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authorPrarit Bhargava <prarit@sgi.com>2005-07-06 14:59:44 -0700
committerTony Luck <tony.luck@intel.com>2005-07-06 14:59:44 -0700
commitcb4cb2cb9b0b14bdf2fc7125e099ed7e818cea42 (patch)
tree11e110ce3201e0cbd3e30f1d4a1b0dc6ebe19bfa /include
parentbd53d1270f51c6cfb53b06c8f93fd42327871d6b (diff)
[IA64] hotplug/ia64: SN Hotplug Driver: SN IRQ Fixes
This patch fixes the SN IRQ code such that cpu affinity and Hotplug can modify IRQ values. The sn_irq_info structures are now locked using a RCU lock mechanism to avoid lock contention in the lost interrupt WAR code. Signed-off-by: Prarit Bhargava <prarit@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'include')
-rw-r--r--include/asm-ia64/sn/intr.h6
-rw-r--r--include/asm-ia64/sn/pcidev.h4
2 files changed, 7 insertions, 3 deletions
diff --git a/include/asm-ia64/sn/intr.h b/include/asm-ia64/sn/intr.h
index e51471fb086..e190dd4213d 100644
--- a/include/asm-ia64/sn/intr.h
+++ b/include/asm-ia64/sn/intr.h
@@ -9,6 +9,8 @@
#ifndef _ASM_IA64_SN_INTR_H
#define _ASM_IA64_SN_INTR_H
+#include <linux/rcupdate.h>
+
#define SGI_UART_VECTOR (0xe9)
#define SGI_PCIBR_ERROR (0x33)
@@ -33,7 +35,7 @@
// The SN PROM irq struct
struct sn_irq_info {
- struct sn_irq_info *irq_next; /* sharing irq list */
+ struct sn_irq_info *irq_next; /* deprecated DO NOT USE */
short irq_nasid; /* Nasid IRQ is assigned to */
int irq_slice; /* slice IRQ is assigned to */
int irq_cpuid; /* kernel logical cpuid */
@@ -47,6 +49,8 @@ struct sn_irq_info {
int irq_cookie; /* unique cookie */
int irq_flags; /* flags */
int irq_share_cnt; /* num devices sharing IRQ */
+ struct list_head list; /* list of sn_irq_info structs */
+ struct rcu_head rcu; /* rcu callback list */
};
extern void sn_send_IPI_phys(int, long, int, int);
diff --git a/include/asm-ia64/sn/pcidev.h b/include/asm-ia64/sn/pcidev.h
index ed4031d8081..42aea21ee18 100644
--- a/include/asm-ia64/sn/pcidev.h
+++ b/include/asm-ia64/sn/pcidev.h
@@ -10,8 +10,6 @@
#include <linux/pci.h>
-extern struct sn_irq_info **sn_irq;
-
#define SN_PCIDEV_INFO(pci_dev) \
((struct pcidev_info *)(pci_dev)->sysdata)
@@ -50,9 +48,11 @@ struct pcidev_info {
struct sn_irq_info *pdi_sn_irq_info;
struct sn_pcibus_provider *pdi_provider; /* sn pci ops */
+ struct pci_dev *host_pci_dev; /* host bus link */
};
extern void sn_irq_fixup(struct pci_dev *pci_dev,
struct sn_irq_info *sn_irq_info);
+extern void sn_irq_lh_init(void);
#endif /* _ASM_IA64_SN_PCI_PCIDEV_H */