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 2005 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/types.h> 30 #include <sys/conf.h> 31 #include <sys/cmn_err.h> 32 #include <sys/kmem.h> 33 #include <sys/open.h> 34 #include <sys/stat.h> 35 #include <sys/modctl.h> 36 #include <sys/errno.h> 37 #include <sys/ddi.h> 38 #include <sys/sunddi.h> 39 40 /* #define SBUSMEM_DEBUG */ 41 42 #ifdef SBUSMEM_DEBUG 43 #include <sys/ddi_impldefs.h> 44 45 int sbusmem_debug_flag; 46 #define sbusmem_debug if (sbusmem_debug_flag) printf 47 #endif /* SBUSMEM_DEBUG */ 48 49 static void *sbusmem_state_head; 50 51 struct sbusmem_unit { 52 uint_t size; 53 uint_t pagesize; 54 dev_info_t *dip; 55 }; 56 57 static int sbmem_open(dev_t *, int, int, cred_t *); 58 static int sbmem_close(dev_t, int, int, struct cred *); 59 static int sbmem_read(dev_t, struct uio *, cred_t *); 60 static int sbmem_write(dev_t, struct uio *, cred_t *); 61 static int sbmem_devmap(dev_t, devmap_cookie_t, offset_t, size_t, 62 size_t *, uint_t); 63 64 static struct cb_ops sbmem_cb_ops = { 65 sbmem_open, /* open */ 66 sbmem_close, /* close */ 67 nodev, /* strategy */ 68 nodev, /* print */ 69 nodev, /* dump */ 70 sbmem_read, /* read */ 71 sbmem_write, /* write */ 72 nodev, /* ioctl */ 73 sbmem_devmap, /* devmap */ 74 nodev, /* mmap */ 75 ddi_devmap_segmap, /* segmap */ 76 nochpoll, /* poll */ 77 ddi_prop_op, /* cb_prop_op */ 78 0, /* streamtab */ 79 D_NEW|D_MP|D_DEVMAP|D_HOTPLUG, /* Driver compatibility flag */ 80 CB_REV, /* rev */ 81 nodev, /* int (*cb_aread)() */ 82 nodev /* int (*cb_awrite)() */ 83 }; 84 85 static int sbmem_attach(dev_info_t *, ddi_attach_cmd_t); 86 static int sbmem_detach(dev_info_t *, ddi_detach_cmd_t); 87 static int sbmem_info(dev_info_t *, ddi_info_cmd_t, void *, void **); 88 89 static struct dev_ops sbmem_ops = { 90 DEVO_REV, /* devo_rev, */ 91 0, /* refcnt */ 92 sbmem_info, /* get_dev_info */ 93 nulldev, /* identify */ 94 nulldev, /* probe */ 95 sbmem_attach, /* attach */ 96 sbmem_detach, /* detach */ 97 nodev, /* reset */ 98 &sbmem_cb_ops, /* driver operations */ 99 (struct bus_ops *)0, /* bus operations */ 100 nulldev /* power */ 101 }; 102 103 static struct modldrv modldrv = { 104 &mod_driverops, /* Type of module. This one is a driver */ 105 "SBus memory driver v%I%", /* Name of module. */ 106 &sbmem_ops, /* driver ops */ 107 }; 108 109 static struct modlinkage modlinkage = { 110 MODREV_1, (void *)&modldrv, NULL 111 }; 112 113 static int sbmem_rw(dev_t, struct uio *, enum uio_rw, cred_t *); 114 115 #if !defined(lint) 116 static char sbusmem_initmsg[] = "sbusmem _init: sbusmem.c\t%I%\t%E%\n"; 117 #endif 118 119 int 120 _init(void) 121 { 122 int error; 123 124 if ((error = ddi_soft_state_init(&sbusmem_state_head, 125 sizeof (struct sbusmem_unit), 1)) != 0) { 126 return (error); 127 } 128 if ((error = mod_install(&modlinkage)) != 0) { 129 ddi_soft_state_fini(&sbusmem_state_head); 130 } 131 return (error); 132 } 133 134 int 135 _fini(void) 136 { 137 int error; 138 139 if ((error = mod_remove(&modlinkage)) == 0) { 140 ddi_soft_state_fini(&sbusmem_state_head); 141 } 142 return (error); 143 } 144 145 int 