kernel/linux.git/include/net/smc.h, branch v5.10.22

net/smc: introduce CHID callback for ISM devices

2020-09-28T22:19:03+00:00

With SMCD version 2 the CHIDs of ISM devices are needed for the CLC handshake. This patch provides the new callback to retrieve the CHID of an ISM device. Signed-off-by: Ursula Braun Signed-off-by: Karsten Graul Signed-off-by: David S. Miller

net/smc: introduce System Enterprise ID (SEID)

2020-09-28T22:19:02+00:00

SMCD version 2 defines a System Enterprise ID (short SEID). This patch contains the SEID creation and adds the callback to retrieve the created SEID. Signed-off-by: Ursula Braun Signed-off-by: Karsten Graul Signed-off-by: David S. Miller

net/smc: introduce bookkeeping of SMCD link groups

2019-11-15T20:28:28+00:00

If the ism module is unloaded return control from exit routine only, if all link groups are freed. If an IB device is thrown away return control from device removal only, if all link groups belonging to this device are freed. A counters for the total number of SMCD link groups per ISM device is introduced. ism module unloading continues only if the total number of SMCD link groups for all ISM devices is zero. ISM device removal continues only it the total number of SMCD link groups per ISM device has decreased to zero. Signed-off-by: Ursula Braun Signed-off-by: Karsten Graul Signed-off-by: David S. Miller

net/smc: immediate termination for SMCD link groups

2019-11-15T20:28:28+00:00

SMCD link group termination is called when peer signals its shutdown of its corresponding link group. For regular shutdowns no connections exist anymore. For abnormal shutdowns connections must be killed and their DMBs must be unregistered immediately. That means the SMCR method to delay the link group freeing several seconds does not fit. This patch adds immediate termination of a link group and its SMCD connections and makes sure all SMCD link group related cleanup steps are finished. Signed-off-by: Ursula Braun Signed-off-by: Karsten Graul Signed-off-by: David S. Miller

net/smc: no new connections on disappearing devices

2019-10-10T02:45:44+00:00

Add a "going_away" indication to ISM devices and IB ports and avoid creation of new connections on such disappearing devices. And do not handle ISM events if ISM device is disappearing. Signed-off-by: Ursula Braun Signed-off-by: Karsten Graul Signed-off-by: Jakub Kicinski

net/smc: separate locks for SMCD and SMCR link group lists

2019-10-10T02:45:44+00:00

This patch introduces separate locks for the split SMCD and SMCR link group lists. Signed-off-by: Ursula Braun Signed-off-by: Karsten Graul Signed-off-by: Jakub Kicinski

net/smc: separate SMCD and SMCR link group lists

2019-10-10T02:45:44+00:00

Currently SMCD and SMCR link groups are maintained in one list. To facilitate abnormal termination handling they are split into a separate list for SMCR link groups and separate lists for SMCD link groups per SMCD device. Signed-off-by: Ursula Braun Signed-off-by: Karsten Graul Signed-off-by: Jakub Kicinski

net/smc: add smcd support to the pnet table

2019-02-21T18:34:37+00:00

Currently, users can only set pnetids for netdevs and ib devices in the pnet table. This patch adds support for smcd devices to the pnet table. Signed-off-by: Hans Wippel Signed-off-by: Ursula Braun Signed-off-by: David S. Miller

net/smc: add pnetid support for SMC-D and ISM

2018-06-30T11:42:25+00:00

SMC-D relies on PNETIDs to find usable SMC-D/ISM devices for a SMC connection. This patch adds SMC-D/ISM support to the current PNETID implementation. Signed-off-by: Hans Wippel Signed-off-by: Ursula Braun Suggested-by: Thomas Richter Signed-off-by: David S. Miller

net/smc: add base infrastructure for SMC-D and ISM

2018-06-30T11:42:25+00:00

SMC supports two variants: SMC-R and SMC-D. For data transport, SMC-R uses RDMA devices, SMC-D uses so-called Internal Shared Memory (ISM) devices. An ISM device only allows shared memory communication between SMC instances on the same machine. For example, this allows virtual machines on the same host to communicate via SMC without RDMA devices. This patch adds the base infrastructure for SMC-D and ISM devices to the existing SMC code. It contains the following: * ISM driver interface: This interface allows an ISM driver to register ISM devices in SMC. In the process, the driver provides a set of device ops for each device. SMC uses these ops to execute SMC specific operations on or transfer data over the device. * Core SMC-D link group, connection, and buffer support: Link groups, SMC connections and SMC buffers (in smc_core) are extended to support SMC-D. * SMC type checks: Some type checks are added to prevent using SMC-R specific code for SMC-D and vice versa. To actually use SMC-D, additional changes to pnetid, CLC, CDC, etc. are required. These are added in follow-up patches. Signed-off-by: Hans Wippel Signed-off-by: Ursula Braun Suggested-by: Thomas Richter Signed-off-by: David S. Miller