scsi.c@ 81851

Last change on this file since 81851 was 81412, checked in by vboxsync, 5 years ago
PC/BIOS: Move the generic SCSI definitions out of scsi.c into a separate header
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 24.5 KB

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1	/* $Id: scsi.c 81412 2019-10-21 13:29:39Z vboxsync $ */
2	/** @file
3	* SCSI host adapter driver to boot from SCSI disks
4	*/
5
6	/*
7	* Copyright (C) 2004-2019 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18	#include <stdint.h>
19	#include <string.h>
20	#include "biosint.h"
21	#include "inlines.h"
22	#include "pciutil.h"
23	#include "ebda.h"
24	#include "scsi.h"
25
26
27	#if DEBUG_SCSI
28	# define DBG_SCSI(...) BX_INFO(__VA_ARGS__)
29	#else
30	# define DBG_SCSI(...)
31	#endif
32
33	#define VBSCSI_BUSY (1 << 0)
34	#define VBSCSI_ERROR (1 << 1)
35
36	/* The I/O port of the BusLogic SCSI adapter. */
37	#define BUSLOGIC_BIOS_IO_PORT 0x430
38	/* The I/O port of the LsiLogic SCSI adapter. */
39	#define LSILOGIC_BIOS_IO_PORT 0x434
40	/* The I/O port of the LsiLogic SAS adapter. */
41	#define LSILOGIC_SAS_BIOS_IO_PORT 0x438
42
43	#define VBSCSI_REGISTER_STATUS 0
44	#define VBSCSI_REGISTER_COMMAND 0
45	#define VBSCSI_REGISTER_DATA_IN 1
46	#define VBSCSI_REGISTER_IDENTIFY 2
47	#define VBSCSI_REGISTER_RESET 3
48	#define VBSCSI_REGISTER_DEVSTAT 3
49
50	#define VBSCSI_MAX_DEVICES 16 /* Maximum number of devices a SCSI device can have. */
51
52	/* Data transfer direction. */
53	#define SCSI_TXDIR_FROM_DEVICE 0
54	#define SCSI_TXDIR_TO_DEVICE 1
55
56	#pragma pack(1)
57
58	/* READ_10/WRITE_10 CDB layout. */
59	typedef struct {
60	uint16_t command; /* Command. */
61	uint32_t lba; /* LBA, MSB first! */
62	uint8_t pad1; /* Unused. */
63	uint16_t nsect; /* Sector count, MSB first! */
64	uint8_t pad2; /* Unused. */
65	} cdb_rw10;
66
67	/* READ_16/WRITE_16 CDB layout. */
68	typedef struct {
69	uint16_t command; /* Command. */
70	uint64_t lba; /* LBA, MSB first! */
71	uint32_t nsect32; /* Sector count, MSB first! */
72	uint8_t pad1; /* Unused. */
73	uint8_t pad2; /* Unused. */
74	} cdb_rw16;
75
76	#pragma pack()
77
78	ct_assert(sizeof(cdb_rw10) == 10);
79	ct_assert(sizeof(cdb_rw16) == 16);
80
81	void insb_discard(unsigned nbytes, unsigned port);
82	#pragma aux insb_discard = \
83	".286" \
84	"again:" \
85	"in al,dx" \
86	"loop again" \
87	parm [cx] [dx] modify exact [cx ax] nomemory;
88
89
90	int scsi_cmd_data_in(uint16_t io_base, uint8_t target_id, uint8_t __far *aCDB,
91	uint8_t cbCDB, uint8_t __far *buffer, uint32_t length)
92	{
93	/* Check that the adapter is ready. */
94	uint8_t status, sizes;
95	uint16_t i;
96
97	do
98	status = inb(io_base + VBSCSI_REGISTER_STATUS);
99	while (status & VBSCSI_BUSY);
100
