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Javier González02a15202018-10-09 13:12:06 +02001// SPDX-License-Identifier: GPL-2.0
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02002/*
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-core.c - pblk's core functionality
17 *
18 */
19
Hans Holmberg4c44abf2018-10-09 13:11:52 +020020#define CREATE_TRACE_POINTS
21
Javier Gonzáleza4bd2172017-04-15 20:55:50 +020022#include "pblk.h"
Hans Holmberg4c44abf2018-10-09 13:11:52 +020023#include "pblk-trace.h"
Javier Gonzáleza4bd2172017-04-15 20:55:50 +020024
Javier González8bd40022017-10-13 14:46:44 +020025static void pblk_line_mark_bb(struct work_struct *work)
26{
27 struct pblk_line_ws *line_ws = container_of(work, struct pblk_line_ws,
28 ws);
29 struct pblk *pblk = line_ws->pblk;
30 struct nvm_tgt_dev *dev = pblk->dev;
31 struct ppa_addr *ppa = line_ws->priv;
32 int ret;
33
Matias Bjørlingaff3fb12018-10-09 13:11:36 +020034 ret = nvm_set_chunk_meta(dev, ppa, 1, NVM_BLK_T_GRWN_BAD);
Javier González8bd40022017-10-13 14:46:44 +020035 if (ret) {
36 struct pblk_line *line;
37 int pos;
38
Javier Gonzálezcb216652018-10-09 13:11:42 +020039 line = pblk_ppa_to_line(pblk, *ppa);
Javier Gonzálezb1bcfda2018-01-05 14:16:06 +010040 pos = pblk_ppa_to_pos(&dev->geo, *ppa);
Javier González8bd40022017-10-13 14:46:44 +020041
Matias Bjørling4e495a42018-07-13 10:48:42 +020042 pblk_err(pblk, "failed to mark bb, line:%d, pos:%d\n",
Javier González8bd40022017-10-13 14:46:44 +020043 line->id, pos);
44 }
45
46 kfree(ppa);
Kent Overstreetb906bbb2018-05-20 18:25:50 -040047 mempool_free(line_ws, &pblk->gen_ws_pool);
Javier González8bd40022017-10-13 14:46:44 +020048}
49
Javier Gonzáleza4bd2172017-04-15 20:55:50 +020050static void pblk_mark_bb(struct pblk *pblk, struct pblk_line *line,
Javier González32ef9412018-03-30 00:05:20 +020051 struct ppa_addr ppa_addr)
Javier Gonzáleza4bd2172017-04-15 20:55:50 +020052{
53 struct nvm_tgt_dev *dev = pblk->dev;
54 struct nvm_geo *geo = &dev->geo;
Javier González32ef9412018-03-30 00:05:20 +020055 struct ppa_addr *ppa;
56 int pos = pblk_ppa_to_pos(geo, ppa_addr);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +020057
Matias Bjørling4e495a42018-07-13 10:48:42 +020058 pblk_debug(pblk, "erase failed: line:%d, pos:%d\n", line->id, pos);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +020059 atomic_long_inc(&pblk->erase_failed);
60
Javier Gonzáleza44f53f2017-04-22 01:32:49 +020061 atomic_dec(&line->blk_in_line);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +020062 if (test_and_set_bit(pos, line->blk_bitmap))
Matias Bjørling4e495a42018-07-13 10:48:42 +020063 pblk_err(pblk, "attempted to erase bb: line:%d, pos:%d\n",
Javier Gonzáleza4bd2172017-04-15 20:55:50 +020064 line->id, pos);
65
Javier González32ef9412018-03-30 00:05:20 +020066 /* Not necessary to mark bad blocks on 2.0 spec. */
67 if (geo->version == NVM_OCSSD_SPEC_20)
68 return;
69
70 ppa = kmalloc(sizeof(struct ppa_addr), GFP_ATOMIC);
71 if (!ppa)
72 return;
73
74 *ppa = ppa_addr;
Javier Gonzálezb84ae4a82017-10-13 14:46:07 +020075 pblk_gen_run_ws(pblk, NULL, ppa, pblk_line_mark_bb,
76 GFP_ATOMIC, pblk->bb_wq);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +020077}
78
79static void __pblk_end_io_erase(struct pblk *pblk, struct nvm_rq *rqd)
80{
Javier González32ef9412018-03-30 00:05:20 +020081 struct nvm_tgt_dev *dev = pblk->dev;
82 struct nvm_geo *geo = &dev->geo;
83 struct nvm_chk_meta *chunk;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +020084 struct pblk_line *line;
Javier González32ef9412018-03-30 00:05:20 +020085 int pos;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +020086
Javier Gonzálezcb216652018-10-09 13:11:42 +020087 line = pblk_ppa_to_line(pblk, rqd->ppa_addr);
Javier González32ef9412018-03-30 00:05:20 +020088 pos = pblk_ppa_to_pos(geo, rqd->ppa_addr);
89 chunk = &line->chks[pos];
90
Javier Gonzáleza4bd2172017-04-15 20:55:50 +020091 atomic_dec(&line->left_seblks);
92
93 if (rqd->error) {
Hans Holmberg4209c312018-10-09 13:11:55 +020094 trace_pblk_chunk_reset(pblk_disk_name(pblk),
95 &rqd->ppa_addr, PBLK_CHUNK_RESET_FAILED);
96
Javier González32ef9412018-03-30 00:05:20 +020097 chunk->state = NVM_CHK_ST_OFFLINE;
98 pblk_mark_bb(pblk, line, rqd->ppa_addr);
99 } else {
Hans Holmberg4209c312018-10-09 13:11:55 +0200100 trace_pblk_chunk_reset(pblk_disk_name(pblk),
101 &rqd->ppa_addr, PBLK_CHUNK_RESET_DONE);
102
Javier González32ef9412018-03-30 00:05:20 +0200103 chunk->state = NVM_CHK_ST_FREE;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200104 }
Javier González588726d32017-06-26 11:57:29 +0200105
Hans Holmberg4c44abf2018-10-09 13:11:52 +0200106 trace_pblk_chunk_state(pblk_disk_name(pblk), &rqd->ppa_addr,
107 chunk->state);
108
Javier González588726d32017-06-26 11:57:29 +0200109 atomic_dec(&pblk->inflight_io);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200110}
111
112/* Erase completion assumes that only one block is erased at the time */
113static void pblk_end_io_erase(struct nvm_rq *rqd)
114{
115 struct pblk *pblk = rqd->private;
116
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200117 __pblk_end_io_erase(pblk, rqd);
Kent Overstreetb906bbb2018-05-20 18:25:50 -0400118 mempool_free(rqd, &pblk->e_rq_pool);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200119}
120
Javier González32ef9412018-03-30 00:05:20 +0200121/*
122 * Get information for all chunks from the device.
123 *
Javier González090ee262018-10-09 13:12:01 +0200124 * The caller is responsible for freeing (vmalloc) the returned structure
Javier González32ef9412018-03-30 00:05:20 +0200125 */
Matias Bjørlingaff3fb12018-10-09 13:11:36 +0200126struct nvm_chk_meta *pblk_get_chunk_meta(struct pblk *pblk)
Javier González32ef9412018-03-30 00:05:20 +0200127{
128 struct nvm_tgt_dev *dev = pblk->dev;
129 struct nvm_geo *geo = &dev->geo;
130 struct nvm_chk_meta *meta;
131 struct ppa_addr ppa;
132 unsigned long len;
133 int ret;
134
135 ppa.ppa = 0;
136
137 len = geo->all_chunks * sizeof(*meta);
Javier González090ee262018-10-09 13:12:01 +0200138 meta = vzalloc(len);
Javier González32ef9412018-03-30 00:05:20 +0200139 if (!meta)
140 return ERR_PTR(-ENOMEM);
141
Matias Bjørlingaff3fb12018-10-09 13:11:36 +0200142 ret = nvm_get_chunk_meta(dev, ppa, geo->all_chunks, meta);
Javier González32ef9412018-03-30 00:05:20 +0200143 if (ret) {
Hans Holmberg6916cf52019-02-11 13:25:03 +0100144 vfree(meta);
Javier González32ef9412018-03-30 00:05:20 +0200145 return ERR_PTR(-EIO);
146 }
147
148 return meta;
149}
150
151struct nvm_chk_meta *pblk_chunk_get_off(struct pblk *pblk,
152 struct nvm_chk_meta *meta,
153 struct ppa_addr ppa)
154{
155 struct nvm_tgt_dev *dev = pblk->dev;
156 struct nvm_geo *geo = &dev->geo;
157 int ch_off = ppa.m.grp * geo->num_chk * geo->num_lun;
158 int lun_off = ppa.m.pu * geo->num_chk;
159 int chk_off = ppa.m.chk;
160
161 return meta + ch_off + lun_off + chk_off;
162}
163
Javier González0880a9a2017-06-26 11:57:19 +0200164void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line,
165 u64 paddr)
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200166{
167 struct pblk_line_mgmt *l_mg = &pblk->l_mg;
168 struct list_head *move_list = NULL;
169
170 /* Lines being reclaimed (GC'ed) cannot be invalidated. Before the L2P
171 * table is modified with reclaimed sectors, a check is done to endure
172 * that newer updates are not overwritten.
173 */
174 spin_lock(&line->lock);
Javier Gonzálezd3401212017-10-13 14:46:14 +0200175 WARN_ON(line->state == PBLK_LINESTATE_FREE);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200176
177 if (test_and_set_bit(paddr, line->invalid_bitmap)) {
178 WARN_ONCE(1, "pblk: double invalidate\n");
179 spin_unlock(&line->lock);
180 return;
181 }
Javier Gonzálezdd2a4342017-06-26 11:57:17 +0200182 le32_add_cpu(line->vsc, -1);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200183
184 if (line->state == PBLK_LINESTATE_CLOSED)
185 move_list = pblk_line_gc_list(pblk, line);
186 spin_unlock(&line->lock);
187
188 if (move_list) {
189 spin_lock(&l_mg->gc_lock);
190 spin_lock(&line->lock);
191 /* Prevent moving a line that has just been chosen for GC */
Javier Gonzálezd3401212017-10-13 14:46:14 +0200192 if (line->state == PBLK_LINESTATE_GC) {
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200193 spin_unlock(&line->lock);
194 spin_unlock(&l_mg->gc_lock);
195 return;
196 }
197 spin_unlock(&line->lock);
198
199 list_move_tail(&line->list, move_list);
200 spin_unlock(&l_mg->gc_lock);
201 }
202}
203
204void pblk_map_invalidate(struct pblk *pblk, struct ppa_addr ppa)
205{
206 struct pblk_line *line;
207 u64 paddr;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200208
Matias Bjørling880eda52018-07-13 10:48:37 +0200209#ifdef CONFIG_NVM_PBLK_DEBUG
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200210 /* Callers must ensure that the ppa points to a device address */
211 BUG_ON(pblk_addr_in_cache(ppa));
212 BUG_ON(pblk_ppa_empty(ppa));
213#endif
214
Javier Gonzálezcb216652018-10-09 13:11:42 +0200215 line = pblk_ppa_to_line(pblk, ppa);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200216 paddr = pblk_dev_ppa_to_line_addr(pblk, ppa);
217
218 __pblk_map_invalidate(pblk, line, paddr);
219}
220
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200221static void pblk_invalidate_range(struct pblk *pblk, sector_t slba,
222 unsigned int nr_secs)
223{
224 sector_t lba;
225
226 spin_lock(&pblk->trans_lock);
227 for (lba = slba; lba < slba + nr_secs; lba++) {
228 struct ppa_addr ppa;
229
230 ppa = pblk_trans_map_get(pblk, lba);
231
232 if (!pblk_addr_in_cache(ppa) && !pblk_ppa_empty(ppa))
233 pblk_map_invalidate(pblk, ppa);
234
235 pblk_ppa_set_empty(&ppa);
236 pblk_trans_map_set(pblk, lba, ppa);
237 }
238 spin_unlock(&pblk->trans_lock);
239}
240
Javier González45dcf292018-10-09 13:12:02 +0200241int pblk_alloc_rqd_meta(struct pblk *pblk, struct nvm_rq *rqd)
242{
243 struct nvm_tgt_dev *dev = pblk->dev;
244
245 rqd->meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL,
246 &rqd->dma_meta_list);
247 if (!rqd->meta_list)
248 return -ENOMEM;
249
250 if (rqd->nr_ppas == 1)
251 return 0;
252
Igor Konopko24828d02018-12-11 20:16:24 +0100253 rqd->ppa_list = rqd->meta_list + pblk_dma_meta_size(pblk);
254 rqd->dma_ppa_list = rqd->dma_meta_list + pblk_dma_meta_size(pblk);
Javier González45dcf292018-10-09 13:12:02 +0200255
256 return 0;
257}
258
259void pblk_free_rqd_meta(struct pblk *pblk, struct nvm_rq *rqd)
260{
261 struct nvm_tgt_dev *dev = pblk->dev;
262
263 if (rqd->meta_list)
264 nvm_dev_dma_free(dev->parent, rqd->meta_list,
265 rqd->dma_meta_list);
266}
267
Javier González67bf26a2017-10-13 14:46:20 +0200268/* Caller must guarantee that the request is a valid type */
269struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int type)
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200270{
271 mempool_t *pool;
272 struct nvm_rq *rqd;
273 int rq_size;
274
Javier González67bf26a2017-10-13 14:46:20 +0200275 switch (type) {
276 case PBLK_WRITE:
277 case PBLK_WRITE_INT:
Kent Overstreetb906bbb2018-05-20 18:25:50 -0400278 pool = &pblk->w_rq_pool;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200279 rq_size = pblk_w_rq_size;
Javier González67bf26a2017-10-13 14:46:20 +0200280 break;
281 case PBLK_READ:
Kent Overstreetb906bbb2018-05-20 18:25:50 -0400282 pool = &pblk->r_rq_pool;
Javier González084ec9b2017-06-26 16:27:13 -0600283 rq_size = pblk_g_rq_size;
Javier González67bf26a2017-10-13 14:46:20 +0200284 break;
285 default:
Kent Overstreetb906bbb2018-05-20 18:25:50 -0400286 pool = &pblk->e_rq_pool;
Javier González67bf26a2017-10-13 14:46:20 +0200287 rq_size = pblk_g_rq_size;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200288 }
289
290 rqd = mempool_alloc(pool, GFP_KERNEL);
291 memset(rqd, 0, rq_size);
292
293 return rqd;
294}
295
Javier González67bf26a2017-10-13 14:46:20 +0200296/* Typically used on completion path. Cannot guarantee request consistency */
297void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int type)
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200298{
299 mempool_t *pool;
300
Javier González67bf26a2017-10-13 14:46:20 +0200301 switch (type) {
302 case PBLK_WRITE:
303 kfree(((struct pblk_c_ctx *)nvm_rq_to_pdu(rqd))->lun_bitmap);
Gustavo A. R. Silva884b0312018-07-13 10:48:43 +0200304 /* fall through */
Javier González67bf26a2017-10-13 14:46:20 +0200305 case PBLK_WRITE_INT:
Kent Overstreetb906bbb2018-05-20 18:25:50 -0400306 pool = &pblk->w_rq_pool;
Javier González67bf26a2017-10-13 14:46:20 +0200307 break;
308 case PBLK_READ:
Kent Overstreetb906bbb2018-05-20 18:25:50 -0400309 pool = &pblk->r_rq_pool;
Javier González67bf26a2017-10-13 14:46:20 +0200310 break;
311 case PBLK_ERASE:
Kent Overstreetb906bbb2018-05-20 18:25:50 -0400312 pool = &pblk->e_rq_pool;
Javier González67bf26a2017-10-13 14:46:20 +0200313 break;
314 default:
Matias Bjørling4e495a42018-07-13 10:48:42 +0200315 pblk_err(pblk, "trying to free unknown rqd type\n");
Javier González67bf26a2017-10-13 14:46:20 +0200316 return;
317 }
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200318
Javier González45dcf292018-10-09 13:12:02 +0200319 pblk_free_rqd_meta(pblk, rqd);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200320 mempool_free(rqd, pool);
321}
322
323void pblk_bio_free_pages(struct pblk *pblk, struct bio *bio, int off,
324 int nr_pages)
325{
Heiner Litz510fd8e2019-06-21 11:11:59 +0200326 struct bio_vec *bv;
327 struct page *page;
328 int i, e, nbv = 0;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200329
Heiner Litz510fd8e2019-06-21 11:11:59 +0200330 for (i = 0; i < bio->bi_vcnt; i++) {
331 bv = &bio->bi_io_vec[i];
332 page = bv->bv_page;
333 for (e = 0; e < bv->bv_len; e += PBLK_EXPOSED_PAGE_SIZE, nbv++)
334 if (nbv >= off)
335 mempool_free(page++, &pblk->page_bio_pool);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200336 }
337}
338
339int pblk_bio_add_pages(struct pblk *pblk, struct bio *bio, gfp_t flags,
340 int nr_pages)
341{
342 struct request_queue *q = pblk->dev->q;
343 struct page *page;
344 int i, ret;
345
346 for (i = 0; i < nr_pages; i++) {
Kent Overstreetb906bbb2018-05-20 18:25:50 -0400347 page = mempool_alloc(&pblk->page_bio_pool, flags);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200348
349 ret = bio_add_pc_page(q, bio, page, PBLK_EXPOSED_PAGE_SIZE, 0);
350 if (ret != PBLK_EXPOSED_PAGE_SIZE) {
Matias Bjørling4e495a42018-07-13 10:48:42 +0200351 pblk_err(pblk, "could not add page to bio\n");
Kent Overstreetb906bbb2018-05-20 18:25:50 -0400352 mempool_free(page, &pblk->page_bio_pool);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200353 goto err;
354 }
355 }
356
357 return 0;
358err:
Igor Konopkof142ac02018-06-01 16:41:08 +0200359 pblk_bio_free_pages(pblk, bio, (bio->bi_vcnt - i), i);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200360 return -1;
361}
362
Hans Holmbergcc9c9a02018-06-01 16:41:13 +0200363void pblk_write_kick(struct pblk *pblk)
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200364{
365 wake_up_process(pblk->writer_ts);
366 mod_timer(&pblk->wtimer, jiffies + msecs_to_jiffies(1000));
367}
368
Kees Cook87c1d2d2017-10-17 21:10:19 -0700369void pblk_write_timer_fn(struct timer_list *t)
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200370{
Kees Cook87c1d2d2017-10-17 21:10:19 -0700371 struct pblk *pblk = from_timer(pblk, t, wtimer);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200372
373 /* kick the write thread every tick to flush outstanding data */
374 pblk_write_kick(pblk);
375}
376
377void pblk_write_should_kick(struct pblk *pblk)
378{
379 unsigned int secs_avail = pblk_rb_read_count(&pblk->rwb);
380
Igor Konopko55d8ec32018-12-11 20:16:26 +0100381 if (secs_avail >= pblk->min_write_pgs_data)
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200382 pblk_write_kick(pblk);
383}
384
Javier González8bd40022017-10-13 14:46:44 +0200385static void pblk_wait_for_meta(struct pblk *pblk)
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200386{
Javier González588726d32017-06-26 11:57:29 +0200387 do {
388 if (!atomic_read(&pblk->inflight_io))
389 break;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200390
Javier González588726d32017-06-26 11:57:29 +0200391 schedule();
392 } while (1);
393}
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200394
Javier González588726d32017-06-26 11:57:29 +0200395static void pblk_flush_writer(struct pblk *pblk)
396{
397 pblk_rb_flush(&pblk->rwb);
398 do {
Javier Gonzálezee8d5c12017-06-30 17:56:40 +0200399 if (!pblk_rb_sync_count(&pblk->rwb))
Javier González588726d32017-06-26 11:57:29 +0200400 break;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200401
Javier Gonzálezee8d5c12017-06-30 17:56:40 +0200402 pblk_write_kick(pblk);
Javier González588726d32017-06-26 11:57:29 +0200403 schedule();
404 } while (1);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200405}
406
407struct list_head *pblk_line_gc_list(struct pblk *pblk, struct pblk_line *line)
408{
409 struct pblk_line_meta *lm = &pblk->lm;
410 struct pblk_line_mgmt *l_mg = &pblk->l_mg;
411 struct list_head *move_list = NULL;
Igor Konopko55d8ec32018-12-11 20:16:26 +0100412 int packed_meta = (le32_to_cpu(*line->vsc) / pblk->min_write_pgs_data)
413 * (pblk->min_write_pgs - pblk->min_write_pgs_data);
414 int vsc = le32_to_cpu(*line->vsc) + packed_meta;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200415
Javier González476118c2017-06-26 11:57:26 +0200416 lockdep_assert_held(&line->lock);
417
Hans Holmberg48b8d202018-06-01 16:41:06 +0200418 if (line->w_err_gc->has_write_err) {
419 if (line->gc_group != PBLK_LINEGC_WERR) {
420 line->gc_group = PBLK_LINEGC_WERR;
421 move_list = &l_mg->gc_werr_list;
422 pblk_rl_werr_line_in(&pblk->rl);
423 }
424 } else if (!vsc) {
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200425 if (line->gc_group != PBLK_LINEGC_FULL) {
426 line->gc_group = PBLK_LINEGC_FULL;
427 move_list = &l_mg->gc_full_list;
428 }
Javier Gonzálezb20ba1b2017-06-26 11:57:27 +0200429 } else if (vsc < lm->high_thrs) {
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200430 if (line->gc_group != PBLK_LINEGC_HIGH) {
431 line->gc_group = PBLK_LINEGC_HIGH;
432 move_list = &l_mg->gc_high_list;
433 }
Javier Gonzálezb20ba1b2017-06-26 11:57:27 +0200434 } else if (vsc < lm->mid_thrs) {
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200435 if (line->gc_group != PBLK_LINEGC_MID) {
436 line->gc_group = PBLK_LINEGC_MID;
437 move_list = &l_mg->gc_mid_list;
438 }
Javier Gonzálezdd2a4342017-06-26 11:57:17 +0200439 } else if (vsc < line->sec_in_line) {
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200440 if (line->gc_group != PBLK_LINEGC_LOW) {
441 line->gc_group = PBLK_LINEGC_LOW;
442 move_list = &l_mg->gc_low_list;
443 }
Javier Gonzálezdd2a4342017-06-26 11:57:17 +0200444 } else if (vsc == line->sec_in_line) {
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200445 if (line->gc_group != PBLK_LINEGC_EMPTY) {
446 line->gc_group = PBLK_LINEGC_EMPTY;
447 move_list = &l_mg->gc_empty_list;
448 }
449 } else {
450 line->state = PBLK_LINESTATE_CORRUPT;
Hans Holmbergf2937232018-10-09 13:11:53 +0200451 trace_pblk_line_state(pblk_disk_name(pblk), line->id,
452 line->state);
453
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200454 line->gc_group = PBLK_LINEGC_NONE;
455 move_list = &l_mg->corrupt_list;
Matias Bjørling4e495a42018-07-13 10:48:42 +0200456 pblk_err(pblk, "corrupted vsc for line %d, vsc:%d (%d/%d/%d)\n",
Javier Gonzálezdd2a4342017-06-26 11:57:17 +0200457 line->id, vsc,
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200458 line->sec_in_line,
459 lm->high_thrs, lm->mid_thrs);
460 }
461
462 return move_list;
463}
464
465void pblk_discard(struct pblk *pblk, struct bio *bio)
466{
467 sector_t slba = pblk_get_lba(bio);
468 sector_t nr_secs = pblk_get_secs(bio);
469
470 pblk_invalidate_range(pblk, slba, nr_secs);
471}
472
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200473void pblk_log_write_err(struct pblk *pblk, struct nvm_rq *rqd)
474{
475 atomic_long_inc(&pblk->write_failed);
Matias Bjørling880eda52018-07-13 10:48:37 +0200476#ifdef CONFIG_NVM_PBLK_DEBUG
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200477 pblk_print_failed_rqd(pblk, rqd, rqd->error);
478#endif
479}
480
481void pblk_log_read_err(struct pblk *pblk, struct nvm_rq *rqd)
482{
483 /* Empty page read is not necessarily an error (e.g., L2P recovery) */
484 if (rqd->error == NVM_RSP_ERR_EMPTYPAGE) {
485 atomic_long_inc(&pblk->read_empty);
486 return;
487 }
488
489 switch (rqd->error) {
490 case NVM_RSP_WARN_HIGHECC:
491 atomic_long_inc(&pblk->read_high_ecc);
492 break;
493 case NVM_RSP_ERR_FAILECC:
494 case NVM_RSP_ERR_FAILCRC:
495 atomic_long_inc(&pblk->read_failed);
496 break;
497 default:
Matias Bjørling4e495a42018-07-13 10:48:42 +0200498 pblk_err(pblk, "unknown read error:%d\n", rqd->error);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200499 }
Matias Bjørling880eda52018-07-13 10:48:37 +0200500#ifdef CONFIG_NVM_PBLK_DEBUG
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200501 pblk_print_failed_rqd(pblk, rqd, rqd->error);
502#endif
503}
504
Javier Gonzálezc2e9f5d2017-06-26 11:57:14 +0200505void pblk_set_sec_per_write(struct pblk *pblk, int sec_per_write)
506{
507 pblk->sec_per_write = sec_per_write;
508}
509
Hans Holmberg48e5da722019-07-31 11:41:34 +0200510int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd, void *buf)
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200511{
512 struct nvm_tgt_dev *dev = pblk->dev;
513
Javier González588726d32017-06-26 11:57:29 +0200514 atomic_inc(&pblk->inflight_io);
515
Matias Bjørling880eda52018-07-13 10:48:37 +0200516#ifdef CONFIG_NVM_PBLK_DEBUG
Javier Gonzálezb6730dd42018-06-01 15:04:20 +0200517 if (pblk_check_io(pblk, rqd))
518 return NVM_IO_ERR;
519#endif
520
Hans Holmberg48e5da722019-07-31 11:41:34 +0200521 return nvm_submit_io(dev, rqd, buf);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200522}
523
Hans Holmberg4c44abf2018-10-09 13:11:52 +0200524void pblk_check_chunk_state_update(struct pblk *pblk, struct nvm_rq *rqd)
525{
526 struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
527
528 int i;
529
530 for (i = 0; i < rqd->nr_ppas; i++) {
531 struct ppa_addr *ppa = &ppa_list[i];
532 struct nvm_chk_meta *chunk = pblk_dev_ppa_to_chunk(pblk, *ppa);
533 u64 caddr = pblk_dev_ppa_to_chunk_addr(pblk, *ppa);
534
535 if (caddr == 0)
536 trace_pblk_chunk_state(pblk_disk_name(pblk),
537 ppa, NVM_CHK_ST_OPEN);
Hans Holmberg96076f72018-12-11 20:16:09 +0100538 else if (caddr == (chunk->cnlb - 1))
Hans Holmberg4c44abf2018-10-09 13:11:52 +0200539 trace_pblk_chunk_state(pblk_disk_name(pblk),
540 ppa, NVM_CHK_ST_CLOSED);
541 }
542}
543
Hans Holmberg48e5da722019-07-31 11:41:34 +0200544int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd, void *buf)
Javier González1a94b2d2017-10-13 14:46:47 +0200545{
546 struct nvm_tgt_dev *dev = pblk->dev;
Hans Holmberg4c44abf2018-10-09 13:11:52 +0200547 int ret;
Javier González1a94b2d2017-10-13 14:46:47 +0200548
Javier González1a94b2d2017-10-13 14:46:47 +0200549 atomic_inc(&pblk->inflight_io);
550
Matias Bjørling880eda52018-07-13 10:48:37 +0200551#ifdef CONFIG_NVM_PBLK_DEBUG
Javier Gonzálezb6730dd42018-06-01 15:04:20 +0200552 if (pblk_check_io(pblk, rqd))
553 return NVM_IO_ERR;
554#endif
555
Hans Holmberg48e5da722019-07-31 11:41:34 +0200556 ret = nvm_submit_io_sync(dev, rqd, buf);
Hans Holmberg4c44abf2018-10-09 13:11:52 +0200557
558 if (trace_pblk_chunk_state_enabled() && !ret &&
559 rqd->opcode == NVM_OP_PWRITE)
560 pblk_check_chunk_state_update(pblk, rqd);
561
562 return ret;
Javier González1a94b2d2017-10-13 14:46:47 +0200563}
564
Hans Holmberg48e5da722019-07-31 11:41:34 +0200565static int pblk_submit_io_sync_sem(struct pblk *pblk, struct nvm_rq *rqd,
566 void *buf)
Javier González253babc2018-10-09 13:12:04 +0200567{
Igor Konopko45c5fcb2019-05-04 20:38:11 +0200568 struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
Javier González253babc2018-10-09 13:12:04 +0200569 int ret;
570
Javier González253babc2018-10-09 13:12:04 +0200571 pblk_down_chunk(pblk, ppa_list[0]);
Hans Holmberg48e5da722019-07-31 11:41:34 +0200572 ret = pblk_submit_io_sync(pblk, rqd, buf);
Javier González253babc2018-10-09 13:12:04 +0200573 pblk_up_chunk(pblk, ppa_list[0]);
574
575 return ret;
576}
577
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200578int pblk_calc_secs(struct pblk *pblk, unsigned long secs_avail,
Igor Konopko55d8ec32018-12-11 20:16:26 +0100579 unsigned long secs_to_flush, bool skip_meta)
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200580{
Javier Gonzálezc2e9f5d2017-06-26 11:57:14 +0200581 int max = pblk->sec_per_write;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200582 int min = pblk->min_write_pgs;
583 int secs_to_sync = 0;
584
Igor Konopko55d8ec32018-12-11 20:16:26 +0100585 if (skip_meta && pblk->min_write_pgs_data != pblk->min_write_pgs)
586 min = max = pblk->min_write_pgs_data;
587
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200588 if (secs_avail >= max)
589 secs_to_sync = max;
590 else if (secs_avail >= min)
591 secs_to_sync = min * (secs_avail / min);
592 else if (secs_to_flush)
593 secs_to_sync = min;
594
595 return secs_to_sync;
596}
597
Javier Gonzálezdd2a4342017-06-26 11:57:17 +0200598void pblk_dealloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs)
599{
600 u64 addr;
601 int i;
602
Rakesh Pandite57903f2017-10-13 14:45:56 +0200603 spin_lock(&line->lock);
Javier Gonzálezdd2a4342017-06-26 11:57:17 +0200604 addr = find_next_zero_bit(line->map_bitmap,
605 pblk->lm.sec_per_line, line->cur_sec);
606 line->cur_sec = addr - nr_secs;
607
608 for (i = 0; i < nr_secs; i++, line->cur_sec--)
609 WARN_ON(!test_and_clear_bit(line->cur_sec, line->map_bitmap));
Rakesh Pandite57903f2017-10-13 14:45:56 +0200610 spin_unlock(&line->lock);
Javier Gonzálezdd2a4342017-06-26 11:57:17 +0200611}
612
613u64 __pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs)
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200614{
615 u64 addr;
616 int i;
617
Javier González476118c2017-06-26 11:57:26 +0200618 lockdep_assert_held(&line->lock);
619
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200620 /* logic error: ppa out-of-bounds. Prevent generating bad address */
621 if (line->cur_sec + nr_secs > pblk->lm.sec_per_line) {
622 WARN(1, "pblk: page allocation out of bounds\n");
623 nr_secs = pblk->lm.sec_per_line - line->cur_sec;
624 }
625
626 line->cur_sec = addr = find_next_zero_bit(line->map_bitmap,
627 pblk->lm.sec_per_line, line->cur_sec);
628 for (i = 0; i < nr_secs; i++, line->cur_sec++)
629 WARN_ON(test_and_set_bit(line->cur_sec, line->map_bitmap));
630
631 return addr;
632}
633
634u64 pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs)
635{
636 u64 addr;
637
638 /* Lock needed in case a write fails and a recovery needs to remap
639 * failed write buffer entries
640 */
641 spin_lock(&line->lock);
642 addr = __pblk_alloc_page(pblk, line, nr_secs);
643 line->left_msecs -= nr_secs;
644 WARN(line->left_msecs < 0, "pblk: page allocation out of bounds\n");
645 spin_unlock(&line->lock);
646
647 return addr;
648}
649
Javier Gonzálezdd2a4342017-06-26 11:57:17 +0200650u64 pblk_lookup_page(struct pblk *pblk, struct pblk_line *line)
651{
652 u64 paddr;
653
654 spin_lock(&line->lock);
655 paddr = find_next_zero_bit(line->map_bitmap,
656 pblk->lm.sec_per_line, line->cur_sec);
657 spin_unlock(&line->lock);
658
659 return paddr;
660}
661
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200662u64 pblk_line_smeta_start(struct pblk *pblk, struct pblk_line *line)
663{
664 struct nvm_tgt_dev *dev = pblk->dev;
665 struct nvm_geo *geo = &dev->geo;
666 struct pblk_line_meta *lm = &pblk->lm;
667 int bit;
668
669 /* This usually only happens on bad lines */
670 bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line);
671 if (bit >= lm->blk_per_line)
672 return -1;
673
674 return bit * geo->ws_opt;
675}
676
677int pblk_line_smeta_read(struct pblk *pblk, struct pblk_line *line)
678{
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200679 struct pblk_line_meta *lm = &pblk->lm;
Igor Konopko45c5fcb2019-05-04 20:38:11 +0200680 struct ppa_addr *ppa_list;
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200681 struct nvm_rq rqd;
682 u64 paddr = pblk_line_smeta_start(pblk, line);
683 int i, ret;
684
685 memset(&rqd, 0, sizeof(struct nvm_rq));
686
687 ret = pblk_alloc_rqd_meta(pblk, &rqd);
688 if (ret)
689 return ret;
690
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200691 rqd.opcode = NVM_OP_PREAD;
692 rqd.nr_ppas = lm->smeta_sec;
693 rqd.is_seq = 1;
Igor Konopko45c5fcb2019-05-04 20:38:11 +0200694 ppa_list = nvm_rq_to_ppa_list(&rqd);
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200695
696 for (i = 0; i < lm->smeta_sec; i++, paddr++)
Igor Konopko45c5fcb2019-05-04 20:38:11 +0200697 ppa_list[i] = addr_to_gen_ppa(pblk, paddr, line->id);
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200698
Hans Holmberg48e5da722019-07-31 11:41:34 +0200699 ret = pblk_submit_io_sync(pblk, &rqd, line->smeta);
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200700 if (ret) {
701 pblk_err(pblk, "smeta I/O submission failed: %d\n", ret);
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200702 goto clear_rqd;
703 }
704
705 atomic_dec(&pblk->inflight_io);
706
Igor Konopkod165a7a2019-05-04 20:38:02 +0200707 if (rqd.error && rqd.error != NVM_RSP_WARN_HIGHECC) {
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200708 pblk_log_read_err(pblk, &rqd);
Igor Konopkod165a7a2019-05-04 20:38:02 +0200709 ret = -EIO;
710 }
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200711
712clear_rqd:
713 pblk_free_rqd_meta(pblk, &rqd);
714 return ret;
715}
716
717static int pblk_line_smeta_write(struct pblk *pblk, struct pblk_line *line,
718 u64 paddr)
719{
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200720 struct pblk_line_meta *lm = &pblk->lm;
Igor Konopko45c5fcb2019-05-04 20:38:11 +0200721 struct ppa_addr *ppa_list;
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200722 struct nvm_rq rqd;
723 __le64 *lba_list = emeta_to_lbas(pblk, line->emeta->buf);
724 __le64 addr_empty = cpu_to_le64(ADDR_EMPTY);
725 int i, ret;
726
727 memset(&rqd, 0, sizeof(struct nvm_rq));
728
729 ret = pblk_alloc_rqd_meta(pblk, &rqd);
730 if (ret)
731 return ret;
732
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200733 rqd.opcode = NVM_OP_PWRITE;
734 rqd.nr_ppas = lm->smeta_sec;
735 rqd.is_seq = 1;
Igor Konopko45c5fcb2019-05-04 20:38:11 +0200736 ppa_list = nvm_rq_to_ppa_list(&rqd);
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200737
738 for (i = 0; i < lm->smeta_sec; i++, paddr++) {
Igor Konopkofaa79f22018-12-11 20:16:23 +0100739 struct pblk_sec_meta *meta = pblk_get_meta(pblk,
740 rqd.meta_list, i);
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200741
Igor Konopko45c5fcb2019-05-04 20:38:11 +0200742 ppa_list[i] = addr_to_gen_ppa(pblk, paddr, line->id);
Igor Konopkofaa79f22018-12-11 20:16:23 +0100743 meta->lba = lba_list[paddr] = addr_empty;
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200744 }
745
Hans Holmberg48e5da722019-07-31 11:41:34 +0200746 ret = pblk_submit_io_sync_sem(pblk, &rqd, line->smeta);
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200747 if (ret) {
748 pblk_err(pblk, "smeta I/O submission failed: %d\n", ret);
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200749 goto clear_rqd;
750 }
751
752 atomic_dec(&pblk->inflight_io);
753
754 if (rqd.error) {
755 pblk_log_write_err(pblk, &rqd);
756 ret = -EIO;
757 }
758
759clear_rqd:
760 pblk_free_rqd_meta(pblk, &rqd);
761 return ret;
762}
763
764int pblk_line_emeta_read(struct pblk *pblk, struct pblk_line *line,
765 void *emeta_buf)
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200766{
767 struct nvm_tgt_dev *dev = pblk->dev;
768 struct nvm_geo *geo = &dev->geo;
769 struct pblk_line_meta *lm = &pblk->lm;
Igor Konopko45c5fcb2019-05-04 20:38:11 +0200770 void *ppa_list_buf, *meta_list;
Igor Konopko45c5fcb2019-05-04 20:38:11 +0200771 struct ppa_addr *ppa_list;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200772 struct nvm_rq rqd;
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200773 u64 paddr = line->emeta_ssec;
Javier González63e38092017-06-26 11:57:24 +0200774 dma_addr_t dma_ppa_list, dma_meta_list;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200775 int min = pblk->min_write_pgs;
Javier Gonzálezdd2a4342017-06-26 11:57:17 +0200776 int left_ppas = lm->emeta_sec[0];
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200777 int line_id = line->id;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200778 int rq_ppas, rq_len;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200779 int i, j;
780 int ret;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200781
Javier González63e38092017-06-26 11:57:24 +0200782 meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL,
783 &dma_meta_list);
784 if (!meta_list)
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200785 return -ENOMEM;
786
Igor Konopko45c5fcb2019-05-04 20:38:11 +0200787 ppa_list_buf = meta_list + pblk_dma_meta_size(pblk);
Igor Konopko24828d02018-12-11 20:16:24 +0100788 dma_ppa_list = dma_meta_list + pblk_dma_meta_size(pblk);
Javier González63e38092017-06-26 11:57:24 +0200789
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200790next_rq:
791 memset(&rqd, 0, sizeof(struct nvm_rq));
792
Igor Konopko55d8ec32018-12-11 20:16:26 +0100793 rq_ppas = pblk_calc_secs(pblk, left_ppas, 0, false);
Javier Gonzáleze46f4e42018-03-30 00:05:10 +0200794 rq_len = rq_ppas * geo->csecs;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200795
Javier González63e38092017-06-26 11:57:24 +0200796 rqd.meta_list = meta_list;
Igor Konopko45c5fcb2019-05-04 20:38:11 +0200797 rqd.ppa_list = ppa_list_buf;
Javier González63e38092017-06-26 11:57:24 +0200798 rqd.dma_meta_list = dma_meta_list;
799 rqd.dma_ppa_list = dma_ppa_list;
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200800 rqd.opcode = NVM_OP_PREAD;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200801 rqd.nr_ppas = rq_ppas;
Igor Konopko45c5fcb2019-05-04 20:38:11 +0200802 ppa_list = nvm_rq_to_ppa_list(&rqd);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200803
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200804 for (i = 0; i < rqd.nr_ppas; ) {
805 struct ppa_addr ppa = addr_to_gen_ppa(pblk, paddr, line_id);
806 int pos = pblk_ppa_to_pos(geo, ppa);
Javier González63e38092017-06-26 11:57:24 +0200807
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200808 if (pblk_io_aligned(pblk, rq_ppas))
809 rqd.is_seq = 1;
Javier Gonzálezf9c10152017-06-26 11:57:20 +0200810
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200811 while (test_bit(pos, line->blk_bitmap)) {
812 paddr += min;
813 if (pblk_boundary_paddr_checks(pblk, paddr)) {
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200814 ret = -EINTR;
815 goto free_rqd_dma;
816 }
817
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200818 ppa = addr_to_gen_ppa(pblk, paddr, line_id);
819 pos = pblk_ppa_to_pos(geo, ppa);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200820 }
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200821
822 if (pblk_boundary_paddr_checks(pblk, paddr + min)) {
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200823 ret = -EINTR;
824 goto free_rqd_dma;
825 }
826
827 for (j = 0; j < min; j++, i++, paddr++)
Igor Konopko45c5fcb2019-05-04 20:38:11 +0200828 ppa_list[i] = addr_to_gen_ppa(pblk, paddr, line_id);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200829 }
830
Hans Holmberg48e5da722019-07-31 11:41:34 +0200831 ret = pblk_submit_io_sync(pblk, &rqd, emeta_buf);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200832 if (ret) {
Matias Bjørling4e495a42018-07-13 10:48:42 +0200833 pblk_err(pblk, "emeta I/O submission failed: %d\n", ret);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200834 goto free_rqd_dma;
835 }
836
Javier González588726d32017-06-26 11:57:29 +0200837 atomic_dec(&pblk->inflight_io);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200838
Igor Konopkod165a7a2019-05-04 20:38:02 +0200839 if (rqd.error && rqd.error != NVM_RSP_WARN_HIGHECC) {
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200840 pblk_log_read_err(pblk, &rqd);
Igor Konopkod165a7a2019-05-04 20:38:02 +0200841 ret = -EIO;
842 goto free_rqd_dma;
843 }
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200844
Javier Gonzálezdd2a4342017-06-26 11:57:17 +0200845 emeta_buf += rq_len;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200846 left_ppas -= rq_ppas;
847 if (left_ppas)
848 goto next_rq;
Javier Gonzálezaf3fac12018-10-09 13:12:03 +0200849
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200850free_rqd_dma:
Javier González63e38092017-06-26 11:57:24 +0200851 nvm_dev_dma_free(dev->parent, rqd.meta_list, rqd.dma_meta_list);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200852 return ret;
853}
854
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200855static void pblk_setup_e_rq(struct pblk *pblk, struct nvm_rq *rqd,
856 struct ppa_addr ppa)
857{
858 rqd->opcode = NVM_OP_ERASE;
859 rqd->ppa_addr = ppa;
860 rqd->nr_ppas = 1;
Matias Bjørlingd7b68012018-10-09 13:11:32 +0200861 rqd->is_seq = 1;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200862 rqd->bio = NULL;
863}
864
865static int pblk_blk_erase_sync(struct pblk *pblk, struct ppa_addr ppa)
866{
Matias Bjørling4b5d56e2018-10-09 13:11:33 +0200867 struct nvm_rq rqd = {NULL};
868 int ret;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200869
Hans Holmberg4209c312018-10-09 13:11:55 +0200870 trace_pblk_chunk_reset(pblk_disk_name(pblk), &ppa,
871 PBLK_CHUNK_RESET_START);
872
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200873 pblk_setup_e_rq(pblk, &rqd, ppa);
874
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200875 /* The write thread schedules erases so that it minimizes disturbances
876 * with writes. Thus, there is no need to take the LUN semaphore.
877 */
Hans Holmberg48e5da722019-07-31 11:41:34 +0200878 ret = pblk_submit_io_sync(pblk, &rqd, NULL);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200879 rqd.private = pblk;
880 __pblk_end_io_erase(pblk, &rqd);
881
Javier González588726d32017-06-26 11:57:29 +0200882 return ret;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200883}
884
885int pblk_line_erase(struct pblk *pblk, struct pblk_line *line)
886{
887 struct pblk_line_meta *lm = &pblk->lm;
888 struct ppa_addr ppa;
Javier González588726d32017-06-26 11:57:29 +0200889 int ret, bit = -1;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200890
Javier Gonzáleza44f53f2017-04-22 01:32:49 +0200891 /* Erase only good blocks, one at a time */
892 do {
893 spin_lock(&line->lock);
894 bit = find_next_zero_bit(line->erase_bitmap, lm->blk_per_line,
895 bit + 1);
896 if (bit >= lm->blk_per_line) {
897 spin_unlock(&line->lock);
898 break;
899 }
900
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200901 ppa = pblk->luns[bit].bppa; /* set ch and lun */
Javier González69471512018-03-30 00:05:15 +0200902 ppa.a.blk = line->id;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200903
Javier Gonzáleza44f53f2017-04-22 01:32:49 +0200904 atomic_dec(&line->left_eblks);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200905 WARN_ON(test_and_set_bit(bit, line->erase_bitmap));
Javier Gonzáleza44f53f2017-04-22 01:32:49 +0200906 spin_unlock(&line->lock);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200907
Javier González588726d32017-06-26 11:57:29 +0200908 ret = pblk_blk_erase_sync(pblk, ppa);
909 if (ret) {
Matias Bjørling4e495a42018-07-13 10:48:42 +0200910 pblk_err(pblk, "failed to erase line %d\n", line->id);
Javier González588726d32017-06-26 11:57:29 +0200911 return ret;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200912 }
Javier Gonzáleza44f53f2017-04-22 01:32:49 +0200913 } while (1);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200914
915 return 0;
916}
917
Javier Gonzálezdd2a4342017-06-26 11:57:17 +0200918static void pblk_line_setup_metadata(struct pblk_line *line,
919 struct pblk_line_mgmt *l_mg,
920 struct pblk_line_meta *lm)
921{
922 int meta_line;
923
Javier González588726d32017-06-26 11:57:29 +0200924 lockdep_assert_held(&l_mg->free_lock);
925
Javier Gonzálezdd2a4342017-06-26 11:57:17 +0200926retry_meta:
927 meta_line = find_first_zero_bit(&l_mg->meta_bitmap, PBLK_DATA_LINES);
928 if (meta_line == PBLK_DATA_LINES) {
929 spin_unlock(&l_mg->free_lock);
930 io_schedule();
931 spin_lock(&l_mg->free_lock);
932 goto retry_meta;
933 }
934
935 set_bit(meta_line, &l_mg->meta_bitmap);
936 line->meta_line = meta_line;
937
938 line->smeta = l_mg->sline_meta[meta_line];
939 line->emeta = l_mg->eline_meta[meta_line];
940
941 memset(line->smeta, 0, lm->smeta_len);
942 memset(line->emeta->buf, 0, lm->emeta_len[0]);
943
944 line->emeta->mem = 0;
945 atomic_set(&line->emeta->sync, 0);
946}
947
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200948/* For now lines are always assumed full lines. Thus, smeta former and current
949 * lun bitmaps are omitted.
950 */
Javier Gonzálezdd2a4342017-06-26 11:57:17 +0200951static int pblk_line_init_metadata(struct pblk *pblk, struct pblk_line *line,
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200952 struct pblk_line *cur)
953{
954 struct nvm_tgt_dev *dev = pblk->dev;
955 struct nvm_geo *geo = &dev->geo;
956 struct pblk_line_meta *lm = &pblk->lm;
957 struct pblk_line_mgmt *l_mg = &pblk->l_mg;
Javier Gonzálezdd2a4342017-06-26 11:57:17 +0200958 struct pblk_emeta *emeta = line->emeta;
959 struct line_emeta *emeta_buf = emeta->buf;
960 struct line_smeta *smeta_buf = (struct line_smeta *)line->smeta;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200961 int nr_blk_line;
962
963 /* After erasing the line, new bad blocks might appear and we risk
964 * having an invalid line
965 */
966 nr_blk_line = lm->blk_per_line -
967 bitmap_weight(line->blk_bitmap, lm->blk_per_line);
968 if (nr_blk_line < lm->min_blk_line) {
969 spin_lock(&l_mg->free_lock);
970 spin_lock(&line->lock);
971 line->state = PBLK_LINESTATE_BAD;
Hans Holmbergf2937232018-10-09 13:11:53 +0200972 trace_pblk_line_state(pblk_disk_name(pblk), line->id,
973 line->state);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200974 spin_unlock(&line->lock);
975
976 list_add_tail(&line->list, &l_mg->bad_list);
977 spin_unlock(&l_mg->free_lock);
978
Matias Bjørling4e495a42018-07-13 10:48:42 +0200979 pblk_debug(pblk, "line %d is bad\n", line->id);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200980
981 return 0;
982 }
983
984 /* Run-time metadata */
Javier Gonzálezdd2a4342017-06-26 11:57:17 +0200985 line->lun_bitmap = ((void *)(smeta_buf)) + sizeof(struct line_smeta);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200986
987 /* Mark LUNs allocated in this line (all for now) */
988 bitmap_set(line->lun_bitmap, 0, lm->lun_bitmap_len);
989
Javier Gonzálezdd2a4342017-06-26 11:57:17 +0200990 smeta_buf->header.identifier = cpu_to_le32(PBLK_MAGIC);
Andy Shevchenko7e0a0842019-02-11 13:25:05 +0100991 guid_copy((guid_t *)&smeta_buf->header.uuid, &pblk->instance_uuid);
Javier Gonzálezdd2a4342017-06-26 11:57:17 +0200992 smeta_buf->header.id = cpu_to_le32(line->id);
993 smeta_buf->header.type = cpu_to_le16(line->type);
Hans Holmbergd0ab0b12018-03-30 00:04:51 +0200994 smeta_buf->header.version_major = SMETA_VERSION_MAJOR;
995 smeta_buf->header.version_minor = SMETA_VERSION_MINOR;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +0200996
997 /* Start metadata */
Javier Gonzálezdd2a4342017-06-26 11:57:17 +0200998 smeta_buf->seq_nr = cpu_to_le64(line->seq_nr);
Matias Bjørlingfae7fae2018-01-05 14:16:03 +0100999 smeta_buf->window_wr_lun = cpu_to_le32(geo->all_luns);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001000
1001 /* Fill metadata among lines */
1002 if (cur) {
1003 memcpy(line->lun_bitmap, cur->lun_bitmap, lm->lun_bitmap_len);
Javier Gonzálezdd2a4342017-06-26 11:57:17 +02001004 smeta_buf->prev_id = cpu_to_le32(cur->id);
1005 cur->emeta->buf->next_id = cpu_to_le32(line->id);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001006 } else {
Javier Gonzálezdd2a4342017-06-26 11:57:17 +02001007 smeta_buf->prev_id = cpu_to_le32(PBLK_LINE_EMPTY);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001008 }
1009
1010 /* All smeta must be set at this point */
Javier Gonzálezdd2a4342017-06-26 11:57:17 +02001011 smeta_buf->header.crc = cpu_to_le32(
1012 pblk_calc_meta_header_crc(pblk, &smeta_buf->header));
1013 smeta_buf->crc = cpu_to_le32(pblk_calc_smeta_crc(pblk, smeta_buf));
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001014
1015 /* End metadata */
Javier Gonzálezdd2a4342017-06-26 11:57:17 +02001016 memcpy(&emeta_buf->header, &smeta_buf->header,
1017 sizeof(struct line_header));
Hans Holmbergd0ab0b12018-03-30 00:04:51 +02001018
1019 emeta_buf->header.version_major = EMETA_VERSION_MAJOR;
1020 emeta_buf->header.version_minor = EMETA_VERSION_MINOR;
1021 emeta_buf->header.crc = cpu_to_le32(
1022 pblk_calc_meta_header_crc(pblk, &emeta_buf->header));
1023
Javier Gonzálezdd2a4342017-06-26 11:57:17 +02001024 emeta_buf->seq_nr = cpu_to_le64(line->seq_nr);
1025 emeta_buf->nr_lbas = cpu_to_le64(line->sec_in_line);
1026 emeta_buf->nr_valid_lbas = cpu_to_le64(0);
1027 emeta_buf->next_id = cpu_to_le32(PBLK_LINE_EMPTY);
1028 emeta_buf->crc = cpu_to_le32(0);
1029 emeta_buf->prev_id = smeta_buf->prev_id;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001030
1031 return 1;
1032}
1033
Javier González9cfd5a92018-06-01 16:41:14 +02001034static int pblk_line_alloc_bitmaps(struct pblk *pblk, struct pblk_line *line)
1035{
1036 struct pblk_line_meta *lm = &pblk->lm;
Hans Holmberg53d82db2018-10-09 13:11:47 +02001037 struct pblk_line_mgmt *l_mg = &pblk->l_mg;
Javier González9cfd5a92018-06-01 16:41:14 +02001038
Hans Holmberg53d82db2018-10-09 13:11:47 +02001039 line->map_bitmap = mempool_alloc(l_mg->bitmap_pool, GFP_KERNEL);
Javier González9cfd5a92018-06-01 16:41:14 +02001040 if (!line->map_bitmap)
1041 return -ENOMEM;
1042
Hans Holmberg53d82db2018-10-09 13:11:47 +02001043 memset(line->map_bitmap, 0, lm->sec_bitmap_len);
1044
Javier González9cfd5a92018-06-01 16:41:14 +02001045 /* will be initialized using bb info from map_bitmap */
Hans Holmberg53d82db2018-10-09 13:11:47 +02001046 line->invalid_bitmap = mempool_alloc(l_mg->bitmap_pool, GFP_KERNEL);
Javier González9cfd5a92018-06-01 16:41:14 +02001047 if (!line->invalid_bitmap) {
Hans Holmberg53d82db2018-10-09 13:11:47 +02001048 mempool_free(line->map_bitmap, l_mg->bitmap_pool);
Javier González9cfd5a92018-06-01 16:41:14 +02001049 line->map_bitmap = NULL;
1050 return -ENOMEM;
1051 }
1052
1053 return 0;
1054}
1055
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001056/* For now lines are always assumed full lines. Thus, smeta former and current
1057 * lun bitmaps are omitted.
1058 */
1059static int pblk_line_init_bb(struct pblk *pblk, struct pblk_line *line,
1060 int init)
1061{
1062 struct nvm_tgt_dev *dev = pblk->dev;
1063 struct nvm_geo *geo = &dev->geo;
1064 struct pblk_line_meta *lm = &pblk->lm;
1065 struct pblk_line_mgmt *l_mg = &pblk->l_mg;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001066 u64 off;
1067 int bit = -1;
Hans Holmbergcfe1c9e2018-03-30 00:04:50 +02001068 int emeta_secs;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001069
1070 line->sec_in_line = lm->sec_per_line;
1071
1072 /* Capture bad block information on line mapping bitmaps */
1073 while ((bit = find_next_bit(line->blk_bitmap, lm->blk_per_line,
1074 bit + 1)) < lm->blk_per_line) {
Javier Gonzáleze46f4e42018-03-30 00:05:10 +02001075 off = bit * geo->ws_opt;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001076 bitmap_shift_left(l_mg->bb_aux, l_mg->bb_template, off,
1077 lm->sec_per_line);
1078 bitmap_or(line->map_bitmap, line->map_bitmap, l_mg->bb_aux,
1079 lm->sec_per_line);
Javier Gonzáleze46f4e42018-03-30 00:05:10 +02001080 line->sec_in_line -= geo->clba;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001081 }
1082
1083 /* Mark smeta metadata sectors as bad sectors */
1084 bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line);
Javier Gonzáleze46f4e42018-03-30 00:05:10 +02001085 off = bit * geo->ws_opt;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001086 bitmap_set(line->map_bitmap, off, lm->smeta_sec);
1087 line->sec_in_line -= lm->smeta_sec;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001088 line->cur_sec = off + lm->smeta_sec;
1089
Javier Gonzálezaf3fac12018-10-09 13:12:03 +02001090 if (init && pblk_line_smeta_write(pblk, line, off)) {
Matias Bjørling4e495a42018-07-13 10:48:42 +02001091 pblk_debug(pblk, "line smeta I/O failed. Retry\n");
Hans Holmberg6cf17a22018-06-01 16:41:07 +02001092 return 0;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001093 }
1094
1095 bitmap_copy(line->invalid_bitmap, line->map_bitmap, lm->sec_per_line);
1096
1097 /* Mark emeta metadata sectors as bad sectors. We need to consider bad
1098 * blocks to make sure that there are enough sectors to store emeta
1099 */
Hans Holmbergcfe1c9e2018-03-30 00:04:50 +02001100 emeta_secs = lm->emeta_sec[0];
1101 off = lm->sec_per_line;
1102 while (emeta_secs) {
Javier Gonzáleze46f4e42018-03-30 00:05:10 +02001103 off -= geo->ws_opt;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001104 if (!test_bit(off, line->invalid_bitmap)) {
Javier Gonzáleze46f4e42018-03-30 00:05:10 +02001105 bitmap_set(line->invalid_bitmap, off, geo->ws_opt);
1106 emeta_secs -= geo->ws_opt;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001107 }
1108 }
1109
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001110 line->emeta_ssec = off;
Hans Holmbergcfe1c9e2018-03-30 00:04:50 +02001111 line->sec_in_line -= lm->emeta_sec[0];
Javier Gonzálezdd2a4342017-06-26 11:57:17 +02001112 line->nr_valid_lbas = 0;
Javier González0880a9a2017-06-26 11:57:19 +02001113 line->left_msecs = line->sec_in_line;
Javier Gonzálezdd2a4342017-06-26 11:57:17 +02001114 *line->vsc = cpu_to_le32(line->sec_in_line);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001115
1116 if (lm->sec_per_line - line->sec_in_line !=
1117 bitmap_weight(line->invalid_bitmap, lm->sec_per_line)) {
1118 spin_lock(&line->lock);
1119 line->state = PBLK_LINESTATE_BAD;
Hans Holmbergf2937232018-10-09 13:11:53 +02001120 trace_pblk_line_state(pblk_disk_name(pblk), line->id,
1121 line->state);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001122 spin_unlock(&line->lock);
1123
1124 list_add_tail(&line->list, &l_mg->bad_list);
Matias Bjørling4e495a42018-07-13 10:48:42 +02001125 pblk_err(pblk, "unexpected line %d is bad\n", line->id);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001126
1127 return 0;
1128 }
1129
1130 return 1;
1131}
1132
Javier González32ef9412018-03-30 00:05:20 +02001133static int pblk_prepare_new_line(struct pblk *pblk, struct pblk_line *line)
1134{
1135 struct pblk_line_meta *lm = &pblk->lm;
1136 struct nvm_tgt_dev *dev = pblk->dev;
1137 struct nvm_geo *geo = &dev->geo;
1138 int blk_to_erase = atomic_read(&line->blk_in_line);
1139 int i;
1140
1141 for (i = 0; i < lm->blk_per_line; i++) {
1142 struct pblk_lun *rlun = &pblk->luns[i];
1143 int pos = pblk_ppa_to_pos(geo, rlun->bppa);
1144 int state = line->chks[pos].state;
1145
1146 /* Free chunks should not be erased */
1147 if (state & NVM_CHK_ST_FREE) {
1148 set_bit(pblk_ppa_to_pos(geo, rlun->bppa),
1149 line->erase_bitmap);
1150 blk_to_erase--;
1151 }
1152 }
1153
1154 return blk_to_erase;
1155}
1156
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001157static int pblk_line_prepare(struct pblk *pblk, struct pblk_line *line)
1158{
1159 struct pblk_line_meta *lm = &pblk->lm;
Javier González1d8b33e2018-06-01 15:04:16 +02001160 int blk_in_line = atomic_read(&line->blk_in_line);
Javier González9cfd5a92018-06-01 16:41:14 +02001161 int blk_to_erase;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001162
Javier González32ef9412018-03-30 00:05:20 +02001163 /* Bad blocks do not need to be erased */
1164 bitmap_copy(line->erase_bitmap, line->blk_bitmap, lm->blk_per_line);
1165
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001166 spin_lock(&line->lock);
Javier González32ef9412018-03-30 00:05:20 +02001167
1168 /* If we have not written to this line, we need to mark up free chunks
1169 * as already erased
1170 */
1171 if (line->state == PBLK_LINESTATE_NEW) {
1172 blk_to_erase = pblk_prepare_new_line(pblk, line);
1173 line->state = PBLK_LINESTATE_FREE;
Hans Holmbergf2937232018-10-09 13:11:53 +02001174 trace_pblk_line_state(pblk_disk_name(pblk), line->id,
1175 line->state);
Javier González32ef9412018-03-30 00:05:20 +02001176 } else {
Javier González1d8b33e2018-06-01 15:04:16 +02001177 blk_to_erase = blk_in_line;
1178 }
1179
1180 if (blk_in_line < lm->min_blk_line) {
Javier González9cfd5a92018-06-01 16:41:14 +02001181 spin_unlock(&line->lock);
1182 return -EAGAIN;
Javier González32ef9412018-03-30 00:05:20 +02001183 }
1184
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001185 if (line->state != PBLK_LINESTATE_FREE) {
Javier González588726d32017-06-26 11:57:29 +02001186 WARN(1, "pblk: corrupted line %d, state %d\n",
1187 line->id, line->state);
Javier González9cfd5a92018-06-01 16:41:14 +02001188 spin_unlock(&line->lock);
1189 return -EINTR;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001190 }
Javier González588726d32017-06-26 11:57:29 +02001191
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001192 line->state = PBLK_LINESTATE_OPEN;
Hans Holmbergf2937232018-10-09 13:11:53 +02001193 trace_pblk_line_state(pblk_disk_name(pblk), line->id,
1194 line->state);
Javier Gonzáleza44f53f2017-04-22 01:32:49 +02001195
Javier González32ef9412018-03-30 00:05:20 +02001196 atomic_set(&line->left_eblks, blk_to_erase);
1197 atomic_set(&line->left_seblks, blk_to_erase);
Javier Gonzálezdd2a4342017-06-26 11:57:17 +02001198
1199 line->meta_distance = lm->meta_distance;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001200 spin_unlock(&line->lock);
1201
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001202 kref_init(&line->ref);
Heiner Litz05869422019-02-11 13:25:09 +01001203 atomic_set(&line->sec_to_update, 0);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001204
1205 return 0;
1206}
1207
Javier González361d8892018-12-11 20:16:19 +01001208/* Line allocations in the recovery path are always single threaded */
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001209int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line)
1210{
1211 struct pblk_line_mgmt *l_mg = &pblk->l_mg;
1212 int ret;
1213
1214 spin_lock(&l_mg->free_lock);
1215 l_mg->data_line = line;
1216 list_del(&line->list);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001217
1218 ret = pblk_line_prepare(pblk, line);
1219 if (ret) {
1220 list_add(&line->list, &l_mg->free_list);
Javier González3dc001f2017-04-22 01:32:45 +02001221 spin_unlock(&l_mg->free_lock);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001222 return ret;
1223 }
Javier González3dc001f2017-04-22 01:32:45 +02001224 spin_unlock(&l_mg->free_lock);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001225
Javier González9cfd5a92018-06-01 16:41:14 +02001226 ret = pblk_line_alloc_bitmaps(pblk, line);
1227 if (ret)
Hua Sufde201a2018-12-11 20:16:18 +01001228 goto fail;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001229
1230 if (!pblk_line_init_bb(pblk, line, 0)) {
Hua Sufde201a2018-12-11 20:16:18 +01001231 ret = -EINTR;
1232 goto fail;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001233 }
1234
Javier González9cfd5a92018-06-01 16:41:14 +02001235 pblk_rl_free_lines_dec(&pblk->rl, line, true);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001236 return 0;
Hua Sufde201a2018-12-11 20:16:18 +01001237
1238fail:
1239 spin_lock(&l_mg->free_lock);
1240 list_add(&line->list, &l_mg->free_list);
1241 spin_unlock(&l_mg->free_lock);
1242
1243 return ret;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001244}
1245
1246void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line)
1247{
Hans Holmberg53d82db2018-10-09 13:11:47 +02001248 struct pblk_line_mgmt *l_mg = &pblk->l_mg;
1249
1250 mempool_free(line->map_bitmap, l_mg->bitmap_pool);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001251 line->map_bitmap = NULL;
1252 line->smeta = NULL;
1253 line->emeta = NULL;
1254}
1255
Javier González9cfd5a92018-06-01 16:41:14 +02001256static void pblk_line_reinit(struct pblk_line *line)
1257{
1258 *line->vsc = cpu_to_le32(EMPTY_ENTRY);
1259
1260 line->map_bitmap = NULL;
1261 line->invalid_bitmap = NULL;
1262 line->smeta = NULL;
1263 line->emeta = NULL;
1264}
1265
1266void pblk_line_free(struct pblk_line *line)
1267{
Hans Holmberg53d82db2018-10-09 13:11:47 +02001268 struct pblk *pblk = line->pblk;
1269 struct pblk_line_mgmt *l_mg = &pblk->l_mg;
1270
1271 mempool_free(line->map_bitmap, l_mg->bitmap_pool);
1272 mempool_free(line->invalid_bitmap, l_mg->bitmap_pool);
Javier González9cfd5a92018-06-01 16:41:14 +02001273
1274 pblk_line_reinit(line);
1275}
1276
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001277struct pblk_line *pblk_line_get(struct pblk *pblk)
1278{
1279 struct pblk_line_mgmt *l_mg = &pblk->l_mg;
1280 struct pblk_line_meta *lm = &pblk->lm;
Javier González588726d32017-06-26 11:57:29 +02001281 struct pblk_line *line;
1282 int ret, bit;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001283
1284 lockdep_assert_held(&l_mg->free_lock);
1285
Javier González588726d32017-06-26 11:57:29 +02001286retry:
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001287 if (list_empty(&l_mg->free_list)) {
Matias Bjørling4e495a42018-07-13 10:48:42 +02001288 pblk_err(pblk, "no free lines\n");
Javier González588726d32017-06-26 11:57:29 +02001289 return NULL;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001290 }
1291
1292 line = list_first_entry(&l_mg->free_list, struct pblk_line, list);
1293 list_del(&line->list);
1294 l_mg->nr_free_lines--;
1295
1296 bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line);
1297 if (unlikely(bit >= lm->blk_per_line)) {
1298 spin_lock(&line->lock);
1299 line->state = PBLK_LINESTATE_BAD;
Hans Holmbergf2937232018-10-09 13:11:53 +02001300 trace_pblk_line_state(pblk_disk_name(pblk), line->id,
1301 line->state);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001302 spin_unlock(&line->lock);
1303
1304 list_add_tail(&line->list, &l_mg->bad_list);
1305
Matias Bjørling4e495a42018-07-13 10:48:42 +02001306 pblk_debug(pblk, "line %d is bad\n", line->id);
Javier González588726d32017-06-26 11:57:29 +02001307 goto retry;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001308 }
1309
Javier González588726d32017-06-26 11:57:29 +02001310 ret = pblk_line_prepare(pblk, line);
1311 if (ret) {
Javier González1d8b33e2018-06-01 15:04:16 +02001312 switch (ret) {
1313 case -EAGAIN:
1314 list_add(&line->list, &l_mg->bad_list);
1315 goto retry;
1316 case -EINTR:
Javier González588726d32017-06-26 11:57:29 +02001317 list_add(&line->list, &l_mg->corrupt_list);
1318 goto retry;
Javier González1d8b33e2018-06-01 15:04:16 +02001319 default:
Matias Bjørling4e495a42018-07-13 10:48:42 +02001320 pblk_err(pblk, "failed to prepare line %d\n", line->id);
Javier González588726d32017-06-26 11:57:29 +02001321 list_add(&line->list, &l_mg->free_list);
1322 l_mg->nr_free_lines++;
1323 return NULL;
1324 }
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001325 }
1326
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001327 return line;
1328}
1329
1330static struct pblk_line *pblk_line_retry(struct pblk *pblk,
1331 struct pblk_line *line)
1332{
1333 struct pblk_line_mgmt *l_mg = &pblk->l_mg;
1334 struct pblk_line *retry_line;
1335
Javier González588726d32017-06-26 11:57:29 +02001336retry:
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001337 spin_lock(&l_mg->free_lock);
1338 retry_line = pblk_line_get(pblk);
1339 if (!retry_line) {
Javier Gonzálezbe388d92017-04-22 01:32:48 +02001340 l_mg->data_line = NULL;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001341 spin_unlock(&l_mg->free_lock);
1342 return NULL;
1343 }
1344
Javier González9cfd5a92018-06-01 16:41:14 +02001345 retry_line->map_bitmap = line->map_bitmap;
1346 retry_line->invalid_bitmap = line->invalid_bitmap;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001347 retry_line->smeta = line->smeta;
1348 retry_line->emeta = line->emeta;
1349 retry_line->meta_line = line->meta_line;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001350
Javier González9cfd5a92018-06-01 16:41:14 +02001351 pblk_line_reinit(line);
1352
Javier González3dc001f2017-04-22 01:32:45 +02001353 l_mg->data_line = retry_line;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001354 spin_unlock(&l_mg->free_lock);
1355
Javier Gonzáleza7689932018-01-05 14:16:13 +01001356 pblk_rl_free_lines_dec(&pblk->rl, line, false);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001357
Javier González588726d32017-06-26 11:57:29 +02001358 if (pblk_line_erase(pblk, retry_line))
1359 goto retry;
1360
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001361 return retry_line;
1362}
1363
Javier González588726d32017-06-26 11:57:29 +02001364static void pblk_set_space_limit(struct pblk *pblk)
1365{
1366 struct pblk_rl *rl = &pblk->rl;
1367
1368 atomic_set(&rl->rb_space, 0);
1369}
1370
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001371struct pblk_line *pblk_line_get_first_data(struct pblk *pblk)
1372{
1373 struct pblk_line_mgmt *l_mg = &pblk->l_mg;
1374 struct pblk_line *line;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001375
1376 spin_lock(&l_mg->free_lock);
1377 line = pblk_line_get(pblk);
1378 if (!line) {
1379 spin_unlock(&l_mg->free_lock);
1380 return NULL;
1381 }
1382
1383 line->seq_nr = l_mg->d_seq_nr++;
1384 line->type = PBLK_LINETYPE_DATA;
1385 l_mg->data_line = line;
1386
Javier Gonzálezdd2a4342017-06-26 11:57:17 +02001387 pblk_line_setup_metadata(line, l_mg, &pblk->lm);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001388
1389 /* Allocate next line for preparation */
1390 l_mg->data_next = pblk_line_get(pblk);
Javier González588726d32017-06-26 11:57:29 +02001391 if (!l_mg->data_next) {
1392 /* If we cannot get a new line, we need to stop the pipeline.
1393 * Only allow as many writes in as we can store safely and then
1394 * fail gracefully
1395 */
1396 pblk_set_space_limit(pblk);
1397
1398 l_mg->data_next = NULL;
1399 } else {
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001400 l_mg->data_next->seq_nr = l_mg->d_seq_nr++;
1401 l_mg->data_next->type = PBLK_LINETYPE_DATA;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001402 }
1403 spin_unlock(&l_mg->free_lock);
1404
Javier González9cfd5a92018-06-01 16:41:14 +02001405 if (pblk_line_alloc_bitmaps(pblk, line))
1406 return NULL;
1407
Javier González588726d32017-06-26 11:57:29 +02001408 if (pblk_line_erase(pblk, line)) {
1409 line = pblk_line_retry(pblk, line);
1410 if (!line)
1411 return NULL;
1412 }
1413
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001414retry_setup:
Javier Gonzálezdd2a4342017-06-26 11:57:17 +02001415 if (!pblk_line_init_metadata(pblk, line, NULL)) {
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001416 line = pblk_line_retry(pblk, line);
1417 if (!line)
1418 return NULL;
1419
1420 goto retry_setup;
1421 }
1422
1423 if (!pblk_line_init_bb(pblk, line, 1)) {
1424 line = pblk_line_retry(pblk, line);
1425 if (!line)
1426 return NULL;
1427
1428 goto retry_setup;
1429 }
1430
Javier Gonzáleza7689932018-01-05 14:16:13 +01001431 pblk_rl_free_lines_dec(&pblk->rl, line, true);
1432
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001433 return line;
1434}
1435
Matias Bjørlingae14cc02018-10-09 13:11:40 +02001436void pblk_ppa_to_line_put(struct pblk *pblk, struct ppa_addr ppa)
1437{
1438 struct pblk_line *line;
1439
Javier Gonzálezcb216652018-10-09 13:11:42 +02001440 line = pblk_ppa_to_line(pblk, ppa);
Matias Bjørlingae14cc02018-10-09 13:11:40 +02001441 kref_put(&line->ref, pblk_line_put_wq);
1442}
1443
1444void pblk_rq_to_line_put(struct pblk *pblk, struct nvm_rq *rqd)
1445{
Igor Konopko45c5fcb2019-05-04 20:38:11 +02001446 struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
Matias Bjørlingae14cc02018-10-09 13:11:40 +02001447 int i;
1448
Matias Bjørlingae14cc02018-10-09 13:11:40 +02001449 for (i = 0; i < rqd->nr_ppas; i++)
1450 pblk_ppa_to_line_put(pblk, ppa_list[i]);
1451}
1452
Javier González588726d32017-06-26 11:57:29 +02001453static void pblk_stop_writes(struct pblk *pblk, struct pblk_line *line)
1454{
1455 lockdep_assert_held(&pblk->l_mg.free_lock);
1456
1457 pblk_set_space_limit(pblk);
1458 pblk->state = PBLK_STATE_STOPPING;
Hans Holmberg1b0dd0b2018-10-09 13:11:54 +02001459 trace_pblk_state(pblk_disk_name(pblk), pblk->state);
Javier González588726d32017-06-26 11:57:29 +02001460}
1461
Javier González8bd40022017-10-13 14:46:44 +02001462static void pblk_line_close_meta_sync(struct pblk *pblk)
1463{
1464 struct pblk_line_mgmt *l_mg = &pblk->l_mg;
1465 struct pblk_line_meta *lm = &pblk->lm;
1466 struct pblk_line *line, *tline;
1467 LIST_HEAD(list);
1468
1469 spin_lock(&l_mg->close_lock);
1470 if (list_empty(&l_mg->emeta_list)) {
1471 spin_unlock(&l_mg->close_lock);
1472 return;
1473 }
1474
1475 list_cut_position(&list, &l_mg->emeta_list, l_mg->emeta_list.prev);
1476 spin_unlock(&l_mg->close_lock);
1477
1478 list_for_each_entry_safe(line, tline, &list, list) {
1479 struct pblk_emeta *emeta = line->emeta;
1480
1481 while (emeta->mem < lm->emeta_len[0]) {
1482 int ret;
1483
1484 ret = pblk_submit_meta_io(pblk, line);
1485 if (ret) {
Matias Bjørling4e495a42018-07-13 10:48:42 +02001486 pblk_err(pblk, "sync meta line %d failed (%d)\n",
Javier González8bd40022017-10-13 14:46:44 +02001487 line->id, ret);
1488 return;
1489 }
1490 }
1491 }
1492
1493 pblk_wait_for_meta(pblk);
1494 flush_workqueue(pblk->close_wq);
1495}
1496
Javier Gonzáleza7c9e912018-06-01 15:04:24 +02001497void __pblk_pipeline_flush(struct pblk *pblk)
Javier González588726d32017-06-26 11:57:29 +02001498{
1499 struct pblk_line_mgmt *l_mg = &pblk->l_mg;
1500 int ret;
1501
1502 spin_lock(&l_mg->free_lock);
1503 if (pblk->state == PBLK_STATE_RECOVERING ||
1504 pblk->state == PBLK_STATE_STOPPED) {
1505 spin_unlock(&l_mg->free_lock);
1506 return;
1507 }
1508 pblk->state = PBLK_STATE_RECOVERING;
Hans Holmberg1b0dd0b2018-10-09 13:11:54 +02001509 trace_pblk_state(pblk_disk_name(pblk), pblk->state);
Javier González588726d32017-06-26 11:57:29 +02001510 spin_unlock(&l_mg->free_lock);
1511
1512 pblk_flush_writer(pblk);
1513 pblk_wait_for_meta(pblk);
1514
1515 ret = pblk_recov_pad(pblk);
1516 if (ret) {
Matias Bjørling4e495a42018-07-13 10:48:42 +02001517 pblk_err(pblk, "could not close data on teardown(%d)\n", ret);
Javier González588726d32017-06-26 11:57:29 +02001518 return;
1519 }
1520
Javier Gonzálezee8d5c12017-06-30 17:56:40 +02001521 flush_workqueue(pblk->bb_wq);
Javier González588726d32017-06-26 11:57:29 +02001522 pblk_line_close_meta_sync(pblk);
Javier Gonzáleza7c9e912018-06-01 15:04:24 +02001523}
1524
1525void __pblk_pipeline_stop(struct pblk *pblk)
1526{
1527 struct pblk_line_mgmt *l_mg = &pblk->l_mg;
Javier González588726d32017-06-26 11:57:29 +02001528
1529 spin_lock(&l_mg->free_lock);
1530 pblk->state = PBLK_STATE_STOPPED;
Hans Holmberg1b0dd0b2018-10-09 13:11:54 +02001531 trace_pblk_state(pblk_disk_name(pblk), pblk->state);
Javier González588726d32017-06-26 11:57:29 +02001532 l_mg->data_line = NULL;
1533 l_mg->data_next = NULL;
1534 spin_unlock(&l_mg->free_lock);
1535}
1536
Javier Gonzáleza7c9e912018-06-01 15:04:24 +02001537void pblk_pipeline_stop(struct pblk *pblk)
1538{
1539 __pblk_pipeline_flush(pblk);
1540 __pblk_pipeline_stop(pblk);
1541}
1542
Javier González21d22872017-10-13 14:46:26 +02001543struct pblk_line *pblk_line_replace_data(struct pblk *pblk)
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001544{
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001545 struct pblk_line_mgmt *l_mg = &pblk->l_mg;
Javier González21d22872017-10-13 14:46:26 +02001546 struct pblk_line *cur, *new = NULL;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001547 unsigned int left_seblks;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001548
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001549 new = l_mg->data_next;
1550 if (!new)
Javier González21d22872017-10-13 14:46:26 +02001551 goto out;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001552
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001553 spin_lock(&l_mg->free_lock);
Javier González44cdbdc2018-10-09 13:12:07 +02001554 cur = l_mg->data_line;
1555 l_mg->data_line = new;
1556
Javier Gonzálezdd2a4342017-06-26 11:57:17 +02001557 pblk_line_setup_metadata(new, l_mg, &pblk->lm);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001558 spin_unlock(&l_mg->free_lock);
1559
Javier González588726d32017-06-26 11:57:29 +02001560retry_erase:
1561 left_seblks = atomic_read(&new->left_seblks);
1562 if (left_seblks) {
1563 /* If line is not fully erased, erase it */
1564 if (atomic_read(&new->left_eblks)) {
1565 if (pblk_line_erase(pblk, new))
Javier González21d22872017-10-13 14:46:26 +02001566 goto out;
Javier González588726d32017-06-26 11:57:29 +02001567 } else {
1568 io_schedule();
1569 }
1570 goto retry_erase;
1571 }
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001572
Javier González9cfd5a92018-06-01 16:41:14 +02001573 if (pblk_line_alloc_bitmaps(pblk, new))
1574 return NULL;
1575
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001576retry_setup:
Javier Gonzálezdd2a4342017-06-26 11:57:17 +02001577 if (!pblk_line_init_metadata(pblk, new, cur)) {
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001578 new = pblk_line_retry(pblk, new);
Javier Gonzálezf3236cef2017-04-22 01:32:46 +02001579 if (!new)
Javier González21d22872017-10-13 14:46:26 +02001580 goto out;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001581
1582 goto retry_setup;
1583 }
1584
1585 if (!pblk_line_init_bb(pblk, new, 1)) {
1586 new = pblk_line_retry(pblk, new);
1587 if (!new)
Javier González21d22872017-10-13 14:46:26 +02001588 goto out;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001589
1590 goto retry_setup;
1591 }
1592
Javier Gonzáleza7689932018-01-05 14:16:13 +01001593 pblk_rl_free_lines_dec(&pblk->rl, new, true);
1594
Javier González588726d32017-06-26 11:57:29 +02001595 /* Allocate next line for preparation */
1596 spin_lock(&l_mg->free_lock);
1597 l_mg->data_next = pblk_line_get(pblk);
1598 if (!l_mg->data_next) {
1599 /* If we cannot get a new line, we need to stop the pipeline.
1600 * Only allow as many writes in as we can store safely and then
1601 * fail gracefully
1602 */
1603 pblk_stop_writes(pblk, new);
1604 l_mg->data_next = NULL;
1605 } else {
1606 l_mg->data_next->seq_nr = l_mg->d_seq_nr++;
1607 l_mg->data_next->type = PBLK_LINETYPE_DATA;
Javier González588726d32017-06-26 11:57:29 +02001608 }
1609 spin_unlock(&l_mg->free_lock);
1610
Javier González21d22872017-10-13 14:46:26 +02001611out:
1612 return new;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001613}
1614
Javier González7bd4d372017-10-13 14:46:23 +02001615static void __pblk_line_put(struct pblk *pblk, struct pblk_line *line)
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001616{
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001617 struct pblk_line_mgmt *l_mg = &pblk->l_mg;
Hans Holmbergd6b992f2017-10-13 14:46:41 +02001618 struct pblk_gc *gc = &pblk->gc;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001619
1620 spin_lock(&line->lock);
1621 WARN_ON(line->state != PBLK_LINESTATE_GC);
Igor Konopkof2e02452019-05-04 20:38:05 +02001622 if (line->w_err_gc->has_gc_err) {
1623 spin_unlock(&line->lock);
1624 pblk_err(pblk, "line %d had errors during GC\n", line->id);
1625 pblk_put_line_back(pblk, line);
1626 line->w_err_gc->has_gc_err = 0;
1627 return;
1628 }
1629
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001630 line->state = PBLK_LINESTATE_FREE;
Hans Holmbergf2937232018-10-09 13:11:53 +02001631 trace_pblk_line_state(pblk_disk_name(pblk), line->id,
1632 line->state);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001633 line->gc_group = PBLK_LINEGC_NONE;
Javier González8e55c072018-06-01 15:04:22 +02001634 pblk_line_free(line);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001635
Hans Holmberg48b8d202018-06-01 16:41:06 +02001636 if (line->w_err_gc->has_write_err) {
1637 pblk_rl_werr_line_out(&pblk->rl);
1638 line->w_err_gc->has_write_err = 0;
1639 }
1640
1641 spin_unlock(&line->lock);
Hans Holmbergd6b992f2017-10-13 14:46:41 +02001642 atomic_dec(&gc->pipeline_gc);
1643
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001644 spin_lock(&l_mg->free_lock);
1645 list_add_tail(&line->list, &l_mg->free_list);
1646 l_mg->nr_free_lines++;
1647 spin_unlock(&l_mg->free_lock);
1648
1649 pblk_rl_free_lines_inc(&pblk->rl, line);
1650}
1651
Javier González7bd4d372017-10-13 14:46:23 +02001652static void pblk_line_put_ws(struct work_struct *work)
1653{
1654 struct pblk_line_ws *line_put_ws = container_of(work,
1655 struct pblk_line_ws, ws);
1656 struct pblk *pblk = line_put_ws->pblk;
1657 struct pblk_line *line = line_put_ws->line;
1658
1659 __pblk_line_put(pblk, line);
Kent Overstreetb906bbb2018-05-20 18:25:50 -04001660 mempool_free(line_put_ws, &pblk->gen_ws_pool);
Javier González7bd4d372017-10-13 14:46:23 +02001661}
1662
1663void pblk_line_put(struct kref *ref)
1664{
1665 struct pblk_line *line = container_of(ref, struct pblk_line, ref);
1666 struct pblk *pblk = line->pblk;
1667
1668 __pblk_line_put(pblk, line);
1669}
1670
1671void pblk_line_put_wq(struct kref *ref)
1672{
1673 struct pblk_line *line = container_of(ref, struct pblk_line, ref);
1674 struct pblk *pblk = line->pblk;
1675 struct pblk_line_ws *line_put_ws;
1676
Kent Overstreetb906bbb2018-05-20 18:25:50 -04001677 line_put_ws = mempool_alloc(&pblk->gen_ws_pool, GFP_ATOMIC);
Javier González7bd4d372017-10-13 14:46:23 +02001678 if (!line_put_ws)
1679 return;
1680
1681 line_put_ws->pblk = pblk;
1682 line_put_ws->line = line;
1683 line_put_ws->priv = NULL;
1684
1685 INIT_WORK(&line_put_ws->ws, pblk_line_put_ws);
1686 queue_work(pblk->r_end_wq, &line_put_ws->ws);
1687}
1688
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001689int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr ppa)
1690{
1691 struct nvm_rq *rqd;
1692 int err;
1693
Javier González67bf26a2017-10-13 14:46:20 +02001694 rqd = pblk_alloc_rqd(pblk, PBLK_ERASE);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001695
1696 pblk_setup_e_rq(pblk, rqd, ppa);
1697
1698 rqd->end_io = pblk_end_io_erase;
1699 rqd->private = pblk;
1700
Hans Holmberg4209c312018-10-09 13:11:55 +02001701 trace_pblk_chunk_reset(pblk_disk_name(pblk),
1702 &ppa, PBLK_CHUNK_RESET_START);
1703
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001704 /* The write thread schedules erases so that it minimizes disturbances
1705 * with writes. Thus, there is no need to take the LUN semaphore.
1706 */
Hans Holmberg48e5da722019-07-31 11:41:34 +02001707 err = pblk_submit_io(pblk, rqd, NULL);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001708 if (err) {
1709 struct nvm_tgt_dev *dev = pblk->dev;
1710 struct nvm_geo *geo = &dev->geo;
1711
Matias Bjørling4e495a42018-07-13 10:48:42 +02001712 pblk_err(pblk, "could not async erase line:%d,blk:%d\n",
Javier Gonzálezcb216652018-10-09 13:11:42 +02001713 pblk_ppa_to_line_id(ppa),
Javier Gonzálezb1bcfda2018-01-05 14:16:06 +01001714 pblk_ppa_to_pos(geo, ppa));
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001715 }
1716
1717 return err;
1718}
1719
1720struct pblk_line *pblk_line_get_data(struct pblk *pblk)
1721{
1722 return pblk->l_mg.data_line;
1723}
1724
Javier Gonzálezd624f372017-06-26 11:57:15 +02001725/* For now, always erase next line */
1726struct pblk_line *pblk_line_get_erase(struct pblk *pblk)
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001727{
1728 return pblk->l_mg.data_next;
1729}
1730
1731int pblk_line_is_full(struct pblk_line *line)
1732{
1733 return (line->left_msecs == 0);
1734}
1735
Javier González588726d32017-06-26 11:57:29 +02001736static void pblk_line_should_sync_meta(struct pblk *pblk)
1737{
1738 if (pblk_rl_is_limit(&pblk->rl))
1739 pblk_line_close_meta_sync(pblk);
1740}
1741
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001742void pblk_line_close(struct pblk *pblk, struct pblk_line *line)
1743{
Javier González32ef9412018-03-30 00:05:20 +02001744 struct nvm_tgt_dev *dev = pblk->dev;
1745 struct nvm_geo *geo = &dev->geo;
1746 struct pblk_line_meta *lm = &pblk->lm;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001747 struct pblk_line_mgmt *l_mg = &pblk->l_mg;
1748 struct list_head *move_list;
Javier González32ef9412018-03-30 00:05:20 +02001749 int i;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001750
Matias Bjørling880eda52018-07-13 10:48:37 +02001751#ifdef CONFIG_NVM_PBLK_DEBUG
Javier Gonzálezdd2a4342017-06-26 11:57:17 +02001752 WARN(!bitmap_full(line->map_bitmap, lm->sec_per_line),
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001753 "pblk: corrupt closed line %d\n", line->id);
Javier Gonzáleza84ebb82017-06-30 17:56:43 +02001754#endif
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001755
1756 spin_lock(&l_mg->free_lock);
1757 WARN_ON(!test_and_clear_bit(line->meta_line, &l_mg->meta_bitmap));
1758 spin_unlock(&l_mg->free_lock);
1759
1760 spin_lock(&l_mg->gc_lock);
1761 spin_lock(&line->lock);
1762 WARN_ON(line->state != PBLK_LINESTATE_OPEN);
1763 line->state = PBLK_LINESTATE_CLOSED;
1764 move_list = pblk_line_gc_list(pblk, line);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001765 list_add_tail(&line->list, move_list);
1766
Hans Holmberg53d82db2018-10-09 13:11:47 +02001767 mempool_free(line->map_bitmap, l_mg->bitmap_pool);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001768 line->map_bitmap = NULL;
1769 line->smeta = NULL;
1770 line->emeta = NULL;
1771
Javier González32ef9412018-03-30 00:05:20 +02001772 for (i = 0; i < lm->blk_per_line; i++) {
1773 struct pblk_lun *rlun = &pblk->luns[i];
1774 int pos = pblk_ppa_to_pos(geo, rlun->bppa);
1775 int state = line->chks[pos].state;
1776
1777 if (!(state & NVM_CHK_ST_OFFLINE))
1778 state = NVM_CHK_ST_CLOSED;
1779 }
1780
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001781 spin_unlock(&line->lock);
1782 spin_unlock(&l_mg->gc_lock);
Hans Holmbergf2937232018-10-09 13:11:53 +02001783
1784 trace_pblk_line_state(pblk_disk_name(pblk), line->id,
1785 line->state);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001786}
1787
Javier Gonzálezdd2a4342017-06-26 11:57:17 +02001788void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line)
1789{
1790 struct pblk_line_mgmt *l_mg = &pblk->l_mg;
1791 struct pblk_line_meta *lm = &pblk->lm;
1792 struct pblk_emeta *emeta = line->emeta;
1793 struct line_emeta *emeta_buf = emeta->buf;
Hans Holmberg76758392018-03-30 00:04:52 +02001794 struct wa_counters *wa = emeta_to_wa(lm, emeta_buf);
Javier Gonzálezdd2a4342017-06-26 11:57:17 +02001795
Javier González588726d32017-06-26 11:57:29 +02001796 /* No need for exact vsc value; avoid a big line lock and take aprox. */
Javier Gonzálezdd2a4342017-06-26 11:57:17 +02001797 memcpy(emeta_to_vsc(pblk, emeta_buf), l_mg->vsc_list, lm->vsc_list_len);
1798 memcpy(emeta_to_bb(emeta_buf), line->blk_bitmap, lm->blk_bitmap_len);
1799
Hans Holmberg76758392018-03-30 00:04:52 +02001800 wa->user = cpu_to_le64(atomic64_read(&pblk->user_wa));
1801 wa->pad = cpu_to_le64(atomic64_read(&pblk->pad_wa));
1802 wa->gc = cpu_to_le64(atomic64_read(&pblk->gc_wa));
1803
Javier González9cc85bc2018-10-09 13:11:45 +02001804 if (le32_to_cpu(emeta_buf->header.identifier) != PBLK_MAGIC) {
1805 emeta_buf->header.identifier = cpu_to_le32(PBLK_MAGIC);
Andy Shevchenko7e0a0842019-02-11 13:25:05 +01001806 guid_copy((guid_t *)&emeta_buf->header.uuid,
1807 &pblk->instance_uuid);
Javier González9cc85bc2018-10-09 13:11:45 +02001808 emeta_buf->header.id = cpu_to_le32(line->id);
1809 emeta_buf->header.type = cpu_to_le16(line->type);
1810 emeta_buf->header.version_major = EMETA_VERSION_MAJOR;
1811 emeta_buf->header.version_minor = EMETA_VERSION_MINOR;
1812 emeta_buf->header.crc = cpu_to_le32(
1813 pblk_calc_meta_header_crc(pblk, &emeta_buf->header));
1814 }
1815
Javier Gonzálezdd2a4342017-06-26 11:57:17 +02001816 emeta_buf->nr_valid_lbas = cpu_to_le64(line->nr_valid_lbas);
1817 emeta_buf->crc = cpu_to_le32(pblk_calc_emeta_crc(pblk, emeta_buf));
1818
1819 spin_lock(&l_mg->close_lock);
1820 spin_lock(&line->lock);
Hans Holmberg48b8d202018-06-01 16:41:06 +02001821
1822 /* Update the in-memory start address for emeta, in case it has
1823 * shifted due to write errors
1824 */
1825 if (line->emeta_ssec != line->cur_sec)
1826 line->emeta_ssec = line->cur_sec;
1827
Javier Gonzálezdd2a4342017-06-26 11:57:17 +02001828 list_add_tail(&line->list, &l_mg->emeta_list);
1829 spin_unlock(&line->lock);
1830 spin_unlock(&l_mg->close_lock);
Javier González588726d32017-06-26 11:57:29 +02001831
1832 pblk_line_should_sync_meta(pblk);
Hans Holmberg48b8d202018-06-01 16:41:06 +02001833}
1834
1835static void pblk_save_lba_list(struct pblk *pblk, struct pblk_line *line)
1836{
1837 struct pblk_line_meta *lm = &pblk->lm;
Hans Holmberg48b8d202018-06-01 16:41:06 +02001838 unsigned int lba_list_size = lm->emeta_len[2];
1839 struct pblk_w_err_gc *w_err_gc = line->w_err_gc;
1840 struct pblk_emeta *emeta = line->emeta;
1841
Hans Holmbergff8f3522019-07-31 11:41:35 +02001842 w_err_gc->lba_list = kvmalloc(lba_list_size, GFP_KERNEL);
Hans Holmberg48b8d202018-06-01 16:41:06 +02001843 memcpy(w_err_gc->lba_list, emeta_to_lbas(pblk, emeta->buf),
1844 lba_list_size);
Javier Gonzálezdd2a4342017-06-26 11:57:17 +02001845}
1846
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001847void pblk_line_close_ws(struct work_struct *work)
1848{
1849 struct pblk_line_ws *line_ws = container_of(work, struct pblk_line_ws,
1850 ws);
1851 struct pblk *pblk = line_ws->pblk;
1852 struct pblk_line *line = line_ws->line;
Hans Holmberg48b8d202018-06-01 16:41:06 +02001853 struct pblk_w_err_gc *w_err_gc = line->w_err_gc;
1854
1855 /* Write errors makes the emeta start address stored in smeta invalid,
1856 * so keep a copy of the lba list until we've gc'd the line
1857 */
1858 if (w_err_gc->has_write_err)
1859 pblk_save_lba_list(pblk, line);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001860
1861 pblk_line_close(pblk, line);
Kent Overstreetb906bbb2018-05-20 18:25:50 -04001862 mempool_free(line_ws, &pblk->gen_ws_pool);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001863}
1864
Javier Gonzálezb84ae4a82017-10-13 14:46:07 +02001865void pblk_gen_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv,
1866 void (*work)(struct work_struct *), gfp_t gfp_mask,
Javier Gonzálezef576492017-06-26 11:57:28 +02001867 struct workqueue_struct *wq)
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001868{
1869 struct pblk_line_ws *line_ws;
1870
Kent Overstreetb906bbb2018-05-20 18:25:50 -04001871 line_ws = mempool_alloc(&pblk->gen_ws_pool, gfp_mask);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001872
1873 line_ws->pblk = pblk;
1874 line_ws->line = line;
1875 line_ws->priv = priv;
1876
1877 INIT_WORK(&line_ws->ws, work);
Javier Gonzálezef576492017-06-26 11:57:28 +02001878 queue_work(wq, &line_ws->ws);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001879}
1880
Matias Bjørling43241cf2018-10-09 13:11:51 +02001881static void __pblk_down_chunk(struct pblk *pblk, int pos)
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001882{
Javier González3eaa11e2017-07-07 21:08:52 +02001883 struct pblk_lun *rlun = &pblk->luns[pos];
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001884 int ret;
1885
1886 /*
1887 * Only send one inflight I/O per LUN. Since we map at a page
1888 * granurality, all ppas in the I/O will map to the same LUN
1889 */
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001890
Javier González3eaa11e2017-07-07 21:08:52 +02001891 ret = down_timeout(&rlun->wr_sem, msecs_to_jiffies(30000));
Rakesh Panditc5493842017-10-13 14:45:58 +02001892 if (ret == -ETIME || ret == -EINTR)
Matias Bjørling4e495a42018-07-13 10:48:42 +02001893 pblk_err(pblk, "taking lun semaphore timed out: err %d\n",
1894 -ret);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001895}
1896
Matias Bjørling43241cf2018-10-09 13:11:51 +02001897void pblk_down_chunk(struct pblk *pblk, struct ppa_addr ppa)
Javier González3eaa11e2017-07-07 21:08:52 +02001898{
1899 struct nvm_tgt_dev *dev = pblk->dev;
1900 struct nvm_geo *geo = &dev->geo;
Matias Bjørling43241cf2018-10-09 13:11:51 +02001901 int pos = pblk_ppa_to_pos(geo, ppa);
Javier González3eaa11e2017-07-07 21:08:52 +02001902
Matias Bjørling43241cf2018-10-09 13:11:51 +02001903 __pblk_down_chunk(pblk, pos);
Javier González3eaa11e2017-07-07 21:08:52 +02001904}
1905
Matias Bjørling43241cf2018-10-09 13:11:51 +02001906void pblk_down_rq(struct pblk *pblk, struct ppa_addr ppa,
Javier González3eaa11e2017-07-07 21:08:52 +02001907 unsigned long *lun_bitmap)
1908{
1909 struct nvm_tgt_dev *dev = pblk->dev;
1910 struct nvm_geo *geo = &dev->geo;
Matias Bjørling43241cf2018-10-09 13:11:51 +02001911 int pos = pblk_ppa_to_pos(geo, ppa);
Javier González3eaa11e2017-07-07 21:08:52 +02001912
1913 /* If the LUN has been locked for this same request, do no attempt to
1914 * lock it again
1915 */
1916 if (test_and_set_bit(pos, lun_bitmap))
1917 return;
1918
Matias Bjørling43241cf2018-10-09 13:11:51 +02001919 __pblk_down_chunk(pblk, pos);
Javier González3eaa11e2017-07-07 21:08:52 +02001920}
1921
Matias Bjørling43241cf2018-10-09 13:11:51 +02001922void pblk_up_chunk(struct pblk *pblk, struct ppa_addr ppa)
Javier González3eaa11e2017-07-07 21:08:52 +02001923{
1924 struct nvm_tgt_dev *dev = pblk->dev;
1925 struct nvm_geo *geo = &dev->geo;
1926 struct pblk_lun *rlun;
Matias Bjørling43241cf2018-10-09 13:11:51 +02001927 int pos = pblk_ppa_to_pos(geo, ppa);
Javier González3eaa11e2017-07-07 21:08:52 +02001928
1929 rlun = &pblk->luns[pos];
1930 up(&rlun->wr_sem);
1931}
1932
Hans Holmberge99e8022018-10-09 13:11:48 +02001933void pblk_up_rq(struct pblk *pblk, unsigned long *lun_bitmap)
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001934{
1935 struct nvm_tgt_dev *dev = pblk->dev;
1936 struct nvm_geo *geo = &dev->geo;
1937 struct pblk_lun *rlun;
Javier Gonzáleza40afad92018-03-30 00:05:14 +02001938 int num_lun = geo->all_luns;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001939 int bit = -1;
1940
Javier Gonzáleza40afad92018-03-30 00:05:14 +02001941 while ((bit = find_next_bit(lun_bitmap, num_lun, bit + 1)) < num_lun) {
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001942 rlun = &pblk->luns[bit];
1943 up(&rlun->wr_sem);
1944 }
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001945}
1946
1947void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa)
1948{
Javier González9f6cb132017-10-13 14:46:12 +02001949 struct ppa_addr ppa_l2p;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001950
1951 /* logic error: lba out-of-bounds. Ignore update */
Igor Konopko847a3a22019-05-04 20:37:48 +02001952 if (!(lba < pblk->capacity)) {
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001953 WARN(1, "pblk: corrupted L2P map request\n");
1954 return;
1955 }
1956
1957 spin_lock(&pblk->trans_lock);
Javier González9f6cb132017-10-13 14:46:12 +02001958 ppa_l2p = pblk_trans_map_get(pblk, lba);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001959
Javier González9f6cb132017-10-13 14:46:12 +02001960 if (!pblk_addr_in_cache(ppa_l2p) && !pblk_ppa_empty(ppa_l2p))
1961 pblk_map_invalidate(pblk, ppa_l2p);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001962
1963 pblk_trans_map_set(pblk, lba, ppa);
1964 spin_unlock(&pblk->trans_lock);
1965}
1966
1967void pblk_update_map_cache(struct pblk *pblk, sector_t lba, struct ppa_addr ppa)
1968{
Javier Gonzálezd3401212017-10-13 14:46:14 +02001969
Matias Bjørling880eda52018-07-13 10:48:37 +02001970#ifdef CONFIG_NVM_PBLK_DEBUG
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001971 /* Callers must ensure that the ppa points to a cache address */
1972 BUG_ON(!pblk_addr_in_cache(ppa));
1973 BUG_ON(pblk_rb_pos_oob(&pblk->rwb, pblk_addr_to_cacheline(ppa)));
1974#endif
1975
1976 pblk_update_map(pblk, lba, ppa);
1977}
1978
Javier González9f6cb132017-10-13 14:46:12 +02001979int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa_new,
Javier Gonzálezd3401212017-10-13 14:46:14 +02001980 struct pblk_line *gc_line, u64 paddr_gc)
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001981{
Javier Gonzálezd3401212017-10-13 14:46:14 +02001982 struct ppa_addr ppa_l2p, ppa_gc;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001983 int ret = 1;
1984
Matias Bjørling880eda52018-07-13 10:48:37 +02001985#ifdef CONFIG_NVM_PBLK_DEBUG
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001986 /* Callers must ensure that the ppa points to a cache address */
Javier González9f6cb132017-10-13 14:46:12 +02001987 BUG_ON(!pblk_addr_in_cache(ppa_new));
1988 BUG_ON(pblk_rb_pos_oob(&pblk->rwb, pblk_addr_to_cacheline(ppa_new)));
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001989#endif
1990
1991 /* logic error: lba out-of-bounds. Ignore update */
Igor Konopko847a3a22019-05-04 20:37:48 +02001992 if (!(lba < pblk->capacity)) {
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02001993 WARN(1, "pblk: corrupted L2P map request\n");
1994 return 0;
1995 }
1996
1997 spin_lock(&pblk->trans_lock);
Javier González9f6cb132017-10-13 14:46:12 +02001998 ppa_l2p = pblk_trans_map_get(pblk, lba);
Javier Gonzálezd3401212017-10-13 14:46:14 +02001999 ppa_gc = addr_to_gen_ppa(pblk, paddr_gc, gc_line->id);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02002000
Javier Gonzálezd3401212017-10-13 14:46:14 +02002001 if (!pblk_ppa_comp(ppa_l2p, ppa_gc)) {
2002 spin_lock(&gc_line->lock);
2003 WARN(!test_bit(paddr_gc, gc_line->invalid_bitmap),
2004 "pblk: corrupted GC update");
2005 spin_unlock(&gc_line->lock);
Javier González9f6cb132017-10-13 14:46:12 +02002006
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02002007 ret = 0;
2008 goto out;
2009 }
2010
Javier González9f6cb132017-10-13 14:46:12 +02002011 pblk_trans_map_set(pblk, lba, ppa_new);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02002012out:
2013 spin_unlock(&pblk->trans_lock);
2014 return ret;
2015}
2016
Javier González9f6cb132017-10-13 14:46:12 +02002017void pblk_update_map_dev(struct pblk *pblk, sector_t lba,
2018 struct ppa_addr ppa_mapped, struct ppa_addr ppa_cache)
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02002019{
Javier González9f6cb132017-10-13 14:46:12 +02002020 struct ppa_addr ppa_l2p;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02002021
Matias Bjørling880eda52018-07-13 10:48:37 +02002022#ifdef CONFIG_NVM_PBLK_DEBUG
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02002023 /* Callers must ensure that the ppa points to a device address */
Javier González9f6cb132017-10-13 14:46:12 +02002024 BUG_ON(pblk_addr_in_cache(ppa_mapped));
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02002025#endif
2026 /* Invalidate and discard padded entries */
2027 if (lba == ADDR_EMPTY) {
Hans Holmberg76758392018-03-30 00:04:52 +02002028 atomic64_inc(&pblk->pad_wa);
Matias Bjørling880eda52018-07-13 10:48:37 +02002029#ifdef CONFIG_NVM_PBLK_DEBUG
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02002030 atomic_long_inc(&pblk->padded_wb);
2031#endif
Javier González9f6cb132017-10-13 14:46:12 +02002032 if (!pblk_ppa_empty(ppa_mapped))
2033 pblk_map_invalidate(pblk, ppa_mapped);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02002034 return;
2035 }
2036
2037 /* logic error: lba out-of-bounds. Ignore update */
Igor Konopko847a3a22019-05-04 20:37:48 +02002038 if (!(lba < pblk->capacity)) {
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02002039 WARN(1, "pblk: corrupted L2P map request\n");
2040 return;
2041 }
2042
2043 spin_lock(&pblk->trans_lock);
Javier González9f6cb132017-10-13 14:46:12 +02002044 ppa_l2p = pblk_trans_map_get(pblk, lba);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02002045
2046 /* Do not update L2P if the cacheline has been updated. In this case,
2047 * the mapped ppa must be invalidated
2048 */
Javier González9f6cb132017-10-13 14:46:12 +02002049 if (!pblk_ppa_comp(ppa_l2p, ppa_cache)) {
2050 if (!pblk_ppa_empty(ppa_mapped))
2051 pblk_map_invalidate(pblk, ppa_mapped);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02002052 goto out;
2053 }
2054
Matias Bjørling880eda52018-07-13 10:48:37 +02002055#ifdef CONFIG_NVM_PBLK_DEBUG
Javier González9f6cb132017-10-13 14:46:12 +02002056 WARN_ON(!pblk_addr_in_cache(ppa_l2p) && !pblk_ppa_empty(ppa_l2p));
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02002057#endif
2058
Javier González9f6cb132017-10-13 14:46:12 +02002059 pblk_trans_map_set(pblk, lba, ppa_mapped);
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02002060out:
2061 spin_unlock(&pblk->trans_lock);
2062}
2063
Igor Konopkoa96de642019-05-04 20:38:10 +02002064int pblk_lookup_l2p_seq(struct pblk *pblk, struct ppa_addr *ppas,
2065 sector_t blba, int nr_secs, bool *from_cache)
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02002066{
2067 int i;
2068
2069 spin_lock(&pblk->trans_lock);
Javier González7bd4d372017-10-13 14:46:23 +02002070 for (i = 0; i < nr_secs; i++) {
2071 struct ppa_addr ppa;
2072
2073 ppa = ppas[i] = pblk_trans_map_get(pblk, blba + i);
2074
2075 /* If the L2P entry maps to a line, the reference is valid */
2076 if (!pblk_ppa_empty(ppa) && !pblk_addr_in_cache(ppa)) {
Javier Gonzálezcb216652018-10-09 13:11:42 +02002077 struct pblk_line *line = pblk_ppa_to_line(pblk, ppa);
Javier González7bd4d372017-10-13 14:46:23 +02002078
Igor Konopkoa96de642019-05-04 20:38:10 +02002079 if (i > 0 && *from_cache)
2080 break;
2081 *from_cache = false;
2082
Javier González7bd4d372017-10-13 14:46:23 +02002083 kref_get(&line->ref);
Igor Konopkoa96de642019-05-04 20:38:10 +02002084 } else {
2085 if (i > 0 && !*from_cache)
2086 break;
2087 *from_cache = true;
Javier González7bd4d372017-10-13 14:46:23 +02002088 }
2089 }
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02002090 spin_unlock(&pblk->trans_lock);
Igor Konopkoa96de642019-05-04 20:38:10 +02002091 return i;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02002092}
2093
2094void pblk_lookup_l2p_rand(struct pblk *pblk, struct ppa_addr *ppas,
2095 u64 *lba_list, int nr_secs)
2096{
Javier Gonzálezd3401212017-10-13 14:46:14 +02002097 u64 lba;
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02002098 int i;
2099
2100 spin_lock(&pblk->trans_lock);
2101 for (i = 0; i < nr_secs; i++) {
2102 lba = lba_list[i];
Javier Gonzálezd3401212017-10-13 14:46:14 +02002103 if (lba != ADDR_EMPTY) {
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02002104 /* logic error: lba out-of-bounds. Ignore update */
Igor Konopko847a3a22019-05-04 20:37:48 +02002105 if (!(lba < pblk->capacity)) {
Javier Gonzáleza4bd2172017-04-15 20:55:50 +02002106 WARN(1, "pblk: corrupted L2P map request\n");
2107 continue;
2108 }
2109 ppas[i] = pblk_trans_map_get(pblk, lba);
2110 }
2111 }
2112 spin_unlock(&pblk->trans_lock);
2113}
Igor Konopko55d8ec32018-12-11 20:16:26 +01002114
2115void *pblk_get_meta_for_writes(struct pblk *pblk, struct nvm_rq *rqd)
2116{
2117 void *buffer;
2118
2119 if (pblk_is_oob_meta_supported(pblk)) {
2120 /* Just use OOB metadata buffer as always */
2121 buffer = rqd->meta_list;
2122 } else {
2123 /* We need to reuse last page of request (packed metadata)
2124 * in similar way as traditional oob metadata
2125 */
2126 buffer = page_to_virt(
2127 rqd->bio->bi_io_vec[rqd->bio->bi_vcnt - 1].bv_page);
2128 }
2129
2130 return buffer;
2131}
2132
2133void pblk_get_packed_meta(struct pblk *pblk, struct nvm_rq *rqd)
2134{
2135 void *meta_list = rqd->meta_list;
2136 void *page;
2137 int i = 0;
2138
2139 if (pblk_is_oob_meta_supported(pblk))
2140 return;
2141
2142 page = page_to_virt(rqd->bio->bi_io_vec[rqd->bio->bi_vcnt - 1].bv_page);
2143 /* We need to fill oob meta buffer with data from packed metadata */
2144 for (; i < rqd->nr_ppas; i++)
2145 memcpy(pblk_get_meta(pblk, meta_list, i),
2146 page + (i * sizeof(struct pblk_sec_meta)),
2147 sizeof(struct pblk_sec_meta));
2148}