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![Hans Holmberg](/assets/img/avatar_default.png)
There is no reason now not to use kvmalloc, so replace the internal metadata allocation scheme. Reviewed-by: Javier González <javier@javigon.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Hans Holmberg <hans@owltronix.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
1358 lines
39 KiB
C
1358 lines
39 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2015 IT University of Copenhagen (rrpc.h)
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* Copyright (C) 2016 CNEX Labs
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* Initial release: Matias Bjorling <matias@cnexlabs.com>
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* Write buffering: Javier Gonzalez <javier@cnexlabs.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* Implementation of a Physical Block-device target for Open-channel SSDs.
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*
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*/
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#ifndef PBLK_H_
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#define PBLK_H_
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#include <linux/blkdev.h>
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#include <linux/blk-mq.h>
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#include <linux/bio.h>
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#include <linux/module.h>
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#include <linux/kthread.h>
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#include <linux/vmalloc.h>
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#include <linux/crc32.h>
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#include <linux/uuid.h>
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#include <linux/lightnvm.h>
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/* Run only GC if less than 1/X blocks are free */
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#define GC_LIMIT_INVERSE 5
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#define GC_TIME_MSECS 1000
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#define PBLK_SECTOR (512)
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#define PBLK_EXPOSED_PAGE_SIZE (4096)
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#define PBLK_NR_CLOSE_JOBS (4)
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#define PBLK_CACHE_NAME_LEN (DISK_NAME_LEN + 16)
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/* Max 512 LUNs per device */
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#define PBLK_MAX_LUNS_BITMAP (4)
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#define NR_PHY_IN_LOG (PBLK_EXPOSED_PAGE_SIZE / PBLK_SECTOR)
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/* Static pool sizes */
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#define PBLK_GEN_WS_POOL_SIZE (2)
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#define PBLK_DEFAULT_OP (11)
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enum {
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PBLK_READ = READ,
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PBLK_WRITE = WRITE,/* Write from write buffer */
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PBLK_WRITE_INT, /* Internal write - no write buffer */
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PBLK_READ_RECOV, /* Recovery read - errors allowed */
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PBLK_ERASE,
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};
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enum {
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/* IO Types */
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PBLK_IOTYPE_USER = 1 << 0,
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PBLK_IOTYPE_GC = 1 << 1,
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/* Write buffer flags */
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PBLK_FLUSH_ENTRY = 1 << 2,
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PBLK_WRITTEN_DATA = 1 << 3,
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PBLK_SUBMITTED_ENTRY = 1 << 4,
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PBLK_WRITABLE_ENTRY = 1 << 5,
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};
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enum {
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PBLK_BLK_ST_OPEN = 0x1,
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PBLK_BLK_ST_CLOSED = 0x2,
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};
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enum {
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PBLK_CHUNK_RESET_START,
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PBLK_CHUNK_RESET_DONE,
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PBLK_CHUNK_RESET_FAILED,
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};
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struct pblk_sec_meta {
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u64 reserved;
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__le64 lba;
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};
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/* The number of GC lists and the rate-limiter states go together. This way the
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* rate-limiter can dictate how much GC is needed based on resource utilization.
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*/
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#define PBLK_GC_NR_LISTS 4
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enum {
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PBLK_RL_OFF = 0,
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PBLK_RL_WERR = 1,
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PBLK_RL_HIGH = 2,
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PBLK_RL_MID = 3,
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PBLK_RL_LOW = 4
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};
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#define pblk_dma_ppa_size (sizeof(u64) * NVM_MAX_VLBA)
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/* write buffer completion context */
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struct pblk_c_ctx {
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struct list_head list; /* Head for out-of-order completion */
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unsigned long *lun_bitmap; /* Luns used on current request */
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unsigned int sentry;
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unsigned int nr_valid;
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unsigned int nr_padded;
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};
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/* read context */
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struct pblk_g_ctx {
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void *private;
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unsigned long start_time;
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u64 lba;
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};
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/* Pad context */
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struct pblk_pad_rq {
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struct pblk *pblk;
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struct completion wait;
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struct kref ref;
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};
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/* Recovery context */
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struct pblk_rec_ctx {
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struct pblk *pblk;
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struct nvm_rq *rqd;
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struct work_struct ws_rec;
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};
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/* Write context */
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struct pblk_w_ctx {
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struct bio_list bios; /* Original bios - used for completion
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* in REQ_FUA, REQ_FLUSH case
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*/
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u64 lba; /* Logic addr. associated with entry */
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struct ppa_addr ppa; /* Physic addr. associated with entry */
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int flags; /* Write context flags */
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};
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struct pblk_rb_entry {
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struct ppa_addr cacheline; /* Cacheline for this entry */
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void *data; /* Pointer to data on this entry */
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struct pblk_w_ctx w_ctx; /* Context for this entry */
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struct list_head index; /* List head to enable indexes */
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};
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#define EMPTY_ENTRY (~0U)
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struct pblk_rb_pages {
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struct page *pages;
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int order;
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struct list_head list;
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};
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struct pblk_rb {
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struct pblk_rb_entry *entries; /* Ring buffer entries */
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unsigned int mem; /* Write offset - points to next
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* writable entry in memory
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*/
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unsigned int subm; /* Read offset - points to last entry
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* that has been submitted to the media
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* to be persisted
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*/
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unsigned int sync; /* Synced - backpointer that signals
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* the last submitted entry that has
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* been successfully persisted to media
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*/
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unsigned int flush_point; /* Sync point - last entry that must be
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* flushed to the media. Used with
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* REQ_FLUSH and REQ_FUA
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*/
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unsigned int l2p_update; /* l2p update point - next entry for
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* which l2p mapping will be updated to
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* contain a device ppa address (instead
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* of a cacheline
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*/
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unsigned int nr_entries; /* Number of entries in write buffer -
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* must be a power of two
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*/
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unsigned int seg_size; /* Size of the data segments being
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* stored on each entry. Typically this
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* will be 4KB
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*/
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unsigned int back_thres; /* Threshold that shall be maintained by
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* the backpointer in order to respect
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* geo->mw_cunits on a per chunk basis
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*/
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struct list_head pages; /* List of data pages */
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spinlock_t w_lock; /* Write lock */
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spinlock_t s_lock; /* Sync lock */
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#ifdef CONFIG_NVM_PBLK_DEBUG
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atomic_t inflight_flush_point; /* Not served REQ_FLUSH | REQ_FUA */
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#endif
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};
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#define PBLK_RECOVERY_SECTORS 16
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struct pblk_lun {
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struct ppa_addr bppa;
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struct semaphore wr_sem;
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};
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struct pblk_gc_rq {
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struct pblk_line *line;
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void *data;
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u64 paddr_list[NVM_MAX_VLBA];
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u64 lba_list[NVM_MAX_VLBA];
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int nr_secs;
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int secs_to_gc;
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struct list_head list;
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};
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struct pblk_gc {
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/* These states are not protected by a lock since (i) they are in the
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* fast path, and (ii) they are not critical.
