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staging: tidspbridge: remove OPTIONAL
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / staging / tidspbridge / rmgr / proc.c
blobbe137ad39a7cfd2bdb363629bb704deca09abf17
1 /*
2 * proc.c
3 *
4 * DSP-BIOS Bridge driver support functions for TI OMAP processors.
5 *
6 * Processor interface at the driver level.
7 *
8 * Copyright (C) 2005-2006 Texas Instruments, Inc.
9 *
10 * This package is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
16 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
17 */
18
19 #include <linux/types.h>
20 /* ------------------------------------ Host OS */
21 #include <linux/dma-mapping.h>
22 #include <linux/scatterlist.h>
23 #include <dspbridge/host_os.h>
24
25 /* ----------------------------------- DSP/BIOS Bridge */
26 #include <dspbridge/dbdefs.h>
27
28 /* ----------------------------------- Trace & Debug */
29 #include <dspbridge/dbc.h>
30
31 /* ----------------------------------- OS Adaptation Layer */
32 #include <dspbridge/cfg.h>
33 #include <dspbridge/list.h>
34 #include <dspbridge/ntfy.h>
35 #include <dspbridge/sync.h>
36 /* ----------------------------------- Bridge Driver */
37 #include <dspbridge/dspdefs.h>
38 #include <dspbridge/dspdeh.h>
39 /* ----------------------------------- Platform Manager */
40 #include <dspbridge/cod.h>
41 #include <dspbridge/dev.h>
42 #include <dspbridge/procpriv.h>
43 #include <dspbridge/dmm.h>
44
45 /* ----------------------------------- Resource Manager */
46 #include <dspbridge/mgr.h>
47 #include <dspbridge/node.h>
48 #include <dspbridge/nldr.h>
49 #include <dspbridge/rmm.h>
50
51 /* ----------------------------------- Others */
52 #include <dspbridge/dbdcd.h>
53 #include <dspbridge/msg.h>
54 #include <dspbridge/dspioctl.h>
55 #include <dspbridge/drv.h>
56
57 /* ----------------------------------- This */
58 #include <dspbridge/proc.h>
59 #include <dspbridge/pwr.h>
60
61 #include <dspbridge/resourcecleanup.h>
62 /* ----------------------------------- Defines, Data Structures, Typedefs */
63 #define MAXCMDLINELEN 255
64 #define PROC_ENVPROCID "PROC_ID=%d"
65 #define MAXPROCIDLEN (8 + 5)
66 #define PROC_DFLT_TIMEOUT 10000 /* Time out in milliseconds */
67 #define PWR_TIMEOUT 500 /* Sleep/wake timout in msec */
68 #define EXTEND "_EXT_END" /* Extmem end addr in DSP binary */
69
70 #define DSP_CACHE_LINE 128
71
72 #define BUFMODE_MASK (3 << 14)
73
74 /* Buffer modes from DSP perspective */
75 #define RBUF 0x4000 /* Input buffer */
76 #define WBUF 0x8000 /* Output Buffer */
77
78 extern struct device *bridge;
79
80 /* ----------------------------------- Globals */
81
82 /* The proc_object structure. */
83 struct proc_object {
84 struct list_head link; /* Link to next proc_object */
85 struct dev_object *hdev_obj; /* Device this PROC represents */
86 u32 process; /* Process owning this Processor */
87 struct mgr_object *hmgr_obj; /* Manager Object Handle */
88 u32 attach_count; /* Processor attach count */
89 u32 processor_id; /* Processor number */
90 u32 utimeout; /* Time out count */
91 enum dsp_procstate proc_state; /* Processor state */
92 u32 ul_unit; /* DDSP unit number */
93 bool is_already_attached; /*
94 * True if the Device below has
95 * GPP Client attached
96 */
97 struct ntfy_object *ntfy_obj; /* Manages notifications */
98 /* Bridge Context Handle */
99 struct bridge_dev_context *hbridge_context;
100 /* Function interface to Bridge driver */
101 struct bridge_drv_interface *intf_fxns;
102 char *psz_last_coff;
103 struct list_head proc_list;
104 };
105
106 static u32 refs;
107
108 DEFINE_MUTEX(proc_lock); /* For critical sections */
109
110 /* ----------------------------------- Function Prototypes */
111 static int proc_monitor(struct proc_object *proc_obj);
112 static s32 get_envp_count(char **envp);
113 static char **prepend_envp(char **new_envp, char **envp, s32 envp_elems,
114 s32 cnew_envp, char *sz_var);
115
116 /* remember mapping information */
117 static struct dmm_map_object *add_mapping_info(struct process_context *pr_ctxt,
118 u32 mpu_addr, u32 dsp_addr, u32 size)
119 {
120 struct dmm_map_object *map_obj;
121
122 u32 num_usr_pgs = size / PG_SIZE4K;
123
124 pr_debug("%s: adding map info: mpu_addr 0x%x virt 0x%x size 0x%x\n",
125 __func__, mpu_addr,
126 dsp_addr, size);
127
128 map_obj = kzalloc(sizeof(struct dmm_map_object), GFP_KERNEL);
129 if (!map_obj) {
130 pr_err("%s: kzalloc failed\n", __func__);
131 return NULL;
132 }
133 INIT_LIST_HEAD(&map_obj->link);
134
135 map_obj->pages = kcalloc(num_usr_pgs, sizeof(struct page *),
136 GFP_KERNEL);
137 if (!map_obj->pages) {
138 pr_err("%s: kzalloc failed\n", __func__);
139 kfree(map_obj);
140 return NULL;
141 }
142
143 map_obj->mpu_addr = mpu_addr;
144 map_obj->dsp_addr = dsp_addr;
145 map_obj->size = size;
146 map_obj->num_usr_pgs = num_usr_pgs;
147
148 spin_lock(&pr_ctxt->dmm_map_lock);
149 list_add(&map_obj->link, &pr_ctxt->dmm_map_list);
150 spin_unlock(&pr_ctxt->dmm_map_lock);
151
152 return map_obj;
153 }
154
155 static int match_exact_map_obj(struct dmm_map_object *map_obj,
156 u32 dsp_addr, u32 size)
157 {
158 if (map_obj->dsp_addr == dsp_addr && map_obj->size != size)
159 pr_err("%s: addr match (0x%x), size don't (0x%x != 0x%x)\n",
160 __func__, dsp_addr, map_obj->size, size);
161
162 return map_obj->dsp_addr == dsp_addr &&
163 map_obj->size == size;
164 }
165
166 static void remove_mapping_information(struct process_context *pr_ctxt,
167 u32 dsp_addr, u32 size)
168 {
169 struct dmm_map_object *map_obj;
170
171 pr_debug("%s: looking for virt 0x%x size 0x%x\n", __func__,
172 dsp_addr, size);
173
174 spin_lock(&pr_ctxt->dmm_map_lock);
175 list_for_each_entry(map_obj, &pr_ctxt->dmm_map_list, link) {
176 pr_debug("%s: candidate: mpu_addr 0x%x virt 0x%x size 0x%x\n",
177 __func__,
178 map_obj->mpu_addr,
179 map_obj->dsp_addr,
180 map_obj->size);
181
182 if (match_exact_map_obj(map_obj, dsp_addr, size)) {
183 pr_debug("%s: match, deleting map info\n", __func__);
184 list_del(&map_obj->link);
185 kfree(map_obj->dma_info.sg);
186 kfree(map_obj->pages);
187 kfree(map_obj);
188 goto out;
189 }
190 pr_debug("%s: candidate didn't match\n", __func__);
191 }
192
193 pr_err("%s: failed to find given map info\n", __func__);
194 out:
195 spin_unlock(&pr_ctxt->dmm_map_lock);
196 }
197
198 static int match_containing_map_obj(struct dmm_map_object *map_obj,
199 u32 mpu_addr, u32 size)
200 {
201 u32 map_obj_end = map_obj->mpu_addr + map_obj->size;
202
203 return mpu_addr >= map_obj->mpu_addr &&
204 mpu_addr + size <= map_obj_end;
205 }
206
207 static struct dmm_map_object *find_containing_mapping(
208 struct process_context *pr_ctxt,
209 u32 mpu_addr, u32 size)
210 {
211 struct dmm_map_object *map_obj;
212 pr_debug("%s: looking for mpu_addr 0x%x size 0x%x\n", __func__,
213 mpu_addr, size);
214
215 spin_lock(&pr_ctxt->dmm_map_lock);
216 list_for_each_entry(map_obj, &pr_ctxt->dmm_map_list, link) {
217 pr_debug("%s: candidate: mpu_addr 0x%x virt 0x%x size 0x%x\n",
218 __func__,
219 map_obj->mpu_addr,
220 map_obj->dsp_addr,
221 map_obj->size);
222 if (match_containing_map_obj(map_obj, mpu_addr, size)) {
223 pr_debug("%s: match!\n", __func__);
224 goto out;
225 }
226
227 pr_debug("%s: no match!\n", __func__);
228 }
229
230 map_obj = NULL;
231 out:
232 spin_unlock(&pr_ctxt->dmm_map_lock);
233 return map_obj;
234 }
235
236 static int find_first_page_in_cache(struct dmm_map_object *map_obj,
237 unsigned long mpu_addr)
238 {
239 u32 mapped_base_page = map_obj->mpu_addr >> PAGE_SHIFT;
240 u32 requested_base_page = mpu_addr >> PAGE_SHIFT;
241 int pg_index = requested_base_page - mapped_base_page;
242
243 if (pg_index < 0 || pg_index >= map_obj->num_usr_pgs) {
244 pr_err("%s: failed (got %d)\n", __func__, pg_index);
245 return -1;
246 }
247
248 pr_debug("%s: first page is %d\n", __func__, pg_index);
249 return pg_index;
250 }
251
252 static inline struct page *get_mapping_page(struct dmm_map_object *map_obj,
253 int pg_i)
254 {
255 pr_debug("%s: looking for pg_i %d, num_usr_pgs: %d\n", __func__,
256 pg_i, map_obj->num_usr_pgs);
257
258 if (pg_i < 0 || pg_i >= map_obj->num_usr_pgs) {
259 pr_err("%s: requested pg_i %d is out of mapped range\n",
260 __func__, pg_i);
261 return NULL;
262 }
263
264 return map_obj->pages[pg_i];
265 }
266
267 /*
268 * ======== proc_attach ========
269 * Purpose:
270 * Prepare for communication with a particular DSP processor, and return
271 * a handle to the processor object.
