summaryrefslogtreecommitdiff
path: root/lib/raid6/algos.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/raid6/algos.c')
-rw-r--r--lib/raid6/algos.c166
1 files changed, 90 insertions, 76 deletions
diff --git a/lib/raid6/algos.c b/lib/raid6/algos.c
index 7e4f7a8ffa8e..799e0e5eac26 100644
--- a/lib/raid6/algos.c
+++ b/lib/raid6/algos.c
@@ -1,13 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/* -*- linux-c -*- ------------------------------------------------------- *
*
* Copyright 2002 H. Peter Anvin - All Rights Reserved
*
- * 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, Inc., 53 Temple Place Ste 330,
- * Boston MA 02111-1307, USA; either version 2 of the License, or
- * (at your option) any later version; incorporated herein by reference.
- *
* ----------------------------------------------------------------------- */
/*
@@ -23,11 +18,6 @@
#else
#include <linux/module.h>
#include <linux/gfp.h>
-#if !RAID6_USE_EMPTY_ZERO_PAGE
-/* In .bss so it's zeroed */
-const char raid6_empty_zero_page[PAGE_SIZE] __attribute__((aligned(256)));
-EXPORT_SYMBOL(raid6_empty_zero_page);
-#endif
#endif
struct raid6_calls raid6_call;
@@ -35,14 +25,10 @@ EXPORT_SYMBOL_GPL(raid6_call);
const struct raid6_calls * const raid6_algos[] = {
#if defined(__i386__) && !defined(__arch_um__)
-#ifdef CONFIG_AS_AVX512
&raid6_avx512x2,
&raid6_avx512x1,
-#endif
-#ifdef CONFIG_AS_AVX2
&raid6_avx2x2,
&raid6_avx2x1,
-#endif
&raid6_sse2x2,
&raid6_sse2x1,
&raid6_sse1x2,
@@ -51,16 +37,12 @@ const struct raid6_calls * const raid6_algos[] = {
&raid6_mmxx1,
#endif
#if defined(__x86_64__) && !defined(__arch_um__)
-#ifdef CONFIG_AS_AVX512
&raid6_avx512x4,
&raid6_avx512x2,
&raid6_avx512x1,
-#endif
-#ifdef CONFIG_AS_AVX2
&raid6_avx2x4,
&raid6_avx2x2,
&raid6_avx2x1,
-#endif
&raid6_sse2x4,
&raid6_sse2x2,
&raid6_sse2x1,
@@ -84,9 +66,19 @@ const struct raid6_calls * const raid6_algos[] = {
&raid6_neonx2,
&raid6_neonx1,
#endif
-#if defined(__ia64__)
- &raid6_intx32,
- &raid6_intx16,
+#ifdef CONFIG_LOONGARCH
+#ifdef CONFIG_CPU_HAS_LASX
+ &raid6_lasx,
+#endif
+#ifdef CONFIG_CPU_HAS_LSX
+ &raid6_lsx,
+#endif
+#endif
+#ifdef CONFIG_RISCV_ISA_V
+ &raid6_rvvx1,
+ &raid6_rvvx2,
+ &raid6_rvvx4,
+ &raid6_rvvx8,
#endif
&raid6_intx8,
&raid6_intx4,
@@ -102,13 +94,9 @@ void (*raid6_datap_recov)(int, size_t, int, void **);
EXPORT_SYMBOL_GPL(raid6_datap_recov);
const struct raid6_recov_calls *const raid6_recov_algos[] = {
-#ifdef CONFIG_AS_AVX512
+#ifdef CONFIG_X86
&raid6_recov_avx512,
-#endif
-#ifdef CONFIG_AS_AVX2
&raid6_recov_avx2,
-#endif
-#ifdef CONFIG_AS_SSSE3
&raid6_recov_ssse3,
#endif
#ifdef CONFIG_S390
@@ -117,6 +105,17 @@ const struct raid6_recov_calls *const raid6_recov_algos[] = {
#if defined(CONFIG_KERNEL_MODE_NEON)
&raid6_recov_neon,
#endif
+#ifdef CONFIG_LOONGARCH
+#ifdef CONFIG_CPU_HAS_LASX
+ &raid6_recov_lasx,
+#endif
+#ifdef CONFIG_CPU_HAS_LSX
+ &raid6_recov_lsx,
+#endif
+#endif
+#ifdef CONFIG_RISCV_ISA_V
+ &raid6_recov_rvv,
+#endif
&raid6_recov_intx1,
NULL
};
@@ -129,6 +128,9 @@ const struct raid6_recov_calls *const raid6_recov_algos[] = {
#define time_before(x, y) ((x) < (y))
#endif
+#define RAID6_TEST_DISKS 8
+#define RAID6_TEST_DISKS_ORDER 3
+
static inline const struct raid6_recov_calls *raid6_choose_recov(void)
{
const struct raid6_recov_calls *const *algo;
@@ -151,15 +153,15 @@ static inline const struct raid6_recov_calls *raid6_choose_recov(void)
}
static inline const struct raid6_calls *raid6_choose_gen(
- void *(*const dptrs)[(65536/PAGE_SIZE)+2], const int disks)
+ void *(*const dptrs)[RAID6_TEST_DISKS], const int disks)
{
- unsigned long perf, bestgenperf, bestxorperf, j0, j1;
+ unsigned long perf, bestgenperf, j0, j1;
int start = (disks>>1)-1, stop = disks-3; /* work on the second half of the disks */
const struct raid6_calls *const *algo;
const struct raid6_calls *best;
- for (bestgenperf = 0, bestxorperf = 0, best = NULL, algo = raid6_algos; *algo; algo++) {
- if (!best || (*algo)->prefer >= best->prefer) {
+ for (bestgenperf = 0, best = NULL, algo = raid6_algos; *algo; algo++) {
+ if (!best || (*algo)->priority >= best->priority) {
if ((*algo)->valid && !(*algo)->valid())
continue;
@@ -186,44 +188,50 @@ static inline const struct raid6_calls *raid6_choose_gen(
best = *algo;
}
pr_info("raid6: %-8s gen() %5ld MB/s\n", (*algo)->name,
- (perf*HZ) >> (20-16+RAID6_TIME_JIFFIES_LG2));
-
- if (!(*algo)->xor_syndrome)
- continue;
+ (perf * HZ * (disks-2)) >>
+ (20 - PAGE_SHIFT + RAID6_TIME_JIFFIES_LG2));
+ }
+ }
- perf = 0;
+ if (!best) {
+ pr_err("raid6: Yikes! No algorithm found!\n");
+ goto out;
+ }
- preempt_disable();
- j0 = jiffies;
- while ((j1 = jiffies) == j0)
- cpu_relax();
- while (time_before(jiffies,
- j1 + (1<<RAID6_TIME_JIFFIES_LG2))) {
- (*algo)->xor_syndrome(disks, start, stop,
- PAGE_SIZE, *dptrs);
- perf++;
- }
- preempt_enable();
+ raid6_call = *best;
- if (best == *algo)
- bestxorperf = perf;
+ if (!IS_ENABLED(CONFIG_RAID6_PQ_BENCHMARK)) {
+ pr_info("raid6: skipped pq benchmark and selected %s\n",
+ best->name);
+ goto out;
+ }
- pr_info("raid6: %-8s xor() %5ld MB/s\n", (*algo)->name,
- (perf*HZ) >> (20-16+RAID6_TIME_JIFFIES_LG2+1));
+ pr_info("raid6: using algorithm %s gen() %ld MB/s\n",
+ best->name,
+ (bestgenperf * HZ * (disks - 2)) >>
+ (20 - PAGE_SHIFT + RAID6_TIME_JIFFIES_LG2));
+
+ if (best->xor_syndrome) {
+ perf = 0;
+
+ preempt_disable();
+ j0 = jiffies;
+ while ((j1 = jiffies) == j0)
+ cpu_relax();
+ while (time_before(jiffies,
+ j1 + (1 << RAID6_TIME_JIFFIES_LG2))) {
+ best->xor_syndrome(disks, start, stop,
+ PAGE_SIZE, *dptrs);
+ perf++;
}
- }
+ preempt_enable();
- if (best) {
- pr_info("raid6: using algorithm %s gen() %ld MB/s\n",
- best->name,
- (bestgenperf*HZ) >> (20-16+RAID6_TIME_JIFFIES_LG2));
- if (best->xor_syndrome)
- pr_info("raid6: .... xor() %ld MB/s, rmw enabled\n",
- (bestxorperf*HZ) >> (20-16+RAID6_TIME_JIFFIES_LG2+1));
- raid6_call = *best;
- } else
- pr_err("raid6: Yikes! No algorithm found!\n");
+ pr_info("raid6: .... xor() %ld MB/s, rmw enabled\n",
+ (perf * HZ * (disks - 2)) >>
+ (20 - PAGE_SHIFT + RAID6_TIME_JIFFIES_LG2 + 1));
+ }
+out:
return best;
}
@@ -233,27 +241,33 @@ static inline const struct raid6_calls *raid6_choose_gen(
int __init raid6_select_algo(void)
{
- const int disks = (65536/PAGE_SIZE)+2;
+ const int disks = RAID6_TEST_DISKS;
const struct raid6_calls *gen_best;
const struct raid6_recov_calls *rec_best;
- char *syndromes;
- void *dptrs[(65536/PAGE_SIZE)+2];
- int i;
+ char *disk_ptr, *p;
+ void *dptrs[RAID6_TEST_DISKS];
+ int i, cycle;
- for (i = 0; i < disks-2; i++)
- dptrs[i] = ((char *)raid6_gfmul) + PAGE_SIZE*i;
-
- /* Normal code - use a 2-page allocation to avoid D$ conflict */
- syndromes = (void *) __get_free_pages(GFP_KERNEL, 1);
-
- if (!syndromes) {
+ /* prepare the buffer and fill it circularly with gfmul table */
+ disk_ptr = (char *)__get_free_pages(GFP_KERNEL, RAID6_TEST_DISKS_ORDER);
+ if (!disk_ptr) {
pr_err("raid6: Yikes! No memory available.\n");
return -ENOMEM;
}
- dptrs[disks-2] = syndromes;
- dptrs[disks-1] = syndromes + PAGE_SIZE;
+ p = disk_ptr;
+ for (i = 0; i < disks; i++)
+ dptrs[i] = p + PAGE_SIZE * i;
+
+ cycle = ((disks - 2) * PAGE_SIZE) / 65536;
+ for (i = 0; i < cycle; i++) {
+ memcpy(p, raid6_gfmul, 65536);
+ p += 65536;
+ }
+
+ if ((disks - 2) * PAGE_SIZE % 65536)
+ memcpy(p, raid6_gfmul, (disks - 2) * PAGE_SIZE % 65536);
/* select raid gen_syndrome function */
gen_best = raid6_choose_gen(&dptrs, disks);
@@ -261,7 +275,7 @@ int __init raid6_select_algo(void)
/* select raid recover functions */
rec_best = raid6_choose_recov();
- free_pages((unsigned long)syndromes, 1);
+ free_pages((unsigned long)disk_ptr, RAID6_TEST_DISKS_ORDER);
return gen_best && rec_best ? 0 : -EINVAL;
}
generated by cgit (git 2.34.1) at 2025-12-22 09:11:25 +0000