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authorPrarit Bhargava <prarit@sgi.com>2005-07-06 17:59:44 -0400
committerTony Luck <tony.luck@intel.com>2005-07-06 17:59:44 -0400
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 e51471fb0867..e190dd4213d5 100644
--- a/include/asm-ia64/sn/intr.h
+++ b/include/asm-ia64/sn/intr.h
@@ -9,6 +9,8 @@
9#ifndef _ASM_IA64_SN_INTR_H 9#ifndef _ASM_IA64_SN_INTR_H
10#define _ASM_IA64_SN_INTR_H 10#define _ASM_IA64_SN_INTR_H
11 11
12#include <linux/rcupdate.h>
13
12#define SGI_UART_VECTOR (0xe9) 14#define SGI_UART_VECTOR (0xe9)
13#define SGI_PCIBR_ERROR (0x33) 15#define SGI_PCIBR_ERROR (0x33)
14 16
@@ -33,7 +35,7 @@
33 35
34// The SN PROM irq struct 36// The SN PROM irq struct
35struct sn_irq_info { 37struct sn_irq_info {
36 struct sn_irq_info *irq_next; /* sharing irq list */ 38 struct sn_irq_info *irq_next; /* deprecated DO NOT USE */
37 short irq_nasid; /* Nasid IRQ is assigned to */ 39 short irq_nasid; /* Nasid IRQ is assigned to */
38 int irq_slice; /* slice IRQ is assigned to */ 40 int irq_slice; /* slice IRQ is assigned to */
39 int irq_cpuid; /* kernel logical cpuid */ 41 int irq_cpuid; /* kernel logical cpuid */
@@ -47,6 +49,8 @@ struct sn_irq_info {
47 int irq_cookie; /* unique cookie */ 49 int irq_cookie; /* unique cookie */
48 int irq_flags; /* flags */ 50 int irq_flags; /* flags */
49 int irq_share_cnt; /* num devices sharing IRQ */ 51 int irq_share_cnt; /* num devices sharing IRQ */
52 struct list_head list; /* list of sn_irq_info structs */
53 struct rcu_head rcu; /* rcu callback list */
50}; 54};
51 55
52extern void sn_send_IPI_phys(int, long, int, int); 56extern 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 ed4031d80811..42aea21ee187 100644
--- a/include/asm-ia64/sn/pcidev.h
+++ b/include/asm-ia64/sn/pcidev.h
@@ -10,8 +10,6 @@
10 10
11#include <linux/pci.h> 11#include <linux/pci.h>
12 12
13extern struct sn_irq_info **sn_irq;
14
15#define SN_PCIDEV_INFO(pci_dev) \ 13#define SN_PCIDEV_INFO(pci_dev) \
16 ((struct pcidev_info *)(pci_dev)->sysdata) 14 ((struct pcidev_info *)(pci_dev)->sysdata)
17 15
@@ -50,9 +48,11 @@ struct pcidev_info {
50 48
51 struct sn_irq_info *pdi_sn_irq_info; 49 struct sn_irq_info *pdi_sn_irq_info;
52 struct sn_pcibus_provider *pdi_provider; /* sn pci ops */ 50 struct sn_pcibus_provider *pdi_provider; /* sn pci ops */
51 struct pci_dev *host_pci_dev; /* host bus link */
53}; 52};
54 53
55extern void sn_irq_fixup(struct pci_dev *pci_dev, 54extern void sn_irq_fixup(struct pci_dev *pci_dev,
56 struct sn_irq_info *sn_irq_info); 55 struct sn_irq_info *sn_irq_info);
57 56
57extern void sn_irq_lh_init(void);
58#endif /* _ASM_IA64_SN_PCI_PCIDEV_H */ 58#endif /* _ASM_IA64_SN_PCI_PCIDEV_H */