1 files changed, 376 insertions, 0 deletions
diff --git a/drivers/staging/dream/smd/smd_rpcrouter_device.c b/drivers/staging/dream/smd/smd_rpcrouter_device.c
new file mode 100644
index 000000000000..cd3910bcc4ed
--- /dev/null
+++ b/drivers/staging/dream/smd/smd_rpcrouter_device.c
@@ -0,0 +1,376 @@
+/* arch/arm/mach-msm/smd_rpcrouter_device.c
+ *
+ * Copyright (C) 2007 Google, Inc.
+ * Copyright (c) 2007-2009 QUALCOMM Incorporated.
+ * Author: San Mehat <san@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
+ * GNU General Public License for more details.
+ *
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/cdev.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/fs.h>
+#include <linux/err.h>
+#include <linux/sched.h>
+#include <linux/poll.h>
+#include <linux/platform_device.h>
+#include <linux/msm_rpcrouter.h>
+
+#include <asm/uaccess.h>
+#include <asm/byteorder.h>
+
+#include "smd_rpcrouter.h"
+
+#define SAFETY_MEM_SIZE 65536
+
+/* Next minor # available for a remote server */
+static int next_minor = 1;
+
+struct class *msm_rpcrouter_class;
+dev_t msm_rpcrouter_devno;
+
+static struct cdev rpcrouter_cdev;
+static struct device *rpcrouter_device;
+
+static int rpcrouter_open(struct inode *inode, struct file *filp)
+{
+	int rc;
+	struct msm_rpc_endpoint *ept;
+
+	rc = nonseekable_open(inode, filp);
+	if (rc < 0)
+		return rc;
+
+	ept = msm_rpcrouter_create_local_endpoint(inode->i_rdev);
+	if (!ept)
+		return -ENOMEM;
+
+	filp->private_data = ept;
+	return 0;
+}
+
+static int rpcrouter_release(struct inode *inode, struct file *filp)
+{
+	struct msm_rpc_endpoint *ept;
+	ept = (struct msm_rpc_endpoint *) filp->private_data;
+
+	return msm_rpcrouter_destroy_local_endpoint(ept);
+}
+
+static ssize_t rpcrouter_read(struct file *filp, char __user *buf,
+			      size_t count, loff_t *ppos)
+{
+	struct msm_rpc_endpoint *ept;
+	struct rr_fragment *frag, *next;
+	int rc;
+
+	ept = (struct msm_rpc_endpoint *) filp->private_data;
+
+	rc = __msm_rpc_read(ept, &frag, count, -1);
+	if (rc < 0)
+		return rc;
+
+	count = rc;
+
+	while (frag != NULL) {
+		if (copy_to_user(buf, frag->data, frag->length)) {
+			printk(KERN_ERR
+			       "rpcrouter: could not copy all read data to user!\n");
+			rc = -EFAULT;
+		}
+		buf += frag->length;
+		next = frag->next;
+		kfree(frag);
+		frag = next;
+	}
+
+	return rc;
+}
+
+static ssize_t rpcrouter_write(struct file *filp, const char __user *buf,
+				size_t count, loff_t *ppos)
+{
+	struct msm_rpc_endpoint	*ept;
+	int rc = 0;
+	void *k_buffer;
+
+	ept = (struct msm_rpc_endpoint *) filp->private_data;
+
+	/* A check for safety, this seems non-standard */
+	if (count > SAFETY_MEM_SIZE)
+		return -EINVAL;
+
+	k_buffer = kmalloc(count, GFP_KERNEL);
+	if (!k_buffer)
+		return -ENOMEM;
+
+	if (copy_from_user(k_buffer, buf, count)) {
+		rc = -EFAULT;
+		goto write_out_free;
+	}
+
+	rc = msm_rpc_write(ept, k_buffer, count);
+	if (rc < 0)
+		goto write_out_free;
+
+	rc = count;
+write_out_free:
+	kfree(k_buffer);
+	return rc;
+}
+
+static unsigned int rpcrouter_poll(struct file *filp,
+				   struct poll_table_struct *wait)
+{
+	struct msm_rpc_endpoint *ept;
+	unsigned mask = 0;
+	ept = (struct msm_rpc_endpoint *) filp->private_data;
+
+	/* If there's data already in the read queue, return POLLIN.
