[PATCH 03/15] iommu/amd: Make use of domain_alloc and domain_free

Joerg Roedel
2015-01-26T23:52:04Z

Implement the new iommu-ops function pointers and remove the
obsolete domain_init and domain_destroy functions.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
drivers/iommu/amd_iommu.c | 84 ++++++++++++++++++++++-------------------
drivers/iommu/amd_iommu_types.h | 7 ++--
2 files changed, 48 insertions(+), 43 deletions(-)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 9802485..dfcddf5 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -126,6 +126,11 @@ static int __init alloc_passthrough_domain(void);
*
****************************************************************************/

+static struct protection_domain *to_pdomain(struct iommu_domain *dom)
+{
+ return container_of(dom, struct protection_domain, domain);
+}
+
static struct iommu_dev_data *alloc_dev_data(u16 devid)
{
struct iommu_dev_data *dev_data;
@@ -3236,42 +3241,45 @@ static int __init alloc_passthrough_domain(void)

return 0;
}
-static int amd_iommu_domain_init(struct iommu_domain *dom)
+
+static struct iommu_domain *amd_iommu_domain_alloc(enum iommu_domain_type type)
{
- struct protection_domain *domain;
+ struct protection_domain *pdomain;

- domain = protection_domain_alloc();
- if (!domain)
- goto out_free;
+ /* We only support unmanaged domains for now */
+ if (type != IOMMU_DOMAIN_UNMANAGED)
+ return NULL;

- domain->mode = PAGE_MODE_3_LEVEL;
- domain->pt_root = (void *)get_zeroed_page(GFP_KERNEL);
- if (!domain->pt_root)
+ pdomain = protection_domain_alloc();
+ if (!pdomain)
goto out_free;

- domain->iommu_domain = dom;
-
- dom->priv = domain;
+ pdomain->mode = PAGE_MODE_3_LEVEL;
+ pdomain->pt_root = (void *)get_zeroed_page(GFP_KERNEL);
+ if (!pdomain->pt_root)
+ goto out_free;

- dom->geometry.aperture_start = 0;
- dom->geometry.aperture_end = ~0ULL;
- dom->geometry.force_aperture = true;
+ pdomain->domain.geometry.aperture_start = 0;
+ pdomain->domain.geometry.aperture_end = ~0ULL;
+ pdomain->domain.geometry.force_aperture = true;

- return 0;
+ return &pdomain->domain;

out_free:
- protection_domain_free(domain);
+ protection_domain_free(pdomain);

- return -ENOMEM;
+ return NULL;
}

-static void amd_iommu_domain_destroy(struct iommu_domain *dom)
+static void amd_iommu_domain_free(struct iommu_domain *dom)
{
- struct protection_domain *domain = dom->priv;
+ struct protection_domain *domain;

- if (!domain)
+ if (!dom)
return;

+ domain = to_pdomain(dom);
+
if (domain->dev_cnt > 0)
cleanup_domain(domain);

@@ -3284,8 +3292,6 @@ static void amd_iommu_domain_destroy(struct iommu_domain *dom)
free_gcr3_table(domain);

protection_domain_free(domain);
-
- dom->priv = NULL;
}

static void amd_iommu_detach_device(struct iommu_domain *dom,
@@ -3313,7 +3319,7 @@ static void amd_iommu_detach_device(struct iommu_domain *dom,
static int amd_iommu_attach_device(struct iommu_domain *dom,
struct device *dev)
{
- struct protection_domain *domain = dom->priv;
+ struct protection_domain *domain = to_pdomain(dom);
struct iommu_dev_data *dev_data;
struct amd_iommu *iommu;
int ret;
@@ -3340,7 +3346,7 @@ static int amd_iommu_attach_device(struct iommu_domain *dom,
static int amd_iommu_map(struct iommu_domain *dom, unsigned long iova,
phys_addr_t paddr, size_t page_size, int iommu_prot)
{
- struct protection_domain *domain = dom->priv;
+ struct protection_domain *domain = to_pdomain(dom);
int prot = 0;
int ret;

@@ -3362,7 +3368,7 @@ static int amd_iommu_map(struct iommu_domain *dom, unsigned long iova,
static size_t amd_iommu_unmap(struct iommu_domain *dom, unsigned long iova,
size_t page_size)
{
- struct protection_domain *domain = dom->priv;
+ struct protection_domain *domain = to_pdomain(dom);
size_t unmap_size;

if (domain->mode == PAGE_MODE_NONE)
@@ -3380,7 +3386,7 @@ static size_t amd_iommu_unmap(struct iommu_domain *dom, unsigned long iova,
static phys_addr_t amd_iommu_iova_to_phys(struct iommu_domain *dom,
dma_addr_t iova)
{
- struct protection_domain *domain = dom->priv;
+ struct protection_domain *domain = to_pdomain(dom);
unsigned long offset_mask;
phys_addr_t paddr;
u64 *pte, __pte;
@@ -3420,8 +3426,8 @@ static bool amd_iommu_capable(enum iommu_cap cap)

