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- 10 Oct, 2019 4 commits
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Ursula Braun authored
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 <ubraun@linux.ibm.com> Signed-off-by:
Karsten Graul <kgraul@linux.ibm.com> Signed-off-by:
Jakub Kicinski <jakub.kicinski@netronome.com>
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Ursula Braun authored
SMCD link groups belong to certain ISM-devices and SMCR link group links belong to certain IB-devices. Increase the refcount for these devices, as long as corresponding link groups exist. Signed-off-by:
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Ursula Braun authored
This patch introduces separate locks for the split SMCD and SMCR link group lists. Signed-off-by:
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Ursula Braun authored
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:
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- 26 Jun, 2019 1 commit
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Huaping Zhou authored
After smc_lgr_create(), the newly created link group is added to smc_lgr_list, thus is accessible from other context. Although link group creation is serialized by smc_create_lgr_pending, the new link group may still be accessed concurrently. For example, if ib_device is no longer active, smc_ib_port_event_work() will call smc_port_terminate(), which in turn will call __smc_lgr_terminate() on every link group of this device. So conns_lock is required here. Signed-off-by:
Huaping Zhou <zhp@smail.nju.edu.cn> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 12 Apr, 2019 3 commits
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Karsten Graul authored
Rework smc_conn_create() to always return a valid DECLINE reason code. This removes the need to translate the return codes on 4 different places and allows to easily add more detailed return codes by changing smc_conn_create() only. Signed-off-by:
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Karsten Graul authored
The vlan_id of the underlying CLC socket was retrieved two times during processing of the listen handshaking. Change this to get the vlan id one time in connect and in listen processing, and reuse the id. And add a new CLC DECLINE return code for the case when the retrieval of the vlan id failed. Signed-off-by:
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Karsten Graul authored
During initialization of an SMC socket a lot of function parameters need to get passed down the function call path. Consolidate the parameters in a helper struct so there are less enough parameters to get all passed by register. Signed-off-by:
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- 12 Feb, 2019 1 commit
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Karsten Graul authored
Remove the shortcut that smc_lgr_free() would skip the check for existing connections when the link group is not in the link group list. Signed-off-by:
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- 08 Feb, 2019 1 commit
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Karsten Graul authored
The lgr field of an smc_connection is set in smc_conn_create() and should be cleared in smc_conn_free() for consistency reasons, so move the responsible code. Signed-off-by:
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- 04 Feb, 2019 1 commit
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Ursula Braun authored
Once RMBs are flagged as unused they are candidates for reuse. Thus the LLC DELETE RKEY operaton should be made before flagging the RMB as unused. Fixes: c7674c00 ("net/smc: unregister rkeys of unused buffer") Signed-off-by:
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- 01 Feb, 2019 1 commit
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Karsten Graul authored
To prevent races between smc_lgr_terminate() and smc_conn_free() add an extra check of the lgr field before accessing it, and cancel a delayed free_work when a new smc connection is created. This fixes the problem that free_work cleared the lgr variable but smc_lgr_terminate() or smc_conn_free() still access it in parallel. Signed-off-by:
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- 24 Nov, 2018 3 commits
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Karsten Graul authored
When an rmb is no longer in use by a connection, unregister its rkey at the remote peer with an LLC DELETE RKEY message. With this change, unused buffers held in the buffer pool are no longer registered at the remote peer. They are registered before the buffer is actually used and unregistered when they are no longer used by a connection. Signed-off-by:
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Ursula Braun authored
If a link is terminated that has never reached the active state, there is no need to trigger an LLC DELETE LINK. Signed-off-by:
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Ursula Braun authored
smc_lgr_free() is just called inside smc_core.c. Make it static. Just cleanup, no functional change. Signed-off-by:
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- 22 Nov, 2018 2 commits
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Hans Wippel authored
When a SMC-D link group is freed, a shutdown signal should be sent to the peer to indicate that the link group is invalid. This patch adds the shutdown signal to the SMC code. Signed-off-by:
Hans Wippel <hwippel@linux.ibm.com> Signed-off-by:
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Karsten Graul authored
When searching for an existing link group the queue pair number is also to be taken into consideration. When the SMC server sends a new number in a CLC packet (keeping all other values equal) then a new link group is to be created on the SMC client side. Signed-off-by:
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- 26 Oct, 2018 1 commit
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Karsten Graul authored
The pointer to the link group is unset in the smc connection structure right before the call to smc_buf_unuse. Provide the lgr pointer to smc_buf_unuse explicitly. And move the call to smc_lgr_schedule_free_work to the end of smc_conn_free. Fixes: a6920d1d ("net/smc: handle unregistered buffers") Signed-off-by:
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- 16 Aug, 2018 1 commit
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Jason Gunthorpe authored
This reverts commit ddb457c6. The include rdma/ib_cache.h is kept, and we have to add a memset to the compat wrapper to avoid compiler warnings in gcc-7 This revert is done to avoid extensive merge conflicts with SMC changes in netdev during the 4.19 merge window. Signed-off-by:
Jason Gunthorpe <jgg@mellanox.com>
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- 26 Jul, 2018 2 commits
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Karsten Graul authored
Send an orderly DELETE LINK request before termination of a link group, add support for client triggered DELETE LINK processing. And send a disorderly DELETE LINK before module is unloaded. Signed-off-by:
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Ursula Braun authored
SMC code uses the base gid for VLAN traffic. The gids exchanged in the CLC handshake and the gid index used for the QP have to switch from the base gid to the appropriate vlan gid. When searching for a matching IB device port for a certain vlan device, it does not make sense to return an IB device port, which is not enabled for the used vlan_id. Add another check whether a vlan gid exists for a certain IB device port. Signed-off-by:
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- 30 Jun, 2018 3 commits
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Hans Wippel authored
This patch ties together the previous SMC-D patches. It adds support for SMC-D to the listen and connect functions and, thus, enables SMC-D support in the SMC code. If a connection supports both SMC-R and SMC-D, SMC-D is preferred. Signed-off-by:
Thomas Richter <tmricht@linux.ibm.com> Signed-off-by:
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Hans Wippel authored
The data transfer and CDC message headers differ in SMC-R and SMC-D. This patch adds support for the SMC-D data transfer to the existing SMC code. It consists of the following: * SMC-D CDC support * SMC-D tx support * SMC-D rx support The CDC header is stored at the beginning of the receive buffer. Thus, a rx_offset variable is added for the CDC header offset within the buffer (0 for SMC-R). Signed-off-by:
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Hans Wippel authored
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:
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- 18 Jun, 2018 1 commit
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Parav Pandit authored
Push the copy of the gid_attr into the SMC code. This probably doesn't push it far enough, as it looks like the conn->lgr should potentially hold the reference for its lifetime. Signed-off-by:
Parav Pandit <parav@mellanox.com> Signed-off-by:
Leon Romanovsky <leonro@mellanox.com> Signed-off-by:
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- 23 May, 2018 3 commits
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Ursula Braun authored
Client link group creation always follows the server linkgroup creation. If peer creates a new server link group, client has to create a new client link group. If peer reuses a server link group for a new connection, client has to reuse its client link group as well. To avoid out-of-sync conditions for link groups a longer delay for for client link group removal is defined to make sure this link group still exists, once the peer decides to reuse a server link group. Currently the client link group delay time is just 10 jiffies larger than the server link group delay time. This patch increases the delay difference to 10 seconds to have a better protection against out-of-sync link groups. Signed-off-by:
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Stefan Raspl authored
Add support for out of band data send and receive. Signed-off-by:
Stefan Raspl <raspl@linux.ibm.com> Signed-off-by:
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Hans Wippel authored
Currently, smc_port_terminate() is not holding the lock of the lgr list while it is traversing the list. This patch adds locking to this function and changes smc_lgr_terminate() accordingly. Signed-off-by:
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- 18 May, 2018 5 commits
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Hans Wippel authored
This patch changes the function smc_buf_free to use the SMC link group instead of the link as function parameter. Also, it changes the order of the other two parameters. Signed-off-by:
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Hans Wippel authored
This patch consists of Christmas tree fixes and removal of an unneeded function parameter. Signed-off-by:
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Hans Wippel authored
SMC connection and buffer handling belong to smc_core. So, this patch moves this code from smc.h to smc_core. Signed-off-by:
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Hans Wippel authored
This patch moves the global link group list to smc_core where the link group functions are. To make this work, it moves code in af_smc and smc_ib that operates on the link group list to smc_core as well. While at it, the link group counter is integrated into the list structure and initialized to zero. Signed-off-by:
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Hans Wippel authored
In addition to the buffer references, SMC currently stores the sizes of the receive and send buffers in each connection as separate variables. This patch introduces a buffer length variable in the common buffer descriptor and uses this length instead. Signed-off-by:
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- 16 May, 2018 5 commits
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Karsten Graul authored
Avoid to run the processing in smc_lgr_terminate() more than once, remember when the link group termination is triggered. Signed-off-by:
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Karsten Graul authored
Before smc_lgr_free() is called the link must be set inactive by calling smc_llc_link_inactive(). Signed-off-by:
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Karsten Graul authored
SMC handles deferred work in tasklets. As tasklets cannot sleep this can result in rare EBUSY conditions, so defer this work in a work queue. The high level api functions do not defer work because they can sleep until the llc send is actually completed. Signed-off-by:
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Karsten Graul authored
Move the llc layer specific initialization and cleanup out of smc_core.c into smc_llc.c (smc_llc_link_init and smc_llc_link_clear). Move all initialization of a link into the new init function. Signed-off-by:
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Karsten Graul authored
Register new rmb buffers with the remote peer by exchanging a confirm_rkey llc message. Signed-off-by:
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- 04 May, 2018 1 commit
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Stefan Raspl authored
Preparatory work for splice() support. Signed-off-by:
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- 03 May, 2018 1 commit
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Karsten Graul authored
When smc_wr_reg_send() fails then tag (regerr) the affected buffer and free it in smc_buf_unuse(). Signed-off-by:
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