[Intel-gfx] [PATCH v6 03/32] drm/i915: Create page table allocators
Paulo Zanoni
przanoni at gmail.com
Mon Mar 2 10:57:39 PST 2015
2015-02-25 10:34 GMT-03:00 Mika Kuoppala <mika.kuoppala at linux.intel.com>:
> Michel Thierry <michel.thierry at intel.com> writes:
>
>> From: Ben Widawsky <benjamin.widawsky at intel.com>
>>
>> As we move toward dynamic page table allocation, it becomes much easier
>> to manage our data structures if break do things less coarsely by
>> breaking up all of our actions into individual tasks. This makes the
>> code easier to write, read, and verify.
QA reported a regression caused by this patch. BSW doesn't boot anymore.
https://bugs.freedesktop.org/show_bug.cgi?id=89350
>>
>> Aside from the dissection of the allocation functions, the patch
>> statically allocates the page table structures without a page directory.
>> This remains the same for all platforms,
>>
>> The patch itself should not have much functional difference. The primary
>> noticeable difference is the fact that page tables are no longer
>> allocated, but rather statically declared as part of the page directory.
>> This has non-zero overhead, but things gain additional complexity as a
>> result.
>>
>> This patch exists for a few reasons:
>> 1. Splitting out the functions allows easily combining GEN6 and GEN8
>> code. Page tables have no difference based on GEN8. As we'll see in a
>> future patch when we add the DMA mappings to the allocations, it
>> requires only one small change to make work, and error handling should
>> just fall into place.
>>
>> 2. Unless we always want to allocate all page tables under a given PDE,
>> we'll have to eventually break this up into an array of pointers (or
>> pointer to pointer).
>>
>> 3. Having the discrete functions is easier to review, and understand.
>> All allocations and frees now take place in just a couple of locations.
>> Reviewing, and catching leaks should be easy.
>>
>> 4. Less important: the GFP flags are confined to one location, which
>> makes playing around with such things trivial.
>>
>> v2: Updated commit message to explain why this patch exists
>>
>> v3: For lrc, s/pdp.page_directory[i].daddr/pdp.page_directory[i]->daddr/
>>
>> v4: Renamed free_pt/pd_single functions to unmap_and_free_pt/pd (Daniel)
>>
>> v5: Added additional safety checks in gen8 clear/free/unmap.
>>
>> v6: Use WARN_ON and return -EINVAL in alloc_pt_range (Mika).
>>
>> v7: Make err_out loop symmetrical to the way we allocate in
>> alloc_pt_range. Also s/page_tables/page_table and correct commit
>> message (Mika)
>>
>> Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
>> Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
>> Signed-off-by: Michel Thierry <michel.thierry at intel.com> (v3+)
>
> Reviewed-by: Mika Kuoppala <mika.kuoppala at intel.com>
>
>> ---
>> drivers/gpu/drm/i915/i915_gem_gtt.c | 254 ++++++++++++++++++++++++------------
>> drivers/gpu/drm/i915/i915_gem_gtt.h | 4 +-
>> drivers/gpu/drm/i915/intel_lrc.c | 16 +--
>> 3 files changed, 178 insertions(+), 96 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
>> index ab6f1d4..81c1dba 100644
>> --- a/drivers/gpu/drm/i915/i915_gem_gtt.c
>> +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
>> @@ -279,6 +279,98 @@ static gen6_gtt_pte_t iris_pte_encode(dma_addr_t addr,
>> return pte;
>> }
>>
>> +static void unmap_and_free_pt(struct i915_page_table_entry *pt)
>> +{
>> + if (WARN_ON(!pt->page))
>> + return;
>> + __free_page(pt->page);
>> + kfree(pt);
>> +}
>> +
>> +static struct i915_page_table_entry *alloc_pt_single(void)
>> +{
>> + struct i915_page_table_entry *pt;
>> +
>> + pt = kzalloc(sizeof(*pt), GFP_KERNEL);
>> + if (!pt)
>> + return ERR_PTR(-ENOMEM);
>> +
>> + pt->page = alloc_page(GFP_KERNEL | __GFP_ZERO);
>> + if (!pt->page) {
>> + kfree(pt);
>> + return ERR_PTR(-ENOMEM);
>> + }
>> +
>> + return pt;
>> +}
>> +
>> +/**
>> + * alloc_pt_range() - Allocate a multiple page tables
>> + * @pd: The page directory which will have at least @count entries
>> + * available to point to the allocated page tables.
