VirtualBox

source: vbox/trunk/src/VBox/Devices/PC/BIOS/ahci.c@ 56292

Last change on this file since 56292 was 56292, checked in by vboxsync, 10 years ago

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1/* $Id: ahci.c 56292 2015-06-09 14:20:46Z vboxsync $ */
2/** @file
3 * AHCI host adapter driver to boot from SATA disks.
4 */
5
6/*
7 * Copyright (C) 2011-2015 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 "ebda.h"
22#include "inlines.h"
23#include "pciutil.h"
24#include "vds.h"
25
26#if DEBUG_AHCI
27# define DBG_AHCI(...) BX_INFO(__VA_ARGS__)
28#else
29# define DBG_AHCI(...)
30#endif
31
32/* Number of S/G table entries in EDDS. */
33#define NUM_EDDS_SG 16
34
35
36/**
37 * AHCI PRDT structure.
38 */
39typedef struct
40{
41 uint32_t phys_addr;
42 uint32_t something;
43 uint32_t reserved;
44 uint32_t len;
45} ahci_prdt;
46
47/**
48 * SATA D2H FIS (Device to Host Frame Information Structure).
49 */
50typedef struct {
51 uint8_t fis_type; /* 34h */
52 uint8_t intr; /* Bit 6 indicates interrupt status. */
53 uint8_t status; /* Status register. */
54 uint8_t error; /* Error register. */
55 uint8_t sec_no; /* Sector number register. */
56 uint8_t cyl_lo; /* Cylinder low register. */
57 uint8_t cyl_hi; /* Cylinder high register. */
58 uint8_t dev_hd; /* Device/head register. */
59 uint8_t sec_no_exp; /* Expanded sector number register. */
60 uint8_t cyl_lo_exp; /* Expanded cylinder low register. */
61 uint8_t cyl_hi_exp; /* Expanded cylinder high register. */
62 uint8_t resvd0;
63 uint8_t sec_cn; /* Sector count register. */
64 uint8_t sec_cn_exp; /* Expanded sector count register. */
65 uint16_t resvd1;
66 uint32_t resvd2;
67} fis_d2h;
68
69ct_assert(sizeof(fis_d2h) == 20);
70
71/**
72 * AHCI controller data.
73 */
74typedef struct
75{
76 /** The AHCI command list as defined by chapter 4.2.2 of the Intel AHCI spec.
77 * Because the BIOS doesn't support NCQ only the first command header is defined
78 * to save memory. - Must be aligned on a 1K boundary.
79 */
80 uint32_t aCmdHdr[0x8];
81 /** Align the next structure on a 128 byte boundary. */
82 uint8_t abAlignment1[0x60];
83 /** The command table of one request as defined by chapter 4.2.3 of the Intel AHCI spec.
84 * Must be aligned on 128 byte boundary.
85 */
86 uint8_t abCmd[0x40];
87 /** The ATAPI command region.
88 * Located 40h bytes after the beginning of the CFIS (Command FIS).
89 */
90 uint8_t abAcmd[0x20];
91 /** Align the PRDT structure on a 128 byte boundary. */
92 uint8_t abAlignment2[0x20];
93 /** Physical Region Descriptor Table (PRDT) array. In other
94 * words, a scatter/gather descriptor list.
95 */
96 ahci_prdt aPrdt[16];
97 /** Memory for the received command FIS area as specified by chapter 4.2.1
98 * of the Intel AHCI spec. This area is normally 256 bytes big but to save memory
99 * only the first 96 bytes are used because it is assumed that the controller
100 * never writes to the UFIS or reserved area. - Must be aligned on a 256byte boundary.
101 */
102 uint8_t abFisRecv[0x60];
103 /** Base I/O port for the index/data register pair. */
104 uint16_t iobase;
105 /** Current port which uses the memory to communicate with the controller. */
106 uint8_t cur_port;
107 /** Current PRD index (for pre/post skip). */
108 uint8_t cur_prd;
109 /** Physical address of the sink buffer (for pre/post skip). */
110 uint32_t sink_buf_phys;
111 /** Saved high bits of EAX. */
112 uint16_t saved_eax_hi;
113 /** VDS EDDS DMA buffer descriptor structure. */
114 vds_edds edds;
115 vds_sg edds_more_sg[NUM_EDDS_SG - 1];
116} ahci_t;
117
118/* The AHCI specific data must fit into 1KB (statically allocated). */
119ct_assert(sizeof(ahci_t) <= 1024);
120
121/** PCI configuration fields. */
122#define PCI_CONFIG_CAP 0x34
123
124#define PCI_CAP_ID_SATACR 0x12
125#define VBOX_AHCI_NO_DEVICE 0xffff
126
127#define RT_BIT_32(bit) ((uint32_t)(1L << (bit)))
128
129/** Global register set. */
130#define AHCI_HBA_SIZE 0x100
131
132//@todo: what are the casts good for?
