2 * Copyright (C) 2015 IT University of Copenhagen. All rights reserved.
3 * Initial release: Matias Bjorling <m@bjorling.me>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License version
7 * 2 as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; see the file COPYING. If not, write to
16 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
21 #include <linux/list.h>
22 #include <linux/types.h>
23 #include <linux/sem.h>
24 #include <linux/bitmap.h>
25 #include <linux/module.h>
26 #include <linux/miscdevice.h>
27 #include <linux/lightnvm.h>
28 #include <linux/sched/sysctl.h>
30 static LIST_HEAD(nvm_tgt_types);
31 static DECLARE_RWSEM(nvm_tgtt_lock);
32 static LIST_HEAD(nvm_mgrs);
33 static LIST_HEAD(nvm_devices);
34 static DECLARE_RWSEM(nvm_lock);
36 struct nvm_tgt_type *nvm_find_target_type(const char *name, int lock)
38 struct nvm_tgt_type *tmp, *tt = NULL;
41 down_write(&nvm_tgtt_lock);
43 list_for_each_entry(tmp, &nvm_tgt_types, list)
44 if (!strcmp(name, tmp->name)) {
50 up_write(&nvm_tgtt_lock);
53 EXPORT_SYMBOL(nvm_find_target_type);
55 int nvm_register_tgt_type(struct nvm_tgt_type *tt)
59 down_write(&nvm_tgtt_lock);
60 if (nvm_find_target_type(tt->name, 0))
63 list_add(&tt->list, &nvm_tgt_types);
64 up_write(&nvm_tgtt_lock);
68 EXPORT_SYMBOL(nvm_register_tgt_type);
70 void nvm_unregister_tgt_type(struct nvm_tgt_type *tt)
75 down_write(&nvm_lock);
79 EXPORT_SYMBOL(nvm_unregister_tgt_type);
81 void *nvm_dev_dma_alloc(struct nvm_dev *dev, gfp_t mem_flags,
82 dma_addr_t *dma_handler)
84 return dev->ops->dev_dma_alloc(dev, dev->dma_pool, mem_flags,
87 EXPORT_SYMBOL(nvm_dev_dma_alloc);
89 void nvm_dev_dma_free(struct nvm_dev *dev, void *addr,
90 dma_addr_t dma_handler)
92 dev->ops->dev_dma_free(dev->dma_pool, addr, dma_handler);
94 EXPORT_SYMBOL(nvm_dev_dma_free);
96 static struct nvmm_type *nvm_find_mgr_type(const char *name)
100 list_for_each_entry(mt, &nvm_mgrs, list)
101 if (!strcmp(name, mt->name))
107 static struct nvmm_type *nvm_init_mgr(struct nvm_dev *dev)
109 struct nvmm_type *mt;
112 lockdep_assert_held(&nvm_lock);
114 list_for_each_entry(mt, &nvm_mgrs, list) {
115 if (strncmp(dev->sb.mmtype, mt->name, NVM_MMTYPE_LEN))
118 ret = mt->register_mgr(dev);
120 pr_err("nvm: media mgr failed to init (%d) on dev %s\n",
122 return NULL; /* initialization failed */
130 int nvm_register_mgr(struct nvmm_type *mt)
135 down_write(&nvm_lock);
136 if (nvm_find_mgr_type(mt->name)) {
140 list_add(&mt->list, &nvm_mgrs);
143 /* try to register media mgr if any device have none configured */
144 list_for_each_entry(dev, &nvm_devices, devices) {
148 dev->mt = nvm_init_mgr(dev);
155 EXPORT_SYMBOL(nvm_register_mgr);
157 void nvm_unregister_mgr(struct nvmm_type *mt)
162 down_write(&nvm_lock);
166 EXPORT_SYMBOL(nvm_unregister_mgr);
168 static struct nvm_dev *nvm_find_nvm_dev(const char *name)
172 list_for_each_entry(dev, &nvm_devices, devices)
173 if (!strcmp(name, dev->name))
179 struct nvm_block *nvm_get_blk(struct nvm_dev *dev, struct nvm_lun *lun,
182 return dev->mt->get_blk(dev, lun, flags);
184 EXPORT_SYMBOL(nvm_get_blk);
186 /* Assumes that all valid pages have already been moved on release to bm */
187 void nvm_put_blk(struct nvm_dev *dev, struct nvm_block *blk)
189 return dev->mt->put_blk(dev, blk);
191 EXPORT_SYMBOL(nvm_put_blk);
