drivers/net/dsa/bcm_sf2_cfp.c

   1 /*
   2  * Broadcom Starfighter 2 DSA switch CFP support
   3  *
   4  * Copyright (C) 2016, Broadcom
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #include <linux/list.h>
  13 #include <net/dsa.h>
  14 #include <linux/ethtool.h>
  15 #include <linux/if_ether.h>
  16 #include <linux/in.h>
  17 #include <linux/bitmap.h>
  18
  19 #include "bcm_sf2.h"
  20 #include "bcm_sf2_regs.h"
  21
  22 struct cfp_udf_layout {
  23         u8 slices[UDF_NUM_SLICES];
  24         u32 mask_value;
  25
  26 };
  27
  28 /* UDF slices layout for a TCPv4/UDPv4 specification */
  29 static const struct cfp_udf_layout udf_tcpip4_layout = {
  30         .slices = {
  31                 /* End of L2, byte offset 12, src IP[0:15] */
  32                 CFG_UDF_EOL2 | 6,
  33                 /* End of L2, byte offset 14, src IP[16:31] */
  34                 CFG_UDF_EOL2 | 7,
  35                 /* End of L2, byte offset 16, dst IP[0:15] */
  36                 CFG_UDF_EOL2 | 8,
  37                 /* End of L2, byte offset 18, dst IP[16:31] */
  38                 CFG_UDF_EOL2 | 9,
  39                 /* End of L3, byte offset 0, src port */
  40                 CFG_UDF_EOL3 | 0,
  41                 /* End of L3, byte offset 2, dst port */
  42                 CFG_UDF_EOL3 | 1,
  43                 0, 0, 0
  44         },
  45         .mask_value = L3_FRAMING_MASK | IPPROTO_MASK | IP_FRAG,
  46 };
  47
  48 static inline unsigned int bcm_sf2_get_num_udf_slices(const u8 *layout)
  49 {
  50         unsigned int i, count = 0;
  51
  52         for (i = 0; i < UDF_NUM_SLICES; i++) {
  53                 if (layout[i] != 0)
  54                         count++;
  55         }
  56
  57         return count;
  58 }
  59
  60 static void bcm_sf2_cfp_udf_set(struct bcm_sf2_priv *priv,
  61                                 unsigned int slice_num,
  62                                 const u8 *layout)
  63 {
  64         u32 offset = CORE_UDF_0_A_0_8_PORT_0 + slice_num * UDF_SLICE_OFFSET;
  65         unsigned int i;
  66
  67         for (i = 0; i < UDF_NUM_SLICES; i++)
  68                 core_writel(priv, layout[i], offset + i * 4);
  69 }
  70
  71 static int bcm_sf2_cfp_op(struct bcm_sf2_priv *priv, unsigned int op)
  72 {
  73         unsigned int timeout = 1000;
  74         u32 reg;
  75
  76         reg = core_readl(priv, CORE_CFP_ACC);
  77         reg &= ~(OP_SEL_MASK | RAM_SEL_MASK);
  78         reg |= OP_STR_DONE | op;
  79         core_writel(priv, reg, CORE_CFP_ACC);
  80
  81         do {
  82                 reg = core_readl(priv, CORE_CFP_ACC);
  83                 if (!(reg & OP_STR_DONE))
  84                         break;
  85
  86                 cpu_relax();
  87         } while (timeout--);
  88
  89         if (!timeout)
  90                 return -ETIMEDOUT;
  91
  92         return 0;
  93 }
  94
  95 static inline void bcm_sf2_cfp_rule_addr_set(struct bcm_sf2_priv *priv,
  96                                              unsigned int addr)
  97 {
  98         u32 reg;
  99
 100         WARN_ON(addr >= CFP_NUM_RULES);
 101
 102         reg = core_readl(priv, CORE_CFP_ACC);
 103         reg &= ~(XCESS_ADDR_MASK << XCESS_ADDR_SHIFT);
 104         reg |= addr << XCESS_ADDR_SHIFT;
 105         core_writel(priv, reg, CORE_CFP_ACC);
 106 }
 107
 108 static inline unsigned int bcm_sf2_cfp_rule_size(struct bcm_sf2_priv *priv)
 109 {
 110         /* Entry #0 is reserved */
 111         return CFP_NUM_RULES - 1;