272 */
273 int
274 proc_attach(u32 processor_id,
275 const struct dsp_processorattrin *attr_in,
276 void **ph_processor, struct process_context *pr_ctxt)
277 {
278 int status = 0;
279 struct dev_object *hdev_obj;
280 struct proc_object *p_proc_object = NULL;
281 struct mgr_object *hmgr_obj = NULL;
282 struct drv_object *hdrv_obj = NULL;
283 u8 dev_type;
284
285 DBC_REQUIRE(refs > 0);
286 DBC_REQUIRE(ph_processor != NULL);
287
288 if (pr_ctxt->hprocessor) {
289 *ph_processor = pr_ctxt->hprocessor;
290 return status;
291 }
292
293 /* Get the Driver and Manager Object Handles */
294 status = cfg_get_object((u32 *) &hdrv_obj, REG_DRV_OBJECT);
295 if (DSP_SUCCEEDED(status))
296 status = cfg_get_object((u32 *) &hmgr_obj, REG_MGR_OBJECT);
297
298 if (DSP_SUCCEEDED(status)) {
299 /* Get the Device Object */
300 status = drv_get_dev_object(processor_id, hdrv_obj, &hdev_obj);
301 }
302 if (DSP_SUCCEEDED(status))
303 status = dev_get_dev_type(hdev_obj, &dev_type);
304
305 if (DSP_FAILED(status))
306 goto func_end;
307
308 /* If we made it this far, create the Proceesor object: */
309 p_proc_object = kzalloc(sizeof(struct proc_object), GFP_KERNEL);
310 /* Fill out the Processor Object: */
311 if (p_proc_object == NULL) {
312 status = -ENOMEM;
313 goto func_end;
314 }
315 p_proc_object->hdev_obj = hdev_obj;
316 p_proc_object->hmgr_obj = hmgr_obj;
317 p_proc_object->processor_id = dev_type;
318 /* Store TGID instead of process handle */
319 p_proc_object->process = current->tgid;
320
321 INIT_LIST_HEAD(&p_proc_object->proc_list);
322
323 if (attr_in)
324 p_proc_object->utimeout = attr_in->utimeout;
325 else
326 p_proc_object->utimeout = PROC_DFLT_TIMEOUT;
327
328 status = dev_get_intf_fxns(hdev_obj, &p_proc_object->intf_fxns);
329 if (DSP_SUCCEEDED(status)) {
330 status = dev_get_bridge_context(hdev_obj,
331 &p_proc_object->hbridge_context);
332 if (DSP_FAILED(status))
333 kfree(p_proc_object);
334 } else
335 kfree(p_proc_object);
336
337 if (DSP_FAILED(status))
338 goto func_end;
339
340 /* Create the Notification Object */
341 /* This is created with no event mask, no notify mask
342 * and no valid handle to the notification. They all get
343 * filled up when proc_register_notify is called */
344 p_proc_object->ntfy_obj = kmalloc(sizeof(struct ntfy_object),
345 GFP_KERNEL);
346 if (p_proc_object->ntfy_obj)
347 ntfy_init(p_proc_object->ntfy_obj);
348 else
349 status = -ENOMEM;
350
351 if (DSP_SUCCEEDED(status)) {
352 /* Insert the Processor Object into the DEV List.
353 * Return handle to this Processor Object:
354 * Find out if the Device is already attached to a
355 * Processor. If so, return AlreadyAttached status */
356 lst_init_elem(&p_proc_object->link);
357 status = dev_insert_proc_object(p_proc_object->hdev_obj,
358 (u32) p_proc_object,
359 &p_proc_object->
360 is_already_attached);
361 if (DSP_SUCCEEDED(status)) {
362 if (p_proc_object->is_already_attached)
363 status = 0;
364 } else {
365 if (p_proc_object->ntfy_obj) {
366 ntfy_delete(p_proc_object->ntfy_obj);
367 kfree(p_proc_object->ntfy_obj);
368 }
369
370 kfree(p_proc_object);
371 }
372 if (DSP_SUCCEEDED(status)) {
373 *ph_processor = (void *)p_proc_object;
374 pr_ctxt->hprocessor = *ph_processor;
375 (void)proc_notify_clients(p_proc_object,
376 DSP_PROCESSORATTACH);
377 }
378 } else {
379 /* Don't leak memory if DSP_FAILED */
380 kfree(p_proc_object);
381 }
382 func_end:
383 DBC_ENSURE((status == -EPERM && *ph_processor == NULL) ||
384 (DSP_SUCCEEDED(status) && p_proc_object) ||
385 (status == 0 && p_proc_object));
386
387 return status;
388 }
389
390 static int get_exec_file(struct cfg_devnode *dev_node_obj,
391 struct dev_object *hdev_obj,
392 u32 size, char *exec_file)
393 {
394 u8 dev_type;
395 s32 len;
396
397 dev_get_dev_type(hdev_obj, (u8 *) &dev_type);
398 if (dev_type == DSP_UNIT) {
399 return cfg_get_exec_file(dev_node_obj, size, exec_file);
400 } else if (dev_type == IVA_UNIT) {
401 if (iva_img) {
402 len = strlen(iva_img);
403 strncpy(exec_file, iva_img, len + 1);
404 return 0;
405 }
406 }
407 return -ENOENT;
408 }
409
410 /*
411 * ======== proc_auto_start ======== =
412 * Purpose:
413 * A Particular device gets loaded with the default image
414 * if the AutoStart flag is set.
415 * Parameters:
416 * hdev_obj: Handle to the Device
417 * Returns:
418 * 0: On Successful Loading
419 * -EPERM General Failure
420 * Requires:
421 * hdev_obj != NULL
422 * Ensures:
423 */
424 int proc_auto_start(struct cfg_devnode *dev_node_obj,
425 struct dev_object *hdev_obj)
426 {
427 int status = -EPERM;
428 struct proc_object *p_proc_object;
429 char sz_exec_file[MAXCMDLINELEN];
430 char *argv[2];
431 struct mgr_object *hmgr_obj = NULL;
432 u8 dev_type;
433
434 DBC_REQUIRE(refs > 0);
435 DBC_REQUIRE(dev_node_obj != NULL);
436 DBC_REQUIRE(hdev_obj != NULL);
437
438 /* Create a Dummy PROC Object */
439 status = cfg_get_object((u32 *) &hmgr_obj, REG_MGR_OBJECT);
440 if (DSP_FAILED(status))
441 goto func_end;
442
443 p_proc_object = kzalloc(sizeof(struct proc_object), GFP_KERNEL);
444 if (p_proc_object == NULL) {
445 status = -ENOMEM;
446 goto func_end;
447 }
448 p_proc_object->hdev_obj = hdev_obj;
449 p_proc_object->hmgr_obj = hmgr_obj;
450 status = dev_get_intf_fxns(hdev_obj, &p_proc_object->intf_fxns);
451 if (DSP_SUCCEEDED(status))
452 status = dev_get_bridge_context(hdev_obj,
453 &p_proc_object->hbridge_context);
454 if (DSP_FAILED(status))
455 goto func_cont;
456
457 /* Stop the Device, put it into standby mode */
458 status = proc_stop(p_proc_object);
459
460 if (DSP_FAILED(status))
461 goto func_cont;
462
463 /* Get the default executable for this board... */
464 dev_get_dev_type(hdev_obj, (u8 *) &dev_type);
465 p_proc_object->processor_id = dev_type;
466 status = get_exec_file(dev_node_obj, hdev_obj, sizeof(sz_exec_file),
467 sz_exec_file);
468 if (DSP_SUCCEEDED(status)) {
469 argv[0] = sz_exec_file;
470 argv[1] = NULL;
471 /* ...and try to load it: */
472 status = proc_load(p_proc_object, 1, (const char **)argv, NULL);
473 if (DSP_SUCCEEDED(status))
474 status = proc_start(p_proc_object);
475 }
476 kfree(p_proc_object->psz_last_coff);
477 p_proc_object->psz_last_coff = NULL;
478 func_cont:
479 kfree(p_proc_object);
480 func_end:
481 return status;
482 }
483
484 /*
485 * ======== proc_ctrl ========
486 * Purpose:
487 * Pass control information to the GPP device driver managing the
488 * DSP processor.
