diff options
Diffstat (limited to 'linux/drivers/soc/fsl/qbman/bman_test_thresh.c')
| -rw-r--r-- | linux/drivers/soc/fsl/qbman/bman_test_thresh.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/linux/drivers/soc/fsl/qbman/bman_test_thresh.c b/linux/drivers/soc/fsl/qbman/bman_test_thresh.c new file mode 100644 index 00000000..c0f045be --- /dev/null +++ b/linux/drivers/soc/fsl/qbman/bman_test_thresh.c @@ -0,0 +1,216 @@ +#include <machine/rtems-bsd-kernel-space.h> + +#include <rtems/bsd/local/opt_dpaa.h> + +/* Copyright 2010 - 2015 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 "bman_test.h" + +/* Test constants */ +#define TEST_NUMBUFS 129728 +#define TEST_EXIT 129536 +#define TEST_ENTRY 129024 + +struct affine_test_data { + struct task_struct *t; + int cpu; +#ifndef __rtems__ + int expect_affinity; +#endif /* __rtems__ */ + int drain; + int num_enter; + int num_exit; + struct list_head node; + struct completion wakethread; + struct completion wakeparent; +}; + +static void cb_depletion(struct bman_portal *portal, + struct bman_pool *pool, + void *opaque, + int depleted) +{ + struct affine_test_data *data = opaque; + int c = smp_processor_id(); + + pr_info("%s(): bpid=%d, depleted=%d, cpu=%d, original=%d\n", __func__, + bman_get_params(pool)->bpid, !!depleted, c, data->cpu); + /* We should be executing on the CPU of the thread that owns the pool if + * and that CPU has an affine portal (ie. it isn't slaved). */ +#ifndef __rtems__ + BUG_ON((c != data->cpu) && data->expect_affinity); + BUG_ON((c == data->cpu) && !data->expect_affinity); +#endif /* __rtems__ */ + if (depleted) + data->num_enter++; + else + data->num_exit++; +} + +/* Params used to set up a pool, this also dynamically allocates a BPID */ +static const struct bman_pool_params params_nocb = { + .flags = BMAN_POOL_FLAG_DYNAMIC_BPID | BMAN_POOL_FLAG_THRESH, + .thresholds = { TEST_ENTRY, TEST_EXIT, 0, 0 } +}; + +/* Params used to set up each cpu's pool with callbacks enabled */ +static struct bman_pool_params params_cb = { + .bpid = 0, /* will be replaced to match pool_nocb */ + .flags = BMAN_POOL_FLAG_DEPLETION, + .cb = cb_depletion +}; + +static struct bman_pool *pool_nocb; +static LIST_HEAD(threads); + +static int affine_test(void *__data) +{ + struct bman_pool *pool; + struct affine_test_data *data = __data; + struct bman_pool_params my_params = params_cb; + + pr_info("Thread %d: starting\n", data->cpu); + /* create the pool */ + my_params.cb_ctx = data; + pool = bman_new_pool(&my_params); + BUG_ON(!pool); + complete(&data->wakeparent); + wait_for_completion(&data->wakethread); + init_completion(&data->wakethread); + + /* if we're the drainer, we get signalled for that */ + if (data->drain) { + struct bm_buffer buf; + int ret; + + pr_info("Thread %d: draining...\n", data->cpu); + do { + ret = bman_acquire(pool, &buf, 1, 0); + } while (ret > 0); + pr_info("Thread %d: draining done.\n", data->cpu); + complete(&data->wakeparent); + wait_for_completion(&data->wakethread); + init_completion(&data->wakethread); + } + + /* cleanup */ + bman_free_pool(pool); + while (!kthread_should_stop()) + cpu_relax(); + pr_info("Thread %d: exiting\n", data->cpu); + return 0; +} + +static struct affine_test_data *start_affine_test(int cpu, int drain) +{ + struct affine_test_data *data = kmalloc(sizeof(*data), GFP_KERNEL); + + if (!data) + return NULL; + data->cpu = cpu; +#ifndef __rtems__ + data->expect_affinity = cpumask_test_cpu(cpu, bman_affine_cpus()); +#endif /* __rtems__ */ + data->drain = drain; + data->num_enter = 0; + data->num_exit = 0; + init_completion(&data->wakethread); + init_completion(&data->wakeparent); + list_add_tail(&data->node, &threads); + data->t = kthread_create(affine_test, data, "threshtest%d", cpu); +#ifndef __rtems__ + BUG_ON(IS_ERR(data->t)); +#else /* __rtems__ */ + BUG_ON(data->t == NULL); +#endif /* __rtems__ */ + kthread_bind(data->t, cpu); + wake_up_process(data->t); + return data; +} + +void bman_test_thresh(void) +{ + int loop = TEST_NUMBUFS; + int ret, num_cpus = 0; + struct affine_test_data *data, *drainer = NULL; + + pr_info("%s(): Start\n", __func__); + + /* allocate a BPID and seed it */ + pool_nocb = bman_new_pool(¶ms_nocb); + BUG_ON(!pool_nocb); + while (loop--) { + struct bm_buffer buf; + + bm_buffer_set64(&buf, 0x0badbeef + loop); + ret = bman_release(pool_nocb, &buf, 1, + BMAN_RELEASE_FLAG_WAIT); + BUG_ON(ret); + } + while (!bman_rcr_is_empty()) + cpu_relax(); + pr_info("%s(): Buffers are in\n", __func__); + + /* create threads and wait for them to create pools */ + params_cb.bpid = bman_get_params(pool_nocb)->bpid; +#ifndef __rtems__ + for_each_cpu(loop, cpu_online_mask) { +#else /* __rtems__ */ + for (loop = 0; loop < rtems_get_processor_count(); ++loop) { +#endif /* __rtems__ */ + data = start_affine_test(loop, drainer ? 0 : 1); + BUG_ON(!data); + if (!drainer) + drainer = data; + num_cpus++; + wait_for_completion(&data->wakeparent); + } + + /* signal the drainer to start draining */ + complete(&drainer->wakethread); + wait_for_completion(&drainer->wakeparent); + init_completion(&drainer->wakeparent); + + /* tear down */ + list_for_each_entry_safe(data, drainer, &threads, node) { + complete(&data->wakethread); + ret = kthread_stop(data->t); + BUG_ON(ret); + list_del(&data->node); + /* check that we get the expected callbacks (and no others) */ + BUG_ON(data->num_enter != 1); + BUG_ON(data->num_exit != 0); + kfree(data); + } + bman_free_pool(pool_nocb); + + pr_info("%s(): Done\n", __func__); +} |