*/
const struct i915_ggtt_view i915_ggtt_view_normal;
+const struct i915_ggtt_view i915_ggtt_view_rotated = {
+ .type = I915_GGTT_VIEW_ROTATED
+};
static void bdw_setup_private_ppat(struct drm_i915_private *dev_priv);
static void chv_setup_private_ppat(struct drm_i915_private *dev_priv);
struct device *device = &dev->pdev->dev;
*daddr = dma_map_page(device, page, 0, 4096, PCI_DMA_BIDIRECTIONAL);
- return dma_mapping_error(device, *daddr);
+ if (dma_mapping_error(device, *daddr))
+ return -ENOMEM;
+
+ return 0;
}
-static void unmap_and_free_pt(struct i915_page_table_entry *pt,
+static void unmap_and_free_pt(struct i915_page_table *pt,
struct drm_device *dev)
{
if (WARN_ON(!pt->page))
kfree(pt);
}
-static struct i915_page_table_entry *alloc_pt_single(struct drm_device *dev)
+static void gen8_initialize_pt(struct i915_address_space *vm,
+ struct i915_page_table *pt)
{
- struct i915_page_table_entry *pt;
+ gen8_pte_t *pt_vaddr, scratch_pte;
+ int i;
+
+ pt_vaddr = kmap_atomic(pt->page);
+ scratch_pte = gen8_pte_encode(vm->scratch.addr,
+ I915_CACHE_LLC, true);
+
+ for (i = 0; i < GEN8_PTES; i++)
+ pt_vaddr[i] = scratch_pte;
+
+ if (!HAS_LLC(vm->dev))
+ drm_clflush_virt_range(pt_vaddr, PAGE_SIZE);
+ kunmap_atomic(pt_vaddr);
+}
+
+static struct i915_page_table *alloc_pt_single(struct drm_device *dev)
+{
+ struct i915_page_table *pt;
const size_t count = INTEL_INFO(dev)->gen >= 8 ?
GEN8_PTES : GEN6_PTES;
int ret = -ENOMEM;
if (!pt->used_ptes)
goto fail_bitmap;
- pt->page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+ pt->page = alloc_page(GFP_KERNEL);
if (!pt->page)
goto fail_page;
*
* Return: 0 if allocation succeeded.
*/
-static int alloc_pt_range(struct i915_page_directory_entry *pd, uint16_t pde, size_t count,
- struct drm_device *dev)
+static int alloc_pt_range(struct i915_page_directory *pd, uint16_t pde, size_t count,
+ struct drm_device *dev)
{
int i, ret;
return -EINVAL;
for (i = pde; i < pde + count; i++) {
- struct i915_page_table_entry *pt = alloc_pt_single(dev);
+ struct i915_page_table *pt = alloc_pt_single(dev);
if (IS_ERR(pt)) {
ret = PTR_ERR(pt);
return ret;
}
-static void unmap_and_free_pd(struct i915_page_directory_entry *pd)
+static void unmap_and_free_pd(struct i915_page_directory *pd)
{
if (pd->page) {
__free_page(pd->page);
}
}
-static struct i915_page_directory_entry *alloc_pd_single(void)
+static struct i915_page_directory *alloc_pd_single(void)
{
- struct i915_page_directory_entry *pd;
+ struct i915_page_directory *pd;
pd = kzalloc(sizeof(*pd), GFP_KERNEL);
if (!pd)
return ERR_PTR(-ENOMEM);
- pd->page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+ pd->page = alloc_page(GFP_KERNEL);
if (!pd->page) {
kfree(pd);
return ERR_PTR(-ENOMEM);
I915_CACHE_LLC, use_scratch);
while (num_entries) {
- struct i915_page_directory_entry *pd;
- struct i915_page_table_entry *pt;
+ struct i915_page_directory *pd;
+ struct i915_page_table *pt;
struct page *page_table;
if (WARN_ON(!ppgtt->pdp.page_directory[pdpe]))
break;
if (pt_vaddr == NULL) {
- struct i915_page_directory_entry *pd = ppgtt->pdp.page_directory[pdpe];
