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/drivers/scsi/aic7xxx/aic79xx_osm.h

http://github.com/mirrors/linux
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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#166 $
 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/interrupt.h>
 51#include <linux/module.h>
 52#include <linux/slab.h>
 53#include <asm/byteorder.h>
 54#include <asm/io.h>
 55
 56#include <scsi/scsi.h>
 57#include <scsi/scsi_cmnd.h>
 58#include <scsi/scsi_eh.h>
 59#include <scsi/scsi_device.h>
 60#include <scsi/scsi_host.h>
 61#include <scsi/scsi_tcq.h>
 62#include <scsi/scsi_transport.h>
 63#include <scsi/scsi_transport_spi.h>
 64
 65/* Core SCSI definitions */
 66#define AIC_LIB_PREFIX ahd
 67
 68#include "cam.h"
 69#include "queue.h"
 70#include "scsi_message.h"
 71#include "scsi_iu.h"
 72#include "aiclib.h"
 73
 74/*********************************** Debugging ********************************/
 75#ifdef CONFIG_AIC79XX_DEBUG_ENABLE
 76#ifdef CONFIG_AIC79XX_DEBUG_MASK
 77#define AHD_DEBUG 1
 78#define AHD_DEBUG_OPTS CONFIG_AIC79XX_DEBUG_MASK
 79#else
 80/*
 81 * Compile in debugging code, but do not enable any printfs.
 82 */
 83#define AHD_DEBUG 1
 84#define AHD_DEBUG_OPTS 0
 85#endif
 86/* No debugging code. */
 87#endif
 88
 89/********************************** Misc Macros *******************************/
 90#define	powerof2(x)	((((x)-1)&(x))==0)
 91
 92/************************* Forward Declarations *******************************/
 93struct ahd_softc;
 94typedef struct pci_dev *ahd_dev_softc_t;
 95typedef struct scsi_cmnd      *ahd_io_ctx_t;
 96
 97/******************************* Byte Order ***********************************/
 98#define ahd_htobe16(x)	cpu_to_be16(x)
 99#define ahd_htobe32(x)	cpu_to_be32(x)
100#define ahd_htobe64(x)	cpu_to_be64(x)
101#define ahd_htole16(x)	cpu_to_le16(x)
102#define ahd_htole32(x)	cpu_to_le32(x)
103#define ahd_htole64(x)	cpu_to_le64(x)
104
105#define ahd_be16toh(x)	be16_to_cpu(x)
106#define ahd_be32toh(x)	be32_to_cpu(x)
107#define ahd_be64toh(x)	be64_to_cpu(x)
108#define ahd_le16toh(x)	le16_to_cpu(x)
109#define ahd_le32toh(x)	le32_to_cpu(x)
110#define ahd_le64toh(x)	le64_to_cpu(x)
111
112/************************* Configuration Data *********************************/
113extern uint32_t aic79xx_allow_memio;
114extern struct scsi_host_template aic79xx_driver_template;
115
116/***************************** Bus Space/DMA **********************************/
117
118typedef uint32_t bus_size_t;
119
120typedef enum {
121	BUS_SPACE_MEMIO,
122	BUS_SPACE_PIO
123} bus_space_tag_t;
124
125typedef union {
126	u_long		  ioport;
127	volatile uint8_t __iomem *maddr;
128} bus_space_handle_t;
129
130typedef struct bus_dma_segment
131{
132	dma_addr_t	ds_addr;
133	bus_size_t	ds_len;
134} bus_dma_segment_t;
135
136struct ahd_linux_dma_tag
137{
138	bus_size_t	alignment;
139	bus_size_t	boundary;
140	bus_size_t	maxsize;
141};
142typedef struct ahd_linux_dma_tag* bus_dma_tag_t;
143
144typedef dma_addr_t bus_dmamap_t;
145
146typedef int bus_dma_filter_t(void*, dma_addr_t);
147typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int);
148
149#define BUS_DMA_WAITOK		0x0
150#define BUS_DMA_NOWAIT		0x1
151#define BUS_DMA_ALLOCNOW	0x2
152#define BUS_DMA_LOAD_SEGS	0x4	/*
153					 * Argument is an S/G list not
154					 * a single buffer.
