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-rw-r--r--drivers/net/netdevsim/dev.c1780
1 files changed, 1780 insertions, 0 deletions
diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
new file mode 100644
index 0000000000..b4d3b9cde8
--- /dev/null
+++ b/drivers/net/netdevsim/dev.c
@@ -0,0 +1,1780 @@
+/*
+ * 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 = memdup_user(data, count);
+ if (IS_ERR(buf))
+ return PTR_ERR(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,
+ &params);
+ 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, &params);
+ 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, &params);
+ 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,
+ &params);
+ 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, &params);
+ 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, &params);
+ 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,
+ &params);
+ 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;
+ devl_param_driverinit_value_set(devlink,
+ DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
+ value);
+ value.vbool = nsim_dev->test1;
+ devl_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 = devl_param_driverinit_value_get(devlink,
+ DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
+ &saved_value);
+ if (!err)
+ nsim_dev->max_macs = saved_value.vu32;
+ err = devl_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_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, NULL);
+ 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 = devl_register(devlink);
+ if (err)
+ goto err_vfc_free;
+
+ err = nsim_dev_resources_register(devlink);
+ if (err)
+ goto err_dl_unregister;
+
+ err = devl_params_register(devlink, nsim_devlink_params,
+ ARRAY_SIZE(nsim_devlink_params));
+ if (err)
+ goto err_resource_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;
+ devl_unlock(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:
+ devl_params_unregister(devlink, nsim_devlink_params,
+ ARRAY_SIZE(nsim_devlink_params));
+err_resource_unregister:
+ devl_resources_unregister(devlink);
+err_dl_unregister:
+ devl_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);
+
+ devl_lock(devlink);
+ nsim_dev_reload_destroy(nsim_dev);
+
+ nsim_bpf_dev_exit(nsim_dev);
+ nsim_dev_debugfs_exit(nsim_dev);
+ devl_params_unregister(devlink, nsim_devlink_params,
+ ARRAY_SIZE(nsim_devlink_params));
+ devl_resources_unregister(devlink);
+ devl_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);
+}