Commit d2185e79 authored by Daniel Machon's avatar Daniel Machon Committed by David S. Miller
Browse files

net: microchip: sparx5: add support for PSFP flow-meters 



Add support for configuring PSFP flow-meters (IEEE 802.1Q-2018,
8.6.5.1.3).

The VCAP CLM (VCAP IS0 ingress classifier) classifies streams,
identified by ISDX (Ingress Service Index, frame metadata), and maps
ISDX to flow-meters. SDLB's provide the flow-meter parameters.

Signed-off-by: default avatarDaniel Machon <daniel.machon@microchip.com>
Reviewed-by: default avatarSimon Horman <simon.horman@corigine.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1db82abf

drivers/net/ethernet/microchip/sparx5/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -10,7 +10,7 @@ sparx5-switch-y := sparx5_main.o sparx5_packet.o \ 
 sparx5_switchdev.o sparx5_calendar.o sparx5_ethtool.o sparx5_fdma.o \

 sparx5_ptp.o sparx5_pgid.o sparx5_tc.o sparx5_qos.o \

 sparx5_vcap_impl.o sparx5_vcap_ag_api.o sparx5_tc_flower.o \

 sparx5_tc_matchall.o sparx5_pool.o sparx5_sdlb.o sparx5_police.o

 sparx5_tc_matchall.o sparx5_pool.o sparx5_sdlb.o sparx5_police.o sparx5_psfp.o



sparx5-switch-$(CONFIG_SPARX5_DCB) += sparx5_dcb.o

sparx5-switch-$(CONFIG_DEBUG_FS) += sparx5_vcap_debugfs.o

drivers/net/ethernet/microchip/sparx5/sparx5_main.h

+9 −0
Original line number Diff line number Diff line
@@ -472,6 +472,15 @@ struct sparx5_policer { 


int sparx5_policer_conf_set(struct sparx5 *sparx5, struct sparx5_policer *pol);



/* sparx5_psfp.c */

struct sparx5_psfp_fm {

	struct sparx5_policer pol;

};



int sparx5_psfp_fm_add(struct sparx5 *sparx5, u32 uidx,

		       struct sparx5_psfp_fm *fm, u32 *id);

int sparx5_psfp_fm_del(struct sparx5 *sparx5, u32 id);



/* Clock period in picoseconds */

static inline u32 sparx5_clk_period(enum sparx5_core_clockfreq cclock)

{

drivers/net/ethernet/microchip/sparx5/sparx5_psfp.c

0 → 100644
+88 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0+

/* Microchip Sparx5 Switch driver

 *

 * Copyright (c) 2023 Microchip Technology Inc. and its subsidiaries.

 */



#include "sparx5_main_regs.h"

#include "sparx5_main.h"



/* Pool of available service policers */

static struct sparx5_pool_entry sparx5_psfp_fm_pool[SPX5_SDLB_CNT];



static int sparx5_psfp_fm_get(u32 idx, u32 *id)

{

	return sparx5_pool_get_with_idx(sparx5_psfp_fm_pool, SPX5_SDLB_CNT, idx,

					id);

}



static int sparx5_psfp_fm_put(u32 id)

{

	return sparx5_pool_put(sparx5_psfp_fm_pool, SPX5_SDLB_CNT, id);

}



static int sparx5_sdlb_conf_set(struct sparx5 *sparx5,

				struct sparx5_psfp_fm *fm)

{

	int (*sparx5_sdlb_group_action)(struct sparx5 *sparx5, u32 group,

					u32 idx);



	if (!fm->pol.rate && !fm->pol.burst)

		sparx5_sdlb_group_action = &sparx5_sdlb_group_del;

	else

		sparx5_sdlb_group_action = &sparx5_sdlb_group_add;



	sparx5_policer_conf_set(sparx5, &fm->pol);



	return sparx5_sdlb_group_action(sparx5, fm->pol.group, fm->pol.idx);

}



int sparx5_psfp_fm_add(struct sparx5 *sparx5, u32 uidx,

		       struct sparx5_psfp_fm *fm, u32 *id)

{

	struct sparx5_policer *pol = &fm->pol;

	int ret;



	/* Get flow meter */

	ret = sparx5_psfp_fm_get(uidx, &fm->pol.idx);

	if (ret < 0)

		return ret;

	/* Was already in use, no need to reconfigure */

	if (ret > 1)

		return 0;



	ret = sparx5_sdlb_group_get_by_rate(sparx5, pol->rate, pol->burst);

	if (ret < 0)

		return ret;



	fm->pol.group = ret;



	ret = sparx5_sdlb_conf_set(sparx5, fm);

	if (ret < 0)

		return ret;



	*id = fm->pol.idx;



	return 0;

}



int sparx5_psfp_fm_del(struct sparx5 *sparx5, u32 id)

{

	struct sparx5_psfp_fm fm = { .pol.idx = id,

				     .pol.type = SPX5_POL_SERVICE };

	int ret;



	/* Find the group that this lb belongs to */

	ret = sparx5_sdlb_group_get_by_index(sparx5, id, &fm.pol.group);

	if (ret < 0)

		return ret;



	ret = sparx5_psfp_fm_put(id);

	if (ret < 0)

		return ret;

	/* Do not reset flow-meter if still in use. */

	if (ret > 0)

		return 0;



	return sparx5_sdlb_conf_set(sparx5, &fm);

}