drivers/net/ixgbe/ixgbe_82599_bypass.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include "base/ixgbe_type.h"
  35 #include "base/ixgbe_82599.h"
  36 #include "base/ixgbe_api.h"
  37 #include "base/ixgbe_common.h"
  38 #include "base/ixgbe_phy.h"
  39 #include "ixgbe_bypass_defines.h"
  40 #include "ixgbe_bypass.h"
  41
  42 /**
  43  *  ixgbe_set_fiber_fixed_speed - Set module link speed for fixed fiber
  44  *  @hw: pointer to hardware structure
  45  *  @speed: link speed to set
  46  *
  47  *  We set the module speed differently for fixed fiber.  For other
  48  *  multi-speed devices we don't have an error value so here if we
  49  *  detect an error we just log it and exit.
  50  */
  51 static void
  52 ixgbe_set_fiber_fixed_speed(struct ixgbe_hw *hw, ixgbe_link_speed speed)
  53 {
  54         s32 status;
  55         u8 rs, eeprom_data;
  56
  57         switch (speed) {
  58         case IXGBE_LINK_SPEED_10GB_FULL:
  59                 /* one bit mask same as setting on */
  60                 rs = IXGBE_SFF_SOFT_RS_SELECT_10G;
  61                 break;
  62         case IXGBE_LINK_SPEED_1GB_FULL:
  63                 rs = IXGBE_SFF_SOFT_RS_SELECT_1G;
  64                 break;
  65         default:
  66                 PMD_DRV_LOG(ERR, "Invalid fixed module speed");
  67                 return;
  68         }
  69
  70         /* Set RS0 */
  71         status = hw->phy.ops.read_i2c_byte(hw, IXGBE_SFF_SFF_8472_OSCB,
  72                                            IXGBE_I2C_EEPROM_DEV_ADDR2,
  73                                            &eeprom_data);
  74         if (status) {
  75                 PMD_DRV_LOG(ERR, "Failed to read Rx Rate Select RS0");
  76                 goto out;
  77         }
  78
  79         eeprom_data = (eeprom_data & ~IXGBE_SFF_SOFT_RS_SELECT_MASK) & rs;
  80
  81         status = hw->phy.ops.write_i2c_byte(hw, IXGBE_SFF_SFF_8472_OSCB,
  82                                             IXGBE_I2C_EEPROM_DEV_ADDR2,
  83                                             eeprom_data);
  84         if (status) {
  85                 PMD_DRV_LOG(ERR, "Failed to write Rx Rate Select RS0");
  86                 goto out;
  87         }
  88
  89         /* Set RS1 */
  90         status = hw->phy.ops.read_i2c_byte(hw, IXGBE_SFF_SFF_8472_ESCB,
  91                                            IXGBE_I2C_EEPROM_DEV_ADDR2,
  92                                            &eeprom_data);
  93         if (status) {
  94                 PMD_DRV_LOG(ERR, "Failed to read Rx Rate Select RS1");
  95                 goto out;
  96         }
  97
  98         eeprom_data = (eeprom_data & ~IXGBE_SFF_SOFT_RS_SELECT_MASK) & rs;
  99
 100         status = hw->phy.ops.write_i2c_byte(hw, IXGBE_SFF_SFF_8472_ESCB,
 101                                             IXGBE_I2C_EEPROM_DEV_ADDR2,
 102                                             eeprom_data);
 103         if (status) {
 104                 PMD_DRV_LOG(ERR, "Failed to write Rx Rate Select RS1");
 105                 goto out;
 106         }
 107 out:
 108         return;
 109 }
 110
 111 /**
 112  *  ixgbe_setup_mac_link_multispeed_fixed_fiber - Set MAC link speed
 113  *  @hw: pointer to hardware structure
 114  *  @speed: new link speed
 115  *  @autoneg_wait_to_complete: true when waiting for completion is needed
 116  *
 117  *  Set the link speed in the AUTOC register and restarts link.
