lightnvm: merge gennvm with core
For the first iteration of Open-Channel SSDs, it was anticipated that there could be various media managers on top of an open-channel SSD, such to allow vendors to plug in their own host-side FTLs, without the media manager in between. Now that an Open-Channel SSD is exposed as a traditional block device, there is no longer a need for this. Therefore lets merge the gennvm code with core and simplify the stack. Signed-off-by: Matias Bjørling <matias@cnexlabs.com> Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
parent
400f73b23f
commit
ade69e2432
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@ -26,15 +26,6 @@ config NVM_DEBUG
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It is required to create/remove targets without IOCTLs.
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config NVM_GENNVM
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tristate "General Non-Volatile Memory Manager for Open-Channel SSDs"
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---help---
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Non-volatile memory media manager for Open-Channel SSDs that implements
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physical media metadata management and block provisioning API.
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This is the standard media manager for using Open-Channel SSDs, and
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required for targets to be instantiated.
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config NVM_RRPC
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tristate "Round-robin Hybrid Open-Channel SSD target"
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---help---
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@ -2,6 +2,5 @@
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# Makefile for Open-Channel SSDs.
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#
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obj-$(CONFIG_NVM) := core.o sysblk.o
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obj-$(CONFIG_NVM_GENNVM) += gennvm.o
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obj-$(CONFIG_NVM) := core.o
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obj-$(CONFIG_NVM_RRPC) += rrpc.o
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@ -29,10 +29,492 @@
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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_mgrs);
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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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struct nvm_area {
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struct list_head list;
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sector_t begin;
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sector_t end; /* end is excluded */
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};
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enum {
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TRANS_TGT_TO_DEV = 0x0,
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TRANS_DEV_TO_TGT = 0x1,
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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 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)
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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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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.luns_per_chnl) + lun;
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WARN_ON(!test_and_clear_bit(lunid, dev->lun_map));
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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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int lun_begin, int lun_end)
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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.luns_per_chnl;
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int nr_chnls_mod = nr_luns % dev->geo.luns_per_chnl;
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int bch = lun_begin / dev->geo.luns_per_chnl;
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int blun = lun_begin % dev->geo.luns_per_chnl;
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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_luns / dev->geo.luns_per_chnl;
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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.luns_per_chnl) ?
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dev->geo.luns_per_chnl : 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.luns_per_chnl) ?
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dev->geo.luns_per_chnl : 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.nr_luns = nr_luns;
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tgt_dev->geo.luns_per_chnl = (lun_balanced) ? prev_nr_luns : -1;
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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 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_simple *s = &create->conf.s;
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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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tt = nvm_find_target_type(create->tgttype, 1);
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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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mutex_lock(&dev->mlock);
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t = nvm_find_target(dev, create->tgtname);
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if (t) {
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pr_err("nvm: target name already exists.\n");
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mutex_unlock(&dev->mlock);
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return -EINVAL;
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}
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mutex_unlock(&dev->mlock);
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if (nvm_reserve_luns(dev, s->lun_begin, s->lun_end))
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return -ENOMEM;
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t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL);
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if (!t)
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goto err_reserve;
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tgt_dev = nvm_create_tgt_dev(dev, s->lun_begin, s->lun_end);
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if (!tgt_dev) {
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pr_err("nvm: could not create target device\n");
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goto err_t;
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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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goto err_dev;
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blk_queue_make_request(tqueue, tt->make_rq);
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tdisk = alloc_disk(0);
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if (!tdisk)
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goto err_queue;
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sprintf(tdisk->disk_name, "%s", create->tgtname);
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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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targetdata = tt->init(tgt_dev, tdisk);
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if (IS_ERR(targetdata))
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goto err_init;
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tdisk->private_data = targetdata;
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tqueue->queuedata = targetdata;
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blk_queue_max_hw_sectors(tqueue, 8 * dev->ops->max_phys_sect);
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set_capacity(tdisk, tt->capacity(targetdata));
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add_disk(tdisk);
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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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return 0;
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err_init:
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put_disk(tdisk);
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err_queue:
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blk_cleanup_queue(tqueue);
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err_dev:
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kfree(tgt_dev);
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err_t:
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kfree(t);
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err_reserve:
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nvm_release_luns_err(dev, s->lun_begin, s->lun_end);
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return -ENOMEM;
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}
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static void __nvm_remove_target(struct nvm_target *t)
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{
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struct nvm_tgt_type *tt = t->type;
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struct gendisk *tdisk = t->disk;
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struct request_queue *q = tdisk->queue;
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del_gendisk(tdisk);
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blk_cleanup_queue(q);
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if (tt->exit)
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tt->exit(tdisk->private_data);
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nvm_remove_tgt_dev(t->dev);
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put_disk(tdisk);
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list_del(&t->list);
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kfree(t);
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}
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/**
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* nvm_remove_tgt - Removes a target from the media manager
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* @dev: device
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* @remove: ioctl structure with target name to remove.
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*
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* Returns:
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* 0: on success
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* 1: on not found
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* <0: on error
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*/
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static int nvm_remove_tgt(struct nvm_dev *dev, struct nvm_ioctl_remove *remove)
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{
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struct nvm_target *t;
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mutex_lock(&dev->mlock);
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t = nvm_find_target(dev, remove->tgtname);
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if (!t) {
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mutex_unlock(&dev->mlock);
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return 1;
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}
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__nvm_remove_target(t);
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mutex_unlock(&dev->mlock);
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return 0;
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}
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static int nvm_register_map(struct nvm_dev *dev)
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{
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struct nvm_dev_map *rmap;
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int i, j;