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*/
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int gc_active;
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int gc_enabled;
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int gc_forced;
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struct task_struct *gc_ts;
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struct task_struct *gc_writer_ts;
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struct task_struct *gc_reader_ts;
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struct workqueue_struct *gc_line_reader_wq;
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struct workqueue_struct *gc_reader_wq;
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struct timer_list gc_timer;
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struct semaphore gc_sem;
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atomic_t read_inflight_gc; /* Number of lines with inflight GC reads */
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atomic_t pipeline_gc; /* Number of lines in the GC pipeline -
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* started reads to finished writes
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*/
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int w_entries;
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struct list_head w_list;
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struct list_head r_list;
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spinlock_t lock;
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spinlock_t w_lock;
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spinlock_t r_lock;
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};
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struct pblk_rl {
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unsigned int high; /* Upper threshold for rate limiter (free run -
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* user I/O rate limiter
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*/
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unsigned int high_pw; /* High rounded up as a power of 2 */
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#define PBLK_USER_HIGH_THRS 8 /* Begin write limit at 12% available blks */
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#define PBLK_USER_LOW_THRS 10 /* Aggressive GC at 10% available blocks */
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int rb_windows_pw; /* Number of rate windows in the write buffer
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* given as a power-of-2. This guarantees that
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* when user I/O is being rate limited, there
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* will be reserved enough space for the GC to
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* place its payload. A window is of
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* pblk->max_write_pgs size, which in NVMe is
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* 64, i.e., 256kb.
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*/
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int rb_budget; /* Total number of entries available for I/O */
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int rb_user_max; /* Max buffer entries available for user I/O */
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int rb_gc_max; /* Max buffer entries available for GC I/O */
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int rb_gc_rsv; /* Reserved buffer entries for GC I/O */
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int rb_state; /* Rate-limiter current state */
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int rb_max_io; /* Maximum size for an I/O giving the config */
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atomic_t rb_user_cnt; /* User I/O buffer counter */
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atomic_t rb_gc_cnt; /* GC I/O buffer counter */
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atomic_t rb_space; /* Space limit in case of reaching capacity */
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int rsv_blocks; /* Reserved blocks for GC */
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int rb_user_active;
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int rb_gc_active;
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atomic_t werr_lines; /* Number of write error lines that needs gc */
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struct timer_list u_timer;
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unsigned long total_blocks;
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atomic_t free_blocks; /* Total number of free blocks (+ OP) */
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atomic_t free_user_blocks; /* Number of user free blocks (no OP) */
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};
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#define PBLK_LINE_EMPTY (~0U)
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enum {
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/* Line Types */
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PBLK_LINETYPE_FREE = 0,
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PBLK_LINETYPE_LOG = 1,
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PBLK_LINETYPE_DATA = 2,
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/* Line state */
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PBLK_LINESTATE_NEW = 9,
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PBLK_LINESTATE_FREE = 10,
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PBLK_LINESTATE_OPEN = 11,
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PBLK_LINESTATE_CLOSED = 12,
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PBLK_LINESTATE_GC = 13,
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PBLK_LINESTATE_BAD = 14,
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PBLK_LINESTATE_CORRUPT = 15,
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/* GC group */
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PBLK_LINEGC_NONE = 20,
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PBLK_LINEGC_EMPTY = 21,
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PBLK_LINEGC_LOW = 22,
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PBLK_LINEGC_MID = 23,
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PBLK_LINEGC_HIGH = 24,
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PBLK_LINEGC_FULL = 25,
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PBLK_LINEGC_WERR = 26
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};
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#define PBLK_MAGIC 0x70626c6b /*pblk*/
