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ata: define enum constants for IDENTIFY DEVICE
[deliverable/linux.git] / 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
41enum {
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_SATA_CAPABILITY = 76,
81 ATA_ID_SATA_CAPABILITY_2 = 77,
82 ATA_ID_FEATURE_SUPP = 78,
83 ATA_ID_MAJOR_VER = 80,
84 ATA_ID_COMMAND_SET_1 = 82,
85 ATA_ID_COMMAND_SET_2 = 83,
86 ATA_ID_CFSSE = 84,
87 ATA_ID_CFS_ENABLE_1 = 85,
88 ATA_ID_CFS_ENABLE_2 = 86,
89 ATA_ID_CSF_DEFAULT = 87,
90 ATA_ID_UDMA_MODES = 88,
91 ATA_ID_HW_CONFIG = 93,
92 ATA_ID_SPG = 98,
93 ATA_ID_LBA_CAPACITY_2 = 100,
94 ATA_ID_SECTOR_SIZE = 106,
95 ATA_ID_WWN = 108,
96 ATA_ID_LOGICAL_SECTOR_SIZE = 117, /* and 118 */
97 ATA_ID_LAST_LUN = 126,
98 ATA_ID_DLF = 128,
99 ATA_ID_CSFO = 129,
100 ATA_ID_CFA_POWER = 160,
101 ATA_ID_CFA_KEY_MGMT = 162,
102 ATA_ID_CFA_MODES = 163,
103 ATA_ID_DATA_SET_MGMT = 169,
104 ATA_ID_ROT_SPEED = 217,
105 ATA_ID_PIO4 = (1 << 1),
106
107 ATA_ID_SERNO_LEN = 20,
108 ATA_ID_FW_REV_LEN = 8,
109 ATA_ID_PROD_LEN = 40,
110 ATA_ID_WWN_LEN = 8,
111
112 ATA_PCI_CTL_OFS = 2,
113
114 ATA_PIO0 = (1 << 0),
115 ATA_PIO1 = ATA_PIO0 | (1 << 1),
116 ATA_PIO2 = ATA_PIO1 | (1 << 2),
117 ATA_PIO3 = ATA_PIO2 | (1 << 3),
118 ATA_PIO4 = ATA_PIO3 | (1 << 4),
119 ATA_PIO5 = ATA_PIO4 | (1 << 5),
120 ATA_PIO6 = ATA_PIO5 | (1 << 6),
121
122 ATA_PIO4_ONLY = (1 << 4),
123
124 ATA_SWDMA0 = (1 << 0),
125 ATA_SWDMA1 = ATA_SWDMA0 | (1 << 1),
126 ATA_SWDMA2 = ATA_SWDMA1 | (1 << 2),
127
128 ATA_SWDMA2_ONLY = (1 << 2),
129
130 ATA_MWDMA0 = (1 << 0),
131 ATA_MWDMA1 = ATA_MWDMA0 | (1 << 1),
132 ATA_MWDMA2 = ATA_MWDMA1 | (1 << 2),
133 ATA_MWDMA3 = ATA_MWDMA2 | (1 << 3),
134 ATA_MWDMA4 = ATA_MWDMA3 | (1 << 4),
135
136 ATA_MWDMA12_ONLY = (1 << 1) | (1 << 2),
137 ATA_MWDMA2_ONLY = (1 << 2),
138
139 ATA_UDMA0 = (1 << 0),
140 ATA_UDMA1 = ATA_UDMA0 | (1 << 1),
141 ATA_UDMA2 = ATA_UDMA1 | (1 << 2),
142 ATA_UDMA3 = ATA_UDMA2 | (1 << 3),
143 ATA_UDMA4 = ATA_UDMA3 | (1 << 4),
144 ATA_UDMA5 = ATA_UDMA4 | (1 << 5),
145 ATA_UDMA6 = ATA_UDMA5 | (1 << 6),
146 ATA_UDMA7 = ATA_UDMA6 | (1 << 7),
147 /* ATA_UDMA7 is just for completeness... doesn't exist (yet?). */
148
149 ATA_UDMA24_ONLY = (1 << 2) | (1 << 4),
150
151 ATA_UDMA_MASK_40C = ATA_UDMA2, /* udma0-2 */
152
153 /* DMA-related */
154 ATA_PRD_SZ = 8,
155 ATA_PRD_TBL_SZ = (ATA_MAX_PRD * ATA_PRD_SZ),
156 ATA_PRD_EOT = (1 << 31), /* end-of-table flag */
157
158 ATA_DMA_TABLE_OFS = 4,
159 ATA_DMA_STATUS = 2,
160 ATA_DMA_CMD = 0,
161 ATA_DMA_WR = (1 << 3),
162 ATA_DMA_START = (1 << 0),
163 ATA_DMA_INTR = (1 << 2),
164 ATA_DMA_ERR = (1 << 1),
165 ATA_DMA_ACTIVE = (1 << 0),
166
167 /* bits in ATA command block registers */
168 ATA_HOB = (1 << 7), /* LBA48 selector */
169 ATA_NIEN = (1 << 1), /* disable-irq flag */
170 ATA_LBA = (1 << 6), /* LBA28 selector */
171 ATA_DEV1 = (1 << 4), /* Select Device 1 (slave) */
172 ATA_DEVICE_OBS = (1 << 7) | (1 << 5), /* obs bits in dev reg */
173 ATA_DEVCTL_OBS = (1 << 3), /* obsolete bit in devctl reg */
174 ATA_BUSY = (1 << 7), /* BSY status bit */
175 ATA_DRDY = (1 << 6), /* device ready */
176 ATA_DF = (1 << 5), /* device fault */
177 ATA_DSC = (1 << 4), /* drive seek complete */
178 ATA_DRQ = (1 << 3), /* data request i/o */
179 ATA_CORR = (1 << 2), /* corrected data error */
180 ATA_IDX = (1 << 1), /* index */
181 ATA_ERR = (1 << 0), /* have an error */
182 ATA_SRST = (1 << 2), /* software reset */
183 ATA_ICRC = (1 << 7), /* interface CRC error */
184 ATA_BBK = ATA_ICRC, /* pre-EIDE: block marked bad */
185 ATA_UNC = (1 << 6), /* uncorrectable media error */
186 ATA_MC = (1 << 5), /* media changed */
