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TOMOYO Linux Cross Reference
Linux/include/linux/ata.h

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  1 
  2 /*
  3  *  Copyright 2003-2004 Red Hat, Inc.  All rights reserved.
  4  *  Copyright 2003-2004 Jeff Garzik
  5  *
  6  *
  7  *  This program is free software; you can redistribute it and/or modify
  8  *  it under the terms of the GNU General Public License as published by
  9  *  the Free Software Foundation; either version 2, or (at your option)
 10  *  any later version.
 11  *
 12  *  This program is distributed in the hope that it will be useful,
 13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 15  *  GNU General Public License for more details.
 16  *
 17  *  You should have received a copy of the GNU General Public License
 18  *  along with this program; see the file COPYING.  If not, write to
 19  *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 20  *
 21  *
 22  *  libata documentation is available via 'make {ps|pdf}docs',
 23  *  as Documentation/DocBook/libata.*
 24  *
 25  *  Hardware documentation available from http://www.t13.org/
 26  *
 27  */
 28 
 29 #ifndef __LINUX_ATA_H__
 30 #define __LINUX_ATA_H__
 31 
 32 #include <linux/kernel.h>
 33 #include <linux/string.h>
 34 #include <linux/types.h>
 35 #include <asm/byteorder.h>
 36 
 37 /* defines only for the constants which don't work well as enums */
 38 #define ATA_DMA_BOUNDARY        0xffffUL
 39 #define ATA_DMA_MASK            0xffffffffULL
 40 
 41 enum {
 42         /* various global constants */
 43         ATA_MAX_DEVICES         = 2,    /* per bus/port */
 44         ATA_MAX_PRD             = 256,  /* we could make these 256/256 */
 45         ATA_SECT_SIZE           = 512,
 46         ATA_MAX_SECTORS_128     = 128,
 47         ATA_MAX_SECTORS         = 256,
 48         ATA_MAX_SECTORS_LBA48   = 65535,/* TODO: 65536? */
 49         ATA_MAX_SECTORS_TAPE    = 65535,
 50 
 51         ATA_ID_WORDS            = 256,
 52         ATA_ID_CONFIG           = 0,
 53         ATA_ID_CYLS             = 1,
 54         ATA_ID_HEADS            = 3,
 55         ATA_ID_SECTORS          = 6,
 56         ATA_ID_SERNO            = 10,
 57         ATA_ID_BUF_SIZE         = 21,
 58         ATA_ID_FW_REV           = 23,
 59         ATA_ID_PROD             = 27,
 60         ATA_ID_MAX_MULTSECT     = 47,
 61         ATA_ID_DWORD_IO         = 48,
 62         ATA_ID_CAPABILITY       = 49,
 63         ATA_ID_OLD_PIO_MODES    = 51,
 64         ATA_ID_OLD_DMA_MODES    = 52,
 65         ATA_ID_FIELD_VALID      = 53,
 66         ATA_ID_CUR_CYLS         = 54,
 67         ATA_ID_CUR_HEADS        = 55,
 68         ATA_ID_CUR_SECTORS      = 56,
 69         ATA_ID_MULTSECT         = 59,
 70         ATA_ID_LBA_CAPACITY     = 60,
 71         ATA_ID_SWDMA_MODES      = 62,
 72         ATA_ID_MWDMA_MODES      = 63,
 73         ATA_ID_PIO_MODES        = 64,
 74         ATA_ID_EIDE_DMA_MIN     = 65,
 75         ATA_ID_EIDE_DMA_TIME    = 66,
 76         ATA_ID_EIDE_PIO         = 67,
 77         ATA_ID_EIDE_PIO_IORDY   = 68,
 78         ATA_ID_ADDITIONAL_SUPP  = 69,
 79         ATA_ID_QUEUE_DEPTH      = 75,
 80         ATA_ID_MAJOR_VER        = 80,
 81         ATA_ID_COMMAND_SET_1    = 82,
 82         ATA_ID_COMMAND_SET_2    = 83,
 83         ATA_ID_CFSSE            = 84,
 84         ATA_ID_CFS_ENABLE_1     = 85,
 85         ATA_ID_CFS_ENABLE_2     = 86,
 86         ATA_ID_CSF_DEFAULT      = 87,
 87         ATA_ID_UDMA_MODES       = 88,
 88         ATA_ID_HW_CONFIG        = 93,
 89         ATA_ID_SPG              = 98,
 90         ATA_ID_LBA_CAPACITY_2   = 100,
 91         ATA_ID_SECTOR_SIZE      = 106,
 92         ATA_ID_WWN              = 108,
 93         ATA_ID_LOGICAL_SECTOR_SIZE      = 117,  /* and 118 */
 94         ATA_ID_LAST_LUN         = 126,
 95         ATA_ID_DLF              = 128,
 96         ATA_ID_CSFO             = 129,
 97         ATA_ID_CFA_POWER        = 160,
 98         ATA_ID_CFA_KEY_MGMT     = 162,
 99         ATA_ID_CFA_MODES        = 163,
100         ATA_ID_DATA_SET_MGMT    = 169,
101         ATA_ID_ROT_SPEED        = 217,
102         ATA_ID_PIO4             = (1 << 1),
103 
104         ATA_ID_SERNO_LEN        = 20,
105         ATA_ID_FW_REV_LEN       = 8,
106         ATA_ID_PROD_LEN         = 40,
107         ATA_ID_WWN_LEN          = 8,
108 
109         ATA_PCI_CTL_OFS         = 2,
110 
111         ATA_PIO0                = (1 << 0),
112         ATA_PIO1                = ATA_PIO0 | (1 << 1),
113         ATA_PIO2                = ATA_PIO1 | (1 << 2),
114         ATA_PIO3                = ATA_PIO2 | (1 << 3),
115         ATA_PIO4                = ATA_PIO3 | (1 << 4),
116         ATA_PIO5                = ATA_PIO4 | (1 << 5),
117         ATA_PIO6                = ATA_PIO5 | (1 << 6),
118 
119         ATA_PIO4_ONLY           = (1 << 4),
120 
121         ATA_SWDMA0              = (1 << 0),
122         ATA_SWDMA1              = ATA_SWDMA0 | (1 << 1),
123         ATA_SWDMA2              = ATA_SWDMA1 | (1 << 2),
124 
125         ATA_SWDMA2_ONLY         = (1 << 2),
126 
127         ATA_MWDMA0              = (1 << 0),
128         ATA_MWDMA1              = ATA_MWDMA0 | (1 << 1),
129         ATA_MWDMA2              = ATA_MWDMA1 | (1 << 2),
130         ATA_MWDMA3              = ATA_MWDMA2 | (1 << 3),
131         ATA_MWDMA4              = ATA_MWDMA3 | (1 << 4),
132 
133         ATA_MWDMA12_ONLY        = (1 << 1) | (1 << 2),
134         ATA_MWDMA2_ONLY         = (1 << 2),
135 
