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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 *
39 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.h#137 $
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>
51#include <linux/version.h>
52#include <linux/module.h>
53#include <asm/byteorder.h>
54#include <asm/io.h>
55
56#include <linux/interrupt.h> /* For tasklet support. */
57#include <linux/config.h>
58#include <linux/slab.h>
59
60/* Core SCSI definitions */
61#define AIC_LIB_PREFIX ahd
62#include "scsi.h"
63#include <scsi/scsi_host.h>
64
65/* Name space conflict with BSD queue macros */
66#ifdef LIST_HEAD
67#undef LIST_HEAD
68#endif
69
70#include "cam.h"
71#include "queue.h"
72#include "scsi_message.h"
73#include "scsi_iu.h"
74#include "aiclib.h"
75
76/*********************************** Debugging ********************************/
77#ifdef CONFIG_AIC79XX_DEBUG_ENABLE
78#ifdef CONFIG_AIC79XX_DEBUG_MASK
79#define AHD_DEBUG 1
80#define AHD_DEBUG_OPTS CONFIG_AIC79XX_DEBUG_MASK
81#else
82/*
83 * Compile in debugging code, but do not enable any printfs.
84 */
85#define AHD_DEBUG 1
86#define AHD_DEBUG_OPTS 0
87#endif
88/* No debugging code. */
89#endif
90
91/********************************** Misc Macros *******************************/
92#define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
93#define powerof2(x) ((((x)-1)&(x))==0)
94
95/************************* Forward Declarations *******************************/
96struct ahd_softc;
97typedef struct pci_dev *ahd_dev_softc_t;
98typedef Scsi_Cmnd *ahd_io_ctx_t;
99
100/******************************* Byte Order ***********************************/
101#define ahd_htobe16(x) cpu_to_be16(x)
102#define ahd_htobe32(x) cpu_to_be32(x)
103#define ahd_htobe64(x) cpu_to_be64(x)
104#define ahd_htole16(x) cpu_to_le16(x)
105#define ahd_htole32(x) cpu_to_le32(x)
106#define ahd_htole64(x) cpu_to_le64(x)
107
108#define ahd_be16toh(x) be16_to_cpu(x)
109#define ahd_be32toh(x) be32_to_cpu(x)
110#define ahd_be64toh(x) be64_to_cpu(x)
111#define ahd_le16toh(x) le16_to_cpu(x)
112#define ahd_le32toh(x) le32_to_cpu(x)
113#define ahd_le64toh(x) le64_to_cpu(x)
114
115#ifndef LITTLE_ENDIAN
116#define LITTLE_ENDIAN 1234
117#endif
118
119#ifndef BIG_ENDIAN
120#define BIG_ENDIAN 4321
121#endif
122
123#ifndef BYTE_ORDER
124#if defined(__BIG_ENDIAN)
125#define BYTE_ORDER BIG_ENDIAN
126#endif
127#if defined(__LITTLE_ENDIAN)
128#define BYTE_ORDER LITTLE_ENDIAN
129#endif
130#endif /* BYTE_ORDER */
131
132/************************* Configuration Data *********************************/
133extern uint32_t aic79xx_allow_memio;
134extern int aic79xx_detect_complete;
135extern Scsi_Host_Template aic79xx_driver_template;
136
137/***************************** Bus Space/DMA **********************************/
138
139typedef uint32_t bus_size_t;
140
141typedef enum {
142 BUS_SPACE_MEMIO,
143 BUS_SPACE_PIO
144} bus_space_tag_t;
145
146typedef union {
147 u_long ioport;
148 volatile uint8_t __iomem *maddr;
149} bus_space_handle_t;
150
151typedef struct bus_dma_segment
152{
153 dma_addr_t ds_addr;
154 bus_size_t ds_len;
155} bus_dma_segment_t;
156
157struct ahd_linux_dma_tag
158{
159 bus_size_t alignment;
160 bus_size_t boundary;
161 bus_size_t maxsize;
162};
163typedef struct ahd_linux_dma_tag* bus_dma_tag_t;
164
165struct ahd_linux_dmamap
166{
167 dma_addr_t bus_addr;
168};
169typedef struct ahd_linux_dmamap* bus_dmamap_t;
170
171typedef int bus_dma_filter_t(void*, dma_addr_t);
172typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int);
173
174#define BUS_DMA_WAITOK 0x0
175#define BUS_DMA_NOWAIT 0x1
176#define BUS_DMA_ALLOCNOW 0x2
177#define BUS_DMA_LOAD_SEGS 0x4 /*
178 * Argument is an S/G list not
179 * a single buffer.
