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Commit a9310735 authored by Arvind Kumar's avatar Arvind Kumar Committed by James Bottomley
Browse files

[SCSI] vmw_pvscsi: Try setting host->max_id as suggested by the device. 



Fetch the config page from the device to learn max target id to set
host->max_id.

Also, fix some indentation issues and update the 'Maintained by' field.

Signed-off-by: default avatarArvind Kumar <arvindkumar@vmware.com>
Signed-off-by: default avatarJames Bottomley <JBottomley@Parallels.com>
parent 3f0bc3b3

drivers/scsi/vmw_pvscsi.c

+64 −1
Original line number Diff line number Diff line
@@ -17,7 +17,7 @@ 
 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Maintained by: Alok N Kataria <akataria@vmware.com>

 * Maintained by: Arvind Kumar <arvindkumar@vmware.com>

 *

 */
@@ -1178,11 +1178,67 @@ static int __devinit pvscsi_allocate_sg(struct pvscsi_adapter *adapter) 
	return 0;

}



/*

 * Query the device, fetch the config info and return the

 * maximum number of targets on the adapter. In case of

 * failure due to any reason return default i.e. 16.

 */

static u32 pvscsi_get_max_targets(struct pvscsi_adapter *adapter)

{

	struct PVSCSICmdDescConfigCmd cmd;

	struct PVSCSIConfigPageHeader *header;

	struct device *dev;

	dma_addr_t configPagePA;

	void *config_page;

	u32 numPhys = 16;



	dev = pvscsi_dev(adapter);

	config_page = pci_alloc_consistent(adapter->dev, PAGE_SIZE,

					   &configPagePA);

	if (!config_page) {

		dev_warn(dev, "vmw_pvscsi: failed to allocate memory for config page\n");

		goto exit;

	}

	BUG_ON(configPagePA & ~PAGE_MASK);



	/* Fetch config info from the device. */

	cmd.configPageAddress = ((u64)PVSCSI_CONFIG_CONTROLLER_ADDRESS) << 32;

	cmd.configPageNum = PVSCSI_CONFIG_PAGE_CONTROLLER;

	cmd.cmpAddr = configPagePA;

	cmd._pad = 0;



	/*

	 * Mark the completion page header with error values. If the device

	 * completes the command successfully, it sets the status values to

	 * indicate success.

	 */

	header = config_page;

	memset(header, 0, sizeof *header);

	header->hostStatus = BTSTAT_INVPARAM;

	header->scsiStatus = SDSTAT_CHECK;



	pvscsi_write_cmd_desc(adapter, PVSCSI_CMD_CONFIG, &cmd, sizeof cmd);



	if (header->hostStatus == BTSTAT_SUCCESS &&

	    header->scsiStatus == SDSTAT_GOOD) {

		struct PVSCSIConfigPageController *config;



		config = config_page;

		numPhys = config->numPhys;

	} else

		dev_warn(dev, "vmw_pvscsi: PVSCSI_CMD_CONFIG failed. hostStatus = 0x%x, scsiStatus = 0x%x\n",

			 header->hostStatus, header->scsiStatus);

	pci_free_consistent(adapter->dev, PAGE_SIZE, config_page, configPagePA);

exit:

	return numPhys;

}



static int __devinit pvscsi_probe(struct pci_dev *pdev,

				  const struct pci_device_id *id)

{

	struct pvscsi_adapter *adapter;

	struct Scsi_Host *host;

	struct device *dev;

	unsigned int i;

	unsigned long flags = 0;

	int error;
@@ -1271,6 +1327,13 @@ static int __devinit pvscsi_probe(struct pci_dev *pdev, 
		goto out_release_resources;

	}



	/*

	 * Ask the device for max number of targets.

	 */

	host->max_id = pvscsi_get_max_targets(adapter);

	dev = pvscsi_dev(adapter);

	dev_info(dev, "vmw_pvscsi: host->max_id: %u\n", host->max_id);



	/*

	 * From this point on we should reset the adapter if anything goes

	 * wrong.

drivers/scsi/vmw_pvscsi.h

+85 −24
Original line number Diff line number Diff line
@@ -17,7 +17,7 @@ 
 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Maintained by: Alok N Kataria <akataria@vmware.com>

 * Maintained by: Arvind Kumar <arvindkumar@vmware.com>

 *

 */
@@ -26,7 +26,7 @@ 


#include <linux/types.h>



#define PVSCSI_DRIVER_VERSION_STRING   "1.0.1.0-k"

#define PVSCSI_DRIVER_VERSION_STRING   "1.0.2.0-k"



#define PVSCSI_MAX_NUM_SG_ENTRIES_PER_SEGMENT 128
@@ -46,16 +46,25 @@ enum HostBusAdapterStatus { 
	BTSTAT_SELTIMEO      = 0x11,  /* SCSI selection timeout */