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rmap = kmalloc(sizeof(struct nvm_dev_map), GFP_KERNEL);
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if (!rmap)
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goto err_rmap;
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rmap->chnls = kcalloc(dev->geo.nr_chnls, sizeof(struct nvm_ch_map),
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GFP_KERNEL);
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if (!rmap->chnls)
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goto err_chnls;
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for (i = 0; i < dev->geo.nr_chnls; i++) {
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struct nvm_ch_map *ch_rmap;
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int *lun_roffs;
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int luns_in_chnl = dev->geo.luns_per_chnl;
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ch_rmap = &rmap->chnls[i];
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ch_rmap->ch_off = -1;
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ch_rmap->nr_luns = luns_in_chnl;
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lun_roffs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL);
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if (!lun_roffs)
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goto err_ch;
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for (j = 0; j < luns_in_chnl; j++)
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lun_roffs[j] = -1;
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ch_rmap->lun_offs = lun_roffs;
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}
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dev->rmap = rmap;
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return 0;
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err_ch:
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while (--i >= 0)
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kfree(rmap->chnls[i].lun_offs);
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err_chnls:
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kfree(rmap);
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err_rmap:
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return -ENOMEM;
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}
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static int nvm_map_to_dev(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p)
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{
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struct nvm_dev_map *dev_map = tgt_dev->map;
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struct nvm_ch_map *ch_map = &dev_map->chnls[p->g.ch];
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int lun_off = ch_map->lun_offs[p->g.lun];
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struct nvm_dev *dev = tgt_dev->parent;
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struct nvm_dev_map *dev_rmap = dev->rmap;
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struct nvm_ch_map *ch_rmap;
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int lun_roff;
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p->g.ch += ch_map->ch_off;
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p->g.lun += lun_off;
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ch_rmap = &dev_rmap->chnls[p->g.ch];
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lun_roff = ch_rmap->lun_offs[p->g.lun];
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if (unlikely(ch_rmap->ch_off < 0 || lun_roff < 0)) {
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pr_err("nvm: corrupted device partition table\n");
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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_map_to_tgt(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p)
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{
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struct nvm_dev *dev = tgt_dev->parent;
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struct nvm_dev_map *dev_rmap = dev->rmap;
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struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[p->g.ch];
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int lun_roff = ch_rmap->lun_offs[p->g.lun];
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p->g.ch -= ch_rmap->ch_off;
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p->g.lun -= lun_roff;
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return 0;
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}
|
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|
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static int nvm_trans_rq(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd,
|
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int flag)
|
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{
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int i;
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int ret;
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|
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if (rqd->nr_ppas == 1) {
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if (flag == TRANS_TGT_TO_DEV)
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return nvm_map_to_dev(tgt_dev, &rqd->ppa_addr);
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else
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return nvm_map_to_tgt(tgt_dev, &rqd->ppa_addr);
|
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}
|
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|
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for (i = 0; i < rqd->nr_ppas; i++) {
|
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if (flag == TRANS_TGT_TO_DEV)
|
||||
ret = nvm_map_to_dev(tgt_dev, &rqd->ppa_list[i]);
|
||||
else
|
||||
ret = nvm_map_to_tgt(tgt_dev, &rqd->ppa_list[i]);
|
||||
|
||||
if (ret)
|
||||
break;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static struct ppa_addr nvm_trans_ppa(struct nvm_tgt_dev *tgt_dev,
|
||||
struct ppa_addr p, int dir)
|
||||
{
|
||||
struct ppa_addr ppa = p;
|
||||
|
||||
if (dir == TRANS_TGT_TO_DEV)
|
||||
nvm_map_to_dev(tgt_dev, &ppa);
|
||||
else
|
||||
nvm_map_to_tgt(tgt_dev, &ppa);
|
||||
|
||||
return ppa;
|
||||
}
|
||||
|
||||
void nvm_part_to_tgt(struct nvm_dev *dev, sector_t *entries,
|
||||
int len)
|
||||
{
|
||||
struct nvm_geo *geo = &dev->geo;
|
||||
struct nvm_dev_map *dev_rmap = dev->rmap;
|
||||
u64 i;
|
||||
|
||||
for (i = 0; i < len; i++) {
|
||||
struct nvm_ch_map *ch_rmap;
|
||||
int *lun_roffs;
|
||||
struct ppa_addr gaddr;
|
||||
u64 pba = le64_to_cpu(entries[i]);
|
||||
int off;
|
||||
u64 diff;
|
||||
|
||||
if (!pba)
|
||||
continue;
|
||||
|
||||
gaddr = linear_to_generic_addr(geo, pba);
|
||||
ch_rmap = &dev_rmap->chnls[gaddr.g.ch];
|
||||
lun_roffs = ch_rmap->lun_offs;
|
||||
|
||||
off = gaddr.g.ch * geo->luns_per_chnl + gaddr.g.lun;
|
||||
|
||||
diff = ((ch_rmap->ch_off * geo->luns_per_chnl) +
|
||||
(lun_roffs[gaddr.g.lun])) * geo->sec_per_lun;
|
||||
|
||||
entries[i] -= cpu_to_le64(diff);
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL(nvm_part_to_tgt);
|
||||
|
||||
struct nvm_tgt_type *nvm_find_target_type(const char *name, int lock)
|
||||
{
|
||||
struct nvm_tgt_type *tmp, *tt = NULL;
|
||||
|
@ -92,78 +574,6 @@ void nvm_dev_dma_free(struct nvm_dev *dev, void *addr, dma_addr_t dma_handler)
|
|||
}
|
||||
EXPORT_SYMBOL(nvm_dev_dma_free);
|
||||
|
||||
static struct nvmm_type *nvm_find_mgr_type(const char *name)
|
||||
{
|
||||
struct nvmm_type *mt;
|
||||
|
||||
list_for_each_entry(mt, &nvm_mgrs, list)
|
||||
if (!strcmp(name, mt->name))
|
||||
return mt;
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static struct nvmm_type *nvm_init_mgr(struct nvm_dev *dev)
|
||||
{
|
||||
struct nvmm_type *mt;
|
||||
int ret;
|
||||
|
||||
lockdep_assert_held(&nvm_lock);
|
||||
|
||||
list_for_each_entry(mt, &nvm_mgrs, list) {
|
||||
if (strncmp(dev->sb.mmtype, mt->name, NVM_MMTYPE_LEN))
|
||||
continue;
|
||||
|
||||
ret = mt->register_mgr(dev);
|
||||
if (ret < 0) {
|
||||
pr_err("nvm: media mgr failed to init (%d) on dev %s\n",
|
||||
ret, dev->name);
|
||||
return NULL; /* initialization failed */
|
||||
} else if (ret > 0)
|
||||
return mt;
|
||||
}
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
int nvm_register_mgr(struct nvmm_type *mt)
|
||||
{
|
||||
struct nvm_dev *dev;
|
||||
int ret = 0;
|
||||
|
||||
down_write(&nvm_lock);
|
||||
if (nvm_find_mgr_type(mt->name)) {
|
||||
ret = -EEXIST;
|
||||
goto finish;
|
||||
} else {
|
||||
list_add(&mt->list, &nvm_mgrs);
|
||||
}
|
||||
|
||||
/* try to register media mgr if any device have none configured */
|
||||
list_for_each_entry(dev, &nvm_devices, devices) {
|
||||
if (dev->mt)
|
||||
continue;
|
||||
|
||||
dev->mt = nvm_init_mgr(dev);
|
||||
}
|
||||
finish:
|
||||
up_write(&nvm_lock);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL(nvm_register_mgr);
|
||||
|
||||
void nvm_unregister_mgr(struct nvmm_type *mt)
|
||||
{
|
||||
if (!mt)
|
||||
return;
|
||||
|
||||
down_write(&nvm_lock);
|
||||
list_del(&mt->list);
|
||||
up_write(&nvm_lock);
|
||||
}
|
||||
EXPORT_SYMBOL(nvm_unregister_mgr);
|
||||
|
||||
static struct nvm_dev *nvm_find_nvm_dev(const char *name)
|
||||
{
|
||||
struct nvm_dev *dev;
|
||||
|
@ -183,13 +593,13 @@ static void nvm_tgt_generic_to_addr_mode(struct nvm_tgt_dev *tgt_dev,
|
|||
|
||||
if (rqd->nr_ppas > 1) {
|
||||
for (i = 0; i < rqd->nr_ppas; i++) {
|
||||
rqd->ppa_list[i] = dev->mt->trans_ppa(tgt_dev,
|
||||
rqd->ppa_list[i] = nvm_trans_ppa(tgt_dev,
|
||||
rqd->ppa_list[i], TRANS_TGT_TO_DEV);
|
||||
rqd->ppa_list[i] = generic_to_dev_addr(dev,
|
||||
rqd->ppa_list[i]);
|
||||
}
|
||||
} else {
|
||||
rqd->ppa_addr = dev->mt->trans_ppa(tgt_dev, rqd->ppa_addr,
|
||||
rqd->ppa_addr = nvm_trans_ppa(tgt_dev, rqd->ppa_addr,
|
||||
TRANS_TGT_TO_DEV);
|
||||
rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr);
|
||||
}
|
||||
|
@ -242,7 +652,7 @@ int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas,
|
|||
ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type);
|
||||
nvm_free_rqd_ppalist(dev, &rqd);
|
||||
if (ret) {
|
||||
pr_err("nvm: sysblk failed bb mark\n");
|
||||
pr_err("nvm: failed bb mark\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
|
@ -262,15 +672,23 @@ int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
|
|||
{
|
||||
struct nvm_dev *dev = tgt_dev->parent;
|
||||
|
||||
return dev->mt->submit_io(tgt_dev, rqd);
|
||||
if (!dev->ops->submit_io)
|
||||
return -ENODEV;
|
||||
|
||||
/* Convert address space */
|
||||
nvm_generic_to_addr_mode(dev, rqd);
|
||||
|
||||
rqd->dev = tgt_dev;
|
||||
return dev->ops->submit_io(dev, rqd);
|
||||
}
|
||||
EXPORT_SYMBOL(nvm_submit_io);
|
||||
|
||||
int nvm_erase_blk(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p, int flags)
|
||||
{
|
||||
struct nvm_dev *dev = tgt_dev->parent;
|
||||
/* Convert address space */
|
||||
nvm_map_to_dev(tgt_dev, p);
|
||||
|
||||
return dev->mt->erase_blk(tgt_dev, p, flags);
|
||||
return nvm_erase_ppa(tgt_dev->parent, p, 1, flags);
|
||||
}
|
||||
EXPORT_SYMBOL(nvm_erase_blk);
|
||||
|
||||
|
@ -289,16 +707,65 @@ EXPORT_SYMBOL(nvm_get_l2p_tbl);
|
|||
int nvm_get_area(struct nvm_tgt_dev *tgt_dev, sector_t *lba, sector_t len)
|
||||
{
|
||||
struct nvm_dev *dev = tgt_dev->parent;
|
||||
struct nvm_geo *geo = &dev->geo;
|
||||
struct nvm_area *area, *prev, *next;
|
||||
sector_t begin = 0;
|
||||
sector_t max_sectors = (geo->sec_size * dev->total_secs) >> 9;
|
||||
|
||||
return dev->mt->get_area(dev, lba, len);
|
||||
if (len > max_sectors)
|
||||
return -EINVAL;
|
||||
|
||||
area = kmalloc(sizeof(struct nvm_area), GFP_KERNEL);
|
||||
if (!area)
|
||||
return -ENOMEM;
|
||||
|
||||
prev = NULL;
|
||||
|
||||
spin_lock(&dev->lock);
|
||||
list_for_each_entry(next, &dev->area_list, list) {
|
||||
if (begin + len > next->begin) {
|
||||
begin = next->end;
|
||||
prev = next;
|
||||
continue;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
if ((begin + len) > max_sectors) {
|
||||
spin_unlock(&dev->lock);
|
||||
kfree(area);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
area->begin = *lba = begin;
|
||||
area->end = begin + len;
|
||||
|
||||
if (prev) /* insert into sorted order */
|
||||
list_add(&area->list, &prev->list);
|
||||
else
|
||||
list_add(&area->list, &dev->area_list);
|
||||
spin_unlock(&dev->lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(nvm_get_area);
|
||||
|
||||
void nvm_put_area(struct nvm_tgt_dev *tgt_dev, sector_t lba)
|
||||
void nvm_put_area(struct nvm_tgt_dev *tgt_dev, sector_t begin)
|
||||
{
|
||||
struct nvm_dev *dev = tgt_dev->parent;
|
||||
struct nvm_area *area;
|
||||
|
||||
dev->mt->put_area(dev, lba);
|
||||
spin_lock(&dev->lock);
|
||||
list_for_each_entry(area, &dev->area_list, list) {
|
||||
if (area->begin != begin)
|
||||
continue;
|
||||
|
||||
list_del(&area->list);
|
||||
spin_unlock(&dev->lock);
|
||||
kfree(area);
|
||||
return;
|
||||
}
|
||||
spin_unlock(&dev->lock);
|
||||
}
|
||||
EXPORT_SYMBOL(nvm_put_area);
|
||||
|
||||
|
@ -409,8 +876,15 @@ EXPORT_SYMBOL(nvm_erase_ppa);
|
|||
|
||||
void nvm_end_io(struct nvm_rq *rqd, int error)
|
||||
{
|
||||
struct nvm_tgt_dev *tgt_dev = rqd->dev;
|
||||
struct nvm_tgt_instance *ins = rqd->ins;
|
||||
|
||||
/* Convert address space */
|
||||
if (tgt_dev)
|
||||
nvm_trans_rq(tgt_dev, rqd, TRANS_DEV_TO_TGT);
|
||||
|
||||
rqd->error = error;
|
||||
rqd->end_io(rqd);
|
||||
ins->tt->end_io(rqd);
|
||||
}
|
||||
EXPORT_SYMBOL(nvm_end_io);
|
||||
|
||||
|
@ -570,10 +1044,9 @@ EXPORT_SYMBOL(nvm_get_bb_tbl);
|
|||
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;
|
||||
ppa = nvm_trans_ppa(tgt_dev, ppa, TRANS_TGT_TO_DEV);
|
||||
|
||||
ppa = dev->mt->trans_ppa(tgt_dev, ppa, TRANS_TGT_TO_DEV);
|
||||
return nvm_get_bb_tbl(dev, ppa, blks);
|
||||
return nvm_get_bb_tbl(tgt_dev->parent, ppa, blks);
|
||||
}
|
||||
EXPORT_SYMBOL(nvm_get_tgt_bb_tbl);
|
||||
|
||||
|
@ -691,36 +1164,31 @@ static int nvm_core_init(struct nvm_dev *dev)
|
|||
goto err_fmtype;
|
||||
}
|
||||
|
||||
INIT_LIST_HEAD(&dev->area_list);
|
||||
INIT_LIST_HEAD(&dev->targets);
|
||||
mutex_init(&dev->mlock);
|
||||
spin_lock_init(&dev->lock);
|
||||
|
||||
blk_queue_logical_block_size(dev->q, geo->sec_size);
|
||||
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_mgr(struct nvm_dev *dev)
|
||||
{
|
||||
if (!dev->mt)
|
||||
return;
|
||||
|
||||
dev->mt->unregister_mgr(dev);
|
||||
dev->mt = NULL;
|
||||
}
|
||||
|
||||
void nvm_free(struct nvm_dev *dev)
|
||||
{
|
||||
if (!dev)
|
||||
return;
|
||||
|
||||
nvm_free_mgr(dev);
|
||||
|
||||
if (dev->dma_pool)
|
||||
dev->ops->destroy_dma_pool(dev->dma_pool);
|
||||
|
||||
kfree(dev->rmap);
|
||||
kfree(dev->lptbl);
|
||||
kfree(dev->lun_map);
|
||||
kfree(dev);
|
||||
|
@ -731,9 +1199,6 @@ static int nvm_init(struct nvm_dev *dev)
|
|||
struct nvm_geo *geo = &dev->geo;
|
||||
int ret = -EINVAL;
|
||||
|
||||
if (!dev->q || !dev->ops)
|
||||
return ret;
|
||||
|
||||
if (dev->ops->identity(dev, &dev->identity)) {
|
||||
pr_err("nvm: device could not be identified\n");
|
||||
goto err;
|
||||
|
@ -779,49 +1244,50 @@ int nvm_register(struct nvm_dev *dev)
|
|||
{
|
||||
int ret;
|
||||
|
||||
ret = nvm_init(dev);
|
||||
if (ret)
|
||||
goto err_init;
|
||||
if (!dev->q || !dev->ops)
|
||||
return -EINVAL;
|
||||
|
||||
if (dev->ops->max_phys_sect > 256) {
|
||||
pr_info("nvm: max sectors supported is 256.\n");
|
||||
ret = -EINVAL;
|
||||
goto err_init;
|
||||
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");
|
||||
ret = -ENOMEM;
|
||||
goto err_init;
|
||||
return -ENOMEM;
|
||||
}
|
||||
}
|
||||
|
||||
if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) {
|
||||
ret = nvm_get_sysblock(dev, &dev->sb);
|
||||
if (!ret)
|
||||
pr_err("nvm: device not initialized.\n");
|
||||
else if (ret < 0)
|
||||
pr_err("nvm: err (%d) on device initialization\n", ret);
|
||||
}
|
||||
ret = nvm_init(dev);
|
||||
if (ret)
|
||||
goto err_init;
|
||||
|
||||
/* register device with a supported media manager */
|
||||
down_write(&nvm_lock);
|
||||
if (ret > 0)
|
||||
dev->mt = nvm_init_mgr(dev);
|
||||
list_add(&dev->devices, &nvm_devices);
|
||||
up_write(&nvm_lock);
|
||||
|
||||
return 0;
|
||||
err_init:
|
||||
kfree(dev->lun_map);
|
||||
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);
|
||||
|
@ -844,11 +1310,6 @@ static int __nvm_configure_create(struct nvm_ioctl_create *create)
|
|||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (!dev->mt) {
|
||||
pr_info("nvm: device has no media manager registered.\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
if (create->conf.type != NVM_CONFIG_TYPE_SIMPLE) {
|
||||
pr_err("nvm: config type not valid\n");
|
||||
return -EINVAL;
|
||||
|
@ -861,7 +1322,7 @@ static int __nvm_configure_create(struct nvm_ioctl_create *create)
|
|||
return -EINVAL;
|
||||
}
|
||||
|
||||
return dev->mt->create_tgt(dev, create);
|
||||
return nvm_create_tgt(dev, create);
|
||||
}
|
||||
|
||||
static long nvm_ioctl_info(struct file *file, void __user *arg)
|
||||
|
@ -923,16 +1384,14 @@ static long nvm_ioctl_get_devices(struct file *file, void __user *arg)
|
|||
struct nvm_ioctl_device_info *info = &devices->info[i];
|
||||
|
||||
sprintf(info->devname, "%s", dev->name);
|
||||
if (dev->mt) {
|
||||
info->bmversion[0] = dev->mt->version[0];
|
||||
info->bmversion[1] = dev->mt->version[1];
|
||||
info->bmversion[2] = dev->mt->version[2];
|
||||
sprintf(info->bmname, "%s", dev->mt->name);
|
||||
} else {
|
||||
sprintf(info->bmname, "none");
|
||||
}
|
||||
|
||||
/* kept for compatibility */
|
||||
info->bmversion[0] = 1;
|
||||
info->bmversion[1] = 0;
|
||||
info->bmversion[2] = 0;
|
||||
sprintf(info->bmname, "%s", "gennvm");
|
||||
i++;
|
||||
|
||||
if (i > 31) {
|
||||
pr_err("nvm: max 31 devices can be reported.\n");
|
||||
break;
|
||||
|
@ -994,7 +1453,7 @@ static long nvm_ioctl_dev_remove(struct file *file, void __user *arg)
|
|||
}
|
||||
|
||||
list_for_each_entry(dev, &nvm_devices, devices) {
|
||||
ret = dev->mt->remove_tgt(dev, &remove);
|
||||
ret = nvm_remove_tgt(dev, &remove);
|
||||
if (!ret)
|
||||
break;
|
||||
}
|
||||
|
@ -1002,47 +1461,7 @@ static long nvm_ioctl_dev_remove(struct file *file, void __user *arg)
|
|||
return ret;
|
||||
}
|
||||
|
||||
static void nvm_setup_nvm_sb_info(struct nvm_sb_info *info)
|
||||
{
|
||||
info->seqnr = 1;
|
||||
info->erase_cnt = 0;
|
||||
info->version = 1;
|
||||
}
|
||||
|
||||
static long __nvm_ioctl_dev_init(struct nvm_ioctl_dev_init *init)
|
||||
{
|
||||
struct nvm_dev *dev;
|
||||
struct nvm_sb_info info;
|
||||
int ret;
|
||||
|
||||
down_write(&nvm_lock);
|
||||
dev = nvm_find_nvm_dev(init->dev);
|
||||
up_write(&nvm_lock);
|
||||
if (!dev) {
|
||||
pr_err("nvm: device not found\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
nvm_setup_nvm_sb_info(&info);
|
||||
|
||||
strncpy(info.mmtype, init->mmtype, NVM_MMTYPE_LEN);
|
||||
info.fs_ppa.ppa = -1;
|
||||
|
||||
if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) {
|
||||
ret = nvm_init_sysblock(dev, &info);
|
||||
if (ret)
|
||||
return ret;
|
||||
}
|
||||
|
||||
memcpy(&dev->sb, &info, sizeof(struct nvm_sb_info));
|
||||
|
||||
down_write(&nvm_lock);
|
||||
dev->mt = nvm_init_mgr(dev);
|
||||
up_write(&nvm_lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* kept for compatibility reasons */
|
||||
static long nvm_ioctl_dev_init(struct file *file, void __user *arg)
|
||||
{
|
||||
struct nvm_ioctl_dev_init init;
|
||||
|
@ -1058,15 +1477,13 @@ static long nvm_ioctl_dev_init(struct file *file, void __user *arg)
|
|||
return -EINVAL;
|
||||
}
|
||||
|
||||
init.dev[DISK_NAME_LEN - 1] = '\0';
|
||||
|
||||
return __nvm_ioctl_dev_init(&init);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Kept for compatibility reasons */
|
||||
static long nvm_ioctl_dev_factory(struct file *file, void __user *arg)
|
||||
{
|
||||
struct nvm_ioctl_dev_factory fact;
|
||||
struct nvm_dev *dev;
|
||||
|
||||
if (!capable(CAP_SYS_ADMIN))
|
||||
return -EPERM;
|
||||
|
@ -1079,19 +1496,6 @@ static long nvm_ioctl_dev_factory(struct file *file, void __user *arg)
|
|||
if (fact.flags & ~(NVM_FACTORY_NR_BITS - 1))
|
||||
return -EINVAL;
|
||||
|
||||
down_write(&nvm_lock);
|
||||
dev = nvm_find_nvm_dev(fact.dev);
|
||||
up_write(&nvm_lock);
|
||||
if (!dev) {
|
||||
pr_err("nvm: device not found\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
nvm_free_mgr(dev);
|
||||
|
||||
if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT)
|
||||
return nvm_dev_factory(dev, fact.flags);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
|
@ -1,657 +0,0 @@
|
|||
/*
|
||||
* Copyright (C) 2015 Matias Bjorling <m@bjorling.me>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License version
|
||||
* 2 as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; see the file COPYING. If not, write to
|
||||
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
|
||||
* USA.
|
||||
*
|
||||
* Implementation of a general nvm manager for Open-Channel SSDs.
|
||||
*/
|
||||
|
||||
#include "gennvm.h"
|
||||
|
||||
static struct nvm_target *gen_find_target(struct gen_dev *gn, const char *name)
|
||||
{
|
||||
struct nvm_target *tgt;
|
||||
|
||||
list_for_each_entry(tgt, &gn->targets, list)
|
||||
if (!strcmp(name, tgt->disk->disk_name))
|
||||
return tgt;
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static const struct block_device_operations gen_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
};
|
||||
|
||||
static int gen_reserve_luns(struct nvm_dev *dev, struct nvm_target *t,
|
||||
int lun_begin, int lun_end)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = lun_begin; i <= lun_end; i++) {
|
||||
if (test_and_set_bit(i, dev->lun_map)) {
|
||||
pr_err("nvm: lun %d already allocated\n", i);
|
||||
goto err;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
err:
|
||||
while (--i > lun_begin)
|
||||
clear_bit(i, dev->lun_map);
|
||||
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
static void gen_release_luns_err(struct nvm_dev *dev, int lun_begin,
|
||||
int lun_end)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = lun_begin; i <= lun_end; i++)
|
||||
WARN_ON(!test_and_clear_bit(i, dev->lun_map));
|
||||
}
|
||||
|
||||
static void gen_remove_tgt_dev(struct nvm_tgt_dev *tgt_dev)
|
||||
{
|
||||
struct nvm_dev *dev = tgt_dev->parent;
|
||||
struct gen_dev_map *dev_map = tgt_dev->map;
|
||||
int i, j;
|
||||
|
||||
for (i = 0; i < dev_map->nr_chnls; i++) {
|
||||
struct gen_ch_map *ch_map = &dev_map->chnls[i];
|
||||
int *lun_offs = ch_map->lun_offs;
|
||||
int ch = i + ch_map->ch_off;
|
||||
|
||||
for (j = 0; j < ch_map->nr_luns; j++) {
|
||||
int lun = j + lun_offs[j];
|
||||
int lunid = (ch * dev->geo.luns_per_chnl) + lun;
|
||||
|
||||
WARN_ON(!test_and_clear_bit(lunid, dev->lun_map));
|
||||
}
|
||||
|
||||
kfree(ch_map->lun_offs);
|
||||
}
|
||||
|
||||
kfree(dev_map->chnls);
|
||||
kfree(dev_map);
|
||||
kfree(tgt_dev->luns);
|
||||
kfree(tgt_dev);
|
||||
}
|
||||
|
||||
static struct nvm_tgt_dev *gen_create_tgt_dev(struct nvm_dev *dev,
|
||||
int lun_begin, int lun_end)
|
||||
{
|
||||
struct nvm_tgt_dev *tgt_dev = NULL;
|
||||
struct gen_dev_map *dev_rmap = dev->rmap;
|
||||
struct gen_dev_map *dev_map;
|
||||
struct ppa_addr *luns;
|
||||
int nr_luns = lun_end - lun_begin + 1;
|
||||
int luns_left = nr_luns;
|
||||
int nr_chnls = nr_luns / dev->geo.luns_per_chnl;
|
||||
int nr_chnls_mod = nr_luns % dev->geo.luns_per_chnl;
|
||||
int bch = lun_begin / dev->geo.luns_per_chnl;
|
||||
int blun = lun_begin % dev->geo.luns_per_chnl;
|
||||
int lunid = 0;
|
||||
int lun_balanced = 1;
|
||||
int prev_nr_luns;
|
||||
int i, j;
|
||||
|
||||
nr_chnls = nr_luns / dev->geo.luns_per_chnl;
|
||||
nr_chnls = (nr_chnls_mod == 0) ? nr_chnls : nr_chnls + 1;
|
||||
|
||||
dev_map = kmalloc(sizeof(struct gen_dev_map), GFP_KERNEL);
|
||||
if (!dev_map)
|
||||
goto err_dev;
|
||||
|
||||
dev_map->chnls = kcalloc(nr_chnls, sizeof(struct gen_ch_map),
|
||||
GFP_KERNEL);
|
||||
if (!dev_map->chnls)
|
||||
goto err_chnls;
|
||||
|
||||
luns = kcalloc(nr_luns, sizeof(struct ppa_addr), GFP_KERNEL);
|
||||
if (!luns)
|
||||
goto err_luns;
|
||||
|
||||
prev_nr_luns = (luns_left > dev->geo.luns_per_chnl) ?
|
||||
dev->geo.luns_per_chnl : luns_left;
|
||||
for (i = 0; i < nr_chnls; i++) {
|
||||
struct gen_ch_map *ch_rmap = &dev_rmap->chnls[i + bch];
|
||||
int *lun_roffs = ch_rmap->lun_offs;
|
||||
struct gen_ch_map *ch_map = &dev_map->chnls[i];
|
||||
int *lun_offs;
|
||||
int luns_in_chnl = (luns_left > dev->geo.luns_per_chnl) ?
