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authorRajithaY <rajithax.yerrumsetty@intel.com>2017-04-25 03:31:15 -0700
committerRajitha Yerrumchetty <rajithax.yerrumsetty@intel.com>2017-05-22 06:48:08 +0000
commitbb756eebdac6fd24e8919e2c43f7d2c8c4091f59 (patch)
treeca11e03542edf2d8f631efeca5e1626d211107e3 /qemu/hw/usb/hcd-ehci.c
parenta14b48d18a9ed03ec191cf16b162206998a895ce (diff)
Adding qemu as a submodule of KVMFORNFV
This Patch includes the changes to add qemu as a submodule to kvmfornfv repo and make use of the updated latest qemu for the execution of all testcase Change-Id: I1280af507a857675c7f81d30c95255635667bdd7 Signed-off-by:RajithaY<rajithax.yerrumsetty@intel.com>
Diffstat (limited to 'qemu/hw/usb/hcd-ehci.c')
-rw-r--r--qemu/hw/usb/hcd-ehci.c2549
1 files changed, 0 insertions, 2549 deletions
diff --git a/qemu/hw/usb/hcd-ehci.c b/qemu/hw/usb/hcd-ehci.c
deleted file mode 100644
index 43a8f7abc..000000000
--- a/qemu/hw/usb/hcd-ehci.c
+++ /dev/null
@@ -1,2549 +0,0 @@
-/*
- * QEMU USB EHCI Emulation
- *
- * Copyright(c) 2008 Emutex Ltd. (address@hidden)
- * Copyright(c) 2011-2012 Red Hat, Inc.
- *
- * Red Hat Authors:
- * Gerd Hoffmann <kraxel@redhat.com>
- * Hans de Goede <hdegoede@redhat.com>
- *
- * EHCI project was started by Mark Burkley, with contributions by
- * Niels de Vos. David S. Ahern continued working on it. Kevin Wolf,
- * Jan Kiszka and Vincent Palatin contributed bugfixes.
- *
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or(at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "qemu/osdep.h"
-#include "qapi/error.h"
-#include "hw/usb/ehci-regs.h"
-#include "hw/usb/hcd-ehci.h"
-#include "trace.h"
-
-#define FRAME_TIMER_FREQ 1000
-#define FRAME_TIMER_NS (NANOSECONDS_PER_SECOND / FRAME_TIMER_FREQ)
-#define UFRAME_TIMER_NS (FRAME_TIMER_NS / 8)
-
-#define NB_MAXINTRATE 8 // Max rate at which controller issues ints
-#define BUFF_SIZE 5*4096 // Max bytes to transfer per transaction
-#define MAX_QH 100 // Max allowable queue heads in a chain
-#define MIN_UFR_PER_TICK 24 /* Min frames to process when catching up */
-#define PERIODIC_ACTIVE 512 /* Micro-frames */
-
-/* Internal periodic / asynchronous schedule state machine states
- */
-typedef enum {
- EST_INACTIVE = 1000,
- EST_ACTIVE,
- EST_EXECUTING,
- EST_SLEEPING,
- /* The following states are internal to the state machine function
- */
- EST_WAITLISTHEAD,
- EST_FETCHENTRY,
- EST_FETCHQH,
- EST_FETCHITD,
- EST_FETCHSITD,
- EST_ADVANCEQUEUE,
- EST_FETCHQTD,
- EST_EXECUTE,
- EST_WRITEBACK,
- EST_HORIZONTALQH
-} EHCI_STATES;
-
-/* macros for accessing fields within next link pointer entry */
-#define NLPTR_GET(x) ((x) & 0xffffffe0)
-#define NLPTR_TYPE_GET(x) (((x) >> 1) & 3)
-#define NLPTR_TBIT(x) ((x) & 1) // 1=invalid, 0=valid
-
-/* link pointer types */
-#define NLPTR_TYPE_ITD 0 // isoc xfer descriptor
-#define NLPTR_TYPE_QH 1 // queue head
-#define NLPTR_TYPE_STITD 2 // split xaction, isoc xfer descriptor
-#define NLPTR_TYPE_FSTN 3 // frame span traversal node
-
-#define SET_LAST_RUN_CLOCK(s) \
- (s)->last_run_ns = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
-
-/* nifty macros from Arnon's EHCI version */
-#define get_field(data, field) \
- (((data) & field##_MASK) >> field##_SH)
-
-#define set_field(data, newval, field) do { \
- uint32_t val = *data; \
- val &= ~ field##_MASK; \
- val |= ((newval) << field##_SH) & field##_MASK; \
- *data = val; \
- } while(0)
-
-static const char *ehci_state_names[] = {
- [EST_INACTIVE] = "INACTIVE",
- [EST_ACTIVE] = "ACTIVE",
- [EST_EXECUTING] = "EXECUTING",
- [EST_SLEEPING] = "SLEEPING",
- [EST_WAITLISTHEAD] = "WAITLISTHEAD",
- [EST_FETCHENTRY] = "FETCH ENTRY",
- [EST_FETCHQH] = "FETCH QH",
- [EST_FETCHITD] = "FETCH ITD",
- [EST_ADVANCEQUEUE] = "ADVANCEQUEUE",
- [EST_FETCHQTD] = "FETCH QTD",
- [EST_EXECUTE] = "EXECUTE",
- [EST_WRITEBACK] = "WRITEBACK",
- [EST_HORIZONTALQH] = "HORIZONTALQH",
-};
-
-static const char *ehci_mmio_names[] = {
- [USBCMD] = "USBCMD",
- [USBSTS] = "USBSTS",
- [USBINTR] = "USBINTR",
- [FRINDEX] = "FRINDEX",
- [PERIODICLISTBASE] = "P-LIST BASE",
- [ASYNCLISTADDR] = "A-LIST ADDR",
- [CONFIGFLAG] = "CONFIGFLAG",
-};
-
-static int ehci_state_executing(EHCIQueue *q);
-static int ehci_state_writeback(EHCIQueue *q);
-static int ehci_state_advqueue(EHCIQueue *q);
-static int ehci_fill_queue(EHCIPacket *p);
-static void ehci_free_packet(EHCIPacket *p);
-
-static const char *nr2str(const char **n, size_t len, uint32_t nr)
-{
- if (nr < len && n[nr] != NULL) {
- return n[nr];
- } else {
- return "unknown";
- }
-}
-
-static const char *state2str(uint32_t state)
-{
- return nr2str(ehci_state_names, ARRAY_SIZE(ehci_state_names), state);
-}
-
-static const char *addr2str(hwaddr addr)
-{
- return nr2str(ehci_mmio_names, ARRAY_SIZE(ehci_mmio_names), addr);
-}
-
-static void ehci_trace_usbsts(uint32_t mask, int state)
-{
- /* interrupts */
- if (mask & USBSTS_INT) {
- trace_usb_ehci_usbsts("INT", state);
- }
- if (mask & USBSTS_ERRINT) {
- trace_usb_ehci_usbsts("ERRINT", state);
- }
- if (mask & USBSTS_PCD) {
- trace_usb_ehci_usbsts("PCD", state);
- }
- if (mask & USBSTS_FLR) {
- trace_usb_ehci_usbsts("FLR", state);
- }
- if (mask & USBSTS_HSE) {
- trace_usb_ehci_usbsts("HSE", state);
- }
- if (mask & USBSTS_IAA) {
- trace_usb_ehci_usbsts("IAA", state);
- }
-
- /* status */
- if (mask & USBSTS_HALT) {
- trace_usb_ehci_usbsts("HALT", state);
- }
- if (mask & USBSTS_REC) {
- trace_usb_ehci_usbsts("REC", state);
- }
- if (mask & USBSTS_PSS) {
- trace_usb_ehci_usbsts("PSS", state);
- }
- if (mask & USBSTS_ASS) {
- trace_usb_ehci_usbsts("ASS", state);
- }
-}
-
-static inline void ehci_set_usbsts(EHCIState *s, int mask)
-{
- if ((s->usbsts & mask) == mask) {
- return;
- }
- ehci_trace_usbsts(mask, 1);
- s->usbsts |= mask;
-}
-
-static inline void ehci_clear_usbsts(EHCIState *s, int mask)
-{
- if ((s->usbsts & mask) == 0) {
- return;
- }
- ehci_trace_usbsts(mask, 0);
- s->usbsts &= ~mask;
-}
-
-/* update irq line */
-static inline void ehci_update_irq(EHCIState *s)
-{
- int level = 0;
-
- if ((s->usbsts & USBINTR_MASK) & s->usbintr) {
- level = 1;
- }
-
- trace_usb_ehci_irq(level, s->frindex, s->usbsts, s->usbintr);
- qemu_set_irq(s->irq, level);
-}
-
-/* flag interrupt condition */
-static inline void ehci_raise_irq(EHCIState *s, int intr)
-{
- if (intr & (USBSTS_PCD | USBSTS_FLR | USBSTS_HSE)) {
- s->usbsts |= intr;
- ehci_update_irq(s);
- } else {
- s->usbsts_pending |= intr;
- }
-}
-
-/*
- * Commit pending interrupts (added via ehci_raise_irq),
- * at the rate allowed by "Interrupt Threshold Control".
