drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c - linux - Git at Google

 /*
  * drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c
  * Copyright (c) 2015 Mellanox Technologies. All rights reserved.
  * Copyright (c) 2015 Jiri Pirko <jiri@mellanox.com>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. 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.
  * 3. Neither the names of the copyright holders nor the names of its
  *    contributors may be used to endorse or promote products derived from
  *    this software without specific prior written permission.
  *
  * Alternatively, this software may be distributed under the terms of the
  * GNU General Public License ("GPL") version 2 as published by the Free
  * Software Foundation.
  *
  * 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 <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/dcbnl.h>
 #include <linux/if_ether.h>

 #include "spectrum.h"
 #include "core.h"
 #include "port.h"
 #include "reg.h"

 struct mlxsw_sp_pb {
 	u8 index;
 	u16 size;
 };

 #define MLXSW_SP_PB(_index, _size)	\
 	{				\
 		.index = _index,	\
 		.size = _size,		\
 	}

 static const struct mlxsw_sp_pb mlxsw_sp_pbs[] = {
 	MLXSW_SP_PB(0, 2 * MLXSW_SP_BYTES_TO_CELLS(ETH_FRAME_LEN)),
 	MLXSW_SP_PB(1, 0),
 	MLXSW_SP_PB(2, 0),
 	MLXSW_SP_PB(3, 0),
 	MLXSW_SP_PB(4, 0),
 	MLXSW_SP_PB(5, 0),
 	MLXSW_SP_PB(6, 0),
 	MLXSW_SP_PB(7, 0),
 	MLXSW_SP_PB(9, 2 * MLXSW_SP_BYTES_TO_CELLS(MLXSW_PORT_MAX_MTU)),
 };

 #define MLXSW_SP_PBS_LEN ARRAY_SIZE(mlxsw_sp_pbs)

 static int mlxsw_sp_port_pb_init(struct mlxsw_sp_port *mlxsw_sp_port)
 {
 	char pbmc_pl[MLXSW_REG_PBMC_LEN];
 	int i;

 	mlxsw_reg_pbmc_pack(pbmc_pl, mlxsw_sp_port->local_port,
 			    0xffff, 0xffff / 2);
 	for (i = 0; i < MLXSW_SP_PBS_LEN; i++) {
 		const struct mlxsw_sp_pb *pb;

 		pb = &mlxsw_sp_pbs[i];
 		mlxsw_reg_pbmc_lossy_buffer_pack(pbmc_pl, pb->index, pb->size);
 	}
 	mlxsw_reg_pbmc_lossy_buffer_pack(pbmc_pl,
 					 MLXSW_REG_PBMC_PORT_SHARED_BUF_IDX, 0);
 	return mlxsw_reg_write(mlxsw_sp_port->mlxsw_sp->core,
 			       MLXSW_REG(pbmc), pbmc_pl);
 }

 static int mlxsw_sp_port_pb_prio_init(struct mlxsw_sp_port *mlxsw_sp_port)
 {
 	char pptb_pl[MLXSW_REG_PPTB_LEN];
 	int i;

 	mlxsw_reg_pptb_pack(pptb_pl, mlxsw_sp_port->local_port);
 	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
 		mlxsw_reg_pptb_prio_to_buff_set(pptb_pl, i, 0);
 	return mlxsw_reg_write(mlxsw_sp_port->mlxsw_sp->core, MLXSW_REG(pptb),
 			       pptb_pl);
 }

 static int mlxsw_sp_port_headroom_init(struct mlxsw_sp_port *mlxsw_sp_port)
 {
 	int err;

 	err = mlxsw_sp_port_pb_init(mlxsw_sp_port);
 	if (err)
 		return err;
 	return mlxsw_sp_port_pb_prio_init(mlxsw_sp_port);
 }

 struct mlxsw_sp_sb_pool {
 	u8 pool;
 	enum mlxsw_reg_sbxx_dir dir;
 	enum mlxsw_reg_sbpr_mode mode;
 	u32 size;
 };

 #define MLXSW_SP_SB_POOL_INGRESS_SIZE				\
 	(15000000 - (2 * 20000 * MLXSW_PORT_MAX_PORTS))
 #define MLXSW_SP_SB_POOL_EGRESS_SIZE				\
 	(14000000 - (8 * 1500 * MLXSW_PORT_MAX_PORTS))

 #define MLXSW_SP_SB_POOL(_pool, _dir, _mode, _size)		\
 	{							\
 		.pool = _pool,					\
 		.dir = _dir,					\
 		.mode = _mode,					\
 		.size = _size,					\
 	}

 #define MLXSW_SP_SB_POOL_INGRESS(_pool, _size)			\
 	MLXSW_SP_SB_POOL(_pool, MLXSW_REG_SBXX_DIR_INGRESS,	\
 			 MLXSW_REG_SBPR_MODE_DYNAMIC, _size)

