summaryrefslogtreecommitdiff
path: root/sound/pci/asihpi/hpioctl.c
blob: b1a2a7ea4172331c07b50340c5d26ebe2f9e6bf0 (plain)
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
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
/*******************************************************************************
    AudioScience HPI driver
    Common Linux HPI ioctl and module probe/remove functions

    Copyright (C) 1997-2014  AudioScience Inc. <support@audioscience.com>

    This program is free software; you can redistribute it and/or modify
    it under the terms of version 2 of the GNU General Public License as
    published by the Free Software Foundation;

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

*******************************************************************************/
#define SOURCEFILE_NAME "hpioctl.c"

#include "hpi_internal.h"
#include "hpi_version.h"
#include "hpimsginit.h"
#include "hpidebug.h"
#include "hpimsgx.h"
#include "hpioctl.h"
#include "hpicmn.h"

#include <linux/fs.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/moduleparam.h>
#include <linux/uaccess.h>
#include <linux/pci.h>
#include <linux/stringify.h>
#include <linux/module.h>
#include <linux/vmalloc.h>
#include <linux/nospec.h>

#ifdef MODULE_FIRMWARE
MODULE_FIRMWARE("asihpi/dsp5000.bin");
MODULE_FIRMWARE("asihpi/dsp6200.bin");
MODULE_FIRMWARE("asihpi/dsp6205.bin");
MODULE_FIRMWARE("asihpi/dsp6400.bin");
MODULE_FIRMWARE("asihpi/dsp6600.bin");
MODULE_FIRMWARE("asihpi/dsp8700.bin");
MODULE_FIRMWARE("asihpi/dsp8900.bin");
#endif

static int prealloc_stream_buf;
module_param(prealloc_stream_buf, int, S_IRUGO);
MODULE_PARM_DESC(prealloc_stream_buf,
	"Preallocate size for per-adapter stream buffer");

/* Allow the debug level to be changed after module load.
 E.g.   echo 2 > /sys/module/asihpi/parameters/hpiDebugLevel
*/
module_param(hpi_debug_level, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(hpi_debug_level, "debug verbosity 0..5");

/* List of adapters found */
static struct hpi_adapter adapters[HPI_MAX_ADAPTERS];

/* Wrapper function to HPI_Message to enable dumping of the
   message and response types.
*/
static void hpi_send_recv_f(struct hpi_message *phm, struct hpi_response *phr,
	struct file *file)
{
	if ((phm->adapter_index >= HPI_MAX_ADAPTERS)
		&& (phm->object != HPI_OBJ_SUBSYSTEM))
		phr->error = HPI_ERROR_INVALID_OBJ_INDEX;
	else
		hpi_send_recv_ex(phm, phr, file);
}

/* This is called from hpifunc.c functions, called by ALSA
 * (or other kernel process) In this case there is no file descriptor
 * available for the message cache code
 */
void hpi_send_recv(struct hpi_message *phm, struct hpi_response *phr)
{
	hpi_send_recv_f(phm, phr, HOWNER_KERNEL);
}

EXPORT_SYMBOL(hpi_send_recv);
/* for radio-asihpi */

int asihpi_hpi_release(struct file *file)
{
	struct hpi_message hm;
	struct hpi_response hr;

/* HPI_DEBUG_LOG(INFO,"hpi_release file %p, pid %d\n", file, current->pid); */
	/* close the subsystem just in case the application forgot to. */
	hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
		HPI_SUBSYS_CLOSE);
	hpi_send_recv_ex(&hm, &hr, file);
	return 0;
}

long asihpi_hpi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
	struct hpi_ioctl_linux __user *phpi_ioctl_data;
	void __user *puhm;
	void __user *puhr;
	union hpi_message_buffer_v1 *hm;
	union hpi_response_buffer_v1 *hr;
	u16 msg_size;
	u16 res_max_size;
	u32 uncopied_bytes;
	int err = 0;

	if (cmd != HPI_IOCTL_LINUX)
		return -EINVAL;

	hm = kmalloc(sizeof(*hm), GFP_KERNEL);
	hr = kzalloc(sizeof(*hr), GFP_KERNEL);
	if (!hm || !hr) {
		err = -ENOMEM;
		goto out;
	}

	phpi_ioctl_data = (struct hpi_ioctl_linux __user *)arg;

