| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Tejun Heo | 16357 | 69.39% | 230 | 42.36% |
| Jeff Garzik | 984 | 4.17% | 39 | 7.18% |
| Alan Cox | 639 | 2.71% | 31 | 5.71% |
| Christoph Hellwig | 583 | 2.47% | 7 | 1.29% |
| Hannes Reinecke | 541 | 2.29% | 10 | 1.84% |
| Joe Perches | 401 | 1.70% | 5 | 0.92% |
| Bartlomiej Zolnierkiewicz | 397 | 1.68% | 9 | 1.66% |
| Dan J Williams | 278 | 1.18% | 9 | 1.66% |
| Lin Ming | 242 | 1.03% | 5 | 0.92% |
| Kristen Carlson Accardi | 168 | 0.71% | 4 | 0.74% |
| Adam Manzanares | 160 | 0.68% | 3 | 0.55% |
| Shaohua Li | 159 | 0.67% | 4 | 0.74% |
| Gwendal Grignou | 156 | 0.66% | 1 | 0.18% |
| Taras Kondratiuk | 155 | 0.66% | 1 | 0.18% |
| Martin K. Petersen | 131 | 0.56% | 8 | 1.47% |
| Arjan van de Ven | 129 | 0.55% | 2 | 0.37% |
| Albert Lee | 127 | 0.54% | 19 | 3.50% |
| Geert Uytterhoeven | 122 | 0.52% | 1 | 0.18% |
| Aaron Lu | 120 | 0.51% | 5 | 0.92% |
| Mark Lord | 118 | 0.50% | 7 | 1.29% |
| Marc Carino | 117 | 0.50% | 2 | 0.37% |
| Prabhakar Kushwaha | 94 | 0.40% | 1 | 0.18% |
| Shane Huang | 93 | 0.39% | 3 | 0.55% |
| Hans de Goede | 85 | 0.36% | 9 | 1.66% |
| Damien Le Moal | 68 | 0.29% | 4 | 0.74% |
| Jens Axboe | 60 | 0.25% | 9 | 1.66% |
| James Bottomley | 57 | 0.24% | 1 | 0.18% |
| David Milburn | 57 | 0.24% | 3 | 0.55% |
| Sascha Hauer | 56 | 0.24% | 1 | 0.18% |
| Borislav Petkov | 47 | 0.20% | 4 | 0.74% |
| Vincent Pelletier | 46 | 0.20% | 2 | 0.37% |
| Levente Kurusa | 43 | 0.18% | 1 | 0.18% |
| Heiner Kallweit | 40 | 0.17% | 1 | 0.18% |
| Brian Norris | 36 | 0.15% | 2 | 0.37% |
| Anil Veliyankara Madam | 31 | 0.13% | 1 | 0.18% |
| Shan Hai | 30 | 0.13% | 2 | 0.37% |
| Kai-Heng Feng | 29 | 0.12% | 2 | 0.37% |
| Andy Whitcroft | 28 | 0.12% | 1 | 0.18% |
| Eric D. Mudama | 28 | 0.12% | 1 | 0.18% |
| David Daney | 27 | 0.11% | 1 | 0.18% |
| Andrew Morton | 26 | 0.11% | 2 | 0.37% |
| Jiri Slaby | 23 | 0.10% | 1 | 0.18% |
| Brian King | 22 | 0.09% | 4 | 0.74% |
| Julia Lawall | 20 | 0.08% | 1 | 0.18% |
| Robert Hancock | 18 | 0.08% | 1 | 0.18% |
| Tom Yan | 16 | 0.07% | 1 | 0.18% |
| Vladimir LAVALLADE | 16 | 0.07% | 1 | 0.18% |
| Gustavo A. R. Silva | 16 | 0.07% | 1 | 0.18% |
| Akinobu Mita | 14 | 0.06% | 1 | 0.18% |
| Linus Walleij | 13 | 0.06% | 1 | 0.18% |
| Ju Hyung Park | 11 | 0.05% | 1 | 0.18% |
| Brad Campbell | 11 | 0.05% | 1 | 0.18% |
| Colin Ian King | 10 | 0.04% | 1 | 0.18% |
| Sudip Mukherjee | 10 | 0.04% | 1 | 0.18% |
| Tony Battersby | 10 | 0.04% | 1 | 0.18% |
| Guillermo A. Amaral | 10 | 0.04% | 1 | 0.18% |
| Sergei Shtylyov | 10 | 0.04% | 2 | 0.37% |
| François Cami | 9 | 0.04% | 1 | 0.18% |
| Robin H. Johnson | 9 | 0.04% | 1 | 0.18% |
| Jason Yan | 9 | 0.04% | 2 | 0.37% |
| Arne Fitzenreiter | 9 | 0.04% | 1 | 0.18% |
| Kevin Hao | 9 | 0.04% | 1 | 0.18% |
| Shikha Jain | 8 | 0.03% | 1 | 0.18% |
| Juha-Matti Tilli | 8 | 0.03% | 1 | 0.18% |
| Roland Dreier | 8 | 0.03% | 2 | 0.37% |
| FUJITA Tomonori | 8 | 0.03% | 1 | 0.18% |
| Rafael J. Wysocki | 8 | 0.03% | 3 | 0.55% |
| Daniel J Blueman | 8 | 0.03% | 1 | 0.18% |
| Lubomir Bulej | 8 | 0.03% | 1 | 0.18% |
| Prarit Bhargava | 8 | 0.03% | 2 | 0.37% |
| Aleksei Mamlin | 8 | 0.03% | 1 | 0.18% |
| Xinyu Lin | 8 | 0.03% | 1 | 0.18% |
| Diego Viola | 8 | 0.03% | 2 | 0.37% |
| Elias Oltmanns | 8 | 0.03% | 1 | 0.18% |
| George Spelvin | 7 | 0.03% | 2 | 0.37% |
| Jeff Mahoney | 7 | 0.03% | 1 | 0.18% |
| Francesco Antonacci | 7 | 0.03% | 1 | 0.18% |
| Masanari Iida | 7 | 0.03% | 2 | 0.37% |
| Benjamin Herrenschmidt | 6 | 0.03% | 1 | 0.18% |
| Stephan Linz | 6 | 0.03% | 1 | 0.18% |
| Evgeni Golov | 6 | 0.03% | 1 | 0.18% |
| mat.loikkanen@synopsys.com | 6 | 0.03% | 1 | 0.18% |
| Akira Iguchi | 6 | 0.03% | 1 | 0.18% |
| Michele Baldessari | 6 | 0.03% | 2 | 0.37% |
| zhao, forrest | 5 | 0.02% | 1 | 0.18% |
| David Woodhouse | 5 | 0.02% | 1 | 0.18% |
| Harvey Harrison | 5 | 0.02% | 1 | 0.18% |
| Kees Cook | 5 | 0.02% | 2 | 0.37% |
| Pete Zaitcev | 5 | 0.02% | 1 | 0.18% |
| Marios Andreopoulos | 5 | 0.02% | 1 | 0.18% |
| Pradeep Singh Rautela | 4 | 0.02% | 1 | 0.18% |
| Ingo Molnar | 3 | 0.01% | 1 | 0.18% |
| David Härdeman | 3 | 0.01% | 1 | 0.18% |
| Stefan Knoblich | 3 | 0.01% | 1 | 0.18% |
| Geliang Tang | 3 | 0.01% | 1 | 0.18% |
| David Howells | 3 | 0.01% | 1 | 0.18% |
| Mauro Carvalho Chehab | 2 | 0.01% | 2 | 0.37% |
| Maxime Bizon | 2 | 0.01% | 1 | 0.18% |
| Adrian Bunk | 2 | 0.01% | 2 | 0.37% |
| Rasmus Villemoes | 2 | 0.01% | 1 | 0.18% |
| Randy Dunlap | 2 | 0.01% | 2 | 0.37% |
| Paul Mundt | 2 | 0.01% | 1 | 0.18% |
| Mikulas Patocka | 2 | 0.01% | 1 | 0.18% |
| Bhumika Goyal | 1 | 0.00% | 1 | 0.18% |
| Thomas Gleixner | 1 | 0.00% | 1 | 0.18% |
| Adam Buchbinder | 1 | 0.00% | 1 | 0.18% |
| Alexander Shiyan | 1 | 0.00% | 1 | 0.18% |
| Dave Jones | 1 | 0.00% | 1 | 0.18% |
| Tero Roponen | 1 | 0.00% | 1 | 0.18% |
| Vegard Nossum | 1 | 0.00% | 1 | 0.18% |
| Arvind Yadav | 1 | 0.00% | 1 | 0.18% |
| Minwoo Im | 1 | 0.00% | 1 | 0.18% |
| Paul Menzel | 1 | 0.00% | 1 | 0.18% |
| Todd E Brandt | 1 | 0.00% | 1 | 0.18% |
| Total | 23574 | 543 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * libata-core.c - helper library for ATA * * Copyright 2003-2004 Red Hat, Inc. All rights reserved. * Copyright 2003-2004 Jeff Garzik * * libata documentation is available via 'make {ps|pdf}docs', * as Documentation/driver-api/libata.rst * * Hardware documentation available from http://www.t13.org/ and * http://www.sata-io.org/ * * Standards documents from: * http://www.t13.org (ATA standards, PCI DMA IDE spec) * http://www.t10.org (SCSI MMC - for ATAPI MMC) * http://www.sata-io.org (SATA) * http://www.compactflash.org (CF) * http://www.qic.org (QIC157 - Tape and DSC) * http://www.ce-ata.org (CE-ATA: not supported) * * libata is essentially a library of internal helper functions for * low-level ATA host controller drivers. As such, the API/ABI is * likely to change as new drivers are added and updated. * Do not depend on ABI/API stability. */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/init.h> #include <linux/list.h> #include <linux/mm.h> #include <linux/spinlock.h> #include <linux/blkdev.h> #include <linux/delay.h> #include <linux/timer.h> #include <linux/time.h> #include <linux/interrupt.h> #include <linux/completion.h> #include <linux/suspend.h> #include <linux/workqueue.h> #include <linux/scatterlist.h> #include <linux/io.h> #include <linux/log2.h> #include <linux/slab.h> #include <linux/glob.h> #include <scsi/scsi.h> #include <scsi/scsi_cmnd.h> #include <scsi/scsi_host.h> #include <linux/libata.h> #include <asm/byteorder.h> #include <asm/unaligned.h> #include <linux/cdrom.h> #include <linux/ratelimit.h> #include <linux/leds.h> #include <linux/pm_runtime.h> #include <linux/platform_device.h> #include <asm/setup.h> #define CREATE_TRACE_POINTS #include <trace/events/libata.h> #include "libata.h" #include "libata-transport.h" const struct ata_port_operations ata_base_port_ops = { .prereset = ata_std_prereset, .postreset = ata_std_postreset, .error_handler = ata_std_error_handler, .sched_eh = ata_std_sched_eh, .end_eh = ata_std_end_eh, }; const struct ata_port_operations sata_port_ops = { .inherits = &ata_base_port_ops, .qc_defer = ata_std_qc_defer, .hardreset = sata_std_hardreset, }; EXPORT_SYMBOL_GPL(sata_port_ops); static unsigned int ata_dev_init_params(struct ata_device *dev, u16 heads, u16 sectors); static unsigned int ata_dev_set_xfermode(struct ata_device *dev); static void ata_dev_xfermask(struct ata_device *dev); static unsigned long ata_dev_blacklisted(const struct ata_device *dev); atomic_t ata_print_id = ATOMIC_INIT(0); #ifdef CONFIG_ATA_FORCE struct ata_force_param { const char *name; u8 cbl; u8 spd_limit; unsigned long xfer_mask; unsigned int horkage_on; unsigned int horkage_off; u16 lflags; }; struct ata_force_ent { int port; int device; struct ata_force_param param; }; static struct ata_force_ent *ata_force_tbl; static int ata_force_tbl_size; static char ata_force_param_buf[COMMAND_LINE_SIZE] __initdata; /* param_buf is thrown away after initialization, disallow read */ module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0); MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/admin-guide/kernel-parameters.rst for details)"); #endif static int atapi_enabled = 1; module_param(atapi_enabled, int, 0444); MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])"); static int atapi_dmadir = 0; module_param(atapi_dmadir, int, 0444); MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)"); int atapi_passthru16 = 1; module_param(atapi_passthru16, int, 0444); MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])"); int libata_fua = 