* [PATCH v2 1/2] drm/virtio: Refactor job submission code path
2023-03-19 16:08 [PATCH v2 0/2] Add sync object UAPI support to VirtIO-GPU driver Dmitry Osipenko
@ 2023-03-19 16:08 ` Dmitry Osipenko
2023-03-22 21:25 ` Rob Clark
2023-03-19 16:08 ` [PATCH v2 2/2] drm/virtio: Support sync objects Dmitry Osipenko
1 sibling, 1 reply; 5+ messages in thread
From: Dmitry Osipenko @ 2023-03-19 16:08 UTC (permalink / raw)
To: David Airlie, Gerd Hoffmann, Gurchetan Singh, Chia-I Wu,
Daniel Vetter, Rob Clark, Marek Olšák,
Pierre-Eric Pelloux-Prayer
Cc: kernel, linux-kernel, dri-devel, virtualization
Move virtio_gpu_execbuffer_ioctl() into separate virtgpu_submit.c file
and refactor the code along the way to ease addition of new features to
the ioctl.
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
---
drivers/gpu/drm/virtio/Makefile | 2 +-
drivers/gpu/drm/virtio/virtgpu_drv.h | 4 +
drivers/gpu/drm/virtio/virtgpu_ioctl.c | 182 ---------------
drivers/gpu/drm/virtio/virtgpu_submit.c | 298 ++++++++++++++++++++++++
4 files changed, 303 insertions(+), 183 deletions(-)
create mode 100644 drivers/gpu/drm/virtio/virtgpu_submit.c
diff --git a/drivers/gpu/drm/virtio/Makefile b/drivers/gpu/drm/virtio/Makefile
index b99fa4a73b68..d2e1788a8227 100644
--- a/drivers/gpu/drm/virtio/Makefile
+++ b/drivers/gpu/drm/virtio/Makefile
@@ -6,6 +6,6 @@
virtio-gpu-y := virtgpu_drv.o virtgpu_kms.o virtgpu_gem.o virtgpu_vram.o \
virtgpu_display.o virtgpu_vq.o \
virtgpu_fence.o virtgpu_object.o virtgpu_debugfs.o virtgpu_plane.o \
- virtgpu_ioctl.o virtgpu_prime.o virtgpu_trace_points.o
+ virtgpu_ioctl.o virtgpu_prime.o virtgpu_trace_points.o virtgpu_submit.o
obj-$(CONFIG_DRM_VIRTIO_GPU) += virtio-gpu.o
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h
index af6ffb696086..4126c384286b 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drv.h
+++ b/drivers/gpu/drm/virtio/virtgpu_drv.h
@@ -486,4 +486,8 @@ void virtio_gpu_vram_unmap_dma_buf(struct device *dev,
struct sg_table *sgt,
enum dma_data_direction dir);
+/* virtgpu_submit.c */
+int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file);
+
#endif
diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
index da45215a933d..b24b11f25197 100644
--- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c
+++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
@@ -38,36 +38,6 @@
VIRTGPU_BLOB_FLAG_USE_SHAREABLE | \
VIRTGPU_BLOB_FLAG_USE_CROSS_DEVICE)
-static int virtio_gpu_fence_event_create(struct drm_device *dev,
- struct drm_file *file,
- struct virtio_gpu_fence *fence,
- uint32_t ring_idx)
-{
- struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
- struct virtio_gpu_fence_event *e = NULL;
- int ret;
-
- if (!(vfpriv->ring_idx_mask & BIT_ULL(ring_idx)))
- return 0;
-
- e = kzalloc(sizeof(*e), GFP_KERNEL);
- if (!e)
- return -ENOMEM;
-
- e->event.type = VIRTGPU_EVENT_FENCE_SIGNALED;
- e->event.length = sizeof(e->event);
-
- ret = drm_event_reserve_init(dev, file, &e->base, &e->event);
- if (ret)
- goto free;
-
- fence->e = e;
- return 0;
-free:
- kfree(e);
- return ret;
-}
-
/* Must be called with &virtio_gpu_fpriv.struct_mutex held. */
static void virtio_gpu_create_context_locked(struct virtio_gpu_device *vgdev,
struct virtio_gpu_fpriv *vfpriv)
@@ -108,158 +78,6 @@ static int virtio_gpu_map_ioctl(struct drm_device *dev, void *data,
&virtio_gpu_map->offset);
}
-/*
- * Usage of execbuffer:
- * Relocations need to take into account the full VIRTIO_GPUDrawable size.
