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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 *  libata-core.c - helper library for ATA4 *5 *  Copyright 2003-2004 Red Hat, Inc.  All rights reserved.6 *  Copyright 2003-2004 Jeff Garzik7 *8 *  libata documentation is available via 'make {ps|pdf}docs',9 *  as Documentation/driver-api/libata.rst10 *11 *  Hardware documentation available from http://www.t13.org/ and12 *  http://www.sata-io.org/13 *14 *  Standards documents from:15 *	http://www.t13.org (ATA standards, PCI DMA IDE spec)16 *	http://www.t10.org (SCSI MMC - for ATAPI MMC)17 *	http://www.sata-io.org (SATA)18 *	http://www.compactflash.org (CF)19 *	http://www.qic.org (QIC157 - Tape and DSC)20 *	http://www.ce-ata.org (CE-ATA: not supported)21 *22 * libata is essentially a library of internal helper functions for23 * low-level ATA host controller drivers.  As such, the API/ABI is24 * likely to change as new drivers are added and updated.25 * Do not depend on ABI/API stability.26 */27 28#include <linux/kernel.h>29#include <linux/module.h>30#include <linux/pci.h>31#include <linux/init.h>32#include <linux/list.h>33#include <linux/mm.h>34#include <linux/spinlock.h>35#include <linux/blkdev.h>36#include <linux/delay.h>37#include <linux/timer.h>38#include <linux/time.h>39#include <linux/interrupt.h>40#include <linux/completion.h>41#include <linux/suspend.h>42#include <linux/workqueue.h>43#include <linux/scatterlist.h>44#include <linux/io.h>45#include <linux/log2.h>46#include <linux/slab.h>47#include <linux/glob.h>48#include <scsi/scsi.h>49#include <scsi/scsi_cmnd.h>50#include <scsi/scsi_host.h>51#include <linux/libata.h>52#include <asm/byteorder.h>53#include <linux/unaligned.h>54#include <linux/cdrom.h>55#include <linux/ratelimit.h>56#include <linux/leds.h>57#include <linux/pm_runtime.h>58#include <linux/platform_device.h>59#include <asm/setup.h>60 61#define CREATE_TRACE_POINTS62#include <trace/events/libata.h>63 64#include "libata.h"65#include "libata-transport.h"66 67const struct ata_port_operations ata_base_port_ops = {68	.prereset		= ata_std_prereset,69	.postreset		= ata_std_postreset,70	.error_handler		= ata_std_error_handler,71	.sched_eh		= ata_std_sched_eh,72	.end_eh			= ata_std_end_eh,73};74 75static unsigned int ata_dev_init_params(struct ata_device *dev,76					u16 heads, u16 sectors);77static unsigned int ata_dev_set_xfermode(struct ata_device *dev);78static void ata_dev_xfermask(struct ata_device *dev);79static unsigned int ata_dev_quirks(const struct ata_device *dev);80 81static DEFINE_IDA(ata_ida);82 83#ifdef CONFIG_ATA_FORCE84struct ata_force_param {85	const char	*name;86	u8		cbl;87	u8		spd_limit;88	unsigned int	xfer_mask;89	unsigned int	quirk_on;90	unsigned int	quirk_off;91	u16		lflags_on;92	u16		lflags_off;93};94 95struct ata_force_ent {96	int			port;97	int			device;98	struct ata_force_param	param;99};100 101static struct ata_force_ent *ata_force_tbl;102static int ata_force_tbl_size;103 104static char ata_force_param_buf[COMMAND_LINE_SIZE] __initdata;105/* param_buf is thrown away after initialization, disallow read */106module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);107MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/admin-guide/kernel-parameters.rst for details)");108#endif109 110static int atapi_enabled = 1;111module_param(atapi_enabled, int, 0444);112MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])");113 114static int atapi_dmadir = 0;115module_param(atapi_dmadir, int, 0444);116MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)");117 118int atapi_passthru16 = 1;119module_param(atapi_passthru16, int, 0444);120MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])");121 122int libata_fua = 0;123module_param_named(fua, libata_fua, int, 0444);124MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)");125 126static int ata_ignore_hpa;127module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);128MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");129 130static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;131module_param_named(dma, libata_dma_mask, int, 0444);132MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");133 134static int ata_probe_timeout;135module_param(ata_probe_timeout, int, 0444);136MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");137 138int libata_noacpi = 0;139module_param_named(noacpi, libata_noacpi, int, 0444);140MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)");141 142int libata_allow_tpm = 0;143module_param_named(allow_tpm, libata_allow_tpm, int, 0444);144MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)");145 146static int atapi_an;147module_param(atapi_an, int, 0444);148MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)");149 150MODULE_AUTHOR("Jeff Garzik");151MODULE_DESCRIPTION("Library module for ATA devices");152MODULE_LICENSE("GPL");153MODULE_VERSION(DRV_VERSION);154 155static inline bool ata_dev_print_info(const struct ata_device *dev)156{157	struct ata_eh_context *ehc = &dev->link->eh_context;158 159	return ehc->i.flags & ATA_EHI_PRINTINFO;160}161 162/**163 *	ata_link_next - link iteration helper164 *	@link: the previous link, NULL to start165 *	@ap: ATA port containing links to iterate166 *	@mode: iteration mode, one of ATA_LITER_*167 *168 *	LOCKING:169 *	Host lock or EH context.170 *171 *	RETURNS:172 *	Pointer to the next link.173 */174struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,175			       enum ata_link_iter_mode mode)176{177	BUG_ON(mode != ATA_LITER_EDGE &&178	       mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST);179 180	/* NULL link indicates start of iteration */181	if (!link)182		switch (mode) {183		case ATA_LITER_EDGE:184		case ATA_LITER_PMP_FIRST:185			if (sata_pmp_attached(ap))186				return ap->pmp_link;187			fallthrough;188		case ATA_LITER_HOST_FIRST:189			return &ap->link;190		}191 192	/* we just iterated over the host link, what's next? */193	if (link == &ap->link)194		switch (mode) {195		case ATA_LITER_HOST_FIRST:196			if (sata_pmp_attached(ap))197				return ap->pmp_link;198			fallthrough;199		case ATA_LITER_PMP_FIRST:200			if (unlikely(ap->slave_link))201				return ap->slave_link;202			fallthrough;203		case ATA_LITER_EDGE:204			return NULL;205		}206 207	/* slave_link excludes PMP */208	if (unlikely(link == ap->slave_link))209		return NULL;210 211	/* we were over a PMP link */212	if (++link < ap->pmp_link + ap->nr_pmp_links)213		return link;214 215	if (mode == ATA_LITER_PMP_FIRST)216		return &ap->link;217 218	return NULL;219}220EXPORT_SYMBOL_GPL(ata_link_next);221 222/**223 *	ata_dev_next - device iteration helper224 *	@dev: the previous device, NULL to start225 *	@link: ATA link containing devices to iterate226 *	@mode: iteration mode, one of ATA_DITER_*227 *228 *	LOCKING:229 *	Host lock or EH context.230 *231 *	RETURNS:232 *	Pointer to the next device.233 */234struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link,235				enum ata_dev_iter_mode mode)236{237	BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE &&238	       mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE);239 240	/* NULL dev indicates start of iteration */241	if (!dev)242		switch (mode) {243		case ATA_DITER_ENABLED:244		case ATA_DITER_ALL:245			dev = link->device;246			goto check;247		case ATA_DITER_ENABLED_REVERSE:248		case ATA_DITER_ALL_REVERSE:249			dev = link->device + ata_link_max_devices(link) - 1;250			goto check;251		}252 253 next:254	/* move to the next one */255	switch (mode) {256	case ATA_DITER_ENABLED:257	case ATA_DITER_ALL:258		if (++dev < link->device + ata_link_max_devices(link))259			goto check;260		return NULL;261	case ATA_DITER_ENABLED_REVERSE:262	case ATA_DITER_ALL_REVERSE:263		if (--dev >= link->device)264			goto check;265		return NULL;266	}267 268 check:269	if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) &&270	    !ata_dev_enabled(dev))271		goto next;272	return dev;273}274EXPORT_SYMBOL_GPL(ata_dev_next);275 276/**277 *	ata_dev_phys_link - find physical link for a device278 *	@dev: ATA device to look up physical link for279 *280 *	Look up physical link which @dev is attached to.  Note that281 *	this is different from @dev->link only when @dev is on slave282 *	link.  For all other cases, it's the same as @dev->link.283 *284 *	LOCKING:285 *	Don't care.286 *287 *	RETURNS:288 *	Pointer to the found physical link.289 */290struct ata_link *ata_dev_phys_link(struct ata_device *dev)291{292	struct ata_port *ap = dev->link->ap;293 294	if (!ap->slave_link)295		return dev->link;296	if (!dev->devno)297		return &ap->link;298	return ap->slave_link;299}300 301#ifdef CONFIG_ATA_FORCE302/**303 *	ata_force_cbl - force cable type according to libata.force304 *	@ap: ATA port of interest305 *306 *	Force cable type according to libata.force and whine about it.307 *	The last entry which has matching port number is used, so it308 *	can be specified as part of device force parameters.  For309 *	example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the310 *	same effect.311 *312 *	LOCKING:313 *	EH context.314 */315void ata_force_cbl(struct ata_port *ap)316{317	int i;318 319	for (i = ata_force_tbl_size - 1; i >= 0; i--) {320		const struct ata_force_ent *fe = &ata_force_tbl[i];321 322		if (fe->port != -1 && fe->port != ap->print_id)323			continue;324 325		if (fe->param.cbl == ATA_CBL_NONE)326			continue;327 328		ap->cbl = fe->param.cbl;329		ata_port_notice(ap, "FORCE: cable set to %s\n", fe->param.name);330		return;331	}332}333 334/**335 *	ata_force_link_limits - force link limits according to libata.force336 *	@link: ATA link of interest337 *338 *	Force link flags and SATA spd limit according to libata.force339 *	and whine about it.  When only the port part is specified340 *	(e.g. 1:), the limit applies to all links connected to both341 *	the host link and all fan-out ports connected via PMP.  If the342 *	device part is specified as 0 (e.g. 1.00:), it specifies the343 *	first fan-out link not the host link.  Device number 15 always344 *	points to the host link whether PMP is attached or not.  If the345 *	controller has slave link, device number 16 points to it.346 *347 *	LOCKING:348 *	EH context.349 */350static void ata_force_link_limits(struct ata_link *link)351{352	bool did_spd = false;353	int linkno = link->pmp;354	int i;355 356	if (ata_is_host_link(link))357		linkno += 15;358 359	for (i = ata_force_tbl_size - 1; i >= 0; i--) {360		const struct ata_force_ent *fe = &ata_force_tbl[i];361 362		if (fe->port != -1 && fe->port != link->ap->print_id)363			continue;364 365		if (fe->device != -1 && fe->device != linkno)366			continue;367 368		/* only honor the first spd limit */369		if (!did_spd && fe->param.spd_limit) {370			link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;371			ata_link_notice(link, "FORCE: PHY spd limit set to %s\n",372					fe->param.name);373			did_spd = true;374		}375 376		/* let lflags stack */377		if (fe->param.lflags_on) {378			link->flags |= fe->param.lflags_on;379			ata_link_notice(link,380					"FORCE: link flag 0x%x forced -> 0x%x\n",381					fe->param.lflags_on, link->flags);382		}383		if (fe->param.lflags_off) {384			link->flags &= ~fe->param.lflags_off;385			ata_link_notice(link,386				"FORCE: link flag 0x%x cleared -> 0x%x\n",387				fe->param.lflags_off, link->flags);388		}389	}390}391 392/**393 *	ata_force_xfermask - force xfermask according to libata.force394 *	@dev: ATA device of interest395 *396 *	Force xfer_mask according to libata.force and whine about it.397 *	For consistency with link selection, device number 15 selects398 *	the first device connected to the host link.399 *400 *	LOCKING:401 *	EH context.402 */403static void ata_force_xfermask(struct ata_device *dev)404{405	int devno = dev->link->pmp + dev->devno;406	int alt_devno = devno;407	int i;408 409	/* allow n.15/16 for devices attached to host port */410	if (ata_is_host_link(dev->link))411		alt_devno += 15;412 413	for (i = ata_force_tbl_size - 1; i >= 0; i--) {414		const struct ata_force_ent *fe = &ata_force_tbl[i];415		unsigned int pio_mask, mwdma_mask, udma_mask;416 417		if (fe->port != -1 && fe->port != dev->link->ap->print_id)418			continue;419 420		if (fe->device != -1 && fe->device != devno &&421		    fe->device != alt_devno)422			continue;423 424		if (!fe->param.xfer_mask)425			continue;426 427		ata_unpack_xfermask(fe->param.xfer_mask,428				    &pio_mask, &mwdma_mask, &udma_mask);429		if (udma_mask)430			dev->udma_mask = udma_mask;431		else if (mwdma_mask) {432			dev->udma_mask = 0;433			dev->mwdma_mask = mwdma_mask;434		} else {435			dev->udma_mask = 0;436			dev->mwdma_mask = 0;437			dev->pio_mask = pio_mask;438		}439 440		ata_dev_notice(dev, "FORCE: xfer_mask set to %s\n",441			       fe->param.name);442		return;443	}444}445 446/**447 *	ata_force_quirks - force quirks according to libata.force448 *	@dev: ATA device of interest449 *450 *	Force quirks according to libata.force and whine about it.451 *	For consistency with link selection, device number 15 selects452 *	the first device connected to the host link.453 *454 *	LOCKING:455 *	EH context.456 */457static void ata_force_quirks(struct ata_device *dev)458{459	int devno = dev->link->pmp + dev->devno;460	int alt_devno = devno;461	int i;462 463	/* allow n.15/16 for devices attached to host port */464	if (ata_is_host_link(dev->link))465		alt_devno += 15;466 467	for (i = 0; i < ata_force_tbl_size; i++) {468		const struct ata_force_ent *fe = &ata_force_tbl[i];469 470		if (fe->port != -1 && fe->port != dev->link->ap->print_id)471			continue;472 473		if (fe->device != -1 && fe->device != devno &&474		    fe->device != alt_devno)475			continue;476 477		if (!(~dev->quirks & fe->param.quirk_on) &&478		    !(dev->quirks & fe->param.quirk_off))479			continue;480 481		dev->quirks |= fe->param.quirk_on;482		dev->quirks &= ~fe->param.quirk_off;483 484		ata_dev_notice(dev, "FORCE: modified (%s)\n",485			       fe->param.name);486	}487}488#else489static inline void ata_force_link_limits(struct ata_link *link) { }490static inline void ata_force_xfermask(struct ata_device *dev) { }491static inline void ata_force_quirks(struct ata_device *dev) { }492#endif493 494/**495 *	atapi_cmd_type - Determine ATAPI command type from SCSI opcode496 *	@opcode: SCSI opcode497 *498 *	Determine ATAPI command type from @opcode.499 *500 *	LOCKING:501 *	None.502 *503 *	RETURNS:504 *	ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}505 */506int atapi_cmd_type(u8 opcode)507{508	switch (opcode) {509	case GPCMD_READ_10:510	case GPCMD_READ_12:511		return ATAPI_READ;512 513	case GPCMD_WRITE_10:514	case GPCMD_WRITE_12:515	case GPCMD_WRITE_AND_VERIFY_10:516		return ATAPI_WRITE;517 518	case GPCMD_READ_CD:519	case GPCMD_READ_CD_MSF:520		return ATAPI_READ_CD;521 522	case ATA_16:523	case ATA_12:524		if (atapi_passthru16)525			return ATAPI_PASS_THRU;526		fallthrough;527	default:528		return ATAPI_MISC;529	}530}531EXPORT_SYMBOL_GPL(atapi_cmd_type);532 533static const u8 ata_rw_cmds[] = {534	/* pio multi */535	ATA_CMD_READ_MULTI,536	ATA_CMD_WRITE_MULTI,537	ATA_CMD_READ_MULTI_EXT,538	ATA_CMD_WRITE_MULTI_EXT,539	0,540	0,541	0,542	0,543	/* pio */544	ATA_CMD_PIO_READ,545	ATA_CMD_PIO_WRITE,546	ATA_CMD_PIO_READ_EXT,547	ATA_CMD_PIO_WRITE_EXT,548	0,549	0,550	0,551	0,552	/* dma */553	ATA_CMD_READ,554	ATA_CMD_WRITE,555	ATA_CMD_READ_EXT,556	ATA_CMD_WRITE_EXT,557	0,558	0,559	0,560	ATA_CMD_WRITE_FUA_EXT561};562 563/**564 *	ata_set_rwcmd_protocol - set taskfile r/w command and protocol565 *	@dev: target device for the taskfile566 *	@tf: taskfile to examine and configure567 *568 *	Examine the device configuration and tf->flags to determine569 *	the proper read/write command and protocol to use for @tf.570 *571 *	LOCKING:572 *	caller.573 */574static bool ata_set_rwcmd_protocol(struct ata_device *dev,575				   struct ata_taskfile *tf)576{577	u8 cmd;578 579	int index, fua, lba48, write;580 581	fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;582	lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;583	write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;584 585	if (dev->flags & ATA_DFLAG_PIO) {586		tf->protocol = ATA_PROT_PIO;587		index = dev->multi_count ? 0 : 8;588	} else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {589		/* Unable to use DMA due to host limitation */590		tf->protocol = ATA_PROT_PIO;591		index = dev->multi_count ? 0 : 8;592	} else {593		tf->protocol = ATA_PROT_DMA;594		index = 16;595	}596 597	cmd = ata_rw_cmds[index + fua + lba48 + write];598	if (!cmd)599		return false;600 601	tf->command = cmd;602 603	return true;604}605 606/**607 *	ata_tf_read_block - Read block address from ATA taskfile608 *	@tf: ATA taskfile of interest609 *	@dev: ATA device @tf belongs to610 *611 *	LOCKING:612 *	None.613 *614 *	Read block address from @tf.  This function can handle all615 *	three address formats - LBA, LBA48 and CHS.  tf->protocol and616 *	flags select the address format to use.617 *618 *	RETURNS:619 *	Block address read from @tf.620 */621u64 ata_tf_read_block(const struct ata_taskfile *tf, struct ata_device *dev)622{623	u64 block = 0;624 625	if (tf->flags & ATA_TFLAG_LBA) {626		if (tf->flags & ATA_TFLAG_LBA48) {627			block |= (u64)tf->hob_lbah << 40;628			block |= (u64)tf->hob_lbam << 32;629			block |= (u64)tf->hob_lbal << 24;630		} else631			block |= (tf->device & 0xf) << 24;632 633		block |= tf->lbah << 16;634		block |= tf->lbam << 8;635		block |= tf->lbal;636	} else {637		u32 cyl, head, sect;638 639		cyl = tf->lbam | (tf->lbah << 8);640		head = tf->device & 0xf;641		sect = tf->lbal;642 643		if (!sect) {644			ata_dev_warn(dev,645				     "device reported invalid CHS sector 0\n");646			return U64_MAX;647		}648 649		block = (cyl * dev->heads + head) * dev->sectors + sect - 1;650	}651 652	return block;653}654 655/*656 * Set a taskfile command duration limit index.657 */658static inline void ata_set_tf_cdl(struct ata_queued_cmd *qc, int cdl)659{660	struct ata_taskfile *tf = &qc->tf;661 662	if (tf->protocol == ATA_PROT_NCQ)663		tf->auxiliary |= cdl;664	else665		tf->feature |= cdl;666 667	/*668	 * Mark this command as having a CDL and request the result669	 * task file so that we can inspect the sense data available670	 * bit on completion.671	 */672	qc->flags |= ATA_QCFLAG_HAS_CDL | ATA_QCFLAG_RESULT_TF;673}674 675/**676 *	ata_build_rw_tf - Build ATA taskfile for given read/write request677 *	@qc: Metadata associated with the taskfile to build678 *	@block: Block address679 *	@n_block: Number of blocks680 *	@tf_flags: RW/FUA etc...681 *	@cdl: Command duration limit index682 *	@class: IO priority class683 *684 *	LOCKING:685 *	None.686 *687 *	Build ATA taskfile for the command @qc for read/write request described688 *	by @block, @n_block, @tf_flags and @class.689 *690 *	RETURNS:691 *692 *	0 on success, -ERANGE if the request is too large for @dev,693 *	-EINVAL if the request is invalid.694 */695int ata_build_rw_tf(struct ata_queued_cmd *qc, u64 block, u32 n_block,696		    unsigned int tf_flags, int cdl, int class)697{698	struct ata_taskfile *tf = &qc->tf;699	struct ata_device *dev = qc->dev;700 701	tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;702	tf->flags |= tf_flags;703 704	if (ata_ncq_enabled(dev)) {705		/* yay, NCQ */706		if (!lba_48_ok(block, n_block))707			return -ERANGE;708 709		tf->protocol = ATA_PROT_NCQ;710		tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;711 712		if (tf->flags & ATA_TFLAG_WRITE)713			tf->command = ATA_CMD_FPDMA_WRITE;714		else715			tf->command = ATA_CMD_FPDMA_READ;716 717		tf->nsect = qc->hw_tag << 3;718		tf->hob_feature = (n_block >> 8) & 0xff;719		tf->feature = n_block & 0xff;720 721		tf->hob_lbah = (block >> 40) & 0xff;722		tf->hob_lbam = (block >> 32) & 0xff;723		tf->hob_lbal = (block >> 24) & 0xff;724		tf->lbah = (block >> 16) & 0xff;725		tf->lbam = (block >> 8) & 0xff;726		tf->lbal = block & 0xff;727 728		tf->device = ATA_LBA;729		if (tf->flags & ATA_TFLAG_FUA)730			tf->device |= 1 << 7;731 732		if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED &&733		    class == IOPRIO_CLASS_RT)734			tf->hob_nsect |= ATA_PRIO_HIGH << ATA_SHIFT_PRIO;735 736		if ((dev->flags & ATA_DFLAG_CDL_ENABLED) && cdl)737			ata_set_tf_cdl(qc, cdl);738 739	} else if (dev->flags & ATA_DFLAG_LBA) {740		tf->flags |= ATA_TFLAG_LBA;741 742		if ((dev->flags & ATA_DFLAG_CDL_ENABLED) && cdl)743			ata_set_tf_cdl(qc, cdl);744 745		/* Both FUA writes and a CDL index require 48-bit commands */746		if (!(tf->flags & ATA_TFLAG_FUA) &&747		    !(qc->flags & ATA_QCFLAG_HAS_CDL) &&748		    lba_28_ok(block, n_block)) {749			/* use LBA28 */750			tf->device |= (block >> 24) & 0xf;751		} else if (lba_48_ok(block, n_block)) {752			if (!(dev->flags & ATA_DFLAG_LBA48))753				return -ERANGE;754 755			/* use LBA48 */756			tf->flags |= ATA_TFLAG_LBA48;757 758			tf->hob_nsect = (n_block >> 8) & 0xff;759 760			tf->hob_lbah = (block >> 40) & 0xff;761			tf->hob_lbam = (block >> 32) & 0xff;762			tf->hob_lbal = (block >> 24) & 0xff;763		} else {764			/* request too large even for LBA48 */765			return -ERANGE;766		}767 768		if (unlikely(!ata_set_rwcmd_protocol(dev, tf)))769			return -EINVAL;770 771		tf->nsect = n_block & 0xff;772 773		tf->lbah = (block >> 16) & 0xff;774		tf->lbam = (block >> 8) & 0xff;775		tf->lbal = block & 0xff;776 777		tf->device |= ATA_LBA;778	} else {779		/* CHS */780		u32 sect, head, cyl, track;781 782		/* The request -may- be too large for CHS addressing. */783		if (!lba_28_ok(block, n_block))784			return -ERANGE;785 786		if (unlikely(!ata_set_rwcmd_protocol(dev, tf)))787			return -EINVAL;788 789		/* Convert LBA to CHS */790		track = (u32)block / dev->sectors;791		cyl   = track / dev->heads;792		head  = track % dev->heads;793		sect  = (u32)block % dev->sectors + 1;794 795		/* Check whether the converted CHS can fit.796		   Cylinder: 0-65535797		   Head: 0-15798		   Sector: 1-255*/799		if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))800			return -ERANGE;801 802		tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */803		tf->lbal = sect;804		tf->lbam = cyl;805		tf->lbah = cyl >> 8;806		tf->device |= head;807	}808 809	return 0;810}811 812/**813 *	ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask814 *	@pio_mask: pio_mask815 *	@mwdma_mask: mwdma_mask816 *	@udma_mask: udma_mask817 *818 *	Pack @pio_mask, @mwdma_mask and @udma_mask into a single819 *	unsigned int xfer_mask.820 *821 *	LOCKING:822 *	None.823 *824 *	RETURNS:825 *	Packed xfer_mask.826 */827unsigned int ata_pack_xfermask(unsigned int pio_mask,828			       unsigned int mwdma_mask,829			       unsigned int udma_mask)830{831	return	((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |832		((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |833		((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);834}835EXPORT_SYMBOL_GPL(ata_pack_xfermask);836 837/**838 *	ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks839 *	@xfer_mask: xfer_mask to unpack840 *	@pio_mask: resulting pio_mask841 *	@mwdma_mask: resulting mwdma_mask842 *	@udma_mask: resulting udma_mask843 *844 *	Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.845 *	Any NULL destination masks will be ignored.846 */847void ata_unpack_xfermask(unsigned int xfer_mask, unsigned int *pio_mask,848			 unsigned int *mwdma_mask, unsigned int *udma_mask)849{850	if (pio_mask)851		*pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;852	if (mwdma_mask)853		*mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;854	if (udma_mask)855		*udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;856}857 858static const struct ata_xfer_ent {859	int shift, bits;860	u8 base;861} ata_xfer_tbl[] = {862	{ ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },863	{ ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },864	{ ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },865	{ -1, },866};867 868/**869 *	ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask870 *	@xfer_mask: xfer_mask of interest871 *872 *	Return matching XFER_* value for @xfer_mask.  