1260 lines
27 KiB
C
1260 lines
27 KiB
C
/*
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* Copyright (C) 2015 IT University of Copenhagen. All rights reserved.
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* Initial release: Matias Bjorling <m@bjorling.me>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
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* USA.
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*
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*/
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#include <linux/list.h>
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#include <linux/types.h>
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#include <linux/sem.h>
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#include <linux/bitmap.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/miscdevice.h>
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#include <linux/lightnvm.h>
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#include <linux/sched/sysctl.h>
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static LIST_HEAD(nvm_tgt_types);
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static DECLARE_RWSEM(nvm_tgtt_lock);
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static LIST_HEAD(nvm_devices);
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static DECLARE_RWSEM(nvm_lock);
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/* Map between virtual and physical channel and lun */
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struct nvm_ch_map {
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int ch_off;
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int nr_luns;
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int *lun_offs;
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};
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struct nvm_dev_map {
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struct nvm_ch_map *chnls;
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int nr_chnls;
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};
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static struct nvm_target *nvm_find_target(struct nvm_dev *dev, const char *name)
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{
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struct nvm_target *tgt;
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list_for_each_entry(tgt, &dev->targets, list)
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if (!strcmp(name, tgt->disk->disk_name))
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return tgt;
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return NULL;
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}
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static bool nvm_target_exists(const char *name)
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{
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struct nvm_dev *dev;
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struct nvm_target *tgt;
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bool ret = false;
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down_write(&nvm_lock);
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list_for_each_entry(dev, &nvm_devices, devices) {
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mutex_lock(&dev->mlock);
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list_for_each_entry(tgt, &dev->targets, list) {
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if (!strcmp(name, tgt->disk->disk_name)) {
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ret = true;
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mutex_unlock(&dev->mlock);
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goto out;
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}
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}
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mutex_unlock(&dev->mlock);
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}
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out:
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up_write(&nvm_lock);
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return ret;
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}
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static int nvm_reserve_luns(struct nvm_dev *dev, int lun_begin, int lun_end)
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{
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int i;
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for (i = lun_begin; i <= lun_end; i++) {
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if (test_and_set_bit(i, dev->lun_map)) {
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pr_err("nvm: lun %d already allocated\n", i);
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goto err;
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}
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}
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return 0;
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err:
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while (--i >= lun_begin)
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clear_bit(i, dev->lun_map);
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return -EBUSY;
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}
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static void nvm_release_luns_err(struct nvm_dev *dev, int lun_begin,
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int lun_end)
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{
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int i;
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for (i = lun_begin; i <= lun_end; i++)
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WARN_ON(!test_and_clear_bit(i, dev->lun_map));
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}
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static void nvm_remove_tgt_dev(struct nvm_tgt_dev *tgt_dev, int clear)
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{
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struct nvm_dev *dev = tgt_dev->parent;
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struct nvm_dev_map *dev_map = tgt_dev->map;
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int i, j;
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for (i = 0; i < dev_map->nr_chnls; i++) {
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struct nvm_ch_map *ch_map = &dev_map->chnls[i];
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int *lun_offs = ch_map->lun_offs;
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int ch = i + ch_map->ch_off;
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if (clear) {
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for (j = 0; j < ch_map->nr_luns; j++) {
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int lun = j + lun_offs[j];
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int lunid = (ch * dev->geo.nr_luns) + lun;
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WARN_ON(!test_and_clear_bit(lunid,
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dev->lun_map));
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}
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}
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kfree(ch_map->lun_offs);
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}
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kfree(dev_map->chnls);
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kfree(dev_map);
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kfree(tgt_dev->luns);
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kfree(tgt_dev);
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}
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static struct nvm_tgt_dev *nvm_create_tgt_dev(struct nvm_dev *dev,
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u16 lun_begin, u16 lun_end,
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u16 op)
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{
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struct nvm_tgt_dev *tgt_dev = NULL;
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struct nvm_dev_map *dev_rmap = dev->rmap;
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struct nvm_dev_map *dev_map;
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struct ppa_addr *luns;
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int nr_luns = lun_end - lun_begin + 1;
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int luns_left = nr_luns;
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int nr_chnls = nr_luns / dev->geo.nr_luns;
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int nr_chnls_mod = nr_luns % dev->geo.nr_luns;
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int bch = lun_begin / dev->geo.nr_luns;
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int blun = lun_begin % dev->geo.nr_luns;
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int lunid = 0;
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int lun_balanced = 1;
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int prev_nr_luns;
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int i, j;
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nr_chnls = (nr_chnls_mod == 0) ? nr_chnls : nr_chnls + 1;
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dev_map = kmalloc(sizeof(struct nvm_dev_map), GFP_KERNEL);
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if (!dev_map)
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goto err_dev;
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dev_map->chnls = kcalloc(nr_chnls, sizeof(struct nvm_ch_map),
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GFP_KERNEL);
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if (!dev_map->chnls)
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goto err_chnls;
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luns = kcalloc(nr_luns, sizeof(struct ppa_addr), GFP_KERNEL);
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if (!luns)
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goto err_luns;
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prev_nr_luns = (luns_left > dev->geo.nr_luns) ?
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dev->geo.nr_luns : luns_left;
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for (i = 0; i < nr_chnls; i++) {
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struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[i + bch];
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int *lun_roffs = ch_rmap->lun_offs;
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struct nvm_ch_map *ch_map = &dev_map->chnls[i];
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int *lun_offs;
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int luns_in_chnl = (luns_left > dev->geo.nr_luns) ?
