From 830c41e1e987d9745a01b06c5f86434df8bd5f58 Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Mon, 28 Aug 2023 08:16:49 +0200 Subject: devlink: push param related code into separate file Cut out another chunk from leftover.c and put param related code into a separate file. Signed-off-by: Jiri Pirko Link: https://lore.kernel.org/r/20230828061657.300667-8-jiri@resnulli.us Signed-off-by: Jakub Kicinski --- net/devlink/Makefile | 2 +- net/devlink/devl_internal.h | 9 + net/devlink/leftover.c | 859 ------------------------------------------- net/devlink/param.c | 865 ++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 875 insertions(+), 860 deletions(-) create mode 100644 net/devlink/param.c (limited to 'net/devlink') diff --git a/net/devlink/Makefile b/net/devlink/Makefile index 8864cd933acb..c4b29f603a1f 100644 --- a/net/devlink/Makefile +++ b/net/devlink/Makefile @@ -1,4 +1,4 @@ # SPDX-License-Identifier: GPL-2.0 obj-y := leftover.o core.o netlink.o netlink_gen.o dev.o port.o sb.o dpipe.o \ - resource.o health.o + resource.o param.o health.o diff --git a/net/devlink/devl_internal.h b/net/devlink/devl_internal.h index e5c0acf7a758..e0304d607978 100644 --- a/net/devlink/devl_internal.h +++ b/net/devlink/devl_internal.h @@ -156,6 +156,8 @@ int devlink_nl_msg_reply_and_new(struct sk_buff **msg, struct genl_info *info); void devlink_notify(struct devlink *devlink, enum devlink_command cmd); void devlink_ports_notify_register(struct devlink *devlink); void devlink_ports_notify_unregister(struct devlink *devlink); +void devlink_params_notify_register(struct devlink *devlink); +void devlink_params_notify_unregister(struct devlink *devlink); /* Ports */ #define ASSERT_DEVLINK_PORT_INITIALIZED(devlink_port) \ @@ -240,6 +242,13 @@ int devlink_nl_cmd_dpipe_table_counters_set(struct sk_buff *skb, struct genl_info *info); int devlink_nl_cmd_resource_set(struct sk_buff *skb, struct genl_info *info); int devlink_nl_cmd_resource_dump(struct sk_buff *skb, struct genl_info *info); +int devlink_nl_cmd_param_set_doit(struct sk_buff *skb, struct genl_info *info); +int devlink_nl_cmd_port_param_get_dumpit(struct sk_buff *msg, + struct netlink_callback *cb); +int devlink_nl_cmd_port_param_get_doit(struct sk_buff *skb, + struct genl_info *info); +int devlink_nl_cmd_port_param_set_doit(struct sk_buff *skb, + struct genl_info *info); int devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb, struct genl_info *info); int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb, diff --git a/net/devlink/leftover.c b/net/devlink/leftover.c index 1c65449f2252..2f1dfd27d1c8 100644 --- a/net/devlink/leftover.c +++ b/net/devlink/leftover.c @@ -1061,611 +1061,6 @@ int devlink_rate_nodes_check(struct devlink *devlink, u16 mode, return 0; } -static const struct devlink_param devlink_param_generic[] = { - { - .id = DEVLINK_PARAM_GENERIC_ID_INT_ERR_RESET, - .name = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_NAME, - .type = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_TYPE, - }, - { - .id = DEVLINK_PARAM_GENERIC_ID_MAX_MACS, - .name = DEVLINK_PARAM_GENERIC_MAX_MACS_NAME, - .type = DEVLINK_PARAM_GENERIC_MAX_MACS_TYPE, - }, - { - .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV, - .name = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_NAME, - .type = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_TYPE, - }, - { - .id = DEVLINK_PARAM_GENERIC_ID_REGION_SNAPSHOT, - .name = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_NAME, - .type = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_TYPE, - }, - { - .id = DEVLINK_PARAM_GENERIC_ID_IGNORE_ARI, - .name = DEVLINK_PARAM_GENERIC_IGNORE_ARI_NAME, - .type = DEVLINK_PARAM_GENERIC_IGNORE_ARI_TYPE, - }, - { - .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX, - .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_NAME, - .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_TYPE, - }, - { - .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN, - .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_NAME, - .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_TYPE, - }, - { - .id = DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY, - .name = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_NAME, - .type = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_TYPE, - }, - { - .id = DEVLINK_PARAM_GENERIC_ID_RESET_DEV_ON_DRV_PROBE, - .name = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_NAME, - .type = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_TYPE, - }, - { - .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_ROCE, - .name = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_NAME, - .type = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_TYPE, - }, - { - .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_REMOTE_DEV_RESET, - .name = DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_NAME, - .type = DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_TYPE, - }, - { - .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_ETH, - .name = DEVLINK_PARAM_GENERIC_ENABLE_ETH_NAME, - .type = DEVLINK_PARAM_GENERIC_ENABLE_ETH_TYPE, - }, - { - .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_RDMA, - .name = DEVLINK_PARAM_GENERIC_ENABLE_RDMA_NAME, - .type = DEVLINK_PARAM_GENERIC_ENABLE_RDMA_TYPE, - }, - { - .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_VNET, - .name = DEVLINK_PARAM_GENERIC_ENABLE_VNET_NAME, - .type = DEVLINK_PARAM_GENERIC_ENABLE_VNET_TYPE, - }, - { - .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_IWARP, - .name = DEVLINK_PARAM_GENERIC_ENABLE_IWARP_NAME, - .type = DEVLINK_PARAM_GENERIC_ENABLE_IWARP_TYPE, - }, - { - .id = DEVLINK_PARAM_GENERIC_ID_IO_EQ_SIZE, - .name = DEVLINK_PARAM_GENERIC_IO_EQ_SIZE_NAME, - .type = DEVLINK_PARAM_GENERIC_IO_EQ_SIZE_TYPE, - }, - { - .id = DEVLINK_PARAM_GENERIC_ID_EVENT_EQ_SIZE, - .name = DEVLINK_PARAM_GENERIC_EVENT_EQ_SIZE_NAME, - .type = DEVLINK_PARAM_GENERIC_EVENT_EQ_SIZE_TYPE, - }, -}; - -static int devlink_param_generic_verify(const struct devlink_param *param) -{ - /* verify it match generic parameter by id and name */ - if (param->id > DEVLINK_PARAM_GENERIC_ID_MAX) - return -EINVAL; - if (strcmp(param->name, devlink_param_generic[param->id].name)) - return -ENOENT; - - WARN_ON(param->type != devlink_param_generic[param->id].type); - - return 0; -} - -static int devlink_param_driver_verify(const struct devlink_param *param) -{ - int i; - - if (param->id <= DEVLINK_PARAM_GENERIC_ID_MAX) - return -EINVAL; - /* verify no such name in generic params */ - for (i = 0; i <= DEVLINK_PARAM_GENERIC_ID_MAX; i++) - if (!strcmp(param->name, devlink_param_generic[i].name)) - return -EEXIST; - - return 0; -} - -static struct devlink_param_item * -devlink_param_find_by_name(struct xarray *params, const char *param_name) -{ - struct devlink_param_item *param_item; - unsigned long param_id; - - xa_for_each(params, param_id, param_item) { - if (!strcmp(param_item->param->name, param_name)) - return param_item; - } - return NULL; -} - -static struct devlink_param_item * -devlink_param_find_by_id(struct xarray *params, u32 param_id) -{ - return xa_load(params, param_id); -} - -static bool -devlink_param_cmode_is_supported(const struct devlink_param *param, - enum devlink_param_cmode cmode) -{ - return test_bit(cmode, ¶m->supported_cmodes); -} - -static int devlink_param_get(struct devlink *devlink, - const struct devlink_param *param, - struct devlink_param_gset_ctx *ctx) -{ - if (!param->get) - return -EOPNOTSUPP; - return param->get(devlink, param->id, ctx); -} - -static int devlink_param_set(struct devlink *devlink, - const struct devlink_param *param, - struct devlink_param_gset_ctx *ctx) -{ - if (!param->set) - return -EOPNOTSUPP; - return param->set(devlink, param->id, ctx); -} - -static int -devlink_param_type_to_nla_type(enum devlink_param_type param_type) -{ - switch (param_type) { - case DEVLINK_PARAM_TYPE_U8: - return NLA_U8; - case DEVLINK_PARAM_TYPE_U16: - return NLA_U16; - case DEVLINK_PARAM_TYPE_U32: - return NLA_U32; - case DEVLINK_PARAM_TYPE_STRING: - return NLA_STRING; - case DEVLINK_PARAM_TYPE_BOOL: - return NLA_FLAG; - default: - return -EINVAL; - } -} - -static int -devlink_nl_param_value_fill_one(struct sk_buff *msg, - enum devlink_param_type type, - enum devlink_param_cmode cmode, - union devlink_param_value val) -{ - struct nlattr *param_value_attr; - - param_value_attr = nla_nest_start_noflag(msg, - DEVLINK_ATTR_PARAM_VALUE); - if (!param_value_attr) - goto nla_put_failure; - - if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_CMODE, cmode)) - goto value_nest_cancel; - - switch (type) { - case DEVLINK_PARAM_TYPE_U8: - if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu8)) - goto value_nest_cancel; - break; - case DEVLINK_PARAM_TYPE_U16: - if (nla_put_u16(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu16)) - goto value_nest_cancel; - break; - case DEVLINK_PARAM_TYPE_U32: - if (nla_put_u32(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu32)) - goto value_nest_cancel; - break; - case DEVLINK_PARAM_TYPE_STRING: - if (nla_put_string(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, - val.vstr)) - goto value_nest_cancel; - break; - case DEVLINK_PARAM_TYPE_BOOL: - if (val.vbool && - nla_put_flag(msg, DEVLINK_ATTR_PARAM_VALUE_DATA)) - goto value_nest_cancel; - break; - } - - nla_nest_end(msg, param_value_attr); - return 0; - -value_nest_cancel: - nla_nest_cancel(msg, param_value_attr); -nla_put_failure: - return -EMSGSIZE; -} - -static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink, - unsigned int port_index, - struct devlink_param_item *param_item, - enum devlink_command cmd, - u32 portid, u32 seq, int flags) -{ - union devlink_param_value param_value[DEVLINK_PARAM_CMODE_MAX + 1]; - bool param_value_set[DEVLINK_PARAM_CMODE_MAX + 1] = {}; - const struct devlink_param *param = param_item->param; - struct devlink_param_gset_ctx ctx; - struct nlattr *param_values_list; - struct nlattr *param_attr; - int nla_type; - void *hdr; - int err; - int i; - - /* Get value from driver part to driverinit configuration mode */ - for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) { - if (!devlink_param_cmode_is_supported(param, i)) - continue; - if (i == DEVLINK_PARAM_CMODE_DRIVERINIT) { - if (param_item->driverinit_value_new_valid) - param_value[i] = param_item->driverinit_value_new; - else if (param_item->driverinit_value_valid) - param_value[i] = param_item->driverinit_value; - else - return -EOPNOTSUPP; - } else { - ctx.cmode = i; - err = devlink_param_get(devlink, param, &ctx); - if (err) - return err; - param_value[i] = ctx.val; - } - param_value_set[i] = true; - } - - hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); - if (!hdr) - return -EMSGSIZE; - - if (devlink_nl_put_handle(msg, devlink)) - goto genlmsg_cancel; - - if (cmd == DEVLINK_CMD_PORT_PARAM_GET || - cmd == DEVLINK_CMD_PORT_PARAM_NEW || - cmd == DEVLINK_CMD_PORT_PARAM_DEL) - if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, port_index)) - goto genlmsg_cancel; - - param_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PARAM); - if (!param_attr) - goto genlmsg_cancel; - if (nla_put_string(msg, DEVLINK_ATTR_PARAM_NAME, param->name)) - goto param_nest_cancel; - if (param->generic && nla_put_flag(msg, DEVLINK_ATTR_PARAM_GENERIC)) - goto param_nest_cancel; - - nla_type = devlink_param_type_to_nla_type(param->type); - if (nla_type < 0) - goto param_nest_cancel; - if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_TYPE, nla_type)) - goto param_nest_cancel; - - param_values_list = nla_nest_start_noflag(msg, - DEVLINK_ATTR_PARAM_VALUES_LIST); - if (!param_values_list) - goto param_nest_cancel; - - for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) { - if (!param_value_set[i]) - continue; - err = devlink_nl_param_value_fill_one(msg, param->type, - i, param_value[i]); - if (err) - goto values_list_nest_cancel; - } - - nla_nest_end(msg, param_values_list); - nla_nest_end(msg, param_attr); - genlmsg_end(msg, hdr); - return 0; - -values_list_nest_cancel: - nla_nest_end(msg, param_values_list); -param_nest_cancel: - nla_nest_cancel(msg, param_attr); -genlmsg_cancel: - genlmsg_cancel(msg, hdr); - return -EMSGSIZE; -} - -static void devlink_param_notify(struct devlink *devlink, - unsigned int port_index, - struct devlink_param_item *param_item, - enum devlink_command cmd) -{ - struct sk_buff *msg; - int err; - - WARN_ON(cmd != DEVLINK_CMD_PARAM_NEW && cmd != DEVLINK_CMD_PARAM_DEL && - cmd != DEVLINK_CMD_PORT_PARAM_NEW && - cmd != DEVLINK_CMD_PORT_PARAM_DEL); - - /* devlink_notify_register() / devlink_notify_unregister() - * will replay the notifications if the params are added/removed - * outside of the lifetime of the instance. - */ - if (!devl_is_registered(devlink)) - return; - - msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); - if (!msg) - return; - err = devlink_nl_param_fill(msg, devlink, port_index, param_item, cmd, - 0, 0, 0); - if (err) { - nlmsg_free(msg); - return; - } - - genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), - msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); -} - -static void devlink_params_notify(struct devlink *devlink, - enum devlink_command cmd) -{ - struct devlink_param_item *param_item; - unsigned long param_id; - - xa_for_each(&devlink->params, param_id, param_item) - devlink_param_notify(devlink, 0, param_item, cmd); -} - -static void devlink_params_notify_register(struct devlink *devlink) -{ - devlink_params_notify(devlink, DEVLINK_CMD_PARAM_NEW); -} - -static void devlink_params_notify_unregister(struct devlink *devlink) -{ - devlink_params_notify(devlink, DEVLINK_CMD_PARAM_DEL); -} - -static int devlink_nl_param_get_dump_one(struct sk_buff *msg, - struct devlink *devlink, - struct netlink_callback *cb, - int flags) -{ - struct devlink_nl_dump_state *state = devlink_dump_state(cb); - struct devlink_param_item *param_item; - unsigned long param_id; - int err = 0; - - xa_for_each_start(&devlink->params, param_id, param_item, state->idx) { - err = devlink_nl_param_fill(msg, devlink, 0, param_item, - DEVLINK_CMD_PARAM_GET, - NETLINK_CB(cb->skb).portid, - cb->nlh->nlmsg_seq, flags); - if (err == -EOPNOTSUPP) { - err = 0; - } else if (err) { - state->idx = param_id; - break; - } - } - - return err; -} - -int devlink_nl_param_get_dumpit(struct sk_buff *skb, - struct netlink_callback *cb) -{ - return devlink_nl_dumpit(skb, cb, devlink_nl_param_get_dump_one); -} - -static int -devlink_param_type_get_from_info(struct genl_info *info, - enum devlink_param_type *param_type) -{ - if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PARAM_TYPE)) - return -EINVAL; - - switch (nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_TYPE])) { - case NLA_U8: - *param_type = DEVLINK_PARAM_TYPE_U8; - break; - case NLA_U16: - *param_type = DEVLINK_PARAM_TYPE_U16; - break; - case NLA_U32: - *param_type = DEVLINK_PARAM_TYPE_U32; - break; - case NLA_STRING: - *param_type = DEVLINK_PARAM_TYPE_STRING; - break; - case NLA_FLAG: - *param_type = DEVLINK_PARAM_TYPE_BOOL; - break; - default: - return -EINVAL; - } - - return 0; -} - -static int -devlink_param_value_get_from_info(const struct devlink_param *param, - struct genl_info *info, - union devlink_param_value *value) -{ - struct nlattr *param_data; - int len; - - param_data = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]; - - if (param->type != DEVLINK_PARAM_TYPE_BOOL && !param_data) - return -EINVAL; - - switch (param->type) { - case DEVLINK_PARAM_TYPE_U8: - if (nla_len(param_data) != sizeof(u8)) - return -EINVAL; - value->vu8 = nla_get_u8(param_data); - break; - case DEVLINK_PARAM_TYPE_U16: - if (nla_len(param_data) != sizeof(u16)) - return -EINVAL; - value->vu16 = nla_get_u16(param_data); - break; - case DEVLINK_PARAM_TYPE_U32: - if (nla_len(param_data) != sizeof(u32)) - return -EINVAL; - value->vu32 = nla_get_u32(param_data); - break; - case DEVLINK_PARAM_TYPE_STRING: - len = strnlen(nla_data(param_data), nla_len(param_data)); - if (len == nla_len(param_data) || - len >= __DEVLINK_PARAM_MAX_STRING_VALUE) - return -EINVAL; - strcpy(value->vstr, nla_data(param_data)); - break; - case DEVLINK_PARAM_TYPE_BOOL: - if (param_data && nla_len(param_data)) - return -EINVAL; - value->vbool = nla_get_flag(param_data); - break; - } - return 0; -} - -static struct devlink_param_item * -devlink_param_get_from_info(struct xarray *params, struct genl_info *info) -{ - char *param_name; - - if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PARAM_NAME)) - return NULL; - - param_name = nla_data(info->attrs[DEVLINK_ATTR_PARAM_NAME]); - return devlink_param_find_by_name(params, param_name); -} - -int devlink_nl_param_get_doit(struct sk_buff *skb, - struct genl_info *info) -{ - struct devlink *devlink = info->user_ptr[0]; - struct devlink_param_item *param_item; - struct sk_buff *msg; - int err; - - param_item = devlink_param_get_from_info(&devlink->params, info); - if (!param_item) - return -EINVAL; - - msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); - if (!msg) - return -ENOMEM; - - err = devlink_nl_param_fill(msg, devlink, 0, param_item, - DEVLINK_CMD_PARAM_GET, - info->snd_portid, info->snd_seq, 0); - if (err) { - nlmsg_free(msg); - return err; - } - - return genlmsg_reply(msg, info); -} - -static int __devlink_nl_cmd_param_set_doit(struct devlink *devlink, - unsigned int port_index, - struct xarray *params, - struct genl_info *info, - enum devlink_command cmd) -{ - enum devlink_param_type param_type; - struct devlink_param_gset_ctx ctx; - enum devlink_param_cmode cmode; - struct devlink_param_item *param_item; - const struct devlink_param *param; - union devlink_param_value value; - int err = 0; - - param_item = devlink_param_get_from_info(params, info); - if (!param_item) - return -EINVAL; - param = param_item->param; - err = devlink_param_type_get_from_info(info, ¶m_type); - if (err) - return err; - if (param_type != param->type) - return -EINVAL; - err = devlink_param_value_get_from_info(param, info, &value); - if (err) - return err; - if (param->validate) { - err = param->validate(devlink, param->id, value, info->extack); - if (err) - return err; - } - - if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PARAM_VALUE_CMODE)) - return -EINVAL; - cmode = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE]); - if (!devlink_param_cmode_is_supported(param, cmode)) - return -EOPNOTSUPP; - - if (cmode == DEVLINK_PARAM_CMODE_DRIVERINIT) { - param_item->driverinit_value_new = value; - param_item->driverinit_value_new_valid = true; - } else { - if (!param->set) - return -EOPNOTSUPP; - ctx.val = value; - ctx.cmode = cmode; - err = devlink_param_set(devlink, param, &ctx); - if (err) - return err; - } - - devlink_param_notify(devlink, port_index, param_item, cmd); - return 0; -} - -static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb, - struct genl_info *info) -{ - struct devlink *devlink = info->user_ptr[0]; - - return __devlink_nl_cmd_param_set_doit(devlink, 0, &devlink->params, - info, DEVLINK_CMD_PARAM_NEW); -} - -static int devlink_nl_cmd_port_param_get_dumpit(struct sk_buff *msg, - struct netlink_callback *cb) -{ - NL_SET_ERR_MSG(cb->extack, "Port params are not supported"); - return msg->len; -} - -static int devlink_nl_cmd_port_param_get_doit(struct sk_buff *skb, - struct genl_info *info) -{ - NL_SET_ERR_MSG(info->extack, "Port params are not supported"); - return -EINVAL; -} - -static int devlink_nl_cmd_port_param_set_doit(struct sk_buff *skb, - struct genl_info *info) -{ - NL_SET_ERR_MSG(info->extack, "Port params are not supported"); - return -EINVAL; -} - static int devlink_nl_region_snapshot_id_put(struct sk_buff *msg, struct devlink *devlink, struct devlink_snapshot *snapshot) @@ -4216,260 +3611,6 @@ void devlink_linecard_nested_dl_set(struct devlink_linecard *linecard, } EXPORT_SYMBOL_GPL(devlink_linecard_nested_dl_set); -static int devlink_param_verify(const struct devlink_param *param) -{ - if (!param || !param->name || !param->supported_cmodes) - return -EINVAL; - if (param->generic) - return devlink_param_generic_verify(param); - else - return devlink_param_driver_verify(param); -} - -static int devlink_param_register(struct devlink *devlink, - const struct devlink_param *param) -{ - struct devlink_param_item *param_item; - int err; - - WARN_ON(devlink_param_verify(param)); - WARN_ON(devlink_param_find_by_name(&devlink->params, param->name)); - - if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT)) - WARN_ON(param->get || param->set); - else - WARN_ON(!param->get || !param->set); - - param_item = kzalloc(sizeof(*param_item), GFP_KERNEL); - if (!param_item) - return -ENOMEM; - - param_item->param = param; - - err = xa_insert(&devlink->params, param->id, param_item, GFP_KERNEL); - if (err) - goto err_xa_insert; - - devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW); - return 0; - -err_xa_insert: - kfree(param_item); - return err; -} - -static void devlink_param_unregister(struct devlink *devlink, - const struct devlink_param *param) -{ - struct devlink_param_item *param_item; - - param_item = devlink_param_find_by_id(&devlink->params, param->id); - if (WARN_ON(!param_item)) - return; - devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_DEL); - xa_erase(&devlink->params, param->id); - kfree(param_item); -} - -/** - * devl_params_register - register configuration parameters - * - * @devlink: devlink - * @params: configuration parameters array - * @params_count: number of parameters provided - * - * Register the configuration parameters supported by the driver. - */ -int devl_params_register(struct devlink *devlink, - const struct devlink_param *params, - size_t params_count) -{ - const struct devlink_param *param = params; - int i, err; - - lockdep_assert_held(&devlink->lock); - - for (i = 0; i < params_count; i++, param++) { - err = devlink_param_register(devlink, param); - if (err) - goto rollback; - } - return 0; - -rollback: - if (!i) - return err; - - for (param--; i > 0; i--, param--) - devlink_param_unregister(devlink, param); - return err; -} -EXPORT_SYMBOL_GPL(devl_params_register); - -int devlink_params_register(struct devlink *devlink, - const struct devlink_param *params, - size_t params_count) -{ - int err; - - devl_lock(devlink); - err = devl_params_register(devlink, params, params_count); - devl_unlock(devlink); - return err; -} -EXPORT_SYMBOL_GPL(devlink_params_register); - -/** - * devl_params_unregister - unregister configuration parameters - * @devlink: devlink - * @params: configuration parameters to unregister - * @params_count: number of parameters provided - */ -void devl_params_unregister(struct devlink *devlink, - const struct devlink_param *params, - size_t params_count) -{ - const struct devlink_param *param = params; - int i; - - lockdep_assert_held(&devlink->lock); - - for (i = 0; i < params_count; i++, param++) - devlink_param_unregister(devlink, param); -} -EXPORT_SYMBOL_GPL(devl_params_unregister); - -void devlink_params_unregister(struct devlink *devlink, - const struct devlink_param *params, - size_t params_count) -{ - devl_lock(devlink); - devl_params_unregister(devlink, params, params_count); - devl_unlock(devlink); -} -EXPORT_SYMBOL_GPL(devlink_params_unregister); - -/** - * devl_param_driverinit_value_get - get configuration parameter - * value for driver initializing - * - * @devlink: devlink - * @param_id: parameter ID - * @val: pointer to store the value of parameter in driverinit - * configuration mode - * - * This function should be used by the driver to get driverinit - * configuration for initialization after reload command. - * - * Note that lockless call of this function relies on the - * driver to maintain following basic sane behavior: - * 1) Driver ensures a call to this function cannot race with - * registering/unregistering the parameter with the same parameter ID. - * 2) Driver ensures a call to this function cannot race with - * devl_param_driverinit_value_set() call with the same parameter ID. - * 3) Driver ensures a call to this function cannot race with - * reload operation. - * If the driver is not able to comply, it has to take the devlink->lock - * while calling this. - */ -int devl_param_driverinit_value_get(struct devlink *devlink, u32 param_id, - union devlink_param_value *val) -{ - struct devlink_param_item *param_item; - - if (WARN_ON(!devlink_reload_supported(devlink->ops))) - return -EOPNOTSUPP; - - param_item = devlink_param_find_by_id(&devlink->params, param_id); - if (!param_item) - return -EINVAL; - - if (!param_item->driverinit_value_valid) - return -EOPNOTSUPP; - - if (WARN_ON(!devlink_param_cmode_is_supported(param_item->param, - DEVLINK_PARAM_CMODE_DRIVERINIT))) - return -EOPNOTSUPP; - - *val = param_item->driverinit_value; - - return 0; -} -EXPORT_SYMBOL_GPL(devl_param_driverinit_value_get); - -/** - * devl_param_driverinit_value_set - set value of configuration - * parameter for driverinit - * configuration mode - * - * @devlink: devlink - * @param_id: parameter ID - * @init_val: value of parameter to set for driverinit configuration mode - * - * This function should be used by the driver to set driverinit - * configuration mode default value. - */ -void devl_param_driverinit_value_set(struct devlink *devlink, u32 param_id, - union devlink_param_value init_val) -{ - struct devlink_param_item *param_item; - - devl_assert_locked(devlink); - - param_item = devlink_param_find_by_id(&devlink->params, param_id); - if (WARN_ON(!param_item)) - return; - - if (WARN_ON(!devlink_param_cmode_is_supported(param_item->param, - DEVLINK_PARAM_CMODE_DRIVERINIT))) - return; - - param_item->driverinit_value = init_val; - param_item->driverinit_value_valid = true; - - devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW); -} -EXPORT_SYMBOL_GPL(devl_param_driverinit_value_set); - -void devlink_params_driverinit_load_new(struct devlink *devlink) -{ - struct devlink_param_item *param_item; - unsigned long param_id; - - xa_for_each(&devlink->params, param_id, param_item) { - if (!devlink_param_cmode_is_supported(param_item->param, - DEVLINK_PARAM_CMODE_DRIVERINIT) || - !param_item->driverinit_value_new_valid) - continue; - param_item->driverinit_value = param_item->driverinit_value_new; - param_item->driverinit_value_valid = true; - param_item->driverinit_value_new_valid = false; - } -} - -/** - * devl_param_value_changed - notify devlink on a parameter's value - * change. Should be called by the driver - * right after the change. - * - * @devlink: devlink - * @param_id: parameter ID - * - * This function should be used by the driver to notify devlink on value - * change, excluding driverinit configuration mode. - * For driverinit configuration mode driver should use the function - */ -void devl_param_value_changed(struct devlink *devlink, u32 param_id) -{ - struct devlink_param_item *param_item; - - param_item = devlink_param_find_by_id(&devlink->params, param_id); - WARN_ON(!param_item); - - devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW); -} -EXPORT_SYMBOL_GPL(devl_param_value_changed); - /** * devl_region_create - create a new address region * diff --git a/net/devlink/param.c b/net/devlink/param.c new file mode 100644 index 000000000000..31275f9d4cb7 --- /dev/null +++ b/net/devlink/param.c @@ -0,0 +1,865 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2016 Mellanox Technologies. All rights reserved. + * Copyright (c) 2016 Jiri Pirko + */ + +#include "devl_internal.h" + +static const struct devlink_param devlink_param_generic[] = { + { + .id = DEVLINK_PARAM_GENERIC_ID_INT_ERR_RESET, + .name = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_NAME, + .type = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_MAX_MACS, + .name = DEVLINK_PARAM_GENERIC_MAX_MACS_NAME, + .type = DEVLINK_PARAM_GENERIC_MAX_MACS_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV, + .name = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_NAME, + .type = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_REGION_SNAPSHOT, + .name = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_NAME, + .type = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_IGNORE_ARI, + .name = DEVLINK_PARAM_GENERIC_IGNORE_ARI_NAME, + .type = DEVLINK_PARAM_GENERIC_IGNORE_ARI_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX, + .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_NAME, + .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN, + .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_NAME, + .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY, + .name = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_NAME, + .type = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_RESET_DEV_ON_DRV_PROBE, + .name = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_NAME, + .type = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_ROCE, + .name = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_NAME, + .type = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_REMOTE_DEV_RESET, + .name = DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_NAME, + .type = DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_ETH, + .name = DEVLINK_PARAM_GENERIC_ENABLE_ETH_NAME, + .type = DEVLINK_PARAM_GENERIC_ENABLE_ETH_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_RDMA, + .name = DEVLINK_PARAM_GENERIC_ENABLE_RDMA_NAME, + .type = DEVLINK_PARAM_GENERIC_ENABLE_RDMA_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_VNET, + .name = DEVLINK_PARAM_GENERIC_ENABLE_VNET_NAME, + .type = DEVLINK_PARAM_GENERIC_ENABLE_VNET_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_IWARP, + .name = DEVLINK_PARAM_GENERIC_ENABLE_IWARP_NAME, + .type = DEVLINK_PARAM_GENERIC_ENABLE_IWARP_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_IO_EQ_SIZE, + .name = DEVLINK_PARAM_GENERIC_IO_EQ_SIZE_NAME, + .type = DEVLINK_PARAM_GENERIC_IO_EQ_SIZE_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_EVENT_EQ_SIZE, + .name = DEVLINK_PARAM_GENERIC_EVENT_EQ_SIZE_NAME, + .type = DEVLINK_PARAM_GENERIC_EVENT_EQ_SIZE_TYPE, + }, +}; + +static int devlink_param_generic_verify(const struct devlink_param *param) +{ + /* verify it match generic parameter by id and name */ + if (param->id > DEVLINK_PARAM_GENERIC_ID_MAX) + return -EINVAL; + if (strcmp(param->name, devlink_param_generic[param->id].name)) + return -ENOENT; + + WARN_ON(param->type != devlink_param_generic[param->id].type); + + return 0; +} + +static int devlink_param_driver_verify(const struct devlink_param *param) +{ + int i; + + if (param->id <= DEVLINK_PARAM_GENERIC_ID_MAX) + return -EINVAL; + /* verify no such name in generic params */ + for (i = 0; i <= DEVLINK_PARAM_GENERIC_ID_MAX; i++) + if (!strcmp(param->name, devlink_param_generic[i].name)) + return -EEXIST; + + return 0; +} + +static struct devlink_param_item * +devlink_param_find_by_name(struct xarray *params, const char *param_name) +{ + struct devlink_param_item *param_item; + unsigned long param_id; + + xa_for_each(params, param_id, param_item) { + if (!strcmp(param_item->param->name, param_name)) + return param_item; + } + return NULL; +} + +static struct devlink_param_item * +devlink_param_find_by_id(struct xarray *params, u32 param_id) +{ + return xa_load(params, param_id); +} + +static bool +devlink_param_cmode_is_supported(const struct devlink_param *param, + enum devlink_param_cmode cmode) +{ + return test_bit(cmode, ¶m->supported_cmodes); +} + +static int devlink_param_get(struct devlink *devlink, + const struct devlink_param *param, + struct devlink_param_gset_ctx *ctx) +{ + if (!param->get) + return -EOPNOTSUPP; + return param->get(devlink, param->id, ctx); +} + +static int devlink_param_set(struct devlink *devlink, + const struct devlink_param *param, + struct devlink_param_gset_ctx *ctx) +{ + if (!param->set) + return -EOPNOTSUPP; + return param->set(devlink, param->id, ctx); +} + +static int +devlink_param_type_to_nla_type(enum devlink_param_type param_type) +{ + switch (param_type) { + case DEVLINK_PARAM_TYPE_U8: + return NLA_U8; + case DEVLINK_PARAM_TYPE_U16: + return NLA_U16; + case DEVLINK_PARAM_TYPE_U32: + return NLA_U32; + case DEVLINK_PARAM_TYPE_STRING: + return NLA_STRING; + case DEVLINK_PARAM_TYPE_BOOL: + return NLA_FLAG; + default: + return -EINVAL; + } +} + +static int +devlink_nl_param_value_fill_one(struct sk_buff *msg, + enum devlink_param_type type, + enum devlink_param_cmode cmode, + union devlink_param_value val) +{ + struct nlattr *param_value_attr; + + param_value_attr = nla_nest_start_noflag(msg, + DEVLINK_ATTR_PARAM_VALUE); + if (!param_value_attr) + goto nla_put_failure; + + if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_CMODE, cmode)) + goto value_nest_cancel; + + switch (type) { + case DEVLINK_PARAM_TYPE_U8: + if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu8)) + goto value_nest_cancel; + break; + case DEVLINK_PARAM_TYPE_U16: + if (nla_put_u16(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu16)) + goto value_nest_cancel; + break; + case DEVLINK_PARAM_TYPE_U32: + if (nla_put_u32(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu32)) + goto value_nest_cancel; + break; + case DEVLINK_PARAM_TYPE_STRING: + if (nla_put_string(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, + val.vstr)) + goto value_nest_cancel; + break; + case DEVLINK_PARAM_TYPE_BOOL: + if (val.vbool && + nla_put_flag(msg, DEVLINK_ATTR_PARAM_VALUE_DATA)) + goto value_nest_cancel; + break; + } + + nla_nest_end(msg, param_value_attr); + return 0; + +value_nest_cancel: + nla_nest_cancel(msg, param_value_attr); +nla_put_failure: + return -EMSGSIZE; +} + +static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink, + unsigned int port_index, + struct devlink_param_item *param_item, + enum devlink_command cmd, + u32 portid, u32 seq, int flags) +{ + union devlink_param_value param_value[DEVLINK_PARAM_CMODE_MAX + 1]; + bool param_value_set[DEVLINK_PARAM_CMODE_MAX + 1] = {}; + const struct devlink_param *param = param_item->param; + struct devlink_param_gset_ctx ctx; + struct nlattr *param_values_list; + struct nlattr *param_attr; + int nla_type; + void *hdr; + int err; + int i; + + /* Get value from driver part to driverinit configuration mode */ + for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) { + if (!devlink_param_cmode_is_supported(param, i)) + continue; + if (i == DEVLINK_PARAM_CMODE_DRIVERINIT) { + if (param_item->driverinit_value_new_valid) + param_value[i] = param_item->driverinit_value_new; + else if (param_item->driverinit_value_valid) + param_value[i] = param_item->driverinit_value; + else + return -EOPNOTSUPP; + } else { + ctx.cmode = i; + err = devlink_param_get(devlink, param, &ctx); + if (err) + return err; + param_value[i] = ctx.val; + } + param_value_set[i] = true; + } + + hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); + if (!hdr) + return -EMSGSIZE; + + if (devlink_nl_put_handle(msg, devlink)) + goto genlmsg_cancel; + + if (cmd == DEVLINK_CMD_PORT_PARAM_GET || + cmd == DEVLINK_CMD_PORT_PARAM_NEW || + cmd == DEVLINK_CMD_PORT_PARAM_DEL) + if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, port_index)) + goto genlmsg_cancel; + + param_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PARAM); + if (!param_attr) + goto genlmsg_cancel; + if (nla_put_string(msg, DEVLINK_ATTR_PARAM_NAME, param->name)) + goto param_nest_cancel; + if (param->generic && nla_put_flag(msg, DEVLINK_ATTR_PARAM_GENERIC)) + goto param_nest_cancel; + + nla_type = devlink_param_type_to_nla_type(param->type); + if (nla_type < 0) + goto param_nest_cancel; + if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_TYPE, nla_type)) + goto param_nest_cancel; + + param_values_list = nla_nest_start_noflag(msg, + DEVLINK_ATTR_PARAM_VALUES_LIST); + if (!param_values_list) + goto param_nest_cancel; + + for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) { + if (!param_value_set[i]) + continue; + err = devlink_nl_param_value_fill_one(msg, param->type, + i, param_value[i]); + if (err) + goto values_list_nest_cancel; + } + + nla_nest_end(msg, param_values_list); + nla_nest_end(msg, param_attr); + genlmsg_end(msg, hdr); + return 0; + +values_list_nest_cancel: + nla_nest_end(msg, param_values_list); +param_nest_cancel: + nla_nest_cancel(msg, param_attr); +genlmsg_cancel: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static void devlink_param_notify(struct devlink *devlink, + unsigned int port_index, + struct devlink_param_item *param_item, + enum devlink_command cmd) +{ + struct sk_buff *msg; + int err; + + WARN_ON(cmd != DEVLINK_CMD_PARAM_NEW && cmd != DEVLINK_CMD_PARAM_DEL && + cmd != DEVLINK_CMD_PORT_PARAM_NEW && + cmd != DEVLINK_CMD_PORT_PARAM_DEL); + + /* devlink_notify_register() / devlink_notify_unregister() + * will replay the notifications if the params are added/removed + * outside of the lifetime of the instance. + */ + if (!devl_is_registered(devlink)) + return; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return; + err = devlink_nl_param_fill(msg, devlink, port_index, param_item, cmd, + 0, 0, 0); + if (err) { + nlmsg_free(msg); + return; + } + + genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), + msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); +} + +static void devlink_params_notify(struct devlink *devlink, + enum devlink_command cmd) +{ + struct devlink_param_item *param_item; + unsigned long param_id; + + xa_for_each(&devlink->params, param_id, param_item) + devlink_param_notify(devlink, 0, param_item, cmd); +} + +void devlink_params_notify_register(struct devlink *devlink) +{ + devlink_params_notify(devlink, DEVLINK_CMD_PARAM_NEW); +} + +void devlink_params_notify_unregister(struct devlink *devlink) +{ + devlink_params_notify(devlink, DEVLINK_CMD_PARAM_DEL); +} + +static int devlink_nl_param_get_dump_one(struct sk_buff *msg, + struct devlink *devlink, + struct netlink_callback *cb, + int flags) +{ + struct devlink_nl_dump_state *state = devlink_dump_state(cb); + struct devlink_param_item *param_item; + unsigned long param_id; + int err = 0; + + xa_for_each_start(&devlink->params, param_id, param_item, state->idx) { + err = devlink_nl_param_fill(msg, devlink, 0, param_item, + DEVLINK_CMD_PARAM_GET, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, flags); + if (err == -EOPNOTSUPP) { + err = 0; + } else if (err) { + state->idx = param_id; + break; + } + } + + return err; +} + +int devlink_nl_param_get_dumpit(struct sk_buff *skb, + struct netlink_callback *cb) +{ + return devlink_nl_dumpit(skb, cb, devlink_nl_param_get_dump_one); +} + +static int +devlink_param_type_get_from_info(struct genl_info *info, + enum devlink_param_type *param_type) +{ + if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PARAM_TYPE)) + return -EINVAL; + + switch (nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_TYPE])) { + case NLA_U8: + *param_type = DEVLINK_PARAM_TYPE_U8; + break; + case NLA_U16: + *param_type = DEVLINK_PARAM_TYPE_U16; + break; + case NLA_U32: + *param_type = DEVLINK_PARAM_TYPE_U32; + break; + case NLA_STRING: + *param_type = DEVLINK_PARAM_TYPE_STRING; + break; + case NLA_FLAG: + *param_type = DEVLINK_PARAM_TYPE_BOOL; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int +devlink_param_value_get_from_info(const struct devlink_param *param, + struct genl_info *info, + union devlink_param_value *value) +{ + struct nlattr *param_data; + int len; + + param_data = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]; + + if (param->type != DEVLINK_PARAM_TYPE_BOOL && !param_data) + return -EINVAL; + + switch (param->type) { + case DEVLINK_PARAM_TYPE_U8: + if (nla_len(param_data) != sizeof(u8)) + return -EINVAL; + value->vu8 = nla_get_u8(param_data); + break; + case DEVLINK_PARAM_TYPE_U16: + if (nla_len(param_data) != sizeof(u16)) + return -EINVAL; + value->vu16 = nla_get_u16(param_data); + break; + case DEVLINK_PARAM_TYPE_U32: + if (nla_len(param_data) != sizeof(u32)) + return -EINVAL; + value->vu32 = nla_get_u32(param_data); + break; + case DEVLINK_PARAM_TYPE_STRING: + len = strnlen(nla_data(param_data), nla_len(param_data)); + if (len == nla_len(param_data) || + len >= __DEVLINK_PARAM_MAX_STRING_VALUE) + return -EINVAL; + strcpy(value->vstr, nla_data(param_data)); + break; + case DEVLINK_PARAM_TYPE_BOOL: + if (param_data && nla_len(param_data)) + return -EINVAL; + value->vbool = nla_get_flag(param_data); + break; + } + return 0; +} + +static struct devlink_param_item * +devlink_param_get_from_info(struct xarray *params, struct genl_info *info) +{ + char *param_name; + + if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PARAM_NAME)) + return NULL; + + param_name = nla_data(info->attrs[DEVLINK_ATTR_PARAM_NAME]); + return devlink_param_find_by_name(params, param_name); +} + +int devlink_nl_param_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_param_item *param_item; + struct sk_buff *msg; + int err; + + param_item = devlink_param_get_from_info(&devlink->params, info); + if (!param_item) + return -EINVAL; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_param_fill(msg, devlink, 0, param_item, + DEVLINK_CMD_PARAM_GET, + info->snd_portid, info->snd_seq, 0); + if (err) { + nlmsg_free(msg); + return err; + } + + return genlmsg_reply(msg, info); +} + +static int __devlink_nl_cmd_param_set_doit(struct devlink *devlink, + unsigned int port_index, + struct xarray *params, + struct genl_info *info, + enum devlink_command cmd) +{ + enum devlink_param_type param_type; + struct devlink_param_gset_ctx ctx; + enum devlink_param_cmode cmode; + struct devlink_param_item *param_item; + const struct devlink_param *param; + union devlink_param_value value; + int err = 0; + + param_item = devlink_param_get_from_info(params, info); + if (!param_item) + return -EINVAL; + param = param_item->param; + err = devlink_param_type_get_from_info(info, ¶m_type); + if (err) + return err; + if (param_type != param->type) + return -EINVAL; + err = devlink_param_value_get_from_info(param, info, &value); + if (err) + return err; + if (param->validate) { + err = param->validate(devlink, param->id, value, info->extack); + if (err) + return err; + } + + if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PARAM_VALUE_CMODE)) + return -EINVAL; + cmode = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE]); + if (!devlink_param_cmode_is_supported(param, cmode)) + return -EOPNOTSUPP; + + if (cmode == DEVLINK_PARAM_CMODE_DRIVERINIT) { + param_item->driverinit_value_new = value; + param_item->driverinit_value_new_valid = true; + } else { + if (!param->set) + return -EOPNOTSUPP; + ctx.val = value; + ctx.cmode = cmode; + err = devlink_param_set(devlink, param, &ctx); + if (err) + return err; + } + + devlink_param_notify(devlink, port_index, param_item, cmd); + return 0; +} + +int devlink_nl_cmd_param_set_doit(struct sk_buff *skb, struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + + return __devlink_nl_cmd_param_set_doit(devlink, 0, &devlink->params, + info, DEVLINK_CMD_PARAM_NEW); +} + +int devlink_nl_cmd_port_param_get_dumpit(struct sk_buff *msg, + struct netlink_callback *cb) +{ + NL_SET_ERR_MSG(cb->extack, "Port params are not supported"); + return msg->len; +} + +int devlink_nl_cmd_port_param_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + NL_SET_ERR_MSG(info->extack, "Port params are not supported"); + return -EINVAL; +} + +int devlink_nl_cmd_port_param_set_doit(struct sk_buff *skb, + struct genl_info *info) +{ + NL_SET_ERR_MSG(info->extack, "Port params are not supported"); + return -EINVAL; +} + +static int devlink_param_verify(const struct devlink_param *param) +{ + if (!param || !param->name || !param->supported_cmodes) + return -EINVAL; + if (param->generic) + return devlink_param_generic_verify(param); + else + return devlink_param_driver_verify(param); +} + +static int devlink_param_register(struct devlink *devlink, + const struct devlink_param *param) +{ + struct devlink_param_item *param_item; + int err; + + WARN_ON(devlink_param_verify(param)); + WARN_ON(devlink_param_find_by_name(&devlink->params, param->name)); + + if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT)) + WARN_ON(param->get || param->set); + else + WARN_ON(!param->get || !param->set); + + param_item = kzalloc(sizeof(*param_item), GFP_KERNEL); + if (!param_item) + return -ENOMEM; + + param_item->param = param; + + err = xa_insert(&devlink->params, param->id, param_item, GFP_KERNEL); + if (err) + goto err_xa_insert; + + devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW); + return 0; + +err_xa_insert: + kfree(param_item); + return err; +} + +static void devlink_param_unregister(struct devlink *devlink, + const struct devlink_param *param) +{ + struct devlink_param_item *param_item; + + param_item = devlink_param_find_by_id(&devlink->params, param->id); + if (WARN_ON(!param_item)) + return; + devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_DEL); + xa_erase(&devlink->params, param->id); + kfree(param_item); +} + +/** + * devl_params_register - register configuration parameters + * + * @devlink: devlink + * @params: configuration parameters array + * @params_count: number of parameters provided + * + * Register the configuration parameters supported by the driver. + */ +int devl_params_register(struct devlink *devlink, + const struct devlink_param *params, + size_t params_count) +{ + const struct devlink_param *param = params; + int i, err; + + lockdep_assert_held(&devlink->lock); + + for (i = 0; i < params_count; i++, param++) { + err = devlink_param_register(devlink, param); + if (err) + goto rollback; + } + return 0; + +rollback: + if (!i) + return err; + + for (param--; i > 0; i--, param--) + devlink_param_unregister(devlink, param); + return err; +} +EXPORT_SYMBOL_GPL(devl_params_register); + +int devlink_params_register(struct devlink *devlink, + const struct devlink_param *params, + size_t params_count) +{ + int err; + + devl_lock(devlink); + err = devl_params_register(devlink, params, params_count); + devl_unlock(devlink); + return err; +} +EXPORT_SYMBOL_GPL(devlink_params_register); + +/** + * devl_params_unregister - unregister configuration parameters + * @devlink: devlink + * @params: configuration parameters to unregister + * @params_count: number of parameters provided + */ +void devl_params_unregister(struct devlink *devlink, + const struct devlink_param *params, + size_t params_count) +{ + const struct devlink_param *param = params; + int i; + + lockdep_assert_held(&devlink->lock); + + for (i = 0; i < params_count; i++, param++) + devlink_param_unregister(devlink, param); +} +EXPORT_SYMBOL_GPL(devl_params_unregister); + +void devlink_params_unregister(struct devlink *devlink, + const struct devlink_param *params, + size_t params_count) +{ + devl_lock(devlink); + devl_params_unregister(devlink, params, params_count); + devl_unlock(devlink); +} +EXPORT_SYMBOL_GPL(devlink_params_unregister); + +/** + * devl_param_driverinit_value_get - get configuration parameter + * value for driver initializing + * + * @devlink: devlink + * @param_id: parameter ID + * @val: pointer to store the value of parameter in driverinit + * configuration mode + * + * This function should be used by the driver to get driverinit + * configuration for initialization after reload command. + * + * Note that lockless call of this function relies on the + * driver to maintain following basic sane behavior: + * 1) Driver ensures a call to this function cannot race with + * registering/unregistering the parameter with the same parameter ID. + * 2) Driver ensures a call to this function cannot race with + * devl_param_driverinit_value_set() call with the same parameter ID. + * 3) Driver ensures a call to this function cannot race with + * reload operation. + * If the driver is not able to comply, it has to take the devlink->lock + * while calling this. + */ +int devl_param_driverinit_value_get(struct devlink *devlink, u32 param_id, + union devlink_param_value *val) +{ + struct devlink_param_item *param_item; + + if (WARN_ON(!devlink_reload_supported(devlink->ops))) + return -EOPNOTSUPP; + + param_item = devlink_param_find_by_id(&devlink->params, param_id); + if (!param_item) + return -EINVAL; + + if (!param_item->driverinit_value_valid) + return -EOPNOTSUPP; + + if (WARN_ON(!devlink_param_cmode_is_supported(param_item->param, + DEVLINK_PARAM_CMODE_DRIVERINIT))) + return -EOPNOTSUPP; + + *val = param_item->driverinit_value; + + return 0; +} +EXPORT_SYMBOL_GPL(devl_param_driverinit_value_get); + +/** + * devl_param_driverinit_value_set - set value of configuration + * parameter for driverinit + * configuration mode + * + * @devlink: devlink + * @param_id: parameter ID + * @init_val: value of parameter to set for driverinit configuration mode + * + * This function should be used by the driver to set driverinit + * configuration mode default value. + */ +void devl_param_driverinit_value_set(struct devlink *devlink, u32 param_id, + union devlink_param_value init_val) +{ + struct devlink_param_item *param_item; + + devl_assert_locked(devlink); + + param_item = devlink_param_find_by_id(&devlink->params, param_id); + if (WARN_ON(!param_item)) + return; + + if (WARN_ON(!devlink_param_cmode_is_supported(param_item->param, + DEVLINK_PARAM_CMODE_DRIVERINIT))) + return; + + param_item->driverinit_value = init_val; + param_item->driverinit_value_valid = true; + + devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW); +} +EXPORT_SYMBOL_GPL(devl_param_driverinit_value_set); + +void devlink_params_driverinit_load_new(struct devlink *devlink) +{ + struct devlink_param_item *param_item; + unsigned long param_id; + + xa_for_each(&devlink->params, param_id, param_item) { + if (!devlink_param_cmode_is_supported(param_item->param, + DEVLINK_PARAM_CMODE_DRIVERINIT) || + !param_item->driverinit_value_new_valid) + continue; + param_item->driverinit_value = param_item->driverinit_value_new; + param_item->driverinit_value_valid = true; + param_item->driverinit_value_new_valid = false; + } +} + +/** + * devl_param_value_changed - notify devlink on a parameter's value + * change. Should be called by the driver + * right after the change. + * + * @devlink: devlink + * @param_id: parameter ID + * + * This function should be used by the driver to notify devlink on value + * change, excluding driverinit configuration mode. + * For driverinit configuration mode driver should use the function + */ +void devl_param_value_changed(struct devlink *devlink, u32 param_id) +{ + struct devlink_param_item *param_item; + + param_item = devlink_param_find_by_id(&devlink->params, param_id); + WARN_ON(!param_item); + + devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW); +} +EXPORT_SYMBOL_GPL(devl_param_value_changed); -- cgit v1.2.3