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path: root/drivers/infiniband/ulp/iser/iser_memory.c
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* IB/iser: Use pd->local_dma_lkeyJason Gunthorpe2015-08-301-1/+1
| | | | | | | | | | | | | Replace all leys with pd->local_dma_lkey. This driver does not support iWarp, so this is safe. The insecure use of ib_get_dma_mr is thus isolated to an rkey, and this looks trivially fixed by forcing the use of registration in a future patch. Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Chain all iser transaction send work requestsSagi Grimberg2015-08-301-67/+53
| | | | | | | | | | | | | | | | Chaning of send work requests benefits performance by reducing the send queue lock contention (acquired in ib_post_send) and saves us HW doorbells which is posted only once. Currently, in normal IO flows iser does not chain the CDB send work request with the registration work request. Also in PI flows, signature work requests are not chained as well. Lets chain those and post only once. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Add debug prints to the various memory registration methodsSagi Grimberg2015-08-301-1/+9
| | | | | | | | | | Easier to debug when we have the registration details. This patch does not change any functionality. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Adir Lev <adirl@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Support up to 8MB data transfer in a single commandSagi Grimberg2015-08-301-2/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | iser support up to 512KB data transfer in a single scsi command. This means that larger IOs will split to different request. While iser can easily saturate FDR/EDR wires, some arrays are fine tuned for 1MB (or larger) IO sizes, hence add an option to support larger transfers (up to 8MB) if the device allows it. Given that a few target implementations don't support data transfers of more than 512KB by default and the fact that larger IO sizes require more resources, we introduce a module parameter to determine the maximum number of 512B sectors in a single scsi command. Users that are interested in larger transfers can change this value given that the target supports larger transfers. At the moment, iser works in 4K pages granularity, In a later stage we will get it to work with system page size instead. IO operations that consists of N pages will need a page vector of size N+1 in case the first SG element contains an offset. Given that some devices allocates memory regions in powers of 2, this means that allocating a region with N+1 pages, will result in region resources allocation of the next power of 2. Since we don't want that to happen, in case we are in the limit of IO size supported and the first SG element has an offset, we align the SG list using a bounce buffer (which is OK given that this is not likely to happen a lot). Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Unify fast memory registration flowsSagi Grimberg2015-08-301-114/+96
| | | | | | | | | | | | | | | | | | iser_reg_rdma_mem_[fastreg|fmr] share a lot of code, and logically do the same thing other than the buffer registration method itself (iser_fast_reg_mr vs. iser_fast_reg_fmr). The DIF logic is not implemented in the FMR flow as there is no existing device that supports FMRs and Signature feature. This patch unifies the flow in a single routine iser_reg_rdma_mem and just split to fmr/frwr for the buffer registration itself. Also, for symmetry reasons, unify iser_unreg_rdma_mem (which will call the relevant device specific unreg routine). Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Adir Lev <adirl@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Make reg_desc_get a per device routineSagi Grimberg2015-08-301-10/+28
| | | | | | | | | | | As for fmrs we will hold a single registration descriptor as no need for multiple like in the frwr mode (descriptor for each task). This change helps unifying the duplicate registration code paths. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Adir Lev <adirl@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Rename iser_reg_page_vec to iser_fast_reg_fmrSagi Grimberg2015-08-301-8/+8
| | | | | | | | | | Also, change a name of a local variable. This patch does not change any functionality. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Adir Lev <adirl@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Maintain connection fmr_pool under a single registration descriptorAdir Lev2015-08-301-12/+16
| | | | | | | | | | | | | | | | | This will allow us to unify the memory registration code path between the various methods which vary by the device capabilities. This change will make it easier and less intrusive to remove fmr_pools from the code when we'd want to. The reason we use a single descriptor is to avoid taking a redundant spinlock when working with FMRs. We also change the signature of iser_reg_page_vec to make it match iser_fast_reg_mr (and the future indirect registration method). Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Adir Lev <adirl@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Introduce iser registration pool structSagi Grimberg2015-08-301-14/+18
| | | | | | | | | | | Instead of having it a part of the connection structure, have it be under a dedicated (embedded) structure in the connection. A logical separation of the registration pool and the connection structure. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Adir Lev <adirl@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Introduce iser_reg_opsSagi Grimberg2015-08-301-0/+35
| | | | | | | | | Move all the per-device function pointers to an easy extensible iser_reg_ops structure that contains all the iser registration operations. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Rename struct fast_reg_descriptor -> iser_fr_descSagi Grimberg2015-08-301-5/+5
