| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * 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 |
| * Copyright (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz |
| */ |
| |
| /* |
| * 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. |
| */ |
| |
| #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> |
| #include <linux/ide.h> |
| |
| #include <asm/byteorder.h> |
| #include <asm/irq.h> |
| #include <linux/uaccess.h> |
| #include <asm/io.h> |
| #include <asm/div64.h> |
| |
| #include "ide-disk.h" |
| |
| static const u8 ide_rw_cmds[] = { |
| ATA_CMD_READ_MULTI, |
| ATA_CMD_WRITE_MULTI, |
| ATA_CMD_READ_MULTI_EXT, |
| ATA_CMD_WRITE_MULTI_EXT, |
| ATA_CMD_PIO_READ, |
| ATA_CMD_PIO_WRITE, |
| ATA_CMD_PIO_READ_EXT, |
| ATA_CMD_PIO_WRITE_EXT, |
| ATA_CMD_READ, |
| ATA_CMD_WRITE, |
| ATA_CMD_READ_EXT, |
| ATA_CMD_WRITE_EXT, |
| }; |
| |
| static void ide_tf_set_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 dma) |
| { |
| u8 index, lba48, write; |
| |
| lba48 = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 2 : 0; |
| write = (cmd->tf_flags & IDE_TFLAG_WRITE) ? 1 : 0; |
| |
| if (dma) { |
| cmd->protocol = ATA_PROT_DMA; |
| index = 8; |
| } else { |
| cmd->protocol = ATA_PROT_PIO; |
| if (drive->mult_count) { |
| cmd->tf_flags |= IDE_TFLAG_MULTI_PIO; |
| index = 0; |
| } else |
| index = 4; |
| } |
| |
| cmd->tf.command = ide_rw_cmds[index + lba48 + 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 = drive->hwif; |
| u16 nsectors = (u16)blk_rq_sectors(rq); |
| u8 lba48 = !!(drive->dev_flags & IDE_DFLAG_LBA48); |
| u8 dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); |
| struct ide_cmd cmd; |
| struct ide_taskfile *tf = &cmd.tf; |
| ide_startstop_t rc; |
| |
| if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) { |
| if (block + blk_rq_sectors(rq) > 1ULL << 28) |
| dma = 0; |
| else |
| lba48 = 0; |
| } |
| |
| memset(&cmd, 0, sizeof(cmd)); |
| cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; |
| cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; |
| |
| if (drive->dev_flags & IDE_DFLAG_LBA) { |
| if (lba48) { |
| pr_debug("%s: LBA=0x%012llx\n", drive->name, |
| (unsigned long long)block); |
| |
| tf->nsect = nsectors & 0xff; |
| tf->lbal = (u8) block; |
| tf->lbam = (u8)(block >> 8); |
| tf->lbah = (u8)(block >> 16); |
| tf->device = ATA_LBA; |
| |
| tf = &cmd.hob; |
| tf->nsect = (nsectors >> 8) & 0xff; |
| tf->lbal = (u8)(block >> 24); |
| if (sizeof(block) != 4) { |
| tf->lbam = (u8)((u64)block >> 32); |
| tf->lbah = (u8)((u64)block >> 40); |
| } |
| |
| cmd.valid.out.hob = IDE_VALID_OUT_HOB; |
| cmd.valid.in.hob = IDE_VALID_IN_HOB; |
| cmd.tf_flags |= IDE_TFLAG_LBA48; |
| } else { |
| tf->nsect = nsectors & 0xff; |
| tf->lbal = block; |
| tf->lbam = block >>= 8; |
| tf->lbah = block >>= 8; |
| tf->device = ((block >> 8) & 0xf) | ATA_LBA; |
| } |
| } 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; |
| } |
| |
| cmd.tf_flags |= IDE_TFLAG_FS; |
| |
| if (rq_data_dir(rq)) |
| cmd.tf_flags |= IDE_TFLAG_WRITE; |
| |
| ide_tf_set_cmd(drive, &cmd, dma); |
| cmd.rq = rq; |
| |
| if (dma == 0) { |
| ide_init_sg_cmd(&cmd, nsectors << 9); |
| ide_map_sg(drive, &cmd); |
| } |
| |
| rc = do_rw_taskfile(drive, &cmd); |
| |
| if (rc == ide_stopped && dma) { |
| /* fallback to PIO */ |
| cmd.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK; |
| ide_tf_set_cmd(drive, &cmd, 0); |
| ide_init_sg_cmd(&cmd, nsectors << 9); |
| rc = do_rw_taskfile(drive, &cmd); |
| } |
| |
