Changeset 35c37fc in mainline for uspace/lib/usbhost/src/dma_buffer.c

Timestamp:

2018-01-05T20:15:08Z (6 years ago)

Author:

Ondřej Hlavatý <aearsis@…>

Branches:

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

Children:

9e5b162

Parents:

b60944b

git-author:

Ondřej Hlavatý <aearsis@…> (2018-01-05 16:11:04)

git-committer:

Ondřej Hlavatý <aearsis@…> (2018-01-05 20:15:08)

Message:

ehci: refactor to dma_buffers

One big hidden thing was refactored - now TDs are allocated in one
buffer together with setup and data buffers themselves. This reduces the
number of allocated pages per transfer to minimum.

File:

• uspace/lib/usbhost/src/dma_buffer.c (modified) (1 diff)

uspace/lib/usbhost/src/dma_buffer.c

@@ -105 +105 @@
 }
 
+/** Convert a pointer inside a buffer to physical address.
+ *
+ * @param[in] db Buffer at which virt is pointing
+ * @param[in] virt Pointer somewhere inside db
+ */
+uintptr_t dma_buffer_phys(const dma_buffer_t *db, void *virt)
+{
+        return db->phys + (virt - db->virt);
+}
+
 /**
  * @}