xref: /openbmc/linux/sound/soc/intel/skylake/skl-sst.c (revision e021ae7f) 
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * skl-sst.c - HDA DSP library functions for SKL platform
4  *
5  * Copyright (C) 2014-15, Intel Corporation.
6  * Author:Rafal Redzimski <rafal.f.redzimski@intel.com>
7  *	Jeeja KP <jeeja.kp@intel.com>
8  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9  */
10 
11 #include <linux/module.h>
12 #include <linux/delay.h>
13 #include <linux/device.h>
14 #include <linux/err.h>
15 #include <linux/uuid.h>
16 #include "../common/sst-dsp.h"
17 #include "../common/sst-dsp-priv.h"
18 #include "../common/sst-ipc.h"
19 #include "skl.h"
20 
21 #define SKL_BASEFW_TIMEOUT	300
22 #define SKL_INIT_TIMEOUT	1000
23 
24 /* Intel HD Audio SRAM Window 0*/
25 #define SKL_ADSP_SRAM0_BASE	0x8000
26 
27 /* Firmware status window */
28 #define SKL_ADSP_FW_STATUS	SKL_ADSP_SRAM0_BASE
29 #define SKL_ADSP_ERROR_CODE	(SKL_ADSP_FW_STATUS + 0x4)
30 
31 #define SKL_NUM_MODULES		1
32 
33 static bool skl_check_fw_status(struct sst_dsp *ctx, u32 status)
34 {
35 	u32 cur_sts;
36 
37 	cur_sts = sst_dsp_shim_read(ctx, SKL_ADSP_FW_STATUS) & SKL_FW_STS_MASK;
38 
39 	return (cur_sts == status);
40 }
41 
42 static int skl_transfer_firmware(struct sst_dsp *ctx,
43 		const void *basefw, u32 base_fw_size)
44 {
45 	int ret = 0;
46 
47 	ret = ctx->cl_dev.ops.cl_copy_to_dmabuf(ctx, basefw, base_fw_size,
48 								true);
49 	if (ret < 0)
50 		return ret;
51 
52 	ret = sst_dsp_register_poll(ctx,
53 			SKL_ADSP_FW_STATUS,
54 			SKL_FW_STS_MASK,
55 			SKL_FW_RFW_START,
56 			SKL_BASEFW_TIMEOUT,
57 			"Firmware boot");
58 
59 	ctx->cl_dev.ops.cl_stop_dma(ctx);
60 
61 	return ret;
62 }
63 
64 #define SKL_ADSP_FW_BIN_HDR_OFFSET 0x284
65 
66 static int skl_load_base_firmware(struct sst_dsp *ctx)
67 {
68 	int ret = 0, i;
69 	struct skl_dev *skl = ctx->thread_context;
70 	struct firmware stripped_fw;
71 	u32 reg;
72 
73 	skl->boot_complete = false;
74 	init_waitqueue_head(&skl->boot_wait);
75 
76 	if (ctx->fw == NULL) {
77 		ret = request_firmware(&ctx->fw, ctx->fw_name, ctx->dev);
78 		if (ret < 0) {
79 			dev_err(ctx->dev, "Request firmware failed %d\n", ret);
80 			return -EIO;
81 		}
82 	}
83 
84 	/* prase uuids on first boot */
85 	if (skl->is_first_boot) {
86 		ret = snd_skl_parse_uuids(ctx, ctx->fw, SKL_ADSP_FW_BIN_HDR_OFFSET, 0);
87 		if (ret < 0) {
88 			dev_err(ctx->dev, "UUID parsing err: %d\n", ret);
89 			release_firmware(ctx->fw);
90 			skl_dsp_disable_core(ctx, SKL_DSP_CORE0_MASK);
91 			return ret;
92 		}
93 	}
94 
95 	/* check for extended manifest */
96 	stripped_fw.data = ctx->fw->data;
97 	stripped_fw.size = ctx->fw->size;
98 
99 	skl_dsp_strip_extended_manifest(&stripped_fw);
100 
101 	ret = skl_dsp_boot(ctx);
102 	if (ret < 0) {
103 		dev_err(ctx->dev, "Boot dsp core failed ret: %d\n", ret);
104 		goto skl_load_base_firmware_failed;
105 	}
106 
107 	ret = skl_cldma_prepare(ctx);
108 	if (ret < 0) {
109 		dev_err(ctx->dev, "CL dma prepare failed : %d\n", ret);
110 		goto skl_load_base_firmware_failed;
111 	}
112 
113 	/* enable Interrupt */
114 	skl_ipc_int_enable(ctx);
115 	skl_ipc_op_int_enable(ctx);
116 
117 	/* check ROM Status */
118 	for (i = SKL_INIT_TIMEOUT; i > 0; --i) {
119 		if (skl_check_fw_status(ctx, SKL_FW_INIT)) {
120 			dev_dbg(ctx->dev,
121 				"ROM loaded, we can continue with FW loading\n");
122 			break;
123 		}
124 		mdelay(1);
125 	}
126 	if (!i) {
127 		reg = sst_dsp_shim_read(ctx, SKL_ADSP_FW_STATUS);
128 		dev_err(ctx->dev,
129 			"Timeout waiting for ROM init done, reg:0x%x\n", reg);
130 		ret = -EIO;
131 		goto transfer_firmware_failed;
132 	}
133 
134 	ret = skl_transfer_firmware(ctx, stripped_fw.data, stripped_fw.size);
135 	if (ret < 0) {
136 		dev_err(ctx->dev, "Transfer firmware failed%d\n", ret);
137 		goto transfer_firmware_failed;
138 	} else {
139 		ret = wait_event_timeout(skl->boot_wait, skl->boot_complete,
140 					msecs_to_jiffies(SKL_IPC_BOOT_MSECS));
141 		if (ret == 0) {
142 			dev_err(ctx->dev, "DSP boot failed, FW Ready timed-out\n");
143 			ret = -EIO;
144 			goto transfer_firmware_failed;
145 		}
146 
147 		dev_dbg(ctx->dev, "Download firmware successful%d\n", ret);
148 		skl->fw_loaded = true;
149 	}
150 	return 0;
151 transfer_firmware_failed:
152 	ctx->cl_dev.ops.cl_cleanup_controller(ctx);
153 skl_load_base_firmware_failed:
154 	skl_dsp_disable_core(ctx, SKL_DSP_CORE0_MASK);
155 	release_firmware(ctx->fw);
156 	ctx->fw = NULL;
157 	return ret;
158 }
159 
160 static int skl_set_dsp_D0(struct sst_dsp *ctx, unsigned int core_id)
161 {
162 	int ret;
163 	struct skl_ipc_dxstate_info dx;
164 	struct skl_dev *skl = ctx->thread_context;
165 	unsigned int core_mask = SKL_DSP_CORE_MASK(core_id);
166 
167 	/* If core0 is being turned on, we need to load the FW */
168 	if (core_id == SKL_DSP_CORE0_ID) {
169 		ret = skl_load_base_firmware(ctx);
170 		if (ret < 0) {
171 			dev_err(ctx->dev, "unable to load firmware\n");
172 			return ret;
173 		}
174 
175 		/* load libs as they are also lost on D3 */
176 		if (skl->lib_count > 1) {
177 			ret = ctx->fw_ops.load_library(ctx, skl->lib_info,
178 							skl->lib_count);
179 			if (ret < 0) {
180 				dev_err(ctx->dev, "reload libs failed: %d\n",
181 						ret);
182 				return ret;
183 			}
184 
185 		}
186 	}
187 
188 	/*
189 	 * If any core other than core 0 is being moved to D0, enable the
190 	 * core and send the set dx IPC for the core.
