ipath_common.h

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	 * number of words in KD protocol header
	 * This tells InfiniPath how many words to copy to rcvhdrq.  If 0,
	 * kernel uses a default.  Once set, attempts to set any other value
	 * are an error (EAGAIN) until driver is reloaded.
	 */
	__u32 spu_rcvhdrsize;

	/*
	 * If two or more processes wish to share a port, each process
	 * must set the spu_subport_cnt and spu_subport_id to the same
	 * values.  The only restriction on the spu_subport_id is that
	 * it be unique for a given node.
	 */
	__u16 spu_subport_cnt;
	__u16 spu_subport_id;

	__u32 spu_unused; /* kept for compatible layout */

	/*
	 * address of struct base_info to write to
	 */
	__u64 spu_base_info;

} __attribute__ ((aligned(8)));

/* User commands. */

#define IPATH_CMD_MIN		16

#define __IPATH_CMD_USER_INIT	16	/* old set up userspace (for old user code) */
#define IPATH_CMD_PORT_INFO	17	/* find out what resources we got */
#define IPATH_CMD_RECV_CTRL	18	/* control receipt of packets */
#define IPATH_CMD_TID_UPDATE	19	/* update expected TID entries */
#define IPATH_CMD_TID_FREE	20	/* free expected TID entries */
#define IPATH_CMD_SET_PART_KEY	21	/* add partition key */
#define __IPATH_CMD_SLAVE_INFO	22	/* return info on slave processes (for old user code) */
#define IPATH_CMD_ASSIGN_PORT	23	/* allocate HCA and port */
#define IPATH_CMD_USER_INIT 	24	/* set up userspace */
#define IPATH_CMD_UNUSED_1	25
#define IPATH_CMD_UNUSED_2	26
#define IPATH_CMD_PIOAVAILUPD	27	/* force an update of PIOAvail reg */
#define IPATH_CMD_POLL_TYPE	28	/* set the kind of polling we want */

#define IPATH_CMD_MAX		28

/*
 * Poll types
 */
#define IPATH_POLL_TYPE_URGENT	 0x01
#define IPATH_POLL_TYPE_OVERFLOW 0x02

struct ipath_port_info {
	__u32 num_active;	/* number of active units */
	__u32 unit;		/* unit (chip) assigned to caller */
	__u16 port;		/* port on unit assigned to caller */
	__u16 subport;		/* subport on unit assigned to caller */
	__u16 num_ports;	/* number of ports available on unit */
	__u16 num_subports;	/* number of subports opened on port */
};

struct ipath_tid_info {
	__u32 tidcnt;
	/* make structure same size in 32 and 64 bit */
	__u32 tid__unused;
	/* virtual address of first page in transfer */
	__u64 tidvaddr;
	/* pointer (same size 32/64 bit) to __u16 tid array */
	__u64 tidlist;

	/*
	 * pointer (same size 32/64 bit) to bitmap of TIDs used
	 * for this call; checked for being large enough at open
	 */
	__u64 tidmap;
};

struct ipath_cmd {
	__u32 type;			/* command type */
	union {
		struct ipath_tid_info tid_info;
		struct ipath_user_info user_info;
		/* address in userspace of struct ipath_port_info to
		   write result to */
		__u64 port_info;
		/* enable/disable receipt of packets */
		__u32 recv_ctrl;
		/* partition key to set */
		__u16 part_key;
		/* user address of __u32 bitmask of active slaves */
		__u64 slave_mask_addr;
		/* type of polling we want */
		__u16 poll_type;
	} cmd;
};

struct ipath_iovec {
	/* Pointer to data, but same size 32 and 64 bit */
	__u64 iov_base;

	/*
	 * Length of data; don't need 64 bits, but want
	 * ipath_sendpkt to remain same size as before 32 bit changes, so...
	 */
	__u64 iov_len;
};

/*
 * Describes a single packet for send.  Each packet can have one or more
 * buffers, but the total length (exclusive of IB headers) must be less
 * than the MTU, and if using the PIO method, entire packet length,
 * including IB headers, must be less than the ipath_piosize value (words).
 * Use of this necessitates including sys/uio.h
 */
struct __ipath_sendpkt {
	__u32 sps_flags;	/* flags for packet (TBD) */
	__u32 sps_cnt;		/* number of entries to use in sps_iov */
	/* array of iov's describing packet. TEMPORARY */
	struct ipath_iovec sps_iov[4];
};

/*
 * diagnostics can send a packet by "writing" one of the following
 * two structs to diag data special file
 * The first is the legacy version for backward compatibility
 */
struct ipath_diag_pkt {
	__u32 unit;
	__u64 data;
	__u32 len;
};

/* The second diag_pkt struct is the expanded version that allows
 * more control over the packet, specifically, by allowing a custom
 * pbc (+ extra) qword, so that special modes and deliberate
 * changes to CRCs can be used. The elements were also re-ordered
 * for better alignment and to avoid padding issues.
 */
struct ipath_diag_xpkt {
	__u64 data;
	__u64 pbc_wd;
	__u32 unit;
	__u32 len;
};

