--- /dev/null
+/*
+ * 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>
+#include <linux/wait.h>
+#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>
+#include <asm/byteorder.h>
+
+#include "core.h"
+#include "item.h"
+#include "cmd.h"
+#include "port.h"
+#include "trap.h"
+#include "emad.h"
+#include "reg.h"
+
+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;
+
+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;
+ struct list_head event_listener_list;
+ struct {
+ struct sk_buff *resp_skb;
+ u64 tid;
+ wait_queue_head_t wait;
+ bool trans_active;
+ struct mutex lock; /* One EMAD transaction at a time. */
+ bool use_emad;
+ } emad;
+ 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;
+ unsigned long driver_priv[0];
+ /* driver_priv has to be always the last item */
+};
+
+struct mlxsw_rx_listener_item {
+ struct list_head list;
+ struct mlxsw_rx_listener rxl;
+ void *priv;
+};
+
+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,
+ struct mlxsw_core *mlxsw_core)
+{
+ 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);
+ if (type == MLXSW_CORE_REG_ACCESS_TYPE_QUERY)
+ 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);
+ mlxsw_emad_op_tlv_tid_set(op_tlv, mlxsw_core->emad.tid);
+}
+
+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,
+ struct mlxsw_core *mlxsw_core)
+{
+ 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));
+ mlxsw_emad_pack_op_tlv(buf, reg, type, mlxsw_core);
+
+ 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);
+ return (mlxsw_emad_op_tlv_r_get(op_tlv) == MLXSW_EMAD_OP_TLV_RESPONSE);
+}
+
+#define MLXSW_EMAD_TIMEOUT_MS 200
+
+static int __mlxsw_emad_transmit(struct mlxsw_core *mlxsw_core,
+ struct sk_buff *skb,
+ const struct mlxsw_tx_info *tx_info)
+{
+ int err;
+ int ret;
+
+ mlxsw_core->emad.trans_active = true;
+
+ err = mlxsw_core_skb_transmit(mlxsw_core->driver_priv, skb, tx_info);
+ if (err) {
+ dev_err(mlxsw_core->bus_info->dev, "Failed to transmit EMAD (tid=%llx)\n",
+ mlxsw_core->emad.tid);
+ dev_kfree_skb(skb);
+ goto trans_inactive_out;
+ }
+
+ ret = wait_event_timeout(mlxsw_core->emad.wait,
+ !(mlxsw_core->emad.trans_active),
+ msecs_to_jiffies(MLXSW_EMAD_TIMEOUT_MS));
+ if (!ret) {
+ dev_warn(mlxsw_core->bus_info->dev, "EMAD timed-out (tid=%llx)\n",
+ mlxsw_core->emad.tid);
+ err = -EIO;
+ goto trans_inactive_out;
+ }
+
+ return 0;
+
+trans_inactive_out:
+ mlxsw_core->emad.trans_active = false;
+ return err;
+}
+
+static int mlxsw_emad_process_status(struct mlxsw_core *mlxsw_core,
+ char *op_tlv)
+{
+ enum mlxsw_emad_op_tlv_status status;
+ u64 tid;
+
+ status = mlxsw_emad_op_tlv_status_get(op_tlv);
+ tid = mlxsw_emad_op_tlv_tid_get(op_tlv);
+
+ switch (status) {
+ 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:
+ dev_warn(mlxsw_core->bus_info->dev, "Reg access status again (tid=%llx,status=%x(%s))\n",
+ tid, status, mlxsw_emad_op_tlv_status_str(status));
+ 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:
+ dev_err(mlxsw_core->bus_info->dev, "Reg access status failed (tid=%llx,status=%x(%s))\n",
+ tid, status, mlxsw_emad_op_tlv_status_str(status));
+ return -EIO;
+ }
+}
+
+static int mlxsw_emad_process_status_skb(struct mlxsw_core *mlxsw_core,
+ struct sk_buff *skb)
+{
+ return mlxsw_emad_process_status(mlxsw_core, mlxsw_emad_op_tlv(skb));
+}
+
+static int mlxsw_emad_transmit(struct mlxsw_core *mlxsw_core,
+ struct sk_buff *skb,
+ const struct mlxsw_tx_info *tx_info)
+{
+ struct sk_buff *trans_skb;
+ int n_retry;
+ int err;
+
+ n_retry = 0;
+retry:
+ /* We copy the EMAD to a new skb, since we might need
+ * to retransmit it in case of failure.
