46 	if (atomic_read(&smc->conn.sndbuf_space) && sock) {  in smc_tx_write_space()
76 	struct smc_connection *conn = &smc->conn;  in smc_tx_wait()  local
90 		    conn->local_tx_ctrl.conn_state_flags.peer_done_writing) {  in smc_tx_wait()
94 		if (smc_cdc_rxed_any_close(conn)) {  in smc_tx_wait()
109 		if (atomic_read(&conn->sndbuf_space) && !conn->urg_tx_pend)  in smc_tx_wait()
115 			      smc_cdc_rxed_any_close(conn) ||  in smc_tx_wait()
116 			      (atomic_read(&conn->sndbuf_space) &&  in smc_tx_wait()
117 			       !conn->urg_tx_pend),  in smc_tx_wait()
138 	struct smc_connection *conn = &smc->conn;  in smc_tx_sendmsg()  local
159 		    conn->local_tx_ctrl.conn_state_flags.peer_conn_abort)  in smc_tx_sendmsg()
161 		if (smc_cdc_rxed_any_close(conn))  in smc_tx_sendmsg()
165 			conn->local_tx_ctrl.prod_flags.urg_data_pending = 1;  in smc_tx_sendmsg()
167 		if (!atomic_read(&conn->sndbuf_space) || conn->urg_tx_pend) {  in smc_tx_sendmsg()
179 		writespace = atomic_read(&conn->sndbuf_space);  in smc_tx_sendmsg()
183 		sndbuf_base = conn->sndbuf_desc->cpu_addr;  in smc_tx_sendmsg()
184 		smc_curs_copy(&prep, &conn->tx_curs_prep, conn);  in smc_tx_sendmsg()
188 		chunk_len = min_t(size_t, copylen, conn->sndbuf_desc->len -  in smc_tx_sendmsg()
192 		smc_sndbuf_sync_sg_for_cpu(conn);  in smc_tx_sendmsg()
197 				smc_sndbuf_sync_sg_for_device(conn);  in smc_tx_sendmsg()
212 		smc_sndbuf_sync_sg_for_device(conn);  in smc_tx_sendmsg()
214 		smc_curs_add(conn->sndbuf_desc->len, &prep, copylen);  in smc_tx_sendmsg()
215 		smc_curs_copy(&conn->tx_curs_prep, &prep, conn);  in smc_tx_sendmsg()
218 		atomic_sub(copylen, &conn->sndbuf_space);  in smc_tx_sendmsg()
225 			conn->urg_tx_pend = true;  in smc_tx_sendmsg()
227 		    (atomic_read(&conn->sndbuf_space) >  in smc_tx_sendmsg()
228 						(conn->sndbuf_desc->len >> 1)))  in smc_tx_sendmsg()
232 			schedule_delayed_work(&conn->tx_work,  in smc_tx_sendmsg()
235 			smc_tx_sndbuf_nonempty(conn);  in smc_tx_sendmsg()
251 int smcd_tx_ism_write(struct smc_connection *conn, void *data, size_t len,  in smcd_tx_ism_write()  argument
258 	pos.token = conn->peer_token;  in smcd_tx_ism_write()
259 	pos.index = conn->peer_rmbe_idx;  in smcd_tx_ism_write()
260 	pos.offset = conn->tx_off + offset;  in smcd_tx_ism_write()
262 	rc = smc_ism_write(conn->lgr->smcd, &pos, data, len);  in smcd_tx_ism_write()
264 		conn->local_tx_ctrl.conn_state_flags.peer_conn_abort = 1;  in smcd_tx_ism_write()
269 static int smc_tx_rdma_write(struct smc_connection *conn, int peer_rmbe_offset,  in smc_tx_rdma_write()  argument
272 	struct smc_link_group *lgr = conn->lgr;  in smc_tx_rdma_write()
284 		lgr->rtokens[conn->rtoken_idx][SMC_SINGLE_LINK].dma_addr +  in smc_tx_rdma_write()
286 		conn->tx_off +  in smc_tx_rdma_write()
289 	rdma_wr.rkey = lgr->rtokens[conn->rtoken_idx][SMC_SINGLE_LINK].rkey;  in smc_tx_rdma_write()
292 		conn->local_tx_ctrl.conn_state_flags.peer_conn_abort = 1;  in smc_tx_rdma_write()
299 static inline void smc_tx_advance_cursors(struct smc_connection *conn,  in smc_tx_advance_cursors()  argument
304 	smc_curs_add(conn->peer_rmbe_size, prod, len);  in smc_tx_advance_cursors()
308 	atomic_sub(len, &conn->peer_rmbe_space);  in smc_tx_advance_cursors()
311 	smc_curs_add(conn->sndbuf_desc->len, sent, len);  in smc_tx_advance_cursors()
315 static int smcr_tx_rdma_writes(struct smc_connection *conn, size_t len,  in smcr_tx_rdma_writes()  argument
