[PATCH v2 00/16] ASoC: Intel: avs: Data probing and fw logging

[PATCH v2 00/16] ASoC: Intel: avs: Data probing and fw logging

[Cezary Rojewski]

The patchset focuses on debug functionality for the avs-driver.
Two major blocks are covered here: data probing and AudioDSP firmware
logging. Both are configured and controlled through debugfs.

Data probing is a AudioDSP debug functionality which allows for
gathering the actual data that is being routed to or from a module.
Helps in debugging its processing capabilities - navigate to a specific
module which may have caused a glitch within a pipeline (set of modules
bound together).

First few allow for assigning compress stream to a HDAudio stream, what
is currently limited to pcm substreams only. These patches were already
present on this list and reviewed in the past [1].

The next few tidy existing debug-related code up so it's ready for
addition of new functionalities and make it clear which part of the avs
is debug related and which is not. These also simplify the existing
locking around the trace fifo.

Afterward, debug-related IPCs are defined along with stub soc-component
and compress DAI operations. Not much is done there as it's not a
standard PCM streaming scenario. Most code found in compress operations
is inherited from the HOST side of HDAudio streaming found in pcm.c
file of the driver.

Finally, a debugfs file operations are defined. These facilitate
connecting to DSP modules from which the data shall be gathered as well
as control and configuration of firmware logging. Additionally, entries
are added to allow for dumping snapshots of key memory windows.


Changes in v2:
- reordered sign offs in patch 03 as reported by Takashi
- fixed issue reported by ikp - unintilialized 'runtime' variable in
  patch 03
- added missing module_get_upon_open in component driver declaration

[1]: https://lore.kernel.org/alsa-devel/20200124190413.18154-1-cezary.rojewski@intel.com/

Cezary Rojewski (16):
  ALSA: hda: Allow for compress stream to hdac_ext_stream assignment
  ALSA: hda: Prepare for compress stream support
  ALSA: hda: Interrupt servicing and BDL setup for compress streams
  ASoC: Intel: avs: Introduce avs_log_buffer_status_locked()
  ASoC: Intel: avs: Drop fifo_lock
  ASoC: Intel: avs: Introduce debug-context aware helpers
  ASoC: Intel: avs: Make enable_logs() dependent on DEBUG_FS
  ASoC: Intel: avs: Drop usage of debug members in non-debug code
  ASoC: Intel: avs: Add data probing requests
  ASoC: Intel: avs: Probe compress operations
  ASoC: Intel: avs: Data probing soc-component
  ASoC: Intel: avs: Add probe machine board
  ASoC: Intel: avs: Probing and firmware tracing over debugfs
  ASoC: Intel: avs: Gather remaining logs on strace_release()
  ASoC: Intel: avs: Allow for dumping FW_REGS area
  ASoC: Intel: avs: Allow for dumping debug window snapshot

 include/sound/hdaudio_ext.h           |   2 +
 sound/hda/ext/hdac_ext_stream.c       |  41 +++
 sound/hda/hdac_controller.c           |   4 +-
 sound/hda/hdac_stream.c               |  51 +--
 sound/soc/intel/Kconfig               |   1 +
 sound/soc/intel/avs/Makefile          |   4 +
 sound/soc/intel/avs/apl.c             |  24 +-
 sound/soc/intel/avs/avs.h             |  80 ++++-
 sound/soc/intel/avs/board_selection.c |  33 ++
 sound/soc/intel/avs/boards/Kconfig    |   8 +
 sound/soc/intel/avs/boards/Makefile   |   2 +
 sound/soc/intel/avs/boards/probe.c    |  64 ++++
 sound/soc/intel/avs/core.c            |   2 +
 sound/soc/intel/avs/debugfs.c         | 436 ++++++++++++++++++++++++++
 sound/soc/intel/avs/ipc.c             |   2 +-
 sound/soc/intel/avs/messages.c        | 104 +++++-
 sound/soc/intel/avs/messages.h        |  53 ++++
 sound/soc/intel/avs/pcm.c             |   6 +-
 sound/soc/intel/avs/probes.c          | 313 ++++++++++++++++++
 sound/soc/intel/avs/registers.h       |   3 +-
 sound/soc/intel/avs/skl.c             |  17 +-
 sound/soc/intel/avs/utils.c           |  22 --
 22 files changed, 1172 insertions(+), 100 deletions(-)
 create mode 100644 sound/soc/intel/avs/boards/probe.c
 create mode 100644 sound/soc/intel/avs/debugfs.c
 create mode 100644 sound/soc/intel/avs/probes.c

-- 
2.25.1

[PATCH v2 01/16] ALSA: hda: Allow for compress stream to hdac_ext_stream assignment

[Cezary Rojewski]

Currently only PCM streams can enlist hdac_stream for their data
transfer. Add cstream field to hdac_ext_stream to expose possibility of
compress stream assignment in place of PCM one.
Limited to HOST-type only as there no other users on the horizon.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
 include/sound/hdaudio_ext.h     |  2 ++
 sound/hda/ext/hdac_ext_stream.c | 41 +++++++++++++++++++++++++++++++++
 2 files changed, 43 insertions(+)

diff --git a/include/sound/hdaudio_ext.h b/include/sound/hdaudio_ext.h
index 68ab89211de2..511211f4a2b6 100644
--- a/include/sound/hdaudio_ext.h
+++ b/include/sound/hdaudio_ext.h
@@ -75,6 +75,8 @@ struct hdac_ext_stream *snd_hdac_ext_stream_assign(struct hdac_bus *bus,
 					   struct snd_pcm_substream *substream,
 					   int type);
 void snd_hdac_ext_stream_release(struct hdac_ext_stream *hext_stream, int type);
+struct hdac_ext_stream *snd_hdac_ext_cstream_assign(struct hdac_bus *bus,
+						    struct snd_compr_stream *cstream);
 void snd_hdac_ext_stream_decouple_locked(struct hdac_bus *bus,
 					 struct hdac_ext_stream *hext_stream, bool decouple);
 void snd_hdac_ext_stream_decouple(struct hdac_bus *bus,
diff --git a/sound/hda/ext/hdac_ext_stream.c b/sound/hda/ext/hdac_ext_stream.c
index 2a071a09224d..11b7119cc47e 100644
--- a/sound/hda/ext/hdac_ext_stream.c
+++ b/sound/hda/ext/hdac_ext_stream.c
@@ -14,6 +14,7 @@
 #include <sound/pcm.h>
 #include <sound/hda_register.h>
 #include <sound/hdaudio_ext.h>
+#include <sound/compress_driver.h>
 
 /**
  * snd_hdac_ext_stream_init - initialize each stream (aka device)
@@ -367,3 +368,43 @@ void snd_hdac_ext_stream_release(struct hdac_ext_stream *hext_stream, int type)
 
 }
 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_release);
+
+/**
+ * snd_hdac_ext_cstream_assign - assign a host stream for compress
+ * @bus: HD-audio core bus
+ * @cstream: Compress stream to assign
+ *
+ * Assign an unused host stream for the given compress stream.
+ * If no stream is free, NULL is returned. Stream is decoupled
+ * before assignment.
+ */
+struct hdac_ext_stream *snd_hdac_ext_cstream_assign(struct hdac_bus *bus,
+						    struct snd_compr_stream *cstream)
+{
+	struct hdac_ext_stream *res = NULL;
+	struct hdac_stream *hstream;
+
+	spin_lock_irq(&bus->reg_lock);
+	list_for_each_entry(hstream, &bus->stream_list, list) {
+		struct hdac_ext_stream *hext_stream = stream_to_hdac_ext_stream(hstream);
+
+		if (hstream->direction != cstream->direction)
+			continue;
+
+		if (!hstream->opened) {
+			res = hext_stream;
+			break;
+		}
+	}
+
+	if (res) {
+		snd_hdac_ext_stream_decouple_locked(bus, res, true);
+		res->hstream.opened = 1;
+		res->hstream.running = 0;
+		res->hstream.cstream = cstream;
+	}
+	spin_unlock_irq(&bus->reg_lock);
+
+	return res;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_cstream_assign);
-- 
2.25.1

[PATCH v2 02/16] ALSA: hda: Prepare for compress stream support

[Cezary Rojewski]

Before introducing compress specific changes, adjust BDL and parameters
setup functions so these are not tightly coupled with PCM streams.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
 sound/hda/hdac_stream.c | 32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/sound/hda/hdac_stream.c b/sound/hda/hdac_stream.c
index 3b250ee7f6a7..8a12c6347914 100644
--- a/sound/hda/hdac_stream.c
+++ b/sound/hda/hdac_stream.c
@@ -487,11 +487,15 @@ int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev)
 {
 	struct hdac_bus *bus = azx_dev->bus;
 	struct snd_pcm_substream *substream = azx_dev->substream;
-	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_pcm_runtime *runtime;
+	struct snd_dma_buffer *dmab;
 	__le32 *bdl;
 	int i, ofs, periods, period_bytes;
 	int pos_adj, pos_align;
 
+	runtime = substream->runtime;
+	dmab = snd_pcm_get_dma_buf(substream);
+
 	/* reset BDL address */
 	snd_hdac_stream_writel(azx_dev, SD_BDLPL, 0);
 	snd_hdac_stream_writel(azx_dev, SD_BDLPU, 0);
@@ -505,7 +509,7 @@ int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev)
 	azx_dev->frags = 0;
 
 	pos_adj = bus->bdl_pos_adj;
-	if (!azx_dev->no_period_wakeup && pos_adj > 0) {
+	if (runtime && !azx_dev->no_period_wakeup && pos_adj > 0) {
 		pos_align = pos_adj;
 		pos_adj = DIV_ROUND_UP(pos_adj * runtime->rate, 48000);
 		if (!pos_adj)
@@ -518,8 +522,7 @@ int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev)
 				 pos_adj);
 			pos_adj = 0;
 		} else {
-			ofs = setup_bdle(bus, snd_pcm_get_dma_buf(substream),
-					 azx_dev,
+			ofs = setup_bdle(bus, dmab, azx_dev,
 					 &bdl, ofs, pos_adj, true);
 			if (ofs < 0)
 				goto error;
@@ -529,13 +532,11 @@ int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev)
 
 	for (i = 0; i < periods; i++) {
 		if (i == periods - 1 && pos_adj)
-			ofs = setup_bdle(bus, snd_pcm_get_dma_buf(substream),
-					 azx_dev, &bdl, ofs,
-					 period_bytes - pos_adj, 0);
+			ofs = setup_bdle(bus, dmab, azx_dev,
+					 &bdl, ofs, period_bytes - pos_adj, 0);
 		else
-			ofs = setup_bdle(bus, snd_pcm_get_dma_buf(substream),
-					 azx_dev, &bdl, ofs,
-					 period_bytes,
+			ofs = setup_bdle(bus, dmab, azx_dev,
+					 &bdl, ofs, period_bytes,
 					 !azx_dev->no_period_wakeup);
 		if (ofs < 0)
 			goto error;
@@ -560,26 +561,25 @@ EXPORT_SYMBOL_GPL(snd_hdac_stream_setup_periods);
 int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
 				 unsigned int format_val)
 {
-
-	unsigned int bufsize, period_bytes;
 	struct snd_pcm_substream *substream = azx_dev->substream;
-	struct snd_pcm_runtime *runtime;
+	unsigned int bufsize, period_bytes;
+	unsigned int no_period_wakeup;
 	int err;
 
 	if (!substream)
 		return -EINVAL;
-	runtime = substream->runtime;
 	bufsize = snd_pcm_lib_buffer_bytes(substream);
 	period_bytes = snd_pcm_lib_period_bytes(substream);
+	no_period_wakeup = substream->runtime->no_period_wakeup;
 
 	if (bufsize != azx_dev->bufsize ||
 	    period_bytes != azx_dev->period_bytes ||
 	    format_val != azx_dev->format_val ||
-	    runtime->no_period_wakeup != azx_dev->no_period_wakeup) {
+	    no_period_wakeup != azx_dev->no_period_wakeup) {
 		azx_dev->bufsize = bufsize;
 		azx_dev->period_bytes = period_bytes;
 		azx_dev->format_val = format_val;
-		azx_dev->no_period_wakeup = runtime->no_period_wakeup;
+		azx_dev->no_period_wakeup = no_period_wakeup;
 		err = snd_hdac_stream_setup_periods(azx_dev);
 		if (err < 0)
 			return err;
-- 
2.25.1

[PATCH v2 03/16] ALSA: hda: Interrupt servicing and BDL setup for compress streams

[Cezary Rojewski]

Account for compress streams when receiving and servicing buffer
completed interrupts. In case of compress stream enlisting hdac_stream
for data transfer, setup BDL entries much like it is the case for PCM
streams.

