From 68c7005d664724eab87627b042e149a736622d54 Mon Sep 17 00:00:00 2001 From: Emil Tantilov Date: Wed, 20 Apr 2011 08:49:06 +0000 Subject: 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 Tested-by: Evan Swanson Signed-off-by: Jeff Kirsher --- drivers/net/ixgbe/ixgbe_common.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/net/ixgbe/ixgbe_common.h') diff --git a/drivers/net/ixgbe/ixgbe_common.h b/drivers/net/ixgbe/ixgbe_common.h index e850adbb32a1..46be83cfb500 100644 --- a/drivers/net/ixgbe/ixgbe_common.h +++ b/drivers/net/ixgbe/ixgbe_common.h @@ -49,10 +49,18 @@ s32 ixgbe_led_off_generic(struct ixgbe_hw *hw, u32 index); s32 ixgbe_init_eeprom_params_generic(struct ixgbe_hw *hw); s32 ixgbe_write_eeprom_generic(struct ixgbe_hw *hw, u16 offset, u16 data); +s32 ixgbe_write_eeprom_buffer_bit_bang_generic(struct ixgbe_hw *hw, u16 offset, + u16 words, u16 *data); s32 ixgbe_read_eerd_generic(struct ixgbe_hw *hw, u16 offset, u16 *data); +s32 ixgbe_read_eerd_buffer_generic(struct ixgbe_hw *hw, u16 offset, + u16 words, u16 *data); s32 ixgbe_write_eewr_generic(struct ixgbe_hw *hw, u16 offset, u16 data); +s32 ixgbe_write_eewr_buffer_generic(struct ixgbe_hw *hw, u16 offset, + u16 words, u16 *data); s32 ixgbe_read_eeprom_bit_bang_generic(struct ixgbe_hw *hw, u16 offset, u16 *data); +s32 ixgbe_read_eeprom_buffer_bit_bang_generic(struct ixgbe_hw *hw, u16 offset, + u16 words, u16 *data); u16 ixgbe_calc_eeprom_checksum_generic(struct ixgbe_hw *hw); s32 ixgbe_validate_eeprom_checksum_generic(struct ixgbe_hw *hw, u16 *checksum_val); -- cgit v1.2.3