48 	if (atomic_read(&smc->conn.sndbuf_space) && sock) {  in smc_tx_write_space()
50 			SMC_STAT_RMB_TX_FULL(smc, !smc->conn.lnk);  in smc_tx_write_space()
80 	struct smc_connection *conn = &smc->conn;  in smc_tx_wait()  local
92 		    conn->killed ||  in smc_tx_wait()
93 		    conn->local_tx_ctrl.conn_state_flags.peer_done_writing) {  in smc_tx_wait()
97 		if (smc_cdc_rxed_any_close(conn)) {  in smc_tx_wait()
112 		if (atomic_read(&conn->sndbuf_space) && !conn->urg_tx_pend)  in smc_tx_wait()
118 			      smc_cdc_rxed_any_close(conn) ||  in smc_tx_wait()
119 			      (atomic_read(&conn->sndbuf_space) &&  in smc_tx_wait()
120 			       !conn->urg_tx_pend),  in smc_tx_wait()
147 	struct smc_connection *conn = &smc->conn;  in smc_should_autocork()  local
150 	corking_size = min_t(unsigned int, conn->sndbuf_desc->len >> 1,  in smc_should_autocork()
153 	if (atomic_read(&conn->cdc_pend_tx_wr) == 0 ||  in smc_should_autocork()
154 	    smc_tx_prepared_sends(conn) > corking_size)  in smc_should_autocork()
161 	struct smc_connection *conn = &smc->conn;  in smc_tx_should_cork()  local
172 	    atomic_read(&conn->sndbuf_space))  in smc_tx_should_cork()
185 	struct smc_connection *conn = &smc->conn;  in smc_tx_sendmsg()  local
204 	if (len > conn->sndbuf_desc->len)  in smc_tx_sendmsg()
205 		SMC_STAT_RMB_TX_SIZE_SMALL(smc, !conn->lnk);  in smc_tx_sendmsg()
207 	if (len > conn->peer_rmbe_size)  in smc_tx_sendmsg()
208 		SMC_STAT_RMB_TX_PEER_SIZE_SMALL(smc, !conn->lnk);  in smc_tx_sendmsg()
216 		    conn->killed)  in smc_tx_sendmsg()
218 		if (smc_cdc_rxed_any_close(conn))  in smc_tx_sendmsg()
222 			conn->local_tx_ctrl.prod_flags.urg_data_pending = 1;  in smc_tx_sendmsg()
224 		if (!atomic_read(&conn->sndbuf_space) || conn->urg_tx_pend) {  in smc_tx_sendmsg()
235 		writespace = atomic_read(&conn->sndbuf_space);  in smc_tx_sendmsg()
239 		sndbuf_base = conn->sndbuf_desc->cpu_addr;  in smc_tx_sendmsg()
240 		smc_curs_copy(&prep, &conn->tx_curs_prep, conn);  in smc_tx_sendmsg()
244 		chunk_len = min_t(size_t, copylen, conn->sndbuf_desc->len -  in smc_tx_sendmsg()
252 				smc_sndbuf_sync_sg_for_device(conn);  in smc_tx_sendmsg()
267 		smc_sndbuf_sync_sg_for_device(conn);  in smc_tx_sendmsg()
269 		smc_curs_add(conn->sndbuf_desc->len, &prep, copylen);  in smc_tx_sendmsg()
270 		smc_curs_copy(&conn->tx_curs_prep, &prep, conn);  in smc_tx_sendmsg()
273 		atomic_sub(copylen, &conn->sndbuf_space);  in smc_tx_sendmsg()
280 			conn->urg_tx_pend = true;  in smc_tx_sendmsg()
285 			smc_tx_sndbuf_nonempty(conn);  in smc_tx_sendmsg()
303 int smcd_tx_ism_write(struct smc_connection *conn, void *data, size_t len,  in smcd_tx_ism_write()  argument
308 	rc = smc_ism_write(conn->lgr->smcd, conn->peer_token,  in smcd_tx_ism_write()
309 			   conn->peer_rmbe_idx, signal, conn->tx_off + offset,  in smcd_tx_ism_write()
312 		conn->local_tx_ctrl.conn_state_flags.peer_conn_abort = 1;  in smcd_tx_ism_write()
317 static int smc_tx_rdma_write(struct smc_connection *conn, int peer_rmbe_offset,  in smc_tx_rdma_write()  argument
320 	struct smc_link_group *lgr = conn->lgr;  in smc_tx_rdma_write()
321 	struct smc_link *link = conn->lnk;  in smc_tx_rdma_write()
327 		lgr->rtokens[conn->rtoken_idx][link->link_idx].dma_addr +  in smc_tx_rdma_write()
329 		conn->tx_off +  in smc_tx_rdma_write()
332 	rdma_wr->rkey = lgr->rtokens[conn->rtoken_idx][link->link_idx].rkey;  in smc_tx_rdma_write()
340 static inline void smc_tx_advance_cursors(struct smc_connection *conn,  in smc_tx_advance_cursors()  argument
345 	smc_curs_add(conn->peer_rmbe_size, prod, len);  in smc_tx_advance_cursors()
349 	atomic_sub(len, &conn->peer_rmbe_space);  in smc_tx_advance_cursors()
352 	smc_curs_add(conn->sndbuf_desc->len, sent, len);  in smc_tx_advance_cursors()
356 static int smcr_tx_rdma_writes(struct smc_connection *conn, size_t len,  in smcr_tx_rdma_writes()  argument
361 	struct smc_link *link = conn->lnk;  in smcr_tx_rdma_writes()
364 		sg_dma_address(conn->sndbuf_desc->sgt[link->link_idx].sgl);  in smcr_tx_rdma_writes()
365 	u64 virt_addr = (uintptr_t)conn->sndbuf_desc->cpu_addr;  in smcr_tx_rdma_writes()
386 			sge[srcchunk].addr = conn->sndbuf_desc->is_vm ?  in smcr_tx_rdma_writes()
389 			if (conn->sndbuf_desc->is_vm)  in smcr_tx_rdma_writes()
391 					conn->sndbuf_desc->mr[link->link_idx]->lkey;  in smcr_tx_rdma_writes()
395 			if (src_off >= conn->sndbuf_desc->len)  in smcr_tx_rdma_writes()
396 				src_off -= conn->sndbuf_desc->len;  in smcr_tx_rdma_writes()
404 		rc = smc_tx_rdma_write(conn, dst_off, num_sges, wr);  in smcr_tx_rdma_writes()
413 		src_len = min_t(int, dst_len, conn->sndbuf_desc->len -  in smcr_tx_rdma_writes()
421 static int smcd_tx_rdma_writes(struct smc_connection *conn, size_t len,  in smcd_tx_rdma_writes()  argument
431 			void *data = conn->sndbuf_desc->cpu_addr + src_off;  in smcd_tx_rdma_writes()
433 			rc = smcd_tx_ism_write(conn, data, src_len, dst_off +  in smcd_tx_rdma_writes()
439 			if (src_off >= conn->sndbuf_desc->len)  in smcd_tx_rdma_writes()
440 				src_off -= conn->sndbuf_desc->len;  in smcd_tx_rdma_writes()
454 		src_len = min_t(int, dst_len, conn->sndbuf_desc->len - src_off);  in smcd_tx_rdma_writes()
463 static int smc_tx_rdma_writes(struct smc_connection *conn,  in smc_tx_rdma_writes()  argument
473 	smc_curs_copy(&sent, &conn->tx_curs_sent, conn);  in smc_tx_rdma_writes()
474 	smc_curs_copy(&prep, &conn->tx_curs_prep, conn);  in smc_tx_rdma_writes()
476 	to_send = smc_curs_diff(conn->sndbuf_desc->len, &sent, &prep);  in smc_tx_rdma_writes()
482 	rmbespace = atomic_read(&conn->peer_rmbe_space);  in smc_tx_rdma_writes()
484 		struct smc_sock *smc = container_of(conn, struct smc_sock,  in smc_tx_rdma_writes()
485 						    conn);  in smc_tx_rdma_writes()
486 		SMC_STAT_RMB_TX_PEER_FULL(smc, !conn->lnk);  in smc_tx_rdma_writes()
489 	smc_curs_copy(&prod, &conn->local_tx_ctrl.prod, conn);  in smc_tx_rdma_writes()
490 	smc_curs_copy(&cons, &conn->local_rx_ctrl.cons, conn);  in smc_tx_rdma_writes()
