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 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* 27 * PCI nexus HotPlug devctl interface 28 */ 29 #include <sys/types.h> 30 #include <sys/conf.h> 31 #include <sys/kmem.h> 32 #include <sys/async.h> 33 #include <sys/sysmacros.h> 34 #include <sys/sunddi.h> 35 #include <sys/sunndi.h> 36 #include <sys/ddi_impldefs.h> 37 #include <sys/pci/pci_obj.h> 38 #include <sys/pci_tools.h> 39 #include <sys/pci/pci_tools_ext.h> 40 #include <sys/open.h> 41 #include <sys/errno.h> 42 #include <sys/file.h> 43 #include <sys/policy.h> 44 #include <sys/hotplug/pci/pcihp.h> 45 46 /*LINTLIBRARY*/ 47 48 static int pci_open(dev_t *devp, int flags, int otyp, cred_t *credp); 49 static int pci_close(dev_t dev, int flags, int otyp, cred_t *credp); 50 static int pci_devctl_ioctl(dev_info_t *dip, int cmd, intptr_t arg, int mode, 51 cred_t *credp, int *rvalp); 52 static int pci_ioctl(dev_t dev, int cmd, intptr_t arg, int mode, 53 cred_t *credp, int *rvalp); 54 static int pci_prop_op(dev_t dev, dev_info_t *dip, ddi_prop_op_t prop_op, 55 int flags, char *name, caddr_t valuep, int *lengthp); 56 57 struct cb_ops pci_cb_ops = { 58 pci_open, /* open */ 59 pci_close, /* close */ 60 nodev, /* strategy */ 61 nodev, /* print */ 62 nodev, /* dump */ 63 nodev, /* read */ 64 nodev, /* write */ 65 pci_ioctl, /* ioctl */ 66 nodev, /* devmap */ 67 nodev, /* mmap */ 68 nodev, /* segmap */ 69 nochpoll, /* poll */ 70 pci_prop_op, /* cb_prop_op */ 71 NULL, /* streamtab */ 72 D_NEW | D_MP | D_HOTPLUG, /* Driver compatibility flag */ 73 CB_REV, /* rev */ 74 nodev, /* int (*cb_aread)() */ 75 nodev /* int (*cb_awrite)() */ 76 }; 77 78 extern struct cb_ops *pcihp_ops; 79 80 /* ARGSUSED3 */ 81 static int 82 pci_open(dev_t *devp, int flags, int otyp, cred_t *credp) 83 { 84 pci_t *pci_p; 85 int rval; 86 uint_t orig_pci_soft_state; 87 88 /* 89 * Make sure the open is for the right file type. 90 */ 91 if (otyp != OTYP_CHR) 92 return (EINVAL); 93 94 /* 95 * Get the soft state structure for the device. 96 */ 97 pci_p = DEV_TO_SOFTSTATE(*devp); 98 if (pci_p == NULL) 99 return (ENXIO); 100 101 /* 102 * Handle the open by tracking the device state. 103 */ 104 DEBUG2(DBG_OPEN, pci_p->pci_dip, "devp=%x: flags=%x\n", devp, flags); 105 mutex_enter(&pci_p->pci_mutex); 106 orig_pci_soft_state = pci_p->pci_soft_state; 107 if (flags & FEXCL) { 108 if (pci_p->pci_soft_state != PCI_SOFT_STATE_CLOSED) { 109 mutex_exit(&pci_p->pci_mutex); 110 DEBUG0(DBG_OPEN, pci_p->pci_dip, "busy\n"); 111 return (EBUSY); 112 } 113 pci_p->pci_soft_state = PCI_SOFT_STATE_OPEN_EXCL; 114 } else { 115 if (pci_p->pci_soft_state == PCI_SOFT_STATE_OPEN_EXCL) { 116 mutex_exit(&pci_p->pci_mutex); 117 DEBUG0(DBG_OPEN, pci_p->pci_dip, "busy\n"); 118 return (EBUSY); 119 } 120 pci_p->pci_soft_state = PCI_SOFT_STATE_OPEN; 121 } 122 123 if (pci_p->hotplug_capable == B_TRUE) { 124 if (rval = pcihp_ops->cb_open(devp, flags, otyp, credp)) { 125 pci_p->pci_soft_state = orig_pci_soft_state; 126 mutex_exit(&pci_p->pci_mutex); 127 return (rval); 128 } 129 } 130 131 mutex_exit(&pci_p->pci_mutex); 132 133 return (0); 134 } 135 136 137 /* ARGSUSED */ 138 static int 139 pci_close(dev_t dev, int flags, int otyp, cred_t *credp) 140 { 141 pci_t *pci_p; 142 int rval; 143 144 if (otyp != OTYP_CHR) 145 return (EINVAL); 146 147 pci_p = DEV_TO_SOFTSTATE(dev); 148 if (pci_p == NULL) 149 return (ENXIO); 150 151 DEBUG2(DBG_CLOSE, pci_p->pci_dip, "dev=%x: flags=%x\n", dev, flags); 152 mutex_enter(&pci_p->pci_mutex); 153 154 if (pci_p->hotplug_capable == B_TRUE) 155 if (rval = pcihp_ops->cb_close(dev, flags, otyp, credp)) { 156 mutex_exit(&pci_p->pci_mutex); 157 return (rval); 158 } 159 160 pci_p->pci_soft_state = PCI_SOFT_STATE_CLOSED; 161 mutex_exit(&pci_p->pci_mutex); 162 return (0); 163 } 164 165 /* ARGSUSED */ 166 static int 167 pci_devctl_ioctl(dev_info_t *dip, int cmd, intptr_t arg, int mode, 168 cred_t *credp, int *rvalp) 169 { 170 int rv = 0; 171 struct devctl_iocdata *dcp; 172 uint_t bus_state; 173 174 /* 175 * We can use the generic implementation for these ioctls 176 */ 177 switch (cmd) { 178 case DEVCTL_DEVICE_GETSTATE: 179 case DEVCTL_DEVICE_ONLINE: 180 case DEVCTL_DEVICE_OFFLINE: 181 case DEVCTL_BUS_GETSTATE: 182 return (ndi_devctl_ioctl(dip, cmd, arg, mode, 0)); 183 } 184 185 /* 186 * read devctl ioctl data 187 */ 188 if (ndi_dc_allochdl((void *)arg, &dcp) != NDI_SUCCESS) 189 return (EFAULT); 190 191 switch (cmd) { 192 193 case DEVCTL_DEVICE_RESET: 194 DEBUG0(DBG_IOCTL, dip, "DEVCTL_DEVICE_RESET\n"); 195 rv = ENOTSUP; 196 break; 197 198 199 case DEVCTL_BUS_QUIESCE: 200 DEBUG0(DBG_IOCTL, dip, "DEVCTL_BUS_QUIESCE\n"); 201 if (ndi_get_bus_state(dip, &bus_state) == NDI_SUCCESS) 202 if (bus_state == BUS_QUIESCED) 203 break; 204 (void) ndi_set_bus_state(dip, BUS_QUIESCED); 205 break; 206 207 case DEVCTL_BUS_UNQUIESCE: 208 DEBUG0(DBG_IOCTL, dip, "DEVCTL_BUS_UNQUIESCE\n"); 209 if (ndi_get_bus_state(dip, &bus_state) == NDI_SUCCESS) 210 if (bus_state == BUS_ACTIVE) 211 break; 212 (void) ndi_set_bus_state(dip, BUS_ACTIVE); 213 break; 214 215 case DEVCTL_BUS_RESET: 216 DEBUG0(DBG_IOCTL, dip, "DEVCTL_BUS_RESET\n"); 217 rv = ENOTSUP; 218 break; 219 220 case DEVCTL_BUS_RESETALL: 221 DEBUG0(DBG_IOCTL, dip, "DEVCTL_BUS_RESETALL\n"); 222 rv = ENOTSUP; 223 break; 224 225 default: 226 rv = ENOTTY; 227 } 228 229 ndi_dc_freehdl(dcp); 230 return (rv); 231 } 232 233 234 static int 235 pci_ioctl(dev_t dev, int cmd, intptr_t arg, int mode, cred_t *credp, int *rvalp) 236 { 237 pci_t *pci_p; 238 dev_info_t *dip; 239 minor_t minor = getminor(dev); 240 int rv = ENOTTY; 241 242 pci_p = DEV_TO_SOFTSTATE(dev); 243 if (pci_p == NULL) 244 return (ENXIO); 245 246 dip = pci_p->pci_dip; 247 DEBUG2(DBG_IOCTL, dip, "dev=%x: cmd=%x\n", dev, cmd); 248 249 #ifdef PCI_DMA_TEST 250 if (IS_DMATEST(cmd)) { 251 *rvalp = pci_dma_test(cmd, dip, pci_p, arg); 252 return (0); 253 } 254 #endif 255 256 switch (PCIHP_AP_MINOR_NUM_TO_PCI_DEVNUM(minor)) { 257 case PCI_TOOL_REG_MINOR_NUM: 258 259 switch (cmd) { 260 case PCITOOL_DEVICE_SET_REG: 261 case PCITOOL_DEVICE_GET_REG: 262 263 /* Require full privileges. */ 264 if (secpolicy_kmdb(credp)) 265 rv = EPERM; 266 else 267 rv = pcitool_dev_reg_ops( 268 dev, (void *)arg, cmd, mode); 269 break; 270 271 case PCITOOL_NEXUS_SET_REG: 272 case PCITOOL_NEXUS_GET_REG: 273 274 /* Require full privileges. */ 275 if (secpolicy_kmdb(credp)) 276 rv = EPERM; 277 else 278 rv = pcitool_bus_reg_ops( 279 dev, (void *)arg, cmd, mode); 280 break; 281 } 282 283 break; 284 285 case PCI_TOOL_INTR_MINOR_NUM: 286 287 switch (cmd) { 288 case PCITOOL_DEVICE_SET_INTR: 289 290 /* Require PRIV_SYS_RES_CONFIG, same as psradm */ 291 if (secpolicy_ponline(credp)) { 292 rv = EPERM; 293 break; 294 } 295 296 /*FALLTHRU*/ 297 /* These require no special privileges. */ 298 case PCITOOL_DEVICE_GET_INTR: 299 case PCITOOL_SYSTEM_INTR_INFO: 300 rv = pcitool_intr_admn(dev, (void *)arg, cmd, mode); 301 break; 302 } 303 304 break; 305 306 /* 307 * All non-PCItool ioctls go through here, including: 308 * devctl ioctls with minor number PCIHP_DEVCTL_MINOR and 309 * those for attachment points with where minor number is the 310 * device number. 311 */ 312 default: 313 if (pci_p->hotplug_capable == B_TRUE) 314 rv = pcihp_ops->cb_ioctl( 315 dev, cmd, arg, mode, credp, rvalp); 316 else 317 rv = pci_devctl_ioctl( 318 dip, cmd, arg, mode, credp, rvalp); 319 break; 320 } 321 322 return (rv); 323 } 324 325 static int pci_prop_op(dev_t dev, dev_info_t *dip, ddi_prop_op_t prop_op, 326 int flags, char *name, caddr_t valuep, int *lengthp) 327 { 328 if (ddi_prop_exists(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, 329 "hotplug-capable")) 330 return ((pcihp_get_cb_ops())->cb_prop_op(dev, dip, 331 prop_op, flags, name, valuep, lengthp)); 332 333 return (ddi_prop_op(dev, dip, prop_op, flags, name, valuep, lengthp)); 334 } 335