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/*
* Copyright 2008-2013 Freescale Semiconductor Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Freescale Semiconductor nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") as published by the Free Software
* Foundation, either version 2 of that License or (at your option) any
* later version.
*
* THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/module.h>
#include <linux/fsl_bman.h>
#include "dpaa_eth.h"
#include "dpaa_eth_unit_test.h"
static bool tx_unit_test_passed = true;
static unsigned char *tx_unit_skb_head;
static unsigned char *tx_unit_skb_end;
static int tx_unit_tested;
static struct dpa_fq unit_fq;
#ifdef CONFIG_FSL_DPAA_TX_RECYCLE
static struct dpa_fq unit_recycle_fq;
#endif
static bool tx_unit_test_ran; /* initialized as false */
static void tx_unit_test_ern(struct qman_portal *portal,
struct qman_fq *fq,
const struct qm_mr_entry *msg)
{
struct net_device *net_dev;
struct dpa_priv_s *priv;
struct sk_buff **skbh;
struct sk_buff *skb;
const struct qm_fd *fd;
dma_addr_t addr;
net_dev = ((struct dpa_fq *)fq)->net_dev;
priv = netdev_priv(net_dev);
tx_unit_test_passed = false;
fd = &msg->ern.fd;
addr = qm_fd_addr(fd);
skbh = (struct sk_buff **)phys_to_virt(addr);
skb = *skbh;
if (!skb || !is_kernel_addr((unsigned long)skb))
panic("Corrupt skb in ERN!\n");
kfree_skb(skb);
}
static enum qman_cb_dqrr_result tx_unit_test_dqrr(
struct qman_portal *portal,
struct qman_fq *fq,
const struct qm_dqrr_entry *dq)
{
struct net_device *net_dev;
struct dpa_priv_s *priv;
struct sk_buff **skbh;
struct sk_buff *skb;
const struct qm_fd *fd;
dma_addr_t addr;
unsigned char *startaddr;
struct dpa_percpu_priv_s *percpu_priv;
tx_unit_test_passed = false;
tx_unit_tested++;
net_dev = ((struct dpa_fq *)fq)->net_dev;
priv = netdev_priv(net_dev);
percpu_priv = per_cpu_ptr(priv->percpu_priv, smp_processor_id());
fd = &dq->fd;
addr = qm_fd_addr(fd);
skbh = (struct sk_buff **)phys_to_virt(addr);
startaddr = (unsigned char *)skbh;
skb = *skbh;
if (!skb || !is_kernel_addr((unsigned long)skb))
panic("Invalid skb address in TX Unit Test FD\n");
/* Make sure we're dealing with the same skb */
if (skb->head != tx_unit_skb_head
|| skb_end_pointer(skb) != tx_unit_skb_end)
goto out;
/* If we recycled, then there must be enough room between fd.addr
* and skb->end for a new RX buffer
*/
if (fd->cmd & FM_FD_CMD_FCO) {
size_t bufsize = skb_end_pointer(skb) - startaddr;
if (bufsize < dpa_get_max_frm())
goto out;
} else {
/*
* If we didn't recycle, but the buffer was big enough,
* increment the counter to put it back
*/
if (skb_end_pointer(skb) - skb->head >=
dpa_get_max_frm())
(*percpu_priv->dpa_bp_count)++;
/* If we didn't recycle, the data pointer should be good */
if (skb->data != startaddr + dpa_fd_offset(fd))
goto out;
}
tx_unit_test_passed = true;
out:
/* The skb is no longer needed, and belongs to us */
kfree_skb(skb);
return qman_cb_dqrr_consume;
}
static const struct qman_fq tx_unit_test_fq = {
.cb = { .dqrr = tx_unit_test_dqrr, .ern = tx_unit_test_ern }
};
