1 files changed, 311 insertions, 0 deletions
diff --git a/freedreno/kgsl/kgsl_bo.c b/freedreno/kgsl/kgsl_bo.c
new file mode 100644
index 0000000..7a6af2f
--- /dev/null
+++ b/freedreno/kgsl/kgsl_bo.c
@@ -0,0 +1,311 @@
+/* -*- 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 "kgsl_priv.h"
+
+#include <linux/fb.h>
+
+static int set_memtype(struct fd_device *dev, uint32_t handle, uint32_t flags)
+{
+	struct drm_kgsl_gem_memtype req = {
+			.handle = handle,
+			.type = flags & DRM_FREEDRENO_GEM_TYPE_MEM_MASK,
+	};
+
+	return drmCommandWrite(dev->fd, DRM_KGSL_GEM_SETMEMTYPE,
+			&req, sizeof(req));
+}
+
+static int bo_alloc(struct kgsl_bo *kgsl_bo)
+{
+	struct fd_bo *bo = &kgsl_bo->base;
+	if (!kgsl_bo->offset) {
+		struct drm_kgsl_gem_alloc 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_KGSL_GEM_ALLOC,
+				&req, sizeof(req));
+		if (ret) {
+			ERROR_MSG("alloc failed: %s", strerror(errno));
+			return ret;
+		}
+
+		kgsl_bo->offset = req.offset;
+	}
+
+	return 0;
+}
+
+static int kgsl_bo_offset(struct fd_bo *bo, uint64_t *offset)
+{
+	struct kgsl_bo *kgsl_bo = to_kgsl_bo(bo);
+	int ret = bo_alloc(kgsl_bo);
+	if (ret)
+		return ret;
+	*offset = kgsl_bo->offset;
+	return 0;
+}
+
+static int kgsl_bo_cpu_prep(struct fd_bo *bo, struct fd_pipe *pipe, uint32_t op)
+{
+	uint32_t timestamp = kgsl_bo_get_timestamp(to_kgsl_bo(bo));
+
+	if (op & DRM_FREEDRENO_PREP_NOSYNC) {
+		uint32_t current;
+		int ret;
+
+		/* special case for is_idle().. we can't really handle that
+		 * properly in kgsl (perhaps we need a way to just disable
+		 * the bo-cache for kgsl?)
+		 */
+		if (!pipe)
+			return -EBUSY;
+
+		ret = kgsl_pipe_timestamp(to_kgsl_pipe(pipe), &current);
+		if (ret)
+			return ret;
+
+		if (timestamp > current)
+			return -EBUSY;
+
+		return 0;
+	}
+
+	if (timestamp)
+		fd_pipe_wait(pipe, timestamp);
+
+	return 0;
+}
+
+static void kgsl_bo_cpu_fini(struct fd_bo *bo)
+{
+}
+
+static int kgsl_bo_madvise(struct fd_bo *bo, int willneed)
+{
+	return willneed; /* not supported by kgsl */
+}
+
+static void kgsl_bo_destroy(struct fd_bo *bo)
+{
+	struct kgsl_bo *kgsl_bo = to_kgsl_bo(bo);
+	free(kgsl_bo);
+
+}
+
+static const struct fd_bo_funcs funcs = {
+		.offset = kgsl_bo_offset,
+		.cpu_prep = kgsl_bo_cpu_prep,
+		.cpu_fini = kgsl_bo_cpu_fini,
+		.madvise = kgsl_bo_madvise,
+		.destroy = kgsl_bo_destroy,
+};
+
+/* allocate a buffer handle: */
+drm_private int kgsl_bo_new_handle(struct fd_device *dev,
+		uint32_t size, uint32_t flags, uint32_t *handle)
+{
+	struct drm_kgsl_gem_create req = {
+			.size = size,
+	};
+	int ret;
+
+	ret = drmCommandWriteRead(dev->fd, DRM_KGSL_GEM_CREATE,
+			&req, sizeof(req));
+	if (ret)
+		return ret;
+
+	// TODO make flags match msm driver, since kgsl is legacy..
+	// translate flags in kgsl..
+
+	set_memtype(dev, req.handle, flags);
+
+	*handle = req.handle;
+
+	return 0;
+}
+
+/* allocate a new buffer object */
+drm_private struct fd_bo * kgsl_bo_from_handle(struct fd_device *dev,
+		uint32_t size, uint32_t handle)
+{
+	struct kgsl_bo *kgsl_bo;
+	struct fd_bo *bo;
+	unsigned i;
+
+	kgsl_bo = calloc(1, sizeof(*kgsl_bo));
+	if (!kgsl_bo)
+		return NULL;
+
+	bo = &kgsl_bo->base;
+	bo->funcs = &funcs;
+
+	for (i = 0; i < ARRAY_SIZE(kgsl_bo->list); i++)
+		list_inithead(&kgsl_bo->list[i]);
+
+	return bo;
+}
+
+drm_public struct fd_bo *
+fd_bo_from_fbdev(struct fd_pipe *pipe, int fbfd, uint32_t size)
+{
+	struct fd_bo *bo;
+
+	if (!is_kgsl_pipe(pipe))
+		return NULL;
+
+	bo = fd_bo_new(pipe->dev, 1, 0);
+
+	/* this is fugly, but works around a bug in the kernel..
