ata.h 29.4 KB
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/*
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 *  Copyright 2003-2004 Red Hat, Inc.  All rights reserved.
 *  Copyright 2003-2004 Jeff Garzik
 *
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *
 *  libata documentation is available via 'make {ps|pdf}docs',
 *  as Documentation/DocBook/libata.*
 *
 *  Hardware documentation available from http://www.t13.org/
 *
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 */

#ifndef __LINUX_ATA_H__
#define __LINUX_ATA_H__

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#include <linux/kernel.h>
#include <linux/string.h>
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#include <linux/types.h>
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#include <asm/byteorder.h>
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/* defines only for the constants which don't work well as enums */
#define ATA_DMA_BOUNDARY	0xffffUL
#define ATA_DMA_MASK		0xffffffffULL

enum {
	/* various global constants */
	ATA_MAX_DEVICES		= 2,	/* per bus/port */
	ATA_MAX_PRD		= 256,	/* we could make these 256/256 */
	ATA_SECT_SIZE		= 512,
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	ATA_MAX_SECTORS_128	= 128,
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	ATA_MAX_SECTORS		= 256,
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	ATA_MAX_SECTORS_1024    = 1024,
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	ATA_MAX_SECTORS_LBA48	= 65535,/* TODO: 65536? */
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	ATA_MAX_SECTORS_TAPE	= 65535,
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	ATA_ID_WORDS		= 256,
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	ATA_ID_CONFIG		= 0,
	ATA_ID_CYLS		= 1,
	ATA_ID_HEADS		= 3,
	ATA_ID_SECTORS		= 6,
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	ATA_ID_SERNO		= 10,
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	ATA_ID_BUF_SIZE		= 21,
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	ATA_ID_FW_REV		= 23,
	ATA_ID_PROD		= 27,
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	ATA_ID_MAX_MULTSECT	= 47,
	ATA_ID_DWORD_IO		= 48,
	ATA_ID_CAPABILITY	= 49,
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	ATA_ID_OLD_PIO_MODES	= 51,
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	ATA_ID_OLD_DMA_MODES	= 52,
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	ATA_ID_FIELD_VALID	= 53,
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	ATA_ID_CUR_CYLS		= 54,
	ATA_ID_CUR_HEADS	= 55,
	ATA_ID_CUR_SECTORS	= 56,
	ATA_ID_MULTSECT		= 59,
	ATA_ID_LBA_CAPACITY	= 60,
	ATA_ID_SWDMA_MODES	= 62,
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	ATA_ID_MWDMA_MODES	= 63,
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	ATA_ID_PIO_MODES	= 64,
	ATA_ID_EIDE_DMA_MIN	= 65,
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	ATA_ID_EIDE_DMA_TIME	= 66,
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	ATA_ID_EIDE_PIO		= 67,
	ATA_ID_EIDE_PIO_IORDY	= 68,
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	ATA_ID_ADDITIONAL_SUPP	= 69,
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	ATA_ID_QUEUE_DEPTH	= 75,
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	ATA_ID_SATA_CAPABILITY	= 76,
	ATA_ID_SATA_CAPABILITY_2	= 77,
	ATA_ID_FEATURE_SUPP	= 78,
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	ATA_ID_MAJOR_VER	= 80,
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	ATA_ID_COMMAND_SET_1	= 82,
	ATA_ID_COMMAND_SET_2	= 83,
	ATA_ID_CFSSE		= 84,
	ATA_ID_CFS_ENABLE_1	= 85,
	ATA_ID_CFS_ENABLE_2	= 86,
	ATA_ID_CSF_DEFAULT	= 87,
	ATA_ID_UDMA_MODES	= 88,
	ATA_ID_HW_CONFIG	= 93,
	ATA_ID_SPG		= 98,
	ATA_ID_LBA_CAPACITY_2	= 100,
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	ATA_ID_SECTOR_SIZE	= 106,
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	ATA_ID_WWN		= 108,
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	ATA_ID_LOGICAL_SECTOR_SIZE	= 117,	/* and 118 */
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	ATA_ID_COMMAND_SET_3	= 119,
	ATA_ID_COMMAND_SET_4	= 120,
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	ATA_ID_LAST_LUN		= 126,
	ATA_ID_DLF		= 128,
	ATA_ID_CSFO		= 129,
	ATA_ID_CFA_POWER	= 160,
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	ATA_ID_CFA_KEY_MGMT	= 162,
	ATA_ID_CFA_MODES	= 163,
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	ATA_ID_DATA_SET_MGMT	= 169,
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	ATA_ID_ROT_SPEED	= 217,
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	ATA_ID_PIO4		= (1 << 1),

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	ATA_ID_SERNO_LEN	= 20,
	ATA_ID_FW_REV_LEN	= 8,
	ATA_ID_PROD_LEN		= 40,
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	ATA_ID_WWN_LEN		= 8,
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	ATA_PCI_CTL_OFS		= 2,
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	ATA_PIO0		= (1 << 0),
	ATA_PIO1		= ATA_PIO0 | (1 << 1),
	ATA_PIO2		= ATA_PIO1 | (1 << 2),
	ATA_PIO3		= ATA_PIO2 | (1 << 3),
	ATA_PIO4		= ATA_PIO3 | (1 << 4),
	ATA_PIO5		= ATA_PIO4 | (1 << 5),
	ATA_PIO6		= ATA_PIO5 | (1 << 6),

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	ATA_PIO4_ONLY		= (1 << 4),

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	ATA_SWDMA0		= (1 << 0),
	ATA_SWDMA1		= ATA_SWDMA0 | (1 << 1),
	ATA_SWDMA2		= ATA_SWDMA1 | (1 << 2),

	ATA_SWDMA2_ONLY		= (1 << 2),

	ATA_MWDMA0		= (1 << 0),
	ATA_MWDMA1		= ATA_MWDMA0 | (1 << 1),
	ATA_MWDMA2		= ATA_MWDMA1 | (1 << 2),
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	ATA_MWDMA3		= ATA_MWDMA2 | (1 << 3),
	ATA_MWDMA4		= ATA_MWDMA3 | (1 << 4),
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	ATA_MWDMA12_ONLY	= (1 << 1) | (1 << 2),
	ATA_MWDMA2_ONLY		= (1 << 2),

