cvmx-raid.c revision 232812
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 * 49210284Sjmallett * Interface to RAID block. This is not available on all chips. 50210284Sjmallett * 51232812Sjmallett * <hr>$Revision: 70030 $<hr> 52210284Sjmallett */ 53232812Sjmallett#ifdef CVMX_BUILD_FOR_LINUX_KERNEL 54232812Sjmallett#include <linux/module.h> 55232812Sjmallett#include <asm/octeon/cvmx.h> 56232812Sjmallett#include <asm/octeon/cvmx-config.h> 57232812Sjmallett#include <asm/octeon/cvmx-cmd-queue.h> 58232812Sjmallett#include <asm/octeon/cvmx-raid.h> 59232812Sjmallett#else 60210284Sjmallett#include "executive-config.h" 61210284Sjmallett#include "cvmx-config.h" 62210284Sjmallett#include "cvmx.h" 63210284Sjmallett#include "cvmx-cmd-queue.h" 64210284Sjmallett#include "cvmx-raid.h" 65232812Sjmallett#endif 66210284Sjmallett 67210284Sjmallett#ifdef CVMX_ENABLE_PKO_FUNCTIONS 68210284Sjmallett 69210284Sjmallett/** 70210284Sjmallett * Initialize the RAID block 71210284Sjmallett * 72210284Sjmallett * @param polynomial Coefficients for the RAID polynomial 73210284Sjmallett * 74210284Sjmallett * @return Zero on success, negative on failure 75210284Sjmallett */ 76210284Sjmallettint cvmx_raid_initialize(cvmx_rad_reg_polynomial_t polynomial) 77210284Sjmallett{ 78210284Sjmallett cvmx_cmd_queue_result_t result; 79210284Sjmallett cvmx_rad_reg_cmd_buf_t rad_reg_cmd_buf; 80210284Sjmallett 81210284Sjmallett cvmx_write_csr(CVMX_RAD_REG_POLYNOMIAL, polynomial.u64); 82210284Sjmallett 83210284Sjmallett result = cvmx_cmd_queue_initialize(CVMX_CMD_QUEUE_RAID, 0, 84210284Sjmallett CVMX_FPA_OUTPUT_BUFFER_POOL, 85210284Sjmallett CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE); 86210284Sjmallett if (result != CVMX_CMD_QUEUE_SUCCESS) 87210284Sjmallett return -1; 88210284Sjmallett 89210284Sjmallett rad_reg_cmd_buf.u64 = 0; 90210284Sjmallett rad_reg_cmd_buf.s.dwb = CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE/128; 91210284Sjmallett rad_reg_cmd_buf.s.pool = CVMX_FPA_OUTPUT_BUFFER_POOL; 92210284Sjmallett rad_reg_cmd_buf.s.size = CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE/8; 93210284Sjmallett rad_reg_cmd_buf.s.ptr = cvmx_ptr_to_phys(cvmx_cmd_queue_buffer(CVMX_CMD_QUEUE_RAID))>>7; 94210284Sjmallett cvmx_write_csr(CVMX_RAD_REG_CMD_BUF, rad_reg_cmd_buf.u64); 95210284Sjmallett return 0; 96210284Sjmallett} 97232812Sjmallett#ifdef CVMX_BUILD_FOR_LINUX_KERNEL 98232812SjmallettEXPORT_SYMBOL(cvmx_raid_initialize); 99232812Sjmallett#endif 100210284Sjmallett 101210284Sjmallett/** 102210284Sjmallett * Shutdown the RAID block. RAID must be idle when 103210284Sjmallett * this function is called. 104210284Sjmallett * 105210284Sjmallett * @return Zero on success, negative on failure 106210284Sjmallett */ 107210284Sjmallettint cvmx_raid_shutdown(void) 108210284Sjmallett{ 109210284Sjmallett cvmx_rad_reg_ctl_t rad_reg_ctl; 110210284Sjmallett 111210284Sjmallett if (cvmx_cmd_queue_length(CVMX_CMD_QUEUE_RAID)) 112210284Sjmallett { 113210284Sjmallett cvmx_dprintf("ERROR: cvmx_raid_shutdown: RAID not idle.\n"); 114210284Sjmallett return -1; 115210284Sjmallett } 116210284Sjmallett 117210284Sjmallett rad_reg_ctl.u64 = cvmx_read_csr(CVMX_RAD_REG_CTL); 118210284Sjmallett rad_reg_ctl.s.reset = 1; 119210284Sjmallett cvmx_write_csr(CVMX_RAD_REG_CTL, rad_reg_ctl.u64); 120210284Sjmallett cvmx_wait(100); 121210284Sjmallett 122210284Sjmallett cvmx_cmd_queue_shutdown(CVMX_CMD_QUEUE_RAID); 123210284Sjmallett cvmx_write_csr(CVMX_RAD_REG_CMD_BUF, 0); 124210284Sjmallett return 0; 125210284Sjmallett} 126232812Sjmallett#ifdef CVMX_BUILD_FOR_LINUX_KERNEL 127232812SjmallettEXPORT_SYMBOL(cvmx_raid_shutdown); 128232812Sjmallett#endif 129210284Sjmallett 130210284Sjmallett/** 131210284Sjmallett * Submit a command to the RAID block 132210284Sjmallett * 133210284Sjmallett * @param num_words Number of command words to submit 134210284Sjmallett * @param words Command words 135210284Sjmallett * 136210284Sjmallett * @return Zero on success, negative on failure 137210284Sjmallett */ 138210284Sjmallettint cvmx_raid_submit(int num_words, cvmx_raid_word_t words[]) 139210284Sjmallett{ 140210284Sjmallett cvmx_cmd_queue_result_t result = cvmx_cmd_queue_write(CVMX_CMD_QUEUE_RAID, 1, num_words, (uint64_t *)words); 141210284Sjmallett if (result == CVMX_CMD_QUEUE_SUCCESS) 142210284Sjmallett cvmx_write_csr(CVMX_ADDR_DID(CVMX_FULL_DID(14, 0)), num_words); 143210284Sjmallett return result; 144210284Sjmallett} 145232812Sjmallett#ifdef CVMX_BUILD_FOR_LINUX_KERNEL 146232812SjmallettEXPORT_SYMBOL(cvmx_raid_submit); 147210284Sjmallett#endif 148232812Sjmallett#endif 149