	BTSTAT_DATARUN       = 0x12,  /* data overrun/underrun */

	BTSTAT_BUSFREE       = 0x13,  /* unexpected bus free */

   BTSTAT_INVPHASE      = 0x14,  /* invalid bus phase or sequence requested by target */

   BTSTAT_LUNMISMATCH   = 0x17,  /* linked CCB has different LUN from first CCB */

	BTSTAT_INVPHASE      = 0x14,  /* invalid bus phase or sequence

				       * requested by target */

	BTSTAT_LUNMISMATCH   = 0x17,  /* linked CCB has different LUN from

				       * first CCB */

	BTSTAT_INVPARAM      = 0x1a,  /* invalid parameter in CCB or segment

				       * list */

	BTSTAT_SENSFAILED    = 0x1b,  /* auto request sense failed */

   BTSTAT_TAGREJECT     = 0x1c,  /* SCSI II tagged queueing message rejected by target */

   BTSTAT_BADMSG        = 0x1d,  /* unsupported message received by the host adapter */

	BTSTAT_TAGREJECT     = 0x1c,  /* SCSI II tagged queueing message

				       * rejected by target */

	BTSTAT_BADMSG        = 0x1d,  /* unsupported message received by the

				       * host adapter */

	BTSTAT_HAHARDWARE    = 0x20,  /* host adapter hardware failed */

   BTSTAT_NORESPONSE    = 0x21,  /* target did not respond to SCSI ATN, sent a SCSI RST */

	BTSTAT_NORESPONSE    = 0x21,  /* target did not respond to SCSI ATN,

				       * sent a SCSI RST */

	BTSTAT_SENTRST       = 0x22,  /* host adapter asserted a SCSI RST */

   BTSTAT_RECVRST       = 0x23,  /* other SCSI devices asserted a SCSI RST */

   BTSTAT_DISCONNECT    = 0x24,  /* target device reconnected improperly (w/o tag) */

	BTSTAT_RECVRST       = 0x23,  /* other SCSI devices asserted a SCSI

				       * RST */

	BTSTAT_DISCONNECT    = 0x24,  /* target device reconnected improperly

				       * (w/o tag) */

	BTSTAT_BUSRESET      = 0x25,  /* host adapter issued BUS device reset */

	BTSTAT_ABORTQUEUE    = 0x26,  /* abort queue generated */

	BTSTAT_HASOFTWARE    = 0x27,  /* host adapter software error */
@@ -63,6 +72,14 @@ enum HostBusAdapterStatus { 
	BTSTAT_SCSIPARITY    = 0x34,  /* SCSI parity error detected */

};



/*

 * SCSI device status values.

 */

enum ScsiDeviceStatus {

	SDSTAT_GOOD  = 0x00, /* No errors. */

	SDSTAT_CHECK = 0x02, /* Check condition. */

};



/*

 * Register offsets.

 *
@@ -113,6 +130,29 @@ struct PVSCSICmdDescResetDevice { 
	u8	lun[8];

} __packed;



/*

 * Command descriptor for PVSCSI_CMD_CONFIG --

 */



struct PVSCSICmdDescConfigCmd {

	u64 cmpAddr;

	u64 configPageAddress;

	u32 configPageNum;

	u32 _pad;

} __packed;



enum PVSCSIConfigPageType {

	PVSCSI_CONFIG_PAGE_CONTROLLER = 0x1958,

	PVSCSI_CONFIG_PAGE_PHY        = 0x1959,

	PVSCSI_CONFIG_PAGE_DEVICE     = 0x195a,

};



enum PVSCSIConfigPageAddressType {

	PVSCSI_CONFIG_CONTROLLER_ADDRESS = 0x2120,

	PVSCSI_CONFIG_BUSTARGET_ADDRESS  = 0x2121,

	PVSCSI_CONFIG_PHY_ADDRESS        = 0x2122,

};



/*

 * Command descriptor for PVSCSI_CMD_ABORT_CMD --

 *
@@ -332,6 +372,27 @@ struct PVSCSIRingCmpDesc { 
	u32	_pad[2];

} __packed;



struct PVSCSIConfigPageHeader {

	u32 pageNum;

	u16 numDwords;

	u16 hostStatus;

	u16 scsiStatus;

	u16 reserved[3];

} __packed;



struct PVSCSIConfigPageController {

	struct PVSCSIConfigPageHeader header;

	u64 nodeWWN; /* Device name as defined in the SAS spec. */

	u16 manufacturer[64];

	u16 serialNumber[64];

	u16 opromVersion[32];

	u16 hwVersion[32];

	u16 firmwareVersion[32];

	u32 numPhys;

	u8  useConsecutivePhyWWNs;

	u8  reserved[3];

} __packed;



/*

 * Interrupt status / IRQ bits.

 */