0; module_param_named(fua, libata_fua, int, 0444); MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)"); static int ata_ignore_hpa; module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA; module_param_named(dma, libata_dma_mask, int, 0444); MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)"); static int ata_probe_timeout; module_param(ata_probe_timeout, int, 0444); MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); int libata_noacpi = 0; module_param_named(noacpi, libata_noacpi, int, 0444); MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)"); int libata_allow_tpm = 0; module_param_named(allow_tpm, libata_allow_tpm, int, 0444); MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)"); static int atapi_an; module_param(atapi_an, int, 0444); MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)"); MODULE_AUTHOR("Jeff Garzik"); MODULE_DESCRIPTION("Library module for ATA devices"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); static bool ata_sstatus_online(u32 sstatus) { return (sstatus & 0xf) == 0x3; } /** * ata_link_next - link iteration helper * @link: the previous link, NULL to start * @ap: ATA port containing links to iterate * @mode: iteration mode, one of ATA_LITER_* * * LOCKING: * Host lock or EH context. * * RETURNS: * Pointer to the next link. */ struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap, enum ata_link_iter_mode mode) { BUG_ON(mode != ATA_LITER_EDGE && mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST); /* NULL link indicates start of iteration */ if (!link) switch (mode) { case ATA_LITER_EDGE: case ATA_LITER_PMP_FIRST: if (sata_pmp_attached(ap)) return ap->pmp_link; fallthrough; case ATA_LITER_HOST_FIRST: return &ap->link; } /* we just iterated over the host link, what's next? */ if (link == &ap->link) switch (mode) { case ATA_LITER_HOST_FIRST: if (sata_pmp_attached(ap)) return ap->pmp_link; fallthrough; case ATA_LITER_PMP_FIRST: if (unlikely(ap->slave_link)) return ap->slave_link; fallthrough; case ATA_LITER_EDGE: return NULL; } /* slave_link excludes PMP */ if (unlikely(link == ap->slave_link)) return NULL; /* we were over a PMP link */ if (++link < ap->pmp_link + ap->nr_pmp_links) return link; if (mode == ATA_LITER_PMP_FIRST) return &ap->link; return NULL; } EXPORT_SYMBOL_GPL(ata_link_next); /** * ata_dev_next - device iteration helper * @dev: the previous device, NULL to start * @link: ATA link containing devices to iterate * @mode: iteration mode, one of ATA_DITER_* * * LOCKING: * Host lock or EH context. * * RETURNS: * Pointer to the next device. */ struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link, enum ata_dev_iter_mode mode) { BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE && mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE); /* NULL dev indicates start of iteration */ if (!dev) switch (mode) { case ATA_DITER_ENABLED: case ATA_DITER_ALL: dev = link->device; goto check; case ATA_DITER_ENABLED_REVERSE: case ATA_DITER_ALL_REVERSE: dev = link->device + ata_link_max_devices(link) - 1; goto check; } next: /* move to the next one */ switch (mode) { case ATA_DITER_ENABLED: case ATA_DITER_ALL: if (++dev < link->device + ata_link_max_devices(link)) goto check; return NULL; case ATA_DITER_ENABLED_REVERSE: case ATA_DITER_ALL_REVERSE: if (--dev >= link->device) goto check; return NULL; } check: if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) && !ata_dev_enabled(dev)) goto next; return dev; } EXPORT_SYMBOL_GPL(ata_dev_next); /** * ata_dev_phys_link - find physical link for a device * @dev: ATA device to look up physical link for * * Look up physical link which @dev is attached to. Note that * this is different from @dev->link only when @dev is on slave * link. For all other cases, it's the same as @dev->link. * * LOCKING: * Don't care. * * RETURNS: * Pointer to the found physical link. */ struct ata_link *ata_dev_phys_link(struct ata_device *dev) { struct ata_port *ap = dev->link->ap; if (!ap->slave_link) return dev->link; if (!dev->devno) return &ap->link; return ap->slave_link; } #ifdef CONFIG_ATA_FORCE /** * ata_force_cbl - force cable type according to libata.force * @ap: ATA port of interest * * Force cable type according to libata.force and whine about it. * The last entry which has matching port number is used, so it * can be specified as part of device force parameters. For * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the * same effect. * * LOCKING: * EH context. */ void ata_force_cbl(struct ata_port *ap) { int i; for (i = ata_force_tbl_size - 1; i >= 0; i--) { const struct ata_force_ent *fe = &ata_force_tbl[i]; if (fe->port != -1 && fe->port != ap->print_id) continue; if (fe->param.cbl == ATA_CBL_NONE) continue; ap->cbl = fe->param.cbl; ata_port_notice(ap, "FORCE: cable set to %s\n", fe->param.name); return; } } /** * ata_force_link_limits - force link limits according to libata.force * @link: ATA link of interest * * Force link flags and SATA spd limit according to libata.force * and whine about it. When only the port part is specified * (e.g. 1:), the limit applies to all links connected to both * the host link and all fan-out ports connected via PMP. If the * device part is specified as 0 (e.g. 1.00:), it specifies the * first fan-out link not the host link. Device number 15 always * points to the host link whether PMP is attached or not. If the * controller has slave link, device number 16 points to it. * * LOCKING: * EH context. */ static void ata_force_link_limits(struct ata_link *link) { bool did_spd = false; int linkno = link->pmp; int i; if (ata_is_host_link(link)) linkno += 15; for (i = ata_force_tbl_size - 1; i >= 0; i--) { const struct ata_force_ent *fe = &ata_force_tbl[i]; if (fe->port != -1 && fe->port != link->ap->print_id) continue; if (fe->device != -1 && fe->device != linkno) continue; /* only honor the first spd limit */ if (!did_spd && fe->param.spd_limit) { link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1; ata_link_notice(link, "FORCE: PHY spd limit set to %s\n", fe->param.name); did_spd = true; } /* let lflags stack */ if (fe->param.lflags) { link->flags |= fe->param.lflags; ata_link_notice(link, "FORCE: link flag 0x%x forced -> 0x%x\n", fe->param.lflags, link->flags); } } } /** * ata_force_xfermask - force xfermask according to libata.force * @dev: ATA device of interest * * Force xfer_mask according to libata.force and whine about it. * For consistency with link selection, device number 15 selects * the first device connected to the host link. * * LOCKING: * EH context. */ static void ata_force_xfermask(struct ata_device *dev) { int devno = dev->link->pmp + dev->devno; int alt_devno = devno; int i; /* allow n.15/16 for devices attached to host port */ if (ata_is_host_link(dev->link)) alt_devno += 15; for (i = ata_force_tbl_size - 1; i >= 0; i--) { const struct ata_force_ent *fe = &ata_force_tbl[i]; unsigned long pio_mask, mwdma_mask, udma_mask; if (fe->port != -1 && fe->port != dev->link->ap->print_id) continue; if (fe->device != -1 && fe->device != devno && fe->device != alt_devno) continue; if (!fe->param.xfer_mask) continue; ata_unpack_xfermask(fe->param.xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); if (udma_mask) dev->udma_mask = udma_mask; else if (mwdma_mask) { dev->udma_mask = 0; dev->mwdma_mask = mwdma_mask; } else { dev->udma_mask = 0; dev->mwdma_mask = 0; dev->pio_mask = pio_mask; } ata_dev_notice(dev, "FORCE: xfer_mask set to %s\n", fe->param.name); return; } } /** * ata_force_horkage - force horkage according to libata.force * @dev: ATA device of interest * * Force horkage according to libata.force and whine about it. * For consistency with link selection, device number 15 selects * the first device connected to the host link. * * LOCKING: * EH context. */ static void ata_force_horkage(struct ata_device *dev) { int devno = dev->link->pmp + dev->devno; int alt_devno = devno; int i; /* allow n.15/16 for devices attached to host port */ if (ata_is_host_link(dev->link)) alt_devno += 15; for (i = 0; i < ata_force_tbl_size; i++) { const struct ata_force_ent *fe = &ata_force_tbl[i]; if (fe->port != -1 && fe->port != dev->link->ap->print_id) continue; if (fe->device != -1 && fe->device != devno && fe->device != alt_devno) continue; if (!(~dev->horkage & fe->param.horkage_on) && !