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ipath_common.h

/*
 * Copyright (c) 2006, 2007 QLogic Corporation. All rights reserved.
 * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef _IPATH_COMMON_H
#define _IPATH_COMMON_H

/*
 * This file contains defines, structures, etc. that are used
 * to communicate between kernel and user code.
 */


/* This is the IEEE-assigned OUI for QLogic Inc. InfiniPath */
#define IPATH_SRC_OUI_1 0x00
#define IPATH_SRC_OUI_2 0x11
#define IPATH_SRC_OUI_3 0x75

/* version of protocol header (known to chip also). In the long run,
 * we should be able to generate and accept a range of version numbers;
 * for now we only accept one, and it's compiled in.
 */
#define IPS_PROTO_VERSION 2

/*
 * These are compile time constants that you may want to enable or disable
 * if you are trying to debug problems with code or performance.
 * IPATH_VERBOSE_TRACING define as 1 if you want additional tracing in
 * fastpath code
 * IPATH_TRACE_REGWRITES define as 1 if you want register writes to be
 * traced in faspath code
 * _IPATH_TRACING define as 0 if you want to remove all tracing in a
 * compilation unit
 * _IPATH_DEBUGGING define as 0 if you want to remove debug prints
 */

/*
 * The value in the BTH QP field that InfiniPath uses to differentiate
 * an infinipath protocol IB packet vs standard IB transport
 */
#define IPATH_KD_QP 0x656b79

/*
 * valid states passed to ipath_set_linkstate() user call
 */
#define IPATH_IB_LINKDOWN           0
#define IPATH_IB_LINKARM            1
#define IPATH_IB_LINKACTIVE         2
#define IPATH_IB_LINKINIT           3
#define IPATH_IB_LINKDOWN_SLEEP           4
#define IPATH_IB_LINKDOWN_DISABLE   5
#define IPATH_IB_LINK_LOOPBACK      6 /* enable local loopback */
#define IPATH_IB_LINK_EXTERNAL      7 /* normal, disable local loopback */

/*
 * stats maintained by the driver.  For now, at least, this is global
 * to all minor devices.
 */
struct infinipath_stats {
      /* number of interrupts taken */
      __u64 sps_ints;
      /* number of interrupts for errors */
      __u64 sps_errints;
      /* number of errors from chip (not incl. packet errors or CRC) */
      __u64 sps_errs;
      /* number of packet errors from chip other than CRC */
      __u64 sps_pkterrs;
      /* number of packets with CRC errors (ICRC and VCRC) */
      __u64 sps_crcerrs;
      /* number of hardware errors reported (parity, etc.) */
      __u64 sps_hwerrs;
      /* number of times IB link changed state unexpectedly */
      __u64 sps_iblink;
      __u64 sps_unused; /* was fastrcvint, no longer implemented */
      /* number of kernel (port0) packets received */
      __u64 sps_port0pkts;
      /* number of "ethernet" packets sent by driver */
      __u64 sps_ether_spkts;
      /* number of "ethernet" packets received by driver */
      __u64 sps_ether_rpkts;
      /* number of SMA packets sent by driver. Obsolete. */
      __u64 sps_sma_spkts;
      /* number of SMA packets received by driver. Obsolete. */
      __u64 sps_sma_rpkts;
      /* number of times all ports rcvhdrq was full and packet dropped */
      __u64 sps_hdrqfull;
      /* number of times all ports egrtid was full and packet dropped */
      __u64 sps_etidfull;
      /*
       * number of times we tried to send from driver, but no pio buffers
       * avail
       */
      __u64 sps_nopiobufs;
      /* number of ports currently open */
      __u64 sps_ports;
      /* list of pkeys (other than default) accepted (0 means not set) */
      __u16 sps_pkeys[4];
      __u16 sps_unused16[4]; /* available; maintaining compatible layout */
      /* number of user ports per chip (not IB ports) */
      __u32 sps_nports;
      /* not our interrupt, or already handled */
      __u32 sps_nullintr;
      /* max number of packets handled per receive call */
      __u32 sps_maxpkts_call;
      /* avg number of packets handled per receive call */
      __u32 sps_avgpkts_call;
      /* total number of pages locked */
      __u64 sps_pagelocks;
      /* total number of pages unlocked */
      __u64 sps_pageunlocks;
      /*
       * Number of packets dropped in kernel other than errors (ether
       * packets if ipath not configured, etc.)
       */
      __u64 sps_krdrops;
      __u64 sps_txeparity; /* PIO buffer parity error, recovered */
      /* pad for future growth */
      __u64 __sps_pad[45];
};

