In rare occasions, under stress conditions or hardware malfunction, DSP firmware may fail. Software is notified about such situation with EXCEPTION_CAUGHT notification. IPC timeout is also counted as critical device failure. More often than not, driver can recover from such situations by performing full reset: killing and restarting ADSP.
Signed-off-by: Amadeusz Sławiński amadeuszx.slawinski@linux.intel.com Signed-off-by: Cezary Rojewski cezary.rojewski@intel.com --- sound/soc/intel/Kconfig | 1 + sound/soc/intel/avs/avs.h | 4 ++ sound/soc/intel/avs/ipc.c | 97 +++++++++++++++++++++++++++++++++- sound/soc/intel/avs/messages.h | 5 ++ 4 files changed, 105 insertions(+), 2 deletions(-)
diff --git a/sound/soc/intel/Kconfig b/sound/soc/intel/Kconfig index 039b45a4a799..1aaf9bdf721c 100644 --- a/sound/soc/intel/Kconfig +++ b/sound/soc/intel/Kconfig @@ -219,6 +219,7 @@ config SND_SOC_INTEL_AVS select SND_HDA_EXT_CORE select SND_HDA_DSP_LOADER select SND_INTEL_DSP_CONFIG + select WANT_DEV_COREDUMP help Enable support for Intel(R) cAVS 1.5 platforms with DSP capabilities. This includes Skylake, Kabylake, Amberlake and diff --git a/sound/soc/intel/avs/avs.h b/sound/soc/intel/avs/avs.h index e628f78d1864..9096f6c3d598 100644 --- a/sound/soc/intel/avs/avs.h +++ b/sound/soc/intel/avs/avs.h @@ -42,6 +42,7 @@ struct avs_dsp_ops { int (* const load_basefw)(struct avs_dev *, struct firmware *); int (* const load_lib)(struct avs_dev *, struct firmware *, u32); int (* const transfer_mods)(struct avs_dev *, bool, struct avs_module_entry *, u32); + int (* const coredump)(struct avs_dev *, union avs_notify_msg *); };
#define avs_dsp_op(adev, op, ...) \ @@ -164,12 +165,15 @@ struct avs_ipc { struct avs_ipc_msg rx; u32 default_timeout_ms; bool ready; + atomic_t recovering;
bool rx_completed; spinlock_t rx_lock; struct mutex msg_mutex; struct completion done_completion; struct completion busy_completion; + + struct work_struct recovery_work; };
#define AVS_EIPC EREMOTEIO diff --git a/sound/soc/intel/avs/ipc.c b/sound/soc/intel/avs/ipc.c index 68aaf01edbf2..98cdc05071fb 100644 --- a/sound/soc/intel/avs/ipc.c +++ b/sound/soc/intel/avs/ipc.c @@ -14,6 +14,89 @@
#define AVS_IPC_TIMEOUT_MS 300
+static void avs_dsp_recovery(struct avs_dev *adev) +{ + struct avs_soc_component *acomp; + unsigned int core_mask; + int ret; + + mutex_lock(&adev->comp_list_mutex); + /* disconnect all running streams */ + list_for_each_entry(acomp, &adev->comp_list, node) { + struct snd_soc_pcm_runtime *rtd; + struct snd_soc_card *card; + + card = acomp->base.card; + if (!card) + continue; + + for_each_card_rtds(card, rtd) { + struct snd_pcm *pcm; + int dir; + + pcm = rtd->pcm; + if (!pcm || rtd->dai_link->no_pcm) + continue; + + for_each_pcm_streams(dir) { + struct snd_pcm_substream *substream; + + substream = pcm->streams[dir].substream; + if (!substream || !substream->runtime) + continue; + + snd_pcm_stop(substream, SNDRV_PCM_STATE_DISCONNECTED); + } + } + } + mutex_unlock(&adev->comp_list_mutex); + + /* forcibly shutdown all cores */ + core_mask = GENMASK(adev->hw_cfg.dsp_cores - 1, 0); + avs_dsp_core_disable(adev, core_mask); + + /* attempt dsp reboot */ + ret = avs_dsp_boot_firmware(adev, true); + if (ret < 