+	 * Else, wait for the requested amount of time, and check again.
+	 */
+
+	if (!list_empty(&ept->read_q))
+		mask |= POLLIN;
+
+	if (!mask) {
+		poll_wait(filp, &ept->wait_q, wait);
+		if (!list_empty(&ept->read_q))
+			mask |= POLLIN;
+	}
+
+	return mask;
+}
+
+static long rpcrouter_ioctl(struct file *filp, unsigned int cmd,
+			    unsigned long arg)
+{
+	struct msm_rpc_endpoint *ept;
+	struct rpcrouter_ioctl_server_args server_args;
+	int rc = 0;
+	uint32_t n;
+
+	ept = (struct msm_rpc_endpoint *) filp->private_data;
+	switch (cmd) {
+
+	case RPC_ROUTER_IOCTL_GET_VERSION:
+		n = RPC_ROUTER_VERSION_V1;
+		rc = put_user(n, (unsigned int *) arg);
+		break;
+
+	case RPC_ROUTER_IOCTL_GET_MTU:
+		/* the pacmark word reduces the actual payload
+		 * possible per message
+		 */
+		n = RPCROUTER_MSGSIZE_MAX - sizeof(uint32_t);
+		rc = put_user(n, (unsigned int *) arg);
+		break;
+
+	case RPC_ROUTER_IOCTL_REGISTER_SERVER:
+		rc = copy_from_user(&server_args, (void *) arg,
+				    sizeof(server_args));
+		if (rc < 0)
+			break;
+		msm_rpc_register_server(ept,
+					server_args.prog,
+					server_args.vers);
+		break;
+
+	case RPC_ROUTER_IOCTL_UNREGISTER_SERVER:
+		rc = copy_from_user(&server_args, (void *) arg,
+				    sizeof(server_args));
+		if (rc < 0)
+			break;
+
+		msm_rpc_unregister_server(ept,
+					  server_args.prog,
+					  server_args.vers);
+		break;
+
+	case RPC_ROUTER_IOCTL_GET_MINOR_VERSION:
+		n = MSM_RPC_GET_MINOR(msm_rpc_get_vers(ept));
+		rc = put_user(n, (unsigned int *)arg);
+		break;
+
+	default:
+		rc = -EINVAL;
+		break;
+	}
+
+	return rc;
+}
+
+static struct file_operations rpcrouter_server_fops = {
+	.owner	 = THIS_MODULE,
+	.open	 = rpcrouter_open,
+	.release = rpcrouter_release,
+	.read	 = rpcrouter_read,
+	.write	 = rpcrouter_write,
+	.poll    = rpcrouter_poll,
+	.unlocked_ioctl	 = rpcrouter_ioctl,
+};
+
+static struct file_operations rpcrouter_router_fops = {
+	.owner	 = THIS_MODULE,
+	.open	 = rpcrouter_open,
+	.release = rpcrouter_release,
+	.read	 = rpcrouter_read,
+	.write	 = rpcrouter_write,
+	.poll    = rpcrouter_poll,
+	.unlocked_ioctl = rpcrouter_ioctl,
+};
+
+int msm_rpcrouter_create_server_cdev(struct rr_server *server)
+{
+	int rc;
+	uint32_t dev_vers;
+
+	if (next_minor == RPCROUTER_MAX_REMOTE_SERVERS) {
+		printk(KERN_ERR
+		       "rpcrouter: Minor numbers exhausted - Increase "
+		       "RPCROUTER_MAX_REMOTE_SERVERS\n");
+		return -ENOBUFS;
+	}
+
+#if CONFIG_MSM_AMSS_VERSION >= 6350
+	/* Servers with bit 31 set are remote msm servers with hashkey version.
+	 * Servers with bit 31 not set are remote msm servers with
+	 * backwards compatible version type in which case the minor number
+	 * (lower 16 bits) is set to zero.
