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USB: add urb->ep
This patch (as943) prepares the way for eliminating urb->pipe by introducing an endpoint pointer into struct urb. For now urb->ep is set by usb_submit_urb() from the pipe value; eventually drivers will set it themselves and we will remove urb->pipe completely. The patch also adds new inline routines to retrieve an endpoint descriptor's number and transfer type, essentially as replacements for usb_pipeendpoint and usb_pipetype. usb_submit_urb(), usb_hcd_submit_urb(), and usb_hcd_unlink_urb() are converted to use the new field and new routines. Other parts of usbcore will be converted in later patches. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern
Greg Kroah-Hartman
parent
a96173af52
commit
5b653c79c0
@ -962,14 +962,14 @@ int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags)
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spin_lock_irqsave(&hcd_urb_list_lock, flags);
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ep = (usb_pipein(urb->pipe) ? urb->dev->ep_in : urb->dev->ep_out)
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[usb_pipeendpoint(urb->pipe)];
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if (unlikely (!ep))
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if (unlikely(ep != urb->ep))
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status = -ENOENT;
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else if (unlikely (urb->reject))
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status = -EPERM;
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else switch (hcd->state) {
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case HC_STATE_RUNNING:
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case HC_STATE_RESUMING:
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list_add_tail (&urb->urb_list, &ep->urb_list);
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list_add_tail (&urb->urb_list, &urb->ep->urb_list);
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status = 0;
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break;
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default:
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@ -1022,7 +1022,7 @@ int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags)
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: DMA_TO_DEVICE);
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}
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status = hcd->driver->urb_enqueue (hcd, ep, urb, mem_flags);
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status = hcd->driver->urb_enqueue (hcd, urb->ep, urb, mem_flags);
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done:
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if (unlikely (status)) {
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urb_unlink(hcd, urb);
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@ -1071,7 +1071,6 @@ unlink1 (struct usb_hcd *hcd, struct urb *urb)
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*/
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int usb_hcd_unlink_urb (struct urb *urb, int status)
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{
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struct usb_host_endpoint *ep;
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struct usb_hcd *hcd = NULL;
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struct device *sys = NULL;
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unsigned long flags;
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@ -1082,10 +1081,6 @@ int usb_hcd_unlink_urb (struct urb *urb, int status)
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return -EINVAL;
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if (!urb->dev || !urb->dev->bus)
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return -ENODEV;
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ep = (usb_pipein(urb->pipe) ? urb->dev->ep_in : urb->dev->ep_out)
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[usb_pipeendpoint(urb->pipe)];
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if (!ep)
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return -ENODEV;
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/*
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* we contend for urb->status with the hcd core,
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@ -1109,7 +1104,7 @@ int usb_hcd_unlink_urb (struct urb *urb, int status)
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}
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/* insist the urb is still queued */
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list_for_each(tmp, &ep->urb_list) {
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list_for_each(tmp, &urb->ep->urb_list) {
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if (tmp == &urb->urb_list)
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break;
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}
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@ -277,9 +277,10 @@ EXPORT_SYMBOL_GPL(usb_unanchor_urb);
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*/
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int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
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{
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int pipe, temp, max;
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struct usb_device *dev;
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int is_out;
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int xfertype, max;
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struct usb_device *dev;
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struct usb_host_endpoint *ep;
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int is_out;
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if (!urb || urb->hcpriv || !urb->complete)
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return -EINVAL;
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@ -291,30 +292,34 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
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|| dev->state == USB_STATE_SUSPENDED)
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return -EHOSTUNREACH;
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/* For now, get the endpoint from the pipe. Eventually drivers
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* will be required to set urb->ep directly and we will eliminate
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* urb->pipe.
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*/
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ep = (usb_pipein(urb->pipe) ? dev->ep_in : dev->ep_out)
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[usb_pipeendpoint(urb->pipe)];
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if (!ep)
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return -ENOENT;
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urb->ep = ep;
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urb->status = -EINPROGRESS;
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urb->actual_length = 0;
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/* Lots of sanity checks, so HCDs can rely on clean data
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* and don't need to duplicate tests
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*/
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pipe = urb->pipe;
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temp = usb_pipetype(pipe);
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is_out = usb_pipeout(pipe);
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xfertype = usb_endpoint_type(&ep->desc);
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is_out = usb_pipeout(urb->pipe);
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if (!usb_pipecontrol(pipe) && dev->state < USB_STATE_CONFIGURED)
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if (xfertype != USB_ENDPOINT_XFER_CONTROL &&
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dev->state < USB_STATE_CONFIGURED)
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return -ENODEV;
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/* FIXME there should be a sharable lock protecting us against
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* config/altsetting changes and disconnects, kicking in here.
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* (here == before maxpacket, and eventually endpoint type,
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* checks get made.)
