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874 lines
21 KiB
874 lines
21 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (C) 2016 CNEX Labs |
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* Initial: Javier Gonzalez <[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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* pblk-recovery.c - pblk's recovery path |
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* |
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* The L2P recovery path is single threaded as the L2P table is updated in order |
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* following the line sequence ID. |
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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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int pblk_recov_check_emeta(struct pblk *pblk, struct line_emeta *emeta_buf) |
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{ |
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u32 crc; |
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crc = pblk_calc_emeta_crc(pblk, emeta_buf); |
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if (le32_to_cpu(emeta_buf->crc) != crc) |
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return 1; |
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if (le32_to_cpu(emeta_buf->header.identifier) != PBLK_MAGIC) |
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return 1; |
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return 0; |
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} |
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static int pblk_recov_l2p_from_emeta(struct pblk *pblk, struct pblk_line *line) |
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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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struct pblk_line_meta *lm = &pblk->lm; |
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struct pblk_emeta *emeta = line->emeta; |
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struct line_emeta *emeta_buf = emeta->buf; |
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__le64 *lba_list; |
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u64 data_start, data_end; |
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u64 nr_valid_lbas, nr_lbas = 0; |
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u64 i; |
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lba_list = emeta_to_lbas(pblk, emeta_buf); |
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if (!lba_list) |
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return 1; |
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data_start = pblk_line_smeta_start(pblk, line) + lm->smeta_sec; |
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data_end = line->emeta_ssec; |
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nr_valid_lbas = le64_to_cpu(emeta_buf->nr_valid_lbas); |
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for (i = data_start; i < data_end; i++) { |
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struct ppa_addr ppa; |
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int pos; |
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ppa = addr_to_gen_ppa(pblk, i, line->id); |
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pos = pblk_ppa_to_pos(geo, ppa); |
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/* Do not update bad blocks */ |
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if (test_bit(pos, line->blk_bitmap)) |
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continue; |
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if (le64_to_cpu(lba_list[i]) == ADDR_EMPTY) { |
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spin_lock(&line->lock); |
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if (test_and_set_bit(i, line->invalid_bitmap)) |
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WARN_ONCE(1, "pblk: rec. double invalidate:\n"); |
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else |
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le32_add_cpu(line->vsc, -1); |
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spin_unlock(&line->lock); |
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continue; |
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} |
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pblk_update_map(pblk, le64_to_cpu(lba_list[i]), ppa); |
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nr_lbas++; |
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} |
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if (nr_valid_lbas != nr_lbas) |
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pblk_err(pblk, "line %d - inconsistent lba list(%llu/%llu)\n", |
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line->id, nr_valid_lbas, nr_lbas); |
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line->left_msecs = 0; |
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return 0; |
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} |
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static void pblk_update_line_wp(struct pblk *pblk, struct pblk_line *line, |
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u64 written_secs) |
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{ |
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struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
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int i; |
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for (i = 0; i < written_secs; i += pblk->min_write_pgs) |
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__pblk_alloc_page(pblk, line, pblk->min_write_pgs); |
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spin_lock(&l_mg->free_lock); |
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if (written_secs > line->left_msecs) { |
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/* |
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* We have all data sectors written |
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* and some emeta sectors written too. |
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*/ |
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line->left_msecs = 0; |
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} else { |
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/* We have only some data sectors written. */ |
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line->left_msecs -= written_secs; |
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} |
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spin_unlock(&l_mg->free_lock); |
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} |
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static u64 pblk_sec_in_open_line(struct pblk *pblk, struct pblk_line *line) |
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{ |
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struct pblk_line_meta *lm = &pblk->lm; |
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int nr_bb = bitmap_weight(line->blk_bitmap, lm->blk_per_line); |
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u64 written_secs = 0; |
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int valid_chunks = 0; |
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int i; |
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for (i = 0; i < lm->blk_per_line; i++) { |
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struct nvm_chk_meta *chunk = &line->chks[i]; |
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if (chunk->state & NVM_CHK_ST_OFFLINE) |
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continue; |
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written_secs += chunk->wp; |
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valid_chunks++; |
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} |
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if (lm->blk_per_line - nr_bb != valid_chunks) |
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pblk_err(pblk, "recovery line %d is bad\n", line->id); |
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pblk_update_line_wp(pblk, line, written_secs - lm->smeta_sec); |
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return written_secs; |
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} |
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struct pblk_recov_alloc { |
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struct ppa_addr *ppa_list; |
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void *meta_list; |
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struct nvm_rq *rqd; |
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void *data; |
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dma_addr_t dma_ppa_list; |
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dma_addr_t dma_meta_list; |
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}; |
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static void pblk_recov_complete(struct kref *ref) |
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{ |
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struct pblk_pad_rq *pad_rq = container_of(ref, struct pblk_pad_rq, ref); |
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complete(&pad_rq->wait); |
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} |
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static void pblk_end_io_recov(struct nvm_rq *rqd) |
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{ |
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struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd); |
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struct pblk_pad_rq *pad_rq = rqd->private; |
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struct pblk *pblk = pad_rq->pblk; |
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pblk_up_chunk(pblk, ppa_list[0]); |
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pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT); |
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atomic_dec(&pblk->inflight_io); |
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kref_put(&pad_rq->ref, pblk_recov_complete); |
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} |
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/* pad line using line bitmap. */ |
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static int pblk_recov_pad_line(struct pblk *pblk, struct pblk_line *line, |
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int left_ppas) |
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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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void *meta_list; |
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struct pblk_pad_rq *pad_rq; |
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struct nvm_rq *rqd; |
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struct ppa_addr *ppa_list; |
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void *data; |
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__le64 *lba_list = emeta_to_lbas(pblk, line->emeta->buf); |
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u64 w_ptr = line->cur_sec; |
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int left_line_ppas, rq_ppas; |
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int i, j; |
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int ret = 0; |
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spin_lock(&line->lock); |
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left_line_ppas = line->left_msecs; |
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spin_unlock(&line->lock); |
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pad_rq = kmalloc(sizeof(struct pblk_pad_rq), GFP_KERNEL); |
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if (!pad_rq) |
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return -ENOMEM; |
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data = vzalloc(array_size(pblk->max_write_pgs, geo->csecs)); |
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if (!data) { |
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ret = -ENOMEM; |
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goto free_rq; |
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} |
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pad_rq->pblk = pblk; |
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init_completion(&pad_rq->wait); |
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kref_init(&pad_rq->ref); |
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next_pad_rq: |
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rq_ppas = pblk_calc_secs(pblk, left_ppas, 0, false); |
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if (rq_ppas < pblk->min_write_pgs) { |
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pblk_err(pblk, "corrupted pad line %d\n", line->id); |
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goto fail_complete; |
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} |
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rqd = pblk_alloc_rqd(pblk, PBLK_WRITE_INT); |
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ret = pblk_alloc_rqd_meta(pblk, rqd); |
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if (ret) { |
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pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT); |
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goto fail_complete; |
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} |
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rqd->bio = NULL; |
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rqd->opcode = NVM_OP_PWRITE; |
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rqd->is_seq = 1; |
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rqd->nr_ppas = rq_ppas; |
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rqd->end_io = pblk_end_io_recov; |
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rqd->private = pad_rq; |
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ppa_list = nvm_rq_to_ppa_list(rqd); |
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meta_list = rqd->meta_list; |
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for (i = 0; i < rqd->nr_ppas; ) { |
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struct ppa_addr ppa; |
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int pos; |
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w_ptr = pblk_alloc_page(pblk, line, pblk->min_write_pgs); |
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ppa = addr_to_gen_ppa(pblk, w_ptr, line->id); |
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pos = pblk_ppa_to_pos(geo, ppa); |
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while (test_bit(pos, line->blk_bitmap)) { |
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w_ptr += pblk->min_write_pgs; |
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ppa = addr_to_gen_ppa(pblk, w_ptr, line->id); |
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pos = pblk_ppa_to_pos(geo, ppa); |
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} |
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for (j = 0; j < pblk->min_write_pgs; j++, i++, w_ptr++) { |
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struct ppa_addr dev_ppa; |
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struct pblk_sec_meta *meta; |
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__le64 addr_empty = cpu_to_le64(ADDR_EMPTY); |
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dev_ppa = addr_to_gen_ppa(pblk, w_ptr, line->id); |
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pblk_map_invalidate(pblk, dev_ppa); |
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lba_list[w_ptr] = addr_empty; |
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meta = pblk_get_meta(pblk, meta_list, i); |
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meta->lba = addr_empty; |
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ppa_list[i] = dev_ppa; |
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} |
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} |
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kref_get(&pad_rq->ref); |
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pblk_down_chunk(pblk, ppa_list[0]); |
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ret = pblk_submit_io(pblk, rqd, data); |
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if (ret) { |
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pblk_err(pblk, "I/O submission failed: %d\n", ret); |
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pblk_up_chunk(pblk, ppa_list[0]); |
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kref_put(&pad_rq->ref, pblk_recov_complete); |
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pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT); |
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goto fail_complete; |
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} |
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left_line_ppas -= rq_ppas; |
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left_ppas -= rq_ppas; |
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if (left_ppas && left_line_ppas) |
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goto next_pad_rq; |
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fail_complete: |
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kref_put(&pad_rq->ref, pblk_recov_complete); |
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wait_for_completion(&pad_rq->wait); |
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if (!pblk_line_is_full(line)) |
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pblk_err(pblk, "corrupted padded line: %d\n", line->id); |
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vfree(data); |
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free_rq: |
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kfree(pad_rq); |
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return ret; |
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} |
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static int pblk_pad_distance(struct pblk *pblk, struct pblk_line *line) |
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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 distance = geo->mw_cunits * geo->all_luns * geo->ws_opt; |
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return (distance > line->left_msecs) ? line->left_msecs : distance; |
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} |
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/* Return a chunk belonging to a line by stripe(write order) index */ |
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static struct nvm_chk_meta *pblk_get_stripe_chunk(struct pblk *pblk, |
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struct pblk_line *line, |
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int index) |
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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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struct pblk_lun *rlun; |
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struct ppa_addr ppa; |
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int pos; |
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rlun = &pblk->luns[index]; |
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ppa = rlun->bppa; |
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pos = pblk_ppa_to_pos(geo, ppa); |
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return &line->chks[pos]; |
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} |
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static int pblk_line_wps_are_unbalanced(struct pblk *pblk, |
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struct pblk_line *line) |
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{ |
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struct pblk_line_meta *lm = &pblk->lm; |
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int blk_in_line = lm->blk_per_line; |
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struct nvm_chk_meta *chunk; |
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u64 max_wp, min_wp; |
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int i; |
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i = find_first_zero_bit(line->blk_bitmap, blk_in_line); |
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/* If there is one or zero good chunks in the line, |
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* the write pointers can't be unbalanced. |
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*/ |
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if (i >= (blk_in_line - 1)) |
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return 0; |
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chunk = pblk_get_stripe_chunk(pblk, line, i); |
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max_wp = chunk->wp; |
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if (max_wp > pblk->max_write_pgs) |
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min_wp = max_wp - pblk->max_write_pgs; |
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else |
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min_wp = 0; |
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i = find_next_zero_bit(line->blk_bitmap, blk_in_line, i + 1); |
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while (i < blk_in_line) { |
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chunk = pblk_get_stripe_chunk(pblk, line, i); |
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if (chunk->wp > max_wp || chunk->wp < min_wp) |
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return 1; |
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i = find_next_zero_bit(line->blk_bitmap, blk_in_line, i + 1); |
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} |
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return 0; |
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} |
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static int pblk_recov_scan_oob(struct pblk *pblk, struct pblk_line *line, |
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struct pblk_recov_alloc p) |
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{ |
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struct nvm_tgt_dev *dev = pblk->dev; |
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struct pblk_line_meta *lm = &pblk->lm; |
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struct nvm_geo *geo = &dev->geo; |
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struct ppa_addr *ppa_list; |
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void *meta_list; |
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struct nvm_rq *rqd; |
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void *data; |
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dma_addr_t dma_ppa_list, dma_meta_list; |
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__le64 *lba_list; |
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u64 paddr = pblk_line_smeta_start(pblk, line) + lm->smeta_sec; |
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bool padded = false; |
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int rq_ppas; |
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int i, j; |
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int ret; |
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u64 left_ppas = pblk_sec_in_open_line(pblk, line) - lm->smeta_sec; |
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if (pblk_line_wps_are_unbalanced(pblk, line)) |
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pblk_warn(pblk, "recovering unbalanced line (%d)\n", line->id); |
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ppa_list = p.ppa_list; |
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meta_list = p.meta_list; |
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rqd = p.rqd; |
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data = p.data; |
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dma_ppa_list = p.dma_ppa_list; |
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dma_meta_list = p.dma_meta_list; |
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lba_list = emeta_to_lbas(pblk, line->emeta->buf); |
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next_rq: |
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memset(rqd, 0, pblk_g_rq_size); |
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rq_ppas = pblk_calc_secs(pblk, left_ppas, 0, false); |
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if (!rq_ppas) |
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rq_ppas = pblk->min_write_pgs; |
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retry_rq: |
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rqd->bio = NULL; |
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rqd->opcode = NVM_OP_PREAD; |
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rqd->meta_list = meta_list; |
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rqd->nr_ppas = rq_ppas; |
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rqd->ppa_list = ppa_list; |
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rqd->dma_ppa_list = dma_ppa_list; |
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rqd->dma_meta_list = dma_meta_list; |
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ppa_list = nvm_rq_to_ppa_list(rqd); |
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if (pblk_io_aligned(pblk, rq_ppas)) |
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rqd->is_seq = 1; |
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for (i = 0; i < rqd->nr_ppas; ) { |
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struct ppa_addr ppa; |
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int pos; |
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ppa = addr_to_gen_ppa(pblk, paddr, line->id); |
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pos = pblk_ppa_to_pos(geo, ppa); |
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while (test_bit(pos, line->blk_bitmap)) { |
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paddr += pblk->min_write_pgs; |
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ppa = addr_to_gen_ppa(pblk, paddr, line->id); |
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pos = pblk_ppa_to_pos(geo, ppa); |
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} |
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for (j = 0; j < pblk->min_write_pgs; j++, i++) |
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ppa_list[i] = |
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addr_to_gen_ppa(pblk, paddr + j, line->id); |
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} |
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ret = pblk_submit_io_sync(pblk, rqd, data); |
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if (ret) { |
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pblk_err(pblk, "I/O submission failed: %d\n", ret); |
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return ret; |
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} |
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atomic_dec(&pblk->inflight_io); |
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/* If a read fails, do a best effort by padding the line and retrying */ |
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if (rqd->error && rqd->error != NVM_RSP_WARN_HIGHECC) { |
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int pad_distance, ret; |
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if (padded) { |
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pblk_log_read_err(pblk, rqd); |
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return -EINTR; |
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} |
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pad_distance = pblk_pad_distance(pblk, line); |
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ret = pblk_recov_pad_line(pblk, line, pad_distance); |
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if (ret) { |
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return ret; |
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} |
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padded = true; |
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goto retry_rq; |
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} |
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pblk_get_packed_meta(pblk, rqd); |
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for (i = 0; i < rqd->nr_ppas; i++) { |
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struct pblk_sec_meta *meta = pblk_get_meta(pblk, meta_list, i); |
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u64 lba = le64_to_cpu(meta->lba); |
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lba_list[paddr++] = cpu_to_le64(lba); |
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if (lba == ADDR_EMPTY || lba >= pblk->capacity) |
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continue; |
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line->nr_valid_lbas++; |
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pblk_update_map(pblk, lba, ppa_list[i]); |
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} |
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left_ppas -= rq_ppas; |
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if (left_ppas > 0) |
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goto next_rq; |
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#ifdef CONFIG_NVM_PBLK_DEBUG |
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WARN_ON(padded && !pblk_line_is_full(line)); |
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#endif |
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return 0; |
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} |
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/* Scan line for lbas on out of bound area */ |
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static int pblk_recov_l2p_from_oob(struct pblk *pblk, struct pblk_line *line) |
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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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struct nvm_rq *rqd; |
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struct ppa_addr *ppa_list; |
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void *meta_list; |
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struct pblk_recov_alloc p; |
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void *data; |
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dma_addr_t dma_ppa_list, dma_meta_list; |
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int ret = 0; |
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meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, &dma_meta_list); |
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if (!meta_list) |
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return -ENOMEM; |
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ppa_list = (void *)(meta_list) + pblk_dma_meta_size(pblk); |
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dma_ppa_list = dma_meta_list + pblk_dma_meta_size(pblk); |
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data = kcalloc(pblk->max_write_pgs, geo->csecs, GFP_KERNEL); |
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if (!data) { |
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ret = -ENOMEM; |
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goto free_meta_list; |
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} |
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rqd = mempool_alloc(&pblk->r_rq_pool, GFP_KERNEL); |
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memset(rqd, 0, pblk_g_rq_size); |
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p.ppa_list = ppa_list; |
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p.meta_list = meta_list; |
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p.rqd = rqd; |
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p.data = data; |
