1 // Low level ATA disk access
2 //
3 // Copyright (C) 2008,2009 Kevin O'Connor <kevin@koconnor.net>
4 // Copyright (C) 2002 MandrakeSoft S.A.
5 //
6 // This file may be distributed under the terms of the GNU LGPLv3 license.
7
8 #include "ata.h" // ATA_CB_STAT
9 #include "biosvar.h" // GET_GLOBALFLAT
10 #include "block.h" // struct drive_s
11 #include "blockcmd.h" // CDB_CMD_READ_10
12 #include "byteorder.h" // be16_to_cpu
13 #include "malloc.h" // malloc_fseg
14 #include "output.h" // dprintf
15 #include "pci.h" // pci_config_readb
16 #include "pcidevice.h" // foreachpci
17 #include "pci_ids.h" // PCI_CLASS_STORAGE_OTHER
18 #include "pci_regs.h" // PCI_INTERRUPT_LINE
19 #include "pic.h" // enable_hwirq
20 #include "stacks.h" // yield
21 #include "std/disk.h" // DISK_RET_SUCCESS
22 #include "string.h" // memset
23 #include "util.h" // timer_calc
24 #include "x86.h" // inb
25
26 #define IDE_TIMEOUT 32000 //32 seconds max for IDE ops
27
28
29 /****************************************************************
30 * Helper functions
31 ****************************************************************/
32
33 // Wait for the specified ide state
34 static inline int
await_ide(u8 mask,u8 flags,portaddr_t base,u16 timeout)35 await_ide(u8 mask, u8 flags, portaddr_t base, u16 timeout)
36 {
37 u32 end = timer_calc(timeout);
38 for (;;) {
39 u8 status = inb(base+ATA_CB_STAT);
40 if ((status & mask) == flags)
41 return status;
42 if (timer_check(end)) {
43 warn_timeout();
44 return -1;
45 }
46 yield();
47 }
48 }
49
50 // Wait for the device to be not-busy.
51 static int
await_not_bsy(portaddr_t base)52 await_not_bsy(portaddr_t base)
53 {
54 return await_ide(ATA_CB_STAT_BSY, 0, base, IDE_TIMEOUT);
55 }
56
57 // Wait for the device to be ready.
58 static int
await_rdy(portaddr_t base)59 await_rdy(portaddr_t base)
60 {
61 return await_ide(ATA_CB_STAT_RDY, ATA_CB_STAT_RDY, base, IDE_TIMEOUT);
62 }
63
64 // Wait for ide state - pauses for one ata cycle first.
65 static inline int
pause_await_not_bsy(portaddr_t iobase1,portaddr_t iobase2)66 pause_await_not_bsy(portaddr_t iobase1, portaddr_t iobase2)
67 {
68 // Wait one PIO transfer cycle.
69 inb(iobase2 + ATA_CB_ASTAT);
70
71 return await_not_bsy(iobase1);
72 }
73
74 // Wait for ide state - pause for 400ns first.
75 static inline int
ndelay_await_not_bsy(portaddr_t iobase1)76 ndelay_await_not_bsy(portaddr_t iobase1)
77 {
78 ndelay(400);
79 return await_not_bsy(iobase1);
80 }
81
82 // Reset a drive
83 static void
ata_reset(struct atadrive_s * adrive_gf)84 ata_reset(struct atadrive_s *adrive_gf)
85 {
86 struct ata_channel_s *chan_gf = GET_GLOBALFLAT(adrive_gf->chan_gf);
87 u8 slave = GET_GLOBALFLAT(adrive_gf->slave);
88 portaddr_t iobase1 = GET_GLOBALFLAT(chan_gf->iobase1);
89 portaddr_t iobase2 = GET_GLOBALFLAT(chan_gf->iobase2);
90
91 dprintf(6, "ata_reset drive=%p\n", &adrive_gf->drive);
92 // Pulse SRST
93 outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN | ATA_CB_DC_SRST, iobase2+ATA_CB_DC);
94 udelay(5);
95 outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2+ATA_CB_DC);
96 msleep(2);
97
98 // wait for device to become not busy.
99 int status = await_not_bsy(iobase1);
100 if (status < 0)
101 goto done;
102 if (slave) {
103 // Change device.
104 u32 end = timer_calc(IDE_TIMEOUT);
105 for (;;) {
106 outb(ATA_CB_DH_DEV1, iobase1 + ATA_CB_DH);
107 status = ndelay_await_not_bsy(iobase1);
108 if (status < 0)
109 goto done;
110 if (inb(iobase1 + ATA_CB_DH) == ATA_CB_DH_DEV1)
111 break;
112 // Change drive request failed to take effect - retry.
113 if (timer_check(end)) {
114 warn_timeout();
115 goto done;
116 }
117 }
118 } else {
119 // QEMU doesn't reset dh on reset, so set it explicitly.
120 outb(ATA_CB_DH_DEV0, iobase1 + ATA_CB_DH);
121 }
122
123 // On a user-reset request, wait for RDY if it is an ATA device.
124 u8 type=GET_GLOBALFLAT(adrive_gf->drive.type);
125 if (type == DTYPE_ATA)
126 status = await_rdy(iobase1);
127
128 done:
129 // Enable interrupts
130 outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC);
131
132 dprintf(6, "ata_reset exit status=%x\n", status);
133 }
134
135 // Check for drive RDY for 16bit interface command.
