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* dma-debug: make memory range checks more consistentJoerg Roedel2009-03-241-5/+8
| | | | | | | | | | | | | | | | Impact: extend on-kernel-stack DMA debug checks to all !highmem pages We only checked dma_map_single() - extend it to dma_map_page() and dma_map_sg() as well. Also, fix dma_map_single() corner case bug: make sure we dont stack-check highmem (not mapped) pages. Reported-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org LKML-Reference: <1237818908-26516-1-git-send-email-joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* dma-debug: warn of unmapping an invalid dma addressFUJITA Tomonori2009-03-191-1/+4
| | | | | | | | | | | | Impact: extend DMA-debug checks Calling dma_unmap families against an invalid dma address should be a bug. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Joerg Roedel <joerg.roedel@amd.com> LKML-Reference: <20090319103743N.fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* dma-debug: add a check dma memory leaksJoerg Roedel2009-03-171-0/+55
| | | | | | | | | Impact: allow architectures to monitor busses for dma mem leakage This patch adds checking code to detect if a device has pending DMA operations when it is about to be unbound from its device driver. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* dma-debug: add checks for kernel text and rodataJoerg Roedel2009-03-171-1/+25
| | | | | | | | | Impact: get notified if a device dma maps illegal areas This patch adds a check to print a warning message when a device driver tries to map a memory area from the kernel text segment or rodata. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* dma-debug: print stacktrace of mapping path on unmap errorDavid Woodhouse2009-03-171-14/+38
| | | | | | | Impact: saves stacktrace of a dma mapping and prints it if there is an error Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* dma-debug: add function to dump dma mappingsDavid Woodhouse2009-03-171-0/+30
| | | | | | | | | | | | This adds a function to dump the DMA mappings that the debugging code is aware of -- either for a single device, or for _all_ devices. This can be useful for debugging -- sticking a call to it in the DMA page fault handler, for example, to see if the faulting address _should_ be mapped or not, and hence work out whether it's IOMMU bugs we're seeing, or driver bugs. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* dma-debug: add checks for sync_single_sg_*Joerg Roedel2009-03-051-0/+32
| | | | | | Impact: add debug callbacks for dma_sync_sg_* functions Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* dma-debug: add checks for sync_single_range_*Joerg Roedel2009-03-051-0/+24
| | | | | | Impact: add debug callbacks for dma_sync_single_range_for_* functions Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* dma-debug: add checks for sync_single_*Joerg Roedel2009-03-051-0/+21
| | | | | | Impact: add debug callbacks for dma_sync_single_for_* functions Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* dma-debug: add checking for [alloc|free]_coherentJoerg Roedel2009-03-051-0/+45
| | | | | | Impact: add debug callbacks for dma_[alloc|free]_coherent Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* dma-debug: add add checking for map/unmap_sgJoerg Roedel2009-03-051-0/+73
| | | | | | Impact: add debug callbacks for dma_{un}map_sg Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* dma-debug: add checking for map/unmap_page/singleJoerg Roedel2009-03-051-0/+53
| | | | | | Impact: add debug callbacks for dma_{un}map_[page|single] Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* dma-debug: add core checking functionsJoerg Roedel2009-03-051-1/+187
| | | | | | Impact: add functions to check on dma unmap and sync Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* dma-debug: add debugfs interfaceJoerg Roedel2009-03-051-0/+78
| | | | | | Impact: add debugfs interface for configuring DMA-API debugging Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* dma-debug: add kernel command line parametersJoerg Roedel2009-03-051-0/+38
| | | | | | Impact: add dma_debug= and dma_debug_entries= kernel parameters Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* dma-debug: add initialization codeJoerg Roedel2009-03-051-0/+66
| | | | | | Impact: add code to initialize dma-debug core data structures Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* dma-debug: add allocator codeJoerg Roedel2009-03-051-0/+57
| | | | | | Impact: add allocator code for struct dma_debug_entry Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* dma-debug: add hash functions for dma_debug_entriesJoerg Roedel2009-03-051-0/+101
| | | | | | Impact: implement necessary functions for the core hash Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* dma-debug: add header file and core data structuresJoerg Roedel2009-03-051-0/+42
Impact: add groundwork for DMA-API debugging Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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