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 ethqsets, 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         /*
  53          * We need to reserve an Ingress Queue for the Asynchronous Firmware
  54          * Event Queue.
  55          *
  56          * For each Queue Set, we'll need the ability to allocate two Egress
  57          * Contexts -- one for the Ingress Queue Free List and one for the TX
  58          * Ethernet Queue.
  59          */
  60         ethqsets = vfres->niqflint - 1;
  61         if (vfres->nethctrl != ethqsets)
  62                 ethqsets = min(vfres->nethctrl, ethqsets);
  63         if (vfres->neq < ethqsets * 2)
  64                 ethqsets = vfres->neq / 2;
  65         if (ethqsets > MAX_ETH_QSETS)
  66                 ethqsets = MAX_ETH_QSETS;
  67         adapter->sge.max_ethqsets = ethqsets;
  68
  69         if (adapter->sge.max_ethqsets < adapter->params.nports) {
  70                 dev_warn(adapter->pdev_dev, "only using %d of %d available"
  71                          " virtual interfaces (too few Queue Sets)\n",
  72                          adapter->sge.max_ethqsets, adapter->params.nports);
  73                 adapter->params.nports = adapter->sge.max_ethqsets;
  74         }
  75 }
  76
  77 static int adap_init0vf(struct adapter *adapter)
  78 {
  79         u32 param, val = 0;
  80         int err;
  81
  82         err = t4vf_fw_reset(adapter);
  83         if (err < 0) {
  84                 dev_err(adapter->pdev_dev, "FW reset failed: err=%d\n", err);
  85                 return err;
  86         }
  87
  88         /*
  89          * Grab basic operational parameters.  These will predominantly have
  90          * been set up by the Physical Function Driver or will be hard coded
  91          * into the adapter.  We just have to live with them ...  Note that
  92          * we _must_ get our VPD parameters before our SGE parameters because
  93          * we need to know the adapter's core clock from the VPD in order to
  94          * properly decode the SGE Timer Values.
  95          */
  96         err = t4vf_get_dev_params(adapter);
  97         if (err) {
  98                 dev_err(adapter->pdev_dev, "unable to retrieve adapter"
  99                         " device parameters: err=%d\n", err);
 100                 return err;
 101         }
 102
 103         err = t4vf_get_vpd_params(adapter);
 104         if (err) {
 105                 dev_err(adapter->pdev_dev, "unable to retrieve adapter"
 106                         " VPD parameters: err=%d\n", err);
 107                 return err;
 108         }
 109
 110         adapter->pf = t4vf_get_pf_from_vf(adapter);
 111         err = t4vf_sge_init(adapter);
 112         if (err) {
 113                 dev_err(adapter->pdev_dev, "error in sge init\n");
 114                 return err;
 115         }
 116
 117         err = t4vf_get_rss_glb_config(adapter);
 118         if (err) {
 119                 dev_err(adapter->pdev_dev, "unable to retrieve adapter"
 120                         " RSS parameters: err=%d\n", err);
 121                 return err;
 122         }
 123         if (adapter->params.rss.mode !=
 124             FW_RSS_GLB_CONFIG_CMD_MODE_BASICVIRTUAL) {
 125                 dev_err(adapter->pdev_dev, "unable to operate with global RSS"
 126                         " mode %d\n", adapter->params.rss.mode);
 127                 return -EINVAL;
 128         }
 129
 130         /* If we're running on newer firmware, let it know that we're
 131          * prepared to deal with encapsulated CPL messages.  Older
 132          * firmware won't understand this and we'll just get
 133          * unencapsulated messages ...
 134          */
 135         param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_PFVF) |
 136                 V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_PFVF_CPLFW4MSG_ENCAP);
 137         val = 1;
 138         t4vf_set_params(adapter, 1, &param, &val);
 139
 140         /*
 141          * Grab our Virtual Interface resource allocation, extract the
 142          * features that we're interested in and do a bit of sanity testing on
 143          * what we discover.
 144          */
 145         err = t4vf_get_vfres(adapter);
 146         if (err) {
 147                 dev_err(adapter->pdev_dev, "unable to get virtual interface"
 148                         " resources: err=%d\n", err);
 149                 return err;
 150         }
 151
 152         /*
 153          * Check for various parameter sanity issues.
 154          */
 155         if (adapter->params.vfres.pmask == 0) {
 156                 dev_err(adapter->pdev_dev, "no port access configured\n"
 157                         "usable!\n");
 158                 return -EINVAL;
 159         }
 160         if (adapter->params.vfres.nvi == 0) {
 161                 dev_err(adapter->pdev_dev, "no virtual interfaces configured/"
 162                         "usable!\n");
 163                 return -EINVAL;
 164         }
 165
 166         /*
 167          * Initialize nports and max_ethqsets now that we have our Virtual
 168          * Function Resources.
