Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c728a9149f519cbb9f610962873f4e22ed4a6efd
Commit: c728a9149f519cbb9f610962873f4e22ed4a6efd
Parent: db6f8759d05d2082f09a45b5674edc0fb5e92b1b
Author: Tejun Heo <[EMAIL PROTECTED]>
AuthorDate: Mon Sep 3 12:32:30 2007 +0900
Committer: Jeff Garzik <[EMAIL PROTECTED]>
CommitDate: Fri Oct 12 14:55:39 2007 -0400
libata: clean up read/set native_max address functions
Merge ata_read_native_max_addres_ext() into ata_read_native_max_address()
and combine ata_set_native_max_address_ext() and
ata_set_native_max_address() into ata_set_max_sectors().
* reduce duplicate code
* return 0 or -errno depending on error conditions
* report if command fails
* use ATA_LBA instead of 0x40
This is in preparation of ata_hpa_resize() update.
Signed-off-by: Tejun Heo <[EMAIL PROTECTED]>
Signed-off-by: Jeff Garzik <[EMAIL PROTECTED]>
---
drivers/ata/libata-core.c | 174 ++++++++++++++++++++-------------------------
1 files changed, 77 insertions(+), 97 deletions(-)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index b33aea3..c7614bd 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -863,129 +863,113 @@ static u64 ata_tf_to_lba(struct ata_taskfile *tf)
}
/**
- * ata_read_native_max_address_ext - LBA48 native max query
- * @dev: Device to query
+ * ata_read_native_max_address - Read native max address
+ * @dev: target device
+ * @max_sectors: out parameter for the result native max address
*
- * Perform an LBA48 size query upon the device in question. Return the
- * actual LBA48 size or zero if the command fails.
- */
-
-static u64 ata_read_native_max_address_ext(struct ata_device *dev)
-{
- unsigned int err;
- struct ata_taskfile tf;
-
- ata_tf_init(dev, &tf);
-
- tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
- tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | ATA_TFLAG_ISADDR;
- tf.protocol |= ATA_PROT_NODATA;
- tf.device |= 0x40;
-
- err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
- if (err)
- return 0;
-
- return ata_tf_to_lba48(&tf);
-}
-
-/**
- * ata_read_native_max_address - LBA28 native max query
- * @dev: Device to query
+ * Perform an LBA48 or LBA28 native size query upon the device in
+ * question.
*
- * Performa an LBA28 size query upon the device in question. Return the
- * actual LBA28 size or zero if the command fails.
+ * RETURNS:
+ * 0 on success, -EACCES if command is aborted by the drive.
+ * -EIO on other errors.
*/
-
-static u64 ata_read_native_max_address(struct ata_device *dev)
+static int ata_read_native_max_address(struct ata_device *dev, u64
*max_sectors)
{
- unsigned int err;
+ unsigned int err_mask;
struct ata_taskfile tf;
+ int lba48 = ata_id_has_lba48(dev->id);
ata_tf_init(dev, &tf);
- tf.command = ATA_CMD_READ_NATIVE_MAX;
+ /* always clear all address registers */
tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
- tf.protocol |= ATA_PROT_NODATA;
- tf.device |= 0x40;
- err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
- if (err)
- return 0;
-
- return ata_tf_to_lba(&tf);
-}
-
-/**
- * ata_set_native_max_address_ext - LBA48 native max set
- * @dev: Device to query
- * @new_sectors: new max sectors value to set for the device
- *
- * Perform an LBA48 size set max upon the device in question. Return the
- * actual LBA48 size or zero if the command fails.
