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("max_macs", 0600, nsim_dev->ddir,
 318			   &nsim_dev->max_macs);
 319	debugfs_create_bool("test1", 0600, nsim_dev->ddir,
 320			    &nsim_dev->test1);
 321	nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
 322						      0200,
 323						      nsim_dev->ddir,
 324						      nsim_dev,
 325						&nsim_dev_take_snapshot_fops);
 326	debugfs_create_bool("dont_allow_reload", 0600, nsim_dev->ddir,
 327			    &nsim_dev->dont_allow_reload);
 328	debugfs_create_bool("fail_reload", 0600, nsim_dev->ddir,
 329			    &nsim_dev->fail_reload);
 330	debugfs_create_file("trap_flow_action_cookie", 0600, nsim_dev->ddir,
 331			    nsim_dev, &nsim_dev_trap_fa_cookie_fops);
 332	debugfs_create_bool("fail_trap_group_set", 0600,
 333			    nsim_dev->ddir,
 334			    &nsim_dev->fail_trap_group_set);
 335	debugfs_create_bool("fail_trap_policer_set", 0600,
 336			    nsim_dev->ddir,
 337			    &nsim_dev->fail_trap_policer_set);
 338	debugfs_create_bool("fail_trap_policer_counter_get", 0600,
 339			    nsim_dev->ddir,
 340			    &nsim_dev->fail_trap_policer_counter_get);
 341	/* caution, dev_max_vfs write takes devlink lock */
 342	debugfs_create_file("max_vfs", 0600, nsim_dev->ddir,
 343			    nsim_dev, &nsim_dev_max_vfs_fops);
 344
 345	nsim_dev->nodes_ddir = debugfs_create_dir("rate_nodes", nsim_dev->ddir);
 346	if (IS_ERR(nsim_dev->nodes_ddir)) {
 347		err = PTR_ERR(nsim_dev->nodes_ddir);
 348		goto err_ports_ddir;
 349	}
 350	debugfs_create_bool("fail_trap_drop_counter_get", 0600,
 351			    nsim_dev->ddir,
 352			    &nsim_dev->fail_trap_drop_counter_get);
 353	nsim_udp_tunnels_debugfs_create(nsim_dev);
 354	return 0;
 355
 356err_ports_ddir:
 357	debugfs_remove_recursive(nsim_dev->ports_ddir);
 358err_ddir:
 359	debugfs_remove_recursive(nsim_dev->ddir);
 360	return err;
 361}
 362
 363static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev)
 364{
 365	debugfs_remove_recursive(nsim_dev->nodes_ddir);
 366	debugfs_remove_recursive(nsim_dev->ports_ddir);
 367	debugfs_remove_recursive(nsim_dev->ddir);
 368}
 369
 370static ssize_t nsim_dev_rate_parent_read(struct file *file,
 371					 char __user *data,
 372					 size_t count, loff_t *ppos)
 373{
 374	char **name_ptr = file->private_data;
 375	size_t len;
 376
 377	if (!*name_ptr)
 378		return 0;
 379
 380	len = strlen(*name_ptr);
 381	return simple_read_from_buffer(data, count, ppos, *name_ptr, len);
 382}
 383
 384static const struct file_operations nsim_dev_rate_parent_fops = {
 385	.open = simple_open,
 386	.read = nsim_dev_rate_parent_read,
 387	.llseek = generic_file_llseek,
 388	.owner = THIS_MODULE,
 389};
 390
 391static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev,
 392				      struct nsim_dev_port *nsim_dev_port)
 393{
 394	struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
 395	unsigned int port_index = nsim_dev_port->port_index;
 396	char port_ddir_name[16];
 397	char dev_link_name[32];
 398
 399	sprintf(port_ddir_name, "%u", port_index);
 400	nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name,
 401						 nsim_dev->ports_ddir);
 402	if (IS_ERR(nsim_dev_port->ddir))
 403		return PTR_ERR(nsim_dev_port->ddir);
 404
 405	sprintf(dev_link_name, "../../../" DRV_NAME "%u", nsim_bus_dev->dev.id);
 406	if (nsim_dev_port_is_vf(nsim_dev_port)) {
 407		unsigned int vf_id = nsim_dev_port_index_to_vf_index(port_index);
 408
 409		debugfs_create_u16("tx_share", 0400, nsim_dev_port->ddir,
 410				   &nsim_dev->vfconfigs[vf_id].min_tx_rate);
 411		debugfs_create_u16("tx_max", 0400, nsim_dev_port->ddir,
 412				   &nsim_dev->vfconfigs[vf_id].max_tx_rate);
 413		nsim_dev_port->rate_parent = debugfs_create_file("rate_parent",
 414								 0400,
 415								 nsim_dev_port->ddir,
 416								 &nsim_dev_port->parent_name,
 417								 &nsim_dev_rate_parent_fops);
 418	}
 419	debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name);
 420
 421	return 0;
 422}
 423
 424static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port)
 425{
 426	debugfs_remove_recursive(nsim_dev_port->ddir);
 427}
 428
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 429static int nsim_dev_resources_register(struct devlink *devlink)
 430{
 431	struct devlink_resource_size_params params = {
 432		.size_max = (u64)-1,
 433		.size_granularity = 1,
 434		.unit = DEVLINK_RESOURCE_UNIT_ENTRY
 435	};
 
 436	int err;
 
 437
 438	/* Resources for IPv4 */
 439	err = devl_resource_register(devlink, "IPv4", (u64)-1,
 440				     NSIM_RESOURCE_IPV4,
 441				     DEVLINK_RESOURCE_ID_PARENT_TOP,
 442				     &params);
 443	if (err) {
 444		pr_err("Failed to register IPv4 top resource\n");
 445		goto err_out;
 446	}
 447
 448	err = devl_resource_register(devlink, "fib", (u64)-1,
 449				     NSIM_RESOURCE_IPV4_FIB,
 450				     NSIM_RESOURCE_IPV4, &params);
 
 451	if (err) {
 452		pr_err("Failed to register IPv4 FIB resource\n");
 453		goto err_out;
 454	}
 455
 456	err = devl_resource_register(devlink, "fib-rules", (u64)-1,
 457				     NSIM_RESOURCE_IPV4_FIB_RULES,
 458				     NSIM_RESOURCE_IPV4, &params);
 
 459	if (err) {
 460		pr_err("Failed to register IPv4 FIB rules resource\n");
 461		goto err_out;
 462	}
 463
 464	/* Resources for IPv6 */
 465	err = devl_resource_register(devlink, "IPv6", (u64)-1,
 466				     NSIM_RESOURCE_IPV6,
 467				     DEVLINK_RESOURCE_ID_PARENT_TOP,
 468				     &params);
 469	if (err) {
 470		pr_err("Failed to register IPv6 top resource\n");
 471		goto err_out;
 472	}
 473
 474	err = devl_resource_register(devlink, "fib", (u64)-1,
 475				     NSIM_RESOURCE_IPV6_FIB,
 476				     NSIM_RESOURCE_IPV6, &params);
 
