1 /*	$NetBSD: twareg.h,v 1.11 2010/11/22 23:02:16 dholland Exp $ */
2 /*	$wasabi: twareg.h,v 1.14 2006/07/28 18:29:51 wrstuden Exp $ */
3 
4 /*-
5  * Copyright (c) 2003-04 3ware, 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  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  *	$FreeBSD: src/sys/dev/twa/twa_reg.h,v 1.2 2004/08/18 16:14:44 vkashyap Exp $
30  */
31 
32 /*
33  * 3ware driver for 9000 series storage controllers.
34  *
35  * Author: Vinod Kashyap
36  */
37 
38 #ifndef _PCI_TWAREG_H_
39 #define	_PCI_TWAREG_H_
40 
41 #if defined(_KERNEL)
42 #include <sys/bus.h>
43 
44 /*
45  * The following macro has no business being in twa_reg.h.  It should probably
46  * be defined in twa_includes.h, before the #include twa_reg.h....  But that
47  * causes the API to run into build errors.  Will leave it here for now...
48  */
49 #define TWA_64BIT_ADDRESSES	((sizeof(bus_addr_t) == 8) ? 1 : 0)
50 
51 /*
52  * Define the following here since it relies on TWA_64BIT_ADDRESSES which
53  * depends on sizeof(bus_addr_t), which is not exported to userland.
54  * The userland API shouldn't care about the kernel's bus_addr_t.
55  * For the userland API, use the array size that we would use for 32-bit
56  * addresses since that's what we use in the sg structure definition.
57  * The userland API does not actually appear to use the array, but it
58  * does include the array in various command structures.
59  */
60 #define TWA_MAX_SG_ELEMENTS		(TWA_64BIT_ADDRESSES ? 70 : 105)
61 #else
62 #define TWA_MAX_SG_ELEMENTS		105
63 #endif
64 
65 #define TWAQ_FREE	0
66 #define TWAQ_BUSY	1
67 #define TWAQ_PENDING	2
68 #define TWAQ_COMPLETE	3
69 #define TWAQ_IO_PENDING 4
70 #define TWAQ_COUNT	5	/* total number of queues */
71 
72 #define TWA_DRIVER_VERSION_STRING		"1.00.00.000"
73 
74 #define TWA_REQUEST_TIMEOUT_PERIOD		60 /* seconds */
75 
76 #define TWA_MESSAGE_SOURCE_CONTROLLER_ERROR	3
77 
78 /* Register offsets from base address. */
79 #define	TWA_CONTROL_REGISTER_OFFSET		0x0
80 #define	TWA_STATUS_REGISTER_OFFSET		0x4
81 #define	TWA_COMMAND_QUEUE_OFFSET		0x8
82 #define	TWA_RESPONSE_QUEUE_OFFSET		0xC
83 #define	TWA_COMMAND_QUEUE_OFFSET_LOW		0x20
84 #define	TWA_COMMAND_QUEUE_OFFSET_HIGH		0x24
85 #define	TWA_RESPONSE_QUEUE_LARGE_OFFSET		0x30
86 
87 #if defined(_KERNEL)
88 #define TWA_WRITE_REGISTER(sc, offset, val)	\
89 	bus_space_write_4(sc->twa_bus_iot, sc->twa_bus_ioh, offset, (uint32_t)val)
90 
91 #define TWA_WRITE_COMMAND_QUEUE(sc, val)				\
92 	do {								\
93 		if (TWA_64BIT_ADDRESSES) {				\
94 			/* First write the low 4 bytes, then the high 4. */  \
95 			TWA_WRITE_REGISTER(sc, TWA_COMMAND_QUEUE_OFFSET_LOW, \
96 						(uint32_t)(val));	\
