| /* |
| * linux/drivers/ide/ide-disk.c Version 1.18 Mar 05, 2003 |
| * |
| * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) |
| * Copyright (C) 1998-2002 Linux ATA Development |
| * Andre Hedrick <andre@linux-ide.org> |
| * Copyright (C) 2003 Red Hat <alan@redhat.com> |
| */ |
| |
| /* |
| * Mostly written by Mark Lord <mlord@pobox.com> |
| * and Gadi Oxman <gadio@netvision.net.il> |
| * and Andre Hedrick <andre@linux-ide.org> |
| * |
| * This is the IDE/ATA disk driver, as evolved from hd.c and ide.c. |
| */ |
| |
| #define IDEDISK_VERSION "1.18" |
| |
| //#define DEBUG |
| |
| #include <linux/module.h> |
| #include <linux/types.h> |
| #include <linux/string.h> |
| #include <linux/kernel.h> |
| #include <linux/timer.h> |
| #include <linux/mm.h> |
| #include <linux/interrupt.h> |
| #include <linux/major.h> |
| #include <linux/errno.h> |
| #include <linux/genhd.h> |
| #include <linux/slab.h> |
| #include <linux/delay.h> |
| #include <linux/mutex.h> |
| #include <linux/leds.h> |
| |
| #define _IDE_DISK |
| |
| #include <linux/ide.h> |
| |
| #include <asm/byteorder.h> |
| #include <asm/irq.h> |
| #include <asm/uaccess.h> |
| #include <asm/io.h> |
| #include <asm/div64.h> |
| |
| struct ide_disk_obj { |
| ide_drive_t *drive; |
| ide_driver_t *driver; |
| struct gendisk *disk; |
| struct kref kref; |
| unsigned int openers; /* protected by BKL for now */ |
| }; |
| |
| static DEFINE_MUTEX(idedisk_ref_mutex); |
| |
| #define to_ide_disk(obj) container_of(obj, struct ide_disk_obj, kref) |
| |
| #define ide_disk_g(disk) \ |
| container_of((disk)->private_data, struct ide_disk_obj, driver) |
| |
| static struct ide_disk_obj *ide_disk_get(struct gendisk *disk) |
| { |
| struct ide_disk_obj *idkp = NULL; |
| |
| mutex_lock(&idedisk_ref_mutex); |
| idkp = ide_disk_g(disk); |
| if (idkp) |
| kref_get(&idkp->kref); |
| mutex_unlock(&idedisk_ref_mutex); |
| return idkp; |
| } |
| |
| static void ide_disk_release(struct kref *); |
| |
| static void ide_disk_put(struct ide_disk_obj *idkp) |
| { |
| mutex_lock(&idedisk_ref_mutex); |
| kref_put(&idkp->kref, ide_disk_release); |
| mutex_unlock(&idedisk_ref_mutex); |
| } |
| |
| /* |
| * lba_capacity_is_ok() performs a sanity check on the claimed "lba_capacity" |
| * value for this drive (from its reported identification information). |
| * |
| * Returns: 1 if lba_capacity looks sensible |
| * 0 otherwise |
| * |
| * It is called only once for each drive. |
| */ |
| static int lba_capacity_is_ok (struct hd_driveid *id) |
| { |
| unsigned long lba_sects, chs_sects, head, tail; |
| |
| /* No non-LBA info .. so valid! */ |
| if (id->cyls == 0) |
| return 1; |
| |
| /* |
| * The ATA spec tells large drives to return |
| * C/H/S = 16383/16/63 independent of their size. |
| * Some drives can be jumpered to use 15 heads instead of 16. |
| * Some drives can be jumpered to use 4092 cyls instead of 16383. |
| */ |
| if ((id->cyls == 16383 |
| || (id->cyls == 4092 && id->cur_cyls == 16383)) && |
| id->sectors == 63 && |
| (id->heads == 15 || id->heads == 16) && |
| (id->lba_capacity >= 16383*63*id->heads)) |
| return 1; |
| |
| lba_sects = id->lba_capacity; |
| chs_sects = id->cyls * id->heads * id->sectors; |
| |
| /* perform a rough sanity check on lba_sects: within 10% is OK */ |
| if ((lba_sects - chs_sects) < chs_sects/10) |
| return 1; |
| |
| /* some drives have the word order reversed */ |
| head = ((lba_sects >> 16) & 0xffff); |
| tail = (lba_sects & 0xffff); |
| lba_sects = (head | (tail << 16)); |
| if ((lba_sects - chs_sects) < chs_sects/10) { |
| id->lba_capacity = lba_sects; |
| return 1; /* lba_capacity is (now) good */ |
| } |
| |
| return 0; /* lba_capacity value may be bad */ |
| } |
| |
| static const u8 ide_rw_cmds[] = { |
| WIN_MULTREAD, |
| WIN_MULTWRITE, |
| WIN_MULTREAD_EXT, |
| WIN_MULTWRITE_EXT, |
| WIN_READ, |
| WIN_WRITE, |
| WIN_READ_EXT, |
| WIN_WRITE_EXT, |
| WIN_READDMA, |
| WIN_WRITEDMA, |
| WIN_READDMA_EXT, |
| WIN_WRITEDMA_EXT, |
| }; |
| |
| static const u8 ide_data_phases[] = { |
| TASKFILE_MULTI_IN, |
| TASKFILE_MULTI_OUT, |
| TASKFILE_IN, |
| TASKFILE_OUT, |
| TASKFILE_IN_DMA, |
| TASKFILE_OUT_DMA, |
| }; |
| |
| static void ide_tf_set_cmd(ide_drive_t *drive, ide_task_t *task, u8 dma) |
| { |
| u8 index, lba48, write; |
| |
| lba48 = (task->tf_flags & IDE_TFLAG_LBA48) ? 2 : 0; |
