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xhci: iso xfer support 

Add support for iso transfers.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2012-08-24 14:13:08 +02:00
parent 01546fa662
commit 3d1396842d
1 changed files with 101 additions and 16 deletions
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117
hw/usb/hcd-xhci.c
View File

@ -325,9 +325,15 @@ typedef struct XHCITransfer {
unsigned int pkts;
unsigned int pktsize;
unsigned int cur_pkt;
uint64_t mfindex_kick;
} XHCITransfer;
typedef struct XHCIEPContext {
XHCIState *xhci;
unsigned int slotid;
unsigned int epid;
XHCIRing ring;
unsigned int next_xfer;
unsigned int comp_xfer;
@ -337,6 +343,11 @@ typedef struct XHCIEPContext {
dma_addr_t pctx;
unsigned int max_psize;
uint32_t state;
/* iso xfer scheduling */
unsigned int interval;
int64_t mfindex_last;
QEMUTimer *kick_timer;
} XHCIEPContext;
typedef struct XHCISlot {
@ -856,6 +867,12 @@ static void xhci_set_ep_state(XHCIState *xhci, XHCIEPContext *epctx,
epctx->state = state;
}
static void xhci_ep_kick_timer(void *opaque)
{
XHCIEPContext *epctx = opaque;
xhci_kick_ep(epctx->xhci, epctx->slotid, epctx->epid);
}
static TRBCCode xhci_enable_ep(XHCIState *xhci, unsigned int slotid,
unsigned int epid, dma_addr_t pctx,
uint32_t *ctx)
@ -877,6 +894,9 @@ static TRBCCode xhci_enable_ep(XHCIState *xhci, unsigned int slotid,
epctx = g_malloc(sizeof(XHCIEPContext));
memset(epctx, 0, sizeof(XHCIEPContext));
epctx->xhci = xhci;
epctx->slotid = slotid;
epctx->epid = epid;
slot->eps[epid-1] = epctx;
@ -895,6 +915,10 @@ static TRBCCode xhci_enable_ep(XHCIState *xhci, unsigned int slotid,
usb_packet_init(&epctx->transfers[i].packet);
}
epctx->interval = 1 << (ctx[0] >> 16) & 0xff;
epctx->mfindex_last = 0;
epctx->kick_timer = qemu_new_timer_ns(vm_clock, xhci_ep_kick_timer, epctx);
epctx->state = EP_RUNNING;
ctx[0] &= ~EP_STATE_MASK;
ctx[0] |= EP_RUNNING;
@ -934,6 +958,7 @@ static int xhci_ep_nuke_xfers(XHCIState *xhci, unsigned int slotid,
if (t->running_retry) {
t->running_retry = 0;
epctx->retry = NULL;
qemu_del_timer(epctx->kick_timer);
}
if (t->trbs) {
g_free(t->trbs);
@ -969,6 +994,7 @@ static TRBCCode xhci_disable_ep(XHCIState *xhci, unsigned int slotid,
xhci_set_ep_state(xhci, epctx, EP_DISABLED);
qemu_free_timer(epctx->kick_timer);
g_free(epctx);
slot->eps[epid-1] = NULL;
@ -1376,29 +1402,70 @@ static int xhci_fire_ctl_transfer(XHCIState *xhci, XHCITransfer *xfer)
return 0;
}
static void xhci_calc_iso_kick(XHCIState *xhci, XHCITransfer *xfer,
XHCIEPContext *epctx, uint64_t mfindex)
{
if (xfer->trbs[0].control & TRB_TR_SIA) {
uint64_t asap = ((mfindex + epctx->interval - 1) &
~(epctx->interval-1));
if (asap >= epctx->mfindex_last &&
asap <= epctx->mfindex_last + epctx->interval * 4) {
xfer->mfindex_kick = epctx->mfindex_last + epctx->interval;
} else {
xfer->mfindex_kick = asap;
}
} else {
xfer->mfindex_kick = (xfer->trbs[0].control >> TRB_TR_FRAMEID_SHIFT)
& TRB_TR_FRAMEID_MASK;
