Page MenuHomeFreeBSD
Differential D25665 Diff 74622 head/sys/x86/iommu/intel_gas.c

Changeset View

Standalone View

View Options

head/sys/x86/iommu/intel_gas.c

Show First 20 Lines • Show All 92 Lines • ▼ Show 20 Linesdmar_gas_alloc_entry(struct dmar_domain *domain, u_int flags)
KASSERT((flags & ~(DMAR_PGF_WAITOK)) == 0, KASSERT((flags & ~(DMAR_PGF_WAITOK)) == 0,
("unsupported flags %x", flags)); ("unsupported flags %x", flags));
res = uma_zalloc(iommu_map_entry_zone, ((flags & DMAR_PGF_WAITOK) != res = uma_zalloc(iommu_map_entry_zone, ((flags & DMAR_PGF_WAITOK) !=
0 ? M_WAITOK : M_NOWAIT) | M_ZERO); 0 ? M_WAITOK : M_NOWAIT) | M_ZERO);
if (res != NULL) { if (res != NULL) {
res->domain = (struct iommu_domain *)domain; res->domain = (struct iommu_domain *)domain;
atomic_add_int(&domain->entries_cnt, 1); atomic_add_int(&domain->iodom.entries_cnt, 1);
} }
return (res); return (res);
} }
void void
dmar_gas_free_entry(struct dmar_domain *domain, struct iommu_map_entry *entry) dmar_gas_free_entry(struct dmar_domain *domain, struct iommu_map_entry *entry)
{ {
KASSERT(domain == (struct dmar_domain *)entry->domain, KASSERT(domain == (struct dmar_domain *)entry->domain,
("mismatched free domain %p entry %p entry->domain %p", domain, ("mismatched free domain %p entry %p entry->domain %p", domain,
entry, entry->domain)); entry, entry->domain));
atomic_subtract_int(&domain->entries_cnt, 1); atomic_subtract_int(&domain->iodom.entries_cnt, 1);
uma_zfree(iommu_map_entry_zone, entry); uma_zfree(iommu_map_entry_zone, entry);
} }
static int static int
dmar_gas_cmp_entries(struct iommu_map_entry *a, struct iommu_map_entry *b) dmar_gas_cmp_entries(struct iommu_map_entry *a, struct iommu_map_entry *b)
{ {
/* Last entry have zero size, so <= */ /* Last entry have zero size, so <= */
▲ Show 20 Lines • Show All 87 Lines • ▼ Show 20 Lines
dmar_gas_init_domain(struct dmar_domain *domain) dmar_gas_init_domain(struct dmar_domain *domain)
{ {
struct iommu_map_entry *begin, *end; struct iommu_map_entry *begin, *end;
begin = dmar_gas_alloc_entry(domain, DMAR_PGF_WAITOK); begin = dmar_gas_alloc_entry(domain, DMAR_PGF_WAITOK);
end = dmar_gas_alloc_entry(domain, DMAR_PGF_WAITOK); end = dmar_gas_alloc_entry(domain, DMAR_PGF_WAITOK);
DMAR_DOMAIN_LOCK(domain); DMAR_DOMAIN_LOCK(domain);
KASSERT(domain->entries_cnt == 2, ("dirty domain %p", domain)); KASSERT(domain->iodom.entries_cnt == 2, ("dirty domain %p", domain));
KASSERT(RB_EMPTY(&domain->rb_root), ("non-empty entries %p", domain)); KASSERT(RB_EMPTY(&domain->rb_root), ("non-empty entries %p", domain));
begin->start = 0; begin->start = 0;
begin->end = DMAR_PAGE_SIZE; begin->end = DMAR_PAGE_SIZE;
begin->flags = IOMMU_MAP_ENTRY_PLACE | IOMMU_MAP_ENTRY_UNMAPPED; begin->flags = IOMMU_MAP_ENTRY_PLACE | IOMMU_MAP_ENTRY_UNMAPPED;
dmar_gas_rb_insert(domain, begin); dmar_gas_rb_insert(domain, begin);
end->start = domain->end; end->start = domain->end;
end->end = domain->end; end->end = domain->end;
end->flags = IOMMU_MAP_ENTRY_PLACE | IOMMU_MAP_ENTRY_UNMAPPED; end->flags = IOMMU_MAP_ENTRY_PLACE | IOMMU_MAP_ENTRY_UNMAPPED;
dmar_gas_rb_insert(domain, end); dmar_gas_rb_insert(domain, end);
domain->first_place = begin; domain->first_place = begin;
domain->last_place = end; domain->last_place = end;
domain->flags |= DMAR_DOMAIN_GAS_INITED; domain->flags |= DMAR_DOMAIN_GAS_INITED;
DMAR_DOMAIN_UNLOCK(domain); DMAR_DOMAIN_UNLOCK(domain);
} }
void void
dmar_gas_fini_domain(struct dmar_domain *domain) dmar_gas_fini_domain(struct dmar_domain *domain)
{ {
struct iommu_map_entry *entry, *entry1; struct iommu_map_entry *entry, *entry1;
DMAR_DOMAIN_ASSERT_LOCKED(domain); DMAR_DOMAIN_ASSERT_LOCKED(domain);
KASSERT(domain->entries_cnt == 2, ("domain still in use %p", domain)); KASSERT(domain->iodom.entries_cnt == 2,
("domain still in use %p", domain));
entry = RB_MIN(dmar_gas_entries_tree, &domain->rb_root); entry = RB_MIN(dmar_gas_entries_tree, &domain->rb_root);
KASSERT(entry->start == 0, ("start entry start %p", domain)); KASSERT(entry->start == 0, ("start entry start %p", domain));
KASSERT(entry->end == DMAR_PAGE_SIZE, ("start entry end %p", domain)); KASSERT(entry->end == DMAR_PAGE_SIZE, ("start entry end %p", domain));
KASSERT(entry->flags == IOMMU_MAP_ENTRY_PLACE, KASSERT(entry->flags == IOMMU_MAP_ENTRY_PLACE,
("start entry flags %p", domain)); ("start entry flags %p", domain));
RB_REMOVE(dmar_gas_entries_tree, &domain->rb_root, entry); RB_REMOVE(dmar_gas_entries_tree, &domain->rb_root, entry);
dmar_gas_free_entry(domain, entry); dmar_gas_free_entry(domain, entry);
▲ Show 20 Lines • Show All 491 Lines • Show Last 20 Lines