Release 4.17 drivers/gpu/drm/i915/i915_gem_stolen.c

/*
 * Copyright © 2008-2012 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.
 *
 * Authors:
 *    Eric Anholt <eric@anholt.net>
 *    Chris Wilson <chris@chris-wilson.co.uk>
 *
 */

#include <drm/drmP.h>
#include <drm/i915_drm.h>
#include "i915_drv.h"

/*
 * The BIOS typically reserves some of the system's memory for the exclusive
 * use of the integrated graphics. This memory is no longer available for
 * use by the OS and so the user finds that his system has less memory
 * available than he put in. We refer to this memory as stolen.
 *
 * The BIOS will allocate its framebuffer from the stolen memory. Our
 * goal is try to reuse that object for our own fbcon which must always
 * be available for panics. Anything else we can reuse the stolen memory
 * for is a boon.
 */



int i915_gem_stolen_insert_node_in_range(struct drm_i915_private *dev_priv,
					 struct drm_mm_node *node, u64 size,
					 unsigned alignment, u64 start, u64 end)
{
	int ret;

	if (!drm_mm_initialized(&dev_priv->mm.stolen))
		return -ENODEV;

	mutex_lock(&dev_priv->mm.stolen_lock);
	ret = drm_mm_insert_node_in_range(&dev_priv->mm.stolen, node,
					  size, alignment, 0,
					  start, end, DRM_MM_INSERT_BEST);
	mutex_unlock(&dev_priv->mm.stolen_lock);

	return ret;
}

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Paulo Zanoni
93
96.88%
3
75.00%
Chris Wilson
3
3.12%
1
25.00%
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96
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4
100.00%



int i915_gem_stolen_insert_node(struct drm_i915_private *dev_priv,
				struct drm_mm_node *node, u64 size,
				unsigned alignment)
{
	return i915_gem_stolen_insert_node_in_range(dev_priv, node, size,
						    alignment, 0, U64_MAX);
}

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37
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void i915_gem_stolen_remove_node(struct drm_i915_private *dev_priv,
				 struct drm_mm_node *node)
{
	mutex_lock(&dev_priv->mm.stolen_lock);
	drm_mm_remove_node(node);
	mutex_unlock(&dev_priv->mm.stolen_lock);
}

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static int i915_adjust_stolen(struct drm_i915_private *dev_priv,
			      struct resource *dsm)
{
	struct i915_ggtt *ggtt = &dev_priv->ggtt;
	struct resource *r;

	if (dsm->start == 0 || dsm->end <= dsm->start)
		return -EINVAL;

	/*
         * TODO: We have yet too encounter the case where the GTT wasn't at the
         * end of stolen. With that assumption we could simplify this.
         */

	/* Make sure we don't clobber the GTT if it's within stolen memory */
	if (INTEL_GEN(dev_priv) <= 4 &&
	    !IS_G33(dev_priv) && !IS_PINEVIEW(dev_priv) && !IS_G4X(dev_priv)) {
		struct resource stolen[2] = {*dsm, *dsm};
		struct resource ggtt_res;
		resource_size_t ggtt_start;

		ggtt_start = I915_READ(PGTBL_CTL);
		if (IS_GEN4(dev_priv))
			ggtt_start = (ggtt_start & PGTBL_ADDRESS_LO_MASK) |
				     (ggtt_start & PGTBL_ADDRESS_HI_MASK) << 28;
		else
			ggtt_start &= PGTBL_ADDRESS_LO_MASK;

		ggtt_res =
			(struct resource) DEFINE_RES_MEM(ggtt_start,
							 ggtt_total_entries(ggtt) * 4);

		if (ggtt_res.start >= stolen[0].start && ggtt_res.start < stolen[0].end)
			stolen[0].end = ggtt_res.start;
		if (ggtt_res.end > stolen[1].start && ggtt_res.end <= stolen[1].end)
			stolen[1].start = ggtt_res.end;