- */
-static inline void ehci_commit_irq(EHCIState *s)
-{
- uint32_t itc;
-
- if (!s->usbsts_pending) {
- return;
- }
- if (s->usbsts_frindex > s->frindex) {
- return;
- }
-
- itc = (s->usbcmd >> 16) & 0xff;
- s->usbsts |= s->usbsts_pending;
- s->usbsts_pending = 0;
- s->usbsts_frindex = s->frindex + itc;
- ehci_update_irq(s);
-}
-
-static void ehci_update_halt(EHCIState *s)
-{
- if (s->usbcmd & USBCMD_RUNSTOP) {
- ehci_clear_usbsts(s, USBSTS_HALT);
- } else {
- if (s->astate == EST_INACTIVE && s->pstate == EST_INACTIVE) {
- ehci_set_usbsts(s, USBSTS_HALT);
- }
- }
-}
-
-static void ehci_set_state(EHCIState *s, int async, int state)
-{
- if (async) {
- trace_usb_ehci_state("async", state2str(state));
- s->astate = state;
- if (s->astate == EST_INACTIVE) {
- ehci_clear_usbsts(s, USBSTS_ASS);
- ehci_update_halt(s);
- } else {
- ehci_set_usbsts(s, USBSTS_ASS);
- }
- } else {
- trace_usb_ehci_state("periodic", state2str(state));
- s->pstate = state;
- if (s->pstate == EST_INACTIVE) {
- ehci_clear_usbsts(s, USBSTS_PSS);
- ehci_update_halt(s);
- } else {
- ehci_set_usbsts(s, USBSTS_PSS);
- }
- }
-}
-
-static int ehci_get_state(EHCIState *s, int async)
-{
- return async ? s->astate : s->pstate;
-}
-
-static void ehci_set_fetch_addr(EHCIState *s, int async, uint32_t addr)
-{
- if (async) {
- s->a_fetch_addr = addr;
- } else {
- s->p_fetch_addr = addr;
- }
-}
-
-static int ehci_get_fetch_addr(EHCIState *s, int async)
-{
- return async ? s->a_fetch_addr : s->p_fetch_addr;
-}
-
-static void ehci_trace_qh(EHCIQueue *q, hwaddr addr, EHCIqh *qh)
-{
- /* need three here due to argument count limits */
- trace_usb_ehci_qh_ptrs(q, addr, qh->next,
- qh->current_qtd, qh->next_qtd, qh->altnext_qtd);
- trace_usb_ehci_qh_fields(addr,
- get_field(qh->epchar, QH_EPCHAR_RL),
- get_field(qh->epchar, QH_EPCHAR_MPLEN),
- get_field(qh->epchar, QH_EPCHAR_EPS),
- get_field(qh->epchar, QH_EPCHAR_EP),
- get_field(qh->epchar, QH_EPCHAR_DEVADDR));
- trace_usb_ehci_qh_bits(addr,
- (bool)(qh->epchar & QH_EPCHAR_C),
- (bool)(qh->epchar & QH_EPCHAR_H),
- (bool)(qh->epchar & QH_EPCHAR_DTC),
- (bool)(qh->epchar & QH_EPCHAR_I));
-}
-
-static void ehci_trace_qtd(EHCIQueue *q, hwaddr addr, EHCIqtd *qtd)
-{
- /* need three here due to argument count limits */
- trace_usb_ehci_qtd_ptrs(q, addr, qtd->next, qtd->altnext);
- trace_usb_ehci_qtd_fields(addr,
- get_field(qtd->token, QTD_TOKEN_TBYTES),
- get_field(qtd->token, QTD_TOKEN_CPAGE),
- get_field(qtd->token, QTD_TOKEN_CERR),
- get_field(qtd->token, QTD_TOKEN_PID));
- trace_usb_ehci_qtd_bits(addr,
- (bool)(qtd->token & QTD_TOKEN_IOC),
- (bool)(qtd->token & QTD_TOKEN_ACTIVE),
- (bool)(qtd->token & QTD_TOKEN_HALT),
- (bool)(qtd->token & QTD_TOKEN_BABBLE),
- (bool)(qtd->token & QTD_TOKEN_XACTERR));
-}
-
-static void ehci_trace_itd(EHCIState *s, hwaddr addr, EHCIitd *itd)
-{
- trace_usb_ehci_itd(addr, itd->next,
- get_field(itd->bufptr[1], ITD_BUFPTR_MAXPKT),
- get_field(itd->bufptr[2], ITD_BUFPTR_MULT),
- get_field(itd->bufptr[0], ITD_BUFPTR_EP),
- get_field(itd->bufptr[0], ITD_BUFPTR_DEVADDR));
-}
-
-static void ehci_trace_sitd(EHCIState *s, hwaddr addr,
- EHCIsitd *sitd)
-{
- trace_usb_ehci_sitd(addr, sitd->next,
- (bool)(sitd->results & SITD_RESULTS_ACTIVE));
-}
-
-static void ehci_trace_guest_bug(EHCIState *s, const char *message)
-{
- trace_usb_ehci_guest_bug(message);
- fprintf(stderr, "ehci warning: %s\n", message);
-}
-
-static inline bool ehci_enabled(EHCIState *s)
-{
- return s->usbcmd & USBCMD_RUNSTOP;
-}
-
-static inline bool ehci_async_enabled(EHCIState *s)
-{
- return ehci_enabled(s) && (s->usbcmd & USBCMD_ASE);
-}
-
-static inline bool ehci_periodic_enabled(EHCIState *s)
-{
- return ehci_enabled(s) && (s->usbcmd & USBCMD_PSE);
-}
-
-/* Get an array of dwords from main memory */
-static inline int get_dwords(EHCIState *ehci, uint32_t addr,
- uint32_t *buf, int num)
-{
- int i;
-
- if (!ehci->as) {
- ehci_raise_irq(ehci, USBSTS_HSE);
- ehci->usbcmd &= ~USBCMD_RUNSTOP;
- trace_usb_ehci_dma_error();
- return -1;
- }
-
- for (i = 0; i < num; i++, buf++, addr += sizeof(*buf)) {
- dma_memory_read(ehci->as, addr, buf, sizeof(*buf));
- *buf = le32_to_cpu(*buf);
- }
-
- return num;
-}
-
-/* Put an array of dwords in to main memory */
-static inline int put_dwords(EHCIState *ehci, uint32_t addr,
- uint32_t *buf, int num)
-{
- int i;
-
- if (!ehci->as) {
- ehci_raise_irq(ehci, USBSTS_HSE);
- ehci->usbcmd &= ~USBCMD_RUNSTOP;
- trace_usb_ehci_dma_error();
- return -1;
- }
-
- for (i = 0; i < num; i++, buf++, addr += sizeof(*buf)) {
- uint32_t tmp = cpu_to_le32(*buf);
- dma_memory_write(ehci->as, addr, &tmp, sizeof(tmp));
- }
-
- return num;
-}
-
-static int ehci_get_pid(EHCIqtd *qtd)
-{
- switch (get_field(qtd->token, QTD_TOKEN_PID)) {
- case 0:
- return USB_TOKEN_OUT;
- case 1:
- return USB_TOKEN_IN;
- case 2:
- return USB_TOKEN_SETUP;
- default:
- fprintf(stderr, "bad token\n");
- return 0;
- }
-}
-
-static bool ehci_verify_qh(EHCIQueue *q, EHCIqh *qh)
-{
- uint32_t devaddr = get_field(qh->epchar, QH_EPCHAR_DEVADDR);
- uint32_t endp = get_field(qh->epchar, QH_EPCHAR_EP);
- if ((devaddr != get_field(q->qh.epchar, QH_EPCHAR_DEVADDR)) ||
- (endp != get_field(q->qh.epchar, QH_EPCHAR_EP)) ||
- (qh->current_qtd != q->qh.current_qtd) ||
- (q->async && qh->next_qtd != q->qh.next_qtd) ||
- (memcmp(&qh->altnext_qtd, &q->qh.altnext_qtd,
- 7 * sizeof(uint32_t)) != 0) ||
- (q->dev != NULL && q->dev->addr != devaddr)) {
- return false;
- } else {
- return true;
- }
-}
-
-static bool ehci_verify_qtd(EHCIPacket *p, EHCIqtd *qtd)
-{
- if (p->qtdaddr != p->queue->qtdaddr ||
- (p->queue->async && !NLPTR_TBIT(p->qtd.next) &&
- (p->qtd.next != qtd->next)) ||
- (!NLPTR_TBIT(p->qtd.altnext) && (p->qtd.altnext != qtd->altnext)) ||
- p->qtd.token != qtd->token ||
- p->qtd.bufptr[0] != qtd->bufptr[0]) {
- return false;
- } else {
- return true;
- }
-}
-
-static bool ehci_verify_pid(EHCIQueue *q, EHCIqtd *qtd)
-{
- int ep = get_field(q->qh.epchar, QH_EPCHAR_EP);
- int pid = ehci_get_pid(qtd);
-
- /* Note the pid changing is normal for ep 0 (the control ep) */
- if (q->last_pid && ep != 0 && pid != q->last_pid) {
- return false;
- } else {
- return true;
- }
-}
-
-/* Finish executing and writeback a packet outside of the regular
- fetchqh -> fetchqtd -> execute -> writeback cycle */
-static void ehci_writeback_async_complete_packet(EHCIPacket *p)
-{
- EHCIQueue *q = p->queue;
- EHCIqtd qtd;
- EHCIqh qh;
- int state;
-
- /* Verify the qh + qtd, like we do when going through fetchqh & fetchqtd */
- get_dwords(q->ehci, NLPTR_GET(q->qhaddr),
- (uint32_t *) &qh, sizeof(EHCIqh) >> 2);
- get_dwords(q->ehci, NLPTR_GET(q->qtdaddr),
- (uint32_t *) &qtd, sizeof(EHCIqtd) >> 2);
- if (!ehci_verify_qh(q, &qh) || !ehci_verify_qtd(p, &qtd)) {
- p->async = EHCI_ASYNC_INITIALIZED;
- ehci_free_packet(p);
- return;
- }
-
- state = ehci_get_state(q->ehci, q->async);
- ehci_state_executing(q);
- ehci_state_writeback(q); /* Frees the packet! */
- if (!(q->qh.token & QTD_TOKEN_HALT)) {
- ehci_state_advqueue(q);
- }
- ehci_set_state(q->ehci, q->async, state);
-}
-
-/* packet management */
-
-static EHCIPacket *ehci_alloc_packet(EHCIQueue *q)
-{
- EHCIPacket *p;
-
- p = g_new0(EHCIPacket, 1);
- p->queue = q;
- usb_packet_init(&p->packet);
- QTAILQ_INSERT_TAIL(&q->packets, p, next);
- trace_usb_ehci_packet_action(p->queue, p, "alloc");
- return p;
-}
-
-static void ehci_free_packet(EHCIPacket *p)
-{
- if (p->async == EHCI_ASYNC_FINISHED &&
- !(p->queue->qh.token & QTD_TOKEN_HALT)) {
- ehci_writeback_async_complete_packet(p);
- return;
- }
- trace_usb_ehci_packet_action(p->queue, p, "free");
- if (p->async == EHCI_ASYNC_INFLIGHT) {
- usb_cancel_packet(&p->packet);
- }
- if (p->async == EHCI_ASYNC_FINISHED &&
- p->packet.status == USB_RET_SUCCESS) {
- fprintf(stderr,