136         ATA_UDMA0               = (1 << 0),
137         ATA_UDMA1               = ATA_UDMA0 | (1 << 1),
138         ATA_UDMA2               = ATA_UDMA1 | (1 << 2),
139         ATA_UDMA3               = ATA_UDMA2 | (1 << 3),
140         ATA_UDMA4               = ATA_UDMA3 | (1 << 4),
141         ATA_UDMA5               = ATA_UDMA4 | (1 << 5),
142         ATA_UDMA6               = ATA_UDMA5 | (1 << 6),
143         ATA_UDMA7               = ATA_UDMA6 | (1 << 7),
144         /* ATA_UDMA7 is just for completeness... doesn't exist (yet?).  */
145 
146         ATA_UDMA24_ONLY         = (1 << 2) | (1 << 4),
147 
148         ATA_UDMA_MASK_40C       = ATA_UDMA2,    /* udma0-2 */
149 
150         /* DMA-related */
151         ATA_PRD_SZ              = 8,
152         ATA_PRD_TBL_SZ          = (ATA_MAX_PRD * ATA_PRD_SZ),
153         ATA_PRD_EOT             = (1 << 31),    /* end-of-table flag */
154 
155         ATA_DMA_TABLE_OFS       = 4,
156         ATA_DMA_STATUS          = 2,
157         ATA_DMA_CMD             = 0,
158         ATA_DMA_WR              = (1 << 3),
159         ATA_DMA_START           = (1 << 0),
160         ATA_DMA_INTR            = (1 << 2),
161         ATA_DMA_ERR             = (1 << 1),
162         ATA_DMA_ACTIVE          = (1 << 0),
163 
164         /* bits in ATA command block registers */
165         ATA_HOB                 = (1 << 7),     /* LBA48 selector */
166         ATA_NIEN                = (1 << 1),     /* disable-irq flag */
167         ATA_LBA                 = (1 << 6),     /* LBA28 selector */
168         ATA_DEV1                = (1 << 4),     /* Select Device 1 (slave) */
169         ATA_DEVICE_OBS          = (1 << 7) | (1 << 5), /* obs bits in dev reg */
170         ATA_DEVCTL_OBS          = (1 << 3),     /* obsolete bit in devctl reg */
171         ATA_BUSY                = (1 << 7),     /* BSY status bit */
172         ATA_DRDY                = (1 << 6),     /* device ready */
173         ATA_DF                  = (1 << 5),     /* device fault */
174         ATA_DSC                 = (1 << 4),     /* drive seek complete */
175         ATA_DRQ                 = (1 << 3),     /* data request i/o */
176         ATA_CORR                = (1 << 2),     /* corrected data error */
177         ATA_IDX                 = (1 << 1),     /* index */
178         ATA_ERR                 = (1 << 0),     /* have an error */
179         ATA_SRST                = (1 << 2),     /* software reset */
180         ATA_ICRC                = (1 << 7),     /* interface CRC error */
181         ATA_BBK                 = ATA_ICRC,     /* pre-EIDE: block marked bad */
182         ATA_UNC                 = (1 << 6),     /* uncorrectable media error */
183         ATA_MC                  = (1 << 5),     /* media changed */
184         ATA_IDNF                = (1 << 4),     /* ID not found */
185         ATA_MCR                 = (1 << 3),     /* media change requested */
186         ATA_ABORTED             = (1 << 2),     /* command aborted */
187         ATA_TRK0NF              = (1 << 1),     /* track 0 not found */
188         ATA_AMNF                = (1 << 0),     /* address mark not found */
189         ATAPI_LFS               = 0xF0,         /* last failed sense */
190         ATAPI_EOM               = ATA_TRK0NF,   /* end of media */
191         ATAPI_ILI               = ATA_AMNF,     /* illegal length indication */
192         ATAPI_IO                = (1 << 1),
193         ATAPI_COD               = (1 << 0),
194 
195         /* ATA command block registers */
196         ATA_REG_DATA            = 0x00,
197         ATA_REG_ERR             = 0x01,
198         ATA_REG_NSECT           = 0x02,
199         ATA_REG_LBAL            = 0x03,
200         ATA_REG_LBAM            = 0x04,
201         ATA_REG_LBAH            = 0x05,
202         ATA_REG_DEVICE          = 0x06,
203         ATA_REG_STATUS          = 0x07,
204 
205         ATA_REG_FEATURE         = ATA_REG_ERR, /* and their aliases */
206         ATA_REG_CMD             = ATA_REG_STATUS,
207         ATA_REG_BYTEL           = ATA_REG_LBAM,
208         ATA_REG_BYTEH           = ATA_REG_LBAH,
209         ATA_REG_DEVSEL          = ATA_REG_DEVICE,
210         ATA_REG_IRQ             = ATA_REG_NSECT,
211 
212         /* ATA device commands */
213         ATA_CMD_DEV_RESET       = 0x08, /* ATAPI device reset */
214         ATA_CMD_CHK_POWER       = 0xE5, /* check power mode */
215         ATA_CMD_STANDBY         = 0xE2, /* place in standby power mode */
216         ATA_CMD_IDLE            = 0xE3, /* place in idle power mode */
217         ATA_CMD_EDD             = 0x90, /* execute device diagnostic */
218         ATA_CMD_DOWNLOAD_MICRO  = 0x92,
219         ATA_CMD_NOP             = 0x00,
220         ATA_CMD_FLUSH           = 0xE7,
221         ATA_CMD_FLUSH_EXT       = 0xEA,
222         ATA_CMD_ID_ATA          = 0xEC,
223         ATA_CMD_ID_ATAPI        = 0xA1,
224         ATA_CMD_SERVICE         = 0xA2,
225         ATA_CMD_READ            = 0xC8,
226         ATA_CMD_READ_EXT        = 0x25,
227         ATA_CMD_READ_QUEUED     = 0x26,
228         ATA_CMD_READ_STREAM_EXT = 0x2B,
229         ATA_CMD_READ_STREAM_DMA_EXT = 0x2A,
230         ATA_CMD_WRITE           = 0xCA,
231         ATA_CMD_WRITE_EXT       = 0x35,
232         ATA_CMD_WRITE_QUEUED    = 0x36,
233         ATA_CMD_WRITE_STREAM_EXT = 0x3B,
234         ATA_CMD_WRITE_STREAM_DMA_EXT = 0x3A,
235         ATA_CMD_WRITE_FUA_EXT   = 0x3D,
236         ATA_CMD_WRITE_QUEUED_FUA_EXT = 0x3E,
237         ATA_CMD_FPDMA_READ      = 0x60,
