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aic79xx.h
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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  (((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 #ifndef __linux__
611  bus_dmamap_t dmamap;
612 #endif
613  struct scb_platform_data *platform_data;
614  struct map_node *hscb_map;
615  struct map_node *sg_map;
616  struct map_node *sense_map;
617  void *sg_list;
618  uint8_t *sense_data;
619  dma_addr_t sg_list_busaddr;
620  dma_addr_t sense_busaddr;
621  u_int sg_count;/* How full ahd_dma_seg is */
622 #define AHD_MAX_LQ_CRC_ERRORS 5
623  u_int crc_retry_count;
624 };
625 
626 TAILQ_HEAD(scb_tailq, scb);
627 LIST_HEAD(scb_list, scb);
628 
629 struct scb_data {
630  /*
631  * TAILQ of lists of free SCBs grouped by device
632  * collision domains.
633  */
634  struct scb_tailq free_scbs;
635 
636  /*
637  * Per-device lists of SCBs whose tag ID would collide
638  * with an already active tag on the device.
639  */
640  struct scb_list free_scb_lists[AHD_NUM_TARGETS * AHD_NUM_LUNS_NONPKT];
641 
642  /*
643  * SCBs that will not collide with any active device.
644  */
645  struct scb_list any_dev_free_scb_list;
646 
647  /*
648  * Mapping from tag to SCB.
649  */
650  struct scb *scbindex[AHD_SCB_MAX];
651 
652  /*
653  * "Bus" addresses of our data structures.
654  */
655  bus_dma_tag_t hscb_dmat; /* dmat for our hardware SCB array */
656  bus_dma_tag_t sg_dmat; /* dmat for our sg segments */
657  bus_dma_tag_t sense_dmat; /* dmat for our sense buffers */
658  SLIST_HEAD(, map_node) hscb_maps;
659  SLIST_HEAD(, map_node) sg_maps;
660  SLIST_HEAD(, map_node) sense_maps;
661  int scbs_left; /* unallocated scbs in head map_node */
662  int sgs_left; /* unallocated sgs in head map_node */
663  int sense_left; /* unallocated sense in head map_node */
664  uint16_t numscbs;
665  uint16_t maxhscbs; /* Number of SCBs on the card */
666  uint8_t init_level; /*
667  * How far we've initialized
668  * this structure.
669  */
670 };
671 
672 /************************ Target Mode Definitions *****************************/
673 
674 /*
675  * Connection descriptor for select-in requests in target mode.
676  */
677 struct target_cmd {
678  uint8_t scsiid; /* Our ID and the initiator's ID */
679  uint8_t identify; /* Identify message */
680  uint8_t bytes[22]; /*
681  * Bytes contains any additional message
682  * bytes terminated by 0xFF. The remainder
683  * is the cdb to execute.
684  */
685  uint8_t cmd_valid; /*
686  * When a command is complete, the firmware
687  * will set cmd_valid to all bits set.
688  * After the host has seen the command,
689  * the bits are cleared. This allows us
690  * to just peek at host memory to determine
691  * if more work is complete. cmd_valid is on
692  * an 8 byte boundary to simplify setting
693  * it on aic7880 hardware which only has
694  * limited direct access to the DMA FIFO.
695  */
696  uint8_t pad[7];
697 };
698 
699 /*
700  * Number of events we can buffer up if we run out
701  * of immediate notify ccbs.
702  */
703 #define AHD_TMODE_EVENT_BUFFER_SIZE 8
704 struct ahd_tmode_event {
705  uint8_t initiator_id;
706  uint8_t event_type; /* MSG type or EVENT_TYPE_BUS_RESET */
707 #define EVENT_TYPE_BUS_RESET 0xFF
708  uint8_t event_arg;
709 };
710 
711 /*
712  * Per enabled lun target mode state.
713  * As this state is directly influenced by the host OS'es target mode
714  * environment, we let the OS module define it. Forward declare the
715  * structure here so we can store arrays of them, etc. in OS neutral
716  * data structures.
717  */
718 #ifdef AHD_TARGET_MODE
719 struct ahd_tmode_lstate {
720  struct cam_path *path;
721  struct ccb_hdr_slist accept_tios;
722  struct ccb_hdr_slist immed_notifies;
723  struct ahd_tmode_event event_buffer[AHD_TMODE_EVENT_BUFFER_SIZE];
724  uint8_t event_r_idx;
725  uint8_t event_w_idx;
726 };
727 #else
728 struct ahd_tmode_lstate;
729 #endif
730 
731 /******************** Transfer Negotiation Datastructures *********************/
732 #define AHD_TRANS_CUR 0x01 /* Modify current neogtiation status */
733 #define AHD_TRANS_ACTIVE 0x03 /* Assume this target is on the bus */
734 #define AHD_TRANS_GOAL 0x04 /* Modify negotiation goal */
735 #define AHD_TRANS_USER 0x08 /* Modify user negotiation settings */
736 #define AHD_PERIOD_10MHz 0x19
737 
738 #define AHD_WIDTH_UNKNOWN 0xFF
739 #define AHD_PERIOD_UNKNOWN 0xFF
740 #define AHD_OFFSET_UNKNOWN 0xFF
741 #define AHD_PPR_OPTS_UNKNOWN 0xFF
742 
743 /*
744  * Transfer Negotiation Information.
