X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Fscsi%2Fsd.c;h=c0cf4acda7de9d4c6b52f8ba01b47a24ea4d03c2;hb=242f9dcb8ba6f68fcd217a119a7648a4f69290e9;hp=7aee64dbfbeb2391678d555a4fb0e4e999255080;hpb=3a2d5b700132f35401f1d9e22fe3c2cab02c2549;p=safe%2Fjmp%2Flinux-2.6 diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 7aee64d..c0cf4ac 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -58,8 +58,8 @@ #include #include #include -#include +#include "sd.h" #include "scsi_logging.h" MODULE_AUTHOR("Eric Youngdale"); @@ -86,6 +86,12 @@ MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK); MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD); MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC); +#if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) +#define SD_MINORS 16 +#else +#define SD_MINORS 0 +#endif + static int sd_revalidate_disk(struct gendisk *); static int sd_probe(struct device *); static int sd_remove(struct device *); @@ -95,12 +101,11 @@ static int sd_resume(struct device *); static void sd_rescan(struct device *); static int sd_done(struct scsi_cmnd *); static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); -static void scsi_disk_release(struct class_device *cdev); +static void scsi_disk_release(struct device *cdev); static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); static void sd_print_result(struct scsi_disk *, int); -static DEFINE_IDR(sd_index_idr); -static DEFINE_SPINLOCK(sd_index_lock); +static DEFINE_IDA(sd_index_ida); /* This semaphore is used to mediate the 0->1 reference get in the * face of object destruction (i.e. we can't allow a get on an @@ -112,11 +117,12 @@ static const char *sd_cache_types[] = { "write back, no read (daft)" }; -static ssize_t sd_store_cache_type(struct class_device *cdev, const char *buf, - size_t count) +static ssize_t +sd_store_cache_type(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) { int i, ct = -1, rcd, wce, sp; - struct scsi_disk *sdkp = to_scsi_disk(cdev); + struct scsi_disk *sdkp = to_scsi_disk(dev); struct scsi_device *sdp = sdkp->device; char buffer[64]; char *buffer_data; @@ -159,14 +165,15 @@ static ssize_t sd_store_cache_type(struct class_device *cdev, const char *buf, sd_print_sense_hdr(sdkp, &sshdr); return -EINVAL; } - sd_revalidate_disk(sdkp->disk); + revalidate_disk(sdkp->disk); return count; } -static ssize_t sd_store_manage_start_stop(struct class_device *cdev, - const char *buf, size_t count) +static ssize_t +sd_store_manage_start_stop(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) { - struct scsi_disk *sdkp = to_scsi_disk(cdev); + struct scsi_disk *sdkp = to_scsi_disk(dev); struct scsi_device *sdp = sdkp->device; if (!capable(CAP_SYS_ADMIN)) @@ -177,10 +184,11 @@ static ssize_t sd_store_manage_start_stop(struct class_device *cdev, return count; } -static ssize_t sd_store_allow_restart(struct class_device *cdev, const char *buf, - size_t count) +static ssize_t +sd_store_allow_restart(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) { - struct scsi_disk *sdkp = to_scsi_disk(cdev); + struct scsi_disk *sdkp = to_scsi_disk(dev); struct scsi_device *sdp = sdkp->device; if (!capable(CAP_SYS_ADMIN)) @@ -194,37 +202,62 @@ static ssize_t sd_store_allow_restart(struct class_device *cdev, const char *buf return count; } -static ssize_t sd_show_cache_type(struct class_device *cdev, char *buf) +static ssize_t +sd_show_cache_type(struct device *dev, struct device_attribute *attr, + char *buf) { - struct scsi_disk *sdkp = to_scsi_disk(cdev); + struct