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iommu/vt-d: Consolidate domain_init() to avoid duplication 

The domain_init() and md_domain_init() do almost the same job.
Consolidate them to avoid duplication.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Lu Baolu 2019-06-12 08:28:51 +08:00 committed by Joerg Roedel
parent 16c9e29e12
commit 123b2ffc37
1 changed files with 36 additions and 87 deletions
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123
drivers/iommu/intel-iommu.c
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@ -1841,63 +1841,6 @@ static inline int guestwidth_to_adjustwidth(int gaw)
return agaw;
}
static int domain_init(struct dmar_domain *domain, struct intel_iommu *iommu,
int guest_width)
{
int adjust_width, agaw;
unsigned long sagaw;
int err;
init_iova_domain(&domain->iovad, VTD_PAGE_SIZE, IOVA_START_PFN);
err = init_iova_flush_queue(&domain->iovad,
iommu_flush_iova, iova_entry_free);
if (err)
return err;
domain_reserve_special_ranges(domain);
/* calculate AGAW */
if (guest_width > cap_mgaw(iommu->cap))
guest_width = cap_mgaw(iommu->cap);
domain->gaw = guest_width;
adjust_width = guestwidth_to_adjustwidth(guest_width);
agaw = width_to_agaw(adjust_width);
sagaw = cap_sagaw(iommu->cap);
if (!test_bit(agaw, &sagaw)) {
/* hardware doesn't support it, choose a bigger one */
pr_debug("Hardware doesn't support agaw %d\n", agaw);
agaw = find_next_bit(&sagaw, 5, agaw);
if (agaw >= 5)
return -ENODEV;
}
domain->agaw = agaw;
if (ecap_coherent(iommu->ecap))
domain->iommu_coherency = 1;
else
domain->iommu_coherency = 0;
if (ecap_sc_support(iommu->ecap))
domain->iommu_snooping = 1;
else
domain->iommu_snooping = 0;
if (intel_iommu_superpage)
domain->iommu_superpage = fls(cap_super_page_val(iommu->cap));
else
domain->iommu_superpage = 0;
domain->nid = iommu->node;
/* always allocate the top pgd */
domain->pgd = (struct dma_pte *)alloc_pgtable_page(domain->nid);
if (!domain->pgd)
return -ENOMEM;
__iommu_flush_cache(iommu, domain->pgd, PAGE_SIZE);
return 0;
}
static void domain_exit(struct dmar_domain *domain)
{
struct page *freelist;
@ -2578,6 +2521,31 @@ static int get_last_alias(struct pci_dev *pdev, u16 alias, void *opaque)
return 0;
}
static int domain_init(struct dmar_domain *domain, int guest_width)
{
int adjust_width;
init_iova_domain(&domain->iovad, VTD_PAGE_SIZE, IOVA_START_PFN);
domain_reserve_special_ranges(domain);
/* calculate AGAW */
domain->gaw = guest_width;
adjust_width = guestwidth_to_adjustwidth(guest_width);
domain->agaw = width_to_agaw(adjust_width);
domain->iommu_coherency = 0;
domain->iommu_snooping = 0;
domain->iommu_superpage = 0;
domain->max_addr = 0;
/* always allocate the top pgd */
domain->pgd = (struct dma_pte *)alloc_pgtable_page(domain->nid);
if (!domain->pgd)
return -ENOMEM;
domain_flush_cache(domain, domain->pgd, PAGE_SIZE);
return 0;
}
static struct dmar_domain *find_or_alloc_domain(struct device *dev, int gaw)
{
struct device_domain_info *info;
@ -2615,11 +2583,19 @@ static struct dmar_domain *find_or_alloc_domain(struct device *dev, int gaw)
domain = alloc_domain(0);
if (!domain)
return NULL;
if (domain_init(domain, iommu, gaw)) {
if (domain_init(domain, gaw)) {
domain_exit(domain);
return NULL;
}
if (init_iova_flush_queue(&domain->iovad,
iommu_flush_iova,
iova_entry_free)) {
pr_warn("iova flush queue initialization failed\n");
intel_iommu_strict = 1;
}
out:
return domain;
}
@ -2724,8 +2700,6 @@ static int domain_prepare_identity_map(struct device *dev,
return iommu_domain_identity_map(domain, start, end);
}
static int md_domain_init(struct dmar_domain *domain, int guest_width);
static int __init si_domain_init(int hw)
{
struct dmar_rmrr_unit *rmrr;
@ -2736,7 +2710,7 @@ static int __init si_domain_init(int hw)
if (!si_domain)
return -EFAULT;
if (md_domain_init(si_domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) {
if (domain_init(si_domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) {
domain_exit(si_domain);
return -EFAULT;
}
@ -4865,31 +4839,6 @@ static void dmar_remove_one_dev_info(struct device *dev)
spin_unlock_irqrestore(&device_domain_lock, flags);
}
static int md_domain_init(struct dmar_domain *domain, int guest_width)
{
int adjust_width;
init_iova_domain(&domain->iovad, VTD_PAGE_SIZE, IOVA_START_PFN);
domain_reserve_special_ranges(domain);
/* calculate AGAW */
domain->gaw = guest_width;
adjust_width = guestwidth_to_adjustwidth(guest_width);
domain->agaw = width_to_agaw(adjust_width);
domain->iommu_coherency = 0;
domain->iommu_snooping = 0;
domain->iommu_superpage = 0;
domain->max_addr = 0;
/* always allocate the top pgd */
domain->pgd = (struct dma_pte *)alloc_pgtable_page(domain->nid);
if (!domain->pgd)
return -ENOMEM;
domain_flush_cache(domain, domain->pgd, PAGE_SIZE);
return 0;
}
static struct iommu_domain *intel_iommu_domain_alloc(unsigned type)
{
struct dmar_domain *dmar_domain;
@ -4904,7 +4853,7 @@ static struct iommu_domain *intel_iommu_domain_alloc(unsigned type)
pr_err("Can't allocate dmar_domain\n");
return NULL;
}
if (md_domain_init(dmar_domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) {
if (domain_init(dmar_domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) {
pr_err("Domain initialization failed\n");
domain_exit(dmar_domain);
return NULL;