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_DOWNLOAD_MICRO_DMA = 0x93,
223	ATA_CMD_NOP		= 0x00,
224	ATA_CMD_FLUSH		= 0xE7,
225	ATA_CMD_FLUSH_EXT	= 0xEA,
226	ATA_CMD_ID_ATA		= 0xEC,
227	ATA_CMD_ID_ATAPI	= 0xA1,
228	ATA_CMD_SERVICE		= 0xA2,
229	ATA_CMD_READ		= 0xC8,
230	ATA_CMD_READ_EXT	= 0x25,
231	ATA_CMD_READ_QUEUED	= 0x26,
232	ATA_CMD_READ_STREAM_EXT	= 0x2B,
233	ATA_CMD_READ_STREAM_DMA_EXT = 0x2A,
234	ATA_CMD_WRITE		= 0xCA,
235	ATA_CMD_WRITE_EXT	= 0x35,
236	ATA_CMD_WRITE_QUEUED	= 0x36,
237	ATA_CMD_WRITE_STREAM_EXT = 0x3B,
238	ATA_CMD_WRITE_STREAM_DMA_EXT = 0x3A,
239	ATA_CMD_WRITE_FUA_EXT	= 0x3D,
240	ATA_CMD_WRITE_QUEUED_FUA_EXT = 0x3E,
241	ATA_CMD_FPDMA_READ	= 0x60,
242	ATA_CMD_FPDMA_WRITE	= 0x61,
243	ATA_CMD_FPDMA_SEND	= 0x64,
244	ATA_CMD_FPDMA_RECV	= 0x65,
245	ATA_CMD_PIO_READ	= 0x20,
246	ATA_CMD_PIO_READ_EXT	= 0x24,
247	ATA_CMD_PIO_WRITE	= 0x30,
248	ATA_CMD_PIO_WRITE_EXT	= 0x34,
249	ATA_CMD_READ_MULTI	= 0xC4,
250	ATA_CMD_READ_MULTI_EXT	= 0x29,
251	ATA_CMD_WRITE_MULTI	= 0xC5,
252	ATA_CMD_WRITE_MULTI_EXT	= 0x39,
253	ATA_CMD_WRITE_MULTI_FUA_EXT = 0xCE,
254	ATA_CMD_SET_FEATURES	= 0xEF,
255	ATA_CMD_SET_MULTI	= 0xC6,
256	ATA_CMD_PACKET		= 0xA0,
257	ATA_CMD_VERIFY		= 0x40,
258	ATA_CMD_VERIFY_EXT	= 0x42,
259	ATA_CMD_WRITE_UNCORR_EXT = 0x45,
260	ATA_CMD_STANDBYNOW1	= 0xE0,
261	ATA_CMD_IDLEIMMEDIATE	= 0xE1,
262	ATA_CMD_SLEEP		= 0xE6,
263	ATA_CMD_INIT_DEV_PARAMS	= 0x91,
264	ATA_CMD_READ_NATIVE_MAX	= 0xF8,
265	ATA_CMD_READ_NATIVE_MAX_EXT = 0x27,
266	ATA_CMD_SET_MAX		= 0xF9,
267	ATA_CMD_SET_MAX_EXT	= 0x37,
268	ATA_CMD_READ_LOG_EXT	= 0x2F,
269	ATA_CMD_WRITE_LOG_EXT	= 0x3F,
270	ATA_CMD_READ_LOG_DMA_EXT = 0x47,
271	ATA_CMD_WRITE_LOG_DMA_EXT = 0x57,
272	ATA_CMD_TRUSTED_NONDATA	= 0x5B,
273	ATA_CMD_TRUSTED_RCV	= 0x5C,
274	ATA_CMD_TRUSTED_RCV_DMA = 0x5D,
275	ATA_CMD_TRUSTED_SND	= 0x5E,
276	ATA_CMD_TRUSTED_SND_DMA = 0x5F,
277	ATA_CMD_PMP_READ	= 0xE4,
278	ATA_CMD_PMP_READ_DMA	= 0xE9,
279	ATA_CMD_PMP_WRITE	= 0xE8,
280	ATA_CMD_PMP_WRITE_DMA	= 0xEB,
281	ATA_CMD_CONF_OVERLAY	= 0xB1,
282	ATA_CMD_SEC_SET_PASS	= 0xF1,
283	ATA_CMD_SEC_UNLOCK	= 0xF2,
284	ATA_CMD_SEC_ERASE_PREP	= 0xF3,
285	ATA_CMD_SEC_ERASE_UNIT	= 0xF4,
286	ATA_CMD_SEC_FREEZE_LOCK	= 0xF5,
287	ATA_CMD_SEC_DISABLE_PASS = 0xF6,
288	ATA_CMD_CONFIG_STREAM	= 0x51,
289	ATA_CMD_SMART		= 0xB0,
290	ATA_CMD_MEDIA_LOCK	= 0xDE,
291	ATA_CMD_MEDIA_UNLOCK	= 0xDF,
292	ATA_CMD_DSM		= 0x06,
293	ATA_CMD_CHK_MED_CRD_TYP = 0xD1,
294	ATA_CMD_CFA_REQ_EXT_ERR = 0x03,
295	ATA_CMD_CFA_WRITE_NE	= 0x38,
296	ATA_CMD_CFA_TRANS_SECT	= 0x87,
297	ATA_CMD_CFA_ERASE	= 0xC0,
298	ATA_CMD_CFA_WRITE_MULT_NE = 0xCD,
299	ATA_CMD_REQ_SENSE_DATA  = 0x0B,
300	ATA_CMD_SANITIZE_DEVICE = 0xB4,
301
