- 03 Aug, 2016 33 commits
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Dean Luick authored
The original code used a LRU list to evict nodes which were least recently used. For correctness the evict code was moved under the handler->lock, now add back the LRU list. Reviewed-by:
Ira Weiny <ira.weiny@intel.com> Signed-off-by:
Dean Luick <dean.luick@intel.com> Signed-off-by:
Doug Ledford <dledford@redhat.com>
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Ira Weiny authored
During an unexpected shutdown, references to tid_rb_node were NULL'ed out without properly being released. Fix this by calling clear_tid_node in the mmu notifier remove callback rather than after these callbacks are called. Reviewed-by:
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Dean Luick authored
The reworked mmu_rb interface allows the unused mm argument to be removed. Reviewed-by:
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Dean Luick authored
The ops->remove() callback was called by hfi1_mmu_unregister() with a NULL mm argument while holding a spinlock. In the case of sdma_rb_remove() this caused it to pass current->mm to hfi1_release_user_pages() This had 2 problems. First this would attempt to acquire the mmap_sem under a spin lock. Second the use of current->mm is not always guaranteed to be the proper mm when the fd is being closed. Rather than depend on this implicit behavior we move all calls to ops->remove outside of the spinlock. This also allows the correct mm to be used in the remove callback without fear of deadlock. Because the MMU notifier is not guaranteed to hold mm->mmap_sem, but usually does, we must delay all remove callbacks until out of the notifier, when the callbacks can take the mmap_sem if they need to. Code comments were added to clarify what the expectations are for the users of the mmu rb tree. Suggested-by:
Jim Foraker <foraker1@llnl.gov> Reviewed-by:
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Dean Luick authored
Use the new cache evict operation in the SDMA code. This allows the cache to properly coordinate evicts and removes, preventing any race. With this change, the separate list, lock, and race flag are not needed. Reviewed-by:
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Dean Luick authored
Allow users to clear nodes from the rb tree based on their evict callback. Reviewed-by:
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Dean Luick authored
Per file descriptor TID caching actions depend on a global that can change midway through the lifetime of that file descriptor. Make the use of caching consistent for the life of the file descriptor by using the presence of the cache handler to decide when to use the cache functions. Reviewed-by:
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Dean Luick authored
The objects which use cache handling should reference their own handler object not the internal data structure it uses to track the nodes. Have the "users" of the mmu notifier code pass opaque objects which can then be properly used in the mmu callbacks depending on the owners needs. This patch has the additional benefit that operations no longer require a look up in a list to find the handlers. Reviewed-by:
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Ira Weiny authored
The hfi1 driver registers a mmu_notifier callback when /dev/hfi1_* is opened, and unregisters it when the device is closed. The driver incorrectly assumes that the close will always happen from the same context as the open. In particular, closes due to SIGKILL or OOM killer activity may happen from a different context. In these cases, the wrong mm is passed to mmu_notifier_unregister(), which causes improper reference counting for the victim mm, and eventual memory corruption. Preserve the mm for all open file descriptors and use this mm rather than current->mm for memory operations for the lifetime of that fd. Note: this patch leaves 1 use of current->mm in place. This use is removed in a follow on patch because other functional changes were required prior to that use being removed. If registration fails, there is no reason to keep the handler object around. Free the handler object rather than add it to the list to prevent any mmu_notifier operations, including unregister, when registration fails. Suggested-by:
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Dean Luick authored
The user SDMA in-use claim bit is in the structure that gets zeroed out once the claim is made. Move the request in-use flag into its own bit array and use that for atomic claims. This cleans up the claim code and removes any race possibility. Reviewed-by:
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Dean Luick authored
If input validation fails, properly free the request before returning. Reviewed-by:
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Dean Luick authored
If unable to insert node into the RB tree cache, node will be freed before returning from the function. Null out iovec's pointer to node so iovec does not try to free it later. Reviewed-by:
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Dean Luick authored
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Dean Luick authored
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Dean Luick authored
Save the current capability state at user context creation time. Report this saved value for all shared contexts. Also get rid of unnecessary hfi1_get_base_kinfo function. Reviewed-by:
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Ira Weiny authored
If a context has not been assigned or assignment failed, pq may be NULL. Move the unregister within the protection of the null check. Reviewed-by:
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Dean Luick authored
Clarify the names of the TID mmu functions. Reviewed-by:
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Dean Luick authored
Checking if the rb tree is empty is redundant with the while loop which is emptying the rb tree. Reviewed-by:
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Ira Weiny authored
Rearrange the file open call in prep for new changes. Reviewed-by:
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Dean Luick authored
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Ira Weiny authored
For bool parameters "false" should be used Reviewed-by:
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Ira Weiny authored
subctxt is not used, just remove it. Reviewed-by:
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Ira Weiny authored
__mmu_rb_remove was called in only 1 place which was a very simple call site. Combine this function into its caller. Reviewed-by:
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Dean Luick authored
Remove, insert, and invalidate are always provided. No need to test. Reviewed-by:
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Ira Weiny authored
This makes it more clear what these functions are operating on. Reviewed-by:
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Ira Weiny authored
Parameter names to function declarations make it more clear what those parameters do. Reviewed-by:
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Dean Luick authored
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Dean Luick authored
These are no longer needed. Reviewed-by:
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Ira Weiny authored
Brackets should be on the next line of a function Reviewed-by:
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Ira Weiny authored
Expand the serial number space by using more bits from the GUID. Reviewed-by:
Jubin John <jubin.john@intel.com> Signed-off-by:
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Ira Weiny authored
The driver pads non-double word multiple message sizes but it doesn't account for this padding when the packet length is calculated. Also, the data length is miscalculated for message sizes less than 4 bytes due to the bit representation in LRH. And there's a check for non-double word multiple message sizes that prevents these messages from being sent. This patch fixes length miscalculations and enables the functionality to send non-double word multiple message sizes. Reviewed-by:
Harish Chegondi <harish.chegondi@intel.com> Signed-off-by:
Sebastian Sanchez <sebastian.sanchez@intel.com> Signed-off-by:
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Ira Weiny authored
The use of the specific opcode test is redundant since all ack entry users correctly manipulate the mr pointer to selectively trigger the reference clearing. The overly specific test hinders the use of implementation specific operations. The change needs to get rid of the union to insure that an atomic value is not seen as an MR pointer. Reviewed-by:
Ashutosh Dixit <ashutosh.dixit@intel.com> Signed-off-by:
Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by:
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Ira Weiny authored
Checking the return value of the memory allocation call in init_pervl_scs() was missed. Recently the kmalloc() was changed to kzalloc() which identified the problem. While fixing this issue 2 other bugs were noticed. First, the array being allocated is accessed in the nomem path which can be reached before it is allocated. Second, kernel_send_context was not released on error. Fix both of these by creating a more common memory unwind label structure. Fixes: 35f6befc ("staging/rdma/hfi1: Add qp to send context mapping for PIO") Reported-by:
Leon Romanovsky <leon@kernel.org> Reviewed-by:
Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by:
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- 02 Aug, 2016 7 commits
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Dasaratharaman Chandramouli authored
Instead of copying the actual GRH of type struct ib_grh, existing code copies the struct ib_global_route into the sge. This patch fixes that and constructs the actual GRH from ib_global_route and copies the GRH into the sge. Reviewed-by:
Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com> Signed-off-by:
Don Hiatt <don.hiatt@intel.com> Signed-off-by:
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Dasaratharaman Chandramouli authored
The interface is used to compute the 5-bit SC field from the LRH and the RHF bits. Modify code to use the interface instead. Reviewed-by:
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Dasaratharaman Chandramouli authored
Cleanup hfi1_ud_rcv to not have to look at the packet header fields multiple times. The fields are looked up once and used throughout the function. Also fix sc computation when validating MAD packets. Reviewed-by:
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Don Hiatt authored
hfi1_pio_header should really be called hfi1_sdma_header as it is only used for sdma transmits. Reviewed-by:
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Dasaratharaman Chandramouli authored
struct ahg_ib_header has no header specific information. Rename it to struct hfi1_ahg_info Reviewed-by:
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Dasaratharaman Chandramouli authored
sde and hfi1_ib_header are not used anymore. Reviewed-by:
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Easwar Hariharan authored
Active QSFP cables were reset only every alternate iteration of the channel tuning algorithm instead of every iteration due to incorrect reset of the flag that controlled QSFP reset, resulting in using stale QSFP status in the channel tuning algorithm. Fixes: 8ebd4cf1 ("Add active and optical cable support") Reviewed-by:
Easwar Hariharan <easwar.hariharan@intel.com> Signed-off-by:
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