88b00b4658
The new flag, -c <period>, sets the interrupt coalescing period in microseconds through the new ioat(4) API ioat_set_interrupt_coalesce(). Also add a -z flag to zero ioat statistics before tests, to make it easy to measure results. Sponsored by: EMC / Isilon Storage Division
594 lines
14 KiB
C
594 lines
14 KiB
C
/*-
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* Copyright (C) 2012 Intel Corporation
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/ioccom.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/rman.h>
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#include <sys/sysctl.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <machine/stdarg.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/pmap.h>
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#include "ioat.h"
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#include "ioat_hw.h"
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#include "ioat_internal.h"
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#include "ioat_test.h"
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#ifndef time_after
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#define time_after(a,b) ((long)(b) - (long)(a) < 0)
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#endif
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MALLOC_DEFINE(M_IOAT_TEST, "ioat_test", "ioat test allocations");
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#define IOAT_MAX_BUFS 256
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struct test_transaction {
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void *buf[IOAT_MAX_BUFS];
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uint32_t length;
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uint32_t depth;
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struct ioat_test *test;
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TAILQ_ENTRY(test_transaction) entry;
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};
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#define IT_LOCK() mtx_lock(&ioat_test_lk)
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#define IT_UNLOCK() mtx_unlock(&ioat_test_lk)
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#define IT_ASSERT() mtx_assert(&ioat_test_lk, MA_OWNED)
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static struct mtx ioat_test_lk;
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MTX_SYSINIT(ioat_test_lk, &ioat_test_lk, "test coordination mtx", MTX_DEF);
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static int g_thread_index = 1;
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static struct cdev *g_ioat_cdev = NULL;
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#define ioat_test_log(v, ...) _ioat_test_log((v), "ioat_test: " __VA_ARGS__)
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static inline void _ioat_test_log(int verbosity, const char *fmt, ...);
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static void
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ioat_test_transaction_destroy(struct test_transaction *tx)
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{
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struct ioat_test *test;
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int i;
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test = tx->test;
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for (i = 0; i < IOAT_MAX_BUFS; i++) {
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if (tx->buf[i] != NULL) {
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if (test->testkind == IOAT_TEST_DMA_8K)
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free(tx->buf[i], M_IOAT_TEST);
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else
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contigfree(tx->buf[i], tx->length, M_IOAT_TEST);
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tx->buf[i] = NULL;
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}
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}
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free(tx, M_IOAT_TEST);
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}
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static struct
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test_transaction *ioat_test_transaction_create(struct ioat_test *test,
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unsigned num_buffers)
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{
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struct test_transaction *tx;
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unsigned i;
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tx = malloc(sizeof(*tx), M_IOAT_TEST, M_NOWAIT | M_ZERO);
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if (tx == NULL)
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return (NULL);
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tx->length = test->buffer_size;
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for (i = 0; i < num_buffers; i++) {
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if (test->testkind == IOAT_TEST_DMA_8K)
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tx->buf[i] = malloc(test->buffer_size, M_IOAT_TEST,
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M_NOWAIT);
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else
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tx->buf[i] = contigmalloc(test->buffer_size,
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M_IOAT_TEST, M_NOWAIT, 0, BUS_SPACE_MAXADDR,
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PAGE_SIZE, 0);
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if (tx->buf[i] == NULL) {
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ioat_test_transaction_destroy(tx);
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return (NULL);
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}
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}
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return (tx);
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}
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static void
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dump_hex(void *p, size_t chunks)
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{
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size_t i, j;
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for (i = 0; i < chunks; i++) {
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for (j = 0; j < 8; j++)
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printf("%08x ", ((uint32_t *)p)[i * 8 + j]);
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printf("\n");
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}
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}
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static bool
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ioat_compare_ok(struct test_transaction *tx)
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{
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struct ioat_test *test;
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char *dst, *src;
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uint32_t i, j;
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test = tx->test;
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for (i = 0; i < tx->depth; i++) {
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dst = tx->buf[2 * i + 1];
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src = tx->buf[2 * i];
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if (test->testkind == IOAT_TEST_FILL) {
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for (j = 0; j < tx->length; j += sizeof(uint64_t)) {
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if (memcmp(src, &dst[j],
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MIN(sizeof(uint64_t), tx->length - j))
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!= 0)
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return (false);
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}
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} else if (test->testkind == IOAT_TEST_DMA) {
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if (memcmp(src, dst, tx->length) != 0)
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return (false);
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} else if (test->testkind == IOAT_TEST_RAW_DMA) {
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if (test->raw_write)
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dst = test->raw_vtarget;
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dump_hex(dst, tx->length / 32);
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}
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}
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return (true);
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}
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static void
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ioat_dma_test_callback(void *arg, int error)
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{
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struct test_transaction *tx;
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struct ioat_test *test;
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if (error != 0)
