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/***********************license start***************
* Copyright (c) 2003-2010 Cavium Networks (support@cavium.com). All rights
* reserved.
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of Cavium Networks nor the names of
* its contributors may be used to endorse or promote products
* derived from this software without specific prior written
* permission.
* This Software, including technical data, may be subject to U.S. export control
* laws, including the U.S. Export Administration Act and its associated
* regulations, and may be subject to export or import regulations in other
* countries.
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
* AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS OR
* WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
* THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR
* DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
* SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
* MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
* VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
* CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR
* PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
***********************license end**************************************/
/**
* @file
*
* Small helper utilities.
*
* <hr>$Revision: 49448 $<hr>
*/
#ifndef __CVMX_HELPER_UTIL_H__
#define __CVMX_HELPER_UTIL_H__
#ifdef CVMX_ENABLE_HELPER_FUNCTIONS
/**
* Convert a interface mode into a human readable string
*
* @param mode Mode to convert
*
* @return String
*/
extern const char *cvmx_helper_interface_mode_to_string(cvmx_helper_interface_mode_t mode);
/**
* Debug routine to dump the packet structure to the console
*
* @param work Work queue entry containing the packet to dump
* @return
*/
extern int cvmx_helper_dump_packet(cvmx_wqe_t *work);
/**
* Setup Random Early Drop on a specific input queue
*
* @param queue Input queue to setup RED on (0-7)
* @param pass_thresh
* Packets will begin slowly dropping when there are less than
* this many packet buffers free in FPA 0.
* @param drop_thresh
* All incomming packets will be dropped when there are less
* than this many free packet buffers in FPA 0.
* @return Zero on success. Negative on failure
*/
extern int cvmx_helper_setup_red_queue(int queue, int pass_thresh, int drop_thresh);
/**
* Setup Random Early Drop to automatically begin dropping packets.
*
* @param pass_thresh
* Packets will begin slowly dropping when there are less than
* this many packet buffers free in FPA 0.
* @param drop_thresh
* All incomming packets will be dropped when there are less
* than this many free packet buffers in FPA 0.
* @return Zero on success. Negative on failure
*/
extern int cvmx_helper_setup_red(int pass_thresh, int drop_thresh);
/**
* Get the version of the CVMX libraries.
*
* @return Version string. Note this buffer is allocated statically
* and will be shared by all callers.
*/
extern const char *cvmx_helper_get_version(void);
/**
* @INTERNAL
* Setup the common GMX settings that determine the number of
* ports. These setting apply to almost all configurations of all
* chips.
*
* @param interface Interface to configure
* @param num_ports Number of ports on the interface
*
* @return Zero on success, negative on failure
*/
extern int __cvmx_helper_setup_gmx(int interface, int num_ports);
/**
* Returns the IPD/PKO port number for a port on the given
* interface.
*
* @param interface Interface to use
* @param port Port on the interface
*
* @return IPD/PKO port number
*/
extern int cvmx_helper_get_ipd_port(int interface, int port);
/**
* Returns the IPD/PKO port number for the first port on the given
* interface.
*
* @param interface Interface to use
*
* @return IPD/PKO port number
*/
static inline int cvmx_helper_get_first_ipd_port(int interface)
{
return (cvmx_helper_get_ipd_port (interface, 0));
}
/**
* Returns the IPD/PKO port number for the last port on the given
* interface.
*
* @param interface Interface to use
*
* @return IPD/PKO port number
*/
static inline int cvmx_helper_get_last_ipd_port (int interface)
{
return (cvmx_helper_get_first_ipd_port (interface) +
cvmx_helper_ports_on_interface (interface) - 1);
}
/**
* Free the packet buffers contained in a work queue entry.
* The work queue entry is not freed.
*
* @param work Work queue entry with packet to free
*/
static inline void cvmx_helper_free_packet_data(cvmx_wqe_t *work)
{
uint64_t number_buffers;
cvmx_buf_ptr_t buffer_ptr;
cvmx_buf_ptr_t next_buffer_ptr;
uint64_t start_of_buffer;
number_buffers = work->word2.s.bufs;
if (number_buffers == 0)
return;
buffer_ptr = work->packet_ptr;
/* Since the number of buffers is not zero, we know this is not a dynamic
short packet. We need to check if it is a packet received with
IPD_CTL_STATUS[NO_WPTR]. If this is true, we need to free all buffers
except for the first one. The caller doesn't expect their WQE pointer
to be freed */
start_of_buffer = ((buffer_ptr.s.addr >> 7) - buffer_ptr.s.back) << 7;
if (cvmx_ptr_to_phys(work) == start_of_buffer)
{
next_buffer_ptr = *(cvmx_buf_ptr_t*)cvmx_phys_to_ptr(buffer_ptr.s.addr - 8);
buffer_ptr = next_buffer_ptr;
number_buffers--;
}
while (number_buffers--)
{
/* Remember the back pointer is in cache lines, not 64bit words */
start_of_buffer = ((buffer_ptr.s.addr >> 7) - buffer_ptr.s.back) << 7;
/* Read pointer to next buffer before we free the current buffer. */
next_buffer_ptr = *(cvmx_buf_ptr_t*)cvmx_phys_to_ptr(buffer_ptr.s.addr - 8);
cvmx_fpa_free(cvmx_phys_to_ptr(start_of_buffer), buffer_ptr.s.pool, 0);
buffer_ptr = next_buffer_ptr;
}
}
#endif /* CVMX_ENABLE_HELPER_FUNCTIONS */
/**
* Returns the interface number for an IPD/PKO port number.
*
* @param ipd_port IPD/PKO port number
*
* @return Interface number
*/
extern int cvmx_helper_get_interface_num(int ipd_port);
/**
* Returns the interface index number for an IPD/PKO port
* number.
*
* @param ipd_port IPD/PKO port number
*
* @return Interface index number
*/
extern int cvmx_helper_get_interface_index_num(int ipd_port);
#endif /* __CVMX_HELPER_H__ */
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