In preparation for refactoring the free/clear/alloc, first move the code
around so that we can avoid forward declarations in the next set of
patches.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_gem_gtt.c | 673 ++++++++++++++--------------
1 file changed, 337 insertions(+), 336 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 1fa93f56792e..da4db76ce054 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -831,6 +831,104 @@ static void mark_tlbs_dirty(struct i915_ppgtt *ppgtt)
ppgtt->pd_dirty_engines = ALL_ENGINES;
}
+static int gen8_ppgtt_notify_vgt(struct i915_ppgtt *ppgtt, bool create)
+{
+ struct i915_address_space *vm = &ppgtt->vm;
+ struct drm_i915_private *dev_priv = vm->i915;
+ enum vgt_g2v_type msg;
+ int i;
+
+ if (create)
+ atomic_inc(px_used(ppgtt->pd)); /* never remove */
+ else
+ atomic_dec(px_used(ppgtt->pd));
+
+ if (i915_vm_is_4lvl(vm)) {
+ const u64 daddr = px_dma(ppgtt->pd);
+
+ I915_WRITE(vgtif_reg(pdp[0].lo), lower_32_bits(daddr));
+ I915_WRITE(vgtif_reg(pdp[0].hi), upper_32_bits(daddr));
+
+ msg = (create ? VGT_G2V_PPGTT_L4_PAGE_TABLE_CREATE :
+ VGT_G2V_PPGTT_L4_PAGE_TABLE_DESTROY);
+ } else {
+ for (i = 0; i < GEN8_3LVL_PDPES; i++) {
+ const u64 daddr = i915_page_dir_dma_addr(ppgtt, i);
+
+ I915_WRITE(vgtif_reg(pdp[i].lo), lower_32_bits(daddr));
+ I915_WRITE(vgtif_reg(pdp[i].hi), upper_32_bits(daddr));
+ }
+
+ msg = (create ? VGT_G2V_PPGTT_L3_PAGE_TABLE_CREATE :
+ VGT_G2V_PPGTT_L3_PAGE_TABLE_DESTROY);
+ }
+
+ I915_WRITE(vgtif_reg(g2v_notify), msg);
+
+ return 0;
+}
+
+static void gen8_free_page_tables(struct i915_address_space *vm,
+ struct i915_page_directory *pd)
+{
+ int i;
+
+ for (i = 0; i < I915_PDES; i++) {
+ if (pd->entry[i] != &vm->scratch_pt)
+ free_pd(vm, pd->entry[i]);
+ }
+}
+
+static void gen8_ppgtt_cleanup_3lvl(struct i915_address_space *vm,
+ struct i915_page_directory *pdp)
+{
+ const unsigned int pdpes = i915_pdpes_per_pdp(vm);
+ int i;
+
+ for (i = 0; i < pdpes; i++) {
+ if (pdp->entry[i] == &vm->scratch_pd)
+ continue;
+
+ gen8_free_page_tables(vm, pdp->entry[i]);
+ free_pd(vm, pdp->entry[i]);
+ }
+
+ free_px(vm, pdp);
+}
+
+static void gen8_ppgtt_cleanup_4lvl(struct i915_ppgtt *ppgtt)
+{
+ struct i915_page_directory * const pml4 = ppgtt->pd;
+ int i;
+
+ for (i = 0; i < GEN8_PML4ES_PER_PML4; i++) {
+ struct i915_page_directory *pdp = i915_pdp_entry(pml4, i);
+
+ if (px_base(pdp) == &ppgtt->vm.scratch_pdp)
+ continue;
+
+ gen8_ppgtt_cleanup_3lvl(&ppgtt->vm, pdp);
+ }
+
+ free_px(&ppgtt->vm, pml4);
+}
+
+static void gen8_ppgtt_cleanup(struct i915_address_space *vm)
+{
+ struct drm_i915_private *i915 = vm->i915;
+ struct i915_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
+
+ if (intel_vgpu_active(i915))
+ gen8_ppgtt_notify_vgt(ppgtt, false);
+
+ if (i915_vm_is_4lvl(vm))
+ gen8_ppgtt_cleanup_4lvl(ppgtt);
+ else
+ gen8_ppgtt_cleanup_3lvl(&ppgtt->vm, ppgtt->pd);
+
+ free_scratch(vm);
+}
+
/* Removes entries from a single page table, releasing it if it's empty.
