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1324 lines
33 KiB
1324 lines
33 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (C) 2015 IT University of Copenhagen (rrpc.c) |
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* Copyright (C) 2016 CNEX Labs |
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* Initial release: Javier Gonzalez <[email protected]> |
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* Matias Bjorling <[email protected]> |
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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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* pblk-init.c - pblk's initialization. |
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*/ |
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|
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#include "pblk.h" |
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#include "pblk-trace.h" |
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|
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static unsigned int write_buffer_size; |
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|
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module_param(write_buffer_size, uint, 0644); |
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MODULE_PARM_DESC(write_buffer_size, "number of entries in a write buffer"); |
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|
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struct pblk_global_caches { |
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struct kmem_cache *ws; |
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struct kmem_cache *rec; |
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struct kmem_cache *g_rq; |
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struct kmem_cache *w_rq; |
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|
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struct kref kref; |
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|
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struct mutex mutex; /* Ensures consistency between |
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* caches and kref |
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*/ |
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}; |
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|
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static struct pblk_global_caches pblk_caches = { |
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.mutex = __MUTEX_INITIALIZER(pblk_caches.mutex), |
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.kref = KREF_INIT(0), |
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}; |
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|
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struct bio_set pblk_bio_set; |
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|
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static blk_qc_t pblk_submit_bio(struct bio *bio) |
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{ |
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struct pblk *pblk = bio->bi_disk->queue->queuedata; |
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|
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if (bio_op(bio) == REQ_OP_DISCARD) { |
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pblk_discard(pblk, bio); |
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if (!(bio->bi_opf & REQ_PREFLUSH)) { |
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bio_endio(bio); |
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return BLK_QC_T_NONE; |
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} |
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} |
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|
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/* Read requests must be <= 256kb due to NVMe's 64 bit completion bitmap |
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* constraint. Writes can be of arbitrary size. |
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*/ |
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if (bio_data_dir(bio) == READ) { |
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blk_queue_split(&bio); |
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pblk_submit_read(pblk, bio); |
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} else { |
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/* Prevent deadlock in the case of a modest LUN configuration |
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* and large user I/Os. Unless stalled, the rate limiter |
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* leaves at least 256KB available for user I/O. |
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*/ |
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if (pblk_get_secs(bio) > pblk_rl_max_io(&pblk->rl)) |
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blk_queue_split(&bio); |
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|
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pblk_write_to_cache(pblk, bio, PBLK_IOTYPE_USER); |
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} |
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|
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return BLK_QC_T_NONE; |
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} |
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|
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static const struct block_device_operations pblk_bops = { |
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.owner = THIS_MODULE, |
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.submit_bio = pblk_submit_bio, |
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}; |
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|
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|
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static size_t pblk_trans_map_size(struct pblk *pblk) |
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{ |
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int entry_size = 8; |
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|
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if (pblk->addrf_len < 32) |
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entry_size = 4; |
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|
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return entry_size * pblk->capacity; |
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} |
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|
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#ifdef CONFIG_NVM_PBLK_DEBUG |
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static u32 pblk_l2p_crc(struct pblk *pblk) |
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{ |
