xref: /openbmc/linux/drivers/scsi/aic7xxx/aic79xx.h (revision 1f9f22ac)
1 /*
2  * Core definitions and data structures shareable across OS platforms.
3  *
4  * Copyright (c) 1994-2002 Justin T. Gibbs.
5  * Copyright (c) 2000-2002 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/aic79xx.h#109 $
41  *
42  * $FreeBSD$
43  */
44 
45 #ifndef _AIC79XX_H_
46 #define _AIC79XX_H_
47 
48 /* Register Definitions */
49 #include "aic79xx_reg.h"
50 
51 /************************* Forward Declarations *******************************/
52 struct ahd_platform_data;
53 struct scb_platform_data;
54 
55 /****************************** Useful Macros *********************************/
56 #ifndef TRUE
57 #define TRUE 1
58 #endif
59 #ifndef FALSE
60 #define FALSE 0
61 #endif
62 
63 #define ALL_CHANNELS '\0'
64 #define ALL_TARGETS_MASK 0xFFFF
65 #define INITIATOR_WILDCARD	(~0)
66 #define	SCB_LIST_NULL		0xFF00
67 #define	SCB_LIST_NULL_LE	(ahd_htole16(SCB_LIST_NULL))
68 #define QOUTFIFO_ENTRY_VALID 0x80
69 #define SCBID_IS_NULL(scbid) (((scbid) & 0xFF00 ) == SCB_LIST_NULL)
70 
71 #define SCSIID_TARGET(ahd, scsiid)	\
72 	(((scsiid) & TID) >> TID_SHIFT)
73 #define SCSIID_OUR_ID(scsiid)		\
74 	((scsiid) & OID)
75 #define SCSIID_CHANNEL(ahd, scsiid) ('A')
76 #define	SCB_IS_SCSIBUS_B(ahd, scb) (0)
77 #define	SCB_GET_OUR_ID(scb) \
78 	SCSIID_OUR_ID((scb)->hscb->scsiid)
79 #define	SCB_GET_TARGET(ahd, scb) \
80 	SCSIID_TARGET((ahd), (scb)->hscb->scsiid)
81 #define	SCB_GET_CHANNEL(ahd, scb) \
82 	SCSIID_CHANNEL(ahd, (scb)->hscb->scsiid)
83 #define	SCB_GET_LUN(scb) \
84 	((scb)->hscb->lun)
85 #define SCB_GET_TARGET_OFFSET(ahd, scb)	\
86 	SCB_GET_TARGET(ahd, scb)
87 #define SCB_GET_TARGET_MASK(ahd, scb) \
88 	(0x01 << (SCB_GET_TARGET_OFFSET(ahd, scb)))
89 #ifdef AHD_DEBUG
90 #define SCB_IS_SILENT(scb)					\
91 	((ahd_debug & AHD_SHOW_MASKED_ERRORS) == 0		\
92       && (((scb)->flags & SCB_SILENT) != 0))
93 #else
94 #define SCB_IS_SILENT(scb)					\
95 	(((scb)->flags & SCB_SILENT) != 0)
96 #endif
97 /*
98  * TCLs have the following format: TTTTLLLLLLLL
99  */
100 #define TCL_TARGET_OFFSET(tcl) \
101 	((((tcl) >> 4) & TID) >> 4)
102 #define TCL_LUN(tcl) \
103 	(tcl & (AHD_NUM_LUNS - 1))
104 #define BUILD_TCL(scsiid, lun) \
105 	((lun) | (((scsiid) & TID) << 4))
106 #define BUILD_TCL_RAW(target, channel, lun) \
107 	((lun) | ((target) << 8))
108 
109 #define SCB_GET_TAG(scb) \
110 	ahd_le16toh(scb->hscb->tag)
111 
112 #ifndef	AHD_TARGET_MODE
113 #undef	AHD_TMODE_ENABLE
114 #define	AHD_TMODE_ENABLE 0
115 #endif
116 
117 #define AHD_BUILD_COL_IDX(target, lun)				\
118 	((((u8)lun) << 4) | target)
119 
120 #define AHD_GET_SCB_COL_IDX(ahd, scb)				\
121 	((SCB_GET_LUN(scb) << 4) | SCB_GET_TARGET(ahd, scb))
122 
123 #define AHD_SET_SCB_COL_IDX(scb, col_idx)				\
124 do {									\
125 	(scb)->hscb->scsiid = ((col_idx) << TID_SHIFT) & TID;		\
126 	(scb)->hscb->lun = ((col_idx) >> 4) & (AHD_NUM_LUNS_NONPKT-1);	\
127 } while (0)
128 
129 #define AHD_COPY_SCB_COL_IDX(dst, src)				\
130 do {								\
131 	dst->hscb->scsiid = src->hscb->scsiid;			\
132 	dst->hscb->lun = src->hscb->lun;			\
133 } while (0)
134 
135 #define	AHD_NEVER_COL_IDX 0xFFFF
136 
137 /**************************** Driver Constants ********************************/
138 /*
139  * The maximum number of supported targets.
140  */
141 #define AHD_NUM_TARGETS 16
142 
143 /*
144  * The maximum number of supported luns.
145  * The identify message only supports 64 luns in non-packetized transfers.
146  * You can have 2^64 luns when information unit transfers are enabled,
147  * but until we see a need to support that many, we support 256.
148  */
149 #define AHD_NUM_LUNS_NONPKT 64
150 #define AHD_NUM_LUNS 256
151 
152 /*
153  * The maximum transfer per S/G segment.
154  */
155 #define AHD_MAXTRANSFER_SIZE	 0x00ffffff	/* limited by 24bit counter */
156 
157 /*
158  * The maximum amount of SCB storage in hardware on a controller.
159  * This value represents an upper bound.  Due to software design,
160  * we may not be able to use this number.
161  */
162 #define AHD_SCB_MAX	512
163 
164 /*
165  * The maximum number of concurrent transactions supported per driver instance.
166  * Sequencer Control Blocks (SCBs) store per-transaction information.
167  */
168 #define AHD_MAX_QUEUE	AHD_SCB_MAX
169 
170 /*
171  * Define the size of our QIN and QOUT FIFOs.  They must be a power of 2
172  * in size and accommodate as many transactions as can be queued concurrently.
173  */
174 #define	AHD_QIN_SIZE	AHD_MAX_QUEUE
175 #define	AHD_QOUT_SIZE	AHD_MAX_QUEUE
176 
177 #define AHD_QIN_WRAP(x) ((x) & (AHD_QIN_SIZE-1))
178 /*
179  * The maximum amount of SCB storage we allocate in host memory.
180  */
181 #define AHD_SCB_MAX_ALLOC AHD_MAX_QUEUE
182 
183 /*
184  * Ring Buffer of incoming target commands.
185  * We allocate 256 to simplify the logic in the sequencer
186  * by using the natural wrap point of an 8bit counter.
187  */
188 #define AHD_TMODE_CMDS	256
189 
190 /* Reset line assertion time in us */
191 #define AHD_BUSRESET_DELAY	25
192 
193 /******************* Chip Characteristics/Operating Settings  *****************/
194 /*
195  * Chip Type
196  * The chip order is from least sophisticated to most sophisticated.
197  */
198 typedef enum {
199 	AHD_NONE	= 0x0000,
200 	AHD_CHIPID_MASK	= 0x00FF,
201 	AHD_AIC7901	= 0x0001,
202 	AHD_AIC7902	= 0x0002,
203 	AHD_AIC7901A	= 0x0003,
204 	AHD_PCI		= 0x0100,	/* Bus type PCI */
205 	AHD_PCIX	= 0x0200,	/* Bus type PCIX */
206 	AHD_BUS_MASK	= 0x0F00
207 } ahd_chip;
208 
209 /*
210  * Features available in each chip type.
