diff options
Diffstat (limited to 'drivers/lightnvm/pblk-init.c')
| -rw-r--r-- | drivers/lightnvm/pblk-init.c | 1073 |
1 files changed, 0 insertions, 1073 deletions
diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c deleted file mode 100644 index 1b0f61233c21..000000000000 --- a/drivers/lightnvm/pblk-init.c +++ /dev/null @@ -1,1073 +0,0 @@ -/* - * Copyright (C) 2015 IT University of Copenhagen (rrpc.c) - * Copyright (C) 2016 CNEX Labs - * Initial release: Javier Gonzalez <javier@cnexlabs.com> - * Matias Bjorling <matias@cnexlabs.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License version - * 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * Implementation of a physical block-device target for Open-channel SSDs. - * - * pblk-init.c - pblk's initialization. - */ - -#include "pblk.h" - -static struct kmem_cache *pblk_blk_ws_cache, *pblk_rec_cache, *pblk_g_rq_cache, - *pblk_w_rq_cache, *pblk_line_meta_cache; -static DECLARE_RWSEM(pblk_lock); -struct bio_set *pblk_bio_set; - -static int pblk_rw_io(struct request_queue *q, struct pblk *pblk, - struct bio *bio) -{ - int ret; - - /* Read requests must be <= 256kb due to NVMe's 64 bit completion bitmap - * constraint. Writes can be of arbitrary size. - */ - if (bio_data_dir(bio) == READ) { - blk_queue_split(q, &bio); - ret = pblk_submit_read(pblk, bio); - if (ret == NVM_IO_DONE && bio_flagged(bio, BIO_CLONED)) - bio_put(bio); - - return ret; - } - - /* Prevent deadlock in the case of a modest LUN configuration and large - * user I/Os. Unless stalled, the rate limiter leaves at least 256KB - * available for user I/O. - */ - if (unlikely(pblk_get_secs(bio) >= pblk_rl_sysfs_rate_show(&pblk->rl))) - blk_queue_split(q, &bio); - - return pblk_write_to_cache(pblk, bio, PBLK_IOTYPE_USER); -} - -static blk_qc_t pblk_make_rq(struct request_queue *q, struct bio *bio) -{ - struct pblk *pblk = q->queuedata; - - if (bio_op(bio) == REQ_OP_DISCARD) { - pblk_discard(pblk, bio); - if (!(bio->bi_opf & REQ_PREFLUSH)) { - bio_endio(bio); - return BLK_QC_T_NONE; - } - } - - switch (pblk_rw_io(q, pblk, bio)) { - case NVM_IO_ERR: - bio_io_error(bio); - break; - case NVM_IO_DONE: - bio_endio(bio); - break; - } - - return BLK_QC_T_NONE; -} - -static void pblk_l2p_free(struct pblk *pblk) -{ - vfree(pblk->trans_map); -} - -static int pblk_l2p_init(struct pblk *pblk) -{ - sector_t i; - struct ppa_addr ppa; - int entry_size = 8; - - if (pblk->ppaf_bitsize < 32) - entry_size = 4; - - pblk->trans_map = vmalloc(entry_size * pblk->rl.nr_secs); - if (!pblk->trans_map) - return -ENOMEM; - - pblk_ppa_set_empty(&ppa); - - for (i = 0; i < pblk->rl.nr_secs; i++) - pblk_trans_map_set(pblk, i, ppa); - - return 0; -} - -static void pblk_rwb_free(struct pblk *pblk) -{ - if (pblk_rb_tear_down_check(&pblk->rwb)) - pr_err("pblk: write buffer error on tear down\n"); - - pblk_rb_data_free(&pblk->rwb); - vfree(pblk_rb_entries_ref(&pblk->rwb)); -} - -static int pblk_rwb_init(struct pblk *pblk) -{ - struct nvm_tgt_dev *dev = pblk->dev; - struct nvm_geo *geo = &dev->geo; - struct pblk_rb_entry *entries; - unsigned long nr_entries; - unsigned int power_size, power_seg_sz; - - nr_entries = pblk_rb_calculate_size(pblk->pgs_in_buffer); - - entries = vzalloc(nr_entries * sizeof(struct pblk_rb_entry)); - if (!entries) - return -ENOMEM; - - power_size = get_count_order(nr_entries); - power_seg_sz = get_count_order(geo->sec_size); - - return pblk_rb_init(&pblk->rwb, entries, power_size, power_seg_sz); -} - -/* Minimum pages needed within a lun */ -#define PAGE_POOL_SIZE 16 -#define ADDR_POOL_SIZE 64 - -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; - - /* Re-calculate channel and lun format to adapt to configuration */ - power_len = get_count_order(geo->nr_chnls); - if (1 << power_len != geo->nr_chnls) { - pr_err("pblk: supports only power-of-two channel config.\n"); - return -EINVAL; - } - ppaf.ch_len = power_len; - - power_len = get_count_order(geo->luns_per_chnl); - if (1 << power_len != geo->luns_per_chnl) { - pr_err("pblk: supports only power-of-two LUN config.\n"); - return -EINVAL; - } - ppaf.lun_len = power_len; - - pblk->ppaf.sec_offset = 0; - pblk->ppaf.pln_offset = ppaf.sect_len; - pblk->ppaf.ch_offset = pblk->ppaf.pln_offset + ppaf.pln_len; - pblk->ppaf.lun_offset = pblk->ppaf.ch_offset + ppaf.ch_len; - pblk->ppaf.pg_offset = pblk->ppaf.lun_offset + ppaf.lun_len; - pblk->ppaf.blk_offset = pblk->ppaf.pg_offset + ppaf.pg_len; - pblk->ppaf.sec_mask = (1ULL << ppaf.sect_len) - 1; - pblk->ppaf.pln_mask = ((1ULL << ppaf.pln_len) - 1) << - pblk->ppaf.pln_offset; - pblk->ppaf.ch_mask = ((1ULL << ppaf.ch_len) - 1) << - pblk->ppaf.ch_offset; - pblk->ppaf.lun_mask = ((1ULL << ppaf.lun_len) - 1) << - pblk->ppaf.lun_offset; - pblk->ppaf.pg_mask = ((1ULL << ppaf.pg_len) - 1) << - pblk->ppaf.pg_offset; - pblk->ppaf.blk_mask = ((1ULL << ppaf.blk_len) - 1) << - pblk->ppaf.blk_offset; - - pblk->ppaf_bitsize = pblk->ppaf.blk_offset + ppaf.blk_len; - - return 0; -} - -static int pblk_init_global_caches(struct pblk *pblk) -{ - char cache_name[PBLK_CACHE_NAME_LEN]; - - down_write(&pblk_lock); - pblk_blk_ws_cache = kmem_cache_create("pblk_blk_ws", - sizeof(struct pblk_line_ws), 0, 0, NULL); - if (!pblk_blk_ws_cache) { - up_write(&pblk_lock); - return -ENOMEM; - } - - pblk_rec_cache = kmem_cache_create("pblk_rec", - sizeof(struct pblk_rec_ctx), 0, 0, NULL); - if (!pblk_rec_cache) { - kmem_cache_destroy(pblk_blk_ws_cache); - up_write(&pblk_lock); - return -ENOMEM; - } - - pblk_g_rq_cache = kmem_cache_create("pblk_g_rq", pblk_g_rq_size, - 0, 0, NULL); - if (!pblk_g_rq_cache) { - kmem_cache_destroy(pblk_blk_ws_cache); - kmem_cache_destroy(pblk_rec_cache); - up_write(&pblk_lock); - return -ENOMEM; - } - - pblk_w_rq_cache = kmem_cache_create("pblk_w_rq", pblk_w_rq_size, - 0, 0, NULL); - if (!pblk_w_rq_cache) { - kmem_cache_destroy(pblk_blk_ws_cache); - kmem_cache_destroy(pblk_rec_cache); - kmem_cache_destroy(pblk_g_rq_cache); - up_write(&pblk_lock); - return -ENOMEM; - } - - snprintf(cache_name, sizeof(cache_name), "pblk_line_m_%s", - pblk->disk->disk_name); - pblk_line_meta_cache = kmem_cache_create(cache_name, - pblk->lm.sec_bitmap_len, 0, 0, NULL); - if (!pblk_line_meta_cache) { - kmem_cache_destroy(pblk_blk_ws_cache); - kmem_cache_destroy(pblk_rec_cache); - kmem_cache_destroy(pblk_g_rq_cache); - kmem_cache_destroy(pblk_w_rq_cache); - up_write(&pblk_lock); - return -ENOMEM; - } - up_write(&pblk_lock); - - return 0; -} - -static int pblk_core_init(struct pblk *pblk) -{ - struct nvm_tgt_dev *dev = pblk->dev; - struct nvm_geo *geo = &dev->geo; - - pblk->pgs_in_buffer = NVM_MEM_PAGE_WRITE * geo->sec_per_pg * - geo->nr_planes * geo->nr_luns; - - if (pblk_init_global_caches(pblk)) - return -ENOMEM; - - pblk->page_pool = mempool_create_page_pool(PAGE_POOL_SIZE, 0); - if (!pblk->page_pool) - return -ENOMEM; - - pblk->line_ws_pool = mempool_create_slab_pool(PBLK_WS_POOL_SIZE, - pblk_blk_ws_cache); - if (!pblk->line_ws_pool) - goto free_page_pool; - - pblk->rec_pool = mempool_create_slab_pool(geo->nr_luns, pblk_rec_cache); - if (!pblk->rec_pool) - goto free_blk_ws_pool; - - pblk->g_rq_pool = mempool_create_slab_pool(PBLK_READ_REQ_POOL_SIZE, - pblk_g_rq_cache); - if (!pblk->g_rq_pool) - goto free_rec_pool; - - pblk->w_rq_pool = mempool_create_slab_pool(geo->nr_luns * 2, - pblk_w_rq_cache); - if (!pblk->w_rq_pool) - goto free_g_rq_pool; - - pblk->line_meta_pool = - mempool_create_slab_pool(PBLK_META_POOL_SIZE, - pblk_line_meta_cache); - if (!pblk->line_meta_pool) - goto free_w_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_line_meta_pool; - - pblk->bb_wq = alloc_workqueue("pblk-bb-wq", - WQ_MEM_RECLAIM | WQ_UNBOUND, 0); - if (!pblk->bb_wq) - goto free_close_wq; - - if (pblk_set_ppaf(pblk)) - goto free_bb_wq; - - if (pblk_rwb_init(pblk)) - goto free_bb_wq; - - INIT_LIST_HEAD(&pblk->compl_list); - return 0; - -free_bb_wq: - destroy_workqueue(pblk->bb_wq); -free_close_wq: - destroy_workqueue(pblk->close_wq); -free_line_meta_pool: - mempool_destroy(pblk->line_meta_pool); -free_w_rq_pool: - mempool_destroy(pblk->w_rq_pool); -free_g_rq_pool: - mempool_destroy(pblk->g_rq_pool); -free_rec_pool: - mempool_destroy(pblk->rec_pool); -free_blk_ws_pool: - mempool_destroy(pblk->line_ws_pool); -free_page_pool: - mempool_destroy(pblk->page_pool); - return -ENOMEM; -} - -static void pblk_core_free(struct pblk *pblk) -{ - if (pblk->close_wq) - destroy_workqueue(pblk->close_wq); - - if (pblk->bb_wq) - destroy_workqueue(pblk->bb_wq); - - mempool_destroy(pblk->page_pool); - mempool_destroy(pblk->line_ws_pool); - mempool_destroy(pblk->rec_pool); - mempool_destroy(pblk->g_rq_pool); - mempool_destroy(pblk->w_rq_pool); - mempool_destroy(pblk->line_meta_pool); - - kmem_cache_destroy(pblk_blk_ws_cache); - kmem_cache_destroy(pblk_rec_cache); - kmem_cache_destroy(pblk_g_rq_cache); - kmem_cache_destroy(pblk_w_rq_cache); - kmem_cache_destroy(pblk_line_meta_cache); -} - -static void pblk_luns_free(struct pblk *pblk) -{ - kfree(pblk->luns); -} - -static void pblk_free_line_bitmaps(struct pblk_line *line) -{ - kfree(line->blk_bitmap); - kfree(line->erase_bitmap); -} - -static void pblk_lines_free(struct pblk *pblk) -{ - struct pblk_line_mgmt *l_mg = &pblk->l_mg; - struct pblk_line *line; - int i; - - spin_lock(&l_mg->free_lock); - for (i = 0; i < l_mg->nr_lines; i++) { - line = &pblk->lines[i]; - - pblk_line_free(pblk, line); - pblk_free_line_bitmaps(line); - } - spin_unlock(&l_mg->free_lock); -} - -static void pblk_line_meta_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); - - spin_lock(&l_mg->free_lock); - for (i = 0; i < PBLK_DATA_LINES; i++) { - kfree(l_mg->sline_meta[i]); - pblk_mfree(l_mg->eline_meta[i]->buf, l_mg->emeta_alloc_type); - kfree(l_mg->eline_meta[i]); - } - spin_unlock(&l_mg->free_lock); - - kfree(pblk->lines); -} - -static int pblk_bb_discovery(struct nvm_tgt_dev *dev, struct pblk_lun *rlun) -{ - struct nvm_geo *geo = &dev->geo; - struct ppa_addr ppa; - u8 *blks; - int nr_blks, ret; - - nr_blks = geo->blks_per_lun * geo->plane_mode; - blks = kmalloc(nr_blks, GFP_KERNEL); - if (!blks) - return -ENOMEM; - - ppa.ppa = 0; - ppa.g.ch = rlun->bppa.g.ch; - ppa.g.lun = rlun->bppa.g.lun; - - ret = nvm_get_tgt_bb_tbl(dev, ppa, blks); - if (ret) - goto out; - - nr_blks = nvm_bb_tbl_fold(dev->parent, blks, nr_blks); - if (nr_blks < 0) { - ret = nr_blks; - goto out; - } - - rlun->bb_list = blks; - - return 0; -out: - kfree(blks); - return ret; -} - -static int pblk_bb_line(struct pblk *pblk, struct pblk_line *line, - int blk_per_line) -{ - struct nvm_tgt_dev *dev = pblk->dev; - struct nvm_geo *geo = &dev->geo; - struct pblk_lun *rlun; - int bb_cnt = 0; - int i; - - for (i = 0; i < blk_per_line; i++) { - rlun = &pblk->luns[i]; - if (rlun->bb_list[line->id] == NVM_BLK_T_FREE) - continue; - - set_bit(pblk_ppa_to_pos(geo, rlun->bppa), line->blk_bitmap); - bb_cnt++; - } - - return bb_cnt; -} - -static int pblk_alloc_line_bitmaps(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) { - kfree(line->blk_bitmap); - return -ENOMEM; - } - - return 0; -} - -static int pblk_luns_init(struct pblk *pblk, struct ppa_addr *luns) -{ - struct nvm_tgt_dev *dev = pblk->dev; - struct nvm_geo *geo = &dev->geo; - struct pblk_lun *rlun; - int i, ret; - - /* TODO: Implement unbalanced LUN support */ - if (geo->luns_per_chnl < 0) { - pr_err("pblk: unbalanced LUN config.\n"); - return -EINVAL; - } - - pblk->luns = kcalloc(geo->nr_luns, sizeof(struct pblk_lun), GFP_KERNEL); - if (!pblk->luns) - return -ENOMEM; - - for (i = 0; i < geo->nr_luns; i++) { - /* Stripe across channels */ - int ch = i % geo->nr_chnls; - int lun_raw = i / geo->nr_chnls; - int lunid = lun_raw + ch * geo->luns_per_chnl; - - rlun = &pblk->luns[i]; - rlun->bppa = luns[lunid]; - - sema_init(&rlun->wr_sem, 1); - - ret = pblk_bb_discovery(dev, rlun); - if (ret) { - while (--i >= 0) - kfree(pblk->luns[i].bb_list); - return ret; - } - } - - 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; - } - } - - 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) -{ - 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, - geo->sec_size); - lm->emeta_len[1] = lm->emeta_sec[1] * geo->sec_size; - - /* 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->sec_size); - lm->emeta_len[2] = lm->emeta_sec[2] * geo->sec_size; - - lm->emeta_sec[3] = DIV_ROUND_UP(l_mg->nr_lines * sizeof(u32), - geo->sec_size); - lm->emeta_len[3] = lm->emeta_sec[3] * geo->sec_size; - - lm->vsc_list_len = l_mg->nr_lines * sizeof(u32); - - return (lm->emeta_len[1] + lm->emeta_len[2] + lm->emeta_len[3]); -} - -static void pblk_set_provision(struct pblk *pblk, long nr_free_blks) -{ - struct nvm_tgt_dev *dev = pblk->dev; - struct nvm_geo *geo = &dev->geo; - sector_t provisioned; - - pblk->over_pct = 20; - - provisioned = nr_free_blks; - provisioned *= (100 - pblk->over_pct); - sector_div(provisioned, 100); - - /* Internally pblk manages all free blocks, but all calculations based - * on user capacity consider only provisioned blocks - */ - pblk->rl.total_blocks = nr_free_blks; - pblk->rl.nr_secs = nr_free_blks * geo->sec_per_blk; - pblk->capacity = provisioned * geo->sec_per_blk; - atomic_set(&pblk->rl.free_blocks, nr_free_blks); -} - -static int pblk_lines_alloc_metadata(struct pblk *pblk) -{ - struct pblk_line_mgmt *l_mg = &pblk->l_mg; - struct pblk_line_meta *lm = &pblk->lm; - int i; - - /* 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; - } - - /* 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; - - if (lm->emeta_len[0] > KMALLOC_MAX_CACHE_SIZE) { - l_mg->emeta_alloc_type = PBLK_VMALLOC_META; - - emeta->buf = vmalloc(lm->emeta_len[0]); - if (!emeta->buf) { - kfree(emeta); - goto fail_free_emeta; - } - - emeta->nr_entries = lm->emeta_sec[0]; - l_mg->eline_meta[i] = emeta; - } else { - l_mg->emeta_alloc_type = PBLK_KMALLOC_META; - - emeta->buf = kmalloc(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; - } - } - - 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); - - return 0; - -fail_free_emeta: - while (--i >= 0) { - vfree(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]); - - return -ENOMEM; -} - -static int pblk_lines_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; - unsigned int smeta_len, emeta_len; - long nr_bad_blks, nr_free_blks; - 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->nr_luns; - pblk->max_write_pgs = (max_write_ppas < nvm_max_phys_sects(dev)) ? - max_write_ppas : nvm_max_phys_sects(dev); - pblk_set_sec_per_write(pblk, pblk->min_write_pgs); - - if (pblk->max_write_pgs > PBLK_MAX_REQ_ADDRS) { - pr_err("pblk: cannot support device max_phys_sect\n"); - return -EINVAL; - } - - div_u64_rem(geo->sec_per_blk, pblk->min_write_pgs, &mod); - if (mod) { - pr_err("pblk: bad configuration of sectors/pages\n"); - return -EINVAL; - } - - l_mg->nr_lines = geo->blks_per_lun; - 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); - - lm->sec_per_line = geo->sec_per_blk * geo->nr_luns; - lm->blk_per_line = geo->nr_luns; - lm->blk_bitmap_len = BITS_TO_LONGS(geo->nr_luns) * sizeof(long); - lm->sec_bitmap_len = BITS_TO_LONGS(lm->sec_per_line) * sizeof(long); - lm->lun_bitmap_len = BITS_TO_LONGS(geo->nr_luns) * sizeof(long); - lm->high_thrs = lm->sec_per_line / 2; - lm->mid_thrs = lm->sec_per_line / 4; - lm->meta_distance = (geo->nr_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->sec_per_pl; - lm->smeta_len = lm->smeta_sec * geo->sec_size; - - 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->sec_per_pl; - lm->emeta_len[0] = lm->emeta_sec[0] * geo->sec_size; - - emeta_len = calc_emeta_len(pblk); - if (emeta_len > lm->emeta_len[0]) { - i++; - goto add_emeta_page; - } - - lm->emeta_bb = geo->nr_luns - i; - lm->min_blk_line = 1 + DIV_ROUND_UP(lm->smeta_sec + lm->emeta_sec[0], - geo->sec_per_blk); - if (lm->min_blk_line > lm->blk_per_line) { - pr_err("pblk: config. not supported. Min. LUN in line:%d\n", - lm->blk_per_line); - ret = -EINVAL; - goto fail; - } - - ret = pblk_lines_alloc_metadata(pblk); - if (ret) - goto fail; - - l_mg->bb_template = kzalloc(lm->sec_bitmap_len, GFP_KERNEL); - if (!l_mg->bb_template) { - ret = -ENOMEM; - 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->nr_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; - } - - nr_free_blks = 0; - for (i = 0; i < l_mg->nr_lines; i++) { - int blk_in_line; - - line = &pblk->lines[i]; - - line->pblk = pblk; - line->id = i; - line->type = PBLK_LINETYPE_FREE; - line->state = PBLK_LINESTATE_FREE; - line->gc_group = PBLK_LINEGC_NONE; - line->vsc = &l_mg->vsc_list[i]; - spin_lock_init(&line->lock); - - ret = pblk_alloc_line_bitmaps(pblk, line); - if (ret) - goto fail_free_lines; - - nr_bad_blks = pblk_bb_line(pblk, line, lm->blk_per_line); - if (nr_bad_blks < 0 || nr_bad_blks > lm->blk_per_line) { - pblk_free_line_bitmaps(line); - ret = -EINVAL; - goto fail_free_lines; - } - - blk_in_line = lm->blk_per_line - nr_bad_blks; - if (blk_in_line < lm->min_blk_line) { - line->state = PBLK_LINESTATE_BAD; - list_add_tail(&line->list, &l_mg->bad_list); - continue; - } - - nr_free_blks += blk_in_line; - atomic_set(&line->blk_in_line, blk_in_line); - - l_mg->nr_free_lines++; - list_add_tail(&line->list, &l_mg->free_list); - } - - pblk_set_provision(pblk, nr_free_blks); - - /* Cleanup per-LUN bad block lists - managed within lines on run-time */ - for (i = 0; i < geo->nr_luns; i++) - kfree(pblk->luns[i].bb_list); - - return 0; -fail_free_lines: - while (--i >= 0) - pblk_free_line_bitmaps(&pblk->lines[i]); -fail_free_bb_aux: - kfree(l_mg->bb_aux); -fail_free_bb_template: - kfree(l_mg->bb_template); -fail_free_meta: - pblk_line_meta_free(pblk); -fail: - for (i = 0; i < geo->nr_luns; i++) - kfree(pblk->luns[i].bb_list); - - return ret; -} - -static int pblk_writer_init(struct pblk *pblk) -{ - setup_timer(&pblk->wtimer, pblk_write_timer_fn, (unsigned long)pblk); - mod_timer(&pblk->wtimer, jiffies + msecs_to_jiffies(100)); - - pblk->writer_ts = kthread_create(pblk_write_ts, pblk, "pblk-writer-t"); - if (IS_ERR(pblk->writer_ts)) { - pr_err("pblk: could not allocate writer kthread\n"); - return PTR_ERR(pblk->writer_ts); - } - - 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"); - - if (pblk->writer_ts) - kthread_stop(pblk->writer_ts); - del_timer(&pblk->wtimer); -} - -static void pblk_free(struct pblk *pblk) -{ - pblk_luns_free(pblk); - pblk_lines_free(pblk); - pblk_line_meta_free(pblk); - pblk_core_free(pblk); - pblk_l2p_free(pblk); - - kfree(pblk); -} - -static void pblk_tear_down(struct pblk *pblk) -{ - pblk_pipeline_stop(pblk); - pblk_writer_stop(pblk); - pblk_rb_sync_l2p(&pblk->rwb); - pblk_rwb_free(pblk); - pblk_rl_free(&pblk->rl); - - pr_debug("pblk: consistent tear down\n"); -} - -static void pblk_exit(void *private) -{ - struct pblk *pblk = private; - - down_write(&pblk_lock); - pblk_gc_exit(pblk); - pblk_tear_down(pblk); - pblk_free(pblk); - up_write(&pblk_lock); -} - -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; - - if (dev->identity.dom & NVM_RSP_L2P) { - pr_err("pblk: device-side L2P table not supported. (%x)\n", - dev->identity.dom); - return ERR_PTR(-EINVAL); - } - - pblk = kzalloc(sizeof(struct pblk), GFP_KERNEL); - if (!pblk) - return ERR_PTR(-ENOMEM); - - pblk->dev = dev; - pblk->disk = tdisk; - pblk->state = PBLK_STATE_RUNNING; - - spin_lock_init(&pblk->trans_lock); - spin_lock_init(&pblk->lock); - - if (flags & NVM_TARGET_FACTORY) - pblk_setup_uuid(pblk); - -#ifdef CONFIG_NVM_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->nr_flush, 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); -#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_luns_init(pblk, dev->luns); - if (ret) { - pr_err("pblk: could not initialize luns\n"); - goto fail; - } - - ret = pblk_lines_init(pblk); - if (ret) { - pr_err("pblk: could not initialize lines\n"); - goto fail_free_luns; - } - - ret = pblk_core_init(pblk); - if (ret) { - pr_err("pblk: could not initialize core\n"); - goto fail_free_line_meta; - } - - 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); - if (ret) { - pr_err("pblk: could not configure lines\n"); - goto fail_free_l2p; - } - - ret = pblk_writer_init(pblk); - if (ret) { - pr_err("pblk: could not initialize write thread\n"); - goto fail_free_lines; - } - - ret = pblk_gc_init(pblk); - if (ret) { - pr_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->pgs_per_blk * geo->pfpg_size; - tqueue->limits.discard_alignment = 0; - blk_queue_max_discard_sectors(tqueue, UINT_MAX >> 9); - queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, tqueue); - - pr_info("pblk init: luns:%u, lines:%d, secs:%llu, buf entries:%u\n", - geo->nr_luns, pblk->l_mg.nr_lines, - (unsigned long long)pblk->rl.nr_secs, - pblk->rwb.nr_entries); - - wake_up_process(pblk->writer_ts); - return pblk; - -fail_stop_writer: - pblk_writer_stop(pblk); -fail_free_lines: - pblk_lines_free(pblk); -fail_free_l2p: - pblk_l2p_free(pblk); -fail_free_core: - pblk_core_free(pblk); -fail_free_line_meta: - pblk_line_meta_free(pblk); -fail_free_luns: - pblk_luns_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}, - - .make_rq = pblk_make_rq, - .capacity = pblk_capacity, - - .init = pblk_init, - .exit = pblk_exit, - - .sysfs_init = pblk_sysfs_init, - .sysfs_exit = pblk_sysfs_exit, -}; - -static int __init pblk_module_init(void) -{ - int ret; - - pblk_bio_set = bioset_create(BIO_POOL_SIZE, 0, 0); - if (!pblk_bio_set) - return -ENOMEM; - ret = nvm_register_tgt_type(&tt_pblk); - if (ret) - bioset_free(pblk_bio_set); - return ret; -} - -static void pblk_module_exit(void) -{ - bioset_free(pblk_bio_set); - nvm_unregister_tgt_type(&tt_pblk); -} - -module_init(pblk_module_init); -module_exit(pblk_module_exit); -MODULE_AUTHOR("Javier Gonzalez <javier@cnexlabs.com>"); -MODULE_AUTHOR("Matias Bjorling <matias@cnexlabs.com>"); -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("Physical Block-Device for Open-Channel SSDs"); |