180 */
181
182#define BUS_SPACE_MAXADDR 0xFFFFFFFF
183#define BUS_SPACE_MAXADDR_32BIT 0xFFFFFFFF
184#define BUS_SPACE_MAXSIZE_32BIT 0xFFFFFFFF
185
186int ahd_dma_tag_create(struct ahd_softc *, bus_dma_tag_t /*parent*/,
187 bus_size_t /*alignment*/, bus_size_t /*boundary*/,
188 dma_addr_t /*lowaddr*/, dma_addr_t /*highaddr*/,
189 bus_dma_filter_t*/*filter*/, void */*filterarg*/,
190 bus_size_t /*maxsize*/, int /*nsegments*/,
191 bus_size_t /*maxsegsz*/, int /*flags*/,
192 bus_dma_tag_t */*dma_tagp*/);
193
194void ahd_dma_tag_destroy(struct ahd_softc *, bus_dma_tag_t /*tag*/);
195
196int ahd_dmamem_alloc(struct ahd_softc *, bus_dma_tag_t /*dmat*/,
197 void** /*vaddr*/, int /*flags*/,
198 bus_dmamap_t* /*mapp*/);
199
200void ahd_dmamem_free(struct ahd_softc *, bus_dma_tag_t /*dmat*/,
201 void* /*vaddr*/, bus_dmamap_t /*map*/);
202
203void ahd_dmamap_destroy(struct ahd_softc *, bus_dma_tag_t /*tag*/,
204 bus_dmamap_t /*map*/);
205
206int ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t /*dmat*/,
207 bus_dmamap_t /*map*/, void * /*buf*/,
208 bus_size_t /*buflen*/, bus_dmamap_callback_t *,
209 void */*callback_arg*/, int /*flags*/);
210
211int ahd_dmamap_unload(struct ahd_softc *, bus_dma_tag_t, bus_dmamap_t);
212
213/*
214 * Operations performed by ahd_dmamap_sync().
215 */
216#define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */
217#define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */
218#define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */
219#define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */
220
221/*
222 * XXX
223 * ahd_dmamap_sync is only used on buffers allocated with
224 * the pci_alloc_consistent() API. Although I'm not sure how
225 * this works on architectures with a write buffer, Linux does
226 * not have an API to sync "coherent" memory. Perhaps we need
227 * to do an mb()?
228 */
229#define ahd_dmamap_sync(ahd, dma_tag, dmamap, offset, len, op)
230
231/************************** Timer DataStructures ******************************/
232typedef struct timer_list ahd_timer_t;
233
234/********************************** Includes **********************************/
235#ifdef CONFIG_AIC79XX_REG_PRETTY_PRINT
236#define AIC_DEBUG_REGISTERS 1
237#else
238#define AIC_DEBUG_REGISTERS 0
239#endif
240#include "aic79xx.h"
241
242/***************************** Timer Facilities *******************************/
243#define ahd_timer_init init_timer
244#define ahd_timer_stop del_timer_sync
245typedef void ahd_linux_callback_t (u_long);
246static __inline void ahd_timer_reset(ahd_timer_t *timer, u_int usec,
247 ahd_callback_t *func, void *arg);
248static __inline void ahd_scb_timer_reset(struct scb *scb, u_int usec);
249
250static __inline void
251ahd_timer_reset(ahd_timer_t *timer, u_int usec, ahd_callback_t *func, void *arg)
252{
253 struct ahd_softc *ahd;
254
255 ahd = (struct ahd_softc *)arg;
256 del_timer(timer);
257 timer->data = (u_long)arg;
258 timer->expires = jiffies + (usec * HZ)/1000000;
259 timer->function = (ahd_linux_callback_t*)func;
260 add_timer(timer);
261}
262
263static __inline void
264ahd_scb_timer_reset(struct scb *scb, u_int usec)
265{
266 mod_timer(&scb->io_ctx->eh_timeout, jiffies + (usec * HZ)/1000000);
267}
268
269/***************************** SMP support ************************************/
270#include <linux/spinlock.h>
271
272#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) || defined(SCSI_HAS_HOST_LOCK))
273#define AHD_SCSI_HAS_HOST_LOCK 1
274#else
275#define AHD_SCSI_HAS_HOST_LOCK 0
276#endif
277
278#define AIC79XX_DRIVER_VERSION "1.3.11"
279
280/**************************** Front End Queues ********************************/
281/*
282 * Data structure used to cast the Linux struct scsi_cmnd to something
283 * that allows us to use the queue macros. The linux structure has
284 * plenty of space to hold the links fields as required by the queue
285 * macros, but the queue macors require them to have the correct type.
286 */
287struct ahd_cmd_internal {
288 /* Area owned by the Linux scsi layer. */
289 uint8_t private[offsetof(struct scsi_cmnd, SCp.Status)];
290 union {
291 STAILQ_ENTRY(ahd_cmd) ste;
292 LIST_ENTRY(ahd_cmd) le;
293 TAILQ_ENTRY(ahd_cmd) tqe;
294 } links;
295 uint32_t end;
296};
297
298struct ahd_cmd {
299 union {
300 struct ahd_cmd_internal icmd;
301 struct scsi_cmnd scsi_cmd;
302 } un;
303};
304
305#define acmd_icmd(cmd) ((cmd)->un.icmd)
306#define acmd_scsi_cmd(cmd) ((cmd)->un.scsi_cmd)
307#define acmd_links un.icmd.links
308
309/*************************** Device Data Structures ***************************/
310/*
311 * A per probed device structure used to deal with some error recovery
312 * scenarios that the Linux mid-layer code just doesn't know how to
313 * handle. The structure allocated for a device only becomes persistent
314 * after a successfully completed inquiry command to the target when
315 * that inquiry data indicates a lun is present.
