| /* |
| * libata-core.c - helper library for ATA |
| * |
| * Maintained by: Jeff Garzik <jgarzik@pobox.com> |
| * Please ALWAYS copy linux-ide@vger.kernel.org |
| * on emails. |
| * |
| * Copyright 2003-2004 Red Hat, Inc. All rights reserved. |
| * Copyright 2003-2004 Jeff Garzik |
| * |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2, or (at your option) |
| * any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; see the file COPYING. If not, write to |
| * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| * |
| * |
| * libata documentation is available via 'make {ps|pdf}docs', |
| * as Documentation/DocBook/libata.* |
| * |
| * Hardware documentation available from http://www.t13.org/ and |
| * http://www.sata-io.org/ |
| * |
| * Standards documents from: |
| * http://www.t13.org (ATA standards, PCI DMA IDE spec) |
| * http://www.t10.org (SCSI MMC - for ATAPI MMC) |
| * http://www.sata-io.org (SATA) |
| * http://www.compactflash.org (CF) |
| * http://www.qic.org (QIC157 - Tape and DSC) |
| * http://www.ce-ata.org (CE-ATA: not supported) |
| * |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/pci.h> |
| #include <linux/init.h> |
| #include <linux/list.h> |
| #include <linux/mm.h> |
| #include <linux/spinlock.h> |
| #include <linux/blkdev.h> |
| #include <linux/delay.h> |
| #include <linux/timer.h> |
| #include <linux/interrupt.h> |
| #include <linux/completion.h> |
| #include <linux/suspend.h> |
| #include <linux/workqueue.h> |
| #include <linux/scatterlist.h> |
| #include <linux/io.h> |
| #include <linux/async.h> |
| #include <linux/log2.h> |
| #include <linux/slab.h> |
| #include <scsi/scsi.h> |
| #include <scsi/scsi_cmnd.h> |
| #include <scsi/scsi_host.h> |
| #include <linux/libata.h> |
| #include <asm/byteorder.h> |
| #include <linux/cdrom.h> |
| #include <linux/ratelimit.h> |
| |
| #include "libata.h" |
| |
| |
| /* debounce timing parameters in msecs { interval, duration, timeout } */ |
| const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; |
| const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; |
| const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; |
| |
| const struct ata_port_operations ata_base_port_ops = { |
| .prereset = ata_std_prereset, |
| .postreset = ata_std_postreset, |
| .error_handler = ata_std_error_handler, |
| }; |
| |
| const struct ata_port_operations sata_port_ops = { |
| .inherits = &ata_base_port_ops, |
| |
| .qc_defer = ata_std_qc_defer, |
| .hardreset = sata_std_hardreset, |
| }; |
| |
| static unsigned int ata_dev_init_params(struct ata_device *dev, |
| u16 heads, u16 sectors); |
| static unsigned int ata_dev_set_xfermode(struct ata_device *dev); |
| static unsigned int ata_dev_set_feature(struct ata_device *dev, |
| u8 enable, u8 feature); |
| static void ata_dev_xfermask(struct ata_device *dev); |
| static unsigned long ata_dev_blacklisted(const struct ata_device *dev); |
| |
| unsigned int ata_print_id = 1; |
| |
| struct workqueue_struct *ata_aux_wq; |
| |
| struct ata_force_param { |
| const char *name; |
| unsigned int cbl; |
| int spd_limit; |
| unsigned long xfer_mask; |
| unsigned int horkage_on; |
| unsigned int horkage_off; |
| unsigned int lflags; |
| }; |
| |
| struct ata_force_ent { |
| int port; |
| int device; |
| struct ata_force_param param; |
| }; |
| |
| static struct ata_force_ent *ata_force_tbl; |
| static int ata_force_tbl_size; |
| |
| static char ata_force_param_buf[PAGE_SIZE] __initdata; |
| /* param_buf is thrown away after initialization, disallow read */ |
| module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0); |
| MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)"); |
| |
| static int atapi_enabled = 1; |
| module_param(atapi_enabled, int, 0444); |
| MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])"); |
| |
| static int atapi_dmadir = 0; |
| module_param(atapi_dmadir, int, 0444); |
| MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)"); |
| |
| int atapi_passthru16 = 1; |
| module_param(atapi_passthru16, int, 0444); |
| MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])"); |
| |
| int libata_fua = 0; |
| module_param_named(fua, libata_fua, int, 0444); |
| MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)"); |
| |
| static int ata_ignore_hpa; |
| module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); |
| MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); |
| |
| static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA; |
| module_param_named(dma, libata_dma_mask, int, 0444); |
| MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)"); |
| |
| static int ata_probe_timeout; |
| module_param(ata_probe_timeout, int, 0444); |
| MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); |
| |
| int libata_noacpi = 0; |
| module_param_named(noacpi, libata_noacpi, int, 0444); |
| MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)"); |
| |
| int libata_allow_tpm = 0; |
| module_param_named(allow_tpm, libata_allow_tpm, int, 0444); |
| MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)"); |
| |
| static int atapi_an; |
| module_param(atapi_an, int, 0444); |
| MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)"); |
| |
| MODULE_AUTHOR("Jeff Garzik"); |
| MODULE_DESCRIPTION("Library module for ATA devices"); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(DRV_VERSION); |
| |
| |
| static bool ata_sstatus_online(u32 sstatus) |
| { |
| return (sstatus & 0xf) == 0x3; |
| } |
| |
| /** |
| * ata_link_next - link iteration helper |
| * @link: the previous link, NULL to start |
| * @ap: ATA port containing links to iterate |
| * @mode: iteration mode, one of ATA_LITER_* |
| * |
| * LOCKING: |
| * Host lock or EH context. |
| * |
| * RETURNS: |
| * Pointer to the next link. |
| */ |
| struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap, |
| enum ata_link_iter_mode mode) |
| { |
| BUG_ON(mode != ATA_LITER_EDGE && |
| mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST); |
| |
| /* NULL link indicates start of iteration */ |
| if (!link) |
| switch (mode) { |
| case ATA_LITER_EDGE: |
| case ATA_LITER_PMP_FIRST: |
| if (sata_pmp_attached(ap)) |
| return ap->pmp_link; |
| /* fall through */ |
| case ATA_LITER_HOST_FIRST: |
| return &ap->link; |
| } |
| |
| /* we just iterated over the host link, what's next? */ |
| if (link == &ap->link) |
| switch (mode) { |
| case ATA_LITER_HOST_FIRST: |
| if (sata_pmp_attached(ap)) |
| return ap->pmp_link; |
| /* fall through */ |
| case ATA_LITER_PMP_FIRST: |
| if (unlikely(ap->slave_link)) |
| return ap->slave_link; |
| /* fall through */ |
| case ATA_LITER_EDGE: |
| return NULL; |
| } |
| |
| /* slave_link excludes PMP */ |
| if (unlikely(link == ap->slave_link)) |
| return NULL; |
| |
| /* we were over a PMP link */ |
| if (++link < ap->pmp_link + ap->nr_pmp_links) |
| return link; |
| |
| if (mode == ATA_LITER_PMP_FIRST) |
| return &ap->link; |
| |
| return NULL; |
| } |
| |
| /** |
| * ata_dev_next - device iteration helper |
| * @dev: the previous device, NULL to start |
| * @link: ATA link containing devices to iterate |
| * @mode: iteration mode, one of ATA_DITER_* |
| * |
| * LOCKING: |
| * Host lock or EH context. |
| * |
| * RETURNS: |
| * Pointer to the next device. |
| */ |
| struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link, |
| enum ata_dev_iter_mode mode) |
| { |
| BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE && |
| mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE); |
| |
| /* NULL dev indicates start of iteration */ |
| if (!dev) |
| switch (mode) { |
| case ATA_DITER_ENABLED: |
| case ATA_DITER_ALL: |
| dev = link->device; |
| goto check; |
| case ATA_DITER_ENABLED_REVERSE: |
| case ATA_DITER_ALL_REVERSE: |
| dev = link->device + ata_link_max_devices(link) - 1; |
| goto check; |
| } |
| |
| next: |
| /* move to the next one */ |
| switch (mode) { |
| case ATA_DITER_ENABLED: |
| case ATA_DITER_ALL: |
| if (++dev < link->device + ata_link_max_devices(link)) |
| goto check; |
| return NULL; |
| case ATA_DITER_ENABLED_REVERSE: |
| case ATA_DITER_ALL_REVERSE: |
| if (--dev >= link->device) |
| goto check; |
| return NULL; |
| } |
| |
| check: |
| if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) && |
| !ata_dev_enabled(dev)) |
| goto next; |
| return dev; |
| } |
| |
| /** |
| * ata_dev_phys_link - find physical link for a device |
| * @dev: ATA device to look up physical link for |
| * |
| * Look up physical link which @dev is attached to. Note that |
| * this is different from @dev->link only when @dev is on slave |
| * link. For all other cases, it's the same as @dev->link. |
| * |
| * LOCKING: |
| * Don't care. |
| * |
| * RETURNS: |
| * Pointer to the found physical link. |
| */ |
| struct ata_link *ata_dev_phys_link(struct ata_device *dev) |
| { |
| struct ata_port *ap = dev->link->ap; |
| |
| if (!ap->slave_link) |
| return dev->link; |
| if (!dev->devno) |
| return &ap->link; |
| return ap->slave_link; |
| } |
| |
| /** |
| * ata_force_cbl - force cable type according to libata.force |
| * @ap: ATA port of interest |
| * |
| * Force cable type according to libata.force and whine about it. |
| * The last entry which has matching port number is used, so it |
| * can be specified as part of device force parameters. For |
| * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the |
| * same effect. |
| * |
| * LOCKING: |
| * EH context. |
| */ |
| void ata_force_cbl(struct ata_port *ap) |
| { |
| int i; |
| |
| for (i = ata_force_tbl_size - 1; i >= 0; i--) { |
| const struct ata_force_ent *fe = &ata_force_tbl[i]; |
| |
| if (fe->port != -1 && fe->port != ap->print_id) |
| continue; |
| |
| if (fe->param.cbl == ATA_CBL_NONE) |
| continue; |
| |
| ap->cbl = fe->param.cbl; |
| ata_port_printk(ap, KERN_NOTICE, |
| "FORCE: cable set to %s\n", fe->param.name); |
| return; |
| } |
| } |
| |
| /** |
| * ata_force_link_limits - force link limits according to libata.force |
| * @link: ATA link of interest |
| * |
| * Force link flags and SATA spd limit according to libata.force |
| * and whine about it. When only the port part is specified |
| * (e.g. 1:), the limit applies to all links connected to both |
| * the host link and all fan-out ports connected via PMP. If the |
| * device part is specified as 0 (e.g. 1.00:), it specifies the |
| * first fan-out link not the host link. Device number 15 always |
| * points to the host link whether PMP is attached or not. If the |
| * controller has slave link, device number 16 points to it. |
| * |
| * LOCKING: |
| * EH context. |
| */ |
| static void ata_force_link_limits(struct ata_link *link) |
| { |
| bool did_spd = false; |
| int linkno = link->pmp; |
| int i; |
| |
| if (ata_is_host_link(link)) |
| linkno += 15; |
| |
| for (i = ata_force_tbl_size - 1; i >= 0; i--) { |
| const struct ata_force_ent *fe = &ata_force_tbl[i]; |
| |
