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path: root/drivers/gpu/drm/i915/i915_gem_gtt.c
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Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_gtt.c')
-rw-r--r--drivers/gpu/drm/i915/i915_gem_gtt.c275
1 files changed, 274 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 6042c5e6d278..2eacd78bb93b 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -29,6 +29,279 @@
#include "i915_trace.h"
#include "intel_drv.h"
+/* PPGTT support for Sandybdrige/Gen6 and later */
+static void i915_ppgtt_clear_range(struct i915_hw_ppgtt *ppgtt,
+ unsigned first_entry,
+ unsigned num_entries)
+{
+ uint32_t *pt_vaddr;
+ uint32_t scratch_pte;
+ unsigned act_pd = first_entry / I915_PPGTT_PT_ENTRIES;
+ unsigned first_pte = first_entry % I915_PPGTT_PT_ENTRIES;
+ unsigned last_pte, i;
+
+ scratch_pte = GEN6_PTE_ADDR_ENCODE(ppgtt->scratch_page_dma_addr);
+ scratch_pte |= GEN6_PTE_VALID | GEN6_PTE_CACHE_LLC;
+
+ while (num_entries) {
+ last_pte = first_pte + num_entries;
+ if (last_pte > I915_PPGTT_PT_ENTRIES)
+ last_pte = I915_PPGTT_PT_ENTRIES;
+
+ pt_vaddr = kmap_atomic(ppgtt->pt_pages[act_pd]);
+
+ for (i = first_pte; i < last_pte; i++)
+ pt_vaddr[i] = scratch_pte;
+
+ kunmap_atomic(pt_vaddr);
+
+ num_entries -= last_pte - first_pte;
+ first_pte = 0;
+ act_pd++;
+ }
+}
+
+int i915_gem_init_aliasing_ppgtt(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct i915_hw_ppgtt *ppgtt;
+ uint32_t pd_entry;
+ unsigned first_pd_entry_in_global_pt;
+ uint32_t __iomem *pd_addr;
+ int i;
+ int ret = -ENOMEM;
+
+ /* ppgtt PDEs reside in the global gtt pagetable, which has 512*1024
+ * entries. For aliasing ppgtt support we just steal them at the end for
+ * now. */
+ first_pd_entry_in_global_pt = 512*1024 - I915_PPGTT_PD_ENTRIES;
+
+ ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL);
+ if (!ppgtt)
+ return ret;
+
+ ppgtt->num_pd_entries = I915_PPGTT_PD_ENTRIES;
+ ppgtt->pt_pages = kzalloc(sizeof(struct page *)*ppgtt->num_pd_entries,
+ GFP_KERNEL);
+ if (!ppgtt->pt_pages)
+ goto err_ppgtt;
+
+ for (i = 0; i < ppgtt->num_pd_entries; i++) {
+ ppgtt->pt_pages[i] = alloc_page(GFP_KERNEL);
+ if (!ppgtt->pt_pages[i])
+ goto err_pt_alloc;
+ }
+
+ if (dev_priv->mm.gtt->needs_dmar) {
+ ppgtt->pt_dma_addr = kzalloc(sizeof(dma_addr_t)
+ *ppgtt->num_pd_entries,
+ GFP_KERNEL);
+ if (!ppgtt->pt_dma_addr)
+ goto err_pt_alloc;
+ }
+
+ pd_addr = dev_priv->mm.gtt->gtt + first_pd_entry_in_global_pt;
+ for (i = 0; i < ppgtt->num_pd_entries; i++) {
