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IB/ipath: layering interfaces used by higher-level driver code
The layering interfaces are used to implement the Infiniband protocols and the ethernet emulation driver. Signed-off-by: Bryan O'Sullivan <bos@pathscale.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
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Bryan O'Sullivan
Roland Dreier
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/*
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* Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef _IPATH_LAYER_H
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#define _IPATH_LAYER_H
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/*
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* This header file is for symbols shared between the infinipath driver
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* and drivers layered upon it (such as ipath).
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*/
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struct sk_buff;
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struct ipath_sge_state;
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struct ipath_devdata;
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struct ether_header;
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struct ipath_layer_counters {
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u64 symbol_error_counter;
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u64 link_error_recovery_counter;
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u64 link_downed_counter;
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u64 port_rcv_errors;
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u64 port_rcv_remphys_errors;
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u64 port_xmit_discards;
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u64 port_xmit_data;
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u64 port_rcv_data;
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u64 port_xmit_packets;
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u64 port_rcv_packets;
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};
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/*
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* A segment is a linear region of low physical memory.
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* XXX Maybe we should use phys addr here and kmap()/kunmap().
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* Used by the verbs layer.
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*/
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struct ipath_seg {
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void *vaddr;
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size_t length;
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};
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/* The number of ipath_segs that fit in a page. */
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#define IPATH_SEGSZ (PAGE_SIZE / sizeof (struct ipath_seg))
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struct ipath_segarray {
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struct ipath_seg segs[IPATH_SEGSZ];
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};
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struct ipath_mregion {
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u64 user_base; /* User's address for this region */
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u64 iova; /* IB start address of this region */
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size_t length;
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u32 lkey;
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u32 offset; /* offset (bytes) to start of region */
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int access_flags;
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u32 max_segs; /* number of ipath_segs in all the arrays */
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u32 mapsz; /* size of the map array */
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struct ipath_segarray *map[0]; /* the segments */
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};
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/*
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* These keep track of the copy progress within a memory region.
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* Used by the verbs layer.
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*/
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struct ipath_sge {
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struct ipath_mregion *mr;
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void *vaddr; /* current pointer into the segment */
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u32 sge_length; /* length of the SGE */
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u32 length; /* remaining length of the segment */
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u16 m; /* current index: mr->map[m] */
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u16 n; /* current index: mr->map[m]->segs[n] */
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};
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struct ipath_sge_state {
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struct ipath_sge *sg_list; /* next SGE to be used if any */
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struct ipath_sge sge; /* progress state for the current SGE */
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u8 num_sge;
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};
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int ipath_layer_register(void *(*l_add)(int, struct ipath_devdata *),
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void (*l_remove)(void *),
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int (*l_intr)(void *, u32),
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int (*l_rcv)(void *, void *,
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struct sk_buff *),
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u16 rcv_opcode,
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int (*l_rcv_lid)(void *, void *));
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int ipath_verbs_register(void *(*l_add)(int, struct ipath_devdata *),
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void (*l_remove)(void *arg),
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int (*l_piobufavail)(void *arg),
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void (*l_rcv)(void *arg, void *rhdr,
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void *data, u32 tlen),
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void (*l_timer_cb)(void *arg));
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void ipath_layer_unregister(void);
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void ipath_verbs_unregister(void);
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int ipath_layer_open(struct ipath_devdata *, u32 * pktmax);
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u16 ipath_layer_get_lid(struct ipath_devdata *dd);
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int ipath_layer_get_mac(struct ipath_devdata *dd, u8 *);
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u16 ipath_layer_get_bcast(struct ipath_devdata *dd);
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u32 ipath_layer_get_cr_errpkey(struct ipath_devdata *dd);
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int ipath_layer_set_linkstate(struct ipath_devdata *dd, u8 state);
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int ipath_layer_set_mtu(struct ipath_devdata *, u16);
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int ipath_set_sps_lid(struct ipath_devdata *, u32, u8);
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int ipath_layer_send_hdr(struct ipath_devdata *dd,
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struct ether_header *hdr);
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int ipath_verbs_send(struct ipath_devdata *dd, u32 hdrwords,
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u32 * hdr, u32 len, struct ipath_sge_state *ss);
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int ipath_layer_set_piointbufavail_int(struct ipath_devdata *dd);
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int ipath_layer_get_boardname(struct ipath_devdata *dd, char *name,
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size_t namelen);
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int ipath_layer_snapshot_counters(struct ipath_devdata *dd, u64 *swords,
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u64 *rwords, u64 *spkts, u64 *rpkts,
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u64 *xmit_wait);
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int ipath_layer_get_counters(struct ipath_devdata *dd,
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struct ipath_layer_counters *cntrs);
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int ipath_layer_want_buffer(struct ipath_devdata *dd);
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int ipath_layer_set_guid(struct ipath_devdata *, __be64 guid);
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__be64 ipath_layer_get_guid(struct ipath_devdata *);
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u32 ipath_layer_get_nguid(struct ipath_devdata *);
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int ipath_layer_query_device(struct ipath_devdata *, u32 * vendor,
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u32 * boardrev, u32 * majrev, u32 * minrev);
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u32 ipath_layer_get_flags(struct ipath_devdata *dd);
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struct device *ipath_layer_get_device(struct ipath_devdata *dd);
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u16 ipath_layer_get_deviceid(struct ipath_devdata *dd);
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u64 ipath_layer_get_lastibcstat(struct ipath_devdata *dd);
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u32 ipath_layer_get_ibmtu(struct ipath_devdata *dd);
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int ipath_layer_enable_timer(struct ipath_devdata *dd);
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int ipath_layer_disable_timer(struct ipath_devdata *dd);
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int ipath_layer_set_verbs_flags(struct ipath_devdata *dd, unsigned flags);
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unsigned ipath_layer_get_npkeys(struct ipath_devdata *dd);
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unsigned ipath_layer_get_pkey(struct ipath_devdata *dd, unsigned index);
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int ipath_layer_get_pkeys(struct ipath_devdata *dd, u16 *pkeys);
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int ipath_layer_set_pkeys(struct ipath_devdata *dd, u16 *pkeys);
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int ipath_layer_get_linkdowndefaultstate(struct ipath_devdata *dd);
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int ipath_layer_set_linkdowndefaultstate(struct ipath_devdata *dd,
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int sleep);
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int ipath_layer_get_phyerrthreshold(struct ipath_devdata *dd);
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int ipath_layer_set_phyerrthreshold(struct ipath_devdata *dd, unsigned n);
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int ipath_layer_get_overrunthreshold(struct ipath_devdata *dd);
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int ipath_layer_set_overrunthreshold(struct ipath_devdata *dd, unsigned n);
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u32 ipath_layer_get_rcvhdrentsize(struct ipath_devdata *dd);
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/* ipath_ether interrupt values */
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#define IPATH_LAYER_INT_IF_UP 0x2
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#define IPATH_LAYER_INT_IF_DOWN 0x4
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#define IPATH_LAYER_INT_LID 0x8
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#define IPATH_LAYER_INT_SEND_CONTINUE 0x10
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#define IPATH_LAYER_INT_BCAST 0x40
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/* _verbs_layer.l_flags */
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#define IPATH_VERBS_KERNEL_SMA 0x1
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extern unsigned ipath_debug; /* debugging bit mask */
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#endif /* _IPATH_LAYER_H */
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