191 	 */
192 	if (core_id != SKL_DSP_CORE0_ID) {
193 		ret = skl_dsp_enable_core(ctx, core_mask);
194 		if (ret < 0)
195 			return ret;
196 
197 		dx.core_mask = core_mask;
198 		dx.dx_mask = core_mask;
199 
200 		ret = skl_ipc_set_dx(&skl->ipc, SKL_INSTANCE_ID,
201 					SKL_BASE_FW_MODULE_ID, &dx);
202 		if (ret < 0) {
203 			dev_err(ctx->dev, "Failed to set dsp to D0:core id= %d\n",
204 					core_id);
205 			skl_dsp_disable_core(ctx, core_mask);
206 		}
207 	}
208 
209 	skl->cores.state[core_id] = SKL_DSP_RUNNING;
210 
211 	return 0;
212 }
213 
214 static int skl_set_dsp_D3(struct sst_dsp *ctx, unsigned int core_id)
215 {
216 	int ret;
217 	struct skl_ipc_dxstate_info dx;
218 	struct skl_dev *skl = ctx->thread_context;
219 	unsigned int core_mask = SKL_DSP_CORE_MASK(core_id);
220 
221 	dx.core_mask = core_mask;
222 	dx.dx_mask = SKL_IPC_D3_MASK;
223 
224 	ret = skl_ipc_set_dx(&skl->ipc, SKL_INSTANCE_ID, SKL_BASE_FW_MODULE_ID, &dx);
225 	if (ret < 0)
226 		dev_err(ctx->dev, "set Dx core %d fail: %d\n", core_id, ret);
227 
228 	if (core_id == SKL_DSP_CORE0_ID) {
229 		/* disable Interrupt */
230 		ctx->cl_dev.ops.cl_cleanup_controller(ctx);
231 		skl_cldma_int_disable(ctx);
232 		skl_ipc_op_int_disable(ctx);
233 		skl_ipc_int_disable(ctx);
234 	}
235 
236 	ret = skl_dsp_disable_core(ctx, core_mask);
237 	if (ret < 0)
238 		return ret;
239 
240 	skl->cores.state[core_id] = SKL_DSP_RESET;
241 	return ret;
242 }
243 
244 static unsigned int skl_get_errorcode(struct sst_dsp *ctx)
245 {
246 	 return sst_dsp_shim_read(ctx, SKL_ADSP_ERROR_CODE);
247 }
248 
249 /*
250  * since get/set_module are called from DAPM context,
251  * we don't need lock for usage count
252  */
253 static int skl_get_module(struct sst_dsp *ctx, u16 mod_id)
254 {
255 	struct skl_module_table *module;
256 
257 	list_for_each_entry(module, &ctx->module_list, list) {
258 		if (module->mod_info->mod_id == mod_id)
259 			return ++module->usage_cnt;
260 	}
261 
262 	return -EINVAL;
263 }
264 
265 static int skl_put_module(struct sst_dsp *ctx, u16 mod_id)
266 {
267 	struct skl_module_table *module;
268 
269 	list_for_each_entry(module, &ctx->module_list, list) {
270 		if (module->mod_info->mod_id == mod_id)
271 			return --module->usage_cnt;
272 	}
273 
274 	return -EINVAL;
275 }
276 
277 static struct skl_module_table *skl_fill_module_table(struct sst_dsp *ctx,
278 						char *mod_name, int mod_id)
279 {
280 	const struct firmware *fw;
281 	struct skl_module_table *skl_module;
282 	unsigned int size;
283 	int ret;
284 
285 	ret = request_firmware(&fw, mod_name, ctx->dev);
286 	if (ret < 0) {
287 		dev_err(ctx->dev, "Request Module %s failed :%d\n",
288 							mod_name, ret);
289 		return NULL;
290 	}
291 
292 	skl_module = devm_kzalloc(ctx->dev, sizeof(*skl_module), GFP_KERNEL);
293 	if (skl_module == NULL) {