 477	if (err) {
 478		pr_err("Failed to register IPv6 FIB resource\n");
 479		goto err_out;
 480	}
 481
 482	err = devl_resource_register(devlink, "fib-rules", (u64)-1,
 483				     NSIM_RESOURCE_IPV6_FIB_RULES,
 484				     NSIM_RESOURCE_IPV6, &params);
 
 485	if (err) {
 486		pr_err("Failed to register IPv6 FIB rules resource\n");
 487		goto err_out;
 488	}
 489
 490	/* Resources for nexthops */
 491	err = devl_resource_register(devlink, "nexthops", (u64)-1,
 492				     NSIM_RESOURCE_NEXTHOPS,
 493				     DEVLINK_RESOURCE_ID_PARENT_TOP,
 494				     &params);
 495	if (err) {
 496		pr_err("Failed to register NEXTHOPS resource\n");
 497		goto err_out;
 498	}
 499	return 0;
 500
 501err_out:
 502	devl_resources_unregister(devlink);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 503	return err;
 504}
 505
 506enum nsim_devlink_param_id {
 507	NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
 508	NSIM_DEVLINK_PARAM_ID_TEST1,
 509};
 510
 511static const struct devlink_param nsim_devlink_params[] = {
 512	DEVLINK_PARAM_GENERIC(MAX_MACS,
 513			      BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
 514			      NULL, NULL, NULL),
 515	DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1,
 516			     "test1", DEVLINK_PARAM_TYPE_BOOL,
 517			     BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
 518			     NULL, NULL, NULL),
 519};
 520
 521static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev,
 522						struct devlink *devlink)
 523{
 524	union devlink_param_value value;
 525
 526	value.vu32 = nsim_dev->max_macs;
 527	devl_param_driverinit_value_set(devlink,
 528					DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
 529					value);
 530	value.vbool = nsim_dev->test1;
 531	devl_param_driverinit_value_set(devlink,
 532					NSIM_DEVLINK_PARAM_ID_TEST1,
 533					value);
 534}
 535
 536static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink)
 537{
 538	struct nsim_dev *nsim_dev = devlink_priv(devlink);
 539	union devlink_param_value saved_value;
 540	int err;
 541
 542	err = devl_param_driverinit_value_get(devlink,
 543					      DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
 544					      &saved_value);
 545	if (!err)
 546		nsim_dev->max_macs = saved_value.vu32;
 547	err = devl_param_driverinit_value_get(devlink,
 548					      NSIM_DEVLINK_PARAM_ID_TEST1,
 549					      &saved_value);
 550	if (!err)
 551		nsim_dev->test1 = saved_value.vbool;
 552}
 553
 554#define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16
 555
 556static const struct devlink_region_ops dummy_region_ops = {
 557	.name = "dummy",
 558	.destructor = &kfree,
 559	.snapshot = nsim_dev_take_snapshot,
 560};
 561
 562static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev,
 563				      struct devlink *devlink)
 564{
 565	nsim_dev->dummy_region =
 566		devl_region_create(devlink, &dummy_region_ops,
 567				   NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX,
 568				   NSIM_DEV_DUMMY_REGION_SIZE);
 569	return PTR_ERR_OR_ZERO(nsim_dev->dummy_region);
 570}
 571
 572static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev)
 573{
 574	devl_region_destroy(nsim_dev->dummy_region);
 575}
 576
 577static int
 578__nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
 579		    unsigned int port_index);
 580static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port);
 581
 582static int nsim_esw_legacy_enable(struct nsim_dev *nsim_dev,
 583				  struct netlink_ext_ack *extack)
 584{
 585	struct devlink *devlink = priv_to_devlink(nsim_dev);
 586	struct nsim_dev_port *nsim_dev_port, *tmp;
 587
 588	devl_rate_nodes_destroy(devlink);
 589	list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list)
 590		if (nsim_dev_port_is_vf(nsim_dev_port))
 591			__nsim_dev_port_del(nsim_dev_port);
 592	nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY;
 593	return 0;
 594}
 595
 596static int nsim_esw_switchdev_enable(struct nsim_dev *nsim_dev,
 597				     struct netlink_ext_ack *extack)
 598{
 599	struct nsim_dev_port *nsim_dev_port, *tmp;
 600	int i, err;
 601
 602	for (i = 0; i < nsim_dev_get_vfs(nsim_dev); i++) {
 603		err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_VF, i);
 604		if (err) {
 605			NL_SET_ERR_MSG_MOD(extack, "Failed to initialize VFs' netdevsim ports");
 606			pr_err("Failed to initialize VF id=%d. %d.\n", i, err);
 607			goto err_port_add_vfs;
 608		}
 609	}
 610	nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV;
 611	return 0;
 612
 613err_port_add_vfs:
 614	list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list)
 615		if (nsim_dev_port_is_vf(nsim_dev_port))
 616			__nsim_dev_port_del(nsim_dev_port);
 617	return err;
 618}
 619
 620static int nsim_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode,
 621					 struct netlink_ext_ack *extack)
 622{
 623	struct nsim_dev *nsim_dev = devlink_priv(devlink);
 624
 625	if (mode == nsim_dev->esw_mode)
 626		return 0;
 627
 628	if (mode == DEVLINK_ESWITCH_MODE_LEGACY)
 629		return nsim_esw_legacy_enable(nsim_dev, extack);
 630	if (mode == DEVLINK_ESWITCH_MODE_SWITCHDEV)
 631		return nsim_esw_switchdev_enable(nsim_dev, extack);
 632
 633	return -EINVAL;
 634}
 635
 636static int nsim_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
 637{
 638	struct nsim_dev *nsim_dev = devlink_priv(devlink);
 639
 640	*mode = nsim_dev->esw_mode;
 641	return 0;
 642}
 643
 644struct nsim_trap_item {
 645	void *trap_ctx;
 646	enum devlink_trap_action action;
 647};
 648
 649struct nsim_trap_data {
 650	struct delayed_work trap_report_dw;
 651	struct nsim_trap_item *trap_items_arr;
 652	u64 *trap_policers_cnt_arr;
 653	u64 trap_pkt_cnt;
 654	struct nsim_dev *nsim_dev;
 655	spinlock_t trap_lock;	/* Protects trap_items_arr */
 656};
 657
 658/* All driver-specific traps must be documented in
 659 * Documentation/networking/devlink/netdevsim.rst
 660 */
 661enum {
 662	NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX,
 663	NSIM_TRAP_ID_FID_MISS,
 664};
 665
 666#define NSIM_TRAP_NAME_FID_MISS "fid_miss"
 667
 668#define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT
 669
 670#define NSIM_TRAP_DROP(_id, _group_id)					      \
 671	DEVLINK_TRAP_GENERIC(DROP, DROP, _id,				      \
 672			     DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id,	      \
 673			     NSIM_TRAP_METADATA)
 674#define NSIM_TRAP_DROP_EXT(_id, _group_id, _metadata)			      \
 675	DEVLINK_TRAP_GENERIC(DROP, DROP, _id,				      \
 676			     DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id,	      \
 677			     NSIM_TRAP_METADATA | (_metadata))
 678#define NSIM_TRAP_EXCEPTION(_id, _group_id)				      \
