[PATCH v7 08/10] drm/i915: allow memory region creators to alloc and free the region

From: Robert Beckett
Date: Mon Jun 20 2022 - 17:34:52 EST


add callbacks for alloc and free.
this allows region creators to allocate any extra storage they may
require.

Signed-off-by: Robert Beckett <bob.beckett@xxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_memory_region.c | 16 +++++++++++++---
drivers/gpu/drm/i915/intel_memory_region.h | 2 ++
2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_memory_region.c b/drivers/gpu/drm/i915/intel_memory_region.c
index e38d2db1c3e3..3da07a712f90 100644
--- a/drivers/gpu/drm/i915/intel_memory_region.c
+++ b/drivers/gpu/drm/i915/intel_memory_region.c
@@ -231,7 +231,10 @@ intel_memory_region_create(struct drm_i915_private *i915,
struct intel_memory_region *mem;
int err;

- mem = kzalloc(sizeof(*mem), GFP_KERNEL);
+ if (ops->alloc)
+ mem = ops->alloc();
+ else
+ mem = kzalloc(sizeof(*mem), GFP_KERNEL);
if (!mem)
return ERR_PTR(-ENOMEM);

@@ -265,7 +268,10 @@ intel_memory_region_create(struct drm_i915_private *i915,
if (mem->ops->release)
mem->ops->release(mem);
err_free:
- kfree(mem);
+ if (mem->ops->free)
+ mem->ops->free(mem);
+ else
+ kfree(mem);
return ERR_PTR(err);
}

@@ -288,7 +294,11 @@ void intel_memory_region_destroy(struct intel_memory_region *mem)

GEM_WARN_ON(!list_empty_careful(&mem->objects.list));
mutex_destroy(&mem->objects.lock);
- if (!ret)
+ if (ret)
+ return;
+ if (mem->ops->free)
+ mem->ops->free(mem);
+ else
kfree(mem);
}

diff --git a/drivers/gpu/drm/i915/intel_memory_region.h b/drivers/gpu/drm/i915/intel_memory_region.h
index 3d8378c1b447..048955b5429f 100644
--- a/drivers/gpu/drm/i915/intel_memory_region.h
+++ b/drivers/gpu/drm/i915/intel_memory_region.h
@@ -61,6 +61,8 @@ struct intel_memory_region_ops {
resource_size_t size,
resource_size_t page_size,
unsigned int flags);
+ struct intel_memory_region *(*alloc)(void);
+ void (*free)(struct intel_memory_region *mem);
};

struct intel_memory_region {
--
2.25.1