ahci: factor out FIS decomposition from handle_cmd
[qemu.git] / hw / ide / ahci.c
1 /*
2 * QEMU AHCI Emulation
3 *
4 * Copyright (c) 2010 qiaochong@loongson.cn
5 * Copyright (c) 2010 Roland Elek <elek.roland@gmail.com>
6 * Copyright (c) 2010 Sebastian Herbszt <herbszt@gmx.de>
7 * Copyright (c) 2010 Alexander Graf <agraf@suse.de>
8 *
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2 of the License, or (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
21 *
22 */
23
24 #include <hw/hw.h>
25 #include <hw/pci/msi.h>
26 #include <hw/i386/pc.h>
27 #include <hw/pci/pci.h>
28 #include <hw/sysbus.h>
29
30 #include "monitor/monitor.h"
31 #include "sysemu/block-backend.h"
32 #include "sysemu/dma.h"
33 #include "internal.h"
34 #include <hw/ide/pci.h>
35 #include <hw/ide/ahci.h>
36
37 /* #define DEBUG_AHCI */
38
39 #ifdef DEBUG_AHCI
40 #define DPRINTF(port, fmt, ...) \
41 do { fprintf(stderr, "ahci: %s: [%d] ", __FUNCTION__, port); \
42 fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
43 #else
44 #define DPRINTF(port, fmt, ...) do {} while(0)
45 #endif
46
47 static void check_cmd(AHCIState *s, int port);
48 static int handle_cmd(AHCIState *s,int port,int slot);
49 static void ahci_reset_port(AHCIState *s, int port);
50 static void ahci_write_fis_d2h(AHCIDevice *ad, uint8_t *cmd_fis);
51 static void ahci_init_d2h(AHCIDevice *ad);
52 static int ahci_dma_prepare_buf(IDEDMA *dma, int is_write);
53 static void ahci_commit_buf(IDEDMA *dma, uint32_t tx_bytes);
54
55
56 static uint32_t ahci_port_read(AHCIState *s, int port, int offset)
57 {
58 uint32_t val;
59 AHCIPortRegs *pr;
60 pr = &s->dev[port].port_regs;
61
62 switch (offset) {
63 case PORT_LST_ADDR:
64 val = pr->lst_addr;
65 break;
66 case PORT_LST_ADDR_HI:
67 val = pr->lst_addr_hi;
68 break;
69 case PORT_FIS_ADDR:
70 val = pr->fis_addr;
71 break;
72 case PORT_FIS_ADDR_HI:
73 val = pr->fis_addr_hi;
74 break;
75 case PORT_IRQ_STAT:
76 val = pr->irq_stat;
77 break;
78 case PORT_IRQ_MASK:
79 val = pr->irq_mask;
80 break;
81 case PORT_CMD:
82 val = pr->cmd;
83 break;
84 case PORT_TFDATA:
85 val = pr->tfdata;
86 break;
87 case PORT_SIG:
88 val = pr->sig;
89 break;
90 case PORT_SCR_STAT:
91 if (s->dev[port].port.ifs[0].blk) {
92 val = SATA_SCR_SSTATUS_DET_DEV_PRESENT_PHY_UP |
93 SATA_SCR_SSTATUS_SPD_GEN1 | SATA_SCR_SSTATUS_IPM_ACTIVE;
94 } else {
95 val = SATA_SCR_SSTATUS_DET_NODEV;
96 }
97 break;
98 case PORT_SCR_CTL:
99 val = pr->scr_ctl;
100 break;
101 case PORT_SCR_ERR:
102 val = pr->scr_err;
103 break;
104 case PORT_SCR_ACT:
105 pr->scr_act &= ~s->dev[port].finished;
106 s->dev[port].finished = 0;
107 val = pr->scr_act;
108 break;
109 case PORT_CMD_ISSUE:
110 val = pr->cmd_issue;
111 break;
112 case PORT_RESERVED:
113 default:
114 val = 0;
115 }
116 DPRINTF(port, "offset: 0x%x val: 0x%x\n", offset, val);
117 return val;
118
119 }
120
121 static void ahci_irq_raise(AHCIState *s, AHCIDevice *dev)
122 {
123 AHCIPCIState *d = container_of(s, AHCIPCIState, ahci);
124 PCIDevice *pci_dev =
125 (PCIDevice *)object_dynamic_cast(OBJECT(d), TYPE_PCI_DEVICE);
126
127 DPRINTF(0, "raise irq\n");
128
129 if (pci_dev && msi_enabled(pci_dev)) {
130 msi_notify(pci_dev, 0);
131 } else {
132 qemu_irq_raise(s->irq);
133 }
134 }
135
136 static void ahci_irq_lower(AHCIState *s, AHCIDevice *dev)
137 {
138 AHCIPCIState *d = container_of(s, AHCIPCIState, ahci);
139 PCIDevice *pci_dev =
140 (PCIDevice *)object_dynamic_cast(OBJECT(d), TYPE_PCI_DEVICE);
141
142 DPRINTF(0, "lower irq\n");
143
144 if (!pci_dev || !msi_enabled(pci_dev)) {
145 qemu_irq_lower(s->irq);
146 }
147 }
148
149 static void ahci_check_irq(AHCIState *s)
150 {
151 int i;
152
153 DPRINTF(-1, "check irq %#x\n", s->control_regs.irqstatus);
154
155 s->control_regs.irqstatus = 0;
156 for (i = 0; i < s->ports; i++) {
157 AHCIPortRegs *pr = &s->dev[i].port_regs;
158 if (pr->irq_stat & pr->irq_mask) {
159 s->control_regs.irqstatus |= (1 << i);
160 }
161 }
162
163 if (s->control_regs.irqstatus &&
164 (s->control_regs.ghc & HOST_CTL_IRQ_EN)) {
165 ahci_irq_raise(s, NULL);
166 } else {
167 ahci_irq_lower(s, NULL);
168 }
169 }
170
171 static void ahci_trigger_irq(AHCIState *s, AHCIDevice *d,
172 int irq_type)
173 {
174 DPRINTF(d->port_no, "trigger irq %#x -> %x\n",
175 irq_type, d->port_regs.irq_mask & irq_type);
176
177 d->port_regs.irq_stat |= irq_type;
178 ahci_check_irq(s);
179 }
180
181 static void map_page(AddressSpace *as, uint8_t **ptr, uint64_t addr,
182 uint32_t wanted)
183 {
184 hwaddr len = wanted;
185
186 if (*ptr) {
187 dma_memory_unmap(as, *ptr, len, DMA_DIRECTION_FROM_DEVICE, len);
188 }
189
190 *ptr = dma_memory_map(as, addr, &len, DMA_DIRECTION_FROM_DEVICE);
191 if (len < wanted) {
192 dma_memory_unmap(as, *ptr, len, DMA_DIRECTION_FROM_DEVICE, len);
193 *ptr = NULL;
194 }
195 }
196
197 static void ahci_port_write(AHCIState *s, int port, int offset, uint32_t val)
198 {
199 AHCIPortRegs *pr = &s->dev[port].port_regs;
200
201 DPRINTF(port, "offset: 0x%x val: 0x%x\n", offset, val);
202 switch (offset) {
203 case PORT_LST_ADDR:
204 pr->lst_addr = val;
205 map_page(s->as, &s->dev[port].lst,
206 ((uint64_t)pr->lst_addr_hi << 32) | pr->lst_addr, 1024);
207 s->dev[port].cur_cmd = NULL;
208 break;
209 case PORT_LST_ADDR_HI:
210 pr->lst_addr_hi = val;
211 map_page(s->as, &s->dev[port].lst,
212 ((uint64_t)pr->lst_addr_hi << 32) | pr->lst_addr, 1024);
213 s->dev[port].cur_cmd = NULL;
214 break;
215 case PORT_FIS_ADDR:
216 pr->fis_addr = val;
217 map_page(s->as, &s->dev[port].res_fis,
218 ((uint64_t)pr->fis_addr_hi << 32) | pr->fis_addr, 256);
219 break;
220 case PORT_FIS_ADDR_HI:
221 pr->fis_addr_hi = val;
222 map_page(s->as, &s->dev[port].res_fis,
223 ((uint64_t)pr->fis_addr_hi << 32) | pr->fis_addr, 256);
224 break;
225 case PORT_IRQ_STAT:
226 pr->irq_stat &= ~val;
227 ahci_check_irq(s);
228 break;
229 case PORT_IRQ_MASK:
230 pr->irq_mask = val & 0xfdc000ff;
231 ahci_check_irq(s);
232 break;
233 case PORT_CMD:
234 pr->cmd = val & ~(PORT_CMD_LIST_ON | PORT_CMD_FIS_ON);
235
236 if (pr->cmd & PORT_CMD_START) {
237 pr->cmd |= PORT_CMD_LIST_ON;
238 }
239
240 if (pr->cmd & PORT_CMD_FIS_RX) {
241 pr->cmd |= PORT_CMD_FIS_ON;
242 }
243
244 /* XXX usually the FIS would be pending on the bus here and
245 issuing deferred until the OS enables FIS receival.
