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
 112         /* If we're running on newer firmware, let it know that we're
 113          * prepared to deal with encapsulated CPL messages.  Older
 114          * firmware won't understand this and we'll just get
 115          * unencapsulated messages ...
 116          */
 117         param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_PFVF) |
 118                 V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_PFVF_CPLFW4MSG_ENCAP);
 119         val = 1;
 120         t4vf_set_params(adapter, 1, &param, &val);
 121
 122         /*
 123          * Grab our Virtual Interface resource allocation, extract the
 124          * features that we're interested in and do a bit of sanity testing on
 125          * what we discover.
 126          */
 127         err = t4vf_get_vfres(adapter);
 128         if (err) {
 129                 dev_err(adapter->pdev_dev, "unable to get virtual interface"
 130                         " resources: err=%d\n", err);
 131                 return err;
 132         }
 133
 134         /*
 135          * Check for various parameter sanity issues.
 136          */
 137         if (adapter->params.vfres.pmask == 0) {
 138                 dev_err(adapter->pdev_dev, "no port access configured\n"
 139                         "usable!\n");
 140                 return -EINVAL;
 141         }
 142         if (adapter->params.vfres.nvi == 0) {
 143                 dev_err(adapter->pdev_dev, "no virtual interfaces configured/"
 144                         "usable!\n");
 145                 return -EINVAL;
 146         }
 147
 148         /*
 149          * Initialize nports and max_ethqsets now that we have our Virtual
 150          * Function Resources.
 151          */
 152         size_nports_qsets(adapter);
 153         adapter->flags |= FW_OK;
 154         return 0;
 155 }
 156
 157 int cxgbevf_probe(struct adapter *adapter)
 158 {
 159         struct port_info *pi;
 160         unsigned int pmask;
 161         int err = 0;
 162         int i;
 163
 164         t4_os_lock_init(&adapter->mbox_lock);
 165         TAILQ_INIT(&adapter->mbox_list);
 166         err = t4vf_prep_adapter(adapter);
 167         if (err)
 168                 return err;
 169
 170         if (!is_t4(adapter->params.chip)) {
 171                 adapter->bar2 = (void *)adapter->pdev->mem_resource[2].addr;
 172                 if (!adapter->bar2) {
 173                         dev_err(adapter, "cannot map device bar2 region\n");
 174                         err = -ENOMEM;
 175                         return err;
 176                 }
 177         }
 178
 179         err = adap_init0vf(adapter);
 180         if (err) {
 181                 dev_err(adapter, "%s: Adapter initialization failed, error %d\n",
 182                                 __func__, err);
 183                 goto out_free;
 184         }
 185
 186         pmask = adapter->params.vfres.pmask;
 187         for_each_port(adapter, i) {
 188                 const unsigned int numa_node = rte_socket_id();
 189                 char name[RTE_ETH_NAME_MAX_LEN];
 190                 struct rte_eth_dev *eth_dev;
 191                 int port_id;
 192
 193                 if (pmask == 0)
 194                         break;
 195                 port_id = ffs(pmask) - 1;
 196                 pmask &= ~(1 << port_id);
 197
 198                 snprintf(name, sizeof(name), "%s_%d",
 199                          adapter->pdev->device.name, i);
 200
 201                 if (i == 0) {
 202                         /* First port is already allocated by DPDK */
 203                         eth_dev = adapter->eth_dev;
 204                         goto allocate_mac;
 205                 }
 206
 207                 /*
 208                  * now do all data allocation - for eth_dev structure,
 209                  * and internal (private) data for the remaining ports
 210                  */
 211
 212                 /* reserve an ethdev entry */
 213                 eth_dev = rte_eth_dev_allocate(name);
 214                 if (!eth_dev) {
 215                         err = -ENOMEM;
 216                         goto out_free;
 217                 }
 218                 eth_dev->data->dev_private =
 219                         rte_zmalloc_socket(name, sizeof(struct port_info),
 220                                            RTE_CACHE_LINE_SIZE, numa_node);
 221                 if (!eth_dev->data->dev_private)
 222                         goto out_free;
 223
 224 allocate_mac:
 225                 pi = (struct port_info *)eth_dev->data->dev_private;
 226                 adapter->port[i] = pi;
 227                 pi->eth_dev = eth_dev;
 228                 pi->adapter = adapter;
 229                 pi->xact_addr_filt = -1;
 230                 pi->port_id = port_id;
 231                 pi->pidx = i;
 232
 233                 pi->eth_dev->device = &adapter->pdev->device;
 234                 pi->eth_dev->dev_ops = adapter->eth_dev->dev_ops;
 235                 pi->eth_dev->tx_pkt_burst = adapter->eth_dev->tx_pkt_burst;
 236                 pi->eth_dev->rx_pkt_burst = adapter->eth_dev->rx_pkt_burst;
 237
 238                 rte_eth_copy_pci_info(pi->eth_dev, adapter->pdev);
 239                 pi->eth_dev->data->mac_addrs = rte_zmalloc(name,
 240                                                            ETHER_ADDR_LEN, 0);
 241                 if (!pi->eth_dev->data->mac_addrs) {
 242                         dev_err(adapter, "%s: Mem allocation failed for storing mac addr, aborting\n",
 243                                 __func__);
 244                         err = -ENOMEM;
 245                         goto out_free;
 246                 }
 247         }
 248
 249         if (adapter->flags & FW_OK) {
 250                 err = t4vf_port_init(adapter);
 251                 if (err) {
 252                         dev_err(adapter, "%s: t4_port_init failed with err %d\n",
 253                                 __func__, err);
 254                         goto out_free;
 255                 }
 256         }
 257
 258         cfg_queues(adapter->eth_dev);
 259         print_adapter_info(adapter);
 260         print_port_info(adapter);
 261
 262         return 0;
 263
 264 out_free:
 265         for_each_port(adapter, i) {
 266                 pi = adap2pinfo(adapter, i);
 267                 if (pi->viid != 0)
 268                         t4_free_vi(adapter, adapter->mbox, adapter->pf,
 269                                    0, pi->viid);
 270                 /* Skip first port since it'll be de-allocated by DPDK */
 271                 if (i == 0)
 272                         continue;
 273                 if (pi->eth_dev) {
 274                         if (pi->eth_dev->data->dev_private)
 275                                 rte_free(pi->eth_dev->data->dev_private);
 276                         rte_eth_dev_release_port(pi->eth_dev);
 277                 }
 278         }
 279         return -err;
 280 }