[GitHub/LineageOS/android_kernel_motorola_exynos9610.git] / drivers / gpu / drm / etnaviv / etnaviv_mmu.c

/*
 * Copyright (C) 2015 Etnaviv Project
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "common.xml.h"
#include "etnaviv_drv.h"
#include "etnaviv_gem.h"
#include "etnaviv_gpu.h"
#include "etnaviv_iommu.h"
#include "etnaviv_mmu.h"

static int etnaviv_fault_handler(struct iommu_domain *iommu, struct device *dev,
		unsigned long iova, int flags, void *arg)
{
	DBG("*** fault: iova=%08lx, flags=%d", iova, flags);
	return 0;
}

int etnaviv_iommu_map(struct etnaviv_iommu *iommu, u32 iova,
		struct sg_table *sgt, unsigned len, int prot)
{
	struct iommu_domain *domain = iommu->domain;
	struct scatterlist *sg;
	unsigned int da = iova;
	unsigned int i, j;
	int ret;

	if (!domain || !sgt)
		return -EINVAL;

	for_each_sg(sgt->sgl, sg, sgt->nents, i) {
		u32 pa = sg_dma_address(sg) - sg->offset;
		size_t bytes = sg_dma_len(sg) + sg->offset;

		VERB("map[%d]: %08x %08x(%zx)", i, iova, pa, bytes);

		ret = iommu_map(domain, da, pa, bytes, prot);
		if (ret)
			goto fail;

		da += bytes;
	}

	return 0;

fail:
	da = iova;

	for_each_sg(sgt->sgl, sg, i, j) {
		size_t bytes = sg_dma_len(sg) + sg->offset;

		iommu_unmap(domain, da, bytes);
		da += bytes;
	}
	return ret;
}

int etnaviv_iommu_unmap(struct etnaviv_iommu *iommu, u32 iova,
		struct sg_table *sgt, unsigned len)
{
	struct iommu_domain *domain = iommu->domain;
	struct scatterlist *sg;
	unsigned int da = iova;
	int i;

	for_each_sg(sgt->sgl, sg, sgt->nents, i) {
		size_t bytes = sg_dma_len(sg) + sg->offset;
		size_t unmapped;

		unmapped = iommu_unmap(domain, da, bytes);
		if (unmapped < bytes)
			return unmapped;

		VERB("unmap[%d]: %08x(%zx)", i, iova, bytes);

		BUG_ON(!PAGE_ALIGNED(bytes));

		da += bytes;
	}

	return 0;
}

static void etnaviv_iommu_remove_mapping(struct etnaviv_iommu *mmu,
	struct etnaviv_vram_mapping *mapping)
{
	struct etnaviv_gem_object *etnaviv_obj = mapping->object;

	etnaviv_iommu_unmap(mmu, mapping->vram_node.start,
			    etnaviv_obj->sgt, etnaviv_obj->base.size);
	drm_mm_remove_node(&mapping->vram_node);
}

static int etnaviv_iommu_find_iova(struct etnaviv_iommu *mmu,
				   struct drm_mm_node *node, size_t size)
{
	struct etnaviv_vram_mapping *free = NULL;
	int ret;

	lockdep_assert_held(&mmu->lock);

	while (1) {
		struct etnaviv_vram_mapping *m, *n;
		struct list_head list;
		bool found;

		/*
		 * XXX: The DRM_MM_SEARCH_BELOW is really a hack to trick
		 * drm_mm into giving out a low IOVA after address space
		 * rollover. This needs a proper fix.
		 */
		ret = drm_mm_insert_node_in_range(&mmu->mm, node,
			size, 0, mmu->last_iova, ~0UL,
			mmu->last_iova ? DRM_MM_SEARCH_DEFAULT : DRM_MM_SEARCH_BELOW);

		if (ret != -ENOSPC)
			break;

		/*
		 * If we did not search from the start of the MMU region,
		 * try again in case there are free slots.
		 */
		if (mmu->last_iova) {
			mmu->last_iova = 0;
			mmu->need_flush = true;
			continue;
		}

