scsi.c@ 98103

Last change on this file since 98103 was 98103, checked in by vboxsync, 23 months ago
Copyright year updates by scm.
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1	/* $Id: scsi.c 98103 2023-01-17 14:15:46Z vboxsync $ */
2	/** @file
3	* SCSI host adapter driver to boot from SCSI disks
4	*/
5
6	/*
7	* Copyright (C) 2004-2023 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28	#include <stdint.h>
29	#include <string.h>
30	#include "biosint.h"
31	#include "inlines.h"
32	#include "pciutil.h"
33	#include "ebda.h"
34	#include "scsi.h"
35
36
37	#if DEBUG_SCSI
38	# define DBG_SCSI(...) BX_INFO(__VA_ARGS__)
39	#else
40	# define DBG_SCSI(...)
41	#endif
42
43	#define VBSCSI_MAX_DEVICES 16 /* Maximum number of devices a SCSI device currently supported. */
44
45	#define VBOX_SCSI_NO_HBA 0xffff
46
47	typedef int (* scsi_hba_init)(void __far *pvHba, uint8_t u8Bus, uint8_t u8DevFn);
48	typedef int (* scsi_hba_cmd_data_out)(void __far pvHba, uint8_t idTgt, uint8_t __far aCDB,
49	uint8_t cbCDB, uint8_t __far *buffer, uint32_t length);
50	typedef int (* scsi_hba_cmd_data_in)(void __far pvHba, uint8_t idTgt, uint8_t __far aCDB,
51	uint8_t cbCDB, uint8_t __far *buffer, uint32_t length);
52
53	typedef struct
54	{
55	uint16_t idPciVendor;
56	uint16_t idPciDevice;
57	scsi_hba_init init;
58	scsi_hba_cmd_data_out cmd_data_out;
59	scsi_hba_cmd_data_in cmd_data_in;
60	} scsi_hba_t;
61
62	/* Machinery to save/restore high bits of EAX. 32-bit port I/O needs to use
63	* EAX, but saving/restoring EAX around each port access would be inefficient.
64	* Instead, each externally callable routine must save the high bits before
65	* modifying them and restore the high bits before exiting.
66	*/
67
68	/* Note: Reading high EAX bits destroys them - must be restored later. */
69	uint16_t eax_hi_rd(void);
70	#pragma aux eax_hi_rd = \
71	".386" \
72	"shr eax, 16" \
73	value [ax] modify nomemory;
74
75	void eax_hi_wr(uint16_t);
76	#pragma aux eax_hi_wr = \
77	".386" \
78	"shl eax, 16" \
79	parm [ax] modify nomemory;
80
81	void inline high_bits_save(uint16_t __far *pu16EaxHi)
82	{
83	*pu16EaxHi = eax_hi_rd();
84	}
85
86	void inline high_bits_restore(uint16_t u16EaxHi)
87	{
88	eax_hi_wr(u16EaxHi);
89	}
90
91	/* Pointers to the HBA specific access routines. */
92	scsi_hba_t hbaacc[] =
93	{
94	{ 0x1000, 0x0030, lsilogic_scsi_init, lsilogic_scsi_cmd_data_out, lsilogic_scsi_cmd_data_in }, /* SPI */
95	{ 0x1000, 0x0054, lsilogic_scsi_init, lsilogic_scsi_cmd_data_out, lsilogic_scsi_cmd_data_in }, /* SAS */
96	{ 0x104b, 0x1040, buslogic_scsi_init, buslogic_scsi_cmd_data_out, buslogic_scsi_cmd_data_in },
97	#ifdef VBOX_WITH_VIRTIO_SCSI
98	{ 0x1af4, 0x1048, virtio_scsi_init, virtio_scsi_cmd_data_out, virtio_scsi_cmd_data_in }
99	#endif
100	};
101
102	/**
103	* Allocates 1K of conventional memory.
104	*/
105	static uint16_t scsi_hba_mem_alloc(void)
106	{
107	uint16_t base_mem_kb;
108	uint16_t hba_seg;
109
110	base_mem_kb = read_word(0x00, 0x0413);
111
112	DBG_SCSI("SCSI: %dK of base mem\n", base_mem_kb);
113
114	if (base_mem_kb == 0)
115	return 0;
116
117	base_mem_kb--; /* Allocate one block. */
118	hba_seg = (((uint32_t)base_mem_kb * 1024) >> 4); /* Calculate start segment. */
119
120	write_word(0x00, 0x0413, base_mem_kb);
121
122	return hba_seg;
123	}
124
125	/**
126	* Read sectors from an attached SCSI device.
