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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> | |
32 | #include <asm/io.h> | |
33 | #include <linux/ata.h> | |
34 | #include <linux/workqueue.h> | |
35 | ||
36 | /* | |
37 | * compile-time options | |
38 | */ | |
39 | #undef ATA_DEBUG /* debugging output */ | |
40 | #undef ATA_VERBOSE_DEBUG /* yet more debugging output */ | |
41 | #undef ATA_IRQ_TRAP /* define to ack screaming irqs */ | |
42 | #undef ATA_NDEBUG /* define to disable quick runtime checks */ | |
1da177e4 LT |
43 | #undef ATA_ENABLE_PATA /* define to enable PATA support in some |
44 | * low-level drivers */ | |
45 | #undef ATAPI_ENABLE_DMADIR /* enables ATAPI DMADIR bridge support */ | |
46 | ||
47 | ||
48 | /* note: prints function name for you */ | |
49 | #ifdef ATA_DEBUG | |
50 | #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) | |
51 | #ifdef ATA_VERBOSE_DEBUG | |
52 | #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) | |
53 | #else | |
54 | #define VPRINTK(fmt, args...) | |
55 | #endif /* ATA_VERBOSE_DEBUG */ | |
56 | #else | |
57 | #define DPRINTK(fmt, args...) | |
58 | #define VPRINTK(fmt, args...) | |
59 | #endif /* ATA_DEBUG */ | |
60 | ||
61 | #ifdef ATA_NDEBUG | |
62 | #define assert(expr) | |
63 | #else | |
64 | #define assert(expr) \ | |
65 | if(unlikely(!(expr))) { \ | |
66 | printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%d\n", \ | |
67 | #expr,__FILE__,__FUNCTION__,__LINE__); \ | |
68 | } | |
69 | #endif | |
70 | ||
71 | /* defines only for the constants which don't work well as enums */ | |
72 | #define ATA_TAG_POISON 0xfafbfcfdU | |
73 | ||
74 | /* move to PCI layer? */ | |
75 | static inline struct device *pci_dev_to_dev(struct pci_dev *pdev) | |
76 | { | |
77 | return &pdev->dev; | |
78 | } | |
79 | ||
80 | enum { | |
81 | /* various global constants */ | |
82 | LIBATA_MAX_PRD = ATA_MAX_PRD / 2, | |
83 | ATA_MAX_PORTS = 8, | |
84 | ATA_DEF_QUEUE = 1, | |
85 | ATA_MAX_QUEUE = 1, | |
86 | ATA_MAX_SECTORS = 200, /* FIXME */ | |
87 | ATA_MAX_BUS = 2, | |
88 | ATA_DEF_BUSY_WAIT = 10000, | |
89 | ATA_SHORT_PAUSE = (HZ >> 6) + 1, | |
90 | ||
91 | ATA_SHT_EMULATED = 1, | |
92 | ATA_SHT_CMD_PER_LUN = 1, | |
93 | ATA_SHT_THIS_ID = -1, | |
94 | ATA_SHT_USE_CLUSTERING = 0, | |
95 | ||
96 | /* struct ata_device stuff */ | |
97 | ATA_DFLAG_LBA48 = (1 << 0), /* device supports LBA48 */ | |
98 | ATA_DFLAG_PIO = (1 << 1), /* device currently in PIO mode */ | |
99 | ATA_DFLAG_LOCK_SECTORS = (1 << 2), /* don't adjust max_sectors */ | |
8bf62ece | 100 | ATA_DFLAG_LBA = (1 << 3), /* device supports LBA */ |
1da177e4 LT |
101 | |
102 | ATA_DEV_UNKNOWN = 0, /* unknown device */ | |
103 | ATA_DEV_ATA = 1, /* ATA device */ | |
104 | ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ | |
105 | ATA_DEV_ATAPI = 3, /* ATAPI device */ | |
106 | ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ | |
107 | ATA_DEV_NONE = 5, /* no device */ | |
108 | ||
109 | /* struct ata_port flags */ | |
110 | ATA_FLAG_SLAVE_POSS = (1 << 1), /* host supports slave dev */ | |
111 | /* (doesn't imply presence) */ | |
112 | ATA_FLAG_PORT_DISABLED = (1 << 2), /* port is disabled, ignore it */ | |
