Release 4.10 drivers/gpu/drm/i915/i915_gem_gtt.c

/*
 * Copyright © 2010 Daniel Vetter
 * Copyright © 2011-2014 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 */

#include <linux/seq_file.h>
#include <linux/stop_machine.h>
#include <drm/drmP.h>
#include <drm/i915_drm.h>
#include "i915_drv.h"
#include "i915_vgpu.h"
#include "i915_trace.h"
#include "intel_drv.h"
#include "intel_frontbuffer.h"


#define I915_GFP_DMA (GFP_KERNEL | __GFP_HIGHMEM)

/**
 * DOC: Global GTT views
 *
 * Background and previous state
 *
 * Historically objects could exists (be bound) in global GTT space only as
 * singular instances with a view representing all of the object's backing pages
 * in a linear fashion. This view will be called a normal view.
 *
 * To support multiple views of the same object, where the number of mapped
 * pages is not equal to the backing store, or where the layout of the pages
 * is not linear, concept of a GGTT view was added.
 *
 * One example of an alternative view is a stereo display driven by a single
 * image. In this case we would have a framebuffer looking like this
 * (2x2 pages):
 *
 *    12
 *    34
 *
 * Above would represent a normal GGTT view as normally mapped for GPU or CPU
 * rendering. In contrast, fed to the display engine would be an alternative
 * view which could look something like this:
 *
 *   1212
 *   3434
 *
 * In this example both the size and layout of pages in the alternative view is
 * different from the normal view.
 *
 * Implementation and usage
 *
 * GGTT views are implemented using VMAs and are distinguished via enum
 * i915_ggtt_view_type and struct i915_ggtt_view.
 *
 * A new flavour of core GEM functions which work with GGTT bound objects were
 * added with the _ggtt_ infix, and sometimes with _view postfix to avoid
 * renaming  in large amounts of code. They take the struct i915_ggtt_view
 * parameter encapsulating all metadata required to implement a view.
 *
 * As a helper for callers which are only interested in the normal view,
 * globally const i915_ggtt_view_normal singleton instance exists. All old core
 * GEM API functions, the ones not taking the view parameter, are operating on,
 * or with the normal GGTT view.
 *
 * Code wanting to add or use a new GGTT view needs to:
 *
 * 1. Add a new enum with a suitable name.
 * 2. Extend the metadata in the i915_ggtt_view structure if required.
 * 3. Add support to i915_get_vma_pages().
 *
 * New views are required to build a scatter-gather table from within the
 * i915_get_vma_pages function. This table is stored in the vma.ggtt_view and
 * exists for the lifetime of an VMA.
 *
 * Core API is designed to have copy semantics which means that passed in
 * struct i915_ggtt_view does not need to be persistent (left around after
 * calling the core API functions).
 *
 */

static int
i915_get_ggtt_vma_pages(struct i915_vma *vma);


const struct i915_ggtt_view i915_ggtt_view_normal = {
	.type = I915_GGTT_VIEW_NORMAL,
};

const struct i915_ggtt_view i915_ggtt_view_rotated = {
	.type = I915_GGTT_VIEW_ROTATED,
};



int intel_sanitize_enable_ppgtt(struct drm_i915_private *dev_priv,
			       	int enable_ppgtt)
{
	bool has_aliasing_ppgtt;
	bool has_full_ppgtt;
	bool has_full_48bit_ppgtt;

	has_aliasing_ppgtt = INTEL_GEN(dev_priv) >= 6;
	has_full_ppgtt = INTEL_GEN(dev_priv) >= 7;
	has_full_48bit_ppgtt =
	       	IS_BROADWELL(dev_priv) || INTEL_GEN(dev_priv) >= 9;

	if (intel_vgpu_active(dev_priv)) {
		/* emulation is too hard */
		has_full_ppgtt = false;
		has_full_48bit_ppgtt = false;
	}

	if (!has_aliasing_ppgtt)
		return 0;

	/*
         * We don't allow disabling PPGTT for gen9+ as it's a requirement for
         * execlists, the sole mechanism available to submit work.
         */
	if (enable_ppgtt == 0 && INTEL_GEN(dev_priv) < 9)
		return 0;

	if (enable_ppgtt == 1)
		return 1;

	if (enable_ppgtt == 2 && has_full_ppgtt)
		return 2;

	if (enable_ppgtt == 3 && has_full_48bit_ppgtt)
		return 3;

#ifdef CONFIG_INTEL_IOMMU
	/* Disable ppgtt on SNB if VT-d is on. */
	if (IS_GEN6(dev_priv) && intel_iommu_gfx_mapped) {
		DRM_INFO("Disabling PPGTT because VT-d is on\n");
		return 0;
	}
#endif

	/* Early VLV doesn't have this */
	if (IS_VALLEYVIEW(dev_priv) && dev_priv->drm.pdev->revision < 0xb) {
		DRM_DEBUG_DRIVER("disabling PPGTT on pre-B3 step VLV\n");
		return 0;
	}

	if (INTEL_GEN(dev_priv) >= 8 && i915.enable_execlists && has_full_ppgtt)
		return has_full_48bit_ppgtt ? 3 : 2;
	else
		return has_aliasing_ppgtt ? 1 : 0;
}

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jesse barnes
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yu zhang
yu zhang
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zhi wang
zhi wang
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damien lespiau
damien lespiau
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static int ppgtt_bind_vma(struct i915_vma *vma,
			  enum i915_cache_level cache_level,
			  u32 unused)
{
	u32 pte_flags = 0;

	vma->pages = vma->obj->mm.pages;

	/* Currently applicable only to VLV */
	if (vma->obj->gt_ro)
		pte_flags |= PTE_READ_ONLY;

	vma->vm->insert_entries(vma->vm, vma->pages, vma->node.start,
				cache_level, pte_flags);

	return 0;
}

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daniel vetter
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chris wilson
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static void ppgtt_unbind_vma(struct i915_vma *vma)
{
	vma->vm->clear_range(vma->vm,
			     vma->node.start,
			     vma->size);
}

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static gen8_pte_t gen8_pte_encode(dma_addr_t addr,
				  enum i915_cache_level level)
{
	gen8_pte_t pte = _PAGE_PRESENT | _PAGE_RW;
	pte |= addr;

	switch (level) {
	case I915_CACHE_NONE:
		pte |= PPAT_UNCACHED_INDEX;
		break;
	case I915_CACHE_WT:
		pte |= PPAT_DISPLAY_ELLC_INDEX;
		break;
	default:
		pte |= PPAT_CACHED_INDEX;
		break;
	}

	return pte;
}

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ben widawsky
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static gen8_pde_t gen8_pde_encode(const dma_addr_t addr,
				  const enum i915_cache_level level)
{
	gen8_pde_t pde = _PAGE_PRESENT | _PAGE_RW;
	pde |= addr;
	if (level != I915_CACHE_NONE)
		pde |= PPAT_CACHED_PDE_INDEX;
	else
		pde |= PPAT_UNCACHED_INDEX;
	return pde;
}

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ben widawsky
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#define gen8_pdpe_encode gen8_pde_encode

#define gen8_pml4e_encode gen8_pde_encode



static gen6_pte_t snb_pte_encode(dma_addr_t addr,
				 enum i915_cache_level level,
				 u32 unused)
{
	gen6_pte_t pte = GEN6_PTE_VALID;
	pte |= GEN6_PTE_ADDR_ENCODE(addr);

	switch (level) {
	case I915_CACHE_L3_LLC:
	case I915_CACHE_LLC:
		pte |= GEN6_PTE_CACHE_LLC;
		break;
	case I915_CACHE_NONE:
		pte |= GEN6_PTE_UNCACHED;
		break;
	default:
		MISSING_CASE(level);
	}

	return pte;
}

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ben widawsky
ben widawsky
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chris wilson
chris wilson
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1
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michel thierry
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akash goel
akash goel
2
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daniel vetter
daniel vetter
2
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1
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7
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static gen6_pte_t ivb_pte_encode(dma_addr_t addr,
				 enum i915_cache_level level,
				 u32 unused)
{
	gen6_pte_t pte = GEN6_PTE_VALID;
	pte |= GEN6_PTE_ADDR_ENCODE(addr);

	switch (level) {
	case I915_CACHE_L3_LLC:
		pte |= GEN7_PTE_CACHE_L3_LLC;
		break;
	case I915_CACHE_LLC:
		pte |= GEN6_PTE_CACHE_LLC;
		break;
	case I915_CACHE_NONE:
		pte |= GEN6_PTE_UNCACHED;
		break;
	default:
		MISSING_CASE(level);
	}

	return pte;
}

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chris wilson
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ben widawsky
ben widawsky
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akash goel
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daniel vetter
daniel vetter
2
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1
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michel thierry
michel thierry
2
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static gen6_pte_t byt_pte_encode(dma_addr_t addr,
				 enum i915_cache_level level,
				 u32 flags)
{
	gen6_pte_t pte = GEN6_PTE_VALID;
	pte |= GEN6_PTE_ADDR_ENCODE(addr);

	if (!(flags & PTE_READ_ONLY))
		pte |= BYT_PTE_WRITEABLE;

	if (level != I915_CACHE_NONE)
		pte |= BYT_PTE_SNOOPED_BY_CPU_CACHES;

	return pte;
}

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kenneth graunke
kenneth graunke
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akash goel
akash goel
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michel thierry
michel thierry
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ben widawsky
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1
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static gen6_pte_t hsw_pte_encode(dma_addr_t addr,
				 enum i915_cache_level level,
				 u32 unused)
{
	gen6_pte_t pte = GEN6_PTE_VALID;
	pte |= HSW_PTE_ADDR_ENCODE(addr);

	if (level != I915_CACHE_NONE)
		pte |= HSW_WB_LLC_AGE3;

	return pte;
}

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kenneth graunke
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ben widawsky
ben widawsky
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michel thierry
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akash goel
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static gen6_pte_t iris_pte_encode(dma_addr_t addr,
				  enum i915_cache_level level,
				  u32 unused)
{
	gen6_pte_t pte = GEN6_PTE_VALID;
	pte |= HSW_PTE_ADDR_ENCODE(addr);

	switch (level) {
	case I915_CACHE_NONE:
		break;
	case I915_CACHE_WT:
		pte |= HSW_WT_ELLC_LLC_AGE3;
		break;
	default:
		pte |= HSW_WB_ELLC_LLC_AGE3;
		break;
	}

	return pte;
}

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ben widawsky
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chris wilson
chris wilson
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michel thierry
michel thierry
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akash goel
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static int __setup_page_dma(struct drm_i915_private *dev_priv,
			    struct i915_page_dma *p, gfp_t flags)
{
	struct device *kdev = &dev_priv->drm.pdev->dev;

	p->page = alloc_page(flags);
	if (!p->page)
		return -ENOMEM;

	p->daddr = dma_map_page(kdev,
				p->page, 0, 4096, PCI_DMA_BIDIRECTIONAL);

	if (dma_mapping_error(kdev, p->daddr)) {
		__free_page(p->page);
		return -EINVAL;
	}

	return 0;
}

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ben widawsky
ben widawsky
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mika kuoppala
mika kuoppala
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2
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michel thierry
michel thierry
8
8.08%
1
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tvrtko ursulin
tvrtko ursulin
5
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1
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david weinehall
david weinehall
3
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static int setup_page_dma(struct drm_i915_private *dev_priv,
			  struct i915_page_dma *p)
{
	return __setup_page_dma(dev_priv, p, I915_GFP_DMA);
}

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mika kuoppala
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chris wilson
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static void cleanup_page_dma(struct drm_i915_private *dev_priv,
			     struct i915_page_dma *p)
{
	struct pci_dev *pdev = dev_priv->drm.pdev;

	if (WARN_ON(!p->page))
		return;

	dma_unmap_page(&pdev->dev, p->daddr, 4096, PCI_DMA_BIDIRECTIONAL);
	__free_page(p->page);
	memset(p, 0, sizeof(*p));
}

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mika kuoppala
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ben widawsky
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david weinehall
david weinehall
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static void *kmap_page_dma(struct i915_page_dma *p)
{
	return kmap_atomic(p->page);
}

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/* We use the flushing unmap only with ppgtt structures:
 * page directories, page tables and scratch pages.
 */


static void kunmap_page_dma(struct drm_i915_private *dev_priv, void *vaddr)
{
	/* There are only few exceptions for gen >=6. chv and bxt.
         * And we are not sure about the latter so play safe for now.
         */
	if (IS_CHERRYVIEW(dev_priv) || IS_BROXTON(dev_priv))
		drm_clflush_virt_range(vaddr, PAGE_SIZE);

	kunmap_atomic(vaddr);
}

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#define kmap_px(px) kmap_page_dma(px_base(px))

#define kunmap_px(ppgtt, vaddr) \
		kunmap_page_dma(to_i915((ppgtt)->base.dev), (vaddr))


#define setup_px(dev_priv, px) setup_page_dma((dev_priv), px_base(px))

#define cleanup_px(dev_priv, px) cleanup_page_dma((dev_priv), px_base(px))

#define fill_px(dev_priv, px, v) fill_page_dma((dev_priv), px_base(px), (v))

#define fill32_px(dev_priv, px, v) \
		fill_page_dma_32((dev_priv), px_base(px), (v))



static void fill_page_dma(struct drm_i915_private *dev_priv,
			  struct i915_page_dma *p, const uint64_t val)
{
	int i;
	uint64_t * const vaddr = kmap_page_dma(p);

	for (i = 0; i < 512; i++)
		vaddr[i] = val;

	kunmap_page_dma(dev_priv, vaddr);
}

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mika kuoppala
mika kuoppala
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static void fill_page_dma_32(struct drm_i915_private *dev_priv,
			     struct i915_page_dma *p, const uint32_t val32)
{
	uint64_t v = val32;

	v = v << 32 | val32;

	fill_page_dma(dev_priv, p, v);
}

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mika kuoppala
mika kuoppala
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static int

setup_scratch_page(struct drm_i915_private *dev_priv,
		   struct i915_page_dma *scratch,
		   gfp_t gfp)
{
	return __setup_page_dma(dev_priv, scratch, gfp | __GFP_ZERO);
}

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mika kuoppala
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static void cleanup_scratch_page(struct drm_i915_private *dev_priv,
				 struct i915_page_dma *scratch)
{
	cleanup_page_dma(dev_priv, scratch);
}

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mika kuoppala
mika kuoppala
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static struct i915_page_table *alloc_pt(struct drm_i915_private *dev_priv)
{
	struct i915_page_table *pt;
	const size_t count = INTEL_GEN(dev_priv) >= 8 ? GEN8_PTES : GEN6_PTES;
	int ret = -ENOMEM;

	pt = kzalloc(sizeof(*pt), GFP_KERNEL);
	if (!pt)
		return ERR_PTR(-ENOMEM);

	pt->used_ptes = kcalloc(BITS_TO_LONGS(count), sizeof(*pt->used_ptes),
				GFP_KERNEL);

	if (!pt->used_ptes)
		goto fail_bitmap;

	ret = setup_px(dev_priv, pt);
	if (ret)
		goto fail_page_m;

	return pt;

fail_page_m:
	kfree(pt->used_ptes);
fail_bitmap:
	kfree(pt);

	return ERR_PTR(ret);
}

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mika kuoppala
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static void free_pt(struct drm_i915_private *dev_priv,
		    struct i915_page_table *pt)
{
	cleanup_px(dev_priv, pt);
	kfree(pt->used_ptes);
	kfree(pt);
}

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static void gen8_initialize_pt(struct i915_address_space *vm,
			       struct i915_page_table *pt)
{
	gen8_pte_t scratch_pte;

	scratch_pte = gen8_pte_encode(vm->scratch_page.daddr,
				      I915_CACHE_LLC);

	fill_px(to_i915(vm->dev), pt, scratch_pte);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
36
78.26%
1
16.67%
mika kuoppala
mika kuoppala
5
10.87%
3
50.00%
tvrtko ursulin
tvrtko ursulin
3
6.52%
1
16.67%
chris wilson
chris wilson
2
4.35%
1
16.67%
Total
46
100.00%
6
100.00%



static void gen6_initialize_pt(struct i915_address_space *vm,
			       struct i915_page_table *pt)
{
	gen6_pte_t scratch_pte;

	WARN_ON(vm->scratch_page.daddr == 0);

	scratch_pte = vm->pte_encode(vm->scratch_page.daddr,
				     I915_CACHE_LLC, 0);

	fill32_px(to_i915(vm->dev), pt, scratch_pte);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
mika kuoppala
mika kuoppala
50
81.97%
1
20.00%
chris wilson
chris wilson
4
6.56%
1
20.00%
ben widawsky
ben widawsky
3
4.92%
1
20.00%
tvrtko ursulin
tvrtko ursulin
3
4.92%
1
20.00%
michel thierry
michel thierry
1
1.64%
1
20.00%
Total
61
100.00%
5
100.00%



static struct i915_page_directory *alloc_pd(struct drm_i915_private *dev_priv)
{
	struct i915_page_directory *pd;
	int ret = -ENOMEM;

	pd = kzalloc(sizeof(*pd), GFP_KERNEL);
	if (!pd)
		return ERR_PTR(-ENOMEM);

	pd->used_pdes = kcalloc(BITS_TO_LONGS(I915_PDES),
				sizeof(*pd->used_pdes), GFP_KERNEL);
	if (!pd->used_pdes)
		goto fail_bitmap;

	ret = setup_px(dev_priv, pd);
	if (ret)
		goto fail_page_m;

	return pd;

fail_page_m:
	kfree(pd->used_pdes);
fail_bitmap:
	kfree(pd);

	return ERR_PTR(ret);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
91
74.59%
2
28.57%
mika kuoppala
mika kuoppala
26
21.31%
3
42.86%
tvrtko ursulin
tvrtko ursulin
3
2.46%
1
14.29%
michel thierry
michel thierry
2
1.64%
1
14.29%
Total
122
100.00%
7
100.00%



static void free_pd(struct drm_i915_private *dev_priv,
		    struct i915_page_directory *pd)
{
	if (px_page(pd)) {
		cleanup_px(dev_priv, pd);
		kfree(pd->used_pdes);
		kfree(pd);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
22
50.00%
1
14.29%
michel thierry
michel thierry
11
25.00%
2
28.57%
mika kuoppala
mika kuoppala
8
18.18%
3
42.86%
tvrtko ursulin
tvrtko ursulin
3
6.82%
1
14.29%
Total
44
100.00%
7
100.00%



static void gen8_initialize_pd(struct i915_address_space *vm,
			       struct i915_page_directory *pd)
{
	gen8_pde_t scratch_pde;

	scratch_pde = gen8_pde_encode(px_dma(vm->scratch_pt), I915_CACHE_LLC);

	fill_px(to_i915(vm->dev), pd, scratch_pde);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
mika kuoppala
mika kuoppala
40
85.11%
1
25.00%
tvrtko ursulin
tvrtko ursulin
3
6.38%
1
25.00%
ben widawsky
ben widawsky
3
6.38%
1
25.00%
michel thierry
michel thierry
1
2.13%
1
25.00%
Total
47
100.00%
4
100.00%



static int __pdp_init(struct drm_i915_private *dev_priv,
		      struct i915_page_directory_pointer *pdp)
{
	size_t pdpes = I915_PDPES_PER_PDP(dev_priv);

	pdp->used_pdpes = kcalloc(BITS_TO_LONGS(pdpes),
				  sizeof(unsigned long),
				  GFP_KERNEL);
	if (!pdp->used_pdpes)
		return -ENOMEM;

	pdp->page_directory = kcalloc(pdpes, sizeof(*pdp->page_directory),
				      GFP_KERNEL);
	if (!pdp->page_directory) {
		kfree(pdp->used_pdpes);
		/* the PDP might be the statically allocated top level. Keep it
                 * as clean as possible */
		pdp->used_pdpes = NULL;
		return -ENOMEM;
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
101
97.12%
1
50.00%
tvrtko ursulin
tvrtko ursulin
3
2.88%
1
50.00%
Total
104
100.00%
2
100.00%



static void __pdp_fini(struct i915_page_directory_pointer *pdp)
{
	kfree(pdp->used_pdpes);
	kfree(pdp->page_directory);
	pdp->page_directory = NULL;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
31
100.00%
1
100.00%
Total
31
100.00%
1
100.00%


static struct

i915_page_directory_pointer *alloc_pdp(struct drm_i915_private *dev_priv)
{
	struct i915_page_directory_pointer *pdp;
	int ret = -ENOMEM;

