scsi.c@ 91881

Last change on this file since 91881 was 89364, checked in by vboxsync, 4 years ago
Devices/PC/BIOS: Remove the skip_b,skip_a mechanism as it is unused now making the device drivers lss complex, bugref:4841
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 18.4 KB

Line
1	/* $Id: scsi.c 89364 2021-05-28 15:44:38Z vboxsync $ */
2	/** @file
3	* SCSI host adapter driver to boot from SCSI disks
4	*/
5
6	/*
7	* Copyright (C) 2004-2020 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_MAX_DEVICES 16 /* Maximum number of devices a SCSI device currently supported. */
34
35	#define VBOX_SCSI_NO_HBA 0xffff
36
37	typedef int (* scsi_hba_init)(void __far *pvHba, uint8_t u8Bus, uint8_t u8DevFn);
38	typedef int (* scsi_hba_cmd_data_out)(void __far pvHba, uint8_t idTgt, uint8_t __far aCDB,
39	uint8_t cbCDB, uint8_t __far *buffer, uint32_t length);
40	typedef int (* scsi_hba_cmd_data_in)(void __far pvHba, uint8_t idTgt, uint8_t __far aCDB,
41	uint8_t cbCDB, uint8_t __far *buffer, uint32_t length);
42
43	typedef struct
44	{
45	uint16_t idPciVendor;
46	uint16_t idPciDevice;
47	scsi_hba_init init;
48	scsi_hba_cmd_data_out cmd_data_out;
49	scsi_hba_cmd_data_in cmd_data_in;
50	} scsi_hba_t;
51
52	/* Machinery to save/restore high bits of EAX. 32-bit port I/O needs to use
53	* EAX, but saving/restoring EAX around each port access would be inefficient.
54	* Instead, each externally callable routine must save the high bits before
55	* modifying them and restore the high bits before exiting.
56	*/
57
58	/* Note: Reading high EAX bits destroys them - must be restored later. */
59	uint16_t eax_hi_rd(void);
60	#pragma aux eax_hi_rd = \
61	".386" \
62	"shr eax, 16" \
63	value [ax] modify nomemory;
64
65	void eax_hi_wr(uint16_t);
66	#pragma aux eax_hi_wr = \
67	".386" \
68	"shl eax, 16" \
69	parm [ax] modify nomemory;
70
71	void inline high_bits_save(uint16_t __far *pu16EaxHi)
72	{
73	*pu16EaxHi = eax_hi_rd();
74	}
75
76	void inline high_bits_restore(uint16_t u16EaxHi)
77	{
78	eax_hi_wr(u16EaxHi);
79	}
80
81	/* Pointers to the HBA specific access routines. */
82	scsi_hba_t hbaacc[] =
83	{
84	{ 0x1000, 0x0030, lsilogic_scsi_init, lsilogic_scsi_cmd_data_out, lsilogic_scsi_cmd_data_in }, /* SPI */
85	{ 0x1000, 0x0054, lsilogic_scsi_init, lsilogic_scsi_cmd_data_out, lsilogic_scsi_cmd_data_in }, /* SAS */
86	{ 0x104b, 0x1040, buslogic_scsi_init, buslogic_scsi_cmd_data_out, buslogic_scsi_cmd_data_in },
87	#ifdef VBOX_WITH_VIRTIO_SCSI
88	{ 0x1af4, 0x1048, virtio_scsi_init, virtio_scsi_cmd_data_out, virtio_scsi_cmd_data_in }
89	#endif
90	};
91
92	/**
93	* Allocates 1K of conventional memory.
94	*/
95	static uint16_t scsi_hba_mem_alloc(void)
96	{
97	uint16_t base_mem_kb;
98	uint16_t hba_seg;
99
100	base_mem_kb = read_word(0x00, 0x0413);
101
102	DBG_SCSI("SCSI: %dK of base mem\n", base_mem_kb);
103
104	if (base_mem_kb == 0)
105	return 0;
106
107	base_mem_kb--; /* Allocate one block. */
108	hba_seg = (((uint32_t)base_mem_kb * 1024) >> 4); /* Calculate start segment. */
109
110	write_word(0x00, 0x0413, base_mem_kb);
111
112	return hba_seg;
113	}
114
115	/**
116	* Read sectors from an attached SCSI device.
117	*
118	* @returns status code.
119	* @param bios_dsk Pointer to disk request packet (in the
120	* EBDA).