Only the highest873 *	bit of @xfer_mask is considered.874 *875 *	LOCKING:876 *	None.877 *878 *	RETURNS:879 *	Matching XFER_* value, 0xff if no match found.880 */881u8 ata_xfer_mask2mode(unsigned int xfer_mask)882{883	int highbit = fls(xfer_mask) - 1;884	const struct ata_xfer_ent *ent;885 886	for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)887		if (highbit >= ent->shift && highbit < ent->shift + ent->bits)888			return ent->base + highbit - ent->shift;889	return 0xff;890}891EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);892 893/**894 *	ata_xfer_mode2mask - Find matching xfer_mask for XFER_*895 *	@xfer_mode: XFER_* of interest896 *897 *	Return matching xfer_mask for @xfer_mode.898 *899 *	LOCKING:900 *	None.901 *902 *	RETURNS:903 *	Matching xfer_mask, 0 if no match found.904 */905unsigned int ata_xfer_mode2mask(u8 xfer_mode)906{907	const struct ata_xfer_ent *ent;908 909	for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)910		if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)911			return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)912				& ~((1 << ent->shift) - 1);913	return 0;914}915EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);916 917/**918 *	ata_xfer_mode2shift - Find matching xfer_shift for XFER_*919 *	@xfer_mode: XFER_* of interest920 *921 *	Return matching xfer_shift for @xfer_mode.922 *923 *	LOCKING:924 *	None.925 *926 *	RETURNS:927 *	Matching xfer_shift, -1 if no match found.928 */929int ata_xfer_mode2shift(u8 xfer_mode)930{931	const struct ata_xfer_ent *ent;932 933	for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)934		if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)935			return ent->shift;936	return -1;937}938EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);939 940/**941 *	ata_mode_string - convert xfer_mask to string942 *	@xfer_mask: mask of bits supported; only highest bit counts.943 *944 *	Determine string which represents the highest speed945 *	(highest bit in @modemask).946 *947 *	LOCKING:948 *	None.949 *950 *	RETURNS:951 *	Constant C string representing highest speed listed in952 *	@mode_mask, or the constant C string "<n/a>".953 */954const char *ata_mode_string(unsigned int xfer_mask)955{956	static const char * const xfer_mode_str[] = {957		"PIO0",958		"PIO1",959		"PIO2",960		"PIO3",961		"PIO4",962		"PIO5",963		"PIO6",964		"MWDMA0",965		"MWDMA1",966		"MWDMA2",967		"MWDMA3",968		"MWDMA4",969		"UDMA/16",970		"UDMA/25",971		"UDMA/33",972		"UDMA/44",973		"UDMA/66",974		"UDMA/100",975		"UDMA/133",976		"UDMA7",977	};978	int highbit;979 980	highbit = fls(xfer_mask) - 1;981	if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))982		return xfer_mode_str[highbit];983	return "<n/a>";984}985EXPORT_SYMBOL_GPL(ata_mode_string);986 987const char *sata_spd_string(unsigned int spd)988{989	static const char * const spd_str[] = {990		"1.5 Gbps",991		"3.0 Gbps",992		"6.0 Gbps",993	};994 995	if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))996		return "<unknown>";997	return spd_str[spd - 1];998}999 1000/**1001 *	ata_dev_classify - determine device type based on ATA-spec signature1002 *	@tf: ATA taskfile register set for device to be identified1003 *1004 *	Determine from taskfile register contents whether a device is1005 *	ATA or ATAPI, as per "Signature and persistence" section1006 *	of ATA/PI spec (volume 1, sect 5.14).1007 *1008 *	LOCKING:1009 *	None.1010 *1011 *	RETURNS:1012 *	Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP,1013 *	%ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure.1014 */1015unsigned int ata_dev_classify(const struct ata_taskfile *tf)1016{1017	/* Apple's open source Darwin code hints that some devices only1018	 * put a proper signature into the LBA mid/high registers,1019	 * So, we only check those.  It's sufficient for uniqueness.1020	 *1021	 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate1022	 * signatures for ATA and ATAPI devices attached on SerialATA,1023	 * 0x3c/0xc3 and 0x69/0x96 respectively.  However, SerialATA1024	 * spec has never mentioned about using different signatures1025	 * for ATA/ATAPI devices.  Then, Serial ATA II: Port1026	 * Multiplier specification began to use 0x69/0x96 to identify1027	 * port multpliers and 0x3c/0xc3 to identify SEMB device.1028	 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and1029	 * 0x69/0x96 shortly and described them as reserved for1030	 * SerialATA.1031	 *1032	 * We follow the current spec and consider that 0x69/0x961033	 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.1034	 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports1035	 * SEMB signature.  This is worked around in1036	 * ata_dev_read_id().1037	 */1038	if (tf->lbam == 0 && tf->lbah == 0)1039		return ATA_DEV_ATA;1040 1041	if (tf->lbam == 0x14 && tf->lbah == 0xeb)1042		return ATA_DEV_ATAPI;1043 1044	if (tf->lbam == 0x69 && tf->lbah == 0x96)1045		return ATA_DEV_PMP;1046 1047	if (tf->lbam == 0x3c && tf->lbah == 0xc3)1048		return ATA_DEV_SEMB;1049 1050	if (tf->lbam == 0xcd && tf->lbah == 0xab)1051		return ATA_DEV_ZAC;1052 1053	return ATA_DEV_UNKNOWN;1054}1055EXPORT_SYMBOL_GPL(ata_dev_classify);1056 1057/**1058 *	ata_id_string - Convert IDENTIFY DEVICE page into string1059 *	@id: IDENTIFY DEVICE results we will examine1060 *	@s: string into which data is output1061 *	@ofs: offset into identify device page1062 *	@len: length of string to return. must be an even number.1063 *1064 *	The strings in the IDENTIFY DEVICE page are broken up into1065 *	16-bit chunks.  Run through the string, and output each1066 *	8-bit chunk linearly, regardless of platform.1067 *1068 *	LOCKING:1069 *	caller.1070 */1071 1072void ata_id_string(const u16 *id, unsigned char *s,1073		   unsigned int ofs, unsigned int len)1074{1075	unsigned int c;1076 1077	BUG_ON(len & 1);1078 1079	while (len > 0) {1080		c = id[ofs] >> 8;1081		*s = c;1082		s++;1083 1084		c = id[ofs] & 0xff;1085		*s = c;1086		s++;1087 1088		ofs++;1089		len -= 2;1090	}1091}1092EXPORT_SYMBOL_GPL(ata_id_string);1093 1094/**1095 *	ata_id_c_string - Convert IDENTIFY DEVICE page into C string1096 *	@id: IDENTIFY DEVICE results we will examine1097 *	@s: string into which data is output1098 *	@ofs: offset into identify device page1099 *	@len: length of string to return. must be an odd number.1100 *1101 *	This function is identical to ata_id_string except that it1102 *	trims trailing spaces and terminates the resulting string with1103 *	null.  @len must be actual maximum length (even number) + 1.1104 *1105 *	LOCKING:1106 *	caller.1107 */1108void ata_id_c_string(const u16 *id, unsigned char *s,1109		     unsigned int ofs, unsigned int len)1110{1111	unsigned char *p;1112 1113	ata_id_string(id, s, ofs, len - 1);1114 1115	p = s + strnlen(s, len - 1);1116	while (p > s && p[-1] == ' ')1117		p--;1118	*p = '\0';1119}1120EXPORT_SYMBOL_GPL(ata_id_c_string);1121 1122static u64 ata_id_n_sectors(const u16 *id)1123{1124	if (ata_id_has_lba(id)) {1125		if (ata_id_has_lba48(id))1126			return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);1127 1128		return ata_id_u32(id, ATA_ID_LBA_CAPACITY);1129	}1130 1131	if (ata_id_current_chs_valid(id))1132		return (u32)id[ATA_ID_CUR_CYLS] * (u32)id[ATA_ID_CUR_HEADS] *1133		       (u32)id[ATA_ID_CUR_SECTORS];1134 1135	return (u32)id[ATA_ID_CYLS] * (u32)id[ATA_ID_HEADS] *1136	       (u32)id[ATA_ID_SECTORS];1137}1138 1139u64 ata_tf_to_lba48(const struct ata_taskfile *tf)1140{1141	u64 sectors = 0;1142 1143	sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;1144	sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;1145	sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;1146	sectors |= (tf->lbah & 0xff) << 16;1147	sectors |= (tf->lbam & 0xff) << 8;1148	sectors |= (tf->lbal & 0xff);1149 1150	return sectors;1151}1152 1153u64 ata_tf_to_lba(const struct ata_taskfile *tf)1154{1155	u64 sectors = 0;1156 1157	sectors |= (tf->device & 0x0f) << 24;1158	sectors |= (tf->lbah & 0xff) << 16;1159	sectors |= (tf->lbam & 0xff) << 8;1160	sectors |= (tf->lbal & 0xff);1161 1162	return sectors;1163}1164 1165/**1166 *	ata_read_native_max_address - Read native max address1167 *	@dev: target device1168 *	@max_sectors: out parameter for the result native max address1169 *1170 *	Perform an LBA48 or LBA28 native size query upon the device in1171 *	question.1172 *1173 *	RETURNS:1174 *	0 on success, -EACCES if command is aborted by the drive.1175 *	-EIO on other errors.1176 */1177static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)1178{1179	unsigned int err_mask;1180	struct ata_taskfile tf;1181	int lba48 = ata_id_has_lba48(dev->id);1182 1183	ata_tf_init(dev, &tf);1184 1185	/* always clear all address registers */1186	tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;1187 1188	if (lba48) {1189		tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;1190		tf.flags |= ATA_TFLAG_LBA48;1191	} else1192		tf.command = ATA_CMD_READ_NATIVE_MAX;1193 1194	tf.protocol = ATA_PROT_NODATA;1195	tf.device |= ATA_LBA;1196 1197	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);1198	if (err_mask) {1199		ata_dev_warn(dev,1200			     "failed to read native max address (err_mask=0x%x)\n",1201			     err_mask);1202		if (err_mask == AC_ERR_DEV && (tf.error & ATA_ABORTED))1203			return -EACCES;1204		return -EIO;1205	}1206 1207	if (lba48)1208		*max_sectors = ata_tf_to_lba48(&tf) + 1;1209	else1210		*max_sectors = ata_tf_to_lba(&tf) + 1;1211	if (dev->quirks & ATA_QUIRK_HPA_SIZE)1212		(*max_sectors)--;1213	return 0;1214}1215 1216/**1217 *	ata_set_max_sectors - Set max sectors1218 *	@dev: target device1219 *	@new_sectors: new max sectors value to set for the device1220 *1221 *	Set max sectors of @dev to @new_sectors.1222 *1223 *	RETURNS:1224 *	0 on success, -EACCES if command is aborted or denied (due to1225 *	previous non-volatile SET_MAX) by the drive.  -EIO on other1226 *	errors.1227 */1228static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)1229{1230	unsigned int err_mask;1231	struct ata_taskfile tf;1232	int lba48 = ata_id_has_lba48(dev->id);1233 1234	new_sectors--;1235 1236	ata_tf_init(dev, &tf);1237 1238	tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;1239 1240	if (lba48) {1241		tf.command = ATA_CMD_SET_MAX_EXT;1242		tf.flags |= ATA_TFLAG_LBA48;1243 1244		tf.hob_lbal = (new_sectors >> 24) & 0xff;1245		tf.hob_lbam = (new_sectors >> 32) & 0xff;1246		tf.hob_lbah = (new_sectors >> 40) & 0xff;1247	} else {1248		tf.command = ATA_CMD_SET_MAX;1249 1250		tf.device |= (new_sectors >> 24) & 0xf;1251	}1252 1253	tf.protocol = ATA_PROT_NODATA;1254	tf.device |= ATA_LBA;1255 1256	tf.lbal = (new_sectors >> 0) & 0xff;1257	tf.lbam = (new_sectors >> 8) & 0xff;1258	tf.lbah = (new_sectors >> 16) & 0xff;1259 1260	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);1261	if (err_mask) {1262		ata_dev_warn(dev,1263			     "failed to set max address (err_mask=0x%x)\n",1264			     err_mask);1265		if (err_mask == AC_ERR_DEV &&1266		    (tf.error & (ATA_ABORTED | ATA_IDNF)))1267			return -EACCES;1268		return -EIO;1269	}1270 1271	return 0;1272}1273 1274/**1275 *	ata_hpa_resize		-	Resize a device with an HPA set1276 *	@dev: Device to resize1277 *1278 *	Read the size of an LBA28 or LBA48 disk with HPA features and resize1279 *	it if required to the full size of the media. The caller must check1280 *	the drive has the HPA feature set enabled.1281 *1282 *	RETURNS:1283 *	0 on success, -errno on failure.1284 */1285static int ata_hpa_resize(struct ata_device *dev)1286{1287	bool print_info = ata_dev_print_info(dev);1288	bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA;1289	u64 sectors = ata_id_n_sectors(dev->id);1290	u64 native_sectors;1291	int rc;1292 1293	/* do we need to do it? */1294	if ((dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) ||1295	    !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||1296	    (dev->quirks & ATA_QUIRK_BROKEN_HPA))1297		return 0;1298 1299	/* read native max address */1300	rc = ata_read_native_max_address(dev, &native_sectors);1301	if (rc) {1302		/* If device aborted the command or HPA isn't going to1303		 * be unlocked, skip HPA resizing.1304		 */1305		if (rc == -EACCES || !unlock_hpa) {1306			ata_dev_warn(dev,1307				     "HPA support seems broken, skipping HPA handling\n");1308			dev->quirks |= ATA_QUIRK_BROKEN_HPA;1309 1310			/* we can continue if device aborted the command */1311			if (rc == -EACCES)1312				rc = 0;1313		}1314 1315		return rc;1316	}1317	dev->n_native_sectors = native_sectors;1318 1319	/* nothing to do? */1320	if (native_sectors <= sectors || !unlock_hpa) {1321		if (!print_info || native_sectors == sectors)1322			return 0;1323 1324		if (native_sectors > sectors)1325			ata_dev_info(dev,1326				"HPA detected: current %llu, native %llu\n",1327				(unsigned long long)sectors,1328				(unsigned long long)native_sectors);1329		else if (native_sectors < sectors)1330			ata_dev_warn(dev,1331				"native sectors (%llu) is smaller than sectors (%llu)\n",1332				(unsigned long long)native_sectors,1333				(unsigned long long)sectors);1334		return 0;1335	}1336 1337	/* let's unlock HPA */1338	rc = ata_set_max_sectors(dev, native_sectors);1339	if (rc == -EACCES) {1340		/* if device aborted the command, skip HPA resizing */1341		ata_dev_warn(dev,1342			     "device aborted resize (%llu -> %llu), skipping HPA handling\n",1343			     (unsigned long long)sectors,1344			     (unsigned long long)native_sectors);1345		dev->quirks |= ATA_QUIRK_BROKEN_HPA;1346		return 0;1347	} else if (rc)1348		return rc;1349 1350	/* re-read IDENTIFY data */1351	rc = ata_dev_reread_id(dev, 0);1352	if (rc) {1353		ata_dev_err(dev,1354			    "failed to re-read IDENTIFY data after HPA resizing\n");1355		return rc;1356	}1357 1358	if (print_info) {1359		u64 new_sectors = ata_id_n_sectors(dev->id);1360		ata_dev_info(dev,1361			"HPA unlocked: %llu -> %llu, native %llu\n",1362			(unsigned long long)sectors,1363			(unsigned long long)new_sectors,1364			(unsigned long long)native_sectors);1365	}1366 1367	return 0;1368}1369 1370/**1371 *	ata_dump_id - IDENTIFY DEVICE info debugging output1372 *	@dev: device from which the information is fetched1373 *	@id: IDENTIFY DEVICE page to dump1374 *1375 *	Dump selected 16-bit words from the given IDENTIFY DEVICE1376 *	page.1377 *1378 *	LOCKING:1379 *	caller.1380 */1381 1382static inline void ata_dump_id(struct ata_device *dev, const u16 *id)1383{1384	ata_dev_dbg(dev,1385		"49==0x%04x  53==0x%04x  63==0x%04x  64==0x%04x  75==0x%04x\n"1386		"80==0x%04x  81==0x%04x  82==0x%04x  83==0x%04x  84==0x%04x\n"1387		"88==0x%04x  93==0x%04x\n",1388		id[49], id[53], id[63], id[64], id[75], id[80],1389		id[81], id[82], id[83], id[84], id[88], id[93]);1390}1391 1392/**1393 *	ata_id_xfermask - Compute xfermask from the given IDENTIFY data1394 *	@id: IDENTIFY data to compute xfer mask from1395 *1396 *	Compute the xfermask for this device. This is not as trivial1397 *	as it seems if we must consider early devices correctly.1398 *1399 *	FIXME: pre IDE drive timing (do we care ?).1400 *1401 *	LOCKING:1402 *	None.1403 *1404 *	RETURNS:1405 *	Computed xfermask1406 */1407unsigned int ata_id_xfermask(const u16 *id)1408{1409	unsigned int pio_mask, mwdma_mask, udma_mask;1410 1411	/* Usual case. Word 53 indicates word 64 is valid */1412	if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {1413		pio_mask = id[ATA_ID_PIO_MODES] & 0x03;1414		pio_mask <<= 3;1415		pio_mask |= 0x7;1416	} else {1417		/* If word 64 isn't valid then Word 51 high byte holds1418		 * the PIO timing number for the maximum. Turn it into1419		 * a mask.1420		 */1421		u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;1422		if (mode < 5)	/* Valid PIO range */1423			pio_mask = (2 << mode) - 1;1424		else1425			pio_mask = 1;1426 1427		/* But wait.. there's more. Design your standards by1428		 * committee and you too can get a free iordy field to1429		 * process. However it is the speeds not the modes that1430		 * are supported... Note drivers using the timing API1431		 * will get this right anyway1432		 */1433	}1434 1435	mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;1436 1437	if (ata_id_is_cfa(id)) {1438		/*1439		 *	Process compact flash extended modes1440		 */1441		int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7;1442		int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7;1443 1444		if (pio)1445			pio_mask |= (1 << 5);1446		if (pio > 1)1447			pio_mask |= (1 << 6);1448		if (dma)1449			mwdma_mask |= (1 << 3);1450		if (dma > 1)1451			mwdma_mask |= (1 << 4);1452	}1453 1454	udma_mask = 0;1455	if (id[ATA_ID_FIELD_VALID] & (1 << 2))1456		udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;1457 1458	return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);1459}1460EXPORT_SYMBOL_GPL(ata_id_xfermask);1461 1462static void ata_qc_complete_internal(struct ata_queued_cmd *qc)1463{1464	struct completion *waiting = qc->private_data;1465 1466	complete(waiting);1467}1468 1469/**1470 *	ata_exec_internal - execute libata internal command1471 *	@dev: Device to which the command is sent1472 *	@tf: Taskfile registers for the command and the result1473 *	@cdb: CDB for packet command1474 *	@dma_dir: Data transfer direction of the command1475 *	@buf: Data buffer of the command1476 *	@buflen: Length of data buffer1477 *	@timeout: Timeout in msecs (0 for default)1478 *1479 *	Executes libata internal command with timeout. @tf contains1480 *	the command on entry and the result on return. Timeout and error1481 *	conditions are reported via the return value. No recovery action1482 *	is taken after a command times out. It is the caller's duty to1483 *	clean up after timeout.1484 *1485 *	LOCKING:1486 *	None.  Should be called with kernel context, might sleep.1487 *1488 *	RETURNS:1489 *	Zero on success, AC_ERR_* mask on failure1490 */1491unsigned int ata_exec_internal(struct ata_device *dev, struct ata_taskfile *tf,1492			       const u8 *cdb, enum dma_data_direction dma_dir,1493			       void *buf, unsigned int buflen,1494			       unsigned int timeout)1495{1496	struct ata_link *link = dev->link;1497	struct ata_port *ap = link->ap;1498	u8 command = tf->command;1499	struct ata_queued_cmd *qc;1500	struct scatterlist sgl;1501	unsigned int preempted_tag;1502	u32 preempted_sactive;1503	u64 preempted_qc_active;1504	int preempted_nr_active_links;1505	bool auto_timeout = false;1506	DECLARE_COMPLETION_ONSTACK(wait);1507	unsigned long flags;1508	unsigned int err_mask;1509	int rc;1510 1511	if (WARN_ON(dma_dir != DMA_NONE && !buf))1512		return AC_ERR_INVALID;1513 1514	spin_lock_irqsave(ap->lock, flags);1515 1516	/* No internal command while frozen */1517	if (ata_port_is_frozen(ap)) {1518		spin_unlock_irqrestore(ap->lock, flags);1519		return AC_ERR_SYSTEM;1520	}1521 1522	/* Initialize internal qc */1523	qc = __ata_qc_from_tag(ap, ATA_TAG_INTERNAL);1524 1525	qc->tag = ATA_TAG_INTERNAL;1526	qc->hw_tag = 0;1527	qc->scsicmd = NULL;1528	qc->ap = ap;1529	qc->dev = dev;1530	ata_qc_reinit(qc);1531 1532	preempted_tag = link->active_tag;1533	preempted_sactive = link->sactive;1534	preempted_qc_active = ap->qc_active;1535	preempted_nr_active_links = ap->nr_active_links;1536	link->active_tag = ATA_TAG_POISON;1537	link->sactive = 0;1538	ap->qc_active = 0;1539	ap->nr_active_links = 0;1540 1541	/* Prepare and issue qc */1542	qc->tf = *tf;1543	if (cdb)1544		memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);1545 1546	/* Some SATA bridges need us to indicate data xfer direction */1547	if (tf->protocol == ATAPI_PROT_DMA && (dev->flags & ATA_DFLAG_DMADIR) &&1548	    dma_dir == DMA_FROM_DEVICE)1549		qc->tf.feature |= ATAPI_DMADIR;1550 1551	qc->flags |= ATA_QCFLAG_RESULT_TF;1552	qc->dma_dir = dma_dir;1553	if (dma_dir != DMA_NONE) {1554		sg_init_one(&sgl, buf, buflen);1555		ata_sg_init(qc, &sgl, 1);1556		qc->nbytes = buflen;1557	}1558 1559	qc->private_data = &wait;1560	qc->complete_fn = ata_qc_complete_internal;1561 1562	ata_qc_issue(qc);1563 1564	spin_unlock_irqrestore(ap->lock, flags);1565 1566	if (!timeout) {1567		if (ata_probe_timeout) {1568			timeout = ata_probe_timeout * 1000;1569		} else {1570			timeout = ata_internal_cmd_timeout(dev, command);1571			auto_timeout = true;1572		}1573	}1574 1575	ata_eh_release(ap);1576 1577	rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));1578 1579	ata_eh_acquire(ap);1580 1581	ata_sff_flush_pio_task(ap);1582 1583	if (!rc) {1584		/*1585		 * We are racing with irq here. If we lose, the following test1586		 * prevents us from completing the qc twice. If we win, the port1587		 * is frozen and will be cleaned up by ->post_internal_cmd().1588		 */1589		spin_lock_irqsave(ap->lock, flags);1590		if (qc->flags & ATA_QCFLAG_ACTIVE) {1591			qc->err_mask |= AC_ERR_TIMEOUT;1592			ata_port_freeze(ap);1593			ata_dev_warn(dev, "qc timeout after %u msecs (cmd 0x%x)\n",1594				     timeout, command);1595		}1596		spin_unlock_irqrestore(ap->lock, flags);1597	}1598 1599	if (ap->ops->post_internal_cmd)1600		ap->ops->post_internal_cmd(qc);1601 1602	/* Perform minimal error analysis */1603	if (qc->flags & ATA_QCFLAG_EH) {1604		if (qc->result_tf.status & (ATA_ERR | ATA_DF))1605			qc->err_mask |= AC_ERR_DEV;1606 1607		if (!qc->err_mask)1608			qc->err_mask |= AC_ERR_OTHER;1609 1610		if (qc->err_mask & ~AC_ERR_OTHER)1611			qc->err_mask &= ~AC_ERR_OTHER;1612	} else if (qc->tf.command == ATA_CMD_REQ_SENSE_DATA) {1613		qc->result_tf.status |= ATA_SENSE;1614	}1615 1616	/* Finish up */1617	spin_lock_irqsave(ap->lock, flags);1618 1619	*tf = qc->result_tf;1620	err_mask = qc->err_mask;1621 1622	ata_qc_free(qc);1623	link->active_tag = preempted_tag;1624	link->sactive = preempted_sactive;1625	ap->qc_active = preempted_qc_active;1626	ap->nr_active_links = preempted_nr_active_links;1627 1628	spin_unlock_irqrestore(ap->lock, flags);1629 1630	if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)1631		ata_internal_cmd_timed_out(dev, command);1632 1633	return err_mask;1634}1635 1636/**1637 *	ata_pio_need_iordy	-	check if iordy needed1638 *	@adev: ATA device1639 *1640 *	Check if the current speed of the device requires IORDY. Used1641 *	by various controllers for chip configuration.1642 */1643unsigned int ata_pio_need_iordy(const struct ata_device *adev)1644{1645	/* Don't set IORDY if we're preparing for reset.  IORDY may1646	 * lead to controller lock up on certain controllers if the1647	 * port is not occupied.  See bko#11703 for details.1648	 */1649	if (adev->link->ap->pflags & ATA_PFLAG_RESETTING)1650		return 0;1651	/* Controller doesn't support IORDY.  Probably a pointless1652	 * check as the caller should know this.1653	 */1654	if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)1655		return 0;1656	/* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6.  */1657	if (ata_id_is_cfa(adev->id)1658	    && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))1659		return 0;1660	/* PIO3 and higher it is mandatory */1661	if (adev->pio_mode > XFER_PIO_2)1662		return 1;1663	/* We turn it on when possible */1664	if (ata_id_has_iordy(adev->id))1665		return 1;1666	return 0;1667}1668EXPORT_SYMBOL_GPL(ata_pio_need_iordy);1669 1670/**1671 *	ata_pio_mask_no_iordy	-	Return the non IORDY mask1672 *	@adev: ATA device1673 *1674 *	Compute the highest mode possible if we are not using iordy. Return1675 *	-1 if no iordy mode is available.1676 */1677static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)1678{1679	/* If we have no drive specific rule, then PIO 2 is non IORDY */1680	if (adev->id[ATA_ID_FIELD_VALID] & 2) {	/* EIDE */1681		u16 pio = adev->id[ATA_ID_EIDE_PIO];1682		/* Is the speed faster than the drive allows non IORDY ? */1683		if (pio) {1684			/* This is cycle times not frequency - watch the logic! */1685			if (pio > 240)	/* PIO2 is 240nS per cycle */1686				return 3 << ATA_SHIFT_PIO;1687			return 7 << ATA_SHIFT_PIO;1688		}1689	}1690	return 3 << ATA_SHIFT_PIO;1691}1692 1693/**1694 *	ata_do_dev_read_id		-	default ID read method1695 *	@dev: device1696 *	@tf: proposed taskfile1697 *	@id: data buffer1698 *1699 *	Issue the identify taskfile and hand back the buffer containing1700 *	identify data. For some RAID controllers and for pre ATA devices1701 *	this function is wrapped or replaced by the driver1702 */1703unsigned int ata_do_dev_read_id(struct ata_device *dev,1704				struct ata_taskfile *tf, __le16 *id)1705{1706	return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,1707				     id, sizeof(id[0]) * ATA_ID_WORDS, 0);1708}1709EXPORT_SYMBOL_GPL(ata_do_dev_read_id);1710 1711/**1712 *	ata_dev_read_id - Read ID data from the specified device1713 *	@dev: target device1714 *	@p_class: pointer to class of the target device (may be changed)1715 *	@flags: ATA_READID_* flags1716 *	@id: buffer to read IDENTIFY data into1717 *1718 *	Read ID data from the specified device.  