From owner-svn-src-all@freebsd.org Thu May 24 06:44:07 2018 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id A3137F5D08B; Thu, 24 May 2018 06:44:07 +0000 (UTC) (envelope-from np@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 530EB79453; Thu, 24 May 2018 06:44:07 +0000 (UTC) (envelope-from np@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 mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 341C56C5D; Thu, 24 May 2018 06:44:07 +0000 (UTC) (envelope-from np@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w4O6i6uv070830; Thu, 24 May 2018 06:44:06 GMT (envelope-from np@FreeBSD.org) Received: (from np@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w4O6i6IF070829; Thu, 24 May 2018 06:44:06 GMT (envelope-from np@FreeBSD.org) Message-Id: <201805240644.w4O6i6IF070829@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: np set sender to np@FreeBSD.org using -f From: Navdeep Parhar Date: Thu, 24 May 2018 06:44:06 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r334132 - head/sys/dev/cxgbe X-SVN-Group: head X-SVN-Commit-Author: np X-SVN-Commit-Paths: head/sys/dev/cxgbe X-SVN-Commit-Revision: 334132 X-SVN-Commit-Repository: base 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: 2.1.26 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: Thu, 24 May 2018 06:44:07 -0000 Author: np Date: Thu May 24 06:44:06 2018 New Revision: 334132 URL: https://svnweb.freebsd.org/changeset/base/334132 Log: cxgbe(4): Make sure that the egress queue's cidx is updated periodically when the driver is writing WRs using start_wrq_wr/commit_wrq_wr all the time. Sponsored by: Chelsio Communications Modified: head/sys/dev/cxgbe/t4_sge.c Modified: head/sys/dev/cxgbe/t4_sge.c ============================================================================== --- head/sys/dev/cxgbe/t4_sge.c Thu May 24 04:43:40 2018 (r334131) +++ head/sys/dev/cxgbe/t4_sge.c Thu May 24 06:44:06 2018 (r334132) @@ -2367,9 +2367,29 @@ commit_wrq_wr(struct sge_wrq *wrq, void *w, struct wrq next = TAILQ_NEXT(cookie, link); if (prev == NULL) { MPASS(pidx == eq->dbidx); - if (next == NULL || ndesc >= 16) + if (next == NULL || ndesc >= 16) { + int available; + struct fw_eth_tx_pkt_wr *dst; /* any fw WR struct will do */ + + /* + * Note that the WR via which we'll request tx updates + * is at pidx and not eq->pidx, which has moved on + * already. + */ + dst = (void *)&eq->desc[pidx]; + available = IDXDIFF(eq->cidx, eq->pidx, eq->sidx) - 1; + if (available < eq->sidx / 4 && + atomic_cmpset_int(&eq->equiq, 0, 1)) { + dst->equiq_to_len16 |= htobe32(F_FW_WR_EQUIQ | + F_FW_WR_EQUEQ); + eq->equeqidx = pidx; + } else if (IDXDIFF(eq->pidx, eq->equeqidx, eq->sidx) >= 32) { + dst->equiq_to_len16 |= htobe32(F_FW_WR_EQUEQ); + eq->equeqidx = pidx; + } + ring_eq_db(wrq->adapter, eq, ndesc); - else { + } else { MPASS(IDXDIFF(next->pidx, pidx, eq->sidx) == ndesc); next->pidx = pidx; next->ndesc += ndesc;