(dev->horkage & fe->param.horkage_off)) continue; dev->horkage |= fe->param.horkage_on; dev->horkage &= ~fe->param.horkage_off; ata_dev_notice(dev, "FORCE: horkage modified (%s)\n", fe->param.name); } } #else static inline void ata_force_link_limits(struct ata_link *link) { } static inline void ata_force_xfermask(struct ata_device *dev) { } static inline void ata_force_horkage(struct ata_device *dev) { } #endif /** * atapi_cmd_type - Determine ATAPI command type from SCSI opcode * @opcode: SCSI opcode * * Determine ATAPI command type from @opcode. * * LOCKING: * None. * * RETURNS: * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC} */ int atapi_cmd_type(u8 opcode) { switch (opcode) { case GPCMD_READ_10: case GPCMD_READ_12: return ATAPI_READ; case GPCMD_WRITE_10: case GPCMD_WRITE_12: case GPCMD_WRITE_AND_VERIFY_10: return ATAPI_WRITE; case GPCMD_READ_CD: case GPCMD_READ_CD_MSF: return ATAPI_READ_CD; case ATA_16: case ATA_12: if (atapi_passthru16) return ATAPI_PASS_THRU; 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, ATA_CMD_READ_MULTI_EXT, ATA_CMD_WRITE_MULTI_EXT, 0, 0, 0, ATA_CMD_WRITE_MULTI_FUA_EXT, /* pio */ ATA_CMD_PIO_READ, ATA_CMD_PIO_WRITE, ATA_CMD_PIO_READ_EXT, ATA_CMD_PIO_WRITE_EXT, 0, 0, 0, 0, /* dma */ ATA_CMD_READ, ATA_CMD_WRITE, ATA_CMD_READ_EXT, ATA_CMD_WRITE_EXT, 0, 0, 0, ATA_CMD_WRITE_FUA_EXT }; /** * ata_rwcmd_protocol - set taskfile r/w commands and protocol * @tf: command to examine and configure * @dev: device tf belongs to * * Examine the device configuration and tf->flags to calculate * the proper read/write commands and protocol to use. * * LOCKING: * caller. */ static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) { u8 cmd; int index, fua, lba48, write; fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; if (dev->flags & ATA_DFLAG_PIO) { tf->protocol = ATA_PROT_PIO; index = dev->multi_count ? 0 : 8; } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { /* Unable to use DMA due to host limitation */ tf->protocol = ATA_PROT_PIO; index = dev->multi_count ? 0 : 8; } else { tf->protocol = ATA_PROT_DMA; index = 16; } cmd = ata_rw_cmds[index + fua + lba48 + write]; if (cmd) { tf->command = cmd; return 0; } return -1; } /** * ata_tf_read_block - Read block address from ATA taskfile * @tf: ATA taskfile of interest * @dev: ATA device @tf belongs to * * LOCKING: * None. * * Read block address from @tf. This function can handle all * three address formats - LBA, LBA48 and CHS. tf->protocol and * flags select the address format to use. * * RETURNS: * Block address read from @tf. */ u64 ata_tf_read_block(const struct ata_taskfile *tf, struct ata_device *dev) { u64 block = 0; if (tf->flags & ATA_TFLAG_LBA) { if (tf->flags & ATA_TFLAG_LBA48) { block |= (u64)tf->hob_lbah << 40; block |= (u64)tf->hob_lbam << 32; block |= (u64)tf->hob_lbal << 24; } else block |= (tf->device & 0xf) << 24; block |= tf->lbah << 16; block |= tf->lbam << 8; block |= tf->lbal; } else { u32 cyl, head, sect; cyl = tf->lbam | (tf->lbah << 8); head = tf->device & 0xf; sect = tf->lbal; if (!sect) { ata_dev_warn(dev, "device reported invalid CHS sector 0\n"); return U64_MAX; } block = (cyl * dev->heads + head) * dev->sectors + sect - 1; } return block; } /** * ata_build_rw_tf - Build ATA taskfile for given read/write request * @tf: Target ATA taskfile * @dev: ATA device @tf belongs to * @block: Block address * @n_block: Number of blocks * @tf_flags: RW/FUA etc... * @tag: tag * @class: IO priority class * * LOCKING: * None. * * Build ATA taskfile @tf for read/write request described by * @block, @n_block, @tf_flags and @tag on @dev. * * RETURNS: * * 0 on success, -ERANGE if the request is too large for @dev, * -EINVAL if the request is invalid. */ int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, u64 block, u32 n_block, unsigned int tf_flags, unsigned int tag, int class) { tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; tf->flags |= tf_flags; if (ata_ncq_enabled(dev) && !ata_tag_internal(tag)) { /* yay, NCQ */ if (!lba_48_ok(block, n_block)) return -ERANGE; tf->protocol = ATA_PROT_NCQ; tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; if (tf->flags & ATA_TFLAG_WRITE) tf->command = ATA_CMD_FPDMA_WRITE; else tf->command = ATA_CMD_FPDMA_READ; tf->nsect = tag << 3; tf->hob_feature = (n_block >> 8) & 0xff; tf->feature = n_block & 0xff; tf->hob_lbah = (block >> 40) & 0xff; tf->hob_lbam = (block >> 32) & 0xff; tf->hob_lbal = (block >> 24) & 0xff; tf->lbah = (block >> 16) & 0xff; tf->lbam = (block >> 8) & 0xff; tf->lbal = block & 0xff; tf->device = ATA_LBA; if (tf->flags & ATA_TFLAG_FUA) tf->device |= 1 << 7; if (dev->flags & ATA_DFLAG_NCQ_PRIO) { if (class == IOPRIO_CLASS_RT) tf->hob_nsect |= ATA_PRIO_HIGH << ATA_SHIFT_PRIO; } } else if (dev->flags & ATA_DFLAG_LBA) { tf->flags |= ATA_TFLAG_LBA; if (lba_28_ok(block, n_block)) { /* use LBA28 */ tf->device |= (block >> 24) & 0xf; } else if (lba_48_ok(block, n_block)) { if (!(dev->flags & ATA_DFLAG_LBA48)) return -ERANGE; /* use LBA48 */ tf->flags |= ATA_TFLAG_LBA48; tf->hob_nsect = (n_block >> 8) & 0xff; tf->hob_lbah = (block >> 40) & 0xff; tf->hob_lbam = (block >> 32) & 0xff; tf->hob_lbal = (block >> 24) & 0xff; } else /* request too large even for LBA48 */ return -ERANGE; if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) return -EINVAL; tf->nsect = n_block & 0xff; tf->lbah = (block >> 16) & 0xff; tf->lbam = (block >> 8) & 0xff; tf->lbal = block & 0xff; tf->device |= ATA_LBA; } else { /* CHS */ u32 sect, head, cyl, track; /* The request -may- be too large for CHS addressing. */ if (!lba_28_ok(block, n_block)) return -ERANGE; if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) return -EINVAL; /* Convert LBA to CHS */ track = (u32)block / dev->sectors; cyl = track / dev->heads; head = track % dev->heads; sect = (u32)block % dev->sectors + 1; DPRINTK("block %u track %u cyl %u head %u sect %u\n", (u32)block, track, cyl, head, sect); /* Check whether the converted CHS can fit. Cylinder: 0-65535 Head: 0-15 Sector: 1-255*/ if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) return -ERANGE; tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ tf->lbal = sect; tf->lbam = cyl; tf->lbah = cyl >> 8; tf->device |= head; } return 0; } /** * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask * @pio_mask: pio_mask * @mwdma_mask: mwdma_mask * @udma_mask: udma_mask * * Pack @pio_mask, @mwdma_mask and @udma_mask into a single * unsigned int xfer_mask. * * LOCKING: * None. * * RETURNS: * Packed xfer_mask. */ unsigned long ata_pack_xfermask(unsigned long pio_mask, unsigned long mwdma_mask, unsigned long udma_mask) { return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); } EXPORT_SYMBOL_GPL(ata_pack_xfermask); /** * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks * @xfer_mask: xfer_mask to unpack * @pio_mask: resulting pio_mask * @mwdma_mask: resulting mwdma_mask * @udma_mask: resulting udma_mask * * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. * Any NULL destination masks will be ignored. */ void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask, unsigned long *mwdma_mask, unsigned long *udma_mask) { if (pio_mask) *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; if (mwdma_mask) *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; if (udma_mask) *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; } static const struct ata_xfer_ent { int shift, bits; u8 base; } ata_xfer_tbl[] = { { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 }, { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 }, { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 }, { -1, }, }; /** * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask * @xfer_mask: xfer_mask of interest * * Return matching XFER_* value for @xfer_mask. Only the highest * bit of @xfer_mask is considered. * * LOCKING: * None. * * RETURNS: * Matching XFER_* value, 0xff if no match found. */ u8 ata_xfer_mask2mode(unsigned long xfer_mask) { int highbit = fls(xfer_mask) - 1; const struct ata_xfer_ent *ent; for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) if (highbit >= ent->shift && highbit < ent->shift + ent->bits) return ent->base + highbit - ent->shift; return 0xff; } EXPORT_SYMBOL_GPL(ata_xfer_mask2mode); /** * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* * @xfer_mode: XFER_* of interest * * Return matching xfer_mask for @xfer_mode. * * LOCKING: * None. * * RETURNS: * Matching xfer_mask, 0 if no match found. */ unsigned long ata_xfer_mode2mask(u8 xfer_mode) { const struct ata_xfer_ent *ent; for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) return ((2 << (ent->shift + xfer_mode - ent->base)) - 1) & ~((1 << ent->shift) - 1); return 0; } EXPORT_SYMBOL_GPL(ata_xfer_mode2mask); /** * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* * @xfer_mode: XFER_* of interest * * Return matching xfer_shift for @xfer_mode. * * LOCKING: * None. * * RETURNS: * Matching xfer_shift, -1 if no match found. */ int ata_xfer_mode2shift(unsigned long xfer_mode) { const struct ata_xfer_ent *ent; for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) return ent->shift; return -1; } EXPORT_SYMBOL_GPL(ata_xfer_mode2shift); /** * ata_mode_string - convert xfer_mask to string * @xfer_mask: mask of bits supported; only highest bit counts. * * Determine string which represents the highest speed * (highest bit in @modemask). * * LOCKING: * None. * * RETURNS: * Constant C string representing highest speed listed in * @mode_mask, or the constant C string "<n/a>". */ const char *ata_mode_string(unsigned long xfer_mask) { static const char * const xfer_mode_str[] = { "PIO0", "PIO1", "PIO2", "PIO3", "PIO4", "PIO5", "PIO6", "MWDMA0", "MWDMA1", "MWDMA2", "MWDMA3", "MWDMA4", "UDMA/16", "UDMA/25", "UDMA/33", "UDMA/44", "UDMA/66", "UDMA/100", "UDMA/133", "UDMA7", }; int highbit; highbit = fls(xfer_mask) - 1; if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) return xfer_mode_str[highbit]; return "<n/a>"; } EXPORT_SYMBOL_GPL(ata_mode_string); const char *sata_spd_string(unsigned int spd) { static const char * const spd_str[] = { "1.5 Gbps", "3.0 Gbps", "6.0 Gbps", }; if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) return "<unknown>"; return spd_str[spd - 1]; } /** * ata_dev_classify - determine device type based on ATA-spec signature * @tf: ATA taskfile register set for device to be identified * * Determine from taskfile register contents whether a device is * ATA or ATAPI, as per "Signature and persistence" section * of ATA/PI spec (volume 1, sect 5.14). * * LOCKING: * None. * * RETURNS: * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP, * %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure. */ unsigned int ata_dev_classify(const struct ata_taskfile *tf) { /* Apple's open source Darwin code hints that some devices only * put a proper signature into the LBA mid/high registers, * So, we only check those. It's sufficient for uniqueness. * * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate * signatures for ATA and ATAPI devices attached on SerialATA, * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA * spec has never mentioned about using different signatures * for ATA/ATAPI devices. Then, Serial ATA II: Port * Multiplier specification began to use 0x69/0x96 to identify * port multpliers and 0x3c/0xc3 to identify SEMB device. * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and * 0x69/0x96 shortly and described them as reserved for * SerialATA. * * We follow the current spec and consider that 0x69/0x96 * identifies a port multiplier and 0x3c/0xc3 a SEMB device. * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports * SEMB signature. This is worked around in * ata_dev_read_id(). */ if ((tf->lbam == 0) && (tf->lbah == 0)) { DPRINTK("found ATA device by sig\n"); return ATA_DEV_ATA; } if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) { DPRINTK("found ATAPI device by sig\n"); return ATA_DEV_ATAPI; } if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) { DPRINTK("found PMP device by sig\n"); return ATA_DEV_PMP; } if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) { DPRINTK("found SEMB device by sig (could be ATA device)\n"); return ATA_DEV_SEMB; } if ((tf->lbam == 0xcd) && (tf->lbah == 0xab)) { DPRINTK("found ZAC device by sig\n"); return ATA_DEV_ZAC; } DPRINTK("unknown device\n"); return ATA_DEV_UNKNOWN; } EXPORT_SYMBOL_GPL(ata_dev_classify); /** * ata_id_string - Convert IDENTIFY DEVICE page into string * @id: IDENTIFY DEVICE results we will examine * @s: string into which data is output * @ofs: offset into identify device page * @len: length of string to return. must be an even number. * * The strings in the IDENTIFY DEVICE page are broken up into * 16-bit chunks. Run through the string, and output each * 8-bit chunk linearly, regardless of platform. * * LOCKING: * caller. */ void ata_id_string(const u16 *id, unsigned char *s, unsigned int ofs, unsigned int len) { unsigned int c; BUG_ON(len & 1); while (len > 0) { c = id[ofs] >> 8; *s = c; s++; c = id[ofs] & 0xff; *s = c; s++; ofs++; len -= 2; } } EXPORT_SYMBOL_GPL(ata_id_string); /** * ata_id_c_string - Convert IDENTIFY DEVICE page into C string * @id: IDENTIFY DEVICE results we will examine * @s: string into which data is output * @ofs: offset into identify device page * @len: length of string to return. must be an odd number. * * This function is identical to ata_id_string except that it * trims trailing spaces and terminates the resulting string with * null. @len must be actual maximum length (even number) + 1. * * LOCKING: * caller. */ void ata_id_c_string(const u16 *id, unsigned char *s, unsigned int ofs, unsigned int len) { unsigned char *p; ata_id_string(id, s, ofs, len - 1); p = s + strnlen(s, len - 1); while (p > s && p[-1] == ' ') p--; *p = '\0'; } EXPORT_SYMBOL_GPL(ata_id_c_string); static u64 ata_id_n_sectors(const u16 *id) { if (ata_id_has_lba(id)) { if (ata_id_has_lba48(id)) return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2); else return ata_id_u32(id, ATA_ID_LBA_CAPACITY); } else { if (ata_id_current_chs_valid(id)) return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] * id[ATA_ID_CUR_SECTORS]; else return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] * id[ATA_ID_SECTORS]; } } u64 ata_tf_to_lba48(const struct ata_taskfile *tf) { u64 sectors = 0; sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24; sectors |= (tf->lbah & 0xff) << 16; sectors |= (tf->lbam & 0xff) << 8; sectors |= (tf->lbal & 0xff); return sectors; } u64 ata_tf_to_lba(const struct ata_taskfile *tf) { u64 sectors = 0; sectors |= (tf->device & 0x0f) << 24; sectors |= (tf->lbah & 0xff) << 16; sectors |= (tf->lbam & 0xff) << 8; sectors |= (tf->lbal & 0xff); return sectors; } /** * ata_read_native_max_address - Read native max address * @dev: target device * @max_sectors: out parameter for the result native max address * * Perform an LBA48 or LBA28 native size query upon the device in * question. * * RETURNS: * 0 on success, -EACCES if command is aborted by the drive. * -EIO on other errors. */ static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors) { unsigned int err_mask; struct ata_taskfile tf; int lba48 = ata_id_has_lba48(dev->id); ata_tf_init(dev, &tf); /* always clear all address registers */ tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; if (lba48) { tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; tf.flags |= ATA_TFLAG_LBA48; } else tf.command = ATA_CMD_READ_NATIVE_MAX; tf.protocol = ATA_PROT_NODATA; tf.device |= ATA_LBA; err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); if (err_mask) { ata_dev_warn(dev, "failed to read native max address (err_mask=0x%x)\n", err_mask); if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) return -EACCES; return -EIO; } if (lba48) *max_sectors = ata_tf_to_lba48(&tf) + 1; else *max_sectors = ata_tf_to_lba(&tf) + 1; if (dev->horkage & ATA_HORKAGE_HPA_SIZE) (*max_sectors)--; return 0; } /** * ata_set_max_sectors - Set max sectors * @dev: target device * @new_sectors: new max sectors value to set for the device * * Set max sectors of @dev to @new_sectors. * * RETURNS: * 0 on success, -EACCES if command is aborted or denied (due to * previous non-volatile SET_MAX) by the drive. -EIO on other * errors. */ static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors) { unsigned int err_mask; struct ata_taskfile tf; int lba48 = ata_id_has_lba48(dev->id); new_sectors--; ata_tf_init(dev, &tf); tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; if (lba48) { tf.command = ATA_CMD_SET_MAX_EXT; tf.flags |= ATA_TFLAG_LBA48; tf.hob_lbal = (new_sectors >> 24) & 0xff; tf.hob_lbam = (new_sectors >> 32) & 0xff; tf.hob_lbah = (new_sectors >> 40) & 0xff; } else { tf.command = ATA_CMD_SET_MAX; tf.device |= (new_sectors >> 24) & 0xf; } tf.protocol = ATA_PROT_NODATA; tf.device |= ATA_LBA; tf.lbal = (new_sectors >> 0) & 0xff; tf.lbam = (new_sectors >> 8) & 0xff; tf.lbah = (new_sectors >> 16) & 0xff; err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); if (err_mask) { ata_dev_warn(dev, "failed to set max address (err_mask=0x%x)\n", err_mask); if (err_mask == AC_ERR_DEV && (tf.feature & (ATA_ABORTED | ATA_IDNF))) return -EACCES; return -EIO; } return 0; } /** * ata_hpa_resize - Resize a device with an HPA set * @dev: Device to resize * * Read the size of an LBA28 or LBA48 disk with HPA features and resize * it if required to the full size of the media. The caller must check * the drive has the HPA feature set enabled. * * RETURNS: * 0 on success, -errno on failure. */ static int ata_hpa_resize(struct ata_device *dev) { struct ata_eh_context *ehc = &dev->link->eh_context; int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA; u64 sectors = ata_id_n_sectors(dev->id); u64 native_sectors; int rc; /* do we need to do it? */ if ((dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) || !