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1.1 root 1: /*
2: * QEMU AHCI Emulation
3: *
4: * Copyright (c) 2010 [email protected]
5: * Copyright (c) 2010 Roland Elek <[email protected]>
6: * Copyright (c) 2010 Sebastian Herbszt <[email protected]>
7: * Copyright (c) 2010 Alexander Graf <[email protected]>
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/msi.h>
26: #include <hw/pc.h>
27: #include <hw/pci.h>
28:
29: #include "monitor.h"
30: #include "dma.h"
31: #include "cpu-common.h"
32: #include "internal.h"
33: #include <hw/ide/pci.h>
34: #include <hw/ide/ahci.h>
35:
36: /* #define DEBUG_AHCI */
37:
38: #ifdef DEBUG_AHCI
39: #define DPRINTF(port, fmt, ...) \
40: do { fprintf(stderr, "ahci: %s: [%d] ", __FUNCTION__, port); \
41: fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
42: #else
43: #define DPRINTF(port, fmt, ...) do {} while(0)
44: #endif
45:
46: static void check_cmd(AHCIState *s, int port);
47: static int handle_cmd(AHCIState *s,int port,int slot);
48: static void ahci_reset_port(AHCIState *s, int port);
49: static void ahci_write_fis_d2h(AHCIDevice *ad, uint8_t *cmd_fis);
50: static void ahci_init_d2h(AHCIDevice *ad);
51:
52: static uint32_t ahci_port_read(AHCIState *s, int port, int offset)
53: {
54: uint32_t val;
55: AHCIPortRegs *pr;
56: pr = &s->dev[port].port_regs;
57:
58: switch (offset) {
59: case PORT_LST_ADDR:
60: val = pr->lst_addr;
61: break;
62: case PORT_LST_ADDR_HI:
63: val = pr->lst_addr_hi;
64: break;
65: case PORT_FIS_ADDR:
66: val = pr->fis_addr;
67: break;
68: case PORT_FIS_ADDR_HI:
69: val = pr->fis_addr_hi;
70: break;
71: case PORT_IRQ_STAT:
72: val = pr->irq_stat;
73: break;
74: case PORT_IRQ_MASK:
75: val = pr->irq_mask;
76: break;
77: case PORT_CMD:
78: val = pr->cmd;
79: break;
80: case PORT_TFDATA:
81: val = ((uint16_t)s->dev[port].port.ifs[0].error << 8) |
82: s->dev[port].port.ifs[0].status;
83: break;
84: case PORT_SIG:
85: val = pr->sig;
86: break;
87: case PORT_SCR_STAT:
88: if (s->dev[port].port.ifs[0].bs) {
89: val = SATA_SCR_SSTATUS_DET_DEV_PRESENT_PHY_UP |
90: SATA_SCR_SSTATUS_SPD_GEN1 | SATA_SCR_SSTATUS_IPM_ACTIVE;
91: } else {
92: val = SATA_SCR_SSTATUS_DET_NODEV;
93: }
94: break;
95: case PORT_SCR_CTL:
96: val = pr->scr_ctl;
97: break;
98: case PORT_SCR_ERR:
99: val = pr->scr_err;
100: break;
101: case PORT_SCR_ACT:
102: pr->scr_act &= ~s->dev[port].finished;
103: s->dev[port].finished = 0;
104: val = pr->scr_act;
105: break;
106: case PORT_CMD_ISSUE:
107: val = pr->cmd_issue;
108: break;
109: case PORT_RESERVED:
110: default:
111: val = 0;
112: }
113: DPRINTF(port, "offset: 0x%x val: 0x%x\n", offset, val);
114: return val;
115:
116: }
117:
118: static void ahci_irq_raise(AHCIState *s, AHCIDevice *dev)
119: {
120: struct AHCIPCIState *d = container_of(s, AHCIPCIState, ahci);
121:
122: DPRINTF(0, "raise irq\n");
123:
124: if (msi_enabled(&d->card)) {
125: msi_notify(&d->card, 0);
126: } else {
127: qemu_irq_raise(s->irq);
128: }
129: }
130:
131: static void ahci_irq_lower(AHCIState *s, AHCIDevice *dev)
132: {
133: struct AHCIPCIState *d = container_of(s, AHCIPCIState, ahci);
134:
135: DPRINTF(0, "lower irq\n");
136:
137: if (!msi_enabled(&d->card)) {
138: qemu_irq_lower(s->irq);
139: }
140: }
141:
142: static void ahci_check_irq(AHCIState *s)
143: {
144: int i;
145:
146: DPRINTF(-1, "check irq %#x\n", s->control_regs.irqstatus);
147:
148: for (i = 0; i < s->ports; i++) {
149: AHCIPortRegs *pr = &s->dev[i].port_regs;
150: if (pr->irq_stat & pr->irq_mask) {
151: s->control_regs.irqstatus |= (1 << i);
152: }
153: }
154:
155: if (s->control_regs.irqstatus &&
156: (s->control_regs.ghc & HOST_CTL_IRQ_EN)) {
157: ahci_irq_raise(s, NULL);
158: } else {
159: ahci_irq_lower(s, NULL);
160: }
161: }
162:
163: static void ahci_trigger_irq(AHCIState *s, AHCIDevice *d,
164: int irq_type)
165: {
166: DPRINTF(d->port_no, "trigger irq %#x -> %x\n",
167: irq_type, d->port_regs.irq_mask & irq_type);