|
||||
dev->geo.luns_per_chnl : luns_left;
|
||||
|
||||
if (lun_balanced && prev_nr_luns != luns_in_chnl)
|
||||
lun_balanced = 0;
|
||||
|
||||
ch_map->ch_off = ch_rmap->ch_off = bch;
|
||||
ch_map->nr_luns = luns_in_chnl;
|
||||
|
||||
lun_offs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL);
|
||||
if (!lun_offs)
|
||||
goto err_ch;
|
||||
|
||||
for (j = 0; j < luns_in_chnl; j++) {
|
||||
luns[lunid].ppa = 0;
|
||||
luns[lunid].g.ch = i;
|
||||
luns[lunid++].g.lun = j;
|
||||
|
||||
lun_offs[j] = blun;
|
||||
lun_roffs[j + blun] = blun;
|
||||
}
|
||||
|
||||
ch_map->lun_offs = lun_offs;
|
||||
|
||||
/* when starting a new channel, lun offset is reset */
|
||||
blun = 0;
|
||||
luns_left -= luns_in_chnl;
|
||||
}
|
||||
|
||||
dev_map->nr_chnls = nr_chnls;
|
||||
|
||||
tgt_dev = kmalloc(sizeof(struct nvm_tgt_dev), GFP_KERNEL);
|
||||
if (!tgt_dev)
|
||||
goto err_ch;
|
||||
|
||||
memcpy(&tgt_dev->geo, &dev->geo, sizeof(struct nvm_geo));
|
||||
/* Target device only owns a portion of the physical device */
|
||||
tgt_dev->geo.nr_chnls = nr_chnls;
|
||||
tgt_dev->geo.nr_luns = nr_luns;
|
||||
tgt_dev->geo.luns_per_chnl = (lun_balanced) ? prev_nr_luns : -1;
|
||||
tgt_dev->total_secs = nr_luns * tgt_dev->geo.sec_per_lun;
|
||||
tgt_dev->q = dev->q;
|
||||
tgt_dev->map = dev_map;
|
||||
tgt_dev->luns = luns;
|
||||
memcpy(&tgt_dev->identity, &dev->identity, sizeof(struct nvm_id));
|
||||
|
||||
tgt_dev->parent = dev;
|
||||
|
||||
return tgt_dev;
|
||||
err_ch:
|
||||
while (--i > 0)
|
||||
kfree(dev_map->chnls[i].lun_offs);
|
||||
kfree(luns);
|
||||
err_luns:
|
||||
kfree(dev_map->chnls);
|
||||
err_chnls:
|
||||
kfree(dev_map);
|
||||
err_dev:
|
||||
return tgt_dev;
|
||||
}
|
||||
|
||||
static int gen_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
|
||||
{
|
||||
struct gen_dev *gn = dev->mp;
|
||||
struct nvm_ioctl_create_simple *s = &create->conf.s;
|
||||
struct request_queue *tqueue;
|
||||
struct gendisk *tdisk;
|
||||
struct nvm_tgt_type *tt;
|
||||
struct nvm_target *t;
|
||||
struct nvm_tgt_dev *tgt_dev;
|
||||
void *targetdata;
|
||||
|
||||
tt = nvm_find_target_type(create->tgttype, 1);
|
||||
if (!tt) {
|
||||
pr_err("nvm: target type %s not found\n", create->tgttype);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
mutex_lock(&gn->lock);
|
||||
t = gen_find_target(gn, create->tgtname);
|
||||
if (t) {
|
||||
pr_err("nvm: target name already exists.\n");
|
||||
mutex_unlock(&gn->lock);
|
||||
return -EINVAL;
|
||||
}
|
||||
mutex_unlock(&gn->lock);
|
||||
|
||||
t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL);
|
||||
if (!t)
|
||||
return -ENOMEM;
|
||||
|
||||
if (gen_reserve_luns(dev, t, s->lun_begin, s->lun_end))
|
||||
goto err_t;
|
||||
|
||||
tgt_dev = gen_create_tgt_dev(dev, s->lun_begin, s->lun_end);
|
||||
if (!tgt_dev) {
|
||||
pr_err("nvm: could not create target device\n");
|
||||
goto err_reserve;
|
||||
}
|
||||
|
||||
tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node);
|
||||
if (!tqueue)
|
||||
goto err_dev;
|
||||
blk_queue_make_request(tqueue, tt->make_rq);
|
||||
|
||||
tdisk = alloc_disk(0);
|
||||
if (!tdisk)
|
||||
goto err_queue;
|
||||
|
||||
sprintf(tdisk->disk_name, "%s", create->tgtname);
|
||||
tdisk->flags = GENHD_FL_EXT_DEVT;
|
||||
tdisk->major = 0;
|
||||
tdisk->first_minor = 0;
|
||||
tdisk->fops = &gen_fops;
|
||||
tdisk->queue = tqueue;
|
||||
|
||||
targetdata = tt->init(tgt_dev, tdisk);
|
||||
if (IS_ERR(targetdata))
|
||||
goto err_init;
|
||||
|
||||
tdisk->private_data = targetdata;
|
||||
tqueue->queuedata = targetdata;
|
||||
|
||||
blk_queue_max_hw_sectors(tqueue, 8 * dev->ops->max_phys_sect);
|
||||
|
||||
set_capacity(tdisk, tt->capacity(targetdata));
|
||||
add_disk(tdisk);
|
||||
|
||||
t->type = tt;
|
||||
t->disk = tdisk;
|
||||
t->dev = tgt_dev;
|
||||
|
||||
mutex_lock(&gn->lock);
|
||||
list_add_tail(&t->list, &gn->targets);
|
||||
mutex_unlock(&gn->lock);
|
||||
|
||||
return 0;
|
||||
err_init:
|
||||
put_disk(tdisk);
|
||||
err_queue:
|
||||
blk_cleanup_queue(tqueue);
|
||||
err_dev:
|
||||
kfree(tgt_dev);
|
||||
err_reserve:
|
||||
gen_release_luns_err(dev, s->lun_begin, s->lun_end);
|
||||
err_t:
|
||||
kfree(t);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
static void __gen_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->exit)
|
||||
tt->exit(tdisk->private_data);
|
||||
|
||||
gen_remove_tgt_dev(t->dev);
|
||||
put_disk(tdisk);
|
||||
|
||||
list_del(&t->list);
|
||||
kfree(t);
|
||||
}
|
||||
|
||||
/**
|
||||
* gen_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 gen_remove_tgt(struct nvm_dev *dev, struct nvm_ioctl_remove *remove)
|
||||
{
|
||||
struct gen_dev *gn = dev->mp;
|
||||
struct nvm_target *t;
|
||||
|
||||
if (!gn)
|
||||
return 1;
|
||||
|
||||
mutex_lock(&gn->lock);
|
||||
t = gen_find_target(gn, remove->tgtname);
|
||||
if (!t) {
|
||||
mutex_unlock(&gn->lock);
|
||||
return 1;
|
||||
}
|
||||
__gen_remove_target(t);
|
||||
mutex_unlock(&gn->lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int gen_get_area(struct nvm_dev *dev, sector_t *lba, sector_t len)
|
||||
{
|
||||
struct nvm_geo *geo = &dev->geo;
|
||||
struct gen_dev *gn = dev->mp;
|
||||
struct gen_area *area, *prev, *next;
|
||||
sector_t begin = 0;
|
||||
sector_t max_sectors = (geo->sec_size * dev->total_secs) >> 9;
|
||||
|
||||
if (len > max_sectors)
|
||||
return -EINVAL;
|
||||
|
||||
area = kmalloc(sizeof(struct gen_area), GFP_KERNEL);
|
||||
if (!area)
|
||||
return -ENOMEM;
|
||||
|
||||
prev = NULL;
|
||||
|
||||
spin_lock(&dev->lock);
|
||||
list_for_each_entry(next, &gn->area_list, list) {
|
||||
if (begin + len > next->begin) {
|
||||
begin = next->end;
|
||||
prev = next;
|
||||
continue;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
if ((begin + len) > max_sectors) {
|
||||
spin_unlock(&dev->lock);
|
||||
kfree(area);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
area->begin = *lba = begin;
|
||||
area->end = begin + len;
|
||||
|
||||
if (prev) /* insert into sorted order */
|
||||
list_add(&area->list, &prev->list);
|
||||
else
|
||||
list_add(&area->list, &gn->area_list);
|
||||
spin_unlock(&dev->lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void gen_put_area(struct nvm_dev *dev, sector_t begin)
|
||||
{
|
||||
struct gen_dev *gn = dev->mp;
|
||||
struct gen_area *area;
|
||||
|
||||
spin_lock(&dev->lock);
|
||||
list_for_each_entry(area, &gn->area_list, list) {
|
||||
if (area->begin != begin)
|
||||
continue;
|
||||
|
||||
list_del(&area->list);
|
||||
spin_unlock(&dev->lock);
|
||||
kfree(area);
|
||||
return;
|
||||
}
|
||||
spin_unlock(&dev->lock);
|
||||
}
|
||||
|
||||
static void gen_free(struct nvm_dev *dev)
|
||||
{
|
||||
kfree(dev->mp);
|
||||
kfree(dev->rmap);
|
||||
dev->mp = NULL;
|
||||
}
|
||||
|
||||
static int gen_register(struct nvm_dev *dev)
|
||||
{
|
||||
struct gen_dev *gn;
|
||||
struct gen_dev_map *dev_rmap;
|
||||
int i, j;
|
||||
|
||||
if (!try_module_get(THIS_MODULE))
|
||||
return -ENODEV;
|
||||
|
||||
gn = kzalloc(sizeof(struct gen_dev), GFP_KERNEL);
|
||||
if (!gn)
|
||||
goto err_gn;
|
||||
|
||||
dev_rmap = kmalloc(sizeof(struct gen_dev_map), GFP_KERNEL);
|
||||
if (!dev_rmap)
|
||||
goto err_rmap;
|
||||
|
||||
dev_rmap->chnls = kcalloc(dev->geo.nr_chnls, sizeof(struct gen_ch_map),
|
||||
GFP_KERNEL);
|
||||
if (!dev_rmap->chnls)
|
||||
goto err_chnls;
|
||||
|
||||
for (i = 0; i < dev->geo.nr_chnls; i++) {
|
||||
struct gen_ch_map *ch_rmap;
|
||||
int *lun_roffs;
|
||||
int luns_in_chnl = dev->geo.luns_per_chnl;
|
||||
|
||||
ch_rmap = &dev_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;
|
||||
}
|
||||
|
||||
gn->dev = dev;
|
||||
gn->nr_luns = dev->geo.nr_luns;
|
||||
INIT_LIST_HEAD(&gn->area_list);
|
||||
mutex_init(&gn->lock);
|
||||
INIT_LIST_HEAD(&gn->targets);
|
||||
dev->mp = gn;
|
||||
dev->rmap = dev_rmap;
|
||||
|
||||
return 1;
|
||||
err_ch:
|
||||
while (--i >= 0)
|
||||
kfree(dev_rmap->chnls[i].lun_offs);
|
||||
err_chnls:
|
||||
kfree(dev_rmap);
|
||||
err_rmap:
|
||||
gen_free(dev);
|
||||
err_gn:
|
||||
module_put(THIS_MODULE);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
static void gen_unregister(struct nvm_dev *dev)
|
||||
{
|
||||
struct gen_dev *gn = dev->mp;
|
||||
struct nvm_target *t, *tmp;
|
||||
|
||||
mutex_lock(&gn->lock);
|
||||
list_for_each_entry_safe(t, tmp, &gn->targets, list) {
|
||||
if (t->dev->parent != dev)
|
||||
continue;
|
||||
__gen_remove_target(t);
|
||||
}
|
||||
mutex_unlock(&gn->lock);
|
||||
|
||||
