drivers/net/myri10ge/myri10ge_mcp.h

#ifndef __MYRI10GE_MCP_H__
#define __MYRI10GE_MCP_H__

#define MXGEFW_VERSION_MAJOR	1
#define MXGEFW_VERSION_MINOR	4

/* 8 Bytes */
struct mcp_dma_addr {
	__be32 high;
	__be32 low;
};

/* 4 Bytes */
struct mcp_slot {
	__sum16 checksum;
	__be16 length;
};

/* 64 Bytes */
struct mcp_cmd {
	__be32 cmd;
	__be32 data0;		/* will be low portion if data > 32 bits */
	/* 8 */
	__be32 data1;		/* will be high portion if data > 32 bits */
	__be32 data2;		/* currently unused.. */
	/* 16 */
	struct mcp_dma_addr response_addr;
	/* 24 */
	u8 pad[40];
};

/* 8 Bytes */
struct mcp_cmd_response {
	__be32 data;
	__be32 result;
};

/*
 * flags used in mcp_kreq_ether_send_t:
 *
 * The SMALL flag is only needed in the first segment. It is raised
 * for packets that are total less or equal 512 bytes.
 *
 * The CKSUM flag must be set in all segments.
 *
 * The PADDED flags is set if the packet needs to be padded, and it
 * must be set for all segments.
 *
 * The  MXGEFW_FLAGS_ALIGN_ODD must be set if the cumulative
 * length of all previous segments was odd.
 */

#define MXGEFW_FLAGS_SMALL      0x1
#define MXGEFW_FLAGS_TSO_HDR    0x1
#define MXGEFW_FLAGS_FIRST      0x2
#define MXGEFW_FLAGS_ALIGN_ODD  0x4
#define MXGEFW_FLAGS_CKSUM      0x8
#define MXGEFW_FLAGS_TSO_LAST   0x8
#define MXGEFW_FLAGS_NO_TSO     0x10
#define MXGEFW_FLAGS_TSO_CHOP   0x10
#define MXGEFW_FLAGS_TSO_PLD    0x20

#define MXGEFW_SEND_SMALL_SIZE  1520
#define MXGEFW_MAX_MTU          9400

union mcp_pso_or_cumlen {
	u16 pseudo_hdr_offset;
	u16 cum_len;
};

#define	MXGEFW_MAX_SEND_DESC 12
#define MXGEFW_PAD	    2

/* 16 Bytes */
struct mcp_kreq_ether_send {
	__be32 addr_high;
	__be32 addr_low;
	__be16 pseudo_hdr_offset;
	__be16 length;
	u8 pad;
	u8 rdma_count;
	u8 cksum_offset;	/* where to start computing cksum */
	u8 flags;		/* as defined above */
};

/* 8 Bytes */
struct mcp_kreq_ether_recv {
	__be32 addr_high;
	__be32 addr_low;
};

/* Commands */

#define	MXGEFW_BOOT_HANDOFF	0xfc0000
#define	MXGEFW_BOOT_DUMMY_RDMA	0xfc01c0

#define	MXGEFW_ETH_CMD		0xf80000
#define	MXGEFW_ETH_SEND_4	0x200000
#define	MXGEFW_ETH_SEND_1	0x240000
#define	MXGEFW_ETH_SEND_2	0x280000
#define	MXGEFW_ETH_SEND_3	0x2c0000
#define	MXGEFW_ETH_RECV_SMALL	0x300000
#define	MXGEFW_ETH_RECV_BIG	0x340000

#define	MXGEFW_ETH_SEND(n)		(0x200000 + (((n) & 0x03) * 0x40000))
#define	MXGEFW_ETH_SEND_OFFSET(n)	(MXGEFW_ETH_SEND(n) - MXGEFW_ETH_SEND_4)

enum myri10ge_mcp_cmd_type {
	MXGEFW_CMD_NONE = 0,
	/* Reset the mcp, it is left in a safe state, waiting
	 * for the driver to set all its parameters */
	MXGEFW_CMD_RESET,

	/* get the version number of the current firmware..
	 * (may be available in the eeprom strings..? */
	MXGEFW_GET_MCP_VERSION,

	/* Parameters which must be set by the driver before it can
	 * issue MXGEFW_CMD_ETHERNET_UP. They persist until the next
	 * MXGEFW_CMD_RESET is issued */