scsi_disk *sdkp = to_scsi_disk(dev); int ct = sdkp->RCD + 2*sdkp->WCE; return snprintf(buf, 40, "%s\n", sd_cache_types[ct]); } -static ssize_t sd_show_fua(struct class_device *cdev, char *buf) +static ssize_t +sd_show_fua(struct device *dev, struct device_attribute *attr, char *buf) { - struct scsi_disk *sdkp = to_scsi_disk(cdev); + struct scsi_disk *sdkp = to_scsi_disk(dev); return snprintf(buf, 20, "%u\n", sdkp->DPOFUA); } -static ssize_t sd_show_manage_start_stop(struct class_device *cdev, char *buf) +static ssize_t +sd_show_manage_start_stop(struct device *dev, struct device_attribute *attr, + char *buf) { - struct scsi_disk *sdkp = to_scsi_disk(cdev); + struct scsi_disk *sdkp = to_scsi_disk(dev); struct scsi_device *sdp = sdkp->device; return snprintf(buf, 20, "%u\n", sdp->manage_start_stop); } -static ssize_t sd_show_allow_restart(struct class_device *cdev, char *buf) +static ssize_t +sd_show_allow_restart(struct device *dev, struct device_attribute *attr, + char *buf) { - struct scsi_disk *sdkp = to_scsi_disk(cdev); + struct scsi_disk *sdkp = to_scsi_disk(dev); return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart); } -static struct class_device_attribute sd_disk_attrs[] = { +static ssize_t +sd_show_protection_type(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct scsi_disk *sdkp = to_scsi_disk(dev); + + return snprintf(buf, 20, "%u\n", sdkp->protection_type); +} + +static ssize_t +sd_show_app_tag_own(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct scsi_disk *sdkp = to_scsi_disk(dev); + + return snprintf(buf, 20, "%u\n", sdkp->ATO); +} + +static struct device_attribute sd_disk_attrs[] = { __ATTR(cache_type, S_IRUGO|S_IWUSR, sd_show_cache_type, sd_store_cache_type), __ATTR(FUA, S_IRUGO, sd_show_fua, NULL), @@ -232,14 +265,16 @@ static struct class_device_attribute sd_disk_attrs[] = { sd_store_allow_restart), __ATTR(manage_start_stop, S_IRUGO|S_IWUSR, sd_show_manage_start_stop, sd_store_manage_start_stop), + __ATTR(protection_type, S_IRUGO, sd_show_protection_type, NULL), + __ATTR(app_tag_own, S_IRUGO, sd_show_app_tag_own, NULL), __ATTR_NULL, }; static struct class sd_disk_class = { .name = "scsi_disk", .owner = THIS_MODULE, - .release = scsi_disk_release, - .class_dev_attrs = sd_disk_attrs, + .dev_release = scsi_disk_release, + .dev_attrs = sd_disk_attrs, }; static struct scsi_driver sd_template = { @@ -285,11 +320,6 @@ static int sd_major(int major_idx) } } -static inline struct scsi_disk *scsi_disk(struct gendisk *disk) -{ - return container_of(disk->private_data, struct scsi_disk, driver); -} - static struct scsi_disk *__scsi_disk_get(struct gendisk *disk) { struct scsi_disk *sdkp = NULL; @@ -297,7 +327,7 @@ static struct scsi_disk *__scsi_disk_get(struct gendisk *disk) if (disk->private_data) { sdkp = scsi_disk(disk); if (scsi_device_get(sdkp->device) == 0) - class_device_get(&sdkp->cdev); + get_device(&sdkp->dev); else sdkp = NULL; } @@ -331,7 +361,7 @@ static void scsi_disk_put(struct scsi_disk *sdkp) struct scsi_device *sdev = sdkp->device; mutex_lock(&sd_ref_mutex); - class_device_put(&sdkp->cdev); + put_device(&sdkp->dev); scsi_device_put(sdev); mutex_unlock(&sd_ref_mutex); } @@ -349,9 +379,10 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq) struct scsi_cmnd *SCpnt; struct scsi_device *sdp = q->queuedata; struct gendisk *disk = rq->rq_disk; + struct scsi_disk *sdkp; sector_t block = rq->sector; + sector_t threshold; unsigned int this_count = rq->nr_sectors; - unsigned int timeout = sdp->timeout; int