489 *
490 * This will be an OEM-only function, and not part of the DSP/BIOS Bridge
491 * application developer's API.
492 * Call the bridge_dev_ctrl fxn with the Argument. This is a Synchronous
493 * Operation. arg can be null.
494 */
495 int proc_ctrl(void *hprocessor, u32 dw_cmd, struct dsp_cbdata * arg)
496 {
497 int status = 0;
498 struct proc_object *p_proc_object = hprocessor;
499 u32 timeout = 0;
500
501 DBC_REQUIRE(refs > 0);
502
503 if (p_proc_object) {
504 /* intercept PWR deep sleep command */
505 if (dw_cmd == BRDIOCTL_DEEPSLEEP) {
506 timeout = arg->cb_data;
507 status = pwr_sleep_dsp(PWR_DEEPSLEEP, timeout);
508 }
509 /* intercept PWR emergency sleep command */
510 else if (dw_cmd == BRDIOCTL_EMERGENCYSLEEP) {
511 timeout = arg->cb_data;
512 status = pwr_sleep_dsp(PWR_EMERGENCYDEEPSLEEP, timeout);
513 } else if (dw_cmd == PWR_DEEPSLEEP) {
514 /* timeout = arg->cb_data; */
515 status = pwr_sleep_dsp(PWR_DEEPSLEEP, timeout);
516 }
517 /* intercept PWR wake commands */
518 else if (dw_cmd == BRDIOCTL_WAKEUP) {
519 timeout = arg->cb_data;
520 status = pwr_wake_dsp(timeout);
521 } else if (dw_cmd == PWR_WAKEUP) {
522 /* timeout = arg->cb_data; */
523 status = pwr_wake_dsp(timeout);
524 } else
525 if (DSP_SUCCEEDED((*p_proc_object->intf_fxns->pfn_dev_cntrl)
526 (p_proc_object->hbridge_context, dw_cmd,
527 arg))) {
528 status = 0;
529 } else {
530 status = -EPERM;
531 }
532 } else {
533 status = -EFAULT;
534 }
535
536 return status;
537 }
538
539 /*
540 * ======== proc_detach ========
541 * Purpose:
542 * Destroys the Processor Object. Removes the notification from the Dev
543 * List.
544 */
545 int proc_detach(struct process_context *pr_ctxt)
546 {
547 int status = 0;
548 struct proc_object *p_proc_object = NULL;
549
550 DBC_REQUIRE(refs > 0);
551
552 p_proc_object = (struct proc_object *)pr_ctxt->hprocessor;
553
554 if (p_proc_object) {
555 /* Notify the Client */
556 ntfy_notify(p_proc_object->ntfy_obj, DSP_PROCESSORDETACH);
557 /* Remove the notification memory */
558 if (p_proc_object->ntfy_obj) {
559 ntfy_delete(p_proc_object->ntfy_obj);
560 kfree(p_proc_object->ntfy_obj);
561 }
562
563 kfree(p_proc_object->psz_last_coff);
564 p_proc_object->psz_last_coff = NULL;
565 /* Remove the Proc from the DEV List */
566 (void)dev_remove_proc_object(p_proc_object->hdev_obj,
567 (u32) p_proc_object);
568 /* Free the Processor Object */
569 kfree(p_proc_object);
570 pr_ctxt->hprocessor = NULL;
571 } else {
572 status = -EFAULT;
573 }
574
575 return status;
576 }
577
578 /*
579 * ======== proc_enum_nodes ========
580 * Purpose:
581 * Enumerate and get configuration information about nodes allocated
582 * on a DSP processor.
583 */
584 int proc_enum_nodes(void *hprocessor, void **node_tab,
585 u32 node_tab_size, OUT u32 *pu_num_nodes,
586 OUT u32 *pu_allocated)
587 {
588 int status = -EPERM;
589 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
590 struct node_mgr *hnode_mgr = NULL;
591
592 DBC_REQUIRE(refs > 0);
593 DBC_REQUIRE(node_tab != NULL || node_tab_size == 0);
594 DBC_REQUIRE(pu_num_nodes != NULL);
595 DBC_REQUIRE(pu_allocated != NULL);
596
597 if (p_proc_object) {
598 if (DSP_SUCCEEDED(dev_get_node_manager(p_proc_object->hdev_obj,
599 &hnode_mgr))) {
600 if (hnode_mgr) {
601 status = node_enum_nodes(hnode_mgr, node_tab,
602 node_tab_size,
603 pu_num_nodes,
604 pu_allocated);
605 }
606 }
607 } else {
608 status = -EFAULT;
609 }
610
611 return status;
612 }
613
614 /* Cache operation against kernel address instead of users */
615 static int build_dma_sg(struct dmm_map_object *map_obj, unsigned long start,
616 ssize_t len, int pg_i)
617 {
618 struct page *page;
619 unsigned long offset;
620 ssize_t rest;
621 int ret = 0, i = 0;
622 struct scatterlist *sg = map_obj->dma_info.sg;
623
624 while (len) {
625 page = get_mapping_page(map_obj, pg_i);
626 if (!page) {
627 pr_err("%s: no page for %08lx\n", __func__, start);
628 ret = -EINVAL;
629 goto out;
630 } else if (IS_ERR(page)) {
631 pr_err("%s: err page for %08lx(%lu)\n", __func__, start,
632 PTR_ERR(page));
633 ret = PTR_ERR(page);
634 goto out;
635 }
636
637 offset = start & ~PAGE_MASK;
638 rest = min_t(ssize_t, PAGE_SIZE - offset, len);
639
640 sg_set_page(&sg[i], page, rest, offset);
641
642 len -= rest;
643 start += rest;
644 pg_i++, i++;
645 }
646
647 if (i != map_obj->dma_info.num_pages) {
648 pr_err("%s: bad number of sg iterations\n", __func__);
649 ret = -EFAULT;
650 goto out;
651 }
652
653 out:
654 return ret;
655 }
656
657 static int memory_regain_ownership(struct dmm_map_object *map_obj,
658 unsigned long start, ssize_t len, enum dma_data_direction dir)
659 {
660 int ret = 0;
661 unsigned long first_data_page = start >> PAGE_SHIFT;
662 unsigned long last_data_page = ((u32)(start + len - 1) >> PAGE_SHIFT);
663 /* calculating the number of pages this area spans */
664 unsigned long num_pages = last_data_page - first_data_page + 1;
665 struct bridge_dma_map_info *dma_info = &map_obj->dma_info;
666
667 if (!dma_info->sg)
668 goto out;
669
670 if (dma_info->dir != dir || dma_info->num_pages != num_pages) {
671 pr_err("%s: dma info doesn't match given params\n", __func__);
672 return -EINVAL;
673 }
674
675 dma_unmap_sg(bridge, dma_info->sg, num_pages, dma_info->dir);
676
677 pr_debug("%s: dma_map_sg unmapped\n", __func__);
678
679 kfree(dma_info->sg);
680
681 map_obj->dma_info.sg = NULL;
682
683 out:
684 return ret;
685 }
686
687 /* Cache operation against kernel address instead of users */
688 static int memory_give_ownership(struct dmm_map_object *map_obj,
689 unsigned long start, ssize_t len, enum dma_data_direction dir)
690 {
691 int pg_i, ret, sg_num;
692 struct scatterlist *sg;
693 unsigned long first_data_page = start >> PAGE_SHIFT;
694 unsigned long last_data_page = ((u32)(start + len - 1) >> PAGE_SHIFT);
695 /* calculating the number of pages this area spans */
696 unsigned long num_pages = last_data_page - first_data_page + 1;
697
698 pg_i = find_first_page_in_cache(map_obj, start);
699 if (pg_i < 0) {
700 pr_err("%s: failed to find first page in cache\n", __func__);
701 ret = -EINVAL;
702 goto out;
703 }
704
705 sg = kcalloc(num_pages, sizeof(*sg), GFP_KERNEL);
706 if (!sg) {
707 pr_err("%s: kcalloc failed\n", __func__);
708 ret = -ENOMEM;
709 goto out;
710 }
711
712 sg_init_table(sg, num_pages);
713
714 /* cleanup a previous sg allocation */
715 /* this may happen if application doesn't signal for e/o DMA */
716 kfree(map_obj->dma_info.sg);
717
718 map_obj->dma_info.sg = sg;
719 map_obj->dma_info.dir = dir;
720 map_obj->dma_info.num_pages = num_pages;
721
722 ret = build_dma_sg(map_obj, start, len, pg_i);
723 if (ret)
724 goto kfree_sg;
725
726 sg_num = dma_map_sg(bridge, sg, num_pages, dir);
727 if (sg_num < 1) {
728 pr_err("%s: dma_map_sg failed: %d\n", __func__, sg_num);
729 ret = -EFAULT;
730 goto kfree_sg;
731 }
732
733 pr_debug("%s: dma_map_sg mapped %d elements\n", __func__, sg_num);
734 map_obj->dma_info.sg_num = sg_num;
735
736 return 0;
737
738 kfree_sg:
739 kfree(sg);
740 map_obj->dma_info.sg = NULL;
741 out:
742 return ret;
743 }
744
745 int proc_begin_dma(void *hprocessor, void *pmpu_addr, u32 ul_size,
