47 	if (atomic_read(&smc->conn.sndbuf_space) && sock) {  in smc_tx_write_space()
77 	struct smc_connection *conn = &smc->conn;  in smc_tx_wait()  local
89 		    conn->local_tx_ctrl.conn_state_flags.peer_done_writing) {  in smc_tx_wait()
93 		if (smc_cdc_rxed_any_close(conn)) {  in smc_tx_wait()
108 		if (atomic_read(&conn->sndbuf_space) && !conn->urg_tx_pend)  in smc_tx_wait()
114 			      smc_cdc_rxed_any_close(conn) ||  in smc_tx_wait()
115 			      (atomic_read(&conn->sndbuf_space) &&  in smc_tx_wait()
116 			       !conn->urg_tx_pend),  in smc_tx_wait()
137 	struct smc_connection *conn = &smc->conn;  in smc_tx_sendmsg()  local
158 		    conn->local_tx_ctrl.conn_state_flags.peer_conn_abort)  in smc_tx_sendmsg()
160 		if (smc_cdc_rxed_any_close(conn))  in smc_tx_sendmsg()
164 			conn->local_tx_ctrl.prod_flags.urg_data_pending = 1;  in smc_tx_sendmsg()
166 		if (!atomic_read(&conn->sndbuf_space) || conn->urg_tx_pend) {  in smc_tx_sendmsg()
177 		writespace = atomic_read(&conn->sndbuf_space);  in smc_tx_sendmsg()
181 		sndbuf_base = conn->sndbuf_desc->cpu_addr;  in smc_tx_sendmsg()
182 		smc_curs_copy(&prep, &conn->tx_curs_prep, conn);  in smc_tx_sendmsg()
186 		chunk_len = min_t(size_t, copylen, conn->sndbuf_desc->len -  in smc_tx_sendmsg()
190 		smc_sndbuf_sync_sg_for_cpu(conn);  in smc_tx_sendmsg()
195 				smc_sndbuf_sync_sg_for_device(conn);  in smc_tx_sendmsg()
210 		smc_sndbuf_sync_sg_for_device(conn);  in smc_tx_sendmsg()
212 		smc_curs_add(conn->sndbuf_desc->len, &prep, copylen);  in smc_tx_sendmsg()
213 		smc_curs_copy(&conn->tx_curs_prep, &prep, conn);  in smc_tx_sendmsg()
216 		atomic_sub(copylen, &conn->sndbuf_space);  in smc_tx_sendmsg()
223 			conn->urg_tx_pend = true;  in smc_tx_sendmsg()
225 		    (atomic_read(&conn->sndbuf_space) >  in smc_tx_sendmsg()
226 						(conn->sndbuf_desc->len >> 1)))  in smc_tx_sendmsg()
230 			schedule_delayed_work(&conn->tx_work,  in smc_tx_sendmsg()
233 			smc_tx_sndbuf_nonempty(conn);  in smc_tx_sendmsg()
249 int smcd_tx_ism_write(struct smc_connection *conn, void *data, size_t len,  in smcd_tx_ism_write()  argument
256 	pos.token = conn->peer_token;  in smcd_tx_ism_write()
257 	pos.index = conn->peer_rmbe_idx;  in smcd_tx_ism_write()
258 	pos.offset = conn->tx_off + offset;  in smcd_tx_ism_write()
260 	rc = smc_ism_write(conn->lgr->smcd, &pos, data, len);  in smcd_tx_ism_write()
262 		conn->local_tx_ctrl.conn_state_flags.peer_conn_abort = 1;  in smcd_tx_ism_write()
267 static int smc_tx_rdma_write(struct smc_connection *conn, int peer_rmbe_offset,  in smc_tx_rdma_write()  argument
270 	struct smc_link_group *lgr = conn->lgr;  in smc_tx_rdma_write()
278 		lgr->rtokens[conn->rtoken_idx][SMC_SINGLE_LINK].dma_addr +  in smc_tx_rdma_write()
280 		conn->tx_off +  in smc_tx_rdma_write()
283 	rdma_wr->rkey = lgr->rtokens[conn->rtoken_idx][SMC_SINGLE_LINK].rkey;  in smc_tx_rdma_write()
286 		conn->local_tx_ctrl.conn_state_flags.peer_conn_abort = 1;  in smc_tx_rdma_write()
293 static inline void smc_tx_advance_cursors(struct smc_connection *conn,  in smc_tx_advance_cursors()  argument
298 	smc_curs_add(conn->peer_rmbe_size, prod, len);  in smc_tx_advance_cursors()
302 	atomic_sub(len, &conn->peer_rmbe_space);  in smc_tx_advance_cursors()
305 	smc_curs_add(conn->sndbuf_desc->len, sent, len);  in smc_tx_advance_cursors()