* Caller can use the return value to update higher-level entries.
*/
@@ -917,95 +1015,265 @@ static void gen8_ppgtt_clear_4lvl(struct i915_address_space *vm,
}
}
-static inline struct sgt_dma {
- struct scatterlist *sg;
- dma_addr_t dma, max;
-} sgt_dma(struct i915_vma *vma) {
- struct scatterlist *sg = vma->pages->sgl;
- dma_addr_t addr = sg_dma_address(sg);
- return (struct sgt_dma) { sg, addr, addr + sg->length };
-}
-
-struct gen8_insert_pte {
- u16 pml4e;
- u16 pdpe;
- u16 pde;
- u16 pte;
-};
-static __always_inline struct gen8_insert_pte gen8_insert_pte(u64 start)
+static int gen8_ppgtt_alloc_pd(struct i915_address_space *vm,
+ struct i915_page_directory *pd,
+ u64 start, u64 length)
{
- return (struct gen8_insert_pte) {
- gen8_pml4e_index(start),
- gen8_pdpe_index(start),
- gen8_pde_index(start),
- gen8_pte_index(start),
- };
-}
+ struct i915_page_table *pt, *alloc = NULL;
+ u64 from = start;
+ unsigned int pde;
+ int ret = 0;
-static __always_inline bool
-gen8_ppgtt_insert_pte_entries(struct i915_ppgtt *ppgtt,
- struct i915_page_directory *pdp,
- struct sgt_dma *iter,
- struct gen8_insert_pte *idx,
- 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, flags);
- gen8_pte_t *vaddr;
- bool ret;
+ spin_lock(&pd->lock);
+ gen8_for_each_pde(pt, pd, start, length, pde) {
+ const int count = gen8_pte_count(start, length);
- GEM_BUG_ON(idx->pdpe >= i915_pdpes_per_pdp(&ppgtt->vm));
- pd = i915_pd_entry(pdp, idx->pdpe);
- vaddr = kmap_atomic_px(i915_pt_entry(pd, idx->pde));
- do {
- vaddr[idx->pte] = pte_encode | iter->dma;
+ if (px_base(pt) == &vm->scratch_pt) {
+ spin_unlock(&pd->lock);
- iter->dma += I915_GTT_PAGE_SIZE;
- if (iter->dma >= iter->max) {
- iter->sg = __sg_next(iter->sg);
- if (!iter->sg) {
- ret = false;
- break;
+ pt = fetch_and_zero(&alloc);
+ if (!pt)
+ pt = alloc_pt(vm);
+ if (IS_ERR(pt)) {
+ ret = PTR_ERR(pt);
+ goto unwind;
}
- iter->dma = sg_dma_address(iter->sg);
- iter->max = iter->dma + iter->sg->length;
+ if (count < GEN8_PTES || intel_vgpu_active(vm->i915))
+ fill_px(pt, vm->scratch_pte);
+
+ spin_lock(&pd->lock);
+ if (pd->entry[pde] == &vm->scratch_pt) {
+ set_pd_entry(pd, pde, pt);
+ } else {
+ alloc = pt;
+ pt = pd->entry[pde];
+ }
}
- if (++idx->pte == GEN8_PTES) {
- idx->pte = 0;
+ atomic_add(count, &pt->used);
+ }
+ spin_unlock(&pd->lock);
+ goto out;
- if (++idx->pde == I915_PDES) {
- idx->pde = 0;
+unwind:
+ gen8_ppgtt_clear_pd(vm, pd, from, start - from);
+out:
+ if (alloc)
+ free_px(vm, alloc);
+ return ret;
+}
- /* Limited by sg length for 3lvl */
- if (++idx->pdpe == GEN8_PML4ES_PER_PML4) {
- idx->pdpe = 0;
- ret = true;
- break;
- }
+static int gen8_ppgtt_alloc_pdp(struct i915_address_space *vm,
+ struct i915_page_directory *pdp,
+ u64 start, u64 length)
+{
+ struct i915_page_directory *pd, *alloc = NULL;
