1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate /* 30*0Sstevel@tonic-gate * Ramdisk device driver. 31*0Sstevel@tonic-gate * 32*0Sstevel@tonic-gate * There are two types of ramdisk: 'real' OBP-created ramdisks, and 'pseudo' 33*0Sstevel@tonic-gate * ramdisks created at runtime with no corresponding OBP device node. The 34*0Sstevel@tonic-gate * ramdisk(7D) driver is capable of dealing with both, and with the creation 35*0Sstevel@tonic-gate * and deletion of 'pseudo' ramdisks. 36*0Sstevel@tonic-gate * 37*0Sstevel@tonic-gate * Every ramdisk has a single 'state' structure which maintains data for 38*0Sstevel@tonic-gate * that ramdisk, and is assigned a single minor number. The bottom 10-bits 39*0Sstevel@tonic-gate * of the minor number index the state structures; the top 8-bits give a 40*0Sstevel@tonic-gate * 'real OBP disk' number, i.e. they are zero for 'pseudo' ramdisks. Thus 41*0Sstevel@tonic-gate * it is possible to distinguish 'real' from 'pseudo' ramdisks using the 42*0Sstevel@tonic-gate * top 8-bits of the minor number. 43*0Sstevel@tonic-gate * 44*0Sstevel@tonic-gate * Each OBP-created ramdisk has its own node in the device tree with an 45*0Sstevel@tonic-gate * "existing" property which describes the one-or-more physical address ranges 46*0Sstevel@tonic-gate * assigned to the ramdisk. All 'pseudo' ramdisks share a common devinfo 47*0Sstevel@tonic-gate * structure. 48*0Sstevel@tonic-gate * 49*0Sstevel@tonic-gate * A single character device node is used by ramdiskadm(1M) to communicate 50*0Sstevel@tonic-gate * with the ramdisk driver, with minor number 0: 51*0Sstevel@tonic-gate * 52*0Sstevel@tonic-gate * /dev/ramdiskctl -> /devices/pseudo/ramdisk@0:ctl 53*0Sstevel@tonic-gate * 54*0Sstevel@tonic-gate * For consistent access, block and raw device nodes are created for *every* 55*0Sstevel@tonic-gate * ramdisk. For 'pseudo' ramdisks: 56*0Sstevel@tonic-gate * 57*0Sstevel@tonic-gate * /dev/ramdisk/<diskname> -> /devices/pseudo/ramdisk@0:<diskname> 58*0Sstevel@tonic-gate * /dev/rramdisk/<diskname> -> /devices/pseudo/ramdisk@0:<diskname>,raw 59*0Sstevel@tonic-gate * 60*0Sstevel@tonic-gate * For OBP-created ramdisks: 61*0Sstevel@tonic-gate * 62*0Sstevel@tonic-gate * /dev/ramdisk/<diskname> -> /devices/ramdisk-<diskname>:a 63*0Sstevel@tonic-gate * /dev/ramdisk/<diskname> -> /devices/ramdisk-<diskname>:a,raw 64*0Sstevel@tonic-gate * 65*0Sstevel@tonic-gate * This allows the transition from the standalone to the kernel to proceed 66*0Sstevel@tonic-gate * when booting from a ramdisk, and for the installation to correctly identify 67*0Sstevel@tonic-gate * the root device. 68*0Sstevel@tonic-gate */ 69*0Sstevel@tonic-gate 70*0Sstevel@tonic-gate #include <sys/types.h> 71*0Sstevel@tonic-gate #include <sys/param.h> 72*0Sstevel@tonic-gate #include <sys/sysmacros.h> 73*0Sstevel@tonic-gate #include <sys/errno.h> 74*0Sstevel@tonic-gate #include <sys/uio.h> 75*0Sstevel@tonic-gate #include <sys/buf.h> 76*0Sstevel@tonic-gate #include <sys/modctl.h> 77*0Sstevel@tonic-gate #include <sys/open.h> 78*0Sstevel@tonic-gate #include <sys/kmem.h> 79*0Sstevel@tonic-gate #include <sys/poll.h> 80*0Sstevel@tonic-gate #include <sys/conf.h> 81*0Sstevel@tonic-gate #include <sys/cmn_err.h> 82*0Sstevel@tonic-gate #include <sys/stat.h> 83*0Sstevel@tonic-gate #include <sys/file.h> 84*0Sstevel@tonic-gate #include <sys/vol.h> 85*0Sstevel@tonic-gate #include <sys/ddi.h> 86*0Sstevel@tonic-gate #include <sys/sunddi.h> 87*0Sstevel@tonic-gate #include <sys/ramdisk.h> 88*0Sstevel@tonic-gate #include <vm/seg_kmem.h> 89*0Sstevel@tonic-gate 90*0Sstevel@tonic-gate /* 91*0Sstevel@tonic-gate * An opaque handle where information about our set of ramdisk devices lives. 92*0Sstevel@tonic-gate */ 93*0Sstevel@tonic-gate static void *rd_statep; 94*0Sstevel@tonic-gate 95*0Sstevel@tonic-gate /* 96*0Sstevel@tonic-gate * Pointer to devinfo for the 'pseudo' ramdisks. Real OBP-created ramdisks 97*0Sstevel@tonic-gate * get their own individual devinfo. 98*0Sstevel@tonic-gate */ 99*0Sstevel@tonic-gate static dev_info_t *rd_dip = NULL; 100*0Sstevel@tonic-gate 101*0Sstevel@tonic-gate /* 102*0Sstevel@tonic-gate * Global state lock. 103*0Sstevel@tonic-gate */ 104*0Sstevel@tonic-gate static kmutex_t rd_lock; 105*0Sstevel@tonic-gate 106*0Sstevel@tonic-gate /* 107*0Sstevel@tonic-gate * Maximum number of ramdisks supported by this driver. 108*0Sstevel@tonic-gate */ 109*0Sstevel@tonic-gate static uint32_t rd_max_disks = RD_DFLT_DISKS; 110*0Sstevel@tonic-gate 111*0Sstevel@tonic-gate /* 112*0Sstevel@tonic-gate * Percentage of physical memory which can be assigned to pseudo ramdisks, 113*0Sstevel@tonic-gate * what that equates to in pages, and how many pages are currently assigned. 114*0Sstevel@tonic-gate */ 115*0Sstevel@tonic-gate static uint_t rd_percent_physmem = RD_DEFAULT_PERCENT_PHYSMEM; 116*0Sstevel@tonic-gate static pgcnt_t rd_max_physmem; 117*0Sstevel@tonic-gate static pgcnt_t rd_tot_physmem; 118*0Sstevel@tonic-gate 119*0Sstevel@tonic-gate static uint_t rd_maxphys = RD_DEFAULT_MAXPHYS; 120*0Sstevel@tonic-gate 121*0Sstevel@tonic-gate /* 122*0Sstevel@tonic-gate * Is the driver busy, i.e. are there any pseudo ramdisk devices in existence? 123*0Sstevel@tonic-gate */ 124*0Sstevel@tonic-gate static int 125*0Sstevel@tonic-gate rd_is_busy(void) 126*0Sstevel@tonic-gate { 127*0Sstevel@tonic-gate minor_t minor; 128*0Sstevel@tonic-gate rd_devstate_t *rsp; 129*0Sstevel@tonic-gate 130*0Sstevel@tonic-gate ASSERT(mutex_owned(&rd_lock)); 131*0Sstevel@tonic-gate for (minor = 1; minor <= rd_max_disks; ++minor) { 132*0Sstevel@tonic-gate if ((rsp = ddi_get_soft_state(rd_statep, minor)) != NULL && 133*0Sstevel@tonic-gate rsp->rd_dip == rd_dip) { 134*0Sstevel@tonic-gate return (EBUSY); 135*0Sstevel@tonic-gate } 136*0Sstevel@tonic-gate } 137*0Sstevel@tonic-gate return (0); 138*0Sstevel@tonic-gate } 139*0Sstevel@tonic-gate 140*0Sstevel@tonic-gate /* 141*0Sstevel@tonic-gate * Find the first free minor number; returns zero if there isn't one. 142*0Sstevel@tonic-gate */ 143*0Sstevel@tonic-gate static minor_t 144*0Sstevel@tonic-gate rd_find_free_minor(void) 145*0Sstevel@tonic-gate { 146*0Sstevel@tonic-gate minor_t minor; 147*0Sstevel@tonic-gate 148*0Sstevel@tonic-gate ASSERT(mutex_owned(&rd_lock)); 149*0Sstevel@tonic-gate for (minor = 1; minor <= rd_max_disks; ++minor) { 150*0Sstevel@tonic-gate if (ddi_get_soft_state(rd_statep, minor) == NULL) { 151*0Sstevel@tonic-gate return (minor); 152*0Sstevel@tonic-gate } 153*0Sstevel@tonic-gate } 154*0Sstevel@tonic-gate return (0); 155*0Sstevel@tonic-gate } 156*0Sstevel@tonic-gate 157*0Sstevel@tonic-gate /* 158*0Sstevel@tonic-gate * Locate the rd_devstate for the named ramdisk; returns NULL if not found. 159*0Sstevel@tonic-gate * Each ramdisk is identified uniquely by name, i.e. an OBP-created ramdisk 160*0Sstevel@tonic-gate * cannot have the same name as a pseudo ramdisk. 161*0Sstevel@tonic-gate */ 162*0Sstevel@tonic-gate static rd_devstate_t * 163*0Sstevel@tonic-gate rd_find_named_disk(char *name) 164*0Sstevel@tonic-gate { 165*0Sstevel@tonic-gate minor_t minor; 166*0Sstevel@tonic-gate rd_devstate_t *rsp; 167*0Sstevel@tonic-gate 168*0Sstevel@tonic-gate ASSERT(mutex_owned(&rd_lock)); 169*0Sstevel@tonic-gate for (minor = 1; minor <= rd_max_disks; ++minor) { 170*0Sstevel@tonic-gate if ((rsp = ddi_get_soft_state(rd_statep, minor)) != NULL && 171*0Sstevel@tonic-gate strcmp(rsp->rd_name, name) == 0) { 172*0Sstevel@tonic-gate return (rsp); 173*0Sstevel@tonic-gate } 174*0Sstevel@tonic-gate } 175*0Sstevel@tonic-gate return (NULL); 176*0Sstevel@tonic-gate } 177*0Sstevel@tonic-gate 178*0Sstevel@tonic-gate /* 179*0Sstevel@tonic-gate * Locate the rd_devstate for the real OBP-created ramdisk whose devinfo 180*0Sstevel@tonic-gate * is referenced by 'dip'; returns NULL if not found (shouldn't happen). 