1 | /* |
---|
2 | * devfs.c - DEVFS File system API implementation. |
---|
3 | * |
---|
4 | * Author Mohamed Lamine Karaoui (2014,2015) |
---|
5 | * Alain Greiner (2016,2017) |
---|
6 | * |
---|
7 | * Copyright (c) Sorbonne Universites |
---|
8 | * |
---|
9 | * This file is part of ALMOS-MKH. |
---|
10 | * |
---|
11 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
---|
12 | * under the terms of the GNU General Public License as published by |
---|
13 | * the Free Software Foundation; version 2.0 of the License. |
---|
14 | * |
---|
15 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
---|
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
---|
18 | * General Public License for more details. |
---|
19 | * |
---|
20 | * You should have received a copy of the GNU General Public License |
---|
21 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
---|
22 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
---|
23 | */ |
---|
24 | |
---|
25 | #include <hal_kernel_types.h> |
---|
26 | #include <hal_special.h> |
---|
27 | #include <hal_uspace.h> |
---|
28 | #include <printk.h> |
---|
29 | #include <chdev.h> |
---|
30 | #include <thread.h> |
---|
31 | #include <dev_txt.h> |
---|
32 | #include <cluster.h> |
---|
33 | #include <vfs.h> |
---|
34 | #include <kmem.h> |
---|
35 | #include <devfs.h> |
---|
36 | |
---|
37 | ///////////////////////////////////////////////////////////////////////////////////////// |
---|
38 | // Extern variables |
---|
39 | ///////////////////////////////////////////////////////////////////////////////////////// |
---|
40 | |
---|
41 | extern vfs_ctx_t fs_context[]; // allocated in kernel_init.c |
---|
42 | extern chdev_directory_t chdev_dir; // allocated in kernel_init.c |
---|
43 | |
---|
44 | #if (DEBUG_SYS_READ & 1) |
---|
45 | extern uint32_t enter_devfs_read; |
---|
46 | extern uint32_t exit_devfs_read; |
---|
47 | #endif |
---|
48 | |
---|
49 | #if (DEBUG_SYS_WRITE & 1) |
---|
50 | extern uint32_t enter_devfs_write; |
---|
51 | extern uint32_t exit_devfs_write; |
---|
52 | #endif |
---|
53 | |
---|
54 | /////////////////////////////// |
---|
55 | devfs_ctx_t * devfs_ctx_alloc( void ) |
---|
56 | { |
---|
57 | kmem_req_t req; |
---|
58 | |
---|
59 | req.type = KMEM_DEVFS_CTX; |
---|
60 | req.size = sizeof(devfs_ctx_t); |
---|
61 | req.flags = AF_KERNEL | AF_ZERO; |
---|
62 | |
---|
63 | return (devfs_ctx_t *)kmem_alloc( &req ); |
---|
64 | } |
---|
65 | |
---|
66 | ///////////////////////////////////////////// |
---|
67 | void devfs_ctx_init( devfs_ctx_t * devfs_ctx, |
---|
68 | xptr_t devfs_dev_inode_xp, |
---|
69 | xptr_t devfs_external_inode_xp ) |
---|
70 | { |
---|
71 | devfs_ctx->dev_inode_xp = devfs_dev_inode_xp; |
---|
72 | devfs_ctx->external_inode_xp = devfs_external_inode_xp; |
---|
73 | |
---|
74 | fs_context[FS_TYPE_DEVFS].extend = devfs_ctx; |
---|
75 | } |
---|
76 | |
---|
77 | ///////////////////////////////////////////////// |
---|
78 | void devfs_ctx_destroy( devfs_ctx_t * devfs_ctx ) |
---|
79 | { |
---|
80 | kmem_req_t req; |
---|
81 | |
---|
82 | req.type = KMEM_DEVFS_CTX; |
---|
83 | req.ptr = devfs_ctx; |
---|
84 | kmem_free( &req ); |
---|
85 | } |
---|
86 | |
---|
87 | ///////////////////////////////////////////////// |
---|
88 | void devfs_global_init( xptr_t parent_inode_xp, |
---|
89 | xptr_t * devfs_dev_inode_xp, |
---|
90 | xptr_t * devfs_external_inode_xp ) |
---|
91 | { |
---|
