On Thu, May 24, 2012 at 09:49:06AM +0200, Christian König wrote:
> Signed-off-by: Christian König <deathsimple@xxxxxxxxxxx>
Need a small improvement see below, otherwise
Reviewed-by: Jerome Glisse <jglisse@xxxxxxxxxx>
> ---
> drivers/gpu/drm/radeon/radeon.h | 23 ++++++++++-
> drivers/gpu/drm/radeon/radeon_fence.c | 73 +++++++++++++++++++++++++++++----
> 2 files changed, 85 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
> index 5e259b4..4e232c3 100644
> --- a/drivers/gpu/drm/radeon/radeon.h
> +++ b/drivers/gpu/drm/radeon/radeon.h
> @@ -257,8 +257,8 @@ struct radeon_fence_driver {
> uint32_t scratch_reg;
> uint64_t gpu_addr;
> volatile uint32_t *cpu_addr;
> - /* seq is protected by ring emission lock */
> - uint64_t seq;
> + /* sync_seq is protected by ring emission lock */
> + uint64_t sync_seq[RADEON_NUM_RINGS];
> atomic64_t last_seq;
> unsigned long last_activity;
> bool initialized;
> @@ -288,6 +288,25 @@ int radeon_fence_wait_any(struct radeon_device *rdev,
> struct radeon_fence *radeon_fence_ref(struct radeon_fence *fence);
> void radeon_fence_unref(struct radeon_fence **fence);
> unsigned radeon_fence_count_emitted(struct radeon_device *rdev, int ring);
> +bool radeon_fence_need_sync(struct radeon_fence *fence, int ring);
> +void radeon_fence_note_sync(struct radeon_fence *fence, int ring);
> +static inline struct radeon_fence *radeon_fence_later(struct radeon_fence *a,
> + struct radeon_fence *b)
> +{
> + if (!a) {
> + return b;
> + }
> +
> + if (!b) {
> + return a;
> + }
Please add :
BUG_ON(a->ring != b->ring);
So we can catch if someone badly use this function.
> +
> + if (a->seq > b->seq) {
> + return a;
> + } else {
> + return b;
> + }
> +}
>
> /*
> * Tiling registers
> diff --git a/drivers/gpu/drm/radeon/radeon_fence.c b/drivers/gpu/drm/radeon/radeon_fence.c
> index 401d346..7b55625 100644
> --- a/drivers/gpu/drm/radeon/radeon_fence.c
> +++ b/drivers/gpu/drm/radeon/radeon_fence.c
> @@ -72,7 +72,7 @@ int radeon_fence_emit(struct radeon_device *rdev,
> }
> kref_init(&((*fence)->kref));
> (*fence)->rdev = rdev;
> - (*fence)->seq = ++rdev->fence_drv[ring].seq;
> + (*fence)->seq = ++rdev->fence_drv[ring].sync_seq[ring];
> (*fence)->ring = ring;
> radeon_fence_ring_emit(rdev, ring, *fence);
> trace_radeon_fence_emit(rdev->ddev, (*fence)->seq);
> @@ -449,7 +449,7 @@ int radeon_fence_wait_next_locked(struct radeon_device *rdev, int ring)
> * wait.
> */
> seq = atomic64_read(&rdev->fence_drv[ring].last_seq) + 1ULL;
> - if (seq >= rdev->fence_drv[ring].seq) {
> + if (seq >= rdev->fence_drv[ring].sync_seq[ring]) {
> /* nothing to wait for, last_seq is
> already the last emited fence */
> return -ENOENT;
> @@ -464,7 +464,7 @@ int radeon_fence_wait_empty_locked(struct radeon_device *rdev, int ring)
> * activity can be scheduled so there won't be concurrent access
> * to seq value.
> */
> - return radeon_fence_wait_seq(rdev, rdev->fence_drv[ring].seq,
> + return radeon_fence_wait_seq(rdev, rdev->fence_drv[ring].sync_seq[ring],
> ring, false, false);
> }
>
> @@ -492,7 +492,8 @@ unsigned radeon_fence_count_emitted(struct radeon_device *rdev, int ring)
> * but it's ok to report slightly wrong fence count here.