193 void nvm_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type)
195 return dev->mt->mark_blk(dev, ppa, type);
197 EXPORT_SYMBOL(nvm_mark_blk);
199 int nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
201 return dev->mt->submit_io(dev, rqd);
203 EXPORT_SYMBOL(nvm_submit_io);
205 int nvm_erase_blk(struct nvm_dev *dev, struct nvm_block *blk)
207 return dev->mt->erase_blk(dev, blk, 0);
209 EXPORT_SYMBOL(nvm_erase_blk);
211 void nvm_addr_to_generic_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
215 if (rqd->nr_ppas > 1) {
216 for (i = 0; i < rqd->nr_ppas; i++)
217 rqd->ppa_list[i] = dev_to_generic_addr(dev,
220 rqd->ppa_addr = dev_to_generic_addr(dev, rqd->ppa_addr);
223 EXPORT_SYMBOL(nvm_addr_to_generic_mode);
225 void nvm_generic_to_addr_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
229 if (rqd->nr_ppas > 1) {
230 for (i = 0; i < rqd->nr_ppas; i++)
231 rqd->ppa_list[i] = generic_to_dev_addr(dev,
234 rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr);
237 EXPORT_SYMBOL(nvm_generic_to_addr_mode);
239 int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd,
240 const struct ppa_addr *ppas, int nr_ppas, int vblk)
242 int i, plane_cnt, pl_idx;
245 if ((!vblk || dev->plane_mode == NVM_PLANE_SINGLE) && nr_ppas == 1) {
246 rqd->nr_ppas = nr_ppas;
247 rqd->ppa_addr = ppas[0];
252 rqd->nr_ppas = nr_ppas;
253 rqd->ppa_list = nvm_dev_dma_alloc(dev, GFP_KERNEL, &rqd->dma_ppa_list);
254 if (!rqd->ppa_list) {
255 pr_err("nvm: failed to allocate dma memory\n");
260 for (i = 0; i < nr_ppas; i++)
261 rqd->ppa_list[i] = ppas[i];
263 plane_cnt = dev->plane_mode;
264 rqd->nr_ppas *= plane_cnt;
266 for (i = 0; i < nr_ppas; i++) {
267 for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) {
270 rqd->ppa_list[(pl_idx * nr_ppas) + i] = ppa;
277 EXPORT_SYMBOL(nvm_set_rqd_ppalist);
279 void nvm_free_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd)
284 nvm_dev_dma_free(dev, rqd->ppa_list, rqd->dma_ppa_list);
286 EXPORT_SYMBOL(nvm_free_rqd_ppalist);
288 int nvm_erase_ppa(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas)
293 if (!dev->ops->erase_block)
296 memset(&rqd, 0, sizeof(struct nvm_rq));
298 ret = nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas, 1);
302 nvm_generic_to_addr_mode(dev, &rqd);
304 ret = dev->ops->erase_block(dev, &rqd);
306 nvm_free_rqd_ppalist(dev, &rqd);
310 EXPORT_SYMBOL(nvm_erase_ppa);
312 void nvm_end_io(struct nvm_rq *rqd, int error)
317 EXPORT_SYMBOL(nvm_end_io);
319 static void nvm_end_io_sync(struct nvm_rq *rqd)
321 struct completion *waiting = rqd->wait;
328 static int __nvm_submit_ppa(struct nvm_dev *dev, struct nvm_rq *rqd, int opcode,
329 int flags, void *buf, int len)
331 DECLARE_COMPLETION_ONSTACK(wait);
334 unsigned long hang_check;
336 bio = bio_map_kern(dev->q, buf, len, GFP_KERNEL);
337 if (IS_ERR_OR_NULL(bio))
340 nvm_generic_to_addr_mode(dev, rqd);
343 rqd->opcode = opcode;
347 rqd->end_io = nvm_end_io_sync;
349 ret = dev->ops->submit_io(dev, rqd);
355 /* Prevent hang_check timer from firing at us during very long I/O */
356 hang_check = sysctl_hung_task_timeout_secs;
358 while (!wait_for_completion_io_timeout(&wait,
359 hang_check * (HZ/2)))
362 wait_for_completion_io(&wait);
368 * nvm_submit_ppa_list - submit user-defined ppa list to device. The user must
369 * take to free ppa list if necessary.
