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drm/nouveau: fix assumption that semaphore dmaobj is valid in x-chan sync

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The DDX modifies DMA_SEMAPHORE on nv50 in order to implement sync-to-vblank,
things will go very wrong for cross-channel sync after this.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2011-06-17 23:41:54 +10:00
parent f66b3d5540
commit b16a5a18ff
1 changed files with 25 additions and 34 deletions
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59
drivers/gpu/drm/nouveau/nouveau_fence.c
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@ -339,11 +339,12 @@ semaphore_acquire(struct nouveau_channel *chan, struct nouveau_semaphore *sema)
int ret;
if (dev_priv->chipset < 0x84) {
ret = RING_SPACE(chan, 3);
ret = RING_SPACE(chan, 4);
if (ret)
return ret;
BEGIN_RING(chan, NvSubSw, NV_SW_SEMAPHORE_OFFSET, 2);
BEGIN_RING(chan, NvSubSw, NV_SW_DMA_SEMAPHORE, 3);
OUT_RING (chan, NvSema);
OUT_RING (chan, sema->mem->start);
OUT_RING (chan, 1);
} else
@ -351,10 +352,12 @@ semaphore_acquire(struct nouveau_channel *chan, struct nouveau_semaphore *sema)
struct nouveau_vma *vma = &dev_priv->fence.bo->vma;
u64 offset = vma->offset + sema->mem->start;
ret = RING_SPACE(chan, 5);
ret = RING_SPACE(chan, 7);
if (ret)
return ret;
BEGIN_RING(chan, NvSubSw, NV_SW_DMA_SEMAPHORE, 1);
OUT_RING (chan, chan->vram_handle);
BEGIN_RING(chan, NvSubSw, 0x0010, 4);
OUT_RING (chan, upper_32_bits(offset));
OUT_RING (chan, lower_32_bits(offset));
@ -394,11 +397,12 @@ semaphore_release(struct nouveau_channel *chan, struct nouveau_semaphore *sema)
int ret;
if (dev_priv->chipset < 0x84) {
ret = RING_SPACE(chan, 4);
ret = RING_SPACE(chan, 5);
if (ret)
return ret;
BEGIN_RING(chan, NvSubSw, NV_SW_SEMAPHORE_OFFSET, 1);
BEGIN_RING(chan, NvSubSw, NV_SW_DMA_SEMAPHORE, 2);
OUT_RING (chan, NvSema);
OUT_RING (chan, sema->mem->start);
BEGIN_RING(chan, NvSubSw, NV_SW_SEMAPHORE_RELEASE, 1);
OUT_RING (chan, 1);
@ -407,10 +411,12 @@ semaphore_release(struct nouveau_channel *chan, struct nouveau_semaphore *sema)
struct nouveau_vma *vma = &dev_priv->fence.bo->vma;
u64 offset = vma->offset + sema->mem->start;
ret = RING_SPACE(chan, 5);
ret = RING_SPACE(chan, 7);
if (ret)
return ret;
BEGIN_RING(chan, NvSubSw, NV_SW_DMA_SEMAPHORE, 1);
OUT_RING (chan, chan->vram_handle);
BEGIN_RING(chan, NvSubSw, 0x0010, 4);
OUT_RING (chan, upper_32_bits(offset));
OUT_RING (chan, lower_32_bits(offset));
@ -504,22 +510,22 @@ nouveau_fence_channel_init(struct nouveau_channel *chan)
struct nouveau_gpuobj *obj = NULL;
int ret;
if (dev_priv->card_type >= NV_C0)
goto out_initialised;
if (dev_priv->card_type < NV_C0) {
/* Create an NV_SW object for various sync purposes */
ret = nouveau_gpuobj_gr_new(chan, NvSw, NV_SW);
if (ret)
return ret;
/* Create an NV_SW object for various sync purposes */
ret = nouveau_gpuobj_gr_new(chan, NvSw, NV_SW);
if (ret)
return ret;
ret = RING_SPACE(chan, 2);
if (ret)
return ret;
/* we leave subchannel empty for nvc0 */
ret = RING_SPACE(chan, 2);
if (ret)
return ret;
BEGIN_RING(chan, NvSubSw, 0, 1);
OUT_RING(chan, NvSw);
BEGIN_RING(chan, NvSubSw, 0, 1);
OUT_RING (chan, NvSw);
FIRE_RING (chan);
}
/* Create a DMA object for the shared cross-channel sync area. */
/* Setup area of memory shared between all channels for x-chan sync */
if (USE_SEMA(dev) && dev_priv->chipset < 0x84) {
struct ttm_mem_reg *mem = &dev_priv->fence.bo->bo.mem;
@ -534,23 +540,8 @@ nouveau_fence_channel_init(struct nouveau_channel *chan)
nouveau_gpuobj_ref(NULL, &obj);
if (ret)
return ret;
ret = RING_SPACE(chan, 2);
if (ret)
return ret;
BEGIN_RING(chan, NvSubSw, NV_SW_DMA_SEMAPHORE, 1);
OUT_RING(chan, NvSema);
} else {
ret = RING_SPACE(chan, 2);
if (ret)
return ret;
BEGIN_RING(chan, NvSubSw, NV_SW_DMA_SEMAPHORE, 1);
OUT_RING (chan, chan->vram_handle); /* whole VM */
}
FIRE_RING(chan);
out_initialised:
INIT_LIST_HEAD(&chan->fence.pending);
spin_lock_init(&chan->fence.lock);
atomic_set(&chan->fence.last_sequence_irq, 0);