Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
af36d7f0 JG |
2 | * Copyright 2003-2005 Red Hat, Inc. All rights reserved. |
3 | * Copyright 2003-2005 Jeff Garzik | |
4 | * | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2, or (at your option) | |
9 | * any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; see the file COPYING. If not, write to | |
18 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | * | |
20 | * | |
21 | * libata documentation is available via 'make {ps|pdf}docs', | |
22 | * as Documentation/DocBook/libata.* | |
23 | * | |
1da177e4 LT |
24 | */ |
25 | ||
26 | #ifndef __LINUX_LIBATA_H__ | |
27 | #define __LINUX_LIBATA_H__ | |
28 | ||
29 | #include <linux/delay.h> | |
30 | #include <linux/interrupt.h> | |
31 | #include <linux/pci.h> | |
1c72d8d9 | 32 | #include <linux/dma-mapping.h> |
41542dbe | 33 | #include <asm/scatterlist.h> |
f0d36efd | 34 | #include <linux/io.h> |
1da177e4 LT |
35 | #include <linux/ata.h> |
36 | #include <linux/workqueue.h> | |
35bb94b1 | 37 | #include <scsi/scsi_host.h> |
11ef697b | 38 | #include <linux/acpi.h> |
1da177e4 | 39 | |
a6d967a4 JG |
40 | /* |
41 | * Define if arch has non-standard setup. This is a _PCI_ standard | |
42 | * not a legacy or ISA standard. | |
43 | */ | |
44 | #ifdef CONFIG_ATA_NONSTANDARD | |
2ec7df04 | 45 | #include <asm/libata-portmap.h> |
a6d967a4 JG |
46 | #else |
47 | #include <asm-generic/libata-portmap.h> | |
48 | #endif | |
2ec7df04 | 49 | |
1da177e4 | 50 | /* |
bfd60579 RD |
51 | * compile-time options: to be removed as soon as all the drivers are |
52 | * converted to the new debugging mechanism | |
1da177e4 LT |
53 | */ |
54 | #undef ATA_DEBUG /* debugging output */ | |
55 | #undef ATA_VERBOSE_DEBUG /* yet more debugging output */ | |
56 | #undef ATA_IRQ_TRAP /* define to ack screaming irqs */ | |
57 | #undef ATA_NDEBUG /* define to disable quick runtime checks */ | |
1da177e4 LT |
58 | |
59 | ||
60 | /* note: prints function name for you */ | |
61 | #ifdef ATA_DEBUG | |
62 | #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) | |
63 | #ifdef ATA_VERBOSE_DEBUG | |
64 | #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) | |
65 | #else | |
66 | #define VPRINTK(fmt, args...) | |
67 | #endif /* ATA_VERBOSE_DEBUG */ | |
68 | #else | |
69 | #define DPRINTK(fmt, args...) | |
70 | #define VPRINTK(fmt, args...) | |
71 | #endif /* ATA_DEBUG */ | |
72 | ||
2c13b7ce JG |
73 | #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) |
74 | ||
bfd60579 RD |
75 | /* NEW: debug levels */ |
76 | #define HAVE_LIBATA_MSG 1 | |
77 | ||
78 | enum { | |
79 | ATA_MSG_DRV = 0x0001, | |
80 | ATA_MSG_INFO = 0x0002, | |
81 | ATA_MSG_PROBE = 0x0004, | |
82 | ATA_MSG_WARN = 0x0008, | |
83 | ATA_MSG_MALLOC = 0x0010, | |
84 | ATA_MSG_CTL = 0x0020, | |
85 | ATA_MSG_INTR = 0x0040, | |
86 | ATA_MSG_ERR = 0x0080, | |
87 | }; | |
88 | ||
89 | #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV) | |
90 | #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO) | |
91 | #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE) | |
92 | #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN) | |
93 | #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC) | |
94 | #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL) | |
95 | #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR) | |
96 | #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR) | |
97 | ||
98 | static inline u32 ata_msg_init(int dval, int default_msg_enable_bits) | |
99 | { | |
100 | if (dval < 0 || dval >= (sizeof(u32) * 8)) | |
101 | return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */ | |
102 | if (!dval) | |
103 | return 0; | |
104 | return (1 << dval) - 1; | |
105 | } | |
106 | ||
1da177e4 LT |
107 | /* defines only for the constants which don't work well as enums */ |
108 | #define ATA_TAG_POISON 0xfafbfcfdU | |
109 | ||
110 | /* move to PCI layer? */ | |
111 | static inline struct device *pci_dev_to_dev(struct pci_dev *pdev) | |
112 | { | |
113 | return &pdev->dev; | |
114 | } | |
115 | ||
116 | enum { | |
117 | /* various global constants */ | |
118 | LIBATA_MAX_PRD = ATA_MAX_PRD / 2, | |
d26fc955 | 119 | LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */ |
1da177e4 LT |
120 | ATA_MAX_PORTS = 8, |
121 | ATA_DEF_QUEUE = 1, | |
2ab7db1f | 122 | /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */ |
a6e6ce8e | 123 | ATA_MAX_QUEUE = 32, |
2ab7db1f | 124 | ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1, |
1da177e4 LT |
125 | ATA_MAX_BUS = 2, |
126 | ATA_DEF_BUSY_WAIT = 10000, | |
127 | ATA_SHORT_PAUSE = (HZ >> 6) + 1, | |
128 | ||
129 | ATA_SHT_EMULATED = 1, | |
130 | ATA_SHT_CMD_PER_LUN = 1, | |
131 | ATA_SHT_THIS_ID = -1, | |
cf482935 | 132 | ATA_SHT_USE_CLUSTERING = 1, |
1da177e4 LT |
133 | |
134 | /* struct ata_device stuff */ | |
949b38af TH |
135 | ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */ |
136 | ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */ | |
029f5468 | 137 | ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */ |
88e49034 | 138 | ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */ |
6fc49adb | 139 | ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */ |
6746544c TH |
140 | ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */ |
141 | ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */ | |
ea1dd4e1 | 142 | ATA_DFLAG_CFG_MASK = (1 << 8) - 1, |
949b38af | 143 | |
e5c9e081 | 144 | ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */ |
3343571d | 145 | ATA_DFLAG_NCQ_OFF = (1 << 9), /* device limited to non-NCQ mode */ |
13b8d09f | 146 | ATA_DFLAG_SPUNDOWN = (1 << 10), /* XXX: for spindown_compat */ |
72fa4b74 | 147 | ATA_DFLAG_INIT_MASK = (1 << 16) - 1, |
1da177e4 | 148 | |
abdda733 TH |
149 | ATA_DFLAG_DETACH = (1 << 16), |
150 | ATA_DFLAG_DETACHED = (1 << 17), | |
151 | ||
1da177e4 LT |
152 | ATA_DEV_UNKNOWN = 0, /* unknown device */ |
153 | ATA_DEV_ATA = 1, /* ATA device */ | |
154 | ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ | |
155 | ATA_DEV_ATAPI = 3, /* ATAPI device */ | |
156 | ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ | |
157 | ATA_DEV_NONE = 5, /* no device */ | |
158 | ||
159 | /* struct ata_port flags */ | |
949b38af | 160 | ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ |
1da177e4 | 161 | /* (doesn't imply presence) */ |
949b38af TH |
162 | ATA_FLAG_SATA = (1 << 1), |
163 | ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */ | |
164 | ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */ | |
165 | ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */ | |
166 | ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */ | |
167 | ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ | |
168 | ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ | |
169 | ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ | |
7395acb2 TH |
170 | ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD |
171 | * doesn't handle PIO interrupts */ | |
172 | ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ | |
abdda733 TH |
173 | ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */ |
174 | ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H | |
175 | * Register FIS clearing BSY */ | |
7395acb2 | 176 | ATA_FLAG_DEBUGMSG = (1 << 13), |
b2a8bbe6 | 177 | ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ |
f834e49f | 178 | ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */ |
3cadbcc0 | 179 | ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */ |
949b38af | 180 | |
b51e9e5d TH |
181 | /* The following flag belongs to ap->pflags but is kept in |
182 | * ap->flags because it's referenced in many LLDs and will be | |
183 | * removed in not-too-distant future. | |
184 | */ | |
185 | ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */ | |
186 | ||
187 | /* bits 24:31 of ap->flags are reserved for LLD specific flags */ | |
9ec957f2 | 188 | |
b51e9e5d TH |
189 | /* struct ata_port pflags */ |
190 | ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ | |
191 | ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ | |
192 | ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ | |
193 | ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ | |
194 | ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ | |
195 | ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */ | |
196 | ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ | |
f4d6d004 | 197 | ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ |
949b38af | 198 | |
b51e9e5d | 199 | ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ |
500530f6 | 200 | ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ |
64578a3d | 201 | ATA_PFLAG_GTM_VALID = (1 << 19), /* acpi_gtm data valid */ |
949b38af TH |
202 | |
203 | /* struct ata_queued_cmd flags */ | |
204 | ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ | |
205 | ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */ | |
206 | ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */ | |
1da177e4 | 207 | ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, |
27197367 | 208 | ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ |
e61e0672 TH |
209 | ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ |
210 | ||
9ec957f2 TH |
211 | ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ |
212 | ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ | |
213 | ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ | |
1da177e4 | 214 | |
4e5ec5db | 215 | /* host set flags */ |
cca3974e | 216 | ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ |
ecef7253 | 217 | ATA_HOST_STARTED = (1 << 1), /* Host started */ |
9bec2e38 | 218 | |
b8b275ef TH |
219 | /* bits 24:31 of host->flags are reserved for LLD specific flags */ |
220 | ||
1da177e4 | 221 | /* various lengths of time */ |
8d238e01 AC |
222 | ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */ |
223 | ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */ | |
a2a7a662 TH |
224 | ATA_TMOUT_INTERNAL = 30 * HZ, |
225 | ATA_TMOUT_INTERNAL_QUICK = 5 * HZ, | |
1da177e4 LT |
226 | |
227 | /* ATA bus states */ | |
228 | BUS_UNKNOWN = 0, | |
229 | BUS_DMA = 1, | |
230 | BUS_IDLE = 2, | |
231 | BUS_NOINTR = 3, | |
232 | BUS_NODATA = 4, | |
233 | BUS_TIMER = 5, | |
234 | BUS_PIO = 6, | |
235 | BUS_EDD = 7, | |
236 | BUS_IDENTIFY = 8, | |
237 | BUS_PACKET = 9, | |
238 | ||
239 | /* SATA port states */ | |
240 | PORT_UNKNOWN = 0, | |
241 | PORT_ENABLED = 1, | |
242 | PORT_DISABLED = 2, | |
243 | ||
244 | /* encoding various smaller bitmaps into a single | |
1da7b0d0 | 245 | * unsigned int bitmap |
1da177e4 | 246 | */ |
b352e57d AC |
247 | ATA_BITS_PIO = 7, |
248 | ATA_BITS_MWDMA = 5, | |
1da7b0d0 TH |
249 | ATA_BITS_UDMA = 8, |
250 | ||
251 | ATA_SHIFT_PIO = 0, | |
252 | ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO, | |
253 | ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA, | |
254 | ||
255 | ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO, | |
256 | ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA, | |
257 | ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA, | |
cedc9a47 JG |
258 | |
259 | /* size of buffer to pad xfers ending on unaligned boundaries */ | |
260 | ATA_DMA_PAD_SZ = 4, | |
261 | ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE, | |
949b38af | 262 | |
0c247c55 TH |
263 | /* ering size */ |
264 | ATA_ERING_SIZE = 32, | |
265 | ||
f3e81b19 TH |
266 | /* desc_len for ata_eh_info and context */ |
267 | ATA_EH_DESC_LEN = 80, | |
268 | ||
9be1e979 TH |
269 | /* reset / recovery action types */ |
270 | ATA_EH_REVALIDATE = (1 << 0), | |
271 | ATA_EH_SOFTRESET = (1 << 1), | |
272 | ATA_EH_HARDRESET = (1 << 2), | |
273 | ||
274 | ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, | |
9666f400 | 275 | ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE, |
9be1e979 | 276 | |
f3e81b19 | 277 | /* ata_eh_info->flags */ |
abdda733 | 278 | ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ |
13abf50d | 279 | ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */ |
1cdaf534 TH |
280 | ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ |
281 | ATA_EHI_QUIET = (1 << 3), /* be quiet */ | |
abdda733 | 282 | |
0d64a233 TH |
283 | ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */ |
284 | ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ | |
285 | ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ | |
286 | ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ | |
287 | ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */ | |
f3e81b19 | 288 | |
0d64a233 | 289 | ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, |
13abf50d TH |
290 | ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK, |
291 | ||
ad9e2762 TH |
292 | /* max repeat if error condition is still set after ->error_handler */ |
293 | ATA_EH_MAX_REPEAT = 5, | |
294 | ||
14d2bac1 TH |
295 | /* how hard are we gonna try to probe/recover devices */ |
296 | ATA_PROBE_MAX_TRIES = 3, | |
022bdb07 | 297 | ATA_EH_DEV_TRIES = 3, |
f5914a46 | 298 | |
93590859 AC |
299 | /* Horkage types. May be set by libata or controller on drives |
300 | (some horkage may be drive/controller pair dependant */ | |
301 | ||
302 | ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ | |
6919a0a6 AC |
303 | ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ |
304 | ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ | |
18d6e9d5 | 305 | ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ |
16c55b03 | 306 | ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */ |
1da177e4 LT |
307 | }; |
308 | ||
14be71f4 | 309 | enum hsm_task_states { |
c56b14d2 | 310 | HSM_ST_IDLE, /* no command on going */ |
71527647 AL |
311 | HSM_ST_FIRST, /* (waiting the device to) |
312 | write CDB or first data block */ | |
c56b14d2 AL |
313 | HSM_ST, /* (waiting the device to) transfer data */ |
314 | HSM_ST_LAST, /* (waiting the device to) complete command */ | |
c56b14d2 | 315 | HSM_ST_ERR, /* error */ |
1da177e4 LT |
316 | }; |
317 | ||
a7dac447 | 318 | enum ata_completion_errors { |
11a56d24 TH |
319 | AC_ERR_DEV = (1 << 0), /* device reported error */ |
320 | AC_ERR_HSM = (1 << 1), /* host state machine violation */ | |
321 | AC_ERR_TIMEOUT = (1 << 2), /* timeout */ | |
322 | AC_ERR_MEDIA = (1 << 3), /* media error */ | |
323 | AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ | |
324 | AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ | |
325 | AC_ERR_SYSTEM = (1 << 6), /* system error */ | |
326 | AC_ERR_INVALID = (1 << 7), /* invalid argument */ | |
327 | AC_ERR_OTHER = (1 << 8), /* unknown */ | |
55a8e2c8 | 328 | AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ |
5335b729 | 329 | AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */ |
a7dac447 JG |
330 | }; |
331 | ||
1da177e4 LT |
332 | /* forward declarations */ |
333 | struct scsi_device; | |
334 | struct ata_port_operations; | |
335 | struct ata_port; | |
336 | struct ata_queued_cmd; | |
337 | ||
338 | /* typedefs */ | |
77853bf2 | 339 | typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); |
d4b2bab4 TH |
340 | typedef int (*ata_prereset_fn_t)(struct ata_port *ap, unsigned long deadline); |
341 | typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes, | |
342 | unsigned long deadline); | |
f5914a46 | 343 | typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes); |
1da177e4 LT |
344 | |
345 | struct ata_ioports { | |
0d5ff566 TH |
346 | void __iomem *cmd_addr; |
347 | void __iomem *data_addr; | |
348 | void __iomem *error_addr; | |
349 | void __iomem *feature_addr; | |
350 | void __iomem *nsect_addr; | |
351 | void __iomem *lbal_addr; | |
352 | void __iomem *lbam_addr; | |
353 | void __iomem *lbah_addr; | |
354 | void __iomem *device_addr; | |
355 | void __iomem *status_addr; | |
356 | void __iomem *command_addr; | |
357 | void __iomem *altstatus_addr; | |
358 | void __iomem *ctl_addr; | |
359 | void __iomem *bmdma_addr; | |
360 | void __iomem *scr_addr; | |
1da177e4 LT |
361 | }; |
362 | ||
cca3974e | 363 | struct ata_host { |
1da177e4 LT |
364 | spinlock_t lock; |
365 | struct device *dev; | |
366 | unsigned long irq; | |
2ec7df04 | 367 | unsigned long irq2; |
0d5ff566 | 368 | void __iomem * const *iomap; |
1da177e4 LT |
369 | unsigned int n_ports; |
370 | void *private_data; | |
057ace5e | 371 | const struct ata_port_operations *ops; |
5444a6f4 | 372 | unsigned long flags; |
fafbae87 TH |
373 | #ifdef CONFIG_ATA_ACPI |
374 | acpi_handle acpi_handle; | |
375 | #endif | |
032af1ce | 376 | struct ata_port *simplex_claimed; /* channel owning the DMA */ |
f0eb62b8 | 377 | struct ata_port *ports[0]; |
1da177e4 LT |
378 | }; |
379 | ||
380 | struct ata_queued_cmd { | |
381 | struct ata_port *ap; | |
382 | struct ata_device *dev; | |
383 | ||
384 | struct scsi_cmnd *scsicmd; | |
385 | void (*scsidone)(struct scsi_cmnd *); | |
386 | ||
387 | struct ata_taskfile tf; | |
388 | u8 cdb[ATAPI_CDB_LEN]; | |
389 | ||
390 | unsigned long flags; /* ATA_QCFLAG_xxx */ | |
391 | unsigned int tag; | |
392 | unsigned int n_elem; | |
cedc9a47 | 393 | unsigned int orig_n_elem; |
1da177e4 LT |
394 | |
395 | int dma_dir; | |
396 | ||
cedc9a47 | 397 | unsigned int pad_len; |
5a5dbd18 | 398 | unsigned int sect_size; |
cedc9a47 | 399 | |
1da177e4 LT |
400 | unsigned int nbytes; |
401 | unsigned int curbytes; | |
402 | ||
403 | unsigned int cursg; | |
404 | unsigned int cursg_ofs; | |
405 | ||
406 | struct scatterlist sgent; | |
cedc9a47 | 407 | struct scatterlist pad_sgent; |
1da177e4 LT |
408 | void *buf_virt; |
409 | ||
cedc9a47 JG |
410 | /* DO NOT iterate over __sg manually, use ata_for_each_sg() */ |
411 | struct scatterlist *__sg; | |
1da177e4 | 412 | |
a22e2eb0 | 413 | unsigned int err_mask; |
e61e0672 | 414 | struct ata_taskfile result_tf; |
1da177e4 LT |
415 | ata_qc_cb_t complete_fn; |
416 | ||
1da177e4 | 417 | void *private_data; |
1c50dc83 | 418 | void *lldd_task; |
1da177e4 LT |
419 | }; |
420 | ||
cca3974e | 421 | struct ata_port_stats { |
1da177e4 LT |
422 | unsigned long unhandled_irq; |
423 | unsigned long idle_irq; | |
424 | unsigned long rw_reqbuf; | |
425 | }; | |
426 | ||
0c247c55 TH |
427 | struct ata_ering_entry { |
428 | int is_io; | |
429 | unsigned int err_mask; | |
430 | u64 timestamp; | |
431 | }; | |
432 | ||
433 | struct ata_ering { | |
434 | int cursor; | |
435 | struct ata_ering_entry ring[ATA_ERING_SIZE]; | |
436 | }; | |
437 | ||
1da177e4 | 438 | struct ata_device { |
9af5c9c9 | 439 | struct ata_link *link; |
72fa4b74 | 440 | unsigned int devno; /* 0 or 1 */ |
1da177e4 | 441 | unsigned long flags; /* ATA_DFLAG_xxx */ |
75683fe7 | 442 | unsigned int horkage; /* List of broken features */ |
3edebac4 | 443 | struct scsi_device *sdev; /* attached SCSI device */ |
fafbae87 TH |
444 | #ifdef CONFIG_ATA_ACPI |
445 | acpi_handle acpi_handle; | |
446 | #endif | |
72fa4b74 TH |
447 | /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */ |
448 | u64 n_sectors; /* size of device, if ATA */ | |
1da177e4 | 449 | unsigned int class; /* ATA_DEV_xxx */ |
fe635c7e | 450 | u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ |
1da177e4 LT |
451 | u8 pio_mode; |
452 | u8 dma_mode; | |
453 | u8 xfer_mode; | |
454 | unsigned int xfer_shift; /* ATA_SHIFT_xxx */ | |
455 | ||
8cbd6df1 AL |
456 | unsigned int multi_count; /* sectors count for |
457 | READ/WRITE MULTIPLE */ | |
b00eec1d | 458 | unsigned int max_sectors; /* per-device max sectors */ |
6e7846e9 | 459 | unsigned int cdb_len; |
8bf62ece | 460 | |
acf356b1 TH |
461 | /* per-dev xfer mask */ |
462 | unsigned int pio_mask; | |
463 | unsigned int mwdma_mask; | |
464 | unsigned int udma_mask; | |
465 | ||
8bf62ece AL |
466 | /* for CHS addressing */ |
467 | u16 cylinders; /* Number of cylinders */ | |
468 | u16 heads; /* Number of heads */ | |
469 | u16 sectors; /* Number of sectors per track */ | |
0c247c55 TH |
470 | |
471 | /* error history */ | |
472 | struct ata_ering ering; | |
7d47e8d4 | 473 | int spdn_cnt; |
1da177e4 LT |
474 | }; |
475 | ||
72fa4b74 TH |