	WARN_ON(!USES_FULL_48BIT_PPGTT(dev_priv));

	pdp = kzalloc(sizeof(*pdp), GFP_KERNEL);
	if (!pdp)
		return ERR_PTR(-ENOMEM);

	ret = __pdp_init(dev_priv, pdp);
	if (ret)
		goto fail_bitmap;

	ret = setup_px(dev_priv, pdp);
	if (ret)
		goto fail_page_m;

	return pdp;

fail_page_m:
	__pdp_fini(pdp);
fail_bitmap:
	kfree(pdp);

	return ERR_PTR(ret);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
68
60.18%
2
18.18%
ben widawsky
ben widawsky
23
20.35%
3
27.27%
daniel vetter
daniel vetter
13
11.50%
3
27.27%
tvrtko ursulin
tvrtko ursulin
5
4.42%
1
9.09%
john harrison
john harrison
3
2.65%
1
9.09%
imre deak
imre deak
1
0.88%
1
9.09%
Total
113
100.00%
11
100.00%



static void free_pdp(struct drm_i915_private *dev_priv,
		     struct i915_page_directory_pointer *pdp)
{
	__pdp_fini(pdp);
	if (USES_FULL_48BIT_PPGTT(dev_priv)) {
		cleanup_px(dev_priv, pdp);
		kfree(pdp);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
28
66.67%
1
33.33%
ben widawsky
ben widawsky
10
23.81%
1
33.33%
tvrtko ursulin
tvrtko ursulin
4
9.52%
1
33.33%
Total
42
100.00%
3
100.00%



static void gen8_initialize_pdp(struct i915_address_space *vm,
				struct i915_page_directory_pointer *pdp)
{
	gen8_ppgtt_pdpe_t scratch_pdpe;

	scratch_pdpe = gen8_pdpe_encode(px_dma(vm->scratch_pd), I915_CACHE_LLC);

	fill_px(to_i915(vm->dev), pdp, scratch_pdpe);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
44
93.62%
1
50.00%
tvrtko ursulin
tvrtko ursulin
3
6.38%
1
50.00%
Total
47
100.00%
2
100.00%



static void gen8_initialize_pml4(struct i915_address_space *vm,
				 struct i915_pml4 *pml4)
{
	gen8_ppgtt_pml4e_t scratch_pml4e;

	scratch_pml4e = gen8_pml4e_encode(px_dma(vm->scratch_pdp),
					  I915_CACHE_LLC);

	fill_px(to_i915(vm->dev), pml4, scratch_pml4e);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
44
93.62%
1
50.00%
tvrtko ursulin
tvrtko ursulin
3
6.38%
1
50.00%
Total
47
100.00%
2
100.00%


static void

gen8_setup_page_directory(struct i915_hw_ppgtt *ppgtt,
			  struct i915_page_directory_pointer *pdp,
			  struct i915_page_directory *pd,
			  int index)
{
	gen8_ppgtt_pdpe_t *page_directorypo;

	if (!USES_FULL_48BIT_PPGTT(to_i915(ppgtt->base.dev)))
		return;

	page_directorypo = kmap_px(pdp);
	page_directorypo[index] = gen8_pdpe_encode(px_dma(pd), I915_CACHE_LLC);
	kunmap_px(ppgtt, page_directorypo);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
57
78.08%
2
28.57%
ben widawsky
ben widawsky
12
16.44%
3
42.86%
tvrtko ursulin
tvrtko ursulin
3
4.11%
1
14.29%
mika kuoppala
mika kuoppala
1
1.37%
1
14.29%
Total
73
100.00%
7
100.00%


static void

gen8_setup_page_directory_pointer(struct i915_hw_ppgtt *ppgtt,
				  struct i915_pml4 *pml4,
				  struct i915_page_directory_pointer *pdp,
				  int index)
{
	gen8_ppgtt_pml4e_t *pagemap = kmap_px(pml4);

	WARN_ON(!USES_FULL_48BIT_PPGTT(to_i915(ppgtt->base.dev)));
	pagemap[index] = gen8_pml4e_encode(px_dma(pdp), I915_CACHE_LLC);
	kunmap_px(ppgtt, pagemap);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
68
95.77%
1
50.00%
tvrtko ursulin
tvrtko ursulin
3
4.23%
1
50.00%
Total
71
100.00%
2
100.00%

/* Broadwell Page Directory Pointer Descriptors */


static int gen8_write_pdp(struct drm_i915_gem_request *req,
			  unsigned entry,
			  dma_addr_t addr)
{
	struct intel_ring *ring = req->ring;
	struct intel_engine_cs *engine = req->engine;
	int ret;

	BUG_ON(entry >= 4);

	ret = intel_ring_begin(req, 6);
	if (ret)
		return ret;

	intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1));
	intel_ring_emit_reg(ring, GEN8_RING_PDP_UDW(engine, entry));
	intel_ring_emit(ring, upper_32_bits(addr));
	intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1));
	intel_ring_emit_reg(ring, GEN8_RING_PDP_LDW(engine, entry));
	intel_ring_emit(ring, lower_32_bits(addr));
	intel_ring_advance(ring);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
111
83.46%
1
14.29%
chris wilson
chris wilson
16
12.03%
3
42.86%
tvrtko ursulin
tvrtko ursulin
4
3.01%
2
28.57%
ville syrjala
ville syrjala
2
1.50%
1
14.29%
Total
133
100.00%
7
100.00%



static int gen8_legacy_mm_switch(struct i915_hw_ppgtt *ppgtt,
				 struct drm_i915_gem_request *req)
{
	int i, ret;

	for (i = GEN8_LEGACY_PDPES - 1; i >= 0; i--) {
		const dma_addr_t pd_daddr = i915_page_dir_dma_addr(ppgtt, i);

		ret = gen8_write_pdp(req, i, pd_daddr);
		if (ret)
			return ret;
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
46
65.71%
3
27.27%
ben widawsky
ben widawsky
14
20.00%
4
36.36%
ville syrjala
ville syrjala
8
11.43%
2
18.18%
mika kuoppala
mika kuoppala
1
1.43%
1
9.09%
john harrison
john harrison
1
1.43%
1
9.09%
Total
70
100.00%
11
100.00%



static int gen8_48b_mm_switch(struct i915_hw_ppgtt *ppgtt,
			      struct drm_i915_gem_request *req)
{
	return gen8_write_pdp(req, 0, px_dma(&ppgtt->pml4));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
32
100.00%
1
100.00%
Total
32
100.00%
1
100.00%

/* PDE TLBs are a pain to invalidate on GEN8+. When we modify
 * the page table structures, we mark them dirty so that
 * context switching/execlist queuing code takes extra steps
 * to ensure that tlbs are flushed.
 */


static void mark_tlbs_dirty(struct i915_hw_ppgtt *ppgtt)
{
	ppgtt->pd_dirty_rings = INTEL_INFO(to_i915(ppgtt->base.dev))->ring_mask;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
mika kuoppala
mika kuoppala
26
89.66%
1
50.00%
tvrtko ursulin
tvrtko ursulin
3
10.34%
1
50.00%
Total
29
100.00%
2
100.00%

/* Removes entries from a single page table, releasing it if it's empty.
 * Caller can use the return value to update higher-level entries.
 */


static bool gen8_ppgtt_clear_pt(struct i915_address_space *vm,
				struct i915_page_table *pt,
				uint64_t start,
				uint64_t length)
{
	struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
	unsigned int num_entries = gen8_pte_count(start, length);
	unsigned int pte = gen8_pte_index(start);
	unsigned int pte_end = pte + num_entries;
	gen8_pte_t *pt_vaddr;
	gen8_pte_t scratch_pte = gen8_pte_encode(vm->scratch_page.daddr,
						 I915_CACHE_LLC);

	if (WARN_ON(!px_page(pt)))
		return false;

	GEM_BUG_ON(pte_end > GEN8_PTES);

	bitmap_clear(pt->used_ptes, pte, num_entries);

	if (bitmap_empty(pt->used_ptes, GEN8_PTES)) {
		free_pt(to_i915(vm->dev), pt);
		return true;
	}

	pt_vaddr = kmap_px(pt);

	while (pte < pte_end)
		pt_vaddr[pte++] = scratch_pte;

	kunmap_px(ppgtt, pt_vaddr);

	return false;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michal winiarski
michal winiarski
61
36.09%
2
10.53%
ben widawsky
ben widawsky
43
25.44%
6
31.58%
mika kuoppala
mika kuoppala
31
18.34%
3
15.79%
daniel vetter
daniel vetter
19
11.24%
2
10.53%
michel thierry
michel thierry
7
4.14%
2
10.53%
tvrtko ursulin
tvrtko ursulin
3
1.78%
1
5.26%
rafael barbalho
rafael barbalho
3
1.78%
1
5.26%
joonas lahtinen
joonas lahtinen
1
0.59%
1
5.26%
matthew auld
matthew auld
1
0.59%
1
5.26%
Total
169
100.00%
19
100.00%

/* Removes entries from a single page dir, releasing it if it's empty.
 * Caller can use the return value to update higher-level entries
 */


static bool gen8_ppgtt_clear_pd(struct i915_address_space *vm,
				struct i915_page_directory *pd,
				uint64_t start,
				uint64_t length)
{
	struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
	struct i915_page_table *pt;
	uint64_t pde;
	gen8_pde_t *pde_vaddr;
	gen8_pde_t scratch_pde = gen8_pde_encode(px_dma(vm->scratch_pt),
						 I915_CACHE_LLC);

	gen8_for_each_pde(pt, pd, start, length, pde) {
		if (WARN_ON(!pd->page_table[pde]))
			break;

		if (gen8_ppgtt_clear_pt(vm, pt, start, length)) {
			__clear_bit(pde, pd->used_pdes);
			pde_vaddr = kmap_px(pd);
			pde_vaddr[pde] = scratch_pde;
			kunmap_px(ppgtt, pde_vaddr);
		}
	}

	if (bitmap_empty(pd->used_pdes, I915_PDES)) {
		free_pd(to_i915(vm->dev), pd);
		return true;
	}

	return false;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michal winiarski
michal winiarski
148
90.80%
2
33.33%
michel thierry
michel thierry
7
4.29%
1
16.67%
ben widawsky
ben widawsky
5
3.07%
2
33.33%
tvrtko ursulin
tvrtko ursulin
3
1.84%
1
16.67%
Total
163
100.00%
6
100.00%

/* Removes entries from a single page dir pointer, releasing it if it's empty.
 * Caller can use the return value to update higher-level entries
 */


static bool gen8_ppgtt_clear_pdp(struct i915_address_space *vm,
				 struct i915_page_directory_pointer *pdp,
				 uint64_t start,
				 uint64_t length)
{
	struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
	struct drm_i915_private *dev_priv = to_i915(vm->dev);
	struct i915_page_directory *pd;
	uint64_t pdpe;
	gen8_ppgtt_pdpe_t *pdpe_vaddr;
	gen8_ppgtt_pdpe_t scratch_pdpe =
		gen8_pdpe_encode(px_dma(vm->scratch_pd), I915_CACHE_LLC);

	gen8_for_each_pdpe(pd, pdp, start, length, pdpe) {
		if (WARN_ON(!pdp->page_directory[pdpe]))
			break;

		if (gen8_ppgtt_clear_pd(vm, pd, start, length)) {
			__clear_bit(pdpe, pdp->used_pdpes);
			if (USES_FULL_48BIT_PPGTT(dev_priv)) {
				pdpe_vaddr = kmap_px(pdp);
				pdpe_vaddr[pdpe] = scratch_pdpe;
				kunmap_px(ppgtt, pdpe_vaddr);
			}
		}
	}

	mark_tlbs_dirty(ppgtt);

	if (USES_FULL_48BIT_PPGTT(dev_priv) &&
	    bitmap_empty(pdp->used_pdpes, I915_PDPES_PER_PDP(dev_priv))) {
		free_pdp(dev_priv, pdp);
		return true;
	}

	return false;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michal winiarski
michal winiarski
135
70.31%
2
20.00%
michel thierry
michel thierry
21
10.94%
2
20.00%
tvrtko ursulin
tvrtko ursulin
16
8.33%
1
10.00%
ben widawsky
ben widawsky
14
7.29%
3
30.00%
mika kuoppala
mika kuoppala
5
2.60%
1
10.00%
daniel vetter
daniel vetter
1
0.52%
1
10.00%
Total
192
100.00%
10
100.00%

/* Removes entries from a single pml4.
 * This is the top-level structure in 4-level page tables used on gen8+.
 * Empty entries are always scratch pml4e.
 */


static void gen8_ppgtt_clear_pml4(struct i915_address_space *vm,
				  struct i915_pml4 *pml4,
				  uint64_t start,
				  uint64_t length)
{
	struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
	struct i915_page_directory_pointer *pdp;
	uint64_t pml4e;
	gen8_ppgtt_pml4e_t *pml4e_vaddr;
	gen8_ppgtt_pml4e_t scratch_pml4e =
		gen8_pml4e_encode(px_dma(vm->scratch_pdp), I915_CACHE_LLC);

	GEM_BUG_ON(!USES_FULL_48BIT_PPGTT(to_i915(vm->dev)));

	gen8_for_each_pml4e(pdp, pml4, start, length, pml4e) {
		if (WARN_ON(!pml4->pdps[pml4e]))
			break;

		if (gen8_ppgtt_clear_pdp(vm, pdp, start, length)) {
			__clear_bit(pml4e, pml4->used_pml4es);
			pml4e_vaddr = kmap_px(pml4);
			pml4e_vaddr[pml4e] = scratch_pml4e;
			kunmap_px(ppgtt, pml4e_vaddr);
		}
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michal winiarski
michal winiarski
113
77.40%
2
50.00%
michel thierry
michel thierry
30
20.55%
1
25.00%
tvrtko ursulin
tvrtko ursulin
3
2.05%
1
25.00%
Total
146
100.00%
4
100.00%



static void gen8_ppgtt_clear_range(struct i915_address_space *vm,
				   uint64_t start, uint64_t length)
{
	struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);

	if (USES_FULL_48BIT_PPGTT(to_i915(vm->dev)))
		gen8_ppgtt_clear_pml4(vm, &ppgtt->pml4, start, length);
	else
		gen8_ppgtt_clear_pdp(vm, &ppgtt->pdp, start, length);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michal winiarski
michal winiarski
64
94.12%
1
33.33%
tvrtko ursulin
tvrtko ursulin
3
4.41%
1
33.33%
michel thierry
michel thierry
1
1.47%
1
33.33%
Total
68
100.00%
3
100.00%


static void

gen8_ppgtt_insert_pte_entries(struct i915_address_space *vm,
			      struct i915_page_directory_pointer *pdp,
			      struct sg_page_iter *sg_iter,
			      uint64_t start,
			      enum i915_cache_level cache_level)
{
	struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
	gen8_pte_t *pt_vaddr;
	unsigned pdpe = gen8_pdpe_index(start);
	unsigned pde = gen8_pde_index(start);
	unsigned pte = gen8_pte_index(start);

	pt_vaddr = NULL;

	while (__sg_page_iter_next(sg_iter)) {
		if (pt_vaddr == NULL) {
			struct i915_page_directory *pd = pdp->page_directory[pdpe];
			struct i915_page_table *pt = pd->page_table[pde];
			pt_vaddr = kmap_px(pt);
		}

		pt_vaddr[pte] =
			gen8_pte_encode(sg_page_iter_dma_address(sg_iter),
					cache_level);
		if (++pte == GEN8_PTES) {
			kunmap_px(ppgtt, pt_vaddr);
			pt_vaddr = NULL;
			if (++pde == I915_PDES) {
				if (++pdpe == I915_PDPES_PER_PDP(to_i915(vm->dev)))
					break;
				pde = 0;
			}
			pte = 0;
		}
	}

	if (pt_vaddr)
		kunmap_px(ppgtt, pt_vaddr);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
74
37.56%
7
33.33%
ben widawsky
ben widawsky
68
34.52%
6
28.57%
mika kuoppala
mika kuoppala
20
10.15%
3
14.29%
chris wilson
chris wilson
16
8.12%
1
4.76%
daniel vetter
daniel vetter
12
6.09%
1
4.76%
rafael barbalho
rafael barbalho
3
1.52%
1
4.76%
tvrtko ursulin
tvrtko ursulin
3
1.52%
1
4.76%
joonas lahtinen
joonas lahtinen
1
0.51%
1
4.76%
Total
197
100.00%
21
100.00%



static void gen8_ppgtt_insert_entries(struct i915_address_space *vm,
				      struct sg_table *pages,
				      uint64_t start,
				      enum i915_cache_level cache_level,
				      u32 unused)
{
	struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
	struct sg_page_iter sg_iter;

	__sg_page_iter_start(&sg_iter, pages->sgl, sg_nents(pages->sgl), 0);

	if (!USES_FULL_48BIT_PPGTT(to_i915(vm->dev))) {
		gen8_ppgtt_insert_pte_entries(vm, &ppgtt->pdp, &sg_iter, start,
					      cache_level);
	} else {
		struct i915_page_directory_pointer *pdp;
		uint64_t pml4e;
		uint64_t length = (uint64_t)pages->orig_nents << PAGE_SHIFT;

		gen8_for_each_pml4e(pdp, &ppgtt->pml4, start, length, pml4e) {
			gen8_ppgtt_insert_pte_entries(vm, pdp, &sg_iter,
						      start, cache_level);
		}
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
138
97.18%
3
60.00%
tvrtko ursulin
tvrtko ursulin
3
2.11%
1
20.00%
joonas lahtinen
joonas lahtinen
1
0.70%
1
20.00%
Total
142
100.00%
5
100.00%



static void gen8_free_page_tables(struct drm_i915_private *dev_priv,
				  struct i915_page_directory *pd)
{
	int i;

	if (!px_page(pd))
		return;

	for_each_set_bit(i, pd->used_pdes, I915_PDES) {
		if (WARN_ON(!pd->page_table[i]))
			continue;

		free_pt(dev_priv, pd->page_table[i]);
		pd->page_table[i] = NULL;
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
52
71.23%
3
33.33%
michel thierry
michel thierry
13
17.81%
3
33.33%
mika kuoppala
mika kuoppala
5
6.85%
2
22.22%
tvrtko ursulin
tvrtko ursulin
3
4.11%
1
11.11%
Total
73
100.00%
9
100.00%



static int gen8_init_scratch(struct i915_address_space *vm)
{
	struct drm_i915_private *dev_priv = to_i915(vm->dev);
	int ret;

	ret = setup_scratch_page(dev_priv, &vm->scratch_page, I915_GFP_DMA);
	if (ret)
		return ret;

	vm->scratch_pt = alloc_pt(dev_priv);
	if (IS_ERR(vm->scratch_pt)) {
		ret = PTR_ERR(vm->scratch_pt);
		goto free_scratch_page;
	}

	vm->scratch_pd = alloc_pd(dev_priv);
	if (IS_ERR(vm->scratch_pd)) {
		ret = PTR_ERR(vm->scratch_pd);
		goto free_pt;
	}

	if (USES_FULL_48BIT_PPGTT(dev_priv)) {
		vm->scratch_pdp = alloc_pdp(dev_priv);
		if (IS_ERR(vm->scratch_pdp)) {
			ret = PTR_ERR(vm->scratch_pdp);
			goto free_pd;
		}
	}

	gen8_initialize_pt(vm, vm->scratch_pt);
	gen8_initialize_pd(vm, vm->scratch_pd);
	if (USES_FULL_48BIT_PPGTT(dev_priv))
		gen8_initialize_pdp(vm, vm->scratch_pdp);

	return 0;

free_pd:
	free_pd(dev_priv, vm->scratch_pd);
free_pt:
	free_pt(dev_priv, vm->scratch_pt);
free_scratch_page:
	cleanup_scratch_page(dev_priv, &vm->scratch_page);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
mika kuoppala
mika kuoppala
98
43.36%
1
16.67%
matthew auld
matthew auld
53
23.45%
1
16.67%
michel thierry
michel thierry
48
21.24%
1
16.67%
tvrtko ursulin
tvrtko ursulin
14
6.19%
1
16.67%
chris wilson
chris wilson
13
5.75%
2
33.33%
Total
226
100.00%
6
100.00%



static int gen8_ppgtt_notify_vgt(struct i915_hw_ppgtt *ppgtt, bool create)
{
	enum vgt_g2v_type msg;
	struct drm_i915_private *dev_priv = to_i915(ppgtt->base.dev);
	int i;

	if (USES_FULL_48BIT_PPGTT(dev_priv)) {
		u64 daddr = px_dma(&ppgtt->pml4);