| if (fe->port != -1 && fe->port != link->ap->print_id) |
| continue; |
| |
| if (fe->device != -1 && fe->device != linkno) |
| continue; |
| |
| /* only honor the first spd limit */ |
| if (!did_spd && fe->param.spd_limit) { |
| link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1; |
| ata_link_printk(link, KERN_NOTICE, |
| "FORCE: PHY spd limit set to %s\n", |
| fe->param.name); |
| did_spd = true; |
| } |
| |
| /* let lflags stack */ |
| if (fe->param.lflags) { |
| link->flags |= fe->param.lflags; |
| ata_link_printk(link, KERN_NOTICE, |
| "FORCE: link flag 0x%x forced -> 0x%x\n", |
| fe->param.lflags, link->flags); |
| } |
| } |
| } |
| |
| /** |
| * ata_force_xfermask - force xfermask according to libata.force |
| * @dev: ATA device of interest |
| * |
| * Force xfer_mask according to libata.force and whine about it. |
| * For consistency with link selection, device number 15 selects |
| * the first device connected to the host link. |
| * |
| * LOCKING: |
| * EH context. |
| */ |
| static void ata_force_xfermask(struct ata_device *dev) |
| { |
| int devno = dev->link->pmp + dev->devno; |
| int alt_devno = devno; |
| int i; |
| |
| /* allow n.15/16 for devices attached to host port */ |
| if (ata_is_host_link(dev->link)) |
| alt_devno += 15; |
| |
| for (i = ata_force_tbl_size - 1; i >= 0; i--) { |
| const struct ata_force_ent *fe = &ata_force_tbl[i]; |
| unsigned long pio_mask, mwdma_mask, udma_mask; |
| |
| if (fe->port != -1 && fe->port != dev->link->ap->print_id) |
| continue; |
| |
| if (fe->device != -1 && fe->device != devno && |
| fe->device != alt_devno) |
| continue; |
| |
| if (!fe->param.xfer_mask) |
| continue; |
| |
| ata_unpack_xfermask(fe->param.xfer_mask, |
| &pio_mask, &mwdma_mask, &udma_mask); |
| if (udma_mask) |
| dev->udma_mask = udma_mask; |
| else if (mwdma_mask) { |
| dev->udma_mask = 0; |
| dev->mwdma_mask = mwdma_mask; |
| } else { |
| dev->udma_mask = 0; |
| dev->mwdma_mask = 0; |
| dev->pio_mask = pio_mask; |
| } |
| |
| ata_dev_printk(dev, KERN_NOTICE, |
| "FORCE: xfer_mask set to %s\n", fe->param.name); |
| return; |
| } |
| } |
| |
| /** |
| * ata_force_horkage - force horkage according to libata.force |
| * @dev: ATA device of interest |
| * |
| * Force horkage according to libata.force and whine about it. |
| * For consistency with link selection, device number 15 selects |
| * the first device connected to the host link. |
| * |
| * LOCKING: |
| * EH context. |
| */ |
| static void ata_force_horkage(struct ata_device *dev) |
| { |
| int devno = dev->link->pmp + dev->devno; |
| int alt_devno = devno; |
| int i; |
| |
| /* allow n.15/16 for devices attached to host port */ |
| if (ata_is_host_link(dev->link)) |
| alt_devno += 15; |
| |
| for (i = 0; i < ata_force_tbl_size; i++) { |
| const struct ata_force_ent *fe = &ata_force_tbl[i]; |
| |
| if (fe->port != -1 && fe->port != dev->link->ap->print_id) |
| continue; |
| |
| if (fe->device != -1 && fe->device != devno && |
| fe->device != alt_devno) |
| continue; |
| |
| if (!(~dev->horkage & fe->param.horkage_on) && |
| !(dev->horkage & fe->param.horkage_off)) |
| continue; |
| |
| dev->horkage |= fe->param.horkage_on; |
| dev->horkage &= ~fe->param.horkage_off; |
| |
| ata_dev_printk(dev, KERN_NOTICE, |
| "FORCE: horkage modified (%s)\n", fe->param.name); |
| } |
| } |
| |
| /** |
| * atapi_cmd_type - Determine ATAPI command type from SCSI opcode |
| * @opcode: SCSI opcode |
| * |
| * Determine ATAPI command type from @opcode. |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC} |
| */ |
| int atapi_cmd_type(u8 opcode) |
| { |
| switch (opcode) { |
| case GPCMD_READ_10: |
| case GPCMD_READ_12: |
| return ATAPI_READ; |
| |
| case GPCMD_WRITE_10: |
| case GPCMD_WRITE_12: |
| case GPCMD_WRITE_AND_VERIFY_10: |
| return ATAPI_WRITE; |
| |
| case GPCMD_READ_CD: |
| case GPCMD_READ_CD_MSF: |
| return ATAPI_READ_CD; |
| |
| case ATA_16: |
| case ATA_12: |
| if (atapi_passthru16) |
| return ATAPI_PASS_THRU; |
| /* fall thru */ |
| default: |
| return ATAPI_MISC; |
| } |
| } |
| |
| /** |
| * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure |
| * @tf: Taskfile to convert |
| * @pmp: Port multiplier port |
| * @is_cmd: This FIS is for command |
| * @fis: Buffer into which data will output |
| * |
| * Converts a standard ATA taskfile to a Serial ATA |
| * FIS structure (Register - Host to Device). |
| * |
| * LOCKING: |
| * Inherited from caller. |
| */ |
| void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis) |
| { |
| fis[0] = 0x27; /* Register - Host to Device FIS */ |
| fis[1] = pmp & 0xf; /* Port multiplier number*/ |
| if (is_cmd) |
| fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */ |
| |
| fis[2] = tf->command; |
| fis[3] = tf->feature; |
| |
| fis[4] = tf->lbal; |
| fis[5] = tf->lbam; |
| fis[6] = tf->lbah; |
| fis[7] = tf->device; |
| |
| fis[8] = tf->hob_lbal; |
| fis[9] = tf->hob_lbam; |
| fis[10] = tf->hob_lbah; |
| fis[11] = tf->hob_feature; |
| |
| fis[12] = tf->nsect; |
| fis[13] = tf->hob_nsect; |
| fis[14] = 0; |
| fis[15] = tf->ctl; |
| |
| fis[16] = 0; |
| fis[17] = 0; |
| fis[18] = 0; |
| fis[19] = 0; |
| } |
| |
| /** |
| * ata_tf_from_fis - Convert SATA FIS to ATA taskfile |
| * @fis: Buffer from which data will be input |
| * @tf: Taskfile to output |
| * |
| * Converts a serial ATA FIS structure to a standard ATA taskfile. |
| * |
| * LOCKING: |
| * Inherited from caller. |
| */ |
| |
| void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
| { |
| tf->command = fis[2]; /* status */ |
| tf->feature = fis[3]; /* error */ |
| |
| tf->lbal = fis[4]; |
| tf->lbam = fis[5]; |
| tf->lbah = fis[6]; |
| tf->device = fis[7]; |
| |
| tf->hob_lbal = fis[8]; |
| tf->hob_lbam = fis[9]; |
| tf->hob_lbah = fis[10]; |
| |
| tf->nsect = fis[12]; |
| tf->hob_nsect = fis[13]; |
| } |
| |
| static const u8 ata_rw_cmds[] = { |
| /* pio multi */ |
| ATA_CMD_READ_MULTI, |
| ATA_CMD_WRITE_MULTI, |
| ATA_CMD_READ_MULTI_EXT, |
| ATA_CMD_WRITE_MULTI_EXT, |
| 0, |
| 0, |
| 0, |
| ATA_CMD_WRITE_MULTI_FUA_EXT, |
| /* pio */ |
| ATA_CMD_PIO_READ, |
| ATA_CMD_PIO_WRITE, |
| ATA_CMD_PIO_READ_EXT, |
| ATA_CMD_PIO_WRITE_EXT, |
| 0, |
| 0, |
| 0, |
| 0, |
| /* dma */ |
| ATA_CMD_READ, |
| ATA_CMD_WRITE, |
| ATA_CMD_READ_EXT, |
| ATA_CMD_WRITE_EXT, |
| 0, |
| 0, |
| 0, |
| ATA_CMD_WRITE_FUA_EXT |
| }; |
| |
| /** |
| * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
| * @tf: command to examine and configure |
| * @dev: device tf belongs to |
| * |
| * Examine the device configuration and tf->flags to calculate |
| * the proper read/write commands and protocol to use. |
| * |
| * LOCKING: |
| * caller. |
| */ |
| static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) |
| { |
| u8 cmd; |
| |
| int index, fua, lba48, write; |
| |
| fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
| lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
| write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; |
| |
| if (dev->flags & ATA_DFLAG_PIO) { |
| tf->protocol = ATA_PROT_PIO; |
| index = dev->multi_count ? 0 : 8; |
| } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { |
| /* Unable to use DMA due to host limitation */ |
| tf->protocol = ATA_PROT_PIO; |
| index = dev->multi_count ? 0 : 8; |
| } else { |
| tf->protocol = ATA_PROT_DMA; |
| index = 16; |
| } |
| |
| cmd = ata_rw_cmds[index + fua + lba48 + write]; |
| if (cmd) { |
| tf->command = cmd; |
| return 0; |
| } |
| return -1; |
| } |
| |
| /** |
| * ata_tf_read_block - Read block address from ATA taskfile |
| * @tf: ATA taskfile of interest |
| * @dev: ATA device @tf belongs to |
| * |
| * LOCKING: |
| * None. |
| * |
| * Read block address from @tf. This function can handle all |
| * three address formats - LBA, LBA48 and CHS. tf->protocol and |
| * flags select the address format to use. |
| * |
| * RETURNS: |
| * Block address read from @tf. |
| */ |
| u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) |
| { |
| u64 block = 0; |
| |
| if (tf->flags & ATA_TFLAG_LBA) { |
| if (tf->flags & ATA_TFLAG_LBA48) { |
| block |= (u64)tf->hob_lbah << 40; |
| block |= (u64)tf->hob_lbam << 32; |
| block |= (u64)tf->hob_lbal << 24; |
| } else |
| block |= (tf->device & 0xf) << 24; |
| |
| block |= tf->lbah << 16; |
| block |= tf->lbam << 8; |
| block |= tf->lbal; |
| } else { |
| u32 cyl, head, sect; |
| |
| cyl = tf->lbam | (tf->lbah << 8); |
| head = tf->device & 0xf; |
| sect = tf->lbal; |
| |
| if (!sect) { |
| ata_dev_printk(dev, KERN_WARNING, "device reported " |
| "invalid CHS sector 0\n"); |
| sect = 1; /* oh well */ |
| } |
| |
| block = (cyl * dev->heads + head) * dev->sectors + sect - 1; |
| } |
| |
| return block; |
| } |
| |
| /** |
| * ata_build_rw_tf - Build ATA taskfile for given read/write request |
| * @tf: Target ATA taskfile |
| * @dev: ATA device @tf belongs to |
| * @block: Block address |
| * @n_block: Number of blocks |
| * @tf_flags: RW/FUA etc... |
| * @tag: tag |
| * |
| * LOCKING: |
| * None. |
| * |
| * Build ATA taskfile @tf for read/write request described by |
| * @block, @n_block, @tf_flags and @tag on @dev. |
| * |
| * RETURNS: |
| * |
| * 0 on success, -ERANGE if the request is too large for @dev, |
| * -EINVAL if the request is invalid. |
| */ |
| int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, |
| u64 block, u32 n_block, unsigned int tf_flags, |
| unsigned int tag) |
| { |
| tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| tf->flags |= tf_flags; |
| |
| if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { |
| /* yay, NCQ */ |
| if (!lba_48_ok(block, n_block)) |
| return -ERANGE; |
| |
| tf->protocol = ATA_PROT_NCQ; |
| tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; |
| |
| if (tf->flags & ATA_TFLAG_WRITE) |
| tf->command = ATA_CMD_FPDMA_WRITE; |
| else |
| tf->command = ATA_CMD_FPDMA_READ; |
| |
| tf->nsect = tag << 3; |
| tf->hob_feature = (n_block >> 8) & 0xff; |
| tf->feature = n_block & 0xff; |
| |
| tf->hob_lbah = (block >> 40) & 0xff; |
| tf->hob_lbam = (block >> 32) & 0xff; |
| tf->hob_lbal = (block >> 24) & 0xff; |
| tf->lbah = (block >> 16) & 0xff; |
| tf->lbam = (block >> 8) & 0xff; |
| tf->lbal = block & 0xff; |
| |
| tf->device = 1 << 6; |
| if (tf->flags & ATA_TFLAG_FUA) |
| tf->device |= 1 << 7; |
| } else if (dev->flags & ATA_DFLAG_LBA) { |
| tf->flags |= ATA_TFLAG_LBA; |
| |
| if (lba_28_ok(block, n_block)) { |
| /* use LBA28 */ |
| tf->device |= (block >> 24) & 0xf; |
| } else if (lba_48_ok(block, n_block)) { |
| if (!(dev->flags & ATA_DFLAG_LBA48)) |
| return -ERANGE; |
| |
| /* use LBA48 */ |
| tf->flags |= ATA_TFLAG_LBA48; |
| |
| tf->hob_nsect = (n_block >> 8) & 0xff; |
| |
| tf->hob_lbah = (block >> 40) & 0xff; |
| tf->hob_lbam = (block >> 32) & 0xff; |
| tf->hob_lbal = (block >> 24) & 0xff; |
| } else |
| /* request too large even for LBA48 */ |
| return -ERANGE; |
| |
