drivers/net/ixgbe/ixgbe_82599_bypass.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2015 Intel Corporation
   3  */
   4
   5 #include "base/ixgbe_type.h"
   6 #include "base/ixgbe_82599.h"
   7 #include "base/ixgbe_api.h"
   8 #include "base/ixgbe_common.h"
   9 #include "base/ixgbe_phy.h"
  10 #include "ixgbe_bypass_defines.h"
  11 #include "ixgbe_bypass.h"
  12
  13 /**
  14  *  ixgbe_set_fiber_fixed_speed - Set module link speed for fixed fiber
  15  *  @hw: pointer to hardware structure
  16  *  @speed: link speed to set
  17  *
  18  *  We set the module speed differently for fixed fiber.  For other
  19  *  multi-speed devices we don't have an error value so here if we
  20  *  detect an error we just log it and exit.
  21  */
  22 static void
  23 ixgbe_set_fiber_fixed_speed(struct ixgbe_hw *hw, ixgbe_link_speed speed)
  24 {
  25         s32 status;
  26         u8 rs, eeprom_data;
  27
  28         switch (speed) {
  29         case IXGBE_LINK_SPEED_10GB_FULL:
  30                 /* one bit mask same as setting on */
  31                 rs = IXGBE_SFF_SOFT_RS_SELECT_10G;
  32                 break;
  33         case IXGBE_LINK_SPEED_1GB_FULL:
  34                 rs = IXGBE_SFF_SOFT_RS_SELECT_1G;
  35                 break;
  36         default:
  37                 PMD_DRV_LOG(ERR, "Invalid fixed module speed");
  38                 return;
  39         }
  40
  41         /* Set RS0 */
  42         status = hw->phy.ops.read_i2c_byte(hw, IXGBE_SFF_SFF_8472_OSCB,
  43                                            IXGBE_I2C_EEPROM_DEV_ADDR2,
  44                                            &eeprom_data);
  45         if (status) {
  46                 PMD_DRV_LOG(ERR, "Failed to read Rx Rate Select RS0");
  47                 goto out;
  48         }
  49
  50         eeprom_data = (eeprom_data & ~IXGBE_SFF_SOFT_RS_SELECT_MASK) & rs;
  51
  52         status = hw->phy.ops.write_i2c_byte(hw, IXGBE_SFF_SFF_8472_OSCB,
  53                                             IXGBE_I2C_EEPROM_DEV_ADDR2,
  54                                             eeprom_data);
  55         if (status) {
  56                 PMD_DRV_LOG(ERR, "Failed to write Rx Rate Select RS0");
  57                 goto out;
  58         }
  59
  60         /* Set RS1 */
  61         status = hw->phy.ops.read_i2c_byte(hw, IXGBE_SFF_SFF_8472_ESCB,
  62                                            IXGBE_I2C_EEPROM_DEV_ADDR2,
  63                                            &eeprom_data);
  64         if (status) {
  65                 PMD_DRV_LOG(ERR, "Failed to read Rx Rate Select RS1");
  66                 goto out;
  67         }
  68
  69         eeprom_data = (eeprom_data & ~IXGBE_SFF_SOFT_RS_SELECT_MASK) & rs;
  70
  71         status = hw->phy.ops.write_i2c_byte(hw, IXGBE_SFF_SFF_8472_ESCB,
  72                                             IXGBE_I2C_EEPROM_DEV_ADDR2,
  73                                             eeprom_data);
  74         if (status) {
  75                 PMD_DRV_LOG(ERR, "Failed to write Rx Rate Select RS1");
  76                 goto out;
  77         }
  78 out:
  79         return;
  80 }
  81
  82 /**
  83  *  ixgbe_setup_mac_link_multispeed_fixed_fiber - Set MAC link speed
  84  *  @hw: pointer to hardware structure
  85  *  @speed: new link speed
  86  *  @autoneg_wait_to_complete: true when waiting for completion is needed
  87  *
  88  *  Set the link speed in the AUTOC register and restarts link.