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dev->geo.nr_luns : luns_left;
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if (lun_balanced && prev_nr_luns != luns_in_chnl)
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lun_balanced = 0;
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ch_map->ch_off = ch_rmap->ch_off = bch;
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ch_map->nr_luns = luns_in_chnl;
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lun_offs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL);
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if (!lun_offs)
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goto err_ch;
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for (j = 0; j < luns_in_chnl; j++) {
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luns[lunid].ppa = 0;
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luns[lunid].g.ch = i;
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luns[lunid++].g.lun = j;
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lun_offs[j] = blun;
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lun_roffs[j + blun] = blun;
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}
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ch_map->lun_offs = lun_offs;
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/* when starting a new channel, lun offset is reset */
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blun = 0;
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luns_left -= luns_in_chnl;
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}
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dev_map->nr_chnls = nr_chnls;
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tgt_dev = kmalloc(sizeof(struct nvm_tgt_dev), GFP_KERNEL);
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if (!tgt_dev)
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goto err_ch;
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memcpy(&tgt_dev->geo, &dev->geo, sizeof(struct nvm_geo));
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/* Target device only owns a portion of the physical device */
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tgt_dev->geo.nr_chnls = nr_chnls;
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tgt_dev->geo.all_luns = nr_luns;
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tgt_dev->geo.nr_luns = (lun_balanced) ? prev_nr_luns : -1;
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tgt_dev->geo.op = op;
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tgt_dev->total_secs = nr_luns * tgt_dev->geo.sec_per_lun;
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tgt_dev->q = dev->q;
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tgt_dev->map = dev_map;
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tgt_dev->luns = luns;
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memcpy(&tgt_dev->identity, &dev->identity, sizeof(struct nvm_id));
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tgt_dev->parent = dev;
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return tgt_dev;
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err_ch:
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while (--i >= 0)
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kfree(dev_map->chnls[i].lun_offs);
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kfree(luns);
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err_luns:
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kfree(dev_map->chnls);
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err_chnls:
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kfree(dev_map);
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err_dev:
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return tgt_dev;
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}
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static const struct block_device_operations nvm_fops = {
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.owner = THIS_MODULE,
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};
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static struct nvm_tgt_type *__nvm_find_target_type(const char *name)
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{
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struct nvm_tgt_type *tt;
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list_for_each_entry(tt, &nvm_tgt_types, list)
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if (!strcmp(name, tt->name))
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return tt;
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return NULL;
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}
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static struct nvm_tgt_type *nvm_find_target_type(const char *name)
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{
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struct nvm_tgt_type *tt;
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down_write(&nvm_tgtt_lock);
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tt = __nvm_find_target_type(name);
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up_write(&nvm_tgtt_lock);
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return tt;
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}
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static int nvm_config_check_luns(struct nvm_geo *geo, int lun_begin,
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int lun_end)
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{
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if (lun_begin > lun_end || lun_end >= geo->all_luns) {
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pr_err("nvm: lun out of bound (%u:%u > %u)\n",
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lun_begin, lun_end, geo->all_luns - 1);
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return -EINVAL;
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}
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return 0;
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}
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static int __nvm_config_simple(struct nvm_dev *dev,
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struct nvm_ioctl_create_simple *s)
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{
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struct nvm_geo *geo = &dev->geo;
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if (s->lun_begin == -1 && s->lun_end == -1) {
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s->lun_begin = 0;
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s->lun_end = geo->all_luns - 1;
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}
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return nvm_config_check_luns(geo, s->lun_begin, s->lun_end);
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}
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static int __nvm_config_extended(struct nvm_dev *dev,
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struct nvm_ioctl_create_extended *e)
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{
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struct nvm_geo *geo = &dev->geo;
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if (e->lun_begin == 0xFFFF && e->lun_end == 0xFFFF) {
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e->lun_begin = 0;
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e->lun_end = dev->geo.all_luns - 1;
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}
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/* op not set falls into target's default */
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if (e->op == 0xFFFF)
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e->op = NVM_TARGET_DEFAULT_OP;
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if (e->op < NVM_TARGET_MIN_OP ||
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e->op > NVM_TARGET_MAX_OP) {
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pr_err("nvm: invalid over provisioning value\n");
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return -EINVAL;
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}
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return nvm_config_check_luns(geo, e->lun_begin, e->lun_end);
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}
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static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