 679	DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id,			      \
 680			     DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id,	      \
 681			     NSIM_TRAP_METADATA)
 682#define NSIM_TRAP_CONTROL(_id, _group_id, _action)			      \
 683	DEVLINK_TRAP_GENERIC(CONTROL, _action, _id,			      \
 684			     DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id,	      \
 685			     NSIM_TRAP_METADATA)
 686#define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id)			      \
 687	DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id,	      \
 688			    NSIM_TRAP_NAME_##_id,			      \
 689			    DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id,	      \
 690			    NSIM_TRAP_METADATA)
 691
 692#define NSIM_DEV_TRAP_POLICER_MIN_RATE	1
 693#define NSIM_DEV_TRAP_POLICER_MAX_RATE	8000
 694#define NSIM_DEV_TRAP_POLICER_MIN_BURST	8
 695#define NSIM_DEV_TRAP_POLICER_MAX_BURST	65536
 696
 697#define NSIM_TRAP_POLICER(_id, _rate, _burst)				      \
 698	DEVLINK_TRAP_POLICER(_id, _rate, _burst,			      \
 699			     NSIM_DEV_TRAP_POLICER_MAX_RATE,		      \
 700			     NSIM_DEV_TRAP_POLICER_MIN_RATE,		      \
 701			     NSIM_DEV_TRAP_POLICER_MAX_BURST,		      \
 702			     NSIM_DEV_TRAP_POLICER_MIN_BURST)
 703
 704static const struct devlink_trap_policer nsim_trap_policers_arr[] = {
 705	NSIM_TRAP_POLICER(1, 1000, 128),
 706	NSIM_TRAP_POLICER(2, 2000, 256),
 707	NSIM_TRAP_POLICER(3, 3000, 512),
 708};
 709
 710static const struct devlink_trap_group nsim_trap_groups_arr[] = {
 711	DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 0),
 712	DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1),
 713	DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1),
 714	DEVLINK_TRAP_GROUP_GENERIC(BUFFER_DROPS, 2),
 715	DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 3),
 716	DEVLINK_TRAP_GROUP_GENERIC(MC_SNOOPING, 3),
 717};
 718
 719static const struct devlink_trap nsim_traps_arr[] = {
 720	NSIM_TRAP_DROP(SMAC_MC, L2_DROPS),
 721	NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS),
 722	NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS),
 723	NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS),
 724	NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS),
 725	NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS),
 726	NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS),
 727	NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS),
 728	NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_EXCEPTIONS),
 729	NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS),
 730	NSIM_TRAP_DROP_EXT(INGRESS_FLOW_ACTION_DROP, ACL_DROPS,
 731			   DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
 732	NSIM_TRAP_DROP_EXT(EGRESS_FLOW_ACTION_DROP, ACL_DROPS,
 733			   DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
 734	NSIM_TRAP_CONTROL(IGMP_QUERY, MC_SNOOPING, MIRROR),
 735	NSIM_TRAP_CONTROL(IGMP_V1_REPORT, MC_SNOOPING, TRAP),
 736};
 737
 738#define NSIM_TRAP_L4_DATA_LEN 100
 739
 740static struct sk_buff *nsim_dev_trap_skb_build(void)
 741{
 742	int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN;
 743	struct sk_buff *skb;
 744	struct udphdr *udph;
 745	struct ethhdr *eth;
 746	struct iphdr *iph;
 747
 748	skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
 749	if (!skb)
 750		return NULL;
 751	tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len;
 752
 753	skb_reset_mac_header(skb);
 754	eth = skb_put(skb, sizeof(struct ethhdr));
 755	eth_random_addr(eth->h_dest);
 756	eth_random_addr(eth->h_source);
 757	eth->h_proto = htons(ETH_P_IP);
 758	skb->protocol = htons(ETH_P_IP);
 759
 760	skb_set_network_header(skb, skb->len);
 761	iph = skb_put(skb, sizeof(struct iphdr));
 762	iph->protocol = IPPROTO_UDP;
 763	iph->saddr = in_aton("192.0.2.1");
 764	iph->daddr = in_aton("198.51.100.1");
 765	iph->version = 0x4;
 766	iph->frag_off = 0;
 767	iph->ihl = 0x5;
 768	iph->tot_len = htons(tot_len);
 769	iph->ttl = 100;
 770	iph->check = 0;
 771	iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
 772
 773	skb_set_transport_header(skb, skb->len);
 774	udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len);
 775	get_random_bytes(&udph->source, sizeof(u16));
 776	get_random_bytes(&udph->dest, sizeof(u16));
 777	udph->len = htons(sizeof(struct udphdr) + data_len);
 778
 779	return skb;
 780}
 781
 782static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port)
 783{
 784	struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
 785	struct devlink *devlink = priv_to_devlink(nsim_dev);
 786	struct nsim_trap_data *nsim_trap_data;
 787	int i;
 788
 789	nsim_trap_data = nsim_dev->trap_data;
 790
 791	spin_lock(&nsim_trap_data->trap_lock);
 792	for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
 793		struct flow_action_cookie *fa_cookie = NULL;
 794		struct nsim_trap_item *nsim_trap_item;
 795		struct sk_buff *skb;
 796		bool has_fa_cookie;
 797
 798		has_fa_cookie = nsim_traps_arr[i].metadata_cap &
 799				DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE;
 800
 801		nsim_trap_item = &nsim_trap_data->trap_items_arr[i];
 802		if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP)
 803			continue;
 804
 805		skb = nsim_dev_trap_skb_build();
 806		if (!skb)
 807			continue;
 808		skb->dev = nsim_dev_port->ns->netdev;
 809
 810		/* Trapped packets are usually passed to devlink in softIRQ,
 811		 * but in this case they are generated in a workqueue. Disable
 812		 * softIRQs to prevent lockdep from complaining about
 813		 * "incosistent lock state".
 814		 */
 815
 816		spin_lock_bh(&nsim_dev->fa_cookie_lock);
 817		fa_cookie = has_fa_cookie ? nsim_dev->fa_cookie : NULL;
 818		devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx,
 819				    &nsim_dev_port->devlink_port, fa_cookie);
 820		spin_unlock_bh(&nsim_dev->fa_cookie_lock);
 821		consume_skb(skb);
 822	}
 823	spin_unlock(&nsim_trap_data->trap_lock);
 824}
 825
 826#define NSIM_TRAP_REPORT_INTERVAL_MS	100
 827
 828static void nsim_dev_trap_report_work(struct work_struct *work)
 829{
 830	struct nsim_trap_data *nsim_trap_data;
 831	struct nsim_dev_port *nsim_dev_port;
 832	struct nsim_dev *nsim_dev;
 833
 834	nsim_trap_data = container_of(work, struct nsim_trap_data,
 835				      trap_report_dw.work);
 836	nsim_dev = nsim_trap_data->nsim_dev;
 837
 838	if (!devl_trylock(priv_to_devlink(nsim_dev))) {
 839		schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw, 1);
 840		return;
 841	}
 842
 843	/* For each running port and enabled packet trap, generate a UDP
 844	 * packet with a random 5-tuple and report it.
 845	 */
 