xfer->mfindex_kick |= mfindex & ~0x3fff;
if (xfer->mfindex_kick < mfindex) {
xfer->mfindex_kick += 0x4000;
}
}
}
static void xhci_check_iso_kick(XHCIState *xhci, XHCITransfer *xfer,
XHCIEPContext *epctx, uint64_t mfindex)
{
if (xfer->mfindex_kick > mfindex) {
qemu_mod_timer(epctx->kick_timer, qemu_get_clock_ns(vm_clock) +
(xfer->mfindex_kick - mfindex) * 125000);
xfer->running_retry = 1;
} else {
epctx->mfindex_last = xfer->mfindex_kick;
qemu_del_timer(epctx->kick_timer);
xfer->running_retry = 0;
}
}
static int xhci_submit(XHCIState *xhci, XHCITransfer *xfer, XHCIEPContext *epctx)
{
uint64_t mfindex;
int ret;
DPRINTF("xhci_submit(slotid=%d,epid=%d)\n", xfer->slotid, xfer->epid);
xfer->in_xfer = epctx->type>>2;
if (epctx->type == ET_ISO_IN || epctx->type == ET_ISO_OUT) {
xfer->pkts = 1;
} else {
xfer->pkts = 0;
}
switch(epctx->type) {
case ET_INTR_OUT:
case ET_INTR_IN:
case ET_BULK_OUT:
case ET_BULK_IN:
xfer->pkts = 0;
xfer->iso_xfer = false;
break;
case ET_ISO_OUT:
case ET_ISO_IN:
FIXME();
xfer->pkts = 1;
xfer->iso_xfer = true;
mfindex = xhci_mfindex_get(xhci);
xhci_calc_iso_kick(xhci, xfer, epctx, mfindex);
xhci_check_iso_kick(xhci, xfer, epctx, mfindex);
if (xfer->running_retry) {
return -1;
}
break;
default:
fprintf(stderr, "xhci: unknown or unhandled EP "
@ -1428,6 +1495,7 @@ static int xhci_fire_transfer(XHCIState *xhci, XHCITransfer *xfer, XHCIEPContext
static void xhci_kick_ep(XHCIState *xhci, unsigned int slotid, unsigned int epid)
{
XHCIEPContext *epctx;
uint64_t mfindex;
int length;
int i;
@ -1447,20 +1515,35 @@ static void xhci_kick_ep(XHCIState *xhci, unsigned int slotid, unsigned int epid
}
if (epctx->retry) {
/* retry nak'ed transfer */
XHCITransfer *xfer = epctx->retry;
int result;
trace_usb_xhci_xfer_retry(xfer);
assert(xfer->running_retry);
if (xhci_setup_packet(xfer) < 0) {
return;
if (xfer->iso_xfer) {
/* retry delayed iso transfer */
mfindex = xhci_mfindex_get(xhci);
xhci_check_iso_kick(xhci, xfer, epctx, mfindex);
if (xfer->running_retry) {
return;
}
if (xhci_setup_packet(xfer) < 0) {
return;
}
result = usb_handle_packet(xfer->packet.ep->dev, &xfer->packet);
assert(result != USB_RET_NAK);
xhci_complete_packet(xfer, result);
} else {
/* retry nak'ed transfer */
if (xhci_setup_packet(xfer) < 0) {
return;
}
result = usb_handle_packet(xfer->packet.ep->dev, &xfer->packet);
if (result == USB_RET_NAK) {
return;
}
xhci_complete_packet(xfer, result);
}
result = usb_handle_packet(xfer->packet.ep->dev, &xfer->packet);
if (result == USB_RET_NAK) {
return;
}
xhci_complete_packet(xfer, result);
assert(!xfer->running_retry);
epctx->retry = NULL;
}
@ -1512,7 +1595,9 @@ static void xhci_kick_ep(XHCIState *xhci, unsigned int slotid, unsigned int epid
if (xhci_fire_transfer(xhci, xfer, epctx) >= 0) {
epctx->next_xfer = (epctx->next_xfer + 1) % TD_QUEUE;
} else {
fprintf(stderr, "xhci: error firing data transfer\n");
if (!xfer->iso_xfer) {
fprintf(stderr, "xhci: error firing data transfer\n");
}
}
}