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{
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struct nvm_ioctl_create_extended e;
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struct request_queue *tqueue;
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struct gendisk *tdisk;
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struct nvm_tgt_type *tt;
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struct nvm_target *t;
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struct nvm_tgt_dev *tgt_dev;
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void *targetdata;
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int ret;
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switch (create->conf.type) {
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case NVM_CONFIG_TYPE_SIMPLE:
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ret = __nvm_config_simple(dev, &create->conf.s);
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if (ret)
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return ret;
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e.lun_begin = create->conf.s.lun_begin;
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e.lun_end = create->conf.s.lun_end;
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e.op = NVM_TARGET_DEFAULT_OP;
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break;
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case NVM_CONFIG_TYPE_EXTENDED:
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ret = __nvm_config_extended(dev, &create->conf.e);
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if (ret)
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return ret;
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e = create->conf.e;
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break;
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default:
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pr_err("nvm: config type not valid\n");
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return -EINVAL;
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}
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tt = nvm_find_target_type(create->tgttype);
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if (!tt) {
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pr_err("nvm: target type %s not found\n", create->tgttype);
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return -EINVAL;
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}
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if (nvm_target_exists(create->tgtname)) {
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pr_err("nvm: target name already exists (%s)\n",
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create->tgtname);
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return -EINVAL;
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}
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ret = nvm_reserve_luns(dev, e.lun_begin, e.lun_end);
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if (ret)
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return ret;
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t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL);
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if (!t) {
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ret = -ENOMEM;
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goto err_reserve;
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}
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tgt_dev = nvm_create_tgt_dev(dev, e.lun_begin, e.lun_end, e.op);
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if (!tgt_dev) {
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pr_err("nvm: could not create target device\n");
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ret = -ENOMEM;
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goto err_t;
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}
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tdisk = alloc_disk(0);
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if (!tdisk) {
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ret = -ENOMEM;
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goto err_dev;
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}
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tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node);
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if (!tqueue) {
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ret = -ENOMEM;
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goto err_disk;
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}
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blk_queue_make_request(tqueue, tt->make_rq);
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strlcpy(tdisk->disk_name, create->tgtname, sizeof(tdisk->disk_name));
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tdisk->flags = GENHD_FL_EXT_DEVT;
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tdisk->major = 0;
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tdisk->first_minor = 0;
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tdisk->fops = &nvm_fops;
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tdisk->queue = tqueue;
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|
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targetdata = tt->init(tgt_dev, tdisk, create->flags);
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if (IS_ERR(targetdata)) {
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ret = PTR_ERR(targetdata);
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goto err_init;
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}
|
|
|
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tdisk->private_data = targetdata;
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tqueue->queuedata = targetdata;
|
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|
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blk_queue_max_hw_sectors(tqueue, 8 * dev->ops->max_phys_sect);
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|
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set_capacity(tdisk, tt->capacity(targetdata));
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add_disk(tdisk);
|
|
|
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if (tt->sysfs_init && tt->sysfs_init(tdisk)) {
|
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ret = -ENOMEM;
|
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goto err_sysfs;
|
|
}
|
|
|
|
t->type = tt;
|
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t->disk = tdisk;
|
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t->dev = tgt_dev;
|
|
|
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mutex_lock(&dev->mlock);
|
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list_add_tail(&t->list, &dev->targets);
|
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mutex_unlock(&dev->mlock);
|
|
|
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__module_get(tt->owner);
|
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|
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return 0;
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err_sysfs:
|
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if (tt->exit)
|
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tt->exit(targetdata);
|
|
err_init:
|
|
blk_cleanup_queue(tqueue);
|
|
tdisk->queue = NULL;
|
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err_disk:
|
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put_disk(tdisk);
|
|
err_dev:
|
|
nvm_remove_tgt_dev(tgt_dev, 0);
|
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err_t:
|
|
kfree(t);
|
|
err_reserve:
|
|
nvm_release_luns_err(dev, e.lun_begin, e.lun_end);
|
|
return ret;
|
|
}
|
|
|
|
static void __nvm_remove_target(struct nvm_target *t)
|
|
{
|
|
struct nvm_tgt_type *tt = t->type;
|
|
struct gendisk *tdisk = t->disk;
|
|
struct request_queue *q = tdisk->queue;
|
|
|
|
del_gendisk(tdisk);
|
|
blk_cleanup_queue(q);
|
|
|
|
if (tt->sysfs_exit)
|
|
tt->sysfs_exit(tdisk);
|
|
|
|
if (tt->exit)
|
|
tt->exit(tdisk->private_data);
|
|
|
|
nvm_remove_tgt_dev(t->dev, 1);
|
|
put_disk(tdisk);
|
|
module_put(t->type->owner);
|
|
|
|
list_del(&t->list);
|
|
kfree(t);
|
|
}
|
|
|
|
/**
|
|
* nvm_remove_tgt - Removes a target from the media manager
|
|
* @dev: device
|
|
* @remove: ioctl structure with target name to remove.