- * However, the command as passed from user space must *not* contain the initial
- * VIRTIO_GPUReleaseInfo struct (first XXX bytes)
- */
-static int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file)
-{
- struct drm_virtgpu_execbuffer *exbuf = data;
- struct virtio_gpu_device *vgdev = dev->dev_private;
- struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
- struct virtio_gpu_fence *out_fence;
- int ret;
- uint32_t *bo_handles = NULL;
- void __user *user_bo_handles = NULL;
- struct virtio_gpu_object_array *buflist = NULL;
- struct sync_file *sync_file;
- int out_fence_fd = -1;
- void *buf;
- uint64_t fence_ctx;
- uint32_t ring_idx;
-
- fence_ctx = vgdev->fence_drv.context;
- ring_idx = 0;
-
- if (vgdev->has_virgl_3d == false)
- return -ENOSYS;
-
- if ((exbuf->flags & ~VIRTGPU_EXECBUF_FLAGS))
- return -EINVAL;
-
- if ((exbuf->flags & VIRTGPU_EXECBUF_RING_IDX)) {
- if (exbuf->ring_idx >= vfpriv->num_rings)
- return -EINVAL;
-
- if (!vfpriv->base_fence_ctx)
- return -EINVAL;
-
- fence_ctx = vfpriv->base_fence_ctx;
- ring_idx = exbuf->ring_idx;
- }
-
- virtio_gpu_create_context(dev, file);
- if (exbuf->flags & VIRTGPU_EXECBUF_FENCE_FD_IN) {
- struct dma_fence *in_fence;
-
- in_fence = sync_file_get_fence(exbuf->fence_fd);
-
- if (!in_fence)
- return -EINVAL;
-
- /*
- * Wait if the fence is from a foreign context, or if the fence
- * array contains any fence from a foreign context.
- */
- ret = 0;
- if (!dma_fence_match_context(in_fence, fence_ctx + ring_idx))
- ret = dma_fence_wait(in_fence, true);
-
- dma_fence_put(in_fence);
- if (ret)
- return ret;
- }
-
- if (exbuf->flags & VIRTGPU_EXECBUF_FENCE_FD_OUT) {
- out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
- if (out_fence_fd < 0)
- return out_fence_fd;
- }
-
- if (exbuf->num_bo_handles) {
- bo_handles = kvmalloc_array(exbuf->num_bo_handles,
- sizeof(uint32_t), GFP_KERNEL);
- if (!bo_handles) {
- ret = -ENOMEM;
- goto out_unused_fd;
- }
-
- user_bo_handles = u64_to_user_ptr(exbuf->bo_handles);
- if (copy_from_user(bo_handles, user_bo_handles,
- exbuf->num_bo_handles * sizeof(uint32_t))) {
- ret = -EFAULT;
- goto out_unused_fd;
- }
-
- buflist = virtio_gpu_array_from_handles(file, bo_handles,
- exbuf->num_bo_handles);
- if (!buflist) {
- ret = -ENOENT;
- goto out_unused_fd;
- }
- kvfree(bo_handles);
- bo_handles = NULL;
- }
-
- buf = vmemdup_user(u64_to_user_ptr(exbuf->command), exbuf->size);
- if (IS_ERR(buf)) {
- ret = PTR_ERR(buf);
- goto out_unused_fd;
- }
-
- if (buflist) {
- ret = virtio_gpu_array_lock_resv(buflist);
- if (ret)
- goto out_memdup;
- }
-
- out_fence = virtio_gpu_fence_alloc(vgdev, fence_ctx, ring_idx);
- if(!out_fence) {
- ret = -ENOMEM;
- goto out_unresv;
- }
-
- ret = virtio_gpu_fence_event_create(dev, file, out_fence, ring_idx);
- if (ret)
- goto out_unresv;
-
- if (out_fence_fd >= 0) {
- sync_file = sync_file_create(&out_fence->f);