136 static int
isready(struct atadrive_s * adrive_gf)137 isready(struct atadrive_s *adrive_gf)
138 {
139 // Read the status from controller
140 struct ata_channel_s *chan_gf = GET_GLOBALFLAT(adrive_gf->chan_gf);
141 portaddr_t iobase1 = GET_GLOBALFLAT(chan_gf->iobase1);
142 u8 status = inb(iobase1 + ATA_CB_STAT);
143 if ((status & (ATA_CB_STAT_BSY|ATA_CB_STAT_RDY)) == ATA_CB_STAT_RDY)
144 return DISK_RET_SUCCESS;
145 return DISK_RET_ENOTREADY;
146 }
147
148
149 /****************************************************************
150 * ATA send command
151 ****************************************************************/
152
153 struct ata_pio_command {
154 u8 feature;
155 u8 sector_count;
156 u8 lba_low;
157 u8 lba_mid;
158 u8 lba_high;
159 u8 device;
160 u8 command;
161
162 u8 feature2;
163 u8 sector_count2;
164 u8 lba_low2;
165 u8 lba_mid2;
166 u8 lba_high2;
167 };
168
169 // Send an ata command to the drive.
170 static int
send_cmd(struct atadrive_s * adrive_gf,struct ata_pio_command * cmd)171 send_cmd(struct atadrive_s *adrive_gf, struct ata_pio_command *cmd)
172 {
173 struct ata_channel_s *chan_gf = GET_GLOBALFLAT(adrive_gf->chan_gf);
174 u8 slave = GET_GLOBALFLAT(adrive_gf->slave);
175 portaddr_t iobase1 = GET_GLOBALFLAT(chan_gf->iobase1);
176
177 // Select device
178 int status = await_not_bsy(iobase1);
179 if (status < 0)
180 return status;
181 u8 newdh = ((cmd->device & ~ATA_CB_DH_DEV1)
182 | (slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0));
183 u8 olddh = inb(iobase1 + ATA_CB_DH);
184 outb(newdh, iobase1 + ATA_CB_DH);
185 if ((olddh ^ newdh) & (1<<4)) {
186 // Was a device change - wait for device to become not busy.
187 status = ndelay_await_not_bsy(iobase1);
188 if (status < 0)
189 return status;
190 }
191
192 // Check for ATA_CMD_(READ|WRITE)_(SECTORS|DMA)_EXT commands.
193 if ((cmd->command & ~0x11) == ATA_CMD_READ_SECTORS_EXT) {
194 outb(cmd->feature2, iobase1 + ATA_CB_FR);
195 outb(cmd->sector_count2, iobase1 + ATA_CB_SC);
196 outb(cmd->lba_low2, iobase1 + ATA_CB_SN);
197 outb(cmd->lba_mid2, iobase1 + ATA_CB_CL);
198 outb(cmd->lba_high2, iobase1 + ATA_CB_CH);
199 }
200 outb(cmd->feature, iobase1 + ATA_CB_FR);
201 outb(cmd->sector_count, iobase1 + ATA_CB_SC);
202 outb(cmd->lba_low, iobase1 + ATA_CB_SN);
203 outb(cmd->lba_mid, iobase1 + ATA_CB_CL);
204 outb(cmd->lba_high, iobase1 + ATA_CB_CH);
205 outb(cmd->command, iobase1 + ATA_CB_CMD);
206
207 return 0;
208 }
209
210 // Wait for data after calling 'send_cmd'.
211 static int
ata_wait_data(portaddr_t iobase1)212 ata_wait_data(portaddr_t iobase1)
213 {
214 int status = ndelay_await_not_bsy(iobase1);
215 if (status < 0)
216 return status;
217
218 if (status & ATA_CB_STAT_ERR) {
219 dprintf(6, "send_cmd : read error (status=%02x err=%02x)\n"
220 , status, inb(iobase1 + ATA_CB_ERR));
221 return -4;
222 }
223 if (!(status & ATA_CB_STAT_DRQ)) {
224 dprintf(6, "send_cmd : DRQ not set (status %02x)\n", status);
225 return -5;
226 }
227
228 return 0;
229 }
230
231 // Send an ata command that does not transfer any further data.
232 int
ata_cmd_nondata(struct atadrive_s * adrive_gf,struct ata_pio_command * cmd)233 ata_cmd_nondata(struct atadrive_s *adrive_gf, struct ata_pio_command *cmd)
234 {
235 struct ata_channel_s *chan_gf = GET_GLOBALFLAT(adrive_gf->chan_gf);
236 portaddr_t iobase1 = GET_GLOBALFLAT(chan_gf->iobase1);
237 portaddr_t iobase2 = GET_GLOBALFLAT(chan_gf->iobase2);
238
239 // Disable interrupts
240 outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2 + ATA_CB_DC);
241
242 int ret = send_cmd(adrive_gf, cmd);
243 if (ret)
244 goto fail;
245 ret = ndelay_await_not_bsy(iobase1);
246 if (ret < 0)
247 goto fail;
248
249 if (ret & ATA_CB_STAT_ERR) {
250 dprintf(6, "nondata cmd : read error (status=%02x err=%02x)\n"
251 , ret, inb(iobase1 + ATA_CB_ERR));
252 ret = -4;
253 goto fail;
254 }
255 if (ret & ATA_CB_STAT_DRQ) {
256 dprintf(6, "nondata cmd : DRQ set (status %02x)\n", ret);
257 ret = -5;
258 goto fail;
259 }
260
261 fail:
262 // Enable interrupts
263 outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC);
264
265 return ret;
266 }
267
268
269 /****************************************************************
270 * ATA PIO transfers
271 ****************************************************************/
272
273 // Transfer 'op->count' blocks (of 'blocksize' bytes) to/from drive
274 // 'op->drive_fl'.
