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IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
[linux-2.6-block.git] / drivers / scsi / aic7xxx / aic79xx_osm.h
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1da177e4
LT		 1/*
2 * Adaptec AIC79xx device driver for Linux.
3 *
4 * Copyright (c) 2000-2001 Adaptec Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions, and the following disclaimer,
12 * without modification.
13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
14 * substantially similar to the "NO WARRANTY" disclaimer below
15 * ("Disclaimer") and any redistribution must be conditioned upon
16 * including a substantially similar Disclaimer requirement for further
17 * binary redistribution.
18 * 3. Neither the names of the above-listed copyright holders nor the names
19 * of any contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * Alternatively, this software may be distributed under the terms of the
23 * GNU General Public License ("GPL") version 2 as published by the Free
24 * Software Foundation.
25 *
26 * NO WARRANTY
27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
31 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
35 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
36 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGES.
38 *
53467e63 39 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.h#166 $
1da177e4
LT		 40 *
41 */
42#ifndef _AIC79XX_LINUX_H_
43#define _AIC79XX_LINUX_H_
44
45#include <linux/types.h>
46#include <linux/blkdev.h>
47#include <linux/delay.h>
48#include <linux/ioport.h>
49#include <linux/pci.h>
50#include <linux/smp_lock.h>
73a25462 51#include <linux/interrupt.h>
1da177e4 52#include <linux/module.h>
73a25462 53#include <linux/slab.h>
1da177e4
LT		 54#include <asm/byteorder.h>
55#include <asm/io.h>
56
73a25462
HR		 57#include <scsi/scsi.h>
58#include <scsi/scsi_cmnd.h>
59#include <scsi/scsi_eh.h>
60#include <scsi/scsi_device.h>
61#include <scsi/scsi_host.h>
62#include <scsi/scsi_tcq.h>
63#include <scsi/scsi_transport.h>
64#include <scsi/scsi_transport_spi.h>
1da177e4
LT		 65
66/* Core SCSI definitions */
67#define AIC_LIB_PREFIX ahd
1da177e4
LT		 68
69/* Name space conflict with BSD queue macros */
70#ifdef LIST_HEAD
71#undef LIST_HEAD
72#endif
73
74#include "cam.h"
75#include "queue.h"
76#include "scsi_message.h"
77#include "scsi_iu.h"
78#include "aiclib.h"
79
80/*********************************** Debugging ********************************/
81#ifdef CONFIG_AIC79XX_DEBUG_ENABLE
82#ifdef CONFIG_AIC79XX_DEBUG_MASK
83#define AHD_DEBUG 1
84#define AHD_DEBUG_OPTS CONFIG_AIC79XX_DEBUG_MASK
85#else
86/*
87 * Compile in debugging code, but do not enable any printfs.
88 */
89#define AHD_DEBUG 1
90#define AHD_DEBUG_OPTS 0
91#endif
92/* No debugging code. */
93#endif
94
95/********************************** Misc Macros *******************************/
1da177e4
LT		 96#define powerof2(x) ((((x)-1)&(x))==0)
97
98/************************* Forward Declarations *******************************/
99struct ahd_softc;
100typedef struct pci_dev *ahd_dev_softc_t;
73a25462 101typedef struct scsi_cmnd *ahd_io_ctx_t;
1da177e4
LT		 102
103/******************************* Byte Order ***********************************/
104#define ahd_htobe16(x) cpu_to_be16(x)
105#define ahd_htobe32(x) cpu_to_be32(x)
106#define ahd_htobe64(x) cpu_to_be64(x)
107#define ahd_htole16(x) cpu_to_le16(x)
