FEX-Emu/linux
1
0
Fork 0
mirror of https://github.com/FEX-Emu/linux.git synced 2024-12-22 17:33:01 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

iommu/tegra-gart: Make use of domain_alloc and domain_free

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

Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2015-03-26 13:43:13 +01:00
parent d5f1a81ccb
commit b5cbb386ae
1 changed files with 46 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

67
drivers/iommu/tegra-gart.c
View File

@ -63,11 +63,21 @@ struct gart_device {
struct device *dev;
};
struct gart_domain {
struct iommu_domain domain; /* generic domain handle */
struct gart_device *gart; /* link to gart device */
};
static struct gart_device *gart_handle; /* unique for a system */
#define GART_PTE(_pfn) \
(GART_ENTRY_PHYS_ADDR_VALID | ((_pfn) << PAGE_SHIFT))
static struct gart_domain *to_gart_domain(struct iommu_domain *dom)
{
return container_of(dom, struct gart_domain, domain);
}
/*
* Any interaction between any block on PPSB and a block on APB or AHB
* must have these read-back to ensure the APB/AHB bus transaction is
@ -156,6 +166,7 @@ static inline bool gart_iova_range_valid(struct gart_device *gart,
static int gart_iommu_attach_dev(struct iommu_domain *domain,
struct device *dev)
{
struct gart_domain *gart_domain = to_gart_domain(domain);
struct gart_device *gart;
struct gart_client *client, *c;
int err = 0;
@ -163,7 +174,7 @@ static int gart_iommu_attach_dev(struct iommu_domain *domain,
gart = gart_handle;
if (!gart)
return -EINVAL;
domain->priv = gart;
gart_domain->gart = gart;
domain->geometry.aperture_start = gart->iovmm_base;
domain->geometry.aperture_end = gart->iovmm_base +
@ -198,7 +209,8 @@ fail:
static void gart_iommu_detach_dev(struct iommu_domain *domain,
struct device *dev)
{
struct gart_device *gart = domain->priv;
struct gart_domain *gart_domain = to_gart_domain(domain);
struct gart_device *gart = gart_domain->gart;
struct gart_client *c;
spin_lock(&gart->client_lock);
@ -216,33 +228,44 @@ out:
spin_unlock(&gart->client_lock);
}
static int gart_iommu_domain_init(struct iommu_domain *domain)
static struct iommu_domain *gart_iommu_domain_alloc(unsigned type)
{
return 0;
struct gart_domain *gart_domain;
if (type != IOMMU_DOMAIN_UNMANAGED)
return NULL;
gart_domain = kzalloc(sizeof(*gart_domain), GFP_KERNEL);
if (!gart_domain)
return NULL;
return &gart_domain->domain;
}
static void gart_iommu_domain_destroy(struct iommu_domain *domain)
static void gart_iommu_domain_free(struct iommu_domain *domain)
{
struct gart_device *gart = domain->priv;
struct gart_domain *gart_domain = to_gart_domain(domain);
struct gart_device *gart = gart_domain->gart;
if (!gart)
return;
if (gart) {
spin_lock(&gart->client_lock);
if (!list_empty(&gart->client)) {
struct gart_client *c;
spin_lock(&gart->client_lock);
if (!list_empty(&gart->client)) {
struct gart_client *c;
list_for_each_entry(c, &gart->client, list)
gart_iommu_detach_dev(domain, c->dev);
list_for_each_entry(c, &gart->client, list)
gart_iommu_detach_dev(domain, c->dev);
}
spin_unlock(&gart->client_lock);
}
spin_unlock(&gart->client_lock);
domain->priv = NULL;
kfree(gart_domain);
}
static int gart_iommu_map(struct iommu_domain *domain, unsigned long iova,
phys_addr_t pa, size_t bytes, int prot)
{
struct gart_device *gart = domain->priv;
struct gart_domain *gart_domain = to_gart_domain(domain);
struct gart_device *gart = gart_domain->gart;
unsigned long flags;
unsigned long pfn;
@ -265,7 +288,8 @@ static int gart_iommu_map(struct iommu_domain *domain, unsigned long iova,
static size_t gart_iommu_unmap(struct iommu_domain *domain, unsigned long iova,
size_t bytes)
{
struct gart_device *gart = domain->priv;
struct gart_domain *gart_domain = to_gart_domain(domain);
struct gart_device *gart = gart_domain->gart;
unsigned long flags;
if (!gart_iova_range_valid(gart, iova, bytes))
@ -281,7 +305,8 @@ static size_t gart_iommu_unmap(struct iommu_domain *domain, unsigned long iova,
static phys_addr_t gart_iommu_iova_to_phys(struct iommu_domain *domain,
dma_addr_t iova)
{
struct gart_device *gart = domain->priv;
struct gart_domain *gart_domain = to_gart_domain(domain);
struct gart_device *gart = gart_domain->gart;
unsigned long pte;
phys_addr_t pa;
unsigned long flags;
@ -310,8 +335,8 @@ static bool gart_iommu_capable(enum iommu_cap cap)
static const struct iommu_ops gart_iommu_ops = {
.capable = gart_iommu_capable,
.domain_init = gart_iommu_domain_init,
.domain_destroy = gart_iommu_domain_destroy,
.domain_alloc = gart_iommu_domain_alloc,
.domain_free = gart_iommu_domain_free,
.attach_dev = gart_iommu_attach_dev,
.detach_dev = gart_iommu_detach_dev,
.map = gart_iommu_map,