| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jiri Pirko | 4738 | 54.58% | 23 | 41.07% |
| Ido Schimmel | 2740 | 31.56% | 11 | 19.64% |
| Nogah Frankel | 374 | 4.31% | 5 | 8.93% |
| Shalom Toledo | 252 | 2.90% | 4 | 7.14% |
| Arkadi Sharshevsky | 249 | 2.87% | 3 | 5.36% |
| Elad Raz | 192 | 2.21% | 2 | 3.57% |
| Vadim Pasternak | 46 | 0.53% | 2 | 3.57% |
| David Ahern | 37 | 0.43% | 2 | 3.57% |
| Ivan Vecera | 35 | 0.40% | 1 | 1.79% |
| Christophe Jaillet | 9 | 0.10% | 1 | 1.79% |
| Bhaktipriya Shridhar | 5 | 0.06% | 1 | 1.79% |
| Or Gerlitz | 4 | 0.05% | 1 | 1.79% |
| Total | 8681 | 56 |
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /* Copyright (c) 2015-2018 Mellanox Technologies. All rights reserved */ #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/netdevice.h> #include <linux/completion.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 <linux/workqueue.h> #include <asm/byteorder.h> #include <net/devlink.h> #include <trace/events/devlink.h> #include "core.h" #include "item.h" #include "cmd.h" #include "port.h" #include "trap.h" #include "emad.h" #include "reg.h" #include "resources.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 workqueue_struct *mlxsw_wq; static struct workqueue_struct *mlxsw_owq; struct mlxsw_core_port { struct devlink_port devlink_port; void *port_driver_priv; u8 local_port; }; void *mlxsw_core_port_driver_priv(struct mlxsw_core_port *mlxsw_core_port) { return mlxsw_core_port->port_driver_priv; } EXPORT_SYMBOL(mlxsw_core_port_driver_priv); static bool mlxsw_core_port_check(struct mlxsw_core_port *mlxsw_core_port) { return mlxsw_core_port->port_driver_priv != NULL; } struct mlxsw_core { struct mlxsw_driver *driver; const struct mlxsw_bus *bus; void *bus_priv; const struct mlxsw_bus_info *bus_info; struct workqueue_struct *emad_wq; struct list_head rx_listener_list; struct list_head event_listener_list; struct { atomic64_t tid; struct list_head trans_list; spinlock_t trans_list_lock; /* protects trans_list writes */ bool use_emad; } emad; struct { u8 *mapping; /* lag_id+port_index to local_port mapping */ } lag; struct mlxsw_res res; struct mlxsw_hwmon *hwmon; struct mlxsw_thermal *thermal; struct mlxsw_core_port *ports; unsigned int max_ports; bool reload_fail; bool fw_flash_in_progress; unsigned long driver_priv[0]; /* driver_priv has to be always the last item */ }; #define MLXSW_PORT_MAX_PORTS_DEFAULT 0x40 static int mlxsw_ports_init(struct mlxsw_core *mlxsw_core) { /* Switch ports are numbered from 1 to queried value */ if (MLXSW_CORE_RES_VALID(mlxsw_core, MAX_SYSTEM_PORT)) mlxsw_core->max_ports = MLXSW_CORE_RES_GET(mlxsw_core, MAX_SYSTEM_PORT) + 1; else mlxsw_core->max_ports = MLXSW_PORT_MAX_PORTS_DEFAULT + 1; mlxsw_core->ports = kcalloc(mlxsw_core->max_ports, sizeof(struct mlxsw_core_port), GFP_KERNEL); if (!mlxsw_core->ports) return -ENOMEM; return 0; } static void mlxsw_ports_fini(struct mlxsw_core *mlxsw_core) { kfree(mlxsw_core->ports); } unsigned int mlxsw_core_max_ports(const struct mlxsw_core *mlxsw_core) { return mlxsw_core->max_ports; } EXPORT_SYMBOL(mlxsw_core_max_ports); void *mlxsw_core_driver_priv(struct mlxsw_core *mlxsw_core) { return mlxsw_core->driver_priv; } EXPORT_SYMBOL(mlxsw_core_driver_priv); 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, u64 tid) { 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, 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, u64 tid) { 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, tid); 