1 /*- 2 * BSD LICENSE 3 * 4 * Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>. 5 * Copyright (c) Intel Corporation. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * * Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * * Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the 17 * distribution. 18 * * Neither the name of Intel Corporation nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 25 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 26 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 28 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 32 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include "scsi_internal.h" 36 37 #include "spdk/conf.h" 38 39 #include "spdk_internal/event.h" 40 41 #define DEFAULT_MAX_UNMAP_LBA_COUNT 4194304 42 #define DEFAULT_MAX_UNMAP_BLOCK_DESCRIPTOR_COUNT 1 43 #define DEFAULT_OPTIMAL_UNMAP_GRANULARITY 0 44 #define DEFAULT_UNMAP_GRANULARITY_ALIGNMENT 0 45 #define DEFAULT_UGAVALID 0 46 #define DEFAULT_MAX_WRITE_SAME_LENGTH 512 47 48 struct spdk_scsi_globals g_spdk_scsi; 49 50 static void 51 spdk_set_default_scsi_parameters(void) 52 { 53 g_spdk_scsi.scsi_params.max_unmap_lba_count = DEFAULT_MAX_UNMAP_LBA_COUNT; 54 g_spdk_scsi.scsi_params.max_unmap_block_descriptor_count = 55 DEFAULT_MAX_UNMAP_BLOCK_DESCRIPTOR_COUNT; 56 g_spdk_scsi.scsi_params.optimal_unmap_granularity = 57 DEFAULT_OPTIMAL_UNMAP_GRANULARITY; 58 g_spdk_scsi.scsi_params.unmap_granularity_alignment = 59 DEFAULT_UNMAP_GRANULARITY_ALIGNMENT; 60 g_spdk_scsi.scsi_params.ugavalid = DEFAULT_UGAVALID; 61 g_spdk_scsi.scsi_params.max_write_same_length = DEFAULT_MAX_WRITE_SAME_LENGTH; 62 } 63 64 static int 65 spdk_read_config_scsi_parameters(void) 66 { 67 struct spdk_conf_section *sp; 68 const char *val; 69 70 sp = spdk_conf_find_section(NULL, "Scsi"); 71 if (sp == NULL) { 72 spdk_set_default_scsi_parameters(); 73 return 0; 74 } 75 76 val = spdk_conf_section_get_val(sp, "MaxUnmapLbaCount"); 77 g_spdk_scsi.scsi_params.max_unmap_lba_count = (val == NULL) ? 78 DEFAULT_MAX_UNMAP_LBA_COUNT : strtoul(val, NULL, 10); 79 80 val = spdk_conf_section_get_val(sp, "MaxUnmapBlockDescriptorCount"); 81 g_spdk_scsi.scsi_params.max_unmap_block_descriptor_count = (val == NULL) ? 82 DEFAULT_MAX_UNMAP_BLOCK_DESCRIPTOR_COUNT : strtoul(val, NULL, 10); 83 val = spdk_conf_section_get_val(sp, "OptimalUnmapGranularity"); 84 g_spdk_scsi.scsi_params.optimal_unmap_granularity = (val == NULL) ? 85 DEFAULT_OPTIMAL_UNMAP_GRANULARITY : strtoul(val, NULL, 10); 86 87 val = spdk_conf_section_get_val(sp, "UnmapGranularityAlignment"); 88 g_spdk_scsi.scsi_params.unmap_granularity_alignment = (val == NULL) ? 89 DEFAULT_UNMAP_GRANULARITY_ALIGNMENT : strtoul(val, NULL, 10); 90 91 val = spdk_conf_section_get_val(sp, "Ugavalid"); 92 if (val == NULL) { 93 g_spdk_scsi.scsi_params.ugavalid = DEFAULT_UGAVALID; 94 } else if (strcasecmp(val, "Yes") == 0) { 95 g_spdk_scsi.scsi_params.ugavalid = 1; 96 } else if (strcasecmp(val, "No") == 0) { 97 g_spdk_scsi.scsi_params.ugavalid = 0; 98 } else { 99 SPDK_ERRLOG("unknown value %s\n", val); 100 return -1; 101 } 102 103 val = spdk_conf_section_get_val(sp, "MaxWriteSameLength"); 104 g_spdk_scsi.scsi_params.max_write_same_length = (val == NULL) ? 105 DEFAULT_MAX_WRITE_SAME_LENGTH : strtoul(val, NULL, 10); 106 107 return 0; 108 } 109 110 static int 111 spdk_scsi_subsystem_init(void) 112 { 113 int rc; 114 115 rc = pthread_mutex_init(&g_spdk_scsi.mutex, NULL); 116 if (rc != 0) { 117 SPDK_ERRLOG("mutex_init() failed\n"); 118 return -1; 119 } 120 121 rc = spdk_read_config_scsi_parameters(); 122 if (rc < 0) { 123 SPDK_ERRLOG("spdk_scsi_parameters() failed\n"); 124 return -1; 125 } 126 127 return rc; 128 } 129 130 static int 131 spdk_scsi_subsystem_fini(void) 132 { 133 pthread_mutex_destroy(&g_spdk_scsi.mutex); 134 return 0; 135 } 136 137 SPDK_TRACE_REGISTER_FN(scsi_trace) 138 { 139 spdk_trace_register_owner(OWNER_SCSI_DEV, 'd'); 140 spdk_trace_register_object(OBJECT_SCSI_TASK, 't'); 141 spdk_trace_register_description("SCSI TASK DONE", "", TRACE_SCSI_TASK_DONE, 142 OWNER_SCSI_DEV, OBJECT_SCSI_TASK, 0, 0, 0, ""); 143 spdk_trace_register_description("SCSI TASK START", "", TRACE_SCSI_TASK_START, 144 OWNER_SCSI_DEV, OBJECT_SCSI_TASK, 0, 0, 0, ""); 145 } 146 147 SPDK_SUBSYSTEM_REGISTER(scsi, spdk_scsi_subsystem_init, spdk_scsi_subsystem_fini, NULL) 148 SPDK_SUBSYSTEM_DEPEND(scsi, bdev) 149 150 SPDK_LOG_REGISTER_TRACE_FLAG("scsi", SPDK_TRACE_SCSI) 151