- 06 Oct, 2016 3 commits
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Parav Pandit authored
This patch fixes below kernel crash on memory registration for rxe and other transport drivers which has dma_ops extension. IB/core invokes ib_map_sg_attrs() in generic manner with dma attributes which is used by mlx5 and mthca adapters. However in doing so it ignored honoring dma_ops extension of software based transports for sg map/unmap operation. This results in calling dma_map_sg_attrs of hardware virtual device resulting in crash for null reference. We extend the core to support sg_map/unmap_attrs and transport drivers to implement those dma_ops callback functions. Verified usign perftest applications. BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<ffffffff81032a75>] check_addr+0x35/0x60 ... Call Trace: [<ffffffff81032b39>] ? nommu_map_sg+0x99/0xd0 [<ffffffffa02b31c6>] ib_umem_get+0x3d6/0x470 [ib_core] [<ffffffffa01cc329>] rxe_mem_init_user+0x49/0x270 [rdma_rxe] [<ffffffffa01c793a>] ? rxe_add_index+0xca/0x100 [rdma_rxe] [<ffffffffa01c995f>] rxe_reg_user_mr+0x9f/0x130 [rdma_rxe] [<ffffffffa00419fe>] ib_uverbs_reg_mr+0x14e/0x2c0 [ib_uverbs] [<ffffffffa003d3ab>] ib_uverbs_write+0x15b/0x3b0 [ib_uverbs] [<ffffffff811e92a6>] ? mem_cgroup_commit_charge+0x76/0xe0 [<ffffffff811af0a9>] ? page_add_new_anon_rmap+0x89/0xc0 [<ffffffff8117e6c9>] ? lru_cache_add_active_or_unevictable+0x39/0xc0 [<ffffffff811f0da8>] __vfs_write+0x28/0x120 [<ffffffff811f1239>] ? rw_verify_area+0x49/0xb0 [<ffffffff811f1492>] vfs_write+0xb2/0x1b0 [<ffffffff811f27d6>] SyS_write+0x46/0xa0 [<ffffffff814f7d32>] entry_SYSCALL_64_fastpath+0x1a/0xa4 Signed-off-by:
Parav Pandit <pandit.parav@gmail.com> Signed-off-by:
Doug Ledford <dledford@redhat.com>
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Parav Pandit authored
Both prepare4 and prepare6 sets loopback mask in pkt_info structure instance of skb. The xmit_packet and other requester side functions use a pkt_info struct from the stack without the proper mask. This results in sending out the packet to the actual netdev device and loopback functionality is broken. Modify prepare() to pass its correctly marked pkt_info struct to prepare4() and prepare6() instead of them using SKB_TO_PKT(skb) and getting an incorrectly set mask. Verified with perftest applications. Signed-off-by:
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Parav Pandit authored
This patch avoids scheduing tasklet for WQE and protocol processing for user space QP. It performs the task in calling process context. To improve code readability kernel specific post_send handling moved to post_send_kernel() function. Signed-off-by:
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- 03 Oct, 2016 1 commit
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Parav Pandit authored
Corrected function name in comment from qib_ to rvt_. Signed-off-by:
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- 02 Oct, 2016 34 commits
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Mike Marciniszyn authored
The length is incorrect, causing the trace data to be truncated. Add the additional 8 bytes that should have been there. Also trace out the atomic ack in hex to aid debugging. Reviewed-by:
Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by:
Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by:
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Jianxin Xiong authored
Fix "unsupported method" error by skipping ingress pkey checks on response SMA packets. Reviewed-by:
Jianxin Xiong <jianxin.xiong@intel.com> Signed-off-by:
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Dean Luick authored
The driver will now try to read directly from the EPROM as its first choice for the platform configuration file. Reviewed-by:
Easwar Hariharan <easwar.hariharan@intel.com> Signed-off-by:
Dean Luick <dean.luick@intel.com> Signed-off-by:
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Dean Luick authored
Add a function to read the platform configuration file from the EPROM. Reviewed-by:
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Dean Luick authored
Partially revert commit d0790317 ("IB/hfi1: Remove EPROM functionality from data device"), bringing back the ability to read from the EPROM. This code will be used for driver-only acccess to the EPROM, hence change EPROM read to save to a buffer instead of copy touser. Also allow any offset and remove missed includes and leftover declarations. Reviewed-by:
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Tadeusz Struk authored
This patch adds description for the sdma engine related sysfs entries for the HFI1 driver. Reviewed-by:
Sebastian Sanchez <sebastian.sanchez@intel.com> Reviewed-by:
Tadeusz Struk <tadeusz.struk@intel.com> Signed-off-by:
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Tadeusz Struk authored
Add a debugfs sdma_cpu_list file that can be used to examine the CPU to sdma engine assignments for the whole device. Reviewed-by:
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Tadeusz Struk authored
This patch adds an irq affinity notification handler. When a user changes interrupt affinity settings for an sdma engine, the driver needs to make changes to its internal sde structures and also update the affinity_hint. Reviewed-by:
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Tadeusz Struk authored
This patch adds a read-only "VL" attribute for the sysfs entry of each sdma engine. It will allow the user to check VL to sdma engine mappings. Reviewed-by:
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Tadeusz Struk authored
Some users want more control over which cpu cores are being used by the driver. For example, users might want to restrict the driver to some specified subset of the cores so that they can appropriately partition processes, irq handlers, and work threads. To allow the user to fine tune system affinity settings new sysfs attributes are introduced per sdma engine. This patch adds a new attribute type for sdma engine and a new cpu_list attribute. When the user writes a cpu range to the cpu_list attribute the driver will create an internal cpu->sdma map, which will be used later as a look-up table to choose an optimal engine for a user requests. Reviewed-by:
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Jakub Pawlak authored
Correct resource free in allocate_ctxt() function. When context creation fails allocated resources are properly released and pointer in receive context data table is set back to NULL. Reviewed-by:
Jakub Pawlak <jakub.pawlak@intel.com> Signed-off-by:
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Dennis Dalessandro authored
We no longer use an error tasklet. Remove it from the hfi1_devdata structure. Reviewed-by:
Ira Weiny <ira.weiny@intel.com> Signed-off-by:
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Dennis Dalessandro authored
The code no longer uses tasklets for the send engine. However it does use a tasklet for sdma but the send routines use a workqueue now days. Update the comments to reflect that. Make things more generic with saying "send engine" because that is what is being referred to. Reviewed-by:
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Harish Chegondi authored
It was determined that 0x880 is a better value for hardware buffering, use it. Reviewed-by:
Harish Chegondi <harish.chegondi@intel.com> Signed-off-by:
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Dean Luick authored
Add missing external device timeout notification. Recognize it as a failed LNI signal from the 8051 firmware. Reviewed-by:
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Mike Marciniszyn authored
There is a a bug in defered ack stuff that causes a race with the destroy of a QP. A packet causes a defered ack to be pended by putting the QP into an rcd queue. A return from the driver interrupt processing will process that rcd queue of QPs and attempt to do a direct send of the ack. At this point no locks are held and the above QP could now be put in the reset state in the qp destroy logic. A refcount protects the QP while it is in the rcd queue so it isn't going anywhere yet. If the direct send fails to allocate a pio buffer, hfi1_schedule_send() is called to trigger sending an ack from the send engine. There is no state test in that code path. The refcount is then dropped from the driver.c caller potentially allowing the qp destroy to continue from its refcount wait in parallel with the workqueue scheduling of the qp. Cc: stable@vger.kernel.org Reviewed-by:
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Sebastian Sanchez authored
Prevent over-reading the SGE length by using byte reads for non quad-word reads. Reviewed-by:
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Sebastian Sanchez authored
In certain cases, if the tail of an SGE is not 8-byte aligned, bytes beyond the end to an 8-byte alignment can be read. Change the copy routine to avoid the over-read. Instead, stop on the final whole quad-word, then read the remaining bytes. Reviewed-by:
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Dean Luick authored
Allow a longer timeout for i2c due to clock stretching and inaccurate jiffy timing when under a spin lock. This timeout is consistent with other i2c-algo-bit users. Reviewed-by:
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Jianxin Xiong authored
The ib_write_bw test allows using up to 16384 QPs. When a relatively large number of QPs (within that range) is used, the test can fail because the number of CQ entries needed exceeds the limit set by the driver. This patch increases the default setting of max_cqes from 0x2FFFF (196607) to 0x2FFFFF(3145727), which is sufficient to cover the maximum number needed by the ib_write_bw test (2097152). The default setting of max_qps is also increased from 16384 to 32768 to allow the test to run successfully with 16383 or 16384 QPs. Reviewed-by:
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Sebastian Sanchez authored
The FM should have full control to set the pkeys in the driver pkey table. Remove filtering done by the driver. Reviewed-by:
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Dennis Dalessandro authored
There is no need to have a global qpt_mask as that does not support the multiple chip model which qib has. Instead rely on the value which exists already in the device data (dd). Fixes: 898fa52b "IB/qib: Remove qpn, qp tables and related variables from qib" Reviewed-by:
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Mike Marciniszyn authored