- "EHCI: Dropping completed packet from halted %s ep %02X\n",
- (p->pid == USB_TOKEN_IN) ? "in" : "out",
- get_field(p->queue->qh.epchar, QH_EPCHAR_EP));
- }
- if (p->async != EHCI_ASYNC_NONE) {
- usb_packet_unmap(&p->packet, &p->sgl);
- qemu_sglist_destroy(&p->sgl);
- }
- QTAILQ_REMOVE(&p->queue->packets, p, next);
- usb_packet_cleanup(&p->packet);
- g_free(p);
-}
-
-/* queue management */
-
-static EHCIQueue *ehci_alloc_queue(EHCIState *ehci, uint32_t addr, int async)
-{
- EHCIQueueHead *head = async ? &ehci->aqueues : &ehci->pqueues;
- EHCIQueue *q;
-
- q = g_malloc0(sizeof(*q));
- q->ehci = ehci;
- q->qhaddr = addr;
- q->async = async;
- QTAILQ_INIT(&q->packets);
- QTAILQ_INSERT_HEAD(head, q, next);
- trace_usb_ehci_queue_action(q, "alloc");
- return q;
-}
-
-static void ehci_queue_stopped(EHCIQueue *q)
-{
- int endp = get_field(q->qh.epchar, QH_EPCHAR_EP);
-
- if (!q->last_pid || !q->dev) {
- return;
- }
-
- usb_device_ep_stopped(q->dev, usb_ep_get(q->dev, q->last_pid, endp));
-}
-
-static int ehci_cancel_queue(EHCIQueue *q)
-{
- EHCIPacket *p;
- int packets = 0;
-
- p = QTAILQ_FIRST(&q->packets);
- if (p == NULL) {
- goto leave;
- }
-
- trace_usb_ehci_queue_action(q, "cancel");
- do {
- ehci_free_packet(p);
- packets++;
- } while ((p = QTAILQ_FIRST(&q->packets)) != NULL);
-
-leave:
- ehci_queue_stopped(q);
- return packets;
-}
-
-static int ehci_reset_queue(EHCIQueue *q)
-{
- int packets;
-
- trace_usb_ehci_queue_action(q, "reset");
- packets = ehci_cancel_queue(q);
- q->dev = NULL;
- q->qtdaddr = 0;
- q->last_pid = 0;
- return packets;
-}
-
-static void ehci_free_queue(EHCIQueue *q, const char *warn)
-{
- EHCIQueueHead *head = q->async ? &q->ehci->aqueues : &q->ehci->pqueues;
- int cancelled;
-
- trace_usb_ehci_queue_action(q, "free");
- cancelled = ehci_cancel_queue(q);
- if (warn && cancelled > 0) {
- ehci_trace_guest_bug(q->ehci, warn);
- }
- QTAILQ_REMOVE(head, q, next);
- g_free(q);
-}
-
-static EHCIQueue *ehci_find_queue_by_qh(EHCIState *ehci, uint32_t addr,
- int async)
-{
- EHCIQueueHead *head = async ? &ehci->aqueues : &ehci->pqueues;
- EHCIQueue *q;
-
- QTAILQ_FOREACH(q, head, next) {
- if (addr == q->qhaddr) {
- return q;
- }
- }
- return NULL;
-}
-
-static void ehci_queues_rip_unused(EHCIState *ehci, int async)
-{
- EHCIQueueHead *head = async ? &ehci->aqueues : &ehci->pqueues;
- const char *warn = async ? "guest unlinked busy QH" : NULL;
- uint64_t maxage = FRAME_TIMER_NS * ehci->maxframes * 4;
- EHCIQueue *q, *tmp;
-
- QTAILQ_FOREACH_SAFE(q, head, next, tmp) {
- if (q->seen) {
- q->seen = 0;
- q->ts = ehci->last_run_ns;
- continue;
- }
- if (ehci->last_run_ns < q->ts + maxage) {
- continue;
- }
- ehci_free_queue(q, warn);
- }
-}
-
-static void ehci_queues_rip_unseen(EHCIState *ehci, int async)
-{
- EHCIQueueHead *head = async ? &ehci->aqueues : &ehci->pqueues;
- EHCIQueue *q, *tmp;
-
- QTAILQ_FOREACH_SAFE(q, head, next, tmp) {
- if (!q->seen) {
- ehci_free_queue(q, NULL);
- }
- }
-}
-
-static void ehci_queues_rip_device(EHCIState *ehci, USBDevice *dev, int async)
-{
- EHCIQueueHead *head = async ? &ehci->aqueues : &ehci->pqueues;
- EHCIQueue *q, *tmp;
-
- QTAILQ_FOREACH_SAFE(q, head, next, tmp) {
- if (q->dev != dev) {
- continue;
- }
- ehci_free_queue(q, NULL);
- }
-}
-
-static void ehci_queues_rip_all(EHCIState *ehci, int async)
-{
- EHCIQueueHead *head = async ? &ehci->aqueues : &ehci->pqueues;
- const char *warn = async ? "guest stopped busy async schedule" : NULL;
- EHCIQueue *q, *tmp;
-
- QTAILQ_FOREACH_SAFE(q, head, next, tmp) {
- ehci_free_queue(q, warn);
- }
-}
-
-/* Attach or detach a device on root hub */
-
-static void ehci_attach(USBPort *port)
-{
- EHCIState *s = port->opaque;
- uint32_t *portsc = &s->portsc[port->index];
- const char *owner = (*portsc & PORTSC_POWNER) ? "comp" : "ehci";
-
- trace_usb_ehci_port_attach(port->index, owner, port->dev->product_desc);
-
- if (*portsc & PORTSC_POWNER) {
- USBPort *companion = s->companion_ports[port->index];
- companion->dev = port->dev;
- companion->ops->attach(companion);
- return;
- }
-
- *portsc |= PORTSC_CONNECT;
- *portsc |= PORTSC_CSC;
-
- ehci_raise_irq(s, USBSTS_PCD);
-}
-
-static void ehci_detach(USBPort *port)
-{
- EHCIState *s = port->opaque;
- uint32_t *portsc = &s->portsc[port->index];
- const char *owner = (*portsc & PORTSC_POWNER) ? "comp" : "ehci";
-
- trace_usb_ehci_port_detach(port->index, owner);
-
- if (*portsc & PORTSC_POWNER) {
- USBPort *companion = s->companion_ports[port->index];
- companion->ops->detach(companion);
- companion->dev = NULL;
- /*
- * EHCI spec 4.2.2: "When a disconnect occurs... On the event,
- * the port ownership is returned immediately to the EHCI controller."
- */
- *portsc &= ~PORTSC_POWNER;
- return;
- }
-
- ehci_queues_rip_device(s, port->dev, 0);
- ehci_queues_rip_device(s, port->dev, 1);
-
- *portsc &= ~(PORTSC_CONNECT|PORTSC_PED|PORTSC_SUSPEND);
- *portsc |= PORTSC_CSC;
-
- ehci_raise_irq(s, USBSTS_PCD);
-}
-
-static void ehci_child_detach(USBPort *port, USBDevice *child)
-{
- EHCIState *s = port->opaque;
- uint32_t portsc = s->portsc[port->index];
-
- if (portsc & PORTSC_POWNER) {
- USBPort *companion = s->companion_ports[port->index];
- companion->ops->child_detach(companion, child);
- return;
- }
-
- ehci_queues_rip_device(s, child, 0);
- ehci_queues_rip_device(s, child, 1);
-}
-
-static void ehci_wakeup(USBPort *port)
-{
- EHCIState *s = port->opaque;
- uint32_t *portsc = &s->portsc[port->index];
-
- if (*portsc & PORTSC_POWNER) {
- USBPort *companion = s->companion_ports[port->index];
- if (companion->ops->wakeup) {
- companion->ops->wakeup(companion);
- }
- return;
- }
-
- if (*portsc & PORTSC_SUSPEND) {
- trace_usb_ehci_port_wakeup(port->index);
- *portsc |= PORTSC_FPRES;
- ehci_raise_irq(s, USBSTS_PCD);
- }
-
- qemu_bh_schedule(s->async_bh);
-}
-
-static void ehci_register_companion(USBBus *bus, USBPort *ports[],
- uint32_t portcount, uint32_t firstport,
- Error **errp)
-{
- EHCIState *s = container_of(bus, EHCIState, bus);
- uint32_t i;
-
- if (firstport + portcount > NB_PORTS) {
- error_setg(errp, "firstport must be between 0 and %u",
- NB_PORTS - portcount);
- return;
- }
-
- for (i = 0; i < portcount; i++) {
- if (s->companion_ports[firstport + i]) {
- error_setg(errp, "firstport %u asks for ports %u-%u,"
- " but port %u has a companion assigned already",
- firstport, firstport, firstport + portcount - 1,
- firstport + i);
- return;
- }
- }
-
- for (i = 0; i < portcount; i++) {
- s->companion_ports[firstport + i] = ports[i];
- s->ports[firstport + i].speedmask |=
- USB_SPEED_MASK_LOW | USB_SPEED_MASK_FULL;
- /* Ensure devs attached before the initial reset go to the companion */
- s->portsc[firstport + i] = PORTSC_POWNER;
- }
-
- s->companion_count++;
- s->caps[0x05] = (s->companion_count << 4) | portcount;
-}
-
-static void ehci_wakeup_endpoint(USBBus *bus, USBEndpoint *ep,
- unsigned int stream)
-{
- EHCIState *s = container_of(bus, EHCIState, bus);
- uint32_t portsc = s->portsc[ep->dev->port->index];
-
- if (portsc & PORTSC_POWNER) {
- return;
- }
-
- s->periodic_sched_active = PERIODIC_ACTIVE;
- qemu_bh_schedule(s->async_bh);
-}
-
-static USBDevice *ehci_find_device(EHCIState *ehci, uint8_t addr)
-{
- USBDevice *dev;
- USBPort *port;
- int i;
-
- for (i = 0; i < NB_PORTS; i++) {
- port = &ehci->ports[i];
- if (!(ehci->portsc[i] & PORTSC_PED)) {
- DPRINTF("Port %d not enabled\n", i);
- continue;
- }
- dev = usb_find_device(port, addr);
- if (dev != NULL) {
- return dev;
- }
- }
- return NULL;
-}
-
-/* 4.1 host controller initialization */
-void ehci_reset(void *opaque)
-{
- EHCIState *s = opaque;
- int i;
- USBDevice *devs[NB_PORTS];
-
- trace_usb_ehci_reset();
-
- /*
- * Do the detach before touching portsc, so that it correctly gets send to
- * us or to our companion based on PORTSC_POWNER before the reset.
