RTEMS  5.1
blkdev.h
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1 
9 /*
10  * Copyright (C) 2001 OKTET Ltd., St.-Petersburg, Russia
11  * Author: Victor V. Vengerov <vvv@oktet.ru>
12  */
13 
14 #ifndef _RTEMS_BLKDEV_H
15 #define _RTEMS_BLKDEV_H
16 
17 #include <rtems.h>
18 #include <rtems/diskdevs.h>
19 #include <rtems/print.h>
20 #include <sys/ioccom.h>
21 #include <stdio.h>
22 
23 #ifdef __cplusplus
24 extern "C" {
25 #endif
26 
54 
56 
60 typedef void (*rtems_blkdev_request_cb)(
61  struct rtems_blkdev_request *req,
63 );
64 
68 typedef struct rtems_blkdev_sg_buffer {
73 
77  uint32_t length;
78 
82  void *buffer;
83 
87  void *user;
89 
102 typedef struct rtems_blkdev_request {
107 
112 
116  void *done_arg;
117 
122 
126  uint32_t bufnum;
127 
132 
133  /*
134  * TODO: The use of these req blocks is not a great design. The req is a
135  * struct with a single 'bufs' declared in the req struct and the
136  * others are added in the outer level struct. This relies on the
137  * structs joining as a single array and that assumes the compiler
138  * packs the structs. Why not just place on a list ? The BD has a
139  * node that can be used.
140  */
141 
145  rtems_blkdev_sg_buffer bufs[RTEMS_ZERO_LENGTH_ARRAY];
147 
159 static inline void rtems_blkdev_request_done(
161  rtems_status_code status
162 )
163 {
164  (*req->done)(req, status);
165 }
166 
173 #define RTEMS_BLKDEV_START_BLOCK(req) (req->bufs[0].block)
174 
180 #define RTEMS_BLKIO_REQUEST _IOWR('B', 1, rtems_blkdev_request)
181 #define RTEMS_BLKIO_GETMEDIABLKSIZE _IOR('B', 2, uint32_t)
182 #define RTEMS_BLKIO_GETBLKSIZE _IOR('B', 3, uint32_t)
183 #define RTEMS_BLKIO_SETBLKSIZE _IOW('B', 4, uint32_t)
184 #define RTEMS_BLKIO_GETSIZE _IOR('B', 5, rtems_blkdev_bnum)
185 #define RTEMS_BLKIO_SYNCDEV _IO('B', 6)
186 #define RTEMS_BLKIO_DELETED _IO('B', 7)
187 #define RTEMS_BLKIO_CAPABILITIES _IO('B', 8)
188 #define RTEMS_BLKIO_GETDISKDEV _IOR('B', 9, rtems_disk_device *)
189 #define RTEMS_BLKIO_PURGEDEV _IO('B', 10)
190 #define RTEMS_BLKIO_GETDEVSTATS _IOR('B', 11, rtems_blkdev_stats *)
191 #define RTEMS_BLKIO_RESETDEVSTATS _IO('B', 12)
192 
195 static inline int rtems_disk_fd_get_media_block_size(
196  int fd,
197  uint32_t *media_block_size
198 )
199 {
200  return ioctl(fd, RTEMS_BLKIO_GETMEDIABLKSIZE, media_block_size);
201 }
202 
203 static inline int rtems_disk_fd_get_block_size(int fd, uint32_t *block_size)
204 {
205  return ioctl(fd, RTEMS_BLKIO_GETBLKSIZE, block_size);
206 }
207 
208 static inline int rtems_disk_fd_set_block_size(int fd, uint32_t block_size)
209 {
210  return ioctl(fd, RTEMS_BLKIO_SETBLKSIZE, &block_size);
211 }
212 
213 static inline int rtems_disk_fd_get_block_count(
214  int fd,
215  rtems_blkdev_bnum *block_count
216 )
217 {
218  return ioctl(fd, RTEMS_BLKIO_GETSIZE, block_count);
219 }
220 
221 static inline int rtems_disk_fd_get_disk_device(
222  int fd,
223  rtems_disk_device **dd_ptr
224 )
225 {
226  return ioctl(fd, RTEMS_BLKIO_GETDISKDEV, dd_ptr);
227 }
228 
229 static inline int rtems_disk_fd_sync(int fd)
230 {
231  return ioctl(fd, RTEMS_BLKIO_SYNCDEV);
232 }
233 
234 static inline int rtems_disk_fd_purge(int fd)
235 {
236  return ioctl(fd, RTEMS_BLKIO_PURGEDEV);
237 }
238 
239 static inline int rtems_disk_fd_get_device_stats(
240  int fd,
241  rtems_blkdev_stats *stats
242 )
243 {
244  return ioctl(fd, RTEMS_BLKIO_GETDEVSTATS, stats);
245 }
246 
247 static inline int rtems_disk_fd_reset_device_stats(int fd)
248 {
249  return ioctl(fd, RTEMS_BLKIO_RESETDEVSTATS);
250 }
251 
264 #define RTEMS_BLKDEV_CAP_MULTISECTOR_CONT (1 << 0)
265 
271 #define RTEMS_BLKDEV_CAP_SYNC (1 << 1)
272 
281 int
282 rtems_blkdev_ioctl(rtems_disk_device *dd, uint32_t req, void *argp);
283 
305  const char *device,
306  uint32_t media_block_size,
307  rtems_blkdev_bnum media_block_count,
308  rtems_block_device_ioctl handler,
309  void *driver_data
310 );
311 
338  const char *partition,
339  const char *parent_block_device,
340  rtems_blkdev_bnum media_block_begin,
341  rtems_blkdev_bnum media_block_count
342 );
343 
348  const rtems_blkdev_stats *stats,
349  uint32_t media_block_size,
350  uint32_t media_block_count,
351  uint32_t block_size,
352  const rtems_printer* printer
353 );
354 
358 void rtems_blkstats(
359  const rtems_printer *printer,
360  const char *device,
361  bool reset
362 );
363 
383 #define RTEMS_GENERIC_BLOCK_DEVICE_DRIVER_ENTRIES \
