From owner-dev-commits-src-main@freebsd.org Thu Feb 18 21:19:36 2021 Return-Path: Delivered-To: dev-commits-src-main@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id A9D9154F7A4; Thu, 18 Feb 2021 21:19:36 +0000 (UTC) (envelope-from git@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) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4DhSJm4RR3z3nwl; Thu, 18 Feb 2021 21:19:36 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 8B2D41F732; Thu, 18 Feb 2021 21:19:36 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 11ILJaJu098875; Thu, 18 Feb 2021 21:19:36 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 11ILJaaE098874; Thu, 18 Feb 2021 21:19:36 GMT (envelope-from git) Date: Thu, 18 Feb 2021 21:19:36 GMT Message-Id: <202102182119.11ILJaaE098874@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Mitchell Horne Subject: git: 04d2d2d7fd22 - main - cgem: improve usage of busdma(9) KPI MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: mhorne X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: 04d2d2d7fd22bba638ccb5a0b2e0805087a70cd3 Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-main@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commit messages for the main branch of the src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 Feb 2021 21:19:36 -0000 The branch main has been updated by mhorne: URL: https://cgit.FreeBSD.org/src/commit/?id=04d2d2d7fd22bba638ccb5a0b2e0805087a70cd3 commit 04d2d2d7fd22bba638ccb5a0b2e0805087a70cd3 Author: Mitchell Horne AuthorDate: 2021-01-20 15:07:53 +0000 Commit: Mitchell Horne CommitDate: 2021-02-18 21:17:41 +0000 cgem: improve usage of busdma(9) KPI BUS_DMA_NOCACHE should only be used when one needs to guarantee the created mapping has uncached memory attributes, usually as a result of buggy hardware. Normal use cases should pass BUS_DMA_COHERENT, to create an appropriate mapping based on the flags passed to bus_dma_tag_create(). This should have no functional change, since the DMA tags in this driver are created without the BUS_DMA_COHERENT flag. Reported by: mmel Reviewed by: mmel, Thomas Skibo MFC after: 3 days --- sys/dev/cadence/if_cgem.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) diff --git a/sys/dev/cadence/if_cgem.c b/sys/dev/cadence/if_cgem.c index 81fc39b831af..0583e846458a 100644 --- a/sys/dev/cadence/if_cgem.c +++ b/sys/dev/cadence/if_cgem.c @@ -443,17 +443,13 @@ cgem_setup_descs(struct cgem_softc *sc) return (err); /* - * Allocate DMA memory in non-cacheable space. We allocate transmit, - * receive and null descriptor queues all at once because the - * hardware only provides one register for the upper 32 bits of - * rx and tx descriptor queues hardware addresses. + * Allocate DMA memory. We allocate transmit, receive and null + * descriptor queues all at once because the hardware only provides + * one register for the upper 32 bits of rx and tx descriptor queues + * hardware addresses. */ err = bus_dmamem_alloc(sc->desc_dma_tag, (void **)&sc->rxring, -#ifdef __arm__ BUS_DMA_NOWAIT | BUS_DMA_COHERENT | BUS_DMA_ZERO, -#else - BUS_DMA_NOWAIT | BUS_DMA_NOCACHE | BUS_DMA_ZERO, -#endif &sc->rxring_dma_map); if (err) return (err);