dev.c

   1/*
   2 * Copyright (c) 2018 Cumulus Networks. All rights reserved.
   3 * Copyright (c) 2018 David Ahern <dsa@cumulusnetworks.com>
   4 * Copyright (c) 2019 Mellanox Technologies. All rights reserved.
   5 *
   6 * This software is licensed under the GNU General License Version 2,
   7 * June 1991 as shown in the file COPYING in the top-level directory of this
   8 * source tree.
   9 *
  10 * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
  11 * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
  12 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  13 * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
  14 * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
  15 * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
  16 */
  17
  18#include <linux/debugfs.h>
  19#include <linux/device.h>
  20#include <linux/etherdevice.h>
  21#include <linux/inet.h>
  22#include <linux/jiffies.h>
  23#include <linux/kernel.h>
  24#include <linux/list.h>
  25#include <linux/mutex.h>
  26#include <linux/random.h>
  27#include <linux/rtnetlink.h>
  28#include <linux/workqueue.h>
  29#include <net/devlink.h>
  30#include <net/ip.h>
  31#include <net/flow_offload.h>
  32#include <uapi/linux/devlink.h>
  33#include <uapi/linux/ip.h>
  34#include <uapi/linux/udp.h>
  35
  36#include "netdevsim.h"
  37
  38static unsigned int
  39nsim_dev_port_index(enum nsim_dev_port_type type, unsigned int port_index)
  40{
  41	switch (type) {
  42	case NSIM_DEV_PORT_TYPE_VF:
  43		port_index = NSIM_DEV_VF_PORT_INDEX_BASE + port_index;
  44		break;
  45	case NSIM_DEV_PORT_TYPE_PF:
  46		break;
  47	}
  48
  49	return port_index;
  50}
  51
  52static inline unsigned int nsim_dev_port_index_to_vf_index(unsigned int port_index)
  53{
  54	return port_index - NSIM_DEV_VF_PORT_INDEX_BASE;
  55}
  56
  57static struct dentry *nsim_dev_ddir;
  58
  59unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev)
  60{
  61	WARN_ON(!lockdep_rtnl_is_held() &&
  62		!devl_lock_is_held(priv_to_devlink(nsim_dev)));
  63
  64	return nsim_dev->nsim_bus_dev->num_vfs;
  65}
  66
  67static void
  68nsim_bus_dev_set_vfs(struct nsim_bus_dev *nsim_bus_dev, unsigned int num_vfs)
  69{
  70	rtnl_lock();
  71	nsim_bus_dev->num_vfs = num_vfs;
  72	rtnl_unlock();
  73}
  74
  75#define NSIM_DEV_DUMMY_REGION_SIZE (1024 * 32)
  76
  77static int
  78nsim_dev_take_snapshot(struct devlink *devlink,
  79		       const struct devlink_region_ops *ops,
  80		       struct netlink_ext_ack *extack,
  81		       u8 **data)
  82{
  83	void *dummy_data;
  84
  85	dummy_data = kmalloc(NSIM_DEV_DUMMY_REGION_SIZE, GFP_KERNEL);
  86	if (!dummy_data)
  87		return -ENOMEM;
  88
  89	get_random_bytes(dummy_data, NSIM_DEV_DUMMY_REGION_SIZE);
  90
  91	*data = dummy_data;
  92
  93	return 0;
  94}
  95
  96static ssize_t nsim_dev_take_snapshot_write(struct file *file,
  97					    const char __user *data,
  98					    size_t count, loff_t *ppos)
  99{
 100	struct nsim_dev *nsim_dev = file->private_data;
 101	struct devlink *devlink;
 102	u8 *dummy_data;
 103	int err;
 104	u32 id;
 105
 106	devlink = priv_to_devlink(nsim_dev);
 107
 108	err = nsim_dev_take_snapshot(devlink, NULL, NULL, &dummy_data);
 109	if (err)
 110		return err;
 111
 112	err = devlink_region_snapshot_id_get(devlink, &id);
 113	if (err) {
 114		pr_err("Failed to get snapshot id\n");
 115		kfree(dummy_data);
 116		return err;
 117	}
 118	err = devlink_region_snapshot_create(nsim_dev->dummy_region,
 119					     dummy_data, id);
 120	devlink_region_snapshot_id_put(devlink, id);
 121	if (err) {
 122		pr_err("Failed to create region snapshot\n");
 123		kfree(dummy_data);
 124		return err;
 125	}
 126
 127	return count;
 128}
 129
 130static const struct file_operations nsim_dev_take_snapshot_fops = {
 131	.open = simple_open,
 132	.write = nsim_dev_take_snapshot_write,
 133	.llseek = generic_file_llseek,
 134	.owner = THIS_MODULE,
 135};
 136
 137static ssize_t nsim_dev_trap_fa_cookie_read(struct file *file,
 138					    char __user *data,
 139					    size_t count, loff_t *ppos)
 140{
 141	struct nsim_dev *nsim_dev = file->private_data;
 142	struct flow_action_cookie *fa_cookie;
 143	unsigned int buf_len;
 144	ssize_t ret;
 145	char *buf;
 146
 147	spin_lock(&nsim_dev->fa_cookie_lock);
 148	fa_cookie = nsim_dev->fa_cookie;
 149	if (!fa_cookie) {
 150		ret = -EINVAL;
 151		goto errout;
 152	}
 153	buf_len = fa_cookie->cookie_len * 2;
 154	buf = kmalloc(buf_len, GFP_ATOMIC);
 155	if (!buf) {
 156		ret = -ENOMEM;
 157		goto errout;
 158	}
 159	bin2hex(buf, fa_cookie->cookie, fa_cookie->cookie_len);
 160	spin_unlock(&nsim_dev->fa_cookie_lock);
 161
 162	ret = simple_read_from_buffer(data, count, ppos, buf, buf_len);
 163
 164	kfree(buf);
 165	return ret;
 166
 167errout:
 168	spin_unlock(&nsim_dev->fa_cookie_lock);
 169	return ret;
 170}
 171
 172static ssize_t nsim_dev_trap_fa_cookie_write(struct file *file,
 173					     const char __user *data,
 174					     size_t count, loff_t *ppos)
 175{
 176	struct nsim_dev *nsim_dev = file->private_data;
 177	struct flow_action_cookie *fa_cookie;
 178	size_t cookie_len;
 179	ssize_t ret;
 180	char *buf;
 181
 182	if (*ppos != 0)
 183		return -EINVAL;
 184	cookie_len = (count - 1) / 2;
 185	if ((count - 1) % 2)
 186		return -EINVAL;
 187
 188	buf = memdup_user(data, count);
 189	if (IS_ERR(buf))
 190		return PTR_ERR(buf);
 191
 192	fa_cookie = kmalloc(sizeof(*fa_cookie) + cookie_len,
 193			    GFP_KERNEL | __GFP_NOWARN);
 194	if (!fa_cookie) {
 195		ret = -ENOMEM;
 196		goto free_buf;
 197	}
 198
 199	fa_cookie->cookie_len = cookie_len;
 200	ret = hex2bin(fa_cookie->cookie, buf, cookie_len);
 201	if (ret)
 202		goto free_fa_cookie;
 203	kfree(buf);
 204
 205	spin_lock(&nsim_dev->fa_cookie_lock);
 206	kfree(nsim_dev->fa_cookie);
 207	nsim_dev->fa_cookie = fa_cookie;
 208	spin_unlock(&nsim_dev->fa_cookie_lock);
 209
 210	return count;
 211
 212free_fa_cookie:
 213	kfree(fa_cookie);
 214free_buf:
 215	kfree(buf);
 216	return ret;
 217}
 218
 219static const struct file_operations nsim_dev_trap_fa_cookie_fops = {
 220	.open = simple_open,
 221	.read = nsim_dev_trap_fa_cookie_read,
 222	.write = nsim_dev_trap_fa_cookie_write,
 223	.llseek = generic_file_llseek,
 224	.owner = THIS_MODULE,
 225};
 226
 227static ssize_t nsim_bus_dev_max_vfs_read(struct file *file, char __user *data,
 228					 size_t count, loff_t *ppos)
 229{
 230	struct nsim_dev *nsim_dev = file->private_data;
 231	char buf[11];
 232	ssize_t len;
 233
 234	len = scnprintf(buf, sizeof(buf), "%u\n",
 235			READ_ONCE(nsim_dev->nsim_bus_dev->max_vfs));
 236
 237	return simple_read_from_buffer(data, count, ppos, buf, len);
 238}
 239
 240static ssize_t nsim_bus_dev_max_vfs_write(struct file *file,
 241					  const char __user *data,
 242					  size_t count, loff_t *ppos)
 243{
 244	struct nsim_vf_config *vfconfigs;
 245	struct nsim_dev *nsim_dev;
 246	char buf[10];
 247	ssize_t ret;
 248	u32 val;
 249
 250	if (*ppos != 0)
 251		return 0;
 252
 253	if (count >= sizeof(buf))
 254		return -ENOSPC;
 255
 256	ret = copy_from_user(buf, data, count);
 257	if (ret)
 258		return -EFAULT;
 259	buf[count] = '\0';
 260
 261	ret = kstrtouint(buf, 10, &val);
 262	if (ret)
 263		return -EINVAL;
 264
 265	/* max_vfs limited by the maximum number of provided port indexes */
 266	if (val > NSIM_DEV_VF_PORT_INDEX_MAX - NSIM_DEV_VF_PORT_INDEX_BASE)
 267		return -ERANGE;
 268
 269	vfconfigs = kcalloc(val, sizeof(struct nsim_vf_config),
 270			    GFP_KERNEL | __GFP_NOWARN);
