From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030679AbbJ3VMI (ORCPT ); Fri, 30 Oct 2015 17:12:08 -0400 Received: from o1.f.az.sendgrid.net ([208.117.55.132]:2856 "EHLO o1.f.az.sendgrid.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932943AbbJ3VMD (ORCPT ); Fri, 30 Oct 2015 17:12:03 -0400 From: jakeo@microsoft.com To: gregkh@linuxfoundation.org, kys@microsoft.com, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, olaf@aepfle.de, apw@canonical.com, vkuznets@redhat.com, tglx@redhat.com, haiyangz@microsoft.com, marc.zyngier@arm.com, bhelgaas@google.com, linux-pci@vger.kernel.org Cc: Jake Oshins Subject: [PATCH v5 3/7] PCI: Make it possible to implement a PCI MSI IRQ Domain in a module. Date: Fri, 30 Oct 2015 21:11:11 +0000 Message-Id: <1446239475-49480-4-git-send-email-jakeo@microsoft.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1446239475-49480-1-git-send-email-jakeo@microsoft.com> References: <1446239475-49480-1-git-send-email-jakeo@microsoft.com> X-SG-EID: UsLXQ589HNP4HLBydmD9pgHURQozLYm9XliudupI8YuaCvISns+AAQJIkIwdR/2J+7QXo5o4L2Y/9T 2zuZep+yA3mrSgnRKIHg9/tmVsnGhsrQoqfcqODEAk2wTWPgfeCCNX/Sdu3Lv+Ep27Cm+dlytQRkhy 4FOPJkLexqLMophSyR5YELT0HzSReaJ2YMPl Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jake Oshins The Linux kernel already has the concpet of IRQ domain, whereing a component can expose a set of IRQs which are managed by a particular interrupt controller chip or other subsystem. The PCI driver exposes the notion of an IRQ domain for Message-Signaled Interrupts (MSI) from PCI Express devices. This patch exposes the functions which are necessary for making an MSI IRQ domain within a module. Signed-off-by: Jake Oshins --- arch/x86/include/asm/msi.h | 4 ++++ arch/x86/kernel/apic/msi.c | 5 +++-- arch/x86/kernel/apic/vector.c | 2 ++ drivers/pci/msi.c | 4 ++++ kernel/irq/chip.c | 1 + kernel/irq/irqdomain.c | 2 ++ 6 files changed, 16 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/msi.h b/arch/x86/include/asm/msi.h index 93724cc..e8b7924 100644 --- a/arch/x86/include/asm/msi.h +++ b/arch/x86/include/asm/msi.h @@ -1,7 +1,11 @@ #ifndef _ASM_X86_MSI_H #define _ASM_X86_MSI_H #include +#include typedef struct irq_alloc_info msi_alloc_info_t; +int pci_msi_prepare(struct irq_domain *domain, struct device *dev, int nvec, + msi_alloc_info_t *arg); + #endif /* _ASM_X86_MSI_H */ diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c index 5f1feb6..bdb28fc 100644 --- a/arch/x86/kernel/apic/msi.c +++ b/arch/x86/kernel/apic/msi.c @@ -96,8 +96,8 @@ static irq_hw_number_t pci_msi_get_hwirq(struct msi_domain_info *info, return arg->msi_hwirq; } -static int pci_msi_prepare(struct irq_domain *domain, struct device *dev, - int nvec, msi_alloc_info_t *arg) +int pci_msi_prepare(struct irq_domain *domain, struct device *dev, int nvec, + msi_alloc_info_t *arg) { struct pci_dev *pdev = to_pci_dev(dev); struct msi_desc *desc = first_pci_msi_entry(pdev); @@ -113,6 +113,7 @@ static int pci_msi_prepare(struct irq_domain *domain, struct device *dev, return 0; } +EXPORT_SYMBOL_GPL(pci_msi_prepare); static void pci_msi_set_desc(msi_alloc_info_t *arg, struct msi_desc *desc) { diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c index 836d11b..f3ac5e1 100644 --- a/arch/x86/kernel/apic/vector.c +++ b/arch/x86/kernel/apic/vector.c @@ -29,6 +29,7 @@ struct apic_chip_data { }; struct irq_domain *x86_vector_domain; +EXPORT_SYMBOL_GPL(x86_vector_domain); static DEFINE_RAW_SPINLOCK(vector_lock); static cpumask_var_t vector_cpumask; static struct irq_chip lapic_controller; @@ -66,6 +67,7 @@ struct irq_cfg *irqd_cfg(struct irq_data *irq_data) return data ? &data->cfg : NULL; } +EXPORT_SYMBOL_GPL(irqd_cfg); struct irq_cfg *irq_cfg(unsigned int irq) { diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 53e4632..3915a99 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -257,6 +257,7 @@ void pci_msi_mask_irq(struct irq_data *data) { msi_set_mask_bit(data, 1); } +EXPORT_SYMBOL_GPL(pci_msi_mask_irq); /** * pci_msi_unmask_irq - Generic irq chip callback to unmask PCI/MSI interrupts @@ -266,6 +267,7 @@ void pci_msi_unmask_irq(struct irq_data *data) { msi_set_mask_bit(data, 0); } +EXPORT_SYMBOL_GPL(pci_msi_unmask_irq); void default_restore_msi_irqs(struct pci_dev *dev) { @@ -1126,6 +1128,7 @@ struct pci_dev *msi_desc_to_pci_dev(struct msi_desc *desc) { return to_pci_dev(desc->dev); } +EXPORT_SYMBOL(msi_desc_to_pci_dev); void *msi_desc_to_pci_sysdata(struct msi_desc *desc) { @@ -1285,6 +1288,7 @@ struct irq_domain *pci_msi_create_irq_domain(struct fwnode_handle *fwnode, domain->bus_token = DOMAIN_BUS_PCI_MSI; return domain; } +EXPORT_SYMBOL_GPL(pci_msi_create_irq_domain); /** * pci_msi_domain_alloc_irqs - Allocate interrupts for @dev in @domain diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 1520645..2414775 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -950,6 +950,7 @@ void irq_chip_ack_parent(struct irq_data *data) data = data->parent_data; data->chip->irq_ack(data); } +EXPORT_SYMBOL_GPL(irq_chip_ack_parent); /** * irq_chip_mask_parent - Mask the parent interrupt diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index 22aa961..174d7e0 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -60,6 +60,7 @@ struct fwnode_handle *irq_domain_alloc_fwnode(void *data) fwid->fwnode.type = FWNODE_IRQCHIP; return &fwid->fwnode; } +EXPORT_SYMBOL_GPL(irq_domain_alloc_fwnode); /** * irq_domain_free_fwnode - Free a non-OF-backed fwnode_handle @@ -77,6 +78,7 @@ void irq_domain_free_fwnode(struct fwnode_handle *fwnode) kfree(fwid->name); kfree(fwid); } +EXPORT_SYMBOL_GPL(irq_domain_free_fwnode); /** * __irq_domain_add() - Allocate a new irq_domain data structure -- 1.9.1