246 Instead, we only submit it once - which works in most
247 cases, but is a hack. */
248 if ((pr->cmd & PORT_CMD_FIS_ON) &&
249 !s->dev[port].init_d2h_sent) {
250 ahci_init_d2h(&s->dev[port]);
251 s->dev[port].init_d2h_sent = true;
252 }
253
254 check_cmd(s, port);
255 break;
256 case PORT_TFDATA:
257 /* Read Only. */
258 break;
259 case PORT_SIG:
260 /* Read Only */
261 break;
262 case PORT_SCR_STAT:
263 /* Read Only */
264 break;
265 case PORT_SCR_CTL:
266 if (((pr->scr_ctl & AHCI_SCR_SCTL_DET) == 1) &&
267 ((val & AHCI_SCR_SCTL_DET) == 0)) {
268 ahci_reset_port(s, port);
269 }
270 pr->scr_ctl = val;
271 break;
272 case PORT_SCR_ERR:
273 pr->scr_err &= ~val;
274 break;
275 case PORT_SCR_ACT:
276 /* RW1 */
277 pr->scr_act |= val;
278 break;
279 case PORT_CMD_ISSUE:
280 pr->cmd_issue |= val;
281 check_cmd(s, port);
282 break;
283 default:
284 break;
285 }
286 }
287
288 static uint64_t ahci_mem_read(void *opaque, hwaddr addr,
289 unsigned size)
290 {
291 AHCIState *s = opaque;
292 uint32_t val = 0;
293
294 if (addr < AHCI_GENERIC_HOST_CONTROL_REGS_MAX_ADDR) {
295 switch (addr) {
296 case HOST_CAP:
297 val = s->control_regs.cap;
298 break;
299 case HOST_CTL:
300 val = s->control_regs.ghc;
301 break;
302 case HOST_IRQ_STAT:
303 val = s->control_regs.irqstatus;
304 break;
305 case HOST_PORTS_IMPL:
306 val = s->control_regs.impl;
307 break;
308 case HOST_VERSION:
309 val = s->control_regs.version;
310 break;
311 }
312
313 DPRINTF(-1, "(addr 0x%08X), val 0x%08X\n", (unsigned) addr, val);
314 } else if ((addr >= AHCI_PORT_REGS_START_ADDR) &&
315 (addr < (AHCI_PORT_REGS_START_ADDR +
316 (s->ports * AHCI_PORT_ADDR_OFFSET_LEN)))) {
317 val = ahci_port_read(s, (addr - AHCI_PORT_REGS_START_ADDR) >> 7,
318 addr & AHCI_PORT_ADDR_OFFSET_MASK);
319 }
320
321 return val;
322 }
323
324
325
326 static void ahci_mem_write(void *opaque, hwaddr addr,
327 uint64_t val, unsigned size)
328 {
329 AHCIState *s = opaque;
330
331 /* Only aligned reads are allowed on AHCI */
332 if (addr & 3) {
333 fprintf(stderr, "ahci: Mis-aligned write to addr 0x"
334 TARGET_FMT_plx "\n", addr);
335 return;
336 }
337
338 if (addr < AHCI_GENERIC_HOST_CONTROL_REGS_MAX_ADDR) {
339 DPRINTF(-1, "(addr 0x%08X), val 0x%08"PRIX64"\n", (unsigned) addr, val);
340
341 switch (addr) {
342 case HOST_CAP: /* R/WO, RO */
343 /* FIXME handle R/WO */
344 break;
345 case HOST_CTL: /* R/W */
346 if (val & HOST_CTL_RESET) {
347 DPRINTF(-1, "HBA Reset\n");
348 ahci_reset(s);
349 } else {
350 s->control_regs.ghc = (val & 0x3) | HOST_CTL_AHCI_EN;
351 ahci_check_irq(s);
352 }
353 break;
354 case HOST_IRQ_STAT: /* R/WC, RO */
355 s->control_regs.irqstatus &= ~val;
356 ahci_check_irq(s);
357 break;
358 case HOST_PORTS_IMPL: /* R/WO, RO */
359 /* FIXME handle R/WO */
360 break;
361 case HOST_VERSION: /* RO */
362 /* FIXME report write? */
363 break;
364 default:
365 DPRINTF(-1, "write to unknown register 0x%x\n", (unsigned)addr);
366 }
367 } else if ((addr >= AHCI_PORT_REGS_START_ADDR) &&
368 (addr < (AHCI_PORT_REGS_START_ADDR +
369 (s->ports * AHCI_PORT_ADDR_OFFSET_LEN)))) {
370 ahci_port_write(s, (addr - AHCI_PORT_REGS_START_ADDR) >> 7,
371 addr & AHCI_PORT_ADDR_OFFSET_MASK, val);
372 }
373
374 }
375
376 static const MemoryRegionOps ahci_mem_ops = {
377 .read = ahci_mem_read,
378 .write = ahci_mem_write,
379 .endianness = DEVICE_LITTLE_ENDIAN,
380 };
381
382 static uint64_t ahci_idp_read(void *opaque, hwaddr addr,
383 unsigned size)
384 {
385 AHCIState *s = opaque;
386
387 if (addr == s->idp_offset) {
388 /* index register */
389 return s->idp_index;
390 } else if (addr == s->idp_offset + 4) {
391 /* data register - do memory read at location selected by index */
392 return ahci_mem_read(opaque, s->idp_index, size);
393 } else {
394 return 0;
395 }
396 }
397
398 static void ahci_idp_write(void *opaque, hwaddr addr,
399 uint64_t val, unsigned size)
400 {
401 AHCIState *s = opaque;
402
403 if (addr == s->idp_offset) {
404 /* index register - mask off reserved bits */
405 s->idp_index = (uint32_t)val & ((AHCI_MEM_BAR_SIZE - 1) & ~3);
406 } else if (addr == s->idp_offset + 4) {
407 /* data register - do memory write at location selected by index */
408 ahci_mem_write(opaque, s->idp_index, val, size);
409 }
410 }
411
412 static const MemoryRegionOps ahci_idp_ops = {
413 .read = ahci_idp_read,
414 .write = ahci_idp_write,
415 .endianness = DEVICE_LITTLE_ENDIAN,
416 };
417
418
419 static void ahci_reg_init(AHCIState *s)
420 {
421 int i;
422