 271	if (!vfconfigs)
 272		return -ENOMEM;
 273
 274	nsim_dev = file->private_data;
 275	devl_lock(priv_to_devlink(nsim_dev));
 276	/* Reject if VFs are configured */
 277	if (nsim_dev_get_vfs(nsim_dev)) {
 278		ret = -EBUSY;
 279	} else {
 280		swap(nsim_dev->vfconfigs, vfconfigs);
 281		WRITE_ONCE(nsim_dev->nsim_bus_dev->max_vfs, val);
 282		*ppos += count;
 283		ret = count;
 284	}
 285	devl_unlock(priv_to_devlink(nsim_dev));
 286
 287	kfree(vfconfigs);
 288	return ret;
 289}
 290
 291static const struct file_operations nsim_dev_max_vfs_fops = {
 292	.open = simple_open,
 293	.read = nsim_bus_dev_max_vfs_read,
 294	.write = nsim_bus_dev_max_vfs_write,
 295	.llseek = generic_file_llseek,
 296	.owner = THIS_MODULE,
 297};
 298
 299static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
 300{
 301	char dev_ddir_name[sizeof(DRV_NAME) + 10];
 302	int err;
 303
 304	sprintf(dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id);
 305	nsim_dev->ddir = debugfs_create_dir(dev_ddir_name, nsim_dev_ddir);
 306	if (IS_ERR(nsim_dev->ddir))
 307		return PTR_ERR(nsim_dev->ddir);
 308	nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir);
 309	if (IS_ERR(nsim_dev->ports_ddir)) {
 310		err = PTR_ERR(nsim_dev->ports_ddir);
 311		goto err_ddir;
 312	}
 313	debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir,
 314			    &nsim_dev->fw_update_status);
 315	debugfs_create_u32("fw_update_overwrite_mask", 0600, nsim_dev->ddir,
 316			    &nsim_dev->fw_update_overwrite_mask);
 317	debugfs_create_u32("fw_update_flash_chunk_time_ms", 0600, nsim_dev->ddir,
 318			   &nsim_dev->fw_update_flash_chunk_time_ms);
 319	debugfs_create_u32("max_macs", 0600, nsim_dev->ddir,
 320			   &nsim_dev->max_macs);
 321	debugfs_create_bool("test1", 0600, nsim_dev->ddir,
 322			    &nsim_dev->test1);
 323	debugfs_create_u32("test2", 0600, nsim_dev->ddir,
 324			   &nsim_dev->test2);
 325	nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
 326						      0200,
 327						      nsim_dev->ddir,
 328						      nsim_dev,
 329						&nsim_dev_take_snapshot_fops);
 330	debugfs_create_bool("dont_allow_reload", 0600, nsim_dev->ddir,
 331			    &nsim_dev->dont_allow_reload);
 332	debugfs_create_bool("fail_reload", 0600, nsim_dev->ddir,
 333			    &nsim_dev->fail_reload);
 334	debugfs_create_file("trap_flow_action_cookie", 0600, nsim_dev->ddir,
 335			    nsim_dev, &nsim_dev_trap_fa_cookie_fops);
 336	debugfs_create_bool("fail_trap_group_set", 0600,
 337			    nsim_dev->ddir,
 338			    &nsim_dev->fail_trap_group_set);
 339	debugfs_create_bool("fail_trap_policer_set", 0600,
 340			    nsim_dev->ddir,
 341			    &nsim_dev->fail_trap_policer_set);
 342	debugfs_create_bool("fail_trap_policer_counter_get", 0600,
 343			    nsim_dev->ddir,
 344			    &nsim_dev->fail_trap_policer_counter_get);
 345	/* caution, dev_max_vfs write takes devlink lock */
 346	debugfs_create_file("max_vfs", 0600, nsim_dev->ddir,
 347			    nsim_dev, &nsim_dev_max_vfs_fops);
 348
 349	nsim_dev->nodes_ddir = debugfs_create_dir("rate_nodes", nsim_dev->ddir);
 350	if (IS_ERR(nsim_dev->nodes_ddir)) {
 351		err = PTR_ERR(nsim_dev->nodes_ddir);
 352		goto err_ports_ddir;
 353	}
 354	debugfs_create_bool("fail_trap_drop_counter_get", 0600,
 355			    nsim_dev->ddir,
 356			    &nsim_dev->fail_trap_drop_counter_get);
 357	nsim_udp_tunnels_debugfs_create(nsim_dev);
 358	return 0;
 359
 360err_ports_ddir:
 361	debugfs_remove_recursive(nsim_dev->ports_ddir);
 362err_ddir:
 363	debugfs_remove_recursive(nsim_dev->ddir);
 364	return err;
 365}
 366
 367static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev)
 368{
 369	debugfs_remove_recursive(nsim_dev->nodes_ddir);
 370	debugfs_remove_recursive(nsim_dev->ports_ddir);
 371	debugfs_remove_recursive(nsim_dev->ddir);
 372}
 373
 374static ssize_t nsim_dev_rate_parent_read(struct file *file,
 375					 char __user *data,
 376					 size_t count, loff_t *ppos)
 377{
 378	char **name_ptr = file->private_data;
 379	size_t len;
 380
 381	if (!*name_ptr)
 382		return 0;
 383
 384	len = strlen(*name_ptr);
 385	return simple_read_from_buffer(data, count, ppos, *name_ptr, len);
 386}
 387
 388static const struct file_operations nsim_dev_rate_parent_fops = {
 389	.open = simple_open,
 390	.read = nsim_dev_rate_parent_read,
 391	.llseek = generic_file_llseek,
 392	.owner = THIS_MODULE,
 393};
 394
 395static void nsim_dev_tc_bw_debugfs_init(struct dentry *ddir, u32 *tc_bw)
 396{
 397	int i;
 398
 399	for (i = 0; i < DEVLINK_RATE_TCS_MAX; i++) {
 400		char name[16];
 401
 402		snprintf(name, sizeof(name), "tc%d_bw", i);
 403		debugfs_create_u32(name, 0400, ddir, &tc_bw[i]);
 404	}
 405}
 406static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev,
 407				      struct nsim_dev_port *nsim_dev_port)
 408{
 409	struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
 410	unsigned int port_index = nsim_dev_port->port_index;
 411	char port_ddir_name[16];
 412	char dev_link_name[32];
 413
 414	sprintf(port_ddir_name, "%u", port_index);
 415	nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name,
 416						 nsim_dev->ports_ddir);
 417	if (IS_ERR(nsim_dev_port->ddir))
 418		return PTR_ERR(nsim_dev_port->ddir);
 419
 420	sprintf(dev_link_name, "../../../" DRV_NAME "%u", nsim_bus_dev->dev.id);
 421	if (nsim_dev_port_is_vf(nsim_dev_port)) {
 422		unsigned int vf_id = nsim_dev_port_index_to_vf_index(port_index);
 423
 424		debugfs_create_u16("tx_share", 0400, nsim_dev_port->ddir,
 425				   &nsim_dev->vfconfigs[vf_id].min_tx_rate);
 426		debugfs_create_u16("tx_max", 0400, nsim_dev_port->ddir,
 427				   &nsim_dev->vfconfigs[vf_id].max_tx_rate);
 428		nsim_dev_port->rate_parent = debugfs_create_file("rate_parent",
 429								 0400,
 430								 nsim_dev_port->ddir,
 431								 &nsim_dev_port->parent_name,
 432								 &nsim_dev_rate_parent_fops);
 433		nsim_dev_tc_bw_debugfs_init(nsim_dev_port->ddir,
 434					    nsim_dev_port->tc_bw);
 435	}
 436	debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name);
 437
 438	return 0;
 439}
 440
 441static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port)
 442{
 443	debugfs_remove_recursive(nsim_dev_port->ddir);
 444}
 445
 446static int nsim_dev_resources_register(struct devlink *devlink)
 447{
 448	struct devlink_resource_size_params params = {
 449		.size_max = (u64)-1,
 450		.size_granularity = 1,
 451		.unit = DEVLINK_RESOURCE_UNIT_ENTRY
 452	};
 453	int err;
 454
 455	/* Resources for IPv4 */
 456	err = devl_resource_register(devlink, "IPv4", (u64)-1,
 457				     NSIM_RESOURCE_IPV4,
 458				     DEVLINK_RESOURCE_ID_PARENT_TOP,
 459				     &params);
 460	if (err) {
 461		pr_err("Failed to register IPv4 top resource\n");
 462		goto err_out;
 463	}
 464
 465	err = devl_resource_register(devlink, "fib", (u64)-1,
 466				     NSIM_RESOURCE_IPV4_FIB,
 467				     NSIM_RESOURCE_IPV4, &params);
 468	if (err) {
 469		pr_err("Failed to register IPv4 FIB resource\n");
 470		goto err_out;
 471	}
 472
 473	err = devl_resource_register(devlink, "fib-rules", (u64)-1,
 474				     NSIM_RESOURCE_IPV4_FIB_RULES,
 475				     NSIM_RESOURCE_IPV4, &params);
 476	if (err) {
 477		pr_err("Failed to register IPv4 FIB rules resource\n");
 478		goto err_out;
 479	}
 480
 481	/* Resources for IPv6 */
 482	err = devl_resource_register(devlink, "IPv6", (u64)-1,
 483				     NSIM_RESOURCE_IPV6,
 484				     DEVLINK_RESOURCE_ID_PARENT_TOP,
 485				     &params);
 486	if (err) {
 487		pr_err("Failed to register IPv6 top resource\n");
 488		goto err_out;
