- 11 Sep, 2018 21 commits
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Michael J. Ruhl authored
Packet queue state is over used to determine SDMA descriptor availablitity and packet queue request state. cpu 0 ret = user_sdma_send_pkts(req, pcount); cpu 0 if (atomic_read(&pq->n_reqs)) cpu 1 IRQ user_sdma_txreq_cb calls pq_update() (state to _INACTIVE) cpu 0 xchg(&pq->state, SDMA_PKT_Q_ACTIVE); At this point pq->n_reqs == 0 and pq->state is incorrectly SDMA_PKT_Q_ACTIVE. The close path will hang waiting for the state to return to _INACTIVE. This can also change the state from _DEFERRED to _ACTIVE. However, this is a mostly benign race. Remove the racy code path. Use n_reqs to determine if a packet queue is active or not. Reviewed-by:
Mitko Haralanov <mitko.haralanov@intel.com> Reviewed-by:
Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by:
Michael J. Ruhl <michael.j.ruhl@intel.com> Signed-off-by:
Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by:
Jason Gunthorpe <jgg@mellanox.com>
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Michael J. Ruhl authored
pq_update() can only be called in two places: from the completion function when the complete (npkts) sequence of packets has been submitted and processed, or from setup function if a subset of the packets were submitted (i.e. the error path). Currently both paths can call pq_update() if an error occurrs. This race will cause the n_req value to go negative, hanging file_close(), or cause a crash by freeing the txlist more than once. Several variables are used to determine SDMA send state. Most of these are unnecessary, and have code inspectible races between the setup function and the completion function, in both the send path and the error path. The request 'status' value can be set by the setup or by the completion function. This is code inspectibly racy. Since the status is not needed in the completion code or by the caller it has been removed. The request 'done' value races between usage by the setup and the completion function. The completion function does not need this. When the number of processed packets matches npkts, it is done. The 'has_error' value races between usage of the setup and the completion function. This can cause incorrect error handling and leave the n_req in an incorrect value (i.e. negative). Simplify the code by removing all of the unneeded state checks and variables. Clean up iovs node when it is freed. Eliminate race conditions in the error path: If all packets are submitted, the completion handler will set the completion status correctly (ok or aborted). If all packets are not submitted, the caller must wait until the submitted packets have completed, and then set the completion status. These two change eliminate the race condition in the error path. Reviewed-by:
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Dan Carpenter authored
The error code isn't set on this path. Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
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Michael J. Ruhl authored
The post_send() path determines if it should post directly or, schedule the post for later. The current logic is: if the swqe ring is empty or (for hfi1) wqe->length <= piothreshold post the send else schedule This can allow large requests to call the send engine directly. Large requests can potentially produce a large number of packets prior to returning to the caller, blocking the caller from posting more requests, and allowing better parallel processing. Allow the driver(s) more say in this logic (pass call_send to the driver, rather than examining a return value). Update hfi1/qib logic to schedule the send engine if an RC or UC message is larger than the QP MTU size. Reviewed-by:Ira Weiny <ira.weiny@intel.com> Signed-off-by:
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zhong jiang authored
debugfs_remove has taken the IS_ERR_OR_NULL into account. Just remove the unnecessary condition. Signed-off-by:
zhong jiang <zhongjiang@huawei.com> Signed-off-by:
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Mark Bloch authored
Currently a matcher can only be created and attached to a NIC RX flow table. Extend it to allow it on NIC TX flow tables as well. In order to achieve that, we: 1) Expose a new attribute: MLX5_IB_ATTR_FLOW_MATCHER_FLOW_FLAGS. enum ib_flow_flags is used as valid flags. Only IB_FLOW_ATTR_FLAGS_EGRESS is supported. 2) Remove the requirement to have a DEVX or QP destination when creating a flow. A flow added to NIC TX flow table will forward the packet outside of the vport (Wire or E-Switch in the SR-iOV case). Signed-off-by:
Mark Bloch <markb@mellanox.com> Reviewed-by:
Yishai Hadas <yishaih@mellanox.com> Signed-off-by:
Leon Romanovsky <leonro@mellanox.com> Signed-off-by:
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Mark Bloch authored
Add the ability to get a NIC TX flow table when using _get_flow_table(). This will allow to create a matcher and a flow rule on the NIC TX path. Signed-off-by:
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Mark Bloch authored
Support attaching flow actions to a flow rule via raw create flow. For now only NIC RX path is supported. This change requires to export flow resources management functions so we can maintain proper bookkeeping of flow actions. Signed-off-by:
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Mark Bloch authored
Move struct mlx5_flow_act to be passed from the method entry point, this will allow to add support for flow action for the raw create flow path. Signed-off-by:
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Mark Bloch authored
We support only a single action type per flow rule, in case the user passes the same type of flow actions fail the flow creation. Signed-off-by:
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Mark Bloch authored
Make the parsing of flow actions more generic so it could be used by mlx5 raw create flow. Signed-off-by:
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Mark Bloch authored
Use ib_set_flow() when initializing flow related resources. Signed-off-by:
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Guy Levi authored
Methods sometimes need to get a flexible set of IDRs and not a strict set as can be achieved today by the conventional IDR attribute. Add a new IDRS_ARRAY attribute to the generic uverbs ioctl layer. IDRS_ARRAY points to array of idrs of the same object type and same access rights, only write and read are supported. Signed-off-by:
Guy Levi <guyle@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>`` Signed-off-by:
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Mark Bloch authored
Any matching rules will be mutated based on the packet reformat context which is attached to that given flow rule. Signed-off-by:
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Mark Bloch authored
A L3_TUNNEL_TO_L2 decap flow action requires to enable the encap bit on the flow table, enable it if supported. This will allow to attach those flow actions to NIC RX steering. We don't enable if running on a representor. Signed-off-by:
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Mark Bloch authored
Any matching packet will be stripped of it's VXLAN tunnel, only the inner L2 onward is left. The user will receive the decapsulated packet. Signed-off-by:
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Mark Bloch authored
If NIC RX flow tables support decap operation, enable it on creation, This allows to perform decapsulation of tunnelled packets by steering rules. If NIC TX flow tables support reformat operation, enable it on creation. We don't enable those capabilities on representors as the E-Switch should handle packet modification (can be configured via TC) and as current hardware can't handle both FDB and NIC flow tables with decap/packet reformat support. Signed-off-by:
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Mark Bloch authored
When creating a flow steering rule, allow the user to attach a modify header action. Signed-off-by:
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Mark Bloch authored
Just like ingress steering, allow a user to create steering rules that match egress vport traffic. We expose the same number of priorities as the bypass (NIC RX) steering. Signed-off-by:
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Chuck Lever authored
Add helpful warning for RDMA consumer implementers. Signed-off-by:
Chuck Lever <chuck.lever@oracle.com> Signed-off-by:
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Chuck Lever authored
Code audit suggests that the RDMA CM event handler callback function is _always_ invoked in a context that is safe to block. That's important for consumer implementers to know, so document that in the comment before rdma_create_id (where the handler function is set up by the consumer). Signed-off-by:
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- 06 Sep, 2018 13 commits
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Parav Pandit authored
Even though device->ifindex is assigned before adding the device in the list which is read by netlink flow, it is better to assign rdma device index before publishing the device in the system to users and clients. Signed-off-by:
Parav Pandit <parav@mellanox.com> Reviewed-by:
Daniel Jurgens <danielj@mellanox.com> Signed-off-by:
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Parav Pandit authored
During register_device() init sequence is, (a) register with rdma cgroup followed by (b) register with sysfs Therefore, unregister_device() sequence should follow the reverse order. Signed-off-by:
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Leon Romanovsky authored
Lockdep engine handles correctly downgrade of locks and it simply incorrect to disable lockdep checks prior to calling mmu_notifier. Remove lockdep_off and ensure locks correctness. Signed-off-by:
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Parav Pandit authored
Even though device registration/unregistration and client registration/unregistration is not a performance path, define the client_data_lock as rwlock for code clarity. Signed-off-by:
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Parav Pandit authored
add_client_context(), ib_unregister_device() and ib_unregister_client() are designed to call from blocking context. There is no need to save and restore last interrupt state when called from such blocking context. Even though this is not a performance path, using the right spin lock API is desired for code clarity. To avoid checkpatch warning while removing flags, sizeof() is used. Signed-off-by:
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Parav Pandit authored
While unregistering a device, remove the context elements from the list to not have any stale entries. With that any errors/bugs can be checked when device is freed. Signed-off-by:
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Parav Pandit authored
While traversing client_data_list in following conditions, linked list is only read, no elements of the list are removed. Therefore, use list_for_each_entry(), instead of list_for_each_safe(). Signed-off-by:
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Parav Pandit authored
While unregistering a client, only context removal should be protected with lock. There is no need to protect a freeing of such context which is already removed from the list. Signed-off-by:
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Parav Pandit authored
Currently rdma_addr_cancel() is an async operation, which notifies that cancel is done by executing the callback function given during rdma_resolve_ip(). If resolve_ip request is already completed than callback is not executed. Instead, now rdma_resolve_addr() and rdma_addr_cancel() simplified in following ways. 1. rdma_addr_cancel() now a synchronous method. If request was pending, after it is cancelled, no callback is notified. 2. rdma_resolve_addr() and respective addr_handler() callback doesn't need to hold reference to cm_id. Signed-off-by:
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Parav Pandit authored
While registering a mad agent, a user space can trigger various errors and flood the logs. Therefore, decrease verbosity and rate limit such error messages. While we are at it, use __func__ to print function name. Signed-off-by:
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Muhammad Sammar authored
It is illegal to change MTU to a value lower than the minimum MTU stated in ethernet spec. In addition to that we need to add 4 bytes for encapsulation header (IPOIB_ENCAP_LEN). Before "ifconfig ib0 mtu 0" command, succeeds while it obviously shouldn't. Signed-off-by:
Muhammad Sammar <muhammads@mellanox.com> Reviewed-by:
Feras Daoud <ferasda@mellanox.com> Signed-off-by:
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Parav Pandit authored
mdev->state device state is not protected by the QP for which WRs are being processed. Therefore, there is no need to hold spin lock while checking mdev state. Given that device fatal error is unlikely situation, wrap the condition check with unlikely(). Additionally, kernel QP1 is also a kernel ULP for which soft CQEs needs to be generated. Therefore, check for device fatal error before processing QP1 work requests. Fixes: 89ea94a7 ("IB/mlx5: Reset flow support for IB kernel ULPs") Signed-off-by:
Maor Gottlieb <maorg@mellanox.com> Signed-off-by:
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Parav Pandit authored
When requested QP type is not supported for a {device, port}, return the error right away before validating all parameters during mad agent registration time. Signed-off-by:
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- 05 Sep, 2018 6 commits
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Jason Gunthorpe authored
For dependencies, branch based on rdma.git 'for-rc' of https://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git/ Pull 'uverbs_dev_cleanups' from Leon Romanovsky: ==================== Reuse the char device code interfaces to simplify ib_uverbs_device creation and destruction. As part of this series, we are sending fix to cleanup path, which was discovered during internal review, The fix definitely can go to -rc, but it means that this series will be dependent on rdma-rc. ==================== * branch 'uverbs_dev_cleanups': RDMA/uverbs: Use device.groups to initialize device attributes RDMA/uverbs: Use cdev_device_add() instead of cdev_add() RDMA/core: Depend on device_add() to add device attributes RDMA/uverbs: Fix error cleanup path of ib_uverbs_add_one() Resolved conflict in ib_device_unregister_sysfs() Signed-off-by:
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Parav Pandit authored
Instead of explicitly adding device attribute files and handling such error conditions, depend on device core layer to create device attributes files based group pointer NULL terminated array. Signed-off-by:
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Parav Pandit authored
Instead of doing two step process to add char device and create underlying device, use cdev_device_add() which does both. Currently a kobject per uverbs_device is created to keep reference to its holding ib_uverbs_device in addition to its underlying device 'dev'. Instead just use uverbs_device->dev to keep a reference to. With this change there is single reference tracker for ib_uverbs_device structure. This allows for subsequent patch to registers group attribute as well using single API cdev_device_add(). Signed-off-by:
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Parav Pandit authored
Instead of adding/removing device attribute files, depend on device_add() which considers adding these device files based on NULL terminated attributes group array. Signed-off-by:
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Parav Pandit authored
If ib_uverbs_create_uapi() fails, dev_num should be freed from the bitmap. Fixes: 7d96c9b1 ("IB/uverbs: Have the core code create the uverbs_root_spec") Signed-off-by:
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Somnath Kotur authored
1. DMA-able memory allocated for Shadow QP was not being freed. 2. bnxt_qplib_alloc_qp_hdr_buf() had a bug wherein the SQ pointer was erroneously pointing to the RQ. But since the corresponding free_qp_hdr_buf() was correct, memory being free was less than what was allocated. Fixes: 1ac5a404 ("RDMA/bnxt_re: Add bnxt_re RoCE driver") Signed-off-by:
Somnath Kotur <somnath.kotur@broadcom.com> Signed-off-by:
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