drm/i915: Complete page table structures

Move the remaining members over to the new page table structures.

This can be squashed with the previous commit if desire. The reasoning
is the same as that patch. I simply felt it is easier to review if split.

v2: In lrc: s/ppgtt->pd_dma_addr[i]/ppgtt->pdp.page_directory[i].daddr/
v3: Rebase.
v4: Rebased after s/page_tables/page_table/.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Michel Thierry <michel.thierry@intel.com> (v2+)
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 29 insertions, 56 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 874d9ccbe086..ab6f1d483b38 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -311,7 +311,7 @@ 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->pd_dma_addr[i];
+                dma_addr_t addr = ppgtt->pdp.page_directory[i].daddr;
                 ret = gen8_write_pdp(ring, i, addr);
                 if (ret)
                         return ret;
@@ -437,7 +437,6 @@ static void gen8_ppgtt_free(struct i915_hw_ppgtt *ppgtt)
 
         for (i = 0; i < ppgtt->num_pd_pages; i++) {
                 gen8_free_page_directory(&ppgtt->pdp.page_directory[i]);
-                kfree(ppgtt->gen8_pt_dma_addr[i]);
         }
 }
 
@@ -449,14 +448,14 @@ 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->pd_dma_addr[i])
+                if (!ppgtt->pdp.page_directory[i].daddr)
                         continue;
 
-                pci_unmap_page(hwdev, ppgtt->pd_dma_addr[i], 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->gen8_pt_dma_addr[i][j];
+                        dma_addr_t addr = ppgtt->pdp.page_directory[i].page_table[j].daddr;
                         if (addr)
                                 pci_unmap_page(hwdev, addr, PAGE_SIZE,
                                                PCI_DMA_BIDIRECTIONAL);
@@ -473,32 +472,19 @@ static void gen8_ppgtt_cleanup(struct i915_address_space *vm)
         gen8_ppgtt_free(ppgtt);
 }
 
-static int gen8_ppgtt_allocate_dma(struct i915_hw_ppgtt *ppgtt)
-{
-        int i;
-
-        for (i = 0; i < ppgtt->num_pd_pages; i++) {
-                ppgtt->gen8_pt_dma_addr[i] = kcalloc(GEN8_PDES_PER_PAGE,
-                                                     sizeof(dma_addr_t),
-                                                     GFP_KERNEL);
-                if (!ppgtt->gen8_pt_dma_addr[i])
-                        return -ENOMEM;
-        }
-
-        return 0;
-}
-
 static int gen8_ppgtt_allocate_page_tables(struct i915_hw_ppgtt *ppgtt)
 {
         int i, j;
 
         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 = &ppgtt->pdp.page_directory[i].page_table[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;
+
                 }
         }
 
@@ -561,10 +547,6 @@ static int gen8_ppgtt_alloc(struct i915_hw_ppgtt *ppgtt,
 
         ppgtt->num_pd_entries = max_pdp * GEN8_PDES_PER_PAGE;
 
-        ret = gen8_ppgtt_allocate_dma(ppgtt);
-        if (ret)
-                goto err_out;
-
         return 0;
 
 err_out:
@@ -586,7 +568,7 @@ static int gen8_ppgtt_setup_page_directories(struct i915_hw_ppgtt *ppgtt,
         if (ret)
                 return ret;
 
-        ppgtt->pd_dma_addr[pd] = pd_addr;
+        ppgtt->pdp.page_directory[pd].daddr = pd_addr;
 
         return 0;
 }
@@ -596,17 +578,18 @@ static int gen8_ppgtt_setup_page_tables(struct i915_hw_ppgtt *ppgtt,
                                         const int pt)
 {
         dma_addr_t pt_addr;
-        struct page *p;
+        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;
 
-        p = ppgtt->pdp.page_directory[pd].page_table[pt].page;
         pt_addr = pci_map_page(ppgtt->base.dev->pdev,
                                p, 0, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
         ret = pci_dma_mapping_error(ppgtt->base.dev->pdev, pt_addr);
         if (ret)
                 return ret;
 
-        ppgtt->gen8_pt_dma_addr[pd][pt] = pt_addr;
+        ptab->daddr = pt_addr;
 
         return 0;
 }
@@ -662,7 +645,7 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt, uint64_t size)
                 gen8_ppgtt_pde_t *pd_vaddr;
                 pd_vaddr = kmap_atomic(ppgtt->pdp.page_directory[i].page);
                 for (j = 0; j < GEN8_PDES_PER_PAGE; j++) {
-                        dma_addr_t addr = ppgtt->gen8_pt_dma_addr[i][j];
+                        dma_addr_t addr = ppgtt->pdp.page_directory[i].page_table[j].daddr;
                         pd_vaddr[j] = gen8_pde_encode(ppgtt->base.dev, addr,
                                                       I915_CACHE_LLC);
                 }
@@ -705,14 +688,15 @@ static void gen6_dump_ppgtt(struct i915_hw_ppgtt *ppgtt, struct seq_file *m)
         scratch_pte = vm->pte_encode(vm->scratch.addr, I915_CACHE_LLC, true, 0);
 
         pd_addr = (gen6_gtt_pte_t __iomem *)dev_priv->gtt.gsm +
-                ppgtt->pd_offset / sizeof(gen6_gtt_pte_t);
+                ppgtt->pd.pd_offset / sizeof(gen6_gtt_pte_t);
 
         seq_printf(m, "  VM %p (pd_offset %x-%x):\n", vm,
-                   ppgtt->pd_offset, ppgtt->pd_offset + ppgtt->num_pd_entries);
+                   ppgtt->pd.pd_offset,
+                   ppgtt->pd.pd_offset + ppgtt->num_pd_entries);
         for (pde = 0; pde < ppgtt->num_pd_entries; pde++) {
                 u32 expected;
                 gen6_gtt_pte_t *pt_vaddr;
-                dma_addr_t pt_addr = ppgtt->pt_dma_addr[pde];
+                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);
 