	MXGEFW_CMD_SET_INTRQ_DMA,
	MXGEFW_CMD_SET_BIG_BUFFER_SIZE,	/* in bytes, power of 2 */
	MXGEFW_CMD_SET_SMALL_BUFFER_SIZE,	/* in bytes */

	/* Parameters which refer to lanai SRAM addresses where the
	 * driver must issue PIO writes for various things */

	MXGEFW_CMD_GET_SEND_OFFSET,
	MXGEFW_CMD_GET_SMALL_RX_OFFSET,
	MXGEFW_CMD_GET_BIG_RX_OFFSET,
	MXGEFW_CMD_GET_IRQ_ACK_OFFSET,
	MXGEFW_CMD_GET_IRQ_DEASSERT_OFFSET,

	/* Parameters which refer to rings stored on the MCP,
	 * and whose size is controlled by the mcp */

	MXGEFW_CMD_GET_SEND_RING_SIZE,	/* in bytes */
	MXGEFW_CMD_GET_RX_RING_SIZE,	/* in bytes */

	/* Parameters which refer to rings stored in the host,
	 * and whose size is controlled by the host.  Note that
	 * all must be physically contiguous and must contain
	 * a power of 2 number of entries.  */

	MXGEFW_CMD_SET_INTRQ_SIZE,	/* in bytes */
#define MXGEFW_CMD_SET_INTRQ_SIZE_FLAG_NO_STRICT_SIZE_CHECK  (1 << 31)

	/* command to bring ethernet interface up.  Above parameters
	 * (plus mtu & mac address) must have been exchanged prior
	 * to issuing this command  */
	MXGEFW_CMD_ETHERNET_UP,

	/* command to bring ethernet interface down.  No further sends
	 * or receives may be processed until an MXGEFW_CMD_ETHERNET_UP
	 * is issued, and all interrupt queues must be flushed prior
	 * to ack'ing this command */

	MXGEFW_CMD_ETHERNET_DOWN,

	/* commands the driver may issue live, without resetting
	 * the nic.  Note that increasing the mtu "live" should
	 * only be done if the driver has already supplied buffers
	 * sufficiently large to handle the new mtu.  Decreasing
	 * the mtu live is safe */

	MXGEFW_CMD_SET_MTU,
	MXGEFW_CMD_GET_INTR_COAL_DELAY_OFFSET,	/* in microseconds */
	MXGEFW_CMD_SET_STATS_INTERVAL,	/* in microseconds */
	MXGEFW_CMD_SET_STATS_DMA_OBSOLETE,	/* replaced by SET_STATS_DMA_V2 */

	MXGEFW_ENABLE_PROMISC,
	MXGEFW_DISABLE_PROMISC,
	MXGEFW_SET_MAC_ADDRESS,

	MXGEFW_ENABLE_FLOW_CONTROL,
	MXGEFW_DISABLE_FLOW_CONTROL,

	/* do a DMA test
	 * data0,data1 = DMA address
	 * data2       = RDMA length (MSH), WDMA length (LSH)
	 * command return data = repetitions (MSH), 0.5-ms ticks (LSH)
	 */
	MXGEFW_DMA_TEST,

	MXGEFW_ENABLE_ALLMULTI,
	MXGEFW_DISABLE_ALLMULTI,

	/* returns MXGEFW_CMD_ERROR_MULTICAST
	 * if there is no room in the cache
	 * data0,MSH(data1) = multicast group address */
	MXGEFW_JOIN_MULTICAST_GROUP,
	/* returns MXGEFW_CMD_ERROR_MULTICAST
	 * if the address is not in the cache,
	 * or is equal to FF-FF-FF-FF-FF-FF
	 * data0,MSH(data1) = multicast group address */
	MXGEFW_LEAVE_MULTICAST_GROUP,
	MXGEFW_LEAVE_ALL_MULTICAST_GROUPS,

	MXGEFW_CMD_SET_STATS_DMA_V2,
	/* data0, data1 = bus addr,
	 * data2 = sizeof(struct mcp_irq_data) from driver point of view, allows
	 * adding new stuff to mcp_irq_data without changing the ABI */

	MXGEFW_CMD_UNALIGNED_TEST,
	/* same than DMA_TEST (same args) but abort with UNALIGNED on unaligned
	 * chipset */

	MXGEFW_CMD_UNALIGNED_STATUS,
	/* return data = boolean, true if the chipset is known to be unaligned */