gen_free(dev);
|
||||
module_put(THIS_MODULE);
|
||||
}
|
||||
|
||||
static int gen_map_to_dev(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p)
|
||||
{
|
||||
struct gen_dev_map *dev_map = tgt_dev->map;
|
||||
struct gen_ch_map *ch_map = &dev_map->chnls[p->g.ch];
|
||||
int lun_off = ch_map->lun_offs[p->g.lun];
|
||||
struct nvm_dev *dev = tgt_dev->parent;
|
||||
struct gen_dev_map *dev_rmap = dev->rmap;
|
||||
struct gen_ch_map *ch_rmap;
|
||||
int lun_roff;
|
||||
|
||||
p->g.ch += ch_map->ch_off;
|
||||
p->g.lun += lun_off;
|
||||
|
||||
ch_rmap = &dev_rmap->chnls[p->g.ch];
|
||||
lun_roff = ch_rmap->lun_offs[p->g.lun];
|
||||
|
||||
if (unlikely(ch_rmap->ch_off < 0 || lun_roff < 0)) {
|
||||
pr_err("nvm: corrupted device partition table\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int gen_map_to_tgt(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p)
|
||||
{
|
||||
struct nvm_dev *dev = tgt_dev->parent;
|
||||
struct gen_dev_map *dev_rmap = dev->rmap;
|
||||
struct gen_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;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int gen_trans_rq(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd,
|
||||
int flag)
|
||||
{
|
||||
gen_trans_fn *f;
|
||||
int i;
|
||||
int ret = 0;
|
||||
|
||||
f = (flag == TRANS_TGT_TO_DEV) ? gen_map_to_dev : gen_map_to_tgt;
|
||||
|
||||
if (rqd->nr_ppas == 1)
|
||||
return f(tgt_dev, &rqd->ppa_addr);
|
||||
|
||||
for (i = 0; i < rqd->nr_ppas; i++) {
|
||||
ret = f(tgt_dev, &rqd->ppa_list[i]);
|
||||
if (ret)
|
||||
goto out;
|
||||
}
|
||||
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void gen_end_io(struct nvm_rq *rqd)
|
||||
{
|
||||
struct nvm_tgt_dev *tgt_dev = rqd->dev;
|
||||
struct nvm_tgt_instance *ins = rqd->ins;
|
||||
|
||||
/* Convert address space */
|
||||
if (tgt_dev)
|
||||
gen_trans_rq(tgt_dev, rqd, TRANS_DEV_TO_TGT);
|
||||
|
||||
ins->tt->end_io(rqd);
|
||||
}
|
||||
|
||||
static int gen_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
|
||||
{
|
||||
struct nvm_dev *dev = tgt_dev->parent;
|
||||
|
||||
if (!dev->ops->submit_io)
|
||||
return -ENODEV;
|
||||
|
||||
/* Convert address space */
|
||||
gen_trans_rq(tgt_dev, rqd, TRANS_TGT_TO_DEV);
|
||||
nvm_generic_to_addr_mode(dev, rqd);
|
||||
|
||||
rqd->dev = tgt_dev;
|
||||
rqd->end_io = gen_end_io;
|
||||
return dev->ops->submit_io(dev, rqd);
|
||||
}
|
||||
|
||||
static int gen_erase_blk(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p,
|
||||
int flags)
|
||||
{
|
||||
/* Convert address space */
|
||||
gen_map_to_dev(tgt_dev, p);
|
||||
|
||||
return nvm_erase_ppa(tgt_dev->parent, p, 1, flags);
|
||||
}
|
||||
|
||||
static struct ppa_addr gen_trans_ppa(struct nvm_tgt_dev *tgt_dev,
|
||||
struct ppa_addr p, int direction)
|
||||
{
|
||||
gen_trans_fn *f;
|
||||
struct ppa_addr ppa = p;
|
||||
|
||||
f = (direction == TRANS_TGT_TO_DEV) ? gen_map_to_dev : gen_map_to_tgt;
|
||||
f(tgt_dev, &ppa);
|
||||
|
||||
return ppa;
|
||||
}
|
||||
|
||||
static void gen_part_to_tgt(struct nvm_dev *dev, sector_t *entries,
|
||||
int len)
|
||||
{
|
||||
struct nvm_geo *geo = &dev->geo;
|
||||
struct gen_dev_map *dev_rmap = dev->rmap;
|
||||
u64 i;
|
||||
|
||||
for (i = 0; i < len; i++) {
|
||||
struct gen_ch_map *ch_rmap;
|
||||
int *lun_roffs;
|
||||
struct ppa_addr gaddr;
|
||||
u64 pba = le64_to_cpu(entries[i]);
|
||||
int off;
|
||||
u64 diff;
|
||||
|
||||
if (!pba)
|
||||
continue;
|
||||
|
||||
gaddr = linear_to_generic_addr(geo, pba);
|
||||
ch_rmap = &dev_rmap->chnls[gaddr.g.ch];
|
||||
lun_roffs = ch_rmap->lun_offs;
|
||||
|
||||
off = gaddr.g.ch * geo->luns_per_chnl + gaddr.g.lun;
|
||||
|
||||
diff = ((ch_rmap->ch_off * geo->luns_per_chnl) +
|
||||
(lun_roffs[gaddr.g.lun])) * geo->sec_per_lun;
|
||||
|
||||
entries[i] -= cpu_to_le64(diff);
|
||||
}
|
||||
}
|
||||
|
||||
static struct nvmm_type gen = {
|
||||
.name = "gennvm",
|
||||
.version = {0, 1, 0},
|
||||
|
||||
.register_mgr = gen_register,
|
||||
.unregister_mgr = gen_unregister,
|
||||
|
||||
.create_tgt = gen_create_tgt,
|
||||
.remove_tgt = gen_remove_tgt,
|
||||
|
||||
.submit_io = gen_submit_io,
|
||||
.erase_blk = gen_erase_blk,
|
||||
|
||||
.get_area = gen_get_area,
|
||||
.put_area = gen_put_area,
|
||||
|
||||
.trans_ppa = gen_trans_ppa,
|
||||
.part_to_tgt = gen_part_to_tgt,
|
||||
};
|
||||
|
||||
static int __init gen_module_init(void)
|
||||
{
|
||||
return nvm_register_mgr(&gen);
|
||||
}
|
||||
|
||||
static void gen_module_exit(void)
|
||||
{
|
||||
nvm_unregister_mgr(&gen);
|
||||
}
|
||||
|
||||
module_init(gen_module_init);
|
||||
module_exit(gen_module_exit);
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_DESCRIPTION("General media manager for Open-Channel SSDs");
|
|
@ -1,62 +0,0 @@
|
|||
/*
|
||||
* Copyright: Matias Bjorling <mb@bjorling.me>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License version
|
||||
* 2 as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* General Public License for more details.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef GENNVM_H_
|
||||
#define GENNVM_H_
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/vmalloc.h>
|
||||
|
||||
#include <linux/lightnvm.h>
|
||||
|
||||
struct gen_dev {
|
||||
struct nvm_dev *dev;
|
||||
|
||||
int nr_luns;
|
||||
struct list_head area_list;
|
||||
|
||||
struct mutex lock;
|
||||
struct list_head targets;
|
||||
};
|
||||
|
||||
/* Map between virtual and physical channel and lun */
|
||||
struct gen_ch_map {
|
||||
int ch_off;
|
||||
int nr_luns;
|
||||
int *lun_offs;
|
||||
};
|
||||
|
||||
struct gen_dev_map {
|
||||
struct gen_ch_map *chnls;
|
||||
int nr_chnls;
|
||||
};
|
||||
|
||||
struct gen_area {
|
||||
struct list_head list;
|
||||
sector_t begin;
|
||||
sector_t end; /* end is excluded */
|
||||
};
|
||||
|
||||
static inline void *ch_map_to_lun_offs(struct gen_ch_map *ch_map)
|
||||
{
|
||||
return ch_map + 1;
|
||||
}
|
||||
|
||||
typedef int (gen_trans_fn)(struct nvm_tgt_dev *, struct ppa_addr *);
|
||||
|
||||
#define gen_for_each_lun(bm, lun, i) \
|
||||
for ((i) = 0, lun = &(bm)->luns[0]; \
|
||||
(i) < (bm)->nr_luns; (i)++, lun = &(bm)->luns[(i)])
|
||||
|
||||
#endif /* GENNVM_H_ */
|
|
@ -1,733 +0,0 @@
|
|||
/*
|
||||
* Copyright (C) 2015 Matias Bjorling. All rights reserved.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License version
|
||||
* 2 as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; see the file COPYING. If not, write to
|
||||
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
|
||||
* USA.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <linux/lightnvm.h>
|
||||
|
||||
#define MAX_SYSBLKS 3 /* remember to update mapping scheme on change */
|
||||
#define MAX_BLKS_PR_SYSBLK 2 /* 2 blks with 256 pages and 3000 erases
|
||||
* enables ~1.5M updates per sysblk unit
|
||||
*/
|
||||
|
||||
struct sysblk_scan {
|
||||
/* A row is a collection of flash blocks for a system block. */
|
||||
int nr_rows;
|
||||
int row;
|
||||
int act_blk[MAX_SYSBLKS];
|
||||
|
||||
int nr_ppas;
|
||||
struct ppa_addr ppas[MAX_SYSBLKS * MAX_BLKS_PR_SYSBLK];/* all sysblks */
|
||||
};
|
||||
|
||||
static inline int scan_ppa_idx(int row, int blkid)
|
||||
{
|
||||
return (row * MAX_BLKS_PR_SYSBLK) + blkid;
|
||||
}
|
||||
|
||||
static void nvm_sysblk_to_cpu(struct nvm_sb_info *info,
|
||||
struct nvm_system_block *sb)
|
||||
{
|
||||
info->seqnr = be32_to_cpu(sb->seqnr);
|
||||
info->erase_cnt = be32_to_cpu(sb->erase_cnt);
|
||||
info->version = be16_to_cpu(sb->version);
|
||||
strncpy(info->mmtype, sb->mmtype, NVM_MMTYPE_LEN);
|
||||
info->fs_ppa.ppa = be64_to_cpu(sb->fs_ppa);
|
||||
}
|
||||
|
||||
static void nvm_cpu_to_sysblk(struct nvm_system_block *sb,
|
||||
struct nvm_sb_info *info)
|
||||
{
|
||||
sb->magic = cpu_to_be32(NVM_SYSBLK_MAGIC);
|
||||
sb->seqnr = cpu_to_be32(info->seqnr);
|
||||
sb->erase_cnt = cpu_to_be32(info->erase_cnt);
|
||||
sb->version = cpu_to_be16(info->version);
|
||||
strncpy(sb->mmtype, info->mmtype, NVM_MMTYPE_LEN);
|
||||
sb->fs_ppa = cpu_to_be64(info->fs_ppa.ppa);
|
||||
}
|
||||
|
||||
static int nvm_setup_sysblks(struct nvm_dev *dev, struct ppa_addr *sysblk_ppas)
|
||||
{
|
||||
struct nvm_geo *geo = &dev->geo;
|
||||
int nr_rows = min_t(int, MAX_SYSBLKS, geo->nr_chnls);
|
||||
int i;
|
||||
|
||||
for (i = 0; i < nr_rows; i++)
|
||||
sysblk_ppas[i].ppa = 0;
|
||||
|
||||
/* if possible, place sysblk at first channel, middle channel and last
|
||||
* channel of the device. If not, create only one or two sys blocks