168:
169: d->port_regs.irq_stat |= irq_type;
170: ahci_check_irq(s);
171: }
172:
173: static void map_page(uint8_t **ptr, uint64_t addr, uint32_t wanted)
174: {
175: target_phys_addr_t len = wanted;
176:
177: if (*ptr) {
178: cpu_physical_memory_unmap(*ptr, len, 1, len);
179: }
180:
181: *ptr = cpu_physical_memory_map(addr, &len, 1);
182: if (len < wanted) {
183: cpu_physical_memory_unmap(*ptr, len, 1, len);
184: *ptr = NULL;
185: }
186: }
187:
188: static void ahci_port_write(AHCIState *s, int port, int offset, uint32_t val)
189: {
190: AHCIPortRegs *pr = &s->dev[port].port_regs;
191:
192: DPRINTF(port, "offset: 0x%x val: 0x%x\n", offset, val);
193: switch (offset) {
194: case PORT_LST_ADDR:
195: pr->lst_addr = val;
196: map_page(&s->dev[port].lst,
197: ((uint64_t)pr->lst_addr_hi << 32) | pr->lst_addr, 1024);
198: s->dev[port].cur_cmd = NULL;
199: break;
200: case PORT_LST_ADDR_HI:
201: pr->lst_addr_hi = val;
202: map_page(&s->dev[port].lst,
203: ((uint64_t)pr->lst_addr_hi << 32) | pr->lst_addr, 1024);
204: s->dev[port].cur_cmd = NULL;
205: break;
206: case PORT_FIS_ADDR:
207: pr->fis_addr = val;
208: map_page(&s->dev[port].res_fis,
209: ((uint64_t)pr->fis_addr_hi << 32) | pr->fis_addr, 256);
210: break;
211: case PORT_FIS_ADDR_HI:
212: pr->fis_addr_hi = val;
213: map_page(&s->dev[port].res_fis,
214: ((uint64_t)pr->fis_addr_hi << 32) | pr->fis_addr, 256);
215: break;
216: case PORT_IRQ_STAT:
217: pr->irq_stat &= ~val;
218: break;
219: case PORT_IRQ_MASK:
220: pr->irq_mask = val & 0xfdc000ff;
221: ahci_check_irq(s);
222: break;
223: case PORT_CMD:
224: pr->cmd = val & ~(PORT_CMD_LIST_ON | PORT_CMD_FIS_ON);
225:
226: if (pr->cmd & PORT_CMD_START) {
227: pr->cmd |= PORT_CMD_LIST_ON;
228: }
229:
230: if (pr->cmd & PORT_CMD_FIS_RX) {
231: pr->cmd |= PORT_CMD_FIS_ON;
232: }
233:
234: /* XXX usually the FIS would be pending on the bus here and
235: issuing deferred until the OS enables FIS receival.
236: Instead, we only submit it once - which works in most
237: cases, but is a hack. */
238: if ((pr->cmd & PORT_CMD_FIS_ON) &&
239: !s->dev[port].init_d2h_sent) {
240: ahci_init_d2h(&s->dev[port]);
241: s->dev[port].init_d2h_sent = 1;
242: }
243:
244: check_cmd(s, port);
245: break;
246: case PORT_TFDATA:
247: s->dev[port].port.ifs[0].error = (val >> 8) & 0xff;
248: s->dev[port].port.ifs[0].status = val & 0xff;
249: break;
250: case PORT_SIG:
251: pr->sig = val;
252: break;
253: case PORT_SCR_STAT:
254: pr->scr_stat = val;
255: break;
256: case PORT_SCR_CTL:
257: if (((pr->scr_ctl & AHCI_SCR_SCTL_DET) == 1) &&
258: ((val & AHCI_SCR_SCTL_DET) == 0)) {
259: ahci_reset_port(s, port);
260: }
261: pr->scr_ctl = val;
262: break;
263: case PORT_SCR_ERR:
264: pr->scr_err &= ~val;
265: break;
266: case PORT_SCR_ACT:
267: /* RW1 */
268: pr->scr_act |= val;
269: break;
270: case PORT_CMD_ISSUE:
271: pr->cmd_issue |= val;
272: check_cmd(s, port);
273: break;
274: default:
275: break;
276: }
277: }
278:
279: static uint32_t ahci_mem_readl(void *ptr, target_phys_addr_t addr)
280: {
281: AHCIState *s = ptr;
282: uint32_t val = 0;
283:
284: addr = addr & 0xfff;
285: if (addr < AHCI_GENERIC_HOST_CONTROL_REGS_MAX_ADDR) {
286: switch (addr) {
287: case HOST_CAP:
288: val = s->control_regs.cap;
289: break;
290: case HOST_CTL:
291: val = s->control_regs.ghc;
292: break;
293: case HOST_IRQ_STAT:
294: val = s->control_regs.irqstatus;
295: break;
296: case HOST_PORTS_IMPL:
297: val = s->control_regs.impl;
298: break;
299: case HOST_VERSION:
300: val = s->control_regs.version;
301: break;
302: }
303:
304: DPRINTF(-1, "(addr 0x%08X), val 0x%08X\n", (unsigned) addr, val);
305: } else if ((addr >= AHCI_PORT_REGS_START_ADDR) &&
306: (addr < (AHCI_PORT_REGS_START_ADDR +
307: (s->ports * AHCI_PORT_ADDR_OFFSET_LEN)))) {
308: val = ahci_port_read(s, (addr - AHCI_PORT_REGS_START_ADDR) >> 7,
309: addr & AHCI_PORT_ADDR_OFFSET_MASK);
310: }
311:
312: return val;
