diff options
Diffstat (limited to 'crypto/async_tx/async_pq.c')
| -rw-r--r-- | crypto/async_tx/async_pq.c | 102 |
1 files changed, 55 insertions, 47 deletions
diff --git a/crypto/async_tx/async_pq.c b/crypto/async_tx/async_pq.c index 80dc567801ec..9e4bb7fbde25 100644 --- a/crypto/async_tx/async_pq.c +++ b/crypto/async_tx/async_pq.c @@ -1,23 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright(c) 2007 Yuri Tikhonov <yur@emcraft.com> * Copyright(c) 2009 Intel Corporation - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the Free - * Software Foundation; either version 2 of the License, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., 59 - * Temple Place - Suite 330, Boston, MA 02111-1307, USA. - * - * The full GNU General Public License is included in this distribution in the - * file called COPYING. */ #include <linux/kernel.h> #include <linux/interrupt.h> @@ -27,8 +11,8 @@ #include <linux/async_tx.h> #include <linux/gfp.h> -/** - * pq_scribble_page - space to hold throwaway P or Q buffer for +/* + * struct pq_scribble_page - space to hold throwaway P or Q buffer for * synchronous gen_syndrome */ static struct page *pq_scribble_page; @@ -44,7 +28,7 @@ static struct page *pq_scribble_page; #define MAX_DISKS 255 -/** +/* * do_async_gen_syndrome - asynchronously calculate P and/or Q */ static __async_inline struct dma_async_tx_descriptor * @@ -116,11 +100,11 @@ do_async_gen_syndrome(struct dma_chan *chan, return tx; } -/** +/* * do_sync_gen_syndrome - synchronously calculate a raid6 syndrome */ static void -do_sync_gen_syndrome(struct page **blocks, unsigned int offset, int disks, +do_sync_gen_syndrome(struct page **blocks, unsigned int *offsets, int disks, size_t len, struct async_submit_ctl *submit) { void **srcs; @@ -135,9 +119,10 @@ do_sync_gen_syndrome(struct page **blocks, unsigned int offset, int disks, for (i = 0; i < disks; i++) { if (blocks[i] == NULL) { BUG_ON(i > disks - 3); /* P or Q can't be zero */ - srcs[i] = (void*)raid6_empty_zero_page; + srcs[i] = raid6_get_zero_page(); } else { - srcs[i] = page_address(blocks[i]) + offset; + srcs[i] = page_address(blocks[i]) + offsets[i]; + if (i < disks - 2) { stop = i; if (start == -1) @@ -154,10 +139,23 @@ do_sync_gen_syndrome(struct page **blocks, unsigned int offset, int disks, async_tx_sync_epilog(submit); } +static inline bool +is_dma_pq_aligned_offs(struct dma_device *dev, unsigned int *offs, + int src_cnt, size_t len) +{ + int i; + + for (i = 0; i < src_cnt; i++) { + if (!is_dma_pq_aligned(dev, offs[i], 0, len)) + return false; + } + return true; +} + /** * async_gen_syndrome - asynchronously calculate a raid6 syndrome * @blocks: source blocks from idx 0..disks-3, P @ disks-2 and Q @ disks-1 - * @offset: common offset into each block (src and dest) to start transaction + * @offsets: offset array into each block (src and dest) to start transaction * @disks: number of blocks (including missing P or Q, see below) * @len: length of operation in bytes * @submit: submission/completion modifiers @@ -176,7 +174,7 @@ do_sync_gen_syndrome(struct page **blocks, unsigned int offset, int disks, * path. */ struct dma_async_tx_descriptor * -async_gen_syndrome(struct page **blocks, unsigned int offset, int disks, +async_gen_syndrome(struct page **blocks, unsigned int *offsets, int disks, size_t len, struct async_submit_ctl *submit) { int src_cnt = disks - 2; @@ -195,7 +193,7 @@ async_gen_syndrome(struct page **blocks, unsigned int offset, int disks, if (unmap && !(submit->flags & ASYNC_TX_PQ_XOR_DST) && (src_cnt <= dma_maxpq(device, 0) || dma_maxpq(device, DMA_PREP_CONTINUE) > 0) && - is_dma_pq_aligned(device, offset, 0, len)) { + is_dma_pq_aligned_offs(device, offsets, disks, len)) { struct dma_async_tx_descriptor *tx; enum dma_ctrl_flags dma_flags = 0; unsigned char coefs[MAX_DISKS]; @@ -212,8 +210,8 @@ async_gen_syndrome(struct page **blocks, unsigned int offset, int disks, for (i = 0, j = 0; i < src_cnt; i++) { if (blocks[i] == NULL) continue; - unmap->addr[j] = dma_map_page(device->dev, blocks[i], offset, - len, DMA_TO_DEVICE); + unmap->addr[j] = dma_map_page(device->dev, blocks[i], + offsets[i], len, DMA_TO_DEVICE); coefs[j] = raid6_gfexp[i]; unmap->to_cnt++; j++; @@ -226,7 +224,8 @@ async_gen_syndrome(struct page **blocks, unsigned int offset, int disks, unmap->bidi_cnt++; if (P(blocks, disks)) unmap->addr[j++] = dma_map_page(device->dev, P(blocks, disks), - offset, len, DMA_BIDIRECTIONAL); + P(offsets, disks), + len, DMA_BIDIRECTIONAL); else { unmap->addr[j++] = 0; dma_flags |= DMA_PREP_PQ_DISABLE_P; @@ -235,7 +234,8 @@ async_gen_syndrome(struct page **blocks, unsigned int offset, int disks, unmap->bidi_cnt++; if (Q(blocks, disks)) unmap->addr[j++] = dma_map_page(device->dev, Q(blocks, disks), - offset, len, DMA_BIDIRECTIONAL); + Q(offsets, disks), + len, DMA_BIDIRECTIONAL); else { unmap->addr[j++] = 0; dma_flags |= DMA_PREP_PQ_DISABLE_Q; @@ -256,13 +256,13 @@ async_gen_syndrome(struct page **blocks, unsigned int offset, int disks, if (!P(blocks, disks)) { P(blocks, disks) = pq_scribble_page; - BUG_ON(len + offset > PAGE_SIZE); + P(offsets, disks) = 0; } if (!Q(blocks, disks)) { Q(blocks, disks) = pq_scribble_page; - BUG_ON(len + offset > PAGE_SIZE); + Q(offsets, disks) = 0; } - do_sync_gen_syndrome(blocks, offset, disks, len, submit); + do_sync_gen_syndrome(blocks, offsets, disks, len, submit); return NULL; } @@ -281,11 +281,12 @@ pq_val_chan(struct async_submit_ctl *submit, struct page **blocks, int disks, si /** * async_syndrome_val - asynchronously validate a raid6 syndrome * @blocks: source blocks from idx 0..disks-3, P @ disks-2 and Q @ disks-1 - * @offset: common offset into each block (src and dest) to start transaction + * @offsets: common offset into each block (src and dest) to start transaction * @disks: number of blocks (including missing P or Q, see below) * @len: length of operation in bytes * @pqres: on val failure SUM_CHECK_P_RESULT and/or SUM_CHECK_Q_RESULT are set * @spare: temporary result buffer for the synchronous case + * @s_off: spare buffer page offset * @submit: submission / completion modifiers * * The same notes from async_gen_syndrome apply to the 'blocks', @@ -294,9 +295,9 @@ pq_val_chan(struct async_submit_ctl *submit, struct page **blocks, int disks, si * specified. */ struct dma_async_tx_descriptor * -async_syndrome_val(struct page **blocks, unsigned int offset, int disks, +async_syndrome_val(struct page **blocks, unsigned int *offsets, int disks, size_t len, enum sum_check_flags *pqres, struct page *spare, - struct async_submit_ctl *submit) + unsigned int s_off, struct async_submit_ctl *submit) { struct dma_chan *chan = pq_val_chan(submit, blocks, disks, len); struct dma_device *device = chan ? chan->device : NULL; @@ -311,7 +312,7 @@ async_syndrome_val(struct page **blocks, unsigned int offset, int disks, unmap = dmaengine_get_unmap_data(device->dev, disks, GFP_NOWAIT); if (unmap && disks <= dma_maxpq(device, 0) && - is_dma_pq_aligned(device, offset, 0, len)) { + is_dma_pq_aligned_offs(device, offsets, disks, len)) { struct device *dev = device->dev; dma_addr_t pq[2]; int i, j = 0, src_cnt = 0; @@ -323,7 +324,7 @@ async_syndrome_val(struct page **blocks, unsigned int offset, int disks, for (i = 0; i < disks-2; i++) if (likely(blocks[i])) { unmap->addr[j] = dma_map_page(dev, blocks[i], - offset, len, + offsets[i], len, DMA_TO_DEVICE); coefs[j] = raid6_gfexp[i]; unmap->to_cnt++; @@ -336,7 +337,7 @@ async_syndrome_val(struct page **blocks, unsigned int offset, int disks, dma_flags |= DMA_PREP_PQ_DISABLE_P; } else { pq[0] = dma_map_page(dev, P(blocks, disks), - offset, len, + P(offsets, disks), len, DMA_TO_DEVICE); unmap->addr[j++] = pq[0]; unmap->to_cnt++; @@ -346,7 +347,7 @@ async_syndrome_val(struct page **blocks, unsigned int offset, int disks, dma_flags |= DMA_PREP_PQ_DISABLE_Q; } else { pq[1] = dma_map_page(dev, Q(blocks, disks), - offset, len, + Q(offsets, disks), len, DMA_TO_DEVICE); unmap->addr[j++] = pq[1]; unmap->to_cnt++; @@ -371,7 +372,9 @@ async_syndrome_val(struct page **blocks, unsigned int offset, int disks, async_tx_submit(chan, tx, submit); } else { struct page *p_src = P(blocks, disks); + unsigned int p_off = P(offsets, disks); struct page *q_src = Q(blocks, disks); + unsigned int q_off = Q(offsets, disks); enum async_tx_flags flags_orig = submit->flags; dma_async_tx_callback cb_fn_orig = submit->cb_fn; void *scribble = submit->scribble; @@ -397,27 +400,32 @@ async_syndrome_val(struct page **blocks, unsigned int offset, int disks, if (p_src) { init_async_submit(submit, ASYNC_TX_XOR_ZERO_DST, NULL, NULL, NULL, scribble); - tx = async_xor(spare, blocks, offset, disks-2, len, submit); + tx = async_xor_offs(spare, s_off, + blocks, offsets, disks-2, len, submit); async_tx_quiesce(&tx); - p = page_address(p_src) + offset; - s = page_address(spare) + offset; + p = page_address(p_src) + p_off; + s = page_address(spare) + s_off; *pqres |= !!memcmp(p, s, len) << SUM_CHECK_P; } if (q_src) { P(blocks, disks) = NULL; Q(blocks, disks) = spare; + Q(offsets, disks) = s_off; init_async_submit(submit, 0, NULL, NULL, NULL, scribble); - tx = async_gen_syndrome(blocks, offset, disks, len, submit); + tx = async_gen_syndrome(blocks, offsets, disks, + len, submit); async_tx_quiesce(&tx); - q = page_address(q_src) + offset; - s = page_address(spare) + offset; + q = page_address(q_src) + q_off; + s = page_address(spare) + s_off; *pqres |= !!memcmp(q, s, len) << SUM_CHECK_Q; } /* restore P, Q and submit */ P(blocks, disks) = p_src; + P(offsets, disks) = p_off; Q(blocks, disks) = q_src; + Q(offsets, disks) = q_off; submit->cb_fn = cb_fn_orig; submit->cb_param = cb_param_orig; |