From: Bob Pearson <rpearsonhpe@gmail.com>
Date: Tue, 8 Feb 2022 15:16:40 -0600
Subject: RDMA/rxe: Remove key'ed object support
Patch-mainline: v5.18-rc1
Git-commit: d2ccf0411d253433409278cd517a091a5b7b613e
References: jsc#PED-1111
Now that rxe_mcast.c has it's own red-black tree support there is no
longer any requirement for key'ed objects in rxe pools. This patch removes
the key APIs and related code.
Link: https://lore.kernel.org/r/20220208211644.123457-7-rpearsonhpe@gmail.com
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/infiniband/sw/rxe/rxe_pool.c | 126 -----------------------------------
drivers/infiniband/sw/rxe/rxe_pool.h | 38 ----------
2 files changed, 164 deletions(-)
--- a/drivers/infiniband/sw/rxe/rxe_pool.c
+++ b/drivers/infiniband/sw/rxe/rxe_pool.c
@@ -16,8 +16,6 @@ static const struct rxe_type_info {
enum rxe_pool_flags flags;
u32 min_index;
u32 max_index;
- size_t key_offset;
- size_t key_size;
} rxe_type_info[RXE_NUM_TYPES] = {
[RXE_TYPE_UC] = {
.name = "rxe-uc",
@@ -147,12 +145,6 @@ int rxe_pool_init(
goto out;
}
- if (pool->flags & RXE_POOL_KEY) {
- pool->key.tree = RB_ROOT;
- pool->key.key_offset = info->key_offset;
- pool->key.key_size = info->key_size;
- }
-
out:
return err;
}
@@ -209,79 +201,6 @@ static int rxe_insert_index(struct rxe_p
return 0;
}
-static int rxe_insert_key(struct rxe_pool *pool, struct rxe_pool_elem *new)
-{
- struct rb_node **link = &pool->key.tree.rb_node;
- struct rb_node *parent = NULL;
- struct rxe_pool_elem *elem;
- int cmp;
-
- while (*link) {
- parent = *link;
- elem = rb_entry(parent, struct rxe_pool_elem, key_node);
-
- cmp = memcmp((u8 *)elem + pool->key.key_offset,
- (u8 *)new + pool->key.key_offset,
- pool->key.key_size);
-
- if (cmp == 0) {
- pr_warn("key already exists!\n");
- return -EINVAL;
- }
-
- if (cmp > 0)
- link = &(*link)->rb_left;
- else
- link = &(*link)->rb_right;
- }
-
- rb_link_node(&new->key_node, parent, link);
- rb_insert_color(&new->key_node, &pool->key.tree);
-
- return 0;
-}
-
-int __rxe_add_key_locked(struct rxe_pool_elem *elem, void *key)
-{
- struct rxe_pool *pool = elem->pool;
- int err;
-
- memcpy((u8 *)elem + pool->key.key_offset, key, pool->key.key_size);
- err = rxe_insert_key(pool, elem);
-
- return err;
-}
-
-int __rxe_add_key(struct rxe_pool_elem *elem, void *key)
-{
- struct rxe_pool *pool = elem->pool;
- unsigned long flags;
- int err;
-
- write_lock_irqsave(&pool->pool_lock, flags);
- err = __rxe_add_key_locked(elem, key);
- write_unlock_irqrestore(&pool->pool_lock, flags);
-
- return err;
-}
-
-void __rxe_drop_key_locked(struct rxe_pool_elem *elem)
-{
- struct rxe_pool *pool = elem->pool;
-
- rb_erase(&elem->key_node, &pool->key.tree);
-}
-
-void __rxe_drop_key(struct rxe_pool_elem *elem)
-{
- struct rxe_pool *pool = elem->pool;
- unsigned long flags;
-
- write_lock_irqsave(&pool->pool_lock, flags);
- __rxe_drop_key_locked(elem);
- write_unlock_irqrestore(&pool->pool_lock, flags);
-}
-
int __rxe_add_index_locked(struct rxe_pool_elem *elem)
{
struct rxe_pool *pool = elem->pool;
@@ -447,49 +366,4 @@ void *rxe_pool_get_index(struct rxe_pool
read_unlock_irqrestore(&pool->pool_lock, flags);
return obj;
-}
-
-void *rxe_pool_get_key_locked(struct rxe_pool *pool, void *key)
-{
- struct rb_node *node;
- struct rxe_pool_elem *elem;
- void *obj;
- int cmp;
-
- node = pool->key.tree.rb_node;
-
- while (node) {
- elem = rb_entry(node, struct rxe_pool_elem, key_node);
-
- cmp = memcmp((u8 *)elem + pool->key.key_offset,
- key, pool->key.key_size);
-
- if (cmp > 0)
- node = node->rb_left;
- else if (cmp < 0)
- node = node->rb_right;
- else
- break;
- }
-
- if (node) {
- kref_get(&elem->ref_cnt);
- obj = elem->obj;
- } else {
- obj = NULL;
- }
-
- return obj;
-}
-
-void *rxe_pool_get_key(struct rxe_pool *pool, void *key)
-{
- unsigned long flags;
- void *obj;
-
- read_lock_irqsave(&pool->pool_lock, flags);
- obj = rxe_pool_get_key_locked(pool, key);
- read_unlock_irqrestore(&pool->pool_lock, flags);
-
- return obj;
}
--- a/drivers/infiniband/sw/rxe/rxe_pool.h
+++ b/drivers/infiniband/sw/rxe/rxe_pool.h
@@ -9,7 +9,6 @@
enum rxe_pool_flags {
RXE_POOL_INDEX = BIT(1),
- RXE_POOL_KEY = BIT(2),
RXE_POOL_NO_ALLOC = BIT(4),
};
@@ -32,9 +31,6 @@ struct rxe_pool_elem {
struct kref ref_cnt;
struct list_head list;
- /* only used if keyed */
- struct rb_node key_node;
-
/* only used if indexed */
struct rb_node index_node;
u32 index;
@@ -61,13 +57,6 @@ struct rxe_pool {
u32 max_index;
u32 min_index;
} index;
-
- /* only used if keyed */
- struct {
- struct rb_root tree;
- size_t key_offset;
- size_t key_size;
- } key;
};
/* initialize a pool of objects with given limit on
@@ -112,26 +101,6 @@ void __rxe_drop_index(struct rxe_pool_el
#define rxe_drop_index(obj) __rxe_drop_index(&(obj)->elem)
-/* assign a key to a keyed object and insert object into
- * pool's rb tree holding and not holding pool_lock
- */
-int __rxe_add_key_locked(struct rxe_pool_elem *elem, void *key);
-
-#define rxe_add_key_locked(obj, key) __rxe_add_key_locked(&(obj)->elem, key)
-
-int __rxe_add_key(struct rxe_pool_elem *elem, void *key);
-
-#define rxe_add_key(obj, key) __rxe_add_key(&(obj)->elem, key)
-
-/* remove elem from rb tree holding and not holding the pool_lock */
-void __rxe_drop_key_locked(struct rxe_pool_elem *elem);
-
-#define rxe_drop_key_locked(obj) __rxe_drop_key_locked(&(obj)->elem)
-
-void __rxe_drop_key(struct rxe_pool_elem *elem);
-
-#define rxe_drop_key(obj) __rxe_drop_key(&(obj)->elem)
-
/* lookup an indexed object from index holding and not holding the pool_lock.
* takes a reference on object
*/
@@ -139,13 +108,6 @@ void *rxe_pool_get_index_locked(struct r
void *rxe_pool_get_index(struct rxe_pool *pool, u32 index);
-/* lookup keyed object from key holding and not holding the pool_lock.
- * takes a reference on the objecti
- */
-void *rxe_pool_get_key_locked(struct rxe_pool *pool, void *key);
-
-void *rxe_pool_get_key(struct rxe_pool *pool, void *key);
-
/* cleanup an object when all references are dropped */
void rxe_elem_release(struct kref *kref);