316 */
317TAILQ_HEAD(ahd_busyq, ahd_cmd);
318typedef enum {
319 AHD_DEV_UNCONFIGURED = 0x01,
320 AHD_DEV_FREEZE_TIL_EMPTY = 0x02, /* Freeze queue until active == 0 */
321 AHD_DEV_TIMER_ACTIVE = 0x04, /* Our timer is active */
322 AHD_DEV_ON_RUN_LIST = 0x08, /* Queued to be run later */
323 AHD_DEV_Q_BASIC = 0x10, /* Allow basic device queuing */
324 AHD_DEV_Q_TAGGED = 0x20, /* Allow full SCSI2 command queueing */
325 AHD_DEV_PERIODIC_OTAG = 0x40, /* Send OTAG to prevent starvation */
326 AHD_DEV_SLAVE_CONFIGURED = 0x80 /* slave_configure() has been called */
327} ahd_linux_dev_flags;
328
329struct ahd_linux_target;
330struct ahd_linux_device {
331 TAILQ_ENTRY(ahd_linux_device) links;
332 struct ahd_busyq busyq;
333
334 /*
335 * The number of transactions currently
336 * queued to the device.
337 */
338 int active;
339
340 /*
341 * The currently allowed number of
342 * transactions that can be queued to
343 * the device. Must be signed for
344 * conversion from tagged to untagged
345 * mode where the device may have more
346 * than one outstanding active transaction.
347 */
348 int openings;
349
350 /*
351 * A positive count indicates that this
352 * device's queue is halted.
353 */
354 u_int qfrozen;
355
356 /*
357 * Cumulative command counter.
358 */
359 u_long commands_issued;
360
361 /*
362 * The number of tagged transactions when
363 * running at our current opening level
364 * that have been successfully received by
365 * this device since the last QUEUE FULL.
366 */
367 u_int tag_success_count;
368#define AHD_TAG_SUCCESS_INTERVAL 50
369
370 ahd_linux_dev_flags flags;
371
372 /*
373 * Per device timer.
374 */
375 struct timer_list timer;
376
377 /*
378 * The high limit for the tags variable.
379 */
380 u_int maxtags;
381
382 /*
383 * The computed number of tags outstanding
384 * at the time of the last QUEUE FULL event.
385 */
386 u_int tags_on_last_queuefull;
387
388 /*
389 * How many times we have seen a queue full
390 * with the same number of tags. This is used
391 * to stop our adaptive queue depth algorithm
392 * on devices with a fixed number of tags.
393 */
394 u_int last_queuefull_same_count;
395#define AHD_LOCK_TAGS_COUNT 50
396
397 /*
398 * How many transactions have been queued
399 * without the device going idle. We use
400 * this statistic to determine when to issue
401 * an ordered tag to prevent transaction
402 * starvation. This statistic is only updated
403 * if the AHD_DEV_PERIODIC_OTAG flag is set
404 * on this device.
405 */
406 u_int commands_since_idle_or_otag;
407#define AHD_OTAG_THRESH 500
408
409 int lun;
410 Scsi_Device *scsi_device;
411 struct ahd_linux_target *target;
412};
413
414typedef enum {
415 AHD_DV_REQUIRED = 0x01,
416 AHD_INQ_VALID = 0x02,
417 AHD_BASIC_DV = 0x04,
418 AHD_ENHANCED_DV = 0x08
419} ahd_linux_targ_flags;
420
421/* DV States */
422typedef enum {
423 AHD_DV_STATE_EXIT = 0,
424 AHD_DV_STATE_INQ_SHORT_ASYNC,
425 AHD_DV_STATE_INQ_ASYNC,
426 AHD_DV_STATE_INQ_ASYNC_VERIFY,
427 AHD_DV_STATE_TUR,
428 AHD_DV_STATE_REBD,
429 AHD_DV_STATE_INQ_VERIFY,
430 AHD_DV_STATE_WEB,
431 AHD_DV_STATE_REB,
432 AHD_DV_STATE_SU,
433 AHD_DV_STATE_BUSY
434} ahd_dv_state;
435
436struct ahd_linux_target {
437 struct ahd_linux_device *devices[AHD_NUM_LUNS];
438 int channel;
439 int target;
440 int refcount;
441 struct ahd_transinfo last_tinfo;
442 struct ahd_softc *ahd;
443 ahd_linux_targ_flags flags;
444 struct scsi_inquiry_data *inq_data;
445 /*
446 * The next "fallback" period to use for narrow/wide transfers.