746 enum dma_data_direction dir)
747 {
748 /* Keep STATUS here for future additions to this function */
749 int status = 0;
750 struct process_context *pr_ctxt = (struct process_context *) hprocessor;
751 struct dmm_map_object *map_obj;
752
753 DBC_REQUIRE(refs > 0);
754
755 if (!pr_ctxt) {
756 status = -EFAULT;
757 goto err_out;
758 }
759
760 pr_debug("%s: addr 0x%x, size 0x%x, type %d\n", __func__,
761 (u32)pmpu_addr,
762 ul_size, dir);
763
764 /* find requested memory are in cached mapping information */
765 map_obj = find_containing_mapping(pr_ctxt, (u32) pmpu_addr, ul_size);
766 if (!map_obj) {
767 pr_err("%s: find_containing_mapping failed\n", __func__);
768 status = -EFAULT;
769 goto err_out;
770 }
771
772 if (memory_give_ownership(map_obj, (u32) pmpu_addr, ul_size, dir)) {
773 pr_err("%s: InValid address parameters %p %x\n",
774 __func__, pmpu_addr, ul_size);
775 status = -EFAULT;
776 }
777
778 err_out:
779
780 return status;
781 }
782
783 int proc_end_dma(void *hprocessor, void *pmpu_addr, u32 ul_size,
784 enum dma_data_direction dir)
785 {
786 /* Keep STATUS here for future additions to this function */
787 int status = 0;
788 struct process_context *pr_ctxt = (struct process_context *) hprocessor;
789 struct dmm_map_object *map_obj;
790
791 DBC_REQUIRE(refs > 0);
792
793 if (!pr_ctxt) {
794 status = -EFAULT;
795 goto err_out;
796 }
797
798 pr_debug("%s: addr 0x%x, size 0x%x, type %d\n", __func__,
799 (u32)pmpu_addr,
800 ul_size, dir);
801
802 /* find requested memory are in cached mapping information */
803 map_obj = find_containing_mapping(pr_ctxt, (u32) pmpu_addr, ul_size);
804 if (!map_obj) {
805 pr_err("%s: find_containing_mapping failed\n", __func__);
806 status = -EFAULT;
807 goto err_out;
808 }
809
810 if (memory_regain_ownership(map_obj, (u32) pmpu_addr, ul_size, dir)) {
811 pr_err("%s: InValid address parameters %p %x\n",
812 __func__, pmpu_addr, ul_size);
813 status = -EFAULT;
814 goto err_out;
815 }
816
817 err_out:
818 return status;
819 }
820
821 /*
822 * ======== proc_flush_memory ========
823 * Purpose:
824 * Flush cache
825 */
826 int proc_flush_memory(void *hprocessor, void *pmpu_addr,
827 u32 ul_size, u32 ul_flags)
828 {
829 enum dma_data_direction dir = DMA_BIDIRECTIONAL;
830
831 return proc_begin_dma(hprocessor, pmpu_addr, ul_size, dir);
832 }
833
834 /*
835 * ======== proc_invalidate_memory ========
836 * Purpose:
837 * Invalidates the memory specified
838 */
839 int proc_invalidate_memory(void *hprocessor, void *pmpu_addr, u32 size)
840 {
841 enum dma_data_direction dir = DMA_FROM_DEVICE;
842
843 return proc_begin_dma(hprocessor, pmpu_addr, size, dir);
844 }
845
846 /*
847 * ======== proc_get_resource_info ========
848 * Purpose:
849 * Enumerate the resources currently available on a processor.
850 */
851 int proc_get_resource_info(void *hprocessor, u32 resource_type,
852 OUT struct dsp_resourceinfo *resource_info,
853 u32 resource_info_size)
854 {
855 int status = -EPERM;
856 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
857 struct node_mgr *hnode_mgr = NULL;
858 struct nldr_object *nldr_obj = NULL;
859 struct rmm_target_obj *rmm = NULL;
860 struct io_mgr *hio_mgr = NULL; /* IO manager handle */
861
862 DBC_REQUIRE(refs > 0);
863 DBC_REQUIRE(resource_info != NULL);
864 DBC_REQUIRE(resource_info_size >= sizeof(struct dsp_resourceinfo));
865
866 if (!p_proc_object) {
867 status = -EFAULT;
868 goto func_end;
869 }
870 switch (resource_type) {
871 case DSP_RESOURCE_DYNDARAM:
872 case DSP_RESOURCE_DYNSARAM:
873 case DSP_RESOURCE_DYNEXTERNAL:
874 case DSP_RESOURCE_DYNSRAM:
875 status = dev_get_node_manager(p_proc_object->hdev_obj,
876 &hnode_mgr);
877 if (!hnode_mgr) {
878 status = -EFAULT;
879 goto func_end;
880 }
881
882 status = node_get_nldr_obj(hnode_mgr, &nldr_obj);
883 if (DSP_SUCCEEDED(status)) {
884 status = nldr_get_rmm_manager(nldr_obj, &rmm);
885 if (rmm) {
886 if (!rmm_stat(rmm,
887 (enum dsp_memtype)resource_type,
888 (struct dsp_memstat *)
889 &(resource_info->result.
890 mem_stat)))
891 status = -EINVAL;
892 } else {
893 status = -EFAULT;
894 }
895 }
896 break;
897 case DSP_RESOURCE_PROCLOAD:
898 status = dev_get_io_mgr(p_proc_object->hdev_obj, &hio_mgr);
899 if (hio_mgr)
900 status =
901 p_proc_object->intf_fxns->
902 pfn_io_get_proc_load(hio_mgr,
903 (struct dsp_procloadstat *)
904 &(resource_info->result.
905 proc_load_stat));
906 else
907 status = -EFAULT;
908 break;
909 default:
910 status = -EPERM;
911 break;
912 }
913 func_end:
914 return status;
915 }
916
917 /*
918 * ======== proc_exit ========
919 * Purpose:
920 * Decrement reference count, and free resources when reference count is
921 * 0.
922 */
923 void proc_exit(void)
924 {
925 DBC_REQUIRE(refs > 0);
926
927 refs--;
928
929 DBC_ENSURE(refs >= 0);
930 }
931
932 /*
933 * ======== proc_get_dev_object ========
934 * Purpose:
935 * Return the Dev Object handle for a given Processor.
936 *
937 */
938 int proc_get_dev_object(void *hprocessor,
939 struct dev_object **device_obj)
940 {
941 int status = -EPERM;
942 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
943
944 DBC_REQUIRE(refs > 0);
945 DBC_REQUIRE(device_obj != NULL);
946
947 if (p_proc_object) {
948 *device_obj = p_proc_object->hdev_obj;
949 status = 0;
950 } else {
951 *device_obj = NULL;
952 status = -EFAULT;
953 }
954
955 DBC_ENSURE((DSP_SUCCEEDED(status) && *device_obj != NULL) ||
956 (DSP_FAILED(status) && *device_obj == NULL));
957
958 return status;
959 }
960
961 /*
962 * ======== proc_get_state ========
963 * Purpose:
964 * Report the state of the specified DSP processor.
965 */
966 int proc_get_state(void *hprocessor,
967 OUT struct dsp_processorstate *proc_state_obj,
968 u32 state_info_size)
969 {
970 int status = 0;
971 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
972 int brd_status;
973
974 DBC_REQUIRE(refs > 0);
975 DBC_REQUIRE(proc_state_obj != NULL);
976 DBC_REQUIRE(state_info_size >= sizeof(struct dsp_processorstate));
977
978 if (p_proc_object) {
979 /* First, retrieve BRD state information */
980 status = (*p_proc_object->intf_fxns->pfn_brd_status)
981 (p_proc_object->hbridge_context, &brd_status);
982 if (DSP_SUCCEEDED(status)) {
983 switch (brd_status) {
984 case BRD_STOPPED:
985 proc_state_obj->proc_state = PROC_STOPPED;
986 break;
987 case BRD_SLEEP_TRANSITION:
988 case BRD_DSP_HIBERNATION:
989 /* Fall through */
990 case BRD_RUNNING:
991 proc_state_obj->proc_state = PROC_RUNNING;
992 break;
993 case BRD_LOADED:
994 proc_state_obj->proc_state = PROC_LOADED;
995 break;
996 case BRD_ERROR:
997 proc_state_obj->proc_state = PROC_ERROR;
998 break;
999 default:
1000 proc_state_obj->proc_state = 0xFF;
1001 status = -EPERM;
1002 break;
1003 }
1004 }
1005 } else {
1006 status = -EFAULT;
1007 }
1008 dev_dbg(bridge, "%s, results: status: 0x%x proc_state_obj: 0x%x\n",
1009 __func__, status, proc_state_obj->proc_state);
1010 return status;
1011 }
1012
1013 /*
1014 * ======== proc_get_trace ========
1015 * Purpose:
1016 * Retrieve the current contents of the trace buffer, located on the
1017 * Processor. Predefined symbols for the trace buffer must have been
1018 * configured into the DSP executable.