/*
 * Data layout in I2C flash (for GUID, etc.)
 * All fields are little-endian binary unless otherwise stated
 */
#define IPATH_FLASH_VERSION 2
struct ipath_flash {
	/* flash layout version (IPATH_FLASH_VERSION) */
	__u8 if_fversion;
	/* checksum protecting if_length bytes */
	__u8 if_csum;
	/*
	 * valid length (in use, protected by if_csum), including
	 * if_fversion and if_csum themselves)
	 */
	__u8 if_length;
	/* the GUID, in network order */
	__u8 if_guid[8];
	/* number of GUIDs to use, starting from if_guid */
	__u8 if_numguid;
	/* the (last 10 characters of) board serial number, in ASCII */
	char if_serial[12];
	/* board mfg date (YYYYMMDD ASCII) */
	char if_mfgdate[8];
	/* last board rework/test date (YYYYMMDD ASCII) */
	char if_testdate[8];
	/* logging of error counts, TBD */
	__u8 if_errcntp[4];
	/* powered on hours, updated at driver unload */
	__u8 if_powerhour[2];
	/* ASCII free-form comment field */
	char if_comment[32];
	/* Backwards compatible prefix for longer QLogic Serial Numbers */
	char if_sprefix[4];
	/* 82 bytes used, min flash size is 128 bytes */
	__u8 if_future[46];
};

/*
 * These are the counters implemented in the chip, and are listed in order.
 * The InterCaps naming is taken straight from the chip spec.
 */
struct infinipath_counters {
	__u64 LBIntCnt;
	__u64 LBFlowStallCnt;
	__u64 Reserved1;
	__u64 TxUnsupVLErrCnt;
	__u64 TxDataPktCnt;
	__u64 TxFlowPktCnt;
	__u64 TxDwordCnt;
	__u64 TxLenErrCnt;
	__u64 TxMaxMinLenErrCnt;
	__u64 TxUnderrunCnt;
	__u64 TxFlowStallCnt;
	__u64 TxDroppedPktCnt;
	__u64 RxDroppedPktCnt;
	__u64 RxDataPktCnt;
	__u64 RxFlowPktCnt;
	__u64 RxDwordCnt;
	__u64 RxLenErrCnt;
	__u64 RxMaxMinLenErrCnt;
	__u64 RxICRCErrCnt;
	__u64 RxVCRCErrCnt;
	__u64 RxFlowCtrlErrCnt;
	__u64 RxBadFormatCnt;
	__u64 RxLinkProblemCnt;
	__u64 RxEBPCnt;
	__u64 RxLPCRCErrCnt;
	__u64 RxBufOvflCnt;
	__u64 RxTIDFullErrCnt;
	__u64 RxTIDValidErrCnt;
	__u64 RxPKeyMismatchCnt;
	__u64 RxP0HdrEgrOvflCnt;
	__u64 RxP1HdrEgrOvflCnt;
	__u64 RxP2HdrEgrOvflCnt;
	__u64 RxP3HdrEgrOvflCnt;
	__u64 RxP4HdrEgrOvflCnt;
	__u64 RxP5HdrEgrOvflCnt;
	__u64 RxP6HdrEgrOvflCnt;
	__u64 RxP7HdrEgrOvflCnt;
	__u64 RxP8HdrEgrOvflCnt;
	__u64 Reserved6;
	__u64 Reserved7;
	__u64 IBStatusChangeCnt;
	__u64 IBLinkErrRecoveryCnt;
	__u64 IBLinkDownedCnt;
	__u64 IBSymbolErrCnt;
};

/*
 * The next set of defines are for packet headers, and chip register
 * and memory bits that are visible to and/or used by user-mode software
 * The other bits that are used only by the driver or diags are in
 * ipath_registers.h
 */

/* RcvHdrFlags bits */
#define INFINIPATH_RHF_LENGTH_MASK 0x7FF
#define INFINIPATH_RHF_LENGTH_SHIFT 0
#define INFINIPATH_RHF_RCVTYPE_MASK 0x7
#define INFINIPATH_RHF_RCVTYPE_SHIFT 11
#define INFINIPATH_RHF_EGRINDEX_MASK 0x7FF
#define INFINIPATH_RHF_EGRINDEX_SHIFT 16
#define INFINIPATH_RHF_H_ICRCERR   0x80000000
#define INFINIPATH_RHF_H_VCRCERR   0x40000000
#define INFINIPATH_RHF_H_PARITYERR 0x20000000
#define INFINIPATH_RHF_H_LENERR    0x10000000
#define INFINIPATH_RHF_H_MTUERR    0x08000000
#define INFINIPATH_RHF_H_IHDRERR   0x04000000
#define INFINIPATH_RHF_H_TIDERR    0x02000000
#define INFINIPATH_RHF_H_MKERR     0x01000000
#define INFINIPATH_RHF_H_IBERR     0x00800000
#define INFINIPATH_RHF_L_SWA       0x00008000
#define INFINIPATH_RHF_L_SWB       0x00004000