 846	list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) {
 847		if (!netif_running(nsim_dev_port->ns->netdev))
 848			continue;
 849
 850		nsim_dev_trap_report(nsim_dev_port);
 851	}
 852	devl_unlock(priv_to_devlink(nsim_dev));
 853
 854	schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
 855			      msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
 856}
 857
 858static int nsim_dev_traps_init(struct devlink *devlink)
 859{
 860	size_t policers_count = ARRAY_SIZE(nsim_trap_policers_arr);
 861	struct nsim_dev *nsim_dev = devlink_priv(devlink);
 862	struct nsim_trap_data *nsim_trap_data;
 863	int err;
 864
 865	nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL);
 866	if (!nsim_trap_data)
 867		return -ENOMEM;
 868
 869	nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr),
 870						 sizeof(struct nsim_trap_item),
 871						 GFP_KERNEL);
 872	if (!nsim_trap_data->trap_items_arr) {
 873		err = -ENOMEM;
 874		goto err_trap_data_free;
 875	}
 876
 877	nsim_trap_data->trap_policers_cnt_arr = kcalloc(policers_count,
 878							sizeof(u64),
 879							GFP_KERNEL);
 880	if (!nsim_trap_data->trap_policers_cnt_arr) {
 881		err = -ENOMEM;
 882		goto err_trap_items_free;
 883	}
 884
 885	/* The lock is used to protect the action state of the registered
 886	 * traps. The value is written by user and read in delayed work when
 887	 * iterating over all the traps.
 888	 */
 889	spin_lock_init(&nsim_trap_data->trap_lock);
 890	nsim_trap_data->nsim_dev = nsim_dev;
 891	nsim_dev->trap_data = nsim_trap_data;
 892
 893	err = devl_trap_policers_register(devlink, nsim_trap_policers_arr,
 894					  policers_count);
 895	if (err)
 896		goto err_trap_policers_cnt_free;
 897
 898	err = devl_trap_groups_register(devlink, nsim_trap_groups_arr,
 899					ARRAY_SIZE(nsim_trap_groups_arr));
 900	if (err)
 901		goto err_trap_policers_unregister;
 902
 903	err = devl_traps_register(devlink, nsim_traps_arr,
 904				  ARRAY_SIZE(nsim_traps_arr), NULL);
 905	if (err)
 906		goto err_trap_groups_unregister;
 907
 908	INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw,
 909			  nsim_dev_trap_report_work);
 910	schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
 911			      msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
 912
 913	return 0;
 914
 915err_trap_groups_unregister:
 916	devl_trap_groups_unregister(devlink, nsim_trap_groups_arr,
 917				    ARRAY_SIZE(nsim_trap_groups_arr));
 918err_trap_policers_unregister:
 919	devl_trap_policers_unregister(devlink, nsim_trap_policers_arr,
 920				      ARRAY_SIZE(nsim_trap_policers_arr));
 921err_trap_policers_cnt_free:
 922	kfree(nsim_trap_data->trap_policers_cnt_arr);
 923err_trap_items_free:
 924	kfree(nsim_trap_data->trap_items_arr);
 925err_trap_data_free:
 926	kfree(nsim_trap_data);
 927	return err;
 928}
 929
 930static void nsim_dev_traps_exit(struct devlink *devlink)
 931{
 932	struct nsim_dev *nsim_dev = devlink_priv(devlink);
 933
 934	/* caution, trap work takes devlink lock */
 935	cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw);
 936	devl_traps_unregister(devlink, nsim_traps_arr,
 937			      ARRAY_SIZE(nsim_traps_arr));
 938	devl_trap_groups_unregister(devlink, nsim_trap_groups_arr,
 939				    ARRAY_SIZE(nsim_trap_groups_arr));
 940	devl_trap_policers_unregister(devlink, nsim_trap_policers_arr,
 941				      ARRAY_SIZE(nsim_trap_policers_arr));
 942	kfree(nsim_dev->trap_data->trap_policers_cnt_arr);
 943	kfree(nsim_dev->trap_data->trap_items_arr);
 944	kfree(nsim_dev->trap_data);
 945}
 946
 947static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
 948				  struct netlink_ext_ack *extack);
 949static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev);
 950
 951static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change,
 952				enum devlink_reload_action action, enum devlink_reload_limit limit,
 953				struct netlink_ext_ack *extack)
 954{
 955	struct nsim_dev *nsim_dev = devlink_priv(devlink);
 956
 957	if (nsim_dev->dont_allow_reload) {
 958		/* For testing purposes, user set debugfs dont_allow_reload
 959		 * value to true. So forbid it.
 960		 */
 961		NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes");
 962		return -EOPNOTSUPP;
 963	}
 964
 965	nsim_dev_reload_destroy(nsim_dev);
 966	return 0;
 967}
 968
 969static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_action action,
 970			      enum devlink_reload_limit limit, u32 *actions_performed,
 971			      struct netlink_ext_ack *extack)
 972{
 973	struct nsim_dev *nsim_dev = devlink_priv(devlink);
 
 
 
 
 
 974
 975	if (nsim_dev->fail_reload) {
 976		/* For testing purposes, user set debugfs fail_reload
 977		 * value to true. Fail right away.
 978		 */
 979		NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes");
 980		return -EINVAL;
 
 
 
 
 981	}
 
 982
 983	*actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT);
 984
 985	return nsim_dev_reload_create(nsim_dev, extack);
 986}
 987
 988static int nsim_dev_info_get(struct devlink *devlink,
 989			     struct devlink_info_req *req,
 990			     struct netlink_ext_ack *extack)
 991{
 992	int err;
 993
 994	err = devlink_info_version_stored_put_ext(req, "fw.mgmt", "10.20.30",
 995						  DEVLINK_INFO_VERSION_TYPE_COMPONENT);
 996	if (err)
 997		return err;
 998	return devlink_info_version_running_put_ext(req, "fw.mgmt", "10.20.30",
 999						    DEVLINK_INFO_VERSION_TYPE_COMPONENT);
1000}
1001
1002#define NSIM_DEV_FLASH_SIZE 500000
1003#define NSIM_DEV_FLASH_CHUNK_SIZE 1000
1004#define NSIM_DEV_FLASH_CHUNK_TIME_MS 10
1005
1006static int nsim_dev_flash_update(struct devlink *devlink,
1007				 struct devlink_flash_update_params *params,
1008				 struct netlink_ext_ack *extack)
1009{
1010	struct nsim_dev *nsim_dev = devlink_priv(devlink);
1011	int i;
1012
1013	if ((params->overwrite_mask & ~nsim_dev->fw_update_overwrite_mask) != 0)
1014		return -EOPNOTSUPP;
1015
1016	if (nsim_dev->fw_update_status) {
 