 489	}
 490
 491	err = devl_resource_register(devlink, "fib", (u64)-1,
 492				     NSIM_RESOURCE_IPV6_FIB,
 493				     NSIM_RESOURCE_IPV6, &params);
 494	if (err) {
 495		pr_err("Failed to register IPv6 FIB resource\n");
 496		goto err_out;
 497	}
 498
 499	err = devl_resource_register(devlink, "fib-rules", (u64)-1,
 500				     NSIM_RESOURCE_IPV6_FIB_RULES,
 501				     NSIM_RESOURCE_IPV6, &params);
 502	if (err) {
 503		pr_err("Failed to register IPv6 FIB rules resource\n");
 504		goto err_out;
 505	}
 506
 507	/* Resources for nexthops */
 508	err = devl_resource_register(devlink, "nexthops", (u64)-1,
 509				     NSIM_RESOURCE_NEXTHOPS,
 510				     DEVLINK_RESOURCE_ID_PARENT_TOP,
 511				     &params);
 512	if (err) {
 513		pr_err("Failed to register NEXTHOPS resource\n");
 514		goto err_out;
 515	}
 516	return 0;
 517
 518err_out:
 519	devl_resources_unregister(devlink);
 520	return err;
 521}
 522
 523enum nsim_devlink_param_id {
 524	NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
 525	NSIM_DEVLINK_PARAM_ID_TEST1,
 526	NSIM_DEVLINK_PARAM_ID_TEST2,
 527};
 528
 529static int
 530nsim_devlink_param_test2_get(struct devlink *devlink, u32 id,
 531			     struct devlink_param_gset_ctx *ctx,
 532			     struct netlink_ext_ack *extack)
 533{
 534	struct nsim_dev *nsim_dev = devlink_priv(devlink);
 535
 536	ctx->val.vu32 = nsim_dev->test2;
 537	return 0;
 538}
 539
 540static int
 541nsim_devlink_param_test2_set(struct devlink *devlink, u32 id,
 542			     struct devlink_param_gset_ctx *ctx,
 543			     struct netlink_ext_ack *extack)
 544{
 545	struct nsim_dev *nsim_dev = devlink_priv(devlink);
 546
 547	nsim_dev->test2 = ctx->val.vu32;
 548	return 0;
 549}
 550
 551#define NSIM_DEV_TEST2_DEFAULT 1234
 552
 553static int
 554nsim_devlink_param_test2_get_default(struct devlink *devlink, u32 id,
 555				     struct devlink_param_gset_ctx *ctx,
 556				     struct netlink_ext_ack *extack)
 557{
 558	ctx->val.vu32 = NSIM_DEV_TEST2_DEFAULT;
 559	return 0;
 560}
 561
 562static int
 563nsim_devlink_param_test2_reset_default(struct devlink *devlink, u32 id,
 564				       enum devlink_param_cmode cmode,
 565				       struct netlink_ext_ack *extack)
 566{
 567	struct nsim_dev *nsim_dev = devlink_priv(devlink);
 568
 569	nsim_dev->test2 = NSIM_DEV_TEST2_DEFAULT;
 570	return 0;
 571}
 572
 573static const struct devlink_param nsim_devlink_params[] = {
 574	DEVLINK_PARAM_GENERIC(MAX_MACS,
 575			      BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
 576			      NULL, NULL, NULL),
 577	DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1,
 578			     "test1", DEVLINK_PARAM_TYPE_BOOL,
 579			     BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
 580			     NULL, NULL, NULL),
 581	DEVLINK_PARAM_DRIVER_WITH_DEFAULTS(NSIM_DEVLINK_PARAM_ID_TEST2,
 582					   "test2", DEVLINK_PARAM_TYPE_U32,
 583					   BIT(DEVLINK_PARAM_CMODE_RUNTIME),
 584					   nsim_devlink_param_test2_get,
 585					   nsim_devlink_param_test2_set,
 586					   NULL,
 587					   nsim_devlink_param_test2_get_default,
 588					   nsim_devlink_param_test2_reset_default),
 589};
 590
 591static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev,
 592						struct devlink *devlink)
 593{
 594	union devlink_param_value value;
 595
 596	value.vu32 = nsim_dev->max_macs;
 597	devl_param_driverinit_value_set(devlink,
 598					DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
 599					value);
 600	value.vbool = nsim_dev->test1;
 601	devl_param_driverinit_value_set(devlink,
 602					NSIM_DEVLINK_PARAM_ID_TEST1,
 603					value);
 604}
 605
 606static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink)
 607{
 608	struct nsim_dev *nsim_dev = devlink_priv(devlink);
 609	union devlink_param_value saved_value;
 610	int err;
 611
 612	err = devl_param_driverinit_value_get(devlink,
 613					      DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
 614					      &saved_value);
 615	if (!err)
 616		nsim_dev->max_macs = saved_value.vu32;
 617	err = devl_param_driverinit_value_get(devlink,
 618					      NSIM_DEVLINK_PARAM_ID_TEST1,
 619					      &saved_value);
 620	if (!err)
 621		nsim_dev->test1 = saved_value.vbool;
 622}
 623
 624#define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16
 625
 626static const struct devlink_region_ops dummy_region_ops = {
 627	.name = "dummy",
 628	.destructor = &kfree,
 629	.snapshot = nsim_dev_take_snapshot,
 630};
 631
 632static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev,
 633				      struct devlink *devlink)
 634{
 635	nsim_dev->dummy_region =
 636		devl_region_create(devlink, &dummy_region_ops,
 637				   NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX,
 638				   NSIM_DEV_DUMMY_REGION_SIZE);
 639	return PTR_ERR_OR_ZERO(nsim_dev->dummy_region);
 640}
 641
 642static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev)
 643{
 644	devl_region_destroy(nsim_dev->dummy_region);
 645}
 646
 647static int
 648__nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
 649		    unsigned int port_index, u8 perm_addr[ETH_ALEN]);
 650static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port);
 651
 652static int nsim_esw_legacy_enable(struct nsim_dev *nsim_dev,
 653				  struct netlink_ext_ack *extack)
 654{
 655	struct devlink *devlink = priv_to_devlink(nsim_dev);
 656	struct nsim_dev_port *nsim_dev_port, *tmp;
 657
 658	devl_rate_nodes_destroy(devlink);
 659	list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list)
 660		if (nsim_dev_port_is_vf(nsim_dev_port))
 661			__nsim_dev_port_del(nsim_dev_port);
 662	nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY;
 663	return 0;
 664}
 665
 666static int nsim_esw_switchdev_enable(struct nsim_dev *nsim_dev,
 667				     struct netlink_ext_ack *extack)
 668{
 669	struct nsim_dev_port *nsim_dev_port, *tmp;
 670	int i, err;
 671
 672	for (i = 0; i < nsim_dev_get_vfs(nsim_dev); i++) {
 673		err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_VF, i, NULL);
 674		if (err) {
 675			NL_SET_ERR_MSG_MOD(extack, "Failed to initialize VFs' netdevsim ports");
 676			pr_err("Failed to initialize VF id=%d. %d.\n", i, err);
 677			goto err_port_add_vfs;
 678		}
 679	}
 680	nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV;
 681	return 0;
 682
 683err_port_add_vfs:
 684	list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list)
 685		if (nsim_dev_port_is_vf(nsim_dev_port))
 686			__nsim_dev_port_del(nsim_dev_port);
 687	return err;
 688}
 689
 690static int nsim_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode,
 691					 struct netlink_ext_ack *extack)
 692{
 693	struct nsim_dev *nsim_dev = devlink_priv(devlink);
 694
 695	if (mode == nsim_dev->esw_mode)
 696		return 0;
 697
 698	if (mode == DEVLINK_ESWITCH_MODE_LEGACY)
 699		return nsim_esw_legacy_enable(nsim_dev, extack);
 700	if (mode == DEVLINK_ESWITCH_MODE_SWITCHDEV)
 701		return nsim_esw_switchdev_enable(nsim_dev, extack);
 702
 703	return -EINVAL;
 704}
 705
 706static int nsim_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
 707{
 708	struct nsim_dev *nsim_dev = devlink_priv(devlink);
 709
 710	*mode = nsim_dev->esw_mode;
 711	return 0;
 712}
 713
 714struct nsim_trap_item {
 715	void *trap_ctx;
 716	enum devlink_trap_action action;
 717};
 718
 719struct nsim_trap_data {
 720	struct delayed_work trap_report_dw;
 721	struct nsim_trap_item *trap_items_arr;
 722	u64 *trap_policers_cnt_arr;
 723	u64 trap_pkt_cnt;
 724	struct nsim_dev *nsim_dev;
 725	spinlock_t trap_lock;	/* Protects trap_items_arr */