211  */
212 typedef enum {
213 	AHD_FENONE		= 0x00000,
214 	AHD_WIDE		= 0x00001,/* Wide Channel */
215 	AHD_AIC79XXB_SLOWCRC    = 0x00002,/* SLOWCRC bit should be set */
216 	AHD_MULTI_FUNC		= 0x00100,/* Multi-Function/Channel Device */
217 	AHD_TARGETMODE		= 0x01000,/* Has tested target mode support */
218 	AHD_MULTIROLE		= 0x02000,/* Space for two roles at a time */
219 	AHD_RTI			= 0x04000,/* Retained Training Support */
220 	AHD_NEW_IOCELL_OPTS	= 0x08000,/* More Signal knobs in the IOCELL */
221 	AHD_NEW_DFCNTRL_OPTS	= 0x10000,/* SCSIENWRDIS bit */
222 	AHD_FAST_CDB_DELIVERY	= 0x20000,/* CDB acks released to Output Sync */
223 	AHD_REMOVABLE		= 0x00000,/* Hot-Swap supported - None so far*/
224 	AHD_AIC7901_FE		= AHD_FENONE,
225 	AHD_AIC7901A_FE		= AHD_FENONE,
226 	AHD_AIC7902_FE		= AHD_MULTI_FUNC
227 } ahd_feature;
228 
229 /*
230  * Bugs in the silicon that we work around in software.
231  */
232 typedef enum {
233 	AHD_BUGNONE		= 0x0000,
234 	/*
235 	 * Rev A hardware fails to update LAST/CURR/NEXTSCB
236 	 * correctly in certain packetized selection cases.
237 	 */
238 	AHD_SENT_SCB_UPDATE_BUG	= 0x0001,
239 	/* The wrong SCB is accessed to check the abort pending bit. */
240 	AHD_ABORT_LQI_BUG	= 0x0002,
241 	/* Packetized bitbucket crosses packet boundaries. */
242 	AHD_PKT_BITBUCKET_BUG	= 0x0004,
243 	/* The selection timer runs twice as long as its setting. */
244 	AHD_LONG_SETIMO_BUG	= 0x0008,
245 	/* The Non-LQ CRC error status is delayed until phase change. */
246 	AHD_NLQICRC_DELAYED_BUG	= 0x0010,
247 	/* The chip must be reset for all outgoing bus resets.  */
248 	AHD_SCSIRST_BUG		= 0x0020,
249 	/* Some PCIX fields must be saved and restored across chip reset. */
250 	AHD_PCIX_CHIPRST_BUG	= 0x0040,
251 	/* MMAPIO is not functional in PCI-X mode.  */
252 	AHD_PCIX_MMAPIO_BUG	= 0x0080,
253 	/* Reads to SCBRAM fail to reset the discard timer. */
254 	AHD_PCIX_SCBRAM_RD_BUG  = 0x0100,
255 	/* Bug workarounds that can be disabled on non-PCIX busses. */
256 	AHD_PCIX_BUG_MASK	= AHD_PCIX_CHIPRST_BUG
257 				| AHD_PCIX_MMAPIO_BUG
258 				| AHD_PCIX_SCBRAM_RD_BUG,
259 	/*
260 	 * LQOSTOP0 status set even for forced selections with ATN
261 	 * to perform non-packetized message delivery.
262 	 */
263 	AHD_LQO_ATNO_BUG	= 0x0200,
264 	/* FIFO auto-flush does not always trigger.  */
265 	AHD_AUTOFLUSH_BUG	= 0x0400,
266 	/* The CLRLQO registers are not self-clearing. */
267 	AHD_CLRLQO_AUTOCLR_BUG	= 0x0800,
268 	/* The PACKETIZED status bit refers to the previous connection. */
269 	AHD_PKTIZED_STATUS_BUG  = 0x1000,
270 	/* "Short Luns" are not placed into outgoing LQ packets correctly. */
271 	AHD_PKT_LUN_BUG		= 0x2000,
272 	/*
273 	 * Only the FIFO allocated to the non-packetized connection may
274 	 * be in use during a non-packetzied connection.
275 	 */
276 	AHD_NONPACKFIFO_BUG	= 0x4000,
277 	/*
278 	 * Writing to a DFF SCBPTR register may fail if concurent with
279 	 * a hardware write to the other DFF SCBPTR register.  This is
280 	 * not currently a concern in our sequencer since all chips with
281 	 * this bug have the AHD_NONPACKFIFO_BUG and all writes of concern
282 	 * occur in non-packetized connections.
283 	 */
284 	AHD_MDFF_WSCBPTR_BUG	= 0x8000,
285 	/* SGHADDR updates are slow. */
286 	AHD_REG_SLOW_SETTLE_BUG	= 0x10000,
287 	/*
288 	 * Changing the MODE_PTR coincident with an interrupt that
289 	 * switches to a different mode will cause the interrupt to
290 	 * be in the mode written outside of interrupt context.
291 	 */
292 	AHD_SET_MODE_BUG	= 0x20000,
293 	/* Non-packetized busfree revision does not work. */
294 	AHD_BUSFREEREV_BUG	= 0x40000,
295 	/*
296 	 * Paced transfers are indicated with a non-standard PPR
297 	 * option bit in the neg table, 160MHz is indicated by
298 	 * sync factor 0x7, and the offset if off by a factor of 2.
299 	 */
300 	AHD_PACED_NEGTABLE_BUG	= 0x80000,
301 	/* LQOOVERRUN false positives. */
302 	AHD_LQOOVERRUN_BUG	= 0x100000,
303 	/*
304 	 * Controller write to INTSTAT will lose to a host
305 	 * write to CLRINT.
306 	 */
307 	AHD_INTCOLLISION_BUG	= 0x200000,
308 	/*
309 	 * The GEM318 violates the SCSI spec by not waiting
310 	 * the mandated bus settle delay between phase changes
311 	 * in some situations.  Some aic79xx chip revs. are more
312 	 * strict in this regard and will treat REQ assertions
313 	 * that fall within the bus settle delay window as
314 	 * glitches.  This flag tells the firmware to tolerate
315 	 * early REQ assertions.
316 	 */
317 	AHD_EARLY_REQ_BUG	= 0x400000,
318 	/*
319 	 * The LED does not stay on long enough in packetized modes.
320 	 */
321 	AHD_FAINT_LED_BUG	= 0x800000
322 } ahd_bug;
323 
324 /*
325  * Configuration specific settings.
326  * The driver determines these settings by probing the
327  * chip/controller's configuration.
328  */
329 typedef enum {
330 	AHD_FNONE	      = 0x00000,
331 	AHD_BOOT_CHANNEL      = 0x00001,/* We were set as the boot channel. */
332 	AHD_USEDEFAULTS	      = 0x00004,/*
333 					 * For cards without an seeprom
334 					 * or a BIOS to initialize the chip's
335 					 * SRAM, we use the default target
336 					 * settings.
337 					 */
338 	AHD_SEQUENCER_DEBUG   = 0x00008,
339 	AHD_RESET_BUS_A	      = 0x00010,
340 	AHD_EXTENDED_TRANS_A  = 0x00020,
341 	AHD_TERM_ENB_A	      = 0x00040,
342 	AHD_SPCHK_ENB_A	      = 0x00080,
343 	AHD_STPWLEVEL_A	      = 0x00100,
344 	AHD_INITIATORROLE     = 0x00200,/*
345 					 * Allow initiator operations on
346 					 * this controller.
347 					 */
348 	AHD_TARGETROLE	      = 0x00400,/*
349 					 * Allow target operations on this
350 					 * controller.
351 					 */
352 	AHD_RESOURCE_SHORTAGE = 0x00800,
353 	AHD_TQINFIFO_BLOCKED  = 0x01000,/* Blocked waiting for ATIOs */
354 	AHD_INT50_SPEEDFLEX   = 0x02000,/*
355 					 * Internal 50pin connector
356 					 * sits behind an aic3860
357 					 */
358 	AHD_BIOS_ENABLED      = 0x04000,
359 	AHD_ALL_INTERRUPTS    = 0x08000,
360 	AHD_39BIT_ADDRESSING  = 0x10000,/* Use 39 bit addressing scheme. */
361 	AHD_64BIT_ADDRESSING  = 0x20000,/* Use 64 bit addressing scheme. */
362 	AHD_CURRENT_SENSING   = 0x40000,
363 	AHD_SCB_CONFIG_USED   = 0x80000,/* No SEEPROM but SCB had info. */
364 	AHD_HP_BOARD	      = 0x100000,
365 	AHD_BUS_RESET_ACTIVE  = 0x200000,
366 	AHD_UPDATE_PEND_CMDS  = 0x400000,
367 	AHD_RUNNING_QOUTFIFO  = 0x800000,
368 	AHD_HAD_FIRST_SEL     = 0x1000000
369 } ahd_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.
