Re: [Intel-gfx] [PATCH 18/19] drm/i915/gtt: map the PD up front

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On Mon, Apr 12, 2021 at 10:05:25AM +0100, Matthew Auld wrote:
> We need to general our accessor for the page directories and tables from
> using the simple kmap_atomic to support local memory, and this setup
> must be done on acquisition of the backing storage prior to entering
> fence execution contexts. Here we replace the kmap with the object
> maping code that for simple single page shmemfs object will return a
> plain kmap, that is then kept for the lifetime of the page directory.
> 
> v2: (Thomas) Rebase on dma_resv and obj->mm.lock removal.
> 
> Signed-off-by: Matthew Auld <matthew.auld@xxxxxxxxx>
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>

So I wanted to understand what px stands for as an abbreviation, and dug
all the way down to this:

commit 567047be2a7ede082d29f45524c287b87bd75e53
Author: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
Date:   Thu Jun 25 18:35:12 2015 +0300

    drm/i915/gtt: Use macros to access dma mapped pages

I still have no idea what it means, I guess px = page. But I also
committed this, so I guess can blame myself :-)

But while digging I've stumbled over this here

commit 6eebfe8a10a62139d681e2f1af1386252742278b
Author: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Date:   Fri Jul 12 08:58:18 2019 +0100

    drm/i915/gtt: Use shallow dma pages for scratch


And that's some serious wtf. Yes we've done some compile-time type
casting automagic between i915_priv and dev in the past, and I think even
that was bad taste. But it was justified with that we have these
everywhere (especially in the mmio macros), and it would be a terrible
flag day.

But I'm not seeing any need for auto-casting for these pages here, and I'm
not aware that we're doing this anywhere else in kernel code. There is
some macro-trickery in lockdep annotations, but that relies on the lockdep
map having the same struct member name in all lock types, and is not
exposed to drivers at all.

Am I missing something, or why do we have this compile-time type casting
stuff going on in i915 page accessors?
-Daniel

> ---
>  .../drm/i915/gem/selftests/i915_gem_context.c | 11 +----
>  drivers/gpu/drm/i915/gt/gen6_ppgtt.c          | 11 ++---
>  drivers/gpu/drm/i915/gt/gen8_ppgtt.c          | 26 ++++------
>  drivers/gpu/drm/i915/gt/intel_ggtt.c          |  2 +-
>  drivers/gpu/drm/i915/gt/intel_gtt.c           | 48 +++++++++----------
>  drivers/gpu/drm/i915/gt/intel_gtt.h           | 11 +++--
>  drivers/gpu/drm/i915/gt/intel_ppgtt.c         |  7 ++-
>  drivers/gpu/drm/i915/i915_vma.c               |  3 +-
>  drivers/gpu/drm/i915/selftests/i915_gem_gtt.c | 10 ++--
>  drivers/gpu/drm/i915/selftests/i915_perf.c    |  3 +-
>  10 files changed, 54 insertions(+), 78 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
> index 5fef592390cb..ce70d0a3afb2 100644
> --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
> +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
> @@ -1740,7 +1740,6 @@ static int read_from_scratch(struct i915_gem_context *ctx,
>  static int check_scratch_page(struct i915_gem_context *ctx, u32 *out)
>  {
>  	struct i915_address_space *vm;
> -	struct page *page;
>  	u32 *vaddr;
>  	int err = 0;
>  
> @@ -1748,24 +1747,18 @@ static int check_scratch_page(struct i915_gem_context *ctx, u32 *out)
>  	if (!vm)
>  		return -ENODEV;
>  
> -	page = __px_page(vm->scratch[0]);
> -	if (!page) {
> +	if (!vm->scratch[0]) {
>  		pr_err("No scratch page!\n");
>  		return -EINVAL;
>  	}
>  
> -	vaddr = kmap(page);
> -	if (!vaddr) {
> -		pr_err("No (mappable) scratch page!\n");
> -		return -EINVAL;
> -	}
> +	vaddr = __px_vaddr(vm->scratch[0]);
>  
>  	memcpy(out, vaddr, sizeof(*out));
>  	if (memchr_inv(vaddr, *out, PAGE_SIZE)) {
>  		pr_err("Inconsistent initial state of scratch page!\n");
>  		err = -EINVAL;
>  	}
> -	kunmap(page);
>  
>  	return err;
>  }
> diff --git a/drivers/gpu/drm/i915/gt/gen6_ppgtt.c b/drivers/gpu/drm/i915/gt/gen6_ppgtt.c
> index e08dff376339..21b1085769be 100644
> --- a/drivers/gpu/drm/i915/gt/gen6_ppgtt.c
> +++ b/drivers/gpu/drm/i915/gt/gen6_ppgtt.c
> @@ -96,9 +96,8 @@ static void gen6_ppgtt_clear_range(struct i915_address_space *vm,
>  		 * entries back to scratch.
>  		 */
>  
> -		vaddr = kmap_atomic_px(pt);
> +		vaddr = px_vaddr(pt);
>  		memset32(vaddr + pte, scratch_pte, count);
> -		kunmap_atomic(vaddr);
>  
>  		pte = 0;
>  	}
> @@ -120,7 +119,7 @@ static void gen6_ppgtt_insert_entries(struct i915_address_space *vm,
>  
>  	GEM_BUG_ON(!pd->entry[act_pt]);
>  
> -	vaddr = kmap_atomic_px(i915_pt_entry(pd, act_pt));
> +	vaddr = px_vaddr(i915_pt_entry(pd, act_pt));
>  	do {
>  		GEM_BUG_ON(sg_dma_len(iter.sg) < I915_GTT_PAGE_SIZE);
>  		vaddr[act_pte] = pte_encode | GEN6_PTE_ADDR_ENCODE(iter.dma);
> @@ -136,12 +135,10 @@ static void gen6_ppgtt_insert_entries(struct i915_address_space *vm,
>  		}
>  
>  		if (++act_pte == GEN6_PTES) {
> -			kunmap_atomic(vaddr);
> -			vaddr = kmap_atomic_px(i915_pt_entry(pd, ++act_pt));
> +			vaddr = px_vaddr(i915_pt_entry(pd, ++act_pt));
>  			act_pte = 0;
>  		}
>  	} while (1);
> -	kunmap_atomic(vaddr);
>  
>  	vma->page_sizes.gtt = I915_GTT_PAGE_SIZE;
>  }
> @@ -235,7 +232,7 @@ static int gen6_ppgtt_init_scratch(struct gen6_ppgtt *ppgtt)
>  		goto err_scratch0;
>  	}
>  
> -	ret = pin_pt_dma(vm, vm->scratch[1]);
> +	ret = map_pt_dma(vm, vm->scratch[1]);
>  	if (ret)
>  		goto err_scratch1;
>  
> diff --git a/drivers/gpu/drm/i915/gt/gen8_ppgtt.c b/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
> index 176c19633412..f83496836f0f 100644
> --- a/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
> +++ b/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
> @@ -242,11 +242,10 @@ static u64 __gen8_ppgtt_clear(struct i915_address_space * const vm,
>  			    atomic_read(&pt->used));
>  			GEM_BUG_ON(!count || count >= atomic_read(&pt->used));
>  
> -			vaddr = kmap_atomic_px(pt);
> +			vaddr = px_vaddr(pt);
>  			memset64(vaddr + gen8_pd_index(start, 0),
>  				 vm->scratch[0]->encode,
>  				 count);
> -			kunmap_atomic(vaddr);
>  
>  			atomic_sub(count, &pt->used);
>  			start += count;
> @@ -375,7 +374,7 @@ gen8_ppgtt_insert_pte(struct i915_ppgtt *ppgtt,
>  	gen8_pte_t *vaddr;
>  
>  	pd = i915_pd_entry(pdp, gen8_pd_index(idx, 2));
> -	vaddr = kmap_atomic_px(i915_pt_entry(pd, gen8_pd_index(idx, 1)));
> +	vaddr = px_vaddr(i915_pt_entry(pd, gen8_pd_index(idx, 1)));
>  	do {
>  		GEM_BUG_ON(sg_dma_len(iter->sg) < I915_GTT_PAGE_SIZE);
>  		vaddr[gen8_pd_index(idx, 0)] = pte_encode | iter->dma;
> @@ -402,12 +401,10 @@ gen8_ppgtt_insert_pte(struct i915_ppgtt *ppgtt,
>  			}
>  
>  			clflush_cache_range(vaddr, PAGE_SIZE);
> -			kunmap_atomic(vaddr);
> -			vaddr = kmap_atomic_px(i915_pt_entry(pd, gen8_pd_index(idx, 1)));
> +			vaddr = px_vaddr(i915_pt_entry(pd, gen8_pd_index(idx, 1)));
>  		}
>  	} while (1);
>  	clflush_cache_range(vaddr, PAGE_SIZE);
> -	kunmap_atomic(vaddr);
>  
>  	return idx;
>  }
> @@ -442,7 +439,7 @@ static void gen8_ppgtt_insert_huge(struct i915_vma *vma,
>  			encode |= GEN8_PDE_PS_2M;
>  			page_size = I915_GTT_PAGE_SIZE_2M;
>  
> -			vaddr = kmap_atomic_px(pd);
> +			vaddr = px_vaddr(pd);
>  		} else {
>  			struct i915_page_table *pt =
>  				i915_pt_entry(pd, __gen8_pte_index(start, 1));
> @@ -457,7 +454,7 @@ static void gen8_ppgtt_insert_huge(struct i915_vma *vma,
>  			     rem >= (I915_PDES - index) * I915_GTT_PAGE_SIZE))
>  				maybe_64K = __gen8_pte_index(start, 1);
>  
> -			vaddr = kmap_atomic_px(pt);
> +			vaddr = px_vaddr(pt);
>  		}
>  
>  		do {
> @@ -491,7 +488,6 @@ static void gen8_ppgtt_insert_huge(struct i915_vma *vma,
>  		} while (rem >= page_size && index < I915_PDES);
>  
>  		clflush_cache_range(vaddr, PAGE_SIZE);
> -		kunmap_atomic(vaddr);
>  
>  		/*
>  		 * Is it safe to mark the 2M block as 64K? -- Either we have
> @@ -505,9 +501,8 @@ static void gen8_ppgtt_insert_huge(struct i915_vma *vma,
>  		      !iter->sg && IS_ALIGNED(vma->node.start +
>  					      vma->node.size,
>  					      I915_GTT_PAGE_SIZE_2M)))) {
> -			vaddr = kmap_atomic_px(pd);
> +			vaddr = px_vaddr(pd);
>  			vaddr[maybe_64K] |= GEN8_PDE_IPS_64K;
> -			kunmap_atomic(vaddr);
>  			page_size = I915_GTT_PAGE_SIZE_64K;
>  
>  			/*
> @@ -523,12 +518,11 @@ static void gen8_ppgtt_insert_huge(struct i915_vma *vma,
>  				u16 i;
>  
>  				encode = vma->vm->scratch[0]->encode;
> -				vaddr = kmap_atomic_px(i915_pt_entry(pd, maybe_64K));
> +				vaddr = px_vaddr(i915_pt_entry(pd, maybe_64K));
>  
>  				for (i = 1; i < index; i += 16)
>  					memset64(vaddr + i, encode, 15);
>  
> -				kunmap_atomic(vaddr);
>  			}
>  		}
>  
> @@ -602,7 +596,7 @@ static int gen8_init_scratch(struct i915_address_space *vm)
>  		if (IS_ERR(obj))
>  			goto free_scratch;
>  
> -		ret = pin_pt_dma(vm, obj);
> +		ret = map_pt_dma(vm, obj);
>  		if (ret) {
>  			i915_gem_object_put(obj);
>  			goto free_scratch;
> @@ -639,7 +633,7 @@ static int gen8_preallocate_top_level_pdp(struct i915_ppgtt *ppgtt)
>  		if (IS_ERR(pde))