275 static int
ata_pio_transfer(struct disk_op_s * op,int iswrite,int blocksize)276 ata_pio_transfer(struct disk_op_s *op, int iswrite, int blocksize)
277 {
278 dprintf(16, "ata_pio_transfer id=%p write=%d count=%d bs=%d buf=%p\n"
279 , op->drive_fl, iswrite, op->count, blocksize, op->buf_fl);
280
281 struct atadrive_s *adrive_gf = container_of(
282 op->drive_fl, struct atadrive_s, drive);
283 struct ata_channel_s *chan_gf = GET_GLOBALFLAT(adrive_gf->chan_gf);
284 portaddr_t iobase1 = GET_GLOBALFLAT(chan_gf->iobase1);
285 portaddr_t iobase2 = GET_GLOBALFLAT(chan_gf->iobase2);
286 int count = op->count;
287 void *buf_fl = op->buf_fl;
288 int status;
289 for (;;) {
290 if (iswrite) {
291 // Write data to controller
292 dprintf(16, "Write sector id=%p dest=%p\n", op->drive_fl, buf_fl);
293 if (CONFIG_ATA_PIO32)
294 outsl_fl(iobase1, buf_fl, blocksize / 4);
295 else
296 outsw_fl(iobase1, buf_fl, blocksize / 2);
297 } else {
298 // Read data from controller
299 dprintf(16, "Read sector id=%p dest=%p\n", op->drive_fl, buf_fl);
300 if (CONFIG_ATA_PIO32)
301 insl_fl(iobase1, buf_fl, blocksize / 4);
302 else
303 insw_fl(iobase1, buf_fl, blocksize / 2);
304 }
305 buf_fl += blocksize;
306
307 status = pause_await_not_bsy(iobase1, iobase2);
308 if (status < 0) {
309 // Error
310 op->count -= count;
311 return status;
312 }
313
314 count--;
315 if (!count)
316 break;
317 status &= (ATA_CB_STAT_BSY | ATA_CB_STAT_DRQ | ATA_CB_STAT_ERR);
318 if (status != ATA_CB_STAT_DRQ) {
319 dprintf(6, "ata_pio_transfer : more sectors left (status %02x)\n"
320 , status);
321 op->count -= count;
322 return -6;
323 }
324 }
325
326 status &= (ATA_CB_STAT_BSY | ATA_CB_STAT_DF | ATA_CB_STAT_DRQ
327 | ATA_CB_STAT_ERR);
328 if (!iswrite)
329 status &= ~ATA_CB_STAT_DF;
330 if (status != 0) {
331 dprintf(6, "ata_pio_transfer : no sectors left (status %02x)\n", status);
332 return -7;
333 }
334
335 return 0;
336 }
337
338
339 /****************************************************************
340 * ATA DMA transfers
341 ****************************************************************/
342
343 #define BM_CMD 0
344 #define BM_CMD_MEMWRITE 0x08
345 #define BM_CMD_START 0x01
346 #define BM_STATUS 2
347 #define BM_STATUS_IRQ 0x04
348 #define BM_STATUS_ERROR 0x02
349 #define BM_STATUS_ACTIVE 0x01
350 #define BM_TABLE 4
351
352 struct sff_dma_prd {
353 u32 buf_fl;
354 u32 count;
355 };
356
357 // Check if DMA available and setup transfer if so.
358 static int
ata_try_dma(struct disk_op_s * op,int iswrite,int blocksize)359 ata_try_dma(struct disk_op_s *op, int iswrite, int blocksize)
360 {
361 if (! CONFIG_ATA_DMA)
362 return -1;
363 ASSERT16(); // behin ATA_DMA, needed on parisc to boot via ata
364 u32 dest = (u32)op->buf_fl;
365 if (dest & 1)
366 // Need minimum alignment of 1.
367 return -1;
368 struct atadrive_s *adrive_gf = container_of(
369 op->drive_fl, struct atadrive_s, drive);
370 struct ata_channel_s *chan_gf = GET_GLOBALFLAT(adrive_gf->chan_gf);
371 portaddr_t iomaster = GET_GLOBALFLAT(chan_gf->iomaster);
372 if (! iomaster)
373 return -1;
374 u32 bytes = op->count * blocksize;
375 if (! bytes)
376 return -1;
377
378 // Build PRD dma structure.
379 struct sff_dma_prd *dma = MAKE_FLATPTR(SEG_LOW, ExtraStack);
380 struct sff_dma_prd *origdma = dma;
381 while (bytes) {
382 if (dma >= &origdma[16])
383 // Too many descriptors..
384 return -1;
385 u32 count = bytes;
386 u32 max = 0x10000 - (dest & 0xffff);
387 if (count > max)
388 count = max;
389
390 SET_LOWFLAT(dma->buf_fl, dest);
391 bytes -= count;
392 if (!bytes)
393 // Last descriptor.