476 | /* Offset into struct ata_device. Fields above it are maintained |
477 | * acress device init. Fields below are zeroed. | |
478 | */ | |
479 | #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors) | |
480 | ||
f3e81b19 TH |
481 | struct ata_eh_info { |
482 | struct ata_device *dev; /* offending device */ | |
483 | u32 serror; /* SError from LLDD */ | |
484 | unsigned int err_mask; /* port-wide err_mask */ | |
485 | unsigned int action; /* ATA_EH_* action mask */ | |
47005f25 | 486 | unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ |
f3e81b19 | 487 | unsigned int flags; /* ATA_EHI_* flags */ |
abdda733 | 488 | |
abdda733 TH |
489 | unsigned int probe_mask; |
490 | ||
f3e81b19 TH |
491 | char desc[ATA_EH_DESC_LEN]; |
492 | int desc_len; | |
493 | }; | |
494 | ||
495 | struct ata_eh_context { | |
496 | struct ata_eh_info i; | |
497 | int tries[ATA_MAX_DEVICES]; | |
abdda733 TH |
498 | unsigned int classes[ATA_MAX_DEVICES]; |
499 | unsigned int did_probe_mask; | |
f3e81b19 TH |
500 | }; |
501 | ||
64578a3d TH |
502 | struct ata_acpi_drive |
503 | { | |
504 | u32 pio; | |
505 | u32 dma; | |
506 | } __packed; | |
507 | ||
508 | struct ata_acpi_gtm { | |
509 | struct ata_acpi_drive drive[2]; | |
510 | u32 flags; | |
511 | } __packed; | |
512 | ||
9af5c9c9 TH |
513 | struct ata_link { |
514 | struct ata_port *ap; | |
515 | ||
516 | unsigned int active_tag; /* active tag on this link */ | |
517 | u32 sactive; /* active NCQ commands */ | |
518 | ||
519 | unsigned int hw_sata_spd_limit; | |
520 | unsigned int sata_spd_limit; | |
521 | unsigned int sata_spd; /* current SATA PHY speed */ | |
522 | ||
523 | /* record runtime error info, protected by host_set lock */ | |
524 | struct ata_eh_info eh_info; | |
525 | /* EH context */ | |
526 | struct ata_eh_context eh_context; | |
527 | ||
528 | struct ata_device device[ATA_MAX_DEVICES]; | |
529 | }; | |
530 | ||
1da177e4 | 531 | struct ata_port { |
cca3974e | 532 | struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ |
057ace5e | 533 | const struct ata_port_operations *ops; |
ba6a1308 | 534 | spinlock_t *lock; |
1da177e4 | 535 | unsigned long flags; /* ATA_FLAG_xxx */ |
b51e9e5d | 536 | unsigned int pflags; /* ATA_PFLAG_xxx */ |
44877b4e TH |
537 | unsigned int print_id; /* user visible unique port ID */ |
538 | unsigned int port_no; /* 0 based port no. inside the host */ | |
1da177e4 LT |
539 | |
540 | struct ata_prd *prd; /* our SG list */ | |
541 | dma_addr_t prd_dma; /* and its DMA mapping */ | |
542 | ||
cedc9a47 JG |
543 | void *pad; /* array of DMA pad buffers */ |
544 | dma_addr_t pad_dma; | |
545 | ||
1da177e4 LT |
546 | struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ |
547 | ||
548 | u8 ctl; /* cache of ATA control register */ | |
549 | u8 last_ctl; /* Cache last written value */ | |
1da177e4 LT |
550 | unsigned int pio_mask; |
551 | unsigned int mwdma_mask; | |
552 | unsigned int udma_mask; | |
553 | unsigned int cbl; /* cable type; ATA_CBL_xxx */ | |
1da177e4 LT |
554 | |
555 | struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; | |
6cec4a39 | 556 | unsigned long qc_allocated; |
dedaf2b0 TH |
557 | unsigned int qc_active; |
558 | ||
9af5c9c9 | 559 | struct ata_link link; /* host default link */ |
1da177e4 | 560 | |
cca3974e JG |
561 | struct ata_port_stats stats; |
562 | struct ata_host *host; | |
2f1f610b | 563 | struct device *dev; |
1da177e4 | 564 | |
65f27f38 | 565 | void *port_task_data; |
52bad64d DH |
566 | struct delayed_work port_task; |
567 | struct delayed_work hotplug_task; | |
3b01b8af | 568 | struct work_struct scsi_rescan_task; |
86e45b6b | 569 | |
14be71f4 | 570 | unsigned int hsm_task_state; |
1da177e4 | 571 | |
bfd60579 | 572 | u32 msg_enable; |
a72ec4ce | 573 | struct list_head eh_done_q; |
c6cf9e99 | 574 | wait_queue_head_t eh_wait_q; |
bfd60579 | 575 | |
500530f6 TH |
576 | pm_message_t pm_mesg; |
577 | int *pm_result; | |
578 | ||
5ddf24c5 TH |
579 | struct timer_list fastdrain_timer; |
580 | unsigned long fastdrain_cnt; | |
581 | ||
1da177e4 | 582 | void *private_data; |
fe635c7e | 583 | |
fafbae87 TH |
584 | #ifdef CONFIG_ATA_ACPI |
585 | acpi_handle acpi_handle; | |
64578a3d | 586 | struct ata_acpi_gtm acpi_gtm; |
fafbae87 | 587 | #endif |
fe635c7e | 588 | u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ |
1da177e4 LT |
589 | }; |
590 | ||
591 | struct ata_port_operations { | |
592 | void (*port_disable) (struct ata_port *); | |
593 | ||
cd0d3bbc | 594 | void (*dev_config) (struct ata_device *); |
1da177e4 LT |
595 | |
596 | void (*set_piomode) (struct ata_port *, struct ata_device *); | |
597 | void (*set_dmamode) (struct ata_port *, struct ata_device *); | |
a76b62ca | 598 | unsigned long (*mode_filter) (struct ata_device *, unsigned long); |
1da177e4 | 599 | |
057ace5e | 600 | void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf); |
1da177e4 LT |
601 | void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); |
602 | ||
057ace5e | 603 | void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); |
1da177e4 LT |
604 | u8 (*check_status)(struct ata_port *ap); |
605 | u8 (*check_altstatus)(struct ata_port *ap); | |
1da177e4 LT |
606 | void (*dev_select)(struct ata_port *ap, unsigned int device); |
607 | ||
c19ba8af | 608 | void (*phy_reset) (struct ata_port *ap); /* obsolete */ |
b229a7b0 | 609 | int (*set_mode) (struct ata_port *ap, struct ata_device **r_failed_dev); |
c19ba8af | 610 | |
be0d18df AC |
611 | int (*cable_detect) (struct ata_port *ap); |
612 | ||
b229a7b0 | 613 | int (*check_atapi_dma) (struct ata_queued_cmd *qc); |
1da177e4 LT |
614 | |
615 | void (*bmdma_setup) (struct ata_queued_cmd *qc); | |
616 | void (*bmdma_start) (struct ata_queued_cmd *qc); | |
617 | ||
a6b2c5d4 AC |
618 | void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int); |
619 | ||
1da177e4 | 620 | void (*qc_prep) (struct ata_queued_cmd *qc); |
9a3d9eb0 | 621 | unsigned int (*qc_issue) (struct ata_queued_cmd *qc); |
1da177e4 | 622 | |
9ec957f2 TH |
623 | /* Error handlers. ->error_handler overrides ->eng_timeout and |
624 | * indicates that new-style EH is in place. | |
625 | */ | |
626 | void (*eng_timeout) (struct ata_port *ap); /* obsolete */ | |
627 | ||
628 | void (*freeze) (struct ata_port *ap); | |
629 | void (*thaw) (struct ata_port *ap); | |
630 | void (*error_handler) (struct ata_port *ap); | |
631 | void (*post_internal_cmd) (struct ata_queued_cmd *qc); | |
1da177e4 | 632 | |
7d12e780 | 633 | irq_handler_t irq_handler; |
1da177e4 | 634 | void (*irq_clear) (struct ata_port *); |
83625006 AI |
635 | u8 (*irq_on) (struct ata_port *); |
636 | u8 (*irq_ack) (struct ata_port *ap, unsigned int chk_drq); | |
