3_DEVICE_DEVFORM_PCIE:
 		/*The block layer hw sector size = 512*/
-		blk_queue_max_hw_sectors(sdev->request_queue,
-		    tgtdev->dev_spec.pcie_inf.mdts / 512);
-		blk_queue_virt_boundary(sdev->request_queue,
-		    ((1 << tgtdev->dev_spec.pcie_inf.pgsz) - 1));
-
+		if ((tgtdev->dev_spec.pcie_inf.dev_info &
+		    MPI3_DEVICE0_PCIE_DEVICE_INFO_TYPE_MASK) ==
+		    MPI3_DEVICE0_PCIE_DEVICE_INFO_TYPE_NVME_DEVICE) {
+			blk_queue_max_hw_sectors(sdev->request_queue,
+			    tgtdev->dev_spec.pcie_inf.mdts / 512);
+			if (tgtdev->dev_spec.pcie_inf.pgsz == 0)
+				blk_queue_virt_boundary(sdev->request_queue,
+				    ((1 << MPI3MR_DEFAULT_PGSZEXP) - 1));
+			else
+				blk_queue_virt_boundary(sdev->request_queue,
+				    ((1 << tgtdev->dev_spec.pcie_inf.pgsz) - 1));
+		}
 		break;
 	default:
 		break;
@@ -848,6 +855,7 @@ static void mpi3mr_update_tgtdev(struct mpi3mr_ioc *mrioc,
 		    &dev_pg0->device_specific.pcie_format;
 		u16 dev_info = le16_to_cpu(pcieinf->device_info);
 
+		tgtdev->dev_spec.pcie_inf.dev_info = dev_info;
 		tgtdev->dev_spec.pcie_inf.capb =
 		    le32_to_cpu(pcieinf->capabilities);
 		tgtdev->dev_spec.pcie_inf.mdts = MPI3MR_DEFAULT_MDTS;
@@ -864,8 +872,10 @@ static void mpi3mr_update_tgtdev(struct mpi3mr_ioc *mrioc,
 		}
 		if (tgtdev->dev_spec.pcie_inf.mdts > (1024 * 1024))
 			tgtdev->dev_spec.pcie_inf.mdts = (1024 * 1024);
-		if ((dev_info & MPI3_DEVICE0_PCIE_DEVICE_INFO_TYPE_MASK) !=
-		    MPI3_DEVICE0_PCIE_DEVICE_INFO_TYPE_NVME_DEVICE)
+		if (((dev_info & MPI3_DEVICE0_PCIE_DEVICE_INFO_TYPE_MASK) !=
+		    MPI3_DEVICE0_PCIE_DEVICE_INFO_TYPE_NVME_DEVICE) &&
+		    ((dev_info & MPI3_DEVICE0_PCIE_DEVICE_INFO_TYPE_MASK) !=
+		    MPI3_DEVICE0_PCIE_DEVICE_INFO_TYPE_SCSI_DEVICE))
 			tgtdev->is_hidden = 1;
 		if (!mrioc->shost)
 			break;
@@ -3190,10 +3200,18 @@ static int mpi3mr_slave_configure(struct scsi_device *sdev)
 	switch (tgt_dev->dev_type) {
 	case MPI3_DEVICE_DEVFORM_PCIE:
 		/*The block layer hw sector size = 512*/
-		blk_queue_max_hw_sectors(sdev->request_queue,
-		    tgt_dev->dev_spec.pcie_inf.mdts / 512);
-		blk_queue_virt_boundary(sdev->request_queue,
-		    ((1 << tgt_dev->dev_spec.pcie_inf.pgsz) - 1));
+		if ((tgt_dev->dev_spec.pcie_inf.dev_info &
+		    MPI3_DEVICE0_PCIE_DEVICE_INFO_TYPE_MASK) ==
+		    MPI3_DEVICE0_PCIE_DEVICE_INFO_TYPE_NVME_DEVICE) {
+			blk_queue_max_hw_sectors(sdev->request_queue,
+			    tgt_dev->dev_spec.pcie_inf.mdts / 512);
+			if (tgt_dev->dev_spec.pcie_inf.pgsz == 0)
+				blk_queue_virt_boundary(sdev->request_queue,
+				    ((1 << MPI3MR_DEFAULT_PGSZEXP) - 1));
+			else
+				blk_queue_virt_boundary(sdev->request_queue,
+				    ((1 << tgt_dev->dev_spec.pcie_inf.pgsz) - 1));
+		}
 		break;
 	default:
 		break;
-- 
2.27.0

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