Piteball
/
android_kernel_samsung_msm8976
mirror of https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
1
1
Fork 0
Code Issues Projects Releases Wiki Activity

md update for 3.8 

Mostly just little fixes.  Probably biggest part is
 AVX accelerated RAID6 calculations.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.19 (GNU/Linux)
 
 iQIVAwUAUM/w2Dnsnt1WYoG5AQKXlg/9F5juv4CjRkRRFLqZgOPBLmn/s/2Vspgh
 2Kv8Jcyixd8jUQNbobZv0ahlJH/iSU61kpOE8QjLbKi5Y42vAbM0ZU2aHJ6nqGZy
 HiTI8K+7kTvCK3ZXLcUQ+4oPPBNTcoTZbLWaEOmIqB1ruLddoIR7M9fG3PspVeG0
 jijnXR8IfL6mr4YDXnJkEhFrneTysVik05RkKYZKyM/9r3stAoMJ9o0/EFy3OFxb
 lO6mLEtvjVArXcnuf1RMCw2YKgki9Y4r73HCplgQsVFvcxcpsya4gFF+lRR5j7cO
 /eMYbSQ89iWEYKh1dJ9u1nofc8fX5ia71QQyO1fkO4GXRHXPVIyBgKSbe7SaL6iG
 JUMm7idUV2rZGeq3ln3k8Yor4QqHvN1n7pRKKUF+ZdsPoQ1B/TABu+qpsAdo5ZhP
 fxDsULsHrzEaxgetd4V8F2Uptca9ni43sMI8mwsvVlA0p6SOzMIyoJLC9xAZpx11
 b3H3+7Oje/fasmszBoq5B9uAlSt9XXVN4DDn2q6cX+S96JSX6jcsN1c6cJBO+ZxB
 OU6a6P5mnU6HuxU02rspe7G8BeU+ybaonErOW+GdyC4r7M/cImC0dSp0NGHK2211
 oqu0xBx/Q/ddTFwKQqa4HzR2ws09+LhKbjdqYIhCEKttIbLIAjf73ARZ19XPSRRX
 pDR/ey2CB6E=
 =uK52
 -----END PGP SIGNATURE-----

Merge tag 'md-3.8' of git://neil.brown.name/md

Pull md update from Neil Brown:
 "Mostly just little fixes.  Probably biggest part is AVX accelerated
  RAID6 calculations."

* tag 'md-3.8' of git://neil.brown.name/md:
  md/raid5: add blktrace calls
  md/raid5: use async_tx_quiesce() instead of open-coding it.
  md: Use ->curr_resync as last completed request when cleanly aborting resync.
  lib/raid6: build proper files on corresponding arch
  lib/raid6: Add AVX2 optimized gen_syndrome functions
  lib/raid6: Add AVX2 optimized recovery functions
  md: Update checkpoint of resync/recovery based on time.
  md:Add place to update ->recovery_cp.
  md.c: re-indent various 'switch' statements.
  md: close race between removing and adding a device.
  md: removed unused variable in calc_sb_1_csm.
This commit is contained in:
Linus Torvalds 2012-12-18 09:32:44 -08:00
parent 848b81415c a9add5d92b
commit ea88eeac0c
16 changed files with 813 additions and 162 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/x86/Makefile
View File

@ -123,9 +123,10 @@ cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTI
# does binutils support specific instructions?
asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1)
avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1)
avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1)
KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr)
KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr)
KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr)
KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr)
LDFLAGS := -m elf_$(UTS_MACHINE)

