2 * Copyright (C) 2012 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>
35 #include <sys/fcntl.h>
36 #include <sys/ioccom.h>
37 #include <sys/module.h>
40 #include <dev/pci/pcivar.h>
42 #include "nvme_private.h"
45 nvme_ns_cb(void *arg, const struct nvme_completion *status)
47 struct nvme_completion *cpl = arg;
51 * Copy status into the argument passed by the caller, so that
52 * the caller can check the status to determine if the
53 * the request passed or failed.
55 memcpy(cpl, status, sizeof(*cpl));
56 mtx = mtx_pool_find(mtxpool_sleep, cpl);
63 nvme_ns_ioctl(struct cdev *cdev, u_long cmd, caddr_t arg, int flag,
66 struct nvme_namespace *ns;
67 struct nvme_controller *ctrlr;
68 struct nvme_completion cpl;
75 case NVME_IDENTIFY_NAMESPACE:
78 * Don't refresh data on Chatham, since Chatham returns
79 * garbage on IDENTIFY anyways.
81 if (pci_get_devid(ctrlr->dev) == CHATHAM_PCI_ID) {
82 memcpy(arg, &ns->data, sizeof(ns->data));
86 /* Refresh data before returning to user. */
87 mtx = mtx_pool_find(mtxpool_sleep, &cpl);
89 nvme_ctrlr_cmd_identify_namespace(ctrlr, ns->id, &ns->data,
91 msleep(&cpl, mtx, PRIBIO, "nvme_ioctl", 0);
93 if (cpl.sf_sc || cpl.sf_sct)
95 memcpy(arg, &ns->data, sizeof(ns->data));
99 nvme_ns_test(ns, cmd, arg);
102 *(off_t *)arg = (off_t)nvme_ns_get_size(ns);
104 case DIOCGSECTORSIZE:
105 *(u_int *)arg = nvme_ns_get_sector_size(ns);
115 nvme_ns_open(struct cdev *dev __unused, int flags, int fmt __unused,
121 error = securelevel_gt(td->td_ucred, 0);
127 nvme_ns_close(struct cdev *dev __unused, int flags, int fmt __unused,
135 nvme_ns_strategy_done(void *arg, const struct nvme_completion *status)
137 struct bio *bp = arg;
140 * TODO: add more extensive translation of NVMe status codes
141 * to different bio error codes (i.e. EIO, EINVAL, etc.)
143 if (status->sf_sc || status->sf_sct) {
145 bp->bio_flags |= BIO_ERROR;
146 bp->bio_resid = bp->bio_bcount;
154 nvme_ns_strategy(struct bio *bp)
156 struct nvme_namespace *ns;
159 ns = bp->bio_dev->si_drv1;
160 err = nvme_ns_bio_process(ns, bp, nvme_ns_strategy_done);
164 bp->bio_flags |= BIO_ERROR;
165 bp->bio_resid = bp->bio_bcount;
171 static struct cdevsw nvme_ns_cdevsw = {
172 .d_version = D_VERSION,
174 .d_open = nvme_ns_open,
175 .d_close = nvme_ns_close,
176 .d_read = nvme_ns_physio,
177 .d_write = nvme_ns_physio,
178 .d_strategy = nvme_ns_strategy,
179 .d_ioctl = nvme_ns_ioctl
183 nvme_ns_get_max_io_xfer_size(struct nvme_namespace *ns)
185 return ns->ctrlr->max_xfer_size;
189 nvme_ns_get_sector_size(struct nvme_namespace *ns)
191 return (1 << ns->data.lbaf[0].lbads);
195 nvme_ns_get_num_sectors(struct nvme_namespace *ns)
197 return (ns->data.nsze);
201 nvme_ns_get_size(struct nvme_namespace *ns)
203 return (nvme_ns_get_num_sectors(ns) * nvme_ns_get_sector_size(ns));
207 nvme_ns_get_flags(struct nvme_namespace *ns)
213 nvme_ns_get_serial_number(struct nvme_namespace *ns)
215 return ((const char *)ns->ctrlr->cdata.sn);
219 nvme_ns_get_model_number(struct nvme_namespace *ns)
221 return ((const char *)ns->ctrlr->cdata.mn);
224 const struct nvme_namespace_data *
225 nvme_ns_get_data(struct nvme_namespace *ns)
232 nvme_ns_bio_done(void *arg, const struct nvme_completion *status)
234 struct bio *bp = arg;
235 nvme_cb_fn_t bp_cb_fn;
237 bp_cb_fn = bp->bio_driver1;
240 free(bp->bio_driver2, M_NVME);
242 bp_cb_fn(bp, status);
246 nvme_ns_bio_process(struct nvme_namespace *ns, struct bio *bp,
249 struct nvme_dsm_range *dsm_range;
252 bp->bio_driver1 = cb_fn;
254 switch (bp->bio_cmd) {
256 err = nvme_ns_cmd_read(ns, bp->bio_data,
257 bp->bio_offset/nvme_ns_get_sector_size(ns),
258 bp->bio_bcount/nvme_ns_get_sector_size(ns),
259 nvme_ns_bio_done, bp);
262 err = nvme_ns_cmd_write(ns, bp->bio_data,
263 bp->bio_offset/nvme_ns_get_sector_size(ns),
264 bp->bio_bcount/nvme_ns_get_sector_size(ns),
265 nvme_ns_bio_done, bp);
268 err = nvme_ns_cmd_flush(ns, nvme_ns_bio_done, bp);
272 * Note: Chatham2 doesn't support DSM, so this code
273 * can't be fully tested yet.
