Contributors: 7
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Ard Biesheuvel |
386 |
91.25% |
2 |
20.00% |
| Herbert Xu |
24 |
5.67% |
1 |
10.00% |
| Christoph Hellwig |
6 |
1.42% |
3 |
30.00% |
| Arnd Bergmann |
2 |
0.47% |
1 |
10.00% |
| Thomas Gleixner |
2 |
0.47% |
1 |
10.00% |
| Andrew Morton |
2 |
0.47% |
1 |
10.00% |
| Dan J Williams |
1 |
0.24% |
1 |
10.00% |
| Total |
423 |
|
10 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2012 Intel Corporation
* Copyright (C) 2017 Linaro Ltd. <ard.biesheuvel@linaro.org>
*/
#include <linux/mm.h>
#include <linux/raid/pq.h>
#include <asm/simd.h>
#include "algos.h"
#include "arm/neon.h"
static void raid6_2data_recov_neon(int disks, size_t bytes, int faila,
int failb, void **ptrs)
{
u8 *p, *q, *dp, *dq;
const u8 *pbmul; /* P multiplier table for B data */
const u8 *qmul; /* Q multiplier table (for both) */
p = (u8 *)ptrs[disks - 2];
q = (u8 *)ptrs[disks - 1];
/*
* Compute syndrome with zero for the missing data pages
* Use the dead data pages as temporary storage for
* delta p and delta q
*/
dp = (u8 *)ptrs[faila];
ptrs[faila] = page_address(ZERO_PAGE(0));
ptrs[disks - 2] = dp;
dq = (u8 *)ptrs[failb];
ptrs[failb] = page_address(ZERO_PAGE(0));
ptrs[disks - 1] = dq;
raid6_gen_syndrome(disks, bytes, ptrs);
/* Restore pointer table */
ptrs[faila] = dp;
ptrs[failb] = dq;
ptrs[disks - 2] = p;
ptrs[disks - 1] = q;
/* Now, pick the proper data tables */
pbmul = raid6_vgfmul[raid6_gfexi[failb-faila]];
qmul = raid6_vgfmul[raid6_gfinv[raid6_gfexp[faila] ^
raid6_gfexp[failb]]];
scoped_ksimd()
__raid6_2data_recov_neon(bytes, p, q, dp, dq, pbmul, qmul);
}
static void raid6_datap_recov_neon(int disks, size_t bytes, int faila,
void **ptrs)
{
u8 *p, *q, *dq;
const u8 *qmul; /* Q multiplier table */
p = (u8 *)ptrs[disks - 2];
q = (u8 *)ptrs[disks - 1];
/*
* Compute syndrome with zero for the missing data page
* Use the dead data page as temporary storage for delta q
*/
dq = (u8 *)ptrs[faila];
ptrs[faila] = page_address(ZERO_PAGE(0));
ptrs[disks - 1] = dq;
raid6_gen_syndrome(disks, bytes, ptrs);
/* Restore pointer table */
ptrs[faila] = dq;
ptrs[disks - 1] = q;
/* Now, pick the proper data tables */
qmul = raid6_vgfmul[raid6_gfinv[raid6_gfexp[faila]]];
scoped_ksimd()
__raid6_datap_recov_neon(bytes, p, q, dq, qmul);
}
const struct raid6_recov_calls raid6_recov_neon = {
.data2 = raid6_2data_recov_neon,
.datap = raid6_datap_recov_neon,
.name = "neon",
};