/* * 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 <asm/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(rq->cmd_type != REQ_TYPE_FS); ledtrig_ide_activity(); pr_debug("%s: %sing: block=%llu, sectors=%u, buffer=0x%08lx\n", drive->name, rq_data_dir(rq) == READ ? "read" : "writ", (unsigned long long)block, blk_rq_sectors(rq), (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){ 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 (!(rq->cmd_flags & REQ_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_type = REQ_TYPE_ATA_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; int error; 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, READ, __GFP_WAIT); rq->cmd_type = REQ_TYPE_ATA_TASKFILE; drive->mult_req = arg; drive->special_flags |= IDE_SFLAG_SET_MULTMODE; error = 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;Lines 1–500 of 796. 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/* * 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 <asm/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(rq->cmd_type != REQ_TYPE_FS); ledtrig_ide_activity(); pr_debug("%s: %sing: block=%llu, sectors=%u, buffer=0x%08lx\n", drive->name, rq_data_dir(rq) == READ ? "read" : "writ", (unsigned long long)block, blk_rq_sectors(rq), (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) { 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 (!(rq->cmd_flags & REQ_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_type = REQ_TYPE_ATA_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; int error; 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, READ, __GFP_WAIT); rq->cmd_type = REQ_TYPE_ATA_TASKFILE; drive->mult_req = arg; drive->special_flags |= IDE_SFLAG_SET_MULTMODE; error = 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;