2 * Core definitions and data structures shareable across OS platforms.
4 * Copyright (c) 1994-2001 Justin T. Gibbs.
5 * Copyright (c) 2000-2001 Adaptec Inc.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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.
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)
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38 * POSSIBILITY OF SUCH DAMAGES.
40 * $Id: //depot/aic7xxx/aic7xxx/aic7xxx.h#85 $
48 /* Register Definitions */
49 #include "aic7xxx_reg.h"
51 /************************* Forward Declarations *******************************/
52 struct ahc_platform_data;
53 struct scb_platform_data;
54 struct seeprom_descriptor;
56 /****************************** Useful Macros *********************************/
64 #define ALL_CHANNELS '\0'
65 #define ALL_TARGETS_MASK 0xFFFF
66 #define INITIATOR_WILDCARD (~0)
68 #define SCSIID_TARGET(ahc, scsiid) \
69 (((scsiid) & ((((ahc)->features & AHC_TWIN) != 0) ? TWIN_TID : TID)) \
71 #define SCSIID_OUR_ID(scsiid) \
73 #define SCSIID_CHANNEL(ahc, scsiid) \
74 ((((ahc)->features & AHC_TWIN) != 0) \
75 ? ((((scsiid) & TWIN_CHNLB) != 0) ? 'B' : 'A') \
77 #define SCB_IS_SCSIBUS_B(ahc, scb) \
78 (SCSIID_CHANNEL(ahc, (scb)->hscb->scsiid) == 'B')
79 #define SCB_GET_OUR_ID(scb) \
80 SCSIID_OUR_ID((scb)->hscb->scsiid)
81 #define SCB_GET_TARGET(ahc, scb) \
82 SCSIID_TARGET((ahc), (scb)->hscb->scsiid)
83 #define SCB_GET_CHANNEL(ahc, scb) \
84 SCSIID_CHANNEL(ahc, (scb)->hscb->scsiid)
85 #define SCB_GET_LUN(scb) \
86 ((scb)->hscb->lun & LID)
87 #define SCB_GET_TARGET_OFFSET(ahc, scb) \
88 (SCB_GET_TARGET(ahc, scb) + (SCB_IS_SCSIBUS_B(ahc, scb) ? 8 : 0))
89 #define SCB_GET_TARGET_MASK(ahc, scb) \
90 (0x01 << (SCB_GET_TARGET_OFFSET(ahc, scb)))
92 #define SCB_IS_SILENT(scb) \
93 ((ahc_debug & AHC_SHOW_MASKED_ERRORS) == 0 \
94 && (((scb)->flags & SCB_SILENT) != 0))
96 #define SCB_IS_SILENT(scb) \
97 (((scb)->flags & SCB_SILENT) != 0)
99 #define TCL_TARGET_OFFSET(tcl) \
100 ((((tcl) >> 4) & TID) >> 4)
101 #define TCL_LUN(tcl) \
102 (tcl & (AHC_NUM_LUNS - 1))
103 #define BUILD_TCL(scsiid, lun) \
104 ((lun) | (((scsiid) & TID) << 4))
106 #ifndef AHC_TARGET_MODE
107 #undef AHC_TMODE_ENABLE
108 #define AHC_TMODE_ENABLE 0
111 /**************************** Driver Constants ********************************/
113 * The maximum number of supported targets.
115 #define AHC_NUM_TARGETS 16
118 * The maximum number of supported luns.
119 * The identify message only supports 64 luns in SPI3.
120 * You can have 2^64 luns when information unit transfers are enabled,
121 * but it is doubtful this driver will ever support IUTs.
123 #define AHC_NUM_LUNS 64
126 * The maximum transfer per S/G segment.
128 #define AHC_MAXTRANSFER_SIZE 0x00ffffff /* limited by 24bit counter */
131 * The maximum amount of SCB storage in hardware on a controller.
132 * This value represents an upper bound. Controllers vary in the number
133 * they actually support.
135 #define AHC_SCB_MAX 255
138 * The maximum number of concurrent transactions supported per driver instance.
139 * Sequencer Control Blocks (SCBs) store per-transaction information. Although
140 * the space for SCBs on the host adapter varies by model, the driver will
141 * page the SCBs between host and controller memory as needed. We are limited
143 * 1) The 8bit nature of the RISC engine holds us to an 8bit value.
144 * 2) We reserve one value, 255, to represent the invalid element.
145 * 3) Our input queue scheme requires one SCB to always be reserved
146 * in advance of queuing any SCBs. This takes us down to 254.
147 * 4) To handle our output queue correctly on machines that only
148 * support 32bit stores, we must clear the array 4 bytes at a
149 * time. To avoid colliding with a DMA write from the sequencer,
150 * we must be sure that 4 slots are empty when we write to clear
151 * the queue. This reduces us to 253 SCBs: 1 that just completed
152 * and the known three additional empty slots in the queue that
155 #define AHC_MAX_QUEUE 253
158 * The maximum amount of SCB storage we allocate in host memory. This
159 * number should reflect the 1 additional SCB we require to handle our
162 #define AHC_SCB_MAX_ALLOC (AHC_MAX_QUEUE+1)
165 * Ring Buffer of incoming target commands.
166 * We allocate 256 to simplify the logic in the sequencer
167 * by using the natural wrap point of an 8bit counter.
169 #define AHC_TMODE_CMDS 256
171 /* Reset line assertion time in us */
172 #define AHC_BUSRESET_DELAY 25
174 /******************* Chip Characteristics/Operating Settings *****************/
177 * The chip order is from least sophisticated to most sophisticated.
181 AHC_CHIPID_MASK = 0x00FF,
182 AHC_AIC7770 = 0x0001,
183 AHC_AIC7850 = 0x0002,
184 AHC_AIC7855 = 0x0003,
185 AHC_AIC7859 = 0x0004,
186 AHC_AIC7860 = 0x0005,
187 AHC_AIC7870 = 0x0006,
188 AHC_AIC7880 = 0x0007,
189 AHC_AIC7895 = 0x0008,
190 AHC_AIC7895C = 0x0009,
191 AHC_AIC7890 = 0x000a,
192 AHC_AIC7896 = 0x000b,
193 AHC_AIC7892 = 0x000c,
194 AHC_AIC7899 = 0x000d,
195 AHC_VL = 0x0100, /* Bus type VL */
196 AHC_EISA = 0x0200, /* Bus type EISA */
197 AHC_PCI = 0x0400, /* Bus type PCI */
198 AHC_BUS_MASK = 0x0F00
202 * Features available in each chip type.