| if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) |
| return -EINVAL; |
| |
| tf->nsect = n_block & 0xff; |
| |
| tf->lbah = (block >> 16) & 0xff; |
| tf->lbam = (block >> 8) & 0xff; |
| tf->lbal = block & 0xff; |
| |
| tf->device |= ATA_LBA; |
| } else { |
| /* CHS */ |
| u32 sect, head, cyl, track; |
| |
| /* The request -may- be too large for CHS addressing. */ |
| if (!lba_28_ok(block, n_block)) |
| return -ERANGE; |
| |
| if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) |
| return -EINVAL; |
| |
| /* Convert LBA to CHS */ |
| track = (u32)block / dev->sectors; |
| cyl = track / dev->heads; |
| head = track % dev->heads; |
| sect = (u32)block % dev->sectors + 1; |
| |
| DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
| (u32)block, track, cyl, head, sect); |
| |
| /* Check whether the converted CHS can fit. |
| Cylinder: 0-65535 |
| Head: 0-15 |
| Sector: 1-255*/ |
| if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
| return -ERANGE; |
| |
| tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ |
| tf->lbal = sect; |
| tf->lbam = cyl; |
| tf->lbah = cyl >> 8; |
| tf->device |= head; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask |
| * @pio_mask: pio_mask |
| * @mwdma_mask: mwdma_mask |
| * @udma_mask: udma_mask |
| * |
| * Pack @pio_mask, @mwdma_mask and @udma_mask into a single |
| * unsigned int xfer_mask. |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * Packed xfer_mask. |
| */ |
| unsigned long ata_pack_xfermask(unsigned long pio_mask, |
| unsigned long mwdma_mask, |
| unsigned long udma_mask) |
| { |
| return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | |
| ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | |
| ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); |
| } |
| |
| /** |
| * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks |
| * @xfer_mask: xfer_mask to unpack |
| * @pio_mask: resulting pio_mask |
| * @mwdma_mask: resulting mwdma_mask |
| * @udma_mask: resulting udma_mask |
| * |
| * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. |
| * Any NULL distination masks will be ignored. |
| */ |
| void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask, |
| unsigned long *mwdma_mask, unsigned long *udma_mask) |
| { |
| if (pio_mask) |
| *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; |
| if (mwdma_mask) |
| *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; |
| if (udma_mask) |
| *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; |
| } |
| |
| static const struct ata_xfer_ent { |
| int shift, bits; |
| u8 base; |
| } ata_xfer_tbl[] = { |
| { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 }, |
| { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 }, |
| { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 }, |
| { -1, }, |
| }; |
| |
| /** |
| * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask |
| * @xfer_mask: xfer_mask of interest |
| * |
| * Return matching XFER_* value for @xfer_mask. Only the highest |
| * bit of @xfer_mask is considered. |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * Matching XFER_* value, 0xff if no match found. |
| */ |
| u8 ata_xfer_mask2mode(unsigned long xfer_mask) |
| { |
| int highbit = fls(xfer_mask) - 1; |
| const struct ata_xfer_ent *ent; |
| |
| for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) |
| if (highbit >= ent->shift && highbit < ent->shift + ent->bits) |
| return ent->base + highbit - ent->shift; |
| return 0xff; |
| } |
| |
| /** |
| * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* |
| * @xfer_mode: XFER_* of interest |
| * |
| * Return matching xfer_mask for @xfer_mode. |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * Matching xfer_mask, 0 if no match found. |
| */ |
| unsigned long ata_xfer_mode2mask(u8 xfer_mode) |
| { |
| const struct ata_xfer_ent *ent; |
| |
| for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) |
| if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) |
| return ((2 << (ent->shift + xfer_mode - ent->base)) - 1) |
| & ~((1 << ent->shift) - 1); |
| return 0; |
| } |
| |
| /** |
| * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* |
| * @xfer_mode: XFER_* of interest |
| * |
| * Return matching xfer_shift for @xfer_mode. |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * Matching xfer_shift, -1 if no match found. |
| */ |
| int ata_xfer_mode2shift(unsigned long xfer_mode) |
| { |
| const struct ata_xfer_ent *ent; |
| |
| for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) |
| if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) |
| return ent->shift; |
| return -1; |
| } |
| |
| /** |
| * ata_mode_string - convert xfer_mask to string |
| * @xfer_mask: mask of bits supported; only highest bit counts. |
| * |
| * Determine string which represents the highest speed |
| * (highest bit in @modemask). |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * Constant C string representing highest speed listed in |
| * @mode_mask, or the constant C string "<n/a>". |
| */ |
| const char *ata_mode_string(unsigned long xfer_mask) |
| { |
| static const char * const xfer_mode_str[] = { |
| "PIO0", |
| "PIO1", |
| "PIO2", |
| "PIO3", |
| "PIO4", |
| "PIO5", |
| "PIO6", |
| "MWDMA0", |
| "MWDMA1", |
| "MWDMA2", |
| "MWDMA3", |
| "MWDMA4", |
| "UDMA/16", |
| "UDMA/25", |
| "UDMA/33", |
| "UDMA/44", |
| "UDMA/66", |
| "UDMA/100", |
| "UDMA/133", |
| "UDMA7", |
| }; |
| int highbit; |
| |
| highbit = fls(xfer_mask) - 1; |
| if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) |
| return xfer_mode_str[highbit]; |
| return "<n/a>"; |
| } |
| |
| static const char *sata_spd_string(unsigned int spd) |
| { |
| static const char * const spd_str[] = { |
| "1.5 Gbps", |
| "3.0 Gbps", |
| "6.0 Gbps", |
| }; |
| |
| if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) |
| return "<unknown>"; |
| return spd_str[spd - 1]; |
| } |
| |
| static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy) |
| { |
| struct ata_link *link = dev->link; |
| struct ata_port *ap = link->ap; |
| u32 scontrol; |
| unsigned int err_mask; |
| int rc; |
| |
| /* |
| * disallow DIPM for drivers which haven't set |
| * ATA_FLAG_IPM. This is because when DIPM is enabled, |
| * phy ready will be set in the interrupt status on |
| * state changes, which will cause some drivers to |
| * think there are errors - additionally drivers will |
| * need to disable hot plug. |
| */ |
| if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) { |
| ap->pm_policy = NOT_AVAILABLE; |
| return -EINVAL; |
| } |
| |
| /* |
| * For DIPM, we will only enable it for the |
| * min_power setting. |
| * |
| * Why? Because Disks are too stupid to know that |
| * If the host rejects a request to go to SLUMBER |
| * they should retry at PARTIAL, and instead it |
| * just would give up. So, for medium_power to |
| * work at all, we need to only allow HIPM. |
| */ |
| rc = sata_scr_read(link, SCR_CONTROL, &scontrol); |
| if (rc) |
| return rc; |
| |
| switch (policy) { |
| case MIN_POWER: |
| /* no restrictions on IPM transitions */ |
| scontrol &= ~(0x3 << 8); |
| rc = sata_scr_write(link, SCR_CONTROL, scontrol); |
| if (rc) |
| return rc; |
| |
| /* enable DIPM */ |
| if (dev->flags & ATA_DFLAG_DIPM) |
| err_mask = ata_dev_set_feature(dev, |
| SETFEATURES_SATA_ENABLE, SATA_DIPM); |
| break; |
| case MEDIUM_POWER: |
| /* allow IPM to PARTIAL */ |
| scontrol &= ~(0x1 << 8); |
| scontrol |= (0x2 << 8); |
| rc = sata_scr_write(link, SCR_CONTROL, scontrol); |
| if (rc) |
| return rc; |
| |
| /* |
| * we don't have to disable DIPM since IPM flags |
| * disallow transitions to SLUMBER, which effectively |
| * disable DIPM if it does not support PARTIAL |
| */ |
| break; |
| case NOT_AVAILABLE: |
| case MAX_PERFORMANCE: |
| /* disable all IPM transitions */ |
| scontrol |= (0x3 << 8); |
| rc = sata_scr_write(link, SCR_CONTROL, scontrol); |
| if (rc) |
| return rc; |
| |
| /* |
| * we don't have to disable DIPM since IPM flags |
| * disallow all transitions which effectively |
| * disable DIPM anyway. |
| */ |
| break; |
| } |
| |
| /* FIXME: handle SET FEATURES failure */ |
| (void) err_mask; |
| |
| return 0; |
| } |
| |
| /** |
| * ata_dev_enable_pm - enable SATA interface power management |
| * @dev: device to enable power management |
| * @policy: the link power management policy |
| * |
| * Enable SATA Interface power management. This will enable |
| * Device Interface Power Management (DIPM) for min_power |
| * policy, and then call driver specific callbacks for |
| * enabling Host Initiated Power management. |
| * |
| * Locking: Caller. |
| * Returns: -EINVAL if IPM is not supported, 0 otherwise. |
| */ |
| void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy) |
| { |
| int rc = 0; |
| struct ata_port *ap = dev->link->ap; |
| |
| /* set HIPM first, then DIPM */ |
| if (ap->ops->enable_pm) |
| rc = ap->ops->enable_pm(ap, policy); |
| if (rc) |
| goto enable_pm_out; |
| rc = ata_dev_set_dipm(dev, policy); |
| |
| enable_pm_out: |
| if (rc) |
| ap->pm_policy = MAX_PERFORMANCE; |
| else |
| ap->pm_policy = policy; |
| return /* rc */; /* hopefully we can use 'rc' eventually */ |
| } |
| |
| #ifdef CONFIG_PM |
| /** |
| * ata_dev_disable_pm - disable SATA interface power management |
| * @dev: device to disable power management |
| * |
| * Disable SATA Interface power management. This will disable |
| * Device Interface Power Management (DIPM) without changing |
| * policy, call driver specific callbacks for disabling Host |
| * Initiated Power management. |
| * |
| * Locking: Caller. |
| * Returns: void |
| */ |
| static void ata_dev_disable_pm(struct ata_device *dev) |
| { |
| struct ata_port *ap = dev->link->ap; |
| |
| ata_dev_set_dipm(dev, MAX_PERFORMANCE); |
| if (ap->ops->disable_pm) |
| ap->ops->disable_pm(ap); |
| } |
| #endif /* CONFIG_PM */ |
| |
| void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy) |
| { |
| ap->pm_policy = policy; |
| ap->link.eh_info.action |= ATA_EH_LPM; |
| ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY; |
| ata_port_schedule_eh(ap); |
| } |
| |
| #ifdef CONFIG_PM |
| static void ata_lpm_enable(struct ata_host *host) |
| { |
| struct ata_link *link; |
| struct ata_port *ap; |
| struct ata_device *dev; |
| int i; |
| |
| for (i = 0; i < host->n_ports; i++) { |
| ap = host->ports[i]; |
| ata_for_each_link(link, ap, EDGE) { |
| ata_for_each_dev(dev, link, ALL) |
| ata_dev_disable_pm(dev); |
| } |
| } |
| } |
| |
| static void ata_lpm_disable(struct ata_host *host) |
| { |
| int i; |
| |
| for (i = 0; i < host->n_ports; i++) { |
| struct ata_port *ap = host->ports[i]; |
| ata_lpm_schedule(ap, ap->pm_policy); |
| } |
| } |
| #endif /* CONFIG_PM */ |
| |
| /** |
| * ata_dev_classify - determine device type based on ATA-spec signature |
| * @tf: ATA taskfile register set for device to be identified |
| * |