 726};
 727
 728/* All driver-specific traps must be documented in
 729 * Documentation/networking/devlink/netdevsim.rst
 730 */
 731enum {
 732	NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX,
 733	NSIM_TRAP_ID_FID_MISS,
 734};
 735
 736#define NSIM_TRAP_NAME_FID_MISS "fid_miss"
 737
 738#define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT
 739
 740#define NSIM_TRAP_DROP(_id, _group_id)					      \
 741	DEVLINK_TRAP_GENERIC(DROP, DROP, _id,				      \
 742			     DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id,	      \
 743			     NSIM_TRAP_METADATA)
 744#define NSIM_TRAP_DROP_EXT(_id, _group_id, _metadata)			      \
 745	DEVLINK_TRAP_GENERIC(DROP, DROP, _id,				      \
 746			     DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id,	      \
 747			     NSIM_TRAP_METADATA | (_metadata))
 748#define NSIM_TRAP_EXCEPTION(_id, _group_id)				      \
 749	DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id,			      \
 750			     DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id,	      \
 751			     NSIM_TRAP_METADATA)
 752#define NSIM_TRAP_CONTROL(_id, _group_id, _action)			      \
 753	DEVLINK_TRAP_GENERIC(CONTROL, _action, _id,			      \
 754			     DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id,	      \
 755			     NSIM_TRAP_METADATA)
 756#define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id)			      \
 757	DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id,	      \
 758			    NSIM_TRAP_NAME_##_id,			      \
 759			    DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id,	      \
 760			    NSIM_TRAP_METADATA)
 761
 762#define NSIM_DEV_TRAP_POLICER_MIN_RATE	1
 763#define NSIM_DEV_TRAP_POLICER_MAX_RATE	8000
 764#define NSIM_DEV_TRAP_POLICER_MIN_BURST	8
 765#define NSIM_DEV_TRAP_POLICER_MAX_BURST	65536
 766
 767#define NSIM_TRAP_POLICER(_id, _rate, _burst)				      \
 768	DEVLINK_TRAP_POLICER(_id, _rate, _burst,			      \
 769			     NSIM_DEV_TRAP_POLICER_MAX_RATE,		      \
 770			     NSIM_DEV_TRAP_POLICER_MIN_RATE,		      \
 771			     NSIM_DEV_TRAP_POLICER_MAX_BURST,		      \
 772			     NSIM_DEV_TRAP_POLICER_MIN_BURST)
 773
 774static const struct devlink_trap_policer nsim_trap_policers_arr[] = {
 775	NSIM_TRAP_POLICER(1, 1000, 128),
 776	NSIM_TRAP_POLICER(2, 2000, 256),
 777	NSIM_TRAP_POLICER(3, 3000, 512),
 778};
 779
 780static const struct devlink_trap_group nsim_trap_groups_arr[] = {
 781	DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 0),
 782	DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1),
 783	DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1),
 784	DEVLINK_TRAP_GROUP_GENERIC(BUFFER_DROPS, 2),
 785	DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 3),
 786	DEVLINK_TRAP_GROUP_GENERIC(MC_SNOOPING, 3),
 787};
 788
 789static const struct devlink_trap nsim_traps_arr[] = {
 790	NSIM_TRAP_DROP(SMAC_MC, L2_DROPS),
 791	NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS),
 792	NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS),
 793	NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS),
 794	NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS),
 795	NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS),
 796	NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS),
 797	NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS),
 798	NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_EXCEPTIONS),
 799	NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS),
 800	NSIM_TRAP_DROP_EXT(INGRESS_FLOW_ACTION_DROP, ACL_DROPS,
 801			   DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
 802	NSIM_TRAP_DROP_EXT(EGRESS_FLOW_ACTION_DROP, ACL_DROPS,
 803			   DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
 804	NSIM_TRAP_CONTROL(IGMP_QUERY, MC_SNOOPING, MIRROR),
 805	NSIM_TRAP_CONTROL(IGMP_V1_REPORT, MC_SNOOPING, TRAP),
 806};
 807
 808#define NSIM_TRAP_L4_DATA_LEN 100
 809
 810static struct sk_buff *nsim_dev_trap_skb_build(void)
 811{
 812	int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN;
 813	struct sk_buff *skb;
 814	struct udphdr *udph;
 815	struct ethhdr *eth;
 816	struct iphdr *iph;
 817
 818	skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
 819	if (!skb)
 820		return NULL;
 821	tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len;
 822
 823	skb_reset_mac_header(skb);
 824	eth = skb_put(skb, sizeof(struct ethhdr));
 825	eth_random_addr(eth->h_dest);
 826	eth_random_addr(eth->h_source);
 827	eth->h_proto = htons(ETH_P_IP);
 828	skb->protocol = htons(ETH_P_IP);
 829
 830	skb_set_network_header(skb, skb->len);
 831	iph = skb_put(skb, sizeof(struct iphdr));
 832	iph->protocol = IPPROTO_UDP;
 833	iph->saddr = in_aton("192.0.2.1");
 834	iph->daddr = in_aton("198.51.100.1");
 835	iph->version = 0x4;
 836	iph->frag_off = 0;
 837	iph->ihl = 0x5;
 838	iph->tot_len = htons(tot_len);
 839	iph->ttl = 100;
 840	iph->check = 0;
 841	iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
 842
 843	skb_set_transport_header(skb, skb->len);
 844	udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len);
 845	get_random_bytes(&udph->source, sizeof(u16));
 846	get_random_bytes(&udph->dest, sizeof(u16));
 847	udph->len = htons(sizeof(struct udphdr) + data_len);
 848
 849	return skb;
 850}
 851
 852static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port)
 853{
 854	struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
 855	struct devlink *devlink = priv_to_devlink(nsim_dev);
 856	struct nsim_trap_data *nsim_trap_data;
 857	int i;
 858
 859	nsim_trap_data = nsim_dev->trap_data;
 860
 861	spin_lock(&nsim_trap_data->trap_lock);
 862	for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
 863		struct flow_action_cookie *fa_cookie = NULL;
 864		struct nsim_trap_item *nsim_trap_item;
 865		struct sk_buff *skb;
 866		bool has_fa_cookie;
 867
 868		has_fa_cookie = nsim_traps_arr[i].metadata_cap &
 869				DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE;
 870
 871		nsim_trap_item = &nsim_trap_data->trap_items_arr[i];
 872		if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP)
 873			continue;
 874
 875		skb = nsim_dev_trap_skb_build();
 876		if (!skb)
 877			continue;
 878		skb->dev = nsim_dev_port->ns->netdev;
 879
 880		/* Trapped packets are usually passed to devlink in softIRQ,
 881		 * but in this case they are generated in a workqueue. Disable
 882		 * softIRQs to prevent lockdep from complaining about
 883		 * "incosistent lock state".
 884		 */
 885
 886		spin_lock_bh(&nsim_dev->fa_cookie_lock);
 887		fa_cookie = has_fa_cookie ? nsim_dev->fa_cookie : NULL;
 888		devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx,
 889				    &nsim_dev_port->devlink_port, fa_cookie);
 890		spin_unlock_bh(&nsim_dev->fa_cookie_lock);
 891		consume_skb(skb);
 892	}
 893	spin_unlock(&nsim_trap_data->trap_lock);
 894}
 895
 896#define NSIM_TRAP_REPORT_INTERVAL_MS	100
 897
 898static void nsim_dev_trap_report_work(struct work_struct *work)
 899{
 900	struct nsim_trap_data *nsim_trap_data;
 901	struct nsim_dev_port *nsim_dev_port;
 902	struct nsim_dev *nsim_dev;
 903
 904	nsim_trap_data = container_of(work, struct nsim_trap_data,
 905				      trap_report_dw.work);
 906	nsim_dev = nsim_trap_data->nsim_dev;
 907
 908	if (!devl_trylock(priv_to_devlink(nsim_dev))) {
 909		queue_delayed_work(system_dfl_wq,
 910				   &nsim_dev->trap_data->trap_report_dw, 1);
 911		return;
 912	}
 913
 914	/* For each running port and enabled packet trap, generate a UDP
 915	 * packet with a random 5-tuple and report it.
