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[Qemu-devel] [PATCH 3/7] usb: add pipelining option to usb endpoints
From: |
Gerd Hoffmann |
Subject: |
[Qemu-devel] [PATCH 3/7] usb: add pipelining option to usb endpoints |
Date: |
Fri, 2 Mar 2012 14:19:26 +0100 |
With this patch applied USB drivers can enable pipelining per endpoint.
With pipelining enabled the usb core will continue submitting packets
even when there are still async transfers in flight instead of passing
them on one by one.
Signed-off-by: Gerd Hoffmann <address@hidden>
---
hw/usb.c | 11 ++++++++++-
hw/usb.h | 2 ++
2 files changed, 12 insertions(+), 1 deletions(-)
diff --git a/hw/usb.c b/hw/usb.c
index fc41d62..800d912 100644
--- a/hw/usb.c
+++ b/hw/usb.c
@@ -323,7 +323,7 @@ int usb_handle_packet(USBDevice *dev, USBPacket *p)
assert(p->state == USB_PACKET_SETUP);
assert(p->ep != NULL);
- if (QTAILQ_EMPTY(&p->ep->queue)) {
+ if (QTAILQ_EMPTY(&p->ep->queue) || p->ep->pipeline) {
ret = usb_process_one(p);
if (ret == USB_RET_ASYNC) {
usb_packet_set_state(p, USB_PACKET_ASYNC);
@@ -468,6 +468,7 @@ void usb_ep_init(USBDevice *dev)
dev->ep_ctl.type = USB_ENDPOINT_XFER_CONTROL;
dev->ep_ctl.ifnum = 0;
dev->ep_ctl.dev = dev;
+ dev->ep_ctl.pipeline = false;
QTAILQ_INIT(&dev->ep_ctl.queue);
for (ep = 0; ep < USB_MAX_ENDPOINTS; ep++) {
dev->ep_in[ep].nr = ep + 1;
@@ -480,6 +481,8 @@ void usb_ep_init(USBDevice *dev)
dev->ep_out[ep].ifnum = 0;
dev->ep_in[ep].dev = dev;
dev->ep_out[ep].dev = dev;
+ dev->ep_in[ep].pipeline = false;
+ dev->ep_out[ep].pipeline = false;
QTAILQ_INIT(&dev->ep_in[ep].queue);
QTAILQ_INIT(&dev->ep_out[ep].queue);
}
@@ -593,3 +596,9 @@ int usb_ep_get_max_packet_size(USBDevice *dev, int pid, int
ep)
struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
return uep->max_packet_size;
}
+
+void usb_ep_set_pipeline(USBDevice *dev, int pid, int ep, bool enabled)
+{
+ struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
+ uep->pipeline = enabled;
+}
diff --git a/hw/usb.h b/hw/usb.h
index 8e83697..5bcc9b5 100644
--- a/hw/usb.h
+++ b/hw/usb.h
@@ -176,6 +176,7 @@ struct USBEndpoint {
uint8_t type;
uint8_t ifnum;
int max_packet_size;
+ bool pipeline;
USBDevice *dev;
QTAILQ_HEAD(, USBPacket) queue;
};
@@ -363,6 +364,7 @@ void usb_ep_set_ifnum(USBDevice *dev, int pid, int ep,
uint8_t ifnum);
void usb_ep_set_max_packet_size(USBDevice *dev, int pid, int ep,
uint16_t raw);
int usb_ep_get_max_packet_size(USBDevice *dev, int pid, int ep);
+void usb_ep_set_pipeline(USBDevice *dev, int pid, int ep, bool enabled);
void usb_attach(USBPort *port);
void usb_detach(USBPort *port);
--
1.7.1
- [Qemu-devel] [PATCH 0/7] usb: packet pipelining, Gerd Hoffmann, 2012/03/02
- [Qemu-devel] [PATCH 4/7] usb-host: enable pipelineing for bulk endpoints., Gerd Hoffmann, 2012/03/02
- [Qemu-devel] [PATCH 1/7] uhci_fill_queue: zap debug printf, Gerd Hoffmann, 2012/03/02
- [Qemu-devel] [PATCH 2/7] usb: queue can have async packets, Gerd Hoffmann, 2012/03/02
- [Qemu-devel] [PATCH 7/7] xhci: fix port status, Gerd Hoffmann, 2012/03/02
- [Qemu-devel] [PATCH 3/7] usb: add pipelining option to usb endpoints,
Gerd Hoffmann <=
- [Qemu-devel] [PATCH 6/7] xhci: fix control xfers, Gerd Hoffmann, 2012/03/02
- [Qemu-devel] [PATCH 5/7] usb: add shortcut for control transfers, Gerd Hoffmann, 2012/03/02