[Intel-gfx] [PATCH v3 1/8] drm/i915/migrate: don't check the scratch page

Matthew Auld
2021-12-06T13:32:38Z

The scratch page might not be allocated in LMEM(like on DG2), so instead
of using that as the deciding factor for where the paging structures
live, let's just query the pt before mapping it.

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Ramalingam C <ramalingam.c@intel.com>
---
drivers/gpu/drm/i915/gt/intel_migrate.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_migrate.c b/drivers/gpu/drm/i915/gt/intel_migrate.c
index 765c6d48fe52..2d3188a398dd 100644
--- a/drivers/gpu/drm/i915/gt/intel_migrate.c
+++ b/drivers/gpu/drm/i915/gt/intel_migrate.c
@@ -13,7 +13,6 @@

struct insert_pte_data {
u64 offset;
- bool is_lmem;
};

#define CHUNK_SZ SZ_8M /* ~1ms at 8GiB/s preemption delay */
@@ -41,7 +40,7 @@ static void insert_pte(struct i915_address_space *vm,
struct insert_pte_data *d = data;

vm->insert_page(vm, px_dma(pt), d->offset, I915_CACHE_NONE,
- d->is_lmem ? PTE_LM : 0);
+ i915_gem_object_is_lmem(pt->base) ? PTE_LM : 0);
d->offset += PAGE_SIZE;
}

@@ -135,7 +134,6 @@ static struct i915_address_space *migrate_vm(struct intel_gt *gt)
goto err_vm;

/* Now allow the GPU to rewrite the PTE via its own ppGTT */
- d.is_lmem = i915_gem_object_is_lmem(vm->vm.scratch[0]);
vm->vm.foreach(&vm->vm, base, base + sz, insert_pte, &d);
}

--
2.31.1