Commit 647c734f authored by Raphael Moreira Zinsly's avatar Raphael Moreira Zinsly Committed by Michael Ellerman

selftests/powerpc: Add NX-GZIP engine compress testcase

Add a compression testcase for the powerpc NX-GZIP engine.
Signed-off-by: default avatarBulent Abali <abali@us.ibm.com>
Signed-off-by: default avatarRaphael Moreira Zinsly <rzinsly@linux.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200420205538.25181-4-rzinsly@linux.ibm.com
parent f49b7572
...@@ -19,6 +19,7 @@ SUB_DIRS = alignment \ ...@@ -19,6 +19,7 @@ SUB_DIRS = alignment \
copyloops \ copyloops \
dscr \ dscr \
mm \ mm \
nx-gzip \
pmu \ pmu \
signal \ signal \
primitives \ primitives \
......
CFLAGS = -O3 -m64 -I./include
TEST_GEN_FILES := gzfht_test
TEST_PROGS := nx-gzip-test.sh
include ../../lib.mk
$(TEST_GEN_FILES): gzip_vas.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright 2020 IBM Corp.
*
* Author: Bulent Abali <abali@us.ibm.com>
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdint.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/fcntl.h>
#include <sys/mman.h>
#include <endian.h>
#include <bits/endian.h>
#include <sys/ioctl.h>
#include <assert.h>
#include <errno.h>
#include <signal.h>
#include "vas-api.h"
#include "nx.h"
#include "copy-paste.h"
#include "nxu.h"
#include "nx_dbg.h"
#include <sys/platform/ppc.h>
#define barrier()
#define hwsync() ({ asm volatile("sync" ::: "memory"); })
#ifndef NX_NO_CPU_PRI
#define cpu_pri_default() ({ asm volatile ("or 2, 2, 2"); })
#define cpu_pri_low() ({ asm volatile ("or 31, 31, 31"); })
#else
#define cpu_pri_default()
#define cpu_pri_low()
#endif
void *nx_fault_storage_address;
struct nx_handle {
int fd;
int function;
void *paste_addr;
};
static int open_device_nodes(char *devname, int pri, struct nx_handle *handle)
{
int rc, fd;
void *addr;
struct vas_tx_win_open_attr txattr;
fd = open(devname, O_RDWR);
if (fd < 0) {
fprintf(stderr, " open device name %s\n", devname);
return -errno;
}
memset(&txattr, 0, sizeof(txattr));
txattr.version = 1;
txattr.vas_id = pri;
rc = ioctl(fd, VAS_TX_WIN_OPEN, (unsigned long)&txattr);
if (rc < 0) {
fprintf(stderr, "ioctl() n %d, error %d\n", rc, errno);
rc = -errno;
goto out;
}
addr = mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0ULL);
if (addr == MAP_FAILED) {
fprintf(stderr, "mmap() failed, errno %d\n", errno);
rc = -errno;
goto out;
}
handle->fd = fd;
handle->paste_addr = (void *)((char *)addr + 0x400);
rc = 0;
out:
close(fd);
return rc;
}
void *nx_function_begin(int function, int pri)
{
int rc;
char *devname = "/dev/crypto/nx-gzip";
struct nx_handle *nxhandle;
if (function != NX_FUNC_COMP_GZIP) {
errno = EINVAL;
fprintf(stderr, " NX_FUNC_COMP_GZIP not found\n");
return NULL;
}
nxhandle = malloc(sizeof(*nxhandle));
if (!nxhandle) {
errno = ENOMEM;
fprintf(stderr, " No memory\n");
return NULL;
}
nxhandle->function = function;
rc = open_device_nodes(devname, pri, nxhandle);
if (rc < 0) {
errno = -rc;
fprintf(stderr, " open_device_nodes failed\n");
return NULL;
}
return nxhandle;
}
int nx_function_end(void *handle)
{
int rc = 0;
struct nx_handle *nxhandle = handle;
rc = munmap(nxhandle->paste_addr - 0x400, 4096);
if (rc < 0) {
fprintf(stderr, "munmap() failed, errno %d\n", errno);
return rc;
}
close(nxhandle->fd);
free(nxhandle);
return rc;
}
static int nx_wait_for_csb(struct nx_gzip_crb_cpb_t *cmdp)
{
long poll = 0;
uint64_t t;
/* Save power and let other threads use the h/w. top may show
* 100% but only because OS doesn't know we slowed the this
* h/w thread while polling. We're letting other threads have
* higher throughput on the core.
*/
cpu_pri_low();
#define CSB_MAX_POLL 200000000UL
#define USLEEP_TH 300000UL
t = __ppc_get_timebase();
while (getnn(cmdp->crb.csb, csb_v) == 0) {
++poll;
hwsync();
cpu_pri_low();
/* usleep(0) takes around 29000 ticks ~60 us.
