cvmx-dfa.c revision 210284
1210284Sjmallett/***********************license start*************** 2210284Sjmallett * Copyright (c) 2003-2008 Cavium Networks (support@cavium.com). All rights 3210284Sjmallett * reserved. 4210284Sjmallett * 5210284Sjmallett * 6210284Sjmallett * Redistribution and use in source and binary forms, with or without 7210284Sjmallett * modification, are permitted provided that the following conditions are 8210284Sjmallett * met: 9210284Sjmallett * 10210284Sjmallett * * Redistributions of source code must retain the above copyright 11210284Sjmallett * notice, this list of conditions and the following disclaimer. 12210284Sjmallett * 13210284Sjmallett * * Redistributions in binary form must reproduce the above 14210284Sjmallett * copyright notice, this list of conditions and the following 15210284Sjmallett * disclaimer in the documentation and/or other materials provided 16210284Sjmallett * with the distribution. 17210284Sjmallett * 18210284Sjmallett * * Neither the name of Cavium Networks nor the names of 19210284Sjmallett * its contributors may be used to endorse or promote products 20210284Sjmallett * derived from this software without specific prior written 21210284Sjmallett * permission. 22210284Sjmallett * 23210284Sjmallett * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS" 24210284Sjmallett * AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS 25210284Sjmallett * OR WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH 26210284Sjmallett * RESPECT TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY 27210284Sjmallett * REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT 28210284Sjmallett * DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES 29210284Sjmallett * OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR 30210284Sjmallett * PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET 31210284Sjmallett * POSSESSION OR CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT 32210284Sjmallett * OF USE OR PERFORMANCE OF THE SOFTWARE LIES WITH YOU. 33210284Sjmallett * 34210284Sjmallett * 35210284Sjmallett * For any questions regarding licensing please contact marketing@caviumnetworks.com 36210284Sjmallett * 37210284Sjmallett ***********************license end**************************************/ 38210284Sjmallett 39210284Sjmallett 40210284Sjmallett 41210284Sjmallett 42210284Sjmallett 43210284Sjmallett 44210284Sjmallett/** 45210284Sjmallett * @file 46210284Sjmallett * 47210284Sjmallett * Support library for the hardware DFA engine. 48210284Sjmallett * 49210284Sjmallett * <hr>$Revision: 41586 $<hr> 50210284Sjmallett */ 51210284Sjmallett#include "executive-config.h" 52210284Sjmallett#ifdef CVMX_ENABLE_DFA_FUNCTIONS 53210284Sjmallett 54210284Sjmallett#include "cvmx-config.h" 55210284Sjmallett#include "cvmx.h" 56210284Sjmallett#include "cvmx-fau.h" 57210284Sjmallett#include "cvmx-dfa.h" 58210284Sjmallett 59210284Sjmallett 60210284Sjmallett 61210284Sjmallett/** 62210284Sjmallett * Initialize the DFA hardware before use 63210284Sjmallett */ 64210284Sjmallettint cvmx_dfa_initialize(void) 65210284Sjmallett{ 66210284Sjmallett cvmx_dfa_difctl_t control; 67210284Sjmallett void *initial_base_address; 68210284Sjmallett cvmx_dfa_state_t initial_state; 69210284Sjmallett if (!octeon_has_feature(OCTEON_FEATURE_DFA)) 70210284Sjmallett { 71210284Sjmallett cvmx_dprintf("ERROR: attempting to initialize DFA when no DFA hardware present\n."); 72210284Sjmallett return -1; 73210284Sjmallett } 74210284Sjmallett 75210284Sjmallett control.u64 = 0; 76210284Sjmallett control.s.dwbcnt = CVMX_FPA_DFA_POOL_SIZE / 128; 77210284Sjmallett control.s.pool = CVMX_FPA_DFA_POOL; 78210284Sjmallett control.s.size = (CVMX_FPA_DFA_POOL_SIZE - 8) / sizeof(cvmx_dfa_command_t); 79210284Sjmallett CVMX_SYNCWS; 80210284Sjmallett cvmx_write_csr(CVMX_DFA_DIFCTL, control.u64); 81210284Sjmallett 82210284Sjmallett initial_base_address = cvmx_fpa_alloc(CVMX_FPA_DFA_POOL); 83210284Sjmallett 84210284Sjmallett initial_state.u64 = 0; 85210284Sjmallett initial_state.s.base_address_div16 = (CAST64(initial_base_address))/16; 86210284Sjmallett cvmx_fau_atomic_write64(CVMX_FAU_DFA_STATE, initial_state.u64); 87210284Sjmallett 88210284Sjmallett CVMX_SYNCWS; 89210284Sjmallett cvmx_write_csr(CVMX_DFA_DIFRDPTR, cvmx_ptr_to_phys(initial_base_address)); 90210284Sjmallett 91210284Sjmallett return 0; 92210284Sjmallett} 93210284Sjmallett 94210284Sjmallett 95210284Sjmallett/** 96210284Sjmallett * Shutdown and cleanup resources used by the DFA 97210284Sjmallett */ 98210284Sjmallettvoid cvmx_dfa_shutdown(void) 99210284Sjmallett{ 100210284Sjmallett void *final_base_address; 101210284Sjmallett cvmx_dfa_state_t final_state; 102210284Sjmallett 103210284Sjmallett CVMX_SYNCWS; 104210284Sjmallett 105210284Sjmallett final_state.u64 = cvmx_fau_fetch_and_add64(CVMX_FAU_DFA_STATE, 0); 106210284Sjmallett 107210284Sjmallett // make sure the carry is clear 108210284Sjmallett final_base_address = CASTPTR(void, (final_state.s2.base_address_div32 * 32ull)); 109210284Sjmallett 110210284Sjmallett if (final_base_address) 111210284Sjmallett { 112210284Sjmallett cvmx_fpa_free(final_base_address, CVMX_FPA_DFA_POOL, 0); 113210284Sjmallett } 114210284Sjmallett 115210284Sjmallett CVMX_SYNCWS; 116210284Sjmallett final_state.u64 = 0; 117210284Sjmallett cvmx_fau_atomic_write64(CVMX_FAU_DFA_STATE, final_state.u64); 118210284Sjmallett} 119210284Sjmallett 120210284Sjmallett#endif 121