394  */
395 struct initiator_status {
396 	uint32_t residual_datacnt;	/* Residual in the current S/G seg */
397 	uint32_t residual_sgptr;	/* The next S/G for this transfer */
398 	uint8_t	 scsi_status;		/* Standard SCSI status byte */
399 };
400 
401 struct target_status {
402 	uint32_t residual_datacnt;	/* Residual in the current S/G seg */
403 	uint32_t residual_sgptr;	/* The next S/G for this transfer */
404 	uint8_t  scsi_status;		/* SCSI status to give to initiator */
405 	uint8_t  target_phases;		/* Bitmap of phases to execute */
406 	uint8_t  data_phase;		/* Data-In or Data-Out */
407 	uint8_t  initiator_tag;		/* Initiator's transaction tag */
408 };
409 
410 /*
411  * Initiator mode SCB shared data area.
412  * If the embedded CDB is 12 bytes or less, we embed
413  * the sense buffer address in the SCB.  This allows
414  * us to retrieve sense information without interrupting
415  * the host in packetized mode.
416  */
417 typedef uint32_t sense_addr_t;
418 #define MAX_CDB_LEN 16
419 #define MAX_CDB_LEN_WITH_SENSE_ADDR (MAX_CDB_LEN - sizeof(sense_addr_t))
420 union initiator_data {
421 	struct {
422 		uint64_t cdbptr;
423 		uint8_t  cdblen;
424 	} cdb_from_host;
425 	uint8_t	 cdb[MAX_CDB_LEN];
426 	struct {
427 		uint8_t	 cdb[MAX_CDB_LEN_WITH_SENSE_ADDR];
428 		sense_addr_t sense_addr;
429 	} cdb_plus_saddr;
430 };
431 
432 /*
433  * Target mode version of the shared data SCB segment.
434  */
435 struct target_data {
436 	uint32_t spare[2];
437 	uint8_t  scsi_status;		/* SCSI status to give to initiator */
438 	uint8_t  target_phases;		/* Bitmap of phases to execute */
439 	uint8_t  data_phase;		/* Data-In or Data-Out */
440 	uint8_t  initiator_tag;		/* Initiator's transaction tag */
441 };
442 
443 struct hardware_scb {
444 /*0*/	union {
445 		union	initiator_data idata;
446 		struct	target_data tdata;
447 		struct	initiator_status istatus;
448 		struct	target_status tstatus;
449 	} shared_data;
450 /*
451  * A word about residuals.
452  * The scb is presented to the sequencer with the dataptr and datacnt
453  * fields initialized to the contents of the first S/G element to
454  * transfer.  The sgptr field is initialized to the bus address for
455  * the S/G element that follows the first in the in core S/G array
456  * or'ed with the SG_FULL_RESID flag.  Sgptr may point to an invalid
457  * S/G entry for this transfer (single S/G element transfer with the
458  * first elements address and length preloaded in the dataptr/datacnt
459  * fields).  If no transfer is to occur, sgptr is set to SG_LIST_NULL.
460  * The SG_FULL_RESID flag ensures that the residual will be correctly
461  * noted even if no data transfers occur.  Once the data phase is entered,
462  * the residual sgptr and datacnt are loaded from the sgptr and the
463  * datacnt fields.  After each S/G element's dataptr and length are
464  * loaded into the hardware, the residual sgptr is advanced.  After
465  * each S/G element is expired, its datacnt field is checked to see
466  * if the LAST_SEG flag is set.  If so, SG_LIST_NULL is set in the
467  * residual sg ptr and the transfer is considered complete.  If the
468  * sequencer determines that there is a residual in the tranfer, or
469  * there is non-zero status, it will set the SG_STATUS_VALID flag in
470  * sgptr and dma the scb back into host memory.  To sumarize:
471  *
472  * Sequencer:
473  *	o A residual has occurred if SG_FULL_RESID is set in sgptr,
474  *	  or residual_sgptr does not have SG_LIST_NULL set.
475  *
476  *	o We are transferring the last segment if residual_datacnt has
477  *	  the SG_LAST_SEG flag set.
478  *
479  * Host:
480  *	o A residual can only have occurred if a completed scb has the
481  *	  SG_STATUS_VALID flag set.  Inspection of the SCSI status field,
482  *	  the residual_datacnt, and the residual_sgptr field will tell
483  *	  for sure.
484  *
485  *	o residual_sgptr and sgptr refer to the "next" sg entry
486  *	  and so may point beyond the last valid sg entry for the
487  *	  transfer.
488  */
489 #define SG_PTR_MASK	0xFFFFFFF8
490 /*16*/	uint16_t tag;		/* Reused by Sequencer. */
491 /*18*/	uint8_t  control;	/* See SCB_CONTROL in aic79xx.reg for details */
492 /*19*/	uint8_t	 scsiid;	/*
493 				 * Selection out Id
494 				 * Our Id (bits 0-3) Their ID (bits 4-7)
495 				 */
496 /*20*/	uint8_t  lun;
497 /*21*/	uint8_t  task_attribute;
498 /*22*/	uint8_t  cdb_len;
499 /*23*/	uint8_t  task_management;
500 /*24*/	uint64_t dataptr;
501 /*32*/	uint32_t datacnt;	/* Byte 3 is spare. */
502 /*36*/	uint32_t sgptr;
503 /*40*/	uint32_t hscb_busaddr;
504 /*44*/	uint32_t next_hscb_busaddr;
505 /********** Long lun field only downloaded for full 8 byte lun support ********/
506 /*48*/  uint8_t	 pkt_long_lun[8];
507 /******* Fields below are not Downloaded (Sequencer may use for scratch) ******/
508 /*56*/  uint8_t	 spare[8];
509 };
510 
511 /************************ Kernel SCB Definitions ******************************/
512 /*
513  * Some fields of the SCB are OS dependent.  Here we collect the
514  * definitions for elements that all OS platforms need to include
515  * in there SCB definition.
516  */
517 
518 /*
519  * Definition of a scatter/gather element as transferred to the controller.
520  * The aic7xxx chips only support a 24bit length.  We use the top byte of
521  * the length to store additional address bits and a flag to indicate
522  * that a given segment terminates the transfer.  This gives us an
523  * addressable range of 512GB on machines with 64bit PCI or with chips
524  * that can support dual address cycles on 32bit PCI busses.
525  */
526 struct ahd_dma_seg {
527 	uint32_t	addr;
528 	uint32_t	len;
529 #define	AHD_DMA_LAST_SEG	0x80000000
530 #define	AHD_SG_HIGH_ADDR_MASK	0x7F000000
531 #define	AHD_SG_LEN_MASK		0x00FFFFFF
532 };
533 
534 struct ahd_dma64_seg {
535 	uint64_t	addr;
536 	uint32_t	len;
537 	uint32_t	pad;
538 };
539 
540 struct map_node {
541 	bus_dmamap_t		 dmamap;
542 	dma_addr_t		 physaddr;
543 	uint8_t			*vaddr;
544 	SLIST_ENTRY(map_node)	 links;
545 };
546 
547 /*
548  * The current state of this SCB.
549  */
550 typedef enum {
551 	SCB_FLAG_NONE		= 0x00000,
552 	SCB_TRANSMISSION_ERROR	= 0x00001,/*
553 					   * We detected a parity or CRC
554 					   * error that has effected the
555 					   * payload of the command.  This
556 					   * flag is checked when normal
557 					   * status is returned to catch
558 					   * the case of a target not
559 					   * responding to our attempt
560 					   * to report the error.
561 					   */
562 	SCB_OTHERTCL_TIMEOUT	= 0x00002,/*
563 					   * Another device was active
564 					   * during the first timeout for
565 					   * this SCB so we gave ourselves
566 					   * an additional timeout period
567 					   * in case it was hogging the
568 					   * bus.