384  rtems_blkdev_generic_open, \
385  rtems_blkdev_generic_close, \
386  rtems_blkdev_generic_read, \
387  rtems_blkdev_generic_write, \
388  rtems_blkdev_generic_ioctl
389 
390 /* Use rtems_blkdev_create() instead */
391 RTEMS_DEPRECATED rtems_device_driver
392 rtems_blkdev_generic_read(
393  rtems_device_major_number major,
394  rtems_device_minor_number minor,
395  void * arg
396 );
397 
398 /* Use rtems_blkdev_create() instead */
399 RTEMS_DEPRECATED rtems_device_driver
400 rtems_blkdev_generic_write(
401  rtems_device_major_number major,
402  rtems_device_minor_number minor,
403  void * arg
404 );
405 
406 /* Use rtems_blkdev_create() instead */
407 RTEMS_DEPRECATED rtems_device_driver
408 rtems_blkdev_generic_open(
409  rtems_device_major_number major,
410  rtems_device_minor_number minor,
411  void * arg
412 );
413 
414 /* Use rtems_blkdev_create() instead */
415 RTEMS_DEPRECATED rtems_device_driver
416 rtems_blkdev_generic_close(
417  rtems_device_major_number major,
418  rtems_device_minor_number minor,
419  void * arg
420 );
421 
422 /* Use rtems_blkdev_create() instead */
423 RTEMS_DEPRECATED rtems_device_driver
424 rtems_blkdev_generic_ioctl(
425  rtems_device_major_number major,
426  rtems_device_minor_number minor,
427  void * arg
428 );
429 
430 /* Use rtems_blkdev_create() instead */
431 RTEMS_DEPRECATED extern const rtems_driver_address_table rtems_blkdev_generic_ops;
432 
435 #ifdef __cplusplus
436 }
437 #endif
438 
439 #endif
uint32_t rtems_blkdev_bnum
Block device block index type.
Definition: diskdevs.h:45
void * user
Definition: blkdev.h:87
int(* rtems_block_device_ioctl)(rtems_disk_device *dd, uint32_t req, void *argp)
Block device IO control handler type.
Definition: diskdevs.h:50
rtems_blkdev_request_cb done
Definition: blkdev.h:111
Definition: media.c:43
rtems_status_code rtems_blkdev_create_partition(const char *partition, const char *parent_block_device, rtems_blkdev_bnum media_block_begin, rtems_blkdev_bnum media_block_count)
Creates a partition within a parent block device.
Definition: blkdev-imfs.c:330
rtems_blkdev_request_op
Block device request type.
Definition: blkdev.h:49
Definition: printer.h:55
uint32_t bufnum
Definition: blkdev.h:126
void rtems_blkstats(const rtems_printer *printer, const char *device, bool reset)
Block device statistics command.
Definition: blkdev-blkstats.c:35
Block device statistics.
Definition: diskdevs.h:92
Definition: rtemscompat1.h:15
rtems_status_code rtems_blkdev_create(const char *device, uint32_t media_block_size, rtems_blkdev_bnum media_block_count, rtems_block_device_ioctl handler, void *driver_data)
Creates a block device.
Definition: blkdev-imfs.c:280
struct rtems_blkdev_sg_buffer rtems_blkdev_sg_buffer
Block device scatter or gather buffer structure.
Definition: io.h:48
Description of a disk device (logical and physical disks).
Definition: diskdevs.h:157
rtems_id io_task
Definition: blkdev.h:131
The block device transfer request is used to read or write a number of blocks from or to the device.
Definition: blkdev.h:102
rtems_status_code
Classic API Status.
Definition: status.h:43
Block Device Disk Management API.
void(* rtems_blkdev_request_cb)(struct rtems_blkdev_request *req, rtems_status_code status)
Block device request done callback function type.
Definition: blkdev.h:60
Definition: blkdev.h:52
Definition: blkdev.h:50
Block device scatter or gather buffer structure.
Definition: blkdev.h:68
void rtems_blkdev_print_stats(const rtems_blkdev_stats *stats, uint32_t media_block_size, uint32_t media_block_count, uint32_t block_size, const rtems_printer *printer)
Prints the block device statistics.
Definition: blkdev-print-stats.c:31
void * buffer
Definition: blkdev.h:82
rtems_blkdev_bnum block
Definition: blkdev.h:72
Definition: blkdev.h:51
uint32_t length
Definition: blkdev.h:77
int rtems_blkdev_ioctl(rtems_disk_device *dd, uint32_t req, void *argp)
Common IO control primitive.
Definition: blkdev-ioctl.c:24
Objects_Id rtems_id
Used to manage and manipulate RTEMS object identifiers.
Definition: types.h:83
rtems_blkdev_request_op req
Definition: blkdev.h:106
rtems_blkdev_sg_buffer bufs[RTEMS_ZERO_LENGTH_ARRAY]
Definition: blkdev.h:145
struct rtems_blkdev_request rtems_blkdev_request
The block device transfer request is used to read or write a number of blocks from or to the device.
rtems_status_code status
Definition: blkdev.h:121
void * done_arg
Definition: blkdev.h:116