238         ATA_CMD_FPDMA_WRITE     = 0x61,
239         ATA_CMD_PIO_READ        = 0x20,
240         ATA_CMD_PIO_READ_EXT    = 0x24,
241         ATA_CMD_PIO_WRITE       = 0x30,
242         ATA_CMD_PIO_WRITE_EXT   = 0x34,
243         ATA_CMD_READ_MULTI      = 0xC4,
244         ATA_CMD_READ_MULTI_EXT  = 0x29,
245         ATA_CMD_WRITE_MULTI     = 0xC5,
246         ATA_CMD_WRITE_MULTI_EXT = 0x39,
247         ATA_CMD_WRITE_MULTI_FUA_EXT = 0xCE,
248         ATA_CMD_SET_FEATURES    = 0xEF,
249         ATA_CMD_SET_MULTI       = 0xC6,
250         ATA_CMD_PACKET          = 0xA0,
251         ATA_CMD_VERIFY          = 0x40,
252         ATA_CMD_VERIFY_EXT      = 0x42,
253         ATA_CMD_WRITE_UNCORR_EXT = 0x45,
254         ATA_CMD_STANDBYNOW1     = 0xE0,
255         ATA_CMD_IDLEIMMEDIATE   = 0xE1,
256         ATA_CMD_SLEEP           = 0xE6,
257         ATA_CMD_INIT_DEV_PARAMS = 0x91,
258         ATA_CMD_READ_NATIVE_MAX = 0xF8,
259         ATA_CMD_READ_NATIVE_MAX_EXT = 0x27,
260         ATA_CMD_SET_MAX         = 0xF9,
261         ATA_CMD_SET_MAX_EXT     = 0x37,
262         ATA_CMD_READ_LOG_EXT    = 0x2F,
263         ATA_CMD_WRITE_LOG_EXT   = 0x3F,
264         ATA_CMD_READ_LOG_DMA_EXT = 0x47,
265         ATA_CMD_WRITE_LOG_DMA_EXT = 0x57,
266         ATA_CMD_TRUSTED_RCV     = 0x5C,
267         ATA_CMD_TRUSTED_RCV_DMA = 0x5D,
268         ATA_CMD_TRUSTED_SND     = 0x5E,
269         ATA_CMD_TRUSTED_SND_DMA = 0x5F,
270         ATA_CMD_PMP_READ        = 0xE4,
271         ATA_CMD_PMP_WRITE       = 0xE8,
272         ATA_CMD_CONF_OVERLAY    = 0xB1,
273         ATA_CMD_SEC_SET_PASS    = 0xF1,
274         ATA_CMD_SEC_UNLOCK      = 0xF2,
275         ATA_CMD_SEC_ERASE_PREP  = 0xF3,
276         ATA_CMD_SEC_ERASE_UNIT  = 0xF4,
277         ATA_CMD_SEC_FREEZE_LOCK = 0xF5,
278         ATA_CMD_SEC_DISABLE_PASS = 0xF6,
279         ATA_CMD_CONFIG_STREAM   = 0x51,
280         ATA_CMD_SMART           = 0xB0,
281         ATA_CMD_MEDIA_LOCK      = 0xDE,
282         ATA_CMD_MEDIA_UNLOCK    = 0xDF,
283         ATA_CMD_DSM             = 0x06,
284         ATA_CMD_CHK_MED_CRD_TYP = 0xD1,
285         ATA_CMD_CFA_REQ_EXT_ERR = 0x03,
286         ATA_CMD_CFA_WRITE_NE    = 0x38,
287         ATA_CMD_CFA_TRANS_SECT  = 0x87,
288         ATA_CMD_CFA_ERASE       = 0xC0,
289         ATA_CMD_CFA_WRITE_MULT_NE = 0xCD,
290         /* marked obsolete in the ATA/ATAPI-7 spec */
291         ATA_CMD_RESTORE         = 0x10,
292 
293         /* READ_LOG_EXT pages */
294         ATA_LOG_SATA_NCQ        = 0x10,
295 
296         /* READ/WRITE LONG (obsolete) */
297         ATA_CMD_READ_LONG       = 0x22,
298         ATA_CMD_READ_LONG_ONCE  = 0x23,
299         ATA_CMD_WRITE_LONG      = 0x32,
300         ATA_CMD_WRITE_LONG_ONCE = 0x33,
301 
302         /* SETFEATURES stuff */
303         SETFEATURES_XFER        = 0x03,
304         XFER_UDMA_7             = 0x47,
305         XFER_UDMA_6             = 0x46,
306         XFER_UDMA_5             = 0x45,
307         XFER_UDMA_4             = 0x44,
308         XFER_UDMA_3             = 0x43,
309         XFER_UDMA_2             = 0x42,
310         XFER_UDMA_1             = 0x41,
311         XFER_UDMA_0             = 0x40,
312         XFER_MW_DMA_4           = 0x24, /* CFA only */
313         XFER_MW_DMA_3           = 0x23, /* CFA only */
314         XFER_MW_DMA_2           = 0x22,
315         XFER_MW_DMA_1           = 0x21,
316         XFER_MW_DMA_0           = 0x20,
317         XFER_SW_DMA_2           = 0x12,
318         XFER_SW_DMA_1           = 0x11,
319         XFER_SW_DMA_0           = 0x10,
320         XFER_PIO_6              = 0x0E, /* CFA only */
321         XFER_PIO_5              = 0x0D, /* CFA only */
322         XFER_PIO_4              = 0x0C,
323         XFER_PIO_3              = 0x0B,
324         XFER_PIO_2              = 0x0A,
325         XFER_PIO_1              = 0x09,
326         XFER_PIO_0              = 0x08,
327         XFER_PIO_SLOW           = 0x00,
328 
329         SETFEATURES_WC_ON       = 0x02, /* Enable write cache */
330         SETFEATURES_WC_OFF      = 0x82, /* Disable write cache */
331 
332         /* Enable/Disable Automatic Acoustic Management */
333         SETFEATURES_AAM_ON      = 0x42,
334         SETFEATURES_AAM_OFF     = 0xC2,
335 
336         SETFEATURES_SPINUP      = 0x07, /* Spin-up drive */
337 
338         SETFEATURES_SATA_ENABLE = 0x10, /* Enable use of SATA feature */
339         SETFEATURES_SATA_DISABLE = 0x90, /* Disable use of SATA feature */
340 
341         /* SETFEATURE Sector counts for SATA features */
342         SATA_FPDMA_OFFSET       = 0x01, /* FPDMA non-zero buffer offsets */
343         SATA_FPDMA_AA           = 0x02, /* FPDMA Setup FIS Auto-Activate */
344         SATA_DIPM               = 0x03, /* Device Initiated Power Management */
345         SATA_FPDMA_IN_ORDER     = 0x04, /* FPDMA in-order data delivery */
346         SATA_AN                 = 0x05, /* Asynchronous Notification */
347         SATA_SSP                = 0x06, /* Software Settings Preservation */
348 
349         /* feature values for SET_MAX */
350         ATA_SET_MAX_ADDR        = 0x00,
351         ATA_SET_MAX_PASSWD      = 0x01,
352         ATA_SET_MAX_LOCK        = 0x02,
353         ATA_SET_MAX_UNLOCK      = 0x03,
354         ATA_SET_MAX_FREEZE_LOCK = 0x04,
355 
356         /* feature values for DEVICE CONFIGURATION OVERLAY */
357         ATA_DCO_RESTORE         = 0xC0,
358         ATA_DCO_FREEZE_LOCK     = 0xC1,
359         ATA_DCO_IDENTIFY        = 0xC2,
360         ATA_DCO_SET             = 0xC3,
361 
362         /* feature values for SMART */