- struct i915_page_table_entry *pt = pd->page_table[pde];
+ struct i915_page_directory *pd = ppgtt->pdp.page_directory[pdpe];
+ struct i915_page_table *pt = pd->page_table[pde];
struct page *page_table = pt->page;
pt_vaddr = kmap_atomic(page_table);
}
}
-static void gen8_free_page_tables(struct i915_page_directory_entry *pd, struct drm_device *dev)
+static void __gen8_do_map_pt(gen8_pde_t * const pde,
+ struct i915_page_table *pt,
+ struct drm_device *dev)
+{
+ gen8_pde_t entry =
+ gen8_pde_encode(dev, pt->daddr, I915_CACHE_LLC);
+ *pde = entry;
+}
+
+static void gen8_initialize_pd(struct i915_address_space *vm,
+ struct i915_page_directory *pd)
+{
+ struct i915_hw_ppgtt *ppgtt =
+ container_of(vm, struct i915_hw_ppgtt, base);
+ gen8_pde_t *page_directory;
+ struct i915_page_table *pt;
+ int i;
+
+ page_directory = kmap_atomic(pd->page);
+ pt = ppgtt->scratch_pt;
+ for (i = 0; i < I915_PDES; i++)
+ /* Map the PDE to the page table */
+ __gen8_do_map_pt(page_directory + i, pt, vm->dev);
+
+ if (!HAS_LLC(vm->dev))
+ drm_clflush_virt_range(page_directory, PAGE_SIZE);
+
+ kunmap_atomic(page_directory);
+}
+
+static void gen8_free_page_tables(struct i915_page_directory *pd, struct drm_device *dev)
{
int i;
gen8_free_page_tables(ppgtt->pdp.page_directory[i], ppgtt->base.dev);
unmap_and_free_pd(ppgtt->pdp.page_directory[i]);
}
-}
-
-static void gen8_ppgtt_unmap_pages(struct i915_hw_ppgtt *ppgtt)
-{
- struct pci_dev *hwdev = ppgtt->base.dev->pdev;
- int i, j;
-
- 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)
- continue;
-
- pci_unmap_page(hwdev, ppgtt->pdp.page_directory[i]->daddr, PAGE_SIZE,
- PCI_DMA_BIDIRECTIONAL);
-
- for (j = 0; j < I915_PDES; j++) {
- 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);
- }
- }
+ unmap_and_free_pt(ppgtt->scratch_pt, ppgtt->base.dev);
}
static void gen8_ppgtt_cleanup(struct i915_address_space *vm)
struct i915_hw_ppgtt *ppgtt =
container_of(vm, struct i915_hw_ppgtt, base);
- gen8_ppgtt_unmap_pages(ppgtt);
gen8_ppgtt_free(ppgtt);
}
return -ENOMEM;
}
-static int gen8_ppgtt_allocate_page_directories(struct i915_hw_ppgtt *ppgtt,
- const int max_pdp)
+static int gen8_ppgtt_alloc_page_directories(struct i915_page_directory_pointer *pdp,
+ uint64_t start,
+ uint64_t length)
{
- int i;
+ struct i915_hw_ppgtt *ppgtt =
+ container_of(pdp, struct i915_hw_ppgtt, pdp);
+ struct i915_page_directory *unused;
+ uint64_t temp;
+ uint32_t pdpe;
+
+ /* FIXME: PPGTT container_of won't work for 64b */
+ WARN_ON((start + length) > 0x800000000ULL);
+
+ gen8_for_each_pdpe(unused, pdp, start, length, temp, pdpe) {
+ WARN_ON(unused);
+ pdp->page_directory[pdpe] = alloc_pd_single();
+ if (IS_ERR(ppgtt->pdp.page_directory[pdpe]))
+ goto unwind_out;
- for (i = 0; i < max_pdp; i++) {
- ppgtt->pdp.page_directory[i] = alloc_pd_single();
- if (IS_ERR(ppgtt->pdp.page_directory[i]))
+ gen8_initialize_pd(&ppgtt->base,
+ ppgtt->pdp.page_directory[pdpe]);
+ ppgtt->num_pd_pages++;
+ }
+
+ /* XXX: Still alloc all page directories in systems with less than
+ * 4GB of memory. This won't be needed after a subsequent patch.
