1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2018 Intel Corporation */
4 #include <linux/delay.h>
13 * igc_reset_hw_base - Reset hardware
14 * @hw: pointer to the HW structure
16 * This resets the hardware into a known state. This is a
17 * function pointer entry point called by the api module.
19 static s32 igc_reset_hw_base(struct igc_hw *hw)
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.
27 ret_val = igc_disable_pcie_master(hw);
29 hw_dbg("PCI-E Master disable polling has failed\n");
31 hw_dbg("Masking off all interrupts\n");
32 wr32(IGC_IMC, 0xffffffff);
35 wr32(IGC_TCTL, IGC_TCTL_PSP);
38 usleep_range(10000, 20000);
40 ctrl = rd32(IGC_CTRL);
42 hw_dbg("Issuing a global reset to MAC\n");
43 wr32(IGC_CTRL, ctrl | IGC_CTRL_DEV_RST);
45 ret_val = igc_get_auto_rd_done(hw);
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.
51 hw_dbg("Auto Read Done did not complete\n");
54 /* Clear any pending interrupt events. */
55 wr32(IGC_IMC, 0xffffffff);
62 * igc_init_nvm_params_base - Init NVM func ptrs.
63 * @hw: pointer to the HW structure
65 static s32 igc_init_nvm_params_base(struct igc_hw *hw)
67 struct igc_nvm_info *nvm = &hw->nvm;
68 u32 eecd = rd32(IGC_EECD);
71 size = (u16)((eecd & IGC_EECD_SIZE_EX_MASK) >>
72 IGC_EECD_SIZE_EX_SHIFT);
74 /* Added to a constant, "size" becomes the left-shift value
75 * for setting word_size.
77 size += NVM_WORD_SIZE_BASE_SHIFT;
79 /* Just in case size is out of range, cap it to the largest
80 * EEPROM size supported
85 nvm->type = igc_nvm_eeprom_spi;
86 nvm->word_size = BIT(size);
90 nvm->page_size = eecd & IGC_EECD_ADDR_BITS ? 32 : 8;
91 nvm->address_bits = eecd & IGC_EECD_ADDR_BITS ?
94 if (nvm->word_size == BIT(15))
101 * igc_setup_copper_link_base - Configure copper link settings
102 * @hw: pointer to the HW structure
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.
108 static s32 igc_setup_copper_link_base(struct igc_hw *hw)
113 ctrl = rd32(IGC_CTRL);
114 ctrl |= IGC_CTRL_SLU;
115 ctrl &= ~(IGC_CTRL_FRCSPD | IGC_CTRL_FRCDPX);
116 wr32(IGC_CTRL, ctrl);
118 ret_val = igc_setup_copper_link(hw);
124 * igc_init_mac_params_base - Init MAC func ptrs.
125 * @hw: pointer to the HW structure
127 static s32 igc_init_mac_params_base(struct igc_hw *hw)
129 struct igc_dev_spec_base *dev_spec = &hw->dev_spec._base;
130 struct igc_mac_info *mac = &hw->mac;
132 /* Set mta register count */
133 mac->mta_reg_count = 128;
134 mac->rar_entry_count = IGC_RAR_ENTRIES;
137 mac->ops.reset_hw = igc_reset_hw_base;
139 mac->ops.acquire_swfw_sync = igc_acquire_swfw_sync_i225;
140 mac->ops.release_swfw_sync = igc_release_swfw_sync_i225;
142 /* Allow a single clear of the SW semaphore on I225 */
143 if (mac->type == igc_i225)
144 dev_spec->clear_semaphore_once = true;
146 /* physical interface link setup */
147 mac->ops.setup_physical_interface = igc_setup_copper_link_base;
153 * igc_init_phy_params_base - Init PHY func ptrs.
154 * @hw: pointer to the HW structure
156 static s32 igc_init_phy_params_base(struct igc_hw *hw)
158 struct igc_phy_info *phy = &hw->phy;
161 if (hw->phy.media_type != igc_media_type_copper) {
162 phy->type = igc_phy_none;
166 phy->autoneg_mask = AUTONEG_ADVERTISE_SPEED_DEFAULT_2500;
167 phy->reset_delay_us = 100;
170 hw->bus.func = (rd32(IGC_STATUS) & IGC_STATUS_FUNC_MASK) >>
171 IGC_STATUS_FUNC_SHIFT;
173 /* Make sure the PHY is in a good state. Several people have reported
174 * firmware leaving the PHY's page select register set to something
175 * other than the default of zero, which causes the PHY ID read to
176 * access something other than the intended register.