1019 * Details:
1020 * We support using the symbols SYS_PUTCBEG and SYS_PUTCEND to define a
1021 * trace buffer, only. Treat it as an undocumented feature.
1022 * This call is destructive, meaning the processor is placed in the monitor
1023 * state as a result of this function.
1024 */
1025 int proc_get_trace(void *hprocessor, u8 * pbuf, u32 max_size)
1026 {
1027 int status;
1028 status = -ENOSYS;
1029 return status;
1030 }
1031
1032 /*
1033 * ======== proc_init ========
1034 * Purpose:
1035 * Initialize PROC's private state, keeping a reference count on each call
1036 */
1037 bool proc_init(void)
1038 {
1039 bool ret = true;
1040
1041 DBC_REQUIRE(refs >= 0);
1042
1043 if (ret)
1044 refs++;
1045
1046 DBC_ENSURE((ret && (refs > 0)) || (!ret && (refs >= 0)));
1047
1048 return ret;
1049 }
1050
1051 /*
1052 * ======== proc_load ========
1053 * Purpose:
1054 * Reset a processor and load a new base program image.
1055 * This will be an OEM-only function, and not part of the DSP/BIOS Bridge
1056 * application developer's API.
1057 */
1058 int proc_load(void *hprocessor, const s32 argc_index,
1059 const char **user_args, const char **user_envp)
1060 {
1061 int status = 0;
1062 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
1063 struct io_mgr *hio_mgr; /* IO manager handle */
1064 struct msg_mgr *hmsg_mgr;
1065 struct cod_manager *cod_mgr; /* Code manager handle */
1066 char *pargv0; /* temp argv[0] ptr */
1067 char **new_envp; /* Updated envp[] array. */
1068 char sz_proc_id[MAXPROCIDLEN]; /* Size of "PROC_ID=<n>" */
1069 s32 envp_elems; /* Num elements in envp[]. */
1070 s32 cnew_envp; /* " " in new_envp[] */
1071 s32 nproc_id = 0; /* Anticipate MP version. */
1072 struct dcd_manager *hdcd_handle;
1073 struct dmm_object *dmm_mgr;
1074 u32 dw_ext_end;
1075 u32 proc_id;
1076 int brd_state;
1077 struct drv_data *drv_datap = dev_get_drvdata(bridge);
1078
1079 #ifdef OPT_LOAD_TIME_INSTRUMENTATION
1080 struct timeval tv1;
1081 struct timeval tv2;
1082 #endif
1083
1084 #if defined(CONFIG_TIDSPBRIDGE_DVFS) && !defined(CONFIG_CPU_FREQ)
1085 struct dspbridge_platform_data *pdata =
1086 omap_dspbridge_dev->dev.platform_data;
1087 #endif
1088
1089 DBC_REQUIRE(refs > 0);
1090 DBC_REQUIRE(argc_index > 0);
1091 DBC_REQUIRE(user_args != NULL);
1092
1093 #ifdef OPT_LOAD_TIME_INSTRUMENTATION
1094 do_gettimeofday(&tv1);
1095 #endif
1096 if (!p_proc_object) {
1097 status = -EFAULT;
1098 goto func_end;
1099 }
1100 dev_get_cod_mgr(p_proc_object->hdev_obj, &cod_mgr);
1101 if (!cod_mgr) {
1102 status = -EPERM;
1103 goto func_end;
1104 }
1105 status = proc_stop(hprocessor);
1106 if (DSP_FAILED(status))
1107 goto func_end;
1108
1109 /* Place the board in the monitor state. */
1110 status = proc_monitor(hprocessor);
1111 if (DSP_FAILED(status))
1112 goto func_end;
1113
1114 /* Save ptr to original argv[0]. */
1115 pargv0 = (char *)user_args[0];
1116 /*Prepend "PROC_ID=<nproc_id>"to envp array for target. */
1117 envp_elems = get_envp_count((char **)user_envp);
1118 cnew_envp = (envp_elems ? (envp_elems + 1) : (envp_elems + 2));
1119 new_envp = kzalloc(cnew_envp * sizeof(char **), GFP_KERNEL);
1120 if (new_envp) {
1121 status = snprintf(sz_proc_id, MAXPROCIDLEN, PROC_ENVPROCID,
1122 nproc_id);
1123 if (status == -1) {
1124 dev_dbg(bridge, "%s: Proc ID string overflow\n",
1125 __func__);
1126 status = -EPERM;
1127 } else {
1128 new_envp =
1129 prepend_envp(new_envp, (char **)user_envp,
1130 envp_elems, cnew_envp, sz_proc_id);
1131 /* Get the DCD Handle */
1132 status = mgr_get_dcd_handle(p_proc_object->hmgr_obj,
1133 (u32 *) &hdcd_handle);
1134 if (DSP_SUCCEEDED(status)) {
1135 /* Before proceeding with new load,
1136 * check if a previously registered COFF
1137 * exists.
1138 * If yes, unregister nodes in previously
1139 * registered COFF. If any error occurred,
1140 * set previously registered COFF to NULL. */
1141 if (p_proc_object->psz_last_coff != NULL) {
1142 status =
1143 dcd_auto_unregister(hdcd_handle,
1144 p_proc_object->
1145 psz_last_coff);
1146 /* Regardless of auto unregister status,
1147 * free previously allocated
1148 * memory. */
1149 kfree(p_proc_object->psz_last_coff);
1150 p_proc_object->psz_last_coff = NULL;
1151 }
1152 }
1153 /* On success, do cod_open_base() */
1154 status = cod_open_base(cod_mgr, (char *)user_args[0],
1155 COD_SYMB);
1156 }
1157 } else {
1158 status = -ENOMEM;
1159 }
1160 if (DSP_SUCCEEDED(status)) {
1161 /* Auto-register data base */
1162 /* Get the DCD Handle */
1163 status = mgr_get_dcd_handle(p_proc_object->hmgr_obj,
1164 (u32 *) &hdcd_handle);
1165 if (DSP_SUCCEEDED(status)) {
1166 /* Auto register nodes in specified COFF
1167 * file. If registration did not fail,
1168 * (status = 0 or -EACCES)
1169 * save the name of the COFF file for
1170 * de-registration in the future. */
1171 status =
1172 dcd_auto_register(hdcd_handle,
1173 (char *)user_args[0]);
1174 if (status == -EACCES)
1175 status = 0;
1176
1177 if (DSP_FAILED(status)) {
1178 status = -EPERM;
1179 } else {
1180 DBC_ASSERT(p_proc_object->psz_last_coff ==
1181 NULL);
1182 /* Allocate memory for pszLastCoff */
1183 p_proc_object->psz_last_coff =
1184 kzalloc((strlen(user_args[0]) +
1185 1), GFP_KERNEL);
1186 /* If memory allocated, save COFF file name */
1187 if (p_proc_object->psz_last_coff) {
1188 strncpy(p_proc_object->psz_last_coff,
1189 (char *)user_args[0],
1190 (strlen((char *)user_args[0]) +
1191 1));
1192 }
1193 }
1194 }
1195 }
1196 /* Update shared memory address and size */
1197 if (DSP_SUCCEEDED(status)) {
1198 /* Create the message manager. This must be done
1199 * before calling the IOOnLoaded function. */
1200 dev_get_msg_mgr(p_proc_object->hdev_obj, &hmsg_mgr);
1201 if (!hmsg_mgr) {
1202 status = msg_create(&hmsg_mgr, p_proc_object->hdev_obj,
1203 (msg_onexit) node_on_exit);
1204 DBC_ASSERT(DSP_SUCCEEDED(status));
1205 dev_set_msg_mgr(p_proc_object->hdev_obj, hmsg_mgr);
1206 }
1207 }
1208 if (DSP_SUCCEEDED(status)) {
1209 /* Set the Device object's message manager */
1210 status = dev_get_io_mgr(p_proc_object->hdev_obj, &hio_mgr);
1211 if (hio_mgr)
1212 status = (*p_proc_object->intf_fxns->pfn_io_on_loaded)
1213 (hio_mgr);
1214 else
1215 status = -EFAULT;
1216 }
1217 if (DSP_SUCCEEDED(status)) {
1218 /* Now, attempt to load an exec: */
1219
1220 /* Boost the OPP level to Maximum level supported by baseport */
1221 #if defined(CONFIG_TIDSPBRIDGE_DVFS) && !defined(CONFIG_CPU_FREQ)
1222 if (pdata->cpu_set_freq)
1223 (*pdata->cpu_set_freq) (pdata->mpu_speed[VDD1_OPP5]);
1224 #endif
1225 status = cod_load_base(cod_mgr, argc_index, (char **)user_args,
1226 dev_brd_write_fxn,
1227 p_proc_object->hdev_obj, NULL);
1228 if (DSP_FAILED(status)) {
1229 if (status == -EBADF) {
1230 dev_dbg(bridge, "%s: Failure to Load the EXE\n",
1231 __func__);