|
||||
*/
|
||||
switch (geo->nr_chnls) {
|
||||
case 2:
|
||||
sysblk_ppas[1].g.ch = 1;
|
||||
/* fall-through */
|
||||
case 1:
|
||||
sysblk_ppas[0].g.ch = 0;
|
||||
break;
|
||||
default:
|
||||
sysblk_ppas[0].g.ch = 0;
|
||||
sysblk_ppas[1].g.ch = geo->nr_chnls / 2;
|
||||
sysblk_ppas[2].g.ch = geo->nr_chnls - 1;
|
||||
break;
|
||||
}
|
||||
|
||||
return nr_rows;
|
||||
}
|
||||
|
||||
static void nvm_setup_sysblk_scan(struct nvm_dev *dev, struct sysblk_scan *s,
|
||||
struct ppa_addr *sysblk_ppas)
|
||||
{
|
||||
memset(s, 0, sizeof(struct sysblk_scan));
|
||||
s->nr_rows = nvm_setup_sysblks(dev, sysblk_ppas);
|
||||
}
|
||||
|
||||
static int sysblk_get_free_blks(struct nvm_dev *dev, struct ppa_addr ppa,
|
||||
u8 *blks, int nr_blks,
|
||||
struct sysblk_scan *s)
|
||||
{
|
||||
struct ppa_addr *sppa;
|
||||
int i, blkid = 0;
|
||||
|
||||
nr_blks = nvm_bb_tbl_fold(dev, blks, nr_blks);
|
||||
if (nr_blks < 0)
|
||||
return nr_blks;
|
||||
|
||||
for (i = 0; i < nr_blks; i++) {
|
||||
if (blks[i] == NVM_BLK_T_HOST)
|
||||
return -EEXIST;
|
||||
|
||||
if (blks[i] != NVM_BLK_T_FREE)
|
||||
continue;
|
||||
|
||||
sppa = &s->ppas[scan_ppa_idx(s->row, blkid)];
|
||||
sppa->g.ch = ppa.g.ch;
|
||||
sppa->g.lun = ppa.g.lun;
|
||||
sppa->g.blk = i;
|
||||
s->nr_ppas++;
|
||||
blkid++;
|
||||
|
||||
pr_debug("nvm: use (%u %u %u) as sysblk\n",
|
||||
sppa->g.ch, sppa->g.lun, sppa->g.blk);
|
||||
if (blkid > MAX_BLKS_PR_SYSBLK - 1)
|
||||
return 0;
|
||||
}
|
||||
|
||||
pr_err("nvm: sysblk failed get sysblk\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static int sysblk_get_host_blks(struct nvm_dev *dev, struct ppa_addr ppa,
|
||||
u8 *blks, int nr_blks,
|
||||
struct sysblk_scan *s)
|
||||
{
|
||||
int i, nr_sysblk = 0;
|
||||
|
||||
nr_blks = nvm_bb_tbl_fold(dev, blks, nr_blks);
|
||||
if (nr_blks < 0)
|
||||
return nr_blks;
|
||||
|
||||
for (i = 0; i < nr_blks; i++) {
|
||||
if (blks[i] != NVM_BLK_T_HOST)
|
||||
continue;
|
||||
|
||||
if (s->nr_ppas == MAX_BLKS_PR_SYSBLK * MAX_SYSBLKS) {
|
||||
pr_err("nvm: too many host blks\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
ppa.g.blk = i;
|
||||
|
||||
s->ppas[scan_ppa_idx(s->row, nr_sysblk)] = ppa;
|
||||
s->nr_ppas++;
|
||||
nr_sysblk++;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int nvm_get_all_sysblks(struct nvm_dev *dev, struct sysblk_scan *s,
|
||||
struct ppa_addr *ppas, int get_free)
|
||||
{
|
||||
struct nvm_geo *geo = &dev->geo;
|
||||
int i, nr_blks, ret = 0;
|
||||
u8 *blks;
|
||||
|
||||
s->nr_ppas = 0;
|
||||
nr_blks = geo->blks_per_lun * geo->plane_mode;
|
||||
|
||||
blks = kmalloc(nr_blks, GFP_KERNEL);
|
||||
if (!blks)
|
||||
return -ENOMEM;
|
||||
|
||||
for (i = 0; i < s->nr_rows; i++) {
|
||||
s->row = i;
|
||||
|
||||
ret = nvm_get_bb_tbl(dev, ppas[i], blks);
|
||||
if (ret) {
|
||||
pr_err("nvm: failed bb tbl for ppa (%u %u)\n",
|
||||
ppas[i].g.ch,
|
||||
ppas[i].g.blk);
|
||||
goto err_get;
|
||||
}
|
||||
|
||||
if (get_free)
|
||||
ret = sysblk_get_free_blks(dev, ppas[i], blks, nr_blks,
|
||||
s);
|
||||
else
|
||||
ret = sysblk_get_host_blks(dev, ppas[i], blks, nr_blks,
|
||||
s);
|
||||
|
||||
if (ret)
|
||||
goto err_get;
|
||||
}
|
||||
|
||||
err_get:
|
||||
kfree(blks);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* scans a block for latest sysblk.
|
||||
* Returns:
|
||||
* 0 - newer sysblk not found. PPA is updated to latest page.
|
||||
* 1 - newer sysblk found and stored in *cur. PPA is updated to
|
||||
* next valid page.
|
||||
* <0- error.
|
||||
*/
|
||||
static int nvm_scan_block(struct nvm_dev *dev, struct ppa_addr *ppa,
|
||||
struct nvm_system_block *sblk)
|
||||
{
|
||||
struct nvm_geo *geo = &dev->geo;
|
||||
struct nvm_system_block *cur;
|
||||
int pg, ret, found = 0;
|
||||
|
||||
/* the full buffer for a flash page is allocated. Only the first of it
|
||||
* contains the system block information
|
||||
*/
|
||||
cur = kmalloc(geo->pfpg_size, GFP_KERNEL);
|
||||
if (!cur)
|
||||
return -ENOMEM;
|
||||
|
||||
/* perform linear scan through the block */
|
||||
for (pg = 0; pg < dev->lps_per_blk; pg++) {
|
||||
ppa->g.pg = ppa_to_slc(dev, pg);
|
||||
|
||||
ret = nvm_submit_ppa(dev, ppa, 1, NVM_OP_PREAD, NVM_IO_SLC_MODE,
|
||||
cur, geo->pfpg_size);
|
||||
if (ret) {
|
||||
if (ret == NVM_RSP_ERR_EMPTYPAGE) {
|
||||
pr_debug("nvm: sysblk scan empty ppa (%u %u %u %u)\n",
|
||||
ppa->g.ch,
|
||||
ppa->g.lun,
|
||||
ppa->g.blk,
|
||||
ppa->g.pg);
|
||||
break;
|
||||
}
|
||||
pr_err("nvm: read failed (%x) for ppa (%u %u %u %u)",
|
||||
ret,
|
||||
ppa->g.ch,
|
||||
ppa->g.lun,
|
||||
ppa->g.blk,
|
||||
ppa->g.pg);
|
||||
break; /* if we can't read a page, continue to the
|
||||
* next blk
|
||||
*/
|
||||
}
|
||||
|
||||
if (be32_to_cpu(cur->magic) != NVM_SYSBLK_MAGIC) {
|
||||
pr_debug("nvm: scan break for ppa (%u %u %u %u)\n",
|
||||
ppa->g.ch,
|
||||
ppa->g.lun,
|
||||
ppa->g.blk,
|
||||
ppa->g.pg);
|
||||
break; /* last valid page already found */
|
||||
}
|
||||
|
||||
if (be32_to_cpu(cur->seqnr) < be32_to_cpu(sblk->seqnr))
|
||||
continue;
|
||||
|
||||
memcpy(sblk, cur, sizeof(struct nvm_system_block));
|
||||
found = 1;
|
||||
}
|
||||
|
||||
kfree(cur);
|
||||
|
||||
return found;
|
||||
}
|
||||
|
||||
static int nvm_sysblk_set_bb_tbl(struct nvm_dev *dev, struct sysblk_scan *s,
|
||||
int type)
|
||||
{
|
||||
return nvm_set_bb_tbl(dev, s->ppas, s->nr_ppas, type);
|
||||
}
|
||||
|
||||
static int nvm_write_and_verify(struct nvm_dev *dev, struct nvm_sb_info *info,
|
||||
struct sysblk_scan *s)
|
||||
{
|
||||
struct nvm_geo *geo = &dev->geo;
|
||||
struct nvm_system_block nvmsb;
|
||||
void *buf;
|
||||
int i, sect, ret = 0;
|
||||
struct ppa_addr *ppas;
|
||||
|
||||
nvm_cpu_to_sysblk(&nvmsb, info);
|
||||
|
||||
buf = kzalloc(geo->pfpg_size, GFP_KERNEL);
|
||||
if (!buf)
|
||||
return -ENOMEM;
|
||||
memcpy(buf, &nvmsb, sizeof(struct nvm_system_block));
|
||||
|
||||
ppas = kcalloc(geo->sec_per_pg, sizeof(struct ppa_addr), GFP_KERNEL);
|
||||
if (!ppas) {
|
||||
ret = -ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
|
||||
/* Write and verify */
|
||||
for (i = 0; i < s->nr_rows; i++) {
|
||||
ppas[0] = s->ppas[scan_ppa_idx(i, s->act_blk[i])];
|
||||
|
||||
pr_debug("nvm: writing sysblk to ppa (%u %u %u %u)\n",
|
||||
ppas[0].g.ch,
|
||||
ppas[0].g.lun,
|
||||
ppas[0].g.blk,
|
||||
ppas[0].g.pg);
|
||||
|
||||
/* Expand to all sectors within a flash page */
|
||||
if (geo->sec_per_pg > 1) {
|
||||
for (sect = 1; sect < geo->sec_per_pg; sect++) {
|
||||
ppas[sect].ppa = ppas[0].ppa;
|
||||
ppas[sect].g.sec = sect;
|
||||
}
|
||||
}
|
||||
|
||||
ret = nvm_submit_ppa(dev, ppas, geo->sec_per_pg, NVM_OP_PWRITE,
|
||||
NVM_IO_SLC_MODE, buf, geo->pfpg_size);
|
||||
if (ret) {
|
||||
pr_err("nvm: sysblk failed program (%u %u %u)\n",
|
||||
ppas[0].g.ch,
|
||||
ppas[0].g.lun,
|
||||
ppas[0].g.blk);
|
||||
break;
|
||||
}
|
||||
|
||||
ret = nvm_submit_ppa(dev, ppas, geo->sec_per_pg, NVM_OP_PREAD,
|
||||
NVM_IO_SLC_MODE, buf, geo->pfpg_size);
|
||||
if (ret) {
|
||||
pr_err("nvm: sysblk failed read (%u %u %u)\n",
|
||||
ppas[0].g.ch,
|
||||
ppas[0].g.lun,
|
||||
ppas[0].g.blk);
|
||||
break;
|
||||
}
|
||||
|
||||
if (memcmp(buf, &nvmsb, sizeof(struct nvm_system_block))) {
|
||||
pr_err("nvm: sysblk failed verify (%u %u %u)\n",
|
||||
ppas[0].g.ch,
|
||||
ppas[0].g.lun,
|
||||
ppas[0].g.blk);
|
||||
ret = -EINVAL;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
kfree(ppas);
|
||||
err:
|
||||
kfree(buf);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int nvm_prepare_new_sysblks(struct nvm_dev *dev, struct sysblk_scan *s)
|
||||
{
|
||||
int i, ret;
|
||||
unsigned long nxt_blk;
|
||||
struct ppa_addr *ppa;
|
||||
|
||||
for (i = 0; i < s->nr_rows; i++) {
|
||||
nxt_blk = (s->act_blk[i] + 1) % MAX_BLKS_PR_SYSBLK;
|
||||
ppa = &s->ppas[scan_ppa_idx(i, nxt_blk)];
|
||||
ppa->g.pg = ppa_to_slc(dev, 0);
|
||||
|
||||
ret = nvm_erase_ppa(dev, ppa, 1, 0);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
s->act_blk[i] = nxt_blk;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int nvm_get_sysblock(struct nvm_dev *dev, struct nvm_sb_info *info)
|
||||
{
|
||||
struct ppa_addr sysblk_ppas[MAX_SYSBLKS];
|
||||
struct sysblk_scan s;
|
||||
struct nvm_system_block *cur;
|
||||
int i, j, found = 0;
|
||||
int ret = -ENOMEM;
|
||||
|
||||
/*
|
||||
* 1. setup sysblk locations
|
||||
* 2. get bad block list
|
||||
* 3. filter on host-specific (type 3)
|
||||
* 4. iterate through all and find the highest seq nr.
