Commit-ID: 82ebe4e0c0d6ce8ef20cac67ef4ce4b46b9e219b Gitweb: http://git.kernel.org/tip/82ebe4e0c0d6ce8ef20cac67ef4ce4b46b9e219b Author: Jiang Liu <jiang....@linux.intel.com> AuthorDate: Tue, 25 Nov 2014 13:53:28 +0800 Committer: Thomas Gleixner <t...@linutronix.de> CommitDate: Wed, 26 Nov 2014 18:59:25 +0100
iommu/vt-d: Refine the interfaces to create IRQ for DMAR unit Refine the interfaces to create IRQ for DMAR unit. It's a preparation for converting DMAR IRQ to hierarchy irqdomain on x86. It also moves dmar_alloc_hwirq()/dmar_free_hwirq() from irq_remapping.h to dmar.h. They are not irq_remapping specific. Signed-off-by: Jiang Liu <jiang....@linux.intel.com> Cc: Konrad Rzeszutek Wilk <konrad.w...@oracle.com> Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org> Cc: io...@lists.linux-foundation.org Cc: Bjorn Helgaas <bhelg...@google.com> Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org> Cc: Rafael J. Wysocki <r...@rjwysocki.net> Cc: Randy Dunlap <rdun...@infradead.org> Cc: Yinghai Lu <ying...@kernel.org> Cc: Borislav Petkov <b...@alien8.de> Cc: Tony Luck <tony.l...@intel.com> Cc: Fenghua Yu <fenghua...@intel.com> Cc: Joerg Roedel <j...@8bytes.org> Cc: Vinod Koul <vinod.k...@intel.com> Link: http://lkml.kernel.org/r/1416894816-23245-20-git-send-email-jiang....@linux.intel.com Signed-off-by: Thomas Gleixner <t...@linutronix.de> --- arch/ia64/include/asm/irq_remapping.h | 2 -- arch/ia64/kernel/msi_ia64.c | 30 +++++++++++++++++++----------- arch/x86/include/asm/irq_remapping.h | 4 ---- arch/x86/kernel/apic/msi.c | 24 +++++++++++++----------- drivers/iommu/dmar.c | 19 +++++-------------- include/linux/dmar.h | 3 ++- 6 files changed, 39 insertions(+), 43 deletions(-) diff --git a/arch/ia64/include/asm/irq_remapping.h b/arch/ia64/include/asm/irq_remapping.h index e3b3556..a8687b1 100644 --- a/arch/ia64/include/asm/irq_remapping.h +++ b/arch/ia64/include/asm/irq_remapping.h @@ -1,6 +1,4 @@ #ifndef __IA64_INTR_REMAPPING_H #define __IA64_INTR_REMAPPING_H #define irq_remapping_enabled 0 -#define dmar_alloc_hwirq create_irq -#define dmar_free_hwirq destroy_irq #endif diff --git a/arch/ia64/kernel/msi_ia64.c b/arch/ia64/kernel/msi_ia64.c index 8ae36ea..3f6b761 100644 --- a/arch/ia64/kernel/msi_ia64.c +++ b/arch/ia64/kernel/msi_ia64.c @@ -166,7 +166,7 @@ static struct irq_chip dmar_msi_type = { .irq_retrigger = ia64_msi_retrigger_irq, }; -static int +static void msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_msg *msg) { struct irq_cfg *cfg = irq_cfg + irq; @@ -188,21 +188,29 @@ msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_msg *msg) MSI_DATA_LEVEL_ASSERT | MSI_DATA_DELIVERY_FIXED | MSI_DATA_VECTOR(cfg->vector); - return 0; } -int arch_setup_dmar_msi(unsigned int irq) +int dmar_alloc_hwirq(int id, int node, void *arg) { - int ret; + int irq; struct msi_msg msg; - ret = msi_compose_msg(NULL, irq, &msg); - if (ret < 0) - return ret; - dmar_msi_write(irq, &msg); - irq_set_chip_and_handler_name(irq, &dmar_msi_type, handle_edge_irq, - "edge"); - return 0; + irq = create_irq(); + if (irq > 0) { + irq_set_handler_data(irq, arg); + irq_set_chip_and_handler_name(irq, &dmar_msi_type, + handle_edge_irq, "edge"); + msi_compose_msg(NULL, irq, &msg); + dmar_msi_write(irq, &msg); + } + + return irq; +} + +void