[PATCH 06/11] drm/radeon: track VM update fences separately
Christian König
deathsimple at vodafone.de
Fri Sep 12 04:52:35 PDT 2014
From: Christian König <christian.koenig at amd.com>
Note for each fence if it's a VM page table update or not. This allows
us to determine the last VM update in a sync object and so to figure
out if we need to flush the TLB or not.
Signed-off-by: Christian König <christian.koenig at amd.com>
---
drivers/gpu/drm/radeon/radeon.h | 18 ++++++++++--------
drivers/gpu/drm/radeon/radeon_fence.c | 1 +
drivers/gpu/drm/radeon/radeon_ib.c | 3 ++-
drivers/gpu/drm/radeon/radeon_sync.c | 7 +++++++
drivers/gpu/drm/radeon/radeon_vm.c | 25 +++++++++++++------------
5 files changed, 33 insertions(+), 21 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index c326fae..fddb19e 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -357,14 +357,15 @@ struct radeon_fence_driver {
};
struct radeon_fence {
- struct fence base;
+ struct fence base;
- struct radeon_device *rdev;
- uint64_t seq;
+ struct radeon_device *rdev;
+ uint64_t seq;
/* RB, DMA, etc. */
- unsigned ring;
+ unsigned ring;
+ bool is_vm_update;
- wait_queue_t fence_wake;
+ wait_queue_t fence_wake;
};
int radeon_fence_driver_start_ring(struct radeon_device *rdev, int ring);
@@ -591,6 +592,7 @@ void radeon_semaphore_free(struct radeon_device *rdev,
struct radeon_sync {
struct radeon_semaphore *semaphores[RADEON_NUM_SYNCS];
struct radeon_fence *sync_to[RADEON_NUM_RINGS];
+ struct radeon_fence *last_vm_update;
};
void radeon_sync_create(struct radeon_sync *sync);
@@ -918,8 +920,8 @@ struct radeon_vm {
struct mutex mutex;
/* last fence for cs using this vm */
struct radeon_fence *fence;
- /* last flush or NULL if we still need to flush */
- struct radeon_fence *last_flush;
+ /* last flushed PD/PT update */
+ struct radeon_fence *flushed_updates;
/* last use of vmid */
struct radeon_fence *last_id_use;
};
@@ -2948,7 +2950,7 @@ struct radeon_fence *radeon_vm_grab_id(struct radeon_device *rdev,
struct radeon_vm *vm, int ring);
void radeon_vm_flush(struct radeon_device *rdev,
struct radeon_vm *vm,
- int ring);
+ int ring, struct radeon_fence *fence);
void radeon_vm_fence(struct radeon_device *rdev,
struct radeon_vm *vm,
struct radeon_fence *fence);
diff --git a/drivers/gpu/drm/radeon/radeon_fence.c b/drivers/gpu/drm/radeon/radeon_fence.c
index af9f2d6..71aa198 100644
--- a/drivers/gpu/drm/radeon/radeon_fence.c
+++ b/drivers/gpu/drm/radeon/radeon_fence.c
@@ -140,6 +140,7 @@ int radeon_fence_emit(struct radeon_device *rdev,
(*fence)->rdev = rdev;
(*fence)->seq = seq;
(*fence)->ring = ring;
+ (*fence)->is_vm_update = false;
fence_init(&(*fence)->base, &radeon_fence_ops,
&rdev->fence_queue.lock, rdev->fence_context + ring, seq);
radeon_fence_ring_emit(rdev, ring, *fence);
diff --git a/drivers/gpu/drm/radeon/radeon_ib.c b/drivers/gpu/drm/radeon/radeon_ib.c
index 56a1704..c39ce1f 100644
--- a/drivers/gpu/drm/radeon/radeon_ib.c
+++ b/drivers/gpu/drm/radeon/radeon_ib.c
@@ -154,7 +154,8 @@ int radeon_ib_schedule(struct radeon_device *rdev, struct radeon_ib *ib,
}
if (ib->vm)
- radeon_vm_flush(rdev, ib->vm, ib->ring);
+ radeon_vm_flush(rdev, ib->vm, ib->ring,
+ ib->sync.last_vm_update);
if (const_ib) {
radeon_ring_ib_execute(rdev, const_ib->ring, const_ib);
diff --git a/drivers/gpu/drm/radeon/radeon_sync.c b/drivers/gpu/drm/radeon/radeon_sync.c
index 77b7401..4e7a7f7 100644
--- a/drivers/gpu/drm/radeon/radeon_sync.c
+++ b/drivers/gpu/drm/radeon/radeon_sync.c
@@ -48,6 +48,8 @@ void radeon_sync_create(struct radeon_sync *sync)
for (i = 0; i < RADEON_NUM_RINGS; ++i)
sync->sync_to[i] = NULL;
+
+ sync->last_vm_update = NULL;
}
/**
@@ -68,6 +70,11 @@ void radeon_sync_fence(struct radeon_sync *sync,
other = sync->sync_to[fence->ring];
sync->sync_to[fence->ring] = radeon_fence_later(fence, other);
+
+ if (fence->is_vm_update) {
+ other = sync->last_vm_update;
+ sync->last_vm_update = radeon_fence_later(fence, other);
+ }
}
/**
diff --git a/drivers/gpu/drm/radeon/radeon_vm.c b/drivers/gpu/drm/radeon/radeon_vm.c
index 84b2735..ff104a5 100644
--- a/drivers/gpu/drm/radeon/radeon_vm.c
+++ b/drivers/gpu/drm/radeon/radeon_vm.c
@@ -190,7 +190,7 @@ struct radeon_fence *radeon_vm_grab_id(struct radeon_device *rdev,
return NULL;
/* we definately need to flush */
- radeon_fence_unref(&vm->last_flush);
+ vm->pd_gpu_addr = ~0ll;
/* skip over VMID 0, since it is the system VM */
for (i = 1; i < rdev->vm_manager.nvm; ++i) {
@@ -228,6 +228,7 @@ struct radeon_fence *radeon_vm_grab_id(struct radeon_device *rdev,
* @rdev: radeon_device pointer
* @vm: vm we want to flush
* @ring: ring to use for flush
+ * @updates: last vm update that is waited for
*
* Flush the vm (cayman+).