|
||||
* 5. return superblock information
|
||||
*/
|
||||
|
||||
if (!dev->ops->get_bb_tbl)
|
||||
return -EINVAL;
|
||||
|
||||
nvm_setup_sysblk_scan(dev, &s, sysblk_ppas);
|
||||
|
||||
mutex_lock(&dev->mlock);
|
||||
ret = nvm_get_all_sysblks(dev, &s, sysblk_ppas, 0);
|
||||
if (ret)
|
||||
goto err_sysblk;
|
||||
|
||||
/* no sysblocks initialized */
|
||||
if (!s.nr_ppas)
|
||||
goto err_sysblk;
|
||||
|
||||
cur = kzalloc(sizeof(struct nvm_system_block), GFP_KERNEL);
|
||||
if (!cur)
|
||||
goto err_sysblk;
|
||||
|
||||
/* find the latest block across all sysblocks */
|
||||
for (i = 0; i < s.nr_rows; i++) {
|
||||
for (j = 0; j < MAX_BLKS_PR_SYSBLK; j++) {
|
||||
struct ppa_addr ppa = s.ppas[scan_ppa_idx(i, j)];
|
||||
|
||||
ret = nvm_scan_block(dev, &ppa, cur);
|
||||
if (ret > 0)
|
||||
found = 1;
|
||||
else if (ret < 0)
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
nvm_sysblk_to_cpu(info, cur);
|
||||
|
||||
kfree(cur);
|
||||
err_sysblk:
|
||||
mutex_unlock(&dev->mlock);
|
||||
|
||||
if (found)
|
||||
return 1;
|
||||
return ret;
|
||||
}
|
||||
|
||||
int nvm_update_sysblock(struct nvm_dev *dev, struct nvm_sb_info *new)
|
||||
{
|
||||
/* 1. for each latest superblock
|
||||
* 2. if room
|
||||
* a. write new flash page entry with the updated information
|
||||
* 3. if no room
|
||||
* a. find next available block on lun (linear search)
|
||||
* if none, continue to next lun
|
||||
* if none at all, report error. also report that it wasn't
|
||||
* possible to write to all superblocks.
|
||||
* c. write data to block.
|
||||
*/
|
||||
struct ppa_addr sysblk_ppas[MAX_SYSBLKS];
|
||||
struct sysblk_scan s;
|
||||
struct nvm_system_block *cur;
|
||||
int i, j, ppaidx, found = 0;
|
||||
int ret = -ENOMEM;
|
||||
|
||||
if (!dev->ops->get_bb_tbl)
|
||||
return -EINVAL;
|
||||
|
||||
nvm_setup_sysblk_scan(dev, &s, sysblk_ppas);
|
||||
|
||||
mutex_lock(&dev->mlock);
|
||||
ret = nvm_get_all_sysblks(dev, &s, sysblk_ppas, 0);
|
||||
if (ret)
|
||||
goto err_sysblk;
|
||||
|
||||
cur = kzalloc(sizeof(struct nvm_system_block), GFP_KERNEL);
|
||||
if (!cur)
|
||||
goto err_sysblk;
|
||||
|
||||
/* Get the latest sysblk for each sysblk row */
|
||||
for (i = 0; i < s.nr_rows; i++) {
|
||||
found = 0;
|
||||
for (j = 0; j < MAX_BLKS_PR_SYSBLK; j++) {
|
||||
ppaidx = scan_ppa_idx(i, j);
|
||||
ret = nvm_scan_block(dev, &s.ppas[ppaidx], cur);
|
||||
if (ret > 0) {
|
||||
s.act_blk[i] = j;
|
||||
found = 1;
|
||||
} else if (ret < 0)
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (!found) {
|
||||
pr_err("nvm: no valid sysblks found to update\n");
|
||||
ret = -EINVAL;
|
||||
goto err_cur;
|
||||
}
|
||||
|
||||
/*
|
||||
* All sysblocks found. Check that they have same page id in their flash
|
||||
* blocks
|
||||
*/
|
||||
for (i = 1; i < s.nr_rows; i++) {
|
||||
struct ppa_addr l = s.ppas[scan_ppa_idx(0, s.act_blk[0])];
|
||||
struct ppa_addr r = s.ppas[scan_ppa_idx(i, s.act_blk[i])];
|
||||
|
||||
if (l.g.pg != r.g.pg) {
|
||||
pr_err("nvm: sysblks not on same page. Previous update failed.\n");
|
||||
ret = -EINVAL;
|
||||
goto err_cur;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Check that there haven't been another update to the seqnr since we
|
||||
* began
|
||||
*/
|
||||
if ((new->seqnr - 1) != be32_to_cpu(cur->seqnr)) {
|
||||
pr_err("nvm: seq is not sequential\n");
|
||||
ret = -EINVAL;
|
||||
goto err_cur;
|
||||
}
|
||||
|
||||
/*
|
||||
* When all pages in a block has been written, a new block is selected
|
||||
* and writing is performed on the new block.
|
||||
*/
|
||||
if (s.ppas[scan_ppa_idx(0, s.act_blk[0])].g.pg ==
|
||||
dev->lps_per_blk - 1) {
|
||||
ret = nvm_prepare_new_sysblks(dev, &s);
|
||||
if (ret)
|
||||
goto err_cur;
|
||||
}
|
||||
|
||||
ret = nvm_write_and_verify(dev, new, &s);
|
||||
err_cur:
|
||||
kfree(cur);
|
||||
err_sysblk:
|
||||
mutex_unlock(&dev->mlock);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
int nvm_init_sysblock(struct nvm_dev *dev, struct nvm_sb_info *info)
|
||||
{
|
||||
struct nvm_geo *geo = &dev->geo;
|
||||
struct ppa_addr sysblk_ppas[MAX_SYSBLKS];
|
||||
struct sysblk_scan s;
|
||||
int ret;
|
||||
|
||||
/*
|
||||
* 1. select master blocks and select first available blks
|
||||
* 2. get bad block list
|
||||
* 3. mark MAX_SYSBLKS block as host-based device allocated.
|
||||
* 4. write and verify data to block
|
||||
*/
|
||||
|
||||
if (!dev->ops->get_bb_tbl || !dev->ops->set_bb_tbl)
|
||||
return -EINVAL;
|
||||
|
||||
if (!(geo->mccap & NVM_ID_CAP_SLC) || !dev->lps_per_blk) {
|
||||
pr_err("nvm: memory does not support SLC access\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* Index all sysblocks and mark them as host-driven */
|
||||
nvm_setup_sysblk_scan(dev, &s, sysblk_ppas);
|
||||
|
||||
mutex_lock(&dev->mlock);
|
||||
ret = nvm_get_all_sysblks(dev, &s, sysblk_ppas, 1);
|
||||
if (ret)
|
||||
goto err_mark;
|
||||
|
||||
ret = nvm_sysblk_set_bb_tbl(dev, &s, NVM_BLK_T_HOST);
|
||||
if (ret)
|
||||
goto err_mark;
|
||||
|
||||
/* Write to the first block of each row */
|
||||
ret = nvm_write_and_verify(dev, info, &s);
|
||||
err_mark:
|
||||
mutex_unlock(&dev->mlock);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int factory_nblks(int nblks)
|
||||
{
|
||||
/* Round up to nearest BITS_PER_LONG */
|
||||
return (nblks + (BITS_PER_LONG - 1)) & ~(BITS_PER_LONG - 1);
|
||||
}
|
||||
|
||||
static unsigned int factory_blk_offset(struct nvm_geo *geo, struct ppa_addr ppa)
|
||||
{
|
||||
int nblks = factory_nblks(geo->blks_per_lun);
|
||||
|
||||
return ((ppa.g.ch * geo->luns_per_chnl * nblks) + (ppa.g.lun * nblks)) /
|
||||
BITS_PER_LONG;
|
||||
}
|
||||
|
||||
static int nvm_factory_blks(struct nvm_dev *dev, struct ppa_addr ppa,
|
||||
u8 *blks, int nr_blks,
|
||||
unsigned long *blk_bitmap, int flags)
|
||||
{
|
||||
int i, lunoff;
|
||||
|
||||
nr_blks = nvm_bb_tbl_fold(dev, blks, nr_blks);
|
||||
if (nr_blks < 0)
|
||||
return nr_blks;
|
||||
|
||||
lunoff = factory_blk_offset(&dev->geo, ppa);
|
||||
|
||||
/* non-set bits correspond to the block must be erased */
|
||||
for (i = 0; i < nr_blks; i++) {
|
||||
switch (blks[i]) {
|
||||
case NVM_BLK_T_FREE:
|
||||
if (flags & NVM_FACTORY_ERASE_ONLY_USER)
|
||||
set_bit(i, &blk_bitmap[lunoff]);
|
||||
break;
|
||||
case NVM_BLK_T_HOST:
|
||||
if (!(flags & NVM_FACTORY_RESET_HOST_BLKS))
|
||||
set_bit(i, &blk_bitmap[lunoff]);
|
||||
break;
|
||||
case NVM_BLK_T_GRWN_BAD:
|
||||
if (!(flags & NVM_FACTORY_RESET_GRWN_BBLKS))
|
||||
set_bit(i, &blk_bitmap[lunoff]);
|
||||
break;
|
||||
default:
|
||||
set_bit(i, &blk_bitmap[lunoff]);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int nvm_fact_get_blks(struct nvm_dev *dev, struct ppa_addr *erase_list,
|
||||
int max_ppas, unsigned long *blk_bitmap)
|
||||
{
|
||||
struct nvm_geo *geo = &dev->geo;
|
||||
struct ppa_addr ppa;
|
||||
int ch, lun, blkid, idx, done = 0, ppa_cnt = 0;
|
||||
unsigned long *offset;
|
||||
|
||||
while (!done) {
|
||||
done = 1;
|
||||
nvm_for_each_lun_ppa(geo, ppa, ch, lun) {
|
||||
idx = factory_blk_offset(geo, ppa);
|
||||
offset = &blk_bitmap[idx];
|
||||
|
||||
blkid = find_first_zero_bit(offset, geo->blks_per_lun);
|
||||
if (blkid >= geo->blks_per_lun)
|
||||
continue;
|
||||
set_bit(blkid, offset);
|
||||
|
||||
ppa.g.blk = blkid;
|
||||
pr_debug("nvm: erase ppa (%u %u %u)\n",
|
||||
ppa.g.ch,
|
||||
ppa.g.lun,
|
||||
ppa.g.blk);
|
||||
|
||||
erase_list[ppa_cnt] = ppa;
|
||||
ppa_cnt++;
|
||||
done = 0;
|
||||
|
||||
if (ppa_cnt == max_ppas)
|
||||
return ppa_cnt;
|
||||
}
|
||||
}
|
||||
|
||||
return ppa_cnt;
|
||||
}
|
||||
|
||||
static int nvm_fact_select_blks(struct nvm_dev *dev, unsigned long *blk_bitmap,
|
||||
int flags)
|
||||
{
|
||||
struct nvm_geo *geo = &dev->geo;
|
||||
struct ppa_addr ppa;
|
||||
int ch, lun, nr_blks, ret = 0;
|
||||
u8 *blks;
|
||||
|
||||
nr_blks = geo->blks_per_lun * geo->plane_mode;
|
||||
blks = kmalloc(nr_blks, GFP_KERNEL);
|
||||
if (!blks)
|
||||
return -ENOMEM;
|
||||
|
||||
nvm_for_each_lun_ppa(geo, ppa, ch, lun) {
|
||||
ret = nvm_get_bb_tbl(dev, ppa, blks);
|
||||
if (ret)
|
||||
pr_err("nvm: failed bb tbl for ch%u lun%u\n",
|
||||
ppa.g.ch, ppa.g.blk);
|
||||
|
||||