92 | error_t error; |
---|
93 | |
---|
94 | #if DEBUG_DEVFS_INIT |
---|
95 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
96 | if( DEBUG_DEVFS_INIT < cycle ) |
---|
97 | printk("\n[DBG] %s : thread %x enter at cycle %d\n", |
---|
98 | __FUNCTION__ , CURRENT_THREAD , cycle ); |
---|
99 | #endif |
---|
100 | |
---|
101 | // creates DEVFS "dev" inode in cluster 0 |
---|
102 | error = vfs_add_child_in_parent( 0, // cxy |
---|
103 | INODE_TYPE_DIR, |
---|
104 | FS_TYPE_DEVFS, |
---|
105 | parent_inode_xp, |
---|
106 | "dev", |
---|
107 | NULL, |
---|
108 | devfs_dev_inode_xp ); |
---|
109 | |
---|
110 | assert( (error == 0) , "cannot create <dev>\n" ); |
---|
111 | |
---|
112 | #if( DEBUG_DEVFS_INIT & 1 ) |
---|
113 | if( DEBUG_DEVFS_INIT < cycle ) |
---|
114 | printk("\n[DBG] %s : created <dev> inode at cycle %d\n", __FUNCTION__, cycle ); |
---|
115 | #endif |
---|
116 | |
---|
117 | // create DEVFS "external" inode in cluster 0 |
---|
118 | error = vfs_add_child_in_parent( 0, // cxy |
---|
119 | INODE_TYPE_DIR, |
---|
120 | FS_TYPE_DEVFS, |
---|
121 | *devfs_dev_inode_xp, |
---|
122 | "external", |
---|
123 | NULL, |
---|
124 | devfs_external_inode_xp ); |
---|
125 | |
---|
126 | assert( (error == 0) , "cannot create <external>\n" ); |
---|
127 | |
---|
128 | #if DEBUG_DEVFS_INIT |
---|
129 | cycle = (uint32_t)hal_get_cycles(); |
---|
130 | if( DEBUG_DEVFS_INIT < cycle ) |
---|
131 | printk("\n[DBG] %s : thread %x exit at cycle %d\n", |
---|
132 | __FUNCTION__ , CURRENT_THREAD , cycle ); |
---|
133 | #endif |
---|
134 | |
---|
135 | } |
---|
136 | |
---|
137 | /////////////////////////////////////////////////// |
---|
138 | void devfs_local_init( xptr_t devfs_dev_inode_xp, |
---|
139 | xptr_t devfs_external_inode_xp, |
---|
140 | xptr_t * devfs_internal_inode_xp ) |
---|
141 | { |
---|
142 | char node_name[16]; |
---|
143 | xptr_t chdev_xp; |
---|
144 | cxy_t chdev_cxy; |
---|
145 | chdev_t * chdev_ptr; |
---|
146 | xptr_t inode_xp; |
---|
147 | uint32_t channel; |
---|
148 | |
---|
149 | #if DEBUG_DEVFS_INIT |
---|
150 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
151 | if( DEBUG_DEVFS_INIT < cycle ) |
---|
152 | printk("\n[DBG] %s : thread %x enter at cycle %d\n", |
---|
153 | __FUNCTION__ , CURRENT_THREAD , cycle ); |
---|
154 | #endif |
---|
155 | |
---|
156 | // create "internal" directory linked to "dev" |
---|
157 | snprintf( node_name , 16 , "internal_%x" , local_cxy ); |
---|
158 | vfs_add_child_in_parent( local_cxy, |
---|
159 | INODE_TYPE_DIR, |
---|
160 | FS_TYPE_DEVFS, |
---|
161 | devfs_dev_inode_xp, |
---|
162 | node_name, |
---|
163 | NULL, |
---|
164 | devfs_internal_inode_xp ); |
---|
165 | |
---|
166 | // create MMC chdev inode |
---|
167 | chdev_xp = chdev_dir.mmc[local_cxy]; |
---|
168 | if( chdev_xp != XPTR_NULL) |
---|
169 | { |
---|
170 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
---|
171 | vfs_add_child_in_parent( local_cxy, |
---|
172 | INODE_TYPE_DEV, |
---|
173 | FS_TYPE_DEVFS, |
---|
174 | *devfs_internal_inode_xp, |
---|
175 | chdev_ptr->name, |
---|
176 | GET_PTR( chdev_xp ), |
---|
177 | &inode_xp ); |
---|
178 | } |
---|
179 | |
---|
180 | // create DMA chdev inodes (one DMA channel per core) |
---|
181 | for( channel = 0 ; channel < LOCAL_CLUSTER->cores_nr ; channel++ ) |
---|
182 | { |
---|
183 | chdev_xp = chdev_dir.dma[channel]; |
---|
184 | if( chdev_xp != XPTR_NULL) |
---|
185 | { |
---|