1017		devlink_flash_update_status_notify(devlink,
1018						   "Preparing to flash",
1019						   params->component, 0, 0);
1020	}
1021
1022	for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) {
1023		if (nsim_dev->fw_update_status)
1024			devlink_flash_update_status_notify(devlink, "Flashing",
1025							   params->component,
1026							   i * NSIM_DEV_FLASH_CHUNK_SIZE,
1027							   NSIM_DEV_FLASH_SIZE);
1028		msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS);
1029	}
1030
1031	if (nsim_dev->fw_update_status) {
1032		devlink_flash_update_status_notify(devlink, "Flashing",
1033						   params->component,
1034						   NSIM_DEV_FLASH_SIZE,
1035						   NSIM_DEV_FLASH_SIZE);
1036		devlink_flash_update_timeout_notify(devlink, "Flash select",
1037						    params->component, 81);
1038		devlink_flash_update_status_notify(devlink, "Flashing done",
1039						   params->component, 0, 0);
 
1040	}
1041
1042	return 0;
1043}
1044
1045static struct nsim_trap_item *
1046nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id)
1047{
1048	struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data;
1049	int i;
1050
1051	for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
1052		if (nsim_traps_arr[i].id == trap_id)
1053			return &nsim_trap_data->trap_items_arr[i];
1054	}
1055
1056	return NULL;
1057}
1058
1059static int nsim_dev_devlink_trap_init(struct devlink *devlink,
1060				      const struct devlink_trap *trap,
1061				      void *trap_ctx)
1062{
1063	struct nsim_dev *nsim_dev = devlink_priv(devlink);
1064	struct nsim_trap_item *nsim_trap_item;
1065
1066	nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
1067	if (WARN_ON(!nsim_trap_item))
1068		return -ENOENT;
1069
1070	nsim_trap_item->trap_ctx = trap_ctx;
1071	nsim_trap_item->action = trap->init_action;
1072
1073	return 0;
1074}
1075
1076static int
1077nsim_dev_devlink_trap_action_set(struct devlink *devlink,
1078				 const struct devlink_trap *trap,
1079				 enum devlink_trap_action action,
1080				 struct netlink_ext_ack *extack)
1081{
1082	struct nsim_dev *nsim_dev = devlink_priv(devlink);
1083	struct nsim_trap_item *nsim_trap_item;
1084
1085	nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
1086	if (WARN_ON(!nsim_trap_item))
1087		return -ENOENT;
1088
1089	spin_lock(&nsim_dev->trap_data->trap_lock);
1090	nsim_trap_item->action = action;
1091	spin_unlock(&nsim_dev->trap_data->trap_lock);
1092
1093	return 0;
1094}
1095
1096static int
1097nsim_dev_devlink_trap_group_set(struct devlink *devlink,
1098				const struct devlink_trap_group *group,
1099				const struct devlink_trap_policer *policer,
1100				struct netlink_ext_ack *extack)
1101{
1102	struct nsim_dev *nsim_dev = devlink_priv(devlink);
1103
1104	if (nsim_dev->fail_trap_group_set)
1105		return -EINVAL;
1106
1107	return 0;
1108}
1109
1110static int
1111nsim_dev_devlink_trap_policer_set(struct devlink *devlink,
1112				  const struct devlink_trap_policer *policer,
1113				  u64 rate, u64 burst,
1114				  struct netlink_ext_ack *extack)
1115{
1116	struct nsim_dev *nsim_dev = devlink_priv(devlink);
1117
1118	if (nsim_dev->fail_trap_policer_set) {
1119		NL_SET_ERR_MSG_MOD(extack, "User setup the operation to fail for testing purposes");
1120		return -EINVAL;
1121	}
1122
1123	return 0;
1124}
1125
1126static int
1127nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink,
1128					  const struct devlink_trap_policer *policer,
1129					  u64 *p_drops)
1130{
1131	struct nsim_dev *nsim_dev = devlink_priv(devlink);
1132	u64 *cnt;
1133
1134	if (nsim_dev->fail_trap_policer_counter_get)
1135		return -EINVAL;
1136
1137	cnt = &nsim_dev->trap_data->trap_policers_cnt_arr[policer->id - 1];
1138	*p_drops = (*cnt)++;
1139
1140	return 0;
1141}
1142
1143#define NSIM_LINK_SPEED_MAX     5000 /* Mbps */
1144#define NSIM_LINK_SPEED_UNIT    125000 /* 1 Mbps given in bytes/sec to avoid
1145					* u64 overflow during conversion from
1146					* bytes to bits.
1147					*/
1148
1149static int nsim_rate_bytes_to_units(char *name, u64 *rate, struct netlink_ext_ack *extack)
1150{
1151	u64 val;
1152	u32 rem;
1153
1154	val = div_u64_rem(*rate, NSIM_LINK_SPEED_UNIT, &rem);
1155	if (rem) {
1156		pr_err("%s rate value %lluBps not in link speed units of 1Mbps.\n",
1157		       name, *rate);
1158		NL_SET_ERR_MSG_MOD(extack, "TX rate value not in link speed units of 1Mbps.");
1159		return -EINVAL;
1160	}
1161
1162	if (val > NSIM_LINK_SPEED_MAX) {
1163		pr_err("%s rate value %lluMbps exceed link maximum speed 5000Mbps.\n",
1164		       name, val);
1165		NL_SET_ERR_MSG_MOD(extack, "TX rate value exceed link maximum speed 5000Mbps.");
1166		return -EINVAL;
1167	}
1168	*rate = val;
1169	return 0;
1170}
1171
1172static int nsim_leaf_tx_share_set(struct devlink_rate *devlink_rate, void *priv,
1173				  u64 tx_share, struct netlink_ext_ack *extack)
1174{
1175	struct nsim_dev_port *nsim_dev_port = priv;
1176	struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
1177	int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index);
1178	int err;
1179
1180	err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack);
1181	if (err)
1182		return err;
1183
1184	nsim_dev->vfconfigs[vf_id].min_tx_rate = tx_share;
1185	return 0;
1186}
1187
1188static int nsim_leaf_tx_max_set(struct devlink_rate *devlink_rate, void *priv,
1189				u64 tx_max, struct netlink_ext_ack *extack)
1190{
1191	struct nsim_dev_port *nsim_dev_port = priv;
1192	struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
1193	int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index);
1194	int err;
1195
1196	err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack);
1197	if (err)
1198		return err;
1199
1200	nsim_dev->vfconfigs[vf_id].max_tx_rate = tx_max;
1201	return 0;
1202}
1203
1204struct nsim_rate_node {
1205	struct dentry *ddir;
1206	struct dentry *rate_parent;
1207	char *parent_name;
1208	u16 tx_share;
1209	u16 tx_max;
1210};
1211
1212static int nsim_node_tx_share_set(struct devlink_rate *devlink_rate, void *priv,
1213				  u64 tx_share, struct netlink_ext_ack *extack)
1214{
1215	struct nsim_rate_node *nsim_node = priv;
1216	int err;
1217
1218	err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack);
1219	if (err)
1220		return err;
1221
1222	nsim_node->tx_share = tx_share;
1223	return 0;
1224}
1225
1226static int nsim_node_tx_max_set(struct devlink_rate *devlink_rate, void *priv,
1227				u64 tx_max, struct netlink_ext_ack *extack)
1228{
1229	struct nsim_rate_node *nsim_node = priv;
1230	int err;
1231
1232	err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack);
 
1233	if (err)
1234		return err;
1235
1236	nsim_node->tx_max = tx_max;
1237	return 0;
1238}
1239
1240static int nsim_rate_node_new(struct devlink_rate *node, void **priv,
1241			      struct netlink_ext_ack *extack)
1242{
1243	struct nsim_dev *nsim_dev = devlink_priv(node->devlink);
1244	struct nsim_rate_node *nsim_node;
1245
1246	if (!nsim_esw_mode_is_switchdev(nsim_dev)) {
1247		NL_SET_ERR_MSG_MOD(extack, "Node creation allowed only in switchdev mode.");
1248		return -EOPNOTSUPP;
1249	}
1250
1251	nsim_node = kzalloc(sizeof(*nsim_node), GFP_KERNEL);
1252	if (!nsim_node)
1253		return -ENOMEM;
1254
1255	nsim_node->ddir = debugfs_create_dir(node->name, nsim_dev->nodes_ddir);
1256
1257	debugfs_create_u16("tx_share", 0400, nsim_node->ddir, &nsim_node->tx_share);
1258	debugfs_create_u16("tx_max", 0400, nsim_node->ddir, &nsim_node->tx_max);
1259	nsim_node->rate_parent = debugfs_create_file("rate_parent", 0400,
1260						     nsim_node->ddir,
1261						     &nsim_node->parent_name,
1262						     &nsim_dev_rate_parent_fops);
1263
1264	*priv = nsim_node;
1265	return 0;
1266}
1267
1268static int nsim_rate_node_del(struct devlink_rate *node, void *priv,
1269			      struct netlink_ext_ack *extack)
1270{
1271	struct nsim_rate_node *nsim_node = priv;
1272
1273	debugfs_remove(nsim_node->rate_parent);
1274	debugfs_remove_recursive(nsim_node->ddir);
1275	kfree(nsim_node);
1276	return 0;
1277}
1278
1279static int nsim_rate_leaf_parent_set(struct devlink_rate *child,
1280				     struct devlink_rate *parent,
1281				     void *priv_child, void *priv_parent,
1282				     struct netlink_ext_ack *extack)
1283{
1284	struct nsim_dev_port *nsim_dev_port = priv_child;
1285
1286	if (parent)
1287		nsim_dev_port->parent_name = parent->name;
1288	else
1289		nsim_dev_port->parent_name = NULL;
1290	return 0;
1291}
1292
1293static int nsim_rate_node_parent_set(struct devlink_rate *child,
1294				     struct devlink_rate *parent,
1295				     void *priv_child, void *priv_parent,
1296				     struct netlink_ext_ack *extack)
1297{
1298	struct nsim_rate_node *nsim_node = priv_child;
1299
1300	if (parent)
1301		nsim_node->parent_name = parent->name;
1302	else
1303		nsim_node->parent_name = NULL;
1304	return 0;
 
 
 
 
 
 
 
 
 
 
 
1305}
1306
1307static int
1308nsim_dev_devlink_trap_drop_counter_get(struct devlink *devlink,
1309				       const struct devlink_trap *trap,
1310				       u64 *p_drops)
1311{
1312	struct nsim_dev *nsim_dev = devlink_priv(devlink);
1313	u64 *cnt;
1314
1315	if (nsim_dev->fail_trap_drop_counter_get)
1316		return -EINVAL;
1317
1318	cnt = &nsim_dev->trap_data->trap_pkt_cnt;
1319	*p_drops = (*cnt)++;
1320
1321	return 0;
 
 
 
 
 
 
 
 
 
 
1322}
1323
1324static const struct devlink_ops nsim_dev_devlink_ops = {
1325	.eswitch_mode_set = nsim_devlink_eswitch_mode_set,
1326	.eswitch_mode_get = nsim_devlink_eswitch_mode_get,
1327	.supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK,
1328	.reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT),
1329	.reload_down = nsim_dev_reload_down,
1330	.reload_up = nsim_dev_reload_up,
1331	.info_get = nsim_dev_info_get,
1332	.flash_update = nsim_dev_flash_update,
1333	.trap_init = nsim_dev_devlink_trap_init,
1334	.trap_action_set = nsim_dev_devlink_trap_action_set,
1335	.trap_group_set = nsim_dev_devlink_trap_group_set,
1336	.trap_policer_set = nsim_dev_devlink_trap_policer_set,
1337	.trap_policer_counter_get = nsim_dev_devlink_trap_policer_counter_get,
1338	.rate_leaf_tx_share_set = nsim_leaf_tx_share_set,
1339	.rate_leaf_tx_max_set = nsim_leaf_tx_max_set,
1340	.rate_node_tx_share_set = nsim_node_tx_share_set,
1341	.rate_node_tx_max_set = nsim_node_tx_max_set,
1342	.rate_node_new = nsim_rate_node_new,
1343	.rate_node_del = nsim_rate_node_del,
1344	.rate_leaf_parent_set = nsim_rate_leaf_parent_set,
1345	.rate_node_parent_set = nsim_rate_node_parent_set,
1346	.trap_drop_counter_get = nsim_dev_devlink_trap_drop_counter_get,
1347};
1348
1349#define NSIM_DEV_MAX_MACS_DEFAULT 32
1350#define NSIM_DEV_TEST1_DEFAULT true
1351
1352static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
1353			       unsigned int port_index)
1354{
1355	struct devlink_port_attrs attrs = {};
1356	struct nsim_dev_port *nsim_dev_port;
1357	struct devlink_port *devlink_port;
1358	int err;
1359
1360	if (type == NSIM_DEV_PORT_TYPE_VF && !nsim_dev_get_vfs(nsim_dev))
1361		return -EINVAL;
1362
1363	nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL);
1364	if (!nsim_dev_port)
1365		return -ENOMEM;
1366	nsim_dev_port->port_index = nsim_dev_port_index(type, port_index);
1367	nsim_dev_port->port_type = type;
1368
1369	devlink_port = &nsim_dev_port->devlink_port;
1370	if (nsim_dev_port_is_pf(nsim_dev_port)) {
1371		attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
1372		attrs.phys.port_number = port_index + 1;
1373	} else {
1374		attrs.flavour = DEVLINK_PORT_FLAVOUR_PCI_VF;
1375		attrs.pci_vf.pf = 0;
1376		attrs.pci_vf.vf = port_index;
1377	}
1378	memcpy(attrs.switch_id.id, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
1379	attrs.switch_id.id_len = nsim_dev->switch_id.id_len;
1380	devlink_port_attrs_set(devlink_port, &attrs);
1381	err = devl_port_register(priv_to_devlink(nsim_dev), devlink_port,
1382				 nsim_dev_port->port_index);
1383	if (err)
1384		goto err_port_free;
1385
1386	err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port);
1387	if (err)
1388		goto err_dl_port_unregister;
1389
1390	nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port);
1391	if (IS_ERR(nsim_dev_port->ns)) {
1392		err = PTR_ERR(nsim_dev_port->ns);
1393		goto err_port_debugfs_exit;
1394	}
1395
1396	if (nsim_dev_port_is_vf(nsim_dev_port)) {
1397		err = devl_rate_leaf_create(&nsim_dev_port->devlink_port,
1398					    nsim_dev_port, NULL);
1399		if (err)
1400			goto err_nsim_destroy;
1401	}
1402
1403	list_add(&nsim_dev_port->list, &nsim_dev->port_list);
1404
1405	return 0;
1406
1407err_nsim_destroy:
1408	nsim_destroy(nsim_dev_port->ns);
1409err_port_debugfs_exit:
1410	nsim_dev_port_debugfs_exit(nsim_dev_port);
1411err_dl_port_unregister:
1412	devl_port_unregister(devlink_port);
1413err_port_free:
1414	kfree(nsim_dev_port);
1415	return err;
1416}
1417
1418static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port)
1419{
1420	struct devlink_port *devlink_port = &nsim_dev_port->devlink_port;
1421
1422	list_del(&nsim_dev_port->list);
1423	if (nsim_dev_port_is_vf(nsim_dev_port))
1424		devl_rate_leaf_destroy(&nsim_dev_port->devlink_port);
1425	nsim_destroy(nsim_dev_port->ns);
1426	nsim_dev_port_debugfs_exit(nsim_dev_port);
1427	devl_port_unregister(devlink_port);
1428	kfree(nsim_dev_port);
1429}
1430
1431static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev)
1432{
1433	struct nsim_dev_port *nsim_dev_port, *tmp;
1434
 