ret; if (rq->cmd_type == REQ_TYPE_BLOCK_PC) { @@ -365,6 +396,7 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq) if (ret != BLKPREP_OK) goto out; SCpnt = rq->special; + sdkp = scsi_disk(disk); /* from here on until we're complete, any goto out * is used for a killable error condition */ @@ -396,13 +428,21 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq) } /* - * Some devices (some sdcards for one) don't like it if the - * last sector gets read in a larger then 1 sector read. + * Some SD card readers can't handle multi-sector accesses which touch + * the last one or two hardware sectors. Split accesses as needed. */ - if (unlikely(sdp->last_sector_bug && - rq->nr_sectors > sdp->sector_size / 512 && - block + this_count == get_capacity(disk))) - this_count -= sdp->sector_size / 512; + threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * + (sdp->sector_size / 512); + + if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { + if (block < threshold) { + /* Access up to the threshold but not beyond */ + this_count = threshold - block; + } else { + /* Access only a single hardware sector */ + this_count = sdp->sector_size / 512; + } + } SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", (unsigned long long)block)); @@ -454,6 +494,11 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq) } SCpnt->cmnd[0] = WRITE_6; SCpnt->sc_data_direction = DMA_TO_DEVICE; + + if (blk_integrity_rq(rq) && + sd_dif_prepare(rq, block, sdp->sector_size) == -EIO) + goto out; + } else if (rq_data_dir(rq) == READ) { SCpnt->cmnd[0] = READ_6; SCpnt->sc_data_direction = DMA_FROM_DEVICE; @@ -468,8 +513,12 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq) "writing" : "reading", this_count, rq->nr_sectors)); - SCpnt->cmnd[1] = 0; - + /* Set RDPROTECT/WRPROTECT if disk is formatted with DIF */ + if (scsi_host_dif_capable(sdp->host, sdkp->protection_type)) + SCpnt->cmnd[1] = 1 << 5; + else + SCpnt->cmnd[1] = 0; + if (block > 0xffffffff) { SCpnt->cmnd[0] += READ_16 - READ_6; SCpnt->cmnd[1] |= blk_fua_rq(rq) ? 0x8 : 0; @@ -487,6 +536,7 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq) SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; } else if ((this_count > 0xff) || (block > 0x1fffff) || + scsi_device_protection(SCpnt->device) || SCpnt->device->use_10_for_rw) { if (this_count > 0xffff) this_count = 0xffff; @@ -521,6 +571,10 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq) } SCpnt->sdb.length = this_count * sdp->sector_size; + /* If DIF or DIX is enabled, tell HBA how to handle request */ + if (sdkp->protection_type || scsi_prot_sg_count(SCpnt)) + sd_dif_op(SCpnt, sdkp->protection_type, scsi_prot_sg_count(SCpnt)); + /* * We shouldn't disconnect in the middle of a sector, so with a dumb * host adapter, it's safe to assume that we can at least transfer @@ -529,7 +583,6 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq) SCpnt->transfersize = sdp->sector_size; SCpnt->underflow = this_count << 9; SCpnt->allowed = SD_MAX_RETRIES; - SCpnt->timeout_per_command = timeout; /* * This indicates that the command is ready from our end to be @@ -850,7 +903,6 @@ static int sd_sync_cache(struct scsi_disk *sdkp) static void sd_prepare_flush(struct request_queue *q, struct request *rq) { - memset(rq->cmd, 0, sizeof(rq->cmd)); rq->cmd_type = REQ_TYPE_BLOCK_PC; rq->timeout = SD_TIMEOUT; rq->cmd[0] = SYNCHRONIZE_CACHE; @@ -862,7 +914,7 @@ static void sd_rescan(struct device *dev) struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); if (sdkp) { - sd_revalidate_disk(sdkp->disk); + revalidate_disk(sdkp->disk); scsi_disk_put(sdkp); } } @@ -916,6 +968,48 @@ static struct block_device_operations sd_fops = { .revalidate_disk = sd_revalidate_disk, }; +static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) +{ + u64 start_lba = scmd->request->sector; + u64 end_lba = scmd->request->sector + (scsi_bufflen(scmd) / 512); + u64 bad_lba; + int info_valid; + + if (!blk_fs_request(scmd->request)) + return 0; + + info_valid = scsi_get_sense_info_fld(scmd->sense_buffer, + SCSI_SENSE_BUFFERSIZE, + &bad_lba); + if (!info_valid) + return 0; + + if (scsi_bufflen(scmd) <= scmd->device->sector_size) + return 0; + + if (scmd->device->sector_size < 512) { + /* only legitimate sector_size here is 256 */ + start_lba <<= 1; + end_lba <<= 1; + } else { + /* be careful ... don't want any overflows */ + u64 factor = scmd->device->sector_size / 512; + do_div(start_lba, factor); + do_div(end_lba, factor); + } + + /* The bad lba was reported incorrectly, we have no idea where + * the error is. + */ + if (bad_lba < start_lba || bad_lba >= end_lba) + return 0; + + /* This computation should always be done in terms of + * the resolution of the device's medium. + */ + return (bad_lba - start_lba) * scmd->device->sector_size; +} + /** * sd_done - bottom half handler: called when the lower level * driver has completed (successfully or otherwise) a scsi command. @@ -926,15 +1020,10 @@ static struct block_device_operations sd_fops = { static int sd_done(struct scsi_cmnd *SCpnt) { int result = SCpnt->result; - unsigned int xfer_size = scsi_bufflen(SCpnt); - unsigned int good_bytes = result ? 0 : xfer_size; - u64 start_lba = SCpnt->request->sector; - u64 end_lba = SCpnt->request->sector + (xfer_size / 512); - u64 bad_lba; + unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); struct scsi_sense_hdr sshdr; int sense_valid = 0; int sense_deferred = 0; - int info_valid; if (result) { sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); @@ -959,36 +1048,7 @@ static int sd_done(struct scsi_cmnd *SCpnt) switch (sshdr.sense_key) { case HARDWARE_ERROR: case MEDIUM_ERROR: - if (!blk_fs_request(SCpnt->request)) - goto out; - info_valid = scsi_get_sense_info_fld(SCpnt->sense_buffer, - SCSI_SENSE_BUFFERSIZE, - &bad_lba); - if (!info_valid) - goto out; - if (xfer_size <= SCpnt->device->sector_size) - goto out; - if (SCpnt->device->sector_size < 512) { - /* only legitimate sector_size here is 256 */ - start_lba <<= 1; - end_lba <<= 1; - } else { - /* be careful ... don't want any overflows */ - u64 factor = SCpnt->device->sector_size / 512; - do_div(start_lba, factor); - do_div(end_lba, factor); - } - - if (bad_lba < start_lba || bad_lba >= end_lba) - /* the bad lba was reported incorrectly, we have - * no idea where the error is - */ - goto out; - - /* This computation should always be done in terms of - * the resolution of the device's medium. - */ - good_bytes = (bad_lba - start_lba)*SCpnt->device->sector_size; + good_bytes = sd_completed_bytes(SCpnt); break; case RECOVERED_ERROR: case NO_SENSE: @@ -998,10 +1058,23 @@ static int sd_done(struct scsi_cmnd *SCpnt) scsi_print_sense("sd", SCpnt); SCpnt->result = 0; memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); - good_bytes = xfer_size; + good_bytes = scsi_bufflen(SCpnt); + break; + case ABORTED_COMMAND: + if (sshdr.asc == 0x10) { /* DIF: Disk detected corruption */ + scsi_print_result(SCpnt); + scsi_print_sense("sd", SCpnt); + good_bytes = sd_completed_bytes(SCpnt); + } break; case