0) + dev_err(adev->dev, "dsp reboot failed: %d\n", ret); + + pm_runtime_mark_last_busy(adev->dev); + pm_runtime_enable(adev->dev); + pm_request_autosuspend(adev->dev); + + atomic_set(&adev->ipc->recovering, 0); +} + +static void avs_dsp_recovery_work(struct work_struct *work) +{ + struct avs_ipc *ipc = container_of(work, struct avs_ipc, recovery_work); + + avs_dsp_recovery(to_avs_dev(ipc->dev)); +} + +static void avs_dsp_exception_caught(struct avs_dev *adev, union avs_notify_msg *msg) +{ + struct avs_ipc *ipc = adev->ipc; + + /* Account for the double-exception case. */ + ipc->ready = false; + + if (!atomic_add_unless(&ipc->recovering, 1, 1)) { + dev_err(adev->dev, "dsp recovery is already in progress\n"); + return; + } + + dev_crit(adev->dev, "communication severed, rebooting dsp..\n"); + + /* Re-enabled on recovery completion. */ + pm_runtime_disable(adev->dev); + + /* Process received notification. */ + avs_dsp_op(adev, coredump, msg); + + schedule_work(&ipc->recovery_work); +} + static void avs_dsp_receive_rx(struct avs_dev *adev, u64 header) { struct avs_ipc *ipc = adev->ipc; @@ -57,6 +140,9 @@ static void avs_dsp_process_notification(struct avs_dev *adev, u64 header) data_size = sizeof(struct avs_notify_res_data); break;
+ case AVS_NOTIFY_EXCEPTION_CAUGHT: + break; + case AVS_NOTIFY_MODULE_EVENT: /* To know the total payload size, header needs to be read first. */ memcpy_fromio(&mod_data, avs_uplink_addr(adev), sizeof(mod_data)); @@ -84,6 +170,10 @@ static void avs_dsp_process_notification(struct avs_dev *adev, u64 header) complete(&adev->fw_ready); break;
+ case AVS_NOTIFY_EXCEPTION_CAUGHT: + avs_dsp_exception_caught(adev, &msg); + break; + default: break; } @@ -278,9 +368,10 @@ static int avs_dsp_do_send_msg(struct avs_dev *adev, struct avs_ipc_msg *request ret = avs_ipc_wait_busy_completion(ipc, timeout); if (ret) { if (ret == -ETIMEDOUT) { - dev_crit(adev->dev, "communication severed: %d, rebooting dsp..\n", ret); + union avs_notify_msg msg = AVS_NOTIFICATION(EXCEPTION_CAUGHT);
- avs_ipc_block(ipc); + /* Same treatment as on exception, just stack_dump=0. */ + avs_dsp_exception_caught(adev, &msg); } goto exit; } @@ -368,6 +459,7 @@ int avs_ipc_init(struct avs_ipc *ipc, struct device *dev) ipc->dev = dev; ipc->ready = false; ipc->default_timeout_ms = AVS_IPC_TIMEOUT_MS; + INIT_WORK(&ipc->recovery_work, avs_dsp_recovery_work); init_completion(&ipc->done_completion); init_completion(&ipc->busy_completion); spin_lock_init(&ipc->rx_lock); @@ -379,4 +471,5 @@ int avs_ipc_init(struct avs_ipc *ipc, struct device *dev) void avs_ipc_block(struct avs_ipc *ipc) { ipc->ready = false; + cancel_work_sync(&ipc->recovery_work); } diff --git a/sound/soc/intel/avs/messages.h b/sound/soc/intel/avs/messages.h index 0395dd7150eb..94875a153124 100644 --- a/sound/soc/intel/avs/messages.h +++ b/sound/soc/intel/avs/messages.h @@ -187,6 +187,7 @@ enum avs_notify_msg_type { AVS_NOTIFY_PHRASE_DETECTED = 4, AVS_NOTIFY_RESOURCE_EVENT = 5, AVS_NOTIFY_FW_READY = 8, + AVS_NOTIFY_EXCEPTION_CAUGHT = 10, AVS_NOTIFY_MODULE_EVENT = 12, };
@@ -205,6 +206,10 @@ union avs_notify_msg { }; union { u32 val; + struct { + u32 core_id:2; + u32 stack_dump_size:16; + } coredump; } ext; }; } __packed;