108#define ahd_htole32(x) cpu_to_le32(x)
109#define ahd_htole64(x) cpu_to_le64(x)
110
111#define ahd_be16toh(x) be16_to_cpu(x)
112#define ahd_be32toh(x) be32_to_cpu(x)
113#define ahd_be64toh(x) be64_to_cpu(x)
114#define ahd_le16toh(x) le16_to_cpu(x)
115#define ahd_le32toh(x) le32_to_cpu(x)
116#define ahd_le64toh(x) le64_to_cpu(x)
117
1da177e4
LT		 118/************************* Configuration Data *********************************/
119extern uint32_t aic79xx_allow_memio;
73a25462 120extern struct scsi_host_template aic79xx_driver_template;
1da177e4
LT		 121
122/***************************** Bus Space/DMA **********************************/
123
124typedef uint32_t bus_size_t;
125
126typedef enum {
127 BUS_SPACE_MEMIO,
128 BUS_SPACE_PIO
129} bus_space_tag_t;
130
131typedef union {
132 u_long ioport;
133 volatile uint8_t __iomem *maddr;
134} bus_space_handle_t;
135
136typedef struct bus_dma_segment
137{
138 dma_addr_t ds_addr;
139 bus_size_t ds_len;
140} bus_dma_segment_t;
141
142struct ahd_linux_dma_tag
143{
144 bus_size_t alignment;
145 bus_size_t boundary;
146 bus_size_t maxsize;
147};
148typedef struct ahd_linux_dma_tag* bus_dma_tag_t;
149
73a25462 150typedef dma_addr_t bus_dmamap_t;
1da177e4
LT		 151
152typedef int bus_dma_filter_t(void*, dma_addr_t);
153typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int);
154
155#define BUS_DMA_WAITOK 0x0
156#define BUS_DMA_NOWAIT 0x1
157#define BUS_DMA_ALLOCNOW 0x2
158#define BUS_DMA_LOAD_SEGS 0x4 /*
159 * Argument is an S/G list not
160 * a single buffer.
161 */
162
163#define BUS_SPACE_MAXADDR 0xFFFFFFFF
164#define BUS_SPACE_MAXADDR_32BIT 0xFFFFFFFF
165#define BUS_SPACE_MAXSIZE_32BIT 0xFFFFFFFF
166
167int ahd_dma_tag_create(struct ahd_softc *, bus_dma_tag_t /*parent*/,
168 bus_size_t /*alignment*/, bus_size_t /*boundary*/,
169 dma_addr_t /*lowaddr*/, dma_addr_t /*highaddr*/,
170 bus_dma_filter_t*/*filter*/, void */*filterarg*/,
171 bus_size_t /*maxsize*/, int /*nsegments*/,
172 bus_size_t /*maxsegsz*/, int /*flags*/,
173 bus_dma_tag_t */*dma_tagp*/);
174
175void ahd_dma_tag_destroy(struct ahd_softc *, bus_dma_tag_t /*tag*/);
176
177int ahd_dmamem_alloc(struct ahd_softc *, bus_dma_tag_t /*dmat*/,
178 void** /*vaddr*/, int /*flags*/,
179 bus_dmamap_t* /*mapp*/);
180
181void ahd_dmamem_free(struct ahd_softc *, bus_dma_tag_t /*dmat*/,
182 void* /*vaddr*/, bus_dmamap_t /*map*/);
183
184void ahd_dmamap_destroy(struct ahd_softc *, bus_dma_tag_t /*tag*/,
185 bus_dmamap_t /*map*/);
186
187int ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t /*dmat*/,
188 bus_dmamap_t /*map*/, void * /*buf*/,
189 bus_size_t /*buflen*/, bus_dmamap_callback_t *,
190 void */*callback_arg*/, int /*flags*/);
191
192int ahd_dmamap_unload(struct ahd_softc *, bus_dma_tag_t, bus_dmamap_t);
193
194/*
195 * Operations performed by ahd_dmamap_sync().
196 */
197#define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */
198#define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */
199#define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */
200#define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */
201
202/*
203 * XXX
204 * ahd_dmamap_sync is only used on buffers allocated with
205 * the pci_alloc_consistent() API. Although I'm not sure how
206 * this works on architectures with a write buffer, Linux does
207 * not have an API to sync "coherent" memory. Perhaps we need
208 * to do an mb()?