- */
- for(i = 0; i < NB_PORTS; i++) {
- devs[i] = s->ports[i].dev;
- if (devs[i] && devs[i]->attached) {
- usb_detach(&s->ports[i]);
- }
- }
-
- memset(&s->opreg, 0x00, sizeof(s->opreg));
- memset(&s->portsc, 0x00, sizeof(s->portsc));
-
- s->usbcmd = NB_MAXINTRATE << USBCMD_ITC_SH;
- s->usbsts = USBSTS_HALT;
- s->usbsts_pending = 0;
- s->usbsts_frindex = 0;
- ehci_update_irq(s);
-
- s->astate = EST_INACTIVE;
- s->pstate = EST_INACTIVE;
-
- for(i = 0; i < NB_PORTS; i++) {
- if (s->companion_ports[i]) {
- s->portsc[i] = PORTSC_POWNER | PORTSC_PPOWER;
- } else {
- s->portsc[i] = PORTSC_PPOWER;
- }
- if (devs[i] && devs[i]->attached) {
- usb_attach(&s->ports[i]);
- usb_device_reset(devs[i]);
- }
- }
- ehci_queues_rip_all(s, 0);
- ehci_queues_rip_all(s, 1);
- timer_del(s->frame_timer);
- qemu_bh_cancel(s->async_bh);
-}
-
-static uint64_t ehci_caps_read(void *ptr, hwaddr addr,
- unsigned size)
-{
- EHCIState *s = ptr;
- return s->caps[addr];
-}
-
-static void ehci_caps_write(void *ptr, hwaddr addr,
- uint64_t val, unsigned size)
-{
-}
-
-static uint64_t ehci_opreg_read(void *ptr, hwaddr addr,
- unsigned size)
-{
- EHCIState *s = ptr;
- uint32_t val;
-
- switch (addr) {
- case FRINDEX:
- /* Round down to mult of 8, else it can go backwards on migration */
- val = s->frindex & ~7;
- break;
- default:
- val = s->opreg[addr >> 2];
- }
-
- trace_usb_ehci_opreg_read(addr + s->opregbase, addr2str(addr), val);
- return val;
-}
-
-static uint64_t ehci_port_read(void *ptr, hwaddr addr,
- unsigned size)
-{
- EHCIState *s = ptr;
- uint32_t val;
-
- val = s->portsc[addr >> 2];
- trace_usb_ehci_portsc_read(addr + s->portscbase, addr >> 2, val);
- return val;
-}
-
-static void handle_port_owner_write(EHCIState *s, int port, uint32_t owner)
-{
- USBDevice *dev = s->ports[port].dev;
- uint32_t *portsc = &s->portsc[port];
- uint32_t orig;
-
- if (s->companion_ports[port] == NULL)
- return;
-
- owner = owner & PORTSC_POWNER;
- orig = *portsc & PORTSC_POWNER;
-
- if (!(owner ^ orig)) {
- return;
- }
-
- if (dev && dev->attached) {
- usb_detach(&s->ports[port]);
- }
-
- *portsc &= ~PORTSC_POWNER;
- *portsc |= owner;
-
- if (dev && dev->attached) {
- usb_attach(&s->ports[port]);
- }
-}
-
-static void ehci_port_write(void *ptr, hwaddr addr,
- uint64_t val, unsigned size)
-{
- EHCIState *s = ptr;
- int port = addr >> 2;
- uint32_t *portsc = &s->portsc[port];
- uint32_t old = *portsc;
- USBDevice *dev = s->ports[port].dev;
-
- trace_usb_ehci_portsc_write(addr + s->portscbase, addr >> 2, val);
-
- /* Clear rwc bits */
- *portsc &= ~(val & PORTSC_RWC_MASK);
- /* The guest may clear, but not set the PED bit */
- *portsc &= val | ~PORTSC_PED;
- /* POWNER is masked out by RO_MASK as it is RO when we've no companion */
- handle_port_owner_write(s, port, val);
- /* And finally apply RO_MASK */
- val &= PORTSC_RO_MASK;
-
- if ((val & PORTSC_PRESET) && !(*portsc & PORTSC_PRESET)) {
- trace_usb_ehci_port_reset(port, 1);
- }
-
- if (!(val & PORTSC_PRESET) &&(*portsc & PORTSC_PRESET)) {
- trace_usb_ehci_port_reset(port, 0);
- if (dev && dev->attached) {
- usb_port_reset(&s->ports[port]);
- *portsc &= ~PORTSC_CSC;
- }
-
- /*
- * Table 2.16 Set the enable bit(and enable bit change) to indicate
- * to SW that this port has a high speed device attached
- */
- if (dev && dev->attached && (dev->speedmask & USB_SPEED_MASK_HIGH)) {
- val |= PORTSC_PED;
- }
- }
-
- if ((val & PORTSC_SUSPEND) && !(*portsc & PORTSC_SUSPEND)) {
- trace_usb_ehci_port_suspend(port);
- }
- if (!(val & PORTSC_FPRES) && (*portsc & PORTSC_FPRES)) {
- trace_usb_ehci_port_resume(port);
- val &= ~PORTSC_SUSPEND;
- }
-
- *portsc &= ~PORTSC_RO_MASK;
- *portsc |= val;
- trace_usb_ehci_portsc_change(addr + s->portscbase, addr >> 2, *portsc, old);
-}
-
-static void ehci_opreg_write(void *ptr, hwaddr addr,
- uint64_t val, unsigned size)
-{
- EHCIState *s = ptr;
- uint32_t *mmio = s->opreg + (addr >> 2);
- uint32_t old = *mmio;
- int i;
-
- trace_usb_ehci_opreg_write(addr + s->opregbase, addr2str(addr), val);
-
- switch (addr) {
- case USBCMD:
- if (val & USBCMD_HCRESET) {
- ehci_reset(s);
- val = s->usbcmd;
- break;
- }
-
- /* not supporting dynamic frame list size at the moment */
- if ((val & USBCMD_FLS) && !(s->usbcmd & USBCMD_FLS)) {
- fprintf(stderr, "attempt to set frame list size -- value %d\n",
- (int)val & USBCMD_FLS);
- val &= ~USBCMD_FLS;
- }
-
- if (val & USBCMD_IAAD) {
- /*
- * Process IAAD immediately, otherwise the Linux IAAD watchdog may
- * trigger and re-use a qh without us seeing the unlink.
- */
- s->async_stepdown = 0;
- qemu_bh_schedule(s->async_bh);
- trace_usb_ehci_doorbell_ring();
- }
-
- if (((USBCMD_RUNSTOP | USBCMD_PSE | USBCMD_ASE) & val) !=
- ((USBCMD_RUNSTOP | USBCMD_PSE | USBCMD_ASE) & s->usbcmd)) {
- if (s->pstate == EST_INACTIVE) {
- SET_LAST_RUN_CLOCK(s);
- }
- s->usbcmd = val; /* Set usbcmd for ehci_update_halt() */
- ehci_update_halt(s);
- s->async_stepdown = 0;
- qemu_bh_schedule(s->async_bh);
- }
- break;
-
- case USBSTS:
- val &= USBSTS_RO_MASK; // bits 6 through 31 are RO
- ehci_clear_usbsts(s, val); // bits 0 through 5 are R/WC
- val = s->usbsts;
- ehci_update_irq(s);
- break;
-
- case USBINTR:
- val &= USBINTR_MASK;
- if (ehci_enabled(s) && (USBSTS_FLR & val)) {
- qemu_bh_schedule(s->async_bh);
- }
- break;
-
- case FRINDEX:
- val &= 0x00003fff; /* frindex is 14bits */
- s->usbsts_frindex = val;
- break;
-
- case CONFIGFLAG:
- val &= 0x1;
- if (val) {
- for(i = 0; i < NB_PORTS; i++)
- handle_port_owner_write(s, i, 0);
- }
- break;
-
- case PERIODICLISTBASE:
- if (ehci_periodic_enabled(s)) {
- fprintf(stderr,
- "ehci: PERIODIC list base register set while periodic schedule\n"
- " is enabled and HC is enabled\n");
- }
- break;
-
- case ASYNCLISTADDR:
- if (ehci_async_enabled(s)) {
- fprintf(stderr,
- "ehci: ASYNC list address register set while async schedule\n"
- " is enabled and HC is enabled\n");
- }
- break;
- }
-
- *mmio = val;
- trace_usb_ehci_opreg_change(addr + s->opregbase, addr2str(addr),
- *mmio, old);
-}
-
-/*
- * Write the qh back to guest physical memory. This step isn't
- * in the EHCI spec but we need to do it since we don't share
- * physical memory with our guest VM.
- *
- * The first three dwords are read-only for the EHCI, so skip them
- * when writing back the qh.
- */
-static void ehci_flush_qh(EHCIQueue *q)
-{
- uint32_t *qh = (uint32_t *) &q->qh;
- uint32_t dwords = sizeof(EHCIqh) >> 2;
- uint32_t addr = NLPTR_GET(q->qhaddr);
-
- put_dwords(q->ehci, addr + 3 * sizeof(uint32_t), qh + 3, dwords - 3);
-}
-
-// 4.10.2
-
-static int ehci_qh_do_overlay(EHCIQueue *q)
-{
- EHCIPacket *p = QTAILQ_FIRST(&q->packets);
- int i;
- int dtoggle;
- int ping;
- int eps;
- int reload;
-
- assert(p != NULL);
- assert(p->qtdaddr == q->qtdaddr);
-
- // remember values in fields to preserve in qh after overlay
-
- dtoggle = q->qh.token & QTD_TOKEN_DTOGGLE;
- ping = q->qh.token & QTD_TOKEN_PING;
-
- q->qh.current_qtd = p->qtdaddr;
- q->qh.next_qtd = p->qtd.next;
- q->qh.altnext_qtd = p->qtd.altnext;
- q->qh.token = p->qtd.token;
-
-
- eps = get_field(q->qh.epchar, QH_EPCHAR_EPS);
- if (eps == EHCI_QH_EPS_HIGH) {
- q->qh.token &= ~QTD_TOKEN_PING;
- q->qh.token |= ping;
- }
-
- reload = get_field(q->qh.epchar, QH_EPCHAR_RL);
- set_field(&q->qh.altnext_qtd, reload, QH_ALTNEXT_NAKCNT);
-
- for (i = 0; i < 5; i++) {
- q->qh.bufptr[i] = p->qtd.bufptr[i];
- }
-
- if (!(q->qh.epchar & QH_EPCHAR_DTC)) {
- // preserve QH DT bit
- q->qh.token &= ~QTD_TOKEN_DTOGGLE;
- q->qh.token |= dtoggle;
- }
-
- q->qh.bufptr[1] &= ~BUFPTR_CPROGMASK_MASK;
- q->qh.bufptr[2] &= ~BUFPTR_FRAMETAG_MASK;
-
- ehci_flush_qh(q);
-
- return 0;
-}
-
-static int ehci_init_transfer(EHCIPacket *p)
-{
- uint32_t cpage, offset, bytes, plen;
- dma_addr_t page;
-
- cpage = get_field(p->qtd.token, QTD_TOKEN_CPAGE);
- bytes = get_field(p->qtd.token, QTD_TOKEN_TBYTES);
- offset = p->qtd.bufptr[0] & ~QTD_BUFPTR_MASK;
- qemu_sglist_init(&p->sgl, p->queue->ehci->device, 5, p->queue->ehci->as);
-
- while (bytes > 0) {
- if (cpage > 4) {
- fprintf(stderr, "cpage out of range (%d)\n", cpage);
- return -1;
- }
-
- page = p->qtd.bufptr[cpage] & QTD_BUFPTR_MASK;
- page += offset;
- plen = bytes;
- if (plen > 4096 - offset) {
- plen = 4096 - offset;
- offset = 0;
- cpage++;
- }
-
- qemu_sglist_add(&p->sgl, page, plen);
- bytes -= plen;
- }
- return 0;
-}
-
-static void ehci_finish_transfer(EHCIQueue *q, int len)
-{
- uint32_t cpage, offset;
-
- if (len > 0) {
- /* update cpage & offset */
- cpage = get_field(q->qh.token, QTD_TOKEN_CPAGE);
- offset = q->qh.bufptr[0] & ~QTD_BUFPTR_MASK;
-
- offset += len;
- cpage += offset >> QTD_BUFPTR_SH;
- offset &= ~QTD_BUFPTR_MASK;
-
- set_field(&q->qh.token, cpage, QTD_TOKEN_CPAGE);
