From owner-dev-commits-src-all@freebsd.org Fri Jul 2 22:05:38 2021 Return-Path: Delivered-To: dev-commits-src-all@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 33B44673590; Fri, 2 Jul 2021 22:05:38 +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 4GGq0208rCz4Vdl; Fri, 2 Jul 2021 22:05:38 +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 DD7F41BDD9; Fri, 2 Jul 2021 22:05:37 +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 162M5bnL010255; Fri, 2 Jul 2021 22:05:37 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 162M5b87010254; Fri, 2 Jul 2021 22:05:37 GMT (envelope-from git) Date: Fri, 2 Jul 2021 22:05:37 GMT Message-Id: <202107022205.162M5b87010254@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Warner Losh Subject: git: fea3cf1d6da0 - main - nvme: Fix alignment on nvme structures MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: imp X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: fea3cf1d6da0acf40bc1d3dadeeea7eeccbc10dd Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-all@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commit messages for all branches of the src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 02 Jul 2021 22:05:38 -0000 The branch main has been updated by imp: URL: https://cgit.FreeBSD.org/src/commit/?id=fea3cf1d6da0acf40bc1d3dadeeea7eeccbc10dd commit fea3cf1d6da0acf40bc1d3dadeeea7eeccbc10dd Author: Warner Losh AuthorDate: 2021-07-02 21:58:19 +0000 Commit: Warner Losh CommitDate: 2021-07-02 22:05:19 +0000 nvme: Fix alignment on nvme structures Remove __packed from nvme_command, nvme_completion and nvme_dsm_trim. Add super-alignment to nvme_completion since it's always at least that aligned in hardware (and in our existing uses of it embedded in structures). It generates better code in nvme_qpair_process_completions on riscv64 because otherwise the ABI assumes a 4-byte alignment, and the same on all other platforms. Reviewed by: jrtc27@, mav@, chuck@ Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D31001 --- sys/dev/nvme/nvme.h | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/sys/dev/nvme/nvme.h b/sys/dev/nvme/nvme.h index d63a074f321d..7d153c61165c 100644 --- a/sys/dev/nvme/nvme.h +++ b/sys/dev/nvme/nvme.h @@ -578,8 +578,8 @@ struct nvme_registers { struct { uint32_t sq_tdbl; /* submission queue tail doorbell */ uint32_t cq_hdbl; /* completion queue head doorbell */ - } doorbell[1] __packed; -} __packed; + } doorbell[1]; +}; _Static_assert(sizeof(struct nvme_registers) == 0x1008, "bad size for nvme_registers"); @@ -612,7 +612,7 @@ struct nvme_command { uint32_t cdw13; /* command-specific */ uint32_t cdw14; /* command-specific */ uint32_t cdw15; /* command-specific */ -} __packed; +}; _Static_assert(sizeof(struct nvme_command) == 16 * 4, "bad size for nvme_command"); @@ -630,7 +630,7 @@ struct nvme_completion { /* dword 3 */ uint16_t cid; /* command identifier */ uint16_t status; -} __packed; +} __aligned(8); /* riscv: nvme_qpair_process_completions has better code gen */ _Static_assert(sizeof(struct nvme_completion) == 4 * 4, "bad size for nvme_completion"); @@ -638,7 +638,7 @@ struct nvme_dsm_range { uint32_t attributes; uint32_t length; uint64_t starting_lba; -} __packed; +}; /* Largest DSM Trim that can be done */ #define NVME_MAX_DSM_TRIM 4096