+ u64 from = start;
+ unsigned int pdpe;
+ int ret = 0;
- GEM_BUG_ON(idx->pdpe >= i915_pdpes_per_pdp(&ppgtt->vm));
- pd = pdp->entry[idx->pdpe];
+ spin_lock(&pdp->lock);
+ gen8_for_each_pdpe(pd, pdp, start, length, pdpe) {
+ if (px_base(pd) == &vm->scratch_pd) {
+ spin_unlock(&pdp->lock);
+
+ pd = fetch_and_zero(&alloc);
+ if (!pd)
+ pd = alloc_pd(vm);
+ if (IS_ERR(pd)) {
+ ret = PTR_ERR(pd);
+ goto unwind;
}
- kunmap_atomic(vaddr);
- vaddr = kmap_atomic_px(i915_pt_entry(pd, idx->pde));
+ init_pd(pd, &vm->scratch_pt);
+
+ spin_lock(&pdp->lock);
+ if (pdp->entry[pdpe] == &vm->scratch_pd) {
+ set_pd_entry(pdp, pdpe, pd);
+ } else {
+ alloc = pd;
+ pd = pdp->entry[pdpe];
+ }
}
- } while (1);
- kunmap_atomic(vaddr);
+ atomic_inc(px_used(pd));
+ spin_unlock(&pdp->lock);
+
+ ret = gen8_ppgtt_alloc_pd(vm, pd, start, length);
+ if (unlikely(ret))
+ goto unwind_pd;
+
+ spin_lock(&pdp->lock);
+ atomic_dec(px_used(pd));
+ }
+ spin_unlock(&pdp->lock);
+ goto out;
+unwind_pd:
+ if (release_pd_entry(pdp, pdpe, &pd->pt, &vm->scratch_pd))
+ free_px(vm, pd);
+unwind:
+ gen8_ppgtt_clear_pdp(vm, pdp, from, start - from);
+out:
+ if (alloc)
+ free_px(vm, alloc);
return ret;
}
-static void gen8_ppgtt_insert_3lvl(struct i915_address_space *vm,
- struct i915_vma *vma,
- enum i915_cache_level cache_level,
- u32 flags)
+static int gen8_ppgtt_alloc_3lvl(struct i915_address_space *vm,
+ u64 start, u64 length)
{
- struct i915_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
+ return gen8_ppgtt_alloc_pdp(vm,
+ i915_vm_to_ppgtt(vm)->pd, start, length);
+}
+
+static int gen8_ppgtt_alloc_4lvl(struct i915_address_space *vm,
+ u64 start, u64 length)
+{
+ struct i915_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
+ struct i915_page_directory * const pml4 = ppgtt->pd;
+ struct i915_page_directory *pdp, *alloc = NULL;
+ u64 from = start;
+ int ret = 0;
+ u32 pml4e;
+
+ spin_lock(&pml4->lock);
+ gen8_for_each_pml4e(pdp, pml4, start, length, pml4e) {
+ if (px_base(pdp) == &vm->scratch_pdp) {
+ spin_unlock(&pml4->lock);
+
+ pdp = fetch_and_zero(&alloc);
+ if (!pdp)
+ pdp = alloc_pd(vm);
+ if (IS_ERR(pdp)) {
+ ret = PTR_ERR(pdp);
+ goto unwind;
+ }
+
+ init_pd(pdp, &vm->scratch_pd);
+
+ spin_lock(&pml4->lock);
+ if (pml4->entry[pml4e] == &vm->scratch_pdp) {
+ set_pd_entry(pml4, pml4e, pdp);
+ } else {
+ alloc = pdp;
+ pdp = pml4->entry[pml4e];
+ }
+ }
+ atomic_inc(px_used(pdp));
+ spin_unlock(&pml4->lock);
+
+ ret = gen8_ppgtt_alloc_pdp(vm, pdp, start, length);
+ if (unlikely(ret))
+ goto unwind_pdp;
+
+ spin_lock(&pml4->lock);
+ atomic_dec(px_used(pdp));
+ }
+ spin_unlock(&pml4->lock);
+ goto out;
+
+unwind_pdp:
+ if (release_pd_entry(pml4, pml4e, &pdp->pt, &vm->scratch_pdp))
+ free_px(vm, pdp);
+unwind:
+ gen8_ppgtt_clear_4lvl(vm, from, start - from);
+out:
+ if (alloc)
