mesh.c

   1// SPDX-License-Identifier: GPL-2.0
   2#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
   3
   4#include <linux/delay.h>
   5#include <linux/etherdevice.h>
   6#include <linux/hardirq.h>
   7#include <linux/netdevice.h>
   8#include <linux/if_ether.h>
   9#include <linux/if_arp.h>
  10#include <linux/kthread.h>
  11#include <linux/kfifo.h>
  12#include <net/cfg80211.h>
  13
  14#include "mesh.h"
  15#include "decl.h"
  16#include "cmd.h"
  17
  18
  19static int lbs_add_mesh(struct lbs_private *priv);
  20
  21/***************************************************************************
  22 * Mesh command handling
  23 */
  24
  25static int lbs_mesh_access(struct lbs_private *priv, uint16_t cmd_action,
  26		    struct cmd_ds_mesh_access *cmd)
  27{
  28	int ret;
  29
  30	cmd->hdr.command = cpu_to_le16(CMD_MESH_ACCESS);
  31	cmd->hdr.size = cpu_to_le16(sizeof(*cmd));
  32	cmd->hdr.result = 0;
  33
  34	cmd->action = cpu_to_le16(cmd_action);
  35
  36	ret = lbs_cmd_with_response(priv, CMD_MESH_ACCESS, cmd);
  37
  38	return ret;
  39}
  40
  41static int __lbs_mesh_config_send(struct lbs_private *priv,
  42				  struct cmd_ds_mesh_config *cmd,
  43				  uint16_t action, uint16_t type)
  44{
  45	int ret;
  46	u16 command = CMD_MESH_CONFIG_OLD;
  47
  48	/*
  49	 * Command id is 0xac for v10 FW along with mesh interface
  50	 * id in bits 14-13-12.
  51	 */
  52	if (priv->mesh_tlv == TLV_TYPE_MESH_ID)
  53		command = CMD_MESH_CONFIG |
  54			  (MESH_IFACE_ID << MESH_IFACE_BIT_OFFSET);
  55
  56	cmd->hdr.command = cpu_to_le16(command);
  57	cmd->hdr.size = cpu_to_le16(sizeof(struct cmd_ds_mesh_config));
  58	cmd->hdr.result = 0;
  59
  60	cmd->type = cpu_to_le16(type);
  61	cmd->action = cpu_to_le16(action);
  62
  63	ret = lbs_cmd_with_response(priv, command, cmd);
  64
  65	return ret;
  66}
  67
  68static int lbs_mesh_config_send(struct lbs_private *priv,
  69			 struct cmd_ds_mesh_config *cmd,
  70			 uint16_t action, uint16_t type)
  71{
  72	int ret;
  73
  74	if (!(priv->fwcapinfo & FW_CAPINFO_PERSISTENT_CONFIG))
  75		return -EOPNOTSUPP;
  76
  77	ret = __lbs_mesh_config_send(priv, cmd, action, type);
  78	return ret;
  79}
  80
  81/* This function is the CMD_MESH_CONFIG legacy function.  It only handles the
  82 * START and STOP actions.  The extended actions supported by CMD_MESH_CONFIG
  83 * are all handled by preparing a struct cmd_ds_mesh_config and passing it to
  84 * lbs_mesh_config_send.
  85 */
  86static int lbs_mesh_config(struct lbs_private *priv, uint16_t action,
  87		uint16_t chan)
  88{
  89	struct wireless_dev *mesh_wdev;
  90	struct cmd_ds_mesh_config cmd;
  91	struct mrvl_meshie *ie;
  92
  93	memset(&cmd, 0, sizeof(cmd));
  94	cmd.channel = cpu_to_le16(chan);
  95	ie = (struct mrvl_meshie *)cmd.data;
  96
  97	switch (action) {
  98	case CMD_ACT_MESH_CONFIG_START:
  99		ie->id = WLAN_EID_VENDOR_SPECIFIC;
 100		ie->val.oui[0] = 0x00;
 101		ie->val.oui[1] = 0x50;
 102		ie->val.oui[2] = 0x43;
 103		ie->val.type = MARVELL_MESH_IE_TYPE;
 104		ie->val.subtype = MARVELL_MESH_IE_SUBTYPE;
 105		ie->val.version = MARVELL_MESH_IE_VERSION;
 106		ie->val.active_protocol_id = MARVELL_MESH_PROTO_ID_HWMP;
 107		ie->val.active_metric_id = MARVELL_MESH_METRIC_ID;
 108		ie->val.mesh_capability = MARVELL_MESH_CAPABILITY;
 109
 110		if (priv->mesh_dev) {
 111			mesh_wdev = priv->mesh_dev->ieee80211_ptr;
 112			ie->val.mesh_id_len = mesh_wdev->u.mesh.id_up_len;
 113			memcpy(ie->val.mesh_id, mesh_wdev->u.mesh.id,
 114						mesh_wdev->u.mesh.id_up_len);
 115		}
 116
 117		ie->len = sizeof(struct mrvl_meshie_val) -
 118			IEEE80211_MAX_SSID_LEN + ie->val.mesh_id_len;
 119
 120		cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie_val));
 121		break;
 122	case CMD_ACT_MESH_CONFIG_STOP:
 123		break;
 124	default:
 125		return -1;
 126	}
 127	lbs_deb_cmd("mesh config action %d type %x channel %d SSID %*pE\n",
 128		    action, priv->mesh_tlv, chan, ie->val.mesh_id_len,
 129		    ie->val.mesh_id);
 130
 131	return __lbs_mesh_config_send(priv, &cmd, action, priv->mesh_tlv);
 132}
 133
 134int lbs_mesh_set_channel(struct lbs_private *priv, u8 channel)
 135{
 136	priv->mesh_channel = channel;
 137	return lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, channel);
 138}
 139
 140static uint16_t lbs_mesh_get_channel(struct lbs_private *priv)
 141{
 142	return priv->mesh_channel ?: 1;
 143}
 144
 145/***************************************************************************
 146 * Mesh sysfs support
 147 */
 148
 149/*
 150 * Attributes exported through sysfs