121	*/
122	int scsi_read_sectors(bio_dsk_t __far *bios_dsk)
123	{
124	uint8_t rc;
125	cdb_rw16 cdb;
126	uint32_t count;
127	uint16_t hba_seg;
128	uint8_t idx_hba;
129	uint8_t target_id;
130	uint8_t device_id;
131	uint16_t eax_hi;
132
133	device_id = VBOX_GET_SCSI_DEVICE(bios_dsk->drqp.dev_id);
134	if (device_id > BX_MAX_SCSI_DEVICES)
135	BX_PANIC("%s: device_id out of range %d\n", __func__, device_id);
136
137	count = bios_dsk->drqp.nsect;
138
139	high_bits_save(&eax_hi);
140
141	/* Prepare a CDB. */
142	cdb.command = SCSI_READ_16;
143	cdb.lba = swap_64(bios_dsk->drqp.lba);
144	cdb.pad1 = 0;
145	cdb.nsect32 = swap_32(count);
146	cdb.pad2 = 0;
147
148
149	hba_seg = bios_dsk->scsidev[device_id].hba_seg;
150	idx_hba = bios_dsk->scsidev[device_id].idx_hba;
151	target_id = bios_dsk->scsidev[device_id].target_id;
152
153	DBG_SCSI("%s: reading %u sectors, device %d, target %d\n", __func__,
154	count, device_id, bios_dsk->scsidev[device_id].target_id);
155
156	rc = hbaacc[idx_hba].cmd_data_in(hba_seg :> 0, target_id, (void __far *)&cdb, 16,
157	bios_dsk->drqp.buffer, (count * 512L));
158	if (!rc)
159	{
160	bios_dsk->drqp.trsfsectors = count;
161	bios_dsk->drqp.trsfbytes = count * 512L;
162	}
163	DBG_SCSI("%s: transferred %u sectors\n", __func__, bios_dsk->drqp.nsect);
164	high_bits_restore(eax_hi);
165
166	return rc;
167	}
168
169	/**
170	* Write sectors to an attached SCSI device.
171	*
172	* @returns status code.
173	* @param bios_dsk Pointer to disk request packet (in the
174	* EBDA).
175	*/
176	int scsi_write_sectors(bio_dsk_t __far *bios_dsk)
177	{
178	uint8_t rc;
179	cdb_rw16 cdb;
180	uint32_t count;
181	uint16_t hba_seg;
182	uint8_t idx_hba;
183	uint8_t target_id;
184	uint8_t device_id;
185	uint16_t eax_hi;
186
187	device_id = VBOX_GET_SCSI_DEVICE(bios_dsk->drqp.dev_id);
188	if (device_id > BX_MAX_SCSI_DEVICES)
189	BX_PANIC("%s: device_id out of range %d\n", __func__, device_id);
190
191	count = bios_dsk->drqp.nsect;
192
193	high_bits_save(&eax_hi);
194
195	/* Prepare a CDB. */
196	cdb.command = SCSI_WRITE_16;
197	cdb.lba = swap_64(bios_dsk->drqp.lba);
198	cdb.pad1 = 0;
199	cdb.nsect32 = swap_32(count);
200	cdb.pad2 = 0;
201
202	hba_seg = bios_dsk->scsidev[device_id].hba_seg;
203	idx_hba = bios_dsk->scsidev[device_id].idx_hba;
204	target_id = bios_dsk->scsidev[device_id].target_id;
205
206	DBG_SCSI("%s: writing %u sectors, device %d, target %d\n", __func__,
207	count, device_id, bios_dsk->scsidev[device_id].target_id);
208
209	rc = hbaacc[idx_hba].cmd_data_out(hba_seg :> 0, target_id, (void __far *)&cdb, 16,
210	bios_dsk->drqp.buffer, (count * 512L));
211	if (!rc)
212	{
213	bios_dsk->drqp.trsfsectors = count;
214	bios_dsk->drqp.trsfbytes = (count * 512L);
215	}
216	DBG_SCSI("%s: transferred %u sectors\n", __func__, bios_dsk->drqp.nsect);
217	high_bits_restore(eax_hi);
218
219	return rc;
220	}
221
222
223	/// @todo move
224	#define ATA_DATA_NO 0x00
225	#define ATA_DATA_IN 0x01
226	#define ATA_DATA_OUT 0x02
227
228	/**
229	* Perform a "packet style" read with supplied CDB.
230	*
231	* @returns status code.
232	* @param device_id ID of the device to access.
233	* @param cmdlen Length of the CDB.