313: }
314:
315:
316:
317: static void ahci_mem_writel(void *ptr, target_phys_addr_t addr, uint32_t val)
318: {
319: AHCIState *s = ptr;
320: addr = addr & 0xfff;
321:
322: /* Only aligned reads are allowed on AHCI */
323: if (addr & 3) {
324: fprintf(stderr, "ahci: Mis-aligned write to addr 0x"
325: TARGET_FMT_plx "\n", addr);
326: return;
327: }
328:
329: if (addr < AHCI_GENERIC_HOST_CONTROL_REGS_MAX_ADDR) {
330: DPRINTF(-1, "(addr 0x%08X), val 0x%08X\n", (unsigned) addr, val);
331:
332: switch (addr) {
333: case HOST_CAP: /* R/WO, RO */
334: /* FIXME handle R/WO */
335: break;
336: case HOST_CTL: /* R/W */
337: if (val & HOST_CTL_RESET) {
338: DPRINTF(-1, "HBA Reset\n");
339: ahci_reset(container_of(s, AHCIPCIState, ahci));
340: } else {
341: s->control_regs.ghc = (val & 0x3) | HOST_CTL_AHCI_EN;
342: ahci_check_irq(s);
343: }
344: break;
345: case HOST_IRQ_STAT: /* R/WC, RO */
346: s->control_regs.irqstatus &= ~val;
347: ahci_check_irq(s);
348: break;
349: case HOST_PORTS_IMPL: /* R/WO, RO */
350: /* FIXME handle R/WO */
351: break;
352: case HOST_VERSION: /* RO */
353: /* FIXME report write? */
354: break;
355: default:
356: DPRINTF(-1, "write to unknown register 0x%x\n", (unsigned)addr);
357: }
358: } else if ((addr >= AHCI_PORT_REGS_START_ADDR) &&
359: (addr < (AHCI_PORT_REGS_START_ADDR +
360: (s->ports * AHCI_PORT_ADDR_OFFSET_LEN)))) {
361: ahci_port_write(s, (addr - AHCI_PORT_REGS_START_ADDR) >> 7,
362: addr & AHCI_PORT_ADDR_OFFSET_MASK, val);
363: }
364:
365: }
366:
367: static CPUReadMemoryFunc * const ahci_readfn[3]={
368: ahci_mem_readl,
369: ahci_mem_readl,
370: ahci_mem_readl
371: };
372:
373: static CPUWriteMemoryFunc * const ahci_writefn[3]={
374: ahci_mem_writel,
375: ahci_mem_writel,
376: ahci_mem_writel
377: };
378:
379: static void ahci_reg_init(AHCIState *s)
380: {
381: int i;
382:
383: s->control_regs.cap = (s->ports - 1) |
384: (AHCI_NUM_COMMAND_SLOTS << 8) |
385: (AHCI_SUPPORTED_SPEED_GEN1 << AHCI_SUPPORTED_SPEED) |
386: HOST_CAP_NCQ | HOST_CAP_AHCI;
387:
388: s->control_regs.impl = (1 << s->ports) - 1;
389:
390: s->control_regs.version = AHCI_VERSION_1_0;
391:
392: for (i = 0; i < s->ports; i++) {
393: s->dev[i].port_state = STATE_RUN;
394: }
395: }
396:
397: static uint32_t read_from_sglist(uint8_t *buffer, uint32_t len,
398: QEMUSGList *sglist)
399: {
400: uint32_t i = 0;
401: uint32_t total = 0, once;
402: ScatterGatherEntry *cur_prd;
403: uint32_t sgcount;
404:
405: cur_prd = sglist->sg;
406: sgcount = sglist->nsg;
407: for (i = 0; len && sgcount; i++) {
408: once = MIN(cur_prd->len, len);
409: cpu_physical_memory_read(cur_prd->base, buffer, once);
410: cur_prd++;
411: sgcount--;
412: len -= once;
413: buffer += once;
414: total += once;
415: }
416:
417: return total;
418: }
419:
420: static uint32_t write_to_sglist(uint8_t *buffer, uint32_t len,
421: QEMUSGList *sglist)
422: {
423: uint32_t i = 0;
424: uint32_t total = 0, once;
425: ScatterGatherEntry *cur_prd;
426: uint32_t sgcount;
427:
428: DPRINTF(-1, "total: 0x%x bytes\n", len);
429:
430: cur_prd = sglist->sg;
431: sgcount = sglist->nsg;
432: for (i = 0; len && sgcount; i++) {
433: once = MIN(cur_prd->len, len);
434: DPRINTF(-1, "write 0x%x bytes to 0x%lx\n", once, (long)cur_prd->base);
435: cpu_physical_memory_write(cur_prd->base, buffer, once);
436: cur_prd++;
437: sgcount--;
438: len -= once;
439: buffer += once;
440: total += once;
441: }
442:
443: return total;
444: }
445:
446: static void check_cmd(AHCIState *s, int port)
447: {
448: AHCIPortRegs *pr = &s->dev[port].port_regs;
449: int slot;
450:
451: if ((pr->cmd & PORT_CMD_START) && pr->cmd_issue) {
452: for (slot = 0; (slot < 32) && pr->cmd_issue; slot++) {
453: if ((pr->cmd_issue & (1 << slot)) &&
454: !handle_cmd(s, port, slot)) {
455: pr->cmd_issue &= ~(1 << slot);
456: }
457: }
458: }
459: }
460:
461: static void ahci_check_cmd_bh(void *opaque)
462: {
463: AHCIDevice *ad = opaque;
464:
465: qemu_bh_delete(ad->check_bh);
466: ad->check_bh = NULL;
467:
468: if ((ad->busy_slot != -1) &&
469: !(ad->port.ifs[0].status & (BUSY_STAT|DRQ_STAT))) {
470: /* no longer busy */
471: ad->port_regs.cmd_issue &= ~(1 << ad->busy_slot);
472: ad->busy_slot = -1;
473: }
474:
475: check_cmd(ad->hba, ad->port_no);
476: }
477:
478: static void ahci_init_d2h(AHCIDevice *ad)
479: {
480: uint8_t init_fis[0x20];
481: IDEState *ide_state = &ad->port.ifs[0];
482:
483: memset(init_fis, 0, sizeof(init_fis));
484:
485: init_fis[4] = 1;
486: init_fis[12] = 1;
487:
488: if (ide_state->drive_kind == IDE_CD) {
489: init_fis[5] = ide_state->lcyl;
490: init_fis[6] = ide_state->hcyl;
491: }
492:
493: ahci_write_fis_d2h(ad, init_fis);
494: }
495:
496: static void ahci_reset_port(AHCIState *s, int port)
497: {
498: AHCIDevice *d = &s->dev[port];
499: AHCIPortRegs *pr = &d->port_regs;
500: IDEState *ide_state = &d->port.ifs[0];
501: int i;
502:
503: DPRINTF(port, "reset port\n");
504:
505: ide_bus_reset(&d->port);
506: ide_state->ncq_queues = AHCI_MAX_CMDS;
507:
508: pr->irq_stat = 0;
509: pr->irq_mask = 0;
510: pr->scr_stat = 0;
511: pr->scr_ctl = 0;
512: pr->scr_err = 0;
513: pr->scr_act = 0;
514: d->busy_slot = -1;
515: d->init_d2h_sent = 0;
516:
517: ide_state = &s->dev[port].port.ifs[0];
518: if (!ide_state->bs) {
519: return;
520: }
521:
522: /* reset ncq queue */
523: for (i = 0; i < AHCI_MAX_CMDS; i++) {
524: NCQTransferState *ncq_tfs = &s->dev[port].ncq_tfs[i];
525: if (!ncq_tfs->used) {
526: continue;
527: }
528:
529: if (ncq_tfs->aiocb) {
530: bdrv_aio_cancel(ncq_tfs->aiocb);
531: ncq_tfs->aiocb = NULL;
532: }
533:
534: qemu_sglist_destroy(&ncq_tfs->sglist);
535: ncq_tfs->used = 0;
536: }
537:
538: s->dev[port].port_state = STATE_RUN;
539: if (!ide_state->bs) {
540: s->dev[port].port_regs.sig = 0;
541: ide_state->status = SEEK_STAT | WRERR_STAT;
542: } else if (ide_state->drive_kind == IDE_CD) {
543: s->dev[port].port_regs.sig = SATA_SIGNATURE_CDROM;
544: ide_state->lcyl = 0x14;
545: ide_state->hcyl = 0xeb;
546: DPRINTF(port, "set lcyl = %d\n", ide_state->lcyl);
547: ide_state->status = SEEK_STAT | WRERR_STAT | READY_STAT;
548: } else {
549: s->dev[port].port_regs.sig = SATA_SIGNATURE_DISK;
550: ide_state->status = SEEK_STAT | WRERR_STAT;
551: }
552:
553: ide_state->error = 1;
554: ahci_init_d2h(d);
555: }
556:
557: static void debug_print_fis(uint8_t *fis, int cmd_len)
558: {
559: #ifdef DEBUG_AHCI
560: int i;
561:
562: fprintf(stderr, "fis:");
563: for (i = 0; i < cmd_len; i++) {
564: if ((i & 0xf) == 0) {
565: fprintf(stderr, "\n%02x:",i);
566: }
567: fprintf(stderr, "%02x ",fis[i]);
568: }
569: fprintf(stderr, "\n");
570: #endif
571: }
572:
573: static void ahci_write_fis_sdb(AHCIState *s, int port, uint32_t finished)
574: {
575: AHCIPortRegs *pr = &s->dev[port].port_regs;
576: IDEState *ide_state;
577: uint8_t *sdb_fis;
578:
579: if (!s->dev[port].res_fis ||
580: !(pr->cmd & PORT_CMD_FIS_RX)) {
581: return;
582: }
583:
584: sdb_fis = &s->dev[port].res_fis[RES_FIS_SDBFIS];
585: ide_state = &s->dev[port].port.ifs[0];
586:
587: /* clear memory */
588: *(uint32_t*)sdb_fis = 0;
589:
590: /* write values */
591: sdb_fis[0] = ide_state->error;
592: sdb_fis[2] = ide_state->status & 0x77;
593: s->dev[port].finished |= finished;
594: *(uint32_t*)(sdb_fis + 4) = cpu_to_le32(s->dev[port].finished);
595:
596: ahci_trigger_irq(s, &s->dev[port], PORT_IRQ_STAT_SDBS);
597: }
598:
599: static void ahci_write_fis_d2h(AHCIDevice *ad, uint8_t *cmd_fis)
600: {
601: AHCIPortRegs *pr = &ad->port_regs;
602: uint8_t *d2h_fis;
603: int i;
604: target_phys_addr_t cmd_len = 0x80;
605: int cmd_mapped = 0;
606:
607: if (!ad->res_fis || !(pr->cmd & PORT_CMD_FIS_RX)) {
608: return;
609: }
610:
611: if (!cmd_fis) {
612: /* map cmd_fis */
613: uint64_t tbl_addr = le64_to_cpu(ad->cur_cmd->tbl_addr);
614: cmd_fis = cpu_physical_memory_map(tbl_addr, &cmd_len, 0);
615: cmd_mapped = 1;