127	*
128	* @returns status code.
129	* @param bios_dsk Pointer to disk request packet (in the
130	* EBDA).
131	*/
132	int scsi_read_sectors(bio_dsk_t __far *bios_dsk)
133	{
134	uint8_t rc;
135	cdb_rw16 cdb;
136	uint32_t count;
137	uint16_t hba_seg;
138	uint8_t idx_hba;
139	uint8_t target_id;
140	uint8_t device_id;
141	uint16_t eax_hi;
142
143	device_id = VBOX_GET_SCSI_DEVICE(bios_dsk->drqp.dev_id);
144	if (device_id > BX_MAX_SCSI_DEVICES)
145	BX_PANIC("%s: device_id out of range %d\n", __func__, device_id);
146
147	count = bios_dsk->drqp.nsect;
148
149	high_bits_save(&eax_hi);
150
151	/* Prepare a CDB. */
152	cdb.command = SCSI_READ_16;
153	cdb.lba = swap_64(bios_dsk->drqp.lba);
154	cdb.pad1 = 0;
155	cdb.nsect32 = swap_32(count);
156	cdb.pad2 = 0;
157
158
159	hba_seg = bios_dsk->scsidev[device_id].hba_seg;
160	idx_hba = bios_dsk->scsidev[device_id].idx_hba;
161	target_id = bios_dsk->scsidev[device_id].target_id;
162
163	DBG_SCSI("%s: reading %u sectors, device %d, target %d\n", __func__,
164	count, device_id, bios_dsk->scsidev[device_id].target_id);
165
166	rc = hbaacc[idx_hba].cmd_data_in(hba_seg :> 0, target_id, (void __far *)&cdb, 16,
167	bios_dsk->drqp.buffer, (count * 512L));
168	if (!rc)
169	{
170	bios_dsk->drqp.trsfsectors = count;
171	bios_dsk->drqp.trsfbytes = count * 512L;
172	}
173	DBG_SCSI("%s: transferred %u sectors\n", __func__, bios_dsk->drqp.nsect);
174	high_bits_restore(eax_hi);
175
176	return rc;
177	}
178
179	/**
180	* Write sectors to an attached SCSI device.
181	*
182	* @returns status code.
183	* @param bios_dsk Pointer to disk request packet (in the
184	* EBDA).
185	*/
186	int scsi_write_sectors(bio_dsk_t __far *bios_dsk)
187	{
188	uint8_t rc;
189	cdb_rw16 cdb;
190	uint32_t count;
191	uint16_t hba_seg;
192	uint8_t idx_hba;
193	uint8_t target_id;
194	uint8_t device_id;
195	uint16_t eax_hi;
196
197	device_id = VBOX_GET_SCSI_DEVICE(bios_dsk->drqp.dev_id);
198	if (device_id > BX_MAX_SCSI_DEVICES)
199	BX_PANIC("%s: device_id out of range %d\n", __func__, device_id);
200
201	count = bios_dsk->drqp.nsect;
202
203	high_bits_save(&eax_hi);
204
205	/* Prepare a CDB. */
206	cdb.command = SCSI_WRITE_16;
207	cdb.lba = swap_64(bios_dsk->drqp.lba);
208	cdb.pad1 = 0;
209	cdb.nsect32 = swap_32(count);
210	cdb.pad2 = 0;
211
212	hba_seg = bios_dsk->scsidev[device_id].hba_seg;
213	idx_hba = bios_dsk->scsidev[device_id].idx_hba;
214	target_id = bios_dsk->scsidev[device_id].target_id;
215
216	DBG_SCSI("%s: writing %u sectors, device %d, target %d\n", __func__,
217	count, device_id, bios_dsk->scsidev[device_id].target_id);
218
219	rc = hbaacc[idx_hba].cmd_data_out(hba_seg :> 0, target_id, (void __far *)&cdb, 16,
220	bios_dsk->drqp.buffer, (count * 512L));
221	if (!rc)
222	{
223	bios_dsk->drqp.trsfsectors = count;
224	bios_dsk->drqp.trsfbytes = (count * 512L);
225	}
226	DBG_SCSI("%s: transferred %u sectors\n", __func__, bios_dsk->drqp.nsect);
227	high_bits_restore(eax_hi);
228
229	return rc;
230	}
231
232
233	/// @todo move
234	#define ATA_DATA_NO 0x00
235	#define ATA_DATA_IN 0x01
236	#define ATA_DATA_OUT 0x02
237
238	/**
239	* Perform a "packet style" read with supplied CDB.
