2 * QEMU USB EHCI Emulation
4 * Copyright(c) 2008 Emutex Ltd. (address@hidden)
5 * Copyright(c) 2011-2012 Red Hat, Inc.
11 * EHCI project was started by Mark Burkley, with contributions by
12 * Niels de Vos. David S. Ahern continued working on it. Kevin Wolf,
13 * Jan Kiszka and Vincent Palatin contributed bugfixes.
16 * This library is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU Lesser General Public
18 * License as published by the Free Software Foundation; either
19 * version 2 of the License, or(at your option) any later version.
21 * This library is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
24 * Lesser General Public License for more details.
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, see <http://www.gnu.org/licenses/>.
30 #include "hw/usb/hcd-ehci.h"
32 /* Capability Registers Base Address - section 2.2 */
33 #define CAPLENGTH 0x0000 /* 1-byte, 0x0001 reserved */
34 #define HCIVERSION 0x0002 /* 2-bytes, i/f version # */
35 #define HCSPARAMS 0x0004 /* 4-bytes, structural params */
36 #define HCCPARAMS 0x0008 /* 4-bytes, capability params */
37 #define EECP HCCPARAMS + 1
38 #define HCSPPORTROUTE1 0x000c
39 #define HCSPPORTROUTE2 0x0010
42 #define USBCMD_RUNSTOP (1 << 0) // run / Stop
43 #define USBCMD_HCRESET (1 << 1) // HC Reset
44 #define USBCMD_FLS (3 << 2) // Frame List Size
45 #define USBCMD_FLS_SH 2 // Frame List Size Shift
46 #define USBCMD_PSE (1 << 4) // Periodic Schedule Enable
47 #define USBCMD_ASE (1 << 5) // Asynch Schedule Enable
48 #define USBCMD_IAAD (1 << 6) // Int Asynch Advance Doorbell
49 #define USBCMD_LHCR (1 << 7) // Light Host Controller Reset
50 #define USBCMD_ASPMC (3 << 8) // Async Sched Park Mode Count
51 #define USBCMD_ASPME (1 << 11) // Async Sched Park Mode Enable
52 #define USBCMD_ITC (0x7f << 16) // Int Threshold Control
53 #define USBCMD_ITC_SH 16 // Int Threshold Control Shift
56 #define USBSTS_RO_MASK 0x0000003f
57 #define USBSTS_INT (1 << 0) // USB Interrupt
58 #define USBSTS_ERRINT (1 << 1) // Error Interrupt
59 #define USBSTS_PCD (1 << 2) // Port Change Detect
60 #define USBSTS_FLR (1 << 3) // Frame List Rollover
61 #define USBSTS_HSE (1 << 4) // Host System Error
62 #define USBSTS_IAA (1 << 5) // Interrupt on Async Advance
63 #define USBSTS_HALT (1 << 12) // HC Halted
64 #define USBSTS_REC (1 << 13) // Reclamation
65 #define USBSTS_PSS (1 << 14) // Periodic Schedule Status
66 #define USBSTS_ASS (1 << 15) // Asynchronous Schedule Status
69 * Interrupt enable bits correspond to the interrupt active bits in USBSTS
70 * so no need to redefine here.
72 #define USBINTR 0x0008
73 #define USBINTR_MASK 0x0000003f
75 #define FRINDEX 0x000c
76 #define CTRLDSSEGMENT 0x0010
77 #define PERIODICLISTBASE 0x0014
78 #define ASYNCLISTADDR 0x0018
79 #define ASYNCLISTADDR_MASK 0xffffffe0
81 #define CONFIGFLAG 0x0040
84 * Bits that are reserved or are read-only are masked out of values
85 * written to us by software
87 #define PORTSC_RO_MASK 0x007001c0
88 #define PORTSC_RWC_MASK 0x0000002a
89 #define PORTSC_WKOC_E (1 << 22) // Wake on Over Current Enable
90 #define PORTSC_WKDS_E (1 << 21) // Wake on Disconnect Enable
91 #define PORTSC_WKCN_E (1 << 20) // Wake on Connect Enable
92 #define PORTSC_PTC (15 << 16) // Port Test Control
93 #define PORTSC_PTC_SH 16 // Port Test Control shift
94 #define PORTSC_PIC (3 << 14) // Port Indicator Control
95 #define PORTSC_PIC_SH 14 // Port Indicator Control Shift
96 #define PORTSC_POWNER (1 << 13) // Port Owner
97 #define PORTSC_PPOWER (1 << 12) // Port Power
98 #define PORTSC_LINESTAT (3 << 10) // Port Line Status
99 #define PORTSC_LINESTAT_SH 10 // Port Line Status Shift
100 #define PORTSC_PRESET (1 << 8) // Port Reset
101 #define PORTSC_SUSPEND (1 << 7) // Port Suspend
102 #define PORTSC_FPRES (1 << 6) // Force Port Resume
103 #define PORTSC_OCC (1 << 5) // Over Current Change
104 #define PORTSC_OCA (1 << 4) // Over Current Active
105 #define PORTSC_PEDC (1 << 3) // Port Enable/Disable Change
106 #define PORTSC_PED (1 << 2) // Port Enable/Disable
107 #define PORTSC_CSC (1 << 1) // Connect Status Change
108 #define PORTSC_CONNECT (1 << 0) // Current Connect Status
110 #define FRAME_TIMER_FREQ 1000
111 #define FRAME_TIMER_NS (1000000000 / FRAME_TIMER_FREQ)
112 #define UFRAME_TIMER_NS (FRAME_TIMER_NS / 8)
114 #define NB_MAXINTRATE 8 // Max rate at which controller issues ints
115 #define BUFF_SIZE 5*4096 // Max bytes to transfer per transaction
116 #define MAX_QH 100 // Max allowable queue heads in a chain
117 #define MIN_UFR_PER_TICK 24 /* Min frames to process when catching up */
118 #define PERIODIC_ACTIVE 512 /* Micro-frames */
120 /* Internal periodic / asynchronous schedule state machine states
127 /* The following states are internal to the state machine function
141 /* macros for accessing fields within next link pointer entry */
142 #define NLPTR_GET(x) ((x) & 0xffffffe0)
143 #define NLPTR_TYPE_GET(x) (((x) >> 1) & 3)
144 #define NLPTR_TBIT(x) ((x) & 1) // 1=invalid, 0=valid
146 /* link pointer types */
147 #define NLPTR_TYPE_ITD 0 // isoc xfer descriptor
148 #define NLPTR_TYPE_QH 1 // queue head
149 #define NLPTR_TYPE_STITD 2 // split xaction, isoc xfer descriptor
150 #define NLPTR_TYPE_FSTN 3 // frame span traversal node
152 #define SET_LAST_RUN_CLOCK(s) \
153 (s)->last_run_ns = qemu_get_clock_ns(vm_clock);
155 /* nifty macros from Arnon's EHCI version */
156 #define get_field(data, field) \
157 (((data) & field##_MASK) >> field##_SH)
159 #define set_field(data, newval, field) do { \
160 uint32_t val = *data; \
161 val &= ~ field##_MASK; \
162 val |= ((newval) << field##_SH) & field##_MASK; \
166 static const char *ehci_state_names[] = {
167 [EST_INACTIVE] = "INACTIVE",
168 [EST_ACTIVE] = "ACTIVE",
169 [EST_EXECUTING] = "EXECUTING",
170 [EST_SLEEPING] = "SLEEPING",
171 [EST_WAITLISTHEAD] = "WAITLISTHEAD",
172 [EST_FETCHENTRY] = "FETCH ENTRY",
173 [EST_FETCHQH] = "FETCH QH",
174 [EST_FETCHITD] = "FETCH ITD",
175 [EST_ADVANCEQUEUE] = "ADVANCEQUEUE",
176 [EST_FETCHQTD] = "FETCH QTD",
177 [EST_EXECUTE] = "EXECUTE",
178 [EST_WRITEBACK] = "WRITEBACK",
179 [EST_HORIZONTALQH] = "HORIZONTALQH",
182 static const char *ehci_mmio_names[] = {
185 [USBINTR] = "USBINTR",
186 [FRINDEX] = "FRINDEX",
187 [PERIODICLISTBASE] = "P-LIST BASE",
188 [ASYNCLISTADDR] = "A-LIST ADDR",
189 [CONFIGFLAG] = "CONFIGFLAG",
192 static int ehci_state_executing(EHCIQueue *q);
193 static int ehci_state_writeback(EHCIQueue *q);
194 static int ehci_state_advqueue(EHCIQueue *q);
195 static int ehci_fill_queue(EHCIPacket *p);
196 static void ehci_free_packet(EHCIPacket *p);
198 static const char *nr2str(const char **n, size_t len, uint32_t nr)
200 if (nr < len && n[nr] != NULL) {
207 static const char *state2str(uint32_t state)
209 return nr2str(ehci_state_names, ARRAY_SIZE(ehci_state_names), state);
212 static const char *addr2str(hwaddr addr)
214 return nr2str(ehci_mmio_names, ARRAY_SIZE(ehci_mmio_names), addr);
217 static void ehci_trace_usbsts(uint32_t mask, int state)
220 if (mask & USBSTS_INT) {
221 trace_usb_ehci_usbsts("INT", state);
223 if (mask & USBSTS_ERRINT) {
224 trace_usb_ehci_usbsts("ERRINT", state);
226 if (mask & USBSTS_PCD) {
227 trace_usb_ehci_usbsts("PCD", state);
229 if (mask & USBSTS_FLR) {
230 trace_usb_ehci_usbsts("FLR", state);
232 if (mask & USBSTS_HSE) {
233 trace_usb_ehci_usbsts("HSE", state);
235 if (mask & USBSTS_IAA) {
236 trace_usb_ehci_usbsts("IAA", state);
240 if (mask & USBSTS_HALT) {
241 trace_usb_ehci_usbsts("HALT", state);
243 if (mask & USBSTS_REC) {
244 trace_usb_ehci_usbsts("REC", state);
246 if (mask & USBSTS_PSS) {
247 trace_usb_ehci_usbsts("PSS", state);
249 if (mask & USBSTS_ASS) {
250 trace_usb_ehci_usbsts("ASS", state);
254 static inline void ehci_set_usbsts(EHCIState *s, int mask)
256 if ((s->usbsts & mask) == mask) {
259 ehci_trace_usbsts(mask, 1);
263 static inline void ehci_clear_usbsts(EHCIState *s, int mask)
265 if ((s->usbsts & mask) == 0) {
268 ehci_trace_usbsts(mask, 0);
272 /* update irq line */
273 static inline void ehci_update_irq(EHCIState *s)
277 if ((s->usbsts & USBINTR_MASK) & s->usbintr) {
281 trace_usb_ehci_irq(level, s->frindex, s->usbsts, s->usbintr);
282 qemu_set_irq(s->irq, level);
285 /* flag interrupt condition */
286 static inline void ehci_raise_irq(EHCIState *s, int intr)
288 if (intr & (USBSTS_PCD | USBSTS_FLR | USBSTS_HSE)) {
292 s->usbsts_pending |= intr;
297 * Commit pending interrupts (added via ehci_raise_irq),
298 * at the rate allowed by "Interrupt Threshold Control".
