diff options
Diffstat (limited to 'drivers/dsp/syslink/procmgr/procmgr_drv.c')
| -rw-r--r-- | drivers/dsp/syslink/procmgr/procmgr_drv.c | 730 |
1 files changed, 730 insertions, 0 deletions
diff --git a/drivers/dsp/syslink/procmgr/procmgr_drv.c b/drivers/dsp/syslink/procmgr/procmgr_drv.c new file mode 100644 index 00000000000..dfcafcda6a6 --- /dev/null +++ b/drivers/dsp/syslink/procmgr/procmgr_drv.c @@ -0,0 +1,730 @@ +/* + * procmgr_drv.c + * + * Syslink driver support functions for TI OMAP processors. + * + * Copyright (C) 2009-2010 Texas Instruments, Inc. + * + * This package is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + + +#include <generated/autoconf.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/cdev.h> +#include <linux/device.h> +#include <linux/fs.h> +#include <linux/mm.h> +#include <linux/slab.h> +#include <linux/uaccess.h> +#include <linux/platform_device.h> + +#include <plat/cpu.h> + +/* Module headers */ +#include <procmgr.h> +#include "procmgr_drvdefs.h" + +#define PROCMGR_NAME "syslink-procmgr" + +static char *driver_name = PROCMGR_NAME; + +static s32 driver_major; + +static s32 driver_minor; + +struct procmgr_dev { + struct cdev cdev; +}; + +static struct platform_device *omap_proc_dev; +static struct platform_device *procmgr_pdev; +static struct procmgr_dev *procmgr_device; + +static struct class *proc_mgr_class; + + +/** ==================================== + * Forward declarations of internal functions + * ==================================== + */ +/* Linux driver function to open the driver object. */ +static int proc_mgr_drv_open(struct inode *inode, struct file *filp); + +/* Linux driver function to close the driver object. */ +static int proc_mgr_drv_release(struct inode *inode, struct file *filp); + +/* Linux driver function to invoke the APIs through ioctl. */ +static long proc_mgr_drv_ioctl(struct file *filp, + unsigned int cmd, + unsigned long args); + +/* Linux driver function to map memory regions to user space. */ +static int proc_mgr_drv_mmap(struct file *filp, struct vm_area_struct *vma); + +/* Module initialization function for Linux driver. */ +static int __init proc_mgr_drv_initialize_module(void); + +/* Module finalization function for Linux driver. */ +static void __exit proc_mgr_drv_finalize_module(void); + +/* Platform driver probe function */ +static int __devinit proc_mgr_probe(struct platform_device *pdev); + +/* Platform driver remove function */ +static int __devexit proc_mgr_remove(struct platform_device *pdev); + +/* + * name DriverOps + * + * desc Function to invoke the APIs through ioctl + * + */ +static const struct file_operations procmgr_fops = { + .open = proc_mgr_drv_open, + .unlocked_ioctl = proc_mgr_drv_ioctl, + .release = proc_mgr_drv_release, + .mmap = proc_mgr_drv_mmap, +} ; + +/* Imtiaz changed places */ +static struct platform_driver procmgr_driver = { + .driver = { + .owner = THIS_MODULE, + .name = PROCMGR_NAME, + }, + .probe = proc_mgr_probe, + .remove = __devexit_p(proc_mgr_remove), + .shutdown = NULL, + .suspend = NULL, + .resume = NULL, +}; + +/* Process Context */ +struct procmgr_process_context { + u32 setup_count; +}; + +/* +* brief Linux specific function to open the driver. + */ +static int proc_mgr_drv_open(struct inode *inode, struct file *filp) +{ + s32 retval = 0; + struct procmgr_process_context *pr_ctxt = NULL; + + pr_ctxt = kzalloc(sizeof(struct procmgr_process_context), GFP_KERNEL); + if (!pr_ctxt) + retval = -ENOMEM; + + filp->private_data = pr_ctxt; + return retval; +} + +/* +* brief Linux driver function to close the driver object. + */ +static int proc_mgr_drv_release(struct inode *inode, struct file *filp) +{ + s32 retval = 0; + struct procmgr_process_context *pr_ctxt; + + if (!filp->private_data) { + retval = -EIO; + goto err; + } + + pr_ctxt = filp->private_data; + while (pr_ctxt->setup_count-- > 