146 _info(struct modinfo *modinfop) 147 { 148 return (mod_info(&modlinkage, modinfop)); 149 } 150 151 static int 152 sbmem_attach(dev_info_t *devi, ddi_attach_cmd_t cmd) 153 { 154 struct sbusmem_unit *un; 155 int error = DDI_FAILURE; 156 int instance, ilen; 157 uint_t size; 158 char *ident; 159 160 switch (cmd) { 161 case DDI_ATTACH: 162 instance = ddi_get_instance(devi); 163 164 size = ddi_getprop(DDI_DEV_T_NONE, devi, 165 DDI_PROP_DONTPASS | DDI_PROP_CANSLEEP, "size", -1); 166 if (size == (uint_t)-1) { 167 #ifdef SBUSMEM_DEBUG 168 sbusmem_debug( 169 "sbmem_attach%d: No size property\n", instance); 170 #endif /* SBUSMEM_DEBUG */ 171 break; 172 } 173 174 #ifdef SBUSMEM_DEBUG 175 { 176 struct regspec *rp = ddi_rnumber_to_regspec(devi, 0); 177 178 if (rp == NULL) { 179 sbusmem_debug( 180 "sbmem_attach%d: No reg property\n", instance); 181 } else { 182 sbusmem_debug( 183 "sbmem_attach%d: slot 0x%x size 0x%x\n", instance, 184 rp->regspec_bustype, rp->regspec_size); 185 } 186 } 187 #endif /* SBUSMEM_DEBUG */ 188 189 if (ddi_getlongprop(DDI_DEV_T_ANY, devi, 190 DDI_PROP_DONTPASS | DDI_PROP_CANSLEEP, "ident", 191 (caddr_t)&ident, &ilen) != DDI_PROP_SUCCESS) { 192 #ifdef SBUSMEM_DEBUG 193 sbusmem_debug( 194 "sbmem_attach%d: No ident property\n", instance); 195 #endif /* SBUSMEM_DEBUG */ 196 break; 197 } 198 199 if (ddi_soft_state_zalloc(sbusmem_state_head, 200 instance) != DDI_SUCCESS) 201 break; 202 203 if ((un = ddi_get_soft_state(sbusmem_state_head, 204 instance)) == NULL) { 205 ddi_soft_state_free(sbusmem_state_head, instance); 206 break; 207 } 208 209 if (ddi_create_minor_node(devi, ident, S_IFCHR, instance, 210 DDI_PSEUDO, NULL) == DDI_FAILURE) { 211 kmem_free(ident, ilen); 212 ddi_remove_minor_node(devi, NULL); 213 ddi_soft_state_free(sbusmem_state_head, instance); 214 break; 215 } 216 kmem_free(ident, ilen); 217 un->dip = devi; 218 un->size = size; 219 un->pagesize = ddi_ptob(devi, 1); 220 221 #ifdef SBUSMEM_DEBUG 222 sbusmem_debug("sbmem_attach%d: dip 0x%p size 0x%x\n", 223 instance, devi, size); 224 #endif /* SBUSMEM_DEBUG */ 225 226 ddi_report_dev(devi); 227 error = DDI_SUCCESS; 228 break; 229 case DDI_RESUME: 230 error = DDI_SUCCESS; 231 break; 232 default: 233 break; 234 } 235 return (error); 236 } 237 238 static int 239 sbmem_detach(dev_info_t *devi, ddi_detach_cmd_t cmd) 240 { 241 int instance; 242 243 switch (cmd) { 244 case DDI_DETACH: 245 instance = ddi_get_instance(devi); 246 ddi_remove_minor_node(devi, NULL); 247 ddi_soft_state_free(sbusmem_state_head, instance); 248 return (DDI_SUCCESS); 249 250 case DDI_SUSPEND: 251 return (DDI_SUCCESS); 252 } 253 return (DDI_FAILURE); 254 } 255 256 /*ARGSUSED1*/ 257 static int 258 sbmem_open(dev_t *devp, int flag, int typ, cred_t *cred) 259 { 260 int instance; 261 262 if (typ != OTYP_CHR) 263 return (EINVAL); 264 265 instance = getminor(*devp); 266 if (ddi_get_soft_state(sbusmem_state_head, instance) == NULL) { 267 return (ENXIO); 268 } 269 return (0); 270 } 271 272 /*ARGSUSED*/ 273 static int 274 sbmem_close(dev_t dev, int flag, int otyp, struct cred *cred) 275 { 276 if (otyp != OTYP_CHR) 277 return (EINVAL); 278 279 return (0); 