97 			TWA_WRITE_REGISTER(sc, TWA_COMMAND_QUEUE_OFFSET_HIGH,\
98 					(uint32_t)(((uint64_t)val)>>32));  \
99 		} else							\
100 			TWA_WRITE_REGISTER(sc, TWA_COMMAND_QUEUE_OFFSET,\
101 						(uint32_t)(val)); \
102 	} while (0)
103 #endif
104 
105 #define TWA_WRITE_COMMAND_QUEUE_HIGH(sc, val)				\
106 	do {								\
107 		TWA_WRITE_REGISTER(sc, TWA_COMMAND_QUEUE_OFFSET_HIGH,	\
108 				(uint32_t)(((uint64_t)val)>>32));	\
109 	} while (0)
110 
111 #define TWA_WRITE_COMMAND_QUEUE_LOW(sc, val)				\
112 	do {								\
113 		TWA_WRITE_REGISTER(sc, TWA_COMMAND_QUEUE_OFFSET_LOW,	\
114 				(uint32_t)(val));			\
115 	} while (0)
116 
117 /* Control register bit definitions. */
118 #define TWA_CONTROL_ISSUE_HOST_INTERRUPT	0x00000020
119 #define TWA_CONTROL_DISABLE_INTERRUPTS		0x00000040
120 #define TWA_CONTROL_ENABLE_INTERRUPTS		0x00000080
121 #define TWA_CONTROL_ISSUE_SOFT_RESET		0x00000100
122 #define TWA_CONTROL_CLEAR_ERROR_STATUS		0x00000200
123 #define TWA_CONTROL_UNMASK_RESPONSE_INTERRUPT	0x00004000
124 #define TWA_CONTROL_UNMASK_COMMAND_INTERRUPT	0x00008000
125 #define TWA_CONTROL_MASK_RESPONSE_INTERRUPT	0x00010000
126 #define TWA_CONTROL_MASK_COMMAND_INTERRUPT	0x00020000
127 #define TWA_CONTROL_CLEAR_ATTENTION_INTERRUPT	0x00040000
128 #define TWA_CONTROL_CLEAR_HOST_INTERRUPT	0x00080000
129 #define TWA_CONTROL_CLEAR_PCI_ABORT		0x00100000
130 #define TWA_CONTROL_CLEAR_QUEUE_ERROR		0x00400000
131 #define TWA_CONTROL_CLEAR_PARITY_ERROR		0x00800000
132 
133 /* Status register bit definitions. */
134 #define TWA_STATUS_ROM_BIOS_IN_SBUF		0x00000002
135 #define TWA_STATUS_COMMAND_QUEUE_EMPTY		0x00001000
136 #define TWA_STATUS_MICROCONTROLLER_READY	0x00002000
137 #define TWA_STATUS_RESPONSE_QUEUE_EMPTY		0x00004000
138 #define TWA_STATUS_COMMAND_QUEUE_FULL		0x00008000
139 #define TWA_STATUS_RESPONSE_INTERRUPT		0x00010000
140 #define TWA_STATUS_COMMAND_INTERRUPT		0x00020000
141 #define TWA_STATUS_ATTENTION_INTERRUPT		0x00040000
142 #define TWA_STATUS_HOST_INTERRUPT		0x00080000
143 #define TWA_STATUS_PCI_ABORT_INTERRUPT		0x00100000
144 #define TWA_STATUS_MICROCONTROLLER_ERROR	0x00200000
145 #define TWA_STATUS_QUEUE_ERROR_INTERRUPT	0x00400000
146 #define TWA_STATUS_PCI_PARITY_ERROR_INTERRUPT	0x00800000
147 #define TWA_STATUS_MINOR_VERSION_MASK		0x0F000000
148 #define TWA_STATUS_MAJOR_VERSION_MASK		0xF0000000
149 
150 #define TWA_STATUS_EXPECTED_BITS		0x00002000
151 #define TWA_STATUS_UNEXPECTED_BITS		0x00F00000
152 
153 /* For use with the %b printf format. */
154 #define TWA_STATUS_BITS_DESCRIPTION \
155 	"\20\15CMD_Q_EMPTY\16MC_RDY\17RESP_Q_EMPTY\20CMD_Q_FULL\21RESP_INTR\22CMD_INTR\23ATTN_INTR\24HOST_INTR\25PCI_ABRT\26MC_ERR\27Q_ERR\30PCI_PERR\n"
