core.c 49.9 KB
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/*
 * drivers/net/ethernet/mellanox/mlxsw/core.c
 * Copyright (c) 2015 Mellanox Technologies. All rights reserved.
 * Copyright (c) 2015 Jiri Pirko <jiri@mellanox.com>
 * Copyright (c) 2015 Ido Schimmel <idosch@mellanox.com>
 * Copyright (c) 2015 Elad Raz <eladr@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/module.h>
#include <linux/device.h>
#include <linux/export.h>
#include <linux/err.h>
#include <linux/if_link.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/u64_stats_sync.h>
#include <linux/netdevice.h>
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#include <linux/completion.h>
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#include <linux/skbuff.h>
#include <linux/etherdevice.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/gfp.h>
#include <linux/random.h>
#include <linux/jiffies.h>
#include <linux/mutex.h>
#include <linux/rcupdate.h>
#include <linux/slab.h>
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#include <linux/workqueue.h>
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#include <asm/byteorder.h>
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#include <net/devlink.h>
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#include <trace/events/devlink.h>
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#include "core.h"
#include "item.h"
#include "cmd.h"
#include "port.h"
#include "trap.h"
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#include "emad.h"
#include "reg.h"
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static LIST_HEAD(mlxsw_core_driver_list);
static DEFINE_SPINLOCK(mlxsw_core_driver_list_lock);

static const char mlxsw_core_driver_name[] = "mlxsw_core";

static struct dentry *mlxsw_core_dbg_root;

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static struct workqueue_struct *mlxsw_wq;

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struct mlxsw_core_pcpu_stats {
	u64			trap_rx_packets[MLXSW_TRAP_ID_MAX];
	u64			trap_rx_bytes[MLXSW_TRAP_ID_MAX];
	u64			port_rx_packets[MLXSW_PORT_MAX_PORTS];
	u64			port_rx_bytes[MLXSW_PORT_MAX_PORTS];
	struct u64_stats_sync	syncp;
	u32			trap_rx_dropped[MLXSW_TRAP_ID_MAX];
	u32			port_rx_dropped[MLXSW_PORT_MAX_PORTS];
	u32			trap_rx_invalid;
	u32			port_rx_invalid;
};

struct mlxsw_core {
	struct mlxsw_driver *driver;
	const struct mlxsw_bus *bus;
	void *bus_priv;
	const struct mlxsw_bus_info *bus_info;
	struct list_head rx_listener_list;
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	struct list_head event_listener_list;
	struct {
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		atomic64_t tid;
		struct list_head trans_list;
		spinlock_t trans_list_lock; /* protects trans_list writes */
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		bool use_emad;
	} emad;
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	struct mlxsw_core_pcpu_stats __percpu *pcpu_stats;
	struct dentry *dbg_dir;
	struct {
		struct debugfs_blob_wrapper vsd_blob;
		struct debugfs_blob_wrapper psid_blob;
	} dbg;
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	struct {
		u8 *mapping; /* lag_id+port_index to local_port mapping */
	} lag;
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	struct mlxsw_resources resources;
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	struct mlxsw_hwmon *hwmon;
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	unsigned long driver_priv[0];
	/* driver_priv has to be always the last item */
};

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void *mlxsw_core_driver_priv(struct mlxsw_core *mlxsw_core)
{
	return mlxsw_core->driver_priv;
}
EXPORT_SYMBOL(mlxsw_core_driver_priv);

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struct mlxsw_rx_listener_item {
	struct list_head list;
	struct mlxsw_rx_listener rxl;
	void *priv;
};

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struct mlxsw_event_listener_item {
	struct list_head list;
	struct mlxsw_event_listener el;
	void *priv;
};

/******************
 * EMAD processing
 ******************/

/* emad_eth_hdr_dmac
 * Destination MAC in EMAD's Ethernet header.
 * Must be set to 01:02:c9:00:00:01
 */
MLXSW_ITEM_BUF(emad, eth_hdr, dmac, 0x00, 6);

/* emad_eth_hdr_smac
 * Source MAC in EMAD's Ethernet header.
 * Must be set to 00:02:c9:01:02:03
 */
MLXSW_ITEM_BUF(emad, eth_hdr, smac, 0x06, 6);

/* emad_eth_hdr_ethertype
 * Ethertype in EMAD's Ethernet header.
 * Must be set to 0x8932
 */
MLXSW_ITEM32(emad, eth_hdr, ethertype, 0x0C, 16, 16);

/* emad_eth_hdr_mlx_proto
 * Mellanox protocol.
 * Must be set to 0x0.
 */
MLXSW_ITEM32(emad, eth_hdr, mlx_proto, 0x0C, 8, 8);

/* emad_eth_hdr_ver
 * Mellanox protocol version.
 * Must be set to 0x0.
 */
MLXSW_ITEM32(emad, eth_hdr, ver, 0x0C, 4, 4);

/* emad_op_tlv_type
 * Type of the TLV.
 * Must be set to 0x1 (operation TLV).
 */
MLXSW_ITEM32(emad, op_tlv, type, 0x00, 27, 5);

/* emad_op_tlv_len
 * Length of the operation TLV in u32.
 * Must be set to 0x4.
 */
MLXSW_ITEM32(emad, op_tlv, len, 0x00, 16, 11);

/* emad_op_tlv_dr
 * Direct route bit. Setting to 1 indicates the EMAD is a direct route
 * EMAD. DR TLV must follow.
 *
 * Note: Currently not supported and must not be set.
 */
MLXSW_ITEM32(emad, op_tlv, dr, 0x00, 15, 1);

/* emad_op_tlv_status
 * Returned status in case of EMAD response. Must be set to 0 in case
 * of EMAD request.
 * 0x0 - success
 * 0x1 - device is busy. Requester should retry
 * 0x2 - Mellanox protocol version not supported
 * 0x3 - unknown TLV
 * 0x4 - register not supported
 * 0x5 - operation class not supported
 * 0x6 - EMAD method not supported
 * 0x7 - bad parameter (e.g. port out of range)
 * 0x8 - resource not available
 * 0x9 - message receipt acknowledgment. Requester should retry
 * 0x70 - internal error
 */
MLXSW_ITEM32(emad, op_tlv, status, 0x00, 8, 7);

/* emad_op_tlv_register_id
 * Register ID of register within register TLV.
 */
MLXSW_ITEM32(emad, op_tlv, register_id, 0x04, 16, 16);

/* emad_op_tlv_r
 * Response bit. Setting to 1 indicates Response, otherwise request.
 */
MLXSW_ITEM32(emad, op_tlv, r, 0x04, 15, 1);

/* emad_op_tlv_method
 * EMAD method type.
 * 0x1 - query
 * 0x2 - write
 * 0x3 - send (currently not supported)
 * 0x4 - event
 */
MLXSW_ITEM32(emad, op_tlv, method, 0x04, 8, 7);

/* emad_op_tlv_class
 * EMAD operation class. Must be set to 0x1 (REG_ACCESS).
 */
MLXSW_ITEM32(emad, op_tlv, class, 0x04, 0, 8);

/* emad_op_tlv_tid
 * EMAD transaction ID. Used for pairing request and response EMADs.
 */
MLXSW_ITEM64(emad, op_tlv, tid, 0x08, 0, 64);

/* emad_reg_tlv_type
 * Type of the TLV.
 * Must be set to 0x3 (register TLV).
 */
MLXSW_ITEM32(emad, reg_tlv, type, 0x00, 27, 5);

/* emad_reg_tlv_len
 * Length of the operation TLV in u32.
 */
MLXSW_ITEM32(emad, reg_tlv, len, 0x00, 16, 11);

/* emad_end_tlv_type
 * Type of the TLV.
 * Must be set to 0x0 (end TLV).
 */
MLXSW_ITEM32(emad, end_tlv, type, 0x00, 27, 5);

/* emad_end_tlv_len
 * Length of the end TLV in u32.
 * Must be set to 1.
 */
MLXSW_ITEM32(emad, end_tlv, len, 0x00, 16, 11);

enum mlxsw_core_reg_access_type {
	MLXSW_CORE_REG_ACCESS_TYPE_QUERY,
	MLXSW_CORE_REG_ACCESS_TYPE_WRITE,
};

static inline const char *
mlxsw_core_reg_access_type_str(enum mlxsw_core_reg_access_type type)
{
	switch (type) {
	case MLXSW_CORE_REG_ACCESS_TYPE_QUERY:
		return "query";
	case MLXSW_CORE_REG_ACCESS_TYPE_WRITE:
		return "write";
	}
	BUG();
}

static void mlxsw_emad_pack_end_tlv(char *end_tlv)
{
	mlxsw_emad_end_tlv_type_set(end_tlv, MLXSW_EMAD_TLV_TYPE_END);
	mlxsw_emad_end_tlv_len_set(end_tlv, MLXSW_EMAD_END_TLV_LEN);
}

static void mlxsw_emad_pack_reg_tlv(char *reg_tlv,
				    const struct mlxsw_reg_info *reg,
				    char *payload)
{
	mlxsw_emad_reg_tlv_type_set(reg_tlv, MLXSW_EMAD_TLV_TYPE_REG);
	mlxsw_emad_reg_tlv_len_set(reg_tlv, reg->len / sizeof(u32) + 1);
	memcpy(reg_tlv + sizeof(u32), payload, reg->len);
}

static void mlxsw_emad_pack_op_tlv(char *op_tlv,
				   const struct mlxsw_reg_info *reg,
				   enum mlxsw_core_reg_access_type type,
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				   u64 tid)
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{
	mlxsw_emad_op_tlv_type_set(op_tlv, MLXSW_EMAD_TLV_TYPE_OP);
	mlxsw_emad_op_tlv_len_set(op_tlv, MLXSW_EMAD_OP_TLV_LEN);
	mlxsw_emad_op_tlv_dr_set(op_tlv, 0);
	mlxsw_emad_op_tlv_status_set(op_tlv, 0);
	mlxsw_emad_op_tlv_register_id_set(op_tlv, reg->id);
	mlxsw_emad_op_tlv_r_set(op_tlv, MLXSW_EMAD_OP_TLV_REQUEST);
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	if (type == MLXSW_CORE_REG_ACCESS_TYPE_QUERY)
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		mlxsw_emad_op_tlv_method_set(op_tlv,
					     MLXSW_EMAD_OP_TLV_METHOD_QUERY);
	else
		mlxsw_emad_op_tlv_method_set(op_tlv,
					     MLXSW_EMAD_OP_TLV_METHOD_WRITE);
	mlxsw_emad_op_tlv_class_set(op_tlv,
				    MLXSW_EMAD_OP_TLV_CLASS_REG_ACCESS);
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	mlxsw_emad_op_tlv_tid_set(op_tlv, tid);
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}

static int mlxsw_emad_construct_eth_hdr(struct sk_buff *skb)
{
	char *eth_hdr = skb_push(skb, MLXSW_EMAD_ETH_HDR_LEN);

	mlxsw_emad_eth_hdr_dmac_memcpy_to(eth_hdr, MLXSW_EMAD_EH_DMAC);
	mlxsw_emad_eth_hdr_smac_memcpy_to(eth_hdr, MLXSW_EMAD_EH_SMAC);
	mlxsw_emad_eth_hdr_ethertype_set(eth_hdr, MLXSW_EMAD_EH_ETHERTYPE);
	mlxsw_emad_eth_hdr_mlx_proto_set(eth_hdr, MLXSW_EMAD_EH_MLX_PROTO);
	mlxsw_emad_eth_hdr_ver_set(eth_hdr, MLXSW_EMAD_EH_PROTO_VERSION);

	skb_reset_mac_header(skb);

	return 0;
}

static void mlxsw_emad_construct(struct sk_buff *skb,
				 const struct mlxsw_reg_info *reg,
				 char *payload,
				 enum mlxsw_core_reg_access_type type,
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				 u64 tid)
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{
	char *buf;

	buf = skb_push(skb, MLXSW_EMAD_END_TLV_LEN * sizeof(u32));
	mlxsw_emad_pack_end_tlv(buf);

	buf = skb_push(skb, reg->len + sizeof(u32));
	mlxsw_emad_pack_reg_tlv(buf, reg, payload);

	buf = skb_push(skb, MLXSW_EMAD_OP_TLV_LEN * sizeof(u32));
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	mlxsw_emad_pack_op_tlv(buf, reg, type, tid);
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	mlxsw_emad_construct_eth_hdr(skb);
}

static char *mlxsw_emad_op_tlv(const struct sk_buff *skb)
{
	return ((char *) (skb->data + MLXSW_EMAD_ETH_HDR_LEN));
}

static char *mlxsw_emad_reg_tlv(const struct sk_buff *skb)
{
	return ((char *) (skb->data + MLXSW_EMAD_ETH_HDR_LEN +
				      MLXSW_EMAD_OP_TLV_LEN * sizeof(u32)));
}

static char *mlxsw_emad_reg_payload(const char *op_tlv)
{
	return ((char *) (op_tlv + (MLXSW_EMAD_OP_TLV_LEN + 1) * sizeof(u32)));
}

static u64 mlxsw_emad_get_tid(const struct sk_buff *skb)
{
	char *op_tlv;

	op_tlv = mlxsw_emad_op_tlv(skb);
	return mlxsw_emad_op_tlv_tid_get(op_tlv);
}

static bool mlxsw_emad_is_resp(const struct sk_buff *skb)
{
	char *op_tlv;

	op_tlv = mlxsw_emad_op_tlv(skb);
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	return (mlxsw_emad_op_tlv_r_get(op_tlv) == MLXSW_EMAD_OP_TLV_RESPONSE);
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}

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static int mlxsw_emad_process_status(char *op_tlv,
				     enum mlxsw_emad_op_tlv_status *p_status)
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{
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	*p_status = mlxsw_emad_op_tlv_status_get(op_tlv);
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	switch (*p_status) {
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	case MLXSW_EMAD_OP_TLV_STATUS_SUCCESS:
		return 0;
	case MLXSW_EMAD_OP_TLV_STATUS_BUSY:
	case MLXSW_EMAD_OP_TLV_STATUS_MESSAGE_RECEIPT_ACK:
		return -EAGAIN;
	case MLXSW_EMAD_OP_TLV_STATUS_VERSION_NOT_SUPPORTED:
	case MLXSW_EMAD_OP_TLV_STATUS_UNKNOWN_TLV:
	case MLXSW_EMAD_OP_TLV_STATUS_REGISTER_NOT_SUPPORTED:
	case MLXSW_EMAD_OP_TLV_STATUS_CLASS_NOT_SUPPORTED:
	case MLXSW_EMAD_OP_TLV_STATUS_METHOD_NOT_SUPPORTED:
	case MLXSW_EMAD_OP_TLV_STATUS_BAD_PARAMETER:
	case MLXSW_EMAD_OP_TLV_STATUS_RESOURCE_NOT_AVAILABLE:
	case MLXSW_EMAD_OP_TLV_STATUS_INTERNAL_ERROR:
	default:
		return -EIO;
	}
}

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static int
mlxsw_emad_process_status_skb(struct sk_buff *skb,
			      enum mlxsw_emad_op_tlv_status *p_status)
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{
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	return mlxsw_emad_process_status(mlxsw_emad_op_tlv(skb), p_status);
}

struct mlxsw_reg_trans {
	struct list_head list;
	struct list_head bulk_list;
	struct mlxsw_core *core;
	struct sk_buff *tx_skb;
	struct mlxsw_tx_info tx_info;
	struct delayed_work timeout_dw;
	unsigned int retries;
	u64 tid;
	struct completion completion;
	atomic_t active;
	mlxsw_reg_trans_cb_t *cb;
	unsigned long cb_priv;
	const struct mlxsw_reg_info *reg;
	enum mlxsw_core_reg_access_type type;
	int err;
	enum mlxsw_emad_op_tlv_status emad_status;
	struct rcu_head rcu;
};

#define MLXSW_EMAD_TIMEOUT_MS 200

static void mlxsw_emad_trans_timeout_schedule(struct mlxsw_reg_trans *trans)
{
	unsigned long timeout = msecs_to_jiffies(MLXSW_EMAD_TIMEOUT_MS);

	mlxsw_core_schedule_dw(&trans->timeout_dw, timeout);
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}

static int mlxsw_emad_transmit(struct mlxsw_core *mlxsw_core,
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			       struct mlxsw_reg_trans *trans)
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{
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	struct sk_buff *skb;
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	int err;

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	skb = skb_copy(trans->tx_skb, GFP_KERNEL);
	if (!skb)
		return -ENOMEM;

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	trace_devlink_hwmsg(priv_to_devlink(mlxsw_core), false, 0,
			    skb->data + mlxsw_core->driver->txhdr_len,
			    skb->len - mlxsw_core->driver->txhdr_len);

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	atomic_set(&trans->active, 1);
	err = mlxsw_core_skb_transmit(mlxsw_core, skb, &trans->tx_info);
	if (err) {
		dev_kfree_skb(skb);
		return err;
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	}
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	mlxsw_emad_trans_timeout_schedule(trans);
	return 0;
}
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static void mlxsw_emad_trans_finish(struct mlxsw_reg_trans *trans, int err)
{
	struct mlxsw_core *mlxsw_core = trans->core;

	dev_kfree_skb(trans->tx_skb);
	spin_lock_bh(&mlxsw_core->emad.trans_list_lock);
	list_del_rcu(&trans->list);
	spin_unlock_bh(&mlxsw_core->emad.trans_list_lock);
	trans->err = err;
	complete(&trans->completion);
}

static void mlxsw_emad_transmit_retry(struct mlxsw_core *mlxsw_core,
				      struct mlxsw_reg_trans *trans)
{
	int err;
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	if (trans->retries < MLXSW_EMAD_MAX_RETRY) {
		trans->retries++;
		err = mlxsw_emad_transmit(trans->core, trans);
		if (err == 0)
			return;
	} else {
		err = -EIO;
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	}
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	mlxsw_emad_trans_finish(trans, err);
}
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static void mlxsw_emad_trans_timeout_work(struct work_struct *work)
{
	struct mlxsw_reg_trans *trans = container_of(work,
						     struct mlxsw_reg_trans,
						     timeout_dw.work);

	if (!atomic_dec_and_test(&trans->active))
		return;

	mlxsw_emad_transmit_retry(trans->core, trans);
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}

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static void mlxsw_emad_process_response(struct mlxsw_core *mlxsw_core,
					struct mlxsw_reg_trans *trans,
					struct sk_buff *skb)
{
	int err;

	if (!atomic_dec_and_test(&trans->active))
		return;

	err = mlxsw_emad_process_status_skb(skb, &trans->emad_status);
	if (err == -EAGAIN) {
		mlxsw_emad_transmit_retry(mlxsw_core, trans);
	} else {
		if (err == 0) {
			char *op_tlv = mlxsw_emad_op_tlv(skb);

			if (trans->cb)
				trans->cb(mlxsw_core,
					  mlxsw_emad_reg_payload(op_tlv),
					  trans->reg->len, trans->cb_priv);
		}
		mlxsw_emad_trans_finish(trans, err);
	}
}

/* called with rcu read lock held */
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static void mlxsw_emad_rx_listener_func(struct sk_buff *skb, u8 local_port,
					void *priv)
{
	struct mlxsw_core *mlxsw_core = priv;
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	struct mlxsw_reg_trans *trans;
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	trace_devlink_hwmsg(priv_to_devlink(mlxsw_core), true, 0,
			    skb->data, skb->len);

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	if (!mlxsw_emad_is_resp(skb))
		goto free_skb;

	list_for_each_entry_rcu(trans, &mlxsw_core->emad.trans_list, list) {
		if (mlxsw_emad_get_tid(skb) == trans->tid) {
			mlxsw_emad_process_response(mlxsw_core, trans, skb);
			break;
		}
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	}
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free_skb:
	dev_kfree_skb(skb);
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}

static const struct mlxsw_rx_listener mlxsw_emad_rx_listener = {
	.func = mlxsw_emad_rx_listener_func,
	.local_port = MLXSW_PORT_DONT_CARE,
	.trap_id = MLXSW_TRAP_ID_ETHEMAD,
};

static int mlxsw_emad_traps_set(struct mlxsw_core *mlxsw_core)
{
	char htgt_pl[MLXSW_REG_HTGT_LEN];
	char hpkt_pl[MLXSW_REG_HPKT_LEN];
	int err;

	mlxsw_reg_htgt_pack(htgt_pl, MLXSW_REG_HTGT_TRAP_GROUP_EMAD);
	err = mlxsw_reg_write(mlxsw_core, MLXSW_REG(htgt), htgt_pl);
	if (err)
		return err;

	mlxsw_reg_hpkt_pack(hpkt_pl, MLXSW_REG_HPKT_ACTION_TRAP_TO_CPU,
			    MLXSW_TRAP_ID_ETHEMAD);
	return mlxsw_reg_write(mlxsw_core, MLXSW_REG(hpkt), hpkt_pl);
}

static int mlxsw_emad_init(struct mlxsw_core *mlxsw_core)
{
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	u64 tid;
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	int err;

	/* Set the upper 32 bits of the transaction ID field to a random
	 * number. This allows us to discard EMADs addressed to other
	 * devices.
	 */
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	get_random_bytes(&tid, 4);
	tid <<= 32;
	atomic64_set(&mlxsw_core->emad.tid, tid);
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	INIT_LIST_HEAD(&mlxsw_core->emad.trans_list);
	spin_lock_init(&mlxsw_core->emad.trans_list_lock);
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	err = mlxsw_core_rx_listener_register(mlxsw_core,
					      &mlxsw_emad_rx_listener,
					      mlxsw_core);
	if (err)
		return err;

	err = mlxsw_emad_traps_set(mlxsw_core);
	if (err)
		goto err_emad_trap_set;

	mlxsw_core->emad.use_emad = true;

	return 0;

err_emad_trap_set:
	mlxsw_core_rx_listener_unregister(mlxsw_core,
					  &mlxsw_emad_rx_listener,
					  mlxsw_core);
	return err;
}

static void mlxsw_emad_fini(struct mlxsw_core *mlxsw_core)
{
	char hpkt_pl[MLXSW_REG_HPKT_LEN];

618
	mlxsw_core->emad.use_emad = false;
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	mlxsw_reg_hpkt_pack(hpkt_pl, MLXSW_REG_HPKT_ACTION_DISCARD,
			    MLXSW_TRAP_ID_ETHEMAD);
	mlxsw_reg_write(mlxsw_core, MLXSW_REG(hpkt), hpkt_pl);

	mlxsw_core_rx_listener_unregister(mlxsw_core,
					  &mlxsw_emad_rx_listener,
					  mlxsw_core);
}

static struct sk_buff *mlxsw_emad_alloc(const struct mlxsw_core *mlxsw_core,
					u16 reg_len)
{
	struct sk_buff *skb;
	u16 emad_len;

	emad_len = (reg_len + sizeof(u32) + MLXSW_EMAD_ETH_HDR_LEN +
		    (MLXSW_EMAD_OP_TLV_LEN + MLXSW_EMAD_END_TLV_LEN) *
		    sizeof(u32) + mlxsw_core->driver->txhdr_len);
	if (emad_len > MLXSW_EMAD_MAX_FRAME_LEN)
		return NULL;

	skb = netdev_alloc_skb(NULL, emad_len);
	if (!skb)
		return NULL;
	memset(skb->data, 0, emad_len);
	skb_reserve(skb, emad_len);

	return skb;
}

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static int mlxsw_emad_reg_access(struct mlxsw_core *mlxsw_core,
				 const struct mlxsw_reg_info *reg,
				 char *payload,
				 enum mlxsw_core_reg_access_type type,
				 struct mlxsw_reg_trans *trans,
				 struct list_head *bulk_list,
				 mlxsw_reg_trans_cb_t *cb,
				 unsigned long cb_priv, u64 tid)
{
	struct sk_buff *skb;
	int err;

	dev_dbg(mlxsw_core->bus_info->dev, "EMAD reg access (tid=%llx,reg_id=%x(%s),type=%s)\n",
		trans->tid, reg->id, mlxsw_reg_id_str(reg->id),
		mlxsw_core_reg_access_type_str(type));

	skb = mlxsw_emad_alloc(mlxsw_core, reg->len);
	if (!skb)
		return -ENOMEM;

	list_add_tail(&trans->bulk_list, bulk_list);
	trans->core = mlxsw_core;
	trans->tx_skb = skb;
	trans->tx_info.local_port = MLXSW_PORT_CPU_PORT;
	trans->tx_info.is_emad = true;
	INIT_DELAYED_WORK(&trans->timeout_dw, mlxsw_emad_trans_timeout_work);
	trans->tid = tid;
	init_completion(&trans->completion);
	trans->cb = cb;
	trans->cb_priv = cb_priv;
	trans->reg = reg;
	trans->type = type;

	mlxsw_emad_construct(skb, reg, payload, type, trans->tid);
	mlxsw_core->driver->txhdr_construct(skb, &trans->tx_info);

	spin_lock_bh(&mlxsw_core->emad.trans_list_lock);
	list_add_tail_rcu(&trans->list, &mlxsw_core->emad.trans_list);
	spin_unlock_bh(&mlxsw_core->emad.trans_list_lock);
	err = mlxsw_emad_transmit(mlxsw_core, trans);
	if (err)
		goto err_out;
	return 0;

err_out:
	spin_lock_bh(&mlxsw_core->emad.trans_list_lock);
	list_del_rcu(&trans->list);
	spin_unlock_bh(&mlxsw_core->emad.trans_list_lock);
	list_del(&trans->bulk_list);
	dev_kfree_skb(trans->tx_skb);
	return err;
}

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/*****************
 * Core functions
 *****************/

static int mlxsw_core_rx_stats_dbg_read(struct seq_file *file, void *data)
{
	struct mlxsw_core *mlxsw_core = file->private;
	struct mlxsw_core_pcpu_stats *p;
	u64 rx_packets, rx_bytes;
	u64 tmp_rx_packets, tmp_rx_bytes;
	u32 rx_dropped, rx_invalid;
	unsigned int start;
	int i;
	int j;
	static const char hdr[] =
		"     NUM   RX_PACKETS     RX_BYTES RX_DROPPED\n";

	seq_printf(file, hdr);
	for (i = 0; i < MLXSW_TRAP_ID_MAX; i++) {
		rx_packets = 0;
		rx_bytes = 0;
		rx_dropped = 0;
		for_each_possible_cpu(j) {
			p = per_cpu_ptr(mlxsw_core->pcpu_stats, j);
			do {
				start = u64_stats_fetch_begin(&p->syncp);
				tmp_rx_packets = p->trap_rx_packets[i];
				tmp_rx_bytes = p->trap_rx_bytes[i];
			} while (u64_stats_fetch_retry(&p->syncp, start));

			rx_packets += tmp_rx_packets;
			rx_bytes += tmp_rx_bytes;
			rx_dropped += p->trap_rx_dropped[i];
		}
		seq_printf(file, "trap %3d %12llu %12llu %10u\n",
			   i, rx_packets, rx_bytes, rx_dropped);
	}
	rx_invalid = 0;
	for_each_possible_cpu(j) {
		p = per_cpu_ptr(mlxsw_core->pcpu_stats, j);
		rx_invalid += p->trap_rx_invalid;
	}
	seq_printf(file, "trap INV                           %10u\n",
		   rx_invalid);

	for (i = 0; i < MLXSW_PORT_MAX_PORTS; i++) {
		rx_packets = 0;
		rx_bytes = 0;
		rx_dropped = 0;
		for_each_possible_cpu(j) {
			p = per_cpu_ptr(mlxsw_core->pcpu_stats, j);
			do {
				start = u64_stats_fetch_begin(&p->syncp);
				tmp_rx_packets = p->port_rx_packets[i];
				tmp_rx_bytes = p->port_rx_bytes[i];
			} while (u64_stats_fetch_retry(&p->syncp, start));

			rx_packets += tmp_rx_packets;
			rx_bytes += tmp_rx_bytes;
			rx_dropped += p->port_rx_dropped[i];
		}
		seq_printf(file, "port %3d %12llu %12llu %10u\n",
			   i, rx_packets, rx_bytes, rx_dropped);
	}
	rx_invalid = 0;
	for_each_possible_cpu(j) {
		p = per_cpu_ptr(mlxsw_core->pcpu_stats, j);
		rx_invalid += p->port_rx_invalid;
	}
	seq_printf(file, "port INV                           %10u\n",
		   rx_invalid);
	return 0;
}

static int mlxsw_core_rx_stats_dbg_open(struct inode *inode, struct file *f)
{
	struct mlxsw_core *mlxsw_core = inode->i_private;

	return single_open(f, mlxsw_core_rx_stats_dbg_read, mlxsw_core);
}

static const struct file_operations mlxsw_core_rx_stats_dbg_ops = {
	.owner = THIS_MODULE,
	.open = mlxsw_core_rx_stats_dbg_open,
	.release = single_release,
	.read = seq_read,
	.llseek = seq_lseek
};

int mlxsw_core_driver_register(struct mlxsw_driver *mlxsw_driver)
{
	spin_lock(&mlxsw_core_driver_list_lock);
	list_add_tail(&mlxsw_driver->list, &mlxsw_core_driver_list);
	spin_unlock(&mlxsw_core_driver_list_lock);
	return 0;
}
EXPORT_SYMBOL(mlxsw_core_driver_register);

void mlxsw_core_driver_unregister(struct mlxsw_driver *mlxsw_driver)
{
	spin_lock(&mlxsw_core_driver_list_lock);
	list_del(&mlxsw_driver->list);
	spin_unlock(&mlxsw_core_driver_list_lock);
}
EXPORT_SYMBOL(mlxsw_core_driver_unregister);

static struct mlxsw_driver *__driver_find(const char *kind)
{
	struct mlxsw_driver *mlxsw_driver;

	list_for_each_entry(mlxsw_driver, &mlxsw_core_driver_list, list) {
		if (strcmp(mlxsw_driver->kind, kind) == 0)
			return mlxsw_driver;
	}
	return NULL;
}

static struct mlxsw_driver *mlxsw_core_driver_get(const char *kind)
{
	struct mlxsw_driver *mlxsw_driver;

	spin_lock(&mlxsw_core_driver_list_lock);
	mlxsw_driver = __driver_find(kind);
	if (!mlxsw_driver) {
		spin_unlock(&mlxsw_core_driver_list_lock);
		request_module(MLXSW_MODULE_ALIAS_PREFIX "%s", kind);
		spin_lock(&mlxsw_core_driver_list_lock);
		mlxsw_driver = __driver_find(kind);
	}
	if (mlxsw_driver) {
		if (!try_module_get(mlxsw_driver->owner))
			mlxsw_driver = NULL;
	}

	spin_unlock(&mlxsw_core_driver_list_lock);
	return mlxsw_driver;
}

static void mlxsw_core_driver_put(const char *kind)
{
	struct mlxsw_driver *mlxsw_driver;

	spin_lock(&mlxsw_core_driver_list_lock);
	mlxsw_driver = __driver_find(kind);
	spin_unlock(&mlxsw_core_driver_list_lock);
	if (!mlxsw_driver)
		return;
	module_put(mlxsw_driver->owner);
}

static int mlxsw_core_debugfs_init(struct mlxsw_core *mlxsw_core)
{
	const struct mlxsw_bus_info *bus_info = mlxsw_core->bus_info;

	mlxsw_core->dbg_dir = debugfs_create_dir(bus_info->device_name,
						 mlxsw_core_dbg_root);
	if (!mlxsw_core->dbg_dir)
		return -ENOMEM;
	debugfs_create_file("rx_stats", S_IRUGO, mlxsw_core->dbg_dir,
			    mlxsw_core, &mlxsw_core_rx_stats_dbg_ops);
	mlxsw_core->dbg.vsd_blob.data = (void *) &bus_info->vsd;
	mlxsw_core->dbg.vsd_blob.size = sizeof(bus_info->vsd);
	debugfs_create_blob("vsd", S_IRUGO, mlxsw_core->dbg_dir,
			    &mlxsw_core->dbg.vsd_blob);
	mlxsw_core->dbg.psid_blob.data = (void *) &bus_info->psid;
	mlxsw_core->dbg.psid_blob.size = sizeof(bus_info->psid);
	debugfs_create_blob("psid", S_IRUGO, mlxsw_core->dbg_dir,
			    &mlxsw_core->dbg.psid_blob);
	return 0;
}

static void mlxsw_core_debugfs_fini(struct mlxsw_core *mlxsw_core)
{
	debugfs_remove_recursive(mlxsw_core->dbg_dir);
}

878 879 880 881 882 883 884 885 886 887
static int mlxsw_devlink_port_split(struct devlink *devlink,
				    unsigned int port_index,
				    unsigned int count)
{
	struct mlxsw_core *mlxsw_core = devlink_priv(devlink);

	if (port_index >= MLXSW_PORT_MAX_PORTS)
		return -EINVAL;
	if (!mlxsw_core->driver->port_split)
		return -EOPNOTSUPP;
888
	return mlxsw_core->driver->port_split(mlxsw_core, port_index, count);
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}

static int mlxsw_devlink_port_unsplit(struct devlink *devlink,
				      unsigned int port_index)
{
	struct mlxsw_core *mlxsw_core = devlink_priv(devlink);

	if (port_index >= MLXSW_PORT_MAX_PORTS)
		return -EINVAL;
	if (!mlxsw_core->driver->port_unsplit)
		return -EOPNOTSUPP;
900
	return mlxsw_core->driver->port_unsplit(mlxsw_core, port_index);
901 902
}

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static int
mlxsw_devlink_sb_pool_get(struct devlink *devlink,
			  unsigned int sb_index, u16 pool_index,
			  struct devlink_sb_pool_info *pool_info)
{
	struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
	struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;

	if (!mlxsw_driver->sb_pool_get)
		return -EOPNOTSUPP;
	return mlxsw_driver->sb_pool_get(mlxsw_core, sb_index,
					 pool_index, pool_info);
}

static int
mlxsw_devlink_sb_pool_set(struct devlink *devlink,
			  unsigned int sb_index, u16 pool_index, u32 size,
			  enum devlink_sb_threshold_type threshold_type)
{
	struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
	struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;

	if (!mlxsw_driver->sb_pool_set)
		return -EOPNOTSUPP;
	return mlxsw_driver->sb_pool_set(mlxsw_core, sb_index,
					 pool_index, size, threshold_type);
}

static void *__dl_port(struct devlink_port *devlink_port)
{
	return container_of(devlink_port, struct mlxsw_core_port, devlink_port);
}

static int mlxsw_devlink_sb_port_pool_get(struct devlink_port *devlink_port,
					  unsigned int sb_index, u16 pool_index,
					  u32 *p_threshold)
{
	struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
	struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
	struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);

	if (!mlxsw_driver->sb_port_pool_get)
		return -EOPNOTSUPP;
	return mlxsw_driver->sb_port_pool_get(mlxsw_core_port, sb_index,
					      pool_index, p_threshold);
}

static int mlxsw_devlink_sb_port_pool_set(struct devlink_port *devlink_port,
					  unsigned int sb_index, u16 pool_index,
					  u32 threshold)
{
	struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
	struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
	struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);

	if (!mlxsw_driver->sb_port_pool_set)
		return -EOPNOTSUPP;
	return mlxsw_driver->sb_port_pool_set(mlxsw_core_port, sb_index,
					      pool_index, threshold);
}

static int
mlxsw_devlink_sb_tc_pool_bind_get(struct devlink_port *devlink_port,
				  unsigned int sb_index, u16 tc_index,
				  enum devlink_sb_pool_type pool_type,
				  u16 *p_pool_index, u32 *p_threshold)
{
	struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
	struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
	struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);

	if (!mlxsw_driver->sb_tc_pool_bind_get)
		return -EOPNOTSUPP;
	return mlxsw_driver->sb_tc_pool_bind_get(mlxsw_core_port, sb_index,
						 tc_index, pool_type,
						 p_pool_index, p_threshold);
}

static int
mlxsw_devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port,
				  unsigned int sb_index, u16 tc_index,
				  enum devlink_sb_pool_type pool_type,
				  u16 pool_index, u32 threshold)
{
	struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
	struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
	struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);

	if (!mlxsw_driver->sb_tc_pool_bind_set)
		return -EOPNOTSUPP;
	return mlxsw_driver->sb_tc_pool_bind_set(mlxsw_core_port, sb_index,
						 tc_index, pool_type,
						 pool_index, threshold);
}

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static int mlxsw_devlink_sb_occ_snapshot(struct devlink *devlink,
					 unsigned int sb_index)
{
	struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
	struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;

	if (!mlxsw_driver->sb_occ_snapshot)
		return -EOPNOTSUPP;
	return mlxsw_driver->sb_occ_snapshot(mlxsw_core, sb_index);
}

static int mlxsw_devlink_sb_occ_max_clear(struct devlink *devlink,
					  unsigned int sb_index)
{
	struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
	struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;

	if (!mlxsw_driver->sb_occ_max_clear)
		return -EOPNOTSUPP;
	return mlxsw_driver->sb_occ_max_clear(mlxsw_core, sb_index);
}

static int
mlxsw_devlink_sb_occ_port_pool_get(struct devlink_port *devlink_port,
				   unsigned int sb_index, u16 pool_index,
				   u32 *p_cur, u32 *p_max)
{
	struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
	struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
	struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);

	if (!mlxsw_driver->sb_occ_port_pool_get)
		return -EOPNOTSUPP;
	return mlxsw_driver->sb_occ_port_pool_get(mlxsw_core_port, sb_index,
						  pool_index, p_cur, p_max);
}

static int
mlxsw_devlink_sb_occ_tc_port_bind_get(struct devlink_port *devlink_port,
				      unsigned int sb_index, u16 tc_index,
				      enum devlink_sb_pool_type pool_type,
				      u32 *p_cur, u32 *p_max)
{
	struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
	struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
	struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);

	if (!mlxsw_driver->sb_occ_tc_port_bind_get)
		return -EOPNOTSUPP;
	return mlxsw_driver->sb_occ_tc_port_bind_get(mlxsw_core_port,
						     sb_index, tc_index,
						     pool_type, p_cur, p_max);
}

1052
static const struct devlink_ops mlxsw_devlink_ops = {
1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064
	.port_split			= mlxsw_devlink_port_split,
	.port_unsplit			= mlxsw_devlink_port_unsplit,
	.sb_pool_get			= mlxsw_devlink_sb_pool_get,
	.sb_pool_set			= mlxsw_devlink_sb_pool_set,
	.sb_port_pool_get		= mlxsw_devlink_sb_port_pool_get,
	.sb_port_pool_set		= mlxsw_devlink_sb_port_pool_set,
	.sb_tc_pool_bind_get		= mlxsw_devlink_sb_tc_pool_bind_get,
	.sb_tc_pool_bind_set		= mlxsw_devlink_sb_tc_pool_bind_set,
	.sb_occ_snapshot		= mlxsw_devlink_sb_occ_snapshot,
	.sb_occ_max_clear		= mlxsw_devlink_sb_occ_max_clear,
	.sb_occ_port_pool_get		= mlxsw_devlink_sb_occ_port_pool_get,
	.sb_occ_tc_port_bind_get	= mlxsw_devlink_sb_occ_tc_port_bind_get,
1065 1066
};

1067 1068 1069 1070 1071 1072 1073
int mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info,
				   const struct mlxsw_bus *mlxsw_bus,
				   void *bus_priv)
{
	const char *device_kind = mlxsw_bus_info->device_kind;
	struct mlxsw_core *mlxsw_core;
	struct mlxsw_driver *mlxsw_driver;
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Jiri Pirko 已提交
1074
	struct devlink *devlink;
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	size_t alloc_size;
	int err;

	mlxsw_driver = mlxsw_core_driver_get(device_kind);
	if (!mlxsw_driver)
		return -EINVAL;
	alloc_size = sizeof(*mlxsw_core) + mlxsw_driver->priv_size;
1082
	devlink = devlink_alloc(&mlxsw_devlink_ops, alloc_size);
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Jiri Pirko 已提交
1083
	if (!devlink) {
1084
		err = -ENOMEM;
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Jiri Pirko 已提交
1085
		goto err_devlink_alloc;
1086 1087
	}

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	mlxsw_core = devlink_priv(devlink);
1089
	INIT_LIST_HEAD(&mlxsw_core->rx_listener_list);
1090
	INIT_LIST_HEAD(&mlxsw_core->event_listener_list);
1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101
	mlxsw_core->driver = mlxsw_driver;
	mlxsw_core->bus = mlxsw_bus;
	mlxsw_core->bus_priv = bus_priv;
	mlxsw_core->bus_info = mlxsw_bus_info;

	mlxsw_core->pcpu_stats =
		netdev_alloc_pcpu_stats(struct mlxsw_core_pcpu_stats);
	if (!mlxsw_core->pcpu_stats) {
		err = -ENOMEM;
		goto err_alloc_stats;
	}
1102

1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113
	if (mlxsw_driver->profile->used_max_lag &&
	    mlxsw_driver->profile->used_max_port_per_lag) {
		alloc_size = sizeof(u8) * mlxsw_driver->profile->max_lag *
			     mlxsw_driver->profile->max_port_per_lag;
		mlxsw_core->lag.mapping = kzalloc(alloc_size, GFP_KERNEL);
		if (!mlxsw_core->lag.mapping) {
			err = -ENOMEM;
			goto err_alloc_lag_mapping;
		}
	}

1114 1115
	err = mlxsw_bus->init(bus_priv, mlxsw_core, mlxsw_driver->profile,
			      &mlxsw_core->resources);
1116 1117 1118
	if (err)
		goto err_bus_init;

1119 1120 1121 1122
	err = mlxsw_emad_init(mlxsw_core);
	if (err)
		goto err_emad_init;

J
Jiri Pirko 已提交
1123 1124 1125 1126
	err = devlink_register(devlink, mlxsw_bus_info->dev);
	if (err)
		goto err_devlink_register;

J
Jiri Pirko 已提交
1127 1128 1129 1130
	err = mlxsw_hwmon_init(mlxsw_core, mlxsw_bus_info, &mlxsw_core->hwmon);
	if (err)
		goto err_hwmon_init;

1131
	err = mlxsw_driver->init(mlxsw_core, mlxsw_bus_info);
1132 1133 1134 1135 1136 1137 1138 1139 1140 1141
	if (err)
		goto err_driver_init;

	err = mlxsw_core_debugfs_init(mlxsw_core);
	if (err)
		goto err_debugfs_init;

	return 0;

err_debugfs_init:
1142
	mlxsw_core->driver->fini(mlxsw_core);
1143
err_driver_init:
J
Jiri Pirko 已提交
1144
err_hwmon_init:
J
Jiri Pirko 已提交
1145 1146
	devlink_unregister(devlink);
err_devlink_register:
1147 1148
	mlxsw_emad_fini(mlxsw_core);
err_emad_init:
1149 1150
	mlxsw_bus->fini(bus_priv);
err_bus_init:
1151 1152
	kfree(mlxsw_core->lag.mapping);
err_alloc_lag_mapping:
1153 1154
	free_percpu(mlxsw_core->pcpu_stats);
err_alloc_stats:
J
Jiri Pirko 已提交
1155 1156
	devlink_free(devlink);
err_devlink_alloc:
1157 1158 1159 1160 1161 1162 1163 1164
	mlxsw_core_driver_put(device_kind);
	return err;
}
EXPORT_SYMBOL(mlxsw_core_bus_device_register);

void mlxsw_core_bus_device_unregister(struct mlxsw_core *mlxsw_core)
{
	const char *device_kind = mlxsw_core->bus_info->device_kind;
J
Jiri Pirko 已提交
1165
	struct devlink *devlink = priv_to_devlink(mlxsw_core);
1166 1167

	mlxsw_core_debugfs_fini(mlxsw_core);
1168
	mlxsw_core->driver->fini(mlxsw_core);
J
Jiri Pirko 已提交
1169
	devlink_unregister(devlink);
1170
	mlxsw_emad_fini(mlxsw_core);
1171
	mlxsw_core->bus->fini(mlxsw_core->bus_priv);
1172
	kfree(mlxsw_core->lag.mapping);
1173
	free_percpu(mlxsw_core->pcpu_stats);
J
Jiri Pirko 已提交
1174
	devlink_free(devlink);
1175 1176 1177 1178
	mlxsw_core_driver_put(device_kind);
}
EXPORT_SYMBOL(mlxsw_core_bus_device_unregister);

1179
bool mlxsw_core_skb_transmit_busy(struct mlxsw_core *mlxsw_core,
1180 1181 1182 1183 1184 1185 1186
				  const struct mlxsw_tx_info *tx_info)
{
	return mlxsw_core->bus->skb_transmit_busy(mlxsw_core->bus_priv,
						  tx_info);
}
EXPORT_SYMBOL(mlxsw_core_skb_transmit_busy);

1187
int mlxsw_core_skb_transmit(struct mlxsw_core *mlxsw_core, struct sk_buff *skb,
1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252
			    const struct mlxsw_tx_info *tx_info)
{
	return mlxsw_core->bus->skb_transmit(mlxsw_core->bus_priv, skb,
					     tx_info);
}
EXPORT_SYMBOL(mlxsw_core_skb_transmit);

static bool __is_rx_listener_equal(const struct mlxsw_rx_listener *rxl_a,
				   const struct mlxsw_rx_listener *rxl_b)
{
	return (rxl_a->func == rxl_b->func &&
		rxl_a->local_port == rxl_b->local_port &&
		rxl_a->trap_id == rxl_b->trap_id);
}

static struct mlxsw_rx_listener_item *
__find_rx_listener_item(struct mlxsw_core *mlxsw_core,
			const struct mlxsw_rx_listener *rxl,
			void *priv)
{
	struct mlxsw_rx_listener_item *rxl_item;

	list_for_each_entry(rxl_item, &mlxsw_core->rx_listener_list, list) {
		if (__is_rx_listener_equal(&rxl_item->rxl, rxl) &&
		    rxl_item->priv == priv)
			return rxl_item;
	}
	return NULL;
}

int mlxsw_core_rx_listener_register(struct mlxsw_core *mlxsw_core,
				    const struct mlxsw_rx_listener *rxl,
				    void *priv)
{
	struct mlxsw_rx_listener_item *rxl_item;

	rxl_item = __find_rx_listener_item(mlxsw_core, rxl, priv);
	if (rxl_item)
		return -EEXIST;
	rxl_item = kmalloc(sizeof(*rxl_item), GFP_KERNEL);
	if (!rxl_item)
		return -ENOMEM;
	rxl_item->rxl = *rxl;
	rxl_item->priv = priv;

	list_add_rcu(&rxl_item->list, &mlxsw_core->rx_listener_list);
	return 0;
}
EXPORT_SYMBOL(mlxsw_core_rx_listener_register);

void mlxsw_core_rx_listener_unregister(struct mlxsw_core *mlxsw_core,
				       const struct mlxsw_rx_listener *rxl,
				       void *priv)
{
	struct mlxsw_rx_listener_item *rxl_item;

	rxl_item = __find_rx_listener_item(mlxsw_core, rxl, priv);
	if (!rxl_item)
		return;
	list_del_rcu(&rxl_item->list);
	synchronize_rcu();
	kfree(rxl_item);
}
EXPORT_SYMBOL(mlxsw_core_rx_listener_unregister);

1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348
static void mlxsw_core_event_listener_func(struct sk_buff *skb, u8 local_port,
					   void *priv)
{
	struct mlxsw_event_listener_item *event_listener_item = priv;
	struct mlxsw_reg_info reg;
	char *payload;
	char *op_tlv = mlxsw_emad_op_tlv(skb);
	char *reg_tlv = mlxsw_emad_reg_tlv(skb);

	reg.id = mlxsw_emad_op_tlv_register_id_get(op_tlv);
	reg.len = (mlxsw_emad_reg_tlv_len_get(reg_tlv) - 1) * sizeof(u32);
	payload = mlxsw_emad_reg_payload(op_tlv);
	event_listener_item->el.func(&reg, payload, event_listener_item->priv);
	dev_kfree_skb(skb);
}

static bool __is_event_listener_equal(const struct mlxsw_event_listener *el_a,
				      const struct mlxsw_event_listener *el_b)
{
	return (el_a->func == el_b->func &&
		el_a->trap_id == el_b->trap_id);
}

static struct mlxsw_event_listener_item *
__find_event_listener_item(struct mlxsw_core *mlxsw_core,
			   const struct mlxsw_event_listener *el,
			   void *priv)
{
	struct mlxsw_event_listener_item *el_item;

	list_for_each_entry(el_item, &mlxsw_core->event_listener_list, list) {
		if (__is_event_listener_equal(&el_item->el, el) &&
		    el_item->priv == priv)
			return el_item;
	}
	return NULL;
}

int mlxsw_core_event_listener_register(struct mlxsw_core *mlxsw_core,
				       const struct mlxsw_event_listener *el,
				       void *priv)
{
	int err;
	struct mlxsw_event_listener_item *el_item;
	const struct mlxsw_rx_listener rxl = {
		.func = mlxsw_core_event_listener_func,
		.local_port = MLXSW_PORT_DONT_CARE,
		.trap_id = el->trap_id,
	};

	el_item = __find_event_listener_item(mlxsw_core, el, priv);
	if (el_item)
		return -EEXIST;
	el_item = kmalloc(sizeof(*el_item), GFP_KERNEL);
	if (!el_item)
		return -ENOMEM;
	el_item->el = *el;
	el_item->priv = priv;

	err = mlxsw_core_rx_listener_register(mlxsw_core, &rxl, el_item);
	if (err)
		goto err_rx_listener_register;

	/* No reason to save item if we did not manage to register an RX
	 * listener for it.
	 */
	list_add_rcu(&el_item->list, &mlxsw_core->event_listener_list);

	return 0;

err_rx_listener_register:
	kfree(el_item);
	return err;
}
EXPORT_SYMBOL(mlxsw_core_event_listener_register);

void mlxsw_core_event_listener_unregister(struct mlxsw_core *mlxsw_core,
					  const struct mlxsw_event_listener *el,
					  void *priv)
{
	struct mlxsw_event_listener_item *el_item;
	const struct mlxsw_rx_listener rxl = {
		.func = mlxsw_core_event_listener_func,
		.local_port = MLXSW_PORT_DONT_CARE,
		.trap_id = el->trap_id,
	};

	el_item = __find_event_listener_item(mlxsw_core, el, priv);
	if (!el_item)
		return;
	mlxsw_core_rx_listener_unregister(mlxsw_core, &rxl, el_item);
	list_del(&el_item->list);
	kfree(el_item);
}
EXPORT_SYMBOL(mlxsw_core_event_listener_unregister);

1349 1350 1351 1352 1353
static u64 mlxsw_core_tid_get(struct mlxsw_core *mlxsw_core)
{
	return atomic64_inc_return(&mlxsw_core->emad.tid);
}

1354 1355 1356
static int mlxsw_core_reg_access_emad(struct mlxsw_core *mlxsw_core,
				      const struct mlxsw_reg_info *reg,
				      char *payload,
1357 1358 1359 1360
				      enum mlxsw_core_reg_access_type type,
				      struct list_head *bulk_list,
				      mlxsw_reg_trans_cb_t *cb,
				      unsigned long cb_priv)
1361
{
1362 1363
	u64 tid = mlxsw_core_tid_get(mlxsw_core);
	struct mlxsw_reg_trans *trans;
1364 1365
	int err;

1366 1367
	trans = kzalloc(sizeof(*trans), GFP_KERNEL);
	if (!trans)
1368 1369
		return -ENOMEM;

1370 1371 1372 1373 1374 1375 1376 1377
	err = mlxsw_emad_reg_access(mlxsw_core, reg, payload, type, trans,
				    bulk_list, cb, cb_priv, tid);
	if (err) {
		kfree(trans);
		return err;
	}
	return 0;
}
1378

1379 1380 1381 1382 1383 1384 1385 1386 1387 1388
int mlxsw_reg_trans_query(struct mlxsw_core *mlxsw_core,
			  const struct mlxsw_reg_info *reg, char *payload,
			  struct list_head *bulk_list,
			  mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv)
{
	return mlxsw_core_reg_access_emad(mlxsw_core, reg, payload,
					  MLXSW_CORE_REG_ACCESS_TYPE_QUERY,
					  bulk_list, cb, cb_priv);
}
EXPORT_SYMBOL(mlxsw_reg_trans_query);
1389

1390 1391 1392 1393 1394 1395 1396 1397 1398 1399
int mlxsw_reg_trans_write(struct mlxsw_core *mlxsw_core,
			  const struct mlxsw_reg_info *reg, char *payload,
			  struct list_head *bulk_list,
			  mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv)
{
	return mlxsw_core_reg_access_emad(mlxsw_core, reg, payload,
					  MLXSW_CORE_REG_ACCESS_TYPE_WRITE,
					  bulk_list, cb, cb_priv);
}
EXPORT_SYMBOL(mlxsw_reg_trans_write);
1400

1401 1402 1403 1404
static int mlxsw_reg_trans_wait(struct mlxsw_reg_trans *trans)
{
	struct mlxsw_core *mlxsw_core = trans->core;
	int err;
1405

1406 1407 1408
	wait_for_completion(&trans->completion);
	cancel_delayed_work_sync(&trans->timeout_dw);
	err = trans->err;
1409

1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422
	if (trans->retries)
		dev_warn(mlxsw_core->bus_info->dev, "EMAD retries (%d/%d) (tid=%llx)\n",
			 trans->retries, MLXSW_EMAD_MAX_RETRY, trans->tid);
	if (err)
		dev_err(mlxsw_core->bus_info->dev, "EMAD reg access failed (tid=%llx,reg_id=%x(%s),type=%s,status=%x(%s))\n",
			trans->tid, trans->reg->id,
			mlxsw_reg_id_str(trans->reg->id),
			mlxsw_core_reg_access_type_str(trans->type),
			trans->emad_status,
			mlxsw_emad_op_tlv_status_str(trans->emad_status));

	list_del(&trans->bulk_list);
	kfree_rcu(trans, rcu);
1423 1424 1425
	return err;
}

1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441
int mlxsw_reg_trans_bulk_wait(struct list_head *bulk_list)
{
	struct mlxsw_reg_trans *trans;
	struct mlxsw_reg_trans *tmp;
	int sum_err = 0;
	int err;

	list_for_each_entry_safe(trans, tmp, bulk_list, bulk_list) {
		err = mlxsw_reg_trans_wait(trans);
		if (err && sum_err == 0)
			sum_err = err; /* first error to be returned */
	}
	return sum_err;
}
EXPORT_SYMBOL(mlxsw_reg_trans_bulk_wait);

1442 1443 1444 1445 1446
static int mlxsw_core_reg_access_cmd(struct mlxsw_core *mlxsw_core,
				     const struct mlxsw_reg_info *reg,
				     char *payload,
				     enum mlxsw_core_reg_access_type type)
{
1447
	enum mlxsw_emad_op_tlv_status status;
1448 1449 1450
	int err, n_retry;
	char *in_mbox, *out_mbox, *tmp;

1451 1452 1453 1454
	dev_dbg(mlxsw_core->bus_info->dev, "Reg cmd access (reg_id=%x(%s),type=%s)\n",
		reg->id, mlxsw_reg_id_str(reg->id),
		mlxsw_core_reg_access_type_str(type));

1455 1456 1457 1458 1459 1460 1461 1462 1463 1464
	in_mbox = mlxsw_cmd_mbox_alloc();
	if (!in_mbox)
		return -ENOMEM;

	out_mbox = mlxsw_cmd_mbox_alloc();
	if (!out_mbox) {
		err = -ENOMEM;
		goto free_in_mbox;
	}

1465 1466
	mlxsw_emad_pack_op_tlv(in_mbox, reg, type,
			       mlxsw_core_tid_get(mlxsw_core));
1467 1468 1469 1470 1471 1472 1473
	tmp = in_mbox + MLXSW_EMAD_OP_TLV_LEN * sizeof(u32);
	mlxsw_emad_pack_reg_tlv(tmp, reg, payload);

	n_retry = 0;
retry:
	err = mlxsw_cmd_access_reg(mlxsw_core, in_mbox, out_mbox);
	if (!err) {
1474 1475 1476 1477 1478 1479 1480
		err = mlxsw_emad_process_status(out_mbox, &status);
		if (err) {
			if (err == -EAGAIN && n_retry++ < MLXSW_EMAD_MAX_RETRY)
				goto retry;
			dev_err(mlxsw_core->bus_info->dev, "Reg cmd access status failed (status=%x(%s))\n",
				status, mlxsw_emad_op_tlv_status_str(status));
		}
1481 1482 1483 1484 1485 1486 1487 1488 1489
	}

	if (!err)
		memcpy(payload, mlxsw_emad_reg_payload(out_mbox),
		       reg->len);

	mlxsw_cmd_mbox_free(out_mbox);
free_in_mbox:
	mlxsw_cmd_mbox_free(in_mbox);
1490 1491 1492 1493
	if (err)
		dev_err(mlxsw_core->bus_info->dev, "Reg cmd access failed (reg_id=%x(%s),type=%s)\n",
			reg->id, mlxsw_reg_id_str(reg->id),
			mlxsw_core_reg_access_type_str(type));
1494 1495 1496
	return err;
}

1497 1498 1499 1500 1501 1502 1503 1504 1505
static void mlxsw_core_reg_access_cb(struct mlxsw_core *mlxsw_core,
				     char *payload, size_t payload_len,
				     unsigned long cb_priv)
{
	char *orig_payload = (char *) cb_priv;

	memcpy(orig_payload, payload, payload_len);
}

1506 1507 1508 1509 1510
static int mlxsw_core_reg_access(struct mlxsw_core *mlxsw_core,
				 const struct mlxsw_reg_info *reg,
				 char *payload,
				 enum mlxsw_core_reg_access_type type)
{
1511
	LIST_HEAD(bulk_list);
1512 1513 1514 1515 1516 1517 1518
	int err;

	/* During initialization EMAD interface is not available to us,
	 * so we default to command interface. We switch to EMAD interface
	 * after setting the appropriate traps.
	 */
	if (!mlxsw_core->emad.use_emad)
1519
		return mlxsw_core_reg_access_cmd(mlxsw_core, reg,
1520 1521
						 payload, type);

1522 1523 1524 1525
	err = mlxsw_core_reg_access_emad(mlxsw_core, reg,
					 payload, type, &bulk_list,
					 mlxsw_core_reg_access_cb,
					 (unsigned long) payload);
1526
	if (err)
1527 1528
		return err;
	return mlxsw_reg_trans_bulk_wait(&bulk_list);
1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546
}

int mlxsw_reg_query(struct mlxsw_core *mlxsw_core,
		    const struct mlxsw_reg_info *reg, char *payload)
{
	return mlxsw_core_reg_access(mlxsw_core, reg, payload,
				     MLXSW_CORE_REG_ACCESS_TYPE_QUERY);
}
EXPORT_SYMBOL(mlxsw_reg_query);

int mlxsw_reg_write(struct mlxsw_core *mlxsw_core,
		    const struct mlxsw_reg_info *reg, char *payload)
{
	return mlxsw_core_reg_access(mlxsw_core, reg, payload,
				     MLXSW_CORE_REG_ACCESS_TYPE_WRITE);
}
EXPORT_SYMBOL(mlxsw_reg_write);

1547 1548 1549 1550 1551 1552
void mlxsw_core_skb_receive(struct mlxsw_core *mlxsw_core, struct sk_buff *skb,
			    struct mlxsw_rx_info *rx_info)
{
	struct mlxsw_rx_listener_item *rxl_item;
	const struct mlxsw_rx_listener *rxl;
	struct mlxsw_core_pcpu_stats *pcpu_stats;
1553
	u8 local_port;
1554 1555
	bool found = false;

