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