Signed-off-by: Divya Prakash <divya1.prakash@intel.com>
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
 sound/hda/hdac_controller.c |  4 ++--
 sound/hda/hdac_stream.c     | 27 ++++++++++++++++++++-------
 2 files changed, 22 insertions(+), 9 deletions(-)

diff --git a/sound/hda/hdac_controller.c b/sound/hda/hdac_controller.c
index 9a60bfdb39ba..3c7af6558249 100644
--- a/sound/hda/hdac_controller.c
+++ b/sound/hda/hdac_controller.c
@@ -578,8 +578,8 @@ int snd_hdac_bus_handle_stream_irq(struct hdac_bus *bus, unsigned int status,
 			sd_status = snd_hdac_stream_readb(azx_dev, SD_STS);
 			snd_hdac_stream_writeb(azx_dev, SD_STS, SD_INT_MASK);
 			handled |= 1 << azx_dev->index;
-			if (!azx_dev->substream || !azx_dev->running ||
-			    !(sd_status & SD_INT_COMPLETE))
+			if ((!azx_dev->substream && !azx_dev->cstream) ||
+			    !azx_dev->running || !(sd_status & SD_INT_COMPLETE))
 				continue;
 			if (ack)
 				ack(bus, azx_dev);
diff --git a/sound/hda/hdac_stream.c b/sound/hda/hdac_stream.c
index 8a12c6347914..8f625402505f 100644
--- a/sound/hda/hdac_stream.c
+++ b/sound/hda/hdac_stream.c
@@ -7,6 +7,7 @@
 #include <linux/delay.h>
 #include <linux/export.h>
 #include <linux/clocksource.h>
+#include <sound/compress_driver.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/hdaudio.h>
@@ -487,14 +488,19 @@ int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev)
 {
 	struct hdac_bus *bus = azx_dev->bus;
 	struct snd_pcm_substream *substream = azx_dev->substream;
-	struct snd_pcm_runtime *runtime;
+	struct snd_compr_stream *cstream = azx_dev->cstream;
+	struct snd_pcm_runtime *runtime = NULL;
 	struct snd_dma_buffer *dmab;
 	__le32 *bdl;
 	int i, ofs, periods, period_bytes;
 	int pos_adj, pos_align;
 
-	runtime = substream->runtime;
-	dmab = snd_pcm_get_dma_buf(substream);
+	if (substream) {
+		runtime = substream->runtime;
+		dmab = snd_pcm_get_dma_buf(substream);
+	} else if (cstream) {
+		dmab = snd_pcm_get_dma_buf(cstream);
+	}
 
 	/* reset BDL address */
 	snd_hdac_stream_writel(azx_dev, SD_BDLPL, 0);
@@ -562,15 +568,22 @@ int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
 				 unsigned int format_val)
 {
 	struct snd_pcm_substream *substream = azx_dev->substream;
+	struct snd_compr_stream *cstream = azx_dev->cstream;
 	unsigned int bufsize, period_bytes;
 	unsigned int no_period_wakeup;
 	int err;
 
-	if (!substream)
+	if (substream) {
+		bufsize = snd_pcm_lib_buffer_bytes(substream);
+		period_bytes = snd_pcm_lib_period_bytes(substream);
+		no_period_wakeup = substream->runtime->no_period_wakeup;
+	} else if (cstream) {
+		bufsize = cstream->runtime->buffer_size;
+		period_bytes = cstream->runtime->fragment_size;
+		no_period_wakeup = 0;
+	} else {
 		return -EINVAL;
-	bufsize = snd_pcm_lib_buffer_bytes(substream);
-	period_bytes = snd_pcm_lib_period_bytes(substream);
-	no_period_wakeup = substream->runtime->no_period_wakeup;
+	}
 
 	if (bufsize != azx_dev->bufsize ||
 	    period_bytes != azx_dev->period_bytes ||
-- 
2.25.1

[PATCH v2 04/16] ASoC: Intel: avs: Introduce avs_log_buffer_status_locked()

[Cezary Rojewski]

Simplify locking of firmware log gathering by providing single location
for such purpose.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
---
 sound/soc/intel/avs/apl.c |  5 +----
 sound/soc/intel/avs/avs.h | 12 ++++++++++++
 sound/soc/intel/avs/ipc.c |  2 +-
 sound/soc/intel/avs/skl.c |  7 +------
 4 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/sound/soc/intel/avs/apl.c b/sound/soc/intel/avs/apl.c
index 7c8ce98eda9d..821d5a9ad25f 100644
--- a/sound/soc/intel/avs/apl.c
+++ b/sound/soc/intel/avs/apl.c
@@ -50,7 +50,6 @@ static int apl_enable_logs(struct avs_dev *adev, enum avs_log_enable enable, u32
 static int apl_log_buffer_status(struct avs_dev *adev, union avs_notify_msg *msg)
 {
 	struct apl_log_buffer_layout layout;
-	unsigned long flags;
 	void __iomem *addr, *buf;
 
 	addr = avs_log_buffer_addr(adev, msg->log.core);
@@ -59,7 +58,6 @@ static int apl_log_buffer_status(struct avs_dev *adev, union avs_notify_msg *msg
 
 	memcpy_fromio(&layout, addr, sizeof(layout));
 
-	spin_lock_irqsave(&adev->dbg.trace_lock, flags);
 	if (!kfifo_initialized(&adev->dbg.trace_fifo))
 		/* consume the logs regardless of consumer presence */
 		goto update_read_ptr;
@@ -78,7 +76,6 @@ static int apl_log_buffer_status(struct avs_dev *adev, union avs_notify_msg *msg
 	wake_up(&adev->dbg.trace_waitq);
 
 update_read_ptr:
-	spin_unlock_irqrestore(&adev->dbg.trace_lock, flags);
 	writel(layout.write_ptr, addr);
 	return 0;
 }
@@ -140,7 +137,7 @@ static int apl_coredump(struct avs_dev *adev, union avs_notify_msg *msg)
 		 * gathered before dumping stack
 		 */
 		lbs_msg.log.core = msg->ext.coredump.core_id;
-		avs_dsp_op(adev, log_buffer_status, &lbs_msg);
+		avs_log_buffer_status_locked(adev, &lbs_msg);
 	}
 
 	pos = dump + AVS_FW_REGS_SIZE;
diff --git a/sound/soc/intel/avs/avs.h b/sound/soc/intel/avs/avs.h
index 8d05b27608fe..1c89af6240d2 100644
--- a/sound/soc/intel/avs/avs.h
+++ b/sound/soc/intel/avs/avs.h
@@ -344,6 +344,18 @@ unsigned int __kfifo_fromio_locked(struct kfifo *fifo, const void __iomem *src,
 			 (avs_sram_addr(adev, AVS_DEBUG_WINDOW) + __offset); \
 })
 
+static inline int avs_log_buffer_status_locked(struct avs_dev *adev, union avs_notify_msg *msg)
+{
+	unsigned long flags;
+	int ret;
+
+	spin_lock_irqsave(&adev->dbg.trace_lock, flags);
+	ret = avs_dsp_op(adev, log_buffer_status, msg);
+	spin_unlock_irqrestore(&adev->dbg.trace_lock, flags);
+
+	return ret;
+}
+
 struct apl_log_buffer_layout {
 	u32 read_ptr;
 	u32 write_ptr;
diff --git a/sound/soc/intel/avs/ipc.c b/sound/soc/intel/avs/ipc.c
index af8a260093f4..bdf013c3dd12 100644
--- a/sound/soc/intel/avs/ipc.c
+++ b/sound/soc/intel/avs/ipc.c
@@ -266,7 +266,7 @@ static void avs_dsp_process_notification(struct avs_dev *adev, u64 header)
 		break;
 
 	case AVS_NOTIFY_LOG_BUFFER_STATUS:
-		avs_dsp_op(adev, log_buffer_status, &msg);
+		avs_log_buffer_status_locked(adev, &msg);
 		break;
 
 	case AVS_NOTIFY_EXCEPTION_CAUGHT:
diff --git a/sound/soc/intel/avs/skl.c b/sound/soc/intel/avs/skl.c
index dc98b5cf900f..ff690e99d960 100644
--- a/sound/soc/intel/avs/skl.c
+++ b/sound/soc/intel/avs/skl.c
@@ -55,15 +55,11 @@ int skl_log_buffer_offset(struct avs_dev *adev, u32 core)
 static int
 skl_log_buffer_status(struct avs_dev *adev, union avs_notify_msg *msg)
 {
-	unsigned long flags;
 	void __iomem *buf;
 	u16 size, write, offset;
 
-	spin_lock_irqsave(&adev->dbg.trace_lock, flags);
-	if (!kfifo_initialized(&adev->dbg.trace_fifo)) {
-		spin_unlock_irqrestore(&adev->dbg.trace_lock, flags);
+	if (!kfifo_initialized(&adev->dbg.trace_fifo))
 		return 0;
-	}
 
 	size = avs_log_buffer_size(adev) / 2;
 	write = readl(avs_sram_addr(adev, AVS_FW_REGS_WINDOW) + FW_REGS_DBG_LOG_WP(msg->log.core));
@@ -74,7 +70,6 @@ skl_log_buffer_status(struct avs_dev *adev, union avs_notify_msg *msg)
 	buf = avs_log_buffer_addr(adev, msg->log.core) + offset;
 	__kfifo_fromio_locked(&adev->dbg.trace_fifo, buf, size, &adev->dbg.fifo_lock);
 	wake_up(&adev->dbg.trace_waitq);
-	spin_unlock_irqrestore(&adev->dbg.trace_lock, flags);
 
 	return 0;
 }
-- 
2.25.1

[PATCH v2 05/16] ASoC: Intel: avs: Drop fifo_lock

[Cezary Rojewski]

Log gathering is already locked, thanks to ->trace_lock.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
---
 sound/soc/intel/avs/apl.c   | 9 ++++-----
 sound/soc/intel/avs/avs.h   | 4 +---
 sound/soc/intel/avs/skl.c   | 2 +-
 sound/soc/intel/avs/utils.c | 6 +-----
 4 files changed, 7 insertions(+), 14 deletions(-)

diff --git a/sound/soc/intel/avs/apl.c b/sound/soc/intel/avs/apl.c
index 821d5a9ad25f..66672ffd95df 100644
--- a/sound/soc/intel/avs/apl.c
+++ b/sound/soc/intel/avs/apl.c
@@ -65,13 +65,12 @@ static int apl_log_buffer_status(struct avs_dev *adev, union avs_notify_msg *msg
 	buf = apl_log_payload_addr(addr);
 
 	if (layout.read_ptr > layout.write_ptr) {
-		__kfifo_fromio_locked(&adev->dbg.trace_fifo, buf + layout.read_ptr,
-				      apl_log_payload_size(adev) - layout.read_ptr,
-				      &adev->dbg.fifo_lock);
+		__kfifo_fromio(&adev->dbg.trace_fifo, buf + layout.read_ptr,
+			       apl_log_payload_size(adev) - layout.read_ptr);
 		layout.read_ptr = 0;
 	}
-	__kfifo_fromio_locked(&adev->dbg.trace_fifo, buf + layout.read_ptr,
-			      layout.write_ptr - layout.read_ptr, &adev->dbg.fifo_lock);
+	__kfifo_fromio(&adev->dbg.trace_fifo, buf + layout.read_ptr,
+		       layout.write_ptr - layout.read_ptr);
 
 	wake_up(&adev->dbg.trace_waitq);
 
diff --git a/sound/soc/intel/avs/avs.h b/sound/soc/intel/avs/avs.h
index 1c89af6240d2..957151ecf39a 100644
--- a/sound/soc/intel/avs/avs.h
+++ b/sound/soc/intel/avs/avs.h
@@ -95,7 +95,6 @@ struct avs_fw_entry {
 
 struct avs_debug {
 	struct kfifo trace_fifo;
-	spinlock_t fifo_lock;	/* serialize I/O for trace_fifo */
 	spinlock_t trace_lock;	/* serialize debug window I/O between each LOG_BUFFER_STATUS */
 	wait_queue_head_t trace_waitq;
 	u32 aging_timer_period;
@@ -331,8 +330,7 @@ void avs_unregister_all_boards(struct avs_dev *adev);
 
 /* Firmware tracing helpers */
 
-unsigned int __kfifo_fromio_locked(struct kfifo *fifo, const void __iomem *src, unsigned int len,
-				   spinlock_t *lock);
+unsigned int __kfifo_fromio(struct kfifo *fifo, const void __iomem *src, unsigned int len);
 
 #define avs_log_buffer_size(adev) \
 	((adev)->fw_cfg.trace_log_bytes / (adev)->hw_cfg.dsp_cores)
diff --git a/sound/soc/intel/avs/skl.c b/sound/soc/intel/avs/skl.c
index ff690e99d960..936cd44eb73e 100644
--- a/sound/soc/intel/avs/skl.c
+++ b/sound/soc/intel/avs/skl.c
@@ -68,7 +68,7 @@ skl_log_buffer_status(struct avs_dev *adev, union avs_notify_msg *msg)
 
 	/* Address is guaranteed to exist in SRAM2. */
 	buf = avs_log_buffer_addr(adev, msg->log.core) + offset;
-	__kfifo_fromio_locked(&adev->dbg.trace_fifo, buf, size, &adev->dbg.fifo_lock);
+	__kfifo_fromio(&adev->dbg.trace_fifo, buf, size);
 	wake_up(&adev->dbg.trace_waitq);
 
 	return 0;
diff --git a/sound/soc/intel/avs/utils.c b/sound/soc/intel/avs/utils.c
index 13611dee9787..75ad434d7dfb 100644
--- a/sound/soc/intel/avs/utils.c
+++ b/sound/soc/intel/avs/utils.c
@@ -301,14 +301,11 @@ void avs_release_firmwares(struct avs_dev *adev)
 	}
 }
 
-unsigned int __kfifo_fromio_locked(struct kfifo *fifo, const void __iomem *src, unsigned int len,
-				   spinlock_t *lock)
+unsigned int __kfifo_fromio(struct kfifo *fifo, const void __iomem *src, unsigned int len)
 {
 	struct __kfifo *__fifo = &fifo->kfifo;
-	unsigned long flags;
 	unsigned int l, off;
 
-	spin_lock_irqsave(lock, flags);
 	len = min(len, kfifo_avail(fifo));
 	off = __fifo->in & __fifo->mask;
 	l = min(len, kfifo_size(fifo) - off);
@@ -318,7 +315,6 @@ unsigned int __kfifo_fromio_locked(struct kfifo *fifo, const void __iomem *src,
 	/* Make sure data copied from SRAM is visible to all CPUs. */
 	smp_mb();
 	__fifo->in += len;
-	spin_unlock_irqrestore(lock, flags);
 
 	return len;
 }
-- 
2.25.1

[PATCH v2 06/16] ASoC: Intel: avs: Introduce debug-context aware helpers

[Cezary Rojewski]

Debug-related fields and log-dumping are useful when debugfs is enabled.
Define them under CONFIG_DEBUG_FS and provide stubs when the config is
disabled so that the code that makes use of these needs not to be
complicated unnecessarily.

