From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753777AbcIOTBS (ORCPT ); Thu, 15 Sep 2016 15:01:18 -0400 Received: from terminus.zytor.com ([198.137.202.10]:50266 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751259AbcIOTBI (ORCPT ); Thu, 15 Sep 2016 15:01:08 -0400 Date: Thu, 15 Sep 2016 12:00:57 -0700 From: tip-bot for Thomas Gleixner Message-ID: Cc: hpa@zytor.com, tglx@linutronix.de, linux-kernel@vger.kernel.org, hch@lst.de, mingo@kernel.org Reply-To: linux-kernel@vger.kernel.org, hch@lst.de, mingo@kernel.org, hpa@zytor.com, tglx@linutronix.de In-Reply-To: <1473862739-15032-2-git-send-email-hch@lst.de> References: <1473862739-15032-2-git-send-email-hch@lst.de> To: linux-tip-commits@vger.kernel.org Subject: [tip:irq/core] genirq/msi: Add cpumask allocation to alloc_msi_entry Git-Commit-ID: 28f4b04143c56135b1ca742fc64b664ed04de6a4 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 28f4b04143c56135b1ca742fc64b664ed04de6a4 Gitweb: http://git.kernel.org/tip/28f4b04143c56135b1ca742fc64b664ed04de6a4 Author: Thomas Gleixner AuthorDate: Wed, 14 Sep 2016 16:18:47 +0200 Committer: Thomas Gleixner CommitDate: Wed, 14 Sep 2016 22:11:08 +0200 genirq/msi: Add cpumask allocation to alloc_msi_entry For irq spreading want to store affinity masks in the msi_entry. Add the infrastructure for it. We allocate an array of cpumasks with an array size of the number of used vectors in the entry, so we can hand in the information per linux interrupt later. As we hand in the number of used vectors, we assign them right away. Convert all the call sites. Signed-off-by: Thomas Gleixner Cc: axboe@fb.com Cc: keith.busch@intel.com Cc: agordeev@redhat.com Cc: linux-block@vger.kernel.org Cc: Christoph Hellwig Link: http://lkml.kernel.org/r/1473862739-15032-2-git-send-email-hch@lst.de --- drivers/base/platform-msi.c | 3 +-- drivers/pci/msi.c | 6 ++---- drivers/staging/fsl-mc/bus/mc-msi.c | 3 +-- include/linux/msi.h | 5 +++-- kernel/irq/msi.c | 26 ++++++++++++++++++++++++-- 5 files changed, 31 insertions(+), 12 deletions(-) diff --git a/drivers/base/platform-msi.c b/drivers/base/platform-msi.c index 279e539..be6a599 100644 --- a/drivers/base/platform-msi.c +++ b/drivers/base/platform-msi.c @@ -142,13 +142,12 @@ static int platform_msi_alloc_descs_with_irq(struct device *dev, int virq, } for (i = 0; i < nvec; i++) { - desc = alloc_msi_entry(dev); + desc = alloc_msi_entry(dev, 1, NULL); if (!desc) break; desc->platform.msi_priv_data = data; desc->platform.msi_index = base + i; - desc->nvec_used = 1; desc->irq = virq ? virq + i : 0; list_add_tail(&desc->list, dev_to_msi_list(dev)); diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 98f1222..0db72ba 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -555,7 +555,7 @@ static struct msi_desc *msi_setup_entry(struct pci_dev *dev, int nvec) struct msi_desc *entry; /* MSI Entry Initialization */ - entry = alloc_msi_entry(&dev->dev); + entry = alloc_msi_entry(&dev->dev, nvec, NULL); if (!entry) return NULL; @@ -568,7 +568,6 @@ static struct msi_desc *msi_setup_entry(struct pci_dev *dev, int nvec) entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */ entry->msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1; entry->msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec)); - entry->nvec_used = nvec; entry->affinity = dev->irq_affinity; if (control & PCI_MSI_FLAGS_64BIT) @@ -693,7 +692,7 @@ static int msix_setup_entries(struct pci_dev *dev, void __iomem *base, mask = cpumask_of(cpu); } - entry = alloc_msi_entry(&dev->dev); + entry = alloc_msi_entry(&dev->dev, 1, NULL); if (!entry) { if (!i) iounmap(base); @@ -711,7 +710,6 @@ static int msix_setup_entries(struct pci_dev *dev, void __iomem *base, entry->msi_attrib.entry_nr = i; entry->msi_attrib.default_irq = dev->irq; entry->mask_base = base; - entry->nvec_used = 1; entry->affinity = mask; list_add_tail(&entry->list, dev_to_msi_list(&dev->dev)); diff --git a/drivers/staging/fsl-mc/bus/mc-msi.c b/drivers/staging/fsl-mc/bus/mc-msi.c index c7be156..4fd8e41 100644 --- a/drivers/staging/fsl-mc/bus/mc-msi.c +++ b/drivers/staging/fsl-mc/bus/mc-msi.c @@ -213,7 +213,7 @@ static int fsl_mc_msi_alloc_descs(struct device *dev, unsigned int irq_count) struct msi_desc *msi_desc; for (i = 0; i < irq_count; i++) { - msi_desc = alloc_msi_entry(dev); + msi_desc = alloc_msi_entry(dev, 1, NULL); if (!msi_desc) { dev_err(dev, "Failed to allocate msi entry\n"); error = -ENOMEM; @@ -221,7 +221,6 @@ static int fsl_mc_msi_alloc_descs(struct device *dev, unsigned int irq_count) } msi_desc->fsl_mc.msi_index = i; - msi_desc->nvec_used = 1; INIT_LIST_HEAD(&msi_desc->list); list_add_tail(&msi_desc->list, dev_to_msi_list(dev)); } diff --git a/include/linux/msi.h b/include/linux/msi.h index e8c81fb..0db320b 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -68,7 +68,7 @@ struct msi_desc { unsigned int nvec_used; struct device *dev; struct msi_msg msg; - const struct cpumask *affinity; + struct cpumask *affinity; union { /* PCI MSI/X specific data */ @@ -123,7 +123,8 @@ static inline void *msi_desc_to_pci_sysdata(struct msi_desc *desc) } #endif /* CONFIG_PCI_MSI */ -struct msi_desc *alloc_msi_entry(struct device *dev); +struct msi_desc *alloc_msi_entry(struct device *dev, int nvec, + const struct cpumask *affinity); void free_msi_entry(struct msi_desc *entry); void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg); void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg); diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c index 19e9dfb..8a3e8727 100644 --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -18,20 +18,42 @@ /* Temparory solution for building, will be removed later */ #include -struct msi_desc *alloc_msi_entry(struct device *dev) +/** + * alloc_msi_entry - Allocate an initialize msi_entry + * @dev: Pointer to the device for which this is allocated + * @nvec: The number of vectors used in this entry + * @affinity: Optional pointer to an affinity mask array size of @nvec + * + * If @affinity is not NULL then a an affinity array[@nvec] is allocated + * and the affinity masks from @affinity are copied. + */ +struct msi_desc * +alloc_msi_entry(struct device *dev, int nvec, const struct cpumask *affinity) { - struct msi_desc *desc = kzalloc(sizeof(*desc), GFP_KERNEL); + struct msi_desc *desc; + + desc = kzalloc(sizeof(*desc), GFP_KERNEL); if (!desc) return NULL; INIT_LIST_HEAD(&desc->list); desc->dev = dev; + desc->nvec_used = nvec; + if (affinity) { + desc->affinity = kmemdup(affinity, + nvec * sizeof(*desc->affinity), GFP_KERNEL); + if (!desc->affinity) { + kfree(desc); + return NULL; + } + } return desc; } void free_msi_entry(struct msi_desc *entry) { + kfree(entry->affinity); kfree(entry); }