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kernel-aes67/include/linux/ata.h
Kristen Carlson Accardi ca77329fb7 [libata] Link power management infrastructure 
Device Initiated Power Management, which is defined
in SATA 2.5 can be enabled for disks which support it.
This patch enables DIPM when the user sets the link
power management policy to "min_power".

Additionally, libata drivers can define a function
(enable_pm) that will perform hardware specific actions to
enable whatever power management policy the user set up
for Host Initiated Power management (HIPM).
This power management policy will be activated after all
disks have been enumerated and intialized.  Drivers should
also define disable_pm, which will turn off link power
management, but not change link power management policy.

Documentation/scsi/link_power_management_policy.txt has additional
information.

Signed-off-by:  Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2007-10-29 11:00:35 -04:00

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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/
*
*/
#ifndef __LINUX_ATA_H__
#define __LINUX_ATA_H__
#include <linux/types.h>
/* 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,
ATA_MAX_SECTORS_128 = 128,
ATA_MAX_SECTORS = 256,
ATA_MAX_SECTORS_LBA48 = 65535,/* TODO: 65536? */
ATA_ID_WORDS = 256,
ATA_ID_SERNO = 10,
ATA_ID_FW_REV = 23,
ATA_ID_PROD = 27,
ATA_ID_OLD_PIO_MODES = 51,
ATA_ID_FIELD_VALID = 53,
ATA_ID_MWDMA_MODES = 63,
ATA_ID_PIO_MODES = 64,
ATA_ID_EIDE_DMA_MIN = 65,
ATA_ID_EIDE_PIO = 67,
ATA_ID_EIDE_PIO_IORDY = 68,
ATA_ID_UDMA_MODES = 88,
ATA_ID_MAJOR_VER = 80,
ATA_ID_PIO4 = (1 << 1),
ATA_ID_SERNO_LEN = 20,
ATA_ID_FW_REV_LEN = 8,
ATA_ID_PROD_LEN = 40,
ATA_PCI_CTL_OFS = 2,
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),
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),
ATA_MWDMA12_ONLY = (1 << 1) | (1 << 2),
ATA_MWDMA2_ONLY = (1 << 2),
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?). */
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 */
ATA_DRQ = (1 << 3), /* data request i/o */
ATA_ERR = (1 << 0), /* have an error */
ATA_SRST = (1 << 2), /* software reset */
ATA_ICRC = (1 << 7), /* interface CRC error */
ATA_UNC = (1 << 6), /* uncorrectable media error */
ATA_IDNF = (1 << 4), /* ID not found */
ATA_ABORTED = (1 << 2), /* command aborted */
/* 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 */
ATA_CMD_DEV_RESET = 0x08, /* ATAPI device reset */
ATA_CMD_CHK_POWER = 0xE5, /* check power mode */
ATA_CMD_STANDBY = 0xE2, /* place in standby power mode */
ATA_CMD_IDLE = 0xE3, /* place in idle power mode */
ATA_CMD_EDD = 0x90, /* execute device diagnostic */
ATA_CMD_FLUSH = 0xE7,
ATA_CMD_FLUSH_EXT = 0xEA,
ATA_CMD_ID_ATA = 0xEC,
ATA_CMD_ID_ATAPI = 0xA1,
ATA_CMD_READ = 0xC8,
ATA_CMD_READ_EXT = 0x25,
ATA_CMD_WRITE = 0xCA,
ATA_CMD_WRITE_EXT = 0x35,
ATA_CMD_WRITE_FUA_EXT = 0x3D,
ATA_CMD_FPDMA_READ = 0x60,
ATA_CMD_FPDMA_WRITE = 0x61,
ATA_CMD_PIO_READ = 0x20,
ATA_CMD_PIO_READ_EXT = 0x24,
ATA_CMD_PIO_WRITE = 0x30,
