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-rw-r--r--arch/x86/pci/xen.c68
-rw-r--r--drivers/xen/events.c30
-rw-r--r--include/xen/events.h4
3 files changed, 43 insertions, 59 deletions
diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c
index 0d5087eeced..93e42152d8d 100644
--- a/arch/x86/pci/xen.c
+++ b/arch/x86/pci/xen.c
@@ -86,7 +86,7 @@ static void xen_msi_compose_msg(struct pci_dev *pdev, unsigned int pirq,
static int xen_hvm_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
{
- int irq, pirq, ret = 0;
+ int irq, pirq;
struct msi_desc *msidesc;
struct msi_msg msg;
@@ -94,39 +94,32 @@ static int xen_hvm_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
__read_msi_msg(msidesc, &msg);
pirq = MSI_ADDR_EXT_DEST_ID(msg.address_hi) |
((msg.address_lo >> MSI_ADDR_DEST_ID_SHIFT) & 0xff);
- if (xen_irq_from_pirq(pirq) >= 0 && msg.data == XEN_PIRQ_MSI_DATA) {
- irq = xen_allocate_pirq_msi((type == PCI_CAP_ID_MSIX) ?
- "msi-x" : "msi", &pirq, 0);
- if (irq < 0)
+ if (msg.data != XEN_PIRQ_MSI_DATA ||
+ xen_irq_from_pirq(pirq) < 0) {
+ pirq = xen_allocate_pirq_msi(dev, msidesc);
+ if (pirq < 0)
goto error;
- ret = set_irq_msi(irq, msidesc);
- if (ret < 0)
- goto error_while;
- printk(KERN_DEBUG "xen: msi already setup: msi --> irq=%d"
- " pirq=%d\n", irq, pirq);
- return 0;
+ xen_msi_compose_msg(dev, pirq, &msg);
+ __write_msi_msg(msidesc, &msg);
+ dev_dbg(&dev->dev, "xen: msi bound to pirq=%d\n", pirq);
+ } else {
+ dev_dbg(&dev->dev,
+ "xen: msi already bound to pirq=%d\n", pirq);
}
- irq = xen_allocate_pirq_msi((type == PCI_CAP_ID_MSIX) ?
- "msi-x" : "msi", &pirq, 1);
- if (irq < 0 || pirq < 0)
+ irq = xen_bind_pirq_msi_to_irq(dev, msidesc, pirq,
+ (type == PCI_CAP_ID_MSIX) ?
+ "msi-x" : "msi");
+ if (irq < 0)
goto error;
- printk(KERN_DEBUG "xen: msi --> irq=%d, pirq=%d\n", irq, pirq);
- xen_msi_compose_msg(dev, pirq, &msg);
- ret = set_irq_msi(irq, msidesc);
- if (ret < 0)
- goto error_while;
- write_msi_msg(irq, &msg);
+ dev_dbg(&dev->dev,
+ "xen: msi --> pirq=%d --> irq=%d\n", pirq, irq);
}
return 0;
-error_while:
- unbind_from_irqhandler(irq, NULL);
error:
- if (ret == -ENODEV)
- dev_err(&dev->dev, "Xen PCI frontend has not registered" \
- " MSI/MSI-X support!\n");
-
- return ret;
+ dev_err(&dev->dev,
+ "Xen PCI frontend has not registered MSI/MSI-X support!\n");
+ return -ENODEV;
}
/*
@@ -152,28 +145,19 @@ static int xen_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
goto error;
i = 0;
list_for_each_entry(msidesc, &dev->msi_list, list) {
- irq = xen_allocate_pirq_msi(
- (type == PCI_CAP_ID_MSIX) ?
- "pcifront-msi-x" : "pcifront-msi",
- &v[i], 0);
- if (irq < 0) {
- ret = -1;
+ irq = xen_bind_pirq_msi_to_irq(dev, msidesc, v[i],
+ (type == PCI_CAP_ID_MSIX) ?
+ "pcifront-msi-x" :
+ "pcifront-msi");
+ if (irq < 0)
goto free;
- }
- ret = set_irq_msi(irq, msidesc);
- if (ret)
- goto error_while;
i++;
}
kfree(v);
return 0;
-error_while:
- unbind_from_irqhandler(irq, NULL);
error:
- if (ret == -ENODEV)
- dev_err(&dev->dev, "Xen PCI frontend has not registered" \
- " MSI/MSI-X support!\n");
+ dev_err(&dev->dev, "Xen PCI frontend has not registered MSI/MSI-X support!\n");
free:
kfree(v);
return ret;
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index c21066fc30b..1033f6284f3 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -647,12 +647,12 @@ out:
#include <linux/msi.h>
#include "../pci/msi.h"
-static int find_unbound_pirq(int type)
+int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc)
{
int rc;
struct physdev_get_free_pirq op_get_free_pirq;
- op_get_free_pirq.type = type;
+ op_get_free_pirq.type = MAP_PIRQ_TYPE_MSI;
rc = HYPERVISOR_physdev_op(PHYSDEVOP_get_free_pirq, &op_get_free_pirq);
WARN_ONCE(rc == -ENOSYS,
@@ -661,9 +661,10 @@ static int find_unbound_pirq(int type)
return rc ? -1 : op_get_free_pirq.pirq;
}
-int xen_allocate_pirq_msi(char *name, int *pirq, int alloc_pirq)
+int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
+ int pirq, const char *name)
{
- int irq;
+ int irq, ret;
spin_lock(&irq_mapping_update_lock);
@@ -671,24 +672,21 @@ int xen_allocate_pirq_msi(char *name, int *pirq, int alloc_pirq)
if (irq == -1)
goto out;
- if (alloc_pirq) {
- *pirq = find_unbound_pirq(MAP_PIRQ_TYPE_MSI);
- if (*pirq == -1) {
- xen_free_irq(irq);
- irq = -1;
- goto out;
- }
- }
-
set_irq_chip_and_handler_name(irq, &xen_pirq_chip,
handle_level_irq, name);
- irq_info[irq] = mk_pirq_info(0, *pirq, 0, 0);
- pirq_to_irq[*pirq] = irq;
-
+ irq_info[irq] = mk_pirq_info(0, pirq, 0, 0);
+ pirq_to_irq[pirq] = irq;
+ ret = set_irq_msi(irq, msidesc);
+ if (ret < 0)
+ goto error_irq;
out:
spin_unlock(&irq_mapping_update_lock);
return irq;
+error_irq:
+ spin_unlock(&irq_mapping_update_lock);
+ xen_free_irq(irq);
+ return -1;
}
int xen_create_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, int type)
diff --git a/include/xen/events.h b/include/xen/events.h
index f70536af921..18bf825bac6 100644
--- a/include/xen/events.h
+++ b/include/xen/events.h
@@ -75,7 +75,9 @@ int xen_allocate_pirq(unsigned gsi, int shareable, char *name);
int xen_map_pirq_gsi(unsigned pirq, unsigned gsi, int shareable, char *name);
#ifdef CONFIG_PCI_MSI
-int xen_allocate_pirq_msi(char *name, int *pirq, int alloc_pirq);
+int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
+int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
+ int pirq, const char *name);
int xen_create_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, int type);
#endif
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-25 12:22:29 +0000