| | | | | | | | | Avoid struct names without iser_ prefix. This patch does not change any functionality. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Introduce struct iser_reg_resourcesSagi Grimberg2015-08-301-21/+14
| | | | | | | | | | | | | | | | | | | | Have fast_reg_descriptor hold struct iser_reg_resources (mr, frpl, valid flag). This will be useful when the actual buffer registration routines will be passed with the needed registration resources (i.e. iser_reg_resources) without being aware of their nature (i.e. data or protection). In order to achieve this, we remove reg_indicators flags container and place specific flags (mr_valid) within iser_reg_resources struct. We also place the sig_mr_valid and sig_protcted flags in iser_pi_context. This patch also modifies iser_fast_reg_mr to receive the reg_resources instead of the fast_reg_descriptor and a data/protection indicator. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Adir Lev <adirl@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Remove an unneeded print for unaligned memorySagi Grimberg2015-08-301-11/+9
| | | | | | | | | We can do it in iser_aligned_data_len instead and it will save us an argument that is passed to fall_to_counce_buf just for the print. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Rewrite bounce buffer code pathSagi Grimberg2015-04-151-78/+131
| | | | | | | | | | | | | | | | | | In some rare cases, IO operations may be not aligned to page boundaries. This prevents iser from performing fast memory registration. In order to overcome that iser uses a bounce buffer to carry the transaction. We basically allocate a buffer in the size of the transaction and perform a copy. The buffer allocation using kmalloc is too restrictive since it requires higher order (atomic) allocations for large transactions (which may result in memory exhaustion fairly fast for some workloads). We rewrite the bounce buffer code path to allocate scattered pages and perform a copy between the transaction sg and the bounce sg. Reported-by: Alex Lyakas <alex@zadarastorage.com> Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Remove code duplication for a single DMA entrySagi Grimberg2015-04-151-27/+21
| | | | | | | | | | | | In singleton scatterlists, DMA memory registration code is taken both for Fastreg and FMR code paths. Move it to a function. This patch does not change any functionality. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Adir Lev <adirl@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Pass struct iser_mem_reg to iser_fast_reg_mr and iser_reg_sig_mrSagi Grimberg2015-04-151-43/+32
| | | | | | | | | | | | | | Instead of passing ib_sge as output variable, we pass the mem_reg pointer to have the routines fill the rkey as well. This reduces code duplication and extra assignments. This is a preparation step to unify some registration logics together. Also, pass iser_fast_reg_mr the fastreg descriptor directly. This patch does not change any functionality. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Adir Lev <adirl@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Modify struct iser_mem_reg membersSagi Grimberg2015-04-151-15/+15
| | | | | | | | | | | | No need to keep lkey, va, len variables, we can keep them as struct ib_sge. This will help when we change the memory registration logic. This patch does not change any functionality. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Adir Lev <adirl@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Make fastreg pool cache friendlySagi Grimberg2015-04-151-1/+1
| | | | | | | | | | Memory regions are resources that are saved in the device caches. Increase the probability for a cache hit by adding the MRU descriptor to pool head. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Move fastreg descriptor pool get/put to helper functionsSagi Grimberg2015-04-151-18/+32
| | | | | | | | | | | | | | | Instead of open-coding connection fastreg pool get/put, we introduce iser_reg_desc[get|put] helpers. We aren't setting these static as this will be a per-device routine later on. Also, cleanup iser_unreg_rdma_mem_fastreg a bit. This patch does not change any functionality. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Adir Lev <adirl@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Merge build page-vec into register page-vecSagi Grimberg2015-04-151-58/+33
| | | | | | | | | | | | | No need for these two separate. Keep it in a single routine like in the fastreg case. This will also make iser_reg_page_vec closer to iser_fast_reg_mr arguments. This is a preparation step for registration flow refactor. This patch does not change any functionality. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Adir Lev <adirl@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Get rid of struct iser_rdma_regdSagi Grimberg2015-04-151-28/+28
| | | | | | | | | | | This struct members other than struct iser_mem_reg are unused, so remove it altogether. This patch does not change any functionality. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Adir Lev <adirl@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Remove redundant assignments in iser_reg_page_vecSagi Grimberg2015-04-151-5/+2
| | | | | | | | | | | Buffer length was assigned twice, and no reason to set va to io_addr and then add the offset, just set va to io_addr + offset. This patch does not change any functionality. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Adir Lev <adirl@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Move memory reg/dereg routines to iser_memory.cSagi Grimberg2015-04-151-0/+88
| | | | | | | | | | | As memory registration/de-registration methods, lets move them to their natural location. While we're at it, make iser_reg_page_vec routine static. This patch does not change any functionality. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Don't pass ib_device to fall_to_bounce_buff routineSagi Grimberg2015-04-151-6/+6
| | | | | | | | | | | | No need to pass that, we can take it from the task. In a later stage, this function will be invoked according to a device capability. This patch does not change any functionality. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Adir Lev <adirl@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Remove a redundant struct iser_data_bufSagi Grimberg2015-04-151-35/+23
| | | | | | | | | | | | | No need to keep two iser_data_buf structures just in case we use mem copy. We can avoid that just by adding a pointer to the original sg. So keep only two iser_data_buf per command (data and protection) and pass the relevant data_buf to bounce buffer routine. This patch does not change any functionality. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Adir Lev <adirl@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Remove redundant cmd_data_len calculationSagi Grimberg2015-04-151-4/+1
| | | | | | | | | | | | | This code was added before we had protection data length calculation (in iser_send_command), so we needed to calc the sg data length from the sg itself. This is not needed anymore. This patch does not change any functionality. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Adir Lev <adirl@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* IB/iser: Use correct dma direction when unmapping SGsRoi Dayan2015-02-131-3/+6
| | | | | | | | | | We always unmap SGs with the same direction instead of unmapping with the direction the mapping was done, fix that. Fixes: 9a8b08fad2ef ("IB/iser: Generalize iser_unmap_task_data and [...]") Signed-off-by: Roi Dayan <roid@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/iser: DIX updateSagi Grimberg2014-12-151-46/+16
| | | | | | | | | | | | | | | Following few recent Block integrity updates, we align the iSER data integrity offload settings with: - Deprecate pi_guard module param - Expose support for DIX type 0. - Use scsi_transfer_length for the transfer length - Get pi_interval, ref_tag, ref_remap, bg_type and check_mask setting from scsi_cmnd Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/iser: Remove redundant is_mr indicatorSagi Grimberg2014-12-151-7/+2
| | | | | | | | | It is enough to check mem_h pointer assignment, mem_h == NULL will indicate that buffer is not registered using mr. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/iser: Centralize memory region invalidation to a functionSagi Grimberg2014-12-151-16/+16
| | | | | | | | Eliminates code duplication. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/iser: Fix sparse warningsSagi Grimberg2014-12-151-1/+0
| | | | | | | | | | Use uintptr_t to handle wr_id casting, which was found by Kbuild test robot and smatch. Also remove an internal definition of variable which potentially shadows an external one (and make sparse happy). Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/mlx5, iser, isert: Add Signature API additionsSagi Grimberg2014-10-091-26/+24
| | | | | | | | | | | | | | | | | | | | | | | | Expose more signature setting parameters. We modify the signature API to allow usage of some new execution parameters relevant to data integrity feature. This patch modifies ib_sig_domain structure by: - Deprecate DIF type in signature API (operation will be determined by the parameters alone, no DIF type awareness) - Add APPTAG check bitmask (for input domain) - Add REFTAG remap (increment) flag for each domain - Add APPTAG/REFTAG escape options for each domain The mlx5 driver is modified to follow the new parameters in HW signature setup. At the moment the callers (iser/isert) hard-code new parameters (by DIF type). In the future, callers will retrieve them from the scsi command structure. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/iser: Centralize ib_sig_domain settingsSagi Grimberg2014-10-091-18/+18
| | | | | | | | | | Later there will be more parameters to set, so we want to do it in a centralized place. This patch does not change any functionality. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/iser: Remove redundant assignmentSagi Grimberg2014-10-091-1/+0
| | | | | | | We clear the struct before - no need to do 0 assignment. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/iser: Re-introduce ib_connSagi Grimberg2014-10-091-26/+26
| | | | | | | | | | | Structure that describes the RDMA relates connection objects. Static member of iser_conn. This patch does not change any functionality Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/iser: Rename ib_conn -> iser_connSagi Grimberg2014-10-091-27/+27
| | | | | | | | | | | | | | | | Two reasons why we choose to do this: 1. No point today calling struct iser_conn by another name ib_conn 2. In the next patches we will restructure iser control plane representation - struct iser_conn: connection logical representation - struct ib_conn: connection RDMA layout representation This patch does not change any functionality. Signed-off-by: Ariel Nahum <arieln@mellanox.com> Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/iser: Update Mellanox copyright noteOr Gerlitz2014-04-011-1/+1
| | | | | | | Update Mellanox copyrights for 2014 on the iser initiator driver. Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/iser: Remove struct iscsi_iser_connAriel Nahum2014-04-011-10/+10
| | | | | | | | | | | | | | | | The iscsi stack has existing mechanisms to link back and forth between the iscsi connection and the iscsi transport (e.g iser/tcp) connection. This is done through a dd_data pointer field in struct iscsi_conn which can be set to point to the transport connection, etc. The iscsi_iser_conn structure was used to get this linking done in another way, which is uneeded and adds extra complication to the iser code, so we just remove it. Signed-off-by: Ariel Nahum <arieln@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/iser: Support T10-PI operationsSagi Grimberg2014-03-171-22/+235
