[Intel-gfx] [PATCH v3 06/10] drm/i915: Implement LRI based FBC tracking
ville.syrjala at linux.intel.com
ville.syrjala at linux.intel.com
Wed Nov 6 22:02:21 CET 2013
From: Ville Syrjälä <ville.syrjala at linux.intel.com>
As per the SNB and HSW PM guides, we should enable FBC render/blitter
tracking only during batches targetting the front buffer.
On SNB we must also update the FBC render tracking address whenever it
changes. And since the register in question is stored in the context,
we need to make sure we reload it with correct data after context
switches.
On IVB/HSW we use the render nuke mechanism, so no render tracking
address updates are needed. Hoever on the blitter side we need to
enable the blitter tracking like on SNB, and in addition we need
to issue the cache clean messages, which we already did.
v2: Introduce intel_fb_obj_has_fbc()
Fix crtc locking around crtc->fb access
Drop a hunk that was included by accident in v1
Set fbc_address_dirty=false not true after emitting the LRI
v3: Now that fbc hangs on to the fb intel_fb_obj_has_fbc() doesn't
need to upset lockdep anymore
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
drivers/gpu/drm/i915/i915_gem_context.c | 7 ++++
drivers/gpu/drm/i915/i915_gem_execbuffer.c | 31 ++++++++++++++++
drivers/gpu/drm/i915/intel_display.c | 17 +++++++--
drivers/gpu/drm/i915/intel_drv.h | 1 +
drivers/gpu/drm/i915/intel_ringbuffer.c | 58 +++++++++++++++++++++++++++++-
drivers/gpu/drm/i915/intel_ringbuffer.h | 2 ++
6 files changed, 113 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 72a3df3..d438ea1 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -404,6 +404,13 @@ mi_set_context(struct intel_ring_buffer *ring,
intel_ring_advance(ring);
+ /*
+ * FBC RT address is stored in the context, so we may have just
+ * restored it to an old value. Make sure we emit a new LRI
+ * to update the address.
+ */
+ ring->fbc_address_dirty = true;
+
return ret;
}
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 885d595..db25158 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -886,6 +886,35 @@ validate_exec_list(struct drm_i915_gem_exec_object2 *exec,
}
static void
+i915_gem_execbuffer_mark_fbc_dirty(struct intel_ring_buffer *ring,
+ struct list_head *vmas)
+{
+ struct i915_vma *vma;
+ struct drm_i915_gem_object *fbc_obj = NULL;
+ u32 fbc_address = -1;
+
+ list_for_each_entry(vma, vmas, exec_list) {
+ struct drm_i915_gem_object *obj = vma->obj;
+
+ if (obj->base.pending_write_domain &&
+ intel_fb_obj_has_fbc(obj)) {
+ WARN_ON(fbc_obj && fbc_obj != obj);
+ fbc_obj = obj;
+ }
+ }
+
+ if (fbc_obj)
+ fbc_address = i915_gem_obj_ggtt_offset(fbc_obj);
+
+ /* need to nuke/cache_clean on IVB+? */
+ ring->fbc_dirty = fbc_obj != NULL;
+
+ /* need to update FBC tracking? */
+ ring->fbc_address_dirty = fbc_address != ring->fbc_address;
+ ring->fbc_address = fbc_address;
+}
+
+static void
i915_gem_execbuffer_move_to_active(struct list_head *vmas,
struct intel_ring_buffer *ring)
{
@@ -1150,6 +1179,8 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
if (flags & I915_DISPATCH_SECURE && !batch_obj->has_global_gtt_mapping)
i915_gem_gtt_bind_object(batch_obj, batch_obj->cache_level);
+ i915_gem_execbuffer_mark_fbc_dirty(ring, &eb->vmas);
+
ret = i915_gem_execbuffer_move_to_gpu(ring, &eb->vmas);
if (ret)
goto err;
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index bce6e07..c29e9d4 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -8074,6 +8074,21 @@ void intel_mark_idle(struct drm_device *dev)
gen6_rps_idle(dev->dev_private);
}