101	sizes = ((length >> 12) & 0xF0) \| ((cbCDB == 16) ? 0 : cbCDB);
102	outb(io_base + VBSCSI_REGISTER_COMMAND, target_id); /* Write the target ID. */
103	outb(io_base + VBSCSI_REGISTER_COMMAND, SCSI_TXDIR_FROM_DEVICE); /* Write the transfer direction. */
104	outb(io_base + VBSCSI_REGISTER_COMMAND, sizes); /* Write CDB size and top bufsize bits. */
105	outb(io_base + VBSCSI_REGISTER_COMMAND, length); /* Write the buffer size. */
106	outb(io_base + VBSCSI_REGISTER_COMMAND, (length >> 8));
107	for (i = 0; i < cbCDB; i++) /* Write the CDB. */
108	outb(io_base + VBSCSI_REGISTER_COMMAND, aCDB[i]);
109
110	/* Now wait for the command to complete. */
111	do
112	status = inb(io_base + VBSCSI_REGISTER_STATUS);
113	while (status & VBSCSI_BUSY);
114
115	/* If any error occurred, inform the caller and don't bother reading the data. */
116	if (status & VBSCSI_ERROR) {
117	outb(io_base + VBSCSI_REGISTER_RESET, 0);
118
119	status = inb(io_base + VBSCSI_REGISTER_DEVSTAT);
120	DBG_SCSI("%s: read failed, device status %02X\n", __func__, status);
121	return 4; /* Sector not found */
122	}
123
124	/* Read in the data. The transfer length may be exactly 64K or more,
125	* which needs a bit of care when we're using 16-bit 'rep ins'.
126	*/
127	while (length > 32768) {
128	DBG_SCSI("%s: reading 32K to %X:%X\n", __func__, FP_SEG(buffer), FP_OFF(buffer));
129	rep_insb(buffer, 32768, io_base + VBSCSI_REGISTER_DATA_IN);
130	length -= 32768;
131	buffer = (FP_SEG(buffer) + (32768 >> 4)) :> FP_OFF(buffer);
132	}
133
134	DBG_SCSI("%s: reading %ld bytes to %X:%X\n", __func__, length, FP_SEG(buffer), FP_OFF(buffer));
135	rep_insb(buffer, length, io_base + VBSCSI_REGISTER_DATA_IN);
136
137	return 0;
138	}
139
140	int scsi_cmd_data_out(uint16_t io_base, uint8_t target_id, uint8_t __far *aCDB,
141	uint8_t cbCDB, uint8_t __far *buffer, uint32_t length)
142	{
143	/* Check that the adapter is ready. */
144	uint8_t status, sizes;
145	uint16_t i;
146
147	do
148	status = inb(io_base + VBSCSI_REGISTER_STATUS);
149	while (status & VBSCSI_BUSY);
150
151
152	sizes = ((length >> 12) & 0xF0) \| ((cbCDB == 16) ? 0 : cbCDB);
153	outb(io_base + VBSCSI_REGISTER_COMMAND, target_id); /* Write the target ID. */
154	outb(io_base + VBSCSI_REGISTER_COMMAND, SCSI_TXDIR_TO_DEVICE); /* Write the transfer direction. */
155	outb(io_base + VBSCSI_REGISTER_COMMAND, sizes); /* Write CDB size and top bufsize bits. */
156	outb(io_base + VBSCSI_REGISTER_COMMAND, length); /* Write the buffer size. */
157	outb(io_base + VBSCSI_REGISTER_COMMAND, (length >> 8));
158	for (i = 0; i < cbCDB; i++) /* Write the CDB. */
159	outb(io_base + VBSCSI_REGISTER_COMMAND, aCDB[i]);
160
161	/* Write out the data. The transfer length may be exactly 64K or more,
162	* which needs a bit of care when we're using 16-bit 'rep outs'.
