ASoC: Intel: avs: Add data probing requests

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>
Link: https://lore.kernel.org/r/20221202152841.672536-10-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 46 insertions, 0 deletions

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);
+}