745  */
746 struct ahd_transinfo {
747  uint8_t protocol_version; /* SCSI Revision level */
748  uint8_t transport_version; /* SPI Revision level */
749  uint8_t width; /* Bus width */
750  uint8_t period; /* Sync rate factor */
751  uint8_t offset; /* Sync offset */
752  uint8_t ppr_options; /* Parallel Protocol Request options */
753 };
754 
755 /*
756  * Per-initiator current, goal and user transfer negotiation information. */
757 struct ahd_initiator_tinfo {
758  struct ahd_transinfo curr;
759  struct ahd_transinfo goal;
760  struct ahd_transinfo user;
761 };
762 
763 /*
764  * Per enabled target ID state.
765  * Pointers to lun target state as well as sync/wide negotiation information
766  * for each initiator<->target mapping. For the initiator role we pretend
767  * that we are the target and the targets are the initiators since the
768  * negotiation is the same regardless of role.
769  */
770 struct ahd_tmode_tstate {
771  struct ahd_tmode_lstate* enabled_luns[AHD_NUM_LUNS];
772  struct ahd_initiator_tinfo transinfo[AHD_NUM_TARGETS];
773 
774  /*
775  * Per initiator state bitmasks.
776  */
777  uint16_t auto_negotiate;/* Auto Negotiation Required */
778  uint16_t discenable; /* Disconnection allowed */
779  uint16_t tagenable; /* Tagged Queuing allowed */
780 };
781 
782 /*
783  * Points of interest along the negotiated transfer scale.
784  */
785 #define AHD_SYNCRATE_160 0x8
786 #define AHD_SYNCRATE_PACED 0x8
787 #define AHD_SYNCRATE_DT 0x9
788 #define AHD_SYNCRATE_ULTRA2 0xa
789 #define AHD_SYNCRATE_ULTRA 0xc
790 #define AHD_SYNCRATE_FAST 0x19
791 #define AHD_SYNCRATE_MIN_DT AHD_SYNCRATE_FAST
792 #define AHD_SYNCRATE_SYNC 0x32
793 #define AHD_SYNCRATE_MIN 0x60
794 #define AHD_SYNCRATE_ASYNC 0xFF
795 #define AHD_SYNCRATE_MAX AHD_SYNCRATE_160
796 
797 /* Safe and valid period for async negotiations. */
798 #define AHD_ASYNC_XFER_PERIOD 0x44
799 
800 /*
801  * In RevA, the synctable uses a 120MHz rate for the period
802  * factor 8 and 160MHz for the period factor 7. The 120MHz
803  * rate never made it into the official SCSI spec, so we must
804  * compensate when setting the negotiation table for Rev A
805  * parts.
806  */
807 #define AHD_SYNCRATE_REVA_120 0x8
808 #define AHD_SYNCRATE_REVA_160 0x7
809 
810 /***************************** Lookup Tables **********************************/
811 /*
812  * Phase -> name and message out response
813  * to parity errors in each phase table.