156 
157 /* Detect inconsistencies in the status register. */
158 #define TWA_STATUS_ERRORS(x)			\
159 	((x & TWA_STATUS_UNEXPECTED_BITS) &&	\
160 	 (x & TWA_STATUS_MICROCONTROLLER_READY))
161 
162 /* PCI related defines. */
163 #define TWA_IO_CONFIG_REG		0x10
164 #define TWA_DEVICE_NAME			"3ware 9000 series Storage Controller"
165 #define TWA_VENDOR_ID			0x13C1
166 #define TWA_DEVICE_ID_9K		0x1002
167 
168 #define TWA_PCI_CONFIG_CLEAR_PARITY_ERROR	0xc100
169 #define TWA_PCI_CONFIG_CLEAR_PCI_ABORT		0x2000
170 #define TWA_9550SX_DRAIN_COMPLETE		0xffff
171 
172 /* Command packet opcodes. */
173 #define TWA_OP_NOP			0x00
174 #define TWA_OP_INIT_CONNECTION		0x01
175 #define TWA_OP_READ			0x02
176 #define TWA_OP_WRITE			0x03
177 #define TWA_OP_READVERIFY		0x04
178 #define TWA_OP_VERIFY			0x05
179 #define TWA_OP_ZEROUNIT			0x08
180 #define TWA_OP_REPLACEUNIT		0x09
181 #define TWA_OP_HOTSWAP			0x0A
182 #define TWA_OP_SELFTESTS		0x0B
183 #define TWA_OP_SYNC_PARAM		0x0C
184 #define TWA_OP_REORDER_UNITS		0x0D
185 #define TWA_OP_FLUSH			0x0E
186 #define TWA_OP_EXECUTE_SCSI_COMMAND	0x10
187 #define TWA_OP_ATA_PASSTHROUGH		0x11
188 #define TWA_OP_GET_PARAM		0x12
189 #define TWA_OP_SET_PARAM		0x13
190 #define TWA_OP_CREATEUNIT		0x14
191 #define TWA_OP_DELETEUNIT		0x15
192 #define TWA_OP_DOWNLOAD_FIRMWARE	0x16
193 #define TWA_OP_REBUILDUNIT		0x17
194 #define TWA_OP_POWER_MANAGEMENT		0x18
195 
196 #define TWA_OP_REMOTE_PRINT		0x1B
197 #define TWA_OP_RESET_FIRMWARE		0x1C
198 #define TWA_OP_DEBUG			0x1D
199 
200 #define TWA_OP_DIAGNOSTICS		0x1F
201 
202 /* Misc defines. */
203 #define TWA_ALIGNMENT			0x4
204 #define TWA_MAX_UNITS			16
205 #define TWA_9650_MAX_UNITS		32
206 #define TWA_9690_MAX_UNITS		32
207 #define TWA_INIT_MESSAGE_CREDITS	0x100
208 #define TWA_SHUTDOWN_MESSAGE_CREDITS	0x001
209 #define TWA_64BIT_SG_ADDRESSES		0x00000001
210 #define TWA_EXTENDED_INIT_CONNECT	0x00000002
211 #define TWA_BASE_MODE			1
212 #define TWA_BASE_FW_SRL			24
213 #define TWA_BASE_FW_BRANCH		0
214 #define TWA_BASE_FW_BUILD		1
215 #define TWA_CURRENT_FW_SRL		28
216 #define TWA_CURRENT_FW_BRANCH		4
217 #define TWA_CURRENT_FW_BUILD		9
218 #define TWA_9000_ARCH_ID		0x5	/* 9000 series controllers */
219 #define TWA_CTLR_FW_SAME_OR_NEWER	0x00000001
220 #define TWA_CTLR_FW_COMPATIBLE		0x00000002
221 #define TWA_BUNDLED_FW_SAFE_TO_FLASH	0x00000004
222 #define TWA_CTLR_FW_RECOMMENDS_FLASH	0x00000008
223 #define NUM_FW_IMAGE_CHUNKS		5
224 #define TWA_MAX_IO_SIZE			0x20000	/* 128K */
225 /* #define TWA_MAX_SG_ELEMENTS		defined above */
226 #define TWA_MAX_ATA_SG_ELEMENTS		60
227 #define TWA_Q_LENGTH			TWA_INIT_MESSAGE_CREDITS
228 #define TWA_MAX_RESET_TRIES		3