>> + * @pde: First page directory entry for which we are allocating.
>> + * @count: Number of pages to allocate.
>> + *
>> + * Allocates multiple page table pages and sets the appropriate entries in the
>> + * page table structure within the page directory. Function cleans up after
>> + * itself on any failures.
>> + *
>> + * Return: 0 if allocation succeeded.
>> + */
>> +static int alloc_pt_range(struct i915_page_directory_entry *pd, uint16_t pde, size_t count)
>> +{
>> + int i, ret;
>> +
>> + /* 512 is the max page tables per page_directory on any platform. */
>> + if (WARN_ON(pde + count > GEN6_PPGTT_PD_ENTRIES))
>> + return -EINVAL;
>> +
>> + for (i = pde; i < pde + count; i++) {
>> + struct i915_page_table_entry *pt = alloc_pt_single();
>> +
>> + if (IS_ERR(pt)) {
>> + ret = PTR_ERR(pt);
>> + goto err_out;
>> + }
>> + WARN(pd->page_table[i],
>> + "Leaking page directory entry %d (%pa)\n",
>> + i, pd->page_table[i]);
>> + pd->page_table[i] = pt;
>> + }
>> +
>> + return 0;
>> +
>> +err_out:
>> + while (i-- > pde)
>> + unmap_and_free_pt(pd->page_table[i]);
>> + return ret;
>> +}
>> +
>> +static void unmap_and_free_pd(struct i915_page_directory_entry *pd)
>> +{
>> + if (pd->page) {
>> + __free_page(pd->page);
>> + kfree(pd);
>> + }
>> +}
>> +
>> +static struct i915_page_directory_entry *alloc_pd_single(void)
>> +{
>> + struct i915_page_directory_entry *pd;
>> +
>> + pd = kzalloc(sizeof(*pd), GFP_KERNEL);
>> + if (!pd)
>> + return ERR_PTR(-ENOMEM);
>> +
>> + pd->page = alloc_page(GFP_KERNEL | __GFP_ZERO);
>> + if (!pd->page) {
>> + kfree(pd);
>> + return ERR_PTR(-ENOMEM);
>> + }
>> +
>> + return pd;
>> +}
>> +
>> /* Broadwell Page Directory Pointer Descriptors */
>> static int gen8_write_pdp(struct intel_engine_cs *ring, unsigned entry,
>> uint64_t val)
>> @@ -311,7 +403,7 @@ static int gen8_mm_switch(struct i915_hw_ppgtt *ppgtt,
>> int used_pd = ppgtt->num_pd_entries / GEN8_PDES_PER_PAGE;
>>
>> for (i = used_pd - 1; i >= 0; i--) {
>> - dma_addr_t addr = ppgtt->pdp.page_directory[i].daddr;
>> + dma_addr_t addr = ppgtt->pdp.page_directory[i]->daddr;
>> ret = gen8_write_pdp(ring, i, addr);
>> if (ret)
>> return ret;
>> @@ -338,8 +430,24 @@ static void gen8_ppgtt_clear_range(struct i915_address_space *vm,
>> I915_CACHE_LLC, use_scratch);
>>
>> while (num_entries) {
>> - struct i915_page_directory_entry *pd = &ppgtt->pdp.page_directory[pdpe];
>> - struct page *page_table = pd->page_table[pde].page;
>> + struct i915_page_directory_entry *pd;
>> + struct i915_page_table_entry *pt;
>> + struct page *page_table;
>> +
>> + if (WARN_ON(!ppgtt->pdp.page_directory[pdpe]))
>> + continue;
>> +
>> + pd = ppgtt->pdp.page_directory[pdpe];
>> +
>> + if (WARN_ON(!pd->page_table[pde]))
>> + continue;
>> +
>> + pt = pd->page_table[pde];
>> +
>> + if (WARN_ON(!pt->page))
>> + continue;
>> +
>> + page_table = pt->page;