300 static inline void ehci_commit_irq(EHCIState *s)
304 if (!s->usbsts_pending) {
307 if (s->usbsts_frindex > s->frindex) {
311 itc = (s->usbcmd >> 16) & 0xff;
312 s->usbsts |= s->usbsts_pending;
313 s->usbsts_pending = 0;
314 s->usbsts_frindex = s->frindex + itc;
318 static void ehci_update_halt(EHCIState *s)
320 if (s->usbcmd & USBCMD_RUNSTOP) {
321 ehci_clear_usbsts(s, USBSTS_HALT);
323 if (s->astate == EST_INACTIVE && s->pstate == EST_INACTIVE) {
324 ehci_set_usbsts(s, USBSTS_HALT);
329 static void ehci_set_state(EHCIState *s, int async, int state)
332 trace_usb_ehci_state("async", state2str(state));
334 if (s->astate == EST_INACTIVE) {
335 ehci_clear_usbsts(s, USBSTS_ASS);
338 ehci_set_usbsts(s, USBSTS_ASS);
341 trace_usb_ehci_state("periodic", state2str(state));
343 if (s->pstate == EST_INACTIVE) {
344 ehci_clear_usbsts(s, USBSTS_PSS);
347 ehci_set_usbsts(s, USBSTS_PSS);
352 static int ehci_get_state(EHCIState *s, int async)
354 return async ? s->astate : s->pstate;
357 static void ehci_set_fetch_addr(EHCIState *s, int async, uint32_t addr)
360 s->a_fetch_addr = addr;
362 s->p_fetch_addr = addr;
366 static int ehci_get_fetch_addr(EHCIState *s, int async)
368 return async ? s->a_fetch_addr : s->p_fetch_addr;
371 static void ehci_trace_qh(EHCIQueue *q, hwaddr addr, EHCIqh *qh)
373 /* need three here due to argument count limits */
374 trace_usb_ehci_qh_ptrs(q, addr, qh->next,
375 qh->current_qtd, qh->next_qtd, qh->altnext_qtd);
376 trace_usb_ehci_qh_fields(addr,
377 get_field(qh->epchar, QH_EPCHAR_RL),
378 get_field(qh->epchar, QH_EPCHAR_MPLEN),
379 get_field(qh->epchar, QH_EPCHAR_EPS),
380 get_field(qh->epchar, QH_EPCHAR_EP),
381 get_field(qh->epchar, QH_EPCHAR_DEVADDR));
382 trace_usb_ehci_qh_bits(addr,
383 (bool)(qh->epchar & QH_EPCHAR_C),
384 (bool)(qh->epchar & QH_EPCHAR_H),
385 (bool)(qh->epchar & QH_EPCHAR_DTC),
386 (bool)(qh->epchar & QH_EPCHAR_I));
389 static void ehci_trace_qtd(EHCIQueue *q, hwaddr addr, EHCIqtd *qtd)
391 /* need three here due to argument count limits */
392 trace_usb_ehci_qtd_ptrs(q, addr, qtd->next, qtd->altnext);
393 trace_usb_ehci_qtd_fields(addr,
394 get_field(qtd->token, QTD_TOKEN_TBYTES),
395 get_field(qtd->token, QTD_TOKEN_CPAGE),
396 get_field(qtd->token, QTD_TOKEN_CERR),
397 get_field(qtd->token, QTD_TOKEN_PID));
398 trace_usb_ehci_qtd_bits(addr,
399 (bool)(qtd->token & QTD_TOKEN_IOC),
400 (bool)(qtd->token & QTD_TOKEN_ACTIVE),
401 (bool)(qtd->token & QTD_TOKEN_HALT),
402 (bool)(qtd->token & QTD_TOKEN_BABBLE),
403 (bool)(qtd->token & QTD_TOKEN_XACTERR));
406 static void ehci_trace_itd(EHCIState *s, hwaddr addr, EHCIitd *itd)
408 trace_usb_ehci_itd(addr, itd->next,
409 get_field(itd->bufptr[1], ITD_BUFPTR_MAXPKT),
410 get_field(itd->bufptr[2], ITD_BUFPTR_MULT),
411 get_field(itd->bufptr[0], ITD_BUFPTR_EP),
412 get_field(itd->bufptr[0], ITD_BUFPTR_DEVADDR));
415 static void ehci_trace_sitd(EHCIState *s, hwaddr addr,
418 trace_usb_ehci_sitd(addr, sitd->next,
419 (bool)(sitd->results & SITD_RESULTS_ACTIVE));
422 static void ehci_trace_guest_bug(EHCIState *s, const char *message)
424 trace_usb_ehci_guest_bug(message);
425 fprintf(stderr, "ehci warning: %s\n", message);
428 static inline bool ehci_enabled(EHCIState *s)
430 return s->usbcmd & USBCMD_RUNSTOP;
433 static inline bool ehci_async_enabled(EHCIState *s)
435 return ehci_enabled(s) && (s->usbcmd & USBCMD_ASE);
438 static inline bool ehci_periodic_enabled(EHCIState *s)
440 return ehci_enabled(s) && (s->usbcmd & USBCMD_PSE);
443 /* Get an array of dwords from main memory */
444 static inline int get_dwords(EHCIState *ehci, uint32_t addr,
445 uint32_t *buf, int num)
450 ehci_raise_irq(ehci, USBSTS_HSE);
451 ehci->usbcmd &= ~USBCMD_RUNSTOP;
452 trace_usb_ehci_dma_error();
456 for (i = 0; i < num; i++, buf++, addr += sizeof(*buf)) {
457 dma_memory_read(ehci->dma, addr, buf, sizeof(*buf));
458 *buf = le32_to_cpu(*buf);
464 /* Put an array of dwords in to main memory */
465 static inline int put_dwords(EHCIState *ehci, uint32_t addr,
466 uint32_t *buf, int num)
471 ehci_raise_irq(ehci, USBSTS_HSE);
472 ehci->usbcmd &= ~USBCMD_RUNSTOP;
473 trace_usb_ehci_dma_error();
477 for (i = 0; i < num; i++, buf++, addr += sizeof(*buf)) {
478 uint32_t tmp = cpu_to_le32(*buf);
479 dma_memory_write(ehci->dma, addr, &tmp, sizeof(tmp));
485 static int ehci_get_pid(EHCIqtd *qtd)
487 switch (get_field(qtd->token, QTD_TOKEN_PID)) {
489 return USB_TOKEN_OUT;
493 return USB_TOKEN_SETUP;
495 fprintf(stderr, "bad token\n");
500 static bool ehci_verify_qh(EHCIQueue *q, EHCIqh *qh)
502 uint32_t devaddr = get_field(qh->epchar, QH_EPCHAR_DEVADDR);
503 uint32_t endp = get_field(qh->epchar, QH_EPCHAR_EP);
504 if ((devaddr != get_field(q->qh.epchar, QH_EPCHAR_DEVADDR)) ||
505 (endp != get_field(q->qh.epchar, QH_EPCHAR_EP)) ||
506 (qh->current_qtd != q->qh.current_qtd) ||
507 (q->async && qh->next_qtd != q->qh.next_qtd) ||
508 (memcmp(&qh->altnext_qtd, &q->qh.altnext_qtd,
509 7 * sizeof(uint32_t)) != 0) ||
510 (q->dev != NULL && q->dev->addr != devaddr)) {
517 static bool ehci_verify_qtd(EHCIPacket *p, EHCIqtd *qtd)
519 if (p->qtdaddr != p->queue->qtdaddr ||
520 (p->queue->async && !NLPTR_TBIT(p->qtd.next) &&
521 (p->qtd.next != qtd->next)) ||
522 (!NLPTR_TBIT(p->qtd.altnext) && (p->qtd.altnext != qtd->altnext)) ||
523 p->qtd.token != qtd->token ||
524 p->qtd.bufptr[0] != qtd->bufptr[0]) {
531 static bool ehci_verify_pid(EHCIQueue *q, EHCIqtd *qtd)
533 int ep = get_field(q->qh.epchar, QH_EPCHAR_EP);
534 int pid = ehci_get_pid(qtd);
536 /* Note the pid changing is normal for ep 0 (the control ep) */
537 if (q->last_pid && ep != 0 && pid != q->last_pid) {
544 /* Finish executing and writeback a packet outside of the regular
545 fetchqh -> fetchqtd -> execute -> writeback cycle */
546 static void ehci_writeback_async_complete_packet(EHCIPacket *p)
548 EHCIQueue *q = p->queue;
553 /* Verify the qh + qtd, like we do when going through fetchqh & fetchqtd */
554 get_dwords(q->ehci, NLPTR_GET(q->qhaddr),
555 (uint32_t *) &qh, sizeof(EHCIqh) >> 2);
556 get_dwords(q->ehci, NLPTR_GET(q->qtdaddr),
557 (uint32_t *) &qtd, sizeof(EHCIqtd) >> 2);
558 if (!ehci_verify_qh(q, &qh) || !ehci_verify_qtd(p, &qtd)) {
559 p->async = EHCI_ASYNC_INITIALIZED;
564 state = ehci_get_state(q->ehci, q->async);
565 ehci_state_executing(q);
566 ehci_state_writeback(q); /* Frees the packet! */
567 if (!(q->qh.token & QTD_TOKEN_HALT)) {
568 ehci_state_advqueue(q);
570 ehci_set_state(q->ehci, q->async, state);
573 /* packet management */
575 static EHCIPacket *ehci_alloc_packet(EHCIQueue *q)
579 p = g_new0(EHCIPacket, 1);
581 usb_packet_init(&p->packet);
582 QTAILQ_INSERT_TAIL(&q->packets, p, next);
583 trace_usb_ehci_packet_action(p->queue, p, "alloc");
587 static void ehci_free_packet(EHCIPacket *p)
589 if (p->async == EHCI_ASYNC_FINISHED) {
590 ehci_writeback_async_complete_packet(p);
593 trace_usb_ehci_packet_action(p->queue, p, "free");
594 if (p->async == EHCI_ASYNC_INITIALIZED) {