| * Determine from taskfile register contents whether a device is |
| * ATA or ATAPI, as per "Signature and persistence" section |
| * of ATA/PI spec (volume 1, sect 5.14). |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or |
| * %ATA_DEV_UNKNOWN the event of failure. |
| */ |
| unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
| { |
| /* Apple's open source Darwin code hints that some devices only |
| * put a proper signature into the LBA mid/high registers, |
| * So, we only check those. It's sufficient for uniqueness. |
| * |
| * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate |
| * signatures for ATA and ATAPI devices attached on SerialATA, |
| * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA |
| * spec has never mentioned about using different signatures |
| * for ATA/ATAPI devices. Then, Serial ATA II: Port |
| * Multiplier specification began to use 0x69/0x96 to identify |
| * port multpliers and 0x3c/0xc3 to identify SEMB device. |
| * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and |
| * 0x69/0x96 shortly and described them as reserved for |
| * SerialATA. |
| * |
| * We follow the current spec and consider that 0x69/0x96 |
| * identifies a port multiplier and 0x3c/0xc3 a SEMB device. |
| * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports |
| * SEMB signature. This is worked around in |
| * ata_dev_read_id(). |
| */ |
| if ((tf->lbam == 0) && (tf->lbah == 0)) { |
| DPRINTK("found ATA device by sig\n"); |
| return ATA_DEV_ATA; |
| } |
| |
| if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) { |
| DPRINTK("found ATAPI device by sig\n"); |
| return ATA_DEV_ATAPI; |
| } |
| |
| if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) { |
| DPRINTK("found PMP device by sig\n"); |
| return ATA_DEV_PMP; |
| } |
| |
| if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) { |
| DPRINTK("found SEMB device by sig (could be ATA device)\n"); |
| return ATA_DEV_SEMB; |
| } |
| |
| DPRINTK("unknown device\n"); |
| return ATA_DEV_UNKNOWN; |
| } |
| |
| /** |
| * ata_id_string - Convert IDENTIFY DEVICE page into string |
| * @id: IDENTIFY DEVICE results we will examine |
| * @s: string into which data is output |
| * @ofs: offset into identify device page |
| * @len: length of string to return. must be an even number. |
| * |
| * The strings in the IDENTIFY DEVICE page are broken up into |
| * 16-bit chunks. Run through the string, and output each |
| * 8-bit chunk linearly, regardless of platform. |
| * |
| * LOCKING: |
| * caller. |
| */ |
| |
| void ata_id_string(const u16 *id, unsigned char *s, |
| unsigned int ofs, unsigned int len) |
| { |
| unsigned int c; |
| |
| BUG_ON(len & 1); |
| |
| while (len > 0) { |
| c = id[ofs] >> 8; |
| *s = c; |
| s++; |
| |
| c = id[ofs] & 0xff; |
| *s = c; |
| s++; |
| |
| ofs++; |
| len -= 2; |
| } |
| } |
| |
| /** |
| * ata_id_c_string - Convert IDENTIFY DEVICE page into C string |
| * @id: IDENTIFY DEVICE results we will examine |
| * @s: string into which data is output |
| * @ofs: offset into identify device page |
| * @len: length of string to return. must be an odd number. |
| * |
| * This function is identical to ata_id_string except that it |
| * trims trailing spaces and terminates the resulting string with |
| * null. @len must be actual maximum length (even number) + 1. |
| * |
| * LOCKING: |
| * caller. |
| */ |
| void ata_id_c_string(const u16 *id, unsigned char *s, |
| unsigned int ofs, unsigned int len) |
| { |
| unsigned char *p; |
| |
| ata_id_string(id, s, ofs, len - 1); |
| |
| p = s + strnlen(s, len - 1); |
| while (p > s && p[-1] == ' ') |
| p--; |
| *p = '\0'; |
| } |
| |
| static u64 ata_id_n_sectors(const u16 *id) |
| { |
| if (ata_id_has_lba(id)) { |
| if (ata_id_has_lba48(id)) |
| return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2); |
| else |
| return ata_id_u32(id, ATA_ID_LBA_CAPACITY); |
| } else { |
| if (ata_id_current_chs_valid(id)) |
| return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] * |
| id[ATA_ID_CUR_SECTORS]; |
| else |
| return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] * |
| id[ATA_ID_SECTORS]; |
| } |
| } |
| |
| u64 ata_tf_to_lba48(const struct ata_taskfile *tf) |
| { |
| u64 sectors = 0; |
| |
| sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; |
| sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; |
| sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24; |
| sectors |= (tf->lbah & 0xff) << 16; |
| sectors |= (tf->lbam & 0xff) << 8; |
| sectors |= (tf->lbal & 0xff); |
| |
| return sectors; |
| } |
| |
| u64 ata_tf_to_lba(const struct ata_taskfile *tf) |
| { |
| u64 sectors = 0; |
| |
| sectors |= (tf->device & 0x0f) << 24; |
| sectors |= (tf->lbah & 0xff) << 16; |
| sectors |= (tf->lbam & 0xff) << 8; |
| sectors |= (tf->lbal & 0xff); |
| |
| return sectors; |
| } |
| |
| /** |
| * 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 or LBA28 native size query upon the device in |
| * question. |
| * |
| * RETURNS: |
| * 0 on success, -EACCES if command is aborted by the drive. |
| * -EIO on other errors. |
| */ |
| static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors) |
| { |
| unsigned int err_mask; |
| struct ata_taskfile tf; |
| int lba48 = ata_id_has_lba48(dev->id); |
| |
| ata_tf_init(dev, &tf); |
| |
| /* always clear all address registers */ |
| tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
| |
| if (lba48) { |
| tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; |
| tf.flags |= ATA_TFLAG_LBA48; |
| } else |
| tf.command = ATA_CMD_READ_NATIVE_MAX; |
| |
| tf.protocol |= ATA_PROT_NODATA; |
| tf.device |= ATA_LBA; |
| |
| err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 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; |
| } |
| |
| if (lba48) |
| *max_sectors = ata_tf_to_lba48(&tf) + 1; |
| else |
| *max_sectors = ata_tf_to_lba(&tf) + 1; |
| if (dev->horkage & ATA_HORKAGE_HPA_SIZE) |
| (*max_sectors)--; |
| return 0; |
| } |
| |
| /** |
| * ata_set_max_sectors - Set max sectors |
| * @dev: target device |
| * @new_sectors: new max sectors value to set for the device |
| * |
| * 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 int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors) |
| { |
| unsigned int err_mask; |
| struct ata_taskfile tf; |
| int lba48 = ata_id_has_lba48(dev->id); |
| |
| new_sectors--; |
| |
| ata_tf_init(dev, &tf); |
| |
| 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.device |= (new_sectors >> 24) & 0xf; |
| } |
| |
| 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; |
| |
| err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 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 0; |
| } |
| |
| /** |
| * ata_hpa_resize - Resize a device with an HPA set |
| * @dev: Device to resize |
| * |
| * Read the size of an LBA28 or LBA48 disk with HPA features and resize |
| * it if required to the full size of the media. The caller must check |
| * the drive has the HPA feature set enabled. |
| * |
| * RETURNS: |
| * 0 on success, -errno on failure. |
| */ |
| static int ata_hpa_resize(struct ata_device *dev) |
| { |
| struct ata_eh_context *ehc = &dev->link->eh_context; |
| int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; |
| bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA; |
| u64 sectors = ata_id_n_sectors(dev->id); |
| u64 native_sectors; |
| int rc; |
| |
| /* do we need to do it? */ |
| if (dev->class != ATA_DEV_ATA || |
| !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || |
| (dev->horkage & ATA_HORKAGE_BROKEN_HPA)) |
| return 0; |
| |
| /* read native max address */ |
| rc = ata_read_native_max_address(dev, &native_sectors); |
| if (rc) { |
| /* If device aborted the command or HPA isn't going to |
| * be unlocked, skip HPA resizing. |
| */ |
| if (rc == -EACCES || !unlock_hpa) { |
| ata_dev_printk(dev, KERN_WARNING, "HPA support seems " |
| "broken, skipping HPA handling\n"); |
| dev->horkage |= ATA_HORKAGE_BROKEN_HPA; |
| |
| /* we can continue if device aborted the command */ |
| if (rc == -EACCES) |
| rc = 0; |
| } |
| |
| return rc; |
| } |
| dev->n_native_sectors = native_sectors; |
| |
| /* nothing to do? */ |
| if (native_sectors <= sectors || !unlock_hpa) { |
| if (!print_info || native_sectors == sectors) |
| return 0; |
| |
| if (native_sectors > sectors) |
| ata_dev_printk(dev, KERN_INFO, |
| "HPA detected: current %llu, native %llu\n", |
| (unsigned long long)sectors, |
| (unsigned long long)native_sectors); |
| else if (native_sectors < sectors) |
| ata_dev_printk(dev, KERN_WARNING, |
| "native sectors (%llu) is smaller than " |
| "sectors (%llu)\n", |
| (unsigned long long)native_sectors, |
| (unsigned long long)sectors); |
| return 0; |
| } |
| |
| /* let's unlock HPA */ |
| rc = ata_set_max_sectors(dev, native_sectors); |
| if (rc == -EACCES) { |
| /* if device aborted the command, skip HPA resizing */ |
| ata_dev_printk(dev, KERN_WARNING, "device aborted resize " |
| "(%llu -> %llu), skipping HPA handling\n", |
| (unsigned long long)sectors, |
| (unsigned long long)native_sectors); |
| dev->horkage |= ATA_HORKAGE_BROKEN_HPA; |
| return 0; |
| } else if (rc) |
| return rc; |
| |
| /* re-read IDENTIFY data */ |
| rc = ata_dev_reread_id(dev, 0); |
| if (rc) { |
| ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY " |
| "data after HPA resizing\n"); |
| return rc; |
| } |
| |
| if (print_info) { |
| u64 new_sectors = ata_id_n_sectors(dev->id); |
| ata_dev_printk(dev, KERN_INFO, |
| "HPA unlocked: %llu -> %llu, native %llu\n", |
| (unsigned long long)sectors, |
| (unsigned long long)new_sectors, |
| (unsigned long long)native_sectors); |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * ata_dump_id - IDENTIFY DEVICE info debugging output |
| * @id: IDENTIFY DEVICE page to dump |
| * |
| * Dump selected 16-bit words from the given IDENTIFY DEVICE |
| * page. |
| * |
| * LOCKING: |
| * caller. |
| */ |
| |
| static inline void ata_dump_id(const u16 *id) |
| { |
| DPRINTK("49==0x%04x " |
| "53==0x%04x " |
| "63==0x%04x " |
| "64==0x%04x " |
| "75==0x%04x \n", |
| id[49], |
| id[53], |
| id[63], |
| id[64], |
| id[75]); |
| DPRINTK("80==0x%04x " |
| "81==0x%04x " |
| "82==0x%04x " |
| "83==0x%04x " |
| "84==0x%04x \n", |
| id[80], |
| id[81], |
| id[82], |
| id[83], |
| id[84]); |
| DPRINTK("88==0x%04x " |
| "93==0x%04x\n", |
| id[88], |
| id[93]); |
| } |
| |
| /** |
| * ata_id_xfermask - Compute xfermask from the given IDENTIFY data |
| * @id: IDENTIFY data to compute xfer mask from |
| * |
| * Compute the xfermask for this device. This is not as trivial |
| * as it seems if we must consider early devices correctly. |
| * |
| * FIXME: pre IDE drive timing (do we care ?). |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * Computed xfermask |
| */ |
| unsigned long ata_id_xfermask(const u16 *id) |
| { |
| unsigned long pio_mask, mwdma_mask, udma_mask; |