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/* emeta/smeta persistent storage format versions:
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* Changes in major version requires offline migration.
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* Changes in minor version are handled automatically during
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* recovery.
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*/
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#define SMETA_VERSION_MAJOR (0)
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#define SMETA_VERSION_MINOR (1)
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#define EMETA_VERSION_MAJOR (0)
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#define EMETA_VERSION_MINOR (2)
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struct line_header {
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__le32 crc;
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__le32 identifier; /* pblk identifier */
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__u8 uuid[16]; /* instance uuid */
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__le16 type; /* line type */
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__u8 version_major; /* version major */
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__u8 version_minor; /* version minor */
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__le32 id; /* line id for current line */
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};
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struct line_smeta {
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struct line_header header;
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__le32 crc; /* Full structure including struct crc */
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/* Previous line metadata */
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__le32 prev_id; /* Line id for previous line */
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/* Current line metadata */
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__le64 seq_nr; /* Sequence number for current line */
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/* Active writers */
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__le32 window_wr_lun; /* Number of parallel LUNs to write */
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__le32 rsvd[2];
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__le64 lun_bitmap[];
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};
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/*
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* Metadata layout in media:
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* First sector:
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* 1. struct line_emeta
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* 2. bad block bitmap (u64 * window_wr_lun)
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* 3. write amplification counters
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* Mid sectors (start at lbas_sector):
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* 3. nr_lbas (u64) forming lba list
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* Last sectors (start at vsc_sector):
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* 4. u32 valid sector count (vsc) for all lines (~0U: free line)
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*/
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struct line_emeta {
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struct line_header header;
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__le32 crc; /* Full structure including struct crc */
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/* Previous line metadata */
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__le32 prev_id; /* Line id for prev line */
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/* Current line metadata */
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__le64 seq_nr; /* Sequence number for current line */
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/* Active writers */
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__le32 window_wr_lun; /* Number of parallel LUNs to write */
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/* Bookkeeping for recovery */
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__le32 next_id; /* Line id for next line */
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__le64 nr_lbas; /* Number of lbas mapped in line */
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__le64 nr_valid_lbas; /* Number of valid lbas mapped in line */
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__le64 bb_bitmap[]; /* Updated bad block bitmap for line */
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};
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/* Write amplification counters stored on media */
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struct wa_counters {
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__le64 user; /* Number of user written sectors */
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__le64 gc; /* Number of sectors written by GC*/
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__le64 pad; /* Number of padded sectors */
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};
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struct pblk_emeta {
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struct line_emeta *buf; /* emeta buffer in media format */
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int mem; /* Write offset - points to next
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* writable entry in memory
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*/
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atomic_t sync; /* Synced - backpointer that signals the
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* last entry that has been successfully
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* persisted to media
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*/
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unsigned int nr_entries; /* Number of emeta entries */
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};
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struct pblk_smeta {
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struct line_smeta *buf; /* smeta buffer in persistent format */
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};
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struct pblk_w_err_gc {
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int has_write_err;
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int has_gc_err;