	MXGEFW_CMD_ALWAYS_USE_N_BIG_BUFFERS,
	/* data0 = number of big buffers to use.  It must be 0 or a power of 2.
	 * 0 indicates that the NIC consumes as many buffers as they are required
	 * for packet. This is the default behavior.
	 * A power of 2 number indicates that the NIC always uses the specified
	 * number of buffers for each big receive packet.
	 * It is up to the driver to ensure that this value is big enough for
	 * the NIC to be able to receive maximum-sized packets.
	 */

	MXGEFW_CMD_GET_MAX_RSS_QUEUES,
	MXGEFW_CMD_ENABLE_RSS_QUEUES,
	/* data0 = number of slices n (0, 1, ..., n-1) to enable
	 * data1 = interrupt mode.
	 * 0=share one INTx/MSI, 1=use one MSI-X per queue.
	 * If all queues share one interrupt, the driver must have set
	 * RSS_SHARED_INTERRUPT_DMA before enabling queues.
	 */
#define MXGEFW_SLICE_INTR_MODE_SHARED 0
#define MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE 1

	MXGEFW_CMD_GET_RSS_SHARED_INTERRUPT_MASK_OFFSET,
	MXGEFW_CMD_SET_RSS_SHARED_INTERRUPT_DMA,
	/* data0, data1 = bus address lsw, msw */
	MXGEFW_CMD_GET_RSS_TABLE_OFFSET,
	/* get the offset of the indirection table */
	MXGEFW_CMD_SET_RSS_TABLE_SIZE,
	/* set the size of the indirection table */
	MXGEFW_CMD_GET_RSS_KEY_OFFSET,
	/* get the offset of the secret key */
	MXGEFW_CMD_RSS_KEY_UPDATED,
	/* tell nic that the secret key's been updated */
	MXGEFW_CMD_SET_RSS_ENABLE,
	/* data0 = enable/disable rss
	 * 0: disable rss.  nic does not distribute receive packets.
	 * 1: enable rss.  nic distributes receive packets among queues.
	 * data1 = hash type
	 * 1: IPV4            (required by RSS)
	 * 2: TCP_IPV4        (required by RSS)
	 * 3: IPV4 | TCP_IPV4 (required by RSS)
	 * 4: source port
	 */
#define MXGEFW_RSS_HASH_TYPE_IPV4      0x1
#define MXGEFW_RSS_HASH_TYPE_TCP_IPV4  0x2
#define MXGEFW_RSS_HASH_TYPE_SRC_PORT  0x4

	MXGEFW_CMD_GET_MAX_TSO6_HDR_SIZE,
	/* Return data = the max. size of the entire headers of a IPv6 TSO packet.
	 * If the header size of a IPv6 TSO packet is larger than the specified
	 * value, then the driver must not use TSO.
	 * This size restriction only applies to IPv6 TSO.
	 * For IPv4 TSO, the maximum size of the headers is fixed, and the NIC
	 * always has enough header buffer to store maximum-sized headers.
	 */

	MXGEFW_CMD_SET_TSO_MODE,
	/* data0 = TSO mode.
	 * 0: Linux/FreeBSD style (NIC default)
	 * 1: NDIS/NetBSD style
	 */
#define MXGEFW_TSO_MODE_LINUX  0
#define MXGEFW_TSO_MODE_NDIS   1

	MXGEFW_CMD_MDIO_READ,
	/* data0 = dev_addr (PMA/PMD or PCS ...), data1 = register/addr */
	MXGEFW_CMD_MDIO_WRITE,
	/* data0 = dev_addr,  data1 = register/addr, data2 = value  */

	MXGEFW_CMD_XFP_I2C_READ,
	/* Starts to get a fresh copy of one byte or of the whole xfp i2c table, the
	 * obtained data is cached inside the xaui-xfi chip :
	 *   data0 : "all" flag : 0 => get one byte, 1=> get 256 bytes,
	 *   data1 : if (data0 == 0): index of byte to refresh [ not used otherwise ]
	 * The operation might take ~1ms for a single byte or ~65ms when refreshing all 256 bytes
	 * During the i2c operation,  MXGEFW_CMD_XFP_I2C_READ or MXGEFW_CMD_XFP_BYTE attempts
	 *  will return MXGEFW_CMD_ERROR_BUSY
	 */
	MXGEFW_CMD_XFP_BYTE,
	/* Return the last obtained copy of a given byte in the xfp i2c table
	 * (copy cached during the last relevant MXGEFW_CMD_XFP_I2C_READ)
	 *   data0 : index of the desired table entry
	 *  Return data = the byte stored at the requested index in the table
	 */

