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linux/sound/soc/sof/core.c

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// SPDX-License-Identifier: (GPL-2.0-only 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 <sound/soc.h>
#include <sound/sof.h>
#include "sof-priv.h"
#include "ops.h"
#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_PROBES)
#include "probe.h"
#endif
/* see SOF_DBG_ flags */
int sof_core_debug;
module_param_named(sof_debug, sof_core_debug, int, 0444);
MODULE_PARM_DESC(sof_debug, "SOF core debug options (0x0 all off)");
/* SOF defaults if not provided by the platform in ms */
#define TIMEOUT_DEFAULT_IPC_MS 500
#define TIMEOUT_DEFAULT_BOOT_MS 2000
/*
* 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);
/*
* 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;
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) {
ret = -ENOMEM;
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;
}
if (IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_FIRMWARE_TRACE) ||
(sof_core_debug & SOF_DBG_ENABLE_TRACE)) {
sdev->dtrace_is_supported = true;
/* 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);
}
} else {
dev_dbg(sdev->dev, "SOF firmware trace disabled\n");
}
/* 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;
}
ret = snd_sof_machine_register(sdev, plat_data);
if (ret < 0)
goto fw_trace_err;
/*
* Some platforms in SOF, ex: BYT, may not have their platform PM
* callbacks set. Increment the usage count so as to
* prevent the device from entering runtime suspend.
*/
if (!sof_ops(sdev)->runtime_suspend || !sof_ops(sdev)->runtime_resume)
pm_runtime_get_noresume(sdev->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;
/* initialize default DSP power state */
sdev->dsp_power_state.state = SOF_DSP_PM_D0;
sdev->pdata = plat_data;
sdev->first_boot = true;
sdev->fw_state = SOF_FW_BOOT_NOT_STARTED;
#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_PROBES)
sdev->extractor_stream_tag = SOF_PROBE_INVALID_NODE_ID;
#endif
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 ||
!sof_ops(sdev)->fw_ready)
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;
int ret;
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) {
ret = snd_sof_dsp_power_down_notify(sdev);
if (ret < 0)
dev_warn(dev, "error: %d failed to prepare DSP for device removal",
ret);
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.
*/
snd_sof_machine_unregister(sdev, pdata);
/*
* 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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