| | | | | | | | | | | | | | | | | | | Add logic to initialize protection information entities. Upon each iSCSI task, we keep the scsi_cmnd in order to query the scsi protection operations and reference to protection buffers. Modify iser_fast_reg_mr to receive indication whether it is registering the data or protection buffers. In addition introduce iser_reg_sig_mr which performs fast registration work-request for a signature enabled memory region (IB_WR_REG_SIG_MR). In this routine we set all the protection relevants for the device to offload protection data-transfer and verification. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Alex Tabachnik <alext@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/iser: Generalize fall_to_bounce_buf routineSagi Grimberg2014-03-171-24/+29
| | | | | | | | | | | Unaligned SG-lists may also happen for protection information. Generalize bounce buffer routine to handle any iser_data_buf which may be data and/or protection. This patch does not change any functionality. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/iser: Generalize iser_unmap_task_data and finalize_rdma_unaligned_sgSagi Grimberg2014-03-171-24/+16
| | | | | | | | | | | | This routines operates on data buffers and may also work with protection infomation buffers. So we generalize them to handle an iser_data_buf which can be the command data or command protection information. This patch does not change any functionality. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/iser: Replace fastreg descriptor valid bool with indicators containerSagi Grimberg2014-03-171-2/+2
| | | | | | | | | | | | In T10-PI support we will have memory keys for protection buffers and signature transactions. We prefer to compact indicators rather than keeping multiple bools. This commit does not change any functionality. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Alex Tabachnik <alext@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/iser: Push the decision what memory key to use into fast_reg_mr routineSagi Grimberg2014-03-171-42/+59
| | | | | | | | | | | | | | This is a preparation step for T10-PI offload support. We prefer to push the desicion of which mkey to use (global or fastreg) to iser_fast_reg_mr. We choose to do this since in T10-PI we may need to register for protection buffers and in this case we wish to simplify iser_fast_reg_mr instead of repeating the logic of which key to use. This patch does not change any functionality. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Alex Tabachnik <alext@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/iser: Avoid FRWR notation, use fastreg insteadSagi Grimberg2014-03-171-14/+14
| | | | | | | | | | | | | FRWR stands for "fast registration work request". We want to avoid calling the fastreg pool with that name, instead we name it fastreg which stands for "fast registration". This pool will include more elements in the future, so it is a good idea to generalize the name. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Alex Tabachnik <alext@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/iser: Suppress completions for fast registration work requestsSagi Grimberg2014-03-171-11/+4
| | | | | | | | | | | In case iSER uses fast registration method, it should not request for successful completions on fast registration nor local invalidate requests. We color wr_id with ISER_FRWR_LI_WRID in order to correctly consume error completions. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/iser: Introduce fast memory registration model (FRWR)Sagi Grimberg2013-08-091-3/+137
| | | | | | | | | | | | | | | | | | | | | | Newer HCAs and Virtual functions may not support FMRs but rather a fast registration model, which we call FRWR - "Fast Registration Work Requests". This model was introduced in 00f7ec36c ("RDMA/core: Add memory management extensions support") and works when the IB device supports the IB_DEVICE_MEM_MGT_EXTENSIONS capability. Upon creating the iser device iser will test whether the HCA supports FMRs. If no support for FMRs, check if IB_DEVICE_MEM_MGT_EXTENSIONS is supported and assign function pointers that handle fast registration and allocation of appropriate resources (fast_reg descriptors). Registration is done using posting IB_WR_FAST_REG_MR to the QP and invalidations using posting IB_WR_LOCAL_INV. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/iser: Place the fmr pool into a union in iser's IB conn structSagi Grimberg2013-08-091-11/+13
| | | | | | | | | | This is preparation step for other memory registration methods to be added. In addition, change reg/unreg routines signature to indicate they use FMRs. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/iser: Handle unaligned SG in separate functionSagi Grimberg2013-08-091-23/+43
| | | | | | | | | | | | | | This routine will be shared with other rdma management schemes. The bounce buffer solution for unaligned SG-lists and the sg_to_page_vec routine are likely to be used for other registration schemes and not just FMR. Move them out of the FMR specific code, and call them from there. Later they will be called also from other reg methods code. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/iser: Use proper debug level value for info printsOr Gerlitz2013-08-091-7/+6
| | | | | | | | | | | Commit 4f363882612 ("IB/iser: Move informational messages from error to info level") set info prints to be emitted at a lower debug level than warning prints, which is a bit odd. Fix that. Also move the prints on unaligned SG from warning to debug level. Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/iser: Add Mellanox copyrightOr Gerlitz2013-06-041-0/+1
| | | | | | | Add Mellanox copyright to the iser initiator source code which I maintain. Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
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