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 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #include <sys/psm.h> 29 #include <sys/vmem.h> 30 #include <vm/hat.h> 31 #include <sys/modctl.h> 32 #include <vm/seg_kmem.h> 33 #define PSMI_1_6 34 #include <sys/psm.h> 35 #include <sys/psm_modctl.h> 36 #include <sys/smp_impldefs.h> 37 #include <sys/reboot.h> 38 #if defined(__xpv) 39 #include <sys/hypervisor.h> 40 #include <vm/kboot_mmu.h> 41 #include <vm/hat_pte.h> 42 #endif 43 44 /* 45 * External reference functions 46 */ 47 extern void *get_next_mach(void *, char *); 48 extern void close_mach_list(void); 49 extern void open_mach_list(void); 50 51 /* 52 * from startup.c - kernel VA range allocator for device mappings 53 */ 54 extern void *device_arena_alloc(size_t size, int vm_flag); 55 extern void device_arena_free(void * vaddr, size_t size); 56 57 void psm_modloadonly(void); 58 void psm_install(void); 59 60 /* 61 * Local Function Prototypes 62 */ 63 static struct modlinkage *psm_modlinkage_alloc(struct psm_info *infop); 64 static void psm_modlinkage_free(struct modlinkage *mlinkp); 65 66 static char *psm_get_impl_module(int first); 67 68 static int mod_installpsm(struct modlpsm *modl, struct modlinkage *modlp); 69 static int mod_removepsm(struct modlpsm *modl, struct modlinkage *modlp); 70 static int mod_infopsm(struct modlpsm *modl, struct modlinkage *modlp, int *p0); 71 struct mod_ops mod_psmops = { 72 mod_installpsm, mod_removepsm, mod_infopsm 73 }; 74 75 static struct psm_sw psm_swtab = { 76 &psm_swtab, &psm_swtab, NULL, NULL 77 }; 78 79 kmutex_t psmsw_lock; /* lock accesses to psmsw */ 80 struct psm_sw *psmsw = &psm_swtab; /* start of all psm_sw */ 81 82 static struct modlinkage * 83 psm_modlinkage_alloc(struct psm_info *infop) 84 { 85 int memsz; 86 struct modlinkage *mlinkp; 87 struct modlpsm *mlpsmp; 88 struct psm_sw *swp; 89 90 memsz = sizeof (struct modlinkage) + sizeof (struct modlpsm) + 91 sizeof (struct psm_sw); 92 mlinkp = (struct modlinkage *)kmem_zalloc(memsz, KM_NOSLEEP); 93 if (!mlinkp) { 94 cmn_err(CE_WARN, "!psm_mod_init: Cannot install %s", 95 infop->p_mach_idstring); 96 return (NULL); 97 } 98 mlpsmp = (struct modlpsm *)(mlinkp + 1); 99 swp = (struct psm_sw *)(mlpsmp + 1); 100 101 mlinkp->ml_rev = MODREV_1; 102 mlinkp->ml_linkage[0] = (void *)mlpsmp; 103 mlinkp->ml_linkage[1] = (void *)NULL; 104 105 mlpsmp->psm_modops = &mod_psmops; 106 mlpsmp->psm_linkinfo = infop->p_mach_desc; 107 mlpsmp->psm_swp = swp; 108 109 swp->psw_infop = infop; 110 111 return (mlinkp); 112 } 113 114 static void 115 psm_modlinkage_free(struct modlinkage *mlinkp) 116 { 117 if (!mlinkp) 118 return; 119 120 (void) kmem_free(mlinkp, (sizeof (struct modlinkage) + 121 sizeof (struct modlpsm) + sizeof (struct psm_sw))); 122 } 123 124 int 125 psm_mod_init(void **handlepp, struct psm_info *infop) 126 { 127 struct modlinkage **modlpp = (struct modlinkage **)handlepp; 128 int status; 129 struct modlinkage *mlinkp; 130 131 if (!