- 13 May, 2016 20 commits
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Lars-Peter Clausen authored
Calling synchronize_irq() right before free_irq() is quite useless. On one hand the IRQ can easily fire again before free_irq() is entered, on the other hand free_irq() itself calls synchronize_irq() internally (in a race condition free way), before any state associated with the IRQ is freed. Patch was generated using the following semantic patch: // <smpl> @@ expression irq; @@ -synchronize_irq(irq); free_irq(irq, ...); // </smpl> Signed-off-by:
Lars-Peter Clausen <lars@metafoo.de> Reviewed-by:
Leon Romanovsky <leonro@mellanox.com> Acked-by: Faisal Latif <faisal.latif#intel.com> Signed-off-by:
Doug Ledford <dledford@redhat.com>
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Julia Lawall authored
The i40iw_vf_cqp_ops structure is never modified, so declare it as const. Done with the help of Coccinelle. Signed-off-by:
Julia Lawall <Julia.Lawall@lip6.fr> Reviewed-by:
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Julia Lawall authored
The i40e_client_ops structure is never modified, so declare it as const. Done with the help of Coccinelle. Signed-off-by:
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Bart Van Assche authored
This makes it easier to test the code path that does not use memory registration (srp_map_sg_dma()). Signed-off-by:
Bart Van Assche <bart.vanassche@sandisk.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Sagi Grimberg <sagi@grimberg.me> Cc: Laurence Oberman <loberman@redhat.com> Signed-off-by:
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Bart Van Assche authored
If both max_sectors and the queue_depth are high enough it can happen that the MR pool is depleted temporarily. This causes the SRP initiator to report mapping failures. Although the SRP initiator recovers from such mapping failures, prevent that this can happen by allocating more memory regions. Additionally, only enable memory registration if at least two pages can be registered per memory region. Reported-by:
Laurence Oberman <loberman@redhat.com> Signed-off-by:
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Bart Van Assche authored
This patch does not change any functionality but makes the next patch in this series easier to read. Signed-off-by:
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Bart Van Assche authored
The SRP initiator allows to set max_sectors to a value that exceeds the largest amount of data that can be mapped at once with an mlx4 HCA using fast registration and a page size of 4 KB. Hence modify ib_map_mr_sg() such that it can map partial sg-elements. If an sg-element has been mapped partially, let the caller know which fraction has been mapped by adjusting *sg_offset. Signed-off-by:
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Bart Van Assche authored
Avoid that the following kernel oops occurs if memory pool allocation fails: BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<ffffffffa048d0a0>] ib_drain_rq+0x0/0x20 [ib_core] Call Trace: [<ffffffffa04af386>] srp_create_target+0xca6/0x13a9 [ib_srp] [<ffffffff813cc863>] dev_attr_store+0x13/0x20 [<ffffffff81214b50>] sysfs_kf_write+0x40/0x50 [<ffffffff81213f1c>] kernfs_fop_write+0x13c/0x180 [<ffffffff81197683>] __vfs_write+0x23/0xf0 [<ffffffff81198744>] vfs_write+0xa4/0x1a0 [<ffffffff81199a44>] SyS_write+0x44/0xa0 [<ffffffff8159e3e9>] entry_SYSCALL_64_fastpath+0x1c/0xac Fixes: 1dc7b1f1 ("IB/srp: use the new CQ API") Signed-off-by:
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Bart Van Assche authored
If an error occurs after srp_fr_pool_get() succeeded and before the descriptor is stored in srp_map_state (*state->fr.next++ = desc) then srp_unmap_data() won't free the newly allocated memory descriptor. Hence free the descriptor explicitly. Fixes: f7f7aab1 ("IB/srp: Convert to new registration API") Signed-off-by:
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Bart Van Assche authored
pr_debug() already prints prefix PFX. Avoid that PFX is printed twice if the debug statement in srp_add_target() is enabled. Fixes: 34aa654e ("IB/srp: Avoid that I/O hangs due to a cable pull during LUN scanning") Signed-off-by:
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Christoph Hellwig authored
Replace the homegrown RDMA READ/WRITE code in isert with the generic API, which also adds iWarp support to the I/O path as a side effect. Note that full iWarp operation will need a few additional patches from Steve. Signed-off-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
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Christoph Hellwig authored
Signed-off-by:
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Christoph Hellwig authored
Replace the homegrown RDMA READ/WRITE code in srpt with the generic API. The only real twist here is that we need to allocate one Linux scatterlist per direct buffer in the SRP command, and chain them before handing them off to the target core. As a side-effect of the conversion the driver will also chain the SEND of the SRP response to the RDMA WRITE WRs for a DATA OUT command, and properly account for RDMA WRITE WRs instead of just for RDMA READ WRs like the driver previously did. We now allocate half of the SQ size to RDMA READ/WRITE contexts, assuming by default one RDMA READ or WRITE operation per command. If a command has multiple operations it will eat into the budget but will still succeed, possible after waiting for WQEs to be available. Also ensure the QPs request the maximum allowed SGEs so that RDMA R/W API works correctly. Signed-off-by:
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Christoph Hellwig authored
The SRP target driver will need to allocate and chain it's own SGLs soon. For this export target_alloc_sgl, and add a new argument to it so that it can allocate an additional chain entry that doesn't point to a page. Also export transport_free_sgl after renaming it to target_free_sgl to free these SGLs again. Signed-off-by:
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Christoph Hellwig authored
This supports both manual mapping of lots of SGEs, as well as using MRs from the QP's MR pool, for iWarp or other cases where it's more optimal. For now, MRs are only used for iWARP transports. The user of the RDMA-RW API must allocate the QP MR pool as well as size the SQ accordingly. Thanks to Steve Wise for testing, fixing and rewriting the iWarp support, and to Sagi Grimberg for ideas, reviews and fixes. Signed-off-by:
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Steve Wise authored
This is the first step toward moving MR invalidation decisions to the core. It will be needed by the upcoming RW API. Signed-off-by:
Steve Wise <swise@opengridcomputing.com> Reviewed-by:
Sagi Grimberg <sagi@grimberg.me> Reviewed-by:
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Christoph Hellwig authored
Signed-off-by:
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Christoph Hellwig authored
Split the XRC magic into a separate function, and return early on failure to make the initialization code readable. Signed-off-by:
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Christoph Hellwig authored
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Christoph Hellwig authored
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- 12 May, 2016 12 commits
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Christoph Hellwig authored
The new RW API will need this. Signed-off-by:
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Doug Ledford authored
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Saeed Mahameed authored
Adding the needed mlx5_ifc hardware bits and structs for the following features: * Add vport to steering commands for SRIOV ACL support * Add mlcr, pcmr and mcia registers for dump module EEPROM * Add support for FCS, beacon led and disable_link bits to hca caps * Add CQE period mode bit in CQ context for CQE based CQ moderation support * Add umr SQ bit for fragmented memory registration * Add needed bits and caps for Striding RQ support In-order to avoid possible future conflicts between rdma and net-next we added all expected updates to this file for this release. If more changes will be submitted, we plan to do it only through one of the subsystems, probably net-next. All updated bits in this patch will be later used in the up-coming submissions to net-next and rdma trees. Signed-off-by:
Saeed Mahameed <saeedm@mellanox.com> Signed-off-by:
Matan Barak <matanb@mellanox.com> Acked-by:
Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by:
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Tariq Toukan authored
All reserved fields after early_vf_enable are off by 1, since early_vf_enable was not explicitly declared as array of size 1. Reserved field before cqe_zip had a wrong size, it should be 0x80 + 0x3f. Fixes: b0844444 ("net/mlx5_core: Introduce access function to read internal timer ") Fixes: b4ff3a36 ("net/mlx5: Use offset based reserved field names in the IFC header file") Signed-off-by:
Tariq Toukan <tariqt@mellanox.com> Signed-off-by:
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Bart Van Assche authored
Signed-off-by:
Sagi Grimberg <sai@grimberg.m> Reviewed-by:
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Bart Van Assche authored
Since all srp_map_finish_fr() callers pass a non-zero value as the fourth argument (sg_nents), the sg_nents == 0 check in that function can be removed. Add a count == 0 check in the caller of that function. Signed-off-by:
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Bart Van Assche authored
The srp_queuecommand() function translates ENOMEM into QUEUE_FULL which causes the SCSI mid-layer to retry the command. All other error codes are translated into DID_ERROR which causes the SCSI command to fail. Return E2BIG if mapping will always fail to prevent that the SCSI mid-layer keeps resubmitting a command forever. Signed-off-by:
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Bart Van Assche authored
This patch does not change any functionality. Signed-off-by:
Sagi Grimberg <sagig@mellanox.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Laurence Oberman <loberman@redhat.com> Reviewed-by:
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Bart Van Assche authored
Ensure that req->nmdesc is set correctly in srp_map_sg() if mapping fails. Avoid that mapping failure causes a memory descriptor leak. Report srp_map_sg() failure to the caller. Signed-off-by:
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Bart Van Assche authored
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Bart Van Assche authored
The free request list was removed through patch "IB/srp: Use block layer tags". Hence update a comment that refers to that free request list. Signed-off-by:
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Bart Van Assche authored
Change one occurrence of "boundries" into "boundaries". Signed-off-by:
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- 05 May, 2016 8 commits
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Doug Ledford authored
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Hariprasad S authored
Use c4iw_ep_disconnect() instead. This is part of getting rid of abort_connection() altogether so we properly clean up on send_abort() failures. This is the last user of abort_connection(), so remove it too. Signed-off-by:
Hariprasad Shenai <hariprasad@chelsio.com> Signed-off-by:
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Hariprasad S authored
In c4iw_ep_disconnect(), if we fail to initiate a close operation, then move the qp to ERROR to disassociate the ep from the qp. Failure to do this will leak the ep resources. Signed-off-by:
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Hariprasad S authored
Instead return whether the caller needs to disconnect. This is part of getting rid of abort_connection() altogether so we properly clean up on send_abort() failures. Signed-off-by:
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Hariprasad S authored
Use c4iw_ep_disconnect() instead. This is part of getting rid of abort_connection() altogether so we properly clean up on send_abort() failures. Signed-off-by:
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Hariprasad S authored
Signed-off-by:
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Hariprasad S authored
Instead, have the caller, rx_data() handle the close/abort like it does for process_mpa_request(). This is part of getting rid of abort_connection() altogether so we properly clean up on send_abort() failures. Signed-off-by:
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Hariprasad S authored
In rx_data(), with the ep in FPDU_MODE, refcnt=2, if we get unexpected streaming data, we call c4iw_modify_rc_qp() and move the qp from RTS -> TERMINATE. In c4iw_modify_rc_qp(), if rdma_fini() returns an error, the ep will be dereferenced (refcnt=1). Then rx_data() calls c4iw_ep_disconnect() which starts the close operation. But if send_halfclose() fails in c4iw_ep_disconnect(), we will call release_ep_resources() derefing the ep which reduces the refcnt to 0 and and frees the ep. However we still has the ep mutex at that point, so we have a touch-after-free bug. There is a similar issue where peer_close() calls c4iw_ep_disconnect(). The solution is to add a reference to the ep in c4iw_ep_disconnect() after acquiring the mutex, and release it after releasing the mutex. Signed-off-by:
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