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	ATA_UDMA0		= (1 << 0),
	ATA_UDMA1		= ATA_UDMA0 | (1 << 1),
	ATA_UDMA2		= ATA_UDMA1 | (1 << 2),
	ATA_UDMA3		= ATA_UDMA2 | (1 << 3),
	ATA_UDMA4		= ATA_UDMA3 | (1 << 4),
	ATA_UDMA5		= ATA_UDMA4 | (1 << 5),
	ATA_UDMA6		= ATA_UDMA5 | (1 << 6),
	ATA_UDMA7		= ATA_UDMA6 | (1 << 7),
	/* ATA_UDMA7 is just for completeness... doesn't exist (yet?).  */

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	ATA_UDMA24_ONLY		= (1 << 2) | (1 << 4),

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	ATA_UDMA_MASK_40C	= ATA_UDMA2,	/* udma0-2 */

	/* DMA-related */
	ATA_PRD_SZ		= 8,
	ATA_PRD_TBL_SZ		= (ATA_MAX_PRD * ATA_PRD_SZ),
	ATA_PRD_EOT		= (1 << 31),	/* end-of-table flag */

	ATA_DMA_TABLE_OFS	= 4,
	ATA_DMA_STATUS		= 2,
	ATA_DMA_CMD		= 0,
	ATA_DMA_WR		= (1 << 3),
	ATA_DMA_START		= (1 << 0),
	ATA_DMA_INTR		= (1 << 2),
	ATA_DMA_ERR		= (1 << 1),
	ATA_DMA_ACTIVE		= (1 << 0),

	/* bits in ATA command block registers */
	ATA_HOB			= (1 << 7),	/* LBA48 selector */
	ATA_NIEN		= (1 << 1),	/* disable-irq flag */
	ATA_LBA			= (1 << 6),	/* LBA28 selector */
	ATA_DEV1		= (1 << 4),	/* Select Device 1 (slave) */
	ATA_DEVICE_OBS		= (1 << 7) | (1 << 5), /* obs bits in dev reg */
	ATA_DEVCTL_OBS		= (1 << 3),	/* obsolete bit in devctl reg */
	ATA_BUSY		= (1 << 7),	/* BSY status bit */
	ATA_DRDY		= (1 << 6),	/* device ready */
	ATA_DF			= (1 << 5),	/* device fault */
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	ATA_DSC			= (1 << 4),	/* drive seek complete */
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	ATA_DRQ			= (1 << 3),	/* data request i/o */
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	ATA_CORR		= (1 << 2),	/* corrected data error */
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	ATA_SENSE		= (1 << 1),	/* sense code available */
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	ATA_ERR			= (1 << 0),	/* have an error */
	ATA_SRST		= (1 << 2),	/* software reset */
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	ATA_ICRC		= (1 << 7),	/* interface CRC error */
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	ATA_BBK			= ATA_ICRC,	/* pre-EIDE: block marked bad */
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	ATA_UNC			= (1 << 6),	/* uncorrectable media error */
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	ATA_MC			= (1 << 5),	/* media changed */
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	ATA_IDNF		= (1 << 4),	/* ID not found */
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	ATA_MCR			= (1 << 3),	/* media change requested */
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	ATA_ABORTED		= (1 << 2),	/* command aborted */
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	ATA_TRK0NF		= (1 << 1),	/* track 0 not found */
	ATA_AMNF		= (1 << 0),	/* address mark not found */
	ATAPI_LFS		= 0xF0,		/* last failed sense */
	ATAPI_EOM		= ATA_TRK0NF,	/* end of media */
	ATAPI_ILI		= ATA_AMNF,	/* illegal length indication */
	ATAPI_IO		= (1 << 1),
	ATAPI_COD		= (1 << 0),
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	/* ATA command block registers */
	ATA_REG_DATA		= 0x00,
	ATA_REG_ERR		= 0x01,
	ATA_REG_NSECT		= 0x02,
	ATA_REG_LBAL		= 0x03,
	ATA_REG_LBAM		= 0x04,
	ATA_REG_LBAH		= 0x05,
	ATA_REG_DEVICE		= 0x06,
	ATA_REG_STATUS		= 0x07,

	ATA_REG_FEATURE		= ATA_REG_ERR, /* and their aliases */
	ATA_REG_CMD		= ATA_REG_STATUS,
	ATA_REG_BYTEL		= ATA_REG_LBAM,
	ATA_REG_BYTEH		= ATA_REG_LBAH,
	ATA_REG_DEVSEL		= ATA_REG_DEVICE,
	ATA_REG_IRQ		= ATA_REG_NSECT,