 112 }
 113
 114 static int bcm_sf2_cfp_rule_set(struct dsa_switch *ds, int port,
 115                                 struct ethtool_rx_flow_spec *fs)
 116 {
 117         struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 118         struct ethtool_tcpip4_spec *v4_spec;
 119         const struct cfp_udf_layout *layout;
 120         unsigned int slice_num, rule_index;
 121         unsigned int queue_num, port_num;
 122         u8 ip_proto, ip_frag;
 123         u8 num_udf;
 124         u32 reg;
 125         int ret;
 126
 127         /* Check for unsupported extensions */
 128         if ((fs->flow_type & FLOW_EXT) &&
 129             (fs->m_ext.vlan_etype || fs->m_ext.data[1]))
 130                 return -EINVAL;
 131
 132         if (fs->location != RX_CLS_LOC_ANY &&
 133             test_bit(fs->location, priv->cfp.used))
 134                 return -EBUSY;
 135
 136         if (fs->location != RX_CLS_LOC_ANY &&
 137             fs->location > bcm_sf2_cfp_rule_size(priv))
 138                 return -EINVAL;
 139
 140         ip_frag = be32_to_cpu(fs->m_ext.data[0]);
 141
 142         /* We do not support discarding packets, check that the
 143          * destination port is enabled and that we are within the
 144          * number of ports supported by the switch
 145          */
 146         port_num = fs->ring_cookie / 8;
 147
 148         if (fs->ring_cookie == RX_CLS_FLOW_DISC ||
 149             !(BIT(port_num) & ds->enabled_port_mask) ||
 150             port_num >= priv->hw_params.num_ports)
 151                 return -EINVAL;
 152
 153         switch (fs->flow_type & ~FLOW_EXT) {
 154         case TCP_V4_FLOW:
 155                 ip_proto = IPPROTO_TCP;
 156                 v4_spec = &fs->h_u.tcp_ip4_spec;
 157                 break;
 158         case UDP_V4_FLOW:
 159                 ip_proto = IPPROTO_UDP;
 160                 v4_spec = &fs->h_u.udp_ip4_spec;
 161                 break;
 162         default:
 163                 return -EINVAL;
 164         }
 165
 166         /* We only use one UDF slice for now */
 167         slice_num = 1;
 168         layout = &udf_tcpip4_layout;
 169         num_udf = bcm_sf2_get_num_udf_slices(layout->slices);
 170
 171         /* Apply the UDF layout for this filter */
 172         bcm_sf2_cfp_udf_set(priv, slice_num, layout->slices);
 173
 174         /* Apply to all packets received through this port */
 175         core_writel(priv, BIT(port), CORE_CFP_DATA_PORT(7));
 176
 177         /* S-Tag status         [31:30]
 178          * C-Tag status         [29:28]
 179          * L2 framing           [27:26]
 180          * L3 framing           [25:24]
 181          * IP ToS               [23:16]
 182          * IP proto             [15:08]
 183          * IP Fragm             [7]
 184          * Non 1st frag         [6]
 185          * IP Authen            [5]
 186          * TTL range            [4:3]
 187          * PPPoE session        [2]
 188          * Reserved             [1]
 189          * UDF_Valid[8]         [0]
 190          */
 191         core_writel(priv, v4_spec->tos << 16 | ip_proto << 8 | ip_frag << 7,
 192                     CORE_CFP_DATA_PORT(6));
 193
 194         /* UDF_Valid[7:0]       [31:24]
 195          * S-Tag                [23:8]
 196          * C-Tag                [7:0]
 197          */
 198         core_writel(priv, GENMASK(num_udf - 1, 0) << 24, CORE_CFP_DATA_PORT(5));
 199
 200         /* C-Tag                [31:24]
