cvmx-raid.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 * Interface to RAID block. This is not available on all chips. 48210284Sjmallett * 49210284Sjmallett * <hr>$Revision: 41586 $<hr> 50210284Sjmallett */ 51210284Sjmallett#include "executive-config.h" 52210284Sjmallett#include "cvmx-config.h" 53210284Sjmallett#include "cvmx.h" 54210284Sjmallett#include "cvmx-cmd-queue.h" 55210284Sjmallett#include "cvmx-raid.h" 56210284Sjmallett 57210284Sjmallett#ifdef CVMX_ENABLE_PKO_FUNCTIONS 58210284Sjmallett 59210284Sjmallett/** 60210284Sjmallett * Initialize the RAID block 61210284Sjmallett * 62210284Sjmallett * @param polynomial Coefficients for the RAID polynomial 63210284Sjmallett * 64210284Sjmallett * @return Zero on success, negative on failure 65210284Sjmallett */ 66210284Sjmallettint cvmx_raid_initialize(cvmx_rad_reg_polynomial_t polynomial) 67210284Sjmallett{ 68210284Sjmallett cvmx_cmd_queue_result_t result; 69210284Sjmallett cvmx_rad_reg_cmd_buf_t rad_reg_cmd_buf; 70210284Sjmallett 71210284Sjmallett cvmx_write_csr(CVMX_RAD_REG_POLYNOMIAL, polynomial.u64); 72210284Sjmallett 73210284Sjmallett result = cvmx_cmd_queue_initialize(CVMX_CMD_QUEUE_RAID, 0, 74210284Sjmallett CVMX_FPA_OUTPUT_BUFFER_POOL, 75210284Sjmallett CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE); 76210284Sjmallett if (result != CVMX_CMD_QUEUE_SUCCESS) 77210284Sjmallett return -1; 78210284Sjmallett 79210284Sjmallett rad_reg_cmd_buf.u64 = 0; 80210284Sjmallett rad_reg_cmd_buf.s.dwb = CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE/128; 81210284Sjmallett rad_reg_cmd_buf.s.pool = CVMX_FPA_OUTPUT_BUFFER_POOL; 82210284Sjmallett rad_reg_cmd_buf.s.size = CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE/8; 83210284Sjmallett rad_reg_cmd_buf.s.ptr = cvmx_ptr_to_phys(cvmx_cmd_queue_buffer(CVMX_CMD_QUEUE_RAID))>>7; 84210284Sjmallett cvmx_write_csr(CVMX_RAD_REG_CMD_BUF, rad_reg_cmd_buf.u64); 85210284Sjmallett return 0; 86210284Sjmallett} 87210284Sjmallett 88210284Sjmallett 89210284Sjmallett/** 90210284Sjmallett * Shutdown the RAID block. RAID must be idle when 91210284Sjmallett * this function is called. 92210284Sjmallett * 93210284Sjmallett * @return Zero on success, negative on failure 94210284Sjmallett */ 95210284Sjmallettint cvmx_raid_shutdown(void) 96210284Sjmallett{ 97210284Sjmallett cvmx_rad_reg_ctl_t rad_reg_ctl; 98210284Sjmallett 99210284Sjmallett if (cvmx_cmd_queue_length(CVMX_CMD_QUEUE_RAID)) 100210284Sjmallett { 101210284Sjmallett cvmx_dprintf("ERROR: cvmx_raid_shutdown: RAID not idle.\n"); 102210284Sjmallett return -1; 103210284Sjmallett } 104210284Sjmallett 105210284Sjmallett rad_reg_ctl.u64 = cvmx_read_csr(CVMX_RAD_REG_CTL); 106210284Sjmallett rad_reg_ctl.s.reset = 1; 107210284Sjmallett cvmx_write_csr(CVMX_RAD_REG_CTL, rad_reg_ctl.u64); 108210284Sjmallett cvmx_wait(100); 109210284Sjmallett 110210284Sjmallett cvmx_cmd_queue_shutdown(CVMX_CMD_QUEUE_RAID); 111210284Sjmallett cvmx_write_csr(CVMX_RAD_REG_CMD_BUF, 0); 112210284Sjmallett return 0; 113210284Sjmallett} 114210284Sjmallett 115210284Sjmallett 116210284Sjmallett/** 117210284Sjmallett * Submit a command to the RAID block 118210284Sjmallett * 119210284Sjmallett * @param num_words Number of command words to submit 120210284Sjmallett * @param words Command words 121210284Sjmallett * 122210284Sjmallett * @return Zero on success, negative on failure 123210284Sjmallett */ 124210284Sjmallettint cvmx_raid_submit(int num_words, cvmx_raid_word_t words[]) 125210284Sjmallett{ 126210284Sjmallett cvmx_cmd_queue_result_t result = cvmx_cmd_queue_write(CVMX_CMD_QUEUE_RAID, 1, num_words, (uint64_t *)words); 127210284Sjmallett if (result == CVMX_CMD_QUEUE_SUCCESS) 128210284Sjmallett cvmx_write_csr(CVMX_ADDR_DID(CVMX_FULL_DID(14, 0)), num_words); 129210284Sjmallett return result; 130210284Sjmallett} 131210284Sjmallett 132210284Sjmallett#endif 133