lightnvm: remove rrpc
The hybrid mode for 1.2 revision was deprecated, and have no users. Remove to make it easier to move to the 2.0 revision. Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Matias Bjørling
Jens Axboe
parent
74ede5af27
commit
aba203d155
|
|
@ -27,13 +27,6 @@ config NVM_DEBUG
|
|||
|
||||
It is required to create/remove targets without IOCTLs.
|
||||
|
||||
config NVM_RRPC
|
||||
tristate "Round-robin Hybrid Open-Channel SSD target"
|
||||
---help---
|
||||
Allows an open-channel SSD to be exposed as a block device to the
|
||||
host. The target is implemented using a linear mapping table and
|
||||
cost-based garbage collection. It is optimized for 4K IO sizes.
|
||||
|
||||
config NVM_PBLK
|
||||
tristate "Physical Block Device Open-Channel SSD target"
|
||||
---help---
|
||||
|
|
|
|||
|
|
@ -4,7 +4,6 @@
|
|||
#
|
||||
|
||||
obj-$(CONFIG_NVM) := core.o
|
||||
obj-$(CONFIG_NVM_RRPC) += rrpc.o
|
||||
obj-$(CONFIG_NVM_PBLK) += pblk.o
|
||||
pblk-y := pblk-init.o pblk-core.o pblk-rb.o \
|
||||
pblk-write.o pblk-cache.o pblk-read.o \
|
||||
|
|
|
|||
File diff suppressed because it is too large
Load Diff
|
|
@ -1,290 +0,0 @@
|
|||
/*
|
||||
* Copyright (C) 2015 IT University of Copenhagen
|
||||
* Initial release: 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.
|
||||
*
|
||||
* Implementation of a Round-robin page-based Hybrid FTL for Open-channel SSDs.
|
||||
*/
|
||||
|
||||
#ifndef RRPC_H_
|
||||
#define RRPC_H_
|
||||
|
||||
#include <linux/blkdev.h>
|
||||
#include <linux/blk-mq.h>
|
||||
#include <linux/bio.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/kthread.h>
|
||||
#include <linux/vmalloc.h>
|
||||
|
||||
#include <linux/lightnvm.h>
|
||||
|
||||
/* Run only GC if less than 1/X blocks are free */
|
||||
#define GC_LIMIT_INVERSE 10
|
||||
#define GC_TIME_SECS 100
|
||||
|
||||
#define RRPC_SECTOR (512)
|
||||
#define RRPC_EXPOSED_PAGE_SIZE (4096)
|
||||
|
||||
#define NR_PHY_IN_LOG (RRPC_EXPOSED_PAGE_SIZE / RRPC_SECTOR)
|
||||
|
||||
struct rrpc_inflight {
|
||||
struct list_head reqs;
|
||||
spinlock_t lock;
|
||||
};
|
||||
|
||||
struct rrpc_inflight_rq {
|
||||
struct list_head list;
|
||||
sector_t l_start;
|
||||
sector_t l_end;
|
||||
};
|
||||
|
||||
struct rrpc_rq {
|
||||
struct rrpc_inflight_rq inflight_rq;
|
||||
unsigned long flags;
|
||||
};
|
||||
|
||||
struct rrpc_block {
|
||||
int id; /* id inside of LUN */
|
||||
struct rrpc_lun *rlun;
|
||||
|
||||
struct list_head prio; /* LUN CG list */
|
||||
struct list_head list; /* LUN free, used, bb list */
|
||||
|
||||
#define MAX_INVALID_PAGES_STORAGE 8
|
||||
/* Bitmap for invalid page intries */
|
||||
unsigned long invalid_pages[MAX_INVALID_PAGES_STORAGE];
|
||||
/* points to the next writable page within a block */
|
||||
unsigned int next_page;
|
||||
/* number of pages that are invalid, wrt host page size */
|
||||
unsigned int nr_invalid_pages;
|
||||
|
||||
int state;
|
||||
|
||||
spinlock_t lock;
|
||||
atomic_t data_cmnt_size; /* data pages committed to stable storage */
|
||||
};
|
||||
|
||||
struct rrpc_lun {
|
||||
struct rrpc *rrpc;
|
||||
|