363         ATA_SMART_ENABLE        = 0xD8,
364         ATA_SMART_READ_VALUES   = 0xD0,
365         ATA_SMART_READ_THRESHOLDS = 0xD1,
366 
367         /* feature values for Data Set Management */
368         ATA_DSM_TRIM            = 0x01,
369 
370         /* password used in LBA Mid / LBA High for executing SMART commands */
371         ATA_SMART_LBAM_PASS     = 0x4F,
372         ATA_SMART_LBAH_PASS     = 0xC2,
373 
374         /* ATAPI stuff */
375         ATAPI_PKT_DMA           = (1 << 0),
376         ATAPI_DMADIR            = (1 << 2),     /* ATAPI data dir:
377                                                    0=to device, 1=to host */
378         ATAPI_CDB_LEN           = 16,
379 
380         /* PMP stuff */
381         SATA_PMP_MAX_PORTS      = 15,
382         SATA_PMP_CTRL_PORT      = 15,
383 
384         SATA_PMP_GSCR_DWORDS    = 128,
385         SATA_PMP_GSCR_PROD_ID   = 0,
386         SATA_PMP_GSCR_REV       = 1,
387         SATA_PMP_GSCR_PORT_INFO = 2,
388         SATA_PMP_GSCR_ERROR     = 32,
389         SATA_PMP_GSCR_ERROR_EN  = 33,
390         SATA_PMP_GSCR_FEAT      = 64,
391         SATA_PMP_GSCR_FEAT_EN   = 96,
392 
393         SATA_PMP_PSCR_STATUS    = 0,
394         SATA_PMP_PSCR_ERROR     = 1,
395         SATA_PMP_PSCR_CONTROL   = 2,
396 
397         SATA_PMP_FEAT_BIST      = (1 << 0),
398         SATA_PMP_FEAT_PMREQ     = (1 << 1),
399         SATA_PMP_FEAT_DYNSSC    = (1 << 2),
400         SATA_PMP_FEAT_NOTIFY    = (1 << 3),
401 
402         /* cable types */
403         ATA_CBL_NONE            = 0,
404         ATA_CBL_PATA40          = 1,
405         ATA_CBL_PATA80          = 2,
406         ATA_CBL_PATA40_SHORT    = 3,    /* 40 wire cable to high UDMA spec */
407         ATA_CBL_PATA_UNK        = 4,    /* don't know, maybe 80c? */
408         ATA_CBL_PATA_IGN        = 5,    /* don't know, ignore cable handling */
409         ATA_CBL_SATA            = 6,
410 
411         /* SATA Status and Control Registers */
412         SCR_STATUS              = 0,
413         SCR_ERROR               = 1,
414         SCR_CONTROL             = 2,
415         SCR_ACTIVE              = 3,
416         SCR_NOTIFICATION        = 4,
417 
418         /* SError bits */
419         SERR_DATA_RECOVERED     = (1 << 0), /* recovered data error */
420         SERR_COMM_RECOVERED     = (1 << 1), /* recovered comm failure */
421         SERR_DATA               = (1 << 8), /* unrecovered data error */
422         SERR_PERSISTENT         = (1 << 9), /* persistent data/comm error */
423         SERR_PROTOCOL           = (1 << 10), /* protocol violation */
424         SERR_INTERNAL           = (1 << 11), /* host internal error */
425         SERR_PHYRDY_CHG         = (1 << 16), /* PHY RDY changed */
426         SERR_PHY_INT_ERR        = (1 << 17), /* PHY internal error */
427         SERR_COMM_WAKE          = (1 << 18), /* Comm wake */
428         SERR_10B_8B_ERR         = (1 << 19), /* 10b to 8b decode error */
429         SERR_DISPARITY          = (1 << 20), /* Disparity */
430         SERR_CRC                = (1 << 21), /* CRC error */
431         SERR_HANDSHAKE          = (1 << 22), /* Handshake error */
432         SERR_LINK_SEQ_ERR       = (1 << 23), /* Link sequence error */
433         SERR_TRANS_ST_ERROR     = (1 << 24), /* Transport state trans. error */
434         SERR_UNRECOG_FIS        = (1 << 25), /* Unrecognized FIS */
435         SERR_DEV_XCHG           = (1 << 26), /* device exchanged */
436 
437         /* struct ata_taskfile flags */
438         ATA_TFLAG_LBA48         = (1 << 0), /* enable 48-bit LBA and "HOB" */
439         ATA_TFLAG_ISADDR        = (1 << 1), /* enable r/w to nsect/lba regs */
440         ATA_TFLAG_DEVICE        = (1 << 2), /* enable r/w to device reg */
441         ATA_TFLAG_WRITE         = (1 << 3), /* data dir: host->dev==1 (write) */
442         ATA_TFLAG_LBA           = (1 << 4), /* enable LBA */
443         ATA_TFLAG_FUA           = (1 << 5), /* enable FUA */
444         ATA_TFLAG_POLLING       = (1 << 6), /* set nIEN to 1 and use polling */
445 
446         /* protocol flags */
447         ATA_PROT_FLAG_PIO       = (1 << 0), /* is PIO */
448         ATA_PROT_FLAG_DMA       = (1 << 1), /* is DMA */
449         ATA_PROT_FLAG_DATA      = ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA,
450         ATA_PROT_FLAG_NCQ       = (1 << 2), /* is NCQ */
451         ATA_PROT_FLAG_ATAPI     = (1 << 3), /* is ATAPI */
452 };
453 
454 enum ata_tf_protocols {
455         /* ATA taskfile protocols */
456         ATA_PROT_UNKNOWN,       /* unknown/invalid */
457         ATA_PROT_NODATA,        /* no data */
458         ATA_PROT_PIO,           /* PIO data xfer */
459         ATA_PROT_DMA,           /* DMA */
460         ATA_PROT_NCQ,           /* NCQ */
461         ATAPI_PROT_NODATA,      /* packet command, no data */
462         ATAPI_PROT_PIO,         /* packet command, PIO data xfer*/
463         ATAPI_PROT_DMA,         /* packet command with special DMA sauce */
464 };
465 
466 enum ata_ioctls {
467         ATA_IOC_GET_IO32        = 0x309,
468         ATA_IOC_SET_IO32        = 0x324,
469 };
470 
471 /* core structures */
472 
473 struct ata_bmdma_prd {
474         __le32                  addr;
475         __le32                  flags_len;
476 };
477 
478 struct ata_taskfile {
479         unsigned long           flags;          /* ATA_TFLAG_xxx */
480         u8                      protocol;       /* ATA_PROT_xxx */
481 
482         u8                      ctl;            /* control reg */