>>
>> last_pte = pte + num_entries;
>> if (last_pte > GEN8_PTES_PER_PAGE)
>> @@ -384,8 +492,9 @@ static void gen8_ppgtt_insert_entries(struct i915_address_space *vm,
>> break;
>>
>> if (pt_vaddr == NULL) {
>> - struct i915_page_directory_entry *pd = &ppgtt->pdp.page_directory[pdpe];
>> - struct page *page_table = pd->page_table[pde].page;
>> + struct i915_page_directory_entry *pd = ppgtt->pdp.page_directory[pdpe];
>> + struct i915_page_table_entry *pt = pd->page_table[pde];
>> + struct page *page_table = pt->page;
>>
>> pt_vaddr = kmap_atomic(page_table);
>> }
>> @@ -416,19 +525,16 @@ static void gen8_free_page_tables(struct i915_page_directory_entry *pd)
>> {
>> int i;
>>
>> - if (pd->page_table == NULL)
>> + if (!pd->page)
>> return;
>>
>> - for (i = 0; i < GEN8_PDES_PER_PAGE; i++)
>> - if (pd->page_table[i].page)
>> - __free_page(pd->page_table[i].page);
>> -}
>> + for (i = 0; i < GEN8_PDES_PER_PAGE; i++) {
>> + if (WARN_ON(!pd->page_table[i]))
>> + continue;
>>
>> -static void gen8_free_page_directory(struct i915_page_directory_entry *pd)
>> -{
>> - gen8_free_page_tables(pd);
>> - kfree(pd->page_table);
>> - __free_page(pd->page);
>> + unmap_and_free_pt(pd->page_table[i]);
>> + pd->page_table[i] = NULL;
>> + }
>> }
>>
>> static void gen8_ppgtt_free(struct i915_hw_ppgtt *ppgtt)
>> @@ -436,7 +542,11 @@ static void gen8_ppgtt_free(struct i915_hw_ppgtt *ppgtt)
>> int i;
>>
>> for (i = 0; i < ppgtt->num_pd_pages; i++) {
>> - gen8_free_page_directory(&ppgtt->pdp.page_directory[i]);
>> + if (WARN_ON(!ppgtt->pdp.page_directory[i]))
>> + continue;
>> +
>> + gen8_free_page_tables(ppgtt->pdp.page_directory[i]);
>> + unmap_and_free_pd(ppgtt->pdp.page_directory[i]);
>> }
>> }
>>
>> @@ -448,14 +558,23 @@ static void gen8_ppgtt_unmap_pages(struct i915_hw_ppgtt *ppgtt)
>> for (i = 0; i < ppgtt->num_pd_pages; i++) {
>> /* TODO: In the future we'll support sparse mappings, so this
>> * will have to change. */
>> - if (!ppgtt->pdp.page_directory[i].daddr)
>> + if (!ppgtt->pdp.page_directory[i]->daddr)
>> continue;
>>
>> - pci_unmap_page(hwdev, ppgtt->pdp.page_directory[i].daddr, PAGE_SIZE,
>> + pci_unmap_page(hwdev, ppgtt->pdp.page_directory[i]->daddr, PAGE_SIZE,
>> PCI_DMA_BIDIRECTIONAL);
>>
>> for (j = 0; j < GEN8_PDES_PER_PAGE; j++) {
>> - dma_addr_t addr = ppgtt->pdp.page_directory[i].page_table[j].daddr;
>> + struct i915_page_directory_entry *pd = ppgtt->pdp.page_directory[i];
>> + struct i915_page_table_entry *pt;
>> + dma_addr_t addr;
>> +
>> + if (WARN_ON(!pd->page_table[j]))
>> + continue;
>> +
>> + pt = pd->page_table[j];
>> + addr = pt->daddr;
>> +
>> if (addr)
>> pci_unmap_page(hwdev, addr, PAGE_SIZE,
>> PCI_DMA_BIDIRECTIONAL);
>> @@ -474,25 +593,20 @@ static void gen8_ppgtt_cleanup(struct i915_address_space *vm)
>>
>> static int gen8_ppgtt_allocate_page_tables(struct i915_hw_ppgtt *ppgtt)
>> {