309 static int smcr_tx_rdma_writes(struct smc_connection *conn, size_t len,  in smcr_tx_rdma_writes()  argument
315 		sg_dma_address(conn->sndbuf_desc->sgt[SMC_SINGLE_LINK].sgl);  in smcr_tx_rdma_writes()
333 			if (src_off >= conn->sndbuf_desc->len)  in smcr_tx_rdma_writes()
334 				src_off -= conn->sndbuf_desc->len;  in smcr_tx_rdma_writes()
342 		rc = smc_tx_rdma_write(conn, dst_off, num_sges,  in smcr_tx_rdma_writes()
352 		src_len = min_t(int, dst_len, conn->sndbuf_desc->len -  in smcr_tx_rdma_writes()
360 static int smcd_tx_rdma_writes(struct smc_connection *conn, size_t len,  in smcd_tx_rdma_writes()  argument
370 			void *data = conn->sndbuf_desc->cpu_addr + src_off;  in smcd_tx_rdma_writes()
372 			rc = smcd_tx_ism_write(conn, data, src_len, dst_off +  in smcd_tx_rdma_writes()
378 			if (src_off >= conn->sndbuf_desc->len)  in smcd_tx_rdma_writes()
379 				src_off -= conn->sndbuf_desc->len;  in smcd_tx_rdma_writes()
393 		src_len = min_t(int, dst_len, conn->sndbuf_desc->len - src_off);  in smcd_tx_rdma_writes()
402 static int smc_tx_rdma_writes(struct smc_connection *conn,  in smc_tx_rdma_writes()  argument
412 	smc_curs_copy(&sent, &conn->tx_curs_sent, conn);  in smc_tx_rdma_writes()
413 	smc_curs_copy(&prep, &conn->tx_curs_prep, conn);  in smc_tx_rdma_writes()
415 	to_send = smc_curs_diff(conn->sndbuf_desc->len, &sent, &prep);  in smc_tx_rdma_writes()
421 	rmbespace = atomic_read(&conn->peer_rmbe_space);  in smc_tx_rdma_writes()
424 	smc_curs_copy(&prod, &conn->local_tx_ctrl.prod, conn);  in smc_tx_rdma_writes()
425 	smc_curs_copy(&cons, &conn->local_rx_ctrl.cons, conn);  in smc_tx_rdma_writes()
428 	pflags = &conn->local_tx_ctrl.prod_flags;  in smc_tx_rdma_writes()
442 				conn->peer_rmbe_size - prod.count, len);  in smc_tx_rdma_writes()
451 	if (sent.count + dst_len <= conn->sndbuf_desc->len) {  in smc_tx_rdma_writes()
456 		src_len = conn->sndbuf_desc->len - sent.count;  in smc_tx_rdma_writes()
459 	if (conn->lgr->is_smcd)  in smc_tx_rdma_writes()
460 		rc = smcd_tx_rdma_writes(conn, len, sent.count, src_len,  in smc_tx_rdma_writes()
463 		rc = smcr_tx_rdma_writes(conn, len, sent.count, src_len,  in smc_tx_rdma_writes()
468 	if (conn->urg_tx_pend && len == to_send)  in smc_tx_rdma_writes()
470 	smc_tx_advance_cursors(conn, &prod, &sent, len);  in smc_tx_rdma_writes()
472 	smc_curs_copy(&conn->local_tx_ctrl.prod, &prod, conn);  in smc_tx_rdma_writes()
474 	smc_curs_copy(&conn->tx_curs_sent, &sent, conn);/* src: local sndbuf */  in smc_tx_rdma_writes()
482 static int smcr_tx_sndbuf_nonempty(struct smc_connection *conn)  in smcr_tx_sndbuf_nonempty()  argument
484 	struct smc_cdc_producer_flags *pflags = &conn->local_tx_ctrl.prod_flags;  in smcr_tx_sndbuf_nonempty()
490 	rc = smc_cdc_get_free_slot(conn, &wr_buf, &wr_rdma_buf, &pend);  in smcr_tx_sndbuf_nonempty()
494 				container_of(conn, struct smc_sock, conn);  in smcr_tx_sndbuf_nonempty()
499 			if (conn->alert_token_local) /* connection healthy */  in smcr_tx_sndbuf_nonempty()
500 				mod_delayed_work(system_wq, &conn->tx_work,  in smcr_tx_sndbuf_nonempty()
506 	spin_lock_bh(&conn->send_lock);  in smcr_tx_sndbuf_nonempty()
508 		rc = smc_tx_rdma_writes(conn, wr_rdma_buf);  in smcr_tx_sndbuf_nonempty()
510 			smc_wr_tx_put_slot(&conn->lgr->lnk[SMC_SINGLE_LINK],  in smcr_tx_sndbuf_nonempty()