493 	pflags = &conn->local_tx_ctrl.prod_flags;  in smc_tx_rdma_writes()
507 				conn->peer_rmbe_size - prod.count, len);  in smc_tx_rdma_writes()
516 	if (sent.count + dst_len <= conn->sndbuf_desc->len) {  in smc_tx_rdma_writes()
521 		src_len = conn->sndbuf_desc->len - sent.count;  in smc_tx_rdma_writes()
524 	if (conn->lgr->is_smcd)  in smc_tx_rdma_writes()
525 		rc = smcd_tx_rdma_writes(conn, len, sent.count, src_len,  in smc_tx_rdma_writes()
528 		rc = smcr_tx_rdma_writes(conn, len, sent.count, src_len,  in smc_tx_rdma_writes()
533 	if (conn->urg_tx_pend && len == to_send)  in smc_tx_rdma_writes()
535 	smc_tx_advance_cursors(conn, &prod, &sent, len);  in smc_tx_rdma_writes()
537 	smc_curs_copy(&conn->local_tx_ctrl.prod, &prod, conn);  in smc_tx_rdma_writes()
539 	smc_curs_copy(&conn->tx_curs_sent, &sent, conn);/* src: local sndbuf */  in smc_tx_rdma_writes()
547 static int smcr_tx_sndbuf_nonempty(struct smc_connection *conn)  in smcr_tx_sndbuf_nonempty()  argument
549 	struct smc_cdc_producer_flags *pflags = &conn->local_tx_ctrl.prod_flags;  in smcr_tx_sndbuf_nonempty()
550 	struct smc_link *link = conn->lnk;  in smcr_tx_sndbuf_nonempty()
558 	rc = smc_cdc_get_free_slot(conn, link, &wr_buf, &wr_rdma_buf, &pend);  in smcr_tx_sndbuf_nonempty()
563 				container_of(conn, struct smc_sock, conn);  in smcr_tx_sndbuf_nonempty()
567 			if (conn->killed)  in smcr_tx_sndbuf_nonempty()
570 			mod_delayed_work(conn->lgr->tx_wq, &conn->tx_work,  in smcr_tx_sndbuf_nonempty()
576 	spin_lock_bh(&conn->send_lock);  in smcr_tx_sndbuf_nonempty()
577 	if (link != conn->lnk) {  in smcr_tx_sndbuf_nonempty()
585 		rc = smc_tx_rdma_writes(conn, wr_rdma_buf);  in smcr_tx_sndbuf_nonempty()
593 	rc = smc_cdc_msg_send(conn, wr_buf, pend);  in smcr_tx_sndbuf_nonempty()
600 	spin_unlock_bh(&conn->send_lock);  in smcr_tx_sndbuf_nonempty()
605 static int smcd_tx_sndbuf_nonempty(struct smc_connection *conn)  in smcd_tx_sndbuf_nonempty()  argument
607 	struct smc_cdc_producer_flags *pflags = &conn->local_tx_ctrl.prod_flags;  in smcd_tx_sndbuf_nonempty()
610 	spin_lock_bh(&conn->send_lock);  in smcd_tx_sndbuf_nonempty()
612 		rc = smc_tx_rdma_writes(conn, NULL);  in smcd_tx_sndbuf_nonempty()
614 		rc = smcd_cdc_msg_send(conn);  in smcd_tx_sndbuf_nonempty()
620 	spin_unlock_bh(&conn->send_lock);  in smcd_tx_sndbuf_nonempty()
624 static int __smc_tx_sndbuf_nonempty(struct smc_connection *conn)  in __smc_tx_sndbuf_nonempty()  argument
626 	struct smc_sock *smc = container_of(conn, struct smc_sock, conn);  in __smc_tx_sndbuf_nonempty()
630 	if (unlikely(smc_tx_prepared_sends(conn) <= 0))  in __smc_tx_sndbuf_nonempty()
634 	if (unlikely(atomic_read(&conn->peer_rmbe_space) <= 0)) {  in __smc_tx_sndbuf_nonempty()
635 		SMC_STAT_RMB_TX_PEER_FULL(smc, !conn->lnk);  in __smc_tx_sndbuf_nonempty()
639 	if (conn->killed ||  in __smc_tx_sndbuf_nonempty()
640 	    conn->local_rx_ctrl.conn_state_flags.peer_conn_abort) {  in __smc_tx_sndbuf_nonempty()
644 	if (conn->lgr->is_smcd)  in __smc_tx_sndbuf_nonempty()
