drivers/net/cxgbe/cxgbevf_main.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2018 Chelsio Communications.
   3  * All rights reserved.
   4  */
   5
   6 #include <rte_ethdev_driver.h>
   7 #include <rte_ethdev_pci.h>
   8 #include <rte_malloc.h>
   9
  10 #include "common.h"
  11 #include "t4_regs.h"
  12 #include "t4_msg.h"
  13 #include "cxgbe.h"
  14
  15 /*
  16  * Figure out how many Ports and Queue Sets we can support.  This depends on
  17  * knowing our Virtual Function Resources and may be called a second time if
  18  * we fall back from MSI-X to MSI Interrupt Mode.
  19  */
  20 static void size_nports_qsets(struct adapter *adapter)
  21 {
  22         struct vf_resources *vfres = &adapter->params.vfres;
  23         unsigned int pmask_nports;
  24
  25         /*
  26          * The number of "ports" which we support is equal to the number of
  27          * Virtual Interfaces with which we've been provisioned.
  28          */
  29         adapter->params.nports = vfres->nvi;
  30         if (adapter->params.nports > MAX_NPORTS) {
  31                 dev_warn(adapter->pdev_dev, "only using %d of %d maximum"
  32                          " allowed virtual interfaces\n", MAX_NPORTS,
  33                          adapter->params.nports);
  34                 adapter->params.nports = MAX_NPORTS;
  35         }
  36
  37         /*
  38          * We may have been provisioned with more VIs than the number of
  39          * ports we're allowed to access (our Port Access Rights Mask).
  40          * This is obviously a configuration conflict but we don't want to
  41          * do anything silly just because of that.
  42          */
  43         pmask_nports = hweight32(adapter->params.vfres.pmask);
  44         if (pmask_nports < adapter->params.nports) {
  45                 dev_warn(adapter->pdev_dev, "only using %d of %d provissioned"
  46                          " virtual interfaces; limited by Port Access Rights"
  47                          " mask %#x\n", pmask_nports, adapter->params.nports,
  48                          adapter->params.vfres.pmask);
  49                 adapter->params.nports = pmask_nports;
  50         }
  51
  52         configure_max_ethqsets(adapter);
  53         if (adapter->sge.max_ethqsets < adapter->params.nports) {
  54                 dev_warn(adapter->pdev_dev, "only using %d of %d available"
  55                          " virtual interfaces (too few Queue Sets)\n",
  56                          adapter->sge.max_ethqsets, adapter->params.nports);
  57                 adapter->params.nports = adapter->sge.max_ethqsets;
  58         }
  59 }
  60
  61 void cxgbevf_stats_get(struct port_info *pi, struct port_stats *stats)
  62 {
  63         t4vf_get_port_stats(pi->adapter, pi->pidx, stats);
  64 }
  65
  66 static int adap_init0vf(struct adapter *adapter)
  67 {
  68         u32 param, val = 0;
  69         int err;
  70
  71         err = t4vf_fw_reset(adapter);
  72         if (err < 0) {
  73                 dev_err(adapter->pdev_dev, "FW reset failed: err=%d\n", err);
  74                 return err;
  75         }
  76
  77         /*
  78          * Grab basic operational parameters.  These will predominantly have
  79          * been set up by the Physical Function Driver or will be hard coded
  80          * into the adapter.  We just have to live with them ...  Note that
  81          * we _must_ get our VPD parameters before our SGE parameters because
  82          * we need to know the adapter's core clock from the VPD in order to
  83          * properly decode the SGE Timer Values.
  84          */
  85         err = t4vf_get_dev_params(adapter);
  86         if (err) {
  87                 dev_err(adapter->pdev_dev, "unable to retrieve adapter"
  88                         " device parameters: err=%d\n", err);
  89                 return err;
  90         }
  91
  92         err = t4vf_get_vpd_params(adapter);
  93         if (err) {
  94                 dev_err(adapter->pdev_dev, "unable to retrieve adapter"
  95                         " VPD parameters: err=%d\n", err);
  96                 return err;
  97         }
  98
  99         adapter->pf = t4vf_get_pf_from_vf(adapter);
 100         err = t4vf_sge_init(adapter);
 101         if (err) {
 102                 dev_err(adapter->pdev_dev, "error in sge init\n");
 103                 return err;
 104         }
 105
 106         err = t4vf_get_rss_glb_config(adapter);
 107         if (err) {
 108                 dev_err(adapter->pdev_dev, "unable to retrieve adapter"
 109                         " RSS parameters: err=%d\n", err);
 110                 return err;
 111         }
 112         if (adapter->params.rss.mode !=
 113             FW_RSS_GLB_CONFIG_CMD_MODE_BASICVIRTUAL) {
 114                 dev_err(adapter->pdev_dev, "unable to operate with global RSS"
 115                         " mode %d\n", adapter->params.rss.mode);
 116                 return -EINVAL;
 117         }
 118
 119         /* If we're running on newer firmware, let it know that we're
 120          * prepared to deal with encapsulated CPL messages.  Older
 121          * firmware won't understand this and we'll just get
 122          * unencapsulated messages ...
 123          */
 124         param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_PFVF) |
 125                 V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_PFVF_CPLFW4MSG_ENCAP);
 126         val = 1;
 127         t4vf_set_params(adapter, 1, &param, &val);
 128
 129         /*
 130          * Grab our Virtual Interface resource allocation, extract the
 131          * features that we're interested in and do a bit of sanity testing on
 132          * what we discover.
 133          */
 134         err = t4vf_get_vfres(adapter);
 135         if (err) {
 136                 dev_err(adapter->pdev_dev, "unable to get virtual interface"
 137                         " resources: err=%d\n", err);
 138                 return err;
 139         }
 140
 141         /*
 142          * Check for various parameter sanity issues.
