RE: [PATCH 01/13] drm/ttm: nuke ttm_tt_set_(un)populated again

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[AMD Public Use]

-----Original Message-----
From: Chauhan, Madhav 
Sent: Tuesday, October 27, 2020 12:57 AM
To: Koenig, Christian <Christian.Koenig@xxxxxxx>; dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: Huang, Ray <Ray.Huang@xxxxxxx>
Subject: RE: [PATCH 01/13] drm/ttm: nuke ttm_tt_set_(un)populated again

[AMD Public Use]

-----Original Message-----
From: Christian König <ckoenig.leichtzumerken@xxxxxxxxx>
Sent: Monday, October 26, 2020 7:14 PM
To: Chauhan, Madhav <Madhav.Chauhan@xxxxxxx>; dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: Huang, Ray <Ray.Huang@xxxxxxx>
Subject: Re: [PATCH 01/13] drm/ttm: nuke ttm_tt_set_(un)populated again

Am 26.10.20 um 14:36 schrieb Chauhan, Madhav:
> [AMD Public Use]
>
> -----Original Message-----
> From: Christian König <ckoenig.leichtzumerken@xxxxxxxxx>
> Sent: Sunday, October 25, 2020 9:11 PM
> To: Chauhan, Madhav <Madhav.Chauhan@xxxxxxx>; 
> dri-devel@xxxxxxxxxxxxxxxxxxxxx
> Cc: Huang, Ray <Ray.Huang@xxxxxxx>
> Subject: [PATCH 01/13] drm/ttm: nuke ttm_tt_set_(un)populated again
>
> Neither page allocation backend nor the driver should mess with that.
>
> Looks fine to me: Reviewed-by: Madhav Chauhan <madhav.chauhan@xxxxxxx>

Just for this patch or the series?

Complete series looks good to me now.  Series, Reviewed-by: Madhav Chauhan <madhav.chauhan@xxxxxxx>

Will be doing MHT 3.0/3.1 offscreen/regression analysis to find the impact of this optimized allocator and update If found any issues.

Tested this new allocator thoroughly with Raven Ridge APU, Navi 14 dGPU. Results:
1. No regression/BO allocation error observed while running LIBDRM testapps
2. MHT 3.0/3.1 1080P offscreen results are at par/similar with old allocator.

Regards,
Madhav

Regards,
Madhav

Christian.