209 */
210#define ahd_dmamap_sync(ahd, dma_tag, dmamap, offset, len, op)
211
212/************************** Timer DataStructures ******************************/
213typedef struct timer_list ahd_timer_t;
214
215/********************************** Includes **********************************/
216#ifdef CONFIG_AIC79XX_REG_PRETTY_PRINT
217#define AIC_DEBUG_REGISTERS 1
218#else
219#define AIC_DEBUG_REGISTERS 0
220#endif
221#include "aic79xx.h"
222
223/***************************** Timer Facilities *******************************/
224#define ahd_timer_init init_timer
225#define ahd_timer_stop del_timer_sync
226typedef void ahd_linux_callback_t (u_long);
73a25462 227static __inline void ahd_timer_reset(ahd_timer_t *timer, int usec,
1da177e4 228 ahd_callback_t *func, void *arg);
1da177e4
LT		 229
230static __inline void
73a25462 231ahd_timer_reset(ahd_timer_t *timer, int usec, ahd_callback_t *func, void *arg)
1da177e4
LT		 232{
233 struct ahd_softc *ahd;
234
235 ahd = (struct ahd_softc *)arg;
236 del_timer(timer);
237 timer->data = (u_long)arg;
238 timer->expires = jiffies + (usec * HZ)/1000000;
239 timer->function = (ahd_linux_callback_t*)func;
240 add_timer(timer);
241}
242
1da177e4
LT		 243/***************************** SMP support ************************************/
244#include <linux/spinlock.h>
245
cd2f1e69 246#define AIC79XX_DRIVER_VERSION "3.0"
1da177e4 247
1da177e4
LT		 248/*************************** Device Data Structures ***************************/
249/*
250 * A per probed device structure used to deal with some error recovery
251 * scenarios that the Linux mid-layer code just doesn't know how to
252 * handle. The structure allocated for a device only becomes persistent
253 * after a successfully completed inquiry command to the target when
254 * that inquiry data indicates a lun is present.
255 */
60a13213 256
1da177e4 257typedef enum {
1da177e4 258 AHD_DEV_FREEZE_TIL_EMPTY = 0x02, /* Freeze queue until active == 0 */
1da177e4
LT		 259 AHD_DEV_Q_BASIC = 0x10, /* Allow basic device queuing */
260 AHD_DEV_Q_TAGGED = 0x20, /* Allow full SCSI2 command queueing */
261 AHD_DEV_PERIODIC_OTAG = 0x40, /* Send OTAG to prevent starvation */
1da177e4
LT		 262} ahd_linux_dev_flags;
263
1da177e4
LT		 264struct ahd_linux_device {
265 TAILQ_ENTRY(ahd_linux_device) links;
1da177e4
LT		 266
267 /*
268 * The number of transactions currently
269 * queued to the device.
270 */
271 int active;
272
273 /*
274 * The currently allowed number of
275 * transactions that can be queued to
276 * the device. Must be signed for
277 * conversion from tagged to untagged
278 * mode where the device may have more
279 * than one outstanding active transaction.
280 */
281 int openings;
282
283 /*
284 * A positive count indicates that this
285 * device's queue is halted.
286 */
287 u_int qfrozen;
288
289 /*
290 * Cumulative command counter.
291 */
292 u_long commands_issued;
293
294 /*
295 * The number of tagged transactions when
296 * running at our current opening level
297 * that have been successfully received by
298 * this device since the last QUEUE FULL.
299 */
300 u_int tag_success_count;
301#define AHD_TAG_SUCCESS_INTERVAL 50
302
303 ahd_linux_dev_flags flags;
304
305 /*
306 * Per device timer.
307 */
308 struct timer_list timer;
309
310 /*
311 * The high limit for the tags variable.
312 */
313 u_int maxtags;
314
315 /*
316 * The computed number of tags outstanding
317 * at the time of the last QUEUE FULL event.