0) { + /* Destroy has not been called. Call destroy now. */ + pr_err("proc_mgr_drv_release: " + "proc_mgr_destroy %d\n", pr_ctxt->setup_count); + proc_mgr_destroy(); + } + kfree(pr_ctxt); + + filp->private_data = NULL; +err: + return retval; +} + +/* +* Linux driver function to invoke the APIs through ioctl. + */ +static long proc_mgr_drv_ioctl(struct file *filp, + unsigned int cmd, unsigned long args) +{ + int retval = 0; + struct proc_mgr_cmd_args *cmd_args = (struct proc_mgr_cmd_args *)args; + struct proc_mgr_cmd_args command_args; + struct procmgr_process_context *pr_ctxt = + (struct procmgr_process_context *)filp->private_data; + + switch (cmd) { + case CMD_PROCMGR_GETCONFIG: + { + struct proc_mgr_cmd_args_get_config *src_args = + (struct proc_mgr_cmd_args_get_config *)args; + struct proc_mgr_config cfg; + + /* copy_from_user is not needed for proc_mgr_get_config, + * since the user's config is not used. + */ + proc_mgr_get_config(&cfg); + + retval = copy_to_user((void __user *)(src_args->cfg), + (const void *)&cfg, + sizeof(struct proc_mgr_config)); + + WARN_ON(retval < 0); + } + break; + + case CMD_PROCMGR_SETUP: + { + struct proc_mgr_cmd_args_setup *src_args = + (struct proc_mgr_cmd_args_setup *)args; + struct proc_mgr_config cfg; + + retval = copy_from_user((void *)&cfg, + (const void __user *)(src_args->cfg), + sizeof(struct proc_mgr_config)); + + /* This check is needed at run-time also since it + * depends on run environment. + * It must not be optimized out. + */ + if (WARN_ON(retval != 0)) + goto func_exit; + + retval = proc_mgr_setup(&cfg); + if (retval >= 0) + pr_ctxt->setup_count++; + } + break; + + case CMD_PROCMGR_DESTROY: + { + retval = proc_mgr_destroy(); + pr_ctxt->setup_count--; + WARN_ON(retval < 0); + } + break; + + case CMD_PROCMGR_PARAMS_INIT: + { + struct proc_mgr_cmd_args_params_init src_args; + struct proc_mgr_params params; + + /* Copy the full args from user-side. */ + retval = copy_from_user((void *)&src_args, + (const void __user *)(args), + sizeof(struct proc_mgr_cmd_args_params_init)); + + if (WARN_ON(retval != 0)) + goto func_exit; + + proc_mgr_params_init(src_args.handle, ¶ms); + + /* Copy only the params to user-side */ + retval = copy_to_user((void __user *)(src_args.params), + (const void *)¶ms, + sizeof(struct proc_mgr_params)); + WARN_ON(retval < 0); + } + break; + + case CMD_PROCMGR_CREATE: + { + struct proc_mgr_cmd_args_create src_args; + + /* Copy the full args from user-side. */ + retval = copy_from_user((void *)&src_args, + (const void __user *)(args), + sizeof(struct proc_mgr_cmd_args_create)); + + src_args.handle = proc_mgr_create(src_args.proc_id, + &(src_args.params)); + if (src_args.handle == NULL) { + retval = -EFAULT; + goto func_exit; + } + retval = copy_to_user((void __user *)(args), + (const void *)&src_args, + sizeof(struct proc_mgr_cmd_args_create)); + WARN_ON(retval < 0); + } + break; + + case CMD_PROCMGR_DELETE: + { + struct proc_mgr_cmd_args_delete src_args; + + /* Copy the full args from user-side. */ + retval = copy_from_user((void *)&src_args, + (const void __user *)(args), + sizeof(struct proc_mgr_cmd_args_delete)); + if (WARN_ON(retval != 0)) + goto func_exit; + + retval = proc_mgr_delete(&(src_args.handle)); + } + break; + + case CMD_PROCMGR_OPEN: + { + struct proc_mgr_cmd_args_open src_args; + + /* Copy the full args from user-side. */ + retval = copy_from_user((void *)&src_args, + (const void __user *)(args), + sizeof(struct proc_mgr_cmd_args_open)); + + if (WARN_ON(retval != 0)) + goto func_exit; + retval = proc_mgr_open(&(src_args.handle), + src_args.proc_id); + if (WARN_ON(retval < 0)) + goto func_exit; + retval = proc_mgr_get_proc_info(src_args.handle, + &(src_args.proc_info)); + if (WARN_ON(retval < 0)) + goto func_exit; + retval = copy_to_user((void __user *)(args), + (const void *)&src_args, + sizeof(struct