drivers/net/phy/mscc/mscc_macsec.c

   1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
   2 /*
   3  * Driver for Microsemi VSC85xx PHYs - MACsec support
   4  *
   5  * Author: Antoine Tenart
   6  * License: Dual MIT/GPL
   7  * Copyright (c) 2020 Microsemi Corporation
   8  */
   9
  10 #include <linux/phy.h>
  11 #include <dt-bindings/net/mscc-phy-vsc8531.h>
  12
  13 #include <crypto/aes.h>
  14
  15 #include <net/macsec.h>
  16
  17 #include "mscc.h"
  18 #include "mscc_mac.h"
  19 #include "mscc_macsec.h"
  20 #include "mscc_fc_buffer.h"
  21
  22 static u32 vsc8584_macsec_phy_read(struct phy_device *phydev,
  23                                    enum macsec_bank bank, u32 reg)
  24 {
  25         u32 val, val_l = 0, val_h = 0;
  26         unsigned long deadline;
  27         int rc;
  28
  29         rc = phy_select_page(phydev, MSCC_PHY_PAGE_MACSEC);
  30         if (rc < 0)
  31                 goto failed;
  32
  33         __phy_write(phydev, MSCC_EXT_PAGE_MACSEC_20,
  34                     MSCC_PHY_MACSEC_20_TARGET(bank >> 2));
  35
  36         if (bank >> 2 == 0x1)
  37                 /* non-MACsec access */
  38                 bank &= 0x3;
  39         else
  40                 bank = 0;
  41
  42         __phy_write(phydev, MSCC_EXT_PAGE_MACSEC_19,
  43                     MSCC_PHY_MACSEC_19_CMD | MSCC_PHY_MACSEC_19_READ |
  44                     MSCC_PHY_MACSEC_19_REG_ADDR(reg) |
  45                     MSCC_PHY_MACSEC_19_TARGET(bank));
  46
  47         deadline = jiffies + msecs_to_jiffies(PROC_CMD_NCOMPLETED_TIMEOUT_MS);
  48         do {
  49                 val = __phy_read(phydev, MSCC_EXT_PAGE_MACSEC_19);
  50         } while (time_before(jiffies, deadline) && !(val & MSCC_PHY_MACSEC_19_CMD));
  51
  52         val_l = __phy_read(phydev, MSCC_EXT_PAGE_MACSEC_17);
  53         val_h = __phy_read(phydev, MSCC_EXT_PAGE_MACSEC_18);
  54
  55 failed:
  56         phy_restore_page(phydev, rc, rc);
  57
  58         return (val_h << 16) | val_l;
  59 }
  60
  61 static void vsc8584_macsec_phy_write(struct phy_device *phydev,
  62                                      enum macsec_bank bank, u32 reg, u32 val)
  63 {
  64         unsigned long deadline;
  65         int rc;
  66
  67         rc = phy_select_page(phydev, MSCC_PHY_PAGE_MACSEC);
  68         if (rc < 0)
  69                 goto failed;
  70
  71         __phy_write(phydev, MSCC_EXT_PAGE_MACSEC_20,
  72                     MSCC_PHY_MACSEC_20_TARGET(bank >> 2));
  73
  74         if ((bank >> 2 == 0x1) || (bank >> 2 == 0x3))
  75                 bank &= 0x3;
  76         else
  77                 /* MACsec access */
  78                 bank = 0;
  79
  80         __phy_write(phydev, MSCC_EXT_PAGE_MACSEC_17, (u16)val);
  81         __phy_write(phydev, MSCC_EXT_PAGE_MACSEC_18, (u16)(val >> 16));
  82
  83         __phy_write(phydev, MSCC_EXT_PAGE_MACSEC_19,
  84                     MSCC_PHY_MACSEC_19_CMD | MSCC_PHY_MACSEC_19_REG_ADDR(reg) |
  85                     MSCC_PHY_MACSEC_19_TARGET(bank));
  86
  87         deadline = jiffies + msecs_to_jiffies(PROC_CMD_NCOMPLETED_TIMEOUT_MS);
  88         do {
  89                 val = __phy_read(phydev, MSCC_EXT_PAGE_MACSEC_19);
  90         } while (time_before(jiffies, deadline) && !(val & MSCC_PHY_MACSEC_19_CMD));
  91
  92 failed:
  93         phy_restore_page(phydev, rc, rc);
  94 }
  95
  96 static void vsc8584_macsec_classification(struct phy_device *phydev,
  97                                           enum macsec_bank bank)
  98 {
  99         /* enable VLAN tag parsing */
 100         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_SAM_CP_TAG,
 101                                  MSCC_MS_SAM_CP_TAG_PARSE_STAG |
 102                                  MSCC_MS_SAM_CP_TAG_PARSE_QTAG |
 103                                  MSCC_MS_SAM_CP_TAG_PARSE_QINQ);
 104 }
 105
 106 static void vsc8584_macsec_flow_default_action(struct phy_device *phydev,
 107                                                enum macsec_bank bank,
 108                                                bool block)
 109 {
 110         u32 port = (bank == MACSEC_INGR) ?