		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_LEGACY_PDPES; i++) {
			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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
zhiyuan lv
zhiyuan lv
146
77.66%
1
33.33%
ville syrjala
ville syrjala
36
19.15%
1
33.33%
matthew auld
matthew auld
6
3.19%
1
33.33%
Total
188
100.00%
3
100.00%



static void gen8_free_scratch(struct i915_address_space *vm)
{
	struct drm_i915_private *dev_priv = to_i915(vm->dev);

	if (USES_FULL_48BIT_PPGTT(dev_priv))
		free_pdp(dev_priv, vm->scratch_pdp);
	free_pd(dev_priv, vm->scratch_pd);
	free_pt(dev_priv, vm->scratch_pt);
	cleanup_scratch_page(dev_priv, &vm->scratch_page);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
33
49.25%
2
40.00%
mika kuoppala
mika kuoppala
22
32.84%
1
20.00%
tvrtko ursulin
tvrtko ursulin
10
14.93%
1
20.00%
chris wilson
chris wilson
2
2.99%
1
20.00%
Total
67
100.00%
5
100.00%



static void gen8_ppgtt_cleanup_3lvl(struct drm_i915_private *dev_priv,
				    struct i915_page_directory_pointer *pdp)
{
	int i;

	for_each_set_bit(i, pdp->used_pdpes, I915_PDPES_PER_PDP(dev_priv)) {
		if (WARN_ON(!pdp->page_directory[i]))
			continue;

		gen8_free_page_tables(dev_priv, pdp->page_directory[i]);
		free_pd(dev_priv, pdp->page_directory[i]);
	}

	free_pdp(dev_priv, pdp);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
68
91.89%
1
50.00%
tvrtko ursulin
tvrtko ursulin
6
8.11%
1
50.00%
Total
74
100.00%
2
100.00%



static void gen8_ppgtt_cleanup_4lvl(struct i915_hw_ppgtt *ppgtt)
{
	struct drm_i915_private *dev_priv = to_i915(ppgtt->base.dev);
	int i;

	for_each_set_bit(i, ppgtt->pml4.used_pml4es, GEN8_PML4ES_PER_PML4) {
		if (WARN_ON(!ppgtt->pml4.pdps[i]))
			continue;

		gen8_ppgtt_cleanup_3lvl(dev_priv, ppgtt->pml4.pdps[i]);
	}

	cleanup_px(dev_priv, &ppgtt->pml4);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
50
64.10%
1
33.33%
tvrtko ursulin
tvrtko ursulin
16
20.51%
1
33.33%
mika kuoppala
mika kuoppala
12
15.38%
1
33.33%
Total
78
100.00%
3
100.00%



static void gen8_ppgtt_cleanup(struct i915_address_space *vm)
{
	struct drm_i915_private *dev_priv = to_i915(vm->dev);
	struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);

	if (intel_vgpu_active(dev_priv))
		gen8_ppgtt_notify_vgt(ppgtt, false);

	if (!USES_FULL_48BIT_PPGTT(dev_priv))
		gen8_ppgtt_cleanup_3lvl(dev_priv, &ppgtt->pdp);
	else
		gen8_ppgtt_cleanup_4lvl(ppgtt);

	gen8_free_scratch(vm);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
19
25.00%
5
27.78%
tvrtko ursulin
tvrtko ursulin
15
19.74%
1
5.56%
ben widawsky
ben widawsky
13
17.11%
5
27.78%
zhiyuan lv
zhiyuan lv
12
15.79%
1
5.56%
daniel vetter
daniel vetter
12
15.79%
1
5.56%
mika kuoppala
mika kuoppala
3
3.95%
3
16.67%
joonas lahtinen
joonas lahtinen
1
1.32%
1
5.56%
chris wilson
chris wilson
1
1.32%
1
5.56%
Total
76
100.00%
18
100.00%

/**
 * gen8_ppgtt_alloc_pagetabs() - Allocate page tables for VA range.
 * @vm: Master vm structure.
 * @pd: Page directory for this address range.
 * @start:      Starting virtual address to begin allocations.
 * @length:     Size of the allocations.
 * @new_pts:    Bitmap set by function with new allocations. Likely used by the
 *              caller to free on error.
 *
 * Allocate the required number of page tables. Extremely similar to
 * gen8_ppgtt_alloc_page_directories(). The main difference is here we are limited by
 * the page directory boundary (instead of the page directory pointer). That
 * boundary is 1GB virtual. Therefore, unlike gen8_ppgtt_alloc_page_directories(), it is
 * possible, and likely that the caller will need to use multiple calls of this
 * function to achieve the appropriate allocation.
 *
 * Return: 0 if success; negative error code otherwise.
 */


static int gen8_ppgtt_alloc_pagetabs(struct i915_address_space *vm,
				     struct i915_page_directory *pd,
				     uint64_t start,
				     uint64_t length,
				     unsigned long *new_pts)
{
	struct drm_i915_private *dev_priv = to_i915(vm->dev);
	struct i915_page_table *pt;
	uint32_t pde;

	gen8_for_each_pde(pt, pd, start, length, pde) {
		/* Don't reallocate page tables */
		if (test_bit(pde, pd->used_pdes)) {
			/* Scratch is never allocated this way */
			WARN_ON(pt == vm->scratch_pt);
			continue;
		}

		pt = alloc_pt(dev_priv);
		if (IS_ERR(pt))
			goto unwind_out;

		gen8_initialize_pt(vm, pt);
		pd->page_table[pde] = pt;
		__set_bit(pde, new_pts);
		trace_i915_page_table_entry_alloc(vm, pde, start, GEN8_PDE_SHIFT);
	}

	return 0;

unwind_out:
	for_each_set_bit(pde, new_pts, I915_PDES)
		free_pt(dev_priv, pd->page_table[pde]);

	return -ENOMEM;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
127
76.51%
6
42.86%
ben widawsky
ben widawsky
28
16.87%
4
28.57%
tvrtko ursulin
tvrtko ursulin
7
4.22%
1
7.14%
mika kuoppala
mika kuoppala
4
2.41%
3
21.43%
Total
166
100.00%
14
100.00%

/**
 * gen8_ppgtt_alloc_page_directories() - Allocate page directories for VA range.
 * @vm: Master vm structure.
 * @pdp:        Page directory pointer for this address range.
 * @start:      Starting virtual address to begin allocations.
 * @length:     Size of the allocations.
 * @new_pds:    Bitmap set by function with new allocations. Likely used by the
 *              caller to free on error.
 *
 * Allocate the required number of page directories starting at the pde index of
 * @start, and ending at the pde index @start + @length. This function will skip
 * over already allocated page directories within the range, and only allocate
 * new ones, setting the appropriate pointer within the pdp as well as the
 * correct position in the bitmap @new_pds.
 *
 * The function will only allocate the pages within the range for a give page
 * directory pointer. In other words, if @start + @length straddles a virtually
 * addressed PDP boundary (512GB for 4k pages), there will be more allocations
 * required by the caller, This is not currently possible, and the BUG in the
 * code will prevent it.
 *
 * Return: 0 if success; negative error code otherwise.
 */

static int

gen8_ppgtt_alloc_page_directories(struct i915_address_space *vm,
				  struct i915_page_directory_pointer *pdp,
				  uint64_t start,
				  uint64_t length,
				  unsigned long *new_pds)
{
	struct drm_i915_private *dev_priv = to_i915(vm->dev);
	struct i915_page_directory *pd;
	uint32_t pdpe;
	uint32_t pdpes = I915_PDPES_PER_PDP(dev_priv);

	WARN_ON(!bitmap_empty(new_pds, pdpes));

	gen8_for_each_pdpe(pd, pdp, start, length, pdpe) {
		if (test_bit(pdpe, pdp->used_pdpes))
			continue;

		pd = alloc_pd(dev_priv);
		if (IS_ERR(pd))
			goto unwind_out;

		gen8_initialize_pd(vm, pd);
		pdp->page_directory[pdpe] = pd;
		__set_bit(pdpe, new_pds);
		trace_i915_page_directory_entry_alloc(vm, pdpe, start, GEN8_PDPE_SHIFT);
	}

	return 0;

unwind_out:
	for_each_set_bit(pdpe, new_pds, pdpes)
		free_pd(dev_priv, pdp->page_directory[pdpe]);

	return -ENOMEM;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
153
88.95%
7
53.85%
ben widawsky
ben widawsky
9
5.23%
3
23.08%
tvrtko ursulin
tvrtko ursulin
8
4.65%
1
7.69%
mika kuoppala
mika kuoppala
2
1.16%
2
15.38%
Total
172
100.00%
13
100.00%

/**
 * gen8_ppgtt_alloc_page_dirpointers() - Allocate pdps for VA range.
 * @vm: Master vm structure.
 * @pml4:       Page map level 4 for this address range.
 * @start:      Starting virtual address to begin allocations.
 * @length:     Size of the allocations.
 * @new_pdps:   Bitmap set by function with new allocations. Likely used by the
 *              caller to free on error.
 *
 * Allocate the required number of page directory pointers. Extremely similar to
 * gen8_ppgtt_alloc_page_directories() and gen8_ppgtt_alloc_pagetabs().
 * The main difference is here we are limited by the pml4 boundary (instead of
 * the page directory pointer).
 *
 * Return: 0 if success; negative error code otherwise.
 */

static int

gen8_ppgtt_alloc_page_dirpointers(struct i915_address_space *vm,
				  struct i915_pml4 *pml4,
				  uint64_t start,
				  uint64_t length,
				  unsigned long *new_pdps)
{
	struct drm_i915_private *dev_priv = to_i915(vm->dev);
	struct i915_page_directory_pointer *pdp;
	uint32_t pml4e;

	WARN_ON(!bitmap_empty(new_pdps, GEN8_PML4ES_PER_PML4));

	gen8_for_each_pml4e(pdp, pml4, start, length, pml4e) {
		if (!test_bit(pml4e, pml4->used_pml4es)) {
			pdp = alloc_pdp(dev_priv);
			if (IS_ERR(pdp))
				goto unwind_out;

			gen8_initialize_pdp(vm, pdp);
			pml4->pdps[pml4e] = pdp;
			__set_bit(pml4e, new_pdps);
			trace_i915_page_directory_pointer_entry_alloc(vm,
								      pml4e,
								      start,
								      GEN8_PML4E_SHIFT);
		}
	}

	return 0;

unwind_out:
	for_each_set_bit(pml4e, new_pdps, GEN8_PML4ES_PER_PML4)
		free_pdp(dev_priv, pml4->pdps[pml4e]);

	return -ENOMEM;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
148
89.16%
7
63.64%
ben widawsky
ben widawsky
10
6.02%
2
18.18%
tvrtko ursulin
tvrtko ursulin
7
4.22%
1
9.09%
mika kuoppala
mika kuoppala
1
0.60%
1
9.09%
Total
166
100.00%
11
100.00%


static void

free_gen8_temp_bitmaps(unsigned long *new_pds, unsigned long *new_pts)
{
	kfree(new_pts);
	kfree(new_pds);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
21
80.77%
2
66.67%
ben widawsky
ben widawsky
5
19.23%
1
33.33%
Total
26
100.00%
3
100.00%

/* Fills in the page directory bitmap, and the array of page tables bitmap. Both
 * of these are based on the number of PDPEs in the system.
 */

static

int __must_check alloc_gen8_temp_bitmaps(unsigned long **new_pds,
					 unsigned long **new_pts,
					 uint32_t pdpes)
{
	unsigned long *pds;
	unsigned long *pts;

	pds = kcalloc(BITS_TO_LONGS(pdpes), sizeof(unsigned long), GFP_TEMPORARY);
	if (!pds)
		return -ENOMEM;

	pts = kcalloc(pdpes, BITS_TO_LONGS(I915_PDES) * sizeof(unsigned long),
		      GFP_TEMPORARY);
	if (!pts)
		goto err_out;

	*new_pds = pds;
	*new_pts = pts;

	return 0;

err_out:
	free_gen8_temp_bitmaps(pds, pts);
	return -ENOMEM;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
110
97.35%
2
66.67%
michal winiarski
michal winiarski
3
2.65%
1
33.33%
Total
113
100.00%
3
100.00%



static int gen8_alloc_va_range_3lvl(struct i915_address_space *vm,
				    struct i915_page_directory_pointer *pdp,
				    uint64_t start,
				    uint64_t length)
{
	struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
	unsigned long *new_page_dirs, *new_page_tables;
	struct drm_i915_private *dev_priv = to_i915(vm->dev);
	struct i915_page_directory *pd;
	const uint64_t orig_start = start;
	const uint64_t orig_length = length;
	uint32_t pdpe;
	uint32_t pdpes = I915_PDPES_PER_PDP(dev_priv);
	int ret;

	/* Wrap is never okay since we can only represent 48b, and we don't
         * actually use the other side of the canonical address space.
         */
	if (WARN_ON(start + length < start))
		return -ENODEV;

	if (WARN_ON(start + length > vm->total))
		return -ENODEV;

	ret = alloc_gen8_temp_bitmaps(&new_page_dirs, &new_page_tables, pdpes);
	if (ret)
		return ret;

	/* Do the allocations first so we can easily bail out */
	ret = gen8_ppgtt_alloc_page_directories(vm, pdp, start, length,
						new_page_dirs);
	if (ret) {
		free_gen8_temp_bitmaps(new_page_dirs, new_page_tables);
		return ret;
	}

	/* For every page directory referenced, allocate page tables */
	gen8_for_each_pdpe(pd, pdp, start, length, pdpe) {
		ret = gen8_ppgtt_alloc_pagetabs(vm, pd, start, length,
						new_page_tables + pdpe * BITS_TO_LONGS(I915_PDES));
		if (ret)
			goto err_out;
	}

	start = orig_start;
	length = orig_length;

	/* Allocations have completed successfully, so set the bitmaps, and do
         * the mappings. */
	gen8_for_each_pdpe(pd, pdp, start, length, pdpe) {
		gen8_pde_t *const page_directory = kmap_px(pd);
		struct i915_page_table *pt;
		uint64_t pd_len = length;
		uint64_t pd_start = start;
		uint32_t pde;

		/* Every pd should be allocated, we just did that above. */
		WARN_ON(!pd);

		gen8_for_each_pde(pt, pd, pd_start, pd_len, pde) {
			/* Same reasoning as pd */
			WARN_ON(!pt);
			WARN_ON(!pd_len);
			WARN_ON(!gen8_pte_count(pd_start, pd_len));

			/* Set our used ptes within the page table */
			bitmap_set(pt->used_ptes,
				   gen8_pte_index(pd_start),
				   gen8_pte_count(pd_start, pd_len));

			/* Our pde is now pointing to the pagetable, pt */
			__set_bit(pde, pd->used_pdes);

			/* Map the PDE to the page table */
			page_directory[pde] = gen8_pde_encode(px_dma(pt),
							      I915_CACHE_LLC);
			trace_i915_page_table_entry_map(&ppgtt->base, pde, pt,
							gen8_pte_index(start),
							gen8_pte_count(start, length),
							GEN8_PTES);

			/* NB: We haven't yet mapped ptes to pages. At this
                         * point we're still relying on insert_entries() */
		}

		kunmap_px(ppgtt, page_directory);
		__set_bit(pdpe, pdp->used_pdpes);
		gen8_setup_page_directory(ppgtt, pdp, pd, pdpe);
	}

	free_gen8_temp_bitmaps(new_page_dirs, new_page_tables);
	mark_tlbs_dirty(ppgtt);
	return 0;

err_out:
	while (pdpe--) {
		unsigned long temp;

		for_each_set_bit(temp, new_page_tables + pdpe *
                                BITS_TO_LONGS(I915_PDES), I915_PDES)
			free_pt(dev_priv,
				pdp->page_directory[pdpe]->page_table[temp]);
	}

	for_each_set_bit(pdpe, new_page_dirs, pdpes)
		free_pd(dev_priv, pdp->page_directory[pdpe]);

	free_gen8_temp_bitmaps(new_page_dirs, new_page_tables);
	mark_tlbs_dirty(ppgtt);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
438
88.31%
9
52.94%
mika kuoppala
mika kuoppala
19
3.83%
3
17.65%
ben widawsky
ben widawsky
19
3.83%
1
5.88%
tvrtko ursulin
tvrtko ursulin
8
1.61%
1
5.88%
michal winiarski
michal winiarski
7
1.41%
1
5.88%
dave gordon
dave gordon
4
0.81%
1
5.88%
joonas lahtinen
joonas lahtinen
1
0.20%
1
5.88%
Total
496
100.00%
17
100.00%



static int gen8_alloc_va_range_4lvl(struct i915_address_space *vm,
				    struct i915_pml4 *pml4,
				    uint64_t start,
				    uint64_t length)
{
	DECLARE_BITMAP(new_pdps, GEN8_PML4ES_PER_PML4);
	struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
	struct i915_page_directory_pointer *pdp;
	uint64_t pml4e;
	int ret = 0;

	/* Do the pml4 allocations first, so we don't need to track the newly
         * allocated tables below the pdp */
	bitmap_zero(new_pdps, GEN8_PML4ES_PER_PML4);

	/* The pagedirectory and pagetable allocations are done in the shared 3
         * and 4 level code. Just allocate the pdps.
         */
	ret = gen8_ppgtt_alloc_page_dirpointers(vm, pml4, start, length,
						new_pdps);
	if (ret)
		return ret;