447 */
448 uint8_t dv_next_narrow_period;
449 uint8_t dv_next_wide_period;
450 uint8_t dv_max_width;
451 uint8_t dv_max_ppr_options;
452 uint8_t dv_last_ppr_options;
453 u_int dv_echo_size;
454 ahd_dv_state dv_state;
455 u_int dv_state_retry;
456 uint8_t *dv_buffer;
457 uint8_t *dv_buffer1;
458
459 /*
460 * Cumulative counter of errors.
461 */
462 u_long errors_detected;
463 u_long cmds_since_error;
464};
465
466/********************* Definitions Required by the Core ***********************/
467/*
468 * Number of SG segments we require. So long as the S/G segments for
469 * a particular transaction are allocated in a physically contiguous
470 * manner and are allocated below 4GB, the number of S/G segments is
471 * unrestricted.
472 */
473#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
474/*
475 * We dynamically adjust the number of segments in pre-2.5 kernels to
476 * avoid fragmentation issues in the SCSI mid-layer's private memory
477 * allocator. See aic79xx_osm.c ahd_linux_size_nseg() for details.
478 */
479extern u_int ahd_linux_nseg;
480#define AHD_NSEG ahd_linux_nseg
481#define AHD_LINUX_MIN_NSEG 64
482#else
483#define AHD_NSEG 128
484#endif
485
486/*
487 * Per-SCB OSM storage.
488 */
489typedef enum {
490 AHD_SCB_UP_EH_SEM = 0x1
491} ahd_linux_scb_flags;
492
493struct scb_platform_data {
494 struct ahd_linux_device *dev;
495 dma_addr_t buf_busaddr;
496 uint32_t xfer_len;
497 uint32_t sense_resid; /* Auto-Sense residual */
498 ahd_linux_scb_flags flags;
499};
500
501/*
502 * Define a structure used for each host adapter. All members are
503 * aligned on a boundary >= the size of the member to honor the
504 * alignment restrictions of the various platforms supported by
505 * this driver.
506 */
507typedef enum {
508 AHD_DV_WAIT_SIMQ_EMPTY = 0x01,
509 AHD_DV_WAIT_SIMQ_RELEASE = 0x02,
510 AHD_DV_ACTIVE = 0x04,
511 AHD_DV_SHUTDOWN = 0x08,
512 AHD_RUN_CMPLT_Q_TIMER = 0x10
513} ahd_linux_softc_flags;
514
515TAILQ_HEAD(ahd_completeq, ahd_cmd);
516
517struct ahd_platform_data {
518 /*
519 * Fields accessed from interrupt context.
520 */
521 struct ahd_linux_target *targets[AHD_NUM_TARGETS];
522 TAILQ_HEAD(, ahd_linux_device) device_runq;
523 struct ahd_completeq completeq;
524
525 spinlock_t spin_lock;
526 struct tasklet_struct runq_tasklet;
527 u_int qfrozen;
528 pid_t dv_pid;
529 struct timer_list completeq_timer;
530 struct timer_list reset_timer;
531 struct timer_list stats_timer;
532 struct semaphore eh_sem;
533 struct semaphore dv_sem;
534 struct semaphore dv_cmd_sem; /* XXX This needs to be in
535 * the target struct
536 */
537 struct scsi_device *dv_scsi_dev;
538 struct Scsi_Host *host; /* pointer to scsi host */
539#define AHD_LINUX_NOIRQ ((uint32_t)~0)
540 uint32_t irq; /* IRQ for this adapter */
541 uint32_t bios_address;
542 uint32_t mem_busaddr; /* Mem Base Addr */
543 uint64_t hw_dma_mask;
544 ahd_linux_softc_flags flags;
545};
546
547/************************** OS Utility Wrappers *******************************/
548#define printf printk
549#define M_NOWAIT GFP_ATOMIC
550#define M_WAITOK 0
551#define malloc(size, type, flags) kmalloc(size, flags)
552#define free(ptr, type) kfree(ptr)
553
554static __inline void ahd_delay(long);
555static __inline void
556ahd_delay(long usec)
557{
558 /*
559 * udelay on Linux can have problems for
560 * multi-millisecond waits. Wait at most
561 * 1024us per call.
562 */
563 while (usec > 0) {
564 udelay(usec % 1024);
565 usec -= 1024;
566 }
567}
568
569
570/***************************** Low Level I/O **********************************/
571static __inline uint8_t ahd_inb(struct ahd_softc * ahd, long port);
572static __inline uint16_t ahd_inw_atomic(struct ahd_softc * ahd, long port);
573static __inline void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);
574static __inline void ahd_outw_atomic(struct ahd_softc * ahd,
575 long port, uint16_t val);
576static __inline void ahd_outsb(struct ahd_softc * ahd, long port,
577 uint8_t *, int count);
578static __inline void ahd_insb(struct ahd_softc * ahd, long port,
579 uint8_t *, int count);
580
581static __inline uint8_t
582ahd_inb(struct ahd_softc * ahd, long port)
583{
584 uint8_t x;
585
586 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
587 x = readb(ahd->bshs[0].maddr + port);
588 } else {
589 x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
590 }
591 mb();
592 return (x);
593}
594
595static __inline uint16_t
596ahd_inw_atomic(struct ahd_softc * ahd, long port)
597{
598 uint8_t x;
599
600 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
601 x = readw(ahd->bshs[0].maddr + port);
602 } else {
603 x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
604 }
605 mb();
606 return (x);
607}
608
609static __inline void
610ahd_outb(struct ahd_softc * ahd, long port, uint8_t val)
611{
612 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
613 writeb(val, ahd->bshs[0].maddr + port);
614 } else {
615 outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
616 }
617 mb();
618}
619
620static __inline void
621ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val)
622{
623 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
624 writew(val, ahd->bshs[0].maddr + port);
625 } else {
626 outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
627 }
628 mb();
629}
630
631static __inline void
632ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
633{
634 int i;
635
636 /*
637 * There is probably a more efficient way to do this on Linux
638 * but we don't use this for anything speed critical and this
639 * should work.