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__le64 *lba_list;
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};
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struct pblk_line {
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struct pblk *pblk;
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unsigned int id; /* Line number corresponds to the
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* block line
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*/
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unsigned int seq_nr; /* Unique line sequence number */
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int state; /* PBLK_LINESTATE_X */
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int type; /* PBLK_LINETYPE_X */
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int gc_group; /* PBLK_LINEGC_X */
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struct list_head list; /* Free, GC lists */
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unsigned long *lun_bitmap; /* Bitmap for LUNs mapped in line */
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struct nvm_chk_meta *chks; /* Chunks forming line */
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struct pblk_smeta *smeta; /* Start metadata */
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struct pblk_emeta *emeta; /* End medatada */
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int meta_line; /* Metadata line id */
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int meta_distance; /* Distance between data and metadata */
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u64 emeta_ssec; /* Sector where emeta starts */
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unsigned int sec_in_line; /* Number of usable secs in line */
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atomic_t blk_in_line; /* Number of good blocks in line */
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unsigned long *blk_bitmap; /* Bitmap for valid/invalid blocks */
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unsigned long *erase_bitmap; /* Bitmap for erased blocks */
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unsigned long *map_bitmap; /* Bitmap for mapped sectors in line */
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unsigned long *invalid_bitmap; /* Bitmap for invalid sectors in line */
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atomic_t left_eblks; /* Blocks left for erasing */
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atomic_t left_seblks; /* Blocks left for sync erasing */
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int left_msecs; /* Sectors left for mapping */
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unsigned int cur_sec; /* Sector map pointer */
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unsigned int nr_valid_lbas; /* Number of valid lbas in line */
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__le32 *vsc; /* Valid sector count in line */
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struct kref ref; /* Write buffer L2P references */
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atomic_t sec_to_update; /* Outstanding L2P updates to ppa */
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struct pblk_w_err_gc *w_err_gc; /* Write error gc recovery metadata */
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spinlock_t lock; /* Necessary for invalid_bitmap only */
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};
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#define PBLK_DATA_LINES 4
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enum {
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PBLK_EMETA_TYPE_HEADER = 1, /* struct line_emeta first sector */
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PBLK_EMETA_TYPE_LLBA = 2, /* lba list - type: __le64 */
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PBLK_EMETA_TYPE_VSC = 3, /* vsc list - type: __le32 */
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};
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struct pblk_line_mgmt {
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int nr_lines; /* Total number of full lines */
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int nr_free_lines; /* Number of full lines in free list */
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/* Free lists - use free_lock */
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struct list_head free_list; /* Full lines ready to use */
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struct list_head corrupt_list; /* Full lines corrupted */
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struct list_head bad_list; /* Full lines bad */
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/* GC lists - use gc_lock */
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struct list_head *gc_lists[PBLK_GC_NR_LISTS];
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struct list_head gc_high_list; /* Full lines ready to GC, high isc */
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struct list_head gc_mid_list; /* Full lines ready to GC, mid isc */
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struct list_head gc_low_list; /* Full lines ready to GC, low isc */
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struct list_head gc_werr_list; /* Write err recovery list */
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struct list_head gc_full_list; /* Full lines ready to GC, no valid */
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struct list_head gc_empty_list; /* Full lines close, all valid */
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struct pblk_line *log_line; /* Current FTL log line */
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struct pblk_line *data_line; /* Current data line */
|
|
struct pblk_line *log_next; /* Next FTL log line */
|
|
struct pblk_line *data_next; /* Next data line */
|
|
|
|
struct list_head emeta_list; /* Lines queued to schedule emeta */
|
|
|
|
__le32 *vsc_list; /* Valid sector counts for all lines */
|
|
|
|
/* Pre-allocated metadata for data lines */
|
|
struct pblk_smeta *sline_meta[PBLK_DATA_LINES];
|
|
struct pblk_emeta *eline_meta[PBLK_DATA_LINES];
|
|
unsigned long meta_bitmap;
|
|
|
|
/* Cache and mempool for map/invalid bitmaps */
|
|
struct kmem_cache *bitmap_cache;
|
|
mempool_t *bitmap_pool;
|
|
|
|
/* Helpers for fast bitmap calculations */
|
|
unsigned long *bb_template;
|
|
unsigned long *bb_aux;
|
|
|
|
unsigned long d_seq_nr; /* Data line unique sequence number */
|
|
unsigned long l_seq_nr; /* Log line unique sequence number */
|
|
|
|
spinlock_t free_lock;
|
|
spinlock_t close_lock;
|
|
spinlock_t gc_lock;
|
|
};
|
|
|
|
struct pblk_line_meta {
|
|
