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authorEmil Tantilov <emil.s.tantilov@intel.com>2011-04-20 08:49:06 (GMT)
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2011-05-04 19:17:33 (GMT)
commit68c7005d664724eab87627b042e149a736622d54 (patch)
treec2257af755eba410a8af9a88ae10c93b462e41d2 /kernel/nsproxy.c
parent95a46011843a3c49e1a002eddb6b2735c201e378 (diff)
downloadlinux-fsl-qoriq-68c7005d664724eab87627b042e149a736622d54.tar.xz
ixgbe: improve EEPROM read/write operations
Introduce buffered read/writes which greatly improves performance on parts with large EEPROMs. Previously reading/writing a word requires taking/releasing of synchronization semaphores which adds 10ms to each operation. The optimization is to read/write in buffers, but make sure the semaphore is not held for >500ms according to the datasheet. Since we can't read the EEPROM page size ixgbe_detect_eeprom_page_size() is used to discover the EEPROM size when needed and keeps the result in word_page_size for the rest of the run time. Use buffered reads for ethtool -e. Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com> Tested-by: Evan Swanson <evan.swanson@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'kernel/nsproxy.c')
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