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p.dma_ppa_list = dma_ppa_list; |
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p.dma_meta_list = dma_meta_list; |
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ret = pblk_recov_scan_oob(pblk, line, p); |
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if (ret) { |
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pblk_err(pblk, "could not recover L2P form OOB\n"); |
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goto out; |
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} |
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if (pblk_line_is_full(line)) |
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pblk_line_recov_close(pblk, line); |
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out: |
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mempool_free(rqd, &pblk->r_rq_pool); |
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kfree(data); |
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free_meta_list: |
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nvm_dev_dma_free(dev->parent, meta_list, dma_meta_list); |
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return ret; |
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} |
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|
|
/* Insert lines ordered by sequence number (seq_num) on list */ |
|
static void pblk_recov_line_add_ordered(struct list_head *head, |
|
struct pblk_line *line) |
|
{ |
|
struct pblk_line *t = NULL; |
|
|
|
list_for_each_entry(t, head, list) |
|
if (t->seq_nr > line->seq_nr) |
|
break; |
|
|
|
__list_add(&line->list, t->list.prev, &t->list); |
|
} |
|
|
|
static u64 pblk_line_emeta_start(struct pblk *pblk, struct pblk_line *line) |
|
{ |
|
struct nvm_tgt_dev *dev = pblk->dev; |
|
struct nvm_geo *geo = &dev->geo; |
|
struct pblk_line_meta *lm = &pblk->lm; |
|
unsigned int emeta_secs; |
|
u64 emeta_start; |
|
struct ppa_addr ppa; |
|
int pos; |
|
|
|
emeta_secs = lm->emeta_sec[0]; |
|
emeta_start = lm->sec_per_line; |
|
|
|
while (emeta_secs) { |
|
emeta_start--; |
|
ppa = addr_to_gen_ppa(pblk, emeta_start, line->id); |
|
pos = pblk_ppa_to_pos(geo, ppa); |
|
if (!test_bit(pos, line->blk_bitmap)) |
|
emeta_secs--; |
|
} |
|
|
|
return emeta_start; |
|
} |
|
|
|
static int pblk_recov_check_line_version(struct pblk *pblk, |
|
struct line_emeta *emeta) |
|
{ |
|
struct line_header *header = &emeta->header; |
|
|
|
if (header->version_major != EMETA_VERSION_MAJOR) { |
|
pblk_err(pblk, "line major version mismatch: %d, expected: %d\n", |
|
header->version_major, EMETA_VERSION_MAJOR); |
|
return 1; |
|
} |
|
|
|
#ifdef CONFIG_NVM_PBLK_DEBUG |
|
if (header->version_minor > EMETA_VERSION_MINOR) |
|
pblk_info(pblk, "newer line minor version found: %d\n", |
|
header->version_minor); |
|
#endif |
|
|
|
return 0; |
|
} |
|
|
|
static void pblk_recov_wa_counters(struct pblk *pblk, |
|
struct line_emeta *emeta) |
|
{ |
|
struct pblk_line_meta *lm = &pblk->lm; |
|
struct line_header *header = &emeta->header; |
|
struct wa_counters *wa = emeta_to_wa(lm, emeta); |
|
|
|
/* WA counters were introduced in emeta version 0.2 */ |
|
if (header->version_major > 0 || header->version_minor >= 2) { |
|
u64 user = le64_to_cpu(wa->user); |
|
u64 pad = le64_to_cpu(wa->pad); |
|
u64 gc = le64_to_cpu(wa->gc); |
|
|
|
atomic64_set(&pblk->user_wa, user); |
|
atomic64_set(&pblk->pad_wa, pad); |
|
atomic64_set(&pblk->gc_wa, gc); |
|
|
|
pblk->user_rst_wa = user; |
|
pblk->pad_rst_wa = pad; |
|
pblk->gc_rst_wa = gc; |
|
} |
|
} |
|
|
|
static int pblk_line_was_written(struct pblk_line *line, |
|
struct pblk *pblk) |
|
{ |
|
|
|
struct pblk_line_meta *lm = &pblk->lm; |
|
struct nvm_tgt_dev *dev = pblk->dev; |
|
struct nvm_geo *geo = &dev->geo; |
|
struct nvm_chk_meta *chunk; |
|
struct ppa_addr bppa; |
|
int smeta_blk; |
|
|
|
if (line->state == PBLK_LINESTATE_BAD) |
|
return 0; |
|
|
|
smeta_blk = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line); |
|
if (smeta_blk >= lm->blk_per_line) |
|
return 0; |
|
|
|
bppa = pblk->luns[smeta_blk].bppa; |
|
chunk = &line->chks[pblk_ppa_to_pos(geo, bppa)]; |
|
|
|
if (chunk->state & NVM_CHK_ST_CLOSED || |
|
(chunk->state & NVM_CHK_ST_OPEN |
|
&& chunk->wp >= lm->smeta_sec)) |
|
return 1; |
|
|
|
return 0; |
|
} |
|
|
|
static bool pblk_line_is_open(struct pblk *pblk, struct pblk_line *line) |
|
{ |
|
struct pblk_line_meta *lm = &pblk->lm; |
|
int i; |
|
|
|
for (i = 0; i < lm->blk_per_line; i++) |
|
if (line->chks[i].state & NVM_CHK_ST_OPEN) |
|
return true; |
|
|
|
return false; |
|
} |
|
|
|
struct pblk_line *pblk_recov_l2p(struct pblk *pblk) |
|
{ |
|
struct pblk_line_meta *lm = &pblk->lm; |
|
struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
|
struct pblk_line *line, *tline, *data_line = NULL; |
|
struct pblk_smeta *smeta; |
|
struct pblk_emeta *emeta; |
|
struct line_smeta *smeta_buf; |
|
int found_lines = 0, recovered_lines = 0, open_lines = 0; |
|
int is_next = 0; |
|
int meta_line; |
|
int i, valid_uuid = 0; |
|
LIST_HEAD(recov_list); |
|
|
|
/* TODO: Implement FTL snapshot */ |
|
|
|
/* Scan recovery - takes place when FTL snapshot fails */ |
|
spin_lock(&l_mg->free_lock); |
|
meta_line = find_first_zero_bit(&l_mg->meta_bitmap, PBLK_DATA_LINES); |
|
set_bit(meta_line, &l_mg->meta_bitmap); |
|
smeta = l_mg->sline_meta[meta_line]; |
|
emeta = l_mg->eline_meta[meta_line]; |