394 count |= 1<<31;
395 dprintf(16, "dma@%p: %08x %08x\n", dma, dest, count);
396 dest += count;
397 SET_LOWFLAT(dma->count, count);
398 dma++;
399 }
400
401 // Program bus-master controller.
402 outl((u32)origdma, iomaster + BM_TABLE);
403 u8 oldcmd = inb(iomaster + BM_CMD) & ~(BM_CMD_MEMWRITE|BM_CMD_START);
404 outb(oldcmd | (iswrite ? 0x00 : BM_CMD_MEMWRITE), iomaster + BM_CMD);
405 outb(BM_STATUS_ERROR|BM_STATUS_IRQ, iomaster + BM_STATUS);
406
407 return 0;
408 }
409
410 // Transfer data using DMA.
411 static int
ata_dma_transfer(struct disk_op_s * op)412 ata_dma_transfer(struct disk_op_s *op)
413 {
414 if (! CONFIG_ATA_DMA)
415 return -1;
416 dprintf(16, "ata_dma_transfer id=%p buf=%p\n", op->drive_fl, op->buf_fl);
417
418 struct atadrive_s *adrive_gf = container_of(
419 op->drive_fl, struct atadrive_s, drive);
420 struct ata_channel_s *chan_gf = GET_GLOBALFLAT(adrive_gf->chan_gf);
421 portaddr_t iomaster = GET_GLOBALFLAT(chan_gf->iomaster);
422
423 // Start bus-master controller.
424 u8 oldcmd = inb(iomaster + BM_CMD);
425 outb(oldcmd | BM_CMD_START, iomaster + BM_CMD);
426
427 u32 end = timer_calc(IDE_TIMEOUT);
428 u8 status;
429 for (;;) {
430 status = inb(iomaster + BM_STATUS);
431 if (status & BM_STATUS_IRQ)
432 break;
433 // Transfer in progress
434 if (timer_check(end)) {
435 // Timeout.
436 warn_timeout();
437 break;
438 }
439 yield();
440 }
441 outb(oldcmd & ~BM_CMD_START, iomaster + BM_CMD);
442
443 portaddr_t iobase1 = GET_GLOBALFLAT(chan_gf->iobase1);
444 portaddr_t iobase2 = GET_GLOBALFLAT(chan_gf->iobase2);
445 int idestatus = pause_await_not_bsy(iobase1, iobase2);
446
447 if ((status & (BM_STATUS_IRQ|BM_STATUS_ACTIVE)) == BM_STATUS_IRQ
448 && idestatus >= 0x00
449 && (idestatus & (ATA_CB_STAT_BSY | ATA_CB_STAT_DF | ATA_CB_STAT_DRQ
450 | ATA_CB_STAT_ERR)) == 0x00)
451 // Success.
452 return 0;
453
454 dprintf(6, "IDE DMA error (dma=%x ide=%x/%x/%x)\n", status, idestatus
455 , inb(iobase2 + ATA_CB_ASTAT), inb(iobase1 + ATA_CB_ERR));
456 return -1;
457 }
458
459
460 /****************************************************************
461 * ATA hard drive functions
462 ****************************************************************/
463
464 // Transfer data to harddrive using PIO protocol.
465 static int
ata_pio_cmd_data(struct disk_op_s * op,int iswrite,struct ata_pio_command * cmd)466 ata_pio_cmd_data(struct disk_op_s *op, int iswrite, struct ata_pio_command *cmd)
467 {
468 struct atadrive_s *adrive_gf = container_of(
469 op->drive_fl, struct atadrive_s, drive);
470 struct ata_channel_s *chan_gf = GET_GLOBALFLAT(adrive_gf->chan_gf);
471 portaddr_t iobase1 = GET_GLOBALFLAT(chan_gf->iobase1);
472 portaddr_t iobase2 = GET_GLOBALFLAT(chan_gf->iobase2);
473
474 // Disable interrupts
475 outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2 + ATA_CB_DC);
476
477 int ret = send_cmd(adrive_gf, cmd);
478 if (ret)
479 goto fail;
480 ret = ata_wait_data(iobase1);
481 if (ret)
482 goto fail;
483 ret = ata_pio_transfer(op, iswrite, DISK_SECTOR_SIZE);
484
485 fail:
486 // Enable interrupts
487 outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC);
488 return ret;
489 }
490
491 // Transfer data to harddrive using DMA protocol.
492 static int
ata_dma_cmd_data(struct disk_op_s * op,struct ata_pio_command * cmd)493 ata_dma_cmd_data(struct disk_op_s *op, struct ata_pio_command *cmd)
494 {
495 if (! CONFIG_ATA_DMA)
496 return -1;
497 struct atadrive_s *adrive_gf = container_of(
498 op->drive_fl, struct atadrive_s, drive);
499 int ret = send_cmd(adrive_gf, cmd);
500 if (ret)
501 return ret;
502 return ata_dma_transfer(op);
503 }
504
505 // Read/write count blocks from a harddrive.