423 s->control_regs.cap = (s->ports - 1) |
424 (AHCI_NUM_COMMAND_SLOTS << 8) |
425 (AHCI_SUPPORTED_SPEED_GEN1 << AHCI_SUPPORTED_SPEED) |
426 HOST_CAP_NCQ | HOST_CAP_AHCI;
427
428 s->control_regs.impl = (1 << s->ports) - 1;
429
430 s->control_regs.version = AHCI_VERSION_1_0;
431
432 for (i = 0; i < s->ports; i++) {
433 s->dev[i].port_state = STATE_RUN;
434 }
435 }
436
437 static void check_cmd(AHCIState *s, int port)
438 {
439 AHCIPortRegs *pr = &s->dev[port].port_regs;
440 int slot;
441
442 if ((pr->cmd & PORT_CMD_START) && pr->cmd_issue) {
443 for (slot = 0; (slot < 32) && pr->cmd_issue; slot++) {
444 if ((pr->cmd_issue & (1U << slot)) &&
445 !handle_cmd(s, port, slot)) {
446 pr->cmd_issue &= ~(1U << slot);
447 }
448 }
449 }
450 }
451
452 static void ahci_check_cmd_bh(void *opaque)
453 {
454 AHCIDevice *ad = opaque;
455
456 qemu_bh_delete(ad->check_bh);
457 ad->check_bh = NULL;
458
459 if ((ad->busy_slot != -1) &&
460 !(ad->port.ifs[0].status & (BUSY_STAT|DRQ_STAT))) {
461 /* no longer busy */
462 ad->port_regs.cmd_issue &= ~(1 << ad->busy_slot);
463 ad->busy_slot = -1;
464 }
465
466 check_cmd(ad->hba, ad->port_no);
467 }
468
469 static void ahci_init_d2h(AHCIDevice *ad)
470 {
471 uint8_t init_fis[20];
472 IDEState *ide_state = &ad->port.ifs[0];
473
474 memset(init_fis, 0, sizeof(init_fis));
475
476 init_fis[4] = 1;
477 init_fis[12] = 1;
478
479 if (ide_state->drive_kind == IDE_CD) {
480 init_fis[5] = ide_state->lcyl;
481 init_fis[6] = ide_state->hcyl;
482 }
483
484 ahci_write_fis_d2h(ad, init_fis);
485 }
486
487 static void ahci_reset_port(AHCIState *s, int port)
488 {
489 AHCIDevice *d = &s->dev[port];
490 AHCIPortRegs *pr = &d->port_regs;
491 IDEState *ide_state = &d->port.ifs[0];
492 int i;
493
494 DPRINTF(port, "reset port\n");
495
496 ide_bus_reset(&d->port);
497 ide_state->ncq_queues = AHCI_MAX_CMDS;
498
499 pr->scr_stat = 0;
500 pr->scr_err = 0;
501 pr->scr_act = 0;
502 pr->tfdata = 0x7F;
503 pr->sig = 0xFFFFFFFF;
504 d->busy_slot = -1;
505 d->init_d2h_sent = false;
506
507 ide_state = &s->dev[port].port.ifs[0];
508 if (!ide_state->blk) {
509 return;
510 }
511
512 /* reset ncq queue */
513 for (i = 0; i < AHCI_MAX_CMDS; i++) {
514 NCQTransferState *ncq_tfs = &s->dev[port].ncq_tfs[i];
515 if (!ncq_tfs->used) {
516 continue;
517 }
518
519 if (ncq_tfs->aiocb) {
520 blk_aio_cancel(ncq_tfs->aiocb);
521 ncq_tfs->aiocb = NULL;
522 }
523
524 /* Maybe we just finished the request thanks to blk_aio_cancel() */
525 if (!ncq_tfs->used) {
526 continue;
527 }
528
529 qemu_sglist_destroy(&ncq_tfs->sglist);
530 ncq_tfs->used = 0;
531 }
532
533 s->dev[port].port_state = STATE_RUN;
534 if (!ide_state->blk) {
535 pr->sig = 0;
536 ide_state->status = SEEK_STAT | WRERR_STAT;
537 } else if (ide_state->drive_kind == IDE_CD) {
538 pr->sig = SATA_SIGNATURE_CDROM;
539 ide_state->lcyl = 0x14;
540 ide_state->hcyl = 0xeb;
541 DPRINTF(port, "set lcyl = %d\n", ide_state->lcyl);
542 ide_state->status = SEEK_STAT | WRERR_STAT | READY_STAT;
543 } else {
544 pr->sig = SATA_SIGNATURE_DISK;
545 ide_state->status = SEEK_STAT | WRERR_STAT;
546 }
547
548 ide_state->error = 1;
549 ahci_init_d2h(d);
550 }
551
552 static void debug_print_fis(uint8_t *fis, int cmd_len)
553 {
554 #ifdef DEBUG_AHCI
555 int i;
556
557 fprintf(stderr, "fis:");
558 for (i = 0; i < cmd_len; i++) {
559 if ((i & 0xf) == 0) {
560 fprintf(stderr, "\n%02x:",i);
561 }
562 fprintf(stderr, "%02x ",fis[i]);
563 }
564 fprintf(stderr, "\n");
565 #endif
566 }
567
568 static void ahci_write_fis_sdb(AHCIState *s, int port, uint32_t finished)
569 {
570 AHCIDevice *ad = &s->dev[port];
571 AHCIPortRegs *pr = &ad->port_regs;
572 IDEState *ide_state;
573 SDBFIS *sdb_fis;
574
575 if (!s->dev[port].res_fis ||
576 !(pr->cmd & PORT_CMD_FIS_RX)) {
577 return;
578 }
579
580 sdb_fis = (SDBFIS *)&ad->res_fis[RES_FIS_SDBFIS];
581 ide_state = &ad->port.ifs[0];
582
583 sdb_fis->type = 0xA1;
584 /* Interrupt pending & Notification bit */
585 sdb_fis->flags = (ad->hba->control_regs.irqstatus ? (1 << 6) : 0);
586 sdb_fis->status = ide_state->status & 0x77;
587 sdb_fis->error = ide_state->error;
588 /* update SAct field in SDB_FIS */
589 s->dev[port].finished |= finished;
590 sdb_fis->payload = cpu_to_le32(ad->finished);
591
592 /* Update shadow registers (except BSY 0x80 and DRQ 0x08) */
593 pr->tfdata = (ad->port.ifs[0].error << 8) |
594 (ad->port.ifs[0].status & 0x77) |
595 (pr->tfdata & 0x88);
596
597 ahci_trigger_irq(s, ad, PORT_IRQ_SDB_FIS);
598 }
599
600 static void ahci_write_fis_pio(AHCIDevice *ad, uint16_t len)