+ */
+ while (ppgtt->num_pd_pages < GEN8_LEGACY_PDPES) {
+ ppgtt->pdp.page_directory[ppgtt->num_pd_pages] = alloc_pd_single();
+ if (IS_ERR(ppgtt->pdp.page_directory[ppgtt->num_pd_pages]))
goto unwind_out;
+
+ gen8_initialize_pd(&ppgtt->base,
+ ppgtt->pdp.page_directory[ppgtt->num_pd_pages]);
+ pdpe++;
+ ppgtt->num_pd_pages++;
}
- ppgtt->num_pd_pages = max_pdp;
BUG_ON(ppgtt->num_pd_pages > GEN8_LEGACY_PDPES);
return 0;
unwind_out:
- while (i--)
- unmap_and_free_pd(ppgtt->pdp.page_directory[i]);
+ while (pdpe--) {
+ unmap_and_free_pd(ppgtt->pdp.page_directory[pdpe]);
+ ppgtt->num_pd_pages--;
+ }
+
+ WARN_ON(ppgtt->num_pd_pages);
return -ENOMEM;
}
{
int ret;
- ret = gen8_ppgtt_allocate_page_directories(ppgtt, max_pdp);
+ ret = gen8_ppgtt_alloc_page_directories(&ppgtt->pdp, ppgtt->base.start,
+ ppgtt->base.total);
if (ret)
return ret;
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 *pdir = ppgtt->pdp.page_directory[pd];
+ struct i915_page_table *ptab = pdir->page_table[pt];
struct page *p = ptab->page;
int ret;
+ gen8_initialize_pt(&ppgtt->base, ptab);
+
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 (size % (1<<30))
DRM_INFO("Pages will be wasted unless GTT size (%llu) is divisible by 1GB\n", size);
+ ppgtt->base.start = 0;
+ /* This is the area that we advertise as usable for the caller */
+ ppgtt->base.total = max_pdp * I915_PDES * GEN8_PTES * PAGE_SIZE;
+ WARN_ON(ppgtt->base.total == 0);
+
+ ppgtt->scratch_pt = alloc_pt_single(ppgtt->base.dev);
+ if (IS_ERR(ppgtt->scratch_pt))
+ return PTR_ERR(ppgtt->scratch_pt);
+
+ gen8_initialize_pt(&ppgtt->base, ppgtt->scratch_pt);
+
/* 1. Do all our allocations for page directories and page tables.
* We allocate more than was asked so that we can point the unused parts
* to valid entries that point to scratch page. Dynamic page tables
}
/*
- * 3. Map all the page directory entires to point to the page tables
+ * 3. Map all the page directory entries to point to the page tables
* we've allocated.
*
* For now, the PPGTT helper functions all require that the PDEs are
* will never need to touch the PDEs again.
