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[PATCH] s390: debug feature changes
[linux-2.6/verdex.git] / drivers / scsi / aic7xxx / aic7xxx.h
blob088cbc23743d56070c47e0e8c828b690bd83c2a0
1 /*
2 * Core definitions and data structures shareable across OS platforms.
3 *
4 * Copyright (c) 1994-2001 Justin T. Gibbs.
5 * Copyright (c) 2000-2001 Adaptec Inc.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions, and the following disclaimer,
13 * without modification.
14 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
15 * substantially similar to the "NO WARRANTY" disclaimer below
16 * ("Disclaimer") and any redistribution must be conditioned upon
17 * including a substantially similar Disclaimer requirement for further
18 * binary redistribution.
19 * 3. Neither the names of the above-listed copyright holders nor the names
20 * of any contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * Alternatively, this software may be distributed under the terms of the
24 * GNU General Public License ("GPL") version 2 as published by the Free
25 * Software Foundation.
26 *
27 * NO WARRANTY
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
36 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
37 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38 * POSSIBILITY OF SUCH DAMAGES.
39 *
40 * $Id: //depot/aic7xxx/aic7xxx/aic7xxx.h#79 $
41 *
42 * $FreeBSD$
43 */
44
45 #ifndef _AIC7XXX_H_
46 #define _AIC7XXX_H_
47
48 /* Register Definitions */
49 #include "aic7xxx_reg.h"
50
51 /************************* Forward Declarations *******************************/
52 struct ahc_platform_data;
53 struct scb_platform_data;
54 struct seeprom_descriptor;
55
56 /****************************** Useful Macros *********************************/
57 #ifndef MAX
58 #define MAX(a,b) (((a) > (b)) ? (a) : (b))
59 #endif
60
61 #ifndef MIN
62 #define MIN(a,b) (((a) < (b)) ? (a) : (b))
63 #endif
64
65 #ifndef TRUE
66 #define TRUE 1
67 #endif
68 #ifndef FALSE
69 #define FALSE 0
70 #endif
71
72 #define NUM_ELEMENTS(array) (sizeof(array) / sizeof(*array))
73
74 #define ALL_CHANNELS '\0'
75 #define ALL_TARGETS_MASK 0xFFFF
76 #define INITIATOR_WILDCARD (~0)
77
78 #define SCSIID_TARGET(ahc, scsiid) \
79 (((scsiid) & ((((ahc)->features & AHC_TWIN) != 0) ? TWIN_TID : TID)) \
80 >> TID_SHIFT)
81 #define SCSIID_OUR_ID(scsiid) \
82 ((scsiid) & OID)
83 #define SCSIID_CHANNEL(ahc, scsiid) \
84 ((((ahc)->features & AHC_TWIN) != 0) \
85 ? ((((scsiid) & TWIN_CHNLB) != 0) ? 'B' : 'A') \
86 : 'A')
87 #define SCB_IS_SCSIBUS_B(ahc, scb) \
88 (SCSIID_CHANNEL(ahc, (scb)->hscb->scsiid) == 'B')
89 #define SCB_GET_OUR_ID(scb) \
90 SCSIID_OUR_ID((scb)->hscb->scsiid)
91 #define SCB_GET_TARGET(ahc, scb) \
92 SCSIID_TARGET((ahc), (scb)->hscb->scsiid)
93 #define SCB_GET_CHANNEL(ahc, scb) \
94 SCSIID_CHANNEL(ahc, (scb)->hscb->scsiid)
95 #define SCB_GET_LUN(scb) \
96 ((scb)->hscb->lun & LID)
97 #define SCB_GET_TARGET_OFFSET(ahc, scb) \
98 (SCB_GET_TARGET(ahc, scb) + (SCB_IS_SCSIBUS_B(ahc, scb) ? 8 : 0))
99 #define SCB_GET_TARGET_MASK(ahc, scb) \
100 (0x01 << (SCB_GET_TARGET_OFFSET(ahc, scb)))
101 #ifdef AHC_DEBUG
102 #define SCB_IS_SILENT(scb) \
103 ((ahc_debug & AHC_SHOW_MASKED_ERRORS) == 0 \
104 && (((scb)->flags & SCB_SILENT) != 0))
105 #else
106 #define SCB_IS_SILENT(scb) \
107 (((scb)->flags & SCB_SILENT) != 0)
108 #endif
109 #define TCL_TARGET_OFFSET(tcl) \
110 ((((tcl) >> 4) & TID) >> 4)
111 #define TCL_LUN(tcl) \
112 (tcl & (AHC_NUM_LUNS - 1))
113 #define BUILD_TCL(scsiid, lun) \
114 ((lun) | (((scsiid) & TID) << 4))
115
116 #ifndef AHC_TARGET_MODE
117 #undef AHC_TMODE_ENABLE
118 #define AHC_TMODE_ENABLE 0
119 #endif
120
121 /**************************** Driver Constants ********************************/
122 /*
123 * The maximum number of supported targets.
124 */
125 #define AHC_NUM_TARGETS 16
126
127 /*
128 * The maximum number of supported luns.
129 * The identify message only supports 64 luns in SPI3.
130 * You can have 2^64 luns when information unit transfers are enabled,
131 * but it is doubtful this driver will ever support IUTs.
132 */
133 #define AHC_NUM_LUNS 64
134
135 /*
136 * The maximum transfer per S/G segment.
137 */
138 #define AHC_MAXTRANSFER_SIZE 0x00ffffff /* limited by 24bit counter */
139
140 /*
141 * The maximum amount of SCB storage in hardware on a controller.
142 * This value represents an upper bound. Controllers vary in the number
143 * they actually support.
144 */
145 #define AHC_SCB_MAX 255
146
147 /*
148 * The maximum number of concurrent transactions supported per driver instance.
149 * Sequencer Control Blocks (SCBs) store per-transaction information. Although
150 * the space for SCBs on the host adapter varies by model, the driver will
151 * page the SCBs between host and controller memory as needed. We are limited
152 * to 253 because:
153 * 1) The 8bit nature of the RISC engine holds us to an 8bit value.
154 * 2) We reserve one value, 255, to represent the invalid element.
155 * 3) Our input queue scheme requires one SCB to always be reserved
156 * in advance of queuing any SCBs. This takes us down to 254.
157 * 4) To handle our output queue correctly on machines that only
158 * support 32bit stores, we must clear the array 4 bytes at a
159 * time. To avoid colliding with a DMA write from the sequencer,
160 * we must be sure that 4 slots are empty when we write to clear
161 * the queue. This reduces us to 253 SCBs: 1 that just completed
162 * and the known three additional empty slots in the queue that
163 * precede it.
164 */
165 #define AHC_MAX_QUEUE 253
166
167 /*
168 * The maximum amount of SCB storage we allocate in host memory. This
169 * number should reflect the 1 additional SCB we require to handle our
170 * qinfifo mechanism.
171 */
172 #define AHC_SCB_MAX_ALLOC (AHC_MAX_QUEUE+1)
173
174 /*
175 * Ring Buffer of incoming target commands.
176 * We allocate 256 to simplify the logic in the sequencer
177 * by using the natural wrap point of an 8bit counter.