- q->qh.bufptr[0] &= QTD_BUFPTR_MASK;
- q->qh.bufptr[0] |= offset;
- }
-}
-
-static void ehci_async_complete_packet(USBPort *port, USBPacket *packet)
-{
- EHCIPacket *p;
- EHCIState *s = port->opaque;
- uint32_t portsc = s->portsc[port->index];
-
- if (portsc & PORTSC_POWNER) {
- USBPort *companion = s->companion_ports[port->index];
- companion->ops->complete(companion, packet);
- return;
- }
-
- p = container_of(packet, EHCIPacket, packet);
- assert(p->async == EHCI_ASYNC_INFLIGHT);
-
- if (packet->status == USB_RET_REMOVE_FROM_QUEUE) {
- trace_usb_ehci_packet_action(p->queue, p, "remove");
- ehci_free_packet(p);
- return;
- }
-
- trace_usb_ehci_packet_action(p->queue, p, "wakeup");
- p->async = EHCI_ASYNC_FINISHED;
-
- if (!p->queue->async) {
- s->periodic_sched_active = PERIODIC_ACTIVE;
- }
- qemu_bh_schedule(s->async_bh);
-}
-
-static void ehci_execute_complete(EHCIQueue *q)
-{
- EHCIPacket *p = QTAILQ_FIRST(&q->packets);
- uint32_t tbytes;
-
- assert(p != NULL);
- assert(p->qtdaddr == q->qtdaddr);
- assert(p->async == EHCI_ASYNC_INITIALIZED ||
- p->async == EHCI_ASYNC_FINISHED);
-
- DPRINTF("execute_complete: qhaddr 0x%x, next 0x%x, qtdaddr 0x%x, "
- "status %d, actual_length %d\n",
- q->qhaddr, q->qh.next, q->qtdaddr,
- p->packet.status, p->packet.actual_length);
-
- switch (p->packet.status) {
- case USB_RET_SUCCESS:
- break;
- case USB_RET_IOERROR:
- case USB_RET_NODEV:
- q->qh.token |= (QTD_TOKEN_HALT | QTD_TOKEN_XACTERR);
- set_field(&q->qh.token, 0, QTD_TOKEN_CERR);
- ehci_raise_irq(q->ehci, USBSTS_ERRINT);
- break;
- case USB_RET_STALL:
- q->qh.token |= QTD_TOKEN_HALT;
- ehci_raise_irq(q->ehci, USBSTS_ERRINT);
- break;
- case USB_RET_NAK:
- set_field(&q->qh.altnext_qtd, 0, QH_ALTNEXT_NAKCNT);
- return; /* We're not done yet with this transaction */
- case USB_RET_BABBLE:
- q->qh.token |= (QTD_TOKEN_HALT | QTD_TOKEN_BABBLE);
- ehci_raise_irq(q->ehci, USBSTS_ERRINT);
- break;
- default:
- /* should not be triggerable */
- fprintf(stderr, "USB invalid response %d\n", p->packet.status);
- g_assert_not_reached();
- break;
- }
-
- /* TODO check 4.12 for splits */
- tbytes = get_field(q->qh.token, QTD_TOKEN_TBYTES);
- if (tbytes && p->pid == USB_TOKEN_IN) {
- tbytes -= p->packet.actual_length;
- if (tbytes) {
- /* 4.15.1.2 must raise int on a short input packet */
- ehci_raise_irq(q->ehci, USBSTS_INT);
- if (q->async) {
- q->ehci->int_req_by_async = true;
- }
- }
- } else {
- tbytes = 0;
- }
- DPRINTF("updating tbytes to %d\n", tbytes);
- set_field(&q->qh.token, tbytes, QTD_TOKEN_TBYTES);
-
- ehci_finish_transfer(q, p->packet.actual_length);
- usb_packet_unmap(&p->packet, &p->sgl);
- qemu_sglist_destroy(&p->sgl);
- p->async = EHCI_ASYNC_NONE;
-
- q->qh.token ^= QTD_TOKEN_DTOGGLE;
- q->qh.token &= ~QTD_TOKEN_ACTIVE;
-
- if (q->qh.token & QTD_TOKEN_IOC) {
- ehci_raise_irq(q->ehci, USBSTS_INT);
- if (q->async) {
- q->ehci->int_req_by_async = true;
- }
- }
-}
-
-/* 4.10.3 returns "again" */
-static int ehci_execute(EHCIPacket *p, const char *action)
-{
- USBEndpoint *ep;
- int endp;
- bool spd;
-
- assert(p->async == EHCI_ASYNC_NONE ||
- p->async == EHCI_ASYNC_INITIALIZED);
-
- if (!(p->qtd.token & QTD_TOKEN_ACTIVE)) {
- fprintf(stderr, "Attempting to execute inactive qtd\n");
- return -1;
- }
-
- if (get_field(p->qtd.token, QTD_TOKEN_TBYTES) > BUFF_SIZE) {
- ehci_trace_guest_bug(p->queue->ehci,
- "guest requested more bytes than allowed");
- return -1;
- }
-
- if (!ehci_verify_pid(p->queue, &p->qtd)) {
- ehci_queue_stopped(p->queue); /* Mark the ep in the prev dir stopped */
- }
- p->pid = ehci_get_pid(&p->qtd);
- p->queue->last_pid = p->pid;
- endp = get_field(p->queue->qh.epchar, QH_EPCHAR_EP);
- ep = usb_ep_get(p->queue->dev, p->pid, endp);
-
- if (p->async == EHCI_ASYNC_NONE) {
- if (ehci_init_transfer(p) != 0) {
- return -1;
- }
-
- spd = (p->pid == USB_TOKEN_IN && NLPTR_TBIT(p->qtd.altnext) == 0);
- usb_packet_setup(&p->packet, p->pid, ep, 0, p->qtdaddr, spd,
- (p->qtd.token & QTD_TOKEN_IOC) != 0);
- usb_packet_map(&p->packet, &p->sgl);
- p->async = EHCI_ASYNC_INITIALIZED;
- }
-
- trace_usb_ehci_packet_action(p->queue, p, action);
- usb_handle_packet(p->queue->dev, &p->packet);
- DPRINTF("submit: qh 0x%x next 0x%x qtd 0x%x pid 0x%x len %zd endp 0x%x "
- "status %d actual_length %d\n", p->queue->qhaddr, p->qtd.next,
- p->qtdaddr, p->pid, p->packet.iov.size, endp, p->packet.status,
- p->packet.actual_length);
-
- if (p->packet.actual_length > BUFF_SIZE) {
- fprintf(stderr, "ret from usb_handle_packet > BUFF_SIZE\n");
- return -1;
- }
-
- return 1;
-}
-
-/* 4.7.2
- */
-
-static int ehci_process_itd(EHCIState *ehci,
- EHCIitd *itd,
- uint32_t addr)
-{
- USBDevice *dev;
- USBEndpoint *ep;
- uint32_t i, len, pid, dir, devaddr, endp;
- uint32_t pg, off, ptr1, ptr2, max, mult;
-
- ehci->periodic_sched_active = PERIODIC_ACTIVE;
-
- dir =(itd->bufptr[1] & ITD_BUFPTR_DIRECTION);
- devaddr = get_field(itd->bufptr[0], ITD_BUFPTR_DEVADDR);
- endp = get_field(itd->bufptr[0], ITD_BUFPTR_EP);
- max = get_field(itd->bufptr[1], ITD_BUFPTR_MAXPKT);
- mult = get_field(itd->bufptr[2], ITD_BUFPTR_MULT);
-
- for(i = 0; i < 8; i++) {
- if (itd->transact[i] & ITD_XACT_ACTIVE) {
- pg = get_field(itd->transact[i], ITD_XACT_PGSEL);
- off = itd->transact[i] & ITD_XACT_OFFSET_MASK;
- len = get_field(itd->transact[i], ITD_XACT_LENGTH);
-
- if (len > max * mult) {
- len = max * mult;
- }
- if (len > BUFF_SIZE || pg > 6) {
- return -1;
- }
-
- ptr1 = (itd->bufptr[pg] & ITD_BUFPTR_MASK);
- qemu_sglist_init(&ehci->isgl, ehci->device, 2, ehci->as);
- if (off + len > 4096) {
- /* transfer crosses page border */
- if (pg == 6) {
- return -1; /* avoid page pg + 1 */
- }
- ptr2 = (itd->bufptr[pg + 1] & ITD_BUFPTR_MASK);
- uint32_t len2 = off + len - 4096;
- uint32_t len1 = len - len2;
- qemu_sglist_add(&ehci->isgl, ptr1 + off, len1);
- qemu_sglist_add(&ehci->isgl, ptr2, len2);
- } else {
- qemu_sglist_add(&ehci->isgl, ptr1 + off, len);
- }
-
- pid = dir ? USB_TOKEN_IN : USB_TOKEN_OUT;
-
- dev = ehci_find_device(ehci, devaddr);
- ep = usb_ep_get(dev, pid, endp);
- if (ep && ep->type == USB_ENDPOINT_XFER_ISOC) {
- usb_packet_setup(&ehci->ipacket, pid, ep, 0, addr, false,
- (itd->transact[i] & ITD_XACT_IOC) != 0);
- usb_packet_map(&ehci->ipacket, &ehci->isgl);
- usb_handle_packet(dev, &ehci->ipacket);
- usb_packet_unmap(&ehci->ipacket, &ehci->isgl);
- } else {
- DPRINTF("ISOCH: attempt to addess non-iso endpoint\n");
- ehci->ipacket.status = USB_RET_NAK;
- ehci->ipacket.actual_length = 0;
- }
- qemu_sglist_destroy(&ehci->isgl);
-
- switch (ehci->ipacket.status) {
- case USB_RET_SUCCESS:
- break;
- default:
- fprintf(stderr, "Unexpected iso usb result: %d\n",
- ehci->ipacket.status);
- /* Fall through */
- case USB_RET_IOERROR:
- case USB_RET_NODEV:
- /* 3.3.2: XACTERR is only allowed on IN transactions */
- if (dir) {
- itd->transact[i] |= ITD_XACT_XACTERR;
- ehci_raise_irq(ehci, USBSTS_ERRINT);
- }
- break;
- case USB_RET_BABBLE:
- itd->transact[i] |= ITD_XACT_BABBLE;
- ehci_raise_irq(ehci, USBSTS_ERRINT);
- break;
- case USB_RET_NAK:
- /* no data for us, so do a zero-length transfer */
- ehci->ipacket.actual_length = 0;
- break;
- }
- if (!dir) {
- set_field(&itd->transact[i], len - ehci->ipacket.actual_length,
- ITD_XACT_LENGTH); /* OUT */
- } else {
- set_field(&itd->transact[i], ehci->ipacket.actual_length,
- ITD_XACT_LENGTH); /* IN */
- }
- if (itd->transact[i] & ITD_XACT_IOC) {
- ehci_raise_irq(ehci, USBSTS_INT);
- }
- itd->transact[i] &= ~ITD_XACT_ACTIVE;
- }
- }
- return 0;
-}
-
-
-/* This state is the entry point for asynchronous schedule
- * processing. Entry here consitutes a EHCI start event state (4.8.5)
- */
-static int ehci_state_waitlisthead(EHCIState *ehci, int async)
-{
- EHCIqh qh;
- int i = 0;
- int again = 0;
- uint32_t entry = ehci->asynclistaddr;
-
- /* set reclamation flag at start event (4.8.6) */
- if (async) {
- ehci_set_usbsts(ehci, USBSTS_REC);
- }
-
- ehci_queues_rip_unused(ehci, async);
-
- /* Find the head of the list (4.9.1.1) */
- for(i = 0; i < MAX_QH; i++) {
- if (get_dwords(ehci, NLPTR_GET(entry), (uint32_t *) &qh,
- sizeof(EHCIqh) >> 2) < 0) {
- return 0;
- }
- ehci_trace_qh(NULL, NLPTR_GET(entry), &qh);
-
- if (qh.epchar & QH_EPCHAR_H) {
- if (async) {
- entry |= (NLPTR_TYPE_QH << 1);
- }
-
- ehci_set_fetch_addr(ehci, async, entry);
- ehci_set_state(ehci, async, EST_FETCHENTRY);
- again = 1;
- goto out;
- }
-
- entry = qh.next;
- if (entry == ehci->asynclistaddr) {
- break;
- }
- }
-
- /* no head found for list. */
-
- ehci_set_state(ehci, async, EST_ACTIVE);
-
-out:
- return again;
-}
-
-
-/* This state is the entry point for periodic schedule processing as
- * well as being a continuation state for async processing.
