aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/bus/fsl-mc/dprc.c
blob: 0fe3f52ae0de8fe3dc6799d51d8ce598ab9b740a (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
/*
 * Copyright 2013-2016 Freescale Semiconductor Inc.
 *
 */
#include <linux/kernel.h>
#include <linux/fsl/mc.h>

#include "fsl-mc-private.h"

/**
 * dprc_open() - Open DPRC object for use
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @container_id: Container ID to open
 * @token:	Returned token of DPRC object
 *
 * Return:	'0' on Success; Error code otherwise.
 *
 * @warning	Required before any operation on the object.
 */
int dprc_open(struct fsl_mc_io *mc_io,
	      u32 cmd_flags,
	      int container_id,
	      u16 *token)
{
	struct fsl_mc_command cmd = { 0 };
	struct dprc_cmd_open *cmd_params;
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_OPEN, cmd_flags,
					  0);
	cmd_params = (struct dprc_cmd_open *)cmd.params;
	cmd_params->container_id = cpu_to_le32(container_id);

	/* send command to mc*/
	err = mc_send_command(mc_io, &cmd);
	if (err)
		return err;

	/* retrieve response parameters */
	*token = mc_cmd_hdr_read_token(&cmd);

	return 0;
}
EXPORT_SYMBOL_GPL(dprc_open);

/**
 * dprc_close() - Close the control session of the object
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 *
 * After this function is called, no further operations are
 * allowed on the object without opening a new control session.
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_close(struct fsl_mc_io *mc_io,
	       u32 cmd_flags,
	       u16 token)
{
	struct fsl_mc_command cmd = { 0 };

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_CLOSE, cmd_flags,
					  token);

	/* send command to mc*/
	return mc_send_command(mc_io, &cmd);
}
EXPORT_SYMBOL_GPL(dprc_close);

/**
 * dprc_set_irq() - Set IRQ information for the DPRC to trigger an interrupt.
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @irq_index:	Identifies the interrupt index to configure
 * @irq_cfg:	IRQ configuration
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_set_irq(struct fsl_mc_io *mc_io,
		 u32 cmd_flags,
		 u16 token,
		 u8 irq_index,
		 struct dprc_irq_cfg *irq_cfg)
{
	struct fsl_mc_command cmd = { 0 };
	struct dprc_cmd_set_irq *cmd_params;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_SET_IRQ,
					  cmd_flags,
					  token);
	cmd_params = (struct dprc_cmd_set_irq *)cmd.params;
	cmd_params->irq_val = cpu_to_le32(irq_cfg->val);
	cmd_params->irq_index = irq_index;
	cmd_params->irq_addr = cpu_to_le64(irq_cfg->paddr);
	cmd_params->irq_num = cpu_to_le32(irq_cfg->irq_num);

	/* send command to mc*/
	return mc_send_command(mc_io, &cmd);
}

/**
 * dprc_set_irq_enable() - Set overall interrupt state.
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @irq_index:	The interrupt index to configure
 * @en:		Interrupt state - enable = 1, disable = 0
 *
 * Allows GPP software to control when interrupts are generated.
 * Each interrupt can have up to 32 causes.  The enable/disable control's the
 * overall interrupt state. if the interrupt is disabled no causes will cause
 * an interrupt.
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_set_irq_enable(struct fsl_mc_io *mc_io,
			u32 cmd_flags,
			u16 token,
			u8 irq_index,
			u8 en)
{
	struct fsl_mc_command cmd = { 0 };
	struct dprc_cmd_set_irq_enable *cmd_params;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_SET_IRQ_ENABLE,
					  cmd_flags, token);
	cmd_params = (struct dprc_cmd_set_irq_enable *)cmd.params;
	cmd_params->enable = en & DPRC_ENABLE;
	cmd_params->irq_index = irq_index;

