c78081e5cf
Allow configuring MTU for CMUX. Some AT manual and specification define this as a frame size. Linux ldattach default to 127 bytes, 3GPP TS 27.010 defaults to 31. We should limit our CMUX frames to a size that remote end is capable of handling. Linux silently drops oversized frames. Also, remove MODEM_CELLULAR_CMUX_MAX_FRAME_SIZE as this was only limiting a buffer sizes, and resulted CMUX frames to be capped to same value. Use MODEM_CMUX_WORK_BUFFER_SIZE and MODEM_CMUX_MTU instead. Also rename CONFIG_MODEM_CELLULAR_CHAT_BUFFER_SIZES to CONFIG_MODEM_CELLULAR_CHAT_BUFFER_SIZE as it is now only used as a Chat module. DLCI pipes use CONFIG_MODEM_CMUX_WORK_BUFFER_SIZE. Signed-off-by: Seppo Takalo <seppo.takalo@nordicsemi.no>
126 lines
2.7 KiB
Plaintext
126 lines
2.7 KiB
Plaintext
# Copyright (c) 2023 Trackunit Corporation
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# SPDX-License-Identifier: Apache-2.0
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menuconfig MODEM_MODULES
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bool "Modem modules"
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select EXPERIMENTAL
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if MODEM_MODULES
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config MODEM_CHAT
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bool "Modem chat module"
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select RING_BUFFER
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select MODEM_PIPE
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if MODEM_CHAT
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config MODEM_CHAT_LOG_BUFFER_SIZE
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int "Modem chat log buffer size in bytes"
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default 128
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endif
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config MODEM_CMUX
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bool "Modem CMUX module"
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select MODEM_PIPE
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select RING_BUFFER
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select EVENTS
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select CRC
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if MODEM_CMUX
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config MODEM_CMUX_DEFAULT_MTU_127
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bool
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default y if (DT_HAS_QUECTEL_BG95_ENABLED || DT_HAS_QUECTEL_EG25_G_ENABLED || \
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DT_HAS_SIMCOM_SIM7080_ENABLED || DT_HAS_U_BLOX_SARA_R4_ENABLED || \
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DT_HAS_U_BLOX_SARA_R5_ENABLED || DT_HAS_SWIR_HL7800_ENABLED || \
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DT_HAS_TELIT_ME910G1_ENABLED || DT_HAS_TELIT_ME310G1_ENABLED || \
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DT_HAS_SQN_GM02S_ENABLED)
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help
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Use the default MTU size of 127 bytes for the CMUX module on certain modems.
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This must match the AT+CMUX commands in the modem_cellular driver.
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config MODEM_CMUX_MTU
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int "CMUX MTU size in bytes"
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range 16 1500
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default 127 if MODEM_CMUX_DEFAULT_MTU_127
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default 31
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help
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Maximum Transmission Unit (MTU) size for the CMUX module.
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Linux ldattach defaults to 127 bytes, 3GPP TS 27.010 to 31.
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config MODEM_CMUX_WORK_BUFFER_SIZE
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int "CMUX module work buffer size in bytes"
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range 23 1507
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default 134 if MODEM_CMUX_DEFAULT_MTU_127
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default 38
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help
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Size of the work buffer used by the CMUX module.
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Recommended size is MODEM_CMUX_MTU + 7 (CMUX header size).
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module = MODEM_CMUX
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module-str = modem_cmux
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source "subsys/logging/Kconfig.template.log_config"
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endif
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config MODEM_PIPE
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bool "Modem pipe module"
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select EVENTS
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config MODEM_PIPELINK
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bool "Modem pipelink module"
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depends on MODEM_PIPE
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config MODEM_PPP
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bool "Modem PPP module"
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depends on NET_L2_PPP
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select MODEM_PIPE
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select RING_BUFFER
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select CRC
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if MODEM_PPP
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config MODEM_PPP_NET_BUF_FRAG_SIZE
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int "Network buffer fragment size"
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default NET_BUF_DATA_SIZE if NET_BUF_FIXED_DATA_SIZE
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default 128
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endif
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config MODEM_STATS
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bool "Modem statistics"
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depends on SHELL
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help
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Enables modem statistics shell commands which track the usage of
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buffers across the modem modules. The statistics are useful for
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scaling buffer sizes, as these are application specific.
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config MODEM_STATS_BUFFER_NAME_SIZE
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int "Maximum string size of modem stats buffer name"
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default 32
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range 8 64
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config MODEM_UBX
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bool "Modem U-BLOX module"
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select RING_BUFFER
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select MODEM_PIPE
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help
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Enable Modem U-BLOX module.
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if MODEM_UBX
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config MODEM_UBX_LOG_BUFFER
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int "Modem U-BLOX log buffer size"
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default 128
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endif
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module = MODEM_MODULES
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module-str = modem_modules
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source "subsys/logging/Kconfig.template.log_config"
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rsource "backends/Kconfig"
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endif
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