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/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*/
#ifndef __PRESTO_PSDEV_H
#define __PRESTO_PSDEV_H
#define MAX_CHANNEL 16
#define PROCNAME_SIZE 32
#include <linux/locks.h>
#include <linux/smp_lock.h>
#include <linux/version.h>
/* represents state of an instance reached with /dev/intermezzo */
/* communication pending & processing queues */
struct upc_channel {
unsigned int uc_seq;
wait_queue_head_t uc_waitq; /* Lento wait queue */
struct list_head uc_pending;
struct list_head uc_processing;
spinlock_t uc_lock;
int uc_pid; /* Lento's pid */
int uc_hard; /* allows signals during upcalls */
int uc_no_filter;
int uc_no_journal;
int uc_no_upcall;
int uc_timeout; /* . sec: signals will dequeue upc */
long uc_errorval; /* for testing I/O failures */
struct list_head uc_cache_list;
int uc_minor;
};
#define ISLENTO(minor) (current->pid == izo_channels[minor].uc_pid \
|| current->p_pptr->pid == izo_channels[minor].uc_pid \
|| current->p_pptr->p_pptr->pid == izo_channels[minor].uc_pid)
extern struct upc_channel izo_channels[MAX_CHANNEL];
/* message types between presto filesystem in kernel */
#define REQ_READ 1
#define REQ_WRITE 2
#define REQ_ASYNC 4
#define REQ_DEAD 8
struct upc_req {
struct list_head rq_chain;
caddr_t rq_data;
int rq_flags;
int rq_bufsize;
int rq_rep_size;
int rq_opcode; /* copied from data to save lookup */
int rq_unique;
wait_queue_head_t rq_sleep; /* process' wait queue */
unsigned long rq_posttime;
};
#endif
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