*/
for (i = 0; i < GEN8_LEGACY_PDPES; i++) {
- struct i915_page_directory_entry *pd = ppgtt->pdp.page_directory[i];
+ struct i915_page_directory *pd = ppgtt->pdp.page_directory[i];
gen8_pde_t *pd_vaddr;
pd_vaddr = kmap_atomic(ppgtt->pdp.page_directory[i]->page);
for (j = 0; j < I915_PDES; j++) {
- struct i915_page_table_entry *pt = pd->page_table[j];
+ struct i915_page_table *pt = pd->page_table[j];
dma_addr_t addr = pt->daddr;
pd_vaddr[j] = gen8_pde_encode(ppgtt->base.dev, addr,
I915_CACHE_LLC);
ppgtt->base.clear_range = gen8_ppgtt_clear_range;
ppgtt->base.insert_entries = gen8_ppgtt_insert_entries;
ppgtt->base.cleanup = gen8_ppgtt_cleanup;
- ppgtt->base.start = 0;
-
- /* This is the area that we advertise as usable for the caller */
- ppgtt->base.total = max_pdp * I915_PDES * GEN8_PTES * PAGE_SIZE;
/* Set all ptes to a valid scratch page. Also above requested space */
ppgtt->base.clear_range(&ppgtt->base, 0,
return 0;
bail:
- gen8_ppgtt_unmap_pages(ppgtt);
gen8_ppgtt_free(ppgtt);
return ret;
}
}
/* Write pde (index) from the page directory @pd to the page table @pt */
-static void gen6_write_pde(struct i915_page_directory_entry *pd,
- const int pde, struct i915_page_table_entry *pt)
+static void gen6_write_pde(struct i915_page_directory *pd,
+ const int pde, struct i915_page_table *pt)
{
/* Caller needs to make sure the write completes if necessary */
struct i915_hw_ppgtt *ppgtt =
/* Write all the page tables found in the ppgtt structure to incrementing page
* directories. */
static void gen6_write_page_range(struct drm_i915_private *dev_priv,
- struct i915_page_directory_entry *pd,
+ struct i915_page_directory *pd,
uint32_t start, uint32_t length)
{
- struct i915_page_table_entry *pt;
+ struct i915_page_table *pt;
uint32_t pde, temp;
gen6_for_each_pde(pt, pd, start, length, temp, pde)
kunmap_atomic(pt_vaddr);
}
-static void gen6_ppgtt_unmap_pages(struct i915_hw_ppgtt *ppgtt)
-{
- int i;
-
- 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);
-}
-
/* PDE TLBs are a pain invalidate pre GEN8. It requires a context reload. If we
* are switching between contexts with the same LRCA, we also must do a force
* restore.
ppgtt->pd_dirty_rings = INTEL_INFO(ppgtt->base.dev)->ring_mask;
}
+static void gen6_initialize_pt(struct i915_address_space *vm,
+ struct i915_page_table *pt)
+{
+ gen6_pte_t *pt_vaddr, scratch_pte;
+ int i;
+
+ WARN_ON(vm->scratch.addr == 0);
+
+ scratch_pte = vm->pte_encode(vm->scratch.addr,
+ I915_CACHE_LLC, true, 0);
+
+ pt_vaddr = kmap_atomic(pt->page);
+
+ for (i = 0; i < GEN6_PTES; i++)
+ pt_vaddr[i] = scratch_pte;
+
+ kunmap_atomic(pt_vaddr);
+}
+
static int gen6_alloc_va_range(struct i915_address_space *vm,
uint64_t start, uint64_t length)
{
+ DECLARE_BITMAP(new_page_tables, I915_PDES);
+ struct drm_device *dev = vm->dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
struct i915_hw_ppgtt *ppgtt =
container_of(vm, struct i915_hw_ppgtt, base);
- struct i915_page_table_entry *pt;
+ struct i915_page_table *pt;
+ const uint32_t start_save = start, length_save = length;
uint32_t pde, temp;
+ int ret;
+
+ WARN_ON(upper_32_bits(start));
+
+ bitmap_zero(new_page_tables, I915_PDES);
+
+ /* The allocation is done in two stages so that we can bail out with
+ * minimal amount of pain. The first stage finds new page tables that
+ * need allocation. The second stage marks use ptes within the page
+ * tables.
