1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* 28 * sun4v DR Utility functions 29 */ 30 31 #include <sys/types.h> 32 #include <sys/cmn_err.h> 33 #include <sys/sunddi.h> 34 #include <sys/note.h> 35 #include <sys/sysevent.h> 36 #include <sys/sysevent/dr.h> 37 #include <sys/sysevent/eventdefs.h> 38 #include <sys/ldoms.h> 39 40 #include <sys/dr_util.h> 41 42 extern int ppvm_enable; 43 44 boolean_t 45 dr_is_disabled(dr_type_t type) 46 { 47 /* 48 * The type argument is currently unused. However, it 49 * keeps the interface flexible enough to allows for 50 * only disabling certain types of DR. 51 */ 52 _NOTE(ARGUNUSED(type)) 53 54 /* 55 * DR requires that the kernel is using its own CIF 56 * handler. If that is not the case, either because 57 * domaining has been explicitly disabled, or because 58 * the firmware does not support it, the system must 59 * remain static and DR must be disabled. 60 */ 61 if (!domaining_enabled()) { 62 cmn_err(CE_NOTE, "!Kernel CIF handler is not enabled, DR " 63 "is not available\n"); 64 return (B_TRUE); 65 } 66 67 if (type == DR_TYPE_MEM && ppvm_enable == 0) { 68 cmn_err(CE_NOTE, "!Memory DR is disabled\n"); 69 return (B_TRUE); 70 } 71 72 return (B_FALSE); 73 } 74 75 /* 76 * Generate a DR sysevent based on the type of resource and 77 * sysevent hint specified. The hint indicates whether the 78 * resource was added or removed. 79 */ 80 void 81 dr_generate_event(dr_type_t type, int se_hint) 82 { 83 int rv; 84 sysevent_id_t eid; 85 sysevent_t *ev = NULL; 86 sysevent_attr_list_t *evnt_attr_list = NULL; 87 sysevent_value_t evnt_val; 88 static char pubname[] = SUNW_KERN_PUB"dr"; 89 90 DR_DBG_ALL("generate_event: type=%s, hint=%s\n", DR_TYPE2STR(type), 91 SE_HINT2STR(se_hint)); 92 93 /* 94 * Add the attachment point attribute 95 */ 96 ev = sysevent_alloc(EC_DR, ESC_DR_AP_STATE_CHANGE, pubname, KM_SLEEP); 97 evnt_val.value_type = SE_DATA_TYPE_STRING; 98 evnt_val.value.sv_string = DR_TYPE2STR(type); 99 100 rv = sysevent_add_attr(&evnt_attr_list, DR_AP_ID, &evnt_val, KM_SLEEP); 101 if (rv != 0) { 102 DR_DBG_ALL("generate_event: failed to add attr '%s' for " 103 "'%s' event\n", DR_AP_ID, EC_DR); 104 goto done; 105 } 106 107 /* 108 * Add the DR hint attribute 109 */ 110 evnt_val.value_type = SE_DATA_TYPE_STRING; 111 evnt_val.value.sv_string = SE_HINT2STR(se_hint); 112 113 rv = sysevent_add_attr(&evnt_attr_list, DR_HINT, &evnt_val, KM_SLEEP); 114 if (rv != 0) { 115 DR_DBG_ALL("generate_event: failed to add attr '%s' for " 116 "'%s' event\n", DR_HINT, EC_DR); 117 sysevent_free_attr(evnt_attr_list); 118 goto done; 119 } 120 121 /* 122 * Attach the attribute list to the event 123 */ 124 rv = sysevent_attach_attributes(ev, evnt_attr_list); 125 if (rv != 0) { 126 DR_DBG_ALL("generate_event: failed to add attr list for " 127 "'%s' event\n", EC_DR); 128 sysevent_free_attr(evnt_attr_list); 129 goto done; 130 } 131 132 /* 133 * Log the event 134 */ 135 rv = log_sysevent(ev, KM_NOSLEEP, &eid); 136 if (rv != 0) { 137 DR_DBG_ALL("generate_event: failed to log event (%d)\n", rv); 138 } 139 140 done: 141 if (ev != NULL) 142 sysevent_free(ev); 143 } 144 145 /* 146 * Debugging Features 147 */ 148 #ifdef DEBUG 149 150 uint_t dr_debug = 0x0; 151 152 #define BYTESPERLINE 8 153 #define LINEWIDTH ((BYTESPERLINE * 3) + (BYTESPERLINE + 2) + 1) 154 #define ASCIIOFFSET ((BYTESPERLINE * 3) + 2) 155 #define ISPRINT(c) ((c >= ' ') && (c <= '~')) 156 157 /* 158 * Output a buffer formatted with a set number of bytes on 159 * each line. Append each line with the ASCII equivalent of 160 * each byte if it falls within the printable ASCII range, 161 * and '.' otherwise. 162 */ 163 void 164 dr_dbg_dump_msg(void *buf, size_t len) 165 { 166 int i, j; 167 char *msg = buf; 168 char *curr; 169 char *aoff; 170 char line[LINEWIDTH]; 171 172 /* abort if not debugging transport */ 173 if (!(dr_debug & DR_DBG_FLAG_TRANS)) { 174 return; 175 } 176 177 /* walk the buffer one line at a time */ 178 for (i = 0; i < len; i += BYTESPERLINE) { 179 180 bzero(line, LINEWIDTH); 181 182 curr = line; 183 aoff = line + ASCIIOFFSET; 184 185 /* 186 * Walk the bytes in the current line, storing 187 * the hex value for the byte as well as the 188 * ASCII representation in a temporary buffer. 189 * All ASCII values are placed at the end of 190 * the line. 191 */ 192 for (j = 0; (j < BYTESPERLINE) && ((i + j) < len); j++) { 193 (void) sprintf(curr, " %02x", msg[i + j]); 194 *aoff = (ISPRINT(msg[i + j])) ? msg[i + j] : '.'; 195 curr += 3; 196 aoff++; 197 } 198 199 /* 200 * Fill in to the start of the ASCII translation 201 * with spaces. This will only be necessary if 202 * this is the last line and there are not enough 203 * bytes to fill the whole line. 204 */ 205 while (curr != (line + ASCIIOFFSET)) 206 *curr++ = ' '; 207 208 DR_DBG_TRANS("%s\n", line); 209 } 210 } 211 #endif /* DEBUG */ 212