static int dpa_tx_unit_test(struct net_device *net_dev)
{
/* Create a new FQ */
struct dpa_priv_s *priv = netdev_priv(net_dev);
struct qman_fq *oldq;
int size, headroom;
struct dpa_percpu_priv_s *percpu_priv;
cpumask_var_t old_cpumask;
int test_count = 0;
int err = 0;
int tests_failed = 0;
const cpumask_t *cpus = qman_affine_cpus();
#ifdef CONFIG_FSL_DPAA_TX_RECYCLE
struct qman_fq *oldrecycleq;
#endif
if (!alloc_cpumask_var(&old_cpumask, GFP_KERNEL)) {
pr_err("UNIT test cpumask allocation failed\n");
return -ENOMEM;
}
cpumask_copy(old_cpumask, tsk_cpus_allowed(current));
set_cpus_allowed_ptr(current, cpus);
/* disable bottom halves */
local_bh_disable();
percpu_priv = per_cpu_ptr(priv->percpu_priv, smp_processor_id());
qman_irqsource_remove(QM_PIRQ_DQRI);
unit_fq.net_dev = net_dev;
unit_fq.fq_base = tx_unit_test_fq;
/* Save old queue */
oldq = priv->egress_fqs[smp_processor_id()];
err = qman_create_fq(0, QMAN_FQ_FLAG_DYNAMIC_FQID, &unit_fq.fq_base);
if (err < 0) {
pr_err("UNIT test FQ create failed: %d\n", err);
goto fq_create_fail;
}
err = qman_init_fq(&unit_fq.fq_base,
QMAN_INITFQ_FLAG_SCHED | QMAN_INITFQ_FLAG_LOCAL, NULL);
if (err < 0) {
pr_err("UNIT test FQ init failed: %d\n", err);
goto fq_init_fail;
}
/* Replace queue 0 with this queue */
priv->egress_fqs[smp_processor_id()] = &unit_fq.fq_base;
#ifdef CONFIG_FSL_DPAA_TX_RECYCLE
oldrecycleq = priv->recycle_fqs[smp_processor_id()];
unit_recycle_fq.net_dev = net_dev;
unit_recycle_fq.fq_base = tx_unit_test_fq;
err = qman_create_fq(0, QMAN_FQ_FLAG_DYNAMIC_FQID,
&unit_recycle_fq.fq_base);
if (err < 0) {
pr_err("UNIT test Recycle FQ create failed: %d\n", err);
goto recycle_fq_create_fail;
}
err = qman_init_fq(&unit_recycle_fq.fq_base,
QMAN_INITFQ_FLAG_SCHED | QMAN_INITFQ_FLAG_LOCAL, NULL);
if (err < 0) {
pr_err("UNIT test Recycle FQ init failed: %d\n", err);
goto recycle_fq_init_fail;
}
priv->recycle_fqs[smp_processor_id()] = &unit_recycle_fq.fq_base;
pr_err("TX Unit Test using FQ: %d - Recycle FQ: %d\n",
qman_fq_fqid(&unit_fq.fq_base),
qman_fq_fqid(&unit_recycle_fq.fq_base));
#else
pr_err("TX Unit Test using FQ %d\n", qman_fq_fqid(&unit_fq.fq_base));
#endif
/* Try packet sizes from 64-bytes to just above the maximum */
for (size = 64; size <= 9600 + 128; size += 64) {
for (headroom = priv->tx_headroom; headroom < 0x800;
headroom += 16) {
int ret;
struct sk_buff *skb;
test_count++;
skb = dev_alloc_skb(size + headroom);
if (!skb) {
pr_err("Failed to allocate skb\n");
err = -ENOMEM;
goto end_test;
}
if (skb_end_pointer(skb) - skb->head >=
dpa_get_max_frm())
(*percpu_priv->dpa_bp_count)--;
skb_put(skb, size + headroom);
skb_pull(skb, headroom);
tx_unit_skb_head = skb->head;
tx_unit_skb_end = skb_end_pointer(skb);
skb_set_queue_mapping(skb, smp_processor_id());
/* tx */
ret = net_dev->netdev_ops->ndo_start_xmit(skb, net_dev);
if (ret != NETDEV_TX_OK) {
pr_err("Failed to TX with err %d\n", ret);
err = -EIO;
goto end_test;
}
/* Wait for it to arrive */
ret = spin_event_timeout(qman_poll_dqrr(1) != 0,
100000, 1);
if (!ret) {
pr_err("TX Packet never arrived\n");
/*
* Count the test as failed.
