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Date: Wed, 26 Sep 2012 12:44:38 +0200
From: Joerg Roedel <joerg.roedel@....com>
To: <x86@...nel.org>
CC: <linux-kernel@...r.kernel.org>, <joro@...tes.org>,
Suresh Siddha <suresh.b.siddha@...el.com>,
Yinghai Lu <yinghai@...nel.org>,
Sebastian Andrzej Siewior <sebastian@...akpoint.cc>,
Joerg Roedel <joerg.roedel@....com>
Subject: [PATCH 06/19] x86, msi: Use IRQ remapping specific setup_msi_irqs routine
Use seperate routines to setup MSI IRQs for both
irq_remapping_enabled cases.
Signed-off-by: Joerg Roedel <joerg.roedel@....com>
---
arch/x86/include/asm/irq_remapping.h | 12 -------
arch/x86/include/asm/pci.h | 2 ++
arch/x86/kernel/apic/io_apic.c | 26 ++--------------
drivers/iommu/irq_remapping.c | 57 ++++++++++++++++++++++++++++++++--
4 files changed, 59 insertions(+), 38 deletions(-)
diff --git a/arch/x86/include/asm/irq_remapping.h b/arch/x86/include/asm/irq_remapping.h
index 5fb9bbb..0ee1e88 100644
--- a/arch/x86/include/asm/irq_remapping.h
+++ b/arch/x86/include/asm/irq_remapping.h
@@ -47,9 +47,6 @@ extern void free_remapped_irq(int irq);
extern void compose_remapped_msi_msg(struct pci_dev *pdev,
unsigned int irq, unsigned int dest,
struct msi_msg *msg, u8 hpet_id);
-extern int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec);
-extern int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq,
- int index, int sub_handle);
extern int setup_hpet_msi_remapped(unsigned int irq, unsigned int id);
#else /* CONFIG_IRQ_REMAP */
@@ -83,15 +80,6 @@ static inline void compose_remapped_msi_msg(struct pci_dev *pdev,
struct msi_msg *msg, u8 hpet_id)
{
}
-static inline int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec)
-{
- return -ENODEV;
-}
-static inline int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq,
- int index, int sub_handle)
-{
- return -ENODEV;
-}
static inline int setup_hpet_msi_remapped(unsigned int irq, unsigned int id)
{
return -ENODEV;
diff --git a/arch/x86/include/asm/pci.h b/arch/x86/include/asm/pci.h
index df75d07..1470b53 100644
--- a/arch/x86/include/asm/pci.h
+++ b/arch/x86/include/asm/pci.h
@@ -121,9 +121,11 @@ static inline void x86_restore_msi_irqs(struct pci_dev *dev, int irq)
#define arch_teardown_msi_irq x86_teardown_msi_irq
#define arch_restore_msi_irqs x86_restore_msi_irqs
/* implemented in arch/x86/kernel/apic/io_apic. */
+struct msi_desc;
int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
void native_teardown_msi_irq(unsigned int irq);
void native_restore_msi_irqs(struct pci_dev *dev, int irq);
+int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, int irq);
/* default to the implementation in drivers/lib/msi.c */
#define HAVE_DEFAULT_MSI_TEARDOWN_IRQS
#define HAVE_DEFAULT_MSI_RESTORE_IRQS
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index ab07371..5ae0292 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -3145,7 +3145,7 @@ static struct irq_chip msi_chip = {
.irq_retrigger = ioapic_retrigger_irq,
};
-static int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, int irq)
+int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, int irq)
{
struct irq_chip *chip = &msi_chip;
struct msi_msg msg;
@@ -3172,9 +3172,9 @@ static int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, int irq)
int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
{
- int node, ret, sub_handle, index = 0;
unsigned int irq, irq_want;
struct msi_desc *msidesc;
+ int node, ret;
/* x86 doesn't support multiple MSI yet */
if (type == PCI_CAP_ID_MSI && nvec > 1)
@@ -3182,36 +3182,16 @@ int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
node = dev_to_node(&dev->dev);
irq_want = nr_irqs_gsi;
- sub_handle = 0;
list_for_each_entry(msidesc, &dev->msi_list, list) {
irq = create_irq_nr(irq_want, node);
if (irq == 0)
return -1;
+
irq_want = irq + 1;
- if (!irq_remapping_enabled)
- goto no_ir;
- if (!sub_handle) {
- /*
- * allocate the consecutive block of IRTE's
- * for 'nvec'
- */
- index = msi_alloc_remapped_irq(dev, irq, nvec);
- if (index < 0) {
- ret = index;
- goto error;
- }
- } else {
- ret = msi_setup_remapped_irq(dev, irq, index,
- sub_handle);
- if (ret < 0)
- goto error;
- }
-no_ir:
ret = setup_msi_irq(dev, msidesc, irq);
if (ret < 0)
goto error;
- sub_handle++;
}
return 0;
diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
index f439151..984104b 100644
--- a/drivers/iommu/irq_remapping.c
+++ b/drivers/iommu/irq_remapping.c
@@ -4,6 +4,8 @@
#include <linux/cpumask.h>
#include <linux/errno.h>
#include <linux/msi.h>
+#include <linux/irq.h>
+#include <linux/pci.h>
#include <asm/hw_irq.h>
#include <asm/irq_remapping.h>
@@ -21,6 +23,10 @@ int no_x2apic_optout;
static struct irq_remap_ops *remap_ops;
+static int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec);
+static int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq,
+ int index, int sub_handle);
+
static void irq_remapping_disable_io_apic(void)
{
/*
@@ -34,9 +40,54 @@ static void irq_remapping_disable_io_apic(void)
disconnect_bsp_APIC(0);
}
+static int irq_remapping_setup_msi_irqs(struct pci_dev *dev,
+ int nvec, int type)
+{
+ int node, ret, sub_handle, index = 0;
+ struct msi_desc *msidesc;
+ unsigned int irq;
+
+ /* We don't support multiple MSI yet */
+ if (type == PCI_CAP_ID_MSI && nvec > 1)
+ return 1;
+
+ node = dev_to_node(&dev->dev);
+ irq = get_nr_irqs_gsi();
+ sub_handle = 0;
+
+ list_for_each_entry(msidesc, &dev->msi_list, list) {
+
+ irq = create_irq_nr(irq, node);
+ if (irq == 0)
+ return -1;
+
+ if (sub_handle == 0)
+ ret = index = msi_alloc_remapped_irq(dev, irq, nvec);
+ else
+ ret = msi_setup_remapped_irq(dev, irq, index, sub_handle);
+
+ if (ret < 0)
+ goto error;
+
+ ret = setup_msi_irq(dev, msidesc, irq);
+ if (ret < 0)
+ goto error;
+
+ sub_handle += 1;
+ irq += 1;
+ }
+
+ return 0;
+
+error:
+ destroy_irq(irq);
+ return ret;
+}
+
static void __init irq_remapping_modify_x86_ops(void)
{
x86_io_apic_ops.disable = irq_remapping_disable_io_apic;
+ x86_msi.setup_msi_irqs = irq_remapping_setup_msi_irqs;
x86_msi.setup_hpet_msi = setup_hpet_msi_remapped;
}
@@ -181,7 +232,7 @@ void compose_remapped_msi_msg(struct pci_dev *pdev,
remap_ops->compose_msi_msg(pdev, irq, dest, msg, hpet_id);
}
-int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec)
+static int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec)
{
if (!remap_ops || !remap_ops->msi_alloc_irq)
return -ENODEV;
@@ -189,8 +240,8 @@ int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec)
return remap_ops->msi_alloc_irq(pdev, irq, nvec);
}
-int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq,
- int index, int sub_handle)
+static int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq,
+ int index, int sub_handle)
{
if (!remap_ops || !remap_ops->msi_setup_irq)
return -ENODEV;
--
1.7.9.5
--
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