drivers/net/ethernet/microchip/sparx5/sparx5_vlan.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /* Microchip Sparx5 Switch driver
   3  *
   4  * Copyright (c) 2021 Microchip Technology Inc. and its subsidiaries.
   5  */
   6
   7 #include "sparx5_main_regs.h"
   8 #include "sparx5_main.h"
   9
  10 static int sparx5_vlant_set_mask(struct sparx5 *sparx5, u16 vid)
  11 {
  12         u32 mask[3];
  13
  14         /* Divide up mask in 32 bit words */
  15         bitmap_to_arr32(mask, sparx5->vlan_mask[vid], SPX5_PORTS);
  16
  17         /* Output mask to respective registers */
  18         spx5_wr(mask[0], sparx5, ANA_L3_VLAN_MASK_CFG(vid));
  19         spx5_wr(mask[1], sparx5, ANA_L3_VLAN_MASK_CFG1(vid));
  20         spx5_wr(mask[2], sparx5, ANA_L3_VLAN_MASK_CFG2(vid));
  21
  22         return 0;
  23 }
  24
  25 void sparx5_vlan_init(struct sparx5 *sparx5)
  26 {
  27         u16 vid;
  28
  29         spx5_rmw(ANA_L3_VLAN_CTRL_VLAN_ENA_SET(1),
  30                  ANA_L3_VLAN_CTRL_VLAN_ENA,
  31                  sparx5,
  32                  ANA_L3_VLAN_CTRL);
  33
  34         /* Map VLAN = FID */
  35         for (vid = NULL_VID; vid < VLAN_N_VID; vid++)
  36                 spx5_rmw(ANA_L3_VLAN_CFG_VLAN_FID_SET(vid),
  37                          ANA_L3_VLAN_CFG_VLAN_FID,
  38                          sparx5,
  39                          ANA_L3_VLAN_CFG(vid));
  40 }
  41
  42 void sparx5_vlan_port_setup(struct sparx5 *sparx5, int portno)
  43 {
  44         struct sparx5_port *port = sparx5->ports[portno];
  45
  46         /* Configure PVID */
  47         spx5_rmw(ANA_CL_VLAN_CTRL_VLAN_AWARE_ENA_SET(0) |
  48                  ANA_CL_VLAN_CTRL_PORT_VID_SET(port->pvid),
  49                  ANA_CL_VLAN_CTRL_VLAN_AWARE_ENA |
  50                  ANA_CL_VLAN_CTRL_PORT_VID,
  51                  sparx5,
  52                  ANA_CL_VLAN_CTRL(port->portno));
  53 }
  54
  55 int sparx5_vlan_vid_add(struct sparx5_port *port, u16 vid, bool pvid,
  56                         bool untagged)
  57 {
  58         struct sparx5 *sparx5 = port->sparx5;
  59         int ret;
  60
  61         /* Untagged egress vlan classification */
  62         if (untagged && port->vid != vid) {
  63                 if (port->vid) {
  64                         netdev_err(port->ndev,
  65                                    "Port already has a native VLAN: %d\n",
  66                                    port->vid);
  67                         return -EBUSY;
  68                 }
  69                 port->vid = vid;
  70         }
  71
  72         /* Make the port a member of the VLAN */
  73         set_bit(port->portno, sparx5->vlan_mask[vid]);
  74         ret = sparx5_vlant_set_mask(sparx5, vid);
  75         if (ret)
  76                 return ret;
  77
  78         /* Default ingress vlan classification */
  79         if (pvid)
  80                 port->pvid = vid;
  81
  82         sparx5_vlan_port_apply(sparx5, port);
  83
  84         return 0;
  85 }
  86
  87 int sparx5_vlan_vid_del(struct sparx5_port *port, u16 vid)
  88 {
  89         struct sparx5 *sparx5 = port->sparx5;
  90         int ret;
  91
  92         /* 8021q removes VID 0 on module unload for all interfaces
  93          * with VLAN filtering feature. We need to keep it to receive
  94          * untagged traffic.
  95          */
  96         if (vid == 0)
  97                 return 0;
  98
  99         /* Stop the port from being a member of the vlan */
 100         clear_bit(port->portno, sparx5->vlan_mask[vid]);
 101         ret = sparx5_vlant_set_mask(sparx5, vid);
 102         if (ret)
 103                 return ret;
 104
 105         /* Ingress */
 106         if (port->pvid == vid)
 107                 port->pvid = 0;
 108
 109         /* Egress */
 110         if (port->vid == vid)
 111                 port->vid = 0;
 112
 113         sparx5_vlan_port_apply(sparx5, port);
 114
 115         return 0;
 116 }
 117
 118 void sparx5_pgid_update_mask(struct sparx5_port *port, int pgid, bool enable)
 119 {
 120         struct sparx5 *sparx5 = port->sparx5;
 121         u32 val, mask;
 122
 123         /* mask is spread across 3 registers x 32 bit */
 124         if (port->portno < 32) {
 125                 mask = BIT(port->portno);
 126                 val = enable ? mask : 0;
 127                 spx5_rmw(val, mask, sparx5, ANA_AC_PGID_CFG(pgid));
 128         } else if (port->portno < 64) {
 129                 mask = BIT(port->portno - 32);
 130                 val = enable ? mask : 0;
 131                 spx5_rmw(val, mask, sparx5, ANA_AC_PGID_CFG1(pgid));
 132         } else if (port->portno < SPX5_PORTS) {
 133                 mask = BIT(port->portno - 64);
 134                 val = enable ? mask : 0;
 135                 spx5_rmw(val, mask, sparx5, ANA_AC_PGID_CFG2(pgid));
 136         } else {
 137                 netdev_err(port->ndev, "Invalid port no: %d\n", port->portno);
 138         }
 139 }
 140
 141 void sparx5_update_fwd(struct sparx5 *sparx5)
 142 {
 143         DECLARE_BITMAP(workmask, SPX5_PORTS);
 144         u32 mask[3];
 145         int port;
 146
 147         /* Divide up fwd mask in 32 bit words */
 148         bitmap_to_arr32(mask, sparx5->bridge_fwd_mask, SPX5_PORTS);
 149
 150         /* Update flood masks */
 151         for (port = PGID_UC_FLOOD; port <= PGID_BCAST; port++) {
 152                 spx5_wr(mask[0], sparx5, ANA_AC_PGID_CFG(port));
 153                 spx5_wr(mask[1], sparx5, ANA_AC_PGID_CFG1(port));
 154                 spx5_wr(mask[2], sparx5, ANA_AC_PGID_CFG2(port));
 155         }
 156
 157         /* Update SRC masks */
 158         for (port = 0; port < SPX5_PORTS; port++) {
 159                 if (test_bit(port, sparx5->bridge_fwd_mask)) {
 160                         /* Allow to send to all bridged but self */
 161                         bitmap_copy(workmask, sparx5->bridge_fwd_mask, SPX5_PORTS);
 162                         clear_bit(port, workmask);
 163                         bitmap_to_arr32(mask, workmask, SPX5_PORTS);
 164                         spx5_wr(mask[0], sparx5, ANA_AC_SRC_CFG(port));
 165                         spx5_wr(mask[1], sparx5, ANA_AC_SRC_CFG1(port));
 166                         spx5_wr(mask[2], sparx5, ANA_AC_SRC_CFG2(port));
 167                 } else {
 168                         spx5_wr(0, sparx5, ANA_AC_SRC_CFG(port));
 169                         spx5_wr(0, sparx5, ANA_AC_SRC_CFG1(port));
 170                         spx5_wr(0, sparx5, ANA_AC_SRC_CFG2(port));
 171                 }
 172         }
 173
 174         /* Learning enabled only for bridged ports */
 175         bitmap_and(workmask, sparx5->bridge_fwd_mask,
 176                    sparx5->bridge_lrn_mask, SPX5_PORTS);
 177         bitmap_to_arr32(mask, workmask, SPX5_PORTS);
 178
 179         /* Apply learning mask */
 180         spx5_wr(mask[0], sparx5, ANA_L2_AUTO_LRN_CFG);
 181         spx5_wr(mask[1], sparx5, ANA_L2_AUTO_LRN_CFG1);
 182         spx5_wr(mask[2], sparx5, ANA_L2_AUTO_LRN_CFG2);
 183 }
 184
 185 void sparx5_vlan_port_apply(struct sparx5 *sparx5,
 186                             struct sparx5_port *port)
 187
 188 {
 189         u32 val;
 190
 191         /* Configure PVID, vlan aware */
 192         val = ANA_CL_VLAN_CTRL_VLAN_AWARE_ENA_SET(port->vlan_aware) |
 193                 ANA_CL_VLAN_CTRL_VLAN_POP_CNT_SET(port->vlan_aware) |
 194                 ANA_CL_VLAN_CTRL_PORT_VID_SET(port->pvid);
 195         spx5_wr(val, sparx5, ANA_CL_VLAN_CTRL(port->portno));
 196
 197         val = 0;
 198         if (port->vlan_aware && !port->pvid)
 199                 /* If port is vlan-aware and tagged, drop untagged and
 200                  * priority tagged frames.
 201                  */
 202                 val = ANA_CL_VLAN_FILTER_CTRL_TAG_REQUIRED_ENA_SET(1) |
 203                         ANA_CL_VLAN_FILTER_CTRL_PRIO_CTAG_DIS_SET(1) |
 204                         ANA_CL_VLAN_FILTER_CTRL_PRIO_STAG_DIS_SET(1);
 205         spx5_wr(val, sparx5,
 206                 ANA_CL_VLAN_FILTER_CTRL(port->portno, 0));
 207
 208         /* Egress configuration (REW_TAG_CFG): VLAN tag type to 8021Q */
 209         val = REW_TAG_CTRL_TAG_TPID_CFG_SET(0);
 210         if (port->vlan_aware) {
 211                 if (port->vid)
 212                         /* Tag all frames except when VID == DEFAULT_VLAN */
 213                         val |= REW_TAG_CTRL_TAG_CFG_SET(1);
 214                 else
 215                         val |= REW_TAG_CTRL_TAG_CFG_SET(3);
 216         }
 217         spx5_wr(val, sparx5, REW_TAG_CTRL(port->portno));
 218
 219         /* Egress VID */
 220         spx5_rmw(REW_PORT_VLAN_CFG_PORT_VID_SET(port->vid),
 221                  REW_PORT_VLAN_CFG_PORT_VID,
 222                  sparx5,
 223                  REW_PORT_VLAN_CFG(port->portno));
 224 }