	WARN(bitmap_weight(new_pdps, GEN8_PML4ES_PER_PML4) > 2,
	     "The allocation has spanned more than 512GB. "
	     "It is highly likely this is incorrect.");

	gen8_for_each_pml4e(pdp, pml4, start, length, pml4e) {
		WARN_ON(!pdp);

		ret = gen8_alloc_va_range_3lvl(vm, pdp, start, length);
		if (ret)
			goto err_out;

		gen8_setup_page_directory_pointer(ppgtt, pml4, pdp, pml4e);
	}

	bitmap_or(pml4->used_pml4es, new_pdps, pml4->used_pml4es,
		  GEN8_PML4ES_PER_PML4);

	return 0;

err_out:
	for_each_set_bit(pml4e, new_pdps, GEN8_PML4ES_PER_PML4)
		gen8_ppgtt_cleanup_3lvl(to_i915(vm->dev), pml4->pdps[pml4e]);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
180
91.37%
5
41.67%
mika kuoppala
mika kuoppala
8
4.06%
4
33.33%
ben widawsky
ben widawsky
5
2.54%
1
8.33%
tvrtko ursulin
tvrtko ursulin
3
1.52%
1
8.33%
joonas lahtinen
joonas lahtinen
1
0.51%
1
8.33%
Total
197
100.00%
12
100.00%



static int gen8_alloc_va_range(struct i915_address_space *vm,
			       uint64_t start, uint64_t length)
{
	struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);

	if (USES_FULL_48BIT_PPGTT(to_i915(vm->dev)))
		return gen8_alloc_va_range_4lvl(vm, &ppgtt->pml4, start, length);
	else
		return gen8_alloc_va_range_3lvl(vm, &ppgtt->pdp, start, length);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
59
84.29%
4
50.00%
ben widawsky
ben widawsky
4
5.71%
1
12.50%
mika kuoppala
mika kuoppala
3
4.29%
1
12.50%
tvrtko ursulin
tvrtko ursulin
3
4.29%
1
12.50%
joonas lahtinen
joonas lahtinen
1
1.43%
1
12.50%
Total
70
100.00%
8
100.00%



static void gen8_dump_pdp(struct i915_page_directory_pointer *pdp,
			  uint64_t start, uint64_t length,
			  gen8_pte_t scratch_pte,
			  struct seq_file *m)
{
	struct i915_page_directory *pd;
	uint32_t pdpe;

	gen8_for_each_pdpe(pd, pdp, start, length, pdpe) {
		struct i915_page_table *pt;
		uint64_t pd_len = length;
		uint64_t pd_start = start;
		uint32_t pde;

		if (!test_bit(pdpe, pdp->used_pdpes))
			continue;

		seq_printf(m, "\tPDPE #%d\n", pdpe);
		gen8_for_each_pde(pt, pd, pd_start, pd_len, pde) {
			uint32_t  pte;
			gen8_pte_t *pt_vaddr;

			if (!test_bit(pde, pd->used_pdes))
				continue;

			pt_vaddr = kmap_px(pt);
			for (pte = 0; pte < GEN8_PTES; pte += 4) {
				uint64_t va =
					(pdpe << GEN8_PDPE_SHIFT) |
					(pde << GEN8_PDE_SHIFT) |
					(pte << GEN8_PTE_SHIFT);
				int i;
				bool found = false;

				for (i = 0; i < 4; i++)
					if (pt_vaddr[pte + i] != scratch_pte)
						found = true;
				if (!found)
					continue;

				seq_printf(m, "\t\t0x%llx [%03d,%03d,%04d]: =", va, pdpe, pde, pte);
				for (i = 0; i < 4; i++) {
					if (pt_vaddr[pte + i] != scratch_pte)
						seq_printf(m, " %llx", pt_vaddr[pte + i]);
					else
						seq_puts(m, "  SCRATCH ");
				}
				seq_puts(m, "\n");
			}
			/* don't use kunmap_px, it could trigger
                         * an unnecessary flush.
                         */
			kunmap_atomic(pt_vaddr);
		}
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
283
100.00%
1
100.00%
Total
283
100.00%
1
100.00%



static void gen8_dump_ppgtt(struct i915_hw_ppgtt *ppgtt, struct seq_file *m)
{
	struct i915_address_space *vm = &ppgtt->base;
	uint64_t start = ppgtt->base.start;
	uint64_t length = ppgtt->base.total;
	gen8_pte_t scratch_pte = gen8_pte_encode(vm->scratch_page.daddr,
						 I915_CACHE_LLC);

	if (!USES_FULL_48BIT_PPGTT(to_i915(vm->dev))) {
		gen8_dump_pdp(&ppgtt->pdp, start, length, scratch_pte, m);
	} else {
		uint64_t pml4e;
		struct i915_pml4 *pml4 = &ppgtt->pml4;
		struct i915_page_directory_pointer *pdp;

		gen8_for_each_pml4e(pdp, pml4, start, length, pml4e) {
			if (!test_bit(pml4e, pml4->used_pml4es))
				continue;

			seq_printf(m, "    PML4E #%llu\n", pml4e);
			gen8_dump_pdp(pdp, start, length, scratch_pte, m);
		}
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
154
96.86%
1
33.33%
tvrtko ursulin
tvrtko ursulin
3
1.89%
1
33.33%
chris wilson
chris wilson
2
1.26%
1
33.33%
Total
159
100.00%
3
100.00%



static int gen8_preallocate_top_level_pdps(struct i915_hw_ppgtt *ppgtt)
{
	unsigned long *new_page_dirs, *new_page_tables;
	uint32_t pdpes = I915_PDPES_PER_PDP(to_i915(ppgtt->base.dev));
	int ret;

	/* We allocate temp bitmap for page tables for no gain
         * but as this is for init only, lets keep the things simple
         */
	ret = alloc_gen8_temp_bitmaps(&new_page_dirs, &new_page_tables, pdpes);
	if (ret)
		return ret;

	/* Allocate for all pdps regardless of how the ppgtt
         * was defined.
         */
	ret = gen8_ppgtt_alloc_page_directories(&ppgtt->base, &ppgtt->pdp,
						0, 1ULL << 32,
						new_page_dirs);
	if (!ret)
		*ppgtt->pdp.used_pdpes = *new_page_dirs;

	free_gen8_temp_bitmaps(new_page_dirs, new_page_tables);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
zhiyuan lv
zhiyuan lv
100
93.46%
1
50.00%
tvrtko ursulin
tvrtko ursulin
7
6.54%
1
50.00%
Total
107
100.00%
2
100.00%

/*
 * GEN8 legacy ppgtt programming is accomplished through a max 4 PDP registers
 * with a net effect resembling a 2-level page table in normal x86 terms. Each
 * PDP represents 1GB of memory 4 * 512 * 512 * 4096 = 4GB legacy 32b address
 * space.
 *
 */


static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
{
	struct drm_i915_private *dev_priv = to_i915(ppgtt->base.dev);
	int ret;

	ret = gen8_init_scratch(&ppgtt->base);
	if (ret)
		return ret;

	ppgtt->base.start = 0;
	ppgtt->base.cleanup = gen8_ppgtt_cleanup;
	ppgtt->base.allocate_va_range = gen8_alloc_va_range;
	ppgtt->base.insert_entries = gen8_ppgtt_insert_entries;
	ppgtt->base.clear_range = gen8_ppgtt_clear_range;
	ppgtt->base.unbind_vma = ppgtt_unbind_vma;
	ppgtt->base.bind_vma = ppgtt_bind_vma;
	ppgtt->debug_dump = gen8_dump_ppgtt;

	if (USES_FULL_48BIT_PPGTT(dev_priv)) {
		ret = setup_px(dev_priv, &ppgtt->pml4);
		if (ret)
			goto free_scratch;

		gen8_initialize_pml4(&ppgtt->base, &ppgtt->pml4);

		ppgtt->base.total = 1ULL << 48;
		ppgtt->switch_mm = gen8_48b_mm_switch;
	} else {
		ret = __pdp_init(dev_priv, &ppgtt->pdp);
		if (ret)
			goto free_scratch;

		ppgtt->base.total = 1ULL << 32;
		ppgtt->switch_mm = gen8_legacy_mm_switch;
		trace_i915_page_directory_pointer_entry_alloc(&ppgtt->base,
							      0, 0,
							      GEN8_PML4E_SHIFT);

		if (intel_vgpu_active(dev_priv)) {
			ret = gen8_preallocate_top_level_pdps(ppgtt);
			if (ret)
				goto free_scratch;
		}
	}

	if (intel_vgpu_active(dev_priv))
		gen8_ppgtt_notify_vgt(ppgtt, true);

	return 0;

free_scratch:
	gen8_free_scratch(&ppgtt->base);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
164
60.97%
10
47.62%
zhiyuan lv
zhiyuan lv
33
12.27%
2
9.52%
daniel vetter
daniel vetter
20
7.43%
2
9.52%
tvrtko ursulin
tvrtko ursulin
19
7.06%
1
4.76%
mika kuoppala
mika kuoppala
18
6.69%
1
4.76%
ben widawsky
ben widawsky
9
3.35%
3
14.29%
rafael barbalho
rafael barbalho
4
1.49%
1
4.76%
chris wilson
chris wilson
2
0.74%
1
4.76%
Total
269
100.00%
21
100.00%



static void gen6_dump_ppgtt(struct i915_hw_ppgtt *ppgtt, struct seq_file *m)
{
	struct i915_address_space *vm = &ppgtt->base;
	struct i915_page_table *unused;
	gen6_pte_t scratch_pte;
	uint32_t pd_entry;
	uint32_t  pte, pde;
	uint32_t start = ppgtt->base.start, length = ppgtt->base.total;

	scratch_pte = vm->pte_encode(vm->scratch_page.daddr,
				     I915_CACHE_LLC, 0);

	gen6_for_each_pde(unused, &ppgtt->pd, start, length, pde) {
		u32 expected;
		gen6_pte_t *pt_vaddr;
		const dma_addr_t pt_addr = px_dma(ppgtt->pd.page_table[pde]);
		pd_entry = readl(ppgtt->pd_addr + pde);
		expected = (GEN6_PDE_ADDR_ENCODE(pt_addr) | GEN6_PDE_VALID);

		if (pd_entry != expected)
			seq_printf(m, "\tPDE #%d mismatch: Actual PDE: %x Expected PDE: %x\n",
				   pde,
				   pd_entry,
				   expected);
		seq_printf(m, "\tPDE: %x\n", pd_entry);

		pt_vaddr = kmap_px(ppgtt->pd.page_table[pde]);

		for (pte = 0; pte < GEN6_PTES; pte+=4) {
			unsigned long va =
				(pde * PAGE_SIZE * GEN6_PTES) +
				(pte * PAGE_SIZE);
			int i;
			bool found = false;
			for (i = 0; i < 4; i++)
				if (pt_vaddr[pte + i] != scratch_pte)
					found = true;
			if (!found)
				continue;

			seq_printf(m, "\t\t0x%lx [%03d,%04d]: =", va, pde, pte);
			for (i = 0; i < 4; i++) {
				if (pt_vaddr[pte + i] != scratch_pte)
					seq_printf(m, " %08x", pt_vaddr[pte + i]);
				else
					seq_puts(m, "  SCRATCH ");
			}
			seq_puts(m, "\n");
		}
		kunmap_px(ppgtt, pt_vaddr);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
264
80.49%
7
41.18%
michel thierry
michel thierry
33
10.06%
2
11.76%
daniel vetter
daniel vetter
18
5.49%
2
11.76%
mika kuoppala
mika kuoppala
9
2.74%
3
17.65%
chris wilson
chris wilson
2
0.61%
1
5.88%
akash goel
akash goel
1
0.30%
1
5.88%
imre deak
imre deak
1
0.30%
1
5.88%
Total
328
100.00%
17
100.00%

/* Write pde (index) from the page directory @pd to the page table @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 =
		container_of(pd, struct i915_hw_ppgtt, pd);
	u32 pd_entry;

	pd_entry = GEN6_PDE_ADDR_ENCODE(px_dma(pt));
	pd_entry |= GEN6_PDE_VALID;

	writel(pd_entry, ppgtt->pd_addr + pde);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
55
85.94%
4
44.44%
daniel vetter
daniel vetter
3
4.69%
2
22.22%
mika kuoppala
mika kuoppala
3
4.69%
1
11.11%
michel thierry
michel thierry
2
3.12%
1
11.11%
imre deak
imre deak
1
1.56%
1
11.11%
Total
64
100.00%
9
100.00%

/* 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 *pd,
				  uint32_t start, uint32_t length)
{
	struct i915_ggtt *ggtt = &dev_priv->ggtt;
	struct i915_page_table *pt;
	uint32_t pde;

	gen6_for_each_pde(pt, pd, start, length, pde)
		gen6_write_pde(pd, pde, pt);

	/* Make sure write is complete before other code can use this page
         * table. Also require for WC mapped PTEs */
	readl(ggtt->gsm);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
52
75.36%
2
33.33%
joonas lahtinen
joonas lahtinen
12
17.39%
2
33.33%
daniel vetter
daniel vetter
3
4.35%
1
16.67%
michel thierry
michel thierry
2
2.90%
1
16.67%
Total
69
100.00%
6
100.00%



static uint32_t get_pd_offset(struct i915_hw_ppgtt *ppgtt)
{
	BUG_ON(ppgtt->pd.base.ggtt_offset & 0x3f);

	return (ppgtt->pd.base.ggtt_offset / 64) << 16;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
33
84.62%
3
75.00%
mika kuoppala
mika kuoppala
6
15.38%
1
25.00%
Total
39
100.00%
4
100.00%



static int hsw_mm_switch(struct i915_hw_ppgtt *ppgtt,
			 struct drm_i915_gem_request *req)
{
	struct intel_ring *ring = req->ring;
	struct intel_engine_cs *engine = req->engine;
	int ret;

	/* NB: TLBs must be flushed and invalidated before a switch */
	ret = engine->emit_flush(req, EMIT_INVALIDATE | EMIT_FLUSH);
	if (ret)
		return ret;

	ret = intel_ring_begin(req, 6);
	if (ret)
		return ret;

	intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(2));
	intel_ring_emit_reg(ring, RING_PP_DIR_DCLV(engine));
	intel_ring_emit(ring, PP_DIR_DCLV_2G);
	intel_ring_emit_reg(ring, RING_PP_DIR_BASE(engine));
	intel_ring_emit(ring, get_pd_offset(ppgtt));
	intel_ring_emit(ring, MI_NOOP);
	intel_ring_advance(ring);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
95
69.85%
3
18.75%
chris wilson
chris wilson
20
14.71%
5
31.25%
john harrison
john harrison
11
8.09%
3
18.75%
tvrtko ursulin
tvrtko ursulin
5
3.68%
2
12.50%
daniel vetter
daniel vetter
3
2.21%
2
12.50%
ville syrjala
ville syrjala
2
1.47%
1
6.25%
Total
136
100.00%
16
100.00%



static int gen7_mm_switch(struct i915_hw_ppgtt *ppgtt,
			  struct drm_i915_gem_request *req)
{
	struct intel_ring *ring = req->ring;
	struct intel_engine_cs *engine = req->engine;
	int ret;

	/* NB: TLBs must be flushed and invalidated before a switch */
	ret = engine->emit_flush(req, EMIT_INVALIDATE | EMIT_FLUSH);
	if (ret)
		return ret;

	ret = intel_ring_begin(req, 6);
	if (ret)
		return ret;

	intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(2));
	intel_ring_emit_reg(ring, RING_PP_DIR_DCLV(engine));
	intel_ring_emit(ring, PP_DIR_DCLV_2G);
	intel_ring_emit_reg(ring, RING_PP_DIR_BASE(engine));
	intel_ring_emit(ring, get_pd_offset(ppgtt));
	intel_ring_emit(ring, MI_NOOP);
	intel_ring_advance(ring);

	/* XXX: RCS is the only one to auto invalidate the TLBs? */
	if (engine->id != RCS) {
		ret = engine->emit_flush(req, EMIT_INVALIDATE | EMIT_FLUSH);
		if (ret)
			return ret;
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
122
73.05%
2
15.38%
chris wilson
chris wilson
24
14.37%
5
38.46%
john harrison
john harrison
12
7.19%
3
23.08%
tvrtko ursulin
tvrtko ursulin
7
4.19%
2
15.38%
ville syrjala
ville syrjala
2
1.20%
1
7.69%
Total
167
100.00%
13
100.00%



static int gen6_mm_switch(struct i915_hw_ppgtt *ppgtt,
			  struct drm_i915_gem_request *req)
{
	struct intel_engine_cs *engine = req->engine;
	struct drm_i915_private *dev_priv = req->i915;

	I915_WRITE(RING_PP_DIR_DCLV(engine), PP_DIR_DCLV_2G);
	I915_WRITE(RING_PP_DIR_BASE(engine), get_pd_offset(ppgtt));
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
44
73.33%
1
20.00%
john harrison
john harrison
9
15.00%
1
20.00%
tvrtko ursulin
tvrtko ursulin
4
6.67%
2
40.00%
chris wilson
chris wilson
3
5.00%
1
20.00%
Total
60
100.00%
5
100.00%



static void gen8_ppgtt_enable(struct drm_i915_private *dev_priv)
{
	struct intel_engine_cs *engine;
	enum intel_engine_id id;

	for_each_engine(engine, dev_priv, id) {
		u32 four_level = USES_FULL_48BIT_PPGTT(dev_priv) ?
				 GEN8_GFX_PPGTT_48B : 0;
		I915_WRITE(RING_MODE_GEN7(engine),
			   _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE | four_level));
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
29
50.88%
1
12.50%
michel thierry
michel thierry
13
22.81%
1
12.50%
tvrtko ursulin
tvrtko ursulin
7
12.28%
3
37.50%
akash goel
akash goel
6
10.53%
1
12.50%
daniel vetter
daniel vetter
1
1.75%
1
12.50%
oscar mateo
oscar mateo
1
1.75%
1
12.50%
Total
57
100.00%
8
100.00%



static void gen7_ppgtt_enable(struct drm_i915_private *dev_priv)
{
	struct intel_engine_cs *engine;
	uint32_t ecochk, ecobits;
	enum intel_engine_id id;

	ecobits = I915_READ(GAC_ECO_BITS);
	I915_WRITE(GAC_ECO_BITS, ecobits | ECOBITS_PPGTT_CACHE64B);

	ecochk = I915_READ(GAM_ECOCHK);
	if (IS_HASWELL(dev_priv)) {
		ecochk |= ECOCHK_PPGTT_WB_HSW;
	} else {
		ecochk |= ECOCHK_PPGTT_LLC_IVB;
		ecochk &= ~ECOCHK_PPGTT_GFDT_IVB;
	}
	I915_WRITE(GAM_ECOCHK, ecochk);

	for_each_engine(engine, dev_priv, id) {
		/* GFX_MODE is per-ring on gen7+ */
		I915_WRITE(RING_MODE_GEN7(engine),
			   _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE));
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
75
72.12%
6
37.50%
daniel vetter
daniel vetter
14
13.46%
3
18.75%
tvrtko ursulin
tvrtko ursulin
7
6.73%
4
25.00%
akash goel
akash goel
6
5.77%
1
6.25%
oscar mateo
oscar mateo
1
0.96%
1
6.25%
jani nikula
jani nikula
1
0.96%
1
6.25%
Total
104
100.00%
16
100.00%



static void gen6_ppgtt_enable(struct drm_i915_private *dev_priv)
{
	uint32_t ecochk, gab_ctl, ecobits;

	ecobits = I915_READ(GAC_ECO_BITS);
	I915_WRITE(GAC_ECO_BITS, ecobits | ECOBITS_SNB_BIT |
		   ECOBITS_PPGTT_CACHE64B);

	gab_ctl = I915_READ(GAB_CTL);
	I915_WRITE(GAB_CTL, gab_ctl | GAB_CTL_CONT_AFTER_PAGEFAULT);

	ecochk = I915_READ(GAM_ECOCHK);
	I915_WRITE(GAM_ECOCHK, ecochk | ECOCHK_SNB_BIT | ECOCHK_PPGTT_CACHE64B);

	I915_WRITE(GFX_MODE, _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
59
73.75%
5
45.45%
daniel vetter
daniel vetter
16
20.00%
3
27.27%
tvrtko ursulin
tvrtko ursulin
2
2.50%
1
9.09%
ville syrjala
ville syrjala
2
2.50%
1
9.09%
jani nikula
jani nikula
1
1.25%
1
9.09%
Total
80
100.00%
11
100.00%

/* PPGTT support for Sandybdrige/Gen6 and later */


static void gen6_ppgtt_clear_range(struct i915_address_space *vm,
				   uint64_t start,
				   uint64_t length)
{
	struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
	gen6_pte_t *pt_vaddr, scratch_pte;
	unsigned first_entry = start >> PAGE_SHIFT;
	unsigned num_entries = length >> PAGE_SHIFT;
	unsigned act_pt = first_entry / GEN6_PTES;
	unsigned first_pte = first_entry % GEN6_PTES;
	unsigned last_pte, i;

	scratch_pte = vm->pte_encode(vm->scratch_page.daddr,
				     I915_CACHE_LLC, 0);

	while (num_entries) {
		last_pte = first_pte + num_entries;
		if (last_pte > GEN6_PTES)
			last_pte = GEN6_PTES;

		pt_vaddr = kmap_px(ppgtt->pd.page_table[act_pt]);

		for (i = first_pte; i < last_pte; i++)
			pt_vaddr[i] = scratch_pte;

		kunmap_px(ppgtt, pt_vaddr);

		num_entries -= last_pte - first_pte;
		first_pte = 0;
		act_pt++;
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
113
71.07%
7
41.18%
daniel vetter
daniel vetter
31
19.50%
3
17.65%
mika kuoppala
mika kuoppala
5
3.14%
2
11.76%
michel thierry
michel thierry
5
3.14%
1
5.88%
chris wilson
chris wilson
2
1.26%
1
5.88%
kenneth graunke
kenneth graunke
1
0.63%
1
5.88%
joonas lahtinen
joonas lahtinen
1
0.63%
1
5.88%
akash goel
akash goel
1
0.63%
1
5.88%
Total
159
100.00%
17
100.00%



static void gen6_ppgtt_insert_entries(struct i915_address_space *vm,
				      struct sg_table *pages,
				      uint64_t start,
				      enum i915_cache_level cache_level, u32 flags)
{
	struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
	unsigned first_entry = start >> PAGE_SHIFT;
	unsigned act_pt = first_entry / GEN6_PTES;
	unsigned act_pte = first_entry % GEN6_PTES;
	gen6_pte_t *pt_vaddr = NULL;
	struct sgt_iter sgt_iter;
	dma_addr_t addr;

	for_each_sgt_dma(addr, sgt_iter, pages) {
		if (pt_vaddr == NULL)
			pt_vaddr = kmap_px(ppgtt->pd.page_table[act_pt]);

		pt_vaddr[act_pte] =
			vm->pte_encode(addr, cache_level, flags);

		if (++act_pte == GEN6_PTES) {
			kunmap_px(ppgtt, pt_vaddr);
			pt_vaddr = NULL;
			act_pt++;
			act_pte = 0;
		}
	}

	if (pt_vaddr)
		kunmap_px(ppgtt, pt_vaddr);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
76
49.35%
6
35.29%
chris wilson
chris wilson
31
20.13%
3
17.65%
dave gordon
dave gordon
16
10.39%
1
5.88%
daniel vetter
daniel vetter
14
9.09%
2
11.76%
mika kuoppala
mika kuoppala
7
4.55%
1
5.88%
akash goel
akash goel
4
2.60%
1
5.88%
michel thierry
michel thierry
3
1.95%
1
5.88%
kenneth graunke
kenneth graunke
2
1.30%
1
5.88%
joonas lahtinen
joonas lahtinen
1
0.65%
1
5.88%
Total
154
100.00%
17
100.00%



static int gen6_alloc_va_range(struct i915_address_space *vm,
			       uint64_t start_in, uint64_t length_in)
{
	DECLARE_BITMAP(new_page_tables, I915_PDES);
	struct drm_i915_private *dev_priv = to_i915(vm->dev);
	struct i915_ggtt *ggtt = &dev_priv->ggtt;
	struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
	struct i915_page_table *pt;
	uint32_t start, length, start_save, length_save;
	uint32_t pde;
	int ret;

	if (WARN_ON(start_in + length_in > ppgtt->base.total))
		return -ENODEV;

	start = start_save = start_in;
	length = length_save = length_in;

	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, pde) {
		if (pt != vm->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(dev_priv);
		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, pde) {
		DECLARE_BITMAP(tmp_bitmap, GEN6_PTES);

		bitmap_zero(tmp_bitmap, GEN6_PTES);
		bitmap_set(tmp_bitmap, gen6_pte_index(start),
			   gen6_pte_count(start, length));

		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(ggtt->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] = vm->scratch_pt;
		free_pt(dev_priv, pt);
	}

	mark_tlbs_dirty(ppgtt);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
272
64.61%
3
21.43%
ben widawsky
ben widawsky
89
21.14%
2
14.29%
mika kuoppala
mika kuoppala
41
9.74%
5
35.71%
joonas lahtinen
joonas lahtinen
15
3.56%
3
21.43%
tvrtko ursulin
tvrtko ursulin
4
0.95%
1
7.14%
Total
421
100.00%
14
100.00%



static int gen6_init_scratch(struct i915_address_space *vm)
{
	struct drm_i915_private *dev_priv = to_i915(vm->dev);
	int ret;

	ret = setup_scratch_page(dev_priv, &vm->scratch_page, I915_GFP_DMA);
	if (ret)
		return ret;

	vm->scratch_pt = alloc_pt(dev_priv);
	if (IS_ERR(vm->scratch_pt)) {
		cleanup_scratch_page(dev_priv, &vm->scratch_page);
		return PTR_ERR(vm->scratch_pt);
	}

	gen6_initialize_pt(vm, vm->scratch_pt);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
mika kuoppala
mika kuoppala
73
75.26%
1
25.00%
chris wilson
chris wilson
16
16.49%
2
50.00%
tvrtko ursulin
tvrtko ursulin
8
8.25%
1
25.00%
Total
97
100.00%
4
100.00%



static void gen6_free_scratch(struct i915_address_space *vm)
{
	struct drm_i915_private *dev_priv = to_i915(vm->dev);

	free_pt(dev_priv, vm->scratch_pt);
	cleanup_scratch_page(dev_priv, &vm->scratch_page);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
mika kuoppala
mika kuoppala
33
78.57%
1
33.33%
tvrtko ursulin
tvrtko ursulin
7
16.67%
1
33.33%
chris wilson
chris wilson
2
4.76%
1
33.33%
Total
42
100.00%
3
100.00%



static void gen6_ppgtt_cleanup(struct i915_address_space *vm)
{
	struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
	struct i915_page_directory *pd = &ppgtt->pd;
	struct drm_i915_private *dev_priv = to_i915(vm->dev);
	struct i915_page_table *pt;
	uint32_t pde;

	drm_mm_remove_node(&ppgtt->node);

	gen6_for_all_pdes(pt, pd, pde)
		if (pt != vm->scratch_pt)
			free_pt(dev_priv, pt);

	gen6_free_scratch(vm);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
25
28.74%
3
25.00%
daniel vetter
daniel vetter
24
27.59%
2
16.67%
dave gordon
dave gordon
18
20.69%
1
8.33%
ben widawsky
ben widawsky
7
8.05%
1
8.33%
tvrtko ursulin
tvrtko ursulin
6
6.90%
1
8.33%
mika kuoppala
mika kuoppala
6
6.90%
3
25.00%
joonas lahtinen
joonas lahtinen
1
1.15%
1
8.33%
Total
87
100.00%
12
100.00%



static int gen6_ppgtt_allocate_page_directories(struct i915_hw_ppgtt *ppgtt)
{
	struct i915_address_space *vm = &ppgtt->base;
	struct drm_i915_private *dev_priv = to_i915(ppgtt->base.dev);
	struct i915_ggtt *ggtt = &dev_priv->ggtt;
	bool retried = false;
	int ret;

	/* PPGTT PDEs reside in the GGTT and consists of 512 entries. The
         * allocator works in address space sizes, so it's multiplied by page
         * size. We allocate at the top of the GTT to avoid fragmentation.
         */
	BUG_ON(!drm_mm_initialized(&ggtt->base.mm));

	ret = gen6_init_scratch(vm);
	if (ret)
		return ret;

alloc:
	ret = drm_mm_insert_node_in_range_generic(&ggtt->base.mm,
						  &ppgtt->node, GEN6_PD_SIZE,
						  GEN6_PD_ALIGN, 0,
						  0, ggtt->base.total,
						  DRM_MM_TOPDOWN);
	if (ret == -ENOSPC && !retried) {
		ret = i915_gem_evict_something(&ggtt->base,
					       GEN6_PD_SIZE, GEN6_PD_ALIGN,
					       I915_CACHE_NONE,
					       0, ggtt->base.total,
					       0);
		if (ret)
			goto err_out;

		retried = true;
		goto alloc;
	}

	if (ret)
		goto err_out;


	if (ppgtt->node.start < ggtt->mappable_end)
		DRM_DEBUG("Forced to use aperture for PDEs\n");

	return 0;

err_out:
	gen6_free_scratch(vm);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
119
57.77%
10
50.00%
joonas lahtinen
joonas lahtinen
24
11.65%
2
10.00%
daniel vetter
daniel vetter
24
11.65%
4
20.00%
mika kuoppala
mika kuoppala
17
8.25%
1
5.00%
michel thierry
michel thierry
12
5.83%
1
5.00%
chris wilson
chris wilson
6
2.91%
1
5.00%
tvrtko ursulin
tvrtko ursulin
4
1.94%
1
5.00%
Total
206
100.00%
20
100.00%



static int gen6_ppgtt_alloc(struct i915_hw_ppgtt *ppgtt)
{
	return gen6_ppgtt_allocate_page_directories(ppgtt);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
14
82.35%
1
33.33%
michel thierry
michel thierry
2
11.76%
1
33.33%
fengguang wu
fengguang wu
1
5.88%
1
33.33%
Total
17
100.00%
3
100.00%



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;

	gen6_for_each_pde(unused, &ppgtt->pd, start, length, pde)
		ppgtt->pd.page_table[pde] = ppgtt->base.scratch_pt;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michel thierry
michel thierry
43
82.69%
3
50.00%
ben widawsky
ben widawsky
7
13.46%
2
33.33%
mika kuoppala
mika kuoppala
2
3.85%
1
16.67%
Total
52
100.00%
6
100.00%



static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
{
	struct drm_i915_private *dev_priv = to_i915(ppgtt->base.dev);
	struct i915_ggtt *ggtt = &dev_priv->ggtt;
	int ret;

	ppgtt->base.pte_encode = ggtt->base.pte_encode;
	if (intel_vgpu_active(dev_priv) || IS_GEN6(dev_priv))
		ppgtt->switch_mm = gen6_mm_switch;
	else if (IS_HASWELL(dev_priv))
		ppgtt->switch_mm = hsw_mm_switch;
	else if (IS_GEN7(dev_priv))
		ppgtt->switch_mm = gen7_mm_switch;
	else
		BUG();

	ret = gen6_ppgtt_alloc(ppgtt);
	if (ret)
		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->base.unbind_vma = ppgtt_unbind_vma;
	ppgtt->base.bind_vma = ppgtt_bind_vma;
	ppgtt->base.cleanup = gen6_ppgtt_cleanup;
	ppgtt->base.start = 0;
	ppgtt->base.total = I915_PDES * GEN6_PTES * PAGE_SIZE;
	ppgtt->debug_dump = gen6_dump_ppgtt;

	ppgtt->pd.base.ggtt_offset =
		ppgtt->node.start / PAGE_SIZE * sizeof(gen6_pte_t);

	ppgtt->pd_addr = (gen6_pte_t __iomem *)ggtt->gsm +
		ppgtt->pd.base.ggtt_offset / sizeof(gen6_pte_t);

	gen6_scratch_va_range(ppgtt, 0, ppgtt->base.total);

	gen6_write_page_range(dev_priv, &ppgtt->pd, 0, ppgtt->base.total);

	DRM_DEBUG_DRIVER("Allocated pde space (%lldM) at GTT entry: %llx\n",
			 ppgtt->node.size >> 20,
			 ppgtt->node.start / PAGE_SIZE);

	DRM_DEBUG("Adding PPGTT at offset %x\n",
		  ppgtt->pd.base.ggtt_offset << 10);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
215
70.49%
9
37.50%
daniel vetter
daniel vetter
36
11.80%
4
16.67%
joonas lahtinen
joonas lahtinen
16
5.25%
2
8.33%
michel thierry
michel thierry
16
5.25%
3
12.50%
mika kuoppala
mika kuoppala
9
2.95%
1
4.17%
tvrtko ursulin
tvrtko ursulin
7
2.30%
3
12.50%
chris wilson
chris wilson
5
1.64%
1
4.17%
thierry reding
thierry reding
1
0.33%
1
4.17%
Total
305
100.00%
24
100.00%



static int __hw_ppgtt_init(struct i915_hw_ppgtt *ppgtt,
			   struct drm_i915_private *dev_priv)
{
	ppgtt->base.dev = &dev_priv->drm;

	if (INTEL_INFO(dev_priv)->gen < 8)
		return gen6_ppgtt_init(ppgtt);
	else
		return gen8_ppgtt_init(ppgtt);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
28
54.90%
4
44.44%
daniel vetter
daniel vetter
11
21.57%
2
22.22%
chris wilson
chris wilson
9
17.65%
1
11.11%
michel thierry
michel thierry
2
3.92%
1
11.11%
rodrigo vivi
rodrigo vivi
1
1.96%
1
11.11%
Total
51
100.00%
9
100.00%



static void i915_address_space_init(struct i915_address_space *vm,
				    struct drm_i915_private *dev_priv,
				    const char *name)
{
	i915_gem_timeline_init(dev_priv, &vm->timeline, name);
	drm_mm_init(&vm->mm, vm->start, vm->total);
	INIT_LIST_HEAD(&vm->active_list);
	INIT_LIST_HEAD(&vm->inactive_list);
	INIT_LIST_HEAD(&vm->unbound_list);
	list_add_tail(&vm->global_link, &dev_priv->vm_list);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
michal winiarski
michal winiarski
61
70.93%
1
33.33%
chris wilson
chris wilson
25
29.07%
2
66.67%
Total
86
100.00%
3
100.00%



static void i915_address_space_fini(struct i915_address_space *vm)
{
	i915_gem_timeline_fini(&vm->timeline);
	drm_mm_takedown(&vm->mm);
	list_del(&vm->global_link);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
matthew auld
matthew auld
35
100.00%
1
100.00%
Total
35
100.00%
1
100.00%



static void gtt_write_workarounds(struct drm_i915_private *dev_priv)
{
	/* This function is for gtt related workarounds. This function is
         * called on driver load and after a GPU reset, so you can place
         * workarounds here even if they get overwritten by GPU reset.
         */
	/* WaIncreaseDefaultTLBEntries:chv,bdw,skl,bxt */
	if (IS_BROADWELL(dev_priv))
		I915_WRITE(GEN8_L3_LRA_1_GPGPU, GEN8_L3_LRA_1_GPGPU_DEFAULT_VALUE_BDW);
	else if (IS_CHERRYVIEW(dev_priv))
		I915_WRITE(GEN8_L3_LRA_1_GPGPU, GEN8_L3_LRA_1_GPGPU_DEFAULT_VALUE_CHV);
	else if (IS_SKYLAKE(dev_priv))
		I915_WRITE(GEN8_L3_LRA_1_GPGPU, GEN9_L3_LRA_1_GPGPU_DEFAULT_VALUE_SKL);
	else if (IS_BROXTON(dev_priv))
		I915_WRITE(GEN8_L3_LRA_1_GPGPU, GEN9_L3_LRA_1_GPGPU_DEFAULT_VALUE_BXT);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
tim gore
tim gore
66
91.67%
1
16.67%
tvrtko ursulin
tvrtko ursulin
6
8.33%
5
83.33%
Total
72
100.00%
6
100.00%



static int i915_ppgtt_init(struct i915_hw_ppgtt *ppgtt,
			   struct drm_i915_private *dev_priv,
			   struct drm_i915_file_private *file_priv,
			   const char *name)
{
	int ret;

	ret = __hw_ppgtt_init(ppgtt, dev_priv);
	if (ret == 0) {
		kref_init(&ppgtt->ref);
		i915_address_space_init(&ppgtt->base, dev_priv, name);
		ppgtt->base.file = file_priv;
	}

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
27
35.06%
4
44.44%
chris wilson
chris wilson
26
33.77%
3
33.33%
daniel vetter
daniel vetter
23
29.87%
1
11.11%
michal winiarski
michal winiarski
1
1.30%
1
11.11%
Total
77
100.00%
9
100.00%



int i915_ppgtt_init_hw(struct drm_i915_private *dev_priv)
{
	gtt_write_workarounds(dev_priv);

	/* In the case of execlists, PPGTT is enabled by the context descriptor
         * and the PDPs are contained within the context itself.  We don't
         * need to do anything here. */
	if (i915.enable_execlists)
		return 0;

	if (!USES_PPGTT(dev_priv))
		return 0;

	if (IS_GEN6(dev_priv))
		gen6_ppgtt_enable(dev_priv);
	else if (IS_GEN7(dev_priv))
		gen7_ppgtt_enable(dev_priv);
	else if (INTEL_GEN(dev_priv) >= 8)
		gen8_ppgtt_enable(dev_priv);
	else
		MISSING_CASE(INTEL_GEN(dev_priv));

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
daniel vetter
daniel vetter
48
54.55%
2
22.22%
tvrtko ursulin
tvrtko ursulin
16
18.18%
2
22.22%
thomas daniel
thomas daniel
10
11.36%
1
11.11%
ben widawsky
ben widawsky
6
6.82%
2
22.22%
john harrison
john harrison
4
4.55%
1
11.11%
tim gore
tim gore
4
4.55%
1
11.11%
Total
88
100.00%
9
100.00%


struct i915_hw_ppgtt *

i915_ppgtt_create(struct drm_i915_private *dev_priv,
		  struct drm_i915_file_private *fpriv,
		  const char *name)
{
	struct i915_hw_ppgtt *ppgtt;
	int ret;

	ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL);
	if (!ppgtt)
		return ERR_PTR(-ENOMEM);

	ret = i915_ppgtt_init(ppgtt, dev_priv, fpriv, name);
	if (ret) {
		kfree(ppgtt);
		return ERR_PTR(ret);
	}

	trace_i915_ppgtt_create(&ppgtt->base);

	return ppgtt;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
daniel vetter
daniel vetter
73
76.04%
1
20.00%
chris wilson
chris wilson
13
13.54%
2
40.00%
daniele ceraolo spurio
daniele ceraolo spurio
8
8.33%
1
20.00%
ben widawsky
ben widawsky
2
2.08%
1
20.00%
Total
96
100.00%
5
100.00%



void i915_ppgtt_release(struct kref *kref)
{
	struct i915_hw_ppgtt *ppgtt =
		container_of(kref, struct i915_hw_ppgtt, ref);

	trace_i915_ppgtt_release(&ppgtt->base);

	/* vmas should already be unbound and destroyed */
	WARN_ON(!list_empty(&ppgtt->base.active_list));
	WARN_ON(!list_empty(&ppgtt->base.inactive_list));
	WARN_ON(!list_empty(&ppgtt->base.unbound_list));

	i915_address_space_fini(&ppgtt->base);

	ppgtt->base.cleanup(&ppgtt->base);
	kfree(ppgtt);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
daniel vetter
daniel vetter
75
74.26%
3
37.50%
chris wilson
chris wilson
15
14.85%
1
12.50%
daniele ceraolo spurio
daniele ceraolo spurio
8
7.92%
1
12.50%
ben widawsky
ben widawsky
2
1.98%
2
25.00%
matthew auld
matthew auld
1
0.99%
1
12.50%
Total
101
100.00%
8
100.00%

/* Certain Gen5 chipsets require require idling the GPU before
 * unmapping anything from the GTT when VT-d is enabled.
 */


static bool needs_idle_maps(struct drm_i915_private *dev_priv)
{
#ifdef CONFIG_INTEL_IOMMU
	/* Query intel_iommu to see if we need the workaround. Presumably that
         * was loaded first.
         */
	if (IS_GEN5(dev_priv) && IS_MOBILE(dev_priv) && intel_iommu_gfx_mapped)
		return true;
#endif
	return false;
}

Contributors
Person
Tokens
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Commits
CommitProp
ben widawsky
ben widawsky
33
89.19%
1
50.00%
chris wilson
chris wilson
4
10.81%
1
50.00%
Total
37
100.00%
2
100.00%



void i915_check_and_clear_faults(struct drm_i915_private *dev_priv)
{
	struct intel_engine_cs *engine;
	enum intel_engine_id id;

	if (INTEL_INFO(dev_priv)->gen < 6)
		return;

	for_each_engine(engine, dev_priv, id) {
		u32 fault_reg;
		fault_reg = I915_READ(RING_FAULT_REG(engine));
		if (fault_reg & RING_FAULT_VALID) {
			DRM_DEBUG_DRIVER("Unexpected fault\n"
					 "\tAddr: 0x%08lx\n"
					 "\tAddress space: %s\n"
					 "\tSource ID: %d\n"
					 "\tType: %d\n",
					 fault_reg & PAGE_MASK,
					 fault_reg & RING_FAULT_GTTSEL_MASK ? "GGTT" : "PPGTT",
					 RING_FAULT_SRCID(fault_reg),
					 RING_FAULT_FAULT_TYPE(fault_reg));
			I915_WRITE(RING_FAULT_REG(engine),
				   fault_reg & ~RING_FAULT_VALID);
		}
	}

	/* Engine specific init may not have been done till this point. */
	if (dev_priv->engine[RCS])
		POSTING_READ(RING_FAULT_REG(dev_priv->engine[RCS]));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
102
79.07%
1
12.50%
akash goel
akash goel
16
12.40%
1
12.50%
tvrtko ursulin
tvrtko ursulin
6
4.65%
3
37.50%
chris wilson
chris wilson
3
2.33%
1
12.50%
oscar mateo
oscar mateo
1
0.78%
1
12.50%
paulo zanoni
paulo zanoni
1
0.78%
1
12.50%
Total
129
100.00%
8
100.00%



static void i915_ggtt_flush(struct drm_i915_private *dev_priv)
{
	if (INTEL_INFO(dev_priv)->gen < 6) {
		intel_gtt_chipset_flush();
	} else {
		I915_WRITE(GFX_FLSH_CNTL_GEN6, GFX_FLSH_CNTL_EN);
		POSTING_READ(GFX_FLSH_CNTL_GEN6);
	}
}

Contributors
Person
Tokens
Prop
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CommitProp
chris wilson
chris wilson
42
100.00%
1
100.00%
Total
42
100.00%
1
100.00%



void i915_gem_suspend_gtt_mappings(struct drm_i915_private *dev_priv)
{
	struct i915_ggtt *ggtt = &dev_priv->ggtt;

	/* Don't bother messing with faults pre GEN6 as we have little
         * documentation supporting that it's a good idea.
         */
	if (INTEL_GEN(dev_priv) < 6)
		return;

	i915_check_and_clear_faults(dev_priv);

	ggtt->base.clear_range(&ggtt->base, ggtt->base.start, ggtt->base.total);

	i915_ggtt_flush(dev_priv);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
39
60.00%
1
16.67%
joonas lahtinen
joonas lahtinen
16
24.62%
2
33.33%
chris wilson
chris wilson
6
9.23%
2
33.33%
tvrtko ursulin
tvrtko ursulin
4
6.15%
1
16.67%
Total
65
100.00%
6
100.00%



int i915_gem_gtt_prepare_pages(struct drm_i915_gem_object *obj,
			       struct sg_table *pages)
{
	if (dma_map_sg(&obj->base.dev->pdev->dev,
		       pages->sgl, pages->nents,
		       PCI_DMA_BIDIRECTIONAL))
		return 0;

	return -ENOSPC;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
chris wilson
chris wilson
43
89.58%
3
60.00%
daniel vetter
daniel vetter
5
10.42%
2
40.00%
Total
48
100.00%
5
100.00%



static void gen8_set_pte(void __iomem *addr, gen8_pte_t pte)
{
	writeq(pte, addr);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
20
95.24%
1
50.00%
michel thierry
michel thierry
1
4.76%
1
50.00%
Total
21
100.00%
2
100.00%



static void gen8_ggtt_insert_page(struct i915_address_space *vm,
				  dma_addr_t addr,
				  uint64_t offset,
				  enum i915_cache_level level,
				  u32 unused)
{
	struct drm_i915_private *dev_priv = to_i915(vm->dev);
	gen8_pte_t __iomem *pte =
		(gen8_pte_t __iomem *)dev_priv->ggtt.gsm +
		(offset >> PAGE_SHIFT);

	gen8_set_pte(pte, gen8_pte_encode(addr, level));

	I915_WRITE(GFX_FLSH_CNTL_GEN6, GFX_FLSH_CNTL_EN);
	POSTING_READ(GFX_FLSH_CNTL_GEN6);
}

Contributors
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Tokens
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chris wilson
chris wilson
82
100.00%
1
100.00%
Total
82
100.00%
1
100.00%



static void gen8_ggtt_insert_entries(struct i915_address_space *vm,
				     struct sg_table *st,
				     uint64_t start,
				     enum i915_cache_level level, u32 unused)
{
	struct drm_i915_private *dev_priv = to_i915(vm->dev);
	struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
	struct sgt_iter sgt_iter;
	gen8_pte_t __iomem *gtt_entries;
	gen8_pte_t gtt_entry;
	dma_addr_t addr;
	int i = 0;

	gtt_entries = (gen8_pte_t __iomem *)ggtt->gsm + (start >> PAGE_SHIFT);

	for_each_sgt_dma(addr, sgt_iter, st) {
		gtt_entry = gen8_pte_encode(addr, level);
		gen8_set_pte(&gtt_entries[i++], gtt_entry);
	}

	/*
         * XXX: This serves as a posting read to make sure that the PTE has
         * actually been updated. There is some concern that even though
         * registers and PTEs are within the same BAR that they are potentially
         * of NUMA access patterns. Therefore, even with the way we assume
         * hardware should work, we must keep this posting read for paranoia.
         */
	if (i != 0)
		WARN_ON(readq(&gtt_entries[i-1]) != gtt_entry);

	/* This next bit makes the above posting read even more important. We
         * want to flush the TLBs only after we're certain all the PTE updates
         * have finished.
         */
	I915_WRITE(GFX_FLSH_CNTL_GEN6, GFX_FLSH_CNTL_EN);
	POSTING_READ(GFX_FLSH_CNTL_GEN6);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
95
62.50%
3
33.33%
dave gordon
dave gordon
39
25.66%
1
11.11%
joonas lahtinen
joonas lahtinen
9
5.92%
1
11.11%
chris wilson
chris wilson
4
2.63%
1
11.11%
akash goel
akash goel
3
1.97%
1
11.11%
michel thierry
michel thierry
1
0.66%
1
11.11%
imre deak
imre deak
1
0.66%
1
11.11%
Total
152
100.00%
9
100.00%


struct insert_entries {
	
struct i915_address_space *vm;
	
struct sg_table *st;
	
uint64_t start;
	
enum i915_cache_level level;
	
u32 flags;
};



static int gen8_ggtt_insert_entries__cb(void *_arg)
{
	struct insert_entries *arg = _arg;
	gen8_ggtt_insert_entries(arg->vm, arg->st,
				 arg->start, arg->level, arg->flags);
	return 0;
}

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chris wilson
chris wilson
43
100.00%
1
100.00%
Total
43
100.00%
1
100.00%



static void gen8_ggtt_insert_entries__BKL(struct i915_address_space *vm,
					  struct sg_table *st,
					  uint64_t start,
					  enum i915_cache_level level,
					  u32 flags)
{
	struct insert_entries arg = { vm, st, start, level, flags };
	stop_machine(gen8_ggtt_insert_entries__cb, &arg, NULL);
}

Contributors
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Tokens
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chris wilson
chris wilson
52
100.00%
1
100.00%
Total
52
100.00%
1
100.00%



static void gen6_ggtt_insert_page(struct i915_address_space *vm,
				  dma_addr_t addr,
				  uint64_t offset,
				  enum i915_cache_level level,
				  u32 flags)
{
	struct drm_i915_private *dev_priv = to_i915(vm->dev);
	gen6_pte_t __iomem *pte =
		(gen6_pte_t __iomem *)dev_priv->ggtt.gsm +
		(offset >> PAGE_SHIFT);

	iowrite32(vm->pte_encode(addr, level, flags), pte);

	I915_WRITE(GFX_FLSH_CNTL_GEN6, GFX_FLSH_CNTL_EN);
	POSTING_READ(GFX_FLSH_CNTL_GEN6);
}

Contributors
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chris wilson
chris wilson
86
100.00%
1
100.00%
Total
86
100.00%
1
100.00%

/*
 * Binds an object into the global gtt with the specified cache level. The object
 * will be accessible to the GPU via commands whose operands reference offsets
 * within the global GTT as well as accessible by the GPU through the GMADR
 * mapped BAR (dev_priv->mm.gtt->gtt).
 */


static void gen6_ggtt_insert_entries(struct i915_address_space *vm,
				     struct sg_table *st,
				     uint64_t start,
				     enum i915_cache_level level, u32 flags)
{
	struct drm_i915_private *dev_priv = to_i915(vm->dev);
	struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
	struct sgt_iter sgt_iter;
	gen6_pte_t __iomem *gtt_entries;
	gen6_pte_t gtt_entry;
	dma_addr_t addr;
	int i = 0;

	gtt_entries = (gen6_pte_t __iomem *)ggtt->gsm + (start >> PAGE_SHIFT);

	for_each_sgt_dma(addr, sgt_iter, st) {
		gtt_entry = vm->pte_encode(addr, level, flags);
		iowrite32(gtt_entry, &gtt_entries[i++]);
	}

	/* XXX: This serves as a posting read to make sure that the PTE has
         * actually been updated. There is some concern that even though
         * registers and PTEs are within the same BAR that they are potentially
         * of NUMA access patterns. Therefore, even with the way we assume
         * hardware should work, we must keep this posting read for paranoia.
         */
	if (i != 0)
		WARN_ON(readl(&gtt_entries[i-1]) != gtt_entry);

	/* This next bit makes the above posting read even more important. We
         * want to flush the TLBs only after we're certain all the PTE updates
         * have finished.
         */
	I915_WRITE(GFX_FLSH_CNTL_GEN6, GFX_FLSH_CNTL_EN);
	POSTING_READ(GFX_FLSH_CNTL_GEN6);
}

Contributors
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daniel vetter
daniel vetter
47
30.13%
2
11.76%
ben widawsky
ben widawsky
41
26.28%
5
29.41%
dave gordon
dave gordon
39
25.00%
1
5.88%
chris wilson
chris wilson
11
7.05%
3
17.65%
joonas lahtinen
joonas lahtinen
9
5.77%
1
5.88%
akash goel
akash goel
4
2.56%
1
5.88%
imre deak
imre deak
2
1.28%
2
11.76%
kenneth graunke
kenneth graunke
2
1.28%
1
5.88%
michel thierry
michel thierry
1
0.64%
1
5.88%
Total
156
100.00%
17
100.00%



static void nop_clear_range(struct i915_address_space *vm,
			    uint64_t start, uint64_t length)
{
}

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chris wilson
chris wilson
16
100.00%
1
100.00%
Total
16
100.00%
1
100.00%



static void gen8_ggtt_clear_range(struct i915_address_space *vm,
				  uint64_t start, uint64_t length)
{
	struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
	unsigned first_entry = start >> PAGE_SHIFT;
	unsigned num_entries = length >> PAGE_SHIFT;
	gen8_pte_t scratch_pte, __iomem *gtt_base =
		(gen8_pte_t __iomem *)ggtt->gsm + first_entry;
	const int max_entries = ggtt_total_entries(ggtt) - first_entry;
	int i;

	if (WARN(num_entries > max_entries,
		 "First entry = %d; Num entries = %d (max=%d)\n",
		 first_entry, num_entries, max_entries))
		num_entries = max_entries;

	scratch_pte = gen8_pte_encode(vm->scratch_page.daddr,
				      I915_CACHE_LLC);
	for (i = 0; i < num_entries; i++)
		gen8_set_pte(&gtt_base[i], scratch_pte);
	readl(gtt_base);
}

Contributors
Person
Tokens
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ben widawsky
ben widawsky
119
87.50%
2
25.00%
joonas lahtinen
joonas lahtinen
8
5.88%
2
25.00%
chris wilson
chris wilson
6
4.41%
2
25.00%
michel thierry
michel thierry
2
1.47%
1
12.50%
mika kuoppala
mika kuoppala
1
0.74%
1
12.50%
Total
136
100.00%
8
100.00%



static void gen6_ggtt_clear_range(struct i915_address_space *vm,
				  uint64_t start,
				  uint64_t length)
{
	struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
	unsigned first_entry = start >> PAGE_SHIFT;
	unsigned num_entries = length >> PAGE_SHIFT;
	gen6_pte_t scratch_pte, __iomem *gtt_base =
		(gen6_pte_t __iomem *)ggtt->gsm + first_entry;
	const int max_entries = ggtt_total_entries(ggtt) - first_entry;
	int i;

	if (WARN(num_entries > max_entries,
		 "First entry = %d; Num entries = %d (max=%d)\n",
		 first_entry, num_entries, max_entries))
		num_entries = max_entries;

	scratch_pte = vm->pte_encode(vm->scratch_page.daddr,
				     I915_CACHE_LLC, 0);

	for (i = 0; i < num_entries; i++)
		iowrite32(scratch_pte, &gtt_base[i]);
	readl(gtt_base);
}

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daniel vetter
daniel vetter
74
52.86%
1
6.67%
ben widawsky
ben widawsky
46
32.86%
6
40.00%
joonas lahtinen
joonas lahtinen
8
5.71%
2
13.33%
chris wilson
chris wilson
6
4.29%
2
13.33%
kenneth graunke
kenneth graunke
2
1.43%
1
6.67%
michel thierry
michel thierry
2
1.43%
1
6.67%
akash goel
akash goel
1
0.71%
1
6.67%
mika kuoppala
mika kuoppala
1
0.71%
1
6.67%
Total
140
100.00%
15
100.00%



static void i915_ggtt_insert_page(struct i915_address_space *vm,
				  dma_addr_t addr,
				  uint64_t offset,
				  enum i915_cache_level cache_level,
				  u32 unused)
{
	unsigned int flags = (cache_level == I915_CACHE_NONE) ?
		AGP_USER_MEMORY : AGP_USER_CACHED_MEMORY;

	intel_gtt_insert_page(addr, offset >> PAGE_SHIFT, flags);
}

Contributors
Person
Tokens
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chris wilson
chris wilson
49
100.00%
1
100.00%
Total
49
100.00%
1
100.00%



static void i915_ggtt_insert_entries(struct i915_address_space *vm,
				     struct sg_table *pages,
				     uint64_t start,
				     enum i915_cache_level cache_level, u32 unused)
{
	unsigned int flags = (cache_level == I915_CACHE_NONE) ?
		AGP_USER_MEMORY : AGP_USER_CACHED_MEMORY;

	intel_gtt_insert_sg_entries(pages, start >> PAGE_SHIFT, flags);

}

Contributors
Person
Tokens
Prop
Commits
CommitProp
daniel vetter
daniel vetter
43
84.31%
2
50.00%
ben widawsky
ben widawsky
8
15.69%
2
50.00%
Total
51
100.00%
4
100.00%



static void i915_ggtt_clear_range(struct i915_address_space *vm,
				  uint64_t start,
				  uint64_t length)
{
	intel_gtt_clear_range(start >> PAGE_SHIFT, length >> PAGE_SHIFT);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
13
46.43%
3
42.86%
daniel vetter
daniel vetter
10
35.71%
1
14.29%
chris wilson
chris wilson
3
10.71%
2
28.57%
imre deak
imre deak
2
7.14%
1
14.29%
Total
28
100.00%
7
100.00%



static int ggtt_bind_vma(struct i915_vma *vma,
			 enum i915_cache_level cache_level,
			 u32 flags)
{
	struct drm_i915_private *i915 = to_i915(vma->vm->dev);
	struct drm_i915_gem_object *obj = vma->obj;
	u32 pte_flags = 0;
	int ret;

	ret = i915_get_ggtt_vma_pages(vma);
	if (ret)
		return ret;

	/* Currently applicable only to VLV */
	if (obj->gt_ro)
		pte_flags |= PTE_READ_ONLY;

	intel_runtime_pm_get(i915);
	vma->vm->insert_entries(vma->vm, vma->pages, vma->node.start,
				cache_level, pte_flags);
	intel_runtime_pm_put(i915);

	/*
         * Without aliasing PPGTT there's no difference between
         * GLOBAL/LOCAL_BIND, it's all the same ptes. Hence unconditionally
         * upgrade to both bound if we bind either to avoid double-binding.
         */
	vma->flags |= I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
daniel vetter
daniel vetter
77
63.64%
2
33.33%
chris wilson
chris wilson
27
22.31%
2
33.33%
ben widawsky
ben widawsky
17
14.05%
2
33.33%
Total
121
100.00%
6
100.00%



static int aliasing_gtt_bind_vma(struct i915_vma *vma,
				 enum i915_cache_level cache_level,
				 u32 flags)
{
	struct drm_i915_private *i915 = to_i915(vma->vm->dev);
	u32 pte_flags;
	int ret;

	ret = i915_get_ggtt_vma_pages(vma);
	if (ret)
		return ret;

	/* Currently applicable only to VLV */
	pte_flags = 0;
	if (vma->obj->gt_ro)
		pte_flags |= PTE_READ_ONLY;


	if (flags & I915_VMA_GLOBAL_BIND) {
		intel_runtime_pm_get(i915);
		vma->vm->insert_entries(vma->vm,
					vma->pages, vma->node.start,
					cache_level, pte_flags);
		intel_runtime_pm_put(i915);
	}

	if (flags & I915_VMA_LOCAL_BIND) {
		struct i915_hw_ppgtt *appgtt = i915->mm.aliasing_ppgtt;
		appgtt->base.insert_entries(&appgtt->base,
					    vma->pages, vma->node.start,
					    cache_level, pte_flags);
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
62
38.75%
4
26.67%
daniel vetter
daniel vetter
53
33.12%
5
33.33%
chris wilson
chris wilson
36
22.50%
3
20.00%
joonas lahtinen
joonas lahtinen
6
3.75%
1
6.67%
akash goel
akash goel
2
1.25%
1
6.67%
tvrtko ursulin
tvrtko ursulin
1
0.62%
1
6.67%
Total
160
100.00%
15
100.00%



static void ggtt_unbind_vma(struct i915_vma *vma)
{
	struct drm_i915_private *i915 = to_i915(vma->vm->dev);
	struct i915_hw_ppgtt *appgtt = i915->mm.aliasing_ppgtt;
	const u64 size = min(vma->size, vma->node.size);

	if (vma->flags & I915_VMA_GLOBAL_BIND) {
		intel_runtime_pm_get(i915);
		vma->vm->clear_range(vma->vm,
				     vma->node.start, size);
		intel_runtime_pm_put(i915);
	}

	if (vma->flags & I915_VMA_LOCAL_BIND && appgtt)
		appgtt->base.clear_range(&appgtt->base,
					 vma->node.start, size);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
56
45.90%
4
33.33%
chris wilson
chris wilson
36
29.51%
4
33.33%
joonas lahtinen
joonas lahtinen
14
11.48%
1
8.33%
daniel vetter
daniel vetter
12
9.84%
2
16.67%
tvrtko ursulin
tvrtko ursulin
4
3.28%
1
8.33%
Total
122
100.00%
12
100.00%



void i915_gem_gtt_finish_pages(struct drm_i915_gem_object *obj,
			       struct sg_table *pages)
{
	struct drm_i915_private *dev_priv = to_i915(obj->base.dev);
	struct device *kdev = &dev_priv->drm.pdev->dev;
	struct i915_ggtt *ggtt = &dev_priv->ggtt;

	if (unlikely(ggtt->do_idle_maps)) {
		if (i915_gem_wait_for_idle(dev_priv, I915_WAIT_LOCKED)) {
			DRM_ERROR("Failed to wait for idle; VT'd may hang.\n");
			/* Wait a bit, in hopes it avoids the hang */
			udelay(10);
		}
	}

	dma_unmap_sg(kdev, pages->sgl, pages->nents, PCI_DMA_BIDIRECTIONAL);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
chris wilson
chris wilson
55
54.46%
4
44.44%
ben widawsky
ben widawsky
19
18.81%
1
11.11%
david weinehall
david weinehall
15
14.85%
1
11.11%
daniel vetter
daniel vetter
12
11.88%
3
33.33%
Total
101
100.00%
9
100.00%



static void i915_gtt_color_adjust(struct drm_mm_node *node,
				  unsigned long color,
				  u64 *start,
				  u64 *end)
{
	if (node->color != color)
		*start += 4096;

	node = list_first_entry_or_null(&node->node_list,
					struct drm_mm_node,
					node_list);
	if (node && node->allocated && node->color != color)
		*end -= 4096;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
chris wilson
chris wilson
68
97.14%
2
66.67%
thierry reding
thierry reding
2
2.86%
1
33.33%
Total
70
100.00%
3
100.00%



int i915_gem_init_ggtt(struct drm_i915_private *dev_priv)
{
	/* Let GEM Manage all of the aperture.
         *
         * However, leave one page at the end still bound to the scratch page.
         * There are a number of places where the hardware apparently prefetches
         * past the end of the object, and we've seen multiple hangs with the
         * GPU head pointer stuck in a batchbuffer bound at the last page of the
         * aperture.  One page should be enough to keep any prefetching inside
         * of the aperture.
         */
	struct i915_ggtt *ggtt = &dev_priv->ggtt;
	unsigned long hole_start, hole_end;
	struct i915_hw_ppgtt *ppgtt;
	struct drm_mm_node *entry;
	int ret;

	ret = intel_vgt_balloon(dev_priv);
	if (ret)
		return ret;

