diff options
Diffstat (limited to 'drivers/net/ixgbe/ixgbe_common.c')
| -rw-r--r-- | drivers/net/ixgbe/ixgbe_common.c | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/drivers/net/ixgbe/ixgbe_common.c b/drivers/net/ixgbe/ixgbe_common.c index 5ae93989784f..26ee8a04646e 100644 --- a/drivers/net/ixgbe/ixgbe_common.c +++ b/drivers/net/ixgbe/ixgbe_common.c @@ -29,6 +29,7 @@ #include <linux/delay.h> #include <linux/sched.h> +#include "ixgbe.h" #include "ixgbe_common.h" #include "ixgbe_phy.h" @@ -251,6 +252,81 @@ s32 ixgbe_get_mac_addr_generic(struct ixgbe_hw *hw, u8 *mac_addr) } /** + * ixgbe_get_bus_info_generic - Generic set PCI bus info + * @hw: pointer to hardware structure + * + * Sets the PCI bus info (speed, width, type) within the ixgbe_hw structure + **/ +s32 ixgbe_get_bus_info_generic(struct ixgbe_hw *hw) +{ + struct ixgbe_adapter *adapter = hw->back; + struct ixgbe_mac_info *mac = &hw->mac; + u16 link_status; + + hw->bus.type = ixgbe_bus_type_pci_express; + + /* Get the negotiated link width and speed from PCI config space */ + pci_read_config_word(adapter->pdev, IXGBE_PCI_LINK_STATUS, + &link_status); + + switch (link_status & IXGBE_PCI_LINK_WIDTH) { + case IXGBE_PCI_LINK_WIDTH_1: + hw->bus.width = ixgbe_bus_width_pcie_x1; + break; + case IXGBE_PCI_LINK_WIDTH_2: + hw->bus.width = ixgbe_bus_width_pcie_x2; + break; + case IXGBE_PCI_LINK_WIDTH_4: + hw->bus.width = ixgbe_bus_width_pcie_x4; + break; + case IXGBE_PCI_LINK_WIDTH_8: + hw->bus.width = ixgbe_bus_width_pcie_x8; + break; + default: + hw->bus.width = ixgbe_bus_width_unknown; + break; + } + + switch (link_status & IXGBE_PCI_LINK_SPEED) { + case IXGBE_PCI_LINK_SPEED_2500: + hw->bus.speed = ixgbe_bus_speed_2500; + break; + case IXGBE_PCI_LINK_SPEED_5000: + hw->bus.speed = ixgbe_bus_speed_5000; + break; + default: + hw->bus.speed = ixgbe_bus_speed_unknown; + break; + } + + mac->ops.set_lan_id(hw); + + return 0; +} + +/** + * ixgbe_set_lan_id_multi_port_pcie - Set LAN id for PCIe multiple port devices + * @hw: pointer to the HW structure + * + * Determines the LAN function id by reading memory-mapped registers + * and swaps the port value if requested. + **/ +void ixgbe_set_lan_id_multi_port_pcie(struct ixgbe_hw *hw) +{ + struct ixgbe_bus_info *bus = &hw->bus; + u32 reg; + + reg = IXGBE_READ_REG(hw, IXGBE_STATUS); + bus->func = (reg & IXGBE_STATUS_LAN_ID) >> IXGBE_STATUS_LAN_ID_SHIFT; + bus->lan_id = bus->func; + + /* check for a port swap */ + reg = IXGBE_READ_REG(hw, IXGBE_FACTPS); + if (reg & IXGBE_FACTPS_LFS) + bus->func ^= 0x1; +} + +/** * ixgbe_stop_adapter_generic - Generic stop Tx/Rx units * @hw: pointer to hardware structure * @@ -390,6 +466,73 @@ s32 ixgbe_init_eeprom_params_generic(struct ixgbe_hw *hw) } /** + * ixgbe_write_eeprom_generic - Writes 16 bit value to EEPROM + * @hw: pointer to hardware structure + * @offset: offset within the EEPROM to be written to + * @data: 16 bit word to be written to the EEPROM + * + * If ixgbe_eeprom_update_checksum is not called after this function, the + * EEPROM will most likely contain an invalid checksum. + **/ +s32 ixgbe_write_eeprom_generic(struct ixgbe_hw *hw, u16 offset, u16 data) +{ + s32 status; + u8 write_opcode = IXGBE_EEPROM_WRITE_OPCODE_SPI; + + hw->eeprom.ops.init_params(hw); + + if (offset >= hw->eeprom.word_size) { + status = IXGBE_ERR_EEPROM; + goto out; + } + + /* Prepare the EEPROM for writing */ + status = ixgbe_acquire_eeprom(hw); + + if (status == 0) { + if (ixgbe_ready_eeprom(hw) != 0) { + ixgbe_release_eeprom(hw); + status = IXGBE_ERR_EEPROM; + } + } + + if (status == 0) { + ixgbe_standby_eeprom(hw); + + /* Send the WRITE ENABLE command (8 bit opcode ) */ + ixgbe_shift_out_eeprom_bits(hw, IXGBE_EEPROM_WREN_OPCODE_SPI, + IXGBE_EEPROM_OPCODE_BITS); + + ixgbe_standby_eeprom(hw); + + /* + * Some SPI eeproms use the 8th address bit embedded in the + * opcode + */ + if ((hw->eeprom.address_bits == 8) && (offset >= 128)) + write_opcode |= IXGBE_EEPROM_A8_OPCODE_SPI; + + /* Send the Write command (8-bit opcode + addr) */ + ixgbe_shift_out_eeprom_bits(hw, write_opcode, + IXGBE_EEPROM_OPCODE_BITS); + ixgbe_shift_out_eeprom_bits(hw, (u16)(offset*2), + hw->eeprom.address_bits); + + /* Send the data */ + data = (data >> 8) | (data << 8); + ixgbe_shift_out_eeprom_bits(hw, data, 16); + ixgbe_standby_eeprom(hw); + + msleep(hw->eeprom.semaphore_delay); + /* Done with writing - release the EEPROM */ + ixgbe_release_eeprom(hw); + } + +out: + return status; +} + +/** * ixgbe_read_eeprom_bit_bang_generic - Read EEPROM word using bit-bang * @hw: pointer to hardware structure * @offset: offset within the EEPROM to be read @@ -1487,6 +1630,101 @@ s32 ixgbe_disable_mc_generic(struct ixgbe_hw *hw) } /** + * ixgbe_fc_enable - Enable flow control + * @hw: pointer to hardware structure + * @packetbuf_num: packet buffer number (0-7) + * + * Enable flow control according to the current settings. + **/ +s32 ixgbe_fc_enable(struct ixgbe_hw *hw, s32 packetbuf_num) +{ + s32 ret_val = 0; + u32 mflcn_reg; + u32 fccfg_reg; + u32 reg; + + mflcn_reg = IXGBE_READ_REG(hw, IXGBE_MFLCN); + mflcn_reg &= ~(IXGBE_MFLCN_RFCE | IXGBE_MFLCN_RPFCE); + + fccfg_reg = IXGBE_READ_REG(hw, IXGBE_FCCFG); + fccfg_reg &= ~(IXGBE_FCCFG_TFCE_802_3X | IXGBE_FCCFG_TFCE_PRIORITY); + + /* + * The possible values of fc.current_mode are: + * 0: Flow control is completely disabled + * 1: Rx flow control is enabled (we can receive pause frames, + * but not send pause frames). + * 2: Tx flow control is enabled (we can send pause frames but + * we do not support receiving pause frames). + * 3: Both Rx and Tx flow control (symmetric) are enabled. + * other: Invalid. + */ + switch (hw->fc.current_mode) { + case ixgbe_fc_none: + /* Flow control completely disabled by software override. */ + break; + case ixgbe_fc_rx_pause: + /* + * Rx Flow control is enabled and Tx Flow control is + * disabled by software override. Since there really + * isn't a way to advertise that we are capable of RX + * Pause ONLY, we will advertise that we support both + * symmetric and asymmetric Rx PAUSE. Later, we will + * disable the adapter's ability to send PAUSE frames. + */ + mflcn_reg |= IXGBE_MFLCN_RFCE; + break; + case ixgbe_fc_tx_pause: + /* + * Tx Flow control is enabled, and Rx Flow control is + * disabled by software override. + */ + fccfg_reg |= IXGBE_FCCFG_TFCE_802_3X; + break; + case ixgbe_fc_full: + /* Flow control (both Rx and Tx) is enabled by SW override. */ + mflcn_reg |= IXGBE_MFLCN_RFCE; + fccfg_reg |= IXGBE_FCCFG_TFCE_802_3X; + break; + default: + hw_dbg(hw, "Flow control param set incorrectly\n"); + ret_val = -IXGBE_ERR_CONFIG; + goto out; + break; + } + + /* Enable 802.3x based flow control settings. */ + IXGBE_WRITE_REG(hw, IXGBE_MFLCN, mflcn_reg); + IXGBE_WRITE_REG(hw, IXGBE_FCCFG, fccfg_reg); + + /* Set up and enable Rx high/low water mark thresholds, enable XON. */ + if (hw->fc.current_mode & ixgbe_fc_tx_pause) { + if (hw->fc.send_xon) + IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(packetbuf_num), + (hw->fc.low_water | IXGBE_FCRTL_XONE)); + else + IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(packetbuf_num), + hw->fc.low_water); + + IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(packetbuf_num), + (hw->fc.high_water | IXGBE_FCRTH_FCEN)); + } + + /* Configure pause time (2 TCs per register) */ + reg = IXGBE_READ_REG(hw, IXGBE_FCTTV(packetbuf_num)); + if ((packetbuf_num & 1) == 0) + reg = (reg & 0xFFFF0000) | hw->fc.pause_time; + else + reg = (reg & 0x0000FFFF) | (hw->fc.pause_time << 16); + IXGBE_WRITE_REG(hw, IXGBE_FCTTV(packetbuf_num / 2), reg); + + IXGBE_WRITE_REG(hw, IXGBE_FCRTV, (hw->fc.pause_time >> 1)); + +out: + return ret_val; +} + +/** * ixgbe_fc_autoneg - Configure flow control * @hw: pointer to hardware structure * @@ -1625,6 +1863,74 @@ out: } /** + * ixgbe_setup_fc_generic - Set up flow control + * @hw: pointer to hardware structure + * + * Sets up flow control. + **/ +s32 ixgbe_setup_fc_generic(struct ixgbe_hw *hw, s32 packetbuf_num) +{ + s32 ret_val = 0; + ixgbe_link_speed speed; + bool link_up; + + /* Validate the packetbuf configuration */ + if (packetbuf_num < 0 || packetbuf_num > 7) { + hw_dbg(hw, "Invalid packet buffer number [%d], expected range " + "is 0-7\n", packetbuf_num); + ret_val = IXGBE_ERR_INVALID_LINK_SETTINGS; + goto out; + } + + /* + * Validate the water mark configuration. Zero water marks are invalid + * because it causes the controller to just blast out fc packets. + */ + if (!hw->fc.low_water || !hw->fc.high_water || !hw->fc.pause_time) { + hw_dbg(hw, "Invalid water mark configuration\n"); + ret_val = IXGBE_ERR_INVALID_LINK_SETTINGS; + goto out; + } + + /* + * Validate the requested mode. Strict IEEE mode does not allow + * ixgbe_fc_rx_pause because it will cause testing anomalies. + */ + if (hw->fc.strict_ieee && hw->fc.requested_mode == ixgbe_fc_rx_pause) { + hw_dbg(hw, "ixgbe_fc_rx_pause not valid in strict " + "IEEE mode\n"); + ret_val = IXGBE_ERR_INVALID_LINK_SETTINGS; + goto out; + } + + /* + * 10gig parts do not have a word in the EEPROM to determine the + * default flow control setting, so we explicitly set it to full. + */ + if (hw->fc.requested_mode == ixgbe_fc_default) + hw->fc.requested_mode = ixgbe_fc_full; + + /* + * Save off the requested flow control mode for use later. Depending + * on the link partner's capabilities, we may or may not use this mode. + */ + hw->fc.current_mode = hw->fc.requested_mode; + + /* Decide whether to use autoneg or not. */ + hw->mac.ops.check_link(hw, &speed, &link_up, false); + if (hw->phy.multispeed_fiber && (speed == IXGBE_LINK_SPEED_1GB_FULL)) + ret_val = ixgbe_fc_autoneg(hw); + + if (ret_val) + goto out; + + ret_val = ixgbe_fc_enable(hw, packetbuf_num); + +out: + return ret_val; +} + +/** * ixgbe_disable_pcie_master - Disable PCI-express master access * @hw: pointer to hardware structure * @@ -1732,3 +2038,16 @@ void ixgbe_release_swfw_sync(struct ixgbe_hw *hw, u16 mask) ixgbe_release_eeprom_semaphore(hw); } +/** + * ixgbe_enable_rx_dma_generic - Enable the Rx DMA unit + * @hw: pointer to hardware structure + * @regval: register value to write to RXCTRL + * + * Enables the Rx DMA unit + **/ +s32 ixgbe_enable_rx_dma_generic(struct ixgbe_hw *hw, u32 regval) +{ + IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, regval); + + return 0; +} |