On 7/18/2022 05:35, Tvrtko Ursulin wrote:
On 13/07/2022 00:31, John.C.Harrison@xxxxxxxxx wrote:
From: Matthew Brost <matthew.brost@xxxxxxxxx>
The GuC needs a copy of a golden context for implementing watchdog
resets (aka media resets). This context is larger on newer platforms.
So adjust the size being allocated/copied accordingly.
What were the consequences of this being too small? Media watchdog
reset broken impacting userspace? Platforms? Do we have an IGT
testcase? Do we need a Fixes: tag? Copy stable?
Yes. Not sure if we have an IGT for the media watchdog. I recall writing
something a long time back but I don't think it ever got merged due to
push back that I don't recall right now. And no because it only affects
DG2 onwards which is still forceprobed.
John.
Regards,
Tvrtko
Signed-off-by: Matthew Brost <matthew.brost@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
index ba7541f3ca610..74cbe8eaf5318 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
@@ -464,7 +464,11 @@ static void fill_engine_enable_masks(struct
intel_gt *gt,
}
#define LR_HW_CONTEXT_SIZE (80 * sizeof(u32))
-#define LRC_SKIP_SIZE (LRC_PPHWSP_SZ * PAGE_SIZE + LR_HW_CONTEXT_SIZE)
+#define XEHP_LR_HW_CONTEXT_SIZE (96 * sizeof(u32))
+#define LR_HW_CONTEXT_SZ(i915) (GRAPHICS_VER_FULL(i915) >=
IP_VER(12, 50) ? \
+ XEHP_LR_HW_CONTEXT_SIZE : \
+ LR_HW_CONTEXT_SIZE)
+#define LRC_SKIP_SIZE(i915) (LRC_PPHWSP_SZ * PAGE_SIZE +
LR_HW_CONTEXT_SZ(i915))
static int guc_prep_golden_context(struct intel_guc *guc)
{
struct intel_gt *gt = guc_to_gt(guc);
@@ -525,7 +529,7 @@ static int guc_prep_golden_context(struct
intel_guc *guc)
* on all engines).
*/
ads_blob_write(guc, ads.eng_state_size[guc_class],
- real_size - LRC_SKIP_SIZE);
+ real_size - LRC_SKIP_SIZE(gt->i915));
ads_blob_write(guc, ads.golden_context_lrca[guc_class],
addr_ggtt);
@@ -599,7 +603,7 @@ static void guc_init_golden_context(struct
intel_guc *guc)
}
GEM_BUG_ON(ads_blob_read(guc,
ads.eng_state_size[guc_class]) !=
- real_size - LRC_SKIP_SIZE);
+ real_size - LRC_SKIP_SIZE(gt->i915));
GEM_BUG_ON(ads_blob_read(guc,
ads.golden_context_lrca[guc_class]) != addr_ggtt);
addr_ggtt += alloc_size;