187 ATA_IDNF = (1 << 4), /* ID not found */
188 ATA_MCR = (1 << 3), /* media change requested */
189 ATA_ABORTED = (1 << 2), /* command aborted */
190 ATA_TRK0NF = (1 << 1), /* track 0 not found */
191 ATA_AMNF = (1 << 0), /* address mark not found */
192 ATAPI_LFS = 0xF0, /* last failed sense */
193 ATAPI_EOM = ATA_TRK0NF, /* end of media */
194 ATAPI_ILI = ATA_AMNF, /* illegal length indication */
195 ATAPI_IO = (1 << 1),
196 ATAPI_COD = (1 << 0),
197
198 /* ATA command block registers */
199 ATA_REG_DATA = 0x00,
200 ATA_REG_ERR = 0x01,
201 ATA_REG_NSECT = 0x02,
202 ATA_REG_LBAL = 0x03,
203 ATA_REG_LBAM = 0x04,
204 ATA_REG_LBAH = 0x05,
205 ATA_REG_DEVICE = 0x06,
206 ATA_REG_STATUS = 0x07,
207
208 ATA_REG_FEATURE = ATA_REG_ERR, /* and their aliases */
209 ATA_REG_CMD = ATA_REG_STATUS,
210 ATA_REG_BYTEL = ATA_REG_LBAM,
211 ATA_REG_BYTEH = ATA_REG_LBAH,
212 ATA_REG_DEVSEL = ATA_REG_DEVICE,
213 ATA_REG_IRQ = ATA_REG_NSECT,
214
215 /* ATA device commands */
216 ATA_CMD_DEV_RESET = 0x08, /* ATAPI device reset */
217 ATA_CMD_CHK_POWER = 0xE5, /* check power mode */
218 ATA_CMD_STANDBY = 0xE2, /* place in standby power mode */
219 ATA_CMD_IDLE = 0xE3, /* place in idle power mode */
220 ATA_CMD_EDD = 0x90, /* execute device diagnostic */
221 ATA_CMD_DOWNLOAD_MICRO = 0x92,
222 ATA_CMD_NOP = 0x00,
223 ATA_CMD_FLUSH = 0xE7,
224 ATA_CMD_FLUSH_EXT = 0xEA,
225 ATA_CMD_ID_ATA = 0xEC,
226 ATA_CMD_ID_ATAPI = 0xA1,
227 ATA_CMD_SERVICE = 0xA2,
228 ATA_CMD_READ = 0xC8,
229 ATA_CMD_READ_EXT = 0x25,
230 ATA_CMD_READ_QUEUED = 0x26,
231 ATA_CMD_READ_STREAM_EXT = 0x2B,
232 ATA_CMD_READ_STREAM_DMA_EXT = 0x2A,
233 ATA_CMD_WRITE = 0xCA,
234 ATA_CMD_WRITE_EXT = 0x35,
235 ATA_CMD_WRITE_QUEUED = 0x36,
236 ATA_CMD_WRITE_STREAM_EXT = 0x3B,
237 ATA_CMD_WRITE_STREAM_DMA_EXT = 0x3A,
238 ATA_CMD_WRITE_FUA_EXT = 0x3D,
239 ATA_CMD_WRITE_QUEUED_FUA_EXT = 0x3E,
240 ATA_CMD_FPDMA_READ = 0x60,
241 ATA_CMD_FPDMA_WRITE = 0x61,
242 ATA_CMD_PIO_READ = 0x20,
243 ATA_CMD_PIO_READ_EXT = 0x24,
244 ATA_CMD_PIO_WRITE = 0x30,
245 ATA_CMD_PIO_WRITE_EXT = 0x34,
246 ATA_CMD_READ_MULTI = 0xC4,
247 ATA_CMD_READ_MULTI_EXT = 0x29,
248 ATA_CMD_WRITE_MULTI = 0xC5,
249 ATA_CMD_WRITE_MULTI_EXT = 0x39,
250 ATA_CMD_WRITE_MULTI_FUA_EXT = 0xCE,
251 ATA_CMD_SET_FEATURES = 0xEF,
252 ATA_CMD_SET_MULTI = 0xC6,
253 ATA_CMD_PACKET = 0xA0,
254 ATA_CMD_VERIFY = 0x40,
255 ATA_CMD_VERIFY_EXT = 0x42,
256 ATA_CMD_WRITE_UNCORR_EXT = 0x45,
257 ATA_CMD_STANDBYNOW1 = 0xE0,
258 ATA_CMD_IDLEIMMEDIATE = 0xE1,
259 ATA_CMD_SLEEP = 0xE6,
260 ATA_CMD_INIT_DEV_PARAMS = 0x91,
261 ATA_CMD_READ_NATIVE_MAX = 0xF8,
262 ATA_CMD_READ_NATIVE_MAX_EXT = 0x27,
263 ATA_CMD_SET_MAX = 0xF9,
264 ATA_CMD_SET_MAX_EXT = 0x37,
265 ATA_CMD_READ_LOG_EXT = 0x2F,
266 ATA_CMD_WRITE_LOG_EXT = 0x3F,
267 ATA_CMD_READ_LOG_DMA_EXT = 0x47,
268 ATA_CMD_WRITE_LOG_DMA_EXT = 0x57,
269 ATA_CMD_TRUSTED_RCV = 0x5C,
270 ATA_CMD_TRUSTED_RCV_DMA = 0x5D,
271 ATA_CMD_TRUSTED_SND = 0x5E,
272 ATA_CMD_TRUSTED_SND_DMA = 0x5F,
273 ATA_CMD_PMP_READ = 0xE4,
274 ATA_CMD_PMP_WRITE = 0xE8,
275 ATA_CMD_CONF_OVERLAY = 0xB1,
276 ATA_CMD_SEC_SET_PASS = 0xF1,
277 ATA_CMD_SEC_UNLOCK = 0xF2,
278 ATA_CMD_SEC_ERASE_PREP = 0xF3,
279 ATA_CMD_SEC_ERASE_UNIT = 0xF4,
280 ATA_CMD_SEC_FREEZE_LOCK = 0xF5,
281 ATA_CMD_SEC_DISABLE_PASS = 0xF6,
282 ATA_CMD_CONFIG_STREAM = 0x51,
283 ATA_CMD_SMART = 0xB0,
284 ATA_CMD_MEDIA_LOCK = 0xDE,
285 ATA_CMD_MEDIA_UNLOCK = 0xDF,
286 ATA_CMD_DSM = 0x06,
287 ATA_CMD_CHK_MED_CRD_TYP = 0xD1,
288 ATA_CMD_CFA_REQ_EXT_ERR = 0x03,
289 ATA_CMD_CFA_WRITE_NE = 0x38,
290 ATA_CMD_CFA_TRANS_SECT = 0x87,
291 ATA_CMD_CFA_ERASE = 0xC0,
292 ATA_CMD_CFA_WRITE_MULT_NE = 0xCD,
293 /* marked obsolete in the ATA/ATAPI-7 spec */