569 				           */
570 	SCB_DEVICE_RESET	= 0x00004,
571 	SCB_SENSE		= 0x00008,
572 	SCB_CDB32_PTR		= 0x00010,
573 	SCB_RECOVERY_SCB	= 0x00020,
574 	SCB_AUTO_NEGOTIATE	= 0x00040,/* Negotiate to achieve goal. */
575 	SCB_NEGOTIATE		= 0x00080,/* Negotiation forced for command. */
576 	SCB_ABORT		= 0x00100,
577 	SCB_ACTIVE		= 0x00200,
578 	SCB_TARGET_IMMEDIATE	= 0x00400,
579 	SCB_PACKETIZED		= 0x00800,
580 	SCB_EXPECT_PPR_BUSFREE	= 0x01000,
581 	SCB_PKT_SENSE		= 0x02000,
582 	SCB_EXTERNAL_RESET	= 0x04000,/* Device was reset externally */
583 	SCB_ON_COL_LIST		= 0x08000,
584 	SCB_SILENT		= 0x10000 /*
585 					   * Be quiet about transmission type
586 					   * errors.  They are expected and we
587 					   * don't want to upset the user.  This
588 					   * flag is typically used during DV.
589 					   */
590 } scb_flag;
591 
592 struct scb {
593 	struct	hardware_scb	 *hscb;
594 	union {
595 		SLIST_ENTRY(scb)  sle;
596 		LIST_ENTRY(scb)	  le;
597 		TAILQ_ENTRY(scb)  tqe;
598 	} links;
599 	union {
600 		SLIST_ENTRY(scb)  sle;
601 		LIST_ENTRY(scb)	  le;
602 		TAILQ_ENTRY(scb)  tqe;
603 	} links2;
604 #define pending_links links2.le
605 #define collision_links links2.le
606 	struct scb		 *col_scb;
607 	ahd_io_ctx_t		  io_ctx;
608 	struct ahd_softc	 *ahd_softc;
609 	scb_flag		  flags;
610 	struct scb_platform_data *platform_data;
611 	struct map_node		 *hscb_map;
612 	struct map_node		 *sg_map;
613 	struct map_node		 *sense_map;
614 	void			 *sg_list;
615 	uint8_t			 *sense_data;
616 	dma_addr_t		  sg_list_busaddr;
617 	dma_addr_t		  sense_busaddr;
618 	u_int			  sg_count;/* How full ahd_dma_seg is */
619 #define	AHD_MAX_LQ_CRC_ERRORS 5
620 	u_int			  crc_retry_count;
621 };
622 
623 TAILQ_HEAD(scb_tailq, scb);
624 BSD_LIST_HEAD(scb_list, scb);
625 
626 struct scb_data {
627 	/*
628 	 * TAILQ of lists of free SCBs grouped by device
629 	 * collision domains.
630 	 */
631 	struct scb_tailq free_scbs;
632 
633 	/*
634 	 * Per-device lists of SCBs whose tag ID would collide
635 	 * with an already active tag on the device.
636 	 */
637 	struct scb_list free_scb_lists[AHD_NUM_TARGETS * AHD_NUM_LUNS_NONPKT];
638 
639 	/*
640 	 * SCBs that will not collide with any active device.
641 	 */
642 	struct scb_list any_dev_free_scb_list;
643 
644 	/*
645 	 * Mapping from tag to SCB.
646 	 */
647 	struct	scb *scbindex[AHD_SCB_MAX];
648 
649 	/*
650 	 * "Bus" addresses of our data structures.
651 	 */
652 	bus_dma_tag_t	 hscb_dmat;	/* dmat for our hardware SCB array */
653 	bus_dma_tag_t	 sg_dmat;	/* dmat for our sg segments */
654 	bus_dma_tag_t	 sense_dmat;	/* dmat for our sense buffers */
655 	SLIST_HEAD(, map_node) hscb_maps;
656 	SLIST_HEAD(, map_node) sg_maps;
657 	SLIST_HEAD(, map_node) sense_maps;
658 	int		 scbs_left;	/* unallocated scbs in head map_node */
659 	int		 sgs_left;	/* unallocated sgs in head map_node */
660 	int		 sense_left;	/* unallocated sense in head map_node */
661 	uint16_t	 numscbs;
662 	uint16_t	 maxhscbs;	/* Number of SCBs on the card */
663 	uint8_t		 init_level;	/*
664 					 * How far we've initialized
665 					 * this structure.
666 					 */
667 };
668 
669 /************************ Target Mode Definitions *****************************/
670 
671 /*
672  * Connection descriptor for select-in requests in target mode.
673  */
674 struct target_cmd {
675 	uint8_t scsiid;		/* Our ID and the initiator's ID */
676 	uint8_t identify;	/* Identify message */
677 	uint8_t bytes[22];	/*
678 				 * Bytes contains any additional message
679 				 * bytes terminated by 0xFF.  The remainder
680 				 * is the cdb to execute.
681 				 */
682 	uint8_t cmd_valid;	/*
683 				 * When a command is complete, the firmware
684 				 * will set cmd_valid to all bits set.
685 				 * After the host has seen the command,
686 				 * the bits are cleared.  This allows us
687 				 * to just peek at host memory to determine
688 				 * if more work is complete. cmd_valid is on
689 				 * an 8 byte boundary to simplify setting
690 				 * it on aic7880 hardware which only has
691 				 * limited direct access to the DMA FIFO.
692 				 */
693 	uint8_t pad[7];
694 };
695 
696 /*
697  * Number of events we can buffer up if we run out
698  * of immediate notify ccbs.
699  */
700 #define AHD_TMODE_EVENT_BUFFER_SIZE 8
701 struct ahd_tmode_event {
702 	uint8_t initiator_id;
703 	uint8_t event_type;	/* MSG type or EVENT_TYPE_BUS_RESET */
704 #define	EVENT_TYPE_BUS_RESET 0xFF
705 	uint8_t event_arg;
706 };
707 
708 /*
709  * Per enabled lun target mode state.
710  * As this state is directly influenced by the host OS'es target mode
711  * environment, we let the OS module define it.  Forward declare the
712  * structure here so we can store arrays of them, etc. in OS neutral
713  * data structures.
714  */
715 #ifdef AHD_TARGET_MODE
716 struct ahd_tmode_lstate {
717 	struct cam_path *path;
718 	struct ccb_hdr_slist accept_tios;
719 	struct ccb_hdr_slist immed_notifies;
720 	struct ahd_tmode_event event_buffer[AHD_TMODE_EVENT_BUFFER_SIZE];
721 	uint8_t event_r_idx;
722 	uint8_t event_w_idx;
723 };
724 #else
725 struct ahd_tmode_lstate;
726 #endif
727 
728 /******************** Transfer Negotiation Datastructures *********************/
729 #define AHD_TRANS_CUR		0x01	/* Modify current neogtiation status */
730 #define AHD_TRANS_ACTIVE	0x03	/* Assume this target is on the bus */
731 #define AHD_TRANS_GOAL		0x04	/* Modify negotiation goal */
732 #define AHD_TRANS_USER		0x08	/* Modify user negotiation settings */
733 #define AHD_PERIOD_10MHz	0x19
734 
735 #define AHD_WIDTH_UNKNOWN	0xFF
736 #define AHD_PERIOD_UNKNOWN	0xFF
737 #define AHD_OFFSET_UNKNOWN	0xFF
738 #define AHD_PPR_OPTS_UNKNOWN	0xFF
739 
740 /*
741  * Transfer Negotiation Information.
742  */
743 struct ahd_transinfo {
744 	uint8_t protocol_version;	/* SCSI Revision level */
745 	uint8_t transport_version;	/* SPI Revision level */
746 	uint8_t width;			/* Bus width */
747 	uint8_t period;			/* Sync rate factor */
748 	uint8_t offset;			/* Sync offset */
749 	uint8_t ppr_options;		/* Parallel Protocol Request options */
750 };
751 
752 /*
753  * Per-initiator current, goal and user transfer negotiation information. */
754 struct ahd_initiator_tinfo {
755 	struct ahd_transinfo curr;
756 	struct ahd_transinfo goal;
757 	struct ahd_transinfo user;
758 };
759 
760 /*
761  * Per enabled target ID state.
762  * Pointers to lun target state as well as sync/wide negotiation information
763  * for each initiator<->target mapping.  For the initiator role we pretend
764  * that we are the target and the targets are the initiators since the
765  * negotiation is the same regardless of role.
766  */
767 struct ahd_tmode_tstate {
768 	struct ahd_tmode_lstate*	enabled_luns[AHD_NUM_LUNS];
769 	struct ahd_initiator_tinfo	transinfo[AHD_NUM_TARGETS];
770 
771 	/*
772 	 * Per initiator state bitmasks.