|
smeta_buf = (struct line_smeta *)smeta; |
|
spin_unlock(&l_mg->free_lock); |
|
|
|
/* Order data lines using their sequence number */ |
|
for (i = 0; i < l_mg->nr_lines; i++) { |
|
u32 crc; |
|
|
|
line = &pblk->lines[i]; |
|
|
|
memset(smeta, 0, lm->smeta_len); |
|
line->smeta = smeta; |
|
line->lun_bitmap = ((void *)(smeta_buf)) + |
|
sizeof(struct line_smeta); |
|
|
|
if (!pblk_line_was_written(line, pblk)) |
|
continue; |
|
|
|
/* Lines that cannot be read are assumed as not written here */ |
|
if (pblk_line_smeta_read(pblk, line)) |
|
continue; |
|
|
|
crc = pblk_calc_smeta_crc(pblk, smeta_buf); |
|
if (le32_to_cpu(smeta_buf->crc) != crc) |
|
continue; |
|
|
|
if (le32_to_cpu(smeta_buf->header.identifier) != PBLK_MAGIC) |
|
continue; |
|
|
|
if (smeta_buf->header.version_major != SMETA_VERSION_MAJOR) { |
|
pblk_err(pblk, "found incompatible line version %u\n", |
|
smeta_buf->header.version_major); |
|
return ERR_PTR(-EINVAL); |
|
} |
|
|
|
/* The first valid instance uuid is used for initialization */ |
|
if (!valid_uuid) { |
|
import_guid(&pblk->instance_uuid, smeta_buf->header.uuid); |
|
valid_uuid = 1; |
|
} |
|
|
|
if (!guid_equal(&pblk->instance_uuid, |
|
(guid_t *)&smeta_buf->header.uuid)) { |
|
pblk_debug(pblk, "ignore line %u due to uuid mismatch\n", |
|
i); |
|
continue; |
|
} |
|
|
|
/* Update line metadata */ |
|
spin_lock(&line->lock); |
|
line->id = le32_to_cpu(smeta_buf->header.id); |
|
line->type = le16_to_cpu(smeta_buf->header.type); |
|
line->seq_nr = le64_to_cpu(smeta_buf->seq_nr); |
|
spin_unlock(&line->lock); |
|
|
|
/* Update general metadata */ |
|
spin_lock(&l_mg->free_lock); |
|
if (line->seq_nr >= l_mg->d_seq_nr) |
|
l_mg->d_seq_nr = line->seq_nr + 1; |
|
l_mg->nr_free_lines--; |
|
spin_unlock(&l_mg->free_lock); |
|
|
|
if (pblk_line_recov_alloc(pblk, line)) |
|
goto out; |
|
|
|
pblk_recov_line_add_ordered(&recov_list, line); |
|
found_lines++; |
|
pblk_debug(pblk, "recovering data line %d, seq:%llu\n", |
|
line->id, smeta_buf->seq_nr); |
|
} |
|
|
|
if (!found_lines) { |
|
guid_gen(&pblk->instance_uuid); |
|
|
|
spin_lock(&l_mg->free_lock); |
|
WARN_ON_ONCE(!test_and_clear_bit(meta_line, |
|
&l_mg->meta_bitmap)); |
|
spin_unlock(&l_mg->free_lock); |
|
|
|
goto out; |
|
} |
|
|
|
/* Verify closed blocks and recover this portion of L2P table*/ |
|
list_for_each_entry_safe(line, tline, &recov_list, list) { |
|
recovered_lines++; |
|
|
|
line->emeta_ssec = pblk_line_emeta_start(pblk, line); |
|
line->emeta = emeta; |
|
memset(line->emeta->buf, 0, lm->emeta_len[0]); |
|
|
|
if (pblk_line_is_open(pblk, line)) { |
|
pblk_recov_l2p_from_oob(pblk, line); |
|
goto next; |
|
} |
|
|
|
if (pblk_line_emeta_read(pblk, line, line->emeta->buf)) { |
|
pblk_recov_l2p_from_oob(pblk, line); |
|
goto next; |
|
} |
|
|
|
if (pblk_recov_check_emeta(pblk, line->emeta->buf)) { |
|
pblk_recov_l2p_from_oob(pblk, line); |
|
goto next; |
|
} |
|
|
|
if (pblk_recov_check_line_version(pblk, line->emeta->buf)) |
|
return ERR_PTR(-EINVAL); |
|
|
|
pblk_recov_wa_counters(pblk, line->emeta->buf); |
|
|
|
if (pblk_recov_l2p_from_emeta(pblk, line)) |
|
pblk_recov_l2p_from_oob(pblk, line); |
|
|
|
next: |
|
if (pblk_line_is_full(line)) { |
|
struct list_head *move_list; |
|
|
|
spin_lock(&line->lock); |
|
line->state = PBLK_LINESTATE_CLOSED; |
|
trace_pblk_line_state(pblk_disk_name(pblk), line->id, |
|
line->state); |
|
move_list = pblk_line_gc_list(pblk, line); |
|
spin_unlock(&line->lock); |
|
|
|
spin_lock(&l_mg->gc_lock); |
|
list_move_tail(&line->list, move_list); |
|
spin_unlock(&l_mg->gc_lock); |
|
|
|
mempool_free(line->map_bitmap, l_mg->bitmap_pool); |
|
line->map_bitmap = NULL; |
|
line->smeta = NULL; |
|
line->emeta = NULL; |
|
} else { |
|
spin_lock(&line->lock); |
|
line->state = PBLK_LINESTATE_OPEN; |
|
spin_unlock(&line->lock); |
|
|
|
line->emeta->mem = 0; |
|
atomic_set(&line->emeta->sync, 0); |
|
|
|
trace_pblk_line_state(pblk_disk_name(pblk), line->id, |
|
line->state); |
|
|
|
data_line = line; |
|
line->meta_line = meta_line; |
|
|
|
open_lines++; |
|
} |
|
} |
|
|
|
if (!open_lines) { |
|
spin_lock(&l_mg->free_lock); |
|
WARN_ON_ONCE(!test_and_clear_bit(meta_line, |
|
&l_mg->meta_bitmap)); |
|
spin_unlock(&l_mg->free_lock); |
|
} else { |
|
spin_lock(&l_mg->free_lock); |
|
l_mg->data_line = data_line; |
|
/* Allocate next line for preparation */ |
|
l_mg->data_next = pblk_line_get(pblk); |
|
if (l_mg->data_next) { |
|
l_mg->data_next->seq_nr = l_mg->d_seq_nr++; |
|
l_mg->data_next->type = PBLK_LINETYPE_DATA; |
|
is_next = 1; |
|
} |
|
spin_unlock(&l_mg->free_lock); |
|
} |
|
|
|
if (is_next) |
|
pblk_line_erase(pblk, l_mg->data_next); |
|
|
|
out: |
|
if (found_lines != recovered_lines) |
|
pblk_err(pblk, "failed to recover all found lines %d/%d\n", |
|
found_lines, recovered_lines); |
|
|
|
return data_line; |
|
} |
|
|
|
/* |
|
* Pad current line |
|
*/ |
|
int pblk_recov_pad(struct pblk *pblk) |
|
{ |
|
struct pblk_line *line; |
|
struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
|
int left_msecs; |
|
int ret = 0; |
|
|
|
spin_lock(&l_mg->free_lock); |
|
line = l_mg->data_line; |
|
left_msecs = line->left_msecs; |
|
spin_unlock(&l_mg->free_lock); |
|
|
|
ret = pblk_recov_pad_line(pblk, line, left_msecs); |
|
if (ret) { |
|
pblk_err(pblk, "tear down padding failed (%d)\n", ret); |
|
return ret; |
|
} |
|
|
|
pblk_line_close_meta(pblk, line); |
|
return ret; |
|
}
|
|
|