814  */
815 struct ahd_phase_table_entry {
816  uint8_t phase;
817  uint8_t mesg_out; /* Message response to parity errors */
818  const char *phasemsg;
819 };
820 
821 /************************** Serial EEPROM Format ******************************/
822 
823 struct seeprom_config {
824 /*
825  * Per SCSI ID Configuration Flags
826  */
827  uint16_t device_flags[16]; /* words 0-15 */
828 #define CFXFER 0x003F /* synchronous transfer rate */
829 #define CFXFER_ASYNC 0x3F
830 #define CFQAS 0x0040 /* Negotiate QAS */
831 #define CFPACKETIZED 0x0080 /* Negotiate Packetized Transfers */
832 #define CFSTART 0x0100 /* send start unit SCSI command */
833 #define CFINCBIOS 0x0200 /* include in BIOS scan */
834 #define CFDISC 0x0400 /* enable disconnection */
835 #define CFMULTILUNDEV 0x0800 /* Probe multiple luns in BIOS scan */
836 #define CFWIDEB 0x1000 /* wide bus device */
837 #define CFHOSTMANAGED 0x8000 /* Managed by a RAID controller */
838 
839 /*
840  * BIOS Control Bits
841  */
842  uint16_t bios_control; /* word 16 */
843 #define CFSUPREM 0x0001 /* support all removeable drives */
844 #define CFSUPREMB 0x0002 /* support removeable boot drives */
845 #define CFBIOSSTATE 0x000C /* BIOS Action State */
846 #define CFBS_DISABLED 0x00
847 #define CFBS_ENABLED 0x04
848 #define CFBS_DISABLED_SCAN 0x08
849 #define CFENABLEDV 0x0010 /* Perform Domain Validation */
850 #define CFCTRL_A 0x0020 /* BIOS displays Ctrl-A message */
851 #define CFSPARITY 0x0040 /* SCSI parity */
852 #define CFEXTEND 0x0080 /* extended translation enabled */
853 #define CFBOOTCD 0x0100 /* Support Bootable CD-ROM */
854 #define CFMSG_LEVEL 0x0600 /* BIOS Message Level */
855 #define CFMSG_VERBOSE 0x0000
856 #define CFMSG_SILENT 0x0200
857 #define CFMSG_DIAG 0x0400
858 #define CFRESETB 0x0800 /* reset SCSI bus at boot */
859 /* UNUSED 0xf000 */
860 
861 /*
862  * Host Adapter Control Bits
863  */
864  uint16_t adapter_control; /* word 17 */
865 #define CFAUTOTERM 0x0001 /* Perform Auto termination */
866 #define CFSTERM 0x0002 /* SCSI low byte termination */
867 #define CFWSTERM 0x0004 /* SCSI high byte termination */
868 #define CFSEAUTOTERM 0x0008 /* Ultra2 Perform secondary Auto Term*/
869 #define CFSELOWTERM 0x0010 /* Ultra2 secondary low term */
870 #define CFSEHIGHTERM 0x0020 /* Ultra2 secondary high term */
871 #define CFSTPWLEVEL 0x0040 /* Termination level control */
872 #define CFBIOSAUTOTERM 0x0080 /* Perform Auto termination */
873 #define CFTERM_MENU 0x0100 /* BIOS displays termination menu */
874 #define CFCLUSTERENB 0x8000 /* Cluster Enable */
875 
876 /*
877  * Bus Release Time, Host Adapter ID
878  */
879  uint16_t brtime_id; /* word 18 */
880 #define CFSCSIID 0x000f /* host adapter SCSI ID */
881 /* UNUSED 0x00f0 */
882 #define CFBRTIME 0xff00 /* bus release time/PCI Latency Time */
883 
884 /*
885  * Maximum targets
886  */
887  uint16_t max_targets; /* word 19 */
888 #define CFMAXTARG 0x00ff /* maximum targets */
889 #define CFBOOTLUN 0x0f00 /* Lun to boot from */
890 #define CFBOOTID 0xf000 /* Target to boot from */
891  uint16_t res_1[10]; /* words 20-29 */
892  uint16_t signature; /* BIOS Signature */
893 #define CFSIGNATURE 0x400
894  uint16_t checksum; /* word 31 */
895 };
896 
897 /*
898  * Vital Product Data used during POST and by the BIOS.
899  */
900 struct vpd_config {
901  uint8_t bios_flags;
902 #define VPDMASTERBIOS 0x0001
903 #define VPDBOOTHOST 0x0002
904  uint8_t reserved_1[21];
905  uint8_t resource_type;
906  uint8_t resource_len[2];
907  uint8_t resource_data[8];
908  uint8_t vpd_tag;
909  uint16_t vpd_len;
910  uint8_t vpd_keyword[2];
911  uint8_t length;
912  uint8_t revision;
913  uint8_t device_flags;
914  uint8_t termnation_menus[2];
915  uint8_t fifo_threshold;
916  uint8_t end_tag;