 151 */
 152
 153/**
 154 * anycast_mask_show - Get function for sysfs attribute anycast_mask
 155 * @dev: the &struct device
 156 * @attr: device attributes
 157 * @buf: buffer where data will be returned
 158 */
 159static ssize_t anycast_mask_show(struct device *dev,
 160				 struct device_attribute *attr, char *buf)
 161{
 162	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 163	struct cmd_ds_mesh_access mesh_access;
 164	int ret;
 165
 166	memset(&mesh_access, 0, sizeof(mesh_access));
 167
 168	ret = lbs_mesh_access(priv, CMD_ACT_MESH_GET_ANYCAST, &mesh_access);
 169	if (ret)
 170		return ret;
 171
 172	return sysfs_emit(buf, "0x%X\n", le32_to_cpu(mesh_access.data[0]));
 173}
 174
 175/**
 176 * anycast_mask_store - Set function for sysfs attribute anycast_mask
 177 * @dev: the &struct device
 178 * @attr: device attributes
 179 * @buf: buffer that contains new attribute value
 180 * @count: size of buffer
 181 */
 182static ssize_t anycast_mask_store(struct device *dev,
 183				  struct device_attribute *attr,
 184				  const char *buf, size_t count)
 185{
 186	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 187	struct cmd_ds_mesh_access mesh_access;
 188	uint32_t datum;
 189	int ret;
 190
 191	ret = kstrtouint(buf, 16, &datum);
 192	if (ret)
 193		return ret;
 194
 195	memset(&mesh_access, 0, sizeof(mesh_access));
 196	mesh_access.data[0] = cpu_to_le32(datum);
 197
 198	ret = lbs_mesh_access(priv, CMD_ACT_MESH_SET_ANYCAST, &mesh_access);
 199	if (ret)
 200		return ret;
 201
 202	return strlen(buf);
 203}
 204
 205/**
 206 * prb_rsp_limit_show - Get function for sysfs attribute prb_rsp_limit
 207 * @dev: the &struct device
 208 * @attr: device attributes
 209 * @buf: buffer where data will be returned
 210 */
 211static ssize_t prb_rsp_limit_show(struct device *dev,
 212				  struct device_attribute *attr, char *buf)
 213{
 214	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 215	struct cmd_ds_mesh_access mesh_access;
 216	int ret;
 217	u32 retry_limit;
 218
 219	memset(&mesh_access, 0, sizeof(mesh_access));
 220	mesh_access.data[0] = cpu_to_le32(CMD_ACT_GET);
 221
 222	ret = lbs_mesh_access(priv, CMD_ACT_MESH_SET_GET_PRB_RSP_LIMIT,
 223			&mesh_access);
 224	if (ret)
 225		return ret;
 226
 227	retry_limit = le32_to_cpu(mesh_access.data[1]);
 228	return sysfs_emit(buf, "%d\n", retry_limit);
 229}
 230
 231/**
 232 * prb_rsp_limit_store - Set function for sysfs attribute prb_rsp_limit
 233 * @dev: the &struct device
 234 * @attr: device attributes
 235 * @buf: buffer that contains new attribute value
 236 * @count: size of buffer
 237 */
 238static ssize_t prb_rsp_limit_store(struct device *dev,
 239				   struct device_attribute *attr,
 240				   const char *buf, size_t count)
 241{
 242	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 243	struct cmd_ds_mesh_access mesh_access;
 244	int ret;
 245	unsigned long retry_limit;
 246
 247	ret = kstrtoul(buf, 10, &retry_limit);
 248	if (ret)
 249		return ret;
 250	if (retry_limit > 15)
 251		return -ENOTSUPP;
 252
 253	memset(&mesh_access, 0, sizeof(mesh_access));
 254	mesh_access.data[0] = cpu_to_le32(CMD_ACT_SET);
 255	mesh_access.data[1] = cpu_to_le32(retry_limit);
 256
 257	ret = lbs_mesh_access(priv, CMD_ACT_MESH_SET_GET_PRB_RSP_LIMIT,
 258			&mesh_access);
 259	if (ret)
 260		return ret;
 261
 262	return strlen(buf);
 263}
 264
 265/**
 266 * lbs_mesh_show - Get function for sysfs attribute mesh
 267 * @dev: the &struct device
 268 * @attr: device attributes
 269 * @buf: buffer where data will be returned
 270 */
 271static ssize_t lbs_mesh_show(struct device *dev,
 272			     struct device_attribute *attr, char *buf)
 273{
 274	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 275	return sysfs_emit(buf, "0x%X\n", !!priv->mesh_dev);
 276}
 277
 278/**
 279 * lbs_mesh_store - Set function for sysfs attribute mesh
 280 * @dev: the &struct device
 281 * @attr: device attributes
 282 * @buf: buffer that contains new attribute value
 283 * @count: size of buffer
 284 */
 285static ssize_t lbs_mesh_store(struct device *dev,
 286			      struct device_attribute *attr,
 287			      const char *buf, size_t count)
 288{
 289	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 290	int ret, enable;
 291
 292	ret = kstrtoint(buf, 16, &enable);
 293	if (ret)
 294		return ret;
 295
 296	enable = !!enable;
 297	if (enable == !!priv->mesh_dev)
 298		return count;
 299
 300	if (enable)
 301		lbs_add_mesh(priv);
 302	else
 303		lbs_remove_mesh(priv);
 304
 305	return count;
 306}
 307
 308/*