229 #define TWA_SECTOR_SIZE			0x200	/* generic I/O bufffer */
230 #define TWA_SENSE_DATA_LENGTH		18
231 #define TWA_MICROSECOND                 1000000
232 #define TWA_ERROR_LOGICAL_UNIT_NOT_SUPPORTED	0x010a
233 #define TWA_ERROR_UNIT_OFFLINE			0x0128
234 #define TWA_ERROR_MORE_DATA			0x0231
235 
236 /* Scatter/Gather list entry. */
237 struct twa_sg {
238 #if defined(_KERNEL)
239 	bus_addr_t	address;
240 #else
241 	uint32_t	xx_address_xx;	/* Fail if userland tries to use this */
242 #endif
243 	uint32_t	length;
244 } __packed;
245 
246 
247 /* 7000 structures. */
248 struct twa_command_init_connect {
249 	uint8_t		opcode:5;	/* TWA_OP_INITCONNECTION */
250 	uint8_t		res1:3;
251 	uint8_t		size;
252 	uint8_t		request_id;
253 	uint8_t		res2;
254 	uint8_t		status;
255 	uint8_t		flags;
256 	uint16_t	message_credits;
257 	uint32_t	features;
258 	uint16_t	fw_srl;
259 	uint16_t	fw_arch_id;
260 	uint16_t	fw_branch;
261 	uint16_t	fw_build;
262 	uint32_t	result;
263 }__packed;
264 
265 struct twa_command_download_firmware {
266 	uint8_t		opcode:5;	/* TWA_DOWNLOAD_FIRMWARE */
267 	uint8_t		sgl_offset:3;
268 	uint8_t		size;
269 	uint8_t		request_id;
270 	uint8_t		unit;
271 	uint8_t		status;
272 	uint8_t		flags;
273 	uint16_t	param;
274 	uint8_t		sgl[1];
275 } __packed;
276 
277 
278 struct twa_command_reset_firmware {
279 	uint8_t		opcode:5;	/* TWA_OP_RESET_FIRMWARE */
280 	uint8_t		res1:3;
281 	uint8_t		size;
282 	uint8_t		request_id;
283 	uint8_t		unit;
284 	uint8_t		status;
285 	uint8_t		flags;
286 	uint8_t		res2;
287 	uint8_t		param;
288 } __packed;
289 
290 
291 struct twa_command_io {
292 	uint8_t		opcode:5;	/* TWA_OP_READ/TWA_OP_WRITE */
293 	uint8_t		sgl_offset:3;
294 	uint8_t		size;
295 	uint8_t		request_id;
296 	uint8_t		unit:4;
297 	uint8_t		host_id:4;
298 	uint8_t		status;
299 	uint8_t		flags;
300 	uint16_t	block_count;
301 	uint32_t	lba;
302 	struct twa_sg	sgl[TWA_MAX_SG_ELEMENTS];
303 } __packed;
304 
305 
306 struct twa_command_hotswap {
307 	uint8_t		opcode:5;	/* TWA_OP_HOTSWAP */
308 	uint8_t		res1:3;
309 	uint8_t		size;
310 	uint8_t		request_id;
311 	uint8_t		unit:4;
312 	uint8_t		host_id:4;
313 	uint8_t		status;
314 	uint8_t		flags;
315 	uint8_t		action;
316 #define TWA_OP_HOTSWAP_REMOVE		0x00	/* remove assumed-degraded unit */
317 #define TWA_OP_HOTSWAP_ADD_CBOD		0x01	/* add CBOD to empty port */
318 #define TWA_OP_HOTSWAP_ADD_SPARE	0x02	/* add spare to empty port */
319 	uint8_t		aport;
320 } __packed;
321 
322 
323 struct twa_command_param {
324 	uint8_t		opcode:5;	/* TWA_OP_GETPARAM, TWA_OP_SETPARAM */
325 	uint8_t		sgl_offset:3;
326 	uint8_t		size;
327 	uint8_t		request_id;
328 	uint8_t		unit:4;
329 	uint8_t		host_id:4;