186 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
---|
187 | vfs_add_child_in_parent( local_cxy, |
---|
188 | INODE_TYPE_DEV, |
---|
189 | FS_TYPE_DEVFS, |
---|
190 | *devfs_internal_inode_xp, |
---|
191 | chdev_ptr->name, |
---|
192 | GET_PTR( chdev_xp ), |
---|
193 | &inode_xp ); |
---|
194 | } |
---|
195 | } |
---|
196 | |
---|
197 | // create an IOB inode in cluster containing IOB chdev |
---|
198 | chdev_xp = chdev_dir.iob; |
---|
199 | if( chdev_xp != XPTR_NULL ) |
---|
200 | { |
---|
201 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
202 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
---|
203 | if( chdev_cxy == local_cxy ) |
---|
204 | { |
---|
205 | vfs_add_child_in_parent( local_cxy, |
---|
206 | INODE_TYPE_DEV, |
---|
207 | FS_TYPE_DEVFS, |
---|
208 | devfs_external_inode_xp, |
---|
209 | chdev_ptr->name, |
---|
210 | GET_PTR( chdev_xp ), |
---|
211 | &inode_xp ); |
---|
212 | } |
---|
213 | } |
---|
214 | |
---|
215 | // create a PIC inode in cluster containing PIC chdev |
---|
216 | chdev_xp = chdev_dir.pic; |
---|
217 | if( chdev_xp != XPTR_NULL ) |
---|
218 | { |
---|
219 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
220 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
---|
221 | if( chdev_cxy == local_cxy ) |
---|
222 | { |
---|
223 | vfs_add_child_in_parent( local_cxy, |
---|
224 | INODE_TYPE_DEV, |
---|
225 | FS_TYPE_DEVFS, |
---|
226 | devfs_external_inode_xp, |
---|
227 | chdev_ptr->name, |
---|
228 | GET_PTR( chdev_xp ), |
---|
229 | &inode_xp ); |
---|
230 | } |
---|
231 | } |
---|
232 | |
---|
233 | // create a TXT_RX inode in each cluster containing a TXT_RX chdev |
---|
234 | for( channel = 0 ; channel < CONFIG_MAX_TXT_CHANNELS ; channel++ ) |
---|
235 | { |
---|
236 | chdev_xp = chdev_dir.txt_rx[channel]; |
---|
237 | if( chdev_xp != XPTR_NULL ) |
---|
238 | { |
---|
239 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
240 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
---|
241 | if( chdev_cxy == local_cxy ) |
---|
242 | { |
---|
243 | vfs_add_child_in_parent( local_cxy, |
---|
244 | INODE_TYPE_DEV, |
---|
245 | FS_TYPE_DEVFS, |
---|
246 | devfs_external_inode_xp, |
---|
247 | chdev_ptr->name, |
---|
248 | GET_PTR( chdev_xp ), |
---|
249 | &inode_xp ); |
---|
250 | } |
---|
251 | } |
---|
252 | } |
---|
253 | |
---|
254 | // create a TXT_TX inode in each cluster containing a TXT_TX chdev |
---|
255 | for( channel = 0 ; channel < CONFIG_MAX_TXT_CHANNELS ; channel++ ) |
---|
256 | { |
---|
257 | chdev_xp = chdev_dir.txt_tx[channel]; |
---|
258 | if( chdev_xp != XPTR_NULL ) |
---|
259 | { |
---|
260 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
261 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
---|
262 | if( chdev_cxy == local_cxy ) |
---|
263 | { |
---|
264 | vfs_add_child_in_parent( local_cxy, |
---|
265 | INODE_TYPE_DEV, |
---|
266 | FS_TYPE_DEVFS, |
---|
267 | devfs_external_inode_xp, |
---|
268 | chdev_ptr->name, |
---|
269 | GET_PTR( chdev_xp ), |
---|
270 | &inode_xp ); |
---|
271 | } |
---|
272 | } |
---|
273 | } |
---|
274 | |
---|
275 | // create an IOC inode in each cluster containing an IOC chdev |
---|
276 | for( channel = 0 ; channel < CONFIG_MAX_IOC_CHANNELS ; channel++ ) |
---|
277 | { |
---|
278 | chdev_xp = chdev_dir.ioc[channel]; |
---|
279 | if( chdev_xp != XPTR_NULL ) |
---|
280 | { |
---|
281 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