280 } 281 282 static int 283 sbmem_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result) 284 { 285 int instance, error = DDI_FAILURE; 286 struct sbusmem_unit *un; 287 288 #if defined(lint) || defined(__lint) 289 dip = dip; 290 #endif /* lint || __lint */ 291 292 switch (infocmd) { 293 case DDI_INFO_DEVT2DEVINFO: 294 instance = getminor((dev_t)arg); 295 if ((un = ddi_get_soft_state(sbusmem_state_head, 296 instance)) != NULL) { 297 *result = (void *)un->dip; 298 error = DDI_SUCCESS; 299 #ifdef SBUSMEM_DEBUG 300 sbusmem_debug( 301 "sbmem_info%d: returning dip 0x%p\n", instance, un->dip); 302 #endif /* SBUSMEM_DEBUG */ 303 304 } 305 break; 306 307 case DDI_INFO_DEVT2INSTANCE: 308 instance = getminor((dev_t)arg); 309 *result = (void *)(uintptr_t)instance; 310 error = DDI_SUCCESS; 311 break; 312 313 default: 314 break; 315 } 316 return (error); 317 } 318 319 static int 320 sbmem_read(dev_t dev, struct uio *uio, cred_t *cred) 321 { 322 return (sbmem_rw(dev, uio, UIO_READ, cred)); 323 } 324 325 static int 326 sbmem_write(dev_t dev, struct uio *uio, cred_t *cred) 327 { 328 return (sbmem_rw(dev, uio, UIO_WRITE, cred)); 329 } 330 331 static int 332 sbmem_rw(dev_t dev, struct uio *uio, enum uio_rw rw, cred_t *cred) 333 { 334 uint_t c; 335 struct iovec *iov; 336 struct sbusmem_unit *un; 337 uint_t pagesize, msize; 338 int instance, error = 0; 339 dev_info_t *dip; 340 caddr_t reg; 341 342 #if defined(lint) || defined(__lint) 343 cred = cred; 344 #endif /* lint || __lint */ 345 346 instance = getminor(dev); 347 if ((un = ddi_get_soft_state(sbusmem_state_head, instance)) == NULL) { 348 return (ENXIO); 349 } 350 dip = un->dip; 351 pagesize = un->pagesize; 352 353 while (uio->uio_resid > 0 && error == 0) { 354 iov = uio->uio_iov; 355 if (iov->iov_len == 0) { 356 uio->uio_iov++; 357 uio->uio_iovcnt--; 358 if (uio->uio_iovcnt < 0) 359 cmn_err(CE_PANIC, "sbmem_rw"); 360 continue; 361 } 362 363 if (uio->uio_offset > un->size) { 364 return (EFAULT); 365 } 366 367 if (uio->uio_offset == un->size) { 368 return (0); /* EOF */ 369 } 370 msize = pagesize - (uio->uio_offset & (pagesize - 1)); 371 if (ddi_map_regs(dip, 0, ®, uio->uio_offset, 372 (off_t)msize) != DDI_SUCCESS) { 373 return (EFAULT); 374 } 375 c = min(msize, (uint_t)iov->iov_len); 376 if (ddi_peekpokeio(dip, uio, rw, reg, (int)c, 377 sizeof (int)) != DDI_SUCCESS) 378 error = EFAULT; 379 380 ddi_unmap_regs(dip, 0, ®, uio->uio_offset, (off_t)msize); 381 } 382 return (error); 383 } 384 385 static int 386 sbmem_devmap(dev_t dev, devmap_cookie_t dhp, offset_t off, size_t len, 387 size_t *maplen, uint_t model) 388 { 389 struct sbusmem_unit *un; 390 int instance, error; 391 392 #if defined(lint) || defined(__lint) 393 model = model; 394 #endif /* lint || __lint */ 395 396 instance = getminor(dev); 397 if ((un = ddi_get_soft_state(sbusmem_state_head, instance)) == NULL) { 398 return (ENXIO); 399 } 400 if (off + len > un->size) { 401 return (ENXIO); 402 } 403 if ((error = devmap_devmem_setup(dhp, un->dip, NULL, 0, 404 off, len, PROT_ALL, DEVMAP_DEFAULTS, NULL)) < 0) { 405 return (error); 406 } 407 *maplen = ptob(btopr(len)); 408 return (0); 409 } 410