initial commit

1 files changed, 304 insertions, 0 deletions

diff --git a/gralloc_drm.c b/gralloc_drm.c
new file mode 100644
index 0000000..63e504b
--- /dev/null
+++ b/gralloc_drm.c
@@ -0,0 +1,304 @@
+/*
+ * Copyright (C) 2010-2011 Chia-I Wu <olvaffe@gmail.com>
+ * Copyright (C) 2010-2011 LunarG Inc.
+ *
+ * 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, sublicense,
+ * 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 above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
+ */
+
+#define LOG_TAG "GRALLOC-DRM"
+
+#include <cutils/log.h>
+#include <cutils/atomic.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "gralloc_drm.h"
+#include "gralloc_drm_priv.h"
+
+#define unlikely(x) __builtin_expect(!!(x), 0)
+
+#define GRALLOC_DRM_DEVICE "/dev/dri/card0"
+
+static int32_t gralloc_drm_pid = 0;
+
+/*
+ * Return the pid of the process.
+ */
+static int gralloc_drm_get_pid(void)
+{
+	if (unlikely(!gralloc_drm_pid))
+		android_atomic_write((int32_t) getpid(), &gralloc_drm_pid);
+
+	return gralloc_drm_pid;
+}
+
+/*
+ * Create the driver for a DRM fd.
+ */
+static struct gralloc_drm_drv_t *
+init_drv_from_fd(int fd)
+{
+	struct gralloc_drm_drv_t *drv = NULL;
+	drmVersionPtr version;
+
+	/* get the kernel module name */
+	version = drmGetVersion(fd);
+	if (!version) {
+		LOGE("invalid DRM fd");
+		return NULL;
+	}
+
+	if (version->name) {
+#ifdef ENABLE_INTEL
+		if (!drv && !strcmp(version->name, "i915"))
+			drv = gralloc_drm_drv_create_for_intel(fd);
+#endif
+#ifdef ENABLE_RADEON
+		if (!drv && !strcmp(version->name, "radeon"))
+			drv = gralloc_drm_drv_create_for_radeon(fd);
+#endif
+#ifdef ENABLE_VMWGFX
+		if (!drv && !strcmp(version->name, "vmwgfx"))
+			drv = gralloc_drm_drv_create_for_vmwgfx(fd);
+#endif
+	}
+
+	if (!drv) {
+		LOGE("unsupported driver: %s", (version->name) ?
+				version->name : "NULL");
+	}
+
+	drmFreeVersion(version);
+
+	return drv;
+}
+
+/*
+ * Create a DRM device object.
+ */
+struct gralloc_drm_t *gralloc_drm_create(void)
+{
+	struct gralloc_drm_t *drm;
+	int err;
+
+	drm = calloc(1, sizeof(*drm));
+	if (!drm)
+		return NULL;
+
+	drm->fd = open(GRALLOC_DRM_DEVICE, O_RDWR);
+	if (drm->fd < 0) {
+		LOGE("failed to open %s", GRALLOC_DRM_DEVICE);
+		return NULL;
+	}
+
+	drm->drv = init_drv_from_fd(drm->fd);
+	if (!drm->drv) {
+		close(drm->fd);
+		free(drm);
+		return NULL;
+	}
+
+	return drm;
+}
+
+/*
+ * Destroy a DRM device object.
+ */
+void gralloc_drm_destroy(struct gralloc_drm_t *drm)
+{
+	if (drm->drv)
+		drm->drv->destroy(drm->drv);
+	close(drm->fd);
+	free(drm);
+}
+
+/*
+ * Get the file descriptor of a DRM device object.
+ */
+int gralloc_drm_get_fd(struct gralloc_drm_t *drm)
+{
+	return drm->fd;
+}
+
+/*
+ * Get the magic for authentication.
+ */
+int gralloc_drm_get_magic(struct gralloc_drm_t *drm, int32_t *magic)
+{
+	return drmGetMagic(drm->fd, (drm_magic_t *) magic);
+}
+
+/*
+ * Authenticate a magic.
+ */
+int gralloc_drm_auth_magic(struct gralloc_drm_t *drm, int32_t magic)
+{
+	return drmAuthMagic(drm->fd, (drm_magic_t) magic);
+}
+
+/*
+ * Set as the master of a DRM device.
+ */
+int gralloc_drm_set_master(struct gralloc_drm_t *drm)
+{
+	LOGD("set master");
+	drmSetMaster(drm->fd);
+	drm->first_post = 1;
+
+	return 0;
+}
+
+/*
+ * Drop from the master of a DRM device.
+ */
+void gralloc_drm_drop_master(struct gralloc_drm_t *drm)
+{
+	drmDropMaster(drm->fd);
+}
+
+/*
+ * Create a buffer handle.
+ */
+static struct gralloc_drm_handle_t *create_bo_handle(int width,
+		int height, int format, int usage)
+{
+	struct gralloc_drm_handle_t *handle;
+
+	handle = calloc(1, sizeof(*handle));
+	if (!handle)
+		return NULL;
+
+	handle->base.version = sizeof(handle->base);
+	handle->base.numInts = GRALLOC_DRM_HANDLE_NUM_INTS;
+	handle->base.numFds = GRALLOC_DRM_HANDLE_NUM_FDS;
+
+	handle->magic = GRALLOC_DRM_HANDLE_MAGIC;
+	handle->width = width;
+	handle->height = height;
+	handle->format = format;
+	handle->usage = usage;
+
+	return handle;
+}
+
+/*
+ * Create a bo.
+ */
+struct gralloc_drm_bo_t *gralloc_drm_bo_create(struct gralloc_drm_t *drm,
+		int width, int height, int format, int usage)
+{
+	struct gralloc_drm_bo_t *bo;
+	struct gralloc_drm_handle_t *handle;
+
+	handle = create_bo_handle(width, height, format, usage);
+	if (!handle)
+		return NULL;
+
+	bo = drm->drv->alloc(drm->drv, handle);
+	if (!bo) {
+		free(handle);
+		return NULL;
+	}
+
+	bo->drm = drm;
+	bo->imported = 0;
+	bo->handle = handle;
+
+	handle->data_owner = gralloc_drm_get_pid();
+	handle->data = (int) bo;
+
+	return bo;
+}
+
+/*
+ * Validate a buffer handle and return the associated bo.
+ */
+struct gralloc_drm_bo_t *gralloc_drm_bo_validate(struct gralloc_drm_t *drm,
+		buffer_handle_t _handle)
+{
+	struct gralloc_drm_handle_t *handle = gralloc_drm_handle(_handle);
+
+	/* the buffer handle is passed to a new process */
+	if (handle && unlikely(handle->data_owner != gralloc_drm_pid)) {
+		struct gralloc_drm_bo_t *bo;
+
+		/* create the struct gralloc_drm_bo_t locally */
+		bo = drm->drv->alloc(drm->drv, handle);
+		if (bo) {
+			bo->drm = drm;
+			bo->imported = 1;
+			bo->handle = handle;
+		}
+
+		handle->data_owner = gralloc_drm_get_pid();
+		handle->data = (int) bo;
+	}
+
+	return (struct gralloc_drm_bo_t *) handle->data;
+}
+
+/*
+ * Destroy a bo.
+ */
+void gralloc_drm_bo_destroy(struct gralloc_drm_bo_t *bo)
+{
+	struct gralloc_drm_handle_t *handle = bo->handle;
+	int imported = bo->imported;
+
+	bo->drm->drv->free(bo->drm->drv, bo);
+	if (imported) {
+		handle->data_owner = 0;
+		handle->data = 0;
+	}
+	else {
+		free(handle);
+	}
+}
+
+/*
+ * Map a bo for CPU access.
+ */
+int gralloc_drm_bo_map(struct gralloc_drm_bo_t *bo,
+		int x, int y, int w, int h,
+		int enable_write, void **addr)
+{
+	return bo->drm->drv->map(bo->drm->drv, bo,
+			x, y, w, h, enable_write, addr);
+}
+
+/*
+ * Unmap a bo.
+ */
+void gralloc_drm_bo_unmap(struct gralloc_drm_bo_t *bo)
+{
+	bo->drm->drv->unmap(bo->drm->drv, bo);
+}
+
+/*
+ * Get the buffer handle and stride of a bo.
+ */
+buffer_handle_t gralloc_drm_bo_get_handle(struct gralloc_drm_bo_t *bo, int *stride)
+{
+	if (stride)
+		*stride = bo->handle->stride;
+	return &bo->handle->base;
+}