 118  **/
 119 static s32
 120 ixgbe_setup_mac_link_multispeed_fixed_fiber(struct ixgbe_hw *hw,
 121                                      ixgbe_link_speed speed,
 122                                      bool autoneg_wait_to_complete)
 123 {
 124         s32 status = IXGBE_SUCCESS;
 125         ixgbe_link_speed link_speed = IXGBE_LINK_SPEED_UNKNOWN;
 126         ixgbe_link_speed highest_link_speed = IXGBE_LINK_SPEED_UNKNOWN;
 127         u32 speedcnt = 0;
 128         u32 esdp_reg = IXGBE_READ_REG(hw, IXGBE_ESDP);
 129         u32 i = 0;
 130         bool link_up = false;
 131         bool negotiation;
 132
 133         PMD_INIT_FUNC_TRACE();
 134
 135         /* Mask off requested but non-supported speeds */
 136         status = ixgbe_get_link_capabilities(hw, &link_speed, &negotiation);
 137         if (status != IXGBE_SUCCESS)
 138                 return status;
 139
 140         speed &= link_speed;
 141
 142         /*
 143          * Try each speed one by one, highest priority first.  We do this in
 144          * software because 10gb fiber doesn't support speed autonegotiation.
 145          */
 146         if (speed & IXGBE_LINK_SPEED_10GB_FULL) {
 147                 speedcnt++;
 148                 highest_link_speed = IXGBE_LINK_SPEED_10GB_FULL;
 149
 150                 /* If we already have link at this speed, just jump out */
 151                 status = ixgbe_check_link(hw, &link_speed, &link_up, false);
 152                 if (status != IXGBE_SUCCESS)
 153                         return status;
 154
 155                 if ((link_speed == IXGBE_LINK_SPEED_10GB_FULL) && link_up)
 156                         goto out;
 157                 /* Set the module link speed */
 158                 ixgbe_set_fiber_fixed_speed(hw, IXGBE_LINK_SPEED_10GB_FULL);
 159
 160                 /* Set the module link speed */
 161                 esdp_reg |= (IXGBE_ESDP_SDP5_DIR | IXGBE_ESDP_SDP5);
 162                 IXGBE_WRITE_REG(hw, IXGBE_ESDP, esdp_reg);
 163                 IXGBE_WRITE_FLUSH(hw);
 164
 165                 /* Allow module to change analog characteristics (1G->10G) */
 166                 msec_delay(40);
 167
 168                 status = ixgbe_setup_mac_link_82599(hw,
 169                                                     IXGBE_LINK_SPEED_10GB_FULL,
 170                                                     autoneg_wait_to_complete);
 171                 if (status != IXGBE_SUCCESS)
 172                         return status;
 173
 174                 /* Flap the tx laser if it has not already been done */
 175                 ixgbe_flap_tx_laser(hw);
 176
 177                 /*
 178                  * Wait for the controller to acquire link.  Per IEEE 802.3ap,
 179                  * Section 73.10.2, we may have to wait up to 500ms if KR is
 180                  * attempted.  82599 uses the same timing for 10g SFI.
 181                  */
 182                 for (i = 0; i < 5; i++) {
 183                         /* Wait for the link partner to also set speed */
 184                         msec_delay(100);
 185
 186                         /* If we have link, just jump out */
 187                         status = ixgbe_check_link(hw, &link_speed,
 188                                                   &link_up, false);
 189                         if (status != IXGBE_SUCCESS)
 190                                 return status;
 191
 192                         if (link_up)
 193                                 goto out;
 194                 }
 195         }
 196
 197         if (speed & IXGBE_LINK_SPEED_1GB_FULL) {
 198                 speedcnt++;
 199                 if (highest_link_speed == IXGBE_LINK_SPEED_UNKNOWN)
 200                         highest_link_speed = IXGBE_LINK_SPEED_1GB_FULL;
 201
 202                 /* If we already have link at this speed, just jump out */
 203                 status = ixgbe_check_link(hw, &link_speed, &link_up, false);
 204                 if (status != IXGBE_SUCCESS)
 205                         return status;
 206
 207                 if ((link_speed == IXGBE_LINK_SPEED_1GB_FULL) && link_up)
 208                         goto out;
 209
 210                 /* Set the module link speed */
 211                 ixgbe_set_fiber_fixed_speed(hw, IXGBE_LINK_SPEED_1GB_FULL);
 212
 213                 /* Allow module to change analog characteristics (10G->1G) */
 214                 msec_delay(40);
 215
 216                 status = ixgbe_setup_mac_link_82599(hw,
 217                                                     IXGBE_LINK_SPEED_1GB_FULL,
 218                                                     autoneg_wait_to_complete);
 219                 if (status != IXGBE_SUCCESS)
 220                         return status;
 221
 222                 /* Flap the tx laser if it has not already been done */
 223                 ixgbe_flap_tx_laser(hw);
 224
 225                 /* Wait for the link partner to also set speed */
 226                 msec_delay(100);
 227
 228                 /* If we have link, just jump out */
 229                 status = ixgbe_check_link(hw, &link_speed, &link_up, false);
 230                 if (status != IXGBE_SUCCESS)
 231                         return status;
 232
 233                 if (link_up)
 234                         goto out;
 235         }
 236
 237         /*
 238          * We didn't get link.  Configure back to the highest speed we tried,
 239          * (if there was more than one).  We call ourselves back with just the
 240          * single highest speed that the user requested.