113 | ATA_FLAG_SATA = (1 << 3), | |
114 | ATA_FLAG_NO_LEGACY = (1 << 4), /* no legacy mode check */ | |
115 | ATA_FLAG_SRST = (1 << 5), /* use ATA SRST, not E.D.D. */ | |
116 | ATA_FLAG_MMIO = (1 << 6), /* use MMIO, not PIO */ | |
117 | ATA_FLAG_SATA_RESET = (1 << 7), /* use COMRESET */ | |
118 | ATA_FLAG_PIO_DMA = (1 << 8), /* PIO cmds via DMA */ | |
c1389503 TH |
119 | ATA_FLAG_NOINTR = (1 << 9), /* FIXME: Remove this once |
120 | * proper HSM is in place. */ | |
1da177e4 LT |
121 | |
122 | ATA_QCFLAG_ACTIVE = (1 << 1), /* cmd not yet ack'd to scsi lyer */ | |
123 | ATA_QCFLAG_SG = (1 << 3), /* have s/g table? */ | |
124 | ATA_QCFLAG_SINGLE = (1 << 4), /* no s/g, just a single buffer */ | |
125 | ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, | |
126 | ||
127 | /* various lengths of time */ | |
128 | ATA_TMOUT_EDD = 5 * HZ, /* hueristic */ | |
129 | ATA_TMOUT_PIO = 30 * HZ, | |
130 | ATA_TMOUT_BOOT = 30 * HZ, /* hueristic */ | |
131 | ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* hueristic */ | |
132 | ATA_TMOUT_CDB = 30 * HZ, | |
133 | ATA_TMOUT_CDB_QUICK = 5 * HZ, | |
134 | ||
135 | /* ATA bus states */ | |
136 | BUS_UNKNOWN = 0, | |
137 | BUS_DMA = 1, | |
138 | BUS_IDLE = 2, | |
139 | BUS_NOINTR = 3, | |
140 | BUS_NODATA = 4, | |
141 | BUS_TIMER = 5, | |
142 | BUS_PIO = 6, | |
143 | BUS_EDD = 7, | |
144 | BUS_IDENTIFY = 8, | |
145 | BUS_PACKET = 9, | |
146 | ||
147 | /* SATA port states */ | |
148 | PORT_UNKNOWN = 0, | |
149 | PORT_ENABLED = 1, | |
150 | PORT_DISABLED = 2, | |
151 | ||
152 | /* encoding various smaller bitmaps into a single | |
153 | * unsigned long bitmap | |
154 | */ | |
155 | ATA_SHIFT_UDMA = 0, | |
156 | ATA_SHIFT_MWDMA = 8, | |
157 | ATA_SHIFT_PIO = 11, | |
cedc9a47 JG |
158 | |
159 | /* size of buffer to pad xfers ending on unaligned boundaries */ | |
160 | ATA_DMA_PAD_SZ = 4, | |
161 | ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE, | |
47a86593 AC |
162 | |
163 | /* Masks for port functions */ | |
164 | ATA_PORT_PRIMARY = (1 << 0), | |
165 | ATA_PORT_SECONDARY = (1 << 1), | |
1da177e4 LT |
166 | }; |
167 | ||
14be71f4 AL |
168 | enum hsm_task_states { |
169 | HSM_ST_UNKNOWN, | |
170 | HSM_ST_IDLE, | |
171 | HSM_ST_POLL, | |
172 | HSM_ST_TMOUT, | |
173 | HSM_ST, | |
174 | HSM_ST_LAST, | |
175 | HSM_ST_LAST_POLL, | |
176 | HSM_ST_ERR, | |
1da177e4 LT |
177 | }; |
178 | ||
179 | /* forward declarations */ | |
180 | struct scsi_device; | |
181 | struct ata_port_operations; | |
182 | struct ata_port; | |
183 | struct ata_queued_cmd; | |
184 | ||
185 | /* typedefs */ | |
186 | typedef int (*ata_qc_cb_t) (struct ata_queued_cmd *qc, u8 drv_stat); | |
187 | ||
188 | struct ata_ioports { | |
189 | unsigned long cmd_addr; | |
190 | unsigned long data_addr; | |
191 | unsigned long error_addr; | |
192 | unsigned long feature_addr; | |
193 | unsigned long nsect_addr; | |
194 | unsigned long lbal_addr; | |
195 | unsigned long lbam_addr; | |
196 | unsigned long lbah_addr; | |
197 | unsigned long device_addr; | |
198 | unsigned long status_addr; | |
199 | unsigned long command_addr; | |
200 | unsigned long altstatus_addr; | |
