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********************************************************************************
* mv_cph_dev.c
*
* DESCRIPTION: Marvell CPH(CPH Packet Handler) char device definition
*
* DEPENDENCIES:
*               None
*
* CREATED BY:   VictorGu
*
* DATE CREATED: 22Jan2013
*
* FILE REVISION NUMBER:
*               Revision: 1.0
*
*
*******************************************************************************/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/delay.h>
#include <linux/wait.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/poll.h>
#include <linux/clk.h>
#include <linux/fs.h>
#include <linux/vmalloc.h>
#include <linux/cdev.h>
#include <linux/device.h>
#include <linux/miscdevice.h>

#include "mv_cph_header.h"


/* Used to prevent multiple access to device */
static int               g_cph_device_open = 0;
static struct miscdevice g_cph_misc_dev;

/******************************************************************************
* cph_dev_open()
* _____________________________________________________________________________
*
* DESCRIPTION: The function executes device open actions
*
* INPUTS:
*       inode - Device inode pointer.
*       file  - File handler.
*
* OUTPUTS:
*       None.
*
* RETURNS:
*       On success, the function returns MV_OK. 
*       On error returns error code accordingly.
*******************************************************************************/
static INT32 cph_dev_open(struct inode *inode, struct file *file)
{
    MV_CPH_PRINT(CPH_DEBUG_LEVEL, "Enter\n");

#if 0
    if (g_cph_device_open > 0)
        return -EBUSY;
#endif

    g_cph_device_open++;

    return MV_OK;
}

/******************************************************************************
* cph_dev_release()
* _____________________________________________________________________________
*
* DESCRIPTION: The function executes device release actions
*
* INPUTS:
*       inode - Device inode pointer.
*       file  - File handler.
*
* OUTPUTS:
*       None.
*
* RETURNS:
*       On success, the function returns MV_OK. 
*       On error returns error code accordingly.
*******************************************************************************/
static INT32 cph_dev_release(struct inode *inode, struct file *file)
{
    MV_CPH_PRINT(CPH_DEBUG_LEVEL, "Enter\n");

#if 0
    if (cph_device_open > 0)
        cph_device_open--;
#endif
    return MV_OK;
}

/******************************************************************************
* cph_dev_ioctl()
* _____________________________________________________________________________
*
* DESCRIPTION: The function executes ioctl commands
*
* INPUTS:
*       inode - Device inode pointer.
*       file  - File handler.
*       cmd   - Command.
*       arg   - Ponter to arg.
*
* OUTPUTS:
*       None.
*
* RETURNS:
*       On success, the function returns MV_OK. 
*       On error returns error code accordingly.
*******************************************************************************/
static INT32 cph_dev_ioctl(struct inode *inode, struct file *file, UINT32 cmd, ULONG arg)
{
    CPH_IOCTL_APP_RULE_T    cph_app_rule;
    CPH_IOCTL_FLOW_MAP_T    cph_flow_map;
    CPH_IOCTL_DSCP_MAP_T    cph_dscp_map;
    CPH_IOCTL_MISC_T        cph_misc;
    CPH_IOCTL_TCONT_STATE_T cph_tcont;
    INT32                   rc  = -EINVAL;

    MV_CPH_PRINT(CPH_DEBUG_LEVEL, "Enter\n");

    switch (cmd)
    {
        /* CPH application packet handling IOCTL
        -------------------------------------------*/
        case MV_CPH_IOCTL_SET_COMPLEX_PROFILE:        
            if(copy_from_user(&cph_misc, (CPH_IOCTL_MISC_T *)arg, sizeof(CPH_IOCTL_MISC_T)))
            {
                MV_CPH_PRINT(CPH_ERR_LEVEL, "copy_from_user failed\n");
                goto ioctl_err;
            }

            rc = cph_set_complex_profile(cph_misc.profile_id, cph_misc.active_port);
            break;

        case MV_CPH_IOCTL_SET_FEATURE_FLAG:        
            if(copy_from_user(&cph_misc, (CPH_IOCTL_MISC_T *)arg, sizeof(CPH_IOCTL_MISC_T)))
            {
                MV_CPH_PRINT(CPH_ERR_LEVEL, "copy_from_user failed\n");
                goto ioctl_err;
            }

            rc = cph_set_feature_flag(cph_misc.feature_type, cph_misc.feature_flag);
            break;
                
        case MV_CPH_IOCTL_APP_ADD_RULE:        
            if(copy_from_user(&cph_app_rule, (CPH_IOCTL_APP_RULE_T *)arg, sizeof(CPH_IOCTL_APP_RULE_T)))
            {
                MV_CPH_PRINT(CPH_ERR_LEVEL, "copy_from_user failed\n");
                goto ioctl_err;
            }

