1 files changed, 72 insertions, 97 deletions

diff --git a/sound/firewire/fireface/ff-pcm.c b/sound/firewire/fireface/ff-pcm.c
index d0bc96b20a65..7ad8204fbfe8 100644
--- a/sound/firewire/fireface/ff-pcm.c
+++ b/sound/firewire/fireface/ff-pcm.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * ff-pcm.c - a part of driver for RME Fireface series
  *
  * Copyright (c) 2015-2017 Takashi Sakamoto
- *
- * Licensed under the terms of the GNU General Public License, version 2.
  */
 
 #include "ff.h"
@@ -140,6 +139,7 @@ static int pcm_init_hw_params(struct snd_ff *ff,
 static int pcm_open(struct snd_pcm_substream *substream)
 {
 	struct snd_ff *ff = substream->private_data;
+	struct amdtp_domain *d = &ff->domain;
 	unsigned int rate;
 	enum snd_ff_clock_src src;
 	int i, err;
@@ -152,32 +152,50 @@ static int pcm_open(struct snd_pcm_substream *substream)
 	if (err < 0)
 		goto release_lock;
 
-	err = snd_ff_transaction_get_clock(ff, &rate, &src);
+	err = ff->spec->protocol->get_clock(ff, &rate, &src);
 	if (err < 0)
 		goto release_lock;
 
-	if (src != SND_FF_CLOCK_SRC_INTERNAL) {
-		for (i = 0; i < CIP_SFC_COUNT; ++i) {
-			if (amdtp_rate_table[i] == rate)
-				break;
-		}
-		/*
-		 * The unit is configured at sampling frequency which packet
-		 * streaming engine can't support.
-		 */
-		if (i >= CIP_SFC_COUNT) {
-			err = -EIO;
-			goto release_lock;
-		}
+	scoped_guard(mutex, &ff->mutex) {
+		// When source of clock is not internal or any stream is reserved for
+		// transmission of PCM frames, the available sampling rate is limited
+		// at current one.
+		if (src != SND_FF_CLOCK_SRC_INTERNAL) {
+			for (i = 0; i < CIP_SFC_COUNT; ++i) {
+				if (amdtp_rate_table[i] == rate)
+					break;
+			}
+
+			// The unit is configured at sampling frequency which packet
+			// streaming engine can't support.
+			if (i >= CIP_SFC_COUNT) {
+				err = -EIO;
+				goto release_lock;
+			}
 
-		substream->runtime->hw.rate_min = rate;
-		substream->runtime->hw.rate_max = rate;
-	} else {
-		if (amdtp_stream_pcm_running(&ff->rx_stream) ||
-		    amdtp_stream_pcm_running(&ff->tx_stream)) {
-			rate = amdtp_rate_table[ff->rx_stream.sfc];
 			substream->runtime->hw.rate_min = rate;
 			substream->runtime->hw.rate_max = rate;
+		} else {
+			if (ff->substreams_counter > 0) {
+				unsigned int frames_per_period = d->events_per_period;
+				unsigned int frames_per_buffer = d->events_per_buffer;
+
+				rate = amdtp_rate_table[ff->rx_stream.sfc];
+				substream->runtime->hw.rate_min = rate;
+				substream->runtime->hw.rate_max = rate;
+
+				err = snd_pcm_hw_constraint_minmax(substream->runtime,
+								   SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
+								   frames_per_period, frames_per_period);
+				if (err < 0)
+					goto release_lock;
+
+				err = snd_pcm_hw_constraint_minmax(substream->runtime,
+								   SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
+								   frames_per_buffer, frames_per_buffer);
+				if (err < 0)
+					goto release_lock;
+			}
 		}
 	}
 
@@ -199,76 +217,39 @@ static int pcm_close(struct snd_pcm_substream *substream)
 	return 0;
 }
 
-static int pcm_capture_hw_params(struct snd_pcm_substream *substream,
-				 struct snd_pcm_hw_params *hw_params)
+static int pcm_hw_params(struct snd_pcm_substream *substream,
+			 struct snd_pcm_hw_params *hw_params)
 {
 	struct snd_ff *ff = substream->private_data;
-	int err;
-
-	err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
-					       params_buffer_bytes(hw_params));
-	if (err < 0)
-		return err;
-
-	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
-		mutex_lock(&ff->mutex);
-		ff->substreams_counter++;
-		mutex_unlock(&ff->mutex);
+	int err = 0;
+
+	if (substream->runtime->state == SNDRV_PCM_STATE_OPEN) {
+		unsigned int rate = params_rate(hw_params);
+		unsigned int frames_per_period = params_period_size(hw_params);
+		unsigned int frames_per_buffer = params_buffer_size(hw_params);
+
+		guard(mutex)(&ff->mutex);
+		err = snd_ff_stream_reserve_duplex(ff, rate, frames_per_period,
+						   frames_per_buffer);
+		if (err >= 0)
+			++ff->substreams_counter;
 	}
 
