diff options
Diffstat (limited to 'qemu/hw/usb/hcd-ehci.c')
| -rw-r--r-- | qemu/hw/usb/hcd-ehci.c | 2549 |
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 - */ |