294 ATA_CMD_RESTORE = 0x10,
295
296 /* READ_LOG_EXT pages */
297 ATA_LOG_SATA_NCQ = 0x10,
298
299 /* READ/WRITE LONG (obsolete) */
300 ATA_CMD_READ_LONG = 0x22,
301 ATA_CMD_READ_LONG_ONCE = 0x23,
302 ATA_CMD_WRITE_LONG = 0x32,
303 ATA_CMD_WRITE_LONG_ONCE = 0x33,
304
305 /* SETFEATURES stuff */
306 SETFEATURES_XFER = 0x03,
307 XFER_UDMA_7 = 0x47,
308 XFER_UDMA_6 = 0x46,
309 XFER_UDMA_5 = 0x45,
310 XFER_UDMA_4 = 0x44,
311 XFER_UDMA_3 = 0x43,
312 XFER_UDMA_2 = 0x42,
313 XFER_UDMA_1 = 0x41,
314 XFER_UDMA_0 = 0x40,
315 XFER_MW_DMA_4 = 0x24, /* CFA only */
316 XFER_MW_DMA_3 = 0x23, /* CFA only */
317 XFER_MW_DMA_2 = 0x22,
318 XFER_MW_DMA_1 = 0x21,
319 XFER_MW_DMA_0 = 0x20,
320 XFER_SW_DMA_2 = 0x12,
321 XFER_SW_DMA_1 = 0x11,
322 XFER_SW_DMA_0 = 0x10,
323 XFER_PIO_6 = 0x0E, /* CFA only */
324 XFER_PIO_5 = 0x0D, /* CFA only */
325 XFER_PIO_4 = 0x0C,
326 XFER_PIO_3 = 0x0B,
327 XFER_PIO_2 = 0x0A,
328 XFER_PIO_1 = 0x09,
329 XFER_PIO_0 = 0x08,
330 XFER_PIO_SLOW = 0x00,
331
332 SETFEATURES_WC_ON = 0x02, /* Enable write cache */
333 SETFEATURES_WC_OFF = 0x82, /* Disable write cache */
334
335 /* Enable/Disable Automatic Acoustic Management */
336 SETFEATURES_AAM_ON = 0x42,
337 SETFEATURES_AAM_OFF = 0xC2,
338
339 SETFEATURES_SPINUP = 0x07, /* Spin-up drive */
340
341 SETFEATURES_SATA_ENABLE = 0x10, /* Enable use of SATA feature */
342 SETFEATURES_SATA_DISABLE = 0x90, /* Disable use of SATA feature */
343
344 /* SETFEATURE Sector counts for SATA features */
345 SATA_FPDMA_OFFSET = 0x01, /* FPDMA non-zero buffer offsets */
346 SATA_FPDMA_AA = 0x02, /* FPDMA Setup FIS Auto-Activate */
347 SATA_DIPM = 0x03, /* Device Initiated Power Management */
348 SATA_FPDMA_IN_ORDER = 0x04, /* FPDMA in-order data delivery */
349 SATA_AN = 0x05, /* Asynchronous Notification */
350 SATA_SSP = 0x06, /* Software Settings Preservation */
351
352 /* feature values for SET_MAX */
353 ATA_SET_MAX_ADDR = 0x00,
354 ATA_SET_MAX_PASSWD = 0x01,
355 ATA_SET_MAX_LOCK = 0x02,
356 ATA_SET_MAX_UNLOCK = 0x03,
357 ATA_SET_MAX_FREEZE_LOCK = 0x04,
358
359 /* feature values for DEVICE CONFIGURATION OVERLAY */
360 ATA_DCO_RESTORE = 0xC0,
361 ATA_DCO_FREEZE_LOCK = 0xC1,
362 ATA_DCO_IDENTIFY = 0xC2,
363 ATA_DCO_SET = 0xC3,
364
365 /* feature values for SMART */
366 ATA_SMART_ENABLE = 0xD8,
367 ATA_SMART_READ_VALUES = 0xD0,
368 ATA_SMART_READ_THRESHOLDS = 0xD1,
369
370 /* feature values for Data Set Management */
371 ATA_DSM_TRIM = 0x01,
372
373 /* password used in LBA Mid / LBA High for executing SMART commands */
374 ATA_SMART_LBAM_PASS = 0x4F,
375 ATA_SMART_LBAH_PASS = 0xC2,
376
377 /* ATAPI stuff */
378 ATAPI_PKT_DMA = (1 << 0),
379 ATAPI_DMADIR = (1 << 2), /* ATAPI data dir:
380 0=to device, 1=to host */
381 ATAPI_CDB_LEN = 16,
382
383 /* PMP stuff */
384 SATA_PMP_MAX_PORTS = 15,
385 SATA_PMP_CTRL_PORT = 15,
386
387 SATA_PMP_GSCR_DWORDS = 128,
388 SATA_PMP_GSCR_PROD_ID = 0,
389 SATA_PMP_GSCR_REV = 1,
390 SATA_PMP_GSCR_PORT_INFO = 2,
391 SATA_PMP_GSCR_ERROR = 32,
392 SATA_PMP_GSCR_ERROR_EN = 33,
393 SATA_PMP_GSCR_FEAT = 64,
394 SATA_PMP_GSCR_FEAT_EN = 96,
395
396 SATA_PMP_PSCR_STATUS = 0,
397 SATA_PMP_PSCR_ERROR = 1,
398 SATA_PMP_PSCR_CONTROL = 2,
399
400 SATA_PMP_FEAT_BIST = (1 << 0),
401 SATA_PMP_FEAT_PMREQ = (1 << 1),
402 SATA_PMP_FEAT_DYNSSC = (1 << 2),
403 SATA_PMP_FEAT_NOTIFY = (1 << 3),
404
405 /* cable types */
406 ATA_CBL_NONE = 0,
407 ATA_CBL_PATA40 = 1,
408 ATA_CBL_PATA80 = 2,
409 ATA_CBL_PATA40_SHORT = 3, /* 40 wire cable to high UDMA spec */
410 ATA_CBL_PATA_UNK = 4, /* don't know, maybe 80c? */
411 ATA_CBL_PATA_IGN = 5, /* don't know, ignore cable handling */
412 ATA_CBL_SATA = 6,
413