201 | unsigned long ctl_addr; | |
202 | unsigned long bmdma_addr; | |
203 | unsigned long scr_addr; | |
204 | }; | |
205 | ||
206 | struct ata_probe_ent { | |
207 | struct list_head node; | |
208 | struct device *dev; | |
209 | struct ata_port_operations *port_ops; | |
210 | Scsi_Host_Template *sht; | |
211 | struct ata_ioports port[ATA_MAX_PORTS]; | |
212 | unsigned int n_ports; | |
213 | unsigned int hard_port_no; | |
214 | unsigned int pio_mask; | |
215 | unsigned int mwdma_mask; | |
216 | unsigned int udma_mask; | |
217 | unsigned int legacy_mode; | |
218 | unsigned long irq; | |
219 | unsigned int irq_flags; | |
220 | unsigned long host_flags; | |
221 | void __iomem *mmio_base; | |
222 | void *private_data; | |
223 | }; | |
224 | ||
225 | struct ata_host_set { | |
226 | spinlock_t lock; | |
227 | struct device *dev; | |
228 | unsigned long irq; | |
229 | void __iomem *mmio_base; | |
230 | unsigned int n_ports; | |
231 | void *private_data; | |
232 | struct ata_port_operations *ops; | |
233 | struct ata_port * ports[0]; | |
234 | }; | |
235 | ||
236 | struct ata_queued_cmd { | |
237 | struct ata_port *ap; | |
238 | struct ata_device *dev; | |
239 | ||
240 | struct scsi_cmnd *scsicmd; | |
241 | void (*scsidone)(struct scsi_cmnd *); | |
242 | ||
243 | struct ata_taskfile tf; | |
244 | u8 cdb[ATAPI_CDB_LEN]; | |
245 | ||
246 | unsigned long flags; /* ATA_QCFLAG_xxx */ | |
247 | unsigned int tag; | |
248 | unsigned int n_elem; | |
cedc9a47 | 249 | unsigned int orig_n_elem; |
1da177e4 LT |
250 | |
251 | int dma_dir; | |
252 | ||
cedc9a47 JG |
253 | unsigned int pad_len; |
254 | ||
1da177e4 LT |
255 | unsigned int nsect; |
256 | unsigned int cursect; | |
257 | ||
258 | unsigned int nbytes; | |
259 | unsigned int curbytes; | |
260 | ||
261 | unsigned int cursg; | |
262 | unsigned int cursg_ofs; | |
263 | ||
264 | struct scatterlist sgent; | |
cedc9a47 | 265 | struct scatterlist pad_sgent; |
1da177e4 LT |
266 | void *buf_virt; |
267 | ||
cedc9a47 JG |
268 | /* DO NOT iterate over __sg manually, use ata_for_each_sg() */ |
269 | struct scatterlist *__sg; | |
1da177e4 LT |
270 | |
271 | ata_qc_cb_t complete_fn; | |
272 | ||
273 | struct completion *waiting; | |
274 | ||
275 | void *private_data; | |
276 | }; | |
277 | ||
278 | struct ata_host_stats { | |
279 | unsigned long unhandled_irq; | |
280 | unsigned long idle_irq; | |
281 | unsigned long rw_reqbuf; | |
282 | }; | |
283 | ||
284 | struct ata_device { | |
285 | u64 n_sectors; /* size of device, if ATA */ | |
286 | unsigned long flags; /* ATA_DFLAG_xxx */ | |
287 | unsigned int class; /* ATA_DEV_xxx */ | |
288 | unsigned int devno; /* 0 or 1 */ | |
289 | u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ | |
290 | u8 pio_mode; | |
291 | u8 dma_mode; | |
292 | u8 xfer_mode; | |
293 | unsigned int xfer_shift; /* ATA_SHIFT_xxx */ | |
294 | ||
8cbd6df1 AL |
295 | unsigned int multi_count; /* sectors count for |
296 | READ/WRITE MULTIPLE */ | |
8bf62ece AL |
297 | |
298 | /* for CHS addressing */ | |
299 | u16 cylinders; /* Number of cylinders */ | |
300 | u16 heads; /* Number of heads */ | |
301 | u16 sectors; /* Number of sectors per track */ | |