234	* @param cmdbuf The CDB buffer.
235	* @param length How much to transfer.
236	* @param inout Read/Write direction indicator.
237	* @param buffer Data buffer to store the data from the device in.
238	*/
239	uint16_t scsi_cmd_packet(uint16_t device_id, uint8_t cmdlen, char __far *cmdbuf,
240	uint32_t length, uint8_t inout, char __far *buffer)
241	{
242	bio_dsk_t __far *bios_dsk = read_word(0x0040, 0x000E) :> &EbdaData->bdisk;
243	uint8_t rc;
244	uint8_t target_id;
245	uint16_t hba_seg;
246	uint8_t idx_hba;
247	uint16_t eax_hi;
248
249	/* Data out is currently not supported. */
250	if (inout == ATA_DATA_OUT) {
251	BX_INFO("%s: DATA_OUT not supported yet\n", __func__);
252	return 1;
253	}
254
255	/* Convert to SCSI specific device number. */
256	device_id = VBOX_GET_SCSI_DEVICE(device_id);
257
258	DBG_SCSI("%s: reading %lu bytes, device %d, target %d\n", __func__,
259	length, device_id, bios_dsk->scsidev[device_id].target_id);
260	DBG_SCSI("%s: reading %u %u-byte sectors\n", __func__,
261	bios_dsk->drqp.nsect, bios_dsk->drqp.sect_sz);
262
263	high_bits_save(&eax_hi);
264	hba_seg = bios_dsk->scsidev[device_id].hba_seg;
265	idx_hba = bios_dsk->scsidev[device_id].idx_hba;
266	target_id = bios_dsk->scsidev[device_id].target_id;
267
268	bios_dsk->drqp.lba = length << 8; /// @todo xfer length limit
269	bios_dsk->drqp.buffer = buffer;
270	bios_dsk->drqp.nsect = length / bios_dsk->drqp.sect_sz;
271
272	DBG_SCSI("%s: reading %u bytes, device %d, target %d\n", __func__,
273	length, device_id, bios_dsk->scsidev[device_id].target_id);
274
275	rc = hbaacc[idx_hba].cmd_data_in(hba_seg :> 0, target_id, (void __far *)cmdbuf, cmdlen,
276	bios_dsk->drqp.buffer, length);
277	if (!rc)
278	bios_dsk->drqp.trsfbytes = length;
279
280	DBG_SCSI("%s: transferred %u bytes\n", __func__, length);
281	high_bits_restore(eax_hi);
282
283	return rc;
284	}
285
286	/**
287	* Enumerate attached devices.
288	*
289	* @returns nothing.
290	* @param hba_seg Segement of the HBA controller block.
291	* @param idx_hba The HBA driver index used for accessing the enumerated devices.
292	*/
293	static void scsi_enumerate_attached_devices(uint16_t hba_seg, uint8_t idx_hba)
294	{
295	int i;
296	uint8_t buffer[0x0200];
297	bio_dsk_t __far *bios_dsk;
298
299	bios_dsk = read_word(0x0040, 0x000E) :> &EbdaData->bdisk;
300
301	/* Go through target devices. */
302	for (i = 0; i < VBSCSI_MAX_DEVICES; i++)
303	{
304	uint8_t rc;
305	uint8_t aCDB[16];
306	uint8_t hd_index, devcount_scsi;
307
308	aCDB[0] = SCSI_INQUIRY;
309	aCDB[1] = 0;
310	aCDB[2] = 0;
311	aCDB[3] = 0;
312	aCDB[4] = 5; /* Allocation length. */
313	aCDB[5] = 0;
314
315	rc = hbaacc[idx_hba].cmd_data_in(hba_seg :> 0, i, aCDB, 6, buffer, 5);
316	if (rc != 0)
317	{
318	DBG_SCSI("%s: SCSI_INQUIRY failed\n", __func__); /* Not a fatal error if the device doesn't exist. */
319	continue;
320	}
321
322	devcount_scsi = bios_dsk->scsi_devcount;
323
324	/* Check the attached device. */
325	if ( ((buffer[0] & 0xe0) == 0)
326	&& ((buffer[0] & 0x1f) == 0x00))
327	{
328	DBG_SCSI("%s: Disk detected at %d\n", __func__, i);
329
330	/* We add the disk only if the maximum is not reached yet. */
331	if (devcount_scsi < BX_MAX_SCSI_DEVICES)
332	{
333	uint64_t sectors, t;
334	uint32_t sector_size, cylinders;
335	uint16_t heads, sectors_per_track;
336	uint8_t hdcount;
337	uint8_t cmos_base;
338
339	/* Issue a read capacity command now. */
340	_fmemset(aCDB, 0, sizeof(aCDB));
341	aCDB[0] = SCSI_SERVICE_ACT;
342	aCDB[1] = SCSI_READ_CAP_16;
343	aCDB[13] = 32; /* Allocation length. */
344
345	rc = hbaacc[idx_hba].cmd_data_in(hba_seg :> 0, i, aCDB, 16, buffer, 32);
346	if (rc != 0)
347	BX_PANIC("%s: SCSI_READ_CAPACITY failed\n", __func__);
348
349	/* The value returned is the last addressable LBA, not
350	* the size, which what "+ 1" is for.