414 /* SATA Status and Control Registers */
415 SCR_STATUS = 0,
416 SCR_ERROR = 1,
417 SCR_CONTROL = 2,
418 SCR_ACTIVE = 3,
419 SCR_NOTIFICATION = 4,
420
421 /* SError bits */
422 SERR_DATA_RECOVERED = (1 << 0), /* recovered data error */
423 SERR_COMM_RECOVERED = (1 << 1), /* recovered comm failure */
424 SERR_DATA = (1 << 8), /* unrecovered data error */
425 SERR_PERSISTENT = (1 << 9), /* persistent data/comm error */
426 SERR_PROTOCOL = (1 << 10), /* protocol violation */
427 SERR_INTERNAL = (1 << 11), /* host internal error */
428 SERR_PHYRDY_CHG = (1 << 16), /* PHY RDY changed */
429 SERR_PHY_INT_ERR = (1 << 17), /* PHY internal error */
430 SERR_COMM_WAKE = (1 << 18), /* Comm wake */
431 SERR_10B_8B_ERR = (1 << 19), /* 10b to 8b decode error */
432 SERR_DISPARITY = (1 << 20), /* Disparity */
433 SERR_CRC = (1 << 21), /* CRC error */
434 SERR_HANDSHAKE = (1 << 22), /* Handshake error */
435 SERR_LINK_SEQ_ERR = (1 << 23), /* Link sequence error */
436 SERR_TRANS_ST_ERROR = (1 << 24), /* Transport state trans. error */
437 SERR_UNRECOG_FIS = (1 << 25), /* Unrecognized FIS */
438 SERR_DEV_XCHG = (1 << 26), /* device exchanged */
439
440 /* struct ata_taskfile flags */
441 ATA_TFLAG_LBA48 = (1 << 0), /* enable 48-bit LBA and "HOB" */
442 ATA_TFLAG_ISADDR = (1 << 1), /* enable r/w to nsect/lba regs */
443 ATA_TFLAG_DEVICE = (1 << 2), /* enable r/w to device reg */
444 ATA_TFLAG_WRITE = (1 << 3), /* data dir: host->dev==1 (write) */
445 ATA_TFLAG_LBA = (1 << 4), /* enable LBA */
446 ATA_TFLAG_FUA = (1 << 5), /* enable FUA */
447 ATA_TFLAG_POLLING = (1 << 6), /* set nIEN to 1 and use polling */
448
449 /* protocol flags */
450 ATA_PROT_FLAG_PIO = (1 << 0), /* is PIO */
451 ATA_PROT_FLAG_DMA = (1 << 1), /* is DMA */
452 ATA_PROT_FLAG_DATA = ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA,
453 ATA_PROT_FLAG_NCQ = (1 << 2), /* is NCQ */
454 ATA_PROT_FLAG_ATAPI = (1 << 3), /* is ATAPI */
455};
456
457enum ata_tf_protocols {
458 /* ATA taskfile protocols */
459 ATA_PROT_UNKNOWN, /* unknown/invalid */
460 ATA_PROT_NODATA, /* no data */
461 ATA_PROT_PIO, /* PIO data xfer */
462 ATA_PROT_DMA, /* DMA */
463 ATA_PROT_NCQ, /* NCQ */
464 ATAPI_PROT_NODATA, /* packet command, no data */
465 ATAPI_PROT_PIO, /* packet command, PIO data xfer*/
466 ATAPI_PROT_DMA, /* packet command with special DMA sauce */
467};
468
469enum ata_ioctls {
470 ATA_IOC_GET_IO32 = 0x309,
471 ATA_IOC_SET_IO32 = 0x324,
472};
473
474/* core structures */
475
476struct ata_bmdma_prd {
477 __le32 addr;
478 __le32 flags_len;
479};
480
481struct ata_taskfile {
482 unsigned long flags; /* ATA_TFLAG_xxx */
483 u8 protocol; /* ATA_PROT_xxx */
484
485 u8 ctl; /* control reg */
486
487 u8 hob_feature; /* additional data */
488 u8 hob_nsect; /* to support LBA48 */
489 u8 hob_lbal;
490 u8 hob_lbam;
491 u8 hob_lbah;
492
493 u8 feature;
494 u8 nsect;
495 u8 lbal;
496 u8 lbam;
497 u8 lbah;
498
499 u8 device;
500
501 u8 command; /* IO operation */
502};
503
504/*
505 * protocol tests
506 */
507static inline unsigned int ata_prot_flags(u8 prot)
508{
509 switch (prot) {
510 case ATA_PROT_NODATA:
511 return 0;
512 case ATA_PROT_PIO:
513 return ATA_PROT_FLAG_PIO;
514 case ATA_PROT_DMA:
515 return ATA_PROT_FLAG_DMA;
516 case ATA_PROT_NCQ:
517 return ATA_PROT_FLAG_DMA | ATA_PROT_FLAG_NCQ;
518 case ATAPI_PROT_NODATA:
519 return ATA_PROT_FLAG_ATAPI;
520 case ATAPI_PROT_PIO:
521 return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_PIO;
522 case ATAPI_PROT_DMA:
523 return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_DMA;
524 }
525 return 0;
526}
527
528static inline int ata_is_atapi(u8 prot)
529{
530 return ata_prot_flags(prot) & ATA_PROT_FLAG_ATAPI;
