sys/dev/cxgbe/common/t4vf_hw.c

   1 /*-
   2  * Copyright (c) 2016 Chelsio Communications, Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  29
  30 #include "common.h"
  31 #include "t4_regs.h"
  32
  33 #undef msleep
  34 #define msleep(x) do { \
  35         if (cold) \
  36                 DELAY((x) * 1000); \
  37         else \
  38                 pause("t4hw", (x) * hz / 1000); \
  39 } while (0)
  40
  41 /*
  42  * Wait for the device to become ready (signified by our "who am I" register
  43  * returning a value other than all 1's).  Return an error if it doesn't
  44  * become ready ...
  45  */
  46 int t4vf_wait_dev_ready(struct adapter *adapter)
  47 {
  48         const u32 whoami = VF_PL_REG(A_PL_VF_WHOAMI);
  49         const u32 notready1 = 0xffffffff;
  50         const u32 notready2 = 0xeeeeeeee;
  51         u32 val;
  52
  53         val = t4_read_reg(adapter, whoami);
  54         if (val != notready1 && val != notready2)
  55                 return 0;
  56         msleep(500);
  57         val = t4_read_reg(adapter, whoami);
  58         if (val != notready1 && val != notready2)
  59                 return 0;
  60         else
  61                 return -EIO;
  62 }
  63
  64
  65 /**
  66  *      t4vf_fw_reset - issue a reset to FW
  67  *      @adapter: the adapter
  68  *
  69  *      Issues a reset command to FW.  For a Physical Function this would
  70  *      result in the Firmware reseting all of its state.  For a Virtual
  71  *      Function this just resets the state associated with the VF.
  72  */
  73 int t4vf_fw_reset(struct adapter *adapter)
  74 {
  75         struct fw_reset_cmd cmd;
  76
  77         memset(&cmd, 0, sizeof(cmd));
  78         cmd.op_to_write = cpu_to_be32(V_FW_CMD_OP(FW_RESET_CMD) |
  79                                       F_FW_CMD_WRITE);
  80         cmd.retval_len16 = cpu_to_be32(V_FW_CMD_LEN16(FW_LEN16(cmd)));
  81         return t4vf_wr_mbox(adapter, &cmd, sizeof(cmd), NULL);
  82 }
  83
  84 /**
  85  *      t4vf_get_sge_params - retrieve adapter Scatter gather Engine parameters
  86  *      @adapter: the adapter
  87  *
  88  *      Retrieves various core SGE parameters in the form of hardware SGE
  89  *      register values.  The caller is responsible for decoding these as
  90  *      needed.  The SGE parameters are stored in @adapter->params.sge.
  91  */
  92 int t4vf_get_sge_params(struct adapter *adapter)
  93 {
  94         struct sge_params *sp = &adapter->params.sge;
  95         u32 params[7], vals[7];
  96         u32 whoami;
  97         unsigned int pf, s_hps;
  98         int i, v;
  99
 100         params[0] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) |
 101                      V_FW_PARAMS_PARAM_XYZ(A_SGE_CONTROL));
 102         params[1] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) |
 103                      V_FW_PARAMS_PARAM_XYZ(A_SGE_HOST_PAGE_SIZE));
 104         params[2] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) |
 105                      V_FW_PARAMS_PARAM_XYZ(A_SGE_TIMER_VALUE_0_AND_1));
 106         params[3] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) |
 107                      V_FW_PARAMS_PARAM_XYZ(A_SGE_TIMER_VALUE_2_AND_3));
 108         params[4] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) |
 109                      V_FW_PARAMS_PARAM_XYZ(A_SGE_TIMER_VALUE_4_AND_5));
 110         params[5] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) |
 111                      V_FW_PARAMS_PARAM_XYZ(A_SGE_CONM_CTRL));
 112         params[6] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) |
 113                      V_FW_PARAMS_PARAM_XYZ(A_SGE_INGRESS_RX_THRESHOLD));
 114         v = t4vf_query_params(adapter, 7, params, vals);
 115         if (v != FW_SUCCESS)
 116                 return v;
 117
 118         sp->sge_control = vals[0];
 119         sp->counter_val[0] = G_THRESHOLD_0(vals[6]);
 120         sp->counter_val[1] = G_THRESHOLD_1(vals[6]);
 121         sp->counter_val[2] = G_THRESHOLD_2(vals[6]);
 122         sp->counter_val[3] = G_THRESHOLD_3(vals[6]);
 123         sp->timer_val[0] = core_ticks_to_us(adapter, G_TIMERVALUE0(vals[2]));
 124         sp->timer_val[1] = core_ticks_to_us(adapter, G_TIMERVALUE1(vals[2]));
 125         sp->timer_val[2] = core_ticks_to_us(adapter, G_TIMERVALUE2(vals[3]));
 126         sp->timer_val[3] = core_ticks_to_us(adapter, G_TIMERVALUE3(vals[3]));
 127         sp->timer_val[4] = core_ticks_to_us(adapter, G_TIMERVALUE4(vals[4]));
 128         sp->timer_val[5] = core_ticks_to_us(adapter, G_TIMERVALUE5(vals[4]));
 129
 130         sp->fl_starve_threshold = G_EGRTHRESHOLD(vals[5]) * 2 + 1;
 131         if (is_t4(adapter))
 132                 sp->fl_starve_threshold2 = sp->fl_starve_threshold;
 133         else
 134                 sp->fl_starve_threshold2 = G_EGRTHRESHOLDPACKING(vals[5]) * 2 +
 135                     1;
 136
 137         /*
 138          * We need the Queues/Page and Host Page Size for our VF.