595 usb_packet_unmap(&p->packet, &p->sgl);
596 qemu_sglist_destroy(&p->sgl);
598 if (p->async == EHCI_ASYNC_INFLIGHT) {
599 usb_cancel_packet(&p->packet);
600 usb_packet_unmap(&p->packet, &p->sgl);
601 qemu_sglist_destroy(&p->sgl);
603 QTAILQ_REMOVE(&p->queue->packets, p, next);
604 usb_packet_cleanup(&p->packet);
608 /* queue management */
610 static EHCIQueue *ehci_alloc_queue(EHCIState *ehci, uint32_t addr, int async)
612 EHCIQueueHead *head = async ? &ehci->aqueues : &ehci->pqueues;
615 q = g_malloc0(sizeof(*q));
619 QTAILQ_INIT(&q->packets);
620 QTAILQ_INSERT_HEAD(head, q, next);
621 trace_usb_ehci_queue_action(q, "alloc");
625 static void ehci_queue_stopped(EHCIQueue *q)
627 int endp = get_field(q->qh.epchar, QH_EPCHAR_EP);
629 if (!q->last_pid || !q->dev) {
633 usb_device_ep_stopped(q->dev, usb_ep_get(q->dev, q->last_pid, endp));
636 static int ehci_cancel_queue(EHCIQueue *q)
641 p = QTAILQ_FIRST(&q->packets);
646 trace_usb_ehci_queue_action(q, "cancel");
650 } while ((p = QTAILQ_FIRST(&q->packets)) != NULL);
653 ehci_queue_stopped(q);
657 static int ehci_reset_queue(EHCIQueue *q)
661 trace_usb_ehci_queue_action(q, "reset");
662 packets = ehci_cancel_queue(q);
669 static void ehci_free_queue(EHCIQueue *q, const char *warn)
671 EHCIQueueHead *head = q->async ? &q->ehci->aqueues : &q->ehci->pqueues;
674 trace_usb_ehci_queue_action(q, "free");
675 cancelled = ehci_cancel_queue(q);
676 if (warn && cancelled > 0) {
677 ehci_trace_guest_bug(q->ehci, warn);
679 QTAILQ_REMOVE(head, q, next);
683 static EHCIQueue *ehci_find_queue_by_qh(EHCIState *ehci, uint32_t addr,
686 EHCIQueueHead *head = async ? &ehci->aqueues : &ehci->pqueues;
689 QTAILQ_FOREACH(q, head, next) {
690 if (addr == q->qhaddr) {
697 static void ehci_queues_rip_unused(EHCIState *ehci, int async)
699 EHCIQueueHead *head = async ? &ehci->aqueues : &ehci->pqueues;
700 const char *warn = async ? "guest unlinked busy QH" : NULL;
701 uint64_t maxage = FRAME_TIMER_NS * ehci->maxframes * 4;
704 QTAILQ_FOREACH_SAFE(q, head, next, tmp) {
707 q->ts = ehci->last_run_ns;
710 if (ehci->last_run_ns < q->ts + maxage) {
713 ehci_free_queue(q, warn);
717 static void ehci_queues_rip_unseen(EHCIState *ehci, int async)
719 EHCIQueueHead *head = async ? &ehci->aqueues : &ehci->pqueues;
722 QTAILQ_FOREACH_SAFE(q, head, next, tmp) {
724 ehci_free_queue(q, NULL);
729 static void ehci_queues_rip_device(EHCIState *ehci, USBDevice *dev, int async)
731 EHCIQueueHead *head = async ? &ehci->aqueues : &ehci->pqueues;
734 QTAILQ_FOREACH_SAFE(q, head, next, tmp) {
738 ehci_free_queue(q, NULL);
742 static void ehci_queues_rip_all(EHCIState *ehci, int async)
744 EHCIQueueHead *head = async ? &ehci->aqueues : &ehci->pqueues;
745 const char *warn = async ? "guest stopped busy async schedule" : NULL;
748 QTAILQ_FOREACH_SAFE(q, head, next, tmp) {
749 ehci_free_queue(q, warn);
753 /* Attach or detach a device on root hub */
755 static void ehci_attach(USBPort *port)
757 EHCIState *s = port->opaque;
758 uint32_t *portsc = &s->portsc[port->index];
759 const char *owner = (*portsc & PORTSC_POWNER) ? "comp" : "ehci";
761 trace_usb_ehci_port_attach(port->index, owner, port->dev->product_desc);
763 if (*portsc & PORTSC_POWNER) {
764 USBPort *companion = s->companion_ports[port->index];
765 companion->dev = port->dev;
766 companion->ops->attach(companion);
770 *portsc |= PORTSC_CONNECT;
771 *portsc |= PORTSC_CSC;
773 ehci_raise_irq(s, USBSTS_PCD);
776 static void ehci_detach(USBPort *port)
778 EHCIState *s = port->opaque;
779 uint32_t *portsc = &s->portsc[port->index];
780 const char *owner = (*portsc & PORTSC_POWNER) ? "comp" : "ehci";
782 trace_usb_ehci_port_detach(port->index, owner);
784 if (*portsc & PORTSC_POWNER) {
785 USBPort *companion = s->companion_ports[port->index];
786 companion->ops->detach(companion);
787 companion->dev = NULL;
789 * EHCI spec 4.2.2: "When a disconnect occurs... On the event,
790 * the port ownership is returned immediately to the EHCI controller."
792 *portsc &= ~PORTSC_POWNER;
796 ehci_queues_rip_device(s, port->dev, 0);
797 ehci_queues_rip_device(s, port->dev, 1);
799 *portsc &= ~(PORTSC_CONNECT|PORTSC_PED);
800 *portsc |= PORTSC_CSC;
802 ehci_raise_irq(s, USBSTS_PCD);
805 static void ehci_child_detach(USBPort *port, USBDevice *child)
807 EHCIState *s = port->opaque;
808 uint32_t portsc = s->portsc[port->index];
810 if (portsc & PORTSC_POWNER) {
811 USBPort *companion = s->companion_ports[port->index];
812 companion->ops->child_detach(companion, child);
816 ehci_queues_rip_device(s, child, 0);
817 ehci_queues_rip_device(s, child, 1);
820 static void ehci_wakeup(USBPort *port)
822 EHCIState *s = port->opaque;
823 uint32_t portsc = s->portsc[port->index];
825 if (portsc & PORTSC_POWNER) {
826 USBPort *companion = s->companion_ports[port->index];
827 if (companion->ops->wakeup) {
828 companion->ops->wakeup(companion);
833 qemu_bh_schedule(s->async_bh);
836 static int ehci_register_companion(USBBus *bus, USBPort *ports[],
837 uint32_t portcount, uint32_t firstport)
839 EHCIState *s = container_of(bus, EHCIState, bus);
842 if (firstport + portcount > NB_PORTS) {
843 qerror_report(QERR_INVALID_PARAMETER_VALUE, "firstport",
844 "firstport on masterbus");
845 error_printf_unless_qmp(
846 "firstport value of %u makes companion take ports %u - %u, which "
847 "is outside of the valid range of 0 - %u\n", firstport, firstport,
848 firstport + portcount - 1, NB_PORTS - 1);
852 for (i = 0; i < portcount; i++) {
853 if (s->companion_ports[firstport + i]) {
854 qerror_report(QERR_INVALID_PARAMETER_VALUE, "masterbus",
856 error_printf_unless_qmp(
857 "port %u on masterbus %s already has a companion assigned\n",
858 firstport + i, bus->qbus.name);
863 for (i = 0; i < portcount; i++) {
864 s->companion_ports[firstport + i] = ports[i];
865 s->ports[firstport + i].speedmask |=
866 USB_SPEED_MASK_LOW | USB_SPEED_MASK_FULL;
867 /* Ensure devs attached before the initial reset go to the companion */
868 s->portsc[firstport + i] = PORTSC_POWNER;
871 s->companion_count++;
872 s->caps[0x05] = (s->companion_count << 4) | portcount;
877 static void ehci_wakeup_endpoint(USBBus *bus, USBEndpoint *ep)
879 EHCIState *s = container_of(bus, EHCIState, bus);
880 uint32_t portsc = s->portsc[ep->dev->port->index];
882 if (portsc & PORTSC_POWNER) {
886 s->periodic_sched_active = PERIODIC_ACTIVE;
887 qemu_bh_schedule(s->async_bh);
890 static USBDevice *ehci_find_device(EHCIState *ehci, uint8_t addr)
896 for (i = 0; i < NB_PORTS; i++) {
897 port = &ehci->ports[i];
898 if (!(ehci->portsc[i] & PORTSC_PED)) {
899 DPRINTF("Port %d not enabled\n", i);
902 dev = usb_find_device(port, addr);
910 /* 4.1 host controller initialization */
911 static void ehci_reset(void *opaque)
913 EHCIState *s = opaque;
915 USBDevice *devs[NB_PORTS];
917 trace_usb_ehci_reset();
920 * Do the detach before touching portsc, so that it correctly gets send to
921 * us or to our companion based on PORTSC_POWNER before the reset.