+bool intel_fb_obj_has_fbc(struct drm_i915_gem_object *obj)
+{
+ struct drm_device *dev = obj->base.dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ /* check for potential scanout */
+ if (!obj->pin_display)
+ return false;
+
+ if (!dev_priv->fbc.fb)
+ return false;
+
+ return to_intel_framebuffer(dev_priv->fbc.fb)->obj == obj;
+}
+
void intel_mark_fb_busy(struct drm_i915_gem_object *obj,
struct intel_ring_buffer *ring)
{
@@ -8091,8 +8106,6 @@ void intel_mark_fb_busy(struct drm_i915_gem_object *obj,
continue;
intel_increase_pllclock(crtc);
- if (ring && intel_fbc_enabled(dev))
- ring->fbc_dirty = true;
}
}
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 6d701e7..5c7e8b4 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -614,6 +614,7 @@ void intel_ddi_get_config(struct intel_encoder *encoder,
/* intel_display.c */
int intel_pch_rawclk(struct drm_device *dev);
void intel_mark_busy(struct drm_device *dev);
+bool intel_fb_obj_has_fbc(struct drm_i915_gem_object *obj);
void intel_mark_fb_busy(struct drm_i915_gem_object *obj,
struct intel_ring_buffer *ring);
void intel_mark_idle(struct drm_device *dev);
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 4649bf5..64fbab5 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -207,6 +207,57 @@ intel_emit_post_sync_nonzero_flush(struct intel_ring_buffer *ring)
return 0;
}
+static int gen6_blt_fbc_tracking(struct intel_ring_buffer *ring)
+{
+ int ret;
+
+ if (!ring->fbc_address_dirty)
+ return 0;
+
+ ret = intel_ring_begin(ring, 4);
+ if (ret)
+ return ret;
+
+ intel_ring_emit(ring, MI_NOOP);
+ intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1));
+ intel_ring_emit(ring, GEN6_BLITTER_ECOSKPD);
+ if (ring->fbc_address != -1)
+ intel_ring_emit(ring, _MASKED_BIT_ENABLE(GEN6_BLITTER_FBC_NOTIFY));
+ else
+ intel_ring_emit(ring, _MASKED_BIT_DISABLE(GEN6_BLITTER_FBC_NOTIFY));
+ intel_ring_advance(ring);
+
+ ring->fbc_address_dirty = false;
+
+ return 0;
+}
+
+static int gen6_render_fbc_tracking(struct intel_ring_buffer *ring)
+{
+ int ret;
+
+ if (!ring->fbc_address_dirty)
+ return 0;
+
+ ret = intel_ring_begin(ring, 4);
+ if (ret)
+ return ret;
+
+ intel_ring_emit(ring, MI_NOOP);
+ intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1));
+ intel_ring_emit(ring, ILK_FBC_RT_BASE);
+ if (ring->fbc_address != -1)
+ intel_ring_emit(ring, ring->fbc_address |
+ SNB_FBC_FRONT_BUFFER | ILK_FBC_RT_VALID);
+ else
+ intel_ring_emit(ring, 0);
+ intel_ring_advance(ring);
+
+ ring->fbc_address_dirty = false;
+
+ return 0;
+}
+
static int
gen6_render_ring_flush(struct intel_ring_buffer *ring,
u32 invalidate_domains, u32 flush_domains)
@@ -256,6 +307,9 @@ gen6_render_ring_flush(struct intel_ring_buffer *ring,
intel_ring_emit(ring, 0);
intel_ring_advance(ring);
+ if (invalidate_domains)
+ return gen6_render_fbc_tracking(ring);
+
return 0;
}
@@ -1839,7 +1893,9 @@ static int gen6_ring_flush(struct intel_ring_buffer *ring,
}
intel_ring_advance(ring);
- if (IS_GEN7(dev) && !invalidate && flush)
+ if (invalidate)
+ return gen6_blt_fbc_tracking(ring);
+ else if (flush && IS_GEN7(dev))
return gen7_ring_fbc_flush(ring, FBC_REND_CACHE_CLEAN);
return 0;
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 71a73f4..1e5bbd6 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -143,8 +143,10 @@ struct intel_ring_buffer {
*/
struct drm_i915_gem_request *preallocated_lazy_request;
u32 outstanding_lazy_seqno;
+ u32 fbc_address;
bool gpu_caches_dirty;
bool fbc_dirty;
+ bool fbc_address_dirty;
wait_queue_head_t irq_queue;
--
1.8.1.5
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