240	*
241	* @returns status code.
242	* @param device_id ID of the device to access.
243	* @param cmdlen Length of the CDB.
244	* @param cmdbuf The CDB buffer.
245	* @param length How much to transfer.
246	* @param inout Read/Write direction indicator.
247	* @param buffer Data buffer to store the data from the device in.
248	*/
249	uint16_t scsi_cmd_packet(uint16_t device_id, uint8_t cmdlen, char __far *cmdbuf,
250	uint32_t length, uint8_t inout, char __far *buffer)
251	{
252	bio_dsk_t __far *bios_dsk = read_word(0x0040, 0x000E) :> &EbdaData->bdisk;
253	uint8_t rc;
254	uint8_t target_id;
255	uint16_t hba_seg;
256	uint8_t idx_hba;
257	uint16_t eax_hi;
258
259	/* Data out is currently not supported. */
260	if (inout == ATA_DATA_OUT) {
261	BX_INFO("%s: DATA_OUT not supported yet\n", __func__);
262	return 1;
263	}
264
265	/* Convert to SCSI specific device number. */
266	device_id = VBOX_GET_SCSI_DEVICE(device_id);
267
268	DBG_SCSI("%s: reading %lu bytes, device %d, target %d\n", __func__,
269	length, device_id, bios_dsk->scsidev[device_id].target_id);
270	DBG_SCSI("%s: reading %u %u-byte sectors\n", __func__,
271	bios_dsk->drqp.nsect, bios_dsk->drqp.sect_sz);
272
273	high_bits_save(&eax_hi);
274	hba_seg = bios_dsk->scsidev[device_id].hba_seg;
275	idx_hba = bios_dsk->scsidev[device_id].idx_hba;
276	target_id = bios_dsk->scsidev[device_id].target_id;
277
278	bios_dsk->drqp.lba = length << 8; /// @todo xfer length limit
279	bios_dsk->drqp.buffer = buffer;
280	bios_dsk->drqp.nsect = length / bios_dsk->drqp.sect_sz;
281
282	DBG_SCSI("%s: reading %u bytes, device %d, target %d\n", __func__,
283	length, device_id, bios_dsk->scsidev[device_id].target_id);
284
285	rc = hbaacc[idx_hba].cmd_data_in(hba_seg :> 0, target_id, (void __far *)cmdbuf, cmdlen,
286	bios_dsk->drqp.buffer, length);
287	if (!rc)
288	bios_dsk->drqp.trsfbytes = length;
289
290	DBG_SCSI("%s: transferred %u bytes\n", __func__, length);
291	high_bits_restore(eax_hi);
292
293	return rc;
294	}
295
296	/**
297	* Enumerate attached devices.
298	*
299	* @returns nothing.
300	* @param hba_seg Segement of the HBA controller block.
301	* @param idx_hba The HBA driver index used for accessing the enumerated devices.
302	*/
303	static void scsi_enumerate_attached_devices(uint16_t hba_seg, uint8_t idx_hba)
304	{
305	int i;
306	uint8_t buffer[0x0200];
307	bio_dsk_t __far *bios_dsk;
308
309	bios_dsk = read_word(0x0040, 0x000E) :> &EbdaData->bdisk;
310
311	/* Go through target devices. */
312	for (i = 0; i < VBSCSI_MAX_DEVICES; i++)
313	{
314	uint8_t rc;
315	uint8_t aCDB[16];
316	uint8_t hd_index, devcount_scsi;
317
318	aCDB[0] = SCSI_INQUIRY;
319	aCDB[1] = 0;
320	aCDB[2] = 0;
321	aCDB[3] = 0;
322	aCDB[4] = 5; /* Allocation length. */
323	aCDB[5] = 0;
324
325	rc = hbaacc[idx_hba].cmd_data_in(hba_seg :> 0, i, aCDB, 6, buffer, 5);
326	if (rc != 0)
327	{
328	DBG_SCSI("%s: SCSI_INQUIRY failed\n", __func__); /* Not a fatal error if the device doesn't exist. */
329	continue;
330	}
331
332	devcount_scsi = bios_dsk->scsi_devcount;
333
334	/* Check the attached device. */
335	if ( ((buffer[0] & 0xe0) == 0)
336	&& ((buffer[0] & 0x1f) == 0x00))
337	{
338	DBG_SCSI("%s: Disk detected at %d\n", __func__, i);
339
340	/* We add the disk only if the maximum is not reached yet. */
341	if (devcount_scsi < BX_MAX_SCSI_DEVICES)
342	{
343	uint64_t sectors, t;
344	uint32_t sector_size, cylinders;
345	uint16_t heads, sectors_per_track;
346	uint8_t hdcount;
347	uint8_t cmos_base;
348
349	/* Issue a read capacity command now. */
350	_fmemset(aCDB, 0, sizeof(aCDB));
351	aCDB[0] = SCSI_SERVICE_ACT;
352	aCDB[1] = SCSI_READ_CAP_16;
353	aCDB[13] = 32; /* Allocation length. */
354
355	rc = hbaacc[idx_hba].cmd_data_in(hba_seg :> 0, i, aCDB, 16, buffer, 32);
356	if (rc != 0)
357	BX_PANIC("%s: SCSI_READ_CAPACITY failed\n", __func__);
358
359	/* The value returned is the last addressable LBA, not
360	* the size, which what "+ 1" is for.