163	*/
164	while (length > 32768) {
165	DBG_SCSI("%s: writing 32K from %X:%X\n", __func__, FP_SEG(buffer), FP_OFF(buffer));
166	rep_outsb(buffer, 32768, io_base + VBSCSI_REGISTER_DATA_IN);
167	length -= 32768;
168	buffer = (FP_SEG(buffer) + (32768 >> 4)) :> FP_OFF(buffer);
169	}
170
171	DBG_SCSI("%s: writing %ld bytes from %X:%X\n", __func__, length, FP_SEG(buffer), FP_OFF(buffer));
172	rep_outsb(buffer, length, io_base + VBSCSI_REGISTER_DATA_IN);
173
174	/* Now wait for the command to complete. */
175	do
176	status = inb(io_base + VBSCSI_REGISTER_STATUS);
177	while (status & VBSCSI_BUSY);
178
179	/* If any error occurred, inform the caller. */
180	if (status & VBSCSI_ERROR) {
181	outb(io_base + VBSCSI_REGISTER_RESET, 0);
182
183	status = inb(io_base + VBSCSI_REGISTER_DEVSTAT);
184	DBG_SCSI("%s: write failed, device status %02X\n", __func__, status);
185	return 4; /* Sector not found */
186	}
187
188	return 0;
189	}
190
191	/**
192	* Read sectors from an attached SCSI device.
193	*
194	* @returns status code.
195	* @param bios_dsk Pointer to disk request packet (in the
196	* EBDA).
197	*/
198	int scsi_read_sectors(bio_dsk_t __far *bios_dsk)
199	{
200	uint8_t rc;
201	cdb_rw16 cdb;
202	uint32_t count;
203	uint16_t io_base;
204	uint8_t target_id;
205	uint8_t device_id;
206
207	device_id = VBOX_GET_SCSI_DEVICE(bios_dsk->drqp.dev_id);
208	if (device_id > BX_MAX_SCSI_DEVICES)
209	BX_PANIC("%s: device_id out of range %d\n", __func__, device_id);
210
211	count = bios_dsk->drqp.nsect;
212
213	/* Prepare a CDB. */
214	cdb.command = SCSI_READ_16;
215	cdb.lba = swap_64(bios_dsk->drqp.lba);
216	cdb.pad1 = 0;
217	cdb.nsect32 = swap_32(count);
218	cdb.pad2 = 0;
219
220
221	io_base = bios_dsk->scsidev[device_id].io_base;
222	target_id = bios_dsk->scsidev[device_id].target_id;
223
224	DBG_SCSI("%s: reading %u sectors, device %d, target %d\n", __func__,
225	count, device_id, bios_dsk->scsidev[device_id].target_id);
226
227	rc = scsi_cmd_data_in(io_base, target_id, (void __far *)&cdb, 16,
228	bios_dsk->drqp.buffer, (count * 512L));
229
230	if (!rc)
231	{
232	bios_dsk->drqp.trsfsectors = count;
233	bios_dsk->drqp.trsfbytes = count * 512L;
234	}
235	DBG_SCSI("%s: transferred %u sectors\n", __func__, bios_dsk->drqp.nsect);
236
237	return rc;
238	}
239
240	/**
241	* Write sectors to an attached SCSI device.
242	*
243	* @returns status code.
244	* @param bios_dsk Pointer to disk request packet (in the
245	* EBDA).
