| Andy Grover | eff5f53 | 2009-02-24 15:30:29 +0000 | [diff] [blame] | 1 | #ifndef _RDS_RDMA_H |
| 2 | #define _RDS_RDMA_H |
| 3 | |
| 4 | #include <linux/rbtree.h> |
| 5 | #include <linux/spinlock.h> |
| 6 | #include <linux/scatterlist.h> |
| 7 | |
| 8 | #include "rds.h" |
| 9 | |
| 10 | struct rds_mr { |
| 11 | struct rb_node r_rb_node; |
| 12 | atomic_t r_refcount; |
| 13 | u32 r_key; |
| 14 | |
| 15 | /* A copy of the creation flags */ |
| 16 | unsigned int r_use_once:1; |
| 17 | unsigned int r_invalidate:1; |
| 18 | unsigned int r_write:1; |
| 19 | |
| 20 | /* This is for RDS_MR_DEAD. |
| 21 | * It would be nice & consistent to make this part of the above |
| 22 | * bit field here, but we need to use test_and_set_bit. |
| 23 | */ |
| 24 | unsigned long r_state; |
| 25 | struct rds_sock *r_sock; /* back pointer to the socket that owns us */ |
| 26 | struct rds_transport *r_trans; |
| 27 | void *r_trans_private; |
| 28 | }; |
| 29 | |
| 30 | /* Flags for mr->r_state */ |
| 31 | #define RDS_MR_DEAD 0 |
| 32 | |
| 33 | struct rds_rdma_op { |
| 34 | u32 r_key; |
| 35 | u64 r_remote_addr; |
| 36 | unsigned int r_write:1; |
| 37 | unsigned int r_fence:1; |
| 38 | unsigned int r_notify:1; |
| 39 | unsigned int r_recverr:1; |
| 40 | unsigned int r_mapped:1; |
| 41 | struct rds_notifier *r_notifier; |
| 42 | unsigned int r_bytes; |
| 43 | unsigned int r_nents; |
| 44 | unsigned int r_count; |
| 45 | struct scatterlist r_sg[0]; |
| 46 | }; |
| 47 | |
| 48 | static inline rds_rdma_cookie_t rds_rdma_make_cookie(u32 r_key, u32 offset) |
| 49 | { |
| 50 | return r_key | (((u64) offset) << 32); |
| 51 | } |
| 52 | |
| 53 | static inline u32 rds_rdma_cookie_key(rds_rdma_cookie_t cookie) |
| 54 | { |
| 55 | return cookie; |
| 56 | } |
| 57 | |
| 58 | static inline u32 rds_rdma_cookie_offset(rds_rdma_cookie_t cookie) |
| 59 | { |
| 60 | return cookie >> 32; |
| 61 | } |
| 62 | |
| 63 | int rds_get_mr(struct rds_sock *rs, char __user *optval, int optlen); |
| 64 | int rds_free_mr(struct rds_sock *rs, char __user *optval, int optlen); |
| 65 | void rds_rdma_drop_keys(struct rds_sock *rs); |
| 66 | int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm, |
| 67 | struct cmsghdr *cmsg); |
| 68 | int rds_cmsg_rdma_dest(struct rds_sock *rs, struct rds_message *rm, |
| 69 | struct cmsghdr *cmsg); |
| 70 | int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm, |
| 71 | struct cmsghdr *cmsg); |
| 72 | int rds_cmsg_rdma_map(struct rds_sock *rs, struct rds_message *rm, |
| 73 | struct cmsghdr *cmsg); |
| 74 | void rds_rdma_free_op(struct rds_rdma_op *ro); |
| 75 | void rds_rdma_send_complete(struct rds_message *rm, int); |
| 76 | |
| 77 | extern void __rds_put_mr_final(struct rds_mr *mr); |
| 78 | static inline void rds_mr_put(struct rds_mr *mr) |
| 79 | { |
| 80 | if (atomic_dec_and_test(&mr->r_refcount)) |
| 81 | __rds_put_mr_final(mr); |
| 82 | } |
| 83 | |
| 84 | #endif |