*/
tests_failed++;
}
/* Was it good? */
if (tx_unit_test_passed == false) {
pr_err("Test failed:\n");
pr_err("size: %d pad: %d head: %p end: %p\n",
size, headroom, tx_unit_skb_head,
tx_unit_skb_end);
tests_failed++;
}
}
}
end_test:
err = qman_retire_fq(&unit_fq.fq_base, NULL);
if (unlikely(err < 0))
pr_err("Could not retire TX Unit Test FQ (%d)\n", err);
err = qman_oos_fq(&unit_fq.fq_base);
if (unlikely(err < 0))
pr_err("Could not OOS TX Unit Test FQ (%d)\n", err);
#ifdef CONFIG_FSL_DPAA_TX_RECYCLE
err = qman_retire_fq(&unit_recycle_fq.fq_base, NULL);
if (unlikely(err < 0))
pr_err("Could not retire Recycle TX Unit Test FQ (%d)\n", err);
err = qman_oos_fq(&unit_recycle_fq.fq_base);
if (unlikely(err < 0))
pr_err("Could not OOS Recycle TX Unit Test FQ (%d)\n", err);
recycle_fq_init_fail:
qman_destroy_fq(&unit_recycle_fq.fq_base, 0);
recycle_fq_create_fail:
priv->recycle_fqs[smp_processor_id()] = oldrecycleq;
#endif
fq_init_fail:
qman_destroy_fq(&unit_fq.fq_base, 0);
fq_create_fail:
priv->egress_fqs[smp_processor_id()] = oldq;
local_bh_enable();
qman_irqsource_add(QM_PIRQ_DQRI);
tx_unit_test_ran = true;
set_cpus_allowed_ptr(current, old_cpumask);
free_cpumask_var(old_cpumask);
pr_err("Tested %d/%d packets. %d failed\n", test_count, tx_unit_tested,
tests_failed);
if (tests_failed)
err = -EINVAL;
/* Reset counters */
memset(&percpu_priv->stats, 0, sizeof(percpu_priv->stats));
return err;
}
void dpa_unit_test_drain_default_pool(struct net_device *net_dev)
{
int i;
int num;
struct dpa_priv_s *priv;
struct dpa_percpu_priv_s *percpu_priv;
priv = netdev_priv(net_dev);
do {
struct bm_buffer bmb[8];
num = bman_acquire(default_pool->pool, bmb, 8, 0);
for (i = 0; i < num; i++) {
dma_addr_t addr = bm_buf_addr(&bmb[i]);
dma_unmap_single(default_pool->dev, addr,
default_pool->size,
DMA_BIDIRECTIONAL);
_dpa_bp_free_buf(phys_to_virt(addr));
}
} while (num == 8);
/* restore counters to their previous state */
free_percpu(default_pool->percpu_count);
for_each_online_cpu(i) {
percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
percpu_priv->dpa_bp = NULL;
percpu_priv->dpa_bp_count = NULL;
}
}
void dpa_unit_test_seed_default_pool(struct net_device *net_dev)
{
int i;
struct dpa_priv_s *priv;
struct dpa_percpu_priv_s *percpu_priv;
priv = netdev_priv(net_dev);
default_pool->size = default_buf_size;
dpa_make_private_pool(default_pool);
for_each_online_cpu(i) {
percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
if (!percpu_priv->dpa_bp) {
percpu_priv->dpa_bp = priv->dpa_bp;
percpu_priv->dpa_bp_count =
per_cpu_ptr(priv->dpa_bp->percpu_count,
i);
}
}
}
void dpa_unit_tests(struct net_device *net_dev)
{
int err;
/* the unit tests use the default pool */
if (!default_pool)
return;
if (!tx_unit_test_ran) {
dpa_unit_test_seed_default_pool(net_dev);
err = dpa_tx_unit_test(net_dev);
WARN_ON(err);
dpa_unit_test_drain_default_pool(net_dev);
}
}
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