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 */
igc_reset_hw_base(struct igc_hw * hw)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 */
igc_init_nvm_params_base(struct igc_hw * hw)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 /* failed to read reg and got all F's */
72 if (!(~eecd))
73 return -ENXIO;
74
75 size = FIELD_GET(IGC_EECD_SIZE_EX_MASK, eecd);
76
77 /* Added to a constant, "size" becomes the left-shift value
78 * for setting word_size.
79 */
80 size += NVM_WORD_SIZE_BASE_SHIFT;
81
82 /* Just in case size is out of range, cap it to the largest
83 * EEPROM size supported
84 */
85 if (size > 15)
86 size = 15;
87
88 nvm->type = igc_nvm_eeprom_spi;
89 nvm->word_size = BIT(size);
90 nvm->opcode_bits = 8;
91 nvm->delay_usec = 1;
92
93 nvm->page_size = eecd & IGC_EECD_ADDR_BITS ? 32 : 8;
94 nvm->address_bits = eecd & IGC_EECD_ADDR_BITS ?
95 16 : 8;
96
97 if (nvm->word_size == BIT(15))
98 nvm->page_size = 128;
99
100 return 0;
101 }
102
103 /**
104 * igc_setup_copper_link_base - Configure copper link settings
105 * @hw: pointer to the HW structure
106 *
107 * Configures the link for auto-neg or forced speed and duplex. Then we check
108 * for link, once link is established calls to configure collision distance
109 * and flow control are called.
110 */
igc_setup_copper_link_base(struct igc_hw * hw)111 static s32 igc_setup_copper_link_base(struct igc_hw *hw)
112 {
113 s32 ret_val = 0;
114 u32 ctrl;
115
116 ctrl = rd32(IGC_CTRL);
117 ctrl |= IGC_CTRL_SLU;
118 ctrl &= ~(IGC_CTRL_FRCSPD | IGC_CTRL_FRCDPX);
119 wr32(IGC_CTRL, ctrl);
120
121 ret_val = igc_setup_copper_link(hw);
122
123 return ret_val;
124 }
125
126 /**
127 * igc_init_mac_params_base - Init MAC func ptrs.
128 * @hw: pointer to the HW structure
129 */
igc_init_mac_params_base(struct igc_hw * hw)130 static s32 igc_init_mac_params_base(struct igc_hw *hw)
131 {
132 struct igc_dev_spec_base *dev_spec = &hw->dev_spec._base;
133 struct igc_mac_info *mac = &hw->mac;
134
135 /* Set mta register count */
136 mac->mta_reg_count = 128;
137 mac->rar_entry_count = IGC_RAR_ENTRIES;
138
139 /* reset */
140 mac->ops.reset_hw = igc_reset_hw_base;
141
142 mac->ops.acquire_swfw_sync = igc_acquire_swfw_sync_i225;
143 mac->ops.release_swfw_sync = igc_release_swfw_sync_i225;
144
145 /* Allow a single clear of the SW semaphore on I225 */
146 if (mac->type == igc_i225)
147 dev_spec->clear_semaphore_once = true;
148
149 /* physical interface link setup */
150 mac->ops.setup_physical_interface = igc_setup_copper_link_base;
151
152 return 0;
153 }
154
155 /**
156 * igc_init_phy_params_base - Init PHY func ptrs.
157 * @hw: pointer to the HW structure
158 */
igc_init_phy_params_base(struct igc_hw * hw)159 static s32 igc_init_phy_params_base(struct igc_hw *hw)
160 {
161 struct igc_phy_info *phy = &hw->phy;
162 s32 ret_val = 0;
163
164 phy->autoneg_mask = AUTONEG_ADVERTISE_SPEED_DEFAULT_2500;
165 phy->reset_delay_us = 100;
166
167 /* set lan id */
168 hw->bus.func = FIELD_GET(IGC_STATUS_FUNC_MASK, rd32(IGC_STATUS));
169
170 /* Make sure the PHY is in a good state. Several people have reported
171 * firmware leaving the PHY's page select register set to something
172 * other than the default of zero, which causes the PHY ID read to
173 * access something other than the intended register.
174 */
175 ret_val = hw->phy.ops.reset(hw);
176 if (ret_val) {
177 hw_dbg("Error resetting the PHY\n");
178 goto out;
179 }
180
181 ret_val = igc_get_phy_id(hw);
182 if (ret_val)
183 return ret_val;
184
185 igc_check_for_copper_link(hw);
186
187 out:
188 return ret_val;
189 }
190
igc_get_invariants_base(struct igc_hw * hw)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 if (ret_val)
229 goto out;
230 switch (hw->mac.type) {
231 case igc_i225:
232 ret_val = igc_init_nvm_params_i225(hw);
233 break;
234 default:
235 break;
236 }
237
238 /* setup PHY parameters */
239 ret_val = igc_init_phy_params_base(hw);
240 if (ret_val)
241 goto out;
242
243 out:
244 return ret_val;
245 }
246
247 /**
248 * igc_acquire_phy_base - Acquire rights to access PHY
249 * @hw: pointer to the HW structure
250 *
251 * Acquire access rights to the correct PHY. This is a
252 * function pointer entry point called by the api module.
253 */
igc_acquire_phy_base(struct igc_hw * hw)254 static s32 igc_acquire_phy_base(struct igc_hw *hw)
255 {
256 u16 mask = IGC_SWFW_PHY0_SM;
257
258 return hw->mac.ops.acquire_swfw_sync(hw, mask);
259 }
260
261 /**
262 * igc_release_phy_base - Release rights to access PHY
263 * @hw: pointer to the HW structure
264 *
265 * A wrapper to release access rights to the correct PHY. This is a
266 * function pointer entry point called by the api module.
267 */
igc_release_phy_base(struct igc_hw * hw)268 static void igc_release_phy_base(struct igc_hw *hw)
269 {
270 u16 mask = IGC_SWFW_PHY0_SM;
271
272 hw->mac.ops.release_swfw_sync(hw, mask);
273 }
274
275 /**
276 * igc_init_hw_base - Initialize hardware
277 * @hw: pointer to the HW structure
278 *
279 * This inits the hardware readying it for operation.
280 */
igc_init_hw_base(struct igc_hw * hw)281 static s32 igc_init_hw_base(struct igc_hw *hw)
282 {
283 struct igc_mac_info *mac = &hw->mac;
284 u16 i, rar_count = mac->rar_entry_count;
285 s32 ret_val = 0;
286
287 /* Setup the receive address */
288 igc_init_rx_addrs(hw, rar_count);
289
290 /* Zero out the Multicast HASH table */
291 hw_dbg("Zeroing the MTA\n");
292 for (i = 0; i < mac->mta_reg_count; i++)
293 array_wr32(IGC_MTA, i, 0);
294
295 /* Zero out the Unicast HASH table */
296 hw_dbg("Zeroing the UTA\n");
297 for (i = 0; i < mac->uta_reg_count; i++)
298 array_wr32(IGC_UTA, i, 0);
299
300 /* Setup link and flow control */
301 ret_val = igc_setup_link(hw);
302
303 /* Clear all of the statistics registers (clear on read). It is
304 * important that we do this after we have tried to establish link
305 * because the symbol error count will increment wildly if there
306 * is no link.
307 */
308 igc_clear_hw_cntrs_base(hw);
309
310 return ret_val;
311 }
312
313 /**
314 * igc_power_down_phy_copper_base - Remove link during PHY power down
315 * @hw: pointer to the HW structure
316 *
317 * In the case of a PHY power down to save power, or to turn off link during a
318 * driver unload, or wake on lan is not enabled, remove the link.
319 */
igc_power_down_phy_copper_base(struct igc_hw * hw)320 void igc_power_down_phy_copper_base(struct igc_hw *hw)
321 {
322 /* If the management interface is not enabled, then power down */
323 if (!(igc_enable_mng_pass_thru(hw) || igc_check_reset_block(hw)))
324 igc_power_down_phy_copper(hw);
325 }
326
327 /**
328 * igc_rx_fifo_flush_base - Clean rx fifo after Rx enable
329 * @hw: pointer to the HW structure
330 *
331 * After Rx enable, if manageability is enabled then there is likely some
332 * bad data at the start of the fifo and possibly in the DMA fifo. This
333 * function clears the fifos and flushes any packets that came in as rx was
334 * being enabled.
335 */
igc_rx_fifo_flush_base(struct igc_hw * hw)336 void igc_rx_fifo_flush_base(struct igc_hw *hw)
337 {
338 u32 rctl, rlpml, rxdctl[4], rfctl, temp_rctl, rx_enabled;
339 int i, ms_wait;
340
341 /* disable IPv6 options as per hardware errata */
342 rfctl = rd32(IGC_RFCTL);
343 rfctl |= IGC_RFCTL_IPV6_EX_DIS;
344 wr32(IGC_RFCTL, rfctl);
345
346 if (!(rd32(IGC_MANC) & IGC_MANC_RCV_TCO_EN))
347 return;
348
349 /* Disable all Rx queues */
350 for (i = 0; i < 4; i++) {
351 rxdctl[i] = rd32(IGC_RXDCTL(i));
352 wr32(IGC_RXDCTL(i),
353 rxdctl[i] & ~IGC_RXDCTL_QUEUE_ENABLE);
354 }
355 /* Poll all queues to verify they have shut down */
356 for (ms_wait = 0; ms_wait < 10; ms_wait++) {
357 usleep_range(1000, 2000);
358 rx_enabled = 0;
359 for (i = 0; i < 4; i++)
360 rx_enabled |= rd32(IGC_RXDCTL(i));
361 if (!(rx_enabled & IGC_RXDCTL_QUEUE_ENABLE))
362 break;
363 }
364
365 if (ms_wait == 10)
366 hw_dbg("Queue disable timed out after 10ms\n");
367
368 /* Clear RLPML, RCTL.SBP, RFCTL.LEF, and set RCTL.LPE so that all
369 * incoming packets are rejected. Set enable and wait 2ms so that
370 * any packet that was coming in as RCTL.EN was set is flushed
371 */
372 wr32(IGC_RFCTL, rfctl & ~IGC_RFCTL_LEF);
373
374 rlpml = rd32(IGC_RLPML);
375 wr32(IGC_RLPML, 0);
376
377 rctl = rd32(IGC_RCTL);
378 temp_rctl = rctl & ~(IGC_RCTL_EN | IGC_RCTL_SBP);
379 temp_rctl |= IGC_RCTL_LPE;
380
381 wr32(IGC_RCTL, temp_rctl);
382 wr32(IGC_RCTL, temp_rctl | IGC_RCTL_EN);
383 wrfl();
384 usleep_range(2000, 3000);
385
386 /* Enable Rx queues that were previously enabled and restore our
387 * previous state
388 */
389 for (i = 0; i < 4; i++)
390 wr32(IGC_RXDCTL(i), rxdctl[i]);
391 wr32(IGC_RCTL, rctl);
392 wrfl();
393
394 wr32(IGC_RLPML, rlpml);
395 wr32(IGC_RFCTL, rfctl);
396
397 /* Flush receive errors generated by workaround */
398 rd32(IGC_ROC);
399 rd32(IGC_RNBC);
400 rd32(IGC_MPC);
401 }
402
igc_is_device_id_i225(struct igc_hw * hw)403 bool igc_is_device_id_i225(struct igc_hw *hw)
404 {
405 switch (hw->device_id) {
406 case IGC_DEV_ID_I225_LM:
407 case IGC_DEV_ID_I225_V:
408 case IGC_DEV_ID_I225_I:
409 case IGC_DEV_ID_I225_K:
410 case IGC_DEV_ID_I225_K2:
411 case IGC_DEV_ID_I225_LMVP:
412 case IGC_DEV_ID_I225_IT:
413 return true;
414 default:
415 return false;
416 }
417 }
418
igc_is_device_id_i226(struct igc_hw * hw)419 bool igc_is_device_id_i226(struct igc_hw *hw)
420 {
421 switch (hw->device_id) {
422 case IGC_DEV_ID_I226_LM:
423 case IGC_DEV_ID_I226_V:
424 case IGC_DEV_ID_I226_K:
425 case IGC_DEV_ID_I226_IT:
426 return true;
427 default:
428 return false;
429 }
430 }
431
432 static struct igc_mac_operations igc_mac_ops_base = {
433 .init_hw = igc_init_hw_base,
434 .check_for_link = igc_check_for_copper_link,
435 .rar_set = igc_rar_set,
436 .read_mac_addr = igc_read_mac_addr,
437 .get_speed_and_duplex = igc_get_speed_and_duplex_copper,
438 };
439
440 static const struct igc_phy_operations igc_phy_ops_base = {
441 .acquire = igc_acquire_phy_base,
442 .release = igc_release_phy_base,
443 .reset = igc_phy_hw_reset,
444 .read_reg = igc_read_phy_reg_gpy,
445 .write_reg = igc_write_phy_reg_gpy,
446 };
447
448 const struct igc_info igc_base_info = {
449 .get_invariants = igc_get_invariants_base,
450 .mac_ops = &igc_mac_ops_base,
451 .phy_ops = &igc_phy_ops_base,
452 };
453