diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_gtt.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_gtt.c | 1448 |
1 files changed, 754 insertions, 694 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 7e403eaa9e0f..f00c7fbef79e 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -42,7 +42,7 @@ #include "intel_drv.h" #include "intel_frontbuffer.h" -#define I915_GFP_DMA (GFP_KERNEL | __GFP_HIGHMEM) +#define I915_GFP_ALLOW_FAIL (GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_NOWARN) /** * DOC: Global GTT views @@ -110,7 +110,8 @@ i915_get_ggtt_vma_pages(struct i915_vma *vma); static void gen6_ggtt_invalidate(struct drm_i915_private *dev_priv) { - /* Note that as an uncached mmio write, this should flush the + /* + * Note that as an uncached mmio write, this will flush the * WCB of the writes into the GGTT before it triggers the invalidate. */ I915_WRITE(GFX_FLSH_CNTL_GEN6, GFX_FLSH_CNTL_EN); @@ -194,18 +195,18 @@ static int ppgtt_bind_vma(struct i915_vma *vma, u32 unused) { u32 pte_flags; - int ret; + int err; if (!(vma->flags & I915_VMA_LOCAL_BIND)) { - ret = vma->vm->allocate_va_range(vma->vm, vma->node.start, - vma->size); - if (ret) - return ret; + err = vma->vm->allocate_va_range(vma->vm, + vma->node.start, vma->size); + if (err) + return err; } - /* Currently applicable only to VLV */ + /* Applicable to VLV, and gen8+ */ pte_flags = 0; - if (vma->obj->gt_ro) + if (i915_gem_object_is_readonly(vma->obj)) pte_flags |= PTE_READ_ONLY; vma->vm->insert_entries(vma->vm, vma, cache_level, pte_flags); @@ -243,10 +244,13 @@ static void clear_pages(struct i915_vma *vma) } static gen8_pte_t gen8_pte_encode(dma_addr_t addr, - enum i915_cache_level level) + enum i915_cache_level level, + u32 flags) { - gen8_pte_t pte = _PAGE_PRESENT | _PAGE_RW; - pte |= addr; + gen8_pte_t pte = addr | _PAGE_PRESENT | _PAGE_RW; + + if (unlikely(flags & PTE_READ_ONLY)) + pte &= ~_PAGE_RW; switch (level) { case I915_CACHE_NONE: @@ -374,37 +378,70 @@ static gen6_pte_t iris_pte_encode(dma_addr_t addr, return pte; } +static void stash_init(struct pagestash *stash) +{ + pagevec_init(&stash->pvec); + spin_lock_init(&stash->lock); +} + +static struct page *stash_pop_page(struct pagestash *stash) +{ + struct page *page = NULL; + + spin_lock(&stash->lock); + if (likely(stash->pvec.nr)) + page = stash->pvec.pages[--stash->pvec.nr]; + spin_unlock(&stash->lock); + + return page; +} + +static void stash_push_pagevec(struct pagestash *stash, struct pagevec *pvec) +{ + int nr; + + spin_lock_nested(&stash->lock, SINGLE_DEPTH_NESTING); + + nr = min_t(int, pvec->nr, pagevec_space(&stash->pvec)); + memcpy(stash->pvec.pages + stash->pvec.nr, + pvec->pages + pvec->nr - nr, + sizeof(pvec->pages[0]) * nr); + stash->pvec.nr += nr; + + spin_unlock(&stash->lock); + + pvec->nr -= nr; +} + static struct page *vm_alloc_page(struct i915_address_space *vm, gfp_t gfp) { - struct pagevec *pvec = &vm->free_pages; - struct pagevec stash; + struct pagevec stack; + struct page *page; if (I915_SELFTEST_ONLY(should_fail(&vm->fault_attr, 1))) i915_gem_shrink_all(vm->i915); - if (likely(pvec->nr)) - return pvec->pages[--pvec->nr]; + page = stash_pop_page(&vm->free_pages); + if (page) + return page; if (!vm->pt_kmap_wc) return alloc_page(gfp); - /* A placeholder for a specific mutex to guard the WC stash */ - lockdep_assert_held(&vm->i915->drm.struct_mutex); - /* Look in our global stash of WC pages... */ - pvec = &vm->i915->mm.wc_stash; - if (likely(pvec->nr)) - return pvec->pages[--pvec->nr]; + page = stash_pop_page(&vm->i915->mm.wc_stash); + if (page) + return page; /* - * Otherwise batch allocate pages to amoritize cost of set_pages_wc. + * Otherwise batch allocate pages to amortize cost of set_pages_wc. * * We have to be careful as page allocation may trigger the shrinker * (via direct reclaim) which will fill up the WC stash underneath us. * So we add our WB pages into a temporary pvec on the stack and merge * them into the WC stash after all the allocations are complete. */ - pagevec_init(&stash); + pagevec_init(&stack); do { struct page *page; @@ -412,59 +449,67 @@ static struct page *vm_alloc_page(struct i915_address_space *vm, gfp_t gfp) if (unlikely(!page)) break; - stash.pages[stash.nr++] = page; - } while (stash.nr < pagevec_space(pvec)); + stack.pages[stack.nr++] = page; + } while (pagevec_space(&stack)); - if (stash.nr) { - int nr = min_t(int, stash.nr, pagevec_space(pvec)); - struct page **pages = stash.pages + stash.nr - nr; + if (stack.nr && !set_pages_array_wc(stack.pages, stack.nr)) { + page = stack.pages[--stack.nr]; - if (nr && !set_pages_array_wc(pages, nr)) { - memcpy(pvec->pages + pvec->nr, - pages, sizeof(pages[0]) * nr); - pvec->nr += nr; - stash.nr -= nr; - } + /* Merge spare WC pages to the global stash */ + stash_push_pagevec(&vm->i915->mm.wc_stash, &stack); + + /* Push any surplus WC pages onto the local VM stash */ + if (stack.nr) + stash_push_pagevec(&vm->free_pages, &stack); + } - pagevec_release(&stash); + /* Return unwanted leftovers */ + if (unlikely(stack.nr)) { + WARN_ON_ONCE(set_pages_array_wb(stack.pages, stack.nr)); + __pagevec_release(&stack); } - return likely(pvec->nr) ? pvec->pages[--pvec->nr] : NULL; + return page; } static void vm_free_pages_release(struct i915_address_space *vm, bool immediate) { - struct pagevec *pvec = &vm->free_pages; + struct pagevec *pvec = &vm->free_pages.pvec; + struct pagevec stack; + lockdep_assert_held(&vm->free_pages.lock); GEM_BUG_ON(!pagevec_count(pvec)); if (vm->pt_kmap_wc) { - struct pagevec *stash = &vm->i915->mm.wc_stash; - - /* When we use WC, first fill up the global stash and then + /* + * When we use WC, first fill up the global stash and then * only if full immediately free the overflow. */ + stash_push_pagevec(&vm->i915->mm.wc_stash, pvec); - lockdep_assert_held(&vm->i915->drm.struct_mutex); - if (pagevec_space(stash)) { - do { - stash->pages[stash->nr++] = - pvec->pages[--pvec->nr]; - if (!pvec->nr) - return; - } while (pagevec_space(stash)); - - /* As we have made some room in the VM's free_pages, - * we can wait for it to fill again. Unless we are - * inside i915_address_space_fini() and must - * immediately release the pages! - */ - if (!immediate) - return; - } + /* + * As we have made some room in the VM's free_pages, + * we can wait for it to fill again. Unless we are + * inside i915_address_space_fini() and must + * immediately release the pages! + */ + if (pvec->nr <= (immediate ? 0 : PAGEVEC_SIZE - 1)) + return; + /* + * We have to drop the lock to allow ourselves to sleep, + * so take a copy of the pvec and clear the stash for + * others to use it as we sleep. + */ + stack = *pvec; + pagevec_reinit(pvec); + spin_unlock(&vm->free_pages.lock); + + pvec = &stack; set_pages_array_wb(pvec->pages, pvec->nr); + + spin_lock(&vm->free_pages.lock); } __pagevec_release(pvec); @@ -480,20 +525,60 @@ static void vm_free_page(struct i915_address_space *vm, struct page *page) * unconditional might_sleep() for everybody. */ might_sleep(); - if (!pagevec_add(&vm->free_pages, page)) + spin_lock(&vm->free_pages.lock); + if (!pagevec_add(&vm->free_pages.pvec, page)) vm_free_pages_release(vm, false); + spin_unlock(&vm->free_pages.lock); +} + +static void i915_address_space_init(struct i915_address_space *vm, + struct drm_i915_private *dev_priv) +{ + /* + * The vm->mutex must be reclaim safe (for use in the shrinker). + * Do a dummy acquire now under fs_reclaim so that any allocation + * attempt holding the lock is immediately reported by lockdep. + */ + mutex_init(&vm->mutex); + i915_gem_shrinker_taints_mutex(&vm->mutex); + + GEM_BUG_ON(!vm->total); + drm_mm_init(&vm->mm, 0, vm->total); + vm->mm.head_node.color = I915_COLOR_UNEVICTABLE; + + stash_init(&vm->free_pages); + + INIT_LIST_HEAD(&vm->active_list); + INIT_LIST_HEAD(&vm->inactive_list); + INIT_LIST_HEAD(&vm->unbound_list); +} + +static void i915_address_space_fini(struct i915_address_space *vm) +{ + spin_lock(&vm->free_pages.lock); + if (pagevec_count(&vm->free_pages.pvec)) + vm_free_pages_release(vm, true); + GEM_BUG_ON(pagevec_count(&vm->free_pages.pvec)); + spin_unlock(&vm->free_pages.lock); + + drm_mm_takedown(&vm->mm); + + mutex_destroy(&vm->mutex); } static int __setup_page_dma(struct i915_address_space *vm, struct i915_page_dma *p, gfp_t gfp) { - p->page = vm_alloc_page(vm, gfp | __GFP_NOWARN | __GFP_NORETRY); + p->page = vm_alloc_page(vm, gfp | I915_GFP_ALLOW_FAIL); if (unlikely(!p->page)) return -ENOMEM; - p->daddr = dma_map_page(vm->dma, p->page, 0, PAGE_SIZE, - PCI_DMA_BIDIRECTIONAL); + p->daddr = dma_map_page_attrs(vm->dma, + p->page, 0, PAGE_SIZE, + PCI_DMA_BIDIRECTIONAL, + DMA_ATTR_SKIP_CPU_SYNC | + DMA_ATTR_NO_WARN); if (unlikely(dma_mapping_error(vm->dma, p->daddr))) { vm_free_page(vm, p->page); return -ENOMEM; @@ -505,7 +590,7 @@ static int __setup_page_dma(struct i915_address_space *vm, static int setup_page_dma(struct i915_address_space *vm, struct i915_page_dma *p) { - return __setup_page_dma(vm, p, I915_GFP_DMA); + return __setup_page_dma(vm, p, __GFP_HIGHMEM); } static void cleanup_page_dma(struct i915_address_space *vm, @@ -519,8 +604,8 @@ static void cleanup_page_dma(struct