133#define AHCI_REG_CAP ((uint32_t)0x00)
134#define AHCI_REG_GHC ((uint32_t)0x04)
135# define AHCI_GHC_AE RT_BIT_32(31)
136# define AHCI_GHC_IR RT_BIT_32(1)
137# define AHCI_GHC_HR RT_BIT_32(0)
138#define AHCI_REG_IS ((uint32_t)0x08)
139#define AHCI_REG_PI ((uint32_t)0x0c)
140#define AHCI_REG_VS ((uint32_t)0x10)
141
142/** Per port register set. */
143#define AHCI_PORT_SIZE 0x80
144
145#define AHCI_REG_PORT_CLB 0x00
146#define AHCI_REG_PORT_CLBU 0x04
147#define AHCI_REG_PORT_FB 0x08
148#define AHCI_REG_PORT_FBU 0x0c
149#define AHCI_REG_PORT_IS 0x10
150# define AHCI_REG_PORT_IS_DHRS RT_BIT_32(0)
151# define AHCI_REG_PORT_IS_TFES RT_BIT_32(30)
152#define AHCI_REG_PORT_IE 0x14
153#define AHCI_REG_PORT_CMD 0x18
154# define AHCI_REG_PORT_CMD_ST RT_BIT_32(0)
155# define AHCI_REG_PORT_CMD_FRE RT_BIT_32(4)
156# define AHCI_REG_PORT_CMD_FR RT_BIT_32(14)
157# define AHCI_REG_PORT_CMD_CR RT_BIT_32(15)
158#define AHCI_REG_PORT_TFD 0x20
159#define AHCI_REG_PORT_SIG 0x24
160#define AHCI_REG_PORT_SSTS 0x28
161#define AHCI_REG_PORT_SCTL 0x2c
162#define AHCI_REG_PORT_SERR 0x30
163#define AHCI_REG_PORT_SACT 0x34
164#define AHCI_REG_PORT_CI 0x38
165
166/** Returns the absolute register offset from a given port and port register. */
167#define AHCI_PORT_REG(port, reg) (AHCI_HBA_SIZE + (port) * AHCI_PORT_SIZE + (reg))
168
169#define AHCI_REG_IDX 0
170#define AHCI_REG_DATA 4
171
172/** Writes the given value to a AHCI register. */
173#define AHCI_WRITE_REG(iobase, reg, val) \
174 outpd((iobase) + AHCI_REG_IDX, reg); \
175 outpd((iobase) + AHCI_REG_DATA, val)
176
177/** Reads from a AHCI register. */
178#define AHCI_READ_REG(iobase, reg, val) \
179 outpd((iobase) + AHCI_REG_IDX, reg); \
180 (val) = inpd((iobase) + AHCI_REG_DATA)
181
182/** Writes to the given port register. */
183#define VBOXAHCI_PORT_WRITE_REG(iobase, port, reg, val) \
184 AHCI_WRITE_REG((iobase), AHCI_PORT_REG((port), (reg)), val)
185
186/** Reads from the given port register. */
187#define VBOXAHCI_PORT_READ_REG(iobase, port, reg, val) \
188 AHCI_READ_REG((iobase), AHCI_PORT_REG((port), (reg)), val)
189
190#define ATA_CMD_IDENTIFY_DEVICE 0xEC
191#define ATA_CMD_IDENTIFY_PACKET 0xA1
192#define ATA_CMD_PACKET 0xA0
193#define AHCI_CMD_READ_DMA_EXT 0x25
194#define AHCI_CMD_WRITE_DMA_EXT 0x35
195
196
197/* Warning: Destroys high bits of EAX. */
198uint32_t inpd(uint16_t port);
199#pragma aux inpd = \
200 ".386" \
201 "in eax, dx" \
202 "mov dx, ax" \
203 "shr eax, 16" \
204 "xchg ax, dx" \
205 parm [dx] value [dx ax] modify nomemory;
206
207/* Warning: Destroys high bits of EAX. */
208void outpd(uint16_t port, uint32_t val);
209#pragma aux outpd = \
210 ".386" \
211 "xchg ax, cx" \
212 "shl eax, 16" \
213 "mov ax, cx" \
214 "out dx, eax" \
215 parm [dx] [cx ax] modify nomemory;
216
217
218/* Machinery to save/restore high bits of EAX. 32-bit port I/O needs to use
219 * EAX, but saving/restoring EAX around each port access would be inefficient.
220 * Instead, each externally callable routine must save the high bits before
221 * modifying them and restore the high bits before exiting.
222 */
223
224/* Note: Reading high EAX bits destroys them - *must* be restored later. */
225uint16_t eax_hi_rd(void);
226#pragma aux eax_hi_rd = \
227 ".386" \
228 "shr eax, 16" \
229 value [ax] modify nomemory;
230
231void eax_hi_wr(uint16_t);
232#pragma aux eax_hi_wr = \
233 ".386" \
234 "shl eax, 16" \
235 parm [ax] modify nomemory;
236
237void high_bits_save(ahci_t __far *ahci)
238{
239 ahci->saved_eax_hi = eax_hi_rd();
240}
241
242void high_bits_restore(ahci_t __far *ahci)
243{
244 eax_hi_wr(ahci->saved_eax_hi);
245}
246
247/**
248 * Sets a given set of bits in a register.
249 */
250static void ahci_ctrl_set_bits(uint16_t iobase, uint16_t reg, uint32_t mask)
251{
252 outpd(iobase + AHCI_REG_IDX, reg);
253 outpd(iobase + AHCI_REG_DATA, inpd(iobase + AHCI_REG_DATA) | mask);
254}
255
256/**
257 * Clears a given set of bits in a register.
258 */
259static void ahci_ctrl_clear_bits(uint16_t iobase, uint16_t reg, uint32_t mask)
260{
261 outpd(iobase + AHCI_REG_IDX, reg);
262 outpd(iobase + AHCI_REG_DATA, inpd(iobase + AHCI_REG_DATA) & ~mask);
263}
264
265/**
266 * Returns whether at least one of the bits in the given mask is set
267 * for a register.
268 */
269static uint8_t ahci_ctrl_is_bit_set(uint16_t iobase, uint16_t reg, uint32_t mask)
270{
271 outpd(iobase + AHCI_REG_IDX, reg);
272 return (inpd(iobase + AHCI_REG_DATA) & mask) != 0;
273}
274
275/**
276 * Extracts a range of bits from a register and shifts them
277 * to the right.
278 */
279static uint16_t ahci_ctrl_extract_bits(uint32_t val, uint32_t mask, uint8_t shift)
280{
281 return (val & mask) >> shift;
282}
283
284/**
285 * Converts a segment:offset pair into a 32bit physical address.