| write = (task->tf_flags & IDE_TFLAG_WRITE) ? 1 : 0; |
| |
| if (dma) |
| index = drive->vdma ? 4 : 8; |
| else |
| index = drive->mult_count ? 0 : 4; |
| |
| task->tf.command = ide_rw_cmds[index + lba48 + write]; |
| |
| if (dma) |
| index = 8; /* fixup index */ |
| |
| task->data_phase = ide_data_phases[index / 2 + write]; |
| } |
| |
| /* |
| * __ide_do_rw_disk() issues READ and WRITE commands to a disk, |
| * using LBA if supported, or CHS otherwise, to address sectors. |
| */ |
| static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq, sector_t block) |
| { |
| ide_hwif_t *hwif = HWIF(drive); |
| unsigned int dma = drive->using_dma; |
| u16 nsectors = (u16)rq->nr_sectors; |
| u8 lba48 = (drive->addressing == 1) ? 1 : 0; |
| ide_task_t task; |
| struct ide_taskfile *tf = &task.tf; |
| ide_startstop_t rc; |
| |
| if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) { |
| if (block + rq->nr_sectors > 1ULL << 28) |
| dma = 0; |
| else |
| lba48 = 0; |
| } |
| |
| if (!dma) { |
| ide_init_sg_cmd(drive, rq); |
| ide_map_sg(drive, rq); |
| } |
| |
| memset(&task, 0, sizeof(task)); |
| task.tf_flags = IDE_TFLAG_NO_SELECT_MASK; /* FIXME? */ |
| task.tf_flags |= (IDE_TFLAG_TF | IDE_TFLAG_DEVICE); |
| |
| if (drive->select.b.lba) { |
| if (lba48) { |
| pr_debug("%s: LBA=0x%012llx\n", drive->name, |
| (unsigned long long)block); |
| |
| tf->hob_nsect = (nsectors >> 8) & 0xff; |
| tf->hob_lbal = (u8)(block >> 24); |
| if (sizeof(block) != 4) { |
| tf->hob_lbam = (u8)((u64)block >> 32); |
| tf->hob_lbah = (u8)((u64)block >> 40); |
| } |
| |
| tf->nsect = nsectors & 0xff; |
| tf->lbal = (u8) block; |
| tf->lbam = (u8)(block >> 8); |
| tf->lbah = (u8)(block >> 16); |
| |
| task.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB); |
| } else { |
| tf->nsect = nsectors & 0xff; |
| tf->lbal = block; |
| tf->lbam = block >>= 8; |
| tf->lbah = block >>= 8; |
| tf->device = (block >> 8) & 0xf; |
| } |
| } else { |
| unsigned int sect,head,cyl,track; |
| track = (int)block / drive->sect; |
| sect = (int)block % drive->sect + 1; |
| head = track % drive->head; |
| cyl = track / drive->head; |
| |
| pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect); |
| |
| tf->nsect = nsectors & 0xff; |
| tf->lbal = sect; |
| tf->lbam = cyl; |
| tf->lbah = cyl >> 8; |
| tf->device = head; |
| } |
| |
| if (rq_data_dir(rq)) |
| task.tf_flags |= IDE_TFLAG_WRITE; |
| |
| ide_tf_set_cmd(drive, &task, dma); |
| if (!dma) |
| hwif->data_phase = task.data_phase; |
| task.rq = rq; |
| |
| rc = do_rw_taskfile(drive, &task); |
| |
| if (rc == ide_stopped && dma) { |
| /* fallback to PIO */ |
| task.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK; |
| ide_tf_set_cmd(drive, &task, 0); |
| hwif->data_phase = task.data_phase; |
| ide_init_sg_cmd(drive, rq); |
| rc = do_rw_taskfile(drive, &task); |
| } |
| |
| return rc; |
| } |
| |
| /* |
| * 268435455 == 137439 MB or 28bit limit |
| * 320173056 == 163929 MB or 48bit addressing |
| * 1073741822 == 549756 MB or 48bit addressing fake drive |
| */ |
| |
| static ide_startstop_t ide_do_rw_disk (ide_drive_t *drive, struct request *rq, sector_t block) |
| { |
| ide_hwif_t *hwif = HWIF(drive); |
| |
| BUG_ON(drive->blocked); |
| |
| if (!blk_fs_request(rq)) { |
| blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command"); |
| ide_end_request(drive, 0, 0); |
| return ide_stopped; |
| } |
| |
| ledtrig_ide_activity(); |
| |
| pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n", |
| drive->name, rq_data_dir(rq) == READ ? "read" : "writ", |
| (unsigned long long)block, rq->nr_sectors, |
| (unsigned long)rq->buffer); |
| |
| if (hwif->rw_disk) |
| hwif->rw_disk(drive, rq); |
| |
| return __ide_do_rw_disk(drive, rq, block); |
| } |
| |
| /* |
| * Queries for true maximum capacity of the drive. |
| * Returns maximum LBA address (> 0) of the drive, 0 if failed. |
| */ |
| static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48) |
| { |
| ide_task_t args; |
| struct ide_taskfile *tf = &args.tf; |
| u64 addr = 0; |
| |
| /* Create IDE/ATA command request structure */ |
| memset(&args, 0, sizeof(ide_task_t)); |
| if (lba48) |
| tf->command = WIN_READ_NATIVE_MAX_EXT; |
| else |
| tf->command = WIN_READ_NATIVE_MAX; |
| tf->device = ATA_LBA; |
| args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; |
| if (lba48) |