205 AHC_FENONE = 0x00000,
206 AHC_ULTRA = 0x00001, /* Supports 20MHz Transfers */
207 AHC_ULTRA2 = 0x00002, /* Supports 40MHz Transfers */
208 AHC_WIDE = 0x00004, /* Wide Channel */
209 AHC_TWIN = 0x00008, /* Twin Channel */
210 AHC_MORE_SRAM = 0x00010, /* 80 bytes instead of 64 */
211 AHC_CMD_CHAN = 0x00020, /* Has a Command DMA Channel */
212 AHC_QUEUE_REGS = 0x00040, /* Has Queue management registers */
213 AHC_SG_PRELOAD = 0x00080, /* Can perform auto-SG preload */
214 AHC_SPIOCAP = 0x00100, /* Has a Serial Port I/O Cap Register */
215 AHC_MULTI_TID = 0x00200, /* Has bitmask of TIDs for select-in */
216 AHC_HS_MAILBOX = 0x00400, /* Has HS_MAILBOX register */
217 AHC_DT = 0x00800, /* Double Transition transfers */
218 AHC_NEW_TERMCTL = 0x01000, /* Newer termination scheme */
219 AHC_MULTI_FUNC = 0x02000, /* Multi-Function Twin Channel Device */
220 AHC_LARGE_SCBS = 0x04000, /* 64byte SCBs */
221 AHC_AUTORATE = 0x08000, /* Automatic update of SCSIRATE/OFFSET*/
222 AHC_AUTOPAUSE = 0x10000, /* Automatic pause on register access */
223 AHC_TARGETMODE = 0x20000, /* Has tested target mode support */
224 AHC_MULTIROLE = 0x40000, /* Space for two roles at a time */
225 AHC_REMOVABLE = 0x80000, /* Hot-Swap supported */
226 AHC_HVD = 0x100000, /* HVD rather than SE */
227 AHC_AIC7770_FE = AHC_FENONE,
229 * The real 7850 does not support Ultra modes, but there are
230 * several cards that use the generic 7850 PCI ID even though
231 * they are using an Ultra capable chip (7859/7860). We start
232 * out with the AHC_ULTRA feature set and then check the DEVSTATUS
233 * register to determine if the capability is really present.
235 AHC_AIC7850_FE = AHC_SPIOCAP|AHC_AUTOPAUSE|AHC_TARGETMODE|AHC_ULTRA,
236 AHC_AIC7860_FE = AHC_AIC7850_FE,
237 AHC_AIC7870_FE = AHC_TARGETMODE|AHC_AUTOPAUSE,
238 AHC_AIC7880_FE = AHC_AIC7870_FE|AHC_ULTRA,
240 * Although we have space for both the initiator and
241 * target roles on ULTRA2 chips, we currently disable
242 * the initiator role to allow multi-scsi-id target mode
243 * configurations. We can only respond on the same SCSI
244 * ID as our initiator role if we allow initiator operation.
245 * At some point, we should add a configuration knob to
246 * allow both roles to be loaded.
248 AHC_AIC7890_FE = AHC_MORE_SRAM|AHC_CMD_CHAN|AHC_ULTRA2
249 |AHC_QUEUE_REGS|AHC_SG_PRELOAD|AHC_MULTI_TID
250 |AHC_HS_MAILBOX|AHC_NEW_TERMCTL|AHC_LARGE_SCBS
252 AHC_AIC7892_FE = AHC_AIC7890_FE|AHC_DT|AHC_AUTORATE|AHC_AUTOPAUSE,
253 AHC_AIC7895_FE = AHC_AIC7880_FE|AHC_MORE_SRAM|AHC_AUTOPAUSE
254 |AHC_CMD_CHAN|AHC_MULTI_FUNC|AHC_LARGE_SCBS,
255 AHC_AIC7895C_FE = AHC_AIC7895_FE|AHC_MULTI_TID,
256 AHC_AIC7896_FE = AHC_AIC7890_FE|AHC_MULTI_FUNC,
257 AHC_AIC7899_FE = AHC_AIC7892_FE|AHC_MULTI_FUNC
261 * Bugs in the silicon that we work around in software.
266 * On all chips prior to the U2 product line,
267 * the WIDEODD S/G segment feature does not
268 * work during scsi->HostBus transfers.
270 AHC_TMODE_WIDEODD_BUG = 0x01,
272 * On the aic7890/91 Rev 0 chips, the autoflush
273 * feature does not work. A manual flush of
274 * the DMA FIFO is required.
276 AHC_AUTOFLUSH_BUG = 0x02,
278 * On many chips, cacheline streaming does not work.
280 AHC_CACHETHEN_BUG = 0x04,
282 * On the aic7896/97 chips, cacheline
283 * streaming must be enabled.
285 AHC_CACHETHEN_DIS_BUG = 0x08,
287 * PCI 2.1 Retry failure on non-empty data fifo.
289 AHC_PCI_2_1_RETRY_BUG = 0x10,
291 * Controller does not handle cacheline residuals
292 * properly on S/G segments if PCI MWI instructions
295 AHC_PCI_MWI_BUG = 0x20,
297 * An SCB upload using the SCB channel's
298 * auto array entry copy feature may
299 * corrupt data. This appears to only
300 * occur on 66MHz systems.
302 AHC_SCBCHAN_UPLOAD_BUG = 0x40
306 * Configuration specific settings.
307 * The driver determines these settings by probing the
308 * chip/controller's configuration.
