diff options
Diffstat (limited to 'drivers/usb/storage/scsiglue.c')
| -rw-r--r-- | drivers/usb/storage/scsiglue.c | 156 |
1 files changed, 89 insertions, 67 deletions
diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c index a688b1e686e..866b5df36ed 100644 --- a/drivers/usb/storage/scsiglue.c +++ b/drivers/usb/storage/scsiglue.c @@ -104,17 +104,9 @@ static int slave_alloc (struct scsi_device *sdev) */ blk_queue_update_dma_alignment(sdev->request_queue, (512 - 1)); - /* - * The UFI spec treates the Peripheral Qualifier bits in an - * INQUIRY result as reserved and requires devices to set them - * to 0. However the SCSI spec requires these bits to be set - * to 3 to indicate when a LUN is not present. - * - * Let the scanning code know if this target merely sets - * Peripheral Device Type to 0x1f to indicate no LUN. - */ - if (us->subclass == USB_SC_UFI) - sdev->sdev_target->pdt_1f_for_no_lun = 1; + /* Tell the SCSI layer if we know there is more than one LUN */ + if (us->protocol == USB_PR_BULK && us->max_lun > 0) + sdev->sdev_bflags |= BLIST_FORCELUN; return 0; } @@ -123,7 +115,7 @@ static int slave_configure(struct scsi_device *sdev) { struct us_data *us = host_to_us(sdev->host); - /* Many devices have trouble transfering more than 32KB at a time, + /* Many devices have trouble transferring more than 32KB at a time, * while others have trouble with more than 64K. At this time we * are limiting both to 32K (64 sectores). */ @@ -197,6 +189,15 @@ static int slave_configure(struct scsi_device *sdev) * page x08, so we will skip it. */ sdev->skip_ms_page_8 = 1; + /* Some devices don't handle VPD pages correctly */ + sdev->skip_vpd_pages = 1; + + /* Do not attempt to use REPORT SUPPORTED OPERATION CODES */ + sdev->no_report_opcodes = 1; + + /* Do not attempt to use WRITE SAME */ + sdev->no_write_same = 1; + /* Some disks return the total number of blocks in response * to READ CAPACITY rather than the highest block number. * If this device makes that mistake, tell the sd driver. */ @@ -213,20 +214,19 @@ static int slave_configure(struct scsi_device *sdev) if (us->fflags & US_FL_NO_READ_CAPACITY_16) sdev->no_read_capacity_16 = 1; + /* + * Many devices do not respond properly to READ_CAPACITY_16. + * Tell the SCSI layer to try READ_CAPACITY_10 first. + * However some USB 3.0 drive enclosures return capacity + * modulo 2TB. Those must use READ_CAPACITY_16 + */ + if (!(us->fflags & US_FL_NEEDS_CAP16)) + sdev->try_rc_10_first = 1; + /* assume SPC3 or latter devices support sense size > 18 */ if (sdev->scsi_level > SCSI_SPC_2) us->fflags |= US_FL_SANE_SENSE; - /* Some devices report a SCSI revision level above 2 but are - * unable to handle the REPORT LUNS command (for which - * support is mandatory at level 3). Since we already have - * a Get-Max-LUN request, we won't lose much by setting the - * revision level down to 2. The only devices that would be - * affected are those with sparse LUNs. */ - if (sdev->scsi_level > SCSI_2) - sdev->sdev_target->scsi_level = - sdev->scsi_level = SCSI_2; - /* USB-IDE bridges tend to report SK = 0x04 (Non-recoverable * Hardware Error) when any low-level error occurs, * recoverable or not. Setting this flag tells the SCSI @@ -251,6 +251,15 @@ static int slave_configure(struct scsi_device *sdev) US_FL_SCM_MULT_TARG)) && us->protocol == USB_PR_BULK) us->use_last_sector_hacks = 1; + + /* Check if write cache default on flag is set or not */ + if (us->fflags & US_FL_WRITE_CACHE) + sdev->wce_default_on = 1; + + /* A few buggy USB-ATA bridges don't understand FUA */ + if (us->fflags & US_FL_BROKEN_FUA) + sdev->broken_fua = 1; + } else { /* Non-disk-type devices don't need to blacklist any pages @@ -283,15 +292,40 @@ static int slave_configure(struct scsi_device *sdev) return 0; } +static int target_alloc(struct scsi_target *starget) +{ + struct us_data *us = host_to_us(dev_to_shost(starget->dev.parent)); + + /* + * Some USB drives don't support REPORT LUNS, even though they + * report a SCSI revision level above 2. Tell the SCSI layer + * not to issue that command; it will perform a normal sequential + * scan instead. + */ + starget->no_report_luns = 1; + + /* + * The UFI spec treats the Peripheral Qualifier bits in an + * INQUIRY result as reserved and requires devices to set them + * to 0. However the SCSI spec requires these bits to be set + * to 3 to indicate when a LUN is not present. + * + * Let the scanning code know if this target merely sets + * Peripheral Device Type to 0x1f to indicate no LUN. + */ + if (us->subclass == USB_SC_UFI) + starget->pdt_1f_for_no_lun = 1; + + return 0; +} + /* queue a command */ /* This is always called with scsi_lock(host) held */ -static int queuecommand(struct scsi_cmnd *srb, +static int queuecommand_lck(struct scsi_cmnd *srb, void (*done)(struct scsi_cmnd *)) { struct us_data *us = host_to_us(srb->device->host); - US_DEBUGP("%s called\n", __func__); - /* check for state-transition errors */ if (us->srb != NULL) { printk(KERN_ERR USB_STORAGE "Error in %s: us->srb = %p\n", @@ -301,7 +335,7 @@ static int queuecommand(struct scsi_cmnd *srb, /* fail the command if we are disconnecting */ if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) { - US_DEBUGP("Fail command during