 201          * UDF_n_A8             [23:8]
 202          * UDF_n_A7             [7:0]
 203          */
 204         core_writel(priv, 0, CORE_CFP_DATA_PORT(4));
 205
 206         /* UDF_n_A7             [31:24]
 207          * UDF_n_A6             [23:8]
 208          * UDF_n_A5             [7:0]
 209          */
 210         core_writel(priv, be16_to_cpu(v4_spec->pdst) >> 8,
 211                     CORE_CFP_DATA_PORT(3));
 212
 213         /* UDF_n_A5             [31:24]
 214          * UDF_n_A4             [23:8]
 215          * UDF_n_A3             [7:0]
 216          */
 217         reg = (be16_to_cpu(v4_spec->pdst) & 0xff) << 24 |
 218               (u32)be16_to_cpu(v4_spec->psrc) << 8 |
 219               (be32_to_cpu(v4_spec->ip4dst) & 0x0000ff00) >> 8;
 220         core_writel(priv, reg, CORE_CFP_DATA_PORT(2));
 221
 222         /* UDF_n_A3             [31:24]
 223          * UDF_n_A2             [23:8]
 224          * UDF_n_A1             [7:0]
 225          */
 226         reg = (u32)(be32_to_cpu(v4_spec->ip4dst) & 0xff) << 24 |
 227               (u32)(be32_to_cpu(v4_spec->ip4dst) >> 16) << 8 |
 228               (be32_to_cpu(v4_spec->ip4src) & 0x0000ff00) >> 8;
 229         core_writel(priv, reg, CORE_CFP_DATA_PORT(1));
 230
 231         /* UDF_n_A1             [31:24]
 232          * UDF_n_A0             [23:8]
 233          * Reserved             [7:4]
 234          * Slice ID             [3:2]
 235          * Slice valid          [1:0]
 236          */
 237         reg = (u32)(be32_to_cpu(v4_spec->ip4src) & 0xff) << 24 |
 238               (u32)(be32_to_cpu(v4_spec->ip4src) >> 16) << 8 |
 239               SLICE_NUM(slice_num) | SLICE_VALID;
 240         core_writel(priv, reg, CORE_CFP_DATA_PORT(0));
 241
 242         /* Source port map match */
 243         core_writel(priv, 0xff, CORE_CFP_MASK_PORT(7));
 244
 245         /* Mask with the specific layout for IPv4 packets */
 246         core_writel(priv, layout->mask_value, CORE_CFP_MASK_PORT(6));
 247
 248         /* Mask all but valid UDFs */
 249         core_writel(priv, GENMASK(num_udf - 1, 0) << 24, CORE_CFP_MASK_PORT(5));
 250
 251         /* Mask all */
 252         core_writel(priv, 0, CORE_CFP_MASK_PORT(4));
 253
 254         /* All other UDFs should be matched with the filter */
 255         core_writel(priv, 0xff, CORE_CFP_MASK_PORT(3));
 256         core_writel(priv, 0xffffffff, CORE_CFP_MASK_PORT(2));
 257         core_writel(priv, 0xffffffff, CORE_CFP_MASK_PORT(1));
 258         core_writel(priv, 0xffffff0f, CORE_CFP_MASK_PORT(0));
 259
 260         /* Locate the first rule available */
 261         if (fs->location == RX_CLS_LOC_ANY)
 262                 rule_index = find_first_zero_bit(priv->cfp.used,
 263                                                  bcm_sf2_cfp_rule_size(priv));
 264         else
 265                 rule_index = fs->location;
 266
 267         /* Insert into TCAM now */
 268         bcm_sf2_cfp_rule_addr_set(priv, rule_index);
 269
 270         ret = bcm_sf2_cfp_op(priv, OP_SEL_WRITE | TCAM_SEL);
 271         if (ret) {
 272                 pr_err("TCAM entry at addr %d failed\n", rule_index);
 273                 return ret;
 274         }
 275
 276         /* Replace ARL derived destination with DST_MAP derived, define
 277          * which port and queue this should be forwarded to.
 278          *
 279          * We have a small oddity where Port 6 just does not have a
 280          * valid bit here (so we subtract by one).