 139          * This is based on the PF from which we're instantiated.
 140          */
 141         whoami = t4_read_reg(adapter, VF_PL_REG(A_PL_VF_WHOAMI));
 142         pf = G_SOURCEPF(whoami);
 143
 144         s_hps = (S_HOSTPAGESIZEPF0 +
 145             (S_HOSTPAGESIZEPF1 - S_HOSTPAGESIZEPF0) * pf);
 146         sp->page_shift = ((vals[1] >> s_hps) & M_HOSTPAGESIZEPF0) + 10;
 147
 148         for (i = 0; i < SGE_FLBUF_SIZES; i++) {
 149                 params[0] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) |
 150                     V_FW_PARAMS_PARAM_XYZ(A_SGE_FL_BUFFER_SIZE0 + (4 * i)));
 151                 v = t4vf_query_params(adapter, 1, params, vals);
 152                 if (v != FW_SUCCESS)
 153                         return v;
 154
 155                 sp->sge_fl_buffer_size[i] = vals[0];
 156         }
 157
 158         /*
 159          * T4 uses a single control field to specify both the PCIe Padding and
 160          * Packing Boundary.  T5 introduced the ability to specify these
 161          * separately with the Padding Boundary in SGE_CONTROL and and Packing
 162          * Boundary in SGE_CONTROL2.  So for T5 and later we need to grab
 163          * SGE_CONTROL in order to determine how ingress packet data will be
 164          * laid out in Packed Buffer Mode.  Unfortunately, older versions of
 165          * the firmware won't let us retrieve SGE_CONTROL2 so if we get a
 166          * failure grabbing it we throw an error since we can't figure out the
 167          * right value.
 168          */
 169         sp->spg_len = sp->sge_control & F_EGRSTATUSPAGESIZE ? 128 : 64;
 170         sp->fl_pktshift = G_PKTSHIFT(sp->sge_control);
 171         sp->pad_boundary = 1 << (G_INGPADBOUNDARY(sp->sge_control) + 5);
 172         if (is_t4(adapter))
 173                 sp->pack_boundary = sp->pad_boundary;
 174         else {
 175                 params[0] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) |
 176                              V_FW_PARAMS_PARAM_XYZ(A_SGE_CONTROL2));
 177                 v = t4vf_query_params(adapter, 1, params, vals);
 178                 if (v != FW_SUCCESS) {
 179                         CH_ERR(adapter, "Unable to get SGE Control2; "
 180                                "probably old firmware.\n");
 181                         return v;
 182                 }
 183                 if (G_INGPACKBOUNDARY(vals[0]) == 0)
 184                         sp->pack_boundary = 16;
 185                 else
 186                         sp->pack_boundary = 1 << (G_INGPACKBOUNDARY(vals[0]) +
 187                             5);
 188         }
 189
 190         /*
 191          * For T5 and later we want to use the new BAR2 Doorbells.
 192          * Unfortunately, older firmware didn't allow the this register to be
 193          * read.
 194          */
 195         if (!is_t4(adapter)) {
 196                 unsigned int s_qpp;
 197
 198                 params[0] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) |
 199                              V_FW_PARAMS_PARAM_XYZ(A_SGE_EGRESS_QUEUES_PER_PAGE_VF));
 200                 params[1] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) |
 201                              V_FW_PARAMS_PARAM_XYZ(A_SGE_INGRESS_QUEUES_PER_PAGE_VF));
 202                 v = t4vf_query_params(adapter, 2, params, vals);
 203                 if (v != FW_SUCCESS) {
 204                         CH_WARN(adapter, "Unable to get VF SGE Queues/Page; "
 205                                 "probably old firmware.\n");
 206                         return v;
 207                 }
 208
 209                 s_qpp = (S_QUEUESPERPAGEPF0 +
 210                          (S_QUEUESPERPAGEPF1 - S_QUEUESPERPAGEPF0) * pf);
 211                 sp->eq_s_qpp = ((vals[0] >> s_qpp) & M_QUEUESPERPAGEPF0);
 212                 sp->iq_s_qpp = ((vals[1] >> s_qpp) & M_QUEUESPERPAGEPF0);
 213         }
 214
 215         return 0;
 216 }
 217
 218 /**
 219  *      t4vf_get_rss_glb_config - retrieve adapter RSS Global Configuration
 220  *      @adapter: the adapter
 221  *
 222  *      Retrieves global RSS mode and parameters with which we have to live
 223  *      and stores them in the @adapter's RSS parameters.
 224  */
 225 int t4vf_get_rss_glb_config(struct adapter *adapter)
 226 {
 227         struct rss_params *rss = &adapter->params.rss;
 228         struct fw_rss_glb_config_cmd cmd, rpl;
 229         int v;
 230
 231         /*
 232          * Execute an RSS Global Configuration read command to retrieve
 233          * our RSS configuration.
 234          */
 235         memset(&cmd, 0, sizeof(cmd));
 236         cmd.op_to_write = cpu_to_be32(V_FW_CMD_OP(FW_RSS_GLB_CONFIG_CMD) |
 237                                       F_FW_CMD_REQUEST |
 238                                       F_FW_CMD_READ);
 239         cmd.retval_len16 = cpu_to_be32(FW_LEN16(cmd));
 240         v = t4vf_wr_mbox(adapter, &cmd, sizeof(cmd), &rpl);
 241         if (v != FW_SUCCESS)
 242                 return v;
 243
 244         /*
 245          * Transate the big-endian RSS Global Configuration into our
 246          * cpu-endian format based on the RSS mode.  We also do first level
 247          * filtering at this point to weed out modes which don't support
 248          * VF Drivers ...
 249          */
 250         rss->mode = G_FW_RSS_GLB_CONFIG_CMD_MODE(
 251                         be32_to_cpu(rpl.u.manual.mode_pkd));
 252         switch (rss->mode) {
 253         case FW_RSS_GLB_CONFIG_CMD_MODE_BASICVIRTUAL: {
 254                 u32 word = be32_to_cpu(
 255                                 rpl.u.basicvirtual.synmapen_to_hashtoeplitz);
 256
 257                 rss->u.basicvirtual.synmapen =
 258                         ((word & F_FW_RSS_GLB_CONFIG_CMD_SYNMAPEN) != 0);
 259                 rss->u.basicvirtual.syn4tupenipv6 =
 260                         ((word & F_FW_RSS_GLB_CONFIG_CMD_SYN4TUPENIPV6) != 0);
 261                 rss->u.basicvirtual.syn2tupenipv6 =
 262                         ((word & F_FW_RSS_GLB_CONFIG_CMD_SYN2TUPENIPV6) != 0);
 263                 rss->u.basicvirtual.syn4tupenipv4 =
 264                         ((word & F_FW_RSS_GLB_CONFIG_CMD_SYN4TUPENIPV4) != 0);
 265                 rss->u.basicvirtual.syn2tupenipv4 =
 266                         ((word & F_FW_RSS_GLB_CONFIG_CMD_SYN2TUPENIPV4) != 0);
 267
 268                 rss->u.basicvirtual.ofdmapen =
 269                         ((word & F_FW_RSS_GLB_CONFIG_CMD_OFDMAPEN) != 0);
 270
 271                 rss->u.basicvirtual.tnlmapen =
 272                         ((word & F_FW_RSS_GLB_CONFIG_CMD_TNLMAPEN) != 0);
 273                 rss->u.basicvirtual.tnlalllookup =
 274                         ((word  & F_FW_RSS_GLB_CONFIG_CMD_TNLALLLKP) != 0);
 275
 276                 rss->u.basicvirtual.hashtoeplitz =
 277                         ((word & F_FW_RSS_GLB_CONFIG_CMD_HASHTOEPLITZ) != 0);
 278
 279                 /* we need at least Tunnel Map Enable to be set */
 280                 if (!rss->u.basicvirtual.tnlmapen)
 281                         return -EINVAL;
 282                 break;
 283         }
 284
 285         default:
 286                 /* all unknown/unsupported RSS modes result in an error */
 287                 return -EINVAL;
 288         }
 289
 290         return 0;
 291 }
 292
 293 /**
 294  *      t4vf_get_vfres - retrieve VF resource limits
 295  *      @adapter: the adapter
 296  *
 297  *      Retrieves configured resource limits and capabilities for a virtual
 298  *      function.  The results are stored in @adapter->vfres.
 299  */
 300 int t4vf_get_vfres(struct adapter *adapter)
 301 {
 302         struct vf_resources *vfres = &adapter->params.vfres;
 303         struct fw_pfvf_cmd cmd, rpl;
 304         int v;
 305         u32 word;
 306
 307         /*
 308          * Execute PFVF Read command to get VF resource limits; bail out early
 309          * with error on command failure.
 310          */
 311         memset(&cmd, 0, sizeof(cmd));
 312         cmd.op_to_vfn = cpu_to_be32(V_FW_CMD_OP(FW_PFVF_CMD) |
 313                                     F_FW_CMD_REQUEST |
 314                                     F_FW_CMD_READ);
 315         cmd.retval_len16 = cpu_to_be32(FW_LEN16(cmd));
 316         v = t4vf_wr_mbox(adapter, &cmd, sizeof(cmd), &rpl);
 317         if (v != FW_SUCCESS)
 318                 return v;
 319
 320         /*
 321          * Extract VF resource limits and return success.
 322          */
 323         word = be32_to_cpu(rpl.niqflint_niq);
 324         vfres->niqflint = G_FW_PFVF_CMD_NIQFLINT(word);
 325         vfres->niq = G_FW_PFVF_CMD_NIQ(word);
 326
 327         word = be32_to_cpu(rpl.type_to_neq);
 328         vfres->neq = G_FW_PFVF_CMD_NEQ(word);
 329         vfres->pmask = G_FW_PFVF_CMD_PMASK(word);
 330
 331         word = be32_to_cpu(rpl.tc_to_nexactf);
 332         vfres->tc = G_FW_PFVF_CMD_TC(word);
 333         vfres->nvi = G_FW_PFVF_CMD_NVI(word);
 334         vfres->nexactf = G_FW_PFVF_CMD_NEXACTF(word);
 335
 336         word = be32_to_cpu(rpl.r_caps_to_nethctrl);
 337         vfres->r_caps = G_FW_PFVF_CMD_R_CAPS(word);
 338         vfres->wx_caps = G_FW_PFVF_CMD_WX_CAPS(word);
 339         vfres->nethctrl = G_FW_PFVF_CMD_NETHCTRL(word);
 340
 341         return 0;
 342 }
 343
 344 /**
 345  */
 346 int t4vf_prep_adapter(struct adapter *adapter)
 347 {
 348         int err;
 349
 350         /*
 351          * Wait for the device to become ready before proceeding ...
 352          */
 353         err = t4vf_wait_dev_ready(adapter);
 354         if (err)
 355                 return err;
 356
 357         adapter->params.chipid = pci_get_device(adapter->dev) >> 12;
 358         if (adapter->params.chipid >= 0xa) {
 359                 adapter->params.chipid -= (0xa - 0x4);
 360                 adapter->params.fpga = 1;
 361         }
 362
 363         /*
 364          * Default port and clock for debugging in case we can't reach
 365          * firmware.
 366          */
 367         adapter->params.nports = 1;
 368         adapter->params.vfres.pmask = 1;
 369         adapter->params.vpd.cclk = 50000;
 370
 371         adapter->chip_params = t4_get_chip_params(chip_id(adapter));
 372         if (adapter->chip_params == NULL)
 373                 return -EINVAL;
 374
 375         return 0;
 376 }