	/* send command to mc*/
	return mc_send_command(mc_io, &cmd);
}

/**
 * dprc_set_irq_mask() - Set interrupt mask.
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @irq_index:	The interrupt index to configure
 * @mask:	event mask to trigger interrupt;
 *			each bit:
 *				0 = ignore event
 *				1 = consider event for asserting irq
 *
 * Every interrupt can have up to 32 causes and the interrupt model supports
 * masking/unmasking each cause independently
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_set_irq_mask(struct fsl_mc_io *mc_io,
		      u32 cmd_flags,
		      u16 token,
		      u8 irq_index,
		      u32 mask)
{
	struct fsl_mc_command cmd = { 0 };
	struct dprc_cmd_set_irq_mask *cmd_params;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_SET_IRQ_MASK,
					  cmd_flags, token);
	cmd_params = (struct dprc_cmd_set_irq_mask *)cmd.params;
	cmd_params->mask = cpu_to_le32(mask);
	cmd_params->irq_index = irq_index;

	/* send command to mc*/
	return mc_send_command(mc_io, &cmd);
}

/**
 * dprc_get_irq_status() - Get the current status of any pending interrupts.
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @irq_index:	The interrupt index to configure
 * @status:	Returned interrupts status - one bit per cause:
 *			0 = no interrupt pending
 *			1 = interrupt pending
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_get_irq_status(struct fsl_mc_io *mc_io,
			u32 cmd_flags,
			u16 token,
			u8 irq_index,
			u32 *status)
{
	struct fsl_mc_command cmd = { 0 };
	struct dprc_cmd_get_irq_status *cmd_params;
	struct dprc_rsp_get_irq_status *rsp_params;
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_IRQ_STATUS,
					  cmd_flags, token);
	cmd_params = (struct dprc_cmd_get_irq_status *)cmd.params;
	cmd_params->status = cpu_to_le32(*status);
	cmd_params->irq_index = irq_index;

	/* send command to mc*/
	err = mc_send_command(mc_io, &cmd);
	if (err)
		return err;

	/* retrieve response parameters */
	rsp_params = (struct dprc_rsp_get_irq_status *)cmd.params;
	*status = le32_to_cpu(rsp_params->status);

	return 0;
}

/**
 * dprc_clear_irq_status() - Clear a pending interrupt's status
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @irq_index:	The interrupt index to configure
 * @status:	bits to clear (W1C) - one bit per cause:
 *					0 = don't change
 *					1 = clear status bit
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_clear_irq_status(struct fsl_mc_io *mc_io,
			  u32 cmd_flags,
			  u16 token,
			  u8 irq_index,
			  u32 status)
{
	struct fsl_mc_command cmd = { 0 };
	struct dprc_cmd_clear_irq_status *cmd_params;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_CLEAR_IRQ_STATUS,
					  cmd_flags, token);
	cmd_params = (struct dprc_cmd_clear_irq_status *)cmd.params;
	cmd_params->status = cpu_to_le32(status);
	cmd_params->irq_index = irq_index;

	/* send command to mc*/
	return mc_send_command(mc_io, &cmd);
}

/**
 * dprc_get_attributes() - Obtains container attributes
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @attributes	Returned container attributes
 *
 * Return:     '0' on Success; Error code otherwise.
 */
int dprc_get_attributes(struct fsl_mc_io *mc_io,
			u32 cmd_flags,
			u16 token,
			struct dprc_attributes *attr)
{
	struct fsl_mc_command cmd = { 0 };
	struct dprc_rsp_get_attributes *rsp_params;
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_ATTR,
					  cmd_flags,
					  token);

	/* send command to mc*/
	err = mc_send_command(mc_io, &cmd);
	if (err)
		return err;

	/* retrieve response parameters */
	rsp_params = (struct dprc_rsp_get_attributes *)cmd.params;
	attr->container_id = le32_to_cpu(rsp_params->container_id);
	attr->icid = le16_to_cpu(rsp_params->icid);
	attr->options = le32_to_cpu(rsp_params->options);
	attr->portal_id = le32_to_cpu(rsp_params->portal_id);

	return 0;
}

/**
 * dprc_get_obj_count() - Obtains the number of objects in the DPRC
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @obj_count:	Number of objects assigned to the DPRC
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_get_obj_count(struct fsl_mc_io *mc_io,
		       u32 cmd_flags,
		       u16 token,
		       int *obj_count)
{
	struct fsl_mc_command cmd = { 0 };
	struct dprc_rsp_get_obj_count *rsp_params;
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_OBJ_COUNT,
					  cmd_flags, token);

