Merge branch 'fix/ff_sdmmc_status_check_optional' into 'master'

fatfs: Add option to mock ff_sdmmc_status output to increase IO speed

Closes IDF-4788

See merge request espressif/esp-idf!18300

components/fatfs/diskio/diskio_sdmmc.c

@@ -12,6 +12,7 @@
 #include "esp_compiler.h"
 
 static sdmmc_card_t* s_cards[FF_VOLUMES] = { NULL };
+static bool s_disk_status_check_en[FF_VOLUMES] = { };
 
 static const char* TAG = "diskio_sdmmc";
 
@@ -40,8 +41,11 @@ DSTATUS ff_sdmmc_initialize (BYTE pdrv)
 
 DSTATUS ff_sdmmc_status(BYTE pdrv)
 {
+    if (s_disk_status_check_en[pdrv]) {
         return ff_sdmmc_card_available(pdrv);
     }
+    return 0;
+}
 
 DRESULT ff_sdmmc_read (BYTE pdrv, BYTE* buff, DWORD sector, UINT count)
 {
@@ -108,6 +112,11 @@ DRESULT ff_sdmmc_ioctl (BYTE pdrv, BYTE cmd, void* buff)
     return RES_ERROR;
 }
 
+void ff_sdmmc_set_disk_status_check(BYTE pdrv, bool enable)
+{
+    s_disk_status_check_en[pdrv] = enable;
+}
+
 void ff_diskio_register_sdmmc(BYTE pdrv, sdmmc_card_t* card)
 {
     static const ff_diskio_impl_t sdmmc_impl = {
@@ -118,6 +127,7 @@ void ff_diskio_register_sdmmc(BYTE pdrv, sdmmc_card_t* card)
         .ioctl = &ff_sdmmc_ioctl
     };
     s_cards[pdrv] = card;
+    s_disk_status_check_en[pdrv] = false;
     ff_diskio_register(pdrv, &sdmmc_impl);
 }
 

components/fatfs/diskio/diskio_sdmmc.h

@@ -1,16 +1,8 @@
-// Copyright 2017-2019 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: 2017-2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #pragma once
 
@@ -21,6 +13,14 @@
 extern "C" {
 #endif
 
+/**
+ * @brief Enable/disable SD card status checking
+ *
+ * @param pdrv   drive number
+ * @param enable mock ff_sdmmc_status function (return 0)
+ */
+void ff_sdmmc_set_disk_status_check(BYTE pdrv, bool enable);
+
 /**
  * Register SD/MMC diskio driver
  *

components/fatfs/vfs/esp_vfs_fat.h

@@ -85,6 +85,17 @@ typedef struct {
      * sector size.
      */
     size_t allocation_unit_size;
+    /**
+     * Enables real ff_disk_status function implementation for SD cards
+     * (ff_sdmmc_status). Possibly slows down IO performance.
+     *
+     * Try to enable if you need to handle situations when SD cards
+     * are not unmounted properly before physical removal
+     * or you are experiencing issues with SD cards.
+     *
+     * Doesn't do anything for other memory storage media.
+     */
+    bool disk_status_check_enable;
 } esp_vfs_fat_mount_config_t;
 
 // Compatibility definition

components/fatfs/vfs/vfs_fat_sdmmc.c

@@ -85,6 +85,7 @@ static esp_err_t mount_to_vfs_fat(const esp_vfs_fat_mount_config_t *mount_config
     FATFS* fs = NULL;
     esp_err_t err;
     ff_diskio_register_sdmmc(pdrv, card);
+    ff_sdmmc_set_disk_status_check(pdrv, mount_config->disk_status_check_enable);
     ESP_LOGD(TAG, "using pdrv=%i", pdrv);
     char drv[3] = {(char)('0' + pdrv), ':', 0};
 

docs/sphinx-known-warnings.txt

@@ -38,3 +38,5 @@ wear-levelling.rst:line: WARNING: Duplicate C++ declaration, also defined at api
 Declaration is '.. cpp:member:: int max_files'.
 wear-levelling.rst:line: WARNING: Duplicate C++ declaration, also defined at api-reference/storage/fatfs:line.
 Declaration is '.. cpp:member:: size_t allocation_unit_size'.
+wear-levelling.rst:line: WARNING: Duplicate C++ declaration, also defined at api-reference/storage/fatfs:line.
+Declaration is '.. cpp:member:: bool disk_status_check_enable'.

tools/ci/check_copyright_ignore.txt

@@ -727,7 +727,6 @@ components/fatfs/diskio/diskio.c
 components/fatfs/diskio/diskio_impl.h
 components/fatfs/diskio/diskio_rawflash.c
 components/fatfs/diskio/diskio_rawflash.h
-components/fatfs/diskio/diskio_sdmmc.h
 components/fatfs/diskio/diskio_wl.h
 components/fatfs/port/freertos/ffsystem.c
 components/fatfs/port/linux/ffsystem.c