181*0Sstevel@tonic-gate */ 182*0Sstevel@tonic-gate static rd_devstate_t * 183*0Sstevel@tonic-gate rd_find_dip_state(dev_info_t *dip) 184*0Sstevel@tonic-gate { 185*0Sstevel@tonic-gate minor_t minor; 186*0Sstevel@tonic-gate rd_devstate_t *rsp; 187*0Sstevel@tonic-gate 188*0Sstevel@tonic-gate ASSERT(mutex_owned(&rd_lock)); 189*0Sstevel@tonic-gate for (minor = 1; minor <= rd_max_disks; ++minor) { 190*0Sstevel@tonic-gate if ((rsp = ddi_get_soft_state(rd_statep, minor)) != NULL && 191*0Sstevel@tonic-gate rsp->rd_dip == dip) { 192*0Sstevel@tonic-gate return (rsp); 193*0Sstevel@tonic-gate } 194*0Sstevel@tonic-gate } 195*0Sstevel@tonic-gate return (NULL); 196*0Sstevel@tonic-gate } 197*0Sstevel@tonic-gate 198*0Sstevel@tonic-gate /* 199*0Sstevel@tonic-gate * Is the ramdisk open? 200*0Sstevel@tonic-gate */ 201*0Sstevel@tonic-gate static int 202*0Sstevel@tonic-gate rd_is_open(rd_devstate_t *rsp) 203*0Sstevel@tonic-gate { 204*0Sstevel@tonic-gate ASSERT(mutex_owned(&rd_lock)); 205*0Sstevel@tonic-gate return (rsp->rd_chr_open || rsp->rd_blk_open || rsp->rd_lyr_open_cnt); 206*0Sstevel@tonic-gate } 207*0Sstevel@tonic-gate 208*0Sstevel@tonic-gate /* 209*0Sstevel@tonic-gate * Mark the ramdisk open. 210*0Sstevel@tonic-gate */ 211*0Sstevel@tonic-gate static int 212*0Sstevel@tonic-gate rd_opened(rd_devstate_t *rsp, int otyp) 213*0Sstevel@tonic-gate { 214*0Sstevel@tonic-gate ASSERT(mutex_owned(&rd_lock)); 215*0Sstevel@tonic-gate switch (otyp) { 216*0Sstevel@tonic-gate case OTYP_CHR: 217*0Sstevel@tonic-gate rsp->rd_chr_open = 1; 218*0Sstevel@tonic-gate break; 219*0Sstevel@tonic-gate case OTYP_BLK: 220*0Sstevel@tonic-gate rsp->rd_blk_open = 1; 221*0Sstevel@tonic-gate break; 222*0Sstevel@tonic-gate case OTYP_LYR: 223*0Sstevel@tonic-gate rsp->rd_lyr_open_cnt++; 224*0Sstevel@tonic-gate break; 225*0Sstevel@tonic-gate default: 226*0Sstevel@tonic-gate return (-1); 227*0Sstevel@tonic-gate } 228*0Sstevel@tonic-gate return (0); 229*0Sstevel@tonic-gate } 230*0Sstevel@tonic-gate 231*0Sstevel@tonic-gate /* 232*0Sstevel@tonic-gate * Mark the ramdisk closed. 233*0Sstevel@tonic-gate */ 234*0Sstevel@tonic-gate static void 235*0Sstevel@tonic-gate rd_closed(rd_devstate_t *rsp, int otyp) 236*0Sstevel@tonic-gate { 237*0Sstevel@tonic-gate ASSERT(mutex_owned(&rd_lock)); 238*0Sstevel@tonic-gate switch (otyp) { 239*0Sstevel@tonic-gate case OTYP_CHR: 240*0Sstevel@tonic-gate rsp->rd_chr_open = 0; 241*0Sstevel@tonic-gate break; 242*0Sstevel@tonic-gate case OTYP_BLK: 243*0Sstevel@tonic-gate rsp->rd_blk_open = 0; 244*0Sstevel@tonic-gate break; 245*0Sstevel@tonic-gate case OTYP_LYR: 246*0Sstevel@tonic-gate rsp->rd_lyr_open_cnt--; 247*0Sstevel@tonic-gate break; 248*0Sstevel@tonic-gate default: 249*0Sstevel@tonic-gate break; 250*0Sstevel@tonic-gate } 251*0Sstevel@tonic-gate } 252*0Sstevel@tonic-gate 253*0Sstevel@tonic-gate static void 254*0Sstevel@tonic-gate rd_init_tuneables(void) 255*0Sstevel@tonic-gate { 256*0Sstevel@tonic-gate char *prop, *p; 257*0Sstevel@tonic-gate 258*0Sstevel@tonic-gate /* 259*0Sstevel@tonic-gate * Ensure sanity of 'rd_max_disks', which may be tuned in ramdisk.conf. 260*0Sstevel@tonic-gate */ 261*0Sstevel@tonic-gate if (ddi_prop_lookup_string(DDI_DEV_T_ANY, rd_dip, 0, 262*0Sstevel@tonic-gate "max_disks", &prop) == DDI_PROP_SUCCESS) { 263*0Sstevel@tonic-gate p = prop; 264*0Sstevel@tonic-gate rd_max_disks = (uint32_t)stoi(&p); 265*0Sstevel@tonic-gate ddi_prop_free(prop); 266*0Sstevel@tonic-gate } 267*0Sstevel@tonic-gate if (rd_max_disks >= RD_MAX_DISKS) { 268*0Sstevel@tonic-gate cmn_err(CE_WARN, "ramdisk: rd_max_disks (%u) too big;" 269*0Sstevel@tonic-gate " using default (%u).", rd_max_disks, RD_MAX_DISKS - 1); 270*0Sstevel@tonic-gate 271*0Sstevel@tonic-gate rd_max_disks = RD_MAX_DISKS - 1; 272*0Sstevel@tonic-gate } 273*0Sstevel@tonic-gate 274*0Sstevel@tonic-gate /* 275*0Sstevel@tonic-gate * Ensure sanity of 'rd_percent_physmem', which may be tuned 276*0Sstevel@tonic-gate * in ramdisk.conf. 277*0Sstevel@tonic-gate */ 278*0Sstevel@tonic-gate if (ddi_prop_lookup_string(DDI_DEV_T_ANY, rd_dip, 0, 279*0Sstevel@tonic-gate "percent_physmem", &prop) == DDI_PROP_SUCCESS) { 280*0Sstevel@tonic-gate p = prop; 281*0Sstevel@tonic-gate rd_percent_physmem = (uint_t)stoi(&p); 282*0Sstevel@tonic-gate ddi_prop_free(prop); 283*0Sstevel@tonic-gate } 284*0Sstevel@tonic-gate if (rd_percent_physmem >= 100) { 285*0Sstevel@tonic-gate cmn_err(CE_WARN, "ramdisk: rd_percent_physmem (%u) >= 100;" 286*0Sstevel@tonic-gate " using default (%u%%).", rd_percent_physmem, 287*0Sstevel@tonic-gate RD_DEFAULT_PERCENT_PHYSMEM); 288*0Sstevel@tonic-gate 289*0Sstevel@tonic-gate rd_percent_physmem = RD_DEFAULT_PERCENT_PHYSMEM; 290*0Sstevel@tonic-gate } 291*0Sstevel@tonic-gate 292*0Sstevel@tonic-gate /* 293*0Sstevel@tonic-gate * Since availrmem is in pages (and is a long), this won't overflow. 294*0Sstevel@tonic-gate */ 295*0Sstevel@tonic-gate rd_max_physmem = (availrmem * rd_percent_physmem) / 100; 296*0Sstevel@tonic-gate } 297*0Sstevel@tonic-gate 298*0Sstevel@tonic-gate /* 299*0Sstevel@tonic-gate * Allocate enough physical pages to hold `size' bytes. Returns an 300*0Sstevel@tonic-gate * array of page_t * pointers that can later be mapped in or out via 301*0Sstevel@tonic-gate * rd_{un}map_window() but is otherwise opaque, or NULL on failure. 302*0Sstevel@tonic-gate * 303*0Sstevel@tonic-gate * This code stolen from the NCA driver. 304*0Sstevel@tonic-gate */ 305*0Sstevel@tonic-gate page_t ** 306*0Sstevel@tonic-gate rd_phys_alloc(pgcnt_t npages) 307*0Sstevel@tonic-gate { 308*0Sstevel@tonic-gate page_t *pp, **ppa; 309*0Sstevel@tonic-gate pgcnt_t i; 310*0Sstevel@tonic-gate size_t ppalen = npages * sizeof (struct page_t *); 311*0Sstevel@tonic-gate struct seg kseg; 312*0Sstevel@tonic-gate char *addr; /* For the purposes of coloring */ 313*0Sstevel@tonic-gate 314*0Sstevel@tonic-gate if (rd_tot_physmem + npages > rd_max_physmem) { 315*0Sstevel@tonic-gate return (NULL); 316*0Sstevel@tonic-gate } 317*0Sstevel@tonic-gate ppa = kmem_zalloc(ppalen, KM_SLEEP); 318*0Sstevel@tonic-gate (void) page_resv(npages, KM_SLEEP); 319*0Sstevel@tonic-gate 320*0Sstevel@tonic-gate for (i = 0, addr = NULL; i < npages; ++i, addr += PAGESIZE) { 321*0Sstevel@tonic-gate if (!page_create_wait(1, KM_SLEEP)) { 322*0Sstevel@tonic-gate goto out; 323*0Sstevel@tonic-gate } 324*0Sstevel@tonic-gate 325*0Sstevel@tonic-gate kseg.s_as = &kas; 326*0Sstevel@tonic-gate 327*0Sstevel@tonic-gate if ((pp = page_get_freelist(&kvp, 0, &kseg, addr, PAGESIZE, 328*0Sstevel@tonic-gate KM_SLEEP, NULL)) == NULL) { 329*0Sstevel@tonic-gate if ((pp = page_get_cachelist(&kvp, 0, &kseg, addr, 330*0Sstevel@tonic-gate KM_SLEEP, NULL)) == NULL) { 331*0Sstevel@tonic-gate goto out; 332*0Sstevel@tonic-gate } 333*0Sstevel@tonic-gate if (PP_ISAGED(pp) == 0) { 334*0Sstevel@tonic-gate page_hashout(pp, NULL); 335*0Sstevel@tonic-gate } 336*0Sstevel@tonic-gate } 337*0Sstevel@tonic-gate 338*0Sstevel@tonic-gate PP_CLRFREE(pp); 339*0Sstevel@tonic-gate PP_CLRAGED(pp); 340*0Sstevel@tonic-gate ppa[i] = pp; 341*0Sstevel@tonic-gate page_downgrade(pp); 342*0Sstevel@tonic-gate } 343*0Sstevel@tonic-gate rd_tot_physmem += npages; 344*0Sstevel@tonic-gate 345*0Sstevel@tonic-gate return (ppa); 346*0Sstevel@tonic-gate out: 347*0Sstevel@tonic-gate for (i = 0; ppa[i] != NULL && i < npages; ++i) { 348*0Sstevel@tonic-gate page_free(ppa[i], 0); 349*0Sstevel@tonic-gate } 350*0Sstevel@tonic-gate 351*0Sstevel@tonic-gate page_create_putback(i); 352*0Sstevel@tonic-gate kmem_free(ppa, ppalen); 353*0Sstevel@tonic-gate 354*0Sstevel@tonic-gate page_unresv(npages); 355*0Sstevel@tonic-gate 356*0Sstevel@tonic-gate return (NULL); 357*0Sstevel@tonic-gate } 358*0Sstevel@tonic-gate 359*0Sstevel@tonic-gate /* 360*0Sstevel@tonic-gate * Free physical pages previously allocated via rd_phys_alloc(); note that 361*0Sstevel@tonic-gate * this function may block as it has to wait until it can exclusively lock 362*0Sstevel@tonic-gate * all the pages first. 