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linux/linux-5.4.31/sound/soc/sof/core.c

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// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
//
// This file is provided under a dual BSD/GPLv2 license. When using or
// redistributing this file, you may do so under either license.
//
// Copyright(c) 2018 Intel Corporation. All rights reserved.
//
// Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
//
#include <linux/firmware.h>
#include <linux/module.h>
#include <asm/unaligned.h>
#include <sound/soc.h>
#include <sound/sof.h>
#include "sof-priv.h"
#include "ops.h"
/* SOF defaults if not provided by the platform in ms */
#define TIMEOUT_DEFAULT_IPC_MS 500
#define TIMEOUT_DEFAULT_BOOT_MS 2000
/*
* Generic object lookup APIs.
*/
struct snd_sof_pcm *snd_sof_find_spcm_name(struct snd_sof_dev *sdev,
const char *name)
{
struct snd_sof_pcm *spcm;
list_for_each_entry(spcm, &sdev->pcm_list, list) {
/* match with PCM dai name */
if (strcmp(spcm->pcm.dai_name, name) == 0)
return spcm;
/* match with playback caps name if set */
if (*spcm->pcm.caps[0].name &&
!strcmp(spcm->pcm.caps[0].name, name))
return spcm;
/* match with capture caps name if set */
if (*spcm->pcm.caps[1].name &&
!strcmp(spcm->pcm.caps[1].name, name))
return spcm;
}
return NULL;
}
struct snd_sof_pcm *snd_sof_find_spcm_comp(struct snd_sof_dev *sdev,
unsigned int comp_id,
int *direction)
{
struct snd_sof_pcm *spcm;
list_for_each_entry(spcm, &sdev->pcm_list, list) {
if (spcm->stream[SNDRV_PCM_STREAM_PLAYBACK].comp_id == comp_id) {
*direction = SNDRV_PCM_STREAM_PLAYBACK;
return spcm;
}
if (spcm->stream[SNDRV_PCM_STREAM_CAPTURE].comp_id == comp_id) {
*direction = SNDRV_PCM_STREAM_CAPTURE;
return spcm;
}
}
return NULL;
}
struct snd_sof_pcm *snd_sof_find_spcm_pcm_id(struct snd_sof_dev *sdev,
unsigned int pcm_id)
{
struct snd_sof_pcm *spcm;
list_for_each_entry(spcm, &sdev->pcm_list, list) {
if (le32_to_cpu(spcm->pcm.pcm_id) == pcm_id)
return spcm;
}
return NULL;
}
struct snd_sof_widget *snd_sof_find_swidget(struct snd_sof_dev *sdev,
const char *name)
{
struct snd_sof_widget *swidget;
list_for_each_entry(swidget, &sdev->widget_list, list) {
if (strcmp(name, swidget->widget->name) == 0)
return swidget;
}
return NULL;
}
/* find widget by stream name and direction */
struct snd_sof_widget *snd_sof_find_swidget_sname(struct snd_sof_dev *sdev,
const char *pcm_name, int dir)
{
struct snd_sof_widget *swidget;
enum snd_soc_dapm_type type;
if (dir == SNDRV_PCM_STREAM_PLAYBACK)
type = snd_soc_dapm_aif_in;
else
type = snd_soc_dapm_aif_out;
list_for_each_entry(swidget, &sdev->widget_list, list) {
if (!strcmp(pcm_name, swidget->widget->sname) && swidget->id == type)
return swidget;
}
return NULL;
}
struct snd_sof_dai *snd_sof_find_dai(struct snd_sof_dev *sdev,
const char *name)
{
struct snd_sof_dai *dai;
list_for_each_entry(dai, &sdev->dai_list, list) {
if (dai->name && (strcmp(name, dai->name) == 0))
return dai;
}
return NULL;
}
/*
* FW Panic/fault handling.
