Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 153 insertions, 40 deletions

diff --git a/net/rds/rds.h b/net/rds/rds.h
index c224b5bb3ba9..da8adac2bf06 100644
--- a/net/rds/rds.h
+++ b/net/rds/rds.h
@@ -50,7 +50,6 @@ rdsdebug(char *fmt, ...)
 #define RDS_FRAG_SIZE   ((unsigned int)(1 << RDS_FRAG_SHIFT))
 
 #define RDS_CONG_MAP_BYTES      (65536 / 8)
-#define RDS_CONG_MAP_LONGS      (RDS_CONG_MAP_BYTES / sizeof(unsigned long))
 #define RDS_CONG_MAP_PAGES      (PAGE_ALIGN(RDS_CONG_MAP_BYTES) / PAGE_SIZE)
 #define RDS_CONG_MAP_PAGE_BITS  (PAGE_SIZE * 8)
 
@@ -80,6 +79,7 @@ enum {
 /* Bits for c_flags */
 #define RDS_LL_SEND_FULL        0
 #define RDS_RECONNECT_PENDING   1
+#define RDS_IN_XMIT             2
 
 struct rds_connection {
         struct hlist_node       c_hash_node;
@@ -91,12 +91,13 @@ struct rds_connection {
         struct rds_cong_map     *c_lcong;
         struct rds_cong_map     *c_fcong;
 
-        struct mutex            c_send_lock;    /* protect send ring */
         struct rds_message      *c_xmit_rm;
         unsigned long           c_xmit_sg;
         unsigned int            c_xmit_hdr_off;
         unsigned int            c_xmit_data_off;
+        unsigned int            c_xmit_atomic_sent;
         unsigned int            c_xmit_rdma_sent;
+        unsigned int            c_xmit_data_sent;
 
         spinlock_t              c_lock;         /* protect msg queues */
         u64                     c_next_tx_seq;
@@ -116,11 +117,10 @@ struct rds_connection {
         struct delayed_work     c_conn_w;
         struct work_struct      c_down_w;
         struct mutex            c_cm_lock;      /* protect conn state & cm */
+        wait_queue_head_t       c_waitq;
 
         struct list_head        c_map_item;
         unsigned long           c_map_queued;
-        unsigned long           c_map_offset;
-        unsigned long           c_map_bytes;
 
         unsigned int            c_unacked_packets;
         unsigned int            c_unacked_bytes;
@@ -206,6 +206,48 @@ struct rds_incoming {
         rds_rdma_cookie_t       i_rdma_cookie;
 };
 
+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
+
+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;
+}
+
+/* atomic operation types */
+#define RDS_ATOMIC_TYPE_CSWP            0
+#define RDS_ATOMIC_TYPE_FADD            1
+
 /*
  * m_sock_item and m_conn_item are on lists that are serialized under
  * conn->c_lock.  m_sock_item has additional meaning in that once it is empty
@@ -258,13 +300,71 @@ struct rds_message {
          *   -> rs->rs_lock
          */
         spinlock_t              m_rs_lock;
+        wait_queue_head_t       m_flush_wait;
+
         struct rds_sock         *m_rs;
-        struct rds_rdma_op      *m_rdma_op;
+
+        /* cookie to send to remote, in rds header */
         rds_rdma_cookie_t       m_rdma_cookie;
-        struct rds_mr           *m_rdma_mr;
-        unsigned int            m_nents;
-        unsigned int            m_count;
-        struct scatterlist      m_sg[0];
+
+        unsigned int            m_used_sgs;
+        unsigned int            m_total_sgs;
+
+        void                    *m_final_op;
+
+        struct {
+                struct rm_atomic_op {
+                        int                     op_type;
+                        union {
+                                struct {
+                                        uint64_t        compare;
+                                        uint64_t        swap;
+                                        uint64_t        compare_mask;
+                                        uint64_t        swap_mask;
+                                } op_m_cswp;
+                                struct {
+                                        uint64_t        add;
+                                        uint64_t        nocarry_mask;
+                                } op_m_fadd;
+                        };
+
+                        u32                     op_rkey;
+                        u64                     op_remote_addr;
+                        unsigned int            op_notify:1;
+                        unsigned int            op_recverr:1;
+                        unsigned int            op_mapped:1;
+                        unsigned int            op_silent:1;
+                        unsigned int            op_active:1;
+                        struct scatterlist      *op_sg;
+                        struct rds_notifier     *op_notifier;
+
+                        struct rds_mr           *op_rdma_mr;
+                } atomic;
+                struct rm_rdma_op {
+                        u32                     op_rkey;
+                        u64                     op_remote_addr;
+                        unsigned int            op_write:1;
+                        unsigned int            op_fence:1;
+                        unsigned int            op_notify:1;
+                        unsigned int            op_recverr:1;
+                        unsigned int            op_mapped:1;
+                        unsigned int            op_silent:1;
+                        unsigned int            op_active:1;
+                        unsigned int            op_bytes;
+                        unsigned int            op_nents;
+                        unsigned int            op_count;
+                        struct scatterlist      *op_sg;
+                        struct rds_notifier     *op_notifier;
+
+                        struct rds_mr           *op_rdma_mr;
+                } rdma;
+                struct rm_data_op {
+                        unsigned int            op_active:1;
+                        unsigned int            op_nents;
+                        unsigned int            op_count;
+                        struct scatterlist      *op_sg;
+                } data;
+        };
 };
 