 #define MLXSW_SP_SB_POOL_EGRESS(_pool, _size)			\
 	MLXSW_SP_SB_POOL(_pool, MLXSW_REG_SBXX_DIR_EGRESS,	\
 			 MLXSW_REG_SBPR_MODE_DYNAMIC, _size)

 static const struct mlxsw_sp_sb_pool mlxsw_sp_sb_pools[] = {
 	MLXSW_SP_SB_POOL_INGRESS(0, MLXSW_SP_BYTES_TO_CELLS(MLXSW_SP_SB_POOL_INGRESS_SIZE)),
 	MLXSW_SP_SB_POOL_INGRESS(1, 0),
 	MLXSW_SP_SB_POOL_INGRESS(2, 0),
 	MLXSW_SP_SB_POOL_INGRESS(3, 0),
 	MLXSW_SP_SB_POOL_EGRESS(0, MLXSW_SP_BYTES_TO_CELLS(MLXSW_SP_SB_POOL_EGRESS_SIZE)),
 	MLXSW_SP_SB_POOL_EGRESS(1, 0),
 	MLXSW_SP_SB_POOL_EGRESS(2, 0),
 	MLXSW_SP_SB_POOL_EGRESS(2, MLXSW_SP_BYTES_TO_CELLS(MLXSW_SP_SB_POOL_EGRESS_SIZE)),
 };

 #define MLXSW_SP_SB_POOLS_LEN ARRAY_SIZE(mlxsw_sp_sb_pools)

 static int mlxsw_sp_sb_pools_init(struct mlxsw_sp *mlxsw_sp)
 {
 	char sbpr_pl[MLXSW_REG_SBPR_LEN];
 	int i;
 	int err;

 	for (i = 0; i < MLXSW_SP_SB_POOLS_LEN; i++) {
 		const struct mlxsw_sp_sb_pool *pool;

 		pool = &mlxsw_sp_sb_pools[i];
 		mlxsw_reg_sbpr_pack(sbpr_pl, pool->pool, pool->dir,
 				    pool->mode, pool->size);
 		err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sbpr), sbpr_pl);
 		if (err)
 			return err;
 	}
 	return 0;
 }

 struct mlxsw_sp_sb_cm {
 	union {
 		u8 pg;
 		u8 tc;
 	} u;
 	enum mlxsw_reg_sbxx_dir dir;
 	u32 min_buff;
 	u32 max_buff;
 	u8 pool;
 };

 #define MLXSW_SP_SB_CM(_pg_tc, _dir, _min_buff, _max_buff, _pool)	\
 	{								\
 		.u.pg = _pg_tc,						\
 		.dir = _dir,						\
 		.min_buff = _min_buff,					\
 		.max_buff = _max_buff,					\
 		.pool = _pool,						\
 	}

 #define MLXSW_SP_SB_CM_INGRESS(_pg, _min_buff, _max_buff)		\
 	MLXSW_SP_SB_CM(_pg, MLXSW_REG_SBXX_DIR_INGRESS,			\
 		       _min_buff, _max_buff, 0)

 #define MLXSW_SP_SB_CM_EGRESS(_tc, _min_buff, _max_buff)		\
 	MLXSW_SP_SB_CM(_tc, MLXSW_REG_SBXX_DIR_EGRESS,			\
 		       _min_buff, _max_buff, 0)

 #define MLXSW_SP_CPU_PORT_SB_CM_EGRESS(_tc)				\
 	MLXSW_SP_SB_CM(_tc, MLXSW_REG_SBXX_DIR_EGRESS, 104, 2, 3)

