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usb/ohci: Don't use packet from OHCIState for isochronous transfers

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Since isochronous transfers cannot be handled async (the function
returns error in that case) we don't need to remember the packet.
Avoid using the usb_packet field in OHCIState (as that can be a
waiting async packet on another endpoint) and allocate and use a local
USBPacket for the iso transfer instead. After this we don't have to
care if we're called from a completion callback or not so we can drop
that parameter as well.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Message-Id: <bf523d40f8088a84383cb00ffd2e6e82fa47790d.1643117600.git.balaton@eik.bme.hu>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
BALATON Zoltan 2022-01-25 14:33:20 +01:00 committed by Gerd Hoffmann
parent b6b0c066f5
commit 3a4d06f26f
1 changed files with 38 additions and 33 deletions
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71
hw/usb/hcd-ohci.c
View file

@ -548,8 +548,7 @@ static int ohci_copy_iso_td(OHCIState *ohci,
#define USUB(a, b) ((int16_t)((uint16_t)(a) - (uint16_t)(b)))
static int ohci_service_iso_td(OHCIState *ohci, struct ohci_ed *ed,
int completion)
static int ohci_service_iso_td(OHCIState *ohci, struct ohci_ed *ed)
{
int dir;
size_t len = 0;
@ -559,6 +558,9 @@ static int ohci_service_iso_td(OHCIState *ohci, struct ohci_ed *ed,
int i;
USBDevice *dev;
USBEndpoint *ep;
USBPacket *pkt;
uint8_t buf[8192];
bool int_req;
struct ohci_iso_td iso_td;
uint32_t addr;
uint16_t starting_frame;
@ -693,40 +695,42 @@ static int ohci_service_iso_td(OHCIState *ohci, struct ohci_ed *ed,
} else {
len = end_addr - start_addr + 1;
}
if (len > sizeof(ohci->usb_buf)) {
len = sizeof(ohci->usb_buf);
if (len > sizeof(buf)) {
len = sizeof(buf);
}
if (len && dir != OHCI_TD_DIR_IN) {
if (ohci_copy_iso_td(ohci, start_addr, end_addr, ohci->usb_buf, len,
if (ohci_copy_iso_td(ohci, start_addr, end_addr, buf, len,
DMA_DIRECTION_TO_DEVICE)) {
ohci_die(ohci);
return 1;
}
}
if (!completion) {
bool int_req = relative_frame_number == frame_count &&
OHCI_BM(iso_td.flags, TD_DI) == 0;
dev = ohci_find_device(ohci, OHCI_BM(ed->flags, ED_FA));
if (dev == NULL) {
trace_usb_ohci_td_dev_error();
return 1;
}
ep = usb_ep_get(dev, pid, OHCI_BM(ed->flags, ED_EN));
usb_packet_setup(&ohci->usb_packet, pid, ep, 0, addr, false, int_req);
usb_packet_addbuf(&ohci->usb_packet, ohci->usb_buf, len);
usb_handle_packet(dev, &ohci->usb_packet);
if (ohci->usb_packet.status == USB_RET_ASYNC) {
usb_device_flush_ep_queue(dev, ep);
return 1;
}
dev = ohci_find_device(ohci, OHCI_BM(ed->flags, ED_FA));
if (dev == NULL) {
trace_usb_ohci_td_dev_error();
return 1;
}
if (ohci->usb_packet.status == USB_RET_SUCCESS) {
ret = ohci->usb_packet.actual_length;
ep = usb_ep_get(dev, pid, OHCI_BM(ed->flags, ED_EN));
pkt = g_new0(USBPacket, 1);
usb_packet_init(pkt);
int_req = relative_frame_number == frame_count &&
OHCI_BM(iso_td.flags, TD_DI) == 0;