 916	 */
 917	list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) {
 918		if (!netif_running(nsim_dev_port->ns->netdev))
 919			continue;
 920
 921		nsim_dev_trap_report(nsim_dev_port);
 922		cond_resched();
 923	}
 924	devl_unlock(priv_to_devlink(nsim_dev));
 925	queue_delayed_work(system_dfl_wq,
 926			   &nsim_dev->trap_data->trap_report_dw,
 927			   msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
 928}
 929
 930static int nsim_dev_traps_init(struct devlink *devlink)
 931{
 932	size_t policers_count = ARRAY_SIZE(nsim_trap_policers_arr);
 933	struct nsim_dev *nsim_dev = devlink_priv(devlink);
 934	struct nsim_trap_data *nsim_trap_data;
 935	int err;
 936
 937	nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL);
 938	if (!nsim_trap_data)
 939		return -ENOMEM;
 940
 941	nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr),
 942						 sizeof(struct nsim_trap_item),
 943						 GFP_KERNEL);
 944	if (!nsim_trap_data->trap_items_arr) {
 945		err = -ENOMEM;
 946		goto err_trap_data_free;
 947	}
 948
 949	nsim_trap_data->trap_policers_cnt_arr = kcalloc(policers_count,
 950							sizeof(u64),
 951							GFP_KERNEL);
 952	if (!nsim_trap_data->trap_policers_cnt_arr) {
 953		err = -ENOMEM;
 954		goto err_trap_items_free;
 955	}
 956
 957	/* The lock is used to protect the action state of the registered
 958	 * traps. The value is written by user and read in delayed work when
 959	 * iterating over all the traps.
 960	 */
 961	spin_lock_init(&nsim_trap_data->trap_lock);
 962	nsim_trap_data->nsim_dev = nsim_dev;
 963	nsim_dev->trap_data = nsim_trap_data;
 964
 965	err = devl_trap_policers_register(devlink, nsim_trap_policers_arr,
 966					  policers_count);
 967	if (err)
 968		goto err_trap_policers_cnt_free;
 969
 970	err = devl_trap_groups_register(devlink, nsim_trap_groups_arr,
 971					ARRAY_SIZE(nsim_trap_groups_arr));
 972	if (err)
 973		goto err_trap_policers_unregister;
 974
 975	err = devl_traps_register(devlink, nsim_traps_arr,
 976				  ARRAY_SIZE(nsim_traps_arr), NULL);
 977	if (err)
 978		goto err_trap_groups_unregister;
 979
 980	INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw,
 981			  nsim_dev_trap_report_work);
 982	queue_delayed_work(system_dfl_wq,
 983			   &nsim_dev->trap_data->trap_report_dw,
 984			   msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
 985
 986	return 0;
 987
 988err_trap_groups_unregister:
 989	devl_trap_groups_unregister(devlink, nsim_trap_groups_arr,
 990				    ARRAY_SIZE(nsim_trap_groups_arr));
 991err_trap_policers_unregister:
 992	devl_trap_policers_unregister(devlink, nsim_trap_policers_arr,
 993				      ARRAY_SIZE(nsim_trap_policers_arr));
 994err_trap_policers_cnt_free:
 995	kfree(nsim_trap_data->trap_policers_cnt_arr);
 996err_trap_items_free:
 997	kfree(nsim_trap_data->trap_items_arr);
 998err_trap_data_free:
 999	kfree(nsim_trap_data);
1000	return err;
1001}
1002
1003static void nsim_dev_traps_exit(struct devlink *devlink)
1004{
1005	struct nsim_dev *nsim_dev = devlink_priv(devlink);
1006
1007	/* caution, trap work takes devlink lock */
1008	cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw);
1009	devl_traps_unregister(devlink, nsim_traps_arr,
1010			      ARRAY_SIZE(nsim_traps_arr));
1011	devl_trap_groups_unregister(devlink, nsim_trap_groups_arr,
1012				    ARRAY_SIZE(nsim_trap_groups_arr));
1013	devl_trap_policers_unregister(devlink, nsim_trap_policers_arr,
1014				      ARRAY_SIZE(nsim_trap_policers_arr));
1015	kfree(nsim_dev->trap_data->trap_policers_cnt_arr);
1016	kfree(nsim_dev->trap_data->trap_items_arr);
1017	kfree(nsim_dev->trap_data);
1018}
1019
1020static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
1021				  struct netlink_ext_ack *extack);
1022static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev);
1023
1024static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change,
1025				enum devlink_reload_action action, enum devlink_reload_limit limit,
1026				struct netlink_ext_ack *extack)
1027{
1028	struct nsim_dev *nsim_dev = devlink_priv(devlink);
1029
1030	if (nsim_dev->dont_allow_reload) {
1031		/* For testing purposes, user set debugfs dont_allow_reload
1032		 * value to true. So forbid it.
1033		 */
1034		NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes");
1035		return -EOPNOTSUPP;
1036	}
1037
1038	nsim_dev_reload_destroy(nsim_dev);
1039	return 0;
1040}
1041
1042static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_action action,
1043			      enum devlink_reload_limit limit, u32 *actions_performed,
1044			      struct netlink_ext_ack *extack)
1045{
1046	struct nsim_dev *nsim_dev = devlink_priv(devlink);
1047
1048	if (nsim_dev->fail_reload) {
1049		/* For testing purposes, user set debugfs fail_reload
1050		 * value to true. Fail right away.
1051		 */
1052		NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes");
1053		return -EINVAL;
1054	}
1055
1056	*actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT);
1057
1058	return nsim_dev_reload_create(nsim_dev, extack);
1059}
1060
1061static int nsim_dev_info_get(struct devlink *devlink,
1062			     struct devlink_info_req *req,
1063			     struct netlink_ext_ack *extack)
1064{
1065	int err;
1066
1067	err = devlink_info_version_stored_put_ext(req, "fw.mgmt", "10.20.30",
1068						  DEVLINK_INFO_VERSION_TYPE_COMPONENT);
1069	if (err)
1070		return err;
1071	return devlink_info_version_running_put_ext(req, "fw.mgmt", "10.20.30",
1072						    DEVLINK_INFO_VERSION_TYPE_COMPONENT);
1073}
1074
1075#define NSIM_DEV_FLASH_SIZE 50000
1076#define NSIM_DEV_FLASH_CHUNK_SIZE 1000
1077#define NSIM_DEV_FLASH_CHUNK_TIME_MS_DEFAULT 100
1078
1079static int nsim_dev_flash_update(struct devlink *devlink,
1080				 struct devlink_flash_update_params *params,
1081				 struct netlink_ext_ack *extack)
1082{
1083	struct nsim_dev *nsim_dev = devlink_priv(devlink);
1084	int i;
1085
1086	if ((params->overwrite_mask & ~nsim_dev->fw_update_overwrite_mask) != 0)
1087		return -EOPNOTSUPP;
1088
1089	if (nsim_dev->fw_update_status) {
1090		devlink_flash_update_status_notify(devlink,
1091						   "Preparing to flash",
1092						   params->component, 0, 0);
1093	}
1094
1095	for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) {
1096		if (nsim_dev->fw_update_status)
1097			devlink_flash_update_status_notify(devlink, "Flashing",
1098							   params->component,
1099							   i * NSIM_DEV_FLASH_CHUNK_SIZE,
1100							   NSIM_DEV_FLASH_SIZE);
1101		msleep(nsim_dev->fw_update_flash_chunk_time_ms ?: 1);
1102	}
1103
1104	if (nsim_dev->fw_update_status) {
1105		devlink_flash_update_status_notify(devlink, "Flashing",
1106						   params->component,
1107						   NSIM_DEV_FLASH_SIZE,
1108						   NSIM_DEV_FLASH_SIZE);
1109		devlink_flash_update_timeout_notify(devlink, "Flash select",
1110						    params->component, 81);
1111		devlink_flash_update_status_notify(devlink, "Flashing done",
1112						   params->component, 0, 0);
1113	}
1114
1115	return 0;
1116}
1117
1118static struct nsim_trap_item *
1119nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id)
1120{
1121	struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data;
1122	int i;
1123
1124	for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
1125		if (nsim_traps_arr[i].id == trap_id)
1126			return &nsim_trap_data->trap_items_arr[i];
1127	}
1128
1129	return NULL;
1130}
1131
1132static int nsim_dev_devlink_trap_init(struct devlink *devlink,
1133				      const struct devlink_trap *trap,
1134				      void *trap_ctx)
1135{
1136	struct nsim_dev *nsim_dev = devlink_priv(devlink);
1137	struct nsim_trap_item *nsim_trap_item;
1138
1139	nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
1140	if (WARN_ON(!nsim_trap_item))
1141		return -ENOENT;
1142
1143	nsim_trap_item->trap_ctx = trap_ctx;
1144	nsim_trap_item->action = trap->init_action;
1145
1146	return 0;
1147}
1148
1149static int
1150nsim_dev_devlink_trap_action_set(struct devlink *devlink,
1151				 const struct devlink_trap *trap,
1152				 enum devlink_trap_action action,
1153				 struct netlink_ext_ack *extack)
1154{
1155	struct nsim_dev *nsim_dev = devlink_priv(devlink);
1156	struct nsim_trap_item *nsim_trap_item;
1157
1158	nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
1159	if (WARN_ON(!nsim_trap_item))
1160		return -ENOENT;
1161
1162	spin_lock(&nsim_dev->trap_data->trap_lock);
1163	nsim_trap_item->action = action;
1164	spin_unlock(&nsim_dev->trap_data->trap_lock);
1165
1166	return 0;
1167}
1168
1169static int
1170nsim_dev_devlink_trap_group_set(struct devlink *devlink,
1171				const struct devlink_trap_group *group,
1172				const struct devlink_trap_policer *policer,
1173				struct netlink_ext_ack *extack)
1174{
1175	struct nsim_dev *nsim_dev = devlink_priv(devlink);
1176
1177	if (nsim_dev->fail_trap_group_set)
1178		return -EINVAL;
1179
1180	return 0;
1181}
1182
1183static int
1184nsim_dev_devlink_trap_policer_set(struct devlink *devlink,
1185				  const struct devlink_trap_policer *policer,
1186				  u64 rate, u64 burst,
1187				  struct netlink_ext_ack *extack)
1188{
1189	struct nsim_dev *nsim_dev = devlink_priv(devlink);
1190
1191	if (nsim_dev->fail_trap_policer_set) {
1192		NL_SET_ERR_MSG_MOD(extack, "User setup the operation to fail for testing purposes");
1193		return -EINVAL;
1194	}
1195
1196	return 0;
1197}
1198
1199static int
1200nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink,
1201					  const struct devlink_trap_policer *policer,
1202					  u64 *p_drops)
1203{
1204	struct nsim_dev *nsim_dev = devlink_priv(devlink);
1205	u64 *cnt;
1206
1207	if (nsim_dev->fail_trap_policer_counter_get)
1208		return -EINVAL;
1209
1210	cnt = &nsim_dev->trap_data->trap_policers_cnt_arr[policer->id - 1];
1211	*p_drops = (*cnt)++;
1212
1213	return 0;
1214}
1215
1216#define NSIM_LINK_SPEED_MAX     5000 /* Mbps */
1217#define NSIM_LINK_SPEED_UNIT    125000 /* 1 Mbps given in bytes/sec to avoid
1218					* u64 overflow during conversion from
1219					* bytes to bits.