+ */
+ trans_skb = skb_copy(skb, GFP_KERNEL);
+ if (!trans_skb) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ err = __mlxsw_emad_transmit(mlxsw_core, trans_skb, tx_info);
+ if (!err) {
+ struct sk_buff *resp_skb = mlxsw_core->emad.resp_skb;
+
+ err = mlxsw_emad_process_status_skb(mlxsw_core, resp_skb);
+ if (err)
+ dev_kfree_skb(resp_skb);
+ if (!err || err != -EAGAIN)
+ goto out;
+ }
+ if (n_retry++ < MLXSW_EMAD_MAX_RETRY)
+ goto retry;
+
+out:
+ dev_kfree_skb(skb);
+ mlxsw_core->emad.tid++;
+ return err;
+}
+
+static void mlxsw_emad_rx_listener_func(struct sk_buff *skb, u8 local_port,
+ void *priv)
+{
+ struct mlxsw_core *mlxsw_core = priv;
+
+ if (mlxsw_emad_is_resp(skb) &&
+ mlxsw_core->emad.trans_active &&
+ mlxsw_emad_get_tid(skb) == mlxsw_core->emad.tid) {
+ mlxsw_core->emad.resp_skb = skb;
+ mlxsw_core->emad.trans_active = false;
+ wake_up(&mlxsw_core->emad.wait);
+ } else {
+ dev_kfree_skb(skb);
+ }
+}
+
+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)
+{
+ 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.
+ */
+ get_random_bytes(&mlxsw_core->emad.tid, 4);
+ mlxsw_core->emad.tid = mlxsw_core->emad.tid << 32;
+
+ init_waitqueue_head(&mlxsw_core->emad.wait);
+ mlxsw_core->emad.trans_active = false;
+ mutex_init(&mlxsw_core->emad.lock);
+
+ 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];
+
+ mlxsw_core->emad.use_emad = false;
+ 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;
+}
+
+/*****************
+ * 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
+};
+
+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]));
+}
+
+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);
+}
+
+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;
+ 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;
+ mlxsw_core = kzalloc(alloc_size, GFP_KERNEL);
+ if (!mlxsw_core) {
+ err = -ENOMEM;
+ goto err_core_alloc;
+ }
+
+ INIT_LIST_HEAD(&mlxsw_core->rx_listener_list);
+ INIT_LIST_HEAD(&mlxsw_core->event_listener_list);
+ 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;
+ }
+
+ err = mlxsw_bus->init(bus_priv, mlxsw_core, mlxsw_driver->profile);
+ if (err)
+ goto err_bus_init;
+
+ err = mlxsw_emad_init(mlxsw_core);
+ if (err)
+ goto err_emad_init;
+
+ err = mlxsw_driver->init(mlxsw_core->driver_priv, mlxsw_core,
+ mlxsw_bus_info);
+ if (err)
+ goto err_driver_init;
+
+ err = mlxsw_core_debugfs_init(mlxsw_core);
+ if (err)
+ goto err_debugfs_init;
+
+ return 0;
+
+err_debugfs_init:
+ mlxsw_core->driver->fini(mlxsw_core->driver_priv);
+err_driver_init:
+ mlxsw_emad_fini(mlxsw_core);
+err_emad_init:
+ mlxsw_bus->fini(bus_priv);
+err_bus_init:
+ free_percpu(mlxsw_core->pcpu_stats);
+err_alloc_stats:
+ kfree(mlxsw_core);
+err_core_alloc:
+ 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;
+
+ mlxsw_core_debugfs_fini(mlxsw_core);
+ mlxsw_core->driver->fini(mlxsw_core->driver_priv);
+ mlxsw_emad_fini(mlxsw_core);
+ mlxsw_core->bus->fini(mlxsw_core->bus_priv);
+ free_percpu(mlxsw_core->pcpu_stats);
+ kfree(mlxsw_core);
+ mlxsw_core_driver_put(device_kind);
+}
+EXPORT_SYMBOL(mlxsw_core_bus_device_unregister);
+
+static struct mlxsw_core *__mlxsw_core_get(void *driver_priv)
+{
+ return container_of(driver_priv, struct mlxsw_core, driver_priv);
+}
+
+bool mlxsw_core_skb_transmit_busy(void *driver_priv,
+ const struct mlxsw_tx_info *tx_info)
+{
+ struct mlxsw_core *mlxsw_core = __mlxsw_core_get(driver_priv);
+
+ return mlxsw_core->bus->skb_transmit_busy(mlxsw_core->bus_priv,
+ tx_info);
+}
+EXPORT_SYMBOL(mlxsw_core_skb_transmit_busy);
+
+int mlxsw_core_skb_transmit(void *driver_priv, struct sk_buff *skb,
+ const struct mlxsw_tx_info *tx_info)
+{
+ struct mlxsw_core *mlxsw_core = __mlxsw_core_get(driver_priv);
+
+ 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);