/* infinipath header fields */
#define INFINIPATH_I_VERS_MASK 0xF
#define INFINIPATH_I_VERS_SHIFT 28
#define INFINIPATH_I_PORT_MASK 0xF
#define INFINIPATH_I_PORT_SHIFT 24
#define INFINIPATH_I_TID_MASK 0x7FF
#define INFINIPATH_I_TID_SHIFT 13
#define INFINIPATH_I_OFFSET_MASK 0x1FFF
#define INFINIPATH_I_OFFSET_SHIFT 0

/* K_PktFlags bits */
#define INFINIPATH_KPF_INTR 0x1
#define INFINIPATH_KPF_SUBPORT_MASK 0x3
#define INFINIPATH_KPF_SUBPORT_SHIFT 1

#define INFINIPATH_MAX_SUBPORT	4

/* SendPIO per-buffer control */
#define INFINIPATH_SP_TEST    0x40
#define INFINIPATH_SP_TESTEBP 0x20

/* SendPIOAvail bits */
#define INFINIPATH_SENDPIOAVAIL_BUSY_SHIFT 1
#define INFINIPATH_SENDPIOAVAIL_CHECK_SHIFT 0

/* infinipath header format */
struct ipath_header {
	/*
	 * Version - 4 bits, Port - 4 bits, TID - 10 bits and Offset -
	 * 14 bits before ECO change ~28 Dec 03.  After that, Vers 4,
	 * Port 4, TID 11, offset 13.
	 */
	__le32 ver_port_tid_offset;
	__le16 chksum;
	__le16 pkt_flags;
};

/* infinipath user message header format.
 * This structure contains the first 4 fields common to all protocols
 * that employ infinipath.
 */
struct ipath_message_header {
	__be16 lrh[4];
	__be32 bth[3];
	/* fields below this point are in host byte order */
	struct ipath_header iph;
	__u8 sub_opcode;
};

/* infinipath ethernet header format */
struct ether_header {
	__be16 lrh[4];
	__be32 bth[3];
	struct ipath_header iph;
	__u8 sub_opcode;
	__u8 cmd;
	__be16 lid;
	__u16 mac[3];
	__u8 frag_num;
	__u8 seq_num;
	__le32 len;
	/* MUST be of word size due to PIO write requirements */
	__le32 csum;
	__le16 csum_offset;
	__le16 flags;
	__u16 first_2_bytes;
	__u8 unused[2];		/* currently unused */
};


/* IB - LRH header consts */
#define IPATH_LRH_GRH 0x0003	/* 1. word of IB LRH - next header: GRH */
#define IPATH_LRH_BTH 0x0002	/* 1. word of IB LRH - next header: BTH */

/* misc. */
#define SIZE_OF_CRC 1

#define IPATH_DEFAULT_P_KEY 0xFFFF
#define IPATH_PERMISSIVE_LID 0xFFFF
#define IPATH_AETH_CREDIT_SHIFT 24
#define IPATH_AETH_CREDIT_MASK 0x1F
#define IPATH_AETH_CREDIT_INVAL 0x1F
#define IPATH_PSN_MASK 0xFFFFFF
#define IPATH_MSN_MASK 0xFFFFFF
#define IPATH_QPN_MASK 0xFFFFFF
#define IPATH_MULTICAST_LID_BASE 0xC000
#define IPATH_MULTICAST_QPN 0xFFFFFF

/* Receive Header Queue: receive type (from infinipath) */
#define RCVHQ_RCV_TYPE_EXPECTED  0
#define RCVHQ_RCV_TYPE_EAGER     1
#define RCVHQ_RCV_TYPE_NON_KD    2
#define RCVHQ_RCV_TYPE_ERROR     3


/* sub OpCodes - ith4x  */
#define IPATH_ITH4X_OPCODE_ENCAP 0x81
#define IPATH_ITH4X_OPCODE_LID_ARP 0x82

#define IPATH_HEADER_QUEUE_WORDS 9

/* functions for extracting fields from rcvhdrq entries for the driver.
 */
static inline __u32 ipath_hdrget_err_flags(const __le32 * rbuf)
{
	return __le32_to_cpu(rbuf[1]);
}

static inline __u32 ipath_hdrget_rcv_type(const __le32 * rbuf)
{
	return (__le32_to_cpu(rbuf[0]) >> INFINIPATH_RHF_RCVTYPE_SHIFT)
	    & INFINIPATH_RHF_RCVTYPE_MASK;
}

static inline __u32 ipath_hdrget_length_in_bytes(const __le32 * rbuf)
{
	return ((__le32_to_cpu(rbuf[0]) >> INFINIPATH_RHF_LENGTH_SHIFT)
		& INFINIPATH_RHF_LENGTH_MASK) << 2;
}

static inline __u32 ipath_hdrget_index(const __le32 * rbuf)
{
	return (__le32_to_cpu(rbuf[0]) >> INFINIPATH_RHF_EGRINDEX_SHIFT)
	    & INFINIPATH_RHF_EGRINDEX_MASK;
}

static inline __u32 ipath_hdrget_ipath_ver(__le32 hdrword)
{
	return (__le32_to_cpu(hdrword) >> INFINIPATH_I_VERS_SHIFT)
	    & INFINIPATH_I_VERS_MASK;
}

#endif				/* _IPATH_COMMON_H */