		/* Pick the larger of the two chunks */
		if (resource_size(&stolen[0]) > resource_size(&stolen[1]))
			*dsm = stolen[0];
		else
			*dsm = stolen[1];

		if (stolen[0].start != stolen[1].start ||
		    stolen[0].end != stolen[1].end) {
			DRM_DEBUG_KMS("GTT within stolen memory at %pR\n", &ggtt_res);
			DRM_DEBUG_KMS("Stolen memory adjusted to %pR\n", dsm);
		}
	}

	/*
         * Verify that nothing else uses this physical address. Stolen
         * memory should be reserved by the BIOS and hidden from the
         * kernel. So if the region is already marked as busy, something
         * is seriously wrong.
         */
	r = devm_request_mem_region(dev_priv->drm.dev, dsm->start,
				    resource_size(dsm),
				    "Graphics Stolen Memory");
	if (r == NULL) {
		/*
                 * One more attempt but this time requesting region from
                 * start + 1, as we have seen that this resolves the region
                 * conflict with the PCI Bus.
                 * This is a BIOS w/a: Some BIOS wrap stolen in the root
                 * PCI bus, but have an off-by-one error. Hence retry the
                 * reservation starting from 1 instead of 0.
                 * There's also BIOS with off-by-one on the other end.
                 */
		r = devm_request_mem_region(dev_priv->drm.dev, dsm->start + 1,
					    resource_size(dsm) - 2,
					    "Graphics Stolen Memory");
		/*
                 * GEN3 firmware likes to smash pci bridges into the stolen
                 * range. Apparently this works.
                 */
		if (r == NULL && !IS_GEN3(dev_priv)) {
			DRM_ERROR("conflict detected with stolen region: %pR\n",
				  dsm);

			return -EBUSY;
		}
	}

	return 0;
}

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Ville Syrjälä
184
46.12%
2
11.11%
Matthew Auld
105
26.32%
3
16.67%
Chris Wilson
39
9.77%
3
16.67%
Akash Goel
23
5.76%
1
5.56%
Joonas Lahtinen
18
4.51%
2
11.11%
Tvrtko A. Ursulin
14
3.51%
3
16.67%
Daniel Vetter
7
1.75%
2
11.11%
Jani Nikula
6
1.50%
1
5.56%
Paulo Zanoni
3
0.75%
1
5.56%
Total
399
100.00%
18
100.00%



void i915_gem_cleanup_stolen(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = to_i915(dev);

	if (!drm_mm_initialized(&dev_priv->mm.stolen))
		return;

	drm_mm_takedown(&dev_priv->mm.stolen);
}

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Daniel Vetter
31
70.45%
2
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Chris Wilson
13
29.55%
2
50.00%
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44
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4
100.00%



static void g4x_get_stolen_reserved(struct drm_i915_private *dev_priv,
				    resource_size_t *base, resource_size_t *size)
{
	uint32_t reg_val = I915_READ(IS_GM45(dev_priv) ?
				     CTG_STOLEN_RESERVED :
				     ELK_STOLEN_RESERVED);
	resource_size_t stolen_top = dev_priv->dsm.end + 1;

	if ((reg_val & G4X_STOLEN_RESERVED_ENABLE) == 0) {
		*base = 0;
		*size = 0;
		return;
	}

	/*
         * Whether ILK really reuses the ELK register for this is unclear.
         * Let's see if we catch anyone with this supposedly enabled on ILK.
         */
	WARN(IS_GEN5(dev_priv), "ILK stolen reserved found? 0x%08x\n", reg_val);

	*base = (reg_val & G4X_STOLEN_RESERVED_ADDR2_MASK) << 16;

	WARN_ON((reg_val & G4X_STOLEN_RESERVED_ADDR1_MASK) < *base);