+ dma_addr_t pt_addr;
+ if (dev_priv->mm.gtt->needs_dmar) {
+ pt_addr = pci_map_page(dev->pdev, ppgtt->pt_pages[i],
+ 0, 4096,
+ PCI_DMA_BIDIRECTIONAL);
+
+ if (pci_dma_mapping_error(dev->pdev,
+ pt_addr)) {
+ ret = -EIO;
+ goto err_pd_pin;
+
+ }
+ ppgtt->pt_dma_addr[i] = pt_addr;
+ } else
+ pt_addr = page_to_phys(ppgtt->pt_pages[i]);
+
+ pd_entry = GEN6_PDE_ADDR_ENCODE(pt_addr);
+ pd_entry |= GEN6_PDE_VALID;
+
+ writel(pd_entry, pd_addr + i);
+ }
+ readl(pd_addr);
+
+ ppgtt->scratch_page_dma_addr = dev_priv->mm.gtt->scratch_page_dma;
+
+ i915_ppgtt_clear_range(ppgtt, 0,
+ ppgtt->num_pd_entries*I915_PPGTT_PT_ENTRIES);
+
+ ppgtt->pd_offset = (first_pd_entry_in_global_pt)*sizeof(uint32_t);
+
+ dev_priv->mm.aliasing_ppgtt = ppgtt;
+
+ return 0;
+
+err_pd_pin:
+ if (ppgtt->pt_dma_addr) {
+ for (i--; i >= 0; i--)
+ pci_unmap_page(dev->pdev, ppgtt->pt_dma_addr[i],
+ 4096, PCI_DMA_BIDIRECTIONAL);
+ }
+err_pt_alloc:
+ kfree(ppgtt->pt_dma_addr);
+ for (i = 0; i < ppgtt->num_pd_entries; i++) {
+ if (ppgtt->pt_pages[i])
+ __free_page(ppgtt->pt_pages[i]);
+ }
+ kfree(ppgtt->pt_pages);
+err_ppgtt:
+ kfree(ppgtt);
+
+ return ret;
+}
+
+void i915_gem_cleanup_aliasing_ppgtt(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct i915_hw_ppgtt *ppgtt = dev_priv->mm.aliasing_ppgtt;
+ int i;
+
+ if (!ppgtt)
+ return;
+
+ if (ppgtt->pt_dma_addr) {
+ for (i = 0; i < ppgtt->num_pd_entries; i++)
+ pci_unmap_page(dev->pdev, ppgtt->pt_dma_addr[i],
+ 4096, PCI_DMA_BIDIRECTIONAL);
+ }
+
+ kfree(ppgtt->pt_dma_addr);
+ for (i = 0; i < ppgtt->num_pd_entries; i++)
+ __free_page(ppgtt->pt_pages[i]);
+ kfree(ppgtt->pt_pages);
+ kfree(ppgtt);
+}
+
+static void i915_ppgtt_insert_sg_entries(struct i915_hw_ppgtt *ppgtt,
+ struct scatterlist *sg_list,
+ unsigned sg_len,
+ unsigned first_entry,
+ uint32_t pte_flags)
+{
+ uint32_t *pt_vaddr, pte;
+ unsigned act_pd = first_entry / I915_PPGTT_PT_ENTRIES;
+ unsigned first_pte = first_entry % I915_PPGTT_PT_ENTRIES;
+ unsigned i, j, m, segment_len;
+ dma_addr_t page_addr;
+ struct scatterlist *sg;
+
+ /* init sg walking */
+ sg = sg_list;
+ i = 0;
+ segment_len = sg_dma_len(sg) >> PAGE_SHIFT;
+ m = 0;
+
+ while (i < sg_len) {
+ pt_vaddr = kmap_atomic(ppgtt->pt_pages[act_pd]);
+
+ for (j = first_pte; j < I915_PPGTT_PT_ENTRIES; j++) {
+ page_addr = sg_dma_address(sg) + (m << PAGE_SHIFT);
+ pte = GEN6_PTE_ADDR_ENCODE(page_addr);
+ pt_vaddr[j] = pte | pte_flags;
+
+ /* grab the next page */
+ m++;
+ if (m == segment_len) {
+ sg = sg_next(sg);
+ i++;
+ if (i == sg_len)
+ break;
+