            rc = cph_add_app_rule(cph_app_rule.parse_bm, &cph_app_rule.parse_key, cph_app_rule.mod_bm, &cph_app_rule.mod_value, 
                                  cph_app_rule.frwd_bm, &cph_app_rule.frwd_value);
            break;

        case MV_CPH_IOCTL_APP_DEL_RULE:        
            if(copy_from_user(&cph_app_rule, (CPH_IOCTL_APP_RULE_T *)arg, sizeof(CPH_IOCTL_APP_RULE_T)))
            {
                MV_CPH_PRINT(CPH_ERR_LEVEL, "copy_from_user failed\n");
                goto ioctl_err;
            }

            rc = cph_del_app_rule(cph_app_rule.parse_bm, &cph_app_rule.parse_key);
            break;

        case MV_CPH_IOCTL_APP_UPDATE_RULE:        
            if(copy_from_user(&cph_app_rule, (CPH_IOCTL_APP_RULE_T *)arg, sizeof(CPH_IOCTL_APP_RULE_T)))
            {
                MV_CPH_PRINT(CPH_ERR_LEVEL, "copy_from_user failed\n");
                goto ioctl_err;
            }

            rc = cph_update_app_rule(cph_app_rule.parse_bm, &cph_app_rule.parse_key, cph_app_rule.mod_bm, &cph_app_rule.mod_value, 
                                     cph_app_rule.frwd_bm, &cph_app_rule.frwd_value);
            break;

        case MV_CPH_IOCTL_APP_GET_RULE:        
            if(copy_from_user(&cph_app_rule, (CPH_IOCTL_APP_RULE_T *)arg, sizeof(CPH_IOCTL_APP_RULE_T)))
            {
                MV_CPH_PRINT(CPH_ERR_LEVEL, "copy_from_user failed\n");
                goto ioctl_err;
            }

            rc = cph_get_app_rule(cph_app_rule.parse_bm, &cph_app_rule.parse_key, &cph_app_rule.mod_bm, &cph_app_rule.mod_value, 
                                  &cph_app_rule.frwd_bm, &cph_app_rule.frwd_value);

            if(rc != MV_OK)
                goto ioctl_err;

            if(copy_to_user((CPH_IOCTL_APP_RULE_T*)arg, &cph_app_rule, sizeof(CPH_IOCTL_APP_RULE_T)))
            {
                MV_CPH_PRINT(CPH_ERR_LEVEL, "copy_to_user failed\n");                
                goto ioctl_err;
            }               
            break;
            
        /* CPH flow mapping IOCTL
        -------------------------------------------*/
        case MV_CPH_IOCTL_FLOW_ADD_RULE:
            if(copy_from_user(&cph_flow_map, (CPH_IOCTL_FLOW_MAP_T *)arg, sizeof(CPH_IOCTL_FLOW_MAP_T)))
            {
                MV_CPH_PRINT(CPH_ERR_LEVEL, "copy_from_user failed\n");
                goto ioctl_err;
            }

            rc = cph_add_flow_rule(&cph_flow_map.flow_map);
            break;

        case MV_CPH_IOCTL_FLOW_DEL_RULE:
            if(copy_from_user(&cph_flow_map, (CPH_IOCTL_FLOW_MAP_T *)arg, sizeof(CPH_IOCTL_FLOW_MAP_T)))
            {
                MV_CPH_PRINT(CPH_ERR_LEVEL, "copy_from_user failed\n");
                goto ioctl_err;
            }

            rc = cph_del_flow_rule(&cph_flow_map.flow_map);
            break;
            
        case MV_CPH_IOCTL_FLOW_GET_RULE:
            if(copy_from_user(&cph_flow_map, (CPH_IOCTL_FLOW_MAP_T *)arg, sizeof(CPH_IOCTL_FLOW_MAP_T)))
            {
                MV_CPH_PRINT(CPH_ERR_LEVEL, "copy_from_user failed\n");
                goto ioctl_err;
            }
        
            rc = cph_get_flow_rule(&cph_flow_map.flow_map);
        
            if(rc != MV_OK)
                goto ioctl_err;
        
            if(copy_to_user((CPH_IOCTL_FLOW_MAP_T*)arg, &cph_flow_map, sizeof(CPH_IOCTL_FLOW_MAP_T)))
            {
                MV_CPH_PRINT(CPH_ERR_LEVEL, "copy_to_user failed\n");
                goto ioctl_err;
            }          
            break;

        case MV_CPH_IOCTL_FLOW_CLEAR_RULE:
            rc = cph_clear_flow_rule();
            break; 