ATA_CMD_ID_ATA is1719 *	performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI1720 *	devices.  This function also issues ATA_CMD_INIT_DEV_PARAMS1721 *	for pre-ATA4 drives.1722 *1723 *	FIXME: ATA_CMD_ID_ATA is optional for early drives and right1724 *	now we abort if we hit that case.1725 *1726 *	LOCKING:1727 *	Kernel thread context (may sleep)1728 *1729 *	RETURNS:1730 *	0 on success, -errno otherwise.1731 */1732int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,1733		    unsigned int flags, u16 *id)1734{1735	struct ata_port *ap = dev->link->ap;1736	unsigned int class = *p_class;1737	struct ata_taskfile tf;1738	unsigned int err_mask = 0;1739	const char *reason;1740	bool is_semb = class == ATA_DEV_SEMB;1741	int may_fallback = 1, tried_spinup = 0;1742	int rc;1743 1744retry:1745	ata_tf_init(dev, &tf);1746 1747	switch (class) {1748	case ATA_DEV_SEMB:1749		class = ATA_DEV_ATA;	/* some hard drives report SEMB sig */1750		fallthrough;1751	case ATA_DEV_ATA:1752	case ATA_DEV_ZAC:1753		tf.command = ATA_CMD_ID_ATA;1754		break;1755	case ATA_DEV_ATAPI:1756		tf.command = ATA_CMD_ID_ATAPI;1757		break;1758	default:1759		rc = -ENODEV;1760		reason = "unsupported class";1761		goto err_out;1762	}1763 1764	tf.protocol = ATA_PROT_PIO;1765 1766	/* Some devices choke if TF registers contain garbage.  Make1767	 * sure those are properly initialized.1768	 */1769	tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;1770 1771	/* Device presence detection is unreliable on some1772	 * controllers.  Always poll IDENTIFY if available.1773	 */1774	tf.flags |= ATA_TFLAG_POLLING;1775 1776	if (ap->ops->read_id)1777		err_mask = ap->ops->read_id(dev, &tf, (__le16 *)id);1778	else1779		err_mask = ata_do_dev_read_id(dev, &tf, (__le16 *)id);1780 1781	if (err_mask) {1782		if (err_mask & AC_ERR_NODEV_HINT) {1783			ata_dev_dbg(dev, "NODEV after polling detection\n");1784			return -ENOENT;1785		}1786 1787		if (is_semb) {1788			ata_dev_info(dev,1789		     "IDENTIFY failed on device w/ SEMB sig, disabled\n");1790			/* SEMB is not supported yet */1791			*p_class = ATA_DEV_SEMB_UNSUP;1792			return 0;1793		}1794 1795		if ((err_mask == AC_ERR_DEV) && (tf.error & ATA_ABORTED)) {1796			/* Device or controller might have reported1797			 * the wrong device class.  Give a shot at the1798			 * other IDENTIFY if the current one is1799			 * aborted by the device.1800			 */1801			if (may_fallback) {1802				may_fallback = 0;1803 1804				if (class == ATA_DEV_ATA)1805					class = ATA_DEV_ATAPI;1806				else1807					class = ATA_DEV_ATA;1808				goto retry;1809			}1810 1811			/* Control reaches here iff the device aborted1812			 * both flavors of IDENTIFYs which happens1813			 * sometimes with phantom devices.1814			 */1815			ata_dev_dbg(dev,1816				    "both IDENTIFYs aborted, assuming NODEV\n");1817			return -ENOENT;1818		}1819 1820		rc = -EIO;1821		reason = "I/O error";1822		goto err_out;1823	}1824 1825	if (dev->quirks & ATA_QUIRK_DUMP_ID) {1826		ata_dev_info(dev, "dumping IDENTIFY data, "1827			    "class=%d may_fallback=%d tried_spinup=%d\n",1828			    class, may_fallback, tried_spinup);1829		print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET,1830			       16, 2, id, ATA_ID_WORDS * sizeof(*id), true);1831	}1832 1833	/* Falling back doesn't make sense if ID data was read1834	 * successfully at least once.1835	 */1836	may_fallback = 0;1837 1838	swap_buf_le16(id, ATA_ID_WORDS);1839 1840	/* sanity check */1841	rc = -EINVAL;1842	reason = "device reports invalid type";1843 1844	if (class == ATA_DEV_ATA || class == ATA_DEV_ZAC) {1845		if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))1846			goto err_out;1847		if (ap->host->flags & ATA_HOST_IGNORE_ATA &&1848							ata_id_is_ata(id)) {1849			ata_dev_dbg(dev,1850				"host indicates ignore ATA devices, ignored\n");1851			return -ENOENT;1852		}1853	} else {1854		if (ata_id_is_ata(id))1855			goto err_out;1856	}1857 1858	if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {1859		tried_spinup = 1;1860		/*1861		 * Drive powered-up in standby mode, and requires a specific1862		 * SET_FEATURES spin-up subcommand before it will accept1863		 * anything other than the original IDENTIFY command.1864		 */1865		err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);1866		if (err_mask && id[2] != 0x738c) {1867			rc = -EIO;1868			reason = "SPINUP failed";1869			goto err_out;1870		}1871		/*1872		 * If the drive initially returned incomplete IDENTIFY info,1873		 * we now must reissue the IDENTIFY command.1874		 */1875		if (id[2] == 0x37c8)1876			goto retry;1877	}1878 1879	if ((flags & ATA_READID_POSTRESET) &&1880	    (class == ATA_DEV_ATA || class == ATA_DEV_ZAC)) {1881		/*1882		 * The exact sequence expected by certain pre-ATA4 drives is:1883		 * SRST RESET1884		 * IDENTIFY (optional in early ATA)1885		 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)1886		 * anything else..1887		 * Some drives were very specific about that exact sequence.1888		 *1889		 * Note that ATA4 says lba is mandatory so the second check1890		 * should never trigger.1891		 */1892		if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {1893			err_mask = ata_dev_init_params(dev, id[3], id[6]);1894			if (err_mask) {1895				rc = -EIO;1896				reason = "INIT_DEV_PARAMS failed";1897				goto err_out;1898			}1899 1900			/* current CHS translation info (id[53-58]) might be1901			 * changed. reread the identify device info.1902			 */1903			flags &= ~ATA_READID_POSTRESET;1904			goto retry;1905		}1906	}1907 1908	*p_class = class;1909 1910	return 0;1911 1912 err_out:1913	ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n",1914		     reason, err_mask);1915	return rc;1916}1917 1918bool ata_dev_power_init_tf(struct ata_device *dev, struct ata_taskfile *tf,1919			   bool set_active)1920{1921	/* Only applies to ATA and ZAC devices */1922	if (dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC)1923		return false;1924 1925	ata_tf_init(dev, tf);1926	tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;1927	tf->protocol = ATA_PROT_NODATA;1928 1929	if (set_active) {1930		/* VERIFY for 1 sector at lba=0 */1931		tf->command = ATA_CMD_VERIFY;1932		tf->nsect = 1;1933		if (dev->flags & ATA_DFLAG_LBA) {1934			tf->flags |= ATA_TFLAG_LBA;1935			tf->device |= ATA_LBA;1936		} else {1937			/* CHS */1938			tf->lbal = 0x1; /* sect */1939		}1940	} else {1941		tf->command = ATA_CMD_STANDBYNOW1;1942	}1943 1944	return true;1945}1946 1947static bool ata_dev_power_is_active(struct ata_device *dev)1948{1949	struct ata_taskfile tf;1950	unsigned int err_mask;1951 1952	ata_tf_init(dev, &tf);1953	tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;1954	tf.protocol = ATA_PROT_NODATA;1955	tf.command = ATA_CMD_CHK_POWER;1956 1957	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);1958	if (err_mask) {1959		ata_dev_err(dev, "Check power mode failed (err_mask=0x%x)\n",1960			    err_mask);1961		/*1962		 * Assume we are in standby mode so that we always force a1963		 * spinup in ata_dev_power_set_active().1964		 */1965		return false;1966	}1967 1968	ata_dev_dbg(dev, "Power mode: 0x%02x\n", tf.nsect);1969 1970	/* Active or idle */1971	return tf.nsect == 0xff;1972}1973 1974/**1975 *	ata_dev_power_set_standby - Set a device power mode to standby1976 *	@dev: target device1977 *1978 *	Issue a STANDBY IMMEDIATE command to set a device power mode to standby.1979 *	For an HDD device, this spins down the disks.1980 *1981 *	LOCKING:1982 *	Kernel thread context (may sleep).1983 */1984void ata_dev_power_set_standby(struct ata_device *dev)1985{1986	unsigned long ap_flags = dev->link->ap->flags;1987	struct ata_taskfile tf;1988	unsigned int err_mask;1989 1990	/* If the device is already sleeping or in standby, do nothing. */1991	if ((dev->flags & ATA_DFLAG_SLEEPING) ||1992	    !ata_dev_power_is_active(dev))1993		return;1994 1995	/*1996	 * Some odd clown BIOSes issue spindown on power off (ACPI S4 or S5)1997	 * causing some drives to spin up and down again. For these, do nothing1998	 * if we are being called on shutdown.1999	 */2000	if ((ap_flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&2001	    system_state == SYSTEM_POWER_OFF)2002		return;2003 2004	if ((ap_flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&2005	    system_entering_hibernation())2006		return;2007 2008	/* Issue STANDBY IMMEDIATE command only if supported by the device */2009	if (!ata_dev_power_init_tf(dev, &tf, false))2010		return;2011 2012	ata_dev_notice(dev, "Entering standby power mode\n");2013 2014	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);2015	if (err_mask)2016		ata_dev_err(dev, "STANDBY IMMEDIATE failed (err_mask=0x%x)\n",2017			    err_mask);2018}2019 2020/**2021 *	ata_dev_power_set_active -  Set a device power mode to active2022 *	@dev: target device2023 *2024 *	Issue a VERIFY command to enter to ensure that the device is in the2025 *	active power mode. For a spun-down HDD (standby or idle power mode),2026 *	the VERIFY command will complete after the disk spins up.2027 *2028 *	LOCKING:2029 *	Kernel thread context (may sleep).2030 */2031void ata_dev_power_set_active(struct ata_device *dev)2032{2033	struct ata_taskfile tf;2034	unsigned int err_mask;2035 2036	/*2037	 * Issue READ VERIFY SECTORS command for 1 sector at lba=0 only2038	 * if supported by the device.2039	 */2040	if (!ata_dev_power_init_tf(dev, &tf, true))2041		return;2042 2043	/*2044	 * Check the device power state & condition and force a spinup with2045	 * VERIFY command only if the drive is not already ACTIVE or IDLE.2046	 */2047	if (ata_dev_power_is_active(dev))2048		return;2049 2050	ata_dev_notice(dev, "Entering active power mode\n");2051 2052	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);2053	if (err_mask)2054		ata_dev_err(dev, "VERIFY failed (err_mask=0x%x)\n",2055			    err_mask);2056}2057 2058/**2059 *	ata_read_log_page - read a specific log page2060 *	@dev: target device2061 *	@log: log to read2062 *	@page: page to read2063 *	@buf: buffer to store read page2064 *	@sectors: number of sectors to read2065 *2066 *	Read log page using READ_LOG_EXT command.2067 *2068 *	LOCKING:2069 *	Kernel thread context (may sleep).2070 *2071 *	RETURNS:2072 *	0 on success, AC_ERR_* mask otherwise.2073 */2074unsigned int ata_read_log_page(struct ata_device *dev, u8 log,2075			       u8 page, void *buf, unsigned int sectors)2076{2077	unsigned long ap_flags = dev->link->ap->flags;2078	struct ata_taskfile tf;2079	unsigned int err_mask;2080	bool dma = false;2081 2082	ata_dev_dbg(dev, "read log page - log 0x%x, page 0x%x\n", log, page);2083 2084	/*2085	 * Return error without actually issuing the command on controllers2086	 * which e.g. lockup on a read log page.2087	 */2088	if (ap_flags & ATA_FLAG_NO_LOG_PAGE)2089		return AC_ERR_DEV;2090 2091retry:2092	ata_tf_init(dev, &tf);2093	if (ata_dma_enabled(dev) && ata_id_has_read_log_dma_ext(dev->id) &&2094	    !(dev->quirks & ATA_QUIRK_NO_DMA_LOG)) {2095		tf.command = ATA_CMD_READ_LOG_DMA_EXT;2096		tf.protocol = ATA_PROT_DMA;2097		dma = true;2098	} else {2099		tf.command = ATA_CMD_READ_LOG_EXT;2100		tf.protocol = ATA_PROT_PIO;2101		dma = false;2102	}2103	tf.lbal = log;2104	tf.lbam = page;2105	tf.nsect = sectors;2106	tf.hob_nsect = sectors >> 8;2107	tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE;2108 2109	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,2110				     buf, sectors * ATA_SECT_SIZE, 0);2111 2112	if (err_mask) {2113		if (dma) {2114			dev->quirks |= ATA_QUIRK_NO_DMA_LOG;2115			if (!ata_port_is_frozen(dev->link->ap))2116				goto retry;2117		}2118		ata_dev_err(dev,2119			    "Read log 0x%02x page 0x%02x failed, Emask 0x%x\n",2120			    (unsigned int)log, (unsigned int)page, err_mask);2121	}2122 2123	return err_mask;2124}2125 2126static int ata_log_supported(struct ata_device *dev, u8 log)2127{2128	if (dev->quirks & ATA_QUIRK_NO_LOG_DIR)2129		return 0;2130 2131	if (ata_read_log_page(dev, ATA_LOG_DIRECTORY, 0, dev->sector_buf, 1))2132		return 0;2133	return get_unaligned_le16(&dev->sector_buf[log * 2]);2134}2135 2136static bool ata_identify_page_supported(struct ata_device *dev, u8 page)2137{2138	unsigned int err, i;2139 2140	if (dev->quirks & ATA_QUIRK_NO_ID_DEV_LOG)2141		return false;2142 2143	if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE)) {2144		/*2145		 * IDENTIFY DEVICE data log is defined as mandatory starting2146		 * with ACS-3 (ATA version 10). Warn about the missing log2147		 * for drives which implement this ATA level or above.2148		 */2149		if (ata_id_major_version(dev->id) >= 10)2150			ata_dev_warn(dev,2151				"ATA Identify Device Log not supported\n");2152		dev->quirks |= ATA_QUIRK_NO_ID_DEV_LOG;2153		return false;2154	}2155 2156	/*2157	 * Read IDENTIFY DEVICE data log, page 0, to figure out if the page is2158	 * supported.2159	 */2160	err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 0,2161				dev->sector_buf, 1);2162	if (err)2163		return false;2164 2165	for (i = 0; i < dev->sector_buf[8]; i++) {2166		if (dev->sector_buf[9 + i] == page)2167			return true;2168	}2169 2170	return false;2171}2172 2173static int ata_do_link_spd_quirk(struct ata_device *dev)2174{2175	struct ata_link *plink = ata_dev_phys_link(dev);2176	u32 target, target_limit;2177 2178	if (!sata_scr_valid(plink))2179		return 0;2180 2181	if (dev->quirks & ATA_QUIRK_1_5_GBPS)2182		target = 1;2183	else2184		return 0;2185 2186	target_limit = (1 << target) - 1;2187 2188	/* if already on stricter limit, no need to push further */2189	if (plink->sata_spd_limit <= target_limit)2190		return 0;2191 2192	plink->sata_spd_limit = target_limit;2193 2194	/* Request another EH round by returning -EAGAIN if link is2195	 * going faster than the target speed.  Forward progress is2196	 * guaranteed by setting sata_spd_limit to target_limit above.2197	 */2198	if (plink->sata_spd > target) {2199		ata_dev_info(dev, "applying link speed limit quirk to %s\n",2200			     sata_spd_string(target));2201		return -EAGAIN;2202	}2203	return 0;2204}2205 2206static inline bool ata_dev_knobble(struct ata_device *dev)2207{2208	struct ata_port *ap = dev->link->ap;2209 2210	if (ata_dev_quirks(dev) & ATA_QUIRK_BRIDGE_OK)2211		return false;2212 2213	return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));2214}2215 2216static void ata_dev_config_ncq_send_recv(struct ata_device *dev)2217{2218	unsigned int err_mask;2219 2220	if (!ata_log_supported(dev, ATA_LOG_NCQ_SEND_RECV)) {2221		ata_dev_warn(dev, "NCQ Send/Recv Log not supported\n");2222		return;2223	}2224	err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_SEND_RECV,2225				     0, dev->sector_buf, 1);2226	if (!err_mask) {2227		u8 *cmds = dev->ncq_send_recv_cmds;2228 2229		dev->flags |= ATA_DFLAG_NCQ_SEND_RECV;2230		memcpy(cmds, dev->sector_buf, ATA_LOG_NCQ_SEND_RECV_SIZE);2231 2232		if (dev->quirks & ATA_QUIRK_NO_NCQ_TRIM) {2233			ata_dev_dbg(dev, "disabling queued TRIM support\n");2234			cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &=2235				~ATA_LOG_NCQ_SEND_RECV_DSM_TRIM;2236		}2237	}2238}2239 2240static void ata_dev_config_ncq_non_data(struct ata_device *dev)2241{2242	unsigned int err_mask;2243 2244	if (!ata_log_supported(dev, ATA_LOG_NCQ_NON_DATA)) {2245		ata_dev_warn(dev,2246			     "NCQ Send/Recv Log not supported\n");2247		return;2248	}2249	err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_NON_DATA,2250				     0, dev->sector_buf, 1);2251	if (!err_mask)2252		memcpy(dev->ncq_non_data_cmds, dev->sector_buf,2253		       ATA_LOG_NCQ_NON_DATA_SIZE);2254}2255 2256static void ata_dev_config_ncq_prio(struct ata_device *dev)2257{2258	unsigned int err_mask;2259 2260	if (!ata_identify_page_supported(dev, ATA_LOG_SATA_SETTINGS))2261		return;2262 2263	err_mask = ata_read_log_page(dev,2264				     ATA_LOG_IDENTIFY_DEVICE,2265				     ATA_LOG_SATA_SETTINGS,2266				     dev->sector_buf, 1);2267	if (err_mask)2268		goto not_supported;2269 2270	if (!(dev->sector_buf[ATA_LOG_NCQ_PRIO_OFFSET] & BIT(3)))2271		goto not_supported;2272 2273	dev->flags |= ATA_DFLAG_NCQ_PRIO;2274 2275	return;2276 2277not_supported:2278	dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLED;2279	dev->flags &= ~ATA_DFLAG_NCQ_PRIO;2280}2281 2282static bool ata_dev_check_adapter(struct ata_device *dev,2283				  unsigned short vendor_id)2284{2285	struct pci_dev *pcidev = NULL;2286	struct device *parent_dev = NULL;2287 2288	for (parent_dev = dev->tdev.parent; parent_dev != NULL;2289	     parent_dev = parent_dev->parent) {2290		if (dev_is_pci(parent_dev)) {2291			pcidev = to_pci_dev(parent_dev);2292			if (pcidev->vendor == vendor_id)2293				return true;2294			break;2295		}2296	}2297 2298	return false;2299}2300 2301static int ata_dev_config_ncq(struct ata_device *dev,2302			       char *desc, size_t desc_sz)2303{2304	struct ata_port *ap = dev->link->ap;2305	int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);2306	unsigned int err_mask;2307	char *aa_desc = "";2308 2309	if (!ata_id_has_ncq(dev->id)) {2310		desc[0] = '\0';2311		return 0;2312	}2313	if (!IS_ENABLED(CONFIG_SATA_HOST))2314		return 0;2315	if (dev->quirks & ATA_QUIRK_NONCQ) {2316		snprintf(desc, desc_sz, "NCQ (not used)");2317		return 0;2318	}2319 2320	if (dev->quirks & ATA_QUIRK_NO_NCQ_ON_ATI &&2321	    ata_dev_check_adapter(dev, PCI_VENDOR_ID_ATI)) {2322		snprintf(desc, desc_sz, "NCQ (not used)");2323		return 0;2324	}2325 2326	if (ap->flags & ATA_FLAG_NCQ) {2327		hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE);2328		dev->flags |= ATA_DFLAG_NCQ;2329	}2330 2331	if (!(dev->quirks & ATA_QUIRK_BROKEN_FPDMA_AA) &&2332		(ap->flags & ATA_FLAG_FPDMA_AA) &&2333		ata_id_has_fpdma_aa(dev->id)) {2334		err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,2335			SATA_FPDMA_AA);2336		if (err_mask) {2337			ata_dev_err(dev,2338				    "failed to enable AA (error_mask=0x%x)\n",2339				    err_mask);2340			if (err_mask != AC_ERR_DEV) {2341				dev->quirks |= ATA_QUIRK_BROKEN_FPDMA_AA;2342				return -EIO;2343			}2344		} else2345			aa_desc = ", AA";2346	}2347 2348	if (hdepth >= ddepth)2349		snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);2350	else2351		snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,2352			ddepth, aa_desc);2353 2354	if ((ap->flags & ATA_FLAG_FPDMA_AUX)) {2355		if (ata_id_has_ncq_send_and_recv(dev->id))2356			ata_dev_config_ncq_send_recv(dev);2357		if (ata_id_has_ncq_non_data(dev->id))2358			ata_dev_config_ncq_non_data(dev);2359		if (ata_id_has_ncq_prio(dev->id))2360			ata_dev_config_ncq_prio(dev);2361	}2362 2363	return 0;2364}2365 2366static void ata_dev_config_sense_reporting(struct ata_device *dev)2367{2368	unsigned int err_mask;2369 2370	if (!ata_id_has_sense_reporting(dev->id))2371		return;2372 2373	if (ata_id_sense_reporting_enabled(dev->id))2374		return;2375 2376	err_mask = ata_dev_set_feature(dev, SETFEATURE_SENSE_DATA, 0x1);2377	if (err_mask) {2378		ata_dev_dbg(dev,2379			    "failed to enable Sense Data Reporting, Emask 0x%x\n",2380			    err_mask);2381	}2382}2383 2384static void ata_dev_config_zac(struct ata_device *dev)2385{2386	unsigned int err_mask;2387	u8 *identify_buf = dev->sector_buf;2388 2389	dev->zac_zones_optimal_open = U32_MAX;2390	dev->zac_zones_optimal_nonseq = U32_MAX;2391	dev->zac_zones_max_open = U32_MAX;2392 2393	/*2394	 * Always set the 'ZAC' flag for Host-managed devices.2395	 */2396	if (dev->class == ATA_DEV_ZAC)2397		dev->flags |= ATA_DFLAG_ZAC;2398	else if (ata_id_zoned_cap(dev->id) == 0x01)2399		/*2400		 * Check for host-aware devices.2401		 */2402		dev->flags |= ATA_DFLAG_ZAC;2403 2404	if (!(dev->flags & ATA_DFLAG_ZAC))2405		return;2406 2407	if (!ata_identify_page_supported(dev, ATA_LOG_ZONED_INFORMATION)) {2408		ata_dev_warn(dev,2409			     "ATA Zoned Information Log not supported\n");2410		return;2411	}2412 2413	/*2414	 * Read IDENTIFY DEVICE data log, page 9 (Zoned-device information)2415	 */2416	err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE,2417				     ATA_LOG_ZONED_INFORMATION,2418				     identify_buf, 1);2419	if (!err_mask) {2420		u64 zoned_cap, opt_open, opt_nonseq, max_open;2421 2422		zoned_cap = get_unaligned_le64(&identify_buf[8]);2423		if ((zoned_cap >> 63))2424			dev->zac_zoned_cap = (zoned_cap & 1);2425		opt_open = get_unaligned_le64(&identify_buf[24]);2426		if ((opt_open >> 63))2427			dev->zac_zones_optimal_open = (u32)opt_open;2428		opt_nonseq = get_unaligned_le64(&identify_buf[32]);2429		if ((opt_nonseq >> 63))2430			dev->zac_zones_optimal_nonseq = (u32)opt_nonseq;2431		max_open = get_unaligned_le64(&identify_buf[40]);2432		if ((max_open >> 63))2433			dev->zac_zones_max_open = (u32)max_open;2434	}2435}2436 2437static void ata_dev_config_trusted(struct ata_device *dev)2438{2439	u64 trusted_cap;2440	unsigned int err;2441 2442	if (!ata_id_has_trusted(dev->id))2443		return;2444 2445	if (!ata_identify_page_supported(dev, ATA_LOG_SECURITY)) {2446		ata_dev_warn(dev,2447			     "Security Log not supported\n");2448		return;2449	}2450 2451	err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, ATA_LOG_SECURITY,2452				dev->sector_buf, 1);2453	if (err)2454		return;2455 2456	trusted_cap = get_unaligned_le64(&dev->sector_buf[40]);2457	if (!(trusted_cap & (1ULL << 63))) {2458		ata_dev_dbg(dev,2459			    "Trusted Computing capability qword not valid!\n");2460		return;2461	}2462 2463	if (trusted_cap & (1 << 0))2464		dev->flags |= ATA_DFLAG_TRUSTED;2465}2466 2467void ata_dev_cleanup_cdl_resources(struct ata_device *dev)2468{2469	kfree(dev->cdl);2470	dev->cdl = NULL;2471}2472 2473static int ata_dev_init_cdl_resources(struct ata_device *dev)2474{2475	struct ata_cdl *cdl = dev->cdl;2476	unsigned int err_mask;2477 2478	if (!cdl) {2479		cdl = kzalloc(sizeof(*cdl), GFP_KERNEL);2480		if (!cdl)2481			return -ENOMEM;2482		dev->cdl = cdl;2483	}2484 2485	err_mask = ata_read_log_page(dev, ATA_LOG_CDL, 0, cdl->desc_log_buf,2486				     ATA_LOG_CDL_SIZE / ATA_SECT_SIZE);2487	if (err_mask) {2488		ata_dev_warn(dev, "Read Command Duration Limits log failed\n");2489		ata_dev_cleanup_cdl_resources(dev);2490		return -EIO;2491	}2492 2493	return 0;2494}2495 2496static void ata_dev_config_cdl(struct ata_device *dev)2497{2498	unsigned int err_mask;2499	bool cdl_enabled;2500	u64 val;2501	int ret;2502 2503	if (ata_id_major_version(dev->id) < 11)2504		goto not_supported;2505 2506	if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE) ||2507	    !ata_identify_page_supported(dev, ATA_LOG_SUPPORTED_CAPABILITIES) ||2508	    !ata_identify_page_supported(dev, ATA_LOG_CURRENT_SETTINGS))2509		goto not_supported;2510 2511	err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE,2512				     ATA_LOG_SUPPORTED_CAPABILITIES,2513				     dev->sector_buf, 1);2514	if (err_mask)2515		goto not_supported;2516 2517	/* Check Command Duration Limit Supported bits */2518	val = get_unaligned_le64(&dev->sector_buf[168]);2519	if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(0)))2520		goto not_supported;2521 2522	/* Warn the user if command duration guideline is not supported */2523	if (!