	/* Read the message and response pointers from user space.  */
	if (get_user(puhm, &phpi_ioctl_data->phm)
		|| get_user(puhr, &phpi_ioctl_data->phr)) {
		err = -EFAULT;
		goto out;
	}

	/* Now read the message size and data from user space.  */
	if (get_user(msg_size, (u16 __user *)puhm)) {
		err = -EFAULT;
		goto out;
	}
	if (msg_size > sizeof(*hm))
		msg_size = sizeof(*hm);

	/* printk(KERN_INFO "message size %d\n", hm->h.wSize); */

	uncopied_bytes = copy_from_user(hm, puhm, msg_size);
	if (uncopied_bytes) {
		HPI_DEBUG_LOG(ERROR, "uncopied bytes %d\n", uncopied_bytes);
		err = -EFAULT;
		goto out;
	}

	/* Override h.size in case it is changed between two userspace fetches */
	hm->h.size = msg_size;

	if (get_user(res_max_size, (u16 __user *)puhr)) {
		err = -EFAULT;
		goto out;
	}
	/* printk(KERN_INFO "user response size %d\n", res_max_size); */
	if (res_max_size < sizeof(struct hpi_response_header)) {
		HPI_DEBUG_LOG(WARNING, "small res size %d\n", res_max_size);
		err = -EFAULT;
		goto out;
	}

	res_max_size = min_t(size_t, res_max_size, sizeof(*hr));

	switch (hm->h.function) {
	case HPI_SUBSYS_CREATE_ADAPTER:
	case HPI_ADAPTER_DELETE:
		/* Application must not use these functions! */
		hr->h.size = sizeof(hr->h);
		hr->h.error = HPI_ERROR_INVALID_OPERATION;
		hr->h.function = hm->h.function;
		uncopied_bytes = copy_to_user(puhr, hr, hr->h.size);
		if (uncopied_bytes)
			err = -EFAULT;
		else
			err = 0;
		goto out;
	}

	hr->h.size = res_max_size;
	if (hm->h.object == HPI_OBJ_SUBSYSTEM) {
		hpi_send_recv_f(&hm->m0, &hr->r0, file);
	} else {
		u16 __user *ptr = NULL;
		u32 size = 0;
		/* -1=no data 0=read from user mem, 1=write to user mem */
		int wrflag = -1;
		struct hpi_adapter *pa = NULL;

		if (hm->h.adapter_index < ARRAY_SIZE(adapters))
			pa = &adapters[array_index_nospec(hm->h.adapter_index,
							  ARRAY_SIZE(adapters))];

		if (!pa || !pa->adapter || !pa->adapter->type) {
			hpi_init_response(&hr->r0, hm->h.object,
				hm->h.function, HPI_ERROR_BAD_ADAPTER_NUMBER);

			uncopied_bytes =
				copy_to_user(puhr, hr, sizeof(hr->h));
			if (uncopied_bytes)
				err = -EFAULT;
			else
				err = 0;
			goto out;
		}

		if (mutex_lock_interruptible(&pa->mutex)) {
			err = -EINTR;
			goto out;
		}

		/* Dig out any pointers embedded in the message.  */
		switch (hm->h.function) {
		case HPI_OSTREAM_WRITE:
		case HPI_ISTREAM_READ:{
				/* Yes, sparse, this is correct. */
				ptr = (u16 __user *)hm->m0.u.d.u.data.pb_data;
				size = hm->m0.u.d.u.data.data_size;

