| /******************************************************************************* |
| |
| Intel PRO/1000 Linux driver |
| Copyright(c) 1999 - 2010 Intel Corporation. |
| |
| This program is free software; you can redistribute it and/or modify it |
| under the terms and conditions of the GNU General Public License, |
| version 2, as published by the Free Software Foundation. |
| |
| This program is distributed in the hope it will be useful, but WITHOUT |
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| more details. |
| |
| You should have received a copy of the GNU General Public License along with |
| this program; if not, write to the Free Software Foundation, Inc., |
| 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| |
| The full GNU General Public License is included in this distribution in |
| the file called "COPYING". |
| |
| Contact Information: |
| Linux NICS <linux.nics@intel.com> |
| e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> |
| Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| |
| *******************************************************************************/ |
| |
| #include "e1000_api.h" |
| |
| /** |
| * e1000_calculate_checksum - Calculate checksum for buffer |
| * @buffer: pointer to EEPROM |
| * @length: size of EEPROM to calculate a checksum for |
| * |
| * Calculates the checksum for some buffer on a specified length. The |
| * checksum calculated is returned. |
| **/ |
| static u8 e1000_calculate_checksum(u8 *buffer, u32 length) |
| { |
| u32 i; |
| u8 sum = 0; |
| |
| DEBUGFUNC("e1000_calculate_checksum"); |
| |
| if (!buffer) |
| return 0; |
| |
| for (i = 0; i < length; i++) |
| sum += buffer[i]; |
| |
| return (u8) (0 - sum); |
| } |
| |
| /** |
| * e1000_mng_enable_host_if_generic - Checks host interface is enabled |
| * @hw: pointer to the HW structure |
| * |
| * Returns E1000_success upon success, else E1000_ERR_HOST_INTERFACE_COMMAND |
| * |
| * This function checks whether the HOST IF is enabled for command operation |
| * and also checks whether the previous command is completed. It busy waits |
| * in case of previous command is not completed. |
| **/ |
| s32 e1000_mng_enable_host_if_generic(struct e1000_hw *hw) |
| { |
| u32 hicr; |
| s32 ret_val = E1000_SUCCESS; |
| u8 i; |
| |
| DEBUGFUNC("e1000_mng_enable_host_if_generic"); |
| |
| if (!(hw->mac.arc_subsystem_valid)) { |
| DEBUGOUT("ARC subsystem not valid.\n"); |
| ret_val = -E1000_ERR_HOST_INTERFACE_COMMAND; |
| goto out; |
| } |
| |
| /* Check that the host interface is enabled. */ |
| hicr = E1000_READ_REG(hw, E1000_HICR); |
| if ((hicr & E1000_HICR_EN) == 0) { |
| DEBUGOUT("E1000_HOST_EN bit disabled.\n"); |
| ret_val = -E1000_ERR_HOST_INTERFACE_COMMAND; |
| goto out; |
| } |
| /* check the previous command is completed */ |
| for (i = 0; i < E1000_MNG_DHCP_COMMAND_TIMEOUT; i++) { |
| hicr = E1000_READ_REG(hw, E1000_HICR); |
| if (!(hicr & E1000_HICR_C)) |
| break; |
| msec_delay_irq(1); |
| } |
| |
| if (i == E1000_MNG_DHCP_COMMAND_TIMEOUT) { |
| DEBUGOUT("Previous command timeout failed .\n"); |
| ret_val = -E1000_ERR_HOST_INTERFACE_COMMAND; |
| goto out; |
| } |
| |
| out: |
| return ret_val; |
| } |
| |
| /** |
| * e1000_check_mng_mode_generic - Generic check management mode |
| * @hw: pointer to the HW structure |
| * |
| * Reads the firmware semaphore register and returns true (>0) if |
| * manageability is enabled, else false (0). |
| **/ |
| bool e1000_check_mng_mode_generic(struct e1000_hw *hw) |
| { |
| u32 fwsm = E1000_READ_REG(hw, E1000_FWSM); |
| |
| DEBUGFUNC("e1000_check_mng_mode_generic"); |
| |
| |
| return (fwsm & E1000_FWSM_MODE_MASK) == |
| (E1000_MNG_IAMT_MODE << E1000_FWSM_MODE_SHIFT); |
| } |
| |
| /** |