264
drivers/md/md.c
View File

@ -1414,12 +1414,11 @@ static __le32 calc_sb_1_csum(struct mdp_superblock_1 * sb)
unsigned long long newcsum;
int size = 256 + le32_to_cpu(sb->max_dev)*2;
__le32 *isuper = (__le32*)sb;
int i;
disk_csum = sb->sb_csum;
sb->sb_csum = 0;
newcsum = 0;
for (i=0; size>=4; size -= 4 )
for (; size >= 4; size -= 4)
newcsum += le32_to_cpu(*isuper++);
if (size == 2)
@ -4753,6 +4752,8 @@ md_attr_store(struct kobject *kobj, struct attribute *attr,
}
mddev_get(mddev);
spin_unlock(&all_mddevs_lock);
if (entry->store == new_dev_store)
flush_workqueue(md_misc_wq);
rv = mddev_lock(mddev);
if (!rv) {
rv = entry->store(mddev, page, length);
@ -6346,24 +6347,23 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
* Commands dealing with the RAID driver but not any
* particular array:
*/
switch (cmd)
{
case RAID_VERSION:
err = get_version(argp);
goto done;
switch (cmd) {
case RAID_VERSION:
err = get_version(argp);
goto done;
case PRINT_RAID_DEBUG:
err = 0;
md_print_devices();
goto done;
case PRINT_RAID_DEBUG:
err = 0;
md_print_devices();
goto done;
#ifndef MODULE
case RAID_AUTORUN:
err = 0;
autostart_arrays(arg);
goto done;
case RAID_AUTORUN:
err = 0;
autostart_arrays(arg);
goto done;
#endif
default:;
default:;
}
/*
@ -6398,6 +6398,10 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
goto abort;
}
if (cmd == ADD_NEW_DISK)
/* need to ensure md_delayed_delete() has completed */
flush_workqueue(md_misc_wq);
err = mddev_lock(mddev);
if (err) {
printk(KERN_INFO
@ -6406,50 +6410,44 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
goto abort;
}
switch (cmd)
{
case SET_ARRAY_INFO:
{
mdu_array_info_t info;
if (!arg)
memset(&info, 0, sizeof(info));
else if (copy_from_user(&info, argp, sizeof(info))) {
err = -EFAULT;
goto abort_unlock;
}
if (mddev->pers) {
err = update_array_info(mddev, &info);
if (err) {
printk(KERN_WARNING "md: couldn't update"
" array info. %d\n", err);
goto abort_unlock;
}
goto done_unlock;
}
if (!list_empty(&mddev->disks)) {
printk(KERN_WARNING
"md: array %s already has disks!\n",
mdname(mddev));
err = -EBUSY;
goto abort_unlock;
}
if (mddev->raid_disks) {
printk(KERN_WARNING
"md: array %s already initialised!\n",
mdname(mddev));
err = -EBUSY;
goto abort_unlock;
}
err = set_array_info(mddev, &info);
if (err) {
printk(KERN_WARNING "md: couldn't set"
" array info. %d\n", err);
goto abort_unlock;
}
if (cmd == SET_ARRAY_INFO) {
mdu_array_info_t info;
if (!arg)
memset(&info, 0, sizeof(info));
else if (copy_from_user(&info, argp, sizeof(info))) {
err = -EFAULT;
goto abort_unlock;
}
if (mddev->pers) {
err = update_array_info(mddev, &info);
if (err) {
printk(KERN_WARNING "md: couldn't update"
" array info. %d\n", err);
goto abort_unlock;
}
goto done_unlock;
default:;
}
if (!list_empty(&mddev->disks)) {
printk(KERN_WARNING
"md: array %s already has disks!\n",
mdname(mddev));
err = -EBUSY;
goto abort_unlock;
}
if (mddev->raid_disks) {
printk(KERN_WARNING
"md: array %s already initialised!\n",
mdname(mddev));
err = -EBUSY;
goto abort_unlock;
}
err = set_array_info(mddev, &info);
if (err) {
printk(KERN_WARNING "md: couldn't set"
" array info. %d\n", err);
goto abort_unlock;
}
goto done_unlock;
}
/*
@ -6468,52 +6466,51 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
/*
* Commands even a read-only array can execute:
*/
switch (cmd)
{
case GET_BITMAP_FILE:
err = get_bitmap_file(mddev, argp);
switch (cmd) {
case GET_BITMAP_FILE:
err = get_bitmap_file(mddev, argp);
goto done_unlock;
case RESTART_ARRAY_RW:
err = restart_array(mddev);
goto done_unlock;
case STOP_ARRAY:
err = do_md_stop(mddev, 0, bdev);
goto done_unlock;
case STOP_ARRAY_RO:
err = md_set_readonly(mddev, bdev);
goto done_unlock;
case BLKROSET:
if (get_user(ro, (int __user *)(arg))) {
err = -EFAULT;
goto done_unlock;
}
err = -EINVAL;
/* if the bdev is going readonly the value of mddev->ro
* does not matter, no writes are coming
*/
if (ro)
goto done_unlock;
case RESTART_ARRAY_RW:
/* are we are already prepared for writes? */
if (mddev->ro != 1)
goto done_unlock;
/* transitioning to readauto need only happen for
* arrays that call md_write_start
*/
if (mddev->pers) {
err = restart_array(mddev);
goto done_unlock;
case STOP_ARRAY:
err = do_md_stop(mddev, 0, bdev);
goto done_unlock;
case STOP_ARRAY_RO:
err = md_set_readonly(mddev, bdev);
goto done_unlock;
case BLKROSET:
if (get_user(ro, (int __user *)(arg))) {
err = -EFAULT;
goto done_unlock;
if (err == 0) {
mddev->ro = 2;
set_disk_ro(mddev->gendisk, 0);
}
err = -EINVAL;
/* if the bdev is going readonly the value of mddev->ro
* does not matter, no writes are coming
*/
if (ro)
goto done_unlock;
/* are we are already prepared for writes? */
if (mddev->ro != 1)
goto done_unlock;
/* transitioning to readauto need only happen for
* arrays that call md_write_start
*/
if (mddev->pers) {
err = restart_array(mddev);
if (err == 0) {
mddev->ro = 2;
set_disk_ro(mddev->gendisk, 0);
}
}
goto done_unlock;
}
goto done_unlock;
}
/*
@ -6535,37 +6532,36 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
}
}
switch (cmd)
switch (cmd) {
case ADD_NEW_DISK:
{
case ADD_NEW_DISK:
{
mdu_disk_info_t info;
if (copy_from_user(&info, argp, sizeof(info)))
err = -EFAULT;
else
err = add_new_disk(mddev, &info);
goto done_unlock;
}
mdu_disk_info_t info;
if (copy_from_user(&info, argp, sizeof(info)))
err = -EFAULT;
else
err = add_new_disk(mddev, &info);
goto done_unlock;
}
case HOT_REMOVE_DISK:
err = hot_remove_disk(mddev, new_decode_dev(arg));
goto done_unlock;
case HOT_REMOVE_DISK:
err = hot_remove_disk(mddev, new_decode_dev(arg));
goto done_unlock;
case HOT_ADD_DISK:
err = hot_add_disk(mddev, new_decode_dev(arg));
goto done_unlock;
case HOT_ADD_DISK:
err = hot_add_disk(mddev, new_decode_dev(arg));
goto done_unlock;
case RUN_ARRAY:
err = do_md_run(mddev);
goto done_unlock;
case RUN_ARRAY:
err = do_md_run(mddev);
goto done_unlock;
case SET_BITMAP_FILE:
err = set_bitmap_file(mddev, (int)arg);
goto done_unlock;
case SET_BITMAP_FILE:
err = set_bitmap_file(mddev, (int)arg);
goto done_unlock;
default:
err = -EINVAL;
goto abort_unlock;
default:
err = -EINVAL;
goto abort_unlock;
}
done_unlock:
@ -7184,6 +7180,7 @@ void md_done_sync(struct mddev *mddev, int blocks, int ok)
wake_up(&mddev->recovery_wait);
if (!ok) {
set_bit(MD_RECOVERY_INTR, &mddev->recovery);
set_bit(MD_RECOVERY_ERROR, &mddev->recovery);
md_wakeup_thread(mddev->thread);
// stop recovery, signal do_sync ....
}
@ -7281,6 +7278,7 @@ EXPORT_SYMBOL_GPL(md_allow_write);
#define SYNC_MARKS 10
#define SYNC_MARK_STEP (3*HZ)
#define UPDATE_FREQUENCY (5*60*HZ)
void md_do_sync(struct md_thread *thread)
{
struct mddev *mddev = thread->mddev;
@ -7289,6 +7287,7 @@ void md_do_sync(struct md_thread *thread)
window;
sector_t max_sectors,j, io_sectors;
unsigned long mark[SYNC_MARKS];
unsigned long update_time;
sector_t mark_cnt[SYNC_MARKS];
int last_mark,m;
struct list_head *tmp;
@ -7448,6 +7447,7 @@ void md_do_sync(struct md_thread *thread)
mddev->curr_resync_completed = j;
sysfs_notify(&mddev->kobj, NULL, "sync_completed");
md_new_event(mddev);
update_time = jiffies;
blk_start_plug(&plug);
while (j < max_sectors) {
@ -7459,6 +7459,7 @@ void md_do_sync(struct md_thread *thread)
((mddev->curr_resync > mddev->curr_resync_completed &&
(mddev->curr_resync - mddev->curr_resync_completed)
> (max_sectors >> 4)) ||
time_after_eq(jiffies, update_time + UPDATE_FREQUENCY) ||
(j - mddev->curr_resync_completed)*2
>= mddev->resync_max - mddev->curr_resync_completed
)) {
@ -7466,6 +7467,10 @@ void md_do_sync(struct md_thread *thread)
wait_event(mddev->recovery_wait,
atomic_read(&mddev->recovery_active) == 0);
mddev->curr_resync_completed = j;
if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) &&
j > mddev->recovery_cp)
mddev->recovery_cp = j;
update_time = jiffies;
set_bit(MD_CHANGE_CLEAN, &mddev->flags);
sysfs_notify(&mddev->kobj, NULL, "sync_completed");
}
@ -7570,8 +7575,13 @@ void md_do_sync(struct md_thread *thread)
printk(KERN_INFO
"md: checkpointing %s of %s.\n",
desc, mdname(mddev));
mddev->recovery_cp =
mddev->curr_resync_completed;
if (test_bit(MD_RECOVERY_ERROR,
&mddev->recovery))
mddev->recovery_cp =
mddev->curr_resync_completed;
else
mddev->recovery_cp =
mddev->curr_resync;
}
} else
mddev->recovery_cp = MaxSector;