 static const struct mlxsw_sp_sb_cm mlxsw_sp_sb_cms[] = {
 	MLXSW_SP_SB_CM_INGRESS(0, MLXSW_SP_BYTES_TO_CELLS(10000), 8),
 	MLXSW_SP_SB_CM_INGRESS(1, 0, 0),
 	MLXSW_SP_SB_CM_INGRESS(2, 0, 0),
 	MLXSW_SP_SB_CM_INGRESS(3, 0, 0),
 	MLXSW_SP_SB_CM_INGRESS(4, 0, 0),
 	MLXSW_SP_SB_CM_INGRESS(5, 0, 0),
 	MLXSW_SP_SB_CM_INGRESS(6, 0, 0),
 	MLXSW_SP_SB_CM_INGRESS(7, 0, 0),
 	MLXSW_SP_SB_CM_INGRESS(9, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff),
 	MLXSW_SP_SB_CM_EGRESS(0, MLXSW_SP_BYTES_TO_CELLS(1500), 9),
 	MLXSW_SP_SB_CM_EGRESS(1, MLXSW_SP_BYTES_TO_CELLS(1500), 9),
 	MLXSW_SP_SB_CM_EGRESS(2, MLXSW_SP_BYTES_TO_CELLS(1500), 9),
 	MLXSW_SP_SB_CM_EGRESS(3, MLXSW_SP_BYTES_TO_CELLS(1500), 9),
 	MLXSW_SP_SB_CM_EGRESS(4, MLXSW_SP_BYTES_TO_CELLS(1500), 9),
 	MLXSW_SP_SB_CM_EGRESS(5, MLXSW_SP_BYTES_TO_CELLS(1500), 9),
 	MLXSW_SP_SB_CM_EGRESS(6, MLXSW_SP_BYTES_TO_CELLS(1500), 9),
 	MLXSW_SP_SB_CM_EGRESS(7, MLXSW_SP_BYTES_TO_CELLS(1500), 9),
 	MLXSW_SP_SB_CM_EGRESS(8, 0, 0),
 	MLXSW_SP_SB_CM_EGRESS(9, 0, 0),
 	MLXSW_SP_SB_CM_EGRESS(10, 0, 0),
 	MLXSW_SP_SB_CM_EGRESS(11, 0, 0),
 	MLXSW_SP_SB_CM_EGRESS(12, 0, 0),
 	MLXSW_SP_SB_CM_EGRESS(13, 0, 0),
 	MLXSW_SP_SB_CM_EGRESS(14, 0, 0),
 	MLXSW_SP_SB_CM_EGRESS(15, 0, 0),
 	MLXSW_SP_SB_CM_EGRESS(16, 1, 0xff),
 };

 #define MLXSW_SP_SB_CMS_LEN ARRAY_SIZE(mlxsw_sp_sb_cms)

 static const struct mlxsw_sp_sb_cm mlxsw_sp_cpu_port_sb_cms[] = {
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(0),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(1),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(2),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(3),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(4),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(5),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(6),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(7),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(8),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(9),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(10),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(11),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(12),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(13),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(14),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(15),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(16),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(17),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(18),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(19),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(20),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(21),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(22),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(23),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(24),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(25),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(26),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(27),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(28),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(29),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(30),
 	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(31),
 };

 #define MLXSW_SP_CPU_PORT_SB_MCS_LEN \
 	ARRAY_SIZE(mlxsw_sp_cpu_port_sb_cms)

 static int mlxsw_sp_sb_cms_init(struct mlxsw_sp *mlxsw_sp, u8 local_port,
 				const struct mlxsw_sp_sb_cm *cms,
 				size_t cms_len)
 {
 	char sbcm_pl[MLXSW_REG_SBCM_LEN];
 	int i;
 	int err;

 	for (i = 0; i < cms_len; i++) {
 		const struct mlxsw_sp_sb_cm *cm;

 		cm = &cms[i];
 		mlxsw_reg_sbcm_pack(sbcm_pl, local_port, cm->u.pg, cm->dir,
 				    cm->min_buff, cm->max_buff, cm->pool);
 		err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sbcm), sbcm_pl);
 		if (err)
 			return err;
 	}
 	return 0;
 }

 static int mlxsw_sp_port_sb_cms_init(struct mlxsw_sp_port *mlxsw_sp_port)
 {
 	return mlxsw_sp_sb_cms_init(mlxsw_sp_port->mlxsw_sp,
 				    mlxsw_sp_port->local_port, mlxsw_sp_sb_cms,
 				    MLXSW_SP_SB_CMS_LEN);
 }

 static int mlxsw_sp_cpu_port_sb_cms_init(struct mlxsw_sp *mlxsw_sp)
 {
 	return mlxsw_sp_sb_cms_init(mlxsw_sp, 0, mlxsw_sp_cpu_port_sb_cms,
 				    MLXSW_SP_CPU_PORT_SB_MCS_LEN);
 }

 struct mlxsw_sp_sb_pm {
 	u8 pool;
 	enum mlxsw_reg_sbxx_dir dir;
 	u32 min_buff;
 	u32 max_buff;
 };

 #define MLXSW_SP_SB_PM(_pool, _dir, _min_buff, _max_buff)	\
 	{							\
 		.pool = _pool,					\
 		.dir = _dir,					\
 		.min_buff = _min_buff,				\
 		.max_buff = _max_buff,				\
 	}

 #define MLXSW_SP_SB_PM_INGRESS(_pool, _min_buff, _max_buff)	\
 	MLXSW_SP_SB_PM(_pool, MLXSW_REG_SBXX_DIR_INGRESS,	\
 		       _min_buff, _max_buff)

 #define MLXSW_SP_SB_PM_EGRESS(_pool, _min_buff, _max_buff)	\
 	MLXSW_SP_SB_PM(_pool, MLXSW_REG_SBXX_DIR_EGRESS,	\
 		       _min_buff, _max_buff)

 static const struct mlxsw_sp_sb_pm mlxsw_sp_sb_pms[] = {
 	MLXSW_SP_SB_PM_INGRESS(0, 0, 0xff),
 	MLXSW_SP_SB_PM_INGRESS(1, 0, 0),
 	MLXSW_SP_SB_PM_INGRESS(2, 0, 0),
 	MLXSW_SP_SB_PM_INGRESS(3, 0, 0),
 	MLXSW_SP_SB_PM_EGRESS(0, 0, 7),
 	MLXSW_SP_SB_PM_EGRESS(1, 0, 0),
 	MLXSW_SP_SB_PM_EGRESS(2, 0, 0),
 	MLXSW_SP_SB_PM_EGRESS(3, 0, 0),
 };

 #define MLXSW_SP_SB_PMS_LEN ARRAY_SIZE(mlxsw_sp_sb_pms)

 static int mlxsw_sp_port_sb_pms_init(struct mlxsw_sp_port *mlxsw_sp_port)
 {
 	char sbpm_pl[MLXSW_REG_SBPM_LEN];
 	int i;
 	int err;

 	for (i = 0; i < MLXSW_SP_SB_PMS_LEN; i++) {
 		const struct mlxsw_sp_sb_pm *pm;

 		pm = &mlxsw_sp_sb_pms[i];
 		mlxsw_reg_sbpm_pack(sbpm_pl, mlxsw_sp_port->local_port,
 				    pm->pool, pm->dir,
 				    pm->min_buff, pm->max_buff);
 		err = mlxsw_reg_write(mlxsw_sp_port->mlxsw_sp->core,
 				      MLXSW_REG(sbpm), sbpm_pl);
 		if (err)
 			return err;
 	}
 	return 0;
 }

 struct mlxsw_sp_sb_mm {
 	u8 prio;
 	u32 min_buff;
 	u32 max_buff;
 	u8 pool;
 };

 #define MLXSW_SP_SB_MM(_prio, _min_buff, _max_buff, _pool)	\
 	{							\
 		.prio = _prio,					\
 		.min_buff = _min_buff,				\
 		.max_buff = _max_buff,				\
 		.pool = _pool,					\
 	}

 static const struct mlxsw_sp_sb_mm mlxsw_sp_sb_mms[] = {
 	MLXSW_SP_SB_MM(0, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
 	MLXSW_SP_SB_MM(1, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
 	MLXSW_SP_SB_MM(2, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
 	MLXSW_SP_SB_MM(3, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
 	MLXSW_SP_SB_MM(4, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
 	MLXSW_SP_SB_MM(5, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
 	MLXSW_SP_SB_MM(6, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
 	MLXSW_SP_SB_MM(7, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
 	MLXSW_SP_SB_MM(8, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
 	MLXSW_SP_SB_MM(9, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
 	MLXSW_SP_SB_MM(10, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
 	MLXSW_SP_SB_MM(11, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
 	MLXSW_SP_SB_MM(12, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
 	MLXSW_SP_SB_MM(13, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
 	MLXSW_SP_SB_MM(14, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
 };

 #define MLXSW_SP_SB_MMS_LEN ARRAY_SIZE(mlxsw_sp_sb_mms)

 static int mlxsw_sp_sb_mms_init(struct mlxsw_sp *mlxsw_sp)
 {
 	char sbmm_pl[MLXSW_REG_SBMM_LEN];
 	int i;
 	int err;

 	for (i = 0; i < MLXSW_SP_SB_MMS_LEN; i++) {
 		const struct mlxsw_sp_sb_mm *mc;

 		mc = &mlxsw_sp_sb_mms[i];
 		mlxsw_reg_sbmm_pack(sbmm_pl, mc->prio, mc->min_buff,
 				    mc->max_buff, mc->pool);
 		err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sbmm), sbmm_pl);
 		if (err)
 			return err;
 	}
 	return 0;
 }

 int mlxsw_sp_buffers_init(struct mlxsw_sp *mlxsw_sp)
 {
 	int err;

 	err = mlxsw_sp_sb_pools_init(mlxsw_sp);
 	if (err)
 		return err;
 	err = mlxsw_sp_cpu_port_sb_cms_init(mlxsw_sp);
 	if (err)
 		return err;
 	err = mlxsw_sp_sb_mms_init(mlxsw_sp);

 	return err;
 }

 int mlxsw_sp_port_buffers_init(struct mlxsw_sp_port *mlxsw_sp_port)
 {
 	int err;

 	err = mlxsw_sp_port_headroom_init(mlxsw_sp_port);
 	if (err)
 		return err;
 	err = mlxsw_sp_port_sb_cms_init(mlxsw_sp_port);
 	if (err)
 		return err;
 	err = mlxsw_sp_port_sb_pms_init(mlxsw_sp_port);

 	return err;
 }
	/*
	* drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c
	* Copyright (c) 2015 Mellanox Technologies. All rights reserved.
	* Copyright (c) 2015 Jiri Pirko <jiri@mellanox.com>
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are met:
	*
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. 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.
	* 3. Neither the names of the copyright holders nor the names of its
	* contributors may be used to endorse or promote products derived from
	* this software without specific prior written permission.
	*
	* Alternatively, this software may be distributed under the terms of the
	* GNU General Public License ("GPL") version 2 as published by the Free
	* Software Foundation.
	*
	* 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 <linux/kernel.h>
	#include <linux/types.h>
	#include <linux/dcbnl.h>
	#include <linux/if_ether.h>

	#include "spectrum.h"
	#include "core.h"
	#include "port.h"
	#include "reg.h"

	struct mlxsw_sp_pb {
	u8 index;
	u16 size;
	};

	#define MLXSW_SP_PB(_index, _size) \
	{ \
	.index = _index, \
	.size = _size, \
	}

	static const struct mlxsw_sp_pb mlxsw_sp_pbs[] = {
	MLXSW_SP_PB(0, 2 * MLXSW_SP_BYTES_TO_CELLS(ETH_FRAME_LEN)),
	MLXSW_SP_PB(1, 0),
	MLXSW_SP_PB(2, 0),
	MLXSW_SP_PB(3, 0),
	MLXSW_SP_PB(4, 0),
	MLXSW_SP_PB(5, 0),
	MLXSW_SP_PB(6, 0),
	MLXSW_SP_PB(7, 0),
	MLXSW_SP_PB(9, 2 * MLXSW_SP_BYTES_TO_CELLS(MLXSW_PORT_MAX_MTU)),
	};

	#define MLXSW_SP_PBS_LEN ARRAY_SIZE(mlxsw_sp_pbs)

	static int mlxsw_sp_port_pb_init(struct mlxsw_sp_port *mlxsw_sp_port)
	{
	char pbmc_pl[MLXSW_REG_PBMC_LEN];
	int i;

	mlxsw_reg_pbmc_pack(pbmc_pl, mlxsw_sp_port->local_port,
	0xffff, 0xffff / 2);
	for (i = 0; i < MLXSW_SP_PBS_LEN; i++) {
	const struct mlxsw_sp_pb *pb;

	pb = &mlxsw_sp_pbs[i];
	mlxsw_reg_pbmc_lossy_buffer_pack(pbmc_pl, pb->index, pb->size);
	}
	mlxsw_reg_pbmc_lossy_buffer_pack(pbmc_pl,
	MLXSW_REG_PBMC_PORT_SHARED_BUF_IDX, 0);
	return mlxsw_reg_write(mlxsw_sp_port->mlxsw_sp->core,
	MLXSW_REG(pbmc), pbmc_pl);
	}

	static int mlxsw_sp_port_pb_prio_init(struct mlxsw_sp_port *mlxsw_sp_port)
	{
	char pptb_pl[MLXSW_REG_PPTB_LEN];
	int i;

	mlxsw_reg_pptb_pack(pptb_pl, mlxsw_sp_port->local_port);
	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
	mlxsw_reg_pptb_prio_to_buff_set(pptb_pl, i, 0);
	return mlxsw_reg_write(mlxsw_sp_port->mlxsw_sp->core, MLXSW_REG(pptb),
	pptb_pl);
	}

	static int mlxsw_sp_port_headroom_init(struct mlxsw_sp_port *mlxsw_sp_port)
	{
	int err;

	err = mlxsw_sp_port_pb_init(mlxsw_sp_port);
	if (err)
	return err;
	return mlxsw_sp_port_pb_prio_init(mlxsw_sp_port);
	}

	struct mlxsw_sp_sb_pool {
	u8 pool;
	enum mlxsw_reg_sbxx_dir dir;
	enum mlxsw_reg_sbpr_mode mode;
	u32 size;
	};

	#define MLXSW_SP_SB_POOL_INGRESS_SIZE \
	(15000000 - (2 * 20000 * MLXSW_PORT_MAX_PORTS))
	#define MLXSW_SP_SB_POOL_EGRESS_SIZE \
	(14000000 - (8 * 1500 * MLXSW_PORT_MAX_PORTS))

	#define MLXSW_SP_SB_POOL(_pool, _dir, _mode, _size) \
	{ \
	.pool = _pool, \
	.dir = _dir, \
	.mode = _mode, \
	.size = _size, \
	}

