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 /* 29 * PCI nexus HotPlug devctl interface 30 */ 31 #include <sys/types.h> 32 #include <sys/conf.h> 33 #include <sys/kmem.h> 34 #include <sys/async.h> 35 #include <sys/sysmacros.h> 36 #include <sys/sunddi.h> 37 #include <sys/sunndi.h> 38 #include <sys/ddi_impldefs.h> 39 #include <sys/open.h> 40 #include <sys/errno.h> 41 #include <sys/file.h> 42 #include <sys/policy.h> 43 #include <sys/hotplug/pci/pcihp.h> 44 #include "px_obj.h" 45 #include <sys/pci_tools.h> 46 #include "px_tools_ext.h" 47 #include "pcie_pwr.h" 48 49 /*LINTLIBRARY*/ 50 51 static int px_open(dev_t *devp, int flags, int otyp, cred_t *credp); 52 static int px_close(dev_t dev, int flags, int otyp, cred_t *credp); 53 static int px_ioctl(dev_t dev, int cmd, intptr_t arg, int mode, 54 cred_t *credp, int *rvalp); 55 static int px_prop_op(dev_t dev, dev_info_t *dip, ddi_prop_op_t prop_op, 56 int flags, char *name, caddr_t valuep, int *lengthp); 57 58 struct cb_ops px_cb_ops = { 59 px_open, /* open */ 60 px_close, /* close */ 61 nodev, /* strategy */ 62 nodev, /* print */ 63 nodev, /* dump */ 64 nodev, /* read */ 65 nodev, /* write */ 66 px_ioctl, /* ioctl */ 67 nodev, /* devmap */ 68 nodev, /* mmap */ 69 nodev, /* segmap */ 70 nochpoll, /* poll */ 71 px_prop_op, /* cb_prop_op */ 72 NULL, /* streamtab */ 73 D_NEW | D_MP | D_HOTPLUG, /* Driver compatibility flag */ 74 CB_REV, /* rev */ 75 nodev, /* int (*cb_aread)() */ 76 nodev /* int (*cb_awrite)() */ 77 }; 78 79 /* ARGSUSED3 */ 80 static int 81 px_open(dev_t *devp, int flags, int otyp, cred_t *credp) 82 { 83 px_t *px_p; 84 int rval; 85 uint_t orig_px_soft_state; 86 87 /* 88 * Make sure the open is for the right file type. 89 */ 90 if (otyp != OTYP_CHR) 91 return (EINVAL); 92 93 /* 94 * Get the soft state structure for the device. 95 */ 96 px_p = PX_DEV_TO_SOFTSTATE(*devp); 97 if (px_p == NULL) 98 return (ENXIO); 99 100 /* 101 * Handle the open by tracking the device state. 102 */ 103 DBG(DBG_OPEN, px_p->px_dip, "devp=%x: flags=%x\n", devp, flags); 104 mutex_enter(&px_p->px_mutex); 105 orig_px_soft_state = px_p->px_soft_state; 106 if (flags & FEXCL) { 107 if (px_p->px_soft_state != PX_SOFT_STATE_CLOSED) { 108 mutex_exit(&px_p->px_mutex); 109 DBG(DBG_OPEN, px_p->px_dip, "busy\n"); 110 return (EBUSY); 111 } 112 px_p->px_soft_state = PX_SOFT_STATE_OPEN_EXCL; 113 } else { 114 if (px_p->px_soft_state == PX_SOFT_STATE_OPEN_EXCL) { 115 mutex_exit(&px_p->px_mutex); 116 DBG(DBG_OPEN, px_p->px_dip, "busy\n"); 117 return (EBUSY); 118 } 119 px_p->px_soft_state = PX_SOFT_STATE_OPEN; 120 } 121 122 if (px_p->px_dev_caps & PX_HOTPLUG_CAPABLE) 123 if (rval = (pcihp_get_cb_ops())->cb_open(devp, flags, 124 otyp, credp)) { 125 px_p->px_soft_state = orig_px_soft_state; 126 mutex_exit(&px_p->px_mutex); 127 return (rval); 128 } 129 130 px_p->px_open_count++; 131 mutex_exit(&px_p->px_mutex); 132 return (0); 133 } 134 135 136 /* ARGSUSED */ 137 static int 138 px_close(dev_t dev, int flags, int otyp, cred_t *credp) 139 { 140 px_t *px_p; 141 int rval; 142 143 if (otyp != OTYP_CHR) 144 return (EINVAL); 145 146 px_p = PX_DEV_TO_SOFTSTATE(dev); 147 if (px_p == NULL) 148 return (ENXIO); 149 150 DBG(DBG_CLOSE, px_p->px_dip, "dev=%x: flags=%x\n", dev, flags); 151 mutex_enter(&px_p->px_mutex); 152 153 if (px_p->px_dev_caps & PX_HOTPLUG_CAPABLE) 154 if (rval = (pcihp_get_cb_ops())->cb_close(dev, flags, 155 otyp, credp)) { 156 mutex_exit(&px_p->px_mutex); 157 return (rval); 158 } 159 160 px_p->px_soft_state = PX_SOFT_STATE_CLOSED; 161 px_p->px_open_count = 0; 162 mutex_exit(&px_p->px_mutex); 163 return (0); 164 } 165 166 /* ARGSUSED */ 167 static int 168 px_ioctl(dev_t dev, int cmd, intptr_t arg, int mode, cred_t *credp, int *rvalp) 169 { 170 px_t *px_p; 171 dev_info_t *dip; 172 struct devctl_iocdata *dcp; 173 uint_t bus_state; 174 int rv = DDI_SUCCESS; 175 int minor = getminor(dev); 176 177 px_p = PX_DEV_TO_SOFTSTATE(dev); 178 if (px_p == NULL) 179 return (ENXIO); 180 181 dip = px_p->px_dip; 182 DBG(DBG_IOCTL, dip, "dev=%x: cmd=%x\n", dev, cmd); 183 184 #ifdef PX_DMA_TEST 185 if (IS_DMATEST(cmd)) { 186 *rvalp = px_dma_test(cmd, dip, px_p, arg); 187 return (0); 188 } 189 #endif /* PX_DMA_TEST */ 190 191 switch (PCIHP_AP_MINOR_NUM_TO_PCI_DEVNUM(minor)) { 192 193 /* 194 * PCI tools. 195 */ 196 case PCI_TOOL_REG_MINOR_NUM: 197 198 switch (cmd) { 199 case PCITOOL_DEVICE_SET_REG: 200 case PCITOOL_DEVICE_GET_REG: 201 202 /* Require full privileges. */ 203 if (secpolicy_kmdb(credp)) 204 rv = EPERM; 205 else 206 rv = pxtool_dev_reg_ops(dip, 207 (void *)arg, cmd, mode); 208 break; 209 210 case PCITOOL_NEXUS_SET_REG: 211 case PCITOOL_NEXUS_GET_REG: 212 213 /* Require full privileges. */ 214 if (secpolicy_kmdb(credp)) 215 rv = EPERM; 216 else 217 rv = pxtool_bus_reg_ops(dip, 218 (void *)arg, cmd, mode); 219 break; 220 221 default: 222 rv = ENOTTY; 223 } 224 return (rv); 225 226 case PCI_TOOL_INTR_MINOR_NUM: 227 228 switch (cmd) { 229 case PCITOOL_DEVICE_SET_INTR: 230 231 /* 232 * Require PRIV_SYS_RES_CONFIG, 233 * same as psradm 234 */ 235 if (secpolicy_ponline(credp)) { 236 rv = EPERM; 237 break; 238 } 239 240 /*FALLTHRU*/ 241 /* These require no special privileges. */ 242 case PCITOOL_DEVICE_GET_INTR: 243 case PCITOOL_SYSTEM_INTR_INFO: 244 rv = pxtool_intr(dip, (void *)arg, cmd, mode); 245 break; 246 247 default: 248 rv = ENOTTY; 249 } 250 return (rv); 251 252 default: 253 if (px_p->px_dev_caps & PX_HOTPLUG_CAPABLE) 254 return ((pcihp_get_cb_ops())->cb_ioctl(dev, cmd, 255 arg, mode, credp, rvalp)); 256 break; 257 } 258 259 if ((cmd & ~PPMREQ_MASK) == PPMREQ) { 260 261 /* Need privileges to use these ioctls. */ 262 if (drv_priv(credp)) { 263 DBG(DBG_TOOLS, dip, 264 "px_tools: Insufficient privileges\n"); 265 266 return (EPERM); 267 } 268 return (px_lib_pmctl(cmd, px_p)); 269 } 270 271 /* 272 * We can use the generic implementation for these ioctls 273 */ 274 switch (cmd) { 275 case DEVCTL_DEVICE_GETSTATE: 276 case DEVCTL_DEVICE_ONLINE: 277 case DEVCTL_DEVICE_OFFLINE: 278 case DEVCTL_BUS_GETSTATE: 279 return (ndi_devctl_ioctl(dip, cmd, arg, mode, 0)); 280 } 281 282 /* 283 * read devctl ioctl data 284 */ 285 if (ndi_dc_allochdl((void *)arg, &dcp) != NDI_SUCCESS) 286 return (EFAULT); 287 288 switch (cmd) { 289 290 case DEVCTL_DEVICE_RESET: 291 DBG(DBG_IOCTL, dip, "DEVCTL_DEVICE_RESET\n"); 292 rv = ENOTSUP; 293 break; 294 295 296 case DEVCTL_BUS_QUIESCE: 297 DBG(DBG_IOCTL, dip, "DEVCTL_BUS_QUIESCE\n"); 298 if (ndi_get_bus_state(dip, &bus_state) == NDI_SUCCESS) 299 if (bus_state == BUS_QUIESCED) 300 break; 301 (void) ndi_set_bus_state(dip, BUS_QUIESCED); 302 break; 303 304 case DEVCTL_BUS_UNQUIESCE: 305 DBG(DBG_IOCTL, dip, "DEVCTL_BUS_UNQUIESCE\n"); 306 if (ndi_get_bus_state(dip, &bus_state) == NDI_SUCCESS) 307 if (bus_state == BUS_ACTIVE) 308 break; 309 (void) ndi_set_bus_state(dip, BUS_ACTIVE); 310 break; 311 312 case DEVCTL_BUS_RESET: 313 DBG(DBG_IOCTL, dip, "DEVCTL_BUS_RESET\n"); 314 rv = ENOTSUP; 315 break; 316 317 case DEVCTL_BUS_RESETALL: 318 DBG(DBG_IOCTL, dip, "DEVCTL_BUS_RESETALL\n"); 319 rv = ENOTSUP; 320 break; 321 322 default: 323 rv = ENOTTY; 324 } 325 326 ndi_dc_freehdl(dcp); 327 return (rv); 328 } 329 330 static int px_prop_op(dev_t dev, dev_info_t *dip, ddi_prop_op_t prop_op, 331 int flags, char *name, caddr_t valuep, int *lengthp) 332 { 333 if (ddi_prop_exists(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, 334 "hotplug-capable")) 335 return ((pcihp_get_cb_ops())->cb_prop_op(dev, dip, 336 prop_op, flags, name, valuep, lengthp)); 337 338 return (ddi_prop_op(dev, dip, prop_op, flags, name, valuep, lengthp)); 339 } 340