-	return 0;
-}
-
-static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
-				  struct snd_pcm_hw_params *hw_params)
-{
-	struct snd_ff *ff = substream->private_data;
-	int err;
-
-	err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
-					       params_buffer_bytes(hw_params));
-	if (err < 0)
-		return err;
-
-	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
-		mutex_lock(&ff->mutex);
-		ff->substreams_counter++;
-		mutex_unlock(&ff->mutex);
-	}
-
-	return 0;
-}
-
-static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
-{
-	struct snd_ff *ff = substream->private_data;
-
-	mutex_lock(&ff->mutex);
-
-	if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
-		ff->substreams_counter--;
-
-	snd_ff_stream_stop_duplex(ff);
-
-	mutex_unlock(&ff->mutex);
-
-	return snd_pcm_lib_free_vmalloc_buffer(substream);
+	return err;
 }
 
-static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
+static int pcm_hw_free(struct snd_pcm_substream *substream)
 {
 	struct snd_ff *ff = substream->private_data;
 
-	mutex_lock(&ff->mutex);
+	guard(mutex)(&ff->mutex);
 
-	if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
-		ff->substreams_counter--;
+	if (substream->runtime->state != SNDRV_PCM_STATE_OPEN)
+		--ff->substreams_counter;
 
 	snd_ff_stream_stop_duplex(ff);
 
-	mutex_unlock(&ff->mutex);
-
-	return snd_pcm_lib_free_vmalloc_buffer(substream);
+	return 0;
 }
 
 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
@@ -277,14 +258,12 @@ static int pcm_capture_prepare(struct snd_pcm_substream *substream)
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	int err;
 
-	mutex_lock(&ff->mutex);
+	guard(mutex)(&ff->mutex);
 
 	err = snd_ff_stream_start_duplex(ff, runtime->rate);
 	if (err >= 0)
 		amdtp_stream_pcm_prepare(&ff->tx_stream);
 
-	mutex_unlock(&ff->mutex);
-
 	return err;
 }
 
@@ -294,14 +273,12 @@ static int pcm_playback_prepare(struct snd_pcm_substream *substream)
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	int err;
 
-	mutex_lock(&ff->mutex);
+	guard(mutex)(&ff->mutex);
 
 	err = snd_ff_stream_start_duplex(ff, runtime->rate);
 	if (err >= 0)
 		amdtp_stream_pcm_prepare(&ff->rx_stream);
 
-	mutex_unlock(&ff->mutex);
-
 	return err;
 }
 
@@ -345,28 +322,28 @@ static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
 {
 	struct snd_ff *ff = sbstrm->private_data;
 
-	return amdtp_stream_pcm_pointer(&ff->tx_stream);
+	return amdtp_domain_stream_pcm_pointer(&ff->domain, &ff->tx_stream);
 }
 
 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
 {
 	struct snd_ff *ff = sbstrm->private_data;
 
-	return amdtp_stream_pcm_pointer(&ff->rx_stream);
+	return amdtp_domain_stream_pcm_pointer(&ff->domain, &ff->rx_stream);
 }
 
 static int pcm_capture_ack(struct snd_pcm_substream *substream)
 {
 	struct snd_ff *ff = substream->private_data;
 
-	return amdtp_stream_pcm_ack(&ff->tx_stream);
+	return amdtp_domain_stream_pcm_ack(&ff->domain, &ff->tx_stream);
 }
 
 static int pcm_playback_ack(struct snd_pcm_substream *substream)
 {
 	struct snd_ff *ff = substream->private_data;
 
-	return amdtp_stream_pcm_ack(&ff->rx_stream);
+	return amdtp_domain_stream_pcm_ack(&ff->domain, &ff->rx_stream);
 }
 
 int snd_ff_create_pcm_devices(struct snd_ff *ff)
@@ -374,26 +351,22 @@ int snd_ff_create_pcm_devices(struct snd_ff *ff)
 	static const struct snd_pcm_ops pcm_capture_ops = {
 		.open		= pcm_open,
 		.close		= pcm_close,
-		.ioctl		= snd_pcm_lib_ioctl,
-		.hw_params	= pcm_capture_hw_params,
-		.hw_free	= pcm_capture_hw_free,
+		.hw_params	= pcm_hw_params,
+		.hw_free	= pcm_hw_free,
 		.prepare	= pcm_capture_prepare,
 		.trigger	= pcm_capture_trigger,
 		.pointer	= pcm_capture_pointer,
 		.ack		= pcm_capture_ack,
-		.page		= snd_pcm_lib_get_vmalloc_page,
 	};
 	static const struct snd_pcm_ops pcm_playback_ops = {
 		.open		= pcm_open,
 		.close		= pcm_close,
-		.ioctl		= snd_pcm_lib_ioctl,
-		.hw_params	= pcm_playback_hw_params,
-		.hw_free	= pcm_playback_hw_free,
+		.hw_params	= pcm_hw_params,
+		.hw_free	= pcm_hw_free,
 		.prepare	= pcm_playback_prepare,
 		.trigger	= pcm_playback_trigger,
 		.pointer	= pcm_playback_pointer,
 		.ack		= pcm_playback_ack,
-		.page		= snd_pcm_lib_get_vmalloc_page,
 	};
 	struct snd_pcm *pcm;
 	int err;
@@ -403,10 +376,12 @@ int snd_ff_create_pcm_devices(struct snd_ff *ff)
 		return err;
 
 	pcm->private_data = ff;
+	pcm->nonatomic = true;
 	snprintf(pcm->name, sizeof(pcm->name),
 		 "%s PCM", ff->card->shortname);
 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pcm_playback_ops);
 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_capture_ops);
+	snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0);
 
 	return 0;
 }