drivers/infiniband/hw/hfi1/exp_rcv.h - linux - Git at Google

 #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 */
	#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 */