601 {
602 AHCIPortRegs *pr = &ad->port_regs;
603 uint8_t *pio_fis, *cmd_fis;
604 uint64_t tbl_addr;
605 dma_addr_t cmd_len = 0x80;
606 IDEState *s = &ad->port.ifs[0];
607
608 if (!ad->res_fis || !(pr->cmd & PORT_CMD_FIS_RX)) {
609 return;
610 }
611
612 /* map cmd_fis */
613 tbl_addr = le64_to_cpu(ad->cur_cmd->tbl_addr);
614 cmd_fis = dma_memory_map(ad->hba->as, tbl_addr, &cmd_len,
615 DMA_DIRECTION_TO_DEVICE);
616
617 if (cmd_fis == NULL) {
618 DPRINTF(ad->port_no, "dma_memory_map failed in ahci_write_fis_pio");
619 ahci_trigger_irq(ad->hba, ad, PORT_IRQ_HBUS_ERR);
620 return;
621 }
622
623 if (cmd_len != 0x80) {
624 DPRINTF(ad->port_no,
625 "dma_memory_map mapped too few bytes in ahci_write_fis_pio");
626 dma_memory_unmap(ad->hba->as, cmd_fis, cmd_len,
627 DMA_DIRECTION_TO_DEVICE, cmd_len);
628 ahci_trigger_irq(ad->hba, ad, PORT_IRQ_HBUS_ERR);
629 return;
630 }
631
632 pio_fis = &ad->res_fis[RES_FIS_PSFIS];
633
634 pio_fis[0] = 0x5f;
635 pio_fis[1] = (ad->hba->control_regs.irqstatus ? (1 << 6) : 0);
636 pio_fis[2] = s->status;
637 pio_fis[3] = s->error;
638
639 pio_fis[4] = s->sector;
640 pio_fis[5] = s->lcyl;
641 pio_fis[6] = s->hcyl;
642 pio_fis[7] = s->select;
643 pio_fis[8] = s->hob_sector;
644 pio_fis[9] = s->hob_lcyl;
645 pio_fis[10] = s->hob_hcyl;
646 pio_fis[11] = 0;
647 pio_fis[12] = cmd_fis[12];
648 pio_fis[13] = cmd_fis[13];
649 pio_fis[14] = 0;
650 pio_fis[15] = s->status;
651 pio_fis[16] = len & 255;
652 pio_fis[17] = len >> 8;
653 pio_fis[18] = 0;
654 pio_fis[19] = 0;
655
656 /* Update shadow registers: */
657 pr->tfdata = (ad->port.ifs[0].error << 8) |
658 ad->port.ifs[0].status;
659
660 if (pio_fis[2] & ERR_STAT) {
661 ahci_trigger_irq(ad->hba, ad, PORT_IRQ_TF_ERR);
662 }
663
664 ahci_trigger_irq(ad->hba, ad, PORT_IRQ_PIOS_FIS);
665
666 dma_memory_unmap(ad->hba->as, cmd_fis, cmd_len,
667 DMA_DIRECTION_TO_DEVICE, cmd_len);
668 }
669
670 static void ahci_write_fis_d2h(AHCIDevice *ad, uint8_t *cmd_fis)
671 {
672 AHCIPortRegs *pr = &ad->port_regs;
673 uint8_t *d2h_fis;
674 int i;
675 dma_addr_t cmd_len = 0x80;
676 int cmd_mapped = 0;
677 IDEState *s = &ad->port.ifs[0];
678
679 if (!ad->res_fis || !(pr->cmd & PORT_CMD_FIS_RX)) {
680 return;
681 }
682
683 if (!cmd_fis) {
684 /* map cmd_fis */
685 uint64_t tbl_addr = le64_to_cpu(ad->cur_cmd->tbl_addr);
686 cmd_fis = dma_memory_map(ad->hba->as, tbl_addr, &cmd_len,
687 DMA_DIRECTION_TO_DEVICE);
688 cmd_mapped = 1;
689 }
690
691 d2h_fis = &ad->res_fis[RES_FIS_RFIS];
692
693 d2h_fis[0] = 0x34;
694 d2h_fis[1] = (ad->hba->control_regs.irqstatus ? (1 << 6) : 0);
695 d2h_fis[2] = s->status;
696 d2h_fis[3] = s->error;
697
698 d2h_fis[4] = s->sector;
699 d2h_fis[5] = s->lcyl;
700 d2h_fis[6] = s->hcyl;
701 d2h_fis[7] = s->select;
702 d2h_fis[8] = s->hob_sector;
703 d2h_fis[9] = s->hob_lcyl;
704 d2h_fis[10] = s->hob_hcyl;
705 d2h_fis[11] = 0;
706 d2h_fis[12] = cmd_fis[12];
707 d2h_fis[13] = cmd_fis[13];
708 for (i = 14; i < 20; i++) {
709 d2h_fis[i] = 0;
710 }
711
712 /* Update shadow registers: */
713 pr->tfdata = (ad->port.ifs[0].error << 8) |
714 ad->port.ifs[0].status;
715
716 if (d2h_fis[2] & ERR_STAT) {
717 ahci_trigger_irq(ad->hba, ad, PORT_IRQ_TF_ERR);
718 }
719
720 ahci_trigger_irq(ad->hba, ad, PORT_IRQ_D2H_REG_FIS);
721
722 if (cmd_mapped) {
723 dma_memory_unmap(ad->hba->as, cmd_fis, cmd_len,
724 DMA_DIRECTION_TO_DEVICE, cmd_len);
725 }
726 }
727
728 static int prdt_tbl_entry_size(const AHCI_SG *tbl)
729 {
730 return (le32_to_cpu(tbl->flags_size) & AHCI_PRDT_SIZE_MASK) + 1;
731 }
732
733 static int ahci_populate_sglist(AHCIDevice *ad, QEMUSGList *sglist,
734 int32_t offset)
735 {
736 AHCICmdHdr *cmd = ad->cur_cmd;
737 uint32_t opts = le32_to_cpu(cmd->opts);
738 uint64_t prdt_addr = le64_to_cpu(cmd->tbl_addr) + 0x80;
739 int sglist_alloc_hint = opts >> AHCI_CMD_HDR_PRDT_LEN;
740 dma_addr_t prdt_len = (sglist_alloc_hint * sizeof(AHCI_SG));
741 dma_addr_t real_prdt_len = prdt_len;
742 uint8_t *prdt;
743 int i;
744 int r = 0;
745 uint64_t sum = 0;
746 int off_idx = -1;
747 int64_t off_pos = -1;
748 int tbl_entry_size;
749 IDEBus *bus = &ad->port;
750 BusState *qbus = BUS(bus);
751
752 /*
753 * Note: AHCI PRDT can describe up to 256GiB. SATA/ATA only support
754 * transactions of up to 32MiB as of ATA8-ACS3 rev 1b, assuming a
755 * 512 byte sector size. We limit the PRDT in this implementation to
756 * a reasonably large 2GiB, which can accommodate the maximum transfer
757 * request for sector sizes up to 32K.
