linux-kernel - [tip:x86/apic] x86, PCI/MSI: Simplify the way to deal with remapped MSI interrupts

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Message-ID: <tip-7fa48d748b0871b91263b57a0ca119a7e972d29a@git.kernel.org>
Date:	Wed, 26 Nov 2014 15:11:51 -0800
From:	tip-bot for Jiang Liu <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	hpa@...or.com, bp@...en8.de, rdunlap@...radead.org,
	mingo@...nel.org, gregkh@...uxfoundation.org, tony.luck@...el.com,
	joro@...tes.org, konrad.wilk@...cle.com, bhelgaas@...gle.com,
	rjw@...ysocki.net, jiang.liu@...ux.intel.com,
	benh@...nel.crashing.org, tglx@...utronix.de,
	linux-kernel@...r.kernel.org, yinghai@...nel.org
Subject: [tip:x86/apic] x86, PCI/MSI:
  Simplify the way to deal with remapped MSI interrupts

Commit-ID:  7fa48d748b0871b91263b57a0ca119a7e972d29a
Gitweb:     http://git.kernel.org/tip/7fa48d748b0871b91263b57a0ca119a7e972d29a
Author:     Jiang Liu <jiang.liu@...ux.intel.com>
AuthorDate: Tue, 25 Nov 2014 13:53:33 +0800
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Wed, 26 Nov 2014 18:59:26 +0100

x86, PCI/MSI: Simplify the way to deal with remapped MSI interrupts

Simplify the way to deal with remapped MSI interrupts, so we could
kill irq_chip.irq_print_chip later.

Signed-off-by: Jiang Liu <jiang.liu@...ux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc: Tony Luck <tony.luck@...el.com>
Cc: Joerg Roedel <joro@...tes.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Rafael J. Wysocki <rjw@...ysocki.net>
Cc: Randy Dunlap <rdunlap@...radead.org>
Cc: Yinghai Lu <yinghai@...nel.org>
Cc: Borislav Petkov <bp@...en8.de>
Link: http://lkml.kernel.org/r/1416894816-23245-25-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 arch/x86/kernel/apic/msi.c | 28 ++++++++++++++++++++++++----
 1 file changed, 24 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c
index 2bf1348..8e8f243 100644
--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -77,7 +77,6 @@ static struct irq_chip pci_msi_controller = {
 	.irq_ack		= irq_chip_ack_parent,
 	.irq_set_affinity	= msi_domain_set_affinity,
 	.irq_retrigger		= irq_chip_retrigger_hierarchy,
-	.irq_print_chip		= irq_remapping_print_chip,
 	.irq_compose_msi_msg	= irq_msi_compose_msg,
 	.irq_write_msi_msg	= pci_msi_domain_write_msg,
 	.flags			= IRQCHIP_SKIP_SET_WAKE,
@@ -143,7 +142,7 @@ static struct msi_domain_ops pci_msi_domain_ops = {
 
 static struct msi_domain_info pci_msi_domain_info = {
 	.flags		= MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
-			  MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX,
+			  MSI_FLAG_PCI_MSIX,
 	.ops		= &pci_msi_domain_ops,
 	.chip		= &pci_msi_controller,
 	.handler	= handle_edge_irq,
@@ -162,9 +161,29 @@ void arch_init_msi_domain(struct irq_domain *parent)
 }
 
 #ifdef CONFIG_IRQ_REMAP
+static struct irq_chip pci_msi_ir_controller = {
+	.name			= "IR-PCI-MSI",
+	.irq_unmask		= pci_msi_unmask_irq,
+	.irq_mask		= pci_msi_mask_irq,
+	.irq_ack		= irq_chip_ack_parent,
+	.irq_set_affinity	= msi_domain_set_affinity,
+	.irq_retrigger		= irq_chip_retrigger_hierarchy,
+	.irq_write_msi_msg	= pci_msi_domain_write_msg,
+	.flags			= IRQCHIP_SKIP_SET_WAKE,
+};
+
+static struct msi_domain_info pci_msi_ir_domain_info = {
+	.flags		= MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
+			  MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX,
+	.ops		= &pci_msi_domain_ops,
+	.chip		= &pci_msi_ir_controller,
+	.handler	= handle_edge_irq,
+	.handler_name	= "edge",
+};
+
 struct irq_domain *arch_create_msi_irq_domain(struct irq_domain *parent)
 {
-	return msi_create_irq_domain(NULL, &pci_msi_domain_info, parent);
+	return pci_msi_create_irq_domain(NULL, &pci_msi_ir_domain_info, parent);
 }
 #endif
 
@@ -325,7 +344,6 @@ static struct irq_chip hpet_msi_controller = {
 	.irq_ack = irq_chip_ack_parent,
 	.irq_set_affinity = hpet_msi_set_affinity,
 	.irq_retrigger = irq_chip_retrigger_hierarchy,
-	.irq_print_chip = irq_remapping_print_chip,
 	.irq_compose_msi_msg = irq_msi_compose_msg,
 	.flags = IRQCHIP_SKIP_SET_WAKE,
 };
@@ -402,6 +420,8 @@ struct irq_domain *hpet_create_irq_domain(int hpet_id)
 	parent = irq_remapping_get_ir_irq_domain(&info);
 	if (parent == NULL)
 		parent = x86_vector_domain;
+	else
+		hpet_msi_controller.name = "IR-HPET-MSI";
 
 	return irq_domain_add_hierarchy(parent, 0, 0, NULL, &hpet_domain_ops,
 					(void *)(long)hpet_id);
--
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