	/* send command to mc*/
	err = mc_send_command(mc_io, &cmd);
	if (err)
		return err;

	/* retrieve response parameters */
	rsp_params = (struct dprc_rsp_get_obj_count *)cmd.params;
	*obj_count = le32_to_cpu(rsp_params->obj_count);

	return 0;
}
EXPORT_SYMBOL_GPL(dprc_get_obj_count);

/**
 * dprc_get_obj() - Get general information on an object
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @obj_index:	Index of the object to be queried (< obj_count)
 * @obj_desc:	Returns the requested object descriptor
 *
 * The object descriptors are retrieved one by one by incrementing
 * obj_index up to (not including) the value of obj_count returned
 * from dprc_get_obj_count(). dprc_get_obj_count() must
 * be called prior to dprc_get_obj().
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_get_obj(struct fsl_mc_io *mc_io,
		 u32 cmd_flags,
		 u16 token,
		 int obj_index,
		 struct fsl_mc_obj_desc *obj_desc)
{
	struct fsl_mc_command cmd = { 0 };
	struct dprc_cmd_get_obj *cmd_params;
	struct dprc_rsp_get_obj *rsp_params;
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_OBJ,
					  cmd_flags,
					  token);
	cmd_params = (struct dprc_cmd_get_obj *)cmd.params;
	cmd_params->obj_index = cpu_to_le32(obj_index);

	/* send command to mc*/
	err = mc_send_command(mc_io, &cmd);
	if (err)
		return err;

	/* retrieve response parameters */
	rsp_params = (struct dprc_rsp_get_obj *)cmd.params;
	obj_desc->id = le32_to_cpu(rsp_params->id);
	obj_desc->vendor = le16_to_cpu(rsp_params->vendor);
	obj_desc->irq_count = rsp_params->irq_count;
	obj_desc->region_count = rsp_params->region_count;
	obj_desc->state = le32_to_cpu(rsp_params->state);
	obj_desc->ver_major = le16_to_cpu(rsp_params->version_major);
	obj_desc->ver_minor = le16_to_cpu(rsp_params->version_minor);
	obj_desc->flags = le16_to_cpu(rsp_params->flags);
	strncpy(obj_desc->type, rsp_params->type, 16);
	obj_desc->type[15] = '\0';
	strncpy(obj_desc->label, rsp_params->label, 16);
	obj_desc->label[15] = '\0';
	return 0;
}
EXPORT_SYMBOL_GPL(dprc_get_obj);

/**
 * dprc_set_obj_irq() - Set IRQ information for object to trigger an interrupt.
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @obj_type:	Type of the object to set its IRQ
 * @obj_id:	ID of the object to set its IRQ
 * @irq_index:	The interrupt index to configure
 * @irq_cfg:	IRQ configuration
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_set_obj_irq(struct fsl_mc_io *mc_io,
		     u32 cmd_flags,
		     u16 token,
		     char *obj_type,
		     int obj_id,
		     u8 irq_index,
		     struct dprc_irq_cfg *irq_cfg)
{
	struct fsl_mc_command cmd = { 0 };
	struct dprc_cmd_set_obj_irq *cmd_params;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_SET_OBJ_IRQ,
					  cmd_flags,
					  token);
	cmd_params = (struct dprc_cmd_set_obj_irq *)cmd.params;
	cmd_params->irq_val = cpu_to_le32(irq_cfg->val);
	cmd_params->irq_index = irq_index;
	cmd_params->irq_addr = cpu_to_le64(irq_cfg->paddr);
	cmd_params->irq_num = cpu_to_le32(irq_cfg->irq_num);
	cmd_params->obj_id = cpu_to_le32(obj_id);
	strncpy(cmd_params->obj_type, obj_type, 16);
	cmd_params->obj_type[15] = '\0';