 111                     MSCC_MS_PORT_UNCONTROLLED : MSCC_MS_PORT_COMMON;
 112         u32 action = MSCC_MS_FLOW_BYPASS;
 113
 114         if (block)
 115                 action = MSCC_MS_FLOW_DROP;
 116
 117         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_SAM_NM_FLOW_NCP,
 118                                  /* MACsec untagged */
 119                                  MSCC_MS_SAM_NM_FLOW_NCP_UNTAGGED_FLOW_TYPE(action) |
 120                                  MSCC_MS_SAM_NM_FLOW_NCP_UNTAGGED_DROP_ACTION(MSCC_MS_ACTION_DROP) |
 121                                  MSCC_MS_SAM_NM_FLOW_NCP_UNTAGGED_DEST_PORT(port) |
 122                                  /* MACsec tagged */
 123                                  MSCC_MS_SAM_NM_FLOW_NCP_TAGGED_FLOW_TYPE(action) |
 124                                  MSCC_MS_SAM_NM_FLOW_NCP_TAGGED_DROP_ACTION(MSCC_MS_ACTION_DROP) |
 125                                  MSCC_MS_SAM_NM_FLOW_NCP_TAGGED_DEST_PORT(port) |
 126                                  /* Bad tag */
 127                                  MSCC_MS_SAM_NM_FLOW_NCP_BADTAG_FLOW_TYPE(action) |
 128                                  MSCC_MS_SAM_NM_FLOW_NCP_BADTAG_DROP_ACTION(MSCC_MS_ACTION_DROP) |
 129                                  MSCC_MS_SAM_NM_FLOW_NCP_BADTAG_DEST_PORT(port) |
 130                                  /* Kay tag */
 131                                  MSCC_MS_SAM_NM_FLOW_NCP_KAY_FLOW_TYPE(action) |
 132                                  MSCC_MS_SAM_NM_FLOW_NCP_KAY_DROP_ACTION(MSCC_MS_ACTION_DROP) |
 133                                  MSCC_MS_SAM_NM_FLOW_NCP_KAY_DEST_PORT(port));
 134         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_SAM_NM_FLOW_CP,
 135                                  /* MACsec untagged */
 136                                  MSCC_MS_SAM_NM_FLOW_NCP_UNTAGGED_FLOW_TYPE(action) |
 137                                  MSCC_MS_SAM_NM_FLOW_CP_UNTAGGED_DROP_ACTION(MSCC_MS_ACTION_DROP) |
 138                                  MSCC_MS_SAM_NM_FLOW_CP_UNTAGGED_DEST_PORT(port) |
 139                                  /* MACsec tagged */
 140                                  MSCC_MS_SAM_NM_FLOW_NCP_TAGGED_FLOW_TYPE(action) |
 141                                  MSCC_MS_SAM_NM_FLOW_CP_TAGGED_DROP_ACTION(MSCC_MS_ACTION_DROP) |
 142                                  MSCC_MS_SAM_NM_FLOW_CP_TAGGED_DEST_PORT(port) |
 143                                  /* Bad tag */
 144                                  MSCC_MS_SAM_NM_FLOW_NCP_BADTAG_FLOW_TYPE(action) |
 145                                  MSCC_MS_SAM_NM_FLOW_CP_BADTAG_DROP_ACTION(MSCC_MS_ACTION_DROP) |
 146                                  MSCC_MS_SAM_NM_FLOW_CP_BADTAG_DEST_PORT(port) |
 147                                  /* Kay tag */
 148                                  MSCC_MS_SAM_NM_FLOW_NCP_KAY_FLOW_TYPE(action) |
 149                                  MSCC_MS_SAM_NM_FLOW_CP_KAY_DROP_ACTION(MSCC_MS_ACTION_DROP) |
 150                                  MSCC_MS_SAM_NM_FLOW_CP_KAY_DEST_PORT(port));
 151 }
 152
 153 static void vsc8584_macsec_integrity_checks(struct phy_device *phydev,
 154                                             enum macsec_bank bank)
 155 {
 156         u32 val;
 157
 158         if (bank != MACSEC_INGR)
 159                 return;
 160
 161         /* Set default rules to pass unmatched frames */
 162         val = vsc8584_macsec_phy_read(phydev, bank,
 163                                       MSCC_MS_PARAMS2_IG_CC_CONTROL);
 164         val |= MSCC_MS_PARAMS2_IG_CC_CONTROL_NON_MATCH_CTRL_ACT |
 165                MSCC_MS_PARAMS2_IG_CC_CONTROL_NON_MATCH_ACT;
 166         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_PARAMS2_IG_CC_CONTROL,
 167                                  val);
 168
 169         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_PARAMS2_IG_CP_TAG,
 170                                  MSCC_MS_PARAMS2_IG_CP_TAG_PARSE_STAG |
 171                                  MSCC_MS_PARAMS2_IG_CP_TAG_PARSE_QTAG |
 172                                  MSCC_MS_PARAMS2_IG_CP_TAG_PARSE_QINQ);
 173 }
 174
 175 static void vsc8584_macsec_block_init(struct phy_device *phydev,
 176                                       enum macsec_bank bank)
 177 {
 178         u32 val;
 179         int i;
 180
 181         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_ENA_CFG,
 182                                  MSCC_MS_ENA_CFG_SW_RST |
 183                                  MSCC_MS_ENA_CFG_MACSEC_BYPASS_ENA);
 184
 185         /* Set the MACsec block out of s/w reset and enable clocks */
 186         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_ENA_CFG,
 187                                  MSCC_MS_ENA_CFG_CLK_ENA);
 188
 189         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_STATUS_CONTEXT_CTRL,
 190                                  bank == MACSEC_INGR ? 0xe5880214 : 0xe5880218);
 191         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_MISC_CONTROL,
 192                                  MSCC_MS_MISC_CONTROL_MC_LATENCY_FIX(bank == MACSEC_INGR ? 57 : 40) |
 193                                  MSCC_MS_MISC_CONTROL_XFORM_REC_SIZE(bank == MACSEC_INGR ? 1 : 2));
 194
 195         /* Clear the counters */
 196         val = vsc8584_macsec_phy_read(phydev, bank, MSCC_MS_COUNT_CONTROL);
 197         val |= MSCC_MS_COUNT_CONTROL_AUTO_CNTR_RESET;
 198         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_COUNT_CONTROL, val);
 199
 200         /* Enable octet increment mode */
 201         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_PP_CTRL,
 202                                  MSCC_MS_PP_CTRL_MACSEC_OCTET_INCR_MODE);
 203
 204         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_BLOCK_CTX_UPDATE, 0x3);