>> - int i, j;
>> + int i, ret;
>>
>> for (i = 0; i < ppgtt->num_pd_pages; i++) {
>> - struct i915_page_directory_entry *pd = &ppgtt->pdp.page_directory[i];
>> - for (j = 0; j < GEN8_PDES_PER_PAGE; j++) {
>> - struct i915_page_table_entry *pt = &pd->page_table[j];
>> -
>> - pt->page = alloc_page(GFP_KERNEL | __GFP_ZERO);
>> - if (!pt->page)
>> - goto unwind_out;
>> -
>> - }
>> + ret = alloc_pt_range(ppgtt->pdp.page_directory[i],
>> + 0, GEN8_PDES_PER_PAGE);
>> + if (ret)
>> + goto unwind_out;
>> }
>>
>> return 0;
>>
>> unwind_out:
>> while (i--)
>> - gen8_free_page_tables(&ppgtt->pdp.page_directory[i]);
>> + gen8_free_page_tables(ppgtt->pdp.page_directory[i]);
>>
>> return -ENOMEM;
>> }
>> @@ -503,19 +617,9 @@ static int gen8_ppgtt_allocate_page_directories(struct i915_hw_ppgtt *ppgtt,
>> int i;
>>
>> for (i = 0; i < max_pdp; i++) {
>> - struct i915_page_table_entry *pt;
>> -
>> - pt = kcalloc(GEN8_PDES_PER_PAGE, sizeof(*pt), GFP_KERNEL);
>> - if (!pt)
>> - goto unwind_out;
>> -
>> - ppgtt->pdp.page_directory[i].page = alloc_page(GFP_KERNEL);
>> - if (!ppgtt->pdp.page_directory[i].page) {
>> - kfree(pt);
>> + ppgtt->pdp.page_directory[i] = alloc_pd_single();
>> + if (IS_ERR(ppgtt->pdp.page_directory[i]))
>> goto unwind_out;
>> - }
>> -
>> - ppgtt->pdp.page_directory[i].page_table = pt;
>> }
>>
>> ppgtt->num_pd_pages = max_pdp;
>> @@ -524,10 +628,8 @@ static int gen8_ppgtt_allocate_page_directories(struct i915_hw_ppgtt *ppgtt,
>> return 0;
>>
>> unwind_out:
>> - while (i--) {
>> - kfree(ppgtt->pdp.page_directory[i].page_table);
>> - __free_page(ppgtt->pdp.page_directory[i].page);
>> - }
>> + while (i--)
>> + unmap_and_free_pd(ppgtt->pdp.page_directory[i]);
>>
>> return -ENOMEM;
>> }
>> @@ -561,14 +663,14 @@ static int gen8_ppgtt_setup_page_directories(struct i915_hw_ppgtt *ppgtt,
>> int ret;
>>
>> pd_addr = pci_map_page(ppgtt->base.dev->pdev,
>> - ppgtt->pdp.page_directory[pd].page, 0,
>> + ppgtt->pdp.page_directory[pd]->page, 0,
>> PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
>>
>> ret = pci_dma_mapping_error(ppgtt->base.dev->pdev, pd_addr);
>> if (ret)
>> return ret;
>>
>> - ppgtt->pdp.page_directory[pd].daddr = pd_addr;
>> + ppgtt->pdp.page_directory[pd]->daddr = pd_addr;
>>
>> return 0;
>> }
>> @@ -578,8 +680,8 @@ static int gen8_ppgtt_setup_page_tables(struct i915_hw_ppgtt *ppgtt,
>> const int pt)
>> {
>> dma_addr_t pt_addr;
>> - struct i915_page_directory_entry *pdir = &ppgtt->pdp.page_directory[pd];
>> - struct i915_page_table_entry *ptab = &pdir->page_table[pt];
>> + struct i915_page_directory_entry *pdir = ppgtt->pdp.page_directory[pd];
>> + struct i915_page_table_entry *ptab = pdir->page_table[pt];
>> struct page *p = ptab->page;
>> int ret;
>>
>> @@ -642,10 +744,12 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt, uint64_t size)
>> * will never need to touch the PDEs again.
