| /* |
| * Copyright (c) 2018 Cumulus Networks. All rights reserved. |
| * Copyright (c) 2018 David Ahern <dsa@cumulusnetworks.com> |
| * Copyright (c) 2019 Mellanox Technologies. All rights reserved. |
| * |
| * This software is licensed under the GNU General License Version 2, |
| * June 1991 as shown in the file COPYING in the top-level directory of this |
| * source tree. |
| * |
| * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" |
| * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, |
| * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE |
| * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME |
| * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. |
| */ |
| |
| #include <linux/debugfs.h> |
| #include <linux/device.h> |
| #include <linux/etherdevice.h> |
| #include <linux/inet.h> |
| #include <linux/jiffies.h> |
| #include <linux/kernel.h> |
| #include <linux/list.h> |
| #include <linux/mutex.h> |
| #include <linux/random.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/workqueue.h> |
| #include <net/devlink.h> |
| #include <net/ip.h> |
| #include <uapi/linux/devlink.h> |
| #include <uapi/linux/ip.h> |
| #include <uapi/linux/udp.h> |
| |
| #include "netdevsim.h" |
| |
| static struct dentry *nsim_dev_ddir; |
| |
| #define NSIM_DEV_DUMMY_REGION_SIZE (1024 * 32) |
| |
| static ssize_t nsim_dev_take_snapshot_write(struct file *file, |
| const char __user *data, |
| size_t count, loff_t *ppos) |
| { |
| struct nsim_dev *nsim_dev = file->private_data; |
| void *dummy_data; |
| int err; |
| u32 id; |
| |
| dummy_data = kmalloc(NSIM_DEV_DUMMY_REGION_SIZE, GFP_KERNEL); |
| if (!dummy_data) |
| return -ENOMEM; |
| |
| get_random_bytes(dummy_data, NSIM_DEV_DUMMY_REGION_SIZE); |
| |
| id = devlink_region_shapshot_id_get(priv_to_devlink(nsim_dev)); |
| err = devlink_region_snapshot_create(nsim_dev->dummy_region, |
| dummy_data, id, kfree); |
| if (err) { |
| pr_err("Failed to create region snapshot\n"); |
| kfree(dummy_data); |
| return err; |
| } |
| |
| return count; |
| } |
| |
| static const struct file_operations nsim_dev_take_snapshot_fops = { |
| .open = simple_open, |
| .write = nsim_dev_take_snapshot_write, |
| .llseek = generic_file_llseek, |
| }; |
| |
| static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev) |
| { |
| char dev_ddir_name[sizeof(DRV_NAME) + 10]; |
| |
| sprintf(dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id); |
| nsim_dev->ddir = debugfs_create_dir(dev_ddir_name, nsim_dev_ddir); |
| if (IS_ERR_OR_NULL(nsim_dev->ddir)) |
| return PTR_ERR_OR_ZERO(nsim_dev->ddir) ?: -EINVAL; |
| nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir); |
| if (IS_ERR_OR_NULL(nsim_dev->ports_ddir)) |
| return PTR_ERR_OR_ZERO(nsim_dev->ports_ddir) ?: -EINVAL; |
| debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir, |
| &nsim_dev->fw_update_status); |
| debugfs_create_u32("max_macs", 0600, nsim_dev->ddir, |
| &nsim_dev->max_macs); |
| debugfs_create_bool("test1", 0600, nsim_dev->ddir, |
| &nsim_dev->test1); |
| debugfs_create_file("take_snapshot", 0200, nsim_dev->ddir, nsim_dev, |
| &nsim_dev_take_snapshot_fops); |
| return 0; |
| } |
| |
| static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev) |
| { |
| debugfs_remove_recursive(nsim_dev->ports_ddir); |
| debugfs_remove_recursive(nsim_dev->ddir); |
| } |
| |
| static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev, |
| struct nsim_dev_port *nsim_dev_port) |
| { |
| char port_ddir_name[16]; |
| char dev_link_name[32]; |
| |
| sprintf(port_ddir_name, "%u", nsim_dev_port->port_index); |
| nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name, |
| nsim_dev->ports_ddir); |
| if (IS_ERR_OR_NULL(nsim_dev_port->ddir)) |
| return -ENOMEM; |
| |
| sprintf(dev_link_name, "../../../" DRV_NAME "%u", |
| nsim_dev->nsim_bus_dev->dev.id); |
| debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name); |
| |
| return 0; |
| } |
| |
| static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port) |
| { |
| debugfs_remove_recursive(nsim_dev_port->ddir); |
| } |
| |
| static struct net *nsim_devlink_net(struct devlink *devlink) |
| { |
| return &init_net; |
| } |
| |
| static u64 nsim_dev_ipv4_fib_resource_occ_get(void *priv) |
| { |
| struct net *net = priv; |
| |
| return nsim_fib_get_val(net, NSIM_RESOURCE_IPV4_FIB, false); |
| } |
| |
| static u64 nsim_dev_ipv4_fib_rules_res_occ_get(void *priv) |
| { |
| struct net *net = priv; |
| |
| return nsim_fib_get_val(net, NSIM_RESOURCE_IPV4_FIB_RULES, false); |
| } |
| |
| static u64 nsim_dev_ipv6_fib_resource_occ_get(void *priv) |
| { |
| struct net *net = priv; |
| |
| return nsim_fib_get_val(net, NSIM_RESOURCE_IPV6_FIB, false); |
| } |
| |
| static u64 nsim_dev_ipv6_fib_rules_res_occ_get(void *priv) |
| { |
| struct net *net = priv; |
| |
| return nsim_fib_get_val(net, NSIM_RESOURCE_IPV6_FIB_RULES, false); |
| } |
| |
| static int nsim_dev_resources_register(struct devlink *devlink) |
| { |
| struct devlink_resource_size_params params = { |
| .size_max = (u64)-1, |
| .size_granularity = 1, |
| .unit = DEVLINK_RESOURCE_UNIT_ENTRY |
| }; |
| struct net *net = nsim_devlink_net(devlink); |
| int err; |
| u64 n; |
| |
| /* Resources for IPv4 */ |
| err = devlink_resource_register(devlink, "IPv4", (u64)-1, |
| NSIM_RESOURCE_IPV4, |
| DEVLINK_RESOURCE_ID_PARENT_TOP, |
| ¶ms); |
| if (err) { |
| pr_err("Failed to register IPv4 top resource\n"); |
| goto out; |
| } |
| |
| n = nsim_fib_get_val(net, NSIM_RESOURCE_IPV4_FIB, true); |
| err = devlink_resource_register(devlink, "fib", n, |
| NSIM_RESOURCE_IPV4_FIB, |
| NSIM_RESOURCE_IPV4, ¶ms); |
| if (err) { |
| pr_err("Failed to register IPv4 FIB resource\n"); |
| return err; |
| } |
| |
| n = nsim_fib_get_val(net, NSIM_RESOURCE_IPV4_FIB_RULES, true); |
| err = devlink_resource_register(devlink, "fib-rules", n, |
| NSIM_RESOURCE_IPV4_FIB_RULES, |
| NSIM_RESOURCE_IPV4, ¶ms); |
| if (err) { |
| pr_err("Failed to register IPv4 FIB rules resource\n"); |
| return err; |
| } |
| |
| /* Resources for IPv6 */ |
| err = devlink_resource_register(devlink, "IPv6", (u64)-1, |
| NSIM_RESOURCE_IPV6, |
| DEVLINK_RESOURCE_ID_PARENT_TOP, |
| ¶ms); |
| if (err) { |
| pr_err("Failed to register IPv6 top resource\n"); |
| goto out; |
| } |
| |
| n = nsim_fib_get_val(net, NSIM_RESOURCE_IPV6_FIB, true); |
| err = devlink_resource_register(devlink, "fib", n, |
| NSIM_RESOURCE_IPV6_FIB, |
| NSIM_RESOURCE_IPV6, ¶ms); |
| if (err) { |
| pr_err("Failed to register IPv6 FIB resource\n"); |
| return err; |
| } |
| |
| n = nsim_fib_get_val(net, NSIM_RESOURCE_IPV6_FIB_RULES, true); |
| err = devlink_resource_register(devlink, "fib-rules", n, |
| NSIM_RESOURCE_IPV6_FIB_RULES, |
| NSIM_RESOURCE_IPV6, ¶ms); |
| if (err) { |
| pr_err("Failed to register IPv6 FIB rules resource\n"); |
| return err; |
| } |
| |
| devlink_resource_occ_get_register(devlink, |
| NSIM_RESOURCE_IPV4_FIB, |
| nsim_dev_ipv4_fib_resource_occ_get, |
| net); |
| devlink_resource_occ_get_register(devlink, |
| NSIM_RESOURCE_IPV4_FIB_RULES, |
| nsim_dev_ipv4_fib_rules_res_occ_get, |
| net); |
| devlink_resource_occ_get_register(devlink, |
| NSIM_RESOURCE_IPV6_FIB, |
| nsim_dev_ipv6_fib_resource_occ_get, |
| net); |
| devlink_resource_occ_get_register(devlink, |
| NSIM_RESOURCE_IPV6_FIB_RULES, |
| nsim_dev_ipv6_fib_rules_res_occ_get, |
| net); |
| out: |
| return err; |
| } |
| |
| enum nsim_devlink_param_id { |
| NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX, |
| NSIM_DEVLINK_PARAM_ID_TEST1, |
| }; |
| |
| static const struct devlink_param nsim_devlink_params[] = { |
| DEVLINK_PARAM_GENERIC(MAX_MACS, |
| BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), |
| NULL, NULL, NULL), |
| DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1, |
| "test1", DEVLINK_PARAM_TYPE_BOOL, |
| BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), |
| NULL, NULL, NULL), |
| }; |
| |
| static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev, |
| struct devlink *devlink) |
| { |
| union devlink_param_value value; |
| |
| value.vu32 = nsim_dev->max_macs; |
| devlink_param_driverinit_value_set(devlink, |
| DEVLINK_PARAM_GENERIC_ID_MAX_MACS, |
| value); |
| value.vbool = nsim_dev->test1; |
| devlink_param_driverinit_value_set(devlink, |
| NSIM_DEVLINK_PARAM_ID_TEST1, |
| value); |
| } |
| |
| static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink) |
| { |
| struct nsim_dev *nsim_dev = devlink_priv(devlink); |
| union devlink_param_value saved_value; |
| int err; |
| |
| err = devlink_param_driverinit_value_get(devlink, |
| DEVLINK_PARAM_GENERIC_ID_MAX_MACS, |
| &saved_value); |
| if (!err) |
| nsim_dev->max_macs = saved_value.vu32; |
| err = devlink_param_driverinit_value_get(devlink, |
| NSIM_DEVLINK_PARAM_ID_TEST1, |
| &saved_value); |
| if (!err) |
| nsim_dev->test1 = saved_value.vbool; |
| } |
| |
| #define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16 |
| |
| static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev, |
| struct devlink *devlink) |
| { |
| nsim_dev->dummy_region = |
| devlink_region_create(devlink, "dummy", |
| NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX, |
| NSIM_DEV_DUMMY_REGION_SIZE); |
| return PTR_ERR_OR_ZERO(nsim_dev->dummy_region); |
| } |
| |
| static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev) |
| { |
| devlink_region_destroy(nsim_dev->dummy_region); |
| } |
| |
| struct nsim_trap_item { |
| void *trap_ctx; |
| enum devlink_trap_action action; |
| }; |
| |
| struct nsim_trap_data { |
| struct delayed_work trap_report_dw; |
| struct nsim_trap_item *trap_items_arr; |
| struct nsim_dev *nsim_dev; |
| spinlock_t trap_lock; /* Protects trap_items_arr */ |
| }; |
| |
| /* All driver-specific traps must be documented in |
| * Documentation/networking/devlink-trap-netdevsim.rst |
| */ |
| enum { |
| NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX, |
| NSIM_TRAP_ID_FID_MISS, |
| }; |
| |
| #define NSIM_TRAP_NAME_FID_MISS "fid_miss" |
| |
| #define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT |
| |
| #define NSIM_TRAP_DROP(_id, _group_id) \ |
| DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ |
| DEVLINK_TRAP_GROUP_GENERIC(_group_id), \ |
| NSIM_TRAP_METADATA) |
| #define NSIM_TRAP_EXCEPTION(_id, _group_id) \ |
| DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \ |
| DEVLINK_TRAP_GROUP_GENERIC(_group_id), \ |
| NSIM_TRAP_METADATA) |
| #define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \ |
| DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \ |
| NSIM_TRAP_NAME_##_id, \ |
| DEVLINK_TRAP_GROUP_GENERIC(_group_id), \ |
| NSIM_TRAP_METADATA) |
| |
| static const struct devlink_trap nsim_traps_arr[] = { |
| NSIM_TRAP_DROP(SMAC_MC, L2_DROPS), |
| NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS), |
| NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS), |
| NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS), |
| NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS), |
| NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS), |
| NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS), |
| NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS), |
| NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_DROPS), |
| NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS), |
| }; |
| |
| #define NSIM_TRAP_L4_DATA_LEN 100 |
| |
| static struct sk_buff *nsim_dev_trap_skb_build(void) |
| { |
| int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN; |
| struct sk_buff *skb; |
| struct udphdr *udph; |
| struct ethhdr *eth; |
| struct iphdr *iph; |
| |
| skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); |
| if (!skb) |
| return NULL; |
| tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len; |
| |
| skb_reset_mac_header(skb); |
| eth = skb_put(skb, sizeof(struct ethhdr)); |
| eth_random_addr(eth->h_dest); |
| eth_random_addr(eth->h_source); |
| eth->h_proto = htons(ETH_P_IP); |
| skb->protocol = htons(ETH_P_IP); |
| |
| skb_set_network_header(skb, skb->len); |
| iph = skb_put(skb, sizeof(struct iphdr)); |
| iph->protocol = IPPROTO_UDP; |
| iph->saddr = in_aton("192.0.2.1"); |
| iph->daddr = in_aton("198.51.100.1"); |
| iph->version = 0x4; |
| iph->frag_off = 0; |
| iph->ihl = 0x5; |
| iph->tot_len = htons(tot_len); |
| iph->ttl = 100; |
| iph->check = 0; |
| iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); |
| |
| skb_set_transport_header(skb, skb->len); |
| udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len); |
| get_random_bytes(&udph->source, sizeof(u16)); |
| get_random_bytes(&udph->dest, sizeof(u16)); |
| udph->len = htons(sizeof(struct udphdr) + data_len); |
| |
| return skb; |
| } |
| |
| static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port) |
| { |
| struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; |
| struct devlink *devlink = priv_to_devlink(nsim_dev); |
| struct nsim_trap_data *nsim_trap_data; |
| int i; |
| |
| nsim_trap_data = nsim_dev->trap_data; |
| |
| spin_lock(&nsim_trap_data->trap_lock); |
| for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { |
| struct nsim_trap_item *nsim_trap_item; |
| struct sk_buff *skb; |
| |
| nsim_trap_item = &nsim_trap_data->trap_items_arr[i]; |
| if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP) |
| continue; |
| |
| skb = nsim_dev_trap_skb_build(); |
| if (!skb) |
| continue; |
| skb->dev = nsim_dev_port->ns->netdev; |
| |
| /* Trapped packets are usually passed to devlink in softIRQ, |
| * but in this case they are generated in a workqueue. Disable |
| * softIRQs to prevent lockdep from complaining about |
| * "incosistent lock state". |
| */ |
| local_bh_disable(); |
| devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx, |
| &nsim_dev_port->devlink_port); |
| local_bh_enable(); |
| consume_skb(skb); |
| } |
| spin_unlock(&nsim_trap_data->trap_lock); |
| } |
| |
| #define NSIM_TRAP_REPORT_INTERVAL_MS 100 |
| |
| static void nsim_dev_trap_report_work(struct work_struct *work) |
| { |
| struct nsim_trap_data *nsim_trap_data; |
| struct nsim_dev_port *nsim_dev_port; |
| struct nsim_dev *nsim_dev; |
| |
| nsim_trap_data = container_of(work, struct nsim_trap_data, |
| trap_report_dw.work); |
| nsim_dev = nsim_trap_data->nsim_dev; |
| |
| /* For each running port and enabled packet trap, generate a UDP |
| * packet with a random 5-tuple and report it. |
| */ |
| mutex_lock(&nsim_dev->port_list_lock); |
| list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) { |
| if (!netif_running(nsim_dev_port->ns->netdev)) |
| continue; |
| |
| nsim_dev_trap_report(nsim_dev_port); |
| } |
| mutex_unlock(&nsim_dev->port_list_lock); |
| |
| schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw, |
| msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); |
| } |
| |
| static int nsim_dev_traps_init(struct devlink *devlink) |
| { |
| struct nsim_dev *nsim_dev = devlink_priv(devlink); |
| struct nsim_trap_data *nsim_trap_data; |
| int err; |
| |
| nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL); |
| if (!nsim_trap_data) |
| return -ENOMEM; |
| |
| nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr), |
| sizeof(struct nsim_trap_item), |
| GFP_KERNEL); |
| if (!nsim_trap_data->trap_items_arr) { |
| err = -ENOMEM; |
| goto err_trap_data_free; |
| } |
| |
| /* The lock is used to protect the action state of the registered |
| * traps. The value is written by user and read in delayed work when |
| * iterating over all the traps. |
| */ |
| spin_lock_init(&nsim_trap_data->trap_lock); |
| nsim_trap_data->nsim_dev = nsim_dev; |
| nsim_dev->trap_data = nsim_trap_data; |
| |
| err = devlink_traps_register(devlink, nsim_traps_arr, |
| ARRAY_SIZE(nsim_traps_arr), NULL); |
| if (err) |
| goto err_trap_items_free; |
| |
| INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw, |
| nsim_dev_trap_report_work); |
| schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw, |
| msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); |
| |
| return 0; |
| |
| err_trap_items_free: |
| kfree(nsim_trap_data->trap_items_arr); |
| err_trap_data_free: |
| kfree(nsim_trap_data); |
| return err; |
| } |
| |
| static void nsim_dev_traps_exit(struct devlink *devlink) |
| { |
| struct nsim_dev *nsim_dev = devlink_priv(devlink); |
| |
| cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw); |
| devlink_traps_unregister(devlink, nsim_traps_arr, |
| ARRAY_SIZE(nsim_traps_arr)); |
| kfree(nsim_dev->trap_data->trap_items_arr); |
| kfree(nsim_dev->trap_data); |
| } |
| |
| static int nsim_dev_reload_down(struct devlink *devlink, |
| struct netlink_ext_ack *extack) |
| { |
| return 0; |
| } |
| |
| static int nsim_dev_reload_up(struct devlink *devlink, |
| struct netlink_ext_ack *extack) |
| { |
| enum nsim_resource_id res_ids[] = { |
| NSIM_RESOURCE_IPV4_FIB, NSIM_RESOURCE_IPV4_FIB_RULES, |
| NSIM_RESOURCE_IPV6_FIB, NSIM_RESOURCE_IPV6_FIB_RULES |
| }; |
| struct net *net = nsim_devlink_net(devlink); |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(res_ids); ++i) { |
| int err; |
| u64 val; |
| |
| err = devlink_resource_size_get(devlink, res_ids[i], &val); |
| if (!err) { |
| err = nsim_fib_set_max(net, res_ids[i], val, extack); |
| if (err) |
| return err; |
| } |
| } |
| nsim_devlink_param_load_driverinit_values(devlink); |
| |
| return 0; |
| } |
| |
| #define NSIM_DEV_FLASH_SIZE 500000 |
| #define NSIM_DEV_FLASH_CHUNK_SIZE 1000 |
| #define NSIM_DEV_FLASH_CHUNK_TIME_MS 10 |
| |
| static int nsim_dev_flash_update(struct devlink *devlink, const char *file_name, |
| const char *component, |
| struct netlink_ext_ack *extack) |
| { |
| struct nsim_dev *nsim_dev = devlink_priv(devlink); |
| int i; |
| |
| if (nsim_dev->fw_update_status) { |
| devlink_flash_update_begin_notify(devlink); |
| devlink_flash_update_status_notify(devlink, |
| "Preparing to flash", |
| component, 0, 0); |
| } |
| |
| for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) { |
| if (nsim_dev->fw_update_status) |
| devlink_flash_update_status_notify(devlink, "Flashing", |
| component, |
| i * NSIM_DEV_FLASH_CHUNK_SIZE, |
| NSIM_DEV_FLASH_SIZE); |
| msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS); |
| } |
| |
| if (nsim_dev->fw_update_status) { |
| devlink_flash_update_status_notify(devlink, "Flashing", |
| component, |
| NSIM_DEV_FLASH_SIZE, |
| NSIM_DEV_FLASH_SIZE); |
| devlink_flash_update_status_notify(devlink, "Flashing done", |
| component, 0, 0); |
| devlink_flash_update_end_notify(devlink); |
| } |
| |
| return 0; |
| } |
| |
| static struct nsim_trap_item * |
| nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id) |
| { |
| struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data; |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { |
| if (nsim_traps_arr[i].id == trap_id) |
| return &nsim_trap_data->trap_items_arr[i]; |
| } |
| |
| return NULL; |
| } |
| |
| static int nsim_dev_devlink_trap_init(struct devlink *devlink, |
| const struct devlink_trap *trap, |
| void *trap_ctx) |
| { |
| struct nsim_dev *nsim_dev = devlink_priv(devlink); |
| struct nsim_trap_item *nsim_trap_item; |
| |
| nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id); |
| if (WARN_ON(!nsim_trap_item)) |
| return -ENOENT; |
| |
| nsim_trap_item->trap_ctx = trap_ctx; |
| nsim_trap_item->action = trap->init_action; |
| |
| return 0; |
| } |
| |
| static int |
| nsim_dev_devlink_trap_action_set(struct devlink *devlink, |
| const struct devlink_trap *trap, |
| enum devlink_trap_action action) |
| { |
| struct nsim_dev *nsim_dev = devlink_priv(devlink); |
| struct nsim_trap_item *nsim_trap_item; |
| |
| nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id); |
| if (WARN_ON(!nsim_trap_item)) |
| return -ENOENT; |
| |
| spin_lock(&nsim_dev->trap_data->trap_lock); |
| nsim_trap_item->action = action; |
| spin_unlock(&nsim_dev->trap_data->trap_lock); |
| |
| return 0; |
| } |
| |
| static const struct devlink_ops nsim_dev_devlink_ops = { |
| .reload_down = nsim_dev_reload_down, |
| .reload_up = nsim_dev_reload_up, |
| .flash_update = nsim_dev_flash_update, |
| .trap_init = nsim_dev_devlink_trap_init, |
| .trap_action_set = nsim_dev_devlink_trap_action_set, |
| }; |
| |
| #define NSIM_DEV_MAX_MACS_DEFAULT 32 |
| #define NSIM_DEV_TEST1_DEFAULT true |
| |
| static struct nsim_dev * |
| nsim_dev_create(struct nsim_bus_dev *nsim_bus_dev, unsigned int port_count) |
| { |
| struct nsim_dev *nsim_dev; |
| struct devlink *devlink; |
| int err; |
| |
| devlink = devlink_alloc(&nsim_dev_devlink_ops, sizeof(*nsim_dev)); |
| if (!devlink) |
| return ERR_PTR(-ENOMEM); |
| nsim_dev = devlink_priv(devlink); |
| nsim_dev->nsim_bus_dev = nsim_bus_dev; |
| nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id); |
| get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len); |
| INIT_LIST_HEAD(&nsim_dev->port_list); |
| mutex_init(&nsim_dev->port_list_lock); |
| nsim_dev->fw_update_status = true; |
| nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT; |
| nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT; |
| |
| err = nsim_dev_resources_register(devlink); |
| if (err) |
| goto err_devlink_free; |
| |
| err = devlink_register(devlink, &nsim_bus_dev->dev); |
| if (err) |
| goto err_resources_unregister; |
| |
| err = devlink_params_register(devlink, nsim_devlink_params, |
| ARRAY_SIZE(nsim_devlink_params)); |
| if (err) |
| goto err_dl_unregister; |
| nsim_devlink_set_params_init_values(nsim_dev, devlink); |
| |
| err = nsim_dev_dummy_region_init(nsim_dev, devlink); |
| if (err) |
| goto err_params_unregister; |
| |
| err = nsim_dev_traps_init(devlink); |
| if (err) |
| goto err_dummy_region_exit; |
| |
| err = nsim_dev_debugfs_init(nsim_dev); |
| if (err) |
| goto err_traps_exit; |
| |
| err = nsim_bpf_dev_init(nsim_dev); |
| if (err) |
| goto err_debugfs_exit; |
| |
| devlink_params_publish(devlink); |
| devlink_reload_enable(devlink); |
| return nsim_dev; |
| |
| err_debugfs_exit: |
| nsim_dev_debugfs_exit(nsim_dev); |
| err_traps_exit: |
| nsim_dev_traps_exit(devlink); |
| err_dummy_region_exit: |
| nsim_dev_dummy_region_exit(nsim_dev); |
| err_params_unregister: |
| devlink_params_unregister(devlink, nsim_devlink_params, |
| ARRAY_SIZE(nsim_devlink_params)); |
| err_dl_unregister: |
| devlink_unregister(devlink); |
| err_resources_unregister: |
| devlink_resources_unregister(devlink, NULL); |
| err_devlink_free: |
| devlink_free(devlink); |
| return ERR_PTR(err); |
| } |
| |
| static void nsim_dev_destroy(struct nsim_dev *nsim_dev) |
| { |
| struct devlink *devlink = priv_to_devlink(nsim_dev); |
| |
| devlink_reload_disable(devlink); |
| nsim_bpf_dev_exit(nsim_dev); |
| nsim_dev_debugfs_exit(nsim_dev); |
| nsim_dev_traps_exit(devlink); |
| nsim_dev_dummy_region_exit(nsim_dev); |
| devlink_params_unregister(devlink, nsim_devlink_params, |
| ARRAY_SIZE(nsim_devlink_params)); |
| devlink_unregister(devlink); |
| devlink_resources_unregister(devlink, NULL); |
| mutex_destroy(&nsim_dev->port_list_lock); |
| devlink_free(devlink); |
| } |
| |
| static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, |
| unsigned int port_index) |
| { |
| struct nsim_dev_port *nsim_dev_port; |
| struct devlink_port *devlink_port; |
| int err; |
| |
| nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL); |
| if (!nsim_dev_port) |
| return -ENOMEM; |
| nsim_dev_port->port_index = port_index; |
| |
| devlink_port = &nsim_dev_port->devlink_port; |
| devlink_port_attrs_set(devlink_port, DEVLINK_PORT_FLAVOUR_PHYSICAL, |
| port_index + 1, 0, 0, |
| nsim_dev->switch_id.id, |
| nsim_dev->switch_id.id_len); |
| err = devlink_port_register(priv_to_devlink(nsim_dev), devlink_port, |
| port_index); |
| if (err) |
| goto err_port_free; |
| |
| err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port); |
| if (err) |
| goto err_dl_port_unregister; |
| |
| nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port); |
| if (IS_ERR(nsim_dev_port->ns)) { |
| err = PTR_ERR(nsim_dev_port->ns); |
| goto err_port_debugfs_exit; |
| } |
| |
| devlink_port_type_eth_set(devlink_port, nsim_dev_port->ns->netdev); |
| list_add(&nsim_dev_port->list, &nsim_dev->port_list); |
| |
| return 0; |
| |
| err_port_debugfs_exit: |
| nsim_dev_port_debugfs_exit(nsim_dev_port); |
| err_dl_port_unregister: |
| devlink_port_unregister(devlink_port); |
| err_port_free: |
| kfree(nsim_dev_port); |
| return err; |
| } |
| |
| static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port) |
| { |
| struct devlink_port *devlink_port = &nsim_dev_port->devlink_port; |
| |
| list_del(&nsim_dev_port->list); |
| devlink_port_type_clear(devlink_port); |
| nsim_destroy(nsim_dev_port->ns); |
| nsim_dev_port_debugfs_exit(nsim_dev_port); |
| devlink_port_unregister(devlink_port); |
| kfree(nsim_dev_port); |
| } |
| |
| static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev) |
| { |
| struct nsim_dev_port *nsim_dev_port, *tmp; |
| |
| mutex_lock(&nsim_dev->port_list_lock); |
| list_for_each_entry_safe(nsim_dev_port, tmp, |
| &nsim_dev->port_list, list) |
| __nsim_dev_port_del(nsim_dev_port); |
| mutex_unlock(&nsim_dev->port_list_lock); |
| } |
| |
| int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev) |
| { |
| struct nsim_dev *nsim_dev; |
| int i; |
| int err; |
| |
| nsim_dev = nsim_dev_create(nsim_bus_dev, nsim_bus_dev->port_count); |
| if (IS_ERR(nsim_dev)) |
| return PTR_ERR(nsim_dev); |
| dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev); |
| |
| mutex_lock(&nsim_dev->port_list_lock); |
| for (i = 0; i < nsim_bus_dev->port_count; i++) { |
| err = __nsim_dev_port_add(nsim_dev, i); |
| if (err) |
| goto err_port_del_all; |
| } |
| mutex_unlock(&nsim_dev->port_list_lock); |
| return 0; |
| |
| err_port_del_all: |
| mutex_unlock(&nsim_dev->port_list_lock); |
| nsim_dev_port_del_all(nsim_dev); |
| nsim_dev_destroy(nsim_dev); |
| return err; |
| } |
| |
| void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev) |
| { |
| struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); |
| |
| nsim_dev_port_del_all(nsim_dev); |
| nsim_dev_destroy(nsim_dev); |
| } |
| |
| static struct nsim_dev_port * |
| __nsim_dev_port_lookup(struct nsim_dev *nsim_dev, unsigned int port_index) |
| { |
| struct nsim_dev_port *nsim_dev_port; |
| |
| list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) |
| if (nsim_dev_port->port_index == port_index) |
| return nsim_dev_port; |
| return NULL; |
| } |
| |
| int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev, |
| unsigned int port_index) |
| { |
| struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); |
| int err; |
| |
| mutex_lock(&nsim_dev->port_list_lock); |
| if (__nsim_dev_port_lookup(nsim_dev, port_index)) |
| err = -EEXIST; |
| else |
| err = __nsim_dev_port_add(nsim_dev, port_index); |
| mutex_unlock(&nsim_dev->port_list_lock); |
| return err; |
| } |
| |
| int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev, |
| unsigned int port_index) |
| { |
| struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); |
| struct nsim_dev_port *nsim_dev_port; |
| int err = 0; |
| |
| mutex_lock(&nsim_dev->port_list_lock); |
| nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, port_index); |
| if (!nsim_dev_port) |
| err = -ENOENT; |
| else |
| __nsim_dev_port_del(nsim_dev_port); |
| mutex_unlock(&nsim_dev->port_list_lock); |
| return err; |
| } |
| |
| int nsim_dev_init(void) |
| { |
| nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL); |
| if (IS_ERR_OR_NULL(nsim_dev_ddir)) |
| return -ENOMEM; |
| return 0; |
| } |
| |
| void nsim_dev_exit(void) |
| { |
| debugfs_remove_recursive(nsim_dev_ddir); |
| } |