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