[PATCH 4/5] drm/amdgpu: cleanup amdgpu_bo_pin_restricted

[zhoucm1]

On 2017年09月12日 23:59, Deucher, Alexander wrote:
>> -----Original Message-----
>> From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf
>> Of Christian König
>> Sent: Tuesday, September 12, 2017 5:09 AM
>> To: amd-gfx at lists.freedesktop.org
>> Subject: [PATCH 4/5] drm/amdgpu: cleanup amdgpu_bo_pin_restricted
>>
>> From: Christian König <christian.koenig at amd.com>
>>
>> Nobody is using the min/max interface any more.
>>
>> Signed-off-by: Christian König <christian.koenig at amd.com>
> I'm not sure it's a good idea to get rid of this.  I can see a need to reserve memory at specific offsets in memory.  Specifically I think SR-IOV will be placing structures in memory to communicate configuration details from the host to the guest.  Also, we should be reserving the vbios scratch area, but we don't currently.
Yes, if our ISP ip is enabled, this reserve memory is must.

David Zhou
>
> Alex
>
>> ---
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 39 +++++------------------
>> -------
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_object.h |  3 ---
>>   2 files changed, 6 insertions(+), 36 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>> index 726a662..8a8add3 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>> @@ -629,20 +629,15 @@ void amdgpu_bo_unref(struct amdgpu_bo **bo)
>>   		*bo = NULL;
>>   }
>>
>> -int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32 domain,
>> -			     u64 min_offset, u64 max_offset,
>> -			     u64 *gpu_addr)
>> +int amdgpu_bo_pin(struct amdgpu_bo *bo, u32 domain, u64 *gpu_addr)
>>   {
>>   	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
>> +	unsigned lpfn;
>>   	int r, i;
>> -	unsigned fpfn, lpfn;
>>
>>   	if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm))
>>   		return -EPERM;
>>
>> -	if (WARN_ON_ONCE(min_offset > max_offset))
>> -		return -EINVAL;
>> -
>>   	/* A shared bo cannot be migrated to VRAM */
>>   	if (bo->prime_shared_count && (domain ==
>> AMDGPU_GEM_DOMAIN_VRAM))
>>   		return -EINVAL;
>> @@ -657,12 +652,6 @@ int amdgpu_bo_pin_restricted(struct amdgpu_bo
>> *bo, u32 domain,
>>   		if (gpu_addr)
>>   			*gpu_addr = amdgpu_bo_gpu_offset(bo);
>>
>> -		if (max_offset != 0) {
>> -			u64 domain_start = bo->tbo.bdev-
>>> man[mem_type].gpu_offset;
>> -			WARN_ON_ONCE(max_offset <
>> -				     (amdgpu_bo_gpu_offset(bo) -
>> domain_start));
>> -		}
>> -
>>   		return 0;
>>   	}
>>
>> @@ -671,23 +660,12 @@ int amdgpu_bo_pin_restricted(struct amdgpu_bo
>> *bo, u32 domain,
>>   	for (i = 0; i < bo->placement.num_placement; i++) {
>>   		/* force to pin into visible video ram */
>>   		if ((bo->placements[i].flags & TTM_PL_FLAG_VRAM) &&
>> -		    !(bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)
>> &&
>> -		    (!max_offset || max_offset >
>> -		     adev->mc.visible_vram_size)) {
>> -			if (WARN_ON_ONCE(min_offset >
>> -					 adev->mc.visible_vram_size))
>> -				return -EINVAL;
>> -			fpfn = min_offset >> PAGE_SHIFT;
>> +		    !(bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS))
>> {
>>   			lpfn = adev->mc.visible_vram_size >> PAGE_SHIFT;
>> -		} else {
>> -			fpfn = min_offset >> PAGE_SHIFT;
>> -			lpfn = max_offset >> PAGE_SHIFT;
>> +			if (!bo->placements[i].lpfn ||
>> +			    (lpfn && lpfn < bo->placements[i].lpfn))
>> +				bo->placements[i].lpfn = lpfn;
>>   		}
>> -		if (fpfn > bo->placements[i].fpfn)
>> -			bo->placements[i].fpfn = fpfn;
>> -		if (!bo->placements[i].lpfn ||
>> -		    (lpfn && lpfn < bo->placements[i].lpfn))
>> -			bo->placements[i].lpfn = lpfn;
>>   		bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
>>   	}
>>
>> @@ -718,11 +696,6 @@ int amdgpu_bo_pin_restricted(struct amdgpu_bo
>> *bo, u32 domain,
>>   	return r;
>>   }
>>
>> -int amdgpu_bo_pin(struct amdgpu_bo *bo, u32 domain, u64 *gpu_addr)
>> -{
>> -	return amdgpu_bo_pin_restricted(bo, domain, 0, 0, gpu_addr);
>> -}
>> -
>>   int amdgpu_bo_unpin(struct amdgpu_bo *bo)
>>   {
>>   	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
>> index 39b6bf6..4b2c042 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
>> @@ -211,9 +211,6 @@ void amdgpu_bo_kunmap(struct amdgpu_bo *bo);
>>   struct amdgpu_bo *amdgpu_bo_ref(struct amdgpu_bo *bo);
>>   void amdgpu_bo_unref(struct amdgpu_bo **bo);
>>   int amdgpu_bo_pin(struct amdgpu_bo *bo, u32 domain, u64 *gpu_addr);
>> -int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32 domain,
>> -			     u64 min_offset, u64 max_offset,
>> -			     u64 *gpu_addr);
>>   int amdgpu_bo_unpin(struct amdgpu_bo *bo);
>>   int amdgpu_bo_evict_vram(struct amdgpu_device *adev);
>>   int amdgpu_bo_init(struct amdgpu_device *adev);
>> --
>> 2.7.4
>>
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