286 */
287static uint32_t ahci_addr_to_phys(void __far *ptr)
288{
289 return ((uint32_t)FP_SEG(ptr) << 4) + FP_OFF(ptr);
290}
291
292/**
293 * Issues a command to the SATA controller and waits for completion.
294 */
295static void ahci_port_cmd_sync(ahci_t __far *ahci, uint8_t val)
296{
297 uint16_t io_base;
298 uint8_t port;
299
300 port = ahci->cur_port;
301 io_base = ahci->iobase;
302
303 if (port != 0xff)
304 {
305 /* Prepare the command header. */
306 ahci->aCmdHdr[0] = ((uint32_t)ahci->cur_prd << 16) | RT_BIT_32(7) | val;
307 ahci->aCmdHdr[1] = 0;
308 ahci->aCmdHdr[2] = ahci_addr_to_phys(&ahci->abCmd[0]);
309
310 /* Enable Command and FIS receive engine. */
311 ahci_ctrl_set_bits(io_base, AHCI_PORT_REG(port, AHCI_REG_PORT_CMD),
312 AHCI_REG_PORT_CMD_FRE | AHCI_REG_PORT_CMD_ST);
313
314 /* Queue command. */
315 VBOXAHCI_PORT_WRITE_REG(io_base, port, AHCI_REG_PORT_CI, 0x1);
316
317 /* Wait for a D2H FIS. */
318 DBG_AHCI("AHCI: Waiting for D2H FIS\n");
319 while (ahci_ctrl_is_bit_set(io_base, AHCI_PORT_REG(port, AHCI_REG_PORT_IS),
320 AHCI_REG_PORT_IS_DHRS | AHCI_REG_PORT_IS_TFES) == 0)
321 {
322 // This is where we'd need some kind of a yield functionality...
323 }
324
325 ahci_ctrl_set_bits(io_base, AHCI_PORT_REG(port, AHCI_REG_PORT_IS),
326 AHCI_REG_PORT_IS_DHRS); /* Acknowledge received D2H FIS. */
327
328 /* Disable command engine. */
329 ahci_ctrl_clear_bits(io_base, AHCI_PORT_REG(port, AHCI_REG_PORT_CMD),
330 AHCI_REG_PORT_CMD_ST);
331 /* Caller must examine status. */
332 }
333 else
334 DBG_AHCI("AHCI: Invalid port given\n");
335}
336
337/**
338 * Issue command to device.
339 */
340static uint16_t ahci_cmd_data(bio_dsk_t __far *bios_dsk, uint8_t cmd)
341{
342 ahci_t __far *ahci = bios_dsk->ahci_seg :> 0;
343 uint16_t n_sect = bios_dsk->drqp.nsect;
344 uint16_t sectsz = bios_dsk->drqp.sect_sz;
345 uint16_t prdt_idx;
346 fis_d2h __far *d2h;
347
348 _fmemset(&ahci->abCmd[0], 0, sizeof(ahci->abCmd));
349
350 /* Prepare the FIS. */
351 ahci->abCmd[0] = 0x27; /* FIS type H2D. */
352 ahci->abCmd[1] = 1 << 7; /* Command update. */
353 ahci->abCmd[2] = cmd;
354 ahci->abCmd[3] = 0;
355
356 ahci->abCmd[4] = bios_dsk->drqp.lba & 0xff;
357 ahci->abCmd[5] = (bios_dsk->drqp.lba >> 8) & 0xff;
358 ahci->abCmd[6] = (bios_dsk->drqp.lba >> 16) & 0xff;
359 ahci->abCmd[7] = RT_BIT_32(6); /* LBA access. */
360
361 ahci->abCmd[8] = (bios_dsk->drqp.lba >> 24) & 0xff;
362 ahci->abCmd[9] = 0;
363 ahci->abCmd[10] = 0;
364 ahci->abCmd[11] = 0;
365
366 ahci->abCmd[12] = (uint8_t)(n_sect & 0xff);
367 ahci->abCmd[13] = (uint8_t)((n_sect >> 8) & 0xff);
368
369 /* Lock memory needed for DMA. */
370 ahci->edds.num_avail = NUM_EDDS_SG;
371 DBG_AHCI("AHCI: S/G list for %lu bytes (skip %u)\n",
372 (uint32_t)n_sect * sectsz, bios_dsk->drqp.skip_a);
373 vds_build_sg_list(&ahci->edds, bios_dsk->drqp.buffer, (uint32_t)n_sect * sectsz);
374
375 prdt_idx = ahci->cur_prd;
376
377 /* Set up the PRDT. */
378 ahci->aPrdt[prdt_idx].len = ahci->edds.u.sg[0].size - 1;
379 ahci->aPrdt[prdt_idx].phys_addr = ahci->edds.u.sg[0].phys_addr;
380 ++prdt_idx;
381
382 if (bios_dsk->drqp.skip_a) {
383 ahci->aPrdt[prdt_idx].len = bios_dsk->drqp.skip_a - 1;
384 ahci->aPrdt[prdt_idx].phys_addr = ahci->sink_buf_phys;
385 ++prdt_idx;
386 }
387
388 ahci->cur_prd = prdt_idx;
389
390#ifdef DEBUG_AHCI
391 for (prdt_idx = 0; prdt_idx < ahci->cur_prd; ++prdt_idx) {
392 DBG_AHCI("S/G entry %u: %5lu bytes @ %08lX\n", prdt_idx,
393 ahci->aPrdt[prdt_idx].len + 1, ahci->aPrdt[prdt_idx].phys_addr);
394 }
395#endif
396
397 /* Build variable part of first command DWORD (reuses 'cmd'). */
398 if (cmd == AHCI_CMD_WRITE_DMA_EXT)
399 cmd = RT_BIT_32(6); /* Indicate a write to device. */
400 else if (cmd == ATA_CMD_PACKET) {
401 cmd |= RT_BIT_32(5); /* Indicate ATAPI command. */
402 ahci->abCmd[3] |= 1; /* DMA transfers. */
403 } else
404 cmd = 0;
405
406 cmd |= 5; /* Five DWORDs. */
407
408 ahci_port_cmd_sync(ahci, cmd);
409
410 /* Examine operation status. */
411 d2h = (void __far *)&ahci->abFisRecv[0x40];
412 DBG_AHCI("AHCI: ERR=%02x, STAT=%02x, SCNT=%02x\n", d2h->error, d2h->status, d2h->sec_cn);
413
414 /* Unlock the buffer again. */
415 vds_free_sg_list(&ahci->edds);
416 return d2h->error ? 4 : 0;
417}
418
419/**
420 * Deinits the curent active port.