ILLEGAL_REQUEST: - if (SCpnt->device->use_10_for_rw && + if (sshdr.asc == 0x10) { /* DIX: HBA detected corruption */ + scsi_print_result(SCpnt); + scsi_print_sense("sd", SCpnt); + good_bytes = sd_completed_bytes(SCpnt); + } + if (!scsi_device_protection(SCpnt->device) && + SCpnt->device->use_10_for_rw && (SCpnt->cmnd[0] == READ_10 || SCpnt->cmnd[0] == WRITE_10)) SCpnt->device->use_10_for_rw = 0; @@ -1014,6 +1087,9 @@ static int sd_done(struct scsi_cmnd *SCpnt) break; } out: + if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt)) + sd_dif_complete(SCpnt, good_bytes); + return good_bytes; } @@ -1115,6 +1191,8 @@ sd_spinup_disk(struct scsi_disk *sdkp) cmd[1] = 1; /* Return immediately */ memset((void *) &cmd[2], 0, 8); cmd[4] = 1; /* Start spin cycle */ + if (sdkp->device->start_stop_pwr_cond) + cmd[4] |= 1 << 4; scsi_execute_req(sdkp->device, cmd, DMA_NONE, NULL, 0, &sshdr, SD_TIMEOUT, SD_MAX_RETRIES); @@ -1159,6 +1237,49 @@ sd_spinup_disk(struct scsi_disk *sdkp) } } + +/* + * Determine whether disk supports Data Integrity Field. + */ +void sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) +{ + struct scsi_device *sdp = sdkp->device; + u8 type; + + if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) + type = 0; + else + type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ + + switch (type) { + case SD_DIF_TYPE0_PROTECTION: + sdkp->protection_type = 0; + break; + + case SD_DIF_TYPE1_PROTECTION: + case SD_DIF_TYPE3_PROTECTION: + sdkp->protection_type = type; + break; + + case SD_DIF_TYPE2_PROTECTION: + sd_printk(KERN_ERR, sdkp, "formatted with DIF Type 2 " \ + "protection which is currently unsupported. " \ + "Disabling disk!\n"); + goto disable; + + default: + sd_printk(KERN_ERR, sdkp, "formatted with unknown " \ + "protection type %d. Disabling disk!\n", type); + goto disable; + } + + return; + +disable: + sdkp->protection_type = 0; + sdkp->capacity = 0; +} + /* * read disk capacity */ @@ -1168,7 +1289,8 @@ sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) unsigned char cmd[16]; int the_result, retries; int sector_size = 0; - int longrc = 0; + /* Force READ CAPACITY(16) when PROTECT=1 */ + int longrc = scsi_device_protection(sdkp->device) ? 1 : 0; struct scsi_sense_hdr sshdr; int sense_valid = 0; struct scsi_device *sdp = sdkp->device; @@ -1180,8 +1302,8 @@ repeat: memset((void *) cmd, 0, 16); cmd[0] = SERVICE_ACTION_IN; cmd[1] = SAI_READ_CAPACITY_16; - cmd[13] = 12; - memset((void *) buffer, 0, 12); + cmd[13] = 13; + memset((void *) buffer, 0, 13); } else { cmd[0] = READ_CAPACITY; memset((void *) &cmd[1], 0, 9); @@ -1189,7 +1311,7 @@ repeat: } the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, - buffer, longrc ? 12 : 8, &sshdr, + buffer, longrc ? 13 : 8, &sshdr, SD_TIMEOUT, SD_MAX_RETRIES); if (media_not_present(sdkp, &sshdr)) @@ -1264,6 +1386,8 @@ repeat: sector_size = (buffer[8] << 24) | (buffer[9] << 16) | (buffer[10] << 8) | buffer[11]; + + sd_read_protection_type(sdkp, buffer); } /* Some devices return the total number of sectors, not the @@ -1525,6 +1649,52 @@ defaults: sdkp->DPOFUA = 0; } +/* + * The ATO bit indicates whether the DIF application tag is available + * for use by the operating system. + */ +void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) +{ + int res, offset; + struct scsi_device *sdp = sdkp->device; + struct scsi_mode_data data; + struct scsi_sense_hdr sshdr; + + if (sdp->type != TYPE_DISK) + return; + + if (sdkp->protection_type == 