282 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
---|
283 | if( chdev_cxy == local_cxy ) |
---|
284 | { |
---|
285 | vfs_add_child_in_parent( local_cxy, |
---|
286 | INODE_TYPE_DEV, |
---|
287 | FS_TYPE_DEVFS, |
---|
288 | devfs_external_inode_xp, |
---|
289 | chdev_ptr->name, |
---|
290 | GET_PTR( chdev_xp ), |
---|
291 | &inode_xp ); |
---|
292 | } |
---|
293 | } |
---|
294 | } |
---|
295 | |
---|
296 | // create a FBF inode in each cluster containing a FBF chdev |
---|
297 | for( channel = 0 ; channel < CONFIG_MAX_IOC_CHANNELS ; channel++ ) |
---|
298 | { |
---|
299 | chdev_xp = chdev_dir.fbf[channel]; |
---|
300 | if( chdev_xp != XPTR_NULL ) |
---|
301 | { |
---|
302 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
303 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
---|
304 | if( chdev_cxy == local_cxy ) |
---|
305 | { |
---|
306 | vfs_add_child_in_parent( local_cxy, |
---|
307 | INODE_TYPE_DEV, |
---|
308 | FS_TYPE_DEVFS, |
---|
309 | devfs_external_inode_xp, |
---|
310 | chdev_ptr->name, |
---|
311 | GET_PTR( chdev_xp ), |
---|
312 | &inode_xp ); |
---|
313 | } |
---|
314 | } |
---|
315 | } |
---|
316 | |
---|
317 | // create a NIC_RX inode in each cluster containing a NIC_RX chdev |
---|
318 | for( channel = 0 ; channel < CONFIG_MAX_NIC_CHANNELS ; channel++ ) |
---|
319 | { |
---|
320 | chdev_xp = chdev_dir.nic_rx[channel]; |
---|
321 | if( chdev_xp != XPTR_NULL ) |
---|
322 | { |
---|
323 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
324 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
---|
325 | if( chdev_cxy == local_cxy ) |
---|
326 | { |
---|
327 | vfs_add_child_in_parent( local_cxy, |
---|
328 | INODE_TYPE_DEV, |
---|
329 | FS_TYPE_DEVFS, |
---|
330 | devfs_external_inode_xp, |
---|
331 | chdev_ptr->name, |
---|
332 | GET_PTR( chdev_xp ), |
---|
333 | &inode_xp ); |
---|
334 | } |
---|
335 | } |
---|
336 | } |
---|
337 | |
---|
338 | // create a NIC_TX inode in each cluster containing a NIC_TX chdev |
---|
339 | for( channel = 0 ; channel < CONFIG_MAX_NIC_CHANNELS ; channel++ ) |
---|
340 | { |
---|
341 | chdev_xp = chdev_dir.nic_tx[channel]; |
---|
342 | if( chdev_xp != XPTR_NULL ) |
---|
343 | { |
---|
344 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
345 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
---|
346 | if( chdev_cxy == local_cxy ) |
---|
347 | { |
---|
348 | vfs_add_child_in_parent( local_cxy, |
---|
349 | INODE_TYPE_DEV, |
---|
350 | FS_TYPE_DEVFS, |
---|
351 | devfs_external_inode_xp, |
---|
352 | chdev_ptr->name, |
---|
353 | GET_PTR( chdev_xp ), |
---|
354 | &inode_xp ); |
---|
355 | } |
---|
356 | } |
---|
357 | } |
---|
358 | |
---|
359 | #if DEBUG_DEVFS_INIT |
---|
360 | cycle = (uint32_t)hal_get_cycles(); |
---|
361 | if( DEBUG_DEVFS_INIT < cycle ) |
---|
362 | printk("\n[DBG] %s : thread %x exit at cycle %d\n", |
---|
363 | __FUNCTION__ , CURRENT_THREAD , cycle ); |
---|
364 | #endif |
---|
365 | |
---|
366 | } // end devfs_local_init() |
---|
367 | |
---|
368 | ////////////////////////////////////////// |
---|
369 | int devfs_user_move( bool_t to_buffer, |
---|
370 | xptr_t file_xp, |
---|
371 | void * u_buf, |
---|
372 | uint32_t size ) |
---|
373 | { |
---|
374 | assert( ( file_xp != XPTR_NULL ) , "file_xp == XPTR_NULL" ); |
---|
375 | |
---|
376 | assert( ( size < CONFIG_TXT_KBUF_SIZE ) , "string size too large" ); |
---|
377 | |
---|
378 | xptr_t chdev_xp; |
---|
379 | cxy_t chdev_cxy; |
---|
