On 12/04/2021 10:05, Matthew Auld wrote:
It's a requirement that for dgfx we place all the paging structures in
device local-memory.
Signed-off-by: Matthew Auld <matthew.auld@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/gen8_ppgtt.c | 5 ++++-
drivers/gpu/drm/i915/gt/intel_gtt.c | 27 +++++++++++++++++++++++++--
drivers/gpu/drm/i915/gt/intel_gtt.h | 1 +
3 files changed, 30 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/gen8_ppgtt.c b/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
index f83496836f0f..11fb5df45a0f 100644
--- a/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
+++ b/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
@@ -712,7 +712,10 @@ struct i915_ppgtt *gen8_ppgtt_create(struct intel_gt *gt)
*/
ppgtt->vm.has_read_only = !IS_GEN_RANGE(gt->i915, 11, 12);
- ppgtt->vm.alloc_pt_dma = alloc_pt_dma;
+ if (HAS_LMEM(gt->i915))
+ ppgtt->vm.alloc_pt_dma = alloc_pt_lmem;
+ else
+ ppgtt->vm.alloc_pt_dma = alloc_pt_dma;
err = gen8_init_scratch(&ppgtt->vm);
if (err)
diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.c b/drivers/gpu/drm/i915/gt/intel_gtt.c
index d386b89e2758..1eeeab45445c 100644
--- a/drivers/gpu/drm/i915/gt/intel_gtt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gtt.c
@@ -7,10 +7,23 @@
#include <linux/fault-inject.h>
+#include "gem/i915_gem_lmem.h"
#include "i915_trace.h"
#include "intel_gt.h"
#include "intel_gtt.h"
+struct drm_i915_gem_object *alloc_pt_lmem(struct i915_address_space *vm, int sz)
+{
+ struct drm_i915_gem_object *obj;
+
+ obj = i915_gem_object_create_lmem(vm->i915, sz, 0);
+
+ /* ensure all dma objects have the same reservation class */
+ if (!IS_ERR(obj))
+ obj->base.resv = &vm->resv;
+ return obj;
+}
+
struct drm_i915_gem_object *alloc_pt_dma(struct i915_address_space *vm, int sz)
{
struct drm_i915_gem_object *obj;
@@ -27,9 +40,14 @@ struct drm_i915_gem_object *alloc_pt_dma(struct i915_address_space *vm, int sz)
int map_pt_dma(struct i915_address_space *vm, struct drm_i915_gem_object *obj)
{
+ enum i915_map_type type;
void *vaddr;
- vaddr = i915_gem_object_pin_map_unlocked(obj, I915_MAP_WB);
+ type = I915_MAP_WB;
+ if (i915_gem_object_is_lmem(obj))
+ type = I915_MAP_WC;
Not trusting the "always coherent" helper from earlier in the series?
Regards,
Tvrtko
+
+ vaddr = i915_gem_object_pin_map_unlocked(obj, type);
if (IS_ERR(vaddr))
return PTR_ERR(vaddr);
@@ -39,9 +57,14 @@ int map_pt_dma(struct i915_address_space *vm, struct drm_i915_gem_object *obj)
int map_pt_dma_locked(struct i915_address_space *vm, struct drm_i915_gem_object *obj)
{
+ enum i915_map_type type;
void *vaddr;
- vaddr = i915_gem_object_pin_map(obj, I915_MAP_WB);
+ type = I915_MAP_WB;
+ if (i915_gem_object_is_lmem(obj))
+ type = I915_MAP_WC;
+
+ vaddr = i915_gem_object_pin_map(obj, type);
if (IS_ERR(vaddr))
return PTR_ERR(vaddr);
diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.h b/drivers/gpu/drm/i915/gt/intel_gtt.h
index 40e486704558..44ce27c51631 100644
--- a/drivers/gpu/drm/i915/gt/intel_gtt.h
+++ b/drivers/gpu/drm/i915/gt/intel_gtt.h
@@ -527,6 +527,7 @@ int setup_scratch_page(struct i915_address_space *vm);
void free_scratch(struct i915_address_space *vm);
struct drm_i915_gem_object *alloc_pt_dma(struct i915_address_space *vm, int sz);
+struct drm_i915_gem_object *alloc_pt_lmem(struct i915_address_space *vm, int sz);
struct i915_page_table *alloc_pt(struct i915_address_space *vm);
struct i915_page_directory *alloc_pd(struct i915_address_space *vm);
struct i915_page_directory *__alloc_pd(int npde);
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