1da177e4 | 637 | |
da3dbb17 TH |
638 | int (*scr_read) (struct ata_port *ap, unsigned int sc_reg, u32 *val); |
639 | int (*scr_write) (struct ata_port *ap, unsigned int sc_reg, u32 val); | |
1da177e4 | 640 | |
500530f6 TH |
641 | int (*port_suspend) (struct ata_port *ap, pm_message_t mesg); |
642 | int (*port_resume) (struct ata_port *ap); | |
643 | ||
1da177e4 LT |
644 | int (*port_start) (struct ata_port *ap); |
645 | void (*port_stop) (struct ata_port *ap); | |
646 | ||
cca3974e | 647 | void (*host_stop) (struct ata_host *host); |
1da177e4 | 648 | |
b73fc89f | 649 | void (*bmdma_stop) (struct ata_queued_cmd *qc); |
1da177e4 LT |
650 | u8 (*bmdma_status) (struct ata_port *ap); |
651 | }; | |
652 | ||
653 | struct ata_port_info { | |
d0be4a7d | 654 | struct scsi_host_template *sht; |
cca3974e | 655 | unsigned long flags; |
1da177e4 LT |
656 | unsigned long pio_mask; |
657 | unsigned long mwdma_mask; | |
658 | unsigned long udma_mask; | |
057ace5e | 659 | const struct ata_port_operations *port_ops; |
21b0ad4f | 660 | irq_handler_t irq_handler; |
e99f8b5e | 661 | void *private_data; |
1da177e4 LT |
662 | }; |
663 | ||
452503f9 AC |
664 | struct ata_timing { |
665 | unsigned short mode; /* ATA mode */ | |
666 | unsigned short setup; /* t1 */ | |
667 | unsigned short act8b; /* t2 for 8-bit I/O */ | |
668 | unsigned short rec8b; /* t2i for 8-bit I/O */ | |
669 | unsigned short cyc8b; /* t0 for 8-bit I/O */ | |
670 | unsigned short active; /* t2 or tD */ | |
671 | unsigned short recover; /* t2i or tK */ | |
672 | unsigned short cycle; /* t0 */ | |
673 | unsigned short udma; /* t2CYCTYP/2 */ | |
674 | }; | |
675 | ||
676 | #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin) | |
1da177e4 | 677 | |
e9c83914 TH |
678 | extern const unsigned long sata_deb_timing_normal[]; |
679 | extern const unsigned long sata_deb_timing_hotplug[]; | |
680 | extern const unsigned long sata_deb_timing_long[]; | |
681 | ||
dd5b06c4 | 682 | extern const struct ata_port_operations ata_dummy_port_ops; |
21b0ad4f | 683 | extern const struct ata_port_info ata_dummy_port_info; |
dd5b06c4 | 684 | |
e9c83914 TH |
685 | static inline const unsigned long * |
686 | sata_ehc_deb_timing(struct ata_eh_context *ehc) | |
687 | { | |
688 | if (ehc->i.flags & ATA_EHI_HOTPLUGGED) | |
689 | return sata_deb_timing_hotplug; | |
690 | else | |
691 | return sata_deb_timing_normal; | |
692 | } | |
d7bb4cc7 | 693 | |
dd5b06c4 TH |
694 | static inline int ata_port_is_dummy(struct ata_port *ap) |
695 | { | |
696 | return ap->ops == &ata_dummy_port_ops; | |
697 | } | |
698 | ||
936fd732 | 699 | extern void sata_print_link_status(struct ata_link *link); |
1da177e4 LT |
700 | extern void ata_port_probe(struct ata_port *); |
701 | extern void __sata_phy_reset(struct ata_port *ap); | |
702 | extern void sata_phy_reset(struct ata_port *ap); | |
703 | extern void ata_bus_reset(struct ata_port *ap); | |
936fd732 TH |
704 | extern int sata_set_spd(struct ata_link *link); |
705 | extern int sata_link_debounce(struct ata_link *link, | |
706 | const unsigned long *params, unsigned long deadline); | |
707 | extern int sata_link_resume(struct ata_link *link, const unsigned long *params, | |
708 | unsigned long deadline); | |
d4b2bab4 TH |
709 | extern int ata_std_prereset(struct ata_port *ap, unsigned long deadline); |
710 | extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes, | |
711 | unsigned long deadline); | |
712 | extern int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing, | |
713 | unsigned long deadline); | |
714 | extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class, | |
715 | unsigned long deadline); | |
c2bd5804 | 716 | extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes); |
1da177e4 LT |
717 | extern void ata_port_disable(struct ata_port *); |
718 | extern void ata_std_ports(struct ata_ioports *ioaddr); | |
719 | #ifdef CONFIG_PCI | |
1626aeb8 TH |
720 | extern int ata_pci_init_one (struct pci_dev *pdev, |
721 | const struct ata_port_info * const * ppi); | |
1da177e4 | 722 | extern void ata_pci_remove_one (struct pci_dev *pdev); |
6ffa01d8 | 723 | #ifdef CONFIG_PM |
3c5100c1 | 724 | extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); |
553c4aa6 | 725 | extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); |
3c5100c1 | 726 | extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); |
9b847548 | 727 | extern int ata_pci_device_resume(struct pci_dev *pdev); |
6ffa01d8 | 728 | #endif |
17bb34a3 | 729 | extern int ata_pci_clear_simplex(struct pci_dev *pdev); |
1da177e4 | 730 | #endif /* CONFIG_PCI */ |
f3187195 | 731 | extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); |
f5cda257 TH |
732 | extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, |
733 | const struct ata_port_info * const * ppi, int n_ports); | |
ecef7253 | 734 | extern int ata_host_start(struct ata_host *host); |
f3187195 TH |
735 | extern int ata_host_register(struct ata_host *host, |
736 | struct scsi_host_template *sht); | |
f5cda257 TH |
737 | extern int ata_host_activate(struct ata_host *host, int irq, |
738 | irq_handler_t irq_handler, unsigned long irq_flags, | |
739 | struct scsi_host_template *sht); | |
0529c159 | 740 | extern void ata_host_detach(struct ata_host *host); |
cca3974e JG |
741 | extern void ata_host_init(struct ata_host *, struct device *, |
742 | unsigned long, const struct ata_port_operations *); | |
193515d5 | 743 | extern int ata_scsi_detect(struct scsi_host_template *sht); |
1da177e4 LT |
744 | extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); |
745 | extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); | |
80289167 | 746 | extern void ata_sas_port_destroy(struct ata_port *); |
cca3974e | 747 | extern struct ata_port *ata_sas_port_alloc(struct ata_host *, |
80289167 BK |
748 | struct ata_port_info *, struct Scsi_Host *); |
749 | extern int ata_sas_port_init(struct ata_port *); | |
750 | extern int ata_sas_port_start(struct ata_port *ap); | |
751 | extern void ata_sas_port_stop(struct ata_port *ap); | |
752 | extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); | |
753 | extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), | |
754 | struct ata_port *ap); | |
1da177e4 | 755 | extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); |
936fd732 TH |
756 | extern int sata_scr_valid(struct ata_link *link); |
757 | extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); | |
758 | extern int sata_scr_write(struct ata_link *link, int reg, u32 val); | |
759 | extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); | |
760 | extern int ata_link_online(struct ata_link *link); | |