318 */
319 u_int tags_on_last_queuefull;
320
321 /*
322 * How many times we have seen a queue full
323 * with the same number of tags. This is used
324 * to stop our adaptive queue depth algorithm
325 * on devices with a fixed number of tags.
326 */
327 u_int last_queuefull_same_count;
328#define AHD_LOCK_TAGS_COUNT 50
329
330 /*
331 * How many transactions have been queued
332 * without the device going idle. We use
333 * this statistic to determine when to issue
334 * an ordered tag to prevent transaction
335 * starvation. This statistic is only updated
336 * if the AHD_DEV_PERIODIC_OTAG flag is set
337 * on this device.
338 */
339 u_int commands_since_idle_or_otag;
340#define AHD_OTAG_THRESH 500
1da177e4
LT		 341};
342
1da177e4
LT		 343/********************* Definitions Required by the Core ***********************/
344/*
345 * Number of SG segments we require. So long as the S/G segments for
346 * a particular transaction are allocated in a physically contiguous
347 * manner and are allocated below 4GB, the number of S/G segments is
348 * unrestricted.
349 */
1da177e4 350#define AHD_NSEG 128
1da177e4
LT		 351
352/*
353 * Per-SCB OSM storage.
354 */
1da177e4
LT		 355struct scb_platform_data {
356 struct ahd_linux_device *dev;
357 dma_addr_t buf_busaddr;
358 uint32_t xfer_len;
359 uint32_t sense_resid; /* Auto-Sense residual */
1da177e4
LT		 360};
361
362/*
363 * Define a structure used for each host adapter. All members are
364 * aligned on a boundary >= the size of the member to honor the
365 * alignment restrictions of the various platforms supported by
366 * this driver.
367 */
1da177e4
LT		 368struct ahd_platform_data {
369 /*
370 * Fields accessed from interrupt context.
371 */
73a25462 372 struct scsi_target *starget[AHD_NUM_TARGETS];
1da177e4
LT		 373
374 spinlock_t spin_lock;
7b22da38 375 struct completion *eh_done;
1da177e4
LT		 376 struct Scsi_Host *host; /* pointer to scsi host */
377#define AHD_LINUX_NOIRQ ((uint32_t)~0)
378 uint32_t irq; /* IRQ for this adapter */
379 uint32_t bios_address;
380 uint32_t mem_busaddr; /* Mem Base Addr */
1da177e4
LT		 381};
382
383/************************** OS Utility Wrappers *******************************/
384#define printf printk
385#define M_NOWAIT GFP_ATOMIC
386#define M_WAITOK 0
387#define malloc(size, type, flags) kmalloc(size, flags)
388#define free(ptr, type) kfree(ptr)
389
390static __inline void ahd_delay(long);
391static __inline void
392ahd_delay(long usec)
393{
394 /*
395 * udelay on Linux can have problems for
396 * multi-millisecond waits. Wait at most
397 * 1024us per call.
398 */
399 while (usec > 0) {
400 udelay(usec % 1024);
401 usec -= 1024;
402 }
403}
404
405
406/***************************** Low Level I/O **********************************/
407static __inline uint8_t ahd_inb(struct ahd_softc * ahd, long port);
408static __inline uint16_t ahd_inw_atomic(struct ahd_softc * ahd, long port);
409static __inline void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);
410static __inline void ahd_outw_atomic(struct ahd_softc * ahd,
411 long port, uint16_t val);
412static __inline void ahd_outsb(struct ahd_softc * ahd, long port,
413 uint8_t *, int count);
414static __inline void ahd_insb(struct ahd_softc * ahd, long port,
415 uint8_t *, int count);
416
417static __inline uint8_t
418ahd_inb(struct ahd_softc * ahd, long port)
419{
420 uint8_t x;
421
422 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
423 x = readb(ahd->bshs[0].maddr + port);
424 } else {
425 x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
426 }
427 mb();
428 return (x);
429}
430
431static __inline uint16_t
432ahd_inw_atomic(struct ahd_softc * ahd, long port)
433{
434 uint8_t x;
435
436 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
437 x = readw(ahd->bshs[0].maddr + port);
438 } else {
439 x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
440 }
441 mb();
442 return (x);
443}
444
445static __inline void
446ahd_outb(struct ahd_softc * ahd, long port, uint8_t val)
447{
448 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
449 writeb(val, ahd->bshs[0].maddr + port);
450 } else {
451 outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
452 }
453 mb();
454}
455
456static __inline void
457ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val)
458{
459 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
460 writew(val, ahd->bshs[0].maddr + port);
461 } else {
462 outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
463 }
464 mb();
465}
466
467static __inline void
468ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
469{
470 int i;
471
472 /*
473 * There is probably a more efficient way to do this on Linux
474 * but we don't use this for anything speed critical and this
475 * should work.