616: }
617:
618: d2h_fis = &ad->res_fis[RES_FIS_RFIS];
619:
620: d2h_fis[0] = 0x34;
621: d2h_fis[1] = (ad->hba->control_regs.irqstatus ? (1 << 6) : 0);
622: d2h_fis[2] = ad->port.ifs[0].status;
623: d2h_fis[3] = ad->port.ifs[0].error;
624:
625: d2h_fis[4] = cmd_fis[4];
626: d2h_fis[5] = cmd_fis[5];
627: d2h_fis[6] = cmd_fis[6];
628: d2h_fis[7] = cmd_fis[7];
629: d2h_fis[8] = cmd_fis[8];
630: d2h_fis[9] = cmd_fis[9];
631: d2h_fis[10] = cmd_fis[10];
632: d2h_fis[11] = cmd_fis[11];
633: d2h_fis[12] = cmd_fis[12];
634: d2h_fis[13] = cmd_fis[13];
635: for (i = 14; i < 0x20; i++) {
636: d2h_fis[i] = 0;
637: }
638:
639: if (d2h_fis[2] & ERR_STAT) {
640: ahci_trigger_irq(ad->hba, ad, PORT_IRQ_STAT_TFES);
641: }
642:
643: ahci_trigger_irq(ad->hba, ad, PORT_IRQ_D2H_REG_FIS);
644:
645: if (cmd_mapped) {
646: cpu_physical_memory_unmap(cmd_fis, cmd_len, 0, cmd_len);
647: }
648: }
649:
650: static int ahci_populate_sglist(AHCIDevice *ad, QEMUSGList *sglist)
651: {
652: AHCICmdHdr *cmd = ad->cur_cmd;
653: uint32_t opts = le32_to_cpu(cmd->opts);
654: uint64_t prdt_addr = le64_to_cpu(cmd->tbl_addr) + 0x80;
655: int sglist_alloc_hint = opts >> AHCI_CMD_HDR_PRDT_LEN;
656: target_phys_addr_t prdt_len = (sglist_alloc_hint * sizeof(AHCI_SG));
657: target_phys_addr_t real_prdt_len = prdt_len;
658: uint8_t *prdt;
659: int i;
660: int r = 0;
661:
662: if (!sglist_alloc_hint) {
663: DPRINTF(ad->port_no, "no sg list given by guest: 0x%08x\n", opts);
664: return -1;
665: }
666:
667: /* map PRDT */
668: if (!(prdt = cpu_physical_memory_map(prdt_addr, &prdt_len, 0))){
669: DPRINTF(ad->port_no, "map failed\n");
670: return -1;
671: }
672:
673: if (prdt_len < real_prdt_len) {
674: DPRINTF(ad->port_no, "mapped less than expected\n");
675: r = -1;
676: goto out;
677: }
678:
679: /* Get entries in the PRDT, init a qemu sglist accordingly */
680: if (sglist_alloc_hint > 0) {
681: AHCI_SG *tbl = (AHCI_SG *)prdt;
682:
683: qemu_sglist_init(sglist, sglist_alloc_hint);
684: for (i = 0; i < sglist_alloc_hint; i++) {
685: /* flags_size is zero-based */
686: qemu_sglist_add(sglist, le64_to_cpu(tbl[i].addr),
687: le32_to_cpu(tbl[i].flags_size) + 1);
688: }
689: }
690:
691: out:
692: cpu_physical_memory_unmap(prdt, prdt_len, 0, prdt_len);
693: return r;
694: }
695:
696: static void ncq_cb(void *opaque, int ret)
697: {
698: NCQTransferState *ncq_tfs = (NCQTransferState *)opaque;
699: IDEState *ide_state = &ncq_tfs->drive->port.ifs[0];
700:
701: /* Clear bit for this tag in SActive */
702: ncq_tfs->drive->port_regs.scr_act &= ~(1 << ncq_tfs->tag);
703:
704: if (ret < 0) {
705: /* error */
706: ide_state->error = ABRT_ERR;
707: ide_state->status = READY_STAT | ERR_STAT;
708: ncq_tfs->drive->port_regs.scr_err |= (1 << ncq_tfs->tag);
709: } else {
710: ide_state->status = READY_STAT | SEEK_STAT;
711: }
712:
713: ahci_write_fis_sdb(ncq_tfs->drive->hba, ncq_tfs->drive->port_no,
714: (1 << ncq_tfs->tag));
715:
716: DPRINTF(ncq_tfs->drive->port_no, "NCQ transfer tag %d finished\n",
717: ncq_tfs->tag);
718:
719: qemu_sglist_destroy(&ncq_tfs->sglist);
720: ncq_tfs->used = 0;
721: }
722:
723: static void process_ncq_command(AHCIState *s, int port, uint8_t *cmd_fis,
724: int slot)
725: {
726: NCQFrame *ncq_fis = (NCQFrame*)cmd_fis;
727: uint8_t tag = ncq_fis->tag >> 3;
728: NCQTransferState *ncq_tfs = &s->dev[port].ncq_tfs[tag];
729:
730: if (ncq_tfs->used) {
731: /* error - already in use */
732: fprintf(stderr, "%s: tag %d already used\n", __FUNCTION__, tag);
733: return;
734: }
735:
736: ncq_tfs->used = 1;
737: ncq_tfs->drive = &s->dev[port];
738: ncq_tfs->slot = slot;
739: ncq_tfs->lba = ((uint64_t)ncq_fis->lba5 << 40) |
740: ((uint64_t)ncq_fis->lba4 << 32) |
741: ((uint64_t)ncq_fis->lba3 << 24) |
742: ((uint64_t)ncq_fis->lba2 << 16) |
743: ((uint64_t)ncq_fis->lba1 << 8) |
744: (uint64_t)ncq_fis->lba0;
745:
746: /* Note: We calculate the sector count, but don't currently rely on it.