unsigned int smeta_len; /* Total length for smeta */
|
|
unsigned int smeta_sec; /* Sectors needed for smeta */
|
|
|
|
unsigned int emeta_len[4]; /* Lengths for emeta:
|
|
* [0]: Total
|
|
* [1]: struct line_emeta +
|
|
* bb_bitmap + struct wa_counters
|
|
* [2]: L2P portion
|
|
* [3]: vsc
|
|
*/
|
|
unsigned int emeta_sec[4]; /* Sectors needed for emeta. Same layout
|
|
* as emeta_len
|
|
*/
|
|
|
|
unsigned int emeta_bb; /* Boundary for bb that affects emeta */
|
|
|
|
unsigned int vsc_list_len; /* Length for vsc list */
|
|
unsigned int sec_bitmap_len; /* Length for sector bitmap in line */
|
|
unsigned int blk_bitmap_len; /* Length for block bitmap in line */
|
|
unsigned int lun_bitmap_len; /* Length for lun bitmap in line */
|
|
|
|
unsigned int blk_per_line; /* Number of blocks in a full line */
|
|
unsigned int sec_per_line; /* Number of sectors in a line */
|
|
unsigned int dsec_per_line; /* Number of data sectors in a line */
|
|
unsigned int min_blk_line; /* Min. number of good blocks in line */
|
|
|
|
unsigned int mid_thrs; /* Threshold for GC mid list */
|
|
unsigned int high_thrs; /* Threshold for GC high list */
|
|
|
|
unsigned int meta_distance; /* Distance between data and metadata */
|
|
};
|
|
|
|
enum {
|
|
PBLK_STATE_RUNNING = 0,
|
|
PBLK_STATE_STOPPING = 1,
|
|
PBLK_STATE_RECOVERING = 2,
|
|
PBLK_STATE_STOPPED = 3,
|
|
};
|
|
|
|
/* Internal format to support not power-of-2 device formats */
|
|
struct pblk_addrf {
|
|
/* gen to dev */
|
|
int sec_stripe;
|
|
int ch_stripe;
|
|
int lun_stripe;
|
|
|
|
/* dev to gen */
|
|
int sec_lun_stripe;
|
|
int sec_ws_stripe;
|
|
};
|
|
|
|
struct pblk {
|
|
struct nvm_tgt_dev *dev;
|
|
struct gendisk *disk;
|
|
|
|
struct kobject kobj;
|
|
|
|
struct pblk_lun *luns;
|
|
|
|
struct pblk_line *lines; /* Line array */
|
|
struct pblk_line_mgmt l_mg; /* Line management */
|
|
struct pblk_line_meta lm; /* Line metadata */
|
|
|
|
struct nvm_addrf addrf; /* Aligned address format */
|
|
struct pblk_addrf uaddrf; /* Unaligned address format */
|
|
int addrf_len;
|
|
|
|
struct pblk_rb rwb;
|
|
|
|
int state; /* pblk line state */
|
|
|
|
int min_write_pgs; /* Minimum amount of pages required by controller */
|
|
int min_write_pgs_data; /* Minimum amount of payload pages */
|
|
int max_write_pgs; /* Maximum amount of pages supported by controller */
|
|
int oob_meta_size; /* Size of OOB sector metadata */
|
|
|
|
sector_t capacity; /* Device capacity when bad blocks are subtracted */
|
|
|
|
int op; /* Percentage of device used for over-provisioning */
|
|
int op_blks; /* Number of blocks used for over-provisioning */
|
|
|
|
/* pblk provisioning values. Used by rate limiter */
|
|
struct pblk_rl rl;
|
|
|
|
int sec_per_write;
|
|
|
|
guid_t instance_uuid;
|
|
|
|
/* Persistent write amplification counters, 4kb sector I/Os */
|
|
atomic64_t user_wa; /* Sectors written by user */
|
|
atomic64_t gc_wa; /* Sectors written by GC */
|
|
atomic64_t pad_wa; /* Padded sectors written */
|
|
|
|
/* Reset values for delta write amplification measurements */
|
|
u64 user_rst_wa;
|
|
u64 gc_rst_wa;
|
|
u64 pad_rst_wa;
|
|
|
|
/* Counters used for calculating padding distribution */
|
|
atomic64_t *pad_dist; /* Padding distribution buckets */
|
|
u64 nr_flush_rst; /* Flushes reset value for pad dist.*/
|
|
atomic64_t nr_flush; /* Number of flush/fua I/O */
|
|
|
|
#ifdef CONFIG_NVM_PBLK_DEBUG
|
|
/* Non-persistent debug counters, 4kb sector I/Os */
|
|
atomic_long_t inflight_writes; /* Inflight writes (user and gc) */
|
|
atomic_long_t padded_writes; /* Sectors padded due to flush/fua */
|
|
atomic_long_t padded_wb; /* Sectors padded in write buffer */
|
|
atomic_long_t req_writes; /* Sectors stored on write buffer */
|
|
atomic_long_t sub_writes; /* Sectors submitted from buffer */
|
|
atomic_long_t sync_writes; /* Sectors synced to media */
|
|
atomic_long_t inflight_reads; /* Inflight sector read requests */
|
|
atomic_long_t cache_reads; /* Read requests that hit the cache */
|
|
atomic_long_t sync_reads; /* Completed sector read requests */
|
|
atomic_long_t recov_writes; /* Sectors submitted from recovery */
|
|
atomic_long_t recov_gc_writes; /* Sectors submitted from write GC */
|
|
atomic_long_t recov_gc_reads; /* Sectors submitted from read GC */
|
|
#endif
|
|
|
|
spinlock_t lock;
|
|
|
|
atomic_long_t read_failed;
|
|
atomic_long_t read_empty;
|
|
atomic_long_t read_high_ecc;
|
|
atomic_long_t read_failed_gc;
|
|
atomic_long_t write_failed;
|
|
atomic_long_t erase_failed;
|
|
|
|
atomic_t inflight_io; /* General inflight I/O counter */
|
|
|
|
struct task_struct *writer_ts;
|
|
|
|
/* 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.
|
|
*/
|
|
unsigned char *trans_map;
|
|
spinlock_t trans_lock;
|
|
|
|
struct list_head compl_list;
|
|
|
|
spinlock_t resubmit_lock; /* Resubmit list lock */
|
|
struct list_head resubmit_list; /* Resubmit list for failed writes*/
|
|
|
|
mempool_t page_bio_pool;
|
|
mempool_t gen_ws_pool;
|
|
mempool_t rec_pool;
|
|
mempool_t r_rq_pool;
|
|
mempool_t w_rq_pool;
|
|
mempool_t e_rq_pool;
|
|
|
|
struct workqueue_struct *close_wq;
|
|
struct workqueue_struct *bb_wq;
|
|
struct workqueue_struct *r_end_wq;
|
|
|
|
struct timer_list wtimer;
|
|
|
|
struct pblk_gc gc;
|
|
};
|
|
|
|
struct pblk_line_ws {
|
|
struct pblk *pblk;
|
|
struct pblk_line *line;
|
|
void *priv;
|
|
struct work_struct ws;
|
|
};
|
|
|
|
#define pblk_g_rq_size (sizeof(struct nvm_rq) + sizeof(struct pblk_g_ctx))
|
|
#define pblk_w_rq_size (sizeof(struct nvm_rq) + sizeof(struct pblk_c_ctx))
|
|
|
|
#define pblk_err(pblk, fmt, ...) \
|
|
pr_err("pblk %s: " fmt, pblk->disk->disk_name, ##__VA_ARGS__)
|
|
#define pblk_info(pblk, fmt, ...) \
|
|
pr_info("pblk %s: " fmt, pblk->disk->disk_name, ##__VA_ARGS__)
|
|
#define pblk_warn(pblk, fmt, ...) \
|
|
pr_warn("pblk %s: " fmt, pblk->disk->disk_name, ##__VA_ARGS__)
|
|
#define pblk_debug(pblk, fmt, ...) \
|
|
pr_debug("pblk %s: " fmt, pblk->disk->disk_name, ##__VA_ARGS__)
|
|
|
|
/*
|
|
* pblk ring buffer operations
|
|
*/
|
|
int pblk_rb_init(struct pblk_rb *rb, unsigned int size, unsigned int threshold,
|
|
unsigned int seg_sz);
|
|
int pblk_rb_may_write_user(struct pblk_rb *rb, struct bio *bio,
|
|
unsigned int nr_entries, unsigned int *pos);
|
|
int pblk_rb_may_write_gc(struct pblk_rb *rb, unsigned int nr_entries,
|
|
unsigned int *pos);
|
|
void pblk_rb_write_entry_user(struct pblk_rb *rb, void *data,
|
|
struct pblk_w_ctx w_ctx, unsigned int pos);
|
|
void pblk_rb_write_entry_gc(struct pblk_rb *rb, void *data,
|
|
struct pblk_w_ctx w_ctx, struct pblk_line *line,
|
|
u64 paddr, unsigned int pos);
|
|
struct pblk_w_ctx *pblk_rb_w_ctx(struct pblk_rb *rb, unsigned int pos);
|
|
void pblk_rb_flush(struct pblk_rb *rb);
|
|
|
|
void pblk_rb_sync_l2p(struct pblk_rb *rb);