294 		release_firmware(fw);
295 		return NULL;
296 	}
297 
298 	size = sizeof(*skl_module->mod_info);
299 	skl_module->mod_info = devm_kzalloc(ctx->dev, size, GFP_KERNEL);
300 	if (skl_module->mod_info == NULL) {
301 		release_firmware(fw);
302 		return NULL;
303 	}
304 
305 	skl_module->mod_info->mod_id = mod_id;
306 	skl_module->mod_info->fw = fw;
307 	list_add(&skl_module->list, &ctx->module_list);
308 
309 	return skl_module;
310 }
311 
312 /* get a module from it's unique ID */
313 static struct skl_module_table *skl_module_get_from_id(
314 			struct sst_dsp *ctx, u16 mod_id)
315 {
316 	struct skl_module_table *module;
317 
318 	if (list_empty(&ctx->module_list)) {
319 		dev_err(ctx->dev, "Module list is empty\n");
320 		return NULL;
321 	}
322 
323 	list_for_each_entry(module, &ctx->module_list, list) {
324 		if (module->mod_info->mod_id == mod_id)
325 			return module;
326 	}
327 
328 	return NULL;
329 }
330 
331 static int skl_transfer_module(struct sst_dsp *ctx, const void *data,
332 			u32 size, u16 mod_id, u8 table_id, bool is_module)
333 {
334 	int ret, bytes_left, curr_pos;
335 	struct skl_dev *skl = ctx->thread_context;
336 	skl->mod_load_complete = false;
337 
338 	bytes_left = ctx->cl_dev.ops.cl_copy_to_dmabuf(ctx, data, size, false);
339 	if (bytes_left < 0)
340 		return bytes_left;
341 
342 	/* check is_module flag to load module or library */
343 	if (is_module)
344 		ret = skl_ipc_load_modules(&skl->ipc, SKL_NUM_MODULES, &mod_id);
345 	else
346 		ret = skl_sst_ipc_load_library(&skl->ipc, 0, table_id, false);
347 
348 	if (ret < 0) {
349 		dev_err(ctx->dev, "Failed to Load %s with err %d\n",
350 				is_module ? "module" : "lib", ret);
351 		goto out;
352 	}
353 
354 	/*
355 	 * if bytes_left > 0 then wait for BDL complete interrupt and
356 	 * copy the next chunk till bytes_left is 0. if bytes_left is
357 	 * zero, then wait for load module IPC reply
358 	 */
359 	while (bytes_left > 0) {
360 		curr_pos = size - bytes_left;
361 
362 		ret = skl_cldma_wait_interruptible(ctx);
363 		if (ret < 0)
364 			goto out;
365 
366 		bytes_left = ctx->cl_dev.ops.cl_copy_to_dmabuf(ctx,
367 							data + curr_pos,
368 							bytes_left, false);
369 	}
370 
371 	ret = wait_event_timeout(skl->mod_load_wait, skl->mod_load_complete,
372 				msecs_to_jiffies(SKL_IPC_BOOT_MSECS));
373 	if (ret == 0 || !skl->mod_load_status) {
374 		dev_err(ctx->dev, "Module Load failed\n");
375 		ret = -EIO;
376 	}
377 
378 out:
379 	ctx->cl_dev.ops.cl_stop_dma(ctx);
380 
381 	return ret;
382 }
383 
384 static int
385 skl_load_library(struct sst_dsp *ctx, struct skl_lib_info *linfo, int lib_count)
386 {
387 	struct skl_dev *skl = ctx->thread_context;
388 	struct firmware stripped_fw;
389 	int ret, i;
390 
391 	/* library indices start from 1 to N. 0 represents base FW */
392 	for (i = 1; i < lib_count; i++) {