758 */
759
760 if (!sglist_alloc_hint) {
761 DPRINTF(ad->port_no, "no sg list given by guest: 0x%08x\n", opts);
762 return -1;
763 }
764
765 /* map PRDT */
766 if (!(prdt = dma_memory_map(ad->hba->as, prdt_addr, &prdt_len,
767 DMA_DIRECTION_TO_DEVICE))){
768 DPRINTF(ad->port_no, "map failed\n");
769 return -1;
770 }
771
772 if (prdt_len < real_prdt_len) {
773 DPRINTF(ad->port_no, "mapped less than expected\n");
774 r = -1;
775 goto out;
776 }
777
778 /* Get entries in the PRDT, init a qemu sglist accordingly */
779 if (sglist_alloc_hint > 0) {
780 AHCI_SG *tbl = (AHCI_SG *)prdt;
781 sum = 0;
782 for (i = 0; i < sglist_alloc_hint; i++) {
783 /* flags_size is zero-based */
784 tbl_entry_size = prdt_tbl_entry_size(&tbl[i]);
785 if (offset <= (sum + tbl_entry_size)) {
786 off_idx = i;
787 off_pos = offset - sum;
788 break;
789 }
790 sum += tbl_entry_size;
791 }
792 if ((off_idx == -1) || (off_pos < 0) || (off_pos > tbl_entry_size)) {
793 DPRINTF(ad->port_no, "%s: Incorrect offset! "
794 "off_idx: %d, off_pos: %"PRId64"\n",
795 __func__, off_idx, off_pos);
796 r = -1;
797 goto out;
798 }
799
800 qemu_sglist_init(sglist, qbus->parent, (sglist_alloc_hint - off_idx),
801 ad->hba->as);
802 qemu_sglist_add(sglist, le64_to_cpu(tbl[off_idx].addr + off_pos),
803 prdt_tbl_entry_size(&tbl[off_idx]) - off_pos);
804
805 for (i = off_idx + 1; i < sglist_alloc_hint; i++) {
806 /* flags_size is zero-based */
807 qemu_sglist_add(sglist, le64_to_cpu(tbl[i].addr),
808 prdt_tbl_entry_size(&tbl[i]));
809 if (sglist->size > INT32_MAX) {
810 error_report("AHCI Physical Region Descriptor Table describes "
811 "more than 2 GiB.\n");
812 qemu_sglist_destroy(sglist);
813 r = -1;
814 goto out;
815 }
816 }
817 }
818
819 out:
820 dma_memory_unmap(ad->hba->as, prdt, prdt_len,
821 DMA_DIRECTION_TO_DEVICE, prdt_len);
822 return r;
823 }
824
825 static void ncq_cb(void *opaque, int ret)
826 {
827 NCQTransferState *ncq_tfs = (NCQTransferState *)opaque;
828 IDEState *ide_state = &ncq_tfs->drive->port.ifs[0];
829
830 if (ret == -ECANCELED) {
831 return;
832 }
833 /* Clear bit for this tag in SActive */
834 ncq_tfs->drive->port_regs.scr_act &= ~(1 << ncq_tfs->tag);
835
836 if (ret < 0) {
837 /* error */
838 ide_state->error = ABRT_ERR;
839 ide_state->status = READY_STAT | ERR_STAT;
840 ncq_tfs->drive->port_regs.scr_err |= (1 << ncq_tfs->tag);
841 } else {
842 ide_state->status = READY_STAT | SEEK_STAT;
843 }
844
845 ahci_write_fis_sdb(ncq_tfs->drive->hba, ncq_tfs->drive->port_no,
846 (1 << ncq_tfs->tag));
847
848 DPRINTF(ncq_tfs->drive->port_no, "NCQ transfer tag %d finished\n",
849 ncq_tfs->tag);
850
851 block_acct_done(blk_get_stats(ncq_tfs->drive->port.ifs[0].blk),
852 &ncq_tfs->acct);
853 qemu_sglist_destroy(&ncq_tfs->sglist);
854 ncq_tfs->used = 0;
855 }
856
857 static int is_ncq(uint8_t ata_cmd)
858 {
859 /* Based on SATA 3.2 section 13.6.3.2 */
860 switch (ata_cmd) {
861 case READ_FPDMA_QUEUED:
862 case WRITE_FPDMA_QUEUED:
863 case NCQ_NON_DATA:
864 case RECEIVE_FPDMA_QUEUED:
865 case SEND_FPDMA_QUEUED:
866 return 1;
867 default:
868 return 0;
869 }
870 }
871
872 static void process_ncq_command(AHCIState *s, int port, uint8_t *cmd_fis,
873 int slot)
874 {
875 NCQFrame *ncq_fis = (NCQFrame*)cmd_fis;
876 uint8_t tag = ncq_fis->tag >> 3;
877 NCQTransferState *ncq_tfs = &s->dev[port].ncq_tfs[tag];
878
879 if (ncq_tfs->used) {
880 /* error - already in use */
881 fprintf(stderr, "%s: tag %d already used\n", __FUNCTION__, tag);
882 return;
883 }
884
885 ncq_tfs->used = 1;
886 ncq_tfs->drive = &s->dev[port];
887 ncq_tfs->slot = slot;
888 ncq_tfs->lba = ((uint64_t)ncq_fis->lba5 << 40) |
889 ((uint64_t)ncq_fis->lba4 << 32) |
890 ((uint64_t)ncq_fis->lba3 << 24) |
891 ((uint64_t)ncq_fis->lba2 << 16) |
892 ((uint64_t)ncq_fis->lba1 << 8) |
893 (uint64_t)ncq_fis->lba0;
894
895 /* Note: We calculate the sector count, but don't currently rely on it.
896 * The total size of the DMA buffer tells us the transfer size instead. */
897 ncq_tfs->sector_count = ((uint16_t)ncq_fis->sector_count_high << 8) |
898 ncq_fis->sector_count_low;
899
900 DPRINTF(port, "NCQ transfer LBA from %"PRId64" to %"PRId64", "
901 "drive max %"PRId64"\n",
902 ncq_tfs->lba, ncq_tfs->lba + ncq_tfs->sector_count - 2,
903 s->dev[port].port.ifs[0].nb_sectors - 1);
904
905 ahci_populate_sglist(&s->dev[port], &ncq_tfs->sglist, 0);
906 ncq_tfs->tag = tag;
907
908 switch(ncq_fis->command) {
909 case READ_FPDMA_QUEUED:
910 DPRINTF(port, "NCQ reading %d sectors from LBA %"PRId64", "
911 "tag %d\n",
912 ncq_tfs->sector_count-1, ncq_tfs->lba, ncq_tfs->tag);
913
914 DPRINTF(port, "tag %d aio read %"PRId64"\n",
915 ncq_tfs->tag, ncq_tfs->lba);
916
917 dma_acct_start(ncq_tfs->drive->port.ifs[0].blk, &ncq_tfs->acct,
918 &ncq_tfs->sglist, BLOCK_ACCT_READ);
919 ncq_tfs->aiocb = dma_blk_read(ncq_tfs->drive->port.ifs[0].blk,
920 &ncq_tfs->sglist, ncq_tfs->lba,
921 ncq_cb, ncq_tfs);
922 break;
923 case WRITE_FPDMA_QUEUED:
924 DPRINTF(port, "NCQ writing %d sectors to LBA %"PRId64", tag %d\n",
925 ncq_tfs->sector_count-1, ncq_tfs->lba, ncq_tfs->tag);
926
927 DPRINTF(port, "tag %d aio write %"PRId64"\n",
928 ncq_tfs->tag, ncq_tfs->lba);
929
930 dma_acct_start(ncq_tfs->drive->port.ifs[0].blk, &ncq_tfs->acct,
931 &ncq_tfs->sglist, BLOCK_ACCT_WRITE);
932 ncq_tfs->aiocb = dma_blk_write(ncq_tfs->drive->port.ifs[0].blk,
933 &ncq_tfs->sglist, ncq_tfs->lba,
934 ncq_cb, ncq_tfs);
935 break;
936 default:
937 if (is_ncq(cmd_fis[2])) {
938 DPRINTF(port,
939 "error: unsupported NCQ command (0x%02x) received\n",
940 cmd_fis[2]);
941 } else {
942 DPRINTF(port,
943 "error: tried to process non-NCQ command as NCQ\n");
944 }
945 qemu_sglist_destroy(&ncq_tfs->sglist);
946 }
947 }
948
949 static void handle_reg_h2d_fis(AHCIState *s, int port,
950 int slot, uint8_t *cmd_fis)
951 {
952 IDEState *ide_state = &s->dev[port].port.ifs[0];
953 AHCICmdHdr *cmd = s->dev[port].cur_cmd;
954 uint32_t opts = le32_to_cpu(cmd->opts);