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size_t map_size; |
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u32 crc = ~(u32)0; |
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|
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map_size = pblk_trans_map_size(pblk); |
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crc = crc32_le(crc, pblk->trans_map, map_size); |
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return crc; |
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} |
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#endif |
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|
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static void pblk_l2p_free(struct pblk *pblk) |
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{ |
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vfree(pblk->trans_map); |
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} |
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|
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static int pblk_l2p_recover(struct pblk *pblk, bool factory_init) |
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{ |
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struct pblk_line *line = NULL; |
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|
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if (factory_init) { |
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guid_gen(&pblk->instance_uuid); |
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} else { |
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line = pblk_recov_l2p(pblk); |
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if (IS_ERR(line)) { |
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pblk_err(pblk, "could not recover l2p table\n"); |
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return -EFAULT; |
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} |
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} |
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|
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#ifdef CONFIG_NVM_PBLK_DEBUG |
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pblk_info(pblk, "init: L2P CRC: %x\n", pblk_l2p_crc(pblk)); |
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#endif |
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|
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/* Free full lines directly as GC has not been started yet */ |
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pblk_gc_free_full_lines(pblk); |
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|
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if (!line) { |
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/* Configure next line for user data */ |
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line = pblk_line_get_first_data(pblk); |
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if (!line) |
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return -EFAULT; |
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} |
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|
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return 0; |
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} |
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|
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static int pblk_l2p_init(struct pblk *pblk, bool factory_init) |
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{ |
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sector_t i; |
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struct ppa_addr ppa; |
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size_t map_size; |
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int ret = 0; |
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|
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map_size = pblk_trans_map_size(pblk); |
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pblk->trans_map = __vmalloc(map_size, GFP_KERNEL | __GFP_NOWARN | |
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__GFP_RETRY_MAYFAIL | __GFP_HIGHMEM); |
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if (!pblk->trans_map) { |
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pblk_err(pblk, "failed to allocate L2P (need %zu of memory)\n", |
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map_size); |
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return -ENOMEM; |
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} |
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|
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pblk_ppa_set_empty(&ppa); |
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|
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for (i = 0; i < pblk->capacity; i++) |
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pblk_trans_map_set(pblk, i, ppa); |
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|
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ret = pblk_l2p_recover(pblk, factory_init); |
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if (ret) |
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vfree(pblk->trans_map); |
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|
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return ret; |
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} |
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|
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static void pblk_rwb_free(struct pblk *pblk) |
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{ |
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if (pblk_rb_tear_down_check(&pblk->rwb)) |
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pblk_err(pblk, "write buffer error on tear down\n"); |
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|
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pblk_rb_free(&pblk->rwb); |
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} |
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|
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static int pblk_rwb_init(struct pblk *pblk) |
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{ |
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struct nvm_tgt_dev *dev = pblk->dev; |
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struct nvm_geo *geo = &dev->geo; |
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unsigned long buffer_size; |
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int pgs_in_buffer, threshold; |
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|
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threshold = geo->mw_cunits * geo->all_luns; |
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pgs_in_buffer = (max(geo->mw_cunits, geo->ws_opt) + geo->ws_opt) |
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* geo->all_luns; |
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|
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if (write_buffer_size && (write_buffer_size > pgs_in_buffer)) |
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buffer_size = write_buffer_size; |
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else |
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buffer_size = pgs_in_buffer; |
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|
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return pblk_rb_init(&pblk->rwb, buffer_size, threshold, geo->csecs); |
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} |
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|
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static int pblk_set_addrf_12(struct pblk *pblk, struct nvm_geo *geo, |
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struct nvm_addrf_12 *dst) |
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{ |
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struct nvm_addrf_12 *src = (struct nvm_addrf_12 *)&geo->addrf; |
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int power_len; |
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|
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/* Re-calculate channel and lun format to adapt to configuration */ |
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power_len = get_count_order(geo->num_ch); |
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if (1 << power_len != geo->num_ch) { |
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pblk_err(pblk, "supports only power-of-two channel config.\n"); |
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return -EINVAL; |
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} |
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dst->ch_len = power_len; |
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|
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power_len = get_count_order(geo->num_lun); |
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if (1 << power_len != geo->num_lun) { |
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pblk_err(pblk, "supports only power-of-two LUN config.\n"); |
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return -EINVAL; |
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} |
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dst->lun_len = power_len; |
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|
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dst->blk_len = src->blk_len; |
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dst->pg_len = src->pg_len; |
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dst->pln_len = src->pln_len; |
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dst->sec_len = src->sec_len; |
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|
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dst->sec_offset = 0; |
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dst->pln_offset = dst->sec_len; |
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dst->ch_offset = dst->pln_offset + dst->pln_len; |
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dst->lun_offset = dst->ch_offset + dst->ch_len; |
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dst->pg_offset = dst->lun_offset + dst->lun_len; |
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dst->blk_offset = dst->pg_offset + dst->pg_len; |
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|
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dst->sec_mask = ((1ULL << dst->sec_len) - 1) << dst->sec_offset; |
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dst->pln_mask = ((1ULL << dst->pln_len) - 1) << dst->pln_offset; |
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dst->ch_mask = ((1ULL << dst->ch_len) - 1) << dst->ch_offset; |
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dst->lun_mask = ((1ULL << dst->lun_len) - 1) << dst->lun_offset; |
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dst->pg_mask = ((1ULL << dst->pg_len) - 1) << dst->pg_offset; |
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dst->blk_mask = ((1ULL << dst->blk_len) - 1) << dst->blk_offset; |
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|
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return dst->blk_offset + src->blk_len; |
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} |
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|
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static int pblk_set_addrf_20(struct nvm_geo *geo, struct nvm_addrf *adst, |
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struct pblk_addrf *udst) |
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{ |
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struct nvm_addrf *src = &geo->addrf; |
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|
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adst->ch_len = get_count_order(geo->num_ch); |
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adst->lun_len = get_count_order(geo->num_lun); |
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adst->chk_len = src->chk_len; |
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adst->sec_len = src->sec_len; |
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|
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adst->sec_offset = 0; |
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adst->ch_offset = adst->sec_len; |
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adst->lun_offset = adst->ch_offset + adst->ch_len; |
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adst->chk_offset = adst->lun_offset + adst->lun_len; |
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|
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adst->sec_mask = ((1ULL << adst->sec_len) - 1) << adst->sec_offset; |
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adst->chk_mask = ((1ULL << adst->chk_len) - 1) << adst->chk_offset; |
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adst->lun_mask = ((1ULL << adst->lun_len) - 1) << adst->lun_offset; |
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adst->ch_mask = ((1ULL << adst->ch_len) - 1) << adst->ch_offset; |
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|
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udst->sec_stripe = geo->ws_opt; |
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udst->ch_stripe = geo->num_ch; |
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udst->lun_stripe = geo->num_lun; |
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|
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udst->sec_lun_stripe = udst->sec_stripe * udst->ch_stripe; |