| |
| /* Usual case. Word 53 indicates word 64 is valid */ |
| if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { |
| pio_mask = id[ATA_ID_PIO_MODES] & 0x03; |
| pio_mask <<= 3; |
| pio_mask |= 0x7; |
| } else { |
| /* If word 64 isn't valid then Word 51 high byte holds |
| * the PIO timing number for the maximum. Turn it into |
| * a mask. |
| */ |
| u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; |
| if (mode < 5) /* Valid PIO range */ |
| pio_mask = (2 << mode) - 1; |
| else |
| pio_mask = 1; |
| |
| /* But wait.. there's more. Design your standards by |
| * committee and you too can get a free iordy field to |
| * process. However its the speeds not the modes that |
| * are supported... Note drivers using the timing API |
| * will get this right anyway |
| */ |
| } |
| |
| mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; |
| |
| if (ata_id_is_cfa(id)) { |
| /* |
| * Process compact flash extended modes |
| */ |
| int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7; |
| int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7; |
| |
| if (pio) |
| pio_mask |= (1 << 5); |
| if (pio > 1) |
| pio_mask |= (1 << 6); |
| if (dma) |
| mwdma_mask |= (1 << 3); |
| if (dma > 1) |
| mwdma_mask |= (1 << 4); |
| } |
| |
| udma_mask = 0; |
| if (id[ATA_ID_FIELD_VALID] & (1 << 2)) |
| udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; |
| |
| return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); |
| } |
| |
| static void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
| { |
| struct completion *waiting = qc->private_data; |
| |
| complete(waiting); |
| } |
| |
| /** |
| * ata_exec_internal_sg - execute libata internal command |
| * @dev: Device to which the command is sent |
| * @tf: Taskfile registers for the command and the result |
| * @cdb: CDB for packet command |
| * @dma_dir: Data tranfer direction of the command |
| * @sgl: sg list for the data buffer of the command |
| * @n_elem: Number of sg entries |
| * @timeout: Timeout in msecs (0 for default) |
| * |
| * Executes libata internal command with timeout. @tf contains |
| * command on entry and result on return. Timeout and error |
| * conditions are reported via return value. No recovery action |
| * is taken after a command times out. It's caller's duty to |
| * clean up after timeout. |
| * |
| * LOCKING: |
| * None. Should be called with kernel context, might sleep. |
| * |
| * RETURNS: |
| * Zero on success, AC_ERR_* mask on failure |
| */ |
| unsigned ata_exec_internal_sg(struct ata_device *dev, |
| struct ata_taskfile *tf, const u8 *cdb, |
| int dma_dir, struct scatterlist *sgl, |
| unsigned int n_elem, unsigned long timeout) |
| { |
| struct ata_link *link = dev->link; |
| struct ata_port *ap = link->ap; |
| u8 command = tf->command; |
| int auto_timeout = 0; |
| struct ata_queued_cmd *qc; |
| unsigned int tag, preempted_tag; |
| u32 preempted_sactive, preempted_qc_active; |
| int preempted_nr_active_links; |
| DECLARE_COMPLETION_ONSTACK(wait); |
| unsigned long flags; |
| unsigned int err_mask; |
| int rc; |
| |
| spin_lock_irqsave(ap->lock, flags); |
| |
| /* no internal command while frozen */ |
| if (ap->pflags & ATA_PFLAG_FROZEN) { |
| spin_unlock_irqrestore(ap->lock, flags); |
| return AC_ERR_SYSTEM; |
| } |
| |
| /* initialize internal qc */ |
| |
| /* XXX: Tag 0 is used for drivers with legacy EH as some |
| * drivers choke if any other tag is given. This breaks |
| * ata_tag_internal() test for those drivers. Don't use new |
| * EH stuff without converting to it. |
| */ |
| if (ap->ops->error_handler) |
| tag = ATA_TAG_INTERNAL; |
| else |
| tag = 0; |
| |
| if (test_and_set_bit(tag, &ap->qc_allocated)) |
| BUG(); |
| qc = __ata_qc_from_tag(ap, tag); |
| |
| qc->tag = tag; |
| qc->scsicmd = NULL; |
| qc->ap = ap; |
| qc->dev = dev; |
| ata_qc_reinit(qc); |
| |
| preempted_tag = link->active_tag; |
| preempted_sactive = link->sactive; |
| preempted_qc_active = ap->qc_active; |
| preempted_nr_active_links = ap->nr_active_links; |
| link->active_tag = ATA_TAG_POISON; |
| link->sactive = 0; |
| ap->qc_active = 0; |
| ap->nr_active_links = 0; |
| |
| /* prepare & issue qc */ |
| qc->tf = *tf; |
| if (cdb) |
| memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); |
| qc->flags |= ATA_QCFLAG_RESULT_TF; |
| qc->dma_dir = dma_dir; |
| if (dma_dir != DMA_NONE) { |
| unsigned int i, buflen = 0; |
| struct scatterlist *sg; |
| |
| for_each_sg(sgl, sg, n_elem, i) |
| buflen += sg->length; |
| |
| ata_sg_init(qc, sgl, n_elem); |
| qc->nbytes = buflen; |
| } |
| |
| qc->private_data = &wait; |
| qc->complete_fn = ata_qc_complete_internal; |
| |
| ata_qc_issue(qc); |
| |
| spin_unlock_irqrestore(ap->lock, flags); |
| |
| if (!timeout) { |
| if (ata_probe_timeout) |
| timeout = ata_probe_timeout * 1000; |
| else { |
| timeout = ata_internal_cmd_timeout(dev, command); |
| auto_timeout = 1; |
| } |
| } |
| |
| rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout)); |
| |
| ata_sff_flush_pio_task(ap); |
| |
| if (!rc) { |
| spin_lock_irqsave(ap->lock, flags); |
| |
| /* We're racing with irq here. If we lose, the |
| * following test prevents us from completing the qc |
| * twice. If we win, the port is frozen and will be |
| * cleaned up by ->post_internal_cmd(). |
| */ |
| if (qc->flags & ATA_QCFLAG_ACTIVE) { |
| qc->err_mask |= AC_ERR_TIMEOUT; |
| |
| if (ap->ops->error_handler) |
| ata_port_freeze(ap); |
| else |
| ata_qc_complete(qc); |
| |
| if (ata_msg_warn(ap)) |
| ata_dev_printk(dev, KERN_WARNING, |
| "qc timeout (cmd 0x%x)\n", command); |
| } |
| |
| spin_unlock_irqrestore(ap->lock, flags); |
| } |
| |
| /* do post_internal_cmd */ |
| if (ap->ops->post_internal_cmd) |
| ap->ops->post_internal_cmd(qc); |
| |
| /* perform minimal error analysis */ |
| if (qc->flags & ATA_QCFLAG_FAILED) { |
| if (qc->result_tf.command & (ATA_ERR | ATA_DF)) |
| qc->err_mask |= AC_ERR_DEV; |
| |
| if (!qc->err_mask) |
| qc->err_mask |= AC_ERR_OTHER; |
| |
| if (qc->err_mask & ~AC_ERR_OTHER) |
| qc->err_mask &= ~AC_ERR_OTHER; |
| } |
| |
| /* finish up */ |
| spin_lock_irqsave(ap->lock, flags); |
| |
| *tf = qc->result_tf; |
| err_mask = qc->err_mask; |
| |
| ata_qc_free(qc); |
| link->active_tag = preempted_tag; |
| link->sactive = preempted_sactive; |
| ap->qc_active = preempted_qc_active; |
| ap->nr_active_links = preempted_nr_active_links; |
| |
| spin_unlock_irqrestore(ap->lock, flags); |
| |
| if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout) |
| ata_internal_cmd_timed_out(dev, command); |
| |
| return err_mask; |
| } |
| |
| /** |
| * ata_exec_internal - execute libata internal command |
| * @dev: Device to which the command is sent |
| * @tf: Taskfile registers for the command and the result |
| * @cdb: CDB for packet command |
| * @dma_dir: Data tranfer direction of the command |
| * @buf: Data buffer of the command |
| * @buflen: Length of data buffer |
| * @timeout: Timeout in msecs (0 for default) |
| * |
| * Wrapper around ata_exec_internal_sg() which takes simple |
| * buffer instead of sg list. |
| * |
| * LOCKING: |
| * None. Should be called with kernel context, might sleep. |
| * |
| * RETURNS: |
| * Zero on success, AC_ERR_* mask on failure |
| */ |
| unsigned ata_exec_internal(struct ata_device *dev, |
| struct ata_taskfile *tf, const u8 *cdb, |
| int dma_dir, void *buf, unsigned int buflen, |
| unsigned long timeout) |
| { |
| struct scatterlist *psg = NULL, sg; |
| unsigned int n_elem = 0; |
| |
| if (dma_dir != DMA_NONE) { |
| WARN_ON(!buf); |
| sg_init_one(&sg, buf, buflen); |
| psg = &sg; |
| n_elem++; |
| } |
| |
| return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem, |
| timeout); |
| } |
| |
| /** |
| * ata_do_simple_cmd - execute simple internal command |
| * @dev: Device to which the command is sent |
| * @cmd: Opcode to execute |
| * |
| * Execute a 'simple' command, that only consists of the opcode |
| * 'cmd' itself, without filling any other registers |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep). |
| * |
| * RETURNS: |
| * Zero on success, AC_ERR_* mask on failure |
| */ |
| unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) |
| { |
| struct ata_taskfile tf; |
| |
| ata_tf_init(dev, &tf); |
| |
| tf.command = cmd; |
| tf.flags |= ATA_TFLAG_DEVICE; |
| tf.protocol = ATA_PROT_NODATA; |
| |
| return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
| } |
| |
| /** |
| * ata_pio_need_iordy - check if iordy needed |
| * @adev: ATA device |
| * |
| * Check if the current speed of the device requires IORDY. Used |
| * by various controllers for chip configuration. |
| */ |
| unsigned int ata_pio_need_iordy(const struct ata_device *adev) |
| { |
| /* Don't set IORDY if we're preparing for reset. IORDY may |
| * lead to controller lock up on certain controllers if the |
| * port is not occupied. See bko#11703 for details. |
| */ |
| if (adev->link->ap->pflags & ATA_PFLAG_RESETTING) |
| return 0; |
| /* Controller doesn't support IORDY. Probably a pointless |
| * check as the caller should know this. |
| */ |
| if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) |
| return 0; |
| /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */ |
| if (ata_id_is_cfa(adev->id) |
| && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6)) |
| return 0; |
| /* PIO3 and higher it is mandatory */ |
| if (adev->pio_mode > XFER_PIO_2) |
| return 1; |
| /* We turn it on when possible */ |
| if (ata_id_has_iordy(adev->id)) |
| return 1; |
| return 0; |
| } |
| |
| /** |
| * ata_pio_mask_no_iordy - Return the non IORDY mask |
| * @adev: ATA device |
| * |
| * Compute the highest mode possible if we are not using iordy. Return |
| * -1 if no iordy mode is available. |
| */ |
| static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) |
| { |
| /* If we have no drive specific rule, then PIO 2 is non IORDY */ |
| if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ |
| u16 pio = adev->id[ATA_ID_EIDE_PIO]; |
| /* Is the speed faster than the drive allows non IORDY ? */ |
| if (pio) { |
| /* This is cycle times not frequency - watch the logic! */ |
| if (pio > 240) /* PIO2 is 240nS per cycle */ |
| return 3 << ATA_SHIFT_PIO; |
| return 7 << ATA_SHIFT_PIO; |
| } |
| } |
| return 3 << ATA_SHIFT_PIO; |
| } |
| |
| /** |
| * ata_do_dev_read_id - default ID read method |
| * @dev: device |
| * @tf: proposed taskfile |
| * @id: data buffer |
| * |
| * Issue the identify taskfile and hand back the buffer containing |
| * identify data. For some RAID controllers and for pre ATA devices |
| * this function is wrapped or replaced by the driver |
| */ |
| unsigned int ata_do_dev_read_id(struct ata_device *dev, |
| struct ata_taskfile *tf, u16 *id) |
| { |
| return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE, |
| id, sizeof(id[0]) * ATA_ID_WORDS, 0); |
| } |
| |
| /** |