747: * The total size of the DMA buffer tells us the transfer size instead. */
748: ncq_tfs->sector_count = ((uint16_t)ncq_fis->sector_count_high << 8) |
749: ncq_fis->sector_count_low;
750:
751: DPRINTF(port, "NCQ transfer LBA from %ld to %ld, drive max %ld\n",
752: ncq_tfs->lba, ncq_tfs->lba + ncq_tfs->sector_count - 2,
753: s->dev[port].port.ifs[0].nb_sectors - 1);
754:
755: ahci_populate_sglist(&s->dev[port], &ncq_tfs->sglist);
756: ncq_tfs->tag = tag;
757:
758: switch(ncq_fis->command) {
759: case READ_FPDMA_QUEUED:
760: DPRINTF(port, "NCQ reading %d sectors from LBA %ld, tag %d\n",
761: ncq_tfs->sector_count-1, ncq_tfs->lba, ncq_tfs->tag);
762: ncq_tfs->is_read = 1;
763:
764: DPRINTF(port, "tag %d aio read %ld\n", ncq_tfs->tag, ncq_tfs->lba);
765: ncq_tfs->aiocb = dma_bdrv_read(ncq_tfs->drive->port.ifs[0].bs,
766: &ncq_tfs->sglist, ncq_tfs->lba,
767: ncq_cb, ncq_tfs);
768: break;
769: case WRITE_FPDMA_QUEUED:
770: DPRINTF(port, "NCQ writing %d sectors to LBA %ld, tag %d\n",
771: ncq_tfs->sector_count-1, ncq_tfs->lba, ncq_tfs->tag);
772: ncq_tfs->is_read = 0;
773:
774: DPRINTF(port, "tag %d aio write %ld\n", ncq_tfs->tag, ncq_tfs->lba);
775: ncq_tfs->aiocb = dma_bdrv_write(ncq_tfs->drive->port.ifs[0].bs,
776: &ncq_tfs->sglist, ncq_tfs->lba,
777: ncq_cb, ncq_tfs);
778: break;
779: default:
780: DPRINTF(port, "error: tried to process non-NCQ command as NCQ\n");
781: qemu_sglist_destroy(&ncq_tfs->sglist);
782: break;
783: }
784: }
785:
786: static int handle_cmd(AHCIState *s, int port, int slot)
787: {
788: IDEState *ide_state;
789: uint32_t opts;
790: uint64_t tbl_addr;
791: AHCICmdHdr *cmd;
792: uint8_t *cmd_fis;
793: target_phys_addr_t cmd_len;
794:
795: if (s->dev[port].port.ifs[0].status & (BUSY_STAT|DRQ_STAT)) {
796: /* Engine currently busy, try again later */
797: DPRINTF(port, "engine busy\n");
798: return -1;
799: }
800:
801: cmd = &((AHCICmdHdr *)s->dev[port].lst)[slot];
802:
803: if (!s->dev[port].lst) {
804: DPRINTF(port, "error: lst not given but cmd handled");
805: return -1;
806: }
807:
808: /* remember current slot handle for later */
809: s->dev[port].cur_cmd = cmd;
810:
811: opts = le32_to_cpu(cmd->opts);
812: tbl_addr = le64_to_cpu(cmd->tbl_addr);
813:
814: cmd_len = 0x80;
815: cmd_fis = cpu_physical_memory_map(tbl_addr, &cmd_len, 1);
816:
817: if (!cmd_fis) {
818: DPRINTF(port, "error: guest passed us an invalid cmd fis\n");
819: return -1;
820: }
821:
822: /* The device we are working for */
823: ide_state = &s->dev[port].port.ifs[0];
824:
825: if (!ide_state->bs) {
826: DPRINTF(port, "error: guest accessed unused port");
827: goto out;
828: }
829:
830: debug_print_fis(cmd_fis, 0x90);
831: //debug_print_fis(cmd_fis, (opts & AHCI_CMD_HDR_CMD_FIS_LEN) * 4);
832:
833: switch (cmd_fis[0]) {
834: case SATA_FIS_TYPE_REGISTER_H2D:
835: break;
836: default:
837: DPRINTF(port, "unknown command cmd_fis[0]=%02x cmd_fis[1]=%02x "
838: "cmd_fis[2]=%02x\n", cmd_fis[0], cmd_fis[1],
839: cmd_fis[2]);
840: goto out;
841: break;
842: }
843:
844: switch (cmd_fis[1]) {
845: case SATA_FIS_REG_H2D_UPDATE_COMMAND_REGISTER:
846: break;
847: case 0:
848: break;
849: default:
850: DPRINTF(port, "unknown command cmd_fis[0]=%02x cmd_fis[1]=%02x "
851: "cmd_fis[2]=%02x\n", cmd_fis[0], cmd_fis[1],
852: cmd_fis[2]);
853: goto out;
854: break;
855: }
856:
857: switch (s->dev[port].port_state) {
858: case STATE_RUN:
859: if (cmd_fis[15] & ATA_SRST) {
860: s->dev[port].port_state = STATE_RESET;
861: }
862: break;
863: case STATE_RESET:
864: if (!(cmd_fis[15] & ATA_SRST)) {
865: ahci_reset_port(s, port);
866: }
867: break;
868: }
869:
870: if (cmd_fis[1] == SATA_FIS_REG_H2D_UPDATE_COMMAND_REGISTER) {
871:
872: /* Check for NCQ command */
873: if ((cmd_fis[2] == READ_FPDMA_QUEUED) ||
874: (cmd_fis[2] == WRITE_FPDMA_QUEUED)) {
875: process_ncq_command(s, port, cmd_fis, slot);
876: goto out;
877: }
878:
879: /* Decompose the FIS */
880: ide_state->nsector = (int64_t)((cmd_fis[13] << 8) | cmd_fis[12]);
881: ide_state->feature = cmd_fis[3];
882: if (!ide_state->nsector) {
883: ide_state->nsector = 256;
884: }
885:
886: if (ide_state->drive_kind != IDE_CD) {
1.1.1.2 ! root 887: /*
! 888: * We set the sector depending on the sector defined in the FIS.