ATA_CMD_PIO_WRITE_EXT = 0x34,
ATA_CMD_READ_MULTI = 0xC4,
ATA_CMD_READ_MULTI_EXT = 0x29,
ATA_CMD_WRITE_MULTI = 0xC5,
ATA_CMD_WRITE_MULTI_EXT = 0x39,
ATA_CMD_WRITE_MULTI_FUA_EXT = 0xCE,
ATA_CMD_SET_FEATURES = 0xEF,
ATA_CMD_SET_MULTI = 0xC6,
ATA_CMD_PACKET = 0xA0,
ATA_CMD_VERIFY = 0x40,
ATA_CMD_VERIFY_EXT = 0x42,
ATA_CMD_STANDBYNOW1 = 0xE0,
ATA_CMD_IDLEIMMEDIATE = 0xE1,
ATA_CMD_SLEEP = 0xE6,
ATA_CMD_INIT_DEV_PARAMS = 0x91,
ATA_CMD_READ_NATIVE_MAX = 0xF8,
ATA_CMD_READ_NATIVE_MAX_EXT = 0x27,
ATA_CMD_SET_MAX = 0xF9,
ATA_CMD_SET_MAX_EXT = 0x37,
ATA_CMD_READ_LOG_EXT = 0x2f,
ATA_CMD_PMP_READ = 0xE4,
ATA_CMD_PMP_WRITE = 0xE8,
/* READ_LOG_EXT pages */
ATA_LOG_SATA_NCQ = 0x10,
/* 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,
/* 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,
XFER_MW_DMA_4 = 0x24, /* CFA only */
XFER_MW_DMA_3 = 0x23, /* CFA only */
XFER_MW_DMA_2 = 0x22,
XFER_MW_DMA_1 = 0x21,
XFER_MW_DMA_0 = 0x20,
XFER_SW_DMA_2 = 0x12,
XFER_SW_DMA_1 = 0x11,
XFER_SW_DMA_0 = 0x10,
XFER_PIO_6 = 0x0E, /* CFA only */
XFER_PIO_5 = 0x0D, /* CFA only */
XFER_PIO_4 = 0x0C,
XFER_PIO_3 = 0x0B,
XFER_PIO_2 = 0x0A,
XFER_PIO_1 = 0x09,
XFER_PIO_0 = 0x08,
XFER_PIO_SLOW = 0x00,
SETFEATURES_WC_ON = 0x02, /* Enable write cache */
SETFEATURES_WC_OFF = 0x82, /* Disable write cache */
SETFEATURES_SPINUP = 0x07, /* Spin-up drive */
SETFEATURES_SATA_ENABLE = 0x10, /* Enable use of SATA feature */
SETFEATURES_SATA_DISABLE = 0x90, /* Disable use of SATA feature */
/* SETFEATURE Sector counts for SATA features */
SATA_AN = 0x05, /* Asynchronous Notification */
SATA_DIPM = 0x03, /* Device Initiated Power Management */
/* ATAPI stuff */
ATAPI_PKT_DMA = (1 << 0),
ATAPI_DMADIR = (1 << 2), /* ATAPI data dir:
0=to device, 1=to host */
ATAPI_CDB_LEN = 16,
/* 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),
/* cable types */
ATA_CBL_NONE = 0,
ATA_CBL_PATA40 = 1,
ATA_CBL_PATA80 = 2,
ATA_CBL_PATA40_SHORT = 3, /* 40 wire cable to high UDMA spec */
ATA_CBL_PATA_UNK = 4,
ATA_CBL_SATA = 5,
/* SATA Status and Control Registers */
SCR_STATUS = 0,
SCR_ERROR = 1,
SCR_CONTROL = 2,
SCR_ACTIVE = 3,
SCR_NOTIFICATION = 4,
/* 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 */
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 */
SERR_DEV_XCHG = (1 << 26), /* device exchanged */
/* struct ata_taskfile flags */
ATA_TFLAG_LBA48 = (1 << 0), /* enable 48-bit LBA and "HOB" */
ATA_TFLAG_ISADDR = (1 << 1), /* enable r/w to nsect/lba regs */
ATA_TFLAG_DEVICE = (1 << 2), /* enable r/w to device reg */
ATA_TFLAG_WRITE = (1 << 3), /* data dir: host->dev==1 (write) */
ATA_TFLAG_LBA = (1 << 4), /* enable LBA */
ATA_TFLAG_FUA = (1 << 5), /* enable FUA */
ATA_TFLAG_POLLING = (1 << 6), /* set nIEN to 1 and use polling */
};
enum ata_tf_protocols {
/* ATA taskfile protocols */
ATA_PROT_UNKNOWN, /* unknown/invalid */
ATA_PROT_NODATA, /* no data */
ATA_PROT_PIO, /* PIO data xfer */
ATA_PROT_DMA, /* DMA */
ATA_PROT_NCQ, /* NCQ */
ATA_PROT_ATAPI, /* packet command, PIO data xfer*/
ATA_PROT_ATAPI_NODATA, /* packet command, no data */