476 */
477 for (i = 0; i < count; i++)
478 ahd_outb(ahd, port, *array++);
479}
480
481static __inline void
482ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
483{
484 int i;
485
486 /*
487 * There is probably a more efficient way to do this on Linux
488 * but we don't use this for anything speed critical and this
489 * should work.
490 */
491 for (i = 0; i < count; i++)
492 *array++ = ahd_inb(ahd, port);
493}
494
495/**************************** Initialization **********************************/
496int ahd_linux_register_host(struct ahd_softc *,
73a25462 497 struct scsi_host_template *);
1da177e4
LT		 498
499uint64_t ahd_linux_get_memsize(void);
500
501/*************************** Pretty Printing **********************************/
502struct info_str {
503 char *buffer;
504 int length;
505 off_t offset;
506 int pos;
507};
508
509void ahd_format_transinfo(struct info_str *info,
510 struct ahd_transinfo *tinfo);
511
512/******************************** Locking *************************************/
1da177e4
LT		 513static __inline void
514ahd_lockinit(struct ahd_softc *ahd)
515{
516 spin_lock_init(&ahd->platform_data->spin_lock);
517}
518
519static __inline void
520ahd_lock(struct ahd_softc *ahd, unsigned long *flags)
521{
522 spin_lock_irqsave(&ahd->platform_data->spin_lock, *flags);
523}
524
525static __inline void
526ahd_unlock(struct ahd_softc *ahd, unsigned long *flags)
527{
528 spin_unlock_irqrestore(&ahd->platform_data->spin_lock, *flags);
529}
530
1da177e4
LT		 531/******************************* PCI Definitions ******************************/
532/*
533 * PCIM_xxx: mask to locate subfield in register
534 * PCIR_xxx: config register offset
535 * PCIC_xxx: device class
536 * PCIS_xxx: device subclass
537 * PCIP_xxx: device programming interface
538 * PCIV_xxx: PCI vendor ID (only required to fixup ancient devices)
539 * PCID_xxx: device ID
540 */
541#define PCIR_DEVVENDOR 0x00
542#define PCIR_VENDOR 0x00
543#define PCIR_DEVICE 0x02
544#define PCIR_COMMAND 0x04
545#define PCIM_CMD_PORTEN 0x0001
546#define PCIM_CMD_MEMEN 0x0002
547#define PCIM_CMD_BUSMASTEREN 0x0004
548#define PCIM_CMD_MWRICEN 0x0010
549#define PCIM_CMD_PERRESPEN 0x0040
550#define PCIM_CMD_SERRESPEN 0x0100
551#define PCIR_STATUS 0x06
552#define PCIR_REVID 0x08
553#define PCIR_PROGIF 0x09
554#define PCIR_SUBCLASS 0x0a
555#define PCIR_CLASS 0x0b
556#define PCIR_CACHELNSZ 0x0c
557#define PCIR_LATTIMER 0x0d
558#define PCIR_HEADERTYPE 0x0e
559#define PCIM_MFDEV 0x80
560#define PCIR_BIST 0x0f
561#define PCIR_CAP_PTR 0x34
562
563/* config registers for header type 0 devices */
564#define PCIR_MAPS 0x10
565#define PCIR_SUBVEND_0 0x2c
566#define PCIR_SUBDEV_0 0x2e
567
568/****************************** PCI-X definitions *****************************/
569#define PCIXR_COMMAND 0x96
570#define PCIXR_DEVADDR 0x98
571#define PCIXM_DEVADDR_FNUM 0x0003 /* Function Number */
572#define PCIXM_DEVADDR_DNUM 0x00F8 /* Device Number */
573#define PCIXM_DEVADDR_BNUM 0xFF00 /* Bus Number */
574#define PCIXR_STATUS 0x9A
575#define PCIXM_STATUS_64BIT 0x0001 /* Active 64bit connection to device. */
576#define PCIXM_STATUS_133CAP 0x0002 /* Device is 133MHz capable */