Members that are duplicated by this patch will be removed by the follow
up changes.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
---
 sound/soc/intel/avs/Makefile  |  4 ++++
 sound/soc/intel/avs/avs.h     | 29 +++++++++++++++++++++++++++++
 sound/soc/intel/avs/debugfs.c | 28 ++++++++++++++++++++++++++++
 3 files changed, 61 insertions(+)
 create mode 100644 sound/soc/intel/avs/debugfs.c

diff --git a/sound/soc/intel/avs/Makefile b/sound/soc/intel/avs/Makefile
index 919212825f21..a211a0b7b4a8 100644
--- a/sound/soc/intel/avs/Makefile
+++ b/sound/soc/intel/avs/Makefile
@@ -9,6 +9,10 @@ snd-soc-avs-objs += trace.o
 # tell define_trace.h where to find the trace header
 CFLAGS_trace.o := -I$(src)
 
+ifneq ($(CONFIG_DEBUG_FS),)
+snd-soc-avs-objs += debugfs.o
+endif
+
 obj-$(CONFIG_SND_SOC_INTEL_AVS) += snd-soc-avs.o
 
 # Machine support
diff --git a/sound/soc/intel/avs/avs.h b/sound/soc/intel/avs/avs.h
index 957151ecf39a..3687d03f87d4 100644
--- a/sound/soc/intel/avs/avs.h
+++ b/sound/soc/intel/avs/avs.h
@@ -9,6 +9,7 @@
 #ifndef __SOUND_SOC_INTEL_AVS_H
 #define __SOUND_SOC_INTEL_AVS_H
 
+#include <linux/debugfs.h>
 #include <linux/device.h>
 #include <linux/firmware.h>
 #include <linux/kfifo.h>
@@ -146,6 +147,14 @@ struct avs_dev {
 	struct mutex path_mutex;
 
 	struct avs_debug dbg;
+	spinlock_t trace_lock;	/* serialize debug window I/O between each LOG_BUFFER_STATUS */
+#ifdef CONFIG_DEBUG_FS
+	struct kfifo trace_fifo;
+	wait_queue_head_t trace_waitq;
+	u32 aging_timer_period;
+	u32 fifo_full_timer_period;
+	u32 logged_resources;	/* context dependent: core or library */
+#endif
 };
 
 /* from hda_bus to avs_dev */
@@ -366,4 +375,24 @@ struct apl_log_buffer_layout {
 #define apl_log_payload_addr(addr) \
 	(addr + sizeof(struct apl_log_buffer_layout))
 
+#ifdef CONFIG_DEBUG_FS
+bool avs_logging_fw(struct avs_dev *adev);
+void avs_dump_fw_log(struct avs_dev *adev, const void __iomem *src, unsigned int len);
+void avs_dump_fw_log_wakeup(struct avs_dev *adev, const void __iomem *src, unsigned int len);
+#else
+static inline bool avs_logging_fw(struct avs_dev *adev)
+{
+	return false;
+}
+
+static inline void avs_dump_fw_log(struct avs_dev *adev, const void __iomem *src, unsigned int len)
+{
+}
+
+static inline void
+avs_dump_fw_log_wakeup(struct avs_dev *adev, const void __iomem *src, unsigned int len)
+{
+}
+#endif
+
 #endif /* __SOUND_SOC_INTEL_AVS_H */
diff --git a/sound/soc/intel/avs/debugfs.c b/sound/soc/intel/avs/debugfs.c
new file mode 100644
index 000000000000..ac3889e21542
--- /dev/null
+++ b/sound/soc/intel/avs/debugfs.c
@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// Copyright(c) 2021-2022 Intel Corporation. All rights reserved.
+//
+// Authors: Cezary Rojewski <cezary.rojewski@intel.com>
+//          Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>
+//
+
+#include <linux/debugfs.h>
+#include <linux/kfifo.h>
+#include <linux/wait.h>
+#include "avs.h"
+
+bool avs_logging_fw(struct avs_dev *adev)
+{
+	return kfifo_initialized(&adev->trace_fifo);
+}
+
+void avs_dump_fw_log(struct avs_dev *adev, const void __iomem *src, unsigned int len)
+{
+	__kfifo_fromio(&adev->trace_fifo, src, len);
+}
+
+void avs_dump_fw_log_wakeup(struct avs_dev *adev, const void __iomem *src, unsigned int len)
+{
+	avs_dump_fw_log(adev, src, len);
+	wake_up(&adev->trace_waitq);
+}
-- 
2.25.1

[PATCH v2 07/16] ASoC: Intel: avs: Make enable_logs() dependent on DEBUG_FS

[Cezary Rojewski]

Without debug filesystem present, this code is redundant.
Operations: log_buffer_status and log_buffer_offset are left as is as
EXCEPTION_CAUGHT and even unexpected LOG_BUFFER_STATUS notifications may
occur without user ever touching debugfs.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
---
 sound/soc/intel/avs/apl.c      |  7 ++++---
 sound/soc/intel/avs/avs.h      |  5 +++++
 sound/soc/intel/avs/messages.c | 36 ++++++++++++++++++----------------
 sound/soc/intel/avs/skl.c      |  7 ++++---
 4 files changed, 32 insertions(+), 23 deletions(-)

diff --git a/sound/soc/intel/avs/apl.c b/sound/soc/intel/avs/apl.c
index 66672ffd95df..beef308c9428 100644
--- a/sound/soc/intel/avs/apl.c
+++ b/sound/soc/intel/avs/apl.c
@@ -13,8 +13,9 @@
 #include "path.h"
 #include "topology.h"
 
-static int apl_enable_logs(struct avs_dev *adev, enum avs_log_enable enable, u32 aging_period,
-			   u32 fifo_full_period, unsigned long resource_mask, u32 *priorities)
+static int __maybe_unused
+apl_enable_logs(struct avs_dev *adev, enum avs_log_enable enable, u32 aging_period,
+		u32 fifo_full_period, unsigned long resource_mask, u32 *priorities)
 {
 	struct apl_log_state_info *info;
 	u32 size, num_cores = adev->hw_cfg.dsp_cores;
@@ -239,10 +240,10 @@ const struct avs_dsp_ops apl_dsp_ops = {
 	.load_basefw = avs_hda_load_basefw,
 	.load_lib = avs_hda_load_library,
 	.transfer_mods = avs_hda_transfer_modules,
-	.enable_logs = apl_enable_logs,
 	.log_buffer_offset = skl_log_buffer_offset,
 	.log_buffer_status = apl_log_buffer_status,
 	.coredump = apl_coredump,
 	.d0ix_toggle = apl_d0ix_toggle,
 	.set_d0ix = apl_set_d0ix,
+	AVS_SET_ENABLE_LOGS_OP(apl)
 };
diff --git a/sound/soc/intel/avs/avs.h b/sound/soc/intel/avs/avs.h
index 3687d03f87d4..f8f11d8b5936 100644
--- a/sound/soc/intel/avs/avs.h
+++ b/sound/soc/intel/avs/avs.h
@@ -376,10 +376,15 @@ struct apl_log_buffer_layout {
 	(addr + sizeof(struct apl_log_buffer_layout))
 
 #ifdef CONFIG_DEBUG_FS
+#define AVS_SET_ENABLE_LOGS_OP(name) \
+	.enable_logs = name##_enable_logs
+
 bool avs_logging_fw(struct avs_dev *adev);
 void avs_dump_fw_log(struct avs_dev *adev, const void __iomem *src, unsigned int len);
 void avs_dump_fw_log_wakeup(struct avs_dev *adev, const void __iomem *src, unsigned int len);
 #else
+#define AVS_SET_ENABLE_LOGS_OP(name)
+
 static inline bool avs_logging_fw(struct avs_dev *adev)
 {
 	return false;
diff --git a/sound/soc/intel/avs/messages.c b/sound/soc/intel/avs/messages.c
index 6b0fecbf07c3..f734d49e42be 100644
--- a/sound/soc/intel/avs/messages.c
+++ b/sound/soc/intel/avs/messages.c
@@ -685,6 +685,24 @@ int avs_ipc_get_modules_info(struct avs_dev *adev, struct avs_mods_info **info)
 	return 0;
 }
 
+int avs_ipc_copier_set_sink_format(struct avs_dev *adev, u16 module_id,
+				   u8 instance_id, u32 sink_id,
+				   const struct avs_audio_format *src_fmt,
+				   const struct avs_audio_format *sink_fmt)
+{
+	struct avs_copier_sink_format cpr_fmt;
+
+	cpr_fmt.sink_id = sink_id;
+	/* Firmware expects driver to resend copier's input format. */
+	cpr_fmt.src_fmt = *src_fmt;
+	cpr_fmt.sink_fmt = *sink_fmt;
+
+	return avs_ipc_set_large_config(adev, module_id, instance_id,
+					AVS_COPIER_SET_SINK_FORMAT,
+					(u8 *)&cpr_fmt, sizeof(cpr_fmt));
+}
+
+#ifdef CONFIG_DEBUG_FS
 int avs_ipc_set_enable_logs(struct avs_dev *adev, u8 *log_info, size_t size)
 {
 	return avs_ipc_set_large_config(adev, AVS_BASEFW_MOD_ID, AVS_BASEFW_INST_ID,
@@ -704,20 +722,4 @@ int avs_ipc_set_system_time(struct avs_dev *adev)
 	return avs_ipc_set_large_config(adev, AVS_BASEFW_MOD_ID, AVS_BASEFW_INST_ID,
 					AVS_BASEFW_SYSTEM_TIME, (u8 *)&sys_time, sizeof(sys_time));
 }
-
-int avs_ipc_copier_set_sink_format(struct avs_dev *adev, u16 module_id,
-				   u8 instance_id, u32 sink_id,
-				   const struct avs_audio_format *src_fmt,
-				   const struct avs_audio_format *sink_fmt)
-{
-	struct avs_copier_sink_format cpr_fmt;
-
-	cpr_fmt.sink_id = sink_id;
-	/* Firmware expects driver to resend copier's input format. */
-	cpr_fmt.src_fmt = *src_fmt;
-	cpr_fmt.sink_fmt = *sink_fmt;
-
-	return avs_ipc_set_large_config(adev, module_id, instance_id,
-					AVS_COPIER_SET_SINK_FORMAT,
-					(u8 *)&cpr_fmt, sizeof(cpr_fmt));
-}
+#endif
diff --git a/sound/soc/intel/avs/skl.c b/sound/soc/intel/avs/skl.c
index 936cd44eb73e..c5edb0b0df14 100644
--- a/sound/soc/intel/avs/skl.c
+++ b/sound/soc/intel/avs/skl.c
@@ -12,8 +12,9 @@
 #include "avs.h"
 #include "messages.h"
 
-static int skl_enable_logs(struct avs_dev *adev, enum avs_log_enable enable, u32 aging_period,
-			   u32 fifo_full_period, unsigned long resource_mask, u32 *priorities)
+static int __maybe_unused
+skl_enable_logs(struct avs_dev *adev, enum avs_log_enable enable, u32 aging_period,
+		u32 fifo_full_period, unsigned long resource_mask, u32 *priorities)
 {
 	struct skl_log_state_info *info;
 	u32 size, num_cores = adev->hw_cfg.dsp_cores;
@@ -111,10 +112,10 @@ const struct avs_dsp_ops skl_dsp_ops = {
 	.load_basefw = avs_cldma_load_basefw,
 	.load_lib = avs_cldma_load_library,
 	.transfer_mods = avs_cldma_transfer_modules,
-	.enable_logs = skl_enable_logs,
 	.log_buffer_offset = skl_log_buffer_offset,
 	.log_buffer_status = skl_log_buffer_status,
 	.coredump = skl_coredump,
 	.d0ix_toggle = skl_d0ix_toggle,
 	.set_d0ix = skl_set_d0ix,
+	AVS_SET_ENABLE_LOGS_OP(skl)
 };
-- 
2.25.1

[PATCH v2 08/16] ASoC: Intel: avs: Drop usage of debug members in non-debug code

[Cezary Rojewski]

Switch to debug-context aware wrappers instead of accessing debug
members directly allowing for readable separation of debug and non-debug
related code. Duplicates are removed along the way.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
---
 sound/soc/intel/avs/apl.c     | 11 ++++-------
 sound/soc/intel/avs/avs.h     | 16 ++--------------
 sound/soc/intel/avs/debugfs.c | 18 ++++++++++++++++++
 sound/soc/intel/avs/skl.c     |  5 ++---
 sound/soc/intel/avs/utils.c   | 18 ------------------
 5 files changed, 26 insertions(+), 42 deletions(-)

diff --git a/sound/soc/intel/avs/apl.c b/sound/soc/intel/avs/apl.c
index beef308c9428..02683dce277a 100644
--- a/sound/soc/intel/avs/apl.c
+++ b/sound/soc/intel/avs/apl.c
@@ -59,21 +59,18 @@ static int apl_log_buffer_status(struct avs_dev *adev, union avs_notify_msg *msg
 
 	memcpy_fromio(&layout, addr, sizeof(layout));
 
-	if (!kfifo_initialized(&adev->dbg.trace_fifo))
+	if (!avs_logging_fw(adev))
 		/* consume the logs regardless of consumer presence */
 		goto update_read_ptr;
 
 	buf = apl_log_payload_addr(addr);
 
 	if (layout.read_ptr > layout.write_ptr) {
-		__kfifo_fromio(&adev->dbg.trace_fifo, buf + layout.read_ptr,
-			       apl_log_payload_size(adev) - layout.read_ptr);
+		avs_dump_fw_log(adev, buf + layout.read_ptr,
+				apl_log_payload_size(adev) - layout.read_ptr);
 		layout.read_ptr = 0;
 	}
-	__kfifo_fromio(&adev->dbg.trace_fifo, buf + layout.read_ptr,
-		       layout.write_ptr - layout.read_ptr);
-
-	wake_up(&adev->dbg.trace_waitq);
+	avs_dump_fw_log_wakeup(adev, buf + layout.read_ptr, layout.write_ptr - layout.read_ptr);
 
 update_read_ptr:
 	writel(layout.write_ptr, addr);
diff --git a/sound/soc/intel/avs/avs.h b/sound/soc/intel/avs/avs.h
index f8f11d8b5936..7a9fb27d3845 100644
--- a/sound/soc/intel/avs/avs.h
+++ b/sound/soc/intel/avs/avs.h
@@ -94,15 +94,6 @@ struct avs_fw_entry {
 	struct list_head node;
 };
 
-struct avs_debug {
-	struct kfifo trace_fifo;
-	spinlock_t trace_lock;	/* serialize debug window I/O between each LOG_BUFFER_STATUS */
-	wait_queue_head_t trace_waitq;
-	u32 aging_timer_period;
-	u32 fifo_full_timer_period;
-	u32 logged_resources;	/* context dependent: core or library */
-};
-
 /*
  * struct avs_dev - Intel HD-Audio driver data
  *
@@ -146,7 +137,6 @@ struct avs_dev {
 	spinlock_t path_list_lock;
 	struct mutex path_mutex;
 
-	struct avs_debug dbg;
 	spinlock_t trace_lock;	/* serialize debug window I/O between each LOG_BUFFER_STATUS */
 #ifdef CONFIG_DEBUG_FS
 	struct kfifo trace_fifo;
@@ -339,8 +329,6 @@ void avs_unregister_all_boards(struct avs_dev *adev);
 
 /* Firmware tracing helpers */
 
-unsigned int __kfifo_fromio(struct kfifo *fifo, const void __iomem *src, unsigned int len);
-
 #define avs_log_buffer_size(adev) \
 	((adev)->fw_cfg.trace_log_bytes / (adev)->hw_cfg.dsp_cores)
 
@@ -356,9 +344,9 @@ static inline int avs_log_buffer_status_locked(struct avs_dev *adev, union avs_n
 	unsigned long flags;
 	int ret;
 
-	spin_lock_irqsave(&adev->dbg.trace_lock, flags);
+	spin_lock_irqsave(&adev->trace_lock, flags);
 	ret = avs_dsp_op(adev, log_buffer_status, msg);
-	spin_unlock_irqrestore(&adev->dbg.trace_lock, flags);
+	spin_unlock_irqrestore(&adev->trace_lock, flags);
 
 	return ret;
 }
diff --git a/sound/soc/intel/avs/debugfs.c b/sound/soc/intel/avs/debugfs.c
index ac3889e21542..78705bcb09fb 100644
--- a/sound/soc/intel/avs/debugfs.c
+++ b/sound/soc/intel/avs/debugfs.c
@@ -11,6 +11,24 @@
 #include <linux/wait.h>
 #include "avs.h"
 
+static unsigned int __kfifo_fromio(struct kfifo *fifo, const void __iomem *src, unsigned int len)
+{
+	struct __kfifo *__fifo = &fifo->kfifo;
+	unsigned int l, off;
+
+	len = min(len, kfifo_avail(fifo));
+	off = __fifo->in & __fifo->mask;
+	l = min(len, kfifo_size(fifo) - off);
+
+	memcpy_fromio(__fifo->data + off, src, l);
+	memcpy_fromio(__fifo->data, src + l, len - l);
+	/* Make sure data copied from SRAM is visible to all CPUs. */
+	smp_mb();
+	__fifo->in += len;
+
+	return len;
+}
+
 bool avs_logging_fw(struct avs_dev *adev)
 {
 	return kfifo_initialized(&adev->trace_fifo);
diff --git a/sound/soc/intel/avs/skl.c b/sound/soc/intel/avs/skl.c
index c5edb0b0df14..6bb8bbc70442 100644
--- a/sound/soc/intel/avs/skl.c
+++ b/sound/soc/intel/avs/skl.c
@@ -59,7 +59,7 @@ skl_log_buffer_status(struct avs_dev *adev, union avs_notify_msg *msg)
 	void __iomem *buf;
 	u16 size, write, offset;
 
-	if (!kfifo_initialized(&adev->dbg.trace_fifo))
+	if (!avs_logging_fw(adev))
 		return 0;
 
 	size = avs_log_buffer_size(adev) / 2;
@@ -69,8 +69,7 @@ skl_log_buffer_status(struct avs_dev *adev, union avs_notify_msg *msg)
 
 	/* Address is guaranteed to exist in SRAM2. */
 	buf = avs_log_buffer_addr(adev, msg->log.core) + offset;
-	__kfifo_fromio(&adev->dbg.trace_fifo, buf, size);
-	wake_up(&adev->dbg.trace_waitq);
+	avs_dump_fw_log_wakeup(adev, buf, size);
 
 	return 0;
 }
diff --git a/sound/soc/intel/avs/utils.c b/sound/soc/intel/avs/utils.c
index 75ad434d7dfb..82416b86662d 100644
--- a/sound/soc/intel/avs/utils.c
+++ b/sound/soc/intel/avs/utils.c
@@ -300,21 +300,3 @@ void avs_release_firmwares(struct avs_dev *adev)
 		kfree(entry);
 	}
 }
-
-unsigned int __kfifo_fromio(struct kfifo *fifo, const void __iomem *src, unsigned int len)
-{
-	struct __kfifo *__fifo = &fifo->kfifo;
-	unsigned int l, off;
-
-	len = min(len, kfifo_avail(fifo));
-	off = __fifo->in & __fifo->mask;
-	l = min(len, kfifo_size(fifo) - off);
-
-	memcpy_fromio(__fifo->data + off, src, l);
-	memcpy_fromio(__fifo->data, src + l, len - l);
-	/* Make sure data copied from SRAM is visible to all CPUs. */
-	smp_mb();
-	__fifo->in += len;
-
-	return len;
-}
-- 
2.25.1

[PATCH v2 09/16] ASoC: Intel: avs: Add data probing requests

[Cezary Rojewski]

Data probing is a cAVS firmware functionality that allows for data
extraction and injection directly from or to DMA stream. To support it,
new functions and types are added. These facilitate communication
with the firmware.

Total of eight IPCs:
- probe module initialization and cleanup
- addition and removal of probe points
- addition and removal of injection DMAs
- dumping list of currently connected probe points or enlisted DMAs

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
---
 sound/soc/intel/avs/Makefile   |  2 +-
 sound/soc/intel/avs/messages.c | 78 ++++++++++++++++++++++++++++++++++
 sound/soc/intel/avs/messages.h | 53 +++++++++++++++++++++++
 sound/soc/intel/avs/probes.c   | 46 ++++++++++++++++++++
 4 files changed, 178 insertions(+), 1 deletion(-)
 create mode 100644 sound/soc/intel/avs/probes.c

diff --git a/sound/soc/intel/avs/Makefile b/sound/soc/intel/avs/Makefile
index a211a0b7b4a8..1c6924a1ebca 100644
--- a/sound/soc/intel/avs/Makefile
+++ b/sound/soc/intel/avs/Makefile
@@ -10,7 +10,7 @@ snd-soc-avs-objs += trace.o
 CFLAGS_trace.o := -I$(src)
 
 ifneq ($(CONFIG_DEBUG_FS),)
-snd-soc-avs-objs += debugfs.o
+snd-soc-avs-objs += probes.o debugfs.o
 endif
 
 obj-$(CONFIG_SND_SOC_INTEL_AVS) += snd-soc-avs.o
diff --git a/sound/soc/intel/avs/messages.c b/sound/soc/intel/avs/messages.c
index f734d49e42be..e11ae4246416 100644
--- a/sound/soc/intel/avs/messages.c
+++ b/sound/soc/intel/avs/messages.c
@@ -722,4 +722,82 @@ int avs_ipc_set_system_time(struct avs_dev *adev)
 	return avs_ipc_set_large_config(adev, AVS_BASEFW_MOD_ID, AVS_BASEFW_INST_ID,
 					AVS_BASEFW_SYSTEM_TIME, (u8 *)&sys_time, sizeof(sys_time));
 }
+
+int avs_ipc_probe_get_dma(struct avs_dev *adev, struct avs_probe_dma **dmas, size_t *num_dmas)
+{
+	size_t payload_size;
+	u32 module_id;
+	u8 *payload;
+	int ret;
+
+	module_id = avs_get_module_id(adev, &AVS_PROBE_MOD_UUID);
+
+	ret = avs_ipc_get_large_config(adev, module_id, AVS_PROBE_INST_ID, AVS_PROBE_INJECTION_DMA,
+				       NULL, 0, &payload, &payload_size);
+	if (ret)
+		return ret;
+
+	*dmas = (struct avs_probe_dma *)payload;
+	*num_dmas = payload_size / sizeof(**dmas);
+
+	return 0;
+}
+
+int avs_ipc_probe_attach_dma(struct avs_dev *adev, struct avs_probe_dma *dmas, size_t num_dmas)
+{
+	u32 module_id = avs_get_module_id(adev, &AVS_PROBE_MOD_UUID);
+
+	return avs_ipc_set_large_config(adev, module_id, AVS_PROBE_INST_ID, AVS_PROBE_INJECTION_DMA,
+					(u8 *)dmas, array_size(sizeof(*dmas), num_dmas));
+}
+
+int avs_ipc_probe_detach_dma(struct avs_dev *adev, union avs_connector_node_id *node_ids,
+			     size_t num_node_ids)
+{
+	u32 module_id = avs_get_module_id(adev, &AVS_PROBE_MOD_UUID);
+
+	return avs_ipc_set_large_config(adev, module_id, AVS_PROBE_INST_ID,
+					AVS_PROBE_INJECTION_DMA_DETACH, (u8 *)node_ids,
+					array_size(sizeof(*node_ids), num_node_ids));
+}
+
+int avs_ipc_probe_get_points(struct avs_dev *adev, struct avs_probe_point_desc **descs,
+			     size_t *num_descs)
+{
+	size_t payload_size;
+	u32 module_id;
+	u8 *payload;
+	int ret;
+
+	module_id = avs_get_module_id(adev, &AVS_PROBE_MOD_UUID);
+
+	ret = avs_ipc_get_large_config(adev, module_id, AVS_PROBE_INST_ID, AVS_PROBE_POINTS, NULL,
+				       0, &payload, &payload_size);
+	if (ret)
+		return ret;
+
+	*descs = (struct avs_probe_point_desc *)payload;
+	*num_descs = payload_size / sizeof(**descs);
+
+	return 0;
+}
+
+int avs_ipc_probe_connect_points(struct avs_dev *adev, struct avs_probe_point_desc *descs,
+				 size_t num_descs)
+{
+	u32 module_id = avs_get_module_id(adev, &AVS_PROBE_MOD_UUID);
+
+	return avs_ipc_set_large_config(adev, module_id, AVS_PROBE_INST_ID, AVS_PROBE_POINTS,
+					(u8 *)descs, array_size(sizeof(*descs), num_descs));
+}
+
+int avs_ipc_probe_disconnect_points(struct avs_dev *adev, union avs_probe_point_id *ids,
+				    size_t num_ids)
+{
+	u32 module_id = avs_get_module_id(adev, &AVS_PROBE_MOD_UUID);
+
+	return avs_ipc_set_large_config(adev, module_id, AVS_PROBE_INST_ID,
+					AVS_PROBE_POINTS_DISCONNECT, (u8 *)ids,
+					array_size(sizeof(*ids), num_ids));
+}
 #endif
diff --git a/sound/soc/intel/avs/messages.h b/sound/soc/intel/avs/messages.h
index 02b3b7a74783..9dd835527e02 100644
--- a/sound/soc/intel/avs/messages.h
+++ b/sound/soc/intel/avs/messages.h
@@ -802,4 +802,57 @@ int avs_ipc_copier_set_sink_format(struct avs_dev *adev, u16 module_id,
 				   const struct avs_audio_format *src_fmt,
 				   const struct avs_audio_format *sink_fmt);
 