371 * @ppa_list: user created ppa_list
372 * @nr_ppas: length of ppa_list
373 * @opcode: device opcode
374 * @flags: device flags
376 * @len: data buffer length
378 int nvm_submit_ppa_list(struct nvm_dev *dev, struct ppa_addr *ppa_list,
379 int nr_ppas, int opcode, int flags, void *buf, int len)
383 if (dev->ops->max_phys_sect < nr_ppas)
386 memset(&rqd, 0, sizeof(struct nvm_rq));
388 rqd.nr_ppas = nr_ppas;
390 rqd.ppa_list = ppa_list;
392 rqd.ppa_addr = ppa_list[0];
394 return __nvm_submit_ppa(dev, &rqd, opcode, flags, buf, len);
396 EXPORT_SYMBOL(nvm_submit_ppa_list);
399 * nvm_submit_ppa - submit PPAs to device. PPAs will automatically be unfolded
400 * as single, dual, quad plane PPAs depending on device type.
402 * @ppa: user created ppa_list
403 * @nr_ppas: length of ppa_list
404 * @opcode: device opcode
405 * @flags: device flags
407 * @len: data buffer length
409 int nvm_submit_ppa(struct nvm_dev *dev, struct ppa_addr *ppa, int nr_ppas,
410 int opcode, int flags, void *buf, int len)
415 memset(&rqd, 0, sizeof(struct nvm_rq));
416 ret = nvm_set_rqd_ppalist(dev, &rqd, ppa, nr_ppas, 1);
420 ret = __nvm_submit_ppa(dev, &rqd, opcode, flags, buf, len);
422 nvm_free_rqd_ppalist(dev, &rqd);
426 EXPORT_SYMBOL(nvm_submit_ppa);
429 * folds a bad block list from its plane representation to its virtual
430 * block representation. The fold is done in place and reduced size is
433 * If any of the planes status are bad or grown bad block, the virtual block
434 * is marked bad. If not bad, the first plane state acts as the block state.
436 int nvm_bb_tbl_fold(struct nvm_dev *dev, u8 *blks, int nr_blks)
438 int blk, offset, pl, blktype;
440 if (nr_blks != dev->blks_per_lun * dev->plane_mode)
443 for (blk = 0; blk < dev->blks_per_lun; blk++) {
444 offset = blk * dev->plane_mode;
445 blktype = blks[offset];
447 /* Bad blocks on any planes take precedence over other types */
448 for (pl = 0; pl < dev->plane_mode; pl++) {
449 if (blks[offset + pl] &
450 (NVM_BLK_T_BAD|NVM_BLK_T_GRWN_BAD)) {
451 blktype = blks[offset + pl];
459 return dev->blks_per_lun;
461 EXPORT_SYMBOL(nvm_bb_tbl_fold);
463 int nvm_get_bb_tbl(struct nvm_dev *dev, struct ppa_addr ppa, u8 *blks)
465 ppa = generic_to_dev_addr(dev, ppa);
467 return dev->ops->get_bb_tbl(dev, ppa, blks);
469 EXPORT_SYMBOL(nvm_get_bb_tbl);
471 static int nvm_init_slc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp)
475 dev->lps_per_blk = dev->pgs_per_blk;
476 dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL);
480 /* Just a linear array */
481 for (i = 0; i < dev->lps_per_blk; i++)
487 static int nvm_init_mlc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp)
490 struct nvm_id_lp_mlc *mlc = &grp->lptbl.mlc;
495 dev->lps_per_blk = mlc->num_pairs;
496 dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL);
500 /* The lower page table encoding consists of a list of bytes, where each
501 * has a lower and an upper half. The first half byte maintains the
502 * increment value and every value after is an offset added to the
503 * previous incrementation value
505 dev->lptbl[0] = mlc->pairs[0] & 0xF;
506 for (i = 1; i < dev->lps_per_blk; i++) {
507 p = mlc->pairs[i >> 1];
508 if (i & 0x1) /* upper */
509 dev->lptbl[i] = dev->lptbl[i - 1] + ((p & 0xF0) >> 4);
511 dev->lptbl[i] = dev->lptbl[i - 1] + (p & 0xF);
517 static int nvm_core_init(struct nvm_dev *dev)
519 struct nvm_id *id = &dev->identity;
520 struct nvm_id_group *grp = &id->groups[0];
524 dev->nr_chnls = grp->num_ch;
525 dev->luns_per_chnl = grp->num_lun;
526 dev->pgs_per_blk = grp->num_pg;
527 dev->blks_per_lun = grp->num_blk;
528 dev->nr_planes = grp->num_pln;
529 dev->fpg_size = grp->fpg_sz;
530 dev->pfpg_size = grp->fpg_sz * grp->num_pln;
531 dev->sec_size = grp->csecs;
532 dev->oob_size = grp->sos;
533 dev->sec_per_pg = grp->fpg_sz / grp->csecs;
534 dev->mccap = grp->mccap;
535 memcpy(&dev->ppaf, &id->ppaf, sizeof(struct nvm_addr_format));
537 dev->plane_mode = NVM_PLANE_SINGLE;
538 dev->max_rq_size = dev->ops->max_phys_sect * dev->sec_size;
540 if (grp->mpos & 0x020202)
541 dev->plane_mode = NVM_PLANE_DOUBLE;
542 if (grp->mpos & 0x040404)
543 dev->plane_mode = NVM_PLANE_QUAD;
545 if (grp->mtype != 0) {
546 pr_err("nvm: memory type not supported\n");
550 /* calculated values */
551 dev->sec_per_pl = dev->sec_per_pg * dev->nr_planes;
552 dev->sec_per_blk = dev->sec_per_pl * dev->pgs_per_blk;
553 dev->sec_per_lun = dev->sec_per_blk * dev->blks_per_lun;
554 dev->nr_luns = dev->luns_per_chnl * dev->nr_chnls;
556 dev->total_secs = dev->nr_luns * dev->sec_per_lun;
557 dev->lun_map = kcalloc(BITS_TO_LONGS(dev->nr_luns),
558 sizeof(unsigned long), GFP_KERNEL);
562 switch (grp->fmtype) {
563 case NVM_ID_FMTYPE_SLC:
564 if (nvm_init_slc_tbl(dev, grp)) {
569 case NVM_ID_FMTYPE_MLC:
570 if (nvm_init_mlc_tbl(dev, grp)) {
576 pr_err("nvm: flash type not supported\n");
581 mutex_init(&dev->mlock);
582 spin_lock_init(&dev->lock);
590 static void nvm_free_mgr(struct nvm_dev *dev)
595 dev->mt->unregister_mgr(dev);
599 static void nvm_free(struct nvm_dev *dev)
610 static int nvm_init(struct nvm_dev *dev)
614 if (!dev->q || !dev->ops)
617 if (dev->ops->identity(dev, &dev->identity)) {
618 pr_err("nvm: device could not be identified\n");
622 pr_debug("nvm: ver:%x nvm_vendor:%x groups:%u\n",
623 dev->identity.ver_id, dev->identity.vmnt,
624 dev->identity.cgrps);
626 if (dev->identity.ver_id != 1) {
627 pr_err("nvm: device not supported by kernel.");
631 if (dev->identity.cgrps != 1) {
632 pr_err("nvm: only one group configuration supported.");
636 ret = nvm_core_init(dev);
638 pr_err("nvm: could not initialize core structures.\n");
642 pr_info("nvm: registered %s [%u/%u/%u/%u/%u/%u]\n",
643 dev->name, dev->sec_per_pg, dev->nr_planes,
644 dev->pgs_per_blk, dev->blks_per_lun, dev->nr_luns,
648 pr_err("nvm: failed to initialize nvm\n");
652 static void nvm_exit(struct nvm_dev *dev)
655 dev->ops->destroy_dma_pool(dev->dma_pool);
658 pr_info("nvm: successfully unloaded\n");
661 int nvm_register(struct request_queue *q, char *disk_name,
662 struct nvm_dev_ops *ops)
670 dev = kzalloc(sizeof(struct nvm_dev), GFP_KERNEL);
676 strncpy(dev->name, disk_name, DISK_NAME_LEN);
682 if (dev->ops->max_phys_sect > 256) {
683 pr_info("nvm: max sectors supported is 256.\n");
688 if (dev->ops->max_phys_sect > 1) {
689 dev->dma_pool = dev->ops->create_dma_pool(dev, "ppalist");
690 if (!dev->dma_pool) {
691 pr_err("nvm: could not create dma pool\n");
697 if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) {
698 ret = nvm_get_sysblock(dev, &dev->sb);
700 pr_err("nvm: device not initialized.\n");
702 pr_err("nvm: err (%d) on device initialization\n", ret);
705 /* register device with a supported media manager */
706 down_write(&nvm_lock);
708 dev->mt = nvm_init_mgr(dev);
709 list_add(&dev->devices, &nvm_devices);
718 EXPORT_SYMBOL(nvm_register);
720 void nvm_unregister(char *disk_name)
724 down_write(&nvm_lock);
725 dev = nvm_find_nvm_dev(disk_name);
727 pr_err("nvm: could not find device %s to unregister\n",
733 list_del(&dev->devices);
739 EXPORT_SYMBOL(nvm_unregister);
741 static int __nvm_configure_create(struct nvm_ioctl_create *create)
744 struct nvm_ioctl_create_simple *s;
746 down_write(&nvm_lock);
747 dev = nvm_find_nvm_dev(create->dev);
751 pr_err("nvm: device not found\n");
756 pr_info("nvm: device has no media manager registered.\n");
760 if (create->conf.type != NVM_CONFIG_TYPE_SIMPLE) {
761 pr_err("nvm: config type not valid\n");
766 if (s->lun_begin > s->lun_end || s->lun_end > dev->nr_luns) {
767 pr_err("nvm: lun out of bound (%u:%u > %u)\n",
768 s->lun_begin, s->lun_end, dev->nr_luns);
772 return dev->mt->create_tgt(dev, create);
775 #ifdef CONFIG_NVM_DEBUG
776 static int nvm_configure_show(const char *val)
779 char opcode, devname[DISK_NAME_LEN];
782 ret = sscanf(val, "%c %32s", &opcode, devname);
784 pr_err("nvm: invalid command. Use \"opcode devicename\".\n");
788 down_write(&nvm_lock);
789 dev = nvm_find_nvm_dev(devname);
792 pr_err("nvm: device not found\n");
799 dev->mt->lun_info_print(dev);
804 static int nvm_configure_remove(const char *val)
806 struct nvm_ioctl_remove remove;
811 ret = sscanf(val, "%c %256s", &opcode, remove.tgtname);
813 pr_err("nvm: invalid command. Use \"d targetname\".\n");
819 list_for_each_entry(dev, &nvm_devices, devices) {
820 ret = dev->mt->remove_tgt(dev, &remove);
828 static int nvm_configure_create(const char *val)
830 struct nvm_ioctl_create create;
832 int lun_begin, lun_end, ret;
834 ret = sscanf(val, "%c %256s %256s %48s %u:%u", &opcode, create.dev,
835 create.tgtname, create.tgttype,
836 &lun_begin, &lun_end);
838 pr_err("nvm: invalid command. Use \"opcode device name tgttype lun_begin:lun_end\".\n");
843 create.conf.type = NVM_CONFIG_TYPE_SIMPLE;
844 create.conf.s.lun_begin = lun_begin;
845 create.conf.s.lun_end = lun_end;
847 return __nvm_configure_create(&create);
851 /* Exposes administrative interface through /sys/module/lnvm/configure_by_str */
852 static int nvm_configure_by_str_event(const char *val,
853 const struct kernel_param *kp)
858 ret = sscanf(val, "%c", &opcode);
860 pr_err("nvm: string must have the format of \"cmd ...\"\n");
866 return nvm_configure_create(val);
868 return nvm_configure_remove(val);
870 return nvm_configure_show(val);
872 pr_err("nvm: invalid command\n");
879 static int nvm_configure_get(char *buf, const struct kernel_param *kp)
884 sz = sprintf(buf, "available devices:\n");
885 down_write(&nvm_lock);
886 list_for_each_entry(dev, &nvm_devices, devices) {
887 if (sz > 4095 - DISK_NAME_LEN - 2)
889 sz += sprintf(buf + sz, " %32s\n", dev->name);
896 static const struct kernel_param_ops nvm_configure_by_str_event_param_ops = {
897 .set = nvm_configure_by_str_event,
898 .get = nvm_configure_get,
901 #undef MODULE_PARAM_PREFIX
902 #define MODULE_PARAM_PREFIX "lnvm."