155					 */
156
157#define BUS_SPACE_MAXADDR	0xFFFFFFFF
158#define BUS_SPACE_MAXADDR_32BIT	0xFFFFFFFF
159#define BUS_SPACE_MAXSIZE_32BIT	0xFFFFFFFF
160
161int	ahd_dma_tag_create(struct ahd_softc *, bus_dma_tag_t /*parent*/,
162			   bus_size_t /*alignment*/, bus_size_t /*boundary*/,
163			   dma_addr_t /*lowaddr*/, dma_addr_t /*highaddr*/,
164			   bus_dma_filter_t*/*filter*/, void */*filterarg*/,
165			   bus_size_t /*maxsize*/, int /*nsegments*/,
166			   bus_size_t /*maxsegsz*/, int /*flags*/,
167			   bus_dma_tag_t */*dma_tagp*/);
168
169void	ahd_dma_tag_destroy(struct ahd_softc *, bus_dma_tag_t /*tag*/);
170
171int	ahd_dmamem_alloc(struct ahd_softc *, bus_dma_tag_t /*dmat*/,
172			 void** /*vaddr*/, int /*flags*/,
173			 bus_dmamap_t* /*mapp*/);
174
175void	ahd_dmamem_free(struct ahd_softc *, bus_dma_tag_t /*dmat*/,
176			void* /*vaddr*/, bus_dmamap_t /*map*/);
177
178void	ahd_dmamap_destroy(struct ahd_softc *, bus_dma_tag_t /*tag*/,
179			   bus_dmamap_t /*map*/);
180
181int	ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t /*dmat*/,
182			bus_dmamap_t /*map*/, void * /*buf*/,
183			bus_size_t /*buflen*/, bus_dmamap_callback_t *,
184			void */*callback_arg*/, int /*flags*/);
185
186int	ahd_dmamap_unload(struct ahd_softc *, bus_dma_tag_t, bus_dmamap_t);
187
188/*
189 * Operations performed by ahd_dmamap_sync().
190 */
191#define BUS_DMASYNC_PREREAD	0x01	/* pre-read synchronization */
192#define BUS_DMASYNC_POSTREAD	0x02	/* post-read synchronization */
193#define BUS_DMASYNC_PREWRITE	0x04	/* pre-write synchronization */
194#define BUS_DMASYNC_POSTWRITE	0x08	/* post-write synchronization */
195
196/*
197 * XXX
198 * ahd_dmamap_sync is only used on buffers allocated with
199 * the pci_alloc_consistent() API.  Although I'm not sure how
200 * this works on architectures with a write buffer, Linux does
201 * not have an API to sync "coherent" memory.  Perhaps we need
202 * to do an mb()?
203 */
204#define ahd_dmamap_sync(ahd, dma_tag, dmamap, offset, len, op)
205
206/********************************** Includes **********************************/
207#ifdef CONFIG_AIC79XX_REG_PRETTY_PRINT
208#define AIC_DEBUG_REGISTERS 1
209#else
210#define AIC_DEBUG_REGISTERS 0
211#endif
212#include "aic79xx.h"
213
214/***************************** SMP support ************************************/
215#include <linux/spinlock.h>
216
217#define AIC79XX_DRIVER_VERSION "3.0"
218
219/*************************** Device Data Structures ***************************/
220/*
221 * A per probed device structure used to deal with some error recovery
222 * scenarios that the Linux mid-layer code just doesn't know how to
223 * handle.  The structure allocated for a device only becomes persistent
224 * after a successfully completed inquiry command to the target when
225 * that inquiry data indicates a lun is present.
226 */
227
228typedef enum {
229	AHD_DEV_FREEZE_TIL_EMPTY = 0x02, /* Freeze queue until active == 0 */
230	AHD_DEV_Q_BASIC		 = 0x10, /* Allow basic device queuing */
231	AHD_DEV_Q_TAGGED	 = 0x20, /* Allow full SCSI2 command queueing */
232	AHD_DEV_PERIODIC_OTAG	 = 0x40, /* Send OTAG to prevent starvation */
233} ahd_linux_dev_flags;
234
235struct ahd_linux_device {
236	TAILQ_ENTRY(ahd_linux_device) links;
237
238	/*
239	 * The number of transactions currently
240	 * queued to the device.
