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The first stage of loopback-ism was implemented as part of the SMC module [1]. Now that we have the dibs layer, provide access to a dibs_loopback device to all dibs clients. This is the first step of moving loopback-ism from net/smc/smc_loopback.* to drivers/dibs/dibs_loopback.*. One global structure lo_dev is allocated and added to the dibs devices. Follow-on patches will move functionality. Same as smc_loopback, dibs_loopback is provided by a config option. Note that there is no way to dynamically add or remove the loopback device. That could be a future improvement. When moving code to drivers/dibs, replace ism_ prefix with dibs_ prefix. As this is mostly a move of existing code, copyright and authors are unchanged. Link: https://lore.kernel.org/lkml/20240428060738.60843-1-guwen@linux.alibaba.com/ [1] Signed-off-by: Alexandra Winter <wintera@linux.ibm.com> Link: https://patch.msgid.link/20250918110500.1731261-7-wintera@linux.ibm.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
24 lines
787 B
Plaintext
24 lines
787 B
Plaintext
# SPDX-License-Identifier: GPL-2.0
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config DIBS
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tristate "DIBS support"
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default n
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help
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Direct Internal Buffer Sharing (DIBS)
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A communication method that uses common physical (internal) memory
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for synchronous direct access into a remote buffer.
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Select this option to provide the abstraction layer between
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dibs devices and dibs clients like the SMC protocol.
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The module name is dibs.
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config DIBS_LO
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bool "intra-OS shortcut with dibs loopback"
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depends on DIBS
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default n
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help
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DIBS_LO enables the creation of an software-emulated dibs device
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named lo which can be used for transferring data when communication
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occurs within the same OS. This helps in convenient testing of
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dibs clients, since dibs loopback is independent of architecture or
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hardware.
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