2
drivers/md/md.h
View File

@ -307,6 +307,7 @@ struct mddev {
* REQUEST: user-space has requested a sync (used with SYNC)
* CHECK: user-space request for check-only, no repair
* RESHAPE: A reshape is happening
* ERROR: sync-action interrupted because io-error
*
* If neither SYNC or RESHAPE are set, then it is a recovery.
*/
@ -320,6 +321,7 @@ struct mddev {
#define MD_RECOVERY_CHECK 7
#define MD_RECOVERY_RESHAPE 8
#define MD_RECOVERY_FROZEN 9
#define MD_RECOVERY_ERROR 10
unsigned long recovery;
/* If a RAID personality determines that recovery (of a particular

43
drivers/md/raid5.c
View File

@ -53,6 +53,8 @@
#include <linux/cpu.h>
#include <linux/slab.h>
#include <linux/ratelimit.h>
#include <trace/events/block.h>
#include "md.h"
#include "raid5.h"
#include "raid0.h"
@ -182,6 +184,8 @@ static void return_io(struct bio *return_bi)
return_bi = bi->bi_next;
bi->bi_next = NULL;
bi->bi_size = 0;
trace_block_bio_complete(bdev_get_queue(bi->bi_bdev),
bi, 0);
bio_endio(bi, 0);
bi = return_bi;
}
@ -670,6 +674,9 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s)
bi->bi_next = NULL;
if (rrdev)
set_bit(R5_DOUBLE_LOCKED, &sh->dev[i].flags);
trace_block_bio_remap(bdev_get_queue(bi->bi_bdev),
bi, disk_devt(conf->mddev->gendisk),
sh->dev[i].sector);
generic_make_request(bi);
}
if (rrdev) {
@ -697,6 +704,9 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s)
rbi->bi_io_vec[0].bv_offset = 0;
rbi->bi_size = STRIPE_SIZE;
rbi->bi_next = NULL;
trace_block_bio_remap(bdev_get_queue(rbi->bi_bdev),
rbi, disk_devt(conf->mddev->gendisk),
sh->dev[i].sector);
generic_make_request(rbi);
}
if (!rdev && !rrdev) {
@ -2853,8 +2863,10 @@ static void handle_stripe_dirtying(struct r5conf *conf,
pr_debug("for sector %llu, rmw=%d rcw=%d\n",
(unsigned long long)sh->sector, rmw, rcw);
set_bit(STRIPE_HANDLE, &sh->state);
if (rmw < rcw && rmw > 0)
if (rmw < rcw && rmw > 0) {
/* prefer read-modify-write, but need to get some data */
blk_add_trace_msg(conf->mddev->queue, "raid5 rmw %llu %d",
(unsigned long long)sh->sector, rmw);
for (i = disks; i--; ) {
struct r5dev *dev = &sh->dev[i];
if ((dev->towrite || i == sh->pd_idx) &&
@ -2865,7 +2877,7 @@ static void handle_stripe_dirtying(struct r5conf *conf,
if (
test_bit(STRIPE_PREREAD_ACTIVE, &sh->state)) {
pr_debug("Read_old block "
"%d for r-m-w\n", i);
"%d for r-m-w\n", i);
set_bit(R5_LOCKED, &dev->flags);
set_bit(R5_Wantread, &dev->flags);
s->locked++;
@ -2875,8 +2887,10 @@ static void handle_stripe_dirtying(struct r5conf *conf,
}
}
}
}
if (rcw <= rmw && rcw > 0) {
/* want reconstruct write, but need to get some data */
int qread =0;
rcw = 0;
for (i = disks; i--; ) {
struct r5dev *dev = &sh->dev[i];
@ -2895,12 +2909,17 @@ static void handle_stripe_dirtying(struct r5conf *conf,
set_bit(R5_LOCKED, &dev->flags);
set_bit(R5_Wantread, &dev->flags);
s->locked++;
qread++;
} else {
set_bit(STRIPE_DELAYED, &sh->state);
set_bit(STRIPE_HANDLE, &sh->state);
}
}
}
if (rcw)
blk_add_trace_msg(conf->mddev->queue, "raid5 rcw %llu %d %d %d",
(unsigned long long)sh->sector,
rcw, qread, test_bit(STRIPE_DELAYED, &sh->state));
}
/* now if nothing is locked, and if we have enough data,
* we can start a write request
@ -3222,10 +3241,7 @@ static void handle_stripe_expansion(struct r5conf *conf, struct stripe_head *sh)
}
/* done submitting copies, wait for them to complete */
if (tx) {
async_tx_ack(tx);
dma_wait_for_async_tx(tx);
}
async_tx_quiesce(&tx);
}
/*
@ -3901,6 +3917,8 @@ static void raid5_align_endio(struct bio *bi, int error)
rdev_dec_pending(rdev, conf->mddev);
if (!error && uptodate) {
trace_block_bio_complete(bdev_get_queue(raid_bi->bi_bdev),
raid_bi, 0);
bio_endio(raid_bi, 0);
if (atomic_dec_and_test(&conf->active_aligned_reads))
wake_up(&conf->wait_for_stripe);
@ -4005,6 +4023,9 @@ static int chunk_aligned_read(struct mddev *mddev, struct bio * raid_bio)
atomic_inc(&conf->active_aligned_reads);
spin_unlock_irq(&conf->device_lock);
trace_block_bio_remap(bdev_get_queue(align_bi->bi_bdev),
align_bi, disk_devt(mddev->gendisk),
raid_bio->bi_sector);
generic_make_request(align_bi);
return 1;
} else {
@ -4079,6 +4100,7 @@ static void raid5_unplug(struct blk_plug_cb *blk_cb, bool from_schedule)
struct stripe_head *sh;
struct mddev *mddev = cb->cb.data;
struct r5conf *conf = mddev->private;
int cnt = 0;
if (cb->list.next && !list_empty(&cb->list)) {
spin_lock_irq(&conf->device_lock);
@ -4093,9 +4115,11 @@ static void raid5_unplug(struct blk_plug_cb *blk_cb, bool from_schedule)
smp_mb__before_clear_bit();
clear_bit(STRIPE_ON_UNPLUG_LIST, &sh->state);
__release_stripe(conf, sh);
cnt++;
}
spin_unlock_irq(&conf->device_lock);
}
trace_block_unplug(mddev->queue, cnt, !from_schedule);
kfree(cb);
}
@ -4353,6 +4377,8 @@ static void make_request(struct mddev *mddev, struct bio * bi)
if ( rw == WRITE )
md_write_end(mddev);
trace_block_bio_complete(bdev_get_queue(bi->bi_bdev),
bi, 0);
bio_endio(bi, 0);
}
}
@ -4729,8 +4755,11 @@ static int retry_aligned_read(struct r5conf *conf, struct bio *raid_bio)
handled++;
}
remaining = raid5_dec_bi_active_stripes(raid_bio);
if (remaining == 0)
if (remaining == 0) {
trace_block_bio_complete(bdev_get_queue(raid_bio->bi_bdev),
raid_bio, 0);
bio_endio(raid_bio, 0);
}
if (atomic_dec_and_test(&conf->active_aligned_reads))
wake_up(&conf->wait_for_stripe);
return handled;