577#define PCIXM_STATUS_SCDISC 0x0004 /* Split Completion Discarded */
578#define PCIXM_STATUS_UNEXPSC 0x0008 /* Unexpected Split Completion */
579#define PCIXM_STATUS_CMPLEXDEV 0x0010 /* Device Complexity (set == bridge) */
580#define PCIXM_STATUS_MAXMRDBC 0x0060 /* Maximum Burst Read Count */
581#define PCIXM_STATUS_MAXSPLITS 0x0380 /* Maximum Split Transactions */
582#define PCIXM_STATUS_MAXCRDS 0x1C00 /* Maximum Cumulative Read Size */
583#define PCIXM_STATUS_RCVDSCEM 0x2000 /* Received a Split Comp w/Error msg */
584
585extern struct pci_driver aic79xx_pci_driver;
586
587typedef enum
588{
589 AHD_POWER_STATE_D0,
590 AHD_POWER_STATE_D1,
591 AHD_POWER_STATE_D2,
592 AHD_POWER_STATE_D3
593} ahd_power_state;
594
595void ahd_power_state_change(struct ahd_softc *ahd,
596 ahd_power_state new_state);
597
598/******************************* PCI Routines *********************************/
599int ahd_linux_pci_init(void);
600void ahd_linux_pci_exit(void);
601int ahd_pci_map_registers(struct ahd_softc *ahd);
602int ahd_pci_map_int(struct ahd_softc *ahd);
603
604static __inline uint32_t ahd_pci_read_config(ahd_dev_softc_t pci,
605 int reg, int width);
606
607static __inline uint32_t
608ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width)
609{
610 switch (width) {
611 case 1:
612 {
613 uint8_t retval;
614
615 pci_read_config_byte(pci, reg, &retval);
616 return (retval);
617 }
618 case 2:
619 {
620 uint16_t retval;
621 pci_read_config_word(pci, reg, &retval);
622 return (retval);
623 }
624 case 4:
625 {
626 uint32_t retval;
627 pci_read_config_dword(pci, reg, &retval);
628 return (retval);
629 }
630 default:
631 panic("ahd_pci_read_config: Read size too big");
632 /* NOTREACHED */
633 return (0);
634 }
635}
636
637static __inline void ahd_pci_write_config(ahd_dev_softc_t pci,
638 int reg, uint32_t value,
639 int width);
640
641static __inline void
642ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width)
643{
644 switch (width) {
645 case 1:
646 pci_write_config_byte(pci, reg, value);
647 break;
648 case 2:
649 pci_write_config_word(pci, reg, value);
650 break;
651 case 4:
652 pci_write_config_dword(pci, reg, value);
653 break;
654 default:
655 panic("ahd_pci_write_config: Write size too big");
656 /* NOTREACHED */
657 }
658}
659
660static __inline int ahd_get_pci_function(ahd_dev_softc_t);
661static __inline int
662ahd_get_pci_function(ahd_dev_softc_t pci)
663{
664 return (PCI_FUNC(pci->devfn));
665}
666
667static __inline int ahd_get_pci_slot(ahd_dev_softc_t);
668static __inline int
669ahd_get_pci_slot(ahd_dev_softc_t pci)
670{
671 return (PCI_SLOT(pci->devfn));
672}
673
674static __inline int ahd_get_pci_bus(ahd_dev_softc_t);
675static __inline int
676ahd_get_pci_bus(ahd_dev_softc_t pci)
677{
678 return (pci->bus->number);
679}
680
681static __inline void ahd_flush_device_writes(struct ahd_softc *);
682static __inline void
683ahd_flush_device_writes(struct ahd_softc *ahd)
684{
685 /* XXX Is this sufficient for all architectures??? */
686 ahd_inb(ahd, INTSTAT);
687}
688
689/**************************** Proc FS Support *********************************/
1da177e4
LT		 690int ahd_linux_proc_info(struct Scsi_Host *, char *, char **,
