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6550 lines
166 KiB
6550 lines
166 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* libata-core.c - helper library for ATA |
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* |
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* Copyright 2003-2004 Red Hat, Inc. All rights reserved. |
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* Copyright 2003-2004 Jeff Garzik |
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* |
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* libata documentation is available via 'make {ps|pdf}docs', |
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* as Documentation/driver-api/libata.rst |
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* |
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* Hardware documentation available from http://www.t13.org/ and |
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* http://www.sata-io.org/ |
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* |
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* Standards documents from: |
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* http://www.t13.org (ATA standards, PCI DMA IDE spec) |
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* http://www.t10.org (SCSI MMC - for ATAPI MMC) |
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* http://www.sata-io.org (SATA) |
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* http://www.compactflash.org (CF) |
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* http://www.qic.org (QIC157 - Tape and DSC) |
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* http://www.ce-ata.org (CE-ATA: not supported) |
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* |
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* libata is essentially a library of internal helper functions for |
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* low-level ATA host controller drivers. As such, the API/ABI is |
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* likely to change as new drivers are added and updated. |
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* Do not depend on ABI/API stability. |
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*/ |
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|
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/pci.h> |
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#include <linux/init.h> |
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#include <linux/list.h> |
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#include <linux/mm.h> |
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#include <linux/spinlock.h> |
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#include <linux/blkdev.h> |
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#include <linux/delay.h> |
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#include <linux/timer.h> |
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#include <linux/time.h> |
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#include <linux/interrupt.h> |
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#include <linux/completion.h> |
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#include <linux/suspend.h> |
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#include <linux/workqueue.h> |
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#include <linux/scatterlist.h> |
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#include <linux/io.h> |
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#include <linux/log2.h> |
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#include <linux/slab.h> |
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#include <linux/glob.h> |
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#include <scsi/scsi.h> |
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#include <scsi/scsi_cmnd.h> |
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#include <scsi/scsi_host.h> |
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#include <linux/libata.h> |
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#include <asm/byteorder.h> |
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#include <asm/unaligned.h> |
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#include <linux/cdrom.h> |
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#include <linux/ratelimit.h> |
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#include <linux/leds.h> |
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#include <linux/pm_runtime.h> |
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#include <linux/platform_device.h> |
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#include <asm/setup.h> |
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|
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#define CREATE_TRACE_POINTS |
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#include <trace/events/libata.h> |
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|
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#include "libata.h" |
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#include "libata-transport.h" |
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|
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const struct ata_port_operations ata_base_port_ops = { |
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.prereset = ata_std_prereset, |
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.postreset = ata_std_postreset, |
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.error_handler = ata_std_error_handler, |
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.sched_eh = ata_std_sched_eh, |
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.end_eh = ata_std_end_eh, |
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}; |
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|
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const struct ata_port_operations sata_port_ops = { |
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.inherits = &ata_base_port_ops, |
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|
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.qc_defer = ata_std_qc_defer, |
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.hardreset = sata_std_hardreset, |
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}; |
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EXPORT_SYMBOL_GPL(sata_port_ops); |
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|
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static unsigned int ata_dev_init_params(struct ata_device *dev, |
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u16 heads, u16 sectors); |
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static unsigned int ata_dev_set_xfermode(struct ata_device *dev); |
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static void ata_dev_xfermask(struct ata_device *dev); |
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static unsigned long ata_dev_blacklisted(const struct ata_device *dev); |
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|
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atomic_t ata_print_id = ATOMIC_INIT(0); |
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|
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#ifdef CONFIG_ATA_FORCE |
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struct ata_force_param { |
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const char *name; |
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u8 cbl; |
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u8 spd_limit; |
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unsigned long xfer_mask; |
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unsigned int horkage_on; |
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unsigned int horkage_off; |
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u16 lflags; |
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}; |
|
|
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struct ata_force_ent { |
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int port; |
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int device; |
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struct ata_force_param param; |
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}; |
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|
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static struct ata_force_ent *ata_force_tbl; |
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static int ata_force_tbl_size; |
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|
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static char ata_force_param_buf[COMMAND_LINE_SIZE] __initdata; |
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/* param_buf is thrown away after initialization, disallow read */ |
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module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0); |
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MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/admin-guide/kernel-parameters.rst for details)"); |
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#endif |
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|
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static int atapi_enabled = 1; |
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module_param(atapi_enabled, int, 0444); |
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MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])"); |
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|
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static int atapi_dmadir = 0; |
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module_param(atapi_dmadir, int, 0444); |
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MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)"); |
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|
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int atapi_passthru16 = 1; |
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module_param(atapi_passthru16, int, 0444); |
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MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])"); |
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|
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int libata_fua = 0; |
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module_param_named(fua, libata_fua, int, 0444); |
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MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)"); |
|
|
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static int ata_ignore_hpa; |
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module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); |
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MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); |
|
|
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static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA; |
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module_param_named(dma, libata_dma_mask, int, 0444); |
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MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)"); |
|
|
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static int ata_probe_timeout; |
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module_param(ata_probe_timeout, int, 0444); |
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MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); |
|
|
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int libata_noacpi = 0; |
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module_param_named(noacpi, libata_noacpi, int, 0444); |
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MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)"); |
|
|
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int libata_allow_tpm = 0; |
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module_param_named(allow_tpm, libata_allow_tpm, int, 0444); |
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MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)"); |
|
|
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static int atapi_an; |
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module_param(atapi_an, int, 0444); |
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MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)"); |
|
|
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MODULE_AUTHOR("Jeff Garzik"); |
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MODULE_DESCRIPTION("Library module for ATA devices"); |
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MODULE_LICENSE("GPL"); |
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MODULE_VERSION(DRV_VERSION); |
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|
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static inline bool ata_dev_print_info(struct ata_device *dev) |
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{ |
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struct ata_eh_context *ehc = &dev->link->eh_context; |
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|
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return ehc->i.flags & ATA_EHI_PRINTINFO; |
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} |
|
|
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static bool ata_sstatus_online(u32 sstatus) |
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{ |
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return (sstatus & 0xf) == 0x3; |
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} |
|
|
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/** |
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* ata_link_next - link iteration helper |
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* @link: the previous link, NULL to start |
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* @ap: ATA port containing links to iterate |
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* @mode: iteration mode, one of ATA_LITER_* |
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* |
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* LOCKING: |
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* Host lock or EH context. |
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* |
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* RETURNS: |
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* Pointer to the next link. |
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*/ |
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struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap, |
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enum ata_link_iter_mode mode) |
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{ |
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BUG_ON(mode != ATA_LITER_EDGE && |
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mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST); |
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|
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/* NULL link indicates start of iteration */ |
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if (!link) |
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switch (mode) { |
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case ATA_LITER_EDGE: |
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case ATA_LITER_PMP_FIRST: |
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if (sata_pmp_attached(ap)) |
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return ap->pmp_link; |
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fallthrough; |
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case ATA_LITER_HOST_FIRST: |
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return &ap->link; |
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} |
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|
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/* we just iterated over the host link, what's next? */ |
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if (link == &ap->link) |
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switch (mode) { |
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case ATA_LITER_HOST_FIRST: |
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if (sata_pmp_attached(ap)) |
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return ap->pmp_link; |
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fallthrough; |
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case ATA_LITER_PMP_FIRST: |
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if (unlikely(ap->slave_link)) |
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return ap->slave_link; |
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fallthrough; |
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case ATA_LITER_EDGE: |
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return NULL; |
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} |
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|