302	/* marked obsolete in the ATA/ATAPI-7 spec */
303	ATA_CMD_RESTORE		= 0x10,
304
305	/* Subcmds for ATA_CMD_FPDMA_SEND */
306	ATA_SUBCMD_FPDMA_SEND_DSM            = 0x00,
307	ATA_SUBCMD_FPDMA_SEND_WR_LOG_DMA_EXT = 0x02,
308
309	/* READ_LOG_EXT pages */
310	ATA_LOG_SATA_NCQ	= 0x10,
311	ATA_LOG_NCQ_SEND_RECV	  = 0x13,
312	ATA_LOG_SATA_ID_DEV_DATA  = 0x30,
313	ATA_LOG_SATA_SETTINGS	  = 0x08,
314	ATA_LOG_DEVSLP_OFFSET	  = 0x30,
315	ATA_LOG_DEVSLP_SIZE	  = 0x08,
316	ATA_LOG_DEVSLP_MDAT	  = 0x00,
317	ATA_LOG_DEVSLP_MDAT_MASK  = 0x1F,
318	ATA_LOG_DEVSLP_DETO	  = 0x01,
319	ATA_LOG_DEVSLP_VALID	  = 0x07,
320	ATA_LOG_DEVSLP_VALID_MASK = 0x80,
321
322	/* NCQ send and receive log */
323	ATA_LOG_NCQ_SEND_RECV_SUBCMDS_OFFSET	= 0x00,
324	ATA_LOG_NCQ_SEND_RECV_SUBCMDS_DSM	= (1 << 0),
325	ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET	= 0x04,
326	ATA_LOG_NCQ_SEND_RECV_DSM_TRIM		= (1 << 0),
327	ATA_LOG_NCQ_SEND_RECV_RD_LOG_OFFSET	= 0x08,
328	ATA_LOG_NCQ_SEND_RECV_WR_LOG_OFFSET	= 0x0C,
329	ATA_LOG_NCQ_SEND_RECV_SIZE		= 0x10,
330
331	/* READ/WRITE LONG (obsolete) */
332	ATA_CMD_READ_LONG	= 0x22,
333	ATA_CMD_READ_LONG_ONCE	= 0x23,
334	ATA_CMD_WRITE_LONG	= 0x32,
335	ATA_CMD_WRITE_LONG_ONCE	= 0x33,
336
337	/* SETFEATURES stuff */
338	SETFEATURES_XFER	= 0x03,
339	XFER_UDMA_7		= 0x47,
340	XFER_UDMA_6		= 0x46,
341	XFER_UDMA_5		= 0x45,
342	XFER_UDMA_4		= 0x44,
343	XFER_UDMA_3		= 0x43,
344	XFER_UDMA_2		= 0x42,
345	XFER_UDMA_1		= 0x41,
346	XFER_UDMA_0		= 0x40,
347	XFER_MW_DMA_4		= 0x24,	/* CFA only */
348	XFER_MW_DMA_3		= 0x23,	/* CFA only */
349	XFER_MW_DMA_2		= 0x22,
350	XFER_MW_DMA_1		= 0x21,
351	XFER_MW_DMA_0		= 0x20,
352	XFER_SW_DMA_2		= 0x12,
353	XFER_SW_DMA_1		= 0x11,
354	XFER_SW_DMA_0		= 0x10,
355	XFER_PIO_6		= 0x0E,	/* CFA only */
356	XFER_PIO_5		= 0x0D,	/* CFA only */
357	XFER_PIO_4		= 0x0C,
358	XFER_PIO_3		= 0x0B,
359	XFER_PIO_2		= 0x0A,
360	XFER_PIO_1		= 0x09,
361	XFER_PIO_0		= 0x08,
362	XFER_PIO_SLOW		= 0x00,
363
364	SETFEATURES_WC_ON	= 0x02, /* Enable write cache */
365	SETFEATURES_WC_OFF	= 0x82, /* Disable write cache */
366
367	/* Enable/Disable Automatic Acoustic Management */
368	SETFEATURES_AAM_ON	= 0x42,
369	SETFEATURES_AAM_OFF	= 0xC2,
370
371	SETFEATURES_SPINUP	= 0x07, /* Spin-up drive */
372
373	SETFEATURES_SATA_ENABLE = 0x10, /* Enable use of SATA feature */
374	SETFEATURES_SATA_DISABLE = 0x90, /* Disable use of SATA feature */
375
376	/* SETFEATURE Sector counts for SATA features */
377	SATA_FPDMA_OFFSET	= 0x01,	/* FPDMA non-zero buffer offsets */
378	SATA_FPDMA_AA		= 0x02, /* FPDMA Setup FIS Auto-Activate */
379	SATA_DIPM		= 0x03,	/* Device Initiated Power Management */
380	SATA_FPDMA_IN_ORDER	= 0x04,	/* FPDMA in-order data delivery */