645 		rc = smcd_tx_sndbuf_nonempty(conn);  in __smc_tx_sndbuf_nonempty()
647 		rc = smcr_tx_sndbuf_nonempty(conn);  in __smc_tx_sndbuf_nonempty()
658 int smc_tx_sndbuf_nonempty(struct smc_connection *conn)  in smc_tx_sndbuf_nonempty()  argument
666 	if (atomic_inc_return(&conn->tx_pushing) > 1)  in smc_tx_sndbuf_nonempty()
670 	atomic_set(&conn->tx_pushing, 1);  in smc_tx_sndbuf_nonempty()
672 	rc = __smc_tx_sndbuf_nonempty(conn);  in smc_tx_sndbuf_nonempty()
680 	if (unlikely(!atomic_dec_and_test(&conn->tx_pushing)))  in smc_tx_sndbuf_nonempty()
690 void smc_tx_pending(struct smc_connection *conn)  in smc_tx_pending()  argument
692 	struct smc_sock *smc = container_of(conn, struct smc_sock, conn);  in smc_tx_pending()
698 	rc = smc_tx_sndbuf_nonempty(conn);  in smc_tx_pending()
699 	if (!rc && conn->local_rx_ctrl.prod_flags.write_blocked &&  in smc_tx_pending()
700 	    !atomic_read(&conn->bytes_to_rcv))  in smc_tx_pending()
701 		conn->local_rx_ctrl.prod_flags.write_blocked = 0;  in smc_tx_pending()
710 	struct smc_connection *conn = container_of(to_delayed_work(work),  in smc_tx_work()  local
713 	struct smc_sock *smc = container_of(conn, struct smc_sock, conn);  in smc_tx_work()
716 	smc_tx_pending(conn);  in smc_tx_work()
720 void smc_tx_consumer_update(struct smc_connection *conn, bool force)  in smc_tx_consumer_update()  argument
723 	int sender_free = conn->rmb_desc->len;  in smc_tx_consumer_update()
726 	smc_curs_copy(&cons, &conn->local_tx_ctrl.cons, conn);  in smc_tx_consumer_update()
727 	smc_curs_copy(&cfed, &conn->rx_curs_confirmed, conn);  in smc_tx_consumer_update()
728 	to_confirm = smc_curs_diff(conn->rmb_desc->len, &cfed, &cons);  in smc_tx_consumer_update()
729 	if (to_confirm > conn->rmbe_update_limit) {  in smc_tx_consumer_update()
730 		smc_curs_copy(&prod, &conn->local_rx_ctrl.prod, conn);  in smc_tx_consumer_update()
731 		sender_free = conn->rmb_desc->len -  in smc_tx_consumer_update()
732 			      smc_curs_diff_large(conn->rmb_desc->len,  in smc_tx_consumer_update()
736 	if (conn->local_rx_ctrl.prod_flags.cons_curs_upd_req ||  in smc_tx_consumer_update()
738 	    ((to_confirm > conn->rmbe_update_limit) &&  in smc_tx_consumer_update()
739 	     ((sender_free <= (conn->rmb_desc->len / 2)) ||  in smc_tx_consumer_update()
740 	      conn->local_rx_ctrl.prod_flags.write_blocked))) {  in smc_tx_consumer_update()
741 		if (conn->killed ||  in smc_tx_consumer_update()
742 		    conn->local_rx_ctrl.conn_state_flags.peer_conn_abort)  in smc_tx_consumer_update()
744 		if ((smc_cdc_get_slot_and_msg_send(conn) < 0) &&  in smc_tx_consumer_update()
745 		    !conn->killed) {  in smc_tx_consumer_update()
746 			queue_delayed_work(conn->lgr->tx_wq, &conn->tx_work,  in smc_tx_consumer_update()
751 	if (conn->local_rx_ctrl.prod_flags.write_blocked &&  in smc_tx_consumer_update()
752 	    !atomic_read(&conn->bytes_to_rcv))  in smc_tx_consumer_update()
753 		conn->local_rx_ctrl.prod_flags.write_blocked = 0;  in smc_tx_consumer_update()