506 static int
ata_readwrite(struct disk_op_s * op,int iswrite)507 ata_readwrite(struct disk_op_s *op, int iswrite)
508 {
509 u64 lba = op->lba;
510
511 int usepio = ata_try_dma(op, iswrite, DISK_SECTOR_SIZE);
512
513 struct ata_pio_command cmd;
514 memset(&cmd, 0, sizeof(cmd));
515
516 if (op->count >= (1<<8) || lba + op->count >= (1<<28)) {
517 cmd.sector_count2 = op->count >> 8;
518 cmd.lba_low2 = lba >> 24;
519 cmd.lba_mid2 = lba >> 32;
520 cmd.lba_high2 = lba >> 40;
521 lba &= 0xffffff;
522
523 if (usepio)
524 cmd.command = (iswrite ? ATA_CMD_WRITE_SECTORS_EXT
525 : ATA_CMD_READ_SECTORS_EXT);
526 else
527 cmd.command = (iswrite ? ATA_CMD_WRITE_DMA_EXT
528 : ATA_CMD_READ_DMA_EXT);
529 } else {
530 if (usepio)
531 cmd.command = (iswrite ? ATA_CMD_WRITE_SECTORS
532 : ATA_CMD_READ_SECTORS);
533 else
534 cmd.command = (iswrite ? ATA_CMD_WRITE_DMA
535 : ATA_CMD_READ_DMA);
536 }
537
538 cmd.sector_count = op->count;
539 cmd.lba_low = lba;
540 cmd.lba_mid = lba >> 8;
541 cmd.lba_high = lba >> 16;
542 cmd.device = ((lba >> 24) & 0xf) | ATA_CB_DH_LBA;
543
544 int ret;
545 if (usepio)
546 ret = ata_pio_cmd_data(op, iswrite, &cmd);
547 else
548 ret = ata_dma_cmd_data(op, &cmd);
549 if (ret)
550 return DISK_RET_EBADTRACK;
551 return DISK_RET_SUCCESS;
552 }
553
554 // 16bit command demuxer for ATA harddrives.
555 int
ata_process_op(struct disk_op_s * op)556 ata_process_op(struct disk_op_s *op)
557 {
558 if (!CONFIG_ATA)
559 return 0;
560
561 struct atadrive_s *adrive_gf = container_of(
562 op->drive_fl, struct atadrive_s, drive);
563 switch (op->command) {
564 case CMD_READ:
565 return ata_readwrite(op, 0);
566 case CMD_WRITE:
567 return ata_readwrite(op, 1);
568 case CMD_RESET:
569 ata_reset(adrive_gf);
570 return DISK_RET_SUCCESS;
571 case CMD_ISREADY:
572 return isready(adrive_gf);
573 default:
574 return default_process_op(op);
575 }
576 }
577
578
579 /****************************************************************
580 * ATAPI functions
581 ****************************************************************/
582
583 #define CDROM_CDB_SIZE 12
584
585 // Low-level atapi command transmit function.
586 int
ata_atapi_process_op(struct disk_op_s * op)587 ata_atapi_process_op(struct disk_op_s *op)
588 {
589 if (! CONFIG_ATA)
590 return 0;
591
592 if (op->command == CMD_WRITE || op->command == CMD_FORMAT)
593 return DISK_RET_EWRITEPROTECT;
594 u8 cdbcmd[CDROM_CDB_SIZE];
595 int blocksize = scsi_fill_cmd(op, cdbcmd, sizeof(cdbcmd));
596 if (blocksize < 0)
597 return default_process_op(op);
598
599 struct atadrive_s *adrive_gf = container_of(
600 op->drive_fl, struct atadrive_s, drive);
601 struct ata_channel_s *chan_gf = GET_GLOBALFLAT(adrive_gf->chan_gf);
602 portaddr_t iobase1 = GET_GLOBALFLAT(chan_gf->iobase1);
603 portaddr_t iobase2 = GET_GLOBALFLAT(chan_gf->iobase2);
604
605 struct ata_pio_command cmd;
606 memset(&cmd, 0, sizeof(cmd));
607 cmd.lba_mid = blocksize;
608 cmd.lba_high = blocksize >> 8;
609 cmd.command = ATA_CMD_PACKET;
610
611 // Disable interrupts
612 outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2 + ATA_CB_DC);
613
614 int ret = send_cmd(adrive_gf, &cmd);
615 if (ret)
616 goto fail;
617 ret = ata_wait_data(iobase1);
618 if (ret)
619 goto fail;
620
621 // Send command to device
622 outsw_fl(iobase1, MAKE_FLATPTR(GET_SEG(SS), cdbcmd), CDROM_CDB_SIZE / 2);
623
624 int status = pause_await_not_bsy(iobase1, iobase2);
625 if (status < 0) {
626 ret = status;
627 goto fail;
628 }
629
630 if (status & ATA_CB_STAT_ERR) {
631 u8 err = inb(iobase1 + ATA_CB_ERR);
632 // skip "Not Ready"
633 if (err != 0x20)
634 dprintf(6, "send_atapi_cmd : read error (status=%02x err=%02x)\n"
635 , status, err);
636 ret = -2;
637 goto fail;
638 }
639 if (blocksize) {
640 if (!(status & ATA_CB_STAT_DRQ)) {
641 dprintf(6, "send_atapi_cmd : DRQ not set (status %02x)\n", status);
642 ret = -3;
643 goto fail;
644 }
645
646 ret = ata_pio_transfer(op, 0, blocksize);
647 }
648
649 fail:
650 // Enable interrupts
651 outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC);
652 if (ret)
653 return DISK_RET_EBADTRACK;
654 return DISK_RET_SUCCESS;
655 }
656
657
658 /****************************************************************
659 * ATA detect and init
660 ****************************************************************/
661
662 // Send an identify device or identify device packet command.
