ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/drivers/lightnvm/core.c b/marvell/linux/drivers/lightnvm/core.c
new file mode 100644
index 0000000..4714aa9
--- /dev/null
+++ b/marvell/linux/drivers/lightnvm/core.c
@@ -0,0 +1,1457 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2015 IT University of Copenhagen. All rights reserved.
+ * Initial release: Matias Bjorling <m@bjorling.me>
+ */
+
+#define pr_fmt(fmt) "nvm: " fmt
+
+#include <linux/list.h>
+#include <linux/types.h>
+#include <linux/sem.h>
+#include <linux/bitmap.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/miscdevice.h>
+#include <linux/lightnvm.h>
+#include <linux/sched/sysctl.h>
+
+static LIST_HEAD(nvm_tgt_types);
+static DECLARE_RWSEM(nvm_tgtt_lock);
+static LIST_HEAD(nvm_devices);
+static DECLARE_RWSEM(nvm_lock);
+
+/* Map between virtual and physical channel and lun */
+struct nvm_ch_map {
+ int ch_off;
+ int num_lun;
+ int *lun_offs;
+};
+
+struct nvm_dev_map {
+ struct nvm_ch_map *chnls;
+ int num_ch;
+};
+
+static void nvm_free(struct kref *ref);
+
+static struct nvm_target *nvm_find_target(struct nvm_dev *dev, const char *name)
+{
+ struct nvm_target *tgt;
+
+ list_for_each_entry(tgt, &dev->targets, list)
+ if (!strcmp(name, tgt->disk->disk_name))
+ return tgt;
+
+ return NULL;
+}
+
+static bool nvm_target_exists(const char *name)
+{
+ struct nvm_dev *dev;
+ struct nvm_target *tgt;
+ bool ret = false;
+
+ down_write(&nvm_lock);
+ list_for_each_entry(dev, &nvm_devices, devices) {
+ mutex_lock(&dev->mlock);
+ list_for_each_entry(tgt, &dev->targets, list) {
+ if (!strcmp(name, tgt->disk->disk_name)) {
+ ret = true;
+ mutex_unlock(&dev->mlock);
+ goto out;
+ }
+ }
+ mutex_unlock(&dev->mlock);
+ }
+
+out:
+ up_write(&nvm_lock);
+ return ret;
+}
+
+static int nvm_reserve_luns(struct nvm_dev *dev, 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("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 nvm_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 nvm_remove_tgt_dev(struct nvm_tgt_dev *tgt_dev, int clear)
+{
+ struct nvm_dev *dev = tgt_dev->parent;
+ struct nvm_dev_map *dev_map = tgt_dev->map;
+ int i, j;
+
+ for (i = 0; i < dev_map->num_ch; i++) {
+ struct nvm_ch_map *ch_map = &dev_map->chnls[i];
+ int *lun_offs = ch_map->lun_offs;
+ int ch = i + ch_map->ch_off;
+
+ if (clear) {
+ for (j = 0; j < ch_map->num_lun; j++) {
+ int lun = j + lun_offs[j];
+ int lunid = (ch * dev->geo.num_lun) + 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 *nvm_create_tgt_dev(struct nvm_dev *dev,
+ u16 lun_begin, u16 lun_end,
+ u16 op)
+{
+ struct nvm_tgt_dev *tgt_dev = NULL;
+ struct nvm_dev_map *dev_rmap = dev->rmap;
+ struct nvm_dev_map *dev_map;
+ struct ppa_addr *luns;
+ int num_lun = lun_end - lun_begin + 1;
+ int luns_left = num_lun;
+ int num_ch = num_lun / dev->geo.num_lun;
+ int num_ch_mod = num_lun % dev->geo.num_lun;
+ int bch = lun_begin / dev->geo.num_lun;
+ int blun = lun_begin % dev->geo.num_lun;
+ int lunid = 0;
+ int lun_balanced = 1;
+ int sec_per_lun, prev_num_lun;
+ int i, j;
+
+ num_ch = (num_ch_mod == 0) ? num_ch : num_ch + 1;
+
+ dev_map = kmalloc(sizeof(struct nvm_dev_map), GFP_KERNEL);
+ if (!dev_map)
+ goto err_dev;
+
+ dev_map->chnls = kcalloc(num_ch, sizeof(struct nvm_ch_map), GFP_KERNEL);
+ if (!dev_map->chnls)
+ goto err_chnls;
+
+ luns = kcalloc(num_lun, sizeof(struct ppa_addr), GFP_KERNEL);
+ if (!luns)
+ goto err_luns;
+
+ prev_num_lun = (luns_left > dev->geo.num_lun) ?
+ dev->geo.num_lun : luns_left;
+ for (i = 0; i < num_ch; i++) {
+ struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[i + bch];
+ int *lun_roffs = ch_rmap->lun_offs;
+ struct nvm_ch_map *ch_map = &dev_map->chnls[i];
+ int *lun_offs;
+ int luns_in_chnl = (luns_left > dev->geo.num_lun) ?
