ff6a17989c
1. Removes the need to walk the IRQ/Device list to determine who triggered the IRQ. 2. Improves scalability (up to several times performance improvement for cases with 10s of devices). 3. Improves UML baseline IO performance for one disk + one NIC use case by up to 10%. 4. Introduces write poll triggered IRQs. 5. Prerequisite for introducing high performance mmesg family of functions in network IO. 6. Fixes RNG shutdown which was leaking a file descriptor Signed-off-by: Anton Ivanov <anton.ivanov@cambridgegreys.com> Signed-off-by: Richard Weinberger <richard@nod.at>
40 lines
761 B
C
40 lines
761 B
C
/*
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* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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* Licensed under the GPL
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*/
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#ifndef __IRQ_USER_H__
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#define __IRQ_USER_H__
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#include <sysdep/ptrace.h>
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#include <stdbool.h>
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struct irq_fd {
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struct irq_fd *next;
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void *id;
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int fd;
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int type;
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int irq;
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int events;
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bool active;
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bool pending;
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bool purge;
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};
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#define IRQ_READ 0
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#define IRQ_WRITE 1
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#define IRQ_NONE 2
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#define MAX_IRQ_TYPE (IRQ_NONE + 1)
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struct siginfo;
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extern void sigio_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs);
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extern void free_irq_by_fd(int fd);
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extern void reactivate_fd(int fd, int irqnum);
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extern void deactivate_fd(int fd, int irqnum);
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extern int deactivate_all_fds(void);
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extern int activate_ipi(int fd, int pid);
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#endif
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