381	SATA_AN			= 0x05,	/* Asynchronous Notification */
382	SATA_SSP		= 0x06,	/* Software Settings Preservation */
383	SATA_DEVSLP		= 0x09,	/* Device Sleep */
384
385	/* feature values for SET_MAX */
386	ATA_SET_MAX_ADDR	= 0x00,
387	ATA_SET_MAX_PASSWD	= 0x01,
388	ATA_SET_MAX_LOCK	= 0x02,
389	ATA_SET_MAX_UNLOCK	= 0x03,
390	ATA_SET_MAX_FREEZE_LOCK	= 0x04,
391
392	/* feature values for DEVICE CONFIGURATION OVERLAY */
393	ATA_DCO_RESTORE		= 0xC0,
394	ATA_DCO_FREEZE_LOCK	= 0xC1,
395	ATA_DCO_IDENTIFY	= 0xC2,
396	ATA_DCO_SET		= 0xC3,
397
398	/* feature values for SMART */
399	ATA_SMART_ENABLE	= 0xD8,
400	ATA_SMART_READ_VALUES	= 0xD0,
401	ATA_SMART_READ_THRESHOLDS = 0xD1,
402
403	/* feature values for Data Set Management */
404	ATA_DSM_TRIM		= 0x01,
405
406	/* password used in LBA Mid / LBA High for executing SMART commands */
407	ATA_SMART_LBAM_PASS	= 0x4F,
408	ATA_SMART_LBAH_PASS	= 0xC2,
409
410	/* ATAPI stuff */
411	ATAPI_PKT_DMA		= (1 << 0),
412	ATAPI_DMADIR		= (1 << 2),	/* ATAPI data dir:
413						   0=to device, 1=to host */
414	ATAPI_CDB_LEN		= 16,
415
416	/* PMP stuff */
417	SATA_PMP_MAX_PORTS	= 15,
418	SATA_PMP_CTRL_PORT	= 15,
419
420	SATA_PMP_GSCR_DWORDS	= 128,
421	SATA_PMP_GSCR_PROD_ID	= 0,
422	SATA_PMP_GSCR_REV	= 1,
423	SATA_PMP_GSCR_PORT_INFO	= 2,
424	SATA_PMP_GSCR_ERROR	= 32,
425	SATA_PMP_GSCR_ERROR_EN	= 33,
426	SATA_PMP_GSCR_FEAT	= 64,
427	SATA_PMP_GSCR_FEAT_EN	= 96,
428
429	SATA_PMP_PSCR_STATUS	= 0,
430	SATA_PMP_PSCR_ERROR	= 1,
431	SATA_PMP_PSCR_CONTROL	= 2,
432
433	SATA_PMP_FEAT_BIST	= (1 << 0),
434	SATA_PMP_FEAT_PMREQ	= (1 << 1),
435	SATA_PMP_FEAT_DYNSSC	= (1 << 2),
436	SATA_PMP_FEAT_NOTIFY	= (1 << 3),
437
438	/* cable types */
439	ATA_CBL_NONE		= 0,
440	ATA_CBL_PATA40		= 1,
441	ATA_CBL_PATA80		= 2,
442	ATA_CBL_PATA40_SHORT	= 3,	/* 40 wire cable to high UDMA spec */
443	ATA_CBL_PATA_UNK	= 4,	/* don't know, maybe 80c? */
444	ATA_CBL_PATA_IGN	= 5,	/* don't know, ignore cable handling */
445	ATA_CBL_SATA		= 6,
446
447	/* SATA Status and Control Registers */
448	SCR_STATUS		= 0,
449	SCR_ERROR		= 1,
450	SCR_CONTROL		= 2,
451	SCR_ACTIVE		= 3,
452	SCR_NOTIFICATION	= 4,
453
454	/* SError bits */
455	SERR_DATA_RECOVERED	= (1 << 0), /* recovered data error */
456	SERR_COMM_RECOVERED	= (1 << 1), /* recovered comm failure */
457	SERR_DATA		= (1 << 8), /* unrecovered data error */
458	SERR_PERSISTENT		= (1 << 9), /* persistent data/comm error */
459	SERR_PROTOCOL		= (1 << 10), /* protocol violation */
460	SERR_INTERNAL		= (1 << 11), /* host internal error */
461	SERR_PHYRDY_CHG		= (1 << 16), /* PHY RDY changed */
462	SERR_PHY_INT_ERR	= (1 << 17), /* PHY internal error */
463	SERR_COMM_WAKE		= (1 << 18), /* Comm wake */