178 */
179 #define AHC_TMODE_CMDS 256
180
181 /* Reset line assertion time in us */
182 #define AHC_BUSRESET_DELAY 25
183
184 /******************* Chip Characteristics/Operating Settings *****************/
185 /*
186 * Chip Type
187 * The chip order is from least sophisticated to most sophisticated.
188 */
189 typedef enum {
190 AHC_NONE = 0x0000,
191 AHC_CHIPID_MASK = 0x00FF,
192 AHC_AIC7770 = 0x0001,
193 AHC_AIC7850 = 0x0002,
194 AHC_AIC7855 = 0x0003,
195 AHC_AIC7859 = 0x0004,
196 AHC_AIC7860 = 0x0005,
197 AHC_AIC7870 = 0x0006,
198 AHC_AIC7880 = 0x0007,
199 AHC_AIC7895 = 0x0008,
200 AHC_AIC7895C = 0x0009,
201 AHC_AIC7890 = 0x000a,
202 AHC_AIC7896 = 0x000b,
203 AHC_AIC7892 = 0x000c,
204 AHC_AIC7899 = 0x000d,
205 AHC_VL = 0x0100, /* Bus type VL */
206 AHC_EISA = 0x0200, /* Bus type EISA */
207 AHC_PCI = 0x0400, /* Bus type PCI */
208 AHC_BUS_MASK = 0x0F00
209 } ahc_chip;
210
211 /*
212 * Features available in each chip type.
213 */
214 typedef enum {
215 AHC_FENONE = 0x00000,
216 AHC_ULTRA = 0x00001, /* Supports 20MHz Transfers */
217 AHC_ULTRA2 = 0x00002, /* Supports 40MHz Transfers */
218 AHC_WIDE = 0x00004, /* Wide Channel */
219 AHC_TWIN = 0x00008, /* Twin Channel */
220 AHC_MORE_SRAM = 0x00010, /* 80 bytes instead of 64 */
221 AHC_CMD_CHAN = 0x00020, /* Has a Command DMA Channel */
222 AHC_QUEUE_REGS = 0x00040, /* Has Queue management registers */
223 AHC_SG_PRELOAD = 0x00080, /* Can perform auto-SG preload */
224 AHC_SPIOCAP = 0x00100, /* Has a Serial Port I/O Cap Register */
225 AHC_MULTI_TID = 0x00200, /* Has bitmask of TIDs for select-in */
226 AHC_HS_MAILBOX = 0x00400, /* Has HS_MAILBOX register */
227 AHC_DT = 0x00800, /* Double Transition transfers */
228 AHC_NEW_TERMCTL = 0x01000, /* Newer termination scheme */
229 AHC_MULTI_FUNC = 0x02000, /* Multi-Function Twin Channel Device */
230 AHC_LARGE_SCBS = 0x04000, /* 64byte SCBs */
231 AHC_AUTORATE = 0x08000, /* Automatic update of SCSIRATE/OFFSET*/
232 AHC_AUTOPAUSE = 0x10000, /* Automatic pause on register access */
233 AHC_TARGETMODE = 0x20000, /* Has tested target mode support */
234 AHC_MULTIROLE = 0x40000, /* Space for two roles at a time */
235 AHC_REMOVABLE = 0x80000, /* Hot-Swap supported */
236 AHC_AIC7770_FE = AHC_FENONE,
237 /*
238 * The real 7850 does not support Ultra modes, but there are
239 * several cards that use the generic 7850 PCI ID even though
240 * they are using an Ultra capable chip (7859/7860). We start
241 * out with the AHC_ULTRA feature set and then check the DEVSTATUS
242 * register to determine if the capability is really present.
243 */
244 AHC_AIC7850_FE = AHC_SPIOCAP|AHC_AUTOPAUSE|AHC_TARGETMODE|AHC_ULTRA,
245 AHC_AIC7860_FE = AHC_AIC7850_FE,
246 AHC_AIC7870_FE = AHC_TARGETMODE,
247 AHC_AIC7880_FE = AHC_AIC7870_FE|AHC_ULTRA,
248 /*
249 * Although we have space for both the initiator and
250 * target roles on ULTRA2 chips, we currently disable
251 * the initiator role to allow multi-scsi-id target mode
252 * configurations. We can only respond on the same SCSI
253 * ID as our initiator role if we allow initiator operation.
254 * At some point, we should add a configuration knob to
255 * allow both roles to be loaded.
256 */
257 AHC_AIC7890_FE = AHC_MORE_SRAM|AHC_CMD_CHAN|AHC_ULTRA2
258 |AHC_QUEUE_REGS|AHC_SG_PRELOAD|AHC_MULTI_TID
259 |AHC_HS_MAILBOX|AHC_NEW_TERMCTL|AHC_LARGE_SCBS
260 |AHC_TARGETMODE,
261 AHC_AIC7892_FE = AHC_AIC7890_FE|AHC_DT|AHC_AUTORATE|AHC_AUTOPAUSE,
262 AHC_AIC7895_FE = AHC_AIC7880_FE|AHC_MORE_SRAM|AHC_AUTOPAUSE
263 |AHC_CMD_CHAN|AHC_MULTI_FUNC|AHC_LARGE_SCBS,
264 AHC_AIC7895C_FE = AHC_AIC7895_FE|AHC_MULTI_TID,
265 AHC_AIC7896_FE = AHC_AIC7890_FE|AHC_MULTI_FUNC,
266 AHC_AIC7899_FE = AHC_AIC7892_FE|AHC_MULTI_FUNC
267 } ahc_feature;
268
269 /*
270 * Bugs in the silicon that we work around in software.
271 */
272 typedef enum {
273 AHC_BUGNONE = 0x00,
274 /*
275 * On all chips prior to the U2 product line,
276 * the WIDEODD S/G segment feature does not
277 * work during scsi->HostBus transfers.
278 */
279 AHC_TMODE_WIDEODD_BUG = 0x01,
280 /*
281 * On the aic7890/91 Rev 0 chips, the autoflush
282 * feature does not work. A manual flush of
283 * the DMA FIFO is required.
284 */
285 AHC_AUTOFLUSH_BUG = 0x02,
286 /*
287 * On many chips, cacheline streaming does not work.
288 */
289 AHC_CACHETHEN_BUG = 0x04,
290 /*
291 * On the aic7896/97 chips, cacheline
292 * streaming must be enabled.
293 */
294 AHC_CACHETHEN_DIS_BUG = 0x08,
295 /*
296 * PCI 2.1 Retry failure on non-empty data fifo.
297 */
298 AHC_PCI_2_1_RETRY_BUG = 0x10,
299 /*
300 * Controller does not handle cacheline residuals
301 * properly on S/G segments if PCI MWI instructions
302 * are allowed.
303 */
304 AHC_PCI_MWI_BUG = 0x20,
305 /*
306 * An SCB upload using the SCB channel's
307 * auto array entry copy feature may
308 * corrupt data. This appears to only
309 * occur on 66MHz systems.
310 */
311 AHC_SCBCHAN_UPLOAD_BUG = 0x40
312 } ahc_bug;
313
314 /*
315 * Configuration specific settings.
316 * The driver determines these settings by probing the
317 * chip/controller's configuration.