1da177e4 LT |
302 | }; |
303 | ||
304 | struct ata_port { | |
305 | struct Scsi_Host *host; /* our co-allocated scsi host */ | |
306 | struct ata_port_operations *ops; | |
307 | unsigned long flags; /* ATA_FLAG_xxx */ | |
308 | unsigned int id; /* unique id req'd by scsi midlyr */ | |
309 | unsigned int port_no; /* unique port #; from zero */ | |
310 | unsigned int hard_port_no; /* hardware port #; from zero */ | |
311 | ||
312 | struct ata_prd *prd; /* our SG list */ | |
313 | dma_addr_t prd_dma; /* and its DMA mapping */ | |
314 | ||
cedc9a47 JG |
315 | void *pad; /* array of DMA pad buffers */ |
316 | dma_addr_t pad_dma; | |
317 | ||
1da177e4 LT |
318 | struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ |
319 | ||
320 | u8 ctl; /* cache of ATA control register */ | |
321 | u8 last_ctl; /* Cache last written value */ | |
322 | unsigned int bus_state; | |
323 | unsigned int port_state; | |
324 | unsigned int pio_mask; | |
325 | unsigned int mwdma_mask; | |
326 | unsigned int udma_mask; | |
327 | unsigned int cbl; /* cable type; ATA_CBL_xxx */ | |
328 | unsigned int cdb_len; | |
329 | ||
330 | struct ata_device device[ATA_MAX_DEVICES]; | |
331 | ||
332 | struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; | |
333 | unsigned long qactive; | |
334 | unsigned int active_tag; | |
335 | ||
336 | struct ata_host_stats stats; | |
337 | struct ata_host_set *host_set; | |
338 | ||
339 | struct work_struct packet_task; | |
340 | ||
341 | struct work_struct pio_task; | |
14be71f4 | 342 | unsigned int hsm_task_state; |
1da177e4 LT |
343 | unsigned long pio_task_timeout; |
344 | ||
345 | void *private_data; | |
346 | }; | |
347 | ||
348 | struct ata_port_operations { | |
349 | void (*port_disable) (struct ata_port *); | |
350 | ||
351 | void (*dev_config) (struct ata_port *, struct ata_device *); | |
352 | ||
353 | void (*set_piomode) (struct ata_port *, struct ata_device *); | |
354 | void (*set_dmamode) (struct ata_port *, struct ata_device *); | |
355 | ||
356 | void (*tf_load) (struct ata_port *ap, struct ata_taskfile *tf); | |
357 | void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); | |
358 | ||
359 | void (*exec_command)(struct ata_port *ap, struct ata_taskfile *tf); | |
360 | u8 (*check_status)(struct ata_port *ap); | |
361 | u8 (*check_altstatus)(struct ata_port *ap); | |
362 | u8 (*check_err)(struct ata_port *ap); | |
363 | void (*dev_select)(struct ata_port *ap, unsigned int device); | |
364 | ||
365 | void (*phy_reset) (struct ata_port *ap); | |
366 | void (*post_set_mode) (struct ata_port *ap); | |
367 | ||
368 | int (*check_atapi_dma) (struct ata_queued_cmd *qc); | |
369 | ||
370 | void (*bmdma_setup) (struct ata_queued_cmd *qc); | |
371 | void (*bmdma_start) (struct ata_queued_cmd *qc); | |
372 | ||
373 | void (*qc_prep) (struct ata_queued_cmd *qc); | |
374 | int (*qc_issue) (struct ata_queued_cmd *qc); | |
375 | ||
376 | void (*eng_timeout) (struct ata_port *ap); | |
377 | ||
378 | irqreturn_t (*irq_handler)(int, void *, struct pt_regs *); | |
379 | void (*irq_clear) (struct ata_port *); | |
380 | ||
381 | u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg); | |