				/* Allocate buffer according to application request.
				   ?Is it better to alloc/free for the duration
				   of the transaction?
				 */
				if (pa->buffer_size < size) {
					HPI_DEBUG_LOG(DEBUG,
						"Realloc adapter %d stream "
						"buffer from %zd to %d\n",
						hm->h.adapter_index,
						pa->buffer_size, size);
					if (pa->p_buffer) {
						pa->buffer_size = 0;
						vfree(pa->p_buffer);
					}
					pa->p_buffer = vmalloc(size);
					if (pa->p_buffer)
						pa->buffer_size = size;
					else {
						HPI_DEBUG_LOG(ERROR,
							"HPI could not allocate "
							"stream buffer size %d\n",
							size);

						mutex_unlock(&pa->mutex);
						err = -EINVAL;
						goto out;
					}
				}

				hm->m0.u.d.u.data.pb_data = pa->p_buffer;
				if (hm->h.function == HPI_ISTREAM_READ)
					/* from card, WRITE to user mem */
					wrflag = 1;
				else
					wrflag = 0;
				break;
			}

		default:
			size = 0;
			break;
		}

		if (size && (wrflag == 0)) {
			uncopied_bytes =
				copy_from_user(pa->p_buffer, ptr, size);
			if (uncopied_bytes)
				HPI_DEBUG_LOG(WARNING,
					"Missed %d of %d "
					"bytes from user\n", uncopied_bytes,
					size);
		}

		hpi_send_recv_f(&hm->m0, &hr->r0, file);

		if (size && (wrflag == 1)) {
			uncopied_bytes =
				copy_to_user(ptr, pa->p_buffer, size);
			if (uncopied_bytes)
				HPI_DEBUG_LOG(WARNING,
					"Missed %d of %d " "bytes to user\n",
					uncopied_bytes, size);
		}

		mutex_unlock(&pa->mutex);
	}

	/* on return response size must be set */
	/*printk(KERN_INFO "response size %d\n", hr->h.wSize); */

	if (!hr->h.size) {
		HPI_DEBUG_LOG(ERROR, "response zero size\n");
		err = -EFAULT;
		goto out;
	}

	if (hr->h.size > res_max_size) {
		HPI_DEBUG_LOG(ERROR, "response too big %d %d\n", hr->h.size,
			res_max_size);
		hr->h.error = HPI_ERROR_RESPONSE_BUFFER_TOO_SMALL;
		hr->h.specific_error = hr->h.size;
		hr->h.size = sizeof(hr->h);
	}

	uncopied_bytes = copy_to_user(puhr, hr, hr->h.size);
	if (uncopied_bytes) {
		HPI_DEBUG_LOG(ERROR, "uncopied bytes %d\n", uncopied_bytes);
		err = -EFAULT;
		goto out;
	}

out:
	kfree(hm);
	kfree(hr);
	return err;
}

static int asihpi_irq_count;

static irqreturn_t asihpi_isr(int irq, void *dev_id)
{
	struct hpi_adapter *a = dev_id;
	int handled;

	if (!a->adapter->irq_query_and_clear) {
		pr_err("asihpi_isr ASI%04X:%d no handler\n", a->adapter->type,
			a->adapter->index);
		return IRQ_NONE;
	}

	handled = a->adapter->irq_query_and_clear(a->adapter, 0);

	if (!handled)
		return IRQ_NONE;

	asihpi_irq_count++;
	/* printk(KERN_INFO "asihpi_isr %d ASI%04X:%d irq handled\n",
	   asihpi_irq_count, a->adapter->type, a->adapter->index); */

	if (a->interrupt_callback)
		a->interrupt_callback(a);

	return IRQ_HANDLED;
}

int asihpi_adapter_probe(struct pci_dev *pci_dev,
			 const struct pci_device_id *pci_id)
{
	int idx, nm, low_latency_mode = 0, irq_supported = 0;
	int adapter_index;
	unsigned int memlen;
	struct hpi_message hm;
	struct hpi_response hr;
	struct hpi_adapter adapter;
	struct hpi_pci pci;

	memset(&adapter, 0, sizeof(adapter));