318 */
319 typedef enum {
320 AHC_FNONE = 0x000,
321 AHC_PRIMARY_CHANNEL = 0x003, /*
322 * The channel that should
323 * be probed first.
324 */
325 AHC_USEDEFAULTS = 0x004, /*
326 * For cards without an seeprom
327 * or a BIOS to initialize the chip's
328 * SRAM, we use the default target
329 * settings.
330 */
331 AHC_SEQUENCER_DEBUG = 0x008,
332 AHC_SHARED_SRAM = 0x010,
333 AHC_LARGE_SEEPROM = 0x020, /* Uses C56_66 not C46 */
334 AHC_RESET_BUS_A = 0x040,
335 AHC_RESET_BUS_B = 0x080,
336 AHC_EXTENDED_TRANS_A = 0x100,
337 AHC_EXTENDED_TRANS_B = 0x200,
338 AHC_TERM_ENB_A = 0x400,
339 AHC_TERM_ENB_B = 0x800,
340 AHC_INITIATORROLE = 0x1000, /*
341 * Allow initiator operations on
342 * this controller.
343 */
344 AHC_TARGETROLE = 0x2000, /*
345 * Allow target operations on this
346 * controller.
347 */
348 AHC_NEWEEPROM_FMT = 0x4000,
349 AHC_TQINFIFO_BLOCKED = 0x10000, /* Blocked waiting for ATIOs */
350 AHC_INT50_SPEEDFLEX = 0x20000, /*
351 * Internal 50pin connector
352 * sits behind an aic3860
353 */
354 AHC_SCB_BTT = 0x40000, /*
355 * The busy targets table is
356 * stored in SCB space rather
357 * than SRAM.
358 */
359 AHC_BIOS_ENABLED = 0x80000,
360 AHC_ALL_INTERRUPTS = 0x100000,
361 AHC_PAGESCBS = 0x400000, /* Enable SCB paging */
362 AHC_EDGE_INTERRUPT = 0x800000, /* Device uses edge triggered ints */
363 AHC_39BIT_ADDRESSING = 0x1000000, /* Use 39 bit addressing scheme. */
364 AHC_LSCBS_ENABLED = 0x2000000, /* 64Byte SCBs enabled */
365 AHC_SCB_CONFIG_USED = 0x4000000, /* No SEEPROM but SCB2 had info. */
366 AHC_NO_BIOS_INIT = 0x8000000, /* No BIOS left over settings. */
367 AHC_DISABLE_PCI_PERR = 0x10000000,
368 AHC_HAS_TERM_LOGIC = 0x20000000
369 } ahc_flag;
370
371 /************************* Hardware SCB Definition ***************************/
372
373 /*
374 * The driver keeps up to MAX_SCB scb structures per card in memory. The SCB
375 * consists of a "hardware SCB" mirroring the fields available on the card
376 * and additional information the kernel stores for each transaction.
377 *
378 * To minimize space utilization, a portion of the hardware scb stores
379 * different data during different portions of a SCSI transaction.
380 * As initialized by the host driver for the initiator role, this area
381 * contains the SCSI cdb (or a pointer to the cdb) to be executed. After
382 * the cdb has been presented to the target, this area serves to store
383 * residual transfer information and the SCSI status byte.
384 * For the target role, the contents of this area do not change, but
385 * still serve a different purpose than for the initiator role. See
386 * struct target_data for details.
387 */
388
389 /*
390 * Status information embedded in the shared poriton of
391 * an SCB after passing the cdb to the target. The kernel
392 * driver will only read this data for transactions that
393 * complete abnormally (non-zero status byte).
394 */
395 struct status_pkt {
396 uint32_t residual_datacnt; /* Residual in the current S/G seg */
397 uint32_t residual_sg_ptr; /* The next S/G for this transfer */
398 uint8_t scsi_status; /* Standard SCSI status byte */
399 };
400
401 /*
402 * Target mode version of the shared data SCB segment.
403 */
404 struct target_data {
405 uint32_t residual_datacnt; /* Residual in the current S/G seg */
406 uint32_t residual_sg_ptr; /* The next S/G for this transfer */
407 uint8_t scsi_status; /* SCSI status to give to initiator */
408 uint8_t target_phases; /* Bitmap of phases to execute */
409 uint8_t data_phase; /* Data-In or Data-Out */
410 uint8_t initiator_tag; /* Initiator's transaction tag */
411 };
412
413 struct hardware_scb {
414 /*0*/ union {
415 /*
416 * If the cdb is 12 bytes or less, we embed it directly
417 * in the SCB. For longer cdbs, we embed the address
418 * of the cdb payload as seen by the chip and a DMA
419 * is used to pull it in.
420 */
421 uint8_t cdb[12];
422 uint32_t cdb_ptr;
423 struct status_pkt status;
424 struct target_data tdata;
425 } shared_data;
426 /*
427 * A word about residuals.
428 * The scb is presented to the sequencer with the dataptr and datacnt
429 * fields initialized to the contents of the first S/G element to
430 * transfer. The sgptr field is initialized to the bus address for
431 * the S/G element that follows the first in the in core S/G array
432 * or'ed with the SG_FULL_RESID flag. Sgptr may point to an invalid
433 * S/G entry for this transfer (single S/G element transfer with the
434 * first elements address and length preloaded in the dataptr/datacnt
435 * fields). If no transfer is to occur, sgptr is set to SG_LIST_NULL.
436 * The SG_FULL_RESID flag ensures that the residual will be correctly
437 * noted even if no data transfers occur. Once the data phase is entered,
438 * the residual sgptr and datacnt are loaded from the sgptr and the
439 * datacnt fields. After each S/G element's dataptr and length are
440 * loaded into the hardware, the residual sgptr is advanced. After
441 * each S/G element is expired, its datacnt field is checked to see
442 * if the LAST_SEG flag is set. If so, SG_LIST_NULL is set in the
443 * residual sg ptr and the transfer is considered complete. If the
444 * sequencer determines that there is a residual in the tranfer, it
445 * will set the SG_RESID_VALID flag in sgptr and dma the scb back into
446 * host memory. To sumarize:
447 *
448 * Sequencer:
449 * o A residual has occurred if SG_FULL_RESID is set in sgptr,
450 * or residual_sgptr does not have SG_LIST_NULL set.
451 *
452 * o We are transfering the last segment if residual_datacnt has
453 * the SG_LAST_SEG flag set.
454 *
455 * Host:
456 * o A residual has occurred if a completed scb has the
457 * SG_RESID_VALID flag set.
458 *
459 * o residual_sgptr and sgptr refer to the "next" sg entry
460 * and so may point beyond the last valid sg entry for the
461 * transfer.
462 */
463 /*12*/ uint32_t dataptr;
464 /*16*/ uint32_t datacnt; /*
465 * Byte 3 (numbered from 0) of
466 * the datacnt is really the
467 * 4th byte in that data address.
468 */
469 /*20*/ uint32_t sgptr;
470 #define SG_PTR_MASK 0xFFFFFFF8
471 /*24*/ uint8_t control; /* See SCB_CONTROL in aic7xxx.reg for details */
472 /*25*/ uint8_t scsiid; /* what to load in the SCSIID register */
473 /*26*/ uint8_t lun;
474 /*27*/ uint8_t tag; /*
475 * Index into our kernel SCB array.