1435	list_for_each_entry_safe(nsim_dev_port, tmp,
1436				 &nsim_dev->port_list, list)
1437		__nsim_dev_port_del(nsim_dev_port);
 
1438}
1439
1440static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev,
1441				 unsigned int port_count)
1442{
1443	int i, err;
1444
1445	for (i = 0; i < port_count; i++) {
1446		err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_PF, i);
1447		if (err)
1448			goto err_port_del_all;
1449	}
1450	return 0;
1451
1452err_port_del_all:
1453	nsim_dev_port_del_all(nsim_dev);
1454	return err;
1455}
1456
1457static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
1458				  struct netlink_ext_ack *extack)
1459{
1460	struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
1461	struct devlink *devlink;
1462	int err;
1463
1464	devlink = priv_to_devlink(nsim_dev);
1465	nsim_dev = devlink_priv(devlink);
1466	INIT_LIST_HEAD(&nsim_dev->port_list);
1467	nsim_dev->fw_update_status = true;
1468	nsim_dev->fw_update_overwrite_mask = 0;
1469
1470	nsim_devlink_param_load_driverinit_values(devlink);
1471
1472	err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1473	if (err)
1474		return err;
1475
1476	err = nsim_dev_traps_init(devlink);
1477	if (err)
1478		goto err_dummy_region_exit;
1479
1480	nsim_dev->fib_data = nsim_fib_create(devlink, extack);
1481	if (IS_ERR(nsim_dev->fib_data)) {
1482		err = PTR_ERR(nsim_dev->fib_data);
1483		goto err_traps_exit;
1484	}
1485
1486	err = nsim_dev_health_init(nsim_dev, devlink);
1487	if (err)
1488		goto err_fib_destroy;
1489
1490	err = nsim_dev_psample_init(nsim_dev);
1491	if (err)
1492		goto err_health_exit;
1493
1494	err = nsim_dev_hwstats_init(nsim_dev);
1495	if (err)
1496		goto err_psample_exit;
1497
1498	err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
1499	if (err)
1500		goto err_hwstats_exit;
1501
1502	nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
1503						      0200,
1504						      nsim_dev->ddir,
1505						      nsim_dev,
1506						&nsim_dev_take_snapshot_fops);
1507	return 0;
1508
1509err_hwstats_exit:
1510	nsim_dev_hwstats_exit(nsim_dev);
1511err_psample_exit:
1512	nsim_dev_psample_exit(nsim_dev);
1513err_health_exit:
1514	nsim_dev_health_exit(nsim_dev);
1515err_fib_destroy:
1516	nsim_fib_destroy(devlink, nsim_dev->fib_data);
1517err_traps_exit:
1518	nsim_dev_traps_exit(devlink);
1519err_dummy_region_exit:
1520	nsim_dev_dummy_region_exit(nsim_dev);
1521	return err;
1522}
1523
1524int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev)
1525{
1526	struct nsim_dev *nsim_dev;
1527	struct devlink *devlink;
1528	int err;
1529
1530	devlink = devlink_alloc_ns(&nsim_dev_devlink_ops, sizeof(*nsim_dev),
1531				 nsim_bus_dev->initial_net, &nsim_bus_dev->dev);
1532	if (!devlink)
1533		return -ENOMEM;
1534	devl_lock(devlink);
1535	nsim_dev = devlink_priv(devlink);
1536	nsim_dev->nsim_bus_dev = nsim_bus_dev;
1537	nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id);
1538	get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
1539	INIT_LIST_HEAD(&nsim_dev->port_list);
1540	nsim_dev->fw_update_status = true;
1541	nsim_dev->fw_update_overwrite_mask = 0;
1542	nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT;
1543	nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT;
1544	spin_lock_init(&nsim_dev->fa_cookie_lock);
1545
1546	dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev);
1547
1548	nsim_dev->vfconfigs = kcalloc(nsim_bus_dev->max_vfs,
1549				      sizeof(struct nsim_vf_config),
1550				      GFP_KERNEL | __GFP_NOWARN);
1551	if (!nsim_dev->vfconfigs) {
1552		err = -ENOMEM;
1553		goto err_devlink_unlock;
1554	}
1555
1556	err = devl_register(devlink);
1557	if (err)
1558		goto err_vfc_free;
1559
1560	err = nsim_dev_resources_register(devlink);
1561	if (err)
1562		goto err_dl_unregister;
1563
1564	err = devl_params_register(devlink, nsim_devlink_params,
1565				   ARRAY_SIZE(nsim_devlink_params));
1566	if (err)
1567		goto err_resource_unregister;
1568	nsim_devlink_set_params_init_values(nsim_dev, devlink);
1569
1570	err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1571	if (err)
1572		goto err_params_unregister;
1573
1574	err = nsim_dev_traps_init(devlink);
1575	if (err)
1576		goto err_dummy_region_exit;
1577
1578	err = nsim_dev_debugfs_init(nsim_dev);
1579	if (err)
1580		goto err_traps_exit;
1581
1582	nsim_dev->fib_data = nsim_fib_create(devlink, NULL);
1583	if (IS_ERR(nsim_dev->fib_data)) {
1584		err = PTR_ERR(nsim_dev->fib_data);
1585		goto err_debugfs_exit;
1586	}
1587
1588	err = nsim_dev_health_init(nsim_dev, devlink);
1589	if (err)
1590		goto err_fib_destroy;
1591
1592	err = nsim_bpf_dev_init(nsim_dev);
1593	if (err)
1594		goto err_health_exit;
1595
1596	err = nsim_dev_psample_init(nsim_dev);
1597	if (err)
1598		goto err_bpf_dev_exit;
1599
1600	err = nsim_dev_hwstats_init(nsim_dev);
1601	if (err)
1602		goto err_psample_exit;
1603
1604	err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
1605	if (err)
1606		goto err_hwstats_exit;
1607
1608	nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY;