923 for(i = 0; i < NB_PORTS; i++) {
924 devs[i] = s->ports[i].dev;
925 if (devs[i] && devs[i]->attached) {
926 usb_detach(&s->ports[i]);
930 memset(&s->opreg, 0x00, sizeof(s->opreg));
931 memset(&s->portsc, 0x00, sizeof(s->portsc));
933 s->usbcmd = NB_MAXINTRATE << USBCMD_ITC_SH;
934 s->usbsts = USBSTS_HALT;
935 s->usbsts_pending = 0;
936 s->usbsts_frindex = 0;
938 s->astate = EST_INACTIVE;
939 s->pstate = EST_INACTIVE;
941 for(i = 0; i < NB_PORTS; i++) {
942 if (s->companion_ports[i]) {
943 s->portsc[i] = PORTSC_POWNER | PORTSC_PPOWER;
945 s->portsc[i] = PORTSC_PPOWER;
947 if (devs[i] && devs[i]->attached) {
948 usb_attach(&s->ports[i]);
949 usb_device_reset(devs[i]);
952 ehci_queues_rip_all(s, 0);
953 ehci_queues_rip_all(s, 1);
954 qemu_del_timer(s->frame_timer);
955 qemu_bh_cancel(s->async_bh);
958 static uint64_t ehci_caps_read(void *ptr, hwaddr addr,
962 return s->caps[addr];
965 static uint64_t ehci_opreg_read(void *ptr, hwaddr addr,
973 /* Round down to mult of 8, else it can go backwards on migration */
974 val = s->frindex & ~7;
977 val = s->opreg[addr >> 2];
980 trace_usb_ehci_opreg_read(addr + s->opregbase, addr2str(addr), val);
984 static uint64_t ehci_port_read(void *ptr, hwaddr addr,
990 val = s->portsc[addr >> 2];
991 trace_usb_ehci_portsc_read(addr + PORTSC_BEGIN, addr >> 2, val);
995 static void handle_port_owner_write(EHCIState *s, int port, uint32_t owner)
997 USBDevice *dev = s->ports[port].dev;
998 uint32_t *portsc = &s->portsc[port];
1001 if (s->companion_ports[port] == NULL)
1004 owner = owner & PORTSC_POWNER;
1005 orig = *portsc & PORTSC_POWNER;
1007 if (!(owner ^ orig)) {
1011 if (dev && dev->attached) {
1012 usb_detach(&s->ports[port]);
1015 *portsc &= ~PORTSC_POWNER;
1018 if (dev && dev->attached) {
1019 usb_attach(&s->ports[port]);
1023 static void ehci_port_write(void *ptr, hwaddr addr,
1024 uint64_t val, unsigned size)
1027 int port = addr >> 2;
1028 uint32_t *portsc = &s->portsc[port];
1029 uint32_t old = *portsc;
1030 USBDevice *dev = s->ports[port].dev;
1032 trace_usb_ehci_portsc_write(addr + PORTSC_BEGIN, addr >> 2, val);
1034 /* Clear rwc bits */
1035 *portsc &= ~(val & PORTSC_RWC_MASK);
1036 /* The guest may clear, but not set the PED bit */
1037 *portsc &= val | ~PORTSC_PED;
1038 /* POWNER is masked out by RO_MASK as it is RO when we've no companion */
1039 handle_port_owner_write(s, port, val);
1040 /* And finally apply RO_MASK */
1041 val &= PORTSC_RO_MASK;
1043 if ((val & PORTSC_PRESET) && !(*portsc & PORTSC_PRESET)) {
1044 trace_usb_ehci_port_reset(port, 1);
1047 if (!(val & PORTSC_PRESET) &&(*portsc & PORTSC_PRESET)) {
1048 trace_usb_ehci_port_reset(port, 0);
1049 if (dev && dev->attached) {
1050 usb_port_reset(&s->ports[port]);
1051 *portsc &= ~PORTSC_CSC;
1055 * Table 2.16 Set the enable bit(and enable bit change) to indicate
1056 * to SW that this port has a high speed device attached
1058 if (dev && dev->attached && (dev->speedmask & USB_SPEED_MASK_HIGH)) {
1063 *portsc &= ~PORTSC_RO_MASK;
1065 trace_usb_ehci_portsc_change(addr + PORTSC_BEGIN, addr >> 2, *portsc, old);
1068 static void ehci_opreg_write(void *ptr, hwaddr addr,
1069 uint64_t val, unsigned size)
1072 uint32_t *mmio = s->opreg + (addr >> 2);
1073 uint32_t old = *mmio;
1076 trace_usb_ehci_opreg_write(addr + s->opregbase, addr2str(addr), val);
1080 if (val & USBCMD_HCRESET) {
1086 /* not supporting dynamic frame list size at the moment */
1087 if ((val & USBCMD_FLS) && !(s->usbcmd & USBCMD_FLS)) {
1088 fprintf(stderr, "attempt to set frame list size -- value %d\n",
1089 (int)val & USBCMD_FLS);
1093 if (val & USBCMD_IAAD) {
1095 * Process IAAD immediately, otherwise the Linux IAAD watchdog may
1096 * trigger and re-use a qh without us seeing the unlink.
1098 s->async_stepdown = 0;
1099 qemu_bh_schedule(s->async_bh);
1100 trace_usb_ehci_doorbell_ring();
1103 if (((USBCMD_RUNSTOP | USBCMD_PSE | USBCMD_ASE) & val) !=
1104 ((USBCMD_RUNSTOP | USBCMD_PSE | USBCMD_ASE) & s->usbcmd)) {
1105 if (s->pstate == EST_INACTIVE) {
1106 SET_LAST_RUN_CLOCK(s);
1108 s->usbcmd = val; /* Set usbcmd for ehci_update_halt() */
1109 ehci_update_halt(s);
1110 s->async_stepdown = 0;
1111 qemu_bh_schedule(s->async_bh);
1116 val &= USBSTS_RO_MASK; // bits 6 through 31 are RO
1117 ehci_clear_usbsts(s, val); // bits 0 through 5 are R/WC
1123 val &= USBINTR_MASK;
1124 if (ehci_enabled(s) && (USBSTS_FLR & val)) {
1125 qemu_bh_schedule(s->async_bh);
1130 val &= 0x00003fff; /* frindex is 14bits */
1131 s->usbsts_frindex = val;
1137 for(i = 0; i < NB_PORTS; i++)
1138 handle_port_owner_write(s, i, 0);
1142 case PERIODICLISTBASE:
1143 if (ehci_periodic_enabled(s)) {
1145 "ehci: PERIODIC list base register set while periodic schedule\n"
1146 " is enabled and HC is enabled\n");
1151 if (ehci_async_enabled(s)) {
1153 "ehci: ASYNC list address register set while async schedule\n"
1154 " is enabled and HC is enabled\n");
1160 trace_usb_ehci_opreg_change(addr + s->opregbase, addr2str(addr),
1165 * Write the qh back to guest physical memory. This step isn't
1166 * in the EHCI spec but we need to do it since we don't share
1167 * physical memory with our guest VM.
1169 * The first three dwords are read-only for the EHCI, so skip them
1170 * when writing back the qh.
1172 static void ehci_flush_qh(EHCIQueue *q)
1174 uint32_t *qh = (uint32_t *) &q->qh;
1175 uint32_t dwords = sizeof(EHCIqh) >> 2;
1176 uint32_t addr = NLPTR_GET(q->qhaddr);
1178 put_dwords(q->ehci, addr + 3 * sizeof(uint32_t), qh + 3, dwords - 3);
1183 static int ehci_qh_do_overlay(EHCIQueue *q)
1185 EHCIPacket *p = QTAILQ_FIRST(&q->packets);
1193 assert(p->qtdaddr == q->qtdaddr);
1195 // remember values in fields to preserve in qh after overlay
1197 dtoggle = q->qh.token & QTD_TOKEN_DTOGGLE;
1198 ping = q->qh.token & QTD_TOKEN_PING;
1200 q->qh.current_qtd = p->qtdaddr;
1201 q->qh.next_qtd = p->qtd.next;
1202 q->qh.altnext_qtd = p->qtd.altnext;
1203 q->qh.token = p->qtd.token;
1206 eps = get_field(q->qh.epchar, QH_EPCHAR_EPS);
1207 if (eps == EHCI_QH_EPS_HIGH) {
1208 q->qh.token &= ~QTD_TOKEN_PING;
1209 q->qh.token |= ping;
1212 reload = get_field(q->qh.epchar, QH_EPCHAR_RL);
1213 set_field(&q->qh.altnext_qtd, reload, QH_ALTNEXT_NAKCNT);
1215 for (i = 0; i < 5; i++) {
1216 q->qh.bufptr[i] = p->qtd.bufptr[i];
1219 if (!(q->qh.epchar & QH_EPCHAR_DTC)) {
1220 // preserve QH DT bit
1221 q->qh.token &= ~QTD_TOKEN_DTOGGLE;
1222 q->qh.token |= dtoggle;
1225 q->qh.bufptr[1] &= ~BUFPTR_CPROGMASK_MASK;
1226 q->qh.bufptr[2] &= ~BUFPTR_FRAMETAG_MASK;
1233 static int ehci_init_transfer(EHCIPacket *p)
1235 uint32_t cpage, offset, bytes, plen;
1238 cpage = get_field(p->qtd.token, QTD_TOKEN_CPAGE);
1239 bytes = get_field(p->qtd.token, QTD_TOKEN_TBYTES);
1240 offset = p->qtd.bufptr[0] & ~QTD_BUFPTR_MASK;
1241 qemu_sglist_init(&p->sgl, 5, p->queue->ehci->dma);
1245 fprintf(stderr, "cpage out of range (%d)\n", cpage);
1249 page = p->qtd.bufptr[cpage] & QTD_BUFPTR_MASK;
1252 if (plen > 4096 - offset) {
1253 plen = 4096 - offset;
1258 qemu_sglist_add(&p->sgl, page, plen);
1264 static void ehci_finish_transfer(EHCIQueue *q, int len)
1266 uint32_t cpage, offset;
1269 /* update cpage & offset */
1270 cpage = get_field(q->qh.token, QTD_TOKEN_CPAGE);
1271 offset = q->qh.bufptr[0] & ~QTD_BUFPTR_MASK;
1274 cpage += offset >> QTD_BUFPTR_SH;
1275 offset &= ~QTD_BUFPTR_MASK;
1277 set_field(&q->qh.token, cpage, QTD_TOKEN_CPAGE);
1278 q->qh.bufptr[0] &= QTD_BUFPTR_MASK;
1279 q->qh.bufptr[0] |= offset;
1283 static void ehci_async_complete_packet(USBPort *port, USBPacket *packet)
1286 EHCIState *s = port->opaque;
1287 uint32_t portsc = s->portsc[port->index];
1289 if (portsc & PORTSC_POWNER) {
1290 USBPort *companion = s->companion_ports[port->index];