312 AHC_PRIMARY_CHANNEL = 0x003, /*
313 * The channel that should
316 AHC_USEDEFAULTS = 0x004, /*
317 * For cards without an seeprom
318 * or a BIOS to initialize the chip's
319 * SRAM, we use the default target
322 AHC_SEQUENCER_DEBUG = 0x008,
323 AHC_SHARED_SRAM = 0x010,
324 AHC_LARGE_SEEPROM = 0x020, /* Uses C56_66 not C46 */
325 AHC_RESET_BUS_A = 0x040,
326 AHC_RESET_BUS_B = 0x080,
327 AHC_EXTENDED_TRANS_A = 0x100,
328 AHC_EXTENDED_TRANS_B = 0x200,
329 AHC_TERM_ENB_A = 0x400,
330 AHC_TERM_ENB_B = 0x800,
331 AHC_INITIATORROLE = 0x1000, /*
332 * Allow initiator operations on
335 AHC_TARGETROLE = 0x2000, /*
336 * Allow target operations on this
339 AHC_NEWEEPROM_FMT = 0x4000,
340 AHC_TQINFIFO_BLOCKED = 0x10000, /* Blocked waiting for ATIOs */
341 AHC_INT50_SPEEDFLEX = 0x20000, /*
342 * Internal 50pin connector
343 * sits behind an aic3860
345 AHC_SCB_BTT = 0x40000, /*
346 * The busy targets table is
347 * stored in SCB space rather
350 AHC_BIOS_ENABLED = 0x80000,
351 AHC_ALL_INTERRUPTS = 0x100000,
352 AHC_PAGESCBS = 0x400000, /* Enable SCB paging */
353 AHC_EDGE_INTERRUPT = 0x800000, /* Device uses edge triggered ints */
354 AHC_39BIT_ADDRESSING = 0x1000000, /* Use 39 bit addressing scheme. */
355 AHC_LSCBS_ENABLED = 0x2000000, /* 64Byte SCBs enabled */
356 AHC_SCB_CONFIG_USED = 0x4000000, /* No SEEPROM but SCB2 had info. */
357 AHC_NO_BIOS_INIT = 0x8000000, /* No BIOS left over settings. */
358 AHC_DISABLE_PCI_PERR = 0x10000000,
359 AHC_HAS_TERM_LOGIC = 0x20000000
362 /************************* Hardware SCB Definition ***************************/
365 * The driver keeps up to MAX_SCB scb structures per card in memory. The SCB
366 * consists of a "hardware SCB" mirroring the fields available on the card
367 * and additional information the kernel stores for each transaction.
369 * To minimize space utilization, a portion of the hardware scb stores
370 * different data during different portions of a SCSI transaction.
371 * As initialized by the host driver for the initiator role, this area
372 * contains the SCSI cdb (or a pointer to the cdb) to be executed. After
373 * the cdb has been presented to the target, this area serves to store
374 * residual transfer information and the SCSI status byte.
375 * For the target role, the contents of this area do not change, but
376 * still serve a different purpose than for the initiator role. See
377 * struct target_data for details.
381 * Status information embedded in the shared poriton of
382 * an SCB after passing the cdb to the target. The kernel
383 * driver will only read this data for transactions that
384 * complete abnormally (non-zero status byte).
387 uint32_t residual_datacnt; /* Residual in the current S/G seg */
388 uint32_t residual_sg_ptr; /* The next S/G for this transfer */
389 uint8_t scsi_status; /* Standard SCSI status byte */
393 * Target mode version of the shared data SCB segment.
396 uint32_t residual_datacnt; /* Residual in the current S/G seg */
397 uint32_t residual_sg_ptr; /* The next S/G for this transfer */
398 uint8_t scsi_status; /* SCSI status to give to initiator */
399 uint8_t target_phases; /* Bitmap of phases to execute */
400 uint8_t data_phase; /* Data-In or Data-Out */
401 uint8_t initiator_tag; /* Initiator's transaction tag */
404 struct hardware_scb {
407 * If the cdb is 12 bytes or less, we embed it directly
408 * in the SCB. For longer cdbs, we embed the address
409 * of the cdb payload as seen by the chip and a DMA
410 * is used to pull it in.
414 struct status_pkt status;
415 struct target_data tdata;
418 * A word about residuals.
419 * The scb is presented to the sequencer with the dataptr and datacnt
420 * fields initialized to the contents of the first S/G element to
421 * transfer. The sgptr field is initialized to the bus address for
422 * the S/G element that follows the first in the in core S/G array
423 * or'ed with the SG_FULL_RESID flag. Sgptr may point to an invalid
424 * S/G entry for this transfer (single S/G element transfer with the
425 * first elements address and length preloaded in the dataptr/datacnt
426 * fields). If no transfer is to occur, sgptr is set to SG_LIST_NULL.
427 * The SG_FULL_RESID flag ensures that the residual will be correctly
428 * noted even if no data transfers occur. Once the data phase is entered,
429 * the residual sgptr and datacnt are loaded from the sgptr and the
430 * datacnt fields. After each S/G element's dataptr and length are
431 * loaded into the hardware, the residual sgptr is advanced. After
432 * each S/G element is expired, its datacnt field is checked to see
433 * if the LAST_SEG flag is set. If so, SG_LIST_NULL is set in the
434 * residual sg ptr and the transfer is considered complete. If the
435 * sequencer determines that there is a residual in the tranfer, it
436 * will set the SG_RESID_VALID flag in sgptr and dma the scb back into
437 * host memory. To sumarize:
440 * o A residual has occurred if SG_FULL_RESID is set in sgptr,
441 * or residual_sgptr does not have SG_LIST_NULL set.
443 * o We are transfering the last segment if residual_datacnt has
444 * the SG_LAST_SEG flag set.
447 * o A residual has occurred if a completed scb has the
448 * SG_RESID_VALID flag set.
450 * o residual_sgptr and sgptr refer to the "next" sg entry
451 * and so may point beyond the last valid sg entry for the
454 /*12*/ uint32_t dataptr;
455 /*16*/ uint32_t datacnt; /*
456 * Byte 3 (numbered from 0) of
457 * the datacnt is really the
458 * 4th byte in that data address.
