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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <sys/debug.h> 30 #include <sys/types.h> 31 #include <sys/errno.h> 32 #include <sys/cred.h> 33 #include <sys/dditypes.h> 34 #include <sys/sunddi.h> 35 #include <sys/sunndi.h> 36 #include <sys/ddi.h> 37 #include <sys/ddi_impldefs.h> 38 #include <sys/ndi_impldefs.h> 39 #include <sys/kmem.h> 40 #include <sys/note.h> 41 42 #include <sys/sbdpriv.h> 43 #include <sys/sbd_io.h> 44 #include <sys/machsystm.h> 45 46 47 extern void sbd_errno_decode(int err, sbderror_t *ep, dev_info_t *dip); 48 extern sbd_state_t ostate_cvt(sbd_istate_t); 49 50 /* 51 * Given a dev_info_t of a branch root, walk down the 52 * branch to attach drivers 53 */ 54 /*ARGSUSED*/ 55 void 56 sbd_attach_io(sbd_handle_t *hp, sbderror_t *ep, dev_info_t *dip, int unit) 57 { 58 sbd_board_t *sbp = SBDH2BD(hp->h_sbd); 59 60 ASSERT(e_ddi_branch_held(dip)); 61 62 (void) e_ddi_branch_configure(dip, NULL, 0); 63 64 ASSERT(sbp->sb_iopath[unit] != NULL); 65 66 (void) ddi_pathname(dip, sbp->sb_iopath[unit]); 67 } 68 69 /* 70 * remove device nodes for the branch indicated by dip 71 * Hold the status lock so that status can safely do ddi_pathname(). 72 */ 73 /*ARGSUSED*/ 74 void 75 sbd_detach_io(sbd_handle_t *hp, sbderror_t *ep, dev_info_t *dip, int unit) 76 { 77 int rv; 78 dev_info_t *fdip = NULL; 79 sbd_board_t *sbp = SBDH2BD(hp->h_sbd); 80 81 ASSERT(e_ddi_branch_held(dip)); 82 mutex_enter(&sbp->sb_slock); 83 rv = e_ddi_branch_unconfigure(dip, &fdip, DEVI_BRANCH_EVENT); 84 mutex_exit(&sbp->sb_slock); 85 if (rv) { 86 /* 87 * If non-NULL, fdip is returned held and must be released. 88 */ 89 if (fdip != NULL) { 90 sbd_errno_decode(rv, ep, fdip); 91 ddi_release_devi(fdip); 92 } else { 93 sbd_errno_decode(rv, ep, dip); 94 } 95 } 96 } 97 98 /*ARGSUSED*/ 99 void 100 sbd_init_io_unit(sbd_board_t *sbp, int unit) 101 { 102 sbd_istate_t new_state; 103 sbd_io_unit_t *ip; 104 dev_info_t *dip; 105 106 ip = SBD_GET_BOARD_IOUNIT(sbp, unit); 107 108 if (SBD_DEV_IS_ATTACHED(sbp, SBD_COMP_IO, unit)) { 109 new_state = SBD_STATE_CONFIGURED; 110 } else if (SBD_DEV_IS_PRESENT(sbp, SBD_COMP_IO, unit)) { 111 new_state = SBD_STATE_CONNECTED; 112 } else { 113 new_state = SBD_STATE_EMPTY; 114 } 115 dip = sbp->sb_devlist[NIX(SBD_COMP_IO)][unit]; 116 ip->sbi_cm.sbdev_cond = sbd_get_comp_cond(dip); 117 118 /* 119 * Any changes to this io component should be performed above 120 * this call to ensure the component is fully initialized 121 * before transitioning to the new state. 122 */ 123 SBD_DEVICE_TRANSITION(sbp, SBD_COMP_IO, unit, new_state); 124 } 125 126 /*ARGSUSED*/ 127 int 128 sbd_disconnect_io(sbd_handle_t *hp, int unit) 129 { 130 return (0); 131 } 132 133 int 134 sbd_pre_attach_io(sbd_handle_t *hp, sbd_devlist_t *devlist, int devnum) 135 { 136 _NOTE(ARGUNUSED(hp)) 137 _NOTE(ARGUNUSED(devlist)) 138 _NOTE(ARGUNUSED(devnum)) 139 140 return (0); 141 } 142 143 /*ARGSUSED*/ 144 int 145 sbd_pre_detach_io(sbd_handle_t *hp, sbd_devlist_t *devlist, int devnum) 146 { 147 fn_t f = "sbd_pre_detach_io"; 148 149 PR_IO("%s...