i915_address_space *vm, #define setup_px(vm, px) setup_page_dma((vm), px_base(px)) #define cleanup_px(vm, px) cleanup_page_dma((vm), px_base(px)) -#define fill_px(ppgtt, px, v) fill_page_dma((vm), px_base(px), (v)) -#define fill32_px(ppgtt, px, v) fill_page_dma_32((vm), px_base(px), (v)) +#define fill_px(vm, px, v) fill_page_dma((vm), px_base(px), (v)) +#define fill32_px(vm, px, v) fill_page_dma_32((vm), px_base(px), (v)) static void fill_page_dma(struct i915_address_space *vm, struct i915_page_dma *p, @@ -543,9 +628,7 @@ static void fill_page_dma_32(struct i915_address_space *vm, static int setup_scratch_page(struct i915_address_space *vm, gfp_t gfp) { - struct page *page = NULL; - dma_addr_t addr; - int order; + unsigned long size; /* * In order to utilize 64K pages for an object with a size < 2M, we will @@ -559,48 +642,50 @@ setup_scratch_page(struct i915_address_space *vm, gfp_t gfp) * TODO: we should really consider write-protecting the scratch-page and * sharing between ppgtt */ + size = I915_GTT_PAGE_SIZE_4K; if (i915_vm_is_48bit(vm) && HAS_PAGE_SIZES(vm->i915, I915_GTT_PAGE_SIZE_64K)) { - order = get_order(I915_GTT_PAGE_SIZE_64K); - page = alloc_pages(gfp | __GFP_ZERO | __GFP_NOWARN, order); - if (page) { - addr = dma_map_page(vm->dma, page, 0, - I915_GTT_PAGE_SIZE_64K, - PCI_DMA_BIDIRECTIONAL); - if (unlikely(dma_mapping_error(vm->dma, addr))) { - __free_pages(page, order); - page = NULL; - } - - if (!IS_ALIGNED(addr, I915_GTT_PAGE_SIZE_64K)) { - dma_unmap_page(vm->dma, addr, - I915_GTT_PAGE_SIZE_64K, - PCI_DMA_BIDIRECTIONAL); - __free_pages(page, order); - page = NULL; - } - } + size = I915_GTT_PAGE_SIZE_64K; + gfp |= __GFP_NOWARN; } + gfp |= __GFP_ZERO | __GFP_RETRY_MAYFAIL; + + do { + int order = get_order(size); + struct page *page; + dma_addr_t addr; - if (!page) { - order = 0; - page = alloc_page(gfp | __GFP_ZERO); + page = alloc_pages(gfp, order); if (unlikely(!page)) - return -ENOMEM; + goto skip; + + addr = dma_map_page_attrs(vm->dma, + page, 0, size, + PCI_DMA_BIDIRECTIONAL, + DMA_ATTR_SKIP_CPU_SYNC | + DMA_ATTR_NO_WARN); + if (unlikely(dma_mapping_error(vm->dma, addr))) + goto free_page; + + if (unlikely(!IS_ALIGNED(addr, size))) + goto unmap_page; + + vm->scratch_page.page = page; + vm->scratch_page.daddr = addr; + vm->scratch_page.order = order; + return 0; - addr = dma_map_page(vm->dma, page, 0, PAGE_SIZE, - PCI_DMA_BIDIRECTIONAL); - if (unlikely(dma_mapping_error(vm->dma, addr))) { - __free_page(page); +unmap_page: + dma_unmap_page(vm->dma, addr, size, PCI_DMA_BIDIRECTIONAL); +free_page: + __free_pages(page, order); +skip: + if (size == I915_GTT_PAGE_SIZE_4K) return -ENOMEM; - } - } - - vm->scratch_page.page = page; - vm->scratch_page.daddr = addr; - vm->scratch_page.order = order; - return 0; + size = I915_GTT_PAGE_SIZE_4K; + gfp &= ~__GFP_NOWARN; + } while (1); } static void cleanup_scratch_page(struct i915_address_space *vm) @@ -616,7 +701,7 @@ static struct i915_page_table *alloc_pt(struct i915_address_space *vm) { struct i915_page_table *pt; - pt = kmalloc(sizeof(*pt), GFP_KERNEL | __GFP_NOWARN); + pt = kmalloc(sizeof(*pt), I915_GFP_ALLOW_FAIL); if (unlikely(!pt)) return ERR_PTR(-ENOMEM); @@ -639,21 +724,20 @@ static void gen8_initialize_pt(struct i915_address_space *vm, struct i915_page_table *pt) { fill_px(vm, pt, - gen8_pte_encode(vm->scratch_page.daddr, I915_CACHE_LLC)); + gen8_pte_encode(vm->scratch_page.daddr, I915_CACHE_LLC, 0)); } -static void gen6_initialize_pt(struct i915_address_space *vm, +static void gen6_initialize_pt(struct gen6_hw_ppgtt *ppgtt, struct i915_page_table *pt) { - fill32_px(vm, pt, - vm->pte_encode(vm->scratch_page.daddr, I915_CACHE_LLC, 0)); + fill32_px(&ppgtt->base.vm, pt, ppgtt->scratch_pte); } static struct i915_page_directory *alloc_pd(struct i915_address_space *vm) { struct i915_page_directory *pd; - pd = kzalloc(sizeof(*pd), GFP_KERNEL | __GFP_NOWARN); + pd = kzalloc(sizeof(*pd), I915_GFP_ALLOW_FAIL); if (unlikely(!pd)) return ERR_PTR(-ENOMEM); @@ -676,27 +760,22 @@ static void free_pd(struct i915_address_space *vm, static void gen8_initialize_pd(struct i915_address_space *vm, struct i915_page_directory *pd) { - unsigned int i; - fill_px(vm, pd, gen8_pde_encode(px_dma(vm->scratch_pt), I915_CACHE_LLC)); - for (i = 0; i < I915_PDES; i++) - pd->page_table[i] = vm->scratch_pt; + memset_p((void **)pd->page_table, vm->scratch_pt, I915_PDES); } static int __pdp_init(struct i915_address_space *vm, struct i915_page_directory_pointer *pdp) { const unsigned int pdpes = i915_pdpes_per_pdp(vm); - unsigned int i; pdp->page_directory = kmalloc_array(pdpes, sizeof(*pdp->page_directory), - GFP_KERNEL | __GFP_NOWARN); + I915_GFP_ALLOW_FAIL); if (unlikely(!pdp->page_directory)) return -ENOMEM; - for (i = 0; i < pdpes; i++) - pdp->page_directory[i] = vm->scratch_pd; + memset_p((void **)pdp->page_directory, vm->scratch_pd, pdpes); return 0; } @@ -718,7 +797,7 @@ alloc_pdp(struct i915_address_space *vm) struct i915_page_directory_pointer *pdp; int ret = -ENOMEM; - WARN_ON(!use_4lvl(vm)); + GEM_BUG_ON(!use_4lvl(vm)); pdp = kzalloc(sizeof(*pdp), GFP_KERNEL); if (!pdp) @@ -767,59 +846,9 @@ static void gen8_initialize_pdp(struct i915_address_space *vm, static void gen8_initialize_pml4(struct i915_address_space *vm, struct i915_pml4 *pml4) { - unsigned int i; - fill_px(vm, pml4, gen8_pml4e_encode(px_dma(vm->scratch_pdp), I915_CACHE_LLC)); - for (i = 0; i < GEN8_PML4ES_PER_PML4; i++) - pml4->pdps[i] = vm->scratch_pdp; -} - -/* Broadwell Page Directory Pointer Descriptors */ -static int gen8_write_pdp(struct drm_i915_gem_request *req, - unsigned entry, - dma_addr_t addr) -{ - struct intel_engine_cs *engine = req->engine; - u32 *cs; - - BUG_ON(entry >= 4); - - cs = intel_ring_begin(req, 6); - if (IS_ERR(cs)) - return PTR_ERR(cs); - - *cs++ = MI_LOAD_REGISTER_IMM(1); - *cs++ = i915_mmio_reg_offset(GEN8_RING_PDP_UDW(engine, entry)); - *cs++ = upper_32_bits(addr); - *cs++ = MI_LOAD_REGISTER_IMM(1); - *cs++ = i915_mmio_reg_offset(GEN8_RING_PDP_LDW(engine, entry)); - *cs++ = lower_32_bits(addr); - intel_ring_advance(req, cs); - - return 0; -} - -static int gen8_mm_switch_3lvl(struct i915_hw_ppgtt *ppgtt, - struct drm_i915_gem_request *req) -{ - int i, ret; - - for (i = GEN8_3LVL_PDPES - 1; i >= 0; i--) { - const dma_addr_t pd_daddr = i915_page_dir_dma_addr(ppgtt, i); - - ret = gen8_write_pdp(req, i, pd_daddr); - if (ret) - return ret; - } - - return 0; -} - -static int gen8_mm_switch_4lvl(struct i915_hw_ppgtt *ppgtt, - struct drm_i915_gem_request *req) -{ - return gen8_write_pdp(req, 0, px_dma(&ppgtt->pml4)); + memset_p((void **)pml4->pdps, vm->scratch_pdp, GEN8_PML4ES_PER_PML4); } /* PDE TLBs are a pain to invalidate on GEN8+. When we modify @@ -829,7 +858,7 @@ static int gen8_mm_switch_4lvl(struct i915_hw_ppgtt *ppgtt, */ static void mark_tlbs_dirty(struct i915_hw_ppgtt *ppgtt) { - ppgtt->pd_dirty_rings = INTEL_INFO(ppgtt->base.i915)->ring_mask; + ppgtt->pd_dirty_rings = INTEL_INFO(ppgtt->vm.i915)->ring_mask; } /* Removes entries from a single page table, releasing it if it's empty. @@ -843,7 +872,7 @@ static bool gen8_ppgtt_clear_pt(struct i915_address_space *vm, unsigned int pte = gen8_pte_index(start); unsigned int pte_end = pte + num_entries; const gen8_pte_t scratch_pte = - gen8_pte_encode(vm->scratch_page.daddr, I915_CACHE_LLC); + gen8_pte_encode(vm->scratch_page.daddr, I915_CACHE_LLC, 0); gen8_pte_t *vaddr; GEM_BUG_ON(num_entries > pt->used_ptes); @@ -1015,14 +1044,15 @@ gen8_ppgtt_insert_pte_entries(struct i915_hw_ppgtt *ppgtt, struct i915_page_directory_pointer *pdp, struct sgt_dma *iter, struct gen8_insert_pte *idx, - enum i915_cache_level cache_level) + enum i915_cache_level cache_level, + u32 flags) { struct i915_page_directory *pd; - const gen8_pte_t pte_encode = gen8_pte_encode(0, cache_level); + const gen8_pte_t pte_encode = gen8_pte_encode(0, cache_level, flags); gen8_pte_t *vaddr; bool ret; - GEM_BUG_ON(idx->pdpe >= i915_pdpes_per_pdp(&ppgtt->base)); + GEM_BUG_ON(idx->pdpe >= i915_pdpes_per_pdp(&ppgtt->vm)); pd = pdp->page_directory[idx->pdpe]; vaddr = kmap_atomic_px(pd->page_table[idx->pde]); do { @@ -1053,7 +1083,7 @@ gen8_ppgtt_insert_pte_entries(struct i915_hw_ppgtt *ppgtt, break; } - GEM_BUG_ON(idx->pdpe >= i915_pdpes_per_pdp(&ppgtt->base)); + GEM_BUG_ON(idx->pdpe >= i915_pdpes_per_pdp(&ppgtt->vm)); pd = pdp->page_directory[idx->pdpe]; } @@ -1069,14 +1099,14 @@ gen8_ppgtt_insert_pte_entries(struct i915_hw_ppgtt *ppgtt, static void gen8_ppgtt_insert_3lvl(struct i915_address_space *vm, struct i915_vma *vma, enum i915_cache_level cache_level, - u32 unused) + u32 flags) { struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm); struct sgt_dma iter = sgt_dma(vma); struct gen8_insert_pte idx = gen8_insert_pte(vma->node.start); gen8_ppgtt_insert_pte_entries(ppgtt, &ppgtt->pdp, &iter, &idx, - cache_level); + cache_level, flags); vma->page_sizes.gtt = I915_GTT_PAGE_SIZE; } @@ -1084,9 +1114,10 @@ static void gen8_ppgtt_insert_3lvl(struct i915_address_space *vm, static void gen8_ppgtt_insert_huge_entries(struct i915_vma *vma, struct i915_page_directory_pointer **pdps, struct sgt_dma *iter, - enum i915_cache_level cache_level) + enum