! 889: * Unfortunately, the spec isn't exactly obvious on this one.
! 890: *
! 891: * Apparently LBA48 commands set fis bytes 10,9,8,6,5,4 to the
! 892: * 48 bit sector number. ATA_CMD_READ_DMA_EXT is an example for
! 893: * such a command.
! 894: *
! 895: * Non-LBA48 commands however use 7[lower 4 bits],6,5,4 to define a
! 896: * 28-bit sector number. ATA_CMD_READ_DMA is an example for such
! 897: * a command.
! 898: *
! 899: * Since the spec doesn't explicitly state what each field should
! 900: * do, I simply assume non-used fields as reserved and OR everything
! 901: * together, independent of the command.
! 902: */
! 903: ide_set_sector(ide_state, ((uint64_t)cmd_fis[10] << 40)
! 904: | ((uint64_t)cmd_fis[9] << 32)
! 905: /* This is used for LBA48 commands */
! 906: | ((uint64_t)cmd_fis[8] << 24)
! 907: /* This is used for non-LBA48 commands */
! 908: | ((uint64_t)(cmd_fis[7] & 0xf) << 24)
! 909: | ((uint64_t)cmd_fis[6] << 16)
! 910: | ((uint64_t)cmd_fis[5] << 8)
! 911: | cmd_fis[4]);
1.1 root 912: }
913:
914: /* Copy the ACMD field (ATAPI packet, if any) from the AHCI command
915: * table to ide_state->io_buffer
916: */
917: if (opts & AHCI_CMD_ATAPI) {
918: memcpy(ide_state->io_buffer, &cmd_fis[AHCI_COMMAND_TABLE_ACMD], 0x10);
919: ide_state->lcyl = 0x14;
920: ide_state->hcyl = 0xeb;
921: debug_print_fis(ide_state->io_buffer, 0x10);
922: ide_state->feature = IDE_FEATURE_DMA;
923: s->dev[port].done_atapi_packet = 0;
924: /* XXX send PIO setup FIS */
925: }
926:
927: ide_state->error = 0;
928:
929: /* Reset transferred byte counter */
930: cmd->status = 0;
931:
932: /* We're ready to process the command in FIS byte 2. */
933: ide_exec_cmd(&s->dev[port].port, cmd_fis[2]);
934:
935: if (s->dev[port].port.ifs[0].status & READY_STAT) {
936: ahci_write_fis_d2h(&s->dev[port], cmd_fis);
937: }
938: }
939:
940: out:
941: cpu_physical_memory_unmap(cmd_fis, cmd_len, 1, cmd_len);
942:
943: if (s->dev[port].port.ifs[0].status & (BUSY_STAT|DRQ_STAT)) {
944: /* async command, complete later */
945: s->dev[port].busy_slot = slot;
946: return -1;
947: }
948:
949: /* done handling the command */
950: return 0;
951: }
952:
953: /* DMA dev <-> ram */
954: static int ahci_start_transfer(IDEDMA *dma)
955: {
956: AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
957: IDEState *s = &ad->port.ifs[0];
958: uint32_t size = (uint32_t)(s->data_end - s->data_ptr);
959: /* write == ram -> device */
960: uint32_t opts = le32_to_cpu(ad->cur_cmd->opts);
961: int is_write = opts & AHCI_CMD_WRITE;
962: int is_atapi = opts & AHCI_CMD_ATAPI;
963: int has_sglist = 0;
964:
965: if (is_atapi && !ad->done_atapi_packet) {
966: /* already prepopulated iobuffer */
967: ad->done_atapi_packet = 1;
968: goto out;
969: }
970:
971: if (!ahci_populate_sglist(ad, &s->sg)) {
972: has_sglist = 1;
973: }
974:
975: DPRINTF(ad->port_no, "%sing %d bytes on %s w/%s sglist\n",
976: is_write ? "writ" : "read", size, is_atapi ? "atapi" : "ata",
977: has_sglist ? "" : "o");
978:
979: if (is_write && has_sglist && (s->data_ptr < s->data_end)) {
980: read_from_sglist(s->data_ptr, size, &s->sg);
981: }
982:
983: if (!is_write && has_sglist && (s->data_ptr < s->data_end)) {
984: write_to_sglist(s->data_ptr, size, &s->sg);
985: }
986:
987: /* update number of transferred bytes */
988: ad->cur_cmd->status = cpu_to_le32(le32_to_cpu(ad->cur_cmd->status) + size);
989:
990: out:
991: /* declare that we processed everything */
992: s->data_ptr = s->data_end;
993:
994: if (has_sglist) {
995: qemu_sglist_destroy(&s->sg);
996: }
997:
998: s->end_transfer_func(s);
999:
1000: if (!(s->status & DRQ_STAT)) {
1001: /* done with DMA */
1002: ahci_trigger_irq(ad->hba, ad, PORT_IRQ_STAT_DSS);
1003: }
1004:
1005: return 0;
1006: }
1007:
1008: static void ahci_start_dma(IDEDMA *dma, IDEState *s,
1009: BlockDriverCompletionFunc *dma_cb)
1010: {
1011: AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
1012:
1013: DPRINTF(ad->port_no, "\n");
1014: ad->dma_cb = dma_cb;
1015: ad->dma_status |= BM_STATUS_DMAING;
1016: dma_cb(s, 0);
1017: }
1018:
1019: static int ahci_dma_prepare_buf(IDEDMA *dma, int is_write)
1020: {
1021: AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
1022: IDEState *s = &ad->port.ifs[0];
1023: int i;
1024:
1025: ahci_populate_sglist(ad, &s->sg);
1026:
1027: s->io_buffer_size = 0;
1028: for (i = 0; i < s->sg.nsg; i++) {
1029: s->io_buffer_size += s->sg.sg[i].len;
1030: }
1031:
1032: DPRINTF(ad->port_no, "len=%#x\n", s->io_buffer_size);
1033: return s->io_buffer_size != 0;
1034: }
1035:
1036: static int ahci_dma_rw_buf(IDEDMA *dma, int is_write)
1037: {
1038: AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
1039: IDEState *s = &ad->port.ifs[0];
1040: uint8_t *p = s->io_buffer + s->io_buffer_index;
1041: int l = s->io_buffer_size - s->io_buffer_index;
1042:
1043: if (ahci_populate_sglist(ad, &s->sg)) {
1044: return 0;
1045: }
1046:
1047: if (is_write) {
1048: write_to_sglist(p, l, &s->sg);
1049: } else {
1050: read_from_sglist(p, l, &s->sg);
1051: }
1052:
1053: /* update number of transferred bytes */
1054: ad->cur_cmd->status = cpu_to_le32(le32_to_cpu(ad->cur_cmd->status) + l);
1055: s->io_buffer_index += l;
1056:
1057: DPRINTF(ad->port_no, "len=%#x\n", l);
1058:
1059: return 1;
1060: }
1061:
1062: static int ahci_dma_set_unit(IDEDMA *dma, int unit)
1063: {
1064: /* only a single unit per link */
1065: return 0;
1066: }
1067:
1068: static int ahci_dma_add_status(IDEDMA *dma, int status)
1069: {
1070: AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
1071: ad->dma_status |= status;
1072: DPRINTF(ad->port_no, "set status: %x\n", status);
1073:
1074: if (status & BM_STATUS_INT) {
1075: ahci_trigger_irq(ad->hba, ad, PORT_IRQ_STAT_DSS);
1076: }
1077:
1078: return 0;
1079: }
1080:
1081: static int ahci_dma_set_inactive(IDEDMA *dma)
1082: {
1083: AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
1084:
1085: DPRINTF(ad->port_no, "dma done\n");
1086:
1087: /* update d2h status */
1088: ahci_write_fis_d2h(ad, NULL);
1089:
1090: ad->dma_cb = NULL;
1091:
1.1.1.2 ! root 1092: if (!ad->check_bh) {
! 1093: /* maybe we still have something to process, check later */
! 1094: ad->check_bh = qemu_bh_new(ahci_check_cmd_bh, ad);
! 1095: qemu_bh_schedule(ad->check_bh);
! 1096: }
1.1 root 1097:
1098: return 0;
1099: }
1100:
1101: static void ahci_irq_set(void *opaque, int n, int level)
1102: {
1103: }
1104:
1105: static void ahci_dma_restart_cb(void *opaque, int running, int reason)
1106: {
1107: }
1108:
1109: static int ahci_dma_reset(IDEDMA *dma)
1110: {
1111: return 0;
1112: }
1113:
1114: static const IDEDMAOps ahci_dma_ops = {
1115: .start_dma = ahci_start_dma,
1116: .start_transfer = ahci_start_transfer,
1117: .prepare_buf = ahci_dma_prepare_buf,
1118: .rw_buf = ahci_dma_rw_buf,
1119: .set_unit = ahci_dma_set_unit,
1120: .add_status = ahci_dma_add_status,
1121: .set_inactive = ahci_dma_set_inactive,
1122: .restart_cb = ahci_dma_restart_cb,
1123: .reset = ahci_dma_reset,
1124: };
1125:
1126: void ahci_init(AHCIState *s, DeviceState *qdev, int ports)
1127: {
1128: qemu_irq *irqs;
1129: int i;
1130:
1131: s->ports = ports;
1132: s->dev = qemu_mallocz(sizeof(AHCIDevice) * ports);
1133: ahci_reg_init(s);
1134: s->mem = cpu_register_io_memory(ahci_readfn, ahci_writefn, s,
1135: DEVICE_LITTLE_ENDIAN);
1136: irqs = qemu_allocate_irqs(ahci_irq_set, s, s->ports);
1137:
1138: for (i = 0; i < s->ports; i++) {
1139: AHCIDevice *ad = &s->dev[i];
1140:
1141: ide_bus_new(&ad->port, qdev, i);
1142: ide_init2(&ad->port, irqs[i]);
1143:
1144: ad->hba = s;
1145: ad->port_no = i;
1146: ad->port.dma = &ad->dma;
1147: ad->port.dma->ops = &ahci_dma_ops;
1148: ad->port_regs.cmd = PORT_CMD_SPIN_UP | PORT_CMD_POWER_ON;
1149: }
1150: }
1151:
1152: void ahci_uninit(AHCIState *s)
1153: {
1154: qemu_free(s->dev);
1155: }
1156:
1157: void ahci_reset(void *opaque)
1158: {
1159: struct AHCIPCIState *d = opaque;
1160: int i;
1161:
1162: d->ahci.control_regs.irqstatus = 0;
1163: d->ahci.control_regs.ghc = 0;
1164:
1165: for (i = 0; i < d->ahci.ports; i++) {
1166: ahci_reset_port(&d->ahci, i);
1167: }
1168: }
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