421 */
422static void ahci_port_deinit_current(ahci_t __far *ahci)
423{
424 uint16_t io_base;
425 uint8_t port;
426
427 io_base = ahci->iobase;
428 port = ahci->cur_port;
429
430 if (port != 0xff)
431 {
432 /* Put the port into an idle state. */
433 ahci_ctrl_clear_bits(io_base, AHCI_PORT_REG(port, AHCI_REG_PORT_CMD),
434 AHCI_REG_PORT_CMD_FRE | AHCI_REG_PORT_CMD_ST);
435
436 while (ahci_ctrl_is_bit_set(io_base, AHCI_PORT_REG(port, AHCI_REG_PORT_CMD),
437 AHCI_REG_PORT_CMD_FRE | AHCI_REG_PORT_CMD_ST | AHCI_REG_PORT_CMD_FR | AHCI_REG_PORT_CMD_CR) == 1)
438 {
439 DBG_AHCI("AHCI: Waiting for the port to idle\n");
440 }
441
442 /*
443 * Port idles, set up memory for commands and received FIS and program the
444 * address registers.
445 */
446 //@todo: merge memsets?
447 _fmemset(&ahci->aCmdHdr[0], 0, sizeof(ahci->aCmdHdr));
448 _fmemset(&ahci->abCmd[0], 0, sizeof(ahci->abCmd));
449 _fmemset(&ahci->abFisRecv[0], 0, sizeof(ahci->abFisRecv));
450
451 VBOXAHCI_PORT_WRITE_REG(io_base, port, AHCI_REG_PORT_FB, 0);
452 VBOXAHCI_PORT_WRITE_REG(io_base, port, AHCI_REG_PORT_FBU, 0);
453
454 VBOXAHCI_PORT_WRITE_REG(io_base, port, AHCI_REG_PORT_CLB, 0);
455 VBOXAHCI_PORT_WRITE_REG(io_base, port, AHCI_REG_PORT_CLBU, 0);
456
457 /* Disable all interrupts. */
458 VBOXAHCI_PORT_WRITE_REG(io_base, port, AHCI_REG_PORT_IE, 0);
459
460 ahci->cur_port = 0xff;
461 }
462}
463
464/**
465 * Brings a port into a minimal state to make device detection possible
466 * or to queue requests.
467 */
468static void ahci_port_init(ahci_t __far *ahci, uint8_t u8Port)
469{
470 /* Deinit any other port first. */
471 ahci_port_deinit_current(ahci);
472
473 /* Put the port into an idle state. */
474 ahci_ctrl_clear_bits(ahci->iobase, AHCI_PORT_REG(u8Port, AHCI_REG_PORT_CMD),
475 AHCI_REG_PORT_CMD_FRE | AHCI_REG_PORT_CMD_ST);
476
477 while (ahci_ctrl_is_bit_set(ahci->iobase, AHCI_PORT_REG(u8Port, AHCI_REG_PORT_CMD),
478 AHCI_REG_PORT_CMD_FRE | AHCI_REG_PORT_CMD_ST | AHCI_REG_PORT_CMD_FR | AHCI_REG_PORT_CMD_CR) == 1)
479 {
480 DBG_AHCI("AHCI: Waiting for the port to idle\n");
481 }
482
483 /*
484 * Port idles, set up memory for commands and received FIS and program the
485 * address registers.
486 */
487 //@todo: just one memset?
488 _fmemset(&ahci->aCmdHdr[0], 0, sizeof(ahci->aCmdHdr));
489 _fmemset(&ahci->abCmd[0], 0, sizeof(ahci->abCmd));
490 _fmemset(&ahci->abFisRecv[0], 0, sizeof(ahci->abFisRecv));
491
492 DBG_AHCI("AHCI: FIS receive area %lx from %x:%x\n",
493 ahci_addr_to_phys(&ahci->abFisRecv), FP_SEG(ahci->abFisRecv), FP_OFF(ahci->abFisRecv));
494 VBOXAHCI_PORT_WRITE_REG(ahci->iobase, u8Port, AHCI_REG_PORT_FB, ahci_addr_to_phys(&ahci->abFisRecv));
495 VBOXAHCI_PORT_WRITE_REG(ahci->iobase, u8Port, AHCI_REG_PORT_FBU, 0);
496
497 DBG_AHCI("AHCI: CMD list area %lx\n", ahci_addr_to_phys(&ahci->aCmdHdr));
498 VBOXAHCI_PORT_WRITE_REG(ahci->iobase, u8Port, AHCI_REG_PORT_CLB, ahci_addr_to_phys(&ahci->aCmdHdr));
499 VBOXAHCI_PORT_WRITE_REG(ahci->iobase, u8Port, AHCI_REG_PORT_CLBU, 0);
500
501 /* Disable all interrupts. */
502 VBOXAHCI_PORT_WRITE_REG(ahci->iobase, u8Port, AHCI_REG_PORT_IE, 0);
503 VBOXAHCI_PORT_WRITE_REG(ahci->iobase, u8Port, AHCI_REG_PORT_IS, 0xffffffff);
504 /* Clear all errors. */
505 VBOXAHCI_PORT_WRITE_REG(ahci->iobase, u8Port, AHCI_REG_PORT_SERR, 0xffffffff);
506
507 ahci->cur_port = u8Port;
508 ahci->cur_prd = 0;
509}
510
511/**
512 * Read sectors from an attached AHCI device.