+ dev->geo.num_lun : luns_left;
+
+ if (lun_balanced && prev_num_lun != luns_in_chnl)
+ lun_balanced = 0;
+
+ ch_map->ch_off = ch_rmap->ch_off = bch;
+ ch_map->num_lun = 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].a.ch = i;
+ luns[lunid++].a.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->num_ch = num_ch;
+
+ tgt_dev = kmalloc(sizeof(struct nvm_tgt_dev), GFP_KERNEL);
+ if (!tgt_dev)
+ goto err_ch;
+
+ /* Inherit device geometry from parent */
+ memcpy(&tgt_dev->geo, &dev->geo, sizeof(struct nvm_geo));
+
+ /* Target device only owns a portion of the physical device */
+ tgt_dev->geo.num_ch = num_ch;
+ tgt_dev->geo.num_lun = (lun_balanced) ? prev_num_lun : -1;
+ tgt_dev->geo.all_luns = num_lun;
+ tgt_dev->geo.all_chunks = num_lun * dev->geo.num_chk;
+
+ tgt_dev->geo.op = op;
+
+ sec_per_lun = dev->geo.clba * dev->geo.num_chk;
+ tgt_dev->geo.total_secs = num_lun * sec_per_lun;
+
+ tgt_dev->q = dev->q;
+ tgt_dev->map = dev_map;
+ tgt_dev->luns = luns;
+ 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 const struct block_device_operations nvm_fops = {
+ .owner = THIS_MODULE,
+};
+
+static struct nvm_tgt_type *__nvm_find_target_type(const char *name)
+{
+ struct nvm_tgt_type *tt;
+
+ list_for_each_entry(tt, &nvm_tgt_types, list)
+ if (!strcmp(name, tt->name))
+ return tt;
+
+ return NULL;
+}
+
+static struct nvm_tgt_type *nvm_find_target_type(const char *name)
+{
+ struct nvm_tgt_type *tt;
+
+ down_write(&nvm_tgtt_lock);
+ tt = __nvm_find_target_type(name);
+ up_write(&nvm_tgtt_lock);
+
+ return tt;
+}
+
+static int nvm_config_check_luns(struct nvm_geo *geo, int lun_begin,
+ int lun_end)
+{
+ if (lun_begin > lun_end || lun_end >= geo->all_luns) {
+ pr_err("lun out of bound (%u:%u > %u)\n",
+ lun_begin, lun_end, geo->all_luns - 1);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int __nvm_config_simple(struct nvm_dev *dev,
+ struct nvm_ioctl_create_simple *s)
+{
+ struct nvm_geo *geo = &dev->geo;
+
+ if (s->lun_begin == -1 && s->lun_end == -1) {
+ s->lun_begin = 0;
+ s->lun_end = geo->all_luns - 1;
+ }
+
+ return nvm_config_check_luns(geo, s->lun_begin, s->lun_end);
+}
+
+static int __nvm_config_extended(struct nvm_dev *dev,
+ struct nvm_ioctl_create_extended *e)
+{
+ if (e->lun_begin == 0xFFFF && e->lun_end == 0xFFFF) {
+ e->lun_begin = 0;
+ e->lun_end = dev->geo.all_luns - 1;
+ }
+
+ /* op not set falls into target's default */
+ if (e->op == 0xFFFF) {
+ e->op = NVM_TARGET_DEFAULT_OP;
+ } else if (e->op < NVM_TARGET_MIN_OP || e->op > NVM_TARGET_MAX_OP) {
+ pr_err("invalid over provisioning value\n");
+ return -EINVAL;
+ }
+
+ return nvm_config_check_luns(&dev->geo, e->lun_begin, e->lun_end);
+}
+
+static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
+{
+ struct nvm_ioctl_create_extended e;
+ struct request_queue *tqueue;
+ struct gendisk *tdisk;
+ struct nvm_tgt_type *tt;
+ struct nvm_target *t;
+ struct nvm_tgt_dev *tgt_dev;
+ void *targetdata;
+ unsigned int mdts;
+ int ret;
+
+ switch (create->conf.type) {
+ case NVM_CONFIG_TYPE_SIMPLE:
+ ret = __nvm_config_simple(dev, &create->conf.s);
+ if (ret)
+ return ret;
+
+ e.lun_begin = create->conf.s.lun_begin;
+ e.lun_end = create->conf.s.lun_end;
+ e.op = NVM_TARGET_DEFAULT_OP;
+ break;
+ case NVM_CONFIG_TYPE_EXTENDED:
+ ret = __nvm_config_extended(dev, &create->conf.e);
+ if (ret)
+ return ret;
+
+ e = create->conf.e;
+ break;
+ default:
+ pr_err("config type not valid\n");
+ return -EINVAL;
+ }
+
+ tt = nvm_find_target_type(create->tgttype);
+ if (!tt) {
+ pr_err("target type %s not found\n", create->tgttype);
+ return -EINVAL;
+ }
+
+ if ((tt->flags & NVM_TGT_F_HOST_L2P) != (dev->geo.dom & NVM_RSP_L2P)) {
+ pr_err("device is incompatible with target L2P type.\n");
+ return -EINVAL;
+ }
+
+ if (nvm_target_exists(create->tgtname)) {
+ pr_err("target name already exists (%s)\n",
+ create->tgtname);
+ return -EINVAL;
+ }
+
+ ret = nvm_reserve_luns(dev, e.lun_begin, e.lun_end);
+ if (ret)
+ return ret;
+
+ t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL);
+ if (!t) {
+ ret = -ENOMEM;
+ goto err_reserve;
