netdev - Re: [EXTERNAL] Re: [RFC PATCH net-next 4/4] net: ti: icssg

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Date: Fri, 8 Sep 2023 11:01:10 +0530
From: MD Danish Anwar <danishanwar@...com>
To: Roger Quadros <rogerq@...nel.org>, Simon Horman <horms@...nel.org>,
        Vignesh Raghavendra <vigneshr@...com>,
        Jacob Keller
	<jacob.e.keller@...el.com>, Andrew Lunn <andrew@...n.ch>,
        Richard Cochran
	<richardcochran@...il.com>,
        Paolo Abeni <pabeni@...hat.com>, Jakub Kicinski
	<kuba@...nel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        "David S. Miller"
	<davem@...emloft.net>
CC: <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>, <srk@...com>,
        <r-gunasekaran@...com>
Subject: Re: [EXTERNAL] Re: [RFC PATCH net-next 4/4] net: ti: icssg_prueth:
 add TAPRIO offload support

On 07/09/23 17:53, Roger Quadros wrote:
> 
> 
> On 30/08/2023 14:08, MD Danish Anwar wrote:
>> From: Roger Quadros <rogerq@...nel.org>
>>
>> ICSSG dual-emac f/w supports Enhanced Scheduled Traffic (EST – defined
>> in P802.1Qbv/D2.2 that later got included in IEEE 802.1Q-2018)
>> configuration. EST allows express queue traffic to be scheduled
>> (placed) on the wire at specific repeatable time intervals. In
>> Linux kernel, EST configuration is done through tc command and
>> the taprio scheduler in the net core implements a software only
>> scheduler (SCH_TAPRIO). If the NIC is capable of EST configuration,
>> user indicate "flag 2" in the command which is then parsed by
>> taprio scheduler in net core and indicate that the command is to
>> be offloaded to h/w. taprio then offloads the command to the
>> driver by calling ndo_setup_tc() ndo ops. This patch implements
>> ndo_setup_tc() to offload EST configuration to ICSSG.
>>
>> Signed-off-by: Roger Quadros <rogerq@...com>
>> Signed-off-by: Vignesh Raghavendra <vigneshr@...com>
>> Signed-off-by: MD Danish Anwar <danishanwar@...com>
>> ---
>>  drivers/net/ethernet/ti/Makefile             |   3 +-
>>  drivers/net/ethernet/ti/icssg/icssg_prueth.c |   5 +-
>>  drivers/net/ethernet/ti/icssg/icssg_prueth.h |   7 +
>>  drivers/net/ethernet/ti/icssg/icssg_qos.c    | 294 +++++++++++++++++++
>>  drivers/net/ethernet/ti/icssg/icssg_qos.h    | 119 ++++++++
>>  5 files changed, 426 insertions(+), 2 deletions(-)
>>  create mode 100644 drivers/net/ethernet/ti/icssg/icssg_qos.c
>>  create mode 100644 drivers/net/ethernet/ti/icssg/icssg_qos.h
>>
>> diff --git a/drivers/net/ethernet/ti/Makefile b/drivers/net/ethernet/ti/Makefile
>> index 3adceff760ce..de348c20eff9 100644
>> --- a/drivers/net/ethernet/ti/Makefile
>> +++ b/drivers/net/ethernet/ti/Makefile
>> @@ -38,5 +38,6 @@ icssg-prueth-y := k3-cppi-desc-pool.o \
>>  		  icssg/icssg_mii_cfg.o \
>>  		  icssg/icssg_stats.o \
>>  		  icssg/icssg_ethtool.o \
>> -		  icssg/icssg_switchdev.o
>> +		  icssg/icssg_switchdev.o \
>> +		  icssg/icssg_qos.o
>>  obj-$(CONFIG_TI_ICSS_IEP) += icssg/icss_iep.o
>> diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.c b/drivers/net/ethernet/ti/icssg/icssg_prueth.c
>> index 5b7e7297ce23..3236af45aa4e 100644