1232 }
1233 if (status == -ESPIPE) {
1234 pr_err("%s: Couldn't parse the file\n",
1235 __func__);
1236 }
1237 }
1238 /* Requesting the lowest opp supported */
1239 #if defined(CONFIG_TIDSPBRIDGE_DVFS) && !defined(CONFIG_CPU_FREQ)
1240 if (pdata->cpu_set_freq)
1241 (*pdata->cpu_set_freq) (pdata->mpu_speed[VDD1_OPP1]);
1242 #endif
1243
1244 }
1245 if (DSP_SUCCEEDED(status)) {
1246 /* Update the Processor status to loaded */
1247 status = (*p_proc_object->intf_fxns->pfn_brd_set_state)
1248 (p_proc_object->hbridge_context, BRD_LOADED);
1249 if (DSP_SUCCEEDED(status)) {
1250 p_proc_object->proc_state = PROC_LOADED;
1251 if (p_proc_object->ntfy_obj)
1252 proc_notify_clients(p_proc_object,
1253 DSP_PROCESSORSTATECHANGE);
1254 }
1255 }
1256 if (DSP_SUCCEEDED(status)) {
1257 status = proc_get_processor_id(hprocessor, &proc_id);
1258 if (proc_id == DSP_UNIT) {
1259 /* Use all available DSP address space after EXTMEM
1260 * for DMM */
1261 if (DSP_SUCCEEDED(status))
1262 status = cod_get_sym_value(cod_mgr, EXTEND,
1263 &dw_ext_end);
1264
1265 /* Reset DMM structs and add an initial free chunk */
1266 if (DSP_SUCCEEDED(status)) {
1267 status =
1268 dev_get_dmm_mgr(p_proc_object->hdev_obj,
1269 &dmm_mgr);
1270 if (dmm_mgr) {
1271 /* Set dw_ext_end to DMM START u8
1272 * address */
1273 dw_ext_end =
1274 (dw_ext_end + 1) * DSPWORDSIZE;
1275 /* DMM memory is from EXT_END */
1276 status = dmm_create_tables(dmm_mgr,
1277 dw_ext_end,
1278 DMMPOOLSIZE);
1279 } else {
1280 status = -EFAULT;
1281 }
1282 }
1283 }
1284 }
1285 /* Restore the original argv[0] */
1286 kfree(new_envp);
1287 user_args[0] = pargv0;
1288 if (DSP_SUCCEEDED(status)) {
1289 if (DSP_SUCCEEDED((*p_proc_object->intf_fxns->pfn_brd_status)
1290 (p_proc_object->hbridge_context, &brd_state))) {
1291 pr_info("%s: Processor Loaded %s\n", __func__, pargv0);
1292 kfree(drv_datap->base_img);
1293 drv_datap->base_img = kmalloc(strlen(pargv0) + 1,
1294 GFP_KERNEL);
1295 if (drv_datap->base_img)
1296 strncpy(drv_datap->base_img, pargv0,
1297 strlen(pargv0) + 1);
1298 else
1299 status = -ENOMEM;
1300 DBC_ASSERT(brd_state == BRD_LOADED);
1301 }
1302 }
1303
1304 func_end:
1305 if (DSP_FAILED(status))
1306 pr_err("%s: Processor failed to load\n", __func__);
1307
1308 DBC_ENSURE((DSP_SUCCEEDED(status)
1309 && p_proc_object->proc_state == PROC_LOADED)
1310 || DSP_FAILED(status));
1311 #ifdef OPT_LOAD_TIME_INSTRUMENTATION
1312 do_gettimeofday(&tv2);
1313 if (tv2.tv_usec < tv1.tv_usec) {
1314 tv2.tv_usec += 1000000;
1315 tv2.tv_sec--;
1316 }
1317 dev_dbg(bridge, "%s: time to load %d sec and %d usec\n", __func__,
1318 tv2.tv_sec - tv1.tv_sec, tv2.tv_usec - tv1.tv_usec);
1319 #endif
1320 return status;
1321 }
1322
1323 /*
1324 * ======== proc_map ========
1325 * Purpose:
1326 * Maps a MPU buffer to DSP address space.
1327 */
1328 int proc_map(void *hprocessor, void *pmpu_addr, u32 ul_size,
1329 void *req_addr, void **pp_map_addr, u32 ul_map_attr,
1330 struct process_context *pr_ctxt)
1331 {
1332 u32 va_align;
1333 u32 pa_align;
1334 struct dmm_object *dmm_mgr;
1335 u32 size_align;
1336 int status = 0;
1337 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
1338 struct dmm_map_object *map_obj;
1339 u32 tmp_addr = 0;
1340
1341 #ifdef CONFIG_TIDSPBRIDGE_CACHE_LINE_CHECK
1342 if ((ul_map_attr & BUFMODE_MASK) != RBUF) {
1343 if (!IS_ALIGNED((u32)pmpu_addr, DSP_CACHE_LINE) ||
1344 !IS_ALIGNED(ul_size, DSP_CACHE_LINE)) {
1345 pr_err("%s: not aligned: 0x%x (%d)\n", __func__,
1346 (u32)pmpu_addr, ul_size);
1347 return -EFAULT;
1348 }
1349 }
1350 #endif
1351
1352 /* Calculate the page-aligned PA, VA and size */
1353 va_align = PG_ALIGN_LOW((u32) req_addr, PG_SIZE4K);
1354 pa_align = PG_ALIGN_LOW((u32) pmpu_addr, PG_SIZE4K);
1355 size_align = PG_ALIGN_HIGH(ul_size + (u32) pmpu_addr - pa_align,
1356 PG_SIZE4K);
1357
1358 if (!p_proc_object) {
1359 status = -EFAULT;
1360 goto func_end;
1361 }
1362 /* Critical section */
1363 mutex_lock(&proc_lock);
1364 dmm_get_handle(p_proc_object, &dmm_mgr);
1365 if (dmm_mgr)
1366 status = dmm_map_memory(dmm_mgr, va_align, size_align);
1367 else
1368 status = -EFAULT;
1369
1370 /* Add mapping to the page tables. */
1371 if (DSP_SUCCEEDED(status)) {
1372
1373 /* Mapped address = MSB of VA | LSB of PA */
1374 tmp_addr = (va_align | ((u32) pmpu_addr & (PG_SIZE4K - 1)));
1375 /* mapped memory resource tracking */
1376 map_obj = add_mapping_info(pr_ctxt, pa_align, tmp_addr,
1377 size_align);
1378 if (!map_obj)
1379 status = -ENOMEM;
1380 else
1381 status = (*p_proc_object->intf_fxns->pfn_brd_mem_map)
1382 (p_proc_object->hbridge_context, pa_align, va_align,
1383 size_align, ul_map_attr, map_obj->pages);
1384 }
1385 if (DSP_SUCCEEDED(status)) {
1386 /* Mapped address = MSB of VA | LSB of PA */
1387 *pp_map_addr = (void *) tmp_addr;
1388 } else {
1389 remove_mapping_information(pr_ctxt, tmp_addr, size_align);
1390 dmm_un_map_memory(dmm_mgr, va_align, &size_align);
1391 }
1392 mutex_unlock(&proc_lock);
1393
1394 if (DSP_FAILED(status))
1395 goto func_end;
1396
1397 func_end:
1398 dev_dbg(bridge, "%s: hprocessor %p, pmpu_addr %p, ul_size %x, "
1399 "req_addr %p, ul_map_attr %x, pp_map_addr %p, va_align %x, "
1400 "pa_align %x, size_align %x status 0x%x\n", __func__,
1401 hprocessor, pmpu_addr, ul_size, req_addr, ul_map_attr,
1402 pp_map_addr, va_align, pa_align, size_align, status);
1403
1404 return status;
1405 }
1406
1407 /*
1408 * ======== proc_register_notify ========
1409 * Purpose:
1410 * Register to be notified of specific processor events.
1411 */
1412 int proc_register_notify(void *hprocessor, u32 event_mask,
1413 u32 notify_type, struct dsp_notification
1414 * hnotification)
1415 {
1416 int status = 0;
1417 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
1418 struct deh_mgr *hdeh_mgr;
1419
1420 DBC_REQUIRE(hnotification != NULL);
1421 DBC_REQUIRE(refs > 0);
1422
1423 /* Check processor handle */
1424 if (!p_proc_object) {
1425 status = -EFAULT;
1426 goto func_end;
1427 }
1428 /* Check if event mask is a valid processor related event */
1429 if (event_mask & ~(DSP_PROCESSORSTATECHANGE | DSP_PROCESSORATTACH |
1430 DSP_PROCESSORDETACH | DSP_PROCESSORRESTART |
1431 DSP_MMUFAULT | DSP_SYSERROR | DSP_PWRERROR |
1432 DSP_WDTOVERFLOW))
1433 status = -EINVAL;
1434
1435 /* Check if notify type is valid */
1436 if (notify_type != DSP_SIGNALEVENT)
1437 status = -EINVAL;
1438
1439 if (DSP_SUCCEEDED(status)) {
1440 /* If event mask is not DSP_SYSERROR, DSP_MMUFAULT,
1441 * or DSP_PWRERROR then register event immediately. */
1442 if (event_mask &
1443 ~(DSP_SYSERROR | DSP_MMUFAULT | DSP_PWRERROR |
1444 DSP_WDTOVERFLOW)) {
1445 status = ntfy_register(p_proc_object->ntfy_obj,
1446 hnotification, event_mask,
1447 notify_type);
1448 /* Special case alert, special case alert!