 205
 206         val = vsc8584_macsec_phy_read(phydev, bank, MSCC_MS_COUNT_CONTROL);
 207         val |= MSCC_MS_COUNT_CONTROL_RESET_ALL;
 208         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_COUNT_CONTROL, val);
 209
 210         /* Set the MTU */
 211         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_NON_VLAN_MTU_CHECK,
 212                                  MSCC_MS_NON_VLAN_MTU_CHECK_NV_MTU_COMPARE(32761) |
 213                                  MSCC_MS_NON_VLAN_MTU_CHECK_NV_MTU_COMP_DROP);
 214
 215         for (i = 0; i < 8; i++)
 216                 vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_VLAN_MTU_CHECK(i),
 217                                          MSCC_MS_VLAN_MTU_CHECK_MTU_COMPARE(32761) |
 218                                          MSCC_MS_VLAN_MTU_CHECK_MTU_COMP_DROP);
 219
 220         if (bank == MACSEC_EGR) {
 221                 val = vsc8584_macsec_phy_read(phydev, bank, MSCC_MS_INTR_CTRL_STATUS);
 222                 val &= ~MSCC_MS_INTR_CTRL_STATUS_INTR_ENABLE_M;
 223                 vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_INTR_CTRL_STATUS, val);
 224
 225                 vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_FC_CFG,
 226                                          MSCC_MS_FC_CFG_FCBUF_ENA |
 227                                          MSCC_MS_FC_CFG_LOW_THRESH(0x1) |
 228                                          MSCC_MS_FC_CFG_HIGH_THRESH(0x4) |
 229                                          MSCC_MS_FC_CFG_LOW_BYTES_VAL(0x4) |
 230                                          MSCC_MS_FC_CFG_HIGH_BYTES_VAL(0x6));
 231         }
 232
 233         vsc8584_macsec_classification(phydev, bank);
 234         vsc8584_macsec_flow_default_action(phydev, bank, false);
 235         vsc8584_macsec_integrity_checks(phydev, bank);
 236
 237         /* Enable the MACsec block */
 238         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_ENA_CFG,
 239                                  MSCC_MS_ENA_CFG_CLK_ENA |
 240                                  MSCC_MS_ENA_CFG_MACSEC_ENA |
 241                                  MSCC_MS_ENA_CFG_MACSEC_SPEED_MODE(0x5));
 242 }
 243
 244 static void vsc8584_macsec_mac_init(struct phy_device *phydev,
 245                                     enum macsec_bank bank)
 246 {
 247         u32 val;
 248         int i;
 249
 250         /* Clear host & line stats */
 251         for (i = 0; i < 36; i++)
 252                 vsc8584_macsec_phy_write(phydev, bank, 0x1c + i, 0);
 253
 254         val = vsc8584_macsec_phy_read(phydev, bank,
 255                                       MSCC_MAC_PAUSE_CFG_TX_FRAME_CTRL);
 256         val &= ~MSCC_MAC_PAUSE_CFG_TX_FRAME_CTRL_PAUSE_MODE_M;
 257         val |= MSCC_MAC_PAUSE_CFG_TX_FRAME_CTRL_PAUSE_MODE(2) |
 258                MSCC_MAC_PAUSE_CFG_TX_FRAME_CTRL_PAUSE_VALUE(0xffff);
 259         vsc8584_macsec_phy_write(phydev, bank,
 260                                  MSCC_MAC_PAUSE_CFG_TX_FRAME_CTRL, val);
 261
 262         val = vsc8584_macsec_phy_read(phydev, bank,
 263                                       MSCC_MAC_PAUSE_CFG_TX_FRAME_CTRL_2);
 264         val |= 0xffff;
 265         vsc8584_macsec_phy_write(phydev, bank,
 266                                  MSCC_MAC_PAUSE_CFG_TX_FRAME_CTRL_2, val);
 267
 268         val = vsc8584_macsec_phy_read(phydev, bank,
 269                                       MSCC_MAC_PAUSE_CFG_RX_FRAME_CTRL);
 270         if (bank == HOST_MAC)
 271                 val |= MSCC_MAC_PAUSE_CFG_RX_FRAME_CTRL_PAUSE_TIMER_ENA |
 272                        MSCC_MAC_PAUSE_CFG_RX_FRAME_CTRL_PAUSE_FRAME_DROP_ENA;
 273         else
 274                 val |= MSCC_MAC_PAUSE_CFG_RX_FRAME_CTRL_PAUSE_REACT_ENA |
 275                        MSCC_MAC_PAUSE_CFG_RX_FRAME_CTRL_PAUSE_FRAME_DROP_ENA |
 276                        MSCC_MAC_PAUSE_CFG_RX_FRAME_CTRL_PAUSE_MODE |
 277                        MSCC_MAC_PAUSE_CFG_RX_FRAME_CTRL_EARLY_PAUSE_DETECT_ENA;
 278         vsc8584_macsec_phy_write(phydev, bank,
 279                                  MSCC_MAC_PAUSE_CFG_RX_FRAME_CTRL, val);
 280
 281         vsc8584_macsec_phy_write(phydev, bank, MSCC_MAC_CFG_PKTINF_CFG,
 282                                  MSCC_MAC_CFG_PKTINF_CFG_STRIP_FCS_ENA |
 283                                  MSCC_MAC_CFG_PKTINF_CFG_INSERT_FCS_ENA |
 284                                  MSCC_MAC_CFG_PKTINF_CFG_LPI_RELAY_ENA |
 285                                  MSCC_MAC_CFG_PKTINF_CFG_STRIP_PREAMBLE_ENA |
 286                                  MSCC_MAC_CFG_PKTINF_CFG_INSERT_PREAMBLE_ENA |
 287                                  (bank == HOST_MAC ?
 288                                   MSCC_MAC_CFG_PKTINF_CFG_ENABLE_TX_PADDING : 0) |
 289                                  (IS_ENABLED(CONFIG_NETWORK_PHY_TIMESTAMPING) ?
 290                                   MSCC_MAC_CFG_PKTINF_CFG_MACSEC_BYPASS_NUM_PTP_STALL_CLKS(0x8) : 0));
 291
 292         val = vsc8584_macsec_phy_read(phydev, bank, MSCC_MAC_CFG_MODE_CFG);
 293         val &= ~MSCC_MAC_CFG_MODE_CFG_DISABLE_DIC;
 294         vsc8584_macsec_phy_write(phydev, bank, MSCC_MAC_CFG_MODE_CFG, val);
 295
 296         val = vsc8584_macsec_phy_read(phydev, bank, MSCC_MAC_CFG_MAXLEN_CFG);
 297         val &= ~MSCC_MAC_CFG_MAXLEN_CFG_MAX_LEN_M;
 298         val |= MSCC_MAC_CFG_MAXLEN_CFG_MAX_LEN(10240);
 299         vsc8584_macsec_phy_write(phydev, bank, MSCC_MAC_CFG_MAXLEN_CFG, val);
 300
 301         vsc8584_macsec_phy_write(phydev, bank, MSCC_MAC_CFG_ADV_CHK_CFG,
 302                                  MSCC_MAC_CFG_ADV_CHK_CFG_SFD_CHK_ENA |
 303                                  MSCC_MAC_CFG_ADV_CHK_CFG_PRM_CHK_ENA |
 304                                  MSCC_MAC_CFG_ADV_CHK_CFG_OOR_ERR_ENA |