| * ata_dev_read_id - Read ID data from the specified device |
| * @dev: target device |
| * @p_class: pointer to class of the target device (may be changed) |
| * @flags: ATA_READID_* flags |
| * @id: buffer to read IDENTIFY data into |
| * |
| * Read ID data from the specified device. ATA_CMD_ID_ATA is |
| * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI |
| * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS |
| * for pre-ATA4 drives. |
| * |
| * FIXME: ATA_CMD_ID_ATA is optional for early drives and right |
| * now we abort if we hit that case. |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep) |
| * |
| * RETURNS: |
| * 0 on success, -errno otherwise. |
| */ |
| int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, |
| unsigned int flags, u16 *id) |
| { |
| struct ata_port *ap = dev->link->ap; |
| unsigned int class = *p_class; |
| struct ata_taskfile tf; |
| unsigned int err_mask = 0; |
| const char *reason; |
| bool is_semb = class == ATA_DEV_SEMB; |
| int may_fallback = 1, tried_spinup = 0; |
| int rc; |
| |
| if (ata_msg_ctl(ap)) |
| ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__); |
| |
| retry: |
| ata_tf_init(dev, &tf); |
| |
| switch (class) { |
| case ATA_DEV_SEMB: |
| class = ATA_DEV_ATA; /* some hard drives report SEMB sig */ |
| case ATA_DEV_ATA: |
| tf.command = ATA_CMD_ID_ATA; |
| break; |
| case ATA_DEV_ATAPI: |
| tf.command = ATA_CMD_ID_ATAPI; |
| break; |
| default: |
| rc = -ENODEV; |
| reason = "unsupported class"; |
| goto err_out; |
| } |
| |
| tf.protocol = ATA_PROT_PIO; |
| |
| /* Some devices choke if TF registers contain garbage. Make |
| * sure those are properly initialized. |
| */ |
| tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| |
| /* Device presence detection is unreliable on some |
| * controllers. Always poll IDENTIFY if available. |
| */ |
| tf.flags |= ATA_TFLAG_POLLING; |
| |
| if (ap->ops->read_id) |
| err_mask = ap->ops->read_id(dev, &tf, id); |
| else |
| err_mask = ata_do_dev_read_id(dev, &tf, id); |
| |
| if (err_mask) { |
| if (err_mask & AC_ERR_NODEV_HINT) { |
| ata_dev_printk(dev, KERN_DEBUG, |
| "NODEV after polling detection\n"); |
| return -ENOENT; |
| } |
| |
| if (is_semb) { |
| ata_dev_printk(dev, KERN_INFO, "IDENTIFY failed on " |
| "device w/ SEMB sig, disabled\n"); |
| /* SEMB is not supported yet */ |
| *p_class = ATA_DEV_SEMB_UNSUP; |
| return 0; |
| } |
| |
| if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { |
| /* Device or controller might have reported |
| * the wrong device class. Give a shot at the |
| * other IDENTIFY if the current one is |
| * aborted by the device. |
| */ |
| if (may_fallback) { |
| may_fallback = 0; |
| |
| if (class == ATA_DEV_ATA) |
| class = ATA_DEV_ATAPI; |
| else |
| class = ATA_DEV_ATA; |
| goto retry; |
| } |
| |
| /* Control reaches here iff the device aborted |
| * both flavors of IDENTIFYs which happens |
| * sometimes with phantom devices. |
| */ |
| ata_dev_printk(dev, KERN_DEBUG, |
| "both IDENTIFYs aborted, assuming NODEV\n"); |
| return -ENOENT; |
| } |
| |
| rc = -EIO; |
| reason = "I/O error"; |
| goto err_out; |
| } |
| |
| if (dev->horkage & ATA_HORKAGE_DUMP_ID) { |
| ata_dev_printk(dev, KERN_DEBUG, "dumping IDENTIFY data, " |
| "class=%d may_fallback=%d tried_spinup=%d\n", |
| class, may_fallback, tried_spinup); |
| print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, |
| 16, 2, id, ATA_ID_WORDS * sizeof(*id), true); |
| } |
| |
| /* Falling back doesn't make sense if ID data was read |
| * successfully at least once. |
| */ |
| may_fallback = 0; |
| |
| swap_buf_le16(id, ATA_ID_WORDS); |
| |
| /* sanity check */ |
| rc = -EINVAL; |
| reason = "device reports invalid type"; |
| |
| if (class == ATA_DEV_ATA) { |
| if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) |
| goto err_out; |
| } else { |
| if (ata_id_is_ata(id)) |
| goto err_out; |
| } |
| |
| if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { |
| tried_spinup = 1; |
| /* |
| * Drive powered-up in standby mode, and requires a specific |
| * SET_FEATURES spin-up subcommand before it will accept |
| * anything other than the original IDENTIFY command. |
| */ |
| err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0); |
| if (err_mask && id[2] != 0x738c) { |
| rc = -EIO; |
| reason = "SPINUP failed"; |
| goto err_out; |
| } |
| /* |
| * If the drive initially returned incomplete IDENTIFY info, |
| * we now must reissue the IDENTIFY command. |
| */ |
| if (id[2] == 0x37c8) |
| goto retry; |
| } |
| |
| if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { |
| /* |
| * The exact sequence expected by certain pre-ATA4 drives is: |
| * SRST RESET |
| * IDENTIFY (optional in early ATA) |
| * INITIALIZE DEVICE PARAMETERS (later IDE and ATA) |
| * anything else.. |
| * Some drives were very specific about that exact sequence. |
| * |
| * Note that ATA4 says lba is mandatory so the second check |
| * should never trigger. |
| */ |
| if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { |
| err_mask = ata_dev_init_params(dev, id[3], id[6]); |
| if (err_mask) { |
| rc = -EIO; |
| reason = "INIT_DEV_PARAMS failed"; |
| goto err_out; |
| } |
| |
| /* current CHS translation info (id[53-58]) might be |
| * changed. reread the identify device info. |
| */ |
| flags &= ~ATA_READID_POSTRESET; |
| goto retry; |
| } |
| } |
| |
| *p_class = class; |
| |
| return 0; |
| |
| err_out: |
| if (ata_msg_warn(ap)) |
| ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " |
| "(%s, err_mask=0x%x)\n", reason, err_mask); |
| return rc; |
| } |
| |
| static int ata_do_link_spd_horkage(struct ata_device *dev) |
| { |
| struct ata_link *plink = ata_dev_phys_link(dev); |
| u32 target, target_limit; |
| |
| if (!sata_scr_valid(plink)) |
| return 0; |
| |
| if (dev->horkage & ATA_HORKAGE_1_5_GBPS) |
| target = 1; |
| else |
| return 0; |
| |
| target_limit = (1 << target) - 1; |
| |
| /* if already on stricter limit, no need to push further */ |
| if (plink->sata_spd_limit <= target_limit) |
| return 0; |
| |
| plink->sata_spd_limit = target_limit; |
| |
| /* Request another EH round by returning -EAGAIN if link is |
| * going faster than the target speed. Forward progress is |
| * guaranteed by setting sata_spd_limit to target_limit above. |
| */ |
| if (plink->sata_spd > target) { |
| ata_dev_printk(dev, KERN_INFO, |
| "applying link speed limit horkage to %s\n", |
| sata_spd_string(target)); |
| return -EAGAIN; |
| } |
| return 0; |
| } |
| |
| static inline u8 ata_dev_knobble(struct ata_device *dev) |
| { |
| struct ata_port *ap = dev->link->ap; |
| |
| if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK) |
| return 0; |
| |
| return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); |
| } |
| |
| static int ata_dev_config_ncq(struct ata_device *dev, |
| char *desc, size_t desc_sz) |
| { |
| struct ata_port *ap = dev->link->ap; |
| int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); |
| unsigned int err_mask; |
| char *aa_desc = ""; |
| |
| if (!ata_id_has_ncq(dev->id)) { |
| desc[0] = '\0'; |
| return 0; |
| } |
| if (dev->horkage & ATA_HORKAGE_NONCQ) { |
| snprintf(desc, desc_sz, "NCQ (not used)"); |
| return 0; |
| } |
| if (ap->flags & ATA_FLAG_NCQ) { |
| hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); |
| dev->flags |= ATA_DFLAG_NCQ; |
| } |
| |
| if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) && |
| (ap->flags & ATA_FLAG_FPDMA_AA) && |
| ata_id_has_fpdma_aa(dev->id)) { |
| err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE, |
| SATA_FPDMA_AA); |
| if (err_mask) { |
| ata_dev_printk(dev, KERN_ERR, "failed to enable AA" |
| "(error_mask=0x%x)\n", err_mask); |
| if (err_mask != AC_ERR_DEV) { |
| dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA; |
| return -EIO; |
| } |
| } else |
| aa_desc = ", AA"; |
| } |
| |
| if (hdepth >= ddepth) |
| snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc); |
| else |
| snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth, |
| ddepth, aa_desc); |
| return 0; |
| } |
| |
| /** |
| * ata_dev_configure - Configure the specified ATA/ATAPI device |
| * @dev: Target device to configure |
| * |
| * Configure @dev according to @dev->id. Generic and low-level |
| * driver specific fixups are also applied. |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep) |
| * |
| * RETURNS: |
| * 0 on success, -errno otherwise |
| */ |
| int ata_dev_configure(struct ata_device *dev) |
| { |
| struct ata_port *ap = dev->link->ap; |
| struct ata_eh_context *ehc = &dev->link->eh_context; |
| int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; |
| const u16 *id = dev->id; |
| unsigned long xfer_mask; |
| char revbuf[7]; /* XYZ-99\0 */ |
| char fwrevbuf[ATA_ID_FW_REV_LEN+1]; |
| char modelbuf[ATA_ID_PROD_LEN+1]; |
| int rc; |
| |
| if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { |
| ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", |
| __func__); |
| return 0; |
| } |
| |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__); |
| |
| /* set horkage */ |
| dev->horkage |= ata_dev_blacklisted(dev); |
| ata_force_horkage(dev); |
| |
| if (dev->horkage & ATA_HORKAGE_DISABLE) { |
| ata_dev_printk(dev, KERN_INFO, |
| "unsupported device, disabling\n"); |
| ata_dev_disable(dev); |
| return 0; |
| } |
| |
| if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) && |
| dev->class == ATA_DEV_ATAPI) { |
| ata_dev_printk(dev, KERN_WARNING, |
| "WARNING: ATAPI is %s, device ignored.\n", |
| atapi_enabled ? "not supported with this driver" |
| : "disabled"); |
| ata_dev_disable(dev); |
| return 0; |
| } |
| |
| rc = ata_do_link_spd_horkage(dev); |
| if (rc) |
| return rc; |
| |
| /* let ACPI work its magic */ |
| rc = ata_acpi_on_devcfg(dev); |
| if (rc) |
| return rc; |
| |
| /* massage HPA, do it early as it might change IDENTIFY data */ |
| rc = ata_hpa_resize(dev); |
| if (rc) |
| return rc; |
| |
| /* print device capabilities */ |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(dev, KERN_DEBUG, |
| "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " |
| "85:%04x 86:%04x 87:%04x 88:%04x\n", |
| __func__, |
| id[49], id[82], id[83], id[84], |
| id[85], id[86], id[87], id[88]); |
| |
| /* initialize to-be-configured parameters */ |
| dev->flags &= ~ATA_DFLAG_CFG_MASK; |
| dev->max_sectors = 0; |
| dev->cdb_len = 0; |
| dev->n_sectors = 0; |
| dev->cylinders = 0; |
| dev->heads = 0; |
| dev->sectors = 0; |
| dev->multi_count = 0; |
| |
| /* |
| * common ATA, ATAPI feature tests |
| */ |
| |
| /* find max transfer mode; for printk only */ |
| xfer_mask = ata_id_xfermask(id); |
| |
| if (ata_msg_probe(ap)) |
| ata_dump_id(id); |
| |
| /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ |
| ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, |
| sizeof(fwrevbuf)); |
| |
| ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, |