| args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB); |
| /* submit command request */ |
| ide_no_data_taskfile(drive, &args); |
| |
| /* if OK, compute maximum address value */ |
| if ((tf->status & 0x01) == 0) |
| addr = ide_get_lba_addr(tf, lba48) + 1; |
| |
| return addr; |
| } |
| |
| /* |
| * Sets maximum virtual LBA address of the drive. |
| * Returns new maximum virtual LBA address (> 0) or 0 on failure. |
| */ |
| static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48) |
| { |
| ide_task_t args; |
| struct ide_taskfile *tf = &args.tf; |
| u64 addr_set = 0; |
| |
| addr_req--; |
| /* Create IDE/ATA command request structure */ |
| memset(&args, 0, sizeof(ide_task_t)); |
| tf->lbal = (addr_req >> 0) & 0xff; |
| tf->lbam = (addr_req >>= 8) & 0xff; |
| tf->lbah = (addr_req >>= 8) & 0xff; |
| if (lba48) { |
| tf->hob_lbal = (addr_req >>= 8) & 0xff; |
| tf->hob_lbam = (addr_req >>= 8) & 0xff; |
| tf->hob_lbah = (addr_req >>= 8) & 0xff; |
| tf->command = WIN_SET_MAX_EXT; |
| } else { |
| tf->device = (addr_req >>= 8) & 0x0f; |
| tf->command = WIN_SET_MAX; |
| } |
| tf->device |= ATA_LBA; |
| args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; |
| if (lba48) |
| args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB); |
| /* submit command request */ |
| ide_no_data_taskfile(drive, &args); |
| /* if OK, compute maximum address value */ |
| if ((tf->status & 0x01) == 0) |
| addr_set = ide_get_lba_addr(tf, lba48) + 1; |
| |
| return addr_set; |
| } |
| |
| static unsigned long long sectors_to_MB(unsigned long long n) |
| { |
| n <<= 9; /* make it bytes */ |
| do_div(n, 1000000); /* make it MB */ |
| return n; |
| } |
| |
| /* |
| * Bits 10 of command_set_1 and cfs_enable_1 must be equal, |
| * so on non-buggy drives we need test only one. |
| * However, we should also check whether these fields are valid. |
| */ |
| static inline int idedisk_supports_hpa(const struct hd_driveid *id) |
| { |
| return (id->command_set_1 & 0x0400) && (id->cfs_enable_1 & 0x0400); |
| } |
| |
| /* |
| * The same here. |
| */ |
| static inline int idedisk_supports_lba48(const struct hd_driveid *id) |
| { |
| return (id->command_set_2 & 0x0400) && (id->cfs_enable_2 & 0x0400) |
| && id->lba_capacity_2; |
| } |
| |
| /* |
| * Some disks report total number of sectors instead of |
| * maximum sector address. We list them here. |
| */ |
| static const struct drive_list_entry hpa_list[] = { |
| { "ST340823A", NULL }, |
| { "ST320413A", NULL }, |
| { NULL, NULL } |
| }; |
| |
| static void idedisk_check_hpa(ide_drive_t *drive) |
| { |
| unsigned long long capacity, set_max; |
| int lba48 = idedisk_supports_lba48(drive->id); |
| |
| capacity = drive->capacity64; |
| |
| set_max = idedisk_read_native_max_address(drive, lba48); |
| |
| if (ide_in_drive_list(drive->id, hpa_list)) { |
| /* |
| * Since we are inclusive wrt to firmware revisions do this |
| * extra check and apply the workaround only when needed. |
| */ |
| if (set_max == capacity + 1) |
| set_max--; |
| } |
| |
| if (set_max <= capacity) |
| return; |
| |
| printk(KERN_INFO "%s: Host Protected Area detected.\n" |
| "\tcurrent capacity is %llu sectors (%llu MB)\n" |
| "\tnative capacity is %llu sectors (%llu MB)\n", |
| drive->name, |
| capacity, sectors_to_MB(capacity), |
| set_max, sectors_to_MB(set_max)); |
| |
| set_max = idedisk_set_max_address(drive, set_max, lba48); |
| |
| if (set_max) { |
| drive->capacity64 = set_max; |
| printk(KERN_INFO "%s: Host Protected Area disabled.\n", |
| drive->name); |
| } |
| } |
| |
| /* |
| * Compute drive->capacity, the full capacity of the drive |
| * Called with drive->id != NULL. |
| * |
| * To compute capacity, this uses either of |
| * |
| * 1. CHS value set by user (whatever user sets will be trusted) |
| * 2. LBA value from target drive (require new ATA feature) |
| * 3. LBA value from system BIOS (new one is OK, old one may break) |
| * 4. CHS value from system BIOS (traditional style) |
| * |
| * in above order (i.e., if value of higher priority is available, |
| * reset will be ignored). |
| */ |
| static void init_idedisk_capacity (ide_drive_t *drive) |
| { |
| struct hd_driveid *id = drive->id; |
| /* |
| * If this drive supports the Host Protected Area feature set, |
| * then we may need to change our opinion about the drive's capacity. |