		/* Try to retire some entries */
		drm_mm_init_scan(&mmu->mm, size, 0, 0);

		found = 0;
		INIT_LIST_HEAD(&list);
		list_for_each_entry(free, &mmu->mappings, mmu_node) {
			/* If this vram node has not been used, skip this. */
			if (!free->vram_node.mm)
				continue;

			/*
			 * If the iova is pinned, then it's in-use,
			 * so we must keep its mapping.
			 */
			if (free->use)
				continue;

			list_add(&free->scan_node, &list);
			if (drm_mm_scan_add_block(&free->vram_node)) {
				found = true;
				break;
			}
		}

		if (!found) {
			/* Nothing found, clean up and fail */
			list_for_each_entry_safe(m, n, &list, scan_node)
				BUG_ON(drm_mm_scan_remove_block(&m->vram_node));
			break;
		}

		/*
		 * drm_mm does not allow any other operations while
		 * scanning, so we have to remove all blocks first.
		 * If drm_mm_scan_remove_block() returns false, we
		 * can leave the block pinned.
		 */
		list_for_each_entry_safe(m, n, &list, scan_node)
			if (!drm_mm_scan_remove_block(&m->vram_node))
				list_del_init(&m->scan_node);

		/*
		 * Unmap the blocks which need to be reaped from the MMU.
		 * Clear the mmu pointer to prevent the mapping_get finding
		 * this mapping.
		 */
		list_for_each_entry_safe(m, n, &list, scan_node) {
			etnaviv_iommu_remove_mapping(mmu, m);
			m->mmu = NULL;
			list_del_init(&m->mmu_node);
			list_del_init(&m->scan_node);
		}

		/*
		 * We removed enough mappings so that the new allocation will
		 * succeed.  Ensure that the MMU will be flushed before the
		 * associated commit requesting this mapping, and retry the
		 * allocation one more time.
		 */
		mmu->need_flush = true;
	}

	return ret;
}

int etnaviv_iommu_map_gem(struct etnaviv_iommu *mmu,
	struct etnaviv_gem_object *etnaviv_obj, u32 memory_base,
	struct etnaviv_vram_mapping *mapping)
{
	struct sg_table *sgt = etnaviv_obj->sgt;
	struct drm_mm_node *node;
	int ret;

	lockdep_assert_held(&etnaviv_obj->lock);

	mutex_lock(&mmu->lock);

	/* v1 MMU can optimize single entry (contiguous) scatterlists */
	if (mmu->version == ETNAVIV_IOMMU_V1 &&
	    sgt->nents == 1 && !(etnaviv_obj->flags & ETNA_BO_FORCE_MMU)) {
		u32 iova;

		iova = sg_dma_address(sgt->sgl) - memory_base;
		if (iova < 0x80000000 - sg_dma_len(sgt->sgl)) {
			mapping->iova = iova;
			list_add_tail(&mapping->mmu_node, &mmu->mappings);
			mutex_unlock(&mmu->lock);
			return 0;
		}
	}

	node = &mapping->vram_node;

	ret = etnaviv_iommu_find_iova(mmu, node, etnaviv_obj->base.size);
	if (ret < 0) {
		mutex_unlock(&mmu->lock);
		return ret;
	}

	mmu->last_iova = node->start + etnaviv_obj->base.size;
	mapping->iova = node->start;
	ret = etnaviv_iommu_map(mmu, node->start, sgt, etnaviv_obj->base.size,
				IOMMU_READ | IOMMU_WRITE);

	if (ret < 0) {
		drm_mm_remove_node(node);
		mutex_unlock(&mmu->lock);
		return ret;
	}

	list_add_tail(&mapping->mmu_node, &mmu->mappings);
	mutex_unlock(&mmu->lock);

	return ret;
}

void etnaviv_iommu_unmap_gem(struct etnaviv_iommu *mmu,
	struct etnaviv_vram_mapping *mapping)
{
	WARN_ON(mapping->use);

	mutex_lock(&mmu->lock);

