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2007-02-17RDMA/cma: Add multicast communication supportSean Hefty3-5/+33
Extend rdma_cm to support multicast communication. Multicast support is added to the existing RDMA_PS_UDP port space, as well as a new RDMA_PS_IPOIB port space. The latter port space allows joining the multicast groups used by IPoIB, which enables offloading IPoIB traffic to a separate QP. The port space determines the signature used in the MGID when joining the group. The newly added RDMA_PS_IPOIB also allows for unicast operations, similar to RDMA_PS_UDP. Supporting the RDMA_PS_IPOIB requires changing how UD QPs are initialized, since we can no longer assume that the qkey is constant. This requires saving the Q_Key to use when attaching to a device, so that it is available when creating the QP. The Q_Key information is exported to the user through the existing rdma_init_qp_attr() interface. Multicast support is also exported to userspace through the rdma_ucm. Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-02-17IB/sa: Track multicast join/leave requestsSean Hefty2-91/+74
The IB SA tracks multicast join/leave requests on a per port basis and does not do any reference counting: if two users of the same port join the same group, and one leaves that group, then the SA will remove the port from the group even though there is one user who wants to stay a member left. Therefore, in order to support multiple users of the same multicast group from the same port, we need to perform reference counting locally. To do this, add an multicast submodule to ib_sa to perform reference counting of multicast join/leave operations. Modify ib_ipoib (the only in-kernel user of multicast) to use the new interface. Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-02-05IB: Make sure struct ib_user_mad.data is alignedJason Gunthorpe1-1/+1
Make the untyped data region in ib_user_mad have type u64 so that it gets aligned properly. This avoids alignment faults in ib_umad when casting the data field to an rmpp_mad and accessing the 64-bit tid field on architectures like ia64. Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-02-05IB: Return qp pointer as part of ib_wcMichael S. Tsirkin1-1/+1
struct ib_wc currently only includes the local QP number: this matches the IB spec, but seems mostly useless. The following patch replaces this with the pointer to qp itself, and updates all low level drivers and all users. This has the following advantages: - Ability to get a per-qp context through wc->qp->qp_context - Existing drivers already have the qp pointer ready in poll cq, so this change actually saves a tiny bit (extra memory read) on data path (for ehca it would actually be expensive to find the QP pointer when polling a CQ, but ehca does not support SRQ so we can leave wc->qp as NULL for ehca) - Users that need the QP number can still get it through wc->qp->qp_num Use case: In IPoIB connected mode code, I have a common CQ shared by multiple QPs. To track connection usage, I need a way to get at some per-QP context upon the completion, and I would like to avoid allocating context object per work request just to stick a QP pointer into it. With this code, I can just use wc->qp->qp_context. Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-02-05IB: Include <linux/kref.h> explicitly in <rdma/ib_verbs.h>Michael S. Tsirkin1-0/+1
<rdma/ib_verbs.h> uses struct kref, so it should include <linux/kref.h> explicitly to avoid hidden include dependencies. Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-12-16IB: Fix ib_dma_alloc_coherent() wrapperRoland Dreier1-1/+8
The ib_dma_alloc_coherent() wrapper uses a u64* for the dma_handle parameter, unlike dma_alloc_coherent, which uses dma_addr_t*. This means that we need a temporary variable to handle the case when ib_dma_alloc_coherent() just falls through directly to dma_alloc_coherent() on architectures where sizeof u64 != sizeof dma_addr_t. Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-12-14[PATCH] ib_verbs: Use explicit if-else statements to avoid errors with ↵Ben Collins1-31/+39
do-while macros At least on PPC, the "op ? op : dma" construct causes a compile failure because the dma_* is a do{}while(0) macro. This turns all of them into proper if/else to avoid this problem. Signed-off-by: Ben Collins <bcollins@ubuntu.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-13IB: Add DMA mapping functions to allow device drivers to interposeRalph Campbell1-0/+253
The QLogic InfiniPath HCAs use programmed I/O instead of HW DMA. This patch allows a verbs device driver to interpose on DMA mapping function calls in order to avoid relying on bus_to_virt() and phys_to_virt() to undo the mappings created by dma_map_single(), dma_map_sg(), etc. Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-12-12RDMA/cma: Export rdma cm interface to userspaceSean Hefty2-1/+210
Export the rdma cm interfaces to userspace via a misc device. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-12-12RDMA/cma: Add support for RDMA_PS_UDPSean Hefty2-0/+18
Allow the use of UD QPs through the rdma_cm, in order to provide address translation services for resolving IB addresses for datagram messages using SIDR. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-12-12RDMA/cma: Allow early transition to RTS to handle lost CM messagesSean Hefty1-0/+15
During connection establishment, the passive side of a connection can receive messages from the active side before the connection event has been delivered to the user. Allow the passive side to send messages in response to received data before the event is delivered. To handle the case where the connection messages are lost, a new rdma_notify() function is added that users may invoke to force a connection into the established state. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-12-12RDMA/cma: Report connect info with connect eventsSean Hefty1-15/+16
Connection information was never given to the recipient of a connection request or reply message. Only the event was delivered. Report the connection data with the event to allows user to reject the connection based on the requested parameters, or adjust their resources to match the request. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-12-12RDMA/cma: Remove unneeded qp_type parameter from rdma_cmSean Hefty1-1/+0
The qp_type parameter into the rdma_cm is unneeded, and can be misleading. The QP type should be determined from the port space. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-11-30IB/cm: Fix automatic path migration supportSean Hefty2-7/+16
The ib_cm_establish() function is replaced with a more generic ib_cm_notify(). This routine is used to notify the CM that failover has occurred, so that future CM messages (LAP, DREQ) reach the remote CM. (Currently, we continue to use the original path) This bumps the userspace CM ABI. New alternate path information is captured when a LAP message is sent or received. This allows QP attributes to be initialized for the user when a new path is loaded after failover occurs. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-11-03RDMA/addr: Use client registration to fix module unload raceSean Hefty1-1/+19
Require registration with ib_addr module to prevent caller from unloading while a callback is in progress. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-10-31IB/uverbs: Return sq_draining value in query_qp responseJack Morgenstein1-1/+1
Return the sq_draining value back to user space for query_qp instead of the en_sqd_async notify value, which is valid only for modify_qp. For query_qp, the draining status should returned. Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-09-23IB/sa: fix ib_sa_selector namesMichael S. Tsirkin1-2/+2
Relevant SA queries are actually "greater than" / "less than", not "greater than or equal" / "less than or equal" as the names imply. (See IB spec 1.2 Vol 1, 15.2.5.16 PATHRECORD/Table 205 PathRecord) Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-09-23RDMA/cma: Document rdma_accept() error handlingOr Gerlitz1-0/+4
Document the reject sending and modifying QP to error done in rdma_accept(). Signed-off-by: Or Gerlitz <ogerlitz@voltaire.com> Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-09-23RDMA/cma: Document rdma_destroy_id() functionOr Gerlitz1-0/+8
Clarify that rdma_destroy_id cancels outstanding asynchronous operations on the Associated id. Signed-off-by: Or Gerlitz <ogerlitz@voltaire.com> Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-09-23IB/sa: Require SA registrationMichael S. Tsirkin1-7/+34
Require users to register with SA module, to prevent the sa_query module text from going away while an SA query callback is still running. Update all in-tree users for the new interface. Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il> Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-09-23RDMA: iWARP Core Changes.Tom Tucker2-5/+37
Modifications to the existing rdma header files, core files, drivers, and ulp files to support iWARP, including: - Hook iWARP CM into the build system and use it in rdma_cm. - Convert enum ib_node_type to enum rdma_node_type, which includes the possibility of RDMA_NODE_RNIC, and update everything for this. Signed-off-by: Tom Tucker <tom@opengridcomputing.com> Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-09-23RDMA: iWARP Connection Manager.Tom Tucker1-0/+258
Add an iWARP Connection Manager (CM), which abstracts connection management for iWARP devices (RNICs). It is a logical instance of the xx_cm where xx is the transport type (ib or iw). The symbols exported are used by the transport independent rdma_cm module, and are available also for transport dependent ULPs. Signed-off-by: Tom Tucker <tom@opengridcomputing.com> Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-09-23IB/uverbs: Pass userspace data to modify_srq and modify_qp methodsRalph Campbell1-2/+4
Pass a struct ib_udata to the low-level driver's ->modify_srq() and ->modify_qp() methods, so that it can get to the device-specific data passed in by the userspace driver. Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-09-23IB/uverbs: Allow resize CQ operation to return driver-specific dataRalph Campbell1-0/+2
Add a ib_uverbs_resize_cq_resp.driver_data field so that low-level drivers can return data from a resize CQ operation to userspace. Have ib_uverbs_resize_cq() only copy the cqe field, to avoid having to bump the userspace ABI. Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-09-19[HEADERS] One line per header in Kbuild files to reduce conflictsDavid Woodhouse1-1/+1
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-07-24IB/mad: Validate MADs for spec complianceSean Hefty1-0/+7
Validate MADs sent by userspace clients for spec compliance with C13-18.1.1 (prevent duplicate requests and responses sent on the same port). Without this, RMPP transactions get aborted because of duplicate packets. This patch is similar to that provided by Jack Morgenstein. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il> Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-07-15[PATCH] fmr pool: remove unnecessary pointer dereferenceMichael S. Tsirkin1-1/+1
ib_fmr_pool_map_phys gets the virtual address by pointer but never writes there, and users (e.g. srp) seem to assume this and ignore the value returned. This patch cleans up the API to get the VA by value, and updates all users. Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il> Acked-by: Roland Dreier <rolandd@cisco.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-15[PATCH] IB/addr: gid structure alignment fixMichael S. Tsirkin1-4/+6
The device address contains unsigned character arrays, which contain raw GID addresses. The GIDs may not be naturally aligned, so do not cast them to structures or unions. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il> Cc: Roland Dreier <rolandd@cisco.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-04Merge git://git.infradead.org/hdrinstall-2.6Linus Torvalds1-0/+1
* git://git.infradead.org/hdrinstall-2.6: Remove export of include/linux/isdn/tpam.h Remove <linux/i2c-id.h> and <linux/i2c-algo-ite.h> from userspace export Restrict headers exported to userspace for SPARC and SPARC64 Add empty Kbuild files for 'make headers_install' in remaining arches. Add Kbuild file for Alpha 'make headers_install' Add Kbuild file for SPARC 'make headers_install' Add Kbuild file for IA64 'make headers_install' Add Kbuild file for S390 'make headers_install' Add Kbuild file for i386 'make headers_install' Add Kbuild file for x86_64 'make headers_install' Add Kbuild file for PowerPC 'make headers_install' Add generic Kbuild files for 'make headers_install' Basic implementation of 'make headers_check' Basic implementation of 'make headers_install'
2006-06-18Add generic Kbuild files for 'make headers_install'David Woodhouse1-0/+1
This adds the Kbuild files listing the files which are to be installed by the 'headers_install' make target, in generic directories. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-06-18IB/uverbs: Don't serialize with ib_uverbs_idr_mutexRoland Dreier1-0/+4
Currently, all userspace verbs operations that call into the kernel are serialized by ib_uverbs_idr_mutex. This can be a scalability issue for some workloads, especially for devices driven by the ipath driver, which needs to call into the kernel even for datapath operations. Fix this by adding reference counts to the userspace objects, and then converting ib_uverbs_idr_mutex into a spinlock that only protects the idrs long enough to take a reference on the object being looked up. Because remove operations may fail, we have to do a slightly funky two-step deletion, which is described in the comments at the top of uverbs_cmd.c. This also still leaves ib_uverbs_idr_lock as a single lock that is possibly subject to contention. However, the lock hold time will only be a single idr operation, so multiple threads should still be able to make progress, even if ib_uverbs_idr_lock is being ping-ponged. Surprisingly, these changes even shrink the object code: add/remove: 23/5 grow/shrink: 4/21 up/down: 633/-693 (-60) Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-18IB/sa: Add ib_init_ah_from_path()Sean Hefty1-0/+7
Add a call to initialize address handle attributes given a path record. This is used by the CM, and would be useful for users of UD QPs. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-18IB: Add ib_init_ah_from_wc()Sean Hefty1-0/+14
Add a function to initialize address handle attributes from a work completion. This functionality is duplicated by both verbs and the CM. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-18IB/ucm: Get rid of duplicate P_Key parameterSean Hefty2-3/+2
The P_Key is provided into a SIDR REQ in two places, once as a parameter, and again in the path record. Remove the P_Key as a parameter and always use the one given in the path record. This change has no practical effect on ABI functionality. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-18IB: Move struct port_info from ipath to <rdma/ib_smi.h>Leonid Arsh1-0/+36
Move ipath's struct port_info into <rdma/ib_smi.h>, so that it can be used by mthca to implement client reregister support. Remove the __attribute__((packed)) because all the members of the struct are naturally aligned anyway. Signed-off-by: Leonid Arsh <leonida@voltaire.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-18IB: Add client reregister event typeLeonid Arsh1-1/+2
Add IB_EVENT_CLIENT_REREGISTER to enum so low-level drivers can generate "client reregister" events. Signed-off-by: Leonid Arsh <leonida@voltaire.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-18IB: Add caching of ports' LMCJack Morgenstein2-0/+14
Add an LMC cache to struct ib_device, and add a function ib_get_cached_lmc() to query the cache. Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il> Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-18IB: IP address based RDMA connection managerSean Hefty2-0/+303
Kernel connection management agent over InfiniBand that connects based on IP addresses. The agent defines a generic RDMA connection abstraction to support clients wanting to connect over different RDMA devices. The agent also handles RDMA device hotplug events on behalf of clients. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-18IB: address translation to map IP toIB addresses (GIDs)Sean Hefty1-0/+114
Add an address translation service that maps IP addresses to InfiniBand GID addresses using IPoIB. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-18IB/cm: Match connection requests based on private dataSean Hefty1-6/+17
Extend matching connection requests to listens in the InfiniBand CM to include private data checks. This allows applications to listen on the same service identifier, with private data directing the request to the appropriate application. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-18IB: common handling for marshalling parameters to/from userspaceSean Hefty4-100/+174
Provide common handling for marshalling data between userspace clients and kernel InfiniBand drivers. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-04-10IB: simplify static rate encodingJack Morgenstein2-28/+28
Push translation of static rate to HCA format into low-level drivers, where it belongs. For static rate encoding, use encoding of rate field from IB standard PathRecord, with addition of value 0, for backwards compatibility with current usage. The changes are: - Add enum ib_rate to midlayer includes. - Get rid of static rate translation in IPoIB; just use static rate directly from Path and MulticastGroup records. - Update mthca driver to translate absolute static rate into the format used by hardware. This also fixes mthca's static rate handling for HCAs that are capable of 4X DDR. Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-03-30IB/mad: RMPP support for additional classesHal Rosenstock1-1/+26
Add RMPP support for additional management classes that support it. Also, validate RMPP is consistent with management class specified. Signed-off-by: Hal Rosenstock <halr@voltaire.com> Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-03-20IB/umad: Add support for large RMPP transfersJack Morgenstein1-18/+30
Add support for sending and receiving large RMPP transfers. The old code supports transfers only as large as a single contiguous kernel memory allocation. This patch uses linked list of memory buffers when sending and receiving data to avoid needing contiguous pages for larger transfers. Receive side: copy the arriving MADs in chunks instead of coalescing to one large buffer in kernel space. Send side: split a multipacket MAD buffer to a list of segments, (multipacket_list) and send these using a gather list of size 2. Also, save pointer to last sent segment, and retrieve requested segments by walking list starting at last sent segment. Finally, save pointer to last-acked segment. When retrying, retrieve segments for resending relative to this pointer. When updating last ack, start at this pointer. Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il> Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-03-20IB/uverbs: Return actual capacity from create SRQ operationDotan Barak1-1/+4
Pass actual capacity of created SRQ back to userspace, so that userspace can report accurate capacities. This requires an ABI bump, to change struct ib_uverbs_create_srq_resp. Signed-off-by: Dotan Barak <dotanb@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-03-20IB/mthca: Return actual capacity from create_srqDotan Barak1-2/+6
Have mthca's create_srq method return the actual capacity of the SRQ that gets created. Also update comments in <rdma/ib_verbs.h> to clarify that this is what is expected from ib_create_srq(). Signed-off-by: Dotan Barak <dotanb@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-03-20IB/uverbs: Fix alignment of struct ib_uverbs_create_qp_respRoland Dreier1-1/+2
The size of struct ib_uverbs_create_qp_resp is not even multiple of 8 bytes. This causes problems for low-level drivers that add private data after the structure: 32-bit userspace will look in the wrong place for a response from a 64-bit kernel. Fix this by adding a reserved field. Also, bump the ABI version because this changes the size of a structure. Pointed out by Hoang-Nam Nguyen <HNGUYEN@de.ibm.com>. Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-03-20IB/uverbs: Support for query SRQ from userspaceDotan Barak1-0/+15
Add support to uverbs to handle querying userspace SRQs (shared receive queues), including adding an ABI for marshalling requests and responses. The kernel midlayer already has the underlying ib_query_srq() function. Signed-off-by: Dotan Barak <dotanb@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-03-20IB/uverbs: Support for query QP from userspaceDotan Barak1-0/+41
Add support to uverbs to handle querying userspace QPs (queue pairs), including adding an ABI for marshalling requests and responses. The kernel midlayer already has the underlying ib_query_qp() function. Signed-off-by: Dotan Barak <dotanb@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-03-20IB: Whitespace cleanupsRoland Dreier1-2/+2
Remove trailing whitespace and fix indentation that with spaces instead of tabs. Signed-off-by: Roland Dreier <rolandd@cisco.com>
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