	/* ATA device commands */
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	ATA_CMD_DEV_RESET	= 0x08, /* ATAPI device reset */
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	ATA_CMD_CHK_POWER	= 0xE5, /* check power mode */
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	ATA_CMD_STANDBY		= 0xE2, /* place in standby power mode */
	ATA_CMD_IDLE		= 0xE3, /* place in idle power mode */
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	ATA_CMD_EDD		= 0x90,	/* execute device diagnostic */
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	ATA_CMD_DOWNLOAD_MICRO  = 0x92,
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	ATA_CMD_DOWNLOAD_MICRO_DMA = 0x93,
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	ATA_CMD_NOP		= 0x00,
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	ATA_CMD_FLUSH		= 0xE7,
	ATA_CMD_FLUSH_EXT	= 0xEA,
	ATA_CMD_ID_ATA		= 0xEC,
	ATA_CMD_ID_ATAPI	= 0xA1,
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	ATA_CMD_SERVICE		= 0xA2,
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	ATA_CMD_READ		= 0xC8,
	ATA_CMD_READ_EXT	= 0x25,
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	ATA_CMD_READ_QUEUED	= 0x26,
	ATA_CMD_READ_STREAM_EXT	= 0x2B,
	ATA_CMD_READ_STREAM_DMA_EXT = 0x2A,
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	ATA_CMD_WRITE		= 0xCA,
	ATA_CMD_WRITE_EXT	= 0x35,
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	ATA_CMD_WRITE_QUEUED	= 0x36,
	ATA_CMD_WRITE_STREAM_EXT = 0x3B,
	ATA_CMD_WRITE_STREAM_DMA_EXT = 0x3A,
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	ATA_CMD_WRITE_FUA_EXT	= 0x3D,
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	ATA_CMD_WRITE_QUEUED_FUA_EXT = 0x3E,
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	ATA_CMD_FPDMA_READ	= 0x60,
	ATA_CMD_FPDMA_WRITE	= 0x61,
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	ATA_CMD_FPDMA_SEND	= 0x64,
	ATA_CMD_FPDMA_RECV	= 0x65,
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	ATA_CMD_PIO_READ	= 0x20,
	ATA_CMD_PIO_READ_EXT	= 0x24,
	ATA_CMD_PIO_WRITE	= 0x30,
	ATA_CMD_PIO_WRITE_EXT	= 0x34,
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	ATA_CMD_READ_MULTI	= 0xC4,
	ATA_CMD_READ_MULTI_EXT	= 0x29,
	ATA_CMD_WRITE_MULTI	= 0xC5,
	ATA_CMD_WRITE_MULTI_EXT	= 0x39,
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	ATA_CMD_WRITE_MULTI_FUA_EXT = 0xCE,
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	ATA_CMD_SET_FEATURES	= 0xEF,
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	ATA_CMD_SET_MULTI	= 0xC6,
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	ATA_CMD_PACKET		= 0xA0,
	ATA_CMD_VERIFY		= 0x40,
	ATA_CMD_VERIFY_EXT	= 0x42,
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	ATA_CMD_WRITE_UNCORR_EXT = 0x45,
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	ATA_CMD_STANDBYNOW1	= 0xE0,
	ATA_CMD_IDLEIMMEDIATE	= 0xE1,
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	ATA_CMD_SLEEP		= 0xE6,
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	ATA_CMD_INIT_DEV_PARAMS	= 0x91,
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	ATA_CMD_READ_NATIVE_MAX	= 0xF8,
	ATA_CMD_READ_NATIVE_MAX_EXT = 0x27,
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	ATA_CMD_SET_MAX		= 0xF9,
	ATA_CMD_SET_MAX_EXT	= 0x37,
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	ATA_CMD_READ_LOG_EXT	= 0x2F,
	ATA_CMD_WRITE_LOG_EXT	= 0x3F,
	ATA_CMD_READ_LOG_DMA_EXT = 0x47,
	ATA_CMD_WRITE_LOG_DMA_EXT = 0x57,
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	ATA_CMD_TRUSTED_NONDATA	= 0x5B,
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	ATA_CMD_TRUSTED_RCV	= 0x5C,
	ATA_CMD_TRUSTED_RCV_DMA = 0x5D,
	ATA_CMD_TRUSTED_SND	= 0x5E,
	ATA_CMD_TRUSTED_SND_DMA = 0x5F,
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	ATA_CMD_PMP_READ	= 0xE4,
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	ATA_CMD_PMP_READ_DMA	= 0xE9,
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	ATA_CMD_PMP_WRITE	= 0xE8,
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	ATA_CMD_PMP_WRITE_DMA	= 0xEB,
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	ATA_CMD_CONF_OVERLAY	= 0xB1,
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	ATA_CMD_SEC_SET_PASS	= 0xF1,
	ATA_CMD_SEC_UNLOCK	= 0xF2,
	ATA_CMD_SEC_ERASE_PREP	= 0xF3,
	ATA_CMD_SEC_ERASE_UNIT	= 0xF4,
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	ATA_CMD_SEC_FREEZE_LOCK	= 0xF5,
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	ATA_CMD_SEC_DISABLE_PASS = 0xF6,
	ATA_CMD_CONFIG_STREAM	= 0x51,
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	ATA_CMD_SMART		= 0xB0,
	ATA_CMD_MEDIA_LOCK	= 0xDE,
	ATA_CMD_MEDIA_UNLOCK	= 0xDF,
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	ATA_CMD_DSM		= 0x06,
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	ATA_CMD_CHK_MED_CRD_TYP = 0xD1,
	ATA_CMD_CFA_REQ_EXT_ERR = 0x03,
	ATA_CMD_CFA_WRITE_NE	= 0x38,
	ATA_CMD_CFA_TRANS_SECT	= 0x87,
	ATA_CMD_CFA_ERASE	= 0xC0,
	ATA_CMD_CFA_WRITE_MULT_NE = 0xCD,
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	ATA_CMD_REQ_SENSE_DATA  = 0x0B,
	ATA_CMD_SANITIZE_DEVICE = 0xB4,

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	/* marked obsolete in the ATA/ATAPI-7 spec */
	ATA_CMD_RESTORE		= 0x10,
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	/* Subcmds for ATA_CMD_FPDMA_SEND */
	ATA_SUBCMD_FPDMA_SEND_DSM            = 0x00,
	ATA_SUBCMD_FPDMA_SEND_WR_LOG_DMA_EXT = 0x02,

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	/* READ_LOG_EXT pages */
	ATA_LOG_SATA_NCQ	= 0x10,
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	ATA_LOG_NCQ_SEND_RECV	  = 0x13,
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	ATA_LOG_SATA_ID_DEV_DATA  = 0x30,
	ATA_LOG_SATA_SETTINGS	  = 0x08,
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	ATA_LOG_DEVSLP_OFFSET	  = 0x30,
	ATA_LOG_DEVSLP_SIZE	  = 0x08,
	ATA_LOG_DEVSLP_MDAT	  = 0x00,
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	ATA_LOG_DEVSLP_MDAT_MASK  = 0x1F,
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	ATA_LOG_DEVSLP_DETO	  = 0x01,
	ATA_LOG_DEVSLP_VALID	  = 0x07,
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	ATA_LOG_DEVSLP_VALID_MASK = 0x80,
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	/* NCQ send and receive log */
	ATA_LOG_NCQ_SEND_RECV_SUBCMDS_OFFSET	= 0x00,
	ATA_LOG_NCQ_SEND_RECV_SUBCMDS_DSM	= (1 << 0),
	ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET	= 0x04,
	ATA_LOG_NCQ_SEND_RECV_DSM_TRIM		= (1 << 0),
	ATA_LOG_NCQ_SEND_RECV_RD_LOG_OFFSET	= 0x08,
	ATA_LOG_NCQ_SEND_RECV_WR_LOG_OFFSET	= 0x0C,
	ATA_LOG_NCQ_SEND_RECV_SIZE		= 0x10,