||||
int id;
|
||||
struct ppa_addr bppa;
|
||||
|
||||
struct rrpc_block *cur, *gc_cur;
|
||||
struct rrpc_block *blocks; /* Reference to block allocation */
|
||||
|
||||
struct list_head prio_list; /* Blocks that may be GC'ed */
|
||||
struct list_head wblk_list; /* Queued blocks to be written to */
|
||||
|
||||
/* lun block lists */
|
||||
struct list_head used_list; /* In-use blocks */
|
||||
struct list_head free_list; /* Not used blocks i.e. released
|
||||
* and ready for use
|
||||
*/
|
||||
struct list_head bb_list; /* Bad blocks. Mutually exclusive with
|
||||
* free_list and used_list
|
||||
*/
|
||||
unsigned int nr_free_blocks; /* Number of unused blocks */
|
||||
|
||||
struct work_struct ws_gc;
|
||||
|
||||
int reserved_blocks;
|
||||
|
||||
spinlock_t lock;
|
||||
};
|
||||
|
||||
struct rrpc {
|
||||
struct nvm_tgt_dev *dev;
|
||||
struct gendisk *disk;
|
||||
|
||||
sector_t soffset; /* logical sector offset */
|
||||
|
||||
int nr_luns;
|
||||
struct rrpc_lun *luns;
|
||||
|
||||
/* calculated values */
|
||||
unsigned long long nr_sects;
|
||||
|
||||
/* Write strategy variables. Move these into each for structure for each
|
||||
* strategy
|
||||
*/
|
||||
atomic_t next_lun; /* Whenever a page is written, this is updated
|
||||
* to point to the next write lun
|
||||
*/
|
||||
|
||||
spinlock_t bio_lock;
|
||||
struct bio_list requeue_bios;
|
||||
struct work_struct ws_requeue;
|
||||
|
||||
/* Simple translation map of logical addresses to physical addresses.
|
||||
* The logical addresses is known by the host system, while the physical
|
||||
* addresses are used when writing to the disk block device.
|
||||
*/
|
||||
struct rrpc_addr *trans_map;
|
||||
/* also store a reverse map for garbage collection */
|
||||
struct rrpc_rev_addr *rev_trans_map;
|
||||
spinlock_t rev_lock;
|
||||
|
||||
struct rrpc_inflight inflights;
|
||||
|
||||
mempool_t *addr_pool;
|
||||
mempool_t *page_pool;
|
||||
mempool_t *gcb_pool;
|
||||
mempool_t *rq_pool;
|
||||
|
||||
struct timer_list gc_timer;
|
||||
struct workqueue_struct *krqd_wq;
|
||||
struct workqueue_struct *kgc_wq;
|
||||
};
|
||||
|
||||
struct rrpc_block_gc {
|
||||
struct rrpc *rrpc;
|
||||
struct rrpc_block *rblk;
|
||||
struct work_struct ws_gc;
|
||||
};
|
||||
|
||||
/* Logical to physical mapping */
|
||||
struct rrpc_addr {
|
||||
u64 addr;
|
||||
struct rrpc_block *rblk;
|
||||
};
|
||||
|
||||
/* Physical to logical mapping */
|
||||
struct rrpc_rev_addr {
|
||||
u64 addr;
|
||||
};
|
||||
|
||||
static inline struct ppa_addr rrpc_linear_to_generic_addr(struct nvm_geo *geo,
|
||||
struct ppa_addr r)
|
||||
{
|
||||
struct ppa_addr l;
|
||||
int secs, pgs;
|
||||
sector_t ppa = r.ppa;
|
||||
|
||||
l.ppa = 0;
|
||||
|
||||
div_u64_rem(ppa, geo->sec_per_pg, &secs);
|
||||
l.g.sec = secs;
|
||||
|
||||
sector_div(ppa, geo->sec_per_pg);
|
||||
div_u64_rem(ppa, geo->pgs_per_blk, &pgs);
|
||||
l.g.pg = pgs;
|
||||
|
||||
return l;
|
||||
}
|
||||
|
||||
static inline struct ppa_addr rrpc_recov_addr(struct nvm_tgt_dev *dev, u64 pba)
|
||||
{
|
||||
return linear_to_generic_addr(&dev->geo, pba);
