mirror of
https://github.com/torvalds/linux.git
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drm/i915: add syncobj timeline support
Introduces a new parameters to execbuf so that we can specify syncobj
handles as well as timeline points.
v2: Reuse i915_user_extension_fn
v3: Check that the chained extension is only present once (Chris)
v4: Check that dma_fence_chain_find_seqno returns a non NULL fence (Lionel)
v5: Use BIT_ULL (Chris)
v6: Fix issue with already signaled timeline points,
dma_fence_chain_find_seqno() setting fence to NULL (Chris)
v7: Report ENOENT with invalid syncobj handle (Lionel)
v8: Check for out of order timeline point insertion (Chris)
v9: After explanations on
https://lists.freedesktop.org/archives/dri-devel/2019-August/229287.html
drop the ordering check from v8 (Lionel)
v10: Set first extension enum item to 1 (Jason)
v11: Rebase
v12: Allow multiple extension nodes of timeline syncobj (Chris)
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Co-authored-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> (v11)
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200804085954.350343-3-lionel.g.landwerlin@intel.com
Link: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/2901
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
Lionel Landwerlin
Rodrigo Vivi
parent
cda9edd024
commit
13149e8baf
@ -223,6 +223,13 @@ struct eb_vma_array {
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* the batchbuffer in trusted mode, otherwise the ioctl is rejected.
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*/
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struct eb_fence {
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struct drm_syncobj *syncobj; /* Use with ptr_mask_bits() */
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struct dma_fence *dma_fence;
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u64 value;
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struct dma_fence_chain *chain_fence;
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};
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struct i915_execbuffer {
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struct drm_i915_private *i915; /** i915 backpointer */
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struct drm_file *file; /** per-file lookup tables and limits */
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@ -283,12 +290,8 @@ struct i915_execbuffer {
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struct hlist_head *buckets; /** ht for relocation handles */
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struct eb_vma_array *array;
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struct i915_eb_fence {
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struct drm_syncobj *syncobj; /* Use with ptr_mask_bits() */
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} *fences;
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u32 n_fences;
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u64 extension_flags; /** Available extensions parameters */
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struct eb_fence *fences;
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unsigned long num_fences;
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};
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static inline bool eb_use_cmdparser(const struct i915_execbuffer *eb)
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@ -2210,77 +2213,222 @@ eb_pin_engine(struct i915_execbuffer *eb,
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}
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static void
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__free_fence_array(struct i915_eb_fence *fences, unsigned int n)
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__free_fence_array(struct eb_fence *fences, unsigned int n)
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{
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while (n--)
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while (n--) {
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drm_syncobj_put(ptr_mask_bits(fences[n].syncobj, 2));
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dma_fence_put(fences[n].dma_fence);
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kfree(fences[n].chain_fence);
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}
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kvfree(fences);
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}
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static int
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get_fence_array(struct drm_i915_gem_execbuffer2 *args,
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struct i915_execbuffer *eb)
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add_timeline_fence_array(struct i915_execbuffer *eb,
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const struct drm_i915_gem_execbuffer_ext_timeline_fences *timeline_fences)
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{
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const unsigned long nfences = args->num_cliprects;
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struct drm_i915_gem_exec_fence __user *user;
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struct i915_eb_fence *fences;
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unsigned long n;
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int err;
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struct drm_i915_gem_exec_fence __user *user_fences;
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u64 __user *user_values;
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struct eb_fence *f;
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u64 nfences;
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int err = 0;
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if (!(args->flags & I915_EXEC_FENCE_ARRAY))
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nfences = timeline_fences->fence_count;
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if (!nfences)
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return 0;
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/* Check multiplication overflow for access_ok() and kvmalloc_array() */
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BUILD_BUG_ON(sizeof(size_t) > sizeof(unsigned long));
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if (nfences > min_t(unsigned long,
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ULONG_MAX / sizeof(*user),
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SIZE_MAX / sizeof(*fences)))
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ULONG_MAX / sizeof(*user_fences),
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SIZE_MAX / sizeof(*f)) - eb->num_fences)
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return -EINVAL;
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user_fences = u64_to_user_ptr(timeline_fences->handles_ptr);
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if (!access_ok(user_fences, nfences * sizeof(*user_fences)))
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return -EFAULT;
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user_values = u64_to_user_ptr(timeline_fences->values_ptr);
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if (!access_ok(user_values, nfences * sizeof(*user_values)))
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return -EFAULT;
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f = krealloc(eb->fences,
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(eb->num_fences + nfences) * sizeof(*f),
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__GFP_NOWARN | GFP_KERNEL);
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if (!f)
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return -ENOMEM;
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eb->fences = f;
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f += eb->num_fences;
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BUILD_BUG_ON(~(ARCH_KMALLOC_MINALIGN - 1) &
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~__I915_EXEC_FENCE_UNKNOWN_FLAGS);
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while (nfences--) {
