cvmx-raid.c revision 215990
1210284Sjmallett/***********************license start*************** 2215990Sjmallett * Copyright (c) 2003-2010 Cavium Networks (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 18215990Sjmallett * * Neither the name of Cavium Networks 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" 29215990Sjmallett * AND WITH ALL FAULTS AND CAVIUM NETWORKS 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 * 49210284Sjmallett * Interface to RAID block. This is not available on all chips. 50210284Sjmallett * 51215990Sjmallett * <hr>$Revision: 49448 $<hr> 52210284Sjmallett */ 53210284Sjmallett#include "executive-config.h" 54210284Sjmallett#include "cvmx-config.h" 55210284Sjmallett#include "cvmx.h" 56210284Sjmallett#include "cvmx-cmd-queue.h" 57210284Sjmallett#include "cvmx-raid.h" 58210284Sjmallett 59210284Sjmallett#ifdef CVMX_ENABLE_PKO_FUNCTIONS 60210284Sjmallett 61210284Sjmallett/** 62210284Sjmallett * Initialize the RAID block 63210284Sjmallett * 64210284Sjmallett * @param polynomial Coefficients for the RAID polynomial 65210284Sjmallett * 66210284Sjmallett * @return Zero on success, negative on failure 67210284Sjmallett */ 68210284Sjmallettint cvmx_raid_initialize(cvmx_rad_reg_polynomial_t polynomial) 69210284Sjmallett{ 70210284Sjmallett cvmx_cmd_queue_result_t result; 71210284Sjmallett cvmx_rad_reg_cmd_buf_t rad_reg_cmd_buf; 72210284Sjmallett 73210284Sjmallett cvmx_write_csr(CVMX_RAD_REG_POLYNOMIAL, polynomial.u64); 74210284Sjmallett 75210284Sjmallett result = cvmx_cmd_queue_initialize(CVMX_CMD_QUEUE_RAID, 0, 76210284Sjmallett CVMX_FPA_OUTPUT_BUFFER_POOL, 77210284Sjmallett CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE); 78210284Sjmallett if (result != CVMX_CMD_QUEUE_SUCCESS) 79210284Sjmallett return -1; 80210284Sjmallett 81210284Sjmallett rad_reg_cmd_buf.u64 = 0; 82210284Sjmallett rad_reg_cmd_buf.s.dwb = CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE/128; 83210284Sjmallett rad_reg_cmd_buf.s.pool = CVMX_FPA_OUTPUT_BUFFER_POOL; 84210284Sjmallett rad_reg_cmd_buf.s.size = CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE/8; 85210284Sjmallett rad_reg_cmd_buf.s.ptr = cvmx_ptr_to_phys(cvmx_cmd_queue_buffer(CVMX_CMD_QUEUE_RAID))>>7; 86210284Sjmallett cvmx_write_csr(CVMX_RAD_REG_CMD_BUF, rad_reg_cmd_buf.u64); 87210284Sjmallett return 0; 88210284Sjmallett} 89210284Sjmallett 90210284Sjmallett 91210284Sjmallett/** 92210284Sjmallett * Shutdown the RAID block. RAID must be idle when 93210284Sjmallett * this function is called. 94210284Sjmallett * 95210284Sjmallett * @return Zero on success, negative on failure 96210284Sjmallett */ 97210284Sjmallettint cvmx_raid_shutdown(void) 98210284Sjmallett{ 99210284Sjmallett cvmx_rad_reg_ctl_t rad_reg_ctl; 100210284Sjmallett 101210284Sjmallett if (cvmx_cmd_queue_length(CVMX_CMD_QUEUE_RAID)) 102210284Sjmallett { 103210284Sjmallett cvmx_dprintf("ERROR: cvmx_raid_shutdown: RAID not idle.\n"); 104210284Sjmallett return -1; 105210284Sjmallett } 106210284Sjmallett 107210284Sjmallett rad_reg_ctl.u64 = cvmx_read_csr(CVMX_RAD_REG_CTL); 108210284Sjmallett rad_reg_ctl.s.reset = 1; 109210284Sjmallett cvmx_write_csr(CVMX_RAD_REG_CTL, rad_reg_ctl.u64); 110210284Sjmallett cvmx_wait(100); 111210284Sjmallett 112210284Sjmallett cvmx_cmd_queue_shutdown(CVMX_CMD_QUEUE_RAID); 113210284Sjmallett cvmx_write_csr(CVMX_RAD_REG_CMD_BUF, 0); 114210284Sjmallett return 0; 115210284Sjmallett} 116210284Sjmallett 117210284Sjmallett 118210284Sjmallett/** 119210284Sjmallett * Submit a command to the RAID block 120210284Sjmallett * 121210284Sjmallett * @param num_words Number of command words to submit 122210284Sjmallett * @param words Command words 123210284Sjmallett * 124210284Sjmallett * @return Zero on success, negative on failure 125210284Sjmallett */ 126210284Sjmallettint cvmx_raid_submit(int num_words, cvmx_raid_word_t words[]) 127210284Sjmallett{ 128210284Sjmallett cvmx_cmd_queue_result_t result = cvmx_cmd_queue_write(CVMX_CMD_QUEUE_RAID, 1, num_words, (uint64_t *)words); 129210284Sjmallett if (result == CVMX_CMD_QUEUE_SUCCESS) 130210284Sjmallett cvmx_write_csr(CVMX_ADDR_DID(CVMX_FULL_DID(14, 0)), num_words); 131210284Sjmallett return result; 132210284Sjmallett} 133210284Sjmallett 134210284Sjmallett#endif 135