USB: introduce unmap_urb_setup_for_dma()
Split unmap_urb_for_dma() to allow just the setup buffer to be unmapped. This allows HCDs to use PIO for the setup buffer if it is not suitable for DMA. Signed-off-by: Martin Fuzzey <mfuzzey@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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@ -1263,10 +1263,8 @@ static void hcd_free_coherent(struct usb_bus *bus, dma_addr_t *dma_handle,
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*dma_handle = 0;
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}
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void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
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void unmap_urb_setup_for_dma(struct usb_hcd *hcd, struct urb *urb)
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{
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enum dma_data_direction dir;
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if (urb->transfer_flags & URB_SETUP_MAP_SINGLE)
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dma_unmap_single(hcd->self.controller,
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urb->setup_dma,
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@ -1279,6 +1277,17 @@ void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
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sizeof(struct usb_ctrlrequest),
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DMA_TO_DEVICE);
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/* Make it safe to call this routine more than once */
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urb->transfer_flags &= ~(URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL);
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}
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EXPORT_SYMBOL_GPL(unmap_urb_setup_for_dma);
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void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
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{
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enum dma_data_direction dir;
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unmap_urb_setup_for_dma(hcd, urb);
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dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
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if (urb->transfer_flags & URB_DMA_MAP_SG)
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dma_unmap_sg(hcd->self.controller,
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@ -1303,8 +1312,7 @@ void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
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dir);
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/* Make it safe to call this routine more than once */
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urb->transfer_flags &= ~(URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL |
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URB_DMA_MAP_SG | URB_DMA_MAP_PAGE |
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urb->transfer_flags &= ~(URB_DMA_MAP_SG | URB_DMA_MAP_PAGE |
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URB_DMA_MAP_SINGLE | URB_MAP_LOCAL);
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}
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EXPORT_SYMBOL_GPL(unmap_urb_for_dma);
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@ -329,6 +329,7 @@ extern int usb_hcd_submit_urb(struct urb *urb, gfp_t mem_flags);
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extern int usb_hcd_unlink_urb(struct urb *urb, int status);
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extern void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb,
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int status);
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extern void unmap_urb_setup_for_dma(struct usb_hcd *, struct urb *);
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extern void unmap_urb_for_dma(struct usb_hcd *, struct urb *);
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extern void usb_hcd_flush_endpoint(struct usb_device *udev,
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struct usb_host_endpoint *ep);
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