[PATCH 12/15] iommu/ipmmu-vmsa: Make use of domain_alloc and domain_free

Joerg Roedel
2015-01-26T23:52:50Z

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/ipmmu-vmsa.c | 43 ++++++++++++++++++++++++-------------------
1 file changed, 24 insertions(+), 19 deletions(-)

diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
index 7486931..12270e1 100644
--- a/drivers/iommu/ipmmu-vmsa.c
+++ b/drivers/iommu/ipmmu-vmsa.c
@@ -37,7 +37,7 @@ struct ipmmu_vmsa_device {

struct ipmmu_vmsa_domain {
struct ipmmu_vmsa_device *mmu;
- struct iommu_domain *io_domain;
+ struct iommu_domain io_domain;

unsigned int context_id;
spinlock_t lock; /* Protects mappings */
@@ -52,6 +52,11 @@ struct ipmmu_vmsa_archdata {
static DEFINE_SPINLOCK(ipmmu_devices_lock);
static LIST_HEAD(ipmmu_devices);

+static struct ipmmu_vmsa_domain *to_vmsa_domain(struct iommu_domain *dom)
+{
+ return container_of(dom, struct ipmmu_vmsa_domain, io_domain);
+}
+
#define TLB_LOOP_TIMEOUT 100 /* 100us */

/* -----------------------------------------------------------------------------
@@ -435,7 +440,7 @@ static irqreturn_t ipmmu_domain_irq(struct ipmmu_vmsa_domain *domain)
* TODO: We need to look up the faulty device based on the I/O VA. Use
* the IOMMU device for now.
*/
- if (!report_iommu_fault(domain->io_domain, mmu->dev, iova, 0))
+ if (!report_iommu_fault(&domain->io_domain, mmu->dev, iova, 0))
return IRQ_HANDLED;

dev_err_ratelimited(mmu->dev,
@@ -455,7 +460,7 @@ static irqreturn_t ipmmu_irq(int irq, void *dev)
return IRQ_NONE;

io_domain = mmu->mapping->domain;
- domain = io_domain->priv;
+ domain = to_vmsa_domain(io_domain);

return ipmmu_domain_irq(domain);
}
@@ -854,31 +859,31 @@ done:
* IOMMU Operations
*/

-static int ipmmu_domain_init(struct iommu_domain *io_domain)
+static struct iommu_domain *ipmmu_domain_alloc(enum iommu_domain_type type)
{
struct ipmmu_vmsa_domain *domain;

+ if (type != IOMMU_DOMAIN_UNMANAGED)
+ return NULL;
+
domain = kzalloc(sizeof(*domain), GFP_KERNEL);
if (!domain)
- return -ENOMEM;
+ return NULL;

spin_lock_init(&domain->lock);

domain->pgd = kzalloc(IPMMU_PTRS_PER_PGD * sizeof(pgd_t), GFP_KERNEL);
if (!domain->pgd) {
kfree(domain);
- return -ENOMEM;
+ return NULL;
}

- io_domain->priv = domain;
- domain->io_domain = io_domain;
-
- return 0;
+ return &domain->io_domain;
}

-static void ipmmu_domain_destroy(struct iommu_domain *io_domain)
+static void ipmmu_domain_free(struct iommu_domain *io_domain)
{
- struct ipmmu_vmsa_domain *domain = io_domain->priv;
+ struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);

/*
* Free the domain resources. We assume that all devices have already
@@ -894,7 +899,7 @@ static int ipmmu_attach_device(struct iommu_domain *io_domain,
{
struct ipmmu_vmsa_archdata *archdata = dev->archdata.iommu;
struct ipmmu_vmsa_device *mmu = archdata->mmu;
- struct ipmmu_vmsa_domain *domain = io_domain->priv;
+ struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);
unsigned long flags;
int ret = 0;

@@ -933,7 +938,7 @@ static void ipmmu_detach_device(struct iommu_domain *io_domain,
struct device *dev)
{
struct ipmmu_vmsa_archdata *archdata = dev->archdata.iommu;
- struct ipmmu_vmsa_domain *domain = io_domain->priv;
+ struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);

ipmmu_utlb_disable(domain, archdata->utlb);

@@ -945,7 +950,7 @@ static void ipmmu_detach_device(struct iommu_domain *io_domain,
static int ipmmu_map(struct iommu_domain *io_domain, unsigned long iova,
phys_addr_t paddr, size_t size, int prot)
{
- struct ipmmu_vmsa_domain *domain = io_domain->priv;
+ struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);

if (!domain)
return -ENODEV;
@@ -956,7 +961,7 @@ static int ipmmu_map(struct iommu_domain *io_domain, unsigned long iova,
static size_t ipmmu_unmap(struct iommu_domain *io_domain, unsigned long iova,
size_t size)
{
- struct ipmmu_vmsa_domain *domain = io_domain->priv;
+ struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);
int ret;

ret = ipmmu_clear_mapping(domain, iova, size);
@@ -966,7 +971,7 @@ static size_t ipmmu_unmap(struct iommu_domain *io_domain, unsigned long iova,
static phys_addr_t ipmmu_iova_to_phys(struct iommu_domain *io_domain,
dma_addr_t iova)
{
- struct ipmmu_vmsa_domain *domain = io_domain->priv;
+ struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);
pgd_t pgd;
pud_t pud;
pmd_t pmd;
@@ -1121,8 +1126,8 @@ static void ipmmu_remove_device(struct device *dev)
}

static const struct iommu_ops ipmmu_ops = {
- .domain_init = ipmmu_domain_init,
- .domain_destroy = ipmmu_domain_destroy,
+ .domain_alloc = ipmmu_domain_alloc,
+ .domain_free = ipmmu_domain_free,
.attach_dev = ipmmu_attach_device,
.detach_dev = ipmmu_detach_device,
.map = ipmmu_map,
--
1.8.4.5