4
include/linux/raid/pq.h
View File

@ -98,6 +98,9 @@ extern const struct raid6_calls raid6_altivec1;
extern const struct raid6_calls raid6_altivec2;
extern const struct raid6_calls raid6_altivec4;
extern const struct raid6_calls raid6_altivec8;
extern const struct raid6_calls raid6_avx2x1;
extern const struct raid6_calls raid6_avx2x2;
extern const struct raid6_calls raid6_avx2x4;
struct raid6_recov_calls {
void (*data2)(int, size_t, int, int, void **);
@ -109,6 +112,7 @@ struct raid6_recov_calls {
extern const struct raid6_recov_calls raid6_recov_intx1;
extern const struct raid6_recov_calls raid6_recov_ssse3;
extern const struct raid6_recov_calls raid6_recov_avx2;
/* Algorithm list */
extern const struct raid6_calls * const raid6_algos[];

9
lib/raid6/Makefile
View File

@ -1,8 +1,11 @@
obj-$(CONFIG_RAID6_PQ) += raid6_pq.o
raid6_pq-y += algos.o recov.o recov_ssse3.o tables.o int1.o int2.o int4.o \
int8.o int16.o int32.o altivec1.o altivec2.o altivec4.o \
altivec8.o mmx.o sse1.o sse2.o
raid6_pq-y += algos.o recov.o tables.o int1.o int2.o int4.o \
int8.o int16.o int32.o
raid6_pq-$(CONFIG_X86) += recov_ssse3.o recov_avx2.o mmx.o sse1.o sse2.o avx2.o
raid6_pq-$(CONFIG_ALTIVEC) += altivec1.o altivec2.o altivec4.o altivec8.o
hostprogs-y += mktables
quiet_cmd_unroll = UNROLL $@

12
lib/raid6/algos.c
View File

@ -45,11 +45,20 @@ const struct raid6_calls * const raid6_algos[] = {
&raid6_sse1x2,
&raid6_sse2x1,
&raid6_sse2x2,
#ifdef CONFIG_AS_AVX2
&raid6_avx2x1,
&raid6_avx2x2,
#endif
#endif
#if defined(__x86_64__) && !defined(__arch_um__)
&raid6_sse2x1,
&raid6_sse2x2,
&raid6_sse2x4,
#ifdef CONFIG_AS_AVX2
&raid6_avx2x1,
&raid6_avx2x2,
&raid6_avx2x4,
#endif
#endif
#ifdef CONFIG_ALTIVEC
&raid6_altivec1,
@ -72,6 +81,9 @@ EXPORT_SYMBOL_GPL(raid6_datap_recov);
const struct raid6_recov_calls *const raid6_recov_algos[] = {
#if (defined(__i386__) || defined(__x86_64__)) && !defined(__arch_um__)
#ifdef CONFIG_AS_AVX2
&raid6_recov_avx2,
#endif
&raid6_recov_ssse3,
#endif
&raid6_recov_intx1,

3
lib/raid6/altivec.uc
View File

@ -24,13 +24,10 @@
#include <linux/raid/pq.h>
#ifdef CONFIG_ALTIVEC
#include <altivec.h>
#ifdef __KERNEL__
# include <asm/cputable.h>
# include <asm/switch_to.h>
#endif
/*
* This is the C data type to use. We use a vector of