691 off_t, int, int);
1da177e4 692
1da177e4 693/*********************** Transaction Access Wrappers **************************/
73a25462 694static __inline void ahd_cmd_set_transaction_status(struct scsi_cmnd *, uint32_t);
1da177e4 695static __inline void ahd_set_transaction_status(struct scb *, uint32_t);
73a25462 696static __inline void ahd_cmd_set_scsi_status(struct scsi_cmnd *, uint32_t);
1da177e4 697static __inline void ahd_set_scsi_status(struct scb *, uint32_t);
73a25462 698static __inline uint32_t ahd_cmd_get_transaction_status(struct scsi_cmnd *cmd);
1da177e4 699static __inline uint32_t ahd_get_transaction_status(struct scb *);
73a25462 700static __inline uint32_t ahd_cmd_get_scsi_status(struct scsi_cmnd *cmd);
1da177e4
LT		 701static __inline uint32_t ahd_get_scsi_status(struct scb *);
702static __inline void ahd_set_transaction_tag(struct scb *, int, u_int);
703static __inline u_long ahd_get_transfer_length(struct scb *);
704static __inline int ahd_get_transfer_dir(struct scb *);
705static __inline void ahd_set_residual(struct scb *, u_long);
706static __inline void ahd_set_sense_residual(struct scb *scb, u_long resid);
707static __inline u_long ahd_get_residual(struct scb *);
708static __inline u_long ahd_get_sense_residual(struct scb *);
709static __inline int ahd_perform_autosense(struct scb *);
710static __inline uint32_t ahd_get_sense_bufsize(struct ahd_softc *,
711 struct scb *);
712static __inline void ahd_notify_xfer_settings_change(struct ahd_softc *,
713 struct ahd_devinfo *);
714static __inline void ahd_platform_scb_free(struct ahd_softc *ahd,
715 struct scb *scb);
716static __inline void ahd_freeze_scb(struct scb *scb);
717
718static __inline
73a25462 719void ahd_cmd_set_transaction_status(struct scsi_cmnd *cmd, uint32_t status)
1da177e4
LT		 720{
721 cmd->result &= ~(CAM_STATUS_MASK << 16);
722 cmd->result |= status << 16;
723}
724
725static __inline
726void ahd_set_transaction_status(struct scb *scb, uint32_t status)
727{
728 ahd_cmd_set_transaction_status(scb->io_ctx,status);
729}
730
731static __inline
73a25462 732void ahd_cmd_set_scsi_status(struct scsi_cmnd *cmd, uint32_t status)
1da177e4
LT		 733{
734 cmd->result &= ~0xFFFF;
735 cmd->result |= status;
736}
737
738static __inline
739void ahd_set_scsi_status(struct scb *scb, uint32_t status)
740{
741 ahd_cmd_set_scsi_status(scb->io_ctx, status);
742}
743
744static __inline
73a25462 745uint32_t ahd_cmd_get_transaction_status(struct scsi_cmnd *cmd)
1da177e4
LT		 746{
747 return ((cmd->result >> 16) & CAM_STATUS_MASK);
748}
749
750static __inline
751uint32_t ahd_get_transaction_status(struct scb *scb)
752{
753 return (ahd_cmd_get_transaction_status(scb->io_ctx));
754}
755
756static __inline
73a25462 757uint32_t ahd_cmd_get_scsi_status(struct scsi_cmnd *cmd)
1da177e4
LT		 758{
759 return (cmd->result & 0xFFFF);
760}
761
762static __inline
763uint32_t ahd_get_scsi_status(struct scb *scb)
764{
765 return (ahd_cmd_get_scsi_status(scb->io_ctx));
766}
767
768static __inline
769void ahd_set_transaction_tag(struct scb *scb, int enabled, u_int type)
770{
771 /*
772 * Nothing to do for linux as the incoming transaction
773 * has no concept of tag/non tagged, etc.