351	*/
352	sectors = swap_64((uint64_t )buffer) + 1;
353
354	sector_size = ((uint32_t)buffer[8] << 24)
355	\| ((uint32_t)buffer[9] << 16)
356	\| ((uint32_t)buffer[10] << 8)
357	\| ((uint32_t)buffer[11]);
358
359	/* We only support the disk if sector size is 512 bytes. */
360	if (sector_size != 512)
361	{
362	/* Leave a log entry. */
363	BX_INFO("Disk %d has an unsupported sector size of %u\n", i, sector_size);
364	continue;
365	}
366
367	/* Get logical CHS geometry. */
368	switch (devcount_scsi)
369	{
370	case 0:
371	cmos_base = 0x90;
372	break;
373	case 1:
374	cmos_base = 0x98;
375	break;
376	case 2:
377	cmos_base = 0xA0;
378	break;
379	case 3:
380	cmos_base = 0xA8;
381	break;
382	default:
383	cmos_base = 0;
384	}
385
386	if (cmos_base && inb_cmos(cmos_base + 7))
387	{
388	/* If provided, grab the logical geometry from CMOS. */
389	cylinders = inb_cmos(cmos_base + 0) + (inb_cmos(cmos_base + 1) << 8);
390	heads = inb_cmos(cmos_base + 2);
391	sectors_per_track = inb_cmos(cmos_base + 7);
392	}
393	else
394	{
395	/* Calculate default logical geometry. NB: Very different
396	* from default ATA/SATA logical geometry!
397	*/
398	if (sectors >= (uint32_t)4 * 1024 * 1024)
399	{
400	heads = 255;
401	sectors_per_track = 63;
402	/* Approximate x / (255 * 63) using shifts */
403	t = (sectors >> 6) + (sectors >> 12);
404	cylinders = (t >> 8) + (t >> 16);
405	}
406	else if (sectors >= (uint32_t)2 * 1024 * 1024)
407	{
408	heads = 128;
409	sectors_per_track = 32;
410	cylinders = sectors >> 12;
411	}
412	else
413	{
414	heads = 64;
415	sectors_per_track = 32;
416	cylinders = sectors >> 11;
417	}
418	}
419
420	/* Calculate index into the generic disk table. */
421	hd_index = devcount_scsi + BX_MAX_ATA_DEVICES;
422
423	bios_dsk->scsidev[devcount_scsi].hba_seg = hba_seg;
424	bios_dsk->scsidev[devcount_scsi].idx_hba = idx_hba;
425	bios_dsk->scsidev[devcount_scsi].target_id = i;
426	bios_dsk->devices[hd_index].type = DSK_TYPE_SCSI;
427	bios_dsk->devices[hd_index].device = DSK_DEVICE_HD;
428	bios_dsk->devices[hd_index].removable = 0;
429	bios_dsk->devices[hd_index].lock = 0;
430	bios_dsk->devices[hd_index].blksize = sector_size;
431	bios_dsk->devices[hd_index].translation = GEO_TRANSLATION_LBA;
432
433	/* Write LCHS/PCHS values. */
434	bios_dsk->devices[hd_index].lchs.heads = heads;
435	bios_dsk->devices[hd_index].lchs.spt = sectors_per_track;
436	bios_dsk->devices[hd_index].pchs.heads = heads;
437	bios_dsk->devices[hd_index].pchs.spt = sectors_per_track;
438
439	if (cylinders > 1024) {
440	bios_dsk->devices[hd_index].lchs.cylinders = 1024;
441	bios_dsk->devices[hd_index].pchs.cylinders = 1024;
442	} else {
443	bios_dsk->devices[hd_index].lchs.cylinders = (uint16_t)cylinders;
444	bios_dsk->devices[hd_index].pchs.cylinders = (uint16_t)cylinders;
445	}
446
447	BX_INFO("SCSI %d-ID#%d: LCHS=%lu/%u/%u 0x%llx sectors\n", devcount_scsi,
448	i, (uint32_t)cylinders, heads, sectors_per_track, sectors);
449