246	*/
247	int scsi_write_sectors(bio_dsk_t __far *bios_dsk)
248	{
249	uint8_t rc;
250	cdb_rw16 cdb;
251	uint32_t count;
252	uint16_t io_base;
253	uint8_t target_id;
254	uint8_t device_id;
255
256	device_id = VBOX_GET_SCSI_DEVICE(bios_dsk->drqp.dev_id);
257	if (device_id > BX_MAX_SCSI_DEVICES)
258	BX_PANIC("%s: device_id out of range %d\n", __func__, device_id);
259
260	count = bios_dsk->drqp.nsect;
261
262	/* Prepare a CDB. */
263	cdb.command = SCSI_WRITE_16;
264	cdb.lba = swap_64(bios_dsk->drqp.lba);
265	cdb.pad1 = 0;
266	cdb.nsect32 = swap_32(count);
267	cdb.pad2 = 0;
268
269	io_base = bios_dsk->scsidev[device_id].io_base;
270	target_id = bios_dsk->scsidev[device_id].target_id;
271
272	DBG_SCSI("%s: writing %u sectors, device %d, target %d\n", __func__,
273	count, device_id, bios_dsk->scsidev[device_id].target_id);
274
275	rc = scsi_cmd_data_out(io_base, target_id, (void __far *)&cdb, 16,
276	bios_dsk->drqp.buffer, (count * 512L));
277
278	if (!rc)
279	{
280	bios_dsk->drqp.trsfsectors = count;
281	bios_dsk->drqp.trsfbytes = (count * 512L);
282	}
283	DBG_SCSI("%s: transferred %u sectors\n", __func__, bios_dsk->drqp.nsect);
284
285	return rc;
286	}
287
288
289	/// @todo move
290	#define ATA_DATA_NO 0x00
291	#define ATA_DATA_IN 0x01
292	#define ATA_DATA_OUT 0x02
293
294	/**
295	* Perform a "packet style" read with supplied CDB.
296	*
297	* @returns status code.
298	* @param device_id ID of the device to access.
299	* @param cmdlen Length of the CDB.
300	* @param cmdbuf The CDB buffer.
301	* @param before How much to skip before reading into the provided data buffer.
302	* @param length How much to transfer.
303	* @param inout Read/Write direction indicator.
304	* @param buffer Data buffer to store the data from the device in.
305	*/
306	uint16_t scsi_cmd_packet(uint16_t device_id, uint8_t cmdlen, char __far *cmdbuf,
307	uint16_t before, uint32_t length, uint8_t inout, char __far *buffer)
308	{
309	bio_dsk_t __far *bios_dsk = read_word(0x0040, 0x000E) :> &EbdaData->bdisk;
310	uint32_t read_len;
311	uint8_t status, sizes;
312	uint16_t i;
313	uint16_t io_base;
314	uint8_t target_id;
315
316	/* Data out is currently not supported. */
317	if (inout == ATA_DATA_OUT) {
318	BX_INFO("%s: DATA_OUT not supported yet\n", __func__);
319	return 1;
320	}
321
322	/* Convert to SCSI specific device number. */
323	device_id = VBOX_GET_SCSI_DEVICE(device_id);
324
325	DBG_SCSI("%s: reading %lu bytes, skip %u/%u, device %d, target %d\n", __func__,
326	length, bios_dsk->drqp.skip_b, bios_dsk->drqp.skip_a,
327	device_id, bios_dsk->scsidev[device_id].target_id);
328	DBG_SCSI("%s: reading %u %u-byte sectors\n", __func__,
329	bios_dsk->drqp.nsect, bios_dsk->drqp.sect_sz);
330
331	cmdlen -= 2; /* ATAPI uses 12-byte command packets for a READ 10. */
332
333	io_base = bios_dsk->scsidev[device_id].io_base;
334	target_id = bios_dsk->scsidev[device_id].target_id;
335
336	/* Wait until the adapter is ready. */
337	do
338	status = inb(io_base + VBSCSI_REGISTER_STATUS);
339	while (status & VBSCSI_BUSY);
340
341	/* On the SCSI level, we have to transfer whole sectors. */
342	/* NB: With proper residual length support, this should not be necessary; we should
343	* be able to avoid transferring the 'after' part of the sector.