i915_cache_level cache_level, + u32 flags) { - const gen8_pte_t pte_encode = gen8_pte_encode(0, cache_level); + const gen8_pte_t pte_encode = gen8_pte_encode(0, cache_level, flags); u64 start = vma->node.start; dma_addr_t rem = iter->sg->length; @@ -1172,6 +1203,27 @@ static void gen8_ppgtt_insert_huge_entries(struct i915_vma *vma, vaddr[idx.pde] |= GEN8_PDE_IPS_64K; kunmap_atomic(vaddr); page_size = I915_GTT_PAGE_SIZE_64K; + + /* + * We write all 4K page entries, even when using 64K + * pages. In order to verify that the HW isn't cheating + * by using the 4K PTE instead of the 64K PTE, we want + * to remove all the surplus entries. If the HW skipped + * the 64K PTE, it will read/write into the scratch page + * instead - which we detect as missing results during + * selftests. + */ + if (I915_SELFTEST_ONLY(vma->vm->scrub_64K)) { + u16 i; + + encode = pte_encode | vma->vm->scratch_page.daddr; + vaddr = kmap_atomic_px(pd->page_table[idx.pde]); + + for (i = 1; i < index; i += 16) + memset64(vaddr + i, encode, 15); + + kunmap_atomic(vaddr); + } } vma->page_sizes.gtt |= page_size; @@ -1181,19 +1233,21 @@ static void gen8_ppgtt_insert_huge_entries(struct i915_vma *vma, static void gen8_ppgtt_insert_4lvl(struct i915_address_space *vm, struct i915_vma *vma, enum i915_cache_level cache_level, - u32 unused) + u32 flags) { struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm); struct sgt_dma iter = sgt_dma(vma); struct i915_page_directory_pointer **pdps = ppgtt->pml4.pdps; if (vma->page_sizes.sg > I915_GTT_PAGE_SIZE) { - gen8_ppgtt_insert_huge_entries(vma, pdps, &iter, cache_level); + gen8_ppgtt_insert_huge_entries(vma, pdps, &iter, cache_level, + flags); } else { struct gen8_insert_pte idx = gen8_insert_pte(vma->node.start); while (gen8_ppgtt_insert_pte_entries(ppgtt, pdps[idx.pml4e++], - &iter, &idx, cache_level)) + &iter, &idx, cache_level, + flags)) GEM_BUG_ON(idx.pml4e >= GEN8_PML4ES_PER_PML4); vma->page_sizes.gtt = I915_GTT_PAGE_SIZE; @@ -1218,7 +1272,7 @@ static int gen8_init_scratch(struct i915_address_space *vm) { int ret; - ret = setup_scratch_page(vm, I915_GFP_DMA); + ret = setup_scratch_page(vm, __GFP_HIGHMEM); if (ret) return ret; @@ -1261,7 +1315,7 @@ free_scratch_page: static int gen8_ppgtt_notify_vgt(struct i915_hw_ppgtt *ppgtt, bool create) { - struct i915_address_space *vm = &ppgtt->base; + struct i915_address_space *vm = &ppgtt->vm; struct drm_i915_private *dev_priv = vm->i915; enum vgt_g2v_type msg; int i; @@ -1322,13 +1376,13 @@ static void gen8_ppgtt_cleanup_4lvl(struct i915_hw_ppgtt *ppgtt) int i; for (i = 0; i < GEN8_PML4ES_PER_PML4; i++) { - if (ppgtt->pml4.pdps[i] == ppgtt->base.scratch_pdp) + if (ppgtt->pml4.pdps[i] == ppgtt->vm.scratch_pdp) continue; - gen8_ppgtt_cleanup_3lvl(&ppgtt->base, ppgtt->pml4.pdps[i]); + gen8_ppgtt_cleanup_3lvl(&ppgtt->vm, ppgtt->pml4.pdps[i]); } - cleanup_px(&ppgtt->base, &ppgtt->pml4); + cleanup_px(&ppgtt->vm, &ppgtt->pml4); } static void gen8_ppgtt_cleanup(struct i915_address_space *vm) @@ -1342,7 +1396,7 @@ static void gen8_ppgtt_cleanup(struct i915_address_space *vm) if (use_4lvl(vm)) gen8_ppgtt_cleanup_4lvl(ppgtt); else - gen8_ppgtt_cleanup_3lvl(&ppgtt->base, &ppgtt->pdp); + gen8_ppgtt_cleanup_3lvl(&ppgtt->vm, &ppgtt->pdp); gen8_free_scratch(vm); } @@ -1478,7 +1532,7 @@ static void gen8_dump_pdp(struct i915_hw_ppgtt *ppgtt, gen8_pte_t scratch_pte, struct seq_file *m) { - struct i915_address_space *vm = &ppgtt->base; + struct i915_address_space *vm = &ppgtt->vm; struct i915_page_directory *pd; u32 pdpe; @@ -1488,7 +1542,7 @@ static void gen8_dump_pdp(struct i915_hw_ppgtt *ppgtt, u64 pd_start = start; u32 pde; - if (pdp->page_directory[pdpe] == ppgtt->base.scratch_pd) + if (pdp->page_directory[pdpe] == ppgtt->vm.scratch_pd) continue; seq_printf(m, "\tPDPE #%d\n", pdpe); @@ -1496,7 +1550,7 @@ static void gen8_dump_pdp(struct i915_hw_ppgtt *ppgtt, u32 pte; gen8_pte_t *pt_vaddr; - if (pd->page_table[pde] == ppgtt->base.scratch_pt) + if (pd->page_table[pde] == ppgtt->vm.scratch_pt) continue; pt_vaddr = kmap_atomic_px(pt); @@ -1529,10 +1583,10 @@ static void gen8_dump_pdp(struct i915_hw_ppgtt *ppgtt, static void gen8_dump_ppgtt(struct i915_hw_ppgtt *ppgtt, struct seq_file *m) { - struct i915_address_space *vm = &ppgtt->base; + struct i915_address_space *vm = &ppgtt->vm; const gen8_pte_t scratch_pte = - gen8_pte_encode(vm->scratch_page.daddr, I915_CACHE_LLC); - u64 start = 0, length = ppgtt->base.total; + gen8_pte_encode(vm->scratch_page.daddr, I915_CACHE_LLC, 0); + u64 start = 0, length = ppgtt->vm.total; if (use_4lvl(vm)) { u64 pml4e; @@ -1540,7 +1594,7 @@ static void gen8_dump_ppgtt(struct i915_hw_ppgtt *ppgtt, struct seq_file *m) struct i915_page_directory_pointer *pdp; gen8_for_each_pml4e(pdp, pml4, start, length, pml4e) { - if (pml4->pdps[pml4e] == ppgtt->base.scratch_pdp) + if (pml4->pdps[pml4e] == ppgtt->vm.scratch_pdp) continue; seq_printf(m, " PML4E #%llu\n", pml4e); @@ -1553,10 +1607,10 @@ static void gen8_dump_ppgtt(struct i915_hw_ppgtt *ppgtt, struct seq_file *m) static int gen8_preallocate_top_level_pdp(struct i915_hw_ppgtt *ppgtt) { - struct i915_address_space *vm = &ppgtt->base; + struct i915_address_space *vm = &ppgtt->vm; struct i915_page_directory_pointer *pdp = &ppgtt->pdp; struct i915_page_directory *pd; - u64 start = 0, length = ppgtt->base.total; + u64 start = 0, length = ppgtt->vm.total; u64 from = start; unsigned int pdpe; @@ -1590,211 +1644,153 @@ unwind: * space. * */ -static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt) +static struct i915_hw_ppgtt *gen8_ppgtt_create(struct drm_i915_private *i915) { - struct i915_address_space *vm = &ppgtt->base; - struct drm_i915_private *dev_priv = vm->i915; - int ret; + struct i915_hw_ppgtt *ppgtt; + int err; + + ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL); + if (!ppgtt) + return ERR_PTR(-ENOMEM); + + kref_init(&ppgtt->ref); - ppgtt->base.total = USES_FULL_48BIT_PPGTT(dev_priv) ? + ppgtt->vm.i915 = i915; + ppgtt->vm.dma = &i915->drm.pdev->dev; + + ppgtt->vm.total = USES_FULL_48BIT_PPGTT(i915) ? 1ULL << 48 : 1ULL << 32; + /* + * From bdw, there is support for read-only pages in the PPGTT. + * + * XXX GVT is not honouring the lack of RW in the PTE bits. + */ + ppgtt->vm.has_read_only = !intel_vgpu_active(i915); + + i915_address_space_init(&ppgtt->vm, i915); + /* There are only few exceptions for gen >=6. chv and bxt. * And we are not sure about the latter so play safe for now. */ - if (IS_CHERRYVIEW(dev_priv) || IS_BROXTON(dev_priv)) - ppgtt->base.pt_kmap_wc = true; + if (IS_CHERRYVIEW(i915) || IS_BROXTON(i915)) + ppgtt->vm.pt_kmap_wc = true; - ret = gen8_init_scratch(&ppgtt->base); - if (ret) { - ppgtt->base.total = 0; - return ret; - } + err = gen8_init_scratch(&ppgtt->vm); + if (err) + goto err_free; - if (use_4lvl(vm)) { - ret = setup_px(&ppgtt->base, &ppgtt->pml4); - if (ret) - goto free_scratch; + if (use_4lvl(&ppgtt->vm)) { + err = setup_px(&ppgtt->vm, &ppgtt->pml4); + if (err) + goto err_scratch; - gen8_initialize_pml4(&ppgtt->base, &ppgtt->pml4); + gen8_initialize_pml4(&ppgtt->vm, &ppgtt->pml4); - ppgtt->switch_mm = gen8_mm_switch_4lvl; - ppgtt->base.allocate_va_range = gen8_ppgtt_alloc_4lvl; - ppgtt->base.insert_entries = gen8_ppgtt_insert_4lvl; - ppgtt->base.clear_range = gen8_ppgtt_clear_4lvl; + ppgtt->vm.allocate_va_range = gen8_ppgtt_alloc_4lvl; + ppgtt->vm.insert_entries = gen8_ppgtt_insert_4lvl; + ppgtt->vm.clear_range = gen8_ppgtt_clear_4lvl; } else { - ret = __pdp_init(&ppgtt->base, &ppgtt->pdp); - if (ret) - goto free_scratch; + err = __pdp_init(&ppgtt->vm, &ppgtt->pdp); + if (err) + goto err_scratch; - if (intel_vgpu_active(dev_priv)) { - ret = gen8_preallocate_top_level_pdp(ppgtt); - if (ret) { + if (intel_vgpu_active(i915)) { + err = gen8_preallocate_top_level_pdp(ppgtt); + if (err) { __pdp_fini(&ppgtt->pdp); - goto free_scratch; + goto err_scratch; } } - ppgtt->switch_mm = gen8_mm_switch_3lvl; - ppgtt->base.allocate_va_range = gen8_ppgtt_alloc_3lvl; - ppgtt->base.insert_entries = gen8_ppgtt_insert_3lvl; - ppgtt->base.clear_range = gen8_ppgtt_clear_3lvl; + ppgtt->vm.allocate_va_range = gen8_ppgtt_alloc_3lvl; + ppgtt->vm.insert_entries = gen8_ppgtt_insert_3lvl; + ppgtt->vm.clear_range = gen8_ppgtt_clear_3lvl; } - if (intel_vgpu_active(dev_priv)) + if (intel_vgpu_active(i915)) gen8_ppgtt_notify_vgt(ppgtt, true); - ppgtt->base.cleanup = gen8_ppgtt_cleanup; - ppgtt->base.unbind_vma = ppgtt_unbind_vma; - ppgtt->base.bind_vma = ppgtt_bind_vma; - ppgtt->base.set_pages = ppgtt_set_pages; - ppgtt->base.clear_pages = clear_pages; + ppgtt->vm.cleanup = gen8_ppgtt_cleanup; ppgtt->debug_dump = gen8_dump_ppgtt; - return 0; + ppgtt->vm.vma_ops.bind_vma = ppgtt_bind_vma; + ppgtt->vm.vma_ops.unbind_vma = ppgtt_unbind_vma; + ppgtt->vm.vma_ops.set_pages = ppgtt_set_pages; + ppgtt->vm.vma_ops.clear_pages = clear_pages; -free_scratch: - gen8_free_scratch(&ppgtt->base); - return ret; + return ppgtt; + +err_scratch: + gen8_free_scratch(&ppgtt->vm); +err_free: + kfree(ppgtt); + return ERR_PTR(err); } -static void gen6_dump_ppgtt(struct i915_hw_ppgtt *ppgtt, struct seq_file *m) +static void gen6_dump_ppgtt(struct i915_hw_ppgtt *base, struct seq_file *m) { - struct i915_address_space *vm = &ppgtt->base; - struct i915_page_table *unused; - gen6_pte_t scratch_pte; - u32 pd_entry, pte, pde; - u32 start = 0, length = ppgtt->base.total; + struct gen6_hw_ppgtt *ppgtt = to_gen6_ppgtt(base); + const gen6_pte_t scratch_pte = ppgtt->scratch_pte; + struct i915_page_table *pt; + u32 pte, pde; - scratch_pte = vm->pte_encode(vm->scratch_page.daddr, - I915_CACHE_LLC, 0); + gen6_for_all_pdes(pt, &base->pd, pde) { + gen6_pte_t *vaddr; + + if (pt == base->vm.scratch_pt) + continue; + + if (i915_vma_is_bound(ppgtt->vma, I915_VMA_GLOBAL_BIND)) { + u32 expected = + GEN6_PDE_ADDR_ENCODE(px_dma(pt)) | + GEN6_PDE_VALID; + u32 pd_entry = readl(ppgtt->pd_addr + pde); - gen6_for_each_pde(unused, &ppgtt->pd, start, length, pde) { - u32 expected; - gen6_pte_t *pt_vaddr; - const dma_addr_t pt_addr = px_dma(ppgtt->pd.page_table[pde]); - pd_entry = readl(ppgtt->pd_addr + pde); - expected = (GEN6_PDE_ADDR_ENCODE(pt_addr) | GEN6_PDE_VALID); - - if (pd_entry != expected) - seq_printf(m, "\tPDE #%d mismatch: Actual PDE: %x Expected PDE: %x\n", - pde, - pd_entry, - expected); - seq_printf(m, "\tPDE: %x\n", pd_entry); - - pt_vaddr = kmap_atomic_px(ppgtt->pd.page_table[pde]); - - for (pte = 0; pte < GEN6_PTES; pte+=4) { - unsigned long va = - (pde * PAGE_SIZE * GEN6_PTES) + - (pte * PAGE_SIZE); + if (pd_entry != expected) + seq_printf(m, + "\tPDE #%d mismatch: Actual PDE: %x Expected PDE: %x\n", + pde, + pd_entry, + expected); + + seq_printf(m, "\tPDE: %x\n", pd_entry); + } + + vaddr = kmap_atomic_px(base->pd.page_table[pde]); + for (pte = 0; pte < GEN6_PTES; pte += 4) { int i; - bool found = false; + for (i = 0; i < 4; i++) - if (pt_vaddr[pte + i] != scratch_pte) - found = true; - if (!found) + if (vaddr[pte + i] != scratch_pte) + break; + if (i == 4) continue; - seq_printf(m, "\t\t0x%lx [%03d,%04d]: =", va, pde, pte); + seq_printf(m, "\t\t(%03d, %04d) %08lx: ", + pde, pte, + (pde * GEN6_PTES + pte) * PAGE_SIZE); for (i = 0; i < 4; i++) { - if (pt_vaddr[pte + i] != scratch_pte) - seq_printf(m, " %08x", pt_vaddr[pte + i]); + if (vaddr[pte + i] != scratch_pte) + seq_printf(m, " %08x", vaddr[pte + i]); else - seq_puts(m, " SCRATCH "); + seq_puts(m, " SCRATCH"); } seq_puts(m, "\n"); } - kunmap_atomic(pt_vaddr); + kunmap_atomic(vaddr); } } /* Write pde (index) from the page directory @pd to the page table @pt */ -static inline void gen6_write_pde(const struct i915_hw_ppgtt *ppgtt, +static inline void gen6_write_pde(const struct gen6_hw_ppgtt *ppgtt, const unsigned int pde, const struct i915_page_table *pt) { /* Caller needs to make sure the write completes if necessary */ - writel_relaxed(GEN6_PDE_ADDR_ENCODE(px_dma(pt)) | GEN6_PDE_VALID, - ppgtt->pd_addr + pde); -} - -/* Write all the page tables found in the ppgtt structure to incrementing page - * directories. */ -static void gen6_write_page_range(struct i915_hw_ppgtt *ppgtt, - u32 start, u32 length) -{ - struct i915_page_table *pt; - unsigned int pde; - - gen6_for_each_pde(pt, &ppgtt->pd, start, length, pde) - gen6_write_pde(ppgtt, pde, pt); - - mark_tlbs_dirty(ppgtt); - wmb(); -} - -static inline u32 get_pd_offset(struct i915_hw_ppgtt *ppgtt) -{ - GEM_BUG_ON(ppgtt->pd.base.ggtt_offset & 0x3f); - return ppgtt->pd.base.ggtt_offset << 10; -} - -static int hsw_mm_switch(struct i915_hw_ppgtt *ppgtt, - struct drm_i915_gem_request *req) -{ - struct intel_engine_cs *engine = req->engine; - u32 *cs; - - /* NB: TLBs must be flushed and invalidated before a switch */ - cs = intel_ring_begin(req, 6); - if (IS_ERR(cs)) - return PTR_ERR(cs); - - *cs++ = MI_LOAD_REGISTER_IMM(2); - *cs++ = i915_mmio_reg_offset(RING_PP_DIR_DCLV(engine)); - *cs++ = PP_DIR_DCLV_2G; - *cs++ = i915_mmio_reg_offset(RING_PP_DIR_BASE(engine)); - *cs++ = get_pd_offset(ppgtt); - *cs++ = MI_NOOP; - intel_ring_advance(req, cs); - - return 0; -} - -static int gen7_mm_switch(struct i915_hw_ppgtt *ppgtt, - struct drm_i915_gem_request *req) -{ - struct intel_engine_cs *engine = req->engine; - u32 *cs; - - /* NB: TLBs must be flushed and invalidated before a switch */ - cs = intel_ring_begin(req, 6); - if (IS_ERR(cs)) - return PTR_ERR(cs); - - *cs++ = MI_LOAD_REGISTER_IMM(2); - *cs++ = i915_mmio_reg_offset(RING_PP_DIR_DCLV(engine)); - *cs++ = PP_DIR_DCLV_2G; - *cs++ = i915_mmio_reg_offset(RING_PP_DIR_BASE(engine)); - *cs++ = get_pd_offset(ppgtt); - *cs++ = MI_NOOP; - intel_ring_advance(req, cs); - - return 0; -} - -static int gen6_mm_switch(struct i915_hw_ppgtt *ppgtt, - struct drm_i915_gem_request *req) -{ - struct intel_engine_cs *engine = req->engine; - struct drm_i915_private *dev_priv = req->i915; - - I915_WRITE(RING_PP_DIR_DCLV(engine), PP_DIR_DCLV_2G); - I915_WRITE(RING_PP_DIR_BASE(engine), get_pd_offset(ppgtt)); - return 0; + iowrite32(GEN6_PDE_ADDR_ENCODE(px_dma(pt)) | GEN6_PDE_VALID, + ppgtt->pd_addr + pde); } static void gen8_ppgtt_enable(struct drm_i915_private *dev_priv) @@ -1856,22 +1852,30 @@ static void gen6_ppgtt_enable(struct drm_i915_private *dev_priv) static void gen6_ppgtt_clear_range(struct i915_address_space *vm, u64 start, u64 length) { - struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm); + struct gen6_hw_ppgtt *ppgtt = to_gen6_ppgtt(i915_vm_to_ppgtt(vm)); unsigned int first_entry = start >> PAGE_SHIFT; unsigned int pde = first_entry / GEN6_PTES; unsigned int pte = first_entry % GEN6_PTES; unsigned int num_entries = length >> PAGE_SHIFT; - gen6_pte_t scratch_pte = - vm->pte_encode(vm->scratch_page.daddr, I915_CACHE_LLC, 0); + const gen6_pte_t scratch_pte = ppgtt->scratch_pte; while (num_entries) { - struct i915_page_table *pt = ppgtt->pd.page_table[pde++]; - unsigned int end = min(pte + num_entries, GEN6_PTES); + struct i915_page_table *pt = ppgtt->base.pd.page_table[pde++]; + const unsigned int end = min(pte + num_entries, GEN6_PTES); + const unsigned int count = end - pte; gen6_pte_t *vaddr; - num_entries -= end - pte; + GEM_BUG_ON(pt == vm->scratch_pt); + + num_entries -= count; + + GEM_BUG_ON(count > pt->used_ptes); + pt->used_ptes -= count; + if (!pt->used_ptes) + ppgtt->scan_for_unused_pt = true; - /* Note that the hw doesn't support removing PDE on the fly + /* + * Note that the hw doesn't support removing PDE on the fly * (they are cached inside the context with no means to * invalidate the cache), so we can only reset the PTE * entries back to scratch. @@ -1900,6 +1904,8 @@ static void gen6_ppgtt_insert_entries(struct i915_address_space *vm, struct sgt_dma iter = sgt_dma(vma); gen6_pte_t *vaddr; + GEM_BUG_ON(ppgtt->pd.page_table[act_pt] == vm->scratch_pt); + vaddr = kmap_atomic_px(ppgtt->pd.page_table[act_pt]); do { vaddr[act_pte] = pte_encode | GEN6_PTE_ADDR_ENCODE(iter.dma); @@ -1928,221 +1934,280 @@ static void gen6_ppgtt_insert_entries(struct i915_address_space *vm, static int gen6_alloc_va_range(struct i915_address_space *vm, u64 start, u64 length) { - struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm); + struct gen6_hw_ppgtt *ppgtt = to_gen6_ppgtt(i915_vm_to_ppgtt(vm)); struct i915_page_table *pt; u64 from = start; unsigned int pde; bool flush = false; - gen6_for_each_pde(pt, &ppgtt->pd, start, length, pde) { + gen6_for_each_pde(pt, &ppgtt->base.pd, start, length, pde) { + const unsigned int count = gen6_pte_count(start, length); + if (pt == vm->scratch_pt) { pt = alloc_pt(vm); if (IS_ERR(pt)) goto unwind_out; - gen6_initialize_pt(vm, pt); - ppgtt->pd.page_table[pde] = pt; - gen6_write_pde(ppgtt, pde, pt); - flush = true; + gen6_initialize_pt(ppgtt, pt); + ppgtt->base.pd.page_table[pde] = pt; + + if (i915_vma_is_bound(ppgtt->vma, + I915_VMA_GLOBAL_BIND)) { + gen6_write_pde(ppgtt, pde, pt); + flush = true; + } + + GEM_BUG_ON(pt->used_ptes); } + + pt->used_ptes += count; } if (flush) { - mark_tlbs_dirty(ppgtt); - wmb(); + mark_tlbs_dirty(&ppgtt->base); + gen6_ggtt_invalidate(ppgtt->base.vm.i915); } return 0; unwind_out: - gen6_ppgtt_clear_range(vm, from, start); + gen6_ppgtt_clear_range(vm, from, start - from); return -ENOMEM; } -static int gen6_init_scratch(struct i915_address_space *vm) +static int gen6_ppgtt_init_scratch(struct gen6_hw_ppgtt *ppgtt) { + struct i915_address_space * const vm = &ppgtt->base.vm; + struct i915_page_table *unused; + u32 pde; int ret; - ret = setup_scratch_page(vm, I915_GFP_DMA); + ret = setup_scratch_page(vm, __GFP_HIGHMEM); if (ret) return ret; + ppgtt->scratch_pte = + vm->pte_encode(vm->scratch_page.daddr, + I915_CACHE_NONE, PTE_READ_ONLY); + vm->scratch_pt = alloc_pt(vm); if (IS_ERR(vm->scratch_pt)) { cleanup_scratch_page(vm); return PTR_ERR(vm->scratch_pt); } - gen6_initialize_pt(vm, vm->scratch_pt); + gen6_initialize_pt(ppgtt, vm->scratch_pt); + gen6_for_all_pdes(unused, &ppgtt->base.pd, pde) + ppgtt->base.pd.page_table[pde] = vm->scratch_pt; return 0; } -static void gen6_free_scratch(struct i915_address_space *vm) +static void gen6_ppgtt_free_scratch(struct i915_address_space *vm) { free_pt(vm, vm->scratch_pt); cleanup_scratch_page(vm); } -static void gen6_ppgtt_cleanup(struct i915_address_space *vm) +static void gen6_ppgtt_free_pd(struct gen6_hw_ppgtt *ppgtt) { - struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm); - struct i915_page_directory *pd = &ppgtt->pd; struct