5f92c32936
1) sun4{u,v}_build_msi() have improper return value handling.
We should always return negative error codes, instead of
using the magic value "0" which could in fact be a valid
MSI number.
2) sun4{u,v}_build_msi() should return -ENOMEM instead of
calling prom_prom() halt with kzalloc() of the interrupt
data fails.
3) We 'remembered' the MSI number using a singleton in the
struct device archdata area, this doesn't work for MSI-X
which can cause multiple MSIs assosciated with one device.
Delete that archdata member, and instead store the MSI
number in the IRQ chip data area.
Signed-off-by: David S. Miller <davem@davemloft.net>
85 lines
2.7 KiB
C
85 lines
2.7 KiB
C
/* $Id: irq.h,v 1.21 2002/01/23 11:27:36 davem Exp $
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* irq.h: IRQ registers on the 64-bit Sparc.
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*
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* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
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* Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
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*/
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#ifndef _SPARC64_IRQ_H
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#define _SPARC64_IRQ_H
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#include <linux/linkage.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/interrupt.h>
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#include <asm/pil.h>
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#include <asm/ptrace.h>
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/* IMAP/ICLR register defines */
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#define IMAP_VALID 0x80000000UL /* IRQ Enabled */
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#define IMAP_TID_UPA 0x7c000000UL /* UPA TargetID */
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#define IMAP_TID_JBUS 0x7c000000UL /* JBUS TargetID */
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#define IMAP_TID_SHIFT 26
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#define IMAP_AID_SAFARI 0x7c000000UL /* Safari AgentID */
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#define IMAP_AID_SHIFT 26
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#define IMAP_NID_SAFARI 0x03e00000UL /* Safari NodeID */
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#define IMAP_NID_SHIFT 21
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#define IMAP_IGN 0x000007c0UL /* IRQ Group Number */
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#define IMAP_INO 0x0000003fUL /* IRQ Number */
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#define IMAP_INR 0x000007ffUL /* Full interrupt number*/
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#define ICLR_IDLE 0x00000000UL /* Idle state */
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#define ICLR_TRANSMIT 0x00000001UL /* Transmit state */
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#define ICLR_PENDING 0x00000003UL /* Pending state */
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/* The largest number of unique interrupt sources we support.
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* If this needs to ever be larger than 255, you need to change
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* the type of ino_bucket->virt_irq as appropriate.
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*
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* ino_bucket->virt_irq allocation is made during {sun4v_,}build_irq().
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*/
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#define NR_IRQS 255
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extern void irq_install_pre_handler(int virt_irq,
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void (*func)(unsigned int, void *, void *),
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void *arg1, void *arg2);
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#define irq_canonicalize(irq) (irq)
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extern unsigned int build_irq(int inofixup, unsigned long iclr, unsigned long imap);
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extern unsigned int sun4v_build_irq(u32 devhandle, unsigned int devino);
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extern unsigned int sun4v_build_virq(u32 devhandle, unsigned int devino);
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extern unsigned int sun4v_build_msi(u32 devhandle, unsigned int *virt_irq_p,
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unsigned int msi_devino_start,
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unsigned int msi_devino_end);
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extern void sun4v_destroy_msi(unsigned int virt_irq);
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extern unsigned int sbus_build_irq(void *sbus, unsigned int ino);
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extern void sparc64_set_msi(unsigned int virt_irq, u32 msi);
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extern u32 sparc64_get_msi(unsigned int virt_irq);
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extern void fixup_irqs(void);
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static __inline__ void set_softint(unsigned long bits)
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{
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__asm__ __volatile__("wr %0, 0x0, %%set_softint"
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: /* No outputs */
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: "r" (bits));
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}
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static __inline__ void clear_softint(unsigned long bits)
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{
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__asm__ __volatile__("wr %0, 0x0, %%clear_softint"
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: /* No outputs */
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: "r" (bits));
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}
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static __inline__ unsigned long get_softint(void)
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{
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unsigned long retval;
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__asm__ __volatile__("rd %%softint, %0"
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: "=r" (retval));
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return retval;
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}
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#endif
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