|
|
*
|
|
* Returns:
|
|
* 0: on success
|
|
* 1: on not found
|
|
* <0: on error
|
|
*/
|
|
static int nvm_remove_tgt(struct nvm_dev *dev, struct nvm_ioctl_remove *remove)
|
|
{
|
|
struct nvm_target *t;
|
|
|
|
mutex_lock(&dev->mlock);
|
|
t = nvm_find_target(dev, remove->tgtname);
|
|
if (!t) {
|
|
mutex_unlock(&dev->mlock);
|
|
return 1;
|
|
}
|
|
__nvm_remove_target(t);
|
|
mutex_unlock(&dev->mlock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nvm_register_map(struct nvm_dev *dev)
|
|
{
|
|
struct nvm_dev_map *rmap;
|
|
int i, j;
|
|
|
|
rmap = kmalloc(sizeof(struct nvm_dev_map), GFP_KERNEL);
|
|
if (!rmap)
|
|
goto err_rmap;
|
|
|
|
rmap->chnls = kcalloc(dev->geo.nr_chnls, sizeof(struct nvm_ch_map),
|
|
GFP_KERNEL);
|
|
if (!rmap->chnls)
|
|
goto err_chnls;
|
|
|
|
for (i = 0; i < dev->geo.nr_chnls; i++) {
|
|
struct nvm_ch_map *ch_rmap;
|
|
int *lun_roffs;
|
|
int luns_in_chnl = dev->geo.nr_luns;
|
|
|
|
ch_rmap = &rmap->chnls[i];
|
|
|
|
ch_rmap->ch_off = -1;
|
|
ch_rmap->nr_luns = luns_in_chnl;
|
|
|
|
lun_roffs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL);
|
|
if (!lun_roffs)
|
|
goto err_ch;
|
|
|
|
for (j = 0; j < luns_in_chnl; j++)
|
|
lun_roffs[j] = -1;
|
|
|
|
ch_rmap->lun_offs = lun_roffs;
|
|
}
|
|
|
|
dev->rmap = rmap;
|
|
|
|
return 0;
|
|
err_ch:
|
|
while (--i >= 0)
|
|
kfree(rmap->chnls[i].lun_offs);
|
|
err_chnls:
|
|
kfree(rmap);
|
|
err_rmap:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static void nvm_unregister_map(struct nvm_dev *dev)
|
|
{
|
|
struct nvm_dev_map *rmap = dev->rmap;
|
|
int i;
|
|
|
|
for (i = 0; i < dev->geo.nr_chnls; i++)
|
|
kfree(rmap->chnls[i].lun_offs);
|
|
|
|
kfree(rmap->chnls);
|
|
kfree(rmap);
|
|
}
|
|
|
|
static void nvm_map_to_dev(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p)
|
|
{
|
|
struct nvm_dev_map *dev_map = tgt_dev->map;
|
|
struct nvm_ch_map *ch_map = &dev_map->chnls[p->g.ch];
|
|
int lun_off = ch_map->lun_offs[p->g.lun];
|
|
|
|
p->g.ch += ch_map->ch_off;
|
|
p->g.lun += lun_off;
|
|
}
|
|
|
|
static void nvm_map_to_tgt(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p)
|
|
{
|
|
struct nvm_dev *dev = tgt_dev->parent;
|
|
struct nvm_dev_map *dev_rmap = dev->rmap;
|
|
struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[p->g.ch];
|
|
int lun_roff = ch_rmap->lun_offs[p->g.lun];
|
|
|
|
p->g.ch -= ch_rmap->ch_off;
|
|
p->g.lun -= lun_roff;
|
|
}
|
|
|
|
static void nvm_ppa_tgt_to_dev(struct nvm_tgt_dev *tgt_dev,
|
|
struct ppa_addr *ppa_list, int nr_ppas)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < nr_ppas; i++) {
|
|
nvm_map_to_dev(tgt_dev, &ppa_list[i]);
|
|
ppa_list[i] = generic_to_dev_addr(tgt_dev, ppa_list[i]);
|
|
}
|
|
}
|
|
|
|
static void nvm_ppa_dev_to_tgt(struct nvm_tgt_dev *tgt_dev,
|
|
struct ppa_addr *ppa_list, int nr_ppas)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < nr_ppas; i++) {
|
|
ppa_list[i] = dev_to_generic_addr(tgt_dev, ppa_list[i]);
|
|
nvm_map_to_tgt(tgt_dev, &ppa_list[i]);
|
|
}
|
|
}
|
|
|
|
static void nvm_rq_tgt_to_dev(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
|
|
{
|
|
if (rqd->nr_ppas == 1) {
|
|
nvm_ppa_tgt_to_dev(tgt_dev, &rqd->ppa_addr, 1);
|
|
return;
|
|
}
|
|
|
|
nvm_ppa_tgt_to_dev(tgt_dev, rqd->ppa_list, rqd->nr_ppas);
|
|
}
|
|
|
|
static void nvm_rq_dev_to_tgt(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
|
|
{
|
|
if (rqd->nr_ppas == 1) {
|
|
nvm_ppa_dev_to_tgt(tgt_dev, &rqd->ppa_addr, 1);
|
|
return;
|
|
}
|
|
|
|
nvm_ppa_dev_to_tgt(tgt_dev, rqd->ppa_list, rqd->nr_ppas);
|
|
}
|
|
|
|
int nvm_register_tgt_type(struct nvm_tgt_type *tt)
|
|
{
|
|
int ret = 0;
|
|
|
|
down_write(&nvm_tgtt_lock);
|
|
if (__nvm_find_target_type(tt->name))
|
|
ret = -EEXIST;
|
|
else
|
|
list_add(&tt->list, &nvm_tgt_types);
|
|
up_write(&nvm_tgtt_lock);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(nvm_register_tgt_type);
|
|
|
|
void nvm_unregister_tgt_type(struct nvm_tgt_type *tt)
|
|
{
|
|
if (!tt)
|
|
return;
|
|
|
|
down_write(&nvm_tgtt_lock);
|
|
list_del(&tt->list);
|
|
up_write(&nvm_tgtt_lock);
|
|
}
|
|
EXPORT_SYMBOL(nvm_unregister_tgt_type);
|
|
|
|