955
956 if (cmd_fis[1] & 0x0F) {
957 DPRINTF(port, "Port Multiplier not supported."
958 " cmd_fis[0]=%02x cmd_fis[1]=%02x cmd_fis[2]=%02x\n",
959 cmd_fis[0], cmd_fis[1], cmd_fis[2]);
960 return;
961 }
962
963 if (cmd_fis[1] & 0x70) {
964 DPRINTF(port, "Reserved flags set in H2D Register FIS."
965 " cmd_fis[0]=%02x cmd_fis[1]=%02x cmd_fis[2]=%02x\n",
966 cmd_fis[0], cmd_fis[1], cmd_fis[2]);
967 return;
968 }
969
970 if (!(cmd_fis[1] & SATA_FIS_REG_H2D_UPDATE_COMMAND_REGISTER)) {
971 switch (s->dev[port].port_state) {
972 case STATE_RUN:
973 if (cmd_fis[15] & ATA_SRST) {
974 s->dev[port].port_state = STATE_RESET;
975 }
976 break;
977 case STATE_RESET:
978 if (!(cmd_fis[15] & ATA_SRST)) {
979 ahci_reset_port(s, port);
980 }
981 break;
982 }
983 return;
984 }
985
986 /* Check for NCQ command */
987 if (is_ncq(cmd_fis[2])) {
988 process_ncq_command(s, port, cmd_fis, slot);
989 return;
990 }
991
992 /* Decompose the FIS:
993 * AHCI does not interpret FIS packets, it only forwards them.
994 * SATA 1.0 describes how to decode LBA28 and CHS FIS packets.
995 * Later specifications, e.g, SATA 3.2, describe LBA48 FIS packets.
996 *
997 * ATA4 describes sector number for LBA28/CHS commands.
998 * ATA6 describes sector number for LBA48 commands.
999 * ATA8 deprecates CHS fully, describing only LBA28/48.
1000 *
1001 * We dutifully convert the FIS into IDE registers, and allow the
1002 * core layer to interpret them as needed. */
1003 ide_state->feature = cmd_fis[3];
1004 ide_state->sector = cmd_fis[4]; /* LBA 7:0 */
1005 ide_state->lcyl = cmd_fis[5]; /* LBA 15:8 */
1006 ide_state->hcyl = cmd_fis[6]; /* LBA 23:16 */
1007 ide_state->select = cmd_fis[7]; /* LBA 27:24 (LBA28) */
1008 ide_state->hob_sector = cmd_fis[8]; /* LBA 31:24 */
1009 ide_state->hob_lcyl = cmd_fis[9]; /* LBA 39:32 */
1010 ide_state->hob_hcyl = cmd_fis[10]; /* LBA 47:40 */
1011 ide_state->hob_feature = cmd_fis[11];
1012 ide_state->nsector = (int64_t)((cmd_fis[13] << 8) | cmd_fis[12]);
1013 /* 14, 16, 17, 18, 19: Reserved (SATA 1.0) */
1014 /* 15: Only valid when UPDATE_COMMAND not set. */
1015
1016 /* Copy the ACMD field (ATAPI packet, if any) from the AHCI command
1017 * table to ide_state->io_buffer */
1018 if (opts & AHCI_CMD_ATAPI) {
1019 memcpy(ide_state->io_buffer, &cmd_fis[AHCI_COMMAND_TABLE_ACMD], 0x10);
1020 debug_print_fis(ide_state->io_buffer, 0x10);
1021 s->dev[port].done_atapi_packet = false;
1022 /* XXX send PIO setup FIS */
1023 }
1024
1025 ide_state->error = 0;
1026
1027 /* Reset transferred byte counter */
1028 cmd->status = 0;
1029
1030 /* We're ready to process the command in FIS byte 2. */
1031 ide_exec_cmd(&s->dev[port].port, cmd_fis[2]);
1032 }
1033
1034 static int handle_cmd(AHCIState *s, int port, int slot)
1035 {
1036 IDEState *ide_state;
1037 uint64_t tbl_addr;
1038 AHCICmdHdr *cmd;
1039 uint8_t *cmd_fis;
1040 dma_addr_t cmd_len;
1041
1042 if (s->dev[port].port.ifs[0].status & (BUSY_STAT|DRQ_STAT)) {
1043 /* Engine currently busy, try again later */
1044 DPRINTF(port, "engine busy\n");
1045 return -1;
1046 }
1047
1048 if (!s->dev[port].lst) {
1049 DPRINTF(port, "error: lst not given but cmd handled");
1050 return -1;
1051 }
1052 cmd = &((AHCICmdHdr *)s->dev[port].lst)[slot];
1053 /* remember current slot handle for later */
1054 s->dev[port].cur_cmd = cmd;
1055
1056 /* The device we are working for */
1057 ide_state = &s->dev[port].port.ifs[0];
1058 if (!ide_state->blk) {
1059 DPRINTF(port, "error: guest accessed unused port");
1060 return -1;
1061 }
1062
1063 tbl_addr = le64_to_cpu(cmd->tbl_addr);
1064 cmd_len = 0x80;
1065 cmd_fis = dma_memory_map(s->as, tbl_addr, &cmd_len,
1066 DMA_DIRECTION_FROM_DEVICE);
1067 if (!cmd_fis) {
1068 DPRINTF(port, "error: guest passed us an invalid cmd fis\n");
1069 return -1;
1070 } else if (cmd_len != 0x80) {
1071 ahci_trigger_irq(s, &s->dev[port], PORT_IRQ_HBUS_ERR);
1072 DPRINTF(port, "error: dma_memory_map failed: "
1073 "(len(%02"PRIx64") != 0x80)\n",
1074 cmd_len);
1075 goto out;
1076 }
1077 debug_print_fis(cmd_fis, 0x80);
1078
1079 switch (cmd_fis[0]) {
1080 case SATA_FIS_TYPE_REGISTER_H2D:
1081 handle_reg_h2d_fis(s, port, slot, cmd_fis);
1082 break;
1083 default:
1084 DPRINTF(port, "unknown command cmd_fis[0]=%02x cmd_fis[1]=%02x "
1085 "cmd_fis[2]=%02x\n", cmd_fis[0], cmd_fis[1],
1086 cmd_fis[2]);
1087 break;
1088 }
1089
1090 out:
1091 dma_memory_unmap(s->as, cmd_fis, cmd_len, DMA_DIRECTION_FROM_DEVICE,
1092 cmd_len);
1093
1094 if (s->dev[port].port.ifs[0].status & (BUSY_STAT|DRQ_STAT)) {
1095 /* async command, complete later */
1096 s->dev[port].busy_slot = slot;
1097 return -1;
1098 }
1099
1100 /* done handling the command */
1101 return 0;
1102 }
1103
1104 /* DMA dev <-> ram */
1105 static void ahci_start_transfer(IDEDMA *dma)
1106 {
1107 AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
1108 IDEState *s = &ad->port.ifs[0];
1109 uint32_t size = (uint32_t)(s->data_end - s->data_ptr);
1110 /* write == ram -> device */
1111 uint32_t opts = le32_to_cpu(ad->cur_cmd->opts);
1112 int is_write = opts & AHCI_CMD_WRITE;
1113 int is_atapi = opts & AHCI_CMD_ATAPI;
1114 int has_sglist = 0;
1115
1116 if (is_atapi && !ad->done_atapi_packet) {
1117 /* already prepopulated iobuffer */
1118 ad->done_atapi_packet = true;
1119 size = 0;
1120 goto out;
1121 }
1122
1123 if (ahci_dma_prepare_buf(dma, is_write)) {
1124 has_sglist = 1;
1125 }
1126
1127 DPRINTF(ad->port_no, "%sing %d bytes on %s w/%s sglist\n",
1128 is_write ? "writ" : "read", size, is_atapi ? "atapi" : "ata",
1129 has_sglist ? "" : "o");
1130
1131 if (has_sglist && size) {
1132 if (is_write) {
1133 dma_buf_write(s->data_ptr, size, &s->sg);
1134 } else {
1135 dma_buf_read(s->data_ptr, size, &s->sg);
1136 }
1137 }
1138
1139 out:
1140 /* declare that we processed everything */
1141 s->data_ptr = s->data_end;
1142
1143 /* Update number of transferred bytes, destroy sglist */
1144 ahci_commit_buf(dma, size);
1145
1146 s->end_transfer_func(s);
1147
1148 if (!(s->status & DRQ_STAT)) {
1149 /* done with PIO send/receive */
1150 ahci_write_fis_pio(ad, le32_to_cpu(ad->cur_cmd->status));
1151 }
1152 }
1153
1154 static void ahci_start_dma(IDEDMA *dma, IDEState *s,
1155 BlockCompletionFunc *dma_cb)
1156 {
1157 #ifdef DEBUG_AHCI
1158 AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
1159 #endif
1160 DPRINTF(ad->port_no, "\n");
1161 s->io_buffer_offset = 0;
1162 dma_cb(s, 0);
1163 }
1164
1165 /**
1166 * Called in DMA R/W chains to read the PRDT, utilizing ahci_populate_sglist.