	#define MLXSW_SP_SB_POOL_INGRESS(_pool, _size) \
	MLXSW_SP_SB_POOL(_pool, MLXSW_REG_SBXX_DIR_INGRESS, \
	MLXSW_REG_SBPR_MODE_DYNAMIC, _size)

	#define MLXSW_SP_SB_POOL_EGRESS(_pool, _size) \
	MLXSW_SP_SB_POOL(_pool, MLXSW_REG_SBXX_DIR_EGRESS, \
	MLXSW_REG_SBPR_MODE_DYNAMIC, _size)

	static const struct mlxsw_sp_sb_pool mlxsw_sp_sb_pools[] = {
	MLXSW_SP_SB_POOL_INGRESS(0, MLXSW_SP_BYTES_TO_CELLS(MLXSW_SP_SB_POOL_INGRESS_SIZE)),
	MLXSW_SP_SB_POOL_INGRESS(1, 0),
	MLXSW_SP_SB_POOL_INGRESS(2, 0),
	MLXSW_SP_SB_POOL_INGRESS(3, 0),
	MLXSW_SP_SB_POOL_EGRESS(0, MLXSW_SP_BYTES_TO_CELLS(MLXSW_SP_SB_POOL_EGRESS_SIZE)),
	MLXSW_SP_SB_POOL_EGRESS(1, 0),
	MLXSW_SP_SB_POOL_EGRESS(2, 0),
	MLXSW_SP_SB_POOL_EGRESS(2, MLXSW_SP_BYTES_TO_CELLS(MLXSW_SP_SB_POOL_EGRESS_SIZE)),
	};

	#define MLXSW_SP_SB_POOLS_LEN ARRAY_SIZE(mlxsw_sp_sb_pools)

	static int mlxsw_sp_sb_pools_init(struct mlxsw_sp *mlxsw_sp)
	{
	char sbpr_pl[MLXSW_REG_SBPR_LEN];
	int i;
	int err;

	for (i = 0; i < MLXSW_SP_SB_POOLS_LEN; i++) {
	const struct mlxsw_sp_sb_pool *pool;

	pool = &mlxsw_sp_sb_pools[i];
	mlxsw_reg_sbpr_pack(sbpr_pl, pool->pool, pool->dir,
	pool->mode, pool->size);
	err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sbpr), sbpr_pl);
	if (err)
	return err;
	}
	return 0;
	}

	struct mlxsw_sp_sb_cm {
	union {
	u8 pg;
	u8 tc;
	} u;
	enum mlxsw_reg_sbxx_dir dir;
	u32 min_buff;
	u32 max_buff;
	u8 pool;
	};

	#define MLXSW_SP_SB_CM(_pg_tc, _dir, _min_buff, _max_buff, _pool) \
	{ \
	.u.pg = _pg_tc, \
	.dir = _dir, \
	.min_buff = _min_buff, \
	.max_buff = _max_buff, \
	.pool = _pool, \
	}

	#define MLXSW_SP_SB_CM_INGRESS(_pg, _min_buff, _max_buff) \
	MLXSW_SP_SB_CM(_pg, MLXSW_REG_SBXX_DIR_INGRESS, \
	_min_buff, _max_buff, 0)

	#define MLXSW_SP_SB_CM_EGRESS(_tc, _min_buff, _max_buff) \
	MLXSW_SP_SB_CM(_tc, MLXSW_REG_SBXX_DIR_EGRESS, \
	_min_buff, _max_buff, 0)

	#define MLXSW_SP_CPU_PORT_SB_CM_EGRESS(_tc) \
	MLXSW_SP_SB_CM(_tc, MLXSW_REG_SBXX_DIR_EGRESS, 104, 2, 3)