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ioat_test_log(0, "%s: Got error: %d\n", __func__, error);
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tx = arg;
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test = tx->test;
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if (test->verify && !ioat_compare_ok(tx)) {
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ioat_test_log(0, "miscompare found\n");
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atomic_add_32(&test->status[IOAT_TEST_MISCOMPARE], tx->depth);
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} else if (!test->too_late)
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atomic_add_32(&test->status[IOAT_TEST_OK], tx->depth);
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IT_LOCK();
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TAILQ_REMOVE(&test->pend_q, tx, entry);
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TAILQ_INSERT_TAIL(&test->free_q, tx, entry);
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wakeup(&test->free_q);
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IT_UNLOCK();
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}
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static int
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ioat_test_prealloc_memory(struct ioat_test *test, int index)
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{
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uint32_t i, j, k;
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struct test_transaction *tx;
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for (i = 0; i < test->transactions; i++) {
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tx = ioat_test_transaction_create(test, test->chain_depth * 2);
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if (tx == NULL) {
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ioat_test_log(0, "tx == NULL - memory exhausted\n");
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test->status[IOAT_TEST_NO_MEMORY]++;
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return (ENOMEM);
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}
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TAILQ_INSERT_HEAD(&test->free_q, tx, entry);
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tx->test = test;
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tx->depth = test->chain_depth;
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/* fill in source buffers */
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for (j = 0; j < (tx->length / sizeof(uint32_t)); j++) {
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uint32_t val = j + (index << 28);
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for (k = 0; k < test->chain_depth; k++) {
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((uint32_t *)tx->buf[2*k])[j] = ~val;
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((uint32_t *)tx->buf[2*k+1])[j] = val;
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}
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}
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}
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return (0);
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}
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static void
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ioat_test_release_memory(struct ioat_test *test)
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{
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struct test_transaction *tx, *s;
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TAILQ_FOREACH_SAFE(tx, &test->free_q, entry, s)
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ioat_test_transaction_destroy(tx);
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TAILQ_INIT(&test->free_q);
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TAILQ_FOREACH_SAFE(tx, &test->pend_q, entry, s)
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ioat_test_transaction_destroy(tx);
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TAILQ_INIT(&test->pend_q);
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}
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static void
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ioat_test_submit_1_tx(struct ioat_test *test, bus_dmaengine_t dma)
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{
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struct test_transaction *tx;
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struct bus_dmadesc *desc;
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bus_dmaengine_callback_t cb;
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bus_addr_t src, dest;
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uint64_t fillpattern;
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uint32_t i, flags;
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desc = NULL;
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IT_LOCK();
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while (TAILQ_EMPTY(&test->free_q))
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msleep(&test->free_q, &ioat_test_lk, 0, "test_submit", 0);
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tx = TAILQ_FIRST(&test->free_q);
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TAILQ_REMOVE(&test->free_q, tx, entry);
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TAILQ_INSERT_HEAD(&test->pend_q, tx, entry);
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IT_UNLOCK();
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if (test->testkind != IOAT_TEST_MEMCPY)
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ioat_acquire(dma);
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for (i = 0; i < tx->depth; i++) {
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if (test->testkind == IOAT_TEST_MEMCPY) {
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memcpy(tx->buf[2 * i + 1], tx->buf[2 * i], tx->length);
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if (i == tx->depth - 1)
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ioat_dma_test_callback(tx, 0);
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continue;
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}
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src = vtophys((vm_offset_t)tx->buf[2*i]);
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dest = vtophys((vm_offset_t)tx->buf[2*i+1]);
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if (test->testkind == IOAT_TEST_RAW_DMA) {
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if (test->raw_write)
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dest = test->raw_target;
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else
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src = test->raw_target;
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}
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if (i == tx->depth - 1) {
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cb = ioat_dma_test_callback;
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flags = DMA_INT_EN;
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} else {
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cb = NULL;
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flags = 0;
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}
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if (test->testkind == IOAT_TEST_DMA ||
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test->testkind == IOAT_TEST_RAW_DMA)
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desc = ioat_copy(dma, dest, src, tx->length, cb, tx,
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flags);
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else if (test->testkind == IOAT_TEST_FILL) {
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fillpattern = *(uint64_t *)tx->buf[2*i];
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desc = ioat_blockfill(dma, dest, fillpattern,
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tx->length, cb, tx, flags);
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} else if (test->testkind == IOAT_TEST_DMA_8K) {
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bus_addr_t src2, dst2;
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src2 = vtophys((vm_offset_t)tx->buf[2*i] + PAGE_SIZE);
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dst2 = vtophys((vm_offset_t)tx->buf[2*i+1] + PAGE_SIZE);
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desc = ioat_copy_8k_aligned(dma, dest, dst2, src, src2,
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cb, tx, flags);
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}
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if (desc == NULL)
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break;
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}
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if (test->testkind == IOAT_TEST_MEMCPY)
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return;
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ioat_release(dma);
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/*
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* We couldn't issue an IO -- either the device is being detached or
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* the HW reset. Essentially spin until the device comes back up or
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* our timer expires.