774 */
775}
776
777static __inline
778u_long ahd_get_transfer_length(struct scb *scb)
779{
780 return (scb->platform_data->xfer_len);
781}
782
783static __inline
784int ahd_get_transfer_dir(struct scb *scb)
785{
786 return (scb->io_ctx->sc_data_direction);
787}
788
789static __inline
790void ahd_set_residual(struct scb *scb, u_long resid)
791{
792 scb->io_ctx->resid = resid;
793}
794
795static __inline
796void ahd_set_sense_residual(struct scb *scb, u_long resid)
797{
798 scb->platform_data->sense_resid = resid;
799}
800
801static __inline
802u_long ahd_get_residual(struct scb *scb)
803{
804 return (scb->io_ctx->resid);
805}
806
807static __inline
808u_long ahd_get_sense_residual(struct scb *scb)
809{
810 return (scb->platform_data->sense_resid);
811}
812
813static __inline
814int ahd_perform_autosense(struct scb *scb)
815{
816 /*
817 * We always perform autosense in Linux.
818 * On other platforms this is set on a
819 * per-transaction basis.
820 */
821 return (1);
822}
823
824static __inline uint32_t
825ahd_get_sense_bufsize(struct ahd_softc *ahd, struct scb *scb)
826{
827 return (sizeof(struct scsi_sense_data));
828}
829
830static __inline void
831ahd_notify_xfer_settings_change(struct ahd_softc *ahd,
832 struct ahd_devinfo *devinfo)
833{
834 /* Nothing to do here for linux */
835}
836
837static __inline void
838ahd_platform_scb_free(struct ahd_softc *ahd, struct scb *scb)
839{
840 ahd->flags &= ~AHD_RESOURCE_SHORTAGE;
841}
842
843int ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg);
844void ahd_platform_free(struct ahd_softc *ahd);
845void ahd_platform_init(struct ahd_softc *ahd);
846void ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb);
847void ahd_freeze_simq(struct ahd_softc *ahd);
848void ahd_release_simq(struct ahd_softc *ahd);
849
850static __inline void
851ahd_freeze_scb(struct scb *scb)
852{
853 if ((scb->io_ctx->result & (CAM_DEV_QFRZN << 16)) == 0) {
854 scb->io_ctx->result |= CAM_DEV_QFRZN << 16;
855 scb->platform_data->dev->qfrozen++;
856 }
857}
858
f89d0a4e 859void ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1da177e4
LT		 860 struct ahd_devinfo *devinfo, ahd_queue_alg);
861int ahd_platform_abort_scbs(struct ahd_softc *ahd, int target,
862 char channel, int lun, u_int tag,
863 role_t role, uint32_t status);
864irqreturn_t
7d12e780 865 ahd_linux_isr(int irq, void *dev_id);
1da177e4
LT		 866void ahd_done(struct ahd_softc*, struct scb*);
867void ahd_send_async(struct ahd_softc *, char channel,
f89d0a4e 868 u_int target, u_int lun, ac_code);
1da177e4 869void ahd_print_path(struct ahd_softc *, struct scb *);
1da177e4
LT		 870
871#ifdef CONFIG_PCI
872#define AHD_PCI_CONFIG 1
873#else
874#define AHD_PCI_CONFIG 0
875#endif
876#define bootverbose aic79xx_verbose
877extern uint32_t aic79xx_verbose;
878
879#endif /* _AIC79XX_LINUX_H_ */
Linux 6.x block layer and io_uring tree(s)