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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / include / linux / ata.h
blob32df2b6ef0e09e5ba918988adb8bc7d9e7f246f1
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 bool 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__ */