393 		ret = skl_prepare_lib_load(skl, &skl->lib_info[i], &stripped_fw,
394 					SKL_ADSP_FW_BIN_HDR_OFFSET, i);
395 		if (ret < 0)
396 			goto load_library_failed;
397 		ret = skl_transfer_module(ctx, stripped_fw.data,
398 				stripped_fw.size, 0, i, false);
399 		if (ret < 0)
400 			goto load_library_failed;
401 	}
402 
403 	return 0;
404 
405 load_library_failed:
406 	skl_release_library(linfo, lib_count);
407 	return ret;
408 }
409 
410 static int skl_load_module(struct sst_dsp *ctx, u16 mod_id, u8 *guid)
411 {
412 	struct skl_module_table *module_entry = NULL;
413 	int ret = 0;
414 	char mod_name[64]; /* guid str = 32 chars + 4 hyphens */
415 
416 	snprintf(mod_name, sizeof(mod_name), "intel/dsp_fw_%pUL.bin", guid);
417 
418 	module_entry = skl_module_get_from_id(ctx, mod_id);
419 	if (module_entry == NULL) {
420 		module_entry = skl_fill_module_table(ctx, mod_name, mod_id);
421 		if (module_entry == NULL) {
422 			dev_err(ctx->dev, "Failed to Load module\n");
423 			return -EINVAL;
424 		}
425 	}
426 
427 	if (!module_entry->usage_cnt) {
428 		ret = skl_transfer_module(ctx, module_entry->mod_info->fw->data,
429 				module_entry->mod_info->fw->size,
430 				mod_id, 0, true);
431 		if (ret < 0) {
432 			dev_err(ctx->dev, "Failed to Load module\n");
433 			return ret;
434 		}
435 	}
436 
437 	ret = skl_get_module(ctx, mod_id);
438 
439 	return ret;
440 }
441 
442 static int skl_unload_module(struct sst_dsp *ctx, u16 mod_id)
443 {
444 	int usage_cnt;
445 	struct skl_dev *skl = ctx->thread_context;
446 	int ret = 0;
447 
448 	usage_cnt = skl_put_module(ctx, mod_id);
449 	if (usage_cnt < 0) {
450 		dev_err(ctx->dev, "Module bad usage cnt!:%d\n", usage_cnt);
451 		return -EIO;
452 	}
453 
454 	/* if module is used by others return, no need to unload */
455 	if (usage_cnt > 0)
456 		return 0;
457 
458 	ret = skl_ipc_unload_modules(&skl->ipc,
459 			SKL_NUM_MODULES, &mod_id);
460 	if (ret < 0) {
461 		dev_err(ctx->dev, "Failed to UnLoad module\n");
462 		skl_get_module(ctx, mod_id);
463 		return ret;
464 	}
465 
466 	return ret;
467 }
468 
469 void skl_clear_module_cnt(struct sst_dsp *ctx)
470 {
471 	struct skl_module_table *module;
472 
473 	if (list_empty(&ctx->module_list))
474 		return;
475 
476 	list_for_each_entry(module, &ctx->module_list, list) {
477 		module->usage_cnt = 0;
478 	}
479 }
480 EXPORT_SYMBOL_GPL(skl_clear_module_cnt);
481 
482 static void skl_clear_module_table(struct sst_dsp *ctx)
483 {
484 	struct skl_module_table *module, *tmp;
485 
486 	if (list_empty(&ctx->module_list))
487 		return;
488 
489 	list_for_each_entry_safe(module, tmp, &ctx->module_list, list) {
490 		list_del(&module->list);
491 		release_firmware(module->mod_info->fw);
492 	}
493 }
494 
495 static const struct skl_dsp_fw_ops skl_fw_ops = {
496 	.set_state_D0 = skl_set_dsp_D0,
