Javier González | 02a1520 | 2018-10-09 13:12:06 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C) 2016 CNEX Labs |
| 4 | * Initial release: Javier Gonzalez <javier@cnexlabs.com> |
| 5 | * Matias Bjorling <matias@cnexlabs.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License version |
| 9 | * 2 as published by the Free Software Foundation. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, but |
| 12 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * General Public License for more details. |
| 15 | * |
| 16 | * pblk-write.c - pblk's write path from write buffer to media |
| 17 | */ |
| 18 | |
| 19 | #include "pblk.h" |
Hans Holmberg | 4c44abf | 2018-10-09 13:11:52 +0200 | [diff] [blame] | 20 | #include "pblk-trace.h" |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 21 | |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 22 | static unsigned long pblk_end_w_bio(struct pblk *pblk, struct nvm_rq *rqd, |
| 23 | struct pblk_c_ctx *c_ctx) |
| 24 | { |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 25 | struct bio *original_bio; |
Hans Holmberg | 533657c1 | 2018-01-05 14:16:10 +0100 | [diff] [blame] | 26 | struct pblk_rb *rwb = &pblk->rwb; |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 27 | unsigned long ret; |
| 28 | int i; |
| 29 | |
| 30 | for (i = 0; i < c_ctx->nr_valid; i++) { |
| 31 | struct pblk_w_ctx *w_ctx; |
Hans Holmberg | 533657c1 | 2018-01-05 14:16:10 +0100 | [diff] [blame] | 32 | int pos = c_ctx->sentry + i; |
| 33 | int flags; |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 34 | |
Hans Holmberg | 533657c1 | 2018-01-05 14:16:10 +0100 | [diff] [blame] | 35 | w_ctx = pblk_rb_w_ctx(rwb, pos); |
| 36 | flags = READ_ONCE(w_ctx->flags); |
| 37 | |
| 38 | if (flags & PBLK_FLUSH_ENTRY) { |
| 39 | flags &= ~PBLK_FLUSH_ENTRY; |
| 40 | /* Release flags on context. Protect from writes */ |
| 41 | smp_store_release(&w_ctx->flags, flags); |
| 42 | |
Matias Bjørling | 880eda5 | 2018-07-13 10:48:37 +0200 | [diff] [blame] | 43 | #ifdef CONFIG_NVM_PBLK_DEBUG |
Hans Holmberg | 533657c1 | 2018-01-05 14:16:10 +0100 | [diff] [blame] | 44 | atomic_dec(&rwb->inflight_flush_point); |
| 45 | #endif |
| 46 | } |
| 47 | |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 48 | while ((original_bio = bio_list_pop(&w_ctx->bios))) |
| 49 | bio_endio(original_bio); |
| 50 | } |
| 51 | |
Javier González | cd8ddbf | 2017-10-13 14:46:03 +0200 | [diff] [blame] | 52 | if (c_ctx->nr_padded) |
| 53 | pblk_bio_free_pages(pblk, rqd->bio, c_ctx->nr_valid, |
| 54 | c_ctx->nr_padded); |
| 55 | |
Matias Bjørling | 880eda5 | 2018-07-13 10:48:37 +0200 | [diff] [blame] | 56 | #ifdef CONFIG_NVM_PBLK_DEBUG |
Javier González | e0e12a7 | 2017-10-13 14:46:04 +0200 | [diff] [blame] | 57 | atomic_long_add(rqd->nr_ppas, &pblk->sync_writes); |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 58 | #endif |
| 59 | |
| 60 | ret = pblk_rb_sync_advance(&pblk->rwb, c_ctx->nr_valid); |
| 61 | |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 62 | bio_put(rqd->bio); |
Javier González | e2cddf2 | 2017-10-13 14:46:19 +0200 | [diff] [blame] | 63 | pblk_free_rqd(pblk, rqd, PBLK_WRITE); |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 64 | |
| 65 | return ret; |
| 66 | } |
| 67 | |
| 68 | static unsigned long pblk_end_queued_w_bio(struct pblk *pblk, |
| 69 | struct nvm_rq *rqd, |
| 70 | struct pblk_c_ctx *c_ctx) |
| 71 | { |
| 72 | list_del(&c_ctx->list); |
| 73 | return pblk_end_w_bio(pblk, rqd, c_ctx); |
| 74 | } |
| 75 | |
| 76 | static void pblk_complete_write(struct pblk *pblk, struct nvm_rq *rqd, |
| 77 | struct pblk_c_ctx *c_ctx) |
| 78 | { |
| 79 | struct pblk_c_ctx *c, *r; |
| 80 | unsigned long flags; |
| 81 | unsigned long pos; |
| 82 | |
Matias Bjørling | 880eda5 | 2018-07-13 10:48:37 +0200 | [diff] [blame] | 83 | #ifdef CONFIG_NVM_PBLK_DEBUG |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 84 | atomic_long_sub(c_ctx->nr_valid, &pblk->inflight_writes); |
| 85 | #endif |
Hans Holmberg | e99e802 | 2018-10-09 13:11:48 +0200 | [diff] [blame] | 86 | pblk_up_rq(pblk, c_ctx->lun_bitmap); |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 87 | |
| 88 | pos = pblk_rb_sync_init(&pblk->rwb, &flags); |
| 89 | if (pos == c_ctx->sentry) { |
| 90 | pos = pblk_end_w_bio(pblk, rqd, c_ctx); |
| 91 | |
| 92 | retry: |
| 93 | list_for_each_entry_safe(c, r, &pblk->compl_list, list) { |
| 94 | rqd = nvm_rq_from_c_ctx(c); |
| 95 | if (c->sentry == pos) { |
| 96 | pos = pblk_end_queued_w_bio(pblk, rqd, c); |
| 97 | goto retry; |
| 98 | } |
| 99 | } |
| 100 | } else { |
| 101 | WARN_ON(nvm_rq_from_c_ctx(c_ctx) != rqd); |
| 102 | list_add_tail(&c_ctx->list, &pblk->compl_list); |
| 103 | } |
| 104 | pblk_rb_sync_end(&pblk->rwb, &flags); |
| 105 | } |
| 106 | |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 107 | /* Map remaining sectors in chunk, starting from ppa */ |
Hans Holmberg | ab3887b | 2018-12-11 20:16:11 +0100 | [diff] [blame] | 108 | static void pblk_map_remaining(struct pblk *pblk, struct ppa_addr *ppa, |
| 109 | int rqd_ppas) |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 110 | { |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 111 | struct pblk_line *line; |
| 112 | struct ppa_addr map_ppa = *ppa; |
Hans Holmberg | ab3887b | 2018-12-11 20:16:11 +0100 | [diff] [blame] | 113 | __le64 addr_empty = cpu_to_le64(ADDR_EMPTY); |
| 114 | __le64 *lba_list; |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 115 | u64 paddr; |
| 116 | int done = 0; |
Hans Holmberg | ab3887b | 2018-12-11 20:16:11 +0100 | [diff] [blame] | 117 | int n = 0; |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 118 | |
Javier González | cb21665 | 2018-10-09 13:11:42 +0200 | [diff] [blame] | 119 | line = pblk_ppa_to_line(pblk, *ppa); |
Hans Holmberg | ab3887b | 2018-12-11 20:16:11 +0100 | [diff] [blame] | 120 | lba_list = emeta_to_lbas(pblk, line->emeta->buf); |
| 121 | |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 122 | spin_lock(&line->lock); |
| 123 | |
| 124 | while (!done) { |
| 125 | paddr = pblk_dev_ppa_to_line_addr(pblk, map_ppa); |
| 126 | |
| 127 | if (!test_and_set_bit(paddr, line->map_bitmap)) |
| 128 | line->left_msecs--; |
| 129 | |
Hans Holmberg | ab3887b | 2018-12-11 20:16:11 +0100 | [diff] [blame] | 130 | if (n < rqd_ppas && lba_list[paddr] != addr_empty) |
| 131 | line->nr_valid_lbas--; |
| 132 | |
| 133 | lba_list[paddr] = addr_empty; |
| 134 | |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 135 | if (!test_and_set_bit(paddr, line->invalid_bitmap)) |
| 136 | le32_add_cpu(line->vsc, -1); |
| 137 | |
Hans Holmberg | bf82fa2 | 2018-10-09 13:11:59 +0200 | [diff] [blame] | 138 | done = nvm_next_ppa_in_chk(pblk->dev, &map_ppa); |
Hans Holmberg | ab3887b | 2018-12-11 20:16:11 +0100 | [diff] [blame] | 139 | |
| 140 | n++; |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 141 | } |
| 142 | |
Hans Holmberg | 48b8d20 | 2018-06-01 16:41:06 +0200 | [diff] [blame] | 143 | line->w_err_gc->has_write_err = 1; |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 144 | spin_unlock(&line->lock); |
| 145 | } |
| 146 | |
| 147 | static void pblk_prepare_resubmit(struct pblk *pblk, unsigned int sentry, |
| 148 | unsigned int nr_entries) |
| 149 | { |
| 150 | struct pblk_rb *rb = &pblk->rwb; |
| 151 | struct pblk_rb_entry *entry; |
| 152 | struct pblk_line *line; |
| 153 | struct pblk_w_ctx *w_ctx; |
| 154 | struct ppa_addr ppa_l2p; |
| 155 | int flags; |
Javier González | 40b8657 | 2018-10-09 13:12:09 +0200 | [diff] [blame] | 156 | unsigned int i; |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 157 | |
| 158 | spin_lock(&pblk->trans_lock); |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 159 | for (i = 0; i < nr_entries; i++) { |
Javier González | 40b8657 | 2018-10-09 13:12:09 +0200 | [diff] [blame] | 160 | entry = &rb->entries[pblk_rb_ptr_wrap(rb, sentry, i)]; |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 161 | w_ctx = &entry->w_ctx; |
| 162 | |
| 163 | /* Check if the lba has been overwritten */ |
Hans Holmberg | c12fa40 | 2018-12-11 20:16:10 +0100 | [diff] [blame] | 164 | if (w_ctx->lba != ADDR_EMPTY) { |
| 165 | ppa_l2p = pblk_trans_map_get(pblk, w_ctx->lba); |
| 166 | if (!pblk_ppa_comp(ppa_l2p, entry->cacheline)) |
| 167 | w_ctx->lba = ADDR_EMPTY; |
| 168 | } |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 169 | |
| 170 | /* Mark up the entry as submittable again */ |
| 171 | flags = READ_ONCE(w_ctx->flags); |
| 172 | flags |= PBLK_WRITTEN_DATA; |
| 173 | /* Release flags on write context. Protect from writes */ |
| 174 | smp_store_release(&w_ctx->flags, flags); |
| 175 | |
Javier González | 2e696f9 | 2018-10-09 13:11:43 +0200 | [diff] [blame] | 176 | /* Decrease the reference count to the line as we will |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 177 | * re-map these entries |
| 178 | */ |
Javier González | cb21665 | 2018-10-09 13:11:42 +0200 | [diff] [blame] | 179 | line = pblk_ppa_to_line(pblk, w_ctx->ppa); |
Heiner Litz | 0586942 | 2019-02-11 13:25:09 +0100 | [diff] [blame] | 180 | atomic_dec(&line->sec_to_update); |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 181 | kref_put(&line->ref, pblk_line_put); |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 182 | } |
| 183 | spin_unlock(&pblk->trans_lock); |
| 184 | } |
| 185 | |
| 186 | static void pblk_queue_resubmit(struct pblk *pblk, struct pblk_c_ctx *c_ctx) |
| 187 | { |
| 188 | struct pblk_c_ctx *r_ctx; |
| 189 | |
| 190 | r_ctx = kzalloc(sizeof(struct pblk_c_ctx), GFP_KERNEL); |
| 191 | if (!r_ctx) |
| 192 | return; |
| 193 | |
| 194 | r_ctx->lun_bitmap = NULL; |
| 195 | r_ctx->sentry = c_ctx->sentry; |
| 196 | r_ctx->nr_valid = c_ctx->nr_valid; |
| 197 | r_ctx->nr_padded = c_ctx->nr_padded; |
| 198 | |
| 199 | spin_lock(&pblk->resubmit_lock); |
| 200 | list_add_tail(&r_ctx->list, &pblk->resubmit_list); |
| 201 | spin_unlock(&pblk->resubmit_lock); |
| 202 | |
Matias Bjørling | 880eda5 | 2018-07-13 10:48:37 +0200 | [diff] [blame] | 203 | #ifdef CONFIG_NVM_PBLK_DEBUG |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 204 | atomic_long_add(c_ctx->nr_valid, &pblk->recov_writes); |
| 205 | #endif |
| 206 | } |
| 207 | |
| 208 | static void pblk_submit_rec(struct work_struct *work) |
| 209 | { |
| 210 | struct pblk_rec_ctx *recovery = |
| 211 | container_of(work, struct pblk_rec_ctx, ws_rec); |
| 212 | struct pblk *pblk = recovery->pblk; |
| 213 | struct nvm_rq *rqd = recovery->rqd; |
| 214 | struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd); |
Hans Holmberg | d68a934 | 2018-10-09 13:11:46 +0200 | [diff] [blame] | 215 | struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd); |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 216 | |
| 217 | pblk_log_write_err(pblk, rqd); |
| 218 | |
Hans Holmberg | ab3887b | 2018-12-11 20:16:11 +0100 | [diff] [blame] | 219 | pblk_map_remaining(pblk, ppa_list, rqd->nr_ppas); |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 220 | pblk_queue_resubmit(pblk, c_ctx); |
| 221 | |
Hans Holmberg | e99e802 | 2018-10-09 13:11:48 +0200 | [diff] [blame] | 222 | pblk_up_rq(pblk, c_ctx->lun_bitmap); |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 223 | if (c_ctx->nr_padded) |
| 224 | pblk_bio_free_pages(pblk, rqd->bio, c_ctx->nr_valid, |
| 225 | c_ctx->nr_padded); |
| 226 | bio_put(rqd->bio); |
| 227 | pblk_free_rqd(pblk, rqd, PBLK_WRITE); |
| 228 | mempool_free(recovery, &pblk->rec_pool); |
| 229 | |
| 230 | atomic_dec(&pblk->inflight_io); |
Igor Konopko | 74a37fb | 2019-05-04 20:38:00 +0200 | [diff] [blame] | 231 | pblk_write_kick(pblk); |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 232 | } |
| 233 | |
| 234 | |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 235 | static void pblk_end_w_fail(struct pblk *pblk, struct nvm_rq *rqd) |
| 236 | { |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 237 | struct pblk_rec_ctx *recovery; |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 238 | |
Kent Overstreet | b906bbb | 2018-05-20 18:25:50 -0400 | [diff] [blame] | 239 | recovery = mempool_alloc(&pblk->rec_pool, GFP_ATOMIC); |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 240 | if (!recovery) { |
Matias Bjørling | 4e495a4 | 2018-07-13 10:48:42 +0200 | [diff] [blame] | 241 | pblk_err(pblk, "could not allocate recovery work\n"); |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 242 | return; |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 243 | } |
| 244 | |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 245 | recovery->pblk = pblk; |
| 246 | recovery->rqd = rqd; |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 247 | |
| 248 | INIT_WORK(&recovery->ws_rec, pblk_submit_rec); |
Javier González | ef57649 | 2017-06-26 11:57:28 +0200 | [diff] [blame] | 249 | queue_work(pblk->close_wq, &recovery->ws_rec); |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 250 | } |
| 251 | |
| 252 | static void pblk_end_io_write(struct nvm_rq *rqd) |
| 253 | { |
| 254 | struct pblk *pblk = rqd->private; |
| 255 | struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd); |
| 256 | |
| 257 | if (rqd->error) { |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 258 | pblk_end_w_fail(pblk, rqd); |
| 259 | return; |
Hans Holmberg | 4c44abf | 2018-10-09 13:11:52 +0200 | [diff] [blame] | 260 | } else { |
| 261 | if (trace_pblk_chunk_state_enabled()) |
| 262 | pblk_check_chunk_state_update(pblk, rqd); |
Matias Bjørling | 880eda5 | 2018-07-13 10:48:37 +0200 | [diff] [blame] | 263 | #ifdef CONFIG_NVM_PBLK_DEBUG |
Christoph Hellwig | 4e4cbee | 2017-06-03 09:38:06 +0200 | [diff] [blame] | 264 | WARN_ONCE(rqd->bio->bi_status, "pblk: corrupted write error\n"); |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 265 | #endif |
Hans Holmberg | 4c44abf | 2018-10-09 13:11:52 +0200 | [diff] [blame] | 266 | } |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 267 | |
| 268 | pblk_complete_write(pblk, rqd, c_ctx); |
Javier González | 588726d3 | 2017-06-26 11:57:29 +0200 | [diff] [blame] | 269 | atomic_dec(&pblk->inflight_io); |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 270 | } |
| 271 | |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 272 | static void pblk_end_io_write_meta(struct nvm_rq *rqd) |
| 273 | { |
| 274 | struct pblk *pblk = rqd->private; |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 275 | struct pblk_g_ctx *m_ctx = nvm_rq_to_pdu(rqd); |
| 276 | struct pblk_line *line = m_ctx->private; |
| 277 | struct pblk_emeta *emeta = line->emeta; |
Hans Holmberg | d68a934 | 2018-10-09 13:11:46 +0200 | [diff] [blame] | 278 | struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd); |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 279 | int sync; |
| 280 | |
Matias Bjørling | 43241cf | 2018-10-09 13:11:51 +0200 | [diff] [blame] | 281 | pblk_up_chunk(pblk, ppa_list[0]); |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 282 | |
| 283 | if (rqd->error) { |
| 284 | pblk_log_write_err(pblk, rqd); |
Matias Bjørling | 4e495a4 | 2018-07-13 10:48:42 +0200 | [diff] [blame] | 285 | pblk_err(pblk, "metadata I/O failed. Line %d\n", line->id); |
Hans Holmberg | 48b8d20 | 2018-06-01 16:41:06 +0200 | [diff] [blame] | 286 | line->w_err_gc->has_write_err = 1; |
Hans Holmberg | 4c44abf | 2018-10-09 13:11:52 +0200 | [diff] [blame] | 287 | } else { |
| 288 | if (trace_pblk_chunk_state_enabled()) |
| 289 | pblk_check_chunk_state_update(pblk, rqd); |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 290 | } |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 291 | |
| 292 | sync = atomic_add_return(rqd->nr_ppas, &emeta->sync); |
| 293 | if (sync == emeta->nr_entries) |
Javier González | b84ae4a8 | 2017-10-13 14:46:07 +0200 | [diff] [blame] | 294 | pblk_gen_run_ws(pblk, line, NULL, pblk_line_close_ws, |
| 295 | GFP_ATOMIC, pblk->close_wq); |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 296 | |
Javier González | e2cddf2 | 2017-10-13 14:46:19 +0200 | [diff] [blame] | 297 | pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT); |
Javier González | 588726d3 | 2017-06-26 11:57:29 +0200 | [diff] [blame] | 298 | |
| 299 | atomic_dec(&pblk->inflight_io); |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 300 | } |
| 301 | |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 302 | static int pblk_alloc_w_rq(struct pblk *pblk, struct nvm_rq *rqd, |
Javier González | 45dcf29 | 2018-10-09 13:12:02 +0200 | [diff] [blame] | 303 | unsigned int nr_secs, nvm_end_io_fn(*end_io)) |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 304 | { |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 305 | /* Setup write request */ |
| 306 | rqd->opcode = NVM_OP_PWRITE; |
| 307 | rqd->nr_ppas = nr_secs; |
Matias Bjørling | d7b6801 | 2018-10-09 13:11:32 +0200 | [diff] [blame] | 308 | rqd->is_seq = 1; |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 309 | rqd->private = pblk; |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 310 | rqd->end_io = end_io; |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 311 | |
Javier González | 45dcf29 | 2018-10-09 13:12:02 +0200 | [diff] [blame] | 312 | return pblk_alloc_rqd_meta(pblk, rqd); |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 313 | } |
| 314 | |
| 315 | static int pblk_setup_w_rq(struct pblk *pblk, struct nvm_rq *rqd, |
Javier González | 1e82123 | 2017-10-13 14:46:25 +0200 | [diff] [blame] | 316 | struct ppa_addr *erase_ppa) |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 317 | { |
| 318 | struct pblk_line_meta *lm = &pblk->lm; |
Javier González | d624f37 | 2017-06-26 11:57:15 +0200 | [diff] [blame] | 319 | struct pblk_line *e_line = pblk_line_get_erase(pblk); |
Javier González | 1e82123 | 2017-10-13 14:46:25 +0200 | [diff] [blame] | 320 | struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd); |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 321 | unsigned int valid = c_ctx->nr_valid; |
| 322 | unsigned int padded = c_ctx->nr_padded; |
| 323 | unsigned int nr_secs = valid + padded; |
| 324 | unsigned long *lun_bitmap; |
Javier González | 1e82123 | 2017-10-13 14:46:25 +0200 | [diff] [blame] | 325 | int ret; |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 326 | |
| 327 | lun_bitmap = kzalloc(lm->lun_bitmap_len, GFP_KERNEL); |
Javier González | d624f37 | 2017-06-26 11:57:15 +0200 | [diff] [blame] | 328 | if (!lun_bitmap) |
| 329 | return -ENOMEM; |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 330 | c_ctx->lun_bitmap = lun_bitmap; |
| 331 | |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 332 | ret = pblk_alloc_w_rq(pblk, rqd, nr_secs, pblk_end_io_write); |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 333 | if (ret) { |
| 334 | kfree(lun_bitmap); |
Javier González | d624f37 | 2017-06-26 11:57:15 +0200 | [diff] [blame] | 335 | return ret; |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 336 | } |
| 337 | |
Javier González | 588726d3 | 2017-06-26 11:57:29 +0200 | [diff] [blame] | 338 | if (likely(!e_line || !atomic_read(&e_line->left_eblks))) |
Hans Holmberg | 525f7bb | 2018-12-11 20:16:12 +0100 | [diff] [blame] | 339 | ret = pblk_map_rq(pblk, rqd, c_ctx->sentry, lun_bitmap, |
| 340 | valid, 0); |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 341 | else |
Hans Holmberg | 525f7bb | 2018-12-11 20:16:12 +0100 | [diff] [blame] | 342 | ret = pblk_map_erase_rq(pblk, rqd, c_ctx->sentry, lun_bitmap, |