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	/* READ/WRITE LONG (obsolete) */
	ATA_CMD_READ_LONG	= 0x22,
	ATA_CMD_READ_LONG_ONCE	= 0x23,
	ATA_CMD_WRITE_LONG	= 0x32,
	ATA_CMD_WRITE_LONG_ONCE	= 0x33,

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	/* SETFEATURES stuff */
	SETFEATURES_XFER	= 0x03,
	XFER_UDMA_7		= 0x47,
	XFER_UDMA_6		= 0x46,
	XFER_UDMA_5		= 0x45,
	XFER_UDMA_4		= 0x44,
	XFER_UDMA_3		= 0x43,
	XFER_UDMA_2		= 0x42,
	XFER_UDMA_1		= 0x41,
	XFER_UDMA_0		= 0x40,
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	XFER_MW_DMA_4		= 0x24,	/* CFA only */
	XFER_MW_DMA_3		= 0x23,	/* CFA only */
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	XFER_MW_DMA_2		= 0x22,
	XFER_MW_DMA_1		= 0x21,
	XFER_MW_DMA_0		= 0x20,
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	XFER_SW_DMA_2		= 0x12,
	XFER_SW_DMA_1		= 0x11,
	XFER_SW_DMA_0		= 0x10,
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	XFER_PIO_6		= 0x0E,	/* CFA only */
	XFER_PIO_5		= 0x0D,	/* CFA only */
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	XFER_PIO_4		= 0x0C,
	XFER_PIO_3		= 0x0B,
	XFER_PIO_2		= 0x0A,
	XFER_PIO_1		= 0x09,
	XFER_PIO_0		= 0x08,
	XFER_PIO_SLOW		= 0x00,

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	SETFEATURES_WC_ON	= 0x02, /* Enable write cache */
	SETFEATURES_WC_OFF	= 0x82, /* Disable write cache */

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	/* Enable/Disable Automatic Acoustic Management */
	SETFEATURES_AAM_ON	= 0x42,
	SETFEATURES_AAM_OFF	= 0xC2,

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	SETFEATURES_SPINUP	= 0x07, /* Spin-up drive */

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	SETFEATURES_SATA_ENABLE = 0x10, /* Enable use of SATA feature */
	SETFEATURES_SATA_DISABLE = 0x90, /* Disable use of SATA feature */

	/* SETFEATURE Sector counts for SATA features */
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	SATA_FPDMA_OFFSET	= 0x01,	/* FPDMA non-zero buffer offsets */
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	SATA_FPDMA_AA		= 0x02, /* FPDMA Setup FIS Auto-Activate */
	SATA_DIPM		= 0x03,	/* Device Initiated Power Management */
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	SATA_FPDMA_IN_ORDER	= 0x04,	/* FPDMA in-order data delivery */
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	SATA_AN			= 0x05,	/* Asynchronous Notification */
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	SATA_SSP		= 0x06,	/* Software Settings Preservation */
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	SATA_DEVSLP		= 0x09,	/* Device Sleep */
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	/* feature values for SET_MAX */
	ATA_SET_MAX_ADDR	= 0x00,
	ATA_SET_MAX_PASSWD	= 0x01,
	ATA_SET_MAX_LOCK	= 0x02,
	ATA_SET_MAX_UNLOCK	= 0x03,
	ATA_SET_MAX_FREEZE_LOCK	= 0x04,

	/* feature values for DEVICE CONFIGURATION OVERLAY */
	ATA_DCO_RESTORE		= 0xC0,
	ATA_DCO_FREEZE_LOCK	= 0xC1,
	ATA_DCO_IDENTIFY	= 0xC2,
	ATA_DCO_SET		= 0xC3,

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	/* feature values for SMART */
	ATA_SMART_ENABLE	= 0xD8,
	ATA_SMART_READ_VALUES	= 0xD0,
	ATA_SMART_READ_THRESHOLDS = 0xD1,

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	/* feature values for Data Set Management */
	ATA_DSM_TRIM		= 0x01,

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	/* password used in LBA Mid / LBA High for executing SMART commands */
	ATA_SMART_LBAM_PASS	= 0x4F,
	ATA_SMART_LBAH_PASS	= 0xC2,

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	/* ATAPI stuff */
	ATAPI_PKT_DMA		= (1 << 0),
	ATAPI_DMADIR		= (1 << 2),	/* ATAPI data dir:
						   0=to device, 1=to host */
	ATAPI_CDB_LEN		= 16,

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	/* PMP stuff */
	SATA_PMP_MAX_PORTS	= 15,
	SATA_PMP_CTRL_PORT	= 15,

	SATA_PMP_GSCR_DWORDS	= 128,
	SATA_PMP_GSCR_PROD_ID	= 0,
	SATA_PMP_GSCR_REV	= 1,
	SATA_PMP_GSCR_PORT_INFO	= 2,
	SATA_PMP_GSCR_ERROR	= 32,
	SATA_PMP_GSCR_ERROR_EN	= 33,
	SATA_PMP_GSCR_FEAT	= 64,
	SATA_PMP_GSCR_FEAT_EN	= 96,

	SATA_PMP_PSCR_STATUS	= 0,
	SATA_PMP_PSCR_ERROR	= 1,
	SATA_PMP_PSCR_CONTROL	= 2,

	SATA_PMP_FEAT_BIST	= (1 << 0),
	SATA_PMP_FEAT_PMREQ	= (1 << 1),
	SATA_PMP_FEAT_DYNSSC	= (1 << 2),
	SATA_PMP_FEAT_NOTIFY	= (1 << 3),

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	/* cable types */
	ATA_CBL_NONE		= 0,
	ATA_CBL_PATA40		= 1,
	ATA_CBL_PATA80		= 2,
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	ATA_CBL_PATA40_SHORT	= 3,	/* 40 wire cable to high UDMA spec */
	ATA_CBL_PATA_UNK	= 4,	/* don't know, maybe 80c? */
	ATA_CBL_PATA_IGN	= 5,	/* don't know, ignore cable handling */
	ATA_CBL_SATA		= 6,
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	/* SATA Status and Control Registers */
	SCR_STATUS		= 0,
	SCR_ERROR		= 1,
	SCR_CONTROL		= 2,
	SCR_ACTIVE		= 3,
	SCR_NOTIFICATION	= 4,