> */
> radeon_fence_process(rdev, ring);
> - emitted = rdev->fence_drv[ring].seq - atomic64_read(&rdev->fence_drv[ring].last_seq);
> + emitted = rdev->fence_drv[ring].sync_seq[ring]
> + - atomic64_read(&rdev->fence_drv[ring].last_seq);
> /* to avoid 32bits warp around */
> if (emitted > 0x10000000) {
> emitted = 0x10000000;
> @@ -500,6 +501,51 @@ unsigned radeon_fence_count_emitted(struct radeon_device *rdev, int ring)
> return (unsigned)emitted;
> }
>
> +bool radeon_fence_need_sync(struct radeon_fence *fence, int dst_ring)
> +{
> + struct radeon_fence_driver *fdrv;
> +
> + if (!fence) {
> + return false;
> + }
> +
> + if (fence->ring == dst_ring) {
> + return false;
> + }
> +
> + /* we are protected by the ring mutex */
> + fdrv = &fence->rdev->fence_drv[dst_ring];
> + if (fence->seq <= fdrv->sync_seq[fence->ring]) {
> + return false;
> + }
> +
> + return true;
> +}
> +
> +void radeon_fence_note_sync(struct radeon_fence *fence, int dst_ring)
> +{
> + struct radeon_fence_driver *dst, *src;
> + unsigned i;
> +
> + if (!fence) {
> + return;
> + }
> +
> + if (fence->ring == dst_ring) {
> + return;
> + }
> +
> + /* we are protected by the ring mutex */
> + src = &fence->rdev->fence_drv[fence->ring];
> + dst = &fence->rdev->fence_drv[dst_ring];
> + for (i = 0; i < RADEON_NUM_RINGS; ++i) {
> + if (i == dst_ring) {
> + continue;
> + }
> + dst->sync_seq[i] = max(dst->sync_seq[i], src->sync_seq[i]);
> + }
> +}
> +
> int radeon_fence_driver_start_ring(struct radeon_device *rdev, int ring)
> {
> uint64_t index;
> @@ -521,7 +567,7 @@ int radeon_fence_driver_start_ring(struct radeon_device *rdev, int ring)
> }
> rdev->fence_drv[ring].cpu_addr = &rdev->wb.wb[index/4];
> rdev->fence_drv[ring].gpu_addr = rdev->wb.gpu_addr + index;
> - radeon_fence_write(rdev, rdev->fence_drv[ring].seq, ring);
> + radeon_fence_write(rdev, rdev->fence_drv[ring].sync_seq[ring], ring);
> rdev->fence_drv[ring].initialized = true;
> dev_info(rdev->dev, "fence driver on ring %d use gpu addr 0x%016llx and cpu addr 0x%p\n",
> ring, rdev->fence_drv[ring].gpu_addr, rdev->fence_drv[ring].cpu_addr);
> @@ -530,10 +576,13 @@ int radeon_fence_driver_start_ring(struct radeon_device *rdev, int ring)
>
> static void radeon_fence_driver_init_ring(struct radeon_device *rdev, int ring)
> {
> + int i;
> +
> rdev->fence_drv[ring].scratch_reg = -1;
> rdev->fence_drv[ring].cpu_addr = NULL;
> rdev->fence_drv[ring].gpu_addr = 0;
> - rdev->fence_drv[ring].seq = 0;
> + for (i = 0; i < RADEON_NUM_RINGS; ++i)
> + rdev->fence_drv[ring].sync_seq[i] = 0;
> atomic64_set(&rdev->fence_drv[ring].last_seq, 0);
> rdev->fence_drv[ring].last_activity = jiffies;
> rdev->fence_drv[ring].initialized = false;
> @@ -579,7 +628,7 @@ static int radeon_debugfs_fence_info(struct seq_file *m, void *data)
> struct drm_info_node *node = (struct drm_info_node *)m->private;
> struct drm_device *dev = node->minor->dev;
> struct radeon_device *rdev = dev->dev_private;
> - int i;
> + int i, j;
>
> for (i = 0; i < RADEON_NUM_RINGS; ++i) {
> if (!rdev->fence_drv[i].initialized)
> @@ -588,8 +637,14 @@ static int radeon_debugfs_fence_info(struct seq_file *m, void *data)
> seq_printf(m, "--- ring %d ---\n", i);
> seq_printf(m, "Last signaled fence 0x%016llx\n",
> (unsigned long long)atomic64_read(&rdev->fence_drv[i].last_seq));
> - seq_printf(m, "Last emitted 0x%016llx\n",
> - rdev->fence_drv[i].seq);
> + seq_printf(m, "Last emitted 0x%016llx\n",
> + rdev->fence_drv[i].sync_seq[i]);
> +
> + for (j = 0; j < RADEON_NUM_RINGS; ++j) {
> + if (i != j && rdev->fence_drv[j].initialized)
> + seq_printf(m, "Last sync to ring %d 0x%016llx\n",
> + j, rdev->fence_drv[i].sync_seq[j]);
> + }
> }
> return 0;
> }
> --
> 1.7.9.5
>
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