1449 * If we're trying to *deregister* (i.e. event_mask
1450 * is 0), a DSP_SYSERROR or DSP_MMUFAULT notification,
1451 * we have to deregister with the DEH manager.
1452 * There's no way to know, based on event_mask which
1453 * manager the notification event was registered with,
1454 * so if we're trying to deregister and ntfy_register
1455 * failed, we'll give the deh manager a shot.
1456 */
1457 if ((event_mask == 0) && DSP_FAILED(status)) {
1458 status =
1459 dev_get_deh_mgr(p_proc_object->hdev_obj,
1460 &hdeh_mgr);
1461 status =
1462 bridge_deh_register_notify(hdeh_mgr,
1463 event_mask,
1464 notify_type,
1465 hnotification);
1466 }
1467 } else {
1468 status = dev_get_deh_mgr(p_proc_object->hdev_obj,
1469 &hdeh_mgr);
1470 status =
1471 bridge_deh_register_notify(hdeh_mgr,
1472 event_mask,
1473 notify_type,
1474 hnotification);
1475
1476 }
1477 }
1478 func_end:
1479 return status;
1480 }
1481
1482 /*
1483 * ======== proc_reserve_memory ========
1484 * Purpose:
1485 * Reserve a virtually contiguous region of DSP address space.
1486 */
1487 int proc_reserve_memory(void *hprocessor, u32 ul_size,
1488 void **pp_rsv_addr,
1489 struct process_context *pr_ctxt)
1490 {
1491 struct dmm_object *dmm_mgr;
1492 int status = 0;
1493 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
1494 struct dmm_rsv_object *rsv_obj;
1495
1496 if (!p_proc_object) {
1497 status = -EFAULT;
1498 goto func_end;
1499 }
1500
1501 status = dmm_get_handle(p_proc_object, &dmm_mgr);
1502 if (!dmm_mgr) {
1503 status = -EFAULT;
1504 goto func_end;
1505 }
1506
1507 status = dmm_reserve_memory(dmm_mgr, ul_size, (u32 *) pp_rsv_addr);
1508 if (status != 0)
1509 goto func_end;
1510
1511 /*
1512 * A successful reserve should be followed by insertion of rsv_obj
1513 * into dmm_rsv_list, so that reserved memory resource tracking
1514 * remains uptodate
1515 */
1516 rsv_obj = kmalloc(sizeof(struct dmm_rsv_object), GFP_KERNEL);
1517 if (rsv_obj) {
1518 rsv_obj->dsp_reserved_addr = (u32) *pp_rsv_addr;
1519 spin_lock(&pr_ctxt->dmm_rsv_lock);
1520 list_add(&rsv_obj->link, &pr_ctxt->dmm_rsv_list);
1521 spin_unlock(&pr_ctxt->dmm_rsv_lock);
1522 }
1523
1524 func_end:
1525 dev_dbg(bridge, "%s: hprocessor: 0x%p ul_size: 0x%x pp_rsv_addr: 0x%p "
1526 "status 0x%x\n", __func__, hprocessor,
1527 ul_size, pp_rsv_addr, status);
1528 return status;
1529 }
1530
1531 /*
1532 * ======== proc_start ========
1533 * Purpose:
1534 * Start a processor running.
1535 */
1536 int proc_start(void *hprocessor)
1537 {
1538 int status = 0;
1539 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
1540 struct cod_manager *cod_mgr; /* Code manager handle */
1541 u32 dw_dsp_addr; /* Loaded code's entry point. */
1542 int brd_state;
1543
1544 DBC_REQUIRE(refs > 0);
1545 if (!p_proc_object) {
1546 status = -EFAULT;
1547 goto func_end;
1548 }
1549 /* Call the bridge_brd_start */
1550 if (p_proc_object->proc_state != PROC_LOADED) {
1551 status = -EBADR;
1552 goto func_end;
1553 }
1554 status = dev_get_cod_mgr(p_proc_object->hdev_obj, &cod_mgr);
1555 if (!cod_mgr) {
1556 status = -EFAULT;
1557 goto func_cont;
1558 }
1559
1560 status = cod_get_entry(cod_mgr, &dw_dsp_addr);
1561 if (DSP_FAILED(status))
1562 goto func_cont;
1563
1564 status = (*p_proc_object->intf_fxns->pfn_brd_start)
1565 (p_proc_object->hbridge_context, dw_dsp_addr);
1566 if (DSP_FAILED(status))
1567 goto func_cont;
1568
1569 /* Call dev_create2 */
1570 status = dev_create2(p_proc_object->hdev_obj);
1571 if (DSP_SUCCEEDED(status)) {
1572 p_proc_object->proc_state = PROC_RUNNING;
1573 /* Deep sleep switces off the peripheral clocks.
1574 * we just put the DSP CPU in idle in the idle loop.
1575 * so there is no need to send a command to DSP */
1576
1577 if (p_proc_object->ntfy_obj) {
1578 proc_notify_clients(p_proc_object,
1579 DSP_PROCESSORSTATECHANGE);
1580 }
1581 } else {
1582 /* Failed to Create Node Manager and DISP Object
1583 * Stop the Processor from running. Put it in STOPPED State */
1584 (void)(*p_proc_object->intf_fxns->
1585 pfn_brd_stop) (p_proc_object->hbridge_context);
1586 p_proc_object->proc_state = PROC_STOPPED;
1587 }
1588 func_cont:
1589 if (DSP_SUCCEEDED(status)) {
1590 if (DSP_SUCCEEDED((*p_proc_object->intf_fxns->pfn_brd_status)
1591 (p_proc_object->hbridge_context, &brd_state))) {
1592 pr_info("%s: dsp in running state\n", __func__);
1593 DBC_ASSERT(brd_state != BRD_HIBERNATION);
1594 }
1595 } else {
1596 pr_err("%s: Failed to start the dsp\n", __func__);
1597 }
1598
1599 func_end:
1600 DBC_ENSURE((DSP_SUCCEEDED(status) && p_proc_object->proc_state ==
1601 PROC_RUNNING) || DSP_FAILED(status));
1602 return status;
1603 }
1604
1605 /*
1606 * ======== proc_stop ========
1607 * Purpose:
1608 * Stop a processor running.
1609 */
1610 int proc_stop(void *hprocessor)
1611 {
1612 int status = 0;
1613 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
1614 struct msg_mgr *hmsg_mgr;
1615 struct node_mgr *hnode_mgr;
1616 void *hnode;
1617 u32 node_tab_size = 1;
1618 u32 num_nodes = 0;
1619 u32 nodes_allocated = 0;
1620 int brd_state;
1621
1622 DBC_REQUIRE(refs > 0);
1623 if (!p_proc_object) {
1624 status = -EFAULT;
1625 goto func_end;
1626 }
1627 /* check if there are any running nodes */
1628 status = dev_get_node_manager(p_proc_object->hdev_obj, &hnode_mgr);
1629 if (DSP_SUCCEEDED(status) && hnode_mgr) {
1630 status = node_enum_nodes(hnode_mgr, &hnode, node_tab_size,
1631 &num_nodes, &nodes_allocated);
1632 if ((status == -EINVAL) || (nodes_allocated > 0)) {
1633 pr_err("%s: Can't stop device, active nodes = %d \n",
1634 __func__, nodes_allocated);
1635 return -EBADR;
1636 }
1637 }
1638 /* Call the bridge_brd_stop */
1639 /* It is OK to stop a device that does n't have nodes OR not started */
1640 status =
1641 (*p_proc_object->intf_fxns->
1642 pfn_brd_stop) (p_proc_object->hbridge_context);
1643 if (DSP_SUCCEEDED(status)) {
1644 dev_dbg(bridge, "%s: processor in standby mode\n", __func__);
1645 p_proc_object->proc_state = PROC_STOPPED;
1646 /* Destory the Node Manager, msg_ctrl Manager */
1647 if (DSP_SUCCEEDED(dev_destroy2(p_proc_object->hdev_obj))) {
1648 /* Destroy the msg_ctrl by calling msg_delete */
1649 dev_get_msg_mgr(p_proc_object->hdev_obj, &hmsg_mgr);
1650 if (hmsg_mgr) {
1651 msg_delete(hmsg_mgr);
1652 dev_set_msg_mgr(p_proc_object->hdev_obj, NULL);
1653 }
1654 if (DSP_SUCCEEDED
1655 ((*p_proc_object->
1656 intf_fxns->pfn_brd_status) (p_proc_object->
1657 hbridge_context,
1658 &brd_state)))
1659 DBC_ASSERT(brd_state == BRD_STOPPED);
1660 }
1661 } else {
1662 pr_err("%s: Failed to stop the processor\n", __func__);
1663 }
1664 func_end:
1665
1666 return status;
1667 }
1668
1669 /*
1670 * ======== proc_un_map ========
1671 * Purpose:
1672 * Removes a MPU buffer mapping from the DSP address space.