 305                                  MSCC_MAC_CFG_ADV_CHK_CFG_INR_ERR_ENA);
 306
 307         val = vsc8584_macsec_phy_read(phydev, bank, MSCC_MAC_CFG_LFS_CFG);
 308         val &= ~MSCC_MAC_CFG_LFS_CFG_LFS_MODE_ENA;
 309         vsc8584_macsec_phy_write(phydev, bank, MSCC_MAC_CFG_LFS_CFG, val);
 310
 311         vsc8584_macsec_phy_write(phydev, bank, MSCC_MAC_CFG_ENA_CFG,
 312                                  MSCC_MAC_CFG_ENA_CFG_RX_CLK_ENA |
 313                                  MSCC_MAC_CFG_ENA_CFG_TX_CLK_ENA |
 314                                  MSCC_MAC_CFG_ENA_CFG_RX_ENA |
 315                                  MSCC_MAC_CFG_ENA_CFG_TX_ENA);
 316 }
 317
 318 /* Must be called with mdio_lock taken */
 319 static int __vsc8584_macsec_init(struct phy_device *phydev)
 320 {
 321         struct vsc8531_private *priv = phydev->priv;
 322         enum macsec_bank proc_bank;
 323         u32 val;
 324
 325         vsc8584_macsec_block_init(phydev, MACSEC_INGR);
 326         vsc8584_macsec_block_init(phydev, MACSEC_EGR);
 327         vsc8584_macsec_mac_init(phydev, HOST_MAC);
 328         vsc8584_macsec_mac_init(phydev, LINE_MAC);
 329
 330         vsc8584_macsec_phy_write(phydev, FC_BUFFER,
 331                                  MSCC_FCBUF_FC_READ_THRESH_CFG,
 332                                  MSCC_FCBUF_FC_READ_THRESH_CFG_TX_THRESH(4) |
 333                                  MSCC_FCBUF_FC_READ_THRESH_CFG_RX_THRESH(5));
 334
 335         val = vsc8584_macsec_phy_read(phydev, FC_BUFFER, MSCC_FCBUF_MODE_CFG);
 336         val |= MSCC_FCBUF_MODE_CFG_PAUSE_GEN_ENA |
 337                MSCC_FCBUF_MODE_CFG_RX_PPM_RATE_ADAPT_ENA |
 338                MSCC_FCBUF_MODE_CFG_TX_PPM_RATE_ADAPT_ENA;
 339         vsc8584_macsec_phy_write(phydev, FC_BUFFER, MSCC_FCBUF_MODE_CFG, val);
 340
 341         vsc8584_macsec_phy_write(phydev, FC_BUFFER, MSCC_FCBUF_PPM_RATE_ADAPT_THRESH_CFG,
 342                                  MSCC_FCBUF_PPM_RATE_ADAPT_THRESH_CFG_TX_THRESH(8) |
 343                                  MSCC_FCBUF_PPM_RATE_ADAPT_THRESH_CFG_TX_OFFSET(9));
 344
 345         val = vsc8584_macsec_phy_read(phydev, FC_BUFFER,
 346                                       MSCC_FCBUF_TX_DATA_QUEUE_CFG);
 347         val &= ~(MSCC_FCBUF_TX_DATA_QUEUE_CFG_START_M |
 348                  MSCC_FCBUF_TX_DATA_QUEUE_CFG_END_M);
 349         val |= MSCC_FCBUF_TX_DATA_QUEUE_CFG_START(0) |
 350                 MSCC_FCBUF_TX_DATA_QUEUE_CFG_END(5119);
 351         vsc8584_macsec_phy_write(phydev, FC_BUFFER,
 352                                  MSCC_FCBUF_TX_DATA_QUEUE_CFG, val);
 353
 354         val = vsc8584_macsec_phy_read(phydev, FC_BUFFER, MSCC_FCBUF_ENA_CFG);
 355         val |= MSCC_FCBUF_ENA_CFG_TX_ENA | MSCC_FCBUF_ENA_CFG_RX_ENA;
 356         vsc8584_macsec_phy_write(phydev, FC_BUFFER, MSCC_FCBUF_ENA_CFG, val);
 357
 358         proc_bank = (priv->addr < 2) ? PROC_0 : PROC_2;
 359
 360         val = vsc8584_macsec_phy_read(phydev, proc_bank,
 361                                       MSCC_PROC_IP_1588_TOP_CFG_STAT_MODE_CTL);
 362         val &= ~MSCC_PROC_IP_1588_TOP_CFG_STAT_MODE_CTL_PROTOCOL_MODE_M;
 363         val |= MSCC_PROC_IP_1588_TOP_CFG_STAT_MODE_CTL_PROTOCOL_MODE(4);
 364         vsc8584_macsec_phy_write(phydev, proc_bank,
 365                                  MSCC_PROC_IP_1588_TOP_CFG_STAT_MODE_CTL, val);
 366
 367         return 0;
 368 }
 369
 370 static void vsc8584_macsec_flow(struct phy_device *phydev,
 371                                 struct macsec_flow *flow)
 372 {
 373         struct vsc8531_private *priv = phydev->priv;
 374         enum macsec_bank bank = flow->bank;
 375         u32 val, match = 0, mask = 0, action = 0, idx = flow->index;
 376
 377         if (flow->match.tagged)
 378                 match |= MSCC_MS_SAM_MISC_MATCH_TAGGED;
 379         if (flow->match.untagged)
 380                 match |= MSCC_MS_SAM_MISC_MATCH_UNTAGGED;
 381
 382         if (bank == MACSEC_INGR && flow->assoc_num >= 0) {
 383                 match |= MSCC_MS_SAM_MISC_MATCH_AN(flow->assoc_num);
 384                 mask |= MSCC_MS_SAM_MASK_AN_MASK(0x3);
 385         }
 386
 387         if (bank == MACSEC_INGR && flow->match.sci && flow->rx_sa->sc->sci) {
 388                 u64 sci = (__force u64)flow->rx_sa->sc->sci;
 389
 390                 match |= MSCC_MS_SAM_MISC_MATCH_TCI(BIT(3));
 391                 mask |= MSCC_MS_SAM_MASK_TCI_MASK(BIT(3)) |
 392                         MSCC_MS_SAM_MASK_SCI_MASK;
 393
 394                 vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_SAM_MATCH_SCI_LO(idx),
 395                                          lower_32_bits(sci));
 396                 vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_SAM_MATCH_SCI_HI(idx),
 397                                          upper_32_bits(sci));
 398         }
 399
 400         if (flow->match.etype) {
 401                 mask |= MSCC_MS_SAM_MASK_MAC_ETYPE_MASK;
 402
 403                 vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_SAM_MAC_SA_MATCH_HI(idx),
 404                                          MSCC_MS_SAM_MAC_SA_MATCH_HI_ETYPE((__force u32)htons(flow->etype)));
 405         }
 406
 407         match |= MSCC_MS_SAM_MISC_MATCH_PRIORITY(flow->priority);
 408
 409         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_SAM_MISC_MATCH(idx), match);
 410         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_SAM_MASK(idx), mask);
 411
 412         /* Action for matching packets */
 413         if (flow->action.drop)
 414                 action = MSCC_MS_FLOW_DROP;
 415         else if (flow->action.bypass || flow->port == MSCC_MS_PORT_UNCONTROLLED)
 416                 action = MSCC_MS_FLOW_BYPASS;
 417         else
 418                 action = (bank == MACSEC_INGR) ?