251
lib/raid6/avx2.c Normal file
View File

@ -0,0 +1,251 @@
/* -*- linux-c -*- ------------------------------------------------------- *
*
* Copyright (C) 2012 Intel Corporation
* Author: Yuanhan Liu <yuanhan.liu@linux.intel.com>
*
* Based on sse2.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.
*
* ----------------------------------------------------------------------- */
/*
* AVX2 implementation of RAID-6 syndrome functions
*
*/
#ifdef CONFIG_AS_AVX2
#include <linux/raid/pq.h>
#include "x86.h"
static const struct raid6_avx2_constants {
u64 x1d[4];
} raid6_avx2_constants __aligned(32) = {
{ 0x1d1d1d1d1d1d1d1dULL, 0x1d1d1d1d1d1d1d1dULL,
0x1d1d1d1d1d1d1d1dULL, 0x1d1d1d1d1d1d1d1dULL,},
};
static int raid6_have_avx2(void)
{
return boot_cpu_has(X86_FEATURE_AVX2) && boot_cpu_has(X86_FEATURE_AVX);
}
/*
* Plain AVX2 implementation
*/
static void raid6_avx21_gen_syndrome(int disks, size_t bytes, void **ptrs)
{
u8 **dptr = (u8 **)ptrs;
u8 *p, *q;
int d, z, z0;
z0 = disks - 3; /* Highest data disk */
p = dptr[z0+1]; /* XOR parity */
q = dptr[z0+2]; /* RS syndrome */
kernel_fpu_begin();
asm volatile("vmovdqa %0,%%ymm0" : : "m" (raid6_avx2_constants.x1d[0]));
asm volatile("vpxor %ymm3,%ymm3,%ymm3"); /* Zero temp */
for (d = 0; d < bytes; d += 32) {
asm volatile("prefetchnta %0" : : "m" (dptr[z0][d]));
asm volatile("vmovdqa %0,%%ymm2" : : "m" (dptr[z0][d]));/* P[0] */
asm volatile("prefetchnta %0" : : "m" (dptr[z0-1][d]));
asm volatile("vmovdqa %ymm2,%ymm4");/* Q[0] */
asm volatile("vmovdqa %0,%%ymm6" : : "m" (dptr[z0-1][d]));
for (z = z0-2; z >= 0; z--) {
asm volatile("prefetchnta %0" : : "m" (dptr[z][d]));
asm volatile("vpcmpgtb %ymm4,%ymm3,%ymm5");
asm volatile("vpaddb %ymm4,%ymm4,%ymm4");
asm volatile("vpand %ymm0,%ymm5,%ymm5");
asm volatile("vpxor %ymm5,%ymm4,%ymm4");
asm volatile("vpxor %ymm6,%ymm2,%ymm2");
asm volatile("vpxor %ymm6,%ymm4,%ymm4");
asm volatile("vmovdqa %0,%%ymm6" : : "m" (dptr[z][d]));
}
asm volatile("vpcmpgtb %ymm4,%ymm3,%ymm5");
asm volatile("vpaddb %ymm4,%ymm4,%ymm4");
asm volatile("vpand %ymm0,%ymm5,%ymm5");
asm volatile("vpxor %ymm5,%ymm4,%ymm4");
asm volatile("vpxor %ymm6,%ymm2,%ymm2");
asm volatile("vpxor %ymm6,%ymm4,%ymm4");
asm volatile("vmovntdq %%ymm2,%0" : "=m" (p[d]));
asm volatile("vpxor %ymm2,%ymm2,%ymm2");
asm volatile("vmovntdq %%ymm4,%0" : "=m" (q[d]));
asm volatile("vpxor %ymm4,%ymm4,%ymm4");
}
asm volatile("sfence" : : : "memory");
kernel_fpu_end();
}
const struct raid6_calls raid6_avx2x1 = {
raid6_avx21_gen_syndrome,
raid6_have_avx2,
"avx2x1",
1 /* Has cache hints */
};
/*
* Unrolled-by-2 AVX2 implementation
*/
static void raid6_avx22_gen_syndrome(int disks, size_t bytes, void **ptrs)
{
u8 **dptr = (u8 **)ptrs;
u8 *p, *q;
int d, z, z0;
z0 = disks - 3; /* Highest data disk */
p = dptr[z0+1]; /* XOR parity */
q = dptr[z0+2]; /* RS syndrome */
kernel_fpu_begin();
asm volatile("vmovdqa %0,%%ymm0" : : "m" (raid6_avx2_constants.x1d[0]));
asm volatile("vpxor %ymm1,%ymm1,%ymm1"); /* Zero temp */
/* We uniformly assume a single prefetch covers at least 32 bytes */
for (d = 0; d < bytes; d += 64) {
asm volatile("prefetchnta %0" : : "m" (dptr[z0][d]));
asm volatile("prefetchnta %0" : : "m" (dptr[z0][d+32]));
asm volatile("vmovdqa %0,%%ymm2" : : "m" (dptr[z0][d]));/* P[0] */
asm volatile("vmovdqa %0,%%ymm3" : : "m" (dptr[z0][d+32]));/* P[1] */
asm volatile("vmovdqa %ymm2,%ymm4"); /* Q[0] */
asm volatile("vmovdqa %ymm3,%ymm6"); /* Q[1] */
for (z = z0-1; z >= 0; z--) {
asm volatile("prefetchnta %0" : : "m" (dptr[z][d]));
asm volatile("prefetchnta %0" : : "m" (dptr[z][d+32]));
asm volatile("vpcmpgtb %ymm4,%ymm1,%ymm5");
asm volatile("vpcmpgtb %ymm6,%ymm1,%ymm7");
asm volatile("vpaddb %ymm4,%ymm4,%ymm4");
asm volatile("vpaddb %ymm6,%ymm6,%ymm6");
asm volatile("vpand %ymm0,%ymm5,%ymm5");
asm volatile("vpand %ymm0,%ymm7,%ymm7");
asm volatile("vpxor %ymm5,%ymm4,%ymm4");
asm volatile("vpxor %ymm7,%ymm6,%ymm6");
asm volatile("vmovdqa %0,%%ymm5" : : "m" (dptr[z][d]));
asm volatile("vmovdqa %0,%%ymm7" : : "m" (dptr[z][d+32]));
asm volatile("vpxor %ymm5,%ymm2,%ymm2");
asm volatile("vpxor %ymm7,%ymm3,%ymm3");
asm volatile("vpxor %ymm5,%ymm4,%ymm4");
asm volatile("vpxor %ymm7,%ymm6,%ymm6");
}
asm volatile("vmovntdq %%ymm2,%0" : "=m" (p[d]));
asm volatile("vmovntdq %%ymm3,%0" : "=m" (p[d+32]));
asm volatile("vmovntdq %%ymm4,%0" : "=m" (q[d]));
asm volatile("vmovntdq %%ymm6,%0" : "=m" (q[d+32]));
}
asm volatile("sfence" : : : "memory");
kernel_fpu_end();
}
const struct raid6_calls raid6_avx2x2 = {
raid6_avx22_gen_syndrome,
raid6_have_avx2,
"avx2x2",
1 /* Has cache hints */
};
#ifdef CONFIG_X86_64
/*
* Unrolled-by-4 AVX2 implementation
*/
static void raid6_avx24_gen_syndrome(int disks, size_t bytes, void **ptrs)
{
u8 **dptr = (u8 **)ptrs;
u8 *p, *q;
int d, z, z0;
z0 = disks - 3; /* Highest data disk */
p = dptr[z0+1]; /* XOR parity */
q = dptr[z0+2]; /* RS syndrome */
kernel_fpu_begin();
asm volatile("vmovdqa %0,%%ymm0" : : "m" (raid6_avx2_constants.x1d[0]));
asm volatile("vpxor %ymm1,%ymm1,%ymm1"); /* Zero temp */
asm volatile("vpxor %ymm2,%ymm2,%ymm2"); /* P[0] */
asm volatile("vpxor %ymm3,%ymm3,%ymm3"); /* P[1] */
asm volatile("vpxor %ymm4,%ymm4,%ymm4"); /* Q[0] */
asm volatile("vpxor %ymm6,%ymm6,%ymm6"); /* Q[1] */
asm volatile("vpxor %ymm10,%ymm10,%ymm10"); /* P[2] */
asm volatile("vpxor %ymm11,%ymm11,%ymm11"); /* P[3] */
asm volatile("vpxor %ymm12,%ymm12,%ymm12"); /* Q[2] */
asm volatile("vpxor %ymm14,%ymm14,%ymm14"); /* Q[3] */
for (d = 0; d < bytes; d += 128) {
for (z = z0; z >= 0; z--) {
asm volatile("prefetchnta %0" : : "m" (dptr[z][d]));
asm volatile("prefetchnta %0" : : "m" (dptr[z][d+32]));
asm volatile("prefetchnta %0" : : "m" (dptr[z][d+64]));
asm volatile("prefetchnta %0" : : "m" (dptr[z][d+96]));
asm volatile("vpcmpgtb %ymm4,%ymm1,%ymm5");
asm volatile("vpcmpgtb %ymm6,%ymm1,%ymm7");
asm volatile("vpcmpgtb %ymm12,%ymm1,%ymm13");
asm volatile("vpcmpgtb %ymm14,%ymm1,%ymm15");
asm volatile("vpaddb %ymm4,%ymm4,%ymm4");
asm volatile("vpaddb %ymm6,%ymm6,%ymm6");
asm volatile("vpaddb %ymm12,%ymm12,%ymm12");
asm volatile("vpaddb %ymm14,%ymm14,%ymm14");
asm volatile("vpand %ymm0,%ymm5,%ymm5");
asm volatile("vpand %ymm0,%ymm7,%ymm7");
asm volatile("vpand %ymm0,%ymm13,%ymm13");
asm volatile("vpand %ymm0,%ymm15,%ymm15");
asm volatile("vpxor %ymm5,%ymm4,%ymm4");
asm volatile("vpxor %ymm7,%ymm6,%ymm6");
asm volatile("vpxor %ymm13,%ymm12,%ymm12");
asm volatile("vpxor %ymm15,%ymm14,%ymm14");
asm volatile("vmovdqa %0,%%ymm5" : : "m" (dptr[z][d]));
asm volatile("vmovdqa %0,%%ymm7" : : "m" (dptr[z][d+32]));
asm volatile("vmovdqa %0,%%ymm13" : : "m" (dptr[z][d+64]));
asm volatile("vmovdqa %0,%%ymm15" : : "m" (dptr[z][d+96]));
asm volatile("vpxor %ymm5,%ymm2,%ymm2");
asm volatile("vpxor %ymm7,%ymm3,%ymm3");
asm volatile("vpxor %ymm13,%ymm10,%ymm10");
asm volatile("vpxor %ymm15,%ymm11,%ymm11");
asm volatile("vpxor %ymm5,%ymm4,%ymm4");
asm volatile("vpxor %ymm7,%ymm6,%ymm6");
asm volatile("vpxor %ymm13,%ymm12,%ymm12");
asm volatile("vpxor %ymm15,%ymm14,%ymm14");
}
asm volatile("vmovntdq %%ymm2,%0" : "=m" (p[d]));
asm volatile("vpxor %ymm2,%ymm2,%ymm2");
asm volatile("vmovntdq %%ymm3,%0" : "=m" (p[d+32]));
asm volatile("vpxor %ymm3,%ymm3,%ymm3");
asm volatile("vmovntdq %%ymm10,%0" : "=m" (p[d+64]));
asm volatile("vpxor %ymm10,%ymm10,%ymm10");
asm volatile("vmovntdq %%ymm11,%0" : "=m" (p[d+96]));
asm volatile("vpxor %ymm11,%ymm11,%ymm11");
asm volatile("vmovntdq %%ymm4,%0" : "=m" (q[d]));
asm volatile("vpxor %ymm4,%ymm4,%ymm4");
asm volatile("vmovntdq %%ymm6,%0" : "=m" (q[d+32]));
asm volatile("vpxor %ymm6,%ymm6,%ymm6");
asm volatile("vmovntdq %%ymm12,%0" : "=m" (q[d+64]));
asm volatile("vpxor %ymm12,%ymm12,%ymm12");
asm volatile("vmovntdq %%ymm14,%0" : "=m" (q[d+96]));
asm volatile("vpxor %ymm14,%ymm14,%ymm14");
}
asm volatile("sfence" : : : "memory");
kernel_fpu_end();
}
const struct raid6_calls raid6_avx2x4 = {
raid6_avx24_gen_syndrome,
raid6_have_avx2,
"avx2x4",
1 /* Has cache hints */
};
#endif
#endif /* CONFIG_AS_AVX2 */

