> -----Original Message-----
> From: Intel-gfx <intel-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of
> Ramalingam C
> Sent: Wednesday, November 6, 2019 8:08 AM
> To: intel-gfx <intel-gfx@xxxxxxxxxxxxxxxxxxxxx>; Chris Wilson <chris@chris-
> wilson.co.uk>
> Cc: Auld, Matthew <matthew.auld@xxxxxxxxx>
> Subject: [PATCH v4 1/2] drm/i915: lookup for mem_region of a
> mem_type
>
> Lookup function to retrieve the pointer to a memory region of a mem_type.
We could have multi-regions with the same memory type. Your code just returns the first one. Is this desired?
--CQ
>
> Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
> cc: Matthew Auld <matthew.auld@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_memory_region.c | 12 ++++++++++++
> drivers/gpu/drm/i915/intel_memory_region.h | 3 +++
> 2 files changed, 15 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_memory_region.c
> b/drivers/gpu/drm/i915/intel_memory_region.c
> index baaeaecc64af..ae899df7a1c2 100644
> --- a/drivers/gpu/drm/i915/intel_memory_region.c
> +++ b/drivers/gpu/drm/i915/intel_memory_region.c
> @@ -16,6 +16,18 @@ const u32 intel_region_map[] = {
> [INTEL_REGION_STOLEN] = REGION_MAP(INTEL_MEMORY_STOLEN,
> 0), };
>
> +struct intel_memory_region *
> +intel_memory_region_lookup(struct drm_i915_private *i915,
> + enum intel_memory_type mem_type)
> +{
> + enum intel_region_id id;
> +
> + for (id = INTEL_REGION_SMEM; id < INTEL_REGION_UNKNOWN;
> id++)
> + if (i915->mm.regions[id]->type == mem_type)
> + return i915->mm.regions[id];
> + return NULL;
> +}
> +
> static u64
> intel_memory_region_free_pages(struct intel_memory_region *mem,
> struct list_head *blocks)
> diff --git a/drivers/gpu/drm/i915/intel_memory_region.h
> b/drivers/gpu/drm/i915/intel_memory_region.h
> index 238722009677..d210936c4d72 100644
> --- a/drivers/gpu/drm/i915/intel_memory_region.h
> +++ b/drivers/gpu/drm/i915/intel_memory_region.h
> @@ -125,5 +125,8 @@ void intel_memory_region_put(struct
> intel_memory_region *mem);
>
> int intel_memory_regions_hw_probe(struct drm_i915_private *i915); void
> intel_memory_regions_driver_release(struct drm_i915_private *i915);
> +struct intel_memory_region *
> +intel_memory_region_lookup(struct drm_i915_private *i915,
> + enum intel_memory_type mem_type);
>
> #endif
> --
> 2.20.1
>
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