 309 * lbs_mesh attribute to be exported per ethX interface
 310 * through sysfs (/sys/class/net/ethX/lbs_mesh)
 311 */
 312static DEVICE_ATTR_RW(lbs_mesh);
 313
 314/*
 315 * anycast_mask attribute to be exported per mshX interface
 316 * through sysfs (/sys/class/net/mshX/anycast_mask)
 317 */
 318static DEVICE_ATTR_RW(anycast_mask);
 319
 320/*
 321 * prb_rsp_limit attribute to be exported per mshX interface
 322 * through sysfs (/sys/class/net/mshX/prb_rsp_limit)
 323 */
 324static DEVICE_ATTR_RW(prb_rsp_limit);
 325
 326static struct attribute *lbs_mesh_sysfs_entries[] = {
 327	&dev_attr_anycast_mask.attr,
 328	&dev_attr_prb_rsp_limit.attr,
 329	NULL,
 330};
 331
 332static const struct attribute_group lbs_mesh_attr_group = {
 333	.attrs = lbs_mesh_sysfs_entries,
 334};
 335
 336
 337/***************************************************************************
 338 * Persistent configuration support
 339 */
 340
 341static int mesh_get_default_parameters(struct device *dev,
 342				       struct mrvl_mesh_defaults *defs)
 343{
 344	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 345	struct cmd_ds_mesh_config cmd;
 346	int ret;
 347
 348	memset(&cmd, 0, sizeof(struct cmd_ds_mesh_config));
 349	ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_GET,
 350				   CMD_TYPE_MESH_GET_DEFAULTS);
 351
 352	if (ret)
 353		return -EOPNOTSUPP;
 354
 355	memcpy(defs, &cmd.data[0], sizeof(struct mrvl_mesh_defaults));
 356
 357	return 0;
 358}
 359
 360/**
 361 * bootflag_show - Get function for sysfs attribute bootflag
 362 * @dev: the &struct device
 363 * @attr: device attributes
 364 * @buf: buffer where data will be returned
 365 */
 366static ssize_t bootflag_show(struct device *dev,
 367			     struct device_attribute *attr, char *buf)
 368{
 369	struct mrvl_mesh_defaults defs;
 370	int ret;
 371
 372	ret = mesh_get_default_parameters(dev, &defs);
 373
 374	if (ret)
 375		return ret;
 376
 377	return sysfs_emit(buf, "%d\n", le32_to_cpu(defs.bootflag));
 378}
 379
 380/**
 381 * bootflag_store - Set function for sysfs attribute bootflag
 382 * @dev: the &struct device
 383 * @attr: device attributes
 384 * @buf: buffer that contains new attribute value
 385 * @count: size of buffer
 386 */
 387static ssize_t bootflag_store(struct device *dev, struct device_attribute *attr,
 388			      const char *buf, size_t count)
 389{
 390	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 391	struct cmd_ds_mesh_config cmd;
 392	uint32_t datum;
 393	int ret;
 394
 395	ret = kstrtouint(buf, 10, &datum);
 396	if (ret)
 397		return ret;
 398	if (datum > 1)
 399		return -EINVAL;
 400
 401	memset(&cmd, 0, sizeof(cmd));
 402	*((__le32 *)&cmd.data[0]) = cpu_to_le32(!!datum);
 403	cmd.length = cpu_to_le16(sizeof(uint32_t));
 404	ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
 405				   CMD_TYPE_MESH_SET_BOOTFLAG);
 406	if (ret)
 407		return ret;
 408
 409	return strlen(buf);
 410}
 411
 412/**
 413 * boottime_show - Get function for sysfs attribute boottime
 414 * @dev: the &struct device
 415 * @attr: device attributes
 416 * @buf: buffer where data will be returned
 417 */
 418static ssize_t boottime_show(struct device *dev,
 419			     struct device_attribute *attr, char *buf)
 420{
 421	struct mrvl_mesh_defaults defs;
 422	int ret;
 423
 424	ret = mesh_get_default_parameters(dev, &defs);
 425
 426	if (ret)
 427		return ret;
 428
 429	return sysfs_emit(buf, "%d\n", defs.boottime);
 430}
 431
 432/**
 433 * boottime_store - Set function for sysfs attribute boottime
 434 * @dev: the &struct device
 435 * @attr: device attributes
 436 * @buf: buffer that contains new attribute value
 437 * @count: size of buffer
 438 */
 439static ssize_t boottime_store(struct device *dev,
 440			      struct device_attribute *attr,
 441			      const char *buf, size_t count)
 442{
 443	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 444	struct cmd_ds_mesh_config cmd;
 445	uint32_t datum;
 446	int ret;
 447
 448	ret = kstrtouint(buf, 10, &datum);
 449	if (ret)
 450		return ret;
 451	if (datum > 255)
 452		return -EINVAL;
 453
 454	memset(&cmd, 0, sizeof(cmd));
 455
 456	/* A too small boot time will result in the device booting into
 457	 * standalone (no-host) mode before the host can take control of it,
 458	 * so the change will be hard to revert.  This may be a desired
 459	 * feature (e.g to configure a very fast boot time for devices that
 460	 * will not be attached to a host), but dangerous.  So I'm enforcing a
 461	 * lower limit of 20 seconds:  remove and recompile the driver if this
 462	 * does not work for you.
 463	 */
 464	datum = (datum < 20) ? 20 : datum;
 465	cmd.data[0] = datum;
 466	cmd.length = cpu_to_le16(sizeof(uint8_t));
 467	ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
 468				   CMD_TYPE_MESH_SET_BOOTTIME);
 469	if (ret)
 470		return ret;
 471
 472	return strlen(buf);
 473}
 474
 475/**
 476 * channel_show - Get function for sysfs attribute channel
 477 * @dev: the &struct device
 478 * @attr: device attributes
 479 * @buf: buffer where data will be returned
 480 */
 481static ssize_t channel_show(struct device *dev,
 482			    struct device_attribute *attr, char *buf)
 483{
 484	struct mrvl_mesh_defaults defs;
 485	int ret;
 486
 487	ret = mesh_get_default_parameters(dev, &defs);
 488
 489	if (ret)
 490		return ret;
 491
 492	return sysfs_emit(buf, "%d\n", le16_to_cpu(defs.channel));
 493}
 494
 495/**
 496 * channel_store - Set function for sysfs attribute channel
 497 * @dev: the &struct device
 498 * @attr: device attributes
 499 * @buf: buffer that contains new attribute value
 500 * @count: size of buffer
 501 */
 502static ssize_t channel_store(struct device *dev, struct device_attribute *attr,
 503			     const char *buf, size_t count)
 504{
 505	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 506	struct cmd_ds_mesh_config cmd;
 507	uint32_t datum;
 508	int ret;
 509
 510	ret = kstrtouint(buf, 10, &datum);
 511	if (ret)
 512		return ret;
 513	if (datum < 1 || datum > 11)
 514		return -EINVAL;
 515
 516	memset(&cmd, 0, sizeof(cmd));
 517	*((__le16 *)&cmd.data[0]) = cpu_to_le16(datum);
 518	cmd.length = cpu_to_le16(sizeof(uint16_t));
 519	ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
 520				   CMD_TYPE_MESH_SET_DEF_CHANNEL);
 521	if (ret)
 522		return ret;
 523
 524	return strlen(buf);
 525}
 526
 527/**
 528 * mesh_id_show - Get function for sysfs attribute mesh_id
 529 * @dev: the &struct device
 530 * @attr: device attributes
 531 * @buf: buffer where data will be returned
 532 */
 533static ssize_t mesh_id_show(struct device *dev, struct device_attribute *attr,
 534			    char *buf)
 535{
 536	struct mrvl_mesh_defaults defs;
 537	int ret;
 538
 539	ret = mesh_get_default_parameters(dev, &defs);
 540
 541	if (ret)
 542		return ret;
 543
 544	if (defs.meshie.val.mesh_id_len > IEEE80211_MAX_SSID_LEN) {
 545		dev_err(dev, "inconsistent mesh ID length\n");
 546		defs.meshie.val.mesh_id_len = IEEE80211_MAX_SSID_LEN;
 547	}
 548
 549	memcpy(buf, defs.meshie.val.mesh_id, defs.meshie.val.mesh_id_len);
 550	buf[defs.meshie.val.mesh_id_len] = '\n';
 551	buf[defs.meshie.val.mesh_id_len + 1] = '\0';
 552
 553	return defs.meshie.val.mesh_id_len + 1;
 554}
 555
 556/**
 557 * mesh_id_store - Set function for sysfs attribute mesh_id
 558 * @dev: the &struct device
 559 * @attr: device attributes
 560 * @buf: buffer that contains new attribute value
 561 * @count: size of buffer
 562 */
 563static ssize_t mesh_id_store(struct device *dev, struct device_attribute *attr,
 564			     const char *buf, size_t count)
 565{
 566	struct cmd_ds_mesh_config cmd;
 567	struct mrvl_mesh_defaults defs;
 568	struct mrvl_meshie *ie;
 569	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 570	int len;
 571	int ret;
 572
 573	if (count < 2 || count > IEEE80211_MAX_SSID_LEN + 1)
 574		return -EINVAL;
 575
 576	memset(&cmd, 0, sizeof(struct cmd_ds_mesh_config));
 577	ie = (struct mrvl_meshie *) &cmd.data[0];
 578
 579	/* fetch all other Information Element parameters */
 580	ret = mesh_get_default_parameters(dev, &defs);
 581
 582	cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie));
 583
 584	/* transfer IE elements */
 585	memcpy(ie, &defs.meshie, sizeof(struct mrvl_meshie));
 586
 587	len = count - 1;
 588	memcpy(ie->val.mesh_id, buf, len);
 589	/* SSID len */
 590	ie->val.mesh_id_len = len;
 591	/* IE len */
 592	ie->len = sizeof(struct mrvl_meshie_val) - IEEE80211_MAX_SSID_LEN + len;
 593
 594	ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
 595				   CMD_TYPE_MESH_SET_MESH_IE);
 596	if (ret)
 597		return ret;
 598
 599	return strlen(buf);
 600}
 601
 602/**
 603 * protocol_id_show - Get function for sysfs attribute protocol_id
 604 * @dev: the &struct device
 605 * @attr: device attributes
 606 * @buf: buffer where data will be returned
 607 */
 608static ssize_t protocol_id_show(struct device *dev,
 609				struct device_attribute *attr,
 610				char *buf)
 611{
 612	struct mrvl_mesh_defaults defs;
 613	int ret;
 614
 615	ret = mesh_get_default_parameters(dev, &defs);
 616
 617	if (ret)
 618		return ret;
 619
 620	return sysfs_emit(buf, "%d\n", defs.meshie.val.active_protocol_id);
 621}
 622
 623/**
 624 * protocol_id_store - Set function for sysfs attribute protocol_id
 625 * @dev: the &struct device
 626 * @attr: device attributes
 627 * @buf: buffer that contains new attribute value
 628 * @count: size of buffer
 629 */
 630static ssize_t protocol_id_store(struct device *dev,
 631				 struct device_attribute *attr,
 632				 const char *buf, size_t count)
 633{
 634	struct cmd_ds_mesh_config cmd;
 635	struct mrvl_mesh_defaults defs;
 636	struct mrvl_meshie *ie;
 637	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 638	uint32_t datum;
 639	int ret;
 640
 641	ret = kstrtouint(buf, 10, &datum);
 642	if (ret)
 643		return ret;
 644	if (datum > 255)
 645		return -EINVAL;
 646
 647	memset(&cmd, 0, sizeof(cmd));
 648
 649	/* fetch all other Information Element parameters */
 650	ret = mesh_get_default_parameters(dev, &defs);
 651
 652	cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie));
 653
 654	/* transfer IE elements */
 655	ie = (struct mrvl_meshie *) &cmd.data[0];
 656	memcpy(ie, &defs.meshie, sizeof(struct mrvl_meshie));
 657	/* update protocol id */
 658	ie->val.active_protocol_id = datum;
 659
 660	ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
 661				   CMD_TYPE_MESH_SET_MESH_IE);
 662	if (ret)
 663		return ret;
 664
 665	return strlen(buf);
 666}
 667
 668/**
 669 * metric_id_show - Get function for sysfs attribute metric_id
 670 * @dev: the &struct device
 671 * @attr: device attributes
 672 * @buf: buffer where data will be returned
 673 */
 674static ssize_t metric_id_show(struct device *dev,
 675			      struct device_attribute *attr, char *buf)
 676{
 677	struct mrvl_mesh_defaults defs;
 678	int ret;
 679
 680	ret = mesh_get_default_parameters(dev, &defs);
 681
 682	if (ret)
 683		return ret;
 684
 685	return sysfs_emit(buf, "%d\n", defs.meshie.val.active_metric_id);
 686}
 687
 688/**
 689 * metric_id_store - Set function for sysfs attribute metric_id
 690 * @dev: the &struct device
 691 * @attr: device attributes
 692 * @buf: buffer that contains new attribute value
 693 * @count: size of buffer
 694 */
 695static ssize_t metric_id_store(struct device *dev,
 696			       struct device_attribute *attr,
 697			       const char *buf, size_t count)
 698{
 699	struct cmd_ds_mesh_config cmd;
 700	struct mrvl_mesh_defaults defs;
 701	struct mrvl_meshie *ie;
 702	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 703	uint32_t datum;
 704	int ret;
 705
 706	memset(&cmd, 0, sizeof(cmd));
 707	ret = sscanf(buf, "%d", &datum);
 708	if ((ret != 1) || (datum > 255))
 709		return -EINVAL;
 710
 711	/* fetch all other Information Element parameters */
 712	ret = mesh_get_default_parameters(dev, &defs);
 713
 714	cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie));
 715
 716	/* transfer IE elements */
 717	ie = (struct mrvl_meshie *) &cmd.data[0];
 718	memcpy(ie, &defs.meshie, sizeof(struct mrvl_meshie));
 719	/* update metric id */
 720	ie->val.active_metric_id = datum;
 721
 722	ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
 723				   CMD_TYPE_MESH_SET_MESH_IE);
 724	if (ret)
 725		return ret;
 726
 727	return strlen(buf);
 728}
 729
 730/**
 731 * capability_show - Get function for sysfs attribute capability
 732 * @dev: the &struct device
 733 * @attr: device attributes
 734 * @buf: buffer where data will be returned
 735 */
 736static ssize_t capability_show(struct device *dev,
 737			       struct device_attribute *attr, char *buf)
 738{
 739	struct mrvl_mesh_defaults defs;
 740	int ret;
 741
 742	ret = mesh_get_default_parameters(dev, &defs);
 743
 744	if (ret)
 745		return ret;
 746
 747	return sysfs_emit(buf, "%d\n", defs.meshie.val.mesh_capability);
 748}
 749
 750/**
 751 * capability_store - Set function for sysfs attribute capability
 752 * @dev: the &struct device
 753 * @attr: device attributes
 754 * @buf: buffer that contains new attribute value
 755 * @count: size of buffer
 756 */
 757static ssize_t capability_store(struct device *dev,
 758				struct device_attribute *attr,
 759				const char *buf, size_t count)
 760{
 761	struct cmd_ds_mesh_config cmd;
 762	struct mrvl_mesh_defaults defs;
 763	struct mrvl_meshie *ie;
 764	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 765	uint32_t datum;
 766	int ret;
 767
 768	memset(&cmd, 0, sizeof(cmd));
 769	ret = sscanf(buf, "%d", &datum);
 770	if ((ret != 1) || (datum > 255))
 771		return -EINVAL;
 772
 773	/* fetch all other Information Element parameters */
 774	ret = mesh_get_default_parameters(dev, &defs);
 775
 776	cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie));
 777
 778	/* transfer IE elements */
 779	ie = (struct mrvl_meshie *) &cmd.data[0];
 780	memcpy(ie, &defs.meshie, sizeof(struct mrvl_meshie));
 781	/* update value */
 782	ie->val.mesh_capability = datum;
 783
 784	ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
 785				   CMD_TYPE_MESH_SET_MESH_IE);
 786	if (ret)
 787		return ret;
 788
 789	return strlen(buf);
 790}
 791
 792
 793static DEVICE_ATTR_RW(bootflag);
 794static DEVICE_ATTR_RW(boottime);
 795static DEVICE_ATTR_RW(channel);
 796static DEVICE_ATTR_RW(mesh_id);
 797static DEVICE_ATTR_RW(protocol_id);
 798static DEVICE_ATTR_RW(metric_id);
 799static DEVICE_ATTR_RW(capability);
 800
 801static struct attribute *boot_opts_attrs[] = {
 802	&dev_attr_bootflag.attr,
 803	&dev_attr_boottime.attr,
 804	&dev_attr_channel.attr,
 805	NULL
 806};
 807
 808static const struct attribute_group boot_opts_group = {
 809	.name = "boot_options",
 810	.attrs = boot_opts_attrs,
 811};
 812
 813static struct attribute *mesh_ie_attrs[] = {
 814	&dev_attr_mesh_id.attr,
 815	&dev_attr_protocol_id.attr,
 816	&dev_attr_metric_id.attr,
 817	&dev_attr_capability.attr,
 818	NULL
 819};
 820
 821static const struct attribute_group mesh_ie_group = {
 822	.name = "mesh_ie",
 823	.attrs = mesh_ie_attrs,
 824};
 825
 826
 827/***************************************************************************
 828 * Initializing and starting, stopping mesh
 829 */
 830
 831/*
 832 * Check mesh FW version and appropriately send the mesh start
 833 * command
 834 */
 835void lbs_init_mesh(struct lbs_private *priv)
 836{
 837	/* Determine mesh_fw_ver from fwrelease and fwcapinfo */
 838	/* 5.0.16p0 9.0.0.p0 is known to NOT support any mesh */
 839	/* 5.110.22 have mesh command with 0xa3 command id */
 840	/* 10.0.0.p0 FW brings in mesh config command with different id */
 841	/* Check FW version MSB and initialize mesh_fw_ver */
 842	if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V5) {
 843		/* Enable mesh, if supported, and work out which TLV it uses.
 844		   0x100 + 291 is an unofficial value used in 5.110.20.pXX
 845		   0x100 + 37 is the official value used in 5.110.21.pXX
 846		   but we check them in that order because 20.pXX doesn't
 847		   give an error -- it just silently fails. */
 848
 849		/* 5.110.20.pXX firmware will fail the command if the channel
 850		   doesn't match the existing channel. But only if the TLV
 851		   is correct. If the channel is wrong, _BOTH_ versions will
 852		   give an error to 0x100+291, and allow 0x100+37 to succeed.
 853		   It's just that 5.110.20.pXX will not have done anything
 854		   useful */
 855
 856		priv->mesh_tlv = TLV_TYPE_OLD_MESH_ID;
 857		if (lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, 1)) {
 858			priv->mesh_tlv = TLV_TYPE_MESH_ID;
 859			if (lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, 1))
 860				priv->mesh_tlv = 0;
 861		}
 862	} else
 863	if ((MRVL_FW_MAJOR_REV(priv->fwrelease) >= MRVL_FW_V10) &&
 864		(priv->fwcapinfo & MESH_CAPINFO_ENABLE_MASK)) {
 865		/* 10.0.0.pXX new firmwares should succeed with TLV
 866		 * 0x100+37; Do not invoke command with old TLV.
