From 8af56be185a94e39c80ce90fc9f83f3058a3ce80 Mon Sep 17 00:00:00 2001 From: Andiry Xu Date: Thu, 22 Jul 2010 15:23:03 -0700 Subject: [PATCH] USB: xHCI: handle_tx_event() refactor: process_ctrl_td This patch moves the ctrl td processing part in handle_tx_event() into a separate function process_ctrl_td(). Signed-off-by: Andiry Xu Signed-off-by: Sarah Sharp Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-ring.c | 184 ++++++++++++++++++++--------------- 1 file changed, 106 insertions(+), 78 deletions(-) diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index 691a108295ea..e28cfd15e1a6 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -1355,6 +1355,109 @@ td_cleanup: return ret; } +/* + * Process control tds, update urb status and actual_length. + */ +static int process_ctrl_td(struct xhci_hcd *xhci, struct xhci_td *td, + union xhci_trb *event_trb, struct xhci_transfer_event *event, + struct xhci_virt_ep *ep, int *status) +{ + struct xhci_virt_device *xdev; + struct xhci_ring *ep_ring; + unsigned int slot_id; + int ep_index; + struct xhci_ep_ctx *ep_ctx; + u32 trb_comp_code; + + slot_id = TRB_TO_SLOT_ID(event->flags); + xdev = xhci->devs[slot_id]; + ep_index = TRB_TO_EP_ID(event->flags) - 1; + ep_ring = xhci_dma_to_transfer_ring(ep, event->buffer); + ep_ctx = xhci_get_ep_ctx(xhci, xdev->out_ctx, ep_index); + trb_comp_code = GET_COMP_CODE(event->transfer_len); + + xhci_debug_trb(xhci, xhci->event_ring->dequeue); + switch (trb_comp_code) { + case COMP_SUCCESS: + if (event_trb == ep_ring->dequeue) { + xhci_warn(xhci, "WARN: Success on ctrl setup TRB " + "without IOC set??\n"); + *status = -ESHUTDOWN; + } else if (event_trb != td->last_trb) { + xhci_warn(xhci, "WARN: Success on ctrl data TRB " + "without IOC set??\n"); + *status = -ESHUTDOWN; + } else { + xhci_dbg(xhci, "Successful control transfer!\n"); + *status = 0; + } + break; + case COMP_SHORT_TX: + xhci_warn(xhci, "WARN: short transfer on control ep\n"); + if (td->urb->transfer_flags & URB_SHORT_NOT_OK) + *status = -EREMOTEIO; + else + *status = 0; + break; + default: + if (!xhci_requires_manual_halt_cleanup(xhci, + ep_ctx, trb_comp_code)) + break; + xhci_dbg(xhci, "TRB error code %u, " + "halted endpoint index = %u\n", + trb_comp_code, ep_index); + /* else fall through */ + case COMP_STALL: + /* Did we transfer part of the data (middle) phase? */ + if (event_trb != ep_ring->dequeue && + event_trb != td->last_trb) + td->urb->actual_length = + td->urb->transfer_buffer_length + - TRB_LEN(event->transfer_len); + else + td->urb->actual_length = 0; + + xhci_cleanup_halted_endpoint(xhci, + slot_id, ep_index, 0, td, event_trb); + return finish_td(xhci, td, event_trb, event, ep, status, true); + } + /* + * Did we transfer any data, despite the errors that might have + * happened? I.e. did we get past the setup stage? + */ + if (event_trb != ep_ring->dequeue) { + /* The event was for the status stage */ + if (event_trb == td->last_trb) { + if (td->urb->actual_length != 0) { + /* Don't overwrite a previously set error code + */ + if ((*status == -EINPROGRESS || *status == 0) && + (td->urb->transfer_flags + & URB_SHORT_NOT_OK)) + /* Did we already see a short data + * stage? */ + *status = -EREMOTEIO; + } else { + td->urb->actual_length = + td->urb->transfer_buffer_length; + } + } else { + /* Maybe the event was for the data stage? */ + if (trb_comp_code != COMP_STOP_INVAL) { + /* We didn't stop on a link TRB in the middle */ + td->urb->actual_length = + td->urb->transfer_buffer_length - + TRB_LEN(event->transfer_len); + xhci_dbg(xhci, "Waiting for status " + "stage event\n"); + return 0; + } + } + } + + return finish_td(xhci, td, event_trb, event, ep, status, false); +} + /* * If this function returns an error condition, it means it got a Transfer * event with a corrupted Slot ID, Endpoint ID, or TRB DMA address. @@ -1482,84 +1585,9 @@ static int handle_tx_event(struct xhci_hcd *xhci, /* Now update the urb's actual_length and give back to the core */ /* Was this a control transfer? */ if (usb_endpoint_xfer_control(&td->urb->ep->desc)) { - xhci_debug_trb(xhci, xhci->event_ring->dequeue); - switch (trb_comp_code) { - case COMP_SUCCESS: - if (event_trb == ep_ring->dequeue) { - xhci_warn(xhci, "WARN: Success on ctrl setup TRB without IOC set??\n"); - status = -ESHUTDOWN; - } else if (event_trb != td->last_trb) { - xhci_warn(xhci, "WARN: Success on ctrl data TRB without IOC set??\n"); - status = -ESHUTDOWN; - } else { - xhci_dbg(xhci, "Successful control transfer!\n"); - status = 0; - } - break; - case COMP_SHORT_TX: - xhci_warn(xhci, "WARN: short transfer on control ep\n"); - if (td->urb->transfer_flags & URB_SHORT_NOT_OK) - status = -EREMOTEIO; - else - status = 0; - break; - - default: - if (!xhci_requires_manual_halt_cleanup(xhci, - ep_ctx, trb_comp_code)) - break; - xhci_dbg(xhci, "TRB error code %u, " - "halted endpoint index = %u\n", - trb_comp_code, ep_index); - /* else fall through */ - case COMP_STALL: - /* Did we transfer part of the data (middle) phase? */ - if (event_trb != ep_ring->dequeue && - event_trb != td->last_trb) - td->urb->actual_length = - td->urb->transfer_buffer_length - - TRB_LEN(event->transfer_len); - else - td->urb->actual_length = 0; - - xhci_cleanup_halted_endpoint(xhci, - slot_id, ep_index, 0, td, event_trb); - - ret = finish_td(xhci, td, event_trb, event, ep, - &status, true); - goto cleanup; - } - /* - * Did we transfer any data, despite the errors that might have - * happened? I.e. did we get past the setup stage? - */ - if (event_trb != ep_ring->dequeue) { - /* The event was for the status stage */ - if (event_trb == td->last_trb) { - if (td->urb->actual_length != 0) { - /* Don't overwrite a previously set error code */ - if ((status == -EINPROGRESS || - status == 0) && - (td->urb->transfer_flags - & URB_SHORT_NOT_OK)) - /* Did we already see a short data stage? */ - status = -EREMOTEIO; - } else { - td->urb->actual_length = - td->urb->transfer_buffer_length; - } - } else { - /* Maybe the event was for the data stage? */ - if (trb_comp_code != COMP_STOP_INVAL) { - /* We didn't stop on a link TRB in the middle */ - td->urb->actual_length = - td->urb->transfer_buffer_length - - TRB_LEN(event->transfer_len); - xhci_dbg(xhci, "Waiting for status stage event\n"); - goto cleanup; - } - } - } + ret = process_ctrl_td(xhci, td, event_trb, event, ep, + &status); + goto cleanup; } else { switch (trb_comp_code) { case COMP_SUCCESS: -- 2.20.1