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drm/xe/vm: Add a couple of VM debug printouts

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Add debug printouts that are valueable for pagemap prefetch,
migration and page collection.

v2:
- Add additional debug prinouts around migration and page collection.
- Require CONFIG_DRM_XE_DEBUG_VM.

Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com> #v1
Link: https://patch.msgid.link/20251219113320.183860-18-thomas.hellstrom@linux.intel.com
This commit is contained in:
Thomas Hellström 2025-12-19 12:33:13 +01:00
parent 2df55d9e66
commit 54dc5842a8
2 changed files with 17 additions and 0 deletions
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10
drivers/gpu/drm/xe/xe_svm.c
View File

@ -1271,6 +1271,10 @@ static int __xe_svm_handle_pagefault(struct xe_vm *vm, struct xe_vma *vma,
if (err) {
range_debug(range, "PAGE FAULT - FAIL PAGE COLLECT");
goto out;
} else if (IS_ENABLED(CONFIG_DRM_XE_DEBUG_VM)) {
drm_dbg(&vm->xe->drm, "After page collect data location is %sin \"%s\".\n",
xe_svm_range_has_pagemap(range, dpagemap) ? "" : "NOT ",
dpagemap ? dpagemap->drm->unique : "System.");
}
xe_svm_range_get_pages_us_stats_incr(gt, range, get_pages_start);
@ -1566,9 +1570,15 @@ struct drm_pagemap *xe_vma_resolve_pagemap(struct xe_vma *vma, struct xe_tile *t
int xe_svm_alloc_vram(struct xe_svm_range *range, const struct drm_gpusvm_ctx *ctx,
struct drm_pagemap *dpagemap)
{
struct xe_device *xe = range_to_vm(&range->base)->xe;
xe_assert(range_to_vm(&range->base)->xe, range->base.pages.flags.migrate_devmem);
range_debug(range, "ALLOCATE VRAM");
if (IS_ENABLED(CONFIG_DRM_XE_DEBUG_VM))
drm_dbg(&xe->drm, "Request migration to device memory on \"%s\".\n",
dpagemap->drm->unique);
return drm_pagemap_populate_mm(dpagemap, xe_svm_range_start(range),
xe_svm_range_end(range),
range->base.gpusvm->mm,

7
drivers/gpu/drm/xe/xe_vm.c
View File

@ -2931,6 +2931,13 @@ static int prefetch_ranges(struct xe_vm *vm, struct xe_vma_op *op)
if (!dpagemap)
xe_svm_range_migrate_to_smem(vm, svm_range);
if (IS_ENABLED(CONFIG_DRM_XE_DEBUG_VM)) {
drm_dbg(&vm->xe->drm,
"Prefetch pagemap is %s start 0x%016lx end 0x%016lx\n",
dpagemap ? dpagemap->drm->unique : "system",
xe_svm_range_start(svm_range), xe_svm_range_end(svm_range));
}
if (xe_svm_range_needs_migrate_to_vram(svm_range, vma, dpagemap)) {
err = xe_svm_alloc_vram(svm_range, &ctx, dpagemap);
if (err) {