  89  **/
  90 static s32
  91 ixgbe_setup_mac_link_multispeed_fixed_fiber(struct ixgbe_hw *hw,
  92                                      ixgbe_link_speed speed,
  93                                      bool autoneg_wait_to_complete)
  94 {
  95         s32 status = IXGBE_SUCCESS;
  96         ixgbe_link_speed link_speed = IXGBE_LINK_SPEED_UNKNOWN;
  97         ixgbe_link_speed highest_link_speed = IXGBE_LINK_SPEED_UNKNOWN;
  98         u32 speedcnt = 0;
  99         u32 esdp_reg = IXGBE_READ_REG(hw, IXGBE_ESDP);
 100         u32 i = 0;
 101         bool link_up = false;
 102         bool negotiation;
 103
 104         PMD_INIT_FUNC_TRACE();
 105
 106         /* Mask off requested but non-supported speeds */
 107         status = ixgbe_get_link_capabilities(hw, &link_speed, &negotiation);
 108         if (status != IXGBE_SUCCESS)
 109                 return status;
 110
 111         speed &= link_speed;
 112
 113         /*
 114          * Try each speed one by one, highest priority first.  We do this in
 115          * software because 10gb fiber doesn't support speed autonegotiation.
 116          */
 117         if (speed & IXGBE_LINK_SPEED_10GB_FULL) {
 118                 speedcnt++;
 119                 highest_link_speed = IXGBE_LINK_SPEED_10GB_FULL;
 120
 121                 /* If we already have link at this speed, just jump out */
 122                 status = ixgbe_check_link(hw, &link_speed, &link_up, false);
 123                 if (status != IXGBE_SUCCESS)
 124                         return status;
 125
 126                 if ((link_speed == IXGBE_LINK_SPEED_10GB_FULL) && link_up)
 127                         goto out;
 128                 /* Set the module link speed */
 129                 ixgbe_set_fiber_fixed_speed(hw, IXGBE_LINK_SPEED_10GB_FULL);
 130
 131                 /* Set the module link speed */
 132                 esdp_reg |= (IXGBE_ESDP_SDP5_DIR | IXGBE_ESDP_SDP5);
 133                 IXGBE_WRITE_REG(hw, IXGBE_ESDP, esdp_reg);
 134                 IXGBE_WRITE_FLUSH(hw);
 135
 136                 /* Allow module to change analog characteristics (1G->10G) */
 137                 msec_delay(40);
 138
 139                 status = ixgbe_setup_mac_link_82599(hw,
 140                                                     IXGBE_LINK_SPEED_10GB_FULL,
 141                                                     autoneg_wait_to_complete);
 142                 if (status != IXGBE_SUCCESS)
 143                         return status;
 144
 145                 /* Flap the tx laser if it has not already been done */
 146                 ixgbe_flap_tx_laser(hw);
 147
 148                 /*
 149                  * Wait for the controller to acquire link.  Per IEEE 802.3ap,
 150                  * Section 73.10.2, we may have to wait up to 500ms if KR is
 151                  * attempted.  82599 uses the same timing for 10g SFI.
 152                  */
 153                 for (i = 0; i < 5; i++) {
 154                         /* Wait for the link partner to also set speed */
 155                         msec_delay(100);
 156
 157                         /* If we have link, just jump out */
 158                         status = ixgbe_check_link(hw, &link_speed,
 159                                                   &link_up, false);
 160                         if (status != IXGBE_SUCCESS)
 161                                 return status;
 162
 163                         if (link_up)
 164                                 goto out;
 165                 }
 166         }
 167
 168         if (speed & IXGBE_LINK_SPEED_1GB_FULL) {
 169                 speedcnt++;
 170                 if (highest_link_speed == IXGBE_LINK_SPEED_UNKNOWN)
 171                         highest_link_speed = IXGBE_LINK_SPEED_1GB_FULL;
 172
 173                 /* If we already have link at this speed, just jump out */
 174                 status = ixgbe_check_link(hw, &link_speed, &link_up, false);
 175                 if (status != IXGBE_SUCCESS)
 176                         return status;
 177
 178                 if ((link_speed == IXGBE_LINK_SPEED_1GB_FULL) && link_up)
 179                         goto out;
 180
 181                 /* Set the module link speed */
 182                 ixgbe_set_fiber_fixed_speed(hw, IXGBE_LINK_SPEED_1GB_FULL);
 183
 184                 /* Allow module to change analog characteristics (10G->1G) */
 185                 msec_delay(40);
 186
 187                 status = ixgbe_setup_mac_link_82599(hw,
 188                                                     IXGBE_LINK_SPEED_1GB_FULL,
 189                                                     autoneg_wait_to_complete);
 190                 if (status != IXGBE_SUCCESS)
 191                         return status;
 192
 193                 /* Flap the tx laser if it has not already been done */
 194                 ixgbe_flap_tx_laser(hw);
 195
 196                 /* Wait for the link partner to also set speed */
 197                 msec_delay(100);
 198
 199                 /* If we have link, just jump out */
 200                 status = ixgbe_check_link(hw, &link_speed, &link_up, false);
 201                 if (status != IXGBE_SUCCESS)
 202                         return status;
 203
 204                 if (link_up)
 205                         goto out;
 206         }
 207
 208         /*
 209          * We didn't get link.  Configure back to the highest speed we tried,
 210          * (if there was more than one).  We call ourselves back with just the
 211          * single highest speed that the user requested.
