[PATCH 06/15] iommu/arm-smmu: Make use of domain_alloc and domain_free

Joerg Roedel
2015-01-26T23:56:28Z

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

Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
drivers/iommu/arm-smmu.c | 46 +++++++++++++++++++++++++++-------------------
1 file changed, 27 insertions(+), 19 deletions(-)

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 6cd47b7..dd62669 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -415,6 +415,7 @@ struct arm_smmu_domain {
struct arm_smmu_cfg cfg;
enum arm_smmu_domain_stage stage;
spinlock_t lock;
+ struct iommu_domain domain;
};

static DEFINE_SPINLOCK(arm_smmu_devices_lock);
@@ -430,6 +431,11 @@ static struct arm_smmu_option_prop arm_smmu_options[] = {
{ 0, NULL},
};

+static struct arm_smmu_domain *to_smmu_domain(struct iommu_domain *dom)
+{
+ return container_of(dom, struct arm_smmu_domain, domain);
+}
+
static void parse_driver_options(struct arm_smmu_device *smmu)
{
int i = 0;
@@ -641,7 +647,7 @@ static irqreturn_t arm_smmu_context_fault(int irq, void *dev)
u32 fsr, far, fsynr, resume;
unsigned long iova;
struct iommu_domain *domain = dev;
- struct arm_smmu_domain *smmu_domain = domain->priv;
+ struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
struct arm_smmu_device *smmu = smmu_domain->smmu;
void __iomem *cb_base;
@@ -906,7 +912,7 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
{
int irq, start, ret = 0;
unsigned long flags;
- struct arm_smmu_domain *smmu_domain = domain->priv;
+ struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
struct arm_smmu_cfg *cfg = &smmu_domain->cfg;

spin_lock_irqsave(&smmu_domain->lock, flags);
@@ -990,7 +996,7 @@ out_unlock:

static void arm_smmu_destroy_domain_context(struct iommu_domain *domain)
{
- struct arm_smmu_domain *smmu_domain = domain->priv;
+ struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
struct arm_smmu_device *smmu = smmu_domain->smmu;
struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
void __iomem *cb_base;
@@ -1012,11 +1018,13 @@ static void arm_smmu_destroy_domain_context(struct iommu_domain *domain)
__arm_smmu_free_bitmap(smmu->context_map, cfg->cbndx);
}

-static int arm_smmu_domain_init(struct iommu_domain *domain)
+static struct iommu_domain *arm_smmu_domain_alloc(enum iommu_domain_type type)
{
struct arm_smmu_domain *smmu_domain;
pgd_t *pgd;

+ if (type != IOMMU_DOMAIN_UNMANAGED)
+ return NULL;
/*
* Allocate the domain and initialise some of its data structures.
* We can't really do anything meaningful until we've added a
@@ -1024,7 +1032,7 @@ static int arm_smmu_domain_init(struct iommu_domain *domain)
*/
smmu_domain = kzalloc(sizeof(*smmu_domain), GFP_KERNEL);
if (!smmu_domain)
- return -ENOMEM;
+ return NULL;

pgd = kcalloc(PTRS_PER_PGD, sizeof(pgd_t), GFP_KERNEL);
if (!pgd)
@@ -1032,12 +1040,12 @@ static int arm_smmu_domain_init(struct iommu_domain *domain)
smmu_domain->cfg.pgd = pgd;

spin_lock_init(&smmu_domain->lock);
- domain->priv = smmu_domain;
- return 0;
+
+ return &smmu_domain->domain;

out_free_domain:
kfree(smmu_domain);
- return -ENOMEM;
+ return NULL;
}

static void arm_smmu_free_ptes(pmd_t *pmd)
@@ -1103,9 +1111,9 @@ static void arm_smmu_free_pgtables(struct arm_smmu_domain *smmu_domain)
kfree(pgd_base);
}

-static void arm_smmu_domain_destroy(struct iommu_domain *domain)
+static void arm_smmu_domain_free(struct iommu_domain *domain)
{
- struct arm_smmu_domain *smmu_domain = domain->priv;
+ struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);

/*
* Free the domain resources. We assume that all devices have
@@ -1243,7 +1251,7 @@ static void arm_smmu_domain_remove_master(struct arm_smmu_domain *smmu_domain,
static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
{
int ret;
- struct arm_smmu_domain *smmu_domain = domain->priv;
+ struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
struct arm_smmu_device *smmu, *dom_smmu;
struct arm_smmu_master_cfg *cfg;

@@ -1292,7 +1300,7 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)

static void arm_smmu_detach_dev(struct iommu_domain *domain, struct device *dev)
{
- struct arm_smmu_domain *smmu_domain = domain->priv;
+ struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
struct arm_smmu_master_cfg *cfg;

cfg = find_smmu_master_cfg(dev);
@@ -1540,7 +1548,7 @@ out_unlock:
static int arm_smmu_map(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, size_t size, int prot)
{
- struct arm_smmu_domain *smmu_domain = domain->priv;
+ struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);

if (!smmu_domain)
return -ENODEV;
@@ -1552,7 +1560,7 @@ static size_t arm_smmu_unmap(struct iommu_domain *domain, unsigned long iova,
size_t size)
{
int ret;
- struct arm_smmu_domain *smmu_domain = domain->priv;
+ struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);

ret = arm_smmu_handle_mapping(smmu_domain, iova, 0, size, 0);
arm_smmu_tlb_inv_context(smmu_domain);
@@ -1566,7 +1574,7 @@ static phys_addr_t arm_smmu_iova_to_phys(struct iommu_domain *domain,
pud_t pud;
pmd_t pmd;
pte_t pte;
- struct arm_smmu_domain *smmu_domain = domain->priv;
+ struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
struct arm_smmu_cfg *cfg = &smmu_domain->cfg;

pgdp = cfg->pgd;
@@ -1684,7 +1692,7 @@ static void arm_smmu_remove_device(struct device *dev)
static int arm_smmu_domain_get_attr(struct iommu_domain *domain,
enum iommu_attr attr, void *data)
{
- struct arm_smmu_domain *smmu_domain = domain->priv;
+ struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);

switch (attr) {
case DOMAIN_ATTR_NESTING:
@@ -1698,7 +1706,7 @@ static int arm_smmu_domain_get_attr(struct iommu_domain *domain,
static int arm_smmu_domain_set_attr(struct iommu_domain *domain,
enum iommu_attr attr, void *data)
{
- struct arm_smmu_domain *smmu_domain = domain->priv;
+ struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);

switch (attr) {
case DOMAIN_ATTR_NESTING:
@@ -1717,8 +1725,8 @@ static int arm_smmu_domain_set_attr(struct iommu_domain *domain,

static const struct iommu_ops arm_smmu_ops = {
.capable = arm_smmu_capable,
- .domain_init = arm_smmu_domain_init,
- .domain_destroy = arm_smmu_domain_destroy,
+ .domain_alloc = arm_smmu_domain_alloc,
+ .domain_free = arm_smmu_domain_free,
.attach_dev = arm_smmu_attach_dev,
.detach_dev = arm_smmu_detach_dev,
.map = arm_smmu_map,
--
1.8.4.5