476 * Also used as the tag for tagged I/O
477 */
478 /*28*/ uint8_t cdb_len;
479 /*29*/ uint8_t scsirate; /* Value for SCSIRATE register */
480 /*30*/ uint8_t scsioffset; /* Value for SCSIOFFSET register */
481 /*31*/ uint8_t next; /*
482 * Used for threading SCBs in the
483 * "Waiting for Selection" and
484 * "Disconnected SCB" lists down
485 * in the sequencer.
486 */
487 /*32*/ uint8_t cdb32[32]; /*
488 * CDB storage for cdbs of size
489 * 13->32. We store them here
490 * because hardware scbs are
491 * allocated from DMA safe
492 * memory so we are guaranteed
493 * the controller can access
494 * this data.
495 */
496 };
497
498 /************************ Kernel SCB Definitions ******************************/
499 /*
500 * Some fields of the SCB are OS dependent. Here we collect the
501 * definitions for elements that all OS platforms need to include
502 * in there SCB definition.
503 */
504
505 /*
506 * Definition of a scatter/gather element as transfered to the controller.
507 * The aic7xxx chips only support a 24bit length. We use the top byte of
508 * the length to store additional address bits and a flag to indicate
509 * that a given segment terminates the transfer. This gives us an
510 * addressable range of 512GB on machines with 64bit PCI or with chips
511 * that can support dual address cycles on 32bit PCI busses.
512 */
513 struct ahc_dma_seg {
514 uint32_t addr;
515 uint32_t len;
516 #define AHC_DMA_LAST_SEG 0x80000000
517 #define AHC_SG_HIGH_ADDR_MASK 0x7F000000
518 #define AHC_SG_LEN_MASK 0x00FFFFFF
519 };
520
521 struct sg_map_node {
522 bus_dmamap_t sg_dmamap;
523 dma_addr_t sg_physaddr;
524 struct ahc_dma_seg* sg_vaddr;
525 SLIST_ENTRY(sg_map_node) links;
526 };
527
528 /*
529 * The current state of this SCB.
530 */
531 typedef enum {
532 SCB_FREE = 0x0000,
533 SCB_OTHERTCL_TIMEOUT = 0x0002,/*
534 * Another device was active
535 * during the first timeout for
536 * this SCB so we gave ourselves
537 * an additional timeout period
538 * in case it was hogging the
539 * bus.
540 */
541 SCB_DEVICE_RESET = 0x0004,
542 SCB_SENSE = 0x0008,
543 SCB_CDB32_PTR = 0x0010,
544 SCB_RECOVERY_SCB = 0x0020,
545 SCB_AUTO_NEGOTIATE = 0x0040,/* Negotiate to achieve goal. */
546 SCB_NEGOTIATE = 0x0080,/* Negotiation forced for command. */
547 SCB_ABORT = 0x0100,
548 SCB_UNTAGGEDQ = 0x0200,
549 SCB_ACTIVE = 0x0400,
550 SCB_TARGET_IMMEDIATE = 0x0800,
551 SCB_TRANSMISSION_ERROR = 0x1000,/*
552 * We detected a parity or CRC
553 * error that has effected the
554 * payload of the command. This
555 * flag is checked when normal
556 * status is returned to catch
557 * the case of a target not
558 * responding to our attempt
559 * to report the error.
560 */
561 SCB_TARGET_SCB = 0x2000,
562 SCB_SILENT = 0x4000 /*
563 * Be quiet about transmission type
564 * errors. They are expected and we
565 * don't want to upset the user. This
566 * flag is typically used during DV.
567 */
568 } scb_flag;
569
570 struct scb {
571 struct hardware_scb *hscb;
572 union {
573 SLIST_ENTRY(scb) sle;
574 TAILQ_ENTRY(scb) tqe;
575 } links;
576 LIST_ENTRY(scb) pending_links;
577 ahc_io_ctx_t io_ctx;
578 struct ahc_softc *ahc_softc;
579 scb_flag flags;
580 #ifndef __linux__
581 bus_dmamap_t dmamap;
582 #endif
583 struct scb_platform_data *platform_data;
584 struct sg_map_node *sg_map;
585 struct ahc_dma_seg *sg_list;
586 dma_addr_t sg_list_phys;
587 u_int sg_count;/* How full ahc_dma_seg is */
588 };
589
590 struct scb_data {
591 SLIST_HEAD(, scb) free_scbs; /*
592 * Pool of SCBs ready to be assigned
593 * commands to execute.
594 */
595 struct scb *scbindex[256]; /*
596 * Mapping from tag to SCB.
597 * As tag identifiers are an
598 * 8bit value, we provide space
599 * for all possible tag values.
600 * Any lookups to entries at or
601 * above AHC_SCB_MAX_ALLOC will
602 * always fail.
603 */
604 struct hardware_scb *hscbs; /* Array of hardware SCBs */
605 struct scb *scbarray; /* Array of kernel SCBs */
606 struct scsi_sense_data *sense; /* Per SCB sense data */
607
608 /*
609 * "Bus" addresses of our data structures.
610 */
611 bus_dma_tag_t hscb_dmat; /* dmat for our hardware SCB array */
612 bus_dmamap_t hscb_dmamap;
613 dma_addr_t hscb_busaddr;
614 bus_dma_tag_t sense_dmat;
615 bus_dmamap_t sense_dmamap;
616 dma_addr_t sense_busaddr;
617 bus_dma_tag_t sg_dmat; /* dmat for our sg segments */
618 SLIST_HEAD(, sg_map_node) sg_maps;
619 uint8_t numscbs;
620 uint8_t maxhscbs; /* Number of SCBs on the card */
621 uint8_t init_level; /*
622 * How far we've initialized
623 * this structure.
624 */
625 };
626
627 /************************ Target Mode Definitions *****************************/
628
629 /*
630 * Connection desciptor for select-in requests in target mode.
631 */
632 struct target_cmd {
633 uint8_t scsiid; /* Our ID and the initiator's ID */
634 uint8_t identify; /* Identify message */
635 uint8_t bytes[22]; /*
636 * Bytes contains any additional message
637 * bytes terminated by 0xFF. The remainder
638 * is the cdb to execute.
639 */
640 uint8_t cmd_valid; /*
641 * When a command is complete, the firmware
642 * will set cmd_valid to all bits set.
643 * After the host has seen the command,
644 * the bits are cleared. This allows us
645 * to just peek at host memory to determine
646 * if more work is complete. cmd_valid is on
647 * an 8 byte boundary to simplify setting
648 * it on aic7880 hardware which only has
649 * limited direct access to the DMA FIFO.
650 */
651 uint8_t pad[7];
652 };
653
654 /*
655 * Number of events we can buffer up if we run out
656 * of immediate notify ccbs.
657 */
658 #define AHC_TMODE_EVENT_BUFFER_SIZE 8
659 struct ahc_tmode_event {
660 uint8_t initiator_id;
661 uint8_t event_type; /* MSG type or EVENT_TYPE_BUS_RESET */
662 #define EVENT_TYPE_BUS_RESET 0xFF
663 uint8_t event_arg;
664 };
665
666 /*
667 * Per enabled lun target mode state.