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/* slave_link excludes PMP */ |
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if (unlikely(link == ap->slave_link)) |
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return NULL; |
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|
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/* we were over a PMP link */ |
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if (++link < ap->pmp_link + ap->nr_pmp_links) |
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return link; |
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|
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if (mode == ATA_LITER_PMP_FIRST) |
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return &ap->link; |
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|
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return NULL; |
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} |
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EXPORT_SYMBOL_GPL(ata_link_next); |
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|
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/** |
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* ata_dev_next - device iteration helper |
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* @dev: the previous device, NULL to start |
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* @link: ATA link containing devices to iterate |
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* @mode: iteration mode, one of ATA_DITER_* |
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* |
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* LOCKING: |
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* Host lock or EH context. |
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* |
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* RETURNS: |
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* Pointer to the next device. |
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*/ |
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struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link, |
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enum ata_dev_iter_mode mode) |
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{ |
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BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE && |
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mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE); |
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|
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/* NULL dev indicates start of iteration */ |
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if (!dev) |
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switch (mode) { |
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case ATA_DITER_ENABLED: |
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case ATA_DITER_ALL: |
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dev = link->device; |
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goto check; |
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case ATA_DITER_ENABLED_REVERSE: |
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case ATA_DITER_ALL_REVERSE: |
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dev = link->device + ata_link_max_devices(link) - 1; |
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goto check; |
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} |
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|
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next: |
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/* move to the next one */ |
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switch (mode) { |
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case ATA_DITER_ENABLED: |
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case ATA_DITER_ALL: |
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if (++dev < link->device + ata_link_max_devices(link)) |
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goto check; |
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return NULL; |
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case ATA_DITER_ENABLED_REVERSE: |
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case ATA_DITER_ALL_REVERSE: |
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if (--dev >= link->device) |
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goto check; |
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return NULL; |
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} |
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|
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check: |
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if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) && |
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!ata_dev_enabled(dev)) |
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goto next; |
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return dev; |
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} |
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EXPORT_SYMBOL_GPL(ata_dev_next); |
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|
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/** |
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* ata_dev_phys_link - find physical link for a device |
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* @dev: ATA device to look up physical link for |
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* |
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* Look up physical link which @dev is attached to. Note that |
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* this is different from @dev->link only when @dev is on slave |
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* link. For all other cases, it's the same as @dev->link. |
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* |
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* LOCKING: |
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* Don't care. |
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* |
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* RETURNS: |
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* Pointer to the found physical link. |
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*/ |
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struct ata_link *ata_dev_phys_link(struct ata_device *dev) |
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{ |
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struct ata_port *ap = dev->link->ap; |
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|
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if (!ap->slave_link) |
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return dev->link; |
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if (!dev->devno) |
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return &ap->link; |
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return ap->slave_link; |
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} |
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|
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#ifdef CONFIG_ATA_FORCE |
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/** |
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* ata_force_cbl - force cable type according to libata.force |
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* @ap: ATA port of interest |
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* |
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* Force cable type according to libata.force and whine about it. |
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* The last entry which has matching port number is used, so it |
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* can be specified as part of device force parameters. For |
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* example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the |
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* same effect. |
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* |
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* LOCKING: |
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* EH context. |
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*/ |
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void ata_force_cbl(struct ata_port *ap) |
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{ |
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int i; |
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|
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for (i = ata_force_tbl_size - 1; i >= 0; i--) { |
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const struct ata_force_ent *fe = &ata_force_tbl[i]; |
|
|
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if (fe->port != -1 && fe->port != ap->print_id) |
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continue; |
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|
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if (fe->param.cbl == ATA_CBL_NONE) |
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continue; |
|
|
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ap->cbl = fe->param.cbl; |
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ata_port_notice(ap, "FORCE: cable set to %s\n", fe->param.name); |
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return; |
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} |
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} |
|
|
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/** |
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* ata_force_link_limits - force link limits according to libata.force |
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* @link: ATA link of interest |
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* |
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* Force link flags and SATA spd limit according to libata.force |
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* and whine about it. When only the port part is specified |
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* (e.g. 1:), the limit applies to all links connected to both |
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* the host link and all fan-out ports connected via PMP. If the |
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* device part is specified as 0 (e.g. 1.00:), it specifies the |
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* first fan-out link not the host link. Device number 15 always |
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* points to the host link whether PMP is attached or not. If the |
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* controller has slave link, device number 16 points to it. |
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* |
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* LOCKING: |
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* EH context. |
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*/ |
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static void ata_force_link_limits(struct ata_link *link) |
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{ |
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bool did_spd = false; |
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int linkno = link->pmp; |
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int i; |
|
|
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if (ata_is_host_link(link)) |
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linkno += 15; |
|
|
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for (i = ata_force_tbl_size - 1; i >= 0; i--) { |
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const struct ata_force_ent *fe = &ata_force_tbl[i]; |
|
|
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if (fe->port != -1 && fe->port != link->ap->print_id) |
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continue; |
|
|
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if (fe->device != -1 && fe->device != linkno) |
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continue; |
|
|
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/* only honor the first spd limit */ |
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if (!did_spd && fe->param.spd_limit) { |
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link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1; |
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ata_link_notice(link, "FORCE: PHY spd limit set to %s\n", |
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fe->param.name); |
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did_spd = true; |
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} |
|
|
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/* let lflags stack */ |
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if (fe->param.lflags) { |
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link->flags |= fe->param.lflags; |
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ata_link_notice(link, |
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"FORCE: link flag 0x%x forced -> 0x%x\n", |
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fe->param.lflags, link->flags); |
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} |
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} |
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} |
|
|
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/** |
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* ata_force_xfermask - force xfermask according to libata.force |
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* @dev: ATA device of interest |
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* |
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* Force xfer_mask according to libata.force and whine about it. |
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* For consistency with link selection, device number 15 selects |
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* the first device connected to the host link. |
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* |
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* LOCKING: |
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* EH context. |
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*/ |
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static void ata_force_xfermask(struct ata_device *dev) |
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{ |
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int devno = dev->link->pmp + dev->devno; |
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int alt_devno = devno; |
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int i; |
|
|
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/* allow n.15/16 for devices attached to host port */ |
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if (ata_is_host_link(dev->link)) |
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alt_devno += 15; |
|
|
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for (i = ata_force_tbl_size - 1; i >= 0; i--) { |
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const struct ata_force_ent *fe = &ata_force_tbl[i]; |
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unsigned long pio_mask, mwdma_mask, udma_mask; |
|
|
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if (fe->port != -1 && fe->port != dev->link->ap->print_id) |
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continue; |
|
|
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if (fe->device != -1 && fe->device != devno && |
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fe->device != alt_devno) |
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continue; |
|
|
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if (!fe->param.xfer_mask) |
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continue; |
|
|
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ata_unpack_xfermask(fe->param.xfer_mask, |
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&pio_mask, &mwdma_mask, &udma_mask); |
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if (udma_mask) |
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dev->udma_mask = udma_mask; |
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else if (mwdma_mask) { |
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dev->udma_mask = 0; |
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dev->mwdma_mask = mwdma_mask; |
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} else { |
|
dev->udma_mask = 0; |
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dev->mwdma_mask = 0; |
|
dev->pio_mask = pio_mask; |
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} |
|
|
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ata_dev_notice(dev, "FORCE: xfer_mask set to %s\n", |
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fe->param.name); |
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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. |
|
*/ |
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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) && |