+ free_px(vm, alloc);
+ return ret;
+}
+
+static inline struct sgt_dma {
+ struct scatterlist *sg;
+ dma_addr_t dma, max;
+} sgt_dma(struct i915_vma *vma) {
+ struct scatterlist *sg = vma->pages->sgl;
+ dma_addr_t addr = sg_dma_address(sg);
+ return (struct sgt_dma) { sg, addr, addr + sg->length };
+}
+
+struct gen8_insert_pte {
+ u16 pml4e;
+ u16 pdpe;
+ u16 pde;
+ u16 pte;
+};
+
+static __always_inline struct gen8_insert_pte gen8_insert_pte(u64 start)
+{
+ return (struct gen8_insert_pte) {
+ gen8_pml4e_index(start),
+ gen8_pdpe_index(start),
+ gen8_pde_index(start),
+ gen8_pte_index(start),
+ };
+}
+
+static __always_inline bool
+gen8_ppgtt_insert_pte_entries(struct i915_ppgtt *ppgtt,
+ struct i915_page_directory *pdp,
+ struct sgt_dma *iter,
+ struct gen8_insert_pte *idx,
+ 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, flags);
+ gen8_pte_t *vaddr;
+ bool ret;
+
+ GEM_BUG_ON(idx->pdpe >= i915_pdpes_per_pdp(&ppgtt->vm));
+ pd = i915_pd_entry(pdp, idx->pdpe);
+ vaddr = kmap_atomic_px(i915_pt_entry(pd, idx->pde));
+ do {
+ vaddr[idx->pte] = pte_encode | iter->dma;
+
+ iter->dma += I915_GTT_PAGE_SIZE;
+ if (iter->dma >= iter->max) {
+ iter->sg = __sg_next(iter->sg);
+ if (!iter->sg) {
+ ret = false;
+ break;
+ }
+
+ iter->dma = sg_dma_address(iter->sg);
+ iter->max = iter->dma + iter->sg->length;
+ }
+
+ if (++idx->pte == GEN8_PTES) {
+ idx->pte = 0;
+
+ if (++idx->pde == I915_PDES) {
+ idx->pde = 0;
+
+ /* Limited by sg length for 3lvl */
+ if (++idx->pdpe == GEN8_PML4ES_PER_PML4) {
+ idx->pdpe = 0;
+ ret = true;
+ break;
+ }
+
+ GEM_BUG_ON(idx->pdpe >= i915_pdpes_per_pdp(&ppgtt->vm));
+ pd = pdp->entry[idx->pdpe];
+ }
+
+ kunmap_atomic(vaddr);
+ vaddr = kmap_atomic_px(i915_pt_entry(pd, idx->pde));
+ }
+ } while (1);
+ kunmap_atomic(vaddr);
+
+ return ret;
+}
+
+static void gen8_ppgtt_insert_3lvl(struct i915_address_space *vm,
+ struct i915_vma *vma,
+ enum i915_cache_level cache_level,
+ u32 flags)
+{
+ struct i915_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);
@@ -1161,17 +1429,6 @@ static void gen8_ppgtt_insert_4lvl(struct i915_address_space *vm,
}
}
-static void gen8_free_page_tables(struct i915_address_space *vm,
- struct i915_page_directory *pd)
-{
- int i;
-
- for (i = 0; i < I915_PDES; i++) {
- if (pd->entry[i] != &vm->scratch_pt)
- free_pd(vm, pd->entry[i]);
- }
-}
-
static int gen8_init_scratch(struct i915_address_space *vm)
{
int ret;
@@ -1239,262 +1496,6 @@ static int gen8_init_scratch(struct i915_address_space *vm)
return ret;
}
-static int gen8_ppgtt_notify_vgt(struct i915_ppgtt *ppgtt, bool create)
-{
- struct i915_address_space *vm = &ppgtt->vm;
- struct drm_i915_private *dev_priv = vm->i915;
- enum vgt_g2v_type msg;
- int i;
-
- if (create)
- atomic_inc(px_used(ppgtt->pd)); /* never remove */
- else
- atomic_dec(px_used(ppgtt->pd));
