Changeset c6ae4c2 in mainline for uspace/lib/c/generic/ddi.c

Timestamp:

2011-12-16T21:12:52Z (13 years ago)

Author:

Martin Decky <martin@…>

Branches:

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

Children:

c8751452

Parents:

e2718e1

Message:

implement basic DMA memory mapping routines
no persistent locking (pinning) of the DMA memory is currently implemented (this can be dangerous)
no unmapping is implemented
special allocations (< 16 MB, < 4 GB) are not supported yet

File:

• uspace/lib/c/generic/ddi.c (modified) (3 diffs)

uspace/lib/c/generic/ddi.c

@@ -33 +33 @@
  */
 
+#include <assert.h>
+#include <unistd.h>
+#include <errno.h>
 #include <sys/types.h>
 #include <abi/ddi/arg.h>
@@ -57 +60 @@
  * Caller of this function must have the CAP_MEM_MANAGER capability.
  *
- * @param pf    Physical address of the starting frame.
- * @param vp    Virtual address of the starting page.
+ * @param phys  Physical address of the starting frame.
+ * @param virt  Virtual address of the starting page.
  * @param pages Number of pages to map.
  * @param flags Flags for the new address space area.
@@ -69 +72 @@
  *
  */
-int physmem_map(void *pf, void *vp, size_t pages, unsigned int flags)
+int physmem_map(void *phys, void *virt, size_t pages, unsigned int flags)
 {
-        return __SYSCALL4(SYS_PHYSMEM_MAP, (sysarg_t) pf, (sysarg_t) vp,
-            pages, flags);
+        return __SYSCALL4(SYS_PHYSMEM_MAP, (sysarg_t) phys,
+            (sysarg_t) virt, pages, flags);
 }
 
-int dmamem_map(dmamem_t *dmamem, size_t pages, unsigned int map_flags,
-    unsigned int dma_flags)
+int dmamem_map(void *virt, size_t size, unsigned int map_flags,
+    unsigned int flags, void **phys)
 {
-        // FIXME TODO
-        return -1;
+        return (int) __SYSCALL5(SYS_DMAMEM_MAP, (sysarg_t) virt,
+            (sysarg_t) size, (sysarg_t) map_flags, (sysarg_t) flags,
+            (sysarg_t) phys);
 }
 
-int dmamem_unmap(dmamem_t *dmamem)
+int dmamem_map_anonymous(size_t size, unsigned int map_flags,
+    unsigned int flags, void **phys, void **virt)
 {
-        // FIXME TODO
-        return -1;
+        *virt = as_get_mappable_page(size);
+        if (*virt == NULL)
+                return ENOMEM;
+        
+        return dmamem_map(*virt, size, map_flags,
+            flags | DMAMEM_FLAGS_ANONYMOUS, phys);
 }
 
-int dmamem_lock(void *virt, void **phys, size_t pages)
+int dmamem_unmap(void *virt, size_t size, unsigned int flags)
 {
-        // FIXME TODO
-        return -1;
+        return __SYSCALL3(SYS_DMAMEM_UNMAP, (sysarg_t) virt, (sysarg_t) size,
+            (sysarg_t) flags);
 }
 
-int dmamem_unlock(void *virt, size_t pages)
+int dmamem_unmap_anonymous(void *virt)
 {
-        // FIXME TODO
-        return -1;
+        return __SYSCALL3(SYS_DMAMEM_UNMAP, (sysarg_t) virt, 0,
+            DMAMEM_FLAGS_ANONYMOUS);
 }