| /* |
| * 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 <net/flow_offload.h> |
| #include <uapi/linux/devlink.h> |
| #include <uapi/linux/ip.h> |
| #include <uapi/linux/udp.h> |
| |
| #include "netdevsim.h" |
| |
| static unsigned int |
| nsim_dev_port_index(enum nsim_dev_port_type type, unsigned int port_index) |
| { |
| switch (type) { |
| case NSIM_DEV_PORT_TYPE_VF: |
| port_index = NSIM_DEV_VF_PORT_INDEX_BASE + port_index; |
| break; |
| case NSIM_DEV_PORT_TYPE_PF: |
| break; |
| } |
| |
| return port_index; |
| } |
| |
| static inline unsigned int nsim_dev_port_index_to_vf_index(unsigned int port_index) |
| { |
| return port_index - NSIM_DEV_VF_PORT_INDEX_BASE; |
| } |
| |
| static struct dentry *nsim_dev_ddir; |
| |
| unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev) |
| { |
| WARN_ON(!lockdep_rtnl_is_held() && |
| !devl_lock_is_held(priv_to_devlink(nsim_dev))); |
| |
| return nsim_dev->nsim_bus_dev->num_vfs; |
| } |
| |
| static void |
| nsim_bus_dev_set_vfs(struct nsim_bus_dev *nsim_bus_dev, unsigned int num_vfs) |
| { |
| rtnl_lock(); |
| nsim_bus_dev->num_vfs = num_vfs; |
| rtnl_unlock(); |
| } |
| |
| #define NSIM_DEV_DUMMY_REGION_SIZE (1024 * 32) |
| |
| static int |
| nsim_dev_take_snapshot(struct devlink *devlink, |
| const struct devlink_region_ops *ops, |
| struct netlink_ext_ack *extack, |
| u8 **data) |
| { |
| void *dummy_data; |
| |
| 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); |
| |
| *data = dummy_data; |
| |
| return 0; |
| } |
| |
| 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; |
| struct devlink *devlink; |
| u8 *dummy_data; |
| int err; |
| u32 id; |
| |
| devlink = priv_to_devlink(nsim_dev); |
| |
| err = nsim_dev_take_snapshot(devlink, NULL, NULL, &dummy_data); |
| if (err) |
| return err; |
| |
| err = devlink_region_snapshot_id_get(devlink, &id); |
| if (err) { |
| pr_err("Failed to get snapshot id\n"); |
| kfree(dummy_data); |
| return err; |
| } |
| err = devlink_region_snapshot_create(nsim_dev->dummy_region, |
| dummy_data, id); |
| devlink_region_snapshot_id_put(devlink, id); |
| 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, |
| .owner = THIS_MODULE, |
| }; |
| |
| static ssize_t nsim_dev_trap_fa_cookie_read(struct file *file, |
| char __user *data, |
| size_t count, loff_t *ppos) |
| { |
| struct nsim_dev *nsim_dev = file->private_data; |
| struct flow_action_cookie *fa_cookie; |
| unsigned int buf_len; |
| ssize_t ret; |
| char *buf; |
| |
| spin_lock(&nsim_dev->fa_cookie_lock); |
| fa_cookie = nsim_dev->fa_cookie; |
| if (!fa_cookie) { |
| ret = -EINVAL; |
| goto errout; |
| } |
| buf_len = fa_cookie->cookie_len * 2; |
| buf = kmalloc(buf_len, GFP_ATOMIC); |
| if (!buf) { |
| ret = -ENOMEM; |
| goto errout; |
| } |
| bin2hex(buf, fa_cookie->cookie, fa_cookie->cookie_len); |
| spin_unlock(&nsim_dev->fa_cookie_lock); |
| |
| ret = simple_read_from_buffer(data, count, ppos, buf, buf_len); |
| |
| kfree(buf); |
| return ret; |
| |
| errout: |
| spin_unlock(&nsim_dev->fa_cookie_lock); |
| return ret; |
| } |
| |
| static ssize_t nsim_dev_trap_fa_cookie_write(struct file *file, |
| const char __user *data, |
| size_t count, loff_t *ppos) |
| { |
| struct nsim_dev *nsim_dev = file->private_data; |
| struct flow_action_cookie *fa_cookie; |
| size_t cookie_len; |
| ssize_t ret; |
| char *buf; |
| |
| if (*ppos != 0) |
| return -EINVAL; |
| cookie_len = (count - 1) / 2; |
| if ((count - 1) % 2) |
| return -EINVAL; |
| buf = kmalloc(count, GFP_KERNEL | __GFP_NOWARN); |
| if (!buf) |
| return -ENOMEM; |
| |
| ret = simple_write_to_buffer(buf, count, ppos, data, count); |
| if (ret < 0) |
| goto free_buf; |
| |
| fa_cookie = kmalloc(sizeof(*fa_cookie) + cookie_len, |
| GFP_KERNEL | __GFP_NOWARN); |
| if (!fa_cookie) { |
| ret = -ENOMEM; |
| goto free_buf; |
| } |
| |
| fa_cookie->cookie_len = cookie_len; |
| ret = hex2bin(fa_cookie->cookie, buf, cookie_len); |
| if (ret) |
| goto free_fa_cookie; |
| kfree(buf); |
| |
| spin_lock(&nsim_dev->fa_cookie_lock); |
| kfree(nsim_dev->fa_cookie); |
| nsim_dev->fa_cookie = fa_cookie; |
| spin_unlock(&nsim_dev->fa_cookie_lock); |
| |
| return count; |
| |
| free_fa_cookie: |
| kfree(fa_cookie); |
| free_buf: |
| kfree(buf); |
| return ret; |
| } |
| |
| static const struct file_operations nsim_dev_trap_fa_cookie_fops = { |
| .open = simple_open, |
| .read = nsim_dev_trap_fa_cookie_read, |
| .write = nsim_dev_trap_fa_cookie_write, |
| .llseek = generic_file_llseek, |
| .owner = THIS_MODULE, |
| }; |
| |
| static ssize_t nsim_bus_dev_max_vfs_read(struct file *file, char __user *data, |
| size_t count, loff_t *ppos) |
| { |
| struct nsim_dev *nsim_dev = file->private_data; |
| char buf[11]; |
| ssize_t len; |
| |
| len = scnprintf(buf, sizeof(buf), "%u\n", |
| READ_ONCE(nsim_dev->nsim_bus_dev->max_vfs)); |
| |
| return simple_read_from_buffer(data, count, ppos, buf, len); |
| } |
| |
| static ssize_t nsim_bus_dev_max_vfs_write(struct file *file, |
| const char __user *data, |
| size_t count, loff_t *ppos) |
| { |
| struct nsim_vf_config *vfconfigs; |
| struct nsim_dev *nsim_dev; |
| char buf[10]; |
| ssize_t ret; |
| u32 val; |
| |
| if (*ppos != 0) |
| return 0; |
| |
| if (count >= sizeof(buf)) |
| return -ENOSPC; |
| |
| ret = copy_from_user(buf, data, count); |
| if (ret) |
| return -EFAULT; |
| buf[count] = '\0'; |
| |
| ret = kstrtouint(buf, 10, &val); |
| if (ret) |
| return -EINVAL; |
| |
| /* max_vfs limited by the maximum number of provided port indexes */ |
| if (val > NSIM_DEV_VF_PORT_INDEX_MAX - NSIM_DEV_VF_PORT_INDEX_BASE) |
| return -ERANGE; |
| |
| vfconfigs = kcalloc(val, sizeof(struct nsim_vf_config), |
| GFP_KERNEL | __GFP_NOWARN); |
| if (!vfconfigs) |
| return -ENOMEM; |
| |
| nsim_dev = file->private_data; |
| devl_lock(priv_to_devlink(nsim_dev)); |
| /* Reject if VFs are configured */ |
| if (nsim_dev_get_vfs(nsim_dev)) { |
| ret = -EBUSY; |
| } else { |
| swap(nsim_dev->vfconfigs, vfconfigs); |
| WRITE_ONCE(nsim_dev->nsim_bus_dev->max_vfs, val); |
| *ppos += count; |
| ret = count; |
| } |
| devl_unlock(priv_to_devlink(nsim_dev)); |
| |
| kfree(vfconfigs); |
| return ret; |
| } |
| |
| static const struct file_operations nsim_dev_max_vfs_fops = { |
| .open = simple_open, |
| .read = nsim_bus_dev_max_vfs_read, |
| .write = nsim_bus_dev_max_vfs_write, |
| .llseek = generic_file_llseek, |
| .owner = THIS_MODULE, |
| }; |
| |
| static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev) |
| { |
| char dev_ddir_name[sizeof(DRV_NAME) + 10]; |
| int err; |
| |
| 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(nsim_dev->ddir)) |
| return PTR_ERR(nsim_dev->ddir); |
| nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir); |
| if (IS_ERR(nsim_dev->ports_ddir)) { |
| err = PTR_ERR(nsim_dev->ports_ddir); |
| goto err_ddir; |
| } |
| debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir, |
| &nsim_dev->fw_update_status); |
| debugfs_create_u32("fw_update_overwrite_mask", 0600, nsim_dev->ddir, |
| &nsim_dev->fw_update_overwrite_mask); |
| debugfs_create_u32("max_macs", 0600, nsim_dev->ddir, |
| &nsim_dev->max_macs); |
| debugfs_create_bool("test1", 0600, nsim_dev->ddir, |
| &nsim_dev->test1); |
| nsim_dev->take_snapshot = debugfs_create_file("take_snapshot", |
| 0200, |
| nsim_dev->ddir, |
| nsim_dev, |
| &nsim_dev_take_snapshot_fops); |
| debugfs_create_bool("dont_allow_reload", 0600, nsim_dev->ddir, |
| &nsim_dev->dont_allow_reload); |
| debugfs_create_bool("fail_reload", 0600, nsim_dev->ddir, |
| &nsim_dev->fail_reload); |
| debugfs_create_file("trap_flow_action_cookie", 0600, nsim_dev->ddir, |
| nsim_dev, &nsim_dev_trap_fa_cookie_fops); |
| debugfs_create_bool("fail_trap_group_set", 0600, |
| nsim_dev->ddir, |
| &nsim_dev->fail_trap_group_set); |
| debugfs_create_bool("fail_trap_policer_set", 0600, |
| nsim_dev->ddir, |
| &nsim_dev->fail_trap_policer_set); |
| debugfs_create_bool("fail_trap_policer_counter_get", 0600, |
| nsim_dev->ddir, |
| &nsim_dev->fail_trap_policer_counter_get); |
| /* caution, dev_max_vfs write takes devlink lock */ |
| debugfs_create_file("max_vfs", 0600, nsim_dev->ddir, |
| nsim_dev, &nsim_dev_max_vfs_fops); |
| |
| nsim_dev->nodes_ddir = debugfs_create_dir("rate_nodes", nsim_dev->ddir); |
| if (IS_ERR(nsim_dev->nodes_ddir)) { |
| err = PTR_ERR(nsim_dev->nodes_ddir); |
| goto err_ports_ddir; |
| } |
| debugfs_create_bool("fail_trap_drop_counter_get", 0600, |
| nsim_dev->ddir, |
| &nsim_dev->fail_trap_drop_counter_get); |
| nsim_udp_tunnels_debugfs_create(nsim_dev); |
| return 0; |
| |
| err_ports_ddir: |
| debugfs_remove_recursive(nsim_dev->ports_ddir); |
| err_ddir: |
| debugfs_remove_recursive(nsim_dev->ddir); |
| return err; |
| } |
| |
| static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev) |
| { |
| debugfs_remove_recursive(nsim_dev->nodes_ddir); |
| debugfs_remove_recursive(nsim_dev->ports_ddir); |
| debugfs_remove_recursive(nsim_dev->ddir); |
| } |
| |
| static ssize_t nsim_dev_rate_parent_read(struct file *file, |
| char __user *data, |
| size_t count, loff_t *ppos) |
| { |
| char **name_ptr = file->private_data; |
| size_t len; |
| |
| if (!*name_ptr) |
| return 0; |
| |
| len = strlen(*name_ptr); |
| return simple_read_from_buffer(data, count, ppos, *name_ptr, len); |
| } |
| |
| static const struct file_operations nsim_dev_rate_parent_fops = { |
| .open = simple_open, |
| .read = nsim_dev_rate_parent_read, |
| .llseek = generic_file_llseek, |
| .owner = THIS_MODULE, |
| }; |
| |
| static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev, |
| struct nsim_dev_port *nsim_dev_port) |
| { |
| struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev; |
| unsigned int port_index = nsim_dev_port->port_index; |
| char port_ddir_name[16]; |
| char dev_link_name[32]; |
| |
| sprintf(port_ddir_name, "%u", port_index); |
| nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name, |
| nsim_dev->ports_ddir); |
| if (IS_ERR(nsim_dev_port->ddir)) |
| return PTR_ERR(nsim_dev_port->ddir); |
| |
| sprintf(dev_link_name, "../../../" DRV_NAME "%u", nsim_bus_dev->dev.id); |
| if (nsim_dev_port_is_vf(nsim_dev_port)) { |
| unsigned int vf_id = nsim_dev_port_index_to_vf_index(port_index); |
| |
| debugfs_create_u16("tx_share", 0400, nsim_dev_port->ddir, |
| &nsim_dev->vfconfigs[vf_id].min_tx_rate); |
| debugfs_create_u16("tx_max", 0400, nsim_dev_port->ddir, |
| &nsim_dev->vfconfigs[vf_id].max_tx_rate); |
| nsim_dev_port->rate_parent = debugfs_create_file("rate_parent", |
| 0400, |
| nsim_dev_port->ddir, |
| &nsim_dev_port->parent_name, |
| &nsim_dev_rate_parent_fops); |
| } |
| 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 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 |
| }; |
| int err; |
| |
| /* Resources for IPv4 */ |
| err = devl_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 err_out; |
| } |
| |
| err = devl_resource_register(devlink, "fib", (u64)-1, |
| NSIM_RESOURCE_IPV4_FIB, |
| NSIM_RESOURCE_IPV4, ¶ms); |
| if (err) { |
| pr_err("Failed to register IPv4 FIB resource\n"); |
| goto err_out; |
| } |
| |
| err = devl_resource_register(devlink, "fib-rules", (u64)-1, |
| NSIM_RESOURCE_IPV4_FIB_RULES, |
| NSIM_RESOURCE_IPV4, ¶ms); |
| if (err) { |
| pr_err("Failed to register IPv4 FIB rules resource\n"); |
| goto err_out; |
| } |
| |
| /* Resources for IPv6 */ |
| err = devl_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 err_out; |
| } |
| |
| err = devl_resource_register(devlink, "fib", (u64)-1, |
| NSIM_RESOURCE_IPV6_FIB, |
| NSIM_RESOURCE_IPV6, ¶ms); |
| if (err) { |
| pr_err("Failed to register IPv6 FIB resource\n"); |
| goto err_out; |
| } |
| |
| err = devl_resource_register(devlink, "fib-rules", (u64)-1, |
| NSIM_RESOURCE_IPV6_FIB_RULES, |
| NSIM_RESOURCE_IPV6, ¶ms); |
| if (err) { |
| pr_err("Failed to register IPv6 FIB rules resource\n"); |
| goto err_out; |
| } |
| |
| /* Resources for nexthops */ |
| err = devl_resource_register(devlink, "nexthops", (u64)-1, |
| NSIM_RESOURCE_NEXTHOPS, |
| DEVLINK_RESOURCE_ID_PARENT_TOP, |
| ¶ms); |
| if (err) { |
| pr_err("Failed to register NEXTHOPS resource\n"); |
| goto err_out; |
| } |
| return 0; |
| |
| err_out: |
| devl_resources_unregister(devlink); |
| 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 const struct devlink_region_ops dummy_region_ops = { |
| .name = "dummy", |
| .destructor = &kfree, |
| .snapshot = nsim_dev_take_snapshot, |
| }; |
| |
| static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev, |
| struct devlink *devlink) |
| { |
| nsim_dev->dummy_region = |
| devl_region_create(devlink, &dummy_region_ops, |
| 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) |
| { |
| devl_region_destroy(nsim_dev->dummy_region); |
| } |
| |
| static int |
| __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type, |
| unsigned int port_index); |
| static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port); |
| |
| static int nsim_esw_legacy_enable(struct nsim_dev *nsim_dev, |
| struct netlink_ext_ack *extack) |
| { |
| struct devlink *devlink = priv_to_devlink(nsim_dev); |
| struct nsim_dev_port *nsim_dev_port, *tmp; |
| |
| devl_rate_nodes_destroy(devlink); |
| list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list) |
| if (nsim_dev_port_is_vf(nsim_dev_port)) |
| __nsim_dev_port_del(nsim_dev_port); |
| nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY; |
| return 0; |
| } |
| |
| static int nsim_esw_switchdev_enable(struct nsim_dev *nsim_dev, |
| struct netlink_ext_ack *extack) |
| { |
| struct nsim_dev_port *nsim_dev_port, *tmp; |
| int i, err; |
| |
| for (i = 0; i < nsim_dev_get_vfs(nsim_dev); i++) { |
| err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_VF, i); |
| if (err) { |
| NL_SET_ERR_MSG_MOD(extack, "Failed to initialize VFs' netdevsim ports"); |
| pr_err("Failed to initialize VF id=%d. %d.\n", i, err); |
| goto err_port_add_vfs; |
| } |
| } |
| nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV; |
| return 0; |
| |
| err_port_add_vfs: |
| list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list) |
| if (nsim_dev_port_is_vf(nsim_dev_port)) |
| __nsim_dev_port_del(nsim_dev_port); |
| return err; |
| } |
| |
| static int nsim_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode, |
| struct netlink_ext_ack *extack) |
| { |
| struct nsim_dev *nsim_dev = devlink_priv(devlink); |
| |
| if (mode == nsim_dev->esw_mode) |
| return 0; |
| |
| if (mode == DEVLINK_ESWITCH_MODE_LEGACY) |
| return nsim_esw_legacy_enable(nsim_dev, extack); |
| if (mode == DEVLINK_ESWITCH_MODE_SWITCHDEV) |
| return nsim_esw_switchdev_enable(nsim_dev, extack); |
| |
| return -EINVAL; |
| } |
| |
| static int nsim_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode) |
| { |
| struct nsim_dev *nsim_dev = devlink_priv(devlink); |
| |
| *mode = nsim_dev->esw_mode; |
| return 0; |
| } |
| |
| 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; |
| u64 *trap_policers_cnt_arr; |
| u64 trap_pkt_cnt; |
| struct nsim_dev *nsim_dev; |
| spinlock_t trap_lock; /* Protects trap_items_arr */ |
| }; |
| |
| /* All driver-specific traps must be documented in |
| * Documentation/networking/devlink/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_ID_##_group_id, \ |
| NSIM_TRAP_METADATA) |
| #define NSIM_TRAP_DROP_EXT(_id, _group_id, _metadata) \ |
| DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ |
| DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ |
| NSIM_TRAP_METADATA | (_metadata)) |
| #define NSIM_TRAP_EXCEPTION(_id, _group_id) \ |
| DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \ |
| DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ |
| NSIM_TRAP_METADATA) |
| #define NSIM_TRAP_CONTROL(_id, _group_id, _action) \ |
| DEVLINK_TRAP_GENERIC(CONTROL, _action, _id, \ |
| DEVLINK_TRAP_GROUP_GENERIC_ID_##_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_ID_##_group_id, \ |
| NSIM_TRAP_METADATA) |
| |
| #define NSIM_DEV_TRAP_POLICER_MIN_RATE 1 |
| #define NSIM_DEV_TRAP_POLICER_MAX_RATE 8000 |
| #define NSIM_DEV_TRAP_POLICER_MIN_BURST 8 |
| #define NSIM_DEV_TRAP_POLICER_MAX_BURST 65536 |
| |
| #define NSIM_TRAP_POLICER(_id, _rate, _burst) \ |
| DEVLINK_TRAP_POLICER(_id, _rate, _burst, \ |
| NSIM_DEV_TRAP_POLICER_MAX_RATE, \ |
| NSIM_DEV_TRAP_POLICER_MIN_RATE, \ |
| NSIM_DEV_TRAP_POLICER_MAX_BURST, \ |
| NSIM_DEV_TRAP_POLICER_MIN_BURST) |
| |
| static const struct devlink_trap_policer nsim_trap_policers_arr[] = { |
| NSIM_TRAP_POLICER(1, 1000, 128), |
| NSIM_TRAP_POLICER(2, 2000, 256), |
| NSIM_TRAP_POLICER(3, 3000, 512), |
| }; |
| |
| static const struct devlink_trap_group nsim_trap_groups_arr[] = { |
| DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 0), |
| DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1), |
| DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1), |
| DEVLINK_TRAP_GROUP_GENERIC(BUFFER_DROPS, 2), |
| DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 3), |
| DEVLINK_TRAP_GROUP_GENERIC(MC_SNOOPING, 3), |
| }; |
| |
| 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_EXCEPTIONS), |
| NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS), |
| NSIM_TRAP_DROP_EXT(INGRESS_FLOW_ACTION_DROP, ACL_DROPS, |
| DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE), |
| NSIM_TRAP_DROP_EXT(EGRESS_FLOW_ACTION_DROP, ACL_DROPS, |
| DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE), |
| NSIM_TRAP_CONTROL(IGMP_QUERY, MC_SNOOPING, MIRROR), |
| NSIM_TRAP_CONTROL(IGMP_V1_REPORT, MC_SNOOPING, TRAP), |
| }; |
| |
| #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 flow_action_cookie *fa_cookie = NULL; |
| struct nsim_trap_item *nsim_trap_item; |
| struct sk_buff *skb; |
| bool has_fa_cookie; |
| |
| has_fa_cookie = nsim_traps_arr[i].metadata_cap & |
| DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE; |
| |
| 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". |
| */ |
| |
| spin_lock_bh(&nsim_dev->fa_cookie_lock); |
| fa_cookie = has_fa_cookie ? nsim_dev->fa_cookie : NULL; |
| devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx, |
| &nsim_dev_port->devlink_port, fa_cookie); |
| spin_unlock_bh(&nsim_dev->fa_cookie_lock); |
| 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. |
| */ |
| if (!devl_trylock(priv_to_devlink(nsim_dev))) { |
| schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw, 0); |
| return; |
| } |
| |
| 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); |
| } |
| devl_unlock(priv_to_devlink(nsim_dev)); |
| |
| 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) |
| { |
| size_t policers_count = ARRAY_SIZE(nsim_trap_policers_arr); |
| 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; |
| } |
| |
| nsim_trap_data->trap_policers_cnt_arr = kcalloc(policers_count, |
| sizeof(u64), |
| GFP_KERNEL); |
| if (!nsim_trap_data->trap_policers_cnt_arr) { |
| err = -ENOMEM; |
| goto err_trap_items_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 = devl_trap_policers_register(devlink, nsim_trap_policers_arr, |
| policers_count); |
| if (err) |
| goto err_trap_policers_cnt_free; |
| |
| err = devl_trap_groups_register(devlink, nsim_trap_groups_arr, |
| ARRAY_SIZE(nsim_trap_groups_arr)); |
| if (err) |
| goto err_trap_policers_unregister; |
| |
| err = devl_traps_register(devlink, nsim_traps_arr, |
| ARRAY_SIZE(nsim_traps_arr), NULL); |
| if (err) |
| goto err_trap_groups_unregister; |
| |
| 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_groups_unregister: |
| devl_trap_groups_unregister(devlink, nsim_trap_groups_arr, |
| ARRAY_SIZE(nsim_trap_groups_arr)); |
| err_trap_policers_unregister: |
| devl_trap_policers_unregister(devlink, nsim_trap_policers_arr, |
| ARRAY_SIZE(nsim_trap_policers_arr)); |
| err_trap_policers_cnt_free: |
| kfree(nsim_trap_data->trap_policers_cnt_arr); |
| 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); |
| |
| /* caution, trap work takes devlink lock */ |
| cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw); |
| devl_traps_unregister(devlink, nsim_traps_arr, |
| ARRAY_SIZE(nsim_traps_arr)); |
| devl_trap_groups_unregister(devlink, nsim_trap_groups_arr, |
| ARRAY_SIZE(nsim_trap_groups_arr)); |
| devl_trap_policers_unregister(devlink, nsim_trap_policers_arr, |
| ARRAY_SIZE(nsim_trap_policers_arr)); |
| kfree(nsim_dev->trap_data->trap_policers_cnt_arr); |
| kfree(nsim_dev->trap_data->trap_items_arr); |
| kfree(nsim_dev->trap_data); |
| } |
| |
| static int nsim_dev_reload_create(struct nsim_dev *nsim_dev, |
| struct netlink_ext_ack *extack); |
| static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev); |
| |
| static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change, |
| enum devlink_reload_action action, enum devlink_reload_limit limit, |
| struct netlink_ext_ack *extack) |
| { |
| struct nsim_dev *nsim_dev = devlink_priv(devlink); |
| |
| if (nsim_dev->dont_allow_reload) { |
| /* For testing purposes, user set debugfs dont_allow_reload |
| * value to true. So forbid it. |
| */ |
| NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes"); |
| return -EOPNOTSUPP; |
| } |
| |
| nsim_dev_reload_destroy(nsim_dev); |
| return 0; |
| } |
| |
| static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_action action, |
| enum devlink_reload_limit limit, u32 *actions_performed, |
| struct netlink_ext_ack *extack) |
| { |
| struct nsim_dev *nsim_dev = devlink_priv(devlink); |
| |
| if (nsim_dev->fail_reload) { |
| /* For testing purposes, user set debugfs fail_reload |
| * value to true. Fail right away. |
| */ |
| NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes"); |
| return -EINVAL; |
| } |
| |
| *actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT); |
| |
| return nsim_dev_reload_create(nsim_dev, extack); |
| } |
| |
| static int nsim_dev_info_get(struct devlink *devlink, |
| struct devlink_info_req *req, |
| struct netlink_ext_ack *extack) |
| { |
| int err; |
| |
| err = devlink_info_driver_name_put(req, DRV_NAME); |
| if (err) |
| return err; |
| err = devlink_info_version_stored_put_ext(req, "fw.mgmt", "10.20.30", |
| DEVLINK_INFO_VERSION_TYPE_COMPONENT); |
| if (err) |
| return err; |
| return devlink_info_version_running_put_ext(req, "fw.mgmt", "10.20.30", |
| DEVLINK_INFO_VERSION_TYPE_COMPONENT); |
| } |
| |
| #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, |
| struct devlink_flash_update_params *params, |
| struct netlink_ext_ack *extack) |
| { |
| struct nsim_dev *nsim_dev = devlink_priv(devlink); |
| int i; |
| |
| if ((params->overwrite_mask & ~nsim_dev->fw_update_overwrite_mask) != 0) |
| return -EOPNOTSUPP; |
| |
| if (nsim_dev->fw_update_status) { |
| devlink_flash_update_status_notify(devlink, |
| "Preparing to flash", |
| params->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", |
| params->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", |
| params->component, |
| NSIM_DEV_FLASH_SIZE, |
| NSIM_DEV_FLASH_SIZE); |
| devlink_flash_update_timeout_notify(devlink, "Flash select", |
| params->component, 81); |
| devlink_flash_update_status_notify(devlink, "Flashing done", |
| params->component, 0, 0); |
| } |
| |
| 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 netlink_ext_ack *extack) |
| { |
| 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 int |
| nsim_dev_devlink_trap_group_set(struct devlink *devlink, |
| const struct devlink_trap_group *group, |
| const struct devlink_trap_policer *policer, |
| struct netlink_ext_ack *extack) |
| { |
| struct nsim_dev *nsim_dev = devlink_priv(devlink); |
| |
| if (nsim_dev->fail_trap_group_set) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static int |
| nsim_dev_devlink_trap_policer_set(struct devlink *devlink, |
| const struct devlink_trap_policer *policer, |
| u64 rate, u64 burst, |
| struct netlink_ext_ack *extack) |
| { |
| struct nsim_dev *nsim_dev = devlink_priv(devlink); |
| |
| if (nsim_dev->fail_trap_policer_set) { |
| NL_SET_ERR_MSG_MOD(extack, "User setup the operation to fail for testing purposes"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int |
| nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink, |
| const struct devlink_trap_policer *policer, |
| u64 *p_drops) |
| { |
| struct nsim_dev *nsim_dev = devlink_priv(devlink); |
| u64 *cnt; |
| |
| if (nsim_dev->fail_trap_policer_counter_get) |
| return -EINVAL; |
| |
| cnt = &nsim_dev->trap_data->trap_policers_cnt_arr[policer->id - 1]; |
| *p_drops = (*cnt)++; |
| |
| return 0; |
| } |
| |
| #define NSIM_LINK_SPEED_MAX 5000 /* Mbps */ |
| #define NSIM_LINK_SPEED_UNIT 125000 /* 1 Mbps given in bytes/sec to avoid |
| * u64 overflow during conversion from |
| * bytes to bits. |
| */ |
| |
| static int nsim_rate_bytes_to_units(char *name, u64 *rate, struct netlink_ext_ack *extack) |
| { |
| u64 val; |
| u32 rem; |
| |
| val = div_u64_rem(*rate, NSIM_LINK_SPEED_UNIT, &rem); |
| if (rem) { |
| pr_err("%s rate value %lluBps not in link speed units of 1Mbps.\n", |
| name, *rate); |
| NL_SET_ERR_MSG_MOD(extack, "TX rate value not in link speed units of 1Mbps."); |
| return -EINVAL; |
| } |
| |
| if (val > NSIM_LINK_SPEED_MAX) { |
| pr_err("%s rate value %lluMbps exceed link maximum speed 5000Mbps.\n", |
| name, val); |
| NL_SET_ERR_MSG_MOD(extack, "TX rate value exceed link maximum speed 5000Mbps."); |
| return -EINVAL; |
| } |
| *rate = val; |
| return 0; |
| } |
| |
| static int nsim_leaf_tx_share_set(struct devlink_rate *devlink_rate, void *priv, |
| u64 tx_share, struct netlink_ext_ack *extack) |
| { |
| struct nsim_dev_port *nsim_dev_port = priv; |
| struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; |
| int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index); |
| int err; |
| |
| err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack); |
| if (err) |
| return err; |
| |
| nsim_dev->vfconfigs[vf_id].min_tx_rate = tx_share; |
| return 0; |
| } |
| |
| static int nsim_leaf_tx_max_set(struct devlink_rate *devlink_rate, void *priv, |
| u64 tx_max, struct netlink_ext_ack *extack) |
| { |
| struct nsim_dev_port *nsim_dev_port = priv; |
| struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; |
| int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index); |
| int err; |
| |
| err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack); |
| if (err) |
| return err; |
| |
| nsim_dev->vfconfigs[vf_id].max_tx_rate = tx_max; |
| return 0; |
| } |
| |
| struct nsim_rate_node { |
| struct dentry *ddir; |
| struct dentry *rate_parent; |
| char *parent_name; |
| u16 tx_share; |
| u16 tx_max; |
| }; |
| |
| static int nsim_node_tx_share_set(struct devlink_rate *devlink_rate, void *priv, |
| u64 tx_share, struct netlink_ext_ack *extack) |
| { |
| struct nsim_rate_node *nsim_node = priv; |
| int err; |
| |
| err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack); |
| if (err) |
| return err; |
| |
| nsim_node->tx_share = tx_share; |
| return 0; |
| } |
| |
| static int nsim_node_tx_max_set(struct devlink_rate *devlink_rate, void *priv, |
| u64 tx_max, struct netlink_ext_ack *extack) |
| { |
| struct nsim_rate_node *nsim_node = priv; |
| int err; |
| |
| err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack); |
| if (err) |
| return err; |
| |
| nsim_node->tx_max = tx_max; |
| return 0; |
| } |
| |
| static int nsim_rate_node_new(struct devlink_rate *node, void **priv, |
| struct netlink_ext_ack *extack) |
| { |
| struct nsim_dev *nsim_dev = devlink_priv(node->devlink); |
| struct nsim_rate_node *nsim_node; |
| |
| if (!nsim_esw_mode_is_switchdev(nsim_dev)) { |
| NL_SET_ERR_MSG_MOD(extack, "Node creation allowed only in switchdev mode."); |
| return -EOPNOTSUPP; |
| } |
| |
| nsim_node = kzalloc(sizeof(*nsim_node), GFP_KERNEL); |
| if (!nsim_node) |
| return -ENOMEM; |
| |
| nsim_node->ddir = debugfs_create_dir(node->name, nsim_dev->nodes_ddir); |
| |
| debugfs_create_u16("tx_share", 0400, nsim_node->ddir, &nsim_node->tx_share); |
| debugfs_create_u16("tx_max", 0400, nsim_node->ddir, &nsim_node->tx_max); |
| nsim_node->rate_parent = debugfs_create_file("rate_parent", 0400, |
| nsim_node->ddir, |
| &nsim_node->parent_name, |
| &nsim_dev_rate_parent_fops); |
| |
| *priv = nsim_node; |
| return 0; |
| } |
| |
| static int nsim_rate_node_del(struct devlink_rate *node, void *priv, |
| struct netlink_ext_ack *extack) |
| { |
| struct nsim_rate_node *nsim_node = priv; |
| |
| debugfs_remove(nsim_node->rate_parent); |
| debugfs_remove_recursive(nsim_node->ddir); |
| kfree(nsim_node); |
| return 0; |
| } |
| |
| static int nsim_rate_leaf_parent_set(struct devlink_rate *child, |
| struct devlink_rate *parent, |
| void *priv_child, void *priv_parent, |
| struct netlink_ext_ack *extack) |
| { |
| struct nsim_dev_port *nsim_dev_port = priv_child; |
| |
| if (parent) |
| nsim_dev_port->parent_name = parent->name; |
| else |
| nsim_dev_port->parent_name = NULL; |
| return 0; |
| } |
| |
| static int nsim_rate_node_parent_set(struct devlink_rate *child, |
| struct devlink_rate *parent, |
| void *priv_child, void *priv_parent, |
| struct netlink_ext_ack *extack) |
| { |
| struct nsim_rate_node *nsim_node = priv_child; |
| |
| if (parent) |
| nsim_node->parent_name = parent->name; |
| else |
| nsim_node->parent_name = NULL; |
| return 0; |
| } |
| |
| static int |
| nsim_dev_devlink_trap_drop_counter_get(struct devlink *devlink, |
| const struct devlink_trap *trap, |
| u64 *p_drops) |
| { |
| struct nsim_dev *nsim_dev = devlink_priv(devlink); |
| u64 *cnt; |
| |
| if (nsim_dev->fail_trap_drop_counter_get) |
| return -EINVAL; |
| |
| cnt = &nsim_dev->trap_data->trap_pkt_cnt; |
| *p_drops = (*cnt)++; |
| |
| return 0; |
| } |
| |
| static const struct devlink_ops nsim_dev_devlink_ops = { |
| .eswitch_mode_set = nsim_devlink_eswitch_mode_set, |
| .eswitch_mode_get = nsim_devlink_eswitch_mode_get, |
| .supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK, |
| .reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT), |
| .reload_down = nsim_dev_reload_down, |
| .reload_up = nsim_dev_reload_up, |
| .info_get = nsim_dev_info_get, |
| .flash_update = nsim_dev_flash_update, |
| .trap_init = nsim_dev_devlink_trap_init, |
| .trap_action_set = nsim_dev_devlink_trap_action_set, |
| .trap_group_set = nsim_dev_devlink_trap_group_set, |
| .trap_policer_set = nsim_dev_devlink_trap_policer_set, |
| .trap_policer_counter_get = nsim_dev_devlink_trap_policer_counter_get, |
| .rate_leaf_tx_share_set = nsim_leaf_tx_share_set, |
| .rate_leaf_tx_max_set = nsim_leaf_tx_max_set, |
| .rate_node_tx_share_set = nsim_node_tx_share_set, |
| .rate_node_tx_max_set = nsim_node_tx_max_set, |
| .rate_node_new = nsim_rate_node_new, |
| .rate_node_del = nsim_rate_node_del, |
| .rate_leaf_parent_set = nsim_rate_leaf_parent_set, |
| .rate_node_parent_set = nsim_rate_node_parent_set, |
| .trap_drop_counter_get = nsim_dev_devlink_trap_drop_counter_get, |
| }; |
| |
| #define NSIM_DEV_MAX_MACS_DEFAULT 32 |
| #define NSIM_DEV_TEST1_DEFAULT true |
| |
| static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type, |
| unsigned int port_index) |
| { |
| struct devlink_port_attrs attrs = {}; |
| struct nsim_dev_port *nsim_dev_port; |
