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iommu: add iommu_gas_remove_locked()

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(cherry picked from commit 273b4de3462d7825ebe4ace7a1930f098311287f)
This commit is contained in:
Konstantin Belousov 2023-12-14 04:41:31 +02:00
parent 5dcf0d72f6
commit 264e49515f
1 changed files with 57 additions and 26 deletions
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83
sys/dev/iommu/iommu_gas.c
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@ -708,28 +708,20 @@ iommu_gas_remove_unmap(struct iommu_domain *domain,
TAILQ_INSERT_TAIL(gcp, entry, dmamap_link);
}
/*
* Remove specified range from the GAS of the domain. Note that the
* removal is not guaranteed to occur upon the function return, it
* might be finalized some time after, when hardware reports that
* (queued) IOTLB invalidation was performed.
*/
void
iommu_gas_remove(struct iommu_domain *domain, iommu_gaddr_t start,
iommu_gaddr_t size)
static void
iommu_gas_remove_locked(struct iommu_domain *domain,
iommu_gaddr_t start, iommu_gaddr_t size,
struct iommu_map_entries_tailq *gc,
struct iommu_map_entry **r1, struct iommu_map_entry **r2)
{
struct iommu_map_entry *entry, *nentry, *r1, *r2;
struct iommu_map_entries_tailq gc;
struct iommu_map_entry *entry, *nentry;
iommu_gaddr_t end;
IOMMU_DOMAIN_ASSERT_LOCKED(domain);
end = start + size;
r1 = iommu_gas_alloc_entry(domain, IOMMU_PGF_WAITOK);
r2 = iommu_gas_alloc_entry(domain, IOMMU_PGF_WAITOK);
TAILQ_INIT(&gc);
IOMMU_DOMAIN_LOCK(domain);
nentry = iommu_gas_remove_clip_left(domain, start, end, &r1);
nentry = iommu_gas_remove_clip_left(domain, start, end, r1);
RB_FOREACH_FROM(entry, iommu_gas_entries_tree, nentry) {
if (entry->start >= end)
break;
@ -738,11 +730,11 @@ iommu_gas_remove(struct iommu_domain *domain, iommu_gaddr_t start,
entry->start, entry->end, start));
if ((entry->flags & IOMMU_MAP_ENTRY_RMRR) != 0)
continue;
iommu_gas_remove_unmap(domain, entry, &gc);
iommu_gas_remove_unmap(domain, entry, gc);
}
if (iommu_gas_remove_clip_right(domain, end, entry, r2)) {
iommu_gas_remove_unmap(domain, r2, &gc);
r2 = NULL;
if (iommu_gas_remove_clip_right(domain, end, entry, *r2)) {
iommu_gas_remove_unmap(domain, *r2, gc);
*r2 = NULL;
}
#ifdef INVARIANTS
@ -755,13 +747,52 @@ iommu_gas_remove(struct iommu_domain *domain, iommu_gaddr_t start,
entry->start, entry->end, start, end));
}
#endif
}
static void
iommu_gas_remove_init(struct iommu_domain *domain,
struct iommu_map_entries_tailq *gc, struct iommu_map_entry **r1,
struct iommu_map_entry **r2)
{
TAILQ_INIT(gc);
*r1 = iommu_gas_alloc_entry(domain, IOMMU_PGF_WAITOK);
*r2 = iommu_gas_alloc_entry(domain, IOMMU_PGF_WAITOK);
}
static void
iommu_gas_remove_cleanup(struct iommu_domain *domain,
struct iommu_map_entries_tailq *gc, struct iommu_map_entry **r1,
struct iommu_map_entry **r2)
{
if (*r1 != NULL) {
iommu_gas_free_entry(*r1);
*r1 = NULL;
}
if (*r2 != NULL) {
iommu_gas_free_entry(*r2);
*r2 = NULL;
}
iommu_domain_unload(domain, gc, true);
}
/*
* Remove specified range from the GAS of the domain. Note that the
* removal is not guaranteed to occur upon the function return, it
* might be finalized some time after, when hardware reports that
* (queued) IOTLB invalidation was performed.
*/
void
iommu_gas_remove(struct iommu_domain *domain, iommu_gaddr_t start,
iommu_gaddr_t size)
{
struct iommu_map_entry *r1, *r2;
struct iommu_map_entries_tailq gc;
iommu_gas_remove_init(domain, &gc, &r1, &r2);
IOMMU_DOMAIN_LOCK(domain);
iommu_gas_remove_locked(domain, start, size, &gc, &r1, &r2);
IOMMU_DOMAIN_UNLOCK(domain);
if (r1 != NULL)
iommu_gas_free_entry(r1);
if (r2 != NULL)
iommu_gas_free_entry(r2);
iommu_domain_unload(domain, &gc, true);
iommu_gas_remove_cleanup(domain, &gc, &r1, &r2);
}
int