 143          */
 144         if (adapter->params.vfres.pmask == 0) {
 145                 dev_err(adapter->pdev_dev, "no port access configured\n"
 146                         "usable!\n");
 147                 return -EINVAL;
 148         }
 149         if (adapter->params.vfres.nvi == 0) {
 150                 dev_err(adapter->pdev_dev, "no virtual interfaces configured/"
 151                         "usable!\n");
 152                 return -EINVAL;
 153         }
 154
 155         /*
 156          * Initialize nports and max_ethqsets now that we have our Virtual
 157          * Function Resources.
 158          */
 159         size_nports_qsets(adapter);
 160         adapter->flags |= FW_OK;
 161         return 0;
 162 }
 163
 164 int cxgbevf_probe(struct adapter *adapter)
 165 {
 166         struct port_info *pi;
 167         unsigned int pmask;
 168         int err = 0;
 169         int i;
 170
 171         t4_os_lock_init(&adapter->mbox_lock);
 172         TAILQ_INIT(&adapter->mbox_list);
 173         err = t4vf_prep_adapter(adapter);
 174         if (err)
 175                 return err;
 176
 177         if (!is_t4(adapter->params.chip)) {
 178                 adapter->bar2 = (void *)adapter->pdev->mem_resource[2].addr;
 179                 if (!adapter->bar2) {
 180                         dev_err(adapter, "cannot map device bar2 region\n");
 181                         err = -ENOMEM;
 182                         return err;
 183                 }
 184         }
 185
 186         err = adap_init0vf(adapter);
 187         if (err) {
 188                 dev_err(adapter, "%s: Adapter initialization failed, error %d\n",
 189                                 __func__, err);
 190                 goto out_free;
 191         }
 192
 193         pmask = adapter->params.vfres.pmask;
 194         for_each_port(adapter, i) {
 195                 const unsigned int numa_node = rte_socket_id();
 196                 char name[RTE_ETH_NAME_MAX_LEN];
 197                 struct rte_eth_dev *eth_dev;
 198                 int port_id;
 199
 200                 if (pmask == 0)
 201                         break;
 202                 port_id = ffs(pmask) - 1;
 203                 pmask &= ~(1 << port_id);
 204
 205                 snprintf(name, sizeof(name), "%s_%d",
 206                          adapter->pdev->device.name, i);
 207
 208                 if (i == 0) {
 209                         /* First port is already allocated by DPDK */
 210                         eth_dev = adapter->eth_dev;
 211                         goto allocate_mac;
 212                 }
 213
 214                 /*
 215                  * now do all data allocation - for eth_dev structure,
 216                  * and internal (private) data for the remaining ports
 217                  */
 218
 219                 /* reserve an ethdev entry */
 220                 eth_dev = rte_eth_dev_allocate(name);
 221                 if (!eth_dev) {
 222                         err = -ENOMEM;
 223                         goto out_free;
 224                 }
 225                 eth_dev->data->dev_private =
 226                         rte_zmalloc_socket(name, sizeof(struct port_info),
 227                                            RTE_CACHE_LINE_SIZE, numa_node);
 228                 if (!eth_dev->data->dev_private)
 229                         goto out_free;
 230
 231 allocate_mac:
 232                 pi = (struct port_info *)eth_dev->data->dev_private;
 233                 adapter->port[i] = pi;
 234                 pi->eth_dev = eth_dev;
 235                 pi->adapter = adapter;
 236                 pi->xact_addr_filt = -1;
 237                 pi->port_id = port_id;
 238                 pi->pidx = i;
 239
 240                 pi->eth_dev->device = &adapter->pdev->device;
 241                 pi->eth_dev->dev_ops = adapter->eth_dev->dev_ops;
 242                 pi->eth_dev->tx_pkt_burst = adapter->eth_dev->tx_pkt_burst;
 243                 pi->eth_dev->rx_pkt_burst = adapter->eth_dev->rx_pkt_burst;
 244
 245                 rte_eth_copy_pci_info(pi->eth_dev, adapter->pdev);
 246                 pi->eth_dev->data->mac_addrs = rte_zmalloc(name,
 247                                                            ETHER_ADDR_LEN, 0);
 248                 if (!pi->eth_dev->data->mac_addrs) {
 249                         dev_err(adapter, "%s: Mem allocation failed for storing mac addr, aborting\n",
 250                                 __func__);
 251                         err = -ENOMEM;
 252                         goto out_free;
 253                 }
 254
 255                 if (i > 0) {
 256                         /* First port will be notified by upper layer */
 257                         rte_eth_dev_probing_finish(eth_dev);
 258                 }
 259         }
 260
 261         if (adapter->flags & FW_OK) {
 262                 err = t4vf_port_init(adapter);
 263                 if (err) {
 264                         dev_err(adapter, "%s: t4_port_init failed with err %d\n",
 265                                 __func__, err);
 266                         goto out_free;
 267                 }
 268         }
 269
 270         cfg_queues(adapter->eth_dev);
 271         print_adapter_info(adapter);
 272         print_port_info(adapter);
 273
 274         err = init_rss(adapter);
 275         if (err)
 276                 goto out_free;
 277         return 0;
 278
 279 out_free:
 280         for_each_port(adapter, i) {
 281                 pi = adap2pinfo(adapter, i);
 282                 if (pi->viid != 0)
 283                         t4_free_vi(adapter, adapter->mbox, adapter->pf,
 284                                    0, pi->viid);
 285                 rte_eth_dev_release_port(pi->eth_dev);
 286         }
 287         return -err;
 288 }