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*/
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if (desc == NULL && tx->depth > 0) {
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atomic_add_32(&test->status[IOAT_TEST_NO_DMA_ENGINE], tx->depth);
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IT_LOCK();
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TAILQ_REMOVE(&test->pend_q, tx, entry);
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TAILQ_INSERT_HEAD(&test->free_q, tx, entry);
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IT_UNLOCK();
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}
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}
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static void
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ioat_dma_test(void *arg)
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{
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struct ioat_softc *ioat;
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struct ioat_test *test;
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bus_dmaengine_t dmaengine;
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uint32_t loops;
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int index, rc, start, end, error;
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test = arg;
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memset(__DEVOLATILE(void *, test->status), 0, sizeof(test->status));
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if (test->testkind == IOAT_TEST_DMA_8K &&
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test->buffer_size != 2 * PAGE_SIZE) {
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ioat_test_log(0, "Asked for 8k test and buffer size isn't 8k\n");
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test->status[IOAT_TEST_INVALID_INPUT]++;
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return;
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}
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if (test->buffer_size > 1024 * 1024) {
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ioat_test_log(0, "Buffer size too large >1MB\n");
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test->status[IOAT_TEST_NO_MEMORY]++;
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return;
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}
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if (test->chain_depth * 2 > IOAT_MAX_BUFS) {
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ioat_test_log(0, "Depth too large (> %u)\n",
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(unsigned)IOAT_MAX_BUFS / 2);
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test->status[IOAT_TEST_NO_MEMORY]++;
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return;
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}
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if (btoc((uint64_t)test->buffer_size * test->chain_depth *
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test->transactions) > (physmem / 4)) {
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ioat_test_log(0, "Sanity check failed -- test would "
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"use more than 1/4 of phys mem.\n");
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test->status[IOAT_TEST_NO_MEMORY]++;
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return;
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}
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if ((uint64_t)test->transactions * test->chain_depth > (1<<16)) {
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ioat_test_log(0, "Sanity check failed -- test would "
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"use more than available IOAT ring space.\n");
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test->status[IOAT_TEST_NO_MEMORY]++;
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return;
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}
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if (test->testkind >= IOAT_NUM_TESTKINDS) {
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ioat_test_log(0, "Invalid kind %u\n",
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(unsigned)test->testkind);
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test->status[IOAT_TEST_INVALID_INPUT]++;
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return;
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}
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dmaengine = ioat_get_dmaengine(test->channel_index);
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if (dmaengine == NULL) {
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ioat_test_log(0, "Couldn't acquire dmaengine\n");
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test->status[IOAT_TEST_NO_DMA_ENGINE]++;
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return;
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}
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ioat = to_ioat_softc(dmaengine);
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if (test->testkind == IOAT_TEST_FILL &&
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(ioat->capabilities & IOAT_DMACAP_BFILL) == 0)
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{
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ioat_test_log(0,
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"Hardware doesn't support block fill, aborting test\n");
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test->status[IOAT_TEST_INVALID_INPUT]++;
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goto out;
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}
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if (test->coalesce_period > ioat->intrdelay_max) {
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ioat_test_log(0,
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"Hardware doesn't support intrdelay of %u us.\n",
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(unsigned)test->coalesce_period);
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test->status[IOAT_TEST_INVALID_INPUT]++;
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goto out;
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}
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error = ioat_set_interrupt_coalesce(dmaengine, test->coalesce_period);
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if (error == ENODEV && test->coalesce_period == 0)
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error = 0;
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if (error != 0) {
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ioat_test_log(0, "ioat_set_interrupt_coalesce: %d\n", error);
