Merge tag 'reset-for-v5.3' of git://git.pengutronix.de/git/pza/linux into arm/drivers
[sfrench/cifs-2.6.git] / sound / soc / intel / atom / sst / sst_pvt.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  *  sst_pvt.c - Intel SST Driver for audio engine
4  *
5  *  Copyright (C) 2008-14       Intel Corp
6  *  Authors:    Vinod Koul <vinod.koul@intel.com>
7  *              Harsha Priya <priya.harsha@intel.com>
8  *              Dharageswari R <dharageswari.r@intel.com>
9  *              KP Jeeja <jeeja.kp@intel.com>
10  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
11  *
12  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
13  */
14 #include <linux/kobject.h>
15 #include <linux/pci.h>
16 #include <linux/fs.h>
17 #include <linux/firmware.h>
18 #include <linux/pm_runtime.h>
19 #include <linux/sched.h>
20 #include <linux/delay.h>
21 #include <sound/asound.h>
22 #include <sound/core.h>
23 #include <sound/pcm.h>
24 #include <sound/soc.h>
25 #include <sound/compress_driver.h>
26 #include <asm/platform_sst_audio.h>
27 #include "../sst-mfld-platform.h"
28 #include "sst.h"
29 #include "../../common/sst-dsp.h"
30
31 int sst_shim_write(void __iomem *addr, int offset, int value)
32 {
33         writel(value, addr + offset);
34         return 0;
35 }
36
37 u32 sst_shim_read(void __iomem *addr, int offset)
38 {
39         return readl(addr + offset);
40 }
41
42 u64 sst_reg_read64(void __iomem *addr, int offset)
43 {
44         u64 val = 0;
45
46         memcpy_fromio(&val, addr + offset, sizeof(val));
47
48         return val;
49 }
50
51 int sst_shim_write64(void __iomem *addr, int offset, u64 value)
52 {
53         memcpy_toio(addr + offset, &value, sizeof(value));
54         return 0;
55 }
56
57 u64 sst_shim_read64(void __iomem *addr, int offset)
58 {
59         u64 val = 0;
60
61         memcpy_fromio(&val, addr + offset, sizeof(val));
62         return val;
63 }
64
65 void sst_set_fw_state_locked(
66                 struct intel_sst_drv *sst_drv_ctx, int sst_state)
67 {
68         mutex_lock(&sst_drv_ctx->sst_lock);
69         sst_drv_ctx->sst_state = sst_state;
70         mutex_unlock(&sst_drv_ctx->sst_lock);
71 }
72
73 /*
74  * sst_wait_interruptible - wait on event
75  *
76  * @sst_drv_ctx: Driver context
77  * @block: Driver block to wait on
78  *
79  * This function waits without a timeout (and is interruptable) for a
80  * given block event
81  */
82 int sst_wait_interruptible(struct intel_sst_drv *sst_drv_ctx,
83                                 struct sst_block *block)
84 {
85         int retval = 0;
86
87         if (!wait_event_interruptible(sst_drv_ctx->wait_queue,
88                                 block->condition)) {
89                 /* event wake */
90                 if (block->ret_code < 0) {
91                         dev_err(sst_drv_ctx->dev,
92                                 "stream failed %d\n", block->ret_code);
93                         retval = -EBUSY;
94                 } else {
95                         dev_dbg(sst_drv_ctx->dev, "event up\n");
96                         retval = 0;
97                 }
98         } else {
99                 dev_err(sst_drv_ctx->dev, "signal interrupted\n");
100                 retval = -EINTR;
101         }
102         return retval;
103
104 }
105
106 /*
107  * sst_wait_timeout - wait on event for timeout
108  *
109  * @sst_drv_ctx: Driver context
110  * @block: Driver block to wait on
111  *
112  * This function waits with a timeout value (and is not interruptible) on a
113  * given block event
114  */
115 int sst_wait_timeout(struct intel_sst_drv *sst_drv_ctx, struct sst_block *block)
116 {
117         int retval = 0;
118
119         /*
120          * NOTE:
121          * Observed that FW processes the alloc msg and replies even
122          * before the alloc thread has finished execution
123          */
124         dev_dbg(sst_drv_ctx->dev,
125                 "waiting for condition %x ipc %d drv_id %d\n",
126                 block->condition, block->msg_id, block->drv_id);
127         if (wait_event_timeout(sst_drv_ctx->wait_queue,
128                                 block->condition,
129                                 msecs_to_jiffies(SST_BLOCK_TIMEOUT))) {
130                 /* event wake */
131                 dev_dbg(sst_drv_ctx->dev, "Event wake %x\n",
132                                 block->condition);
133                 dev_dbg(sst_drv_ctx->dev, "message ret: %d\n",
134                                 block->ret_code);
135                 retval = -block->ret_code;
136         } else {
137                 block->on = false;
138                 dev_err(sst_drv_ctx->dev,
139                         "Wait timed-out condition:%#x, msg_id:%#x fw_state %#x\n",
