We can simplify our tracking of pending writes in an execbuf to the
single bit in the vma->exec_entry->flags, but that requires the
relocation function knowing the object's vma. Pass it along.
Note we have only been using a single bit to track flushing since
commit cc889e0f6ce6a63c62db17d702ecfed86d58083f
Author: Daniel Vetter <daniel.vetter@xxxxxxxx>
Date: Wed Jun 13 20:45:19 2012 +0200
drm/i915: disable flushing_list/gpu_write_list
unconditionally flushed all render caches before the breadcrumb and
commit 6ac42f4148bc27e5ffd18a9ab0eac57f58822af4
Author: Daniel Vetter <daniel.vetter@xxxxxxxx>
Date: Sat Jul 21 12:25:01 2012 +0200
drm/i915: Replace the complex flushing logic with simple invalidate/flush all
did away with the explicit GPU domain tracking. This was then codified
into the ABI with NO_RELOC in
commit ed5982e6ce5f106abcbf071f80730db344a6da42
Author: Daniel Vetter <daniel.vetter@xxxxxxxx> # Oi! Patch stealer!
Date: Thu Jan 17 22:23:36 2013 +0100
drm/i915: Allow userspace to hint that the relocations were known
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_gem_execbuffer.c | 101 ++++++++++++-----------------
1 file changed, 41 insertions(+), 60 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index a3a7e0258d3f..6578429ad07c 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -620,42 +620,25 @@ relocate_entry(struct drm_i915_gem_object *obj,
}
static int
-eb_relocate_entry(struct drm_i915_gem_object *obj,
+eb_relocate_entry(struct i915_vma *vma,
struct i915_execbuffer *eb,
struct drm_i915_gem_relocation_entry *reloc)
{
- struct drm_gem_object *target_obj;
- struct drm_i915_gem_object *target_i915_obj;
- struct i915_vma *target_vma;
- uint64_t target_offset;
+ struct i915_vma *target;
+ u64 target_offset;
int ret;
/* we've already hold a reference to all valid objects */
- target_vma = eb_get_vma(eb, reloc->target_handle);
- if (unlikely(target_vma == NULL))
+ target = eb_get_vma(eb, reloc->target_handle);
+ if (unlikely(!target))
return -ENOENT;
- target_i915_obj = target_vma->obj;
- target_obj = &target_vma->obj->base;
-
- target_offset = gen8_canonical_addr(target_vma->node.start);
-
- /* Sandybridge PPGTT errata: We need a global gtt mapping for MI and
- * pipe_control writes because the gpu doesn't properly redirect them
- * through the ppgtt for non_secure batchbuffers. */
- if (unlikely(IS_GEN6(eb->i915) &&
- reloc->write_domain == I915_GEM_DOMAIN_INSTRUCTION)) {
- ret = i915_vma_bind(target_vma, target_i915_obj->cache_level,
- PIN_GLOBAL);
- if (WARN_ONCE(ret, "Unexpected failure to bind target VMA!"))
- return ret;
- }
/* Validate that the target is in a valid r/w GPU domain */
if (unlikely(reloc->write_domain & (reloc->write_domain - 1))) {
DRM_DEBUG("reloc with multiple write domains: "
- "obj %p target %d offset %d "
+ "target %d offset %d "
"read %08x write %08x",
- obj, reloc->target_handle,
+ reloc->target_handle,
(int) reloc->offset,
reloc->read_domains,
reloc->write_domain);
@@ -664,43 +647,56 @@ eb_relocate_entry(struct drm_i915_gem_object *obj,
if (unlikely((reloc->write_domain | reloc->read_domains)
& ~I915_GEM_GPU_DOMAINS)) {
DRM_DEBUG("reloc with read/write non-GPU domains: "
- "obj %p target %d offset %d "
+ "target %d offset %d "
"read %08x write %08x",
- obj, reloc->target_handle,
+ reloc->target_handle,
(int) reloc->offset,
reloc->read_domains,
reloc->write_domain);
return -EINVAL;
}
- target_obj->pending_read_domains |= reloc->read_domains;
- target_obj->pending_write_domain |= reloc->write_domain;
+ if (reloc->write_domain)
+ target->exec_entry->flags |= EXEC_OBJECT_WRITE;
+
+ /* Sandybridge PPGTT errata: We need a global gtt mapping for MI and
+ * pipe_control writes because the gpu doesn't properly redirect them
+ * through the ppgtt for non_secure batchbuffers.
+ */
+ if (unlikely(IS_GEN6(eb->i915) &&
+ reloc->write_domain == I915_GEM_DOMAIN_INSTRUCTION)) {
+ ret = i915_vma_bind(target, target->obj->cache_level,
+ PIN_GLOBAL);
+ if (WARN_ONCE(ret, "Unexpected failure to bind target VMA!"))
+ return ret;
+ }
/* If the relocation already has the right value in it, no
* more work needs to be done.