464	SERR_10B_8B_ERR		= (1 << 19), /* 10b to 8b decode error */
465	SERR_DISPARITY		= (1 << 20), /* Disparity */
466	SERR_CRC		= (1 << 21), /* CRC error */
467	SERR_HANDSHAKE		= (1 << 22), /* Handshake error */
468	SERR_LINK_SEQ_ERR	= (1 << 23), /* Link sequence error */
469	SERR_TRANS_ST_ERROR	= (1 << 24), /* Transport state trans. error */
470	SERR_UNRECOG_FIS	= (1 << 25), /* Unrecognized FIS */
471	SERR_DEV_XCHG		= (1 << 26), /* device exchanged */
472};
473
474enum ata_tf_protocols {
475	/* ATA taskfile protocols */
476	ATA_PROT_UNKNOWN,	/* unknown/invalid */
477	ATA_PROT_NODATA,	/* no data */
478	ATA_PROT_PIO,		/* PIO data xfer */
479	ATA_PROT_DMA,		/* DMA */
480	ATA_PROT_NCQ,		/* NCQ */
481	ATAPI_PROT_NODATA,	/* packet command, no data */
482	ATAPI_PROT_PIO,		/* packet command, PIO data xfer*/
483	ATAPI_PROT_DMA,		/* packet command with special DMA sauce */
484};
485
486enum ata_ioctls {
487	ATA_IOC_GET_IO32	= 0x309,
488	ATA_IOC_SET_IO32	= 0x324,
489};
490
491/* core structures */
492
493struct ata_bmdma_prd {
494	__le32			addr;
495	__le32			flags_len;
496};
497
498/*
499 * id tests
500 */
501#define ata_id_is_ata(id)	(((id)[ATA_ID_CONFIG] & (1 << 15)) == 0)
502#define ata_id_has_lba(id)	((id)[ATA_ID_CAPABILITY] & (1 << 9))
503#define ata_id_has_dma(id)	((id)[ATA_ID_CAPABILITY] & (1 << 8))
504#define ata_id_has_ncq(id)	((id)[ATA_ID_SATA_CAPABILITY] & (1 << 8))
505#define ata_id_queue_depth(id)	(((id)[ATA_ID_QUEUE_DEPTH] & 0x1f) + 1)
506#define ata_id_removeable(id)	((id)[ATA_ID_CONFIG] & (1 << 7))
507#define ata_id_has_atapi_AN(id)	\
508	((((id)[ATA_ID_SATA_CAPABILITY] != 0x0000) && \
509	  ((id)[ATA_ID_SATA_CAPABILITY] != 0xffff)) && \
510	 ((id)[ATA_ID_FEATURE_SUPP] & (1 << 5)))
511#define ata_id_has_fpdma_aa(id)	\
512	((((id)[ATA_ID_SATA_CAPABILITY] != 0x0000) && \
513	  ((id)[ATA_ID_SATA_CAPABILITY] != 0xffff)) && \
514	 ((id)[ATA_ID_FEATURE_SUPP] & (1 << 2)))
515#define ata_id_iordy_disable(id) ((id)[ATA_ID_CAPABILITY] & (1 << 10))
516#define ata_id_has_iordy(id) ((id)[ATA_ID_CAPABILITY] & (1 << 11))
517#define ata_id_u32(id,n)	\
518	(((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
519#define ata_id_u64(id,n)	\
520	( ((u64) (id)[(n) + 3] << 48) |	\
521	  ((u64) (id)[(n) + 2] << 32) |	\
522	  ((u64) (id)[(n) + 1] << 16) |	\
523	  ((u64) (id)[(n) + 0]) )
524
525#define ata_id_cdb_intr(id)	(((id)[ATA_ID_CONFIG] & 0x60) == 0x20)
526#define ata_id_has_da(id)	((id)[ATA_ID_SATA_CAPABILITY_2] & (1 << 4))
527#define ata_id_has_devslp(id)	((id)[ATA_ID_FEATURE_SUPP] & (1 << 8))
528
529static inline bool ata_id_has_hipm(const u16 *id)
530{
531	u16 val = id[ATA_ID_SATA_CAPABILITY];
532
533	if (val == 0 || val == 0xffff)
534		return false;
535
536	return val & (1 << 9);
537}
538
539static inline bool ata_id_has_dipm(const u16 *id)
540{
541	u16 val = id[ATA_ID_FEATURE_SUPP];
542
543	if (val == 0 || val == 0xffff)
544		return false;
545
546	return val & (1 << 3);
547}
548
549
550static inline bool ata_id_has_fua(const u16 *id)
551{
552	if ((id[ATA_ID_CFSSE] & 0xC000) != 0x4000)
553		return false;
554	return id[ATA_ID_CFSSE] & (1 << 6);
555}
556
557static inline bool ata_id_has_flush(const u16 *id)
558{
559	if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
560		return false;
561	return id[ATA_ID_COMMAND_SET_2] & (1 << 12);
562}
563
564static inline bool ata_id_flush_enabled(const u16 *id)
565{
566	if (ata_id_has_flush(id) == 0)
567		return false;
568	if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
569		return false;
570	return id[ATA_ID_CFS_ENABLE_2] & (1 << 12);
571}
572
573static inline bool ata_id_has_flush_ext(const u16 *id)
574{
575	if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
576		return false;
577	return id[ATA_ID_COMMAND_SET_2] & (1 << 13);
578}
579
580static inline bool ata_id_flush_ext_enabled(const u16 *id)
581{
582	if (ata_id_has_flush_ext(id) == 0)
583		return false;
584	if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
585		return false;
586	/*
587	 * some Maxtor disks have bit 13 defined incorrectly
588	 * so check bit 10 too
589	 */
590	return (id[ATA_ID_CFS_ENABLE_2] & 0x2400) == 0x2400;
591}
592
593static inline u32 ata_id_logical_sector_size(const u16 *id)
594{
595	/* T13/1699-D Revision 6a, Sep 6, 2008. Page 128.
596	 * IDENTIFY DEVICE data, word 117-118.
597	 * 0xd000 ignores bit 13 (logical:physical > 1)
598	 */
599	if ((id[ATA_ID_SECTOR_SIZE] & 0xd000) == 0x5000)
600		return (((id[ATA_ID_LOGICAL_SECTOR_SIZE+1] << 16)
601			 + id[ATA_ID_LOGICAL_SECTOR_SIZE]) * sizeof(u16)) ;
602	return ATA_SECT_SIZE;
603}
604
605static inline u8 ata_id_log2_per_physical_sector(const u16 *id)
606{
607	/* T13/1699-D Revision 6a, Sep 6, 2008. Page 128.
608	 * IDENTIFY DEVICE data, word 106.
609	 * 0xe000 ignores bit 12 (logical sector > 512 bytes)
610	 */
611	if ((id[ATA_ID_SECTOR_SIZE] & 0xe000) == 0x6000)
612		return (id[ATA_ID_SECTOR_SIZE] & 0xf);
613	return 0;
614}
615
616/* Offset of logical sectors relative to physical sectors.
617 *
618 * If device has more than one logical sector per physical sector
619 * (aka 512 byte emulation), vendors might offset the "sector 0" address
620 * so sector 63 is "naturally aligned" - e.g. FAT partition table.
621 * This avoids Read/Mod/Write penalties when using FAT partition table
622 * and updating "well aligned" (FS perspective) physical sectors on every
623 * transaction.
624 */
625static inline u16 ata_id_logical_sector_offset(const u16 *id,
626	 u8 log2_per_phys)
627{
628	u16 word_209 = id[209];
629
630	if ((log2_per_phys > 1) && (word_209 & 0xc000) == 0x4000) {
631		u16 first = word_209 & 0x3fff;
632		if (first > 0)
633			return (1 << log2_per_phys) - first;
634	}
635	return 0;
636}
637
638static inline bool ata_id_has_lba48(const u16 *id)
639{
640	if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
641		return false;
642	if (!ata_id_u64(id, ATA_ID_LBA_CAPACITY_2))
643		return false;
644	return id[ATA_ID_COMMAND_SET_2] & (1 << 10);
645}
646
647static inline bool ata_id_lba48_enabled(const u16 *id)
648{
649	if (ata_id_has_lba48(id) == 0)
650		return false;
651	if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
652		return false;
653	return id[ATA_ID_CFS_ENABLE_2] & (1 << 10);
654}
655
656static inline bool ata_id_hpa_enabled(const u16 *id)
657{
658	/* Yes children, word 83 valid bits cover word 82 data */
659	if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
660		return false;
661	/* And 87 covers 85-87 */
662	if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
663		return false;
664	/* Check command sets enabled as well as supported */
665	if ((id[ATA_ID_CFS_ENABLE_1] & (1 << 10)) == 0)
666		return false;
667	return id[ATA_ID_COMMAND_SET_1] & (1 << 10);
668}
669
670static inline bool ata_id_has_wcache(const u16 *id)
671{
672	/* Yes children, word 83 valid bits cover word 82 data */
673	if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
674		return false;
675	return id[ATA_ID_COMMAND_SET_1] & (1 << 5);
676}
677
678static inline bool ata_id_has_pm(const u16 *id)
679{
680	if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
681		return false;
682	return id[ATA_ID_COMMAND_SET_1] & (1 << 3);
683}
684
685static inline bool ata_id_rahead_enabled(const u16 *id)
686{
687	if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
688		return false;
689	return id[ATA_ID_CFS_ENABLE_1] & (1 << 6);
690}
691
692static inline bool ata_id_wcache_enabled(const u16 *id)
693{
694	if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
695		return false;
696	return id[ATA_ID_CFS_ENABLE_1] & (1 << 5);
697}
698
699/**
700 *	ata_id_major_version	-	get ATA level of drive
701 *	@id: Identify data
702 *
703 *	Caveats:
704 *		ATA-1 considers identify optional
705 *		ATA-2 introduces mandatory identify
706 *		ATA-3 introduces word 80 and accurate reporting
707 *
708 *	The practical impact of this is that ata_id_major_version cannot
709 *	reliably report on drives below ATA3.
710 */
711
712static inline unsigned int ata_id_major_version(const u16 *id)
713{
714	unsigned int mver;
715
716	if (id[ATA_ID_MAJOR_VER] == 0xFFFF)
717		return 0;
718
719	for (mver = 14; mver >= 1; mver--)
720		if (id[ATA_ID_MAJOR_VER] & (1 << mver))
721			break;
722	return mver;
723}
724
725static inline bool ata_id_is_sata(const u16 *id)
726{
727	/*
728	 * See if word 93 is 0 AND drive is at least ATA-5 compatible
729	 * verifying that word 80 by casting it to a signed type --
730	 * this trick allows us to filter out the reserved values of
731	 * 0x0000 and 0xffff along with the earlier ATA revisions...
732	 */
733	if (id[ATA_ID_HW_CONFIG] == 0 && (short)id[ATA_ID_MAJOR_VER] >= 0x0020)
734		return true;
735	return false;
736}
737
738static inline bool ata_id_has_tpm(const u16 *id)
739{
740	/* The TPM bits are only valid on ATA8 */
741	if (ata_id_major_version(id) < 8)
742		return false;
743	if ((id[48] & 0xC000) != 0x4000)
744		return false;
745	return id[48] & (1 << 0);
746}
747
748static inline bool ata_id_has_dword_io(const u16 *id)
749{
750	/* ATA 8 reuses this flag for "trusted" computing */
751	if (ata_id_major_version(id) > 7)
752		return false;
753	return id[ATA_ID_DWORD_IO] & (1 << 0);
754}
755
756static inline bool ata_id_has_unload(const u16 *id)
757{
758	if (ata_id_major_version(id) >= 7 &&
759	    (id[ATA_ID_CFSSE] & 0xC000) == 0x4000 &&
760	    id[ATA_ID_CFSSE] & (1 << 13))
761		return true;
762	return false;
763}
764
765static inline bool ata_id_has_wwn(const u16 *id)
766{
767	return (id[ATA_ID_CSF_DEFAULT] & 0xC100) == 0x4100;
768}
769
770static inline int ata_id_form_factor(const u16 *id)
771{
772	u16 val = id[168];
773
774	if (ata_id_major_version(id) < 7 || val == 0 || val == 0xffff)
775		return 0;
776
777	val &= 0xf;
778
779	if (val > 5)
780		return 0;
781
782	return val;
783}
784
785static inline int ata_id_rotation_rate(const u16 *id)
786{
787	u16 val = id[217];
788
789	if (ata_id_major_version(id) < 7 || val == 0 || val == 0xffff)
790		return 0;
791
792	if (val > 1 && val < 0x401)
793		return 0;
794
795	return val;
796}
797
798static inline bool ata_id_has_ncq_send_and_recv(const u16 *id)
799{
800	return id[ATA_ID_SATA_CAPABILITY_2] & BIT(6);
801}
802
803static inline bool ata_id_has_trim(const u16 *id)
804{
805	if (ata_id_major_version(id) >= 7 &&
806	    (id[ATA_ID_DATA_SET_MGMT] & 1))
807		return true;
808	return false;
809}
810
811static inline bool ata_id_has_zero_after_trim(const u16 *id)
812{
813	/* DSM supported, deterministic read, and read zero after trim set */
814	if (ata_id_has_trim(id) &&
815	    (id[ATA_ID_ADDITIONAL_SUPP] & 0x4020) == 0x4020)
816		return true;
817
818	return false;
819}
820
821static inline bool ata_id_current_chs_valid(const u16 *id)
822{
823	/* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command
824	   has not been issued to the device then the values of
825	   id[ATA_ID_CUR_CYLS] to id[ATA_ID_CUR_SECTORS] are vendor specific. */
826	return (id[ATA_ID_FIELD_VALID] & 1) && /* Current translation valid */
827		id[ATA_ID_CUR_CYLS] &&  /* cylinders in current translation */
828		id[ATA_ID_CUR_HEADS] &&  /* heads in current translation */
829		id[ATA_ID_CUR_HEADS] <= 16 &&
830		id[ATA_ID_CUR_SECTORS];    /* sectors in current translation */
831}
832
833static inline bool ata_id_is_cfa(const u16 *id)
834{
835	if ((id[ATA_ID_CONFIG] == 0x848A) ||	/* Traditional CF */
836	    (id[ATA_ID_CONFIG] == 0x844A))	/* Delkin Devices CF */
837		return true;
838	/*
839	 * CF specs don't require specific value in the word 0 anymore and yet
840	 * they forbid to report the ATA version in the word 80 and require the
841	 * CFA feature set support to be indicated in the word 83 in this case.
842	 * Unfortunately, some cards only follow either of this requirements,
843	 * and while those that don't indicate CFA feature support need some
844	 * sort of quirk list, it seems impractical for the ones that do...
845	 */
846	return (id[ATA_ID_COMMAND_SET_2] & 0xC004) == 0x4004;
847}
848
849static inline bool ata_id_is_ssd(const u16 *id)
850{
851	return id[ATA_ID_ROT_SPEED] == 0x01;
852}
853
854static inline bool ata_id_pio_need_iordy(const u16 *id, const u8 pio)
855{
856	/* CF spec. r4.1 Table 22 says no IORDY on PIO5 and PIO6. */
857	if (pio > 4 && ata_id_is_cfa(id))
858		return false;
859	/* For PIO3 and higher it is mandatory. */
860	if (pio > 2)
861		return true;
862	/* Turn it on when possible. */
863	return ata_id_has_iordy(id);
864}
865
866static inline bool ata_drive_40wire(const u16 *dev_id)
867{
868	if (ata_id_is_sata(dev_id))
869		return false;	/* SATA */
870	if ((dev_id[ATA_ID_HW_CONFIG] & 0xE000) == 0x6000)
871		return false;	/* 80 wire */
872	return true;
873}
874
875static inline bool ata_drive_40wire_relaxed(const u16 *dev_id)
876{
877	if ((dev_id[ATA_ID_HW_CONFIG] & 0x2000) == 0x2000)
878		return false;	/* 80 wire */
879	return true;
880}
881
882static inline int atapi_cdb_len(const u16 *dev_id)
883{
884	u16 tmp = dev_id[ATA_ID_CONFIG] & 0x3;
885	switch (tmp) {
886	case 0:		return 12;
887	case 1:		return 16;
888	default:	return -1;
889	}
890}
891
892static inline int atapi_command_packet_set(const u16 *dev_id)
893{
894	return (dev_id[ATA_ID_CONFIG] >> 8) & 0x1f;
895}
896
897static inline bool atapi_id_dmadir(const u16 *dev_id)
898{
899	return ata_id_major_version(dev_id) >= 7 && (dev_id[62] & 0x8000);
900}
901
902/*
903 * ata_id_is_lba_capacity_ok() performs a sanity check on
904 * the claimed LBA capacity value for the device.
905 *
906 * Returns 1 if LBA capacity looks sensible, 0 otherwise.
907 *
908 * It is called only once for each device.
909 */
910static inline bool ata_id_is_lba_capacity_ok(u16 *id)
911{
912	unsigned long lba_sects, chs_sects, head, tail;
913
914	/* No non-LBA info .. so valid! */
915	if (id[ATA_ID_CYLS] == 0)
916		return true;
917
918	lba_sects = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
919
920	/*
921	 * The ATA spec tells large drives to return
922	 * C/H/S = 16383/16/63 independent of their size.
923	 * Some drives can be jumpered to use 15 heads instead of 16.
924	 * Some drives can be jumpered to use 4092 cyls instead of 16383.
925	 */
926	if ((id[ATA_ID_CYLS] == 16383 ||
927	     (id[ATA_ID_CYLS] == 4092 && id[ATA_ID_CUR_CYLS] == 16383)) &&
928	    id[ATA_ID_SECTORS] == 63 &&
929	    (id[ATA_ID_HEADS] == 15 || id[ATA_ID_HEADS] == 16) &&
930	    (lba_sects >= 16383 * 63 * id[ATA_ID_HEADS]))
931		return true;
932
933	chs_sects = id[ATA_ID_CYLS] * id[ATA_ID_HEADS] * id[ATA_ID_SECTORS];
934
935	/* perform a rough sanity check on lba_sects: within 10% is OK */
936	if (lba_sects - chs_sects < chs_sects/10)
937		return true;
938
939	/* some drives have the word order reversed */
940	head = (lba_sects >> 16) & 0xffff;
941	tail = lba_sects & 0xffff;
942	lba_sects = head | (tail << 16);
943
944	if (lba_sects - chs_sects < chs_sects/10) {
945		*(__le32 *)&id[ATA_ID_LBA_CAPACITY] = __cpu_to_le32(lba_sects);
946		return true;	/* LBA capacity is (now) good */
947	}
948
949	return false;	/* LBA capacity value may be bad */
950}
951
952static inline void ata_id_to_hd_driveid(u16 *id)
953{
954#ifdef __BIG_ENDIAN
955	/* accessed in struct hd_driveid as 8-bit values */
956	id[ATA_ID_MAX_MULTSECT]	 = __cpu_to_le16(id[ATA_ID_MAX_MULTSECT]);
957	id[ATA_ID_CAPABILITY]	 = __cpu_to_le16(id[ATA_ID_CAPABILITY]);
958	id[ATA_ID_OLD_PIO_MODES] = __cpu_to_le16(id[ATA_ID_OLD_PIO_MODES]);
959	id[ATA_ID_OLD_DMA_MODES] = __cpu_to_le16(id[ATA_ID_OLD_DMA_MODES]);
960	id[ATA_ID_MULTSECT]	 = __cpu_to_le16(id[ATA_ID_MULTSECT]);
961
962	/* as 32-bit values */
963	*(u32 *)&id[ATA_ID_LBA_CAPACITY] = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
964	*(u32 *)&id[ATA_ID_SPG]		 = ata_id_u32(id, ATA_ID_SPG);
965
966	/* as 64-bit value */
967	*(u64 *)&id[ATA_ID_LBA_CAPACITY_2] =
968		ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
969#endif
970}
971
972/*
973 * Write LBA Range Entries to the buffer that will cover the extent from
974 * sector to sector + count.  This is used for TRIM and for ADD LBA(S)
975 * TO NV CACHE PINNED SET.
976 */
977static inline unsigned ata_set_lba_range_entries(void *_buffer,
978		unsigned buf_size, u64 sector, unsigned long count)
979{
980	__le64 *buffer = _buffer;
981	unsigned i = 0, used_bytes;
982
983	while (i < buf_size / 8 ) { /* 6-byte LBA + 2-byte range per entry */
984		u64 entry = sector |
985			((u64)(count > 0xffff ? 0xffff : count) << 48);
986		buffer[i++] = __cpu_to_le64(entry);
987		if (count <= 0xffff)
988			break;
989		count -= 0xffff;
990		sector += 0xffff;
991	}
992
993	used_bytes = ALIGN(i * 8, 512);
994	memset(buffer + i, 0, used_bytes - i * 8);
995	return used_bytes;
996}
997
998static inline bool ata_ok(u8 status)
999{
1000	return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))
1001			== ATA_DRDY);
1002}
1003
1004static inline bool lba_28_ok(u64 block, u32 n_block)
1005{
1006	/* check the ending block number: must be LESS THAN 0x0fffffff */
1007	return ((block + n_block) < ((1 << 28) - 1)) && (n_block <= 256);
1008}
1009
1010static inline bool lba_48_ok(u64 block, u32 n_block)
1011{
1012	/* check the ending block number */
1013	return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= 65536);
1014}
1015
1016#define sata_pmp_gscr_vendor(gscr)	((gscr)[SATA_PMP_GSCR_PROD_ID] & 0xffff)
1017#define sata_pmp_gscr_devid(gscr)	((gscr)[SATA_PMP_GSCR_PROD_ID] >> 16)
1018#define sata_pmp_gscr_rev(gscr)		(((gscr)[SATA_PMP_GSCR_REV] >> 8) & 0xff)
1019#define sata_pmp_gscr_ports(gscr)	((gscr)[SATA_PMP_GSCR_PORT_INFO] & 0xf)
1020
1021#endif /* __LINUX_ATA_H__ */
1022