457 458 459 460 461 462 463 464
	/* SError bits */
	SERR_DATA_RECOVERED	= (1 << 0), /* recovered data error */
	SERR_COMM_RECOVERED	= (1 << 1), /* recovered comm failure */
	SERR_DATA		= (1 << 8), /* unrecovered data error */
	SERR_PERSISTENT		= (1 << 9), /* persistent data/comm error */
	SERR_PROTOCOL		= (1 << 10), /* protocol violation */
	SERR_INTERNAL		= (1 << 11), /* host internal error */
	SERR_PHYRDY_CHG		= (1 << 16), /* PHY RDY changed */
465 466 467 468 469 470 471 472 473
	SERR_PHY_INT_ERR	= (1 << 17), /* PHY internal error */
	SERR_COMM_WAKE		= (1 << 18), /* Comm wake */
	SERR_10B_8B_ERR		= (1 << 19), /* 10b to 8b decode error */
	SERR_DISPARITY		= (1 << 20), /* Disparity */
	SERR_CRC		= (1 << 21), /* CRC error */
	SERR_HANDSHAKE		= (1 << 22), /* Handshake error */
	SERR_LINK_SEQ_ERR	= (1 << 23), /* Link sequence error */
	SERR_TRANS_ST_ERROR	= (1 << 24), /* Transport state trans. error */
	SERR_UNRECOG_FIS	= (1 << 25), /* Unrecognized FIS */
474
	SERR_DEV_XCHG		= (1 << 26), /* device exchanged */
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};

enum ata_tf_protocols {
	/* ATA taskfile protocols */
	ATA_PROT_UNKNOWN,	/* unknown/invalid */
	ATA_PROT_NODATA,	/* no data */
481
	ATA_PROT_PIO,		/* PIO data xfer */
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	ATA_PROT_DMA,		/* DMA */
483
	ATA_PROT_NCQ,		/* NCQ */
484 485 486
	ATAPI_PROT_NODATA,	/* packet command, no data */
	ATAPI_PROT_PIO,		/* packet command, PIO data xfer*/
	ATAPI_PROT_DMA,		/* packet command with special DMA sauce */
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};

enum ata_ioctls {
	ATA_IOC_GET_IO32	= 0x309,
	ATA_IOC_SET_IO32	= 0x324,
};

/* core structures */

496
struct ata_bmdma_prd {
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	__le32			addr;
	__le32			flags_len;
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};

501 502 503
/*
 * id tests
 */
504 505 506
#define ata_id_is_ata(id)	(((id)[ATA_ID_CONFIG] & (1 << 15)) == 0)
#define ata_id_has_lba(id)	((id)[ATA_ID_CAPABILITY] & (1 << 9))
#define ata_id_has_dma(id)	((id)[ATA_ID_CAPABILITY] & (1 << 8))
507
#define ata_id_has_ncq(id)	((id)[ATA_ID_SATA_CAPABILITY] & (1 << 8))
508
#define ata_id_queue_depth(id)	(((id)[ATA_ID_QUEUE_DEPTH] & 0x1f) + 1)
509
#define ata_id_removable(id)	((id)[ATA_ID_CONFIG] & (1 << 7))
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#define ata_id_has_atapi_AN(id)	\
511 512 513
	((((id)[ATA_ID_SATA_CAPABILITY] != 0x0000) && \
	  ((id)[ATA_ID_SATA_CAPABILITY] != 0xffff)) && \
	 ((id)[ATA_ID_FEATURE_SUPP] & (1 << 5)))
514
#define ata_id_has_fpdma_aa(id)	\
515 516 517
	((((id)[ATA_ID_SATA_CAPABILITY] != 0x0000) && \
	  ((id)[ATA_ID_SATA_CAPABILITY] != 0xffff)) && \
	 ((id)[ATA_ID_FEATURE_SUPP] & (1 << 2)))
518 519
#define ata_id_iordy_disable(id) ((id)[ATA_ID_CAPABILITY] & (1 << 10))
#define ata_id_has_iordy(id) ((id)[ATA_ID_CAPABILITY] & (1 << 11))
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#define ata_id_u32(id,n)	\
	(((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
#define ata_id_u64(id,n)	\
	( ((u64) (id)[(n) + 3] << 48) |	\
	  ((u64) (id)[(n) + 2] << 32) |	\
	  ((u64) (id)[(n) + 1] << 16) |	\
	  ((u64) (id)[(n) + 0]) )

528
#define ata_id_cdb_intr(id)	(((id)[ATA_ID_CONFIG] & 0x60) == 0x20)
529
#define ata_id_has_da(id)	((id)[ATA_ID_SATA_CAPABILITY_2] & (1 << 4))
530
#define ata_id_has_devslp(id)	((id)[ATA_ID_FEATURE_SUPP] & (1 << 8))
531

532 533
static inline bool ata_id_has_hipm(const u16 *id)
{
534
	u16 val = id[ATA_ID_SATA_CAPABILITY];
535 536 537 538 539 540 541 542 543

	if (val == 0 || val == 0xffff)
		return false;

	return val & (1 << 9);
}

static inline bool ata_id_has_dipm(const u16 *id)
{
544
	u16 val = id[ATA_ID_FEATURE_SUPP];
545 546 547 548 549 550 551

	if (val == 0 || val == 0xffff)
		return false;

	return val & (1 << 3);
}

552

553
static inline bool ata_id_has_fua(const u16 *id)
554
{
555
	if ((id[ATA_ID_CFSSE] & 0xC000) != 0x4000)
556
		return false;
557
	return id[ATA_ID_CFSSE] & (1 << 6);
558 559
}

560
static inline bool ata_id_has_flush(const u16 *id)
561
{
562
	if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
563
		return false;
564
	return id[ATA_ID_COMMAND_SET_2] & (1 << 12);
565 566
}

567
static inline bool ata_id_flush_enabled(const u16 *id)
568 569
{
	if (ata_id_has_flush(id) == 0)
570
		return false;
571
	if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
572
		return false;
573 574 575
	return id[ATA_ID_CFS_ENABLE_2] & (1 << 12);
}