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udst->sec_ws_stripe = udst->sec_lun_stripe * udst->lun_stripe; |
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return adst->chk_offset + adst->chk_len; |
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} |
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static int pblk_set_addrf(struct pblk *pblk) |
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{ |
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struct nvm_tgt_dev *dev = pblk->dev; |
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struct nvm_geo *geo = &dev->geo; |
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int mod; |
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|
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switch (geo->version) { |
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case NVM_OCSSD_SPEC_12: |
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div_u64_rem(geo->clba, pblk->min_write_pgs, &mod); |
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if (mod) { |
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pblk_err(pblk, "bad configuration of sectors/pages\n"); |
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return -EINVAL; |
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} |
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|
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pblk->addrf_len = pblk_set_addrf_12(pblk, geo, |
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(void *)&pblk->addrf); |
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break; |
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case NVM_OCSSD_SPEC_20: |
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pblk->addrf_len = pblk_set_addrf_20(geo, (void *)&pblk->addrf, |
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&pblk->uaddrf); |
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break; |
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default: |
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pblk_err(pblk, "OCSSD revision not supported (%d)\n", |
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geo->version); |
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return -EINVAL; |
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} |
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|
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return 0; |
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} |
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|
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static int pblk_create_global_caches(void) |
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{ |
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|
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pblk_caches.ws = kmem_cache_create("pblk_blk_ws", |
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sizeof(struct pblk_line_ws), 0, 0, NULL); |
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if (!pblk_caches.ws) |
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return -ENOMEM; |
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|
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pblk_caches.rec = kmem_cache_create("pblk_rec", |
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sizeof(struct pblk_rec_ctx), 0, 0, NULL); |
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if (!pblk_caches.rec) |
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goto fail_destroy_ws; |
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|
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pblk_caches.g_rq = kmem_cache_create("pblk_g_rq", pblk_g_rq_size, |
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0, 0, NULL); |
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if (!pblk_caches.g_rq) |
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goto fail_destroy_rec; |
|
|
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pblk_caches.w_rq = kmem_cache_create("pblk_w_rq", pblk_w_rq_size, |
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0, 0, NULL); |
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if (!pblk_caches.w_rq) |
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goto fail_destroy_g_rq; |
|
|
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return 0; |
|
|
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fail_destroy_g_rq: |
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kmem_cache_destroy(pblk_caches.g_rq); |
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fail_destroy_rec: |
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kmem_cache_destroy(pblk_caches.rec); |
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fail_destroy_ws: |
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kmem_cache_destroy(pblk_caches.ws); |
|
|
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return -ENOMEM; |
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} |
|
|
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static int pblk_get_global_caches(void) |
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{ |
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int ret = 0; |
|
|
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mutex_lock(&pblk_caches.mutex); |
|
|
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if (kref_get_unless_zero(&pblk_caches.kref)) |
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goto out; |
|
|
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ret = pblk_create_global_caches(); |
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if (!ret) |
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kref_init(&pblk_caches.kref); |
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|
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out: |
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mutex_unlock(&pblk_caches.mutex); |
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return ret; |
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} |
|
|
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static void pblk_destroy_global_caches(struct kref *ref) |
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{ |
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struct pblk_global_caches *c; |
|
|
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c = container_of(ref, struct pblk_global_caches, kref); |
|
|
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kmem_cache_destroy(c->ws); |
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kmem_cache_destroy(c->rec); |
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kmem_cache_destroy(c->g_rq); |
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kmem_cache_destroy(c->w_rq); |
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} |
|
|
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static void pblk_put_global_caches(void) |
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{ |
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mutex_lock(&pblk_caches.mutex); |
|
kref_put(&pblk_caches.kref, pblk_destroy_global_caches); |
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mutex_unlock(&pblk_caches.mutex); |
|
} |
|
|
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static int pblk_core_init(struct pblk *pblk) |
|
{ |
|
struct nvm_tgt_dev *dev = pblk->dev; |
|
struct nvm_geo *geo = &dev->geo; |
|
int ret, max_write_ppas; |
|
|
|
atomic64_set(&pblk->user_wa, 0); |
|
atomic64_set(&pblk->pad_wa, 0); |
|
atomic64_set(&pblk->gc_wa, 0); |
|
pblk->user_rst_wa = 0; |
|
pblk->pad_rst_wa = 0; |
|
pblk->gc_rst_wa = 0; |
|
|
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atomic64_set(&pblk->nr_flush, 0); |
|
pblk->nr_flush_rst = 0; |
|
|
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pblk->min_write_pgs = geo->ws_opt; |
|
pblk->min_write_pgs_data = pblk->min_write_pgs; |
|
max_write_ppas = pblk->min_write_pgs * geo->all_luns; |
|
pblk->max_write_pgs = min_t(int, max_write_ppas, NVM_MAX_VLBA); |
|
pblk->max_write_pgs = min_t(int, pblk->max_write_pgs, |
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queue_max_hw_sectors(dev->q) / (geo->csecs >> SECTOR_SHIFT)); |
|
pblk_set_sec_per_write(pblk, pblk->min_write_pgs); |
|
|
|
pblk->oob_meta_size = geo->sos; |
|
if (!pblk_is_oob_meta_supported(pblk)) { |
|
/* For drives which does not have OOB metadata feature |
|
* in order to support recovery feature we need to use |
|
* so called packed metadata. Packed metada will store |
|
* the same information as OOB metadata (l2p table mapping, |
|
* but in the form of the single page at the end of |
|
* every write request. |
|
*/ |
|
if (pblk->min_write_pgs |
|
* sizeof(struct pblk_sec_meta) > PAGE_SIZE) { |
|
/* We want to keep all the packed metadata on single |
|
* page per write requests. So we need to ensure that |
|
* it will fit. |
|
* |
|
* This is more like sanity check, since there is |
|
* no device with such a big minimal write size |
|
* (above 1 metabytes). |
|
*/ |
|
pblk_err(pblk, "Not supported min write size\n"); |
|
return -EINVAL; |
|
} |
|
/* For packed meta approach we do some simplification. |
|
* On read path we always issue requests which size |
|
* equal to max_write_pgs, with all pages filled with |
|
* user payload except of last one page which will be |
|
* filled with packed metadata. |
|
*/ |
|
pblk->max_write_pgs = pblk->min_write_pgs; |
|
pblk->min_write_pgs_data = pblk->min_write_pgs - 1; |
|
} |
|
|
|
pblk->pad_dist = kcalloc(pblk->min_write_pgs - 1, sizeof(atomic64_t), |
|
GFP_KERNEL); |
|
if (!pblk->pad_dist) |
|
return -ENOMEM; |
|
|
|
if (pblk_get_global_caches()) |
|
goto fail_free_pad_dist; |
|
|
|
/* Internal bios can be at most the sectors signaled by the device. */ |
|
ret = mempool_init_page_pool(&pblk->page_bio_pool, NVM_MAX_VLBA, 0); |
|
if (ret) |
|
goto free_global_caches; |
|
|
|
ret = mempool_init_slab_pool(&pblk->gen_ws_pool, PBLK_GEN_WS_POOL_SIZE, |
|
pblk_caches.ws); |
|
if (ret) |
|
goto free_page_bio_pool; |
|
|
|
ret = mempool_init_slab_pool(&pblk->rec_pool, geo->all_luns, |
|
pblk_caches.rec); |
|
if (ret) |
|
goto free_gen_ws_pool; |
|
|
|
ret = mempool_init_slab_pool(&pblk->r_rq_pool, geo->all_luns, |
|
pblk_caches.g_rq); |
|
if (ret) |
|
goto free_rec_pool; |
|
|
|
ret = mempool_init_slab_pool(&pblk->e_rq_pool, geo->all_luns, |
|
pblk_caches.g_rq); |
|
if (ret) |
|
goto free_r_rq_pool; |
|
|
|
ret = mempool_init_slab_pool(&pblk->w_rq_pool, geo->all_luns, |
|
pblk_caches.w_rq); |
|
if (ret) |
|
goto free_e_rq_pool; |
|
|
|
pblk->close_wq = alloc_workqueue("pblk-close-wq", |
|
WQ_MEM_RECLAIM | WQ_UNBOUND, PBLK_NR_CLOSE_JOBS); |
|
if (!pblk->close_wq) |
|
goto free_w_rq_pool; |
|
|
|
pblk->bb_wq = alloc_workqueue("pblk-bb-wq", |
|
WQ_MEM_RECLAIM | WQ_UNBOUND, 0); |
|
if (!pblk->bb_wq) |
|
goto free_close_wq; |
|
|
|
pblk->r_end_wq = alloc_workqueue("pblk-read-end-wq", |
|
WQ_MEM_RECLAIM | WQ_UNBOUND, 0); |
|
if (!pblk->r_end_wq) |
|
goto free_bb_wq; |
|
|
|
if (pblk_set_addrf(pblk)) |
|
goto free_r_end_wq; |
|
|
|
INIT_LIST_HEAD(&pblk->compl_list); |
|
INIT_LIST_HEAD(&pblk->resubmit_list); |
|
|
|
return 0; |
|
|
|
free_r_end_wq: |
|
destroy_workqueue(pblk->r_end_wq); |
|
free_bb_wq: |
|
destroy_workqueue(pblk->bb_wq); |
|
free_close_wq: |
|
destroy_workqueue(pblk->close_wq); |
|
free_w_rq_pool: |
|
mempool_exit(&pblk->w_rq_pool); |
|
free_e_rq_pool: |
|
mempool_exit(&pblk->e_rq_pool); |
|
free_r_rq_pool: |
|
mempool_exit(&pblk->r_rq_pool); |
|
free_rec_pool: |
|
mempool_exit(&pblk->rec_pool); |
|
free_gen_ws_pool: |
|
mempool_exit(&pblk->gen_ws_pool); |
|
free_page_bio_pool: |
|
mempool_exit(&pblk->page_bio_pool); |
|
free_global_caches: |
|
pblk_put_global_caches(); |
|
fail_free_pad_dist: |
|
kfree(pblk->pad_dist); |
|
return -ENOMEM; |
|
} |
|
|
|
static void pblk_core_free(struct pblk *pblk) |
|
{ |
|
if (pblk->close_wq) |
|
destroy_workqueue(pblk->close_wq); |
|
|
|
if (pblk->r_end_wq) |
|
destroy_workqueue(pblk->r_end_wq); |
|
|
|
if (pblk->bb_wq) |
|
destroy_workqueue(pblk->bb_wq); |
|
|
|
mempool_exit(&pblk->page_bio_pool); |
|
mempool_exit(&pblk->gen_ws_pool); |
|
mempool_exit(&pblk->rec_pool); |
|
mempool_exit(&pblk->r_rq_pool); |
|
mempool_exit(&pblk->e_rq_pool); |
|
mempool_exit(&pblk->w_rq_pool); |
|
|
|
pblk_put_global_caches(); |
|
kfree(pblk->pad_dist); |
|
} |
|
|
|
static void pblk_line_mg_free(struct pblk *pblk) |
|
{ |
|
struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
|
int i; |
|
|
|
kfree(l_mg->bb_template); |
|
kfree(l_mg->bb_aux); |
|
kfree(l_mg->vsc_list); |
|
|
|
for (i = 0; i < PBLK_DATA_LINES; i++) { |
|
kfree(l_mg->sline_meta[i]); |
|
kvfree(l_mg->eline_meta[i]->buf); |
|
kfree(l_mg->eline_meta[i]); |
|
} |
|
|
|
mempool_destroy(l_mg->bitmap_pool); |
|
kmem_cache_destroy(l_mg->bitmap_cache); |
|
} |
|
|
|
static void pblk_line_meta_free(struct pblk_line_mgmt *l_mg, |
|
struct pblk_line *line) |
|
{ |
|
struct pblk_w_err_gc *w_err_gc = line->w_err_gc; |
|
|
|
kfree(line->blk_bitmap); |
|
kfree(line->erase_bitmap); |
|
kfree(line->chks); |
|
|
|
kvfree(w_err_gc->lba_list); |
|
kfree(w_err_gc); |
|
} |
|
|
|
static void pblk_lines_free(struct pblk *pblk) |
|
{ |
|
struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
|
struct pblk_line *line; |
|
int i; |
|
|
|
for (i = 0; i < l_mg->nr_lines; i++) { |
|
line = &pblk->lines[i]; |
|
|
|
pblk_line_free(line); |
|
pblk_line_meta_free(l_mg, line); |
|
} |
|
|
|
pblk_line_mg_free(pblk); |
|
|
|
kfree(pblk->luns); |
|
kfree(pblk->lines); |
|
} |
|
|
|
static int pblk_luns_init(struct pblk *pblk) |
|
{ |
|
struct nvm_tgt_dev *dev = pblk->dev; |
|
struct nvm_geo *geo = &dev->geo; |
|
struct pblk_lun *rlun; |
