2 * Copyright (C) 2012-2014 Intel Corporation
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
33 #include <sys/module.h>
37 #include <dev/pci/pcireg.h>
38 #include <dev/pci/pcivar.h>
40 #include "nvme_private.h"
42 struct nvme_consumer {
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;
50 struct nvme_consumer nvme_consumer[NVME_MAX_CONSUMERS];
51 #define INVALID_CONSUMER_ID 0xFFFF
53 uma_zone_t nvme_request_zone;
54 int32_t nvme_retry_count;
56 MALLOC_DEFINE(M_NVME, "nvme", "nvme(4) memory allocations");
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);
63 static devclass_t nvme_devclass;
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),
73 static driver_t nvme_pci_driver = {
76 sizeof(struct nvme_controller),
79 DRIVER_MODULE(nvme, pci, nvme_pci_driver, nvme_devclass, nvme_modevent, 0);
80 MODULE_VERSION(nvme, 1);
89 { 0x01118086, 0, 0, "NVMe Controller" },
90 { IDT32_PCI_ID, 0, 0, "IDT NVMe Controller (32 channel)" },
91 { IDT8_PCI_ID, 0, 0, "IDT NVMe Controller (8 channel)" },
92 { 0x09538086, 1, 0x3702, "DC P3700 SSD" },
93 { 0x09538086, 1, 0x3703, "DC P3700 SSD [2.5\" SFF]" },
94 { 0x09538086, 1, 0x3704, "DC P3500 SSD [Add-in Card]" },
95 { 0x09538086, 1, 0x3705, "DC P3500 SSD [2.5\" SFF]" },
96 { 0x09538086, 1, 0x3709, "DC P3600 SSD [Add-in Card]" },
97 { 0x09538086, 1, 0x370a, "DC P3600 SSD [2.5\" SFF]" },
98 { 0x00000000, 0, 0, NULL }
102 nvme_match(uint32_t devid, uint16_t subdevice, struct _pcsid *ep)
104 if (devid != ep->devid)
107 if (!ep->match_subdevice)
110 if (subdevice == ep->subdevice)
117 nvme_probe (device_t device)
123 devid = pci_get_devid(device);
124 subdevice = pci_get_subdevice(device);
128 if (nvme_match(devid, subdevice, ep))
134 device_set_desc(device, ep->desc);
135 return (BUS_PROBE_DEFAULT);
138 #if defined(PCIS_STORAGE_NVM)
139 if (pci_get_class(device) == PCIC_STORAGE &&
140 pci_get_subclass(device) == PCIS_STORAGE_NVM &&
141 pci_get_progif(device) == PCIP_STORAGE_NVM_ENTERPRISE_NVMHCI_1_0) {
142 device_set_desc(device, "Generic NVMe Device");
143 return (BUS_PROBE_GENERIC);
155 nvme_request_zone = uma_zcreate("nvme_request",
156 sizeof(struct nvme_request), NULL, NULL, NULL, NULL, 0, 0);
158 for (i = 0; i < NVME_MAX_CONSUMERS; i++)
159 nvme_consumer[i].id = INVALID_CONSUMER_ID;
162 SYSINIT(nvme_register, SI_SUB_DRIVERS, SI_ORDER_SECOND, nvme_init, NULL);
167 uma_zdestroy(nvme_request_zone);
170 SYSUNINIT(nvme_unregister, SI_SUB_DRIVERS, SI_ORDER_SECOND, nvme_uninit, NULL);
186 struct nvme_controller *ctrlr;
189 if (devclass_get_devices(nvme_devclass, &devlist, &devcount))
192 for (dev = 0; dev < devcount; dev++) {
193 ctrlr = DEVICE2SOFTC(devlist[dev]);
194 nvme_ctrlr_shutdown(ctrlr);
197 free(devlist, M_TEMP);
201 nvme_modevent(module_t mod, int type, void *arg)
222 nvme_dump_command(struct nvme_command *cmd)
225 "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",
226 cmd->opc, cmd->fuse, cmd->rsvd1, cmd->cid, cmd->nsid,
227 cmd->rsvd2, cmd->rsvd3,
228 (uintmax_t)cmd->mptr, (uintmax_t)cmd->prp1, (uintmax_t)cmd->prp2,
229 cmd->cdw10, cmd->cdw11, cmd->cdw12, cmd->cdw13, cmd->cdw14,
234 nvme_dump_completion(struct nvme_completion *cpl)
236 printf("cdw0:%08x sqhd:%04x sqid:%04x "
237 "cid:%04x p:%x sc:%02x sct:%x m:%x dnr:%x\n",
238 cpl->cdw0, cpl->sqhd, cpl->sqid,
239 cpl->cid, cpl->status.p, cpl->status.sc, cpl->status.sct,
240 cpl->status.m, cpl->status.dnr);
244 nvme_attach(device_t dev)
246 struct nvme_controller *ctrlr = DEVICE2SOFTC(dev);
249 status = nvme_ctrlr_construct(ctrlr, dev);
252 nvme_ctrlr_destruct(ctrlr, dev);
257 * Reset controller twice to ensure we do a transition from cc.en==1
258 * to cc.en==0. This is because we don't really know what status
259 * the controller was left in when boot handed off to OS.
