| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * libata-core.c - helper library for ATA |
| * |
| * Copyright 2003-2004 Red Hat, Inc. All rights reserved. |
| * Copyright 2003-2004 Jeff Garzik |
| * |
| * libata documentation is available via 'make {ps|pdf}docs', |
| * as Documentation/driver-api/libata.rst |
| * |
| * 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) |
| * |
| * libata is essentially a library of internal helper functions for |
| * low-level ATA host controller drivers. As such, the API/ABI is |
| * likely to change as new drivers are added and updated. |
| * Do not depend on ABI/API stability. |
| */ |
| |
| #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/time.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 <linux/glob.h> |
| #include <scsi/scsi.h> |
| #include <scsi/scsi_cmnd.h> |
| #include <scsi/scsi_host.h> |
| #include <linux/libata.h> |
| #include <asm/byteorder.h> |
| #include <asm/unaligned.h> |
| #include <linux/cdrom.h> |
| #include <linux/ratelimit.h> |
| #include <linux/leds.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/platform_device.h> |
| #include <asm/setup.h> |
| |
| #define CREATE_TRACE_POINTS |
| #include <trace/events/libata.h> |
| |
| #include "libata.h" |
| #include "libata-transport.h" |
| |
| const struct ata_port_operations ata_base_port_ops = { |
| .prereset = ata_std_prereset, |
| .postreset = ata_std_postreset, |
| .error_handler = ata_std_error_handler, |
| .sched_eh = ata_std_sched_eh, |
| .end_eh = ata_std_end_eh, |
| }; |
| |
| const struct ata_port_operations sata_port_ops = { |
| .inherits = &ata_base_port_ops, |
| |
| .qc_defer = ata_std_qc_defer, |
| .hardreset = sata_std_hardreset, |
| }; |
| EXPORT_SYMBOL_GPL(sata_port_ops); |
| |
| 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 void ata_dev_xfermask(struct ata_device *dev); |
| static unsigned long ata_dev_blacklisted(const struct ata_device *dev); |
| |
| atomic_t ata_print_id = ATOMIC_INIT(0); |
| |
| #ifdef CONFIG_ATA_FORCE |
| struct ata_force_param { |
| const char *name; |
| u8 cbl; |
| u8 spd_limit; |
| unsigned long xfer_mask; |
| unsigned int horkage_on; |
| unsigned int horkage_off; |
| u16 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[COMMAND_LINE_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/admin-guide/kernel-parameters.rst for details)"); |
| #endif |
| |
| 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; |
| } |
| EXPORT_SYMBOL_GPL(ata_link_next); |
| |
| /** |
| * 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; |
| } |
| EXPORT_SYMBOL_GPL(ata_dev_next); |
| |
| /** |
| * 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; |
| } |
| |
| #ifdef CONFIG_ATA_FORCE |
| /** |
| * 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_notice(ap, "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_notice(link, "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_notice(link, |
| "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_notice(dev, "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_notice(dev, "FORCE: horkage modified (%s)\n", |
| fe->param.name); |
| } |
| } |
| #else |
| static inline void ata_force_link_limits(struct ata_link *link) { } |
| static inline void ata_force_xfermask(struct ata_device *dev) { } |
| static inline void ata_force_horkage(struct ata_device *dev) { } |
| #endif |
| |
| /** |
| * 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; |
| } |
| } |
| EXPORT_SYMBOL_GPL(atapi_cmd_type); |
| |
| 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(const 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_warn(dev, |
| "device reported invalid CHS sector 0\n"); |
| return U64_MAX; |
| } |
| |
| 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 |
| * @class: IO priority class |
| * |
| * 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, int class) |
| { |
| tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| tf->flags |= tf_flags; |
| |
| if (ata_ncq_enabled(dev) && !ata_tag_internal(tag)) { |
| /* 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 = ATA_LBA; |
| if (tf->flags & ATA_TFLAG_FUA) |
| tf->device |= 1 << 7; |
| |
| if (dev->flags & ATA_DFLAG_NCQ_PRIO) { |
| if (class == IOPRIO_CLASS_RT) |
| tf->hob_nsect |= ATA_PRIO_HIGH << |
| ATA_SHIFT_PRIO; |
| } |
| } 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); |
| } |
| EXPORT_SYMBOL_GPL(ata_pack_xfermask); |
| |
| /** |
| * 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 destination 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; |
| } |
| EXPORT_SYMBOL_GPL(ata_xfer_mask2mode); |
| |
| /** |
| * 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; |
| } |
| EXPORT_SYMBOL_GPL(ata_xfer_mode2mask); |
| |
| /** |
| * 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; |
| } |
| EXPORT_SYMBOL_GPL(ata_xfer_mode2shift); |
| |
| /** |
| * 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>"; |
| } |
| EXPORT_SYMBOL_GPL(ata_mode_string); |
| |
| 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]; |
| } |
| |
| /** |
| * 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, |
| * %ATA_DEV_ZAC, 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; |
| } |
| |
| if ((tf->lbam == 0xcd) && (tf->lbah == 0xab)) { |
| DPRINTK("found ZAC device by sig\n"); |
| return ATA_DEV_ZAC; |
| } |
| |
| DPRINTK("unknown device\n"); |
| return ATA_DEV_UNKNOWN; |
| } |
| EXPORT_SYMBOL_GPL(ata_dev_classify); |
| |
| /** |
| * 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; |
| } |
| } |
| EXPORT_SYMBOL_GPL(ata_id_string); |
| |
| /** |
| * 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'; |
| } |
| EXPORT_SYMBOL_GPL(ata_id_c_string); |
| |
| 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_warn(dev, |
| "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_warn(dev, |
| "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 && dev->class != ATA_DEV_ZAC) || |
| !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_warn(dev, |
| "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_info(dev, |
| "HPA detected: current %llu, native %llu\n", |
| (unsigned long long)sectors, |
| (unsigned long long)native_sectors); |
| else if (native_sectors < sectors) |
| ata_dev_warn(dev, |
| "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_warn(dev, |
| "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_err(dev, |
| "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_info(dev, |
| "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); |
| } |
| EXPORT_SYMBOL_GPL(ata_id_xfermask); |
| |
| 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 transfer 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 preempted_tag; |
| u32 preempted_sactive; |
| u64 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 */ |
| qc = __ata_qc_from_tag(ap, ATA_TAG_INTERNAL); |
| |
| qc->tag = ATA_TAG_INTERNAL; |
| qc->hw_tag = 0; |
| 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); |
| |
| /* some SATA bridges need us to indicate data xfer direction */ |
| if (tf->protocol == ATAPI_PROT_DMA && (dev->flags & ATA_DFLAG_DMADIR) && |
| dma_dir == DMA_FROM_DEVICE) |
| qc->tf.feature |= ATAPI_DMADIR; |
| |
| 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; |
| } |
| } |
| |
| if (ap->ops->error_handler) |
| ata_eh_release(ap); |
| |
| rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout)); |
| |
| if (ap->ops->error_handler) |
| ata_eh_acquire(ap); |
| |
| 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_warn(dev, "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; |
| } else if (qc->tf.command == ATA_CMD_REQ_SENSE_DATA) { |
| qc->result_tf.command |= ATA_SENSE; |
| } |
| |
| /* 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 transfer 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_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; |
| } |
| EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
| |
| /** |
| * 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); |
| } |
| EXPORT_SYMBOL_GPL(ata_do_dev_read_id); |
| |
| /** |
| * 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_dbg(dev, "%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 */ |
| /* fall through */ |
| case ATA_DEV_ATA: |
| case ATA_DEV_ZAC: |
| 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_dbg(dev, "NODEV after polling detection\n"); |
| return -ENOENT; |
| } |
| |
| if (is_semb) { |
| ata_dev_info(dev, |
| "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_dbg(dev, |
| "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_dbg(dev, "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 || class == ATA_DEV_ZAC) { |
| if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) |
| goto err_out; |
| if (ap->host->flags & ATA_HOST_IGNORE_ATA && |
| ata_id_is_ata(id)) { |
| ata_dev_dbg(dev, |
| "host indicates ignore ATA devices, ignored\n"); |
| return -ENOENT; |
| } |
| } 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 || class == ATA_DEV_ZAC)) { |
| /* |
| * 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_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n", |
| reason, err_mask); |
| return rc; |
| } |
| |
| /** |
| * ata_read_log_page - read a specific log page |
| * @dev: target device |
| * @log: log to read |
| * @page: page to read |
| * @buf: buffer to store read page |
| * @sectors: number of sectors to read |
| * |
| * Read log page using READ_LOG_EXT command. |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep). |
| * |
| * RETURNS: |
| * 0 on success, AC_ERR_* mask otherwise. |
| */ |
| unsigned int ata_read_log_page(struct ata_device *dev, u8 log, |
| u8 page, void *buf, unsigned int sectors) |
| { |
| unsigned long ap_flags = dev->link->ap->flags; |
| struct ata_taskfile tf; |
| unsigned int err_mask; |
| bool dma = false; |
| |
| DPRINTK("read log page - log 0x%x, page 0x%x\n", log, page); |
| |
| /* |
| * Return error without actually issuing the command on controllers |
| * which e.g. lockup on a read log page. |
| */ |
| if (ap_flags & ATA_FLAG_NO_LOG_PAGE) |
| return AC_ERR_DEV; |
| |
| retry: |
| ata_tf_init(dev, &tf); |
| if (dev->dma_mode && ata_id_has_read_log_dma_ext(dev->id) && |
| !(dev->horkage & ATA_HORKAGE_NO_DMA_LOG)) { |
| tf.command = ATA_CMD_READ_LOG_DMA_EXT; |
| tf.protocol = ATA_PROT_DMA; |
| dma = true; |
| } else { |
| tf.command = ATA_CMD_READ_LOG_EXT; |
| tf.protocol = ATA_PROT_PIO; |
| dma = false; |
| } |
| tf.lbal = log; |
| tf.lbam = page; |
| tf.nsect = sectors; |
| tf.hob_nsect = sectors >> 8; |
| tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE; |
| |
| err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, |
| buf, sectors * ATA_SECT_SIZE, 0); |
| |
| if (err_mask && dma) { |
| dev->horkage |= ATA_HORKAGE_NO_DMA_LOG; |
| ata_dev_warn(dev, "READ LOG DMA EXT failed, trying PIO\n"); |
| goto retry; |
| } |
| |
| DPRINTK("EXIT, err_mask=%x\n", err_mask); |
| return err_mask; |
| } |
| |
| static bool ata_log_supported(struct ata_device *dev, u8 log) |
| { |
| struct ata_port *ap = dev->link->ap; |
| |
| if (ata_read_log_page(dev, ATA_LOG_DIRECTORY, 0, ap->sector_buf, 1)) |
| return false; |
| return get_unaligned_le16(&ap->sector_buf[log * 2]) ? true : false; |
| } |
| |
| static bool ata_identify_page_supported(struct ata_device *dev, u8 page) |
| { |
| struct ata_port *ap = dev->link->ap; |
| unsigned int err, i; |
| |
| if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE)) { |
| ata_dev_warn(dev, "ATA Identify Device Log not supported\n"); |
| return false; |
| } |
| |
| /* |
| * Read IDENTIFY DEVICE data log, page 0, to figure out if the page is |
| * supported. |
| */ |
| err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 0, ap->sector_buf, |
| 1); |
| if (err) { |
| ata_dev_info(dev, |
| "failed to get Device Identify Log Emask 0x%x\n", |
| err); |
| return false; |
| } |
| |
| for (i = 0; i < ap->sector_buf[8]; i++) { |
| if (ap->sector_buf[9 + i] == page) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| 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_info(dev, "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 void ata_dev_config_ncq_send_recv(struct ata_device *dev) |
| { |
| struct ata_port *ap = dev->link->ap; |
| unsigned int err_mask; |
| |
| if (!ata_log_supported(dev, ATA_LOG_NCQ_SEND_RECV)) { |
| ata_dev_warn(dev, "NCQ Send/Recv Log not supported\n"); |
| return; |
| } |
| err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_SEND_RECV, |
| 0, ap->sector_buf, 1); |
| if (err_mask) { |
| ata_dev_dbg(dev, |
| "failed to get NCQ Send/Recv Log Emask 0x%x\n", |
| err_mask); |
| } else { |
| u8 *cmds = dev->ncq_send_recv_cmds; |
| |
| dev->flags |= ATA_DFLAG_NCQ_SEND_RECV; |
| memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_SEND_RECV_SIZE); |
| |
| if (dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) { |
| ata_dev_dbg(dev, "disabling queued TRIM support\n"); |
| cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &= |
| ~ATA_LOG_NCQ_SEND_RECV_DSM_TRIM; |
| } |
| } |
| } |
| |
| static void ata_dev_config_ncq_non_data(struct ata_device *dev) |
| { |
| struct ata_port *ap = dev->link->ap; |
| unsigned int err_mask; |
| |
| if (!ata_log_supported(dev, ATA_LOG_NCQ_NON_DATA)) { |
| ata_dev_warn(dev, |
| "NCQ Send/Recv Log not supported\n"); |
| return; |
| } |
| err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_NON_DATA, |
| 0, ap->sector_buf, 1); |
| if (err_mask) { |
| ata_dev_dbg(dev, |
| "failed to get NCQ Non-Data Log Emask 0x%x\n", |
| err_mask); |
| } else { |
| u8 *cmds = dev->ncq_non_data_cmds; |
| |
| memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_NON_DATA_SIZE); |
| } |
| } |
| |
| static void ata_dev_config_ncq_prio(struct ata_device *dev) |
| { |
| struct ata_port *ap = dev->link->ap; |
| unsigned int err_mask; |
| |
| if (!(dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE)) { |
| dev->flags &= ~ATA_DFLAG_NCQ_PRIO; |
| return; |
| } |
| |
| err_mask = ata_read_log_page(dev, |
| ATA_LOG_IDENTIFY_DEVICE, |
| ATA_LOG_SATA_SETTINGS, |
| ap->sector_buf, |
| 1); |
| if (err_mask) { |
| ata_dev_dbg(dev, |
| "failed to get Identify Device data, Emask 0x%x\n", |
| err_mask); |
| return; |
| } |
| |
| if (ap->sector_buf[ATA_LOG_NCQ_PRIO_OFFSET] & BIT(3)) { |
| dev->flags |= ATA_DFLAG_NCQ_PRIO; |
| } else { |
| dev->flags &= ~ATA_DFLAG_NCQ_PRIO; |
| ata_dev_dbg(dev, "SATA page does not support priority\n"); |
| } |
| |
| } |
| |
| 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 (!IS_ENABLED(CONFIG_SATA_HOST)) |
| 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); |
| 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_err(dev, |
| "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); |
| |
| if ((ap->flags & ATA_FLAG_FPDMA_AUX)) { |
| if (ata_id_has_ncq_send_and_recv(dev->id)) |
| ata_dev_config_ncq_send_recv(dev); |
| if (ata_id_has_ncq_non_data(dev->id)) |
| ata_dev_config_ncq_non_data(dev); |
| if (ata_id_has_ncq_prio(dev->id)) |
| ata_dev_config_ncq_prio(dev); |
| } |
| |
| return 0; |
| } |
| |
| static void ata_dev_config_sense_reporting(struct ata_device *dev) |
| { |
| unsigned int err_mask; |
| |
| if (!ata_id_has_sense_reporting(dev->id)) |
| return; |
| |
| if (ata_id_sense_reporting_enabled(dev->id)) |
| return; |
| |
| err_mask = ata_dev_set_feature(dev, SETFEATURE_SENSE_DATA, 0x1); |
| if (err_mask) { |
| ata_dev_dbg(dev, |
| "failed to enable Sense Data Reporting, Emask 0x%x\n", |
| err_mask); |
| } |
| } |
| |
| static void ata_dev_config_zac(struct ata_device *dev) |
| { |
| struct ata_port *ap = dev->link->ap; |
| unsigned int err_mask; |
| u8 *identify_buf = ap->sector_buf; |
| |
| dev->zac_zones_optimal_open = U32_MAX; |
| dev->zac_zones_optimal_nonseq = U32_MAX; |
| dev->zac_zones_max_open = U32_MAX; |
| |
| /* |
| * Always set the 'ZAC' flag for Host-managed devices. |
| */ |
| if (dev->class == ATA_DEV_ZAC) |
| dev->flags |= ATA_DFLAG_ZAC; |
| else if (ata_id_zoned_cap(dev->id) == 0x01) |
| /* |
| * Check for host-aware devices. |
| */ |
| dev->flags |= ATA_DFLAG_ZAC; |
| |
| if (!(dev->flags & ATA_DFLAG_ZAC)) |
| return; |
| |
| if (!ata_identify_page_supported(dev, ATA_LOG_ZONED_INFORMATION)) { |
| ata_dev_warn(dev, |
| "ATA Zoned Information Log not supported\n"); |
| return; |
| } |
| |
| /* |
| * Read IDENTIFY DEVICE data log, page 9 (Zoned-device information) |
| */ |
| err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, |
| ATA_LOG_ZONED_INFORMATION, |
| identify_buf, 1); |
| if (!err_mask) { |
| u64 zoned_cap, opt_open, opt_nonseq, max_open; |
| |
| zoned_cap = get_unaligned_le64(&identify_buf[8]); |
| if ((zoned_cap >> 63)) |
| dev->zac_zoned_cap = (zoned_cap & 1); |
| opt_open = get_unaligned_le64(&identify_buf[24]); |
| if ((opt_open >> 63)) |
| dev->zac_zones_optimal_open = (u32)opt_open; |
| opt_nonseq = get_unaligned_le64(&identify_buf[32]); |
| if ((opt_nonseq >> 63)) |
| dev->zac_zones_optimal_nonseq = (u32)opt_nonseq; |
| max_open = get_unaligned_le64(&identify_buf[40]); |
| if ((max_open >> 63)) |
| dev->zac_zones_max_open = (u32)max_open; |
| } |
| } |
| |
| static void ata_dev_config_trusted(struct ata_device *dev) |
| { |
| struct ata_port *ap = dev->link->ap; |
| u64 trusted_cap; |
| unsigned int err; |
| |
| if (!ata_id_has_trusted(dev->id)) |
| return; |
| |
| if (!ata_identify_page_supported(dev, ATA_LOG_SECURITY)) { |
| ata_dev_warn(dev, |
| "Security Log not supported\n"); |
| return; |
| } |
| |
| err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, ATA_LOG_SECURITY, |
| ap->sector_buf, 1); |
| if (err) { |
| ata_dev_dbg(dev, |
| "failed to read Security Log, Emask 0x%x\n", err); |
| return; |
| } |
| |
| trusted_cap = get_unaligned_le64(&ap->sector_buf[40]); |
| if (!(trusted_cap & (1ULL << 63))) { |
| ata_dev_dbg(dev, |
| "Trusted Computing capability qword not valid!\n"); |
| return; |
| } |
| |
| if (trusted_cap & (1 << 0)) |
| dev->flags |= ATA_DFLAG_TRUSTED; |
| } |
| |
| /** |
| * 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; |
| unsigned int err_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_info(dev, "%s: ENTER/EXIT -- nodev\n", __func__); |
| return 0; |
| } |
| |
| if (ata_msg_probe(ap)) |
| ata_dev_dbg(dev, "%s: ENTER\n", __func__); |
| |
| /* set horkage */ |
| dev->horkage |= ata_dev_blacklisted(dev); |
| ata_force_horkage(dev); |
| |
| if (dev->horkage & ATA_HORKAGE_DISABLE) { |
| ata_dev_info(dev, "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_warn(dev, "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; |
| |
| /* some WD SATA-1 drives have issues with LPM, turn on NOLPM for them */ |
| if ((dev->horkage & ATA_HORKAGE_WD_BROKEN_LPM) && |
| (id[ATA_ID_SATA_CAPABILITY] & 0xe) == 0x2) |
| dev->horkage |= ATA_HORKAGE_NOLPM; |
| |
| if (ap->flags & ATA_FLAG_NO_LPM) |
| dev->horkage |= ATA_HORKAGE_NOLPM; |
| |
| if (dev->horkage & ATA_HORKAGE_NOLPM) { |
| ata_dev_warn(dev, "LPM support broken, forcing max_power\n"); |
| dev->link->ap->target_lpm_policy = ATA_LPM_MAX_POWER; |
| } |
| |
| /* 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_dbg(dev, |
| "%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 || dev->class == ATA_DEV_ZAC) { |
| if (ata_id_is_cfa(id)) { |
| /* CPRM may make this media unusable */ |
| if (id[ATA_ID_CFA_KEY_MGMT] & 1) |
| ata_dev_warn(dev, |
| "supports DRM functions and may not be fully accessible\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_warn(dev, |
| "supports DRM functions and may not be fully accessible\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_info(dev, "%s: %s, %s, max %s\n", |
| revbuf, modelbuf, fwrevbuf, |
| ata_mode_string(xfer_mask)); |
| ata_dev_info(dev, |
| "%llu 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_info(dev, "%s: %s, %s, max %s\n", |
| revbuf, modelbuf, fwrevbuf, |
| ata_mode_string(xfer_mask)); |
| ata_dev_info(dev, |
| "%llu sectors, multi %u, CHS %u/%u/%u\n", |
| (unsigned long long)dev->n_sectors, |
| dev->multi_count, dev->cylinders, |
| dev->heads, dev->sectors); |
| } |
| } |
| |
| /* Check and mark DevSlp capability. Get DevSlp timing variables |
| * from SATA Settings page of Identify Device Data Log. |
| */ |
| if (ata_id_has_devslp(dev->id)) { |
| u8 *sata_setting = ap->sector_buf; |
| int i, j; |
| |
| dev->flags |= ATA_DFLAG_DEVSLP; |
| err_mask = ata_read_log_page(dev, |
| ATA_LOG_IDENTIFY_DEVICE, |
| ATA_LOG_SATA_SETTINGS, |
| sata_setting, |
| 1); |
| if (err_mask) |
| ata_dev_dbg(dev, |
| "failed to get Identify Device Data, Emask 0x%x\n", |
| err_mask); |
| else |
| for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) { |
| j = ATA_LOG_DEVSLP_OFFSET + i; |
| dev->devslp_timing[i] = sata_setting[j]; |
| } |
| } |
| ata_dev_config_sense_reporting(dev); |
| ata_dev_config_zac(dev); |
| ata_dev_config_trusted(dev); |
| dev->cdb_len = 32; |
| } |
| |
| /* 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_warn(dev, "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)) { |
| /* 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_err(dev, |
| "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 || (dev->horkage & ATA_HORKAGE_ATAPI_DMADIR) || atapi_id_dmadir(dev->id)) { |
| dev->flags |= ATA_DFLAG_DMADIR; |
| dma_dir_string = ", DMADIR"; |
| } |
| |
| if (ata_id_has_da(dev->id)) { |
| dev->flags |= ATA_DFLAG_DA; |
| zpodd_init(dev); |
| } |
| |
| /* print device info to dmesg */ |
| if (ata_msg_drv(ap) && print_info) |
| ata_dev_info(dev, |
| "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; |
| |
| /* 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_info(dev, "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 (dev->horkage & ATA_HORKAGE_MAX_SEC_1024) |
| dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_1024, |
| dev->max_sectors); |
| |
| if (dev->horkage & ATA_HORKAGE_MAX_SEC_LBA48) |
| dev->max_sectors = ATA_MAX_SECTORS_LBA48; |
| |
| 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_warn(dev, |
| "Drive reports diagnostics failure. This may indicate a drive\n"); |
| ata_dev_warn(dev, |
| "fault or invalid emulation. Contact drive vendor for information.\n"); |
| } |
| } |
| |
| if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) { |
| ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n"); |
| ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n"); |
| } |
| |
| return 0; |
| |
| err_out_nosup: |
| if (ata_msg_probe(ap)) |
| ata_dev_dbg(dev, "%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; |
| } |
| EXPORT_SYMBOL_GPL(ata_cable_40wire); |
| |
| /** |
| * 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; |
| } |
| EXPORT_SYMBOL_GPL(ata_cable_80wire); |
| |
| /** |
| * 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; |
| } |
| EXPORT_SYMBOL_GPL(ata_cable_unknown); |
| |
| /** |
| * 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; |
| } |
| EXPORT_SYMBOL_GPL(ata_cable_ignore); |
| |
| /** |
| * 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; |
| } |
| EXPORT_SYMBOL_GPL(ata_cable_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; |
| dev->dma_mode = 0xff; |
| |
| /* 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); |
| /* fall through */ |
| 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_info(link, "SATA link up %s (SStatus %X SControl %X)\n", |
| sata_spd_string(tmp), sstatus, scontrol); |
| } else { |
| ata_link_info(link, "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; |
| } |
| EXPORT_SYMBOL_GPL(ata_dev_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. At |
| * this point, if current SPD is not available and we previously |
| * recorded the link speed from SStatus, the driver has already |
| * masked off the highest bit so mask should already be 1 or 0. |
| * Otherwise, we should not force 1.5Gbps on a link where we have |
| * not previously recorded speed from SStatus. Just return in this |
| * case. |
| */ |
| if (spd > 1) |
| mask &= (1 << (spd - 1)) - 1; |
| else |
| return -EINVAL; |
| |
| /* 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_warn(link, "limiting SATA link speed to %s\n", |
| sata_spd_string(fls(mask))); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_ATA_ACPI |
| /** |
| * ata_timing_cycle2mode - find xfer mode for the specified cycle duration |
| * @xfer_shift: ATA_SHIFT_* value for transfer type to examine. |
| * @cycle: cycle duration in ns |
| * |
| * Return matching xfer mode for @cycle. The returned mode is of |
| * the transfer type specified by @xfer_shift. If @cycle is too |
| * slow for @xfer_shift, 0xff is returned. If @cycle is faster |
| * than the fastest known mode, the fasted mode is returned. |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * Matching xfer_mode, 0xff if no match found. |
| */ |
| u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle) |
| { |
| u8 base_mode = 0xff, last_mode = 0xff; |
| const struct ata_xfer_ent *ent; |
| const struct ata_timing *t; |
| |
| for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) |
| if (ent->shift == xfer_shift) |
| base_mode = ent->base; |
| |
| for (t = ata_timing_find_mode(base_mode); |
| t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) { |
| unsigned short this_cycle; |
| |
| switch (xfer_shift) { |
| case ATA_SHIFT_PIO: |
| case ATA_SHIFT_MWDMA: |
| this_cycle = t->cycle; |
| break; |
| case ATA_SHIFT_UDMA: |
| this_cycle = t->udma; |
| break; |
| default: |
| return 0xff; |
| } |
| |
| if (cycle > this_cycle) |
| break; |
| |
| last_mode = t->mode; |
| } |
| |
| return last_mode; |
| } |
| #endif |
| |
| /** |
| * ata_down_xfermask_limit - adjust dev xfer masks downward |
| * @dev: Device to adjust xfer masks |
| * @sel: ATA_DNXFER_* selector |
| * |
| * Adjust xfer masks of @dev downward. Note that this function |
| * does not apply the change. Invoking ata_set_mode() afterwards |
| * will apply the limit. |
| * |
| * LOCKING: |
| * Inherited from caller. |
| * |
| * RETURNS: |
| * 0 on success, negative errno on failure |
| */ |
| int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) |
| { |
| char buf[32]; |
| unsigned long orig_mask, xfer_mask; |
| unsigned long pio_mask, mwdma_mask, udma_mask; |
| int quiet, highbit; |
| |
| quiet = !!(sel & ATA_DNXFER_QUIET); |
| sel &= ~ATA_DNXFER_QUIET; |
| |
| xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, |
| dev->mwdma_mask, |
| dev->udma_mask); |
| ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); |
| |
| switch (sel) { |
| case ATA_DNXFER_PIO: |
| highbit = fls(pio_mask) - 1; |
| pio_mask &= ~(1 << highbit); |
| break; |
| |
| case ATA_DNXFER_DMA: |
| if (udma_mask) { |
| highbit = fls(udma_mask) - 1; |
| udma_mask &= ~(1 << highbit); |
| if (!udma_mask) |
| return -ENOENT; |
| } else if (mwdma_mask) { |
| highbit = fls(mwdma_mask) - 1; |
| mwdma_mask &= ~(1 << highbit); |
| if (!mwdma_mask) |
| return -ENOENT; |
| } |
| break; |
| |
| case ATA_DNXFER_40C: |
| udma_mask &= ATA_UDMA_MASK_40C; |
| break; |
| |
| case ATA_DNXFER_FORCE_PIO0: |
| pio_mask &= 1; |
| /* fall through */ |
| case ATA_DNXFER_FORCE_PIO: |
| mwdma_mask = 0; |
| udma_mask = 0; |
| break; |
| |
| default: |
| BUG(); |
| } |
| |
| xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); |
| |
| if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) |
| return -ENOENT; |
| |
| if (!quiet) { |
| if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) |
| snprintf(buf, sizeof(buf), "%s:%s", |
| ata_mode_string(xfer_mask), |
| ata_mode_string(xfer_mask & ATA_MASK_PIO)); |
| else |
| snprintf(buf, sizeof(buf), "%s", |
| ata_mode_string(xfer_mask)); |
| |
| ata_dev_warn(dev, "limiting speed to %s\n", buf); |
| } |
| |
| ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, |
| &dev->udma_mask); |
| |
| return 0; |
| } |
| |
| static int ata_dev_set_mode(struct ata_device *dev) |
| { |
| struct ata_port *ap = dev->link->ap; |
| struct ata_eh_context *ehc = &dev->link->eh_context; |
| const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER; |
| const char *dev_err_whine = ""; |
| |