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USB: xhci: Configure endpoint code refactoring.
Refactor out the code issue, wait for, and parse the event completion code for a configure endpoint command. Modify it to support the evaluate context command, which has a very similar submission process. Add functions to copy parts of the output context into the input context (which will be used in the evaluate context command). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Sarah Sharp
Greg Kroah-Hartman
parent
018218d1d9
commit
f2217e8edd
@ -942,6 +942,122 @@ static void xhci_zero_in_ctx(struct xhci_hcd *xhci, struct xhci_virt_device *vir
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}
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}
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static int xhci_configure_endpoint_result(struct xhci_hcd *xhci,
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struct usb_device *udev, struct xhci_virt_device *virt_dev)
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{
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int ret;
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switch (virt_dev->cmd_status) {
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case COMP_ENOMEM:
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dev_warn(&udev->dev, "Not enough host controller resources "
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"for new device state.\n");
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ret = -ENOMEM;
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/* FIXME: can we allocate more resources for the HC? */
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break;
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case COMP_BW_ERR:
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dev_warn(&udev->dev, "Not enough bandwidth "
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"for new device state.\n");
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ret = -ENOSPC;
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/* FIXME: can we go back to the old state? */
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break;
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case COMP_TRB_ERR:
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/* the HCD set up something wrong */
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dev_warn(&udev->dev, "ERROR: Endpoint drop flag = 0, "
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"add flag = 1, "
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"and endpoint is not disabled.\n");
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ret = -EINVAL;
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break;
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case COMP_SUCCESS:
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dev_dbg(&udev->dev, "Successful Endpoint Configure command\n");
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ret = 0;
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break;
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default:
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xhci_err(xhci, "ERROR: unexpected command completion "
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"code 0x%x.\n", virt_dev->cmd_status);
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ret = -EINVAL;
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break;
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}
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return ret;
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}
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static int xhci_evaluate_context_result(struct xhci_hcd *xhci,
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struct usb_device *udev, struct xhci_virt_device *virt_dev)
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{
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int ret;
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switch (virt_dev->cmd_status) {
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case COMP_EINVAL:
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dev_warn(&udev->dev, "WARN: xHCI driver setup invalid evaluate "
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"context command.\n");
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ret = -EINVAL;
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break;
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case COMP_EBADSLT:
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dev_warn(&udev->dev, "WARN: slot not enabled for"
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"evaluate context command.\n");
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case COMP_CTX_STATE:
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dev_warn(&udev->dev, "WARN: invalid context state for "
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"evaluate context command.\n");
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xhci_dbg_ctx(xhci, virt_dev->out_ctx, 1);
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ret = -EINVAL;
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break;
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case COMP_SUCCESS:
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dev_dbg(&udev->dev, "Successful evaluate context command\n");
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ret = 0;
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break;
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default:
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xhci_err(xhci, "ERROR: unexpected command completion "
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"code 0x%x.\n", virt_dev->cmd_status);
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ret = -EINVAL;
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break;
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}
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return ret;
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}
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/* Issue a configure endpoint command or evaluate context command
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* and wait for it to finish.
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*/
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static int xhci_configure_endpoint(struct xhci_hcd *xhci,
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struct usb_device *udev, struct xhci_virt_device *virt_dev,
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bool ctx_change)
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{
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int ret;
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int timeleft;
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unsigned long flags;
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spin_lock_irqsave(&xhci->lock, flags);
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if (!ctx_change)
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ret = xhci_queue_configure_endpoint(xhci, virt_dev->in_ctx->dma,
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udev->slot_id);
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else
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ret = xhci_queue_evaluate_context(xhci, virt_dev->in_ctx->dma,
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udev->slot_id);
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if (ret < 0) {
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spin_unlock_irqrestore(&xhci->lock, flags);
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xhci_dbg(xhci, "FIXME allocate a new ring segment\n");
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return -ENOMEM;
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}
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xhci_ring_cmd_db(xhci);
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spin_unlock_irqrestore(&xhci->lock, flags);
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/* Wait for the configure endpoint command to complete */
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timeleft = wait_for_completion_interruptible_timeout(
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&virt_dev->cmd_completion,
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USB_CTRL_SET_TIMEOUT);
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if (timeleft <= 0) {
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xhci_warn(xhci, "%s while waiting for %s command\n",
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timeleft == 0 ? "Timeout" : "Signal",
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ctx_change == 0 ?
