diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-09 08:26:55 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-09 08:26:55 -0700 |
commit | e57ccca1ba33e1d92cc3bbf8b6304a46948844b0 (patch) | |
tree | a988a1f7d1d3250f57761dbea365482300a7b3b2 /sound/soc/sof/trace.c | |
parent | a2d635decbfa9c1e4ae15cb05b68b2559f7f827c (diff) | |
parent | ed97c988bdc61ab6fb5d1f5f02a709844557b68f (diff) | |
download | linux-e57ccca1ba33e1d92cc3bbf8b6304a46948844b0.tar.bz2 |
Merge tag 'sound-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound updates from Takashi Iwai:
"The most significant changes at this cycle are the Sound Open Firmware
support from Intel for the common DSP framework along with its support
for Intel platforms. It's a door opened to a real "free" firmware (in
the sense of FOSS), and other parties show interests in it.
In addition to SOF, we've got a bunch of updates and fixes as usual.
Some highlights are below.
ALSA core:
- Cleanups and fixes in ALSA timer code to cover some races spotted
by syzkaller
- Cleanups and fixes in ALSA sequencer code to cover some races,
again unsurprisingly, spotted by syzkaller
- Optimize the common page allocation helper with alloc_pages_exact()
ASoC:
- Add SOF core support, as well as Intel SOF platform support
- Generic card driver improvements: support for MCLK/sample rate
ratio and pin switches
- A big set of improvements to TLV320AIC32x4 drivers
- New drivers for Freescale audio mixers, several Intel machines,
several Mediatek machines, Meson G12A, Spreadtrum compressed audio
and DMA devices
HD-audio:
- A few Realtek codec fixes for reducing pop noises
- Quirks for Chromebooks
- Workaround for faulty connection report on AMD/Nvidia HDMI
Others:
- A quirk for Focusrite Scarlett Solo USB-audio
- Add support for MOTU 8pre FireWire
- 24bit sample format support in aloop
- GUS patch format support (finally, over a decade) in native emux
synth code"
* tag 'sound-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (375 commits)
ASoC: SOF: Fix unused variable warnings
ALSA: line6: toneport: Fix broken usage of timer for delayed execution
ALSA: aica: Fix a long-time build breakage
ALSA: hda/realtek - Support low power consumption for ALC256
ASoC: stm32: i2s: update pcm hardware constraints
ASoC: codec: hdac_hdmi: no checking monitor in hw_params
ASoC: mediatek: mt6358: save PGA for mixer control
ASoC: mediatek: mt6358: save output volume for mixer controls
ASoC: mediatek: mt6358: initialize setting when ramping volume
ASoC: SOF: core: fix undefined nocodec reference
ASoC: SOF: xtensa: fix undefined references
ASoC: SOF: Propagate sof_get_ctrl_copy_params() error properly
ALSA: hdea/realtek - Headset fixup for System76 Gazelle (gaze14)
ALSA: hda/intel: add CometLake PCI IDs
ALSA: hda/realtek - Support low power consumption for ALC295
ASoC: rockchip: Fix an uninitialized variable compile warning
ASoC: SOF: Fix a compile warning with CONFIG_PCI=n
ASoC: da7219: Fix a compile warning at CONFIG_COMMON_CLK=n
ASoC: sound/soc/sof/: fix kconfig dependency warning
ASoC: stm32: spdifrx: change trace level on iec control
...