+ */
+ gen6_for_each_pde(pt, &ppgtt->pd, start, length, temp, pde) {
+ if (pt != ppgtt->scratch_pt) {
+ WARN_ON(bitmap_empty(pt->used_ptes, GEN6_PTES));
+ continue;
+ }
+
+ /* We've already allocated a page table */
+ WARN_ON(!bitmap_empty(pt->used_ptes, GEN6_PTES));
+
+ pt = alloc_pt_single(dev);
+ if (IS_ERR(pt)) {
+ ret = PTR_ERR(pt);
+ goto unwind_out;
+ }
+
+ gen6_initialize_pt(vm, pt);
+
+ ppgtt->pd.page_table[pde] = pt;
+ set_bit(pde, new_page_tables);
+ trace_i915_page_table_entry_alloc(vm, pde, start, GEN6_PDE_SHIFT);
+ }
+
+ start = start_save;
+ length = length_save;
gen6_for_each_pde(pt, &ppgtt->pd, start, length, temp, pde) {
DECLARE_BITMAP(tmp_bitmap, GEN6_PTES);
bitmap_set(tmp_bitmap, gen6_pte_index(start),
gen6_pte_count(start, length));
- bitmap_or(pt->used_ptes, pt->used_ptes, tmp_bitmap,
+ if (test_and_clear_bit(pde, new_page_tables))
+ gen6_write_pde(&ppgtt->pd, pde, pt);
+
+ trace_i915_page_table_entry_map(vm, pde, pt,
+ gen6_pte_index(start),
+ gen6_pte_count(start, length),
+ GEN6_PTES);
+ bitmap_or(pt->used_ptes, tmp_bitmap, pt->used_ptes,
GEN6_PTES);
}
+ WARN_ON(!bitmap_empty(new_page_tables, I915_PDES));
+
+ /* Make sure write is complete before other code can use this page
+ * table. Also require for WC mapped PTEs */
+ readl(dev_priv->gtt.gsm);
+
mark_tlbs_dirty(ppgtt);
return 0;
+
+unwind_out:
+ for_each_set_bit(pde, new_page_tables, I915_PDES) {
+ struct i915_page_table *pt = ppgtt->pd.page_table[pde];
+
+ ppgtt->pd.page_table[pde] = ppgtt->scratch_pt;
+ unmap_and_free_pt(pt, vm->dev);
+ }
+
+ mark_tlbs_dirty(ppgtt);
+ return ret;
}
static void gen6_ppgtt_free(struct i915_hw_ppgtt *ppgtt)
{
int i;
- for (i = 0; i < ppgtt->num_pd_entries; i++)
- unmap_and_free_pt(ppgtt->pd.page_table[i], ppgtt->base.dev);
+ for (i = 0; i < ppgtt->num_pd_entries; i++) {
+ struct i915_page_table *pt = ppgtt->pd.page_table[i];
+
+ if (pt != ppgtt->scratch_pt)
+ unmap_and_free_pt(ppgtt->pd.page_table[i], ppgtt->base.dev);
+ }
+ unmap_and_free_pt(ppgtt->scratch_pt, ppgtt->base.dev);
unmap_and_free_pd(&ppgtt->pd);
}
drm_mm_remove_node(&ppgtt->node);
- gen6_ppgtt_unmap_pages(ppgtt);
gen6_ppgtt_free(ppgtt);
}
* size. We allocate at the top of the GTT to avoid fragmentation.
*/
BUG_ON(!drm_mm_initialized(&dev_priv->gtt.base.mm));
+ ppgtt->scratch_pt = alloc_pt_single(ppgtt->base.dev);
+ if (IS_ERR(ppgtt->scratch_pt))
+ return PTR_ERR(ppgtt->scratch_pt);
+
+ gen6_initialize_pt(&ppgtt->base, ppgtt->scratch_pt);
+
alloc:
ret = drm_mm_insert_node_in_range_generic(&dev_priv->gtt.base.mm,
&ppgtt->node, GEN6_PD_SIZE,
return 0;
err_out:
+ unmap_and_free_pt(ppgtt->scratch_pt, ppgtt->base.dev);
return ret;
}
static int gen6_ppgtt_alloc(struct i915_hw_ppgtt *ppgtt)
{
- int ret;
-
- ret = gen6_ppgtt_allocate_page_directories(ppgtt);
- if (ret)
- return ret;
-
- ret = alloc_pt_range(&ppgtt->pd, 0, ppgtt->num_pd_entries,