382 | void (*scr_write) (struct ata_port *ap, unsigned int sc_reg, | |
383 | u32 val); | |
384 | ||
385 | int (*port_start) (struct ata_port *ap); | |
386 | void (*port_stop) (struct ata_port *ap); | |
387 | ||
388 | void (*host_stop) (struct ata_host_set *host_set); | |
389 | ||
b73fc89f | 390 | void (*bmdma_stop) (struct ata_queued_cmd *qc); |
1da177e4 LT |
391 | u8 (*bmdma_status) (struct ata_port *ap); |
392 | }; | |
393 | ||
394 | struct ata_port_info { | |
395 | Scsi_Host_Template *sht; | |
396 | unsigned long host_flags; | |
397 | unsigned long pio_mask; | |
398 | unsigned long mwdma_mask; | |
399 | unsigned long udma_mask; | |
400 | struct ata_port_operations *port_ops; | |
401 | }; | |
402 | ||
403 | ||
404 | extern void ata_port_probe(struct ata_port *); | |
405 | extern void __sata_phy_reset(struct ata_port *ap); | |
406 | extern void sata_phy_reset(struct ata_port *ap); | |
407 | extern void ata_bus_reset(struct ata_port *ap); | |
408 | extern void ata_port_disable(struct ata_port *); | |
409 | extern void ata_std_ports(struct ata_ioports *ioaddr); | |
410 | #ifdef CONFIG_PCI | |
411 | extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, | |
412 | unsigned int n_ports); | |
413 | extern void ata_pci_remove_one (struct pci_dev *pdev); | |
414 | #endif /* CONFIG_PCI */ | |
415 | extern int ata_device_add(struct ata_probe_ent *ent); | |
17b14451 | 416 | extern void ata_host_set_remove(struct ata_host_set *host_set); |
1da177e4 LT |
417 | extern int ata_scsi_detect(Scsi_Host_Template *sht); |
418 | extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); | |
419 | extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); | |
420 | extern int ata_scsi_error(struct Scsi_Host *host); | |
421 | extern int ata_scsi_release(struct Scsi_Host *host); | |
422 | extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); | |
67846b30 JG |
423 | extern int ata_ratelimit(void); |
424 | ||
1da177e4 LT |
425 | /* |
426 | * Default driver ops implementations | |
427 | */ | |
428 | extern void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf); | |
429 | extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); | |
430 | extern void ata_tf_to_fis(struct ata_taskfile *tf, u8 *fis, u8 pmp); | |
431 | extern void ata_tf_from_fis(u8 *fis, struct ata_taskfile *tf); | |
432 | extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); | |
433 | extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); | |
434 | extern u8 ata_check_status(struct ata_port *ap); | |
435 | extern u8 ata_altstatus(struct ata_port *ap); | |
436 | extern u8 ata_chk_err(struct ata_port *ap); | |
437 | extern void ata_exec_command(struct ata_port *ap, struct ata_taskfile *tf); | |
438 | extern int ata_port_start (struct ata_port *ap); | |
439 | extern void ata_port_stop (struct ata_port *ap); | |
aa8f0dc6 | 440 | extern void ata_host_stop (struct ata_host_set *host_set); |
1da177e4 LT |
441 | extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs); |
442 | extern void ata_qc_prep(struct ata_queued_cmd *qc); | |
443 | extern int ata_qc_issue_prot(struct ata_queued_cmd *qc); | |