+	 * priv->memdesc.size never gets set, so getbufinfo ioctl
+	 * thinks the buffer hasn't be allocate and fails
+	 */
+	if (bo) {
+		void *fbmem = drm_mmap(NULL, size, PROT_READ | PROT_WRITE,
+				MAP_SHARED, fbfd, 0);
+		struct kgsl_map_user_mem req = {
+				.memtype = KGSL_USER_MEM_TYPE_ADDR,
+				.len     = size,
+				.offset  = 0,
+				.hostptr = (unsigned long)fbmem,
+		};
+		struct kgsl_bo *kgsl_bo = to_kgsl_bo(bo);
+		int ret;
+
+		ret = ioctl(to_kgsl_pipe(pipe)->fd, IOCTL_KGSL_MAP_USER_MEM, &req);
+		if (ret) {
+			ERROR_MSG("mapping user mem failed: %s",
+					strerror(errno));
+			goto fail;
+		}
+		kgsl_bo->gpuaddr = req.gpuaddr;
+		bo->map = fbmem;
+	}
+
+	return bo;
+fail:
+	if (bo)
+		fd_bo_del(bo);
+	return NULL;
+}
+
+drm_private uint32_t kgsl_bo_gpuaddr(struct kgsl_bo *kgsl_bo, uint32_t offset)
+{
+	struct fd_bo *bo = &kgsl_bo->base;
+	if (!kgsl_bo->gpuaddr) {
+		struct drm_kgsl_gem_bufinfo req = {
+				.handle = bo->handle,
+		};
+		int ret;
+
+		ret = bo_alloc(kgsl_bo);
+		if (ret) {
+			return ret;
+		}
+
+		ret = drmCommandWriteRead(bo->dev->fd, DRM_KGSL_GEM_GET_BUFINFO,
+				&req, sizeof(req));
+		if (ret) {
+			ERROR_MSG("get bufinfo failed: %s", strerror(errno));
+			return 0;
+		}
+
+		kgsl_bo->gpuaddr = req.gpuaddr[0];
+	}
+	return kgsl_bo->gpuaddr + offset;
+}
+
+/*
+ * Super-cheezy way to synchronization between mesa and ddx..  the
+ * SET_ACTIVE ioctl gives us a way to stash a 32b # w/ a GEM bo, and
+ * GET_BUFINFO gives us a way to retrieve it.  We use this to stash
+ * the timestamp of the last ISSUEIBCMDS on the buffer.
+ *
+ * To avoid an obscene amount of syscalls, we:
+ *  1) Only set the timestamp for buffers w/ an flink name, ie.
+ *     only buffers shared across processes.  This is enough to
+ *     catch the DRI2 buffers.
+ *  2) Only set the timestamp for buffers submitted to the 3d ring
+ *     and only check the timestamps on buffers submitted to the
+ *     2d ring.  This should be enough to handle synchronizing of
+ *     presentation blit.  We could do synchronization in the other
+ *     direction too, but that would be problematic if we are using
+ *     the 3d ring from DDX, since client side wouldn't know this.
+ *
+ * The waiting on timestamp happens before flush, and setting of
+ * timestamp happens after flush.  It is transparent to the user
+ * of libdrm_freedreno as all the tracking of buffers happens via
+ * _emit_reloc()..
+ */
+
+drm_private void kgsl_bo_set_timestamp(struct kgsl_bo *kgsl_bo,
+		uint32_t timestamp)
+{
+	struct fd_bo *bo = &kgsl_bo->base;
+	if (bo->name) {
+		struct drm_kgsl_gem_active req = {
+				.handle = bo->handle,
+				.active = timestamp,
+		};
+		int ret;
+
+		ret = drmCommandWrite(bo->dev->fd, DRM_KGSL_GEM_SET_ACTIVE,
+				&req, sizeof(req));
+		if (ret) {
+			ERROR_MSG("set active failed: %s", strerror(errno));
+		}
+	}
+}
+
+drm_private uint32_t kgsl_bo_get_timestamp(struct kgsl_bo *kgsl_bo)
+{
+	struct fd_bo *bo = &kgsl_bo->base;
+	uint32_t timestamp = 0;
+	if (bo->name) {
+		struct drm_kgsl_gem_bufinfo req = {
+				.handle = bo->handle,
+		};
+		int ret;
+
+		ret = drmCommandWriteRead(bo->dev->fd, DRM_KGSL_GEM_GET_BUFINFO,
+				&req, sizeof(req));
+		if (ret) {
+			ERROR_MSG("get bufinfo failed: %s", strerror(errno));
+			return 0;
+		}
+
+		timestamp = req.active;
+	}
+	return timestamp;
+}