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RDMA: Handle PD allocations by IB/core

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The PD allocations in IB/core allows us to simplify drivers and their
error flows in their .alloc_pd() paths. The changes in .alloc_pd() go hand
in had with relevant update in .dealloc_pd().

We will use this opportunity and convert .dealloc_pd() to don't fail, as
it was suggested a long time ago, failures are not happening as we have
never seen a WARN_ON print.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Leon Romanovsky
2019-02-03 14:55:51 +02:00
committed by Jason Gunthorpe
parent 30471d4b20
commit 21a428a019
39 changed files with 325 additions and 409 deletions
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60
drivers/infiniband/sw/rxe/rxe_pool.c
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@@ -46,6 +46,7 @@ struct rxe_type_info rxe_type_info[RXE_NUM_TYPES] = {
[RXE_TYPE_PD] = {
.name = "rxe-pd",
.size = sizeof(struct rxe_pd),
.flags = RXE_POOL_NO_ALLOC,
},
[RXE_TYPE_AH] = {
.name = "rxe-ah",
@@ -119,8 +120,10 @@ static void rxe_cache_clean(size_t cnt)
for (i = 0; i < cnt; i++) {
type = &rxe_type_info[i];
kmem_cache_destroy(type->cache);
type->cache = NULL;
if (!(type->flags & RXE_POOL_NO_ALLOC)) {
kmem_cache_destroy(type->cache);
type->cache = NULL;
}
}
}
@@ -134,14 +137,17 @@ int rxe_cache_init(void)
for (i = 0; i < RXE_NUM_TYPES; i++) {
type = &rxe_type_info[i];
size = ALIGN(type->size, RXE_POOL_ALIGN);
type->cache = kmem_cache_create(type->name, size,
RXE_POOL_ALIGN,
RXE_POOL_CACHE_FLAGS, NULL);
if (!type->cache) {
pr_err("Unable to init kmem cache for %s\n",
type->name);
err = -ENOMEM;
goto err1;
if (!(type->flags & RXE_POOL_NO_ALLOC)) {
type->cache =
kmem_cache_create(type->name, size,
RXE_POOL_ALIGN,
RXE_POOL_CACHE_FLAGS, NULL);
if (!type->cache) {
pr_err("Unable to init kmem cache for %s\n",
type->name);
err = -ENOMEM;
goto err1;
}
}
}
@@ -415,6 +421,37 @@ out_put_pool:
return NULL;
}
int rxe_add_to_pool(struct rxe_pool *pool, struct rxe_pool_entry *elem)
{
unsigned long flags;
might_sleep_if(!(pool->flags & RXE_POOL_ATOMIC));
read_lock_irqsave(&pool->pool_lock, flags);
if (pool->state != RXE_POOL_STATE_VALID) {
read_unlock_irqrestore(&pool->pool_lock, flags);
return -EINVAL;
}
kref_get(&pool->ref_cnt);
read_unlock_irqrestore(&pool->pool_lock, flags);
kref_get(&pool->rxe->ref_cnt);
if (atomic_inc_return(&pool->num_elem) > pool->max_elem)
goto out_put_pool;
elem->pool = pool;
kref_init(&elem->ref_cnt);
return 0;
out_put_pool:
atomic_dec(&pool->num_elem);
rxe_dev_put(pool->rxe);
rxe_pool_put(pool);
return -EINVAL;
}
void rxe_elem_release(struct kref *kref)
{
struct rxe_pool_entry *elem =
@@ -424,7 +461,8 @@ void rxe_elem_release(struct kref *kref)
if (pool->cleanup)
pool->cleanup(elem);
kmem_cache_free(pool_cache(pool), elem);
if (!(pool->flags & RXE_POOL_NO_ALLOC))
kmem_cache_free(pool_cache(pool), elem);
atomic_dec(&pool->num_elem);
rxe_dev_put(pool->rxe);
rxe_pool_put(pool);