513 *
514 * @returns status code.
515 * @param bios_dsk Pointer to disk request packet (in the
516 * EBDA).
517 */
518int ahci_read_sectors(bio_dsk_t __far *bios_dsk)
519{
520 uint16_t device_id;
521 uint16_t rc;
522
523 device_id = VBOX_GET_AHCI_DEVICE(bios_dsk->drqp.dev_id);
524 if (device_id > BX_MAX_AHCI_DEVICES)
525 BX_PANIC("%s: device_id out of range %d\n", __func__, device_id);
526
527 DBG_AHCI("%s: %u sectors @ LBA %lu, device %d, port %d\n", __func__,
528 bios_dsk->drqp.nsect, bios_dsk->drqp.lba, device_id,
529 bios_dsk->ahcidev[device_id].port);
530
531 high_bits_save(bios_dsk->ahci_seg :> 0);
532 ahci_port_init(bios_dsk->ahci_seg :> 0, bios_dsk->ahcidev[device_id].port);
533 rc = ahci_cmd_data(bios_dsk, AHCI_CMD_READ_DMA_EXT);
534 DBG_AHCI("%s: transferred %lu bytes\n", __func__, ((ahci_t __far *)(bios_dsk->ahci_seg :> 0))->aCmdHdr[1]);
535 bios_dsk->drqp.trsfsectors = bios_dsk->drqp.nsect;
536#ifdef DMA_WORKAROUND
537 rep_movsw(bios_dsk->drqp.buffer, bios_dsk->drqp.buffer, bios_dsk->drqp.nsect * 512 / 2);
538#endif
539 high_bits_restore(bios_dsk->ahci_seg :> 0);
540 return rc;
541}
542
543/**
544 * Write sectors to an attached AHCI device.
545 *
546 * @returns status code.
547 * @param bios_dsk Pointer to disk request packet (in the
548 * EBDA).
549 */
550int ahci_write_sectors(bio_dsk_t __far *bios_dsk)
551{
552 uint16_t device_id;
553 uint16_t rc;
554
555 device_id = VBOX_GET_AHCI_DEVICE(bios_dsk->drqp.dev_id);
556 if (device_id > BX_MAX_AHCI_DEVICES)
557 BX_PANIC("%s: device_id out of range %d\n", __func__, device_id);
558
559 DBG_AHCI("%s: %u sectors @ LBA %lu, device %d, port %d\n", __func__,
560 bios_dsk->drqp.nsect, bios_dsk->drqp.lba, device_id,
561 bios_dsk->ahcidev[device_id].port);
562
563 high_bits_save(bios_dsk->ahci_seg :> 0);
564 ahci_port_init(bios_dsk->ahci_seg :> 0, bios_dsk->ahcidev[device_id].port);
565 rc = ahci_cmd_data(bios_dsk, AHCI_CMD_WRITE_DMA_EXT);
566 DBG_AHCI("%s: transferred %lu bytes\n", __func__, ((ahci_t __far *)(bios_dsk->ahci_seg :> 0))->aCmdHdr[1]);
567 bios_dsk->drqp.trsfsectors = bios_dsk->drqp.nsect;
568 high_bits_restore(bios_dsk->ahci_seg :> 0);
569 return rc;
570}
571
572//@todo: move
573#define ATA_DATA_NO 0x00
574#define ATA_DATA_IN 0x01
575#define ATA_DATA_OUT 0x02
576
577uint16_t ahci_cmd_packet(uint16_t device_id, uint8_t cmdlen, char __far *cmdbuf,
578 uint16_t skip_b, uint32_t length, uint8_t inout, char __far *buffer)
579{
580 bio_dsk_t __far *bios_dsk = read_word(0x0040, 0x000E) :> &EbdaData->bdisk;
581 ahci_t __far *ahci;
582
583 /* Data out is currently not supported. */
584 if (inout == ATA_DATA_OUT) {
585 BX_INFO("%s: DATA_OUT not supported yet\n", __func__);
586 return 1;
587 }
588
589 /* The skip length must be even. */
590 if (skip_b & 1) {
591 DBG_AHCI("%s: skip must be even (%04x)\n", __func__, skip_b);
592 return 1;
593 }
594
595 /* Convert to AHCI specific device number. */
596 device_id = VBOX_GET_AHCI_DEVICE(device_id);
597
598 DBG_AHCI("%s: reading %lu bytes, skip %u/%u, device %d, port %d\n", __func__,
599 length, bios_dsk->drqp.skip_b, bios_dsk->drqp.skip_a,
600 device_id, bios_dsk->ahcidev[device_id].port);
601 DBG_AHCI("%s: reading %u %u-byte sectors\n", __func__,
602 bios_dsk->drqp.nsect, bios_dsk->drqp.sect_sz);
603
604 bios_dsk->drqp.lba = (uint32_t)length << 8; //@todo: xfer length limit
605 bios_dsk->drqp.buffer = buffer;
606 bios_dsk->drqp.nsect = length / bios_dsk->drqp.sect_sz;
607// bios_dsk->drqp.sect_sz = 2048;
608
609 ahci = bios_dsk->ahci_seg :> 0;
610 high_bits_save(ahci);
611
612 ahci_port_init(bios_dsk->ahci_seg :> 0, bios_dsk->ahcidev[device_id].port);
613
614 /* Copy the ATAPI command where the HBA can fetch it. */
615 _fmemcpy(ahci->abAcmd, cmdbuf, cmdlen);
616
617 /* Reset transferred counts. */
618 // @todo: clear in calling code?