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struct drm_i915_gem_exec_fence user_fence;
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struct drm_syncobj *syncobj;
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struct dma_fence *fence = NULL;
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u64 point;
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if (__copy_from_user(&user_fence,
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user_fences++,
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sizeof(user_fence)))
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return -EFAULT;
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if (user_fence.flags & __I915_EXEC_FENCE_UNKNOWN_FLAGS)
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return -EINVAL;
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if (__get_user(point, user_values++))
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return -EFAULT;
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syncobj = drm_syncobj_find(eb->file, user_fence.handle);
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if (!syncobj) {
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DRM_DEBUG("Invalid syncobj handle provided\n");
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return -ENOENT;
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}
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fence = drm_syncobj_fence_get(syncobj);
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if (!fence && user_fence.flags &&
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!(user_fence.flags & I915_EXEC_FENCE_SIGNAL)) {
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DRM_DEBUG("Syncobj handle has no fence\n");
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drm_syncobj_put(syncobj);
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return -EINVAL;
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}
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if (fence)
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err = dma_fence_chain_find_seqno(&fence, point);
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if (err && !(user_fence.flags & I915_EXEC_FENCE_SIGNAL)) {
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DRM_DEBUG("Syncobj handle missing requested point %llu\n", point);
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drm_syncobj_put(syncobj);
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return err;
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}
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/*
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* A point might have been signaled already and
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* garbage collected from the timeline. In this case
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* just ignore the point and carry on.
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*/
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if (!fence && !(user_fence.flags & I915_EXEC_FENCE_SIGNAL)) {
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drm_syncobj_put(syncobj);
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continue;
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}
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/*
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* For timeline syncobjs we need to preallocate chains for
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* later signaling.
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*/
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if (point != 0 && user_fence.flags & I915_EXEC_FENCE_SIGNAL) {
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/*
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* Waiting and signaling the same point (when point !=
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* 0) would break the timeline.
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*/
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if (user_fence.flags & I915_EXEC_FENCE_WAIT) {
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DRM_DEBUG("Trying to wait & signal the same timeline point.\n");
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dma_fence_put(fence);
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drm_syncobj_put(syncobj);
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return -EINVAL;
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}
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f->chain_fence =
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kmalloc(sizeof(*f->chain_fence),
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GFP_KERNEL);
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if (!f->chain_fence) {
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drm_syncobj_put(syncobj);
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dma_fence_put(fence);
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return -ENOMEM;
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}
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} else {
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f->chain_fence = NULL;
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}
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f->syncobj = ptr_pack_bits(syncobj, user_fence.flags, 2);
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f->dma_fence = fence;
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f->value = point;
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f++;
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eb->num_fences++;
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}
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return 0;
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}
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static int add_fence_array(struct i915_execbuffer *eb)
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{
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struct drm_i915_gem_execbuffer2 *args = eb->args;
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struct drm_i915_gem_exec_fence __user *user;
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unsigned long num_fences = args->num_cliprects;
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struct eb_fence *f;
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if (!(args->flags & I915_EXEC_FENCE_ARRAY))
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return 0;
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if (!num_fences)
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return 0;
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/* Check multiplication overflow for access_ok() and kvmalloc_array() */
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BUILD_BUG_ON(sizeof(size_t) > sizeof(unsigned long));
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if (num_fences > min_t(unsigned long,
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ULONG_MAX / sizeof(*user),
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SIZE_MAX / sizeof(*f) - eb->num_fences))
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return -EINVAL;
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user = u64_to_user_ptr(args->cliprects_ptr);
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if (!access_ok(user, nfences * sizeof(*user)))
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if (!access_ok(user, num_fences * sizeof(*user)))
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return -EFAULT;
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fences = kvmalloc_array(nfences, sizeof(*fences),
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__GFP_NOWARN | GFP_KERNEL);
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if (!fences)
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f = krealloc(eb->fences,
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(eb->num_fences + num_fences) * sizeof(*f),
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__GFP_NOWARN | GFP_KERNEL);
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if (!f)
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return -ENOMEM;
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for (n = 0; n < nfences; n++) {
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struct drm_i915_gem_exec_fence fence;