*/
struct sof_panic_msg {
u32 id;
const char *msg;
};
/* standard FW panic types */
static const struct sof_panic_msg panic_msg[] = {
{SOF_IPC_PANIC_MEM, "out of memory"},
{SOF_IPC_PANIC_WORK, "work subsystem init failed"},
{SOF_IPC_PANIC_IPC, "IPC subsystem init failed"},
{SOF_IPC_PANIC_ARCH, "arch init failed"},
{SOF_IPC_PANIC_PLATFORM, "platform init failed"},
{SOF_IPC_PANIC_TASK, "scheduler init failed"},
{SOF_IPC_PANIC_EXCEPTION, "runtime exception"},
{SOF_IPC_PANIC_DEADLOCK, "deadlock"},
{SOF_IPC_PANIC_STACK, "stack overflow"},
{SOF_IPC_PANIC_IDLE, "can't enter idle"},
{SOF_IPC_PANIC_WFI, "invalid wait state"},
{SOF_IPC_PANIC_ASSERT, "assertion failed"},
};
/*
* helper to be called from .dbg_dump callbacks. No error code is
* provided, it's left as an exercise for the caller of .dbg_dump
* (typically IPC or loader)
*/
void snd_sof_get_status(struct snd_sof_dev *sdev, u32 panic_code,
u32 tracep_code, void *oops,
struct sof_ipc_panic_info *panic_info,
void *stack, size_t stack_words)
{
u32 code;
int i;
/* is firmware dead ? */
if ((panic_code & SOF_IPC_PANIC_MAGIC_MASK) != SOF_IPC_PANIC_MAGIC) {
dev_err(sdev->dev, "error: unexpected fault 0x%8.8x trace 0x%8.8x\n",
panic_code, tracep_code);
return; /* no fault ? */
}
code = panic_code & (SOF_IPC_PANIC_MAGIC_MASK | SOF_IPC_PANIC_CODE_MASK);
for (i = 0; i < ARRAY_SIZE(panic_msg); i++) {
if (panic_msg[i].id == code) {
dev_err(sdev->dev, "error: %s\n", panic_msg[i].msg);
dev_err(sdev->dev, "error: trace point %8.8x\n",
tracep_code);
goto out;
}
}
/* unknown error */
dev_err(sdev->dev, "error: unknown reason %8.8x\n", panic_code);
dev_err(sdev->dev, "error: trace point %8.8x\n", tracep_code);
out:
dev_err(sdev->dev, "error: panic at %s:%d\n",
panic_info->filename, panic_info->linenum);
sof_oops(sdev, oops);
sof_stack(sdev, oops, stack, stack_words);
}
EXPORT_SYMBOL(snd_sof_get_status);
/*
* Generic buffer page table creation.
* Take the each physical page address and drop the least significant unused
* bits from each (based on PAGE_SIZE). Then pack valid page address bits
* into compressed page table.
*/
int snd_sof_create_page_table(struct snd_sof_dev *sdev,
struct snd_dma_buffer *dmab,
unsigned char *page_table, size_t size)
{
int i, pages;
pages = snd_sgbuf_aligned_pages(size);
dev_dbg(sdev->dev, "generating page table for %p size 0x%zx pages %d\n",
dmab->area, size, pages);
for (i = 0; i < pages; i++) {
/*
* The number of valid address bits for each page is 20.
* idx determines the byte position within page_table
* where the current page's address is stored
* in the compressed page_table.
* This can be calculated by multiplying the page number by 2.5.
*/
u32 idx = (5 * i) >> 1;
u32 pfn = snd_sgbuf_get_addr(dmab, i * PAGE_SIZE) >> PAGE_SHIFT;
u8 *pg_table;
dev_vdbg(sdev->dev, "pfn i %i idx %d pfn %x\n", i, idx, pfn);
pg_table = (u8 *)(page_table + idx);
/*
* pagetable compression:
* byte 0 byte 1 byte 2 byte 3 byte 4 byte 5
* ___________pfn 0__________ __________pfn 1___________ _pfn 2...
* .... .... .... .... .... .... .... .... .... .... ....
* It is created by:
* 1. set current location to 0, PFN index i to 0
* 2. put pfn[i] at current location in Little Endian byte order
* 3. calculate an intermediate value as
* x = (pfn[i+1] << 4) | (pfn[i] & 0xf)
* 4. put x at offset (current location + 2) in LE byte order
* 5. increment current location by 5 bytes, increment i by 2
* 6. continue to (2)
*/
if (i & 1)
put_unaligned_le32((pg_table[0] & 0xf) | pfn << 4,
pg_table);
else
put_unaligned_le32(pfn, pg_table);
}
return pages;
}
/*
* SOF Driver enumeration.