>> */
>> for (i = 0; i < max_pdp; i++) {
>> + struct i915_page_directory_entry *pd = ppgtt->pdp.page_directory[i];
>> gen8_ppgtt_pde_t *pd_vaddr;
>> - pd_vaddr = kmap_atomic(ppgtt->pdp.page_directory[i].page);
>> + pd_vaddr = kmap_atomic(ppgtt->pdp.page_directory[i]->page);
>> for (j = 0; j < GEN8_PDES_PER_PAGE; j++) {
>> - dma_addr_t addr = ppgtt->pdp.page_directory[i].page_table[j].daddr;
>> + struct i915_page_table_entry *pt = pd->page_table[j];
>> + dma_addr_t addr = pt->daddr;
>> pd_vaddr[j] = gen8_pde_encode(ppgtt->base.dev, addr,
>> I915_CACHE_LLC);
>> }
>> @@ -696,7 +800,7 @@ static void gen6_dump_ppgtt(struct i915_hw_ppgtt *ppgtt, struct seq_file *m)
>> for (pde = 0; pde < ppgtt->num_pd_entries; pde++) {
>> u32 expected;
>> gen6_gtt_pte_t *pt_vaddr;
>> - dma_addr_t pt_addr = ppgtt->pd.page_table[pde].daddr;
>> + dma_addr_t pt_addr = ppgtt->pd.page_table[pde]->daddr;
>> pd_entry = readl(pd_addr + pde);
>> expected = (GEN6_PDE_ADDR_ENCODE(pt_addr) | GEN6_PDE_VALID);
>>
>> @@ -707,7 +811,7 @@ static void gen6_dump_ppgtt(struct i915_hw_ppgtt *ppgtt, struct seq_file *m)
>> expected);
>> seq_printf(m, "\tPDE: %x\n", pd_entry);
>>
>> - pt_vaddr = kmap_atomic(ppgtt->pd.page_table[pde].page);
>> + pt_vaddr = kmap_atomic(ppgtt->pd.page_table[pde]->page);
>> for (pte = 0; pte < I915_PPGTT_PT_ENTRIES; pte+=4) {
>> unsigned long va =
>> (pde * PAGE_SIZE * I915_PPGTT_PT_ENTRIES) +
>> @@ -746,7 +850,7 @@ static void gen6_write_pdes(struct i915_hw_ppgtt *ppgtt)
>> for (i = 0; i < ppgtt->num_pd_entries; i++) {
>> dma_addr_t pt_addr;
>>
>> - pt_addr = ppgtt->pd.page_table[i].daddr;
>> + pt_addr = ppgtt->pd.page_table[i]->daddr;
>> pd_entry = GEN6_PDE_ADDR_ENCODE(pt_addr);
>> pd_entry |= GEN6_PDE_VALID;
>>
>> @@ -922,7 +1026,7 @@ static void gen6_ppgtt_clear_range(struct i915_address_space *vm,
>> if (last_pte > I915_PPGTT_PT_ENTRIES)
>> last_pte = I915_PPGTT_PT_ENTRIES;
>>
>> - pt_vaddr = kmap_atomic(ppgtt->pd.page_table[act_pt].page);
>> + pt_vaddr = kmap_atomic(ppgtt->pd.page_table[act_pt]->page);
>>
>> for (i = first_pte; i < last_pte; i++)
>> pt_vaddr[i] = scratch_pte;
>> @@ -951,7 +1055,7 @@ static void gen6_ppgtt_insert_entries(struct i915_address_space *vm,
>> pt_vaddr = NULL;
>> for_each_sg_page(pages->sgl, &sg_iter, pages->nents, 0) {
>> if (pt_vaddr == NULL)
>> - pt_vaddr = kmap_atomic(ppgtt->pd.page_table[act_pt].page);
>> + pt_vaddr = kmap_atomic(ppgtt->pd.page_table[act_pt]->page);
>>
>> pt_vaddr[act_pte] =
>> vm->pte_encode(sg_page_iter_dma_address(&sg_iter),
>> @@ -974,7 +1078,7 @@ static void gen6_ppgtt_unmap_pages(struct i915_hw_ppgtt *ppgtt)