	/* On these platforms, the register doesn't have a size field, so the
         * size is the distance between the base and the top of the stolen
         * memory. We also have the genuine case where base is zero and there's
         * nothing reserved. */
	if (*base == 0)
		*size = 0;
	else
		*size = stolen_top - *base;
}

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Ville Syrjälä
120
95.24%
3
60.00%
Matthew Auld
6
4.76%
2
40.00%
Total
126
100.00%
5
100.00%



static void gen6_get_stolen_reserved(struct drm_i915_private *dev_priv,
				     resource_size_t *base, resource_size_t *size)
{
	uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED);

	if ((reg_val & GEN6_STOLEN_RESERVED_ENABLE) == 0) {
		*base = 0;
		*size = 0;
		return;
	}

	*base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK;

	switch (reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK) {
	case GEN6_STOLEN_RESERVED_1M:
		*size = 1024 * 1024;
		break;
	case GEN6_STOLEN_RESERVED_512K:
		*size = 512 * 1024;
		break;
	case GEN6_STOLEN_RESERVED_256K:
		*size = 256 * 1024;
		break;
	case GEN6_STOLEN_RESERVED_128K:
		*size = 128 * 1024;
		break;
	default:
		*size = 1024 * 1024;
		MISSING_CASE(reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK);
	}
}

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Paulo Zanoni
99
79.84%
1
33.33%
Ville Syrjälä
23
18.55%
1
33.33%
Matthew Auld
2
1.61%
1
33.33%
Total
124
100.00%
3
100.00%



static void gen7_get_stolen_reserved(struct drm_i915_private *dev_priv,
				     resource_size_t *base, resource_size_t *size)
{
	uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED);

	if ((reg_val & GEN6_STOLEN_RESERVED_ENABLE) == 0) {
		*base = 0;
		*size = 0;
		return;
	}

	*base = reg_val & GEN7_STOLEN_RESERVED_ADDR_MASK;

	switch (reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK) {
	case GEN7_STOLEN_RESERVED_1M:
		*size = 1024 * 1024;
		break;
	case GEN7_STOLEN_RESERVED_256K:
		*size = 256 * 1024;
		break;
	default:
		*size = 1024 * 1024;
		MISSING_CASE(reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK);
	}
}

Contributors
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Paulo Zanoni
77
75.49%
1
33.33%
Ville Syrjälä
23
22.55%
1
33.33%
Matthew Auld
2
1.96%
1
33.33%
Total
102
100.00%
3
100.00%



static void chv_get_stolen_reserved(struct drm_i915_private *dev_priv,
				    resource_size_t *base, resource_size_t *size)
{
	uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED);

	if ((reg_val & GEN6_STOLEN_RESERVED_ENABLE) == 0) {
		*base = 0;
		*size = 0;
		return;
	}

	*base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK;

	switch (reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK) {
	case GEN8_STOLEN_RESERVED_1M:
		*size = 1024 * 1024;
		break;
	case GEN8_STOLEN_RESERVED_2M:
		*size = 2 * 1024 * 1024;
		break;
	case GEN8_STOLEN_RESERVED_4M:
		*size = 4 * 1024 * 1024;
		break;
	case GEN8_STOLEN_RESERVED_8M:
		*size = 8 * 1024 * 1024;
		break;
	default:
		*size = 8 * 1024 * 1024;
		MISSING_CASE(reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK);
	}
}

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Paulo Zanoni
106
80.30%
1
25.00%
Ville Syrjälä
23
17.42%
1
25.00%
Matthew Auld
2
1.52%
1
25.00%
Rodrigo Vivi
1
0.76%
1
25.00%
Total
132
100.00%
4
100.00%



static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv,
				    resource_size_t *base, resource_size_t *size)
{
	uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED);
	resource_size_t stolen_top;

	if ((reg_val & GEN6_STOLEN_RESERVED_ENABLE) == 0) {
		*base = 0;
		*size = 0;
		return;
	}

	stolen_top = dev_priv->dsm.end + 1;

