path: root/drivers/infiniband/hw/qib/qib.h

#ifndef _QIB_KERNEL_H
#define _QIB_KERNEL_H
/*
 * Copyright (c) 2012 - 2017 Intel Corporation.  All rights reserved.
 * Copyright (c) 2006 - 2012 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 qlogic_ib kernel code
 * qib_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 <linux/slab.h>
#include <linux/io.h>
#include <linux/fs.h>
#include <linux/completion.h>
#include <linux/kref.h>
#include <linux/sched.h>
#include <linux/kthread.h>
#include <rdma/ib_hdrs.h>
#include <rdma/rdma_vt.h>

#include "qib_common.h"
#include "qib_verbs.h"

/* only s/w major version of QLogic_IB we can handle */
#define QIB_CHIP_VERS_MAJ 2U

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

/* The Organization Unique Identifier (Mfg code), and its position in GUID */
#define QIB_OUI 0x001175
#define QIB_OUI_LSB 40

/*
 * per driver stats, either not device nor port-specific, or
 * summed over all of the devices and ports.
 * They are described by name via ipathfs filesystem, so layout
 * and number of elements can change without breaking compatibility.
 * If members are added or deleted qib_statnames[] in qib_fs.c must
 * change to match.
 */
struct qlogic_ib_stats {
	__u64 sps_ints; /* number of interrupts handled */
	__u64 sps_errints; /* number of error interrupts */
	__u64 sps_txerrs; /* tx-related packet errors */
	__u64 sps_rcverrs; /* non-crc rcv packet errors */
	__u64 sps_hwerrs; /* hardware errors reported (parity, etc.) */
	__u64 sps_nopiobufs; /* no pio bufs avail from kernel */
	__u64 sps_ctxts; /* number of contexts currently open */
	__u64 sps_lenerrs; /* number of kernel packets where RHF != LRH len */
	__u64 sps_buffull;
	__u64 sps_hdrfull;
};

extern struct qlogic_ib_stats qib_stats;
extern const struct pci_error_handlers qib_pci_err_handler;

#define QIB_CHIP_SWVERSION QIB_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 QIB_TRAFFIC_ACTIVE_THRESHOLD (2000)

/*
 * Below contains all data related to a single context (formerly called port).
 */

#ifdef CONFIG_DEBUG_FS
struct qib_opcode_stats_perctx;
#endif

struct qib_ctxtdata {
	void **rcvegrbuf;
	dma_addr_t *rcvegrbuf_phys;
	/* rcvhdrq base, needs mmap before useful */
	void *rcvhdrq;
	/* kernel virtual address where hdrqtail is updated */
	void *rcvhdrtail_kvaddr;
	/*
	 * temp buffer for expected send setup, allocated at open, instead
	 * of each setup call
	 */
	void *tid_pg_list;
	/*
	 * Shared page for kernel to signal user processes that send buffers
	 * need disarming.  The process should call QIB_CMD_DISARM_BUFS
	 * or QIB_CMD_ACK_EVENT with IPATH_EVENT_DISARM_BUFS set.
	 */
	unsigned long *user_event_mask;
	/* when waiting for rcv or pioavail */
	wait_queue_head_t wait;
	/*
	 * rcvegr bufs base, physical, must fit
	 * in 44 bits so 32 bit programs mmap64 44 bit works)
	 */
	dma_addr_t rcvegr_phys;
	/* mmap of hdrq, must fit in 44 bits */
	dma_addr_t rcvhdrq_phys;
	dma_addr_t rcvhdrqtailaddr_phys;

	/*
	 * number of opens (including slave sub-contexts) on this instance
	 * (ignoring forks, dup, etc. for now)
	 */
	int cnt;
	/*
	 * how much space to leave at start of eager TID entries for
	 * protocol use, on each TID
	 */
	/* instead of calculating it */
	unsigned ctxt;
	/* local node of context */
	int node_id;
	/* non-zero if ctxt is being shared. */
	u16 subctxt_cnt;
	/* non-zero if ctxt is being shared. */
	u16 subctxt_id;
	/* number of eager TID entries. */
	u16 rcvegrcnt;
	/* index of first eager TID entry. */
	u16 rcvegr_tid_base;
	/* number of pio bufs for this ctxt (all procs, if shared) */
	u32 piocnt;
	/* first pio buffer for this ctxt */
	u32 pio_base;
	/* chip offset of PIO buffers for this ctxt */
	u32 piobufs;
	/* how many alloc_pages() chunks in rcvegrbuf_pages */
	u32 rcvegrbuf_chunks;
	/* how many egrbufs per chunk */
	u16 rcvegrbufs_perchunk;
	/* ilog2 of above */
	u16 rcvegrbufs_perchunk_shift;
	/* order for rcvegrbuf_pages */
	size_t rcvegrbuf_size;
	/* rcvhdrq size (for freeing) */
	size_t rcvhdrq_size;
	/* per-context flags for fileops/intr communication */
	unsigned long flag;
	/* next expected TID to check when looking for free */
	u32 tidcursor;
	/* WAIT_RCV that timed out, no interrupt */
	u32 rcvwait_to;
	/* WAIT_PIO that timed out, no interrupt */
	u32 piowait_to;
	/* WAIT_RCV already happened, no wait */
	u32 rcvnowait;
	/* WAIT_PIO already happened, no wait */
	u32 pionowait;
	/* total number of polled urgent packets */
	u32 urgent;
	/* saved total number of polled urgent packets for poll edge trigger */
	u32 urgent_poll;
	/* pid of process using this ctxt */
	pid_t pid;
	pid_t subpid[QLOGIC_IB_MAX_SUBCTXT];
	/* same size as task_struct .comm[], command that opened context */
	char comm[16];
	/* pkeys set by this use of this ctxt */
	u16 pkeys[4];
	/* so file ops can get at unit */
	struct qib_devdata *dd;
	/* so funcs that need physical port can get it easily */
	struct qib_pportdata *ppd;
	/* A page of memory for rcvhdrhead, rcvegrhead, rcvegrtail * N */
	void *subctxt_uregbase;
	/* An array of pages for the eager receive buffers * N */
	void *subctxt_rcvegrbuf;
	/* An array of pages for the eager header queue entries * N */
	void *subctxt_rcvhdr_base;
	/* The version of the library which opened this ctxt */
	u32 userversion;
	/* Bitmask of active slaves */
	u32 active_slaves;
	/* Type of packets or conditions we want to poll for */
	u16 poll_type;
	/* receive packet sequence counter */
	u8 seq_cnt;
	u8 redirect_seq_cnt;
	/* ctxt rcvhdrq head offset */
	u32 head;
	/* QPs waiting for context processing */
	struct list_head qp_wait_list;
#ifdef CONFIG_DEBUG_FS
	/* verbs sta