freedreno: add support for msm drm

This adds support for the "msm" backend, using the upstream msm drm/kms
driver.

Signed-off-by: Rob Clark <robclark@freedesktop.org>

1 files changed, 141 insertions, 0 deletions

diff --git a/freedreno/msm/msm_bo.c b/freedreno/msm/msm_bo.c
new file mode 100644
index 00000000..57d87256
--- /dev/null
+++ b/freedreno/msm/msm_bo.c
@@ -0,0 +1,141 @@
+/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
+
+/*
+ * Copyright (C) 2013 Rob Clark <robclark@freedesktop.org>
+ *
+ * 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 (including the next
+ * paragraph) 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.
+ *
+ * Authors:
+ *    Rob Clark <robclark@freedesktop.org>
+ */
+
+#include "msm_priv.h"
+
+static int bo_allocate(struct msm_bo *msm_bo)
+{
+	struct fd_bo *bo = &msm_bo->base;
+	if (!msm_bo->offset) {
+		struct drm_msm_gem_info req = {
+				.handle = bo->handle,
+		};
+		int ret;
+
+		/* if the buffer is already backed by pages then this
+		 * doesn't actually do anything (other than giving us
+		 * the offset)
+		 */
+		ret = drmCommandWriteRead(bo->dev->fd, DRM_MSM_GEM_INFO,
+				&req, sizeof(req));
+		if (ret) {
+			ERROR_MSG("alloc failed: %s", strerror(errno));
+			return ret;
+		}
+
+		msm_bo->offset = req.offset;
+	}
+
+	return 0;
+}
+
+static int msm_bo_offset(struct fd_bo *bo, uint64_t *offset)
+{
+	struct msm_bo *msm_bo = to_msm_bo(bo);
+	int ret = bo_allocate(msm_bo);
+	if (ret)
+		return ret;
+	*offset = msm_bo->offset;
+	return 0;
+}
+
+static int msm_bo_cpu_prep(struct fd_bo *bo, struct fd_pipe *pipe, uint32_t op)
+{
+	struct drm_msm_gem_cpu_prep req = {
+			.handle = bo->handle,
+			.op = op,
+	};
+
+	get_abs_timeout(&req.timeout, 5000);
+
+	return drmCommandWrite(bo->dev->fd, DRM_MSM_GEM_CPU_PREP, &req, sizeof(req));
+}
+
+static void msm_bo_cpu_fini(struct fd_bo *bo)
+{
+	struct drm_msm_gem_cpu_fini req = {
+			.handle = bo->handle,
+	};
+
+	drmCommandWrite(bo->dev->fd, DRM_MSM_GEM_CPU_FINI, &req, sizeof(req));
+}
+
+static void msm_bo_destroy(struct fd_bo *bo)
+{
+	struct msm_bo *msm_bo = to_msm_bo(bo);
+	free(msm_bo);
+
+}
+
+static struct fd_bo_funcs funcs = {
+		.offset = msm_bo_offset,
+		.cpu_prep = msm_bo_cpu_prep,
+		.cpu_fini = msm_bo_cpu_fini,
+		.destroy = msm_bo_destroy,
+};
+
+/* allocate a buffer handle: */
+int msm_bo_new_handle(struct fd_device *dev,
+		uint32_t size, uint32_t flags, uint32_t *handle)
+{
+	struct drm_msm_gem_new req = {
+			.size = size,
+			.flags = MSM_BO_WC,  // TODO figure out proper flags..
+	};
+	int ret;
+
+	ret = drmCommandWriteRead(dev->fd, DRM_MSM_GEM_NEW,
+			&req, sizeof(req));
+	if (ret)
+		return ret;
+
+	*handle = req.handle;
+
+	return 0;
+}
+
+/* allocate a new buffer object */
+struct fd_bo * msm_bo_from_handle(struct fd_device *dev,
+		uint32_t size, uint32_t handle)
+{
+	struct msm_bo *msm_bo;
+	struct fd_bo *bo;
+	unsigned i;
+
+	msm_bo = calloc(1, sizeof(*msm_bo));
+	if (!msm_bo)
+		return NULL;
+
+	bo = &msm_bo->base;
+	bo->funcs = &funcs;
+
+	for (i = 0; i < ARRAY_SIZE(msm_bo->list); i++)
+		list_inithead(&msm_bo->list[i]);
+
+	return bo;
+}