 419                          MSCC_MS_FLOW_INGRESS : MSCC_MS_FLOW_EGRESS;
 420
 421         val = MSCC_MS_SAM_FLOW_CTRL_FLOW_TYPE(action) |
 422               MSCC_MS_SAM_FLOW_CTRL_DROP_ACTION(MSCC_MS_ACTION_DROP) |
 423               MSCC_MS_SAM_FLOW_CTRL_DEST_PORT(flow->port);
 424
 425         if (action == MSCC_MS_FLOW_BYPASS)
 426                 goto write_ctrl;
 427
 428         if (bank == MACSEC_INGR) {
 429                 if (priv->secy->replay_protect)
 430                         val |= MSCC_MS_SAM_FLOW_CTRL_REPLAY_PROTECT;
 431                 if (priv->secy->validate_frames == MACSEC_VALIDATE_STRICT)
 432                         val |= MSCC_MS_SAM_FLOW_CTRL_VALIDATE_FRAMES(MSCC_MS_VALIDATE_STRICT);
 433                 else if (priv->secy->validate_frames == MACSEC_VALIDATE_CHECK)
 434                         val |= MSCC_MS_SAM_FLOW_CTRL_VALIDATE_FRAMES(MSCC_MS_VALIDATE_CHECK);
 435         } else if (bank == MACSEC_EGR) {
 436                 if (priv->secy->protect_frames)
 437                         val |= MSCC_MS_SAM_FLOW_CTRL_PROTECT_FRAME;
 438                 if (priv->secy->tx_sc.encrypt)
 439                         val |= MSCC_MS_SAM_FLOW_CTRL_CONF_PROTECT;
 440                 if (priv->secy->tx_sc.send_sci)
 441                         val |= MSCC_MS_SAM_FLOW_CTRL_INCLUDE_SCI;
 442         }
 443
 444 write_ctrl:
 445         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_SAM_FLOW_CTRL(idx), val);
 446 }
 447
 448 static struct macsec_flow *vsc8584_macsec_find_flow(struct macsec_context *ctx,
 449                                                     enum macsec_bank bank)
 450 {
 451         struct vsc8531_private *priv = ctx->phydev->priv;
 452         struct macsec_flow *pos, *tmp;
 453
 454         list_for_each_entry_safe(pos, tmp, &priv->macsec_flows, list)
 455                 if (pos->assoc_num == ctx->sa.assoc_num && pos->bank == bank)
 456                         return pos;
 457
 458         return ERR_PTR(-ENOENT);
 459 }
 460
 461 static void vsc8584_macsec_flow_enable(struct phy_device *phydev,
 462                                        struct macsec_flow *flow)
 463 {
 464         enum macsec_bank bank = flow->bank;
 465         u32 val, idx = flow->index;
 466
 467         if ((flow->bank == MACSEC_INGR && flow->rx_sa && !flow->rx_sa->active) ||
 468             (flow->bank == MACSEC_EGR && flow->tx_sa && !flow->tx_sa->active))
 469                 return;
 470
 471         /* Enable */
 472         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_SAM_ENTRY_SET1, BIT(idx));
 473
 474         /* Set in-use */
 475         val = vsc8584_macsec_phy_read(phydev, bank, MSCC_MS_SAM_FLOW_CTRL(idx));
 476         val |= MSCC_MS_SAM_FLOW_CTRL_SA_IN_USE;
 477         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_SAM_FLOW_CTRL(idx), val);
 478 }
 479
 480 static void vsc8584_macsec_flow_disable(struct phy_device *phydev,
 481                                         struct macsec_flow *flow)
 482 {
 483         enum macsec_bank bank = flow->bank;
 484         u32 val, idx = flow->index;
 485
 486         /* Disable */
 487         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_SAM_ENTRY_CLEAR1, BIT(idx));
 488
 489         /* Clear in-use */
 490         val = vsc8584_macsec_phy_read(phydev, bank, MSCC_MS_SAM_FLOW_CTRL(idx));
 491         val &= ~MSCC_MS_SAM_FLOW_CTRL_SA_IN_USE;
 492         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_SAM_FLOW_CTRL(idx), val);
 493 }
 494
 495 static u32 vsc8584_macsec_flow_context_id(struct macsec_flow *flow)
 496 {
 497         if (flow->bank == MACSEC_INGR)
 498                 return flow->index + MSCC_MS_MAX_FLOWS;
 499
 500         return flow->index;
 501 }
 502
 503 /* Derive the AES key to get a key for the hash autentication */
 504 static int vsc8584_macsec_derive_key(const u8 key[MACSEC_MAX_KEY_LEN],
 505                                      u16 key_len, u8 hkey[16])
 506 {
 507         const u8 input[AES_BLOCK_SIZE] = {0};
 508         struct crypto_aes_ctx ctx;
 509         int ret;
 510
 511         ret = aes_expandkey(&ctx, key, key_len);
 512         if (ret)
 513                 return ret;
 514
 515         aes_encrypt(&ctx, hkey, input);
 516         memzero_explicit(&ctx, sizeof(ctx));
 517         return 0;
 518 }
 519
 520 static int vsc8584_macsec_transformation(struct phy_device *phydev,
 521                                          struct macsec_flow *flow)
 522 {
 523         struct vsc8531_private *priv = phydev->priv;
 524         enum macsec_bank bank = flow->bank;
 525         int i, ret, index = flow->index;
 526         u32 rec = 0, control = 0;
 527         u8 hkey[16];
 528         u64 sci;
 529
 530         ret = vsc8584_macsec_derive_key(flow->key, priv->secy->key_len, hkey);
 531         if (ret)
 532                 return ret;
 533
 534         switch (priv->secy->key_len) {
 535         case 16:
 536                 control |= CONTROL_CRYPTO_ALG(CTRYPTO_ALG_AES_CTR_128);
 537                 break;
 538         case 32:
 539                 control |= CONTROL_CRYPTO_ALG(CTRYPTO_ALG_AES_CTR_256);
 540                 break;
 541         default:
 542                 return -EINVAL;
 543         }
 544
 545         control |= (bank == MACSEC_EGR) ?
