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drm/i915/ringbuffer: kill snb blt workaround 

This was just to facilitate product enablement with pre-production hw.
Allows us to kill quite a bit of cruft.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2011-12-14 13:57:07 +01:00
parent c1cd90ed79
commit 6a233c7887
1 changed files with 2 additions and 79 deletions
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81
drivers/gpu/drm/i915/intel_ringbuffer.c
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@ -1368,79 +1368,13 @@ blt_ring_put_irq(struct intel_ring_buffer *ring)
GEN6_BLITTER_USER_INTERRUPT);
}
/* Workaround for some stepping of SNB,
* each time when BLT engine ring tail moved,
* the first command in the ring to be parsed
* should be MI_BATCH_BUFFER_START
*/
#define NEED_BLT_WORKAROUND(dev) \
(IS_GEN6(dev) && (dev->pdev->revision < 8))
static inline struct drm_i915_gem_object *
to_blt_workaround(struct intel_ring_buffer *ring)
{
return ring->private;
}
static int blt_ring_init(struct intel_ring_buffer *ring)
{
if (NEED_BLT_WORKAROUND(ring->dev)) {
struct drm_i915_gem_object *obj;
u32 *ptr;
int ret;
obj = i915_gem_alloc_object(ring->dev, 4096);
if (obj == NULL)
return -ENOMEM;
ret = i915_gem_object_pin(obj, 4096, true);
if (ret) {
drm_gem_object_unreference(&obj->base);
return ret;
}
ptr = kmap(obj->pages[0]);
*ptr++ = MI_BATCH_BUFFER_END;
*ptr++ = MI_NOOP;
kunmap(obj->pages[0]);
ret = i915_gem_object_set_to_gtt_domain(obj, false);
if (ret) {
i915_gem_object_unpin(obj);
drm_gem_object_unreference(&obj->base);
return ret;
}
ring->private = obj;
}
return init_ring_common(ring);
}
static int blt_ring_begin(struct intel_ring_buffer *ring,
int num_dwords)
{
if (ring->private) {
int ret = intel_ring_begin(ring, num_dwords+2);
if (ret)
return ret;
intel_ring_emit(ring, MI_BATCH_BUFFER_START);
intel_ring_emit(ring, to_blt_workaround(ring)->gtt_offset);
return 0;
} else
return intel_ring_begin(ring, 4);
}
static int blt_ring_flush(struct intel_ring_buffer *ring,
u32 invalidate, u32 flush)
{
uint32_t cmd;
int ret;
ret = blt_ring_begin(ring, 4);
ret = intel_ring_begin(ring, 4);
if (ret)
return ret;
@ -1455,22 +1389,12 @@ static int blt_ring_flush(struct intel_ring_buffer *ring,
return 0;
}
static void blt_ring_cleanup(struct intel_ring_buffer *ring)
{
if (!ring->private)
return;
i915_gem_object_unpin(ring->private);
drm_gem_object_unreference(ring->private);
ring->private = NULL;
}
static const struct intel_ring_buffer gen6_blt_ring = {
.name = "blt ring",
.id = BCS,
.mmio_base = BLT_RING_BASE,
.size = 32 * PAGE_SIZE,
.init = blt_ring_init,
.init = init_ring_common,
.write_tail = ring_write_tail,
.flush = blt_ring_flush,
.add_request = gen6_add_request,
@ -1478,7 +1402,6 @@ static const struct intel_ring_buffer gen6_blt_ring = {
.irq_get = blt_ring_get_irq,
.irq_put = blt_ring_put_irq,
.dispatch_execbuffer = gen6_ring_dispatch_execbuffer,
.cleanup = blt_ring_cleanup,
.sync_to = gen6_blt_ring_sync_to,
.semaphore_register = {MI_SEMAPHORE_SYNC_BR,
MI_SEMAPHORE_SYNC_BV,