(val & BIT_ULL(1)))2524		ata_dev_warn(dev,2525			"Command duration guideline is not supported\n");2526 2527	/*2528	 * We must have support for the sense data for successful NCQ commands2529	 * log indicated by the successful NCQ command sense data supported bit.2530	 */2531	val = get_unaligned_le64(&dev->sector_buf[8]);2532	if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(47))) {2533		ata_dev_warn(dev,2534			"CDL supported but Successful NCQ Command Sense Data is not supported\n");2535		goto not_supported;2536	}2537 2538	/* Without NCQ autosense, the successful NCQ commands log is useless. */2539	if (!ata_id_has_ncq_autosense(dev->id)) {2540		ata_dev_warn(dev,2541			"CDL supported but NCQ autosense is not supported\n");2542		goto not_supported;2543	}2544 2545	/*2546	 * If CDL is marked as enabled, make sure the feature is enabled too.2547	 * Conversely, if CDL is disabled, make sure the feature is turned off.2548	 */2549	err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE,2550				     ATA_LOG_CURRENT_SETTINGS,2551				     dev->sector_buf, 1);2552	if (err_mask)2553		goto not_supported;2554 2555	val = get_unaligned_le64(&dev->sector_buf[8]);2556	cdl_enabled = val & BIT_ULL(63) && val & BIT_ULL(21);2557	if (dev->flags & ATA_DFLAG_CDL_ENABLED) {2558		if (!cdl_enabled) {2559			/* Enable CDL on the device */2560			err_mask = ata_dev_set_feature(dev, SETFEATURES_CDL, 1);2561			if (err_mask) {2562				ata_dev_err(dev,2563					    "Enable CDL feature failed\n");2564				goto not_supported;2565			}2566		}2567	} else {2568		if (cdl_enabled) {2569			/* Disable CDL on the device */2570			err_mask = ata_dev_set_feature(dev, SETFEATURES_CDL, 0);2571			if (err_mask) {2572				ata_dev_err(dev,2573					    "Disable CDL feature failed\n");2574				goto not_supported;2575			}2576		}2577	}2578 2579	/*2580	 * While CDL itself has to be enabled using sysfs, CDL requires that2581	 * sense data for successful NCQ commands is enabled to work properly.2582	 * Just like ata_dev_config_sense_reporting(), enable it unconditionally2583	 * if supported.2584	 */2585	if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(18))) {2586		err_mask = ata_dev_set_feature(dev,2587					SETFEATURE_SENSE_DATA_SUCC_NCQ, 0x1);2588		if (err_mask) {2589			ata_dev_warn(dev,2590				     "failed to enable Sense Data for successful NCQ commands, Emask 0x%x\n",2591				     err_mask);2592			goto not_supported;2593		}2594	}2595 2596	/* CDL is supported: allocate and initialize needed resources. */2597	ret = ata_dev_init_cdl_resources(dev);2598	if (ret) {2599		ata_dev_warn(dev, "Initialize CDL resources failed\n");2600		goto not_supported;2601	}2602 2603	dev->flags |= ATA_DFLAG_CDL;2604 2605	return;2606 2607not_supported:2608	dev->flags &= ~(ATA_DFLAG_CDL | ATA_DFLAG_CDL_ENABLED);2609	ata_dev_cleanup_cdl_resources(dev);2610}2611 2612static int ata_dev_config_lba(struct ata_device *dev)2613{2614	const u16 *id = dev->id;2615	const char *lba_desc;2616	char ncq_desc[32];2617	int ret;2618 2619	dev->flags |= ATA_DFLAG_LBA;2620 2621	if (ata_id_has_lba48(id)) {2622		lba_desc = "LBA48";2623		dev->flags |= ATA_DFLAG_LBA48;2624		if (dev->n_sectors >= (1UL << 28) &&2625		    ata_id_has_flush_ext(id))2626			dev->flags |= ATA_DFLAG_FLUSH_EXT;2627	} else {2628		lba_desc = "LBA";2629	}2630 2631	/* config NCQ */2632	ret = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));2633 2634	/* print device info to dmesg */2635	if (ata_dev_print_info(dev))2636		ata_dev_info(dev,2637			     "%llu sectors, multi %u: %s %s\n",2638			     (unsigned long long)dev->n_sectors,2639			     dev->multi_count, lba_desc, ncq_desc);2640 2641	return ret;2642}2643 2644static void ata_dev_config_chs(struct ata_device *dev)2645{2646	const u16 *id = dev->id;2647 2648	if (ata_id_current_chs_valid(id)) {2649		/* Current CHS translation is valid. */2650		dev->cylinders = id[54];2651		dev->heads     = id[55];2652		dev->sectors   = id[56];2653	} else {2654		/* Default translation */2655		dev->cylinders	= id[1];2656		dev->heads	= id[3];2657		dev->sectors	= id[6];2658	}2659 2660	/* print device info to dmesg */2661	if (ata_dev_print_info(dev))2662		ata_dev_info(dev,2663			     "%llu sectors, multi %u, CHS %u/%u/%u\n",2664			     (unsigned long long)dev->n_sectors,2665			     dev->multi_count, dev->cylinders,2666			     dev->heads, dev->sectors);2667}2668 2669static void ata_dev_config_fua(struct ata_device *dev)2670{2671	/* Ignore FUA support if its use is disabled globally */2672	if (!libata_fua)2673		goto nofua;2674 2675	/* Ignore devices without support for WRITE DMA FUA EXT */2676	if (!(dev->flags & ATA_DFLAG_LBA48) || !ata_id_has_fua(dev->id))2677		goto nofua;2678 2679	/* Ignore known bad devices and devices that lack NCQ support */2680	if (!ata_ncq_supported(dev) || (dev->quirks & ATA_QUIRK_NO_FUA))2681		goto nofua;2682 2683	dev->flags |= ATA_DFLAG_FUA;2684 2685	return;2686 2687nofua:2688	dev->flags &= ~ATA_DFLAG_FUA;2689}2690 2691static void ata_dev_config_devslp(struct ata_device *dev)2692{2693	u8 *sata_setting = dev->sector_buf;2694	unsigned int err_mask;2695	int i, j;2696 2697	/*2698	 * Check device sleep capability. Get DevSlp timing variables2699	 * from SATA Settings page of Identify Device Data Log.2700	 */2701	if (!ata_id_has_devslp(dev->id) ||2702	    !ata_identify_page_supported(dev, ATA_LOG_SATA_SETTINGS))2703		return;2704 2705	err_mask = ata_read_log_page(dev,2706				     ATA_LOG_IDENTIFY_DEVICE,2707				     ATA_LOG_SATA_SETTINGS,2708				     sata_setting, 1);2709	if (err_mask)2710		return;2711 2712	dev->flags |= ATA_DFLAG_DEVSLP;2713	for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) {2714		j = ATA_LOG_DEVSLP_OFFSET + i;2715		dev->devslp_timing[i] = sata_setting[j];2716	}2717}2718 2719static void ata_dev_config_cpr(struct ata_device *dev)2720{2721	unsigned int err_mask;2722	size_t buf_len;2723	int i, nr_cpr = 0;2724	struct ata_cpr_log *cpr_log = NULL;2725	u8 *desc, *buf = NULL;2726 2727	if (ata_id_major_version(dev->id) < 11)2728		goto out;2729 2730	buf_len = ata_log_supported(dev, ATA_LOG_CONCURRENT_POSITIONING_RANGES);2731	if (buf_len == 0)2732		goto out;2733 2734	/*2735	 * Read the concurrent positioning ranges log (0x47). We can have at2736	 * most 255 32B range descriptors plus a 64B header. This log varies in2737	 * size, so use the size reported in the GPL directory. Reading beyond2738	 * the supported length will result in an error.2739	 */2740	buf_len <<= 9;2741	buf = kzalloc(buf_len, GFP_KERNEL);2742	if (!buf)2743		goto out;2744 2745	err_mask = ata_read_log_page(dev, ATA_LOG_CONCURRENT_POSITIONING_RANGES,2746				     0, buf, buf_len >> 9);2747	if (err_mask)2748		goto out;2749 2750	nr_cpr = buf[0];2751	if (!nr_cpr)2752		goto out;2753 2754	cpr_log = kzalloc(struct_size(cpr_log, cpr, nr_cpr), GFP_KERNEL);2755	if (!cpr_log)2756		goto out;2757 2758	cpr_log->nr_cpr = nr_cpr;2759	desc = &buf[64];2760	for (i = 0; i < nr_cpr; i++, desc += 32) {2761		cpr_log->cpr[i].num = desc[0];2762		cpr_log->cpr[i].num_storage_elements = desc[1];2763		cpr_log->cpr[i].start_lba = get_unaligned_le64(&desc[8]);2764		cpr_log->cpr[i].num_lbas = get_unaligned_le64(&desc[16]);2765	}2766 2767out:2768	swap(dev->cpr_log, cpr_log);2769	kfree(cpr_log);2770	kfree(buf);2771}2772 2773static void ata_dev_print_features(struct ata_device *dev)2774{2775	if (!(dev->flags & ATA_DFLAG_FEATURES_MASK))2776		return;2777 2778	ata_dev_info(dev,2779		     "Features:%s%s%s%s%s%s%s%s\n",2780		     dev->flags & ATA_DFLAG_FUA ? " FUA" : "",2781		     dev->flags & ATA_DFLAG_TRUSTED ? " Trust" : "",2782		     dev->flags & ATA_DFLAG_DA ? " Dev-Attention" : "",2783		     dev->flags & ATA_DFLAG_DEVSLP ? " Dev-Sleep" : "",2784		     dev->flags & ATA_DFLAG_NCQ_SEND_RECV ? " NCQ-sndrcv" : "",2785		     dev->flags & ATA_DFLAG_NCQ_PRIO ? " NCQ-prio" : "",2786		     dev->flags & ATA_DFLAG_CDL ? " CDL" : "",2787		     dev->cpr_log ? " CPR" : "");2788}2789 2790/**2791 *	ata_dev_configure - Configure the specified ATA/ATAPI device2792 *	@dev: Target device to configure2793 *2794 *	Configure @dev according to @dev->id.  Generic and low-level2795 *	driver specific fixups are also applied.2796 *2797 *	LOCKING:2798 *	Kernel thread context (may sleep)2799 *2800 *	RETURNS:2801 *	0 on success, -errno otherwise2802 */2803int ata_dev_configure(struct ata_device *dev)2804{2805	struct ata_port *ap = dev->link->ap;2806	bool print_info = ata_dev_print_info(dev);2807	const u16 *id = dev->id;2808	unsigned int xfer_mask;2809	unsigned int err_mask;2810	char revbuf[7];		/* XYZ-99\0 */2811	char fwrevbuf[ATA_ID_FW_REV_LEN+1];2812	char modelbuf[ATA_ID_PROD_LEN+1];2813	int rc;2814 2815	if (!ata_dev_enabled(dev)) {2816		ata_dev_dbg(dev, "no device\n");2817		return 0;2818	}2819 2820	/* Set quirks */2821	dev->quirks |= ata_dev_quirks(dev);2822	ata_force_quirks(dev);2823 2824	if (dev->quirks & ATA_QUIRK_DISABLE) {2825		ata_dev_info(dev, "unsupported device, disabling\n");2826		ata_dev_disable(dev);2827		return 0;2828	}2829 2830	if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&2831	    dev->class == ATA_DEV_ATAPI) {2832		ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n",2833			     atapi_enabled ? "not supported with this driver"2834			     : "disabled");2835		ata_dev_disable(dev);2836		return 0;2837	}2838 2839	rc = ata_do_link_spd_quirk(dev);2840	if (rc)2841		return rc;2842 2843	/* some WD SATA-1 drives have issues with LPM, turn on NOLPM for them */2844	if ((dev->quirks & ATA_QUIRK_WD_BROKEN_LPM) &&2845	    (id[ATA_ID_SATA_CAPABILITY] & 0xe) == 0x2)2846		dev->quirks |= ATA_QUIRK_NOLPM;2847 2848	if (ap->flags & ATA_FLAG_NO_LPM)2849		dev->quirks |= ATA_QUIRK_NOLPM;2850 2851	if (dev->quirks & ATA_QUIRK_NOLPM) {2852		ata_dev_warn(dev, "LPM support broken, forcing max_power\n");2853		dev->link->ap->target_lpm_policy = ATA_LPM_MAX_POWER;2854	}2855 2856	/* let ACPI work its magic */2857	rc = ata_acpi_on_devcfg(dev);2858	if (rc)2859		return rc;2860 2861	/* massage HPA, do it early as it might change IDENTIFY data */2862	rc = ata_hpa_resize(dev);2863	if (rc)2864		return rc;2865 2866	/* print device capabilities */2867	ata_dev_dbg(dev,2868		    "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "2869		    "85:%04x 86:%04x 87:%04x 88:%04x\n",2870		    __func__,2871		    id[49], id[82], id[83], id[84],2872		    id[85], id[86], id[87], id[88]);2873 2874	/* initialize to-be-configured parameters */2875	dev->flags &= ~ATA_DFLAG_CFG_MASK;2876	dev->max_sectors = 0;2877	dev->cdb_len = 0;2878	dev->n_sectors = 0;2879	dev->cylinders = 0;2880	dev->heads = 0;2881	dev->sectors = 0;2882	dev->multi_count = 0;2883 2884	/*2885	 * common ATA, ATAPI feature tests2886	 */2887 2888	/* find max transfer mode; for printk only */2889	xfer_mask = ata_id_xfermask(id);2890 2891	ata_dump_id(dev, id);2892 2893	/* SCSI only uses 4-char revisions, dump full 8 chars from ATA */2894	ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,2895			sizeof(fwrevbuf));2896 2897	ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,2898			sizeof(modelbuf));2899 2900	/* ATA-specific feature tests */2901	if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {2902		if (ata_id_is_cfa(id)) {2903			/* CPRM may make this media unusable */2904			if (id[ATA_ID_CFA_KEY_MGMT] & 1)2905				ata_dev_warn(dev,2906	"supports DRM functions and may not be fully accessible\n");2907			snprintf(revbuf, 7, "CFA");2908		} else {2909			snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));2910			/* Warn the user if the device has TPM extensions */2911			if (ata_id_has_tpm(id))2912				ata_dev_warn(dev,2913	"supports DRM functions and may not be fully accessible\n");2914		}2915 2916		dev->n_sectors = ata_id_n_sectors(id);2917 2918		/* get current R/W Multiple count setting */2919		if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) {2920			unsigned int max = dev->id[47] & 0xff;2921			unsigned int cnt = dev->id[59] & 0xff;2922			/* only recognize/allow powers of two here */2923			if (is_power_of_2(max) && is_power_of_2(cnt))2924				if (cnt <= max)2925					dev->multi_count = cnt;2926		}2927 2928		/* print device info to dmesg */2929		if (print_info)2930			ata_dev_info(dev, "%s: %s, %s, max %s\n",2931				     revbuf, modelbuf, fwrevbuf,2932				     ata_mode_string(xfer_mask));2933 2934		if (ata_id_has_lba(id)) {2935			rc = ata_dev_config_lba(dev);2936			if (rc)2937				return rc;2938		} else {2939			ata_dev_config_chs(dev);2940		}2941 2942		ata_dev_config_fua(dev);2943		ata_dev_config_devslp(dev);2944		ata_dev_config_sense_reporting(dev);2945		ata_dev_config_zac(dev);2946		ata_dev_config_trusted(dev);2947		ata_dev_config_cpr(dev);2948		ata_dev_config_cdl(dev);2949		dev->cdb_len = 32;2950 2951		if (print_info)2952			ata_dev_print_features(dev);2953	}2954 2955	/* ATAPI-specific feature tests */2956	else if (dev->class == ATA_DEV_ATAPI) {2957		const char *cdb_intr_string = "";2958		const char *atapi_an_string = "";2959		const char *dma_dir_string = "";2960		u32 sntf;2961 2962		rc = atapi_cdb_len(id);2963		if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {2964			ata_dev_warn(dev, "unsupported CDB len %d\n", rc);2965			rc = -EINVAL;2966			goto err_out_nosup;2967		}2968		dev->cdb_len = (unsigned int) rc;2969 2970		/* Enable ATAPI AN if both the host and device have2971		 * the support.  If PMP is attached, SNTF is required2972		 * to enable ATAPI AN to discern between PHY status2973		 * changed notifications and ATAPI ANs.2974		 */2975		if (atapi_an &&2976		    (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&2977		    (!sata_pmp_attached(ap) ||2978		     sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {2979			/* issue SET feature command to turn this on */2980			err_mask = ata_dev_set_feature(dev,2981					SETFEATURES_SATA_ENABLE, SATA_AN);2982			if (err_mask)2983				ata_dev_err(dev,2984					    "failed to enable ATAPI AN (err_mask=0x%x)\n",2985					    err_mask);2986			else {2987				dev->flags |= ATA_DFLAG_AN;2988				atapi_an_string = ", ATAPI AN";2989			}2990		}2991 2992		if (ata_id_cdb_intr(dev->id)) {2993			dev->flags |= ATA_DFLAG_CDB_INTR;2994			cdb_intr_string = ", CDB intr";2995		}2996 2997		if (atapi_dmadir || (dev->quirks & ATA_QUIRK_ATAPI_DMADIR) ||2998		    atapi_id_dmadir(dev->id)) {2999			dev->flags |= ATA_DFLAG_DMADIR;3000			dma_dir_string = ", DMADIR";3001		}3002 3003		if (ata_id_has_da(dev->id)) {3004			dev->flags |= ATA_DFLAG_DA;3005			zpodd_init(dev);3006		}3007 3008		/* print device info to dmesg */3009		if (print_info)3010			ata_dev_info(dev,3011				     "ATAPI: %s, %s, max %s%s%s%s\n",3012				     modelbuf, fwrevbuf,3013				     ata_mode_string(xfer_mask),3014				     cdb_intr_string, atapi_an_string,3015				     dma_dir_string);3016	}3017 3018	/* determine max_sectors */3019	dev->max_sectors = ATA_MAX_SECTORS;3020	if (dev->flags & ATA_DFLAG_LBA48)3021		dev->max_sectors = ATA_MAX_SECTORS_LBA48;3022 3023	/* Limit PATA drive on SATA cable bridge transfers to udma5,3024	   200 sectors */3025	if (ata_dev_knobble(dev)) {3026		if (print_info)3027			ata_dev_info(dev, "applying bridge limits\n");3028		dev->udma_mask &= ATA_UDMA5;3029		dev->max_sectors = ATA_MAX_SECTORS;3030	}3031 3032	if ((dev->class == ATA_DEV_ATAPI) &&3033	    (atapi_command_packet_set(id) == TYPE_TAPE)) {3034		dev->max_sectors = ATA_MAX_SECTORS_TAPE;3035		dev->quirks |= ATA_QUIRK_STUCK_ERR;3036	}3037 3038	if (dev->quirks & ATA_QUIRK_MAX_SEC_128)3039		dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,3040					 dev->max_sectors);3041 3042	if (dev->quirks & ATA_QUIRK_MAX_SEC_1024)3043		dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_1024,3044					 dev->max_sectors);3045 3046	if (dev->quirks & ATA_QUIRK_MAX_SEC_LBA48)3047		dev->max_sectors = ATA_MAX_SECTORS_LBA48;3048 3049	if (ap->ops->dev_config)3050		ap->ops->dev_config(dev);3051 3052	if (dev->quirks & ATA_QUIRK_DIAGNOSTIC) {3053		/* Let the user know. We don't want to disallow opens for3054		   rescue purposes, or in case the vendor is just a blithering3055		   idiot. Do this after the dev_config call as some controllers3056		   with buggy firmware may want to avoid reporting false device3057		   bugs */3058 3059		if (print_info) {3060			ata_dev_warn(dev,3061"Drive reports diagnostics failure. This may indicate a drive\n");3062			ata_dev_warn(dev,3063"fault or invalid emulation. Contact drive vendor for information.\n");3064		}3065	}3066 3067	if ((dev->quirks & ATA_QUIRK_FIRMWARE_WARN) && print_info) {3068		ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n");3069		ata_dev_warn(dev, "         contact the vendor or visit http://ata.wiki.kernel.org\n");3070	}3071 3072	return 0;3073 3074err_out_nosup:3075	return rc;3076}3077 3078/**3079 *	ata_cable_40wire	-	return 40 wire cable type3080 *	@ap: port3081 *3082 *	Helper method for drivers which want to hardwire 40 wire cable3083 *	detection.3084 */3085 3086int ata_cable_40wire(struct ata_port *ap)3087{3088	return ATA_CBL_PATA40;3089}3090EXPORT_SYMBOL_GPL(ata_cable_40wire);3091 3092/**3093 *	ata_cable_80wire	-	return 80 wire cable type3094 *	@ap: port3095 *3096 *	Helper method for drivers which want to hardwire 80 wire cable3097 *	detection.3098 */3099 3100int ata_cable_80wire(struct ata_port *ap)3101{3102	return ATA_CBL_PATA80;3103}3104EXPORT_SYMBOL_GPL(ata_cable_80wire);3105 3106/**3107 *	ata_cable_unknown	-	return unknown PATA cable.3108 *	@ap: port3109 *3110 *	Helper method for drivers which have no PATA cable detection.3111 */3112 3113int ata_cable_unknown(struct ata_port *ap)3114{3115	return ATA_CBL_PATA_UNK;3116}3117EXPORT_SYMBOL_GPL(ata_cable_unknown);3118 3119/**3120 *	ata_cable_ignore	-	return ignored PATA cable.3121 *	@ap: port3122 *3123 *	Helper method for drivers which don't use cable type to limit3124 *	transfer mode.3125 */3126int ata_cable_ignore(struct ata_port *ap)3127{3128	return ATA_CBL_PATA_IGN;3129}3130EXPORT_SYMBOL_GPL(ata_cable_ignore);3131 3132/**3133 *	ata_cable_sata	-	return SATA cable type3134 *	@ap: port3135 *3136 *	Helper method for drivers which have SATA cables3137 */3138 3139int ata_cable_sata(struct ata_port *ap)3140{3141	return ATA_CBL_SATA;3142}3143EXPORT_SYMBOL_GPL(ata_cable_sata);3144 3145/**3146 *	sata_print_link_status - Print SATA link status3147 *	@link: SATA link to printk link status about3148 *3149 *	This function prints link speed and status of a SATA link.3150 *3151 *	LOCKING:3152 *	None.3153 */3154static void sata_print_link_status(struct ata_link *link)3155{3156	u32 sstatus, scontrol, tmp;3157 3158	if (sata_scr_read(link, SCR_STATUS, &sstatus))3159		return;3160	if (sata_scr_read(link, SCR_CONTROL, &scontrol))3161		return;3162 3163	if (ata_phys_link_online(link)) {3164		tmp = (sstatus >> 4) & 0xf;3165		ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n",3166			      sata_spd_string(tmp), sstatus, scontrol);3167	} else {3168		ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n",3169			      sstatus, scontrol);3170	}3171}3172 3173/**3174 *	ata_dev_pair		-	return other device on cable3175 *	@adev: device3176 *3177 *	Obtain the other device on the same cable, or if none is3178 *	present NULL is returned3179 */3180 3181struct ata_device *ata_dev_pair(struct ata_device *adev)3182{3183	struct ata_link *link = adev->link;3184	struct ata_device *pair = &link->device[1 - adev->devno];3185	if (!ata_dev_enabled(pair))3186		return NULL;3187	return pair;3188}3189EXPORT_SYMBOL_GPL(ata_dev_pair);3190 3191#ifdef CONFIG_ATA_ACPI3192/**3193 *	ata_timing_cycle2mode - find xfer mode for the specified cycle duration3194 *	@xfer_shift: ATA_SHIFT_* value for transfer type to examine.3195 *	@cycle: cycle duration in ns3196 *3197 *	Return matching xfer mode for @cycle.  The returned mode is of3198 *	the transfer type specified by @xfer_shift.  If @cycle is too3199 *	slow for @xfer_shift, 0xff is returned.  If @cycle is faster3200 *	than the fastest known mode, the fasted mode is returned.3201 *3202 *	LOCKING:3203 *	None.3204 *3205 *	RETURNS:3206 *	Matching xfer_mode, 0xff if no match found.3207 */3208u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)3209{3210	u8 base_mode = 0xff, last_mode = 0xff;3211	const struct ata_xfer_ent *ent;3212	const struct ata_timing *t;3213 3214	for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)3215		if (ent->shift == xfer_shift)3216			base_mode = ent->base;3217 3218	for (t = ata_timing_find_mode(base_mode);3219	     t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {3220		unsigned short this_cycle;3221 3222		switch (xfer_shift) {3223		case ATA_SHIFT_PIO:3224		case ATA_SHIFT_MWDMA:3225			this_cycle = t->cycle;3226			break;3227		case ATA_SHIFT_UDMA:3228			this_cycle = t->udma;3229			break;3230		default:3231			return 0xff;3232		}3233 3234		if (cycle > this_cycle)3235			break;3236 3237		last_mode = t->mode;3238	}3239 3240	return last_mode;3241}3242#endif3243 3244/**3245 *	ata_down_xfermask_limit - adjust dev xfer masks downward3246 *	@dev: Device to adjust xfer masks3247 *	@sel: ATA_DNXFER_* selector3248 *3249 *	Adjust xfer masks of @dev downward.  Note that this function3250 *	does not apply the change.  Invoking ata_set_mode() afterwards3251 *	will apply the limit.3252 *3253 *	LOCKING:3254 *	Inherited from caller.3255 *3256 *	RETURNS:3257 *	0 on success, negative errno on failure3258 */3259int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)3260{3261	char buf[32];3262	unsigned int orig_mask, xfer_mask;3263	unsigned int pio_mask, mwdma_mask, udma_mask;3264	int quiet, highbit;3265 3266	quiet = !!(sel & ATA_DNXFER_QUIET);3267	sel &= ~ATA_DNXFER_QUIET;3268 3269	xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,3270						  dev->mwdma_mask,3271						  dev->udma_mask);3272	ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);3273 3274	switch (sel) {3275	case ATA_DNXFER_PIO:3276		highbit = fls(pio_mask) - 1;3277		pio_mask &= ~(1 << highbit);3278		break;3279 3280	case ATA_DNXFER_DMA:3281		if (udma_mask) {3282			highbit = fls(udma_mask) - 1;3283			udma_mask &= ~(1 << highbit);3284			if (!udma_mask)3285				return -ENOENT;3286		} else if (mwdma_mask) {3287			highbit = fls(mwdma_mask) - 1;3288			mwdma_mask &= ~(1 << highbit);3289			if (!mwdma_mask)3290				return -ENOENT;3291		}3292		break;3293 3294	case ATA_DNXFER_40C:3295		udma_mask &= ATA_UDMA_MASK_40C;3296		break;3297 3298	case ATA_DNXFER_FORCE_PIO0:3299		pio_mask &= 1;3300		fallthrough;3301	case ATA_DNXFER_FORCE_PIO:3302		mwdma_mask = 0;3303		udma_mask = 0;3304		break;3305 3306	default:3307		BUG();3308	}3309 3310	xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);3311 3312	if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)3313		return -ENOENT;3314 3315	if (!quiet) {3316		if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))3317			snprintf(buf, sizeof(buf), "%s:%s",3318				 ata_mode_string(xfer_mask),3319				 ata_mode_string(xfer_mask & ATA_MASK_PIO));3320		else3321			snprintf(buf, sizeof(buf), "%s",3322				 ata_mode_string(xfer_mask));3323 3324		ata_dev_warn(dev, "limiting speed to %s\n", buf);3325	}3326 3327	ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,3328			    &dev->udma_mask);3329 3330	return 0;3331}3332 3333static int ata_dev_set_mode(struct ata_device *dev)3334{3335	struct ata_port *ap = dev->link->ap;3336	struct ata_eh_context *ehc = &dev->link->eh_context;3337	const bool nosetxfer = dev->quirks & ATA_QUIRK_NOSETXFER;3338	const char *dev_err_whine = "";3339	int ign_dev_err = 0;3340	unsigned int err_mask = 0;3341	int rc;3342 3343	dev->flags &= ~ATA_DFLAG_PIO;3344	if (dev->xfer_shift == ATA_SHIFT_PIO)3345		dev->flags |= ATA_DFLAG_PIO;3346 3347	if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id))3348		dev_err_whine = " (SET_XFERMODE skipped)";3349	else {3350		if (nosetxfer)3351			ata_dev_warn(dev,3352				     "NOSETXFER but PATA detected - can't "3353				     "skip SETXFER, might malfunction\n");3354		err_mask = ata_dev_set_xfermode(dev);3355	}3356 3357	if (err_mask & ~AC_ERR_DEV)3358		goto fail;3359 3360	/* revalidate */3361	ehc->i.flags |= ATA_EHI_POST_SETMODE;3362	rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);3363	ehc->i.flags &= ~ATA_EHI_POST_SETMODE;3364	if (rc)3365		return rc;3366 3367	if (dev->xfer_shift == ATA_SHIFT_PIO) {3368		/* Old CFA may refuse this command, which is just fine */3369		if (ata_id_is_cfa(dev->id))3370			ign_dev_err = 1;3371		/* Catch several broken garbage emulations plus some pre3372		   ATA devices */3373		if (ata_id_major_version(dev->id) == 0 &&3374					dev->pio_mode <= XFER_PIO_2)3375			ign_dev_err = 1;3376		/* Some very old devices and some bad newer ones fail3377		   any kind of SET_XFERMODE request but support PIO0-23378		   timings and no IORDY */3379		if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)3380			ign_dev_err = 1;3381	}3382	/* Early MWDMA devices do DMA but don't allow DMA mode setting.3383	   Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */3384	if (dev->xfer_shift == ATA_SHIFT_MWDMA &&3385	    dev->dma_mode == XFER_MW_DMA_0 &&3386	    (dev->id[63] >> 8) & 1)3387		ign_dev_err = 1;3388 3389	/* if the device is actually configured correctly, ignore dev err */3390	if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))3391		ign_dev_err = 1;3392 3393	if (err_mask & AC_ERR_DEV) {3394		if (!ign_dev_err)3395			goto fail;3396		else3397			dev_err_whine = " (device error ignored)";3398	}3399 3400	ata_dev_dbg(dev, "xfer_shift=%u, xfer_mode=0x%x\n",3401		    dev->xfer_shift, (int)dev->xfer_mode);3402 3403	if (!