| sizeof(modelbuf)); |
| |
| /* ATA-specific feature tests */ |
| if (dev->class == ATA_DEV_ATA) { |
| if (ata_id_is_cfa(id)) { |
| /* CPRM may make this media unusable */ |
| if (id[ATA_ID_CFA_KEY_MGMT] & 1) |
| ata_dev_printk(dev, KERN_WARNING, |
| "supports DRM functions and may " |
| "not be fully accessable.\n"); |
| snprintf(revbuf, 7, "CFA"); |
| } else { |
| snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); |
| /* Warn the user if the device has TPM extensions */ |
| if (ata_id_has_tpm(id)) |
| ata_dev_printk(dev, KERN_WARNING, |
| "supports DRM functions and may " |
| "not be fully accessable.\n"); |
| } |
| |
| dev->n_sectors = ata_id_n_sectors(id); |
| |
| /* get current R/W Multiple count setting */ |
| if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) { |
| unsigned int max = dev->id[47] & 0xff; |
| unsigned int cnt = dev->id[59] & 0xff; |
| /* only recognize/allow powers of two here */ |
| if (is_power_of_2(max) && is_power_of_2(cnt)) |
| if (cnt <= max) |
| dev->multi_count = cnt; |
| } |
| |
| if (ata_id_has_lba(id)) { |
| const char *lba_desc; |
| char ncq_desc[24]; |
| |
| lba_desc = "LBA"; |
| dev->flags |= ATA_DFLAG_LBA; |
| if (ata_id_has_lba48(id)) { |
| dev->flags |= ATA_DFLAG_LBA48; |
| lba_desc = "LBA48"; |
| |
| if (dev->n_sectors >= (1UL << 28) && |
| ata_id_has_flush_ext(id)) |
| dev->flags |= ATA_DFLAG_FLUSH_EXT; |
| } |
| |
| /* config NCQ */ |
| rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); |
| if (rc) |
| return rc; |
| |
| /* print device info to dmesg */ |
| if (ata_msg_drv(ap) && print_info) { |
| ata_dev_printk(dev, KERN_INFO, |
| "%s: %s, %s, max %s\n", |
| revbuf, modelbuf, fwrevbuf, |
| ata_mode_string(xfer_mask)); |
| ata_dev_printk(dev, KERN_INFO, |
| "%Lu sectors, multi %u: %s %s\n", |
| (unsigned long long)dev->n_sectors, |
| dev->multi_count, lba_desc, ncq_desc); |
| } |
| } else { |
| /* CHS */ |
| |
| /* Default translation */ |
| dev->cylinders = id[1]; |
| dev->heads = id[3]; |
| dev->sectors = id[6]; |
| |
| if (ata_id_current_chs_valid(id)) { |
| /* Current CHS translation is valid. */ |
| dev->cylinders = id[54]; |
| dev->heads = id[55]; |
| dev->sectors = id[56]; |
| } |
| |
| /* print device info to dmesg */ |
| if (ata_msg_drv(ap) && print_info) { |
| ata_dev_printk(dev, KERN_INFO, |
| "%s: %s, %s, max %s\n", |
| revbuf, modelbuf, fwrevbuf, |
| ata_mode_string(xfer_mask)); |
| ata_dev_printk(dev, KERN_INFO, |
| "%Lu sectors, multi %u, CHS %u/%u/%u\n", |
| (unsigned long long)dev->n_sectors, |
| dev->multi_count, dev->cylinders, |
| dev->heads, dev->sectors); |
| } |
| } |
| |
| dev->cdb_len = 16; |
| } |
| |
| /* ATAPI-specific feature tests */ |
| else if (dev->class == ATA_DEV_ATAPI) { |
| const char *cdb_intr_string = ""; |
| const char *atapi_an_string = ""; |
| const char *dma_dir_string = ""; |
| u32 sntf; |
| |
| rc = atapi_cdb_len(id); |
| if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
| if (ata_msg_warn(ap)) |
| ata_dev_printk(dev, KERN_WARNING, |
| "unsupported CDB len\n"); |
| rc = -EINVAL; |
| goto err_out_nosup; |
| } |
| dev->cdb_len = (unsigned int) rc; |
| |
| /* Enable ATAPI AN if both the host and device have |
| * the support. If PMP is attached, SNTF is required |
| * to enable ATAPI AN to discern between PHY status |
| * changed notifications and ATAPI ANs. |
| */ |
| if (atapi_an && |
| (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && |
| (!sata_pmp_attached(ap) || |
| sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { |
| unsigned int err_mask; |
| |
| /* issue SET feature command to turn this on */ |
| err_mask = ata_dev_set_feature(dev, |
| SETFEATURES_SATA_ENABLE, SATA_AN); |
| if (err_mask) |
| ata_dev_printk(dev, KERN_ERR, |
| "failed to enable ATAPI AN " |
| "(err_mask=0x%x)\n", err_mask); |
| else { |
| dev->flags |= ATA_DFLAG_AN; |
| atapi_an_string = ", ATAPI AN"; |
| } |
| } |
| |
| if (ata_id_cdb_intr(dev->id)) { |
| dev->flags |= ATA_DFLAG_CDB_INTR; |
| cdb_intr_string = ", CDB intr"; |
| } |
| |
| if (atapi_dmadir || atapi_id_dmadir(dev->id)) { |
| dev->flags |= ATA_DFLAG_DMADIR; |
| dma_dir_string = ", DMADIR"; |
| } |
| |
| /* print device info to dmesg */ |
| if (ata_msg_drv(ap) && print_info) |
| ata_dev_printk(dev, KERN_INFO, |
| "ATAPI: %s, %s, max %s%s%s%s\n", |
| modelbuf, fwrevbuf, |
| ata_mode_string(xfer_mask), |
| cdb_intr_string, atapi_an_string, |
| dma_dir_string); |
| } |
| |
| /* determine max_sectors */ |
| dev->max_sectors = ATA_MAX_SECTORS; |
| if (dev->flags & ATA_DFLAG_LBA48) |
| dev->max_sectors = ATA_MAX_SECTORS_LBA48; |
| |
| if (!(dev->horkage & ATA_HORKAGE_IPM)) { |
| if (ata_id_has_hipm(dev->id)) |
| dev->flags |= ATA_DFLAG_HIPM; |
| if (ata_id_has_dipm(dev->id)) |
| dev->flags |= ATA_DFLAG_DIPM; |
| } |
| |
| /* Limit PATA drive on SATA cable bridge transfers to udma5, |
| 200 sectors */ |
| if (ata_dev_knobble(dev)) { |
| if (ata_msg_drv(ap) && print_info) |
| ata_dev_printk(dev, KERN_INFO, |
| "applying bridge limits\n"); |
| dev->udma_mask &= ATA_UDMA5; |
| dev->max_sectors = ATA_MAX_SECTORS; |
| } |
| |
| if ((dev->class == ATA_DEV_ATAPI) && |
| (atapi_command_packet_set(id) == TYPE_TAPE)) { |
| dev->max_sectors = ATA_MAX_SECTORS_TAPE; |
| dev->horkage |= ATA_HORKAGE_STUCK_ERR; |
| } |
| |
| if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) |
| dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, |
| dev->max_sectors); |
| |
| if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) { |
| dev->horkage |= ATA_HORKAGE_IPM; |
| |
| /* reset link pm_policy for this port to no pm */ |
| ap->pm_policy = MAX_PERFORMANCE; |
| } |
| |
| if (ap->ops->dev_config) |
| ap->ops->dev_config(dev); |
| |
| if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { |
| /* Let the user know. We don't want to disallow opens for |
| rescue purposes, or in case the vendor is just a blithering |
| idiot. Do this after the dev_config call as some controllers |
| with buggy firmware may want to avoid reporting false device |
| bugs */ |
| |
| if (print_info) { |
| ata_dev_printk(dev, KERN_WARNING, |
| "Drive reports diagnostics failure. This may indicate a drive\n"); |
| ata_dev_printk(dev, KERN_WARNING, |
| "fault or invalid emulation. Contact drive vendor for information.\n"); |
| } |
| } |
| |
| if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) { |
| ata_dev_printk(dev, KERN_WARNING, "WARNING: device requires " |
| "firmware update to be fully functional.\n"); |
| ata_dev_printk(dev, KERN_WARNING, " contact the vendor " |
| "or visit http://ata.wiki.kernel.org.\n"); |
| } |
| |
| return 0; |
| |
| err_out_nosup: |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(dev, KERN_DEBUG, |
| "%s: EXIT, err\n", __func__); |
| return rc; |
| } |
| |
| /** |
| * ata_cable_40wire - return 40 wire cable type |
| * @ap: port |
| * |
| * Helper method for drivers which want to hardwire 40 wire cable |
| * detection. |
| */ |
| |
| int ata_cable_40wire(struct ata_port *ap) |
| { |
| return ATA_CBL_PATA40; |
| } |
| |
| /** |
| * ata_cable_80wire - return 80 wire cable type |
| * @ap: port |
| * |
| * Helper method for drivers which want to hardwire 80 wire cable |
| * detection. |
| */ |
| |
| int ata_cable_80wire(struct ata_port *ap) |
| { |
| return ATA_CBL_PATA80; |
| } |
| |
| /** |
| * ata_cable_unknown - return unknown PATA cable. |
| * @ap: port |
| * |
| * Helper method for drivers which have no PATA cable detection. |
| */ |
| |
| int ata_cable_unknown(struct ata_port *ap) |
| { |
| return ATA_CBL_PATA_UNK; |
| } |
| |
| /** |
| * ata_cable_ignore - return ignored PATA cable. |
| * @ap: port |
| * |
| * Helper method for drivers which don't use cable type to limit |
| * transfer mode. |
| */ |
| int ata_cable_ignore(struct ata_port *ap) |
| { |
| return ATA_CBL_PATA_IGN; |
| } |
| |
| /** |
| * ata_cable_sata - return SATA cable type |
| * @ap: port |
| * |
| * Helper method for drivers which have SATA cables |
| */ |
| |
| int ata_cable_sata(struct ata_port *ap) |
| { |
| return ATA_CBL_SATA; |
| } |
| |
| /** |
| * ata_bus_probe - Reset and probe ATA bus |
| * @ap: Bus to probe |
| * |
| * Master ATA bus probing function. Initiates a hardware-dependent |
| * bus reset, then attempts to identify any devices found on |
| * the bus. |
| * |
| * LOCKING: |
| * PCI/etc. bus probe sem. |
| * |
| * RETURNS: |
| * Zero on success, negative errno otherwise. |
| */ |
| |
| int ata_bus_probe(struct ata_port *ap) |
| { |
| unsigned int classes[ATA_MAX_DEVICES]; |
| int tries[ATA_MAX_DEVICES]; |
| int rc; |
| struct ata_device *dev; |
| |
| ata_for_each_dev(dev, &ap->link, ALL) |
| tries[dev->devno] = ATA_PROBE_MAX_TRIES; |
| |
| retry: |
| ata_for_each_dev(dev, &ap->link, ALL) { |
| /* If we issue an SRST then an ATA drive (not ATAPI) |
| * may change configuration and be in PIO0 timing. If |
| * we do a hard reset (or are coming from power on) |
| * this is true for ATA or ATAPI. Until we've set a |
| * suitable controller mode we should not touch the |
| * bus as we may be talking too fast. |
| */ |
| dev->pio_mode = XFER_PIO_0; |
| |
| /* If the controller has a pio mode setup function |
| * then use it to set the chipset to rights. Don't |
| * touch the DMA setup as that will be dealt with when |
| * configuring devices. |
| */ |
| if (ap->ops->set_piomode) |
| ap->ops->set_piomode(ap, dev); |
| } |
| |
| /* reset and determine device classes */ |
| ap->ops->phy_reset(ap); |
| |
| ata_for_each_dev(dev, &ap->link, ALL) { |
| if (dev->class != ATA_DEV_UNKNOWN) |
| classes[dev->devno] = dev->class; |
| else |
| classes[dev->devno] = ATA_DEV_NONE; |
| |
| dev->class = ATA_DEV_UNKNOWN; |
| } |
| |
| /* read IDENTIFY page and configure devices. We have to do the identify |
| specific sequence bass-ackwards so that PDIAG- is released by |
| the slave device */ |
| |
| ata_for_each_dev(dev, &ap->link, ALL_REVERSE) { |
| if (tries[dev->devno]) |
| dev->class = classes[dev->devno]; |
| |
| if (!ata_dev_enabled(dev)) |
| continue; |
| |
| rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, |
| dev->id); |
| if (rc) |
| goto fail; |
| } |
| |
| /* Now ask for the cable type as PDIAG- should have been released */ |
| if (ap->ops->cable_detect) |
| ap->cbl = ap->ops->cable_detect(ap); |
| |
| /* We may have SATA bridge glue hiding here irrespective of |
| * the reported cable types and sensed types. When SATA |
| * drives indicate we have a bridge, we don't know which end |
| * of the link the bridge is which is a problem. |
| */ |
| ata_for_each_dev(dev, &ap->link, ENABLED) |
| if (ata_id_is_sata(dev->id)) |
| ap->cbl = ATA_CBL_SATA; |
| |
| /* After the identify sequence we can now set up the devices. We do |
| this in the normal order so that the user doesn't get confused */ |
| |
| ata_for_each_dev(dev, &ap->link, ENABLED) { |
| ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO; |