static const struct iommu_ops amd_iommu_ops = {
.capable = amd_iommu_capable,
- .domain_init = amd_iommu_domain_init,
- .domain_destroy = amd_iommu_domain_destroy,
+ .domain_alloc = amd_iommu_domain_alloc,
+ .domain_free = amd_iommu_domain_free,
.attach_dev = amd_iommu_attach_device,
.detach_dev = amd_iommu_detach_device,
.map = amd_iommu_map,
@@ -3483,7 +3489,7 @@ EXPORT_SYMBOL(amd_iommu_unregister_ppr_notifier);

void amd_iommu_domain_direct_map(struct iommu_domain *dom)
{
- struct protection_domain *domain = dom->priv;
+ struct protection_domain *domain = to_pdomain(dom);
unsigned long flags;

spin_lock_irqsave(&domain->lock, flags);
@@ -3504,7 +3510,7 @@ EXPORT_SYMBOL(amd_iommu_domain_direct_map);

int amd_iommu_domain_enable_v2(struct iommu_domain *dom, int pasids)
{
- struct protection_domain *domain = dom->priv;
+ struct protection_domain *domain = to_pdomain(dom);
unsigned long flags;
int levels, ret;

@@ -3616,7 +3622,7 @@ static int __amd_iommu_flush_page(struct protection_domain *domain, int pasid,
int amd_iommu_flush_page(struct iommu_domain *dom, int pasid,
u64 address)
{
- struct protection_domain *domain = dom->priv;
+ struct protection_domain *domain = to_pdomain(dom);
unsigned long flags;
int ret;

@@ -3638,7 +3644,7 @@ static int __amd_iommu_flush_tlb(struct protection_domain *domain, int pasid)

int amd_iommu_flush_tlb(struct iommu_domain *dom, int pasid)
{
- struct protection_domain *domain = dom->priv;
+ struct protection_domain *domain = to_pdomain(dom);
unsigned long flags;
int ret;

@@ -3718,7 +3724,7 @@ static int __clear_gcr3(struct protection_domain *domain, int pasid)
int amd_iommu_domain_set_gcr3(struct iommu_domain *dom, int pasid,
unsigned long cr3)
{
- struct protection_domain *domain = dom->priv;
+ struct protection_domain *domain = to_pdomain(dom);
unsigned long flags;
int ret;

@@ -3732,7 +3738,7 @@ EXPORT_SYMBOL(amd_iommu_domain_set_gcr3);

int amd_iommu_domain_clear_gcr3(struct iommu_domain *dom, int pasid)
{
- struct protection_domain *domain = dom->priv;
+ struct protection_domain *domain = to_pdomain(dom);
unsigned long flags;
int ret;

@@ -3765,17 +3771,17 @@ EXPORT_SYMBOL(amd_iommu_complete_ppr);

struct iommu_domain *amd_iommu_get_v2_domain(struct pci_dev *pdev)
{
- struct protection_domain *domain;
+ struct protection_domain *pdomain;

- domain = get_domain(&pdev->dev);
- if (IS_ERR(domain))
+ pdomain = get_domain(&pdev->dev);
+ if (IS_ERR(pdomain))
return NULL;

/* Only return IOMMUv2 domains */
- if (!(domain->flags & PD_IOMMUV2_MASK))
+ if (!(pdomain->flags & PD_IOMMUV2_MASK))
return NULL;

- return domain->iommu_domain;
+ return &pdomain->domain;
}
EXPORT_SYMBOL(amd_iommu_get_v2_domain);

diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h
index cec51a8..b029654 100644
--- a/drivers/iommu/amd_iommu_types.h
+++ b/drivers/iommu/amd_iommu_types.h
@@ -400,6 +400,8 @@ struct iommu_domain;
struct protection_domain {
struct list_head list; /* for list of all protection domains */
struct list_head dev_list; /* List of all devices in this domain */
+ struct iommu_domain domain; /* generic domain handle used by
+ iommu core code */
spinlock_t lock; /* mostly used to lock the page table*/
struct mutex api_lock; /* protect page tables in the iommu-api path */
u16 id; /* the domain id written to the device table */
@@ -411,10 +413,7 @@ struct protection_domain {
bool updated; /* complete domain flush required */
unsigned dev_cnt; /* devices assigned to this domain */
unsigned dev_iommu[MAX_IOMMUS]; /* per-IOMMU reference count */
- void *priv; /* private data */
- struct iommu_domain *iommu_domain; /* Pointer to generic
- domain structure */
-
+ void *priv; /* private data */
};

/*
--
1.8.4.5