663 static int
send_ata_identity(struct atadrive_s * adrive,u16 * buffer,int command)664 send_ata_identity(struct atadrive_s *adrive, u16 *buffer, int command)
665 {
666 memset(buffer, 0, DISK_SECTOR_SIZE);
667
668 struct disk_op_s dop;
669 memset(&dop, 0, sizeof(dop));
670 dop.drive_fl = &adrive->drive;
671 dop.count = 1;
672 dop.lba = 1;
673 dop.buf_fl = MAKE_FLATPTR(GET_SEG(SS), buffer);
674
675 struct ata_pio_command cmd;
676 memset(&cmd, 0, sizeof(cmd));
677 cmd.command = command;
678
679 return ata_pio_cmd_data(&dop, 0, &cmd);
680 }
681
682 // Extract the ATA/ATAPI version info.
683 int
ata_extract_version(u16 * buffer)684 ata_extract_version(u16 *buffer)
685 {
686 // Extract ATA/ATAPI version.
687 u16 ataversion = buffer[80];
688 u8 version;
689 for (version=15; version>0; version--)
690 if (ataversion & (1<<version))
691 break;
692 return version;
693 }
694
695 #define MAXMODEL 40
696
697 // Extract the ATA/ATAPI model info.
698 char *
ata_extract_model(char * model,u32 size,u16 * buffer)699 ata_extract_model(char *model, u32 size, u16 *buffer)
700 {
701 // Read model name
702 int i;
703 for (i=0; i<size/2; i++)
704 *(u16*)&model[i*2] = le16_to_cpu(buffer[27+i]);
705 model[size] = 0x00;
706 nullTrailingSpace(model);
707 return model;
708 }
709
710 // Common init code between ata and atapi
711 static struct atadrive_s *
init_atadrive(struct atadrive_s * dummy,u16 * buffer)712 init_atadrive(struct atadrive_s *dummy, u16 *buffer)
713 {
714 struct atadrive_s *adrive = malloc_fseg(sizeof(*adrive));
715 if (!adrive) {
716 warn_noalloc();
717 return NULL;
718 }
719 memset(adrive, 0, sizeof(*adrive));
720 adrive->chan_gf = dummy->chan_gf;
721 adrive->slave = dummy->slave;
722 adrive->drive.cntl_id = adrive->chan_gf->ataid * 2 + dummy->slave;
723 adrive->drive.removable = le16_to_cpu((buffer[0]) & 0x80) ? 1 : 0;
724 return adrive;
725 }
726
727 // Detect if the given drive is an atapi - initialize it if so.
728 static struct atadrive_s *
init_drive_atapi(struct atadrive_s * dummy,u16 * buffer)729 init_drive_atapi(struct atadrive_s *dummy, u16 *buffer)
730 {
731 // Send an IDENTIFY_DEVICE_PACKET command to device
732 int ret = send_ata_identity(dummy, buffer, ATA_CMD_IDENTIFY_PACKET_DEVICE);
733 if (ret)
734 return NULL;
735
736 // Success - setup as ATAPI.
737 struct atadrive_s *adrive = init_atadrive(dummy, buffer);
738 if (!adrive)
739 return NULL;
740 adrive->drive.type = DTYPE_ATA_ATAPI;
741 adrive->drive.blksize = CDROM_SECTOR_SIZE;
742 adrive->drive.sectors = (u64)-1;
743 u8 iscd = ((le16_to_cpu(buffer[0]) >> 8) & 0x1f) == 0x05;
744 char model[MAXMODEL+1];
745 char *desc = znprintf(MAXDESCSIZE
746 , "DVD/CD [ata%d-%d: %s ATAPI-%d %s]"
747 , adrive->chan_gf->ataid, adrive->slave
748 , ata_extract_model(model, MAXMODEL, buffer)
749 , ata_extract_version(buffer)
750 , (iscd ? "DVD/CD" : "Device"));
751 dprintf(1, "%s\n", desc);
752
753 // fill cdidmap
754 if (iscd) {
755 int prio = bootprio_find_ata_device(adrive->chan_gf->pci_tmp,
756 adrive->chan_gf->chanid,
757 adrive->slave);
758 boot_add_cd(&adrive->drive, desc, prio);
759 }
760
761 return adrive;
762 }
763
764 // Detect if the given drive is a regular ata drive - initialize it if so.
765 static struct atadrive_s *
init_drive_ata(struct atadrive_s * dummy,u16 * buffer)766 init_drive_ata(struct atadrive_s *dummy, u16 *buffer)
767 {
768 // Send an IDENTIFY_DEVICE command to device
769 int ret = send_ata_identity(dummy, buffer, ATA_CMD_IDENTIFY_DEVICE);
770 if (ret)
771 return NULL;
772
773 // Success - setup as ATA.