1220					*/
1221
1222static int nsim_rate_bytes_to_units(char *name, u64 *rate, struct netlink_ext_ack *extack)
1223{
1224	u64 val;
1225	u32 rem;
1226
1227	val = div_u64_rem(*rate, NSIM_LINK_SPEED_UNIT, &rem);
1228	if (rem) {
1229		pr_err("%s rate value %lluBps not in link speed units of 1Mbps.\n",
1230		       name, *rate);
1231		NL_SET_ERR_MSG_MOD(extack, "TX rate value not in link speed units of 1Mbps.");
1232		return -EINVAL;
1233	}
1234
1235	if (val > NSIM_LINK_SPEED_MAX) {
1236		pr_err("%s rate value %lluMbps exceed link maximum speed 5000Mbps.\n",
1237		       name, val);
1238		NL_SET_ERR_MSG_MOD(extack, "TX rate value exceed link maximum speed 5000Mbps.");
1239		return -EINVAL;
1240	}
1241	*rate = val;
1242	return 0;
1243}
1244
1245static int nsim_leaf_tc_bw_set(struct devlink_rate *devlink_rate,
1246			       void *priv, u32 *tc_bw,
1247			       struct netlink_ext_ack *extack)
1248{
1249	struct nsim_dev_port *nsim_dev_port = priv;
1250	int i;
1251
1252	for (i = 0; i < DEVLINK_RATE_TCS_MAX; i++)
1253		nsim_dev_port->tc_bw[i] = tc_bw[i];
1254
1255	return 0;
1256}
1257
1258static int nsim_leaf_tx_share_set(struct devlink_rate *devlink_rate, void *priv,
1259				  u64 tx_share, struct netlink_ext_ack *extack)
1260{
1261	struct nsim_dev_port *nsim_dev_port = priv;
1262	struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
1263	int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index);
1264	int err;
1265
1266	err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack);
1267	if (err)
1268		return err;
1269
1270	nsim_dev->vfconfigs[vf_id].min_tx_rate = tx_share;
1271	return 0;
1272}
1273
1274static int nsim_leaf_tx_max_set(struct devlink_rate *devlink_rate, void *priv,
1275				u64 tx_max, struct netlink_ext_ack *extack)
1276{
1277	struct nsim_dev_port *nsim_dev_port = priv;
1278	struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
1279	int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index);
1280	int err;
1281
1282	err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack);
1283	if (err)
1284		return err;
1285
1286	nsim_dev->vfconfigs[vf_id].max_tx_rate = tx_max;
1287	return 0;
1288}
1289
1290struct nsim_rate_node {
1291	struct dentry *ddir;
1292	struct dentry *rate_parent;
1293	char *parent_name;
1294	u16 tx_share;
1295	u16 tx_max;
1296	u32 tc_bw[DEVLINK_RATE_TCS_MAX];
1297};
1298
1299static int nsim_node_tc_bw_set(struct devlink_rate *devlink_rate, void *priv,
1300			       u32 *tc_bw, struct netlink_ext_ack *extack)
1301{
1302	struct nsim_rate_node *nsim_node = priv;
1303	int i;
1304
1305	for (i = 0; i < DEVLINK_RATE_TCS_MAX; i++)
1306		nsim_node->tc_bw[i] = tc_bw[i];
1307
1308	return 0;
1309}
1310
1311static int nsim_node_tx_share_set(struct devlink_rate *devlink_rate, void *priv,
1312				  u64 tx_share, struct netlink_ext_ack *extack)
1313{
1314	struct nsim_rate_node *nsim_node = priv;
1315	int err;
1316
1317	err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack);
1318	if (err)
1319		return err;
1320
1321	nsim_node->tx_share = tx_share;
1322	return 0;
1323}
1324
1325static int nsim_node_tx_max_set(struct devlink_rate *devlink_rate, void *priv,
1326				u64 tx_max, struct netlink_ext_ack *extack)
1327{
1328	struct nsim_rate_node *nsim_node = priv;
1329	int err;
1330
1331	err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack);
1332	if (err)
1333		return err;
1334
1335	nsim_node->tx_max = tx_max;
1336	return 0;
1337}
1338
1339static int nsim_rate_node_new(struct devlink_rate *node, void **priv,
1340			      struct netlink_ext_ack *extack)
1341{
1342	struct nsim_dev *nsim_dev = devlink_priv(node->devlink);
1343	struct nsim_rate_node *nsim_node;
1344
1345	if (!nsim_esw_mode_is_switchdev(nsim_dev)) {
1346		NL_SET_ERR_MSG_MOD(extack, "Node creation allowed only in switchdev mode.");
1347		return -EOPNOTSUPP;
1348	}
1349
1350	nsim_node = kzalloc(sizeof(*nsim_node), GFP_KERNEL);
1351	if (!nsim_node)
1352		return -ENOMEM;
1353
1354	nsim_node->ddir = debugfs_create_dir(node->name, nsim_dev->nodes_ddir);
1355
1356	debugfs_create_u16("tx_share", 0400, nsim_node->ddir, &nsim_node->tx_share);
1357	debugfs_create_u16("tx_max", 0400, nsim_node->ddir, &nsim_node->tx_max);
1358	nsim_node->rate_parent = debugfs_create_file("rate_parent", 0400,
1359						     nsim_node->ddir,
1360						     &nsim_node->parent_name,
1361						     &nsim_dev_rate_parent_fops);
1362
1363	nsim_dev_tc_bw_debugfs_init(nsim_node->ddir, nsim_node->tc_bw);
1364
1365	*priv = nsim_node;
1366	return 0;
1367}
1368
1369static int nsim_rate_node_del(struct devlink_rate *node, void *priv,
1370			      struct netlink_ext_ack *extack)
1371{
1372	struct nsim_rate_node *nsim_node = priv;
1373
1374	debugfs_remove(nsim_node->rate_parent);
1375	debugfs_remove_recursive(nsim_node->ddir);
1376	kfree(nsim_node);
1377	return 0;
1378}
1379
1380static int nsim_rate_leaf_parent_set(struct devlink_rate *child,
1381				     struct devlink_rate *parent,
1382				     void *priv_child, void *priv_parent,
1383				     struct netlink_ext_ack *extack)
1384{
1385	struct nsim_dev_port *nsim_dev_port = priv_child;
1386
1387	if (parent)
1388		nsim_dev_port->parent_name = parent->name;
1389	else
1390		nsim_dev_port->parent_name = NULL;
1391	return 0;
1392}
1393
1394static int nsim_rate_node_parent_set(struct devlink_rate *child,
1395				     struct devlink_rate *parent,
1396				     void *priv_child, void *priv_parent,
1397				     struct netlink_ext_ack *extack)
1398{
1399	struct nsim_rate_node *nsim_node = priv_child;
1400
1401	if (parent)
1402		nsim_node->parent_name = parent->name;
1403	else
1404		nsim_node->parent_name = NULL;
1405	return 0;
1406}
1407
1408static int
1409nsim_dev_devlink_trap_drop_counter_get(struct devlink *devlink,
1410				       const struct devlink_trap *trap,
1411				       u64 *p_drops)
1412{
1413	struct nsim_dev *nsim_dev = devlink_priv(devlink);
1414	u64 *cnt;
1415
1416	if (nsim_dev->fail_trap_drop_counter_get)
1417		return -EINVAL;
1418
1419	cnt = &nsim_dev->trap_data->trap_pkt_cnt;
1420	*p_drops = (*cnt)++;
1421
1422	return 0;
1423}
1424
1425static const struct devlink_ops nsim_dev_devlink_ops = {
1426	.eswitch_mode_set = nsim_devlink_eswitch_mode_set,
1427	.eswitch_mode_get = nsim_devlink_eswitch_mode_get,
1428	.supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK,
1429	.reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT),
1430	.reload_down = nsim_dev_reload_down,
1431	.reload_up = nsim_dev_reload_up,
1432	.info_get = nsim_dev_info_get,
1433	.flash_update = nsim_dev_flash_update,
1434	.trap_init = nsim_dev_devlink_trap_init,
1435	.trap_action_set = nsim_dev_devlink_trap_action_set,
1436	.trap_group_set = nsim_dev_devlink_trap_group_set,
1437	.trap_policer_set = nsim_dev_devlink_trap_policer_set,
1438	.trap_policer_counter_get = nsim_dev_devlink_trap_policer_counter_get,
1439	.rate_leaf_tx_share_set = nsim_leaf_tx_share_set,