	/* Reserve a mappable slot for our lockless error capture */
	ret = drm_mm_insert_node_in_range_generic(&ggtt->base.mm,
						  &ggtt->error_capture,
						  4096, 0, -1,
						  0, ggtt->mappable_end,
						  0, 0);
	if (ret)
		return ret;

	/* Clear any non-preallocated blocks */
	drm_mm_for_each_hole(entry, &ggtt->base.mm, hole_start, hole_end) {
		DRM_DEBUG_KMS("clearing unused GTT space: [%lx, %lx]\n",
			      hole_start, hole_end);
		ggtt->base.clear_range(&ggtt->base, hole_start,
				       hole_end - hole_start);
	}

	/* And finally clear the reserved guard page */
	ggtt->base.clear_range(&ggtt->base,
			       ggtt->base.total - PAGE_SIZE, PAGE_SIZE);

	if (USES_PPGTT(dev_priv) && !USES_FULL_PPGTT(dev_priv)) {
		ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL);
		if (!ppgtt) {
			ret = -ENOMEM;
			goto err;
		}

		ret = __hw_ppgtt_init(ppgtt, dev_priv);
		if (ret)
			goto err_ppgtt;

		if (ppgtt->base.allocate_va_range) {
			ret = ppgtt->base.allocate_va_range(&ppgtt->base, 0,
							    ppgtt->base.total);
			if (ret)
				goto err_ppgtt_cleanup;
		}

		ppgtt->base.clear_range(&ppgtt->base,
					ppgtt->base.start,
					ppgtt->base.total);

		dev_priv->mm.aliasing_ppgtt = ppgtt;
		WARN_ON(ggtt->base.bind_vma != ggtt_bind_vma);
		ggtt->base.bind_vma = aliasing_gtt_bind_vma;
	}

	return 0;

err_ppgtt_cleanup:
	ppgtt->base.cleanup(&ppgtt->base);
err_ppgtt:
	kfree(ppgtt);
err:
	drm_mm_remove_node(&ggtt->error_capture);
	return ret;
}

Contributors
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CommitProp
daniel vetter
daniel vetter
144
41.74%
6
28.57%
chris wilson
chris wilson
144
41.74%
5
23.81%
joonas lahtinen
joonas lahtinen
22
6.38%
2
9.52%
ben widawsky
ben widawsky
19
5.51%
5
23.81%
yu zhang
yu zhang
13
3.77%
1
4.76%
michel thierry
michel thierry
2
0.58%
1
4.76%
zhi wang
zhi wang
1
0.29%
1
4.76%
Total
345
100.00%
21
100.00%

/**
 * i915_ggtt_cleanup_hw - Clean up GGTT hardware initialization
 * @dev_priv: i915 device
 */


void i915_ggtt_cleanup_hw(struct drm_i915_private *dev_priv)
{
	struct i915_ggtt *ggtt = &dev_priv->ggtt;

	if (dev_priv->mm.aliasing_ppgtt) {
		struct i915_hw_ppgtt *ppgtt = dev_priv->mm.aliasing_ppgtt;
		ppgtt->base.cleanup(&ppgtt->base);
		kfree(ppgtt);
	}

	i915_gem_cleanup_stolen(&dev_priv->drm);

	if (drm_mm_node_allocated(&ggtt->error_capture))
		drm_mm_remove_node(&ggtt->error_capture);

	if (drm_mm_initialized(&ggtt->base.mm)) {
		intel_vgt_deballoon(dev_priv);

		mutex_lock(&dev_priv->drm.struct_mutex);
		i915_address_space_fini(&ggtt->base);
		mutex_unlock(&dev_priv->drm.struct_mutex);
	}

	ggtt->base.cleanup(&ggtt->base);

	arch_phys_wc_del(ggtt->mtrr);
	io_mapping_fini(&ggtt->mappable);
}

Contributors
Person
Tokens
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CommitProp
daniel vetter
daniel vetter
73
46.20%
2
13.33%
chris wilson
chris wilson
40
25.32%
5
33.33%
matthew auld
matthew auld
19
12.03%
2
13.33%
joonas lahtinen
joonas lahtinen
18
11.39%
3
20.00%
imre deak
imre deak
4
2.53%
1
6.67%
yu zhang
yu zhang
3
1.90%
1
6.67%
zhi wang
zhi wang
1
0.63%
1
6.67%
Total
158
100.00%
15
100.00%



static unsigned int gen6_get_total_gtt_size(u16 snb_gmch_ctl)
{
	snb_gmch_ctl >>= SNB_GMCH_GGMS_SHIFT;
	snb_gmch_ctl &= SNB_GMCH_GGMS_MASK;
	return snb_gmch_ctl << 20;
}

Contributors
Person
Tokens
Prop
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CommitProp
ben widawsky
ben widawsky
23
100.00%
1
100.00%
Total
23
100.00%
1
100.00%



static unsigned int gen8_get_total_gtt_size(u16 bdw_gmch_ctl)
{
	bdw_gmch_ctl >>= BDW_GMCH_GGMS_SHIFT;
	bdw_gmch_ctl &= BDW_GMCH_GGMS_MASK;
	if (bdw_gmch_ctl)
		bdw_gmch_ctl = 1 << bdw_gmch_ctl;

#ifdef CONFIG_X86_32
	/* Limit 32b platforms to a 2GB GGTT: 4 << 20 / pte size * PAGE_SIZE */
	if (bdw_gmch_ctl > 4)
		bdw_gmch_ctl = 4;
#endif

	return bdw_gmch_ctl << 20;
}

Contributors
Person
Tokens
Prop
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CommitProp
ben widawsky
ben widawsky
49
100.00%
3
100.00%
Total
49
100.00%
3
100.00%



static unsigned int chv_get_total_gtt_size(u16 gmch_ctrl)
{
	gmch_ctrl >>= SNB_GMCH_GGMS_SHIFT;
	gmch_ctrl &= SNB_GMCH_GGMS_MASK;

	if (gmch_ctrl)
		return 1 << (20 + gmch_ctrl);

	return 0;
}

Contributors
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Tokens
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damien lespiau
damien lespiau
34
100.00%
1
100.00%
Total
34
100.00%
1
100.00%



static size_t gen6_get_stolen_size(u16 snb_gmch_ctl)
{
	snb_gmch_ctl >>= SNB_GMCH_GMS_SHIFT;
	snb_gmch_ctl &= SNB_GMCH_GMS_MASK;
	return snb_gmch_ctl << 25; /* 32 MB units */
}

Contributors
Person
Tokens
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ben widawsky
ben widawsky
23
100.00%
2
100.00%
Total
23
100.00%
2
100.00%



static size_t gen8_get_stolen_size(u16 bdw_gmch_ctl)
{
	bdw_gmch_ctl >>= BDW_GMCH_GMS_SHIFT;
	bdw_gmch_ctl &= BDW_GMCH_GMS_MASK;
	return bdw_gmch_ctl << 25; /* 32 MB units */
}

Contributors
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Tokens
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ben widawsky
ben widawsky
23
100.00%
1
100.00%
Total
23
100.00%
1
100.00%



static size_t chv_get_stolen_size(u16 gmch_ctrl)
{
	gmch_ctrl >>= SNB_GMCH_GMS_SHIFT;
	gmch_ctrl &= SNB_GMCH_GMS_MASK;

	/*
         * 0x0  to 0x10: 32MB increments starting at 0MB
         * 0x11 to 0x16: 4MB increments starting at 8MB
         * 0x17 to 0x1d: 4MB increments start at 36MB
         */
	if (gmch_ctrl < 0x11)
		return gmch_ctrl << 25;
	else if (gmch_ctrl < 0x17)
		return (gmch_ctrl - 0x11 + 2) << 22;
	else
		return (gmch_ctrl - 0x17 + 9) << 22;
}

Contributors
Person
Tokens
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damien lespiau
damien lespiau
59
100.00%
1
100.00%
Total
59
100.00%
1
100.00%



static size_t gen9_get_stolen_size(u16 gen9_gmch_ctl)
{
	gen9_gmch_ctl >>= BDW_GMCH_GMS_SHIFT;
	gen9_gmch_ctl &= BDW_GMCH_GMS_MASK;

	if (gen9_gmch_ctl < 0xf0)
		return gen9_gmch_ctl << 25; /* 32 MB units */
	else
		/* 4MB increments starting at 0xf0 for 4MB */
		return (gen9_gmch_ctl - 0xf0 + 1) << 22;
}

Contributors
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damien lespiau
damien lespiau
42
100.00%
1
100.00%
Total
42
100.00%
1
100.00%



static int ggtt_probe_common(struct i915_ggtt *ggtt, u64 size)
{
	struct drm_i915_private *dev_priv = to_i915(ggtt->base.dev);
	struct pci_dev *pdev = ggtt->base.dev->pdev;
	phys_addr_t phys_addr;
	int ret;

	/* For Modern GENs the PTEs and register space are split in the BAR */
	phys_addr = pci_resource_start(pdev, 0) + pci_resource_len(pdev, 0) / 2;

	/*
         * On BXT writes larger than 64 bit to the GTT pagetable range will be
         * dropped. For WC mappings in general we have 64 byte burst writes
         * when the WC buffer is flushed, so we can't use it, but have to
         * resort to an uncached mapping. The WC issue is easily caught by the
         * readback check when writing GTT PTE entries.
         */
	if (IS_BROXTON(dev_priv))
		ggtt->gsm = ioremap_nocache(phys_addr, size);
	else
		ggtt->gsm = ioremap_wc(phys_addr, size);
	if (!ggtt->gsm) {
		DRM_ERROR("Failed to map the ggtt page table\n");
		return -ENOMEM;
	}

	ret = setup_scratch_page(dev_priv, &ggtt->base.scratch_page, GFP_DMA32);
	if (ret) {
		DRM_ERROR("Scratch setup failed\n");
		/* iounmap will also get called at remove, but meh */
		iounmap(ggtt->gsm);
		return ret;
	}

	return 0;
}

Contributors
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CommitProp
ben widawsky
ben widawsky
75
48.08%
6
37.50%
chris wilson
chris wilson
39
25.00%
4
25.00%
tvrtko ursulin
tvrtko ursulin
17
10.90%
2
12.50%
imre deak
imre deak
14
8.97%
1
6.25%
joonas lahtinen
joonas lahtinen
8
5.13%
2
12.50%
mika kuoppala
mika kuoppala
3
1.92%
1
6.25%
Total
156
100.00%
16
100.00%

/* The GGTT and PPGTT need a private PPAT setup in order to handle cacheability
 * bits. When using advanced contexts each context stores its own PAT, but
 * writing this data shouldn't be harmful even in those cases. */


static void bdw_setup_private_ppat(struct drm_i915_private *dev_priv)
{
	uint64_t pat;

	pat = GEN8_PPAT(0, GEN8_PPAT_WB | GEN8_PPAT_LLC)     | /* for normal objects, no eLLC */
	      GEN8_PPAT(1, GEN8_PPAT_WC | GEN8_PPAT_LLCELLC) | /* for something pointing to ptes? */
	      GEN8_PPAT(2, GEN8_PPAT_WT | GEN8_PPAT_LLCELLC) | /* for scanout with eLLC */
	      GEN8_PPAT(3, GEN8_PPAT_UC)                     | /* Uncached objects, mostly for scanout */
	      GEN8_PPAT(4, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(0)) |
	      GEN8_PPAT(5, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(1)) |
	      GEN8_PPAT(6, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(2)) |
	      GEN8_PPAT(7, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(3));

	if (!USES_PPGTT(dev_priv))
		/* Spec: "For GGTT, there is NO pat_sel[2:0] from the entry,
                 * so RTL will always use the value corresponding to
                 * pat_sel = 000".
                 * So let's disable cache for GGTT to avoid screen corruptions.
                 * MOCS still can be used though.
                 * - System agent ggtt writes (i.e. cpu gtt mmaps) already work
                 * before this patch, i.e. the same uncached + snooping access
                 * like on gen6/7 seems to be in effect.
                 * - So this just fixes blitter/render access. Again it looks
                 * like it's not just uncached access, but uncached + snooping.
                 * So we can still hold onto all our assumptions wrt cpu
                 * clflushing on LLC machines.
                 */
		pat = GEN8_PPAT(0, GEN8_PPAT_UC);

	/* XXX: spec defines this as 2 distinct registers. It's unclear if a 64b
         * write would work. */
	I915_WRITE(GEN8_PRIVATE_PAT_LO, pat);
	I915_WRITE(GEN8_PRIVATE_PAT_HI, pat >> 32);
}

Contributors
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ben widawsky
ben widawsky
124
85.52%
2
40.00%
rodrigo vivi
rodrigo vivi
18
12.41%
1
20.00%
ville syrjala
ville syrjala
3
2.07%
2
40.00%
Total
145
100.00%
5
100.00%



static void chv_setup_private_ppat(struct drm_i915_private *dev_priv)
{
	uint64_t pat;

	/*
         * Map WB on BDW to snooped on CHV.
         *
         * Only the snoop bit has meaning for CHV, the rest is
         * ignored.
         *
         * The hardware will never snoop for certain types of accesses:
         * - CPU GTT (GMADR->GGTT->no snoop->memory)
         * - PPGTT page tables
         * - some other special cycles
         *
         * As with BDW, we also need to consider the following for GT accesses:
         * "For GGTT, there is NO pat_sel[2:0] from the entry,
         * so RTL will always use the value corresponding to
         * pat_sel = 000".
         * Which means we must set the snoop bit in PAT entry 0
         * in order to keep the global status page working.
         */
	pat = GEN8_PPAT(0, CHV_PPAT_SNOOP) |
	      GEN8_PPAT(1, 0) |
	      GEN8_PPAT(2, 0) |
	      GEN8_PPAT(3, 0) |
	      GEN8_PPAT(4, CHV_PPAT_SNOOP) |
	      GEN8_PPAT(5, CHV_PPAT_SNOOP) |
	      GEN8_PPAT(6, CHV_PPAT_SNOOP) |
	      GEN8_PPAT(7, CHV_PPAT_SNOOP);

	I915_WRITE(GEN8_PRIVATE_PAT_LO, pat);
	I915_WRITE(GEN8_PRIVATE_PAT_HI, pat >> 32);
}

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ville syrjala
ville syrjala
89
100.00%
3
100.00%
Total
89
100.00%
3
100.00%



static void gen6_gmch_remove(struct i915_address_space *vm)
{
	struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);

	iounmap(ggtt->gsm);
	cleanup_scratch_page(to_i915(vm->dev), &vm->scratch_page);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
chris wilson
chris wilson
40
93.02%
2
66.67%
tvrtko ursulin
tvrtko ursulin
3
6.98%
1
33.33%
Total
43
100.00%
3
100.00%



static int gen8_gmch_probe(struct i915_ggtt *ggtt)
{
	struct drm_i915_private *dev_priv = to_i915(ggtt->base.dev);
	struct pci_dev *pdev = dev_priv->drm.pdev;
	unsigned int size;
	u16 snb_gmch_ctl;

	/* TODO: We're not aware of mappable constraints on gen8 yet */
	ggtt->mappable_base = pci_resource_start(pdev, 2);
	ggtt->mappable_end = pci_resource_len(pdev, 2);

	if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(39)))
		pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(39));

	pci_read_config_word(pdev, SNB_GMCH_CTRL, &snb_gmch_ctl);

	if (INTEL_GEN(dev_priv) >= 9) {
		ggtt->stolen_size = gen9_get_stolen_size(snb_gmch_ctl);
		size = gen8_get_total_gtt_size(snb_gmch_ctl);
	} else if (IS_CHERRYVIEW(dev_priv)) {
		ggtt->stolen_size = chv_get_stolen_size(snb_gmch_ctl);
		size = chv_get_total_gtt_size(snb_gmch_ctl);
	} else {
		ggtt->stolen_size = gen8_get_stolen_size(snb_gmch_ctl);
		size = gen8_get_total_gtt_size(snb_gmch_ctl);
	}

	ggtt->base.total = (size / sizeof(gen8_pte_t)) << PAGE_SHIFT;

	if (IS_CHERRYVIEW(dev_priv) || IS_BROXTON(dev_priv))
		chv_setup_private_ppat(dev_priv);
	else
		bdw_setup_private_ppat(dev_priv);

	ggtt->base.cleanup = gen6_gmch_remove;
	ggtt->base.bind_vma = ggtt_bind_vma;
	ggtt->base.unbind_vma = ggtt_unbind_vma;
	ggtt->base.insert_page = gen8_ggtt_insert_page;
	ggtt->base.clear_range = nop_clear_range;
	if (!USES_FULL_PPGTT(dev_priv) || intel_scanout_needs_vtd_wa(dev_priv))
		ggtt->base.clear_range = gen8_ggtt_clear_range;

	ggtt->base.insert_entries = gen8_ggtt_insert_entries;
	if (IS_CHERRYVIEW(dev_priv))
		ggtt->base.insert_entries = gen8_ggtt_insert_entries__BKL;

	return ggtt_probe_common(ggtt, size);
}

Contributors
Person
Tokens
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Commits
CommitProp
ben widawsky
ben widawsky
110
36.30%
7
35.00%
chris wilson
chris wilson
75
24.75%
5
25.00%
joonas lahtinen
joonas lahtinen
51
16.83%
2
10.00%
damien lespiau
damien lespiau
45
14.85%
2
10.00%
ville syrjala
ville syrjala
13
4.29%
1
5.00%
sumit singh
sumit singh
4
1.32%
1
5.00%
daniel vetter
daniel vetter
4
1.32%
1
5.00%
michel thierry
michel thierry
1
0.33%
1
5.00%
Total
303
100.00%
20
100.00%



static int gen6_gmch_probe(struct i915_ggtt *ggtt)
{
	struct drm_i915_private *dev_priv = to_i915(ggtt->base.dev);
	struct pci_dev *pdev = dev_priv->drm.pdev;
	unsigned int size;
	u16 snb_gmch_ctl;

	ggtt->mappable_base = pci_resource_start(pdev, 2);
	ggtt->mappable_end = pci_resource_len(pdev, 2);

	/* 64/512MB is the current min/max we actually know of, but this is just
         * a coarse sanity check.
         */
	if (ggtt->mappable_end < (64<<20) || ggtt->mappable_end > (512<<20)) {
		DRM_ERROR("Unknown GMADR size (%llx)\n", ggtt->mappable_end);
		return -ENXIO;
	}

	if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(40)))
		pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
	pci_read_config_word(pdev, SNB_GMCH_CTRL, &snb_gmch_ctl);

	ggtt->stolen_size = gen6_get_stolen_size(snb_gmch_ctl);

	size = gen6_get_total_gtt_size(snb_gmch_ctl);
	ggtt->base.total = (size / sizeof(gen6_pte_t)) << PAGE_SHIFT;

	ggtt->base.clear_range = gen6_ggtt_clear_range;
	ggtt->base.insert_page = gen6_ggtt_insert_page;
	ggtt->base.insert_entries = gen6_ggtt_insert_entries;
	ggtt->base.bind_vma = ggtt_bind_vma;
	ggtt->base.unbind_vma = ggtt_unbind_vma;
	ggtt->base.cleanup = gen6_gmch_remove;

	if (HAS_EDRAM(dev_priv))
		ggtt->base.pte_encode = iris_pte_encode;
	else if (IS_HASWELL(dev_priv))
		ggtt->base.pte_encode = hsw_pte_encode;
	else if (IS_VALLEYVIEW(dev_priv))
		ggtt->base.pte_encode = byt_pte_encode;
	else if (INTEL_GEN(dev_priv) >= 7)
		ggtt->base.pte_encode = ivb_pte_encode;
	else
		ggtt->base.pte_encode = snb_pte_encode;

	return ggtt_probe_common(ggtt, size);
}

Contributors
Person
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ben widawsky
ben widawsky
134
44.82%
9
52.94%
chris wilson
chris wilson
116
38.80%
3
17.65%
joonas lahtinen
joonas lahtinen
35
11.71%
2
11.76%
daniel vetter
daniel vetter
12
4.01%
1
5.88%
michel thierry
michel thierry
1
0.33%
1
5.88%
mika kuoppala
mika kuoppala
1
0.33%
1
5.88%
Total
299
100.00%
17
100.00%



static void i915_gmch_remove(struct i915_address_space *vm)
{
	intel_gmch_remove();
}