| */ |
| int hpa = idedisk_supports_hpa(id); |
| |
| if (idedisk_supports_lba48(id)) { |
| /* drive speaks 48-bit LBA */ |
| drive->select.b.lba = 1; |
| drive->capacity64 = id->lba_capacity_2; |
| if (hpa) |
| idedisk_check_hpa(drive); |
| } else if ((id->capability & 2) && lba_capacity_is_ok(id)) { |
| /* drive speaks 28-bit LBA */ |
| drive->select.b.lba = 1; |
| drive->capacity64 = id->lba_capacity; |
| if (hpa) |
| idedisk_check_hpa(drive); |
| } else { |
| /* drive speaks boring old 28-bit CHS */ |
| drive->capacity64 = drive->cyl * drive->head * drive->sect; |
| } |
| } |
| |
| static sector_t idedisk_capacity (ide_drive_t *drive) |
| { |
| return drive->capacity64 - drive->sect0; |
| } |
| |
| #ifdef CONFIG_IDE_PROC_FS |
| static int smart_enable(ide_drive_t *drive) |
| { |
| ide_task_t args; |
| struct ide_taskfile *tf = &args.tf; |
| |
| memset(&args, 0, sizeof(ide_task_t)); |
| tf->feature = SMART_ENABLE; |
| tf->lbam = SMART_LCYL_PASS; |
| tf->lbah = SMART_HCYL_PASS; |
| tf->command = WIN_SMART; |
| args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; |
| return ide_no_data_taskfile(drive, &args); |
| } |
| |
| static int get_smart_data(ide_drive_t *drive, u8 *buf, u8 sub_cmd) |
| { |
| ide_task_t args; |
| struct ide_taskfile *tf = &args.tf; |
| |
| memset(&args, 0, sizeof(ide_task_t)); |
| tf->feature = sub_cmd; |
| tf->nsect = 0x01; |
| tf->lbam = SMART_LCYL_PASS; |
| tf->lbah = SMART_HCYL_PASS; |
| tf->command = WIN_SMART; |
| args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; |
| args.data_phase = TASKFILE_IN; |
| (void) smart_enable(drive); |
| return ide_raw_taskfile(drive, &args, buf, 1); |
| } |
| |
| static int proc_idedisk_read_cache |
| (char *page, char **start, off_t off, int count, int *eof, void *data) |
| { |
| ide_drive_t *drive = (ide_drive_t *) data; |
| char *out = page; |
| int len; |
| |
| if (drive->id_read) |
| len = sprintf(out,"%i\n", drive->id->buf_size / 2); |
| else |
| len = sprintf(out,"(none)\n"); |
| PROC_IDE_READ_RETURN(page,start,off,count,eof,len); |
| } |
| |
| static int proc_idedisk_read_capacity |
| (char *page, char **start, off_t off, int count, int *eof, void *data) |
| { |
| ide_drive_t*drive = (ide_drive_t *)data; |
| int len; |
| |
| len = sprintf(page,"%llu\n", (long long)idedisk_capacity(drive)); |
| PROC_IDE_READ_RETURN(page,start,off,count,eof,len); |
| } |
| |
| static int proc_idedisk_read_smart_thresholds |
| (char *page, char **start, off_t off, int count, int *eof, void *data) |
| { |
| ide_drive_t *drive = (ide_drive_t *)data; |
| int len = 0, i = 0; |
| |
| if (get_smart_data(drive, page, SMART_READ_THRESHOLDS) == 0) { |
| unsigned short *val = (unsigned short *) page; |
| char *out = ((char *)val) + (SECTOR_WORDS * 4); |
| page = out; |
| do { |
| out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n'); |
| val += 1; |
| } while (i < (SECTOR_WORDS * 2)); |
| len = out - page; |
| } |
| PROC_IDE_READ_RETURN(page,start,off,count,eof,len); |
| } |
| |
| static int proc_idedisk_read_smart_values |
| (char *page, char **start, off_t off, int count, int *eof, void *data) |
| { |
| ide_drive_t *drive = (ide_drive_t *)data; |
| int len = 0, i = 0; |
| |
| if (get_smart_data(drive, page, SMART_READ_VALUES) == 0) { |
| unsigned short *val = (unsigned short *) page; |
| char *out = ((char *)val) + (SECTOR_WORDS * 4); |
| page = out; |
| do { |
| out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n'); |
| val += 1; |
| } while (i < (SECTOR_WORDS * 2)); |
| len = out - page; |
| } |
| PROC_IDE_READ_RETURN(page,start,off,count,eof,len); |
| } |
| |
| static ide_proc_entry_t idedisk_proc[] = { |
| { "cache", S_IFREG|S_IRUGO, proc_idedisk_read_cache, NULL }, |
| { "capacity", S_IFREG|S_IRUGO, proc_idedisk_read_capacity, NULL }, |
| { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, |
| { "smart_values", S_IFREG|S_IRUSR, proc_idedisk_read_smart_values, NULL }, |
| { "smart_thresholds", S_IFREG|S_IRUSR, proc_idedisk_read_smart_thresholds, NULL }, |
| { NULL, 0, NULL, NULL } |
| }; |
| #endif /* CONFIG_IDE_PROC_FS */ |
| |
| static void idedisk_prepare_flush(struct request_queue *q, struct request *rq) |
| { |
| ide_drive_t *drive = q->queuedata; |
| ide_task_t task; |
| |
| memset(&task, 0, sizeof(task)); |
| if (ide_id_has_flush_cache_ext(drive->id) && |
