For discrete, use TTM for both cached and WC system memory. That means
we currently rely on the TTM memory accounting / shrinker. For cached
system memory we should consider remaining shmem-backed, which can be
implemented from our ttm_tt_populate callback. We can then also reuse our
own very elaborate shrinker for that memory.
Signed-off-by: Thomas Hellström <thomas.hellstrom@xxxxxxxxxxxxxxx>
Reviewed-by: Matthew Auld <matthew.auld@xxxxxxxxx>
---
v2:
- Fix IS_ERR_OR_NULL() check to IS_ERR() (Reported by Matthew Auld)
v3:
- Commit message typo fix
---
drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 22 ++++++++++++++++++++++
drivers/gpu/drm/i915/i915_drv.h | 3 ---
drivers/gpu/drm/i915/intel_memory_region.c | 7 ++++++-
drivers/gpu/drm/i915/intel_memory_region.h | 8 ++++++++
4 files changed, 36 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
index 33213be45050..1fb32593b2f0 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
@@ -756,3 +756,25 @@ int __i915_gem_ttm_object_init(struct intel_memory_region *mem,
/* i915 wants -ENXIO when out of memory region space. */
return (ret == -ENOSPC) ? -ENXIO : ret;
}
+
+static const struct intel_memory_region_ops ttm_system_region_ops = {
+ .init_object = __i915_gem_ttm_object_init,
+};
+
+struct intel_memory_region *
+i915_gem_ttm_system_setup(struct drm_i915_private *i915,
+ u16 type, u16 instance)
+{
+ struct intel_memory_region *mr;
+
+ mr = intel_memory_region_create(i915, 0,
+ totalram_pages() << PAGE_SHIFT,
+ PAGE_SIZE, 0,
+ type, instance,
+ &ttm_system_region_ops);
+ if (IS_ERR(mr))
+ return mr;
+
+ intel_memory_region_set_name(mr, "system-ttm");
+ return mr;
+}
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 38ff2fb89744..9643bebb951d 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1751,9 +1751,6 @@ void i915_gem_cleanup_userptr(struct drm_i915_private *dev_priv);
void i915_gem_init_early(struct drm_i915_private *dev_priv);
void i915_gem_cleanup_early(struct drm_i915_private *dev_priv);
-struct intel_memory_region *i915_gem_shmem_setup(struct drm_i915_private *i915,
- u16 type, u16 instance);
-
static inline void i915_gem_drain_freed_objects(struct drm_i915_private *i915)
{
/*
diff --git a/drivers/gpu/drm/i915/intel_memory_region.c b/drivers/gpu/drm/i915/intel_memory_region.c
index 12fb5423fd5e..0b016bdb8b84 100644
--- a/drivers/gpu/drm/i915/intel_memory_region.c
+++ b/drivers/gpu/drm/i915/intel_memory_region.c
@@ -220,7 +220,12 @@ int intel_memory_regions_hw_probe(struct drm_i915_private *i915)
instance = intel_region_map[i].instance;
switch (type) {
case INTEL_MEMORY_SYSTEM:
- mem = i915_gem_shmem_setup(i915, type, instance);
+ if (IS_DGFX(i915))
+ mem = i915_gem_ttm_system_setup(i915, type,
+ instance);
+ else
+ mem = i915_gem_shmem_setup(i915, type,
+ instance);
break;
case INTEL_MEMORY_STOLEN_LOCAL:
mem = i915_gem_stolen_lmem_setup(i915, type, instance);
diff --git a/drivers/gpu/drm/i915/intel_memory_region.h b/drivers/gpu/drm/i915/intel_memory_region.h
index c7e635d62e1a..1a2bb9fc9de5 100644
--- a/drivers/gpu/drm/i915/intel_memory_region.h
+++ b/drivers/gpu/drm/i915/intel_memory_region.h
@@ -143,4 +143,12 @@ void intel_memory_region_unreserve(struct intel_memory_region *mem);
int intel_memory_region_reserve(struct intel_memory_region *mem,
resource_size_t offset,
resource_size_t size);
+
+struct intel_memory_region *
+i915_gem_ttm_system_setup(struct drm_i915_private *i915,
+ u16 type, u16 instance);
+struct intel_memory_region *
+i915_gem_shmem_setup(struct drm_i915_private *i915,
+ u16 type, u16 instance);
+
#endif
--
2.31.1
