diff options
| author |   Matthew Brost <matthew.brost@intel.com> | 2025-04-08 08:59:15 -0700 |
|---|---|---|
| committer |   Lucas De Marchi <lucas.demarchi@intel.com> | 2025-05-08 12:44:20 -0700 |
| commit | 391008f34e711253c5983b0bf52277cc43723127 (patch) | |
| tree | 17b45fb9845cbb8b89a0bfce7d1c7da1debb9f35 | |
| parent | Linux 6.15-rc5 (diff) | |
| download | wireguard-linux-391008f34e711253c5983b0bf52277cc43723127.tar.xz wireguard-linux-391008f34e711253c5983b0bf52277cc43723127.zip | |
drm/xe: Add page queue multiplier
For an unknown reason the math to determine the PF queue size does is
not correct - compute UMD applications are overflowing the PF queue
which is fatal. A multippier of 8 fixes the problem.
Fixes: 3338e4f90c14 ("drm/xe: Use topology to determine page fault queue size")
Cc: stable@vger.kernel.org
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Jagmeet Randhawa <jagmeet.randhawa@intel.com>
Link: https://lore.kernel.org/r/20250408155915.78770-1-matthew.brost@intel.com
(cherry picked from commit 29582e0ea75c95668d168b12406e3c56cf5a73c4)
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/gpu/drm/xe/xe_gt_pagefault.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/gpu/drm/xe/xe_gt_pagefault.c b/drivers/gpu/drm/xe/xe_gt_pagefault.c index c5ad9a0a89c2..0c22b3a36655 100644 --- a/drivers/gpu/drm/xe/xe_gt_pagefault.c +++ b/drivers/gpu/drm/xe/xe_gt_pagefault.c @@ -435,9 +435,16 @@ static int xe_alloc_pf_queue(struct xe_gt *gt, struct pf_queue *pf_queue) num_eus = bitmap_weight(gt->fuse_topo.eu_mask_per_dss, XE_MAX_EU_FUSE_BITS) * num_dss; - /* user can issue separate page faults per EU and per CS */ + /* + * user can issue separate page faults per EU and per CS + * + * XXX: Multiplier required as compute UMD are getting PF queue errors + * without it. Follow on why this multiplier is required. + */ +#define PF_MULTIPLIER 8 pf_queue->num_dw = - (num_eus + XE_NUM_HW_ENGINES) * PF_MSG_LEN_DW; + (num_eus + XE_NUM_HW_ENGINES) * PF_MSG_LEN_DW * PF_MULTIPLIER; +#undef PF_MULTIPLIER pf_queue->gt = gt; pf_queue->data = devm_kcalloc(xe->drm.dev, pf_queue->num_dw, |