Changeset 1d758fc in mainline for uspace/lib/drv/include/usbhc_iface.h

Timestamp:

2018-02-12T10:11:47Z (7 years ago)

Author:

Ondřej Hlavatý <aearsis@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

5fe3f954

Parents:

2f762a7

git-author:

Ondřej Hlavatý <aearsis@…> (2018-02-05 03:28:50)

git-committer:

Ondřej Hlavatý <aearsis@…> (2018-02-12 10:11:47)

Message:

usb: rethinking DMA buffers

File:

• uspace/lib/drv/include/usbhc_iface.h (modified) (2 diffs)

uspace/lib/drv/include/usbhc_iface.h

@@ -104 +104 @@
 
 // FIXME: DMA buffers shall be part of libdrv anyway.
-typedef unsigned dma_policy_t;
+typedef uintptr_t dma_policy_t;
+
+typedef struct dma_buffer {
+        void *virt;
+        dma_policy_t policy;
+} dma_buffer_t;
 
 typedef struct usb_pipe_desc {
@@ -134 +139 @@
 
         /**
-         * Base address of the buffer to share. Must be at least offset + size
-         * large. Is patched after being transmitted over IPC, so the pointer is
-         * still valid.
-         *
-         * Note that offset might be actually more than PAGE_SIZE.
+         * The DMA buffer to share. Must be at least offset + size large. Is
+         * patched after being transmitted over IPC, so the pointer is still
+         * valid.
          */
-        void *base;
+        dma_buffer_t buffer;
         size_t offset;                  /**< Offset to the buffer */
         size_t size;                    /**< Requested size. */
-        dma_policy_t buffer_policy;     /**< Properties of the buffer. */
 } usbhc_iface_transfer_request_t;