Contributors
Person
Tokens
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Commits
CommitProp
ben widawsky
ben widawsky
10
71.43%
3
60.00%
chris wilson
chris wilson
3
21.43%
1
20.00%
changlong xie
changlong xie
1
7.14%
1
20.00%
Total
14
100.00%
5
100.00%



static int i915_gmch_probe(struct i915_ggtt *ggtt)
{
	struct drm_i915_private *dev_priv = to_i915(ggtt->base.dev);
	int ret;

	ret = intel_gmch_probe(dev_priv->bridge_dev, dev_priv->drm.pdev, NULL);
	if (!ret) {
		DRM_ERROR("failed to set up gmch\n");
		return -EIO;
	}

	intel_gtt_get(&ggtt->base.total, &ggtt->stolen_size,
		      &ggtt->mappable_base, &ggtt->mappable_end);

	ggtt->do_idle_maps = needs_idle_maps(dev_priv);
	ggtt->base.insert_page = i915_ggtt_insert_page;
	ggtt->base.insert_entries = i915_ggtt_insert_entries;
	ggtt->base.clear_range = i915_ggtt_clear_range;
	ggtt->base.bind_vma = ggtt_bind_vma;
	ggtt->base.unbind_vma = ggtt_unbind_vma;
	ggtt->base.cleanup = i915_gmch_remove;

	if (unlikely(ggtt->do_idle_maps))
		DRM_INFO("applying Ironlake quirks for intel_iommu\n");

	return 0;
}

Contributors
Person
Tokens
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CommitProp
ben widawsky
ben widawsky
73
45.62%
5
31.25%
chris wilson
chris wilson
34
21.25%
5
31.25%
joonas lahtinen
joonas lahtinen
33
20.62%
3
18.75%
daniel vetter
daniel vetter
20
12.50%
3
18.75%
Total
160
100.00%
16
100.00%

/**
 * i915_ggtt_probe_hw - Probe GGTT hardware location
 * @dev_priv: i915 device
 */


int i915_ggtt_probe_hw(struct drm_i915_private *dev_priv)
{
	struct i915_ggtt *ggtt = &dev_priv->ggtt;
	int ret;

	ggtt->base.dev = &dev_priv->drm;

	if (INTEL_GEN(dev_priv) <= 5)
		ret = i915_gmch_probe(ggtt);
	else if (INTEL_GEN(dev_priv) < 8)
		ret = gen6_gmch_probe(ggtt);
	else
		ret = gen8_gmch_probe(ggtt);
	if (ret)
		return ret;

	if ((ggtt->base.total - 1) >> 32) {
		DRM_ERROR("We never expected a Global GTT with more than 32bits"
			  " of address space! Found %lldM!\n",
			  ggtt->base.total >> 20);
		ggtt->base.total = 1ULL << 32;
		ggtt->mappable_end = min(ggtt->mappable_end, ggtt->base.total);
	}

	if (ggtt->mappable_end > ggtt->base.total) {
		DRM_ERROR("mappable aperture extends past end of GGTT,"
			  " aperture=%llx, total=%llx\n",
			  ggtt->mappable_end, ggtt->base.total);
		ggtt->mappable_end = ggtt->base.total;
	}

	/* GMADR is the PCI mmio aperture into the global GTT. */
	DRM_INFO("Memory usable by graphics device = %lluM\n",
		 ggtt->base.total >> 20);
	DRM_DEBUG_DRIVER("GMADR size = %lldM\n", ggtt->mappable_end >> 20);
	DRM_DEBUG_DRIVER("GTT stolen size = %zdM\n", ggtt->stolen_size >> 20);
#ifdef CONFIG_INTEL_IOMMU
	if (intel_iommu_gfx_mapped)
		DRM_INFO("VT-d active for gfx access\n");
#endif

	return 0;
}

Contributors
Person
Tokens
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CommitProp
chris wilson
chris wilson
127
54.74%
6
33.33%
ben widawsky
ben widawsky
72
31.03%
6
33.33%
daniel vetter
daniel vetter
14
6.03%
1
5.56%
joonas lahtinen
joonas lahtinen
10
4.31%
1
5.56%
kenneth graunke
kenneth graunke
7
3.02%
3
16.67%
mika kuoppala
mika kuoppala
2
0.86%
1
5.56%
Total
232
100.00%
18
100.00%

/**
 * i915_ggtt_init_hw - Initialize GGTT hardware
 * @dev_priv: i915 device
 */


int i915_ggtt_init_hw(struct drm_i915_private *dev_priv)
{
	struct i915_ggtt *ggtt = &dev_priv->ggtt;
	int ret;

	INIT_LIST_HEAD(&dev_priv->vm_list);

	/* Subtract the guard page before address space initialization to
         * shrink the range used by drm_mm.
         */
	mutex_lock(&dev_priv->drm.struct_mutex);
	ggtt->base.total -= PAGE_SIZE;
	i915_address_space_init(&ggtt->base, dev_priv, "[global]");
	ggtt->base.total += PAGE_SIZE;
	if (!HAS_LLC(dev_priv))
		ggtt->base.mm.color_adjust = i915_gtt_color_adjust;
	mutex_unlock(&dev_priv->drm.struct_mutex);

	if (!io_mapping_init_wc(&dev_priv->ggtt.mappable,
				dev_priv->ggtt.mappable_base,
				dev_priv->ggtt.mappable_end)) {
		ret = -EIO;
		goto out_gtt_cleanup;
	}

	ggtt->mtrr = arch_phys_wc_add(ggtt->mappable_base, ggtt->mappable_end);

	/*
         * Initialise stolen early so that we may reserve preallocated
         * objects for the BIOS to KMS transition.
         */
	ret = i915_gem_init_stolen(dev_priv);
	if (ret)
		goto out_gtt_cleanup;

	return 0;

out_gtt_cleanup:
	ggtt->base.cleanup(&ggtt->base);
	return ret;
}

Contributors
Person
Tokens
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Commits
CommitProp
chris wilson
chris wilson
165
90.16%
5
55.56%
imre deak
imre deak
14
7.65%
1
11.11%
joonas lahtinen
joonas lahtinen
3
1.64%
2
22.22%
ben widawsky
ben widawsky
1
0.55%
1
11.11%
Total
183
100.00%
9
100.00%



int i915_ggtt_enable_hw(struct drm_i915_private *dev_priv)
{
	if (INTEL_GEN(dev_priv) < 6 && !intel_enable_gtt())
		return -EIO;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ville syrjala
ville syrjala
26
86.67%
1
50.00%
chris wilson
chris wilson
4
13.33%
1
50.00%
Total
30
100.00%
2
100.00%



void i915_gem_restore_gtt_mappings(struct drm_i915_private *dev_priv)
{
	struct i915_ggtt *ggtt = &dev_priv->ggtt;
	struct drm_i915_gem_object *obj, *on;

	i915_check_and_clear_faults(dev_priv);

	/* First fill our portion of the GTT with scratch pages */
	ggtt->base.clear_range(&ggtt->base, ggtt->base.start, ggtt->base.total);

	ggtt->base.closed = true; /* skip rewriting PTE on VMA unbind */

	/* clflush objects bound into the GGTT and rebind them. */
	list_for_each_entry_safe(obj, on,
				 &dev_priv->mm.bound_list, global_link) {
		bool ggtt_bound = false;
		struct i915_vma *vma;

		list_for_each_entry(vma, &obj->vma_list, obj_link) {
			if (vma->vm != &ggtt->base)
				continue;

			if (!i915_vma_unbind(vma))
				continue;

			WARN_ON(i915_vma_bind(vma, obj->cache_level,
					      PIN_UPDATE));
			ggtt_bound = true;
		}

		if (ggtt_bound)
			WARN_ON(i915_gem_object_set_to_gtt_domain(obj, false));
	}

	ggtt->base.closed = false;

	if (INTEL_GEN(dev_priv) >= 8) {
		if (IS_CHERRYVIEW(dev_priv) || IS_BROXTON(dev_priv))
			chv_setup_private_ppat(dev_priv);
		else
			bdw_setup_private_ppat(dev_priv);

		return;
	}

	if (USES_PPGTT(dev_priv)) {
		struct i915_address_space *vm;

		list_for_each_entry(vm, &dev_priv->vm_list, global_link) {
			/* TODO: Perhaps it shouldn't be gen6 specific */

			struct i915_hw_ppgtt *ppgtt;

			if (i915_is_ggtt(vm))
				ppgtt = dev_priv->mm.aliasing_ppgtt;
			else
				ppgtt = i915_vm_to_ppgtt(vm);

			gen6_write_page_range(dev_priv, &ppgtt->pd,
					      0, ppgtt->base.total);
		}
	}

	i915_ggtt_flush(dev_priv);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
daniel vetter
daniel vetter
154
56.62%
1
7.69%
chris wilson
chris wilson
57
20.96%
5
38.46%
joonas lahtinen
joonas lahtinen
35
12.87%
4
30.77%
tvrtko ursulin
tvrtko ursulin
26
9.56%
3
23.08%
Total
272
100.00%
13
100.00%


struct i915_vma *

i915_gem_obj_to_vma(struct drm_i915_gem_object *obj,
		    struct i915_address_space *vm,
		    const struct i915_ggtt_view *view)
{
	struct rb_node *rb;

	rb = obj->vma_tree.rb_node;
	while (rb) {
		struct i915_vma *vma = rb_entry(rb, struct i915_vma, obj_node);
		long cmp;

		cmp = i915_vma_compare(vma, vm, view);
		if (cmp == 0)
			return vma;

		if (cmp < 0)
			rb = rb->rb_right;
		else
			rb = rb->rb_left;
	}

	return NULL;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
joonas lahtinen
joonas lahtinen
61
59.80%
1
25.00%
chris wilson
chris wilson
41
40.20%
3
75.00%
Total
102
100.00%
4
100.00%


struct i915_vma *

i915_gem_obj_lookup_or_create_vma(struct drm_i915_gem_object *obj,
				  struct i915_address_space *vm,
				  const struct i915_ggtt_view *view)
{
	struct i915_vma *vma;

	lockdep_assert_held(&obj->base.dev->struct_mutex);
	GEM_BUG_ON(view && !i915_is_ggtt(vm));

	vma = i915_gem_obj_to_vma(obj, vm, view);
	if (!vma) {
		vma = i915_vma_create(obj, vm, view);
		GEM_BUG_ON(vma != i915_gem_obj_to_vma(obj, vm, view));
	}

	GEM_BUG_ON(i915_vma_is_closed(vma));
	return vma;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
joonas lahtinen
joonas lahtinen
58
55.24%
1
20.00%
chris wilson
chris wilson
47
44.76%
4
80.00%
Total
105
100.00%
5
100.00%


static struct scatterlist *

rotate_pages(const dma_addr_t *in, unsigned int offset,
	     unsigned int width, unsigned int height,
	     unsigned int stride,
	     struct sg_table *st, struct scatterlist *sg)
{
	unsigned int column, row;
	unsigned int src_idx;

	for (column = 0; column < width; column++) {
		src_idx = stride * (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[offset + src_idx];
			sg_dma_len(sg) = PAGE_SIZE;
			sg = sg_next(sg);
			src_idx -= stride;
		}
	}

	return sg;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
joonas lahtinen
joonas lahtinen
121
85.82%
1
20.00%
chris wilson
chris wilson
20
14.18%
4
80.00%
Total
141
100.00%
5
100.00%


static struct sg_table *

intel_rotate_fb_obj_pages(const struct intel_rotation_info *rot_info,
			  struct drm_i915_gem_object *obj)
{
	const size_t n_pages = obj->base.size / PAGE_SIZE;
	unsigned int size = intel_rotation_info_size(rot_info);
	struct sgt_iter sgt_iter;
	dma_addr_t dma_addr;
	unsigned long i;
	dma_addr_t *page_addr_list;
	struct sg_table *st;
	struct scatterlist *sg;
	int ret = -ENOMEM;

	/* Allocate a temporary list of source pages for random access. */
	page_addr_list = drm_malloc_gfp(n_pages,
					sizeof(dma_addr_t),
					GFP_TEMPORARY);
	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, size, GFP_KERNEL);
	if (ret)
		goto err_sg_alloc;

	/* Populate source page list from the object. */
	i = 0;
	for_each_sgt_dma(dma_addr, sgt_iter, obj->mm.pages)
		page_addr_list[i++] = dma_addr;

	GEM_BUG_ON(i != n_pages);
	st->nents = 0;
	sg = st->sgl;

	for (i = 0 ; i < ARRAY_SIZE(rot_info->plane); i++) {
		sg = rotate_pages(page_addr_list, rot_info->plane[i].offset,
				  rot_info->plane[i].width, rot_info->plane[i].height,
				  rot_info->plane[i].stride, st, sg);
	}

	DRM_DEBUG_KMS("Created rotated page mapping for object size %zu (%ux%u tiles, %u pages)\n",
		      obj->base.size, rot_info->plane[0].width, rot_info->plane[0].height, size);

	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 %zu! (%ux%u tiles, %u pages)\n",
		      obj->base.size, rot_info->plane[0].width, rot_info->plane[0].height, size);

	return ERR_PTR(ret);
}

Contributors
Person
Tokens
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Commits
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joonas lahtinen
joonas lahtinen
195
58.38%
2
10.53%
tvrtko ursulin
tvrtko ursulin
45
13.47%
5
26.32%
chris wilson
chris wilson
39
11.68%
6
31.58%
ville syrjala
ville syrjala
27
8.08%
3
15.79%
ben widawsky
ben widawsky
15
4.49%
1
5.26%
dave gordon
dave gordon
10
2.99%
1
5.26%
dan carpenter
dan carpenter
3
0.90%
1
5.26%
Total
334
100.00%
19
100.00%


static struct sg_table *

intel_partial_pages(const struct i915_ggtt_view *view,
		    struct drm_i915_gem_object *obj)
{
	struct sg_table *st;
	struct scatterlist *sg, *iter;
	unsigned int count = view->params.partial.size;
	unsigned int offset;
	int ret = -ENOMEM;

	st = kmalloc(sizeof(*st), GFP_KERNEL);
	if (!st)
		goto err_st_alloc;

	ret = sg_alloc_table(st, count, GFP_KERNEL);
	if (ret)
		goto err_sg_alloc;

	iter = i915_gem_object_get_sg(obj,
				      view->params.partial.offset,
				      &offset);
	GEM_BUG_ON(!iter);

	sg = st->sgl;
	st->nents = 0;
	do {
		unsigned int len;

		len = min(iter->length - (offset << PAGE_SHIFT),
			  count << PAGE_SHIFT);
		sg_set_page(sg, NULL, len, 0);
		sg_dma_address(sg) =
			sg_dma_address(iter) + (offset << PAGE_SHIFT);
		sg_dma_len(sg) = len;

		st->nents++;
		count -= len >> PAGE_SHIFT;
		if (count == 0) {
			sg_mark_end(sg);
			return st;
		}

		sg = __sg_next(sg);
		iter = __sg_next(iter);
		offset = 0;
	} while (1);

err_sg_alloc:
	kfree(st);
err_st_alloc:
	return ERR_PTR(ret);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
joonas lahtinen
joonas lahtinen
179
70.47%
2
16.67%
tvrtko ursulin
tvrtko ursulin
43
16.93%
2
16.67%
mika kuoppala
mika kuoppala
16
6.30%
2
16.67%
chris wilson
chris wilson
8
3.15%
3
25.00%
ben widawsky
ben widawsky
4
1.57%
1
8.33%
daniel vetter
daniel vetter
4
1.57%
2
16.67%
Total
254
100.00%
12
100.00%


static int

i915_get_ggtt_vma_pages(struct i915_vma *vma)
{
	int ret = 0;

	/* The vma->pages are only valid within the lifespan of the borrowed
         * obj->mm.pages. When the obj->mm.pages sg_table is regenerated, so
         * must be the vma->pages. A simple rule is that vma->pages must only
         * be accessed when the obj->mm.pages are pinned.
         */
	GEM_BUG_ON(!i915_gem_object_has_pinned_pages(vma->obj));

	if (vma->pages)
		return 0;

	if (vma->ggtt_view.type == I915_GGTT_VIEW_NORMAL)
		vma->pages = vma->obj->mm.pages;
	else if (vma->ggtt_view.type == I915_GGTT_VIEW_ROTATED)
		vma->pages =
			intel_rotate_fb_obj_pages(&vma->ggtt_view.params.rotated, vma->obj);
	else if (vma->ggtt_view.type == I915_GGTT_VIEW_PARTIAL)
		vma->pages = intel_partial_pages(&vma->ggtt_view, vma->obj);
	else
		WARN_ONCE(1, "GGTT view %u not implemented!\n",
			  vma->ggtt_view.type);

	if (!vma->pages) {
		DRM_ERROR("Failed to get pages for GGTT view type %u!\n",
			  vma->ggtt_view.type);
		ret = -EINVAL;
	} else if (IS_ERR(vma->pages)) {
		ret = PTR_ERR(vma->pages);
		vma->pages = NULL;
		DRM_ERROR("Failed to get pages for VMA view type %u (%d)!\n",
			  vma->ggtt_view.type, ret);
	}

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
joonas lahtinen
joonas lahtinen
123
61.81%
1
14.29%
chris wilson
chris wilson
76
38.19%
6
85.71%
Total
199
100.00%
7
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
ben widawsky
ben widawsky
3719
23.79%
73
22.53%
michel thierry
michel thierry
3551
22.72%
29
8.95%
chris wilson
chris wilson
2212
14.15%
72
22.22%
daniel vetter
daniel vetter
1419
9.08%
34
10.49%
mika kuoppala
mika kuoppala
1122
7.18%
21
6.48%
joonas lahtinen
joonas lahtinen
1111
7.11%
11
3.40%
michal winiarski
michal winiarski
597
3.82%
4
1.23%
tvrtko ursulin
tvrtko ursulin
501
3.20%
19
5.86%
zhiyuan lv
zhiyuan lv
291
1.86%
2
0.62%
ville syrjala
ville syrjala
218
1.39%
13
4.01%
damien lespiau
damien lespiau
185
1.18%
3
0.93%
dave gordon
dave gordon
126
0.81%
3
0.93%
matthew auld
matthew auld
115
0.74%
5
1.54%
kenneth graunke
kenneth graunke
88
0.56%
3
0.93%
tim gore
tim gore
70
0.45%
1
0.31%
akash goel
akash goel
63
0.40%
2
0.62%
john harrison
john harrison
40
0.26%
4
1.23%
imre deak
imre deak
40
0.26%
4
1.23%
yu zhang
yu zhang
29
0.19%
2
0.62%
david weinehall
david weinehall
26
0.17%
2
0.62%
jesse barnes
jesse barnes
23
0.15%
1
0.31%
rodrigo vivi
rodrigo vivi
19
0.12%
2
0.62%
daniele ceraolo spurio
daniele ceraolo spurio
16
0.10%
1
0.31%
zhi wang
zhi wang
11
0.07%
2
0.62%
thomas daniel
thomas daniel
10
0.06%
1
0.31%
rafael barbalho
rafael barbalho
10
0.06%
1
0.31%
sumit singh
sumit singh
4
0.03%
1
0.31%
oscar mateo
oscar mateo
3
0.02%
1
0.31%
dan carpenter
dan carpenter
3
0.02%
1
0.31%
thierry reding
thierry reding
3
0.02%
1
0.31%
jani nikula
jani nikula
2
0.01%
1
0.31%
david howells
david howells
2
0.01%
1
0.31%
paulo zanoni
paulo zanoni
1
0.01%
1
0.31%
fengguang wu
fengguang wu
1
0.01%
1
0.31%
changlong xie
changlong xie
1
0.01%
1
0.31%
Total
15632
100.00%
324
100.00%
Directory: drivers/gpu/drm/i915

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