1167 * Not currently invoked by PIO R/W chains,
1168 * which invoke ahci_populate_sglist via ahci_start_transfer.
1169 */
1170 static int32_t ahci_dma_prepare_buf(IDEDMA *dma, int is_write)
1171 {
1172 AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
1173 IDEState *s = &ad->port.ifs[0];
1174
1175 if (ahci_populate_sglist(ad, &s->sg, s->io_buffer_offset) == -1) {
1176 DPRINTF(ad->port_no, "ahci_dma_prepare_buf failed.\n");
1177 return -1;
1178 }
1179 s->io_buffer_size = s->sg.size;
1180
1181 DPRINTF(ad->port_no, "len=%#x\n", s->io_buffer_size);
1182 return s->io_buffer_size;
1183 }
1184
1185 /**
1186 * Destroys the scatter-gather list,
1187 * and updates the command header with a bytes-read value.
1188 * called explicitly via ahci_dma_rw_buf (ATAPI DMA),
1189 * and ahci_start_transfer (PIO R/W),
1190 * and called via callback from ide_dma_cb for DMA R/W paths.
1191 */
1192 static void ahci_commit_buf(IDEDMA *dma, uint32_t tx_bytes)
1193 {
1194 AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
1195 IDEState *s = &ad->port.ifs[0];
1196
1197 tx_bytes += le32_to_cpu(ad->cur_cmd->status);
1198 ad->cur_cmd->status = cpu_to_le32(tx_bytes);
1199
1200 qemu_sglist_destroy(&s->sg);
1201 }
1202
1203 static int ahci_dma_rw_buf(IDEDMA *dma, int is_write)
1204 {
1205 AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
1206 IDEState *s = &ad->port.ifs[0];
1207 uint8_t *p = s->io_buffer + s->io_buffer_index;
1208 int l = s->io_buffer_size - s->io_buffer_index;
1209
1210 if (ahci_populate_sglist(ad, &s->sg, s->io_buffer_offset)) {
1211 return 0;
1212 }
1213
1214 if (is_write) {
1215 dma_buf_read(p, l, &s->sg);
1216 } else {
1217 dma_buf_write(p, l, &s->sg);
1218 }
1219
1220 /* free sglist, update byte count */
1221 ahci_commit_buf(dma, l);
1222
1223 s->io_buffer_index += l;
1224 s->io_buffer_offset += l;
1225
1226 DPRINTF(ad->port_no, "len=%#x\n", l);
1227
1228 return 1;
1229 }
1230
1231 static int ahci_dma_set_unit(IDEDMA *dma, int unit)
1232 {
1233 /* only a single unit per link */
1234 return 0;
1235 }
1236
1237 static void ahci_cmd_done(IDEDMA *dma)
1238 {
1239 AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
1240
1241 DPRINTF(ad->port_no, "cmd done\n");
1242
1243 /* update d2h status */
1244 ahci_write_fis_d2h(ad, NULL);
1245
1246 if (!ad->check_bh) {
1247 /* maybe we still have something to process, check later */
1248 ad->check_bh = qemu_bh_new(ahci_check_cmd_bh, ad);
1249 qemu_bh_schedule(ad->check_bh);
1250 }
1251 }
1252
1253 static void ahci_irq_set(void *opaque, int n, int level)
1254 {
1255 }
1256
1257 static void ahci_dma_restart_cb(void *opaque, int running, RunState state)
1258 {
1259 }
1260
1261 static const IDEDMAOps ahci_dma_ops = {
1262 .start_dma = ahci_start_dma,
1263 .start_transfer = ahci_start_transfer,
1264 .prepare_buf = ahci_dma_prepare_buf,
1265 .commit_buf = ahci_commit_buf,
1266 .rw_buf = ahci_dma_rw_buf,
1267 .set_unit = ahci_dma_set_unit,
1268 .cmd_done = ahci_cmd_done,
1269 .restart_cb = ahci_dma_restart_cb,
1270 };
1271
1272 void ahci_init(AHCIState *s, DeviceState *qdev, AddressSpace *as, int ports)
1273 {
1274 qemu_irq *irqs;
1275 int i;
1276
1277 s->as = as;
1278 s->ports = ports;
1279 s->dev = g_new0(AHCIDevice, ports);
1280 ahci_reg_init(s);
1281 /* XXX BAR size should be 1k, but that breaks, so bump it to 4k for now */
1282 memory_region_init_io(&s->mem, OBJECT(qdev), &ahci_mem_ops, s,
1283 "ahci", AHCI_MEM_BAR_SIZE);
1284 memory_region_init_io(&s->idp, OBJECT(qdev), &ahci_idp_ops, s,
1285 "ahci-idp", 32);
1286
1287 irqs = qemu_allocate_irqs(ahci_irq_set, s, s->ports);
1288
1289 for (i = 0; i < s->ports; i++) {
1290 AHCIDevice *ad = &s->dev[i];
1291
1292 ide_bus_new(&ad->port, sizeof(ad->port), qdev, i, 1);
1293 ide_init2(&ad->port, irqs[i]);
1294
1295 ad->hba = s;
1296 ad->port_no = i;
1297 ad->port.dma = &ad->dma;
1298 ad->port.dma->ops = &ahci_dma_ops;
1299 }
1300 }
1301
1302 void ahci_uninit(AHCIState *s)
1303 {
1304 g_free(s->dev);
1305 }
1306
1307 void ahci_reset(AHCIState *s)
1308 {
1309 AHCIPortRegs *pr;
1310 int i;
1311
1312 s->control_regs.irqstatus = 0;
1313 /* AHCI Enable (AE)
1314 * The implementation of this bit is dependent upon the value of the
1315 * CAP.SAM bit. If CAP.SAM is '0', then GHC.AE shall be read-write and
1316 * shall have a reset value of '0'. If CAP.SAM is '1', then AE shall be
1317 * read-only and shall have a reset value of '1'.
1318 *
1319 * We set HOST_CAP_AHCI so we must enable AHCI at reset.
