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| author | Alexandra Winter <wintera@linux.ibm.com> | 2025-09-18 13:04:49 +0200 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2025-09-23 11:13:21 +0200 |
| commit | 35758b0032c056cdff3e8f5a70669cb3e2c8d0e4 (patch) | |
| tree | fc95b3c06f3ccafbee1ac38e74b13850ffc88508 /drivers | |
| parent | net/smc: Decouple sf and attached send_buf in smc_loopback (diff) | |
| download | linux-35758b0032c056cdff3e8f5a70669cb3e2c8d0e4.tar.gz linux-35758b0032c056cdff3e8f5a70669cb3e2c8d0e4.zip | |
dibs: Create drivers/dibs
Create the file structure for a 'DIBS - Direct Internal Buffer Sharing'
shim layer that will provide generic functionality and declarations for
dibs device drivers and dibs clients.
Following patches will add functionality.
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Link: https://patch.msgid.link/20250918110500.1731261-4-wintera@linux.ibm.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/Makefile | 1 | ||||
| -rw-r--r-- | drivers/dibs/Kconfig | 12 | ||||
| -rw-r--r-- | drivers/dibs/Makefile | 7 | ||||
| -rw-r--r-- | drivers/dibs/dibs_main.c | 37 |
4 files changed, 57 insertions, 0 deletions
diff --git a/drivers/Makefile b/drivers/Makefile index b5749cf67044..a104163b1353 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -195,4 +195,5 @@ obj-$(CONFIG_DRM_ACCEL) += accel/ obj-$(CONFIG_CDX_BUS) += cdx/ obj-$(CONFIG_DPLL) += dpll/ +obj-$(CONFIG_DIBS) += dibs/ obj-$(CONFIG_S390) += s390/ diff --git a/drivers/dibs/Kconfig b/drivers/dibs/Kconfig new file mode 100644 index 000000000000..09c12f6838ad --- /dev/null +++ b/drivers/dibs/Kconfig @@ -0,0 +1,12 @@ +# SPDX-License-Identifier: GPL-2.0 +config DIBS + tristate "DIBS support" + default n + help + Direct Internal Buffer Sharing (DIBS) + A communication method that uses common physical (internal) memory + for synchronous direct access into a remote buffer. + + Select this option to provide the abstraction layer between + dibs devices and dibs clients like the SMC protocol. + The module name is dibs. diff --git a/drivers/dibs/Makefile b/drivers/dibs/Makefile new file mode 100644 index 000000000000..825dec431bfc --- /dev/null +++ b/drivers/dibs/Makefile @@ -0,0 +1,7 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# DIBS class module +# + +dibs-y += dibs_main.o +obj-$(CONFIG_DIBS) += dibs.o diff --git a/drivers/dibs/dibs_main.c b/drivers/dibs/dibs_main.c new file mode 100644 index 000000000000..68e189932fcf --- /dev/null +++ b/drivers/dibs/dibs_main.c @@ -0,0 +1,37 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * DIBS - Direct Internal Buffer Sharing + * + * Implementation of the DIBS class module + * + * Copyright IBM Corp. 2025 + */ +#define KMSG_COMPONENT "dibs" +#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/err.h> +#include <linux/dibs.h> + +MODULE_DESCRIPTION("Direct Internal Buffer Sharing class"); +MODULE_LICENSE("GPL"); + +/* use an array rather a list for fast mapping: */ +static struct dibs_client *clients[MAX_DIBS_CLIENTS]; +static u8 max_client; + +static int __init dibs_init(void) +{ + memset(clients, 0, sizeof(clients)); + max_client = 0; + + return 0; +} + +static void __exit dibs_exit(void) +{ +} + +module_init(dibs_init); +module_exit(dibs_exit); |