 546                    (CONTROL_TYPE_EGRESS | CONTROL_AN(priv->secy->tx_sc.encoding_sa)) :
 547                    (CONTROL_TYPE_INGRESS | CONTROL_SEQ_MASK);
 548
 549         control |= CONTROL_UPDATE_SEQ | CONTROL_ENCRYPT_AUTH | CONTROL_KEY_IN_CTX |
 550                    CONTROL_IV0 | CONTROL_IV1 | CONTROL_IV_IN_SEQ |
 551                    CONTROL_DIGEST_TYPE(0x2) | CONTROL_SEQ_TYPE(0x1) |
 552                    CONTROL_AUTH_ALG(AUTH_ALG_AES_GHAS) | CONTROL_CONTEXT_ID;
 553
 554         /* Set the control word */
 555         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_XFORM_REC(index, rec++),
 556                                  control);
 557
 558         /* Set the context ID. Must be unique. */
 559         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_XFORM_REC(index, rec++),
 560                                  vsc8584_macsec_flow_context_id(flow));
 561
 562         /* Set the encryption/decryption key */
 563         for (i = 0; i < priv->secy->key_len / sizeof(u32); i++)
 564                 vsc8584_macsec_phy_write(phydev, bank,
 565                                          MSCC_MS_XFORM_REC(index, rec++),
 566                                          ((u32 *)flow->key)[i]);
 567
 568         /* Set the authentication key */
 569         for (i = 0; i < 4; i++)
 570                 vsc8584_macsec_phy_write(phydev, bank,
 571                                          MSCC_MS_XFORM_REC(index, rec++),
 572                                          ((u32 *)hkey)[i]);
 573
 574         /* Initial sequence number */
 575         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_XFORM_REC(index, rec++),
 576                                  bank == MACSEC_INGR ?
 577                                  flow->rx_sa->next_pn : flow->tx_sa->next_pn);
 578
 579         if (bank == MACSEC_INGR)
 580                 /* Set the mask (replay window size) */
 581                 vsc8584_macsec_phy_write(phydev, bank,
 582                                          MSCC_MS_XFORM_REC(index, rec++),
 583                                          priv->secy->replay_window);
 584
 585         /* Set the input vectors */
 586         sci = (__force u64)(bank == MACSEC_INGR ? flow->rx_sa->sc->sci : priv->secy->sci);
 587         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_XFORM_REC(index, rec++),
 588                                  lower_32_bits(sci));
 589         vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_XFORM_REC(index, rec++),
 590                                  upper_32_bits(sci));
 591
 592         while (rec < 20)
 593                 vsc8584_macsec_phy_write(phydev, bank, MSCC_MS_XFORM_REC(index, rec++),
 594                                          0);
 595
 596         flow->has_transformation = true;
 597         return 0;
 598 }
 599
 600 static struct macsec_flow *vsc8584_macsec_alloc_flow(struct vsc8531_private *priv,
 601                                                      enum macsec_bank bank)
 602 {
 603         unsigned long *bitmap = bank == MACSEC_INGR ?
 604                                 &priv->ingr_flows : &priv->egr_flows;
 605         struct macsec_flow *flow;
 606         int index;
 607
 608         index = find_first_zero_bit(bitmap, MSCC_MS_MAX_FLOWS);
 609
 610         if (index == MSCC_MS_MAX_FLOWS)
 611                 return ERR_PTR(-ENOMEM);
 612
 613         flow = kzalloc(sizeof(*flow), GFP_KERNEL);
 614         if (!flow)
 615                 return ERR_PTR(-ENOMEM);
 616
 617         set_bit(index, bitmap);
 618         flow->index = index;
 619         flow->bank = bank;
 620         flow->priority = 8;
 621         flow->assoc_num = -1;
 622
 623         list_add_tail(&flow->list, &priv->macsec_flows);
 624         return flow;
 625 }
 626
 627 static void vsc8584_macsec_free_flow(struct vsc8531_private *priv,
 628                                      struct macsec_flow *flow)
 629 {
 630         unsigned long *bitmap = flow->bank == MACSEC_INGR ?
 631                                 &priv->ingr_flows : &priv->egr_flows;
 632
 633         list_del(&flow->list);
 634         clear_bit(flow->index, bitmap);
 635         kfree(flow);
 636 }
 637
 638 static int vsc8584_macsec_add_flow(struct phy_device *phydev,
 639                                    struct macsec_flow *flow, bool update)
 640 {
 641         int ret;
 642
 643         flow->port = MSCC_MS_PORT_CONTROLLED;
 644         vsc8584_macsec_flow(phydev, flow);
 645
 646         if (update)
 647                 return 0;
 648
 649         ret = vsc8584_macsec_transformation(phydev, flow);
 650         if (ret) {
 651                 vsc8584_macsec_free_flow(phydev->priv, flow);
 652                 return ret;
 653         }
 654
 655         return 0;
 656 }
 657
 658 static int vsc8584_macsec_default_flows(struct phy_device *phydev)
 659 {
 660         struct macsec_flow *flow;
 661
 662         /* Add a rule to let the MKA traffic go through, ingress */
 663         flow = vsc8584_macsec_alloc_flow(phydev->priv, MACSEC_INGR);
 664         if (IS_ERR(flow))
 665                 return PTR_ERR(flow);
 666
 667         flow->priority = 15;
 668         flow->port = MSCC_MS_PORT_UNCONTROLLED;
 669         flow->match.tagged = 1;
 670         flow->match.untagged = 1;
 671         flow->match.etype = 1;
 672         flow->etype = ETH_P_PAE;
 673         flow->action.bypass = 1;
 674
 675         vsc8584_macsec_flow(phydev, flow);
 676         vsc8584_macsec_flow_enable(phydev, flow);
 677
 678         /* Add a rule to let the MKA traffic go through, egress */
 679         flow = vsc8584_macsec_alloc_flow(phydev->priv, MACSEC_EGR);
 680         if (IS_ERR(flow))
 681                 return PTR_ERR(flow);
 682
 683         flow->priority = 15;
 684         flow->port = MSCC_MS_PORT_COMMON;
 685         flow->match.untagged = 1;
 686         flow->match.etype = 1;
 687         flow->etype = ETH_P_PAE;
 688         flow->action.bypass = 1;
 689
 690         vsc8584_macsec_flow(phydev, flow);
 691         vsc8584_macsec_flow_enable(phydev, flow);
 692
 693         return 0;
 694 }
 695
 696 static void vsc8584_macsec_del_flow(struct phy_device *phydev,
 697                                     struct macsec_flow *flow)
 698 {
 699         vsc8584_macsec_flow_disable(phydev, flow);
 700         vsc8584_macsec_free_flow(phydev->priv, flow);
 701 }
 702
 703 static int __vsc8584_macsec_add_rxsa(struct macsec_context *ctx,
 704                                      struct macsec_flow *flow, bool update)
 705 {
 706         struct phy_device *phydev = ctx->phydev;
 707         struct vsc8531_private *priv = phydev->priv;
 708
 709         if (!flow) {
 710                 flow = vsc8584_macsec_alloc_flow(priv, MACSEC_INGR);
 711                 if (IS_ERR(flow))
 712                         return PTR_ERR(flow);
 713
 714                 memcpy(flow->key, ctx->sa.key, priv->secy->key_len);
 715         }
 716
 717         flow->assoc_num = ctx->sa.assoc_num;
 718         flow->rx_sa = ctx->sa.rx_sa;
 719
 720         /* Always match tagged packets on ingress */
 721         flow->match.tagged = 1;
 722         flow->match.sci = 1;
 723
 724         if (priv->secy->validate_frames != MACSEC_VALIDATE_DISABLED)
 725                 flow->match.untagged = 1;
 726
 727         return vsc8584_macsec_add_flow(phydev, flow, update);
 728 }
 729
 730 static int __vsc8584_macsec_add_txsa(struct macsec_context *ctx,
 731                                      struct macsec_flow *flow, bool update)
 732 {
 733         struct phy_device *phydev = ctx->phydev;
 734         struct vsc8531_private *priv = phydev->priv;
 735
 736         if (!flow) {
 737                 flow = vsc8584_macsec_alloc_flow(priv, MACSEC_EGR);
 738                 if (IS_ERR(flow))
 739                         return PTR_ERR(flow);
 740
 741                 memcpy(flow->key, ctx->sa.key, priv->secy->key_len);
 742         }
 743
 744         flow->assoc_num = ctx->sa.assoc_num;
 745         flow->tx_sa = ctx->sa.tx_sa;
 746
 747         /* Always match untagged packets on egress */
 748         flow->match.untagged = 1;
 749
 750         return vsc8584_macsec_add_flow(phydev, flow, update);
 751 }
 752
 753 static int vsc8584_macsec_dev_open(struct macsec_context *ctx)
 754 {
 755         struct vsc8531_private *priv = ctx->phydev->priv;
 756         struct macsec_flow *flow, *tmp;
 757
 758         /* No operation to perform before the commit step */
 759         if (ctx->prepare)
 760                 return 0;
 761
 762         list_for_each_entry_safe(flow, tmp, &priv->macsec_flows, list)
 763                 vsc8584_macsec_flow_enable(ctx->phydev, flow);
 764
 765         return 0;
 766 }
 767
 768 static int vsc8584_macsec_dev_stop(struct macsec_context *ctx)
 769 {
 770         struct vsc8531_private *priv = ctx->phydev->priv;
 771         struct macsec_flow *flow, *tmp;
 772
 773         /* No operation to perform before the commit step */
 774         if (ctx->prepare)
 775                 return 0;
 776
 777         list_for_each_entry_safe(flow, tmp, &priv->macsec_flows, list)
 778                 vsc8584_macsec_flow_disable(ctx->phydev, flow);
 779
 780         return 0;
 781 }
 782
 783 static int vsc8584_macsec_add_secy(struct macsec_context *ctx)
 784 {
 785         struct vsc8531_private *priv = ctx->phydev->priv;
 786         struct macsec_secy *secy = ctx->secy;
 787
 788         if (ctx->prepare) {
 789                 if (priv->secy)
 790                         return -EEXIST;
 791
 792                 return 0;
 793         }
 794
 795         priv->secy = secy;
 796
 797         vsc8584_macsec_flow_default_action(ctx->phydev, MACSEC_EGR,
 798                                            secy->validate_frames != MACSEC_VALIDATE_DISABLED);
 799         vsc8584_macsec_flow_default_action(ctx->phydev, MACSEC_INGR,
 800                                            secy->validate_frames != MACSEC_VALIDATE_DISABLED);
 801
 802         return vsc8584_macsec_default_flows(ctx->phydev);
 803 }
 804
 805 static int vsc8584_macsec_del_secy(struct macsec_context *ctx)
 806 {
 807         struct vsc8531_private *priv = ctx->phydev->priv;
 808         struct macsec_flow *flow, *tmp;
 809
 810         /* No operation to perform before the commit step */
 811         if (ctx->prepare)
 812                 return 0;
 813
 814         list_for_each_entry_safe(flow, tmp, &priv->macsec_flows, list)
 815                 vsc8584_macsec_del_flow(ctx->phydev, flow);
 816
 817         vsc8584_macsec_flow_default_action(ctx->phydev, MACSEC_EGR, false);
 818         vsc8584_macsec_flow_default_action(ctx->phydev, MACSEC_INGR, false);
 819
 820         priv->secy = NULL;
 821         return 0;
 822 }
 823
 824 static int vsc8584_macsec_upd_secy(struct macsec_context *ctx)
 825 {
 826         /* No operation to perform before the commit step */
 827         if (ctx->prepare)
 828                 return 0;
 829
 830         vsc8584_macsec_del_secy(ctx);
 831         return vsc8584_macsec_add_secy(ctx);
 832 }
 833
 834 static int vsc8584_macsec_add_rxsc(struct macsec_context *ctx)
 835 {
 836         /* Nothing to do */
 837         return 0;
 838 }
 839
 840 static int vsc8584_macsec_upd_rxsc(struct macsec_context *ctx)
 841 {
 842         return -EOPNOTSUPP;
 843 }
 844
 845 static int vsc8584_macsec_del_rxsc(struct macsec_context *ctx)
 846 {
 847         struct vsc8531_private *priv = ctx->phydev->priv;
 848         struct macsec_flow *flow, *tmp;
 849
 850         /* No operation to perform before the commit step */
 851         if (ctx->prepare)
 852                 return 0;
 853
 854         list_for_each_entry_safe(flow, tmp, &priv->macsec_flows, list) {
 855                 if (flow->bank == MACSEC_INGR && flow->rx_sa &&
 856                     flow->rx_sa->sc->sci == ctx->rx_sc->sci)
 857                         vsc8584_macsec_del_flow(ctx->phydev, flow);
 858         }
 859
 860         return 0;
 861 }
 862
 863 static int vsc8584_macsec_add_rxsa(struct macsec_context *ctx)
 864 {
 865         struct macsec_flow *flow = NULL;
 866
 867         if (ctx->prepare)
 868                 return __vsc8584_macsec_add_rxsa(ctx, flow, false);
