diff options
Diffstat (limited to '')
| -rw-r--r-- | c/src/exec/libblock/src/blkdev.c | 245 |
1 files changed, 0 insertions, 245 deletions
diff --git a/c/src/exec/libblock/src/blkdev.c b/c/src/exec/libblock/src/blkdev.c deleted file mode 100644 index d769dc45ca..0000000000 --- a/c/src/exec/libblock/src/blkdev.c +++ /dev/null @@ -1,245 +0,0 @@ -/* - * blkdev.h - block device driver generic support - * - * Copyright (C) 2001 OKTET Ltd., St.-Petersburg, Russia - * Author: Victor V. Vengerov <vvv@oktet.ru> - * - * @(#) $Id$ - */ - -#include <string.h> - -#include <rtems.h> -#include <rtems/libio.h> -#include <sys/ioctl.h> - -#include "rtems/diskdevs.h" -#include "rtems/bdbuf.h" - -/* rtems_blkdev_generic_read -- - * Generic block device read primitive. Implemented using block device - * buffer management primitives. - */ -rtems_device_driver -rtems_blkdev_generic_read( - rtems_device_major_number major, - rtems_device_minor_number minor, - void * arg) -{ - rtems_libio_rw_args_t *args = arg; - int block_size_log2; - int block_size; - char *buf; - unsigned int count; - unsigned int block; - unsigned int blkofs; - dev_t dev; - disk_device *dd; - - dev = rtems_filesystem_make_dev_t(major, minor); - dd = rtems_disk_lookup(dev); - if (dd == NULL) - return RTEMS_INVALID_NUMBER; - - block_size_log2 = dd->block_size_log2; - block_size = dd->block_size; - - buf = args->buffer; - count = args->count; - args->bytes_moved = 0; - - block = args->offset >> block_size_log2; - blkofs = args->offset & (block_size - 1); - - while (count > 0) - { - bdbuf_buffer *diskbuf; - int copy; - rtems_status_code rc; - - rc = rtems_bdbuf_read(dev, block, &diskbuf); - if (rc != RTEMS_SUCCESSFUL) - return rc; - copy = block_size - blkofs; - if (copy > count) - copy = count; - memcpy(buf, (char *)diskbuf->buffer + blkofs, copy); - rc = rtems_bdbuf_release(diskbuf); - args->bytes_moved += copy; - if (rc != RTEMS_SUCCESSFUL) - return rc; - count -= copy; - buf += copy; - blkofs = 0; - block++; - } - return RTEMS_SUCCESSFUL; -} - -/* rtems_blkdev_generic_write -- - * Generic block device write primitive. Implemented using block device - * buffer management primitives. - */ -rtems_device_driver -rtems_blkdev_generic_write( - rtems_device_major_number major, - rtems_device_minor_number minor, - void * arg) -{ - rtems_libio_rw_args_t *args = arg; - int block_size_log2; - int block_size; - char *buf; - unsigned int count; - unsigned int block; - unsigned int blkofs; - dev_t dev; - rtems_status_code rc; - disk_device *dd; - - dev = rtems_filesystem_make_dev_t(major, minor); - dd = rtems_disk_lookup(dev); - if (dd == NULL) - return RTEMS_INVALID_NUMBER; - - block_size_log2 = dd->block_size_log2; - block_size = dd->block_size; - - buf = args->buffer; - count = args->count; - args->bytes_moved = 0; - - block = args->offset >> block_size_log2; - blkofs = args->offset & (block_size - 1); - - while (count > 0) - { - bdbuf_buffer *diskbuf; - int copy; - - if ((blkofs == 0) && (count > block_size)) - rc = rtems_bdbuf_get(dev, block, &diskbuf); - else - rc = rtems_bdbuf_read(dev, block, &diskbuf); - if (rc != RTEMS_SUCCESSFUL) - return rc; - - copy = block_size - blkofs; - if (copy > count) - copy = count; - memcpy((char *)diskbuf->buffer + blkofs, buf, copy); - args->bytes_moved += copy; - - rc = rtems_bdbuf_release_modified(diskbuf); - if (rc != RTEMS_SUCCESSFUL) - return rc; - - count -= copy; - buf += copy; - blkofs = 0; - block++; - } - return RTEMS_SUCCESSFUL; -} - -/* blkdev_generic_open -- - * Generic block device open primitive. - */ -rtems_device_driver -rtems_blkdev_generic_open( - rtems_device_major_number major, - rtems_device_minor_number minor, - void * arg) -{ - dev_t dev; - disk_device *dd; - - dev = rtems_filesystem_make_dev_t(major, minor); - dd = rtems_disk_lookup(dev); - if (dd == NULL) - return RTEMS_INVALID_NUMBER; - - dd->uses++; - - rtems_disk_release(dd); - - return RTEMS_SUCCESSFUL; -} - - -/* blkdev_generic_close -- - * Generic block device close primitive. - */ -rtems_device_driver -rtems_blkdev_generic_close( - rtems_device_major_number major, - rtems_device_minor_number minor, - void * arg) -{ - dev_t dev; - disk_device *dd; - - dev = rtems_filesystem_make_dev_t(major, minor); - dd = rtems_disk_lookup(dev); - if (dd == NULL) - return RTEMS_INVALID_NUMBER; - - dd->uses--; - - rtems_disk_release(dd); - - return RTEMS_SUCCESSFUL; -} - -/* blkdev_generic_ioctl -- - * Generic block device ioctl primitive. - */ -rtems_device_driver -rtems_blkdev_generic_ioctl( - rtems_device_major_number major, - rtems_device_minor_number minor, - void * arg) -{ - rtems_libio_ioctl_args_t *args = arg; - dev_t dev; - disk_device *dd; - int rc; - - dev = rtems_filesystem_make_dev_t(major, minor); - dd = rtems_disk_lookup(dev); - if (dd == NULL) - return RTEMS_INVALID_NUMBER; - - switch (args->command) - { - case BLKIO_GETBLKSIZE: - args->ioctl_return = dd->block_size; - break; - - case BLKIO_GETSIZE: - args->ioctl_return = dd->size; - break; - - case BLKIO_SYNCDEV: - rc = rtems_bdbuf_syncdev(dd->dev); - args->ioctl_return = (rc == RTEMS_SUCCESSFUL ? 0 : -1); - break; - - case BLKIO_REQUEST: - { - blkdev_request *req = args->buffer; - req->start += dd->start; - args->ioctl_return = dd->ioctl(dd->phys_dev->dev, args->command, - req); - break; - } - - default: - args->ioctl_return = dd->ioctl(dd->phys_dev->dev, args->command, - args->buffer); - break; - } - rtems_disk_release(dd); - - return RTEMS_SUCCESSFUL; -} |