	static const struct mlxsw_sp_sb_cm mlxsw_sp_sb_cms[] = {
	MLXSW_SP_SB_CM_INGRESS(0, MLXSW_SP_BYTES_TO_CELLS(10000), 8),
	MLXSW_SP_SB_CM_INGRESS(1, 0, 0),
	MLXSW_SP_SB_CM_INGRESS(2, 0, 0),
	MLXSW_SP_SB_CM_INGRESS(3, 0, 0),
	MLXSW_SP_SB_CM_INGRESS(4, 0, 0),
	MLXSW_SP_SB_CM_INGRESS(5, 0, 0),
	MLXSW_SP_SB_CM_INGRESS(6, 0, 0),
	MLXSW_SP_SB_CM_INGRESS(7, 0, 0),
	MLXSW_SP_SB_CM_INGRESS(9, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff),
	MLXSW_SP_SB_CM_EGRESS(0, MLXSW_SP_BYTES_TO_CELLS(1500), 9),
	MLXSW_SP_SB_CM_EGRESS(1, MLXSW_SP_BYTES_TO_CELLS(1500), 9),
	MLXSW_SP_SB_CM_EGRESS(2, MLXSW_SP_BYTES_TO_CELLS(1500), 9),
	MLXSW_SP_SB_CM_EGRESS(3, MLXSW_SP_BYTES_TO_CELLS(1500), 9),
	MLXSW_SP_SB_CM_EGRESS(4, MLXSW_SP_BYTES_TO_CELLS(1500), 9),
	MLXSW_SP_SB_CM_EGRESS(5, MLXSW_SP_BYTES_TO_CELLS(1500), 9),
	MLXSW_SP_SB_CM_EGRESS(6, MLXSW_SP_BYTES_TO_CELLS(1500), 9),
	MLXSW_SP_SB_CM_EGRESS(7, MLXSW_SP_BYTES_TO_CELLS(1500), 9),
	MLXSW_SP_SB_CM_EGRESS(8, 0, 0),
	MLXSW_SP_SB_CM_EGRESS(9, 0, 0),
	MLXSW_SP_SB_CM_EGRESS(10, 0, 0),
	MLXSW_SP_SB_CM_EGRESS(11, 0, 0),
	MLXSW_SP_SB_CM_EGRESS(12, 0, 0),
	MLXSW_SP_SB_CM_EGRESS(13, 0, 0),
	MLXSW_SP_SB_CM_EGRESS(14, 0, 0),
	MLXSW_SP_SB_CM_EGRESS(15, 0, 0),
	MLXSW_SP_SB_CM_EGRESS(16, 1, 0xff),
	};

	#define MLXSW_SP_SB_CMS_LEN ARRAY_SIZE(mlxsw_sp_sb_cms)

	static const struct mlxsw_sp_sb_cm mlxsw_sp_cpu_port_sb_cms[] = {
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(0),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(1),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(2),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(3),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(4),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(5),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(6),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(7),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(8),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(9),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(10),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(11),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(12),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(13),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(14),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(15),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(16),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(17),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(18),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(19),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(20),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(21),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(22),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(23),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(24),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(25),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(26),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(27),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(28),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(29),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(30),
	MLXSW_SP_CPU_PORT_SB_CM_EGRESS(31),
	};

	#define MLXSW_SP_CPU_PORT_SB_MCS_LEN \
	ARRAY_SIZE(mlxsw_sp_cpu_port_sb_cms)

	static int mlxsw_sp_sb_cms_init(struct mlxsw_sp *mlxsw_sp, u8 local_port,
	const struct mlxsw_sp_sb_cm *cms,
	size_t cms_len)
	{
	char sbcm_pl[MLXSW_REG_SBCM_LEN];
	int i;
	int err;

	for (i = 0; i < cms_len; i++) {
	const struct mlxsw_sp_sb_cm *cm;

	cm = &cms[i];
	mlxsw_reg_sbcm_pack(sbcm_pl, local_port, cm->u.pg, cm->dir,
	cm->min_buff, cm->max_buff, cm->pool);
	err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sbcm), sbcm_pl);
	if (err)
	return err;
	}
	return 0;
	}

	static int mlxsw_sp_port_sb_cms_init(struct mlxsw_sp_port *mlxsw_sp_port)
	{
	return mlxsw_sp_sb_cms_init(mlxsw_sp_port->mlxsw_sp,
	mlxsw_sp_port->local_port, mlxsw_sp_sb_cms,
	MLXSW_SP_SB_CMS_LEN);
	}

	static int mlxsw_sp_cpu_port_sb_cms_init(struct mlxsw_sp *mlxsw_sp)
	{
	return mlxsw_sp_sb_cms_init(mlxsw_sp, 0, mlxsw_sp_cpu_port_sb_cms,
	MLXSW_SP_CPU_PORT_SB_MCS_LEN);
	}

	struct mlxsw_sp_sb_pm {
	u8 pool;
	enum mlxsw_reg_sbxx_dir dir;
	u32 min_buff;
	u32 max_buff;
	};

	#define MLXSW_SP_SB_PM(_pool, _dir, _min_buff, _max_buff) \
	{ \
	.pool = _pool, \
	.dir = _dir, \
	.min_buff = _min_buff, \
	.max_buff = _max_buff, \
	}

	#define MLXSW_SP_SB_PM_INGRESS(_pool, _min_buff, _max_buff) \
	MLXSW_SP_SB_PM(_pool, MLXSW_REG_SBXX_DIR_INGRESS, \
	_min_buff, _max_buff)