|
|
unsigned int pblk_rb_read_to_bio(struct pblk_rb *rb, struct nvm_rq *rqd,
|
|
unsigned int pos, unsigned int nr_entries,
|
|
unsigned int count);
|
|
int pblk_rb_copy_to_bio(struct pblk_rb *rb, struct bio *bio, sector_t lba,
|
|
struct ppa_addr ppa);
|
|
unsigned int pblk_rb_read_commit(struct pblk_rb *rb, unsigned int entries);
|
|
|
|
unsigned int pblk_rb_sync_init(struct pblk_rb *rb, unsigned long *flags);
|
|
unsigned int pblk_rb_sync_advance(struct pblk_rb *rb, unsigned int nr_entries);
|
|
unsigned int pblk_rb_ptr_wrap(struct pblk_rb *rb, unsigned int p,
|
|
unsigned int nr_entries);
|
|
void pblk_rb_sync_end(struct pblk_rb *rb, unsigned long *flags);
|
|
unsigned int pblk_rb_flush_point_count(struct pblk_rb *rb);
|
|
|
|
unsigned int pblk_rb_read_count(struct pblk_rb *rb);
|
|
unsigned int pblk_rb_sync_count(struct pblk_rb *rb);
|
|
unsigned int pblk_rb_wrap_pos(struct pblk_rb *rb, unsigned int pos);
|
|
|
|
int pblk_rb_tear_down_check(struct pblk_rb *rb);
|
|
int pblk_rb_pos_oob(struct pblk_rb *rb, u64 pos);
|
|
void pblk_rb_free(struct pblk_rb *rb);
|
|
ssize_t pblk_rb_sysfs(struct pblk_rb *rb, char *buf);
|
|
|
|
/*
|
|
* pblk core
|
|
*/
|
|
struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int type);
|
|
void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int type);
|
|
int pblk_alloc_rqd_meta(struct pblk *pblk, struct nvm_rq *rqd);
|
|
void pblk_free_rqd_meta(struct pblk *pblk, struct nvm_rq *rqd);
|
|
void pblk_set_sec_per_write(struct pblk *pblk, int sec_per_write);
|
|
int pblk_setup_w_rec_rq(struct pblk *pblk, struct nvm_rq *rqd,
|
|
struct pblk_c_ctx *c_ctx);
|
|
void pblk_discard(struct pblk *pblk, struct bio *bio);
|
|
struct nvm_chk_meta *pblk_get_chunk_meta(struct pblk *pblk);
|
|
struct nvm_chk_meta *pblk_chunk_get_off(struct pblk *pblk,
|
|
struct nvm_chk_meta *lp,
|
|
struct ppa_addr ppa);
|
|
void pblk_log_write_err(struct pblk *pblk, struct nvm_rq *rqd);
|
|
void pblk_log_read_err(struct pblk *pblk, struct nvm_rq *rqd);
|
|
int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd, void *buf);
|
|
int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd, void *buf);
|
|
int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line);
|
|
void pblk_check_chunk_state_update(struct pblk *pblk, struct nvm_rq *rqd);
|
|
struct pblk_line *pblk_line_get(struct pblk *pblk);
|
|
struct pblk_line *pblk_line_get_first_data(struct pblk *pblk);
|
|
struct pblk_line *pblk_line_replace_data(struct pblk *pblk);
|
|
void pblk_ppa_to_line_put(struct pblk *pblk, struct ppa_addr ppa);
|
|
void pblk_rq_to_line_put(struct pblk *pblk, struct nvm_rq *rqd);
|
|
int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line);
|
|
void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line);
|
|
struct pblk_line *pblk_line_get_data(struct pblk *pblk);
|
|
struct pblk_line *pblk_line_get_erase(struct pblk *pblk);
|
|
int pblk_line_erase(struct pblk *pblk, struct pblk_line *line);
|
|
int pblk_line_is_full(struct pblk_line *line);
|
|
void pblk_line_free(struct pblk_line *line);
|
|
void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line);
|
|
void pblk_line_close(struct pblk *pblk, struct pblk_line *line);
|
|
void pblk_line_close_ws(struct work_struct *work);
|
|
void pblk_pipeline_stop(struct pblk *pblk);
|
|
void __pblk_pipeline_stop(struct pblk *pblk);
|
|
void __pblk_pipeline_flush(struct pblk *pblk);
|
|
void pblk_gen_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv,
|
|
void (*work)(struct work_struct *), gfp_t gfp_mask,
|
|
struct workqueue_struct *wq);
|
|
u64 pblk_line_smeta_start(struct pblk *pblk, struct pblk_line *line);
|
|
int pblk_line_smeta_read(struct pblk *pblk, struct pblk_line *line);
|
|
int pblk_line_emeta_read(struct pblk *pblk, struct pblk_line *line,
|
|
void *emeta_buf);
|
|
int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr erase_ppa);
|
|
void pblk_line_put(struct kref *ref);
|
|
void pblk_line_put_wq(struct kref *ref);
|
|
struct list_head *pblk_line_gc_list(struct pblk *pblk, struct pblk_line *line);
|
|
u64 pblk_lookup_page(struct pblk *pblk, struct pblk_line *line);
|
|
void pblk_dealloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs);
|
|
u64 pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs);
|
|
u64 __pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs);
|
|
int pblk_calc_secs(struct pblk *pblk, unsigned long secs_avail,
|
|
unsigned long secs_to_flush, bool skip_meta);
|
|
void pblk_down_rq(struct pblk *pblk, struct ppa_addr ppa,
|
|
unsigned long *lun_bitmap);
|
|
void pblk_down_chunk(struct pblk *pblk, struct ppa_addr ppa);
|
|
void pblk_up_chunk(struct pblk *pblk, struct ppa_addr ppa);
|
|
void pblk_up_rq(struct pblk *pblk, unsigned long *lun_bitmap);
|
|
int pblk_bio_add_pages(struct pblk *pblk, struct bio *bio, gfp_t flags,
|
|
int nr_pages);
|
|
void pblk_bio_free_pages(struct pblk *pblk, struct bio *bio, int off,
|
|
int nr_pages);
|
|
void pblk_map_invalidate(struct pblk *pblk, struct ppa_addr ppa);
|
|
void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line,
|
|
u64 paddr);
|
|
void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa);
|
|
void pblk_update_map_cache(struct pblk *pblk, sector_t lba,
|
|
struct ppa_addr ppa);
|
|
void pblk_update_map_dev(struct pblk *pblk, sector_t lba,
|
|
struct ppa_addr ppa, struct ppa_addr entry_line);
|
|
int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa,
|
|
struct pblk_line *gc_line, u64 paddr);
|
|
void pblk_lookup_l2p_rand(struct pblk *pblk, struct ppa_addr *ppas,
|
|
u64 *lba_list, int nr_secs);
|
|
int pblk_lookup_l2p_seq(struct pblk *pblk, struct ppa_addr *ppas,
|
|
sector_t blba, int nr_secs, bool *from_cache);
|
|
void *pblk_get_meta_for_writes(struct pblk *pblk, struct nvm_rq *rqd);
|
|
void pblk_get_packed_meta(struct pblk *pblk, struct nvm_rq *rqd);
|
|
|
|
/*
|
|
* pblk user I/O write path
|
|
*/
|
|
void pblk_write_to_cache(struct pblk *pblk, struct bio *bio,
|
|
unsigned long flags);
|
|
int pblk_write_gc_to_cache(struct pblk *pblk, struct pblk_gc_rq *gc_rq);
|
|
|
|
/*
|
|
* pblk map
|
|
*/
|
|
int pblk_map_erase_rq(struct pblk *pblk, struct nvm_rq *rqd,
|
|
unsigned int sentry, unsigned long *lun_bitmap,
|
|
unsigned int valid_secs, struct ppa_addr *erase_ppa);
|
|
int pblk_map_rq(struct pblk *pblk, struct nvm_rq *rqd, unsigned int sentry,
|
|
unsigned long *lun_bitmap, unsigned int valid_secs,
|
|
unsigned int off);
|
|
|
|
/*
|
|
* pblk write thread
|
|
*/
|
|
int pblk_write_ts(void *data);
|
|
void pblk_write_timer_fn(struct timer_list *t);
|
|
void pblk_write_should_kick(struct pblk *pblk);
|
|
void pblk_write_kick(struct pblk *pblk);
|
|
|
|
/*
|
|
* pblk read path
|
|
*/
|
|
extern struct bio_set pblk_bio_set;
|
|
void pblk_submit_read(struct pblk *pblk, struct bio *bio);
|
|
