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refactor(spi_slave_hd): replace part of dma_ll in hd hal layer

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This commit is contained in:
wanlei 2023-12-20 16:14:34 +08:00 committed by Wan Lei
parent 67f798b666
commit c82ea4311e
9 changed files with 235 additions and 277 deletions
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9
components/esp_driver_spi/include/esp_private/spi_common_internal.h
View File

@ -34,6 +34,15 @@ typedef dma_descriptor_align8_t spi_dma_desc_t;
typedef dma_descriptor_align4_t spi_dma_desc_t;
#endif
#if SOC_NON_CACHEABLE_OFFSET
#include "hal/cache_ll.h"
#define ADDR_DMA_2_CPU(addr) ((typeof(addr))CACHE_LL_L2MEM_NON_CACHE_ADDR(addr))
#define ADDR_CPU_2_DMA(addr) ((typeof(addr))CACHE_LL_L2MEM_CACHE_ADDR(addr))
#else
#define ADDR_DMA_2_CPU(addr) (addr)
#define ADDR_CPU_2_DMA(addr) (addr)
#endif
/// Attributes of an SPI bus
typedef struct {
spi_bus_config_t bus_cfg; ///< Config used to initialize the bus

16
components/esp_driver_spi/include/esp_private/spi_dma.h
View File

@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2023-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -36,6 +36,13 @@ typedef struct {
*/
void spi_dma_enable_burst(spi_dma_chan_handle_t chan_handle, bool data_burst, bool desc_burst);
/**
* Re-trigger a HW pre-load to pick up appended linked descriptor
*
* @param chan_handle Context of the spi_dma channel.
*/
void spi_dma_append(spi_dma_chan_handle_t chan_handle);
/**
* Reset dma channel for spi_dma
*
@ -51,6 +58,13 @@ void spi_dma_reset(spi_dma_chan_handle_t chan_handle);
*/
void spi_dma_start(spi_dma_chan_handle_t chan_handle, void *addr);
/**
* Get EOF descriptor for a dma channel
*
* @param chan_handle Context of the spi_dma channel.
*/
uint32_t spi_dma_get_eof_desc(spi_dma_chan_handle_t chan_handle);
#endif //!SOC_GDMA_SUPPORTED
#ifdef __cplusplus

3
components/esp_driver_spi/linker.lf
View File

@ -5,3 +5,6 @@ entries:
if SOC_GDMA_SUPPORTED != y && (SPI_MASTER_ISR_IN_IRAM = y || SPI_SLAVE_ISR_IN_IRAM = y):
spi_dma: spi_dma_reset (noflash)
spi_dma: spi_dma_start (noflash)
if SOC_SPI_SUPPORT_SLAVE_HD_VER2 = y:
spi_dma: spi_dma_get_eof_desc (noflash)

12
components/esp_driver_spi/src/gpspi/spi_common.c
View File

@ -14,7 +14,6 @@
#include "esp_rom_gpio.h"
#include "esp_heap_caps.h"
#include "soc/spi_periph.h"
#include "soc/ext_mem_defs.h"
#include "driver/spi_master.h"
#include "driver/gpio.h"
#include "esp_private/gpio.h"
@ -27,9 +26,6 @@
#if CONFIG_IDF_TARGET_ESP32
#include "soc/dport_reg.h"
#endif
#if SOC_GDMA_SUPPORTED
#include "esp_private/gdma.h"
#endif
static const char *SPI_TAG = "spi";
@ -307,14 +303,6 @@ esp_err_t spicommon_dma_desc_alloc(spi_dma_ctx_t *dma_ctx, int cfg_max_sz, int *
return ESP_OK;
}
#if SOC_NON_CACHEABLE_OFFSET
#define ADDR_DMA_2_CPU(addr) ((typeof(addr))((uint32_t)(addr) + SOC_NON_CACHEABLE_OFFSET))
#define ADDR_CPU_2_DMA(addr) ((typeof(addr))((uint32_t)(addr) - SOC_NON_CACHEABLE_OFFSET))
#else
#define ADDR_DMA_2_CPU(addr) (addr)
#define ADDR_CPU_2_DMA(addr) (addr)
#endif
void IRAM_ATTR spicommon_dma_desc_setup_link(spi_dma_desc_t *dmadesc, const void *data, int len, bool is_rx)
{
dmadesc = ADDR_DMA_2_CPU(dmadesc);

24
components/esp_driver_spi/src/gpspi/spi_dma.c
View File

@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2023-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -21,8 +21,30 @@ void spi_dma_enable_burst(spi_dma_chan_handle_t chan_handle, bool data_burst, bo
}
}
#if SOC_SPI_SUPPORT_SLAVE_HD_VER2
void spi_dma_append(spi_dma_chan_handle_t chan_handle)
{
spi_dma_dev_t *spi_dma = SPI_LL_GET_HW(chan_handle.host_id);
if (chan_handle.dir == DMA_CHANNEL_DIRECTION_TX) {
spi_dma_ll_tx_restart(spi_dma, chan_handle.chan_id);
} else {
spi_dma_ll_rx_restart(spi_dma, chan_handle.chan_id);
}
}
/************************************* IRAM CONTEXT **************************************/
uint32_t spi_dma_get_eof_desc(spi_dma_chan_handle_t chan_handle)
{
spi_dma_dev_t *spi_dma = SPI_LL_GET_HW(chan_handle.host_id);
return (chan_handle.dir == DMA_CHANNEL_DIRECTION_TX) ?
spi_dma_ll_get_out_eof_desc_addr(spi_dma, chan_handle.chan_id) :
spi_dma_ll_get_in_suc_eof_desc_addr(spi_dma, chan_handle.chan_id);
}
#endif //SOC_SPI_SUPPORT_SLAVE_HD_VER2
void spi_dma_reset(spi_dma_chan_handle_t chan_handle)
{
spi_dma_dev_t *spi_dma = SPI_LL_GET_HW(chan_handle.host_id);

183
components/esp_driver_spi/src/gpspi/spi_slave_hd.c
View File

@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2010-2023 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2010-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -65,11 +65,18 @@ static spi_slave_hd_slot_t *spihost[SOC_SPI_PERIPH_NUM];
static const char TAG[] = "slave_hd";
#if SOC_GDMA_SUPPORTED
static bool spi_gdma_tx_channel_callback(gdma_channel_handle_t dma_chan, gdma_event_data_t *event_data, void *user_data);
// for which dma is provided by gdma driver
#define spi_dma_reset gdma_reset
#define spi_dma_start(chan, addr) gdma_start(chan, (intptr_t)(addr))
#define spi_dma_append gdma_append
static bool s_spi_slave_hd_append_gdma_isr(gdma_channel_handle_t dma_chan, gdma_event_data_t *event_data, void *user_data);
#else
// by spi_dma, mainly esp32s2
static void s_spi_slave_hd_append_legacy_isr(void *arg);
#endif // SOC_GDMA_SUPPORTED
static void spi_slave_hd_intr_append(void *arg);
static void spi_slave_hd_intr_segment(void *arg);
static void s_spi_slave_hd_segment_isr(void *arg);
esp_err_t spi_slave_hd_init(spi_host_device_t host_id, const spi_bus_config_t *bus_config, const spi_slave_hd_slot_config_t *config)
{
@ -102,6 +109,16 @@ esp_err_t spi_slave_hd_init(spi_host_device_t host_id, const spi_bus_config_t *b
if (ret != ESP_OK) {
goto cleanup;
}
#if SOC_GDMA_SUPPORTED
gdma_strategy_config_t dma_strategy = {
.auto_update_desc = true,
.eof_till_data_popped = true,
};
gdma_apply_strategy(host->dma_ctx->tx_dma_chan, &dma_strategy);
#else
spi_dma_ll_enable_out_auto_wrback(SPI_LL_GET_HW(host->dma_ctx->tx_dma_chan.host_id), host->dma_ctx->tx_dma_chan.chan_id, 1);
spi_dma_ll_set_out_eof_generation(SPI_LL_GET_HW(host->dma_ctx->tx_dma_chan.host_id), host->dma_ctx->tx_dma_chan.chan_id, 1);
#endif
ret = spicommon_dma_desc_alloc(host->dma_ctx, bus_config->max_transfer_sz, &host->max_transfer_sz);
if (ret != ESP_OK) {
goto cleanup;
@ -141,8 +158,6 @@ esp_err_t spi_slave_hd_init(spi_host_device_t host_id, const spi_bus_config_t *b
spi_slave_hd_hal_config_t hal_config = {
.host_id = host_id,
.dma_in = SPI_LL_GET_HW(host_id),
.dma_out = SPI_LL_GET_HW(host_id),
.dma_enabled = host->dma_enabled,
.append_mode = append_mode,
.mode = config->mode,
@ -150,15 +165,6 @@ esp_err_t spi_slave_hd_init(spi_host_device_t host_id, const spi_bus_config_t *b
.rx_lsbfirst = (config->flags & SPI_SLAVE_HD_TXBIT_LSBFIRST),
};
#if SOC_GDMA_SUPPORTED
//temporary used for gdma_ll alias in hal layer
gdma_get_channel_id(host->dma_ctx->tx_dma_chan, (int *)&hal_config.tx_dma_chan);
gdma_get_channel_id(host->dma_ctx->rx_dma_chan, (int *)&hal_config.rx_dma_chan);
#else
hal_config.tx_dma_chan = host->dma_ctx->tx_dma_chan.chan_id;
hal_config.rx_dma_chan = host->dma_ctx->rx_dma_chan.chan_id;
#endif
//Init the hal according to the hal_config set above
spi_slave_hd_hal_init(&host->hal, &hal_config);
@ -192,34 +198,28 @@ esp_err_t spi_slave_hd_init(spi_host_device_t host_id, const spi_bus_config_t *b
//Alloc intr
if (!host->append_mode) {
//Seg mode
ret = esp_intr_alloc(spicommon_irqsource_for_host(host_id), 0, spi_slave_hd_intr_segment,
ret = esp_intr_alloc(spicommon_irqsource_for_host(host_id), 0, s_spi_slave_hd_segment_isr,
(void *)host, &host->intr);
if (ret != ESP_OK) {
goto cleanup;
}
ret = esp_intr_alloc(spicommon_irqdma_source_for_host(host_id), 0, spi_slave_hd_intr_segment,
ret = esp_intr_alloc(spicommon_irqdma_source_for_host(host_id), 0, s_spi_slave_hd_segment_isr,
(void *)host, &host->intr_dma);
if (ret != ESP_OK) {
goto cleanup;
}
} else {
//Append mode
//On ESP32S2, `cmd7` and `cmd8` interrupts registered as spi rx & tx interrupt are from SPI DMA interrupt source.
//although the `cmd7` and `cmd8` interrupt on spi are registered independently here
ret = esp_intr_alloc(spicommon_irqsource_for_host(host_id), 0, spi_slave_hd_intr_append,
(void *)host, &host->intr);
if (ret != ESP_OK) {
goto cleanup;
}
#if SOC_GDMA_SUPPORTED
// config gmda and ISR callback for gdma supported chip
gdma_tx_event_callbacks_t tx_cbs = {
.on_trans_eof = spi_gdma_tx_channel_callback
// config gmda event callback for gdma supported chip
gdma_rx_event_callbacks_t txrx_cbs = {
.on_recv_eof = s_spi_slave_hd_append_gdma_isr,
};
gdma_register_tx_event_callbacks(host->dma_ctx->tx_dma_chan, &tx_cbs, host);
gdma_register_tx_event_callbacks(host->dma_ctx->tx_dma_chan, (gdma_tx_event_callbacks_t *)&txrx_cbs, host);
gdma_register_rx_event_callbacks(host->dma_ctx->rx_dma_chan, &txrx_cbs, host);
#else
ret = esp_intr_alloc(spicommon_irqdma_source_for_host(host_id), 0, spi_slave_hd_intr_append,
//On ESP32S2, `cmd7` and `cmd8` are designed as all `spi_dma` events, so use `dma_src` only
ret = esp_intr_alloc(spicommon_irqdma_source_for_host(host_id), 0, s_spi_slave_hd_append_legacy_isr,
(void *)host, &host->intr_dma);
if (ret != ESP_OK) {
goto cleanup;
@ -321,8 +321,7 @@ static inline IRAM_ATTR BaseType_t intr_check_clear_callback(spi_slave_hd_slot_t
}
return cb_awoken;
}
static IRAM_ATTR void spi_slave_hd_intr_segment(void *arg)
static IRAM_ATTR void s_spi_slave_hd_segment_isr(void *arg)
{
spi_slave_hd_slot_t *host = (spi_slave_hd_slot_t *)arg;
spi_slave_hd_callback_config_t *callback = &host->callback;
@ -396,7 +395,10 @@ static IRAM_ATTR void spi_slave_hd_intr_segment(void *arg)
if (!host->tx_curr_trans.trans) {
ret = xQueueReceiveFromISR(host->tx_trans_queue, &host->tx_curr_trans, &awoken);
if (ret == pdTRUE) {
spi_slave_hd_hal_txdma(hal, host->tx_curr_trans.aligned_buffer, host->tx_curr_trans.trans->len);
spicommon_dma_desc_setup_link(hal->dmadesc_tx->desc, host->tx_curr_trans.aligned_buffer, host->tx_curr_trans.trans->len, false);
spi_dma_reset(host->dma_ctx->tx_dma_chan);
spi_slave_hd_hal_txdma(hal);
spi_dma_start(host->dma_ctx->tx_dma_chan, host->dma_ctx->dmadesc_tx);
tx_sent = true;
if (callback->cb_send_dma_ready) {
spi_slave_hd_event_t ev = {
@ -412,7 +414,10 @@ static IRAM_ATTR void spi_slave_hd_intr_segment(void *arg)
if (!host->rx_curr_trans.trans) {
ret = xQueueReceiveFromISR(host->rx_trans_queue, &host->rx_curr_trans, &awoken);
if (ret == pdTRUE) {
spi_slave_hd_hal_rxdma(hal, host->rx_curr_trans.aligned_buffer, host->rx_curr_trans.trans->len);
spicommon_dma_desc_setup_link(hal->dmadesc_rx->desc, host->rx_curr_trans.aligned_buffer, host->rx_curr_trans.trans->len, true);
spi_dma_reset(host->dma_ctx->rx_dma_chan);
spi_slave_hd_hal_rxdma(hal);
spi_dma_start(host->dma_ctx->rx_dma_chan, host->dma_ctx->dmadesc_rx);
rx_sent = true;
if (callback->cb_recv_dma_ready) {
spi_slave_hd_event_t ev = {
@ -528,31 +533,35 @@ static IRAM_ATTR void spi_slave_hd_append_rx_isr(void *arg)
}
#if SOC_GDMA_SUPPORTED
// 'spi_gdma_tx_channel_callback' used as spi tx interrupt of append mode on gdma supported target
static IRAM_ATTR bool spi_gdma_tx_channel_callback(gdma_channel_handle_t dma_chan, gdma_event_data_t *event_data, void *user_data)
static IRAM_ATTR bool s_spi_slave_hd_append_gdma_isr(gdma_channel_handle_t dma_chan, gdma_event_data_t *event_data, void *user_data)
{
assert(event_data);
spi_slave_hd_append_tx_isr(user_data);
spi_slave_hd_slot_t *host = (spi_slave_hd_slot_t*)user_data;
host->hal.current_eof_addr = event_data->tx_eof_desc_addr;
if (host->dma_ctx->tx_dma_chan == dma_chan) {
spi_slave_hd_append_tx_isr(user_data);
} else {
spi_slave_hd_append_rx_isr(user_data);
}
return true;
}
#endif // SOC_GDMA_SUPPORTED
// SPI slave hd append isr entrance
static IRAM_ATTR void spi_slave_hd_intr_append(void *arg)
#else
static IRAM_ATTR void s_spi_slave_hd_append_legacy_isr(void *arg)
{
spi_slave_hd_slot_t *host = (spi_slave_hd_slot_t *)arg;
spi_slave_hd_hal_context_t *hal = &host->hal;
bool rx_done = false;
bool tx_done = false;
// Append Mode
portENTER_CRITICAL_ISR(&host->int_spinlock);
if (spi_slave_hd_hal_check_clear_event(hal, SPI_EV_RECV)) {
hal->current_eof_addr = spi_dma_get_eof_desc(host->dma_ctx->rx_dma_chan);
rx_done = true;
}
if (spi_slave_hd_hal_check_clear_event(hal, SPI_EV_SEND)) {
// NOTE: on gdma supported chips, this flag should NOT checked out, handle entrance is only `spi_gdma_tx_channel_callback`,
// otherwise, here should be target limited.
hal->current_eof_addr = spi_dma_get_eof_desc(host->dma_ctx->tx_dma_chan);
tx_done = true;
}
portEXIT_CRITICAL_ISR(&host->int_spinlock);
@ -564,6 +573,7 @@ static IRAM_ATTR void spi_slave_hd_intr_append(void *arg)
spi_slave_hd_append_tx_isr(arg);
}
}
#endif // SOC_GDMA_SUPPORTED
static void s_spi_slave_hd_destroy_priv_trans(spi_host_device_t host, spi_slave_hd_trans_priv_t *priv_trans, spi_slave_chan_t chan)
{
@ -626,6 +636,88 @@ static esp_err_t get_ret_queue_result(spi_host_device_t host_id, spi_slave_chan_
return ESP_OK;
}
esp_err_t s_spi_slave_hd_append_txdma(spi_slave_hd_slot_t *host, uint8_t *data, size_t len, void *arg)
{
spi_slave_hd_hal_context_t *hal = &host->hal;
//Check if there are enough available DMA descriptors for software to use
int num_required = (len + LLDESC_MAX_NUM_PER_DESC - 1) / LLDESC_MAX_NUM_PER_DESC;
int not_recycled_desc_num = hal->tx_used_desc_cnt - hal->tx_recycled_desc_cnt;
int available_desc_num = hal->dma_desc_num - not_recycled_desc_num;
if (num_required > available_desc_num) {
return ESP_ERR_INVALID_STATE;
}
spicommon_dma_desc_setup_link(hal->tx_cur_desc->desc, data, len, false);
hal->tx_cur_desc->arg = arg;
if (!hal->tx_dma_started) {
hal->tx_dma_started = true;
//start a link
hal->tx_dma_tail = hal->tx_cur_desc;
spi_dma_reset(host->dma_ctx->tx_dma_chan);
spi_slave_hd_hal_hw_prepare_tx(hal);
spi_dma_start(host->dma_ctx->tx_dma_chan, hal->tx_cur_desc->desc);
} else {
//there is already a consecutive link
ADDR_DMA_2_CPU(hal->tx_dma_tail->desc)->next = hal->tx_cur_desc->desc;
hal->tx_dma_tail = hal->tx_cur_desc;
spi_dma_append(host->dma_ctx->tx_dma_chan);
}
//Move the current descriptor pointer according to the number of the linked descriptors
for (int i = 0; i < num_required; i++) {
hal->tx_used_desc_cnt++;
hal->tx_cur_desc++;
if (hal->tx_cur_desc == hal->dmadesc_tx + hal->dma_desc_num) {
hal->tx_cur_desc = hal->dmadesc_tx;
}
}
return ESP_OK;
}
esp_err_t s_spi_slave_hd_append_rxdma(spi_slave_hd_slot_t *host, uint8_t *data, size_t len, void *arg)
{
spi_slave_hd_hal_context_t *hal = &host->hal;
//Check if there are enough available dma descriptors for software to use
int num_required = (len + LLDESC_MAX_NUM_PER_DESC - 1) / LLDESC_MAX_NUM_PER_DESC;
int not_recycled_desc_num = hal->rx_used_desc_cnt - hal->rx_recycled_desc_cnt;
int available_desc_num = hal->dma_desc_num - not_recycled_desc_num;
if (num_required > available_desc_num) {
return ESP_ERR_INVALID_STATE;
}
spicommon_dma_desc_setup_link(hal->rx_cur_desc->desc, data, len, false);
hal->rx_cur_desc->arg = arg;
if (!hal->rx_dma_started) {
hal->rx_dma_started = true;
//start a link
hal->rx_dma_tail = hal->rx_cur_desc;
spi_dma_reset(host->dma_ctx->rx_dma_chan);
spi_slave_hd_hal_hw_prepare_rx(hal);
spi_dma_start(host->dma_ctx->rx_dma_chan, hal->rx_cur_desc->desc);
} else {
//there is already a consecutive link
ADDR_DMA_2_CPU(hal->rx_dma_tail->desc)->next = hal->rx_cur_desc->desc;
hal->rx_dma_tail = hal->rx_cur_desc;
spi_dma_append(host->dma_ctx->rx_dma_chan);
}
//Move the current descriptor pointer according to the number of the linked descriptors
for (int i = 0; i < num_required; i++) {
hal->rx_used_desc_cnt++;
hal->rx_cur_desc++;
if (hal->rx_cur_desc == hal->dmadesc_rx + hal->dma_desc_num) {
hal->rx_cur_desc = hal->dmadesc_rx;
}
}
return ESP_OK;
}
//---------------------------------------------------------Segment Mode Transaction APIs-----------------------------------------------------------//
esp_err_t spi_slave_hd_queue_trans(spi_host_device_t host_id, spi_slave_chan_t chan, spi_slave_hd_data_t *trans, TickType_t timeout)
{
@ -682,7 +774,6 @@ esp_err_t spi_slave_hd_append_trans(spi_host_device_t host_id, spi_slave_chan_t
{
esp_err_t err;
spi_slave_hd_slot_t *host = spihost[host_id];
spi_slave_hd_hal_context_t *hal = &host->hal;
SPIHD_CHECK(trans->len <= SPI_MAX_DMA_LEN, "Currently we only support transaction with data length within 4092 bytes", ESP_ERR_INVALID_ARG);
SPIHD_CHECK(host->append_mode == 1, "This API should be used for SPI Slave HD Append Mode", ESP_ERR_INVALID_STATE);
@ -698,13 +789,13 @@ esp_err_t spi_slave_hd_append_trans(spi_host_device_t host_id, spi_slave_chan_t
if (ret == pdFALSE) {
return ESP_ERR_TIMEOUT;
}
err = spi_slave_hd_hal_txdma_append(hal, hd_priv_trans.aligned_buffer, trans->len, trans);
err = s_spi_slave_hd_append_txdma(host, hd_priv_trans.aligned_buffer, trans->len, trans);
} else {
BaseType_t ret = xSemaphoreTake(host->rx_cnting_sem, timeout);
if (ret == pdFALSE) {
return ESP_ERR_TIMEOUT;
}
err = spi_slave_hd_hal_rxdma_append(hal, hd_priv_trans.aligned_buffer, trans->len, trans);
err = s_spi_slave_hd_append_rxdma(host, hd_priv_trans.aligned_buffer, trans->len, trans);
}
if (err != ESP_OK) {
ESP_LOGE(TAG, "Wait until the DMA finishes its transaction");

2
components/hal/esp32s2/include/hal/spi_ll.h
View File

@ -1079,10 +1079,10 @@ static inline uint32_t spi_ll_slave_get_rcv_bitlen(spi_dev_t *hw)
item(SPI_LL_INTR_WRBUF, slave.int_wr_buf_done_en, slv_wrbuf_dlen.wr_buf_done, slv_wrbuf_dlen.wr_buf_done=0) \
item(SPI_LL_INTR_RDDMA, slave.int_rd_dma_done_en, slv_rd_byte.rd_dma_done, slv_rd_byte.rd_dma_done=0) \
item(SPI_LL_INTR_WRDMA, slave.int_wr_dma_done_en, slave1.wr_dma_done, slave1.wr_dma_done=0) \
item(SPI_LL_INTR_SEG_DONE, slave.int_dma_seg_trans_en, hold.dma_seg_trans_done, hold.dma_seg_trans_done=0) \
item(SPI_LL_INTR_IN_SUC_EOF, dma_int_ena.in_suc_eof, dma_int_raw.in_suc_eof, dma_int_clr.in_suc_eof=1) \
item(SPI_LL_INTR_OUT_EOF, dma_int_ena.out_eof, dma_int_raw.out_eof, dma_int_clr.out_eof=1) \
item(SPI_LL_INTR_OUT_TOTAL_EOF, dma_int_ena.out_total_eof, dma_int_raw.out_total_eof, dma_int_clr.out_total_eof=1) \
item(SPI_LL_INTR_SEG_DONE, slave.int_dma_seg_trans_en, hold.dma_seg_trans_done, hold.dma_seg_trans_done=0) \
item(SPI_LL_INTR_IN_FULL, dma_int_ena.infifo_full_err, dma_int_raw.infifo_full_err, dma_int_clr.infifo_full_err=1) \
item(SPI_LL_INTR_OUT_EMPTY, dma_int_ena.outfifo_empty_err, dma_int_raw.outfifo_empty_err, dma_int_clr.outfifo_empty_err=1) \
item(SPI_LL_INTR_CMD7, dma_int_ena.cmd7, dma_int_raw.cmd7, dma_int_clr.cmd7=1) \

37
components/hal/include/hal/spi_slave_hd_hal.h
View File

@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2015-2023 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -84,11 +84,7 @@ typedef struct {
/// Configuration of the HAL
typedef struct {
uint32_t host_id; ///< Host ID of the spi peripheral
spi_dma_dev_t *dma_in; ///< Input DMA(DMA -> RAM) peripheral register address
spi_dma_dev_t *dma_out; ///< Output DMA(RAM -> DMA) peripheral register address
bool dma_enabled; ///< DMA enabled or not
uint32_t tx_dma_chan; ///< TX DMA channel used.
uint32_t rx_dma_chan; ///< RX DMA channel used.
bool append_mode; ///< True for DMA append mode, false for segment mode
uint32_t spics_io_num; ///< CS GPIO pin for this device
uint8_t mode; ///< SPI mode (0-3)
@ -110,13 +106,10 @@ typedef struct {
/* address of the hardware */
spi_dev_t *dev; ///< Beginning address of the peripheral registers.
spi_dma_dev_t *dma_in; ///< Address of the DMA peripheral registers which stores the data received from a peripheral into RAM.
spi_dma_dev_t *dma_out; ///< Address of the DMA peripheral registers which transmits the data from RAM to a peripheral.
bool dma_enabled; ///< DMA enabled or not
uint32_t tx_dma_chan; ///< TX DMA channel used.
uint32_t rx_dma_chan; ///< RX DMA channel used.
bool append_mode; ///< True for DMA append mode, false for segment mode
uint32_t dma_desc_num; ///< Number of the available DMA descriptors. Calculated from ``bus_max_transfer_size``.
uint32_t current_eof_addr;
spi_slave_hd_hal_desc_append_t *tx_cur_desc; ///< Current TX DMA descriptor that could be linked (set up).
spi_slave_hd_hal_desc_append_t *tx_dma_head; ///< Head of the linked TX DMA descriptors which are not used by hardware
spi_slave_hd_hal_desc_append_t *tx_dma_tail; ///< Tail of the linked TX DMA descriptors which are not used by hardware
@ -165,7 +158,7 @@ bool spi_slave_hd_hal_check_clear_event(spi_slave_hd_hal_context_t* hal, spi_eve
bool spi_slave_hd_hal_check_disable_event(spi_slave_hd_hal_context_t* hal, spi_event_t ev);
/**
* @brief Enable to invole the ISR of corresponding event.
* @brief Enable to involve the ISR of corresponding event.
*
* @note The function, compared with :cpp:func:`spi_slave_hd_hal_enable_event_intr`, contains a
* workaround to force trigger the interrupt, even if the interrupt source cannot be initialized
@ -194,7 +187,7 @@ void spi_slave_hd_hal_enable_event_intr(spi_slave_hd_hal_context_t* hal, spi_eve
* @param[out] out_buf Buffer to receive the data
* @param len Maximul length to receive
*/
void spi_slave_hd_hal_rxdma(spi_slave_hd_hal_context_t *hal, uint8_t *out_buf, size_t len);
void spi_slave_hd_hal_rxdma(spi_slave_hd_hal_context_t *hal);
/**
* @brief Get the length of total received data
@ -204,6 +197,13 @@ void spi_slave_hd_hal_rxdma(spi_slave_hd_hal_context_t *hal, uint8_t *out_buf, s
*/
int spi_slave_hd_hal_rxdma_seg_get_len(spi_slave_hd_hal_context_t *hal);
/**
* @brief Prepare hardware for a new dma rx trans
*
* @param hal Context of the HAL layer
*/
void spi_slave_hd_hal_hw_prepare_rx(spi_slave_hd_hal_context_t *hal);
////////////////////////////////////////////////////////////////////////////////
// TX DMA
////////////////////////////////////////////////////////////////////////////////
@ -214,7 +214,14 @@ int spi_slave_hd_hal_rxdma_seg_get_len(spi_slave_hd_hal_context_t *hal);
* @param data Buffer of data to send
* @param len Size of the buffer, also the maximum length to send
*/
void spi_slave_hd_hal_txdma(spi_slave_hd_hal_context_t *hal, uint8_t *data, size_t len);
void spi_slave_hd_hal_txdma(spi_slave_hd_hal_context_t *hal);
/**
* @brief Prepare hardware for a new dma tx trans
*
* @param hal Context of the HAL layer
*/
void spi_slave_hd_hal_hw_prepare_tx(spi_slave_hd_hal_context_t *hal);
////////////////////////////////////////////////////////////////////////////////
// Shared buffer
@ -223,7 +230,7 @@ void spi_slave_hd_hal_txdma(spi_slave_hd_hal_context_t *hal, uint8_t *data, size
* @brief Read from the shared register buffer
*
* @param hal Context of the HAL layer
* @param addr Address of the shared regsiter to read
* @param addr Address of the shared register to read
* @param out_data Buffer to store the read data
* @param len Length to read from the shared buffer
*/
@ -294,7 +301,7 @@ bool spi_slave_hd_hal_get_rx_finished_trans(spi_slave_hd_hal_context_t *hal, voi
* @param hal Context of the HAL layer
* @param data Buffer of the transaction data
* @param len Length of the data
* @param arg Pointer used by the caller to indicate the tranaction. Will be returned by ``spi_slave_hd_hal_get_tx_finished_trans`` when transaction is finished
* @param arg Pointer used by the caller to indicate the transaction. Will be returned by ``spi_slave_hd_hal_get_tx_finished_trans`` when transaction is finished
* @return
* - ESP_OK: on success
* - ESP_ERR_INVALID_STATE: Function called in invalid state.
@ -307,7 +314,7 @@ esp_err_t spi_slave_hd_hal_txdma_append(spi_slave_hd_hal_context_t *hal, uint8_t
* @param hal Context of the HAL layer
* @param data Buffer of the transaction data
* @param len Length of the data
* @param arg Pointer used by the caller to indicate the tranaction. Will be returned by ``spi_slave_hd_hal_get_rx_finished_trans`` when transaction is finished
* @param arg Pointer used by the caller to indicate the transaction. Will be returned by ``spi_slave_hd_hal_get_rx_finished_trans`` when transaction is finished
* @return
* - ESP_OK: on success
* - ESP_ERR_INVALID_STATE: Function called in invalid state.

226
components/hal/spi_slave_hd_hal.c
View File

@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2015-2023 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -14,79 +14,21 @@
#include "soc/spi_periph.h"
#include "soc/lldesc.h"
#include "soc/soc_caps.h"
#include "soc/ext_mem_defs.h"
#include "hal/spi_slave_hd_hal.h"
#include "hal/assert.h"
//This GDMA related part will be introduced by GDMA dedicated APIs in the future. Here we temporarily use macros.
#if SOC_GDMA_SUPPORTED
#if (SOC_GDMA_TRIG_PERIPH_SPI2_BUS == SOC_GDMA_BUS_AHB) && (SOC_AHB_GDMA_VERSION == 1)
#include "soc/gdma_struct.h"
#include "hal/gdma_ll.h"
#define spi_dma_ll_tx_restart(dev, chan) gdma_ll_tx_restart(&GDMA, chan)
#define spi_dma_ll_rx_restart(dev, chan) gdma_ll_rx_restart(&GDMA, chan)
#define spi_dma_ll_rx_reset(dev, chan) gdma_ll_rx_reset_channel(&GDMA, chan)
#define spi_dma_ll_tx_reset(dev, chan) gdma_ll_tx_reset_channel(&GDMA, chan)
#define spi_dma_ll_enable_out_auto_wrback(dev, chan, enable) gdma_ll_tx_enable_auto_write_back(&GDMA, chan, enable)
#define spi_dma_ll_set_out_eof_generation(dev, chan, enable) gdma_ll_tx_set_eof_mode(&GDMA, chan, enable)
#define spi_dma_ll_get_out_eof_desc_addr(dev, chan) gdma_ll_tx_get_eof_desc_addr(&GDMA, chan)
#define spi_dma_ll_get_in_suc_eof_desc_addr(dev, chan) gdma_ll_rx_get_success_eof_desc_addr(&GDMA, chan)
#define spi_dma_ll_rx_start(dev, chan, addr) do {\
gdma_ll_rx_set_desc_addr(&GDMA, chan, (uint32_t)addr);\
gdma_ll_rx_start(&GDMA, chan);\
} while (0)
#define spi_dma_ll_tx_start(dev, chan, addr) do {\
gdma_ll_tx_set_desc_addr(&GDMA, chan, (uint32_t)addr);\
gdma_ll_tx_start(&GDMA, chan);\
} while (0)
#elif (SOC_GDMA_TRIG_PERIPH_SPI2_BUS == SOC_GDMA_BUS_AXI)
#include "hal/axi_dma_ll.h"
#define spi_dma_ll_tx_restart(dev, chan) axi_dma_ll_tx_restart(&AXI_DMA, chan)
#define spi_dma_ll_rx_restart(dev, chan) axi_dma_ll_rx_restart(&AXI_DMA, chan)
#define spi_dma_ll_rx_reset(dev, chan) axi_dma_ll_rx_reset_channel(&AXI_DMA, chan)
#define spi_dma_ll_tx_reset(dev, chan) axi_dma_ll_tx_reset_channel(&AXI_DMA, chan)
#define spi_dma_ll_enable_out_auto_wrback(dev, chan, enable) axi_dma_ll_tx_enable_auto_write_back(&AXI_DMA, chan, enable)
#define spi_dma_ll_set_out_eof_generation(dev, chan, enable) axi_dma_ll_tx_set_eof_mode(&AXI_DMA, chan, enable)
#define spi_dma_ll_get_out_eof_desc_addr(dev, chan) axi_dma_ll_tx_get_eof_desc_addr(&AXI_DMA, chan)
#define spi_dma_ll_get_in_suc_eof_desc_addr(dev, chan) axi_dma_ll_rx_get_success_eof_desc_addr(&AXI_DMA, chan)
#define spi_dma_ll_rx_start(dev, chan, addr) do {\
axi_dma_ll_rx_set_desc_addr(&AXI_DMA, chan, (uint32_t)addr);\
axi_dma_ll_rx_start(&AXI_DMA, chan);\
} while (0)
#define spi_dma_ll_tx_start(dev, chan, addr) do {\
axi_dma_ll_tx_set_desc_addr(&AXI_DMA, chan, (uint32_t)addr);\
axi_dma_ll_tx_start(&AXI_DMA, chan);\
} while (0)
#endif
#endif //SOC_GDMA_SUPPORTED
static void s_spi_slave_hd_hal_dma_init_config(const spi_slave_hd_hal_context_t *hal)
{
spi_dma_ll_enable_out_auto_wrback(hal->dma_out, hal->tx_dma_chan, 1);
spi_dma_ll_set_out_eof_generation(hal->dma_out, hal->tx_dma_chan, 1);
}
void spi_slave_hd_hal_init(spi_slave_hd_hal_context_t *hal, const spi_slave_hd_hal_config_t *hal_config)
{
spi_dev_t *hw = SPI_LL_GET_HW(hal_config->host_id);
hal->dev = hw;
hal->dma_in = hal_config->dma_in;
hal->dma_out = hal_config->dma_out;
hal->dma_enabled = hal_config->dma_enabled;
hal->tx_dma_chan = hal_config->tx_dma_chan;
hal->rx_dma_chan = hal_config->rx_dma_chan;
hal->append_mode = hal_config->append_mode;
hal->tx_cur_desc = hal->dmadesc_tx;
hal->rx_cur_desc = hal->dmadesc_rx;
hal->tx_dma_head = hal->dmadesc_tx + hal->dma_desc_num -1;
hal->rx_dma_head = hal->dmadesc_rx + hal->dma_desc_num -1;
//Configure slave
if (hal_config->dma_enabled) {
s_spi_slave_hd_hal_dma_init_config(hal);
}
spi_ll_slave_hd_init(hw);
spi_ll_set_addr_bitlen(hw, hal_config->address_bits);
spi_ll_set_command_bitlen(hw, hal_config->command_bits);
@ -115,11 +57,8 @@ void spi_slave_hd_hal_init(spi_slave_hd_hal_context_t *hal, const spi_slave_hd_h
spi_ll_set_intr(hw, SPI_LL_INTR_TRANS_DONE);
}
} else {
#if SOC_GDMA_SUPPORTED
spi_ll_enable_intr(hw, SPI_LL_INTR_CMD7);
#else
spi_ll_clear_intr(hw, SPI_LL_INTR_OUT_EOF | SPI_LL_INTR_CMD7);
spi_ll_enable_intr(hw, SPI_LL_INTR_OUT_EOF | SPI_LL_INTR_CMD7);
#if !SOC_GDMA_SUPPORTED
spi_ll_enable_intr(hw, SPI_LL_INTR_CMD7 | SPI_LL_INTR_CMD8);
#endif //SOC_GDMA_SUPPORTED
}
@ -132,42 +71,14 @@ void spi_slave_hd_hal_init(spi_slave_hd_hal_context_t *hal, const spi_slave_hd_h
}
#if SOC_NON_CACHEABLE_OFFSET
#define ADDR_DMA_2_CPU(addr) ((typeof(addr))((uint32_t)(addr) + 0x40000000))
#define ADDR_CPU_2_DMA(addr) ((typeof(addr))((uint32_t)(addr) - 0x40000000))
#include "hal/cache_ll.h"
#define ADDR_DMA_2_CPU(addr) ((typeof(addr))CACHE_LL_L2MEM_NON_CACHE_ADDR(addr))
#define ADDR_CPU_2_DMA(addr) ((typeof(addr))CACHE_LL_L2MEM_CACHE_ADDR(addr))
#else
#define ADDR_DMA_2_CPU(addr) (addr)
#define ADDR_CPU_2_DMA(addr) (addr)
#endif
static void s_spi_hal_dma_desc_setup_link(spi_dma_desc_t *dmadesc, const void *data, int len, bool is_rx)
{
dmadesc = ADDR_DMA_2_CPU(dmadesc);
int n = 0;
while (len) {
int dmachunklen = len;
if (dmachunklen > DMA_DESCRIPTOR_BUFFER_MAX_SIZE_4B_ALIGNED) {
dmachunklen = DMA_DESCRIPTOR_BUFFER_MAX_SIZE_4B_ALIGNED;
}
if (is_rx) {
//Receive needs DMA length rounded to next 32-bit boundary
dmadesc[n].dw0.size = (dmachunklen + 3) & (~3);
dmadesc[n].dw0.length = (dmachunklen + 3) & (~3);
} else {
dmadesc[n].dw0.size = dmachunklen;
dmadesc[n].dw0.length = dmachunklen;
}
dmadesc[n].buffer = (uint8_t *)data;
dmadesc[n].dw0.suc_eof = 0;
dmadesc[n].dw0.owner = 1;
dmadesc[n].next = ADDR_CPU_2_DMA(&dmadesc[n + 1]);
len -= dmachunklen;
data += dmachunklen;
n++;
}
dmadesc[n - 1].dw0.suc_eof = 1; //Mark last DMA desc as end of stream.
dmadesc[n - 1].next = NULL;
}
static int s_desc_get_received_len_addr(spi_dma_desc_t* head, spi_dma_desc_t** out_next, void **out_buff_head)
{
spi_dma_desc_t* desc_cpu = ADDR_DMA_2_CPU(head);
@ -188,41 +99,38 @@ static int s_desc_get_received_len_addr(spi_dma_desc_t* head, spi_dma_desc_t** o
return len;
}
void spi_slave_hd_hal_rxdma(spi_slave_hd_hal_context_t *hal, uint8_t *out_buf, size_t len)
void spi_slave_hd_hal_hw_prepare_rx(spi_slave_hd_hal_context_t *hal)
{
s_spi_hal_dma_desc_setup_link(hal->dmadesc_rx->desc, out_buf, len, true);
spi_ll_dma_rx_fifo_reset(hal->dev);
spi_dma_ll_rx_reset(hal->dma_in, hal->rx_dma_chan);
spi_ll_slave_reset(hal->dev);
spi_ll_infifo_full_clr(hal->dev);
spi_ll_clear_intr(hal->dev, SPI_LL_INTR_CMD7);
spi_ll_dma_rx_enable(hal->dev, 1);
spi_dma_ll_rx_start(hal->dma_in, hal->rx_dma_chan, (lldesc_t *)hal->dmadesc_rx->desc);
}
void spi_slave_hd_hal_txdma(spi_slave_hd_hal_context_t *hal, uint8_t *data, size_t len)
void spi_slave_hd_hal_hw_prepare_tx(spi_slave_hd_hal_context_t *hal)
{
s_spi_hal_dma_desc_setup_link(hal->dmadesc_tx->desc, data, len, false);
spi_ll_dma_tx_fifo_reset(hal->dev);
spi_dma_ll_tx_reset(hal->dma_out, hal->tx_dma_chan);
spi_ll_slave_reset(hal->dev);
spi_ll_outfifo_empty_clr(hal->dev);
spi_ll_clear_intr(hal->dev, SPI_LL_INTR_CMD8);
spi_ll_dma_tx_enable(hal->dev, 1);
spi_dma_ll_tx_start(hal->dma_out, hal->tx_dma_chan, (lldesc_t *)hal->dmadesc_tx->desc);
}
void spi_slave_hd_hal_rxdma(spi_slave_hd_hal_context_t *hal)
{
spi_ll_slave_reset(hal->dev);
spi_ll_clear_intr(hal->dev, SPI_LL_INTR_CMD7);
spi_slave_hd_hal_hw_prepare_rx(hal);
}
void spi_slave_hd_hal_txdma(spi_slave_hd_hal_context_t *hal)
{
spi_ll_slave_reset(hal->dev);
spi_ll_clear_intr(hal->dev, SPI_LL_INTR_CMD8);
spi_slave_hd_hal_hw_prepare_tx(hal);
}
static spi_ll_intr_t get_event_intr(spi_slave_hd_hal_context_t *hal, spi_event_t ev)
{
spi_ll_intr_t intr = 0;
#if CONFIG_IDF_TARGET_ESP32S2
if ((ev & SPI_EV_SEND) && hal->append_mode) intr |= SPI_LL_INTR_OUT_EOF;
#endif
if ((ev & SPI_EV_SEND) && !hal->append_mode) intr |= SPI_LL_INTR_CMD8;
if (ev & SPI_EV_SEND) intr |= SPI_LL_INTR_CMD8;
if (ev & SPI_EV_RECV) intr |= SPI_LL_INTR_CMD7;
if (ev & SPI_EV_BUF_TX) intr |= SPI_LL_INTR_RDBUF;
if (ev & SPI_EV_BUF_RX) intr |= SPI_LL_INTR_WRBUF;
@ -315,8 +223,7 @@ int spi_slave_hd_hal_rxdma_seg_get_len(spi_slave_hd_hal_context_t *hal)
bool spi_slave_hd_hal_get_tx_finished_trans(spi_slave_hd_hal_context_t *hal, void **out_trans, void **real_buff_addr)
{
uint32_t desc_now = spi_dma_ll_get_out_eof_desc_addr(hal->dma_out, hal->tx_dma_chan);
if ((uint32_t)hal->tx_dma_head->desc == desc_now) {
if ((uint32_t)hal->tx_dma_head->desc == hal->current_eof_addr) {
return false;
}
@ -333,8 +240,7 @@ bool spi_slave_hd_hal_get_tx_finished_trans(spi_slave_hd_hal_context_t *hal, voi
bool spi_slave_hd_hal_get_rx_finished_trans(spi_slave_hd_hal_context_t *hal, void **out_trans, void **real_buff_addr, size_t *out_len)
{
uint32_t desc_now = spi_dma_ll_get_in_suc_eof_desc_addr(hal->dma_in, hal->rx_dma_chan);
if ((uint32_t)hal->rx_dma_head->desc == desc_now) {
if ((uint32_t)hal->rx_dma_head->desc == hal->current_eof_addr) {
return false;
}
@ -348,85 +254,3 @@ bool spi_slave_hd_hal_get_rx_finished_trans(spi_slave_hd_hal_context_t *hal, voi
hal->rx_recycled_desc_cnt++;
return true;
}
esp_err_t spi_slave_hd_hal_txdma_append(spi_slave_hd_hal_context_t *hal, uint8_t *data, size_t len, void *arg)
{
//Check if there are enough available DMA descriptors for software to use
int num_required = (len + LLDESC_MAX_NUM_PER_DESC - 1) / LLDESC_MAX_NUM_PER_DESC;
int not_recycled_desc_num = hal->tx_used_desc_cnt - hal->tx_recycled_desc_cnt;
int available_desc_num = hal->dma_desc_num - not_recycled_desc_num;
if (num_required > available_desc_num) {
return ESP_ERR_INVALID_STATE;
}
s_spi_hal_dma_desc_setup_link(hal->tx_cur_desc->desc, data, len, false);
hal->tx_cur_desc->arg = arg;
if (!hal->tx_dma_started) {
hal->tx_dma_started = true;
//start a link
hal->tx_dma_tail = hal->tx_cur_desc;
spi_ll_dma_tx_fifo_reset(hal->dma_out);
spi_ll_outfifo_empty_clr(hal->dev);
spi_dma_ll_tx_reset(hal->dma_out, hal->tx_dma_chan);
spi_ll_dma_tx_enable(hal->dev, 1);
spi_dma_ll_tx_start(hal->dma_out, hal->tx_dma_chan, (lldesc_t *)hal->tx_cur_desc->desc);
} else {
//there is already a consecutive link
ADDR_DMA_2_CPU(hal->tx_dma_tail->desc)->next = hal->tx_cur_desc->desc;
hal->tx_dma_tail = hal->tx_cur_desc;
spi_dma_ll_tx_restart(hal->dma_out, hal->tx_dma_chan);
}
//Move the current descriptor pointer according to the number of the linked descriptors
for (int i = 0; i < num_required; i++) {
hal->tx_used_desc_cnt++;
hal->tx_cur_desc++;
if (hal->tx_cur_desc == hal->dmadesc_tx + hal->dma_desc_num) {
hal->tx_cur_desc = hal->dmadesc_tx;
}
}
return ESP_OK;
}
esp_err_t spi_slave_hd_hal_rxdma_append(spi_slave_hd_hal_context_t *hal, uint8_t *data, size_t len, void *arg)
{
//Check if there are enough available dma descriptors for software to use
int num_required = (len + LLDESC_MAX_NUM_PER_DESC - 1) / LLDESC_MAX_NUM_PER_DESC;
int not_recycled_desc_num = hal->rx_used_desc_cnt - hal->rx_recycled_desc_cnt;
int available_desc_num = hal->dma_desc_num - not_recycled_desc_num;
if (num_required > available_desc_num) {
return ESP_ERR_INVALID_STATE;
}
s_spi_hal_dma_desc_setup_link(hal->rx_cur_desc->desc, data, len, false);
hal->rx_cur_desc->arg = arg;
if (!hal->rx_dma_started) {
hal->rx_dma_started = true;
//start a link
hal->rx_dma_tail = hal->rx_cur_desc;
spi_dma_ll_rx_reset(hal->dma_in, hal->rx_dma_chan);
spi_ll_dma_rx_fifo_reset(hal->dma_in);
spi_ll_infifo_full_clr(hal->dev);
spi_ll_dma_rx_enable(hal->dev, 1);
spi_dma_ll_rx_start(hal->dma_in, hal->rx_dma_chan, (lldesc_t *)hal->rx_cur_desc->desc);
} else {
//there is already a consecutive link
ADDR_DMA_2_CPU(hal->rx_dma_tail->desc)->next = hal->rx_cur_desc->desc;
hal->rx_dma_tail = hal->rx_cur_desc;
spi_dma_ll_rx_restart(hal->dma_in, hal->rx_dma_chan);
}
//Move the current descriptor pointer according to the number of the linked descriptors
for (int i = 0; i < num_required; i++) {
hal->rx_used_desc_cnt++;
hal->rx_cur_desc++;
if (hal->rx_cur_desc == hal->dmadesc_rx + hal->dma_desc_num) {
hal->rx_cur_desc = hal->dmadesc_rx;
}
}
return ESP_OK;
}