From patchwork Mon Dec 6 22:39:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 12695037 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 1C490C4167D for ; Mon, 6 Dec 2021 22:52:31 +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=RyOoIYvMnQ98idOedhqnXpLz/No3VoHCCeXedE7V+HA=; b=TXuyoBtjJSp97T VEW0uirrihZ51sj2AzLfvcapNxLcEcHPYvJZO/Ga7yCTfqqoSMTOzB1N5mJ36mG2tKGCFJL4VRgdC 9mm2j5Ysl7mPmBIzAGDlcaioxu8+44eBKKSGJr42rZAUnWLzu+huULGq1so1F6Qq2TH8MWbaMsEzZ NaR2FoQ/xuUAOw6A+2rosFrFmkgQI/a2E6WuKfm4TAqALZoJTHhMXBNK3dnIe2/uj8hOxqGTMQRb2 XG7l5GXsjCn2biIGFdINe1pSz9WoB2gg7xxBP+WRYTNo6MVrBByWnIV3EVPOJwF6aVxQhFRYL/c65 fZWSL4v5wCoRDyL2UOFg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1muMoS-006KxH-EE; Mon, 06 Dec 2021 22:50:25 +0000 Received: from galois.linutronix.de ([193.142.43.55]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1muMdp-006FWq-DQ for linux-arm-kernel@lists.infradead.org; Mon, 06 Dec 2021 22:39:29 +0000 Message-ID: <20211206210438.580265315@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1638830364; 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=d/O1r6GWzPTO4w7Ip6GMyRG2CEhIV9xVE+ieJG1DKcg=; b=ojdnHRX7W5rr5t8zmgAtdduINYiu4LKRb3r3f6/OIuuJqOuKFEF33Qc9tCsMsxOMo0pAMr +F8r1QeeMA3Retx1ntVN28K5Y/qaIG2ty4z3QGRfiEFR3fbRjaJMkSASbM9vuFOi88WUOi cXaMl/eX1jDZ3wKGJOzLGGOg1WqpVMBzez8Wmj3NJneHpyyajjZnUpAcnwv8zPlb8YcNu8 Ssy5JvnHLhCHhaWPdxx7a+2FB8KJeWcIKmTCoFOBzsBi86LvyGP23bonaaNsHOi7gKbRTI nm3qWjOzhBoqBAlGzAVg3DiPUVJEUyXoWkQ+d57nQk1qRIHm2dwa34G/YKJv6g== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1638830364; 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=d/O1r6GWzPTO4w7Ip6GMyRG2CEhIV9xVE+ieJG1DKcg=; b=T1zOukYCtxQdJiZAo+Gofc+myREXHUhmierFTd/vgp5GQnHweACNbBUj0GjNPf7E6FB4Ek PtcJrPzi1uxtP2Dg== 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 17/36] PCI/MSI: Use msi_desc::msi_index References: <20211206210307.625116253@linutronix.de> MIME-Version: 1.0 Date: Mon, 6 Dec 2021 23:39:23 +0100 (CET) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211206_143925_837635_FDD94CB3 X-CRM114-Status: GOOD ( 15.77 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The usage of msi_desc::pci::entry_nr is confusing at best. It's the index into the MSI[X] descriptor table. Use msi_desc::msi_index which is shared between all MSI incarnations instead of having a PCI specific storage for no value. Signed-off-by: Thomas Gleixner Reviewed-by: Greg Kroah-Hartman Reviewed-by: Jason Gunthorpe Acked-by: Bjorn Helgaas --- arch/powerpc/platforms/pseries/msi.c | 4 ++-- arch/x86/pci/xen.c | 2 +- drivers/pci/msi/irqdomain.c | 2 +- drivers/pci/msi/msi.c | 20 ++++++++------------ drivers/pci/xen-pcifront.c | 2 +- include/linux/msi.h | 2 -- 6 files changed, 13 insertions(+), 19 deletions(-) --- a/arch/powerpc/platforms/pseries/msi.c +++ b/arch/powerpc/platforms/pseries/msi.c @@ -332,7 +332,7 @@ static int check_msix_entries(struct pci expected = 0; for_each_pci_msi_entry(entry, pdev) { - if (entry->pci.msi_attrib.entry_nr != expected) { + if (entry->msi_index != expected) { pr_debug("rtas_msi: bad MSI-X entries.