>  			return PTR_ERR(pde);
>  
> -		err = pin_pt_dma(vm, pde->pt.base);
> +		err = map_pt_dma(vm, pde->pt.base);
>  		if (err) {
>  			i915_gem_object_put(pde->pt.base);
>  			free_pd(vm, pde);
> @@ -675,7 +669,7 @@ gen8_alloc_top_pd(struct i915_address_space *vm)
>  		goto err_pd;
>  	}
>  
> -	err = pin_pt_dma(vm, pd->pt.base);
> +	err = map_pt_dma(vm, pd->pt.base);
>  	if (err)
>  		goto err_pd;
>  
> diff --git a/drivers/gpu/drm/i915/gt/intel_ggtt.c b/drivers/gpu/drm/i915/gt/intel_ggtt.c
> index 670c1271e7d5..d94628b9d89e 100644
> --- a/drivers/gpu/drm/i915/gt/intel_ggtt.c
> +++ b/drivers/gpu/drm/i915/gt/intel_ggtt.c
> @@ -657,7 +657,7 @@ static int init_aliasing_ppgtt(struct i915_ggtt *ggtt)
>  		goto err_ppgtt;
>  
>  	i915_gem_object_lock(ppgtt->vm.scratch[0], NULL);
> -	err = i915_vm_pin_pt_stash(&ppgtt->vm, &stash);
> +	err = i915_vm_map_pt_stash(&ppgtt->vm, &stash);
>  	i915_gem_object_unlock(ppgtt->vm.scratch[0]);
>  	if (err)
>  		goto err_stash;
> diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.c b/drivers/gpu/drm/i915/gt/intel_gtt.c
> index 941f8af016d6..d386b89e2758 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gtt.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gtt.c
> @@ -25,27 +25,25 @@ struct drm_i915_gem_object *alloc_pt_dma(struct i915_address_space *vm, int sz)
>  	return obj;
>  }
>  
> -int pin_pt_dma(struct i915_address_space *vm, struct drm_i915_gem_object *obj)
> +int map_pt_dma(struct i915_address_space *vm, struct drm_i915_gem_object *obj)
>  {
> -	int err;
> +	void *vaddr;
>  
> -	i915_gem_object_lock(obj, NULL);
> -	err = i915_gem_object_pin_pages(obj);
> -	i915_gem_object_unlock(obj);
> -	if (err)
> -		return err;
> +	vaddr = i915_gem_object_pin_map_unlocked(obj, I915_MAP_WB);
> +	if (IS_ERR(vaddr))
> +		return PTR_ERR(vaddr);
>  
>  	i915_gem_object_make_unshrinkable(obj);
>  	return 0;
>  }
>  
> -int pin_pt_dma_locked(struct i915_address_space *vm, struct drm_i915_gem_object *obj)
> +int map_pt_dma_locked(struct i915_address_space *vm, struct drm_i915_gem_object *obj)
>  {
> -	int err;
> +	void *vaddr;
>  
> -	err = i915_gem_object_pin_pages(obj);
> -	if (err)
> -		return err;
> +	vaddr = i915_gem_object_pin_map(obj, I915_MAP_WB);
> +	if (IS_ERR(vaddr))
> +		return PTR_ERR(vaddr);
>  
>  	i915_gem_object_make_unshrinkable(obj);
>  	return 0;
> @@ -155,6 +153,14 @@ void clear_pages(struct i915_vma *vma)
>  	memset(&vma->page_sizes, 0, sizeof(vma->page_sizes));
>  }
>  
> +void *__px_vaddr(struct drm_i915_gem_object *p)
> +{
> +	enum i915_map_type type;
> +
> +	GEM_BUG_ON(!i915_gem_object_has_pages(p));
> +	return page_unpack_bits(p->mm.mapping, &type);
> +}
> +
>  dma_addr_t __px_dma(struct drm_i915_gem_object *p)
>  {
>  	GEM_BUG_ON(!i915_gem_object_has_pages(p));
> @@ -170,32 +176,22 @@ struct page *__px_page(struct drm_i915_gem_object *p)
>  void
>  fill_page_dma(struct drm_i915_gem_object *p, const u64 val, unsigned int count)
>  {
> -	struct page *page = __px_page(p);
> -	void *vaddr;
> +	void *vaddr = __px_vaddr(p);
>  
> -	vaddr = kmap(page);
>  	memset64(vaddr, val, count);
>  	clflush_cache_range(vaddr, PAGE_SIZE);
> -	kunmap(page);
>  }
>  
>  static void poison_scratch_page(struct drm_i915_gem_object *scratch)
>  {
> -	struct sgt_iter sgt;
> -	struct page *page;
> +	void *vaddr = __px_vaddr(scratch);
>  	u8 val;
>  
>  	val = 0;
>  	if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM))
>  		val = POISON_FREE;
>  