444 | extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, | |
445 | unsigned int buflen); | |
446 | extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, | |
447 | unsigned int n_elem); | |
448 | extern unsigned int ata_dev_classify(struct ata_taskfile *tf); | |
449 | extern void ata_dev_id_string(u16 *id, unsigned char *s, | |
450 | unsigned int ofs, unsigned int len); | |
6f2f3812 | 451 | extern void ata_dev_config(struct ata_port *ap, unsigned int i); |
1da177e4 LT |
452 | extern void ata_bmdma_setup (struct ata_queued_cmd *qc); |
453 | extern void ata_bmdma_start (struct ata_queued_cmd *qc); | |
b73fc89f | 454 | extern void ata_bmdma_stop(struct ata_queued_cmd *qc); |
1da177e4 LT |
455 | extern u8 ata_bmdma_status(struct ata_port *ap); |
456 | extern void ata_bmdma_irq_clear(struct ata_port *ap); | |
457 | extern void ata_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat); | |
458 | extern void ata_eng_timeout(struct ata_port *ap); | |
459 | extern void ata_scsi_simulate(u16 *id, struct scsi_cmnd *cmd, | |
460 | void (*done)(struct scsi_cmnd *)); | |
461 | extern int ata_std_bios_param(struct scsi_device *sdev, | |
462 | struct block_device *bdev, | |
463 | sector_t capacity, int geom[]); | |
464 | extern int ata_scsi_slave_config(struct scsi_device *sdev); | |
465 | ||
466 | ||
467 | #ifdef CONFIG_PCI | |
468 | struct pci_bits { | |
469 | unsigned int reg; /* PCI config register to read */ | |
470 | unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ | |
471 | unsigned long mask; | |
472 | unsigned long val; | |
473 | }; | |
474 | ||
374b1873 | 475 | extern void ata_pci_host_stop (struct ata_host_set *host_set); |
1da177e4 | 476 | extern struct ata_probe_ent * |
47a86593 | 477 | ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask); |
1da177e4 LT |
478 | extern int pci_test_config_bits(struct pci_dev *pdev, struct pci_bits *bits); |
479 | ||
480 | #endif /* CONFIG_PCI */ | |
481 | ||
482 | ||
972c26bd JG |
483 | static inline int |
484 | ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc) | |
485 | { | |
486 | if (sg == &qc->pad_sgent) | |
487 | return 1; | |
488 | if (qc->pad_len) | |
489 | return 0; | |
490 | if (((sg - qc->__sg) + 1) == qc->n_elem) | |
491 | return 1; | |
492 | return 0; | |
493 | } | |
494 | ||
cedc9a47 JG |
495 | static inline struct scatterlist * |
496 | ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc) | |
497 | { | |
498 | if (sg == &qc->pad_sgent) | |
499 | return NULL; | |
500 | if (++sg - qc->__sg < qc->n_elem) | |
501 | return sg; | |
502 | return qc->pad_len ? &qc->pad_sgent : NULL; | |
503 | } | |
504 | ||
505 | #define ata_for_each_sg(sg, qc) \ | |
506 | for (sg = qc->__sg; sg; sg = ata_qc_next_sg(sg, qc)) | |
507 | ||
1da177e4 LT |
508 | static inline unsigned int ata_tag_valid(unsigned int tag) |
509 | { | |
510 | return (tag < ATA_MAX_QUEUE) ? 1 : 0; | |
511 | } | |
512 | ||
513 | static inline unsigned int ata_dev_present(struct ata_device *dev) | |
514 | { | |
515 | return ((dev->class == ATA_DEV_ATA) || | |
516 | (dev->class == ATA_DEV_ATAPI)); | |
517 | } | |
518 | ||
519 | static inline u8 ata_chk_status(struct ata_port *ap) | |
520 | { | |