576
static inline bool ata_id_has_flush_ext(const u16 *id)
577
{
578
	if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
579
		return false;
580
	return id[ATA_ID_COMMAND_SET_2] & (1 << 13);
581 582
}

583
static inline bool ata_id_flush_ext_enabled(const u16 *id)
584 585
{
	if (ata_id_has_flush_ext(id) == 0)
586
		return false;
587
	if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
588
		return false;
589 590 591 592 593 594 595
	/*
	 * some Maxtor disks have bit 13 defined incorrectly
	 * so check bit 10 too
	 */
	return (id[ATA_ID_CFS_ENABLE_2] & 0x2400) == 0x2400;
}

596
static inline u32 ata_id_logical_sector_size(const u16 *id)
597
{
598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616
	/* T13/1699-D Revision 6a, Sep 6, 2008. Page 128.
	 * IDENTIFY DEVICE data, word 117-118.
	 * 0xd000 ignores bit 13 (logical:physical > 1)
	 */
	if ((id[ATA_ID_SECTOR_SIZE] & 0xd000) == 0x5000)
		return (((id[ATA_ID_LOGICAL_SECTOR_SIZE+1] << 16)
			 + id[ATA_ID_LOGICAL_SECTOR_SIZE]) * sizeof(u16)) ;
	return ATA_SECT_SIZE;
}

static inline u8 ata_id_log2_per_physical_sector(const u16 *id)
{
	/* T13/1699-D Revision 6a, Sep 6, 2008. Page 128.
	 * IDENTIFY DEVICE data, word 106.
	 * 0xe000 ignores bit 12 (logical sector > 512 bytes)
	 */
	if ((id[ATA_ID_SECTOR_SIZE] & 0xe000) == 0x6000)
		return (id[ATA_ID_SECTOR_SIZE] & 0xf);
	return 0;
617 618
}

619 620 621 622 623 624 625 626 627 628 629
/* Offset of logical sectors relative to physical sectors.
 *
 * If device has more than one logical sector per physical sector
 * (aka 512 byte emulation), vendors might offset the "sector 0" address
 * so sector 63 is "naturally aligned" - e.g. FAT partition table.
 * This avoids Read/Mod/Write penalties when using FAT partition table
 * and updating "well aligned" (FS perspective) physical sectors on every
 * transaction.
 */
static inline u16 ata_id_logical_sector_offset(const u16 *id,
	 u8 log2_per_phys)
630
{
631 632 633 634 635 636 637 638
	u16 word_209 = id[209];

	if ((log2_per_phys > 1) && (word_209 & 0xc000) == 0x4000) {
		u16 first = word_209 & 0x3fff;
		if (first > 0)
			return (1 << log2_per_phys) - first;
	}
	return 0;
639 640
}

641
static inline bool ata_id_has_lba48(const u16 *id)
642
{
643
	if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
644
		return false;
645
	if (!ata_id_u64(id, ATA_ID_LBA_CAPACITY_2))
646
		return false;
647
	return id[ATA_ID_COMMAND_SET_2] & (1 << 10);
648 649
}

650
static inline bool ata_id_lba48_enabled(const u16 *id)
651 652
{
	if (ata_id_has_lba48(id) == 0)
653
		return false;
654
	if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
655
		return false;
656 657 658
	return id[ATA_ID_CFS_ENABLE_2] & (1 << 10);
}

659
static inline bool ata_id_hpa_enabled(const u16 *id)
660 661
{
	/* Yes children, word 83 valid bits cover word 82 data */
662
	if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
663
		return false;
664
	/* And 87 covers 85-87 */
665
	if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
666
		return false;
667
	/* Check command sets enabled as well as supported */
668
	if ((id[ATA_ID_CFS_ENABLE_1] & (1 << 10)) == 0)
669
		return false;
670
	return id[ATA_ID_COMMAND_SET_1] & (1 << 10);
671 672
}

673
static inline bool ata_id_has_wcache(const u16 *id)
674 675
{
	/* Yes children, word 83 valid bits cover word 82 data */
676
	if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
677
		return false;
678
	return id[ATA_ID_COMMAND_SET_1] & (1 << 5);
679 680
}

681
static inline bool ata_id_has_pm(const u16 *id)
682
{
683
	if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
684
		return false;
685
	return id[ATA_ID_COMMAND_SET_1] & (1 << 3);
686 687
}

688
static inline bool ata_id_rahead_enabled(const u16 *id)
689
{
690
	if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
691
		return false;
692
	return id[ATA_ID_CFS_ENABLE_1] & (1 << 6);
693 694
}

695
static inline bool ata_id_wcache_enabled(const u16 *id)
696
{
697
	if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
698
		return false;
699
	return id[ATA_ID_CFS_ENABLE_1] & (1 << 5);
700 701
}

702 703
static inline bool ata_id_has_read_log_dma_ext(const u16 *id)
{
704
	/* Word 86 must have bit 15 set */
705 706
	if (!(id[ATA_ID_CFS_ENABLE_2] & (1 << 15)))
		return false;
707 708 709 710 711 712 713 714 715 716

	/* READ LOG DMA EXT support can be signaled either from word 119
	 * or from word 120. The format is the same for both words: Bit
	 * 15 must be cleared, bit 14 set and bit 3 set.
	 */
	if ((id[ATA_ID_COMMAND_SET_3] & 0xC008) == 0x4008 ||
	    (id[ATA_ID_COMMAND_SET_4] & 0xC008) == 0x4008)
		return true;

	return false;
717 718
}

719 720 721 722 723 724 725 726 727 728
/**
 *	ata_id_major_version	-	get ATA level of drive
 *	@id: Identify data
 *
 *	Caveats:
 *		ATA-1 considers identify optional
 *		ATA-2 introduces mandatory identify
 *		ATA-3 introduces word 80 and accurate reporting
 *
 *	The practical impact of this is that ata_id_major_version cannot
729
 *	reliably report on drives below ATA3.
730 731
 */

732 733 734 735
static inline unsigned int ata_id_major_version(const u16 *id)
{
	unsigned int mver;

736 737 738
	if (id[ATA_ID_MAJOR_VER] == 0xFFFF)
		return 0;

739 740 741 742 743 744
	for (mver = 14; mver >= 1; mver--)
		if (id[ATA_ID_MAJOR_VER] & (1 << mver))
			break;
	return mver;
}