void *nvm_dev_dma_alloc(struct nvm_dev *dev, gfp_t mem_flags,
|
|
dma_addr_t *dma_handler)
|
|
{
|
|
return dev->ops->dev_dma_alloc(dev, dev->dma_pool, mem_flags,
|
|
dma_handler);
|
|
}
|
|
EXPORT_SYMBOL(nvm_dev_dma_alloc);
|
|
|
|
void nvm_dev_dma_free(struct nvm_dev *dev, void *addr, dma_addr_t dma_handler)
|
|
{
|
|
dev->ops->dev_dma_free(dev->dma_pool, addr, dma_handler);
|
|
}
|
|
EXPORT_SYMBOL(nvm_dev_dma_free);
|
|
|
|
static struct nvm_dev *nvm_find_nvm_dev(const char *name)
|
|
{
|
|
struct nvm_dev *dev;
|
|
|
|
list_for_each_entry(dev, &nvm_devices, devices)
|
|
if (!strcmp(name, dev->name))
|
|
return dev;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int nvm_set_rqd_ppalist(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd,
|
|
const struct ppa_addr *ppas, int nr_ppas)
|
|
{
|
|
struct nvm_dev *dev = tgt_dev->parent;
|
|
struct nvm_geo *geo = &tgt_dev->geo;
|
|
int i, plane_cnt, pl_idx;
|
|
struct ppa_addr ppa;
|
|
|
|
if (geo->plane_mode == NVM_PLANE_SINGLE && nr_ppas == 1) {
|
|
rqd->nr_ppas = nr_ppas;
|
|
rqd->ppa_addr = ppas[0];
|
|
|
|
return 0;
|
|
}
|
|
|
|
rqd->nr_ppas = nr_ppas;
|
|
rqd->ppa_list = nvm_dev_dma_alloc(dev, GFP_KERNEL, &rqd->dma_ppa_list);
|
|
if (!rqd->ppa_list) {
|
|
pr_err("nvm: failed to allocate dma memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
plane_cnt = geo->plane_mode;
|
|
rqd->nr_ppas *= plane_cnt;
|
|
|
|
for (i = 0; i < nr_ppas; i++) {
|
|
for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) {
|
|
ppa = ppas[i];
|
|
ppa.g.pl = pl_idx;
|
|
rqd->ppa_list[(pl_idx * nr_ppas) + i] = ppa;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void nvm_free_rqd_ppalist(struct nvm_tgt_dev *tgt_dev,
|
|
struct nvm_rq *rqd)
|
|
{
|
|
if (!rqd->ppa_list)
|
|
return;
|
|
|
|
nvm_dev_dma_free(tgt_dev->parent, rqd->ppa_list, rqd->dma_ppa_list);
|
|
}
|
|
|
|
|
|
int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas,
|
|
int nr_ppas, int type)
|
|
{
|
|
struct nvm_dev *dev = tgt_dev->parent;
|
|
struct nvm_rq rqd;
|
|
int ret;
|
|
|
|
if (nr_ppas > dev->ops->max_phys_sect) {
|
|
pr_err("nvm: unable to update all blocks atomically\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
memset(&rqd, 0, sizeof(struct nvm_rq));
|
|
|
|
nvm_set_rqd_ppalist(tgt_dev, &rqd, ppas, nr_ppas);
|
|
nvm_rq_tgt_to_dev(tgt_dev, &rqd);
|
|
|
|
ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type);
|
|
nvm_free_rqd_ppalist(tgt_dev, &rqd);
|
|
if (ret) {
|
|
pr_err("nvm: failed bb mark\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(nvm_set_tgt_bb_tbl);
|
|
|
|
int nvm_max_phys_sects(struct nvm_tgt_dev *tgt_dev)
|
|
{
|
|
struct nvm_dev *dev = tgt_dev->parent;
|
|
|
|
return dev->ops->max_phys_sect;
|
|
}
|
|
EXPORT_SYMBOL(nvm_max_phys_sects);
|
|
|
|
int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
|
|
{
|
|
struct nvm_dev *dev = tgt_dev->parent;
|
|
int ret;
|
|
|
|
if (!dev->ops->submit_io)
|
|
return -ENODEV;
|
|
|
|
nvm_rq_tgt_to_dev(tgt_dev, rqd);
|
|
|
|
rqd->dev = tgt_dev;
|
|
|
|
/* In case of error, fail with right address format */
|
|
ret = dev->ops->submit_io(dev, rqd);
|
|
if (ret)
|
|
nvm_rq_dev_to_tgt(tgt_dev, rqd);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(nvm_submit_io);
|
|
|
|
int nvm_submit_io_sync(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
|
|
{
|
|
struct nvm_dev *dev = tgt_dev->parent;
|
|
int ret;
|
|
|
|
if (!dev->ops->submit_io_sync)
|
|
return -ENODEV;
|
|
|
|
nvm_rq_tgt_to_dev(tgt_dev, rqd);
|
|
|
|
rqd->dev = tgt_dev;
|
|
|
|
/* In case of error, fail with right address format */
|
|
ret = dev->ops->submit_io_sync(dev, rqd);
|
|
nvm_rq_dev_to_tgt(tgt_dev, rqd);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(nvm_submit_io_sync);
|
|
|
|
void nvm_end_io(struct nvm_rq *rqd)
|
|
{
|
|
struct nvm_tgt_dev *tgt_dev = rqd->dev;
|
|
|
|
/* Convert address space */
|
|
if (tgt_dev)
|
|
nvm_rq_dev_to_tgt(tgt_dev, rqd);
|
|
|
|
if (rqd->end_io)
|
|
rqd->end_io(rqd);
|
|
}
|
|
EXPORT_SYMBOL(nvm_end_io);
|
|
|
|
/*
|
|
* folds a bad block list from its plane representation to its virtual
|
|
* block representation. The fold is done in place and reduced size is
|
|
* returned.