0) + return; + + res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, + SD_MAX_RETRIES, &data, &sshdr); + + if (!scsi_status_is_good(res) || !data.header_length || + data.length < 6) { + sd_printk(KERN_WARNING, sdkp, + "getting Control mode page failed, assume no ATO\n"); + + if (scsi_sense_valid(&sshdr)) + sd_print_sense_hdr(sdkp, &sshdr); + + return; + } + + offset = data.header_length + data.block_descriptor_length; + + if ((buffer[offset] & 0x3f) != 0x0a) { + sd_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); + return; + } + + if ((buffer[offset + 5] & 0x80) == 0) + return; + + sdkp->ATO = 1; + + return; +} + /** * sd_revalidate_disk - called the first time a new disk is seen, * performs disk spin up, read_capacity, etc. @@ -1561,6 +1731,7 @@ static int sd_revalidate_disk(struct gendisk *disk) sdkp->write_prot = 0; sdkp->WCE = 0; sdkp->RCD = 0; + sdkp->ATO = 0; sd_spinup_disk(sdkp); @@ -1572,6 +1743,7 @@ static int sd_revalidate_disk(struct gendisk *disk) sd_read_capacity(sdkp, buffer); sd_read_write_protect_flag(sdkp, buffer); sd_read_cache_type(sdkp, buffer); + sd_read_app_tag_own(sdkp, buffer); } /* @@ -1596,6 +1768,52 @@ static int sd_revalidate_disk(struct gendisk *disk) } /** + * sd_format_disk_name - format disk name + * @prefix: name prefix - ie. "sd" for SCSI disks + * @index: index of the disk to format name for + * @buf: output buffer + * @buflen: length of the output buffer + * + * SCSI disk names starts at sda. The 26th device is sdz and the + * 27th is sdaa. The last one for two lettered suffix is sdzz + * which is followed by sdaaa. + * + * This is basically 26 base counting with one extra 'nil' entry + * at the beggining from the second digit on and can be + * determined using similar method as 26 base conversion with the + * index shifted -1 after each digit is computed. + * + * CONTEXT: + * Don't care. + * + * RETURNS: + * 0 on success, -errno on failure. + */ +static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) +{ + const int base = 'z' - 'a' + 1; + char *begin = buf + strlen(prefix); + char *end = buf + buflen; + char *p; + int unit; + + p = end - 1; + *p = '\0'; + unit = base; + do { + if (p == begin) + return -EINVAL; + *--p = 'a' + (index % unit); + index = (index / unit) - 1; + } while (index >= 0); + + memmove(begin, p, end - p); + memcpy(buf, prefix, strlen(prefix)); + + return 0; +} + +/** * sd_probe - called during driver initialization and whenever a * new scsi device is attached to the system. It is called once * for each scsi device (not just disks) present. @@ -1633,63 +1851,55 @@ static int sd_probe(struct device *dev) if (!sdkp) goto out; - gd = alloc_disk(16); + gd = alloc_disk(SD_MINORS); if (!gd) goto out_free; - if (!idr_pre_get(&sd_index_idr, GFP_KERNEL)) - goto out_put; + do { + if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) + goto out_put; - spin_lock(&sd_index_lock); - error = idr_get_new(&sd_index_idr, NULL, &index); - spin_unlock(&sd_index_lock); + error = ida_get_new(&sd_index_ida, &index); + } while (error == -EAGAIN); - if (index >= SD_MAX_DISKS) - error = -EBUSY; if (error) goto out_put; + error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); + if (error) + goto out_free_index; + sdkp->device = sdp; sdkp->driver = &sd_template; sdkp->disk = gd; sdkp->index = index; sdkp->openers = 0; + sdkp->previous_state = 1; - if (!sdp->timeout) { + if (!sdp->request_queue->rq_timeout) { if (sdp->type != TYPE_MOD) - sdp->timeout = SD_TIMEOUT; + blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); else - sdp->timeout = SD_MOD_TIMEOUT; + blk_queue_rq_timeout(sdp->request_queue, + SD_MOD_TIMEOUT); } - class_device_initialize(&sdkp->cdev); - sdkp->cdev.dev = &sdp->sdev_gendev; - sdkp->cdev.class = &sd_disk_class; - strncpy(sdkp->cdev.class_id, sdp->sdev_gendev.bus_id, BUS_ID_SIZE); + device_initialize(&sdkp->dev); + sdkp->dev.parent = &sdp->sdev_gendev; + sdkp->dev.class = &sd_disk_class; + strncpy(sdkp->dev.bus_id, sdp->sdev_gendev.bus_id, BUS_ID_SIZE); - if (class_device_add(&sdkp->cdev)) - goto out_put; + if (device_add(&sdkp->dev)) + goto out_free_index; get_device(&sdp->sdev_gendev); - gd->major = sd_major((index & 0xf0) >> 4); - gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); - gd->minors = 16; - gd->fops = &sd_fops; - - if (index < 26) { - sprintf(gd->disk_name, "sd%c", 'a' + index % 26); - } else if (index < (26 + 1) * 26) { - sprintf(gd->disk_name, "sd%c%c", - 'a' + index / 26 - 1,'a' + index % 26); - } else { - const unsigned int m1 = (index / 26 - 1) / 26 - 1; - const unsigned int m2 = (index / 26 - 1) % 26; - const unsigned int m3 = index % 26; - sprintf(gd->disk_name, "sd%c%c%c", - 'a' + m1, 'a' + m2, 'a' + m3); + if (index < SD_MAX_DISKS) { + gd->major = sd_major((index & 0xf0) >> 4); + gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); + gd->minors = SD_MINORS; } - + gd->fops = &sd_fops; gd->private_data = &sdkp->driver; gd->queue = sdkp->device->request_queue; @@ -1698,18 +1908,21 @@ static int sd_probe(struct device *dev) blk_queue_prep_rq(sdp->request_queue, sd_prep_fn); gd->driverfs_dev = &sdp->sdev_gendev; - gd->flags = GENHD_FL_DRIVERFS; + gd->flags = GENHD_FL_EXT_DEVT | GENHD_FL_DRIVERFS; if (sdp->removable) gd->flags |= GENHD_FL_REMOVABLE; dev_set_drvdata(dev, sdkp); add_disk(gd); + sd_dif_config_host(sdkp); sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", sdp->removable ? "removable " : ""); return 0; + out_free_index: + ida_remove(&sd_index_ida, index); out_put: put_disk(gd); out_free: @@ -1733,13 +1946,13 @@ static int sd_remove(struct device *dev) { struct scsi_disk *sdkp = dev_get_drvdata(dev); - class_device_del(&sdkp->cdev); + device_del(&sdkp->dev); del_gendisk(sdkp->disk); sd_shutdown(dev); mutex_lock(&sd_ref_mutex); dev_set_drvdata(dev, NULL); - class_device_put(&sdkp->cdev); + put_device(&sdkp->dev); mutex_unlock(&sd_ref_mutex); return 0; @@ -1747,21 +1960,19 @@ static int sd_remove(struct device *dev) /** * scsi_disk_release - Called to free the scsi_disk structure - * @cdev: pointer to embedded class device + * @dev: pointer to embedded class device * * sd_ref_mutex must be held entering this routine. Because it is * called on last put, you should always use the scsi_disk_get() * scsi_disk_put() helpers which manipulate the semaphore directly - * and never do a direct class_device_put(). + * and never do a direct put_device. **/ -static void scsi_disk_release(struct class_device *cdev) +static void scsi_disk_release(struct device *dev) { - struct scsi_disk *sdkp = to_scsi_disk(cdev); + struct scsi_disk *sdkp = to_scsi_disk(dev); struct gendisk *disk = sdkp->disk; - spin_lock(&sd_index_lock); - idr_remove(&sd_index_idr, sdkp->index); - spin_unlock(&sd_index_lock); + ida_remove(&sd_index_ida, sdkp->index); disk->private_data = NULL; put_disk(disk); @@ -1780,6 +1991,9 @@ static int sd_start_stop_device(struct scsi_disk *sdkp, int start) if (start) cmd[4] |= 1; /* START */ + if (sdp->start_stop_pwr_cond) + cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ + if (!scsi_device_online(sdp)) return -ENODEV;