 241          */
 242         if (speedcnt > 1)
 243                 status = ixgbe_setup_mac_link_multispeed_fixed_fiber(hw,
 244                         highest_link_speed, autoneg_wait_to_complete);
 245
 246 out:
 247         /* Set autoneg_advertised value based on input link speed */
 248         hw->phy.autoneg_advertised = 0;
 249
 250         if (speed & IXGBE_LINK_SPEED_10GB_FULL)
 251                 hw->phy.autoneg_advertised |= IXGBE_LINK_SPEED_10GB_FULL;
 252
 253         if (speed & IXGBE_LINK_SPEED_1GB_FULL)
 254                 hw->phy.autoneg_advertised |= IXGBE_LINK_SPEED_1GB_FULL;
 255
 256         return status;
 257 }
 258
 259 static enum ixgbe_media_type
 260 ixgbe_bypass_get_media_type(struct ixgbe_hw *hw)
 261 {
 262         enum ixgbe_media_type media_type;
 263
 264         PMD_INIT_FUNC_TRACE();
 265
 266         if (hw->device_id == IXGBE_DEV_ID_82599_BYPASS) {
 267                 media_type = ixgbe_media_type_fiber;
 268         } else {
 269                 media_type = ixgbe_get_media_type_82599(hw);
 270         }
 271         return media_type;
 272 }
 273
 274 /*
 275  * Wrapper around shared code (base driver) to support BYPASS nic.
 276  */
 277 s32
 278 ixgbe_bypass_init_shared_code(struct ixgbe_hw *hw)
 279 {
 280         s32 ret_val;
 281
 282         if (hw->device_id == IXGBE_DEV_ID_82599_BYPASS) {
 283                 hw->mac.type = ixgbe_mac_82599EB;
 284         }
 285
 286         ret_val = ixgbe_init_shared_code(hw);
 287         if (hw->device_id == IXGBE_DEV_ID_82599_BYPASS) {
 288                 hw->mac.ops.get_media_type = &ixgbe_bypass_get_media_type;
 289                 ixgbe_init_mac_link_ops_82599(hw);
 290         }
 291
 292         return ret_val;
 293 }
 294
 295 s32
 296 ixgbe_bypass_init_hw(struct ixgbe_hw *hw)
 297 {
 298         int rc;
 299
 300         rc  = ixgbe_init_hw(hw);
 301         if (rc == 0 && hw->device_id == IXGBE_DEV_ID_82599_BYPASS) {
 302
 303                 hw->mac.ops.setup_link =
 304                         &ixgbe_setup_mac_link_multispeed_fixed_fiber;
 305
 306                 hw->mac.ops.get_media_type = &ixgbe_bypass_get_media_type;
 307
 308                 hw->mac.ops.disable_tx_laser = NULL;
 309                 hw->mac.ops.enable_tx_laser = NULL;
 310                 hw->mac.ops.flap_tx_laser = NULL;
 311         }
 312
 313         return rc;
 314 }