640 */
641 for (i = 0; i < count; i++)
642 ahd_outb(ahd, port, *array++);
643}
644
645static __inline void
646ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
647{
648 int i;
649
650 /*
651 * There is probably a more efficient way to do this on Linux
652 * but we don't use this for anything speed critical and this
653 * should work.
654 */
655 for (i = 0; i < count; i++)
656 *array++ = ahd_inb(ahd, port);
657}
658
659/**************************** Initialization **********************************/
660int ahd_linux_register_host(struct ahd_softc *,
661 Scsi_Host_Template *);
662
663uint64_t ahd_linux_get_memsize(void);
664
665/*************************** Pretty Printing **********************************/
666struct info_str {
667 char *buffer;
668 int length;
669 off_t offset;
670 int pos;
671};
672
673void ahd_format_transinfo(struct info_str *info,
674 struct ahd_transinfo *tinfo);
675
676/******************************** Locking *************************************/
677/* Lock protecting internal data structures */
678static __inline void ahd_lockinit(struct ahd_softc *);
679static __inline void ahd_lock(struct ahd_softc *, unsigned long *flags);
680static __inline void ahd_unlock(struct ahd_softc *, unsigned long *flags);
681
682/* Lock acquisition and release of the above lock in midlayer entry points. */
683static __inline void ahd_midlayer_entrypoint_lock(struct ahd_softc *,
684 unsigned long *flags);
685static __inline void ahd_midlayer_entrypoint_unlock(struct ahd_softc *,
686 unsigned long *flags);
687
688/* Lock held during command compeletion to the upper layer */
689static __inline void ahd_done_lockinit(struct ahd_softc *);
690static __inline void ahd_done_lock(struct ahd_softc *, unsigned long *flags);
691static __inline void ahd_done_unlock(struct ahd_softc *, unsigned long *flags);
692
693/* Lock held during ahd_list manipulation and ahd softc frees */
694extern spinlock_t ahd_list_spinlock;
695static __inline void ahd_list_lockinit(void);
696static __inline void ahd_list_lock(unsigned long *flags);
697static __inline void ahd_list_unlock(unsigned long *flags);
698
699static __inline void
700ahd_lockinit(struct ahd_softc *ahd)
701{
702 spin_lock_init(&ahd->platform_data->spin_lock);
703}
704
705static __inline void
706ahd_lock(struct ahd_softc *ahd, unsigned long *flags)
707{
708 spin_lock_irqsave(&ahd->platform_data->spin_lock, *flags);
709}
710
711static __inline void
712ahd_unlock(struct ahd_softc *ahd, unsigned long *flags)
713{
714 spin_unlock_irqrestore(&ahd->platform_data->spin_lock, *flags);
715}
716
717static __inline void
718ahd_midlayer_entrypoint_lock(struct ahd_softc *ahd, unsigned long *flags)
719{
720 /*
721 * In 2.5.X and some 2.4.X versions, the midlayer takes our
722 * lock just before calling us, so we avoid locking again.
723 * For other kernel versions, the io_request_lock is taken
724 * just before our entry point is called. In this case, we
725 * trade the io_request_lock for our per-softc lock.
726 */
727#if AHD_SCSI_HAS_HOST_LOCK == 0
728 spin_unlock(&io_request_lock);
729 spin_lock(&ahd->platform_data->spin_lock);
730#endif
731}
732
733static __inline void
734ahd_midlayer_entrypoint_unlock(struct ahd_softc *ahd, unsigned long *flags)
735{
736#if AHD_SCSI_HAS_HOST_LOCK == 0
737 spin_unlock(&ahd->platform_data->spin_lock);
738 spin_lock(&io_request_lock);
739#endif
740}
741
742static __inline void
743ahd_done_lockinit(struct ahd_softc *ahd)
744{
745 /*
746 * In 2.5.X, our own lock is held during completions.
747 * In previous versions, the io_request_lock is used.
748 * In either case, we can't initialize this lock again.
