1210284Sjmallett/***********************license start*************** 2232812Sjmallett * Copyright (c) 2003-2010 Cavium Inc. (support@cavium.com). All rights 3215990Sjmallett * reserved. 4210284Sjmallett * 5210284Sjmallett * 6215990Sjmallett * Redistribution and use in source and binary forms, with or without 7215990Sjmallett * modification, are permitted provided that the following conditions are 8215990Sjmallett * met: 9210284Sjmallett * 10215990Sjmallett * * Redistributions of source code must retain the above copyright 11215990Sjmallett * notice, this list of conditions and the following disclaimer. 12210284Sjmallett * 13215990Sjmallett * * Redistributions in binary form must reproduce the above 14215990Sjmallett * copyright notice, this list of conditions and the following 15215990Sjmallett * disclaimer in the documentation and/or other materials provided 16215990Sjmallett * with the distribution. 17215990Sjmallett 18232812Sjmallett * * Neither the name of Cavium Inc. nor the names of 19215990Sjmallett * its contributors may be used to endorse or promote products 20215990Sjmallett * derived from this software without specific prior written 21215990Sjmallett * permission. 22215990Sjmallett 23215990Sjmallett * This Software, including technical data, may be subject to U.S. export control 24215990Sjmallett * laws, including the U.S. Export Administration Act and its associated 25215990Sjmallett * regulations, and may be subject to export or import regulations in other 26215990Sjmallett * countries. 27215990Sjmallett 28215990Sjmallett * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS" 29232812Sjmallett * AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS OR 30215990Sjmallett * WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO 31215990Sjmallett * THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR 32215990Sjmallett * DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM 33215990Sjmallett * SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE, 34215990Sjmallett * MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF 35215990Sjmallett * VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR 36215990Sjmallett * CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR 37215990Sjmallett * PERFORMANCE OF THE SOFTWARE LIES WITH YOU. 38210284Sjmallett ***********************license end**************************************/ 39210284Sjmallett 40210284Sjmallett 41210284Sjmallett 42210284Sjmallett 43210284Sjmallett 44210284Sjmallett 45215990Sjmallett 46210284Sjmallett/** 47210284Sjmallett * @file 48210284Sjmallett * 49215990Sjmallett * Support library for the CN31XX, CN38XX, and CN58XX hardware DFA engine. 50210284Sjmallett * 51232812Sjmallett * <hr>$Revision: 70030 $<hr> 52210284Sjmallett */ 53210284Sjmallett#include "executive-config.h" 54210284Sjmallett#ifdef CVMX_ENABLE_DFA_FUNCTIONS 55210284Sjmallett 56210284Sjmallett#include "cvmx-config.h" 57210284Sjmallett#include "cvmx.h" 58210284Sjmallett#include "cvmx-fau.h" 59210284Sjmallett#include "cvmx-dfa.h" 60210284Sjmallett 61210284Sjmallett 62210284Sjmallett 63210284Sjmallett/** 64210284Sjmallett * Initialize the DFA hardware before use 65210284Sjmallett */ 66210284Sjmallettint cvmx_dfa_initialize(void) 67210284Sjmallett{ 68210284Sjmallett cvmx_dfa_difctl_t control; 69210284Sjmallett void *initial_base_address; 70210284Sjmallett cvmx_dfa_state_t initial_state; 71210284Sjmallett if (!octeon_has_feature(OCTEON_FEATURE_DFA)) 72210284Sjmallett { 73210284Sjmallett cvmx_dprintf("ERROR: attempting to initialize DFA when no DFA hardware present\n."); 74210284Sjmallett return -1; 75210284Sjmallett } 76210284Sjmallett 77210284Sjmallett control.u64 = 0; 78210284Sjmallett control.s.dwbcnt = CVMX_FPA_DFA_POOL_SIZE / 128; 79210284Sjmallett control.s.pool = CVMX_FPA_DFA_POOL; 80210284Sjmallett control.s.size = (CVMX_FPA_DFA_POOL_SIZE - 8) / sizeof(cvmx_dfa_command_t); 81210284Sjmallett CVMX_SYNCWS; 82210284Sjmallett cvmx_write_csr(CVMX_DFA_DIFCTL, control.u64); 83210284Sjmallett 84210284Sjmallett initial_base_address = cvmx_fpa_alloc(CVMX_FPA_DFA_POOL); 85210284Sjmallett 86210284Sjmallett initial_state.u64 = 0; 87210284Sjmallett initial_state.s.base_address_div16 = (CAST64(initial_base_address))/16; 88210284Sjmallett cvmx_fau_atomic_write64(CVMX_FAU_DFA_STATE, initial_state.u64); 89210284Sjmallett 90210284Sjmallett CVMX_SYNCWS; 91210284Sjmallett cvmx_write_csr(CVMX_DFA_DIFRDPTR, cvmx_ptr_to_phys(initial_base_address)); 92210284Sjmallett 93210284Sjmallett return 0; 94210284Sjmallett} 95210284Sjmallett 96210284Sjmallett 97210284Sjmallett/** 98210284Sjmallett * Shutdown and cleanup resources used by the DFA 99210284Sjmallett */ 100210284Sjmallettvoid cvmx_dfa_shutdown(void) 101210284Sjmallett{ 102210284Sjmallett void *final_base_address; 103210284Sjmallett cvmx_dfa_state_t final_state; 104210284Sjmallett 105210284Sjmallett CVMX_SYNCWS; 106210284Sjmallett 107210284Sjmallett final_state.u64 = cvmx_fau_fetch_and_add64(CVMX_FAU_DFA_STATE, 0); 108210284Sjmallett 109210284Sjmallett // make sure the carry is clear 110210284Sjmallett final_base_address = CASTPTR(void, (final_state.s2.base_address_div32 * 32ull)); 111210284Sjmallett 112210284Sjmallett if (final_base_address) 113210284Sjmallett { 114210284Sjmallett cvmx_fpa_free(final_base_address, CVMX_FPA_DFA_POOL, 0); 115210284Sjmallett } 116210284Sjmallett 117210284Sjmallett CVMX_SYNCWS; 118210284Sjmallett final_state.u64 = 0; 119210284Sjmallett cvmx_fau_atomic_write64(CVMX_FAU_DFA_STATE, final_state.u64); 120210284Sjmallett} 121210284Sjmallett 122210284Sjmallett#endif 123