483 
484         u8                      hob_feature;    /* additional data */
485         u8                      hob_nsect;      /* to support LBA48 */
486         u8                      hob_lbal;
487         u8                      hob_lbam;
488         u8                      hob_lbah;
489 
490         u8                      feature;
491         u8                      nsect;
492         u8                      lbal;
493         u8                      lbam;
494         u8                      lbah;
495 
496         u8                      device;
497 
498         u8                      command;        /* IO operation */
499 };
500 
501 /*
502  * protocol tests
503  */
504 static inline unsigned int ata_prot_flags(u8 prot)
505 {
506         switch (prot) {
507         case ATA_PROT_NODATA:
508                 return 0;
509         case ATA_PROT_PIO:
510                 return ATA_PROT_FLAG_PIO;
511         case ATA_PROT_DMA:
512                 return ATA_PROT_FLAG_DMA;
513         case ATA_PROT_NCQ:
514                 return ATA_PROT_FLAG_DMA | ATA_PROT_FLAG_NCQ;
515         case ATAPI_PROT_NODATA:
516                 return ATA_PROT_FLAG_ATAPI;
517         case ATAPI_PROT_PIO:
518                 return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_PIO;
519         case ATAPI_PROT_DMA:
520                 return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_DMA;
521         }
522         return 0;
523 }
524 
525 static inline int ata_is_atapi(u8 prot)
526 {
527         return ata_prot_flags(prot) & ATA_PROT_FLAG_ATAPI;
528 }
529 
530 static inline int ata_is_nodata(u8 prot)
531 {
532         return !(ata_prot_flags(prot) & ATA_PROT_FLAG_DATA);
533 }
534 
535 static inline int ata_is_pio(u8 prot)
536 {
537         return ata_prot_flags(prot) & ATA_PROT_FLAG_PIO;
538 }
539 
540 static inline int ata_is_dma(u8 prot)
541 {
542         return ata_prot_flags(prot) & ATA_PROT_FLAG_DMA;
543 }
544 
545 static inline int ata_is_ncq(u8 prot)
546 {
547         return ata_prot_flags(prot) & ATA_PROT_FLAG_NCQ;
548 }
549 
550 static inline int ata_is_data(u8 prot)
551 {
552         return ata_prot_flags(prot) & ATA_PROT_FLAG_DATA;
553 }
554 
555 /*
556  * id tests
557  */
558 #define ata_id_is_ata(id)       (((id)[ATA_ID_CONFIG] & (1 << 15)) == 0)
559 #define ata_id_has_lba(id)      ((id)[ATA_ID_CAPABILITY] & (1 << 9))
560 #define ata_id_has_dma(id)      ((id)[ATA_ID_CAPABILITY] & (1 << 8))
561 #define ata_id_has_ncq(id)      ((id)[76] & (1 << 8))
562 #define ata_id_queue_depth(id)  (((id)[ATA_ID_QUEUE_DEPTH] & 0x1f) + 1)
563 #define ata_id_removeable(id)   ((id)[ATA_ID_CONFIG] & (1 << 7))
564 #define ata_id_has_atapi_AN(id) \
565         ( (((id)[76] != 0x0000) && ((id)[76] != 0xffff)) && \
566           ((id)[78] & (1 << 5)) )
567 #define ata_id_has_fpdma_aa(id) \
568         ( (((id)[76] != 0x0000) && ((id)[76] != 0xffff)) && \
569           ((id)[78] & (1 << 2)) )
570 #define ata_id_iordy_disable(id) ((id)[ATA_ID_CAPABILITY] & (1 << 10))
571 #define ata_id_has_iordy(id) ((id)[ATA_ID_CAPABILITY] & (1 << 11))
572 #define ata_id_u32(id,n)        \
573         (((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
574 #define ata_id_u64(id,n)        \
575         ( ((u64) (id)[(n) + 3] << 48) | \
576           ((u64) (id)[(n) + 2] << 32) | \
577           ((u64) (id)[(n) + 1] << 16) | \
578           ((u64) (id)[(n) + 0]) )
579 
580 #define ata_id_cdb_intr(id)     (((id)[ATA_ID_CONFIG] & 0x60) == 0x20)
581 
582 static inline bool ata_id_has_hipm(const u16 *id)
583 {
584         u16 val = id[76];
585 
586         if (val == 0 || val == 0xffff)
587                 return false;
588 
589         return val & (1 << 9);
590 }
591 
592 static inline bool ata_id_has_dipm(const u16 *id)
593 {
594         u16 val = id[78];
595 
596         if (val == 0 || val == 0xffff)
597                 return false;
598 
599         return val & (1 << 3);
600 }
601 
602 
603 static inline bool ata_id_has_fua(const u16 *id)
604 {
605         if ((id[ATA_ID_CFSSE] & 0xC000) != 0x4000)
606                 return false;
607         return id[ATA_ID_CFSSE] & (1 << 6);
608 }
609 
610 static inline bool ata_id_has_flush(const u16 *id)
611 {
612         if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
613                 return false;
614         return id[ATA_ID_COMMAND_SET_2] & (1 << 12);
615 }
616 
617 static inline bool ata_id_flush_enabled(const u16 *id)
618 {
619         if (ata_id_has_flush(id) == 0)
620                 return false;
621         if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
622                 return false;
623         return id[ATA_ID_CFS_ENABLE_2] & (1 << 12);
624 }
625 
626 static inline bool ata_id_has_flush_ext(const u16 *id)
627 {
628         if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
629                 return false;
630         return id[ATA_ID_COMMAND_SET_2] & (1 << 13);
631 }
632 
633 static inline bool ata_id_flush_ext_enabled(const u16 *id)
634 {
635         if (ata_id_has_flush_ext(id) == 0)
636                 return false;
637         if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
638                 return false;
639         /*
640          * some Maxtor disks have bit 13 defined incorrectly
641          * so check bit 10 too
642          */
643         return (id[ATA_ID_CFS_ENABLE_2] & 0x2400) == 0x2400;
644 }
645 
646 static inline u32 ata_id_logical_sector_size(const u16 *id)
647 {
648         /* T13/1699-D Revision 6a, Sep 6, 2008. Page 128.