- ppgtt->base.dev);
+ return gen6_ppgtt_allocate_page_directories(ppgtt);
+}
- if (ret) {
- drm_mm_remove_node(&ppgtt->node);
- return ret;
- }
+static void gen6_scratch_va_range(struct i915_hw_ppgtt *ppgtt,
+ uint64_t start, uint64_t length)
+{
+ struct i915_page_table *unused;
+ uint32_t pde, temp;
- return 0;
+ gen6_for_each_pde(unused, &ppgtt->pd, start, length, temp, pde)
+ ppgtt->pd.page_table[pde] = ppgtt->scratch_pt;
}
-static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
+static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt, bool aliasing)
{
struct drm_device *dev = ppgtt->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
if (ret)
return ret;
+ if (aliasing) {
+ /* preallocate all pts */
+ ret = alloc_pt_range(&ppgtt->pd, 0, ppgtt->num_pd_entries,
+ ppgtt->base.dev);
+
+ if (ret) {
+ gen6_ppgtt_cleanup(&ppgtt->base);
+ return ret;
+ }
+ }
+
ppgtt->base.allocate_va_range = gen6_alloc_va_range;
ppgtt->base.clear_range = gen6_ppgtt_clear_range;
ppgtt->base.insert_entries = gen6_ppgtt_insert_entries;
ppgtt->pd_addr = (gen6_pte_t __iomem *)dev_priv->gtt.gsm +
ppgtt->pd.pd_offset / sizeof(gen6_pte_t);
- ppgtt->base.clear_range(&ppgtt->base, 0, ppgtt->base.total, true);
+ if (aliasing)
+ ppgtt->base.clear_range(&ppgtt->base, 0, ppgtt->base.total, true);
+ else
+ gen6_scratch_va_range(ppgtt, 0, ppgtt->base.total);
gen6_write_page_range(dev_priv, &ppgtt->pd, 0, ppgtt->base.total);
return 0;
}
-static int __hw_ppgtt_init(struct drm_device *dev, struct i915_hw_ppgtt *ppgtt)
+static int __hw_ppgtt_init(struct drm_device *dev, struct i915_hw_ppgtt *ppgtt,
+ bool aliasing)
{
struct drm_i915_private *dev_priv = dev->dev_private;
ppgtt->base.scratch = dev_priv->gtt.base.scratch;
if (INTEL_INFO(dev)->gen < 8)
- return gen6_ppgtt_init(ppgtt);
+ return gen6_ppgtt_init(ppgtt, aliasing);
else
return gen8_ppgtt_init(ppgtt, dev_priv->gtt.base.total);
}
struct drm_i915_private *dev_priv = dev->dev_private;
int ret = 0;
- ret = __hw_ppgtt_init(dev, ppgtt);
+ ret = __hw_ppgtt_init(dev, ppgtt, false);
if (ret == 0) {
kref_init(&ppgtt->ref);
drm_mm_init(&ppgtt->base.mm, ppgtt->base.start,
if (!ppgtt)
return -ENOMEM;
- ret = __hw_ppgtt_init(dev, ppgtt);
- if (ret != 0)
+ ret = __hw_ppgtt_init(dev, ppgtt, true);
+ if (ret) {
+ kfree(ppgtt);
return ret;
+ }
dev_priv->mm.aliasing_ppgtt = ppgtt;
}
}
+static void
+rotate_pages(dma_addr_t *in, unsigned int width, unsigned int height,
+ struct sg_table *st)
+{
+ unsigned int column, row;
+ unsigned int src_idx;
+ struct scatterlist *sg = st->sgl;
+
+ st->nents = 0;
+
+ for (column = 0; column < width; column++) {
+ src_idx = width * (height - 1) + column;
+ for (row = 0; row < height; row++) {
+ st->nents++;
+ /* We don't need the pages, but need to initialize
+ * the entries so the sg list can be happily traversed.
+ * The only thing we need are DMA addresses.