904 module_param_cb(configure_debug, &nvm_configure_by_str_event_param_ops, NULL,
907 #endif /* CONFIG_NVM_DEBUG */
909 static long nvm_ioctl_info(struct file *file, void __user *arg)
911 struct nvm_ioctl_info *info;
912 struct nvm_tgt_type *tt;
915 if (!capable(CAP_SYS_ADMIN))
918 info = memdup_user(arg, sizeof(struct nvm_ioctl_info));
922 info->version[0] = NVM_VERSION_MAJOR;
923 info->version[1] = NVM_VERSION_MINOR;
924 info->version[2] = NVM_VERSION_PATCH;
926 down_write(&nvm_lock);
927 list_for_each_entry(tt, &nvm_tgt_types, list) {
928 struct nvm_ioctl_info_tgt *tgt = &info->tgts[tgt_iter];
930 tgt->version[0] = tt->version[0];
931 tgt->version[1] = tt->version[1];
932 tgt->version[2] = tt->version[2];
933 strncpy(tgt->tgtname, tt->name, NVM_TTYPE_NAME_MAX);
938 info->tgtsize = tgt_iter;
941 if (copy_to_user(arg, info, sizeof(struct nvm_ioctl_info))) {
950 static long nvm_ioctl_get_devices(struct file *file, void __user *arg)
952 struct nvm_ioctl_get_devices *devices;
956 if (!capable(CAP_SYS_ADMIN))
959 devices = kzalloc(sizeof(struct nvm_ioctl_get_devices), GFP_KERNEL);
963 down_write(&nvm_lock);
964 list_for_each_entry(dev, &nvm_devices, devices) {
965 struct nvm_ioctl_device_info *info = &devices->info[i];
967 sprintf(info->devname, "%s", dev->name);
969 info->bmversion[0] = dev->mt->version[0];
970 info->bmversion[1] = dev->mt->version[1];
971 info->bmversion[2] = dev->mt->version[2];
972 sprintf(info->bmname, "%s", dev->mt->name);
974 sprintf(info->bmname, "none");
979 pr_err("nvm: max 31 devices can be reported.\n");
985 devices->nr_devices = i;
987 if (copy_to_user(arg, devices,
988 sizeof(struct nvm_ioctl_get_devices))) {
997 static long nvm_ioctl_dev_create(struct file *file, void __user *arg)
999 struct nvm_ioctl_create create;
1001 if (!capable(CAP_SYS_ADMIN))
1004 if (copy_from_user(&create, arg, sizeof(struct nvm_ioctl_create)))
1007 create.dev[DISK_NAME_LEN - 1] = '\0';
1008 create.tgttype[NVM_TTYPE_NAME_MAX - 1] = '\0';
1009 create.tgtname[DISK_NAME_LEN - 1] = '\0';
1011 if (create.flags != 0) {
1012 pr_err("nvm: no flags supported\n");
1016 return __nvm_configure_create(&create);
1019 static long nvm_ioctl_dev_remove(struct file *file, void __user *arg)
1021 struct nvm_ioctl_remove remove;
1022 struct nvm_dev *dev;
1025 if (!capable(CAP_SYS_ADMIN))
1028 if (copy_from_user(&remove, arg, sizeof(struct nvm_ioctl_remove)))
1031 remove.tgtname[DISK_NAME_LEN - 1] = '\0';
1033 if (remove.flags != 0) {
1034 pr_err("nvm: no flags supported\n");
1038 list_for_each_entry(dev, &nvm_devices, devices) {
1039 ret = dev->mt->remove_tgt(dev, &remove);