| 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 = drive->hwif; |
| |
| BUG_ON(drive->dev_flags & IDE_DFLAG_BLOCKED); |
| BUG_ON(blk_rq_is_passthrough(rq)); |
| |
| ledtrig_disk_activity(); |
| |
| pr_debug("%s: %sing: block=%llu, sectors=%u\n", |
| drive->name, rq_data_dir(rq) == READ ? "read" : "writ", |
| (unsigned long long)block, blk_rq_sectors(rq)); |
| |
| 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) |
| { |
| struct ide_cmd cmd; |
| struct ide_taskfile *tf = &cmd.tf; |
| u64 addr = 0; |
| |
| memset(&cmd, 0, sizeof(cmd)); |
| if (lba48) |
| tf->command = ATA_CMD_READ_NATIVE_MAX_EXT; |
| else |
| tf->command = ATA_CMD_READ_NATIVE_MAX; |
| tf->device = ATA_LBA; |
| |
| cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; |
| cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; |
| if (lba48) { |
| cmd.valid.out.hob = IDE_VALID_OUT_HOB; |
| cmd.valid.in.hob = IDE_VALID_IN_HOB; |
| cmd.tf_flags = IDE_TFLAG_LBA48; |
| } |
| |
| ide_no_data_taskfile(drive, &cmd); |
| |
| /* if OK, compute maximum address value */ |
| if (!(tf->status & ATA_ERR)) |
| addr = ide_get_lba_addr(&cmd, 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) |
| { |
| struct ide_cmd cmd; |
| struct ide_taskfile *tf = &cmd.tf; |
| u64 addr_set = 0; |
| |
| addr_req--; |
| |
| memset(&cmd, 0, sizeof(cmd)); |
| tf->lbal = (addr_req >> 0) & 0xff; |
| tf->lbam = (addr_req >>= 8) & 0xff; |
| tf->lbah = (addr_req >>= 8) & 0xff; |
| if (lba48) { |
| cmd.hob.lbal = (addr_req >>= 8) & 0xff; |
| cmd.hob.lbam = (addr_req >>= 8) & 0xff; |
| cmd.hob.lbah = (addr_req >>= 8) & 0xff; |
| tf->command = ATA_CMD_SET_MAX_EXT; |
| } else { |
| tf->device = (addr_req >>= 8) & 0x0f; |
| tf->command = ATA_CMD_SET_MAX; |
| } |
| tf->device |= ATA_LBA; |
| |
| cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; |
| cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; |
| if (lba48) { |
| cmd.valid.out.hob = IDE_VALID_OUT_HOB; |
| cmd.valid.in.hob = IDE_VALID_IN_HOB; |
| cmd.tf_flags = IDE_TFLAG_LBA48; |
| } |
| |
| ide_no_data_taskfile(drive, &cmd); |
| |
| /* if OK, compute maximum address value */ |
| if (!(tf->status & ATA_ERR)) |
| addr_set = ide_get_lba_addr(&cmd, 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; |
| } |
| |
| /* |
| * 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 }, |
| { "ST310211A", NULL }, |
| { NULL, NULL } |
| }; |
| |
| static u64 ide_disk_hpa_get_native_capacity(ide_drive_t *drive, int lba48) |
| { |
| u64 capacity, set_max; |
| |
| 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--; |
| } |
| |
| return set_max; |
| } |
| |
| static u64 ide_disk_hpa_set_capacity(ide_drive_t *drive, u64 set_max, int lba48) |
| { |
| set_max = idedisk_set_max_address(drive, set_max, lba48); |
| if (set_max) |
| drive->capacity64 = set_max; |
| |
| return set_max; |
| } |
| |
| static void idedisk_check_hpa(ide_drive_t *drive) |
| { |
| u64 capacity, set_max; |
| int lba48 = ata_id_lba48_enabled(drive->id); |
| |
| capacity = drive->capacity64; |
| set_max = ide_disk_hpa_get_native_capacity(drive, lba48); |
| |
| if (set_max <= capacity) |
| return; |
| |
| drive->probed_capacity = set_max; |
| |
| 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)); |
| |
| if ((drive->dev_flags & IDE_DFLAG_NOHPA) == 0) |
| return; |
| |
| set_max = ide_disk_hpa_set_capacity(drive, set_max, lba48); |
| if (set_max) |
| printk(KERN_INFO "%s: Host Protected Area disabled.\n", |
| drive->name); |
| } |
| |
| static int ide_disk_get_capacity(ide_drive_t *drive) |
| { |
| u16 *id = drive->id; |
