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refactor(gdma): channel allocation can return both direction within the same call

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morris
2026-01-04 15:39:38 +08:00
parent 7c218e6531
commit fb1b53c7c5
31 changed files with 336 additions and 365 deletions
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components/esp_driver_bitscrambler/src/bitscrambler_loopback.c
+5 -13
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@@ -41,19 +41,19 @@ _Static_assert(offsetof(bitscrambler_loopback_t, bs) == 0, "bs needs to be 1st m
static void bitscrambler_loopback_free(bitscrambler_loopback_t *bsl);
static esp_err_t bitscrambler_loopback_cleanup(bitscrambler_handle_t bs, void* user_ctx);
static esp_err_t new_dma_channel(const gdma_channel_alloc_config_t *cfg, gdma_channel_handle_t *handle, int bus)
static esp_err_t new_dma_channel(const gdma_channel_alloc_config_t *cfg, gdma_channel_handle_t *tx_handle, gdma_channel_handle_t *rx_handle, int bus)
{
esp_err_t ret = ESP_OK;
//Note that there are chips that do not have SOC_GDMA_BUS_* defined, but those chips also do
//not have a BitScrambler.
#ifdef SOC_GDMA_BUS_AHB
if (bus == SOC_GDMA_BUS_AHB || bus == SOC_GDMA_BUS_ANY) {
ESP_RETURN_ON_ERROR(gdma_new_ahb_channel(cfg, handle), TAG, "alloc AHB DMA channel failed");
ESP_RETURN_ON_ERROR(gdma_new_ahb_channel(cfg, tx_handle, rx_handle), TAG, "alloc AHB DMA channel failed");
}
#endif
#ifdef SOC_GDMA_BUS_AXI
if (bus == SOC_GDMA_BUS_AXI) {
ESP_RETURN_ON_ERROR(gdma_new_axi_channel(cfg, handle), TAG, "alloc AXI DMA channel failed");
ESP_RETURN_ON_ERROR(gdma_new_axi_channel(cfg, tx_handle, rx_handle), TAG, "alloc AXI DMA channel failed");
}
#endif
return ret;
@@ -115,16 +115,8 @@ esp_err_t bitscrambler_loopback_create(bitscrambler_handle_t *handle, int attach
ESP_GOTO_ON_ERROR(gdma_new_link_list(&dma_link_cfg, &bs->rx_link_list), err, TAG, "failed to create RX link list");
// create TX channel and RX channel, they should reside in the same DMA pair
gdma_channel_alloc_config_t tx_alloc_config = {
.direction = GDMA_CHANNEL_DIRECTION_TX,
.flags.reserve_sibling = 1,
};
ESP_GOTO_ON_ERROR(new_dma_channel(&tx_alloc_config, &bs->tx_channel, bus), err, TAG, "failed to create GDMA TX channel");
gdma_channel_alloc_config_t rx_alloc_config = {
.direction = GDMA_CHANNEL_DIRECTION_RX,
.sibling_chan = bs->tx_channel,
};
ESP_GOTO_ON_ERROR(new_dma_channel(&rx_alloc_config, &bs->rx_channel, bus), err, TAG, "failed to create GDMA RX channel");
gdma_channel_alloc_config_t alloc_config = {0};
ESP_GOTO_ON_ERROR(new_dma_channel(&alloc_config, &bs->tx_channel, &bs->rx_channel, bus), err, TAG, "failed to create GDMA channels");
gdma_connect(bs->rx_channel, g_bitscrambler_periph_desc[attach_to].dma_trigger);
gdma_connect(bs->tx_channel, g_bitscrambler_periph_desc[attach_to].dma_trigger);