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2019-03-26RDMA: Use __packed annotation instead of __attribute__ ((packed))Erez Alfasi1-2/+2
"__attribute__" set of macros has been standardized, have became more potentially portable and consistent code back in v2.6.21 by commit 82ddcb040 ("[PATCH] extend the set of "__attribute__" shortcut macros"). Moreover, nowadays checkpatch.pl warns about using __attribute__((packed)) instead of __packed. This patch converts all the "__attribute__ ((packed))" annotations to "__packed" within the RDMA subsystem. Signed-off-by: Erez Alfasi <ereza@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-09IB/core: Don't register each MAD agent for LSM notifierDaniel Jurgens1-2/+1
When creating many MAD agents in a short period of time, receive packet processing can be delayed long enough to cause timeouts while new agents are being added to the atomic notifier chain with IRQs disabled. Notifier chain registration and unregstration is an O(n) operation. With large numbers of MAD agents being created and destroyed simultaneously the CPUs spend too much time with interrupts disabled. Instead of each MAD agent registering for it's own LSM notification, maintain a list of agents internally and register once, this registration already existed for handling the PKeys. This list is write mostly, so a normal spin lock is used vs a read/write lock. All MAD agents must be checked, so a single list is used instead of breaking them down per device. Notifier calls are done under rcu_read_lock, so there isn't a risk of similar packet timeouts while checking the MAD agents security settings when notified. Signed-off-by: Daniel Jurgens <danielj@mellanox.com> Reviewed-by: Parav Pandit <parav@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Acked-by: Paul Moore <paul@paul-moore.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-09IB/core: Eliminate a hole in MAD agent structDaniel Jurgens1-2/+2
Move the security related fields above the u8s to eliminate a hole in the struct. pahole before: struct ib_mad_agent { ... u32 hi_tid; /* 48 4 */ u32 flags; /* 52 4 */ u8 port_num; /* 56 1 */ u8 rmpp_version; /* 57 1 */ /* XXX 6 bytes hole, try to pack */ /* --- cacheline 1 boundary (64 bytes) --- */ void * security; /* 64 8 */ bool smp_allowed; /* 72 1 */ bool lsm_nb_reg; /* 73 1 */ /* XXX 6 bytes hole, try to pack */ struct notifier_block lsm_nb; /* 80 24 */ /* XXX last struct has 4 bytes of padding */ /* size: 104, cachelines: 2, members: 14 */ ... }; pahole after: struct ib_mad_agent { ... u32 hi_tid; /* 48 4 */ u32 flags; /* 52 4 */ void * security; /* 56 8 */ /* --- cacheline 1 boundary (64 bytes) --- */ struct notifier_block lsm_nb; /* 64 24 */ /* XXX last struct has 4 bytes of padding */ u8 port_num; /* 88 1 */ u8 rmpp_version; /* 89 1 */ bool smp_allowed; /* 90 1 */ bool lsm_nb_reg; /* 91 1 */ /* size: 96, cachelines: 2, members: 14 */ ... }; Signed-off-by: Daniel Jurgens <danielj@mellanox.com> Reviewed-by: Parav Pandit <parav@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-12-11IB/core: Add CapabilityMask2 to port attributesMichael Guralnik1-0/+10
CapabilityMask2 was added in IB Spec 1.3 under PortInfo attribute. The new Capapbility mask is needed in order to expose the new 2X width and HDR speed. Signed-off-by: Michael Guralnik <michaelgur@mellanox.com> Reviewed-by: Majd Dibbiny <majd@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-07-10RDMA: Fix storage of PortInfo CapabilityMask in the kernelJason Gunthorpe1-0/+33
The internal flag IP_BASED_GIDS was added to a field that was being used to hold the port Info CapabilityMask without considering the effects this will have. Since most drivers just use the value from the HW MAD it means IP_BASED_GIDS will also become set on any HW that sets the IBA flag IsOtherLocalChangesNoticeSupported - which is not intended. Fix this by keeping port_cap_flags only for the IBA CapabilityMask value and store unrelated flags externally. Move the bit definitions for this to ib_mad.h to make it clear what is happening. To keep the uAPI unchanged define a new set of flags in the uapi header that are only used by ib_uverbs_query_port_resp.port_cap_flags which match the current flags supported in rdma-core, and the values exposed by the current kernel. Fixes: b4a26a27287a ("IB: Report using RoCE IP based gids in port caps") Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2017-05-23IB/core: Enforce security on management datagramsDaniel Jurgens1-0/+4
Allocate and free a security context when creating and destroying a MAD agent. This context is used for controlling access to PKeys and sending and receiving SMPs. When sending or receiving a MAD check that the agent has permission to access the PKey for the Subnet Prefix of the port. During MAD and snoop agent registration for SMI QPs check that the calling process has permission to access the manage the subnet and register a callback with the LSM to be notified of policy changes. When notificaiton of a policy change occurs recheck permission and set a flag indicating sending and receiving SMPs is allowed. When sending and receiving MADs check that the agent has access to the SMI if it's on an SMI QP. Because security policy can change it's possible permission was allowed when creating the agent, but no longer is. Signed-off-by: Daniel Jurgens <danielj@mellanox.com> Acked-by: Doug Ledford <dledford@redhat.com> [PM: remove the LSM hook init code] Signed-off-by: Paul Moore <paul@paul-moore.com>
2017-05-01IB/SA: Add support to query OPA path recordsDasaratharaman Chandramouli1-0/+13
When the bit 26 of capmask2 field in OPA classport info query is set, SA will query for OPA path records instead of querying for IB path records. Note that OPA path records can only be queried by kernel ULPs. Userspace clients continue to query IB path records. Reviewed-by: Don Hiatt <don.hiatt@intel.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-04-29IB/core: Move opa_class_port_info definition to header fileDasaratharaman Chandramouli1-0/+25
Both opa_vnic and the hfi driver use the same opa_classport_info definition. We will also have ib_sa capable of querying opa class port info and would need this definition. Move it to ib_mad.h for everyone to use. Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-04-25IB/core: change the return type to voidZhu Yanjun1-1/+1
The function ib_unregister_mad_agent always returns zero. And this returned value is not checked. As such, chane the return type to void. CC: Joe Jin <joe.jin@oracle.com> CC: Junxiao Bi <junxiao.bi@oracle.com> Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com> Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com> Reviewed-by: Hal Rosenstock <hal@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-12-14IB/mad: Eliminate redundant SM class version defines for OPAHal Rosenstock1-1/+1
and rename class version define to indicate SM rather than SMP or SMI Signed-off-by: Hal Rosenstock <hal@mellanox.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-05-25IB/core: Introduce capabilitymask2 field in ClassPortInfo madErez Shitrit1-2/+58
Change struct ib_class_port_info to conform to IB Spec 1.3 That in order to get specific capability mask from ClassPortInfo mad. >From the IB Spec, ClassPortInfo section: "CapabilityMask2 Bits 0-26: Additional class-specific capabilities... RespTimeValue the rest 5 bits" The new struct now has one field for capabilitymask2 (previously was the reserved field) and the resp_time field. And it fixes up qib and srpt, use of the field repurposed to be used as capabilitymask2: IB/qib: Change pma_get_classportinfo IB/srpt: Adjust the use of ib_class_port_info Signed-off-by: Erez Shitrit <erezsh@mellanox.com> Reviewed-by: Leon Romanovsky <leonro@mellanox.com> Reviewed-by: Hal Rosenstock <hal@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-03-03IB/core: Documentation fix in the MAD header fileHal Rosenstock1-2/+2
In ib_mad.h, ib_mad_snoop_handler uses send_buf rather than send_wr Signed-off-by: Hal Rosenstock <hal@mellanox.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-01-19IB/mad: pass ib_mad_send_buf explicitly to the recv_handlerChristoph Hellwig1-0/+2
Stop abusing wr_id and just pass the parameter explicitly. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hal Rosenstock <hal@mellanox.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-12-08IB/mad: Require CM send method for everything except ClassPortInfoHal Rosenstock1-0/+2
Receipt of CM MAD with other than the Send method for an attribute other than the ClassPortInfo attribute is invalid. CM attributes other than ClassPortInfo only use the send method. The SRP initiator does not maintain a timeout policy for CM connect requests relies on the CM layer to do that. The result was that the SRP initiator hung as the connect request never completed. A new SRP target has been observed to respond to Send CM REQ with GetResp of CM REQ with bad status. This is non conformant with IBA spec but exposes a vulnerability in the current MAD/CM code which will respond to the incoming GetResp of CM REQ as if it was a valid incoming Send of CM REQ rather than tossing this on the floor. It also causes the MAD layer not to retransmit the original REQ even though it has not received a REP. Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Hal Rosenstock <hal@mellanox.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-09-03IB/core: Move SM class defines from ib_mad.h to ib_smi.hIra Weiny1-45/+0
When the hfi1 driver was added these definitions were moved from the qib driver to ib_mad.h to be used by both qib and hfi1. They should have been moved to ib_smi.h instead. Fixes: d4ab347005fb ("IB/core: Add core header changes needed for OPA") Reviewed-by: Hal Rosenstock <hal@mellanox.com> Signed-off-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-09-03IB/core: Remove unnecessary defines from ib_mad.hIra Weiny1-12/+0
Remove the unused IB_NOTICE_REPRESS_* defines. When the hfi1 driver was added these definitions were moved from the qib driver to ib_mad.h. They should have been removed instead. Fixes: d4ab347005fb ("IB/core: Add core header changes needed for OPA") Signed-off-by: Ira Weiny <ira.weiny@intel.com> Reviewed-by: Hal Rosenstock <hal@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-31IB/mad: Remove ib_get_dma_mr callsJason Gunthorpe1-1/+0
The pd now has a local_dma_lkey member which completely replaces ib_get_dma_mr, use it instead. Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-08-29IB/core: Add core header changes needed for OPADennis Dalessandro1-0/+138
This patch adds the value of the CNP opcode to the existing list of enumerated opcodes in ib_pack.h Add common OPA header definitions for driver build: - opa_port_info.h - opa_smi.h - hfi1_user.h Additionally, ib_mad.h, has additional definitions that are common to ib_drivers including: - trap support - cca support The qib driver has the duplication removed in favor those in ib_mad.h Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Reviewed-by: John, Jubin <jubin.john@intel.com> Signed-off-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12IB/mad: Add final OPA MAD processingIra Weiny1-0/+8
For devices which support OPA MADs 1) Use previously defined SMP support functions. 2) Pass correct base version to ib_create_send_mad when processing OPA MADs. 3) Process out_mad_key_index returned by agents for a response. This is necessary because OPA SMP packets must carry a valid pkey. 4) Carry the correct segment size (OPA vs IBTA) of RMPP messages within ib_mad_recv_wc. 5) Handle variable length OPA MADs by: * Adjusting the 'fake' WC for locally routed SMP's to represent the proper incoming byte_len * out_mad_size is used from the local HCA agents 1) when sending agent responses on the wire 2) when passing responses through the local_completions function NOTE: wc.byte_len includes the GRH length and therefore is different from the in_mad_size specified to the local HCA agents. out_mad_size should _not_ include the GRH length as it is added Signed-off-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12IB/mad: Add partial Intel OPA MAD supportIra Weiny1-3/+21
This patch is the first of 3 which adds processing of OPA MADs 1) Add Intel Omni-Path Architecture defines 2) Increase max management version to accommodate OPA 3) update ib_create_send_mad If the device supports OPA MADs and the MAD being sent is the OPA base version alter the MAD size and sg lengths as appropriate Signed-off-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12IB/core: Add ability for drivers to report an alternate MAD size.Ira Weiny1-0/+1
Add max MAD size to the device immutable data set and have all drivers that support MADs report the current IB MAD size (IB_MGMT_MAD_SIZE) to the core. Verify MAD size data in both the MAD core and when reading the immutable data. OPA drivers will report alternate MAD sizes in subsequent patches. Signed-off-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12IB/mad: Support alternate Base Versions when creating MADsIra Weiny1-1/+3
In preparation to support the new OPA MAD Base version, add a base version parameter to ib_create_send_mad and set it to IB_MGMT_BASE_VERSION for current users. Definition of the new base version and it's processing will occur in later patches. Signed-off-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-20IB/mad: Add const qualifiers to query only functionsIra Weiny1-1/+1
The following functions only need read access to the data passed to them. ib_mad_kernel_rmpp_agent is_rmpp_data_mad rcv_has_same_gid ib_find_send_mad Clarify with const specifiers Signed-off-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-20IB/mad: Change ib_response_mad signature argumentsIra Weiny1-1/+1
ib_response_mad only needs read access to the MAD header, not write access to the entire mad struct, so replace struct ib_mad with const struct ib_mad_hdr Reviewed-By: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Reviewed-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2014-08-11IB/mad: Add user space RMPP supportIra Weiny1-0/+11
Using the new registration mechanism, define a flag that indicates the user wishes to process RMPP messages in user space rather than have the kernel process them. Signed-off-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-08-11IB/mad: add new ioctl to ABI to support new registration optionsIra Weiny1-1/+6
Registrations options are specified through flags. Definitions of flags will be in subsequent patches. Signed-off-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
2012-05-19IB/core: Fix IB_SA_COMP_MASK macroJack Morgenstein1-1/+1
It needs parentheses around the argument, so that it can be used with complex arguments (e.g., "n+5"). Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by: Roland Dreier <roland@purestorage.com>
2012-02-26IB/mad: Add MAD error codes from IBA specSwapna Thete1-0/+9
Add defines for MAD error codes so that they can be used when returning error responses. Signed-off-by: Swapna Thete <swapna.thete@qlogic.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
2009-03-25Merge branches 'cxgb3', 'endian', 'ipath', 'ipoib', 'iser', 'mad', 'misc', ↵Roland Dreier1-2/+2
'mlx4', 'mthca', 'nes' and 'sysfs' into for-next
2009-02-27IB/mad: Fix RMPP header RRespTime manipulationRamachandra K1-1/+1
Fix ib_set_rmpp_flags() to use the correct bit mask for RRespTime. In the 8-bit field of the RMPP header, the first 5 bits are RRespTime and next 3 bits are RMPPFlags. Hence to retain the first 5 bits, the mask should be 0xF8 instead of 0xF1. ack_recv()-->format_ack() calls ib_set_rmpp_flags() and due to the incorrect ANDing with 0xF1, RRespTime got changed incorrectly and RMPP Acks sent back always had a RRespTime of 0x1E (30) which caused the other end to consider the time outs to be approximately 4297 seconds (i.e. in the order of 4*2^30) instead of the usual ~4 seconds (order of 4*2^20). Signed-off-by: Ramachandra K <ramachandra.kuchimanchi@qlogic.com> Acked-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2009-01-18IB: Remove __constant_{endian} usesHarvey Harrison1-1/+1
The base versions handle constant folding just fine, use them directly. The replacements are OK in the include/ files as they are not exported to userspace so we don't need the __ prefixed versions. This patch does not affect code generation at all. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-07-15RDMA: Improve include file coding styleDotan Barak1-10/+7
Remove subversion $Id lines and improve readability by fixing other coding style problems pointed out by checkpatch.pl. Signed-off-by: Dotan Barak <dotanba@gmail.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-01-26IB/mad: Report number of times a mad was retriedSean Hefty1-1/+3
To allow ULPs to tune timeout values and capture retry statistics, report the number of times that a mad send operation was retried. For RMPP mads, report the total number of times that the any portion (send window) of the send operation was retried. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-08-03IB: Include <linux/list.h> from <rdma/ib_mad.h>Dotan Barak1-0/+2
ib_mad.h uses struct list_head, so while linux/list.h seems to be pulled in indirectly by one of the headers it includes, the right thing is to include linux/list.h directly. Signed-off-by: Dotan Barak <dotanb@dev.mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-11IB/sa: Make sure SA queries use default P_KeySean Hefty1-0/+3