	#define MLXSW_SP_SB_PM_EGRESS(_pool, _min_buff, _max_buff) \
	MLXSW_SP_SB_PM(_pool, MLXSW_REG_SBXX_DIR_EGRESS, \
	_min_buff, _max_buff)

	static const struct mlxsw_sp_sb_pm mlxsw_sp_sb_pms[] = {
	MLXSW_SP_SB_PM_INGRESS(0, 0, 0xff),
	MLXSW_SP_SB_PM_INGRESS(1, 0, 0),
	MLXSW_SP_SB_PM_INGRESS(2, 0, 0),
	MLXSW_SP_SB_PM_INGRESS(3, 0, 0),
	MLXSW_SP_SB_PM_EGRESS(0, 0, 7),
	MLXSW_SP_SB_PM_EGRESS(1, 0, 0),
	MLXSW_SP_SB_PM_EGRESS(2, 0, 0),
	MLXSW_SP_SB_PM_EGRESS(3, 0, 0),
	};

	#define MLXSW_SP_SB_PMS_LEN ARRAY_SIZE(mlxsw_sp_sb_pms)

	static int mlxsw_sp_port_sb_pms_init(struct mlxsw_sp_port *mlxsw_sp_port)
	{
	char sbpm_pl[MLXSW_REG_SBPM_LEN];
	int i;
	int err;

	for (i = 0; i < MLXSW_SP_SB_PMS_LEN; i++) {
	const struct mlxsw_sp_sb_pm *pm;

	pm = &mlxsw_sp_sb_pms[i];
	mlxsw_reg_sbpm_pack(sbpm_pl, mlxsw_sp_port->local_port,
	pm->pool, pm->dir,
	pm->min_buff, pm->max_buff);
	err = mlxsw_reg_write(mlxsw_sp_port->mlxsw_sp->core,
	MLXSW_REG(sbpm), sbpm_pl);
	if (err)
	return err;
	}
	return 0;
	}

	struct mlxsw_sp_sb_mm {
	u8 prio;
	u32 min_buff;
	u32 max_buff;
	u8 pool;
	};

	#define MLXSW_SP_SB_MM(_prio, _min_buff, _max_buff, _pool) \
	{ \
	.prio = _prio, \
	.min_buff = _min_buff, \
	.max_buff = _max_buff, \
	.pool = _pool, \
	}

	static const struct mlxsw_sp_sb_mm mlxsw_sp_sb_mms[] = {
	MLXSW_SP_SB_MM(0, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
	MLXSW_SP_SB_MM(1, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
	MLXSW_SP_SB_MM(2, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
	MLXSW_SP_SB_MM(3, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
	MLXSW_SP_SB_MM(4, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
	MLXSW_SP_SB_MM(5, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
	MLXSW_SP_SB_MM(6, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
	MLXSW_SP_SB_MM(7, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
	MLXSW_SP_SB_MM(8, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
	MLXSW_SP_SB_MM(9, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
	MLXSW_SP_SB_MM(10, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
	MLXSW_SP_SB_MM(11, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
	MLXSW_SP_SB_MM(12, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
	MLXSW_SP_SB_MM(13, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
	MLXSW_SP_SB_MM(14, MLXSW_SP_BYTES_TO_CELLS(20000), 0xff, 0),
	};

	#define MLXSW_SP_SB_MMS_LEN ARRAY_SIZE(mlxsw_sp_sb_mms)

	static int mlxsw_sp_sb_mms_init(struct mlxsw_sp *mlxsw_sp)
	{
	char sbmm_pl[MLXSW_REG_SBMM_LEN];
	int i;
	int err;

	for (i = 0; i < MLXSW_SP_SB_MMS_LEN; i++) {
	const struct mlxsw_sp_sb_mm *mc;

	mc = &mlxsw_sp_sb_mms[i];
	mlxsw_reg_sbmm_pack(sbmm_pl, mc->prio, mc->min_buff,
	mc->max_buff, mc->pool);
	err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sbmm), sbmm_pl);
	if (err)
	return err;
	}
	return 0;
	}

	int mlxsw_sp_buffers_init(struct mlxsw_sp *mlxsw_sp)
	{
	int err;

	err = mlxsw_sp_sb_pools_init(mlxsw_sp);
	if (err)
	return err;
	err = mlxsw_sp_cpu_port_sb_cms_init(mlxsw_sp);
	if (err)
	return err;
	err = mlxsw_sp_sb_mms_init(mlxsw_sp);

	return err;
	}

	int mlxsw_sp_port_buffers_init(struct mlxsw_sp_port *mlxsw_sp_port)
	{
	int err;

	err = mlxsw_sp_port_headroom_init(mlxsw_sp_port);
	if (err)
	return err;
	err = mlxsw_sp_port_sb_cms_init(mlxsw_sp_port);
	if (err)
	return err;
	err = mlxsw_sp_port_sb_pms_init(mlxsw_sp_port);

	return err;
	}