mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
![Andy Grover](/assets/img/avatar_default.png)
Some transports may support RDMA features. This handles the non-transport-specific parts, like pinning user pages and tracking mapped regions. Signed-off-by: Andy Grover <andy.grover@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
#ifndef _RDS_RDMA_H
|
|
#define _RDS_RDMA_H
|
|
|
|
#include <linux/rbtree.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/scatterlist.h>
|
|
|
|
#include "rds.h"
|
|
|
|
struct rds_mr {
|
|
struct rb_node r_rb_node;
|
|
atomic_t r_refcount;
|
|
u32 r_key;
|
|
|
|
/* A copy of the creation flags */
|
|
unsigned int r_use_once:1;
|
|
unsigned int r_invalidate:1;
|
|
unsigned int r_write:1;
|
|
|
|
/* This is for RDS_MR_DEAD.
|
|
* It would be nice & consistent to make this part of the above
|
|
* bit field here, but we need to use test_and_set_bit.
|
|
*/
|
|
unsigned long r_state;
|
|
struct rds_sock *r_sock; /* back pointer to the socket that owns us */
|
|
struct rds_transport *r_trans;
|
|
void *r_trans_private;
|
|
};
|
|
|
|
/* Flags for mr->r_state */
|
|
#define RDS_MR_DEAD 0
|
|
|
|
struct rds_rdma_op {
|
|
u32 r_key;
|
|
u64 r_remote_addr;
|
|
unsigned int r_write:1;
|
|
unsigned int r_fence:1;
|
|
unsigned int r_notify:1;
|
|
unsigned int r_recverr:1;
|
|
unsigned int r_mapped:1;
|
|
struct rds_notifier *r_notifier;
|
|
unsigned int r_bytes;
|
|
unsigned int r_nents;
|
|
unsigned int r_count;
|
|
struct scatterlist r_sg[0];
|
|
};
|
|
|
|
static inline rds_rdma_cookie_t rds_rdma_make_cookie(u32 r_key, u32 offset)
|
|
{
|
|
return r_key | (((u64) offset) << 32);
|
|
}
|
|
|
|
static inline u32 rds_rdma_cookie_key(rds_rdma_cookie_t cookie)
|
|
{
|
|
return cookie;
|
|
}
|
|
|
|
static inline u32 rds_rdma_cookie_offset(rds_rdma_cookie_t cookie)
|
|
{
|
|
return cookie >> 32;
|
|
}
|
|
|
|
int rds_get_mr(struct rds_sock *rs, char __user *optval, int optlen);
|
|
int rds_free_mr(struct rds_sock *rs, char __user *optval, int optlen);
|
|
void rds_rdma_drop_keys(struct rds_sock *rs);
|
|
int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm,
|
|
struct cmsghdr *cmsg);
|
|
int rds_cmsg_rdma_dest(struct rds_sock *rs, struct rds_message *rm,
|
|
struct cmsghdr *cmsg);
|
|
int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm,
|
|
struct cmsghdr *cmsg);
|
|
int rds_cmsg_rdma_map(struct rds_sock *rs, struct rds_message *rm,
|
|
struct cmsghdr *cmsg);
|
|
void rds_rdma_free_op(struct rds_rdma_op *ro);
|
|
void rds_rdma_send_complete(struct rds_message *rm, int);
|
|
|
|
extern void __rds_put_mr_final(struct rds_mr *mr);
|
|
static inline void rds_mr_put(struct rds_mr *mr)
|
|
{
|
|
if (atomic_dec_and_test(&mr->r_refcount))
|
|
__rds_put_mr_final(mr);
|
|
}
|
|
|
|
#endif
|