Changeset 293de44 in mainline for uspace/drv/ohci/hw_struct/transfer_descriptor.h

Timestamp:

2011-05-20T11:18:53Z (14 years ago)

Author:

Vojtech Horky <vojtechhorky@…>

Branches:

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

Children:

c7c2443

Parents:

160b75e (diff), 7941bd6 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge development/ changes

File:

• uspace/drv/ohci/hw_struct/transfer_descriptor.h (modified) (1 diff)

uspace/drv/ohci/hw_struct/transfer_descriptor.h

@@ -41 +41 @@
 #include "completion_codes.h"
 
-/* OHCI TDs can handle up to 8KB buffers */
-#define OHCI_TD_MAX_TRANSFER (8 * 1024)
+/* OHCI TDs can handle up to 8KB buffers, however, it can use max 2 pages.
+ * Using 4KB buffers guarantees the page count condition.
+ * (OHCI assumes 4KB pages) */
+#define OHCI_TD_MAX_TRANSFER (4 * 1024)
 
 typedef struct td {