|
int i; |
|
|
|
/* TODO: Implement unbalanced LUN support */ |
|
if (geo->num_lun < 0) { |
|
pblk_err(pblk, "unbalanced LUN config.\n"); |
|
return -EINVAL; |
|
} |
|
|
|
pblk->luns = kcalloc(geo->all_luns, sizeof(struct pblk_lun), |
|
GFP_KERNEL); |
|
if (!pblk->luns) |
|
return -ENOMEM; |
|
|
|
for (i = 0; i < geo->all_luns; i++) { |
|
/* Stripe across channels */ |
|
int ch = i % geo->num_ch; |
|
int lun_raw = i / geo->num_ch; |
|
int lunid = lun_raw + ch * geo->num_lun; |
|
|
|
rlun = &pblk->luns[i]; |
|
rlun->bppa = dev->luns[lunid]; |
|
|
|
sema_init(&rlun->wr_sem, 1); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/* See comment over struct line_emeta definition */ |
|
static unsigned int calc_emeta_len(struct pblk *pblk) |
|
{ |
|
struct pblk_line_meta *lm = &pblk->lm; |
|
struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
|
struct nvm_tgt_dev *dev = pblk->dev; |
|
struct nvm_geo *geo = &dev->geo; |
|
|
|
/* Round to sector size so that lba_list starts on its own sector */ |
|
lm->emeta_sec[1] = DIV_ROUND_UP( |
|
sizeof(struct line_emeta) + lm->blk_bitmap_len + |
|
sizeof(struct wa_counters), geo->csecs); |
|
lm->emeta_len[1] = lm->emeta_sec[1] * geo->csecs; |
|
|
|
/* Round to sector size so that vsc_list starts on its own sector */ |
|
lm->dsec_per_line = lm->sec_per_line - lm->emeta_sec[0]; |
|
lm->emeta_sec[2] = DIV_ROUND_UP(lm->dsec_per_line * sizeof(u64), |
|
geo->csecs); |
|
lm->emeta_len[2] = lm->emeta_sec[2] * geo->csecs; |
|
|
|
lm->emeta_sec[3] = DIV_ROUND_UP(l_mg->nr_lines * sizeof(u32), |
|
geo->csecs); |
|
lm->emeta_len[3] = lm->emeta_sec[3] * geo->csecs; |
|
|
|
lm->vsc_list_len = l_mg->nr_lines * sizeof(u32); |
|
|
|
return (lm->emeta_len[1] + lm->emeta_len[2] + lm->emeta_len[3]); |
|
} |
|
|
|
static int pblk_set_provision(struct pblk *pblk, int nr_free_chks) |
|
{ |
|
struct nvm_tgt_dev *dev = pblk->dev; |
|
struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
|
struct pblk_line_meta *lm = &pblk->lm; |
|
struct nvm_geo *geo = &dev->geo; |
|
sector_t provisioned; |
|
int sec_meta, blk_meta, clba; |
|
int minimum; |
|
|
|
if (geo->op == NVM_TARGET_DEFAULT_OP) |
|
pblk->op = PBLK_DEFAULT_OP; |
|
else |
|
pblk->op = geo->op; |
|
|
|
minimum = pblk_get_min_chks(pblk); |
|
provisioned = nr_free_chks; |
|
provisioned *= (100 - pblk->op); |
|
sector_div(provisioned, 100); |
|
|
|
if ((nr_free_chks - provisioned) < minimum) { |
|
if (geo->op != NVM_TARGET_DEFAULT_OP) { |
|
pblk_err(pblk, "OP too small to create a sane instance\n"); |
|
return -EINTR; |
|
} |
|
|
|
/* If the user did not specify an OP value, and PBLK_DEFAULT_OP |
|
* is not enough, calculate and set sane value |
|
*/ |
|
|
|
provisioned = nr_free_chks - minimum; |
|
pblk->op = (100 * minimum) / nr_free_chks; |
|
pblk_info(pblk, "Default OP insufficient, adjusting OP to %d\n", |
|
pblk->op); |
|
} |
|
|
|
pblk->op_blks = nr_free_chks - provisioned; |
|
|
|
/* Internally pblk manages all free blocks, but all calculations based |
|
* on user capacity consider only provisioned blocks |
|
*/ |
|
pblk->rl.total_blocks = nr_free_chks; |
|
|
|
/* Consider sectors used for metadata */ |
|
sec_meta = (lm->smeta_sec + lm->emeta_sec[0]) * l_mg->nr_free_lines; |
|
blk_meta = DIV_ROUND_UP(sec_meta, geo->clba); |
|
|
|
clba = (geo->clba / pblk->min_write_pgs) * pblk->min_write_pgs_data; |
|
pblk->capacity = (provisioned - blk_meta) * clba; |
|
|
|
atomic_set(&pblk->rl.free_blocks, nr_free_chks); |
|
atomic_set(&pblk->rl.free_user_blocks, nr_free_chks); |
|
|
|
return 0; |
|
} |
|
|
|
static int pblk_setup_line_meta_chk(struct pblk *pblk, struct pblk_line *line, |
|
struct nvm_chk_meta *meta) |
|
{ |
|
struct nvm_tgt_dev *dev = pblk->dev; |
|
struct nvm_geo *geo = &dev->geo; |
|
struct pblk_line_meta *lm = &pblk->lm; |
|
int i, nr_bad_chks = 0; |
|
|
|
for (i = 0; i < lm->blk_per_line; i++) { |
|
struct pblk_lun *rlun = &pblk->luns[i]; |
|
struct nvm_chk_meta *chunk; |
|
struct nvm_chk_meta *chunk_meta; |
|
struct ppa_addr ppa; |
|
int pos; |
|
|
|
ppa = rlun->bppa; |
|
pos = pblk_ppa_to_pos(geo, ppa); |
|
chunk = &line->chks[pos]; |
|
|
|
ppa.m.chk = line->id; |
|
chunk_meta = pblk_chunk_get_off(pblk, meta, ppa); |
|
|
|
chunk->state = chunk_meta->state; |
|
chunk->type = chunk_meta->type; |
|
chunk->wi = chunk_meta->wi; |
|
chunk->slba = chunk_meta->slba; |
|
chunk->cnlb = chunk_meta->cnlb; |
|
chunk->wp = chunk_meta->wp; |
|
|
|
trace_pblk_chunk_state(pblk_disk_name(pblk), &ppa, |
|
chunk->state); |
|
|
|
if (chunk->type & NVM_CHK_TP_SZ_SPEC) { |
|
WARN_ONCE(1, "pblk: custom-sized chunks unsupported\n"); |
|
continue; |
|
} |
|
|
|
if (!(chunk->state & NVM_CHK_ST_OFFLINE)) |
|
continue; |
|
|
|
set_bit(pos, line->blk_bitmap); |
|
nr_bad_chks++; |
|
} |
|
|
|
return nr_bad_chks; |
|
} |
|
|
|
static long pblk_setup_line_meta(struct pblk *pblk, struct pblk_line *line, |
|
void *chunk_meta, int line_id) |
|
{ |
|
struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
|
struct pblk_line_meta *lm = &pblk->lm; |
|
long nr_bad_chks, chk_in_line; |
|
|
|
line->pblk = pblk; |
|
line->id = line_id; |
|
line->type = PBLK_LINETYPE_FREE; |
|
line->state = PBLK_LINESTATE_NEW; |
|
line->gc_group = PBLK_LINEGC_NONE; |
|
line->vsc = &l_mg->vsc_list[line_id]; |
|
spin_lock_init(&line->lock); |
|
|
|
nr_bad_chks = pblk_setup_line_meta_chk(pblk, line, chunk_meta); |
|
|
|
chk_in_line = lm->blk_per_line - nr_bad_chks; |
|
if (nr_bad_chks < 0 || nr_bad_chks > lm->blk_per_line || |
|
chk_in_line < lm->min_blk_line) { |
|
line->state = PBLK_LINESTATE_BAD; |
|
list_add_tail(&line->list, &l_mg->bad_list); |
|
return 0; |
|
} |
|
|
|
atomic_set(&line->blk_in_line, chk_in_line); |
|
list_add_tail(&line->list, &l_mg->free_list); |
|
l_mg->nr_free_lines++; |
|
|
|
return chk_in_line; |
|
} |
|
|
|
static int pblk_alloc_line_meta(struct pblk *pblk, struct pblk_line *line) |
|
{ |
|
struct pblk_line_meta *lm = &pblk->lm; |
|
|
|
line->blk_bitmap = kzalloc(lm->blk_bitmap_len, GFP_KERNEL); |
|
if (!line->blk_bitmap) |
|
return -ENOMEM; |
|
|
|
line->erase_bitmap = kzalloc(lm->blk_bitmap_len, GFP_KERNEL); |
|
if (!line->erase_bitmap) |
|
goto free_blk_bitmap; |
|
|
|
|
|
line->chks = kmalloc_array(lm->blk_per_line, |
|
sizeof(struct nvm_chk_meta), GFP_KERNEL); |
|
if (!line->chks) |
|
goto free_erase_bitmap; |
|
|
|
line->w_err_gc = kzalloc(sizeof(struct pblk_w_err_gc), GFP_KERNEL); |
|
if (!line->w_err_gc) |
|
goto free_chks; |
|
|
|
return 0; |
|
|
|
free_chks: |
|
kfree(line->chks); |
|
free_erase_bitmap: |
|
kfree(line->erase_bitmap); |
|
free_blk_bitmap: |
|
kfree(line->blk_bitmap); |
|
return -ENOMEM; |
|
} |
|
|
|
static int pblk_line_mg_init(struct pblk *pblk) |
|
{ |
|
struct nvm_tgt_dev *dev = pblk->dev; |
|
struct nvm_geo *geo = &dev->geo; |
|
struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
|