i915_page_table *pt; u32 pde; - drm_mm_remove_node(&ppgtt->node); + gen6_for_all_pdes(pt, &ppgtt->base.pd, pde) + if (pt != ppgtt->base.vm.scratch_pt) + free_pt(&ppgtt->base.vm, pt); +} + +static void gen6_ppgtt_cleanup(struct i915_address_space *vm) +{ + struct gen6_hw_ppgtt *ppgtt = to_gen6_ppgtt(i915_vm_to_ppgtt(vm)); - gen6_for_all_pdes(pt, pd, pde) - if (pt != vm->scratch_pt) - free_pt(vm, pt); + i915_vma_destroy(ppgtt->vma); - gen6_free_scratch(vm); + gen6_ppgtt_free_pd(ppgtt); + gen6_ppgtt_free_scratch(vm); } -static int gen6_ppgtt_allocate_page_directories(struct i915_hw_ppgtt *ppgtt) +static int pd_vma_set_pages(struct i915_vma *vma) { - struct i915_address_space *vm = &ppgtt->base; - struct drm_i915_private *dev_priv = ppgtt->base.i915; - struct i915_ggtt *ggtt = &dev_priv->ggtt; - int ret; + vma->pages = ERR_PTR(-ENODEV); + return 0; +} - /* PPGTT PDEs reside in the GGTT and consists of 512 entries. The - * allocator works in address space sizes, so it's multiplied by page - * size. We allocate at the top of the GTT to avoid fragmentation. - */ - BUG_ON(!drm_mm_initialized(&ggtt->base.mm)); +static void pd_vma_clear_pages(struct i915_vma *vma) +{ + GEM_BUG_ON(!vma->pages); - ret = gen6_init_scratch(vm); - if (ret) - return ret; + vma->pages = NULL; +} - ret = i915_gem_gtt_insert(&ggtt->base, &ppgtt->node, - GEN6_PD_SIZE, GEN6_PD_ALIGN, - I915_COLOR_UNEVICTABLE, - 0, ggtt->base.total, - PIN_HIGH); - if (ret) - goto err_out; +static int pd_vma_bind(struct i915_vma *vma, + enum i915_cache_level cache_level, + u32 unused) +{ + struct i915_ggtt *ggtt = i915_vm_to_ggtt(vma->vm); + struct gen6_hw_ppgtt *ppgtt = vma->private; + u32 ggtt_offset = i915_ggtt_offset(vma) / PAGE_SIZE; + struct i915_page_table *pt; + unsigned int pde; - if (ppgtt->node.start < ggtt->mappable_end) - DRM_DEBUG("Forced to use aperture for PDEs\n"); + ppgtt->base.pd.base.ggtt_offset = ggtt_offset * sizeof(gen6_pte_t); + ppgtt->pd_addr = (gen6_pte_t __iomem *)ggtt->gsm + ggtt_offset; - ppgtt->pd.base.ggtt_offset = - ppgtt->node.start / PAGE_SIZE * sizeof(gen6_pte_t); + gen6_for_all_pdes(pt, &ppgtt->base.pd, pde) + gen6_write_pde(ppgtt, pde, pt); - ppgtt->pd_addr = (gen6_pte_t __iomem *)ggtt->gsm + - ppgtt->pd.base.ggtt_offset / sizeof(gen6_pte_t); + mark_tlbs_dirty(&ppgtt->base); + gen6_ggtt_invalidate(ppgtt->base.vm.i915); return 0; - -err_out: - gen6_free_scratch(vm); - return ret; } -static int gen6_ppgtt_alloc(struct i915_hw_ppgtt *ppgtt) +static void pd_vma_unbind(struct i915_vma *vma) { - return gen6_ppgtt_allocate_page_directories(ppgtt); -} + struct gen6_hw_ppgtt *ppgtt = vma->private; + struct i915_page_table * const scratch_pt = ppgtt->base.vm.scratch_pt; + struct i915_page_table *pt; + unsigned int pde; -static void gen6_scratch_va_range(struct i915_hw_ppgtt *ppgtt, - u64 start, u64 length) -{ - struct i915_page_table *unused; - u32 pde; + if (!ppgtt->scan_for_unused_pt) + return; - gen6_for_each_pde(unused, &ppgtt->pd, start, length, pde) - ppgtt->pd.page_table[pde] = ppgtt->base.scratch_pt; + /* Free all no longer used page tables */ + gen6_for_all_pdes(pt, &ppgtt->base.pd, pde) { + if (pt->used_ptes || pt == scratch_pt) + continue; + + free_pt(&ppgtt->base.vm, pt); + ppgtt->base.pd.page_table[pde] = scratch_pt; + } + + ppgtt->scan_for_unused_pt = false; } -static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt) -{ - struct drm_i915_private *dev_priv = ppgtt->base.i915; - struct i915_ggtt *ggtt = &dev_priv->ggtt; - int ret; +static const struct i915_vma_ops pd_vma_ops = { + .set_pages = pd_vma_set_pages, + .clear_pages = pd_vma_clear_pages, + .bind_vma = pd_vma_bind, + .unbind_vma = pd_vma_unbind, +}; - ppgtt->base.pte_encode = ggtt->base.pte_encode; - if (intel_vgpu_active(dev_priv) || IS_GEN6(dev_priv)) - ppgtt->switch_mm = gen6_mm_switch; - else if (IS_HASWELL(dev_priv)) - ppgtt->switch_mm = hsw_mm_switch; - else if (IS_GEN7(dev_priv)) - ppgtt->switch_mm = gen7_mm_switch; - else - BUG(); +static struct i915_vma *pd_vma_create(struct gen6_hw_ppgtt *ppgtt, int size) +{ + struct drm_i915_private *i915 = ppgtt->base.vm.i915; + struct i915_ggtt *ggtt = &i915->ggtt; + struct i915_vma *vma; - ret = gen6_ppgtt_alloc(ppgtt); - if (ret) - return ret; + GEM_BUG_ON(!IS_ALIGNED(size, I915_GTT_PAGE_SIZE)); + GEM_BUG_ON(size > ggtt->vm.total); - ppgtt->base.total = I915_PDES * GEN6_PTES * PAGE_SIZE; + vma = kmem_cache_zalloc(i915->vmas, GFP_KERNEL); + if (!vma) + return ERR_PTR(-ENOMEM); - gen6_scratch_va_range(ppgtt, 0, ppgtt->base.total); - gen6_write_page_range(ppgtt, 0, ppgtt->base.total); + init_request_active(&vma->last_fence, NULL); - ret = gen6_alloc_va_range(&ppgtt->base, 0, ppgtt->base.total); - if (ret) { - gen6_ppgtt_cleanup(&ppgtt->base); - return ret; - } + vma->vm = &ggtt->vm; + vma->ops = &pd_vma_ops; + vma->private = ppgtt; - ppgtt->base.clear_range = gen6_ppgtt_clear_range; - ppgtt->base.insert_entries = gen6_ppgtt_insert_entries; - ppgtt->base.unbind_vma = ppgtt_unbind_vma; - ppgtt->base.bind_vma = ppgtt_bind_vma; - ppgtt->base.set_pages = ppgtt_set_pages; - ppgtt->base.clear_pages = clear_pages; - ppgtt->base.cleanup = gen6_ppgtt_cleanup; - ppgtt->debug_dump = gen6_dump_ppgtt; + vma->active = RB_ROOT; - DRM_DEBUG_DRIVER("Allocated pde space (%lldM) at GTT entry: %llx\n", - ppgtt->node.size >> 20, - ppgtt->node.start / PAGE_SIZE); + vma->size = size; + vma->fence_size = size; + vma->flags = I915_VMA_GGTT; + vma->ggtt_view.type = I915_GGTT_VIEW_ROTATED; /* prevent fencing */ - DRM_DEBUG_DRIVER("Adding PPGTT at offset %x\n", - ppgtt->pd.base.ggtt_offset << 10); + INIT_LIST_HEAD(&vma->obj_link); + list_add(&vma->vm_link, &vma->vm->unbound_list); - return 0; + return vma; } -static int __hw_ppgtt_init(struct i915_hw_ppgtt *ppgtt, - struct drm_i915_private *dev_priv) +int gen6_ppgtt_pin(struct i915_hw_ppgtt *base) { - ppgtt->base.i915 = dev_priv; - ppgtt->base.dma = &dev_priv->drm.pdev->dev; + struct gen6_hw_ppgtt *ppgtt = to_gen6_ppgtt(base); - if (INTEL_INFO(dev_priv)->gen < 8) - return gen6_ppgtt_init(ppgtt); - else - return gen8_ppgtt_init(ppgtt); + /* + * Workaround the limited maximum vma->pin_count and the aliasing_ppgtt + * which will be pinned into every active context. + * (When vma->pin_count becomes atomic, I expect we will naturally + * need a larger, unpacked, type and kill this redundancy.) + */ + if (ppgtt->pin_count++) + return 0; + + /* + * PPGTT PDEs reside in the GGTT and consists of 512 entries. The + * allocator works in address space sizes, so it's multiplied by page + * size. We allocate at the top of the GTT to avoid fragmentation. + */ + return i915_vma_pin(ppgtt->vma, + 0, GEN6_PD_ALIGN, + PIN_GLOBAL | PIN_HIGH); } -static void i915_address_space_init(struct i915_address_space *vm, - struct drm_i915_private *dev_priv, - const char *name) +void gen6_ppgtt_unpin(struct i915_hw_ppgtt *base) { - i915_gem_timeline_init(dev_priv, &vm->timeline, name); - - drm_mm_init(&vm->mm, 0, vm->total); - vm->mm.head_node.color = I915_COLOR_UNEVICTABLE; + struct gen6_hw_ppgtt *ppgtt = to_gen6_ppgtt(base); - INIT_LIST_HEAD(&vm->active_list); - INIT_LIST_HEAD(&vm->inactive_list); - INIT_LIST_HEAD(&vm->unbound_list); + GEM_BUG_ON(!ppgtt->pin_count); + if (--ppgtt->pin_count) + return; - list_add_tail(&vm->global_link, &dev_priv->vm_list); - pagevec_init(&vm->free_pages); + i915_vma_unpin(ppgtt->vma); } -static void i915_address_space_fini(struct i915_address_space *vm) +static struct i915_hw_ppgtt *gen6_ppgtt_create(struct drm_i915_private *i915) { - if (pagevec_count(&vm->free_pages)) - vm_free_pages_release(vm, true); + struct i915_ggtt * const ggtt = &i915->ggtt; + struct gen6_hw_ppgtt *ppgtt; + int err; - i915_gem_timeline_fini(&vm->timeline); - drm_mm_takedown(&vm->mm); - list_del(&vm->global_link); + ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL); + if (!ppgtt) + return ERR_PTR(-ENOMEM); + + kref_init(&ppgtt->base.ref); + + ppgtt->base.vm.i915 = i915; + ppgtt->base.vm.dma = &i915->drm.pdev->dev; + + ppgtt->base.vm.total = I915_PDES * GEN6_PTES * PAGE_SIZE; + + i915_address_space_init(&ppgtt->base.vm, i915); + + ppgtt->base.vm.allocate_va_range = gen6_alloc_va_range; + ppgtt->base.vm.clear_range = gen6_ppgtt_clear_range; + ppgtt->base.vm.insert_entries = gen6_ppgtt_insert_entries; + ppgtt->base.vm.cleanup = gen6_ppgtt_cleanup; + ppgtt->base.debug_dump = gen6_dump_ppgtt; + + ppgtt->base.vm.vma_ops.bind_vma = ppgtt_bind_vma; + ppgtt->base.vm.vma_ops.unbind_vma = ppgtt_unbind_vma; + ppgtt->base.vm.vma_ops.set_pages = ppgtt_set_pages; + ppgtt->base.vm.vma_ops.clear_pages = clear_pages; + + ppgtt->base.vm.pte_encode = ggtt->vm.pte_encode; + + err = gen6_ppgtt_init_scratch(ppgtt); + if (err) + goto err_free; + + ppgtt->vma = pd_vma_create(ppgtt, GEN6_PD_SIZE); + if (IS_ERR(ppgtt->vma)) { + err = PTR_ERR(ppgtt->vma); + goto err_scratch; + } + + return &ppgtt->base; + +err_scratch: + gen6_ppgtt_free_scratch(&ppgtt->base.vm); +err_free: + kfree(ppgtt); + return ERR_PTR(err); } static void gtt_write_workarounds(struct drm_i915_private *dev_priv) @@ -2151,15 +2216,15 @@ static void gtt_write_workarounds(struct drm_i915_private *dev_priv) * called on driver load and