*/
static int sof_machine_check(struct snd_sof_dev *sdev)
{
struct snd_sof_pdata *plat_data = sdev->pdata;
#if IS_ENABLED(CONFIG_SND_SOC_SOF_NOCODEC)
struct snd_soc_acpi_mach *machine;
int ret;
#endif
if (plat_data->machine)
return 0;
#if !IS_ENABLED(CONFIG_SND_SOC_SOF_NOCODEC)
dev_err(sdev->dev, "error: no matching ASoC machine driver found - aborting probe\n");
return -ENODEV;
#else
/* fallback to nocodec mode */
dev_warn(sdev->dev, "No ASoC machine driver found - using nocodec\n");
machine = devm_kzalloc(sdev->dev, sizeof(*machine), GFP_KERNEL);
if (!machine)
return -ENOMEM;
ret = sof_nocodec_setup(sdev->dev, plat_data, machine,
plat_data->desc, plat_data->desc->ops);
if (ret < 0)
return ret;
plat_data->machine = machine;
return 0;
#endif
}
/*
* FW Boot State Transition Diagram
*
* +-----------------------------------------------------------------------+
* | |
* ------------------ ------------------ |
* | | | | |
* | BOOT_FAILED | | READY_FAILED |-------------------------+ |
* | | | | | |
* ------------------ ------------------ | |
* ^ ^ | |
* | | | |
* (FW Boot Timeout) (FW_READY FAIL) | |
* | | | |
* | | | |
* ------------------ | ------------------ | |
* | | | | | | |
* | IN_PROGRESS |---------------+------------->| COMPLETE | | |
* | | (FW Boot OK) (FW_READY OK) | | | |
* ------------------ ------------------ | |
* ^ | | |
* | | | |
* (FW Loading OK) (System Suspend/Runtime Suspend)
* | | | |
* | | | |
* ------------------ ------------------ | | |
* | | | |<-----+ | |
* | PREPARE | | NOT_STARTED |<---------------------+ |
* | | | |<---------------------------+
* ------------------ ------------------
* | ^ | ^
* | | | |
* | +-----------------------+ |
* | (DSP Probe OK) |
* | |
* | |
* +------------------------------------+
* (System Suspend/Runtime Suspend)
*/
static int sof_probe_continue(struct snd_sof_dev *sdev)
{
struct snd_sof_pdata *plat_data = sdev->pdata;
const char *drv_name;
const void *mach;
int size;
int ret;
/* probe the DSP hardware */
ret = snd_sof_probe(sdev);
if (ret < 0) {
dev_err(sdev->dev, "error: failed to probe DSP %d\n", ret);
return ret;
}
sdev->fw_state = SOF_FW_BOOT_PREPARE;
/* check machine info */
ret = sof_machine_check(sdev);
if (ret < 0) {
dev_err(sdev->dev, "error: failed to get machine info %d\n",
ret);
goto dbg_err;
}
/* set up platform component driver */
snd_sof_new_platform_drv(sdev);
/* register any debug/trace capabilities */
ret = snd_sof_dbg_init(sdev);
if (ret < 0) {
/*
* debugfs issues are suppressed in snd_sof_dbg_init() since
* we cannot rely on debugfs
* here we trap errors due to memory allocation only.
*/
dev_err(sdev->dev, "error: failed to init DSP trace/debug %d\n",
ret);
goto dbg_err;
}
/* init the IPC */
sdev->ipc = snd_sof_ipc_init(sdev);
if (!sdev->ipc) {
dev_err(sdev->dev, "error: failed to init DSP IPC %d\n", ret);
goto ipc_err;
}
/* load the firmware */
ret = snd_sof_load_firmware(sdev);
if (ret < 0) {
dev_err(sdev->dev, "error: failed to load DSP firmware %d\n",
ret);
goto fw_load_err;
}
sdev->fw_state = SOF_FW_BOOT_IN_PROGRESS;
/*
* Boot the firmware. The FW boot status will be modified
* in snd_sof_run_firmware() depending on the outcome.
*/
ret = snd_sof_run_firmware(sdev);
if (ret < 0) {
dev_err(sdev->dev, "error: failed to boot DSP firmware %d\n",
ret);
goto fw_run_err;
}
/* init DMA trace */
ret = snd_sof_init_trace(sdev);
if (ret < 0) {
/* non fatal */
dev_warn(sdev->dev,
"warning: failed to initialize trace %d\n", ret);
}
/* hereafter all FW boot flows are for PM reasons */
sdev->first_boot = false;
/* now register audio DSP platform driver and dai */
ret = devm_snd_soc_register_component(sdev->dev, &sdev->plat_drv,
sof_ops(sdev)->drv,
sof_ops(sdev)->num_drv);
if (ret < 0) {
dev_err(sdev->dev,
"error: failed to register DSP DAI driver %d\n", ret);
goto fw_trace_err;
}
drv_name = plat_data->machine->drv_name;
mach = (const void *)plat_data->machine;
