cvmx-raid.c revision 285830
1/***********************license start*************** 2 * Copyright (c) 2003-2010 Cavium Inc. (support@cavium.com). All rights 3 * reserved. 4 * 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are 8 * met: 9 * 10 * * Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * * Redistributions in binary form must reproduce the above 14 * copyright notice, this list of conditions and the following 15 * disclaimer in the documentation and/or other materials provided 16 * with the distribution. 17 18 * * Neither the name of Cavium Inc. nor the names of 19 * its contributors may be used to endorse or promote products 20 * derived from this software without specific prior written 21 * permission. 22 23 * This Software, including technical data, may be subject to U.S. export control 24 * laws, including the U.S. Export Administration Act and its associated 25 * regulations, and may be subject to export or import regulations in other 26 * countries. 27 28 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS" 29 * AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS OR 30 * WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO 31 * THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR 32 * DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM 33 * SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE, 34 * MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF 35 * VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR 36 * CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR 37 * PERFORMANCE OF THE SOFTWARE LIES WITH YOU. 38 ***********************license end**************************************/ 39 40 41 42 43 44 45 46/** 47 * @file 48 * 49 * Interface to RAID block. This is not available on all chips. 50 * 51 * <hr>$Revision: 70030 $<hr> 52 */ 53#ifdef CVMX_BUILD_FOR_LINUX_KERNEL 54#include <linux/module.h> 55#include <asm/octeon/cvmx.h> 56#include <asm/octeon/cvmx-config.h> 57#include <asm/octeon/cvmx-cmd-queue.h> 58#include <asm/octeon/cvmx-raid.h> 59#else 60#include "executive-config.h" 61#include "cvmx-config.h" 62#include "cvmx.h" 63#include "cvmx-cmd-queue.h" 64#include "cvmx-raid.h" 65#endif 66 67#ifdef CVMX_ENABLE_PKO_FUNCTIONS 68 69/** 70 * Initialize the RAID block 71 * 72 * @param polynomial Coefficients for the RAID polynomial 73 * 74 * @return Zero on success, negative on failure 75 */ 76int cvmx_raid_initialize(cvmx_rad_reg_polynomial_t polynomial) 77{ 78 cvmx_cmd_queue_result_t result; 79 cvmx_rad_reg_cmd_buf_t rad_reg_cmd_buf; 80 81 cvmx_write_csr(CVMX_RAD_REG_POLYNOMIAL, polynomial.u64); 82 83 result = cvmx_cmd_queue_initialize(CVMX_CMD_QUEUE_RAID, 0, 84 CVMX_FPA_OUTPUT_BUFFER_POOL, 85 CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE); 86 if (result != CVMX_CMD_QUEUE_SUCCESS) 87 return -1; 88 89 rad_reg_cmd_buf.u64 = 0; 90 rad_reg_cmd_buf.s.dwb = CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE/128; 91 rad_reg_cmd_buf.s.pool = CVMX_FPA_OUTPUT_BUFFER_POOL; 92 rad_reg_cmd_buf.s.size = CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE/8; 93 rad_reg_cmd_buf.s.ptr = cvmx_ptr_to_phys(cvmx_cmd_queue_buffer(CVMX_CMD_QUEUE_RAID))>>7; 94 cvmx_write_csr(CVMX_RAD_REG_CMD_BUF, rad_reg_cmd_buf.u64); 95 return 0; 96} 97#ifdef CVMX_BUILD_FOR_LINUX_KERNEL 98EXPORT_SYMBOL(cvmx_raid_initialize); 99#endif 100 101/** 102 * Shutdown the RAID block. RAID must be idle when 103 * this function is called. 104 * 105 * @return Zero on success, negative on failure 106 */ 107int cvmx_raid_shutdown(void) 108{ 109 cvmx_rad_reg_ctl_t rad_reg_ctl; 110 111 if (cvmx_cmd_queue_length(CVMX_CMD_QUEUE_RAID)) 112 { 113 cvmx_dprintf("ERROR: cvmx_raid_shutdown: RAID not idle.\n"); 114 return -1; 115 } 116 117 rad_reg_ctl.u64 = cvmx_read_csr(CVMX_RAD_REG_CTL); 118 rad_reg_ctl.s.reset = 1; 119 cvmx_write_csr(CVMX_RAD_REG_CTL, rad_reg_ctl.u64); 120 cvmx_wait(100); 121 122 cvmx_cmd_queue_shutdown(CVMX_CMD_QUEUE_RAID); 123 cvmx_write_csr(CVMX_RAD_REG_CMD_BUF, 0); 124 return 0; 125} 126#ifdef CVMX_BUILD_FOR_LINUX_KERNEL 127EXPORT_SYMBOL(cvmx_raid_shutdown); 128#endif 129 130/** 131 * Submit a command to the RAID block 132 * 133 * @param num_words Number of command words to submit 134 * @param words Command words 135 * 136 * @return Zero on success, negative on failure 137 */ 138int cvmx_raid_submit(int num_words, cvmx_raid_word_t words[]) 139{ 140 cvmx_cmd_queue_result_t result = cvmx_cmd_queue_write(CVMX_CMD_QUEUE_RAID, 1, num_words, (uint64_t *)words); 141 if (result == CVMX_CMD_QUEUE_SUCCESS) 142 cvmx_write_csr(CVMX_ADDR_DID(CVMX_FULL_DID(14, 0)), num_words); 143 return result; 144} 145#ifdef CVMX_BUILD_FOR_LINUX_KERNEL 146EXPORT_SYMBOL(cvmx_raid_submit); 147#endif 148#endif 149