+#define AVS_PROBE_INST_ID	0
+
+enum avs_probe_runtime_param {
+	AVS_PROBE_INJECTION_DMA = 1,
+	AVS_PROBE_INJECTION_DMA_DETACH,
+	AVS_PROBE_POINTS,
+	AVS_PROBE_POINTS_DISCONNECT,
+};
+
+struct avs_probe_dma {
+	union avs_connector_node_id node_id;
+	u32 dma_buffer_size;
+} __packed;
+
+enum avs_probe_type {
+	AVS_PROBE_TYPE_INPUT = 0,
+	AVS_PROBE_TYPE_OUTPUT,
+	AVS_PROBE_TYPE_INTERNAL
+};
+
+union avs_probe_point_id {
+	u32 value;
+	struct {
+		u32 module_id:16;
+		u32 instance_id:8;
+		u32 type:2;
+		u32 index:6;
+	} id;
+} __packed;
+
+enum avs_connection_purpose {
+	AVS_CONNECTION_PURPOSE_EXTRACT = 0,
+	AVS_CONNECTION_PURPOSE_INJECT,
+	AVS_CONNECTION_PURPOSE_INJECT_REEXTRACT,
+};
+
+struct avs_probe_point_desc {
+	union avs_probe_point_id id;
+	u32 purpose;
+	union avs_connector_node_id node_id;
+} __packed;
+
+int avs_ipc_probe_get_dma(struct avs_dev *adev, struct avs_probe_dma **dmas, size_t *num_dmas);
+int avs_ipc_probe_attach_dma(struct avs_dev *adev, struct avs_probe_dma *dmas, size_t num_dmas);
+int avs_ipc_probe_detach_dma(struct avs_dev *adev, union avs_connector_node_id *node_ids,
+			     size_t num_node_ids);
+int avs_ipc_probe_get_points(struct avs_dev *adev, struct avs_probe_point_desc **descs,
+			     size_t *num_descs);
+int avs_ipc_probe_connect_points(struct avs_dev *adev, struct avs_probe_point_desc *descs,
+				 size_t num_descs);
+int avs_ipc_probe_disconnect_points(struct avs_dev *adev, union avs_probe_point_id *ids,
+				    size_t num_ids);
+
 #endif /* __SOUND_SOC_INTEL_AVS_MSGS_H */
diff --git a/sound/soc/intel/avs/probes.c b/sound/soc/intel/avs/probes.c
new file mode 100644
index 000000000000..339bad6fec22
--- /dev/null
+++ b/sound/soc/intel/avs/probes.c
@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// Copyright(c) 2021-2022 Intel Corporation. All rights reserved.
+//
+// Authors: Cezary Rojewski <cezary.rojewski@intel.com>
+//          Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>
+//
+
+#include "avs.h"
+#include "messages.h"
+
+__maybe_unused
+static int avs_dsp_init_probe(struct avs_dev *adev, union avs_connector_node_id node_id,
+			      size_t buffer_size)
+
+{
+	struct avs_probe_cfg cfg = {{0}};
+	struct avs_module_entry mentry;
+	u16 dummy;
+
+	avs_get_module_entry(adev, &AVS_PROBE_MOD_UUID, &mentry);
+
+	/*
+	 * Probe module uses no cycles, audio data format and input and output
+	 * frame sizes are unused. It is also not owned by any pipeline.
+	 */
+	cfg.base.ibs = 1;
+	/* BSS module descriptor is always segment of index=2. */
+	cfg.base.is_pages = mentry.segments[2].flags.length;
+	cfg.gtw_cfg.node_id = node_id;
+	cfg.gtw_cfg.dma_buffer_size = buffer_size;
+
+	return avs_dsp_init_module(adev, mentry.module_id, INVALID_PIPELINE_ID, 0, 0, &cfg,
+				   sizeof(cfg), &dummy);
+}
+
+__maybe_unused
+static void avs_dsp_delete_probe(struct avs_dev *adev)
+{
+	struct avs_module_entry mentry;
+
+	avs_get_module_entry(adev, &AVS_PROBE_MOD_UUID, &mentry);
+
+	/* There is only ever one probe module instance. */
+	avs_dsp_delete_module(adev, mentry.module_id, 0, INVALID_PIPELINE_ID, 0);
+}
-- 
2.25.1

[PATCH v2 10/16] ASoC: Intel: avs: Probe compress operations

[Cezary Rojewski]

Add compress operations handlers for data extraction through probes. A
single HDAudio stream is enlisted for said purpose. Operations follow
same protocol as for standard PCM streaming on HOST side.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
---
 sound/soc/intel/Kconfig      |   1 +
 sound/soc/intel/avs/avs.h    |   3 +
 sound/soc/intel/avs/probes.c | 224 ++++++++++++++++++++++++++++++++++-
 3 files changed, 225 insertions(+), 3 deletions(-)

diff --git a/sound/soc/intel/Kconfig b/sound/soc/intel/Kconfig
index ac799de4f7fd..4b9e498e3303 100644
--- a/sound/soc/intel/Kconfig
+++ b/sound/soc/intel/Kconfig
@@ -217,6 +217,7 @@ config SND_SOC_INTEL_AVS
 	select SND_SOC_ACPI if ACPI
 	select SND_SOC_TOPOLOGY
 	select SND_SOC_HDA
+	select SND_SOC_COMPRESS if DEBUG_FS
 	select SND_HDA_EXT_CORE
 	select SND_HDA_DSP_LOADER
 	select SND_INTEL_DSP_CONFIG
diff --git a/sound/soc/intel/avs/avs.h b/sound/soc/intel/avs/avs.h
index 7a9fb27d3845..e5e7c72eb511 100644
--- a/sound/soc/intel/avs/avs.h
+++ b/sound/soc/intel/avs/avs.h
@@ -144,6 +144,9 @@ struct avs_dev {
 	u32 aging_timer_period;
 	u32 fifo_full_timer_period;
 	u32 logged_resources;	/* context dependent: core or library */
+	/* probes */
+	struct hdac_ext_stream *extractor;
+	unsigned int num_probe_streams;
 #endif
 };
 
diff --git a/sound/soc/intel/avs/probes.c b/sound/soc/intel/avs/probes.c
index 339bad6fec22..e90284ec8500 100644
--- a/sound/soc/intel/avs/probes.c
+++ b/sound/soc/intel/avs/probes.c
@@ -6,13 +6,15 @@
 //          Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>
 //
 
+#include <sound/compress_driver.h>
+#include <sound/hdaudio_ext.h>
+#include <sound/hdaudio.h>
+#include <sound/soc.h>
 #include "avs.h"
 #include "messages.h"
 
-__maybe_unused
 static int avs_dsp_init_probe(struct avs_dev *adev, union avs_connector_node_id node_id,
 			      size_t buffer_size)
-
 {
 	struct avs_probe_cfg cfg = {{0}};
 	struct avs_module_entry mentry;
@@ -34,7 +36,6 @@ static int avs_dsp_init_probe(struct avs_dev *adev, union avs_connector_node_id
 				   sizeof(cfg), &dummy);
 }
 
-__maybe_unused
 static void avs_dsp_delete_probe(struct avs_dev *adev)
 {
 	struct avs_module_entry mentry;
@@ -44,3 +45,220 @@ static void avs_dsp_delete_probe(struct avs_dev *adev)
 	/* There is only ever one probe module instance. */
 	avs_dsp_delete_module(adev, mentry.module_id, 0, INVALID_PIPELINE_ID, 0);
 }
+
+static inline struct hdac_ext_stream *avs_compr_get_host_stream(struct snd_compr_stream *cstream)
+{
+	return cstream->runtime->private_data;
+}
+
+static int avs_probe_compr_open(struct snd_compr_stream *cstream, struct snd_soc_dai *dai)
+{
+	struct avs_dev *adev = to_avs_dev(dai->dev);
+	struct hdac_bus *bus = &adev->base.core;
+	struct hdac_ext_stream *host_stream;
+
+	if (adev->extractor) {
+		dev_err(dai->dev, "Cannot open more than one extractor stream\n");
+		return -EEXIST;
+	}
+
+	host_stream = snd_hdac_ext_cstream_assign(bus, cstream);
+	if (!host_stream) {
+		dev_err(dai->dev, "Failed to assign HDAudio stream for extraction\n");
+		return -EBUSY;
+	}
+
+	adev->extractor = host_stream;
+	hdac_stream(host_stream)->curr_pos = 0;
+	cstream->runtime->private_data = host_stream;
+
+	return 0;
+}
+
+static int avs_probe_compr_free(struct snd_compr_stream *cstream, struct snd_soc_dai *dai)
+{
+	struct hdac_ext_stream *host_stream = avs_compr_get_host_stream(cstream);
+	struct avs_dev *adev = to_avs_dev(dai->dev);
+	struct avs_probe_point_desc *desc;
+	/* Extractor node identifier. */
+	unsigned int vindex = INVALID_NODE_ID.vindex;
+	size_t num_desc;
+	int i, ret;
+
+	/* Disconnect all probe points. */
+	ret = avs_ipc_probe_get_points(adev, &desc, &num_desc);
+	if (ret) {
+		dev_err(dai->dev, "get probe points failed: %d\n", ret);
+		ret = AVS_IPC_RET(ret);
+		goto exit;
+	}
+
+	for (i = 0; i < num_desc; i++)
+		if (desc[i].node_id.vindex == vindex)
+			avs_ipc_probe_disconnect_points(adev, &desc[i].id, 1);
+	kfree(desc);
+
+exit:
+	if (adev->num_probe_streams) {
+		adev->num_probe_streams--;
+		if (!adev->num_probe_streams) {
+			avs_dsp_delete_probe(adev);
+			avs_dsp_enable_d0ix(adev);
+		}
+	}
+
+	snd_hdac_stream_cleanup(hdac_stream(host_stream));
+	hdac_stream(host_stream)->prepared = 0;
+	snd_hdac_ext_stream_release(host_stream, HDAC_EXT_STREAM_TYPE_HOST);
+
+	snd_compr_free_pages(cstream);
+	adev->extractor = NULL;
+
+	return ret;
+}
+
+static int avs_probe_compr_set_params(struct snd_compr_stream *cstream,
+				      struct snd_compr_params *params, struct snd_soc_dai *dai)
+{
+	struct hdac_ext_stream *host_stream = avs_compr_get_host_stream(cstream);
+	struct snd_compr_runtime *rtd = cstream->runtime;
+	struct avs_dev *adev = to_avs_dev(dai->dev);
+	/* compr params do not store bit depth, default to S32_LE. */
+	snd_pcm_format_t format = SNDRV_PCM_FORMAT_S32_LE;
+	unsigned int format_val;
+	int bps, ret;
+
+	hdac_stream(host_stream)->bufsize = 0;
+	hdac_stream(host_stream)->period_bytes = 0;
+	hdac_stream(host_stream)->format_val = 0;
+	cstream->dma_buffer.dev.type = SNDRV_DMA_TYPE_DEV_SG;
+	cstream->dma_buffer.dev.dev = adev->dev;
+
+	ret = snd_compr_malloc_pages(cstream, rtd->buffer_size);
+	if (ret < 0)
+		return ret;
+	bps = snd_pcm_format_physical_width(format);
+	if (bps < 0)
+		return bps;
+	format_val = snd_hdac_calc_stream_format(params->codec.sample_rate, params->codec.ch_out,
+						 format, bps, 0);
+	ret = snd_hdac_stream_set_params(hdac_stream(host_stream), format_val);
+	if (ret < 0)
+		return ret;
+	ret = snd_hdac_stream_setup(hdac_stream(host_stream));
+	if (ret < 0)
+		return ret;
+
+	hdac_stream(host_stream)->prepared = 1;
+
+	if (!adev->num_probe_streams) {
+		union avs_connector_node_id node_id;
+
+		/* D0ix not allowed during probing. */
+		ret = avs_dsp_disable_d0ix(adev);
+		if (ret)
+			return ret;
+
+		node_id.vindex = hdac_stream(host_stream)->stream_tag - 1;
+		node_id.dma_type = AVS_DMA_HDA_HOST_INPUT;
+
+		ret = avs_dsp_init_probe(adev, node_id, rtd->dma_bytes);
+		if (ret < 0) {
+			dev_err(dai->dev, "probe init failed: %d\n", ret);
+			avs_dsp_enable_d0ix(adev);
+			return ret;
+		}
+	}
+
+	adev->num_probe_streams++;
+	return 0;
+}
+
+static int avs_probe_compr_trigger(struct snd_compr_stream *cstream, int cmd,
+				   struct snd_soc_dai *dai)
+{
+	struct hdac_ext_stream *host_stream = avs_compr_get_host_stream(cstream);
+	struct avs_dev *adev = to_avs_dev(dai->dev);
+	struct hdac_bus *bus = &adev->base.core;
+	unsigned long cookie;
+
+	if (!hdac_stream(host_stream)->prepared)
+		return -EPIPE;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+	case SNDRV_PCM_TRIGGER_RESUME:
+		spin_lock_irqsave(&bus->reg_lock, cookie);
+		snd_hdac_stream_start(hdac_stream(host_stream), true);
+		spin_unlock_irqrestore(&bus->reg_lock, cookie);
+		break;
+
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_STOP:
+		spin_lock_irqsave(&bus->reg_lock, cookie);
+		snd_hdac_stream_stop(hdac_stream(host_stream));
+		spin_unlock_irqrestore(&bus->reg_lock, cookie);
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int avs_probe_compr_pointer(struct snd_compr_stream *cstream,
+				   struct snd_compr_tstamp *tstamp, struct snd_soc_dai *dai)
+{
+	struct hdac_ext_stream *host_stream = avs_compr_get_host_stream(cstream);
+	struct snd_soc_pcm_stream *pstream;
+
+	pstream = &dai->driver->capture;
+	tstamp->copied_total = hdac_stream(host_stream)->curr_pos;
+	tstamp->sampling_rate = snd_pcm_rate_bit_to_rate(pstream->rates);
+
+	return 0;
+}
+
+static int avs_probe_compr_copy(struct snd_soc_component *comp, struct snd_compr_stream *cstream,
+				char __user *buf, size_t count)
+{
+	struct snd_compr_runtime *rtd = cstream->runtime;
+	unsigned int offset, n;
+	void *ptr;
+	int ret;
+
+	if (count > rtd->buffer_size)
+		count = rtd->buffer_size;
+
+	div_u64_rem(rtd->total_bytes_transferred, rtd->buffer_size, &offset);
+	ptr = rtd->dma_area + offset;
+	n = rtd->buffer_size - offset;
+
+	if (count < n) {
+		ret = copy_to_user(buf, ptr, count);
+	} else {
+		ret = copy_to_user(buf, ptr, n);
+		ret += copy_to_user(buf + n, rtd->dma_area, count - n);
+	}
+
+	if (ret)
+		return count - ret;
+	return count;
+}
+
+__maybe_unused
+static const struct snd_soc_cdai_ops avs_probe_dai_ops = {
+	.startup = avs_probe_compr_open,
+	.shutdown = avs_probe_compr_free,
+	.set_params = avs_probe_compr_set_params,
+	.trigger = avs_probe_compr_trigger,
+	.pointer = avs_probe_compr_pointer,
+};
+
+__maybe_unused
+static const struct snd_compress_ops avs_probe_compress_ops = {
+	.copy = avs_probe_compr_copy,
+};
-- 
2.25.1

