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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 | /* * Handling of a master device, switching frames via its switch fabric CPU port * * Copyright (c) 2017 Savoir-faire Linux Inc. * Vivien Didelot <vivien.didelot@savoirfairelinux.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #include "dsa_priv.h" static void dsa_master_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, uint64_t *data) { struct dsa_port *cpu_dp = dev->dsa_ptr; const struct ethtool_ops *ops = cpu_dp->orig_ethtool_ops; struct dsa_switch *ds = cpu_dp->ds; int port = cpu_dp->index; int count = 0; if (ops->get_sset_count && ops->get_ethtool_stats) { count = ops->get_sset_count(dev, ETH_SS_STATS); ops->get_ethtool_stats(dev, stats, data); } if (ds->ops->get_ethtool_stats) ds->ops->get_ethtool_stats(ds, port, data + count); } static void dsa_master_get_ethtool_phy_stats(struct net_device *dev, struct ethtool_stats *stats, uint64_t *data) { struct dsa_port *cpu_dp = dev->dsa_ptr; const struct ethtool_ops *ops = cpu_dp->orig_ethtool_ops; struct dsa_switch *ds = cpu_dp->ds; int port = cpu_dp->index; int count = 0; if (dev->phydev && !ops->get_ethtool_phy_stats) { count = phy_ethtool_get_sset_count(dev->phydev); if (count >= 0) phy_ethtool_get_stats(dev->phydev, stats, data); } else if (ops->get_sset_count && ops->get_ethtool_phy_stats) { count = ops->get_sset_count(dev, ETH_SS_PHY_STATS); ops->get_ethtool_phy_stats(dev, stats, data); } if (count < 0) count = 0; if (ds->ops->get_ethtool_phy_stats) ds->ops->get_ethtool_phy_stats(ds, port, data + count); } static int dsa_master_get_sset_count(struct net_device *dev, int sset) { struct dsa_port *cpu_dp = dev->dsa_ptr; const struct ethtool_ops *ops = cpu_dp->orig_ethtool_ops; struct dsa_switch *ds = cpu_dp->ds; int count = 0; if (sset == ETH_SS_PHY_STATS && dev->phydev && !ops->get_ethtool_phy_stats) count = phy_ethtool_get_sset_count(dev->phydev); else if (ops->get_sset_count) count = ops->get_sset_count(dev, sset); if (count < 0) count = 0; if (ds->ops->get_sset_count) count += ds->ops->get_sset_count(ds, cpu_dp->index, sset); return count; } static void dsa_master_get_strings(struct net_device *dev, uint32_t stringset, uint8_t *data) { struct dsa_port *cpu_dp = dev->dsa_ptr; const struct ethtool_ops *ops = cpu_dp->orig_ethtool_ops; struct dsa_switch *ds = cpu_dp->ds; int port = cpu_dp->index; int len = ETH_GSTRING_LEN; int mcount = 0, count; unsigned int i; uint8_t pfx[4]; uint8_t *ndata; snprintf(pfx, sizeof(pfx), "p%.2d", port); /* We do not want to be NULL-terminated, since this is a prefix */ pfx[sizeof(pfx) - 1] = '_'; if (stringset == ETH_SS_PHY_STATS && dev->phydev && !ops->get_ethtool_phy_stats) { mcount = phy_ethtool_get_sset_count(dev->phydev); if (mcount < 0) mcount = 0; else phy_ethtool_get_strings(dev->phydev, data); } else if (ops->get_sset_count && ops->get_strings) { mcount = ops->get_sset_count(dev, stringset); if (mcount < 0) mcount = 0; ops->get_strings(dev, stringset, data); } if (ds->ops->get_strings) { ndata = data + mcount * len; /* This function copies ETH_GSTRINGS_LEN bytes, we will mangle * the output after to prepend our CPU port prefix we * constructed earlier */ ds->ops->get_strings(ds, port, stringset, ndata); count = ds->ops->get_sset_count(ds, port, stringset); for (i = 0; i < count; i++) { memmove(ndata + (i * len + sizeof(pfx)), ndata + i * len, len - sizeof(pfx)); memcpy(ndata + i * len, pfx, sizeof(pfx)); } } } static int dsa_master_ethtool_setup(struct net_device *dev) { struct dsa_port *cpu_dp = dev->dsa_ptr; struct dsa_switch *ds = cpu_dp->ds; struct ethtool_ops *ops; ops = devm_kzalloc(ds->dev, sizeof(*ops), GFP_KERNEL); if (!ops) return -ENOMEM; cpu_dp->orig_ethtool_ops = dev->ethtool_ops; if (cpu_dp->orig_ethtool_ops) memcpy(ops, cpu_dp->orig_ethtool_ops, sizeof(*ops)); ops->get_sset_count = dsa_master_get_sset_count; ops->get_ethtool_stats = dsa_master_get_ethtool_stats; ops->get_strings = dsa_master_get_strings; ops->get_ethtool_phy_stats = dsa_master_get_ethtool_phy_stats; dev->ethtool_ops = ops; return 0; } static void dsa_master_ethtool_teardown(struct net_device *dev) { struct dsa_port *cpu_dp = dev->dsa_ptr; dev->ethtool_ops = cpu_dp->orig_ethtool_ops; cpu_dp->orig_ethtool_ops = NULL; } static struct lock_class_key dsa_master_addr_list_lock_key; int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp) { /* If we use a tagging format that doesn't have an ethertype * field, make sure that all packets from this point on get * sent to the tag format's receive function. */ wmb(); dev->dsa_ptr = cpu_dp; lockdep_set_class(&dev->addr_list_lock, &dsa_master_addr_list_lock_key); return dsa_master_ethtool_setup(dev); } void dsa_master_teardown(struct net_device *dev) { dsa_master_ethtool_teardown(dev); dev->dsa_ptr = NULL; /* If we used a tagging format that doesn't have an ethertype * field, make sure that all packets from this point get sent * without the tag and go through the regular receive path. */ wmb(); } |