| (drive->capacity64 >= (1UL << 28))) |
| task.tf.command = WIN_FLUSH_CACHE_EXT; |
| else |
| task.tf.command = WIN_FLUSH_CACHE; |
| task.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE; |
| task.data_phase = TASKFILE_NO_DATA; |
| |
| rq->cmd_type = REQ_TYPE_ATA_TASKFILE; |
| rq->cmd_flags |= REQ_SOFTBARRIER; |
| rq->special = &task; |
| } |
| |
| /* |
| * This is tightly woven into the driver->do_special can not touch. |
| * DON'T do it again until a total personality rewrite is committed. |
| */ |
| static int set_multcount(ide_drive_t *drive, int arg) |
| { |
| struct request rq; |
| |
| if (arg < 0 || arg > drive->id->max_multsect) |
| return -EINVAL; |
| |
| if (drive->special.b.set_multmode) |
| return -EBUSY; |
| ide_init_drive_cmd (&rq); |
| rq.cmd_type = REQ_TYPE_ATA_CMD; |
| drive->mult_req = arg; |
| drive->special.b.set_multmode = 1; |
| (void) ide_do_drive_cmd (drive, &rq, ide_wait); |
| return (drive->mult_count == arg) ? 0 : -EIO; |
| } |
| |
| static int set_nowerr(ide_drive_t *drive, int arg) |
| { |
| if (arg < 0 || arg > 1) |
| return -EINVAL; |
| |
| if (ide_spin_wait_hwgroup(drive)) |
| return -EBUSY; |
| drive->nowerr = arg; |
| drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT; |
| spin_unlock_irq(&ide_lock); |
| return 0; |
| } |
| |
| static void update_ordered(ide_drive_t *drive) |
| { |
| struct hd_driveid *id = drive->id; |
| unsigned ordered = QUEUE_ORDERED_NONE; |
| prepare_flush_fn *prep_fn = NULL; |
| |
| if (drive->wcache) { |
| unsigned long long capacity; |
| int barrier; |
| /* |
| * We must avoid issuing commands a drive does not |
| * understand or we may crash it. We check flush cache |
| * is supported. We also check we have the LBA48 flush |
| * cache if the drive capacity is too large. By this |
| * time we have trimmed the drive capacity if LBA48 is |
| * not available so we don't need to recheck that. |
| */ |
| capacity = idedisk_capacity(drive); |
| barrier = ide_id_has_flush_cache(id) && !drive->noflush && |
| (drive->addressing == 0 || capacity <= (1ULL << 28) || |
| ide_id_has_flush_cache_ext(id)); |
| |
| printk(KERN_INFO "%s: cache flushes %ssupported\n", |
| drive->name, barrier ? "" : "not "); |
| |
| if (barrier) { |
| ordered = QUEUE_ORDERED_DRAIN_FLUSH; |
| prep_fn = idedisk_prepare_flush; |
| } |
| } else |
| ordered = QUEUE_ORDERED_DRAIN; |
| |
| blk_queue_ordered(drive->queue, ordered, prep_fn); |
| } |
| |
| static int write_cache(ide_drive_t *drive, int arg) |
| { |
| ide_task_t args; |
| int err = 1; |
| |
| if (arg < 0 || arg > 1) |
| return -EINVAL; |
| |
| if (ide_id_has_flush_cache(drive->id)) { |
| memset(&args, 0, sizeof(ide_task_t)); |
| args.tf.feature = arg ? |
| SETFEATURES_EN_WCACHE : SETFEATURES_DIS_WCACHE; |
| args.tf.command = WIN_SETFEATURES; |
| args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; |
| err = ide_no_data_taskfile(drive, &args); |
| if (err == 0) |
| drive->wcache = arg; |
| } |
| |
| update_ordered(drive); |
| |
| return err; |
| } |
| |
| static int do_idedisk_flushcache (ide_drive_t *drive) |
| { |
| ide_task_t args; |
| |
| memset(&args, 0, sizeof(ide_task_t)); |
| if (ide_id_has_flush_cache_ext(drive->id)) |
| args.tf.command = WIN_FLUSH_CACHE_EXT; |
| else |
| args.tf.command = WIN_FLUSH_CACHE; |
| args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; |
| return ide_no_data_taskfile(drive, &args); |
| } |
| |
| static int set_acoustic (ide_drive_t *drive, int arg) |
| { |
| ide_task_t args; |
| |
| if (arg < 0 || arg > 254) |
| return -EINVAL; |
| |
| memset(&args, 0, sizeof(ide_task_t)); |
| args.tf.feature = arg ? SETFEATURES_EN_AAM : SETFEATURES_DIS_AAM; |
| args.tf.nsect = arg; |
| args.tf.command = WIN_SETFEATURES; |
| args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; |
| ide_no_data_taskfile(drive, &args); |
| drive->acoustic = arg; |
| return 0; |
| } |
| |
| /* |
| * drive->addressing: |
| * 0: 28-bit |
| * 1: 48-bit |
| * 2: 48-bit capable doing 28-bit |
| */ |
| static int set_lba_addressing(ide_drive_t *drive, int arg) |
| { |
| if (arg < 0 || arg > 2) |
| return -EINVAL; |
| |
| drive->addressing = 0; |
| |
| if (drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) |
| return 0; |
| |
| if (!idedisk_supports_lba48(drive->id)) |
| return -EIO; |
| drive->addressing = arg; |
| return 0; |