460 /*20*/ uint32_t sgptr;
461 #define SG_PTR_MASK 0xFFFFFFF8
462 /*24*/ uint8_t control; /* See SCB_CONTROL in aic7xxx.reg for details */
463 /*25*/ uint8_t scsiid; /* what to load in the SCSIID register */
465 /*27*/ uint8_t tag; /*
466 * Index into our kernel SCB array.
467 * Also used as the tag for tagged I/O
469 /*28*/ uint8_t cdb_len;
470 /*29*/ uint8_t scsirate; /* Value for SCSIRATE register */
471 /*30*/ uint8_t scsioffset; /* Value for SCSIOFFSET register */
472 /*31*/ uint8_t next; /*
473 * Used for threading SCBs in the
474 * "Waiting for Selection" and
475 * "Disconnected SCB" lists down
478 /*32*/ uint8_t cdb32[32]; /*
479 * CDB storage for cdbs of size
480 * 13->32. We store them here
481 * because hardware scbs are
482 * allocated from DMA safe
483 * memory so we are guaranteed
484 * the controller can access
489 /************************ Kernel SCB Definitions ******************************/
491 * Some fields of the SCB are OS dependent. Here we collect the
492 * definitions for elements that all OS platforms need to include
493 * in there SCB definition.
497 * Definition of a scatter/gather element as transfered to the controller.
498 * The aic7xxx chips only support a 24bit length. We use the top byte of
499 * the length to store additional address bits and a flag to indicate
500 * that a given segment terminates the transfer. This gives us an
501 * addressable range of 512GB on machines with 64bit PCI or with chips
502 * that can support dual address cycles on 32bit PCI busses.
507 #define AHC_DMA_LAST_SEG 0x80000000
508 #define AHC_SG_HIGH_ADDR_MASK 0x7F000000
509 #define AHC_SG_LEN_MASK 0x00FFFFFF
513 bus_dmamap_t sg_dmamap;
514 dma_addr_t sg_physaddr;
515 struct ahc_dma_seg* sg_vaddr;
516 SLIST_ENTRY(sg_map_node) links;
520 * The current state of this SCB.
524 SCB_OTHERTCL_TIMEOUT = 0x0002,/*
525 * Another device was active
526 * during the first timeout for
527 * this SCB so we gave ourselves
528 * an additional timeout period
529 * in case it was hogging the
532 SCB_DEVICE_RESET = 0x0004,
534 SCB_CDB32_PTR = 0x0010,
535 SCB_RECOVERY_SCB = 0x0020,
536 SCB_AUTO_NEGOTIATE = 0x0040,/* Negotiate to achieve goal. */
537 SCB_NEGOTIATE = 0x0080,/* Negotiation forced for command. */
539 SCB_UNTAGGEDQ = 0x0200,
541 SCB_TARGET_IMMEDIATE = 0x0800,
542 SCB_TRANSMISSION_ERROR = 0x1000,/*
543 * We detected a parity or CRC
544 * error that has effected the
545 * payload of the command. This
546 * flag is checked when normal
547 * status is returned to catch
548 * the case of a target not
549 * responding to our attempt
550 * to report the error.
552 SCB_TARGET_SCB = 0x2000,
553 SCB_SILENT = 0x4000 /*
554 * Be quiet about transmission type
555 * errors. They are expected and we
556 * don't want to upset the user. This
557 * flag is typically used during DV.
562 struct hardware_scb *hscb;
564 SLIST_ENTRY(scb) sle;
565 TAILQ_ENTRY(scb) tqe;
567 LIST_ENTRY(scb) pending_links;
569 struct ahc_softc *ahc_softc;
574 struct scb_platform_data *platform_data;
575 struct sg_map_node *sg_map;
576 struct ahc_dma_seg *sg_list;
577 dma_addr_t sg_list_phys;
578 u_int sg_count;/* How full ahc_dma_seg is */
582 SLIST_HEAD(, scb) free_scbs; /*
583 * Pool of SCBs ready to be assigned
584 * commands to execute.
586 struct scb *scbindex[256]; /*
587 * Mapping from tag to SCB.
588 * As tag identifiers are an
589 * 8bit value, we provide space
590 * for all possible tag values.
591 * Any lookups to entries at or
592 * above AHC_SCB_MAX_ALLOC will
595 struct hardware_scb *hscbs; /* Array of hardware SCBs */
596 struct scb *scbarray; /* Array of kernel SCBs */
597 struct scsi_sense_data *sense; /* Per SCB sense data */
600 * "Bus" addresses of our data structures.
602 bus_dma_tag_t hscb_dmat; /* dmat for our hardware SCB array */
603 bus_dmamap_t hscb_dmamap;
604 dma_addr_t hscb_busaddr;
605 bus_dma_tag_t sense_dmat;
606 bus_dmamap_t sense_dmamap;
607 dma_addr_t sense_busaddr;
608 bus_dma_tag_t sg_dmat; /* dmat for our sg segments */
609 SLIST_HEAD(, sg_map_node) sg_maps;
611 uint8_t maxhscbs; /* Number of SCBs on the card */
612 uint8_t init_level; /*
613 * How far we've initialized
618 /************************ Target Mode Definitions *****************************/
621 * Connection desciptor for select-in requests in target mode.
624 uint8_t scsiid; /* Our ID and the initiator's ID */
625 uint8_t identify; /* Identify message */
626 uint8_t bytes[22]; /*
627 * Bytes contains any additional message
628 * bytes terminated by 0xFF. The remainder
629 * is the cdb to execute.
631 uint8_t cmd_valid; /*
632 * When a command is complete, the firmware
633 * will set cmd_valid to all bits set.
634 * After the host has seen the command,
635 * the bits are cleared. This allows us
636 * to just peek at host memory to determine
637 * if more work is complete. cmd_valid is on
638 * an 8 byte boundary to simplify setting
639 * it on aic7880 hardware which only has
640 * limited direct access to the DMA FIFO.
646 * Number of events we can buffer up if we run out
647 * of immediate notify ccbs.