\n", f); 150 151 if (devnum <= 0) 152 return (-1); 153 154 /* fail if any I/O devices are referenced */ 155 if (sbd_check_io_refs(hp, devlist, devnum) > 0) { 156 PR_IO("%s: failed - I/O devices ref'd\n", f); 157 return (-1); 158 } 159 160 return (0); 161 } 162 163 /*ARGSUSED*/ 164 int 165 sbd_post_attach_io(sbd_handle_t *hp, sbd_devlist_t *devlist, int devnum) 166 { 167 _NOTE(ARGUNUSED(hp)) 168 _NOTE(ARGUNUSED(devlist)) 169 _NOTE(ARGUNUSED(devnum)) 170 171 return (0); 172 } 173 174 /*ARGSUSED*/ 175 int 176 sbd_post_detach_io(sbd_handle_t *hp, sbd_devlist_t *devlist, int devnum) 177 { 178 return (0); 179 } 180 181 /*ARGSUSED*/ 182 int 183 sbd_io_status(sbd_handle_t *hp, sbd_devset_t devset, sbd_dev_stat_t *dsp) 184 { 185 int i, ix; 186 sbd_board_t *sbp; 187 sbd_io_stat_t *isp; 188 sbd_io_unit_t *ip; 189 sbd_istate_t dstate; 190 sbdp_handle_t *hdp; 191 sbderror_t *ep; 192 sbd_error_t *sep; 193 194 /* 195 * Only look for requested devices that are actually present. 196 */ 197 sbp = SBDH2BD(hp->h_sbd); 198 199 ep = HD2MACHERR(hp); 200 sep = kmem_zalloc(sizeof (sbd_error_t), KM_SLEEP); 201 hdp = sbd_get_sbdp_handle(sbp, hp); 202 203 /* 204 * Concurrent status and unconfigure, disconnect are allowed. 205 * To prevent DR code from accessing stale dips, check the 206 * present devset and access the dips with status lock held. 207 * Disconnect and unconfigure code change dip state with 208 * status lock (sb_slock) held. 209 */ 210 mutex_enter(&sbp->sb_slock); 211 212 devset &= SBD_DEVS_PRESENT(sbp); 213 214 for (i = ix = 0; i < MAX_IO_UNITS_PER_BOARD; i++) { 215 dev_info_t *dip; 216 int unit; 217 int namelen; 218 int refcount = 0; 219 220 if (DEVSET_IN_SET(devset, SBD_COMP_IO, i) == 0) 221 continue; 222 /* 223 * Check to make sure the io component is in a state 224 * where its fully initialized. 225 */ 226 if (SBD_DEVICE_STATE(sbp, SBD_COMP_IO, i) == SBD_STATE_EMPTY) 227 continue; 228 229 dip = sbp->sb_devlist[NIX(SBD_COMP_IO)][i]; 230 if (dip == NULL) 231 continue; 232 233 isp = &dsp->d_io; 234 235 bzero((caddr_t)isp, sizeof (*isp)); 236 namelen = sizeof (isp->is_name); 237 (void) ddi_getlongprop_buf(DDI_DEV_T_ANY, dip, 238 DDI_PROP_DONTPASS, OBP_DEVICETYPE, 239 (caddr_t)isp->is_name, &namelen); 240 241 isp->is_unit = sbdp_get_unit_num(hdp, dip); 242 if (isp->is_unit < 0) { 243 if (hp->h_flags & SBD_IOCTL_FLAG_FORCE) 244 continue; 245 else { 246 SBD_GET_PERR(hdp->h_err, SBD_HD2ERR(hp)); 247 break; 248 } 249 } 250 unit = isp->is_unit; 251 252 dstate = SBD_DEVICE_STATE(sbp, SBD_COMP_IO, unit); 253 isp->is_ostate = ostate_cvt(dstate); 254 isp->is_type = SBD_COMP_IO; 255 ip = SBD_GET_BOARD_IOUNIT(sbp, unit); 256 isp->is_cm.c_cond = ip->sbi_cm.sbdev_cond; 257 isp->is_cm.c_busy = ip->sbi_cm.sbdev_busy; 258 isp->is_cm.c_time = ip->sbi_cm.sbdev_time; 259 260 261 /* 262 * This is safe to do as unconfigure and disconnect 263 * hold the status lock while changing dip state. 