This allows for adding additional pages of adaptive pio opcode control including manufacturer specific ones. Reviewed-by:
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Mike Marciniszyn authored
This patch adds lockdep asserts in key code paths for insuring lock correctness. Reviewed-by:
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Mike Marciniszyn authored
Add an rvt_qp_init() to initialize specific common fields as the qp is created or reset. The routine is shared by the rvt_reset_qp() and the rvt_create_qp(). The intent is that lock dep assertions will only appear in the rvt_reset_qp(). Reviewed-by:
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Mike Marciniszyn authored
The reset calldown is misplaced. It should only be called in the code that actually transitions the QP to reset. Reviewed-by:
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Mike Marciniszyn authored
The call is misplaced in the reset calldown function and causes issues with lockdep assertions that are to be added. Fixes: Commit a2c2d608 ("staging/rdma/hfi1: Remove create_qp functionality") Reviewed-by:
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Mike Marciniszyn authored
The __must_hold() is sufficent to correct the sparse context imbalance inside a function. Per Documentation/sparse.txt: __must_hold - The specified lock is held on function entry and exit. Fixes: Commit c0a67f6b ("IB/rdmavt: Annotate rvt_reset_qp()") Reviewed-by:
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Tadeusz Struk authored
Existing locking scheme in affinity.c file using the &node_affinity.lock spinlock is not very elegant. We acquire the lock to get hfi1_affinity_node entry, unlock, and then use the entry without the lock held. With more functions being added, which access and modify the entries, this can lead to race conditions. This patch makes this locking scheme more consistent. It changes the spinlock to mutex. Since all the code is executed in a user process context there is no need for a spinlock. This also allows to keep the lock not only while we look up for the node affinity entry, but over the whole section where the entry is being used. Reviewed-by:
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Tymoteusz Kielan authored
The dma_XXX API functions return bus addresses which are physical addresses when IOMMU is disabled. Buffer mapping to user-space is done via remap_pfn_range() with PFN based on bus address instead of physical. This results in wrong pages being mapped to user-space when IOMMU is enabled. Reviewed-by:
Mitko Haralanov <mitko.haralanov@intel.com> Reviewed-by:
Tymoteusz Kielan <tymoteusz.kielan@intel.com> Signed-off-by:
Andrzej Kacprowski <andrzej.kacprowski@intel.com> Signed-off-by:
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Harish Chegondi authored
Each user SDMA request coming into the driver may contain multiple packets. Each user packet may use multiple SDMA descriptors to fill the send buffer. The field seqsubmitted in struct user_sdma_request counts the number of user packets submitted to an SDMA engine. Sometimes, the intermediate count may not be updated properly. However, once all the packets' descriptors are successfully submitted to the SDMA engine, the final count is updated correctly. But, if only some of the packets are submitted to the engine due to an error, the intermediate count doesn't reflect the partial number of packets submitted to the SDMA engine. This can cause a hang later in the code as the count of packets submitted to the SDMA engine doesn't match the the count of packets processed by the SDMA engine. Reviewed-by:
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Dean Luick authored
All calls to tune_serdes and start_link are paired. Move tune_serdes inside start_link. Reviewed-by:
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Mike Marciniszyn authored
Use common header file structs, defines, and accessors in the drivers. The old declarations are removed. The repositioning of the includes allows for the removal of hfi1_message_header and replaces its use with ib_header. Also corrected are two issues with set_armed_to_active(): - The "packet" parameter is now a pointer as it should have been - The etype is validated to insure that the header is correct Reviewed-by:
Don Hiatt <don.hiatt@intel.com> Signed-off-by:
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Mike Marciniszyn authored
Add IB headers, defines, and accessors that are identical in both qib and hfi1 into the core includes. The accessors for be maintenance of __be64 fields since alignment is potentially invalid and can differ based on the presense of the GRH. {hfi1,qib}_ib_headers will be ib_headers. {hfi1,qib|_other_headers will be ib_other_headers. Reviewed-by:
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- 16 Sep, 2016 2 commits
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Mike Marciniszyn authored
This improves readability and hides the reference count mechanism from the client drivers. Reviewed-by:
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Mike Marciniszyn authored
This centralizes the function and improves code readability. Reviewed-by:
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