Squash and simplify some of the freeing code, and move the init
and free routines down into the rest of the flush queue code to
obviate the forward declarations.
Signed-off-by: Robin Murphy <robin.murphy@xxxxxxx>
---
v2: Rebase with del_timer_sync() change
drivers/iommu/iova.c | 131 +++++++++++++++++++------------------------
1 file changed, 58 insertions(+), 73 deletions(-)
diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c
index a0250cebcdcf..c19f9a749070 100644
--- a/drivers/iommu/iova.c
+++ b/drivers/iommu/iova.c
@@ -24,8 +24,6 @@ static unsigned long iova_rcache_get(struct iova_domain *iovad,
static void init_iova_rcaches(struct iova_domain *iovad);
static void free_cpu_cached_iovas(unsigned int cpu, struct iova_domain *iovad);
static void free_iova_rcaches(struct iova_domain *iovad);
-static void fq_destroy_all_entries(struct iova_domain *iovad);
-static void fq_flush_timeout(struct timer_list *t);
static int iova_cpuhp_dead(unsigned int cpu, struct hlist_node *node)
{
@@ -73,60 +71,6 @@ init_iova_domain(struct iova_domain *iovad, unsigned long granule,
}
EXPORT_SYMBOL_GPL(init_iova_domain);
-static bool has_iova_flush_queue(struct iova_domain *iovad)
-{
- return !!iovad->fq;
-}
-
-static void free_iova_flush_queue(struct iova_domain *iovad)
-{
- if (!has_iova_flush_queue(iovad))
- return;
-
- del_timer_sync(&iovad->fq_timer);
-
- fq_destroy_all_entries(iovad);
-
- free_percpu(iovad->fq);
-
- iovad->fq = NULL;
- iovad->fq_domain = NULL;
-}
-
-int init_iova_flush_queue(struct iova_domain *iovad, struct iommu_domain *fq_domain)
-{
- struct iova_fq __percpu *queue;
- int i, cpu;
-
- atomic64_set(&iovad->fq_flush_start_cnt, 0);
- atomic64_set(&iovad->fq_flush_finish_cnt, 0);
-
- queue = alloc_percpu(struct iova_fq);
- if (!queue)
- return -ENOMEM;
-
- for_each_possible_cpu(cpu) {
- struct iova_fq *fq;
-
- fq = per_cpu_ptr(queue, cpu);
- fq->head = 0;
- fq->tail = 0;
-
- spin_lock_init(&fq->lock);
-
- for (i = 0; i < IOVA_FQ_SIZE; i++)
- INIT_LIST_HEAD(&fq->entries[i].freelist);
- }
-
- iovad->fq_domain = fq_domain;
- iovad->fq = queue;
-
- timer_setup(&iovad->fq_timer, fq_flush_timeout, 0);
- atomic_set(&iovad->fq_timer_on, 0);
-
- return 0;
-}
-
static struct rb_node *
__get_cached_rbnode(struct iova_domain *iovad, unsigned long limit_pfn)
{
@@ -585,23 +529,6 @@ static void iova_domain_flush(struct iova_domain *iovad)
atomic64_inc(&iovad->fq_flush_finish_cnt);
}
-static void fq_destroy_all_entries(struct iova_domain *iovad)
-{
- int cpu;
-
- /*
- * This code runs when the iova_domain is being detroyed, so don't
- * bother to free iovas, just free any remaining pagetable pages.
- */
- for_each_possible_cpu(cpu) {
- struct iova_fq *fq = per_cpu_ptr(iovad->fq, cpu);
- int idx;
-
- fq_ring_for_each(idx, fq)
- put_pages_list(&fq->entries[idx].freelist);
- }
-}
-
static void fq_flush_timeout(struct timer_list *t)
{
struct iova_domain *iovad = from_timer(iovad, t, fq_timer);
@@ -669,6 +596,64 @@ void queue_iova(struct iova_domain *iovad,
jiffies + msecs_to_jiffies(IOVA_FQ_TIMEOUT));
}
+static void free_iova_flush_queue(struct iova_domain *iovad)
+{
+ int cpu, idx;
+
+ if (!iovad->fq)
+ return;
+
+ del_timer_sync(&iovad->fq_timer);
+ /*
+ * This code runs when the iova_domain is being detroyed, so don't
+ * bother to free iovas, just free any remaining pagetable pages.
+ */
+ for_each_possible_cpu(cpu) {
+ struct iova_fq *fq = per_cpu_ptr(iovad->fq, cpu);
+
+ fq_ring_for_each(idx, fq)
+ put_pages_list(&fq->entries[idx].freelist);
+ }
+
+ free_percpu(iovad->fq);
+
+ iovad->fq = NULL;
+ iovad->fq_domain = NULL;
+}
+
+int init_iova_flush_queue(struct iova_domain *iovad, struct iommu_domain *fq_domain)
+{
+ struct iova_fq __percpu *queue;
+ int i, cpu;
+
+ atomic64_set(&iovad->fq_flush_start_cnt, 0);
+ atomic64_set(&iovad->fq_flush_finish_cnt, 0);
+
+ queue = alloc_percpu(struct iova_fq);
+ if (!queue)
+ return -ENOMEM;
+
+ for_each_possible_cpu(cpu) {
+ struct iova_fq *fq = per_cpu_ptr(queue, cpu);
+
+ fq->head = 0;
+ fq->tail = 0;
+
+ spin_lock_init(&fq->lock);
+
+ for (i = 0; i < IOVA_FQ_SIZE; i++)
+ INIT_LIST_HEAD(&fq->entries[i].freelist);
+ }
+
+ iovad->fq_domain = fq_domain;
+ iovad->fq = queue;
+
+ timer_setup(&iovad->fq_timer, fq_flush_timeout, 0);
+ atomic_set(&iovad->fq_timer_on, 0);
+
+ return 0;
+}
+
/**
* put_iova_domain - destroys the iova domain
* @iovad: - iova domain in question.
--
2.28.0.dirty