1291 companion->ops->complete(companion, packet);
1295 p = container_of(packet, EHCIPacket, packet);
1296 assert(p->async == EHCI_ASYNC_INFLIGHT);
1298 if (packet->status == USB_RET_REMOVE_FROM_QUEUE) {
1299 trace_usb_ehci_packet_action(p->queue, p, "remove");
1300 ehci_free_packet(p);
1304 trace_usb_ehci_packet_action(p->queue, p, "wakeup");
1305 p->async = EHCI_ASYNC_FINISHED;
1307 if (!p->queue->async) {
1308 s->periodic_sched_active = PERIODIC_ACTIVE;
1310 qemu_bh_schedule(s->async_bh);
1313 static void ehci_execute_complete(EHCIQueue *q)
1315 EHCIPacket *p = QTAILQ_FIRST(&q->packets);
1319 assert(p->qtdaddr == q->qtdaddr);
1320 assert(p->async == EHCI_ASYNC_INITIALIZED ||
1321 p->async == EHCI_ASYNC_FINISHED);
1323 DPRINTF("execute_complete: qhaddr 0x%x, next 0x%x, qtdaddr 0x%x, "
1324 "status %d, actual_length %d\n",
1325 q->qhaddr, q->qh.next, q->qtdaddr,
1326 p->packet.status, p->packet.actual_length);
1328 switch (p->packet.status) {
1329 case USB_RET_SUCCESS:
1331 case USB_RET_IOERROR:
1333 q->qh.token |= (QTD_TOKEN_HALT | QTD_TOKEN_XACTERR);
1334 set_field(&q->qh.token, 0, QTD_TOKEN_CERR);
1335 ehci_raise_irq(q->ehci, USBSTS_ERRINT);
1338 q->qh.token |= QTD_TOKEN_HALT;
1339 ehci_raise_irq(q->ehci, USBSTS_ERRINT);
1342 set_field(&q->qh.altnext_qtd, 0, QH_ALTNEXT_NAKCNT);
1343 return; /* We're not done yet with this transaction */
1344 case USB_RET_BABBLE:
1345 q->qh.token |= (QTD_TOKEN_HALT | QTD_TOKEN_BABBLE);
1346 ehci_raise_irq(q->ehci, USBSTS_ERRINT);
1349 /* should not be triggerable */
1350 fprintf(stderr, "USB invalid response %d\n", p->packet.status);
1355 /* TODO check 4.12 for splits */
1356 tbytes = get_field(q->qh.token, QTD_TOKEN_TBYTES);
1357 if (tbytes && p->pid == USB_TOKEN_IN) {
1358 tbytes -= p->packet.actual_length;
1360 /* 4.15.1.2 must raise int on a short input packet */
1361 ehci_raise_irq(q->ehci, USBSTS_INT);
1363 q->ehci->int_req_by_async = true;
1369 DPRINTF("updating tbytes to %d\n", tbytes);
1370 set_field(&q->qh.token, tbytes, QTD_TOKEN_TBYTES);
1372 ehci_finish_transfer(q, p->packet.actual_length);
1373 usb_packet_unmap(&p->packet, &p->sgl);
1374 qemu_sglist_destroy(&p->sgl);
1375 p->async = EHCI_ASYNC_NONE;
1377 q->qh.token ^= QTD_TOKEN_DTOGGLE;
1378 q->qh.token &= ~QTD_TOKEN_ACTIVE;
1380 if (q->qh.token & QTD_TOKEN_IOC) {
1381 ehci_raise_irq(q->ehci, USBSTS_INT);
1383 q->ehci->int_req_by_async = true;
1388 /* 4.10.3 returns "again" */
1389 static int ehci_execute(EHCIPacket *p, const char *action)
1395 assert(p->async == EHCI_ASYNC_NONE ||
1396 p->async == EHCI_ASYNC_INITIALIZED);
1398 if (!(p->qtd.token & QTD_TOKEN_ACTIVE)) {
1399 fprintf(stderr, "Attempting to execute inactive qtd\n");
1403 if (get_field(p->qtd.token, QTD_TOKEN_TBYTES) > BUFF_SIZE) {
1404 ehci_trace_guest_bug(p->queue->ehci,
1405 "guest requested more bytes than allowed");
1409 if (!ehci_verify_pid(p->queue, &p->qtd)) {
1410 ehci_queue_stopped(p->queue); /* Mark the ep in the prev dir stopped */
1412 p->pid = ehci_get_pid(&p->qtd);
1413 p->queue->last_pid = p->pid;
1414 endp = get_field(p->queue->qh.epchar, QH_EPCHAR_EP);
1415 ep = usb_ep_get(p->queue->dev, p->pid, endp);
1417 if (p->async == EHCI_ASYNC_NONE) {
1418 if (ehci_init_transfer(p) != 0) {
1422 spd = (p->pid == USB_TOKEN_IN && NLPTR_TBIT(p->qtd.altnext) == 0);
1423 usb_packet_setup(&p->packet, p->pid, ep, p->qtdaddr, spd,
1424 (p->qtd.token & QTD_TOKEN_IOC) != 0);
1425 usb_packet_map(&p->packet, &p->sgl);
1426 p->async = EHCI_ASYNC_INITIALIZED;
1429 trace_usb_ehci_packet_action(p->queue, p, action);
1430 usb_handle_packet(p->queue->dev, &p->packet);
1431 DPRINTF("submit: qh 0x%x next 0x%x qtd 0x%x pid 0x%x len %zd endp 0x%x "
1432 "status %d actual_length %d\n", p->queue->qhaddr, p->qtd.next,
1433 p->qtdaddr, p->pid, p->packet.iov.size, endp, p->packet.status,
1434 p->packet.actual_length);
1436 if (p->packet.actual_length > BUFF_SIZE) {
1437 fprintf(stderr, "ret from usb_handle_packet > BUFF_SIZE\n");
1447 static int ehci_process_itd(EHCIState *ehci,
1453 uint32_t i, len, pid, dir, devaddr, endp;
1454 uint32_t pg, off, ptr1, ptr2, max, mult;
1456 ehci->periodic_sched_active = PERIODIC_ACTIVE;
1458 dir =(itd->bufptr[1] & ITD_BUFPTR_DIRECTION);
1459 devaddr = get_field(itd->bufptr[0], ITD_BUFPTR_DEVADDR);
1460 endp = get_field(itd->bufptr[0], ITD_BUFPTR_EP);
1461 max = get_field(itd->bufptr[1], ITD_BUFPTR_MAXPKT);
1462 mult = get_field(itd->bufptr[2], ITD_BUFPTR_MULT);
1464 for(i = 0; i < 8; i++) {
1465 if (itd->transact[i] & ITD_XACT_ACTIVE) {
1466 pg = get_field(itd->transact[i], ITD_XACT_PGSEL);
1467 off = itd->transact[i] & ITD_XACT_OFFSET_MASK;
1468 ptr1 = (itd->bufptr[pg] & ITD_BUFPTR_MASK);
1469 ptr2 = (itd->bufptr[pg+1] & ITD_BUFPTR_MASK);
1470 len = get_field(itd->transact[i], ITD_XACT_LENGTH);
1472 if (len > max * mult) {
1476 if (len > BUFF_SIZE) {
1480 qemu_sglist_init(&ehci->isgl, 2, ehci->dma);
1481 if (off + len > 4096) {
1482 /* transfer crosses page border */
1483 uint32_t len2 = off + len - 4096;
1484 uint32_t len1 = len - len2;
1485 qemu_sglist_add(&ehci->isgl, ptr1 + off, len1);
1486 qemu_sglist_add(&ehci->isgl, ptr2, len2);
1488 qemu_sglist_add(&ehci->isgl, ptr1 + off, len);
1491 pid = dir ? USB_TOKEN_IN : USB_TOKEN_OUT;
1493 dev = ehci_find_device(ehci, devaddr);
1494 ep = usb_ep_get(dev, pid, endp);
1495 if (ep && ep->type == USB_ENDPOINT_XFER_ISOC) {
1496 usb_packet_setup(&ehci->ipacket, pid, ep, addr, false,
1497 (itd->transact[i] & ITD_XACT_IOC) != 0);
1498 usb_packet_map(&ehci->ipacket, &ehci->isgl);
1499 usb_handle_packet(dev, &ehci->ipacket);
1500 usb_packet_unmap(&ehci->ipacket, &ehci->isgl);
1502 DPRINTF("ISOCH: attempt to addess non-iso endpoint\n");
1503 ehci->ipacket.status = USB_RET_NAK;
1504 ehci->ipacket.actual_length = 0;
1506 qemu_sglist_destroy(&ehci->isgl);
1508 switch (ehci->ipacket.status) {
1509 case USB_RET_SUCCESS:
1512 fprintf(stderr, "Unexpected iso usb result: %d\n",
1513 ehci->ipacket.status);
1515 case USB_RET_IOERROR:
1517 /* 3.3.2: XACTERR is only allowed on IN transactions */
1519 itd->transact[i] |= ITD_XACT_XACTERR;
1520 ehci_raise_irq(ehci, USBSTS_ERRINT);
1523 case USB_RET_BABBLE:
1524 itd->transact[i] |= ITD_XACT_BABBLE;
1525 ehci_raise_irq(ehci, USBSTS_ERRINT);
1528 /* no data for us, so do a zero-length transfer */
1529 ehci->ipacket.actual_length = 0;
1533 set_field(&itd->transact[i], len - ehci->ipacket.actual_length,
1534 ITD_XACT_LENGTH); /* OUT */
1536 set_field(&itd->transact[i], ehci->ipacket.actual_length,
1537 ITD_XACT_LENGTH); /* IN */
1539 if (itd->transact[i] & ITD_XACT_IOC) {
1540 ehci_raise_irq(ehci, USBSTS_INT);
1542 itd->transact[i] &= ~ITD_XACT_ACTIVE;
1549 /* This state is the entry point for asynchronous schedule
1550 * processing. Entry here consitutes a EHCI start event state (4.8.5)
1552 static int ehci_state_waitlisthead(EHCIState *ehci, int async)
1557 uint32_t entry = ehci->asynclistaddr;
1559 /* set reclamation flag at start event (4.8.6) */
1561 ehci_set_usbsts(ehci, USBSTS_REC);
1564 ehci_queues_rip_unused(ehci, async);
1566 /* Find the head of the list (4.9.1.1) */
1567 for(i = 0; i < MAX_QH; i++) {
1568 if (get_dwords(ehci, NLPTR_GET(entry), (uint32_t *) &qh,
1569 sizeof(EHCIqh) >> 2) < 0) {
1572 ehci_trace_qh(NULL, NLPTR_GET(entry), &qh);
1574 if (qh.epchar & QH_EPCHAR_H) {
1576 entry |= (NLPTR_TYPE_QH << 1);
1579 ehci_set_fetch_addr(ehci, async, entry);
1580 ehci_set_state(ehci, async, EST_FETCHENTRY);
1586 if (entry == ehci->asynclistaddr) {
1591 /* no head found for list. */
1593 ehci_set_state(ehci, async, EST_ACTIVE);
1600 /* This state is the entry point for periodic schedule processing as
1601 * well as being a continuation state for async processing.
