Joerg Roedel
2e34bde185
dma-debug: add checks for kernel text and rodata
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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>
2009-03-17 12:56:48 +01:00
David Woodhouse
6c132d1bcd
dma-debug: print stacktrace of mapping path on unmap error
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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>
2009-03-17 12:56:48 +01:00
David Woodhouse
ac26c18bd3
dma-debug: add function to dump dma mappings
...
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>
2009-03-17 12:56:39 +01:00
Joerg Roedel
a31fba5d68
dma-debug: add checks for sync_single_sg_*
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Impact: add debug callbacks for dma_sync_sg_* functions
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-03-05 20:35:21 +01:00
Joerg Roedel
948408ba3e
dma-debug: add checks for sync_single_range_*
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Impact: add debug callbacks for dma_sync_single_range_for_* functions
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-03-05 20:35:21 +01:00
Joerg Roedel
b9d2317e0c
dma-debug: add checks for sync_single_*
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Impact: add debug callbacks for dma_sync_single_for_* functions
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-03-05 20:35:20 +01:00
Joerg Roedel
6bfd449876
dma-debug: add checking for [alloc|free]_coherent
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Impact: add debug callbacks for dma_[alloc|free]_coherent
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-03-05 20:35:19 +01:00
Joerg Roedel
972aa45cea
dma-debug: add add checking for map/unmap_sg
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Impact: add debug callbacks for dma_{un}map_sg
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-03-05 20:35:18 +01:00
Joerg Roedel
f62bc980e6
dma-debug: add checking for map/unmap_page/single
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Impact: add debug callbacks for dma_{un}map_[page|single]
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-03-05 20:35:18 +01:00
Joerg Roedel
2d62ece14f
dma-debug: add core checking functions
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Impact: add functions to check on dma unmap and sync
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-03-05 20:35:17 +01:00
Joerg Roedel
788dcfa6f1
dma-debug: add debugfs interface
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Impact: add debugfs interface for configuring DMA-API debugging
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-03-05 20:35:16 +01:00
Joerg Roedel
59d3daafa1
dma-debug: add kernel command line parameters
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Impact: add dma_debug= and dma_debug_entries= kernel parameters
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-03-05 20:35:16 +01:00
Joerg Roedel
6bf078715c
dma-debug: add initialization code
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Impact: add code to initialize dma-debug core data structures
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-03-05 20:35:15 +01:00
Joerg Roedel
3b1e79ed73
dma-debug: add allocator code
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Impact: add allocator code for struct dma_debug_entry
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-03-05 20:35:15 +01:00
Joerg Roedel
30dfa90cc8
dma-debug: add hash functions for dma_debug_entries
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Impact: implement necessary functions for the core hash
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-03-05 20:35:04 +01:00
Joerg Roedel
f2f45e5f3c
dma-debug: add header file and core data structures
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Impact: add groundwork for DMA-API debugging
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-03-05 15:11:12 +01:00