(ehc->i.flags & ATA_EHI_QUIET) ||3404	    ehc->i.flags & ATA_EHI_DID_HARDRESET)3405		ata_dev_info(dev, "configured for %s%s\n",3406			     ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),3407			     dev_err_whine);3408 3409	return 0;3410 3411 fail:3412	ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask);3413	return -EIO;3414}3415 3416/**3417 *	ata_do_set_mode - Program timings and issue SET FEATURES - XFER3418 *	@link: link on which timings will be programmed3419 *	@r_failed_dev: out parameter for failed device3420 *3421 *	Standard implementation of the function used to tune and set3422 *	ATA device disk transfer mode (PIO3, UDMA6, etc.).  If3423 *	ata_dev_set_mode() fails, pointer to the failing device is3424 *	returned in @r_failed_dev.3425 *3426 *	LOCKING:3427 *	PCI/etc. bus probe sem.3428 *3429 *	RETURNS:3430 *	0 on success, negative errno otherwise3431 */3432 3433int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)3434{3435	struct ata_port *ap = link->ap;3436	struct ata_device *dev;3437	int rc = 0, used_dma = 0, found = 0;3438 3439	/* step 1: calculate xfer_mask */3440	ata_for_each_dev(dev, link, ENABLED) {3441		unsigned int pio_mask, dma_mask;3442		unsigned int mode_mask;3443 3444		mode_mask = ATA_DMA_MASK_ATA;3445		if (dev->class == ATA_DEV_ATAPI)3446			mode_mask = ATA_DMA_MASK_ATAPI;3447		else if (ata_id_is_cfa(dev->id))3448			mode_mask = ATA_DMA_MASK_CFA;3449 3450		ata_dev_xfermask(dev);3451		ata_force_xfermask(dev);3452 3453		pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);3454 3455		if (libata_dma_mask & mode_mask)3456			dma_mask = ata_pack_xfermask(0, dev->mwdma_mask,3457						     dev->udma_mask);3458		else3459			dma_mask = 0;3460 3461		dev->pio_mode = ata_xfer_mask2mode(pio_mask);3462		dev->dma_mode = ata_xfer_mask2mode(dma_mask);3463 3464		found = 1;3465		if (ata_dma_enabled(dev))3466			used_dma = 1;3467	}3468	if (!found)3469		goto out;3470 3471	/* step 2: always set host PIO timings */3472	ata_for_each_dev(dev, link, ENABLED) {3473		if (dev->pio_mode == 0xff) {3474			ata_dev_warn(dev, "no PIO support\n");3475			rc = -EINVAL;3476			goto out;3477		}3478 3479		dev->xfer_mode = dev->pio_mode;3480		dev->xfer_shift = ATA_SHIFT_PIO;3481		if (ap->ops->set_piomode)3482			ap->ops->set_piomode(ap, dev);3483	}3484 3485	/* step 3: set host DMA timings */3486	ata_for_each_dev(dev, link, ENABLED) {3487		if (!ata_dma_enabled(dev))3488			continue;3489 3490		dev->xfer_mode = dev->dma_mode;3491		dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);3492		if (ap->ops->set_dmamode)3493			ap->ops->set_dmamode(ap, dev);3494	}3495 3496	/* step 4: update devices' xfer mode */3497	ata_for_each_dev(dev, link, ENABLED) {3498		rc = ata_dev_set_mode(dev);3499		if (rc)3500			goto out;3501	}3502 3503	/* Record simplex status. If we selected DMA then the other3504	 * host channels are not permitted to do so.3505	 */3506	if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))3507		ap->host->simplex_claimed = ap;3508 3509 out:3510	if (rc)3511		*r_failed_dev = dev;3512	return rc;3513}3514EXPORT_SYMBOL_GPL(ata_do_set_mode);3515 3516/**3517 *	ata_wait_ready - wait for link to become ready3518 *	@link: link to be waited on3519 *	@deadline: deadline jiffies for the operation3520 *	@check_ready: callback to check link readiness3521 *3522 *	Wait for @link to become ready.  @check_ready should return3523 *	positive number if @link is ready, 0 if it isn't, -ENODEV if3524 *	link doesn't seem to be occupied, other errno for other error3525 *	conditions.3526 *3527 *	Transient -ENODEV conditions are allowed for3528 *	ATA_TMOUT_FF_WAIT.3529 *3530 *	LOCKING:3531 *	EH context.3532 *3533 *	RETURNS:3534 *	0 if @link is ready before @deadline; otherwise, -errno.3535 */3536int ata_wait_ready(struct ata_link *link, unsigned long deadline,3537		   int (*check_ready)(struct ata_link *link))3538{3539	unsigned long start = jiffies;3540	unsigned long nodev_deadline;3541	int warned = 0;3542 3543	/* choose which 0xff timeout to use, read comment in libata.h */3544	if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN)3545		nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG);3546	else3547		nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);3548 3549	/* Slave readiness can't be tested separately from master.  On3550	 * M/S emulation configuration, this function should be called3551	 * only on the master and it will handle both master and slave.3552	 */3553	WARN_ON(link == link->ap->slave_link);3554 3555	if (time_after(nodev_deadline, deadline))3556		nodev_deadline = deadline;3557 3558	while (1) {3559		unsigned long now = jiffies;3560		int ready, tmp;3561 3562		ready = tmp = check_ready(link);3563		if (ready > 0)3564			return 0;3565 3566		/*3567		 * -ENODEV could be transient.  Ignore -ENODEV if link3568		 * is online.  Also, some SATA devices take a long3569		 * time to clear 0xff after reset.  Wait for3570		 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't3571		 * offline.3572		 *3573		 * Note that some PATA controllers (pata_ali) explode3574		 * if status register is read more than once when3575		 * there's no device attached.3576		 */3577		if (ready == -ENODEV) {3578			if (ata_link_online(link))3579				ready = 0;3580			else if ((link->ap->flags & ATA_FLAG_SATA) &&3581				 !ata_link_offline(link) &&3582				 time_before(now, nodev_deadline))3583				ready = 0;3584		}3585 3586		if (ready)3587			return ready;3588		if (time_after(now, deadline))3589			return -EBUSY;3590 3591		if (!warned && time_after(now, start + 5 * HZ) &&3592		    (deadline - now > 3 * HZ)) {3593			ata_link_warn(link,3594				"link is slow to respond, please be patient "3595				"(ready=%d)\n", tmp);3596			warned = 1;3597		}3598 3599		ata_msleep(link->ap, 50);3600	}3601}3602 3603/**3604 *	ata_wait_after_reset - wait for link to become ready after reset3605 *	@link: link to be waited on3606 *	@deadline: deadline jiffies for the operation3607 *	@check_ready: callback to check link readiness3608 *3609 *	Wait for @link to become ready after reset.3610 *3611 *	LOCKING:3612 *	EH context.3613 *3614 *	RETURNS:3615 *	0 if @link is ready before @deadline; otherwise, -errno.3616 */3617int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,3618				int (*check_ready)(struct ata_link *link))3619{3620	ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);3621 3622	return ata_wait_ready(link, deadline, check_ready);3623}3624EXPORT_SYMBOL_GPL(ata_wait_after_reset);3625 3626/**3627 *	ata_std_prereset - prepare for reset3628 *	@link: ATA link to be reset3629 *	@deadline: deadline jiffies for the operation3630 *3631 *	@link is about to be reset.  Initialize it.  Failure from3632 *	prereset makes libata abort whole reset sequence and give up3633 *	that port, so prereset should be best-effort.  It does its3634 *	best to prepare for reset sequence but if things go wrong, it3635 *	should just whine, not fail.3636 *3637 *	LOCKING:3638 *	Kernel thread context (may sleep)3639 *3640 *	RETURNS:3641 *	Always 0.3642 */3643int ata_std_prereset(struct ata_link *link, unsigned long deadline)3644{3645	struct ata_port *ap = link->ap;3646	struct ata_eh_context *ehc = &link->eh_context;3647	const unsigned int *timing = sata_ehc_deb_timing(ehc);3648	int rc;3649 3650	/* if we're about to do hardreset, nothing more to do */3651	if (ehc->i.action & ATA_EH_HARDRESET)3652		return 0;3653 3654	/* if SATA, resume link */3655	if (ap->flags & ATA_FLAG_SATA) {3656		rc = sata_link_resume(link, timing, deadline);3657		/* whine about phy resume failure but proceed */3658		if (rc && rc != -EOPNOTSUPP)3659			ata_link_warn(link,3660				      "failed to resume link for reset (errno=%d)\n",3661				      rc);3662	}3663 3664	/* no point in trying softreset on offline link */3665	if (ata_phys_link_offline(link))3666		ehc->i.action &= ~ATA_EH_SOFTRESET;3667 3668	return 0;3669}3670EXPORT_SYMBOL_GPL(ata_std_prereset);3671 3672/**3673 *	ata_std_postreset - standard postreset callback3674 *	@link: the target ata_link3675 *	@classes: classes of attached devices3676 *3677 *	This function is invoked after a successful reset.  Note that3678 *	the device might have been reset more than once using3679 *	different reset methods before postreset is invoked.3680 *3681 *	LOCKING:3682 *	Kernel thread context (may sleep)3683 */3684void ata_std_postreset(struct ata_link *link, unsigned int *classes)3685{3686	u32 serror;3687 3688	/* reset complete, clear SError */3689	if (!sata_scr_read(link, SCR_ERROR, &serror))3690		sata_scr_write(link, SCR_ERROR, serror);3691 3692	/* print link status */3693	sata_print_link_status(link);3694}3695EXPORT_SYMBOL_GPL(ata_std_postreset);3696 3697/**3698 *	ata_dev_same_device - Determine whether new ID matches configured device3699 *	@dev: device to compare against3700 *	@new_class: class of the new device3701 *	@new_id: IDENTIFY page of the new device3702 *3703 *	Compare @new_class and @new_id against @dev and determine3704 *	whether @dev is the device indicated by @new_class and3705 *	@new_id.3706 *3707 *	LOCKING:3708 *	None.3709 *3710 *	RETURNS:3711 *	1 if @dev matches @new_class and @new_id, 0 otherwise.3712 */3713static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,3714			       const u16 *new_id)3715{3716	const u16 *old_id = dev->id;3717	unsigned char model[2][ATA_ID_PROD_LEN + 1];3718	unsigned char serial[2][ATA_ID_SERNO_LEN + 1];3719 3720	if (dev->class != new_class) {3721		ata_dev_info(dev, "class mismatch %d != %d\n",3722			     dev->class, new_class);3723		return 0;3724	}3725 3726	ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));3727	ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));3728	ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));3729	ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));3730 3731	if (strcmp(model[0], model[1])) {3732		ata_dev_info(dev, "model number mismatch '%s' != '%s'\n",3733			     model[0], model[1]);3734		return 0;3735	}3736 3737	if (strcmp(serial[0], serial[1])) {3738		ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n",3739			     serial[0], serial[1]);3740		return 0;3741	}3742 3743	return 1;3744}3745 3746/**3747 *	ata_dev_reread_id - Re-read IDENTIFY data3748 *	@dev: target ATA device3749 *	@readid_flags: read ID flags3750 *3751 *	Re-read IDENTIFY page and make sure @dev is still attached to3752 *	the port.3753 *3754 *	LOCKING:3755 *	Kernel thread context (may sleep)3756 *3757 *	RETURNS:3758 *	0 on success, negative errno otherwise3759 */3760int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)3761{3762	unsigned int class = dev->class;3763	u16 *id = (void *)dev->sector_buf;3764	int rc;3765 3766	/* read ID data */3767	rc = ata_dev_read_id(dev, &class, readid_flags, id);3768	if (rc)3769		return rc;3770 3771	/* is the device still there? */3772	if (!ata_dev_same_device(dev, class, id))3773		return -ENODEV;3774 3775	memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);3776	return 0;3777}3778 3779/**3780 *	ata_dev_revalidate - Revalidate ATA device3781 *	@dev: device to revalidate3782 *	@new_class: new class code3783 *	@readid_flags: read ID flags3784 *3785 *	Re-read IDENTIFY page, make sure @dev is still attached to the3786 *	port and reconfigure it according to the new IDENTIFY page.3787 *3788 *	LOCKING:3789 *	Kernel thread context (may sleep)3790 *3791 *	RETURNS:3792 *	0 on success, negative errno otherwise3793 */3794int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,3795		       unsigned int readid_flags)3796{3797	u64 n_sectors = dev->n_sectors;3798	u64 n_native_sectors = dev->n_native_sectors;3799	int rc;3800 3801	if (!ata_dev_enabled(dev))3802		return -ENODEV;3803 3804	/* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */3805	if (ata_class_enabled(new_class) && new_class == ATA_DEV_PMP) {3806		ata_dev_info(dev, "class mismatch %u != %u\n",3807			     dev->class, new_class);3808		rc = -ENODEV;3809		goto fail;3810	}3811 3812	/* re-read ID */3813	rc = ata_dev_reread_id(dev, readid_flags);3814	if (rc)3815		goto fail;3816 3817	/* configure device according to the new ID */3818	rc = ata_dev_configure(dev);3819	if (rc)3820		goto fail;3821 3822	/* verify n_sectors hasn't changed */3823	if (dev->class != ATA_DEV_ATA || !n_sectors ||3824	    dev->n_sectors == n_sectors)3825		return 0;3826 3827	/* n_sectors has changed */3828	ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n",3829		     (unsigned long long)n_sectors,3830		     (unsigned long long)dev->n_sectors);3831 3832	/*3833	 * Something could have caused HPA to be unlocked3834	 * involuntarily.  If n_native_sectors hasn't changed and the3835	 * new size matches it, keep the device.3836	 */3837	if (dev->n_native_sectors == n_native_sectors &&3838	    dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) {3839		ata_dev_warn(dev,3840			     "new n_sectors matches native, probably "3841			     "late HPA unlock, n_sectors updated\n");3842		/* use the larger n_sectors */3843		return 0;3844	}3845 3846	/*3847	 * Some BIOSes boot w/o HPA but resume w/ HPA locked.  Try3848	 * unlocking HPA in those cases.3849	 *3850	 * https://bugzilla.kernel.org/show_bug.cgi?id=153963851	 */3852	if (dev->n_native_sectors == n_native_sectors &&3853	    dev->n_sectors < n_sectors && n_sectors == n_native_sectors &&3854	    !(dev->quirks & ATA_QUIRK_BROKEN_HPA)) {3855		ata_dev_warn(dev,3856			     "old n_sectors matches native, probably "3857			     "late HPA lock, will try to unlock HPA\n");3858		/* try unlocking HPA */3859		dev->flags |= ATA_DFLAG_UNLOCK_HPA;3860		rc = -EIO;3861	} else3862		rc = -ENODEV;3863 3864	/* restore original n_[native_]sectors and fail */3865	dev->n_native_sectors = n_native_sectors;3866	dev->n_sectors = n_sectors;3867 fail:3868	ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc);3869	return rc;3870}3871 3872static const char * const ata_quirk_names[] = {3873	[__ATA_QUIRK_DIAGNOSTIC]	= "diagnostic",3874	[__ATA_QUIRK_NODMA]		= "nodma",3875	[__ATA_QUIRK_NONCQ]		= "noncq",3876	[__ATA_QUIRK_MAX_SEC_128]	= "maxsec128",3877	[__ATA_QUIRK_BROKEN_HPA]	= "brokenhpa",3878	[__ATA_QUIRK_DISABLE]		= "disable",3879	[__ATA_QUIRK_HPA_SIZE]		= "hpasize",3880	[__ATA_QUIRK_IVB]		= "ivb",3881	[__ATA_QUIRK_STUCK_ERR]		= "stuckerr",3882	[__ATA_QUIRK_BRIDGE_OK]		= "bridgeok",3883	[__ATA_QUIRK_ATAPI_MOD16_DMA]	= "atapimod16dma",3884	[__ATA_QUIRK_FIRMWARE_WARN]	= "firmwarewarn",3885	[__ATA_QUIRK_1_5_GBPS]		= "1.5gbps",3886	[__ATA_QUIRK_NOSETXFER]		= "nosetxfer",3887	[__ATA_QUIRK_BROKEN_FPDMA_AA]	= "brokenfpdmaaa",3888	[__ATA_QUIRK_DUMP_ID]		= "dumpid",3889	[__ATA_QUIRK_MAX_SEC_LBA48]	= "maxseclba48",3890	[__ATA_QUIRK_ATAPI_DMADIR]	= "atapidmadir",3891	[__ATA_QUIRK_NO_NCQ_TRIM]	= "noncqtrim",3892	[__ATA_QUIRK_NOLPM]		= "nolpm",3893	[__ATA_QUIRK_WD_BROKEN_LPM]	= "wdbrokenlpm",3894	[__ATA_QUIRK_ZERO_AFTER_TRIM]	= "zeroaftertrim",3895	[__ATA_QUIRK_NO_DMA_LOG]	= "nodmalog",3896	[__ATA_QUIRK_NOTRIM]		= "notrim",3897	[__ATA_QUIRK_MAX_SEC_1024]	= "maxsec1024",3898	[__ATA_QUIRK_MAX_TRIM_128M]	= "maxtrim128m",3899	[__ATA_QUIRK_NO_NCQ_ON_ATI]	= "noncqonati",3900	[__ATA_QUIRK_NO_ID_DEV_LOG]	= "noiddevlog",3901	[__ATA_QUIRK_NO_LOG_DIR]	= "nologdir",3902	[__ATA_QUIRK_NO_FUA]		= "nofua",3903};3904 3905static void ata_dev_print_quirks(const struct ata_device *dev,3906				 const char *model, const char *rev,3907				 unsigned int quirks)3908{3909	struct ata_eh_context *ehc = &dev->link->eh_context;3910	int n = 0, i;3911	size_t sz;3912	char *str;3913 3914	if (!ata_dev_print_info(dev) || ehc->i.flags & ATA_EHI_DID_PRINT_QUIRKS)3915		return;3916 3917	ehc->i.flags |= ATA_EHI_DID_PRINT_QUIRKS;3918 3919	if (!quirks)3920		return;3921 3922	sz = 64 + ARRAY_SIZE(ata_quirk_names) * 16;3923	str = kmalloc(sz, GFP_KERNEL);3924	if (!str)3925		return;3926 3927	n = snprintf(str, sz, "Model '%s', rev '%s', applying quirks:",3928		     model, rev);3929 3930	for (i = 0; i < ARRAY_SIZE(ata_quirk_names); i++) {3931		if (quirks & (1U << i))3932			n += snprintf(str + n, sz - n,3933				      " %s", ata_quirk_names[i]);3934	}3935 3936	ata_dev_warn(dev, "%s\n", str);3937 3938	kfree(str);3939}3940 3941struct ata_dev_quirks_entry {3942	const char *model_num;3943	const char *model_rev;3944	unsigned int quirks;3945};3946 3947static const struct ata_dev_quirks_entry __ata_dev_quirks[] = {3948	/* Devices with DMA related problems under Linux */3949	{ "WDC AC11000H",	NULL,		ATA_QUIRK_NODMA },3950	{ "WDC AC22100H",	NULL,		ATA_QUIRK_NODMA },3951	{ "WDC AC32500H",	NULL,		ATA_QUIRK_NODMA },3952	{ "WDC AC33100H",	NULL,		ATA_QUIRK_NODMA },3953	{ "WDC AC31600H",	NULL,		ATA_QUIRK_NODMA },3954	{ "WDC AC32100H",	"24.09P07",	ATA_QUIRK_NODMA },3955	{ "WDC AC23200L",	"21.10N21",	ATA_QUIRK_NODMA },3956	{ "Compaq CRD-8241B",	NULL,		ATA_QUIRK_NODMA },3957	{ "CRD-8400B",		NULL,		ATA_QUIRK_NODMA },3958	{ "CRD-848[02]B",	NULL,		ATA_QUIRK_NODMA },3959	{ "CRD-84",		NULL,		ATA_QUIRK_NODMA },3960	{ "SanDisk SDP3B",	NULL,		ATA_QUIRK_NODMA },3961	{ "SanDisk SDP3B-64",	NULL,		ATA_QUIRK_NODMA },3962	{ "SANYO CD-ROM CRD",	NULL,		ATA_QUIRK_NODMA },3963	{ "HITACHI CDR-8",	NULL,		ATA_QUIRK_NODMA },3964	{ "HITACHI CDR-8[34]35", NULL,		ATA_QUIRK_NODMA },3965	{ "Toshiba CD-ROM XM-6202B", NULL,	ATA_QUIRK_NODMA },3966	{ "TOSHIBA CD-ROM XM-1702BC", NULL,	ATA_QUIRK_NODMA },3967	{ "CD-532E-A",		NULL,		ATA_QUIRK_NODMA },3968	{ "E-IDE CD-ROM CR-840", NULL,		ATA_QUIRK_NODMA },3969	{ "CD-ROM Drive/F5A",	NULL,		ATA_QUIRK_NODMA },3970	{ "WPI CDD-820",	NULL,		ATA_QUIRK_NODMA },3971	{ "SAMSUNG CD-ROM SC-148C", NULL,	ATA_QUIRK_NODMA },3972	{ "SAMSUNG CD-ROM SC",	NULL,		ATA_QUIRK_NODMA },3973	{ "ATAPI CD-ROM DRIVE 40X MAXIMUM", NULL, ATA_QUIRK_NODMA },3974	{ "_NEC DV5800A",	NULL,		ATA_QUIRK_NODMA },3975	{ "SAMSUNG CD-ROM SN-124", "N001",	ATA_QUIRK_NODMA },3976	{ "Seagate STT20000A", NULL,		ATA_QUIRK_NODMA },3977	{ " 2GB ATA Flash Disk", "ADMA428M",	ATA_QUIRK_NODMA },3978	{ "VRFDFC22048UCHC-TE*", NULL,		ATA_QUIRK_NODMA },3979	/* Odd clown on sil3726/4726 PMPs */3980	{ "Config  Disk",	NULL,		ATA_QUIRK_DISABLE },3981	/* Similar story with ASMedia 1092 */3982	{ "ASMT109x- Config",	NULL,		ATA_QUIRK_DISABLE },3983 3984	/* Weird ATAPI devices */3985	{ "TORiSAN DVD-ROM DRD-N216", NULL,	ATA_QUIRK_MAX_SEC_128 },3986	{ "QUANTUM DAT    DAT72-000", NULL,	ATA_QUIRK_ATAPI_MOD16_DMA },3987	{ "Slimtype DVD A  DS8A8SH", NULL,	ATA_QUIRK_MAX_SEC_LBA48 },3988	{ "Slimtype DVD A  DS8A9SH", NULL,	ATA_QUIRK_MAX_SEC_LBA48 },3989 3990	/*3991	 * Causes silent data corruption with higher max sects.3992	 * http://lkml.kernel.org/g/x49wpy40ysk.fsf@segfault.boston.devel.redhat.com3993	 */3994	{ "ST380013AS",		"3.20",		ATA_QUIRK_MAX_SEC_1024 },3995 3996	/*3997	 * These devices time out with higher max sects.3998	 * https://bugzilla.kernel.org/show_bug.cgi?id=1216713999	 */4000	{ "LITEON CX1-JB*-HP",	NULL,		ATA_QUIRK_MAX_SEC_1024 },4001	{ "LITEON EP1-*",	NULL,		ATA_QUIRK_MAX_SEC_1024 },4002 4003	/* Devices we expect to fail diagnostics */4004 4005	/* Devices where NCQ should be avoided */4006	/* NCQ is slow */4007	{ "WDC WD740ADFD-00",	NULL,		ATA_QUIRK_NONCQ },4008	{ "WDC WD740ADFD-00NLR1", NULL,		ATA_QUIRK_NONCQ },4009	/* http://thread.gmane.org/gmane.linux.ide/14907 */4010	{ "FUJITSU MHT2060BH",	NULL,		ATA_QUIRK_NONCQ },4011	/* NCQ is broken */4012	{ "Maxtor *",		"BANC*",	ATA_QUIRK_NONCQ },4013	{ "Maxtor 7V300F0",	"VA111630",	ATA_QUIRK_NONCQ },4014	{ "ST380817AS",		"3.42",		ATA_QUIRK_NONCQ },4015	{ "ST3160023AS",	"3.42",		ATA_QUIRK_NONCQ },4016	{ "OCZ CORE_SSD",	"02.10104",	ATA_QUIRK_NONCQ },4017 4018	/* Seagate NCQ + FLUSH CACHE firmware bug */4019	{ "ST31500341AS",	"SD1[5-9]",	ATA_QUIRK_NONCQ |4020						ATA_QUIRK_FIRMWARE_WARN },4021 4022	{ "ST31000333AS",	"SD1[5-9]",	ATA_QUIRK_NONCQ |4023						ATA_QUIRK_FIRMWARE_WARN },4024 4025	{ "ST3640[36]23AS",	"SD1[5-9]",	ATA_QUIRK_NONCQ |4026						ATA_QUIRK_FIRMWARE_WARN },4027 4028	{ "ST3320[68]13AS",	"SD1[5-9]",	ATA_QUIRK_NONCQ |4029						ATA_QUIRK_FIRMWARE_WARN },4030 4031	/* drives which fail FPDMA_AA activation (some may freeze afterwards)4032	   the ST disks also have LPM issues */4033	{ "ST1000LM024 HN-M101MBB", NULL,	ATA_QUIRK_BROKEN_FPDMA_AA |4034						ATA_QUIRK_NOLPM },4035	{ "VB0250EAVER",	"HPG7",		ATA_QUIRK_BROKEN_FPDMA_AA },4036 4037	/* Blacklist entries taken from Silicon Image 3124/31324038	   Windows driver .inf file - also several Linux problem reports */4039	{ "HTS541060G9SA00",    "MB3OC60D",     ATA_QUIRK_NONCQ },4040	{ "HTS541080G9SA00",    "MB4OC60D",     ATA_QUIRK_NONCQ },4041	{ "HTS541010G9SA00",    "MBZOC60D",     ATA_QUIRK_NONCQ },4042 4043	/* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */4044	{ "C300-CTFDDAC128MAG",	"0001",		ATA_QUIRK_NONCQ },4045 4046	/* Sandisk SD7/8/9s lock up hard on large trims */4047	{ "SanDisk SD[789]*",	NULL,		ATA_QUIRK_MAX_TRIM_128M },4048 4049	/* devices which puke on READ_NATIVE_MAX */4050	{ "HDS724040KLSA80",	"KFAOA20N",	ATA_QUIRK_BROKEN_HPA },4051	{ "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_QUIRK_BROKEN_HPA },4052	{ "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_QUIRK_BROKEN_HPA },4053	{ "MAXTOR 6L080L4",	"A93.0500",	ATA_QUIRK_BROKEN_HPA },4054 4055	/* this one allows HPA unlocking but fails IOs on the area */4056	{ "OCZ-VERTEX",		    "1.30",	ATA_QUIRK_BROKEN_HPA },4057 4058	/* Devices which report 1 sector over size HPA */4059	{ "ST340823A",		NULL,		ATA_QUIRK_HPA_SIZE },4060	{ "ST320413A",		NULL,		ATA_QUIRK_HPA_SIZE },4061	{ "ST310211A",		NULL,		ATA_QUIRK_HPA_SIZE },4062 4063	/* Devices which get the IVB wrong */4064	{ "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_QUIRK_IVB },4065	/* Maybe we should just add all TSSTcorp devices... */4066	{ "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]",  ATA_QUIRK_IVB },4067 4068	/* Devices that do not need bridging limits applied */4069	{ "MTRON MSP-SATA*",		NULL,	ATA_QUIRK_BRIDGE_OK },4070	{ "BUFFALO HD-QSU2/R5",		NULL,	ATA_QUIRK_BRIDGE_OK },4071 4072	/* Devices which aren't very happy with higher link speeds */4073	{ "WD My Book",			NULL,	ATA_QUIRK_1_5_GBPS },4074	{ "Seagate FreeAgent GoFlex",	NULL,	ATA_QUIRK_1_5_GBPS },4075 4076	/*4077	 * Devices which choke on SETXFER.  