From patchwork Thu Oct 1 05:05:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Ertman, David M" X-Patchwork-Id: 11810883 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CDA7F17CF for ; Thu, 1 Oct 2020 05:06:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BF96D2184D for ; Thu, 1 Oct 2020 05:06:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725921AbgJAFGa (ORCPT ); Thu, 1 Oct 2020 01:06:30 -0400 Received: from mga14.intel.com ([192.55.52.115]:21948 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725878AbgJAFG3 (ORCPT ); Thu, 1 Oct 2020 01:06:29 -0400 IronPort-SDR: D+ahG0jyKzAS6a3IYVUuEtL9Kkvk0bG2SDbg8xLcz/09W9qUAymmXXbzHGKErhDW9X5m5QSnJR pc5furMaYaig== X-IronPort-AV: E=McAfee;i="6000,8403,9760"; a="161876192" X-IronPort-AV: E=Sophos;i="5.77,323,1596524400"; d="scan'208";a="161876192" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Sep 2020 22:06:27 -0700 IronPort-SDR: ShcsxzCh9vA5H8yrsHx/cQ0561n9+PGJQ7k+9g5FiUf2DPHShKpgG2WQtLvFs6NjgMF0kohyyP sQajOGa8t8HQ== X-IronPort-AV: E=Sophos;i="5.77,323,1596524400"; d="scan'208";a="501563200" Received: from dmert-dev.jf.intel.com ([10.166.241.5]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Sep 2020 22:06:27 -0700 From: Dave Ertman To: linux-rdma@vger.kernel.org Subject: [PATCH 2/6] ASoC: SOF: Introduce descriptors for SOF client Date: Wed, 30 Sep 2020 22:05:30 -0700 Message-Id: <20201001050534.890666-3-david.m.ertman@intel.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20201001050534.890666-1-david.m.ertman@intel.com> References: <20201001050534.890666-1-david.m.ertman@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org From: Ranjani Sridharan A client in the SOF (Sound Open Firmware) context is a device that needs to communicate with the DSP via IPC messages. The SOF core is responsible for serializing the IPC messages to the DSP from the different clients. One example of an SOF client would be an IPC test client that floods the DSP with test IPC messages to validate if the serialization works as expected. Multi-client support will also add the ability to split the existing audio cards into multiple ones, so as to e.g. to deal with HDMI with a dedicated client instead of adding HDMI to all cards. This patch introduces descriptors for SOF client driver and SOF client device along with APIs for registering and unregistering a SOF client driver, sending IPCs from a client device and accessing the SOF core debugfs root entry. Along with this, add a couple of new members to struct snd_sof_dev that will be used for maintaining the list of clients. Reviewed-by: Pierre-Louis Bossart Signed-off-by: Ranjani Sridharan Co-developed-by: Fred Oh Signed-off-by: Fred Oh Signed-off-by: Dave Ertman --- sound/soc/sof/Kconfig | 19 ++++++ sound/soc/sof/Makefile | 3 + sound/soc/sof/core.c | 2 + sound/soc/sof/sof-client.c | 117 +++++++++++++++++++++++++++++++++++++ sound/soc/sof/sof-client.h | 65 +++++++++++++++++++++ sound/soc/sof/sof-priv.h | 6 ++ 6 files changed, 212 insertions(+) create mode 100644 sound/soc/sof/sof-client.c create mode 100644 sound/soc/sof/sof-client.h diff --git a/sound/soc/sof/Kconfig b/sound/soc/sof/Kconfig index 4dda4b62509f..cea7efedafef 100644 --- a/sound/soc/sof/Kconfig +++ b/sound/soc/sof/Kconfig @@ -50,6 +50,24 @@ config SND_SOC_SOF_DEBUG_PROBES Say Y if you want to enable probes. If unsure, select "N". +config SND_SOC_SOF_CLIENT + tristate + select ANCILLARY_BUS + help + This option is not user-selectable but automagically handled by + 'select' statements at a higher level + +config SND_SOC_SOF_CLIENT_SUPPORT + bool "SOF enable clients" + depends on SND_SOC_SOF + help + This adds support for ancillary client devices to separate out the debug + functionality for IPC tests, probes etc. into separate devices. This + option would also allow adding client devices based on DSP FW + capabilities and ACPI/OF device information. + Say Y if you want to enable clients with SOF. + If unsure select "N". + config SND_SOC_SOF_DEVELOPER_SUPPORT bool "SOF developer options support" depends on EXPERT @@ -186,6 +204,7 @@ endif ## SND_SOC_SOF_DEVELOPER_SUPPORT config SND_SOC_SOF tristate + select SND_SOC_SOF_CLIENT if SND_SOC_SOF_CLIENT_SUPPORT select SND_SOC_TOPOLOGY select SND_SOC_SOF_NOCODEC if SND_SOC_SOF_NOCODEC_SUPPORT help diff --git a/sound/soc/sof/Makefile b/sound/soc/sof/Makefile index 05718dfe6cd2..5e46f25a3851 100644 --- a/sound/soc/sof/Makefile +++ b/sound/soc/sof/Makefile @@ -2,6 +2,7 @@ snd-sof-objs := core.o ops.o loader.o ipc.o pcm.o pm.o debug.o topology.o\ control.o trace.o utils.o sof-audio.o +snd-sof-client-objs := sof-client.o snd-sof-$(CONFIG_SND_SOC_SOF_DEBUG_PROBES) += probe.o compress.o snd-sof-pci-objs := sof-pci-dev.o @@ -18,6 +19,8 @@ obj-$(CONFIG_SND_SOC_SOF_ACPI) += snd-sof-acpi.o obj-$(CONFIG_SND_SOC_SOF_OF) += snd-sof-of.o obj-$(CONFIG_SND_SOC_SOF_PCI) += snd-sof-pci.o +obj-$(CONFIG_SND_SOC_SOF_CLIENT) += snd-sof-client.o + obj-$(CONFIG_SND_SOC_SOF_INTEL_TOPLEVEL) += intel/ obj-$(CONFIG_SND_SOC_SOF_IMX_TOPLEVEL) += imx/ obj-$(CONFIG_SND_SOC_SOF_XTENSA) += xtensa/ diff --git a/sound/soc/sof/core.c b/sound/soc/sof/core.c index adc7c37145d6..72a97219395f 100644 --- a/sound/soc/sof/core.c +++ b/sound/soc/sof/core.c @@ -314,8 +314,10 @@ int snd_sof_device_probe(struct device *dev, struct snd_sof_pdata *plat_data) INIT_LIST_HEAD(&sdev->widget_list); INIT_LIST_HEAD(&sdev->dai_list); INIT_LIST_HEAD(&sdev->route_list); + INIT_LIST_HEAD(&sdev->client_list); spin_lock_init(&sdev->ipc_lock); spin_lock_init(&sdev->hw_lock); + mutex_init(&sdev->client_mutex); if (IS_ENABLED(CONFIG_SND_SOC_SOF_PROBE_WORK_QUEUE)) INIT_WORK(&sdev->probe_work, sof_probe_work); diff --git a/sound/soc/sof/sof-client.c b/sound/soc/sof/sof-client.c new file mode 100644 index 000000000000..f7e476d99ff6 --- /dev/null +++ b/sound/soc/sof/sof-client.c @@ -0,0 +1,117 @@ +// SPDX-License-Identifier: GPL-2.0-only +// +// Copyright(c) 2020 Intel Corporation. All rights reserved. +// +// Author: Ranjani Sridharan +// + +#include +#include +#include +#include +#include +#include +#include "sof-client.h" +#include "sof-priv.h" + +static void sof_client_ancildev_release(struct device *dev) +{ + struct ancillary_device *ancildev = to_ancillary_dev(dev); + struct sof_client_dev *cdev = ancillary_dev_to_sof_client_dev(ancildev); + + ida_simple_remove(cdev->client_ida, ancildev->id); + kfree(cdev); +} + +static struct sof_client_dev *sof_client_dev_alloc(struct snd_sof_dev *sdev, const char *name, + struct ida *client_ida) +{ + struct sof_client_dev *cdev; + struct ancillary_device *ancildev; + int ret; + + cdev = kzalloc(sizeof(*cdev), GFP_KERNEL); + if (!cdev) + return NULL; + + cdev->sdev = sdev; + cdev->client_ida = client_ida; + ancildev = &cdev->ancildev; + ancildev->name = name; + ancildev->dev.parent = sdev->dev; + ancildev->dev.release = sof_client_ancildev_release; + + ancildev->id = ida_alloc(client_ida, GFP_KERNEL); + if (ancildev->id < 0) { + dev_err(sdev->dev, "error: get IDA idx for ancillary device %s failed\n", name); + ret = ancildev->id; + goto err_free; + } + + ret = ancillary_device_initialize(ancildev); + if (ret < 0) { + dev_err(sdev->dev, "error: failed to initialize client dev %s\n", name); + ida_simple_remove(client_ida, ancildev->id); + goto err_free; + } + + return cdev; + +err_free: + kfree(cdev); + return NULL; +} + +int sof_client_dev_register(struct snd_sof_dev *sdev, const char *name, struct ida *client_ida) +{ + struct sof_client_dev *cdev; + int ret; + + cdev = sof_client_dev_alloc(sdev, name, client_ida); + if (!cdev) + return -ENODEV; + + ret = ancillary_device_add(&cdev->ancildev); + if (ret < 0) { + dev_err(sdev->dev, "error: failed to add client dev %s\n", name); + put_device(&cdev->ancildev.dev); + return ret; + } + + /* add to list of SOF client devices */ + mutex_lock(&sdev->client_mutex); + list_add(&cdev->list, &sdev->client_list); + mutex_unlock(&sdev->client_mutex); + + return ret; +} +EXPORT_SYMBOL_NS_GPL(sof_client_dev_register, SND_SOC_SOF_CLIENT); + +void sof_client_dev_unregister(struct sof_client_dev *cdev) +{ + struct snd_sof_dev *sdev = cdev->sdev; + + /* remove from list of SOF client devices */ + mutex_lock(&sdev->client_mutex); + list_del(&cdev->list); + mutex_unlock(&sdev->client_mutex); + + ancillary_device_unregister(&cdev->ancildev); +} +EXPORT_SYMBOL_NS_GPL(sof_client_dev_unregister, SND_SOC_SOF_CLIENT); + +int sof_client_ipc_tx_message(struct sof_client_dev *cdev, u32 header, void *msg_data, + size_t msg_bytes, void *reply_data, size_t reply_bytes) +{ + return sof_ipc_tx_message(cdev->sdev->ipc, header, msg_data, msg_bytes, + reply_data, reply_bytes); +} +EXPORT_SYMBOL_NS_GPL(sof_client_ipc_tx_message, SND_SOC_SOF_CLIENT); + +struct dentry *sof_client_get_debugfs_root(struct sof_client_dev *cdev) +{ + return cdev->sdev->debugfs_root; +} +EXPORT_SYMBOL_NS_GPL(sof_client_get_debugfs_root, SND_SOC_SOF_CLIENT); + +MODULE_LICENSE("GPL"); diff --git a/sound/soc/sof/sof-client.h b/sound/soc/sof/sof-client.h new file mode 100644 index 000000000000..62212f69c236 --- /dev/null +++ b/sound/soc/sof/sof-client.h @@ -0,0 +1,65 @@ +/* SPDX-License-Identifier: (GPL-2.0-only) */ + +#ifndef __SOUND_SOC_SOF_CLIENT_H +#define __SOUND_SOC_SOF_CLIENT_H + +#include + +#define SOF_CLIENT_PROBE_TIMEOUT_MS 2000 + +struct snd_sof_dev; + +/* SOF client device */ +struct sof_client_dev { + struct ancillary_device ancildev; + struct snd_sof_dev *sdev; + struct list_head list; /* item in SOF core client dev list */ + struct ida *client_ida; + void *data; +}; + +/* client-specific ops, all optional */ +struct sof_client_ops { + int (*client_ipc_rx)(struct sof_client_dev *cdev, u32 msg_cmd); +}; + +struct sof_client_drv { + const char *name; + const struct sof_client_ops ops; + struct ancillary_driver ancillary_drv; +}; + +#define ancillary_dev_to_sof_client_dev(ancillary_dev) \ + container_of(ancillary_dev, struct sof_client_dev, ancildev) + +static inline int sof_client_drv_register(struct sof_client_drv *drv) +{ + return ancillary_driver_register(&drv->ancillary_drv); +} + +static inline void sof_client_drv_unregister(struct sof_client_drv *drv) +{ + ancillary_driver_unregister(&drv->ancillary_drv); +} + +int sof_client_dev_register(struct snd_sof_dev *sdev, const char *name, struct ida *client_ida); +void sof_client_dev_unregister(struct sof_client_dev *cdev); + +int sof_client_ipc_tx_message(struct sof_client_dev *cdev, u32 header, void *msg_data, + size_t msg_bytes, void *reply_data, size_t reply_bytes); + +struct dentry *sof_client_get_debugfs_root(struct sof_client_dev *cdev); + +/** + * module_sof_client_driver() - Helper macro for registering an SOF Client + * driver + * @__sof_client_driver: SOF client driver struct + * + * Helper macro for SOF client drivers which do not do anything special in + * module init/exit. This eliminates a lot of boilerplate. Each module may only + * use this macro once, and calling it replaces module_init() and module_exit() + */ +#define module_sof_client_driver(__sof_client_driver) \ + module_driver(__sof_client_driver, sof_client_drv_register, sof_client_drv_unregister) + +#endif diff --git a/sound/soc/sof/sof-priv.h b/sound/soc/sof/sof-priv.h index 64f28e082049..043fcec5a288 100644 --- a/sound/soc/sof/sof-priv.h +++ b/sound/soc/sof/sof-priv.h @@ -438,6 +438,12 @@ struct snd_sof_dev { bool msi_enabled; + /* list of client devices */ + struct list_head client_list; + + /* mutex to protect client list */ + struct mutex client_mutex; + void *private; /* core does not touch this */ };