- if (!sync_file) {
- dma_fence_put(&out_fence->f);
- ret = -ENOMEM;
- goto out_unresv;
- }
-
- exbuf->fence_fd = out_fence_fd;
- fd_install(out_fence_fd, sync_file->file);
- }
-
- virtio_gpu_cmd_submit(vgdev, buf, exbuf->size,
- vfpriv->ctx_id, buflist, out_fence);
- dma_fence_put(&out_fence->f);
- virtio_gpu_notify(vgdev);
- return 0;
-
-out_unresv:
- if (buflist)
- virtio_gpu_array_unlock_resv(buflist);
-out_memdup:
- kvfree(buf);
-out_unused_fd:
- kvfree(bo_handles);
- if (buflist)
- virtio_gpu_array_put_free(buflist);
-
- if (out_fence_fd >= 0)
- put_unused_fd(out_fence_fd);
-
- return ret;
-}
-
static int virtio_gpu_getparam_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
diff --git a/drivers/gpu/drm/virtio/virtgpu_submit.c b/drivers/gpu/drm/virtio/virtgpu_submit.c
new file mode 100644
index 000000000000..a96f9d3285c7
--- /dev/null
+++ b/drivers/gpu/drm/virtio/virtgpu_submit.c
@@ -0,0 +1,298 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright (C) 2015 Red Hat, Inc.
+ * All Rights Reserved.
+ *
+ * Authors:
+ * Dave Airlie
+ * Alon Levy
+ */
+
+#include <linux/file.h>
+#include <linux/sync_file.h>
+#include <linux/uaccess.h>
+
+#include <drm/drm_file.h>
+#include <drm/virtgpu_drm.h>
+
+#include "virtgpu_drv.h"
+
+struct virtio_gpu_submit {
+ struct virtio_gpu_object_array *buflist;
+ struct drm_virtgpu_execbuffer *exbuf;
+ struct virtio_gpu_fence *out_fence;
+ struct virtio_gpu_fpriv *vfpriv;
+ struct virtio_gpu_device *vgdev;
+ struct drm_file *file;
+ uint64_t fence_ctx;
+ uint32_t ring_idx;
+ int out_fence_fd;
+ void *buf;
+};
+
+static int virtio_gpu_do_fence_wait(struct virtio_gpu_submit *submit,
+ struct dma_fence *dma_fence)
+{
+ uint32_t context = submit->fence_ctx + submit->ring_idx;
+
+ if (dma_fence_match_context(dma_fence, context))
+ return 0;
+
+ return dma_fence_wait(dma_fence, true);
+}
+
+static int virtio_gpu_dma_fence_wait(struct virtio_gpu_submit *submit,
+ struct dma_fence *fence)
+{
+ struct dma_fence *itr;
+ int idx, err;
+
+ dma_fence_array_for_each(itr, idx, fence) {
+ err = virtio_gpu_do_fence_wait(submit, itr);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int virtio_gpu_fence_event_create(struct drm_device *dev,
+ struct drm_file *file,
+ struct virtio_gpu_fence *fence,
+ uint32_t ring_idx)
+{
+ struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
+ struct virtio_gpu_fence_event *e = NULL;
+ int ret;
+
+ if (!(vfpriv->ring_idx_mask & BIT_ULL(ring_idx)))
+ return 0;
+
+ e = kzalloc(sizeof(*e), GFP_KERNEL);
+ if (!e)
+ return -ENOMEM;
+
+ e->event.type = VIRTGPU_EVENT_FENCE_SIGNALED;
+ e->event.length = sizeof(e->event);
+
+ ret = drm_event_reserve_init(dev, file, &e->base, &e->event);
+ if (ret) {
+ kfree(e);
+ return ret;
+ }
+
+ fence->e = e;
+
+ return 0;
+}
+
+static int virtio_gpu_init_submit_buflist(struct virtio_gpu_submit *submit)
+{