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); } static int mlxsw_emad_process_status(char *op_tlv, enum mlxsw_emad_op_tlv_status *p_status) { *p_status = mlxsw_emad_op_tlv_status_get(op_tlv); switch (*p_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: 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; } } static int mlxsw_emad_process_status_skb(struct sk_buff *skb, enum mlxsw_emad_op_tlv_status *p_status) { 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_DURING_FW_FLASH_MS 3000 #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); if (trans->core->fw_flash_in_progress) timeout = msecs_to_jiffies(MLXSW_EMAD_TIMEOUT_DURING_FW_FLASH_MS); queue_delayed_work(trans->core->emad_wq, &trans->timeout_dw, timeout); } static int mlxsw_emad_transmit(struct mlxsw_core *mlxsw_core, struct mlxsw_reg_trans *trans) { struct sk_buff *skb; int err; skb = skb_copy(trans->tx_skb, GFP_KERNEL); if (!skb) return -ENOMEM; trace_devlink_hwmsg(priv_to_devlink(mlxsw_core), false, 0, skb->data + mlxsw_core->driver->txhdr_len, skb->len - mlxsw_core->driver->txhdr_len); atomic_set(&trans->active, 1); err = mlxsw_core_skb_transmit(mlxsw_core, skb, &trans->tx_info); if (err) { dev_kfree_skb(skb); return err; } mlxsw_emad_trans_timeout_schedule(trans); return 0; } 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; if (trans->retries < MLXSW_EMAD_MAX_RETRY) { trans->retries++; err = mlxsw_emad_transmit(trans->core, trans); if (err == 0) return; } else { err = -EIO; } mlxsw_emad_trans_finish(trans, err); } 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); } 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 */ static void mlxsw_emad_rx_listener_func(struct sk_buff *skb, u8 local_port, void *priv) { struct mlxsw_core *mlxsw_core = priv; struct mlxsw_reg_trans *trans; trace_devlink_hwmsg(priv_to_devlink(mlxsw_core), true, 0, skb->data, skb->len); 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; } } free_skb: dev_kfree_skb(skb); } static const struct mlxsw_listener mlxsw_emad_rx_listener = MLXSW_RXL(mlxsw_emad_rx_listener_func, ETHEMAD, TRAP_TO_CPU, false, EMAD, DISCARD); static int mlxsw_emad_init(struct mlxsw_core *mlxsw_core) { struct workqueue_struct *emad_wq; u64 tid; int err; if (!(mlxsw_core->bus->features & MLXSW_BUS_F_TXRX)) return 0; emad_wq = alloc_workqueue("mlxsw_core_emad", WQ_MEM_RECLAIM, 0); if (!emad_wq) return -ENOMEM; mlxsw_core->emad_wq = emad_wq; /* 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(&tid, 4); tid <<= 32; atomic64_set(&mlxsw_core->emad.tid, tid); INIT_LIST_HEAD(&mlxsw_core->emad.trans_list); spin_lock_init(&mlxsw_core->emad.trans_list_lock); err = mlxsw_core_trap_register(mlxsw_core, &mlxsw_emad_rx_listener, mlxsw_core); if (err) return err; err = mlxsw_core->driver->basic_trap_groups_set(mlxsw_core); if (err) goto err_emad_trap_set; mlxsw_core->emad.use_emad = true; return 0; err_emad_trap_set: mlxsw_core_trap_unregister(mlxsw_core, &mlxsw_emad_rx_listener, mlxsw_core); destroy_workqueue(mlxsw_core->emad_wq); return err; } static void mlxsw_emad_fini(struct mlxsw_core *mlxsw_core) { if (!(mlxsw_core->bus->features & MLXSW_BUS_F_TXRX)) return; mlxsw_core->emad.use_emad = false; mlxsw_core_trap_unregister(mlxsw_core, &mlxsw_emad_rx_listener, mlxsw_core); destroy_workqueue(mlxsw_core->emad_wq); } 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; } 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", 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; } /***************** * Core functions *****************/ 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); spin_unlock(&mlxsw_core_driver_list_lock); return mlxsw_driver; } static int mlxsw_devlink_port_split(struct devlink *devlink, unsigned int port_index, unsigned int count, struct netlink_ext_ack *extack) { struct mlxsw_core *mlxsw_core = devlink_priv(devlink); if (port_index >= mlxsw_core->max_ports) { NL_SET_ERR_MSG_MOD(extack, "Port index exceeds maximum number of ports"); return -EINVAL; } if (!mlxsw_core->driver->port_split) return -EOPNOTSUPP; return mlxsw_core->driver->port_split(mlxsw_core, port_index, count, extack); } static int mlxsw_devlink_port_unsplit(struct devlink *devlink, unsigned int port_index, struct netlink_ext_ack *extack) { struct mlxsw_core *mlxsw_core = devlink_priv(devlink); if (port_index >= mlxsw_core->max_ports) { NL_SET_ERR_MSG_MOD(extack, "Port index exceeds maximum number of ports"); return -EINVAL; } if (!mlxsw_core->driver->port_unsplit) return -EOPNOTSUPP; return mlxsw_core->driver->port_unsplit(mlxsw_core, port_index, extack); } 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_port_type_set(struct devlink_port *devlink_port, enum devlink_port_type port_type) { 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->port_type_set) return -EOPNOTSUPP; return mlxsw_driver->port_type_set(mlxsw_core, mlxsw_core_port->local_port, port_type); } 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 || !mlxsw_core_port_check(mlxsw_core_port)) 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 || !mlxsw_core_port_check(mlxsw_core_port)) 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 || !mlxsw_core_port_check(mlxsw_core_port)) 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 || !mlxsw_core_port_check(mlxsw_core_port)) return -EOPNOTSUPP; return mlxsw_driver->sb_tc_pool_bind_set(mlxsw_core_port, sb_index, tc_index, pool_type, pool_index, threshold); } 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 || !mlxsw_core_port_check(mlxsw_core_port)) 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 || !mlxsw_core_port_check(mlxsw_core_port)) return -EOPNOTSUPP; return mlxsw_driver->sb_occ_tc_port_bind_get(mlxsw_core_port, sb_index, tc_index, pool_type, p_cur, p_max); } static int mlxsw_devlink_core_bus_device_reload(struct devlink *devlink, struct netlink_ext_ack *extack) { struct mlxsw_core *mlxsw_core = devlink_priv(devlink); int err; if (!(mlxsw_core->bus->features & MLXSW_BUS_F_RESET)) return -EOPNOTSUPP; mlxsw_core_bus_device_unregister(mlxsw_core, true); err = mlxsw_core_bus_device_register(mlxsw_core->bus_info, mlxsw_core->bus, mlxsw_core->bus_priv, true, devlink); mlxsw_core->reload_fail = !!err; return err; } static const struct devlink_ops mlxsw_devlink_ops = { .reload = mlxsw_devlink_core_bus_device_reload, .port_type_set = mlxsw_devlink_port_type_set, .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, }; static int __mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info, const struct mlxsw_bus *mlxsw_bus, void *bus_priv, bool reload, struct devlink *devlink) { const char *device_kind = mlxsw_bus_info->device_kind; struct mlxsw_core *mlxsw_core; struct mlxsw_driver *mlxsw_driver; struct mlxsw_res *res; size_t alloc_size; int err; mlxsw_driver = mlxsw_core_driver_get(device_kind); if (!mlxsw_driver) return -EINVAL; if (!reload) { alloc_size = sizeof(*mlxsw_core) + mlxsw_driver->priv_size; devlink = devlink_alloc(&mlxsw_devlink_ops, alloc_size); if (!devlink) { err = -ENOMEM; goto err_devlink_alloc; } } mlxsw_core = devlink_priv(devlink); 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; res = mlxsw_driver->res_query_enabled ? &mlxsw_core->res : NULL; err = mlxsw_bus->init(bus_priv, mlxsw_core, mlxsw_driver->profile, res); if (err) goto err_bus_init; if (mlxsw_driver->resources_register && !reload) { err = mlxsw_driver->resources_register(mlxsw_core); if (err) goto err_register_resources; } err = mlxsw_ports_init(mlxsw_core); if (err) goto err_ports_init; if (MLXSW_CORE_RES_VALID(mlxsw_core, MAX_LAG) && MLXSW_CORE_RES_VALID(mlxsw_core, MAX_LAG_MEMBERS)) { alloc_size = sizeof(u8) * MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG) * MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS); mlxsw_core->lag.mapping = kzalloc(alloc_size, GFP_KERNEL); if (!mlxsw_core->lag.mapping) { err = -ENOMEM; goto err_alloc_lag_mapping; } } err = mlxsw_emad_init(mlxsw_core); if (err) goto err_emad_init; if (!reload) { err = devlink_register(devlink, mlxsw_bus_info->dev); if (err) goto err_devlink_register; } if (mlxsw_driver->params_register && !reload) { err = mlxsw_driver->params_register(mlxsw_core); if (err) goto err_register_params; } err = mlxsw_hwmon_init(mlxsw_core, mlxsw_bus_info, &mlxsw_core->hwmon); if (err) goto err_hwmon_init; err = mlxsw_thermal_init(mlxsw_core, mlxsw_bus_info, &mlxsw_core->thermal); if (err) goto err_thermal_init; if (mlxsw_driver->init) { err = mlxsw_driver->init(mlxsw_core, mlxsw_bus_info); if (err) goto err_driver_init; } return 0; err_driver_init: mlxsw_thermal_fini(mlxsw_core->thermal); err_thermal_init: mlxsw_hwmon_fini(mlxsw_core->hwmon); err_hwmon_init: if (mlxsw_driver->params_unregister && !reload) mlxsw_driver->params_unregister(mlxsw_core); err_register_params: if (!reload) devlink_unregister(devlink); err_devlink_register: mlxsw_emad_fini(mlxsw_core); err_emad_init: kfree(mlxsw_core->lag.mapping); err_alloc_lag_mapping: mlxsw_ports_fini(mlxsw_core); err_ports_init: if (!reload) devlink_resources_unregister(devlink, NULL); err_register_resources: mlxsw_bus->fini(bus_priv); err_bus_init: if (!reload) devlink_free(devlink); err_devlink_alloc: return err; } int mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info, const struct mlxsw_bus *mlxsw_bus, void *bus_priv, bool reload, struct devlink *devlink) { bool called_again = false; int err; again: err = __mlxsw_core_bus_device_register(mlxsw_bus_info, mlxsw_bus, bus_priv, reload, devlink); /* -EAGAIN is returned in case the FW was updated. FW needs * a reset, so lets try to call __mlxsw_core_bus_device_register() * again. */ if (err == -EAGAIN && !called_again) { called_again = true; goto again; } return err; } EXPORT_SYMBOL(mlxsw_core_bus_device_register); void mlxsw_core_bus_device_unregister(struct mlxsw_core *mlxsw_core, bool reload) { struct devlink *devlink = priv_to_devlink(mlxsw_core); if (mlxsw_core->reload_fail) { if (!reload) /* Only the parts that were not de-initialized in the * failed reload attempt need to be de-initialized. */ goto reload_fail_deinit; else return; } if (mlxsw_core->driver->fini) mlxsw_core->driver->fini(mlxsw_core); mlxsw_thermal_fini(mlxsw_core->thermal); mlxsw_hwmon_fini(mlxsw_core->hwmon); if (mlxsw_core->driver->params_unregister && !reload) mlxsw_core->driver->params_unregister(mlxsw_core); if (!reload) devlink_unregister(devlink); mlxsw_emad_fini(mlxsw_core); kfree(mlxsw_core->lag.mapping); mlxsw_ports_fini(mlxsw_core); if (!reload) devlink_resources_unregister(devlink, NULL); mlxsw_core->bus->fini(mlxsw_core->bus_priv); return; reload_fail_deinit: if (mlxsw_core->driver->params_unregister) mlxsw_core->driver->params_unregister(mlxsw_core); devlink_unregister(devlink); devlink_resources_unregister(devlink, NULL); devlink_free(devlink); } EXPORT_SYMBOL(mlxsw_core_bus_device_unregister); bool mlxsw_core_skb_transmit_busy(struct mlxsw_core *mlxsw_core, 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); int mlxsw_core_skb_transmit(struct mlxsw_core *mlxsw_core, struct sk_buff *skb, 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); 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_listener_register(struct mlxsw_core *mlxsw_core, const struct mlxsw_listener *listener, void *priv) { if (listener->is_event) return mlxsw_core_event_listener_register(mlxsw_core, &listener->u.event_listener, priv); else return mlxsw_core_rx_listener_register(mlxsw_core, &listener->u.rx_listener, priv); } static void mlxsw_core_listener_unregister(struct mlxsw_core *mlxsw_core, const struct mlxsw_listener *listener, void *priv) { if (listener->is_event) mlxsw_core_event_listener_unregister(mlxsw_core, &listener->u.event_listener, priv); else mlxsw_core_rx_listener_unregister(mlxsw_core, &listener->u.rx_listener, priv); } int mlxsw_core_trap_register(struct mlxsw_core *mlxsw_core, const struct mlxsw_listener *listener, void *priv) { char hpkt_pl[MLXSW_REG_HPKT_LEN]; int err; err = mlxsw_core_listener_register(mlxsw_core, listener, priv); if (err) return err; mlxsw_reg_hpkt_pack(hpkt_pl, listener->action, listener->trap_id, listener->trap_group, listener->is_ctrl); err = mlxsw_reg_write(mlxsw_core, MLXSW_REG(hpkt), hpkt_pl); if (err) goto err_trap_set; return 0; err_trap_set: mlxsw_core_listener_unregister(mlxsw_core, listener, priv); return err; } EXPORT_SYMBOL(mlxsw_core_trap_register); void mlxsw_core_trap_unregister(struct mlxsw_core *mlxsw_core, const struct mlxsw_listener *listener, void *priv) { char hpkt_pl[MLXSW_REG_HPKT_LEN]; if (!listener->is_event) { mlxsw_reg_hpkt_pack(hpkt_pl, listener->unreg_action, listener->trap_id, listener->trap_group, listener->is_ctrl); mlxsw_reg_write(mlxsw_core, MLXSW_REG(hpkt), hpkt_pl); } mlxsw_core_listener_unregister(mlxsw_core, listener, priv); } EXPORT_SYMBOL(mlxsw_core_trap_unregister); static u64 mlxsw_core_tid_get(struct mlxsw_core *mlxsw_core) { return atomic64_inc_return(&mlxsw_core->emad.tid); } 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, struct list_head *bulk_list, mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv) { u64 tid = mlxsw_core_tid_get(mlxsw_core); struct mlxsw_reg_trans *trans; int err; trans = kzalloc(sizeof(*trans), GFP_KERNEL); if (!trans) return -ENOMEM; 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; } 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); 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); static int mlxsw_reg_trans_wait(struct mlxsw_reg_trans *trans) { struct mlxsw_core *mlxsw_core = trans->core; int err; wait_for_completion(&trans->completion); cancel_delayed_work_sync(&trans->timeout_dw); err = trans->err; 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); return err; } 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); 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) { enum mlxsw_emad_op_tlv_status status; int err, n_retry; bool reset_ok; char *in_mbox, *out_mbox, *tmp; 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)); 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_tid_get(mlxsw_core)); tmp = in_mbox + MLXSW_EMAD_OP_TLV_LEN * sizeof(u32); mlxsw_emad_pack_reg_tlv(tmp, reg, payload); /* There