	/* send command to mc*/
	return mc_send_command(mc_io, &cmd);
}
EXPORT_SYMBOL_GPL(dprc_set_obj_irq);

/**
 * dprc_get_obj_region() - Get region information for a specified object.
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @obj_type;	Object type as returned in dprc_get_obj()
 * @obj_id:	Unique object instance as returned in dprc_get_obj()
 * @region_index: The specific region to query
 * @region_desc:  Returns the requested region descriptor
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_get_obj_region(struct fsl_mc_io *mc_io,
			u32 cmd_flags,
			u16 token,
			char *obj_type,
			int obj_id,
			u8 region_index,
			struct dprc_region_desc *region_desc)
{
	struct fsl_mc_command cmd = { 0 };
	struct dprc_cmd_get_obj_region *cmd_params;
	struct dprc_rsp_get_obj_region *rsp_params;
	u16 major_ver, minor_ver;
	int err;

	/* prepare command */
	err = dprc_get_api_version(mc_io, 0,
				     &major_ver,
				     &minor_ver);
	if (err)
		return err;

	/**
	 * MC API version 6.3 introduced a new field to the region
	 * descriptor: base_address. If the older API is in use then the base
	 * address is set to zero to indicate it needs to be obtained elsewhere
	 * (typically the device tree).
	 */
	if (major_ver > 6 || (major_ver == 6 && minor_ver >= 3))
		cmd.header =
			mc_encode_cmd_header(DPRC_CMDID_GET_OBJ_REG_V2,
					     cmd_flags, token);
	else
		cmd.header =
			mc_encode_cmd_header(DPRC_CMDID_GET_OBJ_REG,
					     cmd_flags, token);

	cmd_params = (struct dprc_cmd_get_obj_region *)cmd.params;
	cmd_params->obj_id = cpu_to_le32(obj_id);
	cmd_params->region_index = region_index;
	strncpy(cmd_params->obj_type, obj_type, 16);
	cmd_params->obj_type[15] = '\0';

	/* send command to mc*/
	err = mc_send_command(mc_io, &cmd);
	if (err)
		return err;

	/* retrieve response parameters */
	rsp_params = (struct dprc_rsp_get_obj_region *)cmd.params;
	region_desc->base_offset = le64_to_cpu(rsp_params->base_offset);
	region_desc->size = le32_to_cpu(rsp_params->size);
	if (major_ver > 6 || (major_ver == 6 && minor_ver >= 3))
		region_desc->base_address = le64_to_cpu(rsp_params->base_addr);
	else
		region_desc->base_address = 0;

	return 0;
}
EXPORT_SYMBOL_GPL(dprc_get_obj_region);

/**
 * dprc_get_api_version - Get Data Path Resource Container API version
 * @mc_io:	Pointer to Mc portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @major_ver:	Major version of Data Path Resource Container API
 * @minor_ver:	Minor version of Data Path Resource Container API
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_get_api_version(struct fsl_mc_io *mc_io,
			 u32 cmd_flags,
			 u16 *major_ver,
			 u16 *minor_ver)
{
	struct fsl_mc_command cmd = { 0 };
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_API_VERSION,
					  cmd_flags, 0);

	/* send command to mc */
	err = mc_send_command(mc_io, &cmd);
	if (err)
		return err;

	/* retrieve response parameters */
	mc_cmd_read_api_version(&cmd, major_ver, minor_ver);

	return 0;
}

/**
 * dprc_get_container_id - Get container ID associated with a given portal.
 * @mc_io:		Pointer to Mc portal's I/O object
 * @cmd_flags:		Command flags; one or more of 'MC_CMD_FLAG_'
 * @container_id:	Requested container id
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_get_container_id(struct fsl_mc_io *mc_io,
			  u32 cmd_flags,
			  int *container_id)
{
	struct fsl_mc_command cmd = { 0 };
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_CONT_ID,
					  cmd_flags,
					  0);

	/* send command to mc*/
	err = mc_send_command(mc_io, &cmd);
	if (err)
		return err;

	/* retrieve response parameters */
	*container_id = (int)mc_cmd_read_object_id(&cmd);

	return 0;
}