1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571
	if (rx_info->is_lag) {
		dev_dbg_ratelimited(mlxsw_core->bus_info->dev, "%s: lag_id = %d, lag_port_index = 0x%x\n",
				    __func__, rx_info->u.lag_id,
				    rx_info->trap_id);
		/* Upper layer does not care if the skb came from LAG or not,
		 * so just get the local_port for the lag port and push it up.
		 */
		local_port = mlxsw_core_lag_mapping_get(mlxsw_core,
							rx_info->u.lag_id,
							rx_info->lag_port_index);
	} else {
		local_port = rx_info->u.sys_port;
	}

	dev_dbg_ratelimited(mlxsw_core->bus_info->dev, "%s: local_port = %d, trap_id = 0x%x\n",
			    __func__, local_port, rx_info->trap_id);
1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614

	if ((rx_info->trap_id >= MLXSW_TRAP_ID_MAX) ||
	    (local_port >= MLXSW_PORT_MAX_PORTS))
		goto drop;

	rcu_read_lock();
	list_for_each_entry_rcu(rxl_item, &mlxsw_core->rx_listener_list, list) {
		rxl = &rxl_item->rxl;
		if ((rxl->local_port == MLXSW_PORT_DONT_CARE ||
		     rxl->local_port == local_port) &&
		    rxl->trap_id == rx_info->trap_id) {
			found = true;
			break;
		}
	}
	rcu_read_unlock();
	if (!found)
		goto drop;

	pcpu_stats = this_cpu_ptr(mlxsw_core->pcpu_stats);
	u64_stats_update_begin(&pcpu_stats->syncp);
	pcpu_stats->port_rx_packets[local_port]++;
	pcpu_stats->port_rx_bytes[local_port] += skb->len;
	pcpu_stats->trap_rx_packets[rx_info->trap_id]++;
	pcpu_stats->trap_rx_bytes[rx_info->trap_id] += skb->len;
	u64_stats_update_end(&pcpu_stats->syncp);

	rxl->func(skb, local_port, rxl_item->priv);
	return;

drop:
	if (rx_info->trap_id >= MLXSW_TRAP_ID_MAX)
		this_cpu_inc(mlxsw_core->pcpu_stats->trap_rx_invalid);
	else
		this_cpu_inc(mlxsw_core->pcpu_stats->trap_rx_dropped[rx_info->trap_id]);
	if (local_port >= MLXSW_PORT_MAX_PORTS)
		this_cpu_inc(mlxsw_core->pcpu_stats->port_rx_invalid);
	else
		this_cpu_inc(mlxsw_core->pcpu_stats->port_rx_dropped[local_port]);
	dev_kfree_skb(skb);
}
EXPORT_SYMBOL(mlxsw_core_skb_receive);

1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656
static int mlxsw_core_lag_mapping_index(struct mlxsw_core *mlxsw_core,
					u16 lag_id, u8 port_index)
{
	return mlxsw_core->driver->profile->max_port_per_lag * lag_id +
	       port_index;
}

void mlxsw_core_lag_mapping_set(struct mlxsw_core *mlxsw_core,
				u16 lag_id, u8 port_index, u8 local_port)
{
	int index = mlxsw_core_lag_mapping_index(mlxsw_core,
						 lag_id, port_index);

	mlxsw_core->lag.mapping[index] = local_port;
}
EXPORT_SYMBOL(mlxsw_core_lag_mapping_set);

u8 mlxsw_core_lag_mapping_get(struct mlxsw_core *mlxsw_core,
			      u16 lag_id, u8 port_index)
{
	int index = mlxsw_core_lag_mapping_index(mlxsw_core,
						 lag_id, port_index);

	return mlxsw_core->lag.mapping[index];
}
EXPORT_SYMBOL(mlxsw_core_lag_mapping_get);

void mlxsw_core_lag_mapping_clear(struct mlxsw_core *mlxsw_core,
				  u16 lag_id, u8 local_port)
{
	int i;

	for (i = 0; i < mlxsw_core->driver->profile->max_port_per_lag; i++) {
		int index = mlxsw_core_lag_mapping_index(mlxsw_core,
							 lag_id, i);

		if (mlxsw_core->lag.mapping[index] == local_port)
			mlxsw_core->lag.mapping[index] = 0;
	}
}
EXPORT_SYMBOL(mlxsw_core_lag_mapping_clear);

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struct mlxsw_resources *mlxsw_core_resources_get(struct mlxsw_core *mlxsw_core)
{
	return &mlxsw_core->resources;
}
EXPORT_SYMBOL(mlxsw_core_resources_get);

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int mlxsw_core_port_init(struct mlxsw_core *mlxsw_core,
			 struct mlxsw_core_port *mlxsw_core_port, u8 local_port,
			 struct net_device *dev, bool split, u32 split_group)
{
	struct devlink *devlink = priv_to_devlink(mlxsw_core);
	struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;

	if (split)
		devlink_port_split_set(devlink_port, split_group);
	devlink_port_type_eth_set(devlink_port, dev);
	return devlink_port_register(devlink, devlink_port, local_port);
}
EXPORT_SYMBOL(mlxsw_core_port_init);

void mlxsw_core_port_fini(struct mlxsw_core_port *mlxsw_core_port)
{
	struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;

	devlink_port_unregister(devlink_port);
}
EXPORT_SYMBOL(mlxsw_core_port_fini);

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static void mlxsw_core_buf_dump_dbg(struct mlxsw_core *mlxsw_core,
				    const char *buf, size_t size)
{
	__be32 *m = (__be32 *) buf;
	int i;
	int count = size / sizeof(__be32);

	for (i = count - 1; i >= 0; i--)
		if (m[i])
			break;
	i++;
	count = i ? i : 1;
	for (i = 0; i < count; i += 4)
		dev_dbg(mlxsw_core->bus_info->dev, "%04x - %08x %08x %08x %08x\n",
			i * 4, be32_to_cpu(m[i]), be32_to_cpu(m[i + 1]),
			be32_to_cpu(m[i + 2]), be32_to_cpu(m[i + 3]));
}

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int mlxsw_cmd_exec(struct mlxsw_core *mlxsw_core, u16 opcode, u8 opcode_mod,
		   u32 in_mod, bool out_mbox_direct,
		   char *in_mbox, size_t in_mbox_size,
		   char *out_mbox, size_t out_mbox_size)
{
	u8 status;
	int err;

	BUG_ON(in_mbox_size % sizeof(u32) || out_mbox_size % sizeof(u32));
	if (!mlxsw_core->bus->cmd_exec)
		return -EOPNOTSUPP;

	dev_dbg(mlxsw_core->bus_info->dev, "Cmd exec (opcode=%x(%s),opcode_mod=%x,in_mod=%x)\n",
		opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod, in_mod);
	if (in_mbox) {
		dev_dbg(mlxsw_core->bus_info->dev, "Input mailbox:\n");
		mlxsw_core_buf_dump_dbg(mlxsw_core, in_mbox, in_mbox_size);
	}

	err = mlxsw_core->bus->cmd_exec(mlxsw_core->bus_priv, opcode,
					opcode_mod, in_mod, out_mbox_direct,
					in_mbox, in_mbox_size,
					out_mbox, out_mbox_size, &status);

	if (err == -EIO && status != MLXSW_CMD_STATUS_OK) {
		dev_err(mlxsw_core->bus_info->dev, "Cmd exec failed (opcode=%x(%s),opcode_mod=%x,in_mod=%x,status=%x(%s))\n",
			opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod,
			in_mod, status, mlxsw_cmd_status_str(status));
	} else if (err == -ETIMEDOUT) {
		dev_err(mlxsw_core->bus_info->dev, "Cmd exec timed-out (opcode=%x(%s),opcode_mod=%x,in_mod=%x)\n",
			opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod,
			in_mod);
	}

	if (!err && out_mbox) {
		dev_dbg(mlxsw_core->bus_info->dev, "Output mailbox:\n");
		mlxsw_core_buf_dump_dbg(mlxsw_core, out_mbox, out_mbox_size);
	}
	return err;
}
EXPORT_SYMBOL(mlxsw_cmd_exec);

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int mlxsw_core_schedule_dw(struct delayed_work *dwork, unsigned long delay)
{
	return queue_delayed_work(mlxsw_wq, dwork, delay);
}
EXPORT_SYMBOL(mlxsw_core_schedule_dw);

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static int __init mlxsw_core_module_init(void)
{
1753 1754
	int err;

1755
	mlxsw_wq = alloc_workqueue(mlxsw_core_driver_name, WQ_MEM_RECLAIM, 0);
1756
	if (!mlxsw_wq)
1757
		return -ENOMEM;
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	mlxsw_core_dbg_root = debugfs_create_dir(mlxsw_core_driver_name, NULL);
	if (!mlxsw_core_dbg_root) {
		err = -ENOMEM;
		goto err_debugfs_create_dir;
	}
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	return 0;
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err_debugfs_create_dir:
	destroy_workqueue(mlxsw_wq);
	return err;
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}

static void __exit mlxsw_core_module_exit(void)
{
	debugfs_remove_recursive(mlxsw_core_dbg_root);
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	destroy_workqueue(mlxsw_wq);
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}

module_init(mlxsw_core_module_init);
module_exit(mlxsw_core_module_exit);

MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
MODULE_DESCRIPTION("Mellanox switch device core driver");