213 lines
6.7 KiB
C
213 lines
6.7 KiB
C
#ifndef _HFI1_EXP_RCV_H
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#define _HFI1_EXP_RCV_H
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/*
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* Copyright(c) 2017 Intel Corporation.
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* BSD LICENSE
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* - Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "hfi.h"
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#define EXP_TID_SET_EMPTY(set) (set.count == 0 && list_empty(&set.list))
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#define EXP_TID_TIDLEN_MASK 0x7FFULL
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#define EXP_TID_TIDLEN_SHIFT 0
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#define EXP_TID_TIDCTRL_MASK 0x3ULL
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#define EXP_TID_TIDCTRL_SHIFT 20
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#define EXP_TID_TIDIDX_MASK 0x3FFULL
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#define EXP_TID_TIDIDX_SHIFT 22
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#define EXP_TID_GET(tid, field) \
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(((tid) >> EXP_TID_TID##field##_SHIFT) & EXP_TID_TID##field##_MASK)
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#define EXP_TID_SET(field, value) \
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(((value) & EXP_TID_TID##field##_MASK) << \
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EXP_TID_TID##field##_SHIFT)
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#define EXP_TID_CLEAR(tid, field) ({ \
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(tid) &= ~(EXP_TID_TID##field##_MASK << \
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EXP_TID_TID##field##_SHIFT); \
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})
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#define EXP_TID_RESET(tid, field, value) do { \
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EXP_TID_CLEAR(tid, field); \
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(tid) |= EXP_TID_SET(field, (value)); \
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} while (0)
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/*
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* Define fields in the KDETH header so we can update the header
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* template.
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*/
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#define KDETH_OFFSET_SHIFT 0
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#define KDETH_OFFSET_MASK 0x7fff
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#define KDETH_OM_SHIFT 15
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#define KDETH_OM_MASK 0x1
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#define KDETH_TID_SHIFT 16
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#define KDETH_TID_MASK 0x3ff
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#define KDETH_TIDCTRL_SHIFT 26
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#define KDETH_TIDCTRL_MASK 0x3
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#define KDETH_INTR_SHIFT 28
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#define KDETH_INTR_MASK 0x1
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#define KDETH_SH_SHIFT 29
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#define KDETH_SH_MASK 0x1
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#define KDETH_KVER_SHIFT 30
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#define KDETH_KVER_MASK 0x3
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#define KDETH_JKEY_SHIFT 0x0
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#define KDETH_JKEY_MASK 0xff
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#define KDETH_HCRC_UPPER_SHIFT 16
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#define KDETH_HCRC_UPPER_MASK 0xff
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#define KDETH_HCRC_LOWER_SHIFT 24
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#define KDETH_HCRC_LOWER_MASK 0xff
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#define KDETH_GET(val, field) \
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(((le32_to_cpu((val))) >> KDETH_##field##_SHIFT) & KDETH_##field##_MASK)
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#define KDETH_SET(dw, field, val) do { \
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u32 dwval = le32_to_cpu(dw); \
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dwval &= ~(KDETH_##field##_MASK << KDETH_##field##_SHIFT); \
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dwval |= (((val) & KDETH_##field##_MASK) << \
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KDETH_##field##_SHIFT); \
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dw = cpu_to_le32(dwval); \
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} while (0)
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#define KDETH_RESET(dw, field, val) ({ dw = 0; KDETH_SET(dw, field, val); })
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/* KDETH OM multipliers and switch over point */
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#define KDETH_OM_SMALL 4
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#define KDETH_OM_SMALL_SHIFT 2
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#define KDETH_OM_LARGE 64
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#define KDETH_OM_LARGE_SHIFT 6
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#define KDETH_OM_MAX_SIZE (1 << ((KDETH_OM_LARGE / KDETH_OM_SMALL) + 1))
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struct tid_group {
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struct list_head list;
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u32 base;
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u8 size;
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u8 used;
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u8 map;
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};
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/*
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* Write an "empty" RcvArray entry.
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* This function exists so the TID registaration code can use it
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* to write to unused/unneeded entries and still take advantage
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* of the WC performance improvements. The HFI will ignore this
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* write to the RcvArray entry.
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*/
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static inline void rcv_array_wc_fill(struct hfi1_devdata *dd, u32 index)
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{
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/*
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* Doing the WC fill writes only makes sense if the device is
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* present and the RcvArray has been mapped as WC memory.
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*/
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if ((dd->flags & HFI1_PRESENT) && dd->rcvarray_wc) {
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writeq(0, dd->rcvarray_wc + (index * 8));
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if ((index & 3) == 3)
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flush_wc();
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}
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}
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static inline void tid_group_add_tail(struct tid_group *grp,
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struct exp_tid_set *set)
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{
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list_add_tail(&grp->list, &set->list);
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set->count++;
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}
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static inline void tid_group_remove(struct tid_group *grp,
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struct exp_tid_set *set)
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{
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list_del_init(&grp->list);
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set->count--;
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}
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static inline void tid_group_move(struct tid_group *group,
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struct exp_tid_set *s1,
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struct exp_tid_set *s2)
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{
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tid_group_remove(group, s1);
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tid_group_add_tail(group, s2);
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}
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static inline struct tid_group *tid_group_pop(struct exp_tid_set *set)
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{
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struct tid_group *grp =
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list_first_entry(&set->list, struct tid_group, list);
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list_del_init(&grp->list);
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set->count--;
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return grp;
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}
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static inline u32 rcventry2tidinfo(u32 rcventry)
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{
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u32 pair = rcventry & ~0x1;
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return EXP_TID_SET(IDX, pair >> 1) |
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EXP_TID_SET(CTRL, 1 << (rcventry - pair));
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}
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/**
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* hfi1_tid_group_to_idx - convert an index to a group
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* @rcd - the receive context
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* @grp - the group pointer
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*/
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static inline u16
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hfi1_tid_group_to_idx(struct hfi1_ctxtdata *rcd, struct tid_group *grp)
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{
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return grp - &rcd->groups[0];
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}
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/**
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* hfi1_idx_to_tid_group - convert a group to an index
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* @rcd - the receive context
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* @idx - the index
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*/
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static inline struct tid_group *
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hfi1_idx_to_tid_group(struct hfi1_ctxtdata *rcd, u16 idx)
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{
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return &rcd->groups[idx];
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}
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int hfi1_alloc_ctxt_rcv_groups(struct hfi1_ctxtdata *rcd);
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void hfi1_free_ctxt_rcv_groups(struct hfi1_ctxtdata *rcd);
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void hfi1_exp_tid_group_init(struct hfi1_ctxtdata *rcd);
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#endif /* _HFI1_EXP_RCV_H */
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