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || (dev->horkage & ATA_HORKAGE_BROKEN_HPA)) return 0; /* read native max address */ rc = ata_read_native_max_address(dev, &native_sectors); if (rc) { /* If device aborted the command or HPA isn't going to * be unlocked, skip HPA resizing. */ if (rc == -EACCES || !unlock_hpa) { ata_dev_warn(dev, "HPA support seems broken, skipping HPA handling\n"); dev->horkage |= ATA_HORKAGE_BROKEN_HPA; /* we can continue if device aborted the command */ if (rc == -EACCES) rc = 0; } return rc; } dev->n_native_sectors = native_sectors; /* nothing to do? */ if (native_sectors <= sectors || !unlock_hpa) { if (!print_info || native_sectors == sectors) return 0; if (native_sectors > sectors) ata_dev_info(dev, "HPA detected: current %llu, native %llu\n", (unsigned long long)sectors, (unsigned long long)native_sectors); else if (native_sectors < sectors) ata_dev_warn(dev, "native sectors (%llu) is smaller than sectors (%llu)\n", (unsigned long long)native_sectors, (unsigned long long)sectors); return 0; } /* let's unlock HPA */ rc = ata_set_max_sectors(dev, native_sectors); if (rc == -EACCES) { /* if device aborted the command, skip HPA resizing */ ata_dev_warn(dev, "device aborted resize (%llu -> %llu), skipping HPA handling\n", (unsigned long long)sectors, (unsigned long long)native_sectors); dev->horkage |= ATA_HORKAGE_BROKEN_HPA; return 0; } else if (rc) return rc; /* re-read IDENTIFY data */ rc = ata_dev_reread_id(dev, 0); if (rc) { ata_dev_err(dev, "failed to re-read IDENTIFY data after HPA resizing\n"); return rc; } if (print_info) { u64 new_sectors = ata_id_n_sectors(dev->id); ata_dev_info(dev, "HPA unlocked: %llu -> %llu, native %llu\n", (unsigned long long)sectors, (unsigned long long)new_sectors, (unsigned long long)native_sectors); } return 0; } /** * ata_dump_id - IDENTIFY DEVICE info debugging output * @id: IDENTIFY DEVICE page to dump * * Dump selected 16-bit words from the given IDENTIFY DEVICE * page. * * LOCKING: * caller. */ static inline void ata_dump_id(const u16 *id) { DPRINTK("49==0x%04x " "53==0x%04x " "63==0x%04x " "64==0x%04x " "75==0x%04x \n", id[49], id[53], id[63], id[64], id[75]); DPRINTK("80==0x%04x " "81==0x%04x " "82==0x%04x " "83==0x%04x " "84==0x%04x \n", id[80], id[81], id[82], id[83], id[84]); DPRINTK("88==0x%04x " "93==0x%04x\n", id[88], id[93]); } /** * ata_id_xfermask - Compute xfermask from the given IDENTIFY data * @id: IDENTIFY data to compute xfer mask from * * Compute the xfermask for this device. This is not as trivial * as it seems if we must consider early devices correctly. * * FIXME: pre IDE drive timing (do we care ?). * * LOCKING: * None. * * RETURNS: * Computed xfermask */ unsigned long ata_id_xfermask(const u16 *id) { unsigned long pio_mask, mwdma_mask, udma_mask; /* Usual case. Word 53 indicates word 64 is valid */ if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { pio_mask = id[ATA_ID_PIO_MODES] & 0x03; pio_mask <<= 3; pio_mask |= 0x7; } else { /* If word 64 isn't valid then Word 51 high byte holds * the PIO timing number for the maximum. Turn it into * a mask. */ u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; if (mode < 5) /* Valid PIO range */ pio_mask = (2 << mode) - 1; else pio_mask = 1; /* But wait.. there's more. Design your standards by * committee and you too can get a free iordy field to * process. However its the speeds not the modes that * are supported... Note drivers using the timing API * will get this right anyway */ } mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; if (ata_id_is_cfa(id)) { /* * Process compact flash extended modes */ int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7; int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7; if (pio) pio_mask |= (1 << 5); if (pio > 1) pio_mask |= (1 << 6); if (dma) mwdma_mask |= (1 << 3); if (dma > 1) mwdma_mask |= (1 << 4); } udma_mask = 0; if (id[ATA_ID_FIELD_VALID] & (1 << 2)) udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); } EXPORT_SYMBOL_GPL(ata_id_xfermask); static void ata_qc_complete_internal(struct ata_queued_cmd *qc) { struct completion *waiting = qc->private_data; complete(waiting); } /** * ata_exec_internal_sg - execute libata internal command * @dev: Device to which the command is sent * @tf: Taskfile registers for the command and the result * @cdb: CDB for packet command * @dma_dir: Data transfer direction of the command * @sgl: sg list for the data buffer of the command * @n_elem: Number of sg entries * @timeout: Timeout in msecs (0 for default) * * Executes libata internal command with timeout. @tf contains * command on entry and result on return. Timeout and error * conditions are reported via return value. No recovery action * is taken after a command times out. It's caller's duty to * clean up after timeout. * * LOCKING: * None. Should be called with kernel context, might sleep. * * RETURNS: * Zero on success, AC_ERR_* mask on failure */ unsigned ata_exec_internal_sg(struct ata_device *dev, struct ata_taskfile *tf, const u8 *cdb, int dma_dir, struct scatterlist *sgl, unsigned int n_elem, unsigned long timeout) { struct ata_link *link = dev->link; struct ata_port *ap = link->ap; u8 command = tf->command; int auto_timeout = 0; struct ata_queued_cmd *qc; unsigned int preempted_tag; u32 preempted_sactive; u64 preempted_qc_active; int preempted_nr_active_links; DECLARE_COMPLETION_ONSTACK(wait); unsigned long flags; unsigned int err_mask; int rc; spin_lock_irqsave(ap->lock, flags); /* no internal command while frozen */ if (ap->pflags & ATA_PFLAG_FROZEN) { spin_unlock_irqrestore(ap->lock, flags); return AC_ERR_SYSTEM; } /* initialize internal qc */ qc = __ata_qc_from_tag(ap, ATA_TAG_INTERNAL); qc->tag = ATA_TAG_INTERNAL; qc->hw_tag = 0; qc->scsicmd = NULL; qc->ap = ap; qc->dev = dev; ata_qc_reinit(qc); preempted_tag = link->active_tag; preempted_sactive = link->sactive; preempted_qc_active = ap->qc_active; preempted_nr_active_links = ap->nr_active_links; link->active_tag = ATA_TAG_POISON; link->sactive = 0; ap->qc_active = 0; ap->nr_active_links = 0; /* prepare & issue qc */ qc->tf = *tf; if (cdb) memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); /* some SATA bridges need us to indicate data xfer direction */ if (tf->protocol == ATAPI_PROT_DMA && (dev->flags & ATA_DFLAG_DMADIR) && dma_dir == DMA_FROM_DEVICE) qc->tf.feature |= ATAPI_DMADIR; qc->flags |= ATA_QCFLAG_RESULT_TF; qc->dma_dir = dma_dir; if (dma_dir != DMA_NONE) { unsigned int i, buflen = 0; struct scatterlist *sg; for_each_sg(sgl, sg, n_elem, i) buflen += sg->length; ata_sg_init(qc, sgl, n_elem); qc->nbytes = buflen; } qc->private_data = &wait; qc->complete_fn = ata_qc_complete_internal; ata_qc_issue(qc); spin_unlock_irqrestore(ap->lock, flags); if (!timeout) { if (ata_probe_timeout) timeout = ata_probe_timeout * 1000; else { timeout = ata_internal_cmd_timeout(dev, command); auto_timeout = 1; } } if (ap->ops->error_handler) ata_eh_release(ap); rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout)); if (ap->ops->error_handler) ata_eh_acquire(ap); ata_sff_flush_pio_task(ap); if (!rc) { spin_lock_irqsave(ap->lock, flags); /* We're racing with irq here. If we lose, the * following test prevents us from completing the qc * twice. If we win, the port is frozen and will be * cleaned up by ->post_internal_cmd(). */ if (qc->flags & ATA_QCFLAG_ACTIVE) { qc->err_mask |= AC_ERR_TIMEOUT; if (ap->ops->error_handler) ata_port_freeze(ap); else ata_qc_complete(qc); if (ata_msg_warn(ap)) ata_dev_warn(dev, "qc timeout (cmd 0x%x)\n", command); } spin_unlock_irqrestore(ap->lock, flags); } /* do post_internal_cmd */ if (ap->ops->post_internal_cmd) ap->ops->post_internal_cmd(qc); /* perform minimal error analysis */ if (qc->flags & ATA_QCFLAG_FAILED) { if (qc->result_tf.command & (ATA_ERR | ATA_DF)) qc->err_mask |= AC_ERR_DEV; if (!qc->err_mask) qc->err_mask |= AC_ERR_OTHER; if (qc->err_mask & ~AC_ERR_OTHER) qc->err_mask &= ~AC_ERR_OTHER; } else if (qc->tf.command == ATA_CMD_REQ_SENSE_DATA) { qc->result_tf.command |= ATA_SENSE; } /* finish up */ spin_lock_irqsave(ap->lock, flags); *tf = qc->result_tf; err_mask = qc->err_mask; ata_qc_free(qc); link->active_tag = preempted_tag; link->sactive = preempted_sactive; ap->qc_active = preempted_qc_active; ap->nr_active_links = preempted_nr_active_links; spin_unlock_irqrestore(ap->lock, flags); if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout) ata_internal_cmd_timed_out(dev, command); return err_mask; } /** * ata_exec_internal - execute libata internal command * @dev: Device to which the command is sent * @tf: Taskfile registers for the command and the result * @cdb: CDB for packet command * @dma_dir: Data transfer direction of the command * @buf: Data buffer of the command * @buflen: Length of data buffer * @timeout: Timeout in msecs (0 for default) * * Wrapper around ata_exec_internal_sg() which takes simple * buffer instead of sg list. * * LOCKING: * None. Should be called with kernel context, might sleep. * * RETURNS: * Zero on success, AC_ERR_* mask on failure */ unsigned ata_exec_internal(struct ata_device *dev, struct ata_taskfile *tf, const u8 *cdb, int dma_dir, void *buf, unsigned int buflen, unsigned long timeout) { struct scatterlist *psg = NULL, sg; unsigned int n_elem = 0; if (dma_dir != DMA_NONE) { WARN_ON(!buf); sg_init_one(&sg, buf, buflen); psg = &sg; n_elem++; } return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem, timeout); } /** * ata_pio_need_iordy - check if iordy needed * @adev: ATA device * * Check if the current speed of the device requires IORDY. Used * by various controllers for chip configuration. */ unsigned int ata_pio_need_iordy(const struct ata_device *adev) { /* Don't set IORDY if we're preparing for reset. IORDY may * lead to controller lock up on certain controllers if the * port is not occupied. See bko#11703 for details. */ if (adev->link->ap->pflags & ATA_PFLAG_RESETTING) return 0; /* Controller doesn't support IORDY. Probably a pointless * check as the caller should know this. */ if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) return 0; /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */ if (ata_id_is_cfa(adev->id) && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6)) return 0; /* PIO3 and higher it is mandatory */ if (adev->pio_mode > XFER_PIO_2) return 1; /* We turn it on when possible */ if (ata_id_has_iordy(adev->id)) return 1; return 0; } EXPORT_SYMBOL_GPL(ata_pio_need_iordy); /** * ata_pio_mask_no_iordy - Return the non IORDY mask * @adev: ATA device * * Compute the highest mode possible if we are not using iordy. Return * -1 if no iordy mode is available. */ static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) { /* If we have no drive specific rule, then PIO 2 is non IORDY */ if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ u16 pio = adev->id[ATA_ID_EIDE_PIO]; /* Is the speed faster than the drive allows non IORDY ? */ if (pio) { /* This is cycle times not frequency - watch the logic! */ if (pio > 240) /* PIO2 is 240nS per cycle */ return 3 << ATA_SHIFT_PIO; return 7 << ATA_SHIFT_PIO; } } return 3 << ATA_SHIFT_PIO; } /** * ata_do_dev_read_id - default ID read method * @dev: device * @tf: proposed taskfile * @id: data buffer * * Issue the identify taskfile and hand back the buffer containing * identify data. For some RAID controllers and for pre ATA devices * this function is wrapped or replaced by the driver */ unsigned int ata_do_dev_read_id(struct ata_device *dev, struct ata_taskfile *tf, u16 *id) { return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE, id, sizeof(id[0]) * ATA_ID_WORDS, 0); } EXPORT_SYMBOL_GPL(ata_do_dev_read_id); /** * ata_dev_read_id - Read ID data from the specified device * @dev: target device * @p_class: pointer to class of the target device (may be changed) * @flags: ATA_READID_* flags * @id: buffer to read IDENTIFY data into * * Read ID data from the specified device. ATA_CMD_ID_ATA is * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS * for pre-ATA4 drives. * * FIXME: ATA_CMD_ID_ATA is optional for early drives and right * now we abort if we hit that case. * * LOCKING: * Kernel thread context (may sleep) * * RETURNS: * 0 on success, -errno otherwise. */ int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, unsigned int flags, u16 *id) { struct ata_port *ap = dev->link->ap; unsigned int class = *p_class; struct ata_taskfile tf; unsigned int err_mask = 0; const char *reason; bool is_semb = class == ATA_DEV_SEMB; int may_fallback = 1, tried_spinup = 0; int rc; if (ata_msg_ctl(ap)) ata_dev_dbg(dev, "%s: ENTER\n", __func__); retry: ata_tf_init(dev, &tf); switch (class) { case ATA_DEV_SEMB: class = ATA_DEV_ATA; /* some hard drives report SEMB sig */ 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 && dma) { dev->horkage |= ATA_HORKAGE_NO_DMA_LOG; ata_dev_warn(dev, "READ LOG DMA EXT failed, trying PIO\n"); goto retry; } DPRINTK("EXIT, err_mask=%x\n", err_mask); return err_mask; } static bool ata_log_supported(struct ata_device *dev, u8 log) { struct ata_port *ap = dev->link->ap; if (ata_read_log_page(dev, ATA_LOG_DIRECTORY, 0, ap->sector_buf, 1)) return false; return get_unaligned_le16(&ap->sector_buf[log * 2]) ? true : false; } static bool ata_identify_page_supported(struct ata_device *dev, u8 page) { struct ata_port *ap = dev->link->ap; unsigned int err, i; if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE)) { ata_dev_warn(dev, "ATA Identify Device Log not supported\n"); return false; } /* * Read IDENTIFY DEVICE data log, page 0, to figure out if the page is * supported. */ err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 0, ap->sector_buf, 1); if (err) { ata_dev_info(dev, "failed to get Device Identify Log Emask 0x%x\n", err); return false; } for (i = 0; i < ap->sector_buf[8]; i++) { if (ap->sector_buf[9 + i] == page) return true; } return false; } static int ata_do_link_spd_horkage(struct ata_device *dev) { struct ata_link *plink = ata_dev_phys_link(dev); u32 target, target_limit; if (!sata_scr_valid(plink)) return 0; if (dev->horkage & ATA_HORKAGE_1_5_GBPS) target = 1; else return 0; target_limit = (1 << target) - 1; /* if already on stricter limit, no need to push further */ if (plink->sata_spd_limit <= target_limit) return 0; plink->sata_spd_limit = target_limit; /* Request another EH round by returning -EAGAIN if link is * going faster than the target speed. Forward progress is * guaranteed by setting sata_spd_limit to target_limit above. */ if (plink->sata_spd > target) { ata_dev_info(dev, "applying link speed limit horkage to %s\n", sata_spd_string(target)); return -EAGAIN; } return 0; } static inline u8 ata_dev_knobble(struct ata_device *dev) { struct ata_port *ap = dev->link->ap; if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK) return 0; return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); } static void ata_dev_config_ncq_send_recv(struct ata_device *dev) { struct ata_port *ap = dev->link->ap; unsigned int err_mask; if (!ata_log_supported(dev, ATA_LOG_NCQ_SEND_RECV)) { ata_dev_warn(dev, "NCQ Send/Recv Log not supported\n"); return; } err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_SEND_RECV, 0, ap->sector_buf, 1); if (err_mask) { ata_dev_dbg(dev, "failed to get NCQ Send/Recv Log Emask 0x%x\n", err_mask); } else { u8 *cmds = dev->ncq_send_recv_cmds; dev->flags |= ATA_DFLAG_NCQ_SEND_RECV; memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_SEND_RECV_SIZE); if (dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) { ata_dev_dbg(dev, "disabling queued TRIM support\n"); cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &= ~ATA_LOG_NCQ_SEND_RECV_DSM_TRIM; } } } static void ata_dev_config_ncq_non_data(struct ata_device *dev) { struct ata_port *ap = dev->link->ap; unsigned int err_mask; if (!ata_log_supported(dev, ATA_LOG_NCQ_NON_DATA)) { ata_dev_warn(dev, "NCQ Send/Recv Log not supported\n"); return; } err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_NON_DATA, 0, ap->sector_buf, 1); if (err_mask) { ata_dev_dbg(dev, "failed to get NCQ Non-Data Log Emask 0x%x\n", err_mask); } else { u8 *cmds = dev->ncq_non_data_cmds; memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_NON_DATA_SIZE); } } static void ata_dev_config_ncq_prio(struct ata_device *dev) { struct ata_port *ap = dev->link->ap; unsigned int err_mask; if (!(dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE)) { dev->flags &= ~ATA_DFLAG_NCQ_PRIO; return; } err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, ATA_LOG_SATA_SETTINGS, ap->sector_buf, 1); if (err_mask) { ata_dev_dbg(dev, "failed to get Identify Device data, Emask 0x%x\n", err_mask); return; } if (ap->sector_buf[ATA_LOG_NCQ_PRIO_OFFSET] & BIT(3)) { dev->flags |= ATA_DFLAG_NCQ_PRIO; } else { dev->flags &= ~ATA_DFLAG_NCQ_PRIO; ata_dev_dbg(dev, "SATA page does not support priority\n"); } } static int ata_dev_config_ncq(struct ata_device *dev, char *desc, size_t desc_sz) { struct ata_port *ap = dev->link->ap; int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); unsigned int err_mask; char *aa_desc = ""; if (!ata_id_has_ncq(dev->id)) { desc[0] = '\0'; return 0; } if (!IS_ENABLED(CONFIG_SATA_HOST)) return 0; if (dev->horkage & ATA_HORKAGE_NONCQ) { snprintf(desc, desc_sz, "NCQ (not used)"); return 0; } if (ap->flags & ATA_FLAG_NCQ) { hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE); dev->flags |= ATA_DFLAG_NCQ; } if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) && (ap->flags & ATA_FLAG_FPDMA_AA) && ata_id_has_fpdma_aa(dev->id)) { err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE, SATA_FPDMA_AA); if (err_mask) { ata_dev_err(dev, "failed to enable AA (error_mask=0x%x)\n", err_mask); if (err_mask != AC_ERR_DEV) { dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA; return -EIO; } } else aa_desc = ", AA"; } if (hdepth >= ddepth) snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc); else snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth, ddepth, aa_desc); if ((ap->flags & ATA_FLAG_FPDMA_AUX)) { if (ata_id_has_ncq_send_and_recv(dev->id)) ata_dev_config_ncq_send_recv(dev); if (ata_id_has_ncq_non_data(dev->id)) ata_dev_config_ncq_non_data(dev); if (ata_id_has_ncq_prio(dev->id)) ata_dev_config_ncq_prio(dev); } return 0; } static void ata_dev_config_sense_reporting(struct ata_device *dev) { unsigned int err_mask; if (!ata_id_has_sense_reporting(dev->id)) return; if (ata_id_sense_reporting_enabled(dev->id)) return; err_mask = ata_dev_set_feature(dev, SETFEATURE_SENSE_DATA, 0x1); if (err_mask) { ata_dev_dbg(dev, "failed to enable Sense Data Reporting, Emask 0x%x\n", err_mask); } } static void ata_dev_config_zac(struct ata_device *dev) { struct ata_port *ap = dev->link->ap; unsigned int err_mask; u8 *identify_buf = ap->sector_buf; dev->zac_zones_optimal_open = U32_MAX; dev->zac_zones_optimal_nonseq = U32_MAX; dev->zac_zones_max_open = U32_MAX; /* * Always set the 'ZAC' flag for Host-managed devices. */ if (dev->class == ATA_DEV_ZAC) dev->flags |= ATA_DFLAG_ZAC; else if (ata_id_zoned_cap(dev->id) == 0x01) /* * Check for host-aware devices. */ dev->flags |= ATA_DFLAG_ZAC; if (!(dev->flags & ATA_DFLAG_ZAC)) return; if (!ata_identify_page_supported(dev, ATA_LOG_ZONED_INFORMATION)) { ata_dev_warn(dev, "ATA Zoned Information Log not supported\n"); return; } /* * Read IDENTIFY DEVICE data log, page 9 (Zoned-device information) */ err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, ATA_LOG_ZONED_INFORMATION, identify_buf, 1); if (!err_mask) { u64 zoned_cap, opt_open, opt_nonseq, max_open; zoned_cap = get_unaligned_le64(&identify_buf[8]); if ((zoned_cap >> 63)) dev->zac_zoned_cap = (zoned_cap & 1); opt_open = get_unaligned_le64(&identify_buf[24]); if ((opt_open >> 63)) dev->zac_zones_optimal_open = (u32)opt_open; opt_nonseq = get_unaligned_le64(&identify_buf[32]); if ((opt_nonseq >> 63)) dev->zac_zones_optimal_nonseq = (u32)opt_nonseq; max_open = get_unaligned_le64(&identify_buf[40]); if ((max_open >> 63)) dev->zac_zones_max_open = (u32)max_open; } } static void ata_dev_config_trusted(struct ata_device *dev) { struct ata_port *ap = dev->link->ap; u64 trusted_cap; unsigned int err; if (!ata_id_has_trusted(dev->id)) return; if (!ata_identify_page_supported(dev, ATA_LOG_SECURITY)) { ata_dev_warn(dev, "Security Log not supported\n"); return; } err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, ATA_LOG_SECURITY, ap->sector_buf, 1); if (err) { ata_dev_dbg(dev, "failed to read Security Log, Emask 0x%x\n", err); return; } trusted_cap = get_unaligned_le64(&ap->sector_buf[40]); if (!(trusted_cap & (1ULL << 63))) { ata_dev_dbg(dev, "Trusted Computing capability qword not valid!\n"); return; } if (trusted_cap & (1 << 0)) dev->flags |= ATA_DFLAG_TRUSTED; } /** * ata_dev_configure - Configure the specified ATA/ATAPI device * @dev: Target device to configure * * Configure @dev according to @dev->id. Generic and low-level * driver specific fixups are also applied. * * LOCKING: * Kernel thread context (may sleep) * * RETURNS: * 0 on success, -errno otherwise */ int ata_dev_configure(struct ata_device *dev) { struct ata_port *ap = dev->link->ap; struct ata_eh_context *ehc = &dev->link->eh_context; int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; const u16 *id = dev->id; unsigned long xfer_mask; unsigned int err_mask; char revbuf[7]; /* XYZ-99\0 */ char fwrevbuf[ATA_ID_FW_REV_LEN+1]; char modelbuf[ATA_ID_PROD_LEN+1]; int rc; if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { ata_dev_info(dev, "%s: ENTER/EXIT -- nodev\n", __func__); return 0; } if (ata_msg_probe(ap)) ata_dev_dbg(dev, "%s: ENTER\n", __func__); /* set horkage */ dev->horkage |= ata_dev_blacklisted(dev); ata_force_horkage(dev); if (dev->horkage & ATA_HORKAGE_DISABLE) { ata_dev_info(dev, "unsupported device, disabling\n"); ata_dev_disable(dev); return 0; } if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) && dev->class == ATA_DEV_ATAPI) { ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n", atapi_enabled ? "not supported with this driver" : "disabled"); ata_dev_disable(dev); return 0; } rc = ata_do_link_spd_horkage(dev); if (rc) return rc; /* some WD SATA-1 drives have issues with LPM, turn on NOLPM for them */ if ((dev->horkage & ATA_HORKAGE_WD_BROKEN_LPM) && (id[ATA_ID_SATA_CAPABILITY] & 0xe) == 0x2) dev->horkage |= ATA_HORKAGE_NOLPM; if (ap->flags & ATA_FLAG_NO_LPM) dev->horkage |= ATA_HORKAGE_NOLPM; if (dev->horkage & ATA_HORKAGE_NOLPM) { ata_dev_warn(dev, "LPM support broken, forcing max_power\n"); dev->link->ap->target_lpm_policy = ATA_LPM_MAX_POWER; } /* let ACPI work its magic */ rc = ata_acpi_on_devcfg(dev); if (rc) return rc; /* massage HPA, do it early as it might change IDENTIFY data */ rc = ata_hpa_resize(dev); if (rc) return rc; /* print device capabilities */ if (ata_msg_probe(ap)) ata_dev_dbg(dev, "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " "85:%04x 86:%04x 87:%04x 88:%04x\n", __func__, id[49], id[82], id[83], id[84], id[85], id[86], id[87], id[88]); /* initialize to-be-configured parameters */ dev->flags &= ~ATA_DFLAG_CFG_MASK; dev->max_sectors = 0; dev->cdb_len = 0; dev->n_sectors = 0; dev->cylinders = 0; dev->heads = 0; dev->sectors = 0; dev->multi_count = 0; /* * common ATA, ATAPI feature tests */ /* find max transfer mode; for printk only */ xfer_mask = ata_id_xfermask(id); if (ata_msg_probe(ap)) ata_dump_id(id); /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, sizeof(fwrevbuf)); ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, sizeof(modelbuf)); /* ATA-specific feature tests */ if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { if (ata_id_is_cfa(id)) { /* CPRM may make this media unusable */ if (id[ATA_ID_CFA_KEY_MGMT] & 1) ata_dev_warn(dev, "supports DRM functions and may not be fully accessible\n"); snprintf(revbuf, 7, "CFA"); } else { snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); /* Warn the user if the device has TPM extensions */ if (ata_id_has_tpm(id)) ata_dev_warn(dev, "supports DRM functions and may not be fully accessible\n"); } dev->n_sectors = ata_id_n_sectors(id); /* get current R/W Multiple count setting */ if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) { unsigned int max = dev->id[47] & 0xff; unsigned int cnt = dev->id[59] & 0xff; /* only recognize/allow powers of two here */ if (is_power_of_2(max) && is_power_of_2(cnt)) if (cnt <= max) dev->multi_count = cnt; } if (ata_id_has_lba(id)) { const char *lba_desc; char ncq_desc[24]; lba_desc = "LBA"; dev->flags |= ATA_DFLAG_LBA; if (ata_id_has_lba48(id)) { dev->flags |= ATA_DFLAG_LBA48; lba_desc = "LBA48"; if (dev->n_sectors >= (1UL << 28) && ata_id_has_flush_ext(id)) dev->flags |= ATA_DFLAG_FLUSH_EXT; } /* config NCQ */ rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); if (rc) return rc; /* print device info to dmesg */ if (ata_msg_drv(ap) && print_info) { ata_dev_info(dev, "%s: %s, %s, max %s\n", revbuf, modelbuf, fwrevbuf, ata_mode_string(xfer_mask)); ata_dev_info(dev, "%llu sectors, multi %u: %s %s\n", (unsigned long long)dev->n_sectors, dev->multi_count, lba_desc, ncq_desc); } } else { /* CHS */ /* Default translation */ dev->cylinders = id[1]; dev->heads = id[3]; dev->sectors = id[6]; if (ata_id_current_chs_valid(id)) { /* Current CHS translation is valid. */ dev->cylinders = id[54]; dev->heads = id[55]; dev->sectors = id[56]; } /* print device info to dmesg */ if (ata_msg_drv(ap) && print_info) { ata_dev_info(dev, "%s: %s, %s, max %s\n", revbuf, modelbuf, fwrevbuf, ata_mode_string(xfer_mask)); ata_dev_info(dev, "%llu sectors, multi %u, CHS %u/%u/%u\n", (unsigned long long)dev->n_sectors, dev->multi_count, dev->cylinders, dev->heads, dev->sectors); } } /* Check