From 43d47127219de1dd674b917c1835baa14c4c1768 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Javier=20Gonz=C3=A1lez?= Date: Fri, 30 Mar 2018 00:05:09 +0200 Subject: [PATCH] lightnvm: pblk: refactor init/exit sequences MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Refactor init and exit sequences to eliminate dependencies among init modules and improve readability. Signed-off-by: Javier González Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe --- drivers/lightnvm/pblk-init.c | 413 +++++++++++++++++------------------ 1 file changed, 206 insertions(+), 207 deletions(-) diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c index ee936c1ff764..8f1d622801df 100644 --- a/drivers/lightnvm/pblk-init.c +++ b/drivers/lightnvm/pblk-init.c @@ -103,7 +103,40 @@ static void pblk_l2p_free(struct pblk *pblk) vfree(pblk->trans_map); } -static int pblk_l2p_init(struct pblk *pblk) +static int pblk_l2p_recover(struct pblk *pblk, bool factory_init) +{ + struct pblk_line *line = NULL; + + if (factory_init) { + pblk_setup_uuid(pblk); + } else { + line = pblk_recov_l2p(pblk); + if (IS_ERR(line)) { + pr_err("pblk: could not recover l2p table\n"); + return -EFAULT; + } + } + +#ifdef CONFIG_NVM_DEBUG + pr_info("pblk init: L2P CRC: %x\n", pblk_l2p_crc(pblk)); +#endif + + /* Free full lines directly as GC has not been started yet */ + pblk_gc_free_full_lines(pblk); + + if (!line) { + /* Configure next line for user data */ + line = pblk_line_get_first_data(pblk); + if (!line) { + pr_err("pblk: line list corrupted\n"); + return -EFAULT; + } + } + + return 0; +} + +static int pblk_l2p_init(struct pblk *pblk, bool factory_init) { sector_t i; struct ppa_addr ppa; @@ -119,7 +152,7 @@ static int pblk_l2p_init(struct pblk *pblk) for (i = 0; i < pblk->rl.nr_secs; i++) pblk_trans_map_set(pblk, i, ppa); - return 0; + return pblk_l2p_recover(pblk, factory_init); } static void pblk_rwb_free(struct pblk *pblk) @@ -159,7 +192,13 @@ static int pblk_set_ppaf(struct pblk *pblk) struct nvm_tgt_dev *dev = pblk->dev; struct nvm_geo *geo = &dev->geo; struct nvm_addr_format ppaf = geo->ppaf; - int power_len; + int mod, power_len; + + div_u64_rem(geo->sec_per_chk, pblk->min_write_pgs, &mod); + if (mod) { + pr_err("pblk: bad configuration of sectors/pages\n"); + return -EINVAL; + } /* Re-calculate channel and lun format to adapt to configuration */ power_len = get_count_order(geo->nr_chnls); @@ -252,13 +291,40 @@ static int pblk_core_init(struct pblk *pblk) { struct nvm_tgt_dev *dev = pblk->dev; struct nvm_geo *geo = &dev->geo; + int 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; + + atomic64_set(&pblk->nr_flush, 0); + pblk->nr_flush_rst = 0; pblk->pgs_in_buffer = NVM_MEM_PAGE_WRITE * geo->sec_per_pg * geo->nr_planes * geo->all_luns; - if (pblk_init_global_caches(pblk)) + pblk->min_write_pgs = geo->sec_per_pl * (geo->sec_size / PAGE_SIZE); + max_write_ppas = pblk->min_write_pgs * geo->all_luns; + pblk->max_write_pgs = min_t(int, max_write_ppas, NVM_MAX_VLBA); + pblk_set_sec_per_write(pblk, pblk->min_write_pgs); + + if (pblk->max_write_pgs > PBLK_MAX_REQ_ADDRS) { + pr_err("pblk: vector list too big(%u > %u)\n", + pblk->max_write_pgs, PBLK_MAX_REQ_ADDRS); + return -EINVAL; + } + + pblk->pad_dist = kzalloc((pblk->min_write_pgs - 1) * sizeof(atomic64_t), + GFP_KERNEL); + if (!pblk->pad_dist) return -ENOMEM; + if (pblk_init_global_caches(pblk)) + goto fail_free_pad_dist; + /* Internal bios can be at most the sectors signaled by the device. */ pblk->page_bio_pool = mempool_create_page_pool(NVM_MAX_VLBA, 0); if (!pblk->page_bio_pool) @@ -307,10 +373,8 @@ static int pblk_core_init(struct pblk *pblk) if (pblk_set_ppaf(pblk)) goto free_r_end_wq; - if (pblk_rwb_init(pblk)) - goto free_r_end_wq; - INIT_LIST_HEAD(&pblk->compl_list); + return 0; free_r_end_wq: @@ -333,6 +397,8 @@ static int pblk_core_init(struct pblk *pblk) mempool_destroy(pblk->page_bio_pool); free_global_caches: pblk_free_global_caches(pblk); +fail_free_pad_dist: + kfree(pblk->pad_dist); return -ENOMEM; } @@ -354,14 +420,8 @@ static void pblk_core_free(struct pblk *pblk) mempool_destroy(pblk->e_rq_pool); mempool_destroy(pblk->w_rq_pool); - pblk_rwb_free(pblk); - pblk_free_global_caches(pblk); -} - -static void pblk_luns_free(struct pblk *pblk) -{ - kfree(pblk->luns); + kfree(pblk->pad_dist); } static void pblk_line_mg_free(struct pblk *pblk) @@ -378,8 +438,6 @@ static void pblk_line_mg_free(struct pblk *pblk) pblk_mfree(l_mg->eline_meta[i]->buf, l_mg->emeta_alloc_type); kfree(l_mg->eline_meta[i]); } - - kfree(pblk->lines); } static void pblk_line_meta_free(struct pblk_line *line) @@ -402,6 +460,11 @@ static void pblk_lines_free(struct pblk *pblk) pblk_line_meta_free(line); } spin_unlock(&l_mg->free_lock); + + pblk_line_mg_free(pblk); + + kfree(pblk->luns); + kfree(pblk->lines); } static int pblk_bb_get_tbl(struct nvm_tgt_dev *dev, struct pblk_lun *rlun, @@ -476,7 +539,7 @@ static int pblk_bb_line(struct pblk *pblk, struct pblk_line *line, return bb_cnt; } -static int pblk_luns_init(struct pblk *pblk, struct ppa_addr *luns) +static int pblk_luns_init(struct pblk *pblk) { struct nvm_tgt_dev *dev = pblk->dev; struct nvm_geo *geo = &dev->geo; @@ -501,7 +564,7 @@ static int pblk_luns_init(struct pblk *pblk, struct ppa_addr *luns) int lunid = lun_raw + ch * geo->nr_luns; rlun = &pblk->luns[i]; - rlun->bppa = luns[lunid]; + rlun->bppa = dev->luns[lunid]; sema_init(&rlun->wr_sem, 1); } @@ -509,38 +572,6 @@ static int pblk_luns_init(struct pblk *pblk, struct ppa_addr *luns) return 0; } -static int pblk_lines_configure(struct pblk *pblk, int flags) -{ - struct pblk_line *line = NULL; - int ret = 0; - - if (!(flags & NVM_TARGET_FACTORY)) { - line = pblk_recov_l2p(pblk); - if (IS_ERR(line)) { - pr_err("pblk: could not recover l2p table\n"); - ret = -EFAULT; - } - } - -#ifdef CONFIG_NVM_DEBUG - pr_info("pblk init: L2P CRC: %x\n", pblk_l2p_crc(pblk)); -#endif - - /* Free full lines directly as GC has not been started yet */ - pblk_gc_free_full_lines(pblk); - - if (!line) { - /* Configure next line for user data */ - line = pblk_line_get_first_data(pblk); - if (!line) { - pr_err("pblk: line list corrupted\n"); - ret = -EFAULT; - } - } - - return ret; -} - /* See comment over struct line_emeta definition */ static unsigned int calc_emeta_len(struct pblk *pblk) { @@ -606,11 +637,70 @@ static void pblk_set_provision(struct pblk *pblk, long nr_free_blks) atomic_set(&pblk->rl.free_user_blocks, nr_free_blks); } -static int pblk_lines_alloc_metadata(struct pblk *pblk) +static int pblk_setup_line_meta(struct pblk *pblk, struct pblk_line *line, + void *chunk_log, long *nr_bad_blks) { + 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) { + kfree(line->blk_bitmap); + return -ENOMEM; + } + + *nr_bad_blks = pblk_bb_line(pblk, line, chunk_log, lm->blk_per_line); + + return 0; +} + +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; + int i, bb_distance; + + l_mg->nr_lines = geo->nr_chks; + 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->emeta_list); + + l_mg->gc_lists[0] = &l_mg->gc_high_list; + l_mg->gc_lists[1] = &l_mg->gc_mid_list; + l_mg->gc_lists[2] = &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 @@ -656,13 +746,13 @@ static int pblk_lines_alloc_metadata(struct pblk *pblk) } } - l_mg->vsc_list = kcalloc(l_mg->nr_lines, sizeof(__le32), GFP_KERNEL); - if (!l_mg->vsc_list) - goto fail_free_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: @@ -673,69 +763,25 @@ static int pblk_lines_alloc_metadata(struct pblk *pblk) kfree(l_mg->eline_meta[i]->buf); kfree(l_mg->eline_meta[i]); } - 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_setup_line_meta(struct pblk *pblk, struct pblk_line *line, - void *chunk_log, long *nr_bad_blks) -{ - 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) { - kfree(line->blk_bitmap); - return -ENOMEM; - } - - *nr_bad_blks = pblk_bb_line(pblk, line, chunk_log, lm->blk_per_line); - - return 0; -} - -static int pblk_lines_init(struct pblk *pblk) +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_mgmt *l_mg = &pblk->l_mg; struct pblk_line_meta *lm = &pblk->lm; - struct pblk_line *line; - void *chunk_log; unsigned int smeta_len, emeta_len; - long nr_bad_blks = 0, nr_free_blks = 0; - int bb_distance, max_write_ppas, mod; - int i, ret; - - pblk->min_write_pgs = geo->sec_per_pl * (geo->sec_size / PAGE_SIZE); - max_write_ppas = pblk->min_write_pgs * geo->all_luns; - pblk->max_write_pgs = min_t(int, max_write_ppas, NVM_MAX_VLBA); - pblk_set_sec_per_write(pblk, pblk->min_write_pgs); - - if (pblk->max_write_pgs > PBLK_MAX_REQ_ADDRS) { - pr_err("pblk: vector list too big(%u > %u)\n", - pblk->max_write_pgs, PBLK_MAX_REQ_ADDRS); - return -EINVAL; - } - - div_u64_rem(geo->sec_per_chk, pblk->min_write_pgs, &mod); - if (mod) { - pr_err("pblk: bad configuration of sectors/pages\n"); - return -EINVAL; - } - - l_mg->nr_lines = geo->nr_chks; - 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); + int i; lm->sec_per_line = geo->sec_per_chk * geo->all_luns; lm->blk_per_line = geo->all_luns; @@ -787,58 +833,43 @@ static int pblk_lines_init(struct pblk *pblk) return -EINVAL; } - ret = pblk_lines_alloc_metadata(pblk); + return 0; +} + +static int pblk_lines_init(struct pblk *pblk) +{ + struct pblk_line_mgmt *l_mg = &pblk->l_mg; + struct pblk_line_meta *lm = &pblk->lm; + struct pblk_line *line; + void *chunk_log; + long nr_bad_blks = 0, nr_free_blks = 0; + int i, ret; + + ret = pblk_line_meta_init(pblk); if (ret) return ret; - l_mg->bb_template = kzalloc(lm->sec_bitmap_len, GFP_KERNEL); - if (!l_mg->bb_template) { - ret = -ENOMEM; + ret = pblk_line_mg_init(pblk); + if (ret) + return ret; + + ret = pblk_luns_init(pblk); + if (ret) goto fail_free_meta; - } - - l_mg->bb_aux = kzalloc(lm->sec_bitmap_len, GFP_KERNEL); - if (!l_mg->bb_aux) { - ret = -ENOMEM; - goto fail_free_bb_template; - } - - bb_distance = (geo->all_luns) * geo->sec_per_pl; - for (i = 0; i < lm->sec_per_line; i += bb_distance) - bitmap_set(l_mg->bb_template, i, geo->sec_per_pl); - - 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->emeta_list); - - l_mg->gc_lists[0] = &l_mg->gc_high_list; - l_mg->gc_lists[1] = &l_mg->gc_mid_list; - l_mg->gc_lists[2] = &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); - - pblk->lines = kcalloc(l_mg->nr_lines, sizeof(struct pblk_line), - GFP_KERNEL); - if (!pblk->lines) { - ret = -ENOMEM; - goto fail_free_bb_aux; - } chunk_log = pblk_bb_get_log(pblk); if (IS_ERR(chunk_log)) { pr_err("pblk: could not get bad block log (%lu)\n", PTR_ERR(chunk_log)); ret = PTR_ERR(chunk_log); - goto fail_free_bb_aux; + 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_log; } for (i = 0; i < l_mg->nr_lines; i++) { @@ -856,7 +887,7 @@ static int pblk_lines_init(struct pblk *pblk) ret = pblk_setup_line_meta(pblk, line, chunk_log, &nr_bad_blks); if (ret) - goto fail_free_chunk_log; + goto fail_free_lines; chk_in_line = lm->blk_per_line - nr_bad_blks; if (nr_bad_blks < 0 || nr_bad_blks > lm->blk_per_line || @@ -878,14 +909,14 @@ static int pblk_lines_init(struct pblk *pblk) kfree(chunk_log); return 0; -fail_free_chunk_log: - kfree(chunk_log); +fail_free_lines: while (--i >= 0) pblk_line_meta_free(&pblk->lines[i]); -fail_free_bb_aux: - kfree(l_mg->bb_aux); -fail_free_bb_template: - kfree(l_mg->bb_template); + kfree(pblk->lines); +fail_free_chunk_log: + kfree(chunk_log); +fail_free_luns: + kfree(pblk->luns); fail_free_meta: pblk_line_mg_free(pblk); @@ -928,12 +959,10 @@ static void pblk_writer_stop(struct pblk *pblk) static void pblk_free(struct pblk *pblk) { - pblk_luns_free(pblk); pblk_lines_free(pblk); - kfree(pblk->pad_dist); - pblk_line_mg_free(pblk); - pblk_core_free(pblk); pblk_l2p_free(pblk); + pblk_rwb_free(pblk); + pblk_core_free(pblk); kfree(pblk); } @@ -998,19 +1027,6 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk, spin_lock_init(&pblk->trans_lock); spin_lock_init(&pblk->lock); - if (flags & NVM_TARGET_FACTORY) - pblk_setup_uuid(pblk); - - 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; - - atomic64_set(&pblk->nr_flush, 0); - pblk->nr_flush_rst = 0; - #ifdef CONFIG_NVM_DEBUG atomic_long_set(&pblk->inflight_writes, 0); atomic_long_set(&pblk->padded_writes, 0); @@ -1034,48 +1050,35 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk, atomic_long_set(&pblk->write_failed, 0); atomic_long_set(&pblk->erase_failed, 0); - ret = pblk_luns_init(pblk, dev->luns); + ret = pblk_core_init(pblk); if (ret) { - pr_err("pblk: could not initialize luns\n"); + pr_err("pblk: could not initialize core\n"); goto fail; } ret = pblk_lines_init(pblk); if (ret) { pr_err("pblk: could not initialize lines\n"); - goto fail_free_luns; - } - - pblk->pad_dist = kzalloc((pblk->min_write_pgs - 1) * sizeof(atomic64_t), - GFP_KERNEL); - if (!pblk->pad_dist) { - ret = -ENOMEM; - goto fail_free_line_meta; - } - - ret = pblk_core_init(pblk); - if (ret) { - pr_err("pblk: could not initialize core\n"); - goto fail_free_pad_dist; - } - - ret = pblk_l2p_init(pblk); - if (ret) { - pr_err("pblk: could not initialize maps\n"); goto fail_free_core; } - ret = pblk_lines_configure(pblk, flags); + ret = pblk_rwb_init(pblk); if (ret) { - pr_err("pblk: could not configure lines\n"); - goto fail_free_l2p; + pr_err("pblk: could not initialize write buffer\n"); + goto fail_free_lines; + } + + ret = pblk_l2p_init(pblk, flags & NVM_TARGET_FACTORY); + if (ret) { + pr_err("pblk: could not initialize maps\n"); + goto fail_free_rwb; } ret = pblk_writer_init(pblk); if (ret) { if (ret != -EINTR) pr_err("pblk: could not initialize write thread\n"); - goto fail_free_lines; + goto fail_free_l2p; } ret = pblk_gc_init(pblk); @@ -1110,18 +1113,14 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk, fail_stop_writer: pblk_writer_stop(pblk); -fail_free_lines: - pblk_lines_free(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_free_pad_dist: - kfree(pblk->pad_dist); -fail_free_line_meta: - pblk_line_mg_free(pblk); -fail_free_luns: - pblk_luns_free(pblk); fail: kfree(pblk); return ERR_PTR(ret);