Diffstat (limited to 'sound/soc/sof/trace.c')
-rw-r--r-- | sound/soc/sof/trace.c | 297 |
1 files changed, 297 insertions, 0 deletions
diff --git a/sound/soc/sof/trace.c b/sound/soc/sof/trace.c new file mode 100644 index 000000000000..d588e4b70fad --- /dev/null +++ b/sound/soc/sof/trace.c @@ -0,0 +1,297 @@ +// 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/debugfs.h> +#include <linux/sched/signal.h> +#include "sof-priv.h" +#include "ops.h" + +static size_t sof_wait_trace_avail(struct snd_sof_dev *sdev, + loff_t pos, size_t buffer_size) +{ + wait_queue_entry_t wait; + loff_t host_offset = READ_ONCE(sdev->host_offset); + + /* + * If host offset is less than local pos, it means write pointer of + * host DMA buffer has been wrapped. We should output the trace data + * at the end of host DMA buffer at first. + */ + if (host_offset < pos) + return buffer_size - pos; + + /* If there is available trace data now, it is unnecessary to wait. */ + if (host_offset > pos) + return host_offset - pos; + + /* wait for available trace data from FW */ + init_waitqueue_entry(&wait, current); + set_current_state(TASK_INTERRUPTIBLE); + add_wait_queue(&sdev->trace_sleep, &wait); + + if (!signal_pending(current)) { + /* set timeout to max value, no error code */ + schedule_timeout(MAX_SCHEDULE_TIMEOUT); + } + remove_wait_queue(&sdev->trace_sleep, &wait); + + /* return bytes available for copy */ + host_offset = READ_ONCE(sdev->host_offset); + if (host_offset < pos) + return buffer_size - pos; + + return host_offset - pos; +} + +static ssize_t sof_dfsentry_trace_read(struct file *file, char __user *buffer, + size_t count, loff_t *ppos) +{ + struct snd_sof_dfsentry *dfse = file->private_data; + struct snd_sof_dev *sdev = dfse->sdev; + unsigned long rem; + loff_t lpos = *ppos; + size_t avail, buffer_size = dfse->size; + u64 lpos_64; + + /* make sure we know about any failures on the DSP side */ + sdev->dtrace_error = false; + + /* check pos and count */ + if (lpos < 0) + return -EINVAL; + if (!count) + return 0; + + /* check for buffer wrap and count overflow */ + lpos_64 = lpos; + lpos = do_div(lpos_64, buffer_size); + + if (count > buffer_size - lpos) /* min() not used to avoid sparse warnings */ + count = buffer_size - lpos; + + /* get available count based on current host offset */ + avail = sof_wait_trace_avail(sdev, lpos, buffer_size); + if (sdev->dtrace_error) { + dev_err(sdev->dev, "error: trace IO error\n"); + return -EIO; + } + + /* make sure count is <= avail */ + count = avail > count ? count : avail; + + /* copy available trace data to debugfs */ + rem = copy_to_user(buffer, ((u8 *)(dfse->buf) + lpos), count); + if (rem) + return -EFAULT; + + *ppos += count; + + /* move debugfs reading position */ + return count; +} + +static const struct file_operations sof_dfs_trace_fops = { + .open = simple_open, + .read = sof_dfsentry_trace_read, + .llseek = default_llseek, +}; + +static int trace_debugfs_create(struct snd_sof_dev *sdev) +{ + struct snd_sof_dfsentry *dfse; + + if (!sdev) + return -EINVAL; + + dfse = devm_kzalloc(sdev->dev, sizeof(*dfse), GFP_KERNEL); + if (!dfse) + return -ENOMEM; + + dfse->type = SOF_DFSENTRY_TYPE_BUF; + dfse->buf = sdev->dmatb.area; + dfse->size = sdev->dmatb.bytes; + dfse->sdev = sdev; + + dfse->dfsentry = debugfs_create_file("trace", 0444, sdev->debugfs_root, + dfse, &sof_dfs_trace_fops); + if (!dfse->dfsentry) { + /* can't rely on debugfs, only log error and keep going */ + dev_err(sdev->dev, + "error: cannot create debugfs entry for trace\n"); + } + + return 0; +} + +int snd_sof_init_trace_ipc(struct snd_sof_dev *sdev) +{ + struct sof_ipc_dma_trace_params params; + struct sof_ipc_reply ipc_reply; + int ret; + + if (sdev->dtrace_is_enabled || !sdev->dma_trace_pages) + return -EINVAL; + + /* set IPC parameters */ + params.hdr.size = sizeof(params); + params.hdr.cmd = SOF_IPC_GLB_TRACE_MSG | SOF_IPC_TRACE_DMA_PARAMS; + params.buffer.phy_addr = sdev->dmatp.addr; + params.buffer.size = sdev->dmatb.bytes; + params.buffer.pages = sdev->dma_trace_pages; + params.stream_tag = 0; + + sdev->host_offset = 0; + + ret = snd_sof_dma_trace_init(sdev, ¶ms.stream_tag); + if (ret < 0) { + dev_err(sdev->dev, + "error: fail in snd_sof_dma_trace_init %d\n", ret); + return ret; + } + dev_dbg(sdev->dev, "stream_tag: %d\n", params.stream_tag); + + /* send IPC to the DSP */ + ret = sof_ipc_tx_message(sdev->ipc, + params.hdr.cmd, ¶ms, sizeof(params), + &ipc_reply, sizeof(ipc_reply)); + if (ret < 0) { + dev_err(sdev->dev, + "error: can't set params for DMA for trace %d\n", ret); + goto trace_release; + } + + ret = snd_sof_dma_trace_trigger(sdev, SNDRV_PCM_TRIGGER_START); + if (ret < 0) { + dev_err(sdev->dev, + "error: snd_sof_dma_trace_trigger: start: %d\n", ret); + goto trace_release; + } + + sdev->dtrace_is_enabled = true; + + return 0; + +trace_release: + snd_sof_dma_trace_release(sdev); + return ret; +} + +int snd_sof_init_trace(struct snd_sof_dev *sdev) +{ + int ret; + + /* set false before start initialization */ + sdev->dtrace_is_enabled = false; + + /* allocate trace page table buffer */ + ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, sdev->dev, + PAGE_SIZE, &sdev->dmatp); + if (ret < 0) { + dev_err(sdev->dev, + "error: can't alloc page table for trace %d\n", ret); + return ret; + } + + /* allocate trace data buffer */ + ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV_SG, sdev->dev, + DMA_BUF_SIZE_FOR_TRACE, &sdev->dmatb); + if (ret < 0) { + dev_err(sdev->dev, + "error: can't alloc buffer for trace %d\n", ret); + goto page_err; + } + + /* create compressed page table for audio firmware */ + ret = snd_sof_create_page_table(sdev, &sdev->dmatb, sdev->dmatp.area, + sdev->dmatb.bytes); + if (ret < 0) + goto table_err; + + sdev->dma_trace_pages = ret; + dev_dbg(sdev->dev, "dma_trace_pages: %d\n", sdev->dma_trace_pages); + + if (sdev->first_boot) { + ret = trace_debugfs_create(sdev); + if (ret < 0) + goto table_err; + } + + init_waitqueue_head(&sdev->trace_sleep); + + ret = snd_sof_init_trace_ipc(sdev); + if (ret < 0) + goto table_err; + + return 0; +table_err: + sdev->dma_trace_pages = 0; + snd_dma_free_pages(&sdev->dmatb); +page_err: + snd_dma_free_pages(&sdev->dmatp); + return ret; +} +EXPORT_SYMBOL(snd_sof_init_trace); + +int snd_sof_trace_update_pos(struct snd_sof_dev *sdev, + struct sof_ipc_dma_trace_posn *posn) +{ + if (sdev->dtrace_is_enabled && sdev->host_offset != posn->host_offset) { + sdev->host_offset = posn->host_offset; + wake_up(&sdev->trace_sleep); + } + + if (posn->overflow != 0) + dev_err(sdev->dev, + "error: DSP trace buffer overflow %u bytes. Total messages %d\n", + posn->overflow, posn->messages); + + return 0; +} + +/* an error has occurred within the DSP that prevents further trace */ +void snd_sof_trace_notify_for_error(struct snd_sof_dev *sdev) +{ + if (sdev->dtrace_is_enabled) { + dev_err(sdev->dev, "error: waking up any trace sleepers\n"); + sdev->dtrace_error = true; + wake_up(&sdev->trace_sleep); + } +} +EXPORT_SYMBOL(snd_sof_trace_notify_for_error); + +void snd_sof_release_trace(struct snd_sof_dev *sdev) +{ + int ret; + + if (!sdev->dtrace_is_enabled) + return; + + ret = snd_sof_dma_trace_trigger(sdev, SNDRV_PCM_TRIGGER_STOP); + if (ret < 0) + dev_err(sdev->dev, + "error: snd_sof_dma_trace_trigger: stop: %d\n", ret); + + ret = snd_sof_dma_trace_release(sdev); + if (ret < 0) + dev_err(sdev->dev, + "error: fail in snd_sof_dma_trace_release %d\n", ret); + + sdev->dtrace_is_enabled = false; +} +EXPORT_SYMBOL(snd_sof_release_trace); + +void snd_sof_free_trace(struct snd_sof_dev *sdev) +{ + snd_sof_release_trace(sdev); + + snd_dma_free_pages(&sdev->dmatb); + snd_dma_free_pages(&sdev->dmatp); +} +EXPORT_SYMBOL(snd_sof_free_trace); |