From: Tejun Heo Date: Mon, 3 Sep 2007 03:32:30 +0000 (+0900) Subject: libata: clean up read/set native_max address functions X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c728a9149f519cbb9f610962873f4e22ed4a6efd;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git 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 Signed-off-by: Jeff Garzik --- diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index b33aea3638dc..c7614bdc0cb9 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);