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test->status[IOAT_TEST_INVALID_INPUT]++;
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goto out;
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}
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if (test->zero_stats)
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memset(&ioat->stats, 0, sizeof(ioat->stats));
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if (test->testkind == IOAT_TEST_RAW_DMA) {
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if (test->raw_is_virtual) {
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test->raw_vtarget = (void *)test->raw_target;
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test->raw_target = vtophys(test->raw_vtarget);
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} else {
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test->raw_vtarget = pmap_mapdev(test->raw_target,
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test->buffer_size);
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}
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}
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index = g_thread_index++;
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TAILQ_INIT(&test->free_q);
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TAILQ_INIT(&test->pend_q);
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if (test->duration == 0)
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ioat_test_log(1, "Thread %d: num_loops remaining: 0x%08x\n",
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index, test->transactions);
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else
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ioat_test_log(1, "Thread %d: starting\n", index);
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rc = ioat_test_prealloc_memory(test, index);
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if (rc != 0) {
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ioat_test_log(0, "prealloc_memory: %d\n", rc);
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goto out;
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}
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wmb();
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test->too_late = false;
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start = ticks;
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end = start + (((sbintime_t)test->duration * hz) / 1000);
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for (loops = 0;; loops++) {
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if (test->duration == 0 && loops >= test->transactions)
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break;
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else if (test->duration != 0 && time_after(ticks, end)) {
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test->too_late = true;
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break;
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}
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ioat_test_submit_1_tx(test, dmaengine);
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}
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ioat_test_log(1, "Test Elapsed: %d ticks (overrun %d), %d sec.\n",
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ticks - start, ticks - end, (ticks - start) / hz);
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IT_LOCK();
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while (!TAILQ_EMPTY(&test->pend_q))
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msleep(&test->free_q, &ioat_test_lk, 0, "ioattestcompl", hz);
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IT_UNLOCK();
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ioat_test_log(1, "Test Elapsed2: %d ticks (overrun %d), %d sec.\n",
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ticks - start, ticks - end, (ticks - start) / hz);
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ioat_test_release_memory(test);
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out:
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if (test->testkind == IOAT_TEST_RAW_DMA && !test->raw_is_virtual)
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pmap_unmapdev((vm_offset_t)test->raw_vtarget,
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test->buffer_size);
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ioat_put_dmaengine(dmaengine);
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}
|
|
|
|
static int
|
|
ioat_test_open(struct cdev *dev, int flags, int fmt, struct thread *td)
|
|
{
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
ioat_test_close(struct cdev *dev, int flags, int fmt, struct thread *td)
|
|
{
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
ioat_test_ioctl(struct cdev *dev, unsigned long cmd, caddr_t arg, int flag,
|
|
struct thread *td)
|
|
{
|
|
|
|
switch (cmd) {
|
|
case IOAT_DMATEST:
|
|
ioat_dma_test(arg);
|
|
break;
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static struct cdevsw ioat_cdevsw = {
|
|
.d_version = D_VERSION,
|
|
.d_flags = 0,
|
|
.d_open = ioat_test_open,
|
|
.d_close = ioat_test_close,
|
|
.d_ioctl = ioat_test_ioctl,
|
|
.d_name = "ioat_test",
|
|
};
|
|
|
|
static int
|
|
enable_ioat_test(bool enable)
|
|
{
|
|
|
|
mtx_assert(&Giant, MA_OWNED);
|
|
|
|
if (enable && g_ioat_cdev == NULL) {
|
|
g_ioat_cdev = make_dev(&ioat_cdevsw, 0, UID_ROOT, GID_WHEEL,
|
|
0600, "ioat_test");
|
|
} else if (!enable && g_ioat_cdev != NULL) {
|
|
destroy_dev(g_ioat_cdev);
|
|
g_ioat_cdev = NULL;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
sysctl_enable_ioat_test(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
int error, enabled;
|
|
|
|
enabled = (g_ioat_cdev != NULL);
|
|
error = sysctl_handle_int(oidp, &enabled, 0, req);
|
|
if (error != 0 || req->newptr == NULL)
|
|
return (error);
|
|
|
|
enable_ioat_test(enabled);
|
|
return (0);
|
|
}
|
|
SYSCTL_PROC(_hw_ioat, OID_AUTO, enable_ioat_test, CTLTYPE_INT | CTLFLAG_RW,
|
|
0, 0, sysctl_enable_ioat_test, "I",
|
|
"Non-zero: Enable the /dev/ioat_test device");
|
|
|
|
void
|
|
ioat_test_attach(void)
|
|
{
|
|
char *val;
|
|
|
|
val = kern_getenv("hw.ioat.enable_ioat_test");
|
|
if (val != NULL && strcmp(val, "0") != 0) {
|
|
mtx_lock(&Giant);
|
|
enable_ioat_test(true);
|
|
mtx_unlock(&Giant);
|
|
}
|
|
freeenv(val);
|
|
}
|
|
|
|
void
|
|
ioat_test_detach(void)
|
|
{
|
|
|
|
mtx_lock(&Giant);
|
|
enable_ioat_test(false);
|
|
mtx_unlock(&Giant);
|
|
}
|
|
|
|
static inline void
|
|
_ioat_test_log(int verbosity, const char *fmt, ...)
|
|
{
|
|
va_list argp;
|
|
|
|
if (verbosity > g_ioat_debug_level)
|
|
return;
|
|
|
|
va_start(argp, fmt);
|
|
vprintf(fmt, argp);
|
|
va_end(argp);
|
|
}
|