749 */
750}
751
752static __inline void
753ahd_done_lock(struct ahd_softc *ahd, unsigned long *flags)
754{
755#if AHD_SCSI_HAS_HOST_LOCK == 0
756 spin_lock(&io_request_lock);
757#endif
758}
759
760static __inline void
761ahd_done_unlock(struct ahd_softc *ahd, unsigned long *flags)
762{
763#if AHD_SCSI_HAS_HOST_LOCK == 0
764 spin_unlock(&io_request_lock);
765#endif
766}
767
768static __inline void
769ahd_list_lockinit(void)
770{
771 spin_lock_init(&ahd_list_spinlock);
772}
773
774static __inline void
775ahd_list_lock(unsigned long *flags)
776{
777 spin_lock_irqsave(&ahd_list_spinlock, *flags);
778}
779
780static __inline void
781ahd_list_unlock(unsigned long *flags)
782{
783 spin_unlock_irqrestore(&ahd_list_spinlock, *flags);
784}
785
786/******************************* PCI Definitions ******************************/
787/*
788 * PCIM_xxx: mask to locate subfield in register
789 * PCIR_xxx: config register offset
790 * PCIC_xxx: device class
791 * PCIS_xxx: device subclass
792 * PCIP_xxx: device programming interface
793 * PCIV_xxx: PCI vendor ID (only required to fixup ancient devices)
794 * PCID_xxx: device ID
795 */
796#define PCIR_DEVVENDOR 0x00
797#define PCIR_VENDOR 0x00
798#define PCIR_DEVICE 0x02
799#define PCIR_COMMAND 0x04
800#define PCIM_CMD_PORTEN 0x0001
801#define PCIM_CMD_MEMEN 0x0002
802#define PCIM_CMD_BUSMASTEREN 0x0004
803#define PCIM_CMD_MWRICEN 0x0010
804#define PCIM_CMD_PERRESPEN 0x0040
805#define PCIM_CMD_SERRESPEN 0x0100
806#define PCIR_STATUS 0x06
807#define PCIR_REVID 0x08
808#define PCIR_PROGIF 0x09
809#define PCIR_SUBCLASS 0x0a
810#define PCIR_CLASS 0x0b
811#define PCIR_CACHELNSZ 0x0c
812#define PCIR_LATTIMER 0x0d
813#define PCIR_HEADERTYPE 0x0e
814#define PCIM_MFDEV 0x80
815#define PCIR_BIST 0x0f
816#define PCIR_CAP_PTR 0x34
817
818/* config registers for header type 0 devices */
819#define PCIR_MAPS 0x10
820#define PCIR_SUBVEND_0 0x2c
821#define PCIR_SUBDEV_0 0x2e
822
823/****************************** PCI-X definitions *****************************/
824#define PCIXR_COMMAND 0x96
825#define PCIXR_DEVADDR 0x98
826#define PCIXM_DEVADDR_FNUM 0x0003 /* Function Number */
827#define PCIXM_DEVADDR_DNUM 0x00F8 /* Device Number */
828#define PCIXM_DEVADDR_BNUM 0xFF00 /* Bus Number */
829#define PCIXR_STATUS 0x9A
830#define PCIXM_STATUS_64BIT 0x0001 /* Active 64bit connection to device. */
831#define PCIXM_STATUS_133CAP 0x0002 /* Device is 133MHz capable */
832#define PCIXM_STATUS_SCDISC 0x0004 /* Split Completion Discarded */
833#define PCIXM_STATUS_UNEXPSC 0x0008 /* Unexpected Split Completion */
834#define PCIXM_STATUS_CMPLEXDEV 0x0010 /* Device Complexity (set == bridge) */
835#define PCIXM_STATUS_MAXMRDBC 0x0060 /* Maximum Burst Read Count */
836#define PCIXM_STATUS_MAXSPLITS 0x0380 /* Maximum Split Transactions */
837#define PCIXM_STATUS_MAXCRDS 0x1C00 /* Maximum Cumulative Read Size */
838#define PCIXM_STATUS_RCVDSCEM 0x2000 /* Received a Split Comp w/Error msg */
839
840extern struct pci_driver aic79xx_pci_driver;
841
842typedef enum
843{
844 AHD_POWER_STATE_D0,
845 AHD_POWER_STATE_D1,
846 AHD_POWER_STATE_D2,
847 AHD_POWER_STATE_D3
848} ahd_power_state;
849
850void ahd_power_state_change(struct ahd_softc *ahd,
851 ahd_power_state new_state);
852
853/******************************* PCI Routines *********************************/
854int ahd_linux_pci_init(void);
855void ahd_linux_pci_exit(void);
856int ahd_pci_map_registers(struct ahd_softc *ahd);
857int ahd_pci_map_int(struct ahd_softc *ahd);
858
859static __inline uint32_t ahd_pci_read_config(ahd_dev_softc_t pci,
860 int reg, int width);
861
862static __inline uint32_t
863ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width)
864{
865 switch (width) {
866 case 1:
867 {
868 uint8_t retval;
869
870 pci_read_config_byte(pci, reg, &retval);
871 return (retval);
872 }
873 case 2:
874 {
875 uint16_t retval;
876 pci_read_config_word(pci, reg, &retval);
877 return (retval);
878 }
879 case 4:
880 {
881 uint32_t retval;
882 pci_read_config_dword(pci, reg, &retval);
883 return (retval);
884 }
885 default:
886 panic("ahd_pci_read_config: Read size too big");
887 /* NOTREACHED */
888 return (0);
889 }
890}
891
892static __inline void ahd_pci_write_config(ahd_dev_softc_t pci,
893 int reg, uint32_t value,
894 int width);
895
896static __inline void
897ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width)
898{
899 switch (width) {
900 case 1:
901 pci_write_config_byte(pci, reg, value);
902 break;
903 case 2:
904 pci_write_config_word(pci, reg, value);
