Commit a612dbe8 authored Sep 18, 2025 by Julian Ruess Committed by Paolo Abeni Sep 23, 2025

dibs: Move event handling to dibs layer



Add defines for all event types and subtypes an ism device is known to
produce as it can be helpful for debugging purposes.

Introduces a generic 'struct dibs_event' and adopt ism device driver
and smc-d client accordingly. Tolerate and ignore other type and subtype
values to enable future device extensions.

SMC-D and ISM are now independent.
struct ism_dev can be moved to drivers/s390/net/ism.h.

Note that in smc, the term 'ism' is still used. Future patches could
replace that with 'dibs' or 'smc-d' as appropriate.

Signed-off-by: Julian Ruess <julianr@linux.ibm.com>
Co-developed-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Link: https://patch.msgid.link/20250918110500.1731261-15-wintera@linux.ibm.com


Signed-off-by: Paolo Abeni <pabeni@redhat.com>

parent cc21191b

MAINTAINERS

+0 −2

Original line number	Diff line number	Diff line
		@@ -17580,7 +17580,6 @@ F: include/linux/fddidevice.h
		F: include/linux/hippidevice.h
		F: include/linux/if_*
		F: include/linux/inetdevice.h
		F: include/linux/ism.h
		F: include/linux/netdev*
		F: include/linux/platform_data/wiznet.h
		F: include/uapi/linux/cn_proc.h
		@@ -22237,7 +22236,6 @@ L: linux-s390@vger.kernel.org
		L: netdev@vger.kernel.org
		S: Supported
		F: drivers/s390/net/
		F: include/linux/ism.h

		S390 PCI SUBSYSTEM
		M: Niklas Schnelle <schnelle@linux.ibm.com>

arch/s390/configs/debug_defconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -122,6 +122,7 @@ CONFIG_XFRM_USER=m
		CONFIG_NET_KEY=m
		CONFIG_DIBS=y
		CONFIG_DIBS_LO=y
		CONFIG_SMC=m
		CONFIG_SMC_DIAG=m
		CONFIG_INET=y
		CONFIG_IP_MULTICAST=y

arch/s390/configs/defconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -113,6 +113,7 @@ CONFIG_XFRM_USER=m
		CONFIG_NET_KEY=m
		CONFIG_DIBS=y
		CONFIG_DIBS_LO=y
		CONFIG_SMC=m
		CONFIG_SMC_DIAG=m
		CONFIG_INET=y
		CONFIG_IP_MULTICAST=y

drivers/dibs/dibs_main.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -98,7 +98,7 @@ int dibs_unregister_client(struct dibs_client *client)
		goto err_reg_dmb;
		}
		}
		/* Stop forwarding IRQs */
		/* Stop forwarding IRQs and events */
		dibs->subs[client->id] = NULL;
		spin_unlock_irqrestore(&dibs->lock, flags);
		clients[client->id]->ops->del_dev(dibs);

drivers/s390/net/Kconfig

+0 −1

Original line number	Diff line number	Diff line
		@@ -82,7 +82,6 @@ config CCWGROUP
		config ISM
		tristate "Support for ISM vPCI Adapter"
		depends on PCI && DIBS
		imply SMC
		default n
		help
		Select this option if you want to use the Internal Shared Memory