668 * As this state is directly influenced by the host OS'es target mode
669 * environment, we let the OS module define it. Forward declare the
670 * structure here so we can store arrays of them, etc. in OS neutral
671 * data structures.
672 */
673 #ifdef AHC_TARGET_MODE
674 struct ahc_tmode_lstate {
675 struct cam_path *path;
676 struct ccb_hdr_slist accept_tios;
677 struct ccb_hdr_slist immed_notifies;
678 struct ahc_tmode_event event_buffer[AHC_TMODE_EVENT_BUFFER_SIZE];
679 uint8_t event_r_idx;
680 uint8_t event_w_idx;
681 };
682 #else
683 struct ahc_tmode_lstate;
684 #endif
685
686 /******************** Transfer Negotiation Datastructures *********************/
687 #define AHC_TRANS_CUR 0x01 /* Modify current neogtiation status */
688 #define AHC_TRANS_ACTIVE 0x03 /* Assume this target is on the bus */
689 #define AHC_TRANS_GOAL 0x04 /* Modify negotiation goal */
690 #define AHC_TRANS_USER 0x08 /* Modify user negotiation settings */
691
692 #define AHC_WIDTH_UNKNOWN 0xFF
693 #define AHC_PERIOD_UNKNOWN 0xFF
694 #define AHC_OFFSET_UNKNOWN 0xFF
695 #define AHC_PPR_OPTS_UNKNOWN 0xFF
696
697 /*
698 * Transfer Negotiation Information.
699 */
700 struct ahc_transinfo {
701 uint8_t protocol_version; /* SCSI Revision level */
702 uint8_t transport_version; /* SPI Revision level */
703 uint8_t width; /* Bus width */
704 uint8_t period; /* Sync rate factor */
705 uint8_t offset; /* Sync offset */
706 uint8_t ppr_options; /* Parallel Protocol Request options */
707 };
708
709 /*
710 * Per-initiator current, goal and user transfer negotiation information. */
711 struct ahc_initiator_tinfo {
712 uint8_t scsirate; /* Computed value for SCSIRATE reg */
713 struct ahc_transinfo curr;
714 struct ahc_transinfo goal;
715 struct ahc_transinfo user;
716 };
717
718 /*
719 * Per enabled target ID state.
720 * Pointers to lun target state as well as sync/wide negotiation information
721 * for each initiator<->target mapping. For the initiator role we pretend
722 * that we are the target and the targets are the initiators since the
723 * negotiation is the same regardless of role.
724 */
725 struct ahc_tmode_tstate {
726 struct ahc_tmode_lstate* enabled_luns[AHC_NUM_LUNS];
727 struct ahc_initiator_tinfo transinfo[AHC_NUM_TARGETS];
728
729 /*
730 * Per initiator state bitmasks.
731 */
732 uint16_t auto_negotiate;/* Auto Negotiation Required */
733 uint16_t ultraenb; /* Using ultra sync rate */
734 uint16_t discenable; /* Disconnection allowed */
735 uint16_t tagenable; /* Tagged Queuing allowed */
736 };
737
738 /*
739 * Data structure for our table of allowed synchronous transfer rates.
740 */
741 struct ahc_syncrate {
742 u_int sxfr_u2; /* Value of the SXFR parameter for Ultra2+ Chips */
743 u_int sxfr; /* Value of the SXFR parameter for <= Ultra Chips */
744 #define ULTRA_SXFR 0x100 /* Rate Requires Ultra Mode set */
745 #define ST_SXFR 0x010 /* Rate Single Transition Only */
746 #define DT_SXFR 0x040 /* Rate Double Transition Only */
747 uint8_t period; /* Period to send to SCSI target */
748 char *rate;
749 };
750
751 /* Safe and valid period for async negotiations. */
752 #define AHC_ASYNC_XFER_PERIOD 0x45
753 #define AHC_ULTRA2_XFER_PERIOD 0x0a
754
755 /*
756 * Indexes into our table of syncronous transfer rates.
757 */
758 #define AHC_SYNCRATE_DT 0
759 #define AHC_SYNCRATE_ULTRA2 1
760 #define AHC_SYNCRATE_ULTRA 3
761 #define AHC_SYNCRATE_FAST 6
762 #define AHC_SYNCRATE_MAX AHC_SYNCRATE_DT
763 #define AHC_SYNCRATE_MIN 13
764
765 /***************************** Lookup Tables **********************************/
766 /*
767 * Phase -> name and message out response
768 * to parity errors in each phase table.
769 */
770 struct ahc_phase_table_entry {
771 uint8_t phase;
772 uint8_t mesg_out; /* Message response to parity errors */
773 char *phasemsg;
774 };
775
776 /************************** Serial EEPROM Format ******************************/
777
778 struct seeprom_config {
779 /*
780 * Per SCSI ID Configuration Flags
781 */
782 uint16_t device_flags[16]; /* words 0-15 */
783 #define CFXFER 0x0007 /* synchronous transfer rate */
784 #define CFSYNCH 0x0008 /* enable synchronous transfer */
785 #define CFDISC 0x0010 /* enable disconnection */
786 #define CFWIDEB 0x0020 /* wide bus device */
787 #define CFSYNCHISULTRA 0x0040 /* CFSYNCH is an ultra offset (2940AU)*/
788 #define CFSYNCSINGLE 0x0080 /* Single-Transition signalling */
789 #define CFSTART 0x0100 /* send start unit SCSI command */
790 #define CFINCBIOS 0x0200 /* include in BIOS scan */
791 #define CFRNFOUND 0x0400 /* report even if not found */
792 #define CFMULTILUNDEV 0x0800 /* Probe multiple luns in BIOS scan */
793 #define CFWBCACHEENB 0x4000 /* Enable W-Behind Cache on disks */
794 #define CFWBCACHENOP 0xc000 /* Don't touch W-Behind Cache */
795
796 /*
797 * BIOS Control Bits
798 */
799 uint16_t bios_control; /* word 16 */
800 #define CFSUPREM 0x0001 /* support all removeable drives */
801 #define CFSUPREMB 0x0002 /* support removeable boot drives */
802 #define CFBIOSEN 0x0004 /* BIOS enabled */
803 #define CFBIOS_BUSSCAN 0x0008 /* Have the BIOS Scan the Bus */
804 #define CFSM2DRV 0x0010 /* support more than two drives */
805 #define CFSTPWLEVEL 0x0010 /* Termination level control */
806 #define CF284XEXTEND 0x0020 /* extended translation (284x cards) */
807 #define CFCTRL_A 0x0020 /* BIOS displays Ctrl-A message */
808 #define CFTERM_MENU 0x0040 /* BIOS displays termination menu */
809 #define CFEXTEND 0x0080 /* extended translation enabled */
810 #define CFSCAMEN 0x0100 /* SCAM enable */