size = sizeof(*plat_data->machine);
/* register machine driver, pass machine info as pdata */
plat_data->pdev_mach =
platform_device_register_data(sdev->dev, drv_name,
PLATFORM_DEVID_NONE, mach, size);
if (IS_ERR(plat_data->pdev_mach)) {
ret = PTR_ERR(plat_data->pdev_mach);
goto fw_trace_err;
}
dev_dbg(sdev->dev, "created machine %s\n",
dev_name(&plat_data->pdev_mach->dev));
if (plat_data->sof_probe_complete)
plat_data->sof_probe_complete(sdev->dev);
return 0;
fw_trace_err:
snd_sof_free_trace(sdev);
fw_run_err:
snd_sof_fw_unload(sdev);
fw_load_err:
snd_sof_ipc_free(sdev);
ipc_err:
snd_sof_free_debug(sdev);
dbg_err:
snd_sof_remove(sdev);
/* all resources freed, update state to match */
sdev->fw_state = SOF_FW_BOOT_NOT_STARTED;
sdev->first_boot = true;
return ret;
}
static void sof_probe_work(struct work_struct *work)
{
struct snd_sof_dev *sdev =
container_of(work, struct snd_sof_dev, probe_work);
int ret;
ret = sof_probe_continue(sdev);
if (ret < 0) {
/* errors cannot be propagated, log */
dev_err(sdev->dev, "error: %s failed err: %d\n", __func__, ret);
}
}
int snd_sof_device_probe(struct device *dev, struct snd_sof_pdata *plat_data)
{
struct snd_sof_dev *sdev;
sdev = devm_kzalloc(dev, sizeof(*sdev), GFP_KERNEL);
if (!sdev)
return -ENOMEM;
/* initialize sof device */
sdev->dev = dev;
sdev->pdata = plat_data;
sdev->first_boot = true;
sdev->fw_state = SOF_FW_BOOT_NOT_STARTED;
dev_set_drvdata(dev, sdev);
/* check all mandatory ops */
if (!sof_ops(sdev) || !sof_ops(sdev)->probe || !sof_ops(sdev)->run ||
!sof_ops(sdev)->block_read || !sof_ops(sdev)->block_write ||
!sof_ops(sdev)->send_msg || !sof_ops(sdev)->load_firmware ||
!sof_ops(sdev)->ipc_msg_data || !sof_ops(sdev)->ipc_pcm_params)
return -EINVAL;
INIT_LIST_HEAD(&sdev->pcm_list);
INIT_LIST_HEAD(&sdev->kcontrol_list);
INIT_LIST_HEAD(&sdev->widget_list);
INIT_LIST_HEAD(&sdev->dai_list);
INIT_LIST_HEAD(&sdev->route_list);
spin_lock_init(&sdev->ipc_lock);
spin_lock_init(&sdev->hw_lock);
if (IS_ENABLED(CONFIG_SND_SOC_SOF_PROBE_WORK_QUEUE))
INIT_WORK(&sdev->probe_work, sof_probe_work);
/* set default timeouts if none provided */
if (plat_data->desc->ipc_timeout == 0)
sdev->ipc_timeout = TIMEOUT_DEFAULT_IPC_MS;
else
sdev->ipc_timeout = plat_data->desc->ipc_timeout;
if (plat_data->desc->boot_timeout == 0)
sdev->boot_timeout = TIMEOUT_DEFAULT_BOOT_MS;
else
sdev->boot_timeout = plat_data->desc->boot_timeout;
if (IS_ENABLED(CONFIG_SND_SOC_SOF_PROBE_WORK_QUEUE)) {
schedule_work(&sdev->probe_work);
return 0;
}
return sof_probe_continue(sdev);
}
EXPORT_SYMBOL(snd_sof_device_probe);
int snd_sof_device_remove(struct device *dev)
{
struct snd_sof_dev *sdev = dev_get_drvdata(dev);
struct snd_sof_pdata *pdata = sdev->pdata;
if (IS_ENABLED(CONFIG_SND_SOC_SOF_PROBE_WORK_QUEUE))
cancel_work_sync(&sdev->probe_work);
if (sdev->fw_state > SOF_FW_BOOT_NOT_STARTED) {
snd_sof_fw_unload(sdev);
snd_sof_ipc_free(sdev);
snd_sof_free_debug(sdev);
snd_sof_free_trace(sdev);
}
/*
* Unregister machine driver. This will unbind the snd_card which
* will remove the component driver and unload the topology
* before freeing the snd_card.
*/
if (!IS_ERR_OR_NULL(pdata->pdev_mach))
platform_device_unregister(pdata->pdev_mach);
/*
* Unregistering the machine driver results in unloading the topology.
* Some widgets, ex: scheduler, attempt to power down the core they are
* scheduled on, when they are unloaded. Therefore, the DSP must be
* removed only after the topology has been unloaded.
*/
if (sdev->fw_state > SOF_FW_BOOT_NOT_STARTED)
snd_sof_remove(sdev);
/* release firmware */
release_firmware(pdata->fw);
pdata->fw = NULL;
return 0;
}
EXPORT_SYMBOL(snd_sof_device_remove);
MODULE_AUTHOR("Liam Girdwood");
MODULE_DESCRIPTION("Sound Open Firmware (SOF) Core");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_ALIAS("platform:sof-audio");
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