330 	uint8_t		status;
331 	uint8_t		flags;
332 	uint16_t	param_count;
333 	uint8_t		sgl[1];
334 } __packed;
335 
336 
337 struct twa_command_rebuildunit {
338 	uint8_t		opcode:5;	/* TWA_OP_REBUILDUNIT */
339 	uint8_t		res1:3;
340 	uint8_t		size;
341 	uint8_t		request_id;
342 	uint8_t		src_unit:4;
343 	uint8_t		host_id:4;
344 	uint8_t		status;
345 	uint8_t		flags;
346 	uint8_t		action:7;
347 #define TWA_OP_REBUILDUNIT_NOP		0
348 #define TWA_OP_REBUILDUNIT_STOP		2	/* stop all rebuilds */
349 #define TWA_OP_REBUILDUNIT_START	4	/* start rebuild with lowest unit */
350 #define TWA_OP_REBUILDUNIT_STARTUNIT	5	/* rebuild src_unit (not supported) */
351 	uint8_t		cs:1;			/* request state change on src_unit */
352 	uint8_t		logical_subunit;	/* for RAID10 rebuild of logical subunit */
353 } __packed;
354 
355 
356 struct twa_command_ata {
357 	uint8_t		opcode:5;	/* TWA_OP_ATA_PASSTHROUGH */
358 	uint8_t		sgl_offset:3;
359 	uint8_t		size;
360 	uint8_t		request_id;
361 	uint8_t		unit:4;
362 	uint8_t		host_id:4;
363 	uint8_t		status;
364 	uint8_t		flags;
365 	uint16_t	param;
366 	uint16_t	features;
367 	uint16_t	sector_count;
368 	uint16_t	sector_num;
369 	uint16_t	cylinder_lo;
370 	uint16_t	cylinder_hi;
371 	uint8_t		drive_head;
372 	uint8_t		command;
373 	struct twa_sg	sgl[TWA_MAX_ATA_SG_ELEMENTS];
374 } __packed;
375 
376 
377 struct twa_command_generic {
378 	uint8_t		opcode:5;
379 	uint8_t		sgl_offset:3;
380 	uint8_t		size;
381 	uint8_t		request_id;
382 	uint8_t		unit:4;
383 	uint8_t		host_id:4;
384 	uint8_t		status;
385 	uint8_t		flags;
386 #define TWA_FLAGS_SUCCESS	0x00
387 #define TWA_FLAGS_INFORMATIONAL	0x01
388 #define TWA_FLAGS_WARNING	0x02
389 #define TWA_FLAGS_FATAL		0x03
390 #define TWA_FLAGS_PERCENTAGE	(1<<8)	/* bits 0-6 indicate completion percentage */
391 	uint16_t	count;		/* block count, parameter count, message credits */
392 } __packed;
393 
394 /* Command packet header. */
395 #pragma pack(1)
396 struct twa_command_header {
397 	uint8_t		sense_data[TWA_SENSE_DATA_LENGTH];
398 	struct {
399 		int8_t		reserved[4];
400 		uint16_t	error;
401 		uint8_t		padding;
402 		struct {
403 			uint8_t		severity:3;
404 			uint8_t		reserved:5;
405 		} substatus_block;
406 	} status_block;
407 	uint8_t		err_specific_desc[98];
408 	struct {
409 		uint8_t		size_header;
410 		uint16_t	reserved;
411 		uint8_t		size_sense;
412 	} header_desc;
413 } __packed;
414 #pragma pack()
415 
416 
417 /* Command packet - must be TWA_ALIGNMENT aligned. */
418 union twa_command_7k {
419 	struct twa_command_init_connect		init_connect;
420 	struct twa_command_download_firmware	download_fw;
421 	struct twa_command_reset_firmware	reset_fw;