811 #define CFMSG_LEVEL 0x0600 /* BIOS Message Level */
812 #define CFMSG_VERBOSE 0x0000
813 #define CFMSG_SILENT 0x0200
814 #define CFMSG_DIAG 0x0400
815 #define CFBOOTCD 0x0800 /* Support Bootable CD-ROM */
816 /* UNUSED 0xff00 */
817
818 /*
819 * Host Adapter Control Bits
820 */
821 uint16_t adapter_control; /* word 17 */
822 #define CFAUTOTERM 0x0001 /* Perform Auto termination */
823 #define CFULTRAEN 0x0002 /* Ultra SCSI speed enable */
824 #define CF284XSELTO 0x0003 /* Selection timeout (284x cards) */
825 #define CF284XFIFO 0x000C /* FIFO Threshold (284x cards) */
826 #define CFSTERM 0x0004 /* SCSI low byte termination */
827 #define CFWSTERM 0x0008 /* SCSI high byte termination */
828 #define CFSPARITY 0x0010 /* SCSI parity */
829 #define CF284XSTERM 0x0020 /* SCSI low byte term (284x cards) */
830 #define CFMULTILUN 0x0020
831 #define CFRESETB 0x0040 /* reset SCSI bus at boot */
832 #define CFCLUSTERENB 0x0080 /* Cluster Enable */
833 #define CFBOOTCHAN 0x0300 /* probe this channel first */
834 #define CFBOOTCHANSHIFT 8
835 #define CFSEAUTOTERM 0x0400 /* Ultra2 Perform secondary Auto Term*/
836 #define CFSELOWTERM 0x0800 /* Ultra2 secondary low term */
837 #define CFSEHIGHTERM 0x1000 /* Ultra2 secondary high term */
838 #define CFENABLEDV 0x4000 /* Perform Domain Validation*/
839
840 /*
841 * Bus Release Time, Host Adapter ID
842 */
843 uint16_t brtime_id; /* word 18 */
844 #define CFSCSIID 0x000f /* host adapter SCSI ID */
845 /* UNUSED 0x00f0 */
846 #define CFBRTIME 0xff00 /* bus release time */
847
848 /*
849 * Maximum targets
850 */
851 uint16_t max_targets; /* word 19 */
852 #define CFMAXTARG 0x00ff /* maximum targets */
853 #define CFBOOTLUN 0x0f00 /* Lun to boot from */
854 #define CFBOOTID 0xf000 /* Target to boot from */
855 uint16_t res_1[10]; /* words 20-29 */
856 uint16_t signature; /* Signature == 0x250 */
857 #define CFSIGNATURE 0x250
858 #define CFSIGNATURE2 0x300
859 uint16_t checksum; /* word 31 */
860 };
861
862 /**************************** Message Buffer *********************************/
863 typedef enum {
864 MSG_TYPE_NONE = 0x00,
865 MSG_TYPE_INITIATOR_MSGOUT = 0x01,
866 MSG_TYPE_INITIATOR_MSGIN = 0x02,
867 MSG_TYPE_TARGET_MSGOUT = 0x03,
868 MSG_TYPE_TARGET_MSGIN = 0x04
869 } ahc_msg_type;
870
871 typedef enum {
872 MSGLOOP_IN_PROG,
873 MSGLOOP_MSGCOMPLETE,
874 MSGLOOP_TERMINATED
875 } msg_loop_stat;
876
877 /*********************** Software Configuration Structure *********************/
878 TAILQ_HEAD(scb_tailq, scb);
879
880 struct ahc_aic7770_softc {
881 /*
882 * Saved register state used for chip_init().
883 */
884 uint8_t busspd;
885 uint8_t bustime;
886 };
887
888 struct ahc_pci_softc {
889 /*
890 * Saved register state used for chip_init().
891 */
892 uint32_t devconfig;
893 uint16_t targcrccnt;
894 uint8_t command;
895 uint8_t csize_lattime;
896 uint8_t optionmode;
897 uint8_t crccontrol1;
898 uint8_t dscommand0;
899 uint8_t dspcistatus;
900 uint8_t scbbaddr;
901 uint8_t dff_thrsh;
902 };
903
904 union ahc_bus_softc {
905 struct ahc_aic7770_softc aic7770_softc;
906 struct ahc_pci_softc pci_softc;
907 };
908
909 typedef void (*ahc_bus_intr_t)(struct ahc_softc *);
910 typedef int (*ahc_bus_chip_init_t)(struct ahc_softc *);
911 typedef int (*ahc_bus_suspend_t)(struct ahc_softc *);
912 typedef int (*ahc_bus_resume_t)(struct ahc_softc *);
913 typedef void ahc_callback_t (void *);
914
915 struct ahc_softc {
916 bus_space_tag_t tag;
917 bus_space_handle_t bsh;
918 #ifndef __linux__
919 bus_dma_tag_t buffer_dmat; /* dmat for buffer I/O */
920 #endif
921 struct scb_data *scb_data;
922
923 struct scb *next_queued_scb;
924
925 /*
926 * SCBs that have been sent to the controller
927 */
928 LIST_HEAD(, scb) pending_scbs;
929
930 /*
931 * Counting lock for deferring the release of additional
932 * untagged transactions from the untagged_queues. When
933 * the lock is decremented to 0, all queues in the
934 * untagged_queues array are run.
935 */
936 u_int untagged_queue_lock;
937
938 /*
939 * Per-target queue of untagged-transactions. The
940 * transaction at the head of the queue is the
941 * currently pending untagged transaction for the
942 * target. The driver only allows a single untagged
943 * transaction per target.
944 */
945 struct scb_tailq untagged_queues[AHC_NUM_TARGETS];
946
947 /*
948 * Bus attachment specific data.
949 */
950 union ahc_bus_softc bus_softc;
951
952 /*
953 * Platform specific data.
954 */
955 struct ahc_platform_data *platform_data;
956
957 /*
958 * Platform specific device information.
959 */
960 ahc_dev_softc_t dev_softc;
961
962 /*
963 * Bus specific device information.
964 */
965 ahc_bus_intr_t bus_intr;
966
967 /*
968 * Bus specific initialization required
969 * after a chip reset.
970 */
971 ahc_bus_chip_init_t bus_chip_init;
972
973 /*
974 * Bus specific suspend routine.
975 */
976 ahc_bus_suspend_t bus_suspend;
977
978 /*
979 * Bus specific resume routine.
980 */
981 ahc_bus_resume_t bus_resume;
982
983 /*
984 * Target mode related state kept on a per enabled lun basis.
985 * Targets that are not enabled will have null entries.
986 * As an initiator, we keep one target entry for our initiator
987 * ID to store our sync/wide transfer settings.
988 */
989 struct ahc_tmode_tstate *enabled_targets[AHC_NUM_TARGETS];
990
991 /*
992 * The black hole device responsible for handling requests for
993 * disabled luns on enabled targets.
994 */
995 struct ahc_tmode_lstate *black_hole;
996
997 /*
998 * Device instance currently on the bus awaiting a continue TIO
999 * for a command that was not given the disconnect priveledge.