MADs sent to the SA should use the the default P_Key (0x7fff/0xffff). There's no requirement that the default P_Key is stored at index 0 in the local P_Key table, so add code to the sa_query module to look up the index of the default P_Key when creating an address handle for the SA (which is done any time the P_Key table might change), and use this index for all SA queries. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-05-03PCI: Cleanup the includes of <linux/pci.h>Jean Delvare1-2/+0
I noticed that many source files include <linux/pci.h> while they do not appear to need it. Here is an attempt to clean it all up. In order to find all possibly affected files, I searched for all files including <linux/pci.h> but without any other occurence of "pci" or "PCI". I removed the include statement from all of these, then I compiled an allmodconfig kernel on both i386 and x86_64 and fixed the false positives manually. My tests covered 66% of the affected files, so there could be false positives remaining. Untested files are: arch/alpha/kernel/err_common.c arch/alpha/kernel/err_ev6.c arch/alpha/kernel/err_ev7.c arch/ia64/sn/kernel/huberror.c arch/ia64/sn/kernel/xpnet.c arch/m68knommu/kernel/dma.c arch/mips/lib/iomap.c arch/powerpc/platforms/pseries/ras.c arch/ppc/8260_io/enet.c arch/ppc/8260_io/fcc_enet.c arch/ppc/8xx_io/enet.c arch/ppc/syslib/ppc4xx_sgdma.c arch/sh64/mach-cayman/iomap.c arch/xtensa/kernel/xtensa_ksyms.c arch/xtensa/platform-iss/setup.c drivers/i2c/busses/i2c-at91.c drivers/i2c/busses/i2c-mpc.c drivers/media/video/saa711x.c drivers/misc/hdpuftrs/hdpu_cpustate.c drivers/misc/hdpuftrs/hdpu_nexus.c drivers/net/au1000_eth.c drivers/net/fec_8xx/fec_main.c drivers/net/fec_8xx/fec_mii.c drivers/net/fs_enet/fs_enet-main.c drivers/net/fs_enet/mac-fcc.c drivers/net/fs_enet/mac-fec.c drivers/net/fs_enet/mac-scc.c drivers/net/fs_enet/mii-bitbang.c drivers/net/fs_enet/mii-fec.c drivers/net/ibm_emac/ibm_emac_core.c drivers/net/lasi_82596.c drivers/parisc/hppb.c drivers/sbus/sbus.c drivers/video/g364fb.c drivers/video/platinumfb.c drivers/video/stifb.c drivers/video/valkyriefb.c include/asm-arm/arch-ixp4xx/dma.h sound/oss/au1550_ac97.c I would welcome test reports for these files. I am fine with removing the untested files from the patch if the general opinion is that these changes aren't safe. The tested part would still be nice to have. Note that this patch depends on another header fixup patch I submitted to LKML yesterday: [PATCH] scatterlist.h needs types.h http://lkml.org/lkml/2007/3/01/141 Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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>
2006-03-30IB/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>
2005-10-25[IB] Fix MAD layer DMA mappings to avoid touching data buffer once mappedSean Hefty1-32/+34
The MAD layer was violating the DMA API by touching data buffers used for sends after the DMA mapping was done. This causes problems on non-cache-coherent architectures, because the device doing DMA won't see updates to the payload buffers that exist only in the CPU cache. Fix this by having all MAD consumers use ib_create_send_mad() to allocate their send buffers, and moving the DMA mapping into the MAD layer so it can be done just before calling send (and after any modifications of the send buffer by the MAD layer). Tested on a non-cache-coherent PowerPC 440SPe system. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2005-10-09[PATCH] gfp flags annotations - part 1Al Viro1-1/+1
- added typedef unsigned int __nocast gfp_t; - replaced __nocast uses for gfp flags with gfp_t - it gives exactly the same warnings as far as sparse is concerned, doesn't change generated code (from gcc point of view we replaced unsigned int with typedef) and documents what's going on far better. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-21[IB] Add MAD data field size definitionsSean Hefty1-4/+11
Clean up code by using enums instead of hard-coded magic numbers. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2005-09-10[PATCH] IB: Add struct for ClassPortInfoRoland Dreier1-0/+21
Add structure definition for ClassPortInfo format. This is needed for (at least) handling CM redirects. Signed-off-by: Roland Dreier <rolandd@cisco.com>
2005-08-27[PATCH] IB: move include files to include/rdmaRoland Dreier1-0/+579
Move the InfiniBand headers from drivers/infiniband/include to include/rdma. This allows InfiniBand-using code to live elsewhere, and lets us remove the ugly EXTRA_CFLAGS include path from the InfiniBand Makefiles. Signed-off-by: Roland Dreier <rolandd@cisco.com>
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-12 20:35:02 +0300