261 status = nvme_ctrlr_hw_reset(ctrlr);
263 nvme_ctrlr_destruct(ctrlr, dev);
267 status = nvme_ctrlr_hw_reset(ctrlr);
269 nvme_ctrlr_destruct(ctrlr, dev);
273 nvme_sysctl_initialize_ctrlr(ctrlr);
275 pci_enable_busmaster(dev);
277 ctrlr->config_hook.ich_func = nvme_ctrlr_start_config_hook;
278 ctrlr->config_hook.ich_arg = ctrlr;
280 config_intrhook_establish(&ctrlr->config_hook);
286 nvme_detach (device_t dev)
288 struct nvme_controller *ctrlr = DEVICE2SOFTC(dev);
290 nvme_ctrlr_destruct(ctrlr, dev);
291 pci_disable_busmaster(dev);
296 nvme_notify(struct nvme_consumer *cons,
297 struct nvme_controller *ctrlr)
299 struct nvme_namespace *ns;
304 * The consumer may register itself after the nvme devices
305 * have registered with the kernel, but before the
306 * driver has completed initialization. In that case,
307 * return here, and when initialization completes, the
308 * controller will make sure the consumer gets notified.
310 if (!ctrlr->is_initialized)
313 cmpset = atomic_cmpset_32(&ctrlr->notification_sent, 0, 1);
318 if (cons->ctrlr_fn != NULL)
319 ctrlr_cookie = (*cons->ctrlr_fn)(ctrlr);
322 ctrlr->cons_cookie[cons->id] = ctrlr_cookie;
323 if (ctrlr->is_failed) {
324 if (cons->fail_fn != NULL)
325 (*cons->fail_fn)(ctrlr_cookie);
327 * Do not notify consumers about the namespaces of a
332 for (ns_idx = 0; ns_idx < ctrlr->cdata.nn; ns_idx++) {
333 ns = &ctrlr->ns[ns_idx];
334 if (cons->ns_fn != NULL)
335 ns->cons_cookie[cons->id] =
336 (*cons->ns_fn)(ns, ctrlr_cookie);
341 nvme_notify_new_controller(struct nvme_controller *ctrlr)
345 for (i = 0; i < NVME_MAX_CONSUMERS; i++) {
346 if (nvme_consumer[i].id != INVALID_CONSUMER_ID) {
347 nvme_notify(&nvme_consumer[i], ctrlr);
353 nvme_notify_new_consumer(struct nvme_consumer *cons)
356 struct nvme_controller *ctrlr;
357 int dev_idx, devcount;
359 if (devclass_get_devices(nvme_devclass, &devlist, &devcount))
362 for (dev_idx = 0; dev_idx < devcount; dev_idx++) {
363 ctrlr = DEVICE2SOFTC(devlist[dev_idx]);
364 nvme_notify(cons, ctrlr);
367 free(devlist, M_TEMP);
371 nvme_notify_async_consumers(struct nvme_controller *ctrlr,
372 const struct nvme_completion *async_cpl,
373 uint32_t log_page_id, void *log_page_buffer,
374 uint32_t log_page_size)
376 struct nvme_consumer *cons;
379 for (i = 0; i < NVME_MAX_CONSUMERS; i++) {
380 cons = &nvme_consumer[i];
381 if (cons->id != INVALID_CONSUMER_ID && cons->async_fn != NULL)
382 (*cons->async_fn)(ctrlr->cons_cookie[i], async_cpl,
383 log_page_id, log_page_buffer, log_page_size);
388 nvme_notify_fail_consumers(struct nvme_controller *ctrlr)
390 struct nvme_consumer *cons;
393 for (i = 0; i < NVME_MAX_CONSUMERS; i++) {
394 cons = &nvme_consumer[i];
395 if (cons->id != INVALID_CONSUMER_ID && cons->fail_fn != NULL)
396 cons->fail_fn(ctrlr->cons_cookie[i]);
400 struct nvme_consumer *
401 nvme_register_consumer(nvme_cons_ns_fn_t ns_fn, nvme_cons_ctrlr_fn_t ctrlr_fn,
402 nvme_cons_async_fn_t async_fn,
403 nvme_cons_fail_fn_t fail_fn)
408 * TODO: add locking around consumer registration. Not an issue
409 * right now since we only have one nvme consumer - nvd(4).
411 for (i = 0; i < NVME_MAX_CONSUMERS; i++)
412 if (nvme_consumer[i].id == INVALID_CONSUMER_ID) {
413 nvme_consumer[i].id = i;
414 nvme_consumer[i].ns_fn = ns_fn;
415 nvme_consumer[i].ctrlr_fn = ctrlr_fn;
416 nvme_consumer[i].async_fn = async_fn;
417 nvme_consumer[i].fail_fn = fail_fn;
419 nvme_notify_new_consumer(&nvme_consumer[i]);
420 return (&nvme_consumer[i]);
423 printf("nvme(4): consumer not registered - no slots available\n");
428 nvme_unregister_consumer(struct nvme_consumer *consumer)
431 consumer->id = INVALID_CONSUMER_ID;
435 nvme_completion_poll_cb(void *arg, const struct nvme_completion *cpl)
437 struct nvme_completion_poll_status *status = arg;
440 * Copy status into the argument passed by the caller, so that
441 * the caller can check the status to determine if the
442 * the request passed or failed.
444 memcpy(&status->cpl, cpl, sizeof(*cpl));