905 break;
906 case 4:
907 pci_write_config_dword(pci, reg, value);
908 break;
909 default:
910 panic("ahd_pci_write_config: Write size too big");
911 /* NOTREACHED */
912 }
913}
914
915static __inline int ahd_get_pci_function(ahd_dev_softc_t);
916static __inline int
917ahd_get_pci_function(ahd_dev_softc_t pci)
918{
919 return (PCI_FUNC(pci->devfn));
920}
921
922static __inline int ahd_get_pci_slot(ahd_dev_softc_t);
923static __inline int
924ahd_get_pci_slot(ahd_dev_softc_t pci)
925{
926 return (PCI_SLOT(pci->devfn));
927}
928
929static __inline int ahd_get_pci_bus(ahd_dev_softc_t);
930static __inline int
931ahd_get_pci_bus(ahd_dev_softc_t pci)
932{
933 return (pci->bus->number);
934}
935
936static __inline void ahd_flush_device_writes(struct ahd_softc *);
937static __inline void
938ahd_flush_device_writes(struct ahd_softc *ahd)
939{
940 /* XXX Is this sufficient for all architectures??? */
941 ahd_inb(ahd, INTSTAT);
942}
943
944/**************************** Proc FS Support *********************************/
945#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
946int ahd_linux_proc_info(char *, char **, off_t, int, int, int);
947#else
948int ahd_linux_proc_info(struct Scsi_Host *, char *, char **,
949 off_t, int, int);
950#endif
951
952/*************************** Domain Validation ********************************/
953#define AHD_DV_CMD(cmd) ((cmd)->scsi_done == ahd_linux_dv_complete)
954#define AHD_DV_SIMQ_FROZEN(ahd) \
955 ((((ahd)->platform_data->flags & AHD_DV_ACTIVE) != 0) \
956 && (ahd)->platform_data->qfrozen == 1)
957
958/*********************** Transaction Access Wrappers **************************/
959static __inline void ahd_cmd_set_transaction_status(Scsi_Cmnd *, uint32_t);
960static __inline void ahd_set_transaction_status(struct scb *, uint32_t);
961static __inline void ahd_cmd_set_scsi_status(Scsi_Cmnd *, uint32_t);
962static __inline void ahd_set_scsi_status(struct scb *, uint32_t);
963static __inline uint32_t ahd_cmd_get_transaction_status(Scsi_Cmnd *cmd);
964static __inline uint32_t ahd_get_transaction_status(struct scb *);
965static __inline uint32_t ahd_cmd_get_scsi_status(Scsi_Cmnd *cmd);
966static __inline uint32_t ahd_get_scsi_status(struct scb *);
967static __inline void ahd_set_transaction_tag(struct scb *, int, u_int);
968static __inline u_long ahd_get_transfer_length(struct scb *);
969static __inline int ahd_get_transfer_dir(struct scb *);
970static __inline void ahd_set_residual(struct scb *, u_long);
971static __inline void ahd_set_sense_residual(struct scb *scb, u_long resid);
972static __inline u_long ahd_get_residual(struct scb *);
973static __inline u_long ahd_get_sense_residual(struct scb *);
974static __inline int ahd_perform_autosense(struct scb *);
975static __inline uint32_t ahd_get_sense_bufsize(struct ahd_softc *,
976 struct scb *);
977static __inline void ahd_notify_xfer_settings_change(struct ahd_softc *,
978 struct ahd_devinfo *);
979static __inline void ahd_platform_scb_free(struct ahd_softc *ahd,
980 struct scb *scb);
981static __inline void ahd_freeze_scb(struct scb *scb);
982
983static __inline
984void ahd_cmd_set_transaction_status(Scsi_Cmnd *cmd, uint32_t status)
985{
986 cmd->result &= ~(CAM_STATUS_MASK << 16);
987 cmd->result |= status << 16;
988}
989
990static __inline
991void ahd_set_transaction_status(struct scb *scb, uint32_t status)
992{
993 ahd_cmd_set_transaction_status(scb->io_ctx,status);
994}
995
996static __inline
997void ahd_cmd_set_scsi_status(Scsi_Cmnd *cmd, uint32_t status)
998{
999 cmd->result &= ~0xFFFF;
1000 cmd->result |= status;
1001}
1002
1003static __inline
1004void ahd_set_scsi_status(struct scb *scb, uint32_t status)
1005{
1006 ahd_cmd_set_scsi_status(scb->io_ctx, status);
1007}
1008
1009static __inline
1010uint32_t ahd_cmd_get_transaction_status(Scsi_Cmnd *cmd)
1011{
1012 return ((cmd->result >> 16) & CAM_STATUS_MASK);
1013}
1014
1015static __inline
1016uint32_t ahd_get_transaction_status(struct scb *scb)
1017{
1018 return (ahd_cmd_get_transaction_status(scb->io_ctx));
1019}
1020
1021static __inline
1022uint32_t ahd_cmd_get_scsi_status(Scsi_Cmnd *cmd)
1023{
1024 return (cmd->result & 0xFFFF);
1025}
1026
1027static __inline
1028uint32_t ahd_get_scsi_status(struct scb *scb)
1029{
1030 return (ahd_cmd_get_scsi_status(scb->io_ctx));
1031}
1032
1033static __inline
1034void ahd_set_transaction_tag(struct scb *scb, int enabled, u_int type)
1035{
1036 /*
1037 * Nothing to do for linux as the incoming transaction
1038 * has no concept of tag/non tagged, etc.