	/* If the vram node is on the mm, unmap and remove the node */
	if (mapping->vram_node.mm == &mmu->mm)
		etnaviv_iommu_remove_mapping(mmu, mapping);

	list_del(&mapping->mmu_node);
	mutex_unlock(&mmu->lock);
}

void etnaviv_iommu_destroy(struct etnaviv_iommu *mmu)
{
	drm_mm_takedown(&mmu->mm);
	iommu_domain_free(mmu->domain);
	kfree(mmu);
}

struct etnaviv_iommu *etnaviv_iommu_new(struct etnaviv_gpu *gpu)
{
	enum etnaviv_iommu_version version;
	struct etnaviv_iommu *mmu;

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

	if (!(gpu->identity.minor_features1 & chipMinorFeatures1_MMU_VERSION)) {
		mmu->domain = etnaviv_iommuv1_domain_alloc(gpu);
		version = ETNAVIV_IOMMU_V1;
	} else {
		mmu->domain = etnaviv_iommuv2_domain_alloc(gpu);
		version = ETNAVIV_IOMMU_V2;
	}

	if (!mmu->domain) {
		dev_err(gpu->dev, "Failed to allocate GPU IOMMU domain\n");
		kfree(mmu);
		return ERR_PTR(-ENOMEM);
	}

	mmu->gpu = gpu;
	mmu->version = version;
	mutex_init(&mmu->lock);
	INIT_LIST_HEAD(&mmu->mappings);

	drm_mm_init(&mmu->mm, mmu->domain->geometry.aperture_start,
		    mmu->domain->geometry.aperture_end -
		    mmu->domain->geometry.aperture_start + 1);

	iommu_set_fault_handler(mmu->domain, etnaviv_fault_handler, gpu->dev);

	return mmu;
}

void etnaviv_iommu_restore(struct etnaviv_gpu *gpu)
{
	if (gpu->mmu->version == ETNAVIV_IOMMU_V1)
		etnaviv_iommuv1_restore(gpu);
	else
		etnaviv_iommuv2_restore(gpu);
}

u32 etnaviv_iommu_get_cmdbuf_va(struct etnaviv_gpu *gpu,
				struct etnaviv_cmdbuf *buf)
{
	struct etnaviv_iommu *mmu = gpu->mmu;

	if (mmu->version == ETNAVIV_IOMMU_V1) {
		return buf->paddr - gpu->memory_base;
	} else {
		int ret;

		if (buf->vram_node.allocated)
			return (u32)buf->vram_node.start;

		mutex_lock(&mmu->lock);
		ret = etnaviv_iommu_find_iova(mmu, &buf->vram_node,
					      buf->size + SZ_64K);
		if (ret < 0) {
			mutex_unlock(&mmu->lock);
			return 0;
		}
		ret = iommu_map(mmu->domain, buf->vram_node.start, buf->paddr,
				buf->size, IOMMU_READ);
		if (ret < 0) {
			drm_mm_remove_node(&buf->vram_node);
			mutex_unlock(&mmu->lock);
			return 0;
		}
		/*
		 * At least on GC3000 the FE MMU doesn't properly flush old TLB
		 * entries. Make sure to space the command buffers out in a way
		 * that the FE MMU prefetch won't load invalid entries.
		 */
		mmu->last_iova = buf->vram_node.start + buf->size + SZ_64K;
		gpu->mmu->need_flush = true;
		mutex_unlock(&mmu->lock);

		return (u32)buf->vram_node.start;
	}
}

void etnaviv_iommu_put_cmdbuf_va(struct etnaviv_gpu *gpu,
				 struct etnaviv_cmdbuf *buf)
{
	struct etnaviv_iommu *mmu = gpu->mmu;

	if (mmu->version == ETNAVIV_IOMMU_V2 && buf->vram_node.allocated) {
		mutex_lock(&mmu->lock);
		iommu_unmap(mmu->domain, buf->vram_node.start, buf->size);
		drm_mm_remove_node(&buf->vram_node);
		mutex_unlock(&mmu->lock);
	}
}
size_t etnaviv_iommu_dump_size(struct etnaviv_iommu *iommu)
{
	struct etnaviv_iommu_ops *ops;

	ops = container_of(iommu->domain->ops, struct etnaviv_iommu_ops, ops);