Applies only if both the4078	 * device and controller are SATA.4079	 */4080	{ "PIONEER DVD-RW  DVRTD08",	NULL,	ATA_QUIRK_NOSETXFER },4081	{ "PIONEER DVD-RW  DVRTD08A",	NULL,	ATA_QUIRK_NOSETXFER },4082	{ "PIONEER DVD-RW  DVR-215",	NULL,	ATA_QUIRK_NOSETXFER },4083	{ "PIONEER DVD-RW  DVR-212D",	NULL,	ATA_QUIRK_NOSETXFER },4084	{ "PIONEER DVD-RW  DVR-216D",	NULL,	ATA_QUIRK_NOSETXFER },4085 4086	/* These specific Pioneer models have LPM issues */4087	{ "PIONEER BD-RW   BDR-207M",	NULL,	ATA_QUIRK_NOLPM },4088	{ "PIONEER BD-RW   BDR-205",	NULL,	ATA_QUIRK_NOLPM },4089 4090	/* Crucial devices with broken LPM support */4091	{ "CT*0BX*00SSD1",		NULL,	ATA_QUIRK_NOLPM },4092 4093	/* 512GB MX100 with MU01 firmware has both queued TRIM and LPM issues */4094	{ "Crucial_CT512MX100*",	"MU01",	ATA_QUIRK_NO_NCQ_TRIM |4095						ATA_QUIRK_ZERO_AFTER_TRIM |4096						ATA_QUIRK_NOLPM },4097	/* 512GB MX100 with newer firmware has only LPM issues */4098	{ "Crucial_CT512MX100*",	NULL,	ATA_QUIRK_ZERO_AFTER_TRIM |4099						ATA_QUIRK_NOLPM },4100 4101	/* 480GB+ M500 SSDs have both queued TRIM and LPM issues */4102	{ "Crucial_CT480M500*",		NULL,	ATA_QUIRK_NO_NCQ_TRIM |4103						ATA_QUIRK_ZERO_AFTER_TRIM |4104						ATA_QUIRK_NOLPM },4105	{ "Crucial_CT960M500*",		NULL,	ATA_QUIRK_NO_NCQ_TRIM |4106						ATA_QUIRK_ZERO_AFTER_TRIM |4107						ATA_QUIRK_NOLPM },4108 4109	/* AMD Radeon devices with broken LPM support */4110	{ "R3SL240G",			NULL,	ATA_QUIRK_NOLPM },4111 4112	/* Apacer models with LPM issues */4113	{ "Apacer AS340*",		NULL,	ATA_QUIRK_NOLPM },4114 4115	/* These specific Samsung models/firmware-revs do not handle LPM well */4116	{ "SAMSUNG MZMPC128HBFU-000MV", "CXM14M1Q", ATA_QUIRK_NOLPM },4117	{ "SAMSUNG SSD PM830 mSATA *",  "CXM13D1Q", ATA_QUIRK_NOLPM },4118	{ "SAMSUNG MZ7TD256HAFV-000L9", NULL,       ATA_QUIRK_NOLPM },4119	{ "SAMSUNG MZ7TE512HMHP-000L1", "EXT06L0Q", ATA_QUIRK_NOLPM },4120 4121	/* devices that don't properly handle queued TRIM commands */4122	{ "Micron_M500IT_*",		"MU01",	ATA_QUIRK_NO_NCQ_TRIM |4123						ATA_QUIRK_ZERO_AFTER_TRIM },4124	{ "Micron_M500_*",		NULL,	ATA_QUIRK_NO_NCQ_TRIM |4125						ATA_QUIRK_ZERO_AFTER_TRIM },4126	{ "Micron_M5[15]0_*",		"MU01",	ATA_QUIRK_NO_NCQ_TRIM |4127						ATA_QUIRK_ZERO_AFTER_TRIM },4128	{ "Micron_1100_*",		NULL,	ATA_QUIRK_NO_NCQ_TRIM |4129						ATA_QUIRK_ZERO_AFTER_TRIM, },4130	{ "Crucial_CT*M500*",		NULL,	ATA_QUIRK_NO_NCQ_TRIM |4131						ATA_QUIRK_ZERO_AFTER_TRIM },4132	{ "Crucial_CT*M550*",		"MU01",	ATA_QUIRK_NO_NCQ_TRIM |4133						ATA_QUIRK_ZERO_AFTER_TRIM },4134	{ "Crucial_CT*MX100*",		"MU01",	ATA_QUIRK_NO_NCQ_TRIM |4135						ATA_QUIRK_ZERO_AFTER_TRIM },4136	{ "Samsung SSD 840 EVO*",	NULL,	ATA_QUIRK_NO_NCQ_TRIM |4137						ATA_QUIRK_NO_DMA_LOG |4138						ATA_QUIRK_ZERO_AFTER_TRIM },4139	{ "Samsung SSD 840*",		NULL,	ATA_QUIRK_NO_NCQ_TRIM |4140						ATA_QUIRK_ZERO_AFTER_TRIM },4141	{ "Samsung SSD 850*",		NULL,	ATA_QUIRK_NO_NCQ_TRIM |4142						ATA_QUIRK_ZERO_AFTER_TRIM },4143	{ "Samsung SSD 860*",		NULL,	ATA_QUIRK_NO_NCQ_TRIM |4144						ATA_QUIRK_ZERO_AFTER_TRIM |4145						ATA_QUIRK_NO_NCQ_ON_ATI },4146	{ "Samsung SSD 870*",		NULL,	ATA_QUIRK_NO_NCQ_TRIM |4147						ATA_QUIRK_ZERO_AFTER_TRIM |4148						ATA_QUIRK_NO_NCQ_ON_ATI },4149	{ "SAMSUNG*MZ7LH*",		NULL,	ATA_QUIRK_NO_NCQ_TRIM |4150						ATA_QUIRK_ZERO_AFTER_TRIM |4151						ATA_QUIRK_NO_NCQ_ON_ATI, },4152	{ "FCCT*M500*",			NULL,	ATA_QUIRK_NO_NCQ_TRIM |4153						ATA_QUIRK_ZERO_AFTER_TRIM },4154 4155	/* devices that don't properly handle TRIM commands */4156	{ "SuperSSpeed S238*",		NULL,	ATA_QUIRK_NOTRIM },4157	{ "M88V29*",			NULL,	ATA_QUIRK_NOTRIM },4158 4159	/*4160	 * As defined, the DRAT (Deterministic Read After Trim) and RZAT4161	 * (Return Zero After Trim) flags in the ATA Command Set are4162	 * unreliable in the sense that they only define what happens if4163	 * the device successfully executed the DSM TRIM command. TRIM4164	 * is only advisory, however, and the device is free to silently4165	 * ignore all or parts of the request.4166	 *4167	 * Whitelist drives that are known to reliably return zeroes4168	 * after TRIM.4169	 */4170 4171	/*4172	 * The intel 510 drive has buggy DRAT/RZAT. Explicitly exclude4173	 * that model before whitelisting all other intel SSDs.4174	 */4175	{ "INTEL*SSDSC2MH*",		NULL,	0 },4176 4177	{ "Micron*",			NULL,	ATA_QUIRK_ZERO_AFTER_TRIM },4178	{ "Crucial*",			NULL,	ATA_QUIRK_ZERO_AFTER_TRIM },4179	{ "INTEL*SSD*",			NULL,	ATA_QUIRK_ZERO_AFTER_TRIM },4180	{ "SSD*INTEL*",			NULL,	ATA_QUIRK_ZERO_AFTER_TRIM },4181	{ "Samsung*SSD*",		NULL,	ATA_QUIRK_ZERO_AFTER_TRIM },4182	{ "SAMSUNG*SSD*",		NULL,	ATA_QUIRK_ZERO_AFTER_TRIM },4183	{ "SAMSUNG*MZ7KM*",		NULL,	ATA_QUIRK_ZERO_AFTER_TRIM },4184	{ "ST[1248][0248]0[FH]*",	NULL,	ATA_QUIRK_ZERO_AFTER_TRIM },4185 4186	/*4187	 * Some WD SATA-I drives spin up and down erratically when the link4188	 * is put into the slumber mode.  We don't have full list of the4189	 * affected devices.  Disable LPM if the device matches one of the4190	 * known prefixes and is SATA-1.  As a side effect LPM partial is4191	 * lost too.4192	 *4193	 * https://bugzilla.kernel.org/show_bug.cgi?id=572114194	 */4195	{ "WDC WD800JD-*",		NULL,	ATA_QUIRK_WD_BROKEN_LPM },4196	{ "WDC WD1200JD-*",		NULL,	ATA_QUIRK_WD_BROKEN_LPM },4197	{ "WDC WD1600JD-*",		NULL,	ATA_QUIRK_WD_BROKEN_LPM },4198	{ "WDC WD2000JD-*",		NULL,	ATA_QUIRK_WD_BROKEN_LPM },4199	{ "WDC WD2500JD-*",		NULL,	ATA_QUIRK_WD_BROKEN_LPM },4200	{ "WDC WD3000JD-*",		NULL,	ATA_QUIRK_WD_BROKEN_LPM },4201	{ "WDC WD3200JD-*",		NULL,	ATA_QUIRK_WD_BROKEN_LPM },4202 4203	/*4204	 * This sata dom device goes on a walkabout when the ATA_LOG_DIRECTORY4205	 * log page is accessed. Ensure we never ask for this log page with4206	 * these devices.4207	 */4208	{ "SATADOM-ML 3ME",		NULL,	ATA_QUIRK_NO_LOG_DIR },4209 4210	/* Buggy FUA */4211	{ "Maxtor",		"BANC1G10",	ATA_QUIRK_NO_FUA },4212	{ "WDC*WD2500J*",	NULL,		ATA_QUIRK_NO_FUA },4213	{ "OCZ-VERTEX*",	NULL,		ATA_QUIRK_NO_FUA },4214	{ "INTEL*SSDSC2CT*",	NULL,		ATA_QUIRK_NO_FUA },4215 4216	/* End Marker */4217	{ }4218};4219 4220static unsigned int ata_dev_quirks(const struct ata_device *dev)4221{4222	unsigned char model_num[ATA_ID_PROD_LEN + 1];4223	unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];4224	const struct ata_dev_quirks_entry *ad = __ata_dev_quirks;4225 4226	/* dev->quirks is an unsigned int. */4227	BUILD_BUG_ON(__ATA_QUIRK_MAX > 32);4228 4229	ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));4230	ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));4231 4232	while (ad->model_num) {4233		if (glob_match(ad->model_num, model_num) &&4234		    (!ad->model_rev || glob_match(ad->model_rev, model_rev))) {4235			ata_dev_print_quirks(dev, model_num, model_rev,4236					     ad->quirks);4237			return ad->quirks;4238		}4239		ad++;4240	}4241	return 0;4242}4243 4244static bool ata_dev_nodma(const struct ata_device *dev)4245{4246	/*4247	 * We do not support polling DMA. Deny DMA for those ATAPI devices4248	 * with CDB-intr (and use PIO) if the LLDD handles only interrupts in4249	 * the HSM_ST_LAST state.4250	 */4251	if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&4252	    (dev->flags & ATA_DFLAG_CDB_INTR))4253		return true;4254	return dev->quirks & ATA_QUIRK_NODMA;4255}4256 4257/**4258 *	ata_is_40wire		-	check drive side detection4259 *	@dev: device4260 *4261 *	Perform drive side detection decoding, allowing for device vendors4262 *	who can't follow the documentation.4263 */4264 4265static int ata_is_40wire(struct ata_device *dev)4266{4267	if (dev->quirks & ATA_QUIRK_IVB)4268		return ata_drive_40wire_relaxed(dev->id);4269	return ata_drive_40wire(dev->id);4270}4271 4272/**4273 *	cable_is_40wire		-	40/80/SATA decider4274 *	@ap: port to consider4275 *4276 *	This function encapsulates the policy for speed management4277 *	in one place. At the moment we don't cache the result but4278 *	there is a good case for setting ap->cbl to the result when4279 *	we are called with unknown cables (and figuring out if it4280 *	impacts hotplug at all).4281 *4282 *	Return 1 if the cable appears to be 40 wire.4283 */4284 4285static int cable_is_40wire(struct ata_port *ap)4286{4287	struct ata_link *link;4288	struct ata_device *dev;4289 4290	/* If the controller thinks we are 40 wire, we are. */4291	if (ap->cbl == ATA_CBL_PATA40)4292		return 1;4293 4294	/* If the controller thinks we are 80 wire, we are. */4295	if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)4296		return 0;4297 4298	/* If the system is known to be 40 wire short cable (eg4299	 * laptop), then we allow 80 wire modes even if the drive4300	 * isn't sure.4301	 */4302	if (ap->cbl == ATA_CBL_PATA40_SHORT)4303		return 0;4304 4305	/* If the controller doesn't know, we scan.4306	 *4307	 * Note: We look for all 40 wire detects at this point.  Any4308	 *       80 wire detect is taken to be 80 wire cable because4309	 * - in many setups only the one drive (slave if present) will4310	 *   give a valid detect4311	 * - if you have a non detect capable drive you don't want it4312	 *   to colour the choice4313	 */4314	ata_for_each_link(link, ap, EDGE) {4315		ata_for_each_dev(dev, link, ENABLED) {4316			if (!ata_is_40wire(dev))4317				return 0;4318		}4319	}4320	return 1;4321}4322 4323/**4324 *	ata_dev_xfermask - Compute supported xfermask of the given device4325 *	@dev: Device to compute xfermask for4326 *4327 *	Compute supported xfermask of @dev and store it in4328 *	dev->*_mask.  This function is responsible for applying all4329 *	known limits including host controller limits, device quirks, etc...4330 *4331 *	LOCKING:4332 *	None.4333 */4334static void ata_dev_xfermask(struct ata_device *dev)4335{4336	struct ata_link *link = dev->link;4337	struct ata_port *ap = link->ap;4338	struct ata_host *host = ap->host;4339	unsigned int xfer_mask;4340 4341	/* controller modes available */4342	xfer_mask = ata_pack_xfermask(ap->pio_mask,4343				      ap->mwdma_mask, ap->udma_mask);4344 4345	/* drive modes available */4346	xfer_mask &= ata_pack_xfermask(dev->pio_mask,4347				       dev->mwdma_mask, dev->udma_mask);4348	xfer_mask &= ata_id_xfermask(dev->id);4349 4350	/*4351	 *	CFA Advanced TrueIDE timings are not allowed on a shared4352	 *	cable4353	 */4354	if (ata_dev_pair(dev)) {4355		/* No PIO5 or PIO6 */4356		xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));4357		/* No MWDMA3 or MWDMA 4 */4358		xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));4359	}4360 4361	if (ata_dev_nodma(dev)) {4362		xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);4363		ata_dev_warn(dev,4364			     "device does not support DMA, disabling DMA\n");4365	}4366 4367	if ((host->flags & ATA_HOST_SIMPLEX) &&4368	    host->simplex_claimed && host->simplex_claimed != ap) {4369		xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);4370		ata_dev_warn(dev,4371			     "simplex DMA is claimed by other device, disabling DMA\n");4372	}4373 4374	if (ap->flags & ATA_FLAG_NO_IORDY)4375		xfer_mask &= ata_pio_mask_no_iordy(dev);4376 4377	if (ap->ops->mode_filter)4378		xfer_mask = ap->ops->mode_filter(dev, xfer_mask);4379 4380	/* Apply cable rule here.  Don't apply it early because when4381	 * we handle hot plug the cable type can itself change.4382	 * Check this last so that we know if the transfer rate was4383	 * solely limited by the cable.4384	 * Unknown or 80 wire cables reported host side are checked4385	 * drive side as well. Cases where we know a 40wire cable4386	 * is used safely for 80 are not checked here.4387	 */4388	if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))4389		/* UDMA/44 or higher would be available */4390		if (cable_is_40wire(ap)) {4391			ata_dev_warn(dev,4392				     "limited to UDMA/33 due to 40-wire cable\n");4393			xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);4394		}4395 4396	ata_unpack_xfermask(xfer_mask, &dev->pio_mask,4397			    &dev->mwdma_mask, &dev->udma_mask);4398}4399 4400/**4401 *	ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command4402 *	@dev: Device to which command will be sent4403 *4404 *	Issue SET FEATURES - XFER MODE command to device @dev4405 *	on port @ap.4406 *4407 *	LOCKING:4408 *	PCI/etc. bus probe sem.4409 *4410 *	RETURNS:4411 *	0 on success, AC_ERR_* mask otherwise.4412 */4413 4414static unsigned int ata_dev_set_xfermode(struct ata_device *dev)4415{4416	struct ata_taskfile tf;4417 4418	/* set up set-features taskfile */4419	ata_dev_dbg(dev, "set features - xfer mode\n");4420 4421	/* Some controllers and ATAPI devices show flaky interrupt4422	 * behavior after setting xfer mode.  Use polling instead.4423	 */4424	ata_tf_init(dev, &tf);4425	tf.command = ATA_CMD_SET_FEATURES;4426	tf.feature = SETFEATURES_XFER;4427	tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;4428	tf.protocol = ATA_PROT_NODATA;4429	/* If we are using IORDY we must send the mode setting command */4430	if (ata_pio_need_iordy(dev))4431		tf.nsect = dev->xfer_mode;4432	/* If the device has IORDY and the controller does not - turn it off */4433 	else if (ata_id_has_iordy(dev->id))4434		tf.nsect = 0x01;4435	else /* In the ancient relic department - skip all of this */4436		return 0;4437 4438	/*4439	 * On some disks, this command causes spin-up, so we need longer4440	 * timeout.4441	 */4442	return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 15000);4443}4444 4445/**4446 *	ata_dev_set_feature - Issue SET FEATURES4447 *	@dev: Device to which command will be sent4448 *	@subcmd: The SET FEATURES subcommand to be sent4449 *	@action: The sector count represents a subcommand specific action4450 *4451 *	Issue SET FEATURES command to device @dev on port @ap with sector count4452 *4453 *	LOCKING:4454 *	PCI/etc. bus probe sem.4455 *4456 *	RETURNS:4457 *	0 on success, AC_ERR_* mask otherwise.4458 */4459unsigned int ata_dev_set_feature(struct ata_device *dev, u8 subcmd, u8 action)4460{4461	struct ata_taskfile tf;4462	unsigned int timeout = 0;4463 4464	/* set up set-features taskfile */4465	ata_dev_dbg(dev, "set features\n");4466 4467	ata_tf_init(dev, &tf);4468	tf.command = ATA_CMD_SET_FEATURES;4469	tf.feature = subcmd;4470	tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;4471	tf.protocol = ATA_PROT_NODATA;4472	tf.nsect = action;4473 4474	if (subcmd == SETFEATURES_SPINUP)4475		timeout = ata_probe_timeout ?4476			  ata_probe_timeout * 1000 : SETFEATURES_SPINUP_TIMEOUT;4477 4478	return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, timeout);4479}4480EXPORT_SYMBOL_GPL(ata_dev_set_feature);4481 4482/**4483 *	ata_dev_init_params - Issue INIT DEV PARAMS command4484 *	@dev: Device to which command will be sent4485 *	@heads: Number of heads (taskfile parameter)4486 *	@sectors: Number of sectors (taskfile parameter)4487 *4488 *	LOCKING:4489 *	Kernel thread context (may sleep)4490 *4491 *	RETURNS:4492 *	0 on success, AC_ERR_* mask otherwise.4493 */4494static unsigned int ata_dev_init_params(struct ata_device *dev,4495					u16 heads, u16 sectors)4496{4497	struct ata_taskfile tf;4498	unsigned int err_mask;4499 4500	/* Number of sectors per track 1-255. Number of heads 1-16 */4501	if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)4502		return AC_ERR_INVALID;4503 4504	/* set up init dev params taskfile */4505	ata_dev_dbg(dev, "init dev params \n");4506 4507	ata_tf_init(dev, &tf);4508	tf.command = ATA_CMD_INIT_DEV_PARAMS;4509	tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;4510	tf.protocol = ATA_PROT_NODATA;4511	tf.nsect = sectors;4512	tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */4513 4514	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);4515	/* A clean abort indicates an original or just out of spec drive4516	   and we should continue as we issue the setup based on the4517	   drive reported working geometry */4518	if (err_mask == AC_ERR_DEV && (tf.error & ATA_ABORTED))4519		err_mask = 0;4520 4521	return err_mask;4522}4523 4524/**4525 *	atapi_check_dma - Check whether ATAPI DMA can be supported4526 *	@qc: Metadata associated with taskfile to check4527 *4528 *	Allow low-level driver to filter ATA PACKET commands, returning4529 *	a status indicating whether or not it is OK to use DMA for the4530 *	supplied PACKET command.4531 *4532 *	LOCKING:4533 *	spin_lock_irqsave(host lock)4534 *4535 *	RETURNS: 0 when ATAPI DMA can be used4536 *               nonzero otherwise4537 */4538int atapi_check_dma(struct ata_queued_cmd *qc)4539{4540	struct ata_port *ap = qc->ap;4541 4542	/* Don't allow DMA if it isn't multiple of 16 bytes.  Quite a4543	 * few ATAPI devices choke on such DMA requests.4544	 */4545	if (!(qc->dev->quirks & ATA_QUIRK_ATAPI_MOD16_DMA) &&4546	    unlikely(qc->nbytes & 15))4547		return 1;4548 4549	if (ap->ops->check_atapi_dma)4550		return ap->ops->check_atapi_dma(qc);4551 4552	return 0;4553}4554 4555/**4556 *	ata_std_qc_defer - Check whether a qc needs to be deferred4557 *	@qc: ATA command in question4558 *4559 *	Non-NCQ commands cannot run with any other command, NCQ or4560 *	not.  As upper layer only knows the queue depth, we are4561 *	responsible for maintaining exclusion.  This function checks4562 *	whether a new command @qc can be issued.4563 *4564 *	LOCKING:4565 *	spin_lock_irqsave(host lock)4566 *4567 *	RETURNS:4568 *	ATA_DEFER_* if deferring is needed, 0 otherwise.4569 */4570int ata_std_qc_defer(struct ata_queued_cmd *qc)4571{4572	struct ata_link *link = qc->dev->link;4573 4574	if (ata_is_ncq(qc->tf.protocol)) {4575		if (!ata_tag_valid(link->active_tag))4576			return 0;4577	} else {4578		if (!ata_tag_valid(link->active_tag) && !link->sactive)4579			return 0;4580	}4581 4582	return ATA_DEFER_LINK;4583}4584EXPORT_SYMBOL_GPL(ata_std_qc_defer);4585 4586/**4587 *	ata_sg_init - Associate command with scatter-gather table.4588 *	@qc: Command to be associated4589 *	@sg: Scatter-gather table.4590 *	@n_elem: Number of elements in s/g table.4591 *4592 *	Initialize the data-related elements of queued_cmd @qc4593 *	to point to a scatter-gather table @sg, containing @n_elem4594 *	elements.4595 *4596 *	LOCKING:4597 *	spin_lock_irqsave(host lock)4598 */4599void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,4600		 unsigned int n_elem)4601{4602	qc->sg = sg;4603	qc->n_elem = n_elem;4604	qc->cursg = qc->sg;4605}4606 4607#ifdef CONFIG_HAS_DMA4608 4609/**4610 *	ata_sg_clean - Unmap DMA memory associated with command4611 *	@qc: Command containing DMA memory to be released4612 *4613 *	Unmap all mapped DMA memory associated with this command.4614 *4615 *	LOCKING:4616 *	spin_lock_irqsave(host lock)4617 */4618static void ata_sg_clean(struct ata_queued_cmd *qc)4619{4620	struct ata_port *ap = qc->ap;4621	struct scatterlist *sg = qc->sg;4622	int dir = qc->dma_dir;4623 4624	WARN_ON_ONCE(sg == NULL);4625 4626	if (qc->n_elem)4627		dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);4628 4629	qc->flags &= ~ATA_QCFLAG_DMAMAP;4630	qc->sg = NULL;4631}4632 4633/**4634 *	ata_sg_setup - DMA-map the scatter-gather table associated with a command.4635 *	@qc: Command with scatter-gather table to be mapped.4636 *4637 *	DMA-map the scatter-gather table associated with queued_cmd @qc.4638 *4639 *	LOCKING:4640 *	spin_lock_irqsave(host lock)4641 *4642 *	RETURNS:4643 *	Zero on success, negative on error.4644 *4645 */4646static int ata_sg_setup(struct ata_queued_cmd *qc)4647{4648	struct ata_port *ap = qc->ap;4649	unsigned int n_elem;4650 4651	n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);4652	if (n_elem < 1)4653		return -1;4654 4655	qc->orig_n_elem = qc->n_elem;4656	qc->n_elem = n_elem;4657	qc->flags |= ATA_QCFLAG_DMAMAP;4658 4659	return 0;4660}4661 4662#else /* !CONFIG_HAS_DMA */4663 4664static inline void ata_sg_clean(struct ata_queued_cmd *qc) {}4665static inline int ata_sg_setup(struct ata_queued_cmd *qc) { return -1; }4666 4667#endif /* !CONFIG_HAS_DMA */4668 4669/**4670 *	swap_buf_le16 - swap halves of 16-bit words in place4671 *	@buf:  Buffer to swap4672 *	@buf_words:  Number of 16-bit words in buffer.4673 *4674 *	Swap halves of 16-bit words if needed to convert from4675 *	little-endian byte order to native cpu byte order, or4676 *	vice-versa.4677 *4678 *	LOCKING:4679 *	Inherited from caller.4680 */4681void swap_buf_le16(u16 *buf, unsigned int buf_words)4682{4683#ifdef __BIG_ENDIAN4684	unsigned int i;4685 4686	for (i = 0; i < buf_words; i++)4687		buf[i] = le16_to_cpu(buf[i]);4688#endif /* __BIG_ENDIAN */4689}4690 4691/**4692 *	ata_qc_free - free unused ata_queued_cmd4693 *	@qc: Command to complete4694 *4695 *	Designed to free unused ata_queued_cmd object4696 *	in case something prevents using it.4697 *4698 *	LOCKING:4699 *	spin_lock_irqsave(host lock)4700 */4701void ata_qc_free(struct ata_queued_cmd *qc)4702{4703	qc->flags = 0;4704	if (ata_tag_valid(qc->tag))4705		qc->tag = ATA_TAG_POISON;4706}4707 4708void __ata_qc_complete(struct ata_queued_cmd *qc)4709{4710	struct ata_port *ap;4711	struct ata_link *link;4712 4713	if (WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE)))4714		return;4715 4716	ap = qc->ap;4717	link = qc->dev->link;4718 4719	if (likely(qc->flags & ATA_QCFLAG_DMAMAP))4720		ata_sg_clean(qc);4721 4722	/* command should be marked inactive atomically with qc completion */4723	if (ata_is_ncq(qc->tf.protocol)) {4724		link->sactive &= ~(1 << qc->hw_tag);4725		if (!link->sactive)4726			ap->nr_active_links--;4727	} else {4728		link->active_tag = ATA_TAG_POISON;4729		ap->nr_active_links--;4730	}4731 4732	/* clear exclusive status */4733	if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&4734		     ap->excl_link == link))4735		ap->excl_link = NULL;4736 4737	/*4738	 * Mark qc as inactive to prevent the port interrupt handler from4739	 * completing the command twice later, before the error handler is4740	 * called.4741	 */4742	qc->flags &= ~ATA_QCFLAG_ACTIVE;4743	ap->qc_active &= ~(1ULL << qc->tag);4744 4745	/* call completion callback */4746	qc->complete_fn(qc);4747}4748 4749static void fill_result_tf(struct ata_queued_cmd *qc)4750{4751	struct ata_port *ap = qc->ap;4752 4753	/*4754	 * rtf may already be filled (e.g. for successful NCQ commands).4755	 * If that is the case, we have nothing to do.4756	 */4757	if (qc->flags & ATA_QCFLAG_RTF_FILLED)4758		return;4759 4760	qc->result_tf.flags = qc->tf.flags;4761	ap->ops->qc_fill_rtf(qc);4762	qc->flags |= ATA_QCFLAG_RTF_FILLED;4763}4764 4765static void ata_verify_xfer(struct ata_queued_cmd *qc)4766{4767	struct ata_device *dev = qc->dev;4768 4769	if (!ata_is_data(qc->tf.protocol))4770		return;4771 4772	if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))4773		return;4774 4775	dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;4776}4777 4778/**4779 *	ata_qc_complete - Complete an active ATA command4780 *	@qc: Command to complete4781 *4782 *	Indicate to the mid and upper layers that an ATA command has4783 *	completed, with either an ok or not-ok status.4784 *4785 *	Refrain from calling this function multiple times when4786 *	successfully completing multiple NCQ commands.4787 *	ata_qc_complete_multiple() should be used instead, which will4788 *	properly update IRQ expect state.4789 *4790 *	LOCKING:4791 *	spin_lock_irqsave(host lock)4792 */4793void ata_qc_complete(struct ata_queued_cmd *qc)4794{4795	struct ata_port *ap = qc->ap;4796	struct ata_device *dev = qc->dev;4797	struct ata_eh_info *ehi = &dev->link->eh_info;4798 4799	/* Trigger the LED (if available) */4800	ledtrig_disk_activity(!!(qc->tf.flags & ATA_TFLAG_WRITE));4801 4802	/*4803	 * In order to synchronize EH with the regular execution path, a qc that4804	 * is owned by EH is marked with ATA_QCFLAG_EH.4805	 *4806	 * The normal execution path is responsible for not accessing a qc owned4807	 * by EH.  libata core enforces the rule by returning NULL from4808	 * ata_qc_from_tag() for qcs owned by EH.4809	 */4810	if (unlikely(qc->err_mask))4811		qc->flags |= ATA_QCFLAG_EH;4812 4813	/*4814	 * Finish internal commands without any further processing and always4815	 * with the result TF filled.4816	 */4817	if (unlikely(ata_tag_internal(qc->tag))) {4818		fill_result_tf(qc);4819		trace_ata_qc_complete_internal(qc);4820		__ata_qc_complete(qc);4821		return;4822	}4823 4824	/* Non-internal qc has failed.  