422 	struct twa_command_param		param;
423 	struct twa_command_generic		generic;
424 	uint8_t padding[1024 - sizeof(struct twa_command_header)];
425 } __packed;
426 
427 
428 /* 9000 structures. */
429 
430 /* Command Packet. */
431 struct twa_command_9k {
432 	struct {
433 		uint8_t		opcode:5;
434 		uint8_t		reserved:3;
435 	} command;
436 	uint8_t		unit;
437 	uint16_t	request_id;
438 	uint8_t		status;
439 	uint8_t		sgl_offset; /* offset (in bytes) to sg_list, from the end of sgl_entries */
440 	uint16_t	sgl_entries;
441 	uint8_t		cdb[16];
442 	struct twa_sg	sg_list[TWA_MAX_SG_ELEMENTS];
443 	uint8_t		padding[32];
444 } __packed;
445 
446 
447 
448 /* Full command packet. */
449 struct twa_command_packet {
450 	struct twa_command_header	cmd_hdr;
451 	union {
452 		union twa_command_7k	cmd_pkt_7k;
453 		struct twa_command_9k 	cmd_pkt_9k;
454 	} command;
455 } __packed;
456 
457 
458 /* Response queue entry. */
459 union twa_response_queue {
460 	struct {
461 		uint32_t	undefined_1:4;
462 		uint32_t	response_id:8;
463 		uint32_t	undefined_2:20;
464 	} u;
465 	uint32_t	value;
466 } __packed;
467 
468 
469 #define TWA_AEN_QUEUE_EMPTY		0x00
470 #define TWA_AEN_SOFT_RESET		0x01
471 #define TWA_AEN_SYNC_TIME_WITH_HOST	0x31
472 #define TWA_AEN_SEVERITY_ERROR		0x1
473 #define TWA_AEN_SEVERITY_WARNING	0x2
474 #define TWA_AEN_SEVERITY_INFO		0x3
475 #define TWA_AEN_SEVERITY_DEBUG		0x4
476 
477 #define	TWA_PARAM_DRIVESUMMARY		0x0002
478 #define TWA_PARAM_DRIVESTATUS		3
479 
480 #define TWA_DRIVE_DETECTED		0x80
481 
482 #define	TWA_PARAM_DRIVE_TABLE		0x0200
483 #define TWA_PARAM_DRIVESIZEINDEX	2
484 #define TWA_PARAM_DRIVEMODELINDEX	3
485 
486 #define TWA_PARAM_DRIVESIZE_LENGTH	4
487 #define TWA_PARAM_DRIVEMODEL_LENGTH	40
488 
489 
490 #define TWA_PARAM_VERSION		0x0402
491 #define TWA_PARAM_VERSION_Mon		2	/* monitor version [16] */
492 #define TWA_PARAM_VERSION_FW		3	/* firmware version [16] */
493 #define TWA_PARAM_VERSION_BIOS		4	/* BIOSs version [16] */
494 #define TWA_PARAM_VERSION_PCBA		5	/* PCB version [8] */
495 #define TWA_PARAM_VERSION_ATA		6	/* A-chip version [8] */
496 #define TWA_PARAM_VERSION_PCI		7	/* P-chip version [8] */
497 
498 #define TWA_PARAM_CONTROLLER		0x0403
499 #define TWA_PARAM_CONTROLLER_PortCount	3	/* number of ports [1] */
500 
501 #define TWA_PARAM_TIME_TABLE		0x40A
502 #define TWA_PARAM_TIME_SchedulerTime	0x3
503 
504 #define TWA_9K_PARAM_DESCRIPTOR		0x8000
505 
506 
507 struct twa_param_9k {
508 	uint16_t	table_id;
509 	uint8_t		parameter_id;
510 	uint8_t		reserved;
511 	uint16_t	parameter_size_bytes;
512 	uint16_t	parameter_actual_size_bytes;
513 	uint8_t		data[1];
514 } __packed;
515 
516 #endif	/* !_PCI_TWAREG_H_ */
517