- 16 Dec, 2009 40 commits
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Akinobu Mita authored
Signed-off-by:
Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Akinobu Mita authored
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Akinobu Mita authored
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"David S. Miller" <davem@davemloft.net> Signed-off-by:
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Akinobu Mita authored
Signed-off-by:
Roland Dreier <rolandd@cisco.com> Cc: Yevgeny Petrilin <yevgenyp@mellanox.co.il> Signed-off-by:
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Akinobu Mita authored
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Akinobu Mita authored
Use bitmap library and kill some unused iommu helper functions. 1. s/iommu_area_free/bitmap_clear/ 2. s/iommu_area_reserve/bitmap_set/ 3. Use bitmap_find_next_zero_area instead of find_next_zero_area This cannot be simple substitution because find_next_zero_area doesn't check the last bit of the limit in bitmap 4. Remove iommu_area_free, iommu_area_reserve, and find_next_zero_area Signed-off-by:
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Akinobu Mita authored
This introduces new bitmap functions: bitmap_set: Set specified bit area bitmap_clear: Clear specified bit area bitmap_find_next_zero_area: Find free bit area These are mostly stolen from iommu helper. The differences are: - Use find_next_bit instead of doing test_bit for each bit - Rewrite bitmap_set and bitmap_clear Instead of setting or clearing for each bit. - Check the last bit of the limit iommu-helper doesn't want to find such area - The return value if there is no zero area find_next_zero_area in iommu helper: returns -1 bitmap_find_next_zero_area: return >= bitmap size Signed-off-by:
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Akinobu Mita authored
Use hweight8 instead of counting for each bit Signed-off-by:
Anders Larsen <al@alarsen.net> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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Anders Larsen authored
commit 945ffe54 ("qnx4: remove write support") removed the (defunct) write support but missed a chunk of related, dead code. Signed-off-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
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Jean Delvare authored
resource_size() doesn't change the resource it operates on, so the res parameter can be marked const. Same for resource_type(). Signed-off-by:
Jean Delvare <khali@linux-fr.org> Reviewed-by:
WANG Cong <xiyou.wangcong@gmail.com> Cc: Greg KH <greg@kroah.com> Signed-off-by:
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Jack Steiner authored
GRU Message queue instructions are used to deliver messages to other SSIs within the numalink domain. In most cases, a single GRU mesq instruction will deliver both the message AND an interrupt to notify the other SSI that a messsage is present. In some cases, however, the interrupt must be sent explicitly. To improve resilency, the GRU driver should send these explicit interrupts using the GRU to write the remote chipset register. Current code sends the interrupt using a cpu instruction to write the chipset register. Signed-off-by:
Jack Steiner <steiner@sgi.com> Signed-off-by:
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Jack Steiner authored
Create a function to generate the value that is written to the UV hub MMR to cause an IPI interrupt to be sent. The function will be used in the GRU message queue error recovery code that sends IPIs to nodes in remote partitions. Signed-off-by:
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Jack Steiner authored
Update the version number of the GRU driver. Signed-off-by:
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Jack Steiner authored
Update the TLB dropin statistics kept for each GRU context. Count TLB dropins separate from the misses - some misses do not result in a TLB dropin. Some of the diagnostics need both counts. Signed-off-by:
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Jack Steiner authored
Fix a race where an interrupt could be received for a GRU context that has been deallocated. Signed-off-by:
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Jack Steiner authored
Add support for hugepages. Easier than I originally thought. Signed-off-by:
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Jack Steiner authored
Fix a bug in the assignment of GRU contexts used for kernel functions. If a sleep occurs on the wait for a semaphore, the thread could switch cpus and allocate resources on the wrong blade. Signed-off-by:
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Jack Steiner authored
Add a few new definitions for chipset MMR field names. This matches rev 0.7 of the hardware spec. Signed-off-by:
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Jack Steiner authored
Simplify the code that checks for correct assignment of GRU contexts to users. Signed-off-by:
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Jack Steiner authored
Remove a stray local_irq_enable() in the GRU TLB dropin code. Signed-off-by:
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Jack Steiner authored
Use symbol names instead of numbers for error return values for the vtop functions. Signed-off-by:
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Jack Steiner authored
Fix a GRU driver bug converting a CBR address to the context that contains the CBR. The conversion is rarely done so performance does not matter. Signed-off-by:
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Jack Steiner authored
Add anticipatory TLB dropins for GRU TLB misses that occur on BCOPY instructions that copy large amounts of data. Signed-off-by:
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Jack Steiner authored
Explicitly set GRU instructions to "ACTIVE". This eliminates the need for barriers that would have been necessary to prevent reading the instruction "status" field before the GRU had actually started the instruction. Signed-off-by:
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Jack Steiner authored
Add additional GRU statistics & debug messages. Signed-off-by:
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Jack Steiner authored
Update the GRU irq allocate/free functions to use the latest upstream infrastructure. Signed-off-by:
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Jack Steiner authored
Fix several bugs related to prefetch, ordering & speculation: - GRU cch_allocate() instruction causes cacheable memory to be created. Add a barriers to prevent speculation from prefetching data before it exists. - Add memory barriers before cache-flush instructions to ensure that previously stored data is included in the line flushed to memory. Signed-off-by:
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Jack Steiner authored
Fix bug caused by failure to allocate a GRU gts structure. The old code failed to handle the case where the vma was invalid. Signed-off-by:
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Jack Steiner authored
Improve existing driver self-tests. Add a new debugging test to the SGI GRU driver for verifying the global GRU copy function. Signed-off-by:
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Jack Steiner authored
Add a debug option to the SGI GRU driver for flushing GRU cache lines from memory. In theory this is not needed but it is useful for debugging. This has no use by end users. Signed-off-by:
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Jack Steiner authored
Under some conditions, mmu_notifier_register() will fail to register a mmu_notifier. Fix the GRU driver to correctly handle these failures. Signed-off-by:
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Jack Steiner authored
Increase the maximum address supported by the SGI GRU driver to a full 64 bits. Note that GRU addresses are not always the same as socket virtual addresses. Sockets may not necessarily support the full 64 bits. Signed-off-by:
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Jack Steiner authored
Improve error messages for malfunctioning GRUs. Identify the type of instruction that is failing. Signed-off-by:
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Jack Steiner authored
Fix bug in module unload. Previous code was not correctly deleting the files in /proc. Signed-off-by:
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Jack Steiner authored
This patch builds on the infrastructure introduced in the patches that allow user specification of GRU blades & chiplets for context allocation. This patch simplifies the algorithms for migrating GRU contexts between blades. No new functionality is introduced. Signed-off-by:
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Jack Steiner authored
Add support to the GRU driver to allow users to specify the blade & chiplet for allocation of GRU contexts. Add new statistics for context loading/unloading/retargeting. Also deleted a few GRU stats that were no longer being unused. Signed-off-by:
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Jack Steiner authored
Add table & user request infrastructure that is needed to allow users to specify the blade and chiplet for allocation of GRU contexts. Use of this information is in a subsequent patch. Signed-off-by:
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Jack Steiner authored
Do not use alloc_pages_exact_node() to allocate GRU tables. If a blade has no local memory, nid will be -1. Use alloc_pages_node() instead. Signed-off-by:
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Jack Steiner authored
TLB dropins require updates to the CBR instruction istatus field. This is needed to resolve race conditions in the chip. The code currently uses the user address of the CBR. This works but opens up additional endcases related to stealing of contexts and accessing the CBR from tasks that do not have access to the user address space. (Some of this non-user task access is debug code that is not currently being pushed to the community). User CBRs are also directly accessible using the kernel mapping of the CBR. Change the TLB dropin code to use the the kernel mapping of the CBR. Signed-off-by:
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Jack Steiner authored
Add comments from previous code reviews. The comments help explain some of the more esoteric aspects of the driver. Move a free() to the other side of an unlock. Signed-off-by:
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