disconnect\n"); + usb_stor_dbg(us, "Fail command during disconnect\n"); srb->result = DID_NO_CONNECT << 16; done(srb); return 0; @@ -315,6 +349,8 @@ static int queuecommand(struct scsi_cmnd *srb, return 0; } +static DEF_SCSI_QCMD(queuecommand) + /*********************************************************************** * Error handling functions ***********************************************************************/ @@ -324,7 +360,7 @@ static int command_abort(struct scsi_cmnd *srb) { struct us_data *us = host_to_us(srb->device->host); - US_DEBUGP("%s called\n", __func__); + usb_stor_dbg(us, "%s called\n", __func__); /* us->srb together with the TIMED_OUT, RESETTING, and ABORTING * bits are protected by the host lock. */ @@ -333,7 +369,7 @@ static int command_abort(struct scsi_cmnd *srb) /* Is this command still active? */ if (us->srb != srb) { scsi_unlock(us_to_host(us)); - US_DEBUGP ("-- nothing to abort\n"); + usb_stor_dbg(us, "-- nothing to abort\n"); return FAILED; } @@ -361,7 +397,7 @@ static int device_reset(struct scsi_cmnd *srb) struct us_data *us = host_to_us(srb->device->host); int result; - US_DEBUGP("%s called\n", __func__); + usb_stor_dbg(us, "%s called\n", __func__); /* lock the device pointers and do the reset */ mutex_lock(&(us->dev_mutex)); @@ -377,7 +413,8 @@ static int bus_reset(struct scsi_cmnd *srb) struct us_data *us = host_to_us(srb->device->host); int result; - US_DEBUGP("%s called\n", __func__); + usb_stor_dbg(us, "%s called\n", __func__); + result = usb_stor_port_reset(us); return result < 0 ? FAILED : SUCCESS; } @@ -413,22 +450,21 @@ void usb_stor_report_bus_reset(struct us_data *us) * /proc/scsi/ functions ***********************************************************************/ +static int write_info(struct Scsi_Host *host, char *buffer, int length) +{ + /* if someone is sending us data, just throw it away */ + return length; +} + /* we use this macro to help us write into the buffer */ #undef SPRINTF -#define SPRINTF(args...) \ - do { if (pos < buffer+length) pos += sprintf(pos, ## args); } while (0) +#define SPRINTF(args...) seq_printf(m, ## args) -static int proc_info (struct Scsi_Host *host, char *buffer, - char **start, off_t offset, int length, int inout) +static int show_info (struct seq_file *m, struct Scsi_Host *host) { struct us_data *us = host_to_us(host); - char *pos = buffer; const char *string; - /* if someone is sending us data, just throw it away */ - if (inout) - return length; - /* print the controller name */ SPRINTF(" Host scsi%d: usb-storage\n", host->host_no); @@ -458,28 +494,14 @@ static int proc_info (struct Scsi_Host *host, char *buffer, SPRINTF(" Transport: %s\n", us->transport_name); /* show the device flags */ - if (pos < buffer + length) { - pos += sprintf(pos, " Quirks:"); + SPRINTF(" Quirks:"); #define US_FLAG(name, value) \ - if (us->fflags & value) pos += sprintf(pos, " " #name); + if (us->fflags & value) seq_printf(m, " " #name); US_DO_ALL_FLAGS #undef US_FLAG - - *(pos++) = '\n'; - } - - /* - * Calculate start of next buffer, and return value. - */ - *start = buffer + offset; - - if ((pos - buffer) < offset) - return (0); - else if ((pos - buffer - offset) < length) - return (pos - buffer - offset); - else - return (length); + seq_putc(m, '\n'); + return 0; } /*********************************************************************** @@ -487,7 +509,7 @@ US_DO_ALL_FLAGS ***********************************************************************/ /* Output routine for the sysfs max_sectors file */ -static ssize_t show_max_sectors(struct device *dev, struct device_attribute *attr, char *buf) +static ssize_t max_sectors_show(struct device *dev, struct device_attribute *attr, char *buf) { struct scsi_device *sdev = to_scsi_device(dev); @@ -495,7 +517,7 @@ static ssize_t show_max_sectors(struct device *dev, struct device_attribute *att } /* Input routine for the sysfs max_sectors file */ -static ssize_t store_max_sectors(struct device *dev, struct device_attribute *attr, const char *buf, +static ssize_t max_sectors_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct scsi_device *sdev = to_scsi_device(dev); @@ -505,16 +527,14 @@ static ssize_t store_max_sectors(struct device *dev, struct device_attribute *at blk_queue_max_hw_sectors(sdev->request_queue, ms); return count; } - return -EINVAL; + return -EINVAL; } - -static DEVICE_ATTR(max_sectors, S_IRUGO | S_IWUSR, show_max_sectors, - store_max_sectors); +static DEVICE_ATTR_RW(max_sectors); static struct device_attribute *sysfs_device_attr_list[] = { - &dev_attr_max_sectors, - NULL, - }; + &dev_attr_max_sectors, + NULL, +}; /* * this defines our host template, with which we'll allocate hosts @@ -524,7 +544,8 @@ struct scsi_host_template usb_stor_host_template = { /* basic userland interface stuff */ .name = "usb-storage", .proc_name = "usb-storage", - .proc_info = proc_info, + .show_info = show_info, + .write_info = write_info, .info = host_info, /* command interface -- queued only */ @@ -544,6 +565,7 @@ struct scsi_host_template usb_stor_host_template = { .slave_alloc = slave_alloc, .slave_configure = slave_configure, + .target_alloc = target_alloc, /* lots of sg segments can be handled */ .sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS, |