+	 *
+	 */
+	if ((server->vers & RPC_VERSION_MODE_MASK))
+		dev_vers = server->vers;
+	else
+		dev_vers = server->vers & RPC_VERSION_MAJOR_MASK;
+#else
+	dev_vers = server->vers;
+#endif
+
+	server->device_number =
+		MKDEV(MAJOR(msm_rpcrouter_devno), next_minor++);
+
+	server->device =
+		device_create(msm_rpcrouter_class, rpcrouter_device,
+			      server->device_number, NULL, "%.8x:%.8x",
+			      server->prog, dev_vers);
+	if (IS_ERR(server->device)) {
+		printk(KERN_ERR
+		       "rpcrouter: Unable to create device (%ld)\n",
+		       PTR_ERR(server->device));
+		return PTR_ERR(server->device);;
+	}
+
+	cdev_init(&server->cdev, &rpcrouter_server_fops);
+	server->cdev.owner = THIS_MODULE;
+
+	rc = cdev_add(&server->cdev, server->device_number, 1);
+	if (rc < 0) {
+		printk(KERN_ERR
+		       "rpcrouter: Unable to add chrdev (%d)\n", rc);
+		device_destroy(msm_rpcrouter_class, server->device_number);
+		return rc;
+	}
+	return 0;
+}
+
+/* for backward compatible version type (31st bit cleared)
+ * clearing minor number (lower 16 bits) in device name
+ * is neccessary for driver binding
+ */
+int msm_rpcrouter_create_server_pdev(struct rr_server *server)
+{
+	sprintf(server->pdev_name, "rs%.8x:%.8x",
+		server->prog,
+#if CONFIG_MSM_AMSS_VERSION >= 6350
+		(server->vers & RPC_VERSION_MODE_MASK) ? server->vers :
+		(server->vers & RPC_VERSION_MAJOR_MASK));
+#else
+		server->vers);
+#endif
+
+	server->p_device.base.id = -1;
+	server->p_device.base.name = server->pdev_name;
+
+	server->p_device.prog = server->prog;
+	server->p_device.vers = server->vers;
+
+	platform_device_register(&server->p_device.base);
+	return 0;
+}
+
+int msm_rpcrouter_init_devices(void)
+{
+	int rc;
+	int major;
+
+	/* Create the device nodes */
+	msm_rpcrouter_class = class_create(THIS_MODULE, "oncrpc");
+	if (IS_ERR(msm_rpcrouter_class)) {
+		rc = -ENOMEM;
+		printk(KERN_ERR
+		       "rpcrouter: failed to create oncrpc class\n");
+		goto fail;
+	}
+
+	rc = alloc_chrdev_region(&msm_rpcrouter_devno, 0,
+				 RPCROUTER_MAX_REMOTE_SERVERS + 1,
+				 "oncrpc");
+	if (rc < 0) {
+		printk(KERN_ERR
+		       "rpcrouter: Failed to alloc chardev region (%d)\n", rc);
+		goto fail_destroy_class;
+	}
+
+	major = MAJOR(msm_rpcrouter_devno);
+	rpcrouter_device = device_create(msm_rpcrouter_class, NULL,
+					 msm_rpcrouter_devno, NULL, "%.8x:%d",
+					 0, 0);
+	if (IS_ERR(rpcrouter_device)) {
+		rc = -ENOMEM;
+		goto fail_unregister_cdev_region;
+	}
+
+	cdev_init(&rpcrouter_cdev, &rpcrouter_router_fops);
+	rpcrouter_cdev.owner = THIS_MODULE;
+
+	rc = cdev_add(&rpcrouter_cdev, msm_rpcrouter_devno, 1);
+	if (rc < 0)
+		goto fail_destroy_device;
+
+	return 0;
+
+fail_destroy_device:
+	device_destroy(msm_rpcrouter_class, msm_rpcrouter_devno);
+fail_unregister_cdev_region:
+	unregister_chrdev_region(msm_rpcrouter_devno,
+				 RPCROUTER_MAX_REMOTE_SERVERS + 1);
+fail_destroy_class:
+	class_destroy(msm_rpcrouter_class);
+fail:
+	return rc;
+}
+
+void msm_rpcrouter_exit_devices(void)
+{
+	cdev_del(&rpcrouter_cdev);
+	device_destroy(msm_rpcrouter_class, msm_rpcrouter_devno);
+	unregister_chrdev_region(msm_rpcrouter_devno,
+				 RPCROUTER_MAX_REMOTE_SERVERS + 1);
+	class_destroy(msm_rpcrouter_class);
+}
+