+ struct drm_virtgpu_execbuffer *exbuf = submit->exbuf;
+ uint32_t *bo_handles;
+
+ if (!exbuf->num_bo_handles)
+ return 0;
+
+ bo_handles = kvmalloc_array(exbuf->num_bo_handles, sizeof(uint32_t),
+ GFP_KERNEL);
+ if (!bo_handles)
+ return -ENOMEM;
+
+ if (copy_from_user(bo_handles, u64_to_user_ptr(exbuf->bo_handles),
+ exbuf->num_bo_handles * sizeof(uint32_t))) {
+ kvfree(bo_handles);
+ return -EFAULT;
+ }
+
+ submit->buflist = virtio_gpu_array_from_handles(submit->file, bo_handles,
+ exbuf->num_bo_handles);
+ if (!submit->buflist) {
+ kvfree(bo_handles);
+ return -ENOENT;
+ }
+
+ kvfree(bo_handles);
+
+ return 0;
+}
+
+static void virtio_gpu_cleanup_submit(struct virtio_gpu_submit *submit)
+{
+ if (!IS_ERR(submit->buf))
+ kvfree(submit->buf);
+
+ if (submit->buflist)
+ virtio_gpu_array_put_free(submit->buflist);
+
+ if (submit->out_fence_fd >= 0)
+ put_unused_fd(submit->out_fence_fd);
+}
+
+static void virtio_gpu_submit(struct virtio_gpu_submit *submit)
+{
+ virtio_gpu_cmd_submit(submit->vgdev, submit->buf, submit->exbuf->size,
+ submit->vfpriv->ctx_id, submit->buflist,
+ submit->out_fence);
+ virtio_gpu_notify(submit->vgdev);
+
+ submit->buf = NULL;
+ submit->buflist = NULL;
+ submit->out_fence_fd = -1;
+}
+
+static int virtio_gpu_init_submit(struct virtio_gpu_submit *submit,
+ struct drm_virtgpu_execbuffer *exbuf,
+ struct drm_device *dev,
+ struct drm_file *file,
+ uint64_t fence_ctx, uint32_t ring_idx)
+{
+ struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
+ struct virtio_gpu_device *vgdev = dev->dev_private;
+ struct virtio_gpu_fence *out_fence;
+ int err;
+
+ memset(submit, 0, sizeof(*submit));
+
+ out_fence = virtio_gpu_fence_alloc(vgdev, fence_ctx, ring_idx);
+ if (!out_fence)
+ return -ENOMEM;
+
+ err = virtio_gpu_fence_event_create(dev, file, out_fence, ring_idx);
+ if (err) {
+ dma_fence_put(&out_fence->f);
+ return err;
+ }
+
+ submit->out_fence = out_fence;
+ submit->fence_ctx = fence_ctx;
+ submit->ring_idx = ring_idx;
+ submit->out_fence_fd = -1;
+ submit->vfpriv = vfpriv;
+ submit->vgdev = vgdev;
+ submit->exbuf = exbuf;
+ submit->file = file;
+
+ err = virtio_gpu_init_submit_buflist(submit);
+ if (err)
+ return err;
+
+ submit->buf = vmemdup_user(u64_to_user_ptr(exbuf->command), exbuf->size);
+ if (IS_ERR(submit->buf))
+ return PTR_ERR(submit->buf);
+
+ if (exbuf->flags & VIRTGPU_EXECBUF_FENCE_FD_OUT) {
+ err = get_unused_fd_flags(O_CLOEXEC);
+ if (err < 0)
+ return err;
+
+ submit->out_fence_fd = err;
+ }
+
+ return 0;
+}
+
+static int virtio_gpu_wait_in_fence(struct virtio_gpu_submit *submit)
+{
+ int ret = 0;
+
+ if (submit->exbuf->flags & VIRTGPU_EXECBUF_FENCE_FD_IN) {
+ struct dma_fence *in_fence =
+ sync_file_get_fence(submit->exbuf->fence_fd);
+ if (!in_fence)
+ return -EINVAL;
+
+ /*
+ * Wait if the fence is from a foreign context, or if the fence
+ * array contains any fence from a foreign context.