140                         block->condition, block->msg_id, sst_drv_ctx->sst_state);
141                 sst_drv_ctx->sst_state = SST_RESET;
142
143                 retval = -EBUSY;
144         }
145         return retval;
146 }
147
148 /*
149  * sst_create_ipc_msg - create a IPC message
150  *
151  * @arg: ipc message
152  * @large: large or short message
153  *
154  * this function allocates structures to send a large or short
155  * message to the firmware
156  */
157 int sst_create_ipc_msg(struct ipc_post **arg, bool large)
158 {
159         struct ipc_post *msg;
160
161         msg = kzalloc(sizeof(*msg), GFP_ATOMIC);
162         if (!msg)
163                 return -ENOMEM;
164         if (large) {
165                 msg->mailbox_data = kzalloc(SST_MAILBOX_SIZE, GFP_ATOMIC);
166                 if (!msg->mailbox_data) {
167                         kfree(msg);
168                         return -ENOMEM;
169                 }
170         } else {
171                 msg->mailbox_data = NULL;
172         }
173         msg->is_large = large;
174         *arg = msg;
175         return 0;
176 }
177
178 /*
179  * sst_create_block_and_ipc_msg - Creates IPC message and sst block
180  * @arg: passed to sst_create_ipc_message API
181  * @large: large or short message
182  * @sst_drv_ctx: sst driver context
183  * @block: return block allocated
184  * @msg_id: IPC
185  * @drv_id: stream id or private id
186  */
187 int sst_create_block_and_ipc_msg(struct ipc_post **arg, bool large,
188                 struct intel_sst_drv *sst_drv_ctx, struct sst_block **block,
189                 u32 msg_id, u32 drv_id)
190 {
191         int retval = 0;
192
193         retval = sst_create_ipc_msg(arg, large);
194         if (retval)
195                 return retval;
196         *block = sst_create_block(sst_drv_ctx, msg_id, drv_id);
197         if (*block == NULL) {
198                 kfree(*arg);
199                 return -ENOMEM;
200         }
201         return retval;
202 }
203
204 /*
205  * sst_clean_stream - clean the stream context
206  *
207  * @stream: stream structure
208  *
209  * this function resets the stream contexts
210  * should be called in free
211  */
212 void sst_clean_stream(struct stream_info *stream)
213 {
214         stream->status = STREAM_UN_INIT;
215         stream->prev = STREAM_UN_INIT;
216         mutex_lock(&stream->lock);
217         stream->cumm_bytes = 0;
218         mutex_unlock(&stream->lock);
219 }
220
221 int sst_prepare_and_post_msg(struct intel_sst_drv *sst,
222                 int task_id, int ipc_msg, int cmd_id, int pipe_id,
223                 size_t mbox_data_len, const void *mbox_data, void **data,
224                 bool large, bool fill_dsp, bool sync, bool response)
225 {
226         struct ipc_post *msg = NULL;
227         struct ipc_dsp_hdr dsp_hdr;
228         struct sst_block *block;
229         int ret = 0, pvt_id;
230
231         pvt_id = sst_assign_pvt_id(sst);
232         if (pvt_id < 0)
233                 return pvt_id;
234
235         if (response)
236                 ret = sst_create_block_and_ipc_msg(
237                                 &msg, large, sst, &block, ipc_msg, pvt_id);
238         else
239                 ret = sst_create_ipc_msg(&msg, large);
240
241         if (ret < 0) {
242                 test_and_clear_bit(pvt_id, &sst->pvt_id);
243                 return -ENOMEM;
244         }
245
246         dev_dbg(sst->dev, "pvt_id = %d, pipe id = %d, task = %d ipc_msg: %d\n",
247                  pvt_id, pipe_id, task_id, ipc_msg);
248         sst_fill_header_mrfld(&msg->mrfld_header, ipc_msg,
249                                         task_id, large, pvt_id);
250         msg->mrfld_header.p.header_low_payload = sizeof(dsp_hdr) + mbox_data_len;
251         msg->mrfld_header.p.header_high.part.res_rqd = !sync;
252         dev_dbg(sst->dev, "header:%x\n",
253                         msg->mrfld_header.p.header_high.full);
254         dev_dbg(sst->dev, "response rqd: %x",
255                         msg->mrfld_header.p.header_high.part.res_rqd);
256         dev_dbg(sst->dev, "msg->mrfld_header.p.header_low_payload:%d",
257                         msg->mrfld_header.p.header_low_payload);
258         if (fill_dsp) {
259                 sst_fill_header_dsp(&dsp_hdr, cmd_id, pipe_id, mbox_data_len);
260                 memcpy(msg->mailbox_data, &dsp_hdr, sizeof(dsp_hdr));
261                 if (mbox_data_len) {
262                         memcpy(msg->mailbox_data + sizeof(dsp_hdr),
263                                         mbox_data, mbox_data_len);
264                 }
265         }
266
267         if (sync)
268                 sst->ops->post_message(sst, msg, true);
269         else
270                 sst_add_to_dispatch_list_and_post(sst, msg);