619 bios_dsk->drqp.trsfsectors = 0;
620 bios_dsk->drqp.trsfbytes = 0;
621
622 /* Set up a PRD entry to throw away the beginning of the transfer. */
623 if (bios_dsk->drqp.skip_b) {
624 ahci->aPrdt[0].len = bios_dsk->drqp.skip_b - 1;
625 ahci->aPrdt[0].phys_addr = ahci->sink_buf_phys;
626 ahci->cur_prd++;
627 }
628
629 ahci_cmd_data(bios_dsk, ATA_CMD_PACKET);
630 DBG_AHCI("%s: transferred %lu bytes\n", __func__, ahci->aCmdHdr[1]);
631 bios_dsk->drqp.trsfbytes = ahci->aCmdHdr[1];
632#ifdef DMA_WORKAROUND
633 rep_movsw(bios_dsk->drqp.buffer, bios_dsk->drqp.buffer, bios_dsk->drqp.trsfbytes / 2);
634#endif
635 high_bits_restore(ahci);
636
637 return ahci->aCmdHdr[1] == 0 ? 4 : 0;
638}
639
640void ahci_port_detect_device(ahci_t __far *ahci, uint8_t u8Port)
641{
642 uint32_t val;
643 bio_dsk_t __far *bios_dsk;
644
645 ahci_port_init(ahci, u8Port);
646
647 bios_dsk = read_word(0x0040, 0x000E) :> &EbdaData->bdisk;
648
649 /* Reset connection. */
650 VBOXAHCI_PORT_WRITE_REG(ahci->iobase, u8Port, AHCI_REG_PORT_SCTL, 0x01);
651 /*
652 * According to the spec we should wait at least 1msec until the reset
653 * is cleared but this is a virtual controller so we don't have to.
654 */
655 VBOXAHCI_PORT_WRITE_REG(ahci->iobase, u8Port, AHCI_REG_PORT_SCTL, 0);
656
657 /* Check if there is a device on the port. */
658 VBOXAHCI_PORT_READ_REG(ahci->iobase, u8Port, AHCI_REG_PORT_SSTS, val);
659 if (ahci_ctrl_extract_bits(val, 0xfL, 0) == 0)
660 return; /* No device detected. */
661
662 do
663 {
664 VBOXAHCI_PORT_READ_REG(ahci->iobase, u8Port, AHCI_REG_PORT_SSTS, val);
665 } while (ahci_ctrl_extract_bits(val, 0xfL, 0) == 0x1);
666
667 if (ahci_ctrl_extract_bits(val, 0xfL, 0) == 0x3)
668 {
669 uint8_t abBuffer[0x0200];
670 uint8_t hdcount, devcount_ahci, hd_index;
671 uint8_t cdcount;
672 uint8_t removable;
673
674 /* Clear all errors after the reset. */
675 VBOXAHCI_PORT_WRITE_REG(ahci->iobase, u8Port, AHCI_REG_PORT_SERR, 0xffffffff);
676
677 devcount_ahci = bios_dsk->ahci_devcnt;
678
679 DBG_AHCI("AHCI: Device detected on port %d\n", u8Port);
680
681 //@todo: Merge common HD/CDROM detection code
682 if (devcount_ahci < BX_MAX_AHCI_DEVICES)
683 {
684 /* Device detected, enable FIS receive. */
685 ahci_ctrl_set_bits(ahci->iobase, AHCI_PORT_REG(u8Port, AHCI_REG_PORT_CMD),
686 AHCI_REG_PORT_CMD_FRE);
687
688 /* Check signature to determine device type. */
689 VBOXAHCI_PORT_READ_REG(ahci->iobase, u8Port, AHCI_REG_PORT_SIG, val);
690 if (val == 0x101)
691 {
692 uint32_t sectors;
693 uint16_t cylinders, heads, spt;
694 chs_t lgeo;
695 uint8_t idxCmosChsBase;
696
697 DBG_AHCI("AHCI: Detected hard disk\n");
698
699 /* Identify device. */
700 bios_dsk->drqp.lba = 0;
701 bios_dsk->drqp.buffer = &abBuffer;
702 bios_dsk->drqp.nsect = 1;
703 bios_dsk->drqp.sect_sz = 512;
704 ahci_cmd_data(bios_dsk, ATA_CMD_IDENTIFY_DEVICE);
705
706 /* Calculate index into the generic device table. */
707 hd_index = devcount_ahci + BX_MAX_ATA_DEVICES + BX_MAX_SCSI_DEVICES;
708
709 removable = *(abBuffer+0) & 0x80 ? 1 : 0;
710 cylinders = *(uint16_t *)(abBuffer+(1*2)); // word 1
711 heads = *(uint16_t *)(abBuffer+(3*2)); // word 3
712 spt = *(uint16_t *)(abBuffer+(6*2)); // word 6
713 sectors = *(uint32_t *)(abBuffer+(60*2)); // word 60 and word 61
714
715 /** @todo update sectors to be a 64 bit number (also lba...). */
716 if (sectors == 0x0FFFFFFF) /* For disks bigger than ~128GB */
717 sectors = *(uint32_t *)(abBuffer+(100*2)); // words 100 to 103 (someday)
718
719 DBG_AHCI("AHCI: %ld sectors\n", sectors);
720
721 bios_dsk->ahcidev[devcount_ahci].port = u8Port;
722 bios_dsk->devices[hd_index].type = DSK_TYPE_AHCI;
723 bios_dsk->devices[hd_index].device = DSK_DEVICE_HD;
724 bios_dsk->devices[hd_index].removable = removable;
725 bios_dsk->devices[hd_index].lock = 0;
726 bios_dsk->devices[hd_index].blksize = 512;
727 bios_dsk->devices[hd_index].translation = GEO_TRANSLATION_LBA;
728 bios_dsk->devices[hd_index].sectors = sectors;
729
730 bios_dsk->devices[hd_index].pchs.heads = heads;
731 bios_dsk->devices[hd_index].pchs.cylinders = cylinders;
732 bios_dsk->devices[hd_index].pchs.spt = spt;
733
734 /* Get logical CHS geometry. */
735 switch (devcount_ahci)