/*
 * These are the status bits readable (in ascii form, 64bit value)
 * from the "status" sysfs file.
 */
#define IPATH_STATUS_INITTED       0x1    /* basic initialization done */
#define IPATH_STATUS_DISABLED      0x2    /* hardware disabled */
/* Device has been disabled via admin request */
#define IPATH_STATUS_ADMIN_DISABLED    0x4
/* Chip has been found and initted */
#define IPATH_STATUS_CHIP_PRESENT 0x20
/* IB link is at ACTIVE, usable for data traffic */
#define IPATH_STATUS_IB_READY     0x40
/* link is configured, LID, MTU, etc. have been set */
#define IPATH_STATUS_IB_CONF      0x80
/* no link established, probably no cable */
#define IPATH_STATUS_IB_NOCABLE  0x100
/* A Fatal hardware error has occurred. */
#define IPATH_STATUS_HWERROR     0x200

/*
 * The list of usermode accessible registers.  Also see Reg_* later in file.
 */
typedef enum _ipath_ureg {
      /* (RO)  DMA RcvHdr to be used next. */
      ur_rcvhdrtail = 0,
      /* (RW)  RcvHdr entry to be processed next by host. */
      ur_rcvhdrhead = 1,
      /* (RO)  Index of next Eager index to use. */
      ur_rcvegrindextail = 2,
      /* (RW)  Eager TID to be processed next */
      ur_rcvegrindexhead = 3,
      /* For internal use only; max register number. */
      _IPATH_UregMax
} ipath_ureg;

/* bit values for spi_runtime_flags */
#define IPATH_RUNTIME_HT      0x1
#define IPATH_RUNTIME_PCIE    0x2
#define IPATH_RUNTIME_FORCE_WC_ORDER      0x4
#define IPATH_RUNTIME_RCVHDR_COPY   0x8
#define IPATH_RUNTIME_MASTER  0x10
/* 0x20 and 0x40 are no longer used, but are reserved for ABI compatibility */
#define IPATH_RUNTIME_FORCE_PIOAVAIL 0x400
#define IPATH_RUNTIME_PIO_REGSWAPPED 0x800

/*
 * This structure is returned by ipath_userinit() immediately after
 * open to get implementation-specific info, and info specific to this
 * instance.
 *
 * This struct must have explict pad fields where type sizes
 * may result in different alignments between 32 and 64 bit
 * programs, since the 64 bit * bit kernel requires the user code
 * to have matching offsets
 */
struct ipath_base_info {
      /* version of hardware, for feature checking. */
      __u32 spi_hw_version;
      /* version of software, for feature checking. */
      __u32 spi_sw_version;
      /* InfiniPath port assigned, goes into sent packets */
      __u16 spi_port;
      __u16 spi_subport;
      /*
       * IB MTU, packets IB data must be less than this.
       * The MTU is in bytes, and will be a multiple of 4 bytes.
       */
      __u32 spi_mtu;
      /*
       * Size of a PIO buffer.  Any given packet's total size must be less
       * than this (in words).  Included is the starting control word, so
       * if 513 is returned, then total pkt size is 512 words or less.
       */
      __u32 spi_piosize;
      /* size of the TID cache in infinipath, in entries */
      __u32 spi_tidcnt;
      /* size of the TID Eager list in infinipath, in entries */
      __u32 spi_tidegrcnt;
      /* size of a single receive header queue entry in words. */
      __u32 spi_rcvhdrent_size;
      /*
       * Count of receive header queue entries allocated.
       * This may be less than the spu_rcvhdrcnt passed in!.
       */
      __u32 spi_rcvhdr_cnt;