proc_mgr_cmd_args_open)); + WARN_ON(retval); + } + break; + + case CMD_PROCMGR_CLOSE: + { + struct proc_mgr_cmd_args_close src_args; + + /* Copy the full args from user-side. */ + retval = copy_from_user((void *)&src_args, + (const void __user *)(args), + sizeof(struct proc_mgr_cmd_args_close)); + if (WARN_ON(retval != 0)) + goto func_exit; + retval = proc_mgr_close(&(src_args.handle)); + } + break; + + case CMD_PROCMGR_GETATTACHPARAMS: + { + struct proc_mgr_cmd_args_get_attach_params src_args; + struct proc_mgr_attach_params params; + + /* Copy the full args from user-side. */ + retval = copy_from_user((void *)&src_args, + (const void __user *)(args), + sizeof(struct proc_mgr_cmd_args_get_attach_params)); + if (WARN_ON(retval != 0)) + goto func_exit; + proc_mgr_get_attach_params(src_args.handle, ¶ms); + retval = copy_to_user((void __user *)(src_args.params), + (const void *)¶ms, + sizeof(struct proc_mgr_attach_params)); + WARN_ON(retval); + } + break; + + case CMD_PROCMGR_ATTACH: + { + struct proc_mgr_cmd_args_attach src_args; + struct proc_mgr_attach_params params; + + /* Copy the full args from user-side. */ + retval = copy_from_user((void *)&src_args, + (const void __user *)(args), + sizeof(struct proc_mgr_cmd_args_attach)); + if (WARN_ON(retval != 0)) + goto func_exit; + /* Copy params from user-side. */ + retval = copy_from_user((void *)¶ms, + (const void __user *)(src_args.params), + sizeof(struct proc_mgr_attach_params)); + retval = proc_mgr_attach(src_args.handle, ¶ms); + if (WARN_ON(retval < 0)) + goto func_exit; + /* Get memory information. */ + retval = proc_mgr_get_proc_info(src_args.handle, + &(src_args.proc_info)); + if (WARN_ON(retval < 0)) + goto func_exit; + retval = copy_to_user((void __user *)(args), + (const void *)&src_args, + sizeof(struct proc_mgr_cmd_args_attach)); + } + break; + + case CMD_PROCMGR_DETACH: + { + struct proc_mgr_cmd_args_detach src_args; + + /* Copy the full args from user-side. */ + retval = copy_from_user((void *)&src_args, + (const void __user *)(args), + sizeof(struct proc_mgr_cmd_args_detach)); + if (WARN_ON(retval != 0)) + goto func_exit; + retval = proc_mgr_detach(src_args.handle); + if (WARN_ON(retval < 0)) + goto func_exit; + } + break; + + case CMD_PROCMGR_GETSTATE: + { + struct proc_mgr_cmd_args_get_state src_args; + enum proc_mgr_state procmgrstate; + + /* Copy the full args from user-side. */ + retval = copy_from_user((void *)&src_args, + (const __user void *)(args), + sizeof(struct proc_mgr_cmd_args_get_state)); + if (WARN_ON(retval != 0)) + goto func_exit; + procmgrstate = proc_mgr_get_state(src_args.handle); + src_args.proc_mgr_state = procmgrstate; + retval = copy_to_user((void __user *)(args), + (const void *)&src_args, + sizeof(struct proc_mgr_cmd_args_get_state)); + WARN_ON(retval < 0); + } + break; + + case CMD_PROCMGR_READ: + { + struct proc_mgr_cmd_args_read src_args; + + /* Copy the full args from user-side. */ + retval = copy_from_user((void *)&src_args, + (const void __user *)(args), + sizeof(struct proc_mgr_cmd_args_read)); + if (WARN_ON(retval != 0)) + goto func_exit; + retval = proc_mgr_read(src_args.handle, + src_args.proc_addr, &(src_args.num_bytes), + src_args.buffer); + if (WARN_ON(retval < 0)) + goto func_exit; + retval = copy_to_user((void __user *)(args), + (const void *)&src_args, + sizeof(struct proc_mgr_cmd_args_read)); + WARN_ON(retval < 0); + } + break; + + case CMD_PROCMGR_WRITE: + { + struct proc_mgr_cmd_args_write src_args; + + /* Copy the full args from user-side. */ + retval = copy_from_user((void *)&src_args, + (const void __user *)(args), + sizeof(struct proc_mgr_cmd_args_write)); + if (WARN_ON(retval != 0)) + goto func_exit; + retval = proc_mgr_write(src_args.handle, + src_args.proc_addr, &(src_args.num_bytes), + src_args.buffer); + if (WARN_ON(retval < 0)) + goto func_exit; + retval = copy_to_user((void __user *)(args), + (const void *)&src_args, + sizeof(struct proc_mgr_cmd_args_write)); + WARN_ON(retval < 0); + } + break; + + case CMD_PROCMGR_CONTROL: + { + struct proc_mgr_cmd_args_control src_args; + + /* Copy the full args from user-side. */ + retval = copy_from_user((void *)&src_args, + (const void __user *)(args), + sizeof(struct proc_mgr_cmd_args_control)); + if (WARN_ON(retval != 0)) + goto func_exit; + retval = proc_mgr_control(src_args.handle, + src_args.cmd, src_args.arg); + WARN_ON(retval < 0); + } + break; + + case CMD_PROCMGR_TRANSLATEADDR: + { + struct proc_mgr_cmd_args_translate_addr src_args; + + /* Copy the full args from user-side. */ + retval = copy_from_user((void *)&src_args, + (const void __user *)(args), + sizeof(struct proc_mgr_cmd_args_translate_addr)); + if (WARN_ON(retval != 0)) + goto func_exit; + retval = proc_mgr_translate_addr(src_args.handle, + &(src_args.dst_addr), src_args.dst_addr_type, + src_args.src_addr, src_args.src_addr_type); + if (WARN_ON(retval < 0)) + goto func_exit; + retval = copy_to_user((void __user *)(args), + (const void *)&src_args, sizeof + (struct proc_mgr_cmd_args_translate_addr)); + WARN_ON(retval < 0); + } + break; + + case CMD_PROCMGR_REGISTERNOTIFY: + { + struct proc_mgr_cmd_args_register_notify src_args; + + /* Copy the full args from user-side. */ + retval = copy_from_user((void *)&src_args, + (const void __user *)(args), + sizeof(struct proc_mgr_cmd_args_register_notify)); + if (WARN_ON(retval != 0)) + goto func_exit; + retval = proc_mgr_register_notify(src_args.handle, + src_args.callback_fxn, + src_args.args, src_args.state); + WARN_ON(retval < 0); + } + break; + + case CMD_PROCMGR_GETPROCINFO: + { + struct proc_mgr_cmd_args_get_proc_info src_args; + struct proc_mgr_proc_info *proc_info; + + /* Copy the full args from user-side. */ + retval = copy_from_user((void *)&src_args, + (const void __user *)(args), + sizeof(struct proc_mgr_cmd_args_get_proc_info)); + if (WARN_ON(retval != 0)) + goto func_exit; + + proc_info = kzalloc(sizeof(struct proc_mgr_proc_info), + GFP_KERNEL); + retval = proc_mgr_get_proc_info + (src_args.handle, proc_info); + if (WARN_ON(retval < 0)) { + kfree(proc_info); + goto func_exit; + } + retval = copy_to_user((void __user *)(src_args.proc_info), + (const void *) proc_info, + sizeof(struct proc_mgr_proc_info)); + WARN_ON(retval < 0); + kfree(proc_info); + } + break; + + case CMD_PROCMGR_GETVIRTTOPHYS: + { + struct proc_mgr_cmd_args_get_virt_to_phys src_args; + + retval = copy_from_user((void *)&src_args, + (const void __user *)(args), + sizeof(struct proc_mgr_cmd_args_get_virt_to_phys)); + retval = proc_mgr_virt_to_phys(src_args.handle, + src_args.da, (src_args.mem_entries), + src_args.num_of_entries); + if (WARN_ON(retval < 0)) + goto func_exit; + retval = copy_to_user((void __user *)(args), + (const void *)&src_args, + sizeof(struct proc_mgr_cmd_args_get_virt_to_phys)); + WARN_ON(retval < 0); + } + break; + + /* + * This is added to provide the information whether to enable + * lock all entries in TLB or not. ES1.0 requires all the entries + * to be locked, so the loader in userspace makes the decision on + * how the entries should be programmed based on ES revision. This + * case is meant for temporary purpose and can be removed once ES1.0 + * boards are phased out + */ + case CMD_PROCMGR_GETBOARDREV: + { + int rev; + struct proc_mgr_cmd_args_cpurev src_args; + retval = copy_from_user((void *)&src_args, + (const void __user *)(args), + sizeof(struct proc_mgr_cmd_args_cpurev)); + if (WARN_ON(retval < 0)) + goto func_exit; + + rev = GET_OMAP_REVISION(); + *(src_args.cpu_rev) = rev; + retval = copy_to_user((void __user *)(args), + (const void *)&src_args, + sizeof(struct proc_mgr_cmd_args_cpurev)); + if (WARN_ON(retval < 0)) + goto func_exit; + } + break; + default: + pr_err("PROC_MGR_DRV: WRONG IOCTL !!!!