| rc = ata_dev_configure(dev); |
| ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO; |
| if (rc) |
| goto fail; |
| } |
| |
| /* configure transfer mode */ |
| rc = ata_set_mode(&ap->link, &dev); |
| if (rc) |
| goto fail; |
| |
| ata_for_each_dev(dev, &ap->link, ENABLED) |
| return 0; |
| |
| return -ENODEV; |
| |
| fail: |
| tries[dev->devno]--; |
| |
| switch (rc) { |
| case -EINVAL: |
| /* eeek, something went very wrong, give up */ |
| tries[dev->devno] = 0; |
| break; |
| |
| case -ENODEV: |
| /* give it just one more chance */ |
| tries[dev->devno] = min(tries[dev->devno], 1); |
| case -EIO: |
| if (tries[dev->devno] == 1) { |
| /* This is the last chance, better to slow |
| * down than lose it. |
| */ |
| sata_down_spd_limit(&ap->link, 0); |
| ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
| } |
| } |
| |
| if (!tries[dev->devno]) |
| ata_dev_disable(dev); |
| |
| goto retry; |
| } |
| |
| /** |
| * sata_print_link_status - Print SATA link status |
| * @link: SATA link to printk link status about |
| * |
| * This function prints link speed and status of a SATA link. |
| * |
| * LOCKING: |
| * None. |
| */ |
| static void sata_print_link_status(struct ata_link *link) |
| { |
| u32 sstatus, scontrol, tmp; |
| |
| if (sata_scr_read(link, SCR_STATUS, &sstatus)) |
| return; |
| sata_scr_read(link, SCR_CONTROL, &scontrol); |
| |
| if (ata_phys_link_online(link)) { |
| tmp = (sstatus >> 4) & 0xf; |
| ata_link_printk(link, KERN_INFO, |
| "SATA link up %s (SStatus %X SControl %X)\n", |
| sata_spd_string(tmp), sstatus, scontrol); |
| } else { |
| ata_link_printk(link, KERN_INFO, |
| "SATA link down (SStatus %X SControl %X)\n", |
| sstatus, scontrol); |
| } |
| } |
| |
| /** |
| * ata_dev_pair - return other device on cable |
| * @adev: device |
| * |
| * Obtain the other device on the same cable, or if none is |
| * present NULL is returned |
| */ |
| |
| struct ata_device *ata_dev_pair(struct ata_device *adev) |
| { |
| struct ata_link *link = adev->link; |
| struct ata_device *pair = &link->device[1 - adev->devno]; |
| if (!ata_dev_enabled(pair)) |
| return NULL; |
| return pair; |
| } |
| |
| /** |
| * sata_down_spd_limit - adjust SATA spd limit downward |
| * @link: Link to adjust SATA spd limit for |
| * @spd_limit: Additional limit |
| * |
| * Adjust SATA spd limit of @link downward. Note that this |
| * function only adjusts the limit. The change must be applied |
| * using sata_set_spd(). |
| * |
| * If @spd_limit is non-zero, the speed is limited to equal to or |
| * lower than @spd_limit if such speed is supported. If |
| * @spd_limit is slower than any supported speed, only the lowest |
| * supported speed is allowed. |
| * |
| * LOCKING: |
| * Inherited from caller. |
| * |
| * RETURNS: |
| * 0 on success, negative errno on failure |
| */ |
| int sata_down_spd_limit(struct ata_link *link, u32 spd_limit) |
| { |
| u32 sstatus, spd, mask; |
| int rc, bit; |
| |
| if (!sata_scr_valid(link)) |
| return -EOPNOTSUPP; |
| |
| /* If SCR can be read, use it to determine the current SPD. |
| * If not, use cached value in link->sata_spd. |
| */ |
| rc = sata_scr_read(link, SCR_STATUS, &sstatus); |
| if (rc == 0 && ata_sstatus_online(sstatus)) |
| spd = (sstatus >> 4) & 0xf; |
| else |
| spd = link->sata_spd; |
| |
| mask = link->sata_spd_limit; |
| if (mask <= 1) |
| return -EINVAL; |
| |
| /* unconditionally mask off the highest bit */ |
| bit = fls(mask) - 1; |
| mask &= ~(1 << bit); |
| |
| /* Mask off all speeds higher than or equal to the current |
| * one. Force 1.5Gbps if current SPD is not available. |
| */ |
| if (spd > 1) |
| mask &= (1 << (spd - 1)) - 1; |
| else |
| mask &= 1; |
| |
| /* were we already at the bottom? */ |
| if (!mask) |
| return -EINVAL; |
| |
| if (spd_limit) { |
| if (mask & ((1 << spd_limit) - 1)) |
| mask &= (1 << spd_limit) - 1; |
| else { |
| bit = ffs(mask) - 1; |
| mask = 1 << bit; |
| } |
| } |
| |
| link->sata_spd_limit = mask; |
| |
| ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n", |
| sata_spd_string(fls(mask))); |
| |
| return 0; |
| } |
| |
| static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol) |
| { |
| struct ata_link *host_link = &link->ap->link; |
| u32 limit, target, spd; |
| |
| limit = link->sata_spd_limit; |
| |
| /* Don't configure downstream link faster than upstream link. |
| * It doesn't speed up anything and some PMPs choke on such |
| * configuration. |
| */ |
| if (!ata_is_host_link(link) && host_link->sata_spd) |
| limit &= (1 << host_link->sata_spd) - 1; |
| |
| if (limit == UINT_MAX) |
| target = 0; |
| else |
| target = fls(limit); |
| |
| spd = (*scontrol >> 4) & 0xf; |
| *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4); |
| |
| return spd != target; |
| } |
| |
| /** |
| * sata_set_spd_needed - is SATA spd configuration needed |
| * @link: Link in question |
| * |
| * Test whether the spd limit in SControl matches |
| * @link->sata_spd_limit. This function is used to determine |
| * whether hardreset is necessary to apply SATA spd |
| * configuration. |
| * |
| * LOCKING: |
| * Inherited from caller. |
| * |
| * RETURNS: |
| * 1 if SATA spd configuration is needed, 0 otherwise. |
| */ |
| static int sata_set_spd_needed(struct ata_link *link) |
| { |
| u32 scontrol; |
| |
| if (sata_scr_read(link, SCR_CONTROL, &scontrol)) |
| return 1; |
| |
| return __sata_set_spd_needed(link, &scontrol); |
| } |
| |
| /** |
| * sata_set_spd - set SATA spd according to spd limit |
| * @link: Link to set SATA spd for |
| * |
| * Set SATA spd of @link according to sata_spd_limit. |
| * |
| * LOCKING: |
| * Inherited from caller. |
| * |
| * RETURNS: |
| * 0 if spd doesn't need to be changed, 1 if spd has been |
| * changed. Negative errno if SCR registers are inaccessible. |
| */ |
| int sata_set_spd(struct ata_link *link) |
| { |
| u32 scontrol; |
| int rc; |
| |
| if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
| return rc; |
| |
| if (!__sata_set_spd_needed(link, &scontrol)) |
| return 0; |
| |
| if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
| return rc; |
| |
| return 1; |
| } |
| |
| /* |
| * This mode timing computation functionality is ported over from |
| * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik |
| */ |
| /* |
| * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). |
| * These were taken from ATA/ATAPI-6 standard, rev 0a, except |
| * for UDMA6, which is currently supported only by Maxtor drives. |
| * |
| * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. |
| */ |
| |
| static const struct ata_timing ata_timing[] = { |
| /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */ |
| { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 0, 600, 0 }, |
| { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 0, 383, 0 }, |
| { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 0, 240, 0 }, |
| { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 0, 180, 0 }, |
| { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 0, 120, 0 }, |
| { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 0, 100, 0 }, |
| { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 0, 80, 0 }, |
| |
| { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 50, 960, 0 }, |
| { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 480, 0 }, |
| { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 20, 240, 0 }, |
| |
| { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 20, 480, 0 }, |
| { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 5, 150, 0 }, |
| { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 5, 120, 0 }, |
| { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 5, 100, 0 }, |
| { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 5, 80, 0 }, |
| |
| /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */ |
| { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 0, 120 }, |
| { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 0, 80 }, |
| { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 0, 60 }, |
| { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 0, 45 }, |
| { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 0, 30 }, |
| { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 0, 20 }, |
| { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 0, 15 }, |
| |
| { 0xFF } |
| }; |
| |
| #define ENOUGH(v, unit) (((v)-1)/(unit)+1) |
| #define EZ(v, unit) ((v)?ENOUGH(v, unit):0) |
| |
| static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) |
| { |
| q->setup = EZ(t->setup * 1000, T); |
| q->act8b = EZ(t->act8b * 1000, T); |
| q->rec8b = EZ(t->rec8b * 1000, T); |
| q->cyc8b = EZ(t->cyc8b * 1000, T); |
| q->active = EZ(t->active * 1000, T); |
| q->recover = EZ(t->recover * 1000, T); |
| q->dmack_hold = EZ(t->dmack_hold * 1000, T); |
| q->cycle = EZ(t->cycle * 1000, T); |
| q->udma = EZ(t->udma * 1000, UT); |
| } |
| |
| void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, |
| struct ata_timing *m, unsigned int what) |
| { |
| if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); |
| if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); |
| if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); |
| if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); |
| if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); |
| if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); |
| if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, b->dmack_hold); |
| if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); |
| if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); |
| } |
| |
| const struct ata_timing *ata_timing_find_mode(u8 xfer_mode) |
| { |
| const struct ata_timing *t = ata_timing; |
| |
| while (xfer_mode > t->mode) |
| t++; |
| |
| if (xfer_mode == t->mode) |
| return t; |
| return NULL; |
| } |
| |
| int ata_timing_compute(struct ata_device *adev, unsigned short speed, |
| struct ata_timing *t, int T, int UT) |
| { |
| const u16 *id = adev->id; |
| const struct ata_timing *s; |
| struct ata_timing p; |
| |
| /* |
| * Find the mode. |
| */ |
| |
| if (!(s = ata_timing_find_mode(speed))) |
| return -EINVAL; |
| |
| memcpy(t, s, sizeof(*s)); |
| |
| /* |
| * If the drive is an EIDE drive, it can tell us it needs extended |
| * PIO/MW_DMA cycle timing. |
| */ |
| |
| if (id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ |
| memset(&p, 0, sizeof(p)); |
| |
| if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { |
| if (speed <= XFER_PIO_2) |
| p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO]; |
| else if ((speed <= XFER_PIO_4) || |
| (speed == XFER_PIO_5 && !ata_id_is_cfa(id))) |
| p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO_IORDY]; |
| } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) |
| p.cycle = id[ATA_ID_EIDE_DMA_MIN]; |
| |
| ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); |
| } |
| |
| /* |
|