521 | return ap->ops->check_status(ap); | |
522 | } | |
523 | ||
0baab86b EF |
524 | |
525 | /** | |
526 | * ata_pause - Flush writes and pause 400 nanoseconds. | |
527 | * @ap: Port to wait for. | |
528 | * | |
529 | * LOCKING: | |
530 | * Inherited from caller. | |
531 | */ | |
532 | ||
1da177e4 LT |
533 | static inline void ata_pause(struct ata_port *ap) |
534 | { | |
535 | ata_altstatus(ap); | |
536 | ndelay(400); | |
537 | } | |
538 | ||
0baab86b EF |
539 | |
540 | /** | |
541 | * ata_busy_wait - Wait for a port status register | |
542 | * @ap: Port to wait for. | |
543 | * | |
544 | * Waits up to max*10 microseconds for the selected bits in the port's | |
545 | * status register to be cleared. | |
546 | * Returns final value of status register. | |
547 | * | |
548 | * LOCKING: | |
549 | * Inherited from caller. | |
550 | */ | |
551 | ||
1da177e4 LT |
552 | static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, |
553 | unsigned int max) | |
554 | { | |
555 | u8 status; | |
556 | ||
557 | do { | |
558 | udelay(10); | |
559 | status = ata_chk_status(ap); | |
560 | max--; | |
561 | } while ((status & bits) && (max > 0)); | |
562 | ||
563 | return status; | |
564 | } | |
565 | ||
0baab86b EF |
566 | |
567 | /** | |
568 | * ata_wait_idle - Wait for a port to be idle. | |
569 | * @ap: Port to wait for. | |
570 | * | |
571 | * Waits up to 10ms for port's BUSY and DRQ signals to clear. | |
572 | * Returns final value of status register. | |
573 | * | |
574 | * LOCKING: | |
575 | * Inherited from caller. | |
576 | */ | |
577 | ||
1da177e4 LT |
578 | static inline u8 ata_wait_idle(struct ata_port *ap) |
579 | { | |
580 | u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); | |
581 | ||
582 | if (status & (ATA_BUSY | ATA_DRQ)) { | |
583 | unsigned long l = ap->ioaddr.status_addr; | |
584 | printk(KERN_WARNING | |
585 | "ATA: abnormal status 0x%X on port 0x%lX\n", | |
586 | status, l); | |
587 | } | |
588 | ||
589 | return status; | |
590 | } | |
591 | ||
592 | static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) | |
593 | { | |
594 | qc->tf.ctl |= ATA_NIEN; | |
595 | } | |
596 | ||
597 | static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap, | |
598 | unsigned int tag) | |
599 | { | |
600 | if (likely(ata_tag_valid(tag))) | |
601 | return &ap->qcmd[tag]; | |
602 | return NULL; | |
603 | } | |
604 | ||
605 | static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, unsigned int device) | |
606 | { | |
607 | memset(tf, 0, sizeof(*tf)); | |
608 | ||
609 | tf->ctl = ap->ctl; | |
610 | if (device == 0) | |
611 | tf->device = ATA_DEVICE_OBS; | |
612 | else | |
613 | tf->device = ATA_DEVICE_OBS | ATA_DEV1; | |
614 | } | |
615 | ||
0baab86b EF |
616 | |
617 | /** | |
618 | * ata_irq_on - Enable interrupts on a port. | |
619 | * @ap: Port on which interrupts are enabled. | |
620 | * | |
621 | * Enable interrupts on a legacy IDE device using MMIO or PIO, | |
622 | * wait for idle, clear any pending interrupts. | |
623 | * | |
624 | * LOCKING: | |
625 | * Inherited from caller. | |
626 | */ | |
627 | ||
1da177e4 LT |
628 | static inline u8 ata_irq_on(struct ata_port *ap) |
