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usb-linux: make iso urb count contigurable 

Add a qdev property for the number of iso urbs which
usb-linux keeps in flight, so it can be configured at
runtime.  Make it default to four (old hardcoded value
used to be three).

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2011-06-10 14:03:56 +02:00
parent ca3a36cf2b
commit b81bcd8aa0
1 changed files with 8 additions and 7 deletions
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15
usb-linux.c
View File

@ -85,7 +85,6 @@ static int usb_fs_type;
/* endpoint association data */
#define ISO_FRAME_DESC_PER_URB 32
#define ISO_URB_COUNT 3
#define INVALID_EP_TYPE 255
/* devio.c limits single requests to 16k */
@ -120,6 +119,7 @@ typedef struct USBHostDevice {
int configuration;
int ninterfaces;
int closing;
uint32_t iso_urb_count;
Notifier exit;
struct endp_data endp_table[MAX_ENDPOINTS];
@ -505,8 +505,8 @@ static AsyncURB *usb_host_alloc_iso(USBHostDevice *s, uint8_t ep, int in)
AsyncURB *aurb;
int i, j, len = get_max_packet_size(s, ep);
aurb = qemu_mallocz(ISO_URB_COUNT * sizeof(*aurb));
for (i = 0; i < ISO_URB_COUNT; i++) {
aurb = qemu_mallocz(s->iso_urb_count * sizeof(*aurb));
for (i = 0; i < s->iso_urb_count; i++) {
aurb[i].urb.endpoint = ep;
aurb[i].urb.buffer_length = ISO_FRAME_DESC_PER_URB * len;
aurb[i].urb.buffer = qemu_malloc(aurb[i].urb.buffer_length);
@ -536,7 +536,7 @@ static void usb_host_stop_n_free_iso(USBHostDevice *s, uint8_t ep)
return;
}
for (i = 0; i < ISO_URB_COUNT; i++) {
for (i = 0; i < s->iso_urb_count; i++) {
/* in flight? */
if (aurb[i].iso_frame_idx == -1) {
ret = ioctl(s->fd, USBDEVFS_DISCARDURB, &aurb[i]);
@ -554,7 +554,7 @@ static void usb_host_stop_n_free_iso(USBHostDevice *s, uint8_t ep)
async_complete(s);
}
for (i = 0; i < ISO_URB_COUNT; i++) {
for (i = 0; i < s->iso_urb_count; i++) {
qemu_free(aurb[i].urb.buffer);
}
@ -639,7 +639,7 @@ static int usb_host_handle_iso_data(USBHostDevice *s, USBPacket *p, int in)
}
aurb[i].iso_frame_idx++;
if (aurb[i].iso_frame_idx == ISO_FRAME_DESC_PER_URB) {
i = (i + 1) % ISO_URB_COUNT;
i = (i + 1) % s->iso_urb_count;
set_iso_urb_idx(s, p->devep, i);
}
} else {
@ -652,7 +652,7 @@ static int usb_host_handle_iso_data(USBHostDevice *s, USBPacket *p, int in)
if (is_iso_started(s, p->devep)) {
/* (Re)-submit all fully consumed / filled urbs */
for (i = 0; i < ISO_URB_COUNT; i++) {
for (i = 0; i < s->iso_urb_count; i++) {
if (aurb[i].iso_frame_idx == ISO_FRAME_DESC_PER_URB) {
ret = ioctl(s->fd, USBDEVFS_SUBMITURB, &aurb[i]);
if (ret < 0) {
@ -1233,6 +1233,7 @@ static struct USBDeviceInfo usb_host_dev_info = {
DEFINE_PROP_STRING("hostport", USBHostDevice, match.port),
DEFINE_PROP_HEX32("vendorid", USBHostDevice, match.vendor_id, 0),
DEFINE_PROP_HEX32("productid", USBHostDevice, match.product_id, 0),
DEFINE_PROP_UINT32("isobufs", USBHostDevice, iso_urb_count, 4),
DEFINE_PROP_END_OF_LIST(),
},
};