649 #define AHC_TMODE_EVENT_BUFFER_SIZE 8
650 struct ahc_tmode_event {
651 uint8_t initiator_id;
652 uint8_t event_type; /* MSG type or EVENT_TYPE_BUS_RESET */
653 #define EVENT_TYPE_BUS_RESET 0xFF
658 * Per enabled lun target mode state.
659 * As this state is directly influenced by the host OS'es target mode
660 * environment, we let the OS module define it. Forward declare the
661 * structure here so we can store arrays of them, etc. in OS neutral
664 #ifdef AHC_TARGET_MODE
665 struct ahc_tmode_lstate {
666 struct cam_path *path;
667 struct ccb_hdr_slist accept_tios;
668 struct ccb_hdr_slist immed_notifies;
669 struct ahc_tmode_event event_buffer[AHC_TMODE_EVENT_BUFFER_SIZE];
674 struct ahc_tmode_lstate;
677 /******************** Transfer Negotiation Datastructures *********************/
678 #define AHC_TRANS_CUR 0x01 /* Modify current neogtiation status */
679 #define AHC_TRANS_ACTIVE 0x03 /* Assume this target is on the bus */
680 #define AHC_TRANS_GOAL 0x04 /* Modify negotiation goal */
681 #define AHC_TRANS_USER 0x08 /* Modify user negotiation settings */
683 #define AHC_WIDTH_UNKNOWN 0xFF
684 #define AHC_PERIOD_UNKNOWN 0xFF
685 #define AHC_OFFSET_UNKNOWN 0xFF
686 #define AHC_PPR_OPTS_UNKNOWN 0xFF
689 * Transfer Negotiation Information.
691 struct ahc_transinfo {
692 uint8_t protocol_version; /* SCSI Revision level */
693 uint8_t transport_version; /* SPI Revision level */
694 uint8_t width; /* Bus width */
695 uint8_t period; /* Sync rate factor */
696 uint8_t offset; /* Sync offset */
697 uint8_t ppr_options; /* Parallel Protocol Request options */
701 * Per-initiator current, goal and user transfer negotiation information. */
702 struct ahc_initiator_tinfo {
703 uint8_t scsirate; /* Computed value for SCSIRATE reg */
704 struct ahc_transinfo curr;
705 struct ahc_transinfo goal;
706 struct ahc_transinfo user;
710 * Per enabled target ID state.
711 * Pointers to lun target state as well as sync/wide negotiation information
712 * for each initiator<->target mapping. For the initiator role we pretend
713 * that we are the target and the targets are the initiators since the
714 * negotiation is the same regardless of role.
716 struct ahc_tmode_tstate {
717 struct ahc_tmode_lstate* enabled_luns[AHC_NUM_LUNS];
718 struct ahc_initiator_tinfo transinfo[AHC_NUM_TARGETS];
721 * Per initiator state bitmasks.
723 uint16_t auto_negotiate;/* Auto Negotiation Required */
724 uint16_t ultraenb; /* Using ultra sync rate */
725 uint16_t discenable; /* Disconnection allowed */
726 uint16_t tagenable; /* Tagged Queuing allowed */
730 * Data structure for our table of allowed synchronous transfer rates.
732 struct ahc_syncrate {
733 u_int sxfr_u2; /* Value of the SXFR parameter for Ultra2+ Chips */
734 u_int sxfr; /* Value of the SXFR parameter for <= Ultra Chips */
735 #define ULTRA_SXFR 0x100 /* Rate Requires Ultra Mode set */
736 #define ST_SXFR 0x010 /* Rate Single Transition Only */
737 #define DT_SXFR 0x040 /* Rate Double Transition Only */
738 uint8_t period; /* Period to send to SCSI target */
742 /* Safe and valid period for async negotiations. */
743 #define AHC_ASYNC_XFER_PERIOD 0x45
744 #define AHC_ULTRA2_XFER_PERIOD 0x0a
747 * Indexes into our table of syncronous transfer rates.
749 #define AHC_SYNCRATE_DT 0
750 #define AHC_SYNCRATE_ULTRA2 1
751 #define AHC_SYNCRATE_ULTRA 3
752 #define AHC_SYNCRATE_FAST 6
753 #define AHC_SYNCRATE_MAX AHC_SYNCRATE_DT
754 #define AHC_SYNCRATE_MIN 13
756 /***************************** Lookup Tables **********************************/
758 * Phase -> name and message out response
759 * to parity errors in each phase table.