Javier González | d624f37 | 2017-06-26 11:57:15 +0200 | [diff] [blame] | 343 | valid, erase_ppa); |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 344 | |
Hans Holmberg | 525f7bb | 2018-12-11 20:16:12 +0100 | [diff] [blame] | 345 | return ret; |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 346 | } |
| 347 | |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 348 | static int pblk_calc_secs_to_sync(struct pblk *pblk, unsigned int secs_avail, |
| 349 | unsigned int secs_to_flush) |
| 350 | { |
| 351 | int secs_to_sync; |
| 352 | |
Igor Konopko | 55d8ec3 | 2018-12-11 20:16:26 +0100 | [diff] [blame] | 353 | secs_to_sync = pblk_calc_secs(pblk, secs_avail, secs_to_flush, true); |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 354 | |
Matias Bjørling | 880eda5 | 2018-07-13 10:48:37 +0200 | [diff] [blame] | 355 | #ifdef CONFIG_NVM_PBLK_DEBUG |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 356 | if ((!secs_to_sync && secs_to_flush) |
| 357 | || (secs_to_sync < 0) |
| 358 | || (secs_to_sync > secs_avail && !secs_to_flush)) { |
Matias Bjørling | 4e495a4 | 2018-07-13 10:48:42 +0200 | [diff] [blame] | 359 | pblk_err(pblk, "bad sector calculation (a:%d,s:%d,f:%d)\n", |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 360 | secs_avail, secs_to_sync, secs_to_flush); |
| 361 | } |
| 362 | #endif |
| 363 | |
| 364 | return secs_to_sync; |
| 365 | } |
| 366 | |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 367 | int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line) |
| 368 | { |
| 369 | struct nvm_tgt_dev *dev = pblk->dev; |
| 370 | struct nvm_geo *geo = &dev->geo; |
| 371 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
| 372 | struct pblk_line_meta *lm = &pblk->lm; |
| 373 | struct pblk_emeta *emeta = meta_line->emeta; |
Hans Holmberg | d68a934 | 2018-10-09 13:11:46 +0200 | [diff] [blame] | 374 | struct ppa_addr *ppa_list; |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 375 | struct pblk_g_ctx *m_ctx; |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 376 | struct nvm_rq *rqd; |
| 377 | void *data; |
| 378 | u64 paddr; |
| 379 | int rq_ppas = pblk->min_write_pgs; |
| 380 | int id = meta_line->id; |
| 381 | int rq_len; |
| 382 | int i, j; |
| 383 | int ret; |
| 384 | |
Javier González | e2cddf2 | 2017-10-13 14:46:19 +0200 | [diff] [blame] | 385 | rqd = pblk_alloc_rqd(pblk, PBLK_WRITE_INT); |
Javier González | 2942f50 | 2017-10-13 14:46:10 +0200 | [diff] [blame] | 386 | |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 387 | m_ctx = nvm_rq_to_pdu(rqd); |
| 388 | m_ctx->private = meta_line; |
| 389 | |
Javier González | e46f4e4 | 2018-03-30 00:05:10 +0200 | [diff] [blame] | 390 | rq_len = rq_ppas * geo->csecs; |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 391 | data = ((void *)emeta->buf) + emeta->mem; |
| 392 | |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 393 | ret = pblk_alloc_w_rq(pblk, rqd, rq_ppas, pblk_end_io_write_meta); |
| 394 | if (ret) |
Hans Holmberg | 48e5da72 | 2019-07-31 11:41:34 +0200 | [diff] [blame] | 395 | goto fail_free_rqd; |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 396 | |
Hans Holmberg | d68a934 | 2018-10-09 13:11:46 +0200 | [diff] [blame] | 397 | ppa_list = nvm_rq_to_ppa_list(rqd); |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 398 | for (i = 0; i < rqd->nr_ppas; ) { |
| 399 | spin_lock(&meta_line->lock); |
| 400 | paddr = __pblk_alloc_page(pblk, meta_line, rq_ppas); |
| 401 | spin_unlock(&meta_line->lock); |
| 402 | for (j = 0; j < rq_ppas; j++, i++, paddr++) |
Hans Holmberg | d68a934 | 2018-10-09 13:11:46 +0200 | [diff] [blame] | 403 | ppa_list[i] = addr_to_gen_ppa(pblk, paddr, id); |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 404 | } |
| 405 | |
Javier González | d8adaa3 | 2018-10-09 13:11:35 +0200 | [diff] [blame] | 406 | spin_lock(&l_mg->close_lock); |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 407 | emeta->mem += rq_len; |
Javier González | d8adaa3 | 2018-10-09 13:11:35 +0200 | [diff] [blame] | 408 | if (emeta->mem >= lm->emeta_len[0]) |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 409 | list_del(&meta_line->list); |
Javier González | d8adaa3 | 2018-10-09 13:11:35 +0200 | [diff] [blame] | 410 | spin_unlock(&l_mg->close_lock); |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 411 | |
Matias Bjørling | 43241cf | 2018-10-09 13:11:51 +0200 | [diff] [blame] | 412 | pblk_down_chunk(pblk, ppa_list[0]); |
Javier González | 3eaa11e | 2017-07-07 21:08:52 +0200 | [diff] [blame] | 413 | |
Hans Holmberg | 48e5da72 | 2019-07-31 11:41:34 +0200 | [diff] [blame] | 414 | ret = pblk_submit_io(pblk, rqd, data); |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 415 | if (ret) { |
Matias Bjørling | 4e495a4 | 2018-07-13 10:48:42 +0200 | [diff] [blame] | 416 | pblk_err(pblk, "emeta I/O submission failed: %d\n", ret); |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 417 | goto fail_rollback; |
| 418 | } |
| 419 | |
| 420 | return NVM_IO_OK; |
| 421 | |
| 422 | fail_rollback: |
Matias Bjørling | 43241cf | 2018-10-09 13:11:51 +0200 | [diff] [blame] | 423 | pblk_up_chunk(pblk, ppa_list[0]); |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 424 | spin_lock(&l_mg->close_lock); |
| 425 | pblk_dealloc_page(pblk, meta_line, rq_ppas); |
| 426 | list_add(&meta_line->list, &meta_line->list); |
| 427 | spin_unlock(&l_mg->close_lock); |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 428 | fail_free_rqd: |
Javier González | e2cddf2 | 2017-10-13 14:46:19 +0200 | [diff] [blame] | 429 | pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT); |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 430 | return ret; |
| 431 | } |
| 432 | |
Javier González | 1e82123 | 2017-10-13 14:46:25 +0200 | [diff] [blame] | 433 | static inline bool pblk_valid_meta_ppa(struct pblk *pblk, |
| 434 | struct pblk_line *meta_line, |
| 435 | struct nvm_rq *data_rqd) |
| 436 | { |
| 437 | struct nvm_tgt_dev *dev = pblk->dev; |
| 438 | struct nvm_geo *geo = &dev->geo; |
| 439 | struct pblk_c_ctx *data_c_ctx = nvm_rq_to_pdu(data_rqd); |
| 440 | struct pblk_line *data_line = pblk_line_get_data(pblk); |
| 441 | struct ppa_addr ppa, ppa_opt; |
| 442 | u64 paddr; |
| 443 | int pos_opt; |
| 444 | |
| 445 | /* Schedule a metadata I/O that is half the distance from the data I/O |
| 446 | * with regards to the number of LUNs forming the pblk instance. This |
| 447 | * balances LUN conflicts across every I/O. |
| 448 | * |
| 449 | * When the LUN configuration changes (e.g., due to GC), this distance |
| 450 | * can align, which would result on metadata and data I/Os colliding. In |
| 451 | * this case, modify the distance to not be optimal, but move the |
| 452 | * optimal in the right direction. |
| 453 | */ |
| 454 | paddr = pblk_lookup_page(pblk, meta_line); |
| 455 | ppa = addr_to_gen_ppa(pblk, paddr, 0); |
| 456 | ppa_opt = addr_to_gen_ppa(pblk, paddr + data_line->meta_distance, 0); |
| 457 | pos_opt = pblk_ppa_to_pos(geo, ppa_opt); |
| 458 | |
| 459 | if (test_bit(pos_opt, data_c_ctx->lun_bitmap) || |
| 460 | test_bit(pos_opt, data_line->blk_bitmap)) |
| 461 | return true; |
| 462 | |
| 463 | if (unlikely(pblk_ppa_comp(ppa_opt, ppa))) |
| 464 | data_line->meta_distance--; |
| 465 | |
| 466 | return false; |
| 467 | } |
| 468 | |
| 469 | static struct pblk_line *pblk_should_submit_meta_io(struct pblk *pblk, |
| 470 | struct nvm_rq *data_rqd) |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 471 | { |
| 472 | struct pblk_line_meta *lm = &pblk->lm; |
| 473 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
| 474 | struct pblk_line *meta_line; |
| 475 | |
| 476 | spin_lock(&l_mg->close_lock); |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 477 | if (list_empty(&l_mg->emeta_list)) { |
| 478 | spin_unlock(&l_mg->close_lock); |
Javier González | 1e82123 | 2017-10-13 14:46:25 +0200 | [diff] [blame] | 479 | return NULL; |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 480 | } |
| 481 | meta_line = list_first_entry(&l_mg->emeta_list, struct pblk_line, list); |
Javier González | d8adaa3 | 2018-10-09 13:11:35 +0200 | [diff] [blame] | 482 | if (meta_line->emeta->mem >= lm->emeta_len[0]) { |
| 483 | spin_unlock(&l_mg->close_lock); |
| 484 | return NULL; |
| 485 | } |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 486 | spin_unlock(&l_mg->close_lock); |
| 487 | |
Javier González | 1e82123 | 2017-10-13 14:46:25 +0200 | [diff] [blame] | 488 | if (!pblk_valid_meta_ppa(pblk, meta_line, data_rqd)) |
| 489 | return NULL; |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 490 | |
Javier González | 1e82123 | 2017-10-13 14:46:25 +0200 | [diff] [blame] | 491 | return meta_line; |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 492 | } |
| 493 | |
Javier González | d624f37 | 2017-06-26 11:57:15 +0200 | [diff] [blame] | 494 | static int pblk_submit_io_set(struct pblk *pblk, struct nvm_rq *rqd) |
| 495 | { |
Javier González | d624f37 | 2017-06-26 11:57:15 +0200 | [diff] [blame] | 496 | struct ppa_addr erase_ppa; |
Javier González | 1e82123 | 2017-10-13 14:46:25 +0200 | [diff] [blame] | 497 | struct pblk_line *meta_line; |
Javier González | d624f37 | 2017-06-26 11:57:15 +0200 | [diff] [blame] | 498 | int err; |
| 499 | |
Matias Bjørling | 26f76dc | 2018-01-05 14:15:59 +0100 | [diff] [blame] | 500 | pblk_ppa_set_empty(&erase_ppa); |
Javier González | d624f37 | 2017-06-26 11:57:15 +0200 | [diff] [blame] | 501 | |
| 502 | /* Assign lbas to ppas and populate request structure */ |
Javier González | 1e82123 | 2017-10-13 14:46:25 +0200 | [diff] [blame] | 503 | err = pblk_setup_w_rq(pblk, rqd, &erase_ppa); |
Javier González | d624f37 | 2017-06-26 11:57:15 +0200 | [diff] [blame] | 504 | if (err) { |
Matias Bjørling | 4e495a4 | 2018-07-13 10:48:42 +0200 | [diff] [blame] | 505 | pblk_err(pblk, "could not setup write request: %d\n", err); |
Javier González | d624f37 | 2017-06-26 11:57:15 +0200 | [diff] [blame] | 506 | return NVM_IO_ERR; |
| 507 | } |
| 508 | |
Javier González | 1e82123 | 2017-10-13 14:46:25 +0200 | [diff] [blame] | 509 | meta_line = pblk_should_submit_meta_io(pblk, rqd); |
Javier González | d624f37 | 2017-06-26 11:57:15 +0200 | [diff] [blame] | 510 | |
Javier González | 1e82123 | 2017-10-13 14:46:25 +0200 | [diff] [blame] | 511 | /* Submit data write for current data line */ |
Hans Holmberg | 48e5da72 | 2019-07-31 11:41:34 +0200 | [diff] [blame] | 512 | err = pblk_submit_io(pblk, rqd, NULL); |
Javier González | 1e82123 | 2017-10-13 14:46:25 +0200 | [diff] [blame] | 513 | if (err) { |
Matias Bjørling | 4e495a4 | 2018-07-13 10:48:42 +0200 | [diff] [blame] | 514 | pblk_err(pblk, "data I/O submission failed: %d\n", err); |
Javier González | 1e82123 | 2017-10-13 14:46:25 +0200 | [diff] [blame] | 515 | return NVM_IO_ERR; |
| 516 | } |
Javier González | d624f37 | 2017-06-26 11:57:15 +0200 | [diff] [blame] | 517 | |
Matias Bjørling | 26f76dc | 2018-01-05 14:15:59 +0100 | [diff] [blame] | 518 | if (!pblk_ppa_empty(erase_ppa)) { |
Javier González | 1e82123 | 2017-10-13 14:46:25 +0200 | [diff] [blame] | 519 | /* Submit erase for next data line */ |
Javier González | dd2a434 | 2017-06-26 11:57:17 +0200 | [diff] [blame] | 520 | if (pblk_blk_erase_async(pblk, erase_ppa)) { |
| 521 | struct pblk_line *e_line = pblk_line_get_erase(pblk); |
| 522 | struct nvm_tgt_dev *dev = pblk->dev; |
| 523 | struct nvm_geo *geo = &dev->geo; |
| 524 | int bit; |
| 525 | |
| 526 | atomic_inc(&e_line->left_eblks); |
| 527 | bit = pblk_ppa_to_pos(geo, erase_ppa); |
| 528 | WARN_ON(!test_and_clear_bit(bit, e_line->erase_bitmap)); |
| 529 | } |
Javier González | d624f37 | 2017-06-26 11:57:15 +0200 | [diff] [blame] | 530 | } |
| 531 | |
Javier González | 1e82123 | 2017-10-13 14:46:25 +0200 | [diff] [blame] | 532 | if (meta_line) { |
| 533 | /* Submit metadata write for previous data line */ |
| 534 | err = pblk_submit_meta_io(pblk, meta_line); |
| 535 | if (err) { |
Matias Bjørling | 4e495a4 | 2018-07-13 10:48:42 +0200 | [diff] [blame] | 536 | pblk_err(pblk, "metadata I/O submission failed: %d", |
| 537 | err); |
Javier González | 1e82123 | 2017-10-13 14:46:25 +0200 | [diff] [blame] | 538 | return NVM_IO_ERR; |
| 539 | } |
| 540 | } |
| 541 | |
Javier González | d624f37 | 2017-06-26 11:57:15 +0200 | [diff] [blame] | 542 | return NVM_IO_OK; |
| 543 | } |
| 544 | |
| 545 | static void pblk_free_write_rqd(struct pblk *pblk, struct nvm_rq *rqd) |
| 546 | { |
| 547 | struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd); |
| 548 | struct bio *bio = rqd->bio; |
| 549 | |
| 550 | if (c_ctx->nr_padded) |
Javier González | cd8ddbf | 2017-10-13 14:46:03 +0200 | [diff] [blame] | 551 | pblk_bio_free_pages(pblk, bio, c_ctx->nr_valid, |
| 552 | c_ctx->nr_padded); |
Javier González | d624f37 | 2017-06-26 11:57:15 +0200 | [diff] [blame] | 553 | } |
| 554 | |
Hans Holmberg | 525f7bb | 2018-12-11 20:16:12 +0100 | [diff] [blame] | 555 | static int pblk_submit_write(struct pblk *pblk, int *secs_left) |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 556 | { |
| 557 | struct bio *bio; |
| 558 | struct nvm_rq *rqd; |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 559 | unsigned int secs_avail, secs_to_sync, secs_to_com; |
Igor Konopko | 55d8ec3 | 2018-12-11 20:16:26 +0100 | [diff] [blame] | 560 | unsigned int secs_to_flush, packed_meta_pgs; |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 561 | unsigned long pos; |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 562 | unsigned int resubmit; |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 563 | |
Hans Holmberg | 525f7bb | 2018-12-11 20:16:12 +0100 | [diff] [blame] | 564 | *secs_left = 0; |
| 565 | |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 566 | spin_lock(&pblk->resubmit_lock); |
| 567 | resubmit = !list_empty(&pblk->resubmit_list); |
| 568 | spin_unlock(&pblk->resubmit_lock); |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 569 | |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 570 | /* Resubmit failed writes first */ |
| 571 | if (resubmit) { |
| 572 | struct pblk_c_ctx *r_ctx; |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 573 | |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 574 | spin_lock(&pblk->resubmit_lock); |
| 575 | r_ctx = list_first_entry(&pblk->resubmit_list, |
| 576 | struct pblk_c_ctx, list); |
| 577 | list_del(&r_ctx->list); |
| 578 | spin_unlock(&pblk->resubmit_lock); |
| 579 | |
| 580 | secs_avail = r_ctx->nr_valid; |
| 581 | pos = r_ctx->sentry; |
| 582 | |
| 583 | pblk_prepare_resubmit(pblk, pos, secs_avail); |
| 584 | secs_to_sync = pblk_calc_secs_to_sync(pblk, secs_avail, |
| 585 | secs_avail); |
| 586 | |
| 587 | kfree(r_ctx); |
| 588 | } else { |
| 589 | /* If there are no sectors in the cache, |
| 590 | * flushes (bios without data) will be cleared on |
| 591 | * the cache threads |
| 592 | */ |
| 593 | secs_avail = pblk_rb_read_count(&pblk->rwb); |
| 594 | if (!secs_avail) |
Hans Holmberg | 525f7bb | 2018-12-11 20:16:12 +0100 | [diff] [blame] | 595 | return 0; |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 596 | |
| 597 | secs_to_flush = pblk_rb_flush_point_count(&pblk->rwb); |
Igor Konopko | 55d8ec3 | 2018-12-11 20:16:26 +0100 | [diff] [blame] | 598 | if (!secs_to_flush && secs_avail < pblk->min_write_pgs_data) |
Hans Holmberg | 525f7bb | 2018-12-11 20:16:12 +0100 | [diff] [blame] | 599 | return 0; |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 600 | |
| 601 | secs_to_sync = pblk_calc_secs_to_sync(pblk, secs_avail, |
| 602 | secs_to_flush); |
| 603 | if (secs_to_sync > pblk->max_write_pgs) { |
Matias Bjørling | 4e495a4 | 2018-07-13 10:48:42 +0200 | [diff] [blame] | 604 | pblk_err(pblk, "bad buffer sync calculation\n"); |
Hans Holmberg | 525f7bb | 2018-12-11 20:16:12 +0100 | [diff] [blame] | 605 | return 0; |
Hans Holmberg | 6a3abf5 | 2018-06-01 16:41:05 +0200 | [diff] [blame] | 606 | } |
| 607 | |
| 608 | secs_to_com = (secs_to_sync > secs_avail) ? |
| 609 | secs_avail : secs_to_sync; |
| 610 | pos = pblk_rb_read_commit(&pblk->rwb, secs_to_com); |
Javier González | 875d94f | 2017-10-13 14:46:18 +0200 | [diff] [blame] | 611 | } |
| 612 | |
Igor Konopko | 55d8ec3 | 2018-12-11 20:16:26 +0100 | [diff] [blame] | 613 | packed_meta_pgs = (pblk->min_write_pgs - pblk->min_write_pgs_data); |
| 614 | bio = bio_alloc(GFP_KERNEL, secs_to_sync + packed_meta_pgs); |
Javier González | 2942f50 | 2017-10-13 14:46:10 +0200 | [diff] [blame] | 615 | |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 616 | bio->bi_iter.bi_sector = 0; /* internal bio */ |
| 617 | bio_set_op_attrs(bio, REQ_OP_WRITE, 0); |
Javier González | 2942f50 | 2017-10-13 14:46:10 +0200 | [diff] [blame] | 618 | |
Javier González | e2cddf2 | 2017-10-13 14:46:19 +0200 | [diff] [blame] | 619 | rqd = pblk_alloc_rqd(pblk, PBLK_WRITE); |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 620 | rqd->bio = bio; |
| 621 | |
Javier González | 875d94f | 2017-10-13 14:46:18 +0200 | [diff] [blame] | 622 | if (pblk_rb_read_to_bio(&pblk->rwb, rqd, pos, secs_to_sync, |
Javier González | d624f37 | 2017-06-26 11:57:15 +0200 | [diff] [blame] | 623 | secs_avail)) { |
Matias Bjørling | 4e495a4 | 2018-07-13 10:48:42 +0200 | [diff] [blame] | 624 | pblk_err(pblk, "corrupted write bio\n"); |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 625 | goto fail_put_bio; |
| 626 | } |
| 627 | |
Javier González | d624f37 | 2017-06-26 11:57:15 +0200 | [diff] [blame] | 628 | if (pblk_submit_io_set(pblk, rqd)) |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 629 | goto fail_free_bio; |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 630 | |
Matias Bjørling | 880eda5 | 2018-07-13 10:48:37 +0200 | [diff] [blame] | 631 | #ifdef CONFIG_NVM_PBLK_DEBUG |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 632 | atomic_long_add(secs_to_sync, &pblk->sub_writes); |
| 633 | #endif |
| 634 | |
Hans Holmberg | 525f7bb | 2018-12-11 20:16:12 +0100 | [diff] [blame] | 635 | *secs_left = 1; |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 636 | return 0; |
| 637 | |
| 638 | fail_free_bio: |
Javier González | d624f37 | 2017-06-26 11:57:15 +0200 | [diff] [blame] | 639 | pblk_free_write_rqd(pblk, rqd); |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 640 | fail_put_bio: |
| 641 | bio_put(bio); |
Javier González | e2cddf2 | 2017-10-13 14:46:19 +0200 | [diff] [blame] | 642 | pblk_free_rqd(pblk, rqd, PBLK_WRITE); |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 643 | |
Hans Holmberg | 525f7bb | 2018-12-11 20:16:12 +0100 | [diff] [blame] | 644 | return -EINTR; |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 645 | } |
| 646 | |
| 647 | int pblk_write_ts(void *data) |
| 648 | { |
| 649 | struct pblk *pblk = data; |
Hans Holmberg | 525f7bb | 2018-12-11 20:16:12 +0100 | [diff] [blame] | 650 | int secs_left; |
| 651 | int write_failure = 0; |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 652 | |
| 653 | while (!kthread_should_stop()) { |
Hans Holmberg | 525f7bb | 2018-12-11 20:16:12 +0100 | [diff] [blame] | 654 | if (!write_failure) { |
| 655 | write_failure = pblk_submit_write(pblk, &secs_left); |
| 656 | |
| 657 | if (secs_left) |
| 658 | continue; |
| 659 | } |
Javier González | a4bd217 | 2017-04-15 20:55:50 +0200 | [diff] [blame] | 660 | set_current_state(TASK_INTERRUPTIBLE); |
| 661 | io_schedule(); |
| 662 | } |
| 663 | |
| 664 | return 0; |
| 665 | } |