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/***********************license start***************
* Copyright (c) 2003-2008 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.
*
* 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.
*
*
* For any questions regarding licensing please contact marketing@caviumnetworks.com
*
***********************license end**************************************/
/**
* @file
*
* Support library for the hardware DFA engine.
*
* <hr>$Revision: 41586 $<hr>
*/
#include "executive-config.h"
#ifdef CVMX_ENABLE_DFA_FUNCTIONS
#include "cvmx-config.h"
#include "cvmx.h"
#include "cvmx-fau.h"
#include "cvmx-dfa.h"
/**
* Initialize the DFA hardware before use
*/
int cvmx_dfa_initialize(void)
{
cvmx_dfa_difctl_t control;
void *initial_base_address;
cvmx_dfa_state_t initial_state;
if (!octeon_has_feature(OCTEON_FEATURE_DFA))
{
cvmx_dprintf("ERROR: attempting to initialize DFA when no DFA hardware present\n.");
return -1;
}
control.u64 = 0;
control.s.dwbcnt = CVMX_FPA_DFA_POOL_SIZE / 128;
control.s.pool = CVMX_FPA_DFA_POOL;
control.s.size = (CVMX_FPA_DFA_POOL_SIZE - 8) / sizeof(cvmx_dfa_command_t);
CVMX_SYNCWS;
cvmx_write_csr(CVMX_DFA_DIFCTL, control.u64);
initial_base_address = cvmx_fpa_alloc(CVMX_FPA_DFA_POOL);
initial_state.u64 = 0;
initial_state.s.base_address_div16 = (CAST64(initial_base_address))/16;
cvmx_fau_atomic_write64(CVMX_FAU_DFA_STATE, initial_state.u64);
CVMX_SYNCWS;
cvmx_write_csr(CVMX_DFA_DIFRDPTR, cvmx_ptr_to_phys(initial_base_address));
return 0;
}
/**
* Shutdown and cleanup resources used by the DFA
*/
void cvmx_dfa_shutdown(void)
{
void *final_base_address;
cvmx_dfa_state_t final_state;
CVMX_SYNCWS;
final_state.u64 = cvmx_fau_fetch_and_add64(CVMX_FAU_DFA_STATE, 0);
// make sure the carry is clear
final_base_address = CASTPTR(void, (final_state.s2.base_address_div32 * 32ull));
if (final_base_address)
{
cvmx_fpa_free(final_base_address, CVMX_FPA_DFA_POOL, 0);
}
CVMX_SYNCWS;
final_state.u64 = 0;
cvmx_fau_atomic_write64(CVMX_FAU_DFA_STATE, final_state.u64);
}
#endif
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