531}
532
533static inline int ata_is_nodata(u8 prot)
534{
535 return !(ata_prot_flags(prot) & ATA_PROT_FLAG_DATA);
536}
537
538static inline int ata_is_pio(u8 prot)
539{
540 return ata_prot_flags(prot) & ATA_PROT_FLAG_PIO;
541}
542
543static inline int ata_is_dma(u8 prot)
544{
545 return ata_prot_flags(prot) & ATA_PROT_FLAG_DMA;
546}
547
548static inline int ata_is_ncq(u8 prot)
549{
550 return ata_prot_flags(prot) & ATA_PROT_FLAG_NCQ;
551}
552
553static inline int ata_is_data(u8 prot)
554{
555 return ata_prot_flags(prot) & ATA_PROT_FLAG_DATA;
556}
557
558/*
559 * id tests
560 */
561#define ata_id_is_ata(id) (((id)[ATA_ID_CONFIG] & (1 << 15)) == 0)
562#define ata_id_has_lba(id) ((id)[ATA_ID_CAPABILITY] & (1 << 9))
563#define ata_id_has_dma(id) ((id)[ATA_ID_CAPABILITY] & (1 << 8))
564#define ata_id_has_ncq(id) ((id)[ATA_ID_SATA_CAPABILITY] & (1 << 8))
565#define ata_id_queue_depth(id) (((id)[ATA_ID_QUEUE_DEPTH] & 0x1f) + 1)
566#define ata_id_removeable(id) ((id)[ATA_ID_CONFIG] & (1 << 7))
567#define ata_id_has_atapi_AN(id) \
568 ((((id)[ATA_ID_SATA_CAPABILITY] != 0x0000) && \
569 ((id)[ATA_ID_SATA_CAPABILITY] != 0xffff)) && \
570 ((id)[ATA_ID_FEATURE_SUPP] & (1 << 5)))
571#define ata_id_has_fpdma_aa(id) \
572 ((((id)[ATA_ID_SATA_CAPABILITY] != 0x0000) && \
573 ((id)[ATA_ID_SATA_CAPABILITY] != 0xffff)) && \
574 ((id)[ATA_ID_FEATURE_SUPP] & (1 << 2)))
575#define ata_id_iordy_disable(id) ((id)[ATA_ID_CAPABILITY] & (1 << 10))
576#define ata_id_has_iordy(id) ((id)[ATA_ID_CAPABILITY] & (1 << 11))
577#define ata_id_u32(id,n) \
578 (((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
579#define ata_id_u64(id,n) \
580 ( ((u64) (id)[(n) + 3] << 48) | \
581 ((u64) (id)[(n) + 2] << 32) | \
582 ((u64) (id)[(n) + 1] << 16) | \
583 ((u64) (id)[(n) + 0]) )
584
585#define ata_id_cdb_intr(id) (((id)[ATA_ID_CONFIG] & 0x60) == 0x20)
586#define ata_id_has_da(id) ((id)[ATA_ID_SATA_CAPABILITY_2] & (1 << 4))
587
588static inline bool ata_id_has_hipm(const u16 *id)
589{
590 u16 val = id[ATA_ID_SATA_CAPABILITY];
591
592 if (val == 0 || val == 0xffff)
593 return false;
594
595 return val & (1 << 9);
596}
597
598static inline bool ata_id_has_dipm(const u16 *id)
599{
600 u16 val = id[ATA_ID_FEATURE_SUPP];
601
602 if (val == 0 || val == 0xffff)
603 return false;
604
605 return val & (1 << 3);
606}
607
608
609static inline bool ata_id_has_fua(const u16 *id)
610{
611 if ((id[ATA_ID_CFSSE] & 0xC000) != 0x4000)
612 return false;
613 return id[ATA_ID_CFSSE] & (1 << 6);
614}
615
616static inline bool ata_id_has_flush(const u16 *id)
617{
618 if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
619 return false;
620 return id[ATA_ID_COMMAND_SET_2] & (1 << 12);
621}
622
623static inline bool ata_id_flush_enabled(const u16 *id)
624{
625 if (ata_id_has_flush(id) == 0)
626 return false;
627 if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
628 return false;
629 return id[ATA_ID_CFS_ENABLE_2] & (1 << 12);
630}
631
632static inline bool ata_id_has_flush_ext(const u16 *id)
633{
634 if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
635 return false;
636 return id[ATA_ID_COMMAND_SET_2] & (1 << 13);
637}
638
639static inline bool ata_id_flush_ext_enabled(const u16 *id)
640{
641 if (ata_id_has_flush_ext(id) == 0)
642 return false;
643 if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
644 return false;
645 /*
646 * some Maxtor disks have bit 13 defined incorrectly
647 * so check bit 10 too
648 */
649 return (id[ATA_ID_CFS_ENABLE_2] & 0x2400) == 0x2400;
650}
651
652static inline u32 ata_id_logical_sector_size(const u16 *id)
653{
654 /* T13/1699-D Revision 6a, Sep 6, 2008. Page 128.