361	*/
362	sectors = swap_64((uint64_t )buffer) + 1;
363
364	sector_size = ((uint32_t)buffer[8] << 24)
365	\| ((uint32_t)buffer[9] << 16)
366	\| ((uint32_t)buffer[10] << 8)
367	\| ((uint32_t)buffer[11]);
368
369	/* We only support the disk if sector size is 512 bytes. */
370	if (sector_size != 512)
371	{
372	/* Leave a log entry. */
373	BX_INFO("Disk %d has an unsupported sector size of %u\n", i, sector_size);
374	continue;
375	}
376
377	/* Get logical CHS geometry. */
378	switch (devcount_scsi)
379	{
380	case 0:
381	cmos_base = 0x90;
382	break;
383	case 1:
384	cmos_base = 0x98;
385	break;
386	case 2:
387	cmos_base = 0xA0;
388	break;
389	case 3:
390	cmos_base = 0xA8;
391	break;
392	default:
393	cmos_base = 0;
394	}
395
396	if (cmos_base && inb_cmos(cmos_base + 7))
397	{
398	/* If provided, grab the logical geometry from CMOS. */
399	cylinders = get_cmos_word(cmos_base /, cmos_base + 1/);
400	heads = inb_cmos(cmos_base + 2);
401	sectors_per_track = inb_cmos(cmos_base + 7);
402	}
403	else
404	{
405	/* Calculate default logical geometry. NB: Very different
406	* from default ATA/SATA logical geometry!
407	*/
408	if (sectors >= (uint32_t)4 * 1024 * 1024)
409	{
410	heads = 255;
411	sectors_per_track = 63;
412	/* Approximate x / (255 * 63) using shifts */
413	t = (sectors >> 6) + (sectors >> 12);
414	cylinders = (t >> 8) + (t >> 16);
415	}
416	else if (sectors >= (uint32_t)2 * 1024 * 1024)
417	{
418	heads = 128;
419	sectors_per_track = 32;
420	cylinders = sectors >> 12;
421	}
422	else
423	{
424	heads = 64;
425	sectors_per_track = 32;
426	cylinders = sectors >> 11;
427	}
428	}
429
430	/* Calculate index into the generic disk table. */
431	hd_index = devcount_scsi + BX_MAX_ATA_DEVICES;
432
433	bios_dsk->scsidev[devcount_scsi].hba_seg = hba_seg;
434	bios_dsk->scsidev[devcount_scsi].idx_hba = idx_hba;
435	bios_dsk->scsidev[devcount_scsi].target_id = i;
436	bios_dsk->devices[hd_index].type = DSK_TYPE_SCSI;
437	bios_dsk->devices[hd_index].device = DSK_DEVICE_HD;
438	bios_dsk->devices[hd_index].removable = 0;
439	bios_dsk->devices[hd_index].lock = 0;
440	bios_dsk->devices[hd_index].blksize = sector_size;
441	bios_dsk->devices[hd_index].translation = GEO_TRANSLATION_LBA;
442
443	/* Write LCHS/PCHS values. */
444	bios_dsk->devices[hd_index].lchs.heads = heads;
445	bios_dsk->devices[hd_index].lchs.spt = sectors_per_track;
446	bios_dsk->devices[hd_index].pchs.heads = heads;
447	bios_dsk->devices[hd_index].pchs.spt = sectors_per_track;
448
449	if (cylinders > 1024) {
450	bios_dsk->devices[hd_index].lchs.cylinders = 1024;
451	bios_dsk->devices[hd_index].pchs.cylinders = 1024;
452	} else {
453	bios_dsk->devices[hd_index].lchs.cylinders = (uint16_t)cylinders;
454	bios_dsk->devices[hd_index].pchs.cylinders = (uint16_t)cylinders;
455	}
456
457	BX_INFO("SCSI %d-ID#%d: LCHS=%lu/%u/%u 0x%llx sectors\n", devcount_scsi,
458	i, (uint32_t)cylinders, heads, sectors_per_track, sectors);
459