761 struct ahc_phase_table_entry {
763 uint8_t mesg_out; /* Message response to parity errors */
767 /************************** Serial EEPROM Format ******************************/
769 struct seeprom_config {
771 * Per SCSI ID Configuration Flags
773 uint16_t device_flags[16]; /* words 0-15 */
774 #define CFXFER 0x0007 /* synchronous transfer rate */
775 #define CFSYNCH 0x0008 /* enable synchronous transfer */
776 #define CFDISC 0x0010 /* enable disconnection */
777 #define CFWIDEB 0x0020 /* wide bus device */
778 #define CFSYNCHISULTRA 0x0040 /* CFSYNCH is an ultra offset (2940AU)*/
779 #define CFSYNCSINGLE 0x0080 /* Single-Transition signalling */
780 #define CFSTART 0x0100 /* send start unit SCSI command */
781 #define CFINCBIOS 0x0200 /* include in BIOS scan */
782 #define CFRNFOUND 0x0400 /* report even if not found */
783 #define CFMULTILUNDEV 0x0800 /* Probe multiple luns in BIOS scan */
784 #define CFWBCACHEENB 0x4000 /* Enable W-Behind Cache on disks */
785 #define CFWBCACHENOP 0xc000 /* Don't touch W-Behind Cache */
790 uint16_t bios_control; /* word 16 */
791 #define CFSUPREM 0x0001 /* support all removeable drives */
792 #define CFSUPREMB 0x0002 /* support removeable boot drives */
793 #define CFBIOSEN 0x0004 /* BIOS enabled */
794 #define CFBIOS_BUSSCAN 0x0008 /* Have the BIOS Scan the Bus */
795 #define CFSM2DRV 0x0010 /* support more than two drives */
796 #define CFSTPWLEVEL 0x0010 /* Termination level control */
797 #define CF284XEXTEND 0x0020 /* extended translation (284x cards) */
798 #define CFCTRL_A 0x0020 /* BIOS displays Ctrl-A message */
799 #define CFTERM_MENU 0x0040 /* BIOS displays termination menu */
800 #define CFEXTEND 0x0080 /* extended translation enabled */
801 #define CFSCAMEN 0x0100 /* SCAM enable */
802 #define CFMSG_LEVEL 0x0600 /* BIOS Message Level */
803 #define CFMSG_VERBOSE 0x0000
804 #define CFMSG_SILENT 0x0200
805 #define CFMSG_DIAG 0x0400
806 #define CFBOOTCD 0x0800 /* Support Bootable CD-ROM */
810 * Host Adapter Control Bits
812 uint16_t adapter_control; /* word 17 */
813 #define CFAUTOTERM 0x0001 /* Perform Auto termination */
814 #define CFULTRAEN 0x0002 /* Ultra SCSI speed enable */
815 #define CF284XSELTO 0x0003 /* Selection timeout (284x cards) */
816 #define CF284XFIFO 0x000C /* FIFO Threshold (284x cards) */
817 #define CFSTERM 0x0004 /* SCSI low byte termination */
818 #define CFWSTERM 0x0008 /* SCSI high byte termination */
819 #define CFSPARITY 0x0010 /* SCSI parity */
820 #define CF284XSTERM 0x0020 /* SCSI low byte term (284x cards) */
821 #define CFMULTILUN 0x0020
822 #define CFRESETB 0x0040 /* reset SCSI bus at boot */
823 #define CFCLUSTERENB 0x0080 /* Cluster Enable */
824 #define CFBOOTCHAN 0x0300 /* probe this channel first */
825 #define CFBOOTCHANSHIFT 8
826 #define CFSEAUTOTERM 0x0400 /* Ultra2 Perform secondary Auto Term*/
827 #define CFSELOWTERM 0x0800 /* Ultra2 secondary low term */
828 #define CFSEHIGHTERM 0x1000 /* Ultra2 secondary high term */
829 #define CFENABLEDV 0x4000 /* Perform Domain Validation*/
832 * Bus Release Time, Host Adapter ID
834 uint16_t brtime_id; /* word 18 */
835 #define CFSCSIID 0x000f /* host adapter SCSI ID */
837 #define CFBRTIME 0xff00 /* bus release time */
842 uint16_t max_targets; /* word 19 */
843 #define CFMAXTARG 0x00ff /* maximum targets */
844 #define CFBOOTLUN 0x0f00 /* Lun to boot from */
845 #define CFBOOTID 0xf000 /* Target to boot from */
846 uint16_t res_1[10]; /* words 20-29 */
847 uint16_t signature; /* Signature == 0x250 */
848 #define CFSIGNATURE 0x250
849 #define CFSIGNATURE2 0x300
850 uint16_t checksum; /* word 31 */
853 /**************************** Message Buffer *********************************/
855 MSG_TYPE_NONE = 0x00,
856 MSG_TYPE_INITIATOR_MSGOUT = 0x01,
857 MSG_TYPE_INITIATOR_MSGIN = 0x02,
858 MSG_TYPE_TARGET_MSGOUT = 0x03,
859 MSG_TYPE_TARGET_MSGIN = 0x04
868 /*********************** Software Configuration Structure *********************/
869 TAILQ_HEAD(scb_tailq, scb);
871 struct ahc_aic7770_softc {
873 * Saved register state used for chip_init().
879 struct ahc_pci_softc {
881 * Saved register state used for chip_init().
886 uint8_t csize_lattime;
895 union ahc_bus_softc {
896 struct ahc_aic7770_softc aic7770_softc;
897 struct ahc_pci_softc pci_softc;
900 typedef void (*ahc_bus_intr_t)(struct ahc_softc *);
901 typedef int (*ahc_bus_chip_init_t)(struct ahc_softc *);
902 typedef int (*ahc_bus_suspend_t)(struct ahc_softc *);
903 typedef int (*ahc_bus_resume_t)(struct ahc_softc *);
904 typedef void ahc_callback_t (void *);
908 bus_space_handle_t bsh;
910 bus_dma_tag_t buffer_dmat; /* dmat for buffer I/O */
912 struct scb_data *scb_data;
914 struct scb *next_queued_scb;
917 * SCBs that have been sent to the controller
919 LIST_HEAD(, scb) pending_scbs;
922 * Counting lock for deferring the release of additional
923 * untagged transactions from the untagged_queues. When
924 * the lock is decremented to 0, all queues in the
925 * untagged_queues array are run.
927 u_int untagged_queue_lock;
930 * Per-target queue of untagged-transactions. The
931 * transaction at the head of the queue is the
932 * currently pending untagged transaction for the
933 * target. The driver only allows a single untagged
934 * transaction per target.
936 struct scb_tailq untagged_queues[AHC_NUM_TARGETS];
939 * Bus attachment specific data.
941 union ahc_bus_softc bus_softc;
944 * Platform specific data.
946 struct ahc_platform_data *platform_data;
949 * Platform specific device information.
951 ahc_dev_softc_t dev_softc;
954 * Bus specific device information.
956 ahc_bus_intr_t bus_intr;
959 * Bus specific initialization required
960 * after a chip reset.
962 ahc_bus_chip_init_t bus_chip_init;
965 * Bus specific suspend routine.
967 ahc_bus_suspend_t bus_suspend;
970 * Bus specific resume routine.
972 ahc_bus_resume_t bus_resume;
975 * Target mode related state kept on a per enabled lun basis.
976 * Targets that are not enabled will have null entries.
977 * As an initiator, we keep one target entry for our initiator
978 * ID to store our sync/wide transfer settings.
980 struct ahc_tmode_tstate *enabled_targets[AHC_NUM_TARGETS];
983 * The black hole device responsible for handling requests for
984 * disabled luns on enabled targets.
986 struct ahc_tmode_lstate *black_hole;
989 * Device instance currently on the bus awaiting a continue TIO
990 * for a command that was not given the disconnect priveledge.