+ */
+ sg_set_page(sg, NULL, PAGE_SIZE, 0);
+ sg_dma_address(sg) = in[src_idx];
+ sg_dma_len(sg) = PAGE_SIZE;
+ sg = sg_next(sg);
+ src_idx -= width;
+ }
+ }
+}
-static inline
-int i915_get_ggtt_vma_pages(struct i915_vma *vma)
+static struct sg_table *
+intel_rotate_fb_obj_pages(struct i915_ggtt_view *ggtt_view,
+ struct drm_i915_gem_object *obj)
{
+ struct drm_device *dev = obj->base.dev;
+ struct intel_rotation_info *rot_info = &ggtt_view->rotation_info;
+ unsigned long size, pages, rot_pages;
+ struct sg_page_iter sg_iter;
+ unsigned long i;
+ dma_addr_t *page_addr_list;
+ struct sg_table *st;
+ unsigned int tile_pitch, tile_height;
+ unsigned int width_pages, height_pages;
+ int ret = -ENOMEM;
+
+ pages = obj->base.size / PAGE_SIZE;
+
+ /* Calculate tiling geometry. */
+ tile_height = intel_tile_height(dev, rot_info->pixel_format,
+ rot_info->fb_modifier);
+ tile_pitch = PAGE_SIZE / tile_height;
+ width_pages = DIV_ROUND_UP(rot_info->pitch, tile_pitch);
+ height_pages = DIV_ROUND_UP(rot_info->height, tile_height);
+ rot_pages = width_pages * height_pages;
+ size = rot_pages * PAGE_SIZE;
+
+ /* Allocate a temporary list of source pages for random access. */
+ page_addr_list = drm_malloc_ab(pages, sizeof(dma_addr_t));
+ if (!page_addr_list)
+ return ERR_PTR(ret);
+
+ /* Allocate target SG list. */
+ st = kmalloc(sizeof(*st), GFP_KERNEL);
+ if (!st)
+ goto err_st_alloc;
+
+ ret = sg_alloc_table(st, rot_pages, GFP_KERNEL);
+ if (ret)
+ goto err_sg_alloc;
+
+ /* Populate source page list from the object. */
+ i = 0;
+ for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents, 0) {
+ page_addr_list[i] = sg_page_iter_dma_address(&sg_iter);
+ i++;
+ }
+
+ /* Rotate the pages. */
+ rotate_pages(page_addr_list, width_pages, height_pages, st);
+
+ DRM_DEBUG_KMS(
+ "Created rotated page mapping for object size %lu (pitch=%u, height=%u, pixel_format=0x%x, %ux%u tiles, %lu pages).\n",
+ size, rot_info->pitch, rot_info->height,
+ rot_info->pixel_format, width_pages, height_pages,
+ rot_pages);
+
+ drm_free_large(page_addr_list);
+
+ return st;
+
+err_sg_alloc:
+ kfree(st);
+err_st_alloc:
+ drm_free_large(page_addr_list);
+
+ DRM_DEBUG_KMS(
+ "Failed to create rotated mapping for object size %lu! (%d) (pitch=%u, height=%u, pixel_format=0x%x, %ux%u tiles, %lu pages)\n",
+ size, ret, rot_info->pitch, rot_info->height,
+ rot_info->pixel_format, width_pages, height_pages,
+ rot_pages);
+ return ERR_PTR(ret);
+}
+
+static inline int
+i915_get_ggtt_vma_pages(struct i915_vma *vma)
+{
+ int ret = 0;
+
if (vma->ggtt_view.pages)
return 0;
if (vma->ggtt_view.type == I915_GGTT_VIEW_NORMAL)
vma->ggtt_view.pages = vma->obj->pages;
+ else if (vma->ggtt_view.type == I915_GGTT_VIEW_ROTATED)
+ vma->ggtt_view.pages =
+ intel_rotate_fb_obj_pages(&vma->ggtt_view, vma->obj);
else
WARN_ONCE(1, "GGTT view %u not implemented!\n",
vma->ggtt_view.type);
if (!vma->ggtt_view.pages) {
DRM_ERROR("Failed to get pages for GGTT view type %u!\n",
vma->ggtt_view.type);
- return -EINVAL;
+ ret = -EINVAL;
+ } else if (IS_ERR(vma->ggtt_view.pages)) {
+ ret = PTR_ERR(vma->ggtt_view.pages);
+ vma->ggtt_view.pages = NULL;
+ DRM_ERROR("Failed to get pages for VMA view type %u (%d)!\n",
+ vma->ggtt_view.type, ret);
}
- return 0;
+ return ret;
}
/**
projects / deliverable / linux.git / blobdiff