320 		sg_dma_address(conn->sndbuf_desc->sgt[SMC_SINGLE_LINK].sgl);  in smcr_tx_rdma_writes()
321 	struct smc_link *link = &conn->lgr->lnk[SMC_SINGLE_LINK];  in smcr_tx_rdma_writes()
338 			if (src_off >= conn->sndbuf_desc->len)  in smcr_tx_rdma_writes()
339 				src_off -= conn->sndbuf_desc->len;  in smcr_tx_rdma_writes()
347 		rc = smc_tx_rdma_write(conn, dst_off, num_sges, sges);  in smcr_tx_rdma_writes()
356 		src_len = min_t(int, dst_len, conn->sndbuf_desc->len -  in smcr_tx_rdma_writes()
364 static int smcd_tx_rdma_writes(struct smc_connection *conn, size_t len,  in smcd_tx_rdma_writes()  argument
374 			void *data = conn->sndbuf_desc->cpu_addr + src_off;  in smcd_tx_rdma_writes()
376 			rc = smcd_tx_ism_write(conn, data, src_len, dst_off +  in smcd_tx_rdma_writes()
382 			if (src_off >= conn->sndbuf_desc->len)  in smcd_tx_rdma_writes()
383 				src_off -= conn->sndbuf_desc->len;  in smcd_tx_rdma_writes()
397 		src_len = min_t(int, dst_len, conn->sndbuf_desc->len - src_off);  in smcd_tx_rdma_writes()
406 static int smc_tx_rdma_writes(struct smc_connection *conn)  in smc_tx_rdma_writes()  argument
415 	smc_curs_copy(&sent, &conn->tx_curs_sent, conn);  in smc_tx_rdma_writes()
416 	smc_curs_copy(&prep, &conn->tx_curs_prep, conn);  in smc_tx_rdma_writes()
418 	to_send = smc_curs_diff(conn->sndbuf_desc->len, &sent, &prep);  in smc_tx_rdma_writes()
424 	rmbespace = atomic_read(&conn->peer_rmbe_space);  in smc_tx_rdma_writes()
427 	smc_curs_copy(&prod, &conn->local_tx_ctrl.prod, conn);  in smc_tx_rdma_writes()
428 	smc_curs_copy(&cons, &conn->local_rx_ctrl.cons, conn);  in smc_tx_rdma_writes()
431 	pflags = &conn->local_tx_ctrl.prod_flags;  in smc_tx_rdma_writes()
445 				conn->peer_rmbe_size - prod.count, len);  in smc_tx_rdma_writes()
454 	if (sent.count + dst_len <= conn->sndbuf_desc->len) {  in smc_tx_rdma_writes()
459 		src_len = conn->sndbuf_desc->len - sent.count;  in smc_tx_rdma_writes()
462 	if (conn->lgr->is_smcd)  in smc_tx_rdma_writes()
463 		rc = smcd_tx_rdma_writes(conn, len, sent.count, src_len,  in smc_tx_rdma_writes()
466 		rc = smcr_tx_rdma_writes(conn, len, sent.count, src_len,  in smc_tx_rdma_writes()
471 	if (conn->urg_tx_pend && len == to_send)  in smc_tx_rdma_writes()
473 	smc_tx_advance_cursors(conn, &prod, &sent, len);  in smc_tx_rdma_writes()
475 	smc_curs_copy(&conn->local_tx_ctrl.prod, &prod, conn);  in smc_tx_rdma_writes()
477 	smc_curs_copy(&conn->tx_curs_sent, &sent, conn);/* src: local sndbuf */  in smc_tx_rdma_writes()
485 static int smcr_tx_sndbuf_nonempty(struct smc_connection *conn)  in smcr_tx_sndbuf_nonempty()  argument
492 	spin_lock_bh(&conn->send_lock);  in smcr_tx_sndbuf_nonempty()
493 	rc = smc_cdc_get_free_slot(conn, &wr_buf, &pend);  in smcr_tx_sndbuf_nonempty()
497 				container_of(conn, struct smc_sock, conn);  in smcr_tx_sndbuf_nonempty()
504 			if (conn->alert_token_local) /* connection healthy */  in smcr_tx_sndbuf_nonempty()
505 				mod_delayed_work(system_wq, &conn->tx_work,  in smcr_tx_sndbuf_nonempty()
511 	if (!conn->local_tx_ctrl.prod_flags.urg_data_present) {  in smcr_tx_sndbuf_nonempty()
512 		rc = smc_tx_rdma_writes(conn);  in smcr_tx_sndbuf_nonempty()
514 			smc_wr_tx_put_slot(&conn->lgr->lnk[SMC_SINGLE_LINK],  in smcr_tx_sndbuf_nonempty()
520 	rc = smc_cdc_msg_send(conn, wr_buf, pend);  in smcr_tx_sndbuf_nonempty()