450	bios_dsk->devices[hd_index].sectors = sectors;
451
452	/* Store the id of the disk in the ata hdidmap. */
453	hdcount = bios_dsk->hdcount;
454	bios_dsk->hdidmap[hdcount] = devcount_scsi + BX_MAX_ATA_DEVICES;
455	hdcount++;
456	bios_dsk->hdcount = hdcount;
457
458	/* Update hdcount in the BDA. */
459	hdcount = read_byte(0x40, 0x75);
460	hdcount++;
461	write_byte(0x40, 0x75, hdcount);
462
463	devcount_scsi++;
464	}
465	else
466	{
467	/* We reached the maximum of SCSI disks we can boot from. We can quit detecting. */
468	break;
469	}
470	}
471	else if ( ((buffer[0] & 0xe0) == 0)
472	&& ((buffer[0] & 0x1f) == 0x05))
473	{
474	uint8_t cdcount;
475	uint8_t removable;
476
477	BX_INFO("SCSI %d-ID#%d: CD/DVD-ROM\n", devcount_scsi, i);
478
479	/* Calculate index into the generic device table. */
480	hd_index = devcount_scsi + BX_MAX_ATA_DEVICES;
481
482	removable = buffer[1] & 0x80 ? 1 : 0;
483
484	bios_dsk->scsidev[devcount_scsi].hba_seg = hba_seg;
485	bios_dsk->scsidev[devcount_scsi].idx_hba = idx_hba;
486	bios_dsk->scsidev[devcount_scsi].target_id = i;
487	bios_dsk->devices[hd_index].type = DSK_TYPE_SCSI;
488	bios_dsk->devices[hd_index].device = DSK_DEVICE_CDROM;
489	bios_dsk->devices[hd_index].removable = removable;
490	bios_dsk->devices[hd_index].blksize = 2048;
491	bios_dsk->devices[hd_index].translation = GEO_TRANSLATION_NONE;
492
493	/* Store the ID of the device in the BIOS cdidmap. */
494	cdcount = bios_dsk->cdcount;
495	bios_dsk->cdidmap[cdcount] = devcount_scsi + BX_MAX_ATA_DEVICES;
496	cdcount++;
497	bios_dsk->cdcount = cdcount;
498
499	devcount_scsi++;
500	}
501	else
502	DBG_SCSI("%s: No supported device detected at %d\n", __func__, i);
503
504	bios_dsk->scsi_devcount = devcount_scsi;
505	}
506	}
507
508	/**
509	* Init the SCSI driver and detect attached disks.
510	*/
511	void BIOSCALL scsi_init(void)
512	{
513	int i;
514	bio_dsk_t __far *bios_dsk;
515
516	bios_dsk = read_word(0x0040, 0x000E) :> &EbdaData->bdisk;
517	bios_dsk->scsi_devcount = 0;
518
519	/* Walk the supported drivers and try to detect the HBA. */
520	for (i = 0; i < sizeof(hbaacc)/sizeof(hbaacc[0]); i++)
521	{
522	uint16_t busdevfn = pci_find_device(hbaacc[i].idPciVendor, hbaacc[i].idPciDevice);
523	if (busdevfn != VBOX_SCSI_NO_HBA)
524	{
525	int rc;
526	uint8_t u8Bus, u8DevFn;
527	uint16_t hba_seg = scsi_hba_mem_alloc();
528	if (hba_seg == 0) /* No point in trying the rest if we are out of memory. */
529	break;
530
531	u8Bus = (busdevfn & 0xff00) >> 8;
532	u8DevFn = busdevfn & 0x00ff;
533
534	DBG_SCSI("SCSI HBA at Bus %u DevFn 0x%x (raw 0x%x)\n", u8Bus, u8DevFn, busdevfn);
535	rc = hbaacc[i].init(hba_seg :> 0, u8Bus, u8DevFn);
536	if (!rc)
537	scsi_enumerate_attached_devices(hba_seg, i);
538	/** @todo Free memory on error. */
539	}
540	}
541	}

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source: vbox/trunk/src/VBox/Devices/PC/BIOS/scsi.c@ 91881

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