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!(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 |
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static inline void ata_force_link_limits(struct ata_link *link) { } |
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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. |
|
* |
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* LOCKING: |
|
* None. |
|
* |
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* 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; |
|
fallthrough; |
|
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, |
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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_ENABLE && |
|
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) |
|
{ |
|
bool print_info = ata_dev_print_info(dev); |
|
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 */ |
|
fallthrough; |
|
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) { |
|
if (dma) { |
|
dev->horkage |= ATA_HORKAGE_NO_DMA_LOG; |
|
goto retry; |
|
} |
|
ata_dev_err(dev, "Read log page 0x%02x failed, Emask 0x%x\n", |
|
(unsigned int)page, 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) |
|
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) { |
|
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) { |
|
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; |
|
|
|
err_mask = ata_read_log_page(dev, |
|
ATA_LOG_IDENTIFY_DEVICE, |
|
ATA_LOG_SATA_SETTINGS, |
|
ap->sector_buf, |
|
1); |
|
if (err_mask) |
|
goto not_supported; |
|
|
|
if (!(ap->sector_buf[ATA_LOG_NCQ_PRIO_OFFSET] & BIT(3))) |
|
goto not_supported; |
|
|
|
dev->flags |= ATA_DFLAG_NCQ_PRIO; |
|
|
|
return; |
|
|
|
not_supported: |
|
dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE; |
|
dev->flags &= ~ATA_DFLAG_NCQ_PRIO; |
|
} |
|
|
|
static bool ata_dev_check_adapter(struct ata_device *dev, |
|
unsigned short vendor_id) |
|
{ |
|
struct pci_dev *pcidev = NULL; |
|
struct device *parent_dev = NULL; |
|
|
|
for (parent_dev = dev->tdev.parent; parent_dev != NULL; |
|
parent_dev = parent_dev->parent) { |
|
if (dev_is_pci(parent_dev)) { |
|
pcidev = to_pci_dev(parent_dev); |
|
if (pcidev->vendor == vendor_id) |
|
return true; |
|
break; |
|
} |
|
} |
|
|
|
return false; |
|
} |
|
|
|
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 (dev->horkage & ATA_HORKAGE_NO_NCQ_ON_ATI && |
|
ata_dev_check_adapter(dev, PCI_VENDOR_ID_ATI)) { |
|
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) |
|
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; |
|
} |
|
|
|
static int ata_dev_config_lba(struct ata_device *dev) |
|
{ |
|
struct ata_port *ap = dev->link->ap; |
|
const u16 *id = dev->id; |
|
const char *lba_desc; |
|
char ncq_desc[24]; |
|
int ret; |
|
|
|
dev->flags |= ATA_DFLAG_LBA; |
|
|
|
if (ata_id_has_lba48(id)) { |
|
lba_desc = "LBA48"; |
|
dev->flags |= ATA_DFLAG_LBA48; |
|
if (dev->n_sectors >= (1UL << 28) && |
|
ata_id_has_flush_ext(id)) |
|
dev->flags |= ATA_DFLAG_FLUSH_EXT; |
|
} else { |
|
lba_desc = "LBA"; |
|
} |
|
|
|
/* config NCQ */ |
|
ret = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); |
|
|
|
/* print device info to dmesg */ |
|
if (ata_msg_drv(ap) && ata_dev_print_info(dev)) |
|
ata_dev_info(dev, |
|
"%llu sectors, multi %u: %s %s\n", |
|
(unsigned long long)dev->n_sectors, |
|
dev->multi_count, lba_desc, ncq_desc); |
|
|
|
return ret; |
|
} |
|
|
|
static void ata_dev_config_chs(struct ata_device *dev) |
|
{ |
|
struct ata_port *ap = dev->link->ap; |
|
const u16 *id = dev->id; |
|
|
|
if (ata_id_current_chs_valid(id)) { |
|
/* Current CHS translation is valid. */ |
|
dev->cylinders = id[54]; |
|
dev->heads = id[55]; |
|
dev->sectors = id[56]; |
|
} else { |
|
/* Default translation */ |
|
dev->cylinders = id[1]; |
|
dev->heads = id[3]; |
|
dev->sectors = id[6]; |
|
} |
|
|
|
/* print device info to dmesg */ |
|
if (ata_msg_drv(ap) && ata_dev_print_info(dev)) |
|
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); |
|
} |
|
|
|
static void ata_dev_config_devslp(struct ata_device *dev) |
|
{ |
|
u8 *sata_setting = dev->link->ap->sector_buf; |
|
unsigned int err_mask; |
|
int i, j; |
|
|
|
/* |
|
* Check device sleep capability. Get DevSlp timing variables |
|
* from SATA Settings page of Identify Device Data Log. |
|
*/ |
|
if (!ata_id_has_devslp(dev->id)) |
|
return; |
|
|
|
err_mask = ata_read_log_page(dev, |
|
ATA_LOG_IDENTIFY_DEVICE, |
|
ATA_LOG_SATA_SETTINGS, |
|
sata_setting, 1); |
|
if (err_mask) |
|
return; |
|
|
|
dev->flags |= ATA_DFLAG_DEVSLP; |
|
for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) { |
|
j = ATA_LOG_DEVSLP_OFFSET + i; |
|
dev->devslp_timing[i] = sata_setting[j]; |
|
} |
|
} |
|
|
|
static void ata_dev_print_features(struct ata_device *dev) |
|
{ |
|
if (!(dev->flags & ATA_DFLAG_FEATURES_MASK)) |
|
return; |
|
|
|
ata_dev_info(dev, |
|
"Features:%s%s%s%s%s\n", |
|
dev->flags & ATA_DFLAG_TRUSTED ? " Trust" : "", |
|
dev->flags & ATA_DFLAG_DA ? " Dev-Attention" : "", |
|
dev->flags & ATA_DFLAG_DEVSLP ? " Dev-Sleep" : "", |
|
dev->flags & ATA_DFLAG_NCQ_SEND_RECV ? " NCQ-sndrcv" : "", |
|
dev->flags & ATA_DFLAG_NCQ_PRIO ? " NCQ-prio" : ""); |
|
} |
|
|
|
/** |
|
* 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; |
|
bool print_info = ata_dev_print_info(dev); |
|
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; |
|
} |
|
|
|
/* 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)); |
|
|
|
if (ata_id_has_lba(id)) { |
|
rc = ata_dev_config_lba(dev); |
|
if (rc) |
|
return rc; |
|
} else { |
|
ata_dev_config_chs(dev); |
|
} |
|
|
|
ata_dev_config_devslp(dev); |
|
ata_dev_config_sense_reporting(dev); |
|
ata_dev_config_zac(dev); |
|
ata_dev_config_trusted(dev); |
|
dev->cdb_len = 32; |
|
|
|
if (ata_msg_drv(ap) && print_info) |
|
ata_dev_print_features(dev); |
|
} |
|
|
|
/* 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); |
|
fallthrough; |
|
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; |
|
fallthrough; |
|
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 = ""; |
|
int ign_dev_err = 0; |
|
unsigned int err_mask = 0; |
|
int rc; |
|
|
|
dev->flags &= ~ATA_DFLAG_PIO; |
|
if (dev->xfer_shift == ATA_SHIFT_PIO) |
|
dev->flags |= ATA_DFLAG_PIO; |
|
|
|
if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id)) |
|
dev_err_whine = " (SET_XFERMODE skipped)"; |
|
else { |
|
if (nosetxfer) |
|
ata_dev_warn(dev, |
|
"NOSETXFER but PATA detected - can't " |
|
"skip SETXFER, might malfunction\n"); |
|
err_mask = ata_dev_set_xfermode(dev); |
|
} |
|
|
|
if (err_mask & ~AC_ERR_DEV) |
|
goto fail; |
|
|
|
/* revalidate */ |
|
ehc->i.flags |= ATA_EHI_POST_SETMODE; |
|
rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0); |
|
ehc->i.flags &= ~ATA_EHI_POST_SETMODE; |
|
if (rc) |
|
return rc; |
|
|
|
if (dev->xfer_shift == ATA_SHIFT_PIO) { |
|
/* Old CFA may refuse this command, which is just fine */ |
|
if (ata_id_is_cfa(dev->id)) |
|
ign_dev_err = 1; |
|
/* Catch several broken garbage emulations plus some pre |
|
ATA devices */ |
|
if (ata_id_major_version(dev->id) == 0 && |
|
dev->pio_mode <= XFER_PIO_2) |
|
ign_dev_err = 1; |
|
/* Some very old devices and some bad newer ones fail |
|
any kind of SET_XFERMODE request but support PIO0-2 |
|
timings and no IORDY */ |
|
if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2) |
|
ign_dev_err = 1; |
|
} |
|
/* Early MWDMA devices do DMA but don't allow DMA mode setting. |
|
Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */ |
|
if (dev->xfer_shift == ATA_SHIFT_MWDMA && |
|
dev->dma_mode == XFER_MW_DMA_0 && |
|
(dev->id[63] >> 8) & 1) |
|
ign_dev_err = 1; |
|
|
|
/* if the device is actually configured correctly, ignore dev err */ |
|
if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id))) |
|
ign_dev_err = 1; |
|
|
|
if (err_mask & AC_ERR_DEV) { |
|
if (!ign_dev_err) |
|
goto fail; |
|
else |
|
dev_err_whine = " (device error ignored)"; |
|
} |
|
|
|
DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", |
|
dev->xfer_shift, (int)dev->xfer_mode); |
|
|
|
if (!(ehc->i.flags & ATA_EHI_QUIET) || |
|
ehc->i.flags & ATA_EHI_DID_HARDRESET) |
|
ata_dev_info(dev, "configured for %s%s\n", |
|
ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)), |
|
dev_err_whine); |
|
|
|
return 0; |
|
|
|
fail: |
|
ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask); |
|
return -EIO; |
|
} |
|
|
|
/** |
|
* ata_do_set_mode - Program timings and issue SET FEATURES - XFER |
|
* @link: link on which timings will be programmed |
|
* @r_failed_dev: out parameter for failed device |
|
* |
|
* Standard implementation of the function used to tune and set |
|
* ATA device disk transfer mode (PIO3, UDMA6, etc.). If |
|
* ata_dev_set_mode() fails, pointer to the failing device is |
|
* returned in @r_failed_dev. |
|
* |
|
* LOCKING: |
|
* PCI/etc. bus probe sem. |
|
* |
|
* RETURNS: |
|
* 0 on success, negative errno otherwise |
|
*/ |
|
|
|
int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) |
|
{ |
|
struct ata_port *ap = link->ap; |
|
struct ata_device *dev; |
|
int rc = 0, used_dma = 0, found = 0; |
|
|
|
/* step 1: calculate xfer_mask */ |
|
ata_for_each_dev(dev, link, ENABLED) { |
|
unsigned long pio_mask, dma_mask; |
|
unsigned int mode_mask; |
|
|
|
mode_mask = ATA_DMA_MASK_ATA; |
|
if (dev->class == ATA_DEV_ATAPI) |
|
mode_mask = ATA_DMA_MASK_ATAPI; |
|
else if (ata_id_is_cfa(dev->id)) |
|
mode_mask = ATA_DMA_MASK_CFA; |
|
|
|
ata_dev_xfermask(dev); |
|
ata_force_xfermask(dev); |
|
|
|
pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); |
|
|
|
if (libata_dma_mask & mode_mask) |
|
dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, |
|
dev->udma_mask); |
|
else |
|
dma_mask = 0; |
|
|
|
dev->pio_mode = ata_xfer_mask2mode(pio_mask); |
|
dev->dma_mode = ata_xfer_mask2mode(dma_mask); |
|
|
|
found = 1; |
|
if (ata_dma_enabled(dev)) |
|
used_dma = 1; |
|
} |
|
if (!found) |
|
goto out; |
|
|
|
/* step 2: always set host PIO timings */ |
|
ata_for_each_dev(dev, link, ENABLED) { |
|
if (dev->pio_mode == 0xff) { |
|
ata_dev_warn(dev, "no PIO support\n"); |
|
rc = -EINVAL; |
|
goto out; |
|
} |
|
|
|
dev->xfer_mode = dev->pio_mode; |
|
dev->xfer_shift = ATA_SHIFT_PIO; |
|
if (ap->ops->set_piomode) |
|
ap->ops->set_piomode(ap, dev); |
|
} |
|
|
|
/* step 3: set host DMA timings */ |
|
ata_for_each_dev(dev, link, ENABLED) { |
|
if (!ata_dma_enabled(dev)) |
|
continue; |
|
|
|
dev->xfer_mode = dev->dma_mode; |
|
dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); |
|
if (ap->ops->set_dmamode) |
|
ap->ops->set_dmamode(ap, dev); |
|
} |
|
|
|
/* step 4: update devices' xfer mode */ |
|
ata_for_each_dev(dev, link, ENABLED) { |
|
rc = ata_dev_set_mode(dev); |
|
if (rc) |
|
goto out; |
|
} |
|
|
|
/* Record simplex status. If we selected DMA then the other |
|
* host channels are not permitted to do so. |
|
*/ |
|
if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) |
|
ap->host->simplex_claimed = ap; |
|
|
|
out: |
|
if (rc) |
|
*r_failed_dev = dev; |
|
return rc; |
|
} |
|
EXPORT_SYMBOL_GPL(ata_do_set_mode); |
|
|
|
/** |
|
* ata_wait_ready - wait for link to become ready |
|
* @link: link to be waited on |
|
* @deadline: deadline jiffies for the operation |
|
* @check_ready: callback to check link readiness |
|
* |
|
* Wait for @link to become ready. @check_ready should return |
|
* positive number if @link is ready, 0 if it isn't, -ENODEV if |
|
* link doesn't seem to be occupied, other errno for other error |
|
* conditions. |
|
* |
|
* Transient -ENODEV conditions are allowed for |
|
* ATA_TMOUT_FF_WAIT. |
|
* |
|
* LOCKING: |
|
* EH context. |
|
* |
|
* RETURNS: |
|
* 0 if @link is ready before @deadline; otherwise, -errno. |
|
*/ |
|
int ata_wait_ready(struct ata_link *link, unsigned long deadline, |
|
int (*check_ready)(struct ata_link *link)) |
|
{ |
|
unsigned long start = jiffies; |
|
unsigned long nodev_deadline; |
|
int warned = 0; |
|
|
|
/* choose which 0xff timeout to use, read comment in libata.h */ |
|
if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN) |
|
nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG); |
|
else |
|
nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT); |
|
|
|
/* Slave readiness can't be tested separately from master. On |
|
* M/S emulation configuration, this function should be called |
|
* only on the master and it will handle both master and slave. |
|
*/ |
|
WARN_ON(link == link->ap->slave_link); |
|
|
|
if (time_after(nodev_deadline, deadline)) |
|
nodev_deadline = deadline; |
|
|
|
while (1) { |
|
unsigned long now = jiffies; |
|
int ready, tmp; |
|
|
|
ready = tmp = check_ready(link); |
|
if (ready > 0) |
|
return 0; |
|
|
|
/* |
|
* -ENODEV could be transient. Ignore -ENODEV if link |
|
* is online. Also, some SATA devices take a long |
|
* time to clear 0xff after reset. Wait for |
|
* ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't |
|
* offline. |
|
* |
|
* Note that some PATA controllers (pata_ali) explode |
|
* if status register is read more than once when |
|
* there's no device attached. |
|
*/ |
|
if (ready == -ENODEV) { |
|
if (ata_link_online(link)) |
|
ready = 0; |
|
else if ((link->ap->flags & ATA_FLAG_SATA) && |
|
!ata_link_offline(link) && |
|
time_before(now, nodev_deadline)) |
|
ready = 0; |
|
} |
|
|
|
if (ready) |
|
return ready; |
|
if (time_after(now, deadline)) |
|
return -EBUSY; |
|
|
|
if (!warned && time_after(now, start + 5 * HZ) && |
|
(deadline - now > 3 * HZ)) { |
|
ata_link_warn(link, |
|
"link is slow to respond, please be patient " |
|
"(ready=%d)\n", tmp); |
|
warned = 1; |
|
} |
|
|
|
ata_msleep(link->ap, 50); |
|
} |
|
} |
|
|
|
/** |
|
* ata_wait_after_reset - wait for link to become ready after reset |
|
* @link: link to be waited on |
|
* @deadline: deadline jiffies for the operation |
|
* @check_ready: callback to check link readiness |
|
* |
|
* Wait for @link to become ready after reset. |
|
* |
|
* LOCKING: |
|
* EH context. |
|
* |
|
* RETURNS: |
|
* 0 if @link is ready before @deadline; otherwise, -errno. |
|
*/ |
|
int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, |
|
int (*check_ready)(struct ata_link *link)) |
|
{ |
|
ata_msleep(link->ap, ATA_WAIT_AFTER_RESET); |
|
|
|
return ata_wait_ready(link, deadline, check_ready); |
|
} |
|
EXPORT_SYMBOL_GPL(ata_wait_after_reset); |
|
|
|
/** |
|
* ata_std_prereset - prepare for reset |
|
* @link: ATA link to be reset |
|
* @deadline: deadline jiffies for the operation |
|
* |
|
* @link is about to be reset. Initialize it. Failure from |
|
* prereset makes libata abort whole reset sequence and give up |
|
* that port, so prereset should be best-effort. It does its |
|
* best to prepare for reset sequence but if things go wrong, it |
|
* should just whine, not fail. |
|
* |
|
* LOCKING: |
|
* Kernel thread context (may sleep) |
|
* |
|
* RETURNS: |
|
* 0 on success, -errno otherwise. |
|
*/ |
|
int ata_std_prereset(struct ata_link *link, unsigned long deadline) |
|
{ |
|
struct ata_port *ap = link->ap; |
|
struct ata_eh_context *ehc = &link->eh_context; |
|
const unsigned long *timing = sata_ehc_deb_timing(ehc); |
|
int rc; |
|
|
|
/* if we're about to do hardreset, nothing more to do */ |
|
if (ehc->i.action & ATA_EH_HARDRESET) |
|
return 0; |
|
|
|
/* if SATA, resume link */ |
|
if (ap->flags & ATA_FLAG_SATA) { |
|
rc = sata_link_resume(link, timing, deadline); |
|
/* whine about phy resume failure but proceed */ |
|
if (rc && rc != -EOPNOTSUPP) |
|
ata_link_warn(link, |
|
"failed to resume link for reset (errno=%d)\n", |
|
rc); |
|
} |
|
|
|
/* no point in trying softreset on offline link */ |
|
if (ata_phys_link_offline(link)) |
|
ehc->i.action &= ~ATA_EH_SOFTRESET; |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL_GPL(ata_std_prereset); |
|
|
|
/** |
|
* sata_std_hardreset - COMRESET w/o waiting or classification |
|
* @link: link to reset |
|
* @class: resulting class of attached device |
|
* @deadline: deadline jiffies for the operation |
|
* |
|
* Standard SATA COMRESET w/o waiting or classification. |
|
* |
|
* LOCKING: |
|
* Kernel thread context (may sleep) |
|
* |
|
* RETURNS: |
|
* 0 if link offline, -EAGAIN if link online, -errno on errors. |
|
*/ |
|
int sata_std_hardreset(struct ata_link *link, unsigned int *class, |
|
unsigned long deadline) |
|
{ |
|
const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); |
|
bool online; |
|
int rc; |
|
|
|
/* do hardreset */ |
|
rc = sata_link_hardreset(link, timing, deadline, &online, NULL); |
|
return online ? -EAGAIN : rc; |
|
} |
|
EXPORT_SYMBOL_GPL(sata_std_hardreset); |
|
|
|
/** |
|
* ata_std_postreset - standard postreset callback |
|
* @link: the target ata_link |
|
* @classes: classes of attached devices |
|
* |
|
* This function is invoked after a successful reset. Note that |
|
* the device might have been reset more than once using |
|
* different reset methods before postreset is invoked. |
|
* |
|
* LOCKING: |
|
* Kernel thread context (may sleep) |
|
*/ |
|
void ata_std_postreset(struct ata_link *link, unsigned int *classes) |
|
{ |
|
u32 serror; |
|
|
|
DPRINTK("ENTER\n"); |
|
|
|
/* reset complete, clear SError */ |
|
if (!sata_scr_read(link, SCR_ERROR, &serror)) |
|