[PATCH v2 11/16] ASoC: Intel: avs: Data probing soc-component

[Cezary Rojewski]

Define stub component for data probing. Stub as most operations from
standard PCM case do not apply here. Specific bits are CPU DAIs and
compress_ops. FE DAIs can link against these new CPU DAI to create new
compress devices.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
---
 sound/soc/intel/avs/avs.h    | 10 +++++++
 sound/soc/intel/avs/pcm.c    |  6 ++--
 sound/soc/intel/avs/probes.c | 53 ++++++++++++++++++++++++++++++++++--
 3 files changed, 64 insertions(+), 5 deletions(-)

diff --git a/sound/soc/intel/avs/avs.h b/sound/soc/intel/avs/avs.h
index e5e7c72eb511..e19d8d89455d 100644
--- a/sound/soc/intel/avs/avs.h
+++ b/sound/soc/intel/avs/avs.h
@@ -322,6 +322,9 @@ struct avs_soc_component {
 
 extern const struct snd_soc_dai_ops avs_dai_fe_ops;
 
+int avs_soc_component_register(struct device *dev, const char *name,
+			       const struct snd_soc_component_driver *drv,
+			       struct snd_soc_dai_driver *cpu_dais, int num_cpu_dais);
 int avs_dmic_platform_register(struct avs_dev *adev, const char *name);
 int avs_i2s_platform_register(struct avs_dev *adev, const char *name, unsigned long port_mask,
 			      unsigned long *tdms);
@@ -373,6 +376,8 @@ struct apl_log_buffer_layout {
 bool avs_logging_fw(struct avs_dev *adev);
 void avs_dump_fw_log(struct avs_dev *adev, const void __iomem *src, unsigned int len);
 void avs_dump_fw_log_wakeup(struct avs_dev *adev, const void __iomem *src, unsigned int len);
+
+int avs_probe_platform_register(struct avs_dev *adev, const char *name);
 #else
 #define AVS_SET_ENABLE_LOGS_OP(name)
 
@@ -389,6 +394,11 @@ static inline void
 avs_dump_fw_log_wakeup(struct avs_dev *adev, const void __iomem *src, unsigned int len)
 {
 }
+
+static inline int avs_probe_platform_register(struct avs_dev *adev, const char *name)
+{
+	return 0;
+}
 #endif
 
 #endif /* __SOUND_SOC_INTEL_AVS_H */
diff --git a/sound/soc/intel/avs/pcm.c b/sound/soc/intel/avs/pcm.c
index 70d687fa9923..f930c5e86a84 100644
--- a/sound/soc/intel/avs/pcm.c
+++ b/sound/soc/intel/avs/pcm.c
@@ -1126,9 +1126,9 @@ static const struct snd_soc_component_driver avs_component_driver = {
 	.topology_name_prefix	= "intel/avs",
 };
 
-static int avs_soc_component_register(struct device *dev, const char *name,
-				      const struct snd_soc_component_driver *drv,
-				      struct snd_soc_dai_driver *cpu_dais, int num_cpu_dais)
+int avs_soc_component_register(struct device *dev, const char *name,
+			       const struct snd_soc_component_driver *drv,
+			       struct snd_soc_dai_driver *cpu_dais, int num_cpu_dais)
 {
 	struct avs_soc_component *acomp;
 	int ret;
diff --git a/sound/soc/intel/avs/probes.c b/sound/soc/intel/avs/probes.c
index e90284ec8500..29d63f2a9616 100644
--- a/sound/soc/intel/avs/probes.c
+++ b/sound/soc/intel/avs/probes.c
@@ -249,7 +249,6 @@ static int avs_probe_compr_copy(struct snd_soc_component *comp, struct snd_compr
 	return count;
 }
 
-__maybe_unused
 static const struct snd_soc_cdai_ops avs_probe_dai_ops = {
 	.startup = avs_probe_compr_open,
 	.shutdown = avs_probe_compr_free,
@@ -258,7 +257,57 @@ static const struct snd_soc_cdai_ops avs_probe_dai_ops = {
 	.pointer = avs_probe_compr_pointer,
 };
 
-__maybe_unused
 static const struct snd_compress_ops avs_probe_compress_ops = {
 	.copy = avs_probe_compr_copy,
 };
+
+static struct snd_soc_dai_driver probe_cpu_dais[] = {
+{
+	.name = "Probe Extraction CPU DAI",
+	.compress_new = snd_soc_new_compress,
+	.cops = &avs_probe_dai_ops,
+	.capture = {
+		.stream_name = "Probe Extraction",
+		.channels_min = 1,
+		.channels_max = 8,
+		.rates = SNDRV_PCM_RATE_48000,
+		.rate_min = 48000,
+		.rate_max = 48000,
+	},
+},
+};
+
+static int avs_probe_component_probe(struct snd_soc_component *component)
+{
+	struct avs_soc_component *acomp = to_avs_soc_component(component);
+	struct avs_dev *adev = to_avs_dev(component->dev);
+
+	mutex_lock(&adev->comp_list_mutex);
+	list_add_tail(&acomp->node, &adev->comp_list);
+	mutex_unlock(&adev->comp_list_mutex);
+	return 0;
+}
+
+static void avs_probe_component_remove(struct snd_soc_component *component)
+{
+	struct avs_soc_component *acomp = to_avs_soc_component(component);
+	struct avs_dev *adev = to_avs_dev(component->dev);
+
+	mutex_lock(&adev->comp_list_mutex);
+	list_del(&acomp->node);
+	mutex_unlock(&adev->comp_list_mutex);
+}
+
+static const struct snd_soc_component_driver avs_probe_component_driver = {
+	.name			= "avs-probe-compr",
+	.probe			= avs_probe_component_probe,
+	.remove			= avs_probe_component_remove,
+	.compress_ops		= &avs_probe_compress_ops,
+	.module_get_upon_open	= 1, /* increment refcount when a stream is opened */
+};
+
+int avs_probe_platform_register(struct avs_dev *adev, const char *name)
+{
+	return avs_soc_component_register(adev->dev, name, &avs_probe_component_driver,
+					  probe_cpu_dais, ARRAY_SIZE(probe_cpu_dais));
+}
-- 
2.25.1

[PATCH v2 12/16] ASoC: Intel: avs: Add probe machine board

[Cezary Rojewski]

Stub machine board driver with no custom DAPM routes and single FE DAI
link for userspace to interact with.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
---
 sound/soc/intel/avs/board_selection.c | 33 ++++++++++++++
 sound/soc/intel/avs/boards/Kconfig    |  8 ++++
 sound/soc/intel/avs/boards/Makefile   |  2 +
 sound/soc/intel/avs/boards/probe.c    | 64 +++++++++++++++++++++++++++
 4 files changed, 107 insertions(+)
 create mode 100644 sound/soc/intel/avs/boards/probe.c

diff --git a/sound/soc/intel/avs/board_selection.c b/sound/soc/intel/avs/board_selection.c
index 02cc1ce8f5f5..b2823c2107f7 100644
--- a/sound/soc/intel/avs/board_selection.c
+++ b/sound/soc/intel/avs/board_selection.c
@@ -291,6 +291,33 @@ static void board_pdev_unregister(void *data)
 	platform_device_unregister(data);
 }
 
+static int __maybe_unused avs_register_probe_board(struct avs_dev *adev)
+{
+	struct platform_device *board;
+	struct snd_soc_acpi_mach mach = {{0}};
+	int ret;
+
+	ret = avs_probe_platform_register(adev, "probe-platform");
+	if (ret < 0)
+		return ret;
+
+	mach.mach_params.platform = "probe-platform";
+
+	board = platform_device_register_data(NULL, "avs_probe_mb", PLATFORM_DEVID_NONE,
+					      (const void *)&mach, sizeof(mach));
+	if (IS_ERR(board)) {
+		dev_err(adev->dev, "probe board register failed\n");
+		return PTR_ERR(board);
+	}
+
+	ret = devm_add_action(adev->dev, board_pdev_unregister, board);
+	if (ret < 0) {
+		platform_device_unregister(board);
+		return ret;
+	}
+	return 0;
+}
+
 static int avs_register_dmic_board(struct avs_dev *adev)
 {
 	struct platform_device *codec, *board;
@@ -500,6 +527,12 @@ int avs_register_all_boards(struct avs_dev *adev)
 {
 	int ret;
 
+#ifdef CONFIG_DEBUG_FS
+	ret = avs_register_probe_board(adev);
+	if (ret < 0)
+		dev_warn(adev->dev, "enumerate PROBE endpoints failed: %d\n", ret);
+#endif
+
 	ret = avs_register_dmic_board(adev);
 	if (ret < 0)
 		dev_warn(adev->dev, "enumerate DMIC endpoints failed: %d\n",
diff --git a/sound/soc/intel/avs/boards/Kconfig b/sound/soc/intel/avs/boards/Kconfig
index 9bd40fdd9028..e4c230efe8d7 100644
--- a/sound/soc/intel/avs/boards/Kconfig
+++ b/sound/soc/intel/avs/boards/Kconfig
@@ -77,6 +77,14 @@ config SND_SOC_INTEL_AVS_MACH_NAU8825
 	   Say Y or m if you have such a device. This is a recommended option.
 	   If unsure select "N".
 
+config SND_SOC_INTEL_AVS_MACH_PROBE
+	tristate "Probing (data) board"
+	depends on DEBUG_FS
+	select SND_HWDEP
+	help
+	   This adds support for data probing board which can be used to
+	   gather data from runtime stream over compress operations.
+
 config SND_SOC_INTEL_AVS_MACH_RT274
 	tristate "rt274 in I2S mode"
 	depends on I2C
diff --git a/sound/soc/intel/avs/boards/Makefile b/sound/soc/intel/avs/boards/Makefile
index 4d70b8d09ce5..b81343420370 100644
--- a/sound/soc/intel/avs/boards/Makefile
+++ b/sound/soc/intel/avs/boards/Makefile
@@ -8,6 +8,7 @@ snd-soc-avs-max98927-objs := max98927.o
 snd-soc-avs-max98357a-objs := max98357a.o
 snd-soc-avs-max98373-objs := max98373.o
 snd-soc-avs-nau8825-objs := nau8825.o
+snd-soc-avs-probe-objs := probe.o
 snd-soc-avs-rt274-objs := rt274.o
 snd-soc-avs-rt286-objs := rt286.o
 snd-soc-avs-rt298-objs := rt298.o
@@ -22,6 +23,7 @@ obj-$(CONFIG_SND_SOC_INTEL_AVS_MACH_MAX98927) += snd-soc-avs-max98927.o
 obj-$(CONFIG_SND_SOC_INTEL_AVS_MACH_MAX98357A) += snd-soc-avs-max98357a.o
 obj-$(CONFIG_SND_SOC_INTEL_AVS_MACH_MAX98373) += snd-soc-avs-max98373.o
 obj-$(CONFIG_SND_SOC_INTEL_AVS_MACH_NAU8825) += snd-soc-avs-nau8825.o
+obj-$(CONFIG_SND_SOC_INTEL_AVS_MACH_PROBE) += snd-soc-avs-probe.o
 obj-$(CONFIG_SND_SOC_INTEL_AVS_MACH_RT274) += snd-soc-avs-rt274.o
 obj-$(CONFIG_SND_SOC_INTEL_AVS_MACH_RT286) += snd-soc-avs-rt286.o
 obj-$(CONFIG_SND_SOC_INTEL_AVS_MACH_RT298) += snd-soc-avs-rt298.o
diff --git a/sound/soc/intel/avs/boards/probe.c b/sound/soc/intel/avs/boards/probe.c
new file mode 100644
index 000000000000..411acaee74f9
--- /dev/null
+++ b/sound/soc/intel/avs/boards/probe.c
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// Copyright(c) 2021-2022 Intel Corporation. All rights reserved.
+//
+// Authors: Cezary Rojewski <cezary.rojewski@intel.com>
+//          Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>
+//
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <sound/soc.h>
+#include <sound/soc-acpi.h>
+
+SND_SOC_DAILINK_DEF(dummy, DAILINK_COMP_ARRAY(COMP_DUMMY()));
+SND_SOC_DAILINK_DEF(probe_cp, DAILINK_COMP_ARRAY(COMP_CPU("Probe Extraction CPU DAI")));
+SND_SOC_DAILINK_DEF(platform, DAILINK_COMP_ARRAY(COMP_PLATFORM("probe-platform")));
+
+static struct snd_soc_dai_link probe_mb_dai_links[] = {
+	{
+		.name = "Compress Probe Capture",
+		.nonatomic = 1,
+		SND_SOC_DAILINK_REG(probe_cp, dummy, platform),
+	},
+};
+
+static int avs_probe_mb_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct snd_soc_acpi_mach *mach;
+	struct snd_soc_card *card;
+	int ret;
+
+	mach = dev_get_platdata(dev);
+
+	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
+	if (!card)
+		return -ENOMEM;
+
+	card->name = "avs_probe_mb";
+	card->dev = dev;
+	card->owner = THIS_MODULE;
+	card->dai_link = probe_mb_dai_links;
+	card->num_links = ARRAY_SIZE(probe_mb_dai_links);
+	card->fully_routed = true;
+
+	ret = snd_soc_fixup_dai_links_platform_name(card, mach->mach_params.platform);
+	if (ret)
+		return ret;
+
+	return devm_snd_soc_register_card(dev, card);
+}
+
+static struct platform_driver avs_probe_mb_driver = {
+	.probe = avs_probe_mb_probe,
+	.driver = {
+		.name = "avs_probe_mb",
+		.pm = &snd_soc_pm_ops,
+	},
+};
+
+module_platform_driver(avs_probe_mb_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:avs_probe_mb");
-- 
2.25.1