+ */
+ ret = virtio_gpu_dma_fence_wait(submit, in_fence);
+
+ dma_fence_put(in_fence);
+ }
+
+ return ret;
+}
+
+static int virtio_gpu_install_out_fence_fd(struct virtio_gpu_submit *submit)
+{
+ if (submit->out_fence_fd >= 0) {
+ struct sync_file *sync_file =
+ sync_file_create(&submit->out_fence->f);
+ if (!sync_file)
+ return -ENOMEM;
+
+ submit->exbuf->fence_fd = submit->out_fence_fd;
+ fd_install(submit->out_fence_fd, sync_file->file);
+ }
+
+ return 0;
+}
+
+static int virtio_gpu_lock_buflist(struct virtio_gpu_submit *submit)
+{
+ if (submit->buflist)
+ return virtio_gpu_array_lock_resv(submit->buflist);
+
+ return 0;
+}
+
+/*
+ * Usage of execbuffer:
+ * Relocations need to take into account the full VIRTIO_GPUDrawable size.
+ * However, the command as passed from user space must *not* contain the initial
+ * VIRTIO_GPUReleaseInfo struct (first XXX bytes)
+ */
+int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file)
+{
+ struct virtio_gpu_device *vgdev = dev->dev_private;
+ struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
+ uint64_t fence_ctx = vgdev->fence_drv.context;
+ struct drm_virtgpu_execbuffer *exbuf = data;
+ struct virtio_gpu_submit submit;
+ uint32_t ring_idx = 0;
+ int ret = -EINVAL;
+
+ if (vgdev->has_virgl_3d == false)
+ return -ENOSYS;
+
+ if ((exbuf->flags & ~VIRTGPU_EXECBUF_FLAGS))
+ return ret;
+
+ if ((exbuf->flags & VIRTGPU_EXECBUF_RING_IDX)) {
+ if (exbuf->ring_idx >= vfpriv->num_rings)
+ return ret;
+
+ if (!vfpriv->base_fence_ctx)
+ return ret;
+
+ fence_ctx = vfpriv->base_fence_ctx;
+ ring_idx = exbuf->ring_idx;
+ }
+
+ virtio_gpu_create_context(dev, file);
+
+ ret = virtio_gpu_init_submit(&submit, exbuf, dev, file,
+ fence_ctx, ring_idx);
+ if (ret)
+ goto cleanup;
+
+ ret = virtio_gpu_wait_in_fence(&submit);
+ if (ret)
+ goto cleanup;
+
+ ret = virtio_gpu_install_out_fence_fd(&submit);
+ if (ret)
+ goto cleanup;
+
+ ret = virtio_gpu_lock_buflist(&submit);
+ if (ret)
+ goto cleanup;
+
+ virtio_gpu_submit(&submit);
+cleanup:
+ virtio_gpu_cleanup_submit(&submit);
+
+ return ret;
+}
--
2.39.2
^ permalink raw reply related [flat|nested] 5+ messages in thread* [PATCH v2 2/2] drm/virtio: Support sync objects
2023-03-19 16:08 [PATCH v2 0/2] Add sync object UAPI support to VirtIO-GPU driver Dmitry Osipenko
2023-03-19 16:08 ` [PATCH v2 1/2] drm/virtio: Refactor job submission code path Dmitry Osipenko
@ 2023-03-19 16:08 ` Dmitry Osipenko
1 sibling, 0 replies; 5+ messages in thread
From: Dmitry Osipenko @ 2023-03-19 16:08 UTC (permalink / raw)
To: David Airlie, Gerd Hoffmann, Gurchetan Singh, Chia-I Wu,
Daniel Vetter, Rob Clark, Marek Olšák,
Pierre-Eric Pelloux-Prayer
Cc: kernel, linux-kernel, dri-devel, virtualization
Add sync object DRM UAPI support to VirtIO-GPU driver. It's required
for enabling a full-featured Vulkan fencing by Venus and native context
VirtIO-GPU Mesa drivers.