| } |
| |
| #ifdef CONFIG_IDE_PROC_FS |
| static void idedisk_add_settings(ide_drive_t *drive) |
| { |
| struct hd_driveid *id = drive->id; |
| |
| ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 65535, 1, 1, &drive->bios_cyl, NULL); |
| ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); |
| ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); |
| ide_add_setting(drive, "address", SETTING_RW, TYPE_BYTE, 0, 2, 1, 1, &drive->addressing, set_lba_addressing); |
| ide_add_setting(drive, "multcount", SETTING_RW, TYPE_BYTE, 0, id->max_multsect, 1, 1, &drive->mult_count, set_multcount); |
| ide_add_setting(drive, "nowerr", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->nowerr, set_nowerr); |
| ide_add_setting(drive, "lun", SETTING_RW, TYPE_INT, 0, 7, 1, 1, &drive->lun, NULL); |
| ide_add_setting(drive, "wcache", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->wcache, write_cache); |
| ide_add_setting(drive, "acoustic", SETTING_RW, TYPE_BYTE, 0, 254, 1, 1, &drive->acoustic, set_acoustic); |
| ide_add_setting(drive, "failures", SETTING_RW, TYPE_INT, 0, 65535, 1, 1, &drive->failures, NULL); |
| ide_add_setting(drive, "max_failures", SETTING_RW, TYPE_INT, 0, 65535, 1, 1, &drive->max_failures, NULL); |
| } |
| #else |
| static inline void idedisk_add_settings(ide_drive_t *drive) { ; } |
| #endif |
| |
| static void idedisk_setup (ide_drive_t *drive) |
| { |
| ide_hwif_t *hwif = drive->hwif; |
| struct hd_driveid *id = drive->id; |
| unsigned long long capacity; |
| |
| idedisk_add_settings(drive); |
| |
| if (drive->id_read == 0) |
| return; |
| |
| if (drive->removable) { |
| /* |
| * Removable disks (eg. SYQUEST); ignore 'WD' drives |
| */ |
| if (id->model[0] != 'W' || id->model[1] != 'D') { |
| drive->doorlocking = 1; |
| } |
| } |
| |
| (void)set_lba_addressing(drive, 1); |
| |
| if (drive->addressing == 1) { |
| int max_s = 2048; |
| |
| if (max_s > hwif->rqsize) |
| max_s = hwif->rqsize; |
| |
| blk_queue_max_sectors(drive->queue, max_s); |
| } |
| |
| printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name, drive->queue->max_sectors / 2); |
| |
| /* calculate drive capacity, and select LBA if possible */ |
| init_idedisk_capacity (drive); |
| |
| /* limit drive capacity to 137GB if LBA48 cannot be used */ |
| if (drive->addressing == 0 && drive->capacity64 > 1ULL << 28) { |
| printk(KERN_WARNING "%s: cannot use LBA48 - full capacity " |
| "%llu sectors (%llu MB)\n", |
| drive->name, (unsigned long long)drive->capacity64, |
| sectors_to_MB(drive->capacity64)); |
| drive->capacity64 = 1ULL << 28; |
| } |
| |
| if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && drive->addressing) { |
| if (drive->capacity64 > 1ULL << 28) { |
| printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode will" |
| " be used for accessing sectors > %u\n", |
| drive->name, 1 << 28); |
| } else |
| drive->addressing = 0; |
| } |
| |
| /* |
| * if possible, give fdisk access to more of the drive, |
| * by correcting bios_cyls: |
| */ |
| capacity = idedisk_capacity (drive); |
| if (!drive->forced_geom) { |
| |
| if (idedisk_supports_lba48(drive->id)) { |
| /* compatibility */ |
| drive->bios_sect = 63; |
| drive->bios_head = 255; |
| } |
| |
| if (drive->bios_sect && drive->bios_head) { |
| unsigned int cap0 = capacity; /* truncate to 32 bits */ |
| unsigned int cylsz, cyl; |
| |
| if (cap0 != capacity) |
| drive->bios_cyl = 65535; |
| else { |
| cylsz = drive->bios_sect * drive->bios_head; |
| cyl = cap0 / cylsz; |
| if (cyl > 65535) |
| cyl = 65535; |
| if (cyl > drive->bios_cyl) |
| drive->bios_cyl = cyl; |
| } |
| } |
| } |
| printk(KERN_INFO "%s: %llu sectors (%llu MB)", |
| drive->name, capacity, sectors_to_MB(capacity)); |
| |
| /* Only print cache size when it was specified */ |
| if (id->buf_size) |
| printk (" w/%dKiB Cache", id->buf_size/2); |
| |
| printk(KERN_CONT ", CHS=%d/%d/%d\n", |
| drive->bios_cyl, drive->bios_head, drive->bios_sect); |
| |
| /* write cache enabled? */ |
| if ((id->csfo & 1) || (id->cfs_enable_1 & (1 << 5))) |
| drive->wcache = 1; |
| |
| write_cache(drive, 1); |
| } |
| |
| static void ide_cacheflush_p(ide_drive_t *drive) |
| { |
| if (!drive->wcache || !ide_id_has_flush_cache(drive->id)) |
| return; |
| |
| if (do_idedisk_flushcache(drive)) |
| printk(KERN_INFO "%s: wcache flush failed!\n", drive->name); |