Fill the result TF and summon EH. */4825	if (unlikely(qc->flags & ATA_QCFLAG_EH)) {4826		fill_result_tf(qc);4827		trace_ata_qc_complete_failed(qc);4828		ata_qc_schedule_eh(qc);4829		return;4830	}4831 4832	WARN_ON_ONCE(ata_port_is_frozen(ap));4833 4834	/* read result TF if requested */4835	if (qc->flags & ATA_QCFLAG_RESULT_TF)4836		fill_result_tf(qc);4837 4838	trace_ata_qc_complete_done(qc);4839 4840	/*4841	 * For CDL commands that completed without an error, check if we have4842	 * sense data (ATA_SENSE is set). If we do, then the command may have4843	 * been aborted by the device due to a limit timeout using the policy4844	 * 0xD. For these commands, invoke EH to get the command sense data.4845	 */4846	if (qc->flags & ATA_QCFLAG_HAS_CDL &&4847	    qc->result_tf.status & ATA_SENSE) {4848		/*4849		 * Tell SCSI EH to not overwrite scmd->result even if this4850		 * command is finished with result SAM_STAT_GOOD.4851		 */4852		qc->scsicmd->flags |= SCMD_FORCE_EH_SUCCESS;4853		qc->flags |= ATA_QCFLAG_EH_SUCCESS_CMD;4854		ehi->dev_action[dev->devno] |= ATA_EH_GET_SUCCESS_SENSE;4855 4856		/*4857		 * set pending so that ata_qc_schedule_eh() does not trigger4858		 * fast drain, and freeze the port.4859		 */4860		ap->pflags |= ATA_PFLAG_EH_PENDING;4861		ata_qc_schedule_eh(qc);4862		return;4863	}4864 4865	/* Some commands need post-processing after successful completion. */4866	switch (qc->tf.command) {4867	case ATA_CMD_SET_FEATURES:4868		if (qc->tf.feature != SETFEATURES_WC_ON &&4869		    qc->tf.feature != SETFEATURES_WC_OFF &&4870		    qc->tf.feature != SETFEATURES_RA_ON &&4871		    qc->tf.feature != SETFEATURES_RA_OFF)4872			break;4873		fallthrough;4874	case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */4875	case ATA_CMD_SET_MULTI: /* multi_count changed */4876		/* revalidate device */4877		ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;4878		ata_port_schedule_eh(ap);4879		break;4880 4881	case ATA_CMD_SLEEP:4882		dev->flags |= ATA_DFLAG_SLEEPING;4883		break;4884	}4885 4886	if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))4887		ata_verify_xfer(qc);4888 4889	__ata_qc_complete(qc);4890}4891EXPORT_SYMBOL_GPL(ata_qc_complete);4892 4893/**4894 *	ata_qc_get_active - get bitmask of active qcs4895 *	@ap: port in question4896 *4897 *	LOCKING:4898 *	spin_lock_irqsave(host lock)4899 *4900 *	RETURNS:4901 *	Bitmask of active qcs4902 */4903u64 ata_qc_get_active(struct ata_port *ap)4904{4905	u64 qc_active = ap->qc_active;4906 4907	/* ATA_TAG_INTERNAL is sent to hw as tag 0 */4908	if (qc_active & (1ULL << ATA_TAG_INTERNAL)) {4909		qc_active |= (1 << 0);4910		qc_active &= ~(1ULL << ATA_TAG_INTERNAL);4911	}4912 4913	return qc_active;4914}4915EXPORT_SYMBOL_GPL(ata_qc_get_active);4916 4917/**4918 *	ata_qc_issue - issue taskfile to device4919 *	@qc: command to issue to device4920 *4921 *	Prepare an ATA command to submission to device.4922 *	This includes mapping the data into a DMA-able4923 *	area, filling in the S/G table, and finally4924 *	writing the taskfile to hardware, starting the command.4925 *4926 *	LOCKING:4927 *	spin_lock_irqsave(host lock)4928 */4929void ata_qc_issue(struct ata_queued_cmd *qc)4930{4931	struct ata_port *ap = qc->ap;4932	struct ata_link *link = qc->dev->link;4933	u8 prot = qc->tf.protocol;4934 4935	/* Make sure only one non-NCQ command is outstanding. */4936	WARN_ON_ONCE(ata_tag_valid(link->active_tag));4937 4938	if (ata_is_ncq(prot)) {4939		WARN_ON_ONCE(link->sactive & (1 << qc->hw_tag));4940 4941		if (!link->sactive)4942			ap->nr_active_links++;4943		link->sactive |= 1 << qc->hw_tag;4944	} else {4945		WARN_ON_ONCE(link->sactive);4946 4947		ap->nr_active_links++;4948		link->active_tag = qc->tag;4949	}4950 4951	qc->flags |= ATA_QCFLAG_ACTIVE;4952	ap->qc_active |= 1ULL << qc->tag;4953 4954	/*4955	 * We guarantee to LLDs that they will have at least one4956	 * non-zero sg if the command is a data command.4957	 */4958	if (ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes))4959		goto sys_err;4960 4961	if (ata_is_dma(prot) || (ata_is_pio(prot) &&4962				 (ap->flags & ATA_FLAG_PIO_DMA)))4963		if (ata_sg_setup(qc))4964			goto sys_err;4965 4966	/* if device is sleeping, schedule reset and abort the link */4967	if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {4968		link->eh_info.action |= ATA_EH_RESET;4969		ata_ehi_push_desc(&link->eh_info, "waking up from sleep");4970		ata_link_abort(link);4971		return;4972	}4973 4974	if (ap->ops->qc_prep) {4975		trace_ata_qc_prep(qc);4976		qc->err_mask |= ap->ops->qc_prep(qc);4977		if (unlikely(qc->err_mask))4978			goto err;4979	}4980 4981	trace_ata_qc_issue(qc);4982	qc->err_mask |= ap->ops->qc_issue(qc);4983	if (unlikely(qc->err_mask))4984		goto err;4985	return;4986 4987sys_err:4988	qc->err_mask |= AC_ERR_SYSTEM;4989err:4990	ata_qc_complete(qc);4991}4992 4993/**4994 *	ata_phys_link_online - test whether the given link is online4995 *	@link: ATA link to test4996 *4997 *	Test whether @link is online.  Note that this function returns4998 *	0 if online status of @link cannot be obtained, so4999 *	ata_link_online(link) != !ata_link_offline(link).5000 *5001 *	LOCKING:5002 *	None.5003 *5004 *	RETURNS:5005 *	True if the port online status is available and online.5006 */5007bool ata_phys_link_online(struct ata_link *link)5008{5009	u32 sstatus;5010 5011	if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&5012	    ata_sstatus_online(sstatus))5013		return true;5014	return false;5015}5016 5017/**5018 *	ata_phys_link_offline - test whether the given link is offline5019 *	@link: ATA link to test5020 *5021 *	Test whether @link is offline.  Note that this function5022 *	returns 0 if offline status of @link cannot be obtained, so5023 *	ata_link_online(link) != !ata_link_offline(link).5024 *5025 *	LOCKING:5026 *	None.5027 *5028 *	RETURNS:5029 *	True if the port offline status is available and offline.5030 */5031bool ata_phys_link_offline(struct ata_link *link)5032{5033	u32 sstatus;5034 5035	if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&5036	    !ata_sstatus_online(sstatus))5037		return true;5038	return false;5039}5040 5041/**5042 *	ata_link_online - test whether the given link is online5043 *	@link: ATA link to test5044 *5045 *	Test whether @link is online.  This is identical to5046 *	ata_phys_link_online() when there's no slave link.  When5047 *	there's a slave link, this function should only be called on5048 *	the master link and will return true if any of M/S links is5049 *	online.5050 *5051 *	LOCKING:5052 *	None.5053 *5054 *	RETURNS:5055 *	True if the port online status is available and online.5056 */5057bool ata_link_online(struct ata_link *link)5058{5059	struct ata_link *slave = link->ap->slave_link;5060 5061	WARN_ON(link == slave);	/* shouldn't be called on slave link */5062 5063	return ata_phys_link_online(link) ||5064		(slave && ata_phys_link_online(slave));5065}5066EXPORT_SYMBOL_GPL(ata_link_online);5067 5068/**5069 *	ata_link_offline - test whether the given link is offline5070 *	@link: ATA link to test5071 *5072 *	Test whether @link is offline.  This is identical to5073 *	ata_phys_link_offline() when there's no slave link.  When5074 *	there's a slave link, this function should only be called on5075 *	the master link and will return true if both M/S links are5076 *	offline.5077 *5078 *	LOCKING:5079 *	None.5080 *5081 *	RETURNS:5082 *	True if the port offline status is available and offline.5083 */5084bool ata_link_offline(struct ata_link *link)5085{5086	struct ata_link *slave = link->ap->slave_link;5087 5088	WARN_ON(link == slave);	/* shouldn't be called on slave link */5089 5090	return ata_phys_link_offline(link) &&5091		(!slave || ata_phys_link_offline(slave));5092}5093EXPORT_SYMBOL_GPL(ata_link_offline);5094 5095#ifdef CONFIG_PM5096static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,5097				unsigned int action, unsigned int ehi_flags,5098				bool async)5099{5100	struct ata_link *link;5101	unsigned long flags;5102 5103	spin_lock_irqsave(ap->lock, flags);5104 5105	/*5106	 * A previous PM operation might still be in progress. Wait for5107	 * ATA_PFLAG_PM_PENDING to clear.5108	 */5109	if (ap->pflags & ATA_PFLAG_PM_PENDING) {5110		spin_unlock_irqrestore(ap->lock, flags);5111		ata_port_wait_eh(ap);5112		spin_lock_irqsave(ap->lock, flags);5113	}5114 5115	/* Request PM operation to EH */5116	ap->pm_mesg = mesg;5117	ap->pflags |= ATA_PFLAG_PM_PENDING;5118	ata_for_each_link(link, ap, HOST_FIRST) {5119		link->eh_info.action |= action;5120		link->eh_info.flags |= ehi_flags;5121	}5122 5123	ata_port_schedule_eh(ap);5124 5125	spin_unlock_irqrestore(ap->lock, flags);5126 5127	if (!async)5128		ata_port_wait_eh(ap);5129}5130 5131static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg,5132			     bool async)5133{5134	/*5135	 * We are about to suspend the port, so we do not care about5136	 * scsi_rescan_device() calls scheduled by previous resume operations.5137	 * The next resume will schedule the rescan again. So cancel any rescan5138	 * that is not done yet.5139	 */5140	cancel_delayed_work_sync(&ap->scsi_rescan_task);5141 5142	/*5143	 * On some hardware, device fails to respond after spun down for5144	 * suspend. As the device will not be used until being resumed, we5145	 * do not need to touch the device. Ask EH to skip the usual stuff5146	 * and proceed directly to suspend.5147	 *5148	 * http://thread.gmane.org/gmane.linux.ide/467645149	 */5150	ata_port_request_pm(ap, mesg, 0,5151			    ATA_EHI_QUIET | ATA_EHI_NO_AUTOPSY |5152			    ATA_EHI_NO_RECOVERY,5153			    async);5154}5155 5156static int ata_port_pm_suspend(struct device *dev)5157{5158	struct ata_port *ap = to_ata_port(dev);5159 5160	if (pm_runtime_suspended(dev))5161		return 0;5162 5163	ata_port_suspend(ap, PMSG_SUSPEND, false);5164	return 0;5165}5166 5167static int ata_port_pm_freeze(struct device *dev)5168{5169	struct ata_port *ap = to_ata_port(dev);5170 5171	if (pm_runtime_suspended(dev))5172		return 0;5173 5174	ata_port_suspend(ap, PMSG_FREEZE, false);5175	return 0;5176}5177 5178static int ata_port_pm_poweroff(struct device *dev)5179{5180	if (!pm_runtime_suspended(dev))5181		ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE, false);5182	return 0;5183}5184 5185static void ata_port_resume(struct ata_port *ap, pm_message_t mesg,5186			    bool async)5187{5188	ata_port_request_pm(ap, mesg, ATA_EH_RESET,5189			    ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,5190			    async);5191}5192 5193static int ata_port_pm_resume(struct device *dev)5194{5195	if (!pm_runtime_suspended(dev))5196		ata_port_resume(to_ata_port(dev), PMSG_RESUME, true);5197	return 0;5198}5199 5200/*5201 * For ODDs, the upper layer will poll for media change every few seconds,5202 * which will make it enter and leave suspend state every few seconds. And5203 * as each suspend will cause a hard/soft reset, the gain of runtime suspend5204 * is very little and the ODD may malfunction after constantly being reset.5205 * So the idle callback here will not proceed to suspend if a non-ZPODD capable5206 * ODD is attached to the port.5207 */5208static int ata_port_runtime_idle(struct device *dev)5209{5210	struct ata_port *ap = to_ata_port(dev);5211	struct ata_link *link;5212	struct ata_device *adev;5213 5214	ata_for_each_link(link, ap, HOST_FIRST) {5215		ata_for_each_dev(adev, link, ENABLED)5216			if (adev->class == ATA_DEV_ATAPI &&5217			    !zpodd_dev_enabled(adev))5218				return -EBUSY;5219	}5220 5221	return 0;5222}5223 5224static int ata_port_runtime_suspend(struct device *dev)5225{5226	ata_port_suspend(to_ata_port(dev), PMSG_AUTO_SUSPEND, false);5227	return 0;5228}5229 5230static int ata_port_runtime_resume(struct device *dev)5231{5232	ata_port_resume(to_ata_port(dev), PMSG_AUTO_RESUME, false);5233	return 0;5234}5235 5236static const struct dev_pm_ops ata_port_pm_ops = {5237	.suspend = ata_port_pm_suspend,5238	.resume = ata_port_pm_resume,5239	.freeze = ata_port_pm_freeze,5240	.thaw = ata_port_pm_resume,5241	.poweroff = ata_port_pm_poweroff,5242	.restore = ata_port_pm_resume,5243 5244	.runtime_suspend = ata_port_runtime_suspend,5245	.runtime_resume = ata_port_runtime_resume,5246	.runtime_idle = ata_port_runtime_idle,5247};5248 5249/* sas ports don't participate in pm runtime management of ata_ports,5250 * and need to resume ata devices at the domain level, not the per-port5251 * level. sas suspend/resume is async to allow parallel port recovery5252 * since sas has multiple ata_port instances per Scsi_Host.5253 */5254void ata_sas_port_suspend(struct ata_port *ap)5255{5256	ata_port_suspend(ap, PMSG_SUSPEND, true);5257}5258EXPORT_SYMBOL_GPL(ata_sas_port_suspend);5259 5260void ata_sas_port_resume(struct ata_port *ap)5261{5262	ata_port_resume(ap, PMSG_RESUME, true);5263}5264EXPORT_SYMBOL_GPL(ata_sas_port_resume);5265 5266/**5267 *	ata_host_suspend - suspend host5268 *	@host: host to suspend5269 *	@mesg: PM message5270 *5271 *	Suspend @host.  Actual operation is performed by port suspend.5272 */5273void ata_host_suspend(struct ata_host *host, pm_message_t mesg)5274{5275	host->dev->power.power_state = mesg;5276}5277EXPORT_SYMBOL_GPL(ata_host_suspend);5278 5279/**5280 *	ata_host_resume - resume host5281 *	@host: host to resume5282 *5283 *	Resume @host.  Actual operation is performed by port resume.5284 */5285void ata_host_resume(struct ata_host *host)5286{5287	host->dev->power.power_state = PMSG_ON;5288}5289EXPORT_SYMBOL_GPL(ata_host_resume);5290#endif5291 5292const struct device_type ata_port_type = {5293	.name = ATA_PORT_TYPE_NAME,5294#ifdef CONFIG_PM5295	.pm = &ata_port_pm_ops,5296#endif5297};5298 5299/**5300 *	ata_dev_init - Initialize an ata_device structure5301 *	@dev: Device structure to initialize5302 *5303 *	Initialize @dev in preparation for probing.5304 *5305 *	LOCKING:5306 *	Inherited from caller.5307 */5308void ata_dev_init(struct ata_device *dev)5309{5310	struct ata_link *link = ata_dev_phys_link(dev);5311	struct ata_port *ap = link->ap;5312	unsigned long flags;5313 5314	/* SATA spd limit is bound to the attached device, reset together */5315	link->sata_spd_limit = link->hw_sata_spd_limit;5316	link->sata_spd = 0;5317 5318	/* High bits of dev->flags are used to record warm plug5319	 * requests which occur asynchronously.  Synchronize using5320	 * host lock.5321	 */5322	spin_lock_irqsave(ap->lock, flags);5323	dev->flags &= ~ATA_DFLAG_INIT_MASK;5324	dev->quirks = 0;5325	spin_unlock_irqrestore(ap->lock, flags);5326 5327	memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,5328	       ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);5329	dev->pio_mask = UINT_MAX;5330	dev->mwdma_mask = UINT_MAX;5331	dev->udma_mask = UINT_MAX;5332}5333 5334/**5335 *	ata_link_init - Initialize an ata_link structure5336 *	@ap: ATA port link is attached to5337 *	@link: Link structure to initialize5338 *	@pmp: Port multiplier port number5339 *5340 *	Initialize @link.5341 *5342 *	LOCKING:5343 *	Kernel thread context (may sleep)5344 */5345void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)5346{5347	int i;5348 5349	/* clear everything except for devices */5350	memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0,5351	       ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN);5352 5353	link->ap = ap;5354	link->pmp = pmp;5355	link->active_tag = ATA_TAG_POISON;5356	link->hw_sata_spd_limit = UINT_MAX;5357 5358	/* can't use iterator, ap isn't initialized yet */5359	for (i = 0; i < ATA_MAX_DEVICES; i++) {5360		struct ata_device *dev = &link->device[i];5361 5362		dev->link = link;5363		dev->devno = dev - link->device;5364#ifdef CONFIG_ATA_ACPI5365		dev->gtf_filter = ata_acpi_gtf_filter;5366#endif5367		ata_dev_init(dev);5368	}5369}5370 5371/**5372 *	sata_link_init_spd - Initialize link->sata_spd_limit5373 *	@link: Link to configure sata_spd_limit for5374 *5375 *	Initialize ``link->[hw_]sata_spd_limit`` to the currently5376 *	configured value.5377 *5378 *	LOCKING:5379 *	Kernel thread context (may sleep).5380 *5381 *	RETURNS:5382 *	0 on success, -errno on failure.5383 */5384int sata_link_init_spd(struct ata_link *link)5385{5386	u8 spd;5387	int rc;5388 5389	rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);5390	if (rc)5391		return rc;5392 5393	spd = (link->saved_scontrol >> 4) & 0xf;5394	if (spd)5395		link->hw_sata_spd_limit &= (1 << spd) - 1;5396 5397	ata_force_link_limits(link);5398 5399	link->sata_spd_limit = link->hw_sata_spd_limit;5400 5401	return 0;5402}5403 5404/**5405 *	ata_port_alloc - allocate and initialize basic ATA port resources5406 *	@host: ATA host this allocated port belongs to5407 *5408 *	Allocate and initialize basic ATA port resources.5409 *5410 *	RETURNS:5411 *	Allocate ATA port on success, NULL on failure.5412 *5413 *	LOCKING:5414 *	Inherited from calling layer (may sleep).5415 */5416struct ata_port *ata_port_alloc(struct ata_host *host)5417{5418	struct ata_port *ap;5419	int id;5420 5421	ap = kzalloc(sizeof(*ap), GFP_KERNEL);5422	if (!ap)5423		return NULL;5424 5425	ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;5426	ap->lock = &host->lock;5427	id = ida_alloc_min(&ata_ida, 1, GFP_KERNEL);5428	if (id < 0) {5429		kfree(ap);5430		return NULL;5431	}5432	ap->print_id = id;5433	ap->host = host;5434	ap->dev = host->dev;5435 5436	mutex_init(&ap->scsi_scan_mutex);5437	INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);5438	INIT_DELAYED_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);5439	INIT_LIST_HEAD(&ap->eh_done_q);5440	init_waitqueue_head(&ap->eh_wait_q);5441	init_completion(&ap->park_req_pending);5442	timer_setup(&ap->fastdrain_timer, ata_eh_fastdrain_timerfn,5443		    TIMER_DEFERRABLE);5444 5445	ap->cbl = ATA_CBL_NONE;5446 5447	ata_link_init(ap, &ap->link, 0);5448 5449#ifdef ATA_IRQ_TRAP5450	ap->stats.unhandled_irq = 1;5451	ap->stats.idle_irq = 1;5452#endif5453	ata_sff_port_init(ap);5454 5455	return ap;5456}5457EXPORT_SYMBOL_GPL(ata_port_alloc);5458 5459void ata_port_free(struct ata_port *ap)5460{5461	if (!ap)5462		return;5463 5464	kfree(ap->pmp_link);5465	kfree(ap->slave_link);5466	ida_free(&ata_ida, ap->print_id);5467	kfree(ap);5468}5469EXPORT_SYMBOL_GPL(ata_port_free);5470 5471static void ata_devres_release(struct device *gendev, void *res)5472{5473	struct ata_host *host = dev_get_drvdata(gendev);5474	int i;5475 5476	for (i = 0; i < host->n_ports; i++) {5477		struct ata_port *ap = host->ports[i];5478 5479		if (!ap)5480			continue;5481 5482		if (ap->scsi_host)5483			scsi_host_put(ap->scsi_host);5484 5485	}5486 5487	dev_set_drvdata(gendev, NULL);5488	ata_host_put(host);5489}5490 5491static void ata_host_release(struct kref *kref)5492{5493	struct ata_host *host = container_of(kref, struct ata_host, kref);5494	int i;5495 5496	for (i = 0; i < host->n_ports; i++) {5497		ata_port_free(host->ports[i]);5498		host->ports[i] = NULL;5499	}5500	kfree(host);5501}5502 5503void ata_host_get(struct ata_host *host)5504{5505	kref_get(&host->kref);5506}5507 5508void ata_host_put(struct ata_host *host)5509{5510	kref_put(&host->kref, ata_host_release);5511}5512EXPORT_SYMBOL_GPL(ata_host_put);5513 5514/**5515 *	ata_host_alloc - allocate and init basic ATA host resources5516 *	@dev: generic device this host is associated with5517 *	@n_ports: the number of ATA ports associated with this host5518 *5519 *	Allocate and initialize basic ATA host resources.  LLD calls5520 *	this function to allocate a host, initializes it fully and5521 *	attaches it using ata_host_register().5522 *5523 *	RETURNS:5524 *	Allocate ATA host on success, NULL on failure.5525 *5526 *	LOCKING:5527 *	Inherited from calling layer (may sleep).5528 */5529struct ata_host *ata_host_alloc(struct device *dev, int n_ports)5530{5531	struct ata_host *host;5532	size_t sz;5533	int i;5534	void *dr;5535 5536	/* alloc a container for our list of ATA ports (buses) */5537	sz = sizeof(struct ata_host) + n_ports * sizeof(void *);5538	host = kzalloc(sz, GFP_KERNEL);5539	if (!host)5540		return NULL;5541 5542	if (!devres_open_group(dev, NULL, GFP_KERNEL)) {5543		kfree(host);5544		return NULL;5545	}5546 5547	dr = devres_alloc(ata_devres_release, 0, GFP_KERNEL);5548	if (!dr) {5549		kfree(host);5550		goto err_out;5551	}5552 5553	devres_add(dev, dr);5554	dev_set_drvdata(dev, host);5555 5556	spin_lock_init(&host->lock);5557	mutex_init(&host->eh_mutex);5558	host->dev = dev;5559	host->n_ports = n_ports;5560	kref_init(&host->kref);5561 5562	/* allocate ports bound to this host */5563	for (i = 0; i < n_ports; i++) {5564		struct ata_port *ap;5565 5566		ap = ata_port_alloc(host);5567		if (!ap)5568			goto err_out;5569 5570		ap->port_no = i;5571		host->ports[i] = ap;5572	}5573 5574	devres_remove_group(dev, NULL);5575	return host;5576 5577 err_out:5578	devres_release_group(dev, NULL);5579	return NULL;5580}5581EXPORT_SYMBOL_GPL(ata_host_alloc);5582 5583/**5584 *	ata_host_alloc_pinfo - alloc host and init with port_info array5585 *	@dev: generic device this host is associated with5586 *	@ppi: array of ATA port_info to initialize host with5587 *	@n_ports: number of ATA ports attached to this host5588 *5589 *	Allocate ATA host and initialize with info from @ppi.  If NULL5590 *	terminated, @ppi may contain fewer entries than @n_ports.  The5591 *	last entry will be used for the remaining ports.5592 *5593 *	RETURNS:5594 *	Allocate ATA host on success, NULL on failure.5595 *5596 *	LOCKING:5597 *	Inherited from calling layer (may sleep).5598 */5599struct ata_host *ata_host_alloc_pinfo(struct device *dev,5600				      const struct ata_port_info * const * ppi,5601				      int n_ports)5602{5603	const struct ata_port_info *pi = &ata_dummy_port_info;5604	struct ata_host *host;5605	int i, j;5606 5607	host = ata_host_alloc(dev, n_ports);5608	if (!host)5609		return NULL;5610 5611	for (i = 0, j = 0; i < host->n_ports; i++) {5612		struct ata_port *ap = host->ports[i];5613 5614		if (ppi[j])5615			pi = ppi[j++];5616 5617		ap->pio_mask = pi->pio_mask;5618		ap->mwdma_mask = pi->mwdma_mask;5619		ap->udma_mask = pi->udma_mask;5620		ap->flags |= pi->flags;5621		ap->link.flags |= pi->link_flags;5622		ap->ops = pi->port_ops;5623 5624		if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))5625			host->ops = pi->port_ops;5626	}5627 5628	return host;5629}5630EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);5631 5632static void ata_host_stop(struct device *gendev, void *res)5633{5634	struct ata_host *host = dev_get_drvdata(gendev);5635	int i;5636 5637	WARN_ON(!(host->flags & ATA_HOST_STARTED));5638 5639	for (i = 0; i < host->n_ports; i++) {5640		struct ata_port *ap = host->ports[i];5641 5642		if (ap->ops->port_stop)5643			ap->ops->port_stop(ap);5644	}5645 5646	if (host->ops->host_stop)5647		host->ops->host_stop(host);5648}5649 5650/**5651 *	ata_finalize_port_ops - finalize ata_port_operations5652 *	@ops: ata_port_operations to finalize5653 *5654 *	An ata_port_operations can inherit from another ops and that5655 *	ops can again inherit from another.  This can go on as many5656 *	times as necessary as long as there is no loop in the5657 *	inheritance chain.5658 *5659 *	Ops tables are finalized when the host is started.  NULL or5660 *	unspecified entries are inherited from the closet ancestor5661 *	which has the method and the entry is populated with it.5662 *	After finalization, the ops table directly points to all the5663 *	methods and ->inherits is no longer necessary and cleared.5664 *5665 *	Using ATA_OP_NULL, inheriting ops can force a method to NULL.5666 *5667 *	LOCKING:5668 *	None.5669 */5670static void ata_finalize_port_ops(struct ata_port_operations *ops)5671{5672	static DEFINE_SPINLOCK(lock);5673	const struct ata_port_operations *cur;5674	void **begin = (void **)ops;5675	void **end = (void **)&ops->inherits;5676	void **pp;5677 5678	if (!ops || !ops->inherits)5679		return;5680 5681	spin_lock(&lock);5682 5683	for (cur = ops->inherits; cur; cur = cur->inherits) {5684		void **inherit = (void **)cur;5685 5686		for (pp = begin; pp < end; pp++, inherit++)5687			if (!*pp)5688				*pp = *inherit;5689	}5690 5691	for (pp = begin; pp < end; pp++)5692		if (IS_ERR(*pp))5693			*pp = NULL;5694 5695	ops->inherits = NULL;5696 5697	spin_unlock(&lock);5698}5699 5700/**5701 *	ata_host_start - start and freeze ports of an ATA host5702 *	@host: ATA host to start ports for5703 *5704 *	Start and then freeze ports of @host.  Started status is5705 *	recorded in host->flags, so this function can be called5706 *	multiple times.  Ports are guaranteed to get started only5707 *	once.  