241	 */
242	int			active;
243
244	/*
245	 * The currently allowed number of 
246	 * transactions that can be queued to
247	 * the device.  Must be signed for
248	 * conversion from tagged to untagged
249	 * mode where the device may have more
250	 * than one outstanding active transaction.
251	 */
252	int			openings;
253
254	/*
255	 * A positive count indicates that this
256	 * device's queue is halted.
257	 */
258	u_int			qfrozen;
259	
260	/*
261	 * Cumulative command counter.
262	 */
263	u_long			commands_issued;
264
265	/*
266	 * The number of tagged transactions when
267	 * running at our current opening level
268	 * that have been successfully received by
269	 * this device since the last QUEUE FULL.
270	 */
271	u_int			tag_success_count;
272#define AHD_TAG_SUCCESS_INTERVAL 50
273
274	ahd_linux_dev_flags	flags;
275
276	/*
277	 * Per device timer.
278	 */
279	struct timer_list	timer;
280
281	/*
282	 * The high limit for the tags variable.
283	 */
284	u_int			maxtags;
285
286	/*
287	 * The computed number of tags outstanding
288	 * at the time of the last QUEUE FULL event.
289	 */
290	u_int			tags_on_last_queuefull;
291
292	/*
293	 * How many times we have seen a queue full
294	 * with the same number of tags.  This is used
295	 * to stop our adaptive queue depth algorithm
296	 * on devices with a fixed number of tags.
297	 */
298	u_int			last_queuefull_same_count;
299#define AHD_LOCK_TAGS_COUNT 50
300
301	/*
302	 * How many transactions have been queued
303	 * without the device going idle.  We use
304	 * this statistic to determine when to issue
305	 * an ordered tag to prevent transaction
306	 * starvation.  This statistic is only updated
307	 * if the AHD_DEV_PERIODIC_OTAG flag is set
308	 * on this device.
309	 */
310	u_int			commands_since_idle_or_otag;
311#define AHD_OTAG_THRESH	500
312};
313
314/********************* Definitions Required by the Core ***********************/
315/*
316 * Number of SG segments we require.  So long as the S/G segments for
317 * a particular transaction are allocated in a physically contiguous
318 * manner and are allocated below 4GB, the number of S/G segments is
319 * unrestricted.
320 */
321#define	AHD_NSEG 128
322
323/*
324 * Per-SCB OSM storage.
325 */
326struct scb_platform_data {
327	struct ahd_linux_device	*dev;
328	dma_addr_t		 buf_busaddr;
329	uint32_t		 xfer_len;
330	uint32_t		 sense_resid;	/* Auto-Sense residual */
331};
332
333/*
334 * Define a structure used for each host adapter.  All members are
335 * aligned on a boundary >= the size of the member to honor the
336 * alignment restrictions of the various platforms supported by
337 * this driver.
338 */
339struct ahd_platform_data {
340	/*
341	 * Fields accessed from interrupt context.