and mark DevSlp capability. Get DevSlp timing variables * from SATA Settings page of Identify Device Data Log. */ if (ata_id_has_devslp(dev->id)) { u8 *sata_setting = ap->sector_buf; int i, j; dev->flags |= ATA_DFLAG_DEVSLP; err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, ATA_LOG_SATA_SETTINGS, sata_setting, 1); if (err_mask) ata_dev_dbg(dev, "failed to get Identify Device Data, Emask 0x%x\n", err_mask); else for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) { j = ATA_LOG_DEVSLP_OFFSET + i; dev->devslp_timing[i] = sata_setting[j]; } } ata_dev_config_sense_reporting(dev); ata_dev_config_zac(dev); ata_dev_config_trusted(dev); dev->cdb_len = 32; } /* ATAPI-specific feature tests */ else if (dev->class == ATA_DEV_ATAPI) { const char *cdb_intr_string = ""; const char *atapi_an_string = ""; const char *dma_dir_string = ""; u32 sntf; rc = atapi_cdb_len(id); if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { if (ata_msg_warn(ap)) ata_dev_warn(dev, "unsupported CDB len\n"); rc = -EINVAL; goto err_out_nosup; } dev->cdb_len = (unsigned int) rc; /* Enable ATAPI AN if both the host and device have * the support. If PMP is attached, SNTF is required * to enable ATAPI AN to discern between PHY status * changed notifications and ATAPI ANs. */ if (atapi_an && (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && (!sata_pmp_attached(ap) || sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { /* issue SET feature command to turn this on */ err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE, SATA_AN); if (err_mask) ata_dev_err(dev, "failed to enable ATAPI AN (err_mask=0x%x)\n", err_mask); else { dev->flags |= ATA_DFLAG_AN; atapi_an_string = ", ATAPI AN"; } } if (ata_id_cdb_intr(dev->id)) { dev->flags |= ATA_DFLAG_CDB_INTR; cdb_intr_string = ", CDB intr"; } if (atapi_dmadir || (dev->horkage & ATA_HORKAGE_ATAPI_DMADIR) || atapi_id_dmadir(dev->id)) { dev->flags |= ATA_DFLAG_DMADIR; dma_dir_string = ", DMADIR"; } if (ata_id_has_da(dev->id)) { dev->flags |= ATA_DFLAG_DA; zpodd_init(dev); } /* print device info to dmesg */ if (ata_msg_drv(ap) && print_info) ata_dev_info(dev, "ATAPI: %s, %s, max %s%s%s%s\n", modelbuf, fwrevbuf, ata_mode_string(xfer_mask), cdb_intr_string, atapi_an_string, dma_dir_string); } /* determine max_sectors */ dev->max_sectors = ATA_MAX_SECTORS; if (dev->flags & ATA_DFLAG_LBA48) dev->max_sectors = ATA_MAX_SECTORS_LBA48; /* Limit PATA drive on SATA cable bridge transfers to udma5, 200 sectors */ if (ata_dev_knobble(dev)) { if (ata_msg_drv(ap) && print_info) ata_dev_info(dev, "applying bridge limits\n"); dev->udma_mask &= ATA_UDMA5; dev->max_sectors = ATA_MAX_SECTORS; } if ((dev->class == ATA_DEV_ATAPI) && (atapi_command_packet_set(id) == TYPE_TAPE)) { dev->max_sectors = ATA_MAX_SECTORS_TAPE; dev->horkage |= ATA_HORKAGE_STUCK_ERR; } if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, dev->max_sectors); if (dev->horkage & ATA_HORKAGE_MAX_SEC_1024) dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_1024, dev->max_sectors); if (dev->horkage & ATA_HORKAGE_MAX_SEC_LBA48) dev->max_sectors = ATA_MAX_SECTORS_LBA48; if (ap->ops->dev_config) ap->ops->dev_config(dev); if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { /* Let the user know. We don't want to disallow opens for rescue purposes, or in case the vendor is just a blithering idiot. Do this after the dev_config call as some controllers with buggy firmware may want to avoid reporting false device bugs */ if (print_info) { ata_dev_warn(dev, "Drive reports diagnostics failure. This may indicate a drive\n"); ata_dev_warn(dev, "fault or invalid emulation. Contact drive vendor for information.\n"); } } if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) { ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n"); ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n"); } return 0; err_out_nosup: if (ata_msg_probe(ap)) ata_dev_dbg(dev, "%s: EXIT, err\n", __func__); return rc; } /** * ata_cable_40wire - return 40 wire cable type * @ap: port * * Helper method for drivers which want to hardwire 40 wire cable * detection. */ int ata_cable_40wire(struct ata_port *ap) { return ATA_CBL_PATA40; } EXPORT_SYMBOL_GPL(ata_cable_40wire); /** * ata_cable_80wire - return 80 wire cable type * @ap: port * * Helper method for drivers which want to hardwire 80 wire cable * detection. */ int ata_cable_80wire(struct ata_port *ap) { return ATA_CBL_PATA80; } EXPORT_SYMBOL_GPL(ata_cable_80wire); /** * ata_cable_unknown - return unknown PATA cable. * @ap: port * * Helper method for drivers which have no PATA cable detection. */ int ata_cable_unknown(struct ata_port *ap) { return ATA_CBL_PATA_UNK; } EXPORT_SYMBOL_GPL(ata_cable_unknown); /** * ata_cable_ignore - return ignored PATA cable. * @ap: port * * Helper method for drivers which don't use cable type to limit * transfer mode. */ int ata_cable_ignore(struct ata_port *ap) { return ATA_CBL_PATA_IGN; } EXPORT_SYMBOL_GPL(ata_cable_ignore); /** * ata_cable_sata - return SATA cable type * @ap: port * * Helper method for drivers which have SATA cables */ int ata_cable_sata(struct ata_port *ap) { return ATA_CBL_SATA; } EXPORT_SYMBOL_GPL(ata_cable_sata); /** * ata_bus_probe - Reset and probe ATA bus * @ap: Bus to probe * * Master ATA bus probing function. Initiates a hardware-dependent * bus reset, then attempts to identify any devices found on * the bus. * * LOCKING: * PCI/etc. bus probe sem. * * RETURNS: * Zero on success, negative errno otherwise. */ int ata_bus_probe(struct ata_port *ap) { unsigned int classes[ATA_MAX_DEVICES]; int tries[ATA_MAX_DEVICES]; int rc; struct ata_device *dev; ata_for_each_dev(dev, &ap->link, ALL) tries[dev->devno] = ATA_PROBE_MAX_TRIES; retry: ata_for_each_dev(dev, &ap->link, ALL) { /* If we issue an SRST then an ATA drive (not ATAPI) * may change configuration and be in PIO0 timing. If * we do a hard reset (or are coming from power on) * this is true for ATA or ATAPI. Until we've set a * suitable controller mode we should not touch the * bus as we may be talking too fast. */ dev->pio_mode = XFER_PIO_0; dev->dma_mode = 0xff; /* If the controller has a pio mode setup function * then use it to set the chipset to rights. Don't * touch the DMA setup as that will be dealt with when * configuring devices. */ if (ap->ops->set_piomode) ap->ops->set_piomode(ap, dev); } /* reset and determine device classes */ ap->ops->phy_reset(ap); ata_for_each_dev(dev, &ap->link, ALL) { if (dev->class != ATA_DEV_UNKNOWN) classes[dev->devno] = dev->class; else classes[dev->devno] = ATA_DEV_NONE; dev->class = ATA_DEV_UNKNOWN; } /* read IDENTIFY page and configure devices. We have to do the identify specific sequence bass-ackwards so that PDIAG- is released by the slave device */ ata_for_each_dev(dev, &ap->link, ALL_REVERSE) { if (tries[dev->devno]) dev->class = classes[dev->devno]; if (!ata_dev_enabled(dev)) continue; rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, dev->id); if (rc) goto fail; } /* Now ask for the cable type as PDIAG- should have been released */ if (ap->ops->cable_detect) ap->cbl = ap->ops->cable_detect(ap); /* We may have SATA bridge glue hiding here irrespective of * the reported cable types and sensed types. When SATA * drives indicate we have a bridge, we don't know which end * of the link the bridge is which is a problem. */ ata_for_each_dev(dev, &ap->link, ENABLED) if (ata_id_is_sata(dev->id)) ap->cbl = ATA_CBL_SATA; /* After the identify sequence we can now set up the devices. We do this in the normal order so that the user doesn't get confused */ ata_for_each_dev(dev, &ap->link, ENABLED) { ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO; rc = ata_dev_configure(dev); ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO; if (rc) goto fail; } /* configure transfer mode */ rc = ata_set_mode(&ap->link, &dev); if (rc) goto fail; ata_for_each_dev(dev, &ap->link, ENABLED) return 0; return -ENODEV; fail: tries[dev->devno]--; switch (rc) { case -EINVAL: /* eeek, something went very wrong, give up */ tries[dev->devno] = 0; break; case -ENODEV: /* give it just one more chance */ tries[dev->devno] = min(tries[dev->devno], 1); 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/x49wpy40ysk.fsf@segfault.boston.devel.redhat.com */ { "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, }, { "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_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_sas_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 }, { "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);
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