patch-2.3.42 linux/drivers/ap1000/ap.c

• Lines: 308
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.3.41/linux/drivers/ap1000/ap.c
• Orig date: Fri Jan 21 18:19:16 2000

diff -u --recursive --new-file v2.3.41/linux/drivers/ap1000/ap.c linux/drivers/ap1000/ap.c
@@ -1,307 +0,0 @@
-  /*
-   * Copyright 1996 The Australian National University.
-   * Copyright 1996 Fujitsu Laboratories Limited
-   * 
-   * This software may be distributed under the terms of the Gnu
-   * Public License version 2 or later
-  */
-/* 
- * ap.c - Single AP1000 block driver.
- *
- * (C) dwalsh, Pious project, DCS, ANU 1996
- *
- * This block driver is designed to simply to perform
- * io operations to the hosts file system. 
- *
- * Heavily modified by tridge
- *
- */
-
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/fs.h>
-#include <linux/ext2_fs.h>
-#include <linux/kernel.h>
-#include <linux/major.h>
-#include <linux/module.h>
-#include <asm/uaccess.h>
-#include <asm/ap1000/apservice.h>
-
-#define AP_DEBUG 0
-
-#define MAJOR_NR APBLOCK_MAJOR
-#define AP_DRIVER 1
-#include <linux/blk.h>
-
-#define NUM_APDEVS 8
-#define MAX_REQUESTS 1
-
-static DECLARE_WAIT_QUEUE_HEAD(busy_wait);
-
-static int ap_blocksizes[NUM_APDEVS];
-static int ap_length[NUM_APDEVS];
-static int ap_fds[NUM_APDEVS];
-
-#define SECTOR_BLOCK_SHIFT 9
-#define AP_BLOCK_SHIFT 12 /* 4k blocks */
-#define AP_BLOCK_SIZE (1<<AP_BLOCK_SHIFT)
-
-static volatile int request_count = 0;
-
-static void ap_release(struct inode * inode, struct file * filp)
-{
-	MOD_DEC_USE_COUNT;
-}
-
-static void ap_request(request_queue_t * q)
-{
-  struct cap_request creq;
-  unsigned int minor;
-  int offset, len;
-  struct request *req;
-
-  if (request_count >= MAX_REQUESTS) return;
-
-repeat:  
-
-  if (!CURRENT) {
-    return;
-  }
-
-  if (MAJOR(CURRENT->rq_dev) != MAJOR_NR) {
-    panic(DEVICE_NAME ": request list destroyed");
-  }
-  if (CURRENT->bh) {
-    if (!buffer_locked(CURRENT->bh)) {
-      panic(DEVICE_NAME ": block not locked");
-    }
-  }
-
-  req = CURRENT;
-
-  minor = MINOR(req->rq_dev);
-
-  if (minor >= NUM_APDEVS) {
-    printk("apblock: request for invalid minor %d\n",minor);
-    end_request(0);
-    goto repeat;
-  }
-
-  offset = req->sector;
-  len = req->current_nr_sectors;
-
-  if ((offset + len) > ap_length[minor]) {
-    printk("apblock: request for invalid sectors %d -> %d\n",
-	   offset,offset+len);
-    end_request(0);
-    goto repeat;
-  }
-
-  if (ap_fds[minor] == -1) {
-    printk("apblock: minor %d not open\n",minor);
-    end_request(0);
-    goto repeat;
-  }
-
-  /* convert to our units */
-  offset <<= SECTOR_BLOCK_SHIFT;
-  len <<= SECTOR_BLOCK_SHIFT;
-  
-  /* setup a request for the host */
-  creq.cid = mpp_cid();
-  creq.size = sizeof(creq);
-  creq.header = 0;
-  creq.data[0] = (int)(req);
-  creq.data[1] = ap_fds[minor];
-  creq.data[2] = offset;
-  creq.data[3] = len;
-
-  switch (req->cmd) {
-  case READ:
-#if AP_DEBUG
-    printk("apblock: read req=0x%x len=%d offset=%d\n",
-	   req,len,offset);
-#endif
-    creq.type = REQ_BREAD;
-    if (bif_queue(&creq,0,0)) {
-      return;
-    }
-    break;
-
-  case WRITE:
-#if AP_DEBUG
-    printk("apblock: write req=0x%x len=%d offset=%d\n",
-	   req,len,offset);
-#endif
-    creq.type = REQ_BWRITE;
-    creq.size += len;
-    if (bif_queue_nocopy(&creq,req->buffer,creq.size - sizeof(creq))) {
-      return;
-    }
-    break;
-
-  default:
-    printk("apblock: unknown ap op %d\n",req->cmd);
-    end_request(0);
-    return;
-  }
-
-  if (++request_count < MAX_REQUESTS)
-    goto repeat;
-}
-
-/* this is called by ap1000/bif.c when a read/write has completed */
-void ap_complete(struct cap_request *creq)
-{  
-#if AP_DEBUG
-  struct request *req = (struct request *)(creq->data[0]);
-
-  printk("request 0x%x complete\n",req);
-#endif
-  end_request(1);
-  request_count--;
-  ap_request(NULL);
-}
-
-
-/* this is called by ap1000/bif.c to find a buffer to put a BREAD into 
- using DMA */
-char *ap_buffer(struct cap_request *creq)
-{  
-  struct request *req = (struct request *)(creq->data[0]);
-
-  return(req->buffer);
-}
-
-
-static int ap_open(struct inode * inode, struct file * filp)
-{
-  struct cap_request creq;
-  int minor;
-  minor =  DEVICE_NR(inode->i_rdev);
-  
-#if AP_DEBUG
-  printk("ap_open: minor=%x\n", minor);
-#endif
-
-  if (minor >= NUM_APDEVS)
-    return -ENODEV;
-
-  /* if its already open then don't do anything */
-  if (ap_fds[minor] != -1)
-    return 0;
-
-  /* send the open request to the front end */
-  creq.cid = mpp_cid();
-  creq.type = REQ_BOPEN;
-  creq.header = 0;
-  creq.size = sizeof(creq);
-  creq.data[0] = minor;
-
-  bif_queue(&creq,0,0);
-
-  /* wait for the reply */
-  while (ap_fds[minor] == -1)
-    sleep_on(&busy_wait);
-
-  return 0;
-}
-
-
-static int ap_ioctl(struct inode *inode, struct file *file, 
-		    unsigned int cmd, unsigned long arg)
-{
-	if (!inode || !inode->i_rdev) 	
-		return -EINVAL;
-
-	switch (cmd) {
-	case BLKGETSIZE:   /* Return device size */
-		if (put_user(ap_length[MINOR(inode->i_rdev)],(long *) arg))
-			return -EFAULT;
-		return 0;
-    
-	default:
-		break;
-	};
-	
-	return 0;
-}
-
-
-/* this is called by ap1000/bif.c when a open reply comes in */
-void ap_open_reply(struct cap_request *creq)
-{
-  int minor = creq->data[0];
-
-  ap_fds[minor] = creq->data[1];
-  ap_length[minor] = creq->data[2] >> SECTOR_BLOCK_SHIFT;
-
-#if AP_DEBUG
-  printk("ap opened minor %d length=%d fd=%d\n",
-	 minor,ap_length[minor],ap_fds[minor]);
-#endif
-
-  wake_up(&busy_wait);  
-} 
-
-static struct block_device_operations ap_fops = {
-	open:		ap_open,
-	release:	ap_release,
-	ioctl:		ap_ioctl,
-};
-
-
-int ap_init(void)
-{
-  int i;
-  static int done = 0;
-
-  if (done) return(1);
-
-  if (register_blkdev(MAJOR_NR,"apblock",&ap_fops)) {
-    printk("ap: unable to get major %d for ap block dev\n",MAJOR_NR);
-    return -1;
-  }
-  printk("ap_init: register dev %d\n", MAJOR_NR);
-  blk_init_queue(BLK_DEFAULT_QUEUE(MAJOR_NR), &ap_request);
-
-  for (i=0;i<NUM_APDEVS;i++) {
-    ap_blocksizes[i] = AP_BLOCK_SIZE;
-    ap_length[i] = 0;
-    ap_fds[i] = -1;
-  }
-
-  blksize_size[MAJOR_NR] = ap_blocksizes;
-
-  read_ahead[MAJOR_NR] = 32; /* 16k read ahead */
-  for (i=0;i<NUM_APDEVS;i++)
-	register_disk(NILL, MKDEV(MAJOR_NR,i), 1, &ap_fops, 0);
-
-  return(0);
-}
-
-/* loadable module support */
-
-#ifdef MODULE
-
-int init_module(void)
-{
-	int error = ap_init();
-	if (!error)
-		printk(KERN_INFO "APBLOCK: Loaded as module.\n");
-	return error;
-}
-
-/* Before freeing the module, invalidate all of the protected buffers! */
-void cleanup_module(void)
-{
-	int i;
-
-	for (i = 0 ; i < NUM_APDEVS; i++)
-		invalidate_buffers(MKDEV(MAJOR_NR, i));
-
-	unregister_blkdev( MAJOR_NR, "apblock" );
-	blk_cleanup_queue(BLK_DEFAULT_QUEUE(MAJOR_NR));
-}
-
-#endif  /* MODULE */