struct pblk_line_meta *lm = &pblk->lm; |
|
int i, bb_distance; |
|
|
|
l_mg->nr_lines = geo->num_chk; |
|
l_mg->log_line = l_mg->data_line = NULL; |
|
l_mg->l_seq_nr = l_mg->d_seq_nr = 0; |
|
l_mg->nr_free_lines = 0; |
|
bitmap_zero(&l_mg->meta_bitmap, PBLK_DATA_LINES); |
|
|
|
INIT_LIST_HEAD(&l_mg->free_list); |
|
INIT_LIST_HEAD(&l_mg->corrupt_list); |
|
INIT_LIST_HEAD(&l_mg->bad_list); |
|
INIT_LIST_HEAD(&l_mg->gc_full_list); |
|
INIT_LIST_HEAD(&l_mg->gc_high_list); |
|
INIT_LIST_HEAD(&l_mg->gc_mid_list); |
|
INIT_LIST_HEAD(&l_mg->gc_low_list); |
|
INIT_LIST_HEAD(&l_mg->gc_empty_list); |
|
INIT_LIST_HEAD(&l_mg->gc_werr_list); |
|
|
|
INIT_LIST_HEAD(&l_mg->emeta_list); |
|
|
|
l_mg->gc_lists[0] = &l_mg->gc_werr_list; |
|
l_mg->gc_lists[1] = &l_mg->gc_high_list; |
|
l_mg->gc_lists[2] = &l_mg->gc_mid_list; |
|
l_mg->gc_lists[3] = &l_mg->gc_low_list; |
|
|
|
spin_lock_init(&l_mg->free_lock); |
|
spin_lock_init(&l_mg->close_lock); |
|
spin_lock_init(&l_mg->gc_lock); |
|
|
|
l_mg->vsc_list = kcalloc(l_mg->nr_lines, sizeof(__le32), GFP_KERNEL); |
|
if (!l_mg->vsc_list) |
|
goto fail; |
|
|
|
l_mg->bb_template = kzalloc(lm->sec_bitmap_len, GFP_KERNEL); |
|
if (!l_mg->bb_template) |
|
goto fail_free_vsc_list; |
|
|
|
l_mg->bb_aux = kzalloc(lm->sec_bitmap_len, GFP_KERNEL); |
|
if (!l_mg->bb_aux) |
|
goto fail_free_bb_template; |
|
|
|
/* smeta is always small enough to fit on a kmalloc memory allocation, |
|
* emeta depends on the number of LUNs allocated to the pblk instance |
|
*/ |
|
for (i = 0; i < PBLK_DATA_LINES; i++) { |
|
l_mg->sline_meta[i] = kmalloc(lm->smeta_len, GFP_KERNEL); |
|
if (!l_mg->sline_meta[i]) |
|
goto fail_free_smeta; |
|
} |
|
|
|
l_mg->bitmap_cache = kmem_cache_create("pblk_lm_bitmap", |
|
lm->sec_bitmap_len, 0, 0, NULL); |
|
if (!l_mg->bitmap_cache) |
|
goto fail_free_smeta; |
|
|
|
/* the bitmap pool is used for both valid and map bitmaps */ |
|
l_mg->bitmap_pool = mempool_create_slab_pool(PBLK_DATA_LINES * 2, |
|
l_mg->bitmap_cache); |
|
if (!l_mg->bitmap_pool) |
|
goto fail_destroy_bitmap_cache; |
|
|
|
/* emeta allocates three different buffers for managing metadata with |
|
* in-memory and in-media layouts |
|
*/ |
|
for (i = 0; i < PBLK_DATA_LINES; i++) { |
|
struct pblk_emeta *emeta; |
|
|
|
emeta = kmalloc(sizeof(struct pblk_emeta), GFP_KERNEL); |
|
if (!emeta) |
|
goto fail_free_emeta; |
|
|
|
emeta->buf = kvmalloc(lm->emeta_len[0], GFP_KERNEL); |
|
if (!emeta->buf) { |
|
kfree(emeta); |
|
goto fail_free_emeta; |
|
} |
|
|
|
emeta->nr_entries = lm->emeta_sec[0]; |
|
l_mg->eline_meta[i] = emeta; |
|
} |
|
|
|
for (i = 0; i < l_mg->nr_lines; i++) |
|
l_mg->vsc_list[i] = cpu_to_le32(EMPTY_ENTRY); |
|
|
|
bb_distance = (geo->all_luns) * geo->ws_opt; |
|
for (i = 0; i < lm->sec_per_line; i += bb_distance) |
|
bitmap_set(l_mg->bb_template, i, geo->ws_opt); |
|
|
|
return 0; |
|
|
|
fail_free_emeta: |
|
while (--i >= 0) { |
|
kvfree(l_mg->eline_meta[i]->buf); |
|
kfree(l_mg->eline_meta[i]); |
|
} |
|
|
|
mempool_destroy(l_mg->bitmap_pool); |
|
fail_destroy_bitmap_cache: |
|
kmem_cache_destroy(l_mg->bitmap_cache); |
|
fail_free_smeta: |
|
for (i = 0; i < PBLK_DATA_LINES; i++) |
|
kfree(l_mg->sline_meta[i]); |
|
kfree(l_mg->bb_aux); |
|
fail_free_bb_template: |
|
kfree(l_mg->bb_template); |
|
fail_free_vsc_list: |
|
kfree(l_mg->vsc_list); |
|
fail: |
|
return -ENOMEM; |
|
} |
|
|
|
static int pblk_line_meta_init(struct pblk *pblk) |
|
{ |
|
struct nvm_tgt_dev *dev = pblk->dev; |
|
struct nvm_geo *geo = &dev->geo; |
|
struct pblk_line_meta *lm = &pblk->lm; |
|
unsigned int smeta_len, emeta_len; |
|
int i; |
|
|
|
lm->sec_per_line = geo->clba * geo->all_luns; |
|
lm->blk_per_line = geo->all_luns; |
|
lm->blk_bitmap_len = BITS_TO_LONGS(geo->all_luns) * sizeof(long); |
|
lm->sec_bitmap_len = BITS_TO_LONGS(lm->sec_per_line) * sizeof(long); |
|
lm->lun_bitmap_len = BITS_TO_LONGS(geo->all_luns) * sizeof(long); |
|
lm->mid_thrs = lm->sec_per_line / 2; |
|
lm->high_thrs = lm->sec_per_line / 4; |
|
lm->meta_distance = (geo->all_luns / 2) * pblk->min_write_pgs; |
|
|
|
/* Calculate necessary pages for smeta. See comment over struct |
|
* line_smeta definition |
|
*/ |
|
i = 1; |
|
add_smeta_page: |
|
lm->smeta_sec = i * geo->ws_opt; |
|
lm->smeta_len = lm->smeta_sec * geo->csecs; |
|
|
|
smeta_len = sizeof(struct line_smeta) + lm->lun_bitmap_len; |
|
if (smeta_len > lm->smeta_len) { |
|
i++; |
|
goto add_smeta_page; |
|
} |
|
|
|
/* Calculate necessary pages for emeta. See comment over struct |
|
* line_emeta definition |
|
*/ |
|
i = 1; |
|
add_emeta_page: |
|
lm->emeta_sec[0] = i * geo->ws_opt; |
|
lm->emeta_len[0] = lm->emeta_sec[0] * geo->csecs; |
|
|
|
emeta_len = calc_emeta_len(pblk); |
|
if (emeta_len > lm->emeta_len[0]) { |
|
i++; |
|
goto add_emeta_page; |
|
} |
|
|
|
lm->emeta_bb = geo->all_luns > i ? geo->all_luns - i : 0; |
|
|
|
lm->min_blk_line = 1; |
|
if (geo->all_luns > 1) |
|
lm->min_blk_line += DIV_ROUND_UP(lm->smeta_sec + |
|
lm->emeta_sec[0], geo->clba); |
|
|
|
if (lm->min_blk_line > lm->blk_per_line) { |
|
pblk_err(pblk, "config. not supported. Min. LUN in line:%d\n", |
|
lm->blk_per_line); |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int pblk_lines_init(struct pblk *pblk) |
|
{ |
|
struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
|
struct pblk_line *line; |
|
void *chunk_meta; |
|
int nr_free_chks = 0; |
|
int i, ret; |
|
|
|
ret = pblk_line_meta_init(pblk); |
|
if (ret) |
|
return ret; |
|
|
|
ret = pblk_line_mg_init(pblk); |
|
if (ret) |
|
return ret; |
|
|
|
ret = pblk_luns_init(pblk); |
|
if (ret) |
|
goto fail_free_meta; |
|
|
|
chunk_meta = pblk_get_chunk_meta(pblk); |
|
if (IS_ERR(chunk_meta)) { |
|
ret = PTR_ERR(chunk_meta); |
|
goto fail_free_luns; |
|
} |
|
|
|
pblk->lines = kcalloc(l_mg->nr_lines, sizeof(struct pblk_line), |
|
GFP_KERNEL); |
|
if (!pblk->lines) { |
|
ret = -ENOMEM; |
|
goto fail_free_chunk_meta; |
|
} |
|
|
|
for (i = 0; i < l_mg->nr_lines; i++) { |
|
line = &pblk->lines[i]; |
|
|
|
ret = pblk_alloc_line_meta(pblk, line); |
|
if (ret) |
|
goto fail_free_lines; |
|
|
|
nr_free_chks += pblk_setup_line_meta(pblk, line, chunk_meta, i); |
|
|
|
trace_pblk_line_state(pblk_disk_name(pblk), line->id, |
|
line->state); |
|
} |
|
|
|
if (!nr_free_chks) { |
|
pblk_err(pblk, "too many bad blocks prevent for sane instance\n"); |
|
ret = -EINTR; |
|
goto fail_free_lines; |
|
} |
|
|
|
ret = pblk_set_provision(pblk, nr_free_chks); |
|
if (ret) |
|
goto fail_free_lines; |
|
|
|
vfree(chunk_meta); |
|
return 0; |
|
|
|
fail_free_lines: |
|
while (--i >= 0) |
|
pblk_line_meta_free(l_mg, &pblk->lines[i]); |
|
kfree(pblk->lines); |
|
fail_free_chunk_meta: |
|
vfree(chunk_meta); |
|
fail_free_luns: |
|
kfree(pblk->luns); |
|
fail_free_meta: |
|
pblk_line_mg_free(pblk); |
|
|
|
return ret; |
|
} |
|
|
|