-
- if (i915_vm_is_4lvl(vm)) {
- const u64 daddr = px_dma(ppgtt->pd);
-
- I915_WRITE(vgtif_reg(pdp[0].lo), lower_32_bits(daddr));
- I915_WRITE(vgtif_reg(pdp[0].hi), upper_32_bits(daddr));
-
- msg = (create ? VGT_G2V_PPGTT_L4_PAGE_TABLE_CREATE :
- VGT_G2V_PPGTT_L4_PAGE_TABLE_DESTROY);
- } else {
- for (i = 0; i < GEN8_3LVL_PDPES; i++) {
- const u64 daddr = i915_page_dir_dma_addr(ppgtt, i);
-
- I915_WRITE(vgtif_reg(pdp[i].lo), lower_32_bits(daddr));
- I915_WRITE(vgtif_reg(pdp[i].hi), upper_32_bits(daddr));
- }
-
- msg = (create ? VGT_G2V_PPGTT_L3_PAGE_TABLE_CREATE :
- VGT_G2V_PPGTT_L3_PAGE_TABLE_DESTROY);
- }
-
- I915_WRITE(vgtif_reg(g2v_notify), msg);
-
- return 0;
-}
-
-static void gen8_ppgtt_cleanup_3lvl(struct i915_address_space *vm,
- struct i915_page_directory *pdp)
-{
- const unsigned int pdpes = i915_pdpes_per_pdp(vm);
- int i;
-
- for (i = 0; i < pdpes; i++) {
- if (pdp->entry[i] == &vm->scratch_pd)
- continue;
-
- gen8_free_page_tables(vm, pdp->entry[i]);
- free_pd(vm, pdp->entry[i]);
- }
-
- free_px(vm, pdp);
-}
-
-static void gen8_ppgtt_cleanup_4lvl(struct i915_ppgtt *ppgtt)
-{
- struct i915_page_directory * const pml4 = ppgtt->pd;
- int i;
-
- for (i = 0; i < GEN8_PML4ES_PER_PML4; i++) {
- struct i915_page_directory *pdp = i915_pdp_entry(pml4, i);
-
- if (px_base(pdp) == &ppgtt->vm.scratch_pdp)
- continue;
-
- gen8_ppgtt_cleanup_3lvl(&ppgtt->vm, pdp);
- }
-
- free_px(&ppgtt->vm, pml4);
-}
-
-static void gen8_ppgtt_cleanup(struct i915_address_space *vm)
-{
- struct drm_i915_private *i915 = vm->i915;
- struct i915_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
-
- if (intel_vgpu_active(i915))
- gen8_ppgtt_notify_vgt(ppgtt, false);
-
- if (i915_vm_is_4lvl(vm))
- gen8_ppgtt_cleanup_4lvl(ppgtt);
- else
- gen8_ppgtt_cleanup_3lvl(&ppgtt->vm, ppgtt->pd);
-
- free_scratch(vm);
-}
-
-static int gen8_ppgtt_alloc_pd(struct i915_address_space *vm,
- struct i915_page_directory *pd,
- u64 start, u64 length)
-{
- struct i915_page_table *pt, *alloc = NULL;
- u64 from = start;
- unsigned int pde;
- int ret = 0;
-
- spin_lock(&pd->lock);
- gen8_for_each_pde(pt, pd, start, length, pde) {
- const int count = gen8_pte_count(start, length);
-
- if (px_base(pt) == &vm->scratch_pt) {
- spin_unlock(&pd->lock);
-
- pt = fetch_and_zero(&alloc);
- if (!pt)
- pt = alloc_pt(vm);
- if (IS_ERR(pt)) {
- ret = PTR_ERR(pt);
- goto unwind;
- }
-
- if (count < GEN8_PTES || intel_vgpu_active(vm->i915))
- fill_px(pt, vm->scratch_pte);
-
- spin_lock(&pd->lock);
- if (pd->entry[pde] == &vm->scratch_pt) {
- set_pd_entry(pd, pde, pt);
- } else {
- alloc = pt;
- pt = pd->entry[pde];
- }
- }
-
- atomic_add(count, &pt->used);
- }
- spin_unlock(&pd->lock);
- goto out;
-
-unwind:
- gen8_ppgtt_clear_pd(vm, pd, from, start - from);
-out:
- if (alloc)
- free_px(vm, alloc);