| } |
| |
| static void ide_disk_remove(ide_drive_t *drive) |
| { |
| struct ide_disk_obj *idkp = drive->driver_data; |
| struct gendisk *g = idkp->disk; |
| |
| ide_proc_unregister_driver(drive, idkp->driver); |
| |
| del_gendisk(g); |
| |
| ide_cacheflush_p(drive); |
| |
| ide_disk_put(idkp); |
| } |
| |
| static void ide_disk_release(struct kref *kref) |
| { |
| struct ide_disk_obj *idkp = to_ide_disk(kref); |
| ide_drive_t *drive = idkp->drive; |
| struct gendisk *g = idkp->disk; |
| |
| drive->driver_data = NULL; |
| g->private_data = NULL; |
| put_disk(g); |
| kfree(idkp); |
| } |
| |
| static int ide_disk_probe(ide_drive_t *drive); |
| |
| /* |
| * On HPA drives the capacity needs to be |
| * reinitilized on resume otherwise the disk |
| * can not be used and a hard reset is required |
| */ |
| static void ide_disk_resume(ide_drive_t *drive) |
| { |
| if (idedisk_supports_hpa(drive->id)) |
| init_idedisk_capacity(drive); |
| } |
| |
| static void ide_device_shutdown(ide_drive_t *drive) |
| { |
| #ifdef CONFIG_ALPHA |
| /* On Alpha, halt(8) doesn't actually turn the machine off, |
| it puts you into the sort of firmware monitor. Typically, |
| it's used to boot another kernel image, so it's not much |
| different from reboot(8). Therefore, we don't need to |
| spin down the disk in this case, especially since Alpha |
| firmware doesn't handle disks in standby mode properly. |
| On the other hand, it's reasonably safe to turn the power |
| off when the shutdown process reaches the firmware prompt, |
| as the firmware initialization takes rather long time - |
| at least 10 seconds, which should be sufficient for |
| the disk to expire its write cache. */ |
| if (system_state != SYSTEM_POWER_OFF) { |
| #else |
| if (system_state == SYSTEM_RESTART) { |
| #endif |
| ide_cacheflush_p(drive); |
| return; |
| } |
| |
| printk("Shutdown: %s\n", drive->name); |
| drive->gendev.bus->suspend(&drive->gendev, PMSG_SUSPEND); |
| } |
| |
| static ide_driver_t idedisk_driver = { |
| .gen_driver = { |
| .owner = THIS_MODULE, |
| .name = "ide-disk", |
| .bus = &ide_bus_type, |
| }, |
| .probe = ide_disk_probe, |
| .remove = ide_disk_remove, |
| .resume = ide_disk_resume, |
| .shutdown = ide_device_shutdown, |
| .version = IDEDISK_VERSION, |
| .media = ide_disk, |
| .supports_dsc_overlap = 0, |
| .do_request = ide_do_rw_disk, |
| .end_request = ide_end_request, |
| .error = __ide_error, |
| .abort = __ide_abort, |
| #ifdef CONFIG_IDE_PROC_FS |
| .proc = idedisk_proc, |
| #endif |
| }; |
| |
| static int idedisk_set_doorlock(ide_drive_t *drive, int on) |
| { |
| ide_task_t task; |
| |
| memset(&task, 0, sizeof(task)); |
| task.tf.command = on ? WIN_DOORLOCK : WIN_DOORUNLOCK; |
| task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; |
| |
| return ide_no_data_taskfile(drive, &task); |
| } |
| |
| static int idedisk_open(struct inode *inode, struct file *filp) |
| { |
| struct gendisk *disk = inode->i_bdev->bd_disk; |
| struct ide_disk_obj *idkp; |
| ide_drive_t *drive; |
| |
| if (!(idkp = ide_disk_get(disk))) |
| return -ENXIO; |
| |
| drive = idkp->drive; |
| |
| idkp->openers++; |
| |
| if (drive->removable && idkp->openers == 1) { |
| check_disk_change(inode->i_bdev); |
| /* |
| * Ignore the return code from door_lock, |
| * since the open() has already succeeded, |
| * and the door_lock is irrelevant at this point. |
| */ |
| if (drive->doorlocking && idedisk_set_doorlock(drive, 1)) |
| drive->doorlocking = 0; |
| } |
| return 0; |
| } |
| |
| static int idedisk_release(struct inode *inode, struct file *filp) |
| { |
| struct gendisk *disk = inode->i_bdev->bd_disk; |
| struct ide_disk_obj *idkp = ide_disk_g(disk); |
| ide_drive_t *drive = idkp->drive; |
| |
| if (idkp->openers == 1) |
| ide_cacheflush_p(drive); |
| |
| if (drive->removable && idkp->openers == 1) { |
| if (drive->doorlocking && idedisk_set_doorlock(drive, 0)) |
| drive->doorlocking = 0; |
| } |
| |
| idkp->openers--; |
| |
| ide_disk_put(idkp); |
| |
| return 0; |
| } |
| |
| static int idedisk_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
| { |
| struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk); |
| ide_drive_t *drive = idkp->drive; |
| |
| geo->heads = drive->bios_head; |
| geo->sectors = drive->bios_sect; |
| geo->cylinders = (u16)drive->bios_cyl; /* truncate */ |
