This source file includes following definitions.
- end_request
- end_request
1 #ifndef _BLK_H
2 #define _BLK_H
3
4 #include <linux/blkdev.h>
5 #include <linux/locks.h>
6 #include <linux/config.h>
7
8
9
10
11
12
13
14
15
16
17
18 #define NR_REQUEST 64
19
20
21
22
23
24
25 #define IN_ORDER(s1,s2) \
26 ((s1)->cmd < (s2)->cmd || ((s1)->cmd == (s2)->cmd && \
27 ((s1)->dev < (s2)->dev || (((s1)->dev == (s2)->dev && \
28 (s1)->sector < (s2)->sector)))))
29
30
31
32
33
34 #ifdef IDE_DRIVER
35 #define SECTOR_MASK ((BLOCK_SIZE >> 9) - 1)
36 #else
37 #define SECTOR_MASK (blksize_size[MAJOR_NR] && \
38 blksize_size[MAJOR_NR][MINOR(CURRENT->dev)] ? \
39 ((blksize_size[MAJOR_NR][MINOR(CURRENT->dev)] >> 9) - 1) : \
40 ((BLOCK_SIZE >> 9) - 1))
41 #endif
42
43 #define SUBSECTOR(block) (CURRENT->current_nr_sectors > 0)
44
45 extern unsigned long cdu31a_init(unsigned long mem_start, unsigned long mem_end);
46 extern unsigned long mcd_init(unsigned long mem_start, unsigned long mem_end);
47 #ifdef CONFIG_BLK_DEV_HD
48 extern unsigned long hd_init(unsigned long mem_start, unsigned long mem_end);
49 #endif
50 #ifdef CONFIG_BLK_DEV_IDE
51 extern unsigned long ide_init(unsigned long mem_start, unsigned long mem_end);
52 #endif
53 #ifdef CONFIG_SBPCD
54 extern unsigned long sbpcd_init(unsigned long, unsigned long);
55 #endif CONFIG_SBPCD
56 extern void set_device_ro(int dev,int flag);
57
58 extern void floppy_init(void);
59 #ifdef FD_MODULE
60 static
61 #else
62 extern
63 #endif
64 int new_floppy_init(void);
65 extern void rd_load(void);
66 extern long rd_init(long mem_start, int length);
67 extern int ramdisk_size;
68
69 extern unsigned long xd_init(unsigned long mem_start, unsigned long mem_end);
70
71 #define RO_IOCTLS(dev,where) \
72 case BLKROSET: if (!suser()) return -EACCES; \
73 set_device_ro((dev),get_fs_long((long *) (where))); return 0; \
74 case BLKROGET: { int __err = verify_area(VERIFY_WRITE, (void *) (where), sizeof(long)); \
75 if (!__err) put_fs_long(0!=is_read_only(dev),(long *) (where)); return __err; }
76
77 #if defined(MAJOR_NR) || defined(IDE_DRIVER)
78
79
80
81
82
83 #ifdef IDE_DRIVER
84
85 #define DEVICE_NR(device) (MINOR(device) >> PARTN_BITS)
86 #define DEVICE_ON(device)
87 #define DEVICE_OFF(device)
88
89 #elif (MAJOR_NR == MEM_MAJOR)
90
91
92 #define DEVICE_NAME "ramdisk"
93 #define DEVICE_REQUEST do_rd_request
94 #define DEVICE_NR(device) ((device) & 7)
95 #define DEVICE_ON(device)
96 #define DEVICE_OFF(device)
97
98 #elif (MAJOR_NR == FLOPPY_MAJOR)
99
100 static void floppy_off(unsigned int nr);
101
102 #define DEVICE_NAME "floppy"
103 #define DEVICE_INTR do_floppy
104 #define DEVICE_REQUEST do_fd_request
105 #define DEVICE_NR(device) ( ((device) & 3) | (((device) & 0x80 ) >> 5 ))