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eb->fences = f;
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f += eb->num_fences;
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while (num_fences--) {
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struct drm_i915_gem_exec_fence user_fence;
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struct drm_syncobj *syncobj;
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struct dma_fence *fence = NULL;
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if (__copy_from_user(&fence, user++, sizeof(fence))) {
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err = -EFAULT;
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goto err;
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}
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if (__copy_from_user(&user_fence, user++, sizeof(user_fence)))
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return -EFAULT;
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if (fence.flags & __I915_EXEC_FENCE_UNKNOWN_FLAGS) {
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err = -EINVAL;
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goto err;
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}
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if (user_fence.flags & __I915_EXEC_FENCE_UNKNOWN_FLAGS)
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return -EINVAL;
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syncobj = drm_syncobj_find(eb->file, fence.handle);
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syncobj = drm_syncobj_find(eb->file, user_fence.handle);
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if (!syncobj) {
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DRM_DEBUG("Invalid syncobj handle provided\n");
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err = -ENOENT;
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goto err;
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return -ENOENT;
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}
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if (user_fence.flags & I915_EXEC_FENCE_WAIT) {
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fence = drm_syncobj_fence_get(syncobj);
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if (!fence) {
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DRM_DEBUG("Syncobj handle has no fence\n");
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drm_syncobj_put(syncobj);
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return -EINVAL;
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}
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}
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BUILD_BUG_ON(~(ARCH_KMALLOC_MINALIGN - 1) &
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~__I915_EXEC_FENCE_UNKNOWN_FLAGS);
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fences[n].syncobj = ptr_pack_bits(syncobj, fence.flags, 2);
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f->syncobj = ptr_pack_bits(syncobj, user_fence.flags, 2);
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f->dma_fence = fence;
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f->value = 0;
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f->chain_fence = NULL;
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f++;
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eb->num_fences++;
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}
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eb->fences = fences;
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eb->n_fences = nfences;
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return 0;
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}
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err:
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__free_fence_array(fences, n);
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return err;
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static void put_fence_array(struct eb_fence *fences, int num_fences)
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{
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if (fences)
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__free_fence_array(fences, num_fences);
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}
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static int
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@ -2289,21 +2437,17 @@ await_fence_array(struct i915_execbuffer *eb)
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unsigned int n;
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int err;
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for (n = 0; n < eb->n_fences; n++) {
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for (n = 0; n < eb->num_fences; n++) {
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struct drm_syncobj *syncobj;
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struct dma_fence *fence;
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unsigned int flags;
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syncobj = ptr_unpack_bits(eb->fences[n].syncobj, &flags, 2);
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if (!(flags & I915_EXEC_FENCE_WAIT))
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if (!eb->fences[n].dma_fence)
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continue;
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fence = drm_syncobj_fence_get(syncobj);
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if (!fence)
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return -EINVAL;
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err = i915_request_await_dma_fence(eb->request, fence);
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dma_fence_put(fence);
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err = i915_request_await_dma_fence(eb->request,
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eb->fences[n].dma_fence);
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if (err < 0)
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return err;
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}
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@ -2311,13 +2455,12 @@ await_fence_array(struct i915_execbuffer *eb)
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return 0;
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}
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static void
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signal_fence_array(struct i915_execbuffer *eb)
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static void signal_fence_array(const struct i915_execbuffer *eb)
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{
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struct dma_fence * const fence = &eb->request->fence;
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unsigned int n;
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for (n = 0; n < eb->n_fences; n++) {
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for (n = 0; n < eb->num_fences; n++) {
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struct drm_syncobj *syncobj;
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unsigned int flags;
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@ -2325,10 +2468,34 @@ signal_fence_array(struct i915_execbuffer *eb)
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if (!(flags & I915_EXEC_FENCE_SIGNAL))
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continue;
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drm_syncobj_replace_fence(syncobj, fence);
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if (eb->fences[n].chain_fence) {
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drm_syncobj_add_point(syncobj,
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eb->fences[n].chain_fence,
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fence,
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eb->fences[n].value);
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/*
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* The chain's ownership is transferred to the
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* timeline.
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*/
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eb->fences[n].chain_fence = NULL;
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} else {
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drm_syncobj_replace_fence(syncobj, fence);
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}
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}
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}
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static int
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parse_timeline_fences(struct i915_user_extension __user *ext, void *data)
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{
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struct i915_execbuffer *eb = data;
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struct drm_i915_gem_execbuffer_ext_timeline_fences timeline_fences;
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if (copy_from_user(&timeline_fences, ext, sizeof(timeline_fences)))
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return -EFAULT;
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return add_timeline_fence_array(eb, &timeline_fences);
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}
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static void retire_requests(struct intel_timeline *tl, struct i915_request *end)
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{
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struct i915_request *rq, *rn;
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@ -2371,14 +2538,13 @@ static void eb_request_add(struct i915_execbuffer *eb)
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}
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static const i915_user_extension_fn execbuf_extensions[] = {
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[DRM_I915_GEM_EXECBUFFER_EXT_TIMELINE_FENCES] = parse_timeline_fences,
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};
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static int
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parse_execbuf2_extensions(struct drm_i915_gem_execbuffer2 *args,
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struct i915_execbuffer *eb)
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{
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eb->extension_flags = 0;
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if (!(args->flags & I915_EXEC_USE_EXTENSIONS))
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return 0;
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@ -2432,7 +2598,7 @@ i915_gem_do_execbuffer(struct drm_device *dev,
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eb.trampoline = NULL;
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eb.fences = NULL;
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eb.n_fences = 0;
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eb.num_fences = 0;
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|
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eb.batch_flags = 0;
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if (args->flags & I915_EXEC_SECURE) {
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@ -2451,14 +2617,24 @@ i915_gem_do_execbuffer(struct drm_device *dev,
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if (args->flags & I915_EXEC_IS_PINNED)
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eb.batch_flags |= I915_DISPATCH_PINNED;
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err = parse_execbuf2_extensions(args, &eb);
|
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if (err)
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goto err_ext;
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err = add_fence_array(&eb);
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if (err)
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goto err_ext;
|
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|
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#define IN_FENCES (I915_EXEC_FENCE_IN | I915_EXEC_FENCE_SUBMIT)
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if (args->flags & IN_FENCES) {
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if ((args->flags & IN_FENCES) == IN_FENCES)
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return -EINVAL;
|
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|
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in_fence = sync_file_get_fence(lower_32_bits(args->rsvd2));
|
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if (!in_fence)
|
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return -EINVAL;
|
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if (!in_fence) {
|
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err = -EINVAL;
|
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goto err_ext;
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}
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}
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#undef IN_FENCES
|
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|
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@ -2470,17 +2646,9 @@ i915_gem_do_execbuffer(struct drm_device *dev,