int pblk_submit_read_gc(struct pblk *pblk, struct pblk_gc_rq *gc_rq);
|
|
/*
|
|
* pblk recovery
|
|
*/
|
|
struct pblk_line *pblk_recov_l2p(struct pblk *pblk);
|
|
int pblk_recov_pad(struct pblk *pblk);
|
|
int pblk_recov_check_emeta(struct pblk *pblk, struct line_emeta *emeta);
|
|
|
|
/*
|
|
* pblk gc
|
|
*/
|
|
#define PBLK_GC_MAX_READERS 8 /* Max number of outstanding GC reader jobs */
|
|
#define PBLK_GC_RQ_QD 128 /* Queue depth for inflight GC requests */
|
|
#define PBLK_GC_L_QD 4 /* Queue depth for inflight GC lines */
|
|
|
|
int pblk_gc_init(struct pblk *pblk);
|
|
void pblk_gc_exit(struct pblk *pblk, bool graceful);
|
|
void pblk_gc_should_start(struct pblk *pblk);
|
|
void pblk_gc_should_stop(struct pblk *pblk);
|
|
void pblk_gc_should_kick(struct pblk *pblk);
|
|
void pblk_gc_free_full_lines(struct pblk *pblk);
|
|
void pblk_gc_sysfs_state_show(struct pblk *pblk, int *gc_enabled,
|
|
int *gc_active);
|
|
int pblk_gc_sysfs_force(struct pblk *pblk, int force);
|
|
void pblk_put_line_back(struct pblk *pblk, struct pblk_line *line);
|
|
|
|
/*
|
|
* pblk rate limiter
|
|
*/
|
|
void pblk_rl_init(struct pblk_rl *rl, int budget, int threshold);
|
|
void pblk_rl_free(struct pblk_rl *rl);
|
|
void pblk_rl_update_rates(struct pblk_rl *rl);
|
|
int pblk_rl_high_thrs(struct pblk_rl *rl);
|
|
unsigned long pblk_rl_nr_free_blks(struct pblk_rl *rl);
|
|
unsigned long pblk_rl_nr_user_free_blks(struct pblk_rl *rl);
|
|
int pblk_rl_user_may_insert(struct pblk_rl *rl, int nr_entries);
|
|
void pblk_rl_inserted(struct pblk_rl *rl, int nr_entries);
|
|
void pblk_rl_user_in(struct pblk_rl *rl, int nr_entries);
|
|
int pblk_rl_gc_may_insert(struct pblk_rl *rl, int nr_entries);
|
|
void pblk_rl_gc_in(struct pblk_rl *rl, int nr_entries);
|
|
void pblk_rl_out(struct pblk_rl *rl, int nr_user, int nr_gc);
|
|
int pblk_rl_max_io(struct pblk_rl *rl);
|
|
void pblk_rl_free_lines_inc(struct pblk_rl *rl, struct pblk_line *line);
|
|
void pblk_rl_free_lines_dec(struct pblk_rl *rl, struct pblk_line *line,
|
|
bool used);
|
|
int pblk_rl_is_limit(struct pblk_rl *rl);
|
|
|
|
void pblk_rl_werr_line_in(struct pblk_rl *rl);
|
|
void pblk_rl_werr_line_out(struct pblk_rl *rl);
|
|
|
|
/*
|
|
* pblk sysfs
|
|
*/
|
|
int pblk_sysfs_init(struct gendisk *tdisk);
|
|
void pblk_sysfs_exit(struct gendisk *tdisk);
|
|
|
|
static inline struct nvm_rq *nvm_rq_from_c_ctx(void *c_ctx)
|
|
{
|
|
return c_ctx - sizeof(struct nvm_rq);
|
|
}
|
|
|
|
static inline void *emeta_to_bb(struct line_emeta *emeta)
|
|
{
|
|
return emeta->bb_bitmap;
|
|
}
|
|
|
|
static inline void *emeta_to_wa(struct pblk_line_meta *lm,
|
|
struct line_emeta *emeta)
|
|
{
|
|
return emeta->bb_bitmap + lm->blk_bitmap_len;
|
|
}
|
|
|
|
static inline void *emeta_to_lbas(struct pblk *pblk, struct line_emeta *emeta)
|
|
{
|
|
return ((void *)emeta + pblk->lm.emeta_len[1]);
|
|
}
|
|
|
|
static inline void *emeta_to_vsc(struct pblk *pblk, struct line_emeta *emeta)
|
|
{
|
|
return (emeta_to_lbas(pblk, emeta) + pblk->lm.emeta_len[2]);
|
|
}
|
|
|
|
static inline int pblk_line_vsc(struct pblk_line *line)
|
|
{
|
|
return le32_to_cpu(*line->vsc);
|
|
}
|
|
|
|
static inline int pblk_ppa_to_line_id(struct ppa_addr p)
|
|
{
|
|
return p.a.blk;
|
|
}
|
|
|
|
static inline struct pblk_line *pblk_ppa_to_line(struct pblk *pblk,
|
|
struct ppa_addr p)
|
|
{
|
|
return &pblk->lines[pblk_ppa_to_line_id(p)];
|
|
}
|
|
|
|
static inline int pblk_ppa_to_pos(struct nvm_geo *geo, struct ppa_addr p)
|
|
{
|
|
return p.a.lun * geo->num_ch + p.a.ch;
|
|
}
|
|
|
|
static inline struct ppa_addr addr_to_gen_ppa(struct pblk *pblk, u64 paddr,
|
|
u64 line_id)
|
|
{
|
|
struct nvm_tgt_dev *dev = pblk->dev;
|
|
struct nvm_geo *geo = &dev->geo;
|
|
struct ppa_addr ppa;
|
|
|
|
if (geo->version == NVM_OCSSD_SPEC_12) {
|
|
struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&pblk->addrf;
|
|
|
|
ppa.ppa = 0;
|
|
ppa.g.blk = line_id;
|
|
ppa.g.pg = (paddr & ppaf->pg_mask) >> ppaf->pg_offset;
|
|
ppa.g.lun = (paddr & ppaf->lun_mask) >> ppaf->lun_offset;
|
|
ppa.g.ch = (paddr & ppaf->ch_mask) >> ppaf->ch_offset;
|
|
ppa.g.pl = (paddr & ppaf->pln_mask) >> ppaf->pln_offset;
|
|
ppa.g.sec = (paddr & ppaf->sec_mask) >> ppaf->sec_offset;
|
|
} else {
|
|
struct pblk_addrf *uaddrf = &pblk->uaddrf;
|
|
int secs, chnls, luns;
|
|
|
|
ppa.ppa = 0;
|
|
|
|
ppa.m.chk = line_id;
|
|
|
|
paddr = div_u64_rem(paddr, uaddrf->sec_stripe, &secs);
|
|
ppa.m.sec = secs;
|
|
|
|
paddr = div_u64_rem(paddr, uaddrf->ch_stripe, &chnls);
|
|
ppa.m.grp = chnls;
|
|
|
|
paddr = div_u64_rem(paddr, uaddrf->lun_stripe, &luns);
|
|
ppa.m.pu = luns;
|
|
|
|
ppa.m.sec += uaddrf->sec_stripe * paddr;
|
|
}
|
|
|
|
return ppa;
|
|
}
|
|
|
|
static inline struct nvm_chk_meta *pblk_dev_ppa_to_chunk(struct pblk *pblk,
|
|
struct ppa_addr p)
|
|
{
|
|
struct nvm_tgt_dev *dev = pblk->dev;
|
|
struct nvm_geo *geo = &dev->geo;
|
|
struct pblk_line *line = pblk_ppa_to_line(pblk, p);
|
|
int pos = pblk_ppa_to_pos(geo, p);
|
|
|
|
return &line->chks[pos];
|
|
}
|
|
|
|
static inline u64 pblk_dev_ppa_to_chunk_addr(struct pblk *pblk,
|
|
struct ppa_addr p)
|
|
{
|
|
struct nvm_tgt_dev *dev = pblk->dev;
|
|
|
|
return dev_to_chunk_addr(dev->parent, &pblk->addrf, p);
|
|
}
|
|
|
|
static inline u64 pblk_dev_ppa_to_line_addr(struct pblk *pblk,
|
|
struct ppa_addr p)
|
|
{
|
|
struct nvm_tgt_dev *dev = pblk->dev;
|
|
struct nvm_geo *geo = &dev->geo;
|
|
u64 paddr;
|
|
|
|
if (geo->version == NVM_OCSSD_SPEC_12) {
|
|
struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&pblk->addrf;
|
|
|
|
paddr = (u64)p.g.ch << ppaf->ch_offset;
|
|
paddr |= (u64)p.g.lun << ppaf->lun_offset;
|
|
paddr |= (u64)p.g.pg << ppaf->pg_offset;
|
|
paddr |= (u64)p.g.pl << ppaf->pln_offset;
|
|
paddr |= (u64)p.g.sec << ppaf->sec_offset;
|
|
} else {
|
|
struct pblk_addrf *uaddrf = &pblk->uaddrf;
|
|
u64 secs = p.m.sec;
|
|
int sec_stripe;
|
|
|
|
paddr = (u64)p.m.grp * uaddrf->sec_stripe;
|
|
paddr += (u64)p.m.pu * uaddrf->sec_lun_stripe;
|
|
|
|
secs = div_u64_rem(secs, uaddrf->sec_stripe, &sec_stripe);
|
|
paddr += secs * uaddrf->sec_ws_stripe;
|
|
paddr += sec_stripe;
|
|
}
|
|
|
|
return paddr;
|
|
}
|
|
|
|
static inline struct ppa_addr pblk_ppa32_to_ppa64(struct pblk *pblk, u32 ppa32)
|
|
{
|
|
struct nvm_tgt_dev *dev = pblk->dev;
|
|
|
|
return nvm_ppa32_to_ppa64(dev->parent, &pblk->addrf, ppa32);
|
|
}
|
|
|
|
static inline u32 pblk_ppa64_to_ppa32(struct pblk *pblk, struct ppa_addr ppa64)
|
|
{
|
|
struct nvm_tgt_dev *dev = pblk->dev;
|
|
|
|
return nvm_ppa64_to_ppa32(dev->parent, &pblk->addrf, ppa64);
|
|
}
|
|
|
|
static inline struct ppa_addr pblk_trans_map_get(struct pblk *pblk,
|
|
sector_t lba)
|
|
{
|
|
struct ppa_addr ppa;
|
|
|
|
if (pblk->addrf_len < 32) {
|
|
u32 *map = (u32 *)pblk->trans_map;
|
|
|
|
ppa = pblk_ppa32_to_ppa64(pblk, map[lba]);