        case MV_CPH_IOCTL_FLOW_CLEAR_RULE_BY_MH:
            if(copy_from_user(&cph_flow_map, (CPH_IOCTL_FLOW_MAP_T *)arg, sizeof(CPH_IOCTL_FLOW_MAP_T)))
            {
                MV_CPH_PRINT(CPH_ERR_LEVEL, "copy_from_user failed\n");
                goto ioctl_err;
            }

            rc = cph_clear_flow_rule_by_mh(cph_flow_map.flow_map.mh);
            break;

        case MV_CPH_IOCTL_FLOW_SET_DSCP_MAP:
            if(copy_from_user(&cph_dscp_map, (CPH_IOCTL_DSCP_MAP_T *)arg, sizeof(CPH_IOCTL_DSCP_MAP_T)))
            {
                MV_CPH_PRINT(CPH_ERR_LEVEL, "copy_from_user failed\n");
                goto ioctl_err;
            }

            rc = cph_set_flow_dscp_map(&cph_dscp_map.dscp_map);
            break;  

        case MV_CPH_IOCTL_FLOW_DEL_DSCP_MAP:
            rc = cph_del_flow_dscp_map();
            break;

        case MV_CPH_IOCTL_SET_TCONT_LLID_STATE:
            if(copy_from_user(&cph_tcont, (UINT32 *)arg, sizeof(CPH_IOCTL_TCONT_STATE_T)))
            {
                MV_CPH_PRINT(CPH_ERR_LEVEL, "copy_from_user failed\n");
                goto ioctl_err;
            }

            rc = cph_set_tcont_state(cph_tcont.tcont, cph_tcont.state);
            break;  
            
        case MV_CPH_IOCTL_SETUP:
            rc = cph_dev_setup();
            break;
            
        default:
          rc = -EINVAL;
    }

ioctl_err:
    return(rc);
}


static const struct file_operations g_cph_dev_fops = 
{
    .open    = cph_dev_open,
    .release = cph_dev_release,
    .ioctl   = cph_dev_ioctl,
};

/******************************************************************************
* cph_dev_setup()
* _____________________________________________________________________________
*
* DESCRIPTION: Setup device
*
* INPUTS:
*       None.
*
* OUTPUTS:
*       None.
*
* RETURNS:
*       On success, the function returns MV_OK. 
*       On error returns error code accordingly.
*******************************************************************************/
INT32 cph_dev_setup(VOID)
{
    MV_STATUS rc  = MV_OK;

    /* Get parameter from XML file */
    rc = cph_db_get_xml_param();
    CHECK_API_RETURN_AND_LOG_ERROR(rc, "fail to call cph_db_get_xml_param");

    return rc;
}

/******************************************************************************
* cph_dev_init()
* _____________________________________________________________________________
*
* DESCRIPTION: Initialize CPH device
*
* INPUTS:
*       None.
*
* OUTPUTS:
*       None.
*
* RETURNS:
*       On success, the function returns MV_OK. 
*       On error returns error code accordingly.
*******************************************************************************/
INT32 cph_dev_init(VOID)
{
    MV_STATUS rc = MV_OK;
    MV_CPH_PRINT(CPH_DEBUG_LEVEL, "Enter\n");

    g_cph_misc_dev.minor = MISC_DYNAMIC_MINOR;
    g_cph_misc_dev.name  = MV_CPH_DEVICE_NAME;
    g_cph_misc_dev.fops  = &g_cph_dev_fops;

    rc = misc_register(&g_cph_misc_dev);
    CHECK_API_RETURN_AND_LOG_ERROR(rc, "fail to call misc_register");

    rc = cph_netdev_init();
    CHECK_API_RETURN_AND_LOG_ERROR(rc, "fail to call cph_netdev_init");

    rc = cph_sysfs_init();
    CHECK_API_RETURN_AND_LOG_ERROR(rc, "fail to call cph_sysfs_init");

    printk(KERN_INFO "CPH: misc device %s registered with minor: %d\n", MV_CPH_DEVICE_NAME, g_cph_misc_dev.minor);
    return rc;
}

/******************************************************************************
* cph_dev_shutdown()
* _____________________________________________________________________________
*
* DESCRIPTION: Shutdown CPH device
*
* INPUTS:
*       None.
*
* OUTPUTS:
*       None.
*
* RETURNS:
*       None.
*******************************************************************************/
VOID cph_dev_shutdown(VOID)
{
    MV_CPH_PRINT(CPH_DEBUG_LEVEL, "Enter\n");

    cph_sysfs_exit();

    misc_deregister(&g_cph_misc_dev);
}