	return ops->dump_size(iommu->domain);
}

void etnaviv_iommu_dump(struct etnaviv_iommu *iommu, void *buf)
{
	struct etnaviv_iommu_ops *ops;

	ops = container_of(iommu->domain->ops, struct etnaviv_iommu_ops, ops);

	ops->dump(iommu->domain, buf);
}
Commit	Line	Data
a8c21a54 T	1	/*
	2	* Copyright (C) 2015 Etnaviv Project
	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms of the GNU General Public License version 2 as published by
	6	* the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful, but WITHOUT
	9	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	10	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	11	* more details.
	12	*
	13	* You should have received a copy of the GNU General Public License along with
	14	* this program. If not, see <http://www.gnu.org/licenses/>.
	15	*/
	16
dd34bb96	17	#include "common.xml.h"
a8c21a54 T	18	#include "etnaviv_drv.h"
	19	#include "etnaviv_gem.h"
	20	#include "etnaviv_gpu.h"
e095c8fe	21	#include "etnaviv_iommu.h"
a8c21a54 T	22	#include "etnaviv_mmu.h"
	23
	24	static int etnaviv_fault_handler(struct iommu_domain iommu, struct device dev,
	25	unsigned long iova, int flags, void *arg)
	26	{
	27	DBG("*** fault: iova=%08lx, flags=%d", iova, flags);
	28	return 0;
	29	}
	30
	31	int etnaviv_iommu_map(struct etnaviv_iommu *iommu, u32 iova,
	32	struct sg_table *sgt, unsigned len, int prot)
	33	{
	34	struct iommu_domain *domain = iommu->domain;
	35	struct scatterlist *sg;
	36	unsigned int da = iova;
	37	unsigned int i, j;
	38	int ret;
	39
	40	if (!domain \|\| !sgt)
	41	return -EINVAL;
	42
	43	for_each_sg(sgt->sgl, sg, sgt->nents, i) {
	44	u32 pa = sg_dma_address(sg) - sg->offset;
	45	size_t bytes = sg_dma_len(sg) + sg->offset;
	46
	47	VERB("map[%d]: %08x %08x(%zx)", i, iova, pa, bytes);
	48
	49	ret = iommu_map(domain, da, pa, bytes, prot);
	50	if (ret)
	51	goto fail;
	52
	53	da += bytes;
	54	}
	55
	56	return 0;
	57
	58	fail:
	59	da = iova;
	60
	61	for_each_sg(sgt->sgl, sg, i, j) {
	62	size_t bytes = sg_dma_len(sg) + sg->offset;
	63
	64	iommu_unmap(domain, da, bytes);
	65	da += bytes;
	66	}
	67	return ret;
	68	}
	69
	70	int etnaviv_iommu_unmap(struct etnaviv_iommu *iommu, u32 iova,
	71	struct sg_table *sgt, unsigned len)
	72	{
	73	struct iommu_domain *domain = iommu->domain;
	74	struct scatterlist *sg;
	75	unsigned int da = iova;
	76	int i;
	77
	78	for_each_sg(sgt->sgl, sg, sgt->nents, i) {
	79	size_t bytes = sg_dma_len(sg) + sg->offset;
	80	size_t unmapped;
	81
	82	unmapped = iommu_unmap(domain, da, bytes);
	83	if (unmapped < bytes)
	84	return unmapped;
	85
86	VERB("unmap[%d]: %08x(%zx)", i, iova, bytes);
87
88	BUG_ON(!PAGE_ALIGNED(bytes));
89
90	da += bytes;
91	}
92
93	return 0;
94	}
95
96	static void etnaviv_iommu_remove_mapping(struct etnaviv_iommu *mmu,
97	struct etnaviv_vram_mapping *mapping)
98	{
99	struct etnaviv_gem_object *etnaviv_obj = mapping->object;
100
101	etnaviv_iommu_unmap(mmu, mapping->vram_node.start,
