2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (C) 2012-2014 Intel Corporation
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
35 #include <sys/module.h>
39 #include "nvme_private.h"
41 struct nvme_consumer {
43 nvme_cons_ns_fn_t ns_fn;
44 nvme_cons_ctrlr_fn_t ctrlr_fn;
45 nvme_cons_async_fn_t async_fn;
46 nvme_cons_fail_fn_t fail_fn;
49 struct nvme_consumer nvme_consumer[NVME_MAX_CONSUMERS];
50 #define INVALID_CONSUMER_ID 0xFFFF
52 uma_zone_t nvme_request_zone;
53 int32_t nvme_retry_count;
56 MALLOC_DEFINE(M_NVME, "nvme", "nvme(4) memory allocations");
58 devclass_t nvme_devclass;
65 nvme_request_zone = uma_zcreate("nvme_request",
66 sizeof(struct nvme_request), NULL, NULL, NULL, NULL, 0, 0);
68 for (i = 0; i < NVME_MAX_CONSUMERS; i++)
69 nvme_consumer[i].id = INVALID_CONSUMER_ID;
72 SYSINIT(nvme_register, SI_SUB_DRIVERS, SI_ORDER_SECOND, nvme_init, NULL);
77 uma_zdestroy(nvme_request_zone);
80 SYSUNINIT(nvme_unregister, SI_SUB_DRIVERS, SI_ORDER_SECOND, nvme_uninit, NULL);
83 nvme_shutdown(device_t dev)
85 struct nvme_controller *ctrlr;
87 ctrlr = DEVICE2SOFTC(dev);
88 nvme_ctrlr_shutdown(ctrlr);
94 nvme_dump_command(struct nvme_command *cmd)
98 "opc:%x f:%x cid:%x nsid:%x r2:%x r3:%x mptr:%jx prp1:%jx prp2:%jx cdw:%x %x %x %x %x %x\n",
99 cmd->opc, cmd->fuse, cmd->cid, le32toh(cmd->nsid),
100 cmd->rsvd2, cmd->rsvd3,
101 (uintmax_t)le64toh(cmd->mptr), (uintmax_t)le64toh(cmd->prp1), (uintmax_t)le64toh(cmd->prp2),
102 le32toh(cmd->cdw10), le32toh(cmd->cdw11), le32toh(cmd->cdw12),
103 le32toh(cmd->cdw13), le32toh(cmd->cdw14), le32toh(cmd->cdw15));
107 nvme_dump_completion(struct nvme_completion *cpl)
109 uint8_t p, sc, sct, m, dnr;
112 status = le16toh(cpl->status);
114 p = NVME_STATUS_GET_P(status);
115 sc = NVME_STATUS_GET_SC(status);
116 sct = NVME_STATUS_GET_SCT(status);
117 m = NVME_STATUS_GET_M(status);
118 dnr = NVME_STATUS_GET_DNR(status);
120 printf("cdw0:%08x sqhd:%04x sqid:%04x "
121 "cid:%04x p:%x sc:%02x sct:%x m:%x dnr:%x\n",
122 le32toh(cpl->cdw0), le16toh(cpl->sqhd), le16toh(cpl->sqid),
123 cpl->cid, p, sc, sct, m, dnr);
127 nvme_attach(device_t dev)
129 struct nvme_controller *ctrlr = DEVICE2SOFTC(dev);
132 status = nvme_ctrlr_construct(ctrlr, dev);
134 nvme_ctrlr_destruct(ctrlr, dev);
138 ctrlr->config_hook.ich_func = nvme_ctrlr_start_config_hook;
139 ctrlr->config_hook.ich_arg = ctrlr;
141 if (config_intrhook_establish(&ctrlr->config_hook) != 0)
148 nvme_detach (device_t dev)
150 struct nvme_controller *ctrlr = DEVICE2SOFTC(dev);
152 nvme_ctrlr_destruct(ctrlr, dev);
157 nvme_notify(struct nvme_consumer *cons,
158 struct nvme_controller *ctrlr)
160 struct nvme_namespace *ns;
165 * The consumer may register itself after the nvme devices
166 * have registered with the kernel, but before the
167 * driver has completed initialization. In that case,
168 * return here, and when initialization completes, the
169 * controller will make sure the consumer gets notified.