2
lib/raid6/mmx.c
View File

@ -16,7 +16,7 @@
* MMX implementation of RAID-6 syndrome functions
*/
#if defined(__i386__) && !defined(__arch_um__)
#ifdef CONFIG_X86_32
#include <linux/raid/pq.h>
#include "x86.h"

323
lib/raid6/recov_avx2.c Normal file
View File

@ -0,0 +1,323 @@
/*
* Copyright (C) 2012 Intel Corporation
* Author: Jim Kukunas <james.t.kukunas@linux.intel.com>
*
* 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; version 2
* of the License.
*/
#if CONFIG_AS_AVX2
#include <linux/raid/pq.h>
#include "x86.h"
static int raid6_has_avx2(void)
{
return boot_cpu_has(X86_FEATURE_AVX2) &&
boot_cpu_has(X86_FEATURE_AVX);
}
static void raid6_2data_recov_avx2(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) */
const u8 x0f = 0x0f;
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] = (void *)raid6_empty_zero_page;
ptrs[disks-2] = dp;
dq = (u8 *)ptrs[failb];
ptrs[failb] = (void *)raid6_empty_zero_page;
ptrs[disks-1] = dq;
raid6_call.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]]];
kernel_fpu_begin();
/* ymm0 = x0f[16] */
asm volatile("vpbroadcastb %0, %%ymm7" : : "m" (x0f));
while (bytes) {
#ifdef CONFIG_X86_64
asm volatile("vmovdqa %0, %%ymm1" : : "m" (q[0]));
asm volatile("vmovdqa %0, %%ymm9" : : "m" (q[32]));
asm volatile("vmovdqa %0, %%ymm0" : : "m" (p[0]));
asm volatile("vmovdqa %0, %%ymm8" : : "m" (p[32]));
asm volatile("vpxor %0, %%ymm1, %%ymm1" : : "m" (dq[0]));
asm volatile("vpxor %0, %%ymm9, %%ymm9" : : "m" (dq[32]));
asm volatile("vpxor %0, %%ymm0, %%ymm0" : : "m" (dp[0]));
asm volatile("vpxor %0, %%ymm8, %%ymm8" : : "m" (dp[32]));
/*
* 1 = dq[0] ^ q[0]
* 9 = dq[32] ^ q[32]
* 0 = dp[0] ^ p[0]
* 8 = dp[32] ^ p[32]
*/
asm volatile("vbroadcasti128 %0, %%ymm4" : : "m" (qmul[0]));
asm volatile("vbroadcasti128 %0, %%ymm5" : : "m" (qmul[16]));
asm volatile("vpsraw $4, %ymm1, %ymm3");
asm volatile("vpsraw $4, %ymm9, %ymm12");
asm volatile("vpand %ymm7, %ymm1, %ymm1");
asm volatile("vpand %ymm7, %ymm9, %ymm9");
asm volatile("vpand %ymm7, %ymm3, %ymm3");
asm volatile("vpand %ymm7, %ymm12, %ymm12");
asm volatile("vpshufb %ymm9, %ymm4, %ymm14");
asm volatile("vpshufb %ymm1, %ymm4, %ymm4");
asm volatile("vpshufb %ymm12, %ymm5, %ymm15");
asm volatile("vpshufb %ymm3, %ymm5, %ymm5");
asm volatile("vpxor %ymm14, %ymm15, %ymm15");
asm volatile("vpxor %ymm4, %ymm5, %ymm5");
/*
* 5 = qx[0]
* 15 = qx[32]
*/
asm volatile("vbroadcasti128 %0, %%ymm4" : : "m" (pbmul[0]));
asm volatile("vbroadcasti128 %0, %%ymm1" : : "m" (pbmul[16]));
asm volatile("vpsraw $4, %ymm0, %ymm2");
asm volatile("vpsraw $4, %ymm8, %ymm6");
asm volatile("vpand %ymm7, %ymm0, %ymm3");
asm volatile("vpand %ymm7, %ymm8, %ymm14");
asm volatile("vpand %ymm7, %ymm2, %ymm2");
asm volatile("vpand %ymm7, %ymm6, %ymm6");
asm volatile("vpshufb %ymm14, %ymm4, %ymm12");
asm volatile("vpshufb %ymm3, %ymm4, %ymm4");
asm volatile("vpshufb %ymm6, %ymm1, %ymm13");
asm volatile("vpshufb %ymm2, %ymm1, %ymm1");
asm volatile("vpxor %ymm4, %ymm1, %ymm1");
asm volatile("vpxor %ymm12, %ymm13, %ymm13");
/*
* 1 = pbmul[px[0]]
* 13 = pbmul[px[32]]
*/
asm volatile("vpxor %ymm5, %ymm1, %ymm1");
asm volatile("vpxor %ymm15, %ymm13, %ymm13");
/*
* 1 = db = DQ
* 13 = db[32] = DQ[32]
*/
asm volatile("vmovdqa %%ymm1, %0" : "=m" (dq[0]));
asm volatile("vmovdqa %%ymm13,%0" : "=m" (dq[32]));
asm volatile("vpxor %ymm1, %ymm0, %ymm0");
asm volatile("vpxor %ymm13, %ymm8, %ymm8");
asm volatile("vmovdqa %%ymm0, %0" : "=m" (dp[0]));
asm volatile("vmovdqa %%ymm8, %0" : "=m" (dp[32]));
bytes -= 64;
p += 64;
q += 64;
dp += 64;
dq += 64;
#else
asm volatile("vmovdqa %0, %%ymm1" : : "m" (*q));
asm volatile("vmovdqa %0, %%ymm0" : : "m" (*p));
asm volatile("vpxor %0, %%ymm1, %%ymm1" : : "m" (*dq));
asm volatile("vpxor %0, %%ymm0, %%ymm0" : : "m" (*dp));
/* 1 = dq ^ q; 0 = dp ^ p */
asm volatile("vbroadcasti128 %0, %%ymm4" : : "m" (qmul[0]));
asm volatile("vbroadcasti128 %0, %%ymm5" : : "m" (qmul[16]));
/*
* 1 = dq ^ q
* 3 = dq ^ p >> 4
*/
asm volatile("vpsraw $4, %ymm1, %ymm3");
asm volatile("vpand %ymm7, %ymm1, %ymm1");
asm volatile("vpand %ymm7, %ymm3, %ymm3");
asm volatile("vpshufb %ymm1, %ymm4, %ymm4");
asm volatile("vpshufb %ymm3, %ymm5, %ymm5");
asm volatile("vpxor %ymm4, %ymm5, %ymm5");
/* 5 = qx */
asm volatile("vbroadcasti128 %0, %%ymm4" : : "m" (pbmul[0]));
asm volatile("vbroadcasti128 %0, %%ymm1" : : "m" (pbmul[16]));
asm volatile("vpsraw $4, %ymm0, %ymm2");
asm volatile("vpand %ymm7, %ymm0, %ymm3");
asm volatile("vpand %ymm7, %ymm2, %ymm2");
asm volatile("vpshufb %ymm3, %ymm4, %ymm4");
asm volatile("vpshufb %ymm2, %ymm1, %ymm1");
asm volatile("vpxor %ymm4, %ymm1, %ymm1");
/* 1 = pbmul[px] */
asm volatile("vpxor %ymm5, %ymm1, %ymm1");
/* 1 = db = DQ */
asm volatile("vmovdqa %%ymm1, %0" : "=m" (dq[0]));
asm volatile("vpxor %ymm1, %ymm0, %ymm0");
asm volatile("vmovdqa %%ymm0, %0" : "=m" (dp[0]));
bytes -= 32;
p += 32;
q += 32;
dp += 32;
dq += 32;
#endif
}
kernel_fpu_end();
}
static void raid6_datap_recov_avx2(int disks, size_t bytes, int faila,
void **ptrs)
{
u8 *p, *q, *dq;
const u8 *qmul; /* Q multiplier table */
const u8 x0f = 0x0f;
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] = (void *)raid6_empty_zero_page;
ptrs[disks-1] = dq;
raid6_call.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]]];
kernel_fpu_begin();
asm volatile("vpbroadcastb %0, %%ymm7" : : "m" (x0f));
while (bytes) {
#ifdef CONFIG_X86_64
asm volatile("vmovdqa %0, %%ymm3" : : "m" (dq[0]));
asm volatile("vmovdqa %0, %%ymm8" : : "m" (dq[32]));
asm volatile("vpxor %0, %%ymm3, %%ymm3" : : "m" (q[0]));
asm volatile("vpxor %0, %%ymm8, %%ymm8" : : "m" (q[32]));
/*
* 3 = q[0] ^ dq[0]
* 8 = q[32] ^ dq[32]
*/
asm volatile("vbroadcasti128 %0, %%ymm0" : : "m" (qmul[0]));
asm volatile("vmovapd %ymm0, %ymm13");
asm volatile("vbroadcasti128 %0, %%ymm1" : : "m" (qmul[16]));
asm volatile("vmovapd %ymm1, %ymm14");
asm volatile("vpsraw $4, %ymm3, %ymm6");
asm volatile("vpsraw $4, %ymm8, %ymm12");
asm volatile("vpand %ymm7, %ymm3, %ymm3");
asm volatile("vpand %ymm7, %ymm8, %ymm8");
asm volatile("vpand %ymm7, %ymm6, %ymm6");
asm volatile("vpand %ymm7, %ymm12, %ymm12");
asm volatile("vpshufb %ymm3, %ymm0, %ymm0");
asm volatile("vpshufb %ymm8, %ymm13, %ymm13");
asm volatile("vpshufb %ymm6, %ymm1, %ymm1");
asm volatile("vpshufb %ymm12, %ymm14, %ymm14");
asm volatile("vpxor %ymm0, %ymm1, %ymm1");
asm volatile("vpxor %ymm13, %ymm14, %ymm14");
/*
* 1 = qmul[q[0] ^ dq[0]]
* 14 = qmul[q[32] ^ dq[32]]
*/
asm volatile("vmovdqa %0, %%ymm2" : : "m" (p[0]));
asm volatile("vmovdqa %0, %%ymm12" : : "m" (p[32]));
asm volatile("vpxor %ymm1, %ymm2, %ymm2");
asm volatile("vpxor %ymm14, %ymm12, %ymm12");
/*
* 2 = p[0] ^ qmul[q[0] ^ dq[0]]
* 12 = p[32] ^ qmul[q[32] ^ dq[32]]
*/
asm volatile("vmovdqa %%ymm1, %0" : "=m" (dq[0]));
asm volatile("vmovdqa %%ymm14, %0" : "=m" (dq[32]));
asm volatile("vmovdqa %%ymm2, %0" : "=m" (p[0]));
asm volatile("vmovdqa %%ymm12,%0" : "=m" (p[32]));
bytes -= 64;
p += 64;
q += 64;
dq += 64;
#else
asm volatile("vmovdqa %0, %%ymm3" : : "m" (dq[0]));
asm volatile("vpxor %0, %%ymm3, %%ymm3" : : "m" (q[0]));
/* 3 = q ^ dq */
asm volatile("vbroadcasti128 %0, %%ymm0" : : "m" (qmul[0]));
asm volatile("vbroadcasti128 %0, %%ymm1" : : "m" (qmul[16]));
asm volatile("vpsraw $4, %ymm3, %ymm6");
asm volatile("vpand %ymm7, %ymm3, %ymm3");
asm volatile("vpand %ymm7, %ymm6, %ymm6");
asm volatile("vpshufb %ymm3, %ymm0, %ymm0");
asm volatile("vpshufb %ymm6, %ymm1, %ymm1");
asm volatile("vpxor %ymm0, %ymm1, %ymm1");
/* 1 = qmul[q ^ dq] */
asm volatile("vmovdqa %0, %%ymm2" : : "m" (p[0]));
asm volatile("vpxor %ymm1, %ymm2, %ymm2");
/* 2 = p ^ qmul[q ^ dq] */
asm volatile("vmovdqa %%ymm1, %0" : "=m" (dq[0]));
asm volatile("vmovdqa %%ymm2, %0" : "=m" (p[0]));
bytes -= 32;
p += 32;
q += 32;
dq += 32;
#endif
}
kernel_fpu_end();
}
const struct raid6_recov_calls raid6_recov_avx2 = {
.data2 = raid6_2data_recov_avx2,
.datap = raid6_datap_recov_avx2,
.valid = raid6_has_avx2,
#ifdef CONFIG_X86_64
.name = "avx2x2",
#else
.name = "avx2x1",
#endif
.priority = 2,
};
#else
#warning "your version of binutils lacks AVX2 support"
#endif