344	*/
345	read_len = length + before + bios_dsk->drqp.skip_a;
346
347	sizes = (((read_len) >> 12) & 0xF0) \| cmdlen;
348	outb(io_base + VBSCSI_REGISTER_COMMAND, target_id); /* Write the target ID. */
349	outb(io_base + VBSCSI_REGISTER_COMMAND, SCSI_TXDIR_FROM_DEVICE); /* Write the transfer direction. */
350	outb(io_base + VBSCSI_REGISTER_COMMAND, sizes); /* Write the CDB size. */
351	outb(io_base + VBSCSI_REGISTER_COMMAND, read_len); /* Write the buffer size. */
352	outb(io_base + VBSCSI_REGISTER_COMMAND, (read_len) >> 8);
353	for (i = 0; i < cmdlen; i++) /* Write the CDB. */
354	outb(io_base + VBSCSI_REGISTER_COMMAND, cmdbuf[i]);
355
356	/* Now wait for the command to complete. */
357	do
358	status = inb(io_base + VBSCSI_REGISTER_STATUS);
359	while (status & VBSCSI_BUSY);
360
361	/* If any error occurred, inform the caller and don't bother reading the data. */
362	if (status & VBSCSI_ERROR) {
363	outb(io_base + VBSCSI_REGISTER_RESET, 0);
364
365	status = inb(io_base + VBSCSI_REGISTER_DEVSTAT);
366	DBG_SCSI("%s: read failed, device status %02X\n", __func__, status);
367	return 3;
368	}
369
370	/* Transfer the data read from the device. */
371
372	if (before) /* If necessary, throw away data which needs to be skipped. */
373	insb_discard(before, io_base + VBSCSI_REGISTER_DATA_IN);
374
375	bios_dsk->drqp.trsfbytes = length;
376
377	/* The requested length may be exactly 64K or more, which needs
378	* a bit of care when we're using 16-bit 'rep ins'.
379	*/
380	while (length > 32768) {
381	DBG_SCSI("%s: reading 32K to %X:%X\n", __func__, FP_SEG(buffer), FP_OFF(buffer));
382	rep_insb(buffer, 32768, io_base + VBSCSI_REGISTER_DATA_IN);
383	length -= 32768;
384	buffer = (FP_SEG(buffer) + (32768 >> 4)) :> FP_OFF(buffer);
385	}
386
387	DBG_SCSI("%s: reading %ld bytes to %X:%X\n", __func__, length, FP_SEG(buffer), FP_OFF(buffer));
388	rep_insb(buffer, length, io_base + VBSCSI_REGISTER_DATA_IN);
389
390	if (bios_dsk->drqp.skip_a) /* If necessary, throw away more data. */
391	insb_discard(bios_dsk->drqp.skip_a, io_base + VBSCSI_REGISTER_DATA_IN);
392
393	return 0;
394	}
395
396	/**
397	* Enumerate attached devices.
398	*
399	* @returns nothing.
400	* @param io_base The I/O base port of the controller.