497 	.set_state_D3 = skl_set_dsp_D3,
498 	.load_fw = skl_load_base_firmware,
499 	.get_fw_errcode = skl_get_errorcode,
500 	.load_library = skl_load_library,
501 	.load_mod = skl_load_module,
502 	.unload_mod = skl_unload_module,
503 };
504 
505 static struct sst_ops skl_ops = {
506 	.irq_handler = skl_dsp_sst_interrupt,
507 	.write = sst_shim32_write,
508 	.read = sst_shim32_read,
509 	.free = skl_dsp_free,
510 };
511 
512 static struct sst_dsp_device skl_dev = {
513 	.thread = skl_dsp_irq_thread_handler,
514 	.ops = &skl_ops,
515 };
516 
517 int skl_sst_dsp_init(struct device *dev, void __iomem *mmio_base, int irq,
518 		const char *fw_name, struct skl_dsp_loader_ops dsp_ops,
519 		struct skl_dev **dsp)
520 {
521 	struct skl_dev *skl;
522 	struct sst_dsp *sst;
523 	int ret;
524 
525 	ret = skl_sst_ctx_init(dev, irq, fw_name, dsp_ops, dsp, &skl_dev);
526 	if (ret < 0) {
527 		dev_err(dev, "%s: no device\n", __func__);
528 		return ret;
529 	}
530 
531 	skl = *dsp;
532 	sst = skl->dsp;
533 	sst->addr.lpe = mmio_base;
534 	sst->addr.shim = mmio_base;
535 	sst->addr.sram0_base = SKL_ADSP_SRAM0_BASE;
536 	sst->addr.sram1_base = SKL_ADSP_SRAM1_BASE;
537 	sst->addr.w0_stat_sz = SKL_ADSP_W0_STAT_SZ;
538 	sst->addr.w0_up_sz = SKL_ADSP_W0_UP_SZ;
539 
540 	sst_dsp_mailbox_init(sst, (SKL_ADSP_SRAM0_BASE + SKL_ADSP_W0_STAT_SZ),
541 			SKL_ADSP_W0_UP_SZ, SKL_ADSP_SRAM1_BASE, SKL_ADSP_W1_SZ);
542 
543 	ret = skl_ipc_init(dev, skl);
544 	if (ret) {
545 		skl_dsp_free(sst);
546 		return ret;
547 	}
548 
549 	sst->fw_ops = skl_fw_ops;
550 
551 	return skl_dsp_acquire_irq(sst);
552 }
553 EXPORT_SYMBOL_GPL(skl_sst_dsp_init);
554 
555 int skl_sst_init_fw(struct device *dev, struct skl_dev *skl)
556 {
557 	int ret;
558 	struct sst_dsp *sst = skl->dsp;
559 
560 	ret = sst->fw_ops.load_fw(sst);
561 	if (ret < 0) {
562 		dev_err(dev, "Load base fw failed : %d\n", ret);
563 		return ret;
564 	}
565 
566 	skl_dsp_init_core_state(sst);
567 
568 	if (skl->lib_count > 1) {
569 		ret = sst->fw_ops.load_library(sst, skl->lib_info,
570 						skl->lib_count);
571 		if (ret < 0) {
572 			dev_err(dev, "Load Library failed : %x\n", ret);
573 			return ret;
574 		}
575 	}
576 	skl->is_first_boot = false;
577 
578 	return 0;
579 }
580 EXPORT_SYMBOL_GPL(skl_sst_init_fw);
581 
582 void skl_sst_dsp_cleanup(struct device *dev, struct skl_dev *skl)
583 {
584 
585 	if (skl->dsp->fw)
586 		release_firmware(skl->dsp->fw);
587 	skl_clear_module_table(skl->dsp);
588 	skl_freeup_uuid_list(skl);
589 	skl_ipc_free(&skl->ipc);
590 	skl->dsp->ops->free(skl->dsp);
591 	if (skl->boot_complete) {
592 		skl->dsp->cl_dev.ops.cl_cleanup_controller(skl->dsp);
593 		skl_cldma_int_disable(skl->dsp);
594 	}
595 }
596 EXPORT_SYMBOL_GPL(skl_sst_dsp_cleanup);
597 
598 MODULE_LICENSE("GPL v2");
599 MODULE_DESCRIPTION("Intel Skylake IPC driver");
600