917  uint8_t vpd_checksum;
918  uint16_t default_target_flags;
919  uint16_t default_bios_flags;
920  uint16_t default_ctrl_flags;
921  uint8_t default_irq;
922  uint8_t pci_lattime;
923  uint8_t max_target;
924  uint8_t boot_lun;
925  uint16_t signature;
926  uint8_t reserved_2;
927  uint8_t checksum;
928  uint8_t reserved_3[4];
929 };
930 
931 /****************************** Flexport Logic ********************************/
932 #define FLXADDR_TERMCTL 0x0
933 #define FLX_TERMCTL_ENSECHIGH 0x8
934 #define FLX_TERMCTL_ENSECLOW 0x4
935 #define FLX_TERMCTL_ENPRIHIGH 0x2
936 #define FLX_TERMCTL_ENPRILOW 0x1
937 #define FLXADDR_ROMSTAT_CURSENSECTL 0x1
938 #define FLX_ROMSTAT_SEECFG 0xF0
939 #define FLX_ROMSTAT_EECFG 0x0F
940 #define FLX_ROMSTAT_SEE_93C66 0x00
941 #define FLX_ROMSTAT_SEE_NONE 0xF0
942 #define FLX_ROMSTAT_EE_512x8 0x0
943 #define FLX_ROMSTAT_EE_1MBx8 0x1
944 #define FLX_ROMSTAT_EE_2MBx8 0x2
945 #define FLX_ROMSTAT_EE_4MBx8 0x3
946 #define FLX_ROMSTAT_EE_16MBx8 0x4
947 #define CURSENSE_ENB 0x1
948 #define FLXADDR_FLEXSTAT 0x2
949 #define FLX_FSTAT_BUSY 0x1
950 #define FLXADDR_CURRENT_STAT 0x4
951 #define FLX_CSTAT_SEC_HIGH 0xC0
952 #define FLX_CSTAT_SEC_LOW 0x30
953 #define FLX_CSTAT_PRI_HIGH 0x0C
954 #define FLX_CSTAT_PRI_LOW 0x03
955 #define FLX_CSTAT_MASK 0x03
956 #define FLX_CSTAT_SHIFT 2
957 #define FLX_CSTAT_OKAY 0x0
958 #define FLX_CSTAT_OVER 0x1
959 #define FLX_CSTAT_UNDER 0x2
960 #define FLX_CSTAT_INVALID 0x3
961 
962 int ahd_read_seeprom(struct ahd_softc *ahd, uint16_t *buf,
963  u_int start_addr, u_int count, int bstream);
964 
965 int ahd_write_seeprom(struct ahd_softc *ahd, uint16_t *buf,
966  u_int start_addr, u_int count);
967 int ahd_verify_cksum(struct seeprom_config *sc);
968 int ahd_acquire_seeprom(struct ahd_softc *ahd);
969 void ahd_release_seeprom(struct ahd_softc *ahd);
970 
971 /**************************** Message Buffer *********************************/
972 typedef enum {
973  MSG_FLAG_NONE = 0x00,
974  MSG_FLAG_EXPECT_PPR_BUSFREE = 0x01,
975  MSG_FLAG_IU_REQ_CHANGED = 0x02,
976  MSG_FLAG_EXPECT_IDE_BUSFREE = 0x04,
977  MSG_FLAG_EXPECT_QASREJ_BUSFREE = 0x08,
978  MSG_FLAG_PACKETIZED = 0x10
979 } ahd_msg_flags;
980 
981 typedef enum {
982  MSG_TYPE_NONE = 0x00,
983  MSG_TYPE_INITIATOR_MSGOUT = 0x01,
984  MSG_TYPE_INITIATOR_MSGIN = 0x02,
985  MSG_TYPE_TARGET_MSGOUT = 0x03,
986  MSG_TYPE_TARGET_MSGIN = 0x04
987 } ahd_msg_type;
988 
989 typedef enum {
990  MSGLOOP_IN_PROG,
991  MSGLOOP_MSGCOMPLETE,
992  MSGLOOP_TERMINATED
993 } msg_loop_stat;
994 
995 /*********************** Software Configuration Structure *********************/
996 struct ahd_suspend_channel_state {
997  uint8_t scsiseq;
998  uint8_t sxfrctl0;
999  uint8_t sxfrctl1;
1000  uint8_t simode0;
1001  uint8_t simode1;
1002  uint8_t seltimer;
1003  uint8_t seqctl;
1004 };
1005 
1006 struct ahd_suspend_pci_state {
1007  uint32_t devconfig;
1008  uint8_t command;
1009  uint8_t csize_lattime;
1010 };
1011 
1012 struct ahd_suspend_state {
1013  struct ahd_suspend_channel_state channel[2];
1014  struct ahd_suspend_pci_state pci_state;
1015  uint8_t optionmode;
1016  uint8_t dscommand0;
1017  uint8_t dspcistatus;
1018  /* hsmailbox */
1019  uint8_t crccontrol1;
1020  uint8_t scbbaddr;
1021  /* Host and sequencer SCB counts */
1022  uint8_t dff_thrsh;
1023  uint8_t *scratch_ram;
1024  uint8_t *btt;
1025 };
1026 
1027 typedef void (*ahd_bus_intr_t)(struct ahd_softc *);
1028 
1029 typedef enum {
1030  AHD_MODE_DFF0,
1031  AHD_MODE_DFF1,
1032  AHD_MODE_CCHAN,
1033  AHD_MODE_SCSI,
1034  AHD_MODE_CFG,
1035  AHD_MODE_UNKNOWN
1036 } ahd_mode;
1037 
1038 #define AHD_MK_MSK(x) (0x01 << (x))
1039 #define AHD_MODE_DFF0_MSK AHD_MK_MSK(AHD_MODE_DFF0)
1040 #define AHD_MODE_DFF1_MSK AHD_MK_MSK(AHD_MODE_DFF1)
