Implement DMA access synchronization in the driver

1 files changed, 14 insertions, 7 deletions

diff --git a/kmem.h b/kmem.h
index b09424c..42a2fac 100644
--- a/kmem.h
+++ b/kmem.h
@@ -4,15 +4,21 @@
 #include "pcilib.h"
 
 typedef enum {
-    PCILIB_KMEM_FLAG_REUSE = 1,		/**< Try to reuse buffers on alloc and only unmap non-reused buffers on free (reused are freed only if FORCE flag is specified) */
+    PCILIB_KMEM_FLAG_REUSE = KMEM_FLAG_REUSE,
+    PCILIB_KMEM_FLAG_EXCLUSIVE = KMEM_FLAG_EXCLUSIVE,
+    PCILIB_KMEM_FLAG_PERSISTENT = KMEM_FLAG_PERSISTENT,
+    PCILIB_KMEM_FLAG_HARDWARE = KMEM_FLAG_HW
 //    PCILIB_KMEM_FLAG_FORCE = 2		/**< Force buffer 
 } pcilib_kmem_flags_t;
 
 typedef enum {
-    PCILIB_KMEM_REUSE_ALLOCATED = 0,
-    PCILIB_KMEM_REUSE_PARTIAL = 1,
-    PCILIB_KMEM_REUSE_REUSED = 2
-} pcilib_kmem_reuse_t;
+    PCILIB_KMEM_REUSE_REUSED = PCILIB_TRISTATE_YES,
+    PCILIB_KMEM_REUSE_ALLOCATED = PCILIB_TRISTATE_NO,
+    PCILIB_KMEM_REUSE_PARTIAL = PCILIB_TRISTATE_PARTIAL,
+    PCILIB_KMEM_REUSE_PERSISTENT = 0x100,
+    PCILIB_KMEM_REUSE_HARDWARE = 0x200
+} pcilib_kmem_reuse_state_t;
+
 
 typedef struct {
     int handle_id;
@@ -33,7 +39,8 @@ typedef struct {
  */
 typedef struct {
     pcilib_kmem_addr_t addr;
-    pcilib_kmem_reuse_t reuse;
+    
+    pcilib_kmem_reuse_state_t reused;
 
     size_t n_blocks;
     pcilib_kmem_addr_t blocks[];
@@ -57,6 +64,6 @@ uintptr_t pcilib_kmem_get_pa(pcilib_t *ctx, pcilib_kmem_handle_t *k);
 void *pcilib_kmem_get_block_ua(pcilib_t *ctx, pcilib_kmem_handle_t *k, size_t block);
 uintptr_t pcilib_kmem_get_block_pa(pcilib_t *ctx, pcilib_kmem_handle_t *k, size_t block);
 size_t pcilib_kmem_get_block_size(pcilib_t *ctx, pcilib_kmem_handle_t *k, size_t block);
-pcilib_kmem_reuse_t pcilib_kmem_is_reused(pcilib_t *ctx, pcilib_kmem_handle_t *k);
+pcilib_kmem_reuse_state_t pcilib_kmem_is_reused(pcilib_t *ctx, pcilib_kmem_handle_t *k);
 
 #endif /* _PCILIB_KMEM_H */