msm: adsprpc: Expose remote cdsp status (cb5c1649) · Commits · e / devices / android_kernel_fairphone_FP5

drivers/char/adsprpc.c

+93 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0-only
		/*
		* Copyright (c) 2012-2021, The Linux Foundation. All rights reserved.
		* Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
		*/

		/* Uncomment this block to log an error on every VERIFY failure */
		@@ -529,6 +530,8 @@ struct fastrpc_apps {
		struct hlist_head drivers;
		spinlock_t hlock;
		struct device *dev;
		/* Indicates fastrpc device node info */
		struct device *dev_fastrpc;
		unsigned int latency;
		int rpmsg_register;
		bool legacy_remote_heap;
		@@ -547,6 +550,8 @@ struct fastrpc_apps {
		void *ramdump_handle;
		bool enable_ramdump;
		struct mutex mut_uid;
		/* Indicates cdsp device status */
		int remote_cdsp_status;
		};

		struct fastrpc_mmap {
		@@ -2972,6 +2977,39 @@ static int fastrpc_invoke_send(struct smq_invoke_ctx *ctx,
		return err;
		}

		/*
		* name : fastrpc_get_dsp_status
		* @in : pointer to fastrpc_apps
		* @out : void
		* Description : This function reads the property
		* string from device node and updates the cdsp device
		* avialbility status if the node belongs to cdsp device.
		*/

		static void fastrpc_get_dsp_status(struct fastrpc_apps *me)
		{
		int ret = -1;
		struct device_node *node = NULL;
		const char *name = NULL;

		do {
		node = of_find_compatible_node(node, NULL, "qcom,pil-tz-generic");
		if (node) {
		ret = of_property_read_string(node, "qcom,firmware-name", &name);
		if (!strcmp(name, "cdsp")) {
		ret = of_device_is_available(node);
		me->remote_cdsp_status = ret;
		ADSPRPC_INFO("adsprpc: %s: cdsp node found with ret:%x\n",
		__func__, ret);
		break;
		}
		} else {
		ADSPRPC_ERR("adsprpc: Error: %s: cdsp node not found\n", __func__);
		break;
		}
		} while (1);
		}

		static void fastrpc_init(struct fastrpc_apps *me)
		{
		int i;
		@@ -6683,6 +6721,52 @@ static int fastrpc_setup_service_locator(struct device *dev,
		return err;
		}

		/*
		* name : remote_cdsp_status_show
		* @in : dev : pointer to device node
		* attr: pointer to device attribute
		* @out : buf : Contains remote cdsp status
		* @Description : This function updates the buf with
		* remote cdsp status by reading the fastrpc node
		* @returns : bytes written to buf
		*/

		static ssize_t remote_cdsp_status_show(struct device *dev,
		struct device_attribute attr, char buf)
		{
		struct fastrpc_apps *me = &gfa;

		/*
		* Default remote DSP status: 0
		* driver possibly not probed yet or not the main device.
		*/

		if (!dev \|\| !dev->driver \|\|
		!of_device_is_compatible(dev->of_node, "qcom,msm-fastrpc-compute")) {
		ADSPRPC_ERR(
		"adsprpc: Error: %s: driver not probed yet or not the main device\n",
		__func__);
		return 0;
		}

		return scnprintf(buf, PAGE_SIZE, "%d",
		me->remote_cdsp_status);
		}

		/* Remote cdsp status attribute declartion as read only */
		static DEVICE_ATTR_RO(remote_cdsp_status);

		/* Declaring attribute for remote dsp */
		static struct attribute *msm_remote_dsp_attrs[] = {
		&dev_attr_remote_cdsp_status.attr,
		NULL
		};

		/* Defining remote dsp attributes in attributes group */
		static struct attribute_group msm_remote_dsp_attr_group = {
		.attrs = msm_remote_dsp_attrs,
		};

		static int fastrpc_probe(struct platform_device *pdev)
		{
		int err = 0;
		@@ -6693,6 +6777,14 @@ static int fastrpc_probe(struct platform_device *pdev)

		if (of_device_is_compatible(dev->of_node,
		"qcom,msm-fastrpc-compute")) {
		me->dev_fastrpc = dev;
		err = sysfs_create_group(&pdev->dev.kobj, &msm_remote_dsp_attr_group);
		if (err) {
		ADSPRPC_ERR(
		"adsprpc: Error: %s: initialization of sysfs create group failed with %d\n",
		__func__, err);
		goto bail;
		}
		init_secure_vmid_list(dev, "qcom,adsp-remoteheap-vmid",
		&gcinfo[0].rhvm);
		fastrpc_init_privileged_gids(dev, "qcom,fastrpc-gids",
		@@ -6814,6 +6906,7 @@ static int __init fastrpc_device_init(void)
		}
		memset(me, 0, sizeof(*me));
		fastrpc_init(me);
		fastrpc_get_dsp_status(me);
		me->dev = NULL;
		me->legacy_remote_heap = false;
		VERIFY(err, 0 == platform_driver_register(&fastrpc_driver));