1603 static int ehci_state_fetchentry(EHCIState *ehci, int async)
1606 uint32_t entry = ehci_get_fetch_addr(ehci, async);
1608 if (NLPTR_TBIT(entry)) {
1609 ehci_set_state(ehci, async, EST_ACTIVE);
1613 /* section 4.8, only QH in async schedule */
1614 if (async && (NLPTR_TYPE_GET(entry) != NLPTR_TYPE_QH)) {
1615 fprintf(stderr, "non queue head request in async schedule\n");
1619 switch (NLPTR_TYPE_GET(entry)) {
1621 ehci_set_state(ehci, async, EST_FETCHQH);
1625 case NLPTR_TYPE_ITD:
1626 ehci_set_state(ehci, async, EST_FETCHITD);
1630 case NLPTR_TYPE_STITD:
1631 ehci_set_state(ehci, async, EST_FETCHSITD);
1636 /* TODO: handle FSTN type */
1637 fprintf(stderr, "FETCHENTRY: entry at %X is of type %d "
1638 "which is not supported yet\n", entry, NLPTR_TYPE_GET(entry));
1646 static EHCIQueue *ehci_state_fetchqh(EHCIState *ehci, int async)
1652 entry = ehci_get_fetch_addr(ehci, async);
1653 q = ehci_find_queue_by_qh(ehci, entry, async);
1655 q = ehci_alloc_queue(ehci, entry, async);
1660 /* we are going in circles -- stop processing */
1661 ehci_set_state(ehci, async, EST_ACTIVE);
1666 if (get_dwords(ehci, NLPTR_GET(q->qhaddr),
1667 (uint32_t *) &qh, sizeof(EHCIqh) >> 2) < 0) {
1671 ehci_trace_qh(q, NLPTR_GET(q->qhaddr), &qh);
1674 * The overlay area of the qh should never be changed by the guest,
1675 * except when idle, in which case the reset is a nop.
1677 if (!ehci_verify_qh(q, &qh)) {
1678 if (ehci_reset_queue(q) > 0) {
1679 ehci_trace_guest_bug(ehci, "guest updated active QH");
1684 q->transact_ctr = get_field(q->qh.epcap, QH_EPCAP_MULT);
1685 if (q->transact_ctr == 0) { /* Guest bug in some versions of windows */
1686 q->transact_ctr = 4;
1689 if (q->dev == NULL) {
1690 q->dev = ehci_find_device(q->ehci,
1691 get_field(q->qh.epchar, QH_EPCHAR_DEVADDR));
1694 if (async && (q->qh.epchar & QH_EPCHAR_H)) {
1696 /* EHCI spec version 1.0 Section 4.8.3 & 4.10.1 */
1697 if (ehci->usbsts & USBSTS_REC) {
1698 ehci_clear_usbsts(ehci, USBSTS_REC);
1700 DPRINTF("FETCHQH: QH 0x%08x. H-bit set, reclamation status reset"
1701 " - done processing\n", q->qhaddr);
1702 ehci_set_state(ehci, async, EST_ACTIVE);
1709 if (q->qhaddr != q->qh.next) {
1710 DPRINTF("FETCHQH: QH 0x%08x (h %x halt %x active %x) next 0x%08x\n",
1712 q->qh.epchar & QH_EPCHAR_H,
1713 q->qh.token & QTD_TOKEN_HALT,
1714 q->qh.token & QTD_TOKEN_ACTIVE,
1719 if (q->qh.token & QTD_TOKEN_HALT) {
1720 ehci_set_state(ehci, async, EST_HORIZONTALQH);
1722 } else if ((q->qh.token & QTD_TOKEN_ACTIVE) &&
1723 (NLPTR_TBIT(q->qh.current_qtd) == 0)) {
1724 q->qtdaddr = q->qh.current_qtd;
1725 ehci_set_state(ehci, async, EST_FETCHQTD);
1728 /* EHCI spec version 1.0 Section 4.10.2 */
1729 ehci_set_state(ehci, async, EST_ADVANCEQUEUE);
1736 static int ehci_state_fetchitd(EHCIState *ehci, int async)
1742 entry = ehci_get_fetch_addr(ehci, async);
1744 if (get_dwords(ehci, NLPTR_GET(entry), (uint32_t *) &itd,
1745 sizeof(EHCIitd) >> 2) < 0) {
1748 ehci_trace_itd(ehci, entry, &itd);
1750 if (ehci_process_itd(ehci, &itd, entry) != 0) {
1754 put_dwords(ehci, NLPTR_GET(entry), (uint32_t *) &itd,
1755 sizeof(EHCIitd) >> 2);
1756 ehci_set_fetch_addr(ehci, async, itd.next);
1757 ehci_set_state(ehci, async, EST_FETCHENTRY);
1762 static int ehci_state_fetchsitd(EHCIState *ehci, int async)
1768 entry = ehci_get_fetch_addr(ehci, async);
1770 if (get_dwords(ehci, NLPTR_GET(entry), (uint32_t *)&sitd,
1771 sizeof(EHCIsitd) >> 2) < 0) {
1774 ehci_trace_sitd(ehci, entry, &sitd);
1776 if (!(sitd.results & SITD_RESULTS_ACTIVE)) {
1777 /* siTD is not active, nothing to do */;
1779 /* TODO: split transfers are not implemented */
1780 fprintf(stderr, "WARNING: Skipping active siTD\n");
1783 ehci_set_fetch_addr(ehci, async, sitd.next);
1784 ehci_set_state(ehci, async, EST_FETCHENTRY);
1788 /* Section 4.10.2 - paragraph 3 */
1789 static int ehci_state_advqueue(EHCIQueue *q)
1792 /* TO-DO: 4.10.2 - paragraph 2
1793 * if I-bit is set to 1 and QH is not active
1794 * go to horizontal QH
1797 ehci_set_state(ehci, async, EST_HORIZONTALQH);
1803 * want data and alt-next qTD is valid
1805 if (((q->qh.token & QTD_TOKEN_TBYTES_MASK) != 0) &&
1806 (NLPTR_TBIT(q->qh.altnext_qtd) == 0)) {
1807 q->qtdaddr = q->qh.altnext_qtd;
1808 ehci_set_state(q->ehci, q->async, EST_FETCHQTD);
1813 } else if (NLPTR_TBIT(q->qh.next_qtd) == 0) {
1814 q->qtdaddr = q->qh.next_qtd;
1815 ehci_set_state(q->ehci, q->async, EST_FETCHQTD);
1818 * no valid qTD, try next QH
1821 ehci_set_state(q->ehci, q->async, EST_HORIZONTALQH);
1827 /* Section 4.10.2 - paragraph 4 */
1828 static int ehci_state_fetchqtd(EHCIQueue *q)
1834 if (get_dwords(q->ehci, NLPTR_GET(q->qtdaddr), (uint32_t *) &qtd,
1835 sizeof(EHCIqtd) >> 2) < 0) {
1838 ehci_trace_qtd(q, NLPTR_GET(q->qtdaddr), &qtd);
1840 p = QTAILQ_FIRST(&q->packets);
1842 if (!ehci_verify_qtd(p, &qtd)) {
1843 ehci_cancel_queue(q);
1844 if (qtd.token & QTD_TOKEN_ACTIVE) {
1845 ehci_trace_guest_bug(q->ehci, "guest updated active qTD");
1850 ehci_qh_do_overlay(q);
1854 if (!(qtd.token & QTD_TOKEN_ACTIVE)) {
1855 ehci_set_state(q->ehci, q->async, EST_HORIZONTALQH);
1856 } else if (p != NULL) {
1858 case EHCI_ASYNC_NONE:
1859 case EHCI_ASYNC_INITIALIZED:
1860 /* Not yet executed (MULT), or previously nacked (int) packet */
1861 ehci_set_state(q->ehci, q->async, EST_EXECUTE);
1863 case EHCI_ASYNC_INFLIGHT:
1864 /* Check if the guest has added new tds to the queue */
1865 again = ehci_fill_queue(QTAILQ_LAST(&q->packets, pkts_head));
1866 /* Unfinished async handled packet, go horizontal */
1867 ehci_set_state(q->ehci, q->async, EST_HORIZONTALQH);
1869 case EHCI_ASYNC_FINISHED:
1870 /* Complete executing of the packet */
1871 ehci_set_state(q->ehci, q->async, EST_EXECUTING);
1875 p = ehci_alloc_packet(q);
1876 p->qtdaddr = q->qtdaddr;
1878 ehci_set_state(q->ehci, q->async, EST_EXECUTE);
1884 static int ehci_state_horizqh(EHCIQueue *q)
1888 if (ehci_get_fetch_addr(q->ehci, q->async) != q->qh.next) {
1889 ehci_set_fetch_addr(q->ehci, q->async, q->qh.next);
1890 ehci_set_state(q->ehci, q->async, EST_FETCHENTRY);
1893 ehci_set_state(q->ehci, q->async, EST_ACTIVE);
1899 /* Returns "again" */
1900 static int ehci_fill_queue(EHCIPacket *p)
1902 USBEndpoint *ep = p->packet.ep;
1903 EHCIQueue *q = p->queue;
1904 EHCIqtd qtd = p->qtd;
1908 if (NLPTR_TBIT(qtd.next) != 0) {
1913 * Detect circular td lists, Windows creates these, counting on the
1914 * active bit going low after execution to make the queue stop.