 281          */
 282         queue_num = fs->ring_cookie % 8;
 283         if (port_num >= 7)
 284                 port_num -= 1;
 285
 286         reg = CHANGE_FWRD_MAP_IB_REP_ARL | BIT(port_num + DST_MAP_IB_SHIFT) |
 287                 CHANGE_TC | queue_num << NEW_TC_SHIFT;
 288
 289         core_writel(priv, reg, CORE_ACT_POL_DATA0);
 290
 291         /* Set classification ID that needs to be put in Broadcom tag */
 292         core_writel(priv, rule_index << CHAIN_ID_SHIFT,
 293                     CORE_ACT_POL_DATA1);
 294
 295         core_writel(priv, 0, CORE_ACT_POL_DATA2);
 296
 297         /* Configure policer RAM now */
 298         ret = bcm_sf2_cfp_op(priv, OP_SEL_WRITE | ACT_POL_RAM);
 299         if (ret) {
 300                 pr_err("Policer entry at %d failed\n", rule_index);
 301                 return ret;
 302         }
 303
 304         /* Disable the policer */
 305         core_writel(priv, POLICER_MODE_DISABLE, CORE_RATE_METER0);
 306
 307         /* Now the rate meter */
 308         ret = bcm_sf2_cfp_op(priv, OP_SEL_WRITE | RATE_METER_RAM);
 309         if (ret) {
 310                 pr_err("Meter entry at %d failed\n", rule_index);
 311                 return ret;
 312         }
 313
 314         /* Turn on CFP for this rule now */
 315         reg = core_readl(priv, CORE_CFP_CTL_REG);
 316         reg |= BIT(port);
 317         core_writel(priv, reg, CORE_CFP_CTL_REG);
 318
 319         /* Flag the rule as being used and return it */
 320         set_bit(rule_index, priv->cfp.used);
 321         fs->location = rule_index;
 322
 323         return 0;
 324 }
 325
 326 static int bcm_sf2_cfp_rule_del(struct bcm_sf2_priv *priv, int port,
 327                                 u32 loc)
 328 {
 329         int ret;
 330         u32 reg;
 331
 332         /* Refuse deletion of unused rules, and the default reserved rule */
 333         if (!test_bit(loc, priv->cfp.used) || loc == 0)
 334                 return -EINVAL;
 335
 336         /* Indicate which rule we want to read */
 337         bcm_sf2_cfp_rule_addr_set(priv, loc);
 338
 339         ret =  bcm_sf2_cfp_op(priv, OP_SEL_READ | TCAM_SEL);
 340         if (ret)
 341                 return ret;
 342
 343         /* Clear its valid bits */
 344         reg = core_readl(priv, CORE_CFP_DATA_PORT(0));
 345         reg &= ~SLICE_VALID;
 346         core_writel(priv, reg, CORE_CFP_DATA_PORT(0));
 347
 348         /* Write back this entry into the TCAM now */
 349         ret = bcm_sf2_cfp_op(priv, OP_SEL_WRITE | TCAM_SEL);
 350         if (ret)
 351                 return ret;
 352
 353         clear_bit(loc, priv->cfp.used);
 354
 355         return 0;
 356 }
 357
 358 static void bcm_sf2_invert_masks(struct ethtool_rx_flow_spec *flow)
 359 {
 360         unsigned int i;
 361
 362         for (i = 0; i < sizeof(flow->m_u); i++)
 363                 flow->m_u.hdata[i] ^= 0xff;
 364
 365         flow->m_ext.vlan_etype ^= cpu_to_be16(~0);
 366         flow->m_ext.vlan_tci ^= cpu_to_be16(~0);
 367         flow->m_ext.data[0] ^= cpu_to_be32(~0);
 368         flow->m_ext.data[1] ^= cpu_to_be32(~0);
 369 }
 370
 371 static int bcm_sf2_cfp_rule_get(struct bcm_sf2_priv *priv, int port,
 372                                 struct ethtool_rxnfc *nfc, bool search)
 373 {
 374         struct ethtool_tcpip4_spec *v4_spec;
 375         unsigned int queue_num;
 376         u16 src_dst_port;
 377         u32 reg, ipv4;
 378         int ret;
 379
 380         if (!search) {
 381                 bcm_sf2_cfp_rule_addr_set(priv, nfc->fs.location);
 382
 383                 ret = bcm_sf2_cfp_op(priv, OP_SEL_READ | ACT_POL_RAM);
 384                 if (ret)
 385                         return ret;
 386
 387                 reg = core_readl(priv, CORE_ACT_POL_DATA0);
 388
 389                 ret = bcm_sf2_cfp_op(priv, OP_SEL_READ | TCAM_SEL);
 390                 if (ret)
 391                         return ret;
 392         } else {
 393                 reg = core_readl(priv, CORE_ACT_POL_DATA0);
 394         }
 395
 396         /* Extract the destination port */
 397         nfc->fs.ring_cookie = fls((reg >> DST_MAP_IB_SHIFT) &
 398                                   DST_MAP_IB_MASK) - 1;
 399
 400         /* There is no Port 6, so we compensate for that here */
 401         if (nfc->fs.ring_cookie >= 6)
 402                 nfc->fs.ring_cookie++;
 403         nfc->fs.ring_cookie *= 8;
 404
 405         /* Extract the destination queue */
 406         queue_num = (reg >> NEW_TC_SHIFT) & NEW_TC_MASK;
 407         nfc->fs.ring_cookie += queue_num;
 408
 409         /* Extract the IP protocol */
 410         reg = core_readl(priv, CORE_CFP_DATA_PORT(6));
 411         switch ((reg & IPPROTO_MASK) >> IPPROTO_SHIFT) {
 412         case IPPROTO_TCP:
 413                 nfc->fs.flow_type = TCP_V4_FLOW;
 414                 v4_spec = &nfc->fs.h_u.tcp_ip4_spec;
 415                 break;
 416         case IPPROTO_UDP:
 417                 nfc->fs.flow_type = UDP_V4_FLOW;
 418                 v4_spec = &nfc->fs.h_u.udp_ip4_spec;
 419                 break;
 420         default:
 421                 /* Clear to exit the search process */
 422                 if (search)
 423                         core_readl(priv, CORE_CFP_DATA_PORT(7));
 424                 return -EINVAL;
 425         }
 426
 427         v4_spec->tos = (reg >> 16) & IPPROTO_MASK;
 428         nfc->fs.m_ext.data[0] = cpu_to_be32((reg >> 7) & 1);
 429
 430         reg = core_readl(priv, CORE_CFP_DATA_PORT(3));
 431         /* src port [15:8] */
 432         src_dst_port = reg << 8;
 433
 434         reg = core_readl(priv, CORE_CFP_DATA_PORT(2));
 435         /* src port [7:0] */
 436         src_dst_port |= (reg >> 24);
 437
 438         v4_spec->pdst = cpu_to_be16(src_dst_port);
 439         nfc->fs.m_u.tcp_ip4_spec.pdst = cpu_to_be16(~0);
 440         v4_spec->psrc = cpu_to_be16((u16)(reg >> 8));
 441         nfc->fs.m_u.tcp_ip4_spec.psrc = cpu_to_be16(~0);
 442
 443         /* IPv4 dst [15:8] */
 444         ipv4 = (reg & 0xff) << 8;
 445         reg = core_readl(priv, CORE_CFP_DATA_PORT(1));
 446         /* IPv4 dst [31:16] */
 447         ipv4 |= ((reg >> 8) & 0xffff) << 16;
 448         /* IPv4 dst [7:0] */
 449         ipv4 |= (reg >> 24) & 0xff;
 450         v4_spec->ip4dst = cpu_to_be32(ipv4);
 451         nfc->fs.m_u.tcp_ip4_spec.ip4dst = cpu_to_be32(~0);
 452
 453         /* IPv4 src [15:8] */
 454         ipv4 = (reg & 0xff) << 8;
 455         reg = core_readl(priv, CORE_CFP_DATA_PORT(0));
 456
 457         if (!(reg & SLICE_VALID))
 458                 return -EINVAL;
 459
 460         /* IPv4 src [7:0] */
 461         ipv4 |= (reg >> 24) & 0xff;
 462         /* IPv4 src [31:16] */
 463         ipv4 |= ((reg >> 8) & 0xffff) << 16;
 464         v4_spec->ip4src = cpu_to_be32(ipv4);
 465         nfc->fs.m_u.tcp_ip4_spec.ip4src = cpu_to_be32(~0);
 466
 467         /* Read last to avoid next entry clobbering the results during search
 468          * operations
 469          */
 470         reg = core_readl(priv, CORE_CFP_DATA_PORT(7));
 471         if (!(reg & 1 << port))
 472                 return -EINVAL;
 473
 474         bcm_sf2_invert_masks(&nfc->fs);
 475
 476         /* Put the TCAM size here */
 477         nfc->data = bcm_sf2_cfp_rule_size(priv);
 478
 479         return 0;
 480 }
 481
 482 /* We implement the search doing a TCAM search operation */
 483 static int bcm_sf2_cfp_rule_get_all(struct bcm_sf2_priv *priv,
 484                                     int port, struct ethtool_rxnfc *nfc,
 485                                     u32 *rule_locs)
 486 {
 487         unsigned int index = 1, rules_cnt = 0;
 488         int ret;
 489         u32 reg;
 490
 491         /* Do not poll on OP_STR_DONE to be self-clearing for search
 492          * operations, we cannot use bcm_sf2_cfp_op here because it completes
 493          * on clearing OP_STR_DONE which won't clear until the entire search
 494          * operation is over.