@@ -756,13 +740,13 @@ static void gen6_write_pdes(struct i915_hw_ppgtt *ppgtt)
         uint32_t pd_entry;
         int i;
 
-        WARN_ON(ppgtt->pd_offset & 0x3f);
+        WARN_ON(ppgtt->pd.pd_offset & 0x3f);
         pd_addr = (gen6_gtt_pte_t __iomem*)dev_priv->gtt.gsm +
-                ppgtt->pd_offset / sizeof(gen6_gtt_pte_t);
+                ppgtt->pd.pd_offset / sizeof(gen6_gtt_pte_t);
         for (i = 0; i < ppgtt->num_pd_entries; i++) {
                 dma_addr_t pt_addr;
 
-                pt_addr = ppgtt->pt_dma_addr[i];
+                pt_addr = ppgtt->pd.page_table[i].daddr;
                 pd_entry = GEN6_PDE_ADDR_ENCODE(pt_addr);
                 pd_entry |= GEN6_PDE_VALID;
 
@@ -773,9 +757,9 @@ static void gen6_write_pdes(struct i915_hw_ppgtt *ppgtt)
 
 static uint32_t get_pd_offset(struct i915_hw_ppgtt *ppgtt)
 {
-        BUG_ON(ppgtt->pd_offset & 0x3f);
+        BUG_ON(ppgtt->pd.pd_offset & 0x3f);
 
-        return (ppgtt->pd_offset / 64) << 16;
+        return (ppgtt->pd.pd_offset / 64) << 16;
 }
 
 static int hsw_mm_switch(struct i915_hw_ppgtt *ppgtt,
@@ -988,19 +972,16 @@ static void gen6_ppgtt_unmap_pages(struct i915_hw_ppgtt *ppgtt)
 {
         int i;
 
-        if (ppgtt->pt_dma_addr) {
-                for (i = 0; i < ppgtt->num_pd_entries; i++)
-                        pci_unmap_page(ppgtt->base.dev->pdev,
-                                       ppgtt->pt_dma_addr[i],
-                                       4096, PCI_DMA_BIDIRECTIONAL);
-        }
+        for (i = 0; i < ppgtt->num_pd_entries; i++)
+                pci_unmap_page(ppgtt->base.dev->pdev,
+                               ppgtt->pd.page_table[i].daddr,
+                               4096, PCI_DMA_BIDIRECTIONAL);
 }
 
 static void gen6_ppgtt_free(struct i915_hw_ppgtt *ppgtt)
 {
         int i;
 
-        kfree(ppgtt->pt_dma_addr);
         for (i = 0; i < ppgtt->num_pd_entries; i++)
                 if (ppgtt->pd.page_table[i].page)
                         __free_page(ppgtt->pd.page_table[i].page);
@@ -1095,14 +1076,6 @@ static int gen6_ppgtt_alloc(struct i915_hw_ppgtt *ppgtt)
                 return ret;
         }
 
-        ppgtt->pt_dma_addr = kcalloc(ppgtt->num_pd_entries, sizeof(dma_addr_t),
-                                     GFP_KERNEL);
-        if (!ppgtt->pt_dma_addr) {
-                drm_mm_remove_node(&ppgtt->node);
-                gen6_ppgtt_free(ppgtt);
-                return -ENOMEM;
-        }
-
         return 0;
 }
 
@@ -1124,7 +1097,7 @@ static int gen6_ppgtt_setup_page_tables(struct i915_hw_ppgtt *ppgtt)
                         return -EIO;
                 }
 
-                ppgtt->pt_dma_addr[i] = pt_addr;
+                ppgtt->pd.page_table[i].daddr = pt_addr;
         }
 
         return 0;
@@ -1166,7 +1139,7 @@ static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
         ppgtt->base.total = ppgtt->num_pd_entries * I915_PPGTT_PT_ENTRIES * PAGE_SIZE;
         ppgtt->debug_dump = gen6_dump_ppgtt;
 
-        ppgtt->pd_offset =
+        ppgtt->pd.pd_offset =
                 ppgtt->node.start / PAGE_SIZE * sizeof(gen6_gtt_pte_t);
 
         ppgtt->base.clear_range(&ppgtt->base, 0, ppgtt->base.total, true);
@@ -1177,7 +1150,7 @@ static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
 
         gen6_write_pdes(ppgtt);
         DRM_DEBUG("Adding PPGTT at offset %x\n",
-                  ppgtt->pd_offset << 10);
+                  ppgtt->pd.pd_offset << 10);
 
         return 0;
 }