From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 B508AC433F5 for ; Sat, 27 Nov 2021 02:18:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Date:MIME-Version:References:Subject:Cc :To:From:Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: List-Owner; bh=gnQubta/NQhor96VFSvB87yN9miV3s/NeVqwYIJgtNE=; b=tPZmdaWLYgXxPJ fsKCFhQCo8+bFjmvl3OibjzrXw+YAI7JG7GhrH44333igBww1effgIFISwp+78BYLW63cKCxh9Sru CB1kdcGNgvVARD5AjVTTbBMBFl+PTknpeyyFVx8/c7QyD4xeI+GJhHP9WjtXDodc8zRUAK4YH+mg/ 2f/TRw/sQQyU/WUZnAjfcys5BLj2b0pKNjQ/RxM/Tw2+2cdHNmxOhA+8V1XobC9RA82ZnX3ZT7Yai KKpcYjAVMwB+eETYxc3nzmtznCQX7nmnO8NQ5KtjP8G3V6MGdnMs5MDxMOoMroskSwdCTEpa7nyW8 WGy6GeeFqfS6PejQMfKA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mqnGD-00CYjl-Gi; Sat, 27 Nov 2021 02:16:18 +0000 Received: from galois.linutronix.de ([2a0a:51c0:0:12e:550::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mqmPg-00CB7q-Ls for linux-arm-kernel@lists.infradead.org; Sat, 27 Nov 2021 01:22:06 +0000 Message-ID: <20211126230525.491832071@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1637976119; 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=iaLCpiERLpuGITLjESnXqZksSqXjgw+jF1i/FwPrQ3E=; b=W2GuIJlq7AQkjY+TpBwh6iize8fxXkwX0xPm+QTJEjeJCk2Yy5+rjcuVL9Kvk4D68OrcFB kGcc2ghnZOrnr6tpvjGmSh4+aJDEcl5r74sHp6aDCrP7EEgunndhTONTlrJQUk++KwmbIe Mt1ytGTecL/R4yk3s6utBEQXp0Lg9Eq9Kc5+2T7fknjDX+ze2RU5DaKW6DVMkGzq4uCOR/ CShgn71xiUys5oR1D4yVMiQypEzLwc1sp9YOKmO6aYS6kcxe2K4TzJM5gLoxGag7TCkFH3 U1zO0BvQZu6z+CX7p5bL+DVLgzurBhOGGTM/BJC9O7SykOziozKfCrtzlvGh2g== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1637976119; 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=iaLCpiERLpuGITLjESnXqZksSqXjgw+jF1i/FwPrQ3E=; b=zL3aej6xUWG5VzZFErreMPztALkuHXw5/PtsQzPaqu8b+sAM4YZ06QzJSDSIc+Xlek+ghk M3PMcrDWSdjuiaAw== 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, Greg Kroah-Hartman , 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, x86@kernel.org, Vinod Koul , Mark Rutland , Will Deacon , Sinan Kaya Subject: [patch 26/37] PCI/MSI: Provide MSI_FLAG_MSIX_CONTIGUOUS References: <20211126224100.303046749@linutronix.de> MIME-Version: 1.0 Date: Sat, 27 Nov 2021 02:21:58 +0100 (CET) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211126_172200_914695_7B84F7C7 X-CRM114-Status: GOOD ( 13.66 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Message-ID: <20211127012158.ak0zA3_MYKtTyddCElckaYcWHMUiAxZW5eYHZZjHers@z> Provide a domain info flag which makes the core code check for a contiguous MSI-X index on allocation. That's simpler than checking it at some other domain callback in architecture code. Signed-off-by: Thomas Gleixner --- drivers/pci/msi/irqdomain.c | 16 ++++++++++++++-- include/linux/msi.h | 2 ++ 2 files changed, 16 insertions(+), 2 deletions(-) --- a/drivers/pci/msi/irqdomain.c +++ b/drivers/pci/msi/irqdomain.c @@ -89,9 +89,21 @@ static int pci_msi_domain_check_cap(stru if (pci_msi_desc_is_multi_msi(desc) && !(info->flags & MSI_FLAG_MULTI_PCI_MSI)) return 1; - else if (desc->pci.msi_attrib.is_msix && !(info->flags & MSI_FLAG_PCI_MSIX)) - return -ENOTSUPP; + if (desc->pci.msi_attrib.is_msix) { + if (!(info->flags & MSI_FLAG_PCI_MSIX)) + return -ENOTSUPP; + + if (info->flags & MSI_FLAG_MSIX_CONTIGUOUS) { + unsigned int idx = 0; + + /* Check for gaps in the entry indices */ + for_each_msi_entry(desc, dev) { + if (desc->msi_index != idx++) + return -ENOTSUPP; + } + } + } return 0; } --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -378,6 +378,8 @@ enum { MSI_FLAG_LEVEL_CAPABLE = (1 << 6), /* Populate sysfs on alloc() and destroy it on free() */ MSI_FLAG_DEV_SYSFS = (1 << 7), + /* MSI-X entries must be contiguous */ + MSI_FLAG_MSIX_CONTIGUOUS = (1 << 8), }; int msi_domain_set_affinity(struct irq_data *data, const struct cpumask *mask, _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel