1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 1999 - 2018 Intel Corporation. */
3 
4 #include <linux/pci.h>
5 #include <linux/delay.h>
6 #include <linux/sched.h>
7 
8 #include "ixgbe.h"
9 #include "ixgbe_phy.h"
10 #include "ixgbe_x540.h"
11 
12 #define IXGBE_X540_MAX_TX_QUEUES	128
13 #define IXGBE_X540_MAX_RX_QUEