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esp_eth: EMAC start/stop optimization

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This commit is contained in:
Ondrej Kosta 2022-01-26 09:55:36 +01:00
parent c469316970
commit d53094bdc0
5 changed files with 42 additions and 48 deletions
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20
components/esp_eth/src/esp_eth.c
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@ -1,16 +1,8 @@
// Copyright 2019-2021 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/*
* SPDX-FileCopyrightText: 2019-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <sys/cdefs.h>
#include <stdatomic.h>
@ -270,13 +262,11 @@ esp_err_t esp_eth_start(esp_eth_handle_t hdl)
esp_eth_driver_t *eth_driver = (esp_eth_driver_t *)hdl;
ESP_GOTO_ON_FALSE(eth_driver, ESP_ERR_INVALID_ARG, err, TAG, "ethernet driver handle can't be null");
esp_eth_phy_t *phy = eth_driver->phy;
esp_eth_mac_t *mac = eth_driver->mac;
// check if driver has stopped
esp_eth_fsm_t expected_fsm = ESP_ETH_FSM_STOP;
ESP_GOTO_ON_FALSE(atomic_compare_exchange_strong(&eth_driver->fsm, &expected_fsm, ESP_ETH_FSM_START),
ESP_ERR_INVALID_STATE, err, TAG, "driver started already");
ESP_GOTO_ON_ERROR(phy->negotiate(phy), err, TAG, "phy negotiation failed");
ESP_GOTO_ON_ERROR(mac->start(mac), err, TAG, "start mac failed");
ESP_GOTO_ON_ERROR(esp_event_post(ETH_EVENT, ETHERNET_EVENT_START, &eth_driver, sizeof(esp_eth_driver_t *), 0),
err, TAG, "send ETHERNET_EVENT_START event failed");
ESP_GOTO_ON_ERROR(phy->get_link(phy), err, TAG, "phy get link status failed");

32
components/esp_eth/src/esp_eth_mac_esp.c
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@ -1,16 +1,8 @@
// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/*
* SPDX-FileCopyrightText: 2019-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <string.h>
#include <stdlib.h>
#include <sys/cdefs.h>
@ -41,7 +33,7 @@
static const char *TAG = "esp.emac";
#define PHY_OPERATION_TIMEOUT_US (1000)
#define MAC_STOP_TIMEOUT_MS (100)
#define MAC_STOP_TIMEOUT_US (250)
#define FLOW_CONTROL_LOW_WATER_MARK (CONFIG_ETH_DMA_RX_BUFFER_NUM / 3)
#define FLOW_CONTROL_HIGH_WATER_MARK (FLOW_CONTROL_LOW_WATER_MARK * 2)
@ -72,6 +64,8 @@ typedef struct {
static esp_err_t esp_emac_alloc_driver_obj(const eth_mac_config_t *config, emac_esp32_t **emac_out_hdl, void **out_descriptors);
static void esp_emac_free_driver_obj(emac_esp32_t *emac, void *descriptors);
static esp_err_t emac_esp32_start(esp_eth_mac_t *mac);
static esp_err_t emac_esp32_stop(esp_eth_mac_t *mac);
static esp_err_t emac_esp32_set_mediator(esp_eth_mac_t *mac, esp_eth_mediator_t *eth)
{
@ -158,11 +152,11 @@ static esp_err_t emac_esp32_set_link(esp_eth_mac_t *mac, eth_link_t link)
switch (link) {
case ETH_LINK_UP:
ESP_GOTO_ON_ERROR(esp_intr_enable(emac->intr_hdl), err, TAG, "enable interrupt failed");
emac_hal_start(&emac->hal);
emac_esp32_start(mac);
break;
case ETH_LINK_DOWN:
ESP_GOTO_ON_ERROR(esp_intr_disable(emac->intr_hdl), err, TAG, "disable interrupt failed");
emac_hal_stop(&emac->hal);
emac_esp32_stop(mac);
break;
default:
ESP_GOTO_ON_FALSE(false, ESP_ERR_INVALID_ARG, err, TAG, "unknown link status");
@ -404,9 +398,9 @@ static esp_err_t emac_esp32_stop(esp_eth_mac_t *mac)
if ((ret = emac_hal_stop(&emac->hal)) == ESP_OK) {
break;
}
to += 20;
vTaskDelay(pdMS_TO_TICKS(20));
} while (to < MAC_STOP_TIMEOUT_MS);
to += 25;
esp_rom_delay_us(25);
} while (to < MAC_STOP_TIMEOUT_US);
return ret;
}

27
components/hal/emac_hal.c
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@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -337,17 +337,16 @@ void emac_hal_start(emac_hal_context_t *hal)
/* Flush Transmit FIFO */
emac_ll_flush_trans_fifo_enable(hal->dma_regs, true);
/* Flush Receive FIFO */
emac_ll_flush_recv_frame_enable(hal->dma_regs, true);
/* Start DMA transmission */
emac_ll_start_stop_dma_transmit(hal->dma_regs, true);
/* Start DMA reception */
emac_ll_start_stop_dma_receive(hal->dma_regs, true);
/* Enable transmit state machine of the MAC for transmission on the MII */
emac_ll_transmit_enable(hal->mac_regs, true);
/* Enable receive state machine of the MAC for reception from the MII */
emac_ll_receive_enable(hal->mac_regs, true);
/* Start DMA transmission */
emac_ll_start_stop_dma_transmit(hal->dma_regs, true);
/* Start DMA reception */
emac_ll_start_stop_dma_receive(hal->dma_regs, true);
/* Clear all pending interrupts */
emac_ll_clear_all_pending_intr(hal->dma_regs);
@ -357,18 +356,24 @@ esp_err_t emac_hal_stop(emac_hal_context_t *hal)
{
/* Stop DMA transmission */
emac_ll_start_stop_dma_transmit(hal->dma_regs, false);
/* Stop DMA reception */
emac_ll_start_stop_dma_receive(hal->dma_regs, false);
if (emac_ll_transmit_frame_ctrl_status(hal->mac_regs) != 0x0) {
/* Previous transmit in progress */
return ESP_ERR_INVALID_STATE;
}
/* Disable receive state machine of the MAC for reception from the MII */
emac_ll_transmit_enable(hal->mac_regs, false);
/* Disable transmit state machine of the MAC for transmission on the MII */
emac_ll_receive_enable(hal->mac_regs, false);
/* Disable receive state machine of the MAC for reception from the MII */
emac_ll_transmit_enable(hal->mac_regs, false);
if (emac_ll_receive_read_ctrl_state(hal->mac_regs) != 0x0) {
/* Previous receive copy in progress */
return ESP_ERR_INVALID_STATE;
}
/* Stop DMA reception */
emac_ll_start_stop_dma_receive(hal->dma_regs, false);
/* Disable Ethernet MAC and DMA Interrupt */
emac_ll_disable_all_intr(hal->dma_regs);

7
components/hal/esp32/include/hal/emac_ll.h
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@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -342,6 +342,11 @@ static inline uint32_t emac_ll_transmit_frame_ctrl_status(emac_mac_dev_t *mac_re
return mac_regs->emacdebug.mactfcs;
}
static inline uint32_t emac_ll_receive_read_ctrl_state(emac_mac_dev_t *mac_regs)
{
return mac_regs->emacdebug.mtlrfrcs;
}
/* emacmiidata */
static inline void emac_ll_set_phy_data(emac_mac_dev_t *mac_regs, uint32_t data)
{

4
components/hal/include/hal/emac_hal.h
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@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -225,7 +225,7 @@ void emac_hal_start(emac_hal_context_t *hal);
* @param hal EMAC HAL context infostructure
* @return
* - ESP_OK: succeed
* - ESP_ERR_INVALID_STATE: previous frame transmission is not completed. When this error occurs,
* - ESP_ERR_INVALID_STATE: previous frame transmission/reception is not completed. When this error occurs,
* wait and reapeat the EMAC stop again.
*/
esp_err_t emac_hal_stop(emac_hal_context_t *hal);