1 files changed, 52 insertions, 0 deletions
diff --git a/pcilib/mem.c b/pcilib/mem.c
new file mode 100644
index 0000000..d8f6391
--- /dev/null
+++ b/pcilib/mem.c
@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <string.h>
+#include <strings.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <errno.h>
+#include <assert.h>
+
+#include "pcilib.h"
+#include "locking.h"
+#include "mem.h"
+#include "error.h"
+#include "pci.h"
+
+
+
+void *pcilib_map_area(pcilib_t *ctx, uintptr_t addr, size_t size) {
+    void *res;
+    int err, ret; 
+
+    err = pcilib_lock_global(ctx);
+    if (err) {
+	pcilib_error("Error (%i) acquiring mmap lock", err);
+	return NULL;
+    }
+
+    ret = ioctl( ctx->handle, PCIDRIVER_IOC_MMAP_MODE, PCIDRIVER_MMAP_AREA );
+    if (ret) {
+	pcilib_unlock_global(ctx);
+	pcilib_error("PCIDRIVER_IOC_MMAP_MODE ioctl have failed");
+	return NULL;
+    }
+
+    res = mmap( 0, size, PROT_WRITE | PROT_READ, MAP_SHARED, ctx->handle, addr );
+
+    pcilib_unlock_global(ctx);
+
+    if ((!res)||(res == MAP_FAILED)) {
+	pcilib_error("Failed to mmap area 0x%lx of size %zu bytes", addr, size);
+	return NULL;
+    }
+
+    return res;
+}
+
+void pcilib_unmap_area(pcilib_t *ctx, void *addr, size_t size) {
+    munmap(addr, size);
+}