401	*/
402	void scsi_enumerate_attached_devices(uint16_t io_base)
403	{
404	int i;
405	uint8_t buffer[0x0200];
406	bio_dsk_t __far *bios_dsk;
407
408	bios_dsk = read_word(0x0040, 0x000E) :> &EbdaData->bdisk;
409
410	/* Go through target devices. */
411	for (i = 0; i < VBSCSI_MAX_DEVICES; i++)
412	{
413	uint8_t rc;
414	uint8_t aCDB[16];
415	uint8_t hd_index, devcount_scsi;
416
417	aCDB[0] = SCSI_INQUIRY;
418	aCDB[1] = 0;
419	aCDB[2] = 0;
420	aCDB[3] = 0;
421	aCDB[4] = 5; /* Allocation length. */
422	aCDB[5] = 0;
423
424	rc = scsi_cmd_data_in(io_base, i, aCDB, 6, buffer, 5);
425	if (rc != 0)
426	BX_PANIC("%s: SCSI_INQUIRY failed\n", __func__);
427
428	devcount_scsi = bios_dsk->scsi_devcount;
429
430	/* Check the attached device. */
431	if ( ((buffer[0] & 0xe0) == 0)
432	&& ((buffer[0] & 0x1f) == 0x00))
433	{
434	DBG_SCSI("%s: Disk detected at %d\n", __func__, i);
435
436	/* We add the disk only if the maximum is not reached yet. */
437	if (devcount_scsi < BX_MAX_SCSI_DEVICES)
438	{
439	uint64_t sectors, t;
440	uint32_t sector_size, cylinders;
441	uint16_t heads, sectors_per_track;
442	uint8_t hdcount;
443	uint8_t cmos_base;
444
445	/* Issue a read capacity command now. */
446	_fmemset(aCDB, 0, sizeof(aCDB));
447	aCDB[0] = SCSI_SERVICE_ACT;
448	aCDB[1] = SCSI_READ_CAP_16;
449	aCDB[13] = 32; /* Allocation length. */
450
451	rc = scsi_cmd_data_in(io_base, i, aCDB, 16, buffer, 32);
452	if (rc != 0)
453	BX_PANIC("%s: SCSI_READ_CAPACITY failed\n", __func__);
454
455	/* The value returned is the last addressable LBA, not
456	* the size, which what "+ 1" is for.
457	*/
458	sectors = swap_64((uint64_t )buffer) + 1;
459
460	sector_size = ((uint32_t)buffer[8] << 24)
461	\| ((uint32_t)buffer[9] << 16)
462	\| ((uint32_t)buffer[10] << 8)
463	\| ((uint32_t)buffer[11]);
464
465	/* We only support the disk if sector size is 512 bytes. */
466	if (sector_size != 512)
467	{
468	/* Leave a log entry. */
469	BX_INFO("Disk %d has an unsupported sector size of %u\n", i, sector_size);
470	continue;
471	}
472
473	/* Get logical CHS geometry. */
474	switch (devcount_scsi)
475	{
476	case 0:
477	cmos_base = 0x90;
478	break;
479	case 1:
480	cmos_base = 0x98;
481	break;
482	case 2:
483	cmos_base = 0xA0;
484	break;
485	case 3:
486	cmos_base = 0xA8;
487	break;
488	default:
489	cmos_base = 0;
490	}
491
492	if (cmos_base && inb_cmos(cmos_base + 7))
493	{
494	/* If provided, grab the logical geometry from CMOS. */
495	cylinders = inb_cmos(cmos_base + 0) + (inb_cmos(cmos_base + 1) << 8);
496	heads = inb_cmos(cmos_base + 2);
497	sectors_per_track = inb_cmos(cmos_base + 7);
498	}
499	else
500	{
501	/* Calculate default logical geometry. NB: Very different
502	* from default ATA/SATA logical geometry!
