The benefit of only resetting a single engine is that we leave other
streams of userspace work intact across a hang; vital for process
isolation. We had wired up individual engine resets for gen6, but only
enabled it from gen8; now let's turn it on for the forgotten gen7. gen6
is still a mystery as how to unravel some global state that appears to
be reset along with an engine (in particular the ppgtt enabling in
GFX_MODE).
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_pci.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index 39608381b4a4..020b5f561f07 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -455,6 +455,7 @@ static const struct intel_device_info snb_m_gt2_info = {
.has_llc = 1, \
.has_rc6 = 1, \
.has_rc6p = 1, \
+ .has_reset_engine = true, \
.has_rps = true, \
.dma_mask_size = 40, \
.ppgtt_type = INTEL_PPGTT_ALIASING, \
@@ -513,6 +514,7 @@ static const struct intel_device_info vlv_info = {
.cpu_transcoder_mask = BIT(TRANSCODER_A) | BIT(TRANSCODER_B),
.has_runtime_pm = 1,
.has_rc6 = 1,
+ .has_reset_engine = true,
.has_rps = true,
.display.has_gmch = 1,
.display.has_hotplug = 1,
@@ -571,8 +573,7 @@ static const struct intel_device_info hsw_gt3_info = {
.dma_mask_size = 39, \
.ppgtt_type = INTEL_PPGTT_FULL, \
.ppgtt_size = 48, \
- .has_64bit_reloc = 1, \
- .has_reset_engine = 1
+ .has_64bit_reloc = 1
#define BDW_PLATFORM \
GEN8_FEATURES, \
--
2.20.1
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