1440	.rate_leaf_tx_max_set = nsim_leaf_tx_max_set,
1441	.rate_leaf_tc_bw_set = nsim_leaf_tc_bw_set,
1442	.rate_node_tx_share_set = nsim_node_tx_share_set,
1443	.rate_node_tx_max_set = nsim_node_tx_max_set,
1444	.rate_node_tc_bw_set = nsim_node_tc_bw_set,
1445	.rate_node_new = nsim_rate_node_new,
1446	.rate_node_del = nsim_rate_node_del,
1447	.rate_leaf_parent_set = nsim_rate_leaf_parent_set,
1448	.rate_node_parent_set = nsim_rate_node_parent_set,
1449	.trap_drop_counter_get = nsim_dev_devlink_trap_drop_counter_get,
1450};
1451
1452#define NSIM_DEV_MAX_MACS_DEFAULT 32
1453#define NSIM_DEV_TEST1_DEFAULT true
1454
1455static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
1456			       unsigned int port_index, u8 perm_addr[ETH_ALEN])
1457{
1458	struct devlink_port_attrs attrs = {};
1459	struct nsim_dev_port *nsim_dev_port;
1460	struct devlink_port *devlink_port;
1461	int err;
1462
1463	if (type == NSIM_DEV_PORT_TYPE_VF && !nsim_dev_get_vfs(nsim_dev))
1464		return -EINVAL;
1465
1466	nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL);
1467	if (!nsim_dev_port)
1468		return -ENOMEM;
1469	nsim_dev_port->port_index = nsim_dev_port_index(type, port_index);
1470	nsim_dev_port->port_type = type;
1471
1472	devlink_port = &nsim_dev_port->devlink_port;
1473	if (nsim_dev_port_is_pf(nsim_dev_port)) {
1474		attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
1475		attrs.phys.port_number = port_index + 1;
1476	} else {
1477		attrs.flavour = DEVLINK_PORT_FLAVOUR_PCI_VF;
1478		attrs.pci_vf.pf = 0;
1479		attrs.pci_vf.vf = port_index;
1480	}
1481	memcpy(attrs.switch_id.id, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
1482	attrs.switch_id.id_len = nsim_dev->switch_id.id_len;
1483	devlink_port_attrs_set(devlink_port, &attrs);
1484	err = devl_port_register(priv_to_devlink(nsim_dev), devlink_port,
1485				 nsim_dev_port->port_index);
1486	if (err)
1487		goto err_port_free;
1488
1489	err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port);
1490	if (err)
1491		goto err_dl_port_unregister;
1492
1493	nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port, perm_addr);
1494	if (IS_ERR(nsim_dev_port->ns)) {
1495		err = PTR_ERR(nsim_dev_port->ns);
1496		goto err_port_debugfs_exit;
1497	}
1498
1499	if (nsim_dev_port_is_vf(nsim_dev_port)) {
1500		err = devl_rate_leaf_create(&nsim_dev_port->devlink_port,
1501					    nsim_dev_port, NULL);
1502		if (err)
1503			goto err_nsim_destroy;
1504	}
1505
1506	list_add(&nsim_dev_port->list, &nsim_dev->port_list);
1507
1508	return 0;
1509
1510err_nsim_destroy:
1511	nsim_destroy(nsim_dev_port->ns);
1512err_port_debugfs_exit:
1513	nsim_dev_port_debugfs_exit(nsim_dev_port);
1514err_dl_port_unregister:
1515	devl_port_unregister(devlink_port);
1516err_port_free:
1517	kfree(nsim_dev_port);
1518	return err;
1519}
1520
1521static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port)
1522{
1523	struct devlink_port *devlink_port = &nsim_dev_port->devlink_port;
1524
1525	list_del(&nsim_dev_port->list);
1526	if (nsim_dev_port_is_vf(nsim_dev_port))
1527		devl_rate_leaf_destroy(&nsim_dev_port->devlink_port);
1528	nsim_destroy(nsim_dev_port->ns);
1529	nsim_dev_port_debugfs_exit(nsim_dev_port);
1530	devl_port_unregister(devlink_port);
1531	kfree(nsim_dev_port);
1532}
1533
1534static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev)
1535{
1536	struct nsim_dev_port *nsim_dev_port, *tmp;
1537
1538	list_for_each_entry_safe(nsim_dev_port, tmp,
1539				 &nsim_dev->port_list, list)
1540		__nsim_dev_port_del(nsim_dev_port);
1541}
1542
1543static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev,
1544				 unsigned int port_count)
1545{
1546	int i, err;
1547
1548	for (i = 0; i < port_count; i++) {
1549		err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_PF, i, NULL);
1550		if (err)
1551			goto err_port_del_all;
1552	}
1553	return 0;
1554
1555err_port_del_all:
1556	nsim_dev_port_del_all(nsim_dev);
1557	return err;
1558}
1559
1560static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
1561				  struct netlink_ext_ack *extack)
1562{
1563	struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
1564	struct devlink *devlink;
1565	int err;
1566
1567	devlink = priv_to_devlink(nsim_dev);
1568	nsim_dev = devlink_priv(devlink);
1569	INIT_LIST_HEAD(&nsim_dev->port_list);
1570	nsim_dev->fw_update_status = true;
1571	nsim_dev->fw_update_overwrite_mask = 0;
1572
1573	nsim_devlink_param_load_driverinit_values(devlink);
1574
1575	err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1576	if (err)
1577		return err;
1578
1579	err = nsim_dev_traps_init(devlink);
1580	if (err)
1581		goto err_dummy_region_exit;
1582
1583	nsim_dev->fib_data = nsim_fib_create(devlink, extack);
1584	if (IS_ERR(nsim_dev->fib_data)) {
1585		err = PTR_ERR(nsim_dev->fib_data);
1586		goto err_traps_exit;
1587	}
1588
1589	err = nsim_dev_health_init(nsim_dev, devlink);
1590	if (err)
1591		goto err_fib_destroy;
1592
1593	err = nsim_dev_psample_init(nsim_dev);
1594	if (err)
1595		goto err_health_exit;
1596
1597	err = nsim_dev_hwstats_init(nsim_dev);
1598	if (err)
1599		goto err_psample_exit;
1600
1601	err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
1602	if (err)
1603		goto err_hwstats_exit;
1604
1605	nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
1606						      0200,
1607						      nsim_dev->ddir,
1608						      nsim_dev,
1609						&nsim_dev_take_snapshot_fops);
1610	return 0;
1611
1612err_hwstats_exit:
1613	nsim_dev_hwstats_exit(nsim_dev);
1614err_psample_exit:
1615	nsim_dev_psample_exit(nsim_dev);
1616err_health_exit:
1617	nsim_dev_health_exit(nsim_dev);
1618err_fib_destroy:
1619	nsim_fib_destroy(devlink, nsim_dev->fib_data);
1620err_traps_exit:
1621	nsim_dev_traps_exit(devlink);
1622err_dummy_region_exit:
1623	nsim_dev_dummy_region_exit(nsim_dev);
1624	return err;
1625}
1626
1627int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev)
1628{
1629	struct nsim_dev *nsim_dev;
1630	struct devlink *devlink;
1631	int err;
1632
1633	devlink = devlink_alloc_ns(&nsim_dev_devlink_ops, sizeof(*nsim_dev),
1634				 nsim_bus_dev->initial_net, &nsim_bus_dev->dev);
1635	if (!devlink)
1636		return -ENOMEM;
1637	devl_lock(devlink);
1638	nsim_dev = devlink_priv(devlink);
1639	nsim_dev->nsim_bus_dev = nsim_bus_dev;
1640	nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id);
1641	get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
1642	INIT_LIST_HEAD(&nsim_dev->port_list);
1643	nsim_dev->fw_update_status = true;
1644	nsim_dev->fw_update_overwrite_mask = 0;
1645	nsim_dev->fw_update_flash_chunk_time_ms = NSIM_DEV_FLASH_CHUNK_TIME_MS_DEFAULT;
1646	nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT;
1647	nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT;
1648	nsim_dev->test2 = NSIM_DEV_TEST2_DEFAULT;
1649	spin_lock_init(&nsim_dev->fa_cookie_lock);
1650	mutex_init(&nsim_dev->progs_list_lock);
1651