1609	devl_unlock(devlink);
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_bpf_dev_exit:
1617	nsim_bpf_dev_exit(nsim_dev);
1618err_health_exit:
1619	nsim_dev_health_exit(nsim_dev);
1620err_fib_destroy:
1621	nsim_fib_destroy(devlink, nsim_dev->fib_data);
1622err_debugfs_exit:
1623	nsim_dev_debugfs_exit(nsim_dev);
1624err_traps_exit:
1625	nsim_dev_traps_exit(devlink);
1626err_dummy_region_exit:
1627	nsim_dev_dummy_region_exit(nsim_dev);
1628err_params_unregister:
1629	devl_params_unregister(devlink, nsim_devlink_params,
1630			       ARRAY_SIZE(nsim_devlink_params));
1631err_resource_unregister:
1632	devl_resources_unregister(devlink);
1633err_dl_unregister:
1634	devl_unregister(devlink);
1635err_vfc_free:
1636	kfree(nsim_dev->vfconfigs);
1637err_devlink_unlock:
1638	devl_unlock(devlink);
1639	devlink_free(devlink);
1640	dev_set_drvdata(&nsim_bus_dev->dev, NULL);
1641	return err;
1642}
1643
1644static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev)
1645{
1646	struct devlink *devlink = priv_to_devlink(nsim_dev);
1647
1648	if (devlink_is_reload_failed(devlink))
1649		return;
1650	debugfs_remove(nsim_dev->take_snapshot);
1651
1652	if (nsim_dev_get_vfs(nsim_dev)) {
1653		nsim_bus_dev_set_vfs(nsim_dev->nsim_bus_dev, 0);
1654		if (nsim_esw_mode_is_switchdev(nsim_dev))
1655			nsim_esw_legacy_enable(nsim_dev, NULL);
1656	}
1657
1658	nsim_dev_port_del_all(nsim_dev);
1659	nsim_dev_hwstats_exit(nsim_dev);
1660	nsim_dev_psample_exit(nsim_dev);
1661	nsim_dev_health_exit(nsim_dev);
1662	nsim_fib_destroy(devlink, nsim_dev->fib_data);
1663	nsim_dev_traps_exit(devlink);
1664	nsim_dev_dummy_region_exit(nsim_dev);
1665}
1666
1667void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev)
1668{
1669	struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1670	struct devlink *devlink = priv_to_devlink(nsim_dev);
1671
1672	devl_lock(devlink);
1673	nsim_dev_reload_destroy(nsim_dev);
1674
1675	nsim_bpf_dev_exit(nsim_dev);
1676	nsim_dev_debugfs_exit(nsim_dev);
1677	devl_params_unregister(devlink, nsim_devlink_params,
1678			       ARRAY_SIZE(nsim_devlink_params));
1679	devl_resources_unregister(devlink);
1680	devl_unregister(devlink);
1681	kfree(nsim_dev->vfconfigs);
1682	kfree(nsim_dev->fa_cookie);
1683	devl_unlock(devlink);
1684	devlink_free(devlink);
1685	dev_set_drvdata(&nsim_bus_dev->dev, NULL);
1686}
1687
1688static struct nsim_dev_port *
1689__nsim_dev_port_lookup(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
1690		       unsigned int port_index)
1691{
1692	struct nsim_dev_port *nsim_dev_port;
1693
1694	port_index = nsim_dev_port_index(type, port_index);
1695	list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list)
1696		if (nsim_dev_port->port_index == port_index)
1697			return nsim_dev_port;
1698	return NULL;
1699}
1700
1701int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type,
1702		      unsigned int port_index)
1703{
1704	struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1705	int err;
1706
1707	devl_lock(priv_to_devlink(nsim_dev));
1708	if (__nsim_dev_port_lookup(nsim_dev, type, port_index))
1709		err = -EEXIST;
1710	else
1711		err = __nsim_dev_port_add(nsim_dev, type, port_index);
1712	devl_unlock(priv_to_devlink(nsim_dev));
1713	return err;
1714}
1715
1716int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type,
1717		      unsigned int port_index)
1718{
1719	struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1720	struct nsim_dev_port *nsim_dev_port;
1721	int err = 0;
1722
1723	devl_lock(priv_to_devlink(nsim_dev));
1724	nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, type, port_index);
1725	if (!nsim_dev_port)
1726		err = -ENOENT;
1727	else
1728		__nsim_dev_port_del(nsim_dev_port);
1729	devl_unlock(priv_to_devlink(nsim_dev));
1730	return err;
1731}
1732
1733int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev,
1734			   unsigned int num_vfs)
1735{
1736	struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1737	struct devlink *devlink = priv_to_devlink(nsim_dev);
1738	int ret = 0;
1739
1740	devl_lock(devlink);
1741	if (nsim_bus_dev->num_vfs == num_vfs)
1742		goto exit_unlock;
1743	if (nsim_bus_dev->num_vfs && num_vfs) {
1744		ret = -EBUSY;
1745		goto exit_unlock;
1746	}
1747	if (nsim_bus_dev->max_vfs < num_vfs) {
1748		ret = -ENOMEM;
1749		goto exit_unlock;
1750	}
1751
1752	nsim_bus_dev_set_vfs(nsim_bus_dev, num_vfs);
1753	if (nsim_esw_mode_is_switchdev(nsim_dev)) {
1754		if (num_vfs) {
1755			ret = nsim_esw_switchdev_enable(nsim_dev, NULL);
1756			if (ret) {
1757				nsim_bus_dev_set_vfs(nsim_bus_dev, 0);
1758				goto exit_unlock;
1759			}
1760		} else {
1761			nsim_esw_legacy_enable(nsim_dev, NULL);
1762		}
1763	}
1764
1765exit_unlock:
1766	devl_unlock(devlink);
1767
1768	return ret;
1769}
1770
1771int nsim_dev_init(void)
1772{
1773	nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL);
1774	return PTR_ERR_OR_ZERO(nsim_dev_ddir);
 
 
1775}
1776
1777void nsim_dev_exit(void)
1778{
1779	debugfs_remove_recursive(nsim_dev_ddir);
1780}