From owner-svn-src-all@freebsd.org Fri Jul 29 21:03:31 2016 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id DBE78BA89B3; Fri, 29 Jul 2016 21:03:31 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id B3CCF1ABB; Fri, 29 Jul 2016 21:03:31 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id u6TL3UgI069043; Fri, 29 Jul 2016 21:03:30 GMT (envelope-from mav@FreeBSD.org) Received: (from mav@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id u6TL3ULp069042; Fri, 29 Jul 2016 21:03:30 GMT (envelope-from mav@FreeBSD.org) Message-Id: <201607292103.u6TL3ULp069042@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mav set sender to mav@FreeBSD.org using -f From: Alexander Motin Date: Fri, 29 Jul 2016 21:03:30 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r303514 - head/sys/dev/ntb X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 29 Jul 2016 21:03:32 -0000 Author: mav Date: Fri Jul 29 21:03:30 2016 New Revision: 303514 URL: https://svnweb.freebsd.org/changeset/base/303514 Log: Fix NTBT_QP_LINKS negotiation. I believe it never worked correctly for more the one queue even in Linux. This fixes case when one of consumer drivers is not loaded on one side, but its queues still announced as ready if something else brought link up. While there, remove some pointless NULL checks. Modified: head/sys/dev/ntb/ntb_transport.c Modified: head/sys/dev/ntb/ntb_transport.c ============================================================================== --- head/sys/dev/ntb/ntb_transport.c Fri Jul 29 21:03:02 2016 (r303513) +++ head/sys/dev/ntb/ntb_transport.c Fri Jul 29 21:03:30 2016 (r303514) @@ -572,9 +572,6 @@ ntb_transport_free_queue(struct ntb_tran struct ntb_transport_ctx *nt = qp->transport; struct ntb_queue_entry *entry; - if (qp == NULL) - return; - callout_drain(&qp->link_work); ntb_db_set_mask(qp->dev, 1ull << qp->qp_num); @@ -694,7 +691,7 @@ ntb_transport_tx_enqueue(struct ntb_tran struct ntb_queue_entry *entry; int rc; - if (qp == NULL || !qp->link_is_up || len == 0) { + if (!qp->link_is_up || len == 0) { CTR0(KTR_NTB, "TX: link not up"); return (EINVAL); } @@ -1059,11 +1056,9 @@ ntb_transport_link_work(void *arg) size >> 32); ntb_peer_spad_write(dev, NTBT_MW0_SZ_LOW + (i * 2), size); } - ntb_peer_spad_write(dev, NTBT_NUM_MWS, nt->mw_count); - ntb_peer_spad_write(dev, NTBT_NUM_QPS, nt->qp_count); - + ntb_peer_spad_write(dev, NTBT_QP_LINKS, 0); ntb_peer_spad_write(dev, NTBT_VERSION, NTB_TRANSPORT_VERSION); /* Query the remote side for its info */ @@ -1245,16 +1240,18 @@ ntb_qp_link_work(void *arg) struct ntb_transport_qp *qp = arg; device_t dev = qp->dev; struct ntb_transport_ctx *nt = qp->transport; - uint32_t val, dummy; - - ntb_spad_read(dev, NTBT_QP_LINKS, &val); - - ntb_peer_spad_write(dev, NTBT_QP_LINKS, val | (1ull << qp->qp_num)); + int i; + uint32_t val; - /* query remote spad for qp ready bits */ - ntb_peer_spad_read(dev, NTBT_QP_LINKS, &dummy); + /* Report queues that are up on our side */ + for (i = 0, val = 0; i < nt->qp_count; i++) { + if (nt->qp_vec[i].client_ready) + val |= (1 << i); + } + ntb_peer_spad_write(dev, NTBT_QP_LINKS, val); /* See if the remote side is up */ + ntb_spad_read(dev, NTBT_QP_LINKS, &val); if ((val & (1ull << qp->qp_num)) != 0) { ntb_printf(2, "qp %d link up\n", qp->qp_num); qp->link_is_up = true; @@ -1350,17 +1347,16 @@ ntb_qp_link_cleanup(struct ntb_transport void ntb_transport_link_down(struct ntb_transport_qp *qp) { + struct ntb_transport_ctx *nt = qp->transport; + int i; uint32_t val; - if (qp == NULL) - return; - qp->client_ready = false; - - ntb_spad_read(qp->dev, NTBT_QP_LINKS, &val); - - ntb_peer_spad_write(qp->dev, NTBT_QP_LINKS, - val & ~(1 << qp->qp_num)); + for (i = 0, val = 0; i < nt->qp_count; i++) { + if (nt->qp_vec[i].client_ready) + val |= (1 << i); + } + ntb_peer_spad_write(qp->dev, NTBT_QP_LINKS, val); if (qp->link_is_up) ntb_send_link_down(qp); @@ -1379,8 +1375,6 @@ ntb_transport_link_down(struct ntb_trans bool ntb_transport_link_query(struct ntb_transport_qp *qp) { - if (qp == NULL) - return (false); return (qp->link_is_up); } @@ -1479,8 +1473,6 @@ out: */ unsigned char ntb_transport_qp_num(struct ntb_transport_qp *qp) { - if (qp == NULL) - return 0; return (qp->qp_num); } @@ -1497,9 +1489,6 @@ unsigned int ntb_transport_max_size(struct ntb_transport_qp *qp) { - if (qp == NULL) - return (0); - return (qp->tx_max_frame - sizeof(struct ntb_payload_header)); }