3  * Shared Memory Communications over RDMA (SMC-R) and RoCE
19 #include "smc.h"
53 static int smc_rx_update_consumer(struct smc_sock *smc,  in smc_rx_update_consumer()  argument
56 	struct smc_connection *conn = &smc->conn;  in smc_rx_update_consumer()
57 	struct sock *sk = &smc->sk;  in smc_rx_update_consumer()
94 static void smc_rx_update_cons(struct smc_sock *smc, size_t len)  in smc_rx_update_cons()  argument
96 	struct smc_connection *conn = &smc->conn;  in smc_rx_update_cons()
100 	smc_rx_update_consumer(smc, cons, len);  in smc_rx_update_cons()
104 	struct smc_sock *smc;  member
112 	struct smc_sock *smc = priv->smc;  in smc_rx_pipe_buf_release()  local
114 	struct sock *sk = &smc->sk;  in smc_rx_pipe_buf_release()
120 	conn = &smc->conn;  in smc_rx_pipe_buf_release()
122 	smc_rx_update_cons(smc, priv->len);  in smc_rx_pipe_buf_release()
144 			 struct smc_sock *smc)  in smc_rx_splice()  argument
155 	priv->smc = smc;  in smc_rx_splice()
156 	partial.offset = src - (char *)smc->conn.rmb_desc->cpu_addr;  in smc_rx_splice()
162 	spd.pages = &smc->conn.rmb_desc->pages;  in smc_rx_splice()
169 		sock_hold(&smc->sk);  in smc_rx_splice()
170 		get_page(smc->conn.rmb_desc->pages);  in smc_rx_splice()
171 		atomic_add(bytes, &smc->conn.splice_pending);  in smc_rx_splice()
184  *   @smc    smc socket
191 int smc_rx_wait(struct smc_sock *smc, long *timeo,  in smc_rx_wait()  argument
195 	struct smc_connection *conn = &smc->conn;  in smc_rx_wait()
198 	struct sock *sk = &smc->sk;  in smc_rx_wait()
217 static int smc_rx_recv_urg(struct smc_sock *smc, struct msghdr *msg, int len,  in smc_rx_recv_urg()  argument
220 	struct smc_connection *conn = &smc->conn;  in smc_rx_recv_urg()
222 	struct sock *sk = &smc->sk;  in smc_rx_recv_urg()
232 			smc->conn.urg_state = SMC_URG_READ;  in smc_rx_recv_urg()
246 				smc_rx_update_consumer(smc, cons, 0);  in smc_rx_recv_urg()
260 static bool smc_rx_recvmsg_data_available(struct smc_sock *smc)  in smc_rx_recvmsg_data_available()  argument
262 	struct smc_connection *conn = &smc->conn;  in smc_rx_recvmsg_data_available()
268 		smc_rx_update_cons(smc, 0);  in smc_rx_recvmsg_data_available()
279 int smc_rx_recvmsg(struct smc_sock *smc, struct msghdr *msg,  in smc_rx_recvmsg()  argument
284 	struct smc_connection *conn = &smc->conn;  in smc_rx_recvmsg()
298 	sk = &smc->sk;  in smc_rx_recvmsg()
302 		return smc_rx_recv_urg(smc, msg, len, flags);  in smc_rx_recvmsg()
316 		if (smc_rx_recvmsg_data_available(smc))  in smc_rx_recvmsg()
323 			if (smc_rx_recvmsg_data_available(smc))  in smc_rx_recvmsg()
358 			smc_rx_wait(smc, &timeo, smc_rx_data_available);  in smc_rx_recvmsg()
372 			smc_rx_wait(smc, &timeo, func);  in smc_rx_recvmsg()
381 		    sock_flag(&smc->sk, SOCK_URGINLINE) &&  in smc_rx_recvmsg()
402 							smc);  in smc_rx_recvmsg()
430 			if (msg && smc_rx_update_consumer(smc, cons, copylen))  in smc_rx_recvmsg()
439 void smc_rx_init(struct smc_sock *smc)  in smc_rx_init()  argument
441 	smc->sk.sk_data_ready = smc_rx_wake_up;  in smc_rx_init()
442 	atomic_set(&smc->conn.splice_pending, 0);  in smc_rx_init()
443 	smc->conn.urg_state = SMC_URG_READ;  in smc_rx_init()