+ }
+
+ tgt_dev = nvm_create_tgt_dev(dev, e.lun_begin, e.lun_end, e.op);
+ if (!tgt_dev) {
+ pr_err("could not create target device\n");
+ ret = -ENOMEM;
+ goto err_t;
+ }
+
+ tdisk = alloc_disk(0);
+ if (!tdisk) {
+ ret = -ENOMEM;
+ goto err_dev;
+ }
+
+ tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node);
+ if (!tqueue) {
+ ret = -ENOMEM;
+ goto err_disk;
+ }
+ blk_queue_make_request(tqueue, tt->make_rq);
+
+ strlcpy(tdisk->disk_name, create->tgtname, sizeof(tdisk->disk_name));
+ tdisk->flags = GENHD_FL_EXT_DEVT;
+ tdisk->major = 0;
+ tdisk->first_minor = 0;
+ tdisk->fops = &nvm_fops;
+ tdisk->queue = tqueue;
+
+ targetdata = tt->init(tgt_dev, tdisk, create->flags);
+ if (IS_ERR(targetdata)) {
+ ret = PTR_ERR(targetdata);
+ goto err_init;
+ }
+
+ tdisk->private_data = targetdata;
+ tqueue->queuedata = targetdata;
+
+ mdts = (dev->geo.csecs >> 9) * NVM_MAX_VLBA;
+ if (dev->geo.mdts) {
+ mdts = min_t(u32, dev->geo.mdts,
+ (dev->geo.csecs >> 9) * NVM_MAX_VLBA);
+ }
+ blk_queue_max_hw_sectors(tqueue, mdts);
+
+ set_capacity(tdisk, tt->capacity(targetdata));
+ add_disk(tdisk);
+
+ if (tt->sysfs_init && tt->sysfs_init(tdisk)) {
+ ret = -ENOMEM;
+ goto err_sysfs;
+ }
+
+ t->type = tt;
+ t->disk = tdisk;
+ t->dev = tgt_dev;
+
+ mutex_lock(&dev->mlock);
+ list_add_tail(&t->list, &dev->targets);
+ mutex_unlock(&dev->mlock);
+
+ __module_get(tt->owner);
+
+ return 0;
+err_sysfs:
+ if (tt->exit)
+ tt->exit(targetdata, true);
+err_init:
+ blk_cleanup_queue(tqueue);
+ tdisk->queue = NULL;
+err_disk:
+ put_disk(tdisk);
+err_dev:
+ nvm_remove_tgt_dev(tgt_dev, 0);
+err_t:
+ kfree(t);
+err_reserve:
+ nvm_release_luns_err(dev, e.lun_begin, e.lun_end);
+ return ret;
+}
+
+static void __nvm_remove_target(struct nvm_target *t, bool graceful)
+{
+ struct nvm_tgt_type *tt = t->type;
+ struct gendisk *tdisk = t->disk;
+ struct request_queue *q = tdisk->queue;
+
+ del_gendisk(tdisk);
+ blk_cleanup_queue(q);
+
+ if (tt->sysfs_exit)
+ tt->sysfs_exit(tdisk);
+
+ if (tt->exit)
+ tt->exit(tdisk->private_data, graceful);
+
+ nvm_remove_tgt_dev(t->dev, 1);
+ put_disk(tdisk);
+ module_put(t->type->owner);
+
+ list_del(&t->list);
+ kfree(t);
+}
+
+/**
+ * nvm_remove_tgt - Removes a target from the media manager
+ * @remove: ioctl structure with target name to remove.
+ *
+ * Returns:
+ * 0: on success
+ * 1: on not found
+ * <0: on error
+ */
+static int nvm_remove_tgt(struct nvm_ioctl_remove *remove)
+{
+ struct nvm_target *t = NULL;
+ struct nvm_dev *dev;
+
+ down_read(&nvm_lock);
+ list_for_each_entry(dev, &nvm_devices, devices) {
+ mutex_lock(&dev->mlock);
+ t = nvm_find_target(dev, remove->tgtname);
+ if (t) {
+ mutex_unlock(&dev->mlock);
+ break;
+ }
+ mutex_unlock(&dev->mlock);
+ }
+ up_read(&nvm_lock);
+
+ if (!t) {
+ pr_err("failed to remove target %s\n",
+ remove->tgtname);
+ return 1;
+ }
+
+ __nvm_remove_target(t, true);
+ kref_put(&dev->ref, nvm_free);
+
+ return 0;
+}
+
+static int nvm_register_map(struct nvm_dev *dev)
+{
+ struct nvm_dev_map *rmap;
+ int i, j;
+
+ rmap = kmalloc(sizeof(struct nvm_dev_map), GFP_KERNEL);
+ if (!rmap)
+ goto err_rmap;
+
+ rmap->chnls = kcalloc(dev->geo.num_ch, sizeof(struct nvm_ch_map),
+ GFP_KERNEL);
+ if (!rmap->chnls)
+ goto err_chnls;
+
+ for (i = 0; i < dev->geo.num_ch; i++) {
+ struct nvm_ch_map *ch_rmap;
+ int *lun_roffs;
+ int luns_in_chnl = dev->geo.num_lun;
+
+ ch_rmap = &rmap->chnls[i];
+
+ ch_rmap->ch_off = -1;
+ ch_rmap->num_lun = luns_in_chnl;
+
+ lun_roffs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL);
+ if (!lun_roffs)
+ goto err_ch;
+
+ for (j = 0; j < luns_in_chnl; j++)
+ lun_roffs[j] = -1;
+
+ ch_rmap->lun_offs = lun_roffs;
+ }
+
+ dev->rmap = rmap;
+
+ return 0;
+err_ch:
+ while (--i >= 0)
+ kfree(rmap->chnls[i].lun_offs);
+err_chnls:
+ kfree(rmap);
+err_rmap:
+ return -ENOMEM;
+}
+
+static void nvm_unregister_map(struct nvm_dev *dev)
+{
+ struct nvm_dev_map *rmap = dev->rmap;
+ int i;
+
+ for (i = 0; i < dev->geo.num_ch; i++)
+ kfree(rmap->chnls[i].lun_offs);
+
+ kfree(rmap->chnls);
+ kfree(rmap);
+}
+
+static void nvm_map_to_dev(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p)
+{
+ struct nvm_dev_map *dev_map = tgt_dev->map;
+ struct nvm_ch_map *ch_map = &dev_map->chnls[p->a.ch];
+ int lun_off = ch_map->lun_offs[p->a.lun];
+
+ p->a.ch += ch_map->ch_off;
+ p->a.lun += lun_off;
+}
+
+static void nvm_map_to_tgt(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p)
+{
+ struct nvm_dev *dev = tgt_dev->parent;
+ struct nvm_dev_map *dev_rmap = dev->rmap;
+ struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[p->a.ch];
+ int lun_roff = ch_rmap->lun_offs[p->a.lun];
+
+ p->a.ch -= ch_rmap->ch_off;
+ p->a.lun -= lun_roff;
+}
+
+static void nvm_ppa_tgt_to_dev(struct nvm_tgt_dev *tgt_dev,
+ struct ppa_addr *ppa_list, int nr_ppas)
+{
+ int i;
+
+ for (i = 0; i < nr_ppas; i++) {
+ nvm_map_to_dev(tgt_dev, &ppa_list[i]);
+ ppa_list[i] = generic_to_dev_addr(tgt_dev->parent, ppa_list[i]);
+ }
+}
+
+static void nvm_ppa_dev_to_tgt(struct nvm_tgt_dev *tgt_dev,
+ struct ppa_addr *ppa_list, int nr_ppas)
+{
+ int i;
+
+ for (i = 0; i < nr_ppas; i++) {
+ ppa_list[i] = dev_to_generic_addr(tgt_dev->parent, ppa_list[i]);
+ nvm_map_to_tgt(tgt_dev, &ppa_list[i]);
+ }
+}
+
+static void nvm_rq_tgt_to_dev(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
+{
+ struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
+
+ nvm_ppa_tgt_to_dev(tgt_dev, ppa_list, rqd->nr_ppas);
+}
+
+static void nvm_rq_dev_to_tgt(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
+{
+ struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
+
+ nvm_ppa_dev_to_tgt(tgt_dev, ppa_list, rqd->nr_ppas);
+}
+
+int nvm_register_tgt_type(struct nvm_tgt_type *tt)
+{
+ int ret = 0;
+
+ down_write(&nvm_tgtt_lock);
+ if (__nvm_find_target_type(tt->name))
+ ret = -EEXIST;
+ else
+ list_add(&tt->list, &nvm_tgt_types);
+ up_write(&nvm_tgtt_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL(nvm_register_tgt_type);
+
+void nvm_unregister_tgt_type(struct nvm_tgt_type *tt)
+{
+ if (!tt)
+ return;
+
+ down_write(&nvm_tgtt_lock);
+ list_del(&tt->list);
+ up_write(&nvm_tgtt_lock);
+}
+EXPORT_SYMBOL(nvm_unregister_tgt_type);
+
+void *nvm_dev_dma_alloc(struct nvm_dev *dev, gfp_t mem_flags,
+ dma_addr_t *dma_handler)
+{
+ return dev->ops->dev_dma_alloc(dev, dev->dma_pool, mem_flags,
+ dma_handler);
+}
+EXPORT_SYMBOL(nvm_dev_dma_alloc);
+
+void nvm_dev_dma_free(struct nvm_dev *dev, void *addr, dma_addr_t dma_handler)
+{
+ dev->ops->dev_dma_free(dev->dma_pool, addr, dma_handler);
+}
+EXPORT_SYMBOL(nvm_dev_dma_free);
+
+static struct nvm_dev *nvm_find_nvm_dev(const char *name)
+{
+ struct nvm_dev *dev;
+
+ list_for_each_entry(dev, &nvm_devices, devices)
+ if (!strcmp(name, dev->name))
+ return dev;
+
+ return NULL;
+}
+
+static int nvm_set_rqd_ppalist(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd,
+ const struct ppa_addr *ppas, int nr_ppas)
+{
+ struct nvm_dev *dev = tgt_dev->parent;
+ struct nvm_geo *geo = &tgt_dev->geo;
+ int i, plane_cnt, pl_idx;
+ struct ppa_addr ppa;
+
+ if (geo->pln_mode == NVM_PLANE_SINGLE && nr_ppas == 1) {
+ rqd->nr_ppas = nr_ppas;
+ rqd->ppa_addr = ppas[0];
+
+ return 0;
+ }
+
+ rqd->nr_ppas = nr_ppas;
+ rqd->ppa_list = nvm_dev_dma_alloc(dev, GFP_KERNEL, &rqd->dma_ppa_list);
+ if (!rqd->ppa_list) {
+ pr_err("failed to allocate dma memory\n");
+ return -ENOMEM;
+ }
+
+ plane_cnt = geo->pln_mode;
+ rqd->nr_ppas *= plane_cnt;
+
+ for (i = 0; i < nr_ppas; i++) {
+ for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) {
+ ppa = ppas[i];
+ ppa.g.pl = pl_idx;
+ rqd->ppa_list[(pl_idx * nr_ppas) + i] = ppa;
+ }
+ }
+
+ return 0;
+}
+
+static void nvm_free_rqd_ppalist(struct nvm_tgt_dev *tgt_dev,
+ struct nvm_rq *rqd)
+{
+ if (!rqd->ppa_list)
+ return;
+
+ nvm_dev_dma_free(tgt_dev->parent, rqd->ppa_list, rqd->dma_ppa_list);
+}
+
+static int nvm_set_flags(struct nvm_geo *geo, struct nvm_rq *rqd)
+{
+ int flags = 0;
+
+ if (geo->version == NVM_OCSSD_SPEC_20)
+ return 0;
+
+ if (rqd->is_seq)
+ flags |= geo->pln_mode >> 1;
+
+ if (rqd->opcode == NVM_OP_PREAD)
+ flags |= (NVM_IO_SCRAMBLE_ENABLE | NVM_IO_SUSPEND);
+ else if (rqd->opcode == NVM_OP_PWRITE)
+ flags |= NVM_IO_SCRAMBLE_ENABLE;
+
+ return flags;
+}
+
+int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd, void *buf)
+{
+ struct nvm_dev *dev = tgt_dev->parent;
+ int ret;
+
+ if (!dev->ops->submit_io)
+ return -ENODEV;
+
+ nvm_rq_tgt_to_dev(tgt_dev, rqd);
+
+ rqd->dev = tgt_dev;
+ rqd->flags = nvm_set_flags(&tgt_dev->geo, rqd);
+
+ /* In case of error, fail with right address format */
+ ret = dev->ops->submit_io(dev, rqd, buf);
+ if (ret)
+ nvm_rq_dev_to_tgt(tgt_dev, rqd);
+ return ret;
+}
+EXPORT_SYMBOL(nvm_submit_io);
+
+static void nvm_sync_end_io(struct nvm_rq *rqd)
+{
+ struct completion *waiting = rqd->private;
+
+ complete(waiting);
+}
+
+static int nvm_submit_io_wait(struct nvm_dev *dev, struct nvm_rq *rqd,
+ void *buf)
+{
+ DECLARE_COMPLETION_ONSTACK(wait);
+ int ret = 0;
+
+ rqd->end_io = nvm_sync_end_io;
+ rqd->private = &wait;
+
+ ret = dev->ops->submit_io(dev, rqd, buf);
+ if (ret)
+ return ret;
+
+ wait_for_completion_io(&wait);
+
+ return 0;
+}
+
+int nvm_submit_io_sync(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd,
+ void *buf)
+{
+ struct nvm_dev *dev = tgt_dev->parent;
+ int ret;
+
+ if (!dev->ops->submit_io)
+ return -ENODEV;
+
+ nvm_rq_tgt_to_dev(tgt_dev, rqd);
+
+ rqd->dev = tgt_dev;
+ rqd->flags = nvm_set_flags(&tgt_dev->geo, rqd);
+
+ ret = nvm_submit_io_wait(dev, rqd, buf);
+
+ return ret;
+}
+EXPORT_SYMBOL(nvm_submit_io_sync);
+
+void nvm_end_io(struct nvm_rq *rqd)
+{
+ struct nvm_tgt_dev *tgt_dev = rqd->dev;
+
+ /* Convert address space */
+ if (tgt_dev)
+ nvm_rq_dev_to_tgt(tgt_dev, rqd);
+
+ if (rqd->end_io)
+ rqd->end_io(rqd);
+}
+EXPORT_SYMBOL(nvm_end_io);
+
+static int nvm_submit_io_sync_raw(struct nvm_dev *dev, struct nvm_rq *rqd)
+{
+ if (!dev->ops->submit_io)
+ return -ENODEV;
+
+ rqd->dev = NULL;
+ rqd->flags = nvm_set_flags(&dev->geo, rqd);
+
+ return nvm_submit_io_wait(dev, rqd, NULL);
+}
+
+static int nvm_bb_chunk_sense(struct nvm_dev *dev, struct ppa_addr ppa)
+{
+ struct nvm_rq rqd = { NULL };
+ struct bio bio;
+ struct bio_vec bio_vec;
+ struct page *page;
+ int ret;
+
+ page = alloc_page(GFP_KERNEL);
+ if (!page)
+ return -ENOMEM;
+
+ bio_init(&bio, &bio_vec, 1);
+ bio_add_page(&bio, page, PAGE_SIZE, 0);
+ bio_set_op_attrs(&bio, REQ_OP_READ, 0);
+
+ rqd.bio = &bio;
+ rqd.opcode = NVM_OP_PREAD;
+ rqd.is_seq = 1;
+ rqd.nr_ppas = 1;
+ rqd.ppa_addr = generic_to_dev_addr(dev, ppa);
+
+ ret = nvm_submit_io_sync_raw(dev, &rqd);
+ __free_page(page);
+ if (ret)
+ return ret;
+
+ return rqd.error;
+}
+
+/*
+ * Scans a 1.2 chunk first and last page to determine if its state.
+ * If the chunk is found to be open, also scan it to update the write
+ * pointer.
+ */
+static int nvm_bb_chunk_scan(struct nvm_dev *dev, struct ppa_addr ppa,
+ struct nvm_chk_meta *meta)
+{
+ struct nvm_geo *geo = &dev->geo;
+ int ret, pg, pl;
+
+ /* sense first page */
+ ret = nvm_bb_chunk_sense(dev, ppa);
+ if (ret < 0) /* io error */
+ return ret;
+ else if (ret == 0) /* valid data */
+ meta->state = NVM_CHK_ST_OPEN;
+ else if (ret > 0) {
+ /*
+ * If empty page, the chunk is free, else it is an
+ * actual io error. In that case, mark it offline.
+ */
+ switch (ret) {
+ case NVM_RSP_ERR_EMPTYPAGE:
+ meta->state = NVM_CHK_ST_FREE;
+ return 0;
+ case NVM_RSP_ERR_FAILCRC:
+ case NVM_RSP_ERR_FAILECC:
+ case NVM_RSP_WARN_HIGHECC:
+ meta->state = NVM_CHK_ST_OPEN;
+ goto scan;
+ default:
+ return -ret; /* other io error */
+ }
+ }
+
+ /* sense last page */
+ ppa.g.pg = geo->num_pg - 1;
+ ppa.g.pl = geo->num_pln - 1;
+
+ ret = nvm_bb_chunk_sense(dev, ppa);
+ if (ret < 0) /* io error */
+ return ret;
+ else if (ret == 0) { /* Chunk fully written */
+ meta->state = NVM_CHK_ST_CLOSED;
+ meta->wp = geo->clba;
+ return 0;
+ } else if (ret > 0) {
+ switch (ret) {
+ case NVM_RSP_ERR_EMPTYPAGE:
+ case NVM_RSP_ERR_FAILCRC:
+ case NVM_RSP_ERR_FAILECC:
+ case NVM_RSP_WARN_HIGHECC:
+ meta->state = NVM_CHK_ST_OPEN;
+ break;
+ default:
+ return -ret; /* other io error */
+ }
+ }
+
+scan:
+ /*
+ * chunk is open, we scan sequentially to update the write pointer.
+ * We make the assumption that targets write data across all planes
+ * before moving to the next page.
+ */
+ for (pg = 0; pg < geo->num_pg; pg++) {
+ for (pl = 0; pl < geo->num_pln; pl++) {
+ ppa.g.pg = pg;
+ ppa.g.pl = pl;
+
+ ret = nvm_bb_chunk_sense(dev, ppa);
+ if (ret < 0) /* io error */
+ return ret;
+ else if (ret == 0) {
+ meta->wp += geo->ws_min;
+ } else if (ret > 0) {
+ switch (ret) {
+ case NVM_RSP_ERR_EMPTYPAGE:
+ return 0;
+ case NVM_RSP_ERR_FAILCRC:
+ case NVM_RSP_ERR_FAILECC:
+ case NVM_RSP_WARN_HIGHECC:
+ meta->wp += geo->ws_min;
+ break;
+ default:
+ return -ret; /* other io error */
+ }
+ }
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * folds a bad block list from its plane representation to its
+ * chunk representation.
+ *
+ * If any of the planes status are bad or grown bad, the chunk is marked
+ * offline. If not bad, the first plane state acts as the chunk state.
+ */
+static int nvm_bb_to_chunk(struct nvm_dev *dev, struct ppa_addr ppa,
+ u8 *blks, int nr_blks, struct nvm_chk_meta *meta)
+{
+ struct nvm_geo *geo = &dev->geo;
+ int ret, blk, pl, offset, blktype;
+
+ for (blk = 0; blk < geo->num_chk; blk++) {
+ offset = blk * geo->pln_mode;
+ blktype = blks[offset];
+
+ for (pl = 0; pl < geo->pln_mode; pl++) {
+ if (blks[offset + pl] &
+ (NVM_BLK_T_BAD|NVM_BLK_T_GRWN_BAD)) {
+ blktype = blks[offset + pl];
+ break;
+ }
+ }
+
+ ppa.g.blk = blk;
+
+ meta->wp = 0;
+ meta->type = NVM_CHK_TP_W_SEQ;
+ meta->wi = 0;
+ meta->slba = generic_to_dev_addr(dev, ppa).ppa;
+ meta->cnlb = dev->geo.clba;
+
+ if (blktype == NVM_BLK_T_FREE) {
+ ret = nvm_bb_chunk_scan(dev, ppa, meta);
+ if (ret)
+ return ret;
+ } else {
+ meta->state = NVM_CHK_ST_OFFLINE;
+ }
+
+ meta++;
+ }
+
+ return 0;
+}
+
+static int nvm_get_bb_meta(struct nvm_dev *dev, sector_t slba,
+ int nchks, struct nvm_chk_meta *meta)
+{
+ struct nvm_geo *geo = &dev->geo;
+ struct ppa_addr ppa;
+ u8 *blks;
+ int ch, lun, nr_blks;
+ int ret = 0;
+
+ ppa.ppa = slba;
+ ppa = dev_to_generic_addr(dev, ppa);
+
+ if (ppa.g.blk != 0)
+ return -EINVAL;
+
+ if ((nchks % geo->num_chk) != 0)
+ return -EINVAL;
+
+ nr_blks = geo->num_chk * geo->pln_mode;
+
+ blks = kmalloc(nr_blks, GFP_KERNEL);
+ if (!blks)
+ return -ENOMEM;
+
+ for (ch = ppa.g.ch; ch < geo->num_ch; ch++) {
+ for (lun = ppa.g.lun; lun < geo->num_lun; lun++) {
+ struct ppa_addr ppa_gen, ppa_dev;
+
+ if (!nchks)
+ goto done;
+
+ ppa_gen.ppa = 0;
+ ppa_gen.g.ch = ch;
+ ppa_gen.g.lun = lun;
+ ppa_dev = generic_to_dev_addr(dev, ppa_gen);
+
+ ret = dev->ops->get_bb_tbl(dev, ppa_dev, blks);
+ if (ret)
+ goto done;
+
+ ret = nvm_bb_to_chunk(dev, ppa_gen, blks, nr_blks,
+ meta);
+ if (ret)
+ goto done;
+
+ meta += geo->num_chk;
+ nchks -= geo->num_chk;
+ }
+ }
+done:
+ kfree(blks);
+ return ret;
+}
+
+int nvm_get_chunk_meta(struct nvm_tgt_dev *tgt_dev, struct ppa_addr ppa,
+ int nchks, struct nvm_chk_meta *meta)
+{
+ struct nvm_dev *dev = tgt_dev->parent;
+
+ nvm_ppa_tgt_to_dev(tgt_dev, &ppa, 1);
+
+ if (dev->geo.version == NVM_OCSSD_SPEC_12)
+ return nvm_get_bb_meta(dev, (sector_t)ppa.ppa, nchks, meta);
+
+ return dev->ops->get_chk_meta(dev, (sector_t)ppa.ppa, nchks, meta);
+}
+EXPORT_SYMBOL_GPL(nvm_get_chunk_meta);
+
+int nvm_set_chunk_meta(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas,
+ int nr_ppas, int type)
+{
+ struct nvm_dev *dev = tgt_dev->parent;
+ struct nvm_rq rqd;
+ int ret;
+
+ if (dev->geo.version == NVM_OCSSD_SPEC_20)
+ return 0;
+
+ if (nr_ppas > NVM_MAX_VLBA) {
+ pr_err("unable to update all blocks atomically\n");
+ return -EINVAL;
+ }
+
+ memset(&rqd, 0, sizeof(struct nvm_rq));
+
+ nvm_set_rqd_ppalist(tgt_dev, &rqd, ppas, nr_ppas);
+ nvm_rq_tgt_to_dev(tgt_dev, &rqd);
+
+ ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type);
+ nvm_free_rqd_ppalist(tgt_dev, &rqd);
+ if (ret)
+ return -EINVAL;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(nvm_set_chunk_meta);
+
+static int nvm_core_init(struct nvm_dev *dev)
+{
+ struct nvm_geo *geo = &dev->geo;
+ int ret;
+
+ dev->lun_map = kcalloc(BITS_TO_LONGS(geo->all_luns),
+ sizeof(unsigned long), GFP_KERNEL);
+ if (!dev->lun_map)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&dev->area_list);
+ INIT_LIST_HEAD(&dev->targets);
+ mutex_init(&dev->mlock);
+ spin_lock_init(&dev->lock);
+
+ ret = nvm_register_map(dev);
+ if (ret)
+ goto err_fmtype;
+
+ return 0;
+err_fmtype:
+ kfree(dev->lun_map);
+ return ret;
+}
+
+static void nvm_free(struct kref *ref)
+{
+ struct nvm_dev *dev = container_of(ref, struct nvm_dev, ref);
+
+ if (dev->dma_pool)
+ dev->ops->destroy_dma_pool(dev->dma_pool);
+
+ if (dev->rmap)
+ nvm_unregister_map(dev);
+
+ kfree(dev->lun_map);
+ kfree(dev);
+}
+
+static int nvm_init(struct nvm_dev *dev)
+{
+ struct nvm_geo *geo = &dev->geo;
+ int ret = -EINVAL;
+
+ if (dev->ops->identity(dev)) {
+ pr_err("device could not be identified\n");
+ goto err;
+ }
+
+ pr_debug("ver:%u.%u nvm_vendor:%x\n", geo->major_ver_id,
+ geo->minor_ver_id, geo->vmnt);
+
+ ret = nvm_core_init(dev);
+ if (ret) {
+ pr_err("could not initialize core structures.\n");
+ goto err;
+ }
+
+ pr_info("registered %s [%u/%u/%u/%u/%u]\n",
+ dev->name, dev->geo.ws_min, dev->geo.ws_opt,
+ dev->geo.num_chk, dev->geo.all_luns,
+ dev->geo.num_ch);
+ return 0;
+err:
+ pr_err("failed to initialize nvm\n");
+ return ret;
+}
+
+struct nvm_dev *nvm_alloc_dev(int node)
+{
+ struct nvm_dev *dev;
+
+ dev = kzalloc_node(sizeof(struct nvm_dev), GFP_KERNEL, node);
+ if (dev)
+ kref_init(&dev->ref);
+
+ return dev;
+}
+EXPORT_SYMBOL(nvm_alloc_dev);
+
+int nvm_register(struct nvm_dev *dev)
+{
+ int ret, exp_pool_size;
+
+ if (!dev->q || !dev->ops) {
+ kref_put(&dev->ref, nvm_free);
+ return -EINVAL;
+ }
+
+ ret = nvm_init(dev);
+ if (ret) {
+ kref_put(&dev->ref, nvm_free);
+ return ret;
+ }
+
+ exp_pool_size = max_t(int, PAGE_SIZE,
+ (NVM_MAX_VLBA * (sizeof(u64) + dev->geo.sos)));
+ exp_pool_size = round_up(exp_pool_size, PAGE_SIZE);
+
+ dev->dma_pool = dev->ops->create_dma_pool(dev, "ppalist",
+ exp_pool_size);
+ if (!dev->dma_pool) {
+ pr_err("could not create dma pool\n");
+ kref_put(&dev->ref, nvm_free);
+ return -ENOMEM;
+ }
+
+ /* register device with a supported media manager */
+ down_write(&nvm_lock);
+ list_add(&dev->devices, &nvm_devices);
+ up_write(&nvm_lock);
+
+ return 0;
+}
+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, false);
+ kref_put(&dev->ref, nvm_free);
+ }
+ mutex_unlock(&dev->mlock);
+
+ down_write(&nvm_lock);
+ list_del(&dev->devices);
+ up_write(&nvm_lock);
+
+ kref_put(&dev->ref, nvm_free);
+}
+EXPORT_SYMBOL(nvm_unregister);
+
+static int __nvm_configure_create(struct nvm_ioctl_create *create)
+{
+ struct nvm_dev *dev;
+ int ret;
+
+ down_write(&nvm_lock);
+ dev = nvm_find_nvm_dev(create->dev);
+ up_write(&nvm_lock);
+
+ if (!dev) {
+ pr_err("device not found\n");
+ return -EINVAL;
+ }
+
+ kref_get(&dev->ref);
+ ret = nvm_create_tgt(dev, create);
+ if (ret)
+ kref_put(&dev->ref, nvm_free);
+
+ return ret;
+}
+
+static long nvm_ioctl_info(struct file *file, void __user *arg)
+{
+ struct nvm_ioctl_info *info;
+ struct nvm_tgt_type *tt;
+ int tgt_iter = 0;
+
+ info = memdup_user(arg, sizeof(struct nvm_ioctl_info));
+ if (IS_ERR(info))
+ return -EFAULT;
+
+ info->version[0] = NVM_VERSION_MAJOR;
+ info->version[1] = NVM_VERSION_MINOR;
+ info->version[2] = NVM_VERSION_PATCH;
+
+ down_write(&nvm_tgtt_lock);
+ list_for_each_entry(tt, &nvm_tgt_types, list) {
+ struct nvm_ioctl_info_tgt *tgt = &info->tgts[tgt_iter];
+
+ tgt->version[0] = tt->version[0];
+ tgt->version[1] = tt->version[1];
+ tgt->version[2] = tt->version[2];
+ strncpy(tgt->tgtname, tt->name, NVM_TTYPE_NAME_MAX);
+
+ tgt_iter++;
+ }
+
+ info->tgtsize = tgt_iter;
+ up_write(&nvm_tgtt_lock);