1041 #define AHD_MODE_CCHAN_MSK AHD_MK_MSK(AHD_MODE_CCHAN)
1042 #define AHD_MODE_SCSI_MSK AHD_MK_MSK(AHD_MODE_SCSI)
1043 #define AHD_MODE_CFG_MSK AHD_MK_MSK(AHD_MODE_CFG)
1044 #define AHD_MODE_UNKNOWN_MSK AHD_MK_MSK(AHD_MODE_UNKNOWN)
1045 #define AHD_MODE_ANY_MSK (~0)
1046 
1047 typedef uint8_t ahd_mode_state;
1048 
1049 typedef void ahd_callback_t (void *);
1050 
1051 struct ahd_completion
1052 {
1053  uint16_t tag;
1054  uint8_t sg_status;
1055  uint8_t valid_tag;
1056 };
1057 
1058 struct ahd_softc {
1059  bus_space_tag_t tags[2];
1060  bus_space_handle_t bshs[2];
1061 #ifndef __linux__
1062  bus_dma_tag_t buffer_dmat; /* dmat for buffer I/O */
1063 #endif
1064  struct scb_data scb_data;
1065 
1066  struct hardware_scb *next_queued_hscb;
1067  struct map_node *next_queued_hscb_map;
1068 
1069  /*
1070  * SCBs that have been sent to the controller
1071  */
1072  LIST_HEAD(, scb) pending_scbs;
1073 
1074  /*
1075  * Current register window mode information.
1076  */
1077  ahd_mode dst_mode;
1078  ahd_mode src_mode;
1079 
1080  /*
1081  * Saved register window mode information
1082  * used for restore on next unpause.
1083  */
1084  ahd_mode saved_dst_mode;
1085  ahd_mode saved_src_mode;
1086 
1087  /*
1088  * Platform specific data.
1089  */
1090  struct ahd_platform_data *platform_data;
1091 
1092  /*
1093  * Platform specific device information.
1094  */
1095  ahd_dev_softc_t dev_softc;
1096 
1097  /*
1098  * Bus specific device information.
1099  */
1100  ahd_bus_intr_t bus_intr;
1101 
1102  /*
1103  * Target mode related state kept on a per enabled lun basis.
1104  * Targets that are not enabled will have null entries.
1105  * As an initiator, we keep one target entry for our initiator
1106  * ID to store our sync/wide transfer settings.
1107  */
1108  struct ahd_tmode_tstate *enabled_targets[AHD_NUM_TARGETS];
1109 
1110  /*
1111  * The black hole device responsible for handling requests for
1112  * disabled luns on enabled targets.
1113  */
1114  struct ahd_tmode_lstate *black_hole;
1115 
1116  /*
1117  * Device instance currently on the bus awaiting a continue TIO
1118  * for a command that was not given the disconnect priveledge.
1119  */
1120  struct ahd_tmode_lstate *pending_device;
1121 
1122  /*
1123  * Timer handles for timer driven callbacks.
1124  */
1125  ahd_timer_t reset_timer;
1126  ahd_timer_t stat_timer;
1127 
1128  /*
1129  * Statistics.
1130  */
1131 #define AHD_STAT_UPDATE_US 250000 /* 250ms */
1132 #define AHD_STAT_BUCKETS 4
1133  u_int cmdcmplt_bucket;
1134  uint32_t cmdcmplt_counts[AHD_STAT_BUCKETS];
1135  uint32_t cmdcmplt_total;
1136 
1137  /*
1138  * Card characteristics
1139  */
1140  ahd_chip chip;
1141  ahd_feature features;
1142  ahd_bug bugs;
1143  ahd_flag flags;
1144  struct seeprom_config *seep_config;
1145 
1146  /* Command Queues */
1147  struct ahd_completion *qoutfifo;
1148  uint16_t qoutfifonext;
1149  uint16_t qoutfifonext_valid_tag;
1150  uint16_t qinfifonext;
1151  uint16_t qinfifo[AHD_SCB_MAX];
1152 
1153  /*
1154  * Our qfreeze count. The sequencer compares
1155  * this value with its own counter to determine
1156  * whether to allow selections to occur.
1157  */
1158  uint16_t qfreeze_cnt;
1159 
1160  /* Values to store in the SEQCTL register for pause and unpause */
1161  uint8_t unpause;
1162  uint8_t pause;
1163 
1164  /* Critical Section Data */
1165  struct cs *critical_sections;
1166  u_int num_critical_sections;
1167 
1168  /* Buffer for handling packetized bitbucket. */
1169  uint8_t *overrun_buf;
1170 
1171  /* Links for chaining softcs */
1172  TAILQ_ENTRY(ahd_softc) links;
1173 
1174  /* Channel Names ('A', 'B', etc.) */
1175  char channel;
1176 
1177  /* Initiator Bus ID */
1178  uint8_t our_id;
1179 
1180  /*
1181  * Target incoming command FIFO.