 212          */
 213         if (speedcnt > 1)
 214                 status = ixgbe_setup_mac_link_multispeed_fixed_fiber(hw,
 215                         highest_link_speed, autoneg_wait_to_complete);
 216
 217 out:
 218         /* Set autoneg_advertised value based on input link speed */
 219         hw->phy.autoneg_advertised = 0;
 220
 221         if (speed & IXGBE_LINK_SPEED_10GB_FULL)
 222                 hw->phy.autoneg_advertised |= IXGBE_LINK_SPEED_10GB_FULL;
 223
 224         if (speed & IXGBE_LINK_SPEED_1GB_FULL)
 225                 hw->phy.autoneg_advertised |= IXGBE_LINK_SPEED_1GB_FULL;
 226
 227         return status;
 228 }
 229
 230 static enum ixgbe_media_type
 231 ixgbe_bypass_get_media_type(struct ixgbe_hw *hw)
 232 {
 233         enum ixgbe_media_type media_type;
 234
 235         PMD_INIT_FUNC_TRACE();
 236
 237         if (hw->device_id == IXGBE_DEV_ID_82599_BYPASS) {
 238                 media_type = ixgbe_media_type_fiber;
 239         } else {
 240                 media_type = ixgbe_get_media_type_82599(hw);
 241         }
 242         return media_type;
 243 }
 244
 245 /*
 246  * Wrapper around shared code (base driver) to support BYPASS nic.
 247  */
 248 s32
 249 ixgbe_bypass_init_shared_code(struct ixgbe_hw *hw)
 250 {
 251         s32 ret_val;
 252
 253         if (hw->device_id == IXGBE_DEV_ID_82599_BYPASS) {
 254                 hw->mac.type = ixgbe_mac_82599EB;
 255         }
 256
 257         ret_val = ixgbe_init_shared_code(hw);
 258         if (hw->device_id == IXGBE_DEV_ID_82599_BYPASS) {
 259                 hw->mac.ops.get_media_type = &ixgbe_bypass_get_media_type;
 260                 ixgbe_init_mac_link_ops_82599(hw);
 261         }
 262
 263         return ret_val;
 264 }
 265
 266 s32
 267 ixgbe_bypass_init_hw(struct ixgbe_hw *hw)
 268 {
 269         int rc;
 270
 271         rc  = ixgbe_init_hw(hw);
 272         if (rc == 0 && hw->device_id == IXGBE_DEV_ID_82599_BYPASS) {
 273
 274                 hw->mac.ops.setup_link =
 275                         &ixgbe_setup_mac_link_multispeed_fixed_fiber;
 276
 277                 hw->mac.ops.get_media_type = &ixgbe_bypass_get_media_type;
 278
 279                 hw->mac.ops.disable_tx_laser = NULL;
 280                 hw->mac.ops.enable_tx_laser = NULL;
 281                 hw->mac.ops.flap_tx_laser = NULL;
 282         }
 283
 284         return rc;
 285 }