1916 QTAILQ_FOREACH(p, &q->packets, next) {
1917 if (p->qtdaddr == qtdaddr) {
1921 if (get_dwords(q->ehci, NLPTR_GET(qtdaddr),
1922 (uint32_t *) &qtd, sizeof(EHCIqtd) >> 2) < 0) {
1925 ehci_trace_qtd(q, NLPTR_GET(qtdaddr), &qtd);
1926 if (!(qtd.token & QTD_TOKEN_ACTIVE)) {
1929 if (!ehci_verify_pid(q, &qtd)) {
1930 ehci_trace_guest_bug(q->ehci, "guest queued token with wrong pid");
1933 p = ehci_alloc_packet(q);
1934 p->qtdaddr = qtdaddr;
1936 if (ehci_execute(p, "queue") == -1) {
1939 assert(p->packet.status == USB_RET_ASYNC);
1940 p->async = EHCI_ASYNC_INFLIGHT;
1943 usb_device_flush_ep_queue(ep->dev, ep);
1947 static int ehci_state_execute(EHCIQueue *q)
1949 EHCIPacket *p = QTAILQ_FIRST(&q->packets);
1953 assert(p->qtdaddr == q->qtdaddr);
1955 if (ehci_qh_do_overlay(q) != 0) {
1959 // TODO verify enough time remains in the uframe as in 4.4.1.1
1960 // TODO write back ptr to async list when done or out of time
1962 /* 4.10.3, bottom of page 82, go horizontal on transaction counter == 0 */
1963 if (!q->async && q->transact_ctr == 0) {
1964 ehci_set_state(q->ehci, q->async, EST_HORIZONTALQH);
1970 ehci_set_usbsts(q->ehci, USBSTS_REC);
1973 again = ehci_execute(p, "process");
1977 if (p->packet.status == USB_RET_ASYNC) {
1979 trace_usb_ehci_packet_action(p->queue, p, "async");
1980 p->async = EHCI_ASYNC_INFLIGHT;
1981 ehci_set_state(q->ehci, q->async, EST_HORIZONTALQH);
1983 again = ehci_fill_queue(p);
1990 ehci_set_state(q->ehci, q->async, EST_EXECUTING);
1997 static int ehci_state_executing(EHCIQueue *q)
1999 EHCIPacket *p = QTAILQ_FIRST(&q->packets);
2002 assert(p->qtdaddr == q->qtdaddr);
2004 ehci_execute_complete(q);
2007 if (!q->async && q->transact_ctr > 0) {
2012 if (p->packet.status == USB_RET_NAK) {
2013 ehci_set_state(q->ehci, q->async, EST_HORIZONTALQH);
2015 ehci_set_state(q->ehci, q->async, EST_WRITEBACK);
2023 static int ehci_state_writeback(EHCIQueue *q)
2025 EHCIPacket *p = QTAILQ_FIRST(&q->packets);
2026 uint32_t *qtd, addr;
2029 /* Write back the QTD from the QH area */
2031 assert(p->qtdaddr == q->qtdaddr);
2033 ehci_trace_qtd(q, NLPTR_GET(p->qtdaddr), (EHCIqtd *) &q->qh.next_qtd);
2034 qtd = (uint32_t *) &q->qh.next_qtd;
2035 addr = NLPTR_GET(p->qtdaddr);
2036 put_dwords(q->ehci, addr + 2 * sizeof(uint32_t), qtd + 2, 2);
2037 ehci_free_packet(p);
2040 * EHCI specs say go horizontal here.
2042 * We can also advance the queue here for performance reasons. We
2043 * need to take care to only take that shortcut in case we've
2044 * processed the qtd just written back without errors, i.e. halt
2047 if (q->qh.token & QTD_TOKEN_HALT) {
2048 ehci_set_state(q->ehci, q->async, EST_HORIZONTALQH);
2051 ehci_set_state(q->ehci, q->async, EST_ADVANCEQUEUE);
2058 * This is the state machine that is common to both async and periodic
2061 static void ehci_advance_state(EHCIState *ehci, int async)
2063 EHCIQueue *q = NULL;
2067 switch(ehci_get_state(ehci, async)) {
2068 case EST_WAITLISTHEAD:
2069 again = ehci_state_waitlisthead(ehci, async);
2072 case EST_FETCHENTRY:
2073 again = ehci_state_fetchentry(ehci, async);
2077 q = ehci_state_fetchqh(ehci, async);
2079 assert(q->async == async);
2087 again = ehci_state_fetchitd(ehci, async);
2091 again = ehci_state_fetchsitd(ehci, async);
2094 case EST_ADVANCEQUEUE:
2095 again = ehci_state_advqueue(q);
2099 again = ehci_state_fetchqtd(q);
2102 case EST_HORIZONTALQH:
2103 again = ehci_state_horizqh(q);
2107 again = ehci_state_execute(q);
2109 ehci->async_stepdown = 0;
2116 ehci->async_stepdown = 0;
2118 again = ehci_state_executing(q);
2123 again = ehci_state_writeback(q);
2125 ehci->periodic_sched_active = PERIODIC_ACTIVE;
2130 fprintf(stderr, "Bad state!\n");
2137 fprintf(stderr, "processing error - resetting ehci HC\n");
2145 static void ehci_advance_async_state(EHCIState *ehci)
2147 const int async = 1;
2149 switch(ehci_get_state(ehci, async)) {
2151 if (!ehci_async_enabled(ehci)) {
2154 ehci_set_state(ehci, async, EST_ACTIVE);
2155 // No break, fall through to ACTIVE
2158 if (!ehci_async_enabled(ehci)) {
2159 ehci_queues_rip_all(ehci, async);
2160 ehci_set_state(ehci, async, EST_INACTIVE);
2164 /* make sure guest has acknowledged the doorbell interrupt */
2165 /* TO-DO: is this really needed? */
2166 if (ehci->usbsts & USBSTS_IAA) {
2167 DPRINTF("IAA status bit still set.\n");
2171 /* check that address register has been set */
2172 if (ehci->asynclistaddr == 0) {
2176 ehci_set_state(ehci, async, EST_WAITLISTHEAD);
2177 ehci_advance_state(ehci, async);
2179 /* If the doorbell is set, the guest wants to make a change to the
2180 * schedule. The host controller needs to release cached data.
2183 if (ehci->usbcmd & USBCMD_IAAD) {
2184 /* Remove all unseen qhs from the async qhs queue */
2185 ehci_queues_rip_unseen(ehci, async);
2186 trace_usb_ehci_doorbell_ack();
2187 ehci->usbcmd &= ~USBCMD_IAAD;
2188 ehci_raise_irq(ehci, USBSTS_IAA);
2193 /* this should only be due to a developer mistake */
2194 fprintf(stderr, "ehci: Bad asynchronous state %d. "
2195 "Resetting to active\n", ehci->astate);
2200 static void ehci_advance_periodic_state(EHCIState *ehci)
2204 const int async = 0;
2208 switch(ehci_get_state(ehci, async)) {
2210 if (!(ehci->frindex & 7) && ehci_periodic_enabled(ehci)) {
2211 ehci_set_state(ehci, async, EST_ACTIVE);
2212 // No break, fall through to ACTIVE
2217 if (!(ehci->frindex & 7) && !ehci_periodic_enabled(ehci)) {
2218 ehci_queues_rip_all(ehci, async);
2219 ehci_set_state(ehci, async, EST_INACTIVE);
2223 list = ehci->periodiclistbase & 0xfffff000;
2224 /* check that register has been set */
2228 list |= ((ehci->frindex & 0x1ff8) >> 1);
2230 if (get_dwords(ehci, list, &entry, 1) < 0) {
2234 DPRINTF("PERIODIC state adv fr=%d. [%08X] -> %08X\n",
2235 ehci->frindex / 8, list, entry);
2236 ehci_set_fetch_addr(ehci, async,entry);
2237 ehci_set_state(ehci, async, EST_FETCHENTRY);
2238 ehci_advance_state(ehci, async);
2239 ehci_queues_rip_unused(ehci, async);
2243 /* this should only be due to a developer mistake */
2244 fprintf(stderr, "ehci: Bad periodic state %d. "
2245 "Resetting to active\n", ehci->pstate);
2250 static void ehci_update_frindex(EHCIState *ehci, int uframes)
2254 if (!ehci_enabled(ehci) && ehci->pstate == EST_INACTIVE) {
2258 for (i = 0; i < uframes; i++) {
2261 if (ehci->frindex == 0x00002000) {
2262 ehci_raise_irq(ehci, USBSTS_FLR);
2265 if (ehci->frindex == 0x00004000) {
2266 ehci_raise_irq(ehci, USBSTS_FLR);
2268 if (ehci->usbsts_frindex >= 0x00004000) {
2269 ehci->usbsts_frindex -= 0x00004000;
2271 ehci->usbsts_frindex = 0;
2277 static void ehci_frame_timer(void *opaque)
2279 EHCIState *ehci = opaque;
2281 int64_t expire_time, t_now;
2282 uint64_t ns_elapsed;
2283 int uframes, skipped_uframes;
2286 t_now = qemu_get_clock_ns(vm_clock);
2287 ns_elapsed = t_now - ehci->last_run_ns;
2288 uframes = ns_elapsed / UFRAME_TIMER_NS;
2290 if (ehci_periodic_enabled(ehci) || ehci->pstate != EST_INACTIVE) {
2293 if (uframes > (ehci->maxframes * 8)) {
2294 skipped_uframes = uframes - (ehci->maxframes * 8);
2295 ehci_update_frindex(ehci, skipped_uframes);
2296 ehci->last_run_ns += UFRAME_TIMER_NS * skipped_uframes;
2297 uframes -= skipped_uframes;
2298 DPRINTF("WARNING - EHCI skipped %d uframes\n", skipped_uframes);
2301 for (i = 0; i < uframes; i++) {
2303 * If we're running behind schedule, we should not catch up