1182  */
1183  struct target_cmd *targetcmds;
1184  uint8_t tqinfifonext;
1185 
1186  /*
1187  * Cached verson of the hs_mailbox so we can avoid
1188  * pausing the sequencer during mailbox updates.
1189  */
1190  uint8_t hs_mailbox;
1191 
1192  /*
1193  * Incoming and outgoing message handling.
1194  */
1195  uint8_t send_msg_perror;
1196  ahd_msg_flags msg_flags;
1197  ahd_msg_type msg_type;
1198  uint8_t msgout_buf[12];/* Message we are sending */
1199  uint8_t msgin_buf[12];/* Message we are receiving */
1200  u_int msgout_len; /* Length of message to send */
1201  u_int msgout_index; /* Current index in msgout */
1202  u_int msgin_index; /* Current index in msgin */
1203 
1204  /*
1205  * Mapping information for data structures shared
1206  * between the sequencer and kernel.
1207  */
1208  bus_dma_tag_t parent_dmat;
1209  bus_dma_tag_t shared_data_dmat;
1210  struct map_node shared_data_map;
1211 
1212  /* Information saved through suspend/resume cycles */
1213  struct ahd_suspend_state suspend_state;
1214 
1215  /* Number of enabled target mode device on this card */
1216  u_int enabled_luns;
1217 
1218  /* Initialization level of this data structure */
1219  u_int init_level;
1220 
1221  /* PCI cacheline size. */
1222  u_int pci_cachesize;
1223 
1224  /* IO Cell Parameters */
1225  uint8_t iocell_opts[AHD_NUM_PER_DEV_ANNEXCOLS];
1226 
1227  u_int stack_size;
1228  uint16_t *saved_stack;
1229 
1230  /* Per-Unit descriptive information */
1231  const char *description;
1232  const char *bus_description;
1233  char *name;
1234  int unit;
1235 
1236  /* Selection Timer settings */
1237  int seltime;
1238 
1239  /*
1240  * Interrupt coalescing settings.
1241  */
1242 #define AHD_INT_COALESCING_TIMER_DEFAULT 250 /*us*/
1243 #define AHD_INT_COALESCING_MAXCMDS_DEFAULT 10
1244 #define AHD_INT_COALESCING_MAXCMDS_MAX 127
1245 #define AHD_INT_COALESCING_MINCMDS_DEFAULT 5
1246 #define AHD_INT_COALESCING_MINCMDS_MAX 127
1247 #define AHD_INT_COALESCING_THRESHOLD_DEFAULT 2000
1248 #define AHD_INT_COALESCING_STOP_THRESHOLD_DEFAULT 1000
1249  u_int int_coalescing_timer;
1250  u_int int_coalescing_maxcmds;
1251  u_int int_coalescing_mincmds;
1252  u_int int_coalescing_threshold;
1253  u_int int_coalescing_stop_threshold;
1254 
1255  uint16_t user_discenable;/* Disconnection allowed */
1256  uint16_t user_tagenable;/* Tagged Queuing allowed */
1257 };
1258 
1259 /*************************** IO Cell Configuration ****************************/
1260 #define AHD_PRECOMP_SLEW_INDEX \
1261  (AHD_ANNEXCOL_PRECOMP_SLEW - AHD_ANNEXCOL_PER_DEV0)
1262 
1263 #define AHD_AMPLITUDE_INDEX \
1264  (AHD_ANNEXCOL_AMPLITUDE - AHD_ANNEXCOL_PER_DEV0)
1265 
1266 #define AHD_SET_SLEWRATE(ahd, new_slew) \
1267 do { \
1268  (ahd)->iocell_opts[AHD_PRECOMP_SLEW_INDEX] &= ~AHD_SLEWRATE_MASK; \
1269  (ahd)->iocell_opts[AHD_PRECOMP_SLEW_INDEX] |= \
1270  (((new_slew) << AHD_SLEWRATE_SHIFT) & AHD_SLEWRATE_MASK); \
1271 } while (0)
1272 
1273 #define AHD_SET_PRECOMP(ahd, new_pcomp) \
1274 do { \
1275  (ahd)->iocell_opts[AHD_PRECOMP_SLEW_INDEX] &= ~AHD_PRECOMP_MASK; \
1276  (ahd)->iocell_opts[AHD_PRECOMP_SLEW_INDEX] |= \
1277  (((new_pcomp) << AHD_PRECOMP_SHIFT) & AHD_PRECOMP_MASK); \
1278 } while (0)
1279 
1280 #define AHD_SET_AMPLITUDE(ahd, new_amp) \
1281 do { \
1282  (ahd)->iocell_opts[AHD_AMPLITUDE_INDEX] &= ~AHD_AMPLITUDE_MASK; \
1283  (ahd)->iocell_opts[AHD_AMPLITUDE_INDEX] |= \
1284  (((new_amp) << AHD_AMPLITUDE_SHIFT) & AHD_AMPLITUDE_MASK); \
1285 } while (0)
1286 
1287 /************************ Active Device Information ***************************/
1288 typedef enum {
1289  ROLE_UNKNOWN,
1290  ROLE_INITIATOR,
1291  ROLE_TARGET
1292 } role_t;
1293 
1294 struct ahd_devinfo {
1295  int our_scsiid;
1296  int target_offset;
1297  uint16_t target_mask;
1298  u_int target;
1299  u_int lun;
1300  char channel;
1301  role_t role; /*
1302  * Only guaranteed to be correct if not
1303  * in the busfree state.