992 struct ahc_tmode_lstate *pending_device;
995 * Card characteristics
998 ahc_feature features;
1001 struct seeprom_config *seep_config;
1003 /* Values to store in the SEQCTL register for pause and unpause */
1007 /* Command Queues */
1008 uint8_t qoutfifonext;
1009 uint8_t qinfifonext;
1013 /* Critical Section Data */
1014 struct cs *critical_sections;
1015 u_int num_critical_sections;
1017 /* Channel Names ('A', 'B', etc.) */
1021 /* Initiator Bus ID */
1026 * PCI error detection.
1028 int unsolicited_ints;
1031 * Target incoming command FIFO.
1033 struct target_cmd *targetcmds;
1034 uint8_t tqinfifonext;
1037 * Cached copy of the sequencer control register.
1042 * Incoming and outgoing message handling.
1044 uint8_t send_msg_perror;
1045 ahc_msg_type msg_type;
1046 uint8_t msgout_buf[12];/* Message we are sending */
1047 uint8_t msgin_buf[12];/* Message we are receiving */
1048 u_int msgout_len; /* Length of message to send */
1049 u_int msgout_index; /* Current index in msgout */
1050 u_int msgin_index; /* Current index in msgin */
1053 * Mapping information for data structures shared
1054 * between the sequencer and kernel.
1056 bus_dma_tag_t parent_dmat;
1057 bus_dma_tag_t shared_data_dmat;
1058 bus_dmamap_t shared_data_dmamap;
1059 dma_addr_t shared_data_busaddr;
1062 * Bus address of the one byte buffer used to
1063 * work-around a DMA bug for chips <= aic7880
1066 dma_addr_t dma_bug_buf;
1068 /* Number of enabled target mode device on this card */
1071 /* Initialization level of this data structure */
1074 /* PCI cacheline size. */
1075 u_int pci_cachesize;
1078 * Count of parity errors we have seen as a target.
1079 * We auto-disable parity error checking after seeing
1080 * AHC_PCI_TARGET_PERR_THRESH number of errors.
1082 u_int pci_target_perr_count;
1083 #define AHC_PCI_TARGET_PERR_THRESH 10
1085 /* Maximum number of sequencer instructions supported. */
1086 u_int instruction_ram_size;
1088 /* Per-Unit descriptive information */
1089 const char *description;
1093 /* Selection Timer settings */
1097 uint16_t user_discenable;/* Disconnection allowed */
1098 uint16_t user_tagenable;/* Tagged Queuing allowed */
1101 /************************ Active Device Information ***************************/
1108 struct ahc_devinfo {
1111 uint16_t target_mask;
1116 * Only guaranteed to be correct if not
1117 * in the busfree state.
1121 /****************************** PCI Structures ********************************/
1122 typedef int (ahc_device_setup_t)(struct ahc_softc *);
1124 struct ahc_pci_identity {
1128 ahc_device_setup_t *setup;
1131 /***************************** VL/EISA Declarations ***************************/
1132 struct aic7770_identity {
1136 ahc_device_setup_t *setup;
1138 extern struct aic7770_identity aic7770_ident_table[];
1139 extern const int ahc_num_aic7770_devs;
1141 #define AHC_EISA_SLOT_OFFSET 0xc00
1142 #define AHC_EISA_IOSIZE 0x100
1144 /*************************** Function Declarations ****************************/
1145 /******************************************************************************/
1146 u_int ahc_index_busy_tcl(struct ahc_softc *ahc, u_int tcl);
1147 void ahc_unbusy_tcl(struct ahc_softc *ahc, u_int tcl);
1148 void ahc_busy_tcl(struct ahc_softc *ahc,
1149 u_int tcl, u_int busyid);
1151 /***************************** PCI Front End *********************************/
1152 struct ahc_pci_identity *ahc_find_pci_device(ahc_dev_softc_t);
1153 int ahc_pci_config(struct ahc_softc *,
1154 struct ahc_pci_identity *);
1155 int ahc_pci_test_register_access(struct ahc_softc *);
1157 /*************************** EISA/VL Front End ********************************/
1158 struct aic7770_identity *aic7770_find_device(uint32_t);
1159 int aic7770_config(struct ahc_softc *ahc,
1160 struct aic7770_identity *,
1163 /************************** SCB and SCB queue management **********************/
1164 int ahc_probe_scbs(struct ahc_softc *);
1165 void ahc_run_untagged_queues(struct ahc_softc *ahc);
1166 void ahc_run_untagged_queue(struct ahc_softc *ahc,
1167 struct scb_tailq *queue);
1168 void ahc_qinfifo_requeue_tail(struct ahc_softc *ahc,
1170 int ahc_match_scb(struct ahc_softc *ahc, struct scb *scb,
1171 int target, char channel, int lun,
1172 u_int tag, role_t role);
1174 /****************************** Initialization ********************************/
1175 struct ahc_softc *ahc_alloc(void *platform_arg, char *name);
1176 int ahc_softc_init(struct ahc_softc *);
1177 void ahc_controller_info(struct ahc_softc *ahc, char *buf);
1178 int ahc_chip_init(struct ahc_softc *ahc);
1179 int ahc_init(struct ahc_softc *ahc);
1180 void ahc_intr_enable(struct ahc_softc *ahc, int enable);
1181 void ahc_pause_and_flushwork(struct ahc_softc *ahc);
1182 int ahc_suspend(struct ahc_softc *ahc);
1183 int ahc_resume(struct ahc_softc *ahc);
1184 void ahc_set_unit(struct ahc_softc *, int);
1185 void ahc_set_name(struct ahc_softc *, char *);
1186 void ahc_alloc_scbs(struct ahc_softc *ahc);