773 	 */
774 	uint16_t	 auto_negotiate;/* Auto Negotiation Required */
775 	uint16_t	 discenable;	/* Disconnection allowed  */
776 	uint16_t	 tagenable;	/* Tagged Queuing allowed */
777 };
778 
779 /*
780  * Points of interest along the negotiated transfer scale.
781  */
782 #define AHD_SYNCRATE_160	0x8
783 #define AHD_SYNCRATE_PACED	0x8
784 #define AHD_SYNCRATE_DT		0x9
785 #define AHD_SYNCRATE_ULTRA2	0xa
786 #define AHD_SYNCRATE_ULTRA	0xc
787 #define AHD_SYNCRATE_FAST	0x19
788 #define AHD_SYNCRATE_MIN_DT	AHD_SYNCRATE_FAST
789 #define AHD_SYNCRATE_SYNC	0x32
790 #define AHD_SYNCRATE_MIN	0x60
791 #define	AHD_SYNCRATE_ASYNC	0xFF
792 #define AHD_SYNCRATE_MAX	AHD_SYNCRATE_160
793 
794 /* Safe and valid period for async negotiations. */
795 #define	AHD_ASYNC_XFER_PERIOD	0x44
796 
797 /*
798  * In RevA, the synctable uses a 120MHz rate for the period
799  * factor 8 and 160MHz for the period factor 7.  The 120MHz
800  * rate never made it into the official SCSI spec, so we must
801  * compensate when setting the negotiation table for Rev A
802  * parts.
803  */
804 #define AHD_SYNCRATE_REVA_120	0x8
805 #define AHD_SYNCRATE_REVA_160	0x7
806 
807 /***************************** Lookup Tables **********************************/
808 /*
809  * Phase -> name and message out response
810  * to parity errors in each phase table.
811  */
812 struct ahd_phase_table_entry {
813 	uint8_t phase;
814 	uint8_t mesg_out; /* Message response to parity errors */
815 	const char *phasemsg;
816 };
817 
818 /************************** Serial EEPROM Format ******************************/
819 
820 struct seeprom_config {
821 /*
822  * Per SCSI ID Configuration Flags
823  */
824 	uint16_t device_flags[16];	/* words 0-15 */
825 #define		CFXFER		0x003F	/* synchronous transfer rate */
826 #define			CFXFER_ASYNC	0x3F
827 #define		CFQAS		0x0040	/* Negotiate QAS */
828 #define		CFPACKETIZED	0x0080	/* Negotiate Packetized Transfers */
829 #define		CFSTART		0x0100	/* send start unit SCSI command */
830 #define		CFINCBIOS	0x0200	/* include in BIOS scan */
831 #define		CFDISC		0x0400	/* enable disconnection */
832 #define		CFMULTILUNDEV	0x0800	/* Probe multiple luns in BIOS scan */
833 #define		CFWIDEB		0x1000	/* wide bus device */
834 #define		CFHOSTMANAGED	0x8000	/* Managed by a RAID controller */
835 
836 /*
837  * BIOS Control Bits
838  */
839 	uint16_t bios_control;		/* word 16 */
840 #define		CFSUPREM	0x0001	/* support all removeable drives */
841 #define		CFSUPREMB	0x0002	/* support removeable boot drives */
842 #define		CFBIOSSTATE	0x000C	/* BIOS Action State */
843 #define		    CFBS_DISABLED	0x00
844 #define		    CFBS_ENABLED	0x04
845 #define		    CFBS_DISABLED_SCAN	0x08
846 #define		CFENABLEDV	0x0010	/* Perform Domain Validation */
847 #define		CFCTRL_A	0x0020	/* BIOS displays Ctrl-A message */
848 #define		CFSPARITY	0x0040	/* SCSI parity */
849 #define		CFEXTEND	0x0080	/* extended translation enabled */
850 #define		CFBOOTCD	0x0100  /* Support Bootable CD-ROM */
851 #define		CFMSG_LEVEL	0x0600	/* BIOS Message Level */
852 #define			CFMSG_VERBOSE	0x0000
853 #define			CFMSG_SILENT	0x0200
854 #define			CFMSG_DIAG	0x0400
855 #define		CFRESETB	0x0800	/* reset SCSI bus at boot */
856 /*		UNUSED		0xf000	*/
857 
858 /*
859  * Host Adapter Control Bits
860  */
861 	uint16_t adapter_control;	/* word 17 */
862 #define		CFAUTOTERM	0x0001	/* Perform Auto termination */
863 #define		CFSTERM		0x0002	/* SCSI low byte termination */
864 #define		CFWSTERM	0x0004	/* SCSI high byte termination */
865 #define		CFSEAUTOTERM	0x0008	/* Ultra2 Perform secondary Auto Term*/
866 #define		CFSELOWTERM	0x0010	/* Ultra2 secondary low term */
867 #define		CFSEHIGHTERM	0x0020	/* Ultra2 secondary high term */
868 #define		CFSTPWLEVEL	0x0040	/* Termination level control */
869 #define		CFBIOSAUTOTERM	0x0080	/* Perform Auto termination */
870 #define		CFTERM_MENU	0x0100	/* BIOS displays termination menu */
871 #define		CFCLUSTERENB	0x8000	/* Cluster Enable */
872 
873 /*
874  * Bus Release Time, Host Adapter ID
875  */
876 	uint16_t brtime_id;		/* word 18 */
877 #define		CFSCSIID	0x000f	/* host adapter SCSI ID */
878 /*		UNUSED		0x00f0	*/
879 #define		CFBRTIME	0xff00	/* bus release time/PCI Latency Time */
880 
881 /*
882  * Maximum targets
883  */
884 	uint16_t max_targets;		/* word 19 */
885 #define		CFMAXTARG	0x00ff	/* maximum targets */
886 #define		CFBOOTLUN	0x0f00	/* Lun to boot from */
887 #define		CFBOOTID	0xf000	/* Target to boot from */
888 	uint16_t res_1[10];		/* words 20-29 */
889 	uint16_t signature;		/* BIOS Signature */
890 #define		CFSIGNATURE	0x400
891 	uint16_t checksum;		/* word 31 */
892 };
893 
894 /*
895  * Vital Product Data used during POST and by the BIOS.
