Changeset 7e1b130 in mainline for uspace/lib/usbdev/include/usb/dev/poll.h

Timestamp:

2011-12-23T18:13:33Z (12 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

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

Children:

3819ce5, b39eb79, f0b74b2

Parents:

2f0dd2a (diff), 153cc76a (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:

USB branch changes.

+ USB device drivers use single async session to host controller, this session (represented by usb_hc_connection_t) is used for both HC requests and to back usb device connection.
+ Pipe locking was removed. Reference counting was moved to usb_hc_connection_t. Every read/write operation uses separate parallel exchange thus any contention is resolved on hc side.

• async_sess_t setup using EXCHANGE_PARALLEL uses one extra phone (session phone, each exch creates its own), thus the number of phones used by usb dvice driver might increase. Possible solutions are: make read/write calls atomic (all other calls are atomic) and use EXCHANGE_ATOMIC, any other solution provided by changes to async_sess_t.

File:

• uspace/lib/usbdev/include/usb/dev/poll.h (modified) (2 diffs)

uspace/lib/usbdev/include/usb/dev/poll.h

@@ -39 +39 @@
 #include <time.h>
 
+/** Parameters and callbacks for automated polling. */
 typedef struct {
         /** Level of debugging messages from auto polling.
@@ -82 +83 @@
          */
         bool (*on_error)(usb_device_t *dev, int err_code, void *arg);
+        /** Argument to pass to callbacks. */
+        void *arg;
 } usb_device_auto_polling_t;
 
 int usb_device_auto_polling(usb_device_t *, size_t,
-    const usb_device_auto_polling_t *, size_t, void *);
+    const usb_device_auto_polling_t *, size_t);
 
 typedef bool (*usb_polling_callback_t)(usb_device_t *,