363*0Sstevel@tonic-gate */ 364*0Sstevel@tonic-gate static void 365*0Sstevel@tonic-gate rd_phys_free(page_t **ppa, pgcnt_t npages) 366*0Sstevel@tonic-gate { 367*0Sstevel@tonic-gate pgcnt_t i; 368*0Sstevel@tonic-gate size_t ppalen = npages * sizeof (struct page_t *); 369*0Sstevel@tonic-gate 370*0Sstevel@tonic-gate for (i = 0; i < npages; ++i) { 371*0Sstevel@tonic-gate if (! page_tryupgrade(ppa[i])) { 372*0Sstevel@tonic-gate page_unlock(ppa[i]); 373*0Sstevel@tonic-gate while (! page_lock(ppa[i], SE_EXCL, NULL, P_RECLAIM)) 374*0Sstevel@tonic-gate ; 375*0Sstevel@tonic-gate } 376*0Sstevel@tonic-gate page_free(ppa[i], 0); 377*0Sstevel@tonic-gate } 378*0Sstevel@tonic-gate 379*0Sstevel@tonic-gate kmem_free(ppa, ppalen); 380*0Sstevel@tonic-gate 381*0Sstevel@tonic-gate page_unresv(npages); 382*0Sstevel@tonic-gate rd_tot_physmem -= npages; 383*0Sstevel@tonic-gate } 384*0Sstevel@tonic-gate 385*0Sstevel@tonic-gate /* 386*0Sstevel@tonic-gate * Remove a window mapping (if present). 387*0Sstevel@tonic-gate */ 388*0Sstevel@tonic-gate static void 389*0Sstevel@tonic-gate rd_unmap_window(rd_devstate_t *rsp) 390*0Sstevel@tonic-gate { 391*0Sstevel@tonic-gate if (rsp->rd_window_base != RD_WINDOW_NOT_MAPPED) { 392*0Sstevel@tonic-gate hat_unload(kas.a_hat, rsp->rd_window_virt, rsp->rd_window_size, 393*0Sstevel@tonic-gate HAT_UNLOAD_UNLOCK); 394*0Sstevel@tonic-gate } 395*0Sstevel@tonic-gate } 396*0Sstevel@tonic-gate 397*0Sstevel@tonic-gate /* 398*0Sstevel@tonic-gate * Map a portion of the ramdisk into the virtual window. 399*0Sstevel@tonic-gate */ 400*0Sstevel@tonic-gate static void 401*0Sstevel@tonic-gate rd_map_window(rd_devstate_t *rsp, off_t offset) 402*0Sstevel@tonic-gate { 403*0Sstevel@tonic-gate pgcnt_t offpgs = btop(offset); 404*0Sstevel@tonic-gate 405*0Sstevel@tonic-gate if (rsp->rd_window_base != RD_WINDOW_NOT_MAPPED) { 406*0Sstevel@tonic-gate /* 407*0Sstevel@tonic-gate * Already mapped; is offset within our window? 408*0Sstevel@tonic-gate */ 409*0Sstevel@tonic-gate if (offset >= rsp->rd_window_base && 410*0Sstevel@tonic-gate offset < rsp->rd_window_base + rsp->rd_window_size) { 411*0Sstevel@tonic-gate return; 412*0Sstevel@tonic-gate } 413*0Sstevel@tonic-gate 414*0Sstevel@tonic-gate /* 415*0Sstevel@tonic-gate * No, we need to re-map; toss the old mapping. 416*0Sstevel@tonic-gate */ 417*0Sstevel@tonic-gate rd_unmap_window(rsp); 418*0Sstevel@tonic-gate } 419*0Sstevel@tonic-gate rsp->rd_window_base = ptob(offpgs); 420*0Sstevel@tonic-gate 421*0Sstevel@tonic-gate /* 422*0Sstevel@tonic-gate * Different algorithms depending on whether this is a real 423*0Sstevel@tonic-gate * OBP-created ramdisk, or a pseudo ramdisk. 424*0Sstevel@tonic-gate */ 425*0Sstevel@tonic-gate if (rsp->rd_dip == rd_dip) { 426*0Sstevel@tonic-gate pgcnt_t pi, lastpi; 427*0Sstevel@tonic-gate caddr_t vaddr; 428*0Sstevel@tonic-gate 429*0Sstevel@tonic-gate /* 430*0Sstevel@tonic-gate * Find the range of pages which should be mapped. 431*0Sstevel@tonic-gate */ 432*0Sstevel@tonic-gate pi = offpgs; 433*0Sstevel@tonic-gate lastpi = pi + btopr(rsp->rd_window_size); 434*0Sstevel@tonic-gate if (lastpi > rsp->rd_npages) { 435*0Sstevel@tonic-gate lastpi = rsp->rd_npages; 436*0Sstevel@tonic-gate } 437*0Sstevel@tonic-gate 438*0Sstevel@tonic-gate /* 439*0Sstevel@tonic-gate * Load the mapping. 440*0Sstevel@tonic-gate */ 441*0Sstevel@tonic-gate vaddr = rsp->rd_window_virt; 442*0Sstevel@tonic-gate for (; pi < lastpi; ++pi) { 443*0Sstevel@tonic-gate hat_memload(kas.a_hat, vaddr, rsp->rd_ppa[pi], 444*0Sstevel@tonic-gate (PROT_READ | PROT_WRITE) | HAT_NOSYNC, 445*0Sstevel@tonic-gate HAT_LOAD_LOCK); 446*0Sstevel@tonic-gate vaddr += ptob(1); 447*0Sstevel@tonic-gate } 448*0Sstevel@tonic-gate } else { 449*0Sstevel@tonic-gate uint_t i; 450*0Sstevel@tonic-gate pfn_t pfn; 451*0Sstevel@tonic-gate 452*0Sstevel@tonic-gate /* 453*0Sstevel@tonic-gate * Real OBP-created ramdisk: locate the physical range which 454*0Sstevel@tonic-gate * contains this offset. 455*0Sstevel@tonic-gate */ 456*0Sstevel@tonic-gate for (i = 0; i < rsp->rd_nexisting; ++i) { 457*0Sstevel@tonic-gate if (offset < rsp->rd_existing[i].size) { 458*0Sstevel@tonic-gate break; 459*0Sstevel@tonic-gate } 460*0Sstevel@tonic-gate offset -= rsp->rd_existing[i].size; 461*0Sstevel@tonic-gate } 462*0Sstevel@tonic-gate ASSERT(i < rsp->rd_nexisting); 463*0Sstevel@tonic-gate 464*0Sstevel@tonic-gate /* 465*0Sstevel@tonic-gate * Load the mapping. 466*0Sstevel@tonic-gate */ 467*0Sstevel@tonic-gate pfn = btop(rsp->rd_existing[i].phys + offset); 468*0Sstevel@tonic-gate hat_devload(kas.a_hat, rsp->rd_window_virt, rsp->rd_window_size, 469*0Sstevel@tonic-gate pfn, (PROT_READ | PROT_WRITE), 470*0Sstevel@tonic-gate HAT_LOAD_NOCONSIST | HAT_LOAD_LOCK); 471*0Sstevel@tonic-gate } 472*0Sstevel@tonic-gate } 473*0Sstevel@tonic-gate 474*0Sstevel@tonic-gate /* 475*0Sstevel@tonic-gate * Fakes up a disk geometry, and one big partition, based on the size 476*0Sstevel@tonic-gate * of the file. This is needed because we allow newfs'ing the device, 477*0Sstevel@tonic-gate * and newfs will do several disk ioctls to figure out the geometry and 478*0Sstevel@tonic-gate * partition information. It uses that information to determine the parameters 479*0Sstevel@tonic-gate * to pass to mkfs. Geometry is pretty much irrelevent these days, but we 480*0Sstevel@tonic-gate * have to support it. 481*0Sstevel@tonic-gate * 482*0Sstevel@tonic-gate * Stolen from lofi.c - should maybe split out common code sometime. 483*0Sstevel@tonic-gate */ 484*0Sstevel@tonic-gate static void 485*0Sstevel@tonic-gate rd_fake_disk_geometry(rd_devstate_t *rsp) 486*0Sstevel@tonic-gate { 487*0Sstevel@tonic-gate /* dk_geom - see dkio(7I) */ 488*0Sstevel@tonic-gate /* 489*0Sstevel@tonic-gate * dkg_ncyl _could_ be set to one here (one big cylinder with gobs 490*0Sstevel@tonic-gate * of sectors), but that breaks programs like fdisk which want to 491*0Sstevel@tonic-gate * partition a disk by cylinder. With one cylinder, you can't create 492*0Sstevel@tonic-gate * an fdisk partition and put pcfs on it for testing (hard to pick 493*0Sstevel@tonic-gate * a number between one and one). 494*0Sstevel@tonic-gate * 495*0Sstevel@tonic-gate * The cheezy floppy test is an attempt to not have too few cylinders 496*0Sstevel@tonic-gate * for a small file, or so many on a big file that you waste space 497*0Sstevel@tonic-gate * for backup superblocks or cylinder group structures. 