 /*
@@ -305,10 +405,6 @@ struct rds_notifier {
  *                 transport is responsible for other serialization, including
  *                 rds_recv_incoming().  This is called in process context but
  *                 should try hard not to block.
- *
- * @xmit_cong_map: This asks the transport to send the local bitmap down the
- *                 given connection.  XXX get a better story about the bitmap
- *                 flag and header.
  */
 
 #define RDS_TRANS_IB    0
@@ -332,13 +428,11 @@ struct rds_transport {
         void (*xmit_complete)(struct rds_connection *conn);
         int (*xmit)(struct rds_connection *conn, struct rds_message *rm,
                     unsigned int hdr_off, unsigned int sg, unsigned int off);
-        int (*xmit_cong_map)(struct rds_connection *conn,
-                             struct rds_cong_map *map, unsigned long offset);
-        int (*xmit_rdma)(struct rds_connection *conn, struct rds_rdma_op *op);
+        int (*xmit_rdma)(struct rds_connection *conn, struct rm_rdma_op *op);
+        int (*xmit_atomic)(struct rds_connection *conn, struct rm_atomic_op *op);
         int (*recv)(struct rds_connection *conn);
         int (*inc_copy_to_user)(struct rds_incoming *inc, struct iovec *iov,
                                 size_t size);
-        void (*inc_purge)(struct rds_incoming *inc);
         void (*inc_free)(struct rds_incoming *inc);
 
         int (*cm_handle_connect)(struct rdma_cm_id *cm_id,
@@ -367,17 +461,11 @@ struct rds_sock {
          * bound_addr used for both incoming and outgoing, no INADDR_ANY
          * support.
          */
-        struct rb_node          rs_bound_node;
+        struct hlist_node       rs_bound_node;
         __be32                  rs_bound_addr;
         __be32                  rs_conn_addr;
         __be16                  rs_bound_port;
         __be16                  rs_conn_port;
-
-        /*
-         * This is only used to communicate the transport between bind and
-         * initiating connections.  All other trans use is referenced through
-         * the connection.
-         */
         struct rds_transport    *rs_transport;
 
         /*
@@ -466,8 +554,8 @@ struct rds_statistics {
         uint64_t        s_recv_ping;
         uint64_t        s_send_queue_empty;
         uint64_t        s_send_queue_full;
-        uint64_t        s_send_sem_contention;
-        uint64_t        s_send_sem_queue_raced;
+        uint64_t        s_send_lock_contention;
+        uint64_t        s_send_lock_queue_raced;
         uint64_t        s_send_immediate_retry;
         uint64_t        s_send_delayed_retry;
         uint64_t        s_send_drop_acked;
@@ -487,6 +575,7 @@ struct rds_statistics {
 };
 
 /* af_rds.c */
+char *rds_str_array(char **array, size_t elements, size_t index);
 void rds_sock_addref(struct rds_sock *rs);
 void rds_sock_put(struct rds_sock *rs);
 void rds_wake_sk_sleep(struct rds_sock *rs);
@@ -521,15 +610,16 @@ void rds_cong_exit(void);
 struct rds_message *rds_cong_update_alloc(struct rds_connection *conn);
 
 /* conn.c */
-int __init rds_conn_init(void);
+int rds_conn_init(void);
 void rds_conn_exit(void);
 struct rds_connection *rds_conn_create(__be32 laddr, __be32 faddr,
                                        struct rds_transport *trans, gfp_t gfp);
 struct rds_connection *rds_conn_create_outgoing(__be32 laddr, __be32 faddr,
                                struct rds_transport *trans, gfp_t gfp);
+void rds_conn_shutdown(struct rds_connection *conn);
 void rds_conn_destroy(struct rds_connection *conn);
-void rds_conn_reset(struct rds_connection *conn);
 void rds_conn_drop(struct rds_connection *conn);
+void rds_conn_connect_if_down(struct rds_connection *conn);
 void rds_for_each_conn_info(struct socket *sock, unsigned int len,
                           struct rds_info_iterator *iter,
                           struct rds_info_lengths *lens,
@@ -566,7 +656,8 @@ rds_conn_connecting(struct rds_connection *conn)
 
 /* message.c */
 struct rds_message *rds_message_alloc(unsigned int nents, gfp_t gfp);
-struct rds_message *rds_message_copy_from_user(struct iovec *first_iov,
+struct scatterlist *rds_message_alloc_sgs(struct rds_message *rm, int nents);
+int rds_message_copy_from_user(struct rds_message *rm, struct iovec *first_iov,
                                                size_t total_len);
 struct rds_message *rds_message_map_pages(unsigned long *page_addrs, unsigned int total_len);
 void rds_message_populate_header(struct rds_header *hdr, __be16 sport,
@@ -575,12 +666,9 @@ int rds_message_add_extension(struct rds_header *hdr,
                               unsigned int type, const void *data, unsigned int len);
 int rds_message_next_extension(struct rds_header *hdr,
                                unsigned int *pos, void *buf, unsigned int *buflen);
-int rds_message_add_version_extension(struct rds_header *hdr, unsigned int version);
-int rds_message_get_version_extension(struct rds_header *hdr, unsigned int *version);
 int rds_message_add_rdma_dest_extension(struct rds_header *hdr, u32 r_key, u32 offset);
 int rds_message_inc_copy_to_user(struct rds_incoming *inc,
                                  struct iovec *first_iov, size_t size);
-void rds_message_inc_purge(struct rds_incoming *inc);
 void rds_message_inc_free(struct rds_incoming *inc);
 void rds_message_addref(struct rds_message *rm);
 void rds_message_put(struct rds_message *rm);
@@ -614,7 +702,6 @@ void rds_page_exit(void);
 /* recv.c */
 void rds_inc_init(struct rds_incoming *inc, struct rds_connection *conn,
                   __be32 saddr);
-void rds_inc_addref(struct rds_incoming *inc);
 void rds_inc_put(struct rds_incoming *inc);
 void rds_recv_incoming(struct rds_connection *conn, __be32 saddr, __be32 daddr,
                        struct rds_incoming *inc, gfp_t gfp, enum km_type km);
@@ -636,14 +723,38 @@ void rds_send_drop_to(struct rds_sock *rs, struct sockaddr_in *dest);
 typedef int (*is_acked_func)(struct rds_message *rm, uint64_t ack);
 void rds_send_drop_acked(struct rds_connection *conn, u64 ack,
                          is_acked_func is_acked);
-int rds_send_acked_before(struct rds_connection *conn, u64 seq);
-void rds_send_remove_from_sock(struct list_head *messages, int status);
 int rds_send_pong(struct rds_connection *conn, __be16 dport);
 struct rds_message *rds_send_get_message(struct rds_connection *,
-                                         struct rds_rdma_op *);
+                                         struct rm_rdma_op *);
 
 /* rdma.c */
 void rds_rdma_unuse(struct rds_sock *rs, u32 r_key, int force);
+int rds_get_mr(struct rds_sock *rs, char __user *optval, int optlen);
+int rds_get_mr_for_dest(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_rdma_extra_size(struct rds_rdma_args *args);
+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 rm_rdma_op *ro);
+void rds_atomic_free_op(struct rm_atomic_op *ao);
+void rds_rdma_send_complete(struct rds_message *rm, int wc_status);
+void rds_atomic_send_complete(struct rds_message *rm, int wc_status);
+int rds_cmsg_atomic(struct rds_sock *rs, struct rds_message *rm,
+                    struct cmsghdr *cmsg);
+
+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);
+}
 
 /* stats.c */
 DECLARE_PER_CPU_SHARED_ALIGNED(struct rds_statistics, rds_stats);
@@ -657,14 +768,14 @@ DECLARE_PER_CPU_SHARED_ALIGNED(struct rds_statistics, rds_stats);
         put_cpu();                                      \
 } while (0)
 #define rds_stats_add(member, count) rds_stats_add_which(rds_stats, member, count)
-int __init rds_stats_init(void);
+int rds_stats_init(void);
 void rds_stats_exit(void);
 void rds_stats_info_copy(struct rds_info_iterator *iter,
                          uint64_t *values, const char *const *names,
                          size_t nr);
 
 /* sysctl.c */
-int __init rds_sysctl_init(void);
+int rds_sysctl_init(void);
 void rds_sysctl_exit(void);
 extern unsigned long rds_sysctl_sndbuf_min;
 extern unsigned long rds_sysctl_sndbuf_default;
@@ -678,9 +789,10 @@ extern unsigned long rds_sysctl_trace_flags;
 extern unsigned int  rds_sysctl_trace_level;
 
 /* threads.c */
-int __init rds_threads_init(void);
+int rds_threads_init(void);
 void rds_threads_exit(void);
 extern struct workqueue_struct *rds_wq;
+void rds_queue_reconnect(struct rds_connection *conn);
 void rds_connect_worker(struct work_struct *);
 void rds_shutdown_worker(struct work_struct *);
 void rds_send_worker(struct work_struct *);
@@ -691,9 +803,10 @@ void rds_connect_complete(struct rds_connection *conn);
 int rds_trans_register(struct rds_transport *trans);
 void rds_trans_unregister(struct rds_transport *trans);
 struct rds_transport *rds_trans_get_preferred(__be32 addr);
+void rds_trans_put(struct rds_transport *trans);
 unsigned int rds_trans_stats_info_copy(struct rds_info_iterator *iter,
                                        unsigned int avail);
-int __init rds_trans_init(void);
+int rds_trans_init(void);
 void rds_trans_exit(void);
 
 #endif