271
272         if (response) {
273                 ret = sst_wait_timeout(sst, block);
274                 if (ret < 0)
275                         goto out;
276
277                 if (data && block->data) {
278                         *data = kmemdup(block->data, block->size, GFP_KERNEL);
279                         if (!*data) {
280                                 ret = -ENOMEM;
281                                 goto out;
282                         }
283                 }
284         }
285 out:
286         if (response)
287                 sst_free_block(sst, block);
288         test_and_clear_bit(pvt_id, &sst->pvt_id);
289         return ret;
290 }
291
292 int sst_pm_runtime_put(struct intel_sst_drv *sst_drv)
293 {
294         int ret;
295
296         pm_runtime_mark_last_busy(sst_drv->dev);
297         ret = pm_runtime_put_autosuspend(sst_drv->dev);
298         if (ret < 0)
299                 return ret;
300         return 0;
301 }
302
303 void sst_fill_header_mrfld(union ipc_header_mrfld *header,
304                                 int msg, int task_id, int large, int drv_id)
305 {
306         header->full = 0;
307         header->p.header_high.part.msg_id = msg;
308         header->p.header_high.part.task_id = task_id;
309         header->p.header_high.part.large = large;
310         header->p.header_high.part.drv_id = drv_id;
311         header->p.header_high.part.done = 0;
312         header->p.header_high.part.busy = 1;
313         header->p.header_high.part.res_rqd = 1;
314 }
315
316 void sst_fill_header_dsp(struct ipc_dsp_hdr *dsp, int msg,
317                                         int pipe_id, int len)
318 {
319         dsp->cmd_id = msg;
320         dsp->mod_index_id = 0xff;
321         dsp->pipe_id = pipe_id;
322         dsp->length = len;
323         dsp->mod_id = 0;
324 }
325
326 #define SST_MAX_BLOCKS 15
327 /*
328  * sst_assign_pvt_id - assign a pvt id for stream
329  *
330  * @sst_drv_ctx : driver context
331  *
332  * this function assigns a private id for calls that dont have stream
333  * context yet, should be called with lock held
334  * uses bits for the id, and finds first free bits and assigns that
335  */
336 int sst_assign_pvt_id(struct intel_sst_drv *drv)
337 {
338         int local;
339
340         spin_lock(&drv->block_lock);
341         /* find first zero index from lsb */
342         local = ffz(drv->pvt_id);
343         dev_dbg(drv->dev, "pvt_id assigned --> %d\n", local);
344         if (local >= SST_MAX_BLOCKS){
345                 spin_unlock(&drv->block_lock);
346                 dev_err(drv->dev, "PVT _ID error: no free id blocks ");
347                 return -EINVAL;
348         }
349         /* toggle the index */
350         change_bit(local, &drv->pvt_id);
351         spin_unlock(&drv->block_lock);
352         return local;
353 }
354
355 int sst_validate_strid(
356                 struct intel_sst_drv *sst_drv_ctx, int str_id)
357 {
358         if (str_id <= 0 || str_id > sst_drv_ctx->info.max_streams) {
359                 dev_err(sst_drv_ctx->dev,
360                         "SST ERR: invalid stream id : %d, max %d\n",
361                         str_id, sst_drv_ctx->info.max_streams);
362                 return -EINVAL;
363         }
364
365         return 0;
366 }
367
368 struct stream_info *get_stream_info(
369                 struct intel_sst_drv *sst_drv_ctx, int str_id)
370 {
371         if (sst_validate_strid(sst_drv_ctx, str_id))
372                 return NULL;
373         return &sst_drv_ctx->streams[str_id];
374 }
375
376 int get_stream_id_mrfld(struct intel_sst_drv *sst_drv_ctx,
377                 u32 pipe_id)
378 {
379         int i;
380
381         for (i = 1; i <= sst_drv_ctx->info.max_streams; i++)
382                 if (pipe_id == sst_drv_ctx->streams[i].pipe_id)
383                         return i;
384
385         dev_dbg(sst_drv_ctx->dev, "no such pipe_id(%u)", pipe_id);
386         return -1;
387 }
388
389 u32 relocate_imr_addr_mrfld(u32 base_addr)
390 {
391         /* Get the difference from 512MB aligned base addr */
392         /* relocate the base */
393         base_addr = MRFLD_FW_VIRTUAL_BASE + (base_addr % (512 * 1024 * 1024));
394         return base_addr;
395 }
396 EXPORT_SYMBOL_GPL(relocate_imr_addr_mrfld);
397
398 void sst_add_to_dispatch_list_and_post(struct intel_sst_drv *sst,
399                                                 struct ipc_post *msg)
400 {
401         unsigned long irq_flags;
402
403         spin_lock_irqsave(&sst->ipc_spin_lock, irq_flags);
404         list_add_tail(&msg->node, &sst->ipc_dispatch_list);
405         spin_unlock_irqrestore(&sst->ipc_spin_lock, irq_flags);
406         sst->ops->post_message(sst, NULL, false);
407 }