629 | { | |
630 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
631 | u8 tmp; | |
632 | ||
633 | ap->ctl &= ~ATA_NIEN; | |
634 | ap->last_ctl = ap->ctl; | |
635 | ||
636 | if (ap->flags & ATA_FLAG_MMIO) | |
637 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); | |
638 | else | |
639 | outb(ap->ctl, ioaddr->ctl_addr); | |
640 | tmp = ata_wait_idle(ap); | |
641 | ||
642 | ap->ops->irq_clear(ap); | |
643 | ||
644 | return tmp; | |
645 | } | |
646 | ||
0baab86b EF |
647 | |
648 | /** | |
649 | * ata_irq_ack - Acknowledge a device interrupt. | |
650 | * @ap: Port on which interrupts are enabled. | |
651 | * | |
652 | * Wait up to 10 ms for legacy IDE device to become idle (BUSY | |
653 | * or BUSY+DRQ clear). Obtain dma status and port status from | |
654 | * device. Clear the interrupt. Return port status. | |
655 | * | |
656 | * LOCKING: | |
657 | */ | |
658 | ||
1da177e4 LT |
659 | static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq) |
660 | { | |
661 | unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY; | |
662 | u8 host_stat, post_stat, status; | |
663 | ||
664 | status = ata_busy_wait(ap, bits, 1000); | |
665 | if (status & bits) | |
666 | DPRINTK("abnormal status 0x%X\n", status); | |
667 | ||
668 | /* get controller status; clear intr, err bits */ | |
669 | if (ap->flags & ATA_FLAG_MMIO) { | |
670 | void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; | |
671 | host_stat = readb(mmio + ATA_DMA_STATUS); | |
672 | writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, | |
673 | mmio + ATA_DMA_STATUS); | |
674 | ||
675 | post_stat = readb(mmio + ATA_DMA_STATUS); | |
676 | } else { | |
677 | host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); | |
678 | outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, | |
679 | ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); | |
680 | ||
681 | post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); | |
682 | } | |
683 | ||
684 | VPRINTK("irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n", | |
685 | host_stat, post_stat, status); | |
686 | ||
687 | return status; | |
688 | } | |
689 | ||
690 | static inline u32 scr_read(struct ata_port *ap, unsigned int reg) | |
691 | { | |
692 | return ap->ops->scr_read(ap, reg); | |
693 | } | |
694 | ||
695 | static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val) | |
696 | { | |
697 | ap->ops->scr_write(ap, reg, val); | |
698 | } | |
699 | ||
8a60a071 | 700 | static inline void scr_write_flush(struct ata_port *ap, unsigned int reg, |
cdcca89e BR |
701 | u32 val) |
702 | { | |
703 | ap->ops->scr_write(ap, reg, val); | |
704 | (void) ap->ops->scr_read(ap, reg); | |
705 | } | |
706 | ||
1da177e4 LT |
707 | static inline unsigned int sata_dev_present(struct ata_port *ap) |
708 | { | |
709 | return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0; | |
710 | } | |
711 | ||
712 | static inline int ata_try_flush_cache(struct ata_device *dev) | |
713 | { | |
714 | return ata_id_wcache_enabled(dev->id) || | |
715 | ata_id_has_flush(dev->id) || | |
716 | ata_id_has_flush_ext(dev->id); | |
717 | } | |
718 | ||
719 | #endif /* __LINUX_LIBATA_H__ */ |