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"configure endpoint" :
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"evaluate context");
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/* FIXME cancel the configure endpoint command */
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return -ETIME;
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}
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if (!ctx_change)
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return xhci_configure_endpoint_result(xhci, udev, virt_dev);
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return xhci_evaluate_context_result(xhci, udev, virt_dev);
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}
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/* Called after one or more calls to xhci_add_endpoint() or
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* xhci_drop_endpoint(). If this call fails, the USB core is expected
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* to call xhci_reset_bandwidth().
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@ -956,8 +1072,6 @@ int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev)
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{
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int i;
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int ret = 0;
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int timeleft;
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unsigned long flags;
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struct xhci_hcd *xhci;
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struct xhci_virt_device *virt_dev;
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struct xhci_input_control_ctx *ctrl_ctx;
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@ -987,56 +1101,7 @@ int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev)
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xhci_dbg_ctx(xhci, virt_dev->in_ctx,
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LAST_CTX_TO_EP_NUM(slot_ctx->dev_info));
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spin_lock_irqsave(&xhci->lock, flags);
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ret = xhci_queue_configure_endpoint(xhci, virt_dev->in_ctx->dma,
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udev->slot_id);
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if (ret < 0) {
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spin_unlock_irqrestore(&xhci->lock, flags);
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xhci_dbg(xhci, "FIXME allocate a new ring segment\n");
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return -ENOMEM;
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}
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xhci_ring_cmd_db(xhci);
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spin_unlock_irqrestore(&xhci->lock, flags);
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/* Wait for the configure endpoint command to complete */
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timeleft = wait_for_completion_interruptible_timeout(
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&virt_dev->cmd_completion,
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USB_CTRL_SET_TIMEOUT);
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if (timeleft <= 0) {
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xhci_warn(xhci, "%s while waiting for configure endpoint command\n",
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timeleft == 0 ? "Timeout" : "Signal");
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/* FIXME cancel the configure endpoint command */
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return -ETIME;
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}
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switch (virt_dev->cmd_status) {
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case COMP_ENOMEM:
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dev_warn(&udev->dev, "Not enough host controller resources "
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"for new device state.\n");
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ret = -ENOMEM;
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/* FIXME: can we allocate more resources for the HC? */
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break;
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case COMP_BW_ERR:
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dev_warn(&udev->dev, "Not enough bandwidth "
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"for new device state.\n");
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ret = -ENOSPC;
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/* FIXME: can we go back to the old state? */
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break;
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case COMP_TRB_ERR:
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/* the HCD set up something wrong */
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dev_warn(&udev->dev, "ERROR: Endpoint drop flag = 0, add flag = 1, "
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"and endpoint is not disabled.\n");
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ret = -EINVAL;
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break;
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case COMP_SUCCESS:
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dev_dbg(&udev->dev, "Successful Endpoint Configure command\n");
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break;
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default:
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xhci_err(xhci, "ERROR: unexpected command completion "
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"code 0x%x.\n", virt_dev->cmd_status);
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ret = -EINVAL;
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break;
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}
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ret = xhci_configure_endpoint(xhci, udev, virt_dev, false);
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if (ret) {
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/* Callee should call reset_bandwidth() */
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return ret;
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@ -601,6 +601,44 @@ void xhci_endpoint_zero(struct xhci_hcd *xhci,
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*/
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}
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/* Copy output xhci_ep_ctx to the input xhci_ep_ctx copy.
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* Useful when you want to change one particular aspect of the endpoint and then
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* issue a configure endpoint command.