| int lba; |
| |
| if (ata_id_lba48_enabled(id)) { |
| /* drive speaks 48-bit LBA */ |
| lba = 1; |
| drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2); |
| } else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) { |
| /* drive speaks 28-bit LBA */ |
| lba = 1; |
| drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY); |
| } else { |
| /* drive speaks boring old 28-bit CHS */ |
| lba = 0; |
| drive->capacity64 = drive->cyl * drive->head * drive->sect; |
| } |
| |
| drive->probed_capacity = drive->capacity64; |
| |
| if (lba) { |
| drive->dev_flags |= IDE_DFLAG_LBA; |
| |
| /* |
| * If this device supports the Host Protected Area feature set, |
| * then we may need to change our opinion about its capacity. |
| */ |
| if (ata_id_hpa_enabled(id)) |
| idedisk_check_hpa(drive); |
| } |
| |
| /* limit drive capacity to 137GB if LBA48 cannot be used */ |
| if ((drive->dev_flags & IDE_DFLAG_LBA48) == 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->probed_capacity = drive->capacity64 = 1ULL << 28; |
| } |
| |
| if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && |
| (drive->dev_flags & IDE_DFLAG_LBA48)) { |
| 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->dev_flags &= ~IDE_DFLAG_LBA48; |
| } |
| |
| return 0; |
| } |
| |
| static void ide_disk_unlock_native_capacity(ide_drive_t *drive) |
| { |
| u16 *id = drive->id; |
| int lba48 = ata_id_lba48_enabled(id); |
| |
| if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 || |
| ata_id_hpa_enabled(id) == 0) |
| return; |
| |
| /* |
| * according to the spec the SET MAX ADDRESS command shall be |
| * immediately preceded by a READ NATIVE MAX ADDRESS command |
| */ |
| if (!ide_disk_hpa_get_native_capacity(drive, lba48)) |
| return; |
| |
| if (ide_disk_hpa_set_capacity(drive, drive->probed_capacity, lba48)) |
| drive->dev_flags |= IDE_DFLAG_NOHPA; /* disable HPA on resume */ |
| } |
| |
| static int idedisk_prep_fn(struct request_queue *q, struct request *rq) |
| { |
| ide_drive_t *drive = q->queuedata; |
| struct ide_cmd *cmd; |
| |
| if (req_op(rq) != REQ_OP_FLUSH) |
| return BLKPREP_OK; |
| |
| if (rq->special) { |
| cmd = rq->special; |
| memset(cmd, 0, sizeof(*cmd)); |
| } else { |
| cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC); |
| } |
| |
| /* FIXME: map struct ide_taskfile on rq->cmd[] */ |
| BUG_ON(cmd == NULL); |
| |
| if (ata_id_flush_ext_enabled(drive->id) && |
| (drive->capacity64 >= (1UL << 28))) |
| cmd->tf.command = ATA_CMD_FLUSH_EXT; |
| else |
| cmd->tf.command = ATA_CMD_FLUSH; |
| cmd->valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; |
| cmd->tf_flags = IDE_TFLAG_DYN; |
| cmd->protocol = ATA_PROT_NODATA; |
| rq->cmd_flags &= ~REQ_OP_MASK; |
| rq->cmd_flags |= REQ_OP_DRV_OUT; |
| ide_req(rq)->type = ATA_PRIV_TASKFILE; |
| rq->special = cmd; |
| cmd->rq = rq; |
| |
| return BLKPREP_OK; |
| } |
| |
| ide_devset_get(multcount, mult_count); |
| |
| /* |
| * 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[ATA_ID_MAX_MULTSECT] & 0xff)) |
| return -EINVAL; |
| |
| if (drive->special_flags & IDE_SFLAG_SET_MULTMODE) |
| return -EBUSY; |
| |
| rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM); |
| ide_req(rq)->type = ATA_PRIV_TASKFILE; |
| |
| drive->mult_req = arg; |
| drive->special_flags |= IDE_SFLAG_SET_MULTMODE; |
| blk_execute_rq(drive->queue, NULL, rq, 0); |
| blk_put_request(rq); |
| |
| return (drive->mult_count == arg) ? 0 : -EIO; |
| } |
| |
| ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR); |
| |