- return ret;
-}
-
-static int gen8_ppgtt_alloc_pdp(struct i915_address_space *vm,
- struct i915_page_directory *pdp,
- u64 start, u64 length)
-{
- struct i915_page_directory *pd, *alloc = NULL;
- u64 from = start;
- unsigned int pdpe;
- int ret = 0;
-
- spin_lock(&pdp->lock);
- gen8_for_each_pdpe(pd, pdp, start, length, pdpe) {
- if (px_base(pd) == &vm->scratch_pd) {
- spin_unlock(&pdp->lock);
-
- pd = fetch_and_zero(&alloc);
- if (!pd)
- pd = alloc_pd(vm);
- if (IS_ERR(pd)) {
- ret = PTR_ERR(pd);
- goto unwind;
- }
-
- init_pd(pd, &vm->scratch_pt);
-
- spin_lock(&pdp->lock);
- if (pdp->entry[pdpe] == &vm->scratch_pd) {
- set_pd_entry(pdp, pdpe, pd);
- } else {
- alloc = pd;
- pd = pdp->entry[pdpe];
- }
- }
- atomic_inc(px_used(pd));
- spin_unlock(&pdp->lock);
-
- ret = gen8_ppgtt_alloc_pd(vm, pd, start, length);
- if (unlikely(ret))
- goto unwind_pd;
-
- spin_lock(&pdp->lock);
- atomic_dec(px_used(pd));
- }
- spin_unlock(&pdp->lock);
- goto out;
-
-unwind_pd:
- if (release_pd_entry(pdp, pdpe, &pd->pt, &vm->scratch_pd))
- free_px(vm, pd);
-unwind:
- gen8_ppgtt_clear_pdp(vm, pdp, from, start - from);
-out:
- if (alloc)
- free_px(vm, alloc);
- return ret;
-}
-
-static int gen8_ppgtt_alloc_3lvl(struct i915_address_space *vm,
- u64 start, u64 length)
-{
- return gen8_ppgtt_alloc_pdp(vm,
- i915_vm_to_ppgtt(vm)->pd, start, length);
-}
-
-static int gen8_ppgtt_alloc_4lvl(struct i915_address_space *vm,
- u64 start, u64 length)
-{
- struct i915_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
- struct i915_page_directory * const pml4 = ppgtt->pd;
- struct i915_page_directory *pdp, *alloc = NULL;
- u64 from = start;
- int ret = 0;
- u32 pml4e;
-
- spin_lock(&pml4->lock);
- gen8_for_each_pml4e(pdp, pml4, start, length, pml4e) {
- if (px_base(pdp) == &vm->scratch_pdp) {
- spin_unlock(&pml4->lock);
-
- pdp = fetch_and_zero(&alloc);
- if (!pdp)
- pdp = alloc_pd(vm);
- if (IS_ERR(pdp)) {
- ret = PTR_ERR(pdp);
- goto unwind;
- }
-
- init_pd(pdp, &vm->scratch_pd);
-
- spin_lock(&pml4->lock);
- if (pml4->entry[pml4e] == &vm->scratch_pdp) {
- set_pd_entry(pml4, pml4e, pdp);
- } else {
- alloc = pdp;
- pdp = pml4->entry[pml4e];
- }
- }
- atomic_inc(px_used(pdp));
- spin_unlock(&pml4->lock);
-
- ret = gen8_ppgtt_alloc_pdp(vm, pdp, start, length);
- if (unlikely(ret))
- goto unwind_pdp;
-
- spin_lock(&pml4->lock);
- atomic_dec(px_used(pdp));
- }
- spin_unlock(&pml4->lock);
- goto out;
-
-unwind_pdp:
- if (release_pd_entry(pml4, pml4e, &pdp->pt, &vm->scratch_pdp))
- free_px(vm, pdp);
-unwind:
- gen8_ppgtt_clear_4lvl(vm, from, start - from);
-out:
- if (alloc)
- free_px(vm, alloc);
- return ret;
-}
-
static int gen8_preallocate_top_level_pdp(struct i915_ppgtt *ppgtt)
{
struct i915_address_space *vm = &ppgtt->vm;
--
2.20.1
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