2304 * too fast, as that will make some guests unhappy:
2305 * 1) We must process a minimum of MIN_UFR_PER_TICK frames,
2306 * otherwise we will never catch up
2307 * 2) Process frames until the guest has requested an irq (IOC)
2309 if (i >= MIN_UFR_PER_TICK) {
2310 ehci_commit_irq(ehci);
2311 if ((ehci->usbsts & USBINTR_MASK) & ehci->usbintr) {
2315 if (ehci->periodic_sched_active) {
2316 ehci->periodic_sched_active--;
2318 ehci_update_frindex(ehci, 1);
2319 if ((ehci->frindex & 7) == 0) {
2320 ehci_advance_periodic_state(ehci);
2322 ehci->last_run_ns += UFRAME_TIMER_NS;
2325 ehci->periodic_sched_active = 0;
2326 ehci_update_frindex(ehci, uframes);
2327 ehci->last_run_ns += UFRAME_TIMER_NS * uframes;
2330 if (ehci->periodic_sched_active) {
2331 ehci->async_stepdown = 0;
2332 } else if (ehci->async_stepdown < ehci->maxframes / 2) {
2333 ehci->async_stepdown++;
2336 /* Async is not inside loop since it executes everything it can once
2339 if (ehci_async_enabled(ehci) || ehci->astate != EST_INACTIVE) {
2341 ehci_advance_async_state(ehci);
2344 ehci_commit_irq(ehci);
2345 if (ehci->usbsts_pending) {
2347 ehci->async_stepdown = 0;
2350 if (ehci_enabled(ehci) && (ehci->usbintr & USBSTS_FLR)) {
2355 /* If we've raised int, we speed up the timer, so that we quickly
2356 * notice any new packets queued up in response */
2357 if (ehci->int_req_by_async && (ehci->usbsts & USBSTS_INT)) {
2358 expire_time = t_now + get_ticks_per_sec() / (FRAME_TIMER_FREQ * 4);
2359 ehci->int_req_by_async = false;
2361 expire_time = t_now + (get_ticks_per_sec()
2362 * (ehci->async_stepdown+1) / FRAME_TIMER_FREQ);
2364 qemu_mod_timer(ehci->frame_timer, expire_time);
2368 static const MemoryRegionOps ehci_mmio_caps_ops = {
2369 .read = ehci_caps_read,
2370 .valid.min_access_size = 1,
2371 .valid.max_access_size = 4,
2372 .impl.min_access_size = 1,
2373 .impl.max_access_size = 1,
2374 .endianness = DEVICE_LITTLE_ENDIAN,
2377 static const MemoryRegionOps ehci_mmio_opreg_ops = {
2378 .read = ehci_opreg_read,
2379 .write = ehci_opreg_write,
2380 .valid.min_access_size = 4,
2381 .valid.max_access_size = 4,
2382 .endianness = DEVICE_LITTLE_ENDIAN,
2385 static const MemoryRegionOps ehci_mmio_port_ops = {
2386 .read = ehci_port_read,
2387 .write = ehci_port_write,
2388 .valid.min_access_size = 4,
2389 .valid.max_access_size = 4,
2390 .endianness = DEVICE_LITTLE_ENDIAN,
2393 static USBPortOps ehci_port_ops = {
2394 .attach = ehci_attach,
2395 .detach = ehci_detach,
2396 .child_detach = ehci_child_detach,
2397 .wakeup = ehci_wakeup,
2398 .complete = ehci_async_complete_packet,
2401 static USBBusOps ehci_bus_ops = {
2402 .register_companion = ehci_register_companion,
2403 .wakeup_endpoint = ehci_wakeup_endpoint,
2406 static void usb_ehci_pre_save(void *opaque)
2408 EHCIState *ehci = opaque;
2409 uint32_t new_frindex;
2411 /* Round down frindex to a multiple of 8 for migration compatibility */
2412 new_frindex = ehci->frindex & ~7;
2413 ehci->last_run_ns -= (ehci->frindex - new_frindex) * UFRAME_TIMER_NS;
2414 ehci->frindex = new_frindex;
2417 static int usb_ehci_post_load(void *opaque, int version_id)
2419 EHCIState *s = opaque;
2422 for (i = 0; i < NB_PORTS; i++) {
2423 USBPort *companion = s->companion_ports[i];
2424 if (companion == NULL) {
2427 if (s->portsc[i] & PORTSC_POWNER) {
2428 companion->dev = s->ports[i].dev;
2430 companion->dev = NULL;
2437 static void usb_ehci_vm_state_change(void *opaque, int running, RunState state)
2439 EHCIState *ehci = opaque;
2442 * We don't migrate the EHCIQueue-s, instead we rebuild them for the
2443 * schedule in guest memory. We must do the rebuilt ASAP, so that
2444 * USB-devices which have async handled packages have a packet in the
2445 * ep queue to match the completion with.
2447 if (state == RUN_STATE_RUNNING) {
2448 ehci_advance_async_state(ehci);
2452 * The schedule rebuilt from guest memory could cause the migration dest
2453 * to miss a QH unlink, and fail to cancel packets, since the unlinked QH
2454 * will never have existed on the destination. Therefor we must flush the
2455 * async schedule on savevm to catch any not yet noticed unlinks.
2457 if (state == RUN_STATE_SAVE_VM) {
2458 ehci_advance_async_state(ehci);
2459 ehci_queues_rip_unseen(ehci, 1);
2463 const VMStateDescription vmstate_ehci = {
2464 .name = "ehci-core",
2466 .minimum_version_id = 1,
2467 .pre_save = usb_ehci_pre_save,
2468 .post_load = usb_ehci_post_load,
2469 .fields = (VMStateField[]) {
2470 /* mmio registers */
2471 VMSTATE_UINT32(usbcmd, EHCIState),
2472 VMSTATE_UINT32(usbsts, EHCIState),
2473 VMSTATE_UINT32_V(usbsts_pending, EHCIState, 2),
2474 VMSTATE_UINT32_V(usbsts_frindex, EHCIState, 2),
2475 VMSTATE_UINT32(usbintr, EHCIState),
2476 VMSTATE_UINT32(frindex, EHCIState),
2477 VMSTATE_UINT32(ctrldssegment, EHCIState),
2478 VMSTATE_UINT32(periodiclistbase, EHCIState),
2479 VMSTATE_UINT32(asynclistaddr, EHCIState),
2480 VMSTATE_UINT32(configflag, EHCIState),
2481 VMSTATE_UINT32(portsc[0], EHCIState),
2482 VMSTATE_UINT32(portsc[1], EHCIState),
2483 VMSTATE_UINT32(portsc[2], EHCIState),
2484 VMSTATE_UINT32(portsc[3], EHCIState),
2485 VMSTATE_UINT32(portsc[4], EHCIState),
2486 VMSTATE_UINT32(portsc[5], EHCIState),
2488 VMSTATE_TIMER(frame_timer, EHCIState),
2489 VMSTATE_UINT64(last_run_ns, EHCIState),
2490 VMSTATE_UINT32(async_stepdown, EHCIState),
2491 /* schedule state */
2492 VMSTATE_UINT32(astate, EHCIState),
2493 VMSTATE_UINT32(pstate, EHCIState),
2494 VMSTATE_UINT32(a_fetch_addr, EHCIState),
2495 VMSTATE_UINT32(p_fetch_addr, EHCIState),
2496 VMSTATE_END_OF_LIST()
2500 void usb_ehci_initfn(EHCIState *s, DeviceState *dev)
2504 /* 2.2 host controller interface version */
2505 s->caps[0x00] = (uint8_t)(s->opregbase - s->capsbase);
2506 s->caps[0x01] = 0x00;
2507 s->caps[0x02] = 0x00;
2508 s->caps[0x03] = 0x01; /* HC version */
2509 s->caps[0x04] = NB_PORTS; /* Number of downstream ports */
2510 s->caps[0x05] = 0x00; /* No companion ports at present */
2511 s->caps[0x06] = 0x00;
2512 s->caps[0x07] = 0x00;
2513 s->caps[0x08] = 0x80; /* We can cache whole frame, no 64-bit */
2514 s->caps[0x0a] = 0x00;
2515 s->caps[0x0b] = 0x00;
2517 usb_bus_new(&s->bus, &ehci_bus_ops, dev);
2518 for(i = 0; i < NB_PORTS; i++) {
2519 usb_register_port(&s->bus, &s->ports[i], s, i, &ehci_port_ops,
2520 USB_SPEED_MASK_HIGH);
2521 s->ports[i].dev = 0;
2524 s->frame_timer = qemu_new_timer_ns(vm_clock, ehci_frame_timer, s);
2525 s->async_bh = qemu_bh_new(ehci_frame_timer, s);
2526 QTAILQ_INIT(&s->aqueues);
2527 QTAILQ_INIT(&s->pqueues);
2528 usb_packet_init(&s->ipacket);
2530 qemu_register_reset(ehci_reset, s);
2531 qemu_add_vm_change_state_handler(usb_ehci_vm_state_change, s);
2533 memory_region_init(&s->mem, "ehci", MMIO_SIZE);
2534 memory_region_init_io(&s->mem_caps, &ehci_mmio_caps_ops, s,
2535 "capabilities", CAPA_SIZE);
2536 memory_region_init_io(&s->mem_opreg, &ehci_mmio_opreg_ops, s,
2537 "operational", PORTSC_BEGIN);
2538 memory_region_init_io(&s->mem_ports, &ehci_mmio_port_ops, s,
2539 "ports", PORTSC_END - PORTSC_BEGIN);
2541 memory_region_add_subregion(&s->mem, s->capsbase, &s->mem_caps);
2542 memory_region_add_subregion(&s->mem, s->opregbase, &s->mem_opreg);
2543 memory_region_add_subregion(&s->mem, s->opregbase + PORTSC_BEGIN,
2548 * vim: expandtab ts=4