521 	pflags = &conn->local_tx_ctrl.prod_flags;  in smcr_tx_sndbuf_nonempty()
528 	spin_unlock_bh(&conn->send_lock);  in smcr_tx_sndbuf_nonempty()
532 static int smcd_tx_sndbuf_nonempty(struct smc_connection *conn)  in smcd_tx_sndbuf_nonempty()  argument
534 	struct smc_cdc_producer_flags *pflags = &conn->local_tx_ctrl.prod_flags;  in smcd_tx_sndbuf_nonempty()
537 	spin_lock_bh(&conn->send_lock);  in smcd_tx_sndbuf_nonempty()
539 		rc = smc_tx_rdma_writes(conn);  in smcd_tx_sndbuf_nonempty()
541 		rc = smcd_cdc_msg_send(conn);  in smcd_tx_sndbuf_nonempty()
547 	spin_unlock_bh(&conn->send_lock);  in smcd_tx_sndbuf_nonempty()
551 int smc_tx_sndbuf_nonempty(struct smc_connection *conn)  in smc_tx_sndbuf_nonempty()  argument
555 	if (conn->lgr->is_smcd)  in smc_tx_sndbuf_nonempty()
556 		rc = smcd_tx_sndbuf_nonempty(conn);  in smc_tx_sndbuf_nonempty()
558 		rc = smcr_tx_sndbuf_nonempty(conn);  in smc_tx_sndbuf_nonempty()
568 	struct smc_connection *conn = container_of(to_delayed_work(work),  in smc_tx_work()  local
571 	struct smc_sock *smc = container_of(conn, struct smc_sock, conn);  in smc_tx_work()
576 	    !conn->alert_token_local ||  in smc_tx_work()
577 	    conn->local_rx_ctrl.conn_state_flags.peer_conn_abort)  in smc_tx_work()
580 	rc = smc_tx_sndbuf_nonempty(conn);  in smc_tx_work()
581 	if (!rc && conn->local_rx_ctrl.prod_flags.write_blocked &&  in smc_tx_work()
582 	    !atomic_read(&conn->bytes_to_rcv))  in smc_tx_work()
583 		conn->local_rx_ctrl.prod_flags.write_blocked = 0;  in smc_tx_work()
589 void smc_tx_consumer_update(struct smc_connection *conn, bool force)  in smc_tx_consumer_update()  argument
592 	int sender_free = conn->rmb_desc->len;  in smc_tx_consumer_update()
595 	smc_curs_copy(&cons, &conn->local_tx_ctrl.cons, conn);  in smc_tx_consumer_update()
596 	smc_curs_copy(&cfed, &conn->rx_curs_confirmed, conn);  in smc_tx_consumer_update()
597 	to_confirm = smc_curs_diff(conn->rmb_desc->len, &cfed, &cons);  in smc_tx_consumer_update()
598 	if (to_confirm > conn->rmbe_update_limit) {  in smc_tx_consumer_update()
599 		smc_curs_copy(&prod, &conn->local_rx_ctrl.prod, conn);  in smc_tx_consumer_update()
600 		sender_free = conn->rmb_desc->len -  in smc_tx_consumer_update()
601 			      smc_curs_diff(conn->rmb_desc->len, &prod, &cfed);  in smc_tx_consumer_update()
604 	if (conn->local_rx_ctrl.prod_flags.cons_curs_upd_req ||  in smc_tx_consumer_update()
606 	    ((to_confirm > conn->rmbe_update_limit) &&  in smc_tx_consumer_update()
607 	     ((sender_free <= (conn->rmb_desc->len / 2)) ||  in smc_tx_consumer_update()
608 	      conn->local_rx_ctrl.prod_flags.write_blocked))) {  in smc_tx_consumer_update()
609 		if ((smc_cdc_get_slot_and_msg_send(conn) < 0) &&  in smc_tx_consumer_update()
610 		    conn->alert_token_local) { /* connection healthy */  in smc_tx_consumer_update()
611 			schedule_delayed_work(&conn->tx_work,  in smc_tx_consumer_update()
615 		smc_curs_copy(&conn->rx_curs_confirmed,  in smc_tx_consumer_update()
616 			      &conn->local_tx_ctrl.cons, conn);  in smc_tx_consumer_update()
617 		conn->local_rx_ctrl.prod_flags.cons_curs_upd_req = 0;  in smc_tx_consumer_update()
619 	if (conn->local_rx_ctrl.prod_flags.write_blocked &&  in smc_tx_consumer_update()
620 	    !atomic_read(&conn->bytes_to_rcv))  in smc_tx_consumer_update()
621 		conn->local_rx_ctrl.prod_flags.write_blocked = 0;  in smc_tx_consumer_update()