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*/
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void xhci_endpoint_copy(struct xhci_hcd *xhci,
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struct xhci_virt_device *vdev, unsigned int ep_index)
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{
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struct xhci_ep_ctx *out_ep_ctx;
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struct xhci_ep_ctx *in_ep_ctx;
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out_ep_ctx = xhci_get_ep_ctx(xhci, vdev->out_ctx, ep_index);
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in_ep_ctx = xhci_get_ep_ctx(xhci, vdev->in_ctx, ep_index);
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in_ep_ctx->ep_info = out_ep_ctx->ep_info;
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in_ep_ctx->ep_info2 = out_ep_ctx->ep_info2;
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in_ep_ctx->deq = out_ep_ctx->deq;
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in_ep_ctx->tx_info = out_ep_ctx->tx_info;
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}
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/* Copy output xhci_slot_ctx to the input xhci_slot_ctx.
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* Useful when you want to change one particular aspect of the endpoint and then
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* issue a configure endpoint command. Only the context entries field matters,
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* but we'll copy the whole thing anyway.
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*/
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void xhci_slot_copy(struct xhci_hcd *xhci, struct xhci_virt_device *vdev)
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{
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struct xhci_slot_ctx *in_slot_ctx;
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struct xhci_slot_ctx *out_slot_ctx;
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in_slot_ctx = xhci_get_slot_ctx(xhci, vdev->in_ctx);
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out_slot_ctx = xhci_get_slot_ctx(xhci, vdev->out_ctx);
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in_slot_ctx->dev_info = out_slot_ctx->dev_info;
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in_slot_ctx->dev_info2 = out_slot_ctx->dev_info2;
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in_slot_ctx->tt_info = out_slot_ctx->tt_info;
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in_slot_ctx->dev_state = out_slot_ctx->dev_state;
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}
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/* Set up the scratchpad buffer array and scratchpad buffers, if needed. */
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static int scratchpad_alloc(struct xhci_hcd *xhci, gfp_t flags)
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{
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@ -1740,6 +1740,15 @@ int xhci_queue_configure_endpoint(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr,
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TRB_TYPE(TRB_CONFIG_EP) | SLOT_ID_FOR_TRB(slot_id));
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}
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/* Queue an evaluate context command TRB */
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int xhci_queue_evaluate_context(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr,
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u32 slot_id)
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{
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return queue_command(xhci, lower_32_bits(in_ctx_ptr),
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upper_32_bits(in_ctx_ptr), 0,
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TRB_TYPE(TRB_EVAL_CONTEXT) | SLOT_ID_FOR_TRB(slot_id));
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}
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int xhci_queue_stop_endpoint(struct xhci_hcd *xhci, int slot_id,
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unsigned int ep_index)
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{
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@ -1168,6 +1168,9 @@ int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *ud
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unsigned int xhci_get_endpoint_index(struct usb_endpoint_descriptor *desc);
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unsigned int xhci_get_endpoint_flag(struct usb_endpoint_descriptor *desc);
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void xhci_endpoint_zero(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev, struct usb_host_endpoint *ep);
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void xhci_endpoint_copy(struct xhci_hcd *xhci,
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struct xhci_virt_device *vdev, unsigned int ep_index);
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void xhci_slot_copy(struct xhci_hcd *xhci, struct xhci_virt_device *vdev);
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int xhci_endpoint_init(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev,
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struct usb_device *udev, struct usb_host_endpoint *ep,
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gfp_t mem_flags);
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@ -1216,6 +1219,8 @@ int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags, struct urb *urb,
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int slot_id, unsigned int ep_index);
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int xhci_queue_configure_endpoint(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr,
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u32 slot_id);
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int xhci_queue_evaluate_context(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr,
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u32 slot_id);
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int xhci_queue_reset_ep(struct xhci_hcd *xhci, int slot_id,
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unsigned int ep_index);
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void xhci_find_new_dequeue_state(struct xhci_hcd *xhci,
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