This reverts commit 0b718ba1e884f64dce27c19311dd2859b87e56b9.
There are still some residual issues with asynchronous binding and
execution, but since commit 92581f9fb99c ("drm/i915: Immediately execute
the fenced work") we prefer not to use asynchronous binds, and the
remaining issues do not seem restricted to Cherryview [at least the ones
seen over a few dozen CI runs, less frequent issues are sure to be
discovered!]
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_lrc.c | 54 +++++++++++++++++++++++++++++
drivers/gpu/drm/i915/i915_pci.c | 2 +-
2 files changed, 55 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index 8e254f639751..b11e8f033774 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -3522,6 +3522,54 @@ static int gen8_emit_init_breadcrumb(struct i915_request *rq)
return 0;
}
+static int emit_pdps(struct i915_request *rq)
+{
+ const struct intel_engine_cs * const engine = rq->engine;
+ struct i915_ppgtt * const ppgtt = i915_vm_to_ppgtt(rq->context->vm);
+ int err, i;
+ u32 *cs;
+
+ GEM_BUG_ON(intel_vgpu_active(rq->i915));
+
+ /*
+ * Beware ye of the dragons, this sequence is magic!
+ *
+ * Small changes to this sequence can cause anything from
+ * GPU hangs to forcewake errors and machine lockups!
+ */
+
+ /* Flush any residual operations from the context load */
+ err = engine->emit_flush(rq, EMIT_FLUSH);
+ if (err)
+ return err;
+
+ /* Magic required to prevent forcewake errors! */
+ err = engine->emit_flush(rq, EMIT_INVALIDATE);
+ if (err)
+ return err;
+
+ cs = intel_ring_begin(rq, 4 * GEN8_3LVL_PDPES + 2);
+ if (IS_ERR(cs))
+ return PTR_ERR(cs);
+
+ /* Ensure the LRI have landed before we invalidate & continue */
+ *cs++ = MI_LOAD_REGISTER_IMM(2 * GEN8_3LVL_PDPES) | MI_LRI_FORCE_POSTED;
+ for (i = GEN8_3LVL_PDPES; i--; ) {
+ const dma_addr_t pd_daddr = i915_page_dir_dma_addr(ppgtt, i);
+ u32 base = engine->mmio_base;
+
+ *cs++ = i915_mmio_reg_offset(GEN8_RING_PDP_UDW(base, i));
+ *cs++ = upper_32_bits(pd_daddr);
+ *cs++ = i915_mmio_reg_offset(GEN8_RING_PDP_LDW(base, i));
+ *cs++ = lower_32_bits(pd_daddr);
+ }
+ *cs++ = MI_NOOP;
+
+ intel_ring_advance(rq, cs);
+
+ return 0;
+}
+
static int execlists_request_alloc(struct i915_request *request)
{
int ret;
@@ -3543,6 +3591,12 @@ static int execlists_request_alloc(struct i915_request *request)
* to cancel/unwind this request now.
*/
+ if (!i915_vm_is_4lvl(request->context->vm)) {
+ ret = emit_pdps(request);
+ if (ret)
+ return ret;
+ }
+
/* Unconditionally invalidate GPU caches and TLBs. */
ret = request->engine->emit_flush(request, EMIT_INVALIDATE);
if (ret)
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index 1faf9d6ec0a4..eb0b5be7c35d 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -615,7 +615,7 @@ static const struct intel_device_info chv_info = {
.has_logical_ring_contexts = 1,
.display.has_gmch = 1,
.dma_mask_size = 39,
- .ppgtt_type = INTEL_PPGTT_ALIASING,
+ .ppgtt_type = INTEL_PPGTT_FULL,
.ppgtt_size = 32,
.has_reset_engine = 1,
.has_snoop = true,
--
2.20.1
_______________________________________________
Intel-gfx mailing list
Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