736 {
737 case 0:
738 idxCmosChsBase = 0x40;
739 break;
740 case 1:
741 idxCmosChsBase = 0x48;
742 break;
743 case 2:
744 idxCmosChsBase = 0x50;
745 break;
746 case 3:
747 idxCmosChsBase = 0x58;
748 break;
749 default:
750 idxCmosChsBase = 0;
751 }
752 if (idxCmosChsBase && inb_cmos(idxCmosChsBase+7))
753 {
754 lgeo.cylinders = inb_cmos(idxCmosChsBase + 0) + (inb_cmos(idxCmosChsBase + 1) << 8);
755 lgeo.heads = inb_cmos(idxCmosChsBase + 2);
756 lgeo.spt = inb_cmos(idxCmosChsBase + 7);
757 }
758 else
759 set_geom_lba(&lgeo, sectors); /* Default EDD-style translated LBA geometry. */
760
761 BX_INFO("AHCI %d-P#%d: PCHS=%u/%u/%u LCHS=%u/%u/%u %lu sectors\n", devcount_ahci,
762 u8Port, cylinders, heads, spt, lgeo.cylinders, lgeo.heads, lgeo.spt, sectors);
763
764 bios_dsk->devices[hd_index].lchs = lgeo;
765
766 /* Store the ID of the disk in the BIOS hdidmap. */
767 hdcount = bios_dsk->hdcount;
768 bios_dsk->hdidmap[hdcount] = devcount_ahci + BX_MAX_ATA_DEVICES + BX_MAX_SCSI_DEVICES;
769 hdcount++;
770 bios_dsk->hdcount = hdcount;
771
772 /* Update hdcount in the BDA. */
773 hdcount = read_byte(0x40, 0x75);
774 hdcount++;
775 write_byte(0x40, 0x75, hdcount);
776 }
777 else if (val == 0xeb140101)
778 {
779 DBG_AHCI("AHCI: Detected ATAPI device\n");
780
781 /* Identify packet device. */
782 bios_dsk->drqp.lba = 0;
783 bios_dsk->drqp.buffer = &abBuffer;
784 bios_dsk->drqp.nsect = 1;
785 bios_dsk->drqp.sect_sz = 512;
786 ahci_cmd_data(bios_dsk, ATA_CMD_IDENTIFY_PACKET);
787
788 /* Calculate index into the generic device table. */
789 hd_index = devcount_ahci + BX_MAX_ATA_DEVICES + BX_MAX_SCSI_DEVICES;
790
791 removable = *(abBuffer+0) & 0x80 ? 1 : 0;
792
793 bios_dsk->ahcidev[devcount_ahci].port = u8Port;
794 bios_dsk->devices[hd_index].type = DSK_TYPE_AHCI;
795 bios_dsk->devices[hd_index].device = DSK_DEVICE_CDROM;
796 bios_dsk->devices[hd_index].removable = removable;
797 bios_dsk->devices[hd_index].blksize = 2048;
798
799 /* Store the ID of the device in the BIOS cdidmap. */
800 cdcount = bios_dsk->cdcount;
801 bios_dsk->cdidmap[cdcount] = devcount_ahci + BX_MAX_ATA_DEVICES + BX_MAX_SCSI_DEVICES;
802 cdcount++;
803 bios_dsk->cdcount = cdcount;
804 }
805 else
806 DBG_AHCI("AHCI: Ignoring unknown device\n");
807
808 devcount_ahci++;
809 bios_dsk->ahci_devcnt = devcount_ahci;
810 }
811 else
812 DBG_AHCI("AHCI: Reached maximum device count, skipping\n");
813 }
814}
815
816/**
817 * Allocates 1K of conventional memory.
818 */
819static uint16_t ahci_mem_alloc(void)
820{
821 uint16_t base_mem_kb;
822 uint16_t ahci_seg;
823
824 base_mem_kb = read_word(0x00, 0x0413);
825
826 DBG_AHCI("AHCI: %dK of base mem\n", base_mem_kb);
827
828 if (base_mem_kb == 0)
829 return 0;
830
831 base_mem_kb--; /* Allocate one block. */
832 ahci_seg = (((uint32_t)base_mem_kb * 1024) >> 4); /* Calculate start segment. */
833
834 write_word(0x00, 0x0413, base_mem_kb);
835
836 return ahci_seg;
837}
838
839/**
840 * Initializes the AHCI HBA and detects attached devices.
841 */
842static int ahci_hba_init(uint16_t io_base)
843{
844 uint8_t i, cPorts;
845 uint32_t val;
846 uint16_t ebda_seg;
847 uint16_t ahci_seg;
848 bio_dsk_t __far *bios_dsk;
849 ahci_t __far *ahci;
850
851
852 ebda_seg = read_word(0x0040, 0x000E);
853 bios_dsk = ebda_seg :> &EbdaData->bdisk;
854
855 AHCI_READ_REG(io_base, AHCI_REG_VS, val);
856 DBG_AHCI("AHCI: Controller version: 0x%x (major) 0x%x (minor)\n",
857 ahci_ctrl_extract_bits(val, 0xffff0000, 16),
858 ahci_ctrl_extract_bits(val, 0x0000ffff, 0));
859
860 /* Allocate 1K of base memory. */
861 ahci_seg = ahci_mem_alloc();
862 if (ahci_seg == 0)
863 {
864 DBG_AHCI("AHCI: Could not allocate 1K of memory, can't boot from controller\n");
865 return 0;
866 }
867 DBG_AHCI("AHCI: ahci_seg=%04x, size=%04x, pointer at EBDA:%04x (EBDA size=%04x)\n",
868 ahci_seg, sizeof(ahci_t), (uint16_t)&EbdaData->bdisk.ahci_seg, sizeof(ebda_data_t));
869
870 bios_dsk->ahci_seg = ahci_seg;
871 bios_dsk->ahci_devcnt = 0;
872
873 ahci = ahci_seg :> 0;
874 ahci->cur_port = 0xff;
875 ahci->iobase = io_base;
876
877 /* Physical address of memory used for throwing away ATAPI data when reading 512-byte
878 * blocks from 2048-byte CD sectors.