*
@@ -235,13 +236,16 @@ struct radeon_fence *radeon_vm_grab_id(struct radeon_device *rdev,
*/
void radeon_vm_flush(struct radeon_device *rdev,
struct radeon_vm *vm,
- int ring)
+ int ring, struct radeon_fence *updates)
{
uint64_t pd_addr = radeon_bo_gpu_offset(vm->page_directory);
- /* if we can't remember our last VM flush then flush now! */
- if (!vm->last_flush || pd_addr != vm->pd_gpu_addr) {
+ if (pd_addr != vm->pd_gpu_addr || !vm->flushed_updates ||
+ radeon_fence_is_earlier(vm->flushed_updates, updates)) {
+
trace_radeon_vm_flush(pd_addr, ring, vm->id);
+ radeon_fence_unref(&vm->flushed_updates);
+ vm->flushed_updates = radeon_fence_ref(updates);
vm->pd_gpu_addr = pd_addr;
radeon_ring_vm_flush(rdev, &rdev->ring[ring],
vm->id, vm->pd_gpu_addr);
@@ -272,10 +276,6 @@ void radeon_vm_fence(struct radeon_device *rdev,
radeon_fence_unref(&vm->last_id_use);
vm->last_id_use = radeon_fence_ref(fence);
-
- /* we just flushed the VM, remember that */
- if (!vm->last_flush)
- vm->last_flush = radeon_fence_ref(fence);
}
/**
@@ -418,6 +418,7 @@ static int radeon_vm_clear_bo(struct radeon_device *rdev,
if (r)
goto error_free;
+ ib.fence->is_vm_update = true;
radeon_bo_fence(bo, ib.fence, false);
error_free:
@@ -696,10 +697,10 @@ int radeon_vm_update_page_directory(struct radeon_device *rdev,
radeon_ib_free(rdev, &ib);
return r;
}
+ ib.fence->is_vm_update = true;
radeon_bo_fence(pd, ib.fence, false);
radeon_fence_unref(&vm->fence);
vm->fence = radeon_fence_ref(ib.fence);
- radeon_fence_unref(&vm->last_flush);
}
radeon_ib_free(rdev, &ib);
@@ -988,11 +989,11 @@ int radeon_vm_bo_update(struct radeon_device *rdev,
radeon_ib_free(rdev, &ib);
return r;
}
+ ib.fence->is_vm_update = true;
radeon_vm_fence_pts(vm, bo_va->it.start, bo_va->it.last + 1, ib.fence);
radeon_fence_unref(&vm->fence);
vm->fence = radeon_fence_ref(ib.fence);
radeon_ib_free(rdev, &ib);
- radeon_fence_unref(&vm->last_flush);
return 0;
}
@@ -1123,7 +1124,7 @@ int radeon_vm_init(struct radeon_device *rdev, struct radeon_vm *vm)
vm->id = 0;
vm->ib_bo_va = NULL;
vm->fence = NULL;
- vm->last_flush = NULL;
+ vm->flushed_updates = NULL;
vm->last_id_use = NULL;
mutex_init(&vm->mutex);
vm->va = RB_ROOT;
@@ -1195,7 +1196,7 @@ void radeon_vm_fini(struct radeon_device *rdev, struct radeon_vm *vm)
radeon_bo_unref(&vm->page_directory);
radeon_fence_unref(&vm->fence);
- radeon_fence_unref(&vm->last_flush);
+ radeon_fence_unref(&vm->flushed_updates);
radeon_fence_unref(&vm->last_id_use);
mutex_destroy(&vm->mutex);
--
1.9.1
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