* 300000 is spinning for about 600 us then
* start sleeping.
*/
if ((__ppc_get_timebase() - t) > USLEEP_TH) {
cpu_pri_default();
usleep(1);
}
if (poll > CSB_MAX_POLL)
break;
/* Fault address from signal handler */
if (nx_fault_storage_address) {
cpu_pri_default();
return -EAGAIN;
}
}
cpu_pri_default();
/* hw has updated csb and output buffer */
hwsync();
/* Check CSB flags. */
if (getnn(cmdp->crb.csb, csb_v) == 0) {
fprintf(stderr, "CSB still not valid after %d polls.\n",
(int) poll);
prt_err("CSB still not valid after %d polls, giving up.\n",
(int) poll);
return -ETIMEDOUT;
}
return 0;
}
static int nxu_run_job(struct nx_gzip_crb_cpb_t *cmdp, void *handle)
{
int i, ret, retries;
struct nx_handle *nxhandle = handle;
assert(handle != NULL);
i = 0;
retries = 5000;
while (i++ < retries) {
hwsync();
vas_copy(&cmdp->crb, 0);
ret = vas_paste(nxhandle->paste_addr, 0);
hwsync();
NXPRT(fprintf(stderr, "Paste attempt %d/%d returns 0x%x\n",
i, retries, ret));
if ((ret == 2) || (ret == 3)) {
ret = nx_wait_for_csb(cmdp);
if (!ret) {
goto out;
} else if (ret == -EAGAIN) {
long x;
prt_err("Touching address %p, 0x%lx\n",
nx_fault_storage_address,
*(long *) nx_fault_storage_address);
x = *(long *) nx_fault_storage_address;
*(long *) nx_fault_storage_address = x;
nx_fault_storage_address = 0;
continue;
} else {
prt_err("wait_for_csb() returns %d\n", ret);
break;
}
} else {
if (i < 10) {
/* spin for few ticks */
#define SPIN_TH 500UL
uint64_t fail_spin;
fail_spin = __ppc_get_timebase();
while ((__ppc_get_timebase() - fail_spin) <
SPIN_TH)
;
} else {
/* sleep */
unsigned int pr = 0;
if (pr++ % 100 == 0) {
prt_err("Paste attempt %d/", i);
prt_err("%d, failed pid= %d\n", retries,
getpid());
}
usleep(1);
}
continue;
}
}
out:
cpu_pri_default();
return ret;
}
int nxu_submit_job(struct nx_gzip_crb_cpb_t *cmdp, void *handle)
{
int cc;
cc = nxu_run_job(cmdp, handle);
if (!cc)
cc = getnn(cmdp->crb.csb, csb_cc); /* CC Table 6-8 */
return cc;
}
void nxu_sigsegv_handler(int sig, siginfo_t *info, void *ctx)
{
fprintf(stderr, "%d: Got signal %d si_code %d, si_addr %p\n", getpid(),
sig, info->si_code, info->si_addr);
nx_fault_storage_address = info->si_addr;
}
/*
* Fault in pages prior to NX job submission. wr=1 may be required to
* touch writeable pages. System zero pages do not fault-in the page as
* intended. Typically set wr=1 for NX target pages and set wr=0 for NX
* source pages.
*/
int nxu_touch_pages(void *buf, long buf_len, long page_len, int wr)
{
char *begin = buf;
char *end = (char *) buf + buf_len - 1;
volatile char t;
assert(buf_len >= 0 && !!buf);
NXPRT(fprintf(stderr, "touch %p %p len 0x%lx wr=%d\n", buf,
(buf + buf_len), buf_len, wr));
if (buf_len <= 0 || buf == NULL)
return -1;
do {
t = *begin;
if (wr)
*begin = t;
begin = begin + page_len;
} while (begin < end);
/* When buf_sz is small or buf tail is in another page */
t = *end;
if (wr)
*end = t;
return 0;
}
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0-or-later
if [[ ! -w /dev/crypto/nx-gzip ]]; then
echo "Can't access /dev/crypto/nx-gzip, skipping"
echo "skip: $0"
exit 4
fi
set -e
function cleanup
{
rm -f nx-tempfile*
}
trap cleanup EXIT
function test_sizes
{
local n=$1
local fname="nx-tempfile.$n"
for size in 4K 64K 1M 64M
do
echo "Testing $size ($n) ..."
dd if=/dev/urandom of=$fname bs=$size count=1
./gzfht_test $fname
done
}
echo "Doing basic test of different sizes ..."
test_sizes 0
echo "Running tests in parallel ..."
for i in {1..16}
do
test_sizes $i &
done
wait
echo "OK"
exit 0
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