From cb4cb2cb9b0b14bdf2fc7125e099ed7e818cea42 Mon Sep 17 00:00:00 2001 From: Prarit Bhargava Date: Wed, 6 Jul 2005 14:59:44 -0700 Subject: [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 Signed-off-by: Tony Luck --- include/asm-ia64/sn/intr.h | 6 +++++- include/asm-ia64/sn/pcidev.h | 4 ++-- 2 files changed, 7 insertions(+), 3 deletions(-) (limited to 'include/asm-ia64') 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 @@ #ifndef _ASM_IA64_SN_INTR_H #define _ASM_IA64_SN_INTR_H +#include + #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 ed4031d80811..42aea21ee187 100644 --- a/include/asm-ia64/sn/pcidev.h +++ b/include/asm-ia64/sn/pcidev.h @@ -10,8 +10,6 @@ #include -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 */ -- cgit v1.2.3