First iteration of work to preserve DMA state between executions

1 files changed, 14 insertions, 2 deletions

diff --git a/kmem.h b/kmem.h
index a92d55a..b09424c 100644
--- a/kmem.h
+++ b/kmem.h
@@ -3,10 +3,20 @@
 
 #include "pcilib.h"
 
-typedef int pcilib_kmem_flags_t;
+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_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;
 
 typedef struct {
     int handle_id;
+    int reused;
     uintptr_t pa;
 //    uintptr_t va;
     void *ua;
@@ -23,6 +33,7 @@ typedef struct {
  */
 typedef struct {
     pcilib_kmem_addr_t addr;
+    pcilib_kmem_reuse_t reuse;
 
     size_t n_blocks;
     pcilib_kmem_addr_t blocks[];
@@ -39,12 +50,13 @@ struct pcilib_kmem_list_s {
 };
 
 pcilib_kmem_handle_t *pcilib_alloc_kernel_memory(pcilib_t *ctx, pcilib_kmem_type_t type, size_t nmemb, size_t size, size_t alignment, pcilib_kmem_use_t use, pcilib_kmem_flags_t flags);
-void pcilib_free_kernel_memory(pcilib_t *ctx, pcilib_kmem_handle_t *k);
+void pcilib_free_kernel_memory(pcilib_t *ctx, pcilib_kmem_handle_t *k, pcilib_kmem_flags_t flags);
 int pcilib_sync_kernel_memory(pcilib_t *ctx, pcilib_kmem_handle_t *k, pcilib_kmem_sync_direction_t dir);
 void *pcilib_kmem_get_ua(pcilib_t *ctx, pcilib_kmem_handle_t *k);
 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);
 
 #endif /* _PCILIB_KMEM_H */