| static int set_nowerr(ide_drive_t *drive, int arg) |
| { |
| if (arg < 0 || arg > 1) |
| return -EINVAL; |
| |
| if (arg) |
| drive->dev_flags |= IDE_DFLAG_NOWERR; |
| else |
| drive->dev_flags &= ~IDE_DFLAG_NOWERR; |
| |
| drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT; |
| |
| return 0; |
| } |
| |
| static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect) |
| { |
| struct ide_cmd cmd; |
| |
| memset(&cmd, 0, sizeof(cmd)); |
| cmd.tf.feature = feature; |
| cmd.tf.nsect = nsect; |
| cmd.tf.command = ATA_CMD_SET_FEATURES; |
| cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; |
| cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; |
| |
| return ide_no_data_taskfile(drive, &cmd); |
| } |
| |
| static void update_flush(ide_drive_t *drive) |
| { |
| u16 *id = drive->id; |
| bool wc = false; |
| |
| if (drive->dev_flags & IDE_DFLAG_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 = ide_gd_capacity(drive); |
| barrier = ata_id_flush_enabled(id) && |
| (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 && |
| ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 || |
| capacity <= (1ULL << 28) || |
| ata_id_flush_ext_enabled(id)); |
| |
| printk(KERN_INFO "%s: cache flushes %ssupported\n", |
| drive->name, barrier ? "" : "not "); |
| |
| if (barrier) { |
| wc = true; |
| blk_queue_prep_rq(drive->queue, idedisk_prep_fn); |
| } |
| } |
| |
| blk_queue_write_cache(drive->queue, wc, false); |
| } |
| |
| ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE); |
| |
| static int set_wcache(ide_drive_t *drive, int arg) |
| { |
| int err = 1; |
| |
| if (arg < 0 || arg > 1) |
| return -EINVAL; |
| |
| if (ata_id_flush_enabled(drive->id)) { |
| err = ide_do_setfeature(drive, |
| arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0); |
| if (err == 0) { |
| if (arg) |
| drive->dev_flags |= IDE_DFLAG_WCACHE; |
| else |
| drive->dev_flags &= ~IDE_DFLAG_WCACHE; |
| } |
| } |
| |
| update_flush(drive); |
| |
| return err; |
| } |
| |
| static int do_idedisk_flushcache(ide_drive_t *drive) |
| { |
| struct ide_cmd cmd; |
| |
| memset(&cmd, 0, sizeof(cmd)); |
| if (ata_id_flush_ext_enabled(drive->id)) |
| cmd.tf.command = ATA_CMD_FLUSH_EXT; |
| else |
| cmd.tf.command = ATA_CMD_FLUSH; |
| cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; |
| cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; |
| |
| return ide_no_data_taskfile(drive, &cmd); |
| } |
| |
| ide_devset_get(acoustic, acoustic); |
| |
| static int set_acoustic(ide_drive_t *drive, int arg) |
| { |
| if (arg < 0 || arg > 254) |
| return -EINVAL; |
| |
| ide_do_setfeature(drive, |
| arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg); |
| |
| drive->acoustic = arg; |
| |
| return 0; |
| } |
| |
| ide_devset_get_flag(addressing, IDE_DFLAG_LBA48); |
| |
| /* |
| * drive->addressing: |
| * 0: 28-bit |
| * 1: 48-bit |
| * 2: 48-bit capable doing 28-bit |
| */ |
| static int set_addressing(ide_drive_t *drive, int arg) |
| { |
| if (arg < 0 || arg > 2) |
| return -EINVAL; |
| |
| if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) || |
| ata_id_lba48_enabled(drive->id) == 0)) |
| return -EIO; |
| |
| if (arg == 2) |
| arg = 0; |
| |
| if (arg) |
| drive->dev_flags |= IDE_DFLAG_LBA48; |
| else |
| drive->dev_flags &= ~IDE_DFLAG_LBA48; |
| |
| return 0; |
| } |
| |
| ide_ext_devset_rw(acoustic, acoustic); |
| ide_ext_devset_rw(address, addressing); |
| ide_ext_devset_rw(multcount, multcount); |
| ide_ext_devset_rw(wcache, wcache); |
| |
| ide_ext_devset_rw_sync(nowerr, nowerr); |