*/
+ target_offset = gen8_canonical_addr(target->node.start);
if (target_offset == reloc->presumed_offset)
return 0;
/* Check that the relocation address is valid... */
if (unlikely(reloc->offset >
- obj->base.size - (eb->reloc_cache.use_64bit_reloc ? 8 : 4))) {
+ vma->size - (eb->reloc_cache.use_64bit_reloc ? 8 : 4))) {
DRM_DEBUG("Relocation beyond object bounds: "
- "obj %p target %d offset %d size %d.\n",
- obj, reloc->target_handle,
- (int) reloc->offset,
- (int) obj->base.size);
+ "target %d offset %d size %d.\n",
+ reloc->target_handle,
+ (int)reloc->offset,
+ (int)vma->size);
return -EINVAL;
}
if (unlikely(reloc->offset & 3)) {
DRM_DEBUG("Relocation not 4-byte aligned: "
- "obj %p target %d offset %d.\n",
- obj, reloc->target_handle,
- (int) reloc->offset);
+ "target %d offset %d.\n",
+ reloc->target_handle,
+ (int)reloc->offset);
return -EINVAL;
}
- ret = relocate_entry(obj, reloc, &eb->reloc_cache, target_offset);
+ ret = relocate_entry(vma->obj, reloc, &eb->reloc_cache, target_offset);
if (ret)
return ret;
@@ -746,7 +742,7 @@ static int eb_relocate_vma(struct i915_vma *vma, struct i915_execbuffer *eb)
do {
u64 offset = r->presumed_offset;
- ret = eb_relocate_entry(vma->obj, eb, r);
+ ret = eb_relocate_entry(vma, eb, r);
if (ret)
goto out;
@@ -792,7 +788,7 @@ eb_relocate_vma_slow(struct i915_vma *vma,
int i, ret = 0;
for (i = 0; i < entry->relocation_count; i++) {
- ret = eb_relocate_entry(vma->obj, eb, &relocs[i]);
+ ret = eb_relocate_entry(vma, eb, &relocs[i]);
if (ret)
break;
}
@@ -825,7 +821,6 @@ eb_reserve_vma(struct i915_vma *vma,
struct intel_engine_cs *engine,
bool *need_reloc)
{
- struct drm_i915_gem_object *obj = vma->obj;
struct drm_i915_gem_exec_object2 *entry = vma->exec_entry;
uint64_t flags;
int ret;
@@ -879,11 +874,6 @@ eb_reserve_vma(struct i915_vma *vma,
*need_reloc = true;
}
- if (entry->flags & EXEC_OBJECT_WRITE) {
- obj->base.pending_read_domains = I915_GEM_DOMAIN_RENDER;
- obj->base.pending_write_domain = I915_GEM_DOMAIN_RENDER;
- }
-
return 0;
}
@@ -946,7 +936,6 @@ static int eb_reserve(struct i915_execbuffer *eb)
{
const bool has_fenced_gpu_access = INTEL_GEN(eb->i915) < 4;
const bool needs_unfenced_map = INTEL_INFO(eb->i915)->unfenced_needs_alignment;
- struct drm_i915_gem_object *obj;
struct i915_vma *vma;
struct list_head ordered_vmas;
struct list_head pinned_vmas;
@@ -959,7 +948,6 @@ static int eb_reserve(struct i915_execbuffer *eb)
bool need_fence, need_mappable;
vma = list_first_entry(&eb->vmas, struct i915_vma, exec_link);
- obj = vma->obj;
entry = vma->exec_entry;
if (eb->ctx->flags & CONTEXT_NO_ZEROMAP)
@@ -980,9 +968,6 @@ static int eb_reserve(struct i915_execbuffer *eb)
list_move(&vma->exec_link, &ordered_vmas);
} else
list_move_tail(&vma->exec_link, &ordered_vmas);
-
- obj->base.pending_read_domains = I915_GEM_GPU_DOMAINS & ~I915_GEM_DOMAIN_COMMAND;
- obj->base.pending_write_domain = 0;
}
list_splice(&ordered_vmas, &eb->vmas);
list_splice(&pinned_vmas, &eb->vmas);
@@ -1170,7 +1155,7 @@ eb_move_to_gpu(struct i915_execbuffer *eb)
}
ret = i915_gem_request_await_object
- (eb->request, obj, obj->base.pending_write_domain);
+ (eb->request, obj, vma->exec_entry->flags & EXEC_OBJECT_WRITE);
if (ret)
return ret;
}
@@ -1371,12 +1356,10 @@ eb_move_to_active(struct i915_execbuffer *eb)
list_for_each_entry(vma, &eb->vmas, exec_link) {
struct drm_i915_gem_object *obj = vma->obj;
- obj->base.write_domain = obj->base.pending_write_domain;
- if (obj->base.write_domain)
- vma->exec_entry->flags |= EXEC_OBJECT_WRITE;
- else
- obj->base.pending_read_domains |= obj->base.read_domains;
- obj->base.read_domains = obj->base.pending_read_domains;
+ obj->base.write_domain = 0;
+ if (vma->exec_entry->flags & EXEC_OBJECT_WRITE)
+ obj->base.read_domains = 0;
+ obj->base.read_domains |= I915_GEM_GPU_DOMAINS;
i915_vma_move_to_active(vma, eb->request, vma->exec_entry->flags);
eb_export_fence(obj, eb->request, vma->exec_entry->flags);
@@ -1686,8 +1669,7 @@ i915_gem_do_execbuffer(struct drm_device *dev,
goto err;
}
- /* Set the pending read domains for the batch buffer to COMMAND */
- if (eb.batch->obj->base.pending_write_domain) {
+ if (eb.batch->exec_entry->flags & EXEC_OBJECT_WRITE) {
DRM_DEBUG("Attempting to use self-modifying batch buffer\n");
ret = -EINVAL;
goto err;
@@ -1724,7 +1706,6 @@ i915_gem_do_execbuffer(struct drm_device *dev,
}
}
- eb.batch->obj->base.pending_read_domains |= I915_GEM_DOMAIN_COMMAND;
if (eb.batch_len == 0)
eb.batch_len = eb.batch->size - eb.batch_start_offset;
--
2.11.0
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