+ segment_len = sg_dma_len(sg) >> PAGE_SHIFT;
+ m = 0;
+ }
+ }
+
+ kunmap_atomic(pt_vaddr);
+
+ first_pte = 0;
+ act_pd++;
+ }
+}
+
+static void i915_ppgtt_insert_pages(struct i915_hw_ppgtt *ppgtt,
+ unsigned first_entry, unsigned num_entries,
+ struct page **pages, uint32_t pte_flags)
+{
+ uint32_t *pt_vaddr, pte;
+ unsigned act_pd = first_entry / I915_PPGTT_PT_ENTRIES;
+ unsigned first_pte = first_entry % I915_PPGTT_PT_ENTRIES;
+ unsigned last_pte, i;
+ dma_addr_t page_addr;
+
+ while (num_entries) {
+ last_pte = first_pte + num_entries;
+ last_pte = min_t(unsigned, last_pte, I915_PPGTT_PT_ENTRIES);
+
+ pt_vaddr = kmap_atomic(ppgtt->pt_pages[act_pd]);
+
+ for (i = first_pte; i < last_pte; i++) {
+ page_addr = page_to_phys(*pages);
+ pte = GEN6_PTE_ADDR_ENCODE(page_addr);
+ pt_vaddr[i] = pte | pte_flags;
+
+ pages++;
+ }
+
+ kunmap_atomic(pt_vaddr);
+
+ num_entries -= last_pte - first_pte;
+ first_pte = 0;
+ act_pd++;
+ }
+}
+
+void i915_ppgtt_bind_object(struct i915_hw_ppgtt *ppgtt,
+ struct drm_i915_gem_object *obj,
+ enum i915_cache_level cache_level)
+{
+ struct drm_device *dev = obj->base.dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ uint32_t pte_flags = GEN6_PTE_VALID;
+
+ switch (cache_level) {
+ case I915_CACHE_LLC_MLC:
+ pte_flags |= GEN6_PTE_CACHE_LLC_MLC;
+ break;
+ case I915_CACHE_LLC:
+ pte_flags |= GEN6_PTE_CACHE_LLC;
+ break;
+ case I915_CACHE_NONE:
+ pte_flags |= GEN6_PTE_UNCACHED;
+ break;
+ default:
+ BUG();
+ }
+
+ if (dev_priv->mm.gtt->needs_dmar) {
+ BUG_ON(!obj->sg_list);
+
+ i915_ppgtt_insert_sg_entries(ppgtt,
+ obj->sg_list,
+ obj->num_sg,
+ obj->gtt_space->start >> PAGE_SHIFT,
+ pte_flags);
+ } else
+ i915_ppgtt_insert_pages(ppgtt,
+ obj->gtt_space->start >> PAGE_SHIFT,
+ obj->base.size >> PAGE_SHIFT,
+ obj->pages,
+ pte_flags);
+}
+
+void i915_ppgtt_unbind_object(struct i915_hw_ppgtt *ppgtt,
+ struct drm_i915_gem_object *obj)
+{
+ i915_ppgtt_clear_range(ppgtt,
+ obj->gtt_space->start >> PAGE_SHIFT,
+ obj->base.size >> PAGE_SHIFT);
+}
+
/* XXX kill agp_type! */
static unsigned int cache_level_to_agp_type(struct drm_device *dev,
enum i915_cache_level cache_level)
@@ -55,7 +328,7 @@ static bool do_idling(struct drm_i915_private *dev_priv)
if (unlikely(dev_priv->mm.gtt->do_idle_maps)) {
dev_priv->mm.interruptible = false;
- if (i915_gpu_idle(dev_priv->dev)) {
+ if (i915_gpu_idle(dev_priv->dev, false)) {
DRM_ERROR("Couldn't idle GPU\n");
/* Wait a bit, in hopes it avoids the hang */
udelay(10);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.