896  */
897 struct vpd_config {
898 	uint8_t  bios_flags;
899 #define		VPDMASTERBIOS	0x0001
900 #define		VPDBOOTHOST	0x0002
901 	uint8_t  reserved_1[21];
902 	uint8_t  resource_type;
903 	uint8_t  resource_len[2];
904 	uint8_t  resource_data[8];
905 	uint8_t  vpd_tag;
906 	uint16_t vpd_len;
907 	uint8_t  vpd_keyword[2];
908 	uint8_t  length;
909 	uint8_t  revision;
910 	uint8_t  device_flags;
911 	uint8_t  termination_menus[2];
912 	uint8_t  fifo_threshold;
913 	uint8_t  end_tag;
914 	uint8_t  vpd_checksum;
915 	uint16_t default_target_flags;
916 	uint16_t default_bios_flags;
917 	uint16_t default_ctrl_flags;
918 	uint8_t  default_irq;
919 	uint8_t  pci_lattime;
920 	uint8_t  max_target;
921 	uint8_t  boot_lun;
922 	uint16_t signature;
923 	uint8_t  reserved_2;
924 	uint8_t  checksum;
925 	uint8_t	 reserved_3[4];
926 };
927 
928 /****************************** Flexport Logic ********************************/
929 #define FLXADDR_TERMCTL			0x0
930 #define		FLX_TERMCTL_ENSECHIGH	0x8
931 #define		FLX_TERMCTL_ENSECLOW	0x4
932 #define		FLX_TERMCTL_ENPRIHIGH	0x2
933 #define		FLX_TERMCTL_ENPRILOW	0x1
934 #define FLXADDR_ROMSTAT_CURSENSECTL	0x1
935 #define		FLX_ROMSTAT_SEECFG	0xF0
936 #define		FLX_ROMSTAT_EECFG	0x0F
937 #define		FLX_ROMSTAT_SEE_93C66	0x00
938 #define		FLX_ROMSTAT_SEE_NONE	0xF0
939 #define		FLX_ROMSTAT_EE_512x8	0x0
940 #define		FLX_ROMSTAT_EE_1MBx8	0x1
941 #define		FLX_ROMSTAT_EE_2MBx8	0x2
942 #define		FLX_ROMSTAT_EE_4MBx8	0x3
943 #define		FLX_ROMSTAT_EE_16MBx8	0x4
944 #define			CURSENSE_ENB	0x1
945 #define	FLXADDR_FLEXSTAT		0x2
946 #define		FLX_FSTAT_BUSY		0x1
947 #define FLXADDR_CURRENT_STAT		0x4
948 #define		FLX_CSTAT_SEC_HIGH	0xC0
949 #define		FLX_CSTAT_SEC_LOW	0x30
950 #define		FLX_CSTAT_PRI_HIGH	0x0C
951 #define		FLX_CSTAT_PRI_LOW	0x03
952 #define		FLX_CSTAT_MASK		0x03
953 #define		FLX_CSTAT_SHIFT		2
954 #define		FLX_CSTAT_OKAY		0x0
955 #define		FLX_CSTAT_OVER		0x1
956 #define		FLX_CSTAT_UNDER		0x2
957 #define		FLX_CSTAT_INVALID	0x3
958 
959 int		ahd_read_seeprom(struct ahd_softc *ahd, uint16_t *buf,
960 				 u_int start_addr, u_int count, int bstream);
961 
962 int		ahd_write_seeprom(struct ahd_softc *ahd, uint16_t *buf,
963 				  u_int start_addr, u_int count);
964 int		ahd_verify_cksum(struct seeprom_config *sc);
965 int		ahd_acquire_seeprom(struct ahd_softc *ahd);
966 void		ahd_release_seeprom(struct ahd_softc *ahd);
967 
968 /****************************  Message Buffer *********************************/
969 typedef enum {
970 	MSG_FLAG_NONE			= 0x00,
971 	MSG_FLAG_EXPECT_PPR_BUSFREE	= 0x01,
972 	MSG_FLAG_IU_REQ_CHANGED		= 0x02,
973 	MSG_FLAG_EXPECT_IDE_BUSFREE	= 0x04,
974 	MSG_FLAG_EXPECT_QASREJ_BUSFREE	= 0x08,
975 	MSG_FLAG_PACKETIZED		= 0x10
976 } ahd_msg_flags;
977 
978 typedef enum {
979 	MSG_TYPE_NONE			= 0x00,
980 	MSG_TYPE_INITIATOR_MSGOUT	= 0x01,
981 	MSG_TYPE_INITIATOR_MSGIN	= 0x02,
982 	MSG_TYPE_TARGET_MSGOUT		= 0x03,
983 	MSG_TYPE_TARGET_MSGIN		= 0x04
984 } ahd_msg_type;
985 
986 typedef enum {
987 	MSGLOOP_IN_PROG,
988 	MSGLOOP_MSGCOMPLETE,
989 	MSGLOOP_TERMINATED
990 } msg_loop_stat;
991 
992 /*********************** Software Configuration Structure *********************/
993 struct ahd_suspend_channel_state {
994 	uint8_t	scsiseq;
995 	uint8_t	sxfrctl0;
996 	uint8_t	sxfrctl1;
997 	uint8_t	simode0;
998 	uint8_t	simode1;
999 	uint8_t	seltimer;
1000 	uint8_t	seqctl;
1001 };
1002 
1003 struct ahd_suspend_pci_state {
1004 	uint32_t  devconfig;
1005 	uint8_t   command;
1006 	uint8_t   csize_lattime;
1007 };
1008 
1009 struct ahd_suspend_state {
1010 	struct	ahd_suspend_channel_state channel[2];
1011 	struct  ahd_suspend_pci_state pci_state;
1012 	uint8_t	optionmode;
1013 	uint8_t	dscommand0;
1014 	uint8_t	dspcistatus;
1015 	/* hsmailbox */
1016 	uint8_t	crccontrol1;
1017 	uint8_t	scbbaddr;
1018 	/* Host and sequencer SCB counts */
1019 	uint8_t	dff_thrsh;
1020 	uint8_t	*scratch_ram;
1021 	uint8_t	*btt;
1022 };
1023 
1024 typedef void (*ahd_bus_intr_t)(struct ahd_softc *);
1025 
1026 typedef enum {
1027 	AHD_MODE_DFF0,
1028 	AHD_MODE_DFF1,
1029 	AHD_MODE_CCHAN,
1030 	AHD_MODE_SCSI,
1031 	AHD_MODE_CFG,
1032 	AHD_MODE_UNKNOWN
1033 } ahd_mode;
1034 
1035 #define AHD_MK_MSK(x) (0x01 << (x))
1036 #define AHD_MODE_DFF0_MSK	AHD_MK_MSK(AHD_MODE_DFF0)
1037 #define AHD_MODE_DFF1_MSK	AHD_MK_MSK(AHD_MODE_DFF1)
1038 #define AHD_MODE_CCHAN_MSK	AHD_MK_MSK(AHD_MODE_CCHAN)
1039 #define AHD_MODE_SCSI_MSK	AHD_MK_MSK(AHD_MODE_SCSI)
1040 #define AHD_MODE_CFG_MSK	AHD_MK_MSK(AHD_MODE_CFG)
1041 #define AHD_MODE_UNKNOWN_MSK	AHD_MK_MSK(AHD_MODE_UNKNOWN)
1042 #define AHD_MODE_ANY_MSK (~0)
1043 
1044 typedef uint8_t ahd_mode_state;
1045 
1046 struct ahd_completion
1047 {
1048 	uint16_t	tag;
1049 	uint8_t		sg_status;
1050 	uint8_t		valid_tag;
1051 };
1052 
1053 struct ahd_softc {
1054 	bus_space_tag_t		  tags[2];
1055 	bus_space_handle_t	  bshs[2];
1056 	struct scb_data		  scb_data;
1057 
1058 	struct hardware_scb	 *next_queued_hscb;
1059 	struct map_node		 *next_queued_hscb_map;
1060 
1061 	/*
1062 	 * SCBs that have been sent to the controller
1063 	 */
1064 	BSD_LIST_HEAD(, scb)	  pending_scbs;
1065 
1066 	/*
1067 	 * Current register window mode information.
1068 	 */
1069 	ahd_mode		  dst_mode;
1070 	ahd_mode		  src_mode;
1071 
1072 	/*
1073 	 * Saved register window mode information
1074 	 * used for restore on next unpause.
1075 	 */
1076 	ahd_mode		  saved_dst_mode;
1077 	ahd_mode		  saved_src_mode;
1078 
1079 	/*
1080 	 * Platform specific data.
1081 	 */
1082 	struct ahd_platform_data *platform_data;
1083 
1084 	/*
1085 	 * Platform specific device information.
1086 	 */
1087 	ahd_dev_softc_t		  dev_softc;
1088 
1089 	/*
1090 	 * Bus specific device information.
1091 	 */
1092 	ahd_bus_intr_t		  bus_intr;
1093 
1094 	/*
1095 	 * Target mode related state kept on a per enabled lun basis.
1096 	 * Targets that are not enabled will have null entries.
1097 	 * As an initiator, we keep one target entry for our initiator
1098 	 * ID to store our sync/wide transfer settings.
1099 	 */
1100 	struct ahd_tmode_tstate  *enabled_targets[AHD_NUM_TARGETS];
1101 
1102 	/*
1103 	 * The black hole device responsible for handling requests for
1104 	 * disabled luns on enabled targets.
1105 	 */
1106 	struct ahd_tmode_lstate  *black_hole;
1107 
1108 	/*
1109 	 * Device instance currently on the bus awaiting a continue TIO
1110 	 * for a command that was not given the disconnect priveledge.
1111 	 */
1112 	struct ahd_tmode_lstate  *pending_device;
1113 
1114 	/*
1115 	 * Timer handles for timer driven callbacks.
1116 	 */
1117 	struct timer_list	stat_timer;
1118 
1119 	/*
1120 	 * Statistics.
