[PATCH net-next v2 0/7] net/smc: implement SMCv2.1 virtual ISM device support

Wen Gu
2023-11-24T14:42:20Z

The fourth edition of SMCv2 adds the SMC version 2.1 feature updates for
SMC-Dv2 with virtual ISM. Virtual ISM are created and supported mainly by
OS or hypervisor software, comparable to IBM ISM which is based on platform
firmware or hardware.

With the introduction of virtual ISM, SMCv2.1 makes some updates:

- Introduce feature bitmask to indicate supplemental features.
- Reserve a range of CHIDs for virtual ISM.
- Support extended GIDs (128 bits) in CLC handshake.

So this patch set aims to implement these updates in Linux kernel. And it
acts as the first part of SMC-D virtual ISM extension & loopback-ism [1].

[1] https://lore.kernel.org/netdev/1695568613-125057-1-git-send-email-guwen@linux.alibaba.com/

v2->v1:
- Fix sparse complaint;
- Rebase to the latest net-next;

Wen Gu (7):
net/smc: Rename some variable 'fce' to 'fce_v2x' for clarity
net/smc: support SMCv2.x supplemental features negotiation
net/smc: introduce virtual ISM device support feature
net/smc: define a reserved CHID range for virtual ISM devices
net/smc: compatible with 128-bits extend GID of virtual ISM device
net/smc: disable SEID on non-s390 archs where virtual ISM may be used
net/smc: manage system EID in SMC stack instead of ISM driver

drivers/s390/net/ism.h | 6 ---
drivers/s390/net/ism_drv.c | 54 +++++++--------------------
include/linux/ism.h | 1 -
include/net/smc.h | 16 +++++---
net/smc/af_smc.c | 68 ++++++++++++++++++++++++++-------
net/smc/smc.h | 7 ++++
net/smc/smc_clc.c | 93 ++++++++++++++++++++++++++++++++--------------
net/smc/smc_clc.h | 22 +++++++----
net/smc/smc_core.c | 32 ++++++++++------
net/smc/smc_core.h | 8 ++--
net/smc/smc_diag.c | 7 +++-
net/smc/smc_ism.c | 57 ++++++++++++++++++++--------
net/smc/smc_ism.h | 31 +++++++++++++++-
net/smc/smc_pnet.c | 4 +-
14 files changed, 270 insertions(+), 136 deletions(-)

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1.8.3.1