|
|
} else {
|
|
struct ppa_addr *map = (struct ppa_addr *)pblk->trans_map;
|
|
|
|
ppa = map[lba];
|
|
}
|
|
|
|
return ppa;
|
|
}
|
|
|
|
static inline void pblk_trans_map_set(struct pblk *pblk, sector_t lba,
|
|
struct ppa_addr ppa)
|
|
{
|
|
if (pblk->addrf_len < 32) {
|
|
u32 *map = (u32 *)pblk->trans_map;
|
|
|
|
map[lba] = pblk_ppa64_to_ppa32(pblk, ppa);
|
|
} else {
|
|
u64 *map = (u64 *)pblk->trans_map;
|
|
|
|
map[lba] = ppa.ppa;
|
|
}
|
|
}
|
|
|
|
static inline int pblk_ppa_empty(struct ppa_addr ppa_addr)
|
|
{
|
|
return (ppa_addr.ppa == ADDR_EMPTY);
|
|
}
|
|
|
|
static inline void pblk_ppa_set_empty(struct ppa_addr *ppa_addr)
|
|
{
|
|
ppa_addr->ppa = ADDR_EMPTY;
|
|
}
|
|
|
|
static inline bool pblk_ppa_comp(struct ppa_addr lppa, struct ppa_addr rppa)
|
|
{
|
|
return (lppa.ppa == rppa.ppa);
|
|
}
|
|
|
|
static inline int pblk_addr_in_cache(struct ppa_addr ppa)
|
|
{
|
|
return (ppa.ppa != ADDR_EMPTY && ppa.c.is_cached);
|
|
}
|
|
|
|
static inline int pblk_addr_to_cacheline(struct ppa_addr ppa)
|
|
{
|
|
return ppa.c.line;
|
|
}
|
|
|
|
static inline struct ppa_addr pblk_cacheline_to_addr(int addr)
|
|
{
|
|
struct ppa_addr p;
|
|
|
|
p.c.line = addr;
|
|
p.c.is_cached = 1;
|
|
|
|
return p;
|
|
}
|
|
|
|
static inline u32 pblk_calc_meta_header_crc(struct pblk *pblk,
|
|
struct line_header *header)
|
|
{
|
|
u32 crc = ~(u32)0;
|
|
|
|
crc = crc32_le(crc, (unsigned char *)header + sizeof(crc),
|
|
sizeof(struct line_header) - sizeof(crc));
|
|
|
|
return crc;
|
|
}
|
|
|
|
static inline u32 pblk_calc_smeta_crc(struct pblk *pblk,
|
|
struct line_smeta *smeta)
|
|
{
|
|
struct pblk_line_meta *lm = &pblk->lm;
|
|
u32 crc = ~(u32)0;
|
|
|
|
crc = crc32_le(crc, (unsigned char *)smeta +
|
|
sizeof(struct line_header) + sizeof(crc),
|
|
lm->smeta_len -
|
|
sizeof(struct line_header) - sizeof(crc));
|
|
|
|
return crc;
|
|
}
|
|
|
|
static inline u32 pblk_calc_emeta_crc(struct pblk *pblk,
|
|
struct line_emeta *emeta)
|
|
{
|
|
struct pblk_line_meta *lm = &pblk->lm;
|
|
u32 crc = ~(u32)0;
|
|
|
|
crc = crc32_le(crc, (unsigned char *)emeta +
|
|
sizeof(struct line_header) + sizeof(crc),
|
|
lm->emeta_len[0] -
|
|
sizeof(struct line_header) - sizeof(crc));
|
|
|
|
return crc;
|
|
}
|
|
|
|
static inline int pblk_io_aligned(struct pblk *pblk, int nr_secs)
|
|
{
|
|
return !(nr_secs % pblk->min_write_pgs);
|
|
}
|
|
|
|
#ifdef CONFIG_NVM_PBLK_DEBUG
|
|
static inline void print_ppa(struct pblk *pblk, struct ppa_addr *p,
|
|
char *msg, int error)
|
|
{
|
|
struct nvm_geo *geo = &pblk->dev->geo;
|
|
|
|
if (p->c.is_cached) {
|
|
pblk_err(pblk, "ppa: (%s: %x) cache line: %llu\n",
|
|
msg, error, (u64)p->c.line);
|
|
} else if (geo->version == NVM_OCSSD_SPEC_12) {
|
|
pblk_err(pblk, "ppa: (%s: %x):ch:%d,lun:%d,blk:%d,pg:%d,pl:%d,sec:%d\n",
|
|
msg, error,
|
|
p->g.ch, p->g.lun, p->g.blk,
|
|
p->g.pg, p->g.pl, p->g.sec);
|
|
} else {
|
|
pblk_err(pblk, "ppa: (%s: %x):ch:%d,lun:%d,chk:%d,sec:%d\n",
|
|
msg, error,
|
|
p->m.grp, p->m.pu, p->m.chk, p->m.sec);
|
|
}
|
|
}
|
|
|
|
static inline void pblk_print_failed_rqd(struct pblk *pblk, struct nvm_rq *rqd,
|
|
int error)
|
|
{
|
|
int bit = -1;
|
|
|
|
if (rqd->nr_ppas == 1) {
|
|
print_ppa(pblk, &rqd->ppa_addr, "rqd", error);
|
|
return;
|
|
}
|
|
|
|
while ((bit = find_next_bit((void *)&rqd->ppa_status, rqd->nr_ppas,
|
|
bit + 1)) < rqd->nr_ppas) {
|
|
print_ppa(pblk, &rqd->ppa_list[bit], "rqd", error);
|
|
}
|
|
|
|
pblk_err(pblk, "error:%d, ppa_status:%llx\n", error, rqd->ppa_status);
|
|
}
|
|
|
|
static inline int pblk_boundary_ppa_checks(struct nvm_tgt_dev *tgt_dev,
|
|
struct ppa_addr *ppas, int nr_ppas)
|
|
{
|
|
struct nvm_geo *geo = &tgt_dev->geo;
|
|
struct ppa_addr *ppa;
|
|
int i;
|
|
|
|
for (i = 0; i < nr_ppas; i++) {
|
|
ppa = &ppas[i];
|
|
|
|
if (geo->version == NVM_OCSSD_SPEC_12) {
|
|
if (!ppa->c.is_cached &&
|
|
ppa->g.ch < geo->num_ch &&
|
|
ppa->g.lun < geo->num_lun &&
|
|
ppa->g.pl < geo->num_pln &&
|
|
ppa->g.blk < geo->num_chk &&
|
|
ppa->g.pg < geo->num_pg &&
|
|
ppa->g.sec < geo->ws_min)
|
|
continue;
|
|
} else {
|
|
if (!ppa->c.is_cached &&
|
|
ppa->m.grp < geo->num_ch &&
|
|
ppa->m.pu < geo->num_lun &&
|
|
ppa->m.chk < geo->num_chk &&
|
|
ppa->m.sec < geo->clba)
|
|
continue;
|
|
}
|
|
|
|
print_ppa(tgt_dev->q->queuedata, ppa, "boundary", i);
|
|
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static inline int pblk_check_io(struct pblk *pblk, struct nvm_rq *rqd)
|
|
{
|
|
struct nvm_tgt_dev *dev = pblk->dev;
|
|
struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
|
|
|
|
if (pblk_boundary_ppa_checks(dev, ppa_list, rqd->nr_ppas)) {
|
|
WARN_ON(1);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (rqd->opcode == NVM_OP_PWRITE) {
|
|
struct pblk_line *line;
|
|
int i;
|
|
|
|
for (i = 0; i < rqd->nr_ppas; i++) {
|
|
line = pblk_ppa_to_line(pblk, ppa_list[i]);
|
|
|
|
spin_lock(&line->lock);
|
|
if (line->state != PBLK_LINESTATE_OPEN) {
|
|
pblk_err(pblk, "bad ppa: line:%d,state:%d\n",
|
|
line->id, line->state);
|
|
WARN_ON(1);
|
|
spin_unlock(&line->lock);
|
|
return -EINVAL;
|
|
}
|
|
spin_unlock(&line->lock);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static inline int pblk_boundary_paddr_checks(struct pblk *pblk, u64 paddr)
|
|
{
|
|
struct pblk_line_meta *lm = &pblk->lm;
|
|
|
|
if (paddr > lm->sec_per_line)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline unsigned int pblk_get_bi_idx(struct bio *bio)
|
|
{
|
|
return bio->bi_iter.bi_idx;
|
|
}
|
|
|
|
static inline sector_t pblk_get_lba(struct bio *bio)
|
|
{
|
|
return bio->bi_iter.bi_sector / NR_PHY_IN_LOG;
|
|
}
|
|
|
|
static inline unsigned int pblk_get_secs(struct bio *bio)
|
|
{
|
|
return bio->bi_iter.bi_size / PBLK_EXPOSED_PAGE_SIZE;
|
|
}
|
|
|
|
static inline char *pblk_disk_name(struct pblk *pblk)
|
|
{
|
|
struct gendisk *disk = pblk->disk;
|
|
|
|
return disk->disk_name;
|
|
}
|
|
|
|
static inline unsigned int pblk_get_min_chks(struct pblk *pblk)
|
|
{
|
|
struct pblk_line_meta *lm = &pblk->lm;
|
|
/* In a worst-case scenario every line will have OP invalid sectors.
|
|
* We will then need a minimum of 1/OP lines to free up a single line
|
|
*/
|
|
|
|
return DIV_ROUND_UP(100, pblk->op) * lm->blk_per_line;
|
|
}
|
|
|
|
static inline struct pblk_sec_meta *pblk_get_meta(struct pblk *pblk,
|
|
void *meta, int index)
|
|
{
|
|
return meta +
|
|
max_t(int, sizeof(struct pblk_sec_meta), pblk->oob_meta_size)
|
|
* index;
|
|
}
|
|
|
|
static inline int pblk_dma_meta_size(struct pblk *pblk)
|
|
{
|
|
return max_t(int, sizeof(struct pblk_sec_meta), pblk->oob_meta_size)
|
|
* NVM_MAX_VLBA;
|
|
}
|
|
|
|
static inline int pblk_is_oob_meta_supported(struct pblk *pblk)
|
|
{
|
|
return pblk->oob_meta_size >= sizeof(struct pblk_sec_meta);
|
|
}
|
|
#endif /* PBLK_H_ */
|