	*base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK;

	/* On these platforms, the register doesn't have a size field, so the
         * size is the distance between the base and the top of the stolen
         * memory. We also have the genuine case where base is zero and there's
         * nothing reserved. */
	if (*base == 0)
		*size = 0;
	else
		*size = stolen_top - *base;
}

Contributors
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Paulo Zanoni
63
68.48%
1
25.00%
Ville Syrjälä
23
25.00%
1
25.00%
Matthew Auld
6
6.52%
2
50.00%
Total
92
100.00%
4
100.00%



int i915_gem_init_stolen(struct drm_i915_private *dev_priv)
{
	resource_size_t reserved_base, stolen_top;
	resource_size_t reserved_total, reserved_size;
	resource_size_t stolen_usable_start;

	mutex_init(&dev_priv->mm.stolen_lock);

	if (intel_vgpu_active(dev_priv)) {
		DRM_INFO("iGVT-g active, disabling use of stolen memory\n");
		return 0;
	}

	if (intel_vtd_active() && INTEL_GEN(dev_priv) < 8) {
		DRM_INFO("DMAR active, disabling use of stolen memory\n");
		return 0;
	}

	if (resource_size(&intel_graphics_stolen_res) == 0)
		return 0;

	dev_priv->dsm = intel_graphics_stolen_res;

	if (i915_adjust_stolen(dev_priv, &dev_priv->dsm))
		return 0;

	GEM_BUG_ON(dev_priv->dsm.start == 0);
	GEM_BUG_ON(dev_priv->dsm.end <= dev_priv->dsm.start);

	stolen_top = dev_priv->dsm.end + 1;
	reserved_base = 0;
	reserved_size = 0;

	switch (INTEL_GEN(dev_priv)) {
	case 2:
	case 3:
		break;
	case 4:
		if (!IS_G4X(dev_priv))
			break;
		/* fall through */
	case 5:
		g4x_get_stolen_reserved(dev_priv,
					&reserved_base, &reserved_size);
		break;
	case 6:
		gen6_get_stolen_reserved(dev_priv,
					 &reserved_base, &reserved_size);
		break;
	case 7:
		gen7_get_stolen_reserved(dev_priv,
					 &reserved_base, &reserved_size);
		break;
	default:
		if (IS_LP(dev_priv))
			chv_get_stolen_reserved(dev_priv,
						&reserved_base, &reserved_size);
		else
			bdw_get_stolen_reserved(dev_priv,
						&reserved_base, &reserved_size);
		break;
	}

	/* It is possible for the reserved base to be zero, but the register
         * field for size doesn't have a zero option. */
	if (reserved_base == 0) {
		reserved_size = 0;
		reserved_base = stolen_top;
	}

	dev_priv->dsm_reserved =
		(struct resource) DEFINE_RES_MEM(reserved_base, reserved_size);

	if (!resource_contains(&dev_priv->dsm, &dev_priv->dsm_reserved)) {
		DRM_ERROR("Stolen reserved area %pR outside stolen memory %pR\n",
			  &dev_priv->dsm_reserved, &dev_priv->dsm);
		return 0;
	}

	/* It is possible for the reserved area to end before the end of stolen
         * memory, so just consider the start. */
	reserved_total = stolen_top - reserved_base;

	DRM_DEBUG_KMS("Memory reserved for graphics device: %lluK, usable: %lluK\n",
		      (u64)resource_size(&dev_priv->dsm) >> 10,
		      ((u64)resource_size(&dev_priv->dsm) - reserved_total) >> 10);

	stolen_usable_start = 0;
	/* WaSkipStolenMemoryFirstPage:bdw+ */
	if (INTEL_GEN(dev_priv) >= 8)
		stolen_usable_start = 4096;

	dev_priv->stolen_usable_size =
		resource_size(&dev_priv->dsm) - reserved_total - stolen_usable_start;