[PATCH v2 13/16] ASoC: Intel: avs: Probing and firmware tracing over debugfs

[Cezary Rojewski]

Define debugfs subdirectory delegated for IPC communication with DSP.
Input format: uint,uint,(...) which are later translated into DWORDS
sequence and further into instances of struct of interest given the IPC
type.

For Extractor probes, following have been enabled:
- PROBE_POINT_ADD (echo <..> probe_points)
- PROBE_POINT_REMOVE (echo <..> probe_points_remove)
- PROBE_POINT_INFO (cat probe_points)

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
---
 sound/soc/intel/avs/avs.h     |   7 +
 sound/soc/intel/avs/core.c    |   2 +
 sound/soc/intel/avs/debugfs.c | 326 ++++++++++++++++++++++++++++++++++
 3 files changed, 335 insertions(+)

diff --git a/sound/soc/intel/avs/avs.h b/sound/soc/intel/avs/avs.h
index e19d8d89455d..d7fccdcb9c16 100644
--- a/sound/soc/intel/avs/avs.h
+++ b/sound/soc/intel/avs/avs.h
@@ -144,6 +144,7 @@ struct avs_dev {
 	u32 aging_timer_period;
 	u32 fifo_full_timer_period;
 	u32 logged_resources;	/* context dependent: core or library */
+	struct dentry *debugfs_root;
 	/* probes */
 	struct hdac_ext_stream *extractor;
 	unsigned int num_probe_streams;
@@ -378,6 +379,9 @@ void avs_dump_fw_log(struct avs_dev *adev, const void __iomem *src, unsigned int
 void avs_dump_fw_log_wakeup(struct avs_dev *adev, const void __iomem *src, unsigned int len);
 
 int avs_probe_platform_register(struct avs_dev *adev, const char *name);
+
+void avs_debugfs_init(struct avs_dev *adev);
+void avs_debugfs_exit(struct avs_dev *adev);
 #else
 #define AVS_SET_ENABLE_LOGS_OP(name)
 
@@ -399,6 +403,9 @@ static inline int avs_probe_platform_register(struct avs_dev *adev, const char *
 {
 	return 0;
 }
+
+static inline void avs_debugfs_init(struct avs_dev *adev) { }
+static inline void avs_debugfs_exit(struct avs_dev *adev) { }
 #endif
 
 #endif /* __SOUND_SOC_INTEL_AVS_H */
diff --git a/sound/soc/intel/avs/core.c b/sound/soc/intel/avs/core.c
index f7bc06404dbc..2ca24273c491 100644
--- a/sound/soc/intel/avs/core.c
+++ b/sound/soc/intel/avs/core.c
@@ -214,6 +214,7 @@ static void avs_hda_probe_work(struct work_struct *work)
 	adev->nhlt = intel_nhlt_init(adev->dev);
 	if (!adev->nhlt)
 		dev_info(bus->dev, "platform has no NHLT\n");
+	avs_debugfs_init(adev);
 
 	avs_register_all_boards(adev);
 
@@ -491,6 +492,7 @@ static void avs_pci_remove(struct pci_dev *pci)
 
 	avs_unregister_all_boards(adev);
 
+	avs_debugfs_exit(adev);
 	if (adev->nhlt)
 		intel_nhlt_free(adev->nhlt);
 
diff --git a/sound/soc/intel/avs/debugfs.c b/sound/soc/intel/avs/debugfs.c
index 78705bcb09fb..678572ee6b9d 100644
--- a/sound/soc/intel/avs/debugfs.c
+++ b/sound/soc/intel/avs/debugfs.c
@@ -9,7 +9,10 @@
 #include <linux/debugfs.h>
 #include <linux/kfifo.h>
 #include <linux/wait.h>
+#include <linux/sched/signal.h>
+#include <sound/soc.h>
 #include "avs.h"
+#include "messages.h"
 
 static unsigned int __kfifo_fromio(struct kfifo *fifo, const void __iomem *src, unsigned int len)
 {
@@ -44,3 +47,326 @@ void avs_dump_fw_log_wakeup(struct avs_dev *adev, const void __iomem *src, unsig
 	avs_dump_fw_log(adev, src, len);
 	wake_up(&adev->trace_waitq);
 }
+
+static ssize_t probe_points_read(struct file *file, char __user *to, size_t count, loff_t *ppos)
+{
+	struct avs_dev *adev = file->private_data;
+	struct avs_probe_point_desc *desc;
+	size_t num_desc, len = 0;
+	char *buf;
+	int i, ret;
+
+	/* Prevent chaining, send and dump IPC value just once. */
+	if (*ppos)
+		return 0;
+
+	buf = kzalloc(PAGE_SIZE, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	ret = avs_ipc_probe_get_points(adev, &desc, &num_desc);
+	if (ret) {
+		ret = AVS_IPC_RET(ret);
+		goto exit;
+	}
+
+	for (i = 0; i < num_desc; i++) {
+		ret = snprintf(buf + len, PAGE_SIZE - len,
+			       "Id: %#010x  Purpose: %d  Node id: %#x\n",
+			       desc[i].id.value, desc[i].purpose, desc[i].node_id.val);
+		if (ret < 0)
+			goto free_desc;
+		len += ret;
+	}
+
+	ret = simple_read_from_buffer(to, count, ppos, buf, len);
+free_desc:
+	kfree(desc);
+exit:
+	kfree(buf);
+	return ret;
+}
+
+static ssize_t probe_points_write(struct file *file, const char __user *from, size_t count,
+				  loff_t *ppos)
+{
+	struct avs_dev *adev = file->private_data;
+	struct avs_probe_point_desc *desc;
+	u32 *array, num_elems;
+	size_t bytes;
+	int ret;
+
+	ret = parse_int_array_user(from, count, (int **)&array);
+	if (ret < 0)
+		return ret;
+
+	num_elems = *array;
+	bytes = sizeof(*array) * num_elems;
+	if (bytes % sizeof(*desc)) {
+		ret = -EINVAL;
+		goto exit;
+	}
+
+	desc = (struct avs_probe_point_desc *)&array[1];
+	ret = avs_ipc_probe_connect_points(adev, desc, bytes / sizeof(*desc));
+	if (ret)
+		ret = AVS_IPC_RET(ret);
+	else
+		ret = count;
+exit:
+	kfree(array);
+	return ret;
+}
+
+static const struct file_operations probe_points_fops = {
+	.open = simple_open,
+	.read = probe_points_read,
+	.write = probe_points_write,
+	.llseek = no_llseek,
+};
+
+static ssize_t probe_points_disconnect_write(struct file *file, const char __user *from,
+					     size_t count, loff_t *ppos)
+{
+	struct avs_dev *adev = file->private_data;
+	union avs_probe_point_id *id;
+	u32 *array, num_elems;
+	size_t bytes;
+	int ret;
+
+	ret = parse_int_array_user(from, count, (int **)&array);
+	if (ret < 0)
+		return ret;
+
+	num_elems = *array;
+	bytes = sizeof(*array) * num_elems;
+	if (bytes % sizeof(*id)) {
+		ret = -EINVAL;
+		goto exit;
+	}
+
+	id = (union avs_probe_point_id *)&array[1];
+	ret = avs_ipc_probe_disconnect_points(adev, id, bytes / sizeof(*id));
+	if (ret)
+		ret = AVS_IPC_RET(ret);
+	else
+		ret = count;
+exit:
+	kfree(array);
+	return ret;
+}
+
+static const struct file_operations probe_points_disconnect_fops = {
+	.open = simple_open,
+	.write = probe_points_disconnect_write,
+	.llseek = default_llseek,
+};
+
+static ssize_t strace_read(struct file *file, char __user *to, size_t count, loff_t *ppos)
+{
+	struct avs_dev *adev = file->private_data;
+	struct kfifo *fifo = &adev->trace_fifo;
+	unsigned int copied;
+
+	if (kfifo_is_empty(fifo)) {
+		DEFINE_WAIT(wait);
+
+		prepare_to_wait(&adev->trace_waitq, &wait, TASK_INTERRUPTIBLE);
+		if (!signal_pending(current))
+			schedule();
+		finish_wait(&adev->trace_waitq, &wait);
+	}
+
+	if (kfifo_to_user(fifo, to, count, &copied))
+		return -EFAULT;
+	*ppos += copied;
+	return copied;
+}
+
+static int strace_open(struct inode *inode, struct file *file)
+{
+	struct avs_dev *adev = inode->i_private;
+	int ret;
+
+	if (kfifo_initialized(&adev->trace_fifo))
+		return -EBUSY;
+
+	ret = kfifo_alloc(&adev->trace_fifo, PAGE_SIZE, GFP_KERNEL);
+	if (ret < 0)
+		return ret;
+
+	file->private_data = adev;
+	return 0;
+}
+
+static int strace_release(struct inode *inode, struct file *file)
+{
+	struct avs_dev *adev = file->private_data;
+	unsigned long flags;
+
+	spin_lock_irqsave(&adev->trace_lock, flags);
+	kfifo_free(&adev->trace_fifo);
+	spin_unlock_irqrestore(&adev->trace_lock, flags);
+
+	return 0;
+}
+
+static const struct file_operations strace_fops = {
+	.llseek = default_llseek,
+	.read = strace_read,
+	.open = strace_open,
+	.release = strace_release,
+};
+
+#define DISABLE_TIMERS	UINT_MAX
+
+static int enable_logs(struct avs_dev *adev, u32 resource_mask, u32 *priorities)
+{
+	int ret;
+
+	/* Logging demands D0i0 state from DSP. */
+	if (!adev->logged_resources) {
+		pm_runtime_get_sync(adev->dev);
+
+		ret = avs_dsp_disable_d0ix(adev);
+		if (ret)
+			goto err_d0ix;
+	}
+
+	ret = avs_ipc_set_system_time(adev);
+	if (ret && ret != AVS_IPC_NOT_SUPPORTED) {
+		ret = AVS_IPC_RET(ret);
+		goto err_ipc;
+	}
+
+	ret = avs_dsp_op(adev, enable_logs, AVS_LOG_ENABLE, adev->aging_timer_period,
+			 adev->fifo_full_timer_period, resource_mask, priorities);
+	if (ret)
+		goto err_ipc;
+
+	adev->logged_resources |= resource_mask;
+	return 0;
+
+err_ipc:
+	if (!adev->logged_resources) {
+		avs_dsp_enable_d0ix(adev);
+err_d0ix:
+		pm_runtime_mark_last_busy(adev->dev);
+		pm_runtime_put_autosuspend(adev->dev);
+	}
+
+	return ret;
+}
+
+static int disable_logs(struct avs_dev *adev, u32 resource_mask)
+{
+	int ret;
+
+	/* Check if there's anything to do. */
+	if (!adev->logged_resources)
+		return 0;
+
+	ret = avs_dsp_op(adev, enable_logs, AVS_LOG_DISABLE, DISABLE_TIMERS, DISABLE_TIMERS,
+			 resource_mask, NULL);
+
+	/*
+	 * If IPC fails causing recovery, logged_resources is already zero
+	 * so unsetting bits is still safe.
+	 */
+	adev->logged_resources &= ~resource_mask;
+
+	/* If that's the last resource, allow for D3. */
+	if (!adev->logged_resources) {
+		avs_dsp_enable_d0ix(adev);
+		pm_runtime_mark_last_busy(adev->dev);
+		pm_runtime_put_autosuspend(adev->dev);
+	}
+
+	return ret;
+}
+
+static ssize_t trace_control_read(struct file *file, char __user *to, size_t count, loff_t *ppos)
+{
+	struct avs_dev *adev = file->private_data;
+	char buf[64];
+	int len;
+
+	len = snprintf(buf, sizeof(buf), "0x%08x\n", adev->logged_resources);
+
+	return simple_read_from_buffer(to, count, ppos, buf, len);
+}
+
+static ssize_t trace_control_write(struct file *file, const char __user *from, size_t count,
+				   loff_t *ppos)
+{
+	struct avs_dev *adev = file->private_data;
+	u32 *array, num_elems;
+	u32 resource_mask;
+	int ret;
+
+	ret = parse_int_array_user(from, count, (int **)&array);
+	if (ret < 0)
+		return ret;
+
+	num_elems = *array;
+	resource_mask = array[1];
+
+	/*
+	 * Disable if just resource mask is provided - no log priority flags.
+	 *
+	 * Enable input format:   mask, prio1, .., prioN
+	 * Where 'N' equals number of bits set in the 'mask'.
+	 */
+	if (num_elems == 1) {
+		ret = disable_logs(adev, resource_mask);
+	} else {
+		if (num_elems != (hweight_long(resource_mask) + 1)) {
+			ret = -EINVAL;
+			goto free_array;
+		}
+
+		ret = enable_logs(adev, resource_mask, &array[2]);
+	}
+
+	if (!ret)
+		ret = count;
+free_array:
+	kfree(array);
+	return ret;
+}
+
+static const struct file_operations trace_control_fops = {
+	.llseek = default_llseek,
+	.read = trace_control_read,
+	.write = trace_control_write,
+	.open = simple_open,
+};
+
+void avs_debugfs_init(struct avs_dev *adev)
+{
+	init_waitqueue_head(&adev->trace_waitq);
+	spin_lock_init(&adev->trace_lock);
+
+	adev->debugfs_root = debugfs_create_dir("avs", snd_soc_debugfs_root);
+
+	/* Initialize timer periods with recommended defaults. */
+	adev->aging_timer_period = 10;
+	adev->fifo_full_timer_period = 10;
+
+	debugfs_create_file("strace", 0444, adev->debugfs_root, adev, &strace_fops);
+	debugfs_create_file("trace_control", 0644, adev->debugfs_root, adev, &trace_control_fops);
+
+	debugfs_create_u32("trace_aging_period", 0644, adev->debugfs_root,
+			   &adev->aging_timer_period);
+	debugfs_create_u32("trace_fifo_full_period", 0644, adev->debugfs_root,
+			   &adev->fifo_full_timer_period);
+
+	debugfs_create_file("probe_points", 0644, adev->debugfs_root, adev, &probe_points_fops);
+	debugfs_create_file("probe_points_disconnect", 0200, adev->debugfs_root, adev,
+			    &probe_points_disconnect_fops);
+}
+
+void avs_debugfs_exit(struct avs_dev *adev)
+{
+	debugfs_remove_recursive(adev->debugfs_root);
+}
-- 
2.25.1

