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Commit dc8fb227 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

iommu/shmobile: Make use of domain_alloc and domain_free 



Implement domain_alloc and domain_free iommu-ops as a
replacement for domain_init/domain_destroy.

Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 3e116c3c

drivers/iommu/shmobile-iommu.c

+23 −16
Original line number Diff line number Diff line
@@ -42,11 +42,17 @@ struct shmobile_iommu_domain { 
	spinlock_t map_lock;

	spinlock_t attached_list_lock;

	struct list_head attached_list;

	struct iommu_domain domain;

};



static struct shmobile_iommu_archdata *ipmmu_archdata;

static struct kmem_cache *l1cache, *l2cache;



static struct shmobile_iommu_domain *to_sh_domain(struct iommu_domain *dom)

{

	return container_of(dom, struct shmobile_iommu_domain, domain);

}



static int pgtable_alloc(struct shmobile_iommu_domain_pgtable *pgtable,

			 struct kmem_cache *cache, size_t size)

{
@@ -82,31 +88,33 @@ static void pgtable_write(struct shmobile_iommu_domain_pgtable *pgtable, 
				   sizeof(val) * count, DMA_TO_DEVICE);

}



static int shmobile_iommu_domain_init(struct iommu_domain *domain)

static struct iommu_domain *shmobile_iommu_domain_alloc(unsigned type)

{

	struct shmobile_iommu_domain *sh_domain;

	int i, ret;



	sh_domain = kmalloc(sizeof(*sh_domain), GFP_KERNEL);

	if (type != IOMMU_DOMAIN_UNMANAGED)

		return NULL;



	sh_domain = kzalloc(sizeof(*sh_domain), GFP_KERNEL);

	if (!sh_domain)

		return -ENOMEM;

		return NULL;

	ret = pgtable_alloc(&sh_domain->l1, l1cache, L1_SIZE);

	if (ret < 0) {

		kfree(sh_domain);

		return ret;

		return NULL;

	}

	for (i = 0; i < L1_LEN; i++)

		sh_domain->l2[i].pgtable = NULL;

	spin_lock_init(&sh_domain->map_lock);

	spin_lock_init(&sh_domain->attached_list_lock);

	INIT_LIST_HEAD(&sh_domain->attached_list);

	domain->priv = sh_domain;

	return 0;

	return &sh_domain->domain;

}



static void shmobile_iommu_domain_destroy(struct iommu_domain *domain)

static void shmobile_iommu_domain_free(struct iommu_domain *domain)

{

	struct shmobile_iommu_domain *sh_domain = domain->priv;

	struct shmobile_iommu_domain *sh_domain = to_sh_domain(domain);

	int i;



	for (i = 0; i < L1_LEN; i++) {
@@ -115,14 +123,13 @@ static void shmobile_iommu_domain_destroy(struct iommu_domain *domain) 
	}

	pgtable_free(&sh_domain->l1, l1cache, L1_SIZE);

	kfree(sh_domain);

	domain->priv = NULL;

}



static int shmobile_iommu_attach_device(struct iommu_domain *domain,

					struct device *dev)

{

	struct shmobile_iommu_archdata *archdata = dev->archdata.iommu;

	struct shmobile_iommu_domain *sh_domain = domain->priv;

	struct shmobile_iommu_domain *sh_domain = to_sh_domain(domain);

	int ret = -EBUSY;



	if (!archdata)
@@ -151,7 +158,7 @@ static void shmobile_iommu_detach_device(struct iommu_domain *domain, 
					 struct device *dev)

{

	struct shmobile_iommu_archdata *archdata = dev->archdata.iommu;

	struct shmobile_iommu_domain *sh_domain = domain->priv;

	struct shmobile_iommu_domain *sh_domain = to_sh_domain(domain);



	if (!archdata)

		return;
@@ -214,7 +221,7 @@ static int shmobile_iommu_map(struct iommu_domain *domain, unsigned long iova, 
			      phys_addr_t paddr, size_t size, int prot)

{

	struct shmobile_iommu_domain_pgtable l2 = { .pgtable = NULL };

	struct shmobile_iommu_domain *sh_domain = domain->priv;

	struct shmobile_iommu_domain *sh_domain = to_sh_domain(domain);

	unsigned int l1index, l2index;

	int ret;
@@ -258,7 +265,7 @@ static size_t shmobile_iommu_unmap(struct iommu_domain *domain, 
				   unsigned long iova, size_t size)

{

	struct shmobile_iommu_domain_pgtable l2 = { .pgtable = NULL };

	struct shmobile_iommu_domain *sh_domain = domain->priv;

	struct shmobile_iommu_domain *sh_domain = to_sh_domain(domain);

	unsigned int l1index, l2index;

	uint32_t l2entry = 0;

	size_t ret = 0;
@@ -298,7 +305,7 @@ static size_t shmobile_iommu_unmap(struct iommu_domain *domain, 
static phys_addr_t shmobile_iommu_iova_to_phys(struct iommu_domain *domain,

					       dma_addr_t iova)

{

	struct shmobile_iommu_domain *sh_domain = domain->priv;

	struct shmobile_iommu_domain *sh_domain = to_sh_domain(domain);

	uint32_t l1entry = 0, l2entry = 0;

	unsigned int l1index, l2index;
@@ -355,8 +362,8 @@ static int shmobile_iommu_add_device(struct device *dev) 
}



static const struct iommu_ops shmobile_iommu_ops = {

	.domain_init = shmobile_iommu_domain_init,

	.domain_destroy = shmobile_iommu_domain_destroy,

	.domain_alloc = shmobile_iommu_domain_alloc,

	.domain_free = shmobile_iommu_domain_free,

	.attach_dev = shmobile_iommu_attach_device,

	.detach_dev = shmobile_iommu_detach_device,

	.map = shmobile_iommu_map,