1000 */
1001 struct ahc_tmode_lstate *pending_device;
1002
1003 /*
1004 * Card characteristics
1005 */
1006 ahc_chip chip;
1007 ahc_feature features;
1008 ahc_bug bugs;
1009 ahc_flag flags;
1010 struct seeprom_config *seep_config;
1011
1012 /* Values to store in the SEQCTL register for pause and unpause */
1013 uint8_t unpause;
1014 uint8_t pause;
1015
1016 /* Command Queues */
1017 uint8_t qoutfifonext;
1018 uint8_t qinfifonext;
1019 uint8_t *qoutfifo;
1020 uint8_t *qinfifo;
1021
1022 /* Critical Section Data */
1023 struct cs *critical_sections;
1024 u_int num_critical_sections;
1025
1026 /* Channel Names ('A', 'B', etc.) */
1027 char channel;
1028 char channel_b;
1029
1030 /* Initiator Bus ID */
1031 uint8_t our_id;
1032 uint8_t our_id_b;
1033
1034 /*
1035 * PCI error detection.
1036 */
1037 int unsolicited_ints;
1038
1039 /*
1040 * Target incoming command FIFO.
1041 */
1042 struct target_cmd *targetcmds;
1043 uint8_t tqinfifonext;
1044
1045 /*
1046 * Cached copy of the sequencer control register.
1047 */
1048 uint8_t seqctl;
1049
1050 /*
1051 * Incoming and outgoing message handling.
1052 */
1053 uint8_t send_msg_perror;
1054 ahc_msg_type msg_type;
1055 uint8_t msgout_buf[12];/* Message we are sending */
1056 uint8_t msgin_buf[12];/* Message we are receiving */
1057 u_int msgout_len; /* Length of message to send */
1058 u_int msgout_index; /* Current index in msgout */
1059 u_int msgin_index; /* Current index in msgin */
1060
1061 /*
1062 * Mapping information for data structures shared
1063 * between the sequencer and kernel.
1064 */
1065 bus_dma_tag_t parent_dmat;
1066 bus_dma_tag_t shared_data_dmat;
1067 bus_dmamap_t shared_data_dmamap;
1068 dma_addr_t shared_data_busaddr;
1069
1070 /*
1071 * Bus address of the one byte buffer used to
1072 * work-around a DMA bug for chips <= aic7880
1073 * in target mode.
1074 */
1075 dma_addr_t dma_bug_buf;
1076
1077 /* Number of enabled target mode device on this card */
1078 u_int enabled_luns;
1079
1080 /* Initialization level of this data structure */
1081 u_int init_level;
1082
1083 /* PCI cacheline size. */
1084 u_int pci_cachesize;
1085
1086 /*
1087 * Count of parity errors we have seen as a target.
1088 * We auto-disable parity error checking after seeing
1089 * AHC_PCI_TARGET_PERR_THRESH number of errors.
1090 */
1091 u_int pci_target_perr_count;
1092 #define AHC_PCI_TARGET_PERR_THRESH 10
1093
1094 /* Maximum number of sequencer instructions supported. */
1095 u_int instruction_ram_size;
1096
1097 /* Per-Unit descriptive information */
1098 const char *description;
1099 char *name;
1100 int unit;
1101
1102 /* Selection Timer settings */
1103 int seltime;
1104 int seltime_b;
1105
1106 uint16_t user_discenable;/* Disconnection allowed */
1107 uint16_t user_tagenable;/* Tagged Queuing allowed */
1108 };
1109
1110 /************************ Active Device Information ***************************/
1111 typedef enum {
1112 ROLE_UNKNOWN,
1113 ROLE_INITIATOR,
1114 ROLE_TARGET
1115 } role_t;
1116
1117 struct ahc_devinfo {
1118 int our_scsiid;
1119 int target_offset;
1120 uint16_t target_mask;
1121 u_int target;
1122 u_int lun;
1123 char channel;
1124 role_t role; /*
1125 * Only guaranteed to be correct if not
1126 * in the busfree state.
1127 */
1128 };
1129
1130 /****************************** PCI Structures ********************************/
1131 typedef int (ahc_device_setup_t)(struct ahc_softc *);
1132
1133 struct ahc_pci_identity {
1134 uint64_t full_id;
1135 uint64_t id_mask;
1136 char *name;
1137 ahc_device_setup_t *setup;
1138 };
1139 extern struct ahc_pci_identity ahc_pci_ident_table[];
1140 extern const u_int ahc_num_pci_devs;
1141
1142 /***************************** VL/EISA Declarations ***************************/
1143 struct aic7770_identity {
1144 uint32_t full_id;
1145 uint32_t id_mask;
1146 const char *name;
1147 ahc_device_setup_t *setup;
1148 };
1149 extern struct aic7770_identity aic7770_ident_table[];
1150 extern const int ahc_num_aic7770_devs;
1151
1152 #define AHC_EISA_SLOT_OFFSET 0xc00
1153 #define AHC_EISA_IOSIZE 0x100
1154
1155 /*************************** Function Declarations ****************************/
1156 /******************************************************************************/
1157 u_int ahc_index_busy_tcl(struct ahc_softc *ahc, u_int tcl);
1158 void ahc_unbusy_tcl(struct ahc_softc *ahc, u_int tcl);
1159 void ahc_busy_tcl(struct ahc_softc *ahc,
1160 u_int tcl, u_int busyid);
1161
1162 /***************************** PCI Front End *********************************/
1163 struct ahc_pci_identity *ahc_find_pci_device(ahc_dev_softc_t);
1164 int ahc_pci_config(struct ahc_softc *,
1165 struct ahc_pci_identity *);
1166 int ahc_pci_test_register_access(struct ahc_softc *);
1167
1168 /*************************** EISA/VL Front End ********************************/
1169 struct aic7770_identity *aic7770_find_device(uint32_t);
1170 int aic7770_config(struct ahc_softc *ahc,
1171 struct aic7770_identity *,
1172 u_int port);
1173
1174 /************************** SCB and SCB queue management **********************/
1175 int ahc_probe_scbs(struct ahc_softc *);
1176 void ahc_run_untagged_queues(struct ahc_softc *ahc);
1177 void ahc_run_untagged_queue(struct ahc_softc *ahc,
1178 struct scb_tailq *queue);
1179 void ahc_qinfifo_requeue_tail(struct ahc_softc *ahc,
1180 struct scb *scb);
1181 int ahc_match_scb(struct ahc_softc *ahc, struct scb *scb,
1182 int target, char channel, int lun,
1183 u_int tag, role_t role);
1184
1185 /****************************** Initialization ********************************/
1186 struct ahc_softc *ahc_alloc(void *platform_arg, char *name);
1187 int ahc_softc_init(struct ahc_softc *);
1188 void ahc_controller_info(struct ahc_softc *ahc, char *buf);
1189 int ahc_chip_init(struct ahc_softc *ahc);
1190 int ahc_init(struct ahc_softc *ahc);
1191 void ahc_intr_enable(struct ahc_softc *ahc, int enable);
1192 void ahc_pause_and_flushwork(struct ahc_softc *ahc);
