1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2018 Intel Corporation */ 3 4 #include <linux/delay.h> 5 6 #include "igc_hw.h" 7 #include "igc_i225.h" 8 #include "igc_mac.h" 9 #include "igc_base.h" 10 #include "igc.h" 11 12 /** 13 * igc_reset_hw_base - Reset hardware 14 * @hw: pointer to the HW structure 15 * 16 * This resets the hardware into a known state. This is a 17 * function pointer entry point called by the api module. 18 */ 19 static s32 igc_reset_hw_base(struct igc_hw *hw) 20 { 21 s32 ret_val; 22 u32 ctrl; 23 24 /* Prevent the PCI-E bus from sticking if there is no TLP connection 25 * on the last TLP read/write transaction when MAC is reset. 26 */ 27 ret_val = igc_disable_pcie_master(hw); 28 if (ret_val) 29 hw_dbg("PCI-E Master disable polling has failed\n"); 30 31 hw_dbg("Masking off all interrupts\n"); 32 wr32(IGC_IMC, 0xffffffff); 33 34 wr32(IGC_RCTL, 0); 35 wr32(IGC_TCTL, IGC_TCTL_PSP); 36 wrfl(); 37 38 usleep_range(10000, 20000); 39 40 ctrl = rd32(IGC_CTRL); 41 42 hw_dbg("Issuing a global reset to MAC\n"); 43 wr32(IGC_CTRL, ctrl | IGC_CTRL_RST); 44 45 ret_val = igc_get_auto_rd_done(hw); 46 if (ret_val) { 47 /* When auto config read does not complete, do not 48 * return with an error. This can happen in situations 49 * where there is no eeprom and prevents getting link. 50 */ 51 hw_dbg("Auto Read Done did not complete\n"); 52 } 53 54 /* Clear any pending interrupt events. */ 55 wr32(IGC_IMC, 0xffffffff); 56 rd32(IGC_ICR); 57 58 return ret_val; 59 } 60 61 /** 62 * igc_init_nvm_params_base - Init NVM func ptrs. 63 * @hw: pointer to the HW structure 64 */ 65 static s32 igc_init_nvm_params_base(struct igc_hw *hw) 66 { 67 struct igc_nvm_info *nvm = &hw->nvm; 68 u32 eecd = rd32(IGC_EECD); 69 u16 size; 70 71 size = (u16)((eecd & IGC_EECD_SIZE_EX_MASK) >> 72 IGC_EECD_SIZE_EX_SHIFT); 73 74 /* Added to a constant, "size" becomes the left-shift value 75 * for setting word_size. 76 */ 77 size += NVM_WORD_SIZE_BASE_SHIFT; 78 79 /* Just in case size is out of range, cap it to the largest 80 * EEPROM size supported 81 */ 82 if (size > 15) 83 size = 15; 84 85 nvm->type = igc_nvm_eeprom_spi; 86 nvm->word_size = BIT(size); 87 nvm->opcode_bits = 8; 88 nvm->delay_usec = 1; 89 90 nvm->page_size = eecd & IGC_EECD_ADDR_BITS ? 32 : 8; 91 nvm->address_bits = eecd & IGC_EECD_ADDR_BITS ? 92 16 : 8; 93 94 if (nvm->word_size == BIT(15)) 95 nvm->page_size = 128; 96 97 return 0; 98 } 99 100 /** 101 * igc_setup_copper_link_base - Configure copper link settings 102 * @hw: pointer to the HW structure 103 * 104 * Configures the link for auto-neg or forced speed and duplex. Then we check 105 * for link, once link is established calls to configure collision distance 106 * and flow control are called. 