Changeset 35c37fc in mainline for uspace/drv/bus/usb/ehci/ehci_batch.h

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/drv/bus/usb/ehci/ehci_batch.h (modified) (2 diffs)

uspace/drv/bus/usb/ehci/ehci_batch.h

@@ -39 +39 @@
 #include <stdbool.h>
 #include <usb/host/usb_transfer_batch.h>
+#include <usb/host/dma_buffer.h>
 
 #include "hw_struct/queue_head.h"
@@ -46 +47 @@
 typedef struct ehci_transfer_batch {
         usb_transfer_batch_t base;
+        /** Number of TDs used by the transfer */
+        size_t td_count;
         /** Link */
         link_t link;
         /** Endpoint descriptor of the target endpoint. */
         qh_t *qh;
-        /** List of TDs needed for the transfer */
-        td_t **tds;
-        /** Number of TDs used by the transfer */
-        size_t td_count;
         /** Data buffer, must be accessible by the EHCI hw. */
-        char *device_buffer;
+        dma_buffer_t dma_buffer;
+        /** List of TDs needed for the transfer - backed by dma_buffer */
+        td_t *tds;
+        /** Data buffers - backed by dma_buffer */
+        void *setup_buffer;
+        void *data_buffer;
         /** Generic USB transfer structure */
         usb_transfer_batch_t *usb_batch;