+
+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(®, 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);
+
+static int mlxsw_core_reg_access_emad(struct mlxsw_core *mlxsw_core,
+ const struct mlxsw_reg_info *reg,
+ char *payload,
+ enum mlxsw_core_reg_access_type type)
+{
+ int err;
+ char *op_tlv;
+ struct sk_buff *skb;
+ struct mlxsw_tx_info tx_info = {
+ .local_port = MLXSW_PORT_CPU_PORT,
+ .is_emad = true,
+ };
+
+ skb = mlxsw_emad_alloc(mlxsw_core, reg->len);
+ if (!skb)
+ return -ENOMEM;
+
+ mlxsw_emad_construct(skb, reg, payload, type, mlxsw_core);
+ mlxsw_core->driver->txhdr_construct(skb, &tx_info);
+
+ dev_dbg(mlxsw_core->bus_info->dev, "EMAD send (tid=%llx)\n",
+ mlxsw_core->emad.tid);
+ mlxsw_core_buf_dump_dbg(mlxsw_core, skb->data, skb->len);
+
+ err = mlxsw_emad_transmit(mlxsw_core, skb, &tx_info);
+ if (!err) {
+ op_tlv = mlxsw_emad_op_tlv(mlxsw_core->emad.resp_skb);
+ memcpy(payload, mlxsw_emad_reg_payload(op_tlv),
+ reg->len);
+
+ dev_dbg(mlxsw_core->bus_info->dev, "EMAD recv (tid=%llx)\n",
+ mlxsw_core->emad.tid - 1);
+ mlxsw_core_buf_dump_dbg(mlxsw_core,
+ mlxsw_core->emad.resp_skb->data,
+ mlxsw_core->emad.resp_skb->len);
+
+ dev_kfree_skb(mlxsw_core->emad.resp_skb);
+ }
+
+ return err;
+}
+
+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)
+{
+ int err, n_retry;
+ char *in_mbox, *out_mbox, *tmp;
+
+ 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;
+ }
+
+ mlxsw_emad_pack_op_tlv(in_mbox, reg, type, mlxsw_core);
+ 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) {
+ err = mlxsw_emad_process_status(mlxsw_core, out_mbox);
+ if (err == -EAGAIN && n_retry++ < MLXSW_EMAD_MAX_RETRY)
+ goto retry;
+ }
+
+ if (!err)
+ memcpy(payload, mlxsw_emad_reg_payload(out_mbox),
+ reg->len);
+
+ mlxsw_core->emad.tid++;
+ mlxsw_cmd_mbox_free(out_mbox);
+free_in_mbox:
+ mlxsw_cmd_mbox_free(in_mbox);
+ return err;
+}
+
+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)
+{
+ u64 cur_tid;
+ int err;
+
+ if (mutex_lock_interruptible(&mlxsw_core->emad.lock)) {
+ dev_err(mlxsw_core->bus_info->dev, "Reg access interrupted (reg_id=%x(%s),type=%s)\n",
+ reg->id, mlxsw_reg_id_str(reg->id),
+ mlxsw_core_reg_access_type_str(type));
+ return -EINTR;
+ }
+
+ cur_tid = mlxsw_core->emad.tid;
+ dev_dbg(mlxsw_core->bus_info->dev, "Reg access (tid=%llx,reg_id=%x(%s),type=%s)\n",
+ cur_tid, reg->id, mlxsw_reg_id_str(reg->id),
+ mlxsw_core_reg_access_type_str(type));
+
+ /* 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)
+ err = mlxsw_core_reg_access_cmd(mlxsw_core, reg,
+ payload, type);
+ else
+ err = mlxsw_core_reg_access_emad(mlxsw_core, reg,
+ payload, type);
+
+ if (err)
+ dev_err(mlxsw_core->bus_info->dev, "Reg access failed (tid=%llx,reg_id=%x(%s),type=%s)\n",
+ cur_tid, reg->id, mlxsw_reg_id_str(reg->id),
+ mlxsw_core_reg_access_type_str(type));
+
+ mutex_unlock(&mlxsw_core->emad.lock);
+ return err;
+}
+
+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);
+
+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;
+ u8 local_port = rx_info->sys_port;
+ bool found = false;
+
+ dev_dbg_ratelimited(mlxsw_core->bus_info->dev, "%s: sys_port = %d, trap_id = 0x%x\n",
+ __func__, rx_info->sys_port, rx_info->trap_id);
+
+ 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);
+
+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);
+
+static int __init mlxsw_core_module_init(void)
+{
+ mlxsw_core_dbg_root = debugfs_create_dir(mlxsw_core_driver_name, NULL);
+ if (!mlxsw_core_dbg_root)
+ return -ENOMEM;
+ return 0;
+}
+
+static void __exit mlxsw_core_module_exit(void)
+{
+ debugfs_remove_recursive(mlxsw_core_dbg_root);
+}
+
+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");
Code Review / kvmfornfv.git / blobdiff