- */
-static int ehci_state_fetchentry(EHCIState *ehci, int async)
-{
- int again = 0;
- uint32_t entry = ehci_get_fetch_addr(ehci, async);
-
- if (NLPTR_TBIT(entry)) {
- ehci_set_state(ehci, async, EST_ACTIVE);
- goto out;
- }
-
- /* section 4.8, only QH in async schedule */
- if (async && (NLPTR_TYPE_GET(entry) != NLPTR_TYPE_QH)) {
- fprintf(stderr, "non queue head request in async schedule\n");
- return -1;
- }
-
- switch (NLPTR_TYPE_GET(entry)) {
- case NLPTR_TYPE_QH:
- ehci_set_state(ehci, async, EST_FETCHQH);
- again = 1;
- break;
-
- case NLPTR_TYPE_ITD:
- ehci_set_state(ehci, async, EST_FETCHITD);
- again = 1;
- break;
-
- case NLPTR_TYPE_STITD:
- ehci_set_state(ehci, async, EST_FETCHSITD);
- again = 1;
- break;
-
- default:
- /* TODO: handle FSTN type */
- fprintf(stderr, "FETCHENTRY: entry at %X is of type %d "
- "which is not supported yet\n", entry, NLPTR_TYPE_GET(entry));
- return -1;
- }
-
-out:
- return again;
-}
-
-static EHCIQueue *ehci_state_fetchqh(EHCIState *ehci, int async)
-{
- uint32_t entry;
- EHCIQueue *q;
- EHCIqh qh;
-
- entry = ehci_get_fetch_addr(ehci, async);
- q = ehci_find_queue_by_qh(ehci, entry, async);
- if (q == NULL) {
- q = ehci_alloc_queue(ehci, entry, async);
- }
-
- q->seen++;
- if (q->seen > 1) {
- /* we are going in circles -- stop processing */
- ehci_set_state(ehci, async, EST_ACTIVE);
- q = NULL;
- goto out;
- }
-
- if (get_dwords(ehci, NLPTR_GET(q->qhaddr),
- (uint32_t *) &qh, sizeof(EHCIqh) >> 2) < 0) {
- q = NULL;
- goto out;
- }
- ehci_trace_qh(q, NLPTR_GET(q->qhaddr), &qh);
-
- /*
- * The overlay area of the qh should never be changed by the guest,
- * except when idle, in which case the reset is a nop.
- */
- if (!ehci_verify_qh(q, &qh)) {
- if (ehci_reset_queue(q) > 0) {
- ehci_trace_guest_bug(ehci, "guest updated active QH");
- }
- }
- q->qh = qh;
-
- q->transact_ctr = get_field(q->qh.epcap, QH_EPCAP_MULT);
- if (q->transact_ctr == 0) { /* Guest bug in some versions of windows */
- q->transact_ctr = 4;
- }
-
- if (q->dev == NULL) {
- q->dev = ehci_find_device(q->ehci,
- get_field(q->qh.epchar, QH_EPCHAR_DEVADDR));
- }
-
- if (async && (q->qh.epchar & QH_EPCHAR_H)) {
-
- /* EHCI spec version 1.0 Section 4.8.3 & 4.10.1 */
- if (ehci->usbsts & USBSTS_REC) {
- ehci_clear_usbsts(ehci, USBSTS_REC);
- } else {
- DPRINTF("FETCHQH: QH 0x%08x. H-bit set, reclamation status reset"
- " - done processing\n", q->qhaddr);
- ehci_set_state(ehci, async, EST_ACTIVE);
- q = NULL;
- goto out;
- }
- }
-
-#if EHCI_DEBUG
- if (q->qhaddr != q->qh.next) {
- DPRINTF("FETCHQH: QH 0x%08x (h %x halt %x active %x) next 0x%08x\n",
- q->qhaddr,
- q->qh.epchar & QH_EPCHAR_H,
- q->qh.token & QTD_TOKEN_HALT,
- q->qh.token & QTD_TOKEN_ACTIVE,
- q->qh.next);
- }
-#endif
-
- if (q->qh.token & QTD_TOKEN_HALT) {
- ehci_set_state(ehci, async, EST_HORIZONTALQH);
-
- } else if ((q->qh.token & QTD_TOKEN_ACTIVE) &&
- (NLPTR_TBIT(q->qh.current_qtd) == 0)) {
- q->qtdaddr = q->qh.current_qtd;
- ehci_set_state(ehci, async, EST_FETCHQTD);
-
- } else {
- /* EHCI spec version 1.0 Section 4.10.2 */
- ehci_set_state(ehci, async, EST_ADVANCEQUEUE);
- }
-
-out:
- return q;
-}
-
-static int ehci_state_fetchitd(EHCIState *ehci, int async)
-{
- uint32_t entry;
- EHCIitd itd;
-
- assert(!async);
- entry = ehci_get_fetch_addr(ehci, async);
-
- if (get_dwords(ehci, NLPTR_GET(entry), (uint32_t *) &itd,
- sizeof(EHCIitd) >> 2) < 0) {
- return -1;
- }
- ehci_trace_itd(ehci, entry, &itd);
-
- if (ehci_process_itd(ehci, &itd, entry) != 0) {
- return -1;
- }
-
- put_dwords(ehci, NLPTR_GET(entry), (uint32_t *) &itd,
- sizeof(EHCIitd) >> 2);
- ehci_set_fetch_addr(ehci, async, itd.next);
- ehci_set_state(ehci, async, EST_FETCHENTRY);
-
- return 1;
-}
-
-static int ehci_state_fetchsitd(EHCIState *ehci, int async)
-{
- uint32_t entry;
- EHCIsitd sitd;
-
- assert(!async);
- entry = ehci_get_fetch_addr(ehci, async);
-
- if (get_dwords(ehci, NLPTR_GET(entry), (uint32_t *)&sitd,
- sizeof(EHCIsitd) >> 2) < 0) {
- return 0;
- }
- ehci_trace_sitd(ehci, entry, &sitd);
-
- if (!(sitd.results & SITD_RESULTS_ACTIVE)) {
- /* siTD is not active, nothing to do */;
- } else {
- /* TODO: split transfers are not implemented */
- fprintf(stderr, "WARNING: Skipping active siTD\n");
- }
-
- ehci_set_fetch_addr(ehci, async, sitd.next);
- ehci_set_state(ehci, async, EST_FETCHENTRY);
- return 1;
-}
-
-/* Section 4.10.2 - paragraph 3 */
-static int ehci_state_advqueue(EHCIQueue *q)
-{
-#if 0
- /* TO-DO: 4.10.2 - paragraph 2
- * if I-bit is set to 1 and QH is not active
- * go to horizontal QH
- */
- if (I-bit set) {
- ehci_set_state(ehci, async, EST_HORIZONTALQH);
- goto out;
- }
-#endif
-
- /*
- * want data and alt-next qTD is valid
- */
- if (((q->qh.token & QTD_TOKEN_TBYTES_MASK) != 0) &&
- (NLPTR_TBIT(q->qh.altnext_qtd) == 0)) {
- q->qtdaddr = q->qh.altnext_qtd;
- ehci_set_state(q->ehci, q->async, EST_FETCHQTD);
-
- /*
- * next qTD is valid
- */
- } else if (NLPTR_TBIT(q->qh.next_qtd) == 0) {
- q->qtdaddr = q->qh.next_qtd;
- ehci_set_state(q->ehci, q->async, EST_FETCHQTD);
-
- /*
- * no valid qTD, try next QH
- */
- } else {
- ehci_set_state(q->ehci, q->async, EST_HORIZONTALQH);
- }
-
- return 1;
-}
-
-/* Section 4.10.2 - paragraph 4 */
-static int ehci_state_fetchqtd(EHCIQueue *q)
-{
- EHCIqtd qtd;
- EHCIPacket *p;
- int again = 1;
-
- if (get_dwords(q->ehci, NLPTR_GET(q->qtdaddr), (uint32_t *) &qtd,
- sizeof(EHCIqtd) >> 2) < 0) {
- return 0;
- }
- ehci_trace_qtd(q, NLPTR_GET(q->qtdaddr), &qtd);
-
- p = QTAILQ_FIRST(&q->packets);
- if (p != NULL) {
- if (!ehci_verify_qtd(p, &qtd)) {
- ehci_cancel_queue(q);
- if (qtd.token & QTD_TOKEN_ACTIVE) {
- ehci_trace_guest_bug(q->ehci, "guest updated active qTD");
- }
- p = NULL;
- } else {
- p->qtd = qtd;
- ehci_qh_do_overlay(q);
- }
- }
-
- if (!(qtd.token & QTD_TOKEN_ACTIVE)) {
- ehci_set_state(q->ehci, q->async, EST_HORIZONTALQH);
- } else if (p != NULL) {
- switch (p->async) {
- case EHCI_ASYNC_NONE:
- case EHCI_ASYNC_INITIALIZED:
- /* Not yet executed (MULT), or previously nacked (int) packet */
- ehci_set_state(q->ehci, q->async, EST_EXECUTE);
- break;
- case EHCI_ASYNC_INFLIGHT:
- /* Check if the guest has added new tds to the queue */
- again = ehci_fill_queue(QTAILQ_LAST(&q->packets, pkts_head));
- /* Unfinished async handled packet, go horizontal */
- ehci_set_state(q->ehci, q->async, EST_HORIZONTALQH);
- break;
- case EHCI_ASYNC_FINISHED:
- /* Complete executing of the packet */
- ehci_set_state(q->ehci, q->async, EST_EXECUTING);
- break;
- }
- } else {
- p = ehci_alloc_packet(q);
- p->qtdaddr = q->qtdaddr;
- p->qtd = qtd;
- ehci_set_state(q->ehci, q->async, EST_EXECUTE);
- }
-
- return again;
-}
-
-static int ehci_state_horizqh(EHCIQueue *q)
-{
- int again = 0;
-
- if (ehci_get_fetch_addr(q->ehci, q->async) != q->qh.next) {
- ehci_set_fetch_addr(q->ehci, q->async, q->qh.next);
- ehci_set_state(q->ehci, q->async, EST_FETCHENTRY);
- again = 1;
- } else {
- ehci_set_state(q->ehci, q->async, EST_ACTIVE);
- }
-
- return again;
-}
-
-/* Returns "again" */
-static int ehci_fill_queue(EHCIPacket *p)
-{
- USBEndpoint *ep = p->packet.ep;
- EHCIQueue *q = p->queue;
- EHCIqtd qtd = p->qtd;
- uint32_t qtdaddr;
-
- for (;;) {
- if (NLPTR_TBIT(qtd.next) != 0) {
- break;
- }
- qtdaddr = qtd.next;
- /*
- * Detect circular td lists, Windows creates these, counting on the
- * active bit going low after execution to make the queue stop.