|
|
*
|
|
* If any of the planes status are bad or grown bad block, the virtual block
|
|
* is marked bad. If not bad, the first plane state acts as the block state.
|
|
*/
|
|
int nvm_bb_tbl_fold(struct nvm_dev *dev, u8 *blks, int nr_blks)
|
|
{
|
|
struct nvm_geo *geo = &dev->geo;
|
|
int blk, offset, pl, blktype;
|
|
|
|
if (nr_blks != geo->nr_chks * geo->plane_mode)
|
|
return -EINVAL;
|
|
|
|
for (blk = 0; blk < geo->nr_chks; blk++) {
|
|
offset = blk * geo->plane_mode;
|
|
blktype = blks[offset];
|
|
|
|
/* Bad blocks on any planes take precedence over other types */
|
|
for (pl = 0; pl < geo->plane_mode; pl++) {
|
|
if (blks[offset + pl] &
|
|
(NVM_BLK_T_BAD|NVM_BLK_T_GRWN_BAD)) {
|
|
blktype = blks[offset + pl];
|
|
break;
|
|
}
|
|
}
|
|
|
|
blks[blk] = blktype;
|
|
}
|
|
|
|
return geo->nr_chks;
|
|
}
|
|
EXPORT_SYMBOL(nvm_bb_tbl_fold);
|
|
|
|
int nvm_get_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr ppa,
|
|
u8 *blks)
|
|
{
|
|
struct nvm_dev *dev = tgt_dev->parent;
|
|
|
|
nvm_ppa_tgt_to_dev(tgt_dev, &ppa, 1);
|
|
|
|
return dev->ops->get_bb_tbl(dev, ppa, blks);
|
|
}
|
|
EXPORT_SYMBOL(nvm_get_tgt_bb_tbl);
|
|
|
|
static int nvm_core_init(struct nvm_dev *dev)
|
|
{
|
|
struct nvm_id *id = &dev->identity;
|
|
struct nvm_id_group *grp = &id->grp;
|
|
struct nvm_geo *geo = &dev->geo;
|
|
int ret;
|
|
|
|
memcpy(&geo->ppaf, &id->ppaf, sizeof(struct nvm_addr_format));
|
|
|
|
if (grp->mtype != 0) {
|
|
pr_err("nvm: memory type not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Whole device values */
|
|
geo->nr_chnls = grp->num_ch;
|
|
geo->nr_luns = grp->num_lun;
|
|
|
|
/* Generic device geometry values */
|
|
geo->ws_min = grp->ws_min;
|
|
geo->ws_opt = grp->ws_opt;
|
|
geo->ws_seq = grp->ws_seq;
|
|
geo->ws_per_chk = grp->ws_per_chk;
|
|
geo->nr_chks = grp->num_chk;
|
|
geo->sec_size = grp->csecs;
|
|
geo->oob_size = grp->sos;
|
|
geo->mccap = grp->mccap;
|
|
geo->max_rq_size = dev->ops->max_phys_sect * geo->sec_size;
|
|
|
|
geo->sec_per_chk = grp->clba;
|
|
geo->sec_per_lun = geo->sec_per_chk * geo->nr_chks;
|
|
geo->all_luns = geo->nr_luns * geo->nr_chnls;
|
|
|
|
/* 1.2 spec device geometry values */
|
|
geo->plane_mode = 1 << geo->ws_seq;
|
|
geo->nr_planes = geo->ws_opt / geo->ws_min;
|
|
geo->sec_per_pg = geo->ws_min;
|
|
geo->sec_per_pl = geo->sec_per_pg * geo->nr_planes;
|
|
|
|
dev->total_secs = geo->all_luns * geo->sec_per_lun;
|
|
dev->lun_map = kcalloc(BITS_TO_LONGS(geo->all_luns),
|
|
sizeof(unsigned long), GFP_KERNEL);
|
|
if (!dev->lun_map)
|
|
return -ENOMEM;
|
|
|
|
INIT_LIST_HEAD(&dev->area_list);
|
|
INIT_LIST_HEAD(&dev->targets);
|
|
mutex_init(&dev->mlock);
|
|
spin_lock_init(&dev->lock);
|
|
|
|
ret = nvm_register_map(dev);
|
|
if (ret)
|
|
goto err_fmtype;
|
|
|
|
blk_queue_logical_block_size(dev->q, geo->sec_size);
|
|
return 0;
|
|
err_fmtype:
|
|
kfree(dev->lun_map);
|
|
return ret;
|
|
}
|
|
|
|
static void nvm_free(struct nvm_dev *dev)
|
|
{
|
|
if (!dev)
|
|
return;
|
|
|
|
if (dev->dma_pool)
|
|
dev->ops->destroy_dma_pool(dev->dma_pool);
|
|
|
|
nvm_unregister_map(dev);
|
|
kfree(dev->lun_map);
|
|
kfree(dev);
|
|
}
|
|
|
|
static int nvm_init(struct nvm_dev *dev)
|
|
{
|
|
struct nvm_geo *geo = &dev->geo;
|
|
int ret = -EINVAL;
|
|
|
|
if (dev->ops->identity(dev, &dev->identity)) {
|
|
pr_err("nvm: device could not be identified\n");
|
|
goto err;
|
|
}
|
|
|
|
pr_debug("nvm: ver:%x nvm_vendor:%x\n",
|
|
dev->identity.ver_id, dev->identity.vmnt);
|
|
|
|
if (dev->identity.ver_id != 1) {
|
|
pr_err("nvm: device not supported by kernel.");
|
|
goto err;
|
|
}
|
|
|
|
ret = nvm_core_init(dev);
|
|
if (ret) {
|
|
pr_err("nvm: could not initialize core structures.\n");
|
|
goto err;
|
|
}
|
|
|
|