is a special treatment needed for MRSR (reset) register. * The command interface will return error after the command * is executed, so tell the lower layer to expect it * and cope accordingly. */ reset_ok = reg->id == MLXSW_REG_MRSR_ID; n_retry = 0; retry: err = mlxsw_cmd_access_reg(mlxsw_core, reset_ok, in_mbox, out_mbox); if (!err) { 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)); } } 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); 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)); return err; } 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); } 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) { LIST_HEAD(bulk_list); 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) return mlxsw_core_reg_access_cmd(mlxsw_core, reg, payload, type); err = mlxsw_core_reg_access_emad(mlxsw_core, reg, payload, type, &bulk_list, mlxsw_core_reg_access_cb, (unsigned long) payload); if (err) return err; return mlxsw_reg_trans_bulk_wait(&bulk_list); } 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; u8 local_port; bool found = false; 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); if ((rx_info->trap_id >= MLXSW_TRAP_ID_MAX) || (local_port >= mlxsw_core->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; rxl->func(skb, local_port, rxl_item->priv); return; drop: dev_kfree_skb(skb); } EXPORT_SYMBOL(mlxsw_core_skb_receive); static int mlxsw_core_lag_mapping_index(struct mlxsw_core *mlxsw_core, u16 lag_id, u8 port_index) { return MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS) * 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_RES_GET(mlxsw_core, MAX_LAG_MEMBERS); 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); bool mlxsw_core_res_valid(struct mlxsw_core *mlxsw_core, enum mlxsw_res_id res_id) { return mlxsw_res_valid(&mlxsw_core->res, res_id); } EXPORT_SYMBOL(mlxsw_core_res_valid); u64 mlxsw_core_res_get(struct mlxsw_core *mlxsw_core, enum mlxsw_res_id res_id) { return mlxsw_res_get(&mlxsw_core->res, res_id); } EXPORT_SYMBOL(mlxsw_core_res_get); int mlxsw_core_port_init(struct mlxsw_core *mlxsw_core, u8 local_port) { struct devlink *devlink = priv_to_devlink(mlxsw_core); struct mlxsw_core_port *mlxsw_core_port = &mlxsw_core->ports[local_port]; struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; int err; mlxsw_core_port->local_port = local_port; err = devlink_port_register(devlink, devlink_port, local_port); if (err) memset(mlxsw_core_port, 0, sizeof(*mlxsw_core_port)); return err; } EXPORT_SYMBOL(mlxsw_core_port_init); void mlxsw_core_port_fini(struct mlxsw_core *mlxsw_core, u8 local_port) { struct mlxsw_core_port *mlxsw_core_port = &mlxsw_core->ports[local_port]; struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; devlink_port_unregister(devlink_port); memset(mlxsw_core_port, 0, sizeof(*mlxsw_core_port)); } EXPORT_SYMBOL(mlxsw_core_port_fini); void mlxsw_core_port_eth_set(struct mlxsw_core *mlxsw_core, u8 local_port, void *port_driver_priv, struct net_device *dev, u32 port_number, bool split, u32 split_port_subnumber) { struct mlxsw_core_port *mlxsw_core_port = &mlxsw_core->ports[local_port]; struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; mlxsw_core_port->port_driver_priv = port_driver_priv; devlink_port_attrs_set(devlink_port, DEVLINK_PORT_FLAVOUR_PHYSICAL, port_number, split, split_port_subnumber); devlink_port_type_eth_set(devlink_port, dev); } EXPORT_SYMBOL(mlxsw_core_port_eth_set); void mlxsw_core_port_ib_set(struct mlxsw_core *mlxsw_core, u8 