path: root/drivers/infiniband/hw/ipath/ipath_kernel.h

#ifndef _IPATH_KERNEL_H
#define _IPATH_KERNEL_H
/*
 * Copyright (c) 2006, 2007, 2008 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.
 */

/*
 * This header file is the base header file for infinipath kernel code
 * ipath_user.h serves a similar purpose for user code.
 */

#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/mutex.h>
#include <linux/list.h>
#include <linux/scatterlist.h>
#include <asm/io.h>
#include <rdma/ib_verbs.h>

#include "ipath_common.h"
#include "ipath_debug.h"
#include "ipath_registers.h"

/* only s/w major version of InfiniPath we can handle */
#define IPATH_CHIP_VERS_MAJ 2U

/* don't care about this except printing */
#define IPATH_CHIP_VERS_MIN 0U

/* temporary, maybe always */
extern struct infinipath_stats ipath_stats;

#define IPATH_CHIP_SWVERSION IPATH_CHIP_VERS_MAJ
/*
 * First-cut critierion for "device is active" is
 * two thousand dwords combined Tx, Rx traffic per
 * 5-second interval. SMA packets are 64 dwords,
 * and occur "a few per second", presumably each way.
 */
#define IPATH_TRAFFIC_ACTIVE_THRESHOLD (2000)
/*
 * Struct used to indicate which errors are logged in each of the
 * error-counters that are logged to EEPROM. A counter is incremented
 * _once_ (saturating at 255) for each event with any bits set in
 * the error or hwerror register masks below.
 */
#define IPATH_EEP_LOG_CNT (4)
struct ipath_eep_log_mask {
	u64 errs_to_log;
	u64 hwerrs_to_log;
};

struct ipath_portdata {
	void **port_rcvegrbuf;
	dma_addr_t *port_rcvegrbuf_phys;
	/* rcvhdrq base, needs mmap before useful */
	void *port_rcvhdrq;
	/* kernel virtual address where hdrqtail is updated */
	void *port_rcvhdrtail_kvaddr;
	/*
	 * temp buffer for expected send setup, allocated at open, instead
	 * of each setup call
	 */
	void *port_tid_pg_list;
	/* when waiting for rcv or pioavail */
	wait_queue_head_t port_wait;
	/*
	 * rcvegr bufs base, physical, must fit
	 * in 44 bits so 32 bit programs mmap64 44 bit works)
	 */
	dma_addr_t port_rcvegr_phys;
	/* mmap of hdrq, must fit in 44 bits */
	dma_addr_t port_rcvhdrq_phys;
	dma_addr_t port_rcvhdrqtailaddr_phys;
	/*
	 * number of opens (including slave subports) on this instance
	 * (ignoring forks, dup, etc. for now)
	 */
	int port_cnt;
	/*
	 * how much space to leave at start of eager TID entries for
	 * protocol use, on each TID
	 */
	/* instead of calculating it */
	unsigned port_port;
	/* non-zero if port is being shared. */
	u16 port_subport_cnt;
	/* non-zero if port is being shared. */
	u16 port_subport_id;
	/* number of pio bufs for this port (all procs, if shared) */
	u32 port_piocnt;
	/* first pio buffer for this port */
	u32 port_pio_base;
	/* chip offset of PIO buffers for this port */
	u32 port_piobufs;
	/* how many alloc_pages() chunks in port_rcvegrbuf_pages */
	u32 port_rcvegrbuf_chunks;
	/* how many egrbufs per chunk */
	u32 port_rcvegrbufs_perchunk;
	/* order for port_rcvegrbuf_pages */
	size_t port_rcvegrbuf_size;
	/* rcvhdrq size (for freeing) */
	size_t port_rcvhdrq_size;
	/* next expected TID to check when looking for free */
	u32 port_tidcursor;
	/* next expected TID to check */
	unsigned long port_flag;
	/* what happened */
	unsigned long int_flag;
	/* WAIT_RCV that timed out, no interrupt */
	u32 port_rcvwait_to;
	/* WAIT_PIO that timed out, no interrupt */
	u32 port_piowait_to;
	/* WAIT_RCV already happened, no wait */
	u32 port_rcvnowait;
	/* WAIT_PIO already happened, no wait */
	u32 port_pionowait;
	/* total number of rcvhdrqfull errors */
	u32 port_hdrqfull;
	/*
	 * Used to suppress multiple instances of same
	 * port staying stuck at same point.
	 */
	u32 port_lastrcvhdrqtail;
	/* saved total number of rcvhdrqfull errors for poll edge trigger */
	u32 port_hdrqfull_poll;
	/* total number of polled urgent packets */
	u32 port_urgent;
	/* saved total number of polled urgent packets for poll edge trigger */
	u32 port_urgent_poll;
	/* pid of process using this port */
	struct pid *port_pid;
	struct pid *port_subpid[INFINIPATH_MAX_SUBPORT];
	/* same size as task_struct .comm[] */
	char port_comm[16];
	/* pkeys set by this use of this port */
	u16 port_pkeys[4];
	/* so file ops can get at unit */
	struct ipath_devdata *port_dd;
	/* A page of memory for rcvhdrhead, rcvegrhead, rcvegrtail * N */
	void *subport_uregbase;
	/* An array of pages for the eager receive buffers * N */
	void *subport_rcvegrbuf;
	/* An array of pages for the eager header queue entries * N */
	void *subport_rcvhdr_base;
	/* The version of the library which opened this port */
	u32 userversion;
	/* Bitmask of active slaves */
	u32 active_slaves;
	/* Type of packets or conditions we want to poll for */
	u16 poll_type;
	/* port rcvhdrq head offset */
	u32 port_head;
	/* receive packet sequence counter */
	u32 port_seq_cnt;
};

struct sk_buff;
struct ipath_sge_state;
struct ipath_verbs_txreq;

/*
 * control information for layered drivers