1121 	 */
1122 #define	AHD_STAT_UPDATE_US	250000 /* 250ms */
1123 #define	AHD_STAT_BUCKETS	4
1124 	u_int			  cmdcmplt_bucket;
1125 	uint32_t		  cmdcmplt_counts[AHD_STAT_BUCKETS];
1126 	uint32_t		  cmdcmplt_total;
1127 
1128 	/*
1129 	 * Card characteristics
1130 	 */
1131 	ahd_chip		  chip;
1132 	ahd_feature		  features;
1133 	ahd_bug			  bugs;
1134 	ahd_flag		  flags;
1135 	struct seeprom_config	 *seep_config;
1136 
1137 	/* Command Queues */
1138 	struct ahd_completion	  *qoutfifo;
1139 	uint16_t		  qoutfifonext;
1140 	uint16_t		  qoutfifonext_valid_tag;
1141 	uint16_t		  qinfifonext;
1142 	uint16_t		  qinfifo[AHD_SCB_MAX];
1143 
1144 	/*
1145 	 * Our qfreeze count.  The sequencer compares
1146 	 * this value with its own counter to determine
1147 	 * whether to allow selections to occur.
1148 	 */
1149 	uint16_t		  qfreeze_cnt;
1150 
1151 	/* Values to store in the SEQCTL register for pause and unpause */
1152 	uint8_t			  unpause;
1153 	uint8_t			  pause;
1154 
1155 	/* Critical Section Data */
1156 	struct cs		 *critical_sections;
1157 	u_int			  num_critical_sections;
1158 
1159 	/* Buffer for handling packetized bitbucket. */
1160 	uint8_t			 *overrun_buf;
1161 
1162 	/* Links for chaining softcs */
1163 	TAILQ_ENTRY(ahd_softc)	  links;
1164 
1165 	/* Channel Names ('A', 'B', etc.) */
1166 	char			  channel;
1167 
1168 	/* Initiator Bus ID */
1169 	uint8_t			  our_id;
1170 
1171 	/*
1172 	 * Target incoming command FIFO.
1173 	 */
1174 	struct target_cmd	 *targetcmds;
1175 	uint8_t			  tqinfifonext;
1176 
1177 	/*
1178 	 * Cached version of the hs_mailbox so we can avoid
1179 	 * pausing the sequencer during mailbox updates.
1180 	 */
1181 	uint8_t			  hs_mailbox;
1182 
1183 	/*
1184 	 * Incoming and outgoing message handling.
1185 	 */
1186 	uint8_t			  send_msg_perror;
1187 	ahd_msg_flags		  msg_flags;
1188 	ahd_msg_type		  msg_type;
1189 	uint8_t			  msgout_buf[12];/* Message we are sending */
1190 	uint8_t			  msgin_buf[12];/* Message we are receiving */
1191 	u_int			  msgout_len;	/* Length of message to send */
1192 	u_int			  msgout_index;	/* Current index in msgout */
1193 	u_int			  msgin_index;	/* Current index in msgin */
1194 
1195 	/*
1196 	 * Mapping information for data structures shared
1197 	 * between the sequencer and kernel.
1198 	 */
1199 	bus_dma_tag_t		  parent_dmat;
1200 	bus_dma_tag_t		  shared_data_dmat;
1201 	struct map_node		  shared_data_map;
1202 
1203 	/* Information saved through suspend/resume cycles */
1204 	struct ahd_suspend_state  suspend_state;
1205 
1206 	/* Number of enabled target mode device on this card */
1207 	u_int			  enabled_luns;
1208 
1209 	/* Initialization level of this data structure */
1210 	u_int			  init_level;
1211 
1212 	/* PCI cacheline size. */
1213 	u_int			  pci_cachesize;
1214 
1215 	/* IO Cell Parameters */
1216 	uint8_t			  iocell_opts[AHD_NUM_PER_DEV_ANNEXCOLS];
1217 
1218 	u_int			  stack_size;
1219 	uint16_t		 *saved_stack;
1220 
1221 	/* Per-Unit descriptive information */
1222 	const char		 *description;
1223 	const char		 *bus_description;
1224 	char			 *name;
1225 	int			  unit;
1226 
1227 	/* Selection Timer settings */
1228 	int			  seltime;
1229 
1230 	/*
1231 	 * Interrupt coalescing settings.
1232 	 */
1233 #define	AHD_INT_COALESCING_TIMER_DEFAULT		250 /*us*/
1234 #define	AHD_INT_COALESCING_MAXCMDS_DEFAULT		10
1235 #define	AHD_INT_COALESCING_MAXCMDS_MAX			127
1236 #define	AHD_INT_COALESCING_MINCMDS_DEFAULT		5
1237 #define	AHD_INT_COALESCING_MINCMDS_MAX			127
1238 #define	AHD_INT_COALESCING_THRESHOLD_DEFAULT		2000
1239 #define	AHD_INT_COALESCING_STOP_THRESHOLD_DEFAULT	1000
1240 	u_int			  int_coalescing_timer;
1241 	u_int			  int_coalescing_maxcmds;
1242 	u_int			  int_coalescing_mincmds;
1243 	u_int			  int_coalescing_threshold;
1244 	u_int			  int_coalescing_stop_threshold;
1245 
1246 	uint16_t		  user_discenable;/* Disconnection allowed  */
1247 	uint16_t		  user_tagenable;/* Tagged Queuing allowed */
1248 };
1249 
1250 /*************************** IO Cell Configuration ****************************/
1251 #define	AHD_PRECOMP_SLEW_INDEX						\
1252     (AHD_ANNEXCOL_PRECOMP_SLEW - AHD_ANNEXCOL_PER_DEV0)
1253 
1254 #define	AHD_AMPLITUDE_INDEX						\
1255     (AHD_ANNEXCOL_AMPLITUDE - AHD_ANNEXCOL_PER_DEV0)
1256 
1257 #define AHD_SET_SLEWRATE(ahd, new_slew)					\
1258 do {									\
1259     (ahd)->iocell_opts[AHD_PRECOMP_SLEW_INDEX] &= ~AHD_SLEWRATE_MASK;	\
1260     (ahd)->iocell_opts[AHD_PRECOMP_SLEW_INDEX] |=			\
1261 	(((new_slew) << AHD_SLEWRATE_SHIFT) & AHD_SLEWRATE_MASK);	\
1262 } while (0)
1263 
1264 #define AHD_SET_PRECOMP(ahd, new_pcomp)					\
1265 do {									\
1266     (ahd)->iocell_opts[AHD_PRECOMP_SLEW_INDEX] &= ~AHD_PRECOMP_MASK;	\
1267     (ahd)->iocell_opts[AHD_PRECOMP_SLEW_INDEX] |=			\
1268 	(((new_pcomp) << AHD_PRECOMP_SHIFT) & AHD_PRECOMP_MASK);	\
1269 } while (0)
1270 
1271 #define AHD_SET_AMPLITUDE(ahd, new_amp)					\
1272 do {									\
1273     (ahd)->iocell_opts[AHD_AMPLITUDE_INDEX] &= ~AHD_AMPLITUDE_MASK;	\
1274     (ahd)->iocell_opts[AHD_AMPLITUDE_INDEX] |=				\
1275 	(((new_amp) << AHD_AMPLITUDE_SHIFT) & AHD_AMPLITUDE_MASK);	\
1276 } while (0)
1277 
1278 /************************ Active Device Information ***************************/
1279 typedef enum {
1280 	ROLE_UNKNOWN,
1281 	ROLE_INITIATOR,
1282 	ROLE_TARGET
1283 } role_t;
1284 
1285 struct ahd_devinfo {
1286 	int	 our_scsiid;
1287 	int	 target_offset;
1288 	uint16_t target_mask;
1289 	u_int	 target;
1290 	u_int	 lun;
1291 	char	 channel;
1292 	role_t	 role;		/*
1293 				 * Only guaranteed to be correct if not
1294 				 * in the busfree state.
