From owner-svn-src-head@freebsd.org Wed Dec 26 10:42:46 2018 Return-Path: Delivered-To: svn-src-head@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 25BE6134C85F; Wed, 26 Dec 2018 10:42:46 +0000 (UTC) (envelope-from kadesai@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id BE62174F44; Wed, 26 Dec 2018 10:42:45 +0000 (UTC) (envelope-from kadesai@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 AFDC32279A; Wed, 26 Dec 2018 10:42:45 +0000 (UTC) (envelope-from kadesai@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id wBQAgjoP040977; Wed, 26 Dec 2018 10:42:45 GMT (envelope-from kadesai@FreeBSD.org) Received: (from kadesai@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id wBQAgjcx040976; Wed, 26 Dec 2018 10:42:45 GMT (envelope-from kadesai@FreeBSD.org) Message-Id: <201812261042.wBQAgjcx040976@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kadesai set sender to kadesai@FreeBSD.org using -f From: Kashyap D Desai Date: Wed, 26 Dec 2018 10:42:45 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r342534 - head/sys/dev/mpr X-SVN-Group: head X-SVN-Commit-Author: kadesai X-SVN-Commit-Paths: head/sys/dev/mpr X-SVN-Commit-Revision: 342534 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: BE62174F44 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.98 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; NEURAL_HAM_SHORT(-0.98)[-0.982,0]; NEURAL_HAM_LONG(-1.00)[-0.999,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 26 Dec 2018 10:42:46 -0000 Author: kadesai Date: Wed Dec 26 10:42:45 2018 New Revision: 342534 URL: https://svnweb.freebsd.org/changeset/base/342534 Log: On Aero/Sea A0 cards retry MPT Fusion registers reads for max three times Due to HW Errta on Aero/Sea A0 chipset on secure boot mode & on heavy IO load, sometimes read operation on MPT Fusion registers will give zero value, So, as a workaround driver will retry the MPT Fusion register read operation for max three times upon reading zero value form these registers. Submitted by: Sreekanth Reddy Reviewed by: Kashyap Desai Approved by: ken MFC after: 3 days Sponsored by: Broadcom Inc Modified: head/sys/dev/mpr/mprvar.h Modified: head/sys/dev/mpr/mprvar.h ============================================================================== --- head/sys/dev/mpr/mprvar.h Wed Dec 26 10:41:53 2018 (r342533) +++ head/sys/dev/mpr/mprvar.h Wed Dec 26 10:42:45 2018 (r342534) @@ -530,7 +530,14 @@ struct scsi_read_capacity_eedp static __inline uint32_t mpr_regread(struct mpr_softc *sc, uint32_t offset) { - return (bus_space_read_4(sc->mpr_btag, sc->mpr_bhandle, offset)); + uint32_t ret_val, i = 0; + do { + ret_val = + bus_space_read_4(sc->mpr_btag, sc->mpr_bhandle, offset); + } while((sc->mpr_flags & MPR_FLAGS_SEA_IOC) && + (ret_val == 0) && (++i < 3)); + + return ret_val; } static __inline void