	/* Basic memrange allocator for stolen space. */
	drm_mm_init(&dev_priv->mm.stolen, stolen_usable_start,
		    dev_priv->stolen_usable_size);

	return 0;
}

Contributors
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Paulo Zanoni
144
34.29%
4
12.90%
Matthew Auld
104
24.76%
4
12.90%
Chris Wilson
92
21.90%
7
22.58%
Daniel Vetter
31
7.38%
3
9.68%
Ville Syrjälä
26
6.19%
4
12.90%
Tvrtko A. Ursulin
7
1.67%
4
12.90%
Rodrigo Vivi
5
1.19%
2
6.45%
Jesse Barnes
5
1.19%
1
3.23%
Joonas Lahtinen
5
1.19%
1
3.23%
Ben Widawsky
1
0.24%
1
3.23%
Total
420
100.00%
31
100.00%


static struct sg_table *

i915_pages_create_for_stolen(struct drm_device *dev,
			     resource_size_t offset, resource_size_t size)
{
	struct drm_i915_private *dev_priv = to_i915(dev);
	struct sg_table *st;
	struct scatterlist *sg;

	GEM_BUG_ON(range_overflows(offset, size, resource_size(&dev_priv->dsm)));

	/* We hide that we have no struct page backing our stolen object
         * by wrapping the contiguous physical allocation with a fake
         * dma mapping in a single scatterlist.
         */

	st = kmalloc(sizeof(*st), GFP_KERNEL);
	if (st == NULL)
		return ERR_PTR(-ENOMEM);

	if (sg_alloc_table(st, 1, GFP_KERNEL)) {
		kfree(st);
		return ERR_PTR(-ENOMEM);
	}

	sg = st->sgl;
	sg->offset = 0;
	sg->length = size;

	sg_dma_address(sg) = (dma_addr_t)dev_priv->dsm.start + offset;
	sg_dma_len(sg) = size;

	return st;
}

Contributors
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Chris Wilson
118
77.12%
4
36.36%
Matthew Auld
20
13.07%
3
27.27%
Imre Deak
8
5.23%
2
18.18%
Joonas Lahtinen
6
3.92%
1
9.09%
Akash Goel
1
0.65%
1
9.09%
Total
153
100.00%
11
100.00%



static int i915_gem_object_get_pages_stolen(struct drm_i915_gem_object *obj)
{
	struct sg_table *pages =
		i915_pages_create_for_stolen(obj->base.dev,
					     obj->stolen->start,
					     obj->stolen->size);
	if (IS_ERR(pages))
		return PTR_ERR(pages);

	__i915_gem_object_set_pages(obj, pages, obj->stolen->size);

	return 0;
}

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Matthew Auld
36
54.55%
2
50.00%
Chris Wilson
30
45.45%
2
50.00%
Total
66
100.00%
4
100.00%



static void i915_gem_object_put_pages_stolen(struct drm_i915_gem_object *obj,
					     struct sg_table *pages)
{
	/* Should only be called from i915_gem_object_release_stolen() */
	sg_free_table(pages);
	kfree(pages);
}

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Chris Wilson
27
100.00%
3
100.00%
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27
100.00%
3
100.00%


static void

i915_gem_object_release_stolen(struct drm_i915_gem_object *obj)
{
	struct drm_i915_private *dev_priv = to_i915(obj->base.dev);
	struct drm_mm_node *stolen = fetch_and_zero(&obj->stolen);

	GEM_BUG_ON(!stolen);