| struct devlink_port *devlink_port; |
| int err; |
| |
| if (type == NSIM_DEV_PORT_TYPE_VF && !nsim_dev_get_vfs(nsim_dev)) |
| return -EINVAL; |
| |
| nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL); |
| if (!nsim_dev_port) |
| return -ENOMEM; |
| nsim_dev_port->port_index = nsim_dev_port_index(type, port_index); |
| nsim_dev_port->port_type = type; |
| |
| devlink_port = &nsim_dev_port->devlink_port; |
| if (nsim_dev_port_is_pf(nsim_dev_port)) { |
| attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL; |
| attrs.phys.port_number = port_index + 1; |
| } else { |
| attrs.flavour = DEVLINK_PORT_FLAVOUR_PCI_VF; |
| attrs.pci_vf.pf = 0; |
| attrs.pci_vf.vf = port_index; |
| } |
| memcpy(attrs.switch_id.id, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len); |
| attrs.switch_id.id_len = nsim_dev->switch_id.id_len; |
| devlink_port_attrs_set(devlink_port, &attrs); |
| err = devl_port_register(priv_to_devlink(nsim_dev), devlink_port, |
| nsim_dev_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; |
| } |
| |
| if (nsim_dev_port_is_vf(nsim_dev_port)) { |
| err = devl_rate_leaf_create(&nsim_dev_port->devlink_port, |
| nsim_dev_port); |
| if (err) |
| goto err_nsim_destroy; |
| } |
| |
| list_add(&nsim_dev_port->list, &nsim_dev->port_list); |
| |
| return 0; |
| |
| err_nsim_destroy: |
| nsim_destroy(nsim_dev_port->ns); |
| err_port_debugfs_exit: |
| nsim_dev_port_debugfs_exit(nsim_dev_port); |
| err_dl_port_unregister: |
| devl_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); |
| if (nsim_dev_port_is_vf(nsim_dev_port)) |
| devl_rate_leaf_destroy(&nsim_dev_port->devlink_port); |
| nsim_destroy(nsim_dev_port->ns); |
| nsim_dev_port_debugfs_exit(nsim_dev_port); |
| devl_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; |
| |
| list_for_each_entry_safe(nsim_dev_port, tmp, |
| &nsim_dev->port_list, list) |
| __nsim_dev_port_del(nsim_dev_port); |
| } |
| |
| static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev, |
| unsigned int port_count) |
| { |
| int i, err; |
| |
| for (i = 0; i < port_count; i++) { |
| err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_PF, i); |
| if (err) |
| goto err_port_del_all; |
| } |
| return 0; |
| |
| err_port_del_all: |
| nsim_dev_port_del_all(nsim_dev); |
| return err; |
| } |
| |
| static int nsim_dev_reload_create(struct nsim_dev *nsim_dev, |
| struct netlink_ext_ack *extack) |
| { |
| struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev; |
| struct devlink *devlink; |
| int err; |
| |
| devlink = priv_to_devlink(nsim_dev); |
| nsim_dev = devlink_priv(devlink); |
| INIT_LIST_HEAD(&nsim_dev->port_list); |
| nsim_dev->fw_update_status = true; |
| nsim_dev->fw_update_overwrite_mask = 0; |
| |
| nsim_devlink_param_load_driverinit_values(devlink); |
| |
| err = nsim_dev_dummy_region_init(nsim_dev, devlink); |
| if (err) |
| return err; |
| |
| err = nsim_dev_traps_init(devlink); |
| if (err) |
| goto err_dummy_region_exit; |
| |
| nsim_dev->fib_data = nsim_fib_create(devlink, extack); |
| if (IS_ERR(nsim_dev->fib_data)) { |
| err = PTR_ERR(nsim_dev->fib_data); |
| goto err_traps_exit; |
| } |
| |
| err = nsim_dev_health_init(nsim_dev, devlink); |
| if (err) |
| goto err_fib_destroy; |
| |
| err = nsim_dev_psample_init(nsim_dev); |
| if (err) |
| goto err_health_exit; |
| |
| err = nsim_dev_hwstats_init(nsim_dev); |
| if (err) |
| goto err_psample_exit; |
| |
| err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count); |
| if (err) |
| goto err_hwstats_exit; |
| |
| nsim_dev->take_snapshot = debugfs_create_file("take_snapshot", |
| 0200, |
| nsim_dev->ddir, |
| nsim_dev, |
| &nsim_dev_take_snapshot_fops); |
| return 0; |
| |
| err_hwstats_exit: |
| nsim_dev_hwstats_exit(nsim_dev); |
| err_psample_exit: |
| nsim_dev_psample_exit(nsim_dev); |
| err_health_exit: |
| nsim_dev_health_exit(nsim_dev); |
| err_fib_destroy: |
| nsim_fib_destroy(devlink, nsim_dev->fib_data); |
| err_traps_exit: |
| nsim_dev_traps_exit(devlink); |
| err_dummy_region_exit: |
| nsim_dev_dummy_region_exit(nsim_dev); |
| return err; |
| } |
| |
| int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev) |
| { |
| struct nsim_dev *nsim_dev; |
| struct devlink *devlink; |
| int err; |
| |
| devlink = devlink_alloc_ns(&nsim_dev_devlink_ops, sizeof(*nsim_dev), |
| nsim_bus_dev->initial_net, &nsim_bus_dev->dev); |
| if (!devlink) |
| return -ENOMEM; |
| devl_lock(devlink); |
| 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); |
| nsim_dev->fw_update_status = true; |
| nsim_dev->fw_update_overwrite_mask = 0; |
| nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT; |
| nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT; |
| spin_lock_init(&nsim_dev->fa_cookie_lock); |
| |
| dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev); |
| |
| nsim_dev->vfconfigs = kcalloc(nsim_bus_dev->max_vfs, |
| sizeof(struct nsim_vf_config), |
| GFP_KERNEL | __GFP_NOWARN); |
| if (!nsim_dev->vfconfigs) { |
| err = -ENOMEM; |
| goto err_devlink_unlock; |
| } |
| |
| err = nsim_dev_resources_register(devlink); |
| if (err) |
| goto err_vfc_free; |
| |
| 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; |