1047 static void nvm_setup_nvm_sb_info(struct nvm_sb_info *info)
1050 info->erase_cnt = 0;
1054 static long __nvm_ioctl_dev_init(struct nvm_ioctl_dev_init *init)
1056 struct nvm_dev *dev;
1057 struct nvm_sb_info info;
1060 down_write(&nvm_lock);
1061 dev = nvm_find_nvm_dev(init->dev);
1062 up_write(&nvm_lock);
1064 pr_err("nvm: device not found\n");
1068 nvm_setup_nvm_sb_info(&info);
1070 strncpy(info.mmtype, init->mmtype, NVM_MMTYPE_LEN);
1071 info.fs_ppa.ppa = -1;
1073 if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) {
1074 ret = nvm_init_sysblock(dev, &info);
1079 memcpy(&dev->sb, &info, sizeof(struct nvm_sb_info));
1081 down_write(&nvm_lock);
1082 dev->mt = nvm_init_mgr(dev);
1083 up_write(&nvm_lock);
1088 static long nvm_ioctl_dev_init(struct file *file, void __user *arg)
1090 struct nvm_ioctl_dev_init init;
1092 if (!capable(CAP_SYS_ADMIN))
1095 if (copy_from_user(&init, arg, sizeof(struct nvm_ioctl_dev_init)))
1098 if (init.flags != 0) {
1099 pr_err("nvm: no flags supported\n");
1103 init.dev[DISK_NAME_LEN - 1] = '\0';
1105 return __nvm_ioctl_dev_init(&init);
1108 static long nvm_ioctl_dev_factory(struct file *file, void __user *arg)
1110 struct nvm_ioctl_dev_factory fact;
1111 struct nvm_dev *dev;
1113 if (!capable(CAP_SYS_ADMIN))
1116 if (copy_from_user(&fact, arg, sizeof(struct nvm_ioctl_dev_factory)))
1119 fact.dev[DISK_NAME_LEN - 1] = '\0';
1121 if (fact.flags & ~(NVM_FACTORY_NR_BITS - 1))
1124 down_write(&nvm_lock);
1125 dev = nvm_find_nvm_dev(fact.dev);
1126 up_write(&nvm_lock);
1128 pr_err("nvm: device not found\n");
1134 if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT)
1135 return nvm_dev_factory(dev, fact.flags);
1140 static long nvm_ctl_ioctl(struct file *file, uint cmd, unsigned long arg)
1142 void __user *argp = (void __user *)arg;
1146 return nvm_ioctl_info(file, argp);
1147 case NVM_GET_DEVICES:
1148 return nvm_ioctl_get_devices(file, argp);
1149 case NVM_DEV_CREATE:
1150 return nvm_ioctl_dev_create(file, argp);
1151 case NVM_DEV_REMOVE:
1152 return nvm_ioctl_dev_remove(file, argp);
1154 return nvm_ioctl_dev_init(file, argp);
1155 case NVM_DEV_FACTORY:
1156 return nvm_ioctl_dev_factory(file, argp);
1161 static const struct file_operations _ctl_fops = {
1162 .open = nonseekable_open,
1163 .unlocked_ioctl = nvm_ctl_ioctl,
1164 .owner = THIS_MODULE,
1165 .llseek = noop_llseek,
1168 static struct miscdevice _nvm_misc = {
1169 .minor = MISC_DYNAMIC_MINOR,
1171 .nodename = "lightnvm/control",
1174 module_misc_device(_nvm_misc);
1176 MODULE_ALIAS_MISCDEV(MISC_DYNAMIC_MINOR);
1178 MODULE_AUTHOR("Matias Bjorling <m@bjorling.me>");
1179 MODULE_LICENSE("GPL v2");
1180 MODULE_VERSION("0.1");