761 | extern int ata_link_offline(struct ata_link *link); | |
6ffa01d8 | 762 | #ifdef CONFIG_PM |
cca3974e JG |
763 | extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); |
764 | extern void ata_host_resume(struct ata_host *host); | |
6ffa01d8 | 765 | #endif |
67846b30 | 766 | extern int ata_ratelimit(void); |
d1adc1bb TH |
767 | extern int ata_busy_sleep(struct ata_port *ap, |
768 | unsigned long timeout_pat, unsigned long timeout); | |
d4b2bab4 | 769 | extern int ata_wait_ready(struct ata_port *ap, unsigned long deadline); |
65f27f38 | 770 | extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn, |
86e45b6b | 771 | void *data, unsigned long delay); |
c22daff4 TH |
772 | extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, |
773 | unsigned long interval_msec, | |
774 | unsigned long timeout_msec); | |
a619f981 | 775 | extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *); |
67846b30 | 776 | |
1da177e4 LT |
777 | /* |
778 | * Default driver ops implementations | |
779 | */ | |
057ace5e | 780 | extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); |
1da177e4 | 781 | extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); |
9977126c TH |
782 | extern void ata_tf_to_fis(const struct ata_taskfile *tf, |
783 | u8 pmp, int is_cmd, u8 *fis); | |
057ace5e | 784 | extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); |
1da177e4 LT |
785 | extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); |
786 | extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); | |
787 | extern u8 ata_check_status(struct ata_port *ap); | |
788 | extern u8 ata_altstatus(struct ata_port *ap); | |
057ace5e | 789 | extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf); |
1da177e4 | 790 | extern int ata_port_start (struct ata_port *ap); |
d92e74d3 | 791 | extern int ata_sff_port_start (struct ata_port *ap); |
7d12e780 | 792 | extern irqreturn_t ata_interrupt (int irq, void *dev_instance); |
0d5ff566 TH |
793 | extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf, |
794 | unsigned int buflen, int write_data); | |
795 | extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, | |
796 | unsigned int buflen, int write_data); | |
d26fc955 | 797 | extern void ata_dumb_qc_prep(struct ata_queued_cmd *qc); |
1da177e4 | 798 | extern void ata_qc_prep(struct ata_queued_cmd *qc); |
e46834cd | 799 | extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); |
9a3d9eb0 | 800 | extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc); |
1da177e4 LT |
801 | extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, |
802 | unsigned int buflen); | |
803 | extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, | |
804 | unsigned int n_elem); | |
057ace5e | 805 | extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); |
10305f0f | 806 | extern void ata_dev_disable(struct ata_device *adev); |
6a62a04d TH |
807 | extern void ata_id_string(const u16 *id, unsigned char *s, |
808 | unsigned int ofs, unsigned int len); | |
809 | extern void ata_id_c_string(const u16 *id, unsigned char *s, | |
810 | unsigned int ofs, unsigned int len); | |
10305f0f | 811 | extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown); |
1da177e4 LT |
812 | extern void ata_bmdma_setup (struct ata_queued_cmd *qc); |
813 | extern void ata_bmdma_start (struct ata_queued_cmd *qc); | |
b73fc89f | 814 | extern void ata_bmdma_stop(struct ata_queued_cmd *qc); |
1da177e4 LT |
815 | extern u8 ata_bmdma_status(struct ata_port *ap); |
816 | extern void ata_bmdma_irq_clear(struct ata_port *ap); | |
6d97dbd7 TH |
817 | extern void ata_bmdma_freeze(struct ata_port *ap); |
818 | extern void ata_bmdma_thaw(struct ata_port *ap); | |
f5914a46 | 819 | extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
6d97dbd7 TH |
820 | ata_reset_fn_t softreset, |
821 | ata_reset_fn_t hardreset, | |
822 | ata_postreset_fn_t postreset); | |
823 | extern void ata_bmdma_error_handler(struct ata_port *ap); | |
824 | extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); | |
9a1004d0 TH |
825 | extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, |
826 | u8 status, int in_wq); | |
f686bcb8 | 827 | extern void ata_qc_complete(struct ata_queued_cmd *qc); |
dedaf2b0 TH |
828 | extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, |
829 | void (*finish_qc)(struct ata_queued_cmd *)); | |
3373efd8 | 830 | extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1da177e4 LT |
831 | void (*done)(struct scsi_cmnd *)); |
832 | extern int ata_std_bios_param(struct scsi_device *sdev, | |
833 | struct block_device *bdev, | |
834 | sector_t capacity, int geom[]); | |
835 | extern int ata_scsi_slave_config(struct scsi_device *sdev); | |
83c47bcb | 836 | extern void ata_scsi_slave_destroy(struct scsi_device *sdev); |
a6e6ce8e TH |
837 | extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, |
838 | int queue_depth); | |
3373efd8 | 839 | extern struct ata_device *ata_dev_pair(struct ata_device *adev); |
04351821 | 840 | extern int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev); |
83625006 AI |
841 | extern u8 ata_irq_on(struct ata_port *ap); |
842 | extern u8 ata_dummy_irq_on(struct ata_port *ap); | |
843 | extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq); | |
844 | extern u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq); | |
1da177e4 | 845 | |
be0d18df AC |
846 | extern int ata_cable_40wire(struct ata_port *ap); |
847 | extern int ata_cable_80wire(struct ata_port *ap); | |
848 | extern int ata_cable_sata(struct ata_port *ap); | |
849 | extern int ata_cable_unknown(struct ata_port *ap); | |
850 | ||
452503f9 AC |
851 | /* |
852 | * Timing helpers | |
853 | */ | |
1bc4ccff AC |
854 | |
855 | extern unsigned int ata_pio_need_iordy(const struct ata_device *); | |
452503f9 AC |
856 | extern int ata_timing_compute(struct ata_device *, unsigned short, |
857 | struct ata_timing *, int, int); | |
858 | extern void ata_timing_merge(const struct ata_timing *, | |
859 | const struct ata_timing *, struct ata_timing *, | |
860 | unsigned int); | |
861 | ||
862 | enum { | |
863 | ATA_TIMING_SETUP = (1 << 0), | |
864 | ATA_TIMING_ACT8B = (1 << 1), | |
865 | ATA_TIMING_REC8B = (1 << 2), | |
866 | ATA_TIMING_CYC8B = (1 << 3), | |
867 | ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | | |
868 | ATA_TIMING_CYC8B, | |
869 | ATA_TIMING_ACTIVE = (1 << 4), | |
870 | ATA_TIMING_RECOVER = (1 << 5), | |
871 | ATA_TIMING_CYCLE = (1 << 6), | |
872 | ATA_TIMING_UDMA = (1 << 7), | |
873 | ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | | |
874 | ATA_TIMING_REC8B | ATA_TIMING_CYC8B | | |
875 | ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | | |
876 | ATA_TIMING_CYCLE | ATA_TIMING_UDMA, | |
877 | }; | |
878 | ||
1da177e4 LT |
879 | |
880 | #ifdef CONFIG_PCI | |
881 | struct pci_bits { | |
882 | unsigned int reg; /* PCI config register to read */ | |
883 | unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ | |
884 | unsigned long mask; | |
885 | unsigned long val; | |
886 | }; | |
887 | ||
d583bc18 | 888 | extern int ata_pci_init_sff_host(struct ata_host *host); |
1626aeb8 | 889 | extern int ata_pci_init_bmdma(struct ata_host *host); |
d583bc18 TH |
890 | extern int ata_pci_prepare_sff_host(struct pci_dev *pdev, |
891 | const struct ata_port_info * const * ppi, | |
892 | struct ata_host **r_host); | |
057ace5e | 893 | extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); |
a76b62ca | 894 | extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long); |
1da177e4 LT |
895 | #endif /* CONFIG_PCI */ |
896 | ||
ece1d636 TH |
897 | /* |
898 | * EH | |
899 | */ | |
ece1d636 | 900 | extern void ata_eng_timeout(struct ata_port *ap); |
7b70fc03 TH |
901 | |
902 | extern void ata_port_schedule_eh(struct ata_port *ap); | |
903 | extern int ata_port_abort(struct ata_port *ap); | |
e3180499 TH |
904 | extern int ata_port_freeze(struct ata_port *ap); |
905 | ||
906 | extern void ata_eh_freeze_port(struct ata_port *ap); | |
907 | extern void ata_eh_thaw_port(struct ata_port *ap); | |
7b70fc03 | 908 | |
ece1d636 TH |
909 | extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); |
910 | extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); | |
911 | ||
f5914a46 TH |
912 | extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
913 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
914 | ata_postreset_fn_t postreset); | |
022bdb07 | 915 | |
61440db6 TH |
916 | /* |
917 | * printk helpers | |
918 | */ | |
919 | #define ata_port_printk(ap, lv, fmt, args...) \ | |
44877b4e | 920 | printk(lv"ata%u: "fmt, (ap)->print_id , ##args) |
61440db6 | 921 | |
9af5c9c9 TH |
922 | #define ata_link_printk(link, lv, fmt, args...) \ |
923 | printk(lv"ata%u: "fmt, (link)->ap->print_id , ##args) | |
924 | ||
61440db6 | 925 | #define ata_dev_printk(dev, lv, fmt, args...) \ |
9af5c9c9 | 926 | printk(lv"ata%u.%02u: "fmt, (dev)->link->ap->print_id, (dev)->devno , ##args) |
1da177e4 | 927 | |
f3e81b19 TH |
928 | /* |
929 | * ata_eh_info helpers | |
930 | */ | |
b64bbc39 TH |
931 | extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...); |
932 | extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...); | |
933 | extern void ata_ehi_clear_desc(struct ata_eh_info *ehi); | |
f3e81b19 | 934 | |
f8f1e1cc | 935 | static inline void ata_ehi_schedule_probe(struct ata_eh_info *ehi) |
084fe639 | 936 | { |
f8f1e1cc | 937 | ehi->flags |= ATA_EHI_RESUME_LINK; |
084fe639 TH |
938 | ehi->action |= ATA_EH_SOFTRESET; |
939 | ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; | |
940 | } | |
941 | ||
c0b6c037 TH |
942 | static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) |
943 | { | |
f8f1e1cc TH |
944 | ata_ehi_schedule_probe(ehi); |
945 | ehi->flags |= ATA_EHI_HOTPLUGGED; | |
c0b6c037 TH |
946 | ehi->err_mask |= AC_ERR_ATA_BUS; |
947 | } | |
948 | ||
61440db6 TH |
949 | /* |
950 | * qc helpers | |
951 | */ | |
972c26bd JG |
952 | static inline int |
953 | ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc) | |
954 | { | |
955 | if (sg == &qc->pad_sgent) | |
956 | return 1; | |
957 | if (qc->pad_len) | |
958 | return 0; | |
959 | if (((sg - qc->__sg) + 1) == qc->n_elem) | |
960 | return 1; | |
961 | return 0; | |
962 | } | |
963 | ||
cc1887f3 TH |
964 | static inline struct scatterlist * |
965 | ata_qc_first_sg(struct ata_queued_cmd *qc) | |
966 | { | |
967 | if (qc->n_elem) | |
968 | return qc->__sg; | |
969 | if (qc->pad_len) | |
970 | return &qc->pad_sgent; | |
971 | return NULL; | |
972 | } | |
973 | ||
cedc9a47 JG |
974 | static inline struct scatterlist * |
975 | ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc) | |
976 | { | |
977 | if (sg == &qc->pad_sgent) | |
978 | return NULL; | |
979 | if (++sg - qc->__sg < qc->n_elem) | |
980 | return sg; | |
cc1887f3 TH |
981 | if (qc->pad_len) |
982 | return &qc->pad_sgent; | |
983 | return NULL; | |
cedc9a47 JG |
984 | } |
985 | ||
986 | #define ata_for_each_sg(sg, qc) \ | |
cc1887f3 | 987 | for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc)) |
cedc9a47 | 988 | |
1da177e4 LT |
989 | static inline unsigned int ata_tag_valid(unsigned int tag) |
990 | { | |
991 | return (tag < ATA_MAX_QUEUE) ? 1 : 0; | |
992 | } | |
993 | ||
2ab7db1f TH |
994 | static inline unsigned int ata_tag_internal(unsigned int tag) |
995 | { | |
996 | return tag == ATA_MAX_QUEUE - 1; | |
997 | } | |
998 | ||
5806db22 TH |
999 | /* |
1000 | * device helpers | |
1001 | */ | |
e1211e3f | 1002 | static inline unsigned int ata_class_enabled(unsigned int class) |
597afd21 TH |
1003 | { |
1004 | return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI; | |
1005 | } | |
1006 | ||
e1211e3f | 1007 | static inline unsigned int ata_class_disabled(unsigned int class) |
1da177e4 | 1008 | { |
e1211e3f TH |
1009 | return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP; |
1010 | } | |
1011 | ||
002c8054 TH |
1012 | static inline unsigned int ata_class_absent(unsigned int class) |
1013 | { | |
1014 | return !ata_class_enabled(class) && !ata_class_disabled(class); | |
1015 | } | |
1016 | ||
e1211e3f TH |
1017 | static inline unsigned int ata_dev_enabled(const struct ata_device *dev) |
1018 | { | |
1019 | return ata_class_enabled(dev->class); | |
1020 | } | |
1021 | ||
1022 | static inline unsigned int ata_dev_disabled(const struct ata_device *dev) | |
1023 | { | |
1024 | return ata_class_disabled(dev->class); | |
1da177e4 LT |
1025 | } |
1026 | ||
002c8054 TH |
1027 | static inline unsigned int ata_dev_absent(const struct ata_device *dev) |
1028 | { | |
1029 | return ata_class_absent(dev->class); | |
1030 | } | |
1031 | ||
5806db22 | 1032 | /* |
f58229f8 | 1033 | * link helpers |
5806db22 | 1034 | */ |
f58229f8 | 1035 | static inline int ata_link_max_devices(const struct ata_link *link) |
5806db22 | 1036 | { |
f58229f8 | 1037 | if (link->ap->flags & ATA_FLAG_SLAVE_POSS) |
5806db22 TH |
1038 | return 2; |
1039 | return 1; | |
1040 | } | |
1041 | ||
f58229f8 TH |
1042 | #define ata_port_for_each_link(lk, ap) \ |
1043 | for ((lk) = &(ap)->link; (lk); (lk) = NULL) | |
1044 | ||
1045 | #define ata_link_for_each_dev(dev, link) \ | |
1046 | for ((dev) = (link)->device; \ | |
1047 | (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \ | |
1048 | (dev)++) | |
1049 | ||
1050 | #define ata_link_for_each_dev_reverse(dev, link) \ | |