+
+ if (copy_to_user(arg, info, sizeof(struct nvm_ioctl_info))) {
+ kfree(info);
+ return -EFAULT;
+ }
+
+ kfree(info);
+ return 0;
+}
+
+static long nvm_ioctl_get_devices(struct file *file, void __user *arg)
+{
+ struct nvm_ioctl_get_devices *devices;
+ struct nvm_dev *dev;
+ int i = 0;
+
+ devices = kzalloc(sizeof(struct nvm_ioctl_get_devices), GFP_KERNEL);
+ if (!devices)
+ return -ENOMEM;
+
+ down_write(&nvm_lock);
+ list_for_each_entry(dev, &nvm_devices, devices) {
+ struct nvm_ioctl_device_info *info = &devices->info[i];
+
+ strlcpy(info->devname, dev->name, sizeof(info->devname));
+
+ /* kept for compatibility */
+ info->bmversion[0] = 1;
+ info->bmversion[1] = 0;
+ info->bmversion[2] = 0;
+ strlcpy(info->bmname, "gennvm", sizeof(info->bmname));
+ i++;
+
+ if (i >= ARRAY_SIZE(devices->info)) {
+ pr_err("max %zd devices can be reported.\n",
+ ARRAY_SIZE(devices->info));
+ break;
+ }
+ }
+ up_write(&nvm_lock);
+
+ devices->nr_devices = i;
+
+ if (copy_to_user(arg, devices,
+ sizeof(struct nvm_ioctl_get_devices))) {
+ kfree(devices);
+ return -EFAULT;
+ }
+
+ kfree(devices);
+ return 0;
+}
+
+static long nvm_ioctl_dev_create(struct file *file, void __user *arg)
+{
+ struct nvm_ioctl_create create;
+
+ if (copy_from_user(&create, arg, sizeof(struct nvm_ioctl_create)))
+ return -EFAULT;
+
+ if (create.conf.type == NVM_CONFIG_TYPE_EXTENDED &&
+ create.conf.e.rsv != 0) {
+ pr_err("reserved config field in use\n");
+ return -EINVAL;
+ }
+
+ create.dev[DISK_NAME_LEN - 1] = '\0';
+ create.tgttype[NVM_TTYPE_NAME_MAX - 1] = '\0';
+ create.tgtname[DISK_NAME_LEN - 1] = '\0';
+
+ if (create.flags != 0) {
+ __u32 flags = create.flags;
+
+ /* Check for valid flags */
+ if (flags & NVM_TARGET_FACTORY)
+ flags &= ~NVM_TARGET_FACTORY;
+
+ if (flags) {
+ pr_err("flag not supported\n");
+ return -EINVAL;
+ }
+ }
+
+ return __nvm_configure_create(&create);
+}
+
+static long nvm_ioctl_dev_remove(struct file *file, void __user *arg)
+{
+ struct nvm_ioctl_remove remove;
+
+ if (copy_from_user(&remove, arg, sizeof(struct nvm_ioctl_remove)))
+ return -EFAULT;
+
+ remove.tgtname[DISK_NAME_LEN - 1] = '\0';
+
+ if (remove.flags != 0) {
+ pr_err("no flags supported\n");
+ return -EINVAL;
+ }
+
+ return nvm_remove_tgt(&remove);
+}
+
+/* kept for compatibility reasons */
+static long nvm_ioctl_dev_init(struct file *file, void __user *arg)
+{
+ struct nvm_ioctl_dev_init init;
+
+ if (copy_from_user(&init, arg, sizeof(struct nvm_ioctl_dev_init)))
+ return -EFAULT;
+
+ if (init.flags != 0) {
+ pr_err("no flags supported\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* Kept for compatibility reasons */
+static long nvm_ioctl_dev_factory(struct file *file, void __user *arg)
+{
+ struct nvm_ioctl_dev_factory fact;
+
+ if (copy_from_user(&fact, arg, sizeof(struct nvm_ioctl_dev_factory)))
+ return -EFAULT;
+
+ fact.dev[DISK_NAME_LEN - 1] = '\0';
+
+ if (fact.flags & ~(NVM_FACTORY_NR_BITS - 1))
+ return -EINVAL;
+
+ return 0;
+}
+
+static long nvm_ctl_ioctl(struct file *file, uint cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ switch (cmd) {
+ case NVM_INFO:
+ return nvm_ioctl_info(file, argp);
+ case NVM_GET_DEVICES:
+ return nvm_ioctl_get_devices(file, argp);
+ case NVM_DEV_CREATE:
+ return nvm_ioctl_dev_create(file, argp);
+ case NVM_DEV_REMOVE:
+ return nvm_ioctl_dev_remove(file, argp);
+ case NVM_DEV_INIT:
+ return nvm_ioctl_dev_init(file, argp);
+ case NVM_DEV_FACTORY:
+ return nvm_ioctl_dev_factory(file, argp);
+ }
+ return 0;
+}
+
+static const struct file_operations _ctl_fops = {
+ .open = nonseekable_open,
+ .unlocked_ioctl = nvm_ctl_ioctl,
+ .owner = THIS_MODULE,
+ .llseek = noop_llseek,
+};
+
+static struct miscdevice _nvm_misc = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "lightnvm",
+ .nodename = "lightnvm/control",
+ .fops = &_ctl_fops,
+};
+builtin_misc_device(_nvm_misc);