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}
|
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}
|
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|
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err = parse_execbuf2_extensions(args, &eb);
|
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if (err)
|
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goto err_out_fence;
|
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|
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err = get_fence_array(args, &eb);
|
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if (err)
|
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goto err_arr_fence;
|
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|
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err = eb_create(&eb);
|
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if (err)
|
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goto err_arr_fence;
|
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goto err_out_fence;
|
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|
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GEM_BUG_ON(!eb.lut_size);
|
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|
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@ -2576,7 +2744,7 @@ i915_gem_do_execbuffer(struct drm_device *dev,
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goto err_request;
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}
|
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|
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if (eb.n_fences) {
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if (eb.fences) {
|
||||
err = await_fence_array(&eb);
|
||||
if (err)
|
||||
goto err_request;
|
||||
@ -2608,7 +2776,7 @@ err_request:
|
||||
i915_request_get(eb.request);
|
||||
eb_request_add(&eb);
|
||||
|
||||
if (eb.n_fences)
|
||||
if (eb.fences)
|
||||
signal_fence_array(&eb);
|
||||
|
||||
if (out_fence) {
|
||||
@ -2637,13 +2805,13 @@ err_context:
|
||||
i915_gem_context_put(eb.gem_context);
|
||||
err_destroy:
|
||||
eb_destroy(&eb);
|
||||
err_arr_fence:
|
||||
__free_fence_array(eb.fences, eb.n_fences);
|
||||
err_out_fence:
|
||||
if (out_fence_fd != -1)
|
||||
put_unused_fd(out_fence_fd);
|
||||
err_in_fence:
|
||||
dma_fence_put(in_fence);
|
||||
err_ext:
|
||||
put_fence_array(eb.fences, eb.num_fences);
|
||||
return err;
|
||||
}
|
||||
|
||||
|
||||
@ -1846,7 +1846,8 @@ static struct drm_driver driver = {
|
||||
*/
|
||||
.driver_features =
|
||||
DRIVER_GEM |
|
||||
DRIVER_RENDER | DRIVER_MODESET | DRIVER_ATOMIC | DRIVER_SYNCOBJ,
|
||||
DRIVER_RENDER | DRIVER_MODESET | DRIVER_ATOMIC | DRIVER_SYNCOBJ |
|
||||
DRIVER_SYNCOBJ_TIMELINE,
|
||||
.release = i915_driver_release,
|
||||
.open = i915_driver_open,
|
||||
.lastclose = i915_driver_lastclose,
|
||||
|
||||
@ -132,6 +132,7 @@ int i915_getparam_ioctl(struct drm_device *dev, void *data,
|
||||
case I915_PARAM_HAS_EXEC_BATCH_FIRST:
|
||||
case I915_PARAM_HAS_EXEC_FENCE_ARRAY:
|
||||
case I915_PARAM_HAS_EXEC_SUBMIT_FENCE:
|
||||
case I915_PARAM_HAS_EXEC_TIMELINE_FENCES:
|
||||
/* For the time being all of these are always true;
|
||||
* if some supported hardware does not have one of these
|
||||
* features this value needs to be provided from
|
||||
|
||||
@ -619,6 +619,12 @@ typedef struct drm_i915_irq_wait {
|
||||
*/
|
||||
#define I915_PARAM_PERF_REVISION 54
|
||||
|
||||
/* Query whether DRM_I915_GEM_EXECBUFFER2 supports supplying an array of
|
||||
* timeline syncobj through drm_i915_gem_execbuffer_ext_timeline_fences. See
|
||||
* I915_EXEC_USE_EXTENSIONS.
|
||||
*/
|
||||
#define I915_PARAM_HAS_EXEC_TIMELINE_FENCES 55
|
||||
|
||||
/* Must be kept compact -- no holes and well documented */
|
||||
|
||||
typedef struct drm_i915_getparam {
|
||||
@ -1046,8 +1052,36 @@ struct drm_i915_gem_exec_fence {
|
||||
__u32 flags;
|
||||
};
|
||||
|
||||
enum drm_i915_gem_execbuffer_ext {
|
||||
DRM_I915_GEM_EXECBUFFER_EXT_MAX /* non-ABI */
|
||||
/**
|
||||
* See drm_i915_gem_execbuffer_ext_timeline_fences.
|
||||
*/
|
||||
#define DRM_I915_GEM_EXECBUFFER_EXT_TIMELINE_FENCES 0
|
||||
|
||||
/**
|
||||
* This structure describes an array of drm_syncobj and associated points for
|
||||
* timeline variants of drm_syncobj. It is invalid to append this structure to
|
||||
* the execbuf if I915_EXEC_FENCE_ARRAY is set.
|
||||
*/
|
||||
struct drm_i915_gem_execbuffer_ext_timeline_fences {
|
||||
struct i915_user_extension base;
|
||||
|
||||
/**
|
||||
* Number of element in the handles_ptr & value_ptr arrays.
|
||||
*/
|
||||
__u64 fence_count;
|
||||
|
||||
/**
|
||||
* Pointer to an array of struct drm_i915_gem_exec_fence of length
|
||||
* fence_count.
|
||||
*/
|
||||
__u64 handles_ptr;
|
||||
|
||||
/**
|
||||
* Pointer to an array of u64 values of length fence_count. Values
|
||||
* must be 0 for a binary drm_syncobj. A Value of 0 for a timeline
|
||||
* drm_syncobj is invalid as it turns a drm_syncobj into a binary one.
|
||||
*/
|
||||
__u64 values_ptr;
|
||||
};
|
||||
|
||||
struct drm_i915_gem_execbuffer2 {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user