| /* Intel Ethernet Switch Host Interface Driver |
| * Copyright(c) 2013 - 2015 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. |
| * |
| * The full GNU General Public License is included in this distribution in |
| * the file called "COPYING". |
| * |
| * Contact Information: |
| * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> |
| * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| */ |
| |
| #ifndef _FM10K_MBX_H_ |
| #define _FM10K_MBX_H_ |
| |
| /* forward declaration */ |
| struct fm10k_mbx_info; |
| |
| #include "fm10k_type.h" |
| #include "fm10k_tlv.h" |
| |
| /* PF Mailbox Registers */ |
| #define FM10K_MBMEM(_n) ((_n) + 0x18000) |
| #define FM10K_MBMEM_VF(_n, _m) (((_n) * 0x10) + (_m) + 0x18000) |
| #define FM10K_MBMEM_SM(_n) ((_n) + 0x18400) |
| #define FM10K_MBMEM_PF(_n) ((_n) + 0x18600) |
| /* XOR provides means of switching from Tx to Rx FIFO */ |
| #define FM10K_MBMEM_PF_XOR (FM10K_MBMEM_SM(0) ^ FM10K_MBMEM_PF(0)) |
| #define FM10K_MBX(_n) ((_n) + 0x18800) |
| #define FM10K_MBX_REQ 0x00000002 |
| #define FM10K_MBX_ACK 0x00000004 |
| #define FM10K_MBX_REQ_INTERRUPT 0x00000008 |
| #define FM10K_MBX_ACK_INTERRUPT 0x00000010 |
| #define FM10K_MBX_INTERRUPT_ENABLE 0x00000020 |
| #define FM10K_MBX_INTERRUPT_DISABLE 0x00000040 |
| #define FM10K_MBICR(_n) ((_n) + 0x18840) |
| #define FM10K_GMBX 0x18842 |
| |
| /* VF Mailbox Registers */ |
| #define FM10K_VFMBX 0x00010 |
| #define FM10K_VFMBMEM(_n) ((_n) + 0x00020) |
| #define FM10K_VFMBMEM_LEN 16 |
| #define FM10K_VFMBMEM_VF_XOR (FM10K_VFMBMEM_LEN / 2) |
| |
| /* Delays/timeouts */ |
| #define FM10K_MBX_DISCONNECT_TIMEOUT 500 |
| #define FM10K_MBX_POLL_DELAY 19 |
| #define FM10K_MBX_INT_DELAY 20 |
| |
| /* PF/VF Mailbox state machine |
| * |
| * +----------+ connect() +----------+ |
| * | CLOSED | --------------> | CONNECT | |
| * +----------+ +----------+ |
| * ^ ^ | |
| * | rcv: rcv: | | rcv: |
| * | Connect Disconnect | | Connect |
| * | Disconnect Error | | Data |
| * | | | |
| * | | V |
| * +----------+ disconnect() +----------+ |
| * |DISCONNECT| <-------------- | OPEN | |
| * +----------+ +----------+ |
| * |
| * The diagram above describes the PF/VF mailbox state machine. There |
| * are four main states to this machine. |
| * Closed: This state represents a mailbox that is in a standby state |
| * with interrupts disabled. In this state the mailbox should not |
| * read the mailbox or write any data. The only means of exiting |
| * this state is for the system to make the connect() call for the |
| * mailbox, it will then transition to the connect state. |
| * Connect: In this state the mailbox is seeking a connection. It will |
| * post a connect message with no specified destination and will |
| * wait for a reply from the other side of the mailbox. This state |
| * is exited when either a connect with the local mailbox as the |
| * destination is received or when a data message is received with |
| * a valid sequence number. |
| * Open: In this state the mailbox is able to transfer data between the local |
| * entity and the remote. It will fall back to connect in the event of |
| * receiving either an error message, or a disconnect message. It will |
| * transition to disconnect on a call to disconnect(); |
| * Disconnect: In this state the mailbox is attempting to gracefully terminate |
| * the connection. It will do so at the first point where it knows |
| * that the remote endpoint is either done sending, or when the |
| * remote endpoint has fallen back into connect. |
| */ |
| enum fm10k_mbx_state { |
| FM10K_STATE_CLOSED, |
| FM10K_STATE_CONNECT, |
| FM10K_STATE_OPEN, |
| FM10K_STATE_DISCONNECT, |
| }; |
| |
| /* PF/VF Mailbox header format |
| * 3 2 1 0 |
| * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * | Size/Err_no/CRC | Rsvd0 | Head | Tail | Type | |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * |
| * The layout above describes the format for the header used in the PF/VF |
| * mailbox. The header is broken out into the following fields: |
| * Type: There are 4 supported message types |
| * 0x8: Data header - used to transport message data |
| * 0xC: Connect header - used to establish connection |
| * 0xD: Disconnect header - used to tear down a connection |
| * 0xE: Error header - used to address message exceptions |
| * Tail: Tail index for local FIFO |
| * Tail index actually consists of two parts. The MSB of |
| * the head is a loop tracker, it is 0 on an even numbered |
| * loop through the FIFO, and 1 on the odd numbered loops. |
| * To get the actual mailbox offset based on the tail it |
| * is necessary to add bit 3 to bit 0 and clear bit 3. This |
| * gives us a valid range of 0x1 - 0xE. |
| * Head: Head index for remote FIFO |
| * Head index follows the same format as the tail index. |
| * Rsvd0: Reserved 0 portion of the mailbox header |
| * CRC: Running CRC for all data since connect plus current message header |
| * Size: Maximum message size - Applies only to connect headers |
| * The maximum message size is provided during connect to avoid |
| * jamming the mailbox with messages that do not fit. |
| * Err_no: Error number - Applies only to error headers |
| * The error number provides an indication of the type of error |
| * experienced. |
| */ |
| |
| /* macros for retrieving and setting header values */ |
| #define FM10K_MSG_HDR_MASK(name) \ |
| ((0x1u << FM10K_MSG_##name##_SIZE) - 1) |
| #define FM10K_MSG_HDR_FIELD_SET(value, name) \ |
| (((u32)(value) & FM10K_MSG_HDR_MASK(name)) << FM10K_MSG_##name##_SHIFT) |
| #define FM10K_MSG_HDR_FIELD_GET(value, name) \ |
| ((u16)((value) >> FM10K_MSG_##name##_SHIFT) & FM10K_MSG_HDR_MASK(name)) |
| |
| /* offsets shared between all headers */ |
| #define FM10K_MSG_TYPE_SHIFT 0 |
| #define FM10K_MSG_TYPE_SIZE 4 |
| #define FM10K_MSG_TAIL_SHIFT 4 |
| #define FM10K_MSG_TAIL_SIZE 4 |
| #define FM10K_MSG_HEAD_SHIFT 8 |
| #define FM10K_MSG_HEAD_SIZE 4 |
| #define FM10K_MSG_RSVD0_SHIFT 12 |
| #define FM10K_MSG_RSVD0_SIZE 4 |
| |
| /* offsets for data/disconnect headers */ |
| #define FM10K_MSG_CRC_SHIFT 16 |
| #define FM10K_MSG_CRC_SIZE 16 |
| |
| /* offsets for connect headers */ |
| #define FM10K_MSG_CONNECT_SIZE_SHIFT 16 |
| #define FM10K_MSG_CONNECT_SIZE_SIZE 16 |
| |
| /* offsets for error headers */ |
| #define FM10K_MSG_ERR_NO_SHIFT 16 |
| #define FM10K_MSG_ERR_NO_SIZE 16 |
| |
| enum fm10k_msg_type { |
| FM10K_MSG_DATA = 0x8, |
| FM10K_MSG_CONNECT = 0xC, |
| FM10K_MSG_DISCONNECT = 0xD, |
| FM10K_MSG_ERROR = 0xE, |
| }; |
| |
| /* HNI/SM Mailbox FIFO format |
| * 3 2 1 0 |
| * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 |
| * +-------+-----------------------+-------+-----------------------+ |
| * | Error | Remote Head |Version| Local Tail | |
| * +-------+-----------------------+-------+-----------------------+ |
| * | | |
| * . Local FIFO Data . |
| * . . |
| * +-------+-----------------------+-------+-----------------------+ |
| * |
| * The layout above describes the format for the FIFOs used by the host |
| * network interface and the switch manager to communicate messages back |
| * and forth. Both the HNI and the switch maintain one such FIFO. The |
| * layout in memory has the switch manager FIFO followed immediately by |
| * the HNI FIFO. For this reason I am using just the pointer to the |
| * HNI FIFO in the mailbox ops as the offset between the two is fixed. |
| * |
| * The header for the FIFO is broken out into the following fields: |
| * Local Tail: Offset into FIFO region for next DWORD to write. |
| * Version: Version info for mailbox, only values of 0/1 are supported. |
| * Remote Head: Offset into remote FIFO to indicate how much we have read. |
| * Error: Error indication, values TBD. |
| */ |
| |
| /* version number for switch manager mailboxes */ |
| #define FM10K_SM_MBX_VERSION 1 |
| #define FM10K_SM_MBX_FIFO_LEN (FM10K_MBMEM_PF_XOR - 1) |
| |
| /* offsets shared between all SM FIFO headers */ |
| #define FM10K_MSG_SM_TAIL_SHIFT 0 |
| #define FM10K_MSG_SM_TAIL_SIZE 12 |
| #define FM10K_MSG_SM_VER_SHIFT 12 |
| #define FM10K_MSG_SM_VER_SIZE 4 |
| #define FM10K_MSG_SM_HEAD_SHIFT 16 |
| #define FM10K_MSG_SM_HEAD_SIZE 12 |
| #define FM10K_MSG_SM_ERR_SHIFT 28 |
| #define FM10K_MSG_SM_ERR_SIZE 4 |
| |
| /* All error messages returned by mailbox functions |
| * The value -511 is 0xFE01 in hex. The idea is to order the errors |
| * from 0xFE01 - 0xFEFF so error codes are easily visible in the mailbox |
| * messages. This also helps to avoid error number collisions as Linux |
| * doesn't appear to use error numbers 256 - 511. |
| */ |
| #define FM10K_MBX_ERR(_n) ((_n) - 512) |
| #define FM10K_MBX_ERR_NO_MBX FM10K_MBX_ERR(0x01) |
| #define FM10K_MBX_ERR_NO_SPACE FM10K_MBX_ERR(0x03) |
| #define FM10K_MBX_ERR_TAIL FM10K_MBX_ERR(0x05) |
| #define FM10K_MBX_ERR_HEAD FM10K_MBX_ERR(0x06) |
| #define FM10K_MBX_ERR_SRC FM10K_MBX_ERR(0x08) |
| #define FM10K_MBX_ERR_TYPE FM10K_MBX_ERR(0x09) |
| #define FM10K_MBX_ERR_SIZE FM10K_MBX_ERR(0x0B) |
| #define FM10K_MBX_ERR_BUSY FM10K_MBX_ERR(0x0C) |
| #define FM10K_MBX_ERR_RSVD0 FM10K_MBX_ERR(0x0E) |
| #define FM10K_MBX_ERR_CRC FM10K_MBX_ERR(0x0F) |
| |
| #define FM10K_MBX_CRC_SEED 0xFFFF |
| |
| struct fm10k_mbx_ops { |
| s32 (*connect)(struct fm10k_hw *, struct fm10k_mbx_info *); |
| void (*disconnect)(struct fm10k_hw *, struct fm10k_mbx_info *); |
| bool (*rx_ready)(struct fm10k_mbx_info *); |
| bool (*tx_ready)(struct fm10k_mbx_info *, u16); |
| bool (*tx_complete)(struct fm10k_mbx_info *); |
| s32 (*enqueue_tx)(struct fm10k_hw *, struct fm10k_mbx_info *, |
| const u32 *); |
| s32 (*process)(struct fm10k_hw *, struct fm10k_mbx_info *); |
| s32 (*register_handlers)(struct fm10k_mbx_info *, |
| const struct fm10k_msg_data *); |
| }; |
| |
| struct fm10k_mbx_fifo { |
| u32 *buffer; |
| u16 head; |
| u16 tail; |
| u16 size; |
| }; |
| |
| /* size of buffer to be stored in mailbox for FIFOs */ |
| #define FM10K_MBX_TX_BUFFER_SIZE 512 |
| #define FM10K_MBX_RX_BUFFER_SIZE 128 |
| #define FM10K_MBX_BUFFER_SIZE \ |
| (FM10K_MBX_TX_BUFFER_SIZE + FM10K_MBX_RX_BUFFER_SIZE) |
| |
| /* minimum and maximum message size in dwords */ |
| #define FM10K_MBX_MSG_MAX_SIZE \ |
| ((FM10K_MBX_TX_BUFFER_SIZE - 1) & (FM10K_MBX_RX_BUFFER_SIZE - 1)) |
| #define FM10K_VFMBX_MSG_MTU ((FM10K_VFMBMEM_LEN / 2) - 1) |
| |
| #define FM10K_MBX_INIT_TIMEOUT 2000 /* number of retries on mailbox */ |
| #define FM10K_MBX_INIT_DELAY 500 /* microseconds between retries */ |
| |
| struct fm10k_mbx_info { |
| /* function pointers for mailbox operations */ |
| struct fm10k_mbx_ops ops; |
| const struct fm10k_msg_data *msg_data; |
| |
| /* message FIFOs */ |
| struct fm10k_mbx_fifo rx; |
| struct fm10k_mbx_fifo tx; |
| |
| /* delay for handling timeouts */ |
| u32 timeout; |
| u32 udelay; |
| |
| /* mailbox state info */ |
| u32 mbx_reg, mbmem_reg, mbx_lock, mbx_hdr; |
| u16 max_size, mbmem_len; |
| u16 tail, tail_len, pulled; |
| u16 head, head_len, pushed; |
| u16 local, remote; |
| enum fm10k_mbx_state state; |
| |
| /* result of last mailbox test */ |
| s32 test_result; |
| |
| /* statistics */ |
| u64 tx_busy; |
| u64 tx_dropped; |
| u64 tx_messages; |
| u64 tx_dwords; |
| u64 tx_mbmem_pulled; |
| u64 rx_messages; |
| u64 rx_dwords; |
| u64 rx_mbmem_pushed; |
| u64 rx_parse_err; |
| |
| /* Buffer to store messages */ |
| u32 buffer[FM10K_MBX_BUFFER_SIZE]; |
| }; |
| |
| s32 fm10k_pfvf_mbx_init(struct fm10k_hw *, struct fm10k_mbx_info *, |
| const struct fm10k_msg_data *, u8); |
| s32 fm10k_sm_mbx_init(struct fm10k_hw *, struct fm10k_mbx_info *, |
| const struct fm10k_msg_data *); |
| |
| #endif /* _FM10K_MBX_H_ */ |