342	 */
343	struct scsi_target *starget[AHD_NUM_TARGETS]; 
344
345	spinlock_t		 spin_lock;
346	struct completion	*eh_done;
347	struct Scsi_Host        *host;		/* pointer to scsi host */
348#define AHD_LINUX_NOIRQ	((uint32_t)~0)
349	uint32_t		 irq;		/* IRQ for this adapter */
350	uint32_t		 bios_address;
351	resource_size_t		 mem_busaddr;	/* Mem Base Addr */
352};
353
354void ahd_delay(long);
355
356/***************************** Low Level I/O **********************************/
357uint8_t ahd_inb(struct ahd_softc * ahd, long port);
358void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);
359void ahd_outw_atomic(struct ahd_softc * ahd,
360				     long port, uint16_t val);
361void ahd_outsb(struct ahd_softc * ahd, long port,
362			       uint8_t *, int count);
363void ahd_insb(struct ahd_softc * ahd, long port,
364			       uint8_t *, int count);
365
366/**************************** Initialization **********************************/
367int		ahd_linux_register_host(struct ahd_softc *,
368					struct scsi_host_template *);
369
370/******************************** Locking *************************************/
371static inline void
372ahd_lockinit(struct ahd_softc *ahd)
373{
374	spin_lock_init(&ahd->platform_data->spin_lock);
375}
376
377static inline void
378ahd_lock(struct ahd_softc *ahd, unsigned long *flags)
379{
380	spin_lock_irqsave(&ahd->platform_data->spin_lock, *flags);
381}
382
383static inline void
384ahd_unlock(struct ahd_softc *ahd, unsigned long *flags)
385{
386	spin_unlock_irqrestore(&ahd->platform_data->spin_lock, *flags);
387}
388
389/******************************* PCI Definitions ******************************/
390/*
391 * PCIM_xxx: mask to locate subfield in register
392 * PCIR_xxx: config register offset
393 * PCIC_xxx: device class
394 * PCIS_xxx: device subclass
395 * PCIP_xxx: device programming interface
396 * PCIV_xxx: PCI vendor ID (only required to fixup ancient devices)
397 * PCID_xxx: device ID
398 */
399#define PCIR_DEVVENDOR		0x00
400#define PCIR_VENDOR		0x00
401#define PCIR_DEVICE		0x02
402#define PCIR_COMMAND		0x04
403#define PCIM_CMD_PORTEN		0x0001
404#define PCIM_CMD_MEMEN		0x0002
405#define PCIM_CMD_BUSMASTEREN	0x0004
406#define PCIM_CMD_MWRICEN	0x0010
407#define PCIM_CMD_PERRESPEN	0x0040
408#define	PCIM_CMD_SERRESPEN	0x0100
409#define PCIR_STATUS		0x06
410#define PCIR_REVID		0x08
411#define PCIR_PROGIF		0x09
412#define PCIR_SUBCLASS		0x0a
413#define PCIR_CLASS		0x0b
414#define PCIR_CACHELNSZ		0x0c
415#define PCIR_LATTIMER		0x0d
416#define PCIR_HEADERTYPE		0x0e
417#define PCIM_MFDEV		0x80
418#define PCIR_BIST		0x0f
419#define PCIR_CAP_PTR		0x34
420
421/* config registers for header type 0 devices */
422#define PCIR_MAPS	0x10
423#define PCIR_SUBVEND_0	0x2c
424#define PCIR_SUBDEV_0	0x2e
425
426/****************************** PCI-X definitions *****************************/
427#define PCIXR_COMMAND	0x96
428#define PCIXR_DEVADDR	0x98
429#define PCIXM_DEVADDR_FNUM	0x0003	/* Function Number */
430#define PCIXM_DEVADDR_DNUM	0x00F8	/* Device Number */
431#define PCIXM_DEVADDR_BNUM	0xFF00	/* Bus Number */
432#define PCIXR_STATUS	0x9A
433#define PCIXM_STATUS_64BIT	0x0001	/* Active 64bit connection to device. */
434#define PCIXM_STATUS_133CAP	0x0002	/* Device is 133MHz capable */
435#define PCIXM_STATUS_SCDISC	0x0004	/* Split Completion Discarded */
436#define PCIXM_STATUS_UNEXPSC	0x0008	/* Unexpected Split Completion */
437#define PCIXM_STATUS_CMPLEXDEV	0x0010	/* Device Complexity (set == bridge) */
438#define PCIXM_STATUS_MAXMRDBC	0x0060	/* Maximum Burst Read Count */
439#define PCIXM_STATUS_MAXSPLITS	0x0380	/* Maximum Split Transactions */
440#define PCIXM_STATUS_MAXCRDS	0x1C00	/* Maximum Cumulative Read Size */
441#define PCIXM_STATUS_RCVDSCEM	0x2000	/* Received a Split Comp w/Error msg */
442
443typedef enum
444{
445	AHD_POWER_STATE_D0,
446	AHD_POWER_STATE_D1,
447	AHD_POWER_STATE_D2,
448	AHD_POWER_STATE_D3
449} ahd_power_state;
450
451void ahd_power_state_change(struct ahd_softc *ahd,
452			    ahd_power_state new_state);
453
454/******************************* PCI Routines *********************************/
455int			 ahd_linux_pci_init(void);
456void			 ahd_linux_pci_exit(void);
