[PATCH v2 5/6] ASoC: SOF: Intel: Define ops for client registration

[Dave Ertman <david.m.ertman@intel.com>]

From: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

Define client ops for Intel platforms. For now, we only add
2 IPC test clients that will be used for run tandem IPC flood
tests for.

For ACPI platforms, change the Kconfig to select
SND_SOC_SOF_PROBE_WORK_QUEUE to allow the ancillary driver
to probe when the client is registered.

Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Co-developed-by: Fred Oh <fred.oh@linux.intel.com>
Signed-off-by: Fred Oh <fred.oh@linux.intel.com>
Signed-off-by: Dave Ertman <david.m.ertman@intel.com>
---
 sound/soc/sof/intel/Kconfig        |  9 +++++
 sound/soc/sof/intel/Makefile       |  3 ++
 sound/soc/sof/intel/apl.c          | 18 ++++++++++
 sound/soc/sof/intel/bdw.c          | 18 ++++++++++
 sound/soc/sof/intel/byt.c          | 22 +++++++++++++
 sound/soc/sof/intel/cnl.c          | 18 ++++++++++
 sound/soc/sof/intel/intel-client.c | 53 ++++++++++++++++++++++++++++++
 sound/soc/sof/intel/intel-client.h | 26 +++++++++++++++
 8 files changed, 167 insertions(+)
 create mode 100644 sound/soc/sof/intel/intel-client.c
 create mode 100644 sound/soc/sof/intel/intel-client.h

diff --git a/sound/soc/sof/intel/Kconfig b/sound/soc/sof/intel/Kconfig
index 3aaf25e4f766..28aba42f4658 100644
--- a/sound/soc/sof/intel/Kconfig
+++ b/sound/soc/sof/intel/Kconfig
@@ -13,6 +13,8 @@ config SND_SOC_SOF_INTEL_ACPI
 	def_tristate SND_SOC_SOF_ACPI
 	select SND_SOC_SOF_BAYTRAIL  if SND_SOC_SOF_BAYTRAIL_SUPPORT
 	select SND_SOC_SOF_BROADWELL if SND_SOC_SOF_BROADWELL_SUPPORT
+	select SND_SOC_SOF_PROBE_WORK_QUEUE if SND_SOC_SOF_CLIENT
+	select SND_SOC_SOF_INTEL_CLIENT if SND_SOC_SOF_CLIENT
 	help
 	  This option is not user-selectable but automagically handled by
 	  'select' statements at a higher level
@@ -29,6 +31,7 @@ config SND_SOC_SOF_INTEL_PCI
 	select SND_SOC_SOF_TIGERLAKE   if SND_SOC_SOF_TIGERLAKE_SUPPORT
 	select SND_SOC_SOF_ELKHARTLAKE if SND_SOC_SOF_ELKHARTLAKE_SUPPORT
 	select SND_SOC_SOF_JASPERLAKE  if SND_SOC_SOF_JASPERLAKE_SUPPORT
+	select SND_SOC_SOF_INTEL_CLIENT if SND_SOC_SOF_CLIENT
 	help
 	  This option is not user-selectable but automagically handled by
 	  'select' statements at a higher level
@@ -57,6 +60,12 @@ config SND_SOC_SOF_INTEL_COMMON
 	  This option is not user-selectable but automagically handled by
 	  'select' statements at a higher level
 
+config SND_SOC_SOF_INTEL_CLIENT
+	tristate
+	help
+	  This option is not user-selectable but automagically handled by
+	  'select' statements at a higher level
+
 if SND_SOC_SOF_INTEL_ACPI
 
 config SND_SOC_SOF_BAYTRAIL_SUPPORT
diff --git a/sound/soc/sof/intel/Makefile b/sound/soc/sof/intel/Makefile
index f7e9358f1f06..50e40caaa787 100644
--- a/sound/soc/sof/intel/Makefile
+++ b/sound/soc/sof/intel/Makefile
@@ -5,6 +5,8 @@ snd-sof-intel-bdw-objs := bdw.o
 
 snd-sof-intel-ipc-objs := intel-ipc.o
 
+snd-sof-intel-client-objs := intel-client.o
+
 snd-sof-intel-hda-common-objs := hda.o hda-loader.o hda-stream.o hda-trace.o \
 				 hda-dsp.o hda-ipc.o hda-ctrl.o hda-pcm.o \
 				 hda-dai.o hda-bus.o \
@@ -18,3 +20,4 @@ obj-$(CONFIG_SND_SOC_SOF_BROADWELL) += snd-sof-intel-bdw.o
 obj-$(CONFIG_SND_SOC_SOF_INTEL_HIFI_EP_IPC) += snd-sof-intel-ipc.o
 obj-$(CONFIG_SND_SOC_SOF_HDA_COMMON) += snd-sof-intel-hda-common.o
 obj-$(CONFIG_SND_SOC_SOF_HDA) += snd-sof-intel-hda.o
+obj-$(CONFIG_SND_SOC_SOF_INTEL_CLIENT) += snd-sof-intel-client.o
diff --git a/sound/soc/sof/intel/apl.c b/sound/soc/sof/intel/apl.c
index 9e29d4fd393a..b31353b1a3ea 100644
--- a/sound/soc/sof/intel/apl.c
+++ b/sound/soc/sof/intel/apl.c
@@ -15,9 +15,12 @@
  * Hardware interface for audio DSP on Apollolake and GeminiLake
  */
 
+#include <linux/list.h>
 #include "../sof-priv.h"
 #include "hda.h"
 #include "../sof-audio.h"
+#include "../sof-client.h"
+#include "intel-client.h"
 
 static const struct snd_sof_debugfs_map apl_dsp_debugfs[] = {
 	{"hda", HDA_DSP_HDA_BAR, 0, 0x4000, SOF_DEBUGFS_ACCESS_ALWAYS},
@@ -25,6 +28,16 @@ static const struct snd_sof_debugfs_map apl_dsp_debugfs[] = {
 	{"dsp", HDA_DSP_BAR,  0, 0x10000, SOF_DEBUGFS_ACCESS_ALWAYS},
 };
 
+static int apl_register_clients(struct snd_sof_dev *sdev)
+{
+	return intel_register_ipc_test_clients(sdev);
+}
+
+static void apl_unregister_clients(struct snd_sof_dev *sdev)
+{
+	intel_unregister_ipc_test_clients(sdev);
+}
+
 /* apollolake ops */
 const struct snd_sof_dsp_ops sof_apl_ops = {
 	/* probe and remove */
@@ -101,6 +114,10 @@ const struct snd_sof_dsp_ops sof_apl_ops = {
 	.trace_release = hda_dsp_trace_release,
 	.trace_trigger = hda_dsp_trace_trigger,
 
+	/* client ops */
+	.register_clients = apl_register_clients,
+	.unregister_clients = apl_unregister_clients,
+
 	/* DAI drivers */
 	.drv		= skl_dai,
 	.num_drv	= SOF_SKL_NUM_DAIS,
@@ -140,3 +157,4 @@ const struct sof_intel_dsp_desc apl_chip_info = {
 	.ssp_base_offset = APL_SSP_BASE_OFFSET,
 };
 EXPORT_SYMBOL_NS(apl_chip_info, SND_SOC_SOF_INTEL_HDA_COMMON);
+MODULE_IMPORT_NS(SND_SOC_SOF_INTEL_CLIENT);
diff --git a/sound/soc/sof/intel/bdw.c b/sound/soc/sof/intel/bdw.c
index 99fd0bd7276e..b14026c5fa97 100644
--- a/sound/soc/sof/intel/bdw.c
+++ b/sound/soc/sof/intel/bdw.c
@@ -12,12 +12,15 @@
  * Hardware interface for audio DSP on Broadwell
  */
 
+#include <linux/list.h>
 #include <linux/module.h>
 #include <sound/sof.h>
 #include <sound/sof/xtensa.h>
 #include "../ops.h"
 #include "shim.h"
 #include "../sof-audio.h"
+#include "../sof-client.h"
+#include "intel-client.h"
 
 /* BARs */
 #define BDW_DSP_BAR 0
@@ -563,6 +566,16 @@ static void bdw_set_mach_params(const struct snd_soc_acpi_mach *mach,
 	mach_params->platform = dev_name(dev);
 }
 
+static int bdw_register_clients(struct snd_sof_dev *sdev)
+{
+	return intel_register_ipc_test_clients(sdev);
+}
+
+static void bdw_unregister_clients(struct snd_sof_dev *sdev)
+{
+	intel_unregister_ipc_test_clients(sdev);
+}
+
 /* Broadwell DAIs */
 static struct snd_soc_dai_driver bdw_dai[] = {
 {
@@ -638,6 +651,10 @@ const struct snd_sof_dsp_ops sof_bdw_ops = {
 	/*Firmware loading */
 	.load_firmware	= snd_sof_load_firmware_memcpy,
 
+	/* client ops */
+	.register_clients = bdw_register_clients,
+	.unregister_clients = bdw_unregister_clients,
+
 	/* DAI drivers */
 	.drv = bdw_dai,
 	.num_drv = ARRAY_SIZE(bdw_dai),
@@ -662,3 +679,4 @@ EXPORT_SYMBOL_NS(bdw_chip_info, SND_SOC_SOF_BROADWELL);
 MODULE_LICENSE("Dual BSD/GPL");
 MODULE_IMPORT_NS(SND_SOC_SOF_INTEL_HIFI_EP_IPC);
 MODULE_IMPORT_NS(SND_SOC_SOF_XTENSA);
+MODULE_IMPORT_NS(SND_SOC_SOF_INTEL_CLIENT);
diff --git a/sound/soc/sof/intel/byt.c b/sound/soc/sof/intel/byt.c
index 49f67f1b94e0..8951f756d078 100644
--- a/sound/soc/sof/intel/byt.c
+++ b/sound/soc/sof/intel/byt.c
@@ -12,13 +12,16 @@
  * Hardware interface for audio DSP on Baytrail, Braswell and Cherrytrail.
  */
 
+#include <linux/list.h>
 #include <linux/module.h>
 #include <sound/sof.h>
 #include <sound/sof/xtensa.h>
 #include "../ops.h"
 #include "shim.h"
 #include "../sof-audio.h"
+#include "../sof-client.h"
 #include "../../intel/common/soc-intel-quirks.h"
+#include "intel-client.h"
 
 /* DSP memories */
 #define IRAM_OFFSET		0x0C0000
@@ -821,6 +824,16 @@ static int byt_acpi_probe(struct snd_sof_dev *sdev)
 	return ret;
 }
 
+static int byt_register_clients(struct snd_sof_dev *sdev)
+{
+	return intel_register_ipc_test_clients(sdev);
+}
+
+static void byt_unregister_clients(struct snd_sof_dev *sdev)
+{
+	intel_unregister_ipc_test_clients(sdev);
+}
+
 /* baytrail ops */
 const struct snd_sof_dsp_ops sof_byt_ops = {
 	/* device init */
@@ -879,6 +892,10 @@ const struct snd_sof_dsp_ops sof_byt_ops = {
 	.suspend = byt_suspend,
 	.resume = byt_resume,
 
+	/* client ops */
+	.register_clients = byt_register_clients,
+	.unregister_clients = byt_unregister_clients,
+
 	/* DAI drivers */
 	.drv = byt_dai,
 	.num_drv = 3, /* we have only 3 SSPs on byt*/
@@ -958,6 +975,10 @@ const struct snd_sof_dsp_ops sof_cht_ops = {
 	.suspend = byt_suspend,
 	.resume = byt_resume,
 
+	/* client ops */
+	.register_clients = byt_register_clients,
+	.unregister_clients = byt_unregister_clients,
+
 	/* DAI drivers */
 	.drv = byt_dai,
 	/* all 6 SSPs may be available for cherrytrail */
@@ -985,3 +1006,4 @@ EXPORT_SYMBOL_NS(cht_chip_info, SND_SOC_SOF_BAYTRAIL);
 MODULE_LICENSE("Dual BSD/GPL");
 MODULE_IMPORT_NS(SND_SOC_SOF_INTEL_HIFI_EP_IPC);
 MODULE_IMPORT_NS(SND_SOC_SOF_XTENSA);
+MODULE_IMPORT_NS(SND_SOC_SOF_INTEL_CLIENT);
diff --git a/sound/soc/sof/intel/cnl.c b/sound/soc/sof/intel/cnl.c
index 16db0f50d139..5d7c2a667798 100644
--- a/sound/soc/sof/intel/cnl.c
+++ b/sound/soc/sof/intel/cnl.c
@@ -15,10 +15,13 @@
  * Hardware interface for audio DSP on Cannonlake.
  */
 
+#include <linux/list.h>
 #include "../ops.h"
 #include "hda.h"
 #include "hda-ipc.h"
 #include "../sof-audio.h"
+#include "../sof-client.h"
+#include "intel-client.h"
 
 static const struct snd_sof_debugfs_map cnl_dsp_debugfs[] = {
 	{"hda", HDA_DSP_HDA_BAR, 0, 0x4000, SOF_DEBUGFS_ACCESS_ALWAYS},
@@ -231,6 +234,16 @@ static void cnl_ipc_dump(struct snd_sof_dev *sdev)
 		hipcida, hipctdr, hipcctl);
 }
 
+static int cnl_register_clients(struct snd_sof_dev *sdev)
+{
+	return intel_register_ipc_test_clients(sdev);
+}
+
+static void cnl_unregister_clients(struct snd_sof_dev *sdev)
+{
+	intel_unregister_ipc_test_clients(sdev);
+}
+
 /* cannonlake ops */
 const struct snd_sof_dsp_ops sof_cnl_ops = {
 	/* probe and remove */
@@ -307,6 +320,10 @@ const struct snd_sof_dsp_ops sof_cnl_ops = {
 	.trace_release = hda_dsp_trace_release,
 	.trace_trigger = hda_dsp_trace_trigger,
 
+	/* client ops */
+	.register_clients = cnl_register_clients,
+	.unregister_clients = cnl_unregister_clients,
+
 	/* DAI drivers */
 	.drv		= skl_dai,
 	.num_drv	= SOF_SKL_NUM_DAIS,
@@ -417,3 +434,4 @@ const struct sof_intel_dsp_desc jsl_chip_info = {
 	.ssp_base_offset = CNL_SSP_BASE_OFFSET,
 };
 EXPORT_SYMBOL_NS(jsl_chip_info, SND_SOC_SOF_INTEL_HDA_COMMON);
+MODULE_IMPORT_NS(SND_SOC_SOF_INTEL_CLIENT);
diff --git a/sound/soc/sof/intel/intel-client.c b/sound/soc/sof/intel/intel-client.c
new file mode 100644
index 000000000000..eecab96f1089
--- /dev/null
+++ b/sound/soc/sof/intel/intel-client.c
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// Copyright(c) 2020 Intel Corporation. All rights reserved.
+//
+// Author: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
+//
+
+#include <linux/module.h>
+#include "../sof-priv.h"
+#include "../sof-client.h"
+#include "intel-client.h"
+
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_IPC_FLOOD_TEST_CLIENT)
+DEFINE_IDA(sof_ipc_test_client_ida);
+
+int intel_register_ipc_test_clients(struct snd_sof_dev *sdev)
+{
+	int ret;
+
+	/*
+	 * Register 2 IPC clients to facilitate tandem flood test. The device name below is
+	 * appended with the device ID assigned automatically when the ancillary device is
+	 * registered making them unique.
+	 */
+	ret = sof_client_dev_register(sdev, "ipc_test", &sof_ipc_test_client_ida);
+	if (ret < 0)
+		return ret;
+
+	return sof_client_dev_register(sdev, "ipc_test", &sof_ipc_test_client_ida);
+}
+EXPORT_SYMBOL_NS_GPL(intel_register_ipc_test_clients, SND_SOC_SOF_INTEL_CLIENT);
+
+void intel_unregister_ipc_test_clients(struct snd_sof_dev *sdev)
+{
+	struct sof_client_dev *cdev, *_cdev;
+
+	mutex_lock(&sdev->client_mutex);
+
+	/* unregister ipc_test clients */
+	list_for_each_entry_safe(cdev, _cdev, &sdev->client_list, list) {
+		if (!strcmp(cdev->ancildev.name, "ipc_test"))
+			sof_client_dev_unregister(cdev);
+	}
+
+	mutex_unlock(&sdev->client_mutex);
+
+	ida_destroy(&sof_ipc_test_client_ida);
+}
+EXPORT_SYMBOL_NS_GPL(intel_unregister_ipc_test_clients, SND_SOC_SOF_INTEL_CLIENT);
+#endif
+
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(SND_SOC_SOF_CLIENT);
diff --git a/sound/soc/sof/intel/intel-client.h b/sound/soc/sof/intel/intel-client.h
new file mode 100644
index 000000000000..49b2c6c0dcc4
--- /dev/null
+++ b/sound/soc/sof/intel/intel-client.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
+/*
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * Copyright(c) 2020 Intel Corporation. All rights reserved.
+ *
+ * Author: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
+ */
+
+#ifndef __INTEL_CLIENT_H
+#define __INTEL_CLIENT_H
+
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_IPC_FLOOD_TEST_CLIENT)
+int intel_register_ipc_test_clients(struct snd_sof_dev *sdev);
+void intel_unregister_ipc_test_clients(struct snd_sof_dev *sdev);
+#else
+static inline int intel_register_ipc_test_clients(struct snd_sof_dev *sdev)
+{
+	return 0;
+}
+
+static void intel_unregister_ipc_test_clients(struct snd_sof_dev *sdev) {}
+#endif
+
+#endif
-- 
2.26.2