> -	for_each_sgt_page(page, sgt, scratch->mm.pages) {
> -		void *vaddr;
> -
> -		vaddr = kmap(page);
> -		memset(vaddr, val, PAGE_SIZE);
> -		kunmap(page);
> -	}
> +	memset(vaddr, val, scratch->base.size);
>  }
>  
>  int setup_scratch_page(struct i915_address_space *vm)
> @@ -225,7 +221,7 @@ int setup_scratch_page(struct i915_address_space *vm)
>  		if (IS_ERR(obj))
>  			goto skip;
>  
> -		if (pin_pt_dma(vm, obj))
> +		if (map_pt_dma(vm, obj))
>  			goto skip_obj;
>  
>  		/* We need a single contiguous page for our scratch */
> diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.h b/drivers/gpu/drm/i915/gt/intel_gtt.h
> index e67e34e17913..40e486704558 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gtt.h
> +++ b/drivers/gpu/drm/i915/gt/intel_gtt.h
> @@ -180,6 +180,9 @@ struct page *__px_page(struct drm_i915_gem_object *p);
>  dma_addr_t __px_dma(struct drm_i915_gem_object *p);
>  #define px_dma(px) (__px_dma(px_base(px)))
>  
> +void *__px_vaddr(struct drm_i915_gem_object *p);
> +#define px_vaddr(px) (__px_vaddr(px_base(px)))
> +
>  #define px_pt(px) \
>  	__px_choose_expr(px, struct i915_page_table *, __x, \
>  	__px_choose_expr(px, struct i915_page_directory *, &__x->pt, \
> @@ -511,8 +514,6 @@ struct i915_ppgtt *i915_ppgtt_create(struct intel_gt *gt);
>  void i915_ggtt_suspend(struct i915_ggtt *gtt);
>  void i915_ggtt_resume(struct i915_ggtt *ggtt);
>  
> -#define kmap_atomic_px(px) kmap_atomic(__px_page(px_base(px)))
> -
>  void
>  fill_page_dma(struct drm_i915_gem_object *p, const u64 val, unsigned int count);
>  
> @@ -530,8 +531,8 @@ struct i915_page_table *alloc_pt(struct i915_address_space *vm);
>  struct i915_page_directory *alloc_pd(struct i915_address_space *vm);
>  struct i915_page_directory *__alloc_pd(int npde);
>  
> -int pin_pt_dma(struct i915_address_space *vm, struct drm_i915_gem_object *obj);
> -int pin_pt_dma_locked(struct i915_address_space *vm, struct drm_i915_gem_object *obj);
> +int map_pt_dma(struct i915_address_space *vm, struct drm_i915_gem_object *obj);
> +int map_pt_dma_locked(struct i915_address_space *vm, struct drm_i915_gem_object *obj);
>  
>  void free_px(struct i915_address_space *vm,
>  	     struct i915_page_table *pt, int lvl);
> @@ -578,7 +579,7 @@ void setup_private_pat(struct intel_uncore *uncore);
>  int i915_vm_alloc_pt_stash(struct i915_address_space *vm,
>  			   struct i915_vm_pt_stash *stash,
>  			   u64 size);
> -int i915_vm_pin_pt_stash(struct i915_address_space *vm,
> +int i915_vm_map_pt_stash(struct i915_address_space *vm,
>  			 struct i915_vm_pt_stash *stash);
>  void i915_vm_free_pt_stash(struct i915_address_space *vm,
>  			   struct i915_vm_pt_stash *stash);
> diff --git a/drivers/gpu/drm/i915/gt/intel_ppgtt.c b/drivers/gpu/drm/i915/gt/intel_ppgtt.c
> index 014ae8ac4480..4e3d80c2295c 100644
> --- a/drivers/gpu/drm/i915/gt/intel_ppgtt.c
> +++ b/drivers/gpu/drm/i915/gt/intel_ppgtt.c
> @@ -87,11 +87,10 @@ write_dma_entry(struct drm_i915_gem_object * const pdma,
>  		const unsigned short idx,
>  		const u64 encoded_entry)
>  {
> -	u64 * const vaddr = kmap_atomic(__px_page(pdma));
> +	u64 * const vaddr = __px_vaddr(pdma);
>  
>  	vaddr[idx] = encoded_entry;
>  	clflush_cache_range(&vaddr[idx], sizeof(u64));
> -	kunmap_atomic(vaddr);
>  }
>  
>  void
> @@ -258,7 +257,7 @@ int i915_vm_alloc_pt_stash(struct i915_address_space *vm,
>  	return 0;
>  }
>  
> -int i915_vm_pin_pt_stash(struct i915_address_space *vm,