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*/
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max = usb_maxpacket(dev, pipe, is_out);
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max = le16_to_cpu(ep->desc.wMaxPacketSize);
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if (max <= 0) {
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dev_dbg(&dev->dev,
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"bogus endpoint ep%d%s in %s (bad maxpacket %d)\n",
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usb_pipeendpoint(pipe), is_out ? "out" : "in",
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usb_endpoint_num(&ep->desc), is_out ? "out" : "in",
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__FUNCTION__, max);
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return -EMSGSIZE;
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}
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@ -323,7 +328,7 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
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* but drivers only control those sizes for ISO.
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* while we're checking, initialize return status.
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*/
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if (temp == PIPE_ISOCHRONOUS) {
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if (xfertype == USB_ENDPOINT_XFER_ISOC) {
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int n, len;
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/* "high bandwidth" mode, 1-3 packets/uframe? */
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@ -359,19 +364,19 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
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/* enforce simple/standard policy */
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allowed = (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP |
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URB_NO_INTERRUPT);
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switch (temp) {
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case PIPE_BULK:
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switch (xfertype) {
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case USB_ENDPOINT_XFER_BULK:
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if (is_out)
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allowed |= URB_ZERO_PACKET;
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/* FALLTHROUGH */
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case PIPE_CONTROL:
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case USB_ENDPOINT_XFER_CONTROL:
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allowed |= URB_NO_FSBR; /* only affects UHCI */
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/* FALLTHROUGH */
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default: /* all non-iso endpoints */
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if (!is_out)
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allowed |= URB_SHORT_NOT_OK;
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break;
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case PIPE_ISOCHRONOUS:
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case USB_ENDPOINT_XFER_ISOC:
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allowed |= URB_ISO_ASAP;
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break;
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}
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@ -393,9 +398,9 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
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* supports different values... this uses EHCI/UHCI defaults (and
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* EHCI can use smaller non-default values).
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*/
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switch (temp) {
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case PIPE_ISOCHRONOUS:
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case PIPE_INTERRUPT:
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switch (xfertype) {
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case USB_ENDPOINT_XFER_ISOC:
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case USB_ENDPOINT_XFER_INT:
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/* too small? */
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if (urb->interval <= 0)
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return -EINVAL;
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@ -405,29 +410,29 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
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// NOTE usb handles 2^15
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if (urb->interval > (1024 * 8))
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urb->interval = 1024 * 8;
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temp = 1024 * 8;
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max = 1024 * 8;
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break;
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case USB_SPEED_FULL: /* units are frames/msec */
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case USB_SPEED_LOW:
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if (temp == PIPE_INTERRUPT) {
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if (xfertype == USB_ENDPOINT_XFER_INT) {
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if (urb->interval > 255)
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return -EINVAL;
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// NOTE ohci only handles up to 32
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temp = 128;
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max = 128;
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} else {
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if (urb->interval > 1024)
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urb->interval = 1024;
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// NOTE usb and ohci handle up to 2^15
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temp = 1024;
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max = 1024;
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}
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break;
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default:
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return -EINVAL;
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}
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/* power of two? */
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while (temp > urb->interval)
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temp >>= 1;
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urb->interval = temp;
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while (max > urb->interval)
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max >>= 1;
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urb->interval = max;
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}
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return usb_hcd_submit_urb(urb, mem_flags);
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@ -554,6 +554,29 @@ static inline int usb_make_path (struct usb_device *dev, char *buf,
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/*-------------------------------------------------------------------------*/
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/**
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* usb_endpoint_num - get the endpoint's number
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* @epd: endpoint to be checked
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*
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* Returns @epd's number: 0 to 15.
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*/
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static inline int usb_endpoint_num(const struct usb_endpoint_descriptor *epd)
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{
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return epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
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}
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/**
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* usb_endpoint_type - get the endpoint's transfer type
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* @epd: endpoint to be checked
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*
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* Returns one of USB_ENDPOINT_XFER_{CONTROL, ISOC, BULK, INT} according
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* to @epd's transfer type.
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*/
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static inline int usb_endpoint_type(const struct usb_endpoint_descriptor *epd)
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{
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return epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
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}
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/**
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* usb_endpoint_dir_in - check if the endpoint has IN direction
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* @epd: endpoint to be checked
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@ -1037,6 +1060,8 @@ typedef void (*usb_complete_t)(struct urb *);
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* @urb_list: For use by current owner of the URB.
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* @anchor_list: membership in the list of an anchor
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* @anchor: to anchor URBs to a common mooring
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* @ep: Points to the endpoint's data structure. Will eventually
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* replace @pipe.
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* @pipe: Holds endpoint number, direction, type, and more.
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* Create these values with the eight macros available;
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* usb_{snd,rcv}TYPEpipe(dev,endpoint), where the TYPE is "ctrl"
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@ -1212,6 +1237,7 @@ struct urb
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struct list_head anchor_list; /* the URB may be anchored by the driver */
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struct usb_anchor *anchor;
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struct usb_device *dev; /* (in) pointer to associated device */
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struct usb_host_endpoint *ep; /* (internal) pointer to endpoint struct */
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unsigned int pipe; /* (in) pipe information */
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int status; /* (return) non-ISO status */
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unsigned int transfer_flags; /* (in) URB_SHORT_NOT_OK | ...*/
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