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tests: drivers: dma: scatter_gather: Make transfer size configurable

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Various SoCs have different limitations when it comes to DMA buffer
sizes. This change allows to chose a suitable value for them.

Signed-off-by: Reto Schneider <reto.schneider@husqvarnagroup.com>
This commit is contained in:
Reto Schneider 2024-04-28 02:26:26 +02:00 • committed by David Leach
commit 134523d90c
2 changed files with 14 additions and 11 deletions
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4
tests/drivers/dma/scatter_gather/Kconfig
View file

@ -8,3 +8,7 @@ source "Kconfig.zephyr"
config DMA_SG_CHANNEL_NR
int "DMA channel to use"
default 0
config DMA_SG_XFER_SIZE
int "Number of bytes to transfer"
default 8192

21
tests/drivers/dma/scatter_gather/src/test_dma_sg.c
View file

@ -22,17 +22,16 @@
#include <zephyr/ztest.h>
#define XFERS 4
#define XFER_SIZE 8192
#if CONFIG_NOCACHE_MEMORY
static __aligned(32) uint8_t tx_data[XFER_SIZE] __used
static __aligned(32) uint8_t tx_data[CONFIG_DMA_SG_XFER_SIZE] __used
__attribute__((__section__(".nocache")));
static __aligned(32) uint8_t rx_data[XFERS][XFER_SIZE] __used
static __aligned(32) uint8_t rx_data[XFERS][CONFIG_DMA_SG_XFER_SIZE] __used
__attribute__((__section__(".nocache.dma")));
#else
/* this src memory shall be in RAM to support usingas a DMA source pointer.*/
static __aligned(32) uint8_t tx_data[XFER_SIZE];
static __aligned(32) uint8_t rx_data[XFERS][XFER_SIZE] = { { 0 } };
/* this src memory shall be in RAM to support using as a DMA source pointer.*/
static __aligned(32) uint8_t tx_data[CONFIG_DMA_SG_XFER_SIZE];
static __aligned(32) uint8_t rx_data[XFERS][CONFIG_DMA_SG_XFER_SIZE] = { { 0 } };
#endif
K_SEM_DEFINE(xfer_sem, 0, 1);
@ -61,7 +60,7 @@ static int test_sg(void)
memset(tx_data, 0, sizeof(tx_data));
for (int i = 0; i < XFER_SIZE; i++) {
for (int i = 0; i < CONFIG_DMA_SG_XFER_SIZE; i++) {
tx_data[i] = i;
}
@ -102,18 +101,18 @@ static int test_sg(void)
memset(dma_block_cfgs, 0, sizeof(dma_block_cfgs));
for (int i = 0; i < XFERS; i++) {
dma_block_cfgs[i].source_gather_en = 1U;
dma_block_cfgs[i].block_size = XFER_SIZE;
dma_block_cfgs[i].block_size = CONFIG_DMA_SG_XFER_SIZE;
#ifdef CONFIG_DMA_64BIT
dma_block_cfgs[i].source_address = (uint64_t)(tx_data);
dma_block_cfgs[i].dest_address = (uint64_t)(rx_data[i]);
TC_PRINT("dma block %d block_size %d, source addr %" PRIx64 ", dest addr %"
PRIx64 "\n", i, XFER_SIZE, dma_block_cfgs[i].source_address,
PRIx64 "\n", i, CONFIG_DMA_SG_XFER_SIZE, dma_block_cfgs[i].source_address,
dma_block_cfgs[i].dest_address);
#else
dma_block_cfgs[i].source_address = (uint32_t)(tx_data);
dma_block_cfgs[i].dest_address = (uint32_t)(rx_data[i]);
TC_PRINT("dma block %d block_size %d, source addr %x, dest addr %x\n",
i, XFER_SIZE, dma_block_cfgs[i].source_address,
i, CONFIG_DMA_SG_XFER_SIZE, dma_block_cfgs[i].source_address,
dma_block_cfgs[i].dest_address);
#endif
if (i < XFERS - 1) {
@ -145,7 +144,7 @@ static int test_sg(void)
for (int i = 0; i < XFERS; i++) {
TC_PRINT("rx_data[%d]\n", i);
if (memcmp(tx_data, rx_data[i], XFER_SIZE)) {
if (memcmp(tx_data, rx_data[i], CONFIG_DMA_SG_XFER_SIZE)) {
return TC_FAIL;
}
}