1304  */
1305 };
1306 
1307 /****************************** PCI Structures ********************************/
1308 #define AHD_PCI_IOADDR0 PCIR_BAR(0) /* I/O BAR*/
1309 #define AHD_PCI_MEMADDR PCIR_BAR(1) /* Memory BAR */
1310 #define AHD_PCI_IOADDR1 PCIR_BAR(3) /* Second I/O BAR */
1311 
1312 typedef int (ahd_device_setup_t)(struct ahd_softc *);
1313 
1314 struct ahd_pci_identity {
1315  uint64_t full_id;
1316  uint64_t id_mask;
1317  const char *name;
1318  ahd_device_setup_t *setup;
1319 };
1320 
1321 /***************************** VL/EISA Declarations ***************************/
1322 struct aic7770_identity {
1323  uint32_t full_id;
1324  uint32_t id_mask;
1325  const char *name;
1326  ahd_device_setup_t *setup;
1327 };
1328 extern struct aic7770_identity aic7770_ident_table [];
1329 extern const int ahd_num_aic7770_devs;
1330 
1331 #define AHD_EISA_SLOT_OFFSET 0xc00
1332 #define AHD_EISA_IOSIZE 0x100
1333 
1334 /*************************** Function Declarations ****************************/
1335 /******************************************************************************/
1336 
1337 /***************************** PCI Front End *********************************/
1338 const struct ahd_pci_identity *ahd_find_pci_device(ahd_dev_softc_t);
1339 int ahd_pci_config(struct ahd_softc *,
1340  const struct ahd_pci_identity *);
1341 int ahd_pci_test_register_access(struct ahd_softc *);
1342 #ifdef CONFIG_PM
1343 void ahd_pci_suspend(struct ahd_softc *);
1344 void ahd_pci_resume(struct ahd_softc *);
1345 #endif
1346 
1347 /************************** SCB and SCB queue management **********************/
1348 void ahd_qinfifo_requeue_tail(struct ahd_softc *ahd,
1349  struct scb *scb);
1350 
1351 /****************************** Initialization ********************************/
1352 struct ahd_softc *ahd_alloc(void *platform_arg, char *name);
1353 int ahd_softc_init(struct ahd_softc *);
1354 void ahd_controller_info(struct ahd_softc *ahd, char *buf);
1355 int ahd_init(struct ahd_softc *ahd);
1356 #ifdef CONFIG_PM
1357 int ahd_suspend(struct ahd_softc *ahd);
1358 void ahd_resume(struct ahd_softc *ahd);
1359 #endif
1360 int ahd_default_config(struct ahd_softc *ahd);
1361 int ahd_parse_vpddata(struct ahd_softc *ahd,
1362  struct vpd_config *vpd);
1363 int ahd_parse_cfgdata(struct ahd_softc *ahd,
1364  struct seeprom_config *sc);
1365 void ahd_intr_enable(struct ahd_softc *ahd, int enable);
1366 void ahd_pause_and_flushwork(struct ahd_softc *ahd);
1367 void ahd_set_unit(struct ahd_softc *, int);
1368 void ahd_set_name(struct ahd_softc *, char *);
1369 struct scb *ahd_get_scb(struct ahd_softc *ahd, u_int col_idx);
1370 void ahd_free_scb(struct ahd_softc *ahd, struct scb *scb);
1371 void ahd_free(struct ahd_softc *ahd);
1372 int ahd_reset(struct ahd_softc *ahd, int reinit);
1373 int ahd_write_flexport(struct ahd_softc *ahd,
1374  u_int addr, u_int value);
1375 int ahd_read_flexport(struct ahd_softc *ahd, u_int addr,
1376  uint8_t *value);
1377 
1378 /***************************** Error Recovery *********************************/
1379 typedef enum {
1380  SEARCH_COMPLETE,
1381  SEARCH_COUNT,
1382  SEARCH_REMOVE,
1383  SEARCH_PRINT
1384 } ahd_search_action;
1385 int ahd_search_qinfifo(struct ahd_softc *ahd, int target,
1386  char channel, int lun, u_int tag,
1387  role_t role, uint32_t status,
1388  ahd_search_action action);
1389 int ahd_search_disc_list(struct ahd_softc *ahd, int target,
1390  char channel, int lun, u_int tag,
1391  int stop_on_first, int remove,
1392  int save_state);
1393 int ahd_reset_channel(struct ahd_softc *ahd, char channel,
1394  int initiate_reset);
1395 /*************************** Utility Functions ********************************/
1396 void ahd_compile_devinfo(struct ahd_devinfo *devinfo,
1397  u_int our_id, u_int target,
1398  u_int lun, char channel,
1399  role_t role);
1400 /************************** Transfer Negotiation ******************************/
1401 void ahd_find_syncrate(struct ahd_softc *ahd, u_int *period,
1402  u_int *ppr_options, u_int maxsync);
1403 /*
1404  * Negotiation types. These are used to qualify if we should renegotiate
1405  * even if our goal and current transport parameters are identical.