264 */ 265 (void) ddi_pathname(dip, isp->is_pathname); 266 267 /* 268 * We use a dummy handle in which to collect 269 * the major numbers of unsafe devices. 270 */ 271 sbdp_check_devices(dip, &refcount, sep); 272 273 isp->is_referenced = (refcount == 0) ? 0 : 1; 274 275 isp->is_unsafe_count = 0; 276 277 /* 278 * Reset error field since we don't care about 279 * errors at this level. The unsafe devices 280 * will be reported in the structure. 281 */ 282 SBD_SET_ERR(ep, ESBD_NOERROR); 283 ep->e_rsc[0] = '\0'; 284 285 ix++; 286 dsp++; 287 } 288 289 mutex_exit(&sbp->sb_slock); 290 291 kmem_free(sep, sizeof (sbd_error_t)); 292 sbd_release_sbdp_handle(hdp); 293 294 return (ix); 295 } 296 297 /*ARGSUSED*/ 298 int 299 sbd_io_cnt(sbd_handle_t *hp, sbd_devset_t devset) 300 { 301 int i, ix; 302 sbd_board_t *sbp; 303 304 sbp = SBDH2BD(hp->h_sbd); 305 306 /* 307 * Only look for requested devices that are actually present. 308 */ 309 devset &= SBD_DEVS_PRESENT(sbp); 310 311 for (i = ix = 0; i < MAX_IO_UNITS_PER_BOARD; i++) { 312 dev_info_t *dip; 313 314 if (DEVSET_IN_SET(devset, SBD_COMP_IO, i) == 0) 315 continue; 316 317 dip = sbp->sb_devlist[NIX(SBD_COMP_IO)][i]; 318 if (dip == NULL) 319 continue; 320 321 ix++; 322 } 323 324 return (ix); 325 } 326 327 int 328 sbd_check_io_refs(sbd_handle_t *hp, sbd_devlist_t devlist[], int devnum) 329 { 330 register int i, reftotal = 0; 331 fn_t f = "sbd_check_io_refs"; 332 sbd_error_t *sep; 333 sbderror_t *ep; 334 335 sep = kmem_zalloc(sizeof (sbd_error_t), KM_SLEEP); 336 ep = HD2MACHERR(hp); 337 338 for (i = 0; i < devnum; i++) { 339 dev_info_t *dip; 340 int ref; 341 342 dip = devlist[i].dv_dip; 343 ref = 0; 344 sbdp_check_devices(dip, &ref, sep); 345 if (ref) { 346 if (SBD_GET_ERR(ep) == 0) { 347 SBD_GET_PERR(sep, ep); 348 } 349 SBD_GET_PERR(sep, &devlist[i].dv_error); 350 } 351 PR_IO("%s: dip(%s) ref = %d\n", 352 f, ddi_get_name(dip), ref); 353 reftotal += ref; 354 } 355 356 kmem_free(sep, sizeof (sbd_error_t)); 357 358 return (reftotal); 359 } 360 361 int 362 sbd_check_io_attached(dev_info_t *dip, void *arg) 363 { 364 dev_info_t **tdip; 365 366 tdip = (dev_info_t **)arg; 367 368 if (dip == *tdip) { 369 int state; 370 371 state = ddi_get_devstate(dip); 372 if (i_ddi_devi_attached(dip) || (state == DDI_DEVSTATE_UP)) { 373 *tdip = NULL; 374 return (DDI_WALK_TERMINATE); 375 } 376 } 377 return (DDI_WALK_CONTINUE); 378 } 379 380 int 381 sbd_pre_release_io(sbd_handle_t *hp, 382 sbd_devlist_t *devlist, int devnum) 383 { 384 fn_t f = "sbd_pre_release_io"; 385 int rv = 0; 386 int i; 387 388 ASSERT(devnum > 0); 389 390 /* fail if any I/O devices are referenced */ 391 if ((rv = sbd_check_io_refs(hp, devlist, devnum)) > 0) { 392 /* 393 * One of the devices may have failed check to see which 394 * and set in the main handle 395 */ 396 for (i = 0; i < devnum; i++) { 397 if (SBD_GET_ERR(&devlist[i].dv_error) != 0) { 398 (void) sbd_set_err_in_hdl(hp, 399 &devlist[i].dv_error); 400 break; 401 } 402 } 403 PR_IO("%s: failed - I/O devices ref'd\n", f); 404 } 405 406 return (rv); 407 } 408