774 struct atadrive_s *adrive = init_atadrive(dummy, buffer);
775 if (!adrive)
776 return NULL;
777 adrive->drive.type = DTYPE_ATA;
778 adrive->drive.blksize = DISK_SECTOR_SIZE;
779
780 adrive->drive.pchs.cylinder = le16_to_cpu(buffer[1]);
781 adrive->drive.pchs.head = le16_to_cpu(buffer[3]);
782 adrive->drive.pchs.sector = le16_to_cpu(buffer[6]);
783
784 u64 sectors;
785 if (le16_to_cpu(buffer[83]) & (1 << 10)) // word 83 - lba48 support
786 sectors = le64_to_cpu(*(u64*)&buffer[100]); // word 100-103
787 else
788 sectors = le32_to_cpu(*(u32*)&buffer[60]); // word 60 and word 61
789 adrive->drive.sectors = sectors;
790 u64 adjsize = sectors >> 11;
791 char adjprefix = 'M';
792 if (adjsize >= (1 << 16)) {
793 adjsize >>= 10;
794 adjprefix = 'G';
795 }
796 char model[MAXMODEL+1];
797 char *desc = znprintf(MAXDESCSIZE
798 , "ata%d-%d: %s ATA-%d Hard-Disk (%u %ciBytes)"
799 , adrive->chan_gf->ataid, adrive->slave
800 , ata_extract_model(model, MAXMODEL, buffer)
801 , ata_extract_version(buffer)
802 , (u32)adjsize, adjprefix);
803 dprintf(1, "%s\n", desc);
804
805 int prio = bootprio_find_ata_device(adrive->chan_gf->pci_tmp,
806 adrive->chan_gf->chanid,
807 adrive->slave);
808 // Register with bcv system.
809 boot_add_hd(&adrive->drive, desc, prio);
810
811 return adrive;
812 }
813
814 static u32 SpinupEnd;
815
816 // Wait for non-busy status and check for "floating bus" condition.
817 static int
powerup_await_non_bsy(portaddr_t base)818 powerup_await_non_bsy(portaddr_t base)
819 {
820 u8 orstatus = 0;
821 u8 status;
822 for (;;) {
823 status = inb(base+ATA_CB_STAT);
824 if (!(status & ATA_CB_STAT_BSY))
825 break;
826 orstatus |= status;
827 if (orstatus == 0xff) {
828 dprintf(4, "powerup IDE floating\n");
829 return orstatus;
830 }
831 if (timer_check(SpinupEnd)) {
832 warn_timeout();
833 return -1;
834 }
835 yield();
836 }
837 dprintf(6, "powerup iobase=%x st=%x\n", base, status);
838 return status;
839 }
840
841 // Detect any drives attached to a given controller.
842 static void
ata_detect(void * data)843 ata_detect(void *data)
844 {
845 struct ata_channel_s *chan_gf = data;
846 struct atadrive_s dummy;
847 memset(&dummy, 0, sizeof(dummy));
848 dummy.chan_gf = chan_gf;
849 // Device detection
850 int didreset = 0;
851 u8 slave;
852 for (slave=0; slave<=1; slave++) {
853 // Wait for not-bsy.
854 portaddr_t iobase1 = chan_gf->iobase1;
855 int status = powerup_await_non_bsy(iobase1);
856 if (status < 0)
857 continue;
858 u8 newdh = slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0;
859 outb(newdh, iobase1+ATA_CB_DH);
860 ndelay(400);
861 status = powerup_await_non_bsy(iobase1);
862 if (status < 0)
863 continue;
864
865 // Check if ioport registers look valid.
866 outb(newdh, iobase1+ATA_CB_DH);
867 u8 dh = inb(iobase1+ATA_CB_DH);
868 outb(0x55, iobase1+ATA_CB_SC);
869 outb(0xaa, iobase1+ATA_CB_SN);
870 u8 sc = inb(iobase1+ATA_CB_SC);
871 u8 sn = inb(iobase1+ATA_CB_SN);
872 dprintf(6, "ata_detect ata%d-%d: sc=%x sn=%x dh=%x\n"
873 , chan_gf->ataid, slave, sc, sn, dh);
874 if (sc != 0x55 || sn != 0xaa || dh != newdh)
875 continue;
876
877 // Prepare new drive.
878 dummy.slave = slave;
879
880 // reset the channel
881 if (!didreset) {
882 ata_reset(&dummy);
883 didreset = 1;
884 }
885
886 // check for ATAPI
887 u16 buffer[256];
888 struct atadrive_s *adrive = init_drive_atapi(&dummy, buffer);
889 if (!adrive) {
890 // Didn't find an ATAPI drive - look for ATA drive.
891 u8 st = inb(iobase1+ATA_CB_STAT);
892 if (!st)
893 // Status not set - can't be a valid drive.
894 continue;
895
896 // Wait for RDY.
897 int ret = await_rdy(iobase1);
898 if (ret < 0)
899 continue;
900
901 // check for ATA.
902 adrive = init_drive_ata(&dummy, buffer);
903 if (!adrive)
904 // No ATA drive found
905 continue;
906 }
907
908 u16 resetresult = le16_to_cpu(buffer[93]);
909 dprintf(6, "ata_detect resetresult=%04x\n", resetresult);
910 if (!slave && (resetresult & 0xdf61) == 0x4041)
911 // resetresult looks valid and device 0 is responding to
912 // device 1 requests - device 1 must not be present - skip
913 // detection.
914 break;
915 }
916 }
917
918 // Initialize an ata controller and detect its drives.
