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/* SPDX-License-Identifier: Apache-2.0
* Copyright (c) 2022 Cisco Systems, Inc.
*/
#include <vlib/vlib.h>
#include <vlib/physmem_funcs.h>
#include <vlib/dma/dma.h>
static clib_error_t *
show_dma_backends_command_fn (vlib_main_t *vm, unformat_input_t *input,
vlib_cli_command_t *cmd)
{
vlib_dma_main_t *dm = &vlib_dma_main;
if (vec_len (dm->backends))
{
vlib_dma_backend_t *b;
vec_foreach (b, dm->backends)
vlib_cli_output (vm, "%s", b->name);
}
else
vlib_cli_output (vm, "No active DMA backends");
return 0;
}
VLIB_CLI_COMMAND (avf_create_command, static) = {
.path = "show dma backends",
.short_help = "show dma backends",
.function = show_dma_backends_command_fn,
};
static void
test_dma_cb_fn (vlib_main_t *vm, vlib_dma_batch_t *b)
{
fformat (stderr, "%s: cb %p cookie %lx\n", __func__, b,
vlib_dma_batch_get_cookie (vm, b));
}
static clib_error_t *
fill_random_data (void *buffer, uword size)
{
uword seed = random_default_seed ();
uword remain = size;
const uword p = clib_mem_get_page_size ();
uword offset = 0;
clib_random_buffer_t rb;
clib_random_buffer_init (&rb, seed);
while (remain > 0)
{
uword fill_size = clib_min (p, remain);
clib_random_buffer_fill (&rb, fill_size);
void *rbuf = clib_random_buffer_get_data (&rb, fill_size);
clib_memcpy_fast (buffer + offset, rbuf, fill_size);
clib_random_buffer_free (&rb);
offset += fill_size;
remain -= fill_size;
}
return 0;
}
static clib_error_t *
test_dma_command_fn (vlib_main_t *vm, unformat_input_t *input,
vlib_cli_command_t *cmd)
{
clib_error_t *err = 0;
vlib_dma_batch_t *b;
int config_index = -1;
u32 rsz, n_alloc, v;
u8 *from = 0, *to = 0;
vlib_dma_config_t cfg = { .max_transfers = 256,
.max_transfer_size = 4096,
.callback_fn = test_dma_cb_fn };
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "transfers %u", &v))
cfg.max_transfers = v;
else if (unformat (input, "size %u", &v))
cfg.max_transfer_size = v;
else
return clib_error_return (0, "unknown input `%U'",
format_unformat_error, input);
}
if ((config_index = vlib_dma_config_add (vm, &cfg)) < 0)
{
err = clib_error_return (0, "Unable to allocate dma config");
return err;
}
rsz = round_pow2 (cfg.max_transfer_size, CLIB_CACHE_LINE_BYTES);
n_alloc = rsz * cfg.max_transfers * 2;
if ((from = vlib_physmem_alloc_aligned_on_numa (
vm, n_alloc, CLIB_CACHE_LINE_BYTES, vm->numa_node)) == 0)
{
err = clib_error_return (0, "Unable to allocate %u bytes of physmem",
n_alloc);
return err;
}
to = from + n_alloc / 2;
u32 port_allocator_seed;
fill_random_data (from, cfg.max_transfers * rsz);
b = vlib_dma_batch_new (vm, config_index);
vlib_dma_batch_set_cookie (vm, b, 0x12345678);
port_allocator_seed = clib_cpu_time_now ();
int transfers = random_u32 (&port_allocator_seed) % cfg.max_transfers;
if (!transfers)
transfers = 1;
for (int i = 0; i < transfers; i++)
vlib_dma_batch_add (vm, b, to + i * rsz, from + i * rsz,
cfg.max_transfer_size);
vlib_dma_batch_submit (vm, b);
return err;
}
static clib_error_t *
test_show_dma_fn (vlib_main_t *vm, unformat_input_t *input,
vlib_cli_command_t *cmd)
{
clib_error_t *err = 0;
int config_index = 0;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "config %u", &config_index))
;
else
return clib_error_return (0, "unknown input `%U'",
format_unformat_error, input);
}
for (u32 i = 0; i < vlib_get_n_threads (); i++)
vlib_cli_output (vm, "Config %d %U", config_index, vlib_dma_config_info,
config_index, vlib_get_main_by_index (i));
return err;
}
VLIB_CLI_COMMAND (test_dma_command, static) = {
.path = "test dma",
.short_help = "test dma [transfers <x> size <x>]",
.function = test_dma_command_fn,
};
VLIB_CLI_COMMAND (show_dma_command, static) = {
.path = "show dma",
.short_help = "show dma [config <x>]",
.function = test_show_dma_fn,
};
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