503	*/
504	if (sectors >= (uint32_t)4 * 1024 * 1024)
505	{
506	heads = 255;
507	sectors_per_track = 63;
508	/* Approximate x / (255 * 63) using shifts */
509	t = (sectors >> 6) + (sectors >> 12);
510	cylinders = (t >> 8) + (t >> 16);
511	}
512	else if (sectors >= (uint32_t)2 * 1024 * 1024)
513	{
514	heads = 128;
515	sectors_per_track = 32;
516	cylinders = sectors >> 12;
517	}
518	else
519	{
520	heads = 64;
521	sectors_per_track = 32;
522	cylinders = sectors >> 11;
523	}
524	}
525
526	/* Calculate index into the generic disk table. */
527	hd_index = devcount_scsi + BX_MAX_ATA_DEVICES;
528
529	bios_dsk->scsidev[devcount_scsi].io_base = io_base;
530	bios_dsk->scsidev[devcount_scsi].target_id = i;
531	bios_dsk->devices[hd_index].type = DSK_TYPE_SCSI;
532	bios_dsk->devices[hd_index].device = DSK_DEVICE_HD;
533	bios_dsk->devices[hd_index].removable = 0;
534	bios_dsk->devices[hd_index].lock = 0;
535	bios_dsk->devices[hd_index].blksize = sector_size;
536	bios_dsk->devices[hd_index].translation = GEO_TRANSLATION_LBA;
537
538	/* Write LCHS/PCHS values. */
539	bios_dsk->devices[hd_index].lchs.heads = heads;
540	bios_dsk->devices[hd_index].lchs.spt = sectors_per_track;
541	bios_dsk->devices[hd_index].pchs.heads = heads;
542	bios_dsk->devices[hd_index].pchs.spt = sectors_per_track;
543
544	if (cylinders > 1024) {
545	bios_dsk->devices[hd_index].lchs.cylinders = 1024;
546	bios_dsk->devices[hd_index].pchs.cylinders = 1024;
547	} else {
548	bios_dsk->devices[hd_index].lchs.cylinders = (uint16_t)cylinders;
549	bios_dsk->devices[hd_index].pchs.cylinders = (uint16_t)cylinders;
550	}
551
552	BX_INFO("SCSI %d-ID#%d: LCHS=%lu/%u/%u 0x%llx sectors\n", devcount_scsi,
553	i, (uint32_t)cylinders, heads, sectors_per_track, sectors);
554
555	bios_dsk->devices[hd_index].sectors = sectors;
556
557	/* Store the id of the disk in the ata hdidmap. */
558	hdcount = bios_dsk->hdcount;
559	bios_dsk->hdidmap[hdcount] = devcount_scsi + BX_MAX_ATA_DEVICES;
560	hdcount++;
561	bios_dsk->hdcount = hdcount;
562
563	/* Update hdcount in the BDA. */
564	hdcount = read_byte(0x40, 0x75);
565	hdcount++;
566	write_byte(0x40, 0x75, hdcount);
567
568	devcount_scsi++;
569	}
570	else
571	{
572	/* We reached the maximum of SCSI disks we can boot from. We can quit detecting. */
573	break;
574	}
575	}
576	else if ( ((buffer[0] & 0xe0) == 0)
577	&& ((buffer[0] & 0x1f) == 0x05))
578	{
579	uint8_t cdcount;
580	uint8_t removable;
581
582	BX_INFO("SCSI %d-ID#%d: CD/DVD-ROM\n", devcount_scsi, i);
583
584	/* Calculate index into the generic device table. */
585	hd_index = devcount_scsi + BX_MAX_ATA_DEVICES;
586
587	removable = buffer[1] & 0x80 ? 1 : 0;
588
589	bios_dsk->scsidev[devcount_scsi].io_base = io_base;
590	bios_dsk->scsidev[devcount_scsi].target_id = i;
591	bios_dsk->devices[hd_index].type = DSK_TYPE_SCSI;
592	bios_dsk->devices[hd_index].device = DSK_DEVICE_CDROM;
593	bios_dsk->devices[hd_index].removable = removable;
594	bios_dsk->devices[hd_index].blksize = 2048;
595	bios_dsk->devices[hd_index].translation = GEO_TRANSLATION_NONE;
596
597	/* Store the ID of the device in the BIOS cdidmap. */
598	cdcount = bios_dsk->cdcount;
599	bios_dsk->cdidmap[cdcount] = devcount_scsi + BX_MAX_ATA_DEVICES;
600	cdcount++;
601	bios_dsk->cdcount = cdcount;
602
603	devcount_scsi++;
604	}
605	else
606	DBG_SCSI("%s: No supported device detected at %d\n", __func__, i);
607
608	bios_dsk->scsi_devcount = devcount_scsi;
609	}
610	}
611
612	void scsi_pci_init(uint16_t vendor_id, uint16_t device_id)
613	{
614	uint16_t bus_dev_fn;
615
616	bus_dev_fn = pci_find_device(vendor_id, device_id);
617	if (bus_dev_fn == -1) {
618	DBG_SCSI("%s: Adapter %x:%x not found, how come?!\n", __func__, vendor_id, device_id);
619	return;
620	}
621
622	DBG_SCSI("%s: Adapter %x:%x found at %x, enabling BM\n", __func__, vendor_id, device_id, bus_dev_fn);
623	/* Enable PCI memory, I/O, bus mastering access in command register. */
624	pci_write_config_word(bus_dev_fn >> 8, (uint8_t)bus_dev_fn, 4, 0x7);
625	}
626
627	/**
628	* Init the SCSI driver and detect attached disks.