- */
-
-static u64 ata_set_native_max_address_ext(struct ata_device *dev, u64
new_sectors)
-{
- unsigned int err;
- struct ata_taskfile tf;
-
- new_sectors--;
-
- ata_tf_init(dev, &tf);
+ if (lba48) {
+ tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
+ tf.flags |= ATA_TFLAG_LBA48;
+ } else
+ tf.command = ATA_CMD_READ_NATIVE_MAX;
- tf.command = ATA_CMD_SET_MAX_EXT;
- tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | ATA_TFLAG_ISADDR;
tf.protocol |= ATA_PROT_NODATA;
- tf.device |= 0x40;
-
- tf.lbal = (new_sectors >> 0) & 0xff;
- tf.lbam = (new_sectors >> 8) & 0xff;
- tf.lbah = (new_sectors >> 16) & 0xff;
+ tf.device |= ATA_LBA;
- tf.hob_lbal = (new_sectors >> 24) & 0xff;
- tf.hob_lbam = (new_sectors >> 32) & 0xff;
- tf.hob_lbah = (new_sectors >> 40) & 0xff;
+ err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
+ if (err_mask) {
+ ata_dev_printk(dev, KERN_WARNING, "failed to read native "
+ "max address (err_mask=0x%x)\n", err_mask);
+ if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
+ return -EACCES;
+ return -EIO;
+ }
- err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
- if (err)
- return 0;
+ if (lba48)
+ *max_sectors = ata_tf_to_lba48(&tf);
+ else
+ *max_sectors = ata_tf_to_lba(&tf);
- return ata_tf_to_lba48(&tf);
+ return 0;
}
/**
- * ata_set_native_max_address - LBA28 native max set
- * @dev: Device to query
+ * ata_set_max_sectors - Set max sectors
+ * @dev: target device
* @new_sectors: new max sectors value to set for the device
+ * @res_sectors: result max sectors
*
- * Perform an LBA28 size set max upon the device in question. Return the
- * actual LBA28 size or zero if the command fails.
+ * Set max sectors of @dev to @new_sectors.
+ *
+ * RETURNS:
+ * 0 on success, -EACCES if command is aborted or denied (due to
+ * previous non-volatile SET_MAX) by the drive. -EIO on other
+ * errors.
*/
-
-static u64 ata_set_native_max_address(struct ata_device *dev, u64 new_sectors)
+static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors,
+ u64 *res_sectors)
{
- unsigned int err;
+ unsigned int err_mask;
struct ata_taskfile tf;
+ int lba48 = ata_id_has_lba48(dev->id);
new_sectors--;
ata_tf_init(dev, &tf);
- tf.command = ATA_CMD_SET_MAX;
tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
+
+ if (lba48) {
+ tf.command = ATA_CMD_SET_MAX_EXT;
+ tf.flags |= ATA_TFLAG_LBA48;
+
+ tf.hob_lbal = (new_sectors >> 24) & 0xff;
+ tf.hob_lbam = (new_sectors >> 32) & 0xff;
+ tf.hob_lbah = (new_sectors >> 40) & 0xff;
+ } else
+ tf.command = ATA_CMD_SET_MAX;
+
tf.protocol |= ATA_PROT_NODATA;
+ tf.device |= ATA_LBA;
tf.lbal = (new_sectors >> 0) & 0xff;
tf.lbam = (new_sectors >> 8) & 0xff;
tf.lbah = (new_sectors >> 16) & 0xff;
- tf.device |= ((new_sectors >> 24) & 0x0f) | 0x40;
- err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
- if (err)
- return 0;
+ err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
+ if (err_mask) {
+ ata_dev_printk(dev, KERN_WARNING, "failed to set "
+ "max address (err_mask=0x%x)\n", err_mask);
+ if (err_mask == AC_ERR_DEV &&
+ (tf.feature & (ATA_ABORTED | ATA_IDNF)))
+ return -EACCES;
+ return -EIO;
+ }
- return ata_tf_to_lba(&tf);
+ if (lba48)
+ *res_sectors = ata_tf_to_lba48(&tf);
+ else
+ *res_sectors = ata_tf_to_lba(&tf);
+
+ return 0;
}
/**
@@ -1001,11 +985,11 @@ static u64 ata_hpa_resize(struct ata_device *dev)
{
u64 sectors = dev->n_sectors;
u64 hpa_sectors;
+ int rc;
- if (ata_id_has_lba48(dev->id))
- hpa_sectors = ata_read_native_max_address_ext(dev);
- else
- hpa_sectors = ata_read_native_max_address(dev);
+ rc = ata_read_native_max_address(dev, &hpa_sectors);
+ if (rc)
+ return 0;
if (hpa_sectors > sectors) {
ata_dev_printk(dev, KERN_INFO,
@@ -1015,13 +999,9 @@ static u64 ata_hpa_resize(struct ata_device *dev)
(long long)sectors, (long long)hpa_sectors);
if (ata_ignore_hpa) {
- if (ata_id_has_lba48(dev->id))
- hpa_sectors =
ata_set_native_max_address_ext(dev, hpa_sectors);
- else
- hpa_sectors = ata_set_native_max_address(dev,
- hpa_sectors);
+ rc = ata_set_max_sectors(dev, hpa_sectors,
&hpa_sectors);
- if (hpa_sectors) {
+ if (rc == 0) {
ata_dev_printk(dev, KERN_INFO, "native size "
"increased to %lld sectors\n",
(long long)hpa_sectors);
-
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