102	etnaviv_obj->sgt, etnaviv_obj->base.size);
103	drm_mm_remove_node(&mapping->vram_node);
104	}
105
90969c9a LS	106	static int etnaviv_iommu_find_iova(struct etnaviv_iommu *mmu,
90969c9a LS	107	struct drm_mm_node *node, size_t size)
a8c21a54 T	108	{
a8c21a54 T	109	struct etnaviv_vram_mapping *free = NULL;
a8c21a54 T	110	int ret;
a8c21a54 T	111
90969c9a	112	lockdep_assert_held(&mmu->lock);
a8c21a54	113
a8c21a54 T	114	while (1) {
	115	struct etnaviv_vram_mapping m, n;
	116	struct list_head list;
	117	bool found;
	118
3546fb0c LS	119	/*
	120	* XXX: The DRM_MM_SEARCH_BELOW is really a hack to trick
	121	* drm_mm into giving out a low IOVA after address space
	122	* rollover. This needs a proper fix.
	123	*/
a8c21a54	124	ret = drm_mm_insert_node_in_range(&mmu->mm, node,
90969c9a	125	size, 0, mmu->last_iova, ~0UL,
3546fb0c	126	mmu->last_iova ? DRM_MM_SEARCH_DEFAULT : DRM_MM_SEARCH_BELOW);
a8c21a54 T	127
	128	if (ret != -ENOSPC)
	129	break;
	130
	131	/*
	132	* If we did not search from the start of the MMU region,
	133	* try again in case there are free slots.
	134	*/
	135	if (mmu->last_iova) {
	136	mmu->last_iova = 0;
	137	mmu->need_flush = true;
	138	continue;
	139	}
	140
	141	/* Try to retire some entries */
90969c9a	142	drm_mm_init_scan(&mmu->mm, size, 0, 0);
a8c21a54 T	143
	144	found = 0;
	145	INIT_LIST_HEAD(&list);
	146	list_for_each_entry(free, &mmu->mappings, mmu_node) {
	147	/* If this vram node has not been used, skip this. */
	148	if (!free->vram_node.mm)
	149	continue;
	150
	151	/*
	152	* If the iova is pinned, then it's in-use,
	153	* so we must keep its mapping.
	154	*/
	155	if (free->use)
	156	continue;
	157
	158	list_add(&free->scan_node, &list);
	159	if (drm_mm_scan_add_block(&free->vram_node)) {
	160	found = true;
	161	break;
	162	}
	163	}
	164
	165	if (!found) {
	166	/* Nothing found, clean up and fail */
	167	list_for_each_entry_safe(m, n, &list, scan_node)
	168	BUG_ON(drm_mm_scan_remove_block(&m->vram_node));
	169	break;
	170	}
	171
	172	/*
	173	* drm_mm does not allow any other operations while
	174	* scanning, so we have to remove all blocks first.
	175	* If drm_mm_scan_remove_block() returns false, we
	176	* can leave the block pinned.
	177	*/
	178	list_for_each_entry_safe(m, n, &list, scan_node)
	179	if (!drm_mm_scan_remove_block(&m->vram_node))
	180	list_del_init(&m->scan_node);
	181
	182	/*
	183	* Unmap the blocks which need to be reaped from the MMU.
b6325f40	184	* Clear the mmu pointer to prevent the mapping_get finding
a8c21a54 T	185	* this mapping.
	186	*/
	187	list_for_each_entry_safe(m, n, &list, scan_node) {
	188	etnaviv_iommu_remove_mapping(mmu, m);
	189	m->mmu = NULL;
	190	list_del_init(&m->mmu_node);
	191	list_del_init(&m->scan_node);
	192	}
	193
	194	/*
	195	* We removed enough mappings so that the new allocation will
	196	* succeed. Ensure that the MMU will be flushed before the
	197	* associated commit requesting this mapping, and retry the
	198	* allocation one more time.
	199	*/
	200	mmu->need_flush = true;
	201	}
	202
90969c9a LS	203	return ret;
	204	}
	205
	206	int etnaviv_iommu_map_gem(struct etnaviv_iommu *mmu,
	207	struct etnaviv_gem_object *etnaviv_obj, u32 memory_base,
	208	struct etnaviv_vram_mapping *mapping)
	209	{
	210	struct sg_table *sgt = etnaviv_obj->sgt;
	211	struct drm_mm_node *node;
	212	int ret;
	213
	214	lockdep_assert_held(&etnaviv_obj->lock);
	215
	216	mutex_lock(&mmu->lock);
	217
	218	/* v1 MMU can optimize single entry (contiguous) scatterlists */
	219	if (mmu->version == ETNAVIV_IOMMU_V1 &&
	220	sgt->nents == 1 && !(etnaviv_obj->flags & ETNA_BO_FORCE_MMU)) {
	221	u32 iova;
	222
	223	iova = sg_dma_address(sgt->sgl) - memory_base;
	224	if (iova < 0x80000000 - sg_dma_len(sgt->sgl)) {
	225	mapping->iova = iova;
	226	list_add_tail(&mapping->mmu_node, &mmu->mappings);
	227	mutex_unlock(&mmu->lock);
	228	return 0;
	229	}
	230	}
	231
	232	node = &mapping->vram_node;
	233
	234	ret = etnaviv_iommu_find_iova(mmu, node, etnaviv_obj->base.size);
a8c21a54 T	235	if (ret < 0) {
	236	mutex_unlock(&mmu->lock);
	237	return ret;
	238	}
	239
	240	mmu->last_iova = node->start + etnaviv_obj->base.size;
	241	mapping->iova = node->start;
	242	ret = etnaviv_iommu_map(mmu, node->start, sgt, etnaviv_obj->base.size,
	243	IOMMU_READ \| IOMMU_WRITE);
	244
	245	if (ret < 0) {
	246	drm_mm_remove_node(node);
	247	mutex_unlock(&mmu->lock);
	248	return ret;
	249	}
	250
	251	list_add_tail(&mapping->mmu_node, &mmu->mappings);
	252	mutex_unlock(&mmu->lock);
	253
	254	return ret;
	255	}
	256
	257	void etnaviv_iommu_unmap_gem(struct etnaviv_iommu *mmu,
	258	struct etnaviv_vram_mapping *mapping)
	259	{
	260	WARN_ON(mapping->use);
	261
	262	mutex_lock(&mmu->lock);
	263
	264	/* If the vram node is on the mm, unmap and remove the node */
	265	if (mapping->vram_node.mm == &mmu->mm)
	266	etnaviv_iommu_remove_mapping(mmu, mapping);
	267
	268	list_del(&mapping->mmu_node);
	269	mutex_unlock(&mmu->lock);
	270	}
	271
	272	void etnaviv_iommu_destroy(struct etnaviv_iommu *mmu)
	273	{
	274	drm_mm_takedown(&mmu->mm);
	275	iommu_domain_free(mmu->domain);
	276	kfree(mmu);
	277	}
	278
dd34bb96	279	struct etnaviv_iommu etnaviv_iommu_new(struct etnaviv_gpu gpu)
a8c21a54	280	{
dd34bb96	281	enum etnaviv_iommu_version version;
a8c21a54 T	282	struct etnaviv_iommu *mmu;
	283
	284	mmu = kzalloc(sizeof(*mmu), GFP_KERNEL);
	285	if (!mmu)
	286	return ERR_PTR(-ENOMEM);
	287
dd34bb96 LS	288	if (!(gpu->identity.minor_features1 & chipMinorFeatures1_MMU_VERSION)) {
	289	mmu->domain = etnaviv_iommuv1_domain_alloc(gpu);
	290	version = ETNAVIV_IOMMU_V1;
	291	} else {
	292	mmu->domain = etnaviv_iommuv2_domain_alloc(gpu);
	293	version = ETNAVIV_IOMMU_V2;
	294	}
	295
	296	if (!mmu->domain) {
	297	dev_err(gpu->dev, "Failed to allocate GPU IOMMU domain\n");
	298	kfree(mmu);
	299	return ERR_PTR(-ENOMEM);
	300	}
	301
a8c21a54 T	302	mmu->gpu = gpu;
	303	mmu->version = version;
	304	mutex_init(&mmu->lock);
	305	INIT_LIST_HEAD(&mmu->mappings);
	306
dd34bb96 LS	307	drm_mm_init(&mmu->mm, mmu->domain->geometry.aperture_start,
	308	mmu->domain->geometry.aperture_end -
	309	mmu->domain->geometry.aperture_start + 1);
a8c21a54	310
dd34bb96	311	iommu_set_fault_handler(mmu->domain, etnaviv_fault_handler, gpu->dev);
a8c21a54 T	312
	313	return mmu;
	314	}
	315
e095c8fe LS	316	void etnaviv_iommu_restore(struct etnaviv_gpu *gpu)
	317	{
	318	if (gpu->mmu->version == ETNAVIV_IOMMU_V1)
	319	etnaviv_iommuv1_restore(gpu);
	320	else
afb7b3b1	321	etnaviv_iommuv2_restore(gpu);
e095c8fe LS	322	}
e095c8fe LS	323
e07c0db5 LS	324	u32 etnaviv_iommu_get_cmdbuf_va(struct etnaviv_gpu *gpu,
	325	struct etnaviv_cmdbuf *buf)
	326	{
e68f270f LS	327	struct etnaviv_iommu *mmu = gpu->mmu;
	328
	329	if (mmu->version == ETNAVIV_IOMMU_V1) {
	330	return buf->paddr - gpu->memory_base;
	331	} else {
	332	int ret;
	333
	334	if (buf->vram_node.allocated)
	335	return (u32)buf->vram_node.start;
	336
	337	mutex_lock(&mmu->lock);
8814d2dc LS	338	ret = etnaviv_iommu_find_iova(mmu, &buf->vram_node,
8814d2dc LS	339	buf->size + SZ_64K);
e68f270f LS	340	if (ret < 0) {
	341	mutex_unlock(&mmu->lock);
	342	return 0;
	343	}
	344	ret = iommu_map(mmu->domain, buf->vram_node.start, buf->paddr,
	345	buf->size, IOMMU_READ);
	346	if (ret < 0) {
	347	drm_mm_remove_node(&buf->vram_node);
	348	mutex_unlock(&mmu->lock);
	349	return 0;
	350	}
7c971c62 LS	351	/*
	352	* At least on GC3000 the FE MMU doesn't properly flush old TLB
	353	* entries. Make sure to space the command buffers out in a way
	354	* that the FE MMU prefetch won't load invalid entries.
	355	*/
	356	mmu->last_iova = buf->vram_node.start + buf->size + SZ_64K;
e68f270f LS	357	gpu->mmu->need_flush = true;
	358	mutex_unlock(&mmu->lock);
	359
	360	return (u32)buf->vram_node.start;
	361	}
e07c0db5 LS	362	}
e07c0db5 LS	363
e68f270f LS	364	void etnaviv_iommu_put_cmdbuf_va(struct etnaviv_gpu *gpu,
	365	struct etnaviv_cmdbuf *buf)
	366	{
	367	struct etnaviv_iommu *mmu = gpu->mmu;
	368
	369	if (mmu->version == ETNAVIV_IOMMU_V2 && buf->vram_node.allocated) {
	370	mutex_lock(&mmu->lock);
	371	iommu_unmap(mmu->domain, buf->vram_node.start, buf->size);
	372	drm_mm_remove_node(&buf->vram_node);
	373	mutex_unlock(&mmu->lock);
	374	}
	375	}
a8c21a54 T	376	size_t etnaviv_iommu_dump_size(struct etnaviv_iommu *iommu)
	377	{
	378	struct etnaviv_iommu_ops *ops;
	379
	380	ops = container_of(iommu->domain->ops, struct etnaviv_iommu_ops, ops);
	381
	382	return ops->dump_size(iommu->domain);
	383	}
	384
	385	void etnaviv_iommu_dump(struct etnaviv_iommu iommu, void buf)
	386	{
	387	struct etnaviv_iommu_ops *ops;
	388
	389	ops = container_of(iommu->domain->ops, struct etnaviv_iommu_ops, ops);
	390
	391	ops->dump(iommu->domain, buf);
	392	}