745
static inline bool ata_id_is_sata(const u16 *id)
746
{
747 748 749 750 751 752 753
	/*
	 * See if word 93 is 0 AND drive is at least ATA-5 compatible
	 * verifying that word 80 by casting it to a signed type --
	 * this trick allows us to filter out the reserved values of
	 * 0x0000 and 0xffff along with the earlier ATA revisions...
	 */
	if (id[ATA_ID_HW_CONFIG] == 0 && (short)id[ATA_ID_MAJOR_VER] >= 0x0020)
754 755
		return true;
	return false;
756 757
}

758
static inline bool ata_id_has_tpm(const u16 *id)
759 760 761
{
	/* The TPM bits are only valid on ATA8 */
	if (ata_id_major_version(id) < 8)
762
		return false;
763
	if ((id[48] & 0xC000) != 0x4000)
764
		return false;
765 766 767
	return id[48] & (1 << 0);
}

768
static inline bool ata_id_has_dword_io(const u16 *id)
769 770 771
{
	/* ATA 8 reuses this flag for "trusted" computing */
	if (ata_id_major_version(id) > 7)
772 773
		return false;
	return id[ATA_ID_DWORD_IO] & (1 << 0);
774 775
}

776
static inline bool ata_id_has_unload(const u16 *id)
777 778 779 780
{
	if (ata_id_major_version(id) >= 7 &&
	    (id[ATA_ID_CFSSE] & 0xC000) == 0x4000 &&
	    id[ATA_ID_CFSSE] & (1 << 13))
781 782
		return true;
	return false;
783 784
}

785 786 787 788 789
static inline bool ata_id_has_wwn(const u16 *id)
{
	return (id[ATA_ID_CSF_DEFAULT] & 0xC100) == 0x4100;
}

790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817
static inline int ata_id_form_factor(const u16 *id)
{
	u16 val = id[168];

	if (ata_id_major_version(id) < 7 || val == 0 || val == 0xffff)
		return 0;

	val &= 0xf;

	if (val > 5)
		return 0;

	return val;
}

static inline int ata_id_rotation_rate(const u16 *id)
{
	u16 val = id[217];

	if (ata_id_major_version(id) < 7 || val == 0 || val == 0xffff)
		return 0;

	if (val > 1 && val < 0x401)
		return 0;

	return val;
}

818 819 820 821 822
static inline bool ata_id_has_ncq_send_and_recv(const u16 *id)
{
	return id[ATA_ID_SATA_CAPABILITY_2] & BIT(6);
}

823
static inline bool ata_id_has_trim(const u16 *id)
824 825 826
{
	if (ata_id_major_version(id) >= 7 &&
	    (id[ATA_ID_DATA_SET_MGMT] & 1))
827 828
		return true;
	return false;
829 830
}

831
static inline bool ata_id_has_zero_after_trim(const u16 *id)
832 833 834 835
{
	/* DSM supported, deterministic read, and read zero after trim set */
	if (ata_id_has_trim(id) &&
	    (id[ATA_ID_ADDITIONAL_SUPP] & 0x4020) == 0x4020)
836
		return true;
837

838
	return false;
839 840
}

841
static inline bool ata_id_current_chs_valid(const u16 *id)
842
{
843 844
	/* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command
	   has not been issued to the device then the values of
845 846 847 848 849 850
	   id[ATA_ID_CUR_CYLS] to id[ATA_ID_CUR_SECTORS] are vendor specific. */
	return (id[ATA_ID_FIELD_VALID] & 1) && /* Current translation valid */
		id[ATA_ID_CUR_CYLS] &&  /* cylinders in current translation */
		id[ATA_ID_CUR_HEADS] &&  /* heads in current translation */
		id[ATA_ID_CUR_HEADS] <= 16 &&
		id[ATA_ID_CUR_SECTORS];    /* sectors in current translation */
851 852
}

853
static inline bool ata_id_is_cfa(const u16 *id)
854
{
855 856
	if ((id[ATA_ID_CONFIG] == 0x848A) ||	/* Traditional CF */
	    (id[ATA_ID_CONFIG] == 0x844A))	/* Delkin Devices CF */
857
		return true;
858 859 860 861 862 863 864 865
	/*
	 * CF specs don't require specific value in the word 0 anymore and yet
	 * they forbid to report the ATA version in the word 80 and require the
	 * CFA feature set support to be indicated in the word 83 in this case.
	 * Unfortunately, some cards only follow either of this requirements,
	 * and while those that don't indicate CFA feature support need some
	 * sort of quirk list, it seems impractical for the ones that do...
	 */
866
	return (id[ATA_ID_COMMAND_SET_2] & 0xC004) == 0x4004;
867 868
}

869
static inline bool ata_id_is_ssd(const u16 *id)
870 871 872 873
{
	return id[ATA_ID_ROT_SPEED] == 0x01;
}

874
static inline bool ata_id_pio_need_iordy(const u16 *id, const u8 pio)
875 876 877
{
	/* CF spec. r4.1 Table 22 says no IORDY on PIO5 and PIO6. */
	if (pio > 4 && ata_id_is_cfa(id))
878
		return false;
879 880
	/* For PIO3 and higher it is mandatory. */
	if (pio > 2)
881
		return true;
882
	/* Turn it on when possible. */
883
	return ata_id_has_iordy(id);
884 885
}

886
static inline bool ata_drive_40wire(const u16 *dev_id)
887
{
888
	if (ata_id_is_sata(dev_id))
889
		return false;	/* SATA */
890
	if ((dev_id[ATA_ID_HW_CONFIG] & 0xE000) == 0x6000)
891 892
		return false;	/* 80 wire */
	return true;
893 894
}

895
static inline bool ata_drive_40wire_relaxed(const u16 *dev_id)
896
{
897
	if ((dev_id[ATA_ID_HW_CONFIG] & 0x2000) == 0x2000)
898 899
		return false;	/* 80 wire */
	return true;
900 901
}

902
static inline int atapi_cdb_len(const u16 *dev_id)
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{
904
	u16 tmp = dev_id[ATA_ID_CONFIG] & 0x3;
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905 906 907 908 909 910 911
	switch (tmp) {
	case 0:		return 12;
	case 1:		return 16;
	default:	return -1;
	}
}

