Re: [Intel-gfx] [PATCH 3/7] drm/i915/gtt: map the PD up front

[Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>]

On 26/04/2021 17:18, Matthew Auld wrote:
> On 26/04/2021 16:20, Tvrtko Ursulin wrote:
>>
>> On 26/04/2021 11:18, Matthew Auld wrote:
>>> We need to general our accessor for the page directories and tables from
>>
>> Generalise?
>>
>>> 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.
>>
>> How big are the address spaces used for mapping types? On 32-bit?
>>
>> Do we have a mechanism to free something up if there is address space 
>> pressure in there and is that a concern if we do not?
> 
> It's a concern yes, since while the vma is pinned the mapping remains 
> there for the PDs underneath, or at least until the used_count reaches 
> zero, at which point we can safely destroy the mapping.
> 
> For the 32bit concern, this was brought up in some earlier review[1] 
> also. AFAIK the conclusion was just to not care about 32b for modern 
> platforms, so platforms with full ppGTT support where this patch 
> actually matters the most.
> 
> [1] https://patchwork.freedesktop.org/patch/404460/?series=84344&rev=1

Okay thanks.

Can I suggest to capture at least the gist of this discussion in the 
commit message?

Regards,

Tvrtko

>>
>> Regards,
>>
>> Tvrtko
>>
>>> v2: (Thomas) Rebase on dma_resv and obj->mm.lock removal.
>>>
>>> Signed-off-by: Matthew Auld <matthew.auld@intel.com>
>>> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
>>> Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
>>> ---
>>>   .../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 07490db51cdc..eb01899ac6b7 100644
>>> --- a/drivers/gpu/drm/i915/i915_vma.c
>>> +++ b/drivers/gpu/drm/i915/i915_vma.c
>>> @@ -905,8 +905,7 @@ 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);
>>>
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