ATA_PROT_ATAPI_DMA, /* packet command with special DMA sauce */
};
enum ata_ioctls {
ATA_IOC_GET_IO32 = 0x309,
ATA_IOC_SET_IO32 = 0x324,
};
/* core structures */
struct ata_prd {
u32 addr;
u32 flags_len;
};
struct ata_taskfile {
unsigned long flags; /* ATA_TFLAG_xxx */
u8 protocol; /* ATA_PROT_xxx */
u8 ctl; /* control reg */
u8 hob_feature; /* additional data */
u8 hob_nsect; /* to support LBA48 */
u8 hob_lbal;
u8 hob_lbam;
u8 hob_lbah;
u8 feature;
u8 nsect;
u8 lbal;
u8 lbam;
u8 lbah;
u8 device;
u8 command; /* IO operation */
};
#define ata_id_is_ata(id) (((id)[0] & (1 << 15)) == 0)
#define ata_id_has_lba(id) ((id)[49] & (1 << 9))
#define ata_id_has_dma(id) ((id)[49] & (1 << 8))
#define ata_id_has_ncq(id) ((id)[76] & (1 << 8))
#define ata_id_queue_depth(id) (((id)[75] & 0x1f) + 1)
#define ata_id_removeable(id) ((id)[0] & (1 << 7))
#define ata_id_has_dword_io(id) ((id)[48] & (1 << 0))
#define ata_id_has_atapi_AN(id) \
( (((id)[76] != 0x0000) && ((id)[76] != 0xffff)) && \
((id)[78] & (1 << 5)) )
#define ata_id_iordy_disable(id) ((id)[49] & (1 << 10))
#define ata_id_has_iordy(id) ((id)[49] & (1 << 11))
#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]) )
#define ata_id_cdb_intr(id) (((id)[0] & 0x60) == 0x20)
static inline bool ata_id_has_hipm(const u16 *id)
{
u16 val = id[76];
if (val == 0 || val == 0xffff)
return false;
return val & (1 << 9);
}
static inline bool ata_id_has_dipm(const u16 *id)
{
u16 val = id[78];
if (val == 0 || val == 0xffff)
return false;
return val & (1 << 3);
}
static inline int ata_id_has_fua(const u16 *id)
{
if ((id[84] & 0xC000) != 0x4000)
return 0;
return id[84] & (1 << 6);
}
static inline int ata_id_has_flush(const u16 *id)
{
if ((id[83] & 0xC000) != 0x4000)
return 0;
return id[83] & (1 << 12);
}
static inline int ata_id_has_flush_ext(const u16 *id)
{
if ((id[83] & 0xC000) != 0x4000)
return 0;
return id[83] & (1 << 13);
}
static inline int ata_id_has_lba48(const u16 *id)
{
if ((id[83] & 0xC000) != 0x4000)
return 0;
return id[83] & (1 << 10);
}
static inline int ata_id_hpa_enabled(const u16 *id)
{
/* Yes children, word 83 valid bits cover word 82 data */
if ((id[83] & 0xC000) != 0x4000)
return 0;
/* And 87 covers 85-87 */
if ((id[87] & 0xC000) != 0x4000)
return 0;
/* Check command sets enabled as well as supported */
if ((id[85] & ( 1 << 10)) == 0)
return 0;
return id[82] & (1 << 10);
}
static inline int ata_id_has_wcache(const u16 *id)
{
/* Yes children, word 83 valid bits cover word 82 data */
if ((id[83] & 0xC000) != 0x4000)
return 0;
return id[82] & (1 << 5);
}
static inline int ata_id_has_pm(const u16 *id)
{
if ((id[83] & 0xC000) != 0x4000)
return 0;
return id[82] & (1 << 3);
}
static inline int ata_id_rahead_enabled(const u16 *id)
{
if ((id[87] & 0xC000) != 0x4000)
return 0;
return id[85] & (1 << 6);
}
static inline int ata_id_wcache_enabled(const u16 *id)
{
if ((id[87] & 0xC000) != 0x4000)
return 0;
return id[85] & (1 << 5);
}
/**
* 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
* reliably report on drives below ATA3.