>> --- a/drivers/net/ethernet/ti/icssg/icssg_prueth.c
>> +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.c
>> @@ -1179,7 +1179,7 @@ static int emac_phy_connect(struct prueth_emac *emac)
>>  	return 0;
>>  }
>>  
>> -static u64 prueth_iep_gettime(void *clockops_data, struct ptp_system_timestamp *sts)
>> +u64 prueth_iep_gettime(void *clockops_data, struct ptp_system_timestamp *sts)
>>  {
>>  	u32 hi_rollover_count, hi_rollover_count_r;
>>  	struct prueth_emac *emac = clockops_data;
>> @@ -1416,6 +1416,8 @@ static int emac_ndo_open(struct net_device *ndev)
>>  		napi_enable(&emac->tx_chns[i].napi_tx);
>>  	napi_enable(&emac->napi_rx);
>>  
>> +	icssg_qos_init(ndev);
>> +
>>  	/* start PHY */
>>  	phy_start(ndev->phydev);
>>  
>> @@ -1695,6 +1697,7 @@ static const struct net_device_ops emac_netdev_ops = {
>>  	.ndo_set_rx_mode = emac_ndo_set_rx_mode,
>>  	.ndo_eth_ioctl = emac_ndo_ioctl,
>>  	.ndo_get_stats64 = emac_ndo_get_stats64,
>> +	.ndo_setup_tc = icssg_qos_ndo_setup_tc,
>>  };
>>  
>>  /* get emac_port corresponding to eth_node name */
>> diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.h b/drivers/net/ethernet/ti/icssg/icssg_prueth.h
>> index 6e18da06c786..43b67213d8c7 100644
>> --- a/drivers/net/ethernet/ti/icssg/icssg_prueth.h
>> +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.h
>> @@ -37,6 +37,7 @@
>>  #include "icssg_config.h"
>>  #include "icss_iep.h"
>>  #include "icssg_switch_map.h"
>> +#include "icssg_qos.h"
>>  
>>  #define PRUETH_MAX_MTU          (2000 - ETH_HLEN - ETH_FCS_LEN)
>>  #define PRUETH_MIN_PKT_SIZE     (VLAN_ETH_ZLEN)
>> @@ -186,6 +187,9 @@ struct prueth_emac {
>>  	struct devlink_port devlink_port;
>>  	int port_vlan;
>>  
>> +	struct prueth_qos qos;
>> +	struct work_struct ts_work;
>> +
>>  	struct delayed_work stats_work;
>>  	u64 stats[ICSSG_NUM_STATS];
>>  };
>> @@ -331,4 +335,7 @@ void icssg_set_pvid(struct prueth *prueth, u8 vid, u8 port);
>>  void emac_stats_work_handler(struct work_struct *work);
>>  void emac_update_hardware_stats(struct prueth_emac *emac);
>>  int emac_get_stat_by_name(struct prueth_emac *emac, char *stat_name);
>> +
>> +u64 prueth_iep_gettime(void *clockops_data, struct ptp_system_timestamp *sts);
>> +
>>  #endif /* __NET_TI_ICSSG_PRUETH_H */
>> diff --git a/drivers/net/ethernet/ti/icssg/icssg_qos.c b/drivers/net/ethernet/ti/icssg/icssg_qos.c
>> new file mode 100644
>> index 000000000000..e8102703e257
>> --- /dev/null
>> +++ b/drivers/net/ethernet/ti/icssg/icssg_qos.c
>> @@ -0,0 +1,294 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/* Texas Instruments ICSSG PRUETH QoS submodule
>> + * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
> 
> 2023 here and rest of series.
> 

Sure Roger.

>> + */
>> +
>> +#include <linux/printk.h>
>> +#include "icssg_prueth.h"
>> +#include "icssg_switch_map.h"
>> +
>> +static void icssg_qos_tas_init(struct net_device *ndev);
>> +
>> +void icssg_qos_init(struct net_device *ndev)
>> +{
>> +	icssg_qos_tas_init(ndev);
>> +
>> +	/* IET init goes here */
> 
> Please drop this comment.
> 

Will drop this and post next revision.

>> +}
>> +
> 
> <snip>
> 

-- 
Thanks and Regards,
Danish