1406  */
1407 typedef enum {
1408  AHD_NEG_TO_GOAL, /* Renegotiate only if goal and curr differ. */
1409  AHD_NEG_IF_NON_ASYNC, /* Renegotiate so long as goal is non-async. */
1410  AHD_NEG_ALWAYS /* Renegotiat even if goal is async. */
1411 } ahd_neg_type;
1412 int ahd_update_neg_request(struct ahd_softc*,
1413  struct ahd_devinfo*,
1414  struct ahd_tmode_tstate*,
1415  struct ahd_initiator_tinfo*,
1416  ahd_neg_type);
1417 void ahd_set_width(struct ahd_softc *ahd,
1418  struct ahd_devinfo *devinfo,
1419  u_int width, u_int type, int paused);
1420 void ahd_set_syncrate(struct ahd_softc *ahd,
1421  struct ahd_devinfo *devinfo,
1422  u_int period, u_int offset,
1423  u_int ppr_options,
1424  u_int type, int paused);
1425 typedef enum {
1426  AHD_QUEUE_NONE,
1427  AHD_QUEUE_BASIC,
1428  AHD_QUEUE_TAGGED
1429 } ahd_queue_alg;
1430 
1431 /**************************** Target Mode *************************************/
1432 #ifdef AHD_TARGET_MODE
1433 void ahd_send_lstate_events(struct ahd_softc *,
1434  struct ahd_tmode_lstate *);
1435 void ahd_handle_en_lun(struct ahd_softc *ahd,
1436  struct cam_sim *sim, union ccb *ccb);
1437 cam_status ahd_find_tmode_devs(struct ahd_softc *ahd,
1438  struct cam_sim *sim, union ccb *ccb,
1439  struct ahd_tmode_tstate **tstate,
1440  struct ahd_tmode_lstate **lstate,
1441  int notfound_failure);
1442 #ifndef AHD_TMODE_ENABLE
1443 #define AHD_TMODE_ENABLE 0
1444 #endif
1445 #endif
1446 /******************************* Debug ***************************************/
1447 #ifdef AHD_DEBUG
1448 extern uint32_t ahd_debug;
1449 #define AHD_SHOW_MISC 0x00001
1450 #define AHD_SHOW_SENSE 0x00002
1451 #define AHD_SHOW_RECOVERY 0x00004
1452 #define AHD_DUMP_SEEPROM 0x00008
1453 #define AHD_SHOW_TERMCTL 0x00010
1454 #define AHD_SHOW_MEMORY 0x00020
1455 #define AHD_SHOW_MESSAGES 0x00040
1456 #define AHD_SHOW_MODEPTR 0x00080
1457 #define AHD_SHOW_SELTO 0x00100
1458 #define AHD_SHOW_FIFOS 0x00200
1459 #define AHD_SHOW_QFULL 0x00400
1460 #define AHD_SHOW_DV 0x00800
1461 #define AHD_SHOW_MASKED_ERRORS 0x01000
1462 #define AHD_SHOW_QUEUE 0x02000
1463 #define AHD_SHOW_TQIN 0x04000
1464 #define AHD_SHOW_SG 0x08000
1465 #define AHD_SHOW_INT_COALESCING 0x10000
1466 #define AHD_DEBUG_SEQUENCER 0x20000
1467 #endif
1468 void ahd_print_devinfo(struct ahd_softc *ahd,
1469  struct ahd_devinfo *devinfo);
1470 void ahd_dump_card_state(struct ahd_softc *ahd);
1471 int ahd_print_register(const ahd_reg_parse_entry_t *table,
1472  u_int num_entries,
1473  const char *name,
1474  u_int address,
1475  u_int value,
1476  u_int *cur_column,
1477  u_int wrap_point);
1478 #endif /* _AIC79XX_H_ */
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