649          * IDENTIFY DEVICE data, word 117-118.
650          * 0xd000 ignores bit 13 (logical:physical > 1)
651          */
652         if ((id[ATA_ID_SECTOR_SIZE] & 0xd000) == 0x5000)
653                 return (((id[ATA_ID_LOGICAL_SECTOR_SIZE+1] << 16)
654                          + id[ATA_ID_LOGICAL_SECTOR_SIZE]) * sizeof(u16)) ;
655         return ATA_SECT_SIZE;
656 }
657 
658 static inline u8 ata_id_log2_per_physical_sector(const u16 *id)
659 {
660         /* T13/1699-D Revision 6a, Sep 6, 2008. Page 128.
661          * IDENTIFY DEVICE data, word 106.
662          * 0xe000 ignores bit 12 (logical sector > 512 bytes)
663          */
664         if ((id[ATA_ID_SECTOR_SIZE] & 0xe000) == 0x6000)
665                 return (id[ATA_ID_SECTOR_SIZE] & 0xf);
666         return 0;
667 }
668 
669 /* Offset of logical sectors relative to physical sectors.
670  *
671  * If device has more than one logical sector per physical sector
672  * (aka 512 byte emulation), vendors might offset the "sector 0" address
673  * so sector 63 is "naturally aligned" - e.g. FAT partition table.
674  * This avoids Read/Mod/Write penalties when using FAT partition table
675  * and updating "well aligned" (FS perspective) physical sectors on every
676  * transaction.
677  */
678 static inline u16 ata_id_logical_sector_offset(const u16 *id,
679          u8 log2_per_phys)
680 {
681         u16 word_209 = id[209];
682 
683         if ((log2_per_phys > 1) && (word_209 & 0xc000) == 0x4000) {
684                 u16 first = word_209 & 0x3fff;
685                 if (first > 0)
686                         return (1 << log2_per_phys) - first;
687         }
688         return 0;
689 }
690 
691 static inline bool ata_id_has_lba48(const u16 *id)
692 {
693         if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
694                 return false;
695         if (!ata_id_u64(id, ATA_ID_LBA_CAPACITY_2))
696                 return false;
697         return id[ATA_ID_COMMAND_SET_2] & (1 << 10);
698 }
699 
700 static inline bool ata_id_lba48_enabled(const u16 *id)
701 {
702         if (ata_id_has_lba48(id) == 0)
703                 return false;
704         if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
705                 return false;
706         return id[ATA_ID_CFS_ENABLE_2] & (1 << 10);
707 }
708 
709 static inline bool ata_id_hpa_enabled(const u16 *id)
710 {
711         /* Yes children, word 83 valid bits cover word 82 data */
712         if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
713                 return false;
714         /* And 87 covers 85-87 */
715         if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
716                 return false;
717         /* Check command sets enabled as well as supported */
718         if ((id[ATA_ID_CFS_ENABLE_1] & (1 << 10)) == 0)
719                 return false;
720         return id[ATA_ID_COMMAND_SET_1] & (1 << 10);
721 }
722 
723 static inline bool ata_id_has_wcache(const u16 *id)
724 {
725         /* Yes children, word 83 valid bits cover word 82 data */
726         if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
727                 return false;
728         return id[ATA_ID_COMMAND_SET_1] & (1 << 5);
729 }
730 
731 static inline bool ata_id_has_pm(const u16 *id)
732 {
733         if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
734                 return false;
735         return id[ATA_ID_COMMAND_SET_1] & (1 << 3);
736 }
737 
738 static inline bool ata_id_rahead_enabled(const u16 *id)
739 {
740         if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
741                 return false;
742         return id[ATA_ID_CFS_ENABLE_1] & (1 << 6);
743 }
744 
745 static inline bool ata_id_wcache_enabled(const u16 *id)
746 {
747         if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
748                 return false;
749         return id[ATA_ID_CFS_ENABLE_1] & (1 << 5);
750 }
751 
752 /**
753  *      ata_id_major_version    -       get ATA level of drive
754  *      @id: Identify data
755  *
756  *      Caveats:
757  *              ATA-1 considers identify optional
758  *              ATA-2 introduces mandatory identify
759  *              ATA-3 introduces word 80 and accurate reporting
760  *
761  *      The practical impact of this is that ata_id_major_version cannot
762  *      reliably report on drives below ATA3.