 169          */
 170         size_nports_qsets(adapter);
 171         adapter->flags |= FW_OK;
 172         return 0;
 173 }
 174
 175 int cxgbevf_probe(struct adapter *adapter)
 176 {
 177         struct port_info *pi;
 178         unsigned int pmask;
 179         int err = 0;
 180         int i;
 181
 182         t4_os_lock_init(&adapter->mbox_lock);
 183         TAILQ_INIT(&adapter->mbox_list);
 184         err = t4vf_prep_adapter(adapter);
 185         if (err)
 186                 return err;
 187
 188         if (!is_t4(adapter->params.chip)) {
 189                 adapter->bar2 = (void *)adapter->pdev->mem_resource[2].addr;
 190                 if (!adapter->bar2) {
 191                         dev_err(adapter, "cannot map device bar2 region\n");
 192                         err = -ENOMEM;
 193                         return err;
 194                 }
 195         }
 196
 197         err = adap_init0vf(adapter);
 198         if (err) {
 199                 dev_err(adapter, "%s: Adapter initialization failed, error %d\n",
 200                                 __func__, err);
 201                 goto out_free;
 202         }
 203
 204         pmask = adapter->params.vfres.pmask;
 205         for_each_port(adapter, i) {
 206                 const unsigned int numa_node = rte_socket_id();
 207                 char name[RTE_ETH_NAME_MAX_LEN];
 208                 struct rte_eth_dev *eth_dev;
 209                 int port_id;
 210
 211                 if (pmask == 0)
 212                         break;
 213                 port_id = ffs(pmask) - 1;
 214                 pmask &= ~(1 << port_id);
 215
 216                 snprintf(name, sizeof(name), "%s_%d",
 217                          adapter->pdev->device.name, i);
 218
 219                 if (i == 0) {
 220                         /* First port is already allocated by DPDK */
 221                         eth_dev = adapter->eth_dev;
 222                         goto allocate_mac;
 223                 }
 224
 225                 /*
 226                  * now do all data allocation - for eth_dev structure,
 227                  * and internal (private) data for the remaining ports
 228                  */
 229
 230                 /* reserve an ethdev entry */
 231                 eth_dev = rte_eth_dev_allocate(name);
 232                 if (!eth_dev) {
 233                         err = -ENOMEM;
 234                         goto out_free;
 235                 }
 236                 eth_dev->data->dev_private =
 237                         rte_zmalloc_socket(name, sizeof(struct port_info),
 238                                            RTE_CACHE_LINE_SIZE, numa_node);
 239                 if (!eth_dev->data->dev_private)
 240                         goto out_free;
 241
 242 allocate_mac:
 243                 pi = (struct port_info *)eth_dev->data->dev_private;
 244                 adapter->port[i] = pi;
 245                 pi->eth_dev = eth_dev;
 246                 pi->adapter = adapter;
 247                 pi->xact_addr_filt = -1;
 248                 pi->port_id = port_id;
 249                 pi->pidx = i;
 250
 251                 pi->eth_dev->device = &adapter->pdev->device;
 252                 pi->eth_dev->dev_ops = adapter->eth_dev->dev_ops;
 253                 pi->eth_dev->tx_pkt_burst = adapter->eth_dev->tx_pkt_burst;
 254                 pi->eth_dev->rx_pkt_burst = adapter->eth_dev->rx_pkt_burst;
 255
 256                 rte_eth_copy_pci_info(pi->eth_dev, adapter->pdev);
 257                 pi->eth_dev->data->mac_addrs = rte_zmalloc(name,
 258                                                            ETHER_ADDR_LEN, 0);
 259                 if (!pi->eth_dev->data->mac_addrs) {
 260                         dev_err(adapter, "%s: Mem allocation failed for storing mac addr, aborting\n",
 261                                 __func__);
 262                         err = -ENOMEM;
 263                         goto out_free;
 264                 }
 265         }
 266
 267         if (adapter->flags & FW_OK) {
 268                 err = t4vf_port_init(adapter);
 269                 if (err) {
 270                         dev_err(adapter, "%s: t4_port_init failed with err %d\n",
 271                                 __func__, err);
 272                         goto out_free;
 273                 }
 274         }
 275
 276         cfg_queues(adapter->eth_dev);
 277         print_adapter_info(adapter);
 278         print_port_info(adapter);
 279
 280         err = init_rss(adapter);
 281         if (err)
 282                 goto out_free;
 283         return 0;
 284
 285 out_free:
 286         for_each_port(adapter, i) {
 287                 pi = adap2pinfo(adapter, i);
 288                 if (pi->viid != 0)
 289                         t4_free_vi(adapter, adapter->mbox, adapter->pf,
 290                                    0, pi->viid);
 291                 /* Skip first port since it'll be de-allocated by DPDK */
 292                 if (i == 0)
 293                         continue;
 294                 if (pi->eth_dev) {
 295                         if (pi->eth_dev->data->dev_private)
 296                                 rte_free(pi->eth_dev->data->dev_private);
 297                         rte_eth_dev_release_port(pi->eth_dev);
 298                 }
 299         }
 300         return -err;
 301 }