498*0Sstevel@tonic-gate */ 499*0Sstevel@tonic-gate if (rsp->rd_size < (2 * 1024 * 1024)) /* floppy? */ 500*0Sstevel@tonic-gate rsp->rd_dkg.dkg_ncyl = rsp->rd_size / (100 * 1024); 501*0Sstevel@tonic-gate else 502*0Sstevel@tonic-gate rsp->rd_dkg.dkg_ncyl = rsp->rd_size / (300 * 1024); 503*0Sstevel@tonic-gate /* in case file file is < 100k */ 504*0Sstevel@tonic-gate if (rsp->rd_dkg.dkg_ncyl == 0) 505*0Sstevel@tonic-gate rsp->rd_dkg.dkg_ncyl = 1; 506*0Sstevel@tonic-gate rsp->rd_dkg.dkg_acyl = 0; 507*0Sstevel@tonic-gate rsp->rd_dkg.dkg_bcyl = 0; 508*0Sstevel@tonic-gate rsp->rd_dkg.dkg_nhead = 1; 509*0Sstevel@tonic-gate rsp->rd_dkg.dkg_obs1 = 0; 510*0Sstevel@tonic-gate rsp->rd_dkg.dkg_intrlv = 0; 511*0Sstevel@tonic-gate rsp->rd_dkg.dkg_obs2 = 0; 512*0Sstevel@tonic-gate rsp->rd_dkg.dkg_obs3 = 0; 513*0Sstevel@tonic-gate rsp->rd_dkg.dkg_apc = 0; 514*0Sstevel@tonic-gate rsp->rd_dkg.dkg_rpm = 7200; 515*0Sstevel@tonic-gate rsp->rd_dkg.dkg_pcyl = rsp->rd_dkg.dkg_ncyl + rsp->rd_dkg.dkg_acyl; 516*0Sstevel@tonic-gate rsp->rd_dkg.dkg_nsect = rsp->rd_size / 517*0Sstevel@tonic-gate (DEV_BSIZE * rsp->rd_dkg.dkg_ncyl); 518*0Sstevel@tonic-gate rsp->rd_dkg.dkg_write_reinstruct = 0; 519*0Sstevel@tonic-gate rsp->rd_dkg.dkg_read_reinstruct = 0; 520*0Sstevel@tonic-gate 521*0Sstevel@tonic-gate /* vtoc - see dkio(7I) */ 522*0Sstevel@tonic-gate bzero(&rsp->rd_vtoc, sizeof (struct vtoc)); 523*0Sstevel@tonic-gate rsp->rd_vtoc.v_sanity = VTOC_SANE; 524*0Sstevel@tonic-gate rsp->rd_vtoc.v_version = V_VERSION; 525*0Sstevel@tonic-gate bcopy(RD_DRIVER_NAME, rsp->rd_vtoc.v_volume, 7); 526*0Sstevel@tonic-gate rsp->rd_vtoc.v_sectorsz = DEV_BSIZE; 527*0Sstevel@tonic-gate rsp->rd_vtoc.v_nparts = 1; 528*0Sstevel@tonic-gate rsp->rd_vtoc.v_part[0].p_tag = V_UNASSIGNED; 529*0Sstevel@tonic-gate rsp->rd_vtoc.v_part[0].p_flag = V_UNMNT; 530*0Sstevel@tonic-gate rsp->rd_vtoc.v_part[0].p_start = (daddr_t)0; 531*0Sstevel@tonic-gate /* 532*0Sstevel@tonic-gate * The partition size cannot just be the number of sectors, because 533*0Sstevel@tonic-gate * that might not end on a cylinder boundary. And if that's the case, 534*0Sstevel@tonic-gate * newfs/mkfs will print a scary warning. So just figure the size 535*0Sstevel@tonic-gate * based on the number of cylinders and sectors/cylinder. 536*0Sstevel@tonic-gate */ 537*0Sstevel@tonic-gate rsp->rd_vtoc.v_part[0].p_size = rsp->rd_dkg.dkg_pcyl * 538*0Sstevel@tonic-gate rsp->rd_dkg.dkg_nsect * rsp->rd_dkg.dkg_nhead; 539*0Sstevel@tonic-gate 540*0Sstevel@tonic-gate /* dk_cinfo - see dkio(7I) */ 541*0Sstevel@tonic-gate bzero(&rsp->rd_ci, sizeof (struct dk_cinfo)); 542*0Sstevel@tonic-gate (void) strcpy(rsp->rd_ci.dki_cname, RD_DRIVER_NAME); 543*0Sstevel@tonic-gate rsp->rd_ci.dki_ctype = DKC_MD; 544*0Sstevel@tonic-gate rsp->rd_ci.dki_flags = 0; 545*0Sstevel@tonic-gate rsp->rd_ci.dki_cnum = 0; 546*0Sstevel@tonic-gate rsp->rd_ci.dki_addr = 0; 547*0Sstevel@tonic-gate rsp->rd_ci.dki_space = 0; 548*0Sstevel@tonic-gate rsp->rd_ci.dki_prio = 0; 549*0Sstevel@tonic-gate rsp->rd_ci.dki_vec = 0; 550*0Sstevel@tonic-gate (void) strcpy(rsp->rd_ci.dki_dname, RD_DRIVER_NAME); 551*0Sstevel@tonic-gate rsp->rd_ci.dki_unit = 0; 552*0Sstevel@tonic-gate rsp->rd_ci.dki_slave = 0; 553*0Sstevel@tonic-gate rsp->rd_ci.dki_partition = 0; 554*0Sstevel@tonic-gate /* 555*0Sstevel@tonic-gate * newfs uses this to set maxcontig. Must not be < 16, or it 556*0Sstevel@tonic-gate * will be 0 when newfs multiplies it by DEV_BSIZE and divides 557*0Sstevel@tonic-gate * it by the block size. Then tunefs doesn't work because 558*0Sstevel@tonic-gate * maxcontig is 0. 559*0Sstevel@tonic-gate */ 560*0Sstevel@tonic-gate rsp->rd_ci.dki_maxtransfer = 16; 561*0Sstevel@tonic-gate } 562*0Sstevel@tonic-gate 563*0Sstevel@tonic-gate /* 564*0Sstevel@tonic-gate * Deallocate resources (virtual and physical, device nodes, structures) 565*0Sstevel@tonic-gate * from a ramdisk. 566*0Sstevel@tonic-gate */ 567*0Sstevel@tonic-gate static void 568*0Sstevel@tonic-gate rd_dealloc_resources(rd_devstate_t *rsp) 569*0Sstevel@tonic-gate { 570*0Sstevel@tonic-gate dev_info_t *dip = rsp->rd_dip; 571*0Sstevel@tonic-gate char namebuf[RD_NAME_LEN + 5]; 572*0Sstevel@tonic-gate dev_t fulldev; 573*0Sstevel@tonic-gate 574*0Sstevel@tonic-gate if (rsp->rd_window_virt != NULL) { 575*0Sstevel@tonic-gate if (rsp->rd_window_base != RD_WINDOW_NOT_MAPPED) { 576*0Sstevel@tonic-gate rd_unmap_window(rsp); 577*0Sstevel@tonic-gate } 578*0Sstevel@tonic-gate vmem_free(heap_arena, rsp->rd_window_virt, rsp->rd_window_size); 579*0Sstevel@tonic-gate } 580*0Sstevel@tonic-gate mutex_destroy(&rsp->rd_device_lock); 581*0Sstevel@tonic-gate 582*0Sstevel@tonic-gate if (rsp->rd_existing) { 583*0Sstevel@tonic-gate ddi_prop_free(rsp->rd_existing); 584*0Sstevel@tonic-gate } 585*0Sstevel@tonic-gate if (rsp->rd_ppa != NULL) { 586*0Sstevel@tonic-gate rd_phys_free(rsp->rd_ppa, rsp->rd_npages); 587*0Sstevel@tonic-gate } 588*0Sstevel@tonic-gate 589*0Sstevel@tonic-gate /* 590*0Sstevel@tonic-gate * Remove the block and raw device nodes. 591*0Sstevel@tonic-gate */ 592*0Sstevel@tonic-gate if (dip == rd_dip) { 593*0Sstevel@tonic-gate (void) snprintf(namebuf, sizeof (namebuf), "%s", 594*0Sstevel@tonic-gate rsp->rd_name); 595*0Sstevel@tonic-gate ddi_remove_minor_node(dip, namebuf); 596*0Sstevel@tonic-gate (void) snprintf(namebuf, sizeof (namebuf), "%s,raw", 597*0Sstevel@tonic-gate rsp->rd_name); 598*0Sstevel@tonic-gate ddi_remove_minor_node(dip, namebuf); 599*0Sstevel@tonic-gate } else { 600*0Sstevel@tonic-gate ddi_remove_minor_node(dip, "a"); 601*0Sstevel@tonic-gate ddi_remove_minor_node(dip, "a,raw"); 602*0Sstevel@tonic-gate } 603*0Sstevel@tonic-gate 604*0Sstevel@tonic-gate /* 605*0Sstevel@tonic-gate * Remove the "Size" and "Nblocks" properties. 606*0Sstevel@tonic-gate */ 607*0Sstevel@tonic-gate fulldev = makedevice(ddi_driver_major(dip), rsp->rd_minor); 608*0Sstevel@tonic-gate (void) ddi_prop_remove(fulldev, dip, SIZE_PROP_NAME); 609*0Sstevel@tonic-gate (void) ddi_prop_remove(fulldev, dip, NBLOCKS_PROP_NAME); 610*0Sstevel@tonic-gate 611*0Sstevel@tonic-gate if (rsp->rd_kstat) { 612*0Sstevel@tonic-gate kstat_delete(rsp->rd_kstat); 613*0Sstevel@tonic-gate mutex_destroy(&rsp->rd_kstat_lock); 614*0Sstevel@tonic-gate } 615*0Sstevel@tonic-gate 616*0Sstevel@tonic-gate ddi_soft_state_free(rd_statep, rsp->rd_minor); 617*0Sstevel@tonic-gate } 618*0Sstevel@tonic-gate 619*0Sstevel@tonic-gate /* 620*0Sstevel@tonic-gate * Allocate resources (virtual and physical, device nodes, structures) 621*0Sstevel@tonic-gate * to a ramdisk. 622*0Sstevel@tonic-gate */ 623*0Sstevel@tonic-gate static rd_devstate_t * 624*0Sstevel@tonic-gate rd_alloc_resources(char *name, size_t size, dev_info_t *dip) 625*0Sstevel@tonic-gate { 626*0Sstevel@tonic-gate minor_t minor; 627*0Sstevel@tonic-gate rd_devstate_t *rsp; 628*0Sstevel@tonic-gate char namebuf[RD_NAME_LEN + 5]; 629*0Sstevel@tonic-gate dev_t fulldev; 630*0Sstevel@tonic-gate int64_t Nblocks_prop_val; 631*0Sstevel@tonic-gate int64_t Size_prop_val; 632*0Sstevel@tonic-gate 633*0Sstevel@tonic-gate minor = rd_find_free_minor(); 634*0Sstevel@tonic-gate if (ddi_soft_state_zalloc(rd_statep, minor) == DDI_FAILURE) { 635*0Sstevel@tonic-gate return (NULL); 636*0Sstevel@tonic-gate } 637*0Sstevel@tonic-gate rsp = ddi_get_soft_state(rd_statep, minor); 638*0Sstevel@tonic-gate 639*0Sstevel@tonic-gate (void) strcpy(rsp->rd_name, name); 640*0Sstevel@tonic-gate rsp->rd_dip = dip; 641*0Sstevel@tonic-gate rsp->rd_minor = minor; 642*0Sstevel@tonic-gate rsp->rd_size = size; 643*0Sstevel@tonic-gate 644*0Sstevel@tonic-gate /* 645*0Sstevel@tonic-gate * Allocate virtual window onto ramdisk. 646*0Sstevel@tonic-gate */ 647*0Sstevel@tonic-gate mutex_init(&rsp->rd_device_lock, NULL, MUTEX_DRIVER, NULL); 648*0Sstevel@tonic-gate rsp->rd_window_base = RD_WINDOW_NOT_MAPPED; 649*0Sstevel@tonic-gate rsp->rd_window_size = PAGESIZE; 650*0Sstevel@tonic-gate rsp->rd_window_virt = vmem_alloc(heap_arena, 651*0Sstevel@tonic-gate rsp->rd_window_size, VM_SLEEP); 652*0Sstevel@tonic-gate if (rsp->rd_window_virt == NULL) { 653*0Sstevel@tonic-gate goto create_failed; 654*0Sstevel@tonic-gate } 655*0Sstevel@tonic-gate 656*0Sstevel@tonic-gate /* 657*0Sstevel@tonic-gate * Allocate physical memory for non-OBP ramdisks. 658*0Sstevel@tonic-gate * Create pseudo block and raw device nodes. 