*/
static inline unsigned int ata_id_major_version(const u16 *id)
{
unsigned int mver;
if (id[ATA_ID_MAJOR_VER] == 0xFFFF)
return 0;
for (mver = 14; mver >= 1; mver--)
if (id[ATA_ID_MAJOR_VER] & (1 << mver))
break;
return mver;
}
static inline int ata_id_is_sata(const u16 *id)
{
return ata_id_major_version(id) >= 5 && id[93] == 0;
}
static inline int ata_id_current_chs_valid(const u16 *id)
{
/* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command
has not been issued to the device then the values of
id[54] to id[56] are vendor specific. */
return (id[53] & 0x01) && /* Current translation valid */
id[54] && /* cylinders in current translation */
id[55] && /* heads in current translation */
id[55] <= 16 &&
id[56]; /* sectors in current translation */
}
static inline int ata_id_is_cfa(const u16 *id)
{
u16 v = id[0];
if (v == 0x848A) /* Standard CF */
return 1;
/* Could be CF hiding as standard ATA */
if (ata_id_major_version(id) >= 3 && id[82] != 0xFFFF &&
(id[82] & ( 1 << 2)))
return 1;
return 0;
}
static inline int ata_drive_40wire(const u16 *dev_id)
{
if (ata_id_is_sata(dev_id))
return 0; /* SATA */
if ((dev_id[93] & 0xE000) == 0x6000)
return 0; /* 80 wire */
return 1;
}
static inline int atapi_cdb_len(const u16 *dev_id)
{
u16 tmp = dev_id[0] & 0x3;
switch (tmp) {
case 0: return 12;
case 1: return 16;
default: return -1;
}
}
static inline int is_atapi_taskfile(const struct ata_taskfile *tf)
{
return (tf->protocol == ATA_PROT_ATAPI) ||
(tf->protocol == ATA_PROT_ATAPI_NODATA) ||
(tf->protocol == ATA_PROT_ATAPI_DMA);
}
static inline int is_multi_taskfile(struct ata_taskfile *tf)
{
return (tf->command == ATA_CMD_READ_MULTI) ||
(tf->command == ATA_CMD_WRITE_MULTI) ||
(tf->command == ATA_CMD_READ_MULTI_EXT) ||
(tf->command == ATA_CMD_WRITE_MULTI_EXT) ||
(tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
}
static inline int ata_ok(u8 status)
{
return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))
== ATA_DRDY);
}
static inline int lba_28_ok(u64 block, u32 n_block)
{
/* check the ending block number */
return ((block + n_block - 1) < ((u64)1 << 28)) && (n_block <= 256);
}
static inline int lba_48_ok(u64 block, u32 n_block)
{
/* check the ending block number */
return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= 65536);
}
#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)
#endif /* __LINUX_ATA_H__ */
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