      /* per-chip and other runtime features bitmap (IPATH_RUNTIME_*) */
      __u32 spi_runtime_flags;

      /* address where receive buffer queue is mapped into */
      __u64 spi_rcvhdr_base;

      /* user program. */

      /* base address of eager TID receive buffers. */
      __u64 spi_rcv_egrbufs;

      /* Allocated by initialization code, not by protocol. */

      /*
       * Size of each TID buffer in host memory, starting at
       * spi_rcv_egrbufs.  The buffers are virtually contiguous.
       */
      __u32 spi_rcv_egrbufsize;
      /*
       * The special QP (queue pair) value that identifies an infinipath
       * protocol packet from standard IB packets.  More, probably much
       * more, to be added.
       */
      __u32 spi_qpair;

      /*
       * User register base for init code, not to be used directly by
       * protocol or applications.
       */
      __u64 __spi_uregbase;
      /*
       * Maximum buffer size in bytes that can be used in a single TID
       * entry (assuming the buffer is aligned to this boundary).  This is
       * the minimum of what the hardware and software support Guaranteed
       * to be a power of 2.
       */
      __u32 spi_tid_maxsize;
      /*
       * alignment of each pio send buffer (byte count
       * to add to spi_piobufbase to get to second buffer)
       */
      __u32 spi_pioalign;
      /*
       * The index of the first pio buffer available to this process;
       * needed to do lookup in spi_pioavailaddr; not added to
       * spi_piobufbase.
       */
      __u32 spi_pioindex;
       /* number of buffers mapped for this process */
      __u32 spi_piocnt;

      /*
       * Base address of writeonly pio buffers for this process.
       * Each buffer has spi_piosize words, and is aligned on spi_pioalign
       * boundaries.  spi_piocnt buffers are mapped from this address
       */
      __u64 spi_piobufbase;

      /*
       * Base address of readonly memory copy of the pioavail registers.
       * There are 2 bits for each buffer.
       */
      __u64 spi_pioavailaddr;

      /*
       * Address where driver updates a copy of the interface and driver
       * status (IPATH_STATUS_*) as a 64 bit value.  It's followed by a
       * string indicating hardware error, if there was one.
       */
      __u64 spi_status;

      /* number of chip ports available to user processes */
      __u32 spi_nports;
      /* unit number of chip we are using */
      __u32 spi_unit;
      /* num bufs in each contiguous set */
      __u32 spi_rcv_egrperchunk;
      /* size in bytes of each contiguous set */
      __u32 spi_rcv_egrchunksize;
      /* total size of mmap to cover full rcvegrbuffers */
      __u32 spi_rcv_egrbuftotlen;
      __u32 spi_filler_for_align;
      /* address of readonly memory copy of the rcvhdrq tail register. */
      __u64 spi_rcvhdr_tailaddr;

      /* shared memory pages for subports if port is shared */
      __u64 spi_subport_uregbase;
      __u64 spi_subport_rcvegrbuf;
      __u64 spi_subport_rcvhdr_base;

      /* shared memory page for hardware port if it is shared */
      __u64 spi_port_uregbase;
      __u64 spi_port_rcvegrbuf;
      __u64 spi_port_rcvhdr_base;
      __u64 spi_port_rcvhdr_tailaddr;

} __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 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 6

#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 QLogic release, or from the driver from openfabrics.org,
 * kernel.org, or a standard distribution, for support reasons.
 * The high bit is 0 for non-QLogic and 1 for QLogic-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;

      /*
       * 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 */

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