659*0Sstevel@tonic-gate */ 660*0Sstevel@tonic-gate if (dip == rd_dip) { 661*0Sstevel@tonic-gate rsp->rd_npages = btopr(size); 662*0Sstevel@tonic-gate rsp->rd_ppa = rd_phys_alloc(rsp->rd_npages); 663*0Sstevel@tonic-gate if (rsp->rd_ppa == NULL) { 664*0Sstevel@tonic-gate goto create_failed; 665*0Sstevel@tonic-gate } 666*0Sstevel@tonic-gate 667*0Sstevel@tonic-gate /* 668*0Sstevel@tonic-gate * For non-OBP ramdisks the device nodes are: 669*0Sstevel@tonic-gate * 670*0Sstevel@tonic-gate * /devices/pseudo/ramdisk@0:<diskname> 671*0Sstevel@tonic-gate * /devices/pseudo/ramdisk@0:<diskname>,raw 672*0Sstevel@tonic-gate */ 673*0Sstevel@tonic-gate (void) snprintf(namebuf, sizeof (namebuf), "%s", 674*0Sstevel@tonic-gate rsp->rd_name); 675*0Sstevel@tonic-gate if (ddi_create_minor_node(dip, namebuf, S_IFBLK, minor, 676*0Sstevel@tonic-gate DDI_PSEUDO, 0) == DDI_FAILURE) { 677*0Sstevel@tonic-gate goto create_failed; 678*0Sstevel@tonic-gate } 679*0Sstevel@tonic-gate (void) snprintf(namebuf, sizeof (namebuf), "%s,raw", 680*0Sstevel@tonic-gate rsp->rd_name); 681*0Sstevel@tonic-gate if (ddi_create_minor_node(dip, namebuf, S_IFCHR, minor, 682*0Sstevel@tonic-gate DDI_PSEUDO, 0) == DDI_FAILURE) { 683*0Sstevel@tonic-gate goto create_failed; 684*0Sstevel@tonic-gate } 685*0Sstevel@tonic-gate } else { 686*0Sstevel@tonic-gate /* 687*0Sstevel@tonic-gate * For OBP-created ramdisks the device nodes are: 688*0Sstevel@tonic-gate * 689*0Sstevel@tonic-gate * /devices/ramdisk-<diskname>:a 690*0Sstevel@tonic-gate * /devices/ramdisk-<diskname>:a,raw 691*0Sstevel@tonic-gate */ 692*0Sstevel@tonic-gate if (ddi_create_minor_node(dip, "a", S_IFBLK, minor, 693*0Sstevel@tonic-gate DDI_PSEUDO, 0) == DDI_FAILURE) { 694*0Sstevel@tonic-gate goto create_failed; 695*0Sstevel@tonic-gate } 696*0Sstevel@tonic-gate if (ddi_create_minor_node(dip, "a,raw", S_IFCHR, minor, 697*0Sstevel@tonic-gate DDI_PSEUDO, 0) == DDI_FAILURE) { 698*0Sstevel@tonic-gate goto create_failed; 699*0Sstevel@tonic-gate } 700*0Sstevel@tonic-gate } 701*0Sstevel@tonic-gate 702*0Sstevel@tonic-gate /* 703*0Sstevel@tonic-gate * Create the "Size" and "Nblocks" properties. 704*0Sstevel@tonic-gate */ 705*0Sstevel@tonic-gate fulldev = makedevice(ddi_driver_major(dip), minor); 706*0Sstevel@tonic-gate Size_prop_val = size; 707*0Sstevel@tonic-gate if ((ddi_prop_update_int64(fulldev, dip, 708*0Sstevel@tonic-gate SIZE_PROP_NAME, Size_prop_val)) != DDI_PROP_SUCCESS) { 709*0Sstevel@tonic-gate goto create_failed; 710*0Sstevel@tonic-gate } 711*0Sstevel@tonic-gate Nblocks_prop_val = size / DEV_BSIZE; 712*0Sstevel@tonic-gate if ((ddi_prop_update_int64(fulldev, dip, 713*0Sstevel@tonic-gate NBLOCKS_PROP_NAME, Nblocks_prop_val)) != DDI_PROP_SUCCESS) { 714*0Sstevel@tonic-gate goto create_failed; 715*0Sstevel@tonic-gate } 716*0Sstevel@tonic-gate 717*0Sstevel@tonic-gate /* 718*0Sstevel@tonic-gate * Allocate kstat stuff. 719*0Sstevel@tonic-gate */ 720*0Sstevel@tonic-gate rsp->rd_kstat = kstat_create(RD_DRIVER_NAME, minor, NULL, 721*0Sstevel@tonic-gate "disk", KSTAT_TYPE_IO, 1, 0); 722*0Sstevel@tonic-gate if (rsp->rd_kstat) { 723*0Sstevel@tonic-gate mutex_init(&rsp->rd_kstat_lock, NULL, 724*0Sstevel@tonic-gate MUTEX_DRIVER, NULL); 725*0Sstevel@tonic-gate rsp->rd_kstat->ks_lock = &rsp->rd_kstat_lock; 726*0Sstevel@tonic-gate kstat_install(rsp->rd_kstat); 727*0Sstevel@tonic-gate } 728*0Sstevel@tonic-gate 729*0Sstevel@tonic-gate rd_fake_disk_geometry(rsp); 730*0Sstevel@tonic-gate 731*0Sstevel@tonic-gate return (rsp); 732*0Sstevel@tonic-gate 733*0Sstevel@tonic-gate create_failed: 734*0Sstevel@tonic-gate /* 735*0Sstevel@tonic-gate * Cleanup. 736*0Sstevel@tonic-gate */ 737*0Sstevel@tonic-gate rd_dealloc_resources(rsp); 738*0Sstevel@tonic-gate 739*0Sstevel@tonic-gate return (NULL); 740*0Sstevel@tonic-gate } 741*0Sstevel@tonic-gate 742*0Sstevel@tonic-gate /* 743*0Sstevel@tonic-gate * Undo what we did in rd_attach, freeing resources and removing things which 744*0Sstevel@tonic-gate * we installed. The system framework guarantees we are not active with this 745*0Sstevel@tonic-gate * devinfo node in any other entry points at this time. 746*0Sstevel@tonic-gate */ 747*0Sstevel@tonic-gate static int 748*0Sstevel@tonic-gate rd_common_detach(dev_info_t *dip) 749*0Sstevel@tonic-gate { 750*0Sstevel@tonic-gate if (dip == rd_dip) { 751*0Sstevel@tonic-gate /* 752*0Sstevel@tonic-gate * Pseudo node: can't detach if any pseudo ramdisks exist. 753*0Sstevel@tonic-gate */ 754*0Sstevel@tonic-gate if (rd_is_busy()) { 755*0Sstevel@tonic-gate return (DDI_FAILURE); 756*0Sstevel@tonic-gate } 757*0Sstevel@tonic-gate ddi_soft_state_free(rd_statep, RD_CTL_MINOR); 758*0Sstevel@tonic-gate rd_dip = NULL; 759*0Sstevel@tonic-gate } else { 760*0Sstevel@tonic-gate /* 761*0Sstevel@tonic-gate * A 'real' ramdisk; find the state and free resources. 762*0Sstevel@tonic-gate */ 763*0Sstevel@tonic-gate rd_devstate_t *rsp; 764*0Sstevel@tonic-gate 765*0Sstevel@tonic-gate if ((rsp = rd_find_dip_state(dip)) != NULL) { 766*0Sstevel@tonic-gate rd_dealloc_resources(rsp); 767*0Sstevel@tonic-gate } 768*0Sstevel@tonic-gate } 769*0Sstevel@tonic-gate ddi_remove_minor_node(dip, NULL); 770*0Sstevel@tonic-gate 771*0Sstevel@tonic-gate return (DDI_SUCCESS); 772*0Sstevel@tonic-gate } 773*0Sstevel@tonic-gate 774*0Sstevel@tonic-gate static int 775*0Sstevel@tonic-gate rd_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 776*0Sstevel@tonic-gate { 777*0Sstevel@tonic-gate char *name; 778*0Sstevel@tonic-gate rd_existing_t *ep = NULL; 779*0Sstevel@tonic-gate uint_t nep, i; 780*0Sstevel@tonic-gate size_t size = 0; 781*0Sstevel@tonic-gate rd_devstate_t *rsp; 782*0Sstevel@tonic-gate 783*0Sstevel@tonic-gate switch (cmd) { 784*0Sstevel@tonic-gate 785*0Sstevel@tonic-gate case DDI_ATTACH: 786*0Sstevel@tonic-gate mutex_enter(&rd_lock); 787*0Sstevel@tonic-gate 788*0Sstevel@tonic-gate /* 789*0Sstevel@tonic-gate * For pseudo ramdisk devinfo set up state 0 and :ctl device; 790*0Sstevel@tonic-gate * else it's an OBP-created ramdisk. 791*0Sstevel@tonic-gate */ 792*0Sstevel@tonic-gate if (is_pseudo_device(dip)) { 793*0Sstevel@tonic-gate rd_dip = dip; 794*0Sstevel@tonic-gate rd_init_tuneables(); 795*0Sstevel@tonic-gate 796*0Sstevel@tonic-gate /* 797*0Sstevel@tonic-gate * The zeroth minor is reserved for the ramdisk 798*0Sstevel@tonic-gate * 'control' device. 799*0Sstevel@tonic-gate */ 800*0Sstevel@tonic-gate if (ddi_soft_state_zalloc(rd_statep, RD_CTL_MINOR) == 801*0Sstevel@tonic-gate DDI_FAILURE) { 802*0Sstevel@tonic-gate goto attach_failed; 803*0Sstevel@tonic-gate } 804*0Sstevel@tonic-gate rsp = ddi_get_soft_state(rd_statep, RD_CTL_MINOR); 805*0Sstevel@tonic-gate rsp->rd_dip = dip; 806*0Sstevel@tonic-gate 807*0Sstevel@tonic-gate if (ddi_create_minor_node(dip, RD_CTL_NODE, 808*0Sstevel@tonic-gate S_IFCHR, 0, DDI_PSEUDO, NULL) == DDI_FAILURE) { 809*0Sstevel@tonic-gate goto attach_failed; 810*0Sstevel@tonic-gate } 811*0Sstevel@tonic-gate } else { 812*0Sstevel@tonic-gate RD_STRIP_PREFIX(name, ddi_node_name(dip)); 813*0Sstevel@tonic-gate 814*0Sstevel@tonic-gate if (strlen(name) > RD_NAME_LEN) { 815*0Sstevel@tonic-gate cmn_err(CE_CONT, 816*0Sstevel@tonic-gate "%s: name too long - ignoring\n", name); 817*0Sstevel@tonic-gate goto attach_failed; 818*0Sstevel@tonic-gate } 819*0Sstevel@tonic-gate 820*0Sstevel@tonic-gate /* 821*0Sstevel@tonic-gate * An OBP-created ramdisk must have an 'existing' 822*0Sstevel@tonic-gate * property; get and check it. 823*0Sstevel@tonic-gate */ 824*0Sstevel@tonic-gate if (ddi_prop_lookup_byte_array(DDI_DEV_T_ANY, dip, 825*0Sstevel@tonic-gate DDI_PROP_DONTPASS, RD_EXISTING_PROP_NAME, 826*0Sstevel@tonic-gate (uchar_t **)&ep, &nep) != DDI_SUCCESS) { 827*0Sstevel@tonic-gate cmn_err(CE_CONT, 828*0Sstevel@tonic-gate "%s: " RD_EXISTING_PROP_NAME 829*0Sstevel@tonic-gate " property missing\n", name); 830*0Sstevel@tonic-gate goto attach_failed; 831*0Sstevel@tonic-gate } 832*0Sstevel@tonic-gate if (nep == 0 || (nep % sizeof (*ep)) != 0) { 833*0Sstevel@tonic-gate cmn_err(CE_CONT, 834*0Sstevel@tonic-gate "%s: " RD_EXISTING_PROP_NAME 835*0Sstevel@tonic-gate " illegal size\n", name); 836*0Sstevel@tonic-gate goto attach_failed; 837*0Sstevel@tonic-gate } 838*0Sstevel@tonic-gate nep /= sizeof (*ep); 839*0Sstevel@tonic-gate 840*0Sstevel@tonic-gate /* 841*0Sstevel@tonic-gate * Calculate the size of the ramdisk. 842*0Sstevel@tonic-gate */ 843*0Sstevel@tonic-gate for (i = 0; i < nep; ++i) { 844*0Sstevel@tonic-gate size += ep[i].size; 845*0Sstevel@tonic-gate } 846*0Sstevel@tonic-gate 847*0Sstevel@tonic-gate /* 848*0Sstevel@tonic-gate * Allocate driver resources for the ramdisk. 849*0Sstevel@tonic-gate */ 850*0Sstevel@tonic-gate if ((rsp = rd_alloc_resources(name, size, 851*0Sstevel@tonic-gate dip)) == NULL) { 852*0Sstevel@tonic-gate goto attach_failed; 853*0Sstevel@tonic-gate } 854*0Sstevel@tonic-gate 855*0Sstevel@tonic-gate rsp->rd_existing = ep; 856*0Sstevel@tonic-gate rsp->rd_nexisting = nep; 857*0Sstevel@tonic-gate } 858*0Sstevel@tonic-gate 859*0Sstevel@tonic-gate mutex_exit(&rd_lock); 860*0Sstevel@tonic-gate 861*0Sstevel@tonic-gate ddi_report_dev(dip); 862*0Sstevel@tonic-gate 863*0Sstevel@tonic-gate return (DDI_SUCCESS); 864*0Sstevel@tonic-gate 865*0Sstevel@tonic-gate case DDI_RESUME: 866*0Sstevel@tonic-gate return (DDI_SUCCESS); 867*0Sstevel@tonic-gate 868*0Sstevel@tonic-gate default: 869*0Sstevel@tonic-gate return (DDI_FAILURE); 870*0Sstevel@tonic-gate } 871*0Sstevel@tonic-gate 872*0Sstevel@tonic-gate attach_failed: 873*0Sstevel@tonic-gate /* 874*0Sstevel@tonic-gate * Use our common detach routine to unallocate any stuff which 875*0Sstevel@tonic-gate * was allocated above. 876*0Sstevel@tonic-gate */ 877*0Sstevel@tonic-gate (void) rd_common_detach(dip); 878*0Sstevel@tonic-gate mutex_exit(&rd_lock); 879*0Sstevel@tonic-gate 880*0Sstevel@tonic-gate if (ep != NULL) { 881*0Sstevel@tonic-gate ddi_prop_free(ep); 882*0Sstevel@tonic-gate } 883*0Sstevel@tonic-gate return (DDI_FAILURE); 884*0Sstevel@tonic-gate } 885*0Sstevel@tonic-gate 886*0Sstevel@tonic-gate static int 887*0Sstevel@tonic-gate rd_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 888*0Sstevel@tonic-gate { 889*0Sstevel@tonic-gate int e; 890*0Sstevel@tonic-gate 891*0Sstevel@tonic-gate switch (cmd) { 892*0Sstevel@tonic-gate 893*0Sstevel@tonic-gate case DDI_DETACH: 894*0Sstevel@tonic-gate mutex_enter(&rd_lock); 895*0Sstevel@tonic-gate e = rd_common_detach(dip); 896*0Sstevel@tonic-gate mutex_exit(&rd_lock); 897*0Sstevel@tonic-gate 898*0Sstevel@tonic-gate return (e); 899*0Sstevel@tonic-gate 900*0Sstevel@tonic-gate case DDI_SUSPEND: 901*0Sstevel@tonic-gate return (DDI_SUCCESS); 902*0Sstevel@tonic-gate 903*0Sstevel@tonic-gate default: 904*0Sstevel@tonic-gate return (DDI_FAILURE); 905*0Sstevel@tonic-gate } 906*0Sstevel@tonic-gate } 907*0Sstevel@tonic-gate 908*0Sstevel@tonic-gate /*ARGSUSED*/ 909*0Sstevel@tonic-gate static int 910*0Sstevel@tonic-gate rd_getinfo(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result) 911*0Sstevel@tonic-gate { 912*0Sstevel@tonic-gate rd_devstate_t *rsp; 913*0Sstevel@tonic-gate 914*0Sstevel@tonic-gate switch (infocmd) { 915*0Sstevel@tonic-gate case DDI_INFO_DEVT2DEVINFO: 916*0Sstevel@tonic-gate if ((rsp = ddi_get_soft_state(rd_statep, 917*0Sstevel@tonic-gate getminor((dev_t)arg))) != NULL) { 918*0Sstevel@tonic-gate *result = rsp->rd_dip; 919*0Sstevel@tonic-gate return (DDI_SUCCESS); 920*0Sstevel@tonic-gate } 921*0Sstevel@tonic-gate *result = NULL; 922*0Sstevel@tonic-gate return (DDI_FAILURE); 923*0Sstevel@tonic-gate 924*0Sstevel@tonic-gate case DDI_INFO_DEVT2INSTANCE: 925*0Sstevel@tonic-gate if ((rsp = ddi_get_soft_state(rd_statep, 926*0Sstevel@tonic-gate getminor((dev_t)arg))) != NULL) { 927*0Sstevel@tonic-gate *result = (void *)(uintptr_t) 928*0Sstevel@tonic-gate ddi_get_instance(rsp->rd_dip); 929*0Sstevel@tonic-gate return (DDI_SUCCESS); 930*0Sstevel@tonic-gate } 931*0Sstevel@tonic-gate *result = NULL; 932*0Sstevel@tonic-gate return (DDI_FAILURE); 933*0Sstevel@tonic-gate 934*0Sstevel@tonic-gate default: 935*0Sstevel@tonic-gate return (DDI_FAILURE); 936*0Sstevel@tonic-gate } 937*0Sstevel@tonic-gate } 938*0Sstevel@tonic-gate 939*0Sstevel@tonic-gate /*ARGSUSED3*/ 940*0Sstevel@tonic-gate static int 941*0Sstevel@tonic-gate rd_open(dev_t *devp, int flag, int otyp, cred_t *credp) 942*0Sstevel@tonic-gate { 943*0Sstevel@tonic-gate minor_t minor; 944*0Sstevel@tonic-gate rd_devstate_t *rsp; 945*0Sstevel@tonic-gate 946*0Sstevel@tonic-gate mutex_enter(&rd_lock); 947*0Sstevel@tonic-gate 948*0Sstevel@tonic-gate minor = getminor(*devp); 949*0Sstevel@tonic-gate if (minor == RD_CTL_MINOR) { 950*0Sstevel@tonic-gate /* 951*0Sstevel@tonic-gate * Master control device; must be opened exclusively. 952*0Sstevel@tonic-gate */ 953*0Sstevel@tonic-gate if ((flag & FEXCL) != FEXCL || otyp != OTYP_CHR) { 954*0Sstevel@tonic-gate mutex_exit(&rd_lock); 955*0Sstevel@tonic-gate return (EINVAL); 956*0Sstevel@tonic-gate } 957*0Sstevel@tonic-gate 958*0Sstevel@tonic-gate rsp = ddi_get_soft_state(rd_statep, RD_CTL_MINOR); 959*0Sstevel@tonic-gate if (rsp == NULL) { 960*0Sstevel@tonic-gate mutex_exit(&rd_lock); 961*0Sstevel@tonic-gate return (ENXIO); 962*0Sstevel@tonic-gate } 963*0Sstevel@tonic-gate 964*0Sstevel@tonic-gate if (rd_is_open(rsp)) { 965*0Sstevel@tonic-gate mutex_exit(&rd_lock); 966*0Sstevel@tonic-gate return (EBUSY); 967*0Sstevel@tonic-gate } 968*0Sstevel@tonic-gate (void) rd_opened(rsp, OTYP_CHR); 969*0Sstevel@tonic-gate 970*0Sstevel@tonic-gate mutex_exit(&rd_lock); 971*0Sstevel@tonic-gate 972*0Sstevel@tonic-gate return (0); 973*0Sstevel@tonic-gate } 974*0Sstevel@tonic-gate 975*0Sstevel@tonic-gate rsp = ddi_get_soft_state(rd_statep, minor); 976*0Sstevel@tonic-gate if (rsp == NULL) { 977*0Sstevel@tonic-gate mutex_exit(&rd_lock); 978*0Sstevel@tonic-gate return (ENXIO); 979*0Sstevel@tonic-gate } 980*0Sstevel@tonic-gate 981*0Sstevel@tonic-gate if (rd_opened(rsp, otyp) == -1) { 982*0Sstevel@tonic-gate mutex_exit(&rd_lock); 983*0Sstevel@tonic-gate return (EINVAL); 984*0Sstevel@tonic-gate } 985*0Sstevel@tonic-gate 986*0Sstevel@tonic-gate mutex_exit(&rd_lock); 987*0Sstevel@tonic-gate return (0); 988*0Sstevel@tonic-gate } 989*0Sstevel@tonic-gate 990*0Sstevel@tonic-gate /*ARGSUSED*/ 991*0Sstevel@tonic-gate static int 992*0Sstevel@tonic-gate rd_close(dev_t dev, int flag, int otyp, struct cred *credp) 993*0Sstevel@tonic-gate { 994*0Sstevel@tonic-gate minor_t minor; 995*0Sstevel@tonic-gate rd_devstate_t *rsp; 996*0Sstevel@tonic-gate 997*0Sstevel@tonic-gate mutex_enter(&rd_lock); 998*0Sstevel@tonic-gate 999*0Sstevel@tonic-gate minor = getminor(dev); 1000*0Sstevel@tonic-gate 1001*0Sstevel@tonic-gate rsp = ddi_get_soft_state(rd_statep, minor); 1002*0Sstevel@tonic-gate if (rsp == NULL) { 1003*0Sstevel@tonic-gate mutex_exit(&rd_lock); 1004*0Sstevel@tonic-gate return (EINVAL); 1005*0Sstevel@tonic-gate } 1006*0Sstevel@tonic-gate 1007*0Sstevel@tonic-gate rd_closed(rsp, otyp); 1008*0Sstevel@tonic-gate 1009*0Sstevel@tonic-gate mutex_exit(&rd_lock); 1010*0Sstevel@tonic-gate 1011*0Sstevel@tonic-gate return (0); 1012*0Sstevel@tonic-gate } 1013*0Sstevel@tonic-gate 1014*0Sstevel@tonic-gate static void 1015*0Sstevel@tonic-gate rd_minphys(struct buf *bp) 1016*0Sstevel@tonic-gate { 1017*0Sstevel@tonic-gate if (bp->b_bcount > rd_maxphys) { 1018*0Sstevel@tonic-gate bp->b_bcount = rd_maxphys; 1019*0Sstevel@tonic-gate } 1020*0Sstevel@tonic-gate } 1021*0Sstevel@tonic-gate 1022*0Sstevel@tonic-gate static void 1023*0Sstevel@tonic-gate rd_rw(rd_devstate_t *rsp, struct buf *bp, offset_t offset, size_t nbytes) 1024*0Sstevel@tonic-gate { 1025*0Sstevel@tonic-gate int reading = bp->b_flags & B_READ; 1026*0Sstevel@tonic-gate caddr_t buf_addr; 1027*0Sstevel@tonic-gate 1028*0Sstevel@tonic-gate bp_mapin(bp); 1029*0Sstevel@tonic-gate buf_addr = bp->b_un.b_addr; 1030*0Sstevel@tonic-gate 1031*0Sstevel@tonic-gate while (nbytes > 0) { 1032*0Sstevel@tonic-gate offset_t off_in_window; 1033*0Sstevel@tonic-gate size_t rem_in_window, copy_bytes; 1034*0Sstevel@tonic-gate caddr_t raddr; 1035*0Sstevel@tonic-gate 1036*0Sstevel@tonic-gate mutex_enter(&rsp->rd_device_lock); 1037*0Sstevel@tonic-gate rd_map_window(rsp, offset); 1038*0Sstevel@tonic-gate 1039*0Sstevel@tonic-gate off_in_window = offset - rsp->rd_window_base; 1040*0Sstevel@tonic-gate rem_in_window = rsp->rd_window_size - off_in_window; 1041*0Sstevel@tonic-gate 1042*0Sstevel@tonic-gate raddr = rsp->rd_window_virt + off_in_window; 1043*0Sstevel@tonic-gate copy_bytes = MIN(nbytes, rem_in_window); 1044*0Sstevel@tonic-gate 1045*0Sstevel@tonic-gate if (reading) { 1046*0Sstevel@tonic-gate (void) bcopy(raddr, buf_addr, copy_bytes); 1047*0Sstevel@tonic-gate } else { 1048*0Sstevel@tonic-gate (void) bcopy(buf_addr, raddr, copy_bytes); 1049*0Sstevel@tonic-gate } 1050*0Sstevel@tonic-gate mutex_exit(&rsp->rd_device_lock); 1051*0Sstevel@tonic-gate 1052*0Sstevel@tonic-gate offset += copy_bytes; 1053*0Sstevel@tonic-gate buf_addr += copy_bytes; 1054*0Sstevel@tonic-gate nbytes -= copy_bytes; 1055*0Sstevel@tonic-gate } 1056*0Sstevel@tonic-gate } 1057*0Sstevel@tonic-gate 1058*0Sstevel@tonic-gate static int 1059*0Sstevel@tonic-gate rd_strategy(struct buf *bp) 1060*0Sstevel@tonic-gate { 1061*0Sstevel@tonic-gate rd_devstate_t *rsp; 1062*0Sstevel@tonic-gate offset_t offset; 1063*0Sstevel@tonic-gate 1064*0Sstevel@tonic-gate rsp = ddi_get_soft_state(rd_statep, getminor(bp->b_edev)); 1065*0Sstevel@tonic-gate offset = bp->b_blkno * DEV_BSIZE; 1066*0Sstevel@tonic-gate 1067*0Sstevel@tonic-gate if (rsp == NULL) { 1068*0Sstevel@tonic-gate bp->b_error = ENXIO; 1069*0Sstevel@tonic-gate bp->b_flags |= B_ERROR; 1070*0Sstevel@tonic-gate } else if (offset >= rsp->rd_size) { 1071*0Sstevel@tonic-gate bp->b_error = EINVAL; 1072*0Sstevel@tonic-gate bp->b_flags |= B_ERROR; 1073*0Sstevel@tonic-gate } else { 1074*0Sstevel@tonic-gate size_t nbytes; 1075*0Sstevel@tonic-gate 1076*0Sstevel@tonic-gate if (rsp->rd_kstat) { 1077*0Sstevel@tonic-gate mutex_enter(rsp->rd_kstat->ks_lock); 1078*0Sstevel@tonic-gate kstat_runq_enter(KSTAT_IO_PTR(rsp->rd_kstat)); 1079*0Sstevel@tonic-gate mutex_exit(rsp->rd_kstat->ks_lock); 1080*0Sstevel@tonic-gate } 1081*0Sstevel@tonic-gate 1082*0Sstevel@tonic-gate nbytes = min(bp->b_bcount, rsp->rd_size - offset); 1083*0Sstevel@tonic-gate 1084*0Sstevel@tonic-gate rd_rw(rsp, bp, offset, nbytes); 1085*0Sstevel@tonic-gate 1086*0Sstevel@tonic-gate bp->b_resid = bp->b_bcount - nbytes; 1087*0Sstevel@tonic-gate 1088*0Sstevel@tonic-gate if (rsp->rd_kstat) { 1089*0Sstevel@tonic-gate kstat_io_t *kioptr; 1090*0Sstevel@tonic-gate 1091*0Sstevel@tonic-gate mutex_enter(rsp->rd_kstat->ks_lock); 1092*0Sstevel@tonic-gate kioptr = KSTAT_IO_PTR(rsp->rd_kstat); 1093*0Sstevel@tonic-gate if (bp->b_flags & B_READ) { 1094*0Sstevel@tonic-gate kioptr->nread += nbytes; 1095*0Sstevel@tonic-gate kioptr->reads++; 1096*0Sstevel@tonic-gate } else { 1097*0Sstevel@tonic-gate kioptr->nwritten += nbytes; 1098*0Sstevel@tonic-gate kioptr->writes++; 1099*0Sstevel@tonic-gate } 1100*0Sstevel@tonic-gate kstat_runq_exit(kioptr); 1101*0Sstevel@tonic-gate mutex_exit(rsp->rd_kstat->ks_lock); 1102*0Sstevel@tonic-gate } 1103*0Sstevel@tonic-gate } 1104*0Sstevel@tonic-gate 1105*0Sstevel@tonic-gate biodone(bp); 1106*0Sstevel@tonic-gate return (0); 1107*0Sstevel@tonic-gate } 1108*0Sstevel@tonic-gate 1109*0Sstevel@tonic-gate /*ARGSUSED*/ 1110*0Sstevel@tonic-gate static int 1111*0Sstevel@tonic-gate rd_read(dev_t dev, struct uio *uiop, cred_t *credp) 1112*0Sstevel@tonic-gate { 1113*0Sstevel@tonic-gate rd_devstate_t *rsp; 1114*0Sstevel@tonic-gate 1115*0Sstevel@tonic-gate rsp = ddi_get_soft_state(rd_statep, getminor(dev)); 1116*0Sstevel@tonic-gate 1117*0Sstevel@tonic-gate if (uiop->uio_offset >= rsp->rd_size) 1118*0Sstevel@tonic-gate return (EINVAL); 1119*0Sstevel@tonic-gate 1120*0Sstevel@tonic-gate return (physio(rd_strategy, NULL, dev, B_READ, rd_minphys, uiop)); 1121*0Sstevel@tonic-gate } 1122*0Sstevel@tonic-gate 1123*0Sstevel@tonic-gate /*ARGSUSED*/ 1124*0Sstevel@tonic-gate static int 1125*0Sstevel@tonic-gate rd_write(dev_t dev, register struct uio *uiop, cred_t *credp) 1126*0Sstevel@tonic-gate { 1127*0Sstevel@tonic-gate rd_devstate_t *rsp; 1128*0Sstevel@tonic-gate 1129*0Sstevel@tonic-gate rsp = ddi_get_soft_state(rd_statep, getminor(dev)); 1130*0Sstevel@tonic-gate 1131*0Sstevel@tonic-gate if (uiop->uio_offset >= rsp->rd_size) 1132*0Sstevel@tonic-gate return (EINVAL); 1133*0Sstevel@tonic-gate 1134*0Sstevel@tonic-gate return (physio(rd_strategy, NULL, dev, B_WRITE, rd_minphys, uiop)); 1135*0Sstevel@tonic-gate } 1136*0Sstevel@tonic-gate 1137*0Sstevel@tonic-gate /*ARGSUSED*/ 1138*0Sstevel@tonic-gate static int 1139*0Sstevel@tonic-gate rd_create_disk(dev_t dev, struct rd_ioctl *urip, int mode, int *rvalp) 1140*0Sstevel@tonic-gate { 1141*0Sstevel@tonic-gate struct rd_ioctl kri; 1142*0Sstevel@tonic-gate size_t size; 1143*0Sstevel@tonic-gate rd_devstate_t *rsp; 1144*0Sstevel@tonic-gate 1145*0Sstevel@tonic-gate if (ddi_copyin(urip, &kri, sizeof (kri), mode) == -1) { 1146*0Sstevel@tonic-gate return (EFAULT); 1147*0Sstevel@tonic-gate } 1148*0Sstevel@tonic-gate 1149*0Sstevel@tonic-gate kri.ri_name[RD_NAME_LEN] = '\0'; 1150*0Sstevel@tonic-gate 1151*0Sstevel@tonic-gate size = kri.ri_size; 1152*0Sstevel@tonic-gate if (size == 0) { 1153*0Sstevel@tonic-gate return (EINVAL); 1154*0Sstevel@tonic-gate } 1155*0Sstevel@tonic-gate size = ptob(btopr(size)); 1156*0Sstevel@tonic-gate 1157*0Sstevel@tonic-gate mutex_enter(&rd_lock); 1158*0Sstevel@tonic-gate 1159*0Sstevel@tonic-gate if (rd_find_named_disk(kri.ri_name) != NULL) { 1160*0Sstevel@tonic-gate mutex_exit(&rd_lock); 1161*0Sstevel@tonic-gate return (EEXIST); 1162*0Sstevel@tonic-gate } 1163*0Sstevel@tonic-gate 1164*0Sstevel@tonic-gate rsp = rd_alloc_resources(kri.ri_name, size, rd_dip); 1165*0Sstevel@tonic-gate if (rsp == NULL) { 1166*0Sstevel@tonic-gate mutex_exit(&rd_lock); 1167*0Sstevel@tonic-gate return (EAGAIN); 1168*0Sstevel@tonic-gate } 1169*0Sstevel@tonic-gate 1170*0Sstevel@tonic-gate mutex_exit(&rd_lock); 1171*0Sstevel@tonic-gate 1172*0Sstevel@tonic-gate return (ddi_copyout(&kri, urip, sizeof (kri), mode) == -1 ? EFAULT : 0); 1173*0Sstevel@tonic-gate } 1174*0Sstevel@tonic-gate 1175*0Sstevel@tonic-gate /*ARGSUSED*/ 1176*0Sstevel@tonic-gate static int 1177*0Sstevel@tonic-gate rd_delete_disk(dev_t dev, struct rd_ioctl *urip, int mode) 1178*0Sstevel@tonic-gate { 1179*0Sstevel@tonic-gate struct rd_ioctl kri; 1180*0Sstevel@tonic-gate rd_devstate_t *rsp; 1181*0Sstevel@tonic-gate 1182*0Sstevel@tonic-gate if (ddi_copyin(urip, &kri, sizeof (kri), mode) == -1) { 1183*0Sstevel@tonic-gate return (EFAULT); 1184*0Sstevel@tonic-gate } 1185*0Sstevel@tonic-gate 1186*0Sstevel@tonic-gate kri.ri_name[RD_NAME_LEN] = '\0'; 1187*0Sstevel@tonic-gate 1188*0Sstevel@tonic-gate mutex_enter(&rd_lock); 1189*0Sstevel@tonic-gate 1190*0Sstevel@tonic-gate rsp = rd_find_named_disk(kri.ri_name); 1191*0Sstevel@tonic-gate if (rsp == NULL || rsp->rd_dip != rd_dip) { 1192*0Sstevel@tonic-gate mutex_exit(&rd_lock); 1193*0Sstevel@tonic-gate return (EINVAL); 1194*0Sstevel@tonic-gate } 1195*0Sstevel@tonic-gate if (rd_is_open(rsp)) { 1196*0Sstevel@tonic-gate mutex_exit(&rd_lock); 1197*0Sstevel@tonic-gate return (EBUSY); 1198*0Sstevel@tonic-gate } 1199*0Sstevel@tonic-gate 1200*0Sstevel@tonic-gate rd_dealloc_resources(rsp); 1201*0Sstevel@tonic-gate 1202*0Sstevel@tonic-gate mutex_exit(&rd_lock); 1203*0Sstevel@tonic-gate 1204*0Sstevel@tonic-gate return (0); 1205*0Sstevel@tonic-gate } 1206*0Sstevel@tonic-gate 1207*0Sstevel@tonic-gate /*ARGSUSED*/ 1208*0Sstevel@tonic-gate static int 1209*0Sstevel@tonic-gate rd_ioctl(dev_t dev, int cmd, intptr_t arg, int mode, cred_t *credp, int *rvalp) 1210*0Sstevel@tonic-gate { 1211*0Sstevel@tonic-gate minor_t minor; 1212*0Sstevel@tonic-gate int error; 1213*0Sstevel@tonic-gate enum dkio_state dkstate; 1214*0Sstevel@tonic-gate rd_devstate_t *rsp; 1215*0Sstevel@tonic-gate 1216*0Sstevel@tonic-gate minor = getminor(dev); 1217*0Sstevel@tonic-gate 1218*0Sstevel@tonic-gate /* 1219*0Sstevel@tonic-gate * Ramdisk ioctls only apply to the master device. 1220*0Sstevel@tonic-gate */ 1221*0Sstevel@tonic-gate if (minor == RD_CTL_MINOR) { 1222*0Sstevel@tonic-gate struct rd_ioctl *rip = (struct rd_ioctl *)arg; 1223*0Sstevel@tonic-gate 1224*0Sstevel@tonic-gate /* 1225*0Sstevel@tonic-gate * The query commands only need read-access - i.e., normal 1226*0Sstevel@tonic-gate * users are allowed to do those on the controlling device 1227*0Sstevel@tonic-gate * as long as they can open it read-only. 1228*0Sstevel@tonic-gate */ 1229*0Sstevel@tonic-gate switch (cmd) { 1230*0Sstevel@tonic-gate case RD_CREATE_DISK: 1231*0Sstevel@tonic-gate if ((mode & FWRITE) == 0) 1232*0Sstevel@tonic-gate return (EPERM); 1233*0Sstevel@tonic-gate return (rd_create_disk(dev, rip, mode, rvalp)); 1234*0Sstevel@tonic-gate 1235*0Sstevel@tonic-gate case RD_DELETE_DISK: 1236*0Sstevel@tonic-gate if ((mode & FWRITE) == 0) 1237*0Sstevel@tonic-gate return (EPERM); 1238*0Sstevel@tonic-gate return (rd_delete_disk(dev, rip, mode)); 1239*0Sstevel@tonic-gate 1240*0Sstevel@tonic-gate default: 1241*0Sstevel@tonic-gate return (EINVAL); 1242*0Sstevel@tonic-gate } 1243*0Sstevel@tonic-gate } 1244*0Sstevel@tonic-gate 1245*0Sstevel@tonic-gate rsp = ddi_get_soft_state(rd_statep, minor); 1246*0Sstevel@tonic-gate if (rsp == NULL) { 1247*0Sstevel@tonic-gate return (ENXIO); 1248*0Sstevel@tonic-gate } 1249*0Sstevel@tonic-gate 1250*0Sstevel@tonic-gate /* 1251*0Sstevel@tonic-gate * These are for faking out utilities like newfs. 1252*0Sstevel@tonic-gate */ 1253*0Sstevel@tonic-gate switch (cmd) { 1254*0Sstevel@tonic-gate case VOLIOCINFO: 1255*0Sstevel@tonic-gate /* pcfs does this to see if it needs to set PCFS_NOCHK */ 1256*0Sstevel@tonic-gate /* 0 means it should set it */ 1257*0Sstevel@tonic-gate return (0); 1258*0Sstevel@tonic-gate case DKIOCGVTOC: 1259*0Sstevel@tonic-gate switch (ddi_model_convert_from(mode & FMODELS)) { 1260*0Sstevel@tonic-gate case DDI_MODEL_ILP32: { 1261*0Sstevel@tonic-gate struct vtoc32 vtoc32; 1262*0Sstevel@tonic-gate 1263*0Sstevel@tonic-gate vtoctovtoc32(rsp->rd_vtoc, vtoc32); 1264*0Sstevel@tonic-gate if (ddi_copyout(&vtoc32, (void *)arg, 1265*0Sstevel@tonic-gate sizeof (struct vtoc32), mode)) 1266*0Sstevel@tonic-gate return (EFAULT); 1267*0Sstevel@tonic-gate } 1268*0Sstevel@tonic-gate break; 1269*0Sstevel@tonic-gate 1270*0Sstevel@tonic-gate case DDI_MODEL_NONE: 1271*0Sstevel@tonic-gate if (ddi_copyout(&rsp->rd_vtoc, (void *)arg, 1272*0Sstevel@tonic-gate sizeof (struct vtoc), mode)) 1273*0Sstevel@tonic-gate return (EFAULT); 1274*0Sstevel@tonic-gate break; 1275*0Sstevel@tonic-gate } 1276*0Sstevel@tonic-gate return (0); 1277*0Sstevel@tonic-gate case DKIOCINFO: 1278*0Sstevel@tonic-gate error = ddi_copyout(&rsp->rd_ci, (void *)arg, 1279*0Sstevel@tonic-gate sizeof (struct dk_cinfo), mode); 1280*0Sstevel@tonic-gate if (error) 1281*0Sstevel@tonic-gate return (EFAULT); 1282*0Sstevel@tonic-gate return (0); 1283*0Sstevel@tonic-gate case DKIOCG_VIRTGEOM: 1284*0Sstevel@tonic-gate case DKIOCG_PHYGEOM: 1285*0Sstevel@tonic-gate case DKIOCGGEOM: 1286*0Sstevel@tonic-gate error = ddi_copyout(&rsp->rd_dkg, (void *)arg, 1287*0Sstevel@tonic-gate sizeof (struct dk_geom), mode); 1288*0Sstevel@tonic-gate if (error) 1289*0Sstevel@tonic-gate return (EFAULT); 1290*0Sstevel@tonic-gate return (0); 1291*0Sstevel@tonic-gate case DKIOCSTATE: 1292*0Sstevel@tonic-gate /* the file is always there */ 1293*0Sstevel@tonic-gate dkstate = DKIO_INSERTED; 1294*0Sstevel@tonic-gate error = ddi_copyout(&dkstate, (void *)arg, 1295*0Sstevel@tonic-gate sizeof (enum dkio_state), mode); 1296*0Sstevel@tonic-gate if (error) 1297*0Sstevel@tonic-gate return (EFAULT); 1298*0Sstevel@tonic-gate return (0); 1299*0Sstevel@tonic-gate default: 1300*0Sstevel@tonic-gate return (ENOTTY); 1301*0Sstevel@tonic-gate } 1302*0Sstevel@tonic-gate } 1303*0Sstevel@tonic-gate 1304*0Sstevel@tonic-gate 1305*0Sstevel@tonic-gate static struct cb_ops rd_cb_ops = { 1306*0Sstevel@tonic-gate rd_open, 1307*0Sstevel@tonic-gate rd_close, 1308*0Sstevel@tonic-gate rd_strategy, 1309*0Sstevel@tonic-gate nodev, 1310*0Sstevel@tonic-gate nodev, /* dump */ 1311*0Sstevel@tonic-gate rd_read, 1312*0Sstevel@tonic-gate rd_write, 1313*0Sstevel@tonic-gate rd_ioctl, 1314*0Sstevel@tonic-gate nodev, /* devmap */ 1315*0Sstevel@tonic-gate nodev, /* mmap */ 1316*0Sstevel@tonic-gate nodev, /* segmap */ 1317*0Sstevel@tonic-gate nochpoll, /* poll */ 1318*0Sstevel@tonic-gate ddi_prop_op, 1319*0Sstevel@tonic-gate NULL, 1320*0Sstevel@tonic-gate D_NEW | D_MP 1321*0Sstevel@tonic-gate }; 1322*0Sstevel@tonic-gate 1323*0Sstevel@tonic-gate static struct dev_ops rd_ops = { 1324*0Sstevel@tonic-gate DEVO_REV, 1325*0Sstevel@tonic-gate 0, 1326*0Sstevel@tonic-gate rd_getinfo, 1327*0Sstevel@tonic-gate nulldev, /* identify */ 1328*0Sstevel@tonic-gate nulldev, /* probe */ 1329*0Sstevel@tonic-gate rd_attach, 1330*0Sstevel@tonic-gate rd_detach, 1331*0Sstevel@tonic-gate nodev, /* reset */ 1332*0Sstevel@tonic-gate &rd_cb_ops, 1333*0Sstevel@tonic-gate (struct bus_ops *)0 1334*0Sstevel@tonic-gate }; 1335*0Sstevel@tonic-gate 1336*0Sstevel@tonic-gate 1337*0Sstevel@tonic-gate extern struct mod_ops mod_driverops; 1338*0Sstevel@tonic-gate 1339*0Sstevel@tonic-gate static struct modldrv modldrv = { 1340*0Sstevel@tonic-gate &mod_driverops, 1341*0Sstevel@tonic-gate "ramdisk driver v%I%", 1342*0Sstevel@tonic-gate &rd_ops 1343*0Sstevel@tonic-gate }; 1344*0Sstevel@tonic-gate 1345*0Sstevel@tonic-gate static struct modlinkage modlinkage = { 1346*0Sstevel@tonic-gate MODREV_1, 1347*0Sstevel@tonic-gate &modldrv, 1348*0Sstevel@tonic-gate 0 1349*0Sstevel@tonic-gate }; 1350*0Sstevel@tonic-gate 1351*0Sstevel@tonic-gate int 1352*0Sstevel@tonic-gate _init(void) 1353*0Sstevel@tonic-gate { 1354*0Sstevel@tonic-gate int e; 1355*0Sstevel@tonic-gate 1356*0Sstevel@tonic-gate if ((e = ddi_soft_state_init(&rd_statep, 1357*0Sstevel@tonic-gate sizeof (rd_devstate_t), 0)) != 0) { 1358*0Sstevel@tonic-gate return (e); 1359*0Sstevel@tonic-gate } 1360*0Sstevel@tonic-gate 1361*0Sstevel@tonic-gate mutex_init(&rd_lock, NULL, MUTEX_DRIVER, NULL); 1362*0Sstevel@tonic-gate 1363*0Sstevel@tonic-gate if ((e = mod_install(&modlinkage)) != 0) { 1364*0Sstevel@tonic-gate mutex_destroy(&rd_lock); 1365*0Sstevel@tonic-gate ddi_soft_state_fini(&rd_statep); 1366*0Sstevel@tonic-gate } 1367*0Sstevel@tonic-gate 1368*0Sstevel@tonic-gate return (e); 1369*0Sstevel@tonic-gate } 1370*0Sstevel@tonic-gate 1371*0Sstevel@tonic-gate int 1372*0Sstevel@tonic-gate _fini(void) 1373*0Sstevel@tonic-gate { 1374*0Sstevel@tonic-gate int e; 1375*0Sstevel@tonic-gate 1376*0Sstevel@tonic-gate if ((e = mod_remove(&modlinkage)) != 0) { 1377*0Sstevel@tonic-gate return (e); 1378*0Sstevel@tonic-gate } 1379*0Sstevel@tonic-gate 1380*0Sstevel@tonic-gate ddi_soft_state_fini(&rd_statep); 1381*0Sstevel@tonic-gate mutex_destroy(&rd_lock); 1382*0Sstevel@tonic-gate 1383*0Sstevel@tonic-gate return (e); 1384*0Sstevel@tonic-gate } 1385*0Sstevel@tonic-gate 1386*0Sstevel@tonic-gate int 1387*0Sstevel@tonic-gate _info(struct modinfo *modinfop) 1388*0Sstevel@tonic-gate { 1389*0Sstevel@tonic-gate return (mod_info(&modlinkage, modinfop)); 1390*0Sstevel@tonic-gate } 1391