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
---
drivers/gpu/drm/virtio/virtgpu_drv.c | 3 +-
drivers/gpu/drm/virtio/virtgpu_submit.c | 214 +++++++++++++++++++++++-
include/uapi/drm/virtgpu_drm.h | 16 +-
3 files changed, 230 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.c b/drivers/gpu/drm/virtio/virtgpu_drv.c
index add075681e18..a22155577152 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drv.c
+++ b/drivers/gpu/drm/virtio/virtgpu_drv.c
@@ -176,7 +176,8 @@ static const struct drm_driver driver = {
* If KMS is disabled DRIVER_MODESET and DRIVER_ATOMIC are masked
* out via drm_device::driver_features:
*/
- .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_RENDER | DRIVER_ATOMIC,
+ .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_RENDER | DRIVER_ATOMIC |
+ DRIVER_SYNCOBJ | DRIVER_SYNCOBJ_TIMELINE,
.open = virtio_gpu_driver_open,
.postclose = virtio_gpu_driver_postclose,
diff --git a/drivers/gpu/drm/virtio/virtgpu_submit.c b/drivers/gpu/drm/virtio/virtgpu_submit.c
index a96f9d3285c7..eb29c4e72dd1 100644
--- a/drivers/gpu/drm/virtio/virtgpu_submit.c
+++ b/drivers/gpu/drm/virtio/virtgpu_submit.c
@@ -13,11 +13,26 @@
#include <linux/uaccess.h>
#include <drm/drm_file.h>
+#include <drm/drm_syncobj.h>
#include <drm/virtgpu_drm.h>
#include "virtgpu_drv.h"
+struct virtio_gpu_submit_post_dep {
+ struct drm_syncobj *syncobj;
+ struct dma_fence_chain *chain;
+ uint64_t point;
+};
+
struct virtio_gpu_submit {
+ struct virtio_gpu_submit_post_dep *post_deps;
+ unsigned int num_out_syncobjs;
+
+ struct drm_syncobj **in_syncobjs;
+ unsigned int num_in_syncobjs;
+ uint64_t *in_fence_ids;
+ unsigned int num_in_fence_ids;
+
struct virtio_gpu_object_array *buflist;
struct drm_virtgpu_execbuffer *exbuf;
struct virtio_gpu_fence *out_fence;
@@ -33,9 +48,10 @@ struct virtio_gpu_submit {
static int virtio_gpu_do_fence_wait(struct virtio_gpu_submit *submit,
struct dma_fence *dma_fence)
{
+ struct dma_fence *in_fence = dma_fence_chain_contained(dma_fence);
uint32_t context = submit->fence_ctx + submit->ring_idx;
- if (dma_fence_match_context(dma_fence, context))
+ if (dma_fence_match_context(in_fence, context))
return 0;
return dma_fence_wait(dma_fence, true);
@@ -56,6 +72,186 @@ static int virtio_gpu_dma_fence_wait(struct virtio_gpu_submit *submit,
return 0;
}
+static void virtio_gpu_free_syncobjs(struct drm_syncobj **syncobjs,
+ uint32_t nr_syncobjs)
+{
+ uint32_t i = nr_syncobjs;
+
+ while (syncobjs && i--) {
+ if (syncobjs[i])
+ drm_syncobj_put(syncobjs[i]);
+ }
+
+ kfree(syncobjs);
+}
+
+static int
+virtio_gpu_parse_deps(struct virtio_gpu_submit *submit)
+{
+ struct drm_virtgpu_execbuffer *exbuf = submit->exbuf;
+ struct drm_virtgpu_execbuffer_syncobj syncobj_desc;
+ size_t syncobj_stride = exbuf->syncobj_stride;
+ struct drm_syncobj **syncobjs;
+ int ret = 0, i;
+
+ if (!submit->num_in_syncobjs)
+ return 0;
+
+ syncobjs = kcalloc(submit->num_in_syncobjs, sizeof(*syncobjs),
+ GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
+ if (!syncobjs)
+ return -ENOMEM;
+
+ for (i = 0; i < submit->num_in_syncobjs; i++) {
+ uint64_t address = exbuf->in_syncobjs + i * syncobj_stride;
+ struct dma_fence *fence;
+
+ if (copy_from_user(&syncobj_desc,
+ u64_to_user_ptr(address),
+ min(syncobj_stride, sizeof(syncobj_desc)))) {
+ ret = -EFAULT;
+ break;
+ }
+
+ if (syncobj_desc.flags & ~VIRTGPU_EXECBUF_SYNCOBJ_FLAGS) {
+ ret = -EINVAL;
+ break;
+ }
+
+ ret = drm_syncobj_find_fence(submit->file, syncobj_desc.handle,
+ syncobj_desc.point, 0, &fence);
+ if (ret)
+ break;
+
+ ret = virtio_gpu_dma_fence_wait(submit, fence);
+
+ dma_fence_put(fence);
+ if (ret)
+ break;
+
+ if (syncobj_desc.flags & VIRTGPU_EXECBUF_SYNCOBJ_RESET) {
+ syncobjs[i] =
+ drm_syncobj_find(submit->file, syncobj_desc.handle);
+ if (!syncobjs[i]) {
+ ret = -EINVAL;
+ break;
+ }
+ }
+ }
+
+ if (ret) {
+ virtio_gpu_free_syncobjs(syncobjs, i);
+ return ret;
+ }
+
+ submit->in_syncobjs = syncobjs;
+
+ return ret;
+}
+
+static void virtio_gpu_reset_syncobjs(struct drm_syncobj **syncobjs,
+ uint32_t nr_syncobjs)
+{
+ uint32_t i;
+
+ for (i = 0; syncobjs && i < nr_syncobjs; i++) {
+ if (syncobjs[i])
+ drm_syncobj_replace_fence(syncobjs[i], NULL);
+ }
+}
+
+static void
+virtio_gpu_free_post_deps(struct virtio_gpu_submit_post_dep *post_deps,
+ uint32_t nr_syncobjs)
+{
+ uint32_t i = nr_syncobjs;
+
+ while (post_deps && i--) {
+ kfree(post_deps[i].chain);
+ drm_syncobj_put(post_deps[i].syncobj);
+ }
+
+ kfree(post_deps);
+}
+
+static int virtio_gpu_parse_post_deps(struct virtio_gpu_submit *submit)
+{
+ struct drm_virtgpu_execbuffer *exbuf = submit->exbuf;
+ struct drm_virtgpu_execbuffer_syncobj syncobj_desc;
+ struct virtio_gpu_submit_post_dep *post_deps;
+ size_t syncobj_stride = exbuf->syncobj_stride;
+ int ret = 0, i;
+
+ if (!submit->num_out_syncobjs)
+ return 0;
+
+ post_deps = kcalloc(submit->num_out_syncobjs, sizeof(*post_deps),
+ GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
+ if (!post_deps)
+ return -ENOMEM;
+
+ for (i = 0; i < submit->num_out_syncobjs; i++) {
+ uint64_t address = exbuf->out_syncobjs + i * syncobj_stride;
+
+ if (copy_from_user(&syncobj_desc,
+ u64_to_user_ptr(address),
+ min(syncobj_stride, sizeof(syncobj_desc)))) {
+ ret = -EFAULT;
+ break;
+ }
+
+ post_deps[i].point = syncobj_desc.point;
+
+ if (syncobj_desc.flags) {
+ ret = -EINVAL;
+ break;
+ }
+
+ if (syncobj_desc.point) {
+ post_deps[i].chain = dma_fence_chain_alloc();
+ if (!post_deps[i].chain) {
+ ret = -ENOMEM;
+ break;
+ }
+ }
+
+ post_deps[i].syncobj =
+ drm_syncobj_find(submit->file, syncobj_desc.handle);
+ if (!post_deps[i].syncobj) {
+ ret = -EINVAL;
+ break;
+ }
+ }
+
+ if (ret) {
+ virtio_gpu_free_post_deps(post_deps, i);
+ return ret;
+ }
+
+ submit->post_deps = post_deps;
+
+ return 0;
+}
+
+static void
+virtio_gpu_process_post_deps(struct virtio_gpu_submit *submit)
+{