1051 | for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \ | |
1052 | (dev) >= (link)->device || ((dev) = NULL); (dev)--) | |
5806db22 | 1053 | |
1da177e4 LT |
1054 | static inline u8 ata_chk_status(struct ata_port *ap) |
1055 | { | |
1056 | return ap->ops->check_status(ap); | |
1057 | } | |
1058 | ||
6d1245bf TH |
1059 | /** |
1060 | * ata_ncq_enabled - Test whether NCQ is enabled | |
1061 | * @dev: ATA device to test for | |
1062 | * | |
1063 | * LOCKING: | |
1064 | * spin_lock_irqsave(host lock) | |
1065 | * | |
1066 | * RETURNS: | |
1067 | * 1 if NCQ is enabled for @dev, 0 otherwise. | |
1068 | */ | |
1069 | static inline int ata_ncq_enabled(struct ata_device *dev) | |
1070 | { | |
1071 | return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | | |
1072 | ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; | |
1073 | } | |
0baab86b EF |
1074 | |
1075 | /** | |
1076 | * ata_pause - Flush writes and pause 400 nanoseconds. | |
1077 | * @ap: Port to wait for. | |
1078 | * | |
1079 | * LOCKING: | |
1080 | * Inherited from caller. | |
1081 | */ | |
1082 | ||
1da177e4 LT |
1083 | static inline void ata_pause(struct ata_port *ap) |
1084 | { | |
1085 | ata_altstatus(ap); | |
1086 | ndelay(400); | |
1087 | } | |
1088 | ||
0baab86b EF |
1089 | |
1090 | /** | |
1091 | * ata_busy_wait - Wait for a port status register | |
1092 | * @ap: Port to wait for. | |
0777721c A |
1093 | * @bits: bits that must be clear |
1094 | * @max: number of 10uS waits to perform | |
0baab86b EF |
1095 | * |
1096 | * Waits up to max*10 microseconds for the selected bits in the port's | |
1097 | * status register to be cleared. | |
1098 | * Returns final value of status register. | |
1099 | * | |
1100 | * LOCKING: | |
1101 | * Inherited from caller. | |
1102 | */ | |
1103 | ||
1da177e4 LT |
1104 | static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, |
1105 | unsigned int max) | |
1106 | { | |
1107 | u8 status; | |
1108 | ||
1109 | do { | |
1110 | udelay(10); | |
1111 | status = ata_chk_status(ap); | |
1112 | max--; | |
d1adc1bb | 1113 | } while (status != 0xff && (status & bits) && (max > 0)); |
1da177e4 LT |
1114 | |
1115 | return status; | |
1116 | } | |
1117 | ||
0baab86b EF |
1118 | |
1119 | /** | |
1120 | * ata_wait_idle - Wait for a port to be idle. | |
1121 | * @ap: Port to wait for. | |
1122 | * | |
1123 | * Waits up to 10ms for port's BUSY and DRQ signals to clear. | |
1124 | * Returns final value of status register. | |
1125 | * | |
1126 | * LOCKING: | |
1127 | * Inherited from caller. | |
1128 | */ | |
1129 | ||
1da177e4 LT |
1130 | static inline u8 ata_wait_idle(struct ata_port *ap) |
1131 | { | |
1132 | u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); | |
1133 | ||
55f3952d TH |
1134 | if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) |
1135 | DPRINTK("ATA: abnormal status 0x%X on port 0x%p\n", | |
1136 | status, ap->ioaddr.status_addr); | |
1da177e4 LT |
1137 | |
1138 | return status; | |
1139 | } | |
1140 | ||
1141 | static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) | |
1142 | { | |
1143 | qc->tf.ctl |= ATA_NIEN; | |
1144 | } | |
1145 | ||
f69499f4 TH |
1146 | static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, |
1147 | unsigned int tag) | |
1da177e4 LT |
1148 | { |
1149 | if (likely(ata_tag_valid(tag))) | |
1150 | return &ap->qcmd[tag]; | |
1151 | return NULL; | |
1152 | } | |
1153 | ||
f69499f4 TH |
1154 | static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, |
1155 | unsigned int tag) | |
1156 | { | |
1157 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
1158 | ||
1159 | if (unlikely(!qc) || !ap->ops->error_handler) | |
1160 | return qc; | |
1161 | ||
1162 | if ((qc->flags & (ATA_QCFLAG_ACTIVE | | |
1163 | ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) | |
1164 | return qc; | |
1165 | ||
1166 | return NULL; | |
1167 | } | |
1168 | ||
3373efd8 | 1169 | static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) |
1da177e4 LT |
1170 | { |
1171 | memset(tf, 0, sizeof(*tf)); | |
1172 | ||
9af5c9c9 | 1173 | tf->ctl = dev->link->ap->ctl; |
3373efd8 | 1174 | if (dev->devno == 0) |
1da177e4 LT |
1175 | tf->device = ATA_DEVICE_OBS; |
1176 | else | |
1177 | tf->device = ATA_DEVICE_OBS | ATA_DEV1; | |
1178 | } | |
1179 | ||
2c13b7ce JG |
1180 | static inline void ata_qc_reinit(struct ata_queued_cmd *qc) |
1181 | { | |
501e0c50 | 1182 | qc->dma_dir = DMA_NONE; |
2c13b7ce JG |
1183 | qc->__sg = NULL; |
1184 | qc->flags = 0; | |
726f0785 | 1185 | qc->cursg = qc->cursg_ofs = 0; |
2c13b7ce | 1186 | qc->nbytes = qc->curbytes = 0; |
7a801184 | 1187 | qc->n_elem = 0; |
a22e2eb0 | 1188 | qc->err_mask = 0; |
d0f29485 | 1189 | qc->pad_len = 0; |
5a5dbd18 | 1190 | qc->sect_size = ATA_SECT_SIZE; |
2c13b7ce | 1191 | |
3373efd8 | 1192 | ata_tf_init(qc->dev, &qc->tf); |
e61e0672 TH |
1193 | |
1194 | /* init result_tf such that it indicates normal completion */ | |
1195 | qc->result_tf.command = ATA_DRDY; | |
1196 | qc->result_tf.feature = 0; | |
2c13b7ce JG |
1197 | } |
1198 | ||
057ace5e | 1199 | static inline int ata_try_flush_cache(const struct ata_device *dev) |
1da177e4 LT |
1200 | { |
1201 | return ata_id_wcache_enabled(dev->id) || | |
1202 | ata_id_has_flush(dev->id) || | |
1203 | ata_id_has_flush_ext(dev->id); | |
1204 | } | |
1205 | ||
a7dac447 JG |
1206 | static inline unsigned int ac_err_mask(u8 status) |
1207 | { | |
3655d1d3 | 1208 | if (status & (ATA_BUSY | ATA_DRQ)) |
11a56d24 | 1209 | return AC_ERR_HSM; |
a7dac447 JG |
1210 | if (status & (ATA_ERR | ATA_DF)) |
1211 | return AC_ERR_DEV; | |
1212 | return 0; | |
1213 | } | |
1214 | ||
1215 | static inline unsigned int __ac_err_mask(u8 status) | |
1216 | { | |
1217 | unsigned int mask = ac_err_mask(status); | |
1218 | if (mask == 0) | |
1219 | return AC_ERR_OTHER; | |
1220 | return mask; | |
1221 | } | |
1222 | ||
6037d6bb JG |
1223 | static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev) |
1224 | { | |
1225 | ap->pad_dma = 0; | |
f0d36efd TH |
1226 | ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ, |
1227 | &ap->pad_dma, GFP_KERNEL); | |
6037d6bb JG |
1228 | return (ap->pad == NULL) ? -ENOMEM : 0; |
1229 | } | |
1230 | ||
1231 | static inline void ata_pad_free(struct ata_port *ap, struct device *dev) | |
1232 | { | |
f0d36efd | 1233 | dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma); |
6037d6bb JG |
1234 | } |
1235 | ||
35bb94b1 JG |
1236 | static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) |
1237 | { | |
4911487a | 1238 | return *(struct ata_port **)&host->hostdata[0]; |
35bb94b1 JG |
1239 | } |
1240 | ||
1da177e4 | 1241 | #endif /* __LINUX_LIBATA_H__ */ |