usb_packet_setup(pkt, pid, ep, 0, addr, false, int_req);
usb_packet_addbuf(pkt, buf, len);
usb_handle_packet(dev, pkt);
if (pkt->status == USB_RET_ASYNC) {
usb_device_flush_ep_queue(dev, ep);
g_free(pkt);
return 1;
}
if (pkt->status == USB_RET_SUCCESS) {
ret = pkt->actual_length;
} else {
ret = ohci->usb_packet.status;
ret = pkt->status;
}
g_free(pkt);
trace_usb_ohci_iso_td_so(start_offset, end_offset, start_addr, end_addr,
str, len, ret);
@ -734,7 +738,7 @@ static int ohci_service_iso_td(OHCIState *ohci, struct ohci_ed *ed,
/* Writeback */
if (dir == OHCI_TD_DIR_IN && ret >= 0 && ret <= len) {
/* IN transfer succeeded */
if (ohci_copy_iso_td(ohci, start_addr, end_addr, ohci->usb_buf, ret,
if (ohci_copy_iso_td(ohci, start_addr, end_addr, buf, ret,
DMA_DIRECTION_FROM_DEVICE)) {
ohci_die(ohci);
return 1;
@ -1057,7 +1061,7 @@ exit_no_retire:
}
/* Service an endpoint list. Returns nonzero if active TD were found. */
static int ohci_service_ed_list(OHCIState *ohci, uint32_t head, int completion)
static int ohci_service_ed_list(OHCIState *ohci, uint32_t head)
{
struct ohci_ed ed;
uint32_t next_ed;
@ -1108,8 +1112,9 @@ static int ohci_service_ed_list(OHCIState *ohci, uint32_t head, int completion)
break;
} else {
/* Handle isochronous endpoints */
if (ohci_service_iso_td(ohci, &ed, completion))
if (ohci_service_iso_td(ohci, &ed)) {
break;
}
}
}
@ -1136,20 +1141,20 @@ static void ohci_sof(OHCIState *ohci)
}
/* Process Control and Bulk lists. */
static void ohci_process_lists(OHCIState *ohci, int completion)
static void ohci_process_lists(OHCIState *ohci)
{
if ((ohci->ctl & OHCI_CTL_CLE) && (ohci->status & OHCI_STATUS_CLF)) {
if (ohci->ctrl_cur && ohci->ctrl_cur != ohci->ctrl_head) {
trace_usb_ohci_process_lists(ohci->ctrl_head, ohci->ctrl_cur);
}
if (!ohci_service_ed_list(ohci, ohci->ctrl_head, completion)) {
if (!ohci_service_ed_list(ohci, ohci->ctrl_head)) {
ohci->ctrl_cur = 0;
ohci->status &= ~OHCI_STATUS_CLF;
}
}
if ((ohci->ctl & OHCI_CTL_BLE) && (ohci->status & OHCI_STATUS_BLF)) {
if (!ohci_service_ed_list(ohci, ohci->bulk_head, completion)) {
if (!ohci_service_ed_list(ohci, ohci->bulk_head)) {
ohci->bulk_cur = 0;
ohci->status &= ~OHCI_STATUS_BLF;
}
@ -1173,7 +1178,7 @@ static void ohci_frame_boundary(void *opaque)
int n;
n = ohci->frame_number & 0x1f;
ohci_service_ed_list(ohci, le32_to_cpu(hcca.intr[n]), 0);
ohci_service_ed_list(ohci, le32_to_cpu(hcca.intr[n]));
}
/* Cancel all pending packets if either of the lists has been disabled. */
@ -1181,7 +1186,7 @@ static void ohci_frame_boundary(void *opaque)
ohci_stop_endpoints(ohci);
}
ohci->old_ctl = ohci->ctl;
ohci_process_lists(ohci, 0);
ohci_process_lists(ohci);
/* Stop if UnrecoverableError happened or ohci_sof will crash */
if (ohci->intr_status & OHCI_INTR_UE) {
@ -1794,7 +1799,7 @@ static void ohci_async_complete_packet(USBPort *port, USBPacket *packet)
trace_usb_ohci_async_complete();
ohci->async_complete = true;
ohci_process_lists(ohci, 1);
ohci_process_lists(ohci);
}
static USBPortOps ohci_port_ops = {