*modlpp) { 132 mlinkp = psm_modlinkage_alloc(infop); 133 if (!mlinkp) 134 return (ENOSPC); 135 } else 136 mlinkp = *modlpp; 137 138 status = mod_install(mlinkp); 139 if (status) { 140 psm_modlinkage_free(mlinkp); 141 *modlpp = NULL; 142 } else 143 *modlpp = mlinkp; 144 145 return (status); 146 } 147 148 /*ARGSUSED1*/ 149 int 150 psm_mod_fini(void **handlepp, struct psm_info *infop) 151 { 152 struct modlinkage **modlpp = (struct modlinkage **)handlepp; 153 int status; 154 155 status = mod_remove(*modlpp); 156 if (status == 0) { 157 psm_modlinkage_free(*modlpp); 158 *modlpp = NULL; 159 } 160 return (status); 161 } 162 163 int 164 psm_mod_info(void **handlepp, struct psm_info *infop, struct modinfo *modinfop) 165 { 166 struct modlinkage **modlpp = (struct modlinkage **)handlepp; 167 int status; 168 struct modlinkage *mlinkp; 169 170 if (!*modlpp) { 171 mlinkp = psm_modlinkage_alloc(infop); 172 if (!mlinkp) 173 return ((int)NULL); 174 } else 175 mlinkp = *modlpp; 176 177 status = mod_info(mlinkp, modinfop); 178 179 if (!status) { 180 psm_modlinkage_free(mlinkp); 181 *modlpp = NULL; 182 } else 183 *modlpp = mlinkp; 184 185 return (status); 186 } 187 188 int 189 psm_add_intr(int lvl, avfunc xxintr, char *name, int vect, caddr_t arg) 190 { 191 return (add_avintr((void *)NULL, lvl, xxintr, name, vect, 192 arg, NULL, NULL, NULL)); 193 } 194 195 int 196 psm_add_nmintr(int lvl, avfunc xxintr, char *name, caddr_t arg) 197 { 198 return (add_nmintr(lvl, xxintr, name, arg)); 199 } 200 201 processorid_t 202 psm_get_cpu_id(void) 203 { 204 return (CPU->cpu_id); 205 } 206 207 caddr_t 208 psm_map_phys_new(paddr_t addr, size_t len, int prot) 209 { 210 uint_t pgoffset; 211 paddr_t base; 212 pgcnt_t npages; 213 caddr_t cvaddr; 214 215 if (len == 0) 216 return (0); 217 218 pgoffset = addr & MMU_PAGEOFFSET; 219 #ifdef __xpv 220 /* 221 * If we're dom0, we're starting from a MA. translate that to a PA 222 * XXPV - what about driver domains??? 223 */ 224 if (DOMAIN_IS_INITDOMAIN(xen_info)) { 225 base = pfn_to_pa(xen_assign_pfn(mmu_btop(addr))) | 226 (addr & MMU_PAGEOFFSET); 227 } else { 228 base = addr; 229 } 230 #else 231 base = addr; 232 #endif 233 npages = mmu_btopr(len + pgoffset); 234 cvaddr = device_arena_alloc(ptob(npages), VM_NOSLEEP); 235 if (cvaddr == NULL) 236 return (0); 237 hat_devload(kas.a_hat, cvaddr, mmu_ptob(npages), mmu_btop(base), 238 prot, HAT_LOAD_LOCK); 239 return (cvaddr + pgoffset); 240 } 241 242 void 243 psm_unmap_phys(caddr_t addr, size_t len) 244 { 245 uint_t pgoffset; 246 caddr_t base; 247 pgcnt_t npages; 248 249 if (len == 0) 250 return; 251 252 pgoffset = (uintptr_t)addr & MMU_PAGEOFFSET; 253 base = addr - pgoffset; 254 npages = mmu_btopr(len + pgoffset); 255 hat_unload(kas.a_hat, base, ptob(npages), HAT_UNLOAD_UNLOCK); 256 device_arena_free(base, ptob(npages)); 257 } 258 259 caddr_t 260 psm_map_new(paddr_t addr, size_t len, int prot) 261 { 262 int phys_prot = PROT_READ; 263 264 ASSERT(prot == (prot & (PSM_PROT_WRITE | PSM_PROT_READ))); 265 if (prot & PSM_PROT_WRITE) 266 phys_prot |= PROT_WRITE; 267 268 return (psm_map_phys(addr, len, phys_prot)); 269 } 270 271 #undef psm_map_phys 272 #undef psm_map 273 274 caddr_t 275 psm_map_phys(uint32_t addr, size_t len, int prot) 276 { 277 return (psm_map_phys_new((paddr_t)(addr & 0xffffffff), len, prot)); 278 } 279 280 caddr_t 281 psm_map(uint32_t addr, size_t len, int prot) 282 { 283 return (psm_map_new((paddr_t)(addr & 0xffffffff), len, prot)); 284 } 285 286 void 287 psm_unmap(caddr_t addr, size_t len) 288 { 289 uint_t pgoffset; 290 caddr_t base; 291 pgcnt_t npages; 292 293 if (len == 0) 294 return; 295 296 pgoffset = (uintptr_t)addr & MMU_PAGEOFFSET; 297 base = addr - pgoffset; 298 npages = mmu_btopr(len + pgoffset); 299 hat_unload(kas.a_hat, base, ptob(npages), HAT_UNLOAD_UNLOCK); 300 device_arena_free(base, ptob(npages)); 301 } 302 303 /*ARGSUSED1*/ 304 static int 305 mod_installpsm(struct modlpsm *modl, struct modlinkage *modlp) 306 { 307 struct psm_sw *swp; 308 309 swp = modl->psm_swp; 310 mutex_enter(&psmsw_lock); 311 psmsw->psw_back->psw_forw = swp; 312 swp->psw_back = psmsw->psw_back; 313 swp->psw_forw = psmsw; 314 psmsw->psw_back = swp; 315 swp->psw_flag |= PSM_MOD_INSTALL; 316 mutex_exit(&psmsw_lock); 317 return (0); 318 } 319 320 /*ARGSUSED1*/ 321 static int 322 mod_removepsm(struct modlpsm *modl, struct modlinkage *modlp) 323 { 324 struct psm_sw *swp; 325 326 swp = modl->psm_swp; 327 mutex_enter(&psmsw_lock); 328 if (swp->psw_flag & PSM_MOD_IDENTIFY) { 329 mutex_exit(&psmsw_lock); 330 return (EBUSY); 331 } 332 if (!(swp->psw_flag & PSM_MOD_INSTALL)) { 333 mutex_exit(&psmsw_lock); 334 return (0); 335 } 336 337 swp->psw_back->psw_forw = swp->psw_forw; 338 swp->psw_forw->psw_back = swp->psw_back; 339 mutex_exit(&psmsw_lock); 340 return (0); 341 } 342 343 /*ARGSUSED1*/ 344 static int 345 mod_infopsm(struct modlpsm *modl, struct modlinkage *modlp, int *p0) 346 { 347 *p0 = (int)modl->psm_swp->psw_infop->p_owner; 348 return (0); 349 } 350 351 #if defined(__xpv) 352 #define DEFAULT_PSM_MODULE "xpv_psm" 353 #else 354 #define DEFAULT_PSM_MODULE "uppc" 355 #endif 356 357 static char * 358 psm_get_impl_module(int first) 359 { 360 static char **pnamep; 361 static char *psm_impl_module_list[] = { 362 DEFAULT_PSM_MODULE, 363 (char *)0 364 }; 365 static void *mhdl = NULL; 366 static char machname[MAXNAMELEN]; 367 368 if (first) 369 pnamep = psm_impl_module_list; 370 371 if (*pnamep != (char *)0) 372 return (*pnamep++); 373 374 mhdl = get_next_mach(mhdl, machname); 375 if (mhdl) 376 return (machname); 377 return ((char *)0); 378 } 379 380 void 381 psm_modload(void) 382 { 383 char *this; 384 385 mutex_init(&psmsw_lock, NULL, MUTEX_DEFAULT, NULL); 386 open_mach_list(); 387 388 for (this = psm_get_impl_module(1); this != (char *)NULL; 389 this = psm_get_impl_module(0)) { 390 if (modload("mach", this) == -1) 391 cmn_err(CE_WARN, "!Cannot load psm %s", this); 392 } 393 close_mach_list(); 394 } 395 396 void 397 psm_install(void) 398 { 399 struct psm_sw *swp, *cswp; 400 struct psm_ops *opsp; 401 char machstring[15]; 402 int err; 403 404 mutex_enter(&psmsw_lock); 405 for (swp = psmsw->psw_forw; swp != psmsw; ) { 406 opsp = swp->psw_infop->p_ops; 407 if (opsp->psm_probe) { 408 if ((*opsp->psm_probe)() == PSM_SUCCESS) { 409 swp->psw_flag |= PSM_MOD_IDENTIFY; 410 swp = swp->psw_forw; 411 continue; 412 } 413 } 414 /* remove the unsuccessful psm modules */ 415 cswp = swp; 416 swp = swp->psw_forw; 417 418 mutex_exit(&psmsw_lock); 419 (void) strcpy(&machstring[0], cswp->psw_infop->p_mach_idstring); 420 err = mod_remove_by_name(cswp->psw_infop->p_mach_idstring); 421 if (err) 422 cmn_err(CE_WARN, "%s: mod_remove_by_name failed %d", 423 &machstring[0], err); 424 mutex_enter(&psmsw_lock); 425 } 426 mutex_exit(&psmsw_lock); 427 (*psminitf)(); 428 } 429 430 /* 431 * Return 1 if kernel debugger is present, and 0 if not. 432 */ 433 int 434 psm_debugger(void) 435 { 436 return ((boothowto & RB_DEBUG) != 0); 437 } 438