after a GPU reset, so you can place * workarounds here even if they get overwritten by GPU reset. */ - /* WaIncreaseDefaultTLBEntries:chv,bdw,skl,bxt,kbl,glk,cfl,cnl */ + /* WaIncreaseDefaultTLBEntries:chv,bdw,skl,bxt,kbl,glk,cfl,cnl,icl */ if (IS_BROADWELL(dev_priv)) I915_WRITE(GEN8_L3_LRA_1_GPGPU, GEN8_L3_LRA_1_GPGPU_DEFAULT_VALUE_BDW); else if (IS_CHERRYVIEW(dev_priv)) I915_WRITE(GEN8_L3_LRA_1_GPGPU, GEN8_L3_LRA_1_GPGPU_DEFAULT_VALUE_CHV); - else if (IS_GEN9_BC(dev_priv) || IS_GEN10(dev_priv)) - I915_WRITE(GEN8_L3_LRA_1_GPGPU, GEN9_L3_LRA_1_GPGPU_DEFAULT_VALUE_SKL); else if (IS_GEN9_LP(dev_priv)) I915_WRITE(GEN8_L3_LRA_1_GPGPU, GEN9_L3_LRA_1_GPGPU_DEFAULT_VALUE_BXT); + else if (INTEL_GEN(dev_priv) >= 9) + I915_WRITE(GEN8_L3_LRA_1_GPGPU, GEN9_L3_LRA_1_GPGPU_DEFAULT_VALUE_SKL); /* * To support 64K PTEs we need to first enable the use of the @@ -2204,35 +2269,40 @@ int i915_ppgtt_init_hw(struct drm_i915_private *dev_priv) return 0; } +static struct i915_hw_ppgtt * +__hw_ppgtt_create(struct drm_i915_private *i915) +{ + if (INTEL_GEN(i915) < 8) + return gen6_ppgtt_create(i915); + else + return gen8_ppgtt_create(i915); +} + struct i915_hw_ppgtt * -i915_ppgtt_create(struct drm_i915_private *dev_priv, - struct drm_i915_file_private *fpriv, - const char *name) +i915_ppgtt_create(struct drm_i915_private *i915, + struct drm_i915_file_private *fpriv) { struct i915_hw_ppgtt *ppgtt; - int ret; - - ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL); - if (!ppgtt) - return ERR_PTR(-ENOMEM); - ret = __hw_ppgtt_init(ppgtt, dev_priv); - if (ret) { - kfree(ppgtt); - return ERR_PTR(ret); - } + ppgtt = __hw_ppgtt_create(i915); + if (IS_ERR(ppgtt)) + return ppgtt; - kref_init(&ppgtt->ref); - i915_address_space_init(&ppgtt->base, dev_priv, name); - ppgtt->base.file = fpriv; + ppgtt->vm.file = fpriv; - trace_i915_ppgtt_create(&ppgtt->base); + trace_i915_ppgtt_create(&ppgtt->vm); return ppgtt; } void i915_ppgtt_close(struct i915_address_space *vm) { + GEM_BUG_ON(vm->closed); + vm->closed = true; +} + +static void ppgtt_destroy_vma(struct i915_address_space *vm) +{ struct list_head *phases[] = { &vm->active_list, &vm->inactive_list, @@ -2240,15 +2310,12 @@ void i915_ppgtt_close(struct i915_address_space *vm) NULL, }, **phase; - GEM_BUG_ON(vm->closed); vm->closed = true; - for (phase = phases; *phase; phase++) { struct i915_vma *vma, *vn; list_for_each_entry_safe(vma, vn, *phase, vm_link) - if (!i915_vma_is_closed(vma)) - i915_vma_close(vma); + i915_vma_destroy(vma); } } @@ -2257,15 +2324,16 @@ void i915_ppgtt_release(struct kref *kref) struct i915_hw_ppgtt *ppgtt = container_of(kref, struct i915_hw_ppgtt, ref); - trace_i915_ppgtt_release(&ppgtt->base); + trace_i915_ppgtt_release(&ppgtt->vm); + + ppgtt_destroy_vma(&ppgtt->vm); - /* vmas should already be unbound and destroyed */ - WARN_ON(!list_empty(&ppgtt->base.active_list)); - WARN_ON(!list_empty(&ppgtt->base.inactive_list)); - WARN_ON(!list_empty(&ppgtt->base.unbound_list)); + GEM_BUG_ON(!list_empty(&ppgtt->vm.active_list)); + GEM_BUG_ON(!list_empty(&ppgtt->vm.inactive_list)); + GEM_BUG_ON(!list_empty(&ppgtt->vm.unbound_list)); - ppgtt->base.cleanup(&ppgtt->base); - i915_address_space_fini(&ppgtt->base); + ppgtt->vm.cleanup(&ppgtt->vm); + i915_address_space_fini(&ppgtt->vm); kfree(ppgtt); } @@ -2361,7 +2429,7 @@ void i915_gem_suspend_gtt_mappings(struct drm_i915_private *dev_priv) i915_check_and_clear_faults(dev_priv); - ggtt->base.clear_range(&ggtt->base, 0, ggtt->base.total); + ggtt->vm.clear_range(&ggtt->vm, 0, ggtt->vm.total); i915_ggtt_invalidate(dev_priv); } @@ -2370,9 +2438,10 @@ int i915_gem_gtt_prepare_pages(struct drm_i915_gem_object *obj, struct sg_table *pages) { do { - if (dma_map_sg(&obj->base.dev->pdev->dev, - pages->sgl, pages->nents, - PCI_DMA_BIDIRECTIONAL)) + if (dma_map_sg_attrs(&obj->base.dev->pdev->dev, + pages->sgl, pages->nents, + PCI_DMA_BIDIRECTIONAL, + DMA_ATTR_NO_WARN)) return 0; /* If the DMA remap fails, one cause can be that we have @@ -2406,7 +2475,7 @@ static void gen8_ggtt_insert_page(struct i915_address_space *vm, gen8_pte_t __iomem *pte = (gen8_pte_t __iomem *)ggtt->gsm + (offset >> PAGE_SHIFT); - gen8_set_pte(pte, gen8_pte_encode(addr, level)); + gen8_set_pte(pte, gen8_pte_encode(addr, level, 0)); ggtt->invalidate(vm->i915); } @@ -2414,24 +2483,27 @@ static void gen8_ggtt_insert_page(struct i915_address_space *vm, static void gen8_ggtt_insert_entries(struct i915_address_space *vm, struct i915_vma *vma, enum i915_cache_level level, - u32 unused) + u32 flags) { struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm); struct sgt_iter sgt_iter; gen8_pte_t __iomem *gtt_entries; - const gen8_pte_t pte_encode = gen8_pte_encode(0, level); + const gen8_pte_t pte_encode = gen8_pte_encode(0, level, 0); dma_addr_t addr; + /* + * Note that we ignore PTE_READ_ONLY here. The caller must be careful + * not to allow the user to override access to a read only page. + */ + gtt_entries = (gen8_pte_t __iomem *)ggtt->gsm; gtt_entries += vma->node.start >> PAGE_SHIFT; for_each_sgt_dma(addr, sgt_iter, vma->pages) gen8_set_pte(gtt_entries++, pte_encode | addr); - wmb(); - - /* This next bit makes the above posting read even more important. We - * want to flush the TLBs only after we're certain all the PTE updates - * have finished. + /* + * We want to flush the TLBs only after we're certain all the PTE + * updates have finished. */ ggtt->invalidate(vm->i915); } @@ -2469,11 +2541,10 @@ static void gen6_ggtt_insert_entries(struct i915_address_space *vm, dma_addr_t addr; for_each_sgt_dma(addr, iter, vma->pages) iowrite32(vm->pte_encode(addr, level, flags), &entries[i++]); - wmb(); - /* This next bit makes the above posting read even more important. We - * want to flush the TLBs only after we're certain all the PTE updates - * have finished. + /* + * We want to flush the TLBs only after we're certain all the PTE + * updates have finished. */ ggtt->invalidate(vm->i915); } @@ -2490,7 +2561,7 @@ static void gen8_ggtt_clear_range(struct i915_address_space *vm, unsigned first_entry = start >> PAGE_SHIFT; unsigned num_entries = length >> PAGE_SHIFT; const gen8_pte_t scratch_pte = - gen8_pte_encode(vm->scratch_page.daddr, I915_CACHE_LLC); + gen8_pte_encode(vm->scratch_page.daddr, I915_CACHE_LLC, 0); gen8_pte_t __iomem *gtt_base = (gen8_pte_t __iomem *)ggtt->gsm + first_entry; const int max_entries = ggtt_total_entries(ggtt) - first_entry; @@ -2551,13 +2622,14 @@ struct insert_entries { struct i915_address_space *vm; struct i915_vma *vma; enum i915_cache_level level; + u32 flags; }; static int bxt_vtd_ggtt_insert_entries__cb(void *_arg) { struct insert_entries *arg = _arg; - gen8_ggtt_insert_entries(arg->vm, arg->vma, arg->level, 0); + gen8_ggtt_insert_entries(arg->vm, arg->vma, arg->level, arg->flags); bxt_vtd_ggtt_wa(arg->vm); return 0; @@ -2566,9 +2638,9 @@ static int bxt_vtd_ggtt_insert_entries__cb(void *_arg) static void bxt_vtd_ggtt_insert_entries__BKL(struct i915_address_space *vm, struct i915_vma *vma, enum i915_cache_level level, - u32 unused) + u32 flags) { - struct insert_entries arg = { vm, vma, level }; + struct insert_entries arg = { vm, vma, level, flags }; stop_machine(bxt_vtd_ggtt_insert_entries__cb, &arg, NULL); } @@ -2659,9 +2731,9 @@ static int ggtt_bind_vma(struct i915_vma *vma, struct drm_i915_gem_object *obj = vma->obj; u32 pte_flags; - /* Currently applicable only to VLV */ + /* Applicable to VLV (gen8+ do not support RO in the GGTT) */ pte_flags = 0; - if (obj->gt_ro) + if (i915_gem_object_is_readonly(obj)) pte_flags |= PTE_READ_ONLY; intel_runtime_pm_get(i915); @@ -2699,23 +2771,22 @@ static int aliasing_gtt_bind_vma(struct i915_vma *vma, /* Currently applicable only to VLV */ pte_flags = 0; - if (vma->obj->gt_ro) + if (i915_gem_object_is_readonly(vma->obj)) pte_flags |= PTE_READ_ONLY; if (flags & I915_VMA_LOCAL_BIND) { struct i915_hw_ppgtt *appgtt = i915->mm.aliasing_ppgtt; - if (!(vma->flags & I915_VMA_LOCAL_BIND) && - appgtt->base.allocate_va_range) { - ret = appgtt->base.allocate_va_range(&appgtt->base, - vma->node.start, - vma->size); + if (!(vma->flags & I915_VMA_LOCAL_BIND)) { + ret = appgtt->vm.allocate_va_range(&appgtt->vm, + vma->node.start, + vma->size); if (ret) return ret; } - appgtt->base.insert_entries(&appgtt->base, vma, cache_level, - pte_flags); + appgtt->vm.insert_entries(&appgtt->vm, vma, cache_level, + pte_flags); } if (flags & I915_VMA_GLOBAL_BIND) { @@ -2738,7 +2809,7 @@ static void aliasing_gtt_unbind_vma(struct i915_vma *vma) } if (vma->flags & I915_VMA_LOCAL_BIND) { - struct i915_address_space *vm = &i915->mm.aliasing_ppgtt->base; + struct i915_address_space *vm = &i915->mm.aliasing_ppgtt->vm; vm->clear_range(vm, vma->node.start, vma->size); } @@ -2752,7 +2823,7 @@ void i915_gem_gtt_finish_pages(struct drm_i915_gem_object *obj, struct i915_ggtt *ggtt = &dev_priv->ggtt; if (unlikely(ggtt->do_idle_maps)) { - if (i915_gem_wait_for_idle(dev_priv, 0)) { + if (i915_gem_wait_for_idle(dev_priv, 0, MAX_SCHEDULE_TIMEOUT)) { DRM_ERROR("Failed to wait for idle; VT'd may hang.