static int pblk_writer_init(struct pblk *pblk) |
|
{ |
|
pblk->writer_ts = kthread_create(pblk_write_ts, pblk, "pblk-writer-t"); |
|
if (IS_ERR(pblk->writer_ts)) { |
|
int err = PTR_ERR(pblk->writer_ts); |
|
|
|
if (err != -EINTR) |
|
pblk_err(pblk, "could not allocate writer kthread (%d)\n", |
|
err); |
|
return err; |
|
} |
|
|
|
timer_setup(&pblk->wtimer, pblk_write_timer_fn, 0); |
|
mod_timer(&pblk->wtimer, jiffies + msecs_to_jiffies(100)); |
|
|
|
return 0; |
|
} |
|
|
|
static void pblk_writer_stop(struct pblk *pblk) |
|
{ |
|
/* The pipeline must be stopped and the write buffer emptied before the |
|
* write thread is stopped |
|
*/ |
|
WARN(pblk_rb_read_count(&pblk->rwb), |
|
"Stopping not fully persisted write buffer\n"); |
|
|
|
WARN(pblk_rb_sync_count(&pblk->rwb), |
|
"Stopping not fully synced write buffer\n"); |
|
|
|
del_timer_sync(&pblk->wtimer); |
|
if (pblk->writer_ts) |
|
kthread_stop(pblk->writer_ts); |
|
} |
|
|
|
static void pblk_free(struct pblk *pblk) |
|
{ |
|
pblk_lines_free(pblk); |
|
pblk_l2p_free(pblk); |
|
pblk_rwb_free(pblk); |
|
pblk_core_free(pblk); |
|
|
|
kfree(pblk); |
|
} |
|
|
|
static void pblk_tear_down(struct pblk *pblk, bool graceful) |
|
{ |
|
if (graceful) |
|
__pblk_pipeline_flush(pblk); |
|
__pblk_pipeline_stop(pblk); |
|
pblk_writer_stop(pblk); |
|
pblk_rb_sync_l2p(&pblk->rwb); |
|
pblk_rl_free(&pblk->rl); |
|
|
|
pblk_debug(pblk, "consistent tear down (graceful:%d)\n", graceful); |
|
} |
|
|
|
static void pblk_exit(void *private, bool graceful) |
|
{ |
|
struct pblk *pblk = private; |
|
|
|
pblk_gc_exit(pblk, graceful); |
|
pblk_tear_down(pblk, graceful); |
|
|
|
#ifdef CONFIG_NVM_PBLK_DEBUG |
|
pblk_info(pblk, "exit: L2P CRC: %x\n", pblk_l2p_crc(pblk)); |
|
#endif |
|
|
|
pblk_free(pblk); |
|
} |
|
|
|
static sector_t pblk_capacity(void *private) |
|
{ |
|
struct pblk *pblk = private; |
|
|
|
return pblk->capacity * NR_PHY_IN_LOG; |
|
} |
|
|
|
static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk, |
|
int flags) |
|
{ |
|
struct nvm_geo *geo = &dev->geo; |
|
struct request_queue *bqueue = dev->q; |
|
struct request_queue *tqueue = tdisk->queue; |
|
struct pblk *pblk; |
|
int ret; |
|
|
|
pblk = kzalloc(sizeof(struct pblk), GFP_KERNEL); |
|
if (!pblk) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
pblk->dev = dev; |
|
pblk->disk = tdisk; |
|
pblk->state = PBLK_STATE_RUNNING; |
|
trace_pblk_state(pblk_disk_name(pblk), pblk->state); |
|
pblk->gc.gc_enabled = 0; |
|
|
|
if (!(geo->version == NVM_OCSSD_SPEC_12 || |
|
geo->version == NVM_OCSSD_SPEC_20)) { |
|
pblk_err(pblk, "OCSSD version not supported (%u)\n", |
|
geo->version); |
|
kfree(pblk); |
|
return ERR_PTR(-EINVAL); |
|
} |
|
|
|
if (geo->ext) { |
|
pblk_err(pblk, "extended metadata not supported\n"); |
|
kfree(pblk); |
|
return ERR_PTR(-EINVAL); |
|
} |
|
|
|
spin_lock_init(&pblk->resubmit_lock); |
|
spin_lock_init(&pblk->trans_lock); |
|
spin_lock_init(&pblk->lock); |
|
|
|
#ifdef CONFIG_NVM_PBLK_DEBUG |
|
atomic_long_set(&pblk->inflight_writes, 0); |
|
atomic_long_set(&pblk->padded_writes, 0); |
|
atomic_long_set(&pblk->padded_wb, 0); |
|
atomic_long_set(&pblk->req_writes, 0); |
|
atomic_long_set(&pblk->sub_writes, 0); |
|
atomic_long_set(&pblk->sync_writes, 0); |
|
atomic_long_set(&pblk->inflight_reads, 0); |
|
atomic_long_set(&pblk->cache_reads, 0); |
|
atomic_long_set(&pblk->sync_reads, 0); |
|
atomic_long_set(&pblk->recov_writes, 0); |
|
atomic_long_set(&pblk->recov_writes, 0); |
|
atomic_long_set(&pblk->recov_gc_writes, 0); |
|
atomic_long_set(&pblk->recov_gc_reads, 0); |
|
#endif |
|
|
|
atomic_long_set(&pblk->read_failed, 0); |
|
atomic_long_set(&pblk->read_empty, 0); |
|
atomic_long_set(&pblk->read_high_ecc, 0); |
|
atomic_long_set(&pblk->read_failed_gc, 0); |
|
atomic_long_set(&pblk->write_failed, 0); |
|
atomic_long_set(&pblk->erase_failed, 0); |
|
|
|
ret = pblk_core_init(pblk); |
|
if (ret) { |
|
pblk_err(pblk, "could not initialize core\n"); |
|
goto fail; |
|
} |
|
|
|
ret = pblk_lines_init(pblk); |
|
if (ret) { |
|
pblk_err(pblk, "could not initialize lines\n"); |
|
goto fail_free_core; |
|
} |
|
|
|
ret = pblk_rwb_init(pblk); |
|
if (ret) { |
|
pblk_err(pblk, "could not initialize write buffer\n"); |
|
goto fail_free_lines; |
|
} |
|
|
|
ret = pblk_l2p_init(pblk, flags & NVM_TARGET_FACTORY); |
|
if (ret) { |
|
pblk_err(pblk, "could not initialize maps\n"); |
|
goto fail_free_rwb; |
|
} |
|
|
|
ret = pblk_writer_init(pblk); |
|
if (ret) { |
|
if (ret != -EINTR) |
|
pblk_err(pblk, "could not initialize write thread\n"); |
|
goto fail_free_l2p; |
|
} |
|
|
|
ret = pblk_gc_init(pblk); |
|
if (ret) { |
|
pblk_err(pblk, "could not initialize gc\n"); |
|
goto fail_stop_writer; |
|
} |
|
|
|
/* inherit the size from the underlying device */ |
|
blk_queue_logical_block_size(tqueue, queue_physical_block_size(bqueue)); |
|
blk_queue_max_hw_sectors(tqueue, queue_max_hw_sectors(bqueue)); |
|
|
|
blk_queue_write_cache(tqueue, true, false); |
|
|
|
tqueue->limits.discard_granularity = geo->clba * geo->csecs; |
|
tqueue->limits.discard_alignment = 0; |
|
blk_queue_max_discard_sectors(tqueue, UINT_MAX >> 9); |
|
blk_queue_flag_set(QUEUE_FLAG_DISCARD, tqueue); |
|
|
|
pblk_info(pblk, "luns:%u, lines:%d, secs:%llu, buf entries:%u\n", |
|
geo->all_luns, pblk->l_mg.nr_lines, |
|
(unsigned long long)pblk->capacity, |
|
pblk->rwb.nr_entries); |
|
|
|
wake_up_process(pblk->writer_ts); |
|
|
|
/* Check if we need to start GC */ |
|
pblk_gc_should_kick(pblk); |
|
|
|
return pblk; |
|
|
|
fail_stop_writer: |
|
pblk_writer_stop(pblk); |
|
fail_free_l2p: |
|
pblk_l2p_free(pblk); |
|
fail_free_rwb: |
|
pblk_rwb_free(pblk); |
|
fail_free_lines: |
|
pblk_lines_free(pblk); |
|
fail_free_core: |
|
pblk_core_free(pblk); |
|
fail: |
|
kfree(pblk); |
|
return ERR_PTR(ret); |
|
} |
|
|
|
/* physical block device target */ |
|
static struct nvm_tgt_type tt_pblk = { |
|
.name = "pblk", |
|
.version = {1, 0, 0}, |
|
|
|
.bops = &pblk_bops, |
|
.capacity = pblk_capacity, |
|
|
|
.init = pblk_init, |
|
.exit = pblk_exit, |
|
|
|
.sysfs_init = pblk_sysfs_init, |
|
.sysfs_exit = pblk_sysfs_exit, |
|
.owner = THIS_MODULE, |
|
}; |
|
|
|
static int __init pblk_module_init(void) |
|
{ |
|
int ret; |
|
|
|
ret = bioset_init(&pblk_bio_set, BIO_POOL_SIZE, 0, 0); |
|
if (ret) |
|
return ret; |
|
ret = nvm_register_tgt_type(&tt_pblk); |
|
if (ret) |
|
bioset_exit(&pblk_bio_set); |
|
return ret; |
|
} |
|
|
|
static void pblk_module_exit(void) |
|
{ |
|
bioset_exit(&pblk_bio_set); |
|
nvm_unregister_tgt_type(&tt_pblk); |
|
} |
|
|
|
module_init(pblk_module_init); |
|
module_exit(pblk_module_exit); |
|
MODULE_AUTHOR("Javier Gonzalez <[email protected]>"); |
|
MODULE_AUTHOR("Matias Bjorling <[email protected]>"); |
|
MODULE_LICENSE("GPL v2"); |
|
MODULE_DESCRIPTION("Physical Block-Device for Open-Channel SSDs");
|
|
|