--- /dev/null
+/*
+ * 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\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 (!(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;
+ 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;
+ unsigned flush = 0;
+
+ 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) {
+ flush = REQ_FLUSH;
+ blk_queue_prep_rq(drive->queue, idedisk_prep_fn);
+ }
+ }
+
+ blk_queue_flush(drive->queue, flush);
+}
+
+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)) {
+ queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);
+ queue_flag_clear_unlocked(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,
+};
Code Review / kvmfornfv.git / blobdiff