	MXGEFW_CMD_GET_VPUMP_OFFSET,
	/* Return data = NIC memory offset of mcp_vpump_public_global */
	MXGEFW_CMD_RESET_VPUMP,
	/* Resets the VPUMP state */

	MXGEFW_CMD_SET_RSS_MCP_SLOT_TYPE,
	/* data0 = mcp_slot type to use.
	 * 0 = the default 4B mcp_slot
	 * 1 = 8B mcp_slot_8
	 */
#define MXGEFW_RSS_MCP_SLOT_TYPE_MIN        0
#define MXGEFW_RSS_MCP_SLOT_TYPE_WITH_HASH  1

	MXGEFW_CMD_SET_THROTTLE_FACTOR,
	/* set the throttle factor for ethp_z8e
	 * data0 = throttle_factor
	 * throttle_factor = 256 * pcie-raw-speed / tx_speed
	 * tx_speed = 256 * pcie-raw-speed / throttle_factor
	 *
	 * For PCI-E x8: pcie-raw-speed == 16Gb/s
	 * For PCI-E x4: pcie-raw-speed == 8Gb/s
	 *
	 * ex1: throttle_factor == 0x1a0 (416), tx_speed == 1.23GB/s == 9.846 Gb/s
	 * ex2: throttle_factor == 0x200 (512), tx_speed == 1.0GB/s == 8 Gb/s
	 *
	 * with tx_boundary == 2048, max-throttle-factor == 8191 => min-speed == 500Mb/s
	 * with tx_boundary == 4096, max-throttle-factor == 4095 => min-speed == 1Gb/s
	 */

	MXGEFW_CMD_VPUMP_UP,
	/* Allocates VPump Connection, Send Request and Zero copy buffer address tables */
	MXGEFW_CMD_GET_VPUMP_CLK,
	/* Get the lanai clock */

	MXGEFW_CMD_GET_DCA_OFFSET,
	/* offset of dca control for WDMAs */
};

enum myri10ge_mcp_cmd_status {
	MXGEFW_CMD_OK = 0,
	MXGEFW_CMD_UNKNOWN,
	MXGEFW_CMD_ERROR_RANGE,
	MXGEFW_CMD_ERROR_BUSY,
	MXGEFW_CMD_ERROR_EMPTY,
	MXGEFW_CMD_ERROR_CLOSED,
	MXGEFW_CMD_ERROR_HASH_ERROR,
	MXGEFW_CMD_ERROR_BAD_PORT,
	MXGEFW_CMD_ERROR_RESOURCES,
	MXGEFW_CMD_ERROR_MULTICAST,
	MXGEFW_CMD_ERROR_UNALIGNED,
	MXGEFW_CMD_ERROR_NO_MDIO,
	MXGEFW_CMD_ERROR_XFP_FAILURE,
	MXGEFW_CMD_ERROR_XFP_ABSENT,
	MXGEFW_CMD_ERROR_BAD_PCIE_LINK
};

#define MXGEFW_OLD_IRQ_DATA_LEN 40

struct mcp_irq_data {
	/* add new counters at the beginning */
	__be32 future_use[1];
	__be32 dropped_pause;
	__be32 dropped_unicast_filtered;
	__be32 dropped_bad_crc32;
	__be32 dropped_bad_phy;
	__be32 dropped_multicast_filtered;
	/* 40 Bytes */
	__be32 send_done_count;

#define MXGEFW_LINK_DOWN 0
#define MXGEFW_LINK_UP 1
#define MXGEFW_LINK_MYRINET 2
#define MXGEFW_LINK_UNKNOWN 3
	__be32 link_up;
	__be32 dropped_link_overflow;
	__be32 dropped_link_error_or_filtered;
	__be32 dropped_runt;
	__be32 dropped_overrun;
	__be32 dropped_no_small_buffer;
	__be32 dropped_no_big_buffer;
	__be32 rdma_tags_available;

	u8 tx_stopped;
	u8 link_down;
	u8 stats_updated;
	u8 valid;
};

#endif				/* __MYRI10GE_MCP_H__ */