If host->ops is not initialized yet, it is set to the5708 *	first non-dummy port ops.5709 *5710 *	LOCKING:5711 *	Inherited from calling layer (may sleep).5712 *5713 *	RETURNS:5714 *	0 if all ports are started successfully, -errno otherwise.5715 */5716int ata_host_start(struct ata_host *host)5717{5718	int have_stop = 0;5719	void *start_dr = NULL;5720	int i, rc;5721 5722	if (host->flags & ATA_HOST_STARTED)5723		return 0;5724 5725	ata_finalize_port_ops(host->ops);5726 5727	for (i = 0; i < host->n_ports; i++) {5728		struct ata_port *ap = host->ports[i];5729 5730		ata_finalize_port_ops(ap->ops);5731 5732		if (!host->ops && !ata_port_is_dummy(ap))5733			host->ops = ap->ops;5734 5735		if (ap->ops->port_stop)5736			have_stop = 1;5737	}5738 5739	if (host->ops && host->ops->host_stop)5740		have_stop = 1;5741 5742	if (have_stop) {5743		start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);5744		if (!start_dr)5745			return -ENOMEM;5746	}5747 5748	for (i = 0; i < host->n_ports; i++) {5749		struct ata_port *ap = host->ports[i];5750 5751		if (ap->ops->port_start) {5752			rc = ap->ops->port_start(ap);5753			if (rc) {5754				if (rc != -ENODEV)5755					dev_err(host->dev,5756						"failed to start port %d (errno=%d)\n",5757						i, rc);5758				goto err_out;5759			}5760		}5761		ata_eh_freeze_port(ap);5762	}5763 5764	if (start_dr)5765		devres_add(host->dev, start_dr);5766	host->flags |= ATA_HOST_STARTED;5767	return 0;5768 5769 err_out:5770	while (--i >= 0) {5771		struct ata_port *ap = host->ports[i];5772 5773		if (ap->ops->port_stop)5774			ap->ops->port_stop(ap);5775	}5776	devres_free(start_dr);5777	return rc;5778}5779EXPORT_SYMBOL_GPL(ata_host_start);5780 5781/**5782 *	ata_host_init - Initialize a host struct for sas (ipr, libsas)5783 *	@host:	host to initialize5784 *	@dev:	device host is attached to5785 *	@ops:	port_ops5786 *5787 */5788void ata_host_init(struct ata_host *host, struct device *dev,5789		   struct ata_port_operations *ops)5790{5791	spin_lock_init(&host->lock);5792	mutex_init(&host->eh_mutex);5793	host->n_tags = ATA_MAX_QUEUE;5794	host->dev = dev;5795	host->ops = ops;5796	kref_init(&host->kref);5797}5798EXPORT_SYMBOL_GPL(ata_host_init);5799 5800void ata_port_probe(struct ata_port *ap)5801{5802	struct ata_eh_info *ehi = &ap->link.eh_info;5803	unsigned long flags;5804 5805	/* kick EH for boot probing */5806	spin_lock_irqsave(ap->lock, flags);5807 5808	ehi->probe_mask |= ATA_ALL_DEVICES;5809	ehi->action |= ATA_EH_RESET;5810	ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;5811 5812	ap->pflags &= ~ATA_PFLAG_INITIALIZING;5813	ap->pflags |= ATA_PFLAG_LOADING;5814	ata_port_schedule_eh(ap);5815 5816	spin_unlock_irqrestore(ap->lock, flags);5817}5818EXPORT_SYMBOL_GPL(ata_port_probe);5819 5820static void async_port_probe(void *data, async_cookie_t cookie)5821{5822	struct ata_port *ap = data;5823 5824	/*5825	 * If we're not allowed to scan this host in parallel,5826	 * we need to wait until all previous scans have completed5827	 * before going further.5828	 * Jeff Garzik says this is only within a controller, so we5829	 * don't need to wait for port 0, only for later ports.5830	 */5831	if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)5832		async_synchronize_cookie(cookie);5833 5834	ata_port_probe(ap);5835	ata_port_wait_eh(ap);5836 5837	/* in order to keep device order, we need to synchronize at this point */5838	async_synchronize_cookie(cookie);5839 5840	ata_scsi_scan_host(ap, 1);5841}5842 5843/**5844 *	ata_host_register - register initialized ATA host5845 *	@host: ATA host to register5846 *	@sht: template for SCSI host5847 *5848 *	Register initialized ATA host.  @host is allocated using5849 *	ata_host_alloc() and fully initialized by LLD.  This function5850 *	starts ports, registers @host with ATA and SCSI layers and5851 *	probe registered devices.5852 *5853 *	LOCKING:5854 *	Inherited from calling layer (may sleep).5855 *5856 *	RETURNS:5857 *	0 on success, -errno otherwise.5858 */5859int ata_host_register(struct ata_host *host, const struct scsi_host_template *sht)5860{5861	int i, rc;5862 5863	host->n_tags = clamp(sht->can_queue, 1, ATA_MAX_QUEUE);5864 5865	/* host must have been started */5866	if (!(host->flags & ATA_HOST_STARTED)) {5867		dev_err(host->dev, "BUG: trying to register unstarted host\n");5868		WARN_ON(1);5869		return -EINVAL;5870	}5871 5872	/* Create associated sysfs transport objects  */5873	for (i = 0; i < host->n_ports; i++) {5874		rc = ata_tport_add(host->dev,host->ports[i]);5875		if (rc) {5876			goto err_tadd;5877		}5878	}5879 5880	rc = ata_scsi_add_hosts(host, sht);5881	if (rc)5882		goto err_tadd;5883 5884	/* set cable, sata_spd_limit and report */5885	for (i = 0; i < host->n_ports; i++) {5886		struct ata_port *ap = host->ports[i];5887		unsigned int xfer_mask;5888 5889		/* set SATA cable type if still unset */5890		if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))5891			ap->cbl = ATA_CBL_SATA;5892 5893		/* init sata_spd_limit to the current value */5894		sata_link_init_spd(&ap->link);5895		if (ap->slave_link)5896			sata_link_init_spd(ap->slave_link);5897 5898		/* print per-port info to dmesg */5899		xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,5900					      ap->udma_mask);5901 5902		if (!ata_port_is_dummy(ap)) {5903			ata_port_info(ap, "%cATA max %s %s\n",5904				      (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',5905				      ata_mode_string(xfer_mask),5906				      ap->link.eh_info.desc);5907			ata_ehi_clear_desc(&ap->link.eh_info);5908		} else5909			ata_port_info(ap, "DUMMY\n");5910	}5911 5912	/* perform each probe asynchronously */5913	for (i = 0; i < host->n_ports; i++) {5914		struct ata_port *ap = host->ports[i];5915		ap->cookie = async_schedule(async_port_probe, ap);5916	}5917 5918	return 0;5919 5920 err_tadd:5921	while (--i >= 0) {5922		ata_tport_delete(host->ports[i]);5923	}5924	return rc;5925 5926}5927EXPORT_SYMBOL_GPL(ata_host_register);5928 5929/**5930 *	ata_host_activate - start host, request IRQ and register it5931 *	@host: target ATA host5932 *	@irq: IRQ to request5933 *	@irq_handler: irq_handler used when requesting IRQ5934 *	@irq_flags: irq_flags used when requesting IRQ5935 *	@sht: scsi_host_template to use when registering the host5936 *5937 *	After allocating an ATA host and initializing it, most libata5938 *	LLDs perform three steps to activate the host - start host,5939 *	request IRQ and register it.  This helper takes necessary5940 *	arguments and performs the three steps in one go.5941 *5942 *	An invalid IRQ skips the IRQ registration and expects the host to5943 *	have set polling mode on the port. In this case, @irq_handler5944 *	should be NULL.5945 *5946 *	LOCKING:5947 *	Inherited from calling layer (may sleep).5948 *5949 *	RETURNS:5950 *	0 on success, -errno otherwise.5951 */5952int ata_host_activate(struct ata_host *host, int irq,5953		      irq_handler_t irq_handler, unsigned long irq_flags,5954		      const struct scsi_host_template *sht)5955{5956	int i, rc;5957	char *irq_desc;5958 5959	rc = ata_host_start(host);5960	if (rc)5961		return rc;5962 5963	/* Special case for polling mode */5964	if (!irq) {5965		WARN_ON(irq_handler);5966		return ata_host_register(host, sht);5967	}5968 5969	irq_desc = devm_kasprintf(host->dev, GFP_KERNEL, "%s[%s]",5970				  dev_driver_string(host->dev),5971				  dev_name(host->dev));5972	if (!irq_desc)5973		return -ENOMEM;5974 5975	rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,5976			      irq_desc, host);5977	if (rc)5978		return rc;5979 5980	for (i = 0; i < host->n_ports; i++)5981		ata_port_desc_misc(host->ports[i], irq);5982 5983	rc = ata_host_register(host, sht);5984	/* if failed, just free the IRQ and leave ports alone */5985	if (rc)5986		devm_free_irq(host->dev, irq, host);5987 5988	return rc;5989}5990EXPORT_SYMBOL_GPL(ata_host_activate);5991 5992/**5993 *	ata_dev_free_resources - Free a device resources5994 *	@dev: Target ATA device5995 *5996 *	Free resources allocated to support a device features.5997 *5998 *	LOCKING:5999 *	Kernel thread context (may sleep).6000 */6001void ata_dev_free_resources(struct ata_device *dev)6002{6003	if (zpodd_dev_enabled(dev))6004		zpodd_exit(dev);6005 6006	ata_dev_cleanup_cdl_resources(dev);6007}6008 6009/**6010 *	ata_port_detach - Detach ATA port in preparation of device removal6011 *	@ap: ATA port to be detached6012 *6013 *	Detach all ATA devices and the associated SCSI devices of @ap;6014 *	then, remove the associated SCSI host.  @ap is guaranteed to6015 *	be quiescent on return from this function.6016 *6017 *	LOCKING:6018 *	Kernel thread context (may sleep).6019 */6020static void ata_port_detach(struct ata_port *ap)6021{6022	unsigned long flags;6023	struct ata_link *link;6024	struct ata_device *dev;6025 6026	/* Ensure ata_port probe has completed */6027	async_synchronize_cookie(ap->cookie + 1);6028 6029	/* Wait for any ongoing EH */6030	ata_port_wait_eh(ap);6031 6032	mutex_lock(&ap->scsi_scan_mutex);6033	spin_lock_irqsave(ap->lock, flags);6034 6035	/* Remove scsi devices */6036	ata_for_each_link(link, ap, HOST_FIRST) {6037		ata_for_each_dev(dev, link, ALL) {6038			if (dev->sdev) {6039				spin_unlock_irqrestore(ap->lock, flags);6040				scsi_remove_device(dev->sdev);6041				spin_lock_irqsave(ap->lock, flags);6042				dev->sdev = NULL;6043			}6044		}6045	}6046 6047	/* Tell EH to disable all devices */6048	ap->pflags |= ATA_PFLAG_UNLOADING;6049	ata_port_schedule_eh(ap);6050 6051	spin_unlock_irqrestore(ap->lock, flags);6052	mutex_unlock(&ap->scsi_scan_mutex);6053 6054	/* wait till EH commits suicide */6055	ata_port_wait_eh(ap);6056 6057	/* it better be dead now */6058	WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));6059 6060	cancel_delayed_work_sync(&ap->hotplug_task);6061	cancel_delayed_work_sync(&ap->scsi_rescan_task);6062 6063	/* Delete port multiplier link transport devices */6064	if (ap->pmp_link) {6065		int i;6066 6067		for (i = 0; i < SATA_PMP_MAX_PORTS; i++)6068			ata_tlink_delete(&ap->pmp_link[i]);6069	}6070 6071	/* Remove the associated SCSI host */6072	scsi_remove_host(ap->scsi_host);6073	ata_tport_delete(ap);6074}6075 6076/**6077 *	ata_host_detach - Detach all ports of an ATA host6078 *	@host: Host to detach6079 *6080 *	Detach all ports of @host.6081 *6082 *	LOCKING:6083 *	Kernel thread context (may sleep).6084 */6085void ata_host_detach(struct ata_host *host)6086{6087	int i;6088 6089	for (i = 0; i < host->n_ports; i++)6090		ata_port_detach(host->ports[i]);6091 6092	/* the host is dead now, dissociate ACPI */6093	ata_acpi_dissociate(host);6094}6095EXPORT_SYMBOL_GPL(ata_host_detach);6096 6097#ifdef CONFIG_PCI6098 6099/**6100 *	ata_pci_remove_one - PCI layer callback for device removal6101 *	@pdev: PCI device that was removed6102 *6103 *	PCI layer indicates to libata via this hook that hot-unplug or6104 *	module unload event has occurred.  Detach all ports.  Resource6105 *	release is handled via devres.6106 *6107 *	LOCKING:6108 *	Inherited from PCI layer (may sleep).6109 */6110void ata_pci_remove_one(struct pci_dev *pdev)6111{6112	struct ata_host *host = pci_get_drvdata(pdev);6113 6114	ata_host_detach(host);6115}6116EXPORT_SYMBOL_GPL(ata_pci_remove_one);6117 6118void ata_pci_shutdown_one(struct pci_dev *pdev)6119{6120	struct ata_host *host = pci_get_drvdata(pdev);6121	int i;6122 6123	for (i = 0; i < host->n_ports; i++) {6124		struct ata_port *ap = host->ports[i];6125 6126		ap->pflags |= ATA_PFLAG_FROZEN;6127 6128		/* Disable port interrupts */6129		if (ap->ops->freeze)6130			ap->ops->freeze(ap);6131 6132		/* Stop the port DMA engines */6133		if (ap->ops->port_stop)6134			ap->ops->port_stop(ap);6135	}6136}6137EXPORT_SYMBOL_GPL(ata_pci_shutdown_one);6138 6139/* move to PCI subsystem */6140int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)6141{6142	unsigned long tmp = 0;6143 6144	switch (bits->width) {6145	case 1: {6146		u8 tmp8 = 0;6147		pci_read_config_byte(pdev, bits->reg, &tmp8);6148		tmp = tmp8;6149		break;6150	}6151	case 2: {6152		u16 tmp16 = 0;6153		pci_read_config_word(pdev, bits->reg, &tmp16);6154		tmp = tmp16;6155		break;6156	}6157	case 4: {6158		u32 tmp32 = 0;6159		pci_read_config_dword(pdev, bits->reg, &tmp32);6160		tmp = tmp32;6161		break;6162	}6163 6164	default:6165		return -EINVAL;6166	}6167 6168	tmp &= bits->mask;6169 6170	return (tmp == bits->val) ? 1 : 0;6171}6172EXPORT_SYMBOL_GPL(pci_test_config_bits);6173 6174#ifdef CONFIG_PM6175void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)6176{6177	pci_save_state(pdev);6178	pci_disable_device(pdev);6179 6180	if (mesg.event & PM_EVENT_SLEEP)6181		pci_set_power_state(pdev, PCI_D3hot);6182}6183EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);6184 6185int ata_pci_device_do_resume(struct pci_dev *pdev)6186{6187	int rc;6188 6189	pci_set_power_state(pdev, PCI_D0);6190	pci_restore_state(pdev);6191 6192	rc = pcim_enable_device(pdev);6193	if (rc) {6194		dev_err(&pdev->dev,6195			"failed to enable device after resume (%d)\n", rc);6196		return rc;6197	}6198 6199	pci_set_master(pdev);6200	return 0;6201}6202EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);6203 6204int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)6205{6206	struct ata_host *host = pci_get_drvdata(pdev);6207 6208	ata_host_suspend(host, mesg);6209 6210	ata_pci_device_do_suspend(pdev, mesg);6211 6212	return 0;6213}6214EXPORT_SYMBOL_GPL(ata_pci_device_suspend);6215 6216int ata_pci_device_resume(struct pci_dev *pdev)6217{6218	struct ata_host *host = pci_get_drvdata(pdev);6219	int rc;6220 6221	rc = ata_pci_device_do_resume(pdev);6222	if (rc == 0)6223		ata_host_resume(host);6224	return rc;6225}6226EXPORT_SYMBOL_GPL(ata_pci_device_resume);6227#endif /* CONFIG_PM */6228#endif /* CONFIG_PCI */6229 6230/**6231 *	ata_platform_remove_one - Platform layer callback for device removal6232 *	@pdev: Platform device that was removed6233 *6234 *	Platform layer indicates to libata via this hook that hot-unplug or6235 *	module unload event has occurred.  Detach all ports.  Resource6236 *	release is handled via devres.6237 *6238 *	LOCKING:6239 *	Inherited from platform layer (may sleep).6240 */6241void ata_platform_remove_one(struct platform_device *pdev)6242{6243	struct ata_host *host = platform_get_drvdata(pdev);6244 6245	ata_host_detach(host);6246}6247EXPORT_SYMBOL_GPL(ata_platform_remove_one);6248 6249#ifdef CONFIG_ATA_FORCE6250 6251#define force_cbl(name, flag)				\6252	{ #name,	.cbl		= (flag) }6253 6254#define force_spd_limit(spd, val)			\6255	{ #spd,	.spd_limit		= (val) }6256 6257#define force_xfer(mode, shift)				\6258	{ #mode,	.xfer_mask	= (1UL << (shift)) }6259 6260#define force_lflag_on(name, flags)			\6261	{ #name,	.lflags_on	= (flags) }6262 6263#define force_lflag_onoff(name, flags)			\6264	{ "no" #name,	.lflags_on	= (flags) },	\6265	{ #name,	.lflags_off	= (flags) }6266 6267#define force_quirk_on(name, flag)			\6268	{ #name,	.quirk_on	= (flag) }6269 6270#define force_quirk_onoff(name, flag)			\6271	{ "no" #name,	.quirk_on	= (flag) },	\6272	{ #name,	.quirk_off	= (flag) }6273 6274static const struct ata_force_param force_tbl[] __initconst = {6275	force_cbl(40c,			ATA_CBL_PATA40),6276	force_cbl(80c,			ATA_CBL_PATA80),6277	force_cbl(short40c,		ATA_CBL_PATA40_SHORT),6278	force_cbl(unk,			ATA_CBL_PATA_UNK),6279	force_cbl(ign,			ATA_CBL_PATA_IGN),6280	force_cbl(sata,			ATA_CBL_SATA),6281 6282	force_spd_limit(1.5Gbps,	1),6283	force_spd_limit(3.0Gbps,	2),6284 6285	force_xfer(pio0,		ATA_SHIFT_PIO + 0),6286	force_xfer(pio1,		ATA_SHIFT_PIO + 1),6287	force_xfer(pio2,		ATA_SHIFT_PIO + 2),6288	force_xfer(pio3,		ATA_SHIFT_PIO + 3),6289	force_xfer(pio4,		ATA_SHIFT_PIO + 4),6290	force_xfer(pio5,		ATA_SHIFT_PIO + 5),6291	force_xfer(pio6,		ATA_SHIFT_PIO + 6),6292	force_xfer(mwdma0,		ATA_SHIFT_MWDMA + 0),6293	force_xfer(mwdma1,		ATA_SHIFT_MWDMA + 1),6294	force_xfer(mwdma2,		ATA_SHIFT_MWDMA + 2),6295	force_xfer(mwdma3,		ATA_SHIFT_MWDMA + 3),6296	force_xfer(mwdma4,		ATA_SHIFT_MWDMA + 4),6297	force_xfer(udma0,		ATA_SHIFT_UDMA + 0),6298	force_xfer(udma16,		ATA_SHIFT_UDMA + 0),6299	force_xfer(udma/16,		ATA_SHIFT_UDMA + 0),6300	force_xfer(udma1,		ATA_SHIFT_UDMA + 1),6301	force_xfer(udma25,		ATA_SHIFT_UDMA + 1),6302	force_xfer(udma/25,		ATA_SHIFT_UDMA + 1),6303	force_xfer(udma2,		ATA_SHIFT_UDMA + 2),6304	force_xfer(udma33,		ATA_SHIFT_UDMA + 2),6305	force_xfer(udma/33,		ATA_SHIFT_UDMA + 2),6306	force_xfer(udma3,		ATA_SHIFT_UDMA + 3),6307	force_xfer(udma44,		ATA_SHIFT_UDMA + 3),6308	force_xfer(udma/44,		ATA_SHIFT_UDMA + 3),6309	force_xfer(udma4,		ATA_SHIFT_UDMA + 4),6310	force_xfer(udma66,		ATA_SHIFT_UDMA + 4),6311	force_xfer(udma/66,		ATA_SHIFT_UDMA + 4),6312	force_xfer(udma5,		ATA_SHIFT_UDMA + 5),6313	force_xfer(udma100,		ATA_SHIFT_UDMA + 5),6314	force_xfer(udma/100,		ATA_SHIFT_UDMA + 5),6315	force_xfer(udma6,		ATA_SHIFT_UDMA + 6),6316	force_xfer(udma133,		ATA_SHIFT_UDMA + 6),6317	force_xfer(udma/133,		ATA_SHIFT_UDMA + 6),6318	force_xfer(udma7,		ATA_SHIFT_UDMA + 7),6319 6320	force_lflag_on(nohrst,		ATA_LFLAG_NO_HRST),6321	force_lflag_on(nosrst,		ATA_LFLAG_NO_SRST),6322	force_lflag_on(norst,		ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST),6323	force_lflag_on(rstonce,		ATA_LFLAG_RST_ONCE),6324	force_lflag_onoff(dbdelay,	ATA_LFLAG_NO_DEBOUNCE_DELAY),6325 6326	force_quirk_onoff(ncq,		ATA_QUIRK_NONCQ),6327	force_quirk_onoff(ncqtrim,	ATA_QUIRK_NO_NCQ_TRIM),6328	force_quirk_onoff(ncqati,	ATA_QUIRK_NO_NCQ_ON_ATI),6329 6330	force_quirk_onoff(trim,		ATA_QUIRK_NOTRIM),6331	force_quirk_on(trim_zero,	ATA_QUIRK_ZERO_AFTER_TRIM),6332	force_quirk_on(max_trim_128m,	ATA_QUIRK_MAX_TRIM_128M),6333 6334	force_quirk_onoff(dma,		ATA_QUIRK_NODMA),6335	force_quirk_on(atapi_dmadir,	ATA_QUIRK_ATAPI_DMADIR),6336	force_quirk_on(atapi_mod16_dma,	ATA_QUIRK_ATAPI_MOD16_DMA),6337 6338	force_quirk_onoff(dmalog,	ATA_QUIRK_NO_DMA_LOG),6339	force_quirk_onoff(iddevlog,	ATA_QUIRK_NO_ID_DEV_LOG),6340	force_quirk_onoff(logdir,	ATA_QUIRK_NO_LOG_DIR),6341 6342	force_quirk_on(max_sec_128,	ATA_QUIRK_MAX_SEC_128),6343	force_quirk_on(max_sec_1024,	ATA_QUIRK_MAX_SEC_1024),6344	force_quirk_on(max_sec_lba48,	ATA_QUIRK_MAX_SEC_LBA48),6345 6346	force_quirk_onoff(lpm,		ATA_QUIRK_NOLPM),6347	force_quirk_onoff(setxfer,	ATA_QUIRK_NOSETXFER),6348	force_quirk_on(dump_id,		ATA_QUIRK_DUMP_ID),6349	force_quirk_onoff(fua,		ATA_QUIRK_NO_FUA),6350 6351	force_quirk_on(disable,		ATA_QUIRK_DISABLE),6352};6353 6354static int __init ata_parse_force_one(char **cur,6355				      struct ata_force_ent *force_ent,6356				      const char **reason)6357{6358	char *start = *cur, *p = *cur;6359	char *id, *val, *endp;6360	const struct ata_force_param *match_fp = NULL;6361	int nr_matches = 0, i;6362 6363	/* find where this param ends and update *cur */6364	while (*p != '\0' && *p != ',')6365		p++;6366 6367	if (*p == '\0')6368		*cur = p;6369	else6370		*cur = p + 1;6371 6372	*p = '\0';6373 6374	/* parse */6375	p = strchr(start, ':');6376	if (!p) {6377		val = strstrip(start);6378		goto parse_val;6379	}6380	*p = '\0';6381 6382	id = strstrip(start);6383	val = strstrip(p + 1);6384 6385	/* parse id */6386	p = strchr(id, '.');6387	if (p) {6388		*p++ = '\0';6389		force_ent->device = simple_strtoul(p, &endp, 10);6390		if (p == endp || *endp != '\0') {6391			*reason = "invalid device";6392			return -EINVAL;6393		}6394	}6395 6396	force_ent->port = simple_strtoul(id, &endp, 10);6397	if (id == endp || *endp != '\0') {6398		*reason = "invalid port/link";6399		return -EINVAL;6400	}6401 6402 parse_val:6403	/* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */6404	for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {6405		const struct ata_force_param *fp = &force_tbl[i];6406 6407		if (strncasecmp(val, fp->name, strlen(val)))6408			continue;6409 6410		nr_matches++;6411		match_fp = fp;6412 6413		if (strcasecmp(val, fp->name) == 0) {6414			nr_matches = 1;6415			break;6416		}6417	}6418 6419	if (!nr_matches) {6420		*reason = "unknown value";6421		return -EINVAL;6422	}6423	if (nr_matches > 1) {6424		*reason = "ambiguous value";6425		return -EINVAL;6426	}6427 6428	force_ent->param = *match_fp;6429 6430	return 0;6431}6432 6433static void __init ata_parse_force_param(void)6434{6435	int idx = 0, size = 1;6436	int last_port = -1, last_device = -1;6437	char *p, *cur, *next;6438 6439	/* Calculate maximum number of params and allocate ata_force_tbl */6440	for (p = ata_force_param_buf; *p; p++)6441		if (*p == ',')6442			size++;6443 6444	ata_force_tbl = kcalloc(size, sizeof(ata_force_tbl[0]), GFP_KERNEL);6445	if (!ata_force_tbl) {6446		printk(KERN_WARNING "ata: failed to extend force table, "6447		       "libata.force ignored\n");6448		return;6449	}6450 6451	/* parse and populate the table */6452	for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {6453		const char *reason = "";6454		struct ata_force_ent te = { .port = -1, .device = -1 };6455 6456		next = cur;6457		if (ata_parse_force_one(&next, &te, &reason)) {6458			printk(KERN_WARNING "ata: failed to parse force "6459			       "parameter \"%s\" (%s)\n",6460			       cur, reason);6461			continue;6462		}6463 6464		if (te.port == -1) {6465			te.port = last_port;6466			te.device = last_device;6467		}6468 6469		ata_force_tbl[idx++] = te;6470 6471		last_port = te.port;6472		last_device = te.device;6473	}6474 6475	ata_force_tbl_size = idx;6476}6477 6478static void ata_free_force_param(void)6479{6480	kfree(ata_force_tbl);6481}6482#else6483static inline void ata_parse_force_param(void) { }6484static inline void ata_free_force_param(void) { }6485#endif6486 6487static int __init ata_init(void)6488{6489	int rc;6490 6491	ata_parse_force_param();6492 6493	rc = ata_sff_init();6494	if (rc) {6495		ata_free_force_param();6496		return rc;6497	}6498 6499	libata_transport_init();6500	ata_scsi_transport_template = ata_attach_transport();6501	if (!ata_scsi_transport_template) {6502		ata_sff_exit();6503		rc = -ENOMEM;6504		goto err_out;6505	}6506 6507	printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");6508	return 0;6509 6510err_out:6511	return rc;6512}6513 6514static void __exit ata_exit(void)6515{6516	ata_release_transport(ata_scsi_transport_template);6517	libata_transport_exit();6518	ata_sff_exit();6519	ata_free_force_param();6520}6521 6522subsys_initcall(ata_init);6523module_exit(ata_exit);6524 6525static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1);6526 6527int ata_ratelimit(void)6528{6529	return __ratelimit(&ratelimit);6530}6531EXPORT_SYMBOL_GPL(ata_ratelimit);6532 6533/**6534 *	ata_msleep - ATA EH owner aware msleep6535 *	@ap: ATA port to attribute the sleep to6536 *	@msecs: duration to sleep in milliseconds6537 *6538 *	Sleeps @msecs.  If the current task is owner of @ap's EH, the6539 *	ownership is released before going to sleep and reacquired6540 *	after the sleep is complete.  IOW, other ports sharing the6541 *	@ap->host will be allowed to own the EH while this task is6542 *	sleeping.6543 *6544 *	LOCKING:6545 *	Might sleep.6546 */6547void ata_msleep(struct ata_port *ap, unsigned int msecs)6548{6549	bool owns_eh = ap && ap->host->eh_owner == current;6550 6551	if (owns_eh)6552		ata_eh_release(ap);6553 6554	if (msecs < 20) {6555		unsigned long usecs = msecs * USEC_PER_MSEC;6556		usleep_range(usecs, usecs + 50);6557	} else {6558		msleep(msecs);6559	}6560 6561	if (owns_eh)6562		ata_eh_acquire(ap);6563}6564EXPORT_SYMBOL_GPL(ata_msleep);6565 6566/**6567 *	ata_wait_register - wait until register value changes6568 *	@ap: ATA port to wait register for, can be NULL6569 *	@reg: IO-mapped register6570 *	@mask: Mask to apply to read register value6571 *	@val: Wait condition6572 *	@interval: polling interval in milliseconds6573 *	@timeout: timeout in milliseconds6574 *6575 *	Waiting for some bits of register to change is a common6576 *	operation for ATA controllers.  This function reads 32bit LE6577 *	IO-mapped register @reg and tests for the following condition.6578 *6579 *	(*@reg & mask) != val6580 *6581 *	If the condition is met, it returns; otherwise, the process is6582 *	repeated after @interval_msec until timeout.6583 *6584 *	LOCKING:6585 *	Kernel thread context (may sleep)6586 *6587 *	RETURNS:6588 *	The final register value.6589 */6590u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val,6591		      unsigned int interval, unsigned int timeout)6592{6593	unsigned long deadline;6594	u32 tmp;6595 6596	tmp = ioread32(reg);6597 6598	/* Calculate timeout _after_ the first read to make sure6599	 * preceding writes reach the controller before starting to6600	 * eat away the timeout.6601	 */6602	deadline = ata_deadline(jiffies, timeout);6603 6604	while ((tmp & mask) == val && time_before(jiffies, deadline)) {6605		ata_msleep(ap, interval);6606		tmp = ioread32(reg);6607	}6608 6609	return tmp;6610}6611EXPORT_SYMBOL_GPL(ata_wait_register);6612 6613/*6614 * Dummy port_ops6615 */6616static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)6617{6618	return AC_ERR_SYSTEM;6619}6620 6621static void ata_dummy_error_handler(struct ata_port *ap)6622{6623	/* truly dummy */6624}6625 6626struct ata_port_operations ata_dummy_port_ops = {6627	.qc_issue		= ata_dummy_qc_issue,6628	.error_handler		= ata_dummy_error_handler,6629	.sched_eh		= ata_std_sched_eh,6630	.end_eh			= ata_std_end_eh,6631};6632EXPORT_SYMBOL_GPL(ata_dummy_port_ops);6633 6634const struct ata_port_info ata_dummy_port_info = {6635	.port_ops		= &ata_dummy_port_ops,6636};6637EXPORT_SYMBOL_GPL(ata_dummy_port_info);6638 6639void ata_print_version(const struct device *dev, const char *version)6640{6641	dev_printk(KERN_DEBUG, dev, "version %s\n", version);6642}6643EXPORT_SYMBOL(ata_print_version);6644 6645EXPORT_TRACEPOINT_SYMBOL_GPL(ata_tf_load);6646EXPORT_TRACEPOINT_SYMBOL_GPL(ata_exec_command);6647EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_setup);6648EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_start);6649EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_status);6650