380 | chdev_t * chdev_ptr; // associated chdev type |
---|
381 | uint32_t func; // chdev functionnal type |
---|
382 | uint32_t channel; // chdev channel index |
---|
383 | error_t error; |
---|
384 | |
---|
385 | char k_buf[CONFIG_TXT_KBUF_SIZE]; // local kernel buffer |
---|
386 | |
---|
387 | #if (DEBUG_SYS_READ & 1) |
---|
388 | enter_devfs_read = hal_time_stamp(); |
---|
389 | #endif |
---|
390 | |
---|
391 | #if (DEBUG_SYS_WRITE & 1) |
---|
392 | enter_devfs_write = hal_time_stamp(); |
---|
393 | #endif |
---|
394 | |
---|
395 | #if DEBUG_DEVFS_MOVE |
---|
396 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
397 | if( DEBUG_DEVFS_MOVE < cycle ) |
---|
398 | printk("\n[DBG] %s : thread %x enter / to_mem %d / cycle %d\n", |
---|
399 | __FUNCTION__ , CURRENT_THREAD , to_buffer , cycle ); |
---|
400 | #endif |
---|
401 | |
---|
402 | // get extended pointer on chdev_xp |
---|
403 | chdev_xp = chdev_from_file( file_xp ); |
---|
404 | |
---|
405 | // get cluster and local pointer on chdev |
---|
406 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
407 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
---|
408 | |
---|
409 | // get chdev functionnal type and channel |
---|
410 | func = hal_remote_lw( XPTR( chdev_cxy , &chdev_ptr->func ) ); |
---|
411 | channel = hal_remote_lw( XPTR( chdev_cxy , &chdev_ptr->channel ) ); |
---|
412 | |
---|
413 | // action depends on "func" and "to_buffer" |
---|
414 | if( func == DEV_FUNC_TXT ) |
---|
415 | { |
---|
416 | if( to_buffer ) // TXT read |
---|
417 | { |
---|
418 | uint32_t i; |
---|
419 | for( i = 0 ; i < size ; i++ ) |
---|
420 | { |
---|
421 | error = dev_txt_read( channel , &k_buf[i] ); |
---|
422 | |
---|
423 | if( error ) |
---|
424 | { |
---|
425 | return -1; |
---|
426 | } |
---|
427 | else |
---|
428 | { |
---|
429 | hal_strcpy_to_uspace( u_buf , k_buf , size ); |
---|
430 | } |
---|
431 | } |
---|
432 | |
---|
433 | #if DEBUG_DEVFS_MOVE |
---|
434 | cycle = (uint32_t)hal_get_cycles(); |
---|
435 | if( DEBUG_DEVFS_MOVE < cycle ) |
---|
436 | printk("\n[DBG] %s : thread %x exit / to_mem %d / cycle %d\n", |
---|
437 | __FUNCTION__ , CURRENT_THREAD , to_buffer / cycle ); |
---|
438 | #endif |
---|
439 | |
---|
440 | #if (DEBUG_SYS_READ & 1) |
---|
441 | exit_devfs_read = hal_time_stamp(); |
---|
442 | #endif |
---|
443 | return size; |
---|
444 | } |
---|
445 | else // TXT write |
---|
446 | { |
---|
447 | hal_strcpy_from_uspace( k_buf , u_buf , size ); |
---|
448 | |
---|
449 | error = dev_txt_write( channel , k_buf , size ); |
---|
450 | if( error ) |
---|
451 | { |
---|
452 | return -1; |
---|
453 | } |
---|
454 | else |
---|
455 | { |
---|
456 | |
---|
457 | #if DEBUG_DEVFS_MOVE |
---|
458 | cycle = (uint32_t)hal_get_cycles(); |
---|
459 | if( DEBUG_DEVFS_MOVE < cycle ) |
---|
460 | printk("\n[DBG] %s : thread %x exit / to_mem %d / cycle %d\n", |
---|
461 | __FUNCTION__ , CURRENT_THREAD , to_buffer / cycle ); |
---|
462 | #endif |
---|
463 | |
---|
464 | #if (DEBUG_SYS_WRITE & 1) |
---|
465 | exit_devfs_write = hal_time_stamp(); |
---|
466 | #endif |
---|
467 | return size; |
---|
468 | } |
---|
469 | } |
---|
470 | } |
---|
471 | else |
---|
472 | { |
---|
473 | assert( false , "%s does not support direct user access", |
---|
474 | chdev_func_str(func) ); |
---|
475 | |
---|
476 | return -1; |
---|
477 | } |
---|
478 | |
---|
479 | } // end devfs_user_move() |
---|
480 | |
---|
481 | |
---|