879 */
880 ahci->sink_buf_phys = 0xCC000; //@todo: find some better place!
881
882 /* Reset the controller. */
883 ahci_ctrl_set_bits(io_base, AHCI_REG_GHC, AHCI_GHC_HR);
884 do
885 {
886 AHCI_READ_REG(io_base, AHCI_REG_GHC, val);
887 } while (val & AHCI_GHC_HR != 0);
888
889 AHCI_READ_REG(io_base, AHCI_REG_CAP, val);
890 cPorts = ahci_ctrl_extract_bits(val, 0x1f, 0) + 1; /* Extract number of ports.*/
891
892 DBG_AHCI("AHCI: HBA has %u ports\n", cPorts);
893
894 /* Go through the ports. */
895 i = 0;
896 while (i < 32)
897 {
898 if (ahci_ctrl_is_bit_set(io_base, AHCI_REG_PI, RT_BIT_32(i)) != 0)
899 {
900 DBG_AHCI("AHCI: Port %u is present\n", i);
901 ahci_port_detect_device(ahci_seg :> 0, i);
902 cPorts--;
903 if (cPorts == 0)
904 break;
905 }
906 i++;
907 }
908
909 return 0;
910}
911
912/**
913 * Init the AHCI driver and detect attached disks.
914 */
915void BIOSCALL ahci_init(void)
916{
917 uint16_t busdevfn;
918
919 busdevfn = pci_find_classcode(0x00010601);
920 if (busdevfn != VBOX_AHCI_NO_DEVICE)
921 {
922 uint8_t u8Bus, u8DevFn;
923 uint8_t u8PciCapOff;
924
925 u8Bus = (busdevfn & 0xff00) >> 8;
926 u8DevFn = busdevfn & 0x00ff;
927
928 DBG_AHCI("AHCI HBA at Bus %u DevFn 0x%x (raw 0x%x)\n", u8Bus, u8DevFn, busdevfn);
929
930 /* Examine the capability list and search for the Serial ATA Capability Register. */
931 u8PciCapOff = pci_read_config_byte(u8Bus, u8DevFn, PCI_CONFIG_CAP);
932
933 while (u8PciCapOff != 0)
934 {
935 uint8_t u8PciCapId = pci_read_config_byte(u8Bus, u8DevFn, u8PciCapOff);
936
937 DBG_AHCI("Capability ID 0x%x at 0x%x\n", u8PciCapId, u8PciCapOff);
938
939 if (u8PciCapId == PCI_CAP_ID_SATACR)
940 break;
941
942 /* Go on to the next capability. */
943 u8PciCapOff = pci_read_config_byte(u8Bus, u8DevFn, u8PciCapOff + 1);
944 }
945
946 if (u8PciCapOff != 0)
947 {
948 uint8_t u8Rev;
949
950 DBG_AHCI("AHCI HBA with SATA Capability register at 0x%x\n", u8PciCapOff);
951
952 /* Advance to the stuff behind the id and next capability pointer. */
953 u8PciCapOff += 2;
954
955 u8Rev = pci_read_config_byte(u8Bus, u8DevFn, u8PciCapOff);
956 if (u8Rev == 0x10)
957 {
958 /* Read the SATACR1 register and get the bar and offset of the index/data pair register. */
959 uint8_t u8Bar = 0x00;
960 uint16_t u16Off = 0x00;
961 uint16_t u16BarOff = pci_read_config_word(u8Bus, u8DevFn, u8PciCapOff + 2);
962
963 DBG_AHCI("SATACR1: 0x%x\n", u16BarOff);
964
965 switch (u16BarOff & 0xf)
966 {
967 case 0x04:
968 u8Bar = 0x10;
969 break;
970 case 0x05:
971 u8Bar = 0x14;
972 break;
973 case 0x06:
974 u8Bar = 0x18;
975 break;
976 case 0x07:
977 u8Bar = 0x1c;
978 break;
979 case 0x08:
980 u8Bar = 0x20;
981 break;
982 case 0x09:
983 u8Bar = 0x24;
984 break;
985 case 0x0f:
986 default:
987 /* Reserved or unsupported. */
988 DBG_AHCI("BAR 0x%x unsupported\n", u16BarOff & 0xf);
989 }
990
991 /* Get the offset inside the BAR from bits 4:15. */
992 u16Off = (u16BarOff >> 4) * 4;
993
994 if (u8Bar != 0x00)
995 {
996 uint32_t u32Bar = pci_read_config_dword(u8Bus, u8DevFn, u8Bar);
997
998 DBG_AHCI("BAR at 0x%x : 0x%x\n", u8Bar, u32Bar);
999
1000 if ((u32Bar & 0x01) != 0)
1001 {
1002 int rc;
1003 uint16_t u16AhciIoBase = (u32Bar & 0xfff0) + u16Off;
1004
1005 DBG_AHCI("I/O base: 0x%x\n", u16AhciIoBase);
1006 rc = ahci_hba_init(u16AhciIoBase);
1007 }
1008 else
1009 DBG_AHCI("BAR is MMIO\n");
1010 }
1011 }
1012 else
1013 DBG_AHCI("Invalid revision 0x%x\n", u8Rev);
1014 }
1015 else
1016 DBG_AHCI("AHCI HBA with no usable Index/Data register pair!\n");
1017 }
1018 else
1019 DBG_AHCI("No AHCI HBA!\n");
1020}
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