 867		 */
 868		priv->mesh_tlv = TLV_TYPE_MESH_ID;
 869		if (lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, 1))
 870			priv->mesh_tlv = 0;
 871	}
 872
 873	/* Stop meshing until interface is brought up */
 874	lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_STOP, 1);
 875}
 876
 877void lbs_start_mesh(struct lbs_private *priv)
 878{
 879	lbs_add_mesh(priv);
 880
 881	if (device_create_file(&priv->dev->dev, &dev_attr_lbs_mesh))
 882		netdev_err(priv->dev, "cannot register lbs_mesh attribute\n");
 883}
 884
 885int lbs_deinit_mesh(struct lbs_private *priv)
 886{
 887	struct net_device *dev = priv->dev;
 888	int ret = 0;
 889
 890	if (priv->mesh_tlv) {
 891		device_remove_file(&dev->dev, &dev_attr_lbs_mesh);
 892		ret = 1;
 893	}
 894
 895	return ret;
 896}
 897
 898
 899/**
 900 * lbs_mesh_stop - close the mshX interface
 901 *
 902 * @dev:	A pointer to &net_device structure
 903 * returns:	0
 904 */
 905static int lbs_mesh_stop(struct net_device *dev)
 906{
 907	struct lbs_private *priv = dev->ml_priv;
 908
 909	lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_STOP,
 910		lbs_mesh_get_channel(priv));
 911
 912	spin_lock_irq(&priv->driver_lock);
 913
 914	netif_stop_queue(dev);
 915	netif_carrier_off(dev);
 916
 917	spin_unlock_irq(&priv->driver_lock);
 918
 919	lbs_update_mcast(priv);
 920	if (!lbs_iface_active(priv))
 921		lbs_stop_iface(priv);
 922
 923	return 0;
 924}
 925
 926/**
 927 * lbs_mesh_dev_open - open the mshX interface
 928 *
 929 * @dev:	A pointer to &net_device structure
 930 * returns:	0 or -EBUSY if monitor mode active
 931 */
 932static int lbs_mesh_dev_open(struct net_device *dev)
 933{
 934	struct lbs_private *priv = dev->ml_priv;
 935	int ret = 0;
 936
 937	if (!priv->iface_running) {
 938		ret = lbs_start_iface(priv);
 939		if (ret)
 940			goto out;
 941	}
 942
 943	spin_lock_irq(&priv->driver_lock);
 944
 945	if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) {
 946		ret = -EBUSY;
 947		spin_unlock_irq(&priv->driver_lock);
 948		goto out;
 949	}
 950
 951	netif_carrier_on(dev);
 952
 953	if (!priv->tx_pending_len)
 954		netif_wake_queue(dev);
 955
 956	spin_unlock_irq(&priv->driver_lock);
 957
 958	ret = lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START,
 959		lbs_mesh_get_channel(priv));
 960
 961out:
 962	return ret;
 963}
 964
 965static const struct net_device_ops mesh_netdev_ops = {
 966	.ndo_open		= lbs_mesh_dev_open,
 967	.ndo_stop 		= lbs_mesh_stop,
 968	.ndo_start_xmit		= lbs_hard_start_xmit,
 969	.ndo_set_mac_address	= lbs_set_mac_address,
 970	.ndo_set_rx_mode	= lbs_set_multicast_list,
 971};
 972
 973/**
 974 * lbs_add_mesh - add mshX interface
 975 *
 976 * @priv:	A pointer to the &struct lbs_private structure
 977 * returns:	0 if successful, -X otherwise
 978 */
 979static int lbs_add_mesh(struct lbs_private *priv)
 980{
 981	struct net_device *mesh_dev = NULL;
 982	struct wireless_dev *mesh_wdev;
 983	int ret = 0;
 984
 985	/* Allocate a virtual mesh device */
 986	mesh_wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL);
 987	if (!mesh_wdev) {
 988		lbs_deb_mesh("init mshX wireless device failed\n");
 989		ret = -ENOMEM;
 990		goto done;
 991	}
 992
 993	mesh_dev = alloc_netdev(0, "msh%d", NET_NAME_UNKNOWN, ether_setup);
 994	if (!mesh_dev) {
 995		lbs_deb_mesh("init mshX device failed\n");
 996		ret = -ENOMEM;
 997		goto err_free_wdev;
 998	}
 999
1000	mesh_wdev->iftype = NL80211_IFTYPE_MESH_POINT;
1001	mesh_wdev->wiphy = priv->wdev->wiphy;
1002
1003	if (priv->mesh_tlv) {
1004		sprintf(mesh_wdev->u.mesh.id, "mesh");
1005		mesh_wdev->u.mesh.id_up_len = 4;
1006	}
1007
1008	mesh_wdev->netdev = mesh_dev;
1009
1010	mesh_dev->ml_priv = priv;
1011	mesh_dev->ieee80211_ptr = mesh_wdev;
1012	priv->mesh_dev = mesh_dev;
1013
1014	mesh_dev->netdev_ops = &mesh_netdev_ops;
1015	mesh_dev->ethtool_ops = &lbs_ethtool_ops;
1016	eth_hw_addr_inherit(mesh_dev, priv->dev);
1017
1018	SET_NETDEV_DEV(priv->mesh_dev, priv->dev->dev.parent);
1019
1020	mesh_dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
1021	mesh_dev->sysfs_groups[0] = &lbs_mesh_attr_group;
1022	mesh_dev->sysfs_groups[1] = &boot_opts_group;
1023	mesh_dev->sysfs_groups[2] = &mesh_ie_group;
1024
1025	/* Register virtual mesh interface */
1026	ret = register_netdev(mesh_dev);
1027	if (ret) {
1028		pr_err("cannot register mshX virtual interface\n");
1029		goto err_free_netdev;
1030	}
1031
1032	/* Everything successful */
1033	ret = 0;
1034	goto done;
1035
1036err_free_netdev:
1037	free_netdev(mesh_dev);
1038
1039err_free_wdev:
1040	kfree(mesh_wdev);
1041
1042done:
1043	return ret;
1044}
1045
1046void lbs_remove_mesh(struct lbs_private *priv)
1047{
1048	struct net_device *mesh_dev;
1049
1050	mesh_dev = priv->mesh_dev;
1051	if (!mesh_dev)
1052		return;
1053
1054	netif_stop_queue(mesh_dev);
1055	netif_carrier_off(mesh_dev);
1056	unregister_netdev(mesh_dev);
1057	priv->mesh_dev = NULL;
1058	kfree(mesh_dev->ieee80211_ptr);
1059	free_netdev(mesh_dev);
1060}
1061
1062
1063/***************************************************************************
1064 * Sending and receiving
1065 */
1066struct net_device *lbs_mesh_set_dev(struct lbs_private *priv,
1067	struct net_device *dev, struct rxpd *rxpd)
1068{
1069	if (priv->mesh_dev) {
1070		if (priv->mesh_tlv == TLV_TYPE_OLD_MESH_ID) {
1071			if (rxpd->rx_control & RxPD_MESH_FRAME)
1072				dev = priv->mesh_dev;
1073		} else if (priv->mesh_tlv == TLV_TYPE_MESH_ID) {
1074			if (rxpd->u.bss.bss_num == MESH_IFACE_ID)
1075				dev = priv->mesh_dev;
1076		}
1077	}
1078	return dev;
1079}
1080
1081
1082void lbs_mesh_set_txpd(struct lbs_private *priv,
1083	struct net_device *dev, struct txpd *txpd)
1084{
1085	if (dev == priv->mesh_dev) {
1086		if (priv->mesh_tlv == TLV_TYPE_OLD_MESH_ID)
1087			txpd->tx_control |= cpu_to_le32(TxPD_MESH_FRAME);
1088		else if (priv->mesh_tlv == TLV_TYPE_MESH_ID)
1089			txpd->u.bss.bss_num = MESH_IFACE_ID;
1090	}
1091}
1092
1093
1094/***************************************************************************
1095 * Ethtool related
1096 */
1097
1098static const char mesh_stat_strings[MESH_STATS_NUM][ETH_GSTRING_LEN] = {
1099	"drop_duplicate_bcast",
1100	"drop_ttl_zero",
1101	"drop_no_fwd_route",
1102	"drop_no_buffers",
1103	"fwded_unicast_cnt",
1104	"fwded_bcast_cnt",
1105	"drop_blind_table",
1106	"tx_failed_cnt"
1107};
1108
1109void lbs_mesh_ethtool_get_stats(struct net_device *dev,
1110	struct ethtool_stats *stats, uint64_t *data)
1111{
1112	struct lbs_private *priv = dev->ml_priv;
1113	struct cmd_ds_mesh_access mesh_access;
1114	int ret;
1115
1116	/* Get Mesh Statistics */
1117	ret = lbs_mesh_access(priv, CMD_ACT_MESH_GET_STATS, &mesh_access);
1118
1119	if (ret) {
1120		memset(data, 0, MESH_STATS_NUM*(sizeof(uint64_t)));
1121		return;
1122	}
1123
1124	priv->mstats.fwd_drop_rbt = le32_to_cpu(mesh_access.data[0]);
1125	priv->mstats.fwd_drop_ttl = le32_to_cpu(mesh_access.data[1]);
1126	priv->mstats.fwd_drop_noroute = le32_to_cpu(mesh_access.data[2]);
1127	priv->mstats.fwd_drop_nobuf = le32_to_cpu(mesh_access.data[3]);
1128	priv->mstats.fwd_unicast_cnt = le32_to_cpu(mesh_access.data[4]);
1129	priv->mstats.fwd_bcast_cnt = le32_to_cpu(mesh_access.data[5]);
1130	priv->mstats.drop_blind = le32_to_cpu(mesh_access.data[6]);
1131	priv->mstats.tx_failed_cnt = le32_to_cpu(mesh_access.data[7]);
1132
1133	data[0] = priv->mstats.fwd_drop_rbt;
1134	data[1] = priv->mstats.fwd_drop_ttl;
1135	data[2] = priv->mstats.fwd_drop_noroute;
1136	data[3] = priv->mstats.fwd_drop_nobuf;
1137	data[4] = priv->mstats.fwd_unicast_cnt;
1138	data[5] = priv->mstats.fwd_bcast_cnt;
1139	data[6] = priv->mstats.drop_blind;
1140	data[7] = priv->mstats.tx_failed_cnt;
1141}
1142
1143int lbs_mesh_ethtool_get_sset_count(struct net_device *dev, int sset)
1144{
1145	struct lbs_private *priv = dev->ml_priv;
1146
1147	if (sset == ETH_SS_STATS && dev == priv->mesh_dev)
1148		return MESH_STATS_NUM;
1149
1150	return -EOPNOTSUPP;
1151}
1152
1153void lbs_mesh_ethtool_get_strings(struct net_device *dev,
1154	uint32_t stringset, uint8_t *s)
1155{
1156	switch (stringset) {
1157	case ETH_SS_STATS:
1158		memcpy(s, mesh_stat_strings, sizeof(mesh_stat_strings));
1159		break;
1160	}
1161}