[PATCH v2 14/16] ASoC: Intel: avs: Gather remaining logs on strace_release()

[Cezary Rojewski]

When user closes the tracer, some logs may still remain in the tail of
the buffer as firmware sends LOG_BUFFER_STATUS notification only when
certain threshold of data is reached. Add whatever is left to already
gathered logs so no information is lost.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
---
 sound/soc/intel/avs/debugfs.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/sound/soc/intel/avs/debugfs.c b/sound/soc/intel/avs/debugfs.c
index 678572ee6b9d..e7b0b99824aa 100644
--- a/sound/soc/intel/avs/debugfs.c
+++ b/sound/soc/intel/avs/debugfs.c
@@ -201,11 +201,25 @@ static int strace_open(struct inode *inode, struct file *file)
 
 static int strace_release(struct inode *inode, struct file *file)
 {
+	union avs_notify_msg msg = AVS_NOTIFICATION(LOG_BUFFER_STATUS);
 	struct avs_dev *adev = file->private_data;
-	unsigned long flags;
+	unsigned long resource_mask;
+	unsigned long flags, i;
+	u32 num_cores;
+
+	resource_mask = adev->logged_resources;
+	num_cores = adev->hw_cfg.dsp_cores;
 
 	spin_lock_irqsave(&adev->trace_lock, flags);
+
+	/* Gather any remaining logs. */
+	for_each_set_bit(i, &resource_mask, num_cores) {
+		msg.log.core = i;
+		avs_dsp_op(adev, log_buffer_status, &msg);
+	}
+
 	kfifo_free(&adev->trace_fifo);
+
 	spin_unlock_irqrestore(&adev->trace_lock, flags);
 
 	return 0;
-- 
2.25.1

[PATCH v2 15/16] ASoC: Intel: avs: Allow for dumping FW_REGS area

[Cezary Rojewski]

SRAM0 window begins with a block of memory, usually of size PAGE_SIZE,
dedicated to the base firmware registers. When debugging firmware, it is
desirable to be able to dump them at will.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
---
 sound/soc/intel/avs/debugfs.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/sound/soc/intel/avs/debugfs.c b/sound/soc/intel/avs/debugfs.c
index e7b0b99824aa..e9042d4328c4 100644
--- a/sound/soc/intel/avs/debugfs.c
+++ b/sound/soc/intel/avs/debugfs.c
@@ -48,6 +48,29 @@ void avs_dump_fw_log_wakeup(struct avs_dev *adev, const void __iomem *src, unsig
 	wake_up(&adev->trace_waitq);
 }
 
+static ssize_t fw_regs_read(struct file *file, char __user *to, size_t count, loff_t *ppos)
+{
+	struct avs_dev *adev = file->private_data;
+	char *buf;
+	int ret;
+
+	buf = kzalloc(AVS_FW_REGS_SIZE, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	memcpy_fromio(buf, avs_sram_addr(adev, AVS_FW_REGS_WINDOW), AVS_FW_REGS_SIZE);
+
+	ret = simple_read_from_buffer(to, count, ppos, buf, AVS_FW_REGS_SIZE);
+	kfree(buf);
+	return ret;
+}
+
+static const struct file_operations fw_regs_fops = {
+	.open = simple_open,
+	.read = fw_regs_read,
+	.llseek = no_llseek,
+};
+
 static ssize_t probe_points_read(struct file *file, char __user *to, size_t count, loff_t *ppos)
 {
 	struct avs_dev *adev = file->private_data;
@@ -369,6 +392,7 @@ void avs_debugfs_init(struct avs_dev *adev)
 
 	debugfs_create_file("strace", 0444, adev->debugfs_root, adev, &strace_fops);
 	debugfs_create_file("trace_control", 0644, adev->debugfs_root, adev, &trace_control_fops);
+	debugfs_create_file("fw_regs", 0444, adev->debugfs_root, adev, &fw_regs_fops);
 
 	debugfs_create_u32("trace_aging_period", 0644, adev->debugfs_root,
 			   &adev->aging_timer_period);
-- 
2.25.1

[PATCH v2 16/16] ASoC: Intel: avs: Allow for dumping debug window snapshot

[Cezary Rojewski]

Add new read-only debugfs entry which dumps entire content of the SRAM
window 2 i.e.: the debug window.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
---
 sound/soc/intel/avs/debugfs.c   | 26 ++++++++++++++++++++++++++
 sound/soc/intel/avs/registers.h |  3 ++-
 2 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/sound/soc/intel/avs/debugfs.c b/sound/soc/intel/avs/debugfs.c
index e9042d4328c4..bdd388ec01ea 100644
--- a/sound/soc/intel/avs/debugfs.c
+++ b/sound/soc/intel/avs/debugfs.c
@@ -71,6 +71,31 @@ static const struct file_operations fw_regs_fops = {
 	.llseek = no_llseek,
 };
 
+static ssize_t debug_window_read(struct file *file, char __user *to, size_t count, loff_t *ppos)
+{
+	struct avs_dev *adev = file->private_data;
+	size_t size;
+	char *buf;
+	int ret;
+
+	size = adev->hw_cfg.dsp_cores * AVS_WINDOW_CHUNK_SIZE;
+	buf = kzalloc(size, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	memcpy_fromio(buf, avs_sram_addr(adev, AVS_DEBUG_WINDOW), size);
+
+	ret = simple_read_from_buffer(to, count, ppos, buf, size);
+	kfree(buf);
+	return ret;
+}
+
+static const struct file_operations debug_window_fops = {
+	.open = simple_open,
+	.read = debug_window_read,
+	.llseek = no_llseek,
+};
+
 static ssize_t probe_points_read(struct file *file, char __user *to, size_t count, loff_t *ppos)
 {
 	struct avs_dev *adev = file->private_data;
@@ -393,6 +418,7 @@ void avs_debugfs_init(struct avs_dev *adev)
 	debugfs_create_file("strace", 0444, adev->debugfs_root, adev, &strace_fops);
 	debugfs_create_file("trace_control", 0644, adev->debugfs_root, adev, &trace_control_fops);
 	debugfs_create_file("fw_regs", 0444, adev->debugfs_root, adev, &fw_regs_fops);
+	debugfs_create_file("debug_window", 0444, adev->debugfs_root, adev, &debug_window_fops);
 
 	debugfs_create_u32("trace_aging_period", 0644, adev->debugfs_root,
 			   &adev->aging_timer_period);
diff --git a/sound/soc/intel/avs/registers.h b/sound/soc/intel/avs/registers.h
index 95be86148cf3..2b464e466ed5 100644
--- a/sound/soc/intel/avs/registers.h
+++ b/sound/soc/intel/avs/registers.h
@@ -59,7 +59,8 @@
 #define AVS_FW_REG_STATUS(adev)		(AVS_FW_REG_BASE(adev) + 0x0)
 #define AVS_FW_REG_ERROR_CODE(adev)	(AVS_FW_REG_BASE(adev) + 0x4)
 
-#define AVS_FW_REGS_SIZE		PAGE_SIZE
+#define AVS_WINDOW_CHUNK_SIZE		PAGE_SIZE
+#define AVS_FW_REGS_SIZE		AVS_WINDOW_CHUNK_SIZE
 #define AVS_FW_REGS_WINDOW		0
 /* DSP -> HOST communication window */
 #define AVS_UPLINK_WINDOW		AVS_FW_REGS_WINDOW
-- 
2.25.1

Re: [PATCH v2 00/16] ASoC: Intel: avs: Data probing and fw logging

[Mark Brown]

On Fri, 2 Dec 2022 16:28:25 +0100, Cezary Rojewski wrote:
> The patchset focuses on debug functionality for the avs-driver.
> Two major blocks are covered here: data probing and AudioDSP firmware
> logging. Both are configured and controlled through debugfs.
> 
> Data probing is a AudioDSP debug functionality which allows for
> gathering the actual data that is being routed to or from a module.
> Helps in debugging its processing capabilities - navigate to a specific
> module which may have caused a glitch within a pipeline (set of modules
> bound together).
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[01/16] ALSA: hda: Allow for compress stream to hdac_ext_stream assignment
        commit: 97d73d978271ade27fc751ad606f23c1c4c43678
[02/16] ALSA: hda: Prepare for compress stream support
        commit: f6b1254664a0a15c8bbe0a17b2c86840aa38d3d7
[03/16] ALSA: hda: Interrupt servicing and BDL setup for compress streams
        commit: 3e9582267e3a06bfd9622dbd2304a8cfac977b43
[04/16] ASoC: Intel: avs: Introduce avs_log_buffer_status_locked()
        commit: bb03099bf2253fcd1a4d57e6f5ee4e8000911e77
[05/16] ASoC: Intel: avs: Drop fifo_lock
        commit: 58029b7734ec84738aeb8fb391e625832bb6b0a6
[06/16] ASoC: Intel: avs: Introduce debug-context aware helpers
        commit: 9e3c15beb8976771f95ba30b3da8bd35dc7188ac
[07/16] ASoC: Intel: avs: Make enable_logs() dependent on DEBUG_FS
        commit: b3eefa5d8dbfe5286c3308fa706fc9c45b38fe19
[08/16] ASoC: Intel: avs: Drop usage of debug members in non-debug code
        commit: f7de161fc8d5e1ebac3c361a37b1d748e7086330
[09/16] ASoC: Intel: avs: Add data probing requests
        commit: dab8d000e25c3e91154efca287434a4f78ab65d2
[10/16] ASoC: Intel: avs: Probe compress operations
        commit: 700462f55493c6831ad71b209eaebe310dcf11fd
[11/16] ASoC: Intel: avs: Data probing soc-component
        commit: ed914a2a45a45e7d8f900ae8997ca4573792afcc
[12/16] ASoC: Intel: avs: Add probe machine board
        commit: e17527e167ae5bd71fc9cb67da4e73bbb050e6f7
[13/16] ASoC: Intel: avs: Probing and firmware tracing over debugfs
        commit: 5a565ba23abe478f3d4c3b0c8798bcb5215b82f5
[14/16] ASoC: Intel: avs: Gather remaining logs on strace_release()
        commit: 34d27c71707c4ed615105376e0f3907d99b1b271
[15/16] ASoC: Intel: avs: Allow for dumping FW_REGS area
        commit: 870f6e5abba95ac78e750b61cf8f3f15be96796f
[16/16] ASoC: Intel: avs: Allow for dumping debug window snapshot
        commit: 85ac9c8c8eed76e8a320a9e017c6d36e2a52745b

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark