Merge "msm: adsprpc: DSP device node to provide restricted access to ADSP/SLPI" (c4fb218c) · Commits · e / devices / android_kernel_sony_msm8998

Documentation/devicetree/bindings/qdsp/msm-fastrpc.txt

+1 −0

Original line number	Diff line number	Diff line
		@@ -13,6 +13,7 @@ Optional properties:
		- qcom,fastrpc-glink: Flag to use glink instead of smd for IPC
		- qcom,fastrpc-vmid-heap-shared: Flag for Dynamic heap feature, to
		share HLOS memory buffer to ADSP
		- qcom,secure-domains: FastRPC secure domain configuration

		Optional subnodes:
		- qcom,msm_fastrpc_compute_cb : Child nodes representing the compute context

drivers/char/adsprpc.c

+117 −8

Original line number	Diff line number	Diff line
		/*
		* Copyright (c) 2012-2019, The Linux Foundation. All rights reserved.
		* Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 and
		@@ -72,6 +72,16 @@
		#define FASTRPC_CTX_MAGIC (0xbeeddeed)
		#define FASTRPC_CTX_MAX (256)
		#define FASTRPC_CTXID_MASK (0xFF0)
		#define NUM_DEVICES 2 /* adsprpc-smd, adsprpc-smd-secure */
		#define MINOR_NUM_DEV 0
		#define MINOR_NUM_SECURE_DEV 1
		#define NON_SECURE_CHANNEL 0
		#define SECURE_CHANNEL 1

		#define ADSP_DOMAIN_ID (0)
		#define MDSP_DOMAIN_ID (1)
		#define SDSP_DOMAIN_ID (2)
		#define CDSP_DOMAIN_ID (3)

		#define IS_CACHE_ALIGNED(x) (((x) & ((L1_CACHE_BYTES)-1)) == 0)

		@@ -245,6 +255,8 @@ struct fastrpc_channel_ctx {
		int ramdumpenabled;
		void *remoteheap_ramdump_dev;
		struct fastrpc_glink_info link;
		/* Indicates, if channel is restricted to secure node only */
		int secure;
		};

		struct fastrpc_apps {
		@@ -321,6 +333,8 @@ struct fastrpc_file {
		struct dentry *debugfs_file;
		struct mutex map_mutex;
		char *debug_buf;
		/* Identifies the device (MINOR_NUM_DEV / MINOR_NUM_SECURE_DEV) */
		int dev_minor;
		};

		static struct fastrpc_apps gfa;
		@@ -1683,7 +1697,11 @@ static void fastrpc_init(struct fastrpc_apps *me)
		init_completion(&me->channel[i].work);
		init_completion(&me->channel[i].workport);
		me->channel[i].sesscount = 0;
		/* All channels are secure by default except CDSP */
		me->channel[i].secure = SECURE_CHANNEL;
		}
		/* Set CDSP channel to non secure */
		me->channel[CDSP_DOMAIN_ID].secure = NON_SECURE_CHANNEL;
		}

		static int fastrpc_release_current_dsp_process(struct fastrpc_file *fl);
		@@ -2725,6 +2743,9 @@ static ssize_t fastrpc_debugfs_read(struct file filp, char __user buffer,
		len += scnprintf(fileinfo + len,
		DEBUGFS_SIZE - len, "\|%-9d",
		chan->ssrcount);
		len += scnprintf(fileinfo + len,
		DEBUGFS_SIZE - len, "%s %d\n",
		"secure:", chan->secure);
		for (j = 0; j < chan->sesscount; j++) {
		sess_used += chan->session[j].used;
		}
		@@ -2818,6 +2839,9 @@ static ssize_t fastrpc_debugfs_read(struct file filp, char __user buffer,
		"0x%-20lX\|0x%-20llX\|0x%-20zu\n\n",
		map->va, map->phys,
		map->size);
		len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len,
		"%s %d\n\n",
		"DEV_MINOR:", fl->dev_minor);
		}
		len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len,
		"%-20s\|%-20s\|%-20s\|%-20s\n",
		@@ -2974,6 +2998,19 @@ static int fastrpc_device_open(struct inode inode, struct file filp)
		char strpid[PID_SIZE];
		int buf_size = 0;

		/*
		* Indicates the device node opened
		* MINOR_NUM_DEV or MINOR_NUM_SECURE_DEV
		*/
		int dev_minor = MINOR(inode->i_rdev);

		VERIFY(err, ((dev_minor == MINOR_NUM_DEV) \|\|
		(dev_minor == MINOR_NUM_SECURE_DEV)));
		if (err) {
		pr_err("adsprpc: Invalid dev minor num %d\n", dev_minor);
		return err;
		}

		VERIFY(err, NULL != (fl = kzalloc(sizeof(*fl), GFP_KERNEL)));
		if (err)
		return err;
		@@ -3000,6 +3037,7 @@ static int fastrpc_device_open(struct inode inode, struct file filp)
		fl->mode = FASTRPC_MODE_SERIAL;
		fl->cid = -1;
		fl->init_mem = NULL;
		fl->dev_minor = dev_minor;

		if (debugfs_file != NULL)
		fl->debugfs_file = debugfs_file;
		@@ -3025,6 +3063,23 @@ static int fastrpc_get_info(struct fastrpc_file fl, uint32_t info)
		VERIFY(err, cid < NUM_CHANNELS);
		if (err)
		goto bail;
		/* Check to see if the device node is non-secure */
		if (fl->dev_minor == MINOR_NUM_DEV) {
		/*
		* For non secure device node check and make sure that
		* the channel allows non-secure access
		* If not, bail. Session will not start.
		* cid will remain -1 and client will not be able to
		* invoke any other methods without failure
		*/
		if (fl->apps->channel[cid].secure == SECURE_CHANNEL) {
		err = -EPERM;
		pr_err("adsprpc: GetInfo failed dev %d, cid %d, secure %d\n",
		fl->dev_minor, cid,
		fl->apps->channel[cid].secure);
		goto bail;
		}
		}
		fl->cid = cid;
		fl->ssrcount = fl->apps->channel[cid].ssrcount;
		VERIFY(err, !fastrpc_session_alloc_locked(
		@@ -3462,12 +3517,41 @@ bail:
		return err;
		}

		static void configure_secure_channels(uint32_t secure_domains)
		{
		struct fastrpc_apps *me = &gfa;
		int ii = 0;
		/*
		* secure_domains contains the bitmask of the secure channels
		* Bit 0 - ADSP
		* Bit 1 - MDSP
		* Bit 2 - SLPI
		* Bit 3 - CDSP
		*/
		for (ii = ADSP_DOMAIN_ID; ii <= CDSP_DOMAIN_ID; ++ii) {
		int secure = (secure_domains >> ii) & 0x01;

		me->channel[ii].secure = secure;
		}
		}

		static int fastrpc_probe(struct platform_device *pdev)
		{
		int err = 0;
		struct fastrpc_apps *me = &gfa;
		struct device *dev = &pdev->dev;

		uint32_t secure_domains;

		if (of_get_property(dev->of_node,
		"qcom,secure-domains", NULL) != NULL) {
		VERIFY(err, !of_property_read_u32(dev->of_node,
		"qcom,secure-domains",
		&secure_domains));
		if (!err)
		configure_secure_channels(secure_domains);
		else
		pr_info("adsprpc: unable to read the domain configuration from dts\n");
		}
		if (of_device_is_compatible(dev->of_node,
		"qcom,msm-fastrpc-compute-cb"))
		return fastrpc_cb_probe(dev);
		@@ -3543,6 +3627,7 @@ static int __init fastrpc_device_init(void)
		{
		struct fastrpc_apps *me = &gfa;
		struct device *dev = NULL;
		struct device *secure_dev = NULL;
		int err = 0, i;

		debugfs_root = debugfs_create_dir("adsprpc", NULL);
		@@ -3559,7 +3644,7 @@ static int __init fastrpc_device_init(void)
		cdev_init(&me->cdev, &fops);
		me->cdev.owner = THIS_MODULE;
		VERIFY(err, 0 == cdev_add(&me->cdev, MKDEV(MAJOR(me->dev_no), 0),
		1));
		NUM_DEVICES));
		if (err)
		goto cdev_init_bail;
		me->class = class_create(THIS_MODULE, "fastrpc");
		@@ -3567,13 +3652,28 @@ static int __init fastrpc_device_init(void)
		if (err)
		goto class_create_bail;
		me->compat = (NULL == fops.compat_ioctl) ? 0 : 1;
		/*
		* Create devices and register with sysfs
		* Create first device with minor number 0
		*/
		dev = device_create(me->class, NULL,
		MKDEV(MAJOR(me->dev_no), 0),
		NULL, gcinfo[0].name);
		MKDEV(MAJOR(me->dev_no), MINOR_NUM_DEV),
		NULL, DEVICE_NAME);
		VERIFY(err, !IS_ERR_OR_NULL(dev));
		if (err)
		goto device_create_bail;

		/* Create secure device with minor number for secure device */
		secure_dev = device_create(me->class, NULL,
		MKDEV(MAJOR(me->dev_no), MINOR_NUM_SECURE_DEV),
		NULL, DEVICE_NAME_SECURE);
		VERIFY(err, !IS_ERR_OR_NULL(secure_dev));
		if (err)
		goto device_create_bail;

		for (i = 0; i < NUM_CHANNELS; i++) {
		me->channel[i].dev = secure_dev;
		if (i == CDSP_DOMAIN_ID)
		me->channel[i].dev = dev;
		me->channel[i].ssrcount = 0;
		me->channel[i].prevssrcount = 0;
		@@ -3598,7 +3698,11 @@ device_create_bail:
		&me->channel[i].nb);
		}
		if (!IS_ERR_OR_NULL(dev))
		device_destroy(me->class, MKDEV(MAJOR(me->dev_no), 0));
		device_destroy(me->class, MKDEV(MAJOR(me->dev_no),
		MINOR_NUM_DEV));
		if (!IS_ERR_OR_NULL(secure_dev))
		device_destroy(me->class, MKDEV(MAJOR(me->dev_no),
		MINOR_NUM_SECURE_DEV));
		class_destroy(me->class);
		class_create_bail:
		cdev_del(&me->cdev);
		@@ -3620,10 +3724,15 @@ static void __exit fastrpc_device_exit(void)
		for (i = 0; i < NUM_CHANNELS; i++) {
		if (!gcinfo[i].name)
		continue;
		device_destroy(me->class, MKDEV(MAJOR(me->dev_no), i));
		subsys_notif_unregister_notifier(me->channel[i].handle,
		&me->channel[i].nb);
		}

		/* Destroy the secure and non secure devices */
		device_destroy(me->class, MKDEV(MAJOR(me->dev_no), MINOR_NUM_DEV));
		device_destroy(me->class, MKDEV(MAJOR(me->dev_no),
		MINOR_NUM_SECURE_DEV));

		class_destroy(me->class);
		cdev_del(&me->cdev);
		unregister_chrdev_region(me->dev_no, NUM_CHANNELS);

drivers/char/adsprpc_shared.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -34,6 +34,7 @@
		#define FASTRPC_GLINK_GUID "fastrpcglink-apps-dsp"
		#define FASTRPC_SMD_GUID "fastrpcsmd-apps-dsp"
		#define DEVICE_NAME "adsprpc-smd"
		#define DEVICE_NAME_SECURE "adsprpc-smd-secure"

		/* Set for buffers that have no virtual mapping in userspace */
		#define FASTRPC_ATTR_NOVA 0x1