> +int i915_vm_map_pt_stash(struct i915_address_space *vm,
>  			 struct i915_vm_pt_stash *stash)
>  {
>  	struct i915_page_table *pt;
> @@ -266,7 +265,7 @@ int i915_vm_pin_pt_stash(struct i915_address_space *vm,
>  
>  	for (n = 0; n < ARRAY_SIZE(stash->pt); n++) {
>  		for (pt = stash->pt[n]; pt; pt = pt->stash) {
> -			err = pin_pt_dma_locked(vm, pt->base);
> +			err = map_pt_dma_locked(vm, pt->base);
>  			if (err)
>  				return err;
>  		}
> diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
> index e24d33aecac4..c68a743fac2a 100644
> --- a/drivers/gpu/drm/i915/i915_vma.c
> +++ b/drivers/gpu/drm/i915/i915_vma.c
> @@ -912,8 +912,7 @@ int i915_vma_pin_ww(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,
>  			if (err)
>  				goto err_fence;
>  
> -			err = i915_vm_pin_pt_stash(vma->vm,
> -						   &work->stash);
> +			err = i915_vm_map_pt_stash(vma->vm, &work->stash);
>  			if (err)
>  				goto err_fence;
>  		}
> diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
> index 2e4f06eaacc1..e060e455e9f6 100644
> --- a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
> +++ b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
> @@ -186,7 +186,7 @@ static int igt_ppgtt_alloc(void *arg)
>  		if (err)
>  			goto err_ppgtt_cleanup;
>  
> -		err = i915_vm_pin_pt_stash(&ppgtt->vm, &stash);
> +		err = i915_vm_map_pt_stash(&ppgtt->vm, &stash);
>  		if (err) {
>  			i915_vm_free_pt_stash(&ppgtt->vm, &stash);
>  			goto err_ppgtt_cleanup;
> @@ -208,7 +208,7 @@ static int igt_ppgtt_alloc(void *arg)
>  		if (err)
>  			goto err_ppgtt_cleanup;
>  
> -		err = i915_vm_pin_pt_stash(&ppgtt->vm, &stash);
> +		err = i915_vm_map_pt_stash(&ppgtt->vm, &stash);
>  		if (err) {
>  			i915_vm_free_pt_stash(&ppgtt->vm, &stash);
>  			goto err_ppgtt_cleanup;
> @@ -325,11 +325,10 @@ static int lowlevel_hole(struct i915_address_space *vm,
>  							   BIT_ULL(size)))
>  					goto alloc_vm_end;
>  
> -				err = i915_vm_pin_pt_stash(vm, &stash);
> +				err = i915_vm_map_pt_stash(vm, &stash);
>  				if (!err)
>  					vm->allocate_va_range(vm, &stash,
>  							      addr, BIT_ULL(size));
> -
>  				i915_vm_free_pt_stash(vm, &stash);
>  alloc_vm_end:
>  				if (err == -EDEADLK) {
> @@ -1967,10 +1966,9 @@ static int igt_cs_tlb(void *arg)
>  			if (err)
>  				goto end_ww;
>  
> -			err = i915_vm_pin_pt_stash(vm, &stash);
> +			err = i915_vm_map_pt_stash(vm, &stash);
>  			if (!err)
>  				vm->allocate_va_range(vm, &stash, offset, chunk_size);
> -
>  			i915_vm_free_pt_stash(vm, &stash);
>  end_ww:
>  			if (err == -EDEADLK) {
> diff --git a/drivers/gpu/drm/i915/selftests/i915_perf.c b/drivers/gpu/drm/i915/selftests/i915_perf.c
> index e9d86dab8677..bfb0290967a1 100644
> --- a/drivers/gpu/drm/i915/selftests/i915_perf.c
> +++ b/drivers/gpu/drm/i915/selftests/i915_perf.c
> @@ -307,7 +307,7 @@ static int live_noa_gpr(void *arg)
>  	}
>  
>  	/* Poison the ce->vm so we detect writes not to the GGTT gt->scratch */
> -	scratch = kmap(__px_page(ce->vm->scratch[0]));
> +	scratch = __px_vaddr(ce->vm->scratch[0]);
>  	memset(scratch, POISON_FREE, PAGE_SIZE);
>  
>  	rq = intel_context_create_request(ce);
> @@ -405,7 +405,6 @@ static int live_noa_gpr(void *arg)
>  out_rq:
>  	i915_request_put(rq);
>  out_ce:
> -	kunmap(__px_page(ce->vm->scratch[0]));
>  	intel_context_put(ce);
>  out:
>  	stream_destroy(stream);
> -- 
> 2.26.3
> 
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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