276 malloc(sizeof(struct nvme_dsm_range), M_NVME,
279 bp->bio_bcount/nvme_ns_get_sector_size(ns);
280 dsm_range->starting_lba =
281 bp->bio_offset/nvme_ns_get_sector_size(ns);
282 bp->bio_driver2 = dsm_range;
283 err = nvme_ns_cmd_deallocate(ns, dsm_range, 1,
284 nvme_ns_bio_done, bp);
286 free(dsm_range, M_NVME);
298 nvme_ns_populate_chatham_data(struct nvme_namespace *ns)
300 struct nvme_controller *ctrlr;
301 struct nvme_namespace_data *nsdata;
306 nsdata->nsze = ctrlr->chatham_lbas;
307 nsdata->ncap = ctrlr->chatham_lbas;
308 nsdata->nuse = ctrlr->chatham_lbas;
310 /* Chatham2 doesn't support thin provisioning. */
311 nsdata->nsfeat.thin_prov = 0;
313 /* Set LBA size to 512 bytes. */
314 nsdata->lbaf[0].lbads = 9;
316 #endif /* CHATHAM2 */
319 nvme_ns_construct(struct nvme_namespace *ns, uint16_t id,
320 struct nvme_controller *ctrlr)
322 struct nvme_completion cpl;
330 if (pci_get_devid(ctrlr->dev) == CHATHAM_PCI_ID)
331 nvme_ns_populate_chatham_data(ns);
334 mtx = mtx_pool_find(mtxpool_sleep, &cpl);
337 nvme_ctrlr_cmd_identify_namespace(ctrlr, id, &ns->data,
339 status = msleep(&cpl, mtx, PRIBIO, "nvme_start", hz*5);
341 if ((status != 0) || cpl.sf_sc || cpl.sf_sct) {
342 printf("nvme_identify_namespace failed!\n");
349 if (ctrlr->cdata.oncs.dsm)
350 ns->flags |= NVME_NS_DEALLOCATE_SUPPORTED;
352 if (ctrlr->cdata.vwc.present)
353 ns->flags |= NVME_NS_FLUSH_SUPPORTED;
356 * cdev may have already been created, if we are reconstructing the
357 * namespace after a controller-level reset.
359 if (ns->cdev != NULL)
363 * MAKEDEV_ETERNAL was added in r210923, for cdevs that will never
364 * be destroyed. This avoids refcounting on the cdev object.
365 * That should be OK case here, as long as we're not supporting PCIe
366 * surprise removal nor namespace deletion.
368 #ifdef MAKEDEV_ETERNAL_KLD
369 ns->cdev = make_dev_credf(MAKEDEV_ETERNAL_KLD, &nvme_ns_cdevsw, 0,
370 NULL, UID_ROOT, GID_WHEEL, 0600, "nvme%dns%d",
371 device_get_unit(ctrlr->dev), ns->id);
373 ns->cdev = make_dev_credf(0, &nvme_ns_cdevsw, 0,
374 NULL, UID_ROOT, GID_WHEEL, 0600, "nvme%dns%d",
375 device_get_unit(ctrlr->dev), ns->id);
378 if (ns->cdev != NULL)
379 ns->cdev->si_drv1 = ns;
384 void nvme_ns_destruct(struct nvme_namespace *ns)
387 if (ns->cdev != NULL)
388 destroy_dev(ns->cdev);