local_port, void *port_driver_priv) { struct mlxsw_core_port *mlxsw_core_port = &mlxsw_core->ports[local_port]; struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; mlxsw_core_port->port_driver_priv = port_driver_priv; devlink_port_type_ib_set(devlink_port, NULL); } EXPORT_SYMBOL(mlxsw_core_port_ib_set); void mlxsw_core_port_clear(struct mlxsw_core *mlxsw_core, u8 local_port, void *port_driver_priv) { struct mlxsw_core_port *mlxsw_core_port = &mlxsw_core->ports[local_port]; struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; mlxsw_core_port->port_driver_priv = port_driver_priv; devlink_port_type_clear(devlink_port); } EXPORT_SYMBOL(mlxsw_core_port_clear); enum devlink_port_type mlxsw_core_port_type_get(struct mlxsw_core *mlxsw_core, u8 local_port) { struct mlxsw_core_port *mlxsw_core_port = &mlxsw_core->ports[local_port]; struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; return devlink_port->type; } EXPORT_SYMBOL(mlxsw_core_port_type_get); int mlxsw_core_port_get_phys_port_name(struct mlxsw_core *mlxsw_core, u8 local_port, char *name, size_t len) { struct mlxsw_core_port *mlxsw_core_port = &mlxsw_core->ports[local_port]; struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; return devlink_port_get_phys_port_name(devlink_port, name, len); } EXPORT_SYMBOL(mlxsw_core_port_get_phys_port_name); 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_cmd_exec(struct mlxsw_core *mlxsw_core, u16 opcode, u8 opcode_mod, u32 in_mod, bool out_mbox_direct, bool reset_ok, 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 && out_mbox) { dev_dbg(mlxsw_core->bus_info->dev, "Output mailbox:\n"); mlxsw_core_buf_dump_dbg(mlxsw_core, out_mbox, out_mbox_size); } if (reset_ok && err == -EIO && status == MLXSW_CMD_STATUS_RUNNING_RESET) { err = 0; } else 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); } return err; } EXPORT_SYMBOL(mlxsw_cmd_exec); 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); bool mlxsw_core_schedule_work(struct work_struct *work) { return queue_work(mlxsw_owq, work); } EXPORT_SYMBOL(mlxsw_core_schedule_work); void mlxsw_core_flush_owq(void) { flush_workqueue(mlxsw_owq); } EXPORT_SYMBOL(mlxsw_core_flush_owq); int mlxsw_core_kvd_sizes_get(struct mlxsw_core *mlxsw_core, const struct mlxsw_config_profile *profile, u64 *p_single_size, u64 *p_double_size, u64 *p_linear_size) { struct mlxsw_driver *driver = mlxsw_core->driver; if (!driver->kvd_sizes_get) return -EINVAL; return driver->kvd_sizes_get(mlxsw_core, profile, p_single_size, p_double_size, p_linear_size); } EXPORT_SYMBOL(mlxsw_core_kvd_sizes_get); void mlxsw_core_fw_flash_start(struct mlxsw_core *mlxsw_core) { mlxsw_core->fw_flash_in_progress = true; } EXPORT_SYMBOL(mlxsw_core_fw_flash_start); void mlxsw_core_fw_flash_end(struct mlxsw_core *mlxsw_core) { mlxsw_core->fw_flash_in_progress = false; } EXPORT_SYMBOL(mlxsw_core_fw_flash_end); static int __init mlxsw_core_module_init(void) { int err; mlxsw_wq = alloc_workqueue(mlxsw_core_driver_name, WQ_MEM_RECLAIM, 0); if (!mlxsw_wq) return -ENOMEM; mlxsw_owq = alloc_ordered_workqueue("%s_ordered", WQ_MEM_RECLAIM, mlxsw_core_driver_name); if (!mlxsw_owq) { err = -ENOMEM; goto err_alloc_ordered_workqueue; } return 0; err_alloc_ordered_workqueue: destroy_workqueue(mlxsw_wq); return err; } static void __exit mlxsw_core_module_exit(void) { destroy_workqueue(mlxsw_owq); destroy_workqueue(mlxsw_wq); } 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");
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