919 static void
init_controller(struct pci_device * pci,int chanid,int irq,u32 port1,u32 port2,u32 master)920 init_controller(struct pci_device *pci, int chanid, int irq
921 , u32 port1, u32 port2, u32 master)
922 {
923 static int ataid = 0;
924 struct ata_channel_s *chan_gf = malloc_fseg(sizeof(*chan_gf));
925 if (!chan_gf) {
926 warn_noalloc();
927 return;
928 }
929 chan_gf->ataid = ataid++;
930 chan_gf->chanid = chanid;
931 chan_gf->irq = irq;
932 chan_gf->pci_bdf = pci ? pci->bdf : -1;
933 chan_gf->pci_tmp = pci;
934 chan_gf->iobase1 = port1;
935 chan_gf->iobase2 = port2;
936 chan_gf->iomaster = master;
937 dprintf(1, "ATA controller %d at %x/%x/%x (irq %d dev %x)\n"
938 , ataid, port1, port2, master, irq, chan_gf->pci_bdf);
939 run_thread(ata_detect, chan_gf);
940 }
941
942 #define IRQ_ATA1 14
943 #define IRQ_ATA2 15
944
945 // Handle controllers on an ATA PCI device.
946 static void
init_pciata(struct pci_device * pci,u8 prog_if)947 init_pciata(struct pci_device *pci, u8 prog_if)
948 {
949 u8 pciirq = pci_config_readb(pci->bdf, PCI_INTERRUPT_LINE);
950 int master = 0;
951 if (CONFIG_ATA_DMA && prog_if & 0x80) {
952 // Check for bus-mastering.
953 u32 bar = pci_config_readl(pci->bdf, PCI_BASE_ADDRESS_4);
954 if (bar & PCI_BASE_ADDRESS_SPACE_IO) {
955 master = pci_enable_iobar(pci, PCI_BASE_ADDRESS_4);
956 pci_enable_busmaster(pci);
957 }
958 }
959
960 u32 port1, port2, irq;
961 if (prog_if & 1) {
962 port1 = pci_enable_iobar(pci, PCI_BASE_ADDRESS_0);
963 port2 = pci_enable_iobar(pci, PCI_BASE_ADDRESS_1);
964 if (!port1 || !port2)
965 return;
966 irq = pciirq;
967 } else {
968 port1 = PORT_ATA1_CMD_BASE;
969 port2 = PORT_ATA1_CTRL_BASE;
970 irq = IRQ_ATA1;
971 }
972 init_controller(pci, 0, irq, port1, port2, master);
973
974 if (prog_if & 4) {
975 port1 = pci_enable_iobar(pci, PCI_BASE_ADDRESS_2);
976 port2 = pci_enable_iobar(pci, PCI_BASE_ADDRESS_3);
977 if (!port1 || !port2)
978 return;
979 irq = pciirq;
980 } else {
981 port1 = PORT_ATA2_CMD_BASE;
982 port2 = PORT_ATA2_CTRL_BASE;
983 irq = IRQ_ATA2;
984 }
985 init_controller(pci, 1, irq, port1, port2, master ? master + 8 : 0);
986 }
987
988 static void
found_genericata(struct pci_device * pci,void * arg)989 found_genericata(struct pci_device *pci, void *arg)
990 {
991 init_pciata(pci, pci->prog_if);
992 }
993
994 static void
found_compatibleahci(struct pci_device * pci,void * arg)995 found_compatibleahci(struct pci_device *pci, void *arg)
996 {
997 if (CONFIG_AHCI)
998 // Already handled directly via native ahci interface.
999 return;
1000 init_pciata(pci, 0x8f);
1001 }
1002
1003 static const struct pci_device_id pci_ata_tbl[] = {
1004 PCI_DEVICE_CLASS(PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE
1005 , found_genericata),
1006 PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4391, found_compatibleahci),
1007 PCI_DEVICE_END,
1008 };
1009
1010 // Locate and init ata controllers.
1011 static void
ata_scan(void)1012 ata_scan(void)
1013 {
1014 if (CONFIG_QEMU && hlist_empty(&PCIDevices)) {
1015 // No PCI devices found - probably a QEMU "-M isapc" machine.
1016 // Try using ISA ports for ATA controllers.
1017 init_controller(NULL, 0, IRQ_ATA1
1018 , PORT_ATA1_CMD_BASE, PORT_ATA1_CTRL_BASE, 0);
1019 init_controller(NULL, 1, IRQ_ATA2
1020 , PORT_ATA2_CMD_BASE, PORT_ATA2_CTRL_BASE, 0);
1021 return;
1022 }
1023
1024 // Scan PCI bus for ATA adapters
1025 struct pci_device *pci;
1026 foreachpci(pci) {
1027 pci_init_device(pci_ata_tbl, pci, NULL);
1028 }
1029 }
1030
1031 void
ata_setup(void)1032 ata_setup(void)
1033 {
1034 ASSERT32FLAT();
1035 if (!CONFIG_ATA)
1036 return;
1037
1038 dprintf(0, "init hard drives\n");
1039
1040 SpinupEnd = timer_calc(IDE_TIMEOUT);
1041 ata_scan();
1042
1043 SET_BDA(disk_control_byte, 0xc0);
1044
1045 enable_hwirq(14, FUNC16(entry_76));
1046 }
1047