pr_info("nvm: registered %s [%u/%u/%u/%u/%u/%u]\n",
|
|
dev->name, geo->sec_per_pg, geo->nr_planes,
|
|
geo->ws_per_chk, geo->nr_chks,
|
|
geo->all_luns, geo->nr_chnls);
|
|
return 0;
|
|
err:
|
|
pr_err("nvm: failed to initialize nvm\n");
|
|
return ret;
|
|
}
|
|
|
|
struct nvm_dev *nvm_alloc_dev(int node)
|
|
{
|
|
return kzalloc_node(sizeof(struct nvm_dev), GFP_KERNEL, node);
|
|
}
|
|
EXPORT_SYMBOL(nvm_alloc_dev);
|
|
|
|
int nvm_register(struct nvm_dev *dev)
|
|
{
|
|
int ret;
|
|
|
|
if (!dev->q || !dev->ops)
|
|
return -EINVAL;
|
|
|
|
if (dev->ops->max_phys_sect > 256) {
|
|
pr_info("nvm: max sectors supported is 256.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (dev->ops->max_phys_sect > 1) {
|
|
dev->dma_pool = dev->ops->create_dma_pool(dev, "ppalist");
|
|
if (!dev->dma_pool) {
|
|
pr_err("nvm: could not create dma pool\n");
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
|
|
ret = nvm_init(dev);
|
|
if (ret)
|
|
goto err_init;
|
|
|
|
/* register device with a supported media manager */
|
|
down_write(&nvm_lock);
|
|
list_add(&dev->devices, &nvm_devices);
|
|
up_write(&nvm_lock);
|
|
|
|
return 0;
|
|
err_init:
|
|
dev->ops->destroy_dma_pool(dev->dma_pool);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(nvm_register);
|
|
|
|
void nvm_unregister(struct nvm_dev *dev)
|
|
{
|
|
struct nvm_target *t, *tmp;
|
|
|
|
mutex_lock(&dev->mlock);
|
|
list_for_each_entry_safe(t, tmp, &dev->targets, list) {
|
|
if (t->dev->parent != dev)
|
|
continue;
|
|
__nvm_remove_target(t);
|
|
}
|
|
mutex_unlock(&dev->mlock);
|
|
|
|
down_write(&nvm_lock);
|
|
list_del(&dev->devices);
|
|
up_write(&nvm_lock);
|
|
|
|
nvm_free(dev);
|
|
}
|
|
EXPORT_SYMBOL(nvm_unregister);
|
|
|
|
static int __nvm_configure_create(struct nvm_ioctl_create *create)
|
|
{
|
|
struct nvm_dev *dev;
|
|
|
|
down_write(&nvm_lock);
|
|
dev = nvm_find_nvm_dev(create->dev);
|
|
up_write(&nvm_lock);
|
|
|
|
if (!dev) {
|
|
pr_err("nvm: device not found\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return nvm_create_tgt(dev, create);
|
|
}
|
|
|
|
static long nvm_ioctl_info(struct file *file, void __user *arg)
|
|
{
|
|
struct nvm_ioctl_info *info;
|
|
struct nvm_tgt_type *tt;
|
|
int tgt_iter = 0;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
info = memdup_user(arg, sizeof(struct nvm_ioctl_info));
|
|
if (IS_ERR(info))
|
|
return -EFAULT;
|
|
|
|
info->version[0] = NVM_VERSION_MAJOR;
|
|
info->version[1] = NVM_VERSION_MINOR;
|
|
info->version[2] = NVM_VERSION_PATCH;
|
|
|
|
down_write(&nvm_tgtt_lock);
|
|
list_for_each_entry(tt, &nvm_tgt_types, list) {
|
|
struct nvm_ioctl_info_tgt *tgt = &info->tgts[tgt_iter];
|
|
|
|
tgt->version[0] = tt->version[0];
|
|
tgt->version[1] = tt->version[1];
|
|
tgt->version[2] = tt->version[2];
|
|
strncpy(tgt->tgtname, tt->name, NVM_TTYPE_NAME_MAX);
|
|
|
|
tgt_iter++;
|
|
}
|
|
|
|
info->tgtsize = tgt_iter;
|
|
up_write(&nvm_tgtt_lock);
|
|
|
|
if (copy_to_user(arg, info, sizeof(struct nvm_ioctl_info))) {
|
|
kfree(info);
|
|
return -EFAULT;
|
|
}
|
|
|
|
kfree(info);
|
|
return 0;
|
|
}
|
|
|
|
static long nvm_ioctl_get_devices(struct file *file, void __user *arg)
|
|
{
|
|
struct nvm_ioctl_get_devices *devices;
|
|
struct nvm_dev *dev;
|
|
int i = 0;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
devices = kzalloc(sizeof(struct nvm_ioctl_get_devices), GFP_KERNEL);
|
|
if (!devices)
|
|
return -ENOMEM;
|
|
|
|
down_write(&nvm_lock);
|
|
list_for_each_entry(dev, &nvm_devices, devices) {
|
|
struct nvm_ioctl_device_info *info = &devices->info[i];
|
|
|
|
strlcpy(info->devname, dev->name, sizeof(info->devname));
|
|
|
|
/* kept for compatibility */
|
|
info->bmversion[0] = 1;
|
|
info->bmversion[1] = 0;
|
|
info->bmversion[2] = 0;
|
|