106 #define DEVICE_ON(device)
107 #define DEVICE_OFF(device) floppy_off(DEVICE_NR(device))
108
109 #elif (MAJOR_NR == HD_MAJOR)
110
111
112 #define DEVICE_NAME "harddisk"
113 #define DEVICE_INTR do_hd
114 #define DEVICE_TIMEOUT HD_TIMER
115 #define TIMEOUT_VALUE 600
116 #define DEVICE_REQUEST do_hd_request
117 #define DEVICE_NR(device) (MINOR(device)>>6)
118 #define DEVICE_ON(device)
119 #define DEVICE_OFF(device)
120
121 #elif (MAJOR_NR == SCSI_DISK_MAJOR)
122
123 #define DEVICE_NAME "scsidisk"
124 #define DEVICE_INTR do_sd
125 #define TIMEOUT_VALUE 200
126 #define DEVICE_REQUEST do_sd_request
127 #define DEVICE_NR(device) (MINOR(device) >> 4)
128 #define DEVICE_ON(device)
129 #define DEVICE_OFF(device)
130
131 #elif (MAJOR_NR == SCSI_TAPE_MAJOR)
132
133 #define DEVICE_NAME "scsitape"
134 #define DEVICE_INTR do_st
135 #define DEVICE_NR(device) (MINOR(device) & 0x7f)
136 #define DEVICE_ON(device)
137 #define DEVICE_OFF(device)
138
139 #elif (MAJOR_NR == SCSI_CDROM_MAJOR)
140
141 #define DEVICE_NAME "CD-ROM"
142 #define DEVICE_INTR do_sr
143 #define DEVICE_REQUEST do_sr_request
144 #define DEVICE_NR(device) (MINOR(device))
145 #define DEVICE_ON(device)
146 #define DEVICE_OFF(device)
147
148 #elif (MAJOR_NR == XT_DISK_MAJOR)
149
150 #define DEVICE_NAME "xt disk"
151 #define DEVICE_REQUEST do_xd_request
152 #define DEVICE_NR(device) (MINOR(device) >> 6)
153 #define DEVICE_ON(device)
154 #define DEVICE_OFF(device)
155
156 #elif (MAJOR_NR == CDU31A_CDROM_MAJOR)
157
158 #define DEVICE_NAME "CDU31A"
159 #define DEVICE_REQUEST do_cdu31a_request
160 #define DEVICE_NR(device) (MINOR(device))
161 #define DEVICE_ON(device)
162 #define DEVICE_OFF(device)
163
164 #elif (MAJOR_NR == MITSUMI_CDROM_MAJOR)
165
166 #define DEVICE_NAME "Mitsumi CD-ROM"
167
168 #define DEVICE_REQUEST do_mcd_request
169 #define DEVICE_NR(device) (MINOR(device))
170 #define DEVICE_ON(device)
171 #define DEVICE_OFF(device)
172
173 #elif (MAJOR_NR == MATSUSHITA_CDROM_MAJOR)
174
175 #define DEVICE_NAME "Matsushita CD-ROM controller #1"
176 #define DEVICE_REQUEST do_sbpcd_request
177 #define DEVICE_NR(device) (MINOR(device))
178 #define DEVICE_ON(device)
179 #define DEVICE_OFF(device)
180
181 #elif (MAJOR_NR == MATSUSHITA_CDROM2_MAJOR)
182
183 #define DEVICE_NAME "Matsushita CD-ROM controller #2"
184 #define DEVICE_REQUEST do_sbpcd2_request
185 #define DEVICE_NR(device) (MINOR(device))
186 #define DEVICE_ON(device)
187 #define DEVICE_OFF(device)
188
189 #elif (MAJOR_NR == MATSUSHITA_CDROM3_MAJOR)
190
191 #define DEVICE_NAME "Matsushita CD-ROM controller #3"
192 #define DEVICE_REQUEST do_sbpcd3_request
193 #define DEVICE_NR(device) (MINOR(device))
194 #define DEVICE_ON(device)
195 #define DEVICE_OFF(device)
196
197 #elif (MAJOR_NR == MATSUSHITA_CDROM4_MAJOR)