sata_scr_write(link, SCR_ERROR, serror); |
|
|
|
/* print link status */ |
|
sata_print_link_status(link); |
|
|
|
DPRINTK("EXIT\n"); |
|
} |
|
EXPORT_SYMBOL_GPL(ata_std_postreset); |
|
|
|
/** |
|
* ata_dev_same_device - Determine whether new ID matches configured device |
|
* @dev: device to compare against |
|
* @new_class: class of the new device |
|
* @new_id: IDENTIFY page of the new device |
|
* |
|
* Compare @new_class and @new_id against @dev and determine |
|
* whether @dev is the device indicated by @new_class and |
|
* @new_id. |
|
* |
|
* LOCKING: |
|
* None. |
|
* |
|
* RETURNS: |
|
* 1 if @dev matches @new_class and @new_id, 0 otherwise. |
|
*/ |
|
static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, |
|
const u16 *new_id) |
|
{ |
|
const u16 *old_id = dev->id; |
|
unsigned char model[2][ATA_ID_PROD_LEN + 1]; |
|
unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; |
|
|
|
if (dev->class != new_class) { |
|
ata_dev_info(dev, "class mismatch %d != %d\n", |
|
dev->class, new_class); |
|
return 0; |
|
} |
|
|
|
ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); |
|
ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); |
|
ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); |
|
ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); |
|
|
|
if (strcmp(model[0], model[1])) { |
|
ata_dev_info(dev, "model number mismatch '%s' != '%s'\n", |
|
model[0], model[1]); |
|
return 0; |
|
} |
|
|
|
if (strcmp(serial[0], serial[1])) { |
|
ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n", |
|
serial[0], serial[1]); |
|
return 0; |
|
} |
|
|
|
return 1; |
|
} |
|
|
|
/** |
|
* ata_dev_reread_id - Re-read IDENTIFY data |
|
* @dev: target ATA device |
|
* @readid_flags: read ID flags |
|
* |
|
* Re-read IDENTIFY page and make sure @dev is still attached to |
|
* the port. |
|
* |
|
* LOCKING: |
|
* Kernel thread context (may sleep) |
|
* |
|
* RETURNS: |
|
* 0 on success, negative errno otherwise |
|
*/ |
|
int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) |
|
{ |
|
unsigned int class = dev->class; |
|
u16 *id = (void *)dev->link->ap->sector_buf; |
|
int rc; |
|
|
|
/* read ID data */ |
|
rc = ata_dev_read_id(dev, &class, readid_flags, id); |
|
if (rc) |
|
return rc; |
|
|
|
/* is the device still there? */ |
|
if (!ata_dev_same_device(dev, class, id)) |
|
return -ENODEV; |
|
|
|
memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); |
|
return 0; |
|
} |
|
|
|
/** |
|
* ata_dev_revalidate - Revalidate ATA device |
|
* @dev: device to revalidate |
|
* @new_class: new class code |
|
* @readid_flags: read ID flags |
|
* |
|
* Re-read IDENTIFY page, make sure @dev is still attached to the |
|
* port and reconfigure it according to the new IDENTIFY page. |
|
* |
|
* LOCKING: |
|
* Kernel thread context (may sleep) |
|
* |
|
* RETURNS: |
|
* 0 on success, negative errno otherwise |
|
*/ |
|
int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, |
|
unsigned int readid_flags) |
|
{ |
|
u64 n_sectors = dev->n_sectors; |
|
u64 n_native_sectors = dev->n_native_sectors; |
|
int rc; |
|
|
|
if (!ata_dev_enabled(dev)) |
|
return -ENODEV; |
|
|
|
/* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */ |
|
if (ata_class_enabled(new_class) && |
|
new_class != ATA_DEV_ATA && |
|
new_class != ATA_DEV_ATAPI && |
|
new_class != ATA_DEV_ZAC && |
|
new_class != ATA_DEV_SEMB) { |
|
ata_dev_info(dev, "class mismatch %u != %u\n", |
|
dev->class, new_class); |
|
rc = -ENODEV; |
|
goto fail; |
|
} |
|
|
|
/* re-read ID */ |
|
rc = ata_dev_reread_id(dev, readid_flags); |
|
if (rc) |
|
goto fail; |
|
|
|
/* configure device according to the new ID */ |
|
rc = ata_dev_configure(dev); |
|
if (rc) |
|
goto fail; |
|
|
|
/* verify n_sectors hasn't changed */ |
|
if (dev->class != ATA_DEV_ATA || !n_sectors || |
|
dev->n_sectors == n_sectors) |
|
return 0; |
|
|
|
/* n_sectors has changed */ |
|
ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n", |
|
(unsigned long long)n_sectors, |
|
(unsigned long long)dev->n_sectors); |
|
|
|
/* |
|
* Something could have caused HPA to be unlocked |
|
* involuntarily. If n_native_sectors hasn't changed and the |
|
* new size matches it, keep the device. |
|
*/ |
|
if (dev->n_native_sectors == n_native_sectors && |
|
dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) { |
|
ata_dev_warn(dev, |
|
"new n_sectors matches native, probably " |
|
"late HPA unlock, n_sectors updated\n"); |
|
/* use the larger n_sectors */ |
|
return 0; |
|
} |
|
|
|
/* |
|
* Some BIOSes boot w/o HPA but resume w/ HPA locked. Try |
|
* unlocking HPA in those cases. |
|
* |
|
* https://bugzilla.kernel.org/show_bug.cgi?id=15396 |
|
*/ |
|
if (dev->n_native_sectors == n_native_sectors && |
|
dev->n_sectors < n_sectors && n_sectors == n_native_sectors && |
|
!(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) { |
|
ata_dev_warn(dev, |
|
"old n_sectors matches native, probably " |
|
"late HPA lock, will try to unlock HPA\n"); |
|
/* try unlocking HPA */ |
|
dev->flags |= ATA_DFLAG_UNLOCK_HPA; |
|
rc = -EIO; |
|
} else |
|
rc = -ENODEV; |
|
|
|
/* restore original n_[native_]sectors and fail */ |
|
dev->n_native_sectors = n_native_sectors; |
|
dev->n_sectors = n_sectors; |
|
fail: |
|
ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc); |
|
return rc; |
|
} |
|
|
|
struct ata_blacklist_entry { |
|
const char *model_num; |
|
const char *model_rev; |
|
unsigned long horkage; |
|
}; |
|
|
|
static const struct ata_blacklist_entry ata_device_blacklist [] = { |
|
/* Devices with DMA related problems under Linux */ |
|
{ "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, |
|
{ "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, |
|
{ "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, |
|
{ "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, |
|
{ "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, |
|
{ "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, |
|
{ "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, |
|
{ "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, |
|
{ "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, |
|
{ "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA }, |
|
{ "CRD-84", NULL, ATA_HORKAGE_NODMA }, |
|
{ "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, |
|
{ "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, |
|
{ "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, |
|
{ "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, |
|
{ "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA }, |
|
{ "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, |
|
{ "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, |
|
{ "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, |
|
{ "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, |
|
{ "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, |
|
{ "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, |
|
{ "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, |
|
{ "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, |
|
{ "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, |
|
{ "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, |
|
{ "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA }, |
|
{ "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, |
|
{ " 2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA }, |
|
{ "VRFDFC22048UCHC-TE*", NULL, ATA_HORKAGE_NODMA }, |
|
/* Odd clown on sil3726/4726 PMPs */ |
|
{ "Config Disk", NULL, ATA_HORKAGE_DISABLE }, |
|
|
|
/* Weird ATAPI devices */ |
|
{ "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, |
|
{ "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA }, |
|
{ "Slimtype DVD A DS8A8SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 }, |
|
{ "Slimtype DVD A DS8A9SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 }, |
|
|
|
/* |
|
* Causes silent data corruption with higher max sects. |
|
* http://lkml.kernel.org/g/[email protected] |
|
*/ |
|
{ "ST380013AS", "3.20", ATA_HORKAGE_MAX_SEC_1024 }, |
|
|
|
/* |
|
* These devices time out with higher max sects. |
|
* https://bugzilla.kernel.org/show_bug.cgi?id=121671 |
|
*/ |
|
{ "LITEON CX1-JB*-HP", NULL, ATA_HORKAGE_MAX_SEC_1024 }, |
|
{ "LITEON EP1-*", NULL, ATA_HORKAGE_MAX_SEC_1024 }, |
|
|
|
/* Devices we expect to fail diagnostics */ |
|
|
|
/* Devices where NCQ should be avoided */ |
|
/* NCQ is slow */ |
|
{ "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, |
|
{ "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, |
|
/* http://thread.gmane.org/gmane.linux.ide/14907 */ |
|
{ "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, |
|
/* NCQ is broken */ |
|
{ "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ }, |
|
{ "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ }, |
|
{ "ST380817AS", "3.42", ATA_HORKAGE_NONCQ }, |
|
{ "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ }, |
|
{ "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ }, |
|
|
|
/* Seagate NCQ + FLUSH CACHE firmware bug */ |
|
{ "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | |
|
ATA_HORKAGE_FIRMWARE_WARN }, |
|
|
|
{ "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | |
|
ATA_HORKAGE_FIRMWARE_WARN }, |
|
|
|
{ "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | |
|
ATA_HORKAGE_FIRMWARE_WARN }, |
|
|
|
{ "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | |
|
ATA_HORKAGE_FIRMWARE_WARN }, |
|
|
|
/* drives which fail FPDMA_AA activation (some may freeze afterwards) |
|
the ST disks also have LPM issues */ |
|
{ "ST1000LM024 HN-M101MBB", NULL, ATA_HORKAGE_BROKEN_FPDMA_AA | |
|
ATA_HORKAGE_NOLPM, }, |
|
{ "VB0250EAVER", "HPG7", ATA_HORKAGE_BROKEN_FPDMA_AA }, |
|
|
|
/* Blacklist entries taken from Silicon Image 3124/3132 |
|
Windows driver .inf file - also several Linux problem reports */ |
|
{ "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, |
|
{ "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, |
|
{ "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, |
|
|
|
/* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */ |
|
{ "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, }, |
|
|
|
/* Sandisk SD7/8/9s lock up hard on large trims */ |
|
{ "SanDisk SD[789]*", NULL, ATA_HORKAGE_MAX_TRIM_128M, }, |
|
|
|
/* devices which puke on READ_NATIVE_MAX */ |
|
{ "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, }, |
|
{ "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA }, |
|
{ "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA }, |
|
{ "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA }, |
|
|
|
/* this one allows HPA unlocking but fails IOs on the area */ |
|
{ "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA }, |
|
|
|
/* Devices which report 1 sector over size HPA */ |
|
{ "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, }, |
|
{ "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, }, |
|
{ "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, }, |
|
|
|
/* Devices which get the IVB wrong */ |
|
{ "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, }, |
|
/* Maybe we should just blacklist TSSTcorp... */ |
|
{ "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB, }, |
|
|
|
/* Devices that do not need bridging limits applied */ |
|
{ "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, }, |
|
{ "BUFFALO HD-QSU2/R5", NULL, ATA_HORKAGE_BRIDGE_OK, }, |
|
|
|
/* Devices which aren't very happy with higher link speeds */ |
|
{ "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, }, |
|
{ "Seagate FreeAgent GoFlex", NULL, ATA_HORKAGE_1_5_GBPS, }, |
|
|
|
/* |
|
* Devices which choke on SETXFER. Applies only if both the |
|
* device and controller are SATA. |
|
*/ |
|
{ "PIONEER DVD-RW DVRTD08", NULL, ATA_HORKAGE_NOSETXFER }, |
|
{ "PIONEER DVD-RW DVRTD08A", NULL, ATA_HORKAGE_NOSETXFER }, |
|
{ "PIONEER DVD-RW DVR-215", NULL, ATA_HORKAGE_NOSETXFER }, |
|
{ "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER }, |
|
{ "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER }, |
|
|
|
/* Crucial BX100 SSD 500GB has broken LPM support */ |
|
{ "CT500BX100SSD1", NULL, ATA_HORKAGE_NOLPM }, |
|
|
|
/* 512GB MX100 with MU01 firmware has both queued TRIM and LPM issues */ |
|
{ "Crucial_CT512MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM | |
|
ATA_HORKAGE_ZERO_AFTER_TRIM | |
|
ATA_HORKAGE_NOLPM, }, |
|
/* 512GB MX100 with newer firmware has only LPM issues */ |
|
{ "Crucial_CT512MX100*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM | |
|
ATA_HORKAGE_NOLPM, }, |
|
|
|
/* 480GB+ M500 SSDs have both queued TRIM and LPM issues */ |
|
{ "Crucial_CT480M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | |
|
ATA_HORKAGE_ZERO_AFTER_TRIM | |
|
ATA_HORKAGE_NOLPM, }, |
|
{ "Crucial_CT960M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | |
|
ATA_HORKAGE_ZERO_AFTER_TRIM | |
|
ATA_HORKAGE_NOLPM, }, |
|
|
|
/* These specific Samsung models/firmware-revs do not handle LPM well */ |
|
{ "SAMSUNG MZMPC128HBFU-000MV", "CXM14M1Q", ATA_HORKAGE_NOLPM, }, |
|
{ "SAMSUNG SSD PM830 mSATA *", "CXM13D1Q", ATA_HORKAGE_NOLPM, }, |
|
{ "SAMSUNG MZ7TD256HAFV-000L9", NULL, ATA_HORKAGE_NOLPM, }, |
|
{ "SAMSUNG MZ7TE512HMHP-000L1", "EXT06L0Q", ATA_HORKAGE_NOLPM, }, |
|
|
|
/* devices that don't properly handle queued TRIM commands */ |
|
{ "Micron_M500IT_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM | |
|
ATA_HORKAGE_ZERO_AFTER_TRIM, }, |
|
{ "Micron_M500_*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | |
|
ATA_HORKAGE_ZERO_AFTER_TRIM, }, |
|
{ "Crucial_CT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | |
|
ATA_HORKAGE_ZERO_AFTER_TRIM, }, |
|
{ "Micron_M5[15]0_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM | |
|
ATA_HORKAGE_ZERO_AFTER_TRIM, }, |
|
{ "Crucial_CT*M550*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM | |
|
ATA_HORKAGE_ZERO_AFTER_TRIM, }, |
|
{ "Crucial_CT*MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM | |
|
ATA_HORKAGE_ZERO_AFTER_TRIM, }, |
|
{ "Samsung SSD 840*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | |
|
ATA_HORKAGE_ZERO_AFTER_TRIM, }, |
|
{ "Samsung SSD 850*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | |
|
ATA_HORKAGE_ZERO_AFTER_TRIM, }, |
|
{ "Samsung SSD 860*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | |
|
ATA_HORKAGE_ZERO_AFTER_TRIM | |
|
ATA_HORKAGE_NO_NCQ_ON_ATI, }, |
|
{ "Samsung SSD 870*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | |
|
ATA_HORKAGE_ZERO_AFTER_TRIM | |
|
ATA_HORKAGE_NO_NCQ_ON_ATI, }, |
|
{ "FCCT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | |
|
ATA_HORKAGE_ZERO_AFTER_TRIM, }, |
|
|
|
/* devices that don't properly handle TRIM commands */ |
|
{ "SuperSSpeed S238*", NULL, ATA_HORKAGE_NOTRIM, }, |
|
|
|
/* |
|
* As defined, the DRAT (Deterministic Read After Trim) and RZAT |
|
* (Return Zero After Trim) flags in the ATA Command Set are |
|
* unreliable in the sense that they only define what happens if |
|
* the device successfully executed the DSM TRIM command. TRIM |
|
* is only advisory, however, and the device is free to silently |
|
* ignore all or parts of the request. |
|
* |
|
* Whitelist drives that are known to reliably return zeroes |
|
* after TRIM. |
|
*/ |
|
|
|
/* |
|
* The intel 510 drive has buggy DRAT/RZAT. Explicitly exclude |
|
* that model before whitelisting all other intel SSDs. |
|
*/ |
|
{ "INTEL*SSDSC2MH*", NULL, 0, }, |
|
|
|
{ "Micron*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, }, |
|
{ "Crucial*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, }, |
|
{ "INTEL*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, }, |
|
{ "SSD*INTEL*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, }, |
|
{ "Samsung*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, }, |
|
{ "SAMSUNG*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, }, |
|
{ "SAMSUNG*MZ7KM*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, }, |
|
{ "ST[1248][0248]0[FH]*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, }, |
|
|
|
/* |
|
* Some WD SATA-I drives spin up and down erratically when the link |
|
* is put into the slumber mode. We don't have full list of the |
|
* affected devices. Disable LPM if the device matches one of the |
|
* known prefixes and is SATA-1. As a side effect LPM partial is |
|
* lost too. |
|
* |
|
* https://bugzilla.kernel.org/show_bug.cgi?id=57211 |
|
*/ |
|
{ "WDC WD800JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, |
|
{ "WDC WD1200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, |
|
{ "WDC WD1600JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, |
|
{ "WDC WD2000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, |
|
{ "WDC WD2500JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, |
|
{ "WDC WD3000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, |
|
{ "WDC WD3200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, |
|
|
|
/* End Marker */ |
|
{ } |
|
}; |
|
|
|
static unsigned long ata_dev_blacklisted(const struct ata_device *dev) |
|
{ |
|
unsigned char model_num[ATA_ID_PROD_LEN + 1]; |
|
unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; |
|
const struct ata_blacklist_entry *ad = ata_device_blacklist; |
|
|
|
ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); |
|
ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); |
|
|
|
while (ad->model_num) { |
|
if (glob_match(ad->model_num, model_num)) { |
|
if (ad->model_rev == NULL) |
|
return ad->horkage; |
|
if (glob_match(ad->model_rev, model_rev)) |
|
return ad->horkage; |
|
} |
|
ad++; |
|
} |
|
return 0; |
|
} |
|
|
|
static int ata_dma_blacklisted(const struct ata_device *dev) |
|
{ |
|
/* We don't support polling DMA. |
|
* DMA blacklist those ATAPI devices with CDB-intr (and use PIO) |
|
* if the LLDD handles only interrupts in the HSM_ST_LAST state. |
|
*/ |
|
if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && |
|
(dev->flags & ATA_DFLAG_CDB_INTR)) |
|
return 1; |
|
return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; |
|
} |
|
|
|
/** |
|
* ata_is_40wire - check drive side detection |
|
* @dev: device |
|
* |
|
* Perform drive side detection decoding, allowing for device vendors |
|
* who can't follow the documentation. |
|
*/ |
|
|
|
static int ata_is_40wire(struct ata_device *dev) |
|
{ |
|
if (dev->horkage & ATA_HORKAGE_IVB) |
|
return ata_drive_40wire_relaxed(dev->id); |
|
return ata_drive_40wire(dev->id); |
|
} |
|
|
|
/** |
|
* cable_is_40wire - 40/80/SATA decider |
|
* @ap: port to consider |
|
* |
|
* This function encapsulates the policy for speed management |
|
* in one place. At the moment we don't cache the result but |
|
* there is a good case for setting ap->cbl to the result when |
|
* we are called with unknown cables (and figuring out if it |
|
* impacts hotplug at all). |
|
* |
|
* Return 1 if the cable appears to be 40 wire. |
|
*/ |
|
|
|
static int cable_is_40wire(struct ata_port *ap) |
|
{ |
|
struct ata_link *link; |
|
struct ata_device *dev; |
|
|
|
/* If the controller thinks we are 40 wire, we are. */ |
|
if (ap->cbl == ATA_CBL_PATA40) |
|
return 1; |
|
|
|
/* If the controller thinks we are 80 wire, we are. */ |
|
if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA) |
|
return 0; |
|
|
|
/* If the system is known to be 40 wire short cable (eg |
|
* laptop), then we allow 80 wire modes even if the drive |
|
* isn't sure. |
|
*/ |
|
if (ap->cbl == ATA_CBL_PATA40_SHORT) |
|
return 0; |
|
|
|
/* If the controller doesn't know, we scan. |
|
* |
|
* Note: We look for all 40 wire detects at this point. Any |
|
* 80 wire detect is taken to be 80 wire cable because |
|
* - in many setups only the one drive (slave if present) will |
|
* give a valid detect |
|
* - if you have a non detect capable drive you don't want it |
|
* to colour the choice |
|
*/ |
|
ata_for_each_link(link, ap, EDGE) { |
|
ata_for_each_dev(dev, link, ENABLED) { |
|
if (!ata_is_40wire(dev)) |
|
return 0; |
|
} |
|
} |
|
return 1; |
|
} |
|
|
|
/** |
|
* ata_dev_xfermask - Compute supported xfermask of the given device |
|
* @dev: Device to compute xfermask for |
|
* |
|
* Compute supported xfermask of @dev and store it in |
|
* dev->*_mask. This function is responsible for applying all |
|
* known limits including host controller limits, device |
|
* blacklist, etc... |
|
* |
|
* LOCKING: |
|
* None. |
|
*/ |
|
static void ata_dev_xfermask(struct ata_device *dev) |
|
{ |
|
struct ata_link *link = dev->link; |
|
struct ata_port *ap = link->ap; |
|
struct ata_host *host = ap->host; |
|
unsigned long xfer_mask; |
|
|
|
/* controller modes available */ |
|
xfer_mask = ata_pack_xfermask(ap->pio_mask, |
|
ap->mwdma_mask, ap->udma_mask); |
|
|
|
/* drive modes available */ |
|
xfer_mask &= ata_pack_xfermask(dev->pio_mask, |
|
dev->mwdma_mask, dev->udma_mask); |
|
xfer_mask &= ata_id_xfermask(dev->id); |
|
|
|
/* |
|
* CFA Advanced TrueIDE timings are not allowed on a shared |
|
* cable |
|
*/ |
|
if (ata_dev_pair(dev)) { |
|
/* No PIO5 or PIO6 */ |
|
xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); |
|
/* No MWDMA3 or MWDMA 4 */ |
|
xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); |
|
} |
|
|
|
if (ata_dma_blacklisted(dev)) { |
|
xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); |
|
ata_dev_warn(dev, |
|
"device is on DMA blacklist, disabling DMA\n"); |
|
} |
|
|
|
if ((host->flags & ATA_HOST_SIMPLEX) && |
|
host->simplex_claimed && host->simplex_claimed != ap) { |
|
xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); |
|
ata_dev_warn(dev, |
|
"simplex DMA is claimed by other device, disabling DMA\n"); |
|
} |
|
|
|
if (ap->flags & ATA_FLAG_NO_IORDY) |
|
xfer_mask &= ata_pio_mask_no_iordy(dev); |
|
|
|
if (ap->ops->mode_filter) |
|
xfer_mask = ap->ops->mode_filter(dev, xfer_mask); |
|
|
|
/* Apply cable rule here. Don't apply it early because when |
|
* we handle hot plug the cable type can itself change. |
|
* Check this last so that we know if the transfer rate was |
|
* solely limited by the cable. |
|
* Unknown or 80 wire cables reported host side are checked |
|
* drive side as well. Cases where we know a 40wire cable |
|
* is used safely for 80 are not checked here. |
|
*/ |
|
if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) |
|
/* UDMA/44 or higher would be available */ |
|
if (cable_is_40wire(ap)) { |
|
ata_dev_warn(dev, |
|
"limited to UDMA/33 due to 40-wire cable\n"); |
|
xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); |
|
} |
|
|
|
ata_unpack_xfermask(xfer_mask, &dev->pio_mask, |
|
&dev->mwdma_mask, &dev->udma_mask); |
|
} |
|
|
|
/** |
|
* ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command |
|
* @dev: Device to which command will be sent |
|
* |
|
* Issue SET FEATURES - XFER MODE command to device @dev |
|
* on port @ap. |
|
* |
|
* LOCKING: |
|
* PCI/etc. bus probe sem. |
|
* |
|
* RETURNS: |
|
* 0 on success, AC_ERR_* mask otherwise. |
|
*/ |
|
|
|
static unsigned int ata_dev_set_xfermode(struct ata_device *dev) |
|
{ |
|
struct ata_taskfile tf; |
|
unsigned int err_mask; |
|
|
|
/* set up set-features taskfile */ |
|
DPRINTK("set features - xfer mode\n"); |
|
|
|
/* Some controllers and ATAPI devices show flaky interrupt |
|
* behavior after setting xfer mode. Use polling instead. |
|
*/ |
|
ata_tf_init(dev, &tf); |
|
tf.command = ATA_CMD_SET_FEATURES; |
|
tf.feature = SETFEATURES_XFER; |
|
tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; |
|
tf.protocol = ATA_PROT_NODATA; |
|
/* If we are using IORDY we must send the mode setting command */ |
|
if (ata_pio_need_iordy(dev)) |
|
tf.nsect = dev->xfer_mode; |
|
/* If the device has IORDY and the controller does not - turn it off */ |
|
else if (ata_id_has_iordy(dev->id)) |
|
tf.nsect = 0x01; |
|
else /* In the ancient relic department - skip all of this */ |
|
return 0; |
|
|
|
/* On some disks, this command causes spin-up, so we need longer timeout */ |
|
err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 15000); |
|
|
|
DPRINTK("EXIT, err_mask=%x\n", err_mask); |
|
return err_mask; |
|
} |
|
|
|
/** |
|
* ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES |
|
* @dev: Device to which command will be sent |
|
* @enable: Whether to enable or disable the feature |
|
* @feature: The sector count represents the feature to set |
|
* |
|
* Issue SET FEATURES - SATA FEATURES command to device @dev |
|
* on port @ap with sector count |
|
* |
|
* LOCKING: |
|
* PCI/etc. bus probe sem. |
|
* |
|
* RETURNS: |
|
* 0 on success, AC_ERR_* mask otherwise. |
|
*/ |
|
unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, u8 feature) |
|
{ |
|
struct ata_taskfile tf; |
|
unsigned int err_mask; |
|
unsigned long timeout = 0; |
|
|
|
/* set up set-features taskfile */ |
|
DPRINTK("set features - SATA features\n"); |
|
|
|
ata_tf_init(dev, &tf); |
|
tf.command = ATA_CMD_SET_FEATURES; |
|
tf.feature = enable; |
|
tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
|
tf.protocol = ATA_PROT_NODATA; |
|
tf.nsect = feature; |
|
|
|
if (enable == SETFEATURES_SPINUP) |
|
timeout = ata_probe_timeout ? |
|
ata_probe_timeout * 1000 : SETFEATURES_SPINUP_TIMEOUT; |
|
err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, timeout); |
|
|
|
DPRINTK("EXIT, err_mask=%x\n", err_mask); |
|
return err_mask; |
|
} |
|
EXPORT_SYMBOL_GPL(ata_dev_set_feature); |
|
|
|
/** |
|
* ata_dev_init_params - Issue INIT DEV PARAMS command |
|
* @dev: Device to which command will be sent |
|
* @heads: Number of heads (taskfile parameter) |
|
* @sectors: Number of sectors (taskfile parameter) |
|
* |
|
* LOCKING: |
|
* Kernel thread context (may sleep) |
|
* |
|
* RETURNS: |
|
* 0 on success, AC_ERR_* mask otherwise. |
|
*/ |
|
static unsigned int ata_dev_init_params(struct ata_device *dev, |
|
u16 heads, u16 sectors) |
|
{ |
|
struct ata_taskfile tf; |
|
unsigned int err_mask; |
|
|
|
/* Number of sectors per track 1-255. Number of heads 1-16 */ |
|
if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) |
|
return AC_ERR_INVALID; |
|
|
|
/* set up init dev params taskfile */ |
|
DPRINTK("init dev params \n"); |
|
|
|
ata_tf_init(dev, &tf); |
|
tf.command = ATA_CMD_INIT_DEV_PARAMS; |
|
tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
|
tf.protocol = ATA_PROT_NODATA; |
|
tf.nsect = sectors; |
|
tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ |
|
|
|
err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
|
/* A clean abort indicates an original or just out of spec drive |
|
and we should continue as we issue the setup based on the |
|
drive reported working geometry */ |
|
if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) |
|
err_mask = 0; |
|
|
|
DPRINTK("EXIT, err_mask=%x\n", err_mask); |
|
return err_mask; |
|
} |
|
|
|
/** |
|
* atapi_check_dma - Check whether ATAPI DMA can be supported |
|
* @qc: Metadata associated with taskfile to check |
|
* |
|
* Allow low-level driver to filter ATA PACKET commands, returning |
|
* a status indicating whether or not it is OK to use DMA for the |
|
* supplied PACKET command. |
|
* |
|
* LOCKING: |
|
* spin_lock_irqsave(host lock) |
|
* |
|
* RETURNS: 0 when ATAPI DMA can be used |
|
* nonzero otherwise |
|
*/ |
|
int atapi_check_dma(struct ata_queued_cmd *qc) |
|
{ |
|
struct ata_port *ap = qc->ap; |
|
|
|
/* Don't allow DMA if it isn't multiple of 16 bytes. Quite a |
|
* few ATAPI devices choke on such DMA requests. |
|
*/ |
|
if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) && |
|
unlikely(qc->nbytes & 15)) |
|
return 1; |
|
|
|
if (ap->ops->check_atapi_dma) |
|
return ap->ops->check_atapi_dma(qc); |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* ata_std_qc_defer - Check whether a qc needs to be deferred |
|
* @qc: ATA command in question |
|
* |
|
* Non-NCQ commands cannot run with any other command, NCQ or |
|
* not. As upper layer only knows the queue depth, we are |
|
* responsible for maintaining exclusion. This function checks |
|
* whether a new command @qc can be issued. |
|
* |
|
* LOCKING: |
|
* spin_lock_irqsave(host lock) |
|
* |
|
* RETURNS: |
|
* ATA_DEFER_* if deferring is needed, 0 otherwise. |
|
*/ |
|
int ata_std_qc_defer(struct ata_queued_cmd *qc) |
|
{ |
|
struct ata_link *link = qc->dev->link; |
|
|
|
if (ata_is_ncq(qc->tf.protocol)) { |
|
if (!ata_tag_valid(link->active_tag)) |
|
return 0; |
|
} else { |
|
if (!ata_tag_valid(link->active_tag) && !link->sactive) |
|
return 0; |
|
} |
|
|
|
return ATA_DEFER_LINK; |
|
} |
|
EXPORT_SYMBOL_GPL(ata_std_qc_defer); |
|
|
|
enum ata_completion_errors ata_noop_qc_prep(struct ata_queued_cmd *qc) |
|
{ |
|
return AC_ERR_OK; |
|
} |
|
EXPORT_SYMBOL_GPL(ata_noop_qc_prep); |
|
|
|
/** |
|
* ata_sg_init - Associate command with scatter-gather table. |
|
* @qc: Command to be associated |
|
* @sg: Scatter-gather table. |
|
* @n_elem: Number of elements in s/g table. |
|
* |
|
* Initialize the data-related elements of queued_cmd @qc |
|
* to point to a scatter-gather table @sg, containing @n_elem |
|
* elements. |
|
* |
|
* LOCKING: |
|
* spin_lock_irqsave(host lock) |
|
*/ |
|
void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
|
unsigned int n_elem) |
|
{ |
|
qc->sg = sg; |
|
qc->n_elem = n_elem; |
|
qc->cursg = qc->sg; |
|
} |
|
|
|
#ifdef CONFIG_HAS_DMA |
|
|
|
/** |
|
* ata_sg_clean - Unmap DMA memory associated with command |
|
* @qc: Command containing DMA memory to be released |
|
* |
|
* Unmap all mapped DMA memory associated with this command. |
|
* |
|
* LOCKING: |
|
* spin_lock_irqsave(host lock) |
|
*/ |
|
static void ata_sg_clean(struct ata_queued_cmd *qc) |
|
{ |
|
struct ata_port *ap = qc->ap; |
|
struct scatterlist *sg = qc->sg; |
|
int dir = qc->dma_dir; |
|
|
|
WARN_ON_ONCE(sg == NULL); |
|
|
|
VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
|
|
|
if (qc->n_elem) |
|
dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir); |
|
|
|
qc->flags &= ~ATA_QCFLAG_DMAMAP; |
|
qc->sg = NULL; |
|
} |
|
|
|
/** |
|
* ata_sg_setup - DMA-map the scatter-gather table associated with a command. |
|
* @qc: Command with scatter-gather table to be mapped. |
|
* |
|
* DMA-map the scatter-gather table associated with queued_cmd @qc. |
|
* |
|
* LOCKING: |
|
* spin_lock_irqsave(host lock) |
|
* |
|
* RETURNS: |
|
* Zero on success, negative on error. |
|
* |
|
*/ |
|
static int ata_sg_setup(struct ata_queued_cmd *qc) |
|
{ |
|
struct ata_port *ap = qc->ap; |
|
unsigned int n_elem; |
|
|
|
VPRINTK("ENTER, ata%u\n", ap->print_id); |
|
|
|
n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir); |
|
if (n_elem < 1) |
|
return -1; |
|
|
|
VPRINTK("%d sg elements mapped\n", n_elem); |
|
qc->orig_n_elem = qc->n_elem; |
|
qc->n_elem = n_elem; |
|
qc->flags |= ATA_QCFLAG_DMAMAP; |
|
|
|
return 0; |
|
} |
|
|
|
#else /* !CONFIG_HAS_DMA */ |
|
|
|
static inline void ata_sg_clean(struct ata_queued_cmd *qc) {} |
|
static inline int ata_sg_setup(struct ata_queued_cmd *qc) { return -1; } |
|
|
|
#endif /* !CONFIG_HAS_DMA */ |
|
|
|
/** |
|
* swap_buf_le16 - swap halves of 16-bit words in place |
|
* @buf: Buffer to swap |
|
* @buf_words: Number of 16-bit words in buffer. |
|
* |
|
* Swap halves of 16-bit words if needed to convert from |
|
* little-endian byte order to native cpu byte order, or |
|
* vice-versa. |
|
* |
|
* LOCKING: |
|
* Inherited from caller. |
|
*/ |
|
void swap_buf_le16(u16 *buf, unsigned int buf_words) |
|
{ |
|
#ifdef __BIG_ENDIAN |
|
unsigned int i; |
|
|
|
for (i = 0; i < buf_words; i++) |
|
buf[i] = le16_to_cpu(buf[i]); |
|
#endif /* __BIG_ENDIAN */ |
|
} |
|
|
|
/** |
|
* ata_qc_new_init - Request an available ATA command, and initialize it |
|
* @dev: Device from whom we request an available command structure |
|
* @tag: tag |
|
* |
|
* LOCKING: |
|
* None. |
|
*/ |
|
|
|
struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev, int tag) |
|
{ |
|
struct ata_port *ap = dev->link->ap; |
|
struct ata_queued_cmd *qc; |
|
|
|
/* no command while frozen */ |
|
if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) |
|
return NULL; |
|
|
|
/* libsas case */ |
|
if (ap->flags & ATA_FLAG_SAS_HOST) { |
|
tag = ata_sas_allocate_tag(ap); |
|
if (tag < 0) |
|
return NULL; |
|
} |
|
|
|
qc = __ata_qc_from_tag(ap, tag); |
|
qc->tag = qc->hw_tag = tag; |
|
qc->scsicmd = NULL; |
|
qc->ap = ap; |
|
qc->dev = dev; |
|
|
|
ata_qc_reinit(qc); |
|
|
|
return qc; |
|
} |
|
|
|
/** |
|
* ata_qc_free - free unused ata_queued_cmd |
|
* @qc: Command to complete |
|
* |
|
* Designed to free unused ata_queued_cmd object |
|
* in case something prevents using it. |
|
* |
|
* LOCKING: |
|
* spin_lock_irqsave(host lock) |
|
*/ |
|
void ata_qc_free(struct ata_queued_cmd *qc) |
|
{ |
|
struct ata_port *ap; |
|
unsigned int tag; |
|
|
|
WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
|
ap = qc->ap; |
|
|
|
qc->flags = 0; |
|
tag = qc->tag; |
|
if (ata_tag_valid(tag)) { |
|
qc->tag = ATA_TAG_POISON; |
|
if (ap->flags & ATA_FLAG_SAS_HOST) |
|
ata_sas_free_tag(tag, ap); |
|
} |
|
} |
|
|
|
void __ata_qc_complete(struct ata_queued_cmd *qc) |
|
{ |
|
struct ata_port *ap; |
|
struct ata_link *link; |
|
|
|
WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
|
WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE)); |
|
ap = qc->ap; |
|
link = qc->dev->link; |
|
|
|
if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) |
|
ata_sg_clean(qc); |
|
|
|
/* command should be marked inactive atomically with qc completion */ |
|
if (ata_is_ncq(qc->tf.protocol)) { |
|
link->sactive &= ~(1 << qc->hw_tag); |
|
if (!link->sactive) |
|
ap->nr_active_links--; |
|
} else { |
|
link->active_tag = ATA_TAG_POISON; |
|
ap->nr_active_links--; |
|
} |
|
|
|
/* clear exclusive status */ |
|
if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && |
|
ap->excl_link == link)) |
|
ap->excl_link = NULL; |
|
|
|
/* atapi: mark qc as inactive to prevent the interrupt handler |
|
* from completing the command twice later, before the error handler |
|
* is called. (when rc != 0 and atapi request sense is needed) |
|
*/ |
|
qc->flags &= ~ATA_QCFLAG_ACTIVE; |
|
ap->qc_active &= ~(1ULL << qc->tag); |
|
|
|
/* call completion callback */ |
|
qc->complete_fn(qc); |
|
} |
|
|
|
static void fill_result_tf(struct ata_queued_cmd *qc) |
|
{ |
|
struct ata_port *ap = qc->ap; |
|
|
|
qc->result_tf.flags = qc->tf.flags; |
|
ap->ops->qc_fill_rtf(qc); |
|
} |
|
|
|
static void ata_verify_xfer(struct ata_queued_cmd *qc) |
|
{ |
|
struct ata_device *dev = qc->dev; |
|
|
|
if (!ata_is_data(qc->tf.protocol)) |
|
return; |
|
|
|
if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol)) |
|
return; |
|
|
|
dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER; |
|
} |
|
|
|
/** |
|
* ata_qc_complete - Complete an active ATA command |
|
* @qc: Command to complete |
|
* |
|
* Indicate to the mid and upper layers that an ATA command has |
|
* completed, with either an ok or not-ok status. |
|
* |
|
* Refrain from calling this function multiple times when |
|
* successfully completing multiple NCQ commands. |
|
* ata_qc_complete_multiple() should be used instead, which will |
|
* properly update IRQ expect state. |
|
* |
|
* LOCKING: |
|
* spin_lock_irqsave(host lock) |
|
*/ |
|
void ata_qc_complete(struct ata_queued_cmd *qc) |
|
{ |
|
struct ata_port *ap = qc->ap; |
|
|
|
/* Trigger the LED (if available) */ |
|
ledtrig_disk_activity(!!(qc->tf.flags & ATA_TFLAG_WRITE)); |
|
|
|
/* XXX: New EH and old EH use different mechanisms to |
|
* synchronize EH with regular execution path. |
|
* |
|
* In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. |
|
* Normal execution path is responsible for not accessing a |
|
* failed qc. libata core enforces the rule by returning NULL |
|
* from ata_qc_from_tag() for failed qcs. |
|
* |
|
* Old EH depends on ata_qc_complete() nullifying completion |
|
* requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does |
|
* not synchronize with interrupt handler. Only PIO task is |
|
* taken care of. |
|
*/ |
|
if (ap->ops->error_handler) { |
|
struct ata_device *dev = qc->dev; |
|
struct ata_eh_info *ehi = &dev->link->eh_info; |
|
|
|
if (unlikely(qc->err_mask)) |
|
qc->flags |= ATA_QCFLAG_FAILED; |
|
|
|
/* |
|
* Finish internal commands without any further processing |
|
* and always with the result TF filled. |
|
*/ |
|
if (unlikely(ata_tag_internal(qc->tag))) { |
|
fill_result_tf(qc); |
|
trace_ata_qc_complete_internal(qc); |
|
__ata_qc_complete(qc); |
|
return; |
|
} |
|
|
|
/* |
|
* Non-internal qc has failed. Fill the result TF and |
|
* summon EH. |
|
*/ |
|
if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { |
|
fill_result_tf(qc); |
|
trace_ata_qc_complete_failed(qc); |
|
ata_qc_schedule_eh(qc); |
|
return; |
|
} |
|
|
|
WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN); |
|
|
|
/* read result TF if requested */ |
|
if (qc->flags & ATA_QCFLAG_RESULT_TF) |
|
fill_result_tf(qc); |
|
|
|
trace_ata_qc_complete_done(qc); |
|
/* Some commands need post-processing after successful |
|
* completion. |
|
*/ |
|
switch (qc->tf.command) { |
|
case ATA_CMD_SET_FEATURES: |
|
if (qc->tf.feature != SETFEATURES_WC_ON && |
|
qc->tf.feature != SETFEATURES_WC_OFF && |
|
qc->tf.feature != SETFEATURES_RA_ON && |
|
qc->tf.feature != SETFEATURES_RA_OFF) |
|
break; |
|
fallthrough; |
|
case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */ |
|
case ATA_CMD_SET_MULTI: /* multi_count changed */ |
|
/* revalidate device */ |
|
ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE; |
|
ata_port_schedule_eh(ap); |
|
break; |
|
|
|
case ATA_CMD_SLEEP: |
|
dev->flags |= ATA_DFLAG_SLEEPING; |
|
break; |
|
} |
|
|
|
if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) |
|
ata_verify_xfer(qc); |
|
|
|
__ata_qc_complete(qc); |
|
} else { |
|
if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) |
|
return; |
|
|
|
/* read result TF if failed or requested */ |
|
if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) |
|
fill_result_tf(qc); |
|
|
|
__ata_qc_complete(qc); |
|
} |
|
} |
|
EXPORT_SYMBOL_GPL(ata_qc_complete); |
|
|
|
/** |
|
* ata_qc_get_active - get bitmask of active qcs |
|
* @ap: port in question |
|
* |
|
* LOCKING: |
|
* spin_lock_irqsave(host lock) |
|
* |
|
* RETURNS: |
|
* Bitmask of active qcs |
|
*/ |
|
u64 ata_qc_get_active(struct ata_port *ap) |
|
{ |
|
u64 qc_active = ap->qc_active; |
|
|
|
/* ATA_TAG_INTERNAL is sent to hw as tag 0 */ |
|
if (qc_active & (1ULL << ATA_TAG_INTERNAL)) { |
|
qc_active |= (1 << 0); |
|
qc_active &= ~(1ULL << ATA_TAG_INTERNAL); |
|
} |
|
|
|
return qc_active; |
|
} |
|
EXPORT_SYMBOL_GPL(ata_qc_get_active); |
|
|
|
/** |
|
* ata_qc_issue - issue taskfile to device |
|
* @qc: command to issue to device |
|
* |
|
* Prepare an ATA command to submission to device. |
|
* This includes mapping the data into a DMA-able |
|
* area, filling in the S/G table, and finally |
|
* writing the taskfile to hardware, starting the command. |
|
* |
|
* LOCKING: |
|
* spin_lock_irqsave(host lock) |
|
*/ |
|
void ata_qc_issue(struct ata_queued_cmd *qc) |
|
{ |
|
struct ata_port *ap = qc->ap; |
|
struct ata_link *link = qc->dev->link; |
|
u8 prot = qc->tf.protocol; |
|
|
|
/* Make sure only one non-NCQ command is outstanding. The |
|
* check is skipped for old EH because it reuses active qc to |
|
* request ATAPI sense. |
|
*/ |
|
WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag)); |
|
|
|
if (ata_is_ncq(prot)) { |
|
WARN_ON_ONCE(link->sactive & (1 << qc->hw_tag)); |
|
|
|
if (!link->sactive) |
|
ap->nr_active_links++; |
|
link->sactive |= 1 << qc->hw_tag; |
|
} else { |
|
WARN_ON_ONCE(link->sactive); |
|
|
|
ap->nr_active_links++; |
|
link->active_tag = qc->tag; |
|
} |
|
|
|
qc->flags |= ATA_QCFLAG_ACTIVE; |
|
ap->qc_active |= 1ULL << qc->tag; |
|
|
|
/* |
|
* We guarantee to LLDs that they will have at least one |
|
* non-zero sg if the command is a data command. |
|
*/ |
|
if (ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes)) |
|
goto sys_err; |
|
|
|
if (ata_is_dma(prot) || (ata_is_pio(prot) && |
|
(ap->flags & ATA_FLAG_PIO_DMA))) |
|
if (ata_sg_setup(qc)) |
|
goto sys_err; |
|
|
|
/* if device is sleeping, schedule reset and abort the link */ |
|
if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) { |
|
link->eh_info.action |= ATA_EH_RESET; |
|
ata_ehi_push_desc(&link->eh_info, "waking up from sleep"); |
|
ata_link_abort(link); |
|
return; |
|
} |
|
|
|
qc->err_mask |= ap->ops->qc_prep(qc); |
|
if (unlikely(qc->err_mask)) |
|
goto err; |
|
trace_ata_qc_issue(qc); |
|
qc->err_mask |= ap->ops->qc_issue(qc); |
|
if (unlikely(qc->err_mask)) |
|
goto err; |
|
return; |
|
|
|
sys_err: |
|
qc->err_mask |= AC_ERR_SYSTEM; |
|
err: |
|
ata_qc_complete(qc); |
|
} |
|
|
|
/** |
|
* ata_phys_link_online - test whether the given link is online |
|
* @link: ATA link to test |
|
* |
|
* Test whether @link is online. Note that this function returns |
|
* 0 if online status of @link cannot be obtained, so |
|
* ata_link_online(link) != !ata_link_offline(link). |
|
* |
|
* LOCKING: |
|
* None. |
|
* |
|
* RETURNS: |
|
* True if the port online status is available and online. |
|
*/ |
|
bool ata_phys_link_online(struct ata_link *link) |
|
{ |
|
u32 sstatus; |
|
|
|
if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
|
ata_sstatus_online(sstatus)) |
|
return true; |
|
return false; |
|
} |
|
|
|
/** |
|
* ata_phys_link_offline - test whether the given link is offline |
|
* @link: ATA link to test |
|
* |
|
* Test whether @link is offline. Note that this function |
|
* returns 0 if offline status of @link cannot be obtained, so |
|
* ata_link_online(link) != !ata_link_offline(link). |
|
* |
|
* LOCKING: |
|
* None. |
|
* |
|
* RETURNS: |
|
* True if the port offline status is available and offline. |
|
*/ |
|
bool ata_phys_link_offline(struct ata_link *link) |
|
{ |
|
u32 sstatus; |
|
|
|
if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
|
!ata_sstatus_online(sstatus)) |
|
return true; |
|
return false; |
|
} |
|
|
|
/** |
|
* ata_link_online - test whether the given link is online |
|
* @link: ATA link to test |
|
* |
|
* Test whether @link is online. This is identical to |
|
* ata_phys_link_online() when there's no slave link. When |
|
* there's a slave link, this function should only be called on |
|
* the master link and will return true if any of M/S links is |
|
* online. |
|
* |
|
* LOCKING: |
|
* None. |
|
* |
|
* RETURNS: |
|
* True if the port online status is available and online. |
|
*/ |
|
bool ata_link_online(struct ata_link *link) |
|
{ |
|
struct ata_link *slave = link->ap->slave_link; |
|
|
|
WARN_ON(link == slave); /* shouldn't be called on slave link */ |
|
|
|
return ata_phys_link_online(link) || |
|
(slave && ata_phys_link_online(slave)); |
|
} |
|
EXPORT_SYMBOL_GPL(ata_link_online); |
|
|
|
/** |
|
* ata_link_offline - test whether the given link is offline |
|
* @link: ATA link to test |
|
* |
|
* Test whether @link is offline. This is identical to |
|
* ata_phys_link_offline() when there's no slave link. When |
|
* there's a slave link, this function should only be called on |
|
* the master link and will return true if both M/S links are |
|
* offline. |
|
* |
|
* LOCKING: |
|
* None. |
|
* |
|
* RETURNS: |
|
* True if the port offline status is available and offline. |
|
*/ |
|
bool ata_link_offline(struct ata_link *link) |
|
{ |
|
struct ata_link *slave = link->ap->slave_link; |
|
|
|
WARN_ON(link == slave); /* shouldn't be called on slave link */ |
|
|
|
return ata_phys_link_offline(link) && |
|
(!slave || ata_phys_link_offline(slave)); |
|
} |
|
EXPORT_SYMBOL_GPL(ata_link_offline); |
|
|
|
#ifdef CONFIG_PM |
|
static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg, |
|
unsigned int action, unsigned int ehi_flags, |
|
bool async) |
|
{ |
|
struct ata_link *link; |
|
unsigned long flags; |
|
|
|
/* Previous resume operation might still be in |
|
* progress. Wait for PM_PENDING to clear. |
|
*/ |
|
if (ap->pflags & ATA_PFLAG_PM_PENDING) { |
|
ata_port_wait_eh(ap); |
|
WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); |
|
} |
|
|
|
/* request PM ops to EH */ |
|
spin_lock_irqsave(ap->lock, flags); |
|
|
|
ap->pm_mesg = mesg; |
|
ap->pflags |= ATA_PFLAG_PM_PENDING; |
|
ata_for_each_link(link, ap, HOST_FIRST) { |
|
link->eh_info.action |= action; |
|
link->eh_info.flags |= ehi_flags; |
|
} |
|
|
|
ata_port_schedule_eh(ap); |
|
|
|
spin_unlock_irqrestore(ap->lock, flags); |
|
|
|
if (!async) { |
|
ata_port_wait_eh(ap); |
|
WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); |
|
} |
|
} |
|
|
|
/* |
|
* On some hardware, device fails to respond after spun down for suspend. As |
|
* the device won't be used before being resumed, we don't need to touch the |
|
* device. Ask EH to skip the usual stuff and proceed directly to suspend. |
|
* |
|
* http://thread.gmane.org/gmane.linux.ide/46764 |
|
*/ |
|
static const unsigned int ata_port_suspend_ehi = ATA_EHI_QUIET |
|
| ATA_EHI_NO_AUTOPSY |
|
| ATA_EHI_NO_RECOVERY; |
|
|
|
static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg) |
|
{ |
|
ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, false); |
|
} |
|
|
|
static void ata_port_suspend_async(struct ata_port *ap, pm_message_t mesg) |
|
{ |
|
ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, true); |
|
} |
|
|
|
static int ata_port_pm_suspend(struct device *dev) |
|
{ |
|
struct ata_port *ap = to_ata_port(dev); |
|
|
|
if (pm_runtime_suspended(dev)) |
|
return 0; |
|
|
|
ata_port_suspend(ap, PMSG_SUSPEND); |
|
return 0; |
|
} |
|
|
|
static int ata_port_pm_freeze(struct device *dev) |
|
{ |
|
struct ata_port *ap = to_ata_port(dev); |
|
|
|
if (pm_runtime_suspended(dev)) |
|
return 0; |
|
|
|
ata_port_suspend(ap, PMSG_FREEZE); |
|
return 0; |
|
} |
|
|
|
static int ata_port_pm_poweroff(struct device *dev) |
|
{ |
|
ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE); |
|
return 0; |
|
} |
|
|
|
static const unsigned int ata_port_resume_ehi = ATA_EHI_NO_AUTOPSY |
|
| ATA_EHI_QUIET; |
|
|
|
static void ata_port_resume(struct ata_port *ap, pm_message_t mesg) |
|
{ |
|
ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, false); |
|
} |
|
|
|
static void ata_port_resume_async(struct ata_port *ap, pm_message_t mesg) |
|
{ |
|
ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, true); |
|
} |
|
|
|
static int ata_port_pm_resume(struct device *dev) |
|
{ |
|
ata_port_resume_async(to_ata_port(dev), PMSG_RESUME); |
|
pm_runtime_disable(dev); |
|
pm_runtime_set_active(dev); |
|
pm_runtime_enable(dev); |
|
return 0; |
|
} |
|
|
|
/* |
|
* For ODDs, the upper layer will poll for media change every few seconds, |
|
* which will make it enter and leave suspend state every few seconds. And |
|
* as each suspend will cause a hard/soft reset, the gain of runtime suspend |
|
* is very little and the ODD may malfunction after constantly being reset. |
|
* So the idle callback here will not proceed to suspend if a non-ZPODD capable |
|
* ODD is attached to the port. |
|
*/ |
|
static int ata_port_runtime_idle(struct device *dev) |
|
{ |
|
struct ata_port *ap = to_ata_port(dev); |
|
struct ata_link *link; |
|
struct ata_device *adev; |
|
|
|
ata_for_each_link(link, ap, HOST_FIRST) { |
|
ata_for_each_dev(adev, link, ENABLED) |
|
if (adev->class == ATA_DEV_ATAPI && |
|
!zpodd_dev_enabled(adev)) |
|
return -EBUSY; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int ata_port_runtime_suspend(struct device *dev) |
|
{ |
|
ata_port_suspend(to_ata_port(dev), PMSG_AUTO_SUSPEND); |
|
return 0; |
|
} |
|
|
|
static int ata_port_runtime_resume(struct device *dev) |
|
{ |
|
ata_port_resume(to_ata_port(dev), PMSG_AUTO_RESUME); |
|
return 0; |
|
} |
|
|
|
static const struct dev_pm_ops ata_port_pm_ops = { |
|
.suspend = ata_port_pm_suspend, |
|
.resume = ata_port_pm_resume, |
|
.freeze = ata_port_pm_freeze, |
|
.thaw = ata_port_pm_resume, |
|
.poweroff = ata_port_pm_poweroff, |
|
.restore = ata_port_pm_resume, |
|
|
|
.runtime_suspend = ata_port_runtime_suspend, |
|
.runtime_resume = ata_port_runtime_resume, |
|
.runtime_idle = ata_port_runtime_idle, |
|
}; |
|
|
|
/* sas ports don't participate in pm runtime management of ata_ports, |
|
* and need to resume ata devices at the domain level, not the per-port |
|
* level. sas suspend/resume is async to allow parallel port recovery |
|
* since sas has multiple ata_port instances per Scsi_Host. |
|
*/ |
|
void ata_sas_port_suspend(struct ata_port *ap) |
|
{ |
|
ata_port_suspend_async(ap, PMSG_SUSPEND); |
|
} |
|
EXPORT_SYMBOL_GPL(ata_sas_port_suspend); |
|
|
|
void ata_sas_port_resume(struct ata_port *ap) |
|
{ |
|
ata_port_resume_async(ap, PMSG_RESUME); |
|
} |
|
EXPORT_SYMBOL_GPL(ata_sas_port_resume); |
|
|
|
/** |
|
* ata_host_suspend - suspend host |
|
* @host: host to suspend |
|
* @mesg: PM message |
|
* |
|
* Suspend @host. Actual operation is performed by port suspend. |
|
*/ |
|
int ata_host_suspend(struct ata_host *host, pm_message_t mesg) |
|
{ |
|
host->dev->power.power_state = mesg; |
|
return 0; |
|
} |
|
EXPORT_SYMBOL_GPL(ata_host_suspend); |
|
|
|
/** |
|
* ata_host_resume - resume host |
|
* @host: host to resume |
|
* |
|
* Resume @host. Actual operation is performed by port resume. |
|
*/ |
|
void ata_host_resume(struct ata_host *host) |
|
{ |
|
host->dev->power.power_state = PMSG_ON; |
|
} |
|
EXPORT_SYMBOL_GPL(ata_host_resume); |
|
#endif |
|
|
|
const struct device_type ata_port_type = { |
|
.name = "ata_port", |
|
#ifdef CONFIG_PM |
|
.pm = &ata_port_pm_ops, |
|
#endif |
|
}; |
|
|
|
/** |
|
* ata_dev_init - Initialize an ata_device structure |
|
* @dev: Device structure to initialize |
|
* |
|
* Initialize @dev in preparation for probing. |
|
* |
|
* LOCKING: |
|
* Inherited from caller. |
|
*/ |
|
void ata_dev_init(struct ata_device *dev) |
|
{ |
|
struct ata_link *link = ata_dev_phys_link(dev); |
|
struct ata_port *ap = link->ap; |
|
unsigned long flags; |
|
|
|
/* SATA spd limit is bound to the attached device, reset together */ |
|
link->sata_spd_limit = link->hw_sata_spd_limit; |
|
link->sata_spd = 0; |
|
|
|
/* High bits of dev->flags are used to record warm plug |
|
* requests which occur asynchronously. Synchronize using |
|
* host lock. |
|
*/ |
|
spin_lock_irqsave(ap->lock, flags); |
|
dev->flags &= ~ATA_DFLAG_INIT_MASK; |
|
dev->horkage = 0; |
|
spin_unlock_irqrestore(ap->lock, flags); |
|
|
|
memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0, |
|
ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN); |
|
dev->pio_mask = UINT_MAX; |
|
dev->mwdma_mask = UINT_MAX; |
|
dev->udma_mask = UINT_MAX; |
|
} |
|
|
|
/** |
|
* ata_link_init - Initialize an ata_link structure |
|
* @ap: ATA port link is attached to |
|
* @link: Link structure to initialize |
|
* @pmp: Port multiplier port number |
|
* |
|
* Initialize @link. |
|
* |
|
* LOCKING: |
|
* Kernel thread context (may sleep) |
|
*/ |
|
void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) |
|
{ |
|
int i; |
|
|
|
/* clear everything except for devices */ |
|
memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0, |
|
ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN); |
|
|
|
link->ap = ap; |
|
link->pmp = pmp; |
|
link->active_tag = ATA_TAG_POISON; |
|
link->hw_sata_spd_limit = UINT_MAX; |
|
|
|
/* can't use iterator, ap isn't initialized yet */ |
|
for (i = 0; i < ATA_MAX_DEVICES; i++) { |
|
struct ata_device *dev = &link->device[i]; |
|
|
|
dev->link = link; |
|
dev->devno = dev - link->device; |
|
#ifdef CONFIG_ATA_ACPI |
|
dev->gtf_filter = ata_acpi_gtf_filter; |
|
#endif |
|
ata_dev_init(dev); |
|
} |
|
} |
|
|
|
/** |
|
* sata_link_init_spd - Initialize link->sata_spd_limit |
|
* @link: Link to configure sata_spd_limit for |
|
* |
|
* Initialize ``link->[hw_]sata_spd_limit`` to the currently |
|
* configured value. |
|
* |
|
* LOCKING: |
|
* Kernel thread context (may sleep). |
|
* |
|
* RETURNS: |
|
