- 05 Mar, 2005 40 commits
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Arjan van de Ven authored
The patch below replaces the existing 8Kb randomisation of the userspace stack pointer (which is currently only done for Hyperthreaded P-IVs) with a more general randomisation over a 64Kb range. 64Kb is not a lot, but it's a start and once the dust settles we can increase this value to a more agressive value. Signed-off-by:
Arjan van de Ven <arjan@infradead.org> Signed-off-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Arjan van de Ven authored
Even though there is a global flag to disable randomisation, it's useful to have a per process flag too; the patch below introduces this per process flag and automatically sets it for "new" binaries. Eventually we will want to tie this to the legacy-va-space personality Signed-off-by:
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Arjan van de Ven authored
The patch below introduces get_random_int() and randomize_range(), two helpers used in later patches in the series. get_random_int() shares the tcp/ip random number stuff so the CONFIG_INET ifdef needs to move slightly, and to reduce the damange due to that, secure_ip_id() needs to move inside random.c From: Frank Sorenson <frank@tuxrocks.com> Acked-By:
Jeff Dike <jdike@addtoit.com> The stack randomization patches that went into 2.6.11-rc3-mm1 broke compilation of ARCH=um. This patch fixes compiling by adding arch_align_stack back in. Signed-off-by:
Frank Sorenson <frank@tuxrocks.com> Signed-off-by:
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Arjan van de Ven authored
This first patch of the series introduces a sysctl (default off) that enables/disables the randomisation feature globally. Since randomisation may make it harder to debug really tricky situations (reproducability goes down), the sysadmin needs a way to disable it globally. Signed-off-by:
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Kumar Gala authored
Static initialization of spin locks that are otherwise accessed prior to initialization. Signed-off-by:
Jaka Mocnik <jaka@activetools.si> Signed-off-by:
Kumar Gala <kumar.gala@freescale.com> Signed-off-by:
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Sean Hefty authored
Modify ib_cancel_mad() to invoke a user's send completion callback from a different thread context than that used by the caller. This allows a caller to hold a lock while calling cancel that is also acquired from their send handler. Signed-off-by:
Sean Hefty <sean.hefty@intel.com> Signed-off-by:
Roland Dreier <roland@topspin.com> Signed-off-by:
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Michael S. Tsirkin authored
Set device_cap_flags field in mthca's query_device method. Signed-off-by:
Michael S. Tsirkin <mst@mellanox.co.il> Signed-off-by:
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Michael S. Tsirkin authored
1. Split the QP spinlock into separate send and receive locks. The only place where we have to lock both is upon modify_qp, and that is not on data path. 2. Avoid taking any QP locks when polling CQ. This last part is achieved by getting rid of the cur field in mthca_wq, and calculating the number of outstanding WQEs by comparing the head and tail fields. head is only updated by post, tail is only updated by poll. In a rare case where an overrun is detected, a CQ is locked and the overrun condition is re-tested, to avoid any potential for stale tail values. Signed-off-by:
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Roland Dreier authored
Tie up one last loose end by mapping enough context memory to cover the whole multicast table during initialization, and then enable mem-free mode. mthca now supports enough of mem-free mode so that IPoIB works with a mem-free HCA. Signed-off-by:
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Roland Dreier authored
Implement posting send and receive work requests for mem-free mode. Also tidy up a few things in send/receive posting for Tavor mode (fix smp_wmb()s that should really be just wmb()s, annotate tests in the fast path with likely()/unlikely()). Signed-off-by:
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Roland Dreier authored
Update address vector handling to support mem-free mode. In mem-free mode, the address vector (in hardware format) is copied by the driver into each send work queue entry, so our address handle creation can become pretty trivial: we just kmalloc() a buffer to hold the formatted address vector. Signed-off-by:
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Roland Dreier authored
Update QP initialization and cleanup to handle mem-free mode. In mem-free mode, work queue sizes have to be rounded up to a power of 2, we need to allocate doorbells, there must be memory mapped for the entries in the QP and extended QP context table that we use, and the entries of the receive queue must be initialized. Signed-off-by:
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Roland Dreier authored
Add support for CQ data path operations (request notification, update consumer index) in mem-free mode. Signed-off-by:
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Roland Dreier authored
Update CQ initialization and cleanup to handle mem-free mode: we need to make sure the HCA has memory mapped for the entry in the CQ context table we will use and also allocate doorbell records. Signed-off-by:
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Roland Dreier authored
Factor the allocation and freeing of completion queue buffers into mthca_alloc_cq_buf() and mthca_free_cq_buf(). This makes the code more readable and will eventually make handling userspace CQs simpler (the kernel doesn't have to allocate a buffer at all). Signed-off-by:
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Roland Dreier authored
Add a mthca_write_db_rec() to wrap writing doorbell records. On 64-bit archs, this is just a 64-bit write, while on 32-bit archs it splits the write into two 32-bit writes with a memory barrier to make sure the two halves of the record are written in the correct order. Signed-off-by:
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Roland Dreier authored
Mem-free mode requires the driver to allocate additional doorbell pages for each user access region. Add support for this in mthca_memfree.c, and have the driver allocate a table in db_tab for kernel use. Signed-off-by:
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Roland Dreier authored
Have MAP_ICM_page() firmware command map assume pages are always the HCA-native 4K size rather than using the kernel's page size. This will make handling doorbell pages for mem-free mode simpler. Signed-off-by:
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Roland Dreier authored
Slightly improve debugging output for UNMAP_ICM and MODIFY_QP firmware commands. Signed-off-by:
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Roland Dreier authored
Update interrupt handling code to handle mem-free mode. While we're at it, improve the Tavor interrupt handling to avoid an extra MMIO read of the event cause register. Signed-off-by:
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Roland Dreier authored
Add code to initialize EQ context properly in both Tavor and mem-free mode. Signed-off-by:
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Roland Dreier authored
Add support for mem-free mode to memory region code. This mostly amounts to properly munging between keys and indices. Signed-off-by:
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Roland Dreier authored
Add support for mapping more memory into HCA's context to cover context tables when new objects are allocated. Pass the object size into mthca_alloc_icm_table(), reference count the ICM chunks, and add new mthca_table_get() and mthca_table_put() functions to handle mapping memory when allocating or destroying objects. Signed-off-by:
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Roland Dreier authored
Add support for allocating user access regions (UARs). Use this to allocate a region for kernel at driver init instead using hard-coded MTHCA_KAR_PAGE index. Signed-off-by:
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Roland Dreier authored
Move the request/ioremap of regions related to event handling into mthca_eq.c. Map the correct regions depending on whether we're in Tavor or native mem-free mode. Signed-off-by:
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Michael S. Tsirkin authored
Remove support for unsignaled receive requests. This is a non-standard extension to the IB spec that is not used by any known applications or protocols, and is not supported by newer hardware. Signed-off-by:
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Roland Dreier authored
Simplify some of the code for CQ handling slightly. Signed-off-by:
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Michael S. Tsirkin authored
Locking during the poll cq operation can be reduced by locking the cq while qp is being removed from the qp array. This also avoids an extra atomic operation for reference counting. Signed-off-by:
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Michael S. Tsirkin authored
Avoid taking the CQ table lock in the fast path path by using synchronize_irq() after removing a CQ from the table to make sure that no completion events are still in progress. This gets a nice speedup (about 4%) in IP over IB on my hardware. Signed-off-by:
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Michael S. Tsirkin authored
Clean up CQ code so that we only calculate the address of a CQ entry once when using it. Signed-off-by:
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Sean Hefty authored
Fix ib_find_cached_gid() to return the correct port number relative to the port numbering used by the device. Signed-off-by:
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Roland Dreier authored
Fix up locking for IPoIB path table. Make sure that destruction of address handles, neighbour info and path structs is locked properly to avoid races and deadlocks. (Problem originally diagnosed by Shirley Ma) Signed-off-by:
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Shirley Ma authored
ipoib_put_ah() may call ipoib_free_ah(), which might take the device's lock. Therefore we need to make sure we don't call ipoib_put_ah() when holding the lock already. Signed-off-by:
Shirley Ma <xma@us.ibm.com> Signed-off-by:
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Shirley Ma authored
IPoIB small fixes: Initialize path->ah to NULL, and fix dereference after free of neigh in error path of neigh_add_path(). Signed-off-by:
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Roland Dreier authored
Make IPoIB data_debug_level module parameter static to the single file where it is used. Also Rename IPoIB module parameter variable from "debug_level" to "ipoib_debug_level". This avoids possible name clashes if IPoIB is built into the kernel. We use module_param_named so that the user-visible parameter names remain the same. Signed-off-by:
Tom Duffy <tduffy@sun.com> Signed-off-by:
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Shirley Ma authored
Change uses of list_for_each_entry() where the loop variable is freed inside the loop to list_for_each_entry_safe(). Signed-off-by:
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Roland Dreier authored
Fix memory leak when posting a receive buffer (pointed out by Shirley Ma). Signed-off-by:
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Roland Dreier authored
MTHCA_RESET_VALUE must always be swapped, since the HCA expects to see it in big-endian order and we write it with writel. This means on little-endian systems we have to swap it to big-endian order before writing, and on big-endian systems we need to swap it to make up for the additional swap that writel will do. This fixes resetting the HCA on big-endian machines. Signed-off-by:
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Roland Dreier authored
Add missing break statements in switch in mthca_profile.c (pointed out by Michael Tsirkin). Signed-off-by:
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Tom Duffy authored
Fix some sparse warnings by making sure we have appropriate "extern" declarations visible. Signed-off-by:
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