- */
- QTAILQ_FOREACH(p, &q->packets, next) {
- if (p->qtdaddr == qtdaddr) {
- goto leave;
- }
- }
- if (get_dwords(q->ehci, NLPTR_GET(qtdaddr),
- (uint32_t *) &qtd, sizeof(EHCIqtd) >> 2) < 0) {
- return -1;
- }
- ehci_trace_qtd(q, NLPTR_GET(qtdaddr), &qtd);
- if (!(qtd.token & QTD_TOKEN_ACTIVE)) {
- break;
- }
- if (!ehci_verify_pid(q, &qtd)) {
- ehci_trace_guest_bug(q->ehci, "guest queued token with wrong pid");
- break;
- }
- p = ehci_alloc_packet(q);
- p->qtdaddr = qtdaddr;
- p->qtd = qtd;
- if (ehci_execute(p, "queue") == -1) {
- return -1;
- }
- assert(p->packet.status == USB_RET_ASYNC);
- p->async = EHCI_ASYNC_INFLIGHT;
- }
-leave:
- usb_device_flush_ep_queue(ep->dev, ep);
- return 1;
-}
-
-static int ehci_state_execute(EHCIQueue *q)
-{
- EHCIPacket *p = QTAILQ_FIRST(&q->packets);
- int again = 0;
-
- assert(p != NULL);
- assert(p->qtdaddr == q->qtdaddr);
-
- if (ehci_qh_do_overlay(q) != 0) {
- return -1;
- }
-
- // TODO verify enough time remains in the uframe as in 4.4.1.1
- // TODO write back ptr to async list when done or out of time
-
- /* 4.10.3, bottom of page 82, go horizontal on transaction counter == 0 */
- if (!q->async && q->transact_ctr == 0) {
- ehci_set_state(q->ehci, q->async, EST_HORIZONTALQH);
- again = 1;
- goto out;
- }
-
- if (q->async) {
- ehci_set_usbsts(q->ehci, USBSTS_REC);
- }
-
- again = ehci_execute(p, "process");
- if (again == -1) {
- goto out;
- }
- if (p->packet.status == USB_RET_ASYNC) {
- ehci_flush_qh(q);
- trace_usb_ehci_packet_action(p->queue, p, "async");
- p->async = EHCI_ASYNC_INFLIGHT;
- ehci_set_state(q->ehci, q->async, EST_HORIZONTALQH);
- if (q->async) {
- again = ehci_fill_queue(p);
- } else {
- again = 1;
- }
- goto out;
- }
-
- ehci_set_state(q->ehci, q->async, EST_EXECUTING);
- again = 1;
-
-out:
- return again;
-}
-
-static int ehci_state_executing(EHCIQueue *q)
-{
- EHCIPacket *p = QTAILQ_FIRST(&q->packets);
-
- assert(p != NULL);
- assert(p->qtdaddr == q->qtdaddr);
-
- ehci_execute_complete(q);
-
- /* 4.10.3 */
- if (!q->async && q->transact_ctr > 0) {
- q->transact_ctr--;
- }
-
- /* 4.10.5 */
- if (p->packet.status == USB_RET_NAK) {
- ehci_set_state(q->ehci, q->async, EST_HORIZONTALQH);
- } else {
- ehci_set_state(q->ehci, q->async, EST_WRITEBACK);
- }
-
- ehci_flush_qh(q);
- return 1;
-}
-
-
-static int ehci_state_writeback(EHCIQueue *q)
-{
- EHCIPacket *p = QTAILQ_FIRST(&q->packets);
- uint32_t *qtd, addr;
- int again = 0;
-
- /* Write back the QTD from the QH area */
- assert(p != NULL);
- assert(p->qtdaddr == q->qtdaddr);
-
- ehci_trace_qtd(q, NLPTR_GET(p->qtdaddr), (EHCIqtd *) &q->qh.next_qtd);
- qtd = (uint32_t *) &q->qh.next_qtd;
- addr = NLPTR_GET(p->qtdaddr);
- put_dwords(q->ehci, addr + 2 * sizeof(uint32_t), qtd + 2, 2);
- ehci_free_packet(p);
-
- /*
- * EHCI specs say go horizontal here.
- *
- * We can also advance the queue here for performance reasons. We
- * need to take care to only take that shortcut in case we've
- * processed the qtd just written back without errors, i.e. halt
- * bit is clear.
- */
- if (q->qh.token & QTD_TOKEN_HALT) {
- ehci_set_state(q->ehci, q->async, EST_HORIZONTALQH);
- again = 1;
- } else {
- ehci_set_state(q->ehci, q->async, EST_ADVANCEQUEUE);
- again = 1;
- }
- return again;
-}
-
-/*
- * This is the state machine that is common to both async and periodic
- */
-
-static void ehci_advance_state(EHCIState *ehci, int async)
-{
- EHCIQueue *q = NULL;
- int itd_count = 0;
- int again;
-
- do {
- switch(ehci_get_state(ehci, async)) {
- case EST_WAITLISTHEAD:
- again = ehci_state_waitlisthead(ehci, async);
- break;
-
- case EST_FETCHENTRY:
- again = ehci_state_fetchentry(ehci, async);
- break;
-
- case EST_FETCHQH:
- q = ehci_state_fetchqh(ehci, async);
- if (q != NULL) {
- assert(q->async == async);
- again = 1;
- } else {
- again = 0;
- }
- break;
-
- case EST_FETCHITD:
- again = ehci_state_fetchitd(ehci, async);
- itd_count++;
- break;
-
- case EST_FETCHSITD:
- again = ehci_state_fetchsitd(ehci, async);
- itd_count++;
- break;
-
- case EST_ADVANCEQUEUE:
- assert(q != NULL);
- again = ehci_state_advqueue(q);
- break;
-
- case EST_FETCHQTD:
- assert(q != NULL);
- again = ehci_state_fetchqtd(q);
- break;
-
- case EST_HORIZONTALQH:
- assert(q != NULL);
- again = ehci_state_horizqh(q);
- break;
-
- case EST_EXECUTE:
- assert(q != NULL);
- again = ehci_state_execute(q);
- if (async) {
- ehci->async_stepdown = 0;
- }
- break;
-
- case EST_EXECUTING:
- assert(q != NULL);
- if (async) {
- ehci->async_stepdown = 0;
- }
- again = ehci_state_executing(q);
- break;
-
- case EST_WRITEBACK:
- assert(q != NULL);
- again = ehci_state_writeback(q);
- if (!async) {
- ehci->periodic_sched_active = PERIODIC_ACTIVE;
- }
- break;
-
- default:
- fprintf(stderr, "Bad state!\n");
- again = -1;
- g_assert_not_reached();
- break;
- }
-
- if (again < 0 || itd_count > 16) {
- /* TODO: notify guest (raise HSE irq?) */
- fprintf(stderr, "processing error - resetting ehci HC\n");
- ehci_reset(ehci);
- again = 0;
- }
- }
- while (again);
-}
-
-static void ehci_advance_async_state(EHCIState *ehci)
-{
- const int async = 1;
-
- switch(ehci_get_state(ehci, async)) {
- case EST_INACTIVE:
- if (!ehci_async_enabled(ehci)) {
- break;
- }
- ehci_set_state(ehci, async, EST_ACTIVE);
- // No break, fall through to ACTIVE
-
- case EST_ACTIVE:
- if (!ehci_async_enabled(ehci)) {
- ehci_queues_rip_all(ehci, async);
- ehci_set_state(ehci, async, EST_INACTIVE);
- break;
- }
-
- /* make sure guest has acknowledged the doorbell interrupt */
- /* TO-DO: is this really needed? */
- if (ehci->usbsts & USBSTS_IAA) {
- DPRINTF("IAA status bit still set.\n");
- break;
- }
-
- /* check that address register has been set */
- if (ehci->asynclistaddr == 0) {
- break;
- }
-
- ehci_set_state(ehci, async, EST_WAITLISTHEAD);
- ehci_advance_state(ehci, async);
-
- /* If the doorbell is set, the guest wants to make a change to the
- * schedule. The host controller needs to release cached data.
- * (section 4.8.2)
- */
- if (ehci->usbcmd & USBCMD_IAAD) {
- /* Remove all unseen qhs from the async qhs queue */
- ehci_queues_rip_unseen(ehci, async);
- trace_usb_ehci_doorbell_ack();
- ehci->usbcmd &= ~USBCMD_IAAD;
- ehci_raise_irq(ehci, USBSTS_IAA);
- }
- break;
-
- default:
- /* this should only be due to a developer mistake */
- fprintf(stderr, "ehci: Bad asynchronous state %d. "
- "Resetting to active\n", ehci->astate);
- g_assert_not_reached();
- }
-}
-
-static void ehci_advance_periodic_state(EHCIState *ehci)
-{
- uint32_t entry;
- uint32_t list;
- const int async = 0;
-
- // 4.6
-
- switch(ehci_get_state(ehci, async)) {
- case EST_INACTIVE:
- if (!(ehci->frindex & 7) && ehci_periodic_enabled(ehci)) {
- ehci_set_state(ehci, async, EST_ACTIVE);
- // No break, fall through to ACTIVE
- } else
- break;
-
- case EST_ACTIVE:
- if (!(ehci->frindex & 7) && !ehci_periodic_enabled(ehci)) {
- ehci_queues_rip_all(ehci, async);
- ehci_set_state(ehci, async, EST_INACTIVE);
- break;
- }
-
- list = ehci->periodiclistbase & 0xfffff000;
- /* check that register has been set */
- if (list == 0) {
- break;
- }
- list |= ((ehci->frindex & 0x1ff8) >> 1);
-
- if (get_dwords(ehci, list, &entry, 1) < 0) {
- break;
- }
-
- DPRINTF("PERIODIC state adv fr=%d. [%08X] -> %08X\n",
- ehci->frindex / 8, list, entry);
- ehci_set_fetch_addr(ehci, async,entry);
- ehci_set_state(ehci, async, EST_FETCHENTRY);
- ehci_advance_state(ehci, async);
- ehci_queues_rip_unused(ehci, async);
- break;
-
- default:
- /* this should only be due to a developer mistake */
- fprintf(stderr, "ehci: Bad periodic state %d. "
- "Resetting to active\n", ehci->pstate);
- g_assert_not_reached();
- }
-}
-
-static void ehci_update_frindex(EHCIState *ehci, int uframes)
-{
- int i;
-
- if (!ehci_enabled(ehci) && ehci->pstate == EST_INACTIVE) {
- return;
- }
-
- for (i = 0; i < uframes; i++) {
- ehci->frindex++;
-
- if (ehci->frindex == 0x00002000) {
- ehci_raise_irq(ehci, USBSTS_FLR);
- }
-
- if (ehci->frindex == 0x00004000) {
- ehci_raise_irq(ehci, USBSTS_FLR);
- ehci->frindex = 0;
- if (ehci->usbsts_frindex >= 0x00004000) {
- ehci->usbsts_frindex -= 0x00004000;
- } else {
- ehci->usbsts_frindex = 0;
- }
- }
- }
-}
-
-static void ehci_frame_timer(void *opaque)
-{
- EHCIState *ehci = opaque;
- int need_timer = 0;
- int64_t expire_time, t_now;
- uint64_t ns_elapsed;
- int uframes, skipped_uframes;
- int i;
-
- t_now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
- ns_elapsed = t_now - ehci->last_run_ns;
- uframes = ns_elapsed / UFRAME_TIMER_NS;
-
- if (ehci_periodic_enabled(ehci) || ehci->pstate != EST_INACTIVE) {
- need_timer++;
-
- if (uframes > (ehci->maxframes * 8)) {
- skipped_uframes = uframes - (ehci->maxframes * 8);
