radeon: radeon util library

1 files changed, 186 insertions, 0 deletions

diff --git a/libdrm/radeon/radeon_bo_gem.c b/libdrm/radeon/radeon_bo_gem.c
new file mode 100644
index 00000000..21fe41f9
--- /dev/null
+++ b/libdrm/radeon/radeon_bo_gem.c
@@ -0,0 +1,186 @@
+/* 
+ * Copyright © 2008 Dave Airlie
+ * Copyright © 2008 Jérôme Glisse
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ */
+/*
+ * Authors:
+ *      Dave Airlie
+ *      Jérôme Glisse <glisse@freedesktop.org>
+ */
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/ioctl.h>
+#include "xf86drm.h"
+#include "drm.h"
+#include "radeon_drm.h"
+#include "radeon_bo.h"
+#include "radeon_bo_gem.h"
+
+struct radeon_bo_gem {
+    struct radeon_bo    base;
+    int                 ref_count;
+    int                 map_count;
+};
+
+static struct radeon_bo *bo_open(struct radeon_bo_manager *bom,
+                                 uint32_t handle,
+                                 uint32_t size,
+                                 uint32_t alignment,
+                                 uint32_t flags)
+{
+    struct radeon_bo_gem *bo;
+    int r;
+
+    bo = (struct radeon_bo_gem*)calloc(1, sizeof(struct radeon_bo_gem));
+    if (bo == NULL) {
+        return NULL;
+    }
+
+    bo->base.bom = bom;
+    bo->base.handle = 0;
+    bo->base.size = size;
+    bo->base.alignment = alignment;
+    bo->base.flags = flags;
+    bo->base.ptr = NULL;
+    bo->ref_count = 0;
+    bo->map_count = 0;
+
+    if (handle) {
+        struct drm_gem_open open_arg;
+
+        memset(&open_arg, 0, sizeof(open_arg));
+        open_arg.name = handle;
+        r = ioctl(bom->fd, DRM_IOCTL_GEM_OPEN, &open_arg);
+        if (r != 0) {
+            fprintf(stderr, "GEM open failed: %d (%s)\n",r,strerror(r));
+            free(bo);
+            return NULL;
+        }
+        bo->base.handle = handle;
+    } else {
+        struct drm_radeon_gem_create args;
+
+        args.size = size;
+        args.alignment = alignment;
+        args.initial_domain = RADEON_GEM_DOMAIN_CPU;
+        args.no_backing_store = 0;
+        r = drmCommandWriteRead(bom->fd, DRM_RADEON_GEM_CREATE,
+                                &args, sizeof(args));
+        bo->base.handle = args.handle;
+        if (r) {
+            free(bo);
+            return NULL;
+        }
+    }
+    return (struct radeon_bo*)bo;
+}
+
+static void bo_close(struct radeon_bo *bo)
+{
+    struct radeon_bo_gem *bo_gem = (struct radeon_bo_gem*)bo;
+    struct drm_gem_close args;
+
+    if (bo == NULL) {
+        return;
+    }
+    if (bo_gem->ref_count) {
+        /* FIXME: what to do ? */
+    }
+
+    if (bo_gem->map_count) {
+        munmap(bo->ptr, bo->size);
+    }
+
+    /* close object */
+    args.handle = bo->handle;
+    ioctl(bo->bom->fd, DRM_IOCTL_GEM_CLOSE, &args);
+    free(bo_gem);
+}
+
+static void bo_pin(struct radeon_bo *bo)
+{
+    struct radeon_bo_gem *bo_gem = (struct radeon_bo_gem*)bo;
+
+    bo_gem->ref_count++;
+}
+
+static void bo_unpin(struct radeon_bo *bo)
+{
+    struct radeon_bo_gem *bo_gem = (struct radeon_bo_gem*)bo;
+
+    bo_gem->ref_count--;
+}
+
+static int bo_map(struct radeon_bo *bo, unsigned int flags)
+{
+    struct radeon_bo_gem *bo_gem = (struct radeon_bo_gem*)bo;
+    struct drm_radeon_gem_mmap args;
+    int r;
+
+    if (bo_gem->map_count++ != 0) {
+        return 0;
+    }
+    args.handle = bo->handle;
+    args.offset = 0;
+    args.size = bo->size;
+
+    r = drmCommandWriteRead(bo->bom->fd,
+                            DRM_RADEON_GEM_MMAP,
+                            &args,
+                            sizeof(args));
+    if (!r) {
+        bo->ptr = (void *)(unsigned long)args.addr_ptr;
+    }
+    return r;
+}
+
+static int bo_unmap(struct radeon_bo *bo)
+{
+    struct radeon_bo_gem *bo_gem = (struct radeon_bo_gem*)bo;
+
+    if (--bo_gem->map_count > 0) {
+        return 0;
+    }
+
+    munmap(bo->ptr, bo->size);
+    bo->ptr = NULL;
+    return 0;
+}
+
+static struct radeon_bo_funcs bo_gem_funcs = {
+    bo_open,
+    bo_close,
+    bo_pin,
+    bo_unpin,
+    bo_map,
+    bo_unmap
+};
+
+struct radeon_bo_funcs *radeon_bo_gem_initialize(int fd)
+{
+    return &bo_gem_funcs; 
+}