457int			 ahd_pci_map_registers(struct ahd_softc *ahd);
458int			 ahd_pci_map_int(struct ahd_softc *ahd);
459
460uint32_t		 ahd_pci_read_config(ahd_dev_softc_t pci,
461					     int reg, int width);
462void			 ahd_pci_write_config(ahd_dev_softc_t pci,
463					  int reg, uint32_t value,
464					  int width);
465
466static inline int ahd_get_pci_function(ahd_dev_softc_t);
467static inline int
468ahd_get_pci_function(ahd_dev_softc_t pci)
469{
470	return (PCI_FUNC(pci->devfn));
471}
472
473static inline int ahd_get_pci_slot(ahd_dev_softc_t);
474static inline int
475ahd_get_pci_slot(ahd_dev_softc_t pci)
476{
477	return (PCI_SLOT(pci->devfn));
478}
479
480static inline int ahd_get_pci_bus(ahd_dev_softc_t);
481static inline int
482ahd_get_pci_bus(ahd_dev_softc_t pci)
483{
484	return (pci->bus->number);
485}
486
487static inline void ahd_flush_device_writes(struct ahd_softc *);
488static inline void
489ahd_flush_device_writes(struct ahd_softc *ahd)
490{
491	/* XXX Is this sufficient for all architectures??? */
492	ahd_inb(ahd, INTSTAT);
493}
494
495/**************************** Proc FS Support *********************************/
496int	ahd_proc_write_seeprom(struct Scsi_Host *, char *, int);
497int	ahd_linux_show_info(struct seq_file *,struct Scsi_Host *);
498
499/*********************** Transaction Access Wrappers **************************/
500static inline void ahd_cmd_set_transaction_status(struct scsi_cmnd *, uint32_t);
501static inline void ahd_set_transaction_status(struct scb *, uint32_t);
502static inline void ahd_cmd_set_scsi_status(struct scsi_cmnd *, uint32_t);
503static inline void ahd_set_scsi_status(struct scb *, uint32_t);
504static inline uint32_t ahd_cmd_get_transaction_status(struct scsi_cmnd *cmd);
505static inline uint32_t ahd_get_transaction_status(struct scb *);
506static inline uint32_t ahd_cmd_get_scsi_status(struct scsi_cmnd *cmd);
507static inline uint32_t ahd_get_scsi_status(struct scb *);
508static inline void ahd_set_transaction_tag(struct scb *, int, u_int);
509static inline u_long ahd_get_transfer_length(struct scb *);
510static inline int ahd_get_transfer_dir(struct scb *);
511static inline void ahd_set_residual(struct scb *, u_long);
512static inline void ahd_set_sense_residual(struct scb *scb, u_long resid);
513static inline u_long ahd_get_residual(struct scb *);
514static inline u_long ahd_get_sense_residual(struct scb *);
515static inline int ahd_perform_autosense(struct scb *);
516static inline uint32_t ahd_get_sense_bufsize(struct ahd_softc *,
517					       struct scb *);
518static inline void ahd_notify_xfer_settings_change(struct ahd_softc *,
519						     struct ahd_devinfo *);
520static inline void ahd_platform_scb_free(struct ahd_softc *ahd,
521					   struct scb *scb);
522static inline void ahd_freeze_scb(struct scb *scb);
523
524static inline
525void ahd_cmd_set_transaction_status(struct scsi_cmnd *cmd, uint32_t status)
526{
527	cmd->result &= ~(CAM_STATUS_MASK << 16);
528	cmd->result |= status << 16;
529}
530
531static inline
532void ahd_set_transaction_status(struct scb *scb, uint32_t status)
533{
534	ahd_cmd_set_transaction_status(scb->io_ctx,status);
535}
536
537static inline
538void ahd_cmd_set_scsi_status(struct scsi_cmnd *cmd, uint32_t status)
539{
540	cmd->result &= ~0xFFFF;
541	cmd->result |= status;
542}
543
544static inline
545void ahd_set_scsi_status(struct scb *scb, uint32_t status)
546{
547	ahd_cmd_set_scsi_status(scb->io_ctx, status);
548}
549
550static inline
551uint32_t ahd_cmd_get_transaction_status(struct scsi_cmnd *cmd)
552{
553	return ((cmd->result >> 16) & CAM_STATUS_MASK);
554}
555
556static inline
557uint32_t ahd_get_transaction_status(struct scb *scb)
558{
559	return (ahd_cmd_get_transaction_status(scb->io_ctx));
560}
561
562static inline
563uint32_t ahd_cmd_get_scsi_status(struct scsi_cmnd *cmd)
564{
565	return (cmd->result & 0xFFFF);
566}
567
568static inline
569uint32_t ahd_get_scsi_status(struct scb *scb)
570{
571	return (ahd_cmd_get_scsi_status(scb->io_ctx));
572}
573
574static inline
575void ahd_set_transaction_tag(struct scb *scb, int enabled, u_int type)
576{
577	/*
578	 * Nothing to do for linux as the incoming transaction
579	 * has no concept of tag/non tagged, etc.