\n"); + BUG_ON(1); + break; + } +func_exit: + /* Set the retval and copy the common args to user-side. */ + command_args.api_status = retval; + retval = copy_to_user((void __user *)cmd_args, + (const void *)&command_args, sizeof(struct proc_mgr_cmd_args)); + + WARN_ON(retval < 0); + return retval; +} + + +/* + Driver function to map memory regions to user space. + */ +static int proc_mgr_drv_mmap(struct file *filp, struct vm_area_struct *vma) +{ + vma->vm_page_prot = pgprot_dmacoherent(vma->vm_page_prot); + vma->vm_flags |= VM_RESERVED; + + if (remap_pfn_range(vma, + vma->vm_start, + vma->vm_pgoff, + vma->vm_end - vma->vm_start, + vma->vm_page_prot)) { + return -EAGAIN; + } + return 0; +} + +static int __devinit proc_mgr_probe(struct platform_device *pdev) +{ + dev_t dev = 0 ; + int retval = -ENOMEM; + + /* Display the version info and created date/time */ + dev_dbg(&omap_proc_dev->dev, "Entering %s function\n\n", __func__); + + if (driver_major) { + dev = MKDEV(driver_major, driver_minor); + retval = register_chrdev_region(dev, 1, driver_name); + } else { + retval = alloc_chrdev_region(&dev, driver_minor, 1, + driver_name); + driver_major = MAJOR(dev); + } + + procmgr_device = kmalloc(sizeof(struct procmgr_dev), GFP_KERNEL); + if (!procmgr_device) { + retval = -ENOMEM; + unregister_chrdev_region(dev, 1); + goto exit; + } + memset(procmgr_device, 0, sizeof(struct procmgr_dev)); + cdev_init(&procmgr_device->cdev, &procmgr_fops); + procmgr_device->cdev.owner = THIS_MODULE; + procmgr_device->cdev.ops = &procmgr_fops; + + retval = cdev_add(&procmgr_device->cdev, dev, 1); + + if (retval) { + pr_err("Failed to add the syslink procmgr device\n"); + goto exit; + } + + /* udev support */ + proc_mgr_class = class_create(THIS_MODULE, "syslink-procmgr"); + + if (IS_ERR(proc_mgr_class)) { + pr_err("Error creating bridge class\n"); + goto exit; + } + device_create(proc_mgr_class, NULL, MKDEV(driver_major, driver_minor), + NULL, PROCMGR_NAME); + +exit: + dev_dbg(&omap_proc_dev->dev, "Leaving %s function\n\n", __func__); + return retval; +} + + +static int __devexit proc_mgr_remove(struct platform_device *pdev) +{ + dev_t devno = 0; + + dev_dbg(&omap_proc_dev->dev, "Entering %s function\n", __func__); + devno = MKDEV(driver_major, driver_minor); + if (procmgr_device) { + cdev_del(&procmgr_device->cdev); + kfree(procmgr_device); + } + unregister_chrdev_region(devno, 1); + if (proc_mgr_class) { + /* remove the device from sysfs */ + device_destroy(proc_mgr_class, MKDEV(driver_major, + driver_minor)); + class_destroy(proc_mgr_class); + } + dev_dbg(&omap_proc_dev->dev, "Entering %s function\n", __func__); + return 0; +} + +/* +* Module initialization function for Linux driver. + */ +static int __init proc_mgr_drv_initialize_module(void) +{ + int retval = -ENOMEM; + + procmgr_pdev = platform_device_alloc(PROCMGR_NAME, -1); + if (!procmgr_pdev) { + pr_err("%s:device allocation failed\n", __func__); + return -ENOMEM; + } + retval = platform_device_add(procmgr_pdev); + if (retval) + goto err_out; + + /*Saving the context for future use*/ + omap_proc_dev = procmgr_pdev; + + retval = platform_driver_register(&procmgr_driver); + if (!retval) + return retval; +err_out: + platform_device_put(procmgr_pdev); + return retval; +} + +/* +* driver function to finalize the driver module. + */ +static void __exit proc_mgr_drv_finalize_module(void) +{ + + dev_dbg(&omap_proc_dev->dev, "Entering %s function\n", __func__); + platform_device_unregister(procmgr_pdev); + platform_driver_unregister(&procmgr_driver); + dev_dbg(&omap_proc_dev->dev, "Leaving %s function\n", __func__); +} + +/* +* brief Macro calls that indicate initialization and finalization functions + * to the kernel. + */ +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Mugdha Kamoolkar"); +module_init(proc_mgr_drv_initialize_module); +module_exit(proc_mgr_drv_finalize_module); |