198
199 #define DEVICE_NAME "Matsushita CD-ROM controller #4"
200 #define DEVICE_REQUEST do_sbpcd4_request
201 #define DEVICE_NR(device) (MINOR(device))
202 #define DEVICE_ON(device)
203 #define DEVICE_OFF(device)
204
205 #endif
206
207 #if (MAJOR_NR != SCSI_TAPE_MAJOR) && !defined(IDE_DRIVER)
208
209 #ifndef CURRENT
210 #define CURRENT (blk_dev[MAJOR_NR].current_request)
211 #endif
212
213 #define CURRENT_DEV DEVICE_NR(CURRENT->dev)
214
215 #ifdef DEVICE_INTR
216 void (*DEVICE_INTR)(void) = NULL;
217 #endif
218 #ifdef DEVICE_TIMEOUT
219
220 #define SET_TIMER \
221 ((timer_table[DEVICE_TIMEOUT].expires = jiffies + TIMEOUT_VALUE), \
222 (timer_active |= 1<<DEVICE_TIMEOUT))
223
224 #define CLEAR_TIMER \
225 timer_active &= ~(1<<DEVICE_TIMEOUT)
226
227 #define SET_INTR(x) \
228 if ((DEVICE_INTR = (x)) != NULL) \
229 SET_TIMER; \
230 else \
231 CLEAR_TIMER;
232
233 #else
234
235 #define SET_INTR(x) (DEVICE_INTR = (x))
236
237 #endif
238
239 static void (DEVICE_REQUEST)(void);
240
241 #ifdef DEVICE_INTR
242 #define CLEAR_INTR SET_INTR(NULL)
243 #else
244 #define CLEAR_INTR
245 #endif
246
247 #define INIT_REQUEST \
248 if (!CURRENT) {\
249 CLEAR_INTR; \
250 return; \
251 } \
252 if (MAJOR(CURRENT->dev) != MAJOR_NR) \
253 panic(DEVICE_NAME ": request list destroyed"); \
254 if (CURRENT->bh) { \
255 if (!CURRENT->bh->b_lock) \
256 panic(DEVICE_NAME ": block not locked"); \
257 }
258
259 #endif
260
261
262
263 #if ! SCSI_MAJOR(MAJOR_NR)
264
265 #ifdef IDE_DRIVER
266 static void end_request(byte uptodate, byte hwif) {
267 struct request *req = ide_cur_rq[HWIF];
268 #else
269 static void end_request(int uptodate) {
270 struct request *req = CURRENT;
271 #endif
272 struct buffer_head * bh;
273
274 req->errors = 0;
275 if (!uptodate) {
276 printk("end_request: I/O error, dev %04lX, sector %lu\n",
277 (unsigned long)req->dev, req->sector);
278 req->nr_sectors--;
279 req->nr_sectors &= ~SECTOR_MASK;
280 req->sector += (BLOCK_SIZE / 512);
281 req->sector &= ~SECTOR_MASK;
282 }
283
284 if ((bh = req->bh) != NULL) {
285 req->bh = bh->b_reqnext;
286 bh->b_reqnext = NULL;
287 bh->b_uptodate = uptodate;
288 if (!uptodate) bh->b_req = 0;
289 unlock_buffer(bh);
290 if ((bh = req->bh) != NULL) {
291 req->current_nr_sectors = bh->b_size >> 9;
292 if (req->nr_sectors < req->current_nr_sectors) {
293 req->nr_sectors = req->current_nr_sectors;
294 printk("end_request: buffer-list destroyed\n");
295 }
296 req->buffer = bh->b_data;
297 return;
298 }
299 }
300 #ifdef IDE_DRIVER
301 ide_cur_rq[HWIF] = NULL;
302 #else
303 DEVICE_OFF(req->dev);
304 CURRENT = req->next;
305 #endif
306 if (req->sem != NULL)
307 up(req->sem);
308 req->dev = -1;
309 wake_up(&wait_for_request);
310 }
311 #endif
312
313 #endif
314
315 #endif