|
||||
}
|
||||
|
||||
static inline u64 rrpc_blk_to_ppa(struct rrpc *rrpc, struct rrpc_block *rblk)
|
||||
{
|
||||
struct nvm_tgt_dev *dev = rrpc->dev;
|
||||
struct nvm_geo *geo = &dev->geo;
|
||||
struct rrpc_lun *rlun = rblk->rlun;
|
||||
|
||||
return (rlun->id * geo->sec_per_lun) + (rblk->id * geo->sec_per_blk);
|
||||
}
|
||||
|
||||
static inline sector_t rrpc_get_laddr(struct bio *bio)
|
||||
{
|
||||
return bio->bi_iter.bi_sector / NR_PHY_IN_LOG;
|
||||
}
|
||||
|
||||
static inline unsigned int rrpc_get_pages(struct bio *bio)
|
||||
{
|
||||
return bio->bi_iter.bi_size / RRPC_EXPOSED_PAGE_SIZE;
|
||||
}
|
||||
|
||||
static inline sector_t rrpc_get_sector(sector_t laddr)
|
||||
{
|
||||
return laddr * NR_PHY_IN_LOG;
|
||||
}
|
||||
|
||||
static inline int request_intersects(struct rrpc_inflight_rq *r,
|
||||
sector_t laddr_start, sector_t laddr_end)
|
||||
{
|
||||
return (laddr_end >= r->l_start) && (laddr_start <= r->l_end);
|
||||
}
|
||||
|
||||
static int __rrpc_lock_laddr(struct rrpc *rrpc, sector_t laddr,
|
||||
unsigned int pages, struct rrpc_inflight_rq *r)
|
||||
{
|
||||
sector_t laddr_end = laddr + pages - 1;
|
||||
struct rrpc_inflight_rq *rtmp;
|
||||
|
||||
WARN_ON(irqs_disabled());
|
||||
|
||||
spin_lock_irq(&rrpc->inflights.lock);
|
||||
list_for_each_entry(rtmp, &rrpc->inflights.reqs, list) {
|
||||
if (unlikely(request_intersects(rtmp, laddr, laddr_end))) {
|
||||
/* existing, overlapping request, come back later */
|
||||
spin_unlock_irq(&rrpc->inflights.lock);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
r->l_start = laddr;
|
||||
r->l_end = laddr_end;
|
||||
|
||||
list_add_tail(&r->list, &rrpc->inflights.reqs);
|
||||
spin_unlock_irq(&rrpc->inflights.lock);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int rrpc_lock_laddr(struct rrpc *rrpc, sector_t laddr,
|
||||
unsigned int pages,
|
||||
struct rrpc_inflight_rq *r)
|
||||
{
|
||||
BUG_ON((laddr + pages) > rrpc->nr_sects);
|
||||
|
||||
return __rrpc_lock_laddr(rrpc, laddr, pages, r);
|
||||
}
|
||||
|
||||
static inline struct rrpc_inflight_rq *rrpc_get_inflight_rq(struct nvm_rq *rqd)
|
||||
{
|
||||
struct rrpc_rq *rrqd = nvm_rq_to_pdu(rqd);
|
||||
|
||||
return &rrqd->inflight_rq;
|
||||
}
|
||||
|
||||
static inline int rrpc_lock_rq(struct rrpc *rrpc, struct bio *bio,
|
||||
struct nvm_rq *rqd)
|
||||
{
|
||||
sector_t laddr = rrpc_get_laddr(bio);
|
||||
unsigned int pages = rrpc_get_pages(bio);
|
||||
struct rrpc_inflight_rq *r = rrpc_get_inflight_rq(rqd);
|
||||
|
||||
return rrpc_lock_laddr(rrpc, laddr, pages, r);
|
||||
}
|
||||
|
||||
static inline void rrpc_unlock_laddr(struct rrpc *rrpc,
|
||||
struct rrpc_inflight_rq *r)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&rrpc->inflights.lock, flags);
|
||||
list_del_init(&r->list);
|
||||
spin_unlock_irqrestore(&rrpc->inflights.lock, flags);
|
||||
}
|
||||
|
||||
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_ppas;
|
||||
|
||||
BUG_ON((r->l_start + pages) > rrpc->nr_sects);
|
||||
|
||||
rrpc_unlock_laddr(rrpc, r);
|
||||
}
|
||||
|
||||
#endif /* RRPC_H_ */
|
||||
Loading…
Reference in New Issue