763  */
764 
765 static inline unsigned int ata_id_major_version(const u16 *id)
766 {
767         unsigned int mver;
768 
769         if (id[ATA_ID_MAJOR_VER] == 0xFFFF)
770                 return 0;
771 
772         for (mver = 14; mver >= 1; mver--)
773                 if (id[ATA_ID_MAJOR_VER] & (1 << mver))
774                         break;
775         return mver;
776 }
777 
778 static inline bool ata_id_is_sata(const u16 *id)
779 {
780         /*
781          * See if word 93 is 0 AND drive is at least ATA-5 compatible
782          * verifying that word 80 by casting it to a signed type --
783          * this trick allows us to filter out the reserved values of
784          * 0x0000 and 0xffff along with the earlier ATA revisions...
785          */
786         if (id[ATA_ID_HW_CONFIG] == 0 && (short)id[ATA_ID_MAJOR_VER] >= 0x0020)
787                 return true;
788         return false;
789 }
790 
791 static inline bool ata_id_has_tpm(const u16 *id)
792 {
793         /* The TPM bits are only valid on ATA8 */
794         if (ata_id_major_version(id) < 8)
795                 return false;
796         if ((id[48] & 0xC000) != 0x4000)
797                 return false;
798         return id[48] & (1 << 0);
799 }
800 
801 static inline bool ata_id_has_dword_io(const u16 *id)
802 {
803         /* ATA 8 reuses this flag for "trusted" computing */
804         if (ata_id_major_version(id) > 7)
805                 return false;
806         return id[ATA_ID_DWORD_IO] & (1 << 0);
807 }
808 
809 static inline bool ata_id_has_unload(const u16 *id)
810 {
811         if (ata_id_major_version(id) >= 7 &&
812             (id[ATA_ID_CFSSE] & 0xC000) == 0x4000 &&
813             id[ATA_ID_CFSSE] & (1 << 13))
814                 return true;
815         return false;
816 }
817 
818 static inline bool ata_id_has_wwn(const u16 *id)
819 {
820         return (id[ATA_ID_CSF_DEFAULT] & 0xC100) == 0x4100;
821 }
822 
823 static inline int ata_id_form_factor(const u16 *id)
824 {
825         u16 val = id[168];
826 
827         if (ata_id_major_version(id) < 7 || val == 0 || val == 0xffff)
828                 return 0;
829 
830         val &= 0xf;
831 
832         if (val > 5)
833                 return 0;
834 
835         return val;
836 }
837 
838 static inline int ata_id_rotation_rate(const u16 *id)
839 {
840         u16 val = id[217];
841 
842         if (ata_id_major_version(id) < 7 || val == 0 || val == 0xffff)
843                 return 0;
844 
845         if (val > 1 && val < 0x401)
846                 return 0;
847 
848         return val;
849 }
850 
851 static inline bool ata_id_has_trim(const u16 *id)
852 {
853         if (ata_id_major_version(id) >= 7 &&
854             (id[ATA_ID_DATA_SET_MGMT] & 1))
855                 return true;
856         return false;
857 }
858 
859 static inline bool ata_id_has_zero_after_trim(const u16 *id)
860 {
861         /* DSM supported, deterministic read, and read zero after trim set */
862         if (ata_id_has_trim(id) &&
863             (id[ATA_ID_ADDITIONAL_SUPP] & 0x4020) == 0x4020)
864                 return true;
865 
866         return false;
867 }
868 
869 static inline bool ata_id_current_chs_valid(const u16 *id)
870 {
871         /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command
872            has not been issued to the device then the values of
873            id[ATA_ID_CUR_CYLS] to id[ATA_ID_CUR_SECTORS] are vendor specific. */
874         return (id[ATA_ID_FIELD_VALID] & 1) && /* Current translation valid */
875                 id[ATA_ID_CUR_CYLS] &&  /* cylinders in current translation */
876                 id[ATA_ID_CUR_HEADS] &&  /* heads in current translation */
877                 id[ATA_ID_CUR_HEADS] <= 16 &&
878                 id[ATA_ID_CUR_SECTORS];    /* sectors in current translation */
879 }
880 
881 static inline bool ata_id_is_cfa(const u16 *id)
882 {
883         if ((id[ATA_ID_CONFIG] == 0x848A) ||    /* Traditional CF */
884             (id[ATA_ID_CONFIG] == 0x844A))      /* Delkin Devices CF */
885                 return true;
886         /*
887          * CF specs don't require specific value in the word 0 anymore and yet
888          * they forbid to report the ATA version in the word 80 and require the
889          * CFA feature set support to be indicated in the word 83 in this case.
890          * Unfortunately, some cards only follow either of this requirements,
891          * and while those that don't indicate CFA feature support need some
892          * sort of quirk list, it seems impractical for the ones that do...
893          */
894         return (id[ATA_ID_COMMAND_SET_2] & 0xC004) == 0x4004;
895 }
896 
897 static inline bool ata_id_is_ssd(const u16 *id)
898 {
899         return id[ATA_ID_ROT_SPEED] == 0x01;
900 }
901 
902 static inline bool ata_id_pio_need_iordy(const u16 *id, const u8 pio)
903 {
904         /* CF spec. r4.1 Table 22 says no IORDY on PIO5 and PIO6. */
905         if (pio > 4 && ata_id_is_cfa(id))
906                 return false;
907         /* For PIO3 and higher it is mandatory. */
908         if (pio > 2)
909                 return true;
910         /* Turn it on when possible. */
911         return ata_id_has_iordy(id);
912 }
913 
914 static inline bool ata_drive_40wire(const u16 *dev_id)
915 {
916         if (ata_id_is_sata(dev_id))
917                 return false;   /* SATA */
918         if ((dev_id[ATA_ID_HW_CONFIG] & 0xE000) == 0x6000)
919                 return false;   /* 80 wire */
920         return true;
921 }
922 
923 static inline bool ata_drive_40wire_relaxed(const u16 *dev_id)
924 {
925         if ((dev_id[ATA_ID_HW_CONFIG] & 0x2000) == 0x2000)
926                 return false;   /* 80 wire */
927         return true;
928 }
929 
930 static inline int atapi_cdb_len(const u16 *dev_id)
931 {
932         u16 tmp = dev_id[ATA_ID_CONFIG] & 0x3;
933         switch (tmp) {
934         case 0:         return 12;
935         case 1:         return 16;
936         default:        return -1;
937         }
938 }
939 
940 static inline int atapi_command_packet_set(const u16 *dev_id)
941 {
942         return (dev_id[ATA_ID_CONFIG] >> 8) & 0x1f;
943 }
944 
945 static inline bool atapi_id_dmadir(const u16 *dev_id)
946 {
947         return ata_id_major_version(dev_id) >= 7 && (dev_id[62] & 0x8000);
948 }
949 
950 /*
951  * ata_id_is_lba_capacity_ok() performs a sanity check on
952  * the claimed LBA capacity value for the device.