	dev_printk(KERN_DEBUG, &pci_dev->dev,
		"probe %04x:%04x,%04x:%04x,%04x\n", pci_dev->vendor,
		pci_dev->device, pci_dev->subsystem_vendor,
		pci_dev->subsystem_device, pci_dev->devfn);

	if (pci_enable_device(pci_dev) < 0) {
		dev_err(&pci_dev->dev,
			"pci_enable_device failed, disabling device\n");
		return -EIO;
	}

	pci_set_master(pci_dev);	/* also sets latency timer if < 16 */

	hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
		HPI_SUBSYS_CREATE_ADAPTER);
	hpi_init_response(&hr, HPI_OBJ_SUBSYSTEM, HPI_SUBSYS_CREATE_ADAPTER,
		HPI_ERROR_PROCESSING_MESSAGE);

	hm.adapter_index = HPI_ADAPTER_INDEX_INVALID;

	nm = HPI_MAX_ADAPTER_MEM_SPACES;

	for (idx = 0; idx < nm; idx++) {
		HPI_DEBUG_LOG(INFO, "resource %d %pR\n", idx,
			&pci_dev->resource[idx]);

		if (pci_resource_flags(pci_dev, idx) & IORESOURCE_MEM) {
			memlen = pci_resource_len(pci_dev, idx);
			pci.ap_mem_base[idx] =
				ioremap(pci_resource_start(pci_dev, idx),
				memlen);
			if (!pci.ap_mem_base[idx]) {
				HPI_DEBUG_LOG(ERROR,
					"ioremap failed, aborting\n");
				/* unmap previously mapped pci mem space */
				goto err;
			}
		}
	}

	pci.pci_dev = pci_dev;
	hm.u.s.resource.bus_type = HPI_BUS_PCI;
	hm.u.s.resource.r.pci = &pci;

	/* call CreateAdapterObject on the relevant hpi module */
	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
	if (hr.error)
		goto err;

	adapter_index = hr.u.s.adapter_index;
	adapter.adapter = hpi_find_adapter(adapter_index);

	if (prealloc_stream_buf) {
		adapter.p_buffer = vmalloc(prealloc_stream_buf);
		if (!adapter.p_buffer) {
			HPI_DEBUG_LOG(ERROR,
				"HPI could not allocate "
				"kernel buffer size %d\n",
				prealloc_stream_buf);
			goto err;
		}
	}

	hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
		HPI_ADAPTER_OPEN);
	hm.adapter_index = adapter.adapter->index;
	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);

	if (hr.error) {
		HPI_DEBUG_LOG(ERROR, "HPI_ADAPTER_OPEN failed, aborting\n");
		goto err;
	}

	/* Check if current mode == Low Latency mode */
	hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
		HPI_ADAPTER_GET_MODE);
	hm.adapter_index = adapter.adapter->index;
	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);

	if (!hr.error
		&& hr.u.ax.mode.adapter_mode == HPI_ADAPTER_MODE_LOW_LATENCY)
		low_latency_mode = 1;
	else
		dev_info(&pci_dev->dev,
			"Adapter at index %d is not in low latency mode\n",
			adapter.adapter->index);

	/* Check if IRQs are supported */
	hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
		HPI_ADAPTER_GET_PROPERTY);
	hm.adapter_index = adapter.adapter->index;
	hm.u.ax.property_set.property = HPI_ADAPTER_PROPERTY_SUPPORTS_IRQ;
	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
	if (hr.error || !hr.u.ax.property_get.parameter1) {
		dev_info(&pci_dev->dev,
			"IRQs not supported by adapter at index %d\n",
			adapter.adapter->index);
	} else {
		irq_supported = 1;
	}

	/* WARNING can't init mutex in 'adapter'
	 * and then copy it to adapters[] ?!?!
	 */
	adapters[adapter_index] = adapter;
	mutex_init(&adapters[adapter_index].mutex);
	pci_set_drvdata(pci_dev, &adapters[adapter_index]);

	if (low_latency_mode && irq_supported) {
		if (!adapter.adapter->irq_query_and_clear) {
			dev_err(&pci_dev->dev,
				"no IRQ handler for adapter %d, aborting\n",
				adapter.adapter->index);
			goto err;
		}