516 	rc = smc_cdc_msg_send(conn, wr_buf, pend);  in smcr_tx_sndbuf_nonempty()
523 	spin_unlock_bh(&conn->send_lock);  in smcr_tx_sndbuf_nonempty()
527 static int smcd_tx_sndbuf_nonempty(struct smc_connection *conn)  in smcd_tx_sndbuf_nonempty()  argument
529 	struct smc_cdc_producer_flags *pflags = &conn->local_tx_ctrl.prod_flags;  in smcd_tx_sndbuf_nonempty()
532 	spin_lock_bh(&conn->send_lock);  in smcd_tx_sndbuf_nonempty()
534 		rc = smc_tx_rdma_writes(conn, NULL);  in smcd_tx_sndbuf_nonempty()
536 		rc = smcd_cdc_msg_send(conn);  in smcd_tx_sndbuf_nonempty()
542 	spin_unlock_bh(&conn->send_lock);  in smcd_tx_sndbuf_nonempty()
546 int smc_tx_sndbuf_nonempty(struct smc_connection *conn)  in smc_tx_sndbuf_nonempty()  argument
550 	if (conn->lgr->is_smcd)  in smc_tx_sndbuf_nonempty()
551 		rc = smcd_tx_sndbuf_nonempty(conn);  in smc_tx_sndbuf_nonempty()
553 		rc = smcr_tx_sndbuf_nonempty(conn);  in smc_tx_sndbuf_nonempty()
557 		struct smc_sock *smc = container_of(conn, struct smc_sock,  in smc_tx_sndbuf_nonempty()
558 						    conn);  in smc_tx_sndbuf_nonempty()
569 	struct smc_connection *conn = container_of(to_delayed_work(work),  in smc_tx_work()  local
572 	struct smc_sock *smc = container_of(conn, struct smc_sock, conn);  in smc_tx_work()
577 	    !conn->alert_token_local ||  in smc_tx_work()
578 	    conn->local_rx_ctrl.conn_state_flags.peer_conn_abort)  in smc_tx_work()
581 	rc = smc_tx_sndbuf_nonempty(conn);  in smc_tx_work()
582 	if (!rc && conn->local_rx_ctrl.prod_flags.write_blocked &&  in smc_tx_work()
583 	    !atomic_read(&conn->bytes_to_rcv))  in smc_tx_work()
584 		conn->local_rx_ctrl.prod_flags.write_blocked = 0;  in smc_tx_work()
590 void smc_tx_consumer_update(struct smc_connection *conn, bool force)  in smc_tx_consumer_update()  argument
593 	int sender_free = conn->rmb_desc->len;  in smc_tx_consumer_update()
596 	smc_curs_copy(&cons, &conn->local_tx_ctrl.cons, conn);  in smc_tx_consumer_update()
597 	smc_curs_copy(&cfed, &conn->rx_curs_confirmed, conn);  in smc_tx_consumer_update()
598 	to_confirm = smc_curs_diff(conn->rmb_desc->len, &cfed, &cons);  in smc_tx_consumer_update()
599 	if (to_confirm > conn->rmbe_update_limit) {  in smc_tx_consumer_update()
600 		smc_curs_copy(&prod, &conn->local_rx_ctrl.prod, conn);  in smc_tx_consumer_update()
601 		sender_free = conn->rmb_desc->len -  in smc_tx_consumer_update()
602 			      smc_curs_diff_large(conn->rmb_desc->len,  in smc_tx_consumer_update()
606 	if (conn->local_rx_ctrl.prod_flags.cons_curs_upd_req ||  in smc_tx_consumer_update()
608 	    ((to_confirm > conn->rmbe_update_limit) &&  in smc_tx_consumer_update()
609 	     ((sender_free <= (conn->rmb_desc->len / 2)) ||  in smc_tx_consumer_update()
610 	      conn->local_rx_ctrl.prod_flags.write_blocked))) {  in smc_tx_consumer_update()
611 		if ((smc_cdc_get_slot_and_msg_send(conn) < 0) &&  in smc_tx_consumer_update()
612 		    conn->alert_token_local) { /* connection healthy */  in smc_tx_consumer_update()
613 			schedule_delayed_work(&conn->tx_work,  in smc_tx_consumer_update()
618 	if (conn->local_rx_ctrl.prod_flags.write_blocked &&  in smc_tx_consumer_update()
619 	    !atomic_read(&conn->bytes_to_rcv))  in smc_tx_consumer_update()
620 		conn->local_rx_ctrl.prod_flags.write_blocked = 0;  in smc_tx_consumer_update()