dmar_free_hwirq(int irq) +{ + irq_set_handler_data(irq, NULL); + destroy_irq(irq); } #endif /* CONFIG_INTEL_IOMMU */ diff --git a/arch/x86/include/asm/irq_remapping.h b/arch/x86/include/asm/irq_remapping.h index 9c39650..82507c5 100644 --- a/arch/x86/include/asm/irq_remapping.h +++ b/arch/x86/include/asm/irq_remapping.h @@ -121,8 +121,4 @@ irq_remapping_get_irq_domain(struct irq_alloc_info *info) #define irq_remapping_print_chip NULL #endif /* CONFIG_IRQ_REMAP */ - -extern int dmar_alloc_hwirq(void); -extern void dmar_free_hwirq(int irq); - #endif /* __X86_IRQ_REMAPPING_H */ diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c index afaaa11..695c82b 100644 --- a/arch/x86/kernel/apic/msi.c +++ b/arch/x86/kernel/apic/msi.c @@ -228,25 +228,27 @@ static struct irq_chip dmar_msi_type = { .flags = IRQCHIP_SKIP_SET_WAKE, }; -int arch_setup_dmar_msi(unsigned int irq) +int dmar_alloc_hwirq(int id, int node, void *arg) { + int irq; struct msi_msg msg; - struct irq_cfg *cfg = irq_cfg(irq); - native_compose_msi_msg(cfg, &msg); - dmar_msi_write(irq, &msg); - irq_set_chip_and_handler_name(irq, &dmar_msi_type, handle_edge_irq, - "edge"); - return 0; -} + irq = irq_domain_alloc_irqs(NULL, 1, node, NULL); + if (irq > 0) { + irq_set_handler_data(irq, arg); + irq_set_chip_and_handler_name(irq, &dmar_msi_type, + handle_edge_irq, "edge"); + native_compose_msi_msg(irq_cfg(irq), &msg); + dmar_msi_write(irq, &msg); + } -int dmar_alloc_hwirq(void) -{ - return irq_domain_alloc_irqs(NULL, 1, NUMA_NO_NODE, NULL); + return irq; } void dmar_free_hwirq(int irq) { + irq_set_handler_data(irq, NULL); + irq_set_handler(irq, NULL); irq_domain_free_irqs(irq, 1); } #endif diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c index 9847613..536f2d8 100644 --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -1087,8 +1087,8 @@ static void free_iommu(struct intel_iommu *iommu) if (iommu->irq) { free_irq(iommu->irq, iommu); - irq_set_handler_data(iommu->irq, NULL); dmar_free_hwirq(iommu->irq); + iommu->irq = 0; } if (iommu->qi) { @@ -1642,23 +1642,14 @@ int dmar_set_interrupt(struct intel_iommu *iommu) if (iommu->irq) return 0; - irq = dmar_alloc_hwirq(); - if (irq <= 0) { + irq = dmar_alloc_hwirq(iommu->seq_id, iommu->node, iommu); + if (irq > 0) { + iommu->irq = irq; + } else { pr_err("IOMMU: no free vectors\n"); return -EINVAL; } - irq_set_handler_data(irq, iommu); - iommu->irq = irq; - - ret = arch_setup_dmar_msi(irq); - if (ret) { - irq_set_handler_data(irq, NULL); - iommu->irq = 0; - dmar_free_hwirq(irq); - return ret; - } - ret = request_irq(irq, dmar_fault, IRQF_NO_THREAD, iommu->name, iommu); if (ret) pr_err("IOMMU: can't request irq\n"); diff --git a/include/linux/dmar.h b/include/linux/dmar.h index 3062495..8473756 100644 --- a/include/linux/dmar.h +++ b/include/linux/dmar.h @@ -227,6 +227,7 @@ extern void dmar_msi_read(int irq, struct msi_msg *msg); extern void dmar_msi_write(int irq, struct msi_msg *msg); extern int dmar_set_interrupt(struct intel_iommu *iommu); extern irqreturn_t dmar_fault(int irq, void *dev_id); -extern int arch_setup_dmar_msi(unsigned int irq); +extern int dmar_alloc_hwirq(int id, int node, void *arg); +extern void dmar_free_hwirq(int irq); #endif /* __DMAR_H__ */ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