107 */ 108 static s32 igc_setup_copper_link_base(struct igc_hw *hw) 109 { 110 s32 ret_val = 0; 111 u32 ctrl; 112 113 ctrl = rd32(IGC_CTRL); 114 ctrl |= IGC_CTRL_SLU; 115 ctrl &= ~(IGC_CTRL_FRCSPD | IGC_CTRL_FRCDPX); 116 wr32(IGC_CTRL, ctrl); 117 118 ret_val = igc_setup_copper_link(hw); 119 120 return ret_val; 121 } 122 123 /** 124 * igc_init_mac_params_base - Init MAC func ptrs. 125 * @hw: pointer to the HW structure 126 */ 127 static s32 igc_init_mac_params_base(struct igc_hw *hw) 128 { 129 struct igc_dev_spec_base *dev_spec = &hw->dev_spec._base; 130 struct igc_mac_info *mac = &hw->mac; 131 132 /* Set mta register count */ 133 mac->mta_reg_count = 128; 134 mac->rar_entry_count = IGC_RAR_ENTRIES; 135 136 /* reset */ 137 mac->ops.reset_hw = igc_reset_hw_base; 138 139 mac->ops.acquire_swfw_sync = igc_acquire_swfw_sync_i225; 140 mac->ops.release_swfw_sync = igc_release_swfw_sync_i225; 141 142 /* Allow a single clear of the SW semaphore on I225 */ 143 if (mac->type == igc_i225) 144 dev_spec->clear_semaphore_once = true; 145 146 /* physical interface link setup */ 147 mac->ops.setup_physical_interface = igc_setup_copper_link_base; 148 149 return 0; 150 } 151 152 /** 153 * igc_init_phy_params_base - Init PHY func ptrs. 154 * @hw: pointer to the HW structure 155 */ 156 static s32 igc_init_phy_params_base(struct igc_hw *hw) 157 { 158 struct igc_phy_info *phy = &hw->phy; 159 s32 ret_val = 0; 160 161 phy->autoneg_mask = AUTONEG_ADVERTISE_SPEED_DEFAULT_2500; 162 phy->reset_delay_us = 100; 163 164 /* set lan id */ 165 hw->bus.func = (rd32(IGC_STATUS) & IGC_STATUS_FUNC_MASK) >> 166 IGC_STATUS_FUNC_SHIFT; 167 168 /* Make sure the PHY is in a good state. Several people have reported 169 * firmware leaving the PHY's page select register set to something 170 * other than the default of zero, which causes the PHY ID read to 171 * access something other than the intended register. 172 */ 173 ret_val = hw->phy.ops.reset(hw); 174 if (ret_val) { 175 hw_dbg("Error resetting the PHY\n"); 176 goto out; 177 } 178 179 ret_val = igc_get_phy_id(hw); 180 if (ret_val) 181 return ret_val; 182 183 igc_check_for_copper_link(hw); 184 185 phy->type = igc_phy_i225; 186 187 out: 188 return ret_val; 189 } 190 191 static s32 igc_get_invariants_base(struct igc_hw *hw) 192 { 193 struct igc_mac_info *mac = &hw->mac; 194 s32 ret_val = 0; 195 196 switch (hw->device_id) { 197 case IGC_DEV_ID_I225_LM: 198 case IGC_DEV_ID_I225_V: 199 case IGC_DEV_ID_I225_I: 200 case IGC_DEV_ID_I220_V: 201 case IGC_DEV_ID_I225_K: 202 case IGC_DEV_ID_I225_K2: 203 case IGC_DEV_ID_I226_K: 204 case IGC_DEV_ID_I225_LMVP: 205 case IGC_DEV_ID_I226_LMVP: 206 case IGC_DEV_ID_I225_IT: 207 case IGC_DEV_ID_I226_LM: 208 case IGC_DEV_ID_I226_V: 209 case IGC_DEV_ID_I226_IT: 210 case IGC_DEV_ID_I221_V: 211 case IGC_DEV_ID_I226_BLANK_NVM: 212 case IGC_DEV_ID_I225_BLANK_NVM: 213 mac->type = igc_i225; 214 break; 215 default: 216 return -IGC_ERR_MAC_INIT; 217 } 218 219 hw->phy.media_type = igc_media_type_copper; 220 221 /* mac initialization and operations */ 222 ret_val = igc_init_mac_params_base(hw); 223 if (ret_val) 224 goto out; 225 226 /* NVM initialization */ 227 ret_val = igc_init_nvm_params_base(hw); 228 switch (hw->mac.type) { 229 case igc_i225: 230 ret_val = igc_init_nvm_params_i225(hw); 231 break; 232 default: 233 break; 234 } 235 236 /* setup PHY parameters */ 237 ret_val = igc_init_phy_params_base(hw); 238 if (ret_val) 239 goto out; 240 241 out: 242 return ret_val; 243 } 244 245 /** 246 * igc_acquire_phy_base - Acquire rights to access PHY 247 * @hw: pointer to the HW structure 248 * 249 * Acquire access rights to the correct PHY. This is a 250 * function pointer entry point called by the api module. 251 */ 252 static s32 igc_acquire_phy_base(struct igc_hw *hw) 253 { 254 u16 mask = IGC_SWFW_PHY0_SM; 255 256 return hw->mac.ops.acquire_swfw_sync(hw, mask); 257 } 258 259 /** 260 * igc_release_phy_base - Release rights to access PHY 261 * @hw: pointer to the HW structure 262 * 263 * A wrapper to release access rights to the correct PHY. This is a 264 * function pointer entry point called by the api module. 265 */ 266 static void igc_release_phy_base(struct igc_hw *hw) 267 { 268 u16 mask = IGC_SWFW_PHY0_SM; 269 270 hw->mac.ops.release_swfw_sync(hw, mask); 271 } 272 273 /** 274 * igc_init_hw_base - Initialize hardware 275 * @hw: pointer to the HW structure 276 * 277 * This inits the hardware readying it for operation. 278 */ 279 static s32 igc_init_hw_base(struct igc_hw *hw) 280 { 281 struct igc_mac_info *mac = &hw->mac; 282 u16 i, rar_count = mac->rar_entry_count; 283 s32 ret_val = 0; 284 285 /* Setup the receive address */ 286 igc_init_rx_addrs(hw, rar_count); 287 288 /* Zero out the Multicast HASH table */ 289 hw_dbg("Zeroing the MTA\n"); 290 for (i = 0; i < mac->mta_reg_count; i++) 291 array_wr32(IGC_MTA, i, 0); 292 293 /* Zero out the Unicast HASH table */ 294 hw_dbg("Zeroing the UTA\n"); 295 for (i = 0; i < mac->uta_reg_count; i++) 296 array_wr32(IGC_UTA, i, 0); 297 298 /* Setup link and flow control */ 299 ret_val = igc_setup_link(hw); 300 301 /* Clear all of the statistics registers (clear on read). It is 302 * important that we do this after we have tried to establish link 303 * because the symbol error count will increment wildly if there 304 * is no link. 305 */ 306 igc_clear_hw_cntrs_base(hw); 307 308 return ret_val; 309 } 310 311 /** 312 * igc_power_down_phy_copper_base - Remove link during PHY power down 313 * @hw: pointer to the HW structure 314 * 315 * In the case of a PHY power down to save power, or to turn off link during a 316 * driver unload, or wake on lan is not enabled, remove the link. 317 */ 318 void igc_power_down_phy_copper_base(struct igc_hw *hw) 319 { 320 /* If the management interface is not enabled, then power down */ 321 if (!(igc_enable_mng_pass_thru(hw) || igc_check_reset_block(hw))) 322 igc_power_down_phy_copper(hw); 323 } 324 325 /** 326 * igc_rx_fifo_flush_base - Clean rx fifo after Rx enable 327 * @hw: pointer to the HW structure 328 * 329 * After Rx enable, if manageability is enabled then there is likely some 330 * bad data at the start of the fifo and possibly in the DMA fifo. This 331 * function clears the fifos and flushes any packets that came in as rx was 332 * being enabled. 333 */ 334 void igc_rx_fifo_flush_base(struct igc_hw *hw) 335 { 336 u32 rctl, rlpml, rxdctl[4], rfctl, temp_rctl, rx_enabled; 337 int i, ms_wait; 338 339 /* disable IPv6 options as per hardware errata */ 340 rfctl = rd32(IGC_RFCTL); 341 rfctl |= IGC_RFCTL_IPV6_EX_DIS; 342 wr32(IGC_RFCTL, rfctl); 343 344 if (!(rd32(IGC_MANC) & IGC_MANC_RCV_TCO_EN)) 345 return; 346 347 /* Disable all Rx queues */ 348 for (i = 0; i < 4; i++) { 349 rxdctl[i] = rd32(IGC_RXDCTL(i)); 350 wr32(IGC_RXDCTL(i), 351 rxdctl[i] & ~IGC_RXDCTL_QUEUE_ENABLE); 352 } 353 /* Poll all queues to verify they have shut down */ 354 for (ms_wait = 0; ms_wait < 10; ms_wait++) { 355 usleep_range(1000, 2000); 356 rx_enabled = 0; 357 for (i = 0; i < 4; i++) 358 rx_enabled |= rd32(IGC_RXDCTL(i)); 359 if (!(rx_enabled & IGC_RXDCTL_QUEUE_ENABLE)) 360 break; 361 } 362 363 if (ms_wait == 10) 364 hw_dbg("Queue disable timed out after 10ms\n"); 365 366 /* Clear RLPML, RCTL.SBP, RFCTL.LEF, and set RCTL.LPE so that all 367 * incoming packets are rejected. Set enable and wait 2ms so that 368 * any packet that was coming in as RCTL.EN was set is flushed 369 */ 370 wr32(IGC_RFCTL, rfctl & ~IGC_RFCTL_LEF); 371 372 rlpml = rd32(IGC_RLPML); 373 wr32(IGC_RLPML, 0); 374 375 rctl = rd32(IGC_RCTL); 376 temp_rctl = rctl & ~(IGC_RCTL_EN | IGC_RCTL_SBP); 377 temp_rctl |= IGC_RCTL_LPE; 378 379 wr32(IGC_RCTL, temp_rctl); 380 wr32(IGC_RCTL, temp_rctl | IGC_RCTL_EN); 381 wrfl(); 382 usleep_range(2000, 3000); 383 384 /* Enable Rx queues that were previously enabled and restore our 385 * previous state 386 */ 387 for (i = 0; i < 4; i++) 388 wr32(IGC_RXDCTL(i), rxdctl[i]); 389 wr32(IGC_RCTL, rctl); 390 wrfl(); 391 392 wr32(IGC_RLPML, rlpml); 393 wr32(IGC_RFCTL, rfctl); 394 395 /* Flush receive errors generated by workaround */ 396 rd32(IGC_ROC); 397 rd32(IGC_RNBC); 398 rd32(IGC_MPC); 399 } 400 401 static struct igc_mac_operations igc_mac_ops_base = { 402 .init_hw = igc_init_hw_base, 403 .check_for_link = igc_check_for_copper_link, 404 .rar_set = igc_rar_set, 405 .read_mac_addr = igc_read_mac_addr, 406 .get_speed_and_duplex = igc_get_speed_and_duplex_copper, 407 }; 408 409 static const struct igc_phy_operations igc_phy_ops_base = { 410 .acquire = igc_acquire_phy_base, 411 .release = igc_release_phy_base, 412 .reset = igc_phy_hw_reset, 413 .read_reg = igc_read_phy_reg_gpy, 414 .write_reg = igc_write_phy_reg_gpy, 415 }; 416 417 const struct igc_info igc_base_info = { 418 .get_invariants = igc_get_invariants_base, 419 .mac_ops = &igc_mac_ops_base, 420 .phy_ops = &igc_phy_ops_base, 421 }; 422