580	 */
581}
582
583static inline
584u_long ahd_get_transfer_length(struct scb *scb)
585{
586	return (scb->platform_data->xfer_len);
587}
588
589static inline
590int ahd_get_transfer_dir(struct scb *scb)
591{
592	return (scb->io_ctx->sc_data_direction);
593}
594
595static inline
596void ahd_set_residual(struct scb *scb, u_long resid)
597{
598	scsi_set_resid(scb->io_ctx, resid);
599}
600
601static inline
602void ahd_set_sense_residual(struct scb *scb, u_long resid)
603{
604	scb->platform_data->sense_resid = resid;
605}
606
607static inline
608u_long ahd_get_residual(struct scb *scb)
609{
610	return scsi_get_resid(scb->io_ctx);
611}
612
613static inline
614u_long ahd_get_sense_residual(struct scb *scb)
615{
616	return (scb->platform_data->sense_resid);
617}
618
619static inline
620int ahd_perform_autosense(struct scb *scb)
621{
622	/*
623	 * We always perform autosense in Linux.
624	 * On other platforms this is set on a
625	 * per-transaction basis.
626	 */
627	return (1);
628}
629
630static inline uint32_t
631ahd_get_sense_bufsize(struct ahd_softc *ahd, struct scb *scb)
632{
633	return (sizeof(struct scsi_sense_data));
634}
635
636static inline void
637ahd_notify_xfer_settings_change(struct ahd_softc *ahd,
638				struct ahd_devinfo *devinfo)
639{
640	/* Nothing to do here for linux */
641}
642
643static inline void
644ahd_platform_scb_free(struct ahd_softc *ahd, struct scb *scb)
645{
646	ahd->flags &= ~AHD_RESOURCE_SHORTAGE;
647}
648
649int	ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg);
650void	ahd_platform_free(struct ahd_softc *ahd);
651void	ahd_platform_init(struct ahd_softc *ahd);
652void	ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb);
653
654static inline void
655ahd_freeze_scb(struct scb *scb)
656{
657	if ((scb->io_ctx->result & (CAM_DEV_QFRZN << 16)) == 0) {
658                scb->io_ctx->result |= CAM_DEV_QFRZN << 16;
659                scb->platform_data->dev->qfrozen++;
660        }
661}
662
663void	ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
664			      struct ahd_devinfo *devinfo, ahd_queue_alg);
665int	ahd_platform_abort_scbs(struct ahd_softc *ahd, int target,
666				char channel, int lun, u_int tag,
667				role_t role, uint32_t status);
668irqreturn_t
669	ahd_linux_isr(int irq, void *dev_id);
670void	ahd_done(struct ahd_softc*, struct scb*);
671void	ahd_send_async(struct ahd_softc *, char channel,
672		       u_int target, u_int lun, ac_code);
673void	ahd_print_path(struct ahd_softc *, struct scb *);
674
675#ifdef CONFIG_PCI
676#define AHD_PCI_CONFIG 1
677#else
678#define AHD_PCI_CONFIG 0
679#endif
680#define bootverbose aic79xx_verbose
681extern uint32_t aic79xx_verbose;
682
683#endif /* _AIC79XX_LINUX_H_ */