171 if (!ctrlr->is_initialized)
174 cmpset = atomic_cmpset_32(&ctrlr->notification_sent, 0, 1);
178 if (cons->ctrlr_fn != NULL)
179 ctrlr_cookie = (*cons->ctrlr_fn)(ctrlr);
181 ctrlr_cookie = (void *)(uintptr_t)0xdeadc0dedeadc0de;
182 ctrlr->cons_cookie[cons->id] = ctrlr_cookie;
184 /* ctrlr_fn has failed. Nothing to notify here any more. */
185 if (ctrlr_cookie == NULL)
188 if (ctrlr->is_failed) {
189 ctrlr->cons_cookie[cons->id] = NULL;
190 if (cons->fail_fn != NULL)
191 (*cons->fail_fn)(ctrlr_cookie);
193 * Do not notify consumers about the namespaces of a
198 for (ns_idx = 0; ns_idx < min(ctrlr->cdata.nn, NVME_MAX_NAMESPACES); ns_idx++) {
199 ns = &ctrlr->ns[ns_idx];
200 if (ns->data.nsze == 0)
202 if (cons->ns_fn != NULL)
203 ns->cons_cookie[cons->id] =
204 (*cons->ns_fn)(ns, ctrlr_cookie);
209 nvme_notify_new_controller(struct nvme_controller *ctrlr)
213 for (i = 0; i < NVME_MAX_CONSUMERS; i++) {
214 if (nvme_consumer[i].id != INVALID_CONSUMER_ID) {
215 nvme_notify(&nvme_consumer[i], ctrlr);
221 nvme_notify_new_consumer(struct nvme_consumer *cons)
224 struct nvme_controller *ctrlr;
225 int dev_idx, devcount;
227 if (devclass_get_devices(nvme_devclass, &devlist, &devcount))
230 for (dev_idx = 0; dev_idx < devcount; dev_idx++) {
231 ctrlr = DEVICE2SOFTC(devlist[dev_idx]);
232 nvme_notify(cons, ctrlr);
235 free(devlist, M_TEMP);
239 nvme_notify_async_consumers(struct nvme_controller *ctrlr,
240 const struct nvme_completion *async_cpl,
241 uint32_t log_page_id, void *log_page_buffer,
242 uint32_t log_page_size)
244 struct nvme_consumer *cons;
248 for (i = 0; i < NVME_MAX_CONSUMERS; i++) {
249 cons = &nvme_consumer[i];
250 if (cons->id != INVALID_CONSUMER_ID && cons->async_fn != NULL &&
251 (ctrlr_cookie = ctrlr->cons_cookie[i]) != NULL) {
252 (*cons->async_fn)(ctrlr_cookie, async_cpl,
253 log_page_id, log_page_buffer, log_page_size);
259 nvme_notify_fail_consumers(struct nvme_controller *ctrlr)
261 struct nvme_consumer *cons;
266 * This controller failed during initialization (i.e. IDENTIFY
267 * command failed or timed out). Do not notify any nvme
268 * consumers of the failure here, since the consumer does not
269 * even know about the controller yet.
271 if (!ctrlr->is_initialized)
274 for (i = 0; i < NVME_MAX_CONSUMERS; i++) {
275 cons = &nvme_consumer[i];
276 if (cons->id != INVALID_CONSUMER_ID &&
277 (ctrlr_cookie = ctrlr->cons_cookie[i]) != NULL) {
278 ctrlr->cons_cookie[i] = NULL;
279 if (cons->fail_fn != NULL)
280 cons->fail_fn(ctrlr_cookie);
286 nvme_notify_ns(struct nvme_controller *ctrlr, int nsid)
288 struct nvme_consumer *cons;
289 struct nvme_namespace *ns;
293 KASSERT(nsid <= NVME_MAX_NAMESPACES,
294 ("%s: Namespace notification to nsid %d exceeds range\n",
295 device_get_nameunit(ctrlr->dev), nsid));
297 if (!ctrlr->is_initialized)
300 ns = &ctrlr->ns[nsid - 1];
301 for (i = 0; i < NVME_MAX_CONSUMERS; i++) {
302 cons = &nvme_consumer[i];
303 if (cons->id != INVALID_CONSUMER_ID && cons->ns_fn != NULL &&
304 (ctrlr_cookie = ctrlr->cons_cookie[i]) != NULL)
305 ns->cons_cookie[i] = (*cons->ns_fn)(ns, ctrlr_cookie);
309 struct nvme_consumer *
310 nvme_register_consumer(nvme_cons_ns_fn_t ns_fn, nvme_cons_ctrlr_fn_t ctrlr_fn,
311 nvme_cons_async_fn_t async_fn,
312 nvme_cons_fail_fn_t fail_fn)
317 * TODO: add locking around consumer registration.
319 for (i = 0; i < NVME_MAX_CONSUMERS; i++)
320 if (nvme_consumer[i].id == INVALID_CONSUMER_ID) {
321 nvme_consumer[i].id = i;
322 nvme_consumer[i].ns_fn = ns_fn;
323 nvme_consumer[i].ctrlr_fn = ctrlr_fn;
324 nvme_consumer[i].async_fn = async_fn;
325 nvme_consumer[i].fail_fn = fail_fn;
327 nvme_notify_new_consumer(&nvme_consumer[i]);
328 return (&nvme_consumer[i]);
331 printf("nvme(4): consumer not registered - no slots available\n");
336 nvme_unregister_consumer(struct nvme_consumer *consumer)
339 consumer->id = INVALID_CONSUMER_ID;
343 nvme_completion_poll_cb(void *arg, const struct nvme_completion *cpl)
345 struct nvme_completion_poll_status *status = arg;
348 * Copy status into the argument passed by the caller, so that
349 * the caller can check the status to determine if the
350 * the request passed or failed.
352 memcpy(&status->cpl, cpl, sizeof(*cpl));
353 atomic_store_rel_int(&status->done, 1);
357 nvme_modevent(module_t mod __unused, int type __unused, void *argp __unused)
362 static moduledata_t nvme_mod = {
368 DECLARE_MODULE(nvme, nvme_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
369 MODULE_VERSION(nvme, 1);
370 MODULE_DEPEND(nvme, cam, 1, 1, 1);