| |
| static int ide_disk_check(ide_drive_t *drive, const char *s) |
| { |
| return 1; |
| } |
| |
| static void ide_disk_setup(ide_drive_t *drive) |
| { |
| struct ide_disk_obj *idkp = drive->driver_data; |
| struct request_queue *q = drive->queue; |
| ide_hwif_t *hwif = drive->hwif; |
| u16 *id = drive->id; |
| char *m = (char *)&id[ATA_ID_PROD]; |
| unsigned long long capacity; |
| |
| ide_proc_register_driver(drive, idkp->driver); |
| |
| if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) |
| return; |
| |
| if (drive->dev_flags & IDE_DFLAG_REMOVABLE) { |
| /* |
| * Removable disks (eg. SYQUEST); ignore 'WD' drives |
| */ |
| if (m[0] != 'W' || m[1] != 'D') |
| drive->dev_flags |= IDE_DFLAG_DOORLOCKING; |
| } |
| |
| (void)set_addressing(drive, 1); |
| |
| if (drive->dev_flags & IDE_DFLAG_LBA48) { |
| int max_s = 2048; |
| |
| if (max_s > hwif->rqsize) |
| max_s = hwif->rqsize; |
| |
| blk_queue_max_hw_sectors(q, max_s); |
| } |
| |
| printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name, |
| queue_max_sectors(q) / 2); |
| |
| if (ata_id_is_ssd(id)) { |
| blk_queue_flag_set(QUEUE_FLAG_NONROT, q); |
| blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q); |
| } |
| |
| /* calculate drive capacity, and select LBA if possible */ |
| ide_disk_get_capacity(drive); |
| |
| /* |
| * if possible, give fdisk access to more of the drive, |
| * by correcting bios_cyls: |
| */ |
| capacity = ide_gd_capacity(drive); |
| |
| if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) { |
| if (ata_id_lba48_enabled(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[ATA_ID_BUF_SIZE]) |
| printk(KERN_CONT " w/%dKiB Cache", id[ATA_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[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id)) |
| drive->dev_flags |= IDE_DFLAG_WCACHE; |
| |
| set_wcache(drive, 1); |
| |
| if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 && |
| (drive->head == 0 || drive->head > 16)) { |
| printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n", |
| drive->name, drive->head); |
| drive->dev_flags &= ~IDE_DFLAG_ATTACH; |
| } else |
| drive->dev_flags |= IDE_DFLAG_ATTACH; |
| } |
| |
| static void ide_disk_flush(ide_drive_t *drive) |
| { |
| if (ata_id_flush_enabled(drive->id) == 0 || |
| (drive->dev_flags & IDE_DFLAG_WCACHE) == 0) |
| return; |
| |
| if (do_idedisk_flushcache(drive)) |
| printk(KERN_INFO "%s: wcache flush failed!\n", drive->name); |
| } |
| |
| static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk) |
| { |
| return 0; |
| } |
| |
| static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk, |
| int on) |
| { |
| struct ide_cmd cmd; |
| int ret; |
| |
| if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) |
| return 0; |
| |
| memset(&cmd, 0, sizeof(cmd)); |
| cmd.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK; |
| cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; |
| cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; |
| |
| ret = ide_no_data_taskfile(drive, &cmd); |
| |
| if (ret) |
| drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; |
| |
| return ret; |
| } |
| |
| const struct ide_disk_ops ide_ata_disk_ops = { |
| .check = ide_disk_check, |
| .unlock_native_capacity = ide_disk_unlock_native_capacity, |
| .get_capacity = ide_disk_get_capacity, |
| .setup = ide_disk_setup, |
| .flush = ide_disk_flush, |
| .init_media = ide_disk_init_media, |
| .set_doorlock = ide_disk_set_doorlock, |
| .do_request = ide_do_rw_disk, |
| .ioctl = ide_disk_ioctl, |
| }; |