1187 void ahc_free(struct ahc_softc *ahc);
1188 int ahc_reset(struct ahc_softc *ahc, int reinit);
1189 void ahc_shutdown(void *arg);
1191 /*************************** Interrupt Services *******************************/
1192 void ahc_clear_intstat(struct ahc_softc *ahc);
1193 void ahc_run_qoutfifo(struct ahc_softc *ahc);
1194 #ifdef AHC_TARGET_MODE
1195 void ahc_run_tqinfifo(struct ahc_softc *ahc, int paused);
1197 void ahc_handle_brkadrint(struct ahc_softc *ahc);
1198 void ahc_handle_seqint(struct ahc_softc *ahc, u_int intstat);
1199 void ahc_handle_scsiint(struct ahc_softc *ahc,
1201 void ahc_clear_critical_section(struct ahc_softc *ahc);
1203 /***************************** Error Recovery *********************************/
1208 } ahc_search_action;
1209 int ahc_search_qinfifo(struct ahc_softc *ahc, int target,
1210 char channel, int lun, u_int tag,
1211 role_t role, uint32_t status,
1212 ahc_search_action action);
1213 int ahc_search_untagged_queues(struct ahc_softc *ahc,
1215 int target, char channel,
1216 int lun, uint32_t status,
1217 ahc_search_action action);
1218 int ahc_search_disc_list(struct ahc_softc *ahc, int target,
1219 char channel, int lun, u_int tag,
1220 int stop_on_first, int remove,
1222 void ahc_freeze_devq(struct ahc_softc *ahc, struct scb *scb);
1223 int ahc_reset_channel(struct ahc_softc *ahc, char channel,
1224 int initiate_reset);
1225 int ahc_abort_scbs(struct ahc_softc *ahc, int target,
1226 char channel, int lun, u_int tag,
1227 role_t role, uint32_t status);
1228 void ahc_restart(struct ahc_softc *ahc);
1229 void ahc_calc_residual(struct ahc_softc *ahc,
1231 /*************************** Utility Functions ********************************/
1232 struct ahc_phase_table_entry*
1233 ahc_lookup_phase_entry(int phase);
1234 void ahc_compile_devinfo(struct ahc_devinfo *devinfo,
1235 u_int our_id, u_int target,
1236 u_int lun, char channel,
1238 /************************** Transfer Negotiation ******************************/
1239 struct ahc_syncrate* ahc_find_syncrate(struct ahc_softc *ahc, u_int *period,
1240 u_int *ppr_options, u_int maxsync);
1241 u_int ahc_find_period(struct ahc_softc *ahc,
1242 u_int scsirate, u_int maxsync);
1243 void ahc_validate_offset(struct ahc_softc *ahc,
1244 struct ahc_initiator_tinfo *tinfo,
1245 struct ahc_syncrate *syncrate,
1246 u_int *offset, int wide,
1248 void ahc_validate_width(struct ahc_softc *ahc,
1249 struct ahc_initiator_tinfo *tinfo,
1253 * Negotiation types. These are used to qualify if we should renegotiate
1254 * even if our goal and current transport parameters are identical.
1257 AHC_NEG_TO_GOAL, /* Renegotiate only if goal and curr differ. */
1258 AHC_NEG_IF_NON_ASYNC, /* Renegotiate so long as goal is non-async. */
1259 AHC_NEG_ALWAYS /* Renegotiat even if goal is async. */
1261 int ahc_update_neg_request(struct ahc_softc*,
1262 struct ahc_devinfo*,
1263 struct ahc_tmode_tstate*,
1264 struct ahc_initiator_tinfo*,
1266 void ahc_set_width(struct ahc_softc *ahc,
1267 struct ahc_devinfo *devinfo,
1268 u_int width, u_int type, int paused);
1269 void ahc_set_syncrate(struct ahc_softc *ahc,
1270 struct ahc_devinfo *devinfo,
1271 struct ahc_syncrate *syncrate,
1272 u_int period, u_int offset,
1274 u_int type, int paused);
1281 void ahc_set_tags(struct ahc_softc *ahc,
1282 struct scsi_cmnd *cmd,
1283 struct ahc_devinfo *devinfo,
1286 /**************************** Target Mode *************************************/
1287 #ifdef AHC_TARGET_MODE
1288 void ahc_send_lstate_events(struct ahc_softc *,
1289 struct ahc_tmode_lstate *);
1290 void ahc_handle_en_lun(struct ahc_softc *ahc,
1291 struct cam_sim *sim, union ccb *ccb);
1292 cam_status ahc_find_tmode_devs(struct ahc_softc *ahc,
1293 struct cam_sim *sim, union ccb *ccb,
1294 struct ahc_tmode_tstate **tstate,
1295 struct ahc_tmode_lstate **lstate,
1296 int notfound_failure);
1297 #ifndef AHC_TMODE_ENABLE
1298 #define AHC_TMODE_ENABLE 0
1301 /******************************* Debug ***************************************/
1303 extern uint32_t ahc_debug;
1304 #define AHC_SHOW_MISC 0x0001
1305 #define AHC_SHOW_SENSE 0x0002
1306 #define AHC_DUMP_SEEPROM 0x0004
1307 #define AHC_SHOW_TERMCTL 0x0008
1308 #define AHC_SHOW_MEMORY 0x0010
1309 #define AHC_SHOW_MESSAGES 0x0020
1310 #define AHC_SHOW_DV 0x0040
1311 #define AHC_SHOW_SELTO 0x0080
1312 #define AHC_SHOW_QFULL 0x0200
1313 #define AHC_SHOW_QUEUE 0x0400
1314 #define AHC_SHOW_TQIN 0x0800
1315 #define AHC_SHOW_MASKED_ERRORS 0x1000
1316 #define AHC_DEBUG_SEQUENCER 0x2000
1318 void ahc_print_scb(struct scb *scb);
1319 void ahc_print_devinfo(struct ahc_softc *ahc,
1320 struct ahc_devinfo *dev);
1321 void ahc_dump_card_state(struct ahc_softc *ahc);
1322 int ahc_print_register(ahc_reg_parse_entry_t *table,
1329 /******************************* SEEPROM *************************************/
1330 int ahc_acquire_seeprom(struct ahc_softc *ahc,
1331 struct seeprom_descriptor *sd);
1332 void ahc_release_seeprom(struct seeprom_descriptor *sd);
1333 #endif /* _AIC7XXX_H_ */