3  * Shared Memory Communications over RDMA (SMC-R) and RoCE
19 #include "smc.h"
54 static int smc_rx_update_consumer(struct smc_sock *smc,  in smc_rx_update_consumer()  argument
57 	struct smc_connection *conn = &smc->conn;  in smc_rx_update_consumer()
58 	struct sock *sk = &smc->sk;  in smc_rx_update_consumer()
95 static void smc_rx_update_cons(struct smc_sock *smc, size_t len)  in smc_rx_update_cons()  argument
97 	struct smc_connection *conn = &smc->conn;  in smc_rx_update_cons()
101 	smc_rx_update_consumer(smc, cons, len);  in smc_rx_update_cons()
105 	struct smc_sock *smc;  member
113 	struct smc_sock *smc = priv->smc;  in smc_rx_pipe_buf_release()  local
115 	struct sock *sk = &smc->sk;  in smc_rx_pipe_buf_release()
121 	conn = &smc->conn;  in smc_rx_pipe_buf_release()
123 	smc_rx_update_cons(smc, priv->len);  in smc_rx_pipe_buf_release()
145 			 struct smc_sock *smc)  in smc_rx_splice()  argument
156 	priv->smc = smc;  in smc_rx_splice()
157 	partial.offset = src - (char *)smc->conn.rmb_desc->cpu_addr;  in smc_rx_splice()
163 	spd.pages = &smc->conn.rmb_desc->pages;  in smc_rx_splice()
170 		sock_hold(&smc->sk);  in smc_rx_splice()
171 		get_page(smc->conn.rmb_desc->pages);  in smc_rx_splice()
172 		atomic_add(bytes, &smc->conn.splice_pending);  in smc_rx_splice()
185  *   @smc    smc socket
192 int smc_rx_wait(struct smc_sock *smc, long *timeo,  in smc_rx_wait()  argument
196 	struct smc_connection *conn = &smc->conn;  in smc_rx_wait()
199 	struct sock *sk = &smc->sk;  in smc_rx_wait()
218 static int smc_rx_recv_urg(struct smc_sock *smc, struct msghdr *msg, int len,  in smc_rx_recv_urg()  argument
221 	struct smc_connection *conn = &smc->conn;  in smc_rx_recv_urg()
223 	struct sock *sk = &smc->sk;  in smc_rx_recv_urg()
231 	SMC_STAT_INC(smc, urg_data_cnt);  in smc_rx_recv_urg()
234 			smc->conn.urg_state = SMC_URG_READ;  in smc_rx_recv_urg()
248 				smc_rx_update_consumer(smc, cons, 0);  in smc_rx_recv_urg()
262 static bool smc_rx_recvmsg_data_available(struct smc_sock *smc)  in smc_rx_recvmsg_data_available()  argument
264 	struct smc_connection *conn = &smc->conn;  in smc_rx_recvmsg_data_available()
270 		smc_rx_update_cons(smc, 0);  in smc_rx_recvmsg_data_available()
281 int smc_rx_recvmsg(struct smc_sock *smc, struct msghdr *msg,  in smc_rx_recvmsg()  argument
286 	struct smc_connection *conn = &smc->conn;  in smc_rx_recvmsg()
300 	sk = &smc->sk;  in smc_rx_recvmsg()
304 		return smc_rx_recv_urg(smc, msg, len, flags);  in smc_rx_recvmsg()
310 		SMC_STAT_RMB_RX_FULL(smc, !conn->lnk);  in smc_rx_recvmsg()
313 		SMC_STAT_RMB_RX_SIZE_SMALL(smc, !conn->lnk);  in smc_rx_recvmsg()
324 		if (smc_rx_recvmsg_data_available(smc))  in smc_rx_recvmsg()
331 			if (smc_rx_recvmsg_data_available(smc))  in smc_rx_recvmsg()
366 			smc_rx_wait(smc, &timeo, smc_rx_data_available);  in smc_rx_recvmsg()
380 			smc_rx_wait(smc, &timeo, func);  in smc_rx_recvmsg()
389 		    sock_flag(&smc->sk, SOCK_URGINLINE) &&  in smc_rx_recvmsg()
410 							smc);  in smc_rx_recvmsg()
438 			if (msg && smc_rx_update_consumer(smc, cons, copylen))  in smc_rx_recvmsg()
447 void smc_rx_init(struct smc_sock *smc)  in smc_rx_init()  argument
449 	smc->sk.sk_data_ready = smc_rx_wake_up;  in smc_rx_init()
450 	atomic_set(&smc->conn.splice_pending, 0);  in smc_rx_init()
451 	smc->conn.urg_state = SMC_URG_READ;  in smc_rx_init()