strlcpy(info->bmname, "gennvm", sizeof(info->bmname));
|
|
i++;
|
|
|
|
if (i > 31) {
|
|
pr_err("nvm: max 31 devices can be reported.\n");
|
|
break;
|
|
}
|
|
}
|
|
up_write(&nvm_lock);
|
|
|
|
devices->nr_devices = i;
|
|
|
|
if (copy_to_user(arg, devices,
|
|
sizeof(struct nvm_ioctl_get_devices))) {
|
|
kfree(devices);
|
|
return -EFAULT;
|
|
}
|
|
|
|
kfree(devices);
|
|
return 0;
|
|
}
|
|
|
|
static long nvm_ioctl_dev_create(struct file *file, void __user *arg)
|
|
{
|
|
struct nvm_ioctl_create create;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (copy_from_user(&create, arg, sizeof(struct nvm_ioctl_create)))
|
|
return -EFAULT;
|
|
|
|
if (create.conf.type == NVM_CONFIG_TYPE_EXTENDED &&
|
|
create.conf.e.rsv != 0) {
|
|
pr_err("nvm: reserved config field in use\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
create.dev[DISK_NAME_LEN - 1] = '\0';
|
|
create.tgttype[NVM_TTYPE_NAME_MAX - 1] = '\0';
|
|
create.tgtname[DISK_NAME_LEN - 1] = '\0';
|
|
|
|
if (create.flags != 0) {
|
|
__u32 flags = create.flags;
|
|
|
|
/* Check for valid flags */
|
|
if (flags & NVM_TARGET_FACTORY)
|
|
flags &= ~NVM_TARGET_FACTORY;
|
|
|
|
if (flags) {
|
|
pr_err("nvm: flag not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
return __nvm_configure_create(&create);
|
|
}
|
|
|
|
static long nvm_ioctl_dev_remove(struct file *file, void __user *arg)
|
|
{
|
|
struct nvm_ioctl_remove remove;
|
|
struct nvm_dev *dev;
|
|
int ret = 0;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (copy_from_user(&remove, arg, sizeof(struct nvm_ioctl_remove)))
|
|
return -EFAULT;
|
|
|
|
remove.tgtname[DISK_NAME_LEN - 1] = '\0';
|
|
|
|
if (remove.flags != 0) {
|
|
pr_err("nvm: no flags supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
list_for_each_entry(dev, &nvm_devices, devices) {
|
|
ret = nvm_remove_tgt(dev, &remove);
|
|
if (!ret)
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* kept for compatibility reasons */
|
|
static long nvm_ioctl_dev_init(struct file *file, void __user *arg)
|
|
{
|
|
struct nvm_ioctl_dev_init init;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (copy_from_user(&init, arg, sizeof(struct nvm_ioctl_dev_init)))
|
|
return -EFAULT;
|
|
|
|
if (init.flags != 0) {
|
|
pr_err("nvm: no flags supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Kept for compatibility reasons */
|
|
static long nvm_ioctl_dev_factory(struct file *file, void __user *arg)
|
|
{
|
|
struct nvm_ioctl_dev_factory fact;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (copy_from_user(&fact, arg, sizeof(struct nvm_ioctl_dev_factory)))
|
|
return -EFAULT;
|
|
|
|
fact.dev[DISK_NAME_LEN - 1] = '\0';
|
|
|
|
if (fact.flags & ~(NVM_FACTORY_NR_BITS - 1))
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static long nvm_ctl_ioctl(struct file *file, uint cmd, unsigned long arg)
|
|
{
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
switch (cmd) {
|
|
case NVM_INFO:
|
|
return nvm_ioctl_info(file, argp);
|
|
case NVM_GET_DEVICES:
|
|
return nvm_ioctl_get_devices(file, argp);
|
|
case NVM_DEV_CREATE:
|
|
return nvm_ioctl_dev_create(file, argp);
|
|
case NVM_DEV_REMOVE:
|
|
return nvm_ioctl_dev_remove(file, argp);
|
|
case NVM_DEV_INIT:
|
|
return nvm_ioctl_dev_init(file, argp);
|
|
case NVM_DEV_FACTORY:
|
|
return nvm_ioctl_dev_factory(file, argp);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const struct file_operations _ctl_fops = {
|
|
.open = nonseekable_open,
|
|
.unlocked_ioctl = nvm_ctl_ioctl,
|
|
.owner = THIS_MODULE,
|
|
.llseek = noop_llseek,
|
|
};
|
|
|
|
static struct miscdevice _nvm_misc = {
|
|
.minor = MISC_DYNAMIC_MINOR,
|
|
.name = "lightnvm",
|
|
.nodename = "lightnvm/control",
|
|
.fops = &_ctl_fops,
|
|
};
|
|
builtin_misc_device(_nvm_misc);
|