1193 int ahc_suspend(struct ahc_softc *ahc);
1194 int ahc_resume(struct ahc_softc *ahc);
1195 void ahc_set_unit(struct ahc_softc *, int);
1196 void ahc_set_name(struct ahc_softc *, char *);
1197 void ahc_alloc_scbs(struct ahc_softc *ahc);
1198 void ahc_free(struct ahc_softc *ahc);
1199 int ahc_reset(struct ahc_softc *ahc, int reinit);
1200 void ahc_shutdown(void *arg);
1201
1202 /*************************** Interrupt Services *******************************/
1203 void ahc_clear_intstat(struct ahc_softc *ahc);
1204 void ahc_run_qoutfifo(struct ahc_softc *ahc);
1205 #ifdef AHC_TARGET_MODE
1206 void ahc_run_tqinfifo(struct ahc_softc *ahc, int paused);
1207 #endif
1208 void ahc_handle_brkadrint(struct ahc_softc *ahc);
1209 void ahc_handle_seqint(struct ahc_softc *ahc, u_int intstat);
1210 void ahc_handle_scsiint(struct ahc_softc *ahc,
1211 u_int intstat);
1212 void ahc_clear_critical_section(struct ahc_softc *ahc);
1213
1214 /***************************** Error Recovery *********************************/
1215 typedef enum {
1216 SEARCH_COMPLETE,
1217 SEARCH_COUNT,
1218 SEARCH_REMOVE
1219 } ahc_search_action;
1220 int ahc_search_qinfifo(struct ahc_softc *ahc, int target,
1221 char channel, int lun, u_int tag,
1222 role_t role, uint32_t status,
1223 ahc_search_action action);
1224 int ahc_search_untagged_queues(struct ahc_softc *ahc,
1225 ahc_io_ctx_t ctx,
1226 int target, char channel,
1227 int lun, uint32_t status,
1228 ahc_search_action action);
1229 int ahc_search_disc_list(struct ahc_softc *ahc, int target,
1230 char channel, int lun, u_int tag,
1231 int stop_on_first, int remove,
1232 int save_state);
1233 void ahc_freeze_devq(struct ahc_softc *ahc, struct scb *scb);
1234 int ahc_reset_channel(struct ahc_softc *ahc, char channel,
1235 int initiate_reset);
1236 int ahc_abort_scbs(struct ahc_softc *ahc, int target,
1237 char channel, int lun, u_int tag,
1238 role_t role, uint32_t status);
1239 void ahc_restart(struct ahc_softc *ahc);
1240 void ahc_calc_residual(struct ahc_softc *ahc,
1241 struct scb *scb);
1242 /*************************** Utility Functions ********************************/
1243 struct ahc_phase_table_entry*
1244 ahc_lookup_phase_entry(int phase);
1245 void ahc_compile_devinfo(struct ahc_devinfo *devinfo,
1246 u_int our_id, u_int target,
1247 u_int lun, char channel,
1248 role_t role);
1249 /************************** Transfer Negotiation ******************************/
1250 struct ahc_syncrate* ahc_find_syncrate(struct ahc_softc *ahc, u_int *period,
1251 u_int *ppr_options, u_int maxsync);
1252 u_int ahc_find_period(struct ahc_softc *ahc,
1253 u_int scsirate, u_int maxsync);
1254 void ahc_validate_offset(struct ahc_softc *ahc,
1255 struct ahc_initiator_tinfo *tinfo,
1256 struct ahc_syncrate *syncrate,
1257 u_int *offset, int wide,
1258 role_t role);
1259 void ahc_validate_width(struct ahc_softc *ahc,
1260 struct ahc_initiator_tinfo *tinfo,
1261 u_int *bus_width,
1262 role_t role);
1263 /*
1264 * Negotiation types. These are used to qualify if we should renegotiate
1265 * even if our goal and current transport parameters are identical.
1266 */
1267 typedef enum {
1268 AHC_NEG_TO_GOAL, /* Renegotiate only if goal and curr differ. */
1269 AHC_NEG_IF_NON_ASYNC, /* Renegotiate so long as goal is non-async. */
1270 AHC_NEG_ALWAYS /* Renegotiat even if goal is async. */
1271 } ahc_neg_type;
1272 int ahc_update_neg_request(struct ahc_softc*,
1273 struct ahc_devinfo*,
1274 struct ahc_tmode_tstate*,
1275 struct ahc_initiator_tinfo*,
1276 ahc_neg_type);
1277 void ahc_set_width(struct ahc_softc *ahc,
1278 struct ahc_devinfo *devinfo,
1279 u_int width, u_int type, int paused);
1280 void ahc_set_syncrate(struct ahc_softc *ahc,
1281 struct ahc_devinfo *devinfo,
1282 struct ahc_syncrate *syncrate,
1283 u_int period, u_int offset,
1284 u_int ppr_options,
1285 u_int type, int paused);
1286 typedef enum {
1287 AHC_QUEUE_NONE,
1288 AHC_QUEUE_BASIC,
1289 AHC_QUEUE_TAGGED
1290 } ahc_queue_alg;
1291
1292 void ahc_set_tags(struct ahc_softc *ahc,
1293 struct ahc_devinfo *devinfo,
1294 ahc_queue_alg alg);
1295
1296 /**************************** Target Mode *************************************/
1297 #ifdef AHC_TARGET_MODE
1298 void ahc_send_lstate_events(struct ahc_softc *,
1299 struct ahc_tmode_lstate *);
1300 void ahc_handle_en_lun(struct ahc_softc *ahc,
1301 struct cam_sim *sim, union ccb *ccb);
1302 cam_status ahc_find_tmode_devs(struct ahc_softc *ahc,
1303 struct cam_sim *sim, union ccb *ccb,
1304 struct ahc_tmode_tstate **tstate,
1305 struct ahc_tmode_lstate **lstate,
1306 int notfound_failure);
1307 #ifndef AHC_TMODE_ENABLE
1308 #define AHC_TMODE_ENABLE 0
1309 #endif
1310 #endif
1311 /******************************* Debug ***************************************/
1312 #ifdef AHC_DEBUG
1313 extern uint32_t ahc_debug;
1314 #define AHC_SHOW_MISC 0x0001
1315 #define AHC_SHOW_SENSE 0x0002
1316 #define AHC_DUMP_SEEPROM 0x0004
1317 #define AHC_SHOW_TERMCTL 0x0008
1318 #define AHC_SHOW_MEMORY 0x0010
1319 #define AHC_SHOW_MESSAGES 0x0020
1320 #define AHC_SHOW_DV 0x0040
1321 #define AHC_SHOW_SELTO 0x0080
1322 #define AHC_SHOW_QFULL 0x0200
1323 #define AHC_SHOW_QUEUE 0x0400
1324 #define AHC_SHOW_TQIN 0x0800
1325 #define AHC_SHOW_MASKED_ERRORS 0x1000
1326 #define AHC_DEBUG_SEQUENCER 0x2000
1327 #endif
1328 void ahc_print_scb(struct scb *scb);
1329 void ahc_print_devinfo(struct ahc_softc *ahc,
1330 struct ahc_devinfo *dev);
1331 void ahc_dump_card_state(struct ahc_softc *ahc);
1332 int ahc_print_register(ahc_reg_parse_entry_t *table,
1333 u_int num_entries,
1334 const char *name,
1335 u_int address,
1336 u_int value,
1337 u_int *cur_column,
1338 u_int wrap_point);
1339 /******************************* SEEPROM *************************************/
1340 int ahc_acquire_seeprom(struct ahc_softc *ahc,
1341 struct seeprom_descriptor *sd);
1342 void ahc_release_seeprom(struct seeprom_descriptor *sd);
1343 #endif /* _AIC7XXX_H_ */
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