		/* Disable IRQ generation on DSP side by setting the rate to 0 */
		hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
			HPI_ADAPTER_SET_PROPERTY);
		hm.adapter_index = adapter.adapter->index;
		hm.u.ax.property_set.property = HPI_ADAPTER_PROPERTY_IRQ_RATE;
		hm.u.ax.property_set.parameter1 = 0;
		hm.u.ax.property_set.parameter2 = 0;
		hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
		if (hr.error) {
			HPI_DEBUG_LOG(ERROR,
				"HPI_ADAPTER_GET_MODE failed, aborting\n");
			goto err;
		}

		/* Note: request_irq calls asihpi_isr here */
		if (request_irq(pci_dev->irq, asihpi_isr, IRQF_SHARED,
				"asihpi", &adapters[adapter_index])) {
			dev_err(&pci_dev->dev, "request_irq(%d) failed\n",
				pci_dev->irq);
			goto err;
		}

		adapters[adapter_index].interrupt_mode = 1;

		dev_info(&pci_dev->dev, "using irq %d\n", pci_dev->irq);
		adapters[adapter_index].irq = pci_dev->irq;
	} else {
		dev_info(&pci_dev->dev, "using polled mode\n");
	}

	dev_info(&pci_dev->dev, "probe succeeded for ASI%04X HPI index %d\n",
		 adapter.adapter->type, adapter_index);

	return 0;

err:
	for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; idx++) {
		if (pci.ap_mem_base[idx]) {
			iounmap(pci.ap_mem_base[idx]);
			pci.ap_mem_base[idx] = NULL;
		}
	}

	if (adapter.p_buffer) {
		adapter.buffer_size = 0;
		vfree(adapter.p_buffer);
	}

	HPI_DEBUG_LOG(ERROR, "adapter_probe failed\n");
	return -ENODEV;
}

void asihpi_adapter_remove(struct pci_dev *pci_dev)
{
	int idx;
	struct hpi_message hm;
	struct hpi_response hr;
	struct hpi_adapter *pa;
	struct hpi_pci pci;

	pa = pci_get_drvdata(pci_dev);
	pci = pa->adapter->pci;

	/* Disable IRQ generation on DSP side */
	hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
		HPI_ADAPTER_SET_PROPERTY);
	hm.adapter_index = pa->adapter->index;
	hm.u.ax.property_set.property = HPI_ADAPTER_PROPERTY_IRQ_RATE;
	hm.u.ax.property_set.parameter1 = 0;
	hm.u.ax.property_set.parameter2 = 0;
	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);

	hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
		HPI_ADAPTER_DELETE);
	hm.adapter_index = pa->adapter->index;
	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);

	/* unmap PCI memory space, mapped during device init. */
	for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; ++idx)
		iounmap(pci.ap_mem_base[idx]);

	if (pa->irq)
		free_irq(pa->irq, pa);

	vfree(pa->p_buffer);

	if (1)
		dev_info(&pci_dev->dev,
			 "remove %04x:%04x,%04x:%04x,%04x, HPI index %d\n",
			 pci_dev->vendor, pci_dev->device,
			 pci_dev->subsystem_vendor, pci_dev->subsystem_device,
			 pci_dev->devfn, pa->adapter->index);

	memset(pa, 0, sizeof(*pa));
}

void __init asihpi_init(void)
{
	struct hpi_message hm;
	struct hpi_response hr;

	memset(adapters, 0, sizeof(adapters));

	printk(KERN_INFO "ASIHPI driver " HPI_VER_STRING "\n");

	hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
		HPI_SUBSYS_DRIVER_LOAD);
	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
}

void asihpi_exit(void)
{
	struct hpi_message hm;
	struct hpi_response hr;

	hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
		HPI_SUBSYS_DRIVER_UNLOAD);
	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
}