* 0 on success, -errno on failure. |
|
*/ |
|
int sata_link_init_spd(struct ata_link *link) |
|
{ |
|
u8 spd; |
|
int rc; |
|
|
|
rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol); |
|
if (rc) |
|
return rc; |
|
|
|
spd = (link->saved_scontrol >> 4) & 0xf; |
|
if (spd) |
|
link->hw_sata_spd_limit &= (1 << spd) - 1; |
|
|
|
ata_force_link_limits(link); |
|
|
|
link->sata_spd_limit = link->hw_sata_spd_limit; |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* ata_port_alloc - allocate and initialize basic ATA port resources |
|
* @host: ATA host this allocated port belongs to |
|
* |
|
* Allocate and initialize basic ATA port resources. |
|
* |
|
* RETURNS: |
|
* Allocate ATA port on success, NULL on failure. |
|
* |
|
* LOCKING: |
|
* Inherited from calling layer (may sleep). |
|
*/ |
|
struct ata_port *ata_port_alloc(struct ata_host *host) |
|
{ |
|
struct ata_port *ap; |
|
|
|
DPRINTK("ENTER\n"); |
|
|
|
ap = kzalloc(sizeof(*ap), GFP_KERNEL); |
|
if (!ap) |
|
return NULL; |
|
|
|
ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN; |
|
ap->lock = &host->lock; |
|
ap->print_id = -1; |
|
ap->local_port_no = -1; |
|
ap->host = host; |
|
ap->dev = host->dev; |
|
|
|
#if defined(ATA_VERBOSE_DEBUG) |
|
/* turn on all debugging levels */ |
|
ap->msg_enable = 0x00FF; |
|
#elif defined(ATA_DEBUG) |
|
ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; |
|
#else |
|
ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; |
|
#endif |
|
|
|
mutex_init(&ap->scsi_scan_mutex); |
|
INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); |
|
INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); |
|
INIT_LIST_HEAD(&ap->eh_done_q); |
|
init_waitqueue_head(&ap->eh_wait_q); |
|
init_completion(&ap->park_req_pending); |
|
timer_setup(&ap->fastdrain_timer, ata_eh_fastdrain_timerfn, |
|
TIMER_DEFERRABLE); |
|
|
|
ap->cbl = ATA_CBL_NONE; |
|
|
|
ata_link_init(ap, &ap->link, 0); |
|
|
|
#ifdef ATA_IRQ_TRAP |
|
ap->stats.unhandled_irq = 1; |
|
ap->stats.idle_irq = 1; |
|
#endif |
|
ata_sff_port_init(ap); |
|
|
|
return ap; |
|
} |
|
|
|
static void ata_devres_release(struct device *gendev, void *res) |
|
{ |
|
struct ata_host *host = dev_get_drvdata(gendev); |
|
int i; |
|
|
|
for (i = 0; i < host->n_ports; i++) { |
|
struct ata_port *ap = host->ports[i]; |
|
|
|
if (!ap) |
|
continue; |
|
|
|
if (ap->scsi_host) |
|
scsi_host_put(ap->scsi_host); |
|
|
|
} |
|
|
|
dev_set_drvdata(gendev, NULL); |
|
ata_host_put(host); |
|
} |
|
|
|
static void ata_host_release(struct kref *kref) |
|
{ |
|
struct ata_host *host = container_of(kref, struct ata_host, kref); |
|
int i; |
|
|
|
for (i = 0; i < host->n_ports; i++) { |
|
struct ata_port *ap = host->ports[i]; |
|
|
|
kfree(ap->pmp_link); |
|
kfree(ap->slave_link); |
|
kfree(ap); |
|
host->ports[i] = NULL; |
|
} |
|
kfree(host); |
|
} |
|
|
|
void ata_host_get(struct ata_host *host) |
|
{ |
|
kref_get(&host->kref); |
|
} |
|
|
|
void ata_host_put(struct ata_host *host) |
|
{ |
|
kref_put(&host->kref, ata_host_release); |
|
} |
|
EXPORT_SYMBOL_GPL(ata_host_put); |
|
|
|
/** |
|
* ata_host_alloc - allocate and init basic ATA host resources |
|
* @dev: generic device this host is associated with |
|
* @max_ports: maximum number of ATA ports associated with this host |
|
* |
|
* Allocate and initialize basic ATA host resources. LLD calls |
|
* this function to allocate a host, initializes it fully and |
|
* attaches it using ata_host_register(). |
|
* |
|
* @max_ports ports are allocated and host->n_ports is |
|
* initialized to @max_ports. The caller is allowed to decrease |
|
* host->n_ports before calling ata_host_register(). The unused |
|
* ports will be automatically freed on registration. |
|
* |
|
* RETURNS: |
|
* Allocate ATA host on success, NULL on failure. |
|
* |
|
* LOCKING: |
|
* Inherited from calling layer (may sleep). |
|
*/ |
|
struct ata_host *ata_host_alloc(struct device *dev, int max_ports) |
|
{ |
|
struct ata_host *host; |
|
size_t sz; |
|
int i; |
|
void *dr; |
|
|
|
DPRINTK("ENTER\n"); |
|
|
|
/* alloc a container for our list of ATA ports (buses) */ |
|
sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); |
|
host = kzalloc(sz, GFP_KERNEL); |
|
if (!host) |
|
return NULL; |
|
|
|
if (!devres_open_group(dev, NULL, GFP_KERNEL)) |
|
goto err_free; |
|
|
|
dr = devres_alloc(ata_devres_release, 0, GFP_KERNEL); |
|
if (!dr) |
|
goto err_out; |
|
|
|
devres_add(dev, dr); |
|
dev_set_drvdata(dev, host); |
|
|
|
spin_lock_init(&host->lock); |
|
mutex_init(&host->eh_mutex); |
|
host->dev = dev; |
|
host->n_ports = max_ports; |
|
kref_init(&host->kref); |
|
|
|
/* allocate ports bound to this host */ |
|
for (i = 0; i < max_ports; i++) { |
|
struct ata_port *ap; |
|
|
|
ap = ata_port_alloc(host); |
|
if (!ap) |
|
goto err_out; |
|
|
|
ap->port_no = i; |
|
host->ports[i] = ap; |
|
} |
|
|
|
devres_remove_group(dev, NULL); |
|
return host; |
|
|
|
err_out: |
|
devres_release_group(dev, NULL); |
|
err_free: |
|
kfree(host); |
|
return NULL; |
|
} |
|
EXPORT_SYMBOL_GPL(ata_host_alloc); |
|
|
|
/** |
|
* ata_host_alloc_pinfo - alloc host and init with port_info array |
|
* @dev: generic device this host is associated with |
|
* @ppi: array of ATA port_info to initialize host with |
|
* @n_ports: number of ATA ports attached to this host |
|
* |
|
* Allocate ATA host and initialize with info from @ppi. If NULL |
|
* terminated, @ppi may contain fewer entries than @n_ports. The |
|
* last entry will be used for the remaining ports. |
|
* |
|
* RETURNS: |
|
* Allocate ATA host on success, NULL on failure. |
|
* |
|
* LOCKING: |
|
* Inherited from calling layer (may sleep). |
|
*/ |
|
struct ata_host *ata_host_alloc_pinfo(struct device *dev, |
|
const struct ata_port_info * const * ppi, |
|
int n_ports) |
|
{ |
|
const struct ata_port_info *pi; |
|
struct ata_host *host; |
|
int i, j; |
|
|
|
host = ata_host_alloc(dev, n_ports); |
|
if (!host) |
|
return NULL; |
|
|
|
for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { |
|
struct ata_port *ap = host->ports[i]; |
|
|
|
if (ppi[j]) |
|
pi = ppi[j++]; |
|
|
|
ap->pio_mask = pi->pio_mask; |
|
ap->mwdma_mask = pi->mwdma_mask; |
|
ap->udma_mask = pi->udma_mask; |
|
ap->flags |= pi->flags; |
|
ap->link.flags |= pi->link_flags; |
|
ap->ops = pi->port_ops; |
|
|
|
if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) |
|
host->ops = pi->port_ops; |
|
} |
|
|
|
return host; |
|
} |
|
EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); |
|
|
|
static void ata_host_stop(struct device *gendev, void *res) |
|
{ |
|
struct ata_host *host = dev_get_drvdata(gendev); |
|
int i; |
|
|
|
WARN_ON(!(host->flags & ATA_HOST_STARTED)); |
|
|
|
for (i = 0; i < host->n_ports; i++) { |
|
struct ata_port *ap = host->ports[i]; |
|
|
|
if (ap->ops->port_stop) |
|
ap->ops->port_stop(ap); |
|
} |
|
|
|
if (host->ops->host_stop) |
|
host->ops->host_stop(host); |
|
} |
|
|
|
/** |
|
* ata_finalize_port_ops - finalize ata_port_operations |
|
* @ops: ata_port_operations to finalize |
|
* |
|
* An ata_port_operations can inherit from another ops and that |
|
* ops can again inherit from another. This can go on as many |
|
* times as necessary as long as there is no loop in the |
|
* inheritance chain. |
|
* |
|
* Ops tables are finalized when the host is started. NULL or |
|
* unspecified entries are inherited from the closet ancestor |
|
* which has the method and the entry is populated with it. |
|
* After finalization, the ops table directly points to all the |
|
* methods and ->inherits is no longer necessary and cleared. |
|
* |
|
* Using ATA_OP_NULL, inheriting ops can force a method to NULL. |
|
* |
|
* LOCKING: |
|
* None. |
|
*/ |
|
static void ata_finalize_port_ops(struct ata_port_operations *ops) |
|
{ |
|
static DEFINE_SPINLOCK(lock); |
|
const struct ata_port_operations *cur; |
|
void **begin = (void **)ops; |
|
void **end = (void **)&ops->inherits; |
|
void **pp; |
|
|
|
if (!ops || !ops->inherits) |
|
return; |
|
|
|
spin_lock(&lock); |
|
|
|
for (cur = ops->inherits; cur; cur = cur->inherits) { |
|
void **inherit = (void **)cur; |
|
|
|
for (pp = begin; pp < end; pp++, inherit++) |
|
if (!*pp) |
|
*pp = *inherit; |
|
} |
|
|
|
for (pp = begin; pp < end; pp++) |
|
if (IS_ERR(*pp)) |
|
*pp = NULL; |
|
|
|
ops->inherits = NULL; |
|
|
|
spin_unlock(&lock); |
|
} |
|
|
|
/** |
|
* ata_host_start - start and freeze ports of an ATA host |
|
* @host: ATA host to start ports for |
|
* |
|
* Start and then freeze ports of @host. Started status is |
|
* recorded in host->flags, so this function can be called |
|
* multiple times. Ports are guaranteed to get started only |
|
* once. If host->ops isn't initialized yet, its set to the |
|
* first non-dummy port ops. |
|
* |
|
* LOCKING: |
|
* Inherited from calling layer (may sleep). |
|
* |
|
* RETURNS: |
|
* 0 if all ports are started successfully, -errno otherwise. |
|
*/ |
|
int ata_host_start(struct ata_host *host) |
|
{ |
|
int have_stop = 0; |
|
void *start_dr = NULL; |
|
int i, rc; |
|
|
|
if (host->flags & ATA_HOST_STARTED) |
|
return 0; |
|
|
|
ata_finalize_port_ops(host->ops); |
|
|
|
for (i = 0; i < host->n_ports; i++) { |
|
struct ata_port *ap = host->ports[i]; |
|
|
|
ata_finalize_port_ops(ap->ops); |
|
|
|
if (!host->ops && !ata_port_is_dummy(ap)) |
|
host->ops = ap->ops; |
|
|
|
if (ap->ops->port_stop) |
|
have_stop = 1; |
|
} |
|
|
|
if (host->ops && host->ops->host_stop) |
|
have_stop = 1; |
|
|
|
if (have_stop) { |
|
start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL); |
|
if (!start_dr) |
|
return -ENOMEM; |
|
} |
|
|
|
for (i = 0; i < host->n_ports; i++) { |
|
struct ata_port *ap = host->ports[i]; |
|
|
|
if (ap->ops->port_start) { |
|
rc = ap->ops->port_start(ap); |
|
if (rc) { |
|
if (rc != -ENODEV) |
|
dev_err(host->dev, |
|
"failed to start port %d (errno=%d)\n", |
|
i, rc); |
|
goto err_out; |
|
} |
|
} |
|
ata_eh_freeze_port(ap); |
|
} |
|
|
|
if (start_dr) |
|
devres_add(host->dev, start_dr); |
|
host->flags |= ATA_HOST_STARTED; |
|
return 0; |
|
|
|
err_out: |
|
while (--i >= 0) { |
|
struct ata_port *ap = host->ports[i]; |
|
|
|
if (ap->ops->port_stop) |
|
ap->ops->port_stop(ap); |
|
} |
|
devres_free(start_dr); |
|
return rc; |
|
} |
|
EXPORT_SYMBOL_GPL(ata_host_start); |
|
|
|
/** |
|
* ata_host_init - Initialize a host struct for sas (ipr, libsas) |
|
* @host: host to initialize |
|
* @dev: device host is attached to |
|
* @ops: port_ops |
|
* |
|
*/ |
|
void ata_host_init(struct ata_host *host, struct device *dev, |
|
struct ata_port_operations *ops) |
|
{ |
|
spin_lock_init(&host->lock); |
|
mutex_init(&host->eh_mutex); |
|
host->n_tags = ATA_MAX_QUEUE; |
|
host->dev = dev; |
|
host->ops = ops; |
|
kref_init(&host->kref); |
|
} |
|
EXPORT_SYMBOL_GPL(ata_host_init); |
|
|
|
void __ata_port_probe(struct ata_port *ap) |
|
{ |
|
struct ata_eh_info *ehi = &ap->link.eh_info; |
|
unsigned long flags; |
|
|
|
/* kick EH for boot probing */ |
|
spin_lock_irqsave(ap->lock, flags); |
|
|
|
ehi->probe_mask |= ATA_ALL_DEVICES; |
|
ehi->action |= ATA_EH_RESET; |
|
ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; |
|
|
|
ap->pflags &= ~ATA_PFLAG_INITIALIZING; |
|
ap->pflags |= ATA_PFLAG_LOADING; |
|
ata_port_schedule_eh(ap); |
|
|
|
spin_unlock_irqrestore(ap->lock, flags); |
|
} |
|
|
|
int ata_port_probe(struct ata_port *ap) |
|
{ |
|
int rc = 0; |
|
|
|
if (ap->ops->error_handler) { |
|
__ata_port_probe(ap); |
|
ata_port_wait_eh(ap); |
|
} else { |
|
DPRINTK("ata%u: bus probe begin\n", ap->print_id); |
|
rc = ata_bus_probe(ap); |
|
DPRINTK("ata%u: bus probe end\n", ap->print_id); |
|
} |
|
return rc; |
|
} |
|
|
|
|
|
static void async_port_probe(void *data, async_cookie_t cookie) |
|
{ |
|
struct ata_port *ap = data; |
|
|
|
/* |
|
* If we're not allowed to scan this host in parallel, |
|
* we need to wait until all previous scans have completed |
|
* before going further. |
|
* Jeff Garzik says this is only within a controller, so we |
|
* don't need to wait for port 0, only for later ports. |
|
*/ |
|
if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0) |
|
async_synchronize_cookie(cookie); |
|
|
|
(void)ata_port_probe(ap); |
|
|
|
/* in order to keep device order, we need to synchronize at this point */ |
|
async_synchronize_cookie(cookie); |
|
|
|
ata_scsi_scan_host(ap, 1); |
|
} |
|
|
|
/** |
|
* ata_host_register - register initialized ATA host |
|
* @host: ATA host to register |
|
* @sht: template for SCSI host |
|
* |
|
* Register initialized ATA host. @host is allocated using |
|
* ata_host_alloc() and fully initialized by LLD. This function |
|
* starts ports, registers @host with ATA and SCSI layers and |
|
* probe registered devices. |
|
* |
|
* LOCKING: |
|
* Inherited from calling layer (may sleep). |
|
* |
|
* RETURNS: |
|
* 0 on success, -errno otherwise. |
|
*/ |
|
int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) |
|
{ |
|
int i, rc; |
|
|
|
host->n_tags = clamp(sht->can_queue, 1, ATA_MAX_QUEUE); |
|
|
|
/* host must have been started */ |
|
if (!(host->flags & ATA_HOST_STARTED)) { |
|
dev_err(host->dev, "BUG: trying to register unstarted host\n"); |
|
WARN_ON(1); |
|
return -EINVAL; |
|
} |
|
|
|
/* Blow away unused ports. This happens when LLD can't |
|
* determine the exact number of ports to allocate at |
|
* allocation time. |
|
*/ |
|
for (i = host->n_ports; host->ports[i]; i++) |
|
kfree(host->ports[i]); |
|
|
|
/* give ports names and add SCSI hosts */ |
|
for (i = 0; i < host->n_ports; i++) { |
|
host->ports[i]->print_id = atomic_inc_return(&ata_print_id); |
|
host->ports[i]->local_port_no = i + 1; |
|
} |
|
|
|
/* Create associated sysfs transport objects */ |
|
for (i = 0; i < host->n_ports; i++) { |
|
rc = ata_tport_add(host->dev,host->ports[i]); |
|
if (rc) { |
|
goto err_tadd; |
|
} |
|
} |
|
|
|
rc = ata_scsi_add_hosts(host, sht); |
|
if (rc) |
|
goto err_tadd; |
|
|
|
/* set cable, sata_spd_limit and report */ |
|
for (i = 0; i < host->n_ports; i++) { |
|
struct ata_port *ap = host->ports[i]; |
|
unsigned long xfer_mask; |
|
|
|
/* set SATA cable type if still unset */ |
|
if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) |
|
ap->cbl = ATA_CBL_SATA; |
|
|
|
/* init sata_spd_limit to the current value */ |
|
sata_link_init_spd(&ap->link); |
|
if (ap->slave_link) |
|
sata_link_init_spd(ap->slave_link); |
|
|
|
/* print per-port info to dmesg */ |
|
xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, |
|
ap->udma_mask); |
|
|
|
if (!ata_port_is_dummy(ap)) { |
|
ata_port_info(ap, "%cATA max %s %s\n", |
|
(ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', |
|
ata_mode_string(xfer_mask), |
|
ap->link.eh_info.desc); |
|
ata_ehi_clear_desc(&ap->link.eh_info); |
|
} else |
|
ata_port_info(ap, "DUMMY\n"); |
|
} |
|
|
|
/* perform each probe asynchronously */ |
|
for (i = 0; i < host->n_ports; i++) { |
|
struct ata_port *ap = host->ports[i]; |
|
ap->cookie = async_schedule(async_port_probe, ap); |
|
} |
|
|
|
return 0; |
|
|
|
err_tadd: |
|
while (--i >= 0) { |
|
ata_tport_delete(host->ports[i]); |
|
} |
|
return rc; |
|
|
|
} |
|
EXPORT_SYMBOL_GPL(ata_host_register); |
|
|
|
/** |
|
* ata_host_activate - start host, request IRQ and register it |
|
* @host: target ATA host |
|
* @irq: IRQ to request |
|
* @irq_handler: irq_handler used when requesting IRQ |
|
* @irq_flags: irq_flags used when requesting IRQ |
|
* @sht: scsi_host_template to use when registering the host |
|
* |
|
* After allocating an ATA host and initializing it, most libata |
|
* LLDs perform three steps to activate the host - start host, |
|
* request IRQ and register it. This helper takes necessary |
|
* arguments and performs the three steps in one go. |
|
* |
|
* An invalid IRQ skips the IRQ registration and expects the host to |
|
* have set polling mode on the port. In this case, @irq_handler |
|
* should be NULL. |
|
* |
|
* LOCKING: |
|
* Inherited from calling layer (may sleep). |
|
* |
|
* RETURNS: |
|
* 0 on success, -errno otherwise. |
|
*/ |
|
int ata_host_activate(struct ata_host *host, int irq, |
|
irq_handler_t irq_handler, unsigned long irq_flags, |
|
struct scsi_host_template *sht) |
|
{ |
|
int i, rc; |
|
char *irq_desc; |
|
|
|
rc = ata_host_start(host); |
|
if (rc) |
|
return rc; |
|
|
|
/* Special case for polling mode */ |
|
if (!irq) { |
|
WARN_ON(irq_handler); |
|
return ata_host_register(host, sht); |
|
} |
|
|
|
irq_desc = devm_kasprintf(host->dev, GFP_KERNEL, "%s[%s]", |
|
dev_driver_string(host->dev), |
|
dev_name(host->dev)); |
|
if (!irq_desc) |
|
return -ENOMEM; |
|
|
|
rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, |
|
irq_desc, host); |
|
if (rc) |
|
return rc; |
|
|
|
for (i = 0; i < host->n_ports; i++) |
|
ata_port_desc(host->ports[i], "irq %d", irq); |
|
|
|
rc = ata_host_register(host, sht); |
|
/* if failed, just free the IRQ and leave ports alone */ |
|
if (rc) |
|
devm_free_irq(host->dev, irq, host); |
|
|
|
return rc; |
|
} |
|
EXPORT_SYMBOL_GPL(ata_host_activate); |
|
|
|
/** |
|
* ata_port_detach - Detach ATA port in preparation of device removal |
|
* @ap: ATA port to be detached |
|
* |
|
* Detach all ATA devices and the associated SCSI devices of @ap; |
|
* then, remove the associated SCSI host. @ap is guaranteed to |
|
* be quiescent on return from this function. |
|
* |
|
* LOCKING: |
|
* Kernel thread context (may sleep). |
|
*/ |
|
static void ata_port_detach(struct ata_port *ap) |
|
{ |
|
unsigned long flags; |
|
struct ata_link *link; |
|
struct ata_device *dev; |
|
|
|
if (!ap->ops->error_handler) |
|
goto skip_eh; |
|
|
|
/* tell EH we're leaving & flush EH */ |
|
spin_lock_irqsave(ap->lock, flags); |
|
ap->pflags |= ATA_PFLAG_UNLOADING; |
|
ata_port_schedule_eh(ap); |
|
spin_unlock_irqrestore(ap->lock, flags); |
|
|
|
/* wait till EH commits suicide */ |
|
ata_port_wait_eh(ap); |
|
|
|
/* it better be dead now */ |
|
WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED)); |
|
|
|
cancel_delayed_work_sync(&ap->hotplug_task); |
|
|
|
skip_eh: |
|
/* clean up zpodd on port removal */ |
|
ata_for_each_link(link, ap, HOST_FIRST) { |
|
ata_for_each_dev(dev, link, ALL) { |
|
if (zpodd_dev_enabled(dev)) |
|
zpodd_exit(dev); |
|
} |
|
} |
|
if (ap->pmp_link) { |
|
int i; |
|
for (i = 0; i < SATA_PMP_MAX_PORTS; i++) |
|
ata_tlink_delete(&ap->pmp_link[i]); |
|
} |
|
/* remove the associated SCSI host */ |
|
scsi_remove_host(ap->scsi_host); |
|
ata_tport_delete(ap); |
|
} |
|
|
|
/** |
|
* ata_host_detach - Detach all ports of an ATA host |
|
* @host: Host to detach |
|
* |
|
* Detach all ports of @host. |
|
* |
|
* LOCKING: |
|
* Kernel thread context (may sleep). |
|
*/ |
|
void ata_host_detach(struct ata_host *host) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < host->n_ports; i++) { |
|
/* Ensure ata_port probe has completed */ |
|
async_synchronize_cookie(host->ports[i]->cookie + 1); |
|
ata_port_detach(host->ports[i]); |
|
} |
|
|
|
/* the host is dead now, dissociate ACPI */ |
|
ata_acpi_dissociate(host); |
|
} |
|
EXPORT_SYMBOL_GPL(ata_host_detach); |
|
|
|
#ifdef CONFIG_PCI |
|
|
|
/** |
|
* ata_pci_remove_one - PCI layer callback for device removal |
|
* @pdev: PCI device that was removed |
|
* |
|
* PCI layer indicates to libata via this hook that hot-unplug or |
|
* module unload event has occurred. Detach all ports. Resource |
|
* release is handled via devres. |
|
* |
|
* LOCKING: |
|
* Inherited from PCI layer (may sleep). |
|
*/ |
|
void ata_pci_remove_one(struct pci_dev *pdev) |
|
{ |
|
struct ata_host *host = pci_get_drvdata(pdev); |
|
|
|
ata_host_detach(host); |
|
} |
|
EXPORT_SYMBOL_GPL(ata_pci_remove_one); |
|
|
|
void ata_pci_shutdown_one(struct pci_dev *pdev) |
|
{ |
|
struct ata_host *host = pci_get_drvdata(pdev); |
|
int i; |
|
|
|
for (i = 0; i < host->n_ports; i++) { |
|
struct ata_port *ap = host->ports[i]; |
|
|
|
ap->pflags |= ATA_PFLAG_FROZEN; |
|
|
|
/* Disable port interrupts */ |
|
if (ap->ops->freeze) |
|
ap->ops->freeze(ap); |
|
|
|
/* Stop the port DMA engines */ |
|
if (ap->ops->port_stop) |
|
ap->ops->port_stop(ap); |
|
} |
|
} |
|
EXPORT_SYMBOL_GPL(ata_pci_shutdown_one); |
|
|
|
/* move to PCI subsystem */ |
|
int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) |
|
{ |
|
unsigned long tmp = 0; |
|
|
|
switch (bits->width) { |
|
case 1: { |
|
u8 tmp8 = 0; |
|
pci_read_config_byte(pdev, bits->reg, &tmp8); |
|
tmp = tmp8; |
|
break; |
|
} |
|
case 2: { |
|
u16 tmp16 = 0; |
|
pci_read_config_word(pdev, bits->reg, &tmp16); |
|
tmp = tmp16; |
|
break; |
|
} |
|
case 4: { |
|
u32 tmp32 = 0; |
|
pci_read_config_dword(pdev, bits->reg, &tmp32); |
|
tmp = tmp32; |
|
break; |
|
} |
|
|
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
tmp &= bits->mask; |
|
|
|
return (tmp == bits->val) ? 1 : 0; |
|
} |
|
EXPORT_SYMBOL_GPL(pci_test_config_bits); |
|
|
|
#ifdef CONFIG_PM |
|
void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) |
|
{ |
|
pci_save_state(pdev); |
|
pci_disable_device(pdev); |
|
|
|
if (mesg.event & PM_EVENT_SLEEP) |
|
pci_set_power_state(pdev, PCI_D3hot); |
|
} |
|
EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); |
|
|
|
int ata_pci_device_do_resume(struct pci_dev *pdev) |
|
{ |
|
int rc; |
|
|
|
pci_set_power_state(pdev, PCI_D0); |
|
pci_restore_state(pdev); |
|
|
|
rc = pcim_enable_device(pdev); |
|
if (rc) { |
|
dev_err(&pdev->dev, |
|
"failed to enable device after resume (%d)\n", rc); |
|
return rc; |
|
} |
|
|
|
pci_set_master(pdev); |
|
return 0; |
|
} |
|
EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); |
|
|
|
int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) |
|
{ |
|
struct ata_host *host = pci_get_drvdata(pdev); |
|
int rc = 0; |
|
|
|
rc = ata_host_suspend(host, mesg); |
|
if (rc) |
|
return rc; |
|
|
|
ata_pci_device_do_suspend(pdev, mesg); |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
|
|
|
int ata_pci_device_resume(struct pci_dev *pdev) |
|
{ |
|
struct ata_host *host = pci_get_drvdata(pdev); |
|
int rc; |
|
|
|
rc = ata_pci_device_do_resume(pdev); |
|
if (rc == 0) |
|
ata_host_resume(host); |
|
return rc; |
|
} |
|
EXPORT_SYMBOL_GPL(ata_pci_device_resume); |
|
#endif /* CONFIG_PM */ |
|
#endif /* CONFIG_PCI */ |
|
|
|
/** |
|
* ata_platform_remove_one - Platform layer callback for device removal |
|
* @pdev: Platform device that was removed |
|
* |
|
* Platform layer indicates to libata via this hook that hot-unplug or |
|
* module unload event has occurred. Detach all ports. Resource |
|
* release is handled via devres. |
|
* |
|
* LOCKING: |
|
* Inherited from platform layer (may sleep). |
|
*/ |
|
int ata_platform_remove_one(struct platform_device *pdev) |
|
{ |
|
struct ata_host *host = platform_get_drvdata(pdev); |
|
|
|
ata_host_detach(host); |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL_GPL(ata_platform_remove_one); |
|
|
|
#ifdef CONFIG_ATA_FORCE |
|
static int __init ata_parse_force_one(char **cur, |
|
struct ata_force_ent *force_ent, |
|
const char **reason) |
|
{ |
|
static const struct ata_force_param force_tbl[] __initconst = { |
|
{ "40c", .cbl = ATA_CBL_PATA40 }, |
|
{ "80c", .cbl = ATA_CBL_PATA80 }, |
|
{ "short40c", .cbl = ATA_CBL_PATA40_SHORT }, |
|
{ "unk", .cbl = ATA_CBL_PATA_UNK }, |
|
{ "ign", .cbl = ATA_CBL_PATA_IGN }, |
|
{ "sata", .cbl = ATA_CBL_SATA }, |
|
{ "1.5Gbps", .spd_limit = 1 }, |
|
{ "3.0Gbps", .spd_limit = 2 }, |
|
{ "noncq", .horkage_on = ATA_HORKAGE_NONCQ }, |
|
{ "ncq", .horkage_off = ATA_HORKAGE_NONCQ }, |
|
{ "noncqtrim", .horkage_on = ATA_HORKAGE_NO_NCQ_TRIM }, |
|
{ "ncqtrim", .horkage_off = ATA_HORKAGE_NO_NCQ_TRIM }, |
|
{ "noncqati", .horkage_on = ATA_HORKAGE_NO_NCQ_ON_ATI }, |
|
{ "ncqati", .horkage_off = ATA_HORKAGE_NO_NCQ_ON_ATI }, |
|
{ "dump_id", .horkage_on = ATA_HORKAGE_DUMP_ID }, |
|
{ "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) }, |
|
{ "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) }, |
|
{ "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) }, |
|
{ "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) }, |
|
{ "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) }, |
|
{ "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) }, |
|
{ "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) }, |
|
{ "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) }, |
|
{ "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) }, |
|
{ "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) }, |
|
{ "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) }, |
|
{ "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) }, |
|
{ "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, |
|
{ "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, |
|
{ "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, |
|
{ "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, |
|
{ "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, |
|
{ "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, |
|
{ "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, |
|
{ "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, |
|
{ "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, |
|
{ "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, |
|
{ "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, |
|
{ "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, |
|
{ "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, |
|
{ "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, |
|
{ "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, |
|
{ "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, |
|
{ "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, |
|
{ "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, |
|
{ "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, |
|
{ "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, |
|
{ "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, |
|
{ "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) }, |
|
{ "nohrst", .lflags = ATA_LFLAG_NO_HRST }, |
|
{ "nosrst", .lflags = ATA_LFLAG_NO_SRST }, |
|
{ "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST }, |
|
{ "rstonce", .lflags = ATA_LFLAG_RST_ONCE }, |
|
{ "atapi_dmadir", .horkage_on = ATA_HORKAGE_ATAPI_DMADIR }, |
|
{ "disable", .horkage_on = ATA_HORKAGE_DISABLE }, |
|
}; |
|
char *start = *cur, *p = *cur; |
|
char *id, *val, *endp; |
|
const struct ata_force_param *match_fp = NULL; |
|
int nr_matches = 0, i; |
|
|
|
/* find where this param ends and update *cur */ |
|
while (*p != '\0' && *p != ',') |
|
p++; |
|
|
|
if (*p == '\0') |
|
*cur = p; |
|
else |
|
*cur = p + 1; |
|
|
|
*p = '\0'; |
|
|
|
/* parse */ |
|
p = strchr(start, ':'); |
|
if (!p) { |
|
val = strstrip(start); |
|
goto parse_val; |
|
} |
|
*p = '\0'; |
|
|
|
id = strstrip(start); |
|
val = strstrip(p + 1); |
|
|
|
/* parse id */ |
|
p = strchr(id, '.'); |
|
if (p) { |
|
*p++ = '\0'; |
|
force_ent->device = simple_strtoul(p, &endp, 10); |
|
if (p == endp || *endp != '\0') { |
|
*reason = "invalid device"; |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
force_ent->port = simple_strtoul(id, &endp, 10); |
|
if (id == endp || *endp != '\0') { |
|
*reason = "invalid port/link"; |
|
return -EINVAL; |
|
} |
|
|
|
parse_val: |
|
/* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */ |
|
for (i = 0; i < ARRAY_SIZE(force_tbl); i++) { |
|
const struct ata_force_param *fp = &force_tbl[i]; |
|
|
|
if (strncasecmp(val, fp->name, strlen(val))) |
|
continue; |
|
|
|
nr_matches++; |
|
match_fp = fp; |
|
|
|
if (strcasecmp(val, fp->name) == 0) { |
|
nr_matches = 1; |
|
break; |
|
} |
|
} |
|
|
|
if (!nr_matches) { |
|
*reason = "unknown value"; |
|
return -EINVAL; |
|
} |
|
if (nr_matches > 1) { |
|
*reason = "ambiguous value"; |
|
return -EINVAL; |
|
} |
|
|
|
force_ent->param = *match_fp; |
|
|
|
return 0; |
|
} |
|
|
|
static void __init ata_parse_force_param(void) |
|
{ |
|
int idx = 0, size = 1; |
|
int last_port = -1, last_device = -1; |
|
char *p, *cur, *next; |
|
|
|
/* calculate maximum number of params and allocate force_tbl */ |
|
for (p = ata_force_param_buf; *p; p++) |
|
if (*p == ',') |
|
size++; |
|
|
|
ata_force_tbl = kcalloc(size, sizeof(ata_force_tbl[0]), GFP_KERNEL); |
|
if (!ata_force_tbl) { |
|
printk(KERN_WARNING "ata: failed to extend force table, " |
|
"libata.force ignored\n"); |
|
return; |
|
} |
|
|
|
/* parse and populate the table */ |
|
for (cur = ata_force_param_buf; *cur != '\0'; cur = next) { |
|
const char *reason = ""; |
|
struct ata_force_ent te = { .port = -1, .device = -1 }; |
|
|
|
next = cur; |
|
if (ata_parse_force_one(&next, &te, &reason)) { |
|
printk(KERN_WARNING "ata: failed to parse force " |
|
"parameter \"%s\" (%s)\n", |
|
cur, reason); |
|
continue; |
|
} |
|
|
|
if (te.port == -1) { |
|
te.port = last_port; |
|
te.device = last_device; |
|
} |
|
|
|
ata_force_tbl[idx++] = te; |
|
|
|
last_port = te.port; |
|
last_device = te.device; |
|
} |
|
|
|
ata_force_tbl_size = idx; |
|
} |
|
|
|
static void ata_free_force_param(void) |
|
{ |
|
kfree(ata_force_tbl); |
|
} |
|
#else |
|
static inline void ata_parse_force_param(void) { } |
|
static inline void ata_free_force_param(void) { } |
|
#endif |
|
|
|
static int __init ata_init(void) |
|
{ |
|
int rc; |
|
|
|
ata_parse_force_param(); |
|
|
|
rc = ata_sff_init(); |
|
if (rc) { |
|
ata_free_force_param(); |
|
return rc; |
|
} |
|
|
|
libata_transport_init(); |
|
ata_scsi_transport_template = ata_attach_transport(); |
|
if (!ata_scsi_transport_template) { |
|
ata_sff_exit(); |
|
rc = -ENOMEM; |
|
goto err_out; |
|
} |
|
|
|
printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); |
|
return 0; |
|
|
|
err_out: |
|
return rc; |
|
} |
|
|
|
static void __exit ata_exit(void) |
|
{ |
|
ata_release_transport(ata_scsi_transport_template); |
|
libata_transport_exit(); |
|
ata_sff_exit(); |
|
ata_free_force_param(); |
|
} |
|
|
|
subsys_initcall(ata_init); |
|
module_exit(ata_exit); |
|
|
|
static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1); |
|
|
|
int ata_ratelimit(void) |
|
{ |
|
return __ratelimit(&ratelimit); |
|
} |
|
EXPORT_SYMBOL_GPL(ata_ratelimit); |
|
|
|
/** |
|
* ata_msleep - ATA EH owner aware msleep |
|
* @ap: ATA port to attribute the sleep to |
|
* @msecs: duration to sleep in milliseconds |
|
* |
|
* Sleeps @msecs. If the current task is owner of @ap's EH, the |
|
* ownership is released before going to sleep and reacquired |
|
* after the sleep is complete. IOW, other ports sharing the |
|
* @ap->host will be allowed to own the EH while this task is |
|
* sleeping. |
|
* |
|
* LOCKING: |
|
* Might sleep. |
|
*/ |
|
void ata_msleep(struct ata_port *ap, unsigned int msecs) |
|
{ |
|
bool owns_eh = ap && ap->host->eh_owner == current; |
|
|
|
if (owns_eh) |
|
ata_eh_release(ap); |
|
|
|
if (msecs < 20) { |
|
unsigned long usecs = msecs * USEC_PER_MSEC; |
|
usleep_range(usecs, usecs + 50); |
|
} else { |
|
msleep(msecs); |
|
} |
|
|
|
if (owns_eh) |
|
ata_eh_acquire(ap); |
|
} |
|
EXPORT_SYMBOL_GPL(ata_msleep); |
|
|
|
/** |
|
* ata_wait_register - wait until register value changes |
|
* @ap: ATA port to wait register for, can be NULL |
|
* @reg: IO-mapped register |
|
* @mask: Mask to apply to read register value |
|
* @val: Wait condition |
|
* @interval: polling interval in milliseconds |
|
* @timeout: timeout in milliseconds |
|
* |
|
* Waiting for some bits of register to change is a common |
|
* operation for ATA controllers. This function reads 32bit LE |
|
* IO-mapped register @reg and tests for the following condition. |
|
* |
|
* (*@reg & mask) != val |
|
* |
|
* If the condition is met, it returns; otherwise, the process is |
|
* repeated after @interval_msec until timeout. |
|
* |
|
* LOCKING: |
|
* Kernel thread context (may sleep) |
|
* |
|
* RETURNS: |
|
* The final register value. |
|
*/ |
|
u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val, |
|
unsigned long interval, unsigned long timeout) |
|
{ |
|
unsigned long deadline; |
|
u32 tmp; |
|
|
|
tmp = ioread32(reg); |
|
|
|
/* Calculate timeout _after_ the first read to make sure |
|
* preceding writes reach the controller before starting to |
|
* eat away the timeout. |
|
*/ |
|
deadline = ata_deadline(jiffies, timeout); |
|
|
|
while ((tmp & mask) == val && time_before(jiffies, deadline)) { |
|
ata_msleep(ap, interval); |
|
tmp = ioread32(reg); |
|
} |
|
|
|
return tmp; |
|
} |
|
EXPORT_SYMBOL_GPL(ata_wait_register); |
|
|
|
/* |
|
* Dummy port_ops |
|
*/ |
|
static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) |
|
{ |
|
return AC_ERR_SYSTEM; |
|
} |
|
|
|
static void ata_dummy_error_handler(struct ata_port *ap) |
|
{ |
|
/* truly dummy */ |
|
} |
|
|
|
struct ata_port_operations ata_dummy_port_ops = { |
|
.qc_prep = ata_noop_qc_prep, |
|
.qc_issue = ata_dummy_qc_issue, |
|
.error_handler = ata_dummy_error_handler, |
|
.sched_eh = ata_std_sched_eh, |
|
.end_eh = ata_std_end_eh, |
|
}; |
|
EXPORT_SYMBOL_GPL(ata_dummy_port_ops); |
|
|
|
const struct ata_port_info ata_dummy_port_info = { |
|
.port_ops = &ata_dummy_port_ops, |
|
}; |
|
EXPORT_SYMBOL_GPL(ata_dummy_port_info); |
|
|
|
/* |
|
* Utility print functions |
|
*/ |
|
void ata_port_printk(const struct ata_port *ap, const char *level, |
|
const char *fmt, ...) |
|
{ |
|
struct va_format vaf; |
|
va_list args; |
|
|
|
va_start(args, fmt); |
|
|
|
vaf.fmt = fmt; |
|
vaf.va = &args; |
|
|
|
printk("%sata%u: %pV", level, ap->print_id, &vaf); |
|
|
|
va_end(args); |
|
} |
|
EXPORT_SYMBOL(ata_port_printk); |
|
|
|
void ata_link_printk(const struct ata_link *link, const char *level, |
|
const char *fmt, ...) |
|
{ |
|
struct va_format vaf; |
|
va_list args; |
|
|
|
va_start(args, fmt); |
|
|
|
vaf.fmt = fmt; |
|
vaf.va = &args; |
|
|
|
if (sata_pmp_attached(link->ap) || link->ap->slave_link) |
|
printk("%sata%u.%02u: %pV", |
|
level, link->ap->print_id, link->pmp, &vaf); |
|
else |
|
printk("%sata%u: %pV", |
|
level, link->ap->print_id, &vaf); |
|
|
|
va_end(args); |
|
} |
|
EXPORT_SYMBOL(ata_link_printk); |
|
|
|
void ata_dev_printk(const struct ata_device *dev, const char *level, |
|
const char *fmt, ...) |
|
{ |
|
struct va_format vaf; |
|
va_list args; |
|
|
|
va_start(args, fmt); |
|
|
|
vaf.fmt = fmt; |
|
vaf.va = &args; |
|
|
|
printk("%sata%u.%02u: %pV", |
|
level, dev->link->ap->print_id, dev->link->pmp + dev->devno, |
|
&vaf); |
|
|
|
va_end(args); |
|
} |
|
EXPORT_SYMBOL(ata_dev_printk); |
|
|
|
void ata_print_version(const struct device *dev, const char *version) |
|
{ |
|
dev_printk(KERN_DEBUG, dev, "version %s\n", version); |
|
} |
|
EXPORT_SYMBOL(ata_print_version);
|
|
|