diff options
Diffstat (limited to 'drivers/net/ethernet/intel/igb/e1000_i210.c')
| -rw-r--r-- | drivers/net/ethernet/intel/igb/e1000_i210.c | 156 |
1 files changed, 114 insertions, 42 deletions
diff --git a/drivers/net/ethernet/intel/igb/e1000_i210.c b/drivers/net/ethernet/intel/igb/e1000_i210.c index 6a42344f24f1..ddb3cf51b9b9 100644 --- a/drivers/net/ethernet/intel/igb/e1000_i210.c +++ b/drivers/net/ethernet/intel/igb/e1000_i210.c @@ -44,10 +44,42 @@ static s32 igb_get_hw_semaphore_i210(struct e1000_hw *hw) { u32 swsm; - s32 ret_val = E1000_SUCCESS; s32 timeout = hw->nvm.word_size + 1; s32 i = 0; + /* Get the SW semaphore */ + while (i < timeout) { + swsm = rd32(E1000_SWSM); + if (!(swsm & E1000_SWSM_SMBI)) + break; + + udelay(50); + i++; + } + + if (i == timeout) { + /* In rare circumstances, the SW semaphore may already be held + * unintentionally. Clear the semaphore once before giving up. + */ + if (hw->dev_spec._82575.clear_semaphore_once) { + hw->dev_spec._82575.clear_semaphore_once = false; + igb_put_hw_semaphore(hw); + for (i = 0; i < timeout; i++) { + swsm = rd32(E1000_SWSM); + if (!(swsm & E1000_SWSM_SMBI)) + break; + + udelay(50); + } + } + + /* If we do not have the semaphore here, we have to give up. */ + if (i == timeout) { + hw_dbg("Driver can't access device - SMBI bit is set.\n"); + return -E1000_ERR_NVM; + } + } + /* Get the FW semaphore. */ for (i = 0; i < timeout; i++) { swsm = rd32(E1000_SWSM); @@ -64,12 +96,10 @@ static s32 igb_get_hw_semaphore_i210(struct e1000_hw *hw) /* Release semaphores */ igb_put_hw_semaphore(hw); hw_dbg("Driver can't access the NVM\n"); - ret_val = -E1000_ERR_NVM; - goto out; + return -E1000_ERR_NVM; } -out: - return ret_val; + return E1000_SUCCESS; } /** @@ -99,23 +129,6 @@ void igb_release_nvm_i210(struct e1000_hw *hw) } /** - * igb_put_hw_semaphore_i210 - Release hardware semaphore - * @hw: pointer to the HW structure - * - * Release hardware semaphore used to access the PHY or NVM - */ -static void igb_put_hw_semaphore_i210(struct e1000_hw *hw) -{ - u32 swsm; - - swsm = rd32(E1000_SWSM); - - swsm &= ~E1000_SWSM_SWESMBI; - - wr32(E1000_SWSM, swsm); -} - -/** * igb_acquire_swfw_sync_i210 - Acquire SW/FW semaphore * @hw: pointer to the HW structure * @mask: specifies which semaphore to acquire @@ -138,13 +151,11 @@ s32 igb_acquire_swfw_sync_i210(struct e1000_hw *hw, u16 mask) } swfw_sync = rd32(E1000_SW_FW_SYNC); - if (!(swfw_sync & fwmask)) + if (!(swfw_sync & (fwmask | swmask))) break; - /* - * Firmware currently using resource (fwmask) - */ - igb_put_hw_semaphore_i210(hw); + /* Firmware currently using resource (fwmask) */ + igb_put_hw_semaphore(hw); mdelay(5); i++; } @@ -158,7 +169,7 @@ s32 igb_acquire_swfw_sync_i210(struct e1000_hw *hw, u16 mask) swfw_sync |= swmask; wr32(E1000_SW_FW_SYNC, swfw_sync); - igb_put_hw_semaphore_i210(hw); + igb_put_hw_semaphore(hw); out: return ret_val; } @@ -182,7 +193,7 @@ void igb_release_swfw_sync_i210(struct e1000_hw *hw, u16 mask) swfw_sync &= ~mask; wr32(E1000_SW_FW_SYNC, swfw_sync); - igb_put_hw_semaphore_i210(hw); + igb_put_hw_semaphore(hw); } /** @@ -203,7 +214,8 @@ s32 igb_read_nvm_srrd_i210(struct e1000_hw *hw, u16 offset, u16 words, /* We cannot hold synchronization semaphores for too long, * because of forceful takeover procedure. However it is more efficient - * to read in bursts than synchronizing access for each word. */ + * to read in bursts than synchronizing access for each word. + */ for (i = 0; i < words; i += E1000_EERD_EEWR_MAX_COUNT) { count = (words - i) / E1000_EERD_EEWR_MAX_COUNT > 0 ? E1000_EERD_EEWR_MAX_COUNT : (words - i); @@ -242,8 +254,7 @@ static s32 igb_write_nvm_srwr(struct e1000_hw *hw, u16 offset, u16 words, u32 attempts = 100000; s32 ret_val = E1000_SUCCESS; - /* - * A check for invalid values: offset too large, too many words, + /* A check for invalid values: offset too large, too many words, * too many words for the offset, and not enough words. */ if ((offset >= nvm->word_size) || (words > (nvm->word_size - offset)) || @@ -294,7 +305,7 @@ out: * * If error code is returned, data and Shadow RAM may be inconsistent - buffer * partially written. - */ + **/ s32 igb_write_nvm_srwr_i210(struct e1000_hw *hw, u16 offset, u16 words, u16 *data) { @@ -326,7 +337,7 @@ s32 igb_write_nvm_srwr_i210(struct e1000_hw *hw, u16 offset, u16 words, /** * igb_read_nvm_i211 - Read NVM wrapper function for I211 * @hw: pointer to the HW structure - * @address: the word address (aka eeprom offset) to read + * @words: number of words to read * @data: pointer to the data read * * Wrapper function to return data formerly found in the NVM. @@ -549,8 +560,7 @@ s32 igb_validate_nvm_checksum_i210(struct e1000_hw *hw) if (hw->nvm.ops.acquire(hw) == E1000_SUCCESS) { - /* - * Replace the read function with semaphore grabbing with + /* Replace the read function with semaphore grabbing with * the one that skips this for a while. * We have semaphore taken already here. */ @@ -570,7 +580,6 @@ s32 igb_validate_nvm_checksum_i210(struct e1000_hw *hw) return status; } - /** * igb_update_nvm_checksum_i210 - Update EEPROM checksum * @hw: pointer to the HW structure @@ -585,8 +594,7 @@ s32 igb_update_nvm_checksum_i210(struct e1000_hw *hw) u16 checksum = 0; u16 i, nvm_data; - /* - * Read the first word from the EEPROM. If this times out or fails, do + /* Read the first word from the EEPROM. If this times out or fails, do * not continue or we could be in for a very long wait while every * EEPROM read fails */ @@ -597,8 +605,7 @@ s32 igb_update_nvm_checksum_i210(struct e1000_hw *hw) } if (hw->nvm.ops.acquire(hw) == E1000_SUCCESS) { - /* - * Do not use hw->nvm.ops.write, hw->nvm.ops.read + /* Do not use hw->nvm.ops.write, hw->nvm.ops.read * because we do not want to take the synchronization * semaphores twice here. */ @@ -635,7 +642,7 @@ out: * igb_pool_flash_update_done_i210 - Pool FLUDONE status. * @hw: pointer to the HW structure * - */ + **/ static s32 igb_pool_flash_update_done_i210(struct e1000_hw *hw) { s32 ret_val = -E1000_ERR_NVM; @@ -714,3 +721,68 @@ s32 igb_valid_led_default_i210(struct e1000_hw *hw, u16 *data) out: return ret_val; } + +/** + * __igb_access_xmdio_reg - Read/write XMDIO register + * @hw: pointer to the HW structure + * @address: XMDIO address to program + * @dev_addr: device address to program + * @data: pointer to value to read/write from/to the XMDIO address + * @read: boolean flag to indicate read or write + **/ +static s32 __igb_access_xmdio_reg(struct e1000_hw *hw, u16 address, + u8 dev_addr, u16 *data, bool read) +{ + s32 ret_val = E1000_SUCCESS; + + ret_val = hw->phy.ops.write_reg(hw, E1000_MMDAC, dev_addr); + if (ret_val) + return ret_val; + + ret_val = hw->phy.ops.write_reg(hw, E1000_MMDAAD, address); + if (ret_val) + return ret_val; + + ret_val = hw->phy.ops.write_reg(hw, E1000_MMDAC, E1000_MMDAC_FUNC_DATA | + dev_addr); + if (ret_val) + return ret_val; + + if (read) + ret_val = hw->phy.ops.read_reg(hw, E1000_MMDAAD, data); + else + ret_val = hw->phy.ops.write_reg(hw, E1000_MMDAAD, *data); + if (ret_val) + return ret_val; + + /* Recalibrate the device back to 0 */ + ret_val = hw->phy.ops.write_reg(hw, E1000_MMDAC, 0); + if (ret_val) + return ret_val; + + return ret_val; +} + +/** + * igb_read_xmdio_reg - Read XMDIO register + * @hw: pointer to the HW structure + * @addr: XMDIO address to program + * @dev_addr: device address to program + * @data: value to be read from the EMI address + **/ +s32 igb_read_xmdio_reg(struct e1000_hw *hw, u16 addr, u8 dev_addr, u16 *data) +{ + return __igb_access_xmdio_reg(hw, addr, dev_addr, data, true); +} + +/** + * igb_write_xmdio_reg - Write XMDIO register + * @hw: pointer to the HW structure + * @addr: XMDIO address to program + * @dev_addr: device address to program + * @data: value to be written to the XMDIO address + **/ +s32 igb_write_xmdio_reg(struct e1000_hw *hw, u16 addr, u8 dev_addr, u16 data) +{ + return __igb_access_xmdio_reg(hw, addr, dev_addr, &data, false); +} |