1295 				 */
1296 };
1297 
1298 /****************************** PCI Structures ********************************/
1299 #define AHD_PCI_IOADDR0	PCIR_BAR(0)	/* I/O BAR*/
1300 #define AHD_PCI_MEMADDR	PCIR_BAR(1)	/* Memory BAR */
1301 #define AHD_PCI_IOADDR1	PCIR_BAR(3)	/* Second I/O BAR */
1302 
1303 typedef int (ahd_device_setup_t)(struct ahd_softc *);
1304 
1305 struct ahd_pci_identity {
1306 	uint64_t		 full_id;
1307 	uint64_t		 id_mask;
1308 	const char		*name;
1309 	ahd_device_setup_t	*setup;
1310 };
1311 
1312 /***************************** VL/EISA Declarations ***************************/
1313 struct aic7770_identity {
1314 	uint32_t		 full_id;
1315 	uint32_t		 id_mask;
1316 	const char		*name;
1317 	ahd_device_setup_t	*setup;
1318 };
1319 extern struct aic7770_identity aic7770_ident_table [];
1320 extern const int ahd_num_aic7770_devs;
1321 
1322 #define AHD_EISA_SLOT_OFFSET	0xc00
1323 #define AHD_EISA_IOSIZE		0x100
1324 
1325 /*************************** Function Declarations ****************************/
1326 /******************************************************************************/
1327 
1328 /***************************** PCI Front End *********************************/
1329 const struct	ahd_pci_identity *ahd_find_pci_device(ahd_dev_softc_t);
1330 int			  ahd_pci_config(struct ahd_softc *,
1331 					 const struct ahd_pci_identity *);
1332 int	ahd_pci_test_register_access(struct ahd_softc *);
1333 void __maybe_unused	ahd_pci_suspend(struct ahd_softc *);
1334 void __maybe_unused	ahd_pci_resume(struct ahd_softc *);
1335 
1336 /************************** SCB and SCB queue management **********************/
1337 void		ahd_qinfifo_requeue_tail(struct ahd_softc *ahd,
1338 					 struct scb *scb);
1339 
1340 /****************************** Initialization ********************************/
1341 struct ahd_softc	*ahd_alloc(void *platform_arg, char *name);
1342 int			 ahd_softc_init(struct ahd_softc *);
1343 void			 ahd_controller_info(struct ahd_softc *ahd, char *buf);
1344 int			 ahd_init(struct ahd_softc *ahd);
1345 int __maybe_unused	 ahd_suspend(struct ahd_softc *ahd);
1346 void __maybe_unused	 ahd_resume(struct ahd_softc *ahd);
1347 int			 ahd_default_config(struct ahd_softc *ahd);
1348 int			 ahd_parse_vpddata(struct ahd_softc *ahd,
1349 					   struct vpd_config *vpd);
1350 int			 ahd_parse_cfgdata(struct ahd_softc *ahd,
1351 					   struct seeprom_config *sc);
1352 void			 ahd_intr_enable(struct ahd_softc *ahd, int enable);
1353 void			 ahd_pause_and_flushwork(struct ahd_softc *ahd);
1354 void			 ahd_set_unit(struct ahd_softc *, int);
1355 void			 ahd_set_name(struct ahd_softc *, char *);
1356 struct scb		*ahd_get_scb(struct ahd_softc *ahd, u_int col_idx);
1357 void			 ahd_free_scb(struct ahd_softc *ahd, struct scb *scb);
1358 void			 ahd_free(struct ahd_softc *ahd);
1359 int			 ahd_reset(struct ahd_softc *ahd, int reinit);
1360 int			 ahd_write_flexport(struct ahd_softc *ahd,
1361 					    u_int addr, u_int value);
1362 int			 ahd_read_flexport(struct ahd_softc *ahd, u_int addr,
1363 					   uint8_t *value);
1364 
1365 /***************************** Error Recovery *********************************/
1366 typedef enum {
1367 	SEARCH_COMPLETE,
1368 	SEARCH_COUNT,
1369 	SEARCH_REMOVE,
1370 	SEARCH_PRINT
1371 } ahd_search_action;
1372 int			ahd_search_qinfifo(struct ahd_softc *ahd, int target,
1373 					   char channel, int lun, u_int tag,
1374 					   role_t role, uint32_t status,
1375 					   ahd_search_action action);
1376 int			ahd_search_disc_list(struct ahd_softc *ahd, int target,
1377 					     char channel, int lun, u_int tag,
1378 					     int stop_on_first, int remove,
1379 					     int save_state);
1380 int			ahd_reset_channel(struct ahd_softc *ahd, char channel,
1381 					  int initiate_reset);
1382 /*************************** Utility Functions ********************************/
1383 void			ahd_compile_devinfo(struct ahd_devinfo *devinfo,
1384 					    u_int our_id, u_int target,
1385 					    u_int lun, char channel,
1386 					    role_t role);
1387 /************************** Transfer Negotiation ******************************/
1388 void			ahd_find_syncrate(struct ahd_softc *ahd, u_int *period,
1389 					  u_int *ppr_options, u_int maxsync);
1390 /*
1391  * Negotiation types.  These are used to qualify if we should renegotiate
1392  * even if our goal and current transport parameters are identical.
1393  */
1394 typedef enum {
1395 	AHD_NEG_TO_GOAL,	/* Renegotiate only if goal and curr differ. */
1396 	AHD_NEG_IF_NON_ASYNC,	/* Renegotiate so long as goal is non-async. */
1397 	AHD_NEG_ALWAYS		/* Renegotiat even if goal is async. */
1398 } ahd_neg_type;
1399 int			ahd_update_neg_request(struct ahd_softc*,
1400 					       struct ahd_devinfo*,
1401 					       struct ahd_tmode_tstate*,
1402 					       struct ahd_initiator_tinfo*,
1403 					       ahd_neg_type);
1404 void			ahd_set_width(struct ahd_softc *ahd,
1405 				      struct ahd_devinfo *devinfo,
1406 				      u_int width, u_int type, int paused);
1407 void			ahd_set_syncrate(struct ahd_softc *ahd,
1408 					 struct ahd_devinfo *devinfo,
1409 					 u_int period, u_int offset,
1410 					 u_int ppr_options,
1411 					 u_int type, int paused);
1412 typedef enum {
1413 	AHD_QUEUE_NONE,
1414 	AHD_QUEUE_BASIC,
1415 	AHD_QUEUE_TAGGED
1416 } ahd_queue_alg;
1417 
1418 /**************************** Target Mode *************************************/
1419 #ifdef AHD_TARGET_MODE
1420 void		ahd_send_lstate_events(struct ahd_softc *,
1421 				       struct ahd_tmode_lstate *);
1422 void		ahd_handle_en_lun(struct ahd_softc *ahd,
1423 				  struct cam_sim *sim, union ccb *ccb);
1424 cam_status	ahd_find_tmode_devs(struct ahd_softc *ahd,
1425 				    struct cam_sim *sim, union ccb *ccb,
1426 				    struct ahd_tmode_tstate **tstate,
1427 				    struct ahd_tmode_lstate **lstate,
1428 				    int notfound_failure);
1429 #ifndef AHD_TMODE_ENABLE
1430 #define AHD_TMODE_ENABLE 0
1431 #endif
1432 #endif
1433 /******************************* Debug ***************************************/
1434 #ifdef AHD_DEBUG
1435 extern uint32_t ahd_debug;
1436 #define AHD_SHOW_MISC		0x00001
1437 #define AHD_SHOW_SENSE		0x00002
1438 #define AHD_SHOW_RECOVERY	0x00004
1439 #define AHD_DUMP_SEEPROM	0x00008
1440 #define AHD_SHOW_TERMCTL	0x00010
1441 #define AHD_SHOW_MEMORY		0x00020
1442 #define AHD_SHOW_MESSAGES	0x00040
1443 #define AHD_SHOW_MODEPTR	0x00080
1444 #define AHD_SHOW_SELTO		0x00100
1445 #define AHD_SHOW_FIFOS		0x00200
1446 #define AHD_SHOW_QFULL		0x00400
1447 #define	AHD_SHOW_DV		0x00800
1448 #define AHD_SHOW_MASKED_ERRORS	0x01000
1449 #define AHD_SHOW_QUEUE		0x02000
1450 #define AHD_SHOW_TQIN		0x04000
1451 #define AHD_SHOW_SG		0x08000
1452 #define AHD_SHOW_INT_COALESCING	0x10000
1453 #define AHD_DEBUG_SEQUENCER	0x20000
1454 #endif
1455 void			ahd_print_devinfo(struct ahd_softc *ahd,
1456 					  struct ahd_devinfo *devinfo);
1457 void			ahd_dump_card_state(struct ahd_softc *ahd);
1458 int			ahd_print_register(const ahd_reg_parse_entry_t *table,
1459 					   u_int num_entries,
1460 					   const char *name,
1461 					   u_int address,
1462 					   u_int value,
1463 					   u_int *cur_column,
1464 					   u_int wrap_point);
1465 #endif /* _AIC79XX_H_ */
1466