629	*/
630	void BIOSCALL scsi_init(void)
631	{
632	uint8_t identifier;
633	bio_dsk_t __far *bios_dsk;
634
635	bios_dsk = read_word(0x0040, 0x000E) :> &EbdaData->bdisk;
636
637	bios_dsk->scsi_devcount = 0;
638
639	identifier = 0;
640
641	/* Detect the BusLogic adapter. */
642	outb(BUSLOGIC_BIOS_IO_PORT+VBSCSI_REGISTER_IDENTIFY, 0x55);
643	identifier = inb(BUSLOGIC_BIOS_IO_PORT+VBSCSI_REGISTER_IDENTIFY);
644
645	if (identifier == 0x55)
646	{
647	/* Detected - Enumerate attached devices. */
648	DBG_SCSI("%s: BusLogic SCSI adapter detected\n", __func__);
649	outb(BUSLOGIC_BIOS_IO_PORT+VBSCSI_REGISTER_RESET, 0);
650	scsi_enumerate_attached_devices(BUSLOGIC_BIOS_IO_PORT);
651	scsi_pci_init(0x104B, 0x1040);
652	}
653	else
654	{
655	DBG_SCSI("%s: BusLogic SCSI adapter not detected\n", __func__);
656	}
657
658	/* Detect the LSI Logic parallel SCSI adapter. */
659	outb(LSILOGIC_BIOS_IO_PORT+VBSCSI_REGISTER_IDENTIFY, 0x55);
660	identifier = inb(LSILOGIC_BIOS_IO_PORT+VBSCSI_REGISTER_IDENTIFY);
661
662	if (identifier == 0x55)
663	{
664	/* Detected - Enumerate attached devices. */
665	DBG_SCSI("%s: LSI Logic SCSI adapter detected\n", __func__);
666	outb(LSILOGIC_BIOS_IO_PORT+VBSCSI_REGISTER_RESET, 0);
667	scsi_enumerate_attached_devices(LSILOGIC_BIOS_IO_PORT);
668	scsi_pci_init(0x1000, 0x0030);
669	}
670	else
671	{
672	DBG_SCSI("%s: LSI Logic SCSI adapter not detected\n", __func__);
673	}
674
675	/* Detect the LSI Logic SAS adapter. */
676	outb(LSILOGIC_SAS_BIOS_IO_PORT+VBSCSI_REGISTER_IDENTIFY, 0x55);
677	identifier = inb(LSILOGIC_SAS_BIOS_IO_PORT+VBSCSI_REGISTER_IDENTIFY);
678
679	if (identifier == 0x55)
680	{
681	/* Detected - Enumerate attached devices. */
682	DBG_SCSI("%s: LSI Logic SAS adapter detected\n", __func__);
683	outb(LSILOGIC_SAS_BIOS_IO_PORT+VBSCSI_REGISTER_RESET, 0);
684	scsi_enumerate_attached_devices(LSILOGIC_SAS_BIOS_IO_PORT);
685	scsi_pci_init(0x1000, 0x0054);
686	}
687	else
688	{
689	DBG_SCSI("%s: LSI Logic SAS adapter not detected\n", __func__);
690	}
691	}

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source: vbox/trunk/src/VBox/Devices/PC/BIOS/scsi.c@ 81851

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