1652	dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev);
1653
1654	nsim_dev->vfconfigs = kcalloc(nsim_bus_dev->max_vfs,
1655				      sizeof(struct nsim_vf_config),
1656				      GFP_KERNEL | __GFP_NOWARN);
1657	if (!nsim_dev->vfconfigs) {
1658		err = -ENOMEM;
1659		goto err_devlink_unlock;
1660	}
1661
1662	err = devl_register(devlink);
1663	if (err)
1664		goto err_vfc_free;
1665
1666	err = nsim_dev_resources_register(devlink);
1667	if (err)
1668		goto err_dl_unregister;
1669
1670	err = devl_params_register(devlink, nsim_devlink_params,
1671				   ARRAY_SIZE(nsim_devlink_params));
1672	if (err)
1673		goto err_resource_unregister;
1674	nsim_devlink_set_params_init_values(nsim_dev, devlink);
1675
1676	err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1677	if (err)
1678		goto err_params_unregister;
1679
1680	err = nsim_dev_traps_init(devlink);
1681	if (err)
1682		goto err_dummy_region_exit;
1683
1684	err = nsim_dev_debugfs_init(nsim_dev);
1685	if (err)
1686		goto err_traps_exit;
1687
1688	nsim_dev->fib_data = nsim_fib_create(devlink, NULL);
1689	if (IS_ERR(nsim_dev->fib_data)) {
1690		err = PTR_ERR(nsim_dev->fib_data);
1691		goto err_debugfs_exit;
1692	}
1693
1694	err = nsim_dev_health_init(nsim_dev, devlink);
1695	if (err)
1696		goto err_fib_destroy;
1697
1698	err = nsim_bpf_dev_init(nsim_dev);
1699	if (err)
1700		goto err_health_exit;
1701
1702	err = nsim_dev_psample_init(nsim_dev);
1703	if (err)
1704		goto err_bpf_dev_exit;
1705
1706	err = nsim_dev_hwstats_init(nsim_dev);
1707	if (err)
1708		goto err_psample_exit;
1709
1710	err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
1711	if (err)
1712		goto err_hwstats_exit;
1713
1714	nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY;
1715	devl_unlock(devlink);
1716	return 0;
1717
1718err_hwstats_exit:
1719	nsim_dev_hwstats_exit(nsim_dev);
1720err_psample_exit:
1721	nsim_dev_psample_exit(nsim_dev);
1722err_bpf_dev_exit:
1723	nsim_bpf_dev_exit(nsim_dev);
1724err_health_exit:
1725	nsim_dev_health_exit(nsim_dev);
1726err_fib_destroy:
1727	nsim_fib_destroy(devlink, nsim_dev->fib_data);
1728err_debugfs_exit:
1729	nsim_dev_debugfs_exit(nsim_dev);
1730err_traps_exit:
1731	nsim_dev_traps_exit(devlink);
1732err_dummy_region_exit:
1733	nsim_dev_dummy_region_exit(nsim_dev);
1734err_params_unregister:
1735	devl_params_unregister(devlink, nsim_devlink_params,
1736			       ARRAY_SIZE(nsim_devlink_params));
1737err_resource_unregister:
1738	devl_resources_unregister(devlink);
1739err_dl_unregister:
1740	devl_unregister(devlink);
1741err_vfc_free:
1742	kfree(nsim_dev->vfconfigs);
1743err_devlink_unlock:
1744	devl_unlock(devlink);
1745	devlink_free(devlink);
1746	dev_set_drvdata(&nsim_bus_dev->dev, NULL);
1747	return err;
1748}
1749
1750static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev)
1751{
1752	struct devlink *devlink = priv_to_devlink(nsim_dev);
1753
1754	if (devlink_is_reload_failed(devlink))
1755		return;
1756	debugfs_remove(nsim_dev->take_snapshot);
1757
1758	if (nsim_dev_get_vfs(nsim_dev)) {
1759		nsim_bus_dev_set_vfs(nsim_dev->nsim_bus_dev, 0);
1760		if (nsim_esw_mode_is_switchdev(nsim_dev))
1761			nsim_esw_legacy_enable(nsim_dev, NULL);
1762	}
1763
1764	nsim_dev_port_del_all(nsim_dev);
1765	nsim_dev_hwstats_exit(nsim_dev);
1766	nsim_dev_psample_exit(nsim_dev);
1767	nsim_dev_health_exit(nsim_dev);
1768	nsim_fib_destroy(devlink, nsim_dev->fib_data);
1769	nsim_dev_traps_exit(devlink);
1770	nsim_dev_dummy_region_exit(nsim_dev);
1771}
1772
1773void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev)
1774{
1775	struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1776	struct devlink *devlink = priv_to_devlink(nsim_dev);
1777
1778	devl_lock(devlink);
1779	nsim_dev_reload_destroy(nsim_dev);
1780
1781	nsim_bpf_dev_exit(nsim_dev);
1782	nsim_dev_debugfs_exit(nsim_dev);
1783	devl_params_unregister(devlink, nsim_devlink_params,
1784			       ARRAY_SIZE(nsim_devlink_params));
1785	devl_resources_unregister(devlink);
1786	devl_unregister(devlink);
1787	kfree(nsim_dev->vfconfigs);
1788	kfree(nsim_dev->fa_cookie);
1789	mutex_destroy(&nsim_dev->progs_list_lock);
1790	devl_unlock(devlink);
1791	devlink_free(devlink);
1792	dev_set_drvdata(&nsim_bus_dev->dev, NULL);
1793}
1794
1795static struct nsim_dev_port *
1796__nsim_dev_port_lookup(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
1797		       unsigned int port_index)
1798{
1799	struct nsim_dev_port *nsim_dev_port;
1800
1801	port_index = nsim_dev_port_index(type, port_index);
1802	list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list)
1803		if (nsim_dev_port->port_index == port_index)
1804			return nsim_dev_port;
1805	return NULL;
1806}
1807
1808int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type,
1809		      unsigned int port_index, u8 perm_addr[ETH_ALEN])
1810{
1811	struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1812	int err;
1813
1814	devl_lock(priv_to_devlink(nsim_dev));
1815	if (__nsim_dev_port_lookup(nsim_dev, type, port_index))
1816		err = -EEXIST;
1817	else
1818		err = __nsim_dev_port_add(nsim_dev, type, port_index, perm_addr);
1819	devl_unlock(priv_to_devlink(nsim_dev));
1820	return err;
1821}
1822
1823int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type,
1824		      unsigned int port_index)
1825{
1826	struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1827	struct nsim_dev_port *nsim_dev_port;
1828	int err = 0;
1829
1830	devl_lock(priv_to_devlink(nsim_dev));
1831	nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, type, port_index);
1832	if (!nsim_dev_port)
1833		err = -ENOENT;
1834	else
1835		__nsim_dev_port_del(nsim_dev_port);
1836	devl_unlock(priv_to_devlink(nsim_dev));
1837	return err;
1838}
1839
1840int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev,
1841			   unsigned int num_vfs)
1842{
1843	struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1844	struct devlink *devlink = priv_to_devlink(nsim_dev);
1845	int ret = 0;
1846
1847	devl_lock(devlink);
1848	if (nsim_bus_dev->num_vfs == num_vfs)
1849		goto exit_unlock;
1850	if (nsim_bus_dev->num_vfs && num_vfs) {
1851		ret = -EBUSY;
1852		goto exit_unlock;
1853	}
1854	if (nsim_bus_dev->max_vfs < num_vfs) {
1855		ret = -ENOMEM;
1856		goto exit_unlock;
1857	}
1858
1859	nsim_bus_dev_set_vfs(nsim_bus_dev, num_vfs);
1860	if (nsim_esw_mode_is_switchdev(nsim_dev)) {
1861		if (num_vfs) {
1862			ret = nsim_esw_switchdev_enable(nsim_dev, NULL);
1863			if (ret) {
1864				nsim_bus_dev_set_vfs(nsim_bus_dev, 0);
1865				goto exit_unlock;
1866			}
1867		} else {
1868			nsim_esw_legacy_enable(nsim_dev, NULL);
1869		}
1870	}
1871
1872exit_unlock:
1873	devl_unlock(devlink);
1874
1875	return ret;
1876}
1877
1878int nsim_dev_init(void)
1879{
1880	nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL);
1881	return PTR_ERR_OR_ZERO(nsim_dev_ddir);
1882}
1883
1884void nsim_dev_exit(void)
1885{
1886	debugfs_remove_recursive(nsim_dev_ddir);
1887}