[PATCH 04/15] iommu/vt-d: Make use of domain_alloc and domain_free

Joerg Roedel
2015-01-26T23:56:31Z

Get rid of domain_init and domain_destroy and implement
domain_alloc/domain_free instead.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
drivers/iommu/intel-iommu.c | 48 ++++++++++++++++++++++++++-------------------
1 file changed, 28 insertions(+), 20 deletions(-)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 40dfbc0..f3e979f 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -336,7 +336,7 @@ struct dmar_domain {
DECLARE_BITMAP(iommu_bmp, DMAR_UNITS_SUPPORTED);
/* bitmap of iommus this domain uses*/

- struct list_head devices; /* all devices' list */
+ struct list_head devices; /* all devices' list */
struct iova_domain iovad; /* iova's that belong to this domain */

struct dma_pte *pgd; /* virtual address */
@@ -355,6 +355,9 @@ struct dmar_domain {
2 == 1GiB, 3 == 512GiB, 4 == 1TiB */
spinlock_t iommu_lock; /* protect iommu set in domain */
u64 max_addr; /* maximum mapped address */
+
+ struct iommu_domain domain; /* generic domain data structure for
+ iommu core */
};

/* PCI domain-device relationship */
@@ -446,6 +449,12 @@ static LIST_HEAD(device_domain_list);

static const struct iommu_ops intel_iommu_ops;

+/* Convert generic 'struct iommu_domain to private struct dmar_domain */
+static struct dmar_domain *to_dmar_domain(struct iommu_domain *dom)
+{
+ return container_of(dom, struct dmar_domain, domain);
+}
+
static int __init intel_iommu_setup(char *str)
{
if (!str)
@@ -4363,44 +4372,45 @@ static int md_domain_init(struct dmar_domain *domain, int guest_width)
return 0;
}

-static int intel_iommu_domain_init(struct iommu_domain *domain)
+static struct iommu_domain *intel_iommu_domain_alloc(enum iommu_domain_type type)
{
struct dmar_domain *dmar_domain;
+ struct iommu_domain *domain;
+
+ if (type != IOMMU_DOMAIN_UNMANAGED)
+ return NULL;

dmar_domain = alloc_domain(DOMAIN_FLAG_VIRTUAL_MACHINE);
if (!dmar_domain) {
printk(KERN_ERR
"intel_iommu_domain_init: dmar_domain == NULL\n");
- return -ENOMEM;
+ return NULL;
}
if (md_domain_init(dmar_domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) {
printk(KERN_ERR
"intel_iommu_domain_init() failed\n");
domain_exit(dmar_domain);
- return -ENOMEM;
+ return NULL;
}
domain_update_iommu_cap(dmar_domain);
- domain->priv = dmar_domain;

+ domain = &dmar_domain->domain;
domain->geometry.aperture_start = 0;
domain->geometry.aperture_end = __DOMAIN_MAX_ADDR(dmar_domain->gaw);
domain->geometry.force_aperture = true;

- return 0;
+ return domain;
}

-static void intel_iommu_domain_destroy(struct iommu_domain *domain)
+static void intel_iommu_domain_free(struct iommu_domain *domain)
{
- struct dmar_domain *dmar_domain = domain->priv;
-
- domain->priv = NULL;
- domain_exit(dmar_domain);
+ domain_exit(to_dmar_domain(domain));
}

static int intel_iommu_attach_device(struct iommu_domain *domain,
struct device *dev)
{
- struct dmar_domain *dmar_domain = domain->priv;
+ struct dmar_domain *dmar_domain = to_dmar_domain(domain);
struct intel_iommu *iommu;
int addr_width;
u8 bus, devfn;
@@ -4465,16 +4475,14 @@ static int intel_iommu_attach_device(struct iommu_domain *domain,
static void intel_iommu_detach_device(struct iommu_domain *domain,
struct device *dev)
{
- struct dmar_domain *dmar_domain = domain->priv;
-
- domain_remove_one_dev_info(dmar_domain, dev);
+ domain_remove_one_dev_info(to_dmar_domain(domain), dev);
}

static int intel_iommu_map(struct iommu_domain *domain,
unsigned long iova, phys_addr_t hpa,
size_t size, int iommu_prot)
{
- struct dmar_domain *dmar_domain = domain->priv;
+ struct dmar_domain *dmar_domain = to_dmar_domain(domain);
u64 max_addr;
int prot = 0;
int ret;
@@ -4511,7 +4519,7 @@ static int intel_iommu_map(struct iommu_domain *domain,
static size_t intel_iommu_unmap(struct iommu_domain *domain,
unsigned long iova, size_t size)
{
- struct dmar_domain *dmar_domain = domain->priv;
+ struct dmar_domain *dmar_domain = to_dmar_domain(domain);
struct page *freelist = NULL;
struct intel_iommu *iommu;
unsigned long start_pfn, last_pfn;
@@ -4559,7 +4567,7 @@ static size_t intel_iommu_unmap(struct iommu_domain *domain,
static phys_addr_t intel_iommu_iova_to_phys(struct iommu_domain *domain,
dma_addr_t iova)
{
- struct dmar_domain *dmar_domain = domain->priv;
+ struct dmar_domain *dmar_domain = to_dmar_domain(domain);
struct dma_pte *pte;
int level = 0;
u64 phys = 0;
@@ -4618,8 +4626,8 @@ static void intel_iommu_remove_device(struct device *dev)

static const struct iommu_ops intel_iommu_ops = {
.capable = intel_iommu_capable,
- .domain_init = intel_iommu_domain_init,
- .domain_destroy = intel_iommu_domain_destroy,
+ .domain_alloc = intel_iommu_domain_alloc,
+ .domain_free = intel_iommu_domain_free,
.attach_dev = intel_iommu_attach_device,
.detach_dev = intel_iommu_detach_device,
.map = intel_iommu_map,
--
1.8.4.5