178 ret_val = hw->phy.ops.reset(hw);
180 hw_dbg("Error resetting the PHY\n");
184 ret_val = igc_get_phy_id(hw);
188 igc_check_for_copper_link(hw);
190 /* Verify phy id and set remaining function pointers */
193 phy->type = igc_phy_i225;
196 ret_val = -IGC_ERR_PHY;
204 static s32 igc_get_invariants_base(struct igc_hw *hw)
206 struct igc_mac_info *mac = &hw->mac;
209 switch (hw->device_id) {
210 case IGC_DEV_ID_I225_LM:
211 case IGC_DEV_ID_I225_V:
212 case IGC_DEV_ID_I225_I:
213 case IGC_DEV_ID_I220_V:
214 case IGC_DEV_ID_I225_K:
215 case IGC_DEV_ID_I225_K2:
216 case IGC_DEV_ID_I226_K:
217 case IGC_DEV_ID_I225_LMVP:
218 case IGC_DEV_ID_I225_IT:
219 case IGC_DEV_ID_I226_LM:
220 case IGC_DEV_ID_I226_V:
221 case IGC_DEV_ID_I226_IT:
222 case IGC_DEV_ID_I221_V:
223 case IGC_DEV_ID_I226_BLANK_NVM:
224 case IGC_DEV_ID_I225_BLANK_NVM:
225 mac->type = igc_i225;
228 return -IGC_ERR_MAC_INIT;
231 hw->phy.media_type = igc_media_type_copper;
233 /* mac initialization and operations */
234 ret_val = igc_init_mac_params_base(hw);
238 /* NVM initialization */
239 ret_val = igc_init_nvm_params_base(hw);
240 switch (hw->mac.type) {
242 ret_val = igc_init_nvm_params_i225(hw);
248 /* setup PHY parameters */
249 ret_val = igc_init_phy_params_base(hw);
258 * igc_acquire_phy_base - Acquire rights to access PHY
259 * @hw: pointer to the HW structure
261 * Acquire access rights to the correct PHY. This is a
262 * function pointer entry point called by the api module.
264 static s32 igc_acquire_phy_base(struct igc_hw *hw)
266 u16 mask = IGC_SWFW_PHY0_SM;
268 return hw->mac.ops.acquire_swfw_sync(hw, mask);
272 * igc_release_phy_base - Release rights to access PHY
273 * @hw: pointer to the HW structure
275 * A wrapper to release access rights to the correct PHY. This is a
276 * function pointer entry point called by the api module.
278 static void igc_release_phy_base(struct igc_hw *hw)
280 u16 mask = IGC_SWFW_PHY0_SM;
282 hw->mac.ops.release_swfw_sync(hw, mask);
286 * igc_init_hw_base - Initialize hardware
287 * @hw: pointer to the HW structure
289 * This inits the hardware readying it for operation.
291 static s32 igc_init_hw_base(struct igc_hw *hw)
293 struct igc_mac_info *mac = &hw->mac;
294 u16 i, rar_count = mac->rar_entry_count;
297 /* Setup the receive address */
298 igc_init_rx_addrs(hw, rar_count);
300 /* Zero out the Multicast HASH table */
301 hw_dbg("Zeroing the MTA\n");
302 for (i = 0; i < mac->mta_reg_count; i++)
303 array_wr32(IGC_MTA, i, 0);
305 /* Zero out the Unicast HASH table */
306 hw_dbg("Zeroing the UTA\n");
307 for (i = 0; i < mac->uta_reg_count; i++)
308 array_wr32(IGC_UTA, i, 0);
310 /* Setup link and flow control */
311 ret_val = igc_setup_link(hw);
313 /* Clear all of the statistics registers (clear on read). It is
314 * important that we do this after we have tried to establish link
315 * because the symbol error count will increment wildly if there
318 igc_clear_hw_cntrs_base(hw);
324 * igc_power_down_phy_copper_base - Remove link during PHY power down
325 * @hw: pointer to the HW structure
327 * In the case of a PHY power down to save power, or to turn off link during a
328 * driver unload, or wake on lan is not enabled, remove the link.