- ehci_update_frindex(ehci, skipped_uframes);
- ehci->last_run_ns += UFRAME_TIMER_NS * skipped_uframes;
- uframes -= skipped_uframes;
- DPRINTF("WARNING - EHCI skipped %d uframes\n", skipped_uframes);
- }
-
- for (i = 0; i < uframes; i++) {
- /*
- * If we're running behind schedule, we should not catch up
- * too fast, as that will make some guests unhappy:
- * 1) We must process a minimum of MIN_UFR_PER_TICK frames,
- * otherwise we will never catch up
- * 2) Process frames until the guest has requested an irq (IOC)
- */
- if (i >= MIN_UFR_PER_TICK) {
- ehci_commit_irq(ehci);
- if ((ehci->usbsts & USBINTR_MASK) & ehci->usbintr) {
- break;
- }
- }
- if (ehci->periodic_sched_active) {
- ehci->periodic_sched_active--;
- }
- ehci_update_frindex(ehci, 1);
- if ((ehci->frindex & 7) == 0) {
- ehci_advance_periodic_state(ehci);
- }
- ehci->last_run_ns += UFRAME_TIMER_NS;
- }
- } else {
- ehci->periodic_sched_active = 0;
- ehci_update_frindex(ehci, uframes);
- ehci->last_run_ns += UFRAME_TIMER_NS * uframes;
- }
-
- if (ehci->periodic_sched_active) {
- ehci->async_stepdown = 0;
- } else if (ehci->async_stepdown < ehci->maxframes / 2) {
- ehci->async_stepdown++;
- }
-
- /* Async is not inside loop since it executes everything it can once
- * called
- */
- if (ehci_async_enabled(ehci) || ehci->astate != EST_INACTIVE) {
- need_timer++;
- ehci_advance_async_state(ehci);
- }
-
- ehci_commit_irq(ehci);
- if (ehci->usbsts_pending) {
- need_timer++;
- ehci->async_stepdown = 0;
- }
-
- if (ehci_enabled(ehci) && (ehci->usbintr & USBSTS_FLR)) {
- need_timer++;
- }
-
- if (need_timer) {
- /* If we've raised int, we speed up the timer, so that we quickly
- * notice any new packets queued up in response */
- if (ehci->int_req_by_async && (ehci->usbsts & USBSTS_INT)) {
- expire_time = t_now +
- NANOSECONDS_PER_SECOND / (FRAME_TIMER_FREQ * 4);
- ehci->int_req_by_async = false;
- } else {
- expire_time = t_now + (NANOSECONDS_PER_SECOND
- * (ehci->async_stepdown+1) / FRAME_TIMER_FREQ);
- }
- timer_mod(ehci->frame_timer, expire_time);
- }
-}
-
-static const MemoryRegionOps ehci_mmio_caps_ops = {
- .read = ehci_caps_read,
- .write = ehci_caps_write,
- .valid.min_access_size = 1,
- .valid.max_access_size = 4,
- .impl.min_access_size = 1,
- .impl.max_access_size = 1,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-static const MemoryRegionOps ehci_mmio_opreg_ops = {
- .read = ehci_opreg_read,
- .write = ehci_opreg_write,
- .valid.min_access_size = 4,
- .valid.max_access_size = 4,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-static const MemoryRegionOps ehci_mmio_port_ops = {
- .read = ehci_port_read,
- .write = ehci_port_write,
- .valid.min_access_size = 4,
- .valid.max_access_size = 4,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-static USBPortOps ehci_port_ops = {
- .attach = ehci_attach,
- .detach = ehci_detach,
- .child_detach = ehci_child_detach,
- .wakeup = ehci_wakeup,
- .complete = ehci_async_complete_packet,
-};
-
-static USBBusOps ehci_bus_ops_companion = {
- .register_companion = ehci_register_companion,
- .wakeup_endpoint = ehci_wakeup_endpoint,
-};
-static USBBusOps ehci_bus_ops_standalone = {
- .wakeup_endpoint = ehci_wakeup_endpoint,
-};
-
-static void usb_ehci_pre_save(void *opaque)
-{
- EHCIState *ehci = opaque;
- uint32_t new_frindex;
-
- /* Round down frindex to a multiple of 8 for migration compatibility */
- new_frindex = ehci->frindex & ~7;
- ehci->last_run_ns -= (ehci->frindex - new_frindex) * UFRAME_TIMER_NS;
- ehci->frindex = new_frindex;
-}
-
-static int usb_ehci_post_load(void *opaque, int version_id)
-{
- EHCIState *s = opaque;
- int i;
-
- for (i = 0; i < NB_PORTS; i++) {
- USBPort *companion = s->companion_ports[i];
- if (companion == NULL) {
- continue;
- }
- if (s->portsc[i] & PORTSC_POWNER) {
- companion->dev = s->ports[i].dev;
- } else {
- companion->dev = NULL;
- }
- }
-
- return 0;
-}
-
-static void usb_ehci_vm_state_change(void *opaque, int running, RunState state)
-{
- EHCIState *ehci = opaque;
-
- /*
- * We don't migrate the EHCIQueue-s, instead we rebuild them for the
- * schedule in guest memory. We must do the rebuilt ASAP, so that
- * USB-devices which have async handled packages have a packet in the
- * ep queue to match the completion with.
- */
- if (state == RUN_STATE_RUNNING) {
- ehci_advance_async_state(ehci);
- }
-
- /*
- * The schedule rebuilt from guest memory could cause the migration dest
- * to miss a QH unlink, and fail to cancel packets, since the unlinked QH
- * will never have existed on the destination. Therefor we must flush the
- * async schedule on savevm to catch any not yet noticed unlinks.
- */
- if (state == RUN_STATE_SAVE_VM) {
- ehci_advance_async_state(ehci);
- ehci_queues_rip_unseen(ehci, 1);
- }
-}
-
-const VMStateDescription vmstate_ehci = {
- .name = "ehci-core",
- .version_id = 2,
- .minimum_version_id = 1,
- .pre_save = usb_ehci_pre_save,
- .post_load = usb_ehci_post_load,
- .fields = (VMStateField[]) {
- /* mmio registers */
- VMSTATE_UINT32(usbcmd, EHCIState),
- VMSTATE_UINT32(usbsts, EHCIState),
- VMSTATE_UINT32_V(usbsts_pending, EHCIState, 2),
- VMSTATE_UINT32_V(usbsts_frindex, EHCIState, 2),
- VMSTATE_UINT32(usbintr, EHCIState),
- VMSTATE_UINT32(frindex, EHCIState),
- VMSTATE_UINT32(ctrldssegment, EHCIState),
- VMSTATE_UINT32(periodiclistbase, EHCIState),
- VMSTATE_UINT32(asynclistaddr, EHCIState),
- VMSTATE_UINT32(configflag, EHCIState),
- VMSTATE_UINT32(portsc[0], EHCIState),
- VMSTATE_UINT32(portsc[1], EHCIState),
- VMSTATE_UINT32(portsc[2], EHCIState),
- VMSTATE_UINT32(portsc[3], EHCIState),
- VMSTATE_UINT32(portsc[4], EHCIState),
- VMSTATE_UINT32(portsc[5], EHCIState),
- /* frame timer */
- VMSTATE_TIMER_PTR(frame_timer, EHCIState),
- VMSTATE_UINT64(last_run_ns, EHCIState),
- VMSTATE_UINT32(async_stepdown, EHCIState),
- /* schedule state */
- VMSTATE_UINT32(astate, EHCIState),
- VMSTATE_UINT32(pstate, EHCIState),
- VMSTATE_UINT32(a_fetch_addr, EHCIState),
- VMSTATE_UINT32(p_fetch_addr, EHCIState),
- VMSTATE_END_OF_LIST()
- }
-};
-
-void usb_ehci_realize(EHCIState *s, DeviceState *dev, Error **errp)
-{
- int i;
-
- if (s->portnr > NB_PORTS) {
- error_setg(errp, "Too many ports! Max. port number is %d.",
- NB_PORTS);
- return;
- }
-
- usb_bus_new(&s->bus, sizeof(s->bus), s->companion_enable ?
- &ehci_bus_ops_companion : &ehci_bus_ops_standalone, dev);
- for (i = 0; i < s->portnr; i++) {
- usb_register_port(&s->bus, &s->ports[i], s, i, &ehci_port_ops,
- USB_SPEED_MASK_HIGH);
- s->ports[i].dev = 0;
- }
-
- s->frame_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, ehci_frame_timer, s);
- s->async_bh = qemu_bh_new(ehci_frame_timer, s);
- s->device = dev;
-
- s->vmstate = qemu_add_vm_change_state_handler(usb_ehci_vm_state_change, s);
-}
-
-void usb_ehci_unrealize(EHCIState *s, DeviceState *dev, Error **errp)
-{
- trace_usb_ehci_unrealize();
-
- if (s->frame_timer) {
- timer_del(s->frame_timer);
- timer_free(s->frame_timer);
- s->frame_timer = NULL;
- }
- if (s->async_bh) {
- qemu_bh_delete(s->async_bh);
- }
-
- ehci_queues_rip_all(s, 0);
- ehci_queues_rip_all(s, 1);
-
- memory_region_del_subregion(&s->mem, &s->mem_caps);
- memory_region_del_subregion(&s->mem, &s->mem_opreg);
- memory_region_del_subregion(&s->mem, &s->mem_ports);
-
- usb_bus_release(&s->bus);
-
- if (s->vmstate) {
- qemu_del_vm_change_state_handler(s->vmstate);
- }
-}
-
-void usb_ehci_init(EHCIState *s, DeviceState *dev)
-{
- /* 2.2 host controller interface version */
- s->caps[0x00] = (uint8_t)(s->opregbase - s->capsbase);
- s->caps[0x01] = 0x00;
- s->caps[0x02] = 0x00;
- s->caps[0x03] = 0x01; /* HC version */
- s->caps[0x04] = s->portnr; /* Number of downstream ports */
- s->caps[0x05] = 0x00; /* No companion ports at present */
- s->caps[0x06] = 0x00;
- s->caps[0x07] = 0x00;
- s->caps[0x08] = 0x80; /* We can cache whole frame, no 64-bit */
- s->caps[0x0a] = 0x00;
- s->caps[0x0b] = 0x00;
-
- QTAILQ_INIT(&s->aqueues);
- QTAILQ_INIT(&s->pqueues);
- usb_packet_init(&s->ipacket);
-
- memory_region_init(&s->mem, OBJECT(dev), "ehci", MMIO_SIZE);
- memory_region_init_io(&s->mem_caps, OBJECT(dev), &ehci_mmio_caps_ops, s,
- "capabilities", CAPA_SIZE);
- memory_region_init_io(&s->mem_opreg, OBJECT(dev), &ehci_mmio_opreg_ops, s,
- "operational", s->portscbase);
- memory_region_init_io(&s->mem_ports, OBJECT(dev), &ehci_mmio_port_ops, s,
- "ports", 4 * s->portnr);
-
- memory_region_add_subregion(&s->mem, s->capsbase, &s->mem_caps);
- memory_region_add_subregion(&s->mem, s->opregbase, &s->mem_opreg);
- memory_region_add_subregion(&s->mem, s->opregbase + s->portscbase,
- &s->mem_ports);
-}
-
-/*
- * vim: expandtab ts=4
- */