912
static inline int atapi_command_packet_set(const u16 *dev_id)
913
{
914
	return (dev_id[ATA_ID_CONFIG] >> 8) & 0x1f;
915 916
}

917
static inline bool atapi_id_dmadir(const u16 *dev_id)
918 919 920 921
{
	return ata_id_major_version(dev_id) >= 7 && (dev_id[62] & 0x8000);
}

922 923 924 925 926 927 928 929
/*
 * ata_id_is_lba_capacity_ok() performs a sanity check on
 * the claimed LBA capacity value for the device.
 *
 * Returns 1 if LBA capacity looks sensible, 0 otherwise.
 *
 * It is called only once for each device.
 */
930
static inline bool ata_id_is_lba_capacity_ok(u16 *id)
931 932 933 934 935
{
	unsigned long lba_sects, chs_sects, head, tail;

	/* No non-LBA info .. so valid! */
	if (id[ATA_ID_CYLS] == 0)
936
		return true;
937 938 939 940 941 942 943 944 945 946 947 948 949 950

	lba_sects = ata_id_u32(id, ATA_ID_LBA_CAPACITY);

	/*
	 * The ATA spec tells large drives to return
	 * C/H/S = 16383/16/63 independent of their size.
	 * Some drives can be jumpered to use 15 heads instead of 16.
	 * Some drives can be jumpered to use 4092 cyls instead of 16383.
	 */
	if ((id[ATA_ID_CYLS] == 16383 ||
	     (id[ATA_ID_CYLS] == 4092 && id[ATA_ID_CUR_CYLS] == 16383)) &&
	    id[ATA_ID_SECTORS] == 63 &&
	    (id[ATA_ID_HEADS] == 15 || id[ATA_ID_HEADS] == 16) &&
	    (lba_sects >= 16383 * 63 * id[ATA_ID_HEADS]))
951
		return true;
952 953 954 955 956

	chs_sects = id[ATA_ID_CYLS] * id[ATA_ID_HEADS] * id[ATA_ID_SECTORS];

	/* perform a rough sanity check on lba_sects: within 10% is OK */
	if (lba_sects - chs_sects < chs_sects/10)
957
		return true;
958 959 960 961 962 963 964 965

	/* some drives have the word order reversed */
	head = (lba_sects >> 16) & 0xffff;
	tail = lba_sects & 0xffff;
	lba_sects = head | (tail << 16);

	if (lba_sects - chs_sects < chs_sects/10) {
		*(__le32 *)&id[ATA_ID_LBA_CAPACITY] = __cpu_to_le32(lba_sects);
966
		return true;	/* LBA capacity is (now) good */
967 968
	}

969
	return false;	/* LBA capacity value may be bad */
970 971
}

972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991
static inline void ata_id_to_hd_driveid(u16 *id)
{
#ifdef __BIG_ENDIAN
	/* accessed in struct hd_driveid as 8-bit values */
	id[ATA_ID_MAX_MULTSECT]	 = __cpu_to_le16(id[ATA_ID_MAX_MULTSECT]);
	id[ATA_ID_CAPABILITY]	 = __cpu_to_le16(id[ATA_ID_CAPABILITY]);
	id[ATA_ID_OLD_PIO_MODES] = __cpu_to_le16(id[ATA_ID_OLD_PIO_MODES]);
	id[ATA_ID_OLD_DMA_MODES] = __cpu_to_le16(id[ATA_ID_OLD_DMA_MODES]);
	id[ATA_ID_MULTSECT]	 = __cpu_to_le16(id[ATA_ID_MULTSECT]);

	/* as 32-bit values */
	*(u32 *)&id[ATA_ID_LBA_CAPACITY] = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
	*(u32 *)&id[ATA_ID_SPG]		 = ata_id_u32(id, ATA_ID_SPG);

	/* as 64-bit value */
	*(u64 *)&id[ATA_ID_LBA_CAPACITY_2] =
		ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
#endif
}

992
/*
993 994 995
 * Write LBA Range Entries to the buffer that will cover the extent from
 * sector to sector + count.  This is used for TRIM and for ADD LBA(S)
 * TO NV CACHE PINNED SET.
996
 */
997 998
static inline unsigned ata_set_lba_range_entries(void *_buffer,
		unsigned buf_size, u64 sector, unsigned long count)
999 1000
{
	__le64 *buffer = _buffer;
1001
	unsigned i = 0, used_bytes;
1002

1003
	while (i < buf_size / 8 ) { /* 6-byte LBA + 2-byte range per entry */
1004 1005 1006 1007 1008 1009 1010 1011 1012
		u64 entry = sector |
			((u64)(count > 0xffff ? 0xffff : count) << 48);
		buffer[i++] = __cpu_to_le64(entry);
		if (count <= 0xffff)
			break;
		count -= 0xffff;
		sector += 0xffff;
	}

1013 1014 1015
	used_bytes = ALIGN(i * 8, 512);
	memset(buffer + i, 0, used_bytes - i * 8);
	return used_bytes;
1016 1017
}

1018
static inline bool ata_ok(u8 status)
L
Linus Torvalds 已提交
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{
	return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))
			== ATA_DRDY);
}

1024
static inline bool lba_28_ok(u64 block, u32 n_block)
1025
{
1026 1027
	/* check the ending block number: must be LESS THAN 0x0fffffff */
	return ((block + n_block) < ((1 << 28) - 1)) && (n_block <= 256);
1028 1029
}

1030
static inline bool lba_48_ok(u64 block, u32 n_block)
1031 1032 1033 1034 1035
{
	/* check the ending block number */
	return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= 65536);
}

1036 1037 1038 1039 1040
#define sata_pmp_gscr_vendor(gscr)	((gscr)[SATA_PMP_GSCR_PROD_ID] & 0xffff)
#define sata_pmp_gscr_devid(gscr)	((gscr)[SATA_PMP_GSCR_PROD_ID] >> 16)
#define sata_pmp_gscr_rev(gscr)		(((gscr)[SATA_PMP_GSCR_REV] >> 8) & 0xff)
#define sata_pmp_gscr_ports(gscr)	((gscr)[SATA_PMP_GSCR_PORT_INFO] & 0xf)

L
Linus Torvalds 已提交
1041
#endif /* __LINUX_ATA_H__ */
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