 495          */
 496         reg = core_readl(priv, CORE_CFP_ACC);
 497         reg &= ~(XCESS_ADDR_MASK << XCESS_ADDR_SHIFT);
 498         reg |= index << XCESS_ADDR_SHIFT;
 499         reg &= ~(OP_SEL_MASK | RAM_SEL_MASK);
 500         reg |= OP_SEL_SEARCH | TCAM_SEL | OP_STR_DONE;
 501         core_writel(priv, reg, CORE_CFP_ACC);
 502
 503         do {
 504                 /* Wait for results to be ready */
 505                 reg = core_readl(priv, CORE_CFP_ACC);
 506
 507                 /* Extract the address we are searching */
 508                 index = reg >> XCESS_ADDR_SHIFT;
 509                 index &= XCESS_ADDR_MASK;
 510
 511                 /* We have a valid search result, so flag it accordingly */
 512                 if (reg & SEARCH_STS) {
 513                         ret = bcm_sf2_cfp_rule_get(priv, port, nfc, true);
 514                         if (ret)
 515                                 continue;
 516
 517                         rule_locs[rules_cnt] = index;
 518                         rules_cnt++;
 519                 }
 520
 521                 /* Search is over break out */
 522                 if (!(reg & OP_STR_DONE))
 523                         break;
 524
 525         } while (index < CFP_NUM_RULES);
 526
 527         /* Put the TCAM size here */
 528         nfc->data = bcm_sf2_cfp_rule_size(priv);
 529         nfc->rule_cnt = rules_cnt;
 530
 531         return 0;
 532 }
 533
 534 int bcm_sf2_get_rxnfc(struct dsa_switch *ds, int port,
 535                       struct ethtool_rxnfc *nfc, u32 *rule_locs)
 536 {
 537         struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 538         int ret = 0;
 539
 540         mutex_lock(&priv->cfp.lock);
 541
 542         switch (nfc->cmd) {
 543         case ETHTOOL_GRXCLSRLCNT:
 544                 /* Subtract the default, unusable rule */
 545                 nfc->rule_cnt = bitmap_weight(priv->cfp.used,
 546                                               CFP_NUM_RULES) - 1;
 547                 /* We support specifying rule locations */
 548                 nfc->data |= RX_CLS_LOC_SPECIAL;
 549                 break;
 550         case ETHTOOL_GRXCLSRULE:
 551                 ret = bcm_sf2_cfp_rule_get(priv, port, nfc, false);
 552                 break;
 553         case ETHTOOL_GRXCLSRLALL:
 554                 ret = bcm_sf2_cfp_rule_get_all(priv, port, nfc, rule_locs);
 555                 break;
 556         default:
 557                 ret = -EOPNOTSUPP;
 558                 break;
 559         }
 560
 561         mutex_unlock(&priv->cfp.lock);
 562
 563         return ret;
 564 }
 565
 566 int bcm_sf2_set_rxnfc(struct dsa_switch *ds, int port,
 567                       struct ethtool_rxnfc *nfc)
 568 {
 569         struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 570         int ret = 0;
 571
 572         mutex_lock(&priv->cfp.lock);
 573
 574         switch (nfc->cmd) {
 575         case ETHTOOL_SRXCLSRLINS:
 576                 ret = bcm_sf2_cfp_rule_set(ds, port, &nfc->fs);
 577                 break;
 578
 579         case ETHTOOL_SRXCLSRLDEL:
 580                 ret = bcm_sf2_cfp_rule_del(priv, port, nfc->fs.location);
 581                 break;
 582         default:
 583                 ret = -EOPNOTSUPP;
 584                 break;
 585         }
 586
 587         mutex_unlock(&priv->cfp.lock);
 588
 589         return ret;
 590 }
 591
 592 int bcm_sf2_cfp_rst(struct bcm_sf2_priv *priv)
 593 {
 594         unsigned int timeout = 1000;
 595         u32 reg;
 596
 597         reg = core_readl(priv, CORE_CFP_ACC);
 598         reg |= TCAM_RESET;
 599         core_writel(priv, reg, CORE_CFP_ACC);
 600
 601         do {
 602                 reg = core_readl(priv, CORE_CFP_ACC);
 603                 if (!(reg & TCAM_RESET))
 604                         break;
 605
 606                 cpu_relax();
 607         } while (timeout--);
 608
 609         if (!timeout)
 610                 return -ETIMEDOUT;
 611
 612         return 0;
 613 }