>>
>> for (i = 0; i < ppgtt->num_pd_entries; i++)
>> pci_unmap_page(ppgtt->base.dev->pdev,
>> - ppgtt->pd.page_table[i].daddr,
>> + ppgtt->pd.page_table[i]->daddr,
>> 4096, PCI_DMA_BIDIRECTIONAL);
>> }
>>
>> @@ -983,9 +1087,9 @@ static void gen6_ppgtt_free(struct i915_hw_ppgtt *ppgtt)
>> int i;
>>
>> for (i = 0; i < ppgtt->num_pd_entries; i++)
>> - if (ppgtt->pd.page_table[i].page)
>> - __free_page(ppgtt->pd.page_table[i].page);
>> - kfree(ppgtt->pd.page_table);
>> + unmap_and_free_pt(ppgtt->pd.page_table[i]);
>> +
>> + unmap_and_free_pd(&ppgtt->pd);
>> }
>>
>> static void gen6_ppgtt_cleanup(struct i915_address_space *vm)
>> @@ -1040,28 +1144,6 @@ alloc:
>> return 0;
>> }
>>
>> -static int gen6_ppgtt_allocate_page_tables(struct i915_hw_ppgtt *ppgtt)
>> -{
>> - struct i915_page_table_entry *pt;
>> - int i;
>> -
>> - pt = kcalloc(ppgtt->num_pd_entries, sizeof(*pt), GFP_KERNEL);
>> - if (!pt)
>> - return -ENOMEM;
>> -
>> - ppgtt->pd.page_table = pt;
>> -
>> - for (i = 0; i < ppgtt->num_pd_entries; i++) {
>> - pt[i].page = alloc_page(GFP_KERNEL);
>> - if (!pt->page) {
>> - gen6_ppgtt_free(ppgtt);
>> - return -ENOMEM;
>> - }
>> - }
>> -
>> - return 0;
>> -}
>> -
>> static int gen6_ppgtt_alloc(struct i915_hw_ppgtt *ppgtt)
>> {
>> int ret;
>> @@ -1070,7 +1152,7 @@ static int gen6_ppgtt_alloc(struct i915_hw_ppgtt *ppgtt)
>> if (ret)
>> return ret;
>>
>> - ret = gen6_ppgtt_allocate_page_tables(ppgtt);
>> + ret = alloc_pt_range(&ppgtt->pd, 0, ppgtt->num_pd_entries);
>> if (ret) {
>> drm_mm_remove_node(&ppgtt->node);
>> return ret;
>> @@ -1088,7 +1170,7 @@ static int gen6_ppgtt_setup_page_tables(struct i915_hw_ppgtt *ppgtt)
>> struct page *page;
>> dma_addr_t pt_addr;
>>
>> - page = ppgtt->pd.page_table[i].page;
>> + page = ppgtt->pd.page_table[i]->page;
>> pt_addr = pci_map_page(dev->pdev, page, 0, 4096,
>> PCI_DMA_BIDIRECTIONAL);
>>
>> @@ -1097,7 +1179,7 @@ static int gen6_ppgtt_setup_page_tables(struct i915_hw_ppgtt *ppgtt)
>> return -EIO;
>> }
>>
>> - ppgtt->pd.page_table[i].daddr = pt_addr;
>> + ppgtt->pd.page_table[i]->daddr = pt_addr;
>> }
>>
>> return 0;
>> diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
>> index 1144b709..c9e93f5 100644
>> --- a/drivers/gpu/drm/i915/i915_gem_gtt.h
>> +++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
>> @@ -199,12 +199,12 @@ struct i915_page_directory_entry {
>> dma_addr_t daddr;
>> };
>>
>> - struct i915_page_table_entry *page_table;
>> + struct i915_page_table_entry *page_table[GEN6_PPGTT_PD_ENTRIES]; /* PDEs */
>> };
>>