>
> Signed-off-by: Christian König <christian.koenig@xxxxxxx>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c  |  2 --
>   drivers/gpu/drm/nouveau/nouveau_bo.c     |  1 -
>   drivers/gpu/drm/radeon/radeon_ttm.c      |  2 --
>   drivers/gpu/drm/ttm/ttm_page_alloc.c     |  2 --
>   drivers/gpu/drm/ttm/ttm_page_alloc_dma.c |  2 --
>   drivers/gpu/drm/ttm/ttm_tt.c             | 11 +++++++----
>   include/drm/ttm/ttm_tt.h                 | 10 ----------
>   7 files changed, 7 insertions(+), 23 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c 
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> index 62f9194b1dd1..169468572930 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> @@ -1363,7 +1363,6 @@ static int amdgpu_ttm_tt_populate(struct ttm_bo_device *bdev,
>   			return -ENOMEM;
>   
>   		ttm->page_flags |= TTM_PAGE_FLAG_SG;
> -		ttm_tt_set_populated(ttm);
>   		return 0;
>   	}
>   
> @@ -1383,7 +1382,6 @@ static int amdgpu_ttm_tt_populate(struct ttm_bo_device *bdev,
>   		drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
>   						 gtt->ttm.dma_address,
>   						 ttm->num_pages);
> -		ttm_tt_set_populated(ttm);
>   		return 0;
>   	}
>   
> diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c 
> b/drivers/gpu/drm/nouveau/nouveau_bo.c
> index acff82afe260..06a1f4c4e96e 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_bo.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
> @@ -1321,7 +1321,6 @@ nouveau_ttm_tt_populate(struct ttm_bo_device *bdev,
>   		/* make userspace faulting work */
>   		drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
>   						 ttm_dma->dma_address, ttm->num_pages);
> -		ttm_tt_set_populated(ttm);
>   		return 0;
>   	}
>   
> diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c 
> b/drivers/gpu/drm/radeon/radeon_ttm.c
> index 321c09d20c6c..75fa2f55186b 100644
> --- a/drivers/gpu/drm/radeon/radeon_ttm.c
> +++ b/drivers/gpu/drm/radeon/radeon_ttm.c
> @@ -670,14 +670,12 @@ static int radeon_ttm_tt_populate(struct ttm_bo_device *bdev,
>   			return -ENOMEM;
>   
>   		ttm->page_flags |= TTM_PAGE_FLAG_SG;
> -		ttm_tt_set_populated(ttm);
>   		return 0;
>   	}
>   
>   	if (slave && ttm->sg) {
>   		drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
>   						 gtt->ttm.dma_address, ttm->num_pages);
> -		ttm_tt_set_populated(ttm);
>   		return 0;
>   	}
>   
> diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c 
> b/drivers/gpu/drm/ttm/ttm_page_alloc.c
> index c8f6790962b9..04099dddce16 100644
> --- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
> +++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
> @@ -1041,7 +1041,6 @@ ttm_pool_unpopulate_helper(struct ttm_tt *ttm, unsigned mem_count_update)
>   put_pages:
>   	ttm_put_pages(ttm->pages, ttm->num_pages, ttm->page_flags,
>   		      ttm->caching);
> -	ttm_tt_set_unpopulated(ttm);
>   }
>   
>   int ttm_pool_populate(struct ttm_tt *ttm, struct ttm_operation_ctx *ctx) @@ -1080,7 +1079,6 @@ int ttm_pool_populate(struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)
>   		}
>   	}
>   
> -	ttm_tt_set_populated(ttm);
>   	return 0;
>   }
>   EXPORT_SYMBOL(ttm_pool_populate);
> diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c 
> b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
> index 6625b43f6256..85dad69419f6 100644
> --- a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
> +++ b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
> @@ -983,7 +983,6 @@ int ttm_dma_populate(struct ttm_dma_tt *ttm_dma, struct device *dev,
>   		}
>   	}
>   
> -	ttm_tt_set_populated(ttm);
>   	return 0;
>   }
>   EXPORT_SYMBOL_GPL(ttm_dma_populate);
> @@ -1077,7 +1076,6 @@ void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma, struct device *dev)
>   	/* shrink pool if necessary (only on !is_cached pools)*/
>   	if (npages)
>   		ttm_dma_page_pool_free(pool, npages, false);
> -	ttm_tt_set_unpopulated(ttm);
>   }
>   EXPORT_SYMBOL_GPL(ttm_dma_unpopulate);
>   
> diff --git a/drivers/gpu/drm/ttm/ttm_tt.c 
> b/drivers/gpu/drm/ttm/ttm_tt.c index 3e5dd6271d4c..beb1e878fed9 100644
> --- a/drivers/gpu/drm/ttm/ttm_tt.c
> +++ b/drivers/gpu/drm/ttm/ttm_tt.c
> @@ -138,7 +138,6 @@ static void ttm_tt_init_fields(struct ttm_tt *ttm,
>   	ttm->num_pages = bo->num_pages;
>   	ttm->caching = ttm_cached;
>   	ttm->page_flags = page_flags;
> -	ttm_tt_set_unpopulated(ttm);
>   	ttm->swap_storage = NULL;
>   	ttm->sg = bo->sg;
>   	ttm->caching = caching;
> @@ -334,9 +333,12 @@ int ttm_tt_populate(struct ttm_bo_device *bdev,
>   		ret = bdev->driver->ttm_tt_populate(bdev, ttm, ctx);
>   	else
>   		ret = ttm_pool_populate(ttm, ctx);
> -	if (!ret)
> -		ttm_tt_add_mapping(bdev, ttm);
> -	return ret;
> +	if (ret)
> +		return ret;
> +
> +	ttm_tt_add_mapping(bdev, ttm);
> +	ttm->page_flags |= TTM_PAGE_FLAG_PRIV_POPULATED;
> +	return 0;
>   }
>   EXPORT_SYMBOL(ttm_tt_populate);
>   
> @@ -365,4 +367,5 @@ void ttm_tt_unpopulate(struct ttm_bo_device *bdev,
>   		bdev->driver->ttm_tt_unpopulate(bdev, ttm);
>   	else
>   		ttm_pool_unpopulate(ttm);
> +	ttm->page_flags &= ~TTM_PAGE_FLAG_PRIV_POPULATED;
>   }
> diff --git a/include/drm/ttm/ttm_tt.h b/include/drm/ttm/ttm_tt.h index 
> e042dec5e6c1..e3e60c1da754 100644
> --- a/include/drm/ttm/ttm_tt.h
> +++ b/include/drm/ttm/ttm_tt.h
> @@ -72,16 +72,6 @@ static inline bool ttm_tt_is_populated(struct ttm_tt *tt)
>   	return tt->page_flags & TTM_PAGE_FLAG_PRIV_POPULATED;  }
>   
> -static inline void ttm_tt_set_unpopulated(struct ttm_tt *tt) -{
> -	tt->page_flags &= ~TTM_PAGE_FLAG_PRIV_POPULATED;
> -}
> -
> -static inline void ttm_tt_set_populated(struct ttm_tt *tt) -{
> -	tt->page_flags |= TTM_PAGE_FLAG_PRIV_POPULATED;
> -}
> -
>   /**
>    * struct ttm_dma_tt
>    *
> --
> 2.17.1
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