	__i915_gem_object_unpin_pages(obj);

	i915_gem_stolen_remove_node(dev_priv, stolen);
	kfree(stolen);
}

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Chris Wilson
47
77.05%
4
80.00%
Paulo Zanoni
14
22.95%
1
20.00%
Total
61
100.00%
5
100.00%


static const struct drm_i915_gem_object_ops i915_gem_object_stolen_ops = {
	.get_pages = i915_gem_object_get_pages_stolen,
	.put_pages = i915_gem_object_put_pages_stolen,
	.release = i915_gem_object_release_stolen,
};


static struct drm_i915_gem_object *

_i915_gem_object_create_stolen(struct drm_i915_private *dev_priv,
			       struct drm_mm_node *stolen)
{
	struct drm_i915_gem_object *obj;
	unsigned int cache_level;

	obj = i915_gem_object_alloc(dev_priv);
	if (obj == NULL)
		return NULL;

	drm_gem_private_object_init(&dev_priv->drm, &obj->base, stolen->size);
	i915_gem_object_init(obj, &i915_gem_object_stolen_ops);

	obj->stolen = stolen;
	obj->read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT;
	cache_level = HAS_LLC(dev_priv) ? I915_CACHE_LLC : I915_CACHE_NONE;
	i915_gem_object_set_cache_coherency(obj, cache_level);

	if (i915_gem_object_pin_pages(obj))
		goto cleanup;

	return obj;

cleanup:
	i915_gem_object_free(obj);
	return NULL;
}

Contributors
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Chris Wilson
113
91.87%
6
66.67%
Tvrtko A. Ursulin
9
7.32%
2
22.22%
David Herrmann
1
0.81%
1
11.11%
Total
123
100.00%
9
100.00%


struct drm_i915_gem_object *

i915_gem_object_create_stolen(struct drm_i915_private *dev_priv,
			      resource_size_t size)
{
	struct drm_i915_gem_object *obj;
	struct drm_mm_node *stolen;
	int ret;

	if (!drm_mm_initialized(&dev_priv->mm.stolen))
		return NULL;

	if (size == 0)
		return NULL;

	stolen = kzalloc(sizeof(*stolen), GFP_KERNEL);
	if (!stolen)
		return NULL;

	ret = i915_gem_stolen_insert_node(dev_priv, stolen, size, 4096);
	if (ret) {
		kfree(stolen);
		return NULL;
	}

	obj = _i915_gem_object_create_stolen(dev_priv, stolen);
	if (obj)
		return obj;

	i915_gem_stolen_remove_node(dev_priv, stolen);
	kfree(stolen);
	return NULL;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Chris Wilson
83
62.88%
1
16.67%
David Herrmann
35
26.52%
1
16.67%
Daniel Vetter
6
4.55%
1
16.67%
Paulo Zanoni
4
3.03%
1
16.67%
Tvrtko A. Ursulin
3
2.27%
1
16.67%
Matthew Auld
1
0.76%
1
16.67%
Total
132
100.00%
6
100.00%


struct drm_i915_gem_object *

i915_gem_object_create_stolen_for_preallocated(struct drm_i915_private *dev_priv,
					       resource_size_t stolen_offset,
					       resource_size_t gtt_offset,
					       resource_size_t size)
{
	struct i915_ggtt *ggtt = &dev_priv->ggtt;
	struct drm_i915_gem_object *obj;
	struct drm_mm_node *stolen;
	struct i915_vma *vma;
	int ret;

	if (!drm_mm_initialized(&dev_priv->mm.stolen))
		return NULL;

	lockdep_assert_held(&dev_priv->drm.struct_mutex);

	DRM_DEBUG_KMS("creating preallocated stolen object: stolen_offset=%pa, gtt_offset=%pa, size=%pa\n",
			&stolen_offset, &gtt_offset, &size);