| return 0; |
| } |
| |
| static int idedisk_ioctl(struct inode *inode, struct file *file, |
| unsigned int cmd, unsigned long arg) |
| { |
| unsigned long flags; |
| struct block_device *bdev = inode->i_bdev; |
| struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk); |
| ide_drive_t *drive = idkp->drive; |
| int err, (*setfunc)(ide_drive_t *, int); |
| u8 *val; |
| |
| switch (cmd) { |
| case HDIO_GET_ADDRESS: val = &drive->addressing; goto read_val; |
| case HDIO_GET_MULTCOUNT: val = &drive->mult_count; goto read_val; |
| case HDIO_GET_NOWERR: val = &drive->nowerr; goto read_val; |
| case HDIO_GET_WCACHE: val = &drive->wcache; goto read_val; |
| case HDIO_GET_ACOUSTIC: val = &drive->acoustic; goto read_val; |
| case HDIO_SET_ADDRESS: setfunc = set_lba_addressing; goto set_val; |
| case HDIO_SET_MULTCOUNT: setfunc = set_multcount; goto set_val; |
| case HDIO_SET_NOWERR: setfunc = set_nowerr; goto set_val; |
| case HDIO_SET_WCACHE: setfunc = write_cache; goto set_val; |
| case HDIO_SET_ACOUSTIC: setfunc = set_acoustic; goto set_val; |
| } |
| |
| return generic_ide_ioctl(drive, file, bdev, cmd, arg); |
| |
| read_val: |
| mutex_lock(&ide_setting_mtx); |
| spin_lock_irqsave(&ide_lock, flags); |
| err = *val; |
| spin_unlock_irqrestore(&ide_lock, flags); |
| mutex_unlock(&ide_setting_mtx); |
| return err >= 0 ? put_user(err, (long __user *)arg) : err; |
| |
| set_val: |
| if (bdev != bdev->bd_contains) |
| err = -EINVAL; |
| else { |
| if (!capable(CAP_SYS_ADMIN)) |
| err = -EACCES; |
| else { |
| mutex_lock(&ide_setting_mtx); |
| err = setfunc(drive, arg); |
| mutex_unlock(&ide_setting_mtx); |
| } |
| } |
| return err; |
| } |
| |
| static int idedisk_media_changed(struct gendisk *disk) |
| { |
| struct ide_disk_obj *idkp = ide_disk_g(disk); |
| ide_drive_t *drive = idkp->drive; |
| |
| /* do not scan partitions twice if this is a removable device */ |
| if (drive->attach) { |
| drive->attach = 0; |
| return 0; |
| } |
| /* if removable, always assume it was changed */ |
| return drive->removable; |
| } |
| |
| static int idedisk_revalidate_disk(struct gendisk *disk) |
| { |
| struct ide_disk_obj *idkp = ide_disk_g(disk); |
| set_capacity(disk, idedisk_capacity(idkp->drive)); |
| return 0; |
| } |
| |
| static struct block_device_operations idedisk_ops = { |
| .owner = THIS_MODULE, |
| .open = idedisk_open, |
| .release = idedisk_release, |
| .ioctl = idedisk_ioctl, |
| .getgeo = idedisk_getgeo, |
| .media_changed = idedisk_media_changed, |
| .revalidate_disk= idedisk_revalidate_disk |
| }; |
| |
| MODULE_DESCRIPTION("ATA DISK Driver"); |
| |
| static int ide_disk_probe(ide_drive_t *drive) |
| { |
| struct ide_disk_obj *idkp; |
| struct gendisk *g; |
| |
| /* strstr("foo", "") is non-NULL */ |
| if (!strstr("ide-disk", drive->driver_req)) |
| goto failed; |
| if (!drive->present) |
| goto failed; |
| if (drive->media != ide_disk) |
| goto failed; |
| |
| idkp = kzalloc(sizeof(*idkp), GFP_KERNEL); |
| if (!idkp) |
| goto failed; |
| |
| g = alloc_disk_node(1 << PARTN_BITS, |
| hwif_to_node(drive->hwif)); |
| if (!g) |
| goto out_free_idkp; |
| |
| ide_init_disk(g, drive); |
| |
| ide_proc_register_driver(drive, &idedisk_driver); |
| |
| kref_init(&idkp->kref); |
| |
| idkp->drive = drive; |
| idkp->driver = &idedisk_driver; |
| idkp->disk = g; |
| |
| g->private_data = &idkp->driver; |
| |
| drive->driver_data = idkp; |
| |
| idedisk_setup(drive); |
| if ((!drive->head || drive->head > 16) && !drive->select.b.lba) { |
| printk(KERN_ERR "%s: INVALID GEOMETRY: %d PHYSICAL HEADS?\n", |
| drive->name, drive->head); |
| drive->attach = 0; |
| } else |
| drive->attach = 1; |
| |
| g->minors = 1 << PARTN_BITS; |
| g->driverfs_dev = &drive->gendev; |
| g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; |
| set_capacity(g, idedisk_capacity(drive)); |
| g->fops = &idedisk_ops; |
| add_disk(g); |
| return 0; |
| |
| out_free_idkp: |
| kfree(idkp); |
| failed: |
| return -ENODEV; |
| } |
| |
| static void __exit idedisk_exit (void) |
| { |
| driver_unregister(&idedisk_driver.gen_driver); |
| } |
| |
| static int __init idedisk_init(void) |
| { |
| return driver_register(&idedisk_driver.gen_driver); |
| } |
| |
| MODULE_ALIAS("ide:*m-disk*"); |
| module_init(idedisk_init); |
| module_exit(idedisk_exit); |
| MODULE_LICENSE("GPL"); |