| |
| nsim_dev->fib_data = nsim_fib_create(devlink, NULL); |
| if (IS_ERR(nsim_dev->fib_data)) { |
| err = PTR_ERR(nsim_dev->fib_data); |
| goto err_debugfs_exit; |
| } |
| |
| err = nsim_dev_health_init(nsim_dev, devlink); |
| if (err) |
| goto err_fib_destroy; |
| |
| err = nsim_bpf_dev_init(nsim_dev); |
| if (err) |
| goto err_health_exit; |
| |
| err = nsim_dev_psample_init(nsim_dev); |
| if (err) |
| goto err_bpf_dev_exit; |
| |
| err = nsim_dev_hwstats_init(nsim_dev); |
| if (err) |
| goto err_psample_exit; |
| |
| err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count); |
| if (err) |
| goto err_hwstats_exit; |
| |
| nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY; |
| devlink_set_features(devlink, DEVLINK_F_RELOAD); |
| devl_unlock(devlink); |
| devlink_register(devlink); |
| return 0; |
| |
| err_hwstats_exit: |
| nsim_dev_hwstats_exit(nsim_dev); |
| err_psample_exit: |
| nsim_dev_psample_exit(nsim_dev); |
| err_bpf_dev_exit: |
| nsim_bpf_dev_exit(nsim_dev); |
| err_health_exit: |
| nsim_dev_health_exit(nsim_dev); |
| err_fib_destroy: |
| nsim_fib_destroy(devlink, nsim_dev->fib_data); |
| 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: |
| devl_resources_unregister(devlink); |
| err_vfc_free: |
| kfree(nsim_dev->vfconfigs); |
| err_devlink_unlock: |
| devl_unlock(devlink); |
| devlink_free(devlink); |
| dev_set_drvdata(&nsim_bus_dev->dev, NULL); |
| return err; |
| } |
| |
| static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev) |
| { |
| struct devlink *devlink = priv_to_devlink(nsim_dev); |
| |
| if (devlink_is_reload_failed(devlink)) |
| return; |
| debugfs_remove(nsim_dev->take_snapshot); |
| |
| if (nsim_dev_get_vfs(nsim_dev)) { |
| nsim_bus_dev_set_vfs(nsim_dev->nsim_bus_dev, 0); |
| if (nsim_esw_mode_is_switchdev(nsim_dev)) |
| nsim_esw_legacy_enable(nsim_dev, NULL); |
| } |
| |
| nsim_dev_port_del_all(nsim_dev); |
| nsim_dev_hwstats_exit(nsim_dev); |
| nsim_dev_psample_exit(nsim_dev); |
| nsim_dev_health_exit(nsim_dev); |
| nsim_fib_destroy(devlink, nsim_dev->fib_data); |
| nsim_dev_traps_exit(devlink); |
| nsim_dev_dummy_region_exit(nsim_dev); |
| } |
| |
| void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev) |
| { |
| struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); |
| struct devlink *devlink = priv_to_devlink(nsim_dev); |
| |
| devlink_unregister(devlink); |
| devl_lock(devlink); |
| nsim_dev_reload_destroy(nsim_dev); |
| |
| nsim_bpf_dev_exit(nsim_dev); |
| nsim_dev_debugfs_exit(nsim_dev); |
| devlink_params_unregister(devlink, nsim_devlink_params, |
| ARRAY_SIZE(nsim_devlink_params)); |
| devl_resources_unregister(devlink); |
| kfree(nsim_dev->vfconfigs); |
| kfree(nsim_dev->fa_cookie); |
| devl_unlock(devlink); |
| devlink_free(devlink); |
| dev_set_drvdata(&nsim_bus_dev->dev, NULL); |
| } |
| |
| static struct nsim_dev_port * |
| __nsim_dev_port_lookup(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type, |
| unsigned int port_index) |
| { |
| struct nsim_dev_port *nsim_dev_port; |
| |
| port_index = nsim_dev_port_index(type, port_index); |
| 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_drv_port_add(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type, |
| unsigned int port_index) |
| { |
| struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); |
| int err; |
| |
| devl_lock(priv_to_devlink(nsim_dev)); |
| if (__nsim_dev_port_lookup(nsim_dev, type, port_index)) |
| err = -EEXIST; |
| else |
| err = __nsim_dev_port_add(nsim_dev, type, port_index); |
| devl_unlock(priv_to_devlink(nsim_dev)); |
| return err; |
| } |
| |
| int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type, |
| 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; |
| |
| devl_lock(priv_to_devlink(nsim_dev)); |
| nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, type, port_index); |
| if (!nsim_dev_port) |
| err = -ENOENT; |
| else |
| __nsim_dev_port_del(nsim_dev_port); |
| devl_unlock(priv_to_devlink(nsim_dev)); |
| return err; |
| } |
| |
| int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev, |
| unsigned int num_vfs) |
| { |
| struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); |
| struct devlink *devlink = priv_to_devlink(nsim_dev); |
| int ret = 0; |
| |
| devl_lock(devlink); |
| if (nsim_bus_dev->num_vfs == num_vfs) |
| goto exit_unlock; |
| if (nsim_bus_dev->num_vfs && num_vfs) { |
| ret = -EBUSY; |
| goto exit_unlock; |
| } |
| if (nsim_bus_dev->max_vfs < num_vfs) { |
| ret = -ENOMEM; |
| goto exit_unlock; |
| } |
| |
| nsim_bus_dev_set_vfs(nsim_bus_dev, num_vfs); |
| if (nsim_esw_mode_is_switchdev(nsim_dev)) { |
| if (num_vfs) { |
| ret = nsim_esw_switchdev_enable(nsim_dev, NULL); |
| if (ret) { |
| nsim_bus_dev_set_vfs(nsim_bus_dev, 0); |
| goto exit_unlock; |
| } |
| } else { |
| nsim_esw_legacy_enable(nsim_dev, NULL); |
| } |
| } |
| |
| exit_unlock: |
| devl_unlock(devlink); |
| |
| return ret; |
| } |
| |
| int nsim_dev_init(void) |
| { |
| nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL); |
| return PTR_ERR_OR_ZERO(nsim_dev_ddir); |
| } |
| |
| void nsim_dev_exit(void) |
| { |
| debugfs_remove_recursive(nsim_dev_ddir); |
| } |