330 void igc_power_down_phy_copper_base(struct igc_hw *hw)
332 /* If the management interface is not enabled, then power down */
333 if (!(igc_enable_mng_pass_thru(hw) || igc_check_reset_block(hw)))
334 igc_power_down_phy_copper(hw);
338 * igc_rx_fifo_flush_base - Clean rx fifo after Rx enable
339 * @hw: pointer to the HW structure
341 * After Rx enable, if manageability is enabled then there is likely some
342 * bad data at the start of the fifo and possibly in the DMA fifo. This
343 * function clears the fifos and flushes any packets that came in as rx was
346 void igc_rx_fifo_flush_base(struct igc_hw *hw)
348 u32 rctl, rlpml, rxdctl[4], rfctl, temp_rctl, rx_enabled;
351 /* disable IPv6 options as per hardware errata */
352 rfctl = rd32(IGC_RFCTL);
353 rfctl |= IGC_RFCTL_IPV6_EX_DIS;
354 wr32(IGC_RFCTL, rfctl);
356 if (!(rd32(IGC_MANC) & IGC_MANC_RCV_TCO_EN))
359 /* Disable all Rx queues */
360 for (i = 0; i < 4; i++) {
361 rxdctl[i] = rd32(IGC_RXDCTL(i));
363 rxdctl[i] & ~IGC_RXDCTL_QUEUE_ENABLE);
365 /* Poll all queues to verify they have shut down */
366 for (ms_wait = 0; ms_wait < 10; ms_wait++) {
367 usleep_range(1000, 2000);
369 for (i = 0; i < 4; i++)
370 rx_enabled |= rd32(IGC_RXDCTL(i));
371 if (!(rx_enabled & IGC_RXDCTL_QUEUE_ENABLE))
376 hw_dbg("Queue disable timed out after 10ms\n");
378 /* Clear RLPML, RCTL.SBP, RFCTL.LEF, and set RCTL.LPE so that all
379 * incoming packets are rejected. Set enable and wait 2ms so that
380 * any packet that was coming in as RCTL.EN was set is flushed
382 wr32(IGC_RFCTL, rfctl & ~IGC_RFCTL_LEF);
384 rlpml = rd32(IGC_RLPML);
387 rctl = rd32(IGC_RCTL);
388 temp_rctl = rctl & ~(IGC_RCTL_EN | IGC_RCTL_SBP);
389 temp_rctl |= IGC_RCTL_LPE;
391 wr32(IGC_RCTL, temp_rctl);
392 wr32(IGC_RCTL, temp_rctl | IGC_RCTL_EN);
394 usleep_range(2000, 3000);
396 /* Enable Rx queues that were previously enabled and restore our
399 for (i = 0; i < 4; i++)
400 wr32(IGC_RXDCTL(i), rxdctl[i]);
401 wr32(IGC_RCTL, rctl);
404 wr32(IGC_RLPML, rlpml);
405 wr32(IGC_RFCTL, rfctl);
407 /* Flush receive errors generated by workaround */
413 static struct igc_mac_operations igc_mac_ops_base = {
414 .init_hw = igc_init_hw_base,
415 .check_for_link = igc_check_for_copper_link,
416 .rar_set = igc_rar_set,
417 .read_mac_addr = igc_read_mac_addr,
418 .get_speed_and_duplex = igc_get_speed_and_duplex_copper,
421 static const struct igc_phy_operations igc_phy_ops_base = {
422 .acquire = igc_acquire_phy_base,
423 .release = igc_release_phy_base,
424 .reset = igc_phy_hw_reset,
425 .read_reg = igc_read_phy_reg_gpy,
426 .write_reg = igc_write_phy_reg_gpy,
429 const struct igc_info igc_base_info = {
430 .get_invariants = igc_get_invariants_base,
431 .mac_ops = &igc_mac_ops_base,
432 .phy_ops = &igc_phy_ops_base,