From: Marc Zyngier <marc.zyngier@arm.com>
To: Thomas Gleixner <tglx@linutronix.de>,
Jiang Liu <jiang.liu@linux.intel.com>,
Jason Cooper <jason@lakedaemon.net>
Cc: Ma Jun <majun258@huawei.com>,
<linux-arm-kernel@lists.infradead.org>,
<linux-pci@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH RFC 5/7] genirq/msi: Add msi_domain_populate_irqs
Date: Thu, 15 Oct 2015 16:39:26 +0100 [thread overview]
Message-ID: <1444923568-17413-6-git-send-email-marc.zyngier@arm.com> (raw)
In-Reply-To: <1444923568-17413-1-git-send-email-marc.zyngier@arm.com>
To be able to allocate interrupts from the MSI layer down,
add a new msi_domain_populate_irqs entry point.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
include/linux/msi.h | 2 ++
kernel/irq/msi.c | 27 +++++++++++++++++++++++++++
2 files changed, 29 insertions(+)
diff --git a/include/linux/msi.h b/include/linux/msi.h
index 5bb36a9..e35558c 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -281,6 +281,8 @@ void platform_msi_domain_free_irqs(struct device *dev);
/* When an MSI domain is used as an intermediate domain */
int msi_domain_prepare_irqs(struct irq_domain *domain, struct device *dev,
int nvec, msi_alloc_info_t *args);
+int msi_domain_populate_irqs(struct irq_domain *domain, struct device *dev,
+ int virq, int nvec, msi_alloc_info_t *args);
#endif /* CONFIG_GENERIC_MSI_IRQ_DOMAIN */
#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c
index 8e6e112..53118e9 100644
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -272,6 +272,33 @@ int msi_domain_prepare_irqs(struct irq_domain *domain, struct device *dev,
return 0;
}
+int msi_domain_populate_irqs(struct irq_domain *domain, struct device *dev,
+ int virq, int nvec, msi_alloc_info_t *arg)
+{
+ struct msi_domain_info *info = domain->host_data;
+ struct msi_domain_ops *ops = info->ops;
+ struct msi_desc *desc;
+
+ for_each_msi_entry(desc, dev) {
+ int i, ret;
+
+ if (!(desc->irq >= virq && desc->irq < (virq + nvec)))
+ continue;
+
+ ops->set_desc(arg, desc);
+ /* Assumes the domain mutex is held! */
+ ret = irq_domain_alloc_irqs_recursive(domain, virq, nvec, arg);
+ /* FIXME: Error handling */
+ if (ret)
+ return ret;
+
+ for (i = 0; i < desc->nvec_used; i++)
+ irq_set_msi_desc_off(virq, i, desc);
+ }
+
+ return 0;
+}
+
/**
* msi_domain_alloc_irqs - Allocate interrupts from a MSI interrupt domain
* @domain: The domain to allocate from
--
2.1.4
next prev parent reply other threads:[~2015-10-15 15:39 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-15 15:39 [PATCH RFC 0/7] Adding core support for wire-MSI bridges Marc Zyngier
2015-10-15 15:39 ` [PATCH RFC 1/7] platform-msi: Allow MSIs to be allocated in chunks Marc Zyngier
2015-10-15 15:39 ` [PATCH RFC 2/7] platform-msi: Factor out allocation/free of private data Marc Zyngier
2015-10-16 5:46 ` Jiang Liu
2015-10-16 8:50 ` Marc Zyngier
2015-10-15 15:39 ` [PATCH RFC 3/7] irqdomain: Make irq_domain_alloc_irqs_recursive available Marc Zyngier
2015-10-15 15:39 ` [PATCH RFC 4/7] genirq/msi: Make the .prepare callback reusable Marc Zyngier
2015-10-15 17:24 ` Gabriele Paoloni
2015-10-15 17:39 ` Marc Zyngier
2015-10-16 13:07 ` Gabriele Paoloni
2015-10-16 5:45 ` Jiang Liu
2015-10-16 8:48 ` Marc Zyngier
2015-10-15 15:39 ` Marc Zyngier [this message]
2015-10-15 15:39 ` [PATCH RFC 6/7] platform-msi: Allow creation of a MSI-based stacked irq domain Marc Zyngier
2015-10-15 15:39 ` [PATCH RFC 7/7] irqchip: [Example] dummy wired interrupt/MSI bridge driver Marc Zyngier
2015-11-04 8:00 ` majun (F)
2015-11-04 9:03 ` Marc Zyngier
2015-11-05 8:25 ` Gabriele Paoloni
2015-11-05 9:35 ` Marc Zyngier
2015-11-05 9:43 ` Gabriele Paoloni
2015-10-15 15:46 ` [PATCH RFC 0/7] Adding core support for wire-MSI bridges Arnd Bergmann
2015-10-15 16:01 ` Marc Zyngier
2015-10-15 19:16 ` Arnd Bergmann
2015-10-16 8:03 ` Marc Zyngier
2015-10-16 8:45 ` Arnd Bergmann
2015-10-16 1:55 ` Jiang Liu
2015-10-16 8:48 ` Marc Zyngier
2015-11-04 13:34 ` Thomas Gleixner
2015-11-05 12:22 ` Marc Zyngier
2015-11-05 12:25 ` Thomas Gleixner
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