 869
 870         flow = vsc8584_macsec_find_flow(ctx, MACSEC_INGR);
 871         if (IS_ERR(flow))
 872                 return PTR_ERR(flow);
 873
 874         vsc8584_macsec_flow_enable(ctx->phydev, flow);
 875         return 0;
 876 }
 877
 878 static int vsc8584_macsec_upd_rxsa(struct macsec_context *ctx)
 879 {
 880         struct macsec_flow *flow;
 881
 882         flow = vsc8584_macsec_find_flow(ctx, MACSEC_INGR);
 883         if (IS_ERR(flow))
 884                 return PTR_ERR(flow);
 885
 886         if (ctx->prepare) {
 887                 /* Make sure the flow is disabled before updating it */
 888                 vsc8584_macsec_flow_disable(ctx->phydev, flow);
 889
 890                 return __vsc8584_macsec_add_rxsa(ctx, flow, true);
 891         }
 892
 893         vsc8584_macsec_flow_enable(ctx->phydev, flow);
 894         return 0;
 895 }
 896
 897 static int vsc8584_macsec_del_rxsa(struct macsec_context *ctx)
 898 {
 899         struct macsec_flow *flow;
 900
 901         flow = vsc8584_macsec_find_flow(ctx, MACSEC_INGR);
 902
 903         if (IS_ERR(flow))
 904                 return PTR_ERR(flow);
 905         if (ctx->prepare)
 906                 return 0;
 907
 908         vsc8584_macsec_del_flow(ctx->phydev, flow);
 909         return 0;
 910 }
 911
 912 static int vsc8584_macsec_add_txsa(struct macsec_context *ctx)
 913 {
 914         struct macsec_flow *flow = NULL;
 915
 916         if (ctx->prepare)
 917                 return __vsc8584_macsec_add_txsa(ctx, flow, false);
 918
 919         flow = vsc8584_macsec_find_flow(ctx, MACSEC_EGR);
 920         if (IS_ERR(flow))
 921                 return PTR_ERR(flow);
 922
 923         vsc8584_macsec_flow_enable(ctx->phydev, flow);
 924         return 0;
 925 }
 926
 927 static int vsc8584_macsec_upd_txsa(struct macsec_context *ctx)
 928 {
 929         struct macsec_flow *flow;
 930
 931         flow = vsc8584_macsec_find_flow(ctx, MACSEC_EGR);
 932         if (IS_ERR(flow))
 933                 return PTR_ERR(flow);
 934
 935         if (ctx->prepare) {
 936                 /* Make sure the flow is disabled before updating it */
 937                 vsc8584_macsec_flow_disable(ctx->phydev, flow);
 938
 939                 return __vsc8584_macsec_add_txsa(ctx, flow, true);
 940         }
 941
 942         vsc8584_macsec_flow_enable(ctx->phydev, flow);
 943         return 0;
 944 }
 945
 946 static int vsc8584_macsec_del_txsa(struct macsec_context *ctx)
 947 {
 948         struct macsec_flow *flow;
 949
 950         flow = vsc8584_macsec_find_flow(ctx, MACSEC_EGR);
 951
 952         if (IS_ERR(flow))
 953                 return PTR_ERR(flow);
 954         if (ctx->prepare)
 955                 return 0;
 956
 957         vsc8584_macsec_del_flow(ctx->phydev, flow);
 958         return 0;
 959 }
 960
 961 static const struct macsec_ops vsc8584_macsec_ops = {
 962         .mdo_dev_open = vsc8584_macsec_dev_open,
 963         .mdo_dev_stop = vsc8584_macsec_dev_stop,
 964         .mdo_add_secy = vsc8584_macsec_add_secy,
 965         .mdo_upd_secy = vsc8584_macsec_upd_secy,
 966         .mdo_del_secy = vsc8584_macsec_del_secy,
 967         .mdo_add_rxsc = vsc8584_macsec_add_rxsc,
 968         .mdo_upd_rxsc = vsc8584_macsec_upd_rxsc,
 969         .mdo_del_rxsc = vsc8584_macsec_del_rxsc,
 970         .mdo_add_rxsa = vsc8584_macsec_add_rxsa,
 971         .mdo_upd_rxsa = vsc8584_macsec_upd_rxsa,
 972         .mdo_del_rxsa = vsc8584_macsec_del_rxsa,
 973         .mdo_add_txsa = vsc8584_macsec_add_txsa,
 974         .mdo_upd_txsa = vsc8584_macsec_upd_txsa,
 975         .mdo_del_txsa = vsc8584_macsec_del_txsa,
 976 };
 977
 978 int vsc8584_macsec_init(struct phy_device *phydev)
 979 {
 980         struct vsc8531_private *vsc8531 = phydev->priv;
 981
 982         switch (phydev->phy_id & phydev->drv->phy_id_mask) {
 983         case PHY_ID_VSC856X:
 984         case PHY_ID_VSC8582:
 985         case PHY_ID_VSC8584:
 986                 INIT_LIST_HEAD(&vsc8531->macsec_flows);
 987                 vsc8531->secy = NULL;
 988
 989                 phydev->macsec_ops = &vsc8584_macsec_ops;
 990
 991                 return __vsc8584_macsec_init(phydev);
 992         }
 993
 994         return 0;
 995 }
 996
 997 void vsc8584_handle_macsec_interrupt(struct phy_device *phydev)
 998 {
 999         struct vsc8531_private *priv = phydev->priv;
1000         struct macsec_flow *flow, *tmp;
1001         u32 cause, rec;
1002
1003         /* Check MACsec PN rollover */
1004         cause = vsc8584_macsec_phy_read(phydev, MACSEC_EGR,
1005                                         MSCC_MS_INTR_CTRL_STATUS);
1006         cause &= MSCC_MS_INTR_CTRL_STATUS_INTR_CLR_STATUS_M;
1007         if (!(cause & MACSEC_INTR_CTRL_STATUS_ROLLOVER))
1008                 return;
1009
1010         rec = 6 + priv->secy->key_len / sizeof(u32);
1011         list_for_each_entry_safe(flow, tmp, &priv->macsec_flows, list) {
1012                 u32 val;
1013
1014                 if (flow->bank != MACSEC_EGR || !flow->has_transformation)
1015                         continue;
1016
1017                 val = vsc8584_macsec_phy_read(phydev, MACSEC_EGR,
1018                                               MSCC_MS_XFORM_REC(flow->index, rec));
1019                 if (val == 0xffffffff) {
1020                         vsc8584_macsec_flow_disable(phydev, flow);
1021                         macsec_pn_wrapped(priv->secy, flow->tx_sa);
1022                         return;
1023                 }
1024         }
1025 }
1026
1027 void vsc8584_config_macsec_intr(struct phy_device *phydev)
1028 {
1029         phy_write(phydev, MSCC_EXT_PAGE_ACCESS, MSCC_PHY_PAGE_EXTENDED_2);
1030         phy_write(phydev, MSCC_PHY_EXTENDED_INT, MSCC_PHY_EXTENDED_INT_MS_EGR);
1031         phy_write(phydev, MSCC_EXT_PAGE_ACCESS, MSCC_PHY_PAGE_STANDARD);
1032
1033         vsc8584_macsec_phy_write(phydev, MACSEC_EGR, MSCC_MS_AIC_CTRL, 0xf);
1034         vsc8584_macsec_phy_write(phydev, MACSEC_EGR, MSCC_MS_INTR_CTRL_STATUS,
1035                                  MSCC_MS_INTR_CTRL_STATUS_INTR_ENABLE(MACSEC_INTR_CTRL_STATUS_ROLLOVER));
1036 }