>> struct i915_page_directory_pointer_entry {
>> /* struct page *page; */
>> - struct i915_page_directory_entry page_directory[GEN8_LEGACY_PDPES];
>> + struct i915_page_directory_entry *page_directory[GEN8_LEGACY_PDPES];
>> };
>>
>> struct i915_address_space {
>> diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
>> index 9e71992..bc9c7c3 100644
>> --- a/drivers/gpu/drm/i915/intel_lrc.c
>> +++ b/drivers/gpu/drm/i915/intel_lrc.c
>> @@ -1735,14 +1735,14 @@ populate_lr_context(struct intel_context *ctx, struct drm_i915_gem_object *ctx_o
>> reg_state[CTX_PDP1_LDW] = GEN8_RING_PDP_LDW(ring, 1);
>> reg_state[CTX_PDP0_UDW] = GEN8_RING_PDP_UDW(ring, 0);
>> reg_state[CTX_PDP0_LDW] = GEN8_RING_PDP_LDW(ring, 0);
>> - reg_state[CTX_PDP3_UDW+1] = upper_32_bits(ppgtt->pdp.page_directory[3].daddr);
>> - reg_state[CTX_PDP3_LDW+1] = lower_32_bits(ppgtt->pdp.page_directory[3].daddr);
>> - reg_state[CTX_PDP2_UDW+1] = upper_32_bits(ppgtt->pdp.page_directory[2].daddr);
>> - reg_state[CTX_PDP2_LDW+1] = lower_32_bits(ppgtt->pdp.page_directory[2].daddr);
>> - reg_state[CTX_PDP1_UDW+1] = upper_32_bits(ppgtt->pdp.page_directory[1].daddr);
>> - reg_state[CTX_PDP1_LDW+1] = lower_32_bits(ppgtt->pdp.page_directory[1].daddr);
>> - reg_state[CTX_PDP0_UDW+1] = upper_32_bits(ppgtt->pdp.page_directory[0].daddr);
>> - reg_state[CTX_PDP0_LDW+1] = lower_32_bits(ppgtt->pdp.page_directory[0].daddr);
>> + reg_state[CTX_PDP3_UDW+1] = upper_32_bits(ppgtt->pdp.page_directory[3]->daddr);
>> + reg_state[CTX_PDP3_LDW+1] = lower_32_bits(ppgtt->pdp.page_directory[3]->daddr);
>> + reg_state[CTX_PDP2_UDW+1] = upper_32_bits(ppgtt->pdp.page_directory[2]->daddr);
>> + reg_state[CTX_PDP2_LDW+1] = lower_32_bits(ppgtt->pdp.page_directory[2]->daddr);
>> + reg_state[CTX_PDP1_UDW+1] = upper_32_bits(ppgtt->pdp.page_directory[1]->daddr);
>> + reg_state[CTX_PDP1_LDW+1] = lower_32_bits(ppgtt->pdp.page_directory[1]->daddr);
>> + reg_state[CTX_PDP0_UDW+1] = upper_32_bits(ppgtt->pdp.page_directory[0]->daddr);
>> + reg_state[CTX_PDP0_LDW+1] = lower_32_bits(ppgtt->pdp.page_directory[0]->daddr);
>> if (ring->id == RCS) {
>> reg_state[CTX_LRI_HEADER_2] = MI_LOAD_REGISTER_IMM(1);
>> reg_state[CTX_R_PWR_CLK_STATE] = 0x20c8;
>> --
>> 2.1.1
>>
>> _______________________________________________
>> Intel-gfx mailing list
>> Intel-gfx at lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
> _______________________________________________
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> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
--
Paulo Zanoni
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