ret = nvm_factory_blks(dev, ppa, blks, nr_blks, blk_bitmap,
|
||||
flags);
|
||||
if (ret)
|
||||
break;
|
||||
}
|
||||
|
||||
kfree(blks);
|
||||
return ret;
|
||||
}
|
||||
|
||||
int nvm_dev_factory(struct nvm_dev *dev, int flags)
|
||||
{
|
||||
struct nvm_geo *geo = &dev->geo;
|
||||
struct ppa_addr *ppas;
|
||||
int ppa_cnt, ret = -ENOMEM;
|
||||
int max_ppas = dev->ops->max_phys_sect / geo->nr_planes;
|
||||
struct ppa_addr sysblk_ppas[MAX_SYSBLKS];
|
||||
struct sysblk_scan s;
|
||||
unsigned long *blk_bitmap;
|
||||
|
||||
blk_bitmap = kzalloc(factory_nblks(geo->blks_per_lun) * geo->nr_luns,
|
||||
GFP_KERNEL);
|
||||
if (!blk_bitmap)
|
||||
return ret;
|
||||
|
||||
ppas = kcalloc(max_ppas, sizeof(struct ppa_addr), GFP_KERNEL);
|
||||
if (!ppas)
|
||||
goto err_blks;
|
||||
|
||||
/* create list of blks to be erased */
|
||||
ret = nvm_fact_select_blks(dev, blk_bitmap, flags);
|
||||
if (ret)
|
||||
goto err_ppas;
|
||||
|
||||
/* continue to erase until list of blks until empty */
|
||||
while ((ppa_cnt =
|
||||
nvm_fact_get_blks(dev, ppas, max_ppas, blk_bitmap)) > 0)
|
||||
nvm_erase_ppa(dev, ppas, ppa_cnt, 0);
|
||||
|
||||
/* mark host reserved blocks free */
|
||||
if (flags & NVM_FACTORY_RESET_HOST_BLKS) {
|
||||
nvm_setup_sysblk_scan(dev, &s, sysblk_ppas);
|
||||
mutex_lock(&dev->mlock);
|
||||
ret = nvm_get_all_sysblks(dev, &s, sysblk_ppas, 0);
|
||||
if (!ret)
|
||||
ret = nvm_sysblk_set_bb_tbl(dev, &s, NVM_BLK_T_FREE);
|
||||
mutex_unlock(&dev->mlock);
|
||||
}
|
||||
err_ppas:
|
||||
kfree(ppas);
|
||||
err_blks:
|
||||
kfree(blk_bitmap);
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL(nvm_dev_factory);
|
|
@ -372,7 +372,7 @@ static int nvme_nvm_get_l2p_tbl(struct nvm_dev *nvmdev, u64 slba, u32 nlb,
|
|||
}
|
||||
|
||||
/* Transform physical address to target address space */
|
||||
nvmdev->mt->part_to_tgt(nvmdev, entries, cmd_nlb);
|
||||
nvm_part_to_tgt(nvmdev, entries, cmd_nlb);
|
||||
|
||||
if (update_l2p(cmd_slba, cmd_nlb, entries, priv)) {
|
||||
ret = -EINTR;
|
||||
|
@ -633,10 +633,9 @@ static ssize_t nvm_dev_attr_show(struct device *dev,
|
|||
return scnprintf(page, PAGE_SIZE, "%u\n", id->cap);
|
||||
} else if (strcmp(attr->name, "device_mode") == 0) {
|
||||
return scnprintf(page, PAGE_SIZE, "%u\n", id->dom);
|
||||
/* kept for compatibility */
|
||||
} else if (strcmp(attr->name, "media_manager") == 0) {
|
||||
if (!ndev->mt)
|
||||
return scnprintf(page, PAGE_SIZE, "%s\n", "none");
|
||||
return scnprintf(page, PAGE_SIZE, "%s\n", ndev->mt->name);
|
||||
return scnprintf(page, PAGE_SIZE, "%s\n", "gennvm");
|
||||
} else if (strcmp(attr->name, "ppa_format") == 0) {
|
||||
return scnprintf(page, PAGE_SIZE,
|
||||
"0x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
|
||||
|
|
|
@ -80,8 +80,6 @@ struct nvm_dev_ops {
|
|||
unsigned int max_phys_sect;
|
||||
};
|
||||
|
||||
|
||||
|
||||
#ifdef CONFIG_NVM
|
||||
|
||||
#include <linux/blkdev.h>
|
||||
|
@ -272,15 +270,6 @@ enum {
|
|||
NVM_BLK_ST_BAD = 0x8, /* Bad block */
|
||||
};
|
||||
|
||||
/* system block cpu representation */
|
||||
struct nvm_sb_info {
|
||||
unsigned long seqnr;
|
||||
unsigned long erase_cnt;
|
||||
unsigned int version;
|
||||
char mmtype[NVM_MMTYPE_LEN];
|
||||
struct ppa_addr fs_ppa;
|
||||
};
|
||||
|
||||
/* Device generic information */
|
||||
struct nvm_geo {
|
||||
int nr_chnls;
|
||||
|
@ -308,6 +297,7 @@ struct nvm_geo {
|
|||
int sec_per_lun;
|
||||
};
|
||||
|
||||
/* sub-device structure */
|
||||
struct nvm_tgt_dev {
|
||||
/* Device information */
|
||||
struct nvm_geo geo;
|
||||
|
@ -329,17 +319,10 @@ struct nvm_dev {
|
|||
|
||||
struct list_head devices;
|
||||
|
||||
/* Media manager */
|
||||
struct nvmm_type *mt;
|
||||
void *mp;
|
||||
|
||||
/* System blocks */
|
||||
struct nvm_sb_info sb;
|
||||
|
||||
/* Device information */
|
||||
struct nvm_geo geo;
|
||||
|
||||
/* lower page table */
|
||||
/* lower page table */
|
||||
int lps_per_blk;
|
||||
int *lptbl;
|
||||
|
||||
|
@ -359,6 +342,10 @@ struct nvm_dev {
|
|||
|
||||
struct mutex mlock;
|
||||
spinlock_t lock;
|
||||
|
||||
/* target management */
|
||||
struct list_head area_list;
|
||||
struct list_head targets;
|
||||
};
|
||||
|
||||
static inline struct ppa_addr linear_to_generic_addr(struct nvm_geo *geo,
|
||||
|
@ -452,11 +439,6 @@ static inline int ppa_cmp_blk(struct ppa_addr ppa1, struct ppa_addr ppa2)
|
|||
(ppa1.g.blk == ppa2.g.blk));
|
||||
}
|
||||
|
||||
static inline int ppa_to_slc(struct nvm_dev *dev, int slc_pg)
|
||||
{
|
||||
return dev->lptbl[slc_pg];
|
||||
}
|
||||
|
||||
typedef blk_qc_t (nvm_tgt_make_rq_fn)(struct request_queue *, struct bio *);
|
||||
typedef sector_t (nvm_tgt_capacity_fn)(void *);
|
||||
typedef void *(nvm_tgt_init_fn)(struct nvm_tgt_dev *, struct gendisk *);
|
||||
|
@ -487,49 +469,6 @@ extern void nvm_unregister_tgt_type(struct nvm_tgt_type *);
|
|||
extern void *nvm_dev_dma_alloc(struct nvm_dev *, gfp_t, dma_addr_t *);
|
||||
extern void nvm_dev_dma_free(struct nvm_dev *, void *, dma_addr_t);
|
||||
|
||||
typedef int (nvmm_register_fn)(struct nvm_dev *);
|
||||
typedef void (nvmm_unregister_fn)(struct nvm_dev *);
|
||||
|
||||
typedef int (nvmm_create_tgt_fn)(struct nvm_dev *, struct nvm_ioctl_create *);
|
||||
typedef int (nvmm_remove_tgt_fn)(struct nvm_dev *, struct nvm_ioctl_remove *);
|
||||
typedef int (nvmm_submit_io_fn)(struct nvm_tgt_dev *, struct nvm_rq *);
|
||||
typedef int (nvmm_erase_blk_fn)(struct nvm_tgt_dev *, struct ppa_addr *, int);
|
||||
typedef int (nvmm_get_area_fn)(struct nvm_dev *, sector_t *, sector_t);
|
||||
typedef void (nvmm_put_area_fn)(struct nvm_dev *, sector_t);
|
||||
typedef struct ppa_addr (nvmm_trans_ppa_fn)(struct nvm_tgt_dev *,
|
||||
struct ppa_addr, int);
|
||||
typedef void (nvmm_part_to_tgt_fn)(struct nvm_dev *, sector_t*, int);
|
||||
|
||||
enum {
|
||||
TRANS_TGT_TO_DEV = 0x0,
|
||||
TRANS_DEV_TO_TGT = 0x1,
|
||||
};
|
||||
|
||||
struct nvmm_type {
|
||||
const char *name;
|
||||
unsigned int version[3];
|
||||
|
||||
nvmm_register_fn *register_mgr;
|
||||
nvmm_unregister_fn *unregister_mgr;
|
||||
|
||||
nvmm_create_tgt_fn *create_tgt;
|
||||
nvmm_remove_tgt_fn *remove_tgt;
|
||||
|
||||
nvmm_submit_io_fn *submit_io;
|
||||
nvmm_erase_blk_fn *erase_blk;
|
||||
|
||||
nvmm_get_area_fn *get_area;
|
||||
nvmm_put_area_fn *put_area;
|
||||
|
||||
nvmm_trans_ppa_fn *trans_ppa;
|
||||
nvmm_part_to_tgt_fn *part_to_tgt;
|
||||
|
||||
struct list_head list;
|
||||
};
|
||||
|
||||
extern int nvm_register_mgr(struct nvmm_type *);
|
||||
extern void nvm_unregister_mgr(struct nvmm_type *);
|
||||
|
||||
extern struct nvm_dev *nvm_alloc_dev(int);
|
||||
extern int nvm_register(struct nvm_dev *);
|
||||
extern void nvm_unregister(struct nvm_dev *);
|
||||
|
@ -559,31 +498,9 @@ extern int nvm_bb_tbl_fold(struct nvm_dev *, u8 *, int);
|
|||
extern int nvm_get_bb_tbl(struct nvm_dev *, struct ppa_addr, u8 *);
|
||||
extern int nvm_get_tgt_bb_tbl(struct nvm_tgt_dev *, struct ppa_addr, u8 *);
|
||||
|
||||
/* sysblk.c */
|
||||
#define NVM_SYSBLK_MAGIC 0x4E564D53 /* "NVMS" */
|
||||
|
||||
/* system block on disk representation */
|
||||
struct nvm_system_block {
|
||||
__be32 magic; /* magic signature */
|
||||
__be32 seqnr; /* sequence number */
|
||||
__be32 erase_cnt; /* erase count */
|
||||
__be16 version; /* version number */
|
||||
u8 mmtype[NVM_MMTYPE_LEN]; /* media manager name */
|
||||
__be64 fs_ppa; /* PPA for media manager
|
||||
* superblock */
|
||||
};
|
||||
|
||||
extern int nvm_get_sysblock(struct nvm_dev *, struct nvm_sb_info *);
|
||||
extern int nvm_update_sysblock(struct nvm_dev *, struct nvm_sb_info *);
|
||||
extern int nvm_init_sysblock(struct nvm_dev *, struct nvm_sb_info *);
|
||||
|
||||
extern int nvm_dev_factory(struct nvm_dev *, int flags);
|
||||
|
||||
#define nvm_for_each_lun_ppa(geo, ppa, chid, lunid) \
|
||||
for ((chid) = 0, (ppa).ppa = 0; (chid) < (geo)->nr_chnls; \
|
||||
(chid)++, (ppa).g.ch = (chid)) \
|
||||
for ((lunid) = 0; (lunid) < (geo)->luns_per_chnl; \
|
||||
(lunid)++, (ppa).g.lun = (lunid))
|
||||
extern void nvm_part_to_tgt(struct nvm_dev *, sector_t *, int);
|
||||
|
||||
#else /* CONFIG_NVM */
|
||||
struct nvm_dev_ops;
|
||||
|
|
Loading…
Reference in New Issue