diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlxsw/core.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/core.c | 1295 |
1 files changed, 1295 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c new file mode 100644 index 0000000..dbcaf5d --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlxsw/core.c @@ -0,0 +1,1295 @@ +/* + * 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 (MLXSW_CORE_REG_ACCESS_TYPE_QUERY == type) + 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_RESPONSE == mlxsw_emad_op_tlv_r_get(op_tlv)); +} + +#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; + + 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); + return err; + } + + mlxsw_core->emad.trans_active = true; + 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); + mlxsw_core->emad.trans_active = false; + return -EIO; + } + + return 0; +} + +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_REG_HTGT_TRAP_GROUP_EMAD, + 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_reg_hpkt_pack(hpkt_pl, MLXSW_REG_HPKT_ACTION_DISCARD, + MLXSW_REG_HTGT_TRAP_GROUP_EMAD, + 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"); |