\n"); return -EINVAL; } @@ -580,7 +580,7 @@ static int pseries_irq_domain_alloc(stru int hwirq; int i, ret; - hwirq = rtas_query_irq_number(pci_get_pdn(pdev), desc->pci.msi_attrib.entry_nr); + hwirq = rtas_query_irq_number(pci_get_pdn(pdev), desc->msi_index); if (hwirq < 0) { dev_err(&pdev->dev, "Failed to query HW IRQ: %d\n", hwirq); return hwirq; --- a/arch/x86/pci/xen.c +++ b/arch/x86/pci/xen.c @@ -306,7 +306,7 @@ static int xen_initdom_setup_msi_irqs(st return -EINVAL; map_irq.table_base = pci_resource_start(dev, bir); - map_irq.entry_nr = msidesc->pci.msi_attrib.entry_nr; + map_irq.entry_nr = msidesc->msi_index; } ret = -EINVAL; --- a/drivers/pci/msi/irqdomain.c +++ b/drivers/pci/msi/irqdomain.c @@ -57,7 +57,7 @@ static irq_hw_number_t pci_msi_domain_ca { struct pci_dev *dev = msi_desc_to_pci_dev(desc); - return (irq_hw_number_t)desc->pci.msi_attrib.entry_nr | + return (irq_hw_number_t)desc->msi_index | pci_dev_id(dev) << 11 | (pci_domain_nr(dev->bus) & 0xFFFFFFFF) << 27; } --- a/drivers/pci/msi/msi.c +++ b/drivers/pci/msi/msi.c @@ -44,7 +44,7 @@ static inline void pci_msi_unmask(struct static inline void __iomem *pci_msix_desc_addr(struct msi_desc *desc) { - return desc->pci.mask_base + desc->pci.msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE; + return desc->pci.mask_base + desc->msi_index * PCI_MSIX_ENTRY_SIZE; } /* @@ -356,13 +356,10 @@ msi_setup_entry(struct pci_dev *dev, int if (dev->dev_flags & PCI_DEV_FLAGS_HAS_MSI_MASKING) control |= PCI_MSI_FLAGS_MASKBIT; - entry->pci.msi_attrib.is_msix = 0; - entry->pci.msi_attrib.is_64 = !!(control & PCI_MSI_FLAGS_64BIT); - entry->pci.msi_attrib.is_virtual = 0; - entry->pci.msi_attrib.entry_nr = 0; + entry->pci.msi_attrib.is_64 = !!(control & PCI_MSI_FLAGS_64BIT); entry->pci.msi_attrib.can_mask = !pci_msi_ignore_mask && !!(control & PCI_MSI_FLAGS_MASKBIT); - entry->pci.msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */ + entry->pci.msi_attrib.default_irq = dev->irq; entry->pci.msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1; entry->pci.msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec)); @@ -496,12 +493,11 @@ static int msix_setup_entries(struct pci entry->pci.msi_attrib.is_64 = 1; if (entries) - entry->pci.msi_attrib.entry_nr = entries[i].entry; + entry->msi_index = entries[i].entry; else - entry->pci.msi_attrib.entry_nr = i; + entry->msi_index = i; - entry->pci.msi_attrib.is_virtual = - entry->pci.msi_attrib.entry_nr >= vec_count; + entry->pci.msi_attrib.is_virtual = entry->msi_index >= vec_count; entry->pci.msi_attrib.can_mask = !pci_msi_ignore_mask && !entry->pci.msi_attrib.is_virtual; @@ -1034,7 +1030,7 @@ int pci_irq_vector(struct pci_dev *dev, struct msi_desc *entry; for_each_pci_msi_entry(entry, dev) { - if (entry->pci.msi_attrib.entry_nr == nr) + if (entry->msi_index == nr) return entry->irq; } WARN_ON_ONCE(1); @@ -1073,7 +1069,7 @@ const struct cpumask *pci_irq_get_affini struct msi_desc *entry; for_each_pci_msi_entry(entry, dev) { - if (entry->pci.msi_attrib.entry_nr == nr) + if (entry->msi_index == nr) return &entry->affinity->mask; } WARN_ON_ONCE(1); --- a/drivers/pci/xen-pcifront.c +++ b/drivers/pci/xen-pcifront.c @@ -263,7 +263,7 @@ static int pci_frontend_enable_msix(stru i = 0; for_each_pci_msi_entry(entry, dev) { - op.msix_entries[i].entry = entry->pci.msi_attrib.entry_nr; + op.msix_entries[i].entry = entry->msi_index; /* Vector is useless at this point. */ op.msix_entries[i].vector = -1; i++; --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -80,7 +80,6 @@ typedef void (*irq_write_msi_msg_t)(stru * @multi_cap: [PCI MSI/X] log2 num of messages supported * @can_mask: [PCI MSI/X] Masking supported? * @is_64: [PCI MSI/X] Address size: 0=32bit 1=64bit - * @entry_nr: [PCI MSI/X] Entry which is described by this descriptor * @default_irq:[PCI MSI/X] The default pre-assigned non-MSI irq * @mask_pos: [PCI MSI] Mask register position * @mask_base: [PCI MSI-X] Mask register base address @@ -97,7 +96,6 @@ struct pci_msi_desc { u8 can_mask : 1; u8 is_64 : 1; u8 is_virtual : 1; - u16 entry_nr; unsigned default_irq; } msi_attrib; union {