655 * IDENTIFY DEVICE data, word 117-118.
656 * 0xd000 ignores bit 13 (logical:physical > 1)
657 */
658 if ((id[ATA_ID_SECTOR_SIZE] & 0xd000) == 0x5000)
659 return (((id[ATA_ID_LOGICAL_SECTOR_SIZE+1] << 16)
660 + id[ATA_ID_LOGICAL_SECTOR_SIZE]) * sizeof(u16)) ;
661 return ATA_SECT_SIZE;
662}
663
664static inline u8 ata_id_log2_per_physical_sector(const u16 *id)
665{
666 /* T13/1699-D Revision 6a, Sep 6, 2008. Page 128.
667 * IDENTIFY DEVICE data, word 106.
668 * 0xe000 ignores bit 12 (logical sector > 512 bytes)
669 */
670 if ((id[ATA_ID_SECTOR_SIZE] & 0xe000) == 0x6000)
671 return (id[ATA_ID_SECTOR_SIZE] & 0xf);
672 return 0;
673}
674
675/* Offset of logical sectors relative to physical sectors.
676 *
677 * If device has more than one logical sector per physical sector
678 * (aka 512 byte emulation), vendors might offset the "sector 0" address
679 * so sector 63 is "naturally aligned" - e.g. FAT partition table.
680 * This avoids Read/Mod/Write penalties when using FAT partition table
681 * and updating "well aligned" (FS perspective) physical sectors on every
682 * transaction.
683 */
684static inline u16 ata_id_logical_sector_offset(const u16 *id,
685 u8 log2_per_phys)
686{
687 u16 word_209 = id[209];
688
689 if ((log2_per_phys > 1) && (word_209 & 0xc000) == 0x4000) {
690 u16 first = word_209 & 0x3fff;
691 if (first > 0)
692 return (1 << log2_per_phys) - first;
693 }
694 return 0;
695}
696
697static inline bool ata_id_has_lba48(const u16 *id)
698{
699 if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
700 return false;
701 if (!ata_id_u64(id, ATA_ID_LBA_CAPACITY_2))
702 return false;
703 return id[ATA_ID_COMMAND_SET_2] & (1 << 10);
704}
705
706static inline bool ata_id_lba48_enabled(const u16 *id)
707{
708 if (ata_id_has_lba48(id) == 0)
709 return false;
710 if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
711 return false;
712 return id[ATA_ID_CFS_ENABLE_2] & (1 << 10);
713}
714
715static inline bool ata_id_hpa_enabled(const u16 *id)
716{
717 /* Yes children, word 83 valid bits cover word 82 data */
718 if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
719 return false;
720 /* And 87 covers 85-87 */
721 if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
722 return false;
723 /* Check command sets enabled as well as supported */
724 if ((id[ATA_ID_CFS_ENABLE_1] & (1 << 10)) == 0)
725 return false;
726 return id[ATA_ID_COMMAND_SET_1] & (1 << 10);
727}
728
729static inline bool ata_id_has_wcache(const u16 *id)
730{
731 /* Yes children, word 83 valid bits cover word 82 data */
732 if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
733 return false;
734 return id[ATA_ID_COMMAND_SET_1] & (1 << 5);
735}
736
737static inline bool ata_id_has_pm(const u16 *id)
738{
739 if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
740 return false;
741 return id[ATA_ID_COMMAND_SET_1] & (1 << 3);
742}
743
744static inline bool ata_id_rahead_enabled(const u16 *id)
745{
746 if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
747 return false;
748 return id[ATA_ID_CFS_ENABLE_1] & (1 << 6);
749}
750
751static inline bool ata_id_wcache_enabled(const u16 *id)
752{
753 if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
754 return false;
755 return id[ATA_ID_CFS_ENABLE_1] & (1 << 5);
756}
757
758/**
759 * ata_id_major_version - get ATA level of drive
760 * @id: Identify data
761 *
762 * Caveats:
763 * ATA-1 considers identify optional
764 * ATA-2 introduces mandatory identify
765 * ATA-3 introduces word 80 and accurate reporting
766 *
767 * The practical impact of this is that ata_id_major_version cannot
768 * reliably report on drives below ATA3.
769 */
770
771static inline unsigned int ata_id_major_version(const u16 *id)
772{
773 unsigned int mver;
774
775 if (id[ATA_ID_MAJOR_VER] == 0xFFFF)
776 return 0;
777
778 for (mver = 14; mver >= 1; mver--)
779 if (id[ATA_ID_MAJOR_VER] & (1 << mver))
780 break;
781 return mver;
782}
783
784static inline bool ata_id_is_sata(const u16 *id)
785{
786 /*
787 * See if word 93 is 0 AND drive is at least ATA-5 compatible
788 * verifying that word 80 by casting it to a signed type --
789 * this trick allows us to filter out the reserved values of
790 * 0x0000 and 0xffff along with the earlier ATA revisions...
791 */
792 if (id[ATA_ID_HW_CONFIG] == 0 && (short)id[ATA_ID_MAJOR_VER] >= 0x0020)
793 return true;
794 return false;
795}
796
797static inline bool ata_id_has_tpm(const u16 *id)
798{
799 /* The TPM bits are only valid on ATA8 */
800 if (ata_id_major_version(id) < 8)
801 return false;
802 if ((id[48] & 0xC000) != 0x4000)
803 return false;
804 return id[48] & (1 << 0);
805}
806
807static inline bool ata_id_has_dword_io(const u16 *id)
808{
809 /* ATA 8 reuses this flag for "trusted" computing */
810 if (ata_id_major_version(id) > 7)
811 return false;
812 return id[ATA_ID_DWORD_IO] & (1 << 0);
813}
814
815static inline bool ata_id_has_unload(const u16 *id)
816{
817 if (ata_id_major_version(id) >= 7 &&
818 (id[ATA_ID_CFSSE] & 0xC000) == 0x4000 &&
819 id[ATA_ID_CFSSE] & (1 << 13))
820 return true;
821 return false;
822}
823
824static inline bool ata_id_has_wwn(const u16 *id)
825{
826 return (id[ATA_ID_CSF_DEFAULT] & 0xC100) == 0x4100;
827}
828
829static inline int ata_id_form_factor(const u16 *id)
830{
831 u16 val = id[168];
832
833 if (ata_id_major_version(id) < 7 || val == 0 || val == 0xffff)
834 return 0;
835
836 val &= 0xf;
837
838 if (val > 5)
839 return 0;
840
841 return val;
842}
843
844static inline int ata_id_rotation_rate(const u16 *id)
845{
846 u16 val = id[217];
847
848 if (ata_id_major_version(id) < 7 || val == 0 || val == 0xffff)
849 return 0;
850
851 if (val > 1 && val < 0x401)
852 return 0;
853
854 return val;
855}
856
857static inline bool ata_id_has_trim(const u16 *id)
858{
859 if (ata_id_major_version(id) >= 7 &&
860 (id[ATA_ID_DATA_SET_MGMT] & 1))
861 return true;
862 return false;
863}
864
865static inline bool ata_id_has_zero_after_trim(const u16 *id)
866{
867 /* DSM supported, deterministic read, and read zero after trim set */
868 if (ata_id_has_trim(id) &&
869 (id[ATA_ID_ADDITIONAL_SUPP] & 0x4020) == 0x4020)
870 return true;
871
872 return false;
873}
874
875static inline bool ata_id_current_chs_valid(const u16 *id)
876{
877 /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command
878 has not been issued to the device then the values of
879 id[ATA_ID_CUR_CYLS] to id[ATA_ID_CUR_SECTORS] are vendor specific. */
880 return (id[ATA_ID_FIELD_VALID] & 1) && /* Current translation valid */
881 id[ATA_ID_CUR_CYLS] && /* cylinders in current translation */
882 id[ATA_ID_CUR_HEADS] && /* heads in current translation */
883 id[ATA_ID_CUR_HEADS] <= 16 &&
884 id[ATA_ID_CUR_SECTORS]; /* sectors in current translation */
885}
886
887static inline bool ata_id_is_cfa(const u16 *id)
888{
889 if ((id[ATA_ID_CONFIG] == 0x848A) || /* Traditional CF */
890 (id[ATA_ID_CONFIG] == 0x844A)) /* Delkin Devices CF */
891 return true;
892 /*
893 * CF specs don't require specific value in the word 0 anymore and yet
894 * they forbid to report the ATA version in the word 80 and require the
895 * CFA feature set support to be indicated in the word 83 in this case.
896 * Unfortunately, some cards only follow either of this requirements,
897 * and while those that don't indicate CFA feature support need some
898 * sort of quirk list, it seems impractical for the ones that do...
899 */
900 return (id[ATA_ID_COMMAND_SET_2] & 0xC004) == 0x4004;
901}
902
903static inline bool ata_id_is_ssd(const u16 *id)
904{
905 return id[ATA_ID_ROT_SPEED] == 0x01;
906}
907
908static inline bool ata_id_pio_need_iordy(const u16 *id, const u8 pio)
909{
910 /* CF spec. r4.1 Table 22 says no IORDY on PIO5 and PIO6. */
911 if (pio > 4 && ata_id_is_cfa(id))
912 return false;
913 /* For PIO3 and higher it is mandatory. */
914 if (pio > 2)
915 return true;
916 /* Turn it on when possible. */
917 return ata_id_has_iordy(id);
918}
919
920static inline bool ata_drive_40wire(const u16 *dev_id)
921{
922 if (ata_id_is_sata(dev_id))
923 return false; /* SATA */
924 if ((dev_id[ATA_ID_HW_CONFIG] & 0xE000) == 0x6000)
925 return false; /* 80 wire */
926 return true;
927}
928
929static inline bool ata_drive_40wire_relaxed(const u16 *dev_id)
930{
931 if ((dev_id[ATA_ID_HW_CONFIG] & 0x2000) == 0x2000)
932 return false; /* 80 wire */
933 return true;
934}
935
936static inline int atapi_cdb_len(const u16 *dev_id)
937{
938 u16 tmp = dev_id[ATA_ID_CONFIG] & 0x3;
939 switch (tmp) {
940 case 0: return 12;
941 case 1: return 16;
942 default: return -1;
943 }
944}
945
946static inline bool atapi_command_packet_set(const u16 *dev_id)
947{
948 return (dev_id[ATA_ID_CONFIG] >> 8) & 0x1f;
949}
950
951static inline bool atapi_id_dmadir(const u16 *dev_id)
952{
953 return ata_id_major_version(dev_id) >= 7 && (dev_id[62] & 0x8000);
954}
955
956/*
957 * ata_id_is_lba_capacity_ok() performs a sanity check on
958 * the claimed LBA capacity value for the device.
959 *
960 * Returns 1 if LBA capacity looks sensible, 0 otherwise.
961 *
962 * It is called only once for each device.