1039 */
1040}
1041
1042static __inline
1043u_long ahd_get_transfer_length(struct scb *scb)
1044{
1045 return (scb->platform_data->xfer_len);
1046}
1047
1048static __inline
1049int ahd_get_transfer_dir(struct scb *scb)
1050{
1051 return (scb->io_ctx->sc_data_direction);
1052}
1053
1054static __inline
1055void ahd_set_residual(struct scb *scb, u_long resid)
1056{
1057 scb->io_ctx->resid = resid;
1058}
1059
1060static __inline
1061void ahd_set_sense_residual(struct scb *scb, u_long resid)
1062{
1063 scb->platform_data->sense_resid = resid;
1064}
1065
1066static __inline
1067u_long ahd_get_residual(struct scb *scb)
1068{
1069 return (scb->io_ctx->resid);
1070}
1071
1072static __inline
1073u_long ahd_get_sense_residual(struct scb *scb)
1074{
1075 return (scb->platform_data->sense_resid);
1076}
1077
1078static __inline
1079int ahd_perform_autosense(struct scb *scb)
1080{
1081 /*
1082 * We always perform autosense in Linux.
1083 * On other platforms this is set on a
1084 * per-transaction basis.
1085 */
1086 return (1);
1087}
1088
1089static __inline uint32_t
1090ahd_get_sense_bufsize(struct ahd_softc *ahd, struct scb *scb)
1091{
1092 return (sizeof(struct scsi_sense_data));
1093}
1094
1095static __inline void
1096ahd_notify_xfer_settings_change(struct ahd_softc *ahd,
1097 struct ahd_devinfo *devinfo)
1098{
1099 /* Nothing to do here for linux */
1100}
1101
1102static __inline void
1103ahd_platform_scb_free(struct ahd_softc *ahd, struct scb *scb)
1104{
1105 ahd->flags &= ~AHD_RESOURCE_SHORTAGE;
1106}
1107
1108int ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg);
1109void ahd_platform_free(struct ahd_softc *ahd);
1110void ahd_platform_init(struct ahd_softc *ahd);
1111void ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb);
1112void ahd_freeze_simq(struct ahd_softc *ahd);
1113void ahd_release_simq(struct ahd_softc *ahd);
1114
1115static __inline void
1116ahd_freeze_scb(struct scb *scb)
1117{
1118 if ((scb->io_ctx->result & (CAM_DEV_QFRZN << 16)) == 0) {
1119 scb->io_ctx->result |= CAM_DEV_QFRZN << 16;
1120 scb->platform_data->dev->qfrozen++;
1121 }
1122}
1123
1124void ahd_platform_set_tags(struct ahd_softc *ahd,
1125 struct ahd_devinfo *devinfo, ahd_queue_alg);
1126int ahd_platform_abort_scbs(struct ahd_softc *ahd, int target,
1127 char channel, int lun, u_int tag,
1128 role_t role, uint32_t status);
1129irqreturn_t
1130 ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs);
1131void ahd_platform_flushwork(struct ahd_softc *ahd);
1132int ahd_softc_comp(struct ahd_softc *, struct ahd_softc *);
1133void ahd_done(struct ahd_softc*, struct scb*);
1134void ahd_send_async(struct ahd_softc *, char channel,
1135 u_int target, u_int lun, ac_code, void *);
1136void ahd_print_path(struct ahd_softc *, struct scb *);
1137void ahd_platform_dump_card_state(struct ahd_softc *ahd);
1138
1139#ifdef CONFIG_PCI
1140#define AHD_PCI_CONFIG 1
1141#else
1142#define AHD_PCI_CONFIG 0
1143#endif
1144#define bootverbose aic79xx_verbose
1145extern uint32_t aic79xx_verbose;
1146
1147#endif /* _AIC79XX_LINUX_H_ */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-25 19:29:10 -0500