4
lib/raid6/recov_ssse3.c
View File

@ -7,8 +7,6 @@
* of the License.
*/
#if (defined(__i386__) || defined(__x86_64__)) && !defined(__arch_um__)
#include <linux/raid/pq.h>
#include "x86.h"
@ -332,5 +330,3 @@ const struct raid6_recov_calls raid6_recov_ssse3 = {
#endif
.priority = 1,
};
#endif

2
lib/raid6/sse1.c
View File

@ -21,7 +21,7 @@
* worthwhile as a separate implementation.
*/
#if defined(__i386__) && !defined(__arch_um__)
#ifdef CONFIG_X86_32
#include <linux/raid/pq.h>
#include "x86.h"

8
lib/raid6/sse2.c
View File

@ -17,8 +17,6 @@
*
*/
#if (defined(__i386__) || defined(__x86_64__)) && !defined(__arch_um__)
#include <linux/raid/pq.h>
#include "x86.h"
@ -159,9 +157,7 @@ const struct raid6_calls raid6_sse2x2 = {
1 /* Has cache hints */
};
#endif
#if defined(__x86_64__) && !defined(__arch_um__)
#ifdef CONFIG_X86_64
/*
* Unrolled-by-4 SSE2 implementation
@ -259,4 +255,4 @@ const struct raid6_calls raid6_sse2x4 = {
1 /* Has cache hints */
};
#endif
#endif /* CONFIG_X86_64 */

29
lib/raid6/test/Makefile
View File

@ -10,6 +10,31 @@ LD = ld
AWK = awk -f
AR = ar
RANLIB = ranlib
OBJS = int1.o int2.o int4.o int8.o int16.o int32.o recov.o algos.o tables.o
ARCH := $(shell uname -m 2>/dev/null | sed -e /s/i.86/i386/)
ifeq ($(ARCH),i386)
CFLAGS += -DCONFIG_X86_32
IS_X86 = yes
endif
ifeq ($(ARCH),x86_64)
CFLAGS += -DCONFIG_X86_64
IS_X86 = yes
endif
ifeq ($(IS_X86),yes)
OBJS += mmx.o sse1.o sse2.o avx2.o recov_ssse3.o recov_avx2.o
CFLAGS += $(shell echo "vpbroadcastb %xmm0, %ymm1" | \
gcc -c -x assembler - >&/dev/null && \
rm ./-.o && echo -DCONFIG_AS_AVX2=1)
else
HAS_ALTIVEC := $(shell echo -e '\#include <altivec.h>\nvector int a;' |\
gcc -c -x c - >&/dev/null && \
rm ./-.o && echo yes)
ifeq ($(HAS_ALTIVEC),yes)
OBJS += altivec1.o altivec2.o altivec4.o altivec8.o
endif
endif
.c.o:
$(CC) $(CFLAGS) -c -o $@ $<
@ -22,9 +47,7 @@ RANLIB = ranlib
all: raid6.a raid6test
raid6.a: int1.o int2.o int4.o int8.o int16.o int32.o mmx.o sse1.o sse2.o \
altivec1.o altivec2.o altivec4.o altivec8.o recov.o recov_ssse3.o algos.o \
tables.o
raid6.a: $(OBJS)
rm -f $@
$(AR) cq $@ $^
$(RANLIB) $@

14
lib/raid6/x86.h
View File

@ -45,19 +45,23 @@ static inline void kernel_fpu_end(void)
#define X86_FEATURE_XMM3 (4*32+ 0) /* "pni" SSE-3 */
#define X86_FEATURE_SSSE3 (4*32+ 9) /* Supplemental SSE-3 */
#define X86_FEATURE_AVX (4*32+28) /* Advanced Vector Extensions */
#define X86_FEATURE_AVX2 (9*32+ 5) /* AVX2 instructions */
#define X86_FEATURE_MMXEXT (1*32+22) /* AMD MMX extensions */
/* Should work well enough on modern CPUs for testing */
static inline int boot_cpu_has(int flag)
{
u32 eax = (flag & 0x20) ? 0x80000001 : 1;
u32 ecx, edx;
u32 eax, ebx, ecx, edx;
eax = (flag & 0x100) ? 7 :
(flag & 0x20) ? 0x80000001 : 1;
ecx = 0;
asm volatile("cpuid"
: "+a" (eax), "=d" (edx), "=c" (ecx)
: : "ebx");
: "+a" (eax), "=b" (ebx), "=d" (edx), "+c" (ecx));
return ((flag & 0x80 ? ecx : edx) >> (flag & 31)) & 1;
return ((flag & 0x100 ? ebx :
(flag & 0x80) ? ecx : edx) >> (flag & 31)) & 1;
}
#endif /* ndef __KERNEL__ */