\n"); /* Wait a bit, in hopes it avoids the hang */ udelay(10); @@ -2801,34 +2872,32 @@ int i915_gem_init_aliasing_ppgtt(struct drm_i915_private *i915) struct i915_hw_ppgtt *ppgtt; int err; - ppgtt = i915_ppgtt_create(i915, ERR_PTR(-EPERM), "[alias]"); + ppgtt = i915_ppgtt_create(i915, ERR_PTR(-EPERM)); if (IS_ERR(ppgtt)) return PTR_ERR(ppgtt); - if (WARN_ON(ppgtt->base.total < ggtt->base.total)) { + if (GEM_WARN_ON(ppgtt->vm.total < ggtt->vm.total)) { err = -ENODEV; goto err_ppgtt; } - if (ppgtt->base.allocate_va_range) { - /* Note we only pre-allocate as far as the end of the global - * GTT. On 48b / 4-level page-tables, the difference is very, - * very significant! We have to preallocate as GVT/vgpu does - * not like the page directory disappearing. - */ - err = ppgtt->base.allocate_va_range(&ppgtt->base, - 0, ggtt->base.total); - if (err) - goto err_ppgtt; - } + /* + * Note we only pre-allocate as far as the end of the global + * GTT. On 48b / 4-level page-tables, the difference is very, + * very significant! We have to preallocate as GVT/vgpu does + * not like the page directory disappearing. + */ + err = ppgtt->vm.allocate_va_range(&ppgtt->vm, 0, ggtt->vm.total); + if (err) + goto err_ppgtt; i915->mm.aliasing_ppgtt = ppgtt; - WARN_ON(ggtt->base.bind_vma != ggtt_bind_vma); - ggtt->base.bind_vma = aliasing_gtt_bind_vma; + GEM_BUG_ON(ggtt->vm.vma_ops.bind_vma != ggtt_bind_vma); + ggtt->vm.vma_ops.bind_vma = aliasing_gtt_bind_vma; - WARN_ON(ggtt->base.unbind_vma != ggtt_unbind_vma); - ggtt->base.unbind_vma = aliasing_gtt_unbind_vma; + GEM_BUG_ON(ggtt->vm.vma_ops.unbind_vma != ggtt_unbind_vma); + ggtt->vm.vma_ops.unbind_vma = aliasing_gtt_unbind_vma; return 0; @@ -2848,8 +2917,8 @@ void i915_gem_fini_aliasing_ppgtt(struct drm_i915_private *i915) i915_ppgtt_put(ppgtt); - ggtt->base.bind_vma = ggtt_bind_vma; - ggtt->base.unbind_vma = ggtt_unbind_vma; + ggtt->vm.vma_ops.bind_vma = ggtt_bind_vma; + ggtt->vm.vma_ops.unbind_vma = ggtt_unbind_vma; } int i915_gem_init_ggtt(struct drm_i915_private *dev_priv) @@ -2873,7 +2942,7 @@ int i915_gem_init_ggtt(struct drm_i915_private *dev_priv) return ret; /* Reserve a mappable slot for our lockless error capture */ - ret = drm_mm_insert_node_in_range(&ggtt->base.mm, &ggtt->error_capture, + ret = drm_mm_insert_node_in_range(&ggtt->vm.mm, &ggtt->error_capture, PAGE_SIZE, 0, I915_COLOR_UNEVICTABLE, 0, ggtt->mappable_end, DRM_MM_INSERT_LOW); @@ -2881,16 +2950,15 @@ int i915_gem_init_ggtt(struct drm_i915_private *dev_priv) return ret; /* Clear any non-preallocated blocks */ - drm_mm_for_each_hole(entry, &ggtt->base.mm, hole_start, hole_end) { + drm_mm_for_each_hole(entry, &ggtt->vm.mm, hole_start, hole_end) { DRM_DEBUG_KMS("clearing unused GTT space: [%lx, %lx]\n", hole_start, hole_end); - ggtt->base.clear_range(&ggtt->base, hole_start, - hole_end - hole_start); + ggtt->vm.clear_range(&ggtt->vm, hole_start, + hole_end - hole_start); } /* And finally clear the reserved guard page */ - ggtt->base.clear_range(&ggtt->base, - ggtt->base.total - PAGE_SIZE, PAGE_SIZE); + ggtt->vm.clear_range(&ggtt->vm, ggtt->vm.total - PAGE_SIZE, PAGE_SIZE); if (USES_PPGTT(dev_priv) && !USES_FULL_PPGTT(dev_priv)) { ret = i915_gem_init_aliasing_ppgtt(dev_priv); @@ -2915,30 +2983,26 @@ void i915_ggtt_cleanup_hw(struct drm_i915_private *dev_priv) struct i915_vma *vma, *vn; struct pagevec *pvec; - ggtt->base.closed = true; - - mutex_lock(&dev_priv->drm.struct_mutex); - WARN_ON(!list_empty(&ggtt->base.active_list)); - list_for_each_entry_safe(vma, vn, &ggtt->base.inactive_list, vm_link) - WARN_ON(i915_vma_unbind(vma)); - mutex_unlock(&dev_priv->drm.struct_mutex); - - i915_gem_cleanup_stolen(&dev_priv->drm); + ggtt->vm.closed = true; mutex_lock(&dev_priv->drm.struct_mutex); i915_gem_fini_aliasing_ppgtt(dev_priv); + GEM_BUG_ON(!list_empty(&ggtt->vm.active_list)); + list_for_each_entry_safe(vma, vn, &ggtt->vm.inactive_list, vm_link) + WARN_ON(i915_vma_unbind(vma)); + if (drm_mm_node_allocated(&ggtt->error_capture)) drm_mm_remove_node(&ggtt->error_capture); - if (drm_mm_initialized(&ggtt->base.mm)) { + if (drm_mm_initialized(&ggtt->vm.mm)) { intel_vgt_deballoon(dev_priv); - i915_address_space_fini(&ggtt->base); + i915_address_space_fini(&ggtt->vm); } - ggtt->base.cleanup(&ggtt->base); + ggtt->vm.cleanup(&ggtt->vm); - pvec = &dev_priv->mm.wc_stash; + pvec = &dev_priv->mm.wc_stash.pvec; if (pvec->nr) { set_pages_array_wb(pvec->pages, pvec->nr); __pagevec_release(pvec); @@ -2948,6 +3012,8 @@ void i915_ggtt_cleanup_hw(struct drm_i915_private *dev_priv) arch_phys_wc_del(ggtt->mtrr); io_mapping_fini(&ggtt->iomap); + + i915_gem_cleanup_stolen(&dev_priv->drm); } static unsigned int gen6_get_total_gtt_size(u16 snb_gmch_ctl) @@ -2986,7 +3052,7 @@ static unsigned int chv_get_total_gtt_size(u16 gmch_ctrl) static int ggtt_probe_common(struct i915_ggtt *ggtt, u64 size) { - struct drm_i915_private *dev_priv = ggtt->base.i915; + struct drm_i915_private *dev_priv = ggtt->vm.i915; struct pci_dev *pdev = dev_priv->drm.pdev; phys_addr_t phys_addr; int ret; @@ -3010,7 +3076,7 @@ static int ggtt_probe_common(struct i915_ggtt *ggtt, u64 size) return -ENOMEM; } - ret = setup_scratch_page(&ggtt->base, GFP_DMA32); + ret = setup_scratch_page(&ggtt->vm, GFP_DMA32); if (ret) { DRM_ERROR("Scratch setup failed\n"); /* iounmap will also get called at remove, but meh */ @@ -3316,7 +3382,7 @@ static void setup_private_pat(struct drm_i915_private *dev_priv) static int gen8_gmch_probe(struct i915_ggtt *ggtt) { - struct drm_i915_private *dev_priv = ggtt->base.i915; + struct drm_i915_private *dev_priv = ggtt->vm.i915; struct pci_dev *pdev = dev_priv->drm.pdev; unsigned int size; u16 snb_gmch_ctl; @@ -3335,38 +3401,35 @@ static int gen8_gmch_probe(struct i915_ggtt *ggtt) DRM_ERROR("Can't set DMA mask/consistent mask (%d)\n", err); pci_read_config_word(pdev, SNB_GMCH_CTRL, &snb_gmch_ctl); - - if (INTEL_GEN(dev_priv) >= 9) { - size = gen8_get_total_gtt_size(snb_gmch_ctl); - } else if (IS_CHERRYVIEW(dev_priv)) { + if (IS_CHERRYVIEW(dev_priv)) size = chv_get_total_gtt_size(snb_gmch_ctl); - } else { + else size = gen8_get_total_gtt_size(snb_gmch_ctl); - } - ggtt->base.total = (size / sizeof(gen8_pte_t)) << PAGE_SHIFT; - ggtt->base.cleanup = gen6_gmch_remove; - ggtt->base.bind_vma = ggtt_bind_vma; - ggtt->base.unbind_vma = ggtt_unbind_vma; - ggtt->base.set_pages = ggtt_set_pages; - ggtt->base.clear_pages = clear_pages; - ggtt->base.insert_page = gen8_ggtt_insert_page; - ggtt->base.clear_range = nop_clear_range; + ggtt->vm.total = (size / sizeof(gen8_pte_t)) << PAGE_SHIFT; + ggtt->vm.cleanup = gen6_gmch_remove; + ggtt->vm.insert_page = gen8_ggtt_insert_page; + ggtt->vm.clear_range = nop_clear_range; if (!USES_FULL_PPGTT(dev_priv) || intel_scanout_needs_vtd_wa(dev_priv)) - ggtt->base.clear_range = gen8_ggtt_clear_range; + ggtt->vm.clear_range = gen8_ggtt_clear_range; - ggtt->base.insert_entries = gen8_ggtt_insert_entries; + ggtt->vm.insert_entries = gen8_ggtt_insert_entries; /* Serialize GTT updates with aperture access on BXT if VT-d is on. */ if (intel_ggtt_update_needs_vtd_wa(dev_priv)) { - ggtt->base.insert_entries = bxt_vtd_ggtt_insert_entries__BKL; - ggtt->base.insert_page = bxt_vtd_ggtt_insert_page__BKL; - if (ggtt->base.clear_range != nop_clear_range) - ggtt->base.clear_range = bxt_vtd_ggtt_clear_range__BKL; + ggtt->vm.insert_entries = bxt_vtd_ggtt_insert_entries__BKL; + ggtt->vm.insert_page = bxt_vtd_ggtt_insert_page__BKL; + if (ggtt->vm.clear_range != nop_clear_range) + ggtt->vm.clear_range = bxt_vtd_ggtt_clear_range__BKL; } ggtt->invalidate = gen6_ggtt_invalidate; + ggtt->vm.vma_ops.bind_vma = ggtt_bind_vma; + ggtt->vm.vma_ops.unbind_vma = ggtt_unbind_vma; + ggtt->vm.vma_ops.set_pages = ggtt_set_pages; + ggtt->vm.vma_ops.clear_pages = clear_pages; + setup_private_pat(dev_priv); return ggtt_probe_common(ggtt, size); @@ -3374,7 +3437,7 @@ static int gen8_gmch_probe(struct i915_ggtt *ggtt) static int gen6_gmch_probe(struct i915_ggtt *ggtt) { - struct drm_i915_private *dev_priv = ggtt->base.i915; + struct drm_i915_private *dev_priv = ggtt->vm.i915; struct pci_dev *pdev = dev_priv->drm.pdev; unsigned int size; u16 snb_gmch_ctl; @@ -3401,29 +3464,30 @@ static int gen6_gmch_probe(struct i915_ggtt *ggtt) pci_read_config_word(pdev, SNB_GMCH_CTRL, &snb_gmch_ctl); size = gen6_get_total_gtt_size(snb_gmch_ctl); - ggtt->base.total = (size / sizeof(gen6_pte_t)) << PAGE_SHIFT; + ggtt->vm.total = (size / sizeof(gen6_pte_t)) << PAGE_SHIFT; - ggtt->base.clear_range = gen6_ggtt_clear_range; - ggtt->base.insert_page = gen6_ggtt_insert_page; - ggtt->base.insert_entries = gen6_ggtt_insert_entries; - ggtt->base.bind_vma = ggtt_bind_vma; - ggtt->base.unbind_vma = ggtt_unbind_vma; - ggtt->base.set_pages = ggtt_set_pages; - ggtt->base.clear_pages = clear_pages; - ggtt->base.cleanup = gen6_gmch_remove; + ggtt->vm.clear_range = gen6_ggtt_clear_range; + ggtt->vm.insert_page = gen6_ggtt_insert_page; + ggtt->vm.insert_entries = gen6_ggtt_insert_entries; + ggtt->vm.cleanup = gen6_gmch_remove; ggtt->invalidate = gen6_ggtt_invalidate; if (HAS_EDRAM(dev_priv)) - ggtt->base.pte_encode = iris_pte_encode; + ggtt->vm.pte_encode = iris_pte_encode; else if (IS_HASWELL(dev_priv)) - ggtt->base.pte_encode = hsw_pte_encode; + ggtt->vm.pte_encode = hsw_pte_encode; else if (IS_VALLEYVIEW(dev_priv)) - ggtt->base.pte_encode = byt_pte_encode; + ggtt->vm.pte_encode = byt_pte_encode; else if (INTEL_GEN(dev_priv) >= 7) - ggtt->base.pte_encode = ivb_pte_encode; + ggtt->vm.pte_encode = ivb_pte_encode; else - ggtt->base.pte_encode = snb_pte_encode; + ggtt->vm.pte_encode = snb_pte_encode; + + ggtt->vm.vma_ops.bind_vma = ggtt_bind_vma; + ggtt->vm.vma_ops.unbind_vma = ggtt_unbind_vma; + ggtt->vm.vma_ops.set_pages = ggtt_set_pages; + ggtt->vm.vma_ops.clear_pages = clear_pages; return ggtt_probe_common(ggtt, size); } @@ -3435,7 +3499,7 @@ static void i915_gmch_remove(struct i915_address_space *vm) static int i915_gmch_probe(struct i915_ggtt *ggtt) { - struct drm_i915_private *dev_priv = ggtt->base.i915; + struct drm_i915_private *dev_priv = ggtt->vm.i915; phys_addr_t gmadr_base; int ret; @@ -3445,26 +3509,25 @@ static int i915_gmch_probe(struct i915_ggtt *ggtt) return -EIO; } - intel_gtt_get(&ggtt->base.total, - &gmadr_base, - &ggtt->mappable_end); + intel_gtt_get(&ggtt->vm.total, &gmadr_base, &ggtt->mappable_end); ggtt->gmadr = (struct resource) DEFINE_RES_MEM(gmadr_base, ggtt->mappable_end); ggtt->do_idle_maps = needs_idle_maps(dev_priv); - ggtt->base.insert_page = i915_ggtt_insert_page; - ggtt->base.insert_entries = i915_ggtt_insert_entries; - ggtt->base.clear_range = i915_ggtt_clear_range; - ggtt->base.bind_vma = ggtt_bind_vma; - ggtt->base.unbind_vma = ggtt_unbind_vma; - ggtt->base.set_pages = ggtt_set_pages; - ggtt->base.clear_pages = clear_pages; - ggtt->base.cleanup = i915_gmch_remove; + ggtt->vm.insert_page = i915_ggtt_insert_page; + ggtt->vm.insert_entries = i915_ggtt_insert_entries; + ggtt->vm.clear_range = i915_ggtt_clear_range; + ggtt->vm.cleanup = i915_gmch_remove; ggtt->invalidate = gmch_ggtt_invalidate; + ggtt->vm.vma_ops.bind_vma = ggtt_bind_vma; + ggtt->vm.vma_ops.unbind_vma = ggtt_unbind_vma; + ggtt->vm.vma_ops.set_pages = ggtt_set_pages; + ggtt->vm.vma_ops.clear_pages = clear_pages; + if (unlikely(ggtt->do_idle_maps)) DRM_INFO("applying Ironlake quirks for intel_iommu\n"); @@ -3480,8 +3543,8 @@ int i915_ggtt_probe_hw(struct drm_i915_private *dev_priv) struct i915_ggtt *ggtt = &dev_priv->ggtt; int ret; - ggtt->base.i915 = dev_priv; - ggtt->base.dma = &dev_priv->drm.pdev->dev; + ggtt->vm.i915 = dev_priv; + ggtt->vm.dma = &dev_priv->drm.pdev->dev; if (INTEL_GEN(dev_priv) <= 5) ret = i915_gmch_probe(ggtt); @@ -3498,27 +3561,29 @@ int i915_ggtt_probe_hw(struct drm_i915_private *dev_priv) * restriction! */ if (USES_GUC(dev_priv)) { - ggtt->base.total = min_t(u64, ggtt->base.total, GUC_GGTT_TOP); - ggtt->mappable_end = min_t(u64, ggtt->mappable_end, ggtt->base.total); + ggtt->vm.total = min_t(u64, ggtt->vm.total, GUC_GGTT_TOP); + ggtt->mappable_end = + min_t(u64, ggtt->mappable_end, ggtt->vm.total); } - if ((ggtt->base.total - 1) >> 32) { + if ((ggtt->vm.total - 1) >> 32) { DRM_ERROR("We never expected a Global GTT with more than 32bits" " of address space! Found %lldM!\n", - ggtt->base.total >> 20); - ggtt->base.total = 1ULL << 32; - ggtt->mappable_end = min_t(u64, ggtt->mappable_end, ggtt->base.total); + ggtt->vm.total >> 20); + ggtt->vm.total = 1ULL << 32; + ggtt->mappable_end = + min_t(u64, ggtt->mappable_end, ggtt->vm.total); } - if (ggtt->mappable_end > ggtt->base.total) { + if (ggtt->mappable_end > ggtt->vm.total) { DRM_ERROR("mappable aperture extends past end of GGTT," " aperture=%pa, total=%llx\n", - &ggtt->mappable_end, ggtt->base.total); - ggtt->mappable_end = ggtt->base.total; + &ggtt->mappable_end, ggtt->vm.total); + ggtt->mappable_end = ggtt->vm.total; } /* GMADR is the PCI mmio aperture into the global GTT. */ - DRM_DEBUG_DRIVER("GGTT size = %lluM\n", ggtt->base.total >> 20); + DRM_DEBUG_DRIVER("GGTT size = %lluM\n", ggtt->vm.total >> 20); DRM_DEBUG_DRIVER("GMADR size = %lluM\n", (u64)ggtt->mappable_end >> 20); DRM_DEBUG_DRIVER("DSM size = %lluM\n", (u64)resource_size(&intel_graphics_stolen_res) >> 20); @@ -3537,7 +3602,7 @@ int i915_ggtt_init_hw(struct drm_i915_private *dev_priv) struct i915_ggtt *ggtt = &dev_priv->ggtt; int ret; - INIT_LIST_HEAD(&dev_priv->vm_list); + stash_init(&dev_priv->mm.wc_stash); /* Note that we use page colouring to enforce a guard page at the * end of the address space. This is required as the CS may prefetch @@ -3545,9 +3610,13 @@ int i915_ggtt_init_hw(struct drm_i915_private *dev_priv) * and beyond the end of the GTT if we do not provide a guard. */ mutex_lock(&dev_priv->drm.struct_mutex); - i915_address_space_init(&ggtt->base, dev_priv, "[global]"); + i915_address_space_init(&ggtt->vm, dev_priv); + + /* Only VLV supports read-only GGTT mappings */ + ggtt->vm.has_read_only = IS_VALLEYVIEW(dev_priv); + if (!HAS_LLC(dev_priv) && !USES_PPGTT(dev_priv)) - ggtt->base.mm.color_adjust = i915_gtt_color_adjust; + ggtt->vm.mm.color_adjust = i915_gtt_color_adjust; mutex_unlock(&dev_priv->drm.struct_mutex); if (!io_mapping_init_wc(&dev_priv->ggtt.iomap, @@ -3570,7 +3639,7 @@ int i915_ggtt_init_hw(struct drm_i915_private *dev_priv) return 0; out_gtt_cleanup: - ggtt->base.cleanup(&ggtt->base); + ggtt->vm.cleanup(&ggtt->vm); return ret; } @@ -3604,34 +3673,35 @@ void i915_ggtt_disable_guc(struct drm_i915_private *i915) void i915_gem_restore_gtt_mappings(struct drm_i915_private *dev_priv) { struct i915_ggtt *ggtt = &dev_priv->ggtt; - struct drm_i915_gem_object *obj, *on; + struct i915_vma *vma, *vn; i915_check_and_clear_faults(dev_priv); /* First fill our portion of the GTT with scratch pages */ - ggtt->base.clear_range(&ggtt->base, 0, ggtt->base.total); + ggtt->vm.clear_range(&ggtt->vm, 0, ggtt->vm.total); - ggtt->base.closed = true; /* skip rewriting PTE on VMA unbind */ + ggtt->vm.closed = true; /* skip rewriting PTE on VMA unbind */ /* clflush objects bound into the GGTT and rebind them. */ - list_for_each_entry_safe(obj, on, &dev_priv->mm.bound_list, mm.link) { - bool ggtt_bound = false; - struct i915_vma *vma; + GEM_BUG_ON(!list_empty(&ggtt->vm.active_list)); + list_for_each_entry_safe(vma, vn, &ggtt->vm.inactive_list, vm_link) { + struct drm_i915_gem_object *obj = vma->obj; - for_each_ggtt_vma(vma, obj) { - if (!i915_vma_unbind(vma)) - continue; + if (!(vma->flags & I915_VMA_GLOBAL_BIND)) + continue; - WARN_ON(i915_vma_bind(vma, obj->cache_level, - PIN_UPDATE)); - ggtt_bound = true; - } + if (!i915_vma_unbind(vma)) + continue; - if (ggtt_bound) + WARN_ON(i915_vma_bind(vma, + obj ? obj->cache_level : 0, + PIN_UPDATE)); + if (obj) WARN_ON(i915_gem_object_set_to_gtt_domain(obj, false)); } - ggtt->base.closed = false; + ggtt->vm.closed = false; + i915_ggtt_invalidate(dev_priv); if (INTEL_GEN(dev_priv) >= 8) { struct intel_ppat *ppat = &dev_priv->ppat; @@ -3640,23 +3710,6 @@ void i915_gem_restore_gtt_mappings(struct drm_i915_private *dev_priv) dev_priv->ppat.update_hw(dev_priv); return; } - - if (USES_PPGTT(dev_priv)) { - struct i915_address_space *vm; - - list_for_each_entry(vm, &dev_priv->vm_list, global_link) { - struct i915_hw_ppgtt *ppgtt; - - if (i915_is_ggtt(vm)) - ppgtt = dev_priv->mm.aliasing_ppgtt; - else - ppgtt = i915_vm_to_ppgtt(vm); - - gen6_write_page_range(ppgtt, 0, ppgtt->base.total); - } - } - - i915_ggtt_invalidate(dev_priv); } static struct scatterlist * @@ -3811,6 +3864,9 @@ i915_get_ggtt_vma_pages(struct i915_vma *vma) GEM_BUG_ON(!i915_gem_object_has_pinned_pages(vma->obj)); switch (vma->ggtt_view.type) { + default: + GEM_BUG_ON(vma->ggtt_view.type); + /* fall through */ case I915_GGTT_VIEW_NORMAL: vma->pages = vma->obj->mm.pages; return 0; @@ -3823,11 +3879,6 @@ i915_get_ggtt_vma_pages(struct i915_vma *vma) case I915_GGTT_VIEW_PARTIAL: vma->pages = intel_partial_pages(&vma->ggtt_view, vma->obj); break; - - default: - WARN_ONCE(1, "GGTT view %u not implemented!\n", - vma->ggtt_view.type); - return -EINVAL; } ret = 0; @@ -3876,7 +3927,7 @@ int i915_gem_gtt_reserve(struct i915_address_space *vm, GEM_BUG_ON(!IS_ALIGNED(size, I915_GTT_PAGE_SIZE)); GEM_BUG_ON(!IS_ALIGNED(offset, I915_GTT_MIN_ALIGNMENT)); GEM_BUG_ON(range_overflows(offset, size, vm->total)); - GEM_BUG_ON(vm == &vm->i915->mm.aliasing_ppgtt->base); + GEM_BUG_ON(vm == &vm->i915->mm.aliasing_ppgtt->vm); GEM_BUG_ON(drm_mm_node_allocated(node)); node->size = size; @@ -3973,7 +4024,7 @@ int i915_gem_gtt_insert(struct i915_address_space *vm, GEM_BUG_ON(start >= end); GEM_BUG_ON(start > 0 && !IS_ALIGNED(start, I915_GTT_PAGE_SIZE)); GEM_BUG_ON(end < U64_MAX && !IS_ALIGNED(end, I915_GTT_PAGE_SIZE)); - GEM_BUG_ON(vm == &vm->i915->mm.aliasing_ppgtt->base); + GEM_BUG_ON(vm == &vm->i915->mm.aliasing_ppgtt->vm); GEM_BUG_ON(drm_mm_node_allocated(node)); if (unlikely(range_overflows(start, size, end))) @@ -3984,7 +4035,7 @@ int i915_gem_gtt_insert(struct i915_address_space *vm, mode = DRM_MM_INSERT_BEST; if (flags & PIN_HIGH) - mode = DRM_MM_INSERT_HIGH; + mode = DRM_MM_INSERT_HIGHEST; if (flags & PIN_MAPPABLE) mode = DRM_MM_INSERT_LOW; @@ -4004,6 +4055,15 @@ int i915_gem_gtt_insert(struct i915_address_space *vm, if (err != -ENOSPC) return err; + if (mode & DRM_MM_INSERT_ONCE) { + err = drm_mm_insert_node_in_range(&vm->mm, node, + size, alignment, color, + start, end, + DRM_MM_INSERT_BEST); + if (err != -ENOSPC) + return err; + } + if (flags & PIN_NOEVICT) return -ENOSPC; |