| * e1000_enable_tx_pkt_filtering_generic - Enable packet filtering on Tx |
| * @hw: pointer to the HW structure |
| * |
| * Enables packet filtering on transmit packets if manageability is enabled |
| * and host interface is enabled. |
| **/ |
| bool e1000_enable_tx_pkt_filtering_generic(struct e1000_hw *hw) |
| { |
| struct e1000_host_mng_dhcp_cookie *hdr = &hw->mng_cookie; |
| u32 *buffer = (u32 *)&hw->mng_cookie; |
| u32 offset; |
| s32 ret_val, hdr_csum, csum; |
| u8 i, len; |
| |
| DEBUGFUNC("e1000_enable_tx_pkt_filtering_generic"); |
| |
| hw->mac.tx_pkt_filtering = true; |
| |
| /* No manageability, no filtering */ |
| if (!hw->mac.ops.check_mng_mode(hw)) { |
| hw->mac.tx_pkt_filtering = false; |
| goto out; |
| } |
| |
| /* |
| * If we can't read from the host interface for whatever |
| * reason, disable filtering. |
| */ |
| ret_val = hw->mac.ops.mng_enable_host_if(hw); |
| if (ret_val != E1000_SUCCESS) { |
| hw->mac.tx_pkt_filtering = false; |
| goto out; |
| } |
| |
| /* Read in the header. Length and offset are in dwords. */ |
| len = E1000_MNG_DHCP_COOKIE_LENGTH >> 2; |
| offset = E1000_MNG_DHCP_COOKIE_OFFSET >> 2; |
| for (i = 0; i < len; i++) |
| *(buffer + i) = E1000_READ_REG_ARRAY_DWORD(hw, E1000_HOST_IF, |
| offset + i); |
| hdr_csum = hdr->checksum; |
| hdr->checksum = 0; |
| csum = e1000_calculate_checksum((u8 *)hdr, |
| E1000_MNG_DHCP_COOKIE_LENGTH); |
| /* |
| * If either the checksums or signature don't match, then |
| * the cookie area isn't considered valid, in which case we |
| * take the safe route of assuming Tx filtering is enabled. |
| */ |
| if ((hdr_csum != csum) || (hdr->signature != E1000_IAMT_SIGNATURE)) { |
| hw->mac.tx_pkt_filtering = true; |
| goto out; |
| } |
| |
| /* Cookie area is valid, make the final check for filtering. */ |
| if (!(hdr->status & E1000_MNG_DHCP_COOKIE_STATUS_PARSING)) { |
| hw->mac.tx_pkt_filtering = false; |
| goto out; |
| } |
| |
| out: |
| return hw->mac.tx_pkt_filtering; |
| } |
| |
| /** |
| * e1000_mng_write_dhcp_info_generic - Writes DHCP info to host interface |
| * @hw: pointer to the HW structure |
| * @buffer: pointer to the host interface |
| * @length: size of the buffer |
| * |
| * Writes the DHCP information to the host interface. |
| **/ |
| s32 e1000_mng_write_dhcp_info_generic(struct e1000_hw *hw, u8 *buffer, |
| u16 length) |
| { |
| struct e1000_host_mng_command_header hdr; |
| s32 ret_val; |
| u32 hicr; |
| |
| DEBUGFUNC("e1000_mng_write_dhcp_info_generic"); |
| |
| hdr.command_id = E1000_MNG_DHCP_TX_PAYLOAD_CMD; |
| hdr.command_length = length; |
| hdr.reserved1 = 0; |
| hdr.reserved2 = 0; |
| hdr.checksum = 0; |
| |
| /* Enable the host interface */ |
| ret_val = hw->mac.ops.mng_enable_host_if(hw); |
| if (ret_val) |
| goto out; |
| |
| /* Populate the host interface with the contents of "buffer". */ |
| ret_val = hw->mac.ops.mng_host_if_write(hw, buffer, length, |
| sizeof(hdr), &(hdr.checksum)); |
| if (ret_val) |
| goto out; |
| |
| /* Write the manageability command header */ |
| ret_val = hw->mac.ops.mng_write_cmd_header(hw, &hdr); |
| if (ret_val) |
| goto out; |
| |
| /* Tell the ARC a new command is pending. */ |
| hicr = E1000_READ_REG(hw, E1000_HICR); |
| E1000_WRITE_REG(hw, E1000_HICR, hicr | E1000_HICR_C); |
| |
| out: |
| return ret_val; |
| } |
| |
| /** |
| * e1000_mng_write_cmd_header_generic - Writes manageability command header |
| * @hw: pointer to the HW structure |
| * @hdr: pointer to the host interface command header |
| * |
| * Writes the command header after does the checksum calculation. |
| **/ |
| s32 e1000_mng_write_cmd_header_generic(struct e1000_hw *hw, |
| struct e1000_host_mng_command_header *hdr) |
| { |
| u16 i, length = sizeof(struct e1000_host_mng_command_header); |
| |
| DEBUGFUNC("e1000_mng_write_cmd_header_generic"); |
| |
| /* Write the whole command header structure with new checksum. */ |
| |
| hdr->checksum = e1000_calculate_checksum((u8 *)hdr, length); |
| |
| length >>= 2; |
| /* Write the relevant command block into the ram area. */ |
| for (i = 0; i < length; i++) { |
| E1000_WRITE_REG_ARRAY_DWORD(hw, E1000_HOST_IF, i, |
| *((u32 *) hdr + i)); |
| E1000_WRITE_FLUSH(hw); |
| } |
| |
| return E1000_SUCCESS; |
| } |
| |
| /** |
| * e1000_mng_host_if_write_generic - Write to the manageability host interface |
| * @hw: pointer to the HW structure |
| * @buffer: pointer to the host interface buffer |
| * @length: size of the buffer |
| * @offset: location in the buffer to write to |
| * @sum: sum of the data (not checksum) |
| * |
| * This function writes the buffer content at the offset given on the host if. |
| * It also does alignment considerations to do the writes in most efficient |
| * way. Also fills up the sum of the buffer in *buffer parameter. |
| **/ |
| s32 e1000_mng_host_if_write_generic(struct e1000_hw *hw, u8 *buffer, |
| u16 length, u16 offset, u8 *sum) |
| { |
| u8 *tmp; |
| u8 *bufptr = buffer; |
| u32 data = 0; |
| s32 ret_val = E1000_SUCCESS; |
| u16 remaining, i, j, prev_bytes; |
| |
| DEBUGFUNC("e1000_mng_host_if_write_generic"); |
| |
| /* sum = only sum of the data and it is not checksum */ |
| |
| if (length == 0 || offset + length > E1000_HI_MAX_MNG_DATA_LENGTH) { |
| ret_val = -E1000_ERR_PARAM; |
| goto out; |
| } |
| |
| tmp = (u8 *)&data; |
| prev_bytes = offset & 0x3; |
| offset >>= 2; |
| |
| if (prev_bytes) { |
| data = E1000_READ_REG_ARRAY_DWORD(hw, E1000_HOST_IF, offset); |
| for (j = prev_bytes; j < sizeof(u32); j++) { |
| *(tmp + j) = *bufptr++; |
| *sum += *(tmp + j); |
| } |
| E1000_WRITE_REG_ARRAY_DWORD(hw, E1000_HOST_IF, offset, data); |
| length -= j - prev_bytes; |
| offset++; |
| } |
| |
| remaining = length & 0x3; |
| length -= remaining; |
| |
| /* Calculate length in DWORDs */ |
| length >>= 2; |
| |
| /* |
| * The device driver writes the relevant command block into the |
| * ram area. |
| */ |
| for (i = 0; i < length; i++) { |
| for (j = 0; j < sizeof(u32); j++) { |
| *(tmp + j) = *bufptr++; |
| *sum += *(tmp + j); |
| } |
| |
| E1000_WRITE_REG_ARRAY_DWORD(hw, E1000_HOST_IF, offset + i, |
| data); |
| } |
| if (remaining) { |
| for (j = 0; j < sizeof(u32); j++) { |
| if (j < remaining) |
| *(tmp + j) = *bufptr++; |
| else |
| *(tmp + j) = 0; |
| |
| *sum += *(tmp + j); |
| } |
| E1000_WRITE_REG_ARRAY_DWORD(hw, E1000_HOST_IF, offset + i, data); |
| } |
| |
| out: |
| return ret_val; |
| } |
| |
| /** |
| * e1000_enable_mng_pass_thru - Check if management passthrough is needed |
| * @hw: pointer to the HW structure |
| * |
| * Verifies the hardware needs to leave interface enabled so that frames can |
| * be directed to and from the management interface. |
| **/ |
| bool e1000_enable_mng_pass_thru(struct e1000_hw *hw) |
| { |
| u32 manc; |
| u32 fwsm, factps; |
| bool ret_val = false; |
| |
| DEBUGFUNC("e1000_enable_mng_pass_thru"); |
| |
| if (!hw->mac.asf_firmware_present) |
| goto out; |
| |
| manc = E1000_READ_REG(hw, E1000_MANC); |
| |
| if (!(manc & E1000_MANC_RCV_TCO_EN)) |
| goto out; |
| |
| if (hw->mac.has_fwsm) { |
| fwsm = E1000_READ_REG(hw, E1000_FWSM); |
| factps = E1000_READ_REG(hw, E1000_FACTPS); |
| |
| if (!(factps & E1000_FACTPS_MNGCG) && |
| ((fwsm & E1000_FWSM_MODE_MASK) == |
| (e1000_mng_mode_pt << E1000_FWSM_MODE_SHIFT))) { |
| ret_val = true; |
| goto out; |
| } |
| } else if ((manc & E1000_MANC_SMBUS_EN) && |
| !(manc & E1000_MANC_ASF_EN)) { |
| ret_val = true; |
| goto out; |
| } |
| |
| out: |
| return ret_val; |
| } |
| |