+ struct virtio_gpu_submit_post_dep *post_deps = submit->post_deps;
+ struct dma_fence *fence = &submit->out_fence->f;
+ uint32_t i;
+
+ for (i = 0; post_deps && i < submit->num_out_syncobjs; i++) {
+ if (post_deps[i].chain) {
+ drm_syncobj_add_point(post_deps[i].syncobj,
+ post_deps[i].chain,
+ fence, post_deps[i].point);
+ post_deps[i].chain = NULL;
+ } else {
+ drm_syncobj_replace_fence(post_deps[i].syncobj, fence);
+ }
+ }
+}
+
static int virtio_gpu_fence_event_create(struct drm_device *dev,
struct drm_file *file,
struct virtio_gpu_fence *fence,
@@ -119,6 +315,11 @@ static int virtio_gpu_init_submit_buflist(struct virtio_gpu_submit *submit)
static void virtio_gpu_cleanup_submit(struct virtio_gpu_submit *submit)
{
+ virtio_gpu_reset_syncobjs(submit->in_syncobjs, submit->num_in_syncobjs);
+ virtio_gpu_free_syncobjs(submit->in_syncobjs, submit->num_in_syncobjs);
+ virtio_gpu_free_post_deps(submit->post_deps, submit->num_out_syncobjs);
+ kfree(submit->in_fence_ids);
+
if (!IS_ERR(submit->buf))
kvfree(submit->buf);
@@ -164,6 +365,8 @@ static int virtio_gpu_init_submit(struct virtio_gpu_submit *submit,
return err;
}
+ submit->num_out_syncobjs = exbuf->num_out_syncobjs;
+ submit->num_in_syncobjs = exbuf->num_in_syncobjs;
submit->out_fence = out_fence;
submit->fence_ctx = fence_ctx;
submit->ring_idx = ring_idx;
@@ -282,6 +485,14 @@ int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data,
if (ret)
goto cleanup;
+ ret = virtio_gpu_parse_deps(&submit);
+ if (ret)
+ goto cleanup;
+
+ ret = virtio_gpu_parse_post_deps(&submit);
+ if (ret)
+ goto cleanup;
+
ret = virtio_gpu_install_out_fence_fd(&submit);
if (ret)
goto cleanup;
@@ -291,6 +502,7 @@ int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data,
goto cleanup;
virtio_gpu_submit(&submit);
+ virtio_gpu_process_post_deps(&submit);
cleanup:
virtio_gpu_cleanup_submit(&submit);
diff --git a/include/uapi/drm/virtgpu_drm.h b/include/uapi/drm/virtgpu_drm.h
index 7b158fcb02b4..ce4948aacafd 100644
--- a/include/uapi/drm/virtgpu_drm.h
+++ b/include/uapi/drm/virtgpu_drm.h
@@ -64,6 +64,16 @@ struct drm_virtgpu_map {
__u32 pad;
};
+#define VIRTGPU_EXECBUF_SYNCOBJ_RESET 0x01
+#define VIRTGPU_EXECBUF_SYNCOBJ_FLAGS ( \
+ VIRTGPU_EXECBUF_SYNCOBJ_RESET | \
+ 0)
+struct drm_virtgpu_execbuffer_syncobj {
+ __u32 handle;
+ __u32 flags;
+ __u64 point;
+};
+
/* fence_fd is modified on success if VIRTGPU_EXECBUF_FENCE_FD_OUT flag is set. */
struct drm_virtgpu_execbuffer {
__u32 flags;
@@ -73,7 +83,11 @@ struct drm_virtgpu_execbuffer {
__u32 num_bo_handles;
__s32 fence_fd; /* in/out fence fd (see VIRTGPU_EXECBUF_FENCE_FD_IN/OUT) */
__u32 ring_idx; /* command ring index (see VIRTGPU_EXECBUF_RING_IDX) */
- __u32 pad;
+ __u32 syncobj_stride;
+ __u32 num_in_syncobjs;
+ __u32 num_out_syncobjs;
+ __u64 in_syncobjs;
+ __u64 out_syncobjs;
};
#define VIRTGPU_PARAM_3D_FEATURES 1 /* do we have 3D features in the hw */
--
2.39.2
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