	/* KISS and expect everything to be page-aligned */
	if (WARN_ON(size == 0) ||
	    WARN_ON(!IS_ALIGNED(size, I915_GTT_PAGE_SIZE)) ||
	    WARN_ON(!IS_ALIGNED(stolen_offset, I915_GTT_MIN_ALIGNMENT)))
		return NULL;

	stolen = kzalloc(sizeof(*stolen), GFP_KERNEL);
	if (!stolen)
		return NULL;

	stolen->start = stolen_offset;
	stolen->size = size;
	mutex_lock(&dev_priv->mm.stolen_lock);
	ret = drm_mm_reserve_node(&dev_priv->mm.stolen, stolen);
	mutex_unlock(&dev_priv->mm.stolen_lock);
	if (ret) {
		DRM_DEBUG_KMS("failed to allocate stolen space\n");
		kfree(stolen);
		return NULL;
	}

	obj = _i915_gem_object_create_stolen(dev_priv, stolen);
	if (obj == NULL) {
		DRM_DEBUG_KMS("failed to allocate stolen object\n");
		i915_gem_stolen_remove_node(dev_priv, stolen);
		kfree(stolen);
		return NULL;
	}

	/* Some objects just need physical mem from stolen space */
	if (gtt_offset == I915_GTT_OFFSET_NONE)
		return obj;

	ret = i915_gem_object_pin_pages(obj);
	if (ret)
		goto err;

	vma = i915_vma_instance(obj, &ggtt->base, NULL);
	if (IS_ERR(vma)) {
		ret = PTR_ERR(vma);
		goto err_pages;
	}

	/* To simplify the initialisation sequence between KMS and GTT,
         * we allow construction of the stolen object prior to
         * setting up the GTT space. The actual reservation will occur
         * later.
         */
	ret = i915_gem_gtt_reserve(&ggtt->base, &vma->node,
				   size, gtt_offset, obj->cache_level,
				   0);
	if (ret) {
		DRM_DEBUG_KMS("failed to allocate stolen GTT space\n");
		goto err_pages;
	}

	GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));

	vma->pages = obj->mm.pages;
	vma->flags |= I915_VMA_GLOBAL_BIND;
	__i915_vma_set_map_and_fenceable(vma);
	list_move_tail(&vma->vm_link, &ggtt->base.inactive_list);

	spin_lock(&dev_priv->mm.obj_lock);
	list_move_tail(&obj->mm.link, &dev_priv->mm.bound_list);
	obj->bind_count++;
	spin_unlock(&dev_priv->mm.obj_lock);

	return obj;

err_pages:
	i915_gem_object_unpin_pages(obj);
err:
	i915_gem_object_put(obj);
	return NULL;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Chris Wilson
268
59.03%
16
43.24%
Ben Widawsky
93
20.48%
6
16.22%
Paulo Zanoni
23
5.07%
2
5.41%
Daniel Vetter
19
4.19%
4
10.81%
Tvrtko A. Ursulin
15
3.30%
3
8.11%
Jesse Barnes
9
1.98%
1
2.70%
Joonas Lahtinen
8
1.76%
2
5.41%
Matthew Auld
7
1.54%
1
2.70%
Dan Carpenter
7
1.54%
1
2.70%
David Herrmann
5
1.10%
1
2.70%
Total
454
100.00%
37
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Chris Wilson
865
32.49%
36
36.36%
Paulo Zanoni
703
26.41%
6
6.06%
Ville Syrjälä
422
15.85%
7
7.07%
Matthew Auld
291
10.93%
8
8.08%
Ben Widawsky
94
3.53%
7
7.07%
Daniel Vetter
94
3.53%
10
10.10%
Tvrtko A. Ursulin
48
1.80%
9
9.09%
David Herrmann
41
1.54%
2
2.02%
Joonas Lahtinen
37
1.39%
2
2.02%
Akash Goel
24
0.90%
2
2.02%
Jesse Barnes
14
0.53%
2
2.02%
Imre Deak
8
0.30%
2
2.02%
Dan Carpenter
7
0.26%
1
1.01%
Rodrigo Vivi
6
0.23%
3
3.03%
Jani Nikula
6
0.23%
1
1.01%
David Howells
2
0.08%
1
1.01%
Total
2662
100.00%
99
100.00%
Directory: drivers/gpu/drm/i915

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