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-rw-r--r--src/drm/cairo-drm-bo.c130
1 files changed, 130 insertions, 0 deletions
diff --git a/src/drm/cairo-drm-bo.c b/src/drm/cairo-drm-bo.c
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+++ b/src/drm/cairo-drm-bo.c
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+/* Cairo - a vector graphics library with display and print output
+ *
+ * Copyright © 2009 Chris Wilson
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it either under the terms of the GNU Lesser General Public
+ * License version 2.1 as published by the Free Software Foundation
+ * (the "LGPL") or, at your option, under the terms of the Mozilla
+ * Public License Version 1.1 (the "MPL"). If you do not alter this
+ * notice, a recipient may use your version of this file under either
+ * the MPL or the LGPL.
+ *
+ * You should have received a copy of the LGPL along with this library
+ * in the file COPYING-LGPL-2.1; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
+ * You should have received a copy of the MPL along with this library
+ * in the file COPYING-MPL-1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
+ * OF ANY KIND, either express or implied. See the LGPL or the MPL for
+ * the specific language governing rights and limitations.
+ *
+ */
+
+#include "cairoint.h"
+
+#include "cairo-drm-private.h"
+#include "cairo-drm-ioctl-private.h"
+
+#include "cairo-error-private.h"
+
+#include <sys/ioctl.h>
+#include <errno.h>
+
+#define ERR_DEBUG(x) x
+
+struct drm_gem_close {
+ /** Handle of the object to be closed. */
+ uint32_t handle;
+ uint32_t pad;
+};
+
+struct drm_gem_flink {
+ /** Handle for the object being named */
+ uint32_t handle;
+
+ /** Returned global name */
+ uint32_t name;
+};
+
+struct drm_gem_open {
+ /** Name of object being opened */
+ uint32_t name;
+
+ /** Returned handle for the object */
+ uint32_t handle;
+
+ /** Returned size of the object */
+ uint64_t size;
+};
+
+#define DRM_IOCTL_GEM_CLOSE DRM_IOW (0x09, struct drm_gem_close)
+#define DRM_IOCTL_GEM_FLINK DRM_IOWR(0x0a, struct drm_gem_flink)
+#define DRM_IOCTL_GEM_OPEN DRM_IOWR(0x0b, struct drm_gem_open)
+
+cairo_status_t
+_cairo_drm_bo_open_for_name (const cairo_drm_device_t *dev,
+ cairo_drm_bo_t *bo,
+ uint32_t name)
+{
+ struct drm_gem_open open;
+ int ret;
+
+ open.name = name;
+ open.handle = 0;
+ open.size = 0;
+ do {
+ ret = ioctl (dev->fd, DRM_IOCTL_GEM_OPEN, &open);
+ } while (ret == -1 && errno == EINTR);
+ if (ret == -1) {
+ ERR_DEBUG((fprintf (stderr, "Failed to open bo for name %d: %s\n",
+ name, strerror (errno))));
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ }
+
+ bo->name = name;
+ bo->size = open.size;
+ bo->handle = open.handle;
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+cairo_status_t
+_cairo_drm_bo_flink (const cairo_drm_device_t *dev,
+ cairo_drm_bo_t *bo)
+{
+ struct drm_gem_flink flink;
+ int ret;
+
+ memset (&flink, 0, sizeof (flink));
+ flink.handle = bo->handle;
+ ret = ioctl (dev->fd, DRM_IOCTL_GEM_FLINK, &flink);
+ if (ret == -1) {
+ ERR_DEBUG((fprintf (stderr, "Failed to flink bo: %s\n",
+ strerror (errno))));
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ }
+
+ bo->name = flink.name;
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+void
+_cairo_drm_bo_close (const cairo_drm_device_t *dev,
+ cairo_drm_bo_t *bo)
+{
+ struct drm_gem_close close;
+ int ret;
+
+ close.handle = bo->handle;
+ do {
+ ret = ioctl (dev->fd, DRM_IOCTL_GEM_CLOSE, &close);
+ } while (ret == -1 && errno == EINTR);
+}