ipath_common.h

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	__u32 spi_rcv_egrchunksize;
	/* total size of mmap to cover full rcvegrbuffers */
	__u32 spi_rcv_egrbuftotlen;
} __attribute__ ((aligned(8)));


/*
 * This version number is given to the driver by the user code during
 * initialization in the spu_userversion field of ipath_user_info, so
 * the driver can check for compatibility with user code.
 *
 * The major version changes when data structures
 * change in an incompatible way.  The driver must be the same or higher
 * for initialization to succeed.  In some cases, a higher version
 * driver will not interoperate with older software, and initialization
 * will return an error.
 */
#define IPATH_USER_SWMAJOR 1

/*
 * Minor version differences are always compatible
 * a within a major version, however if if user software is larger
 * than driver software, some new features and/or structure fields
 * may not be implemented; the user code must deal with this if it
 * cares, or it must abort after initialization reports the difference
 */
#define IPATH_USER_SWMINOR 2

#define IPATH_USER_SWVERSION ((IPATH_USER_SWMAJOR<<16) | IPATH_USER_SWMINOR)

#define IPATH_KERN_TYPE 0

/*
 * Similarly, this is the kernel version going back to the user.  It's
 * slightly different, in that we want to tell if the driver was built as
 * part of a PathScale release, or from the driver from OpenIB, kernel.org,
 * or a standard distribution, for support reasons.  The high bit is 0 for
 * non-PathScale, and 1 for PathScale-built/supplied.
 *
 * It's returned by the driver to the user code during initialization in the
 * spi_sw_version field of ipath_base_info, so the user code can in turn
 * check for compatibility with the kernel.
*/
#define IPATH_KERN_SWVERSION ((IPATH_KERN_TYPE<<31) | IPATH_USER_SWVERSION)

/*
 * This structure is passed to ipath_userinit() to tell the driver where
 * user code buffers are, sizes, etc.   The offsets and sizes of the
 * fields must remain unchanged, for binary compatibility.  It can
 * be extended, if userversion is changed so user code can tell, if needed
 */
struct ipath_user_info {
	/*
	 * version of user software, to detect compatibility issues.
	 * Should be set to IPATH_USER_SWVERSION.
	 */
	__u32 spu_userversion;

	/* desired number of receive header queue entries */
	__u32 spu_rcvhdrcnt;

	/* size of struct base_info to write to */
	__u32 spu_base_info_size;

	/*
	 * 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;

	/*
	 * cache line aligned (64 byte) user address to
	 * which the rcvhdrtail register will be written by infinipath
	 * whenever it changes, so that no chip registers are read in
	 * the performance path.
	 */
	__u64 spu_rcvhdraddr;

	/*
	 * 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	/* set up userspace */
#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_MAX		21

struct ipath_port_info {
	__u32 num_active;	/* number of active units */
	__u32 unit;		/* unit (chip) assigned to caller */
	__u32 port;		/* port on unit assigned to caller */
};

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;
	} 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];
};

/* Passed into SMA special file's ->read and ->write methods. */
struct ipath_sma_pkt
{
	__u32 unit;	/* unit on which to send packet */
	__u64 data;	/* address of payload in userspace */
	__u32 len;	/* length of payload */
};

/*
 * Data layout in I2C flash (for GUID, etc.)
 * All fields are little-endian binary unless otherwise stated
 */
#define IPATH_FLASH_VERSION 1
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_sum 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 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];
	/* 78 bytes used, min flash size is 128 bytes */
	__u8 if_future[50];
};

/*
 * 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

/* SendPIO per-buffer control */
#define INFINIPATH_SP_LENGTHP1_MASK 0x3FF
#define INFINIPATH_SP_LENGTHP1_SHIFT 0
#define INFINIPATH_SP_INTR    0x80000000
#define INFINIPATH_SP_TEST    0x40000000
#define INFINIPATH_SP_TESTEBP 0x20000000

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

#endif				/* _IPATH_COMMON_H */