953  *
954  * Returns 1 if LBA capacity looks sensible, 0 otherwise.
955  *
956  * It is called only once for each device.
957  */
958 static inline bool ata_id_is_lba_capacity_ok(u16 *id)
959 {
960         unsigned long lba_sects, chs_sects, head, tail;
961 
962         /* No non-LBA info .. so valid! */
963         if (id[ATA_ID_CYLS] == 0)
964                 return true;
965 
966         lba_sects = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
967 
968         /*
969          * The ATA spec tells large drives to return
970          * C/H/S = 16383/16/63 independent of their size.
971          * Some drives can be jumpered to use 15 heads instead of 16.
972          * Some drives can be jumpered to use 4092 cyls instead of 16383.
973          */
974         if ((id[ATA_ID_CYLS] == 16383 ||
975              (id[ATA_ID_CYLS] == 4092 && id[ATA_ID_CUR_CYLS] == 16383)) &&
976             id[ATA_ID_SECTORS] == 63 &&
977             (id[ATA_ID_HEADS] == 15 || id[ATA_ID_HEADS] == 16) &&
978             (lba_sects >= 16383 * 63 * id[ATA_ID_HEADS]))
979                 return true;
980 
981         chs_sects = id[ATA_ID_CYLS] * id[ATA_ID_HEADS] * id[ATA_ID_SECTORS];
982 
983         /* perform a rough sanity check on lba_sects: within 10% is OK */
984         if (lba_sects - chs_sects < chs_sects/10)
985                 return true;
986 
987         /* some drives have the word order reversed */
988         head = (lba_sects >> 16) & 0xffff;
989         tail = lba_sects & 0xffff;
990         lba_sects = head | (tail << 16);
991 
992         if (lba_sects - chs_sects < chs_sects/10) {
993                 *(__le32 *)&id[ATA_ID_LBA_CAPACITY] = __cpu_to_le32(lba_sects);
994                 return true;    /* LBA capacity is (now) good */
995         }
996 
997         return false;   /* LBA capacity value may be bad */
998 }
999 
1000 static inline void ata_id_to_hd_driveid(u16 *id)
1001 {
1002 #ifdef __BIG_ENDIAN
1003         /* accessed in struct hd_driveid as 8-bit values */
1004         id[ATA_ID_MAX_MULTSECT]  = __cpu_to_le16(id[ATA_ID_MAX_MULTSECT]);
1005         id[ATA_ID_CAPABILITY]    = __cpu_to_le16(id[ATA_ID_CAPABILITY]);
1006         id[ATA_ID_OLD_PIO_MODES] = __cpu_to_le16(id[ATA_ID_OLD_PIO_MODES]);
1007         id[ATA_ID_OLD_DMA_MODES] = __cpu_to_le16(id[ATA_ID_OLD_DMA_MODES]);
1008         id[ATA_ID_MULTSECT]      = __cpu_to_le16(id[ATA_ID_MULTSECT]);
1009 
1010         /* as 32-bit values */
1011         *(u32 *)&id[ATA_ID_LBA_CAPACITY] = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
1012         *(u32 *)&id[ATA_ID_SPG]          = ata_id_u32(id, ATA_ID_SPG);
1013 
1014         /* as 64-bit value */
1015         *(u64 *)&id[ATA_ID_LBA_CAPACITY_2] =
1016                 ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
1017 #endif
1018 }
1019 
1020 /*
1021  * Write LBA Range Entries to the buffer that will cover the extent from
1022  * sector to sector + count.  This is used for TRIM and for ADD LBA(S)
1023  * TO NV CACHE PINNED SET.
1024  */
1025 static inline unsigned ata_set_lba_range_entries(void *_buffer,
1026                 unsigned buf_size, u64 sector, unsigned long count)
1027 {
1028         __le64 *buffer = _buffer;
1029         unsigned i = 0, used_bytes;
1030 
1031         while (i < buf_size / 8 ) { /* 6-byte LBA + 2-byte range per entry */
1032                 u64 entry = sector |
1033                         ((u64)(count > 0xffff ? 0xffff : count) << 48);
1034                 buffer[i++] = __cpu_to_le64(entry);
1035                 if (count <= 0xffff)
1036                         break;
1037                 count -= 0xffff;
1038                 sector += 0xffff;
1039         }
1040 
1041         used_bytes = ALIGN(i * 8, 512);
1042         memset(buffer + i, 0, used_bytes - i * 8);
1043         return used_bytes;
1044 }
1045 
1046 static inline int is_multi_taskfile(struct ata_taskfile *tf)
1047 {
1048         return (tf->command == ATA_CMD_READ_MULTI) ||
1049                (tf->command == ATA_CMD_WRITE_MULTI) ||
1050                (tf->command == ATA_CMD_READ_MULTI_EXT) ||
1051                (tf->command == ATA_CMD_WRITE_MULTI_EXT) ||
1052                (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
1053 }
1054 
1055 static inline bool ata_ok(u8 status)
1056 {
1057         return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))
1058                         == ATA_DRDY);
1059 }
1060 
1061 static inline bool lba_28_ok(u64 block, u32 n_block)
1062 {
1063         /* check the ending block number: must be LESS THAN 0x0fffffff */
1064         return ((block + n_block) < ((1 << 28) - 1)) && (n_block <= 256);
1065 }
1066 
1067 static inline bool lba_48_ok(u64 block, u32 n_block)
1068 {
1069         /* check the ending block number */
1070         return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= 65536);
1071 }
1072 
1073 #define sata_pmp_gscr_vendor(gscr)      ((gscr)[SATA_PMP_GSCR_PROD_ID] & 0xffff)
1074 #define sata_pmp_gscr_devid(gscr)       ((gscr)[SATA_PMP_GSCR_PROD_ID] >> 16)
1075 #define sata_pmp_gscr_rev(gscr)         (((gscr)[SATA_PMP_GSCR_REV] >> 8) & 0xff)
1076 #define sata_pmp_gscr_ports(gscr)       ((gscr)[SATA_PMP_GSCR_PORT_INFO] & 0xf)
1077 
1078 #endif /* __LINUX_ATA_H__ */
1079 

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