Changeset e67c50a in mainline for uspace/drv/bus/usb/ohci/hw_struct/endpoint_descriptor.h

Timestamp:

2018-02-01T21:13:23Z (6 years ago)

Author:

Ondřej Hlavatý <aearsis@…>

Branches:

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

Children:

64ce0c1

Parents:

3e6ff9a

git-author:

Ondřej Hlavatý <aearsis@…> (2018-02-01 21:13:22)

git-committer:

Ondřej Hlavatý <aearsis@…> (2018-02-01 21:13:23)

Message:

ohci: use dma memory responsibly

Instead of leaving arbitrary TD behind to be used by next transfer,
prepare two of them in endpoint and use them in a cyclic manner. This
reduces the number of pages allocated per transfer to one.

File:

• uspace/drv/bus/usb/ohci/hw_struct/endpoint_descriptor.h (modified) (1 diff)

uspace/drv/bus/usb/ohci/hw_struct/endpoint_descriptor.h

@@ -165 +165 @@
 
 /**
+ * Set the HeadP of ED. Do not call unless the ED is Halted.
+ * @param instance ED
+ */
+static inline void ed_set_head_td(ed_t *instance, const td_t *td)
+{
+        assert(instance);
+        const uintptr_t pa = addr_to_phys(td);
+        OHCI_MEM32_WR(instance->td_head, pa & ED_TDHEAD_PTR_MASK);
+}
+
+/**
  * Set next ED in ED chain.
  * @param instance ED to modify