963 */
964static inline bool ata_id_is_lba_capacity_ok(u16 *id)
965{
966 unsigned long lba_sects, chs_sects, head, tail;
967
968 /* No non-LBA info .. so valid! */
969 if (id[ATA_ID_CYLS] == 0)
970 return true;
971
972 lba_sects = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
973
974 /*
975 * The ATA spec tells large drives to return
976 * C/H/S = 16383/16/63 independent of their size.
977 * Some drives can be jumpered to use 15 heads instead of 16.
978 * Some drives can be jumpered to use 4092 cyls instead of 16383.
979 */
980 if ((id[ATA_ID_CYLS] == 16383 ||
981 (id[ATA_ID_CYLS] == 4092 && id[ATA_ID_CUR_CYLS] == 16383)) &&
982 id[ATA_ID_SECTORS] == 63 &&
983 (id[ATA_ID_HEADS] == 15 || id[ATA_ID_HEADS] == 16) &&
984 (lba_sects >= 16383 * 63 * id[ATA_ID_HEADS]))
985 return true;
986
987 chs_sects = id[ATA_ID_CYLS] * id[ATA_ID_HEADS] * id[ATA_ID_SECTORS];
988
989 /* perform a rough sanity check on lba_sects: within 10% is OK */
990 if (lba_sects - chs_sects < chs_sects/10)
991 return true;
992
993 /* some drives have the word order reversed */
994 head = (lba_sects >> 16) & 0xffff;
995 tail = lba_sects & 0xffff;
996 lba_sects = head | (tail << 16);
997
998 if (lba_sects - chs_sects < chs_sects/10) {
999 *(__le32 *)&id[ATA_ID_LBA_CAPACITY] = __cpu_to_le32(lba_sects);
1000 return true; /* LBA capacity is (now) good */
1001 }
1002
1003 return false; /* LBA capacity value may be bad */
1004}
1005
1006static inline void ata_id_to_hd_driveid(u16 *id)
1007{
1008#ifdef __BIG_ENDIAN
1009 /* accessed in struct hd_driveid as 8-bit values */
1010 id[ATA_ID_MAX_MULTSECT] = __cpu_to_le16(id[ATA_ID_MAX_MULTSECT]);
1011 id[ATA_ID_CAPABILITY] = __cpu_to_le16(id[ATA_ID_CAPABILITY]);
1012 id[ATA_ID_OLD_PIO_MODES] = __cpu_to_le16(id[ATA_ID_OLD_PIO_MODES]);
1013 id[ATA_ID_OLD_DMA_MODES] = __cpu_to_le16(id[ATA_ID_OLD_DMA_MODES]);
1014 id[ATA_ID_MULTSECT] = __cpu_to_le16(id[ATA_ID_MULTSECT]);
1015
1016 /* as 32-bit values */
1017 *(u32 *)&id[ATA_ID_LBA_CAPACITY] = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
1018 *(u32 *)&id[ATA_ID_SPG] = ata_id_u32(id, ATA_ID_SPG);
1019
1020 /* as 64-bit value */
1021 *(u64 *)&id[ATA_ID_LBA_CAPACITY_2] =
1022 ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
1023#endif
1024}
1025
1026/*
1027 * Write LBA Range Entries to the buffer that will cover the extent from
1028 * sector to sector + count. This is used for TRIM and for ADD LBA(S)
1029 * TO NV CACHE PINNED SET.
1030 */
1031static inline unsigned ata_set_lba_range_entries(void *_buffer,
1032 unsigned buf_size, u64 sector, unsigned long count)
1033{
1034 __le64 *buffer = _buffer;
1035 unsigned i = 0, used_bytes;
1036
1037 while (i < buf_size / 8 ) { /* 6-byte LBA + 2-byte range per entry */
1038 u64 entry = sector |
1039 ((u64)(count > 0xffff ? 0xffff : count) << 48);
1040 buffer[i++] = __cpu_to_le64(entry);
1041 if (count <= 0xffff)
1042 break;
1043 count -= 0xffff;
1044 sector += 0xffff;
1045 }
1046
1047 used_bytes = ALIGN(i * 8, 512);
1048 memset(buffer + i, 0, used_bytes - i * 8);
1049 return used_bytes;
1050}
1051
1052static inline int is_multi_taskfile(struct ata_taskfile *tf)
1053{
1054 return (tf->command == ATA_CMD_READ_MULTI) ||
1055 (tf->command == ATA_CMD_WRITE_MULTI) ||
1056 (tf->command == ATA_CMD_READ_MULTI_EXT) ||
1057 (tf->command == ATA_CMD_WRITE_MULTI_EXT) ||
1058 (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
1059}
1060
1061static inline bool ata_ok(u8 status)
1062{
1063 return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))
1064 == ATA_DRDY);
1065}
1066
1067static inline bool lba_28_ok(u64 block, u32 n_block)
1068{
1069 /* check the ending block number: must be LESS THAN 0x0fffffff */
1070 return ((block + n_block) < ((1 << 28) - 1)) && (n_block <= 256);
1071}
1072
1073static inline bool lba_48_ok(u64 block, u32 n_block)
1074{
1075 /* check the ending block number */
1076 return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= 65536);
1077}
1078
1079#define sata_pmp_gscr_vendor(gscr) ((gscr)[SATA_PMP_GSCR_PROD_ID] & 0xffff)
1080#define sata_pmp_gscr_devid(gscr) ((gscr)[SATA_PMP_GSCR_PROD_ID] >> 16)
1081#define sata_pmp_gscr_rev(gscr) (((gscr)[SATA_PMP_GSCR_REV] >> 8) & 0xff)
1082#define sata_pmp_gscr_ports(gscr) ((gscr)[SATA_PMP_GSCR_PORT_INFO] & 0xf)
1083
1084#endif /* __LINUX_ATA_H__ */
Linux kernel - Deliverables
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