460	bios_dsk->devices[hd_index].sectors = sectors;
461
462	/* Store the id of the disk in the ata hdidmap. */
463	hdcount = bios_dsk->hdcount;
464	bios_dsk->hdidmap[hdcount] = devcount_scsi + BX_MAX_ATA_DEVICES;
465	hdcount++;
466	bios_dsk->hdcount = hdcount;
467
468	/* Update hdcount in the BDA. */
469	hdcount = read_byte(0x40, 0x75);
470	hdcount++;
471	write_byte(0x40, 0x75, hdcount);
472
473	devcount_scsi++;
474	}
475	else
476	{
477	/* We reached the maximum of SCSI disks we can boot from. We can quit detecting. */
478	break;
479	}
480	}
481	else if ( ((buffer[0] & 0xe0) == 0)
482	&& ((buffer[0] & 0x1f) == 0x05))
483	{
484	uint8_t cdcount;
485	uint8_t removable;
486
487	BX_INFO("SCSI %d-ID#%d: CD/DVD-ROM\n", devcount_scsi, i);
488
489	/* Calculate index into the generic device table. */
490	hd_index = devcount_scsi + BX_MAX_ATA_DEVICES;
491
492	removable = buffer[1] & 0x80 ? 1 : 0;
493
494	bios_dsk->scsidev[devcount_scsi].hba_seg = hba_seg;
495	bios_dsk->scsidev[devcount_scsi].idx_hba = idx_hba;
496	bios_dsk->scsidev[devcount_scsi].target_id = i;
497	bios_dsk->devices[hd_index].type = DSK_TYPE_SCSI;
498	bios_dsk->devices[hd_index].device = DSK_DEVICE_CDROM;
499	bios_dsk->devices[hd_index].removable = removable;
500	bios_dsk->devices[hd_index].blksize = 2048;
501	bios_dsk->devices[hd_index].translation = GEO_TRANSLATION_NONE;
502
503	/* Store the ID of the device in the BIOS cdidmap. */
504	cdcount = bios_dsk->cdcount;
505	bios_dsk->cdidmap[cdcount] = devcount_scsi + BX_MAX_ATA_DEVICES;
506	cdcount++;
507	bios_dsk->cdcount = cdcount;
508
509	devcount_scsi++;
510	}
511	else
512	DBG_SCSI("%s: No supported device detected at %d\n", __func__, i);
513
514	bios_dsk->scsi_devcount = devcount_scsi;
515	}
516	}
517
518	/**
519	* Init the SCSI driver and detect attached disks.
520	*/
521	void BIOSCALL scsi_init(void)
522	{
523	int i;
524	bio_dsk_t __far *bios_dsk;
525
526	bios_dsk = read_word(0x0040, 0x000E) :> &EbdaData->bdisk;
527	bios_dsk->scsi_devcount = 0;
528
529	/* Walk the supported drivers and try to detect the HBA. */
530	for (i = 0; i < sizeof(hbaacc)/sizeof(hbaacc[0]); i++)
531	{
532	uint16_t busdevfn = pci_find_device(hbaacc[i].idPciVendor, hbaacc[i].idPciDevice);
533	if (busdevfn != VBOX_SCSI_NO_HBA)
534	{
535	int rc;
536	uint8_t u8Bus, u8DevFn;
537	uint16_t hba_seg = scsi_hba_mem_alloc();
538	if (hba_seg == 0) /* No point in trying the rest if we are out of memory. */
539	break;
540
541	u8Bus = (busdevfn & 0xff00) >> 8;
542	u8DevFn = busdevfn & 0x00ff;
543
544	DBG_SCSI("SCSI HBA at Bus %u DevFn 0x%x (raw 0x%x)\n", u8Bus, u8DevFn, busdevfn);
545	rc = hbaacc[i].init(hba_seg :> 0, u8Bus, u8DevFn);
546	if (!rc)
547	scsi_enumerate_attached_devices(hba_seg, i);
548	/** @todo Free memory on error. */
549	}
550	}
551	}

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source: vbox/trunk/src/VBox/Devices/PC/BIOS/scsi.c@ 98103

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