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Merge branch 'for-4.6/drivers' of git://git.kernel.dk/linux-block

Browse Source 
Pull block driver updates from Jens Axboe:
 "This is the block driver pull request for this merge window.  It sits
  on top of for-4.6/core, that was just sent out.

  This contains:

   - A set of fixes for lightnvm.  One from Alan, fixing an overflow,
     and the rest from the usual suspects, Javier and Matias.

   - A set of fixes for nbd from Markus and Dan, and a fixup from Arnd
     for correct usage of the signed 64-bit divider.

   - A set of bug fixes for the Micron mtip32xx, from Asai.

   - A fix for the brd discard handling from Bart.

   - Update the maintainers entry for cciss, since that hardware has
     transferred ownership.

   - Three bug fixes for bcache from Eric Wheeler.

   - Set of fixes for xen-blk{back,front} from Jan and Konrad.

   - Removal of the cpqarray driver.  It has been disabled in Kconfig
     since 2013, and we were initially scheduled to remove it in 3.15.

   - Various updates and fixes for NVMe, with the most important being:

        - Removal of the per-device NVMe thread, replacing that with a
          watchdog timer instead. From Christoph.

        - Exposing the namespace WWID through sysfs, from Keith.

        - Set of cleanups from Ming Lin.

        - Logging the controller device name instead of the underlying
          PCI device name, from Sagi.

        - And a bunch of fixes and optimizations from the usual suspects
          in this area"

* 'for-4.6/drivers' of git://git.kernel.dk/linux-block: (49 commits)
  NVMe: Expose ns wwid through single sysfs entry
  drivers:block: cpqarray clean up
  brd: Fix discard request processing
  cpqarray: remove it from the kernel
  cciss: update MAINTAINERS
  NVMe: Remove unused sq_head read in completion path
  bcache: fix cache_set_flush() NULL pointer dereference on OOM
  bcache: cleaned up error handling around register_cache()
  bcache: fix race of writeback thread starting before complete initialization
  NVMe: Create discard zero quirk white list
  nbd: use correct div_s64 helper
  mtip32xx: remove unneeded variable in mtip_cmd_timeout()
  lightnvm: generalize rrpc ppa calculations
  lightnvm: remove struct nvm_dev->total_blocks
  lightnvm: rename ->nr_pages to ->nr_sects
  lightnvm: update closed list outside of intr context
  xen/blback: Fit the important information of the thread in 17 characters
  lightnvm: fold get bb tbl when using dual/quad plane mode
  lightnvm: fix up nonsensical configure overrun checking
  xen-blkback: advertise indirect segment support earlier
  ...
This commit is contained in:
Linus Torvalds
2016-03-18 17:13:31 -07:00
parent 35d88d97be 118472ab85
commit 237045fc3c
26 changed files with 792 additions and 3009 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/lightnvm/core.c
View File

@@ -250,7 +250,7 @@ int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd,
return 0;
}
plane_cnt = (1 << dev->plane_mode);
plane_cnt = dev->plane_mode;
rqd->nr_pages = plane_cnt * nr_ppas;
if (dev->ops->max_phys_sect < rqd->nr_pages)
@@ -463,11 +463,7 @@ static int nvm_core_init(struct nvm_dev *dev)
dev->sec_per_lun = dev->sec_per_blk * dev->blks_per_lun;
dev->nr_luns = dev->luns_per_chnl * dev->nr_chnls;
dev->total_blocks = dev->nr_planes *
dev->blks_per_lun *
dev->luns_per_chnl *
dev->nr_chnls;
dev->total_pages = dev->total_blocks * dev->pgs_per_blk;
dev->total_secs = dev->nr_luns * dev->sec_per_lun;
INIT_LIST_HEAD(&dev->online_targets);
mutex_init(&dev->mlock);
@@ -872,20 +868,19 @@ static int nvm_configure_by_str_event(const char *val,
static int nvm_configure_get(char *buf, const struct kernel_param *kp)
{
int sz = 0;
char *buf_start = buf;
int sz;
struct nvm_dev *dev;
buf += sprintf(buf, "available devices:\n");
sz = sprintf(buf, "available devices:\n");
down_write(&nvm_lock);
list_for_each_entry(dev, &nvm_devices, devices) {
if (sz > 4095 - DISK_NAME_LEN)
if (sz > 4095 - DISK_NAME_LEN - 2)
break;
buf += sprintf(buf, " %32s\n", dev->name);
sz += sprintf(buf + sz, " %32s\n", dev->name);
}
up_write(&nvm_lock);
return buf - buf_start - 1;
return sz;
}
static const struct kernel_param_ops nvm_configure_by_str_event_param_ops = {

7
drivers/lightnvm/gennvm.c
View File

@@ -100,14 +100,13 @@ static int gennvm_block_map(u64 slba, u32 nlb, __le64 *entries, void *private)
{
struct nvm_dev *dev = private;
struct gen_nvm *gn = dev->mp;
sector_t max_pages = dev->total_pages * (dev->sec_size >> 9);
u64 elba = slba + nlb;
struct gen_lun *lun;
struct nvm_block *blk;
u64 i;
int lun_id;
if (unlikely(elba > dev->total_pages)) {
if (unlikely(elba > dev->total_secs)) {
pr_err("gennvm: L2P data from device is out of bounds!\n");
return -EINVAL;
}
@@ -115,7 +114,7 @@ static int gennvm_block_map(u64 slba, u32 nlb, __le64 *entries, void *private)
for (i = 0; i < nlb; i++) {
u64 pba = le64_to_cpu(entries[i]);
if (unlikely(pba >= max_pages && pba != U64_MAX)) {
if (unlikely(pba >= dev->total_secs && pba != U64_MAX)) {
pr_err("gennvm: L2P data entry is out of bounds!\n");
return -EINVAL;
}
@@ -197,7 +196,7 @@ static int gennvm_blocks_init(struct nvm_dev *dev, struct gen_nvm *gn)
}
if (dev->ops->get_l2p_tbl) {
ret = dev->ops->get_l2p_tbl(dev, 0, dev->total_pages,
ret = dev->ops->get_l2p_tbl(dev, 0, dev->total_secs,
gennvm_block_map, dev);
if (ret) {
pr_err("gennvm: could not read L2P table.\n");

98
drivers/lightnvm/rrpc.c
View File

@@ -38,7 +38,7 @@ static void rrpc_page_invalidate(struct rrpc *rrpc, struct rrpc_addr *a)
spin_lock(&rblk->lock);
div_u64_rem(a->addr, rrpc->dev->pgs_per_blk, &pg_offset);
div_u64_rem(a->addr, rrpc->dev->sec_per_blk, &pg_offset);
WARN_ON(test_and_set_bit(pg_offset, rblk->invalid_pages));
rblk->nr_invalid_pages++;
@@ -113,14 +113,24 @@ static void rrpc_discard(struct rrpc *rrpc, struct bio *bio)
static int block_is_full(struct rrpc *rrpc, struct rrpc_block *rblk)
{
return (rblk->next_page == rrpc->dev->pgs_per_blk);
return (rblk->next_page == rrpc->dev->sec_per_blk);
}
/* Calculate relative addr for the given block, considering instantiated LUNs */
static u64 block_to_rel_addr(struct rrpc *rrpc, struct rrpc_block *rblk)
{
struct nvm_block *blk = rblk->parent;
int lun_blk = blk->id % (rrpc->dev->blks_per_lun * rrpc->nr_luns);
return lun_blk * rrpc->dev->sec_per_blk;
}
/* Calculate global addr for the given block */
static u64 block_to_addr(struct rrpc *rrpc, struct rrpc_block *rblk)
{
struct nvm_block *blk = rblk->parent;
return blk->id * rrpc->dev->pgs_per_blk;
return blk->id * rrpc->dev->sec_per_blk;
}
static struct ppa_addr linear_to_generic_addr(struct nvm_dev *dev,
@@ -136,7 +146,7 @@ static struct ppa_addr linear_to_generic_addr(struct nvm_dev *dev,
l.g.sec = secs;
sector_div(ppa, dev->sec_per_pg);
div_u64_rem(ppa, dev->sec_per_blk, &pgs);
div_u64_rem(ppa, dev->pgs_per_blk, &pgs);
l.g.pg = pgs;
sector_div(ppa, dev->pgs_per_blk);
@@ -191,12 +201,12 @@ static struct rrpc_block *rrpc_get_blk(struct rrpc *rrpc, struct rrpc_lun *rlun,
return NULL;
}
rblk = &rlun->blocks[blk->id];
rblk = rrpc_get_rblk(rlun, blk->id);
list_add_tail(&rblk->list, &rlun->open_list);
spin_unlock(&lun->lock);
blk->priv = rblk;
bitmap_zero(rblk->invalid_pages, rrpc->dev->pgs_per_blk);
bitmap_zero(rblk->invalid_pages, rrpc->dev->sec_per_blk);
rblk->next_page = 0;
rblk->nr_invalid_pages = 0;
atomic_set(&rblk->data_cmnt_size, 0);
@@ -286,11 +296,11 @@ static int rrpc_move_valid_pages(struct rrpc *rrpc, struct rrpc_block *rblk)
struct bio *bio;
struct page *page;
int slot;
int nr_pgs_per_blk = rrpc->dev->pgs_per_blk;
int nr_sec_per_blk = rrpc->dev->sec_per_blk;
u64 phys_addr;
DECLARE_COMPLETION_ONSTACK(wait);
if (bitmap_full(rblk->invalid_pages, nr_pgs_per_blk))
if (bitmap_full(rblk->invalid_pages, nr_sec_per_blk))
return 0;
bio = bio_alloc(GFP_NOIO, 1);
@@ -306,10 +316,10 @@ static int rrpc_move_valid_pages(struct rrpc *rrpc, struct rrpc_block *rblk)
}
while ((slot = find_first_zero_bit(rblk->invalid_pages,
nr_pgs_per_blk)) < nr_pgs_per_blk) {
nr_sec_per_blk)) < nr_sec_per_blk) {
/* Lock laddr */
phys_addr = (rblk->parent->id * nr_pgs_per_blk) + slot;
phys_addr = rblk->parent->id * nr_sec_per_blk + slot;
try:
spin_lock(&rrpc->rev_lock);
@@ -381,7 +391,7 @@ finished:
mempool_free(page, rrpc->page_pool);
bio_put(bio);
if (!bitmap_full(rblk->invalid_pages, nr_pgs_per_blk)) {
if (!bitmap_full(rblk->invalid_pages, nr_sec_per_blk)) {
pr_err("nvm: failed to garbage collect block\n");
return -EIO;
}
@@ -499,12 +509,21 @@ static void rrpc_gc_queue(struct work_struct *work)
struct rrpc *rrpc = gcb->rrpc;
struct rrpc_block *rblk = gcb->rblk;
struct nvm_lun *lun = rblk->parent->lun;
struct nvm_block *blk = rblk->parent;
struct rrpc_lun *rlun = &rrpc->luns[lun->id - rrpc->lun_offset];
spin_lock(&rlun->lock);
list_add_tail(&rblk->prio, &rlun->prio_list);
spin_unlock(&rlun->lock);
spin_lock(&lun->lock);
lun->nr_open_blocks--;
lun->nr_closed_blocks++;
blk->state &= ~NVM_BLK_ST_OPEN;
blk->state |= NVM_BLK_ST_CLOSED;
list_move_tail(&rblk->list, &rlun->closed_list);
spin_unlock(&lun->lock);
mempool_free(gcb, rrpc->gcb_pool);
pr_debug("nvm: block '%lu' is full, allow GC (sched)\n",
rblk->parent->id);
@@ -545,7 +564,7 @@ static struct rrpc_addr *rrpc_update_map(struct rrpc *rrpc, sector_t laddr,
struct rrpc_addr *gp;
struct rrpc_rev_addr *rev;
BUG_ON(laddr >= rrpc->nr_pages);
BUG_ON(laddr >= rrpc->nr_sects);
gp = &rrpc->trans_map[laddr];
spin_lock(&rrpc->rev_lock);
@@ -668,20 +687,8 @@ static void rrpc_end_io_write(struct rrpc *rrpc, struct rrpc_rq *rrqd,
lun = rblk->parent->lun;
cmnt_size = atomic_inc_return(&rblk->data_cmnt_size);
if (unlikely(cmnt_size == rrpc->dev->pgs_per_blk)) {
struct nvm_block *blk = rblk->parent;
struct rrpc_lun *rlun = rblk->rlun;
spin_lock(&lun->lock);
lun->nr_open_blocks--;
lun->nr_closed_blocks++;
blk->state &= ~NVM_BLK_ST_OPEN;
blk->state |= NVM_BLK_ST_CLOSED;
list_move_tail(&rblk->list, &rlun->closed_list);
spin_unlock(&lun->lock);
if (unlikely(cmnt_size == rrpc->dev->sec_per_blk))
rrpc_run_gc(rrpc, rblk);
}
}
}
@@ -726,7 +733,7 @@ static int rrpc_read_ppalist_rq(struct rrpc *rrpc, struct bio *bio,
for (i = 0; i < npages; i++) {
/* We assume that mapping occurs at 4KB granularity */
BUG_ON(!(laddr + i >= 0 && laddr + i < rrpc->nr_pages));
BUG_ON(!(laddr + i >= 0 && laddr + i < rrpc->nr_sects));
gp = &rrpc->trans_map[laddr + i];
if (gp->rblk) {
@@ -757,7 +764,7 @@ static int rrpc_read_rq(struct rrpc *rrpc, struct bio *bio, struct nvm_rq *rqd,
if (!is_gc && rrpc_lock_rq(rrpc, bio, rqd))
return NVM_IO_REQUEUE;
BUG_ON(!(laddr >= 0 && laddr < rrpc->nr_pages));
BUG_ON(!(laddr >= 0 && laddr < rrpc->nr_sects));
gp = &rrpc->trans_map[laddr];
if (gp->rblk) {
@@ -1007,21 +1014,21 @@ static int rrpc_l2p_update(u64 slba, u32 nlb, __le64 *entries, void *private)
struct nvm_dev *dev = rrpc->dev;
struct rrpc_addr *addr = rrpc->trans_map + slba;
struct rrpc_rev_addr *raddr = rrpc->rev_trans_map;
sector_t max_pages = dev->total_pages * (dev->sec_size >> 9);
u64 elba = slba + nlb;
u64 i;
if (unlikely(elba > dev->total_pages)) {
if (unlikely(elba > dev->total_secs)) {
pr_err("nvm: L2P data from device is out of bounds!\n");
return -EINVAL;
}
for (i = 0; i < nlb; i++) {
u64 pba = le64_to_cpu(entries[i]);
unsigned int mod;
/* LNVM treats address-spaces as silos, LBA and PBA are
* equally large and zero-indexed.
*/
if (unlikely(pba >= max_pages && pba != U64_MAX)) {
if (unlikely(pba >= dev->total_secs && pba != U64_MAX)) {
pr_err("nvm: L2P data entry is out of bounds!\n");
return -EINVAL;
}
@@ -1033,8 +1040,10 @@ static int rrpc_l2p_update(u64 slba, u32 nlb, __le64 *entries, void *private)
if (!pba)
continue;
div_u64_rem(pba, rrpc->nr_sects, &mod);
addr[i].addr = pba;
raddr[pba].addr = slba + i;
raddr[mod].addr = slba + i;
}
return 0;
@@ -1046,16 +1055,16 @@ static int rrpc_map_init(struct rrpc *rrpc)
sector_t i;
int ret;
rrpc->trans_map = vzalloc(sizeof(struct rrpc_addr) * rrpc->nr_pages);
rrpc->trans_map = vzalloc(sizeof(struct rrpc_addr) * rrpc->nr_sects);
if (!rrpc->trans_map)
return -ENOMEM;
rrpc->rev_trans_map = vmalloc(sizeof(struct rrpc_rev_addr)
* rrpc->nr_pages);
* rrpc->nr_sects);
if (!rrpc->rev_trans_map)
return -ENOMEM;
for (i = 0; i < rrpc->nr_pages; i++) {
for (i = 0; i < rrpc->nr_sects; i++) {
struct rrpc_addr *p = &rrpc->trans_map[i];
struct rrpc_rev_addr *r = &rrpc->rev_trans_map[i];
@@ -1067,8 +1076,8 @@ static int rrpc_map_init(struct rrpc *rrpc)
return 0;
/* Bring up the mapping table from device */
ret = dev->ops->get_l2p_tbl(dev, 0, dev->total_pages,
rrpc_l2p_update, rrpc);
ret = dev->ops->get_l2p_tbl(dev, 0, dev->total_secs, rrpc_l2p_update,
rrpc);
if (ret) {
pr_err("nvm: rrpc: could not read L2P table.\n");
return -EINVAL;
@@ -1141,7 +1150,7 @@ static int rrpc_luns_init(struct rrpc *rrpc, int lun_begin, int lun_end)
struct rrpc_lun *rlun;
int i, j;
if (dev->pgs_per_blk > MAX_INVALID_PAGES_STORAGE * BITS_PER_LONG) {
if (dev->sec_per_blk > MAX_INVALID_PAGES_STORAGE * BITS_PER_LONG) {
pr_err("rrpc: number of pages per block too high.");
return -EINVAL;
}
@@ -1168,7 +1177,7 @@ static int rrpc_luns_init(struct rrpc *rrpc, int lun_begin, int lun_end)
spin_lock_init(&rlun->lock);
rrpc->total_blocks += dev->blks_per_lun;
rrpc->nr_pages += dev->sec_per_lun;
rrpc->nr_sects += dev->sec_per_lun;
rlun->blocks = vzalloc(sizeof(struct rrpc_block) *
rrpc->dev->blks_per_lun);
@@ -1221,9 +1230,9 @@ static sector_t rrpc_capacity(void *private)
/* cur, gc, and two emergency blocks for each lun */
reserved = rrpc->nr_luns * dev->max_pages_per_blk * 4;
provisioned = rrpc->nr_pages - reserved;
provisioned = rrpc->nr_sects - reserved;
if (reserved > rrpc->nr_pages) {
if (reserved > rrpc->nr_sects) {
pr_err("rrpc: not enough space available to expose storage.\n");
return 0;
}
@@ -1242,10 +1251,11 @@ static void rrpc_block_map_update(struct rrpc *rrpc, struct rrpc_block *rblk)
struct nvm_dev *dev = rrpc->dev;
int offset;
struct rrpc_addr *laddr;
u64 paddr, pladdr;
u64 bpaddr, paddr, pladdr;
for (offset = 0; offset < dev->pgs_per_blk; offset++) {
paddr = block_to_addr(rrpc, rblk) + offset;
bpaddr = block_to_rel_addr(rrpc, rblk);
for (offset = 0; offset < dev->sec_per_blk; offset++) {
paddr = bpaddr + offset;
pladdr = rrpc->rev_trans_map[paddr].addr;
if (pladdr == ADDR_EMPTY)
@@ -1386,7 +1396,7 @@ static void *rrpc_init(struct nvm_dev *dev, struct gendisk *tdisk,
blk_queue_max_hw_sectors(tqueue, queue_max_hw_sectors(bqueue));
pr_info("nvm: rrpc initialized with %u luns and %llu pages.\n",
rrpc->nr_luns, (unsigned long long)rrpc->nr_pages);
rrpc->nr_luns, (unsigned long long)rrpc->nr_sects);
mod_timer(&rrpc->gc_timer, jiffies + msecs_to_jiffies(10));

15
drivers/lightnvm/rrpc.h
View File

@@ -104,7 +104,7 @@ struct rrpc {
struct rrpc_lun *luns;
/* calculated values */
unsigned long long nr_pages;
unsigned long long nr_sects;
unsigned long total_blocks;
/* Write strategy variables. Move these into each for structure for each
@@ -156,6 +156,15 @@ struct rrpc_rev_addr {
u64 addr;
};
static inline struct rrpc_block *rrpc_get_rblk(struct rrpc_lun *rlun,
int blk_id)
{
struct rrpc *rrpc = rlun->rrpc;
int lun_blk = blk_id % rrpc->dev->blks_per_lun;
return &rlun->blocks[lun_blk];
}
static inline sector_t rrpc_get_laddr(struct bio *bio)
{
return bio->bi_iter.bi_sector / NR_PHY_IN_LOG;
@@ -206,7 +215,7 @@ static inline int rrpc_lock_laddr(struct rrpc *rrpc, sector_t laddr,
unsigned pages,
struct rrpc_inflight_rq *r)
{
BUG_ON((laddr + pages) > rrpc->nr_pages);
BUG_ON((laddr + pages) > rrpc->nr_sects);
return __rrpc_lock_laddr(rrpc, laddr, pages, r);
}
@@ -243,7 +252,7 @@ static inline void rrpc_unlock_rq(struct rrpc *rrpc, struct nvm_rq *rqd)
struct rrpc_inflight_rq *r = rrpc_get_inflight_rq(rqd);
uint8_t pages = rqd->nr_pages;
BUG_ON((r->l_start + pages) > rrpc->nr_pages);
BUG_ON((r->l_start + pages) > rrpc->nr_sects);
rrpc_unlock_laddr(rrpc, r);
}