1320 */
1321 s->control_regs.ghc = HOST_CTL_AHCI_EN;
1322
1323 for (i = 0; i < s->ports; i++) {
1324 pr = &s->dev[i].port_regs;
1325 pr->irq_stat = 0;
1326 pr->irq_mask = 0;
1327 pr->scr_ctl = 0;
1328 pr->cmd = PORT_CMD_SPIN_UP | PORT_CMD_POWER_ON;
1329 ahci_reset_port(s, i);
1330 }
1331 }
1332
1333 static const VMStateDescription vmstate_ahci_device = {
1334 .name = "ahci port",
1335 .version_id = 1,
1336 .fields = (VMStateField[]) {
1337 VMSTATE_IDE_BUS(port, AHCIDevice),
1338 VMSTATE_UINT32(port_state, AHCIDevice),
1339 VMSTATE_UINT32(finished, AHCIDevice),
1340 VMSTATE_UINT32(port_regs.lst_addr, AHCIDevice),
1341 VMSTATE_UINT32(port_regs.lst_addr_hi, AHCIDevice),
1342 VMSTATE_UINT32(port_regs.fis_addr, AHCIDevice),
1343 VMSTATE_UINT32(port_regs.fis_addr_hi, AHCIDevice),
1344 VMSTATE_UINT32(port_regs.irq_stat, AHCIDevice),
1345 VMSTATE_UINT32(port_regs.irq_mask, AHCIDevice),
1346 VMSTATE_UINT32(port_regs.cmd, AHCIDevice),
1347 VMSTATE_UINT32(port_regs.tfdata, AHCIDevice),
1348 VMSTATE_UINT32(port_regs.sig, AHCIDevice),
1349 VMSTATE_UINT32(port_regs.scr_stat, AHCIDevice),
1350 VMSTATE_UINT32(port_regs.scr_ctl, AHCIDevice),
1351 VMSTATE_UINT32(port_regs.scr_err, AHCIDevice),
1352 VMSTATE_UINT32(port_regs.scr_act, AHCIDevice),
1353 VMSTATE_UINT32(port_regs.cmd_issue, AHCIDevice),
1354 VMSTATE_BOOL(done_atapi_packet, AHCIDevice),
1355 VMSTATE_INT32(busy_slot, AHCIDevice),
1356 VMSTATE_BOOL(init_d2h_sent, AHCIDevice),
1357 VMSTATE_END_OF_LIST()
1358 },
1359 };
1360
1361 static int ahci_state_post_load(void *opaque, int version_id)
1362 {
1363 int i;
1364 struct AHCIDevice *ad;
1365 AHCIState *s = opaque;
1366
1367 for (i = 0; i < s->ports; i++) {
1368 ad = &s->dev[i];
1369 AHCIPortRegs *pr = &ad->port_regs;
1370
1371 map_page(s->as, &ad->lst,
1372 ((uint64_t)pr->lst_addr_hi << 32) | pr->lst_addr, 1024);
1373 map_page(s->as, &ad->res_fis,
1374 ((uint64_t)pr->fis_addr_hi << 32) | pr->fis_addr, 256);
1375 /*
1376 * All pending i/o should be flushed out on a migrate. However,
1377 * we might not have cleared the busy_slot since this is done
1378 * in a bh. Also, issue i/o against any slots that are pending.
1379 */
1380 if ((ad->busy_slot != -1) &&
1381 !(ad->port.ifs[0].status & (BUSY_STAT|DRQ_STAT))) {
1382 pr->cmd_issue &= ~(1 << ad->busy_slot);
1383 ad->busy_slot = -1;
1384 }
1385 check_cmd(s, i);
1386 }
1387
1388 return 0;
1389 }
1390
1391 const VMStateDescription vmstate_ahci = {
1392 .name = "ahci",
1393 .version_id = 1,
1394 .post_load = ahci_state_post_load,
1395 .fields = (VMStateField[]) {
1396 VMSTATE_STRUCT_VARRAY_POINTER_INT32(dev, AHCIState, ports,
1397 vmstate_ahci_device, AHCIDevice),
1398 VMSTATE_UINT32(control_regs.cap, AHCIState),
1399 VMSTATE_UINT32(control_regs.ghc, AHCIState),
1400 VMSTATE_UINT32(control_regs.irqstatus, AHCIState),
1401 VMSTATE_UINT32(control_regs.impl, AHCIState),
1402 VMSTATE_UINT32(control_regs.version, AHCIState),
1403 VMSTATE_UINT32(idp_index, AHCIState),
1404 VMSTATE_INT32_EQUAL(ports, AHCIState),
1405 VMSTATE_END_OF_LIST()
1406 },
1407 };
1408
1409 #define TYPE_SYSBUS_AHCI "sysbus-ahci"
1410 #define SYSBUS_AHCI(obj) OBJECT_CHECK(SysbusAHCIState, (obj), TYPE_SYSBUS_AHCI)
1411
1412 typedef struct SysbusAHCIState {
1413 /*< private >*/
1414 SysBusDevice parent_obj;
1415 /*< public >*/
1416
1417 AHCIState ahci;
1418 uint32_t num_ports;
1419 } SysbusAHCIState;
1420
1421 static const VMStateDescription vmstate_sysbus_ahci = {
1422 .name = "sysbus-ahci",
1423 .unmigratable = 1, /* Still buggy under I/O load */
1424 .fields = (VMStateField[]) {
1425 VMSTATE_AHCI(ahci, SysbusAHCIState),
1426 VMSTATE_END_OF_LIST()
1427 },
1428 };
1429
1430 static void sysbus_ahci_reset(DeviceState *dev)
1431 {
1432 SysbusAHCIState *s = SYSBUS_AHCI(dev);
1433
1434 ahci_reset(&s->ahci);
1435 }
1436
1437 static void sysbus_ahci_realize(DeviceState *dev, Error **errp)
1438 {
1439 SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
1440 SysbusAHCIState *s = SYSBUS_AHCI(dev);
1441
1442 ahci_init(&s->ahci, dev, &address_space_memory, s->num_ports);
1443
1444 sysbus_init_mmio(sbd, &s->ahci.mem);
1445 sysbus_init_irq(sbd, &s->ahci.irq);
1446 }
1447
1448 static Property sysbus_ahci_properties[] = {
1449 DEFINE_PROP_UINT32("num-ports", SysbusAHCIState, num_ports, 1),
1450 DEFINE_PROP_END_OF_LIST(),
1451 };
1452
1453 static void sysbus_ahci_class_init(ObjectClass *klass, void *data)
1454 {
1455 DeviceClass *dc = DEVICE_CLASS(klass);
1456
1457 dc->realize = sysbus_ahci_realize;
1458 dc->vmsd = &vmstate_sysbus_ahci;
1459 dc->props = sysbus_ahci_properties;
1460 dc->reset = sysbus_ahci_reset;
1461 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1462 }
1463
1464 static const TypeInfo sysbus_ahci_info = {
1465 .name = TYPE_SYSBUS_AHCI,
1466 .parent = TYPE_SYS_BUS_DEVICE,
1467 .instance_size = sizeof(SysbusAHCIState),
1468 .class_init = sysbus_ahci_class_init,
1469 };
1470
1471 static void sysbus_ahci_register_types(void)
1472 {
1473 type_register_static(&sysbus_ahci_info);
1474 }
1475
1476 type_init(sysbus_ahci_register_types)
1477
1478 void ahci_ide_create_devs(PCIDevice *dev, DriveInfo **hd)
1479 {
1480 AHCIPCIState *d = ICH_AHCI(dev);
1481 AHCIState *ahci = &d->ahci;
1482 int i;
1483
1484 for (i = 0; i < ahci->ports; i++) {
1485 if (hd[i] == NULL) {
1486 continue;
1487 }
1488 ide_create_drive(&ahci->dev[i].port, 0, hd[i]);
1489 }
1490
1491 }