1673 */
1674 int proc_un_map(void *hprocessor, void *map_addr,
1675 struct process_context *pr_ctxt)
1676 {
1677 int status = 0;
1678 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
1679 struct dmm_object *dmm_mgr;
1680 u32 va_align;
1681 u32 size_align;
1682
1683 va_align = PG_ALIGN_LOW((u32) map_addr, PG_SIZE4K);
1684 if (!p_proc_object) {
1685 status = -EFAULT;
1686 goto func_end;
1687 }
1688
1689 status = dmm_get_handle(hprocessor, &dmm_mgr);
1690 if (!dmm_mgr) {
1691 status = -EFAULT;
1692 goto func_end;
1693 }
1694
1695 /* Critical section */
1696 mutex_lock(&proc_lock);
1697 /*
1698 * Update DMM structures. Get the size to unmap.
1699 * This function returns error if the VA is not mapped
1700 */
1701 status = dmm_un_map_memory(dmm_mgr, (u32) va_align, &size_align);
1702 /* Remove mapping from the page tables. */
1703 if (DSP_SUCCEEDED(status)) {
1704 status = (*p_proc_object->intf_fxns->pfn_brd_mem_un_map)
1705 (p_proc_object->hbridge_context, va_align, size_align);
1706 }
1707
1708 mutex_unlock(&proc_lock);
1709 if (DSP_FAILED(status))
1710 goto func_end;
1711
1712 /*
1713 * A successful unmap should be followed by removal of map_obj
1714 * from dmm_map_list, so that mapped memory resource tracking
1715 * remains uptodate
1716 */
1717 remove_mapping_information(pr_ctxt, (u32) map_addr, size_align);
1718
1719 func_end:
1720 dev_dbg(bridge, "%s: hprocessor: 0x%p map_addr: 0x%p status: 0x%x\n",
1721 __func__, hprocessor, map_addr, status);
1722 return status;
1723 }
1724
1725 /*
1726 * ======== proc_un_reserve_memory ========
1727 * Purpose:
1728 * Frees a previously reserved region of DSP address space.
1729 */
1730 int proc_un_reserve_memory(void *hprocessor, void *prsv_addr,
1731 struct process_context *pr_ctxt)
1732 {
1733 struct dmm_object *dmm_mgr;
1734 int status = 0;
1735 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
1736 struct dmm_rsv_object *rsv_obj;
1737
1738 if (!p_proc_object) {
1739 status = -EFAULT;
1740 goto func_end;
1741 }
1742
1743 status = dmm_get_handle(p_proc_object, &dmm_mgr);
1744 if (!dmm_mgr) {
1745 status = -EFAULT;
1746 goto func_end;
1747 }
1748
1749 status = dmm_un_reserve_memory(dmm_mgr, (u32) prsv_addr);
1750 if (status != 0)
1751 goto func_end;
1752
1753 /*
1754 * A successful unreserve should be followed by removal of rsv_obj
1755 * from dmm_rsv_list, so that reserved memory resource tracking
1756 * remains uptodate
1757 */
1758 spin_lock(&pr_ctxt->dmm_rsv_lock);
1759 list_for_each_entry(rsv_obj, &pr_ctxt->dmm_rsv_list, link) {
1760 if (rsv_obj->dsp_reserved_addr == (u32) prsv_addr) {
1761 list_del(&rsv_obj->link);
1762 kfree(rsv_obj);
1763 break;
1764 }
1765 }
1766 spin_unlock(&pr_ctxt->dmm_rsv_lock);
1767
1768 func_end:
1769 dev_dbg(bridge, "%s: hprocessor: 0x%p prsv_addr: 0x%p status: 0x%x\n",
1770 __func__, hprocessor, prsv_addr, status);
1771 return status;
1772 }
1773
1774 /*
1775 * ======== = proc_monitor ======== ==
1776 * Purpose:
1777 * Place the Processor in Monitor State. This is an internal
1778 * function and a requirement before Processor is loaded.
1779 * This does a bridge_brd_stop, dev_destroy2 and bridge_brd_monitor.
1780 * In dev_destroy2 we delete the node manager.
1781 * Parameters:
1782 * p_proc_object: Pointer to Processor Object
1783 * Returns:
1784 * 0: Processor placed in monitor mode.
1785 * !0: Failed to place processor in monitor mode.
1786 * Requires:
1787 * Valid Processor Handle
1788 * Ensures:
1789 * Success: ProcObject state is PROC_IDLE
1790 */
1791 static int proc_monitor(struct proc_object *proc_obj)
1792 {
1793 int status = -EPERM;
1794 struct msg_mgr *hmsg_mgr;
1795 int brd_state;
1796
1797 DBC_REQUIRE(refs > 0);
1798 DBC_REQUIRE(proc_obj);
1799
1800 /* This is needed only when Device is loaded when it is
1801 * already 'ACTIVE' */
1802 /* Destory the Node Manager, msg_ctrl Manager */
1803 if (DSP_SUCCEEDED(dev_destroy2(proc_obj->hdev_obj))) {
1804 /* Destroy the msg_ctrl by calling msg_delete */
1805 dev_get_msg_mgr(proc_obj->hdev_obj, &hmsg_mgr);
1806 if (hmsg_mgr) {
1807 msg_delete(hmsg_mgr);
1808 dev_set_msg_mgr(proc_obj->hdev_obj, NULL);
1809 }
1810 }
1811 /* Place the Board in the Monitor State */
1812 if (DSP_SUCCEEDED((*proc_obj->intf_fxns->pfn_brd_monitor)
1813 (proc_obj->hbridge_context))) {
1814 status = 0;
1815 if (DSP_SUCCEEDED((*proc_obj->intf_fxns->pfn_brd_status)
1816 (proc_obj->hbridge_context, &brd_state)))
1817 DBC_ASSERT(brd_state == BRD_IDLE);
1818 }
1819
1820 DBC_ENSURE((DSP_SUCCEEDED(status) && brd_state == BRD_IDLE) ||
1821 DSP_FAILED(status));
1822 return status;
1823 }
1824
1825 /*
1826 * ======== get_envp_count ========
1827 * Purpose:
1828 * Return the number of elements in the envp array, including the
1829 * terminating NULL element.
1830 */
1831 static s32 get_envp_count(char **envp)
1832 {
1833 s32 ret = 0;
1834 if (envp) {
1835 while (*envp++)
1836 ret++;
1837
1838 ret += 1; /* Include the terminating NULL in the count. */
1839 }
1840
1841 return ret;
1842 }
1843
1844 /*
1845 * ======== prepend_envp ========
1846 * Purpose:
1847 * Prepend an environment variable=value pair to the new envp array, and
1848 * copy in the existing var=value pairs in the old envp array.
1849 */
1850 static char **prepend_envp(char **new_envp, char **envp, s32 envp_elems,
1851 s32 cnew_envp, char *sz_var)
1852 {
1853 char **pp_envp = new_envp;
1854
1855 DBC_REQUIRE(new_envp);
1856
1857 /* Prepend new environ var=value string */
1858 *new_envp++ = sz_var;
1859
1860 /* Copy user's environment into our own. */
1861 while (envp_elems--)
1862 *new_envp++ = *envp++;
1863
1864 /* Ensure NULL terminates the new environment strings array. */
1865 if (envp_elems == 0)
1866 *new_envp = NULL;
1867
1868 return pp_envp;
1869 }
1870
1871 /*
1872 * ======== proc_notify_clients ========
1873 * Purpose:
1874 * Notify the processor the events.
1875 */
1876 int proc_notify_clients(void *proc, u32 events)
1877 {
1878 int status = 0;
1879 struct proc_object *p_proc_object = (struct proc_object *)proc;
1880
1881 DBC_REQUIRE(p_proc_object);
1882 DBC_REQUIRE(IS_VALID_PROC_EVENT(events));
1883 DBC_REQUIRE(refs > 0);
1884 if (!p_proc_object) {
1885 status = -EFAULT;
1886 goto func_end;
1887 }
1888
1889 ntfy_notify(p_proc_object->ntfy_obj, events);
1890 func_end:
1891 return status;
1892 }
1893
1894 /*
1895 * ======== proc_notify_all_clients ========
1896 * Purpose:
1897 * Notify the processor the events. This includes notifying all clients
1898 * attached to a particulat DSP.
1899 */
1900 int proc_notify_all_clients(void *proc, u32 events)
1901 {
1902 int status = 0;
1903 struct proc_object *p_proc_object = (struct proc_object *)proc;
1904
1905 DBC_REQUIRE(IS_VALID_PROC_EVENT(events));
1906 DBC_REQUIRE(refs > 0);
1907
1908 if (!p_proc_object) {
1909 status = -EFAULT;
1910 goto func_end;
1911 }
1912
1913 dev_notify_clients(p_proc_object->hdev_obj, events);
1914
1915 func_end:
1916 return status;
1917 }
1918
1919 /*
1920 * ======== proc_get_processor_id ========
1921 * Purpose:
1922 * Retrieves the processor ID.
1923 */
1924 int proc_get_processor_id(void *proc, u32 * proc_id)
1925 {
1926 int status = 0;
1927 struct proc_object *p_proc_object = (struct proc_object *)proc;
1928
1929 if (p_proc_object)
1930 *proc_id = p_proc_object->processor_id;
1931 else
1932 status = -EFAULT;
1933
1934 return status;
1935 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree