1 /*- 2 * Copyright (C) 2012-2014 Intel Corporation 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/bus.h> 32 #include <sys/conf.h> 33 #include <sys/module.h> 34 35 #include <vm/uma.h> 36 37 #include <dev/pci/pcireg.h> 38 #include <dev/pci/pcivar.h> 39 40 #include "nvme_private.h" 41 42 struct nvme_consumer { 43 uint32_t id; 44 nvme_cons_ns_fn_t ns_fn; 45 nvme_cons_ctrlr_fn_t ctrlr_fn; 46 nvme_cons_async_fn_t async_fn; 47 nvme_cons_fail_fn_t fail_fn; 48 }; 49 50 struct nvme_consumer nvme_consumer[NVME_MAX_CONSUMERS]; 51 #define INVALID_CONSUMER_ID 0xFFFF 52 53 uma_zone_t nvme_request_zone; 54 int32_t nvme_retry_count; 55 56 MALLOC_DEFINE(M_NVME, "nvme", "nvme(4) memory allocations"); 57 58 static int nvme_probe(device_t); 59 static int nvme_attach(device_t); 60 static int nvme_detach(device_t); 61 static int nvme_modevent(module_t mod, int type, void *arg); 62 63 static devclass_t nvme_devclass; 64 65 static device_method_t nvme_pci_methods[] = { 66 /* Device interface */ 67 DEVMETHOD(device_probe, nvme_probe), 68 DEVMETHOD(device_attach, nvme_attach), 69 DEVMETHOD(device_detach, nvme_detach), 70 { 0, 0 } 71 }; 72 73 static driver_t nvme_pci_driver = { 74 "nvme", 75 nvme_pci_methods, 76 sizeof(struct nvme_controller), 77 }; 78 79 DRIVER_MODULE(nvme, pci, nvme_pci_driver, nvme_devclass, nvme_modevent, 0); 80 MODULE_VERSION(nvme, 1); 81 82 static struct _pcsid 83 { 84 u_int32_t type; 85 const char *desc; 86 } pci_ids[] = { 87 { 0x01118086, "NVMe Controller" }, 88 { CHATHAM_PCI_ID, "Chatham Prototype NVMe Controller" }, 89 { IDT32_PCI_ID, "IDT NVMe Controller (32 channel)" }, 90 { IDT8_PCI_ID, "IDT NVMe Controller (8 channel)" }, 91 { 0x00000000, NULL } 92 }; 93 94 static int 95 nvme_probe (device_t device) 96 { 97 struct _pcsid *ep; 98 u_int32_t type; 99 100 type = pci_get_devid(device); 101 ep = pci_ids; 102 103 while (ep->type && ep->type != type) 104 ++ep; 105 106 if (ep->desc) { 107 device_set_desc(device, ep->desc); 108 return (BUS_PROBE_DEFAULT); 109 } 110 111 #if defined(PCIS_STORAGE_NVM) 112 if (pci_get_class(device) == PCIC_STORAGE && 113 pci_get_subclass(device) == PCIS_STORAGE_NVM && 114 pci_get_progif(device) == PCIP_STORAGE_NVM_ENTERPRISE_NVMHCI_1_0) { 115 device_set_desc(device, "Generic NVMe Device"); 116 return (BUS_PROBE_GENERIC); 117 } 118 #endif 119 120 return (ENXIO); 121 } 122 123 static void 124 nvme_init(void) 125 { 126 uint32_t i; 127 128 nvme_request_zone = uma_zcreate("nvme_request", 129 sizeof(struct nvme_request), NULL, NULL, NULL, NULL, 0, 0); 130 131 for (i = 0; i < NVME_MAX_CONSUMERS; i++) 132 nvme_consumer[i].id = INVALID_CONSUMER_ID; 133 } 134 135 SYSINIT(nvme_register, SI_SUB_DRIVERS, SI_ORDER_SECOND, nvme_init, NULL); 136 137 static void 138 nvme_uninit(void) 139 { 140 uma_zdestroy(nvme_request_zone); 141 } 142 143 SYSUNINIT(nvme_unregister, SI_SUB_DRIVERS, SI_ORDER_SECOND, nvme_uninit, NULL); 144 145 static void 146 nvme_load(void) 147 { 148 } 149 150 static void 151 nvme_unload(void) 152 { 153 } 154 155 static void 156 nvme_shutdown(void) 157 { 158 device_t *devlist; 159 struct nvme_controller *ctrlr; 160 int dev, devcount; 161 162 if (devclass_get_devices(nvme_devclass, &devlist, &devcount)) 163 return; 164 165 for (dev = 0; dev < devcount; dev++) { 166 ctrlr = DEVICE2SOFTC(devlist[dev]); 167 nvme_ctrlr_shutdown(ctrlr); 168 } 169 170 free(devlist, M_TEMP); 171 } 172 173 static int 174 nvme_modevent(module_t mod, int type, void *arg) 175 { 176 177 switch (type) { 178 case MOD_LOAD: 179 nvme_load(); 180 break; 181 case MOD_UNLOAD: 182 nvme_unload(); 183 break; 184 case MOD_SHUTDOWN: 185 nvme_shutdown(); 186 break; 187 default: 188 break; 189 } 190 191 return (0); 192 } 193 194 void 195 nvme_dump_command(struct nvme_command *cmd) 196 { 197 printf( 198 "opc:%x f:%x r1:%x cid:%x nsid:%x r2:%x r3:%x mptr:%jx prp1:%jx prp2:%jx cdw:%x %x %x %x %x %x\n", 199 cmd->opc, cmd->fuse, cmd->rsvd1, cmd->cid, cmd->nsid, 200 cmd->rsvd2, cmd->rsvd3, 201 (uintmax_t)cmd->mptr, (uintmax_t)cmd->prp1, (uintmax_t)cmd->prp2, 202 cmd->cdw10, cmd->cdw11, cmd->cdw12, cmd->cdw13, cmd->cdw14, 203 cmd->cdw15); 204 } 205 206 void 207 nvme_dump_completion(struct nvme_completion *cpl) 208 { 209 printf("cdw0:%08x sqhd:%04x sqid:%04x " 210 "cid:%04x p:%x sc:%02x sct:%x m:%x dnr:%x\n", 211 cpl->cdw0, cpl->sqhd, cpl->sqid, 212 cpl->cid, cpl->status.p, cpl->status.sc, cpl->status.sct, 213 cpl->status.m, cpl->status.dnr); 214 } 215 216 static int 217 nvme_attach(device_t dev) 218 { 219 struct nvme_controller *ctrlr = DEVICE2SOFTC(dev); 220 int status; 221 222 status = nvme_ctrlr_construct(ctrlr, dev); 223 224 if (status != 0) { 225 nvme_ctrlr_destruct(ctrlr, dev); 226 return (status); 227 } 228 229 /* 230 * Reset controller twice to ensure we do a transition from cc.en==1 231 * to cc.en==0. This is because we don't really know what status 232 * the controller was left in when boot handed off to OS. 233 */ 234 status = nvme_ctrlr_hw_reset(ctrlr); 235 if (status != 0) { 236 nvme_ctrlr_destruct(ctrlr, dev); 237 return (status); 238 } 239 240 status = nvme_ctrlr_hw_reset(ctrlr); 241 if (status != 0) { 242 nvme_ctrlr_destruct(ctrlr, dev); 243 return (status); 244 } 245 246 nvme_sysctl_initialize_ctrlr(ctrlr); 247 248 pci_enable_busmaster(dev); 249 250 ctrlr->config_hook.ich_func = nvme_ctrlr_start_config_hook; 251 ctrlr->config_hook.ich_arg = ctrlr; 252 253 config_intrhook_establish(&ctrlr->config_hook); 254 255 return (0); 256 } 257 258 static int 259 nvme_detach (device_t dev) 260 { 261 struct nvme_controller *ctrlr = DEVICE2SOFTC(dev); 262 263 nvme_ctrlr_destruct(ctrlr, dev); 264 pci_disable_busmaster(dev); 265 return (0); 266 } 267 268 static void 269 nvme_notify(struct nvme_consumer *cons, 270 struct nvme_controller *ctrlr) 271 { 272 struct nvme_namespace *ns; 273 void *ctrlr_cookie; 274 int cmpset, ns_idx; 275 276 /* 277 * The consumer may register itself after the nvme devices 278 * have registered with the kernel, but before the 279 * driver has completed initialization. In that case, 280 * return here, and when initialization completes, the 281 * controller will make sure the consumer gets notified. 282 */ 283 if (!ctrlr->is_initialized) 284 return; 285 286 cmpset = atomic_cmpset_32(&ctrlr->notification_sent, 0, 1); 287 288 if (cmpset == 0) 289 return; 290 291 if (cons->ctrlr_fn != NULL) 292 ctrlr_cookie = (*cons->ctrlr_fn)(ctrlr); 293 else 294 ctrlr_cookie = NULL; 295 ctrlr->cons_cookie[cons->id] = ctrlr_cookie; 296 if (ctrlr->is_failed) { 297 if (cons->fail_fn != NULL) 298 (*cons->fail_fn)(ctrlr_cookie); 299 /* 300 * Do not notify consumers about the namespaces of a 301 * failed controller. 302 */ 303 return; 304 } 305 for (ns_idx = 0; ns_idx < ctrlr->cdata.nn; ns_idx++) { 306 ns = &ctrlr->ns[ns_idx]; 307 if (cons->ns_fn != NULL) 308 ns->cons_cookie[cons->id] = 309 (*cons->ns_fn)(ns, ctrlr_cookie); 310 } 311 } 312 313 void 314 nvme_notify_new_controller(struct nvme_controller *ctrlr) 315 { 316 int i; 317 318 for (i = 0; i < NVME_MAX_CONSUMERS; i++) { 319 if (nvme_consumer[i].id != INVALID_CONSUMER_ID) { 320 nvme_notify(&nvme_consumer[i], ctrlr); 321 } 322 } 323 } 324 325 static void 326 nvme_notify_new_consumer(struct nvme_consumer *cons) 327 { 328 device_t *devlist; 329 struct nvme_controller *ctrlr; 330 int dev_idx, devcount; 331 332 if (devclass_get_devices(nvme_devclass, &devlist, &devcount)) 333 return; 334 335 for (dev_idx = 0; dev_idx < devcount; dev_idx++) { 336 ctrlr = DEVICE2SOFTC(devlist[dev_idx]); 337 nvme_notify(cons, ctrlr); 338 } 339 340 free(devlist, M_TEMP); 341 } 342 343 void 344 nvme_notify_async_consumers(struct nvme_controller *ctrlr, 345 const struct nvme_completion *async_cpl, 346 uint32_t log_page_id, void *log_page_buffer, 347 uint32_t log_page_size) 348 { 349 struct nvme_consumer *cons; 350 uint32_t i; 351 352 for (i = 0; i < NVME_MAX_CONSUMERS; i++) { 353 cons = &nvme_consumer[i]; 354 if (cons->id != INVALID_CONSUMER_ID && cons->async_fn != NULL) 355 (*cons->async_fn)(ctrlr->cons_cookie[i], async_cpl, 356 log_page_id, log_page_buffer, log_page_size); 357 } 358 } 359 360 void 361 nvme_notify_fail_consumers(struct nvme_controller *ctrlr) 362 { 363 struct nvme_consumer *cons; 364 uint32_t i; 365 366 for (i = 0; i < NVME_MAX_CONSUMERS; i++) { 367 cons = &nvme_consumer[i]; 368 if (cons->id != INVALID_CONSUMER_ID && cons->fail_fn != NULL) 369 cons->fail_fn(ctrlr->cons_cookie[i]); 370 } 371 } 372 373 struct nvme_consumer * 374 nvme_register_consumer(nvme_cons_ns_fn_t ns_fn, nvme_cons_ctrlr_fn_t ctrlr_fn, 375 nvme_cons_async_fn_t async_fn, 376 nvme_cons_fail_fn_t fail_fn) 377 { 378 int i; 379 380 /* 381 * TODO: add locking around consumer registration. Not an issue 382 * right now since we only have one nvme consumer - nvd(4). 383 */ 384 for (i = 0; i < NVME_MAX_CONSUMERS; i++) 385 if (nvme_consumer[i].id == INVALID_CONSUMER_ID) { 386 nvme_consumer[i].id = i; 387 nvme_consumer[i].ns_fn = ns_fn; 388 nvme_consumer[i].ctrlr_fn = ctrlr_fn; 389 nvme_consumer[i].async_fn = async_fn; 390 nvme_consumer[i].fail_fn = fail_fn; 391 392 nvme_notify_new_consumer(&nvme_consumer[i]); 393 return (&nvme_consumer[i]); 394 } 395 396 printf("nvme(4): consumer not registered - no slots available\n"); 397 return (NULL); 398 } 399 400 void 401 nvme_unregister_consumer(struct nvme_consumer *consumer) 402 { 403 404 consumer->id = INVALID_CONSUMER_ID; 405 } 406 407 void 408 nvme_completion_poll_cb(void *arg, const struct nvme_completion *cpl) 409 { 410 struct nvme_completion_poll_status *status = arg; 411 412 /* 413 * Copy status into the argument passed by the caller, so that 414 * the caller can check the status to determine if the 415 * the request passed or failed. 416 */ 417 memcpy(&status->cpl, cpl, sizeof(*cpl)); 418 wmb(); 419 status->done = TRUE; 420 } 421