From patchwork Mon Dec 6 22:39:37 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 12660205 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7CE62C433F5 for ; Mon, 6 Dec 2021 22:48:35 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.240068.416393 (Exim 4.92) (envelope-from ) id 1muMmP-0006Nz-CT; Mon, 06 Dec 2021 22:48:17 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 240068.416393; Mon, 06 Dec 2021 22:48:17 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1muMmP-0006NF-88; Mon, 06 Dec 2021 22:48:17 +0000 Received: by outflank-mailman (input) for mailman id 240068; Mon, 06 Dec 2021 22:48:16 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1muMe3-0004ul-A0 for xen-devel@lists.xenproject.org; Mon, 06 Dec 2021 22:39:39 +0000 Received: from galois.linutronix.de (galois.linutronix.de [193.142.43.55]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id 65269bd2-56e5-11ec-8a4d-196798b21f7b; Mon, 06 Dec 2021 23:39:38 +0100 (CET) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 65269bd2-56e5-11ec-8a4d-196798b21f7b Message-ID: <20211206210439.074795958@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1638830378; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=cOZ0U3ouey82JJdJiPY/OdjPVZlxKAZBH84jVxEoqTU=; b=wz3TzWYBvl04aCerKYeWR58lfzMKGU0iQIuBeqOL+QMp3fzox5TmpoLeGGdAyjIdRF9we0 u9yR0O7Qw/bXjizcycQ1gt+G/WeBK/oTI1LUwf2kX7mBg7E4BLQU+LhtJn98G1rHyhAeXN uZibzflizAgUufHizJH6rsQmehdTaX7twbvYr5V+KethG1Scbt8X2tNbTw+IA0tYplWXos ZwOGv2nZnU5zW+yHNbttX2IEcKFWRwLT0XfzLzZMFn7NfGrUzA3FstQug2ylwpcRUwc/5i kvFiRVvXUUkrTAhTuq9cCrdEEKtF1I+UAps11N3QhGaOgS9dJJn2kcoxCDkHWQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1638830378; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=cOZ0U3ouey82JJdJiPY/OdjPVZlxKAZBH84jVxEoqTU=; b=hWRF+jAuLUmdTtCJbsFelzhT8GqoJCFIgM9B0HzB2yZ+yr1G/1kR55tWj9RhnBzNSOA67w E7/UVXYkvpVaIZCQ== From: Thomas Gleixner To: LKML Cc: Bjorn Helgaas , Marc Zygnier , Alex Williamson , Kevin Tian , Jason Gunthorpe , Megha Dey , Ashok Raj , linux-pci@vger.kernel.org, Cedric Le Goater , xen-devel@lists.xenproject.org, Juergen Gross , Greg Kroah-Hartman , Will Deacon , Santosh Shilimkar , iommu@lists.linux-foundation.org, dmaengine@vger.kernel.org, Stuart Yoder , Laurentiu Tudor , Nishanth Menon , Tero Kristo , linux-arm-kernel@lists.infradead.org, Vinod Koul , Mark Rutland , Robin Murphy , Sinan Kaya Subject: [patch V2 26/36] powerpc/pseries/msi: Let core code check for contiguous entries References: <20211206210307.625116253@linutronix.de> MIME-Version: 1.0 Date: Mon, 6 Dec 2021 23:39:37 +0100 (CET) Set the domain info flag and remove the check. Signed-off-by: Thomas Gleixner Reviewed-by: Greg Kroah-Hartman --- V2: Remove it completely - Cedric --- arch/powerpc/platforms/pseries/msi.c | 33 ++++++++------------------------- 1 file changed, 8 insertions(+), 25 deletions(-) --- a/arch/powerpc/platforms/pseries/msi.c +++ b/arch/powerpc/platforms/pseries/msi.c @@ -321,27 +321,6 @@ static int msi_quota_for_device(struct p return request; } -static int check_msix_entries(struct pci_dev *pdev) -{ - struct msi_desc *entry; - int expected; - - /* There's no way for us to express to firmware that we want - * a discontiguous, or non-zero based, range of MSI-X entries. - * So we must reject such requests. */ - - expected = 0; - for_each_pci_msi_entry(entry, pdev) { - if (entry->msi_index != expected) { - pr_debug("rtas_msi: bad MSI-X entries.\n"); - return -EINVAL; - } - expected++; - } - - return 0; -} - static void rtas_hack_32bit_msi_gen2(struct pci_dev *pdev) { u32 addr_hi, addr_lo; @@ -380,9 +359,6 @@ static int rtas_prepare_msi_irqs(struct if (quota && quota < nvec) return quota; - if (type == PCI_CAP_ID_MSIX && check_msix_entries(pdev)) - return -EINVAL; - /* * Firmware currently refuse any non power of two allocation * so we round up if the quota will allow it. @@ -530,9 +506,16 @@ static struct irq_chip pseries_pci_msi_i .irq_write_msi_msg = pseries_msi_write_msg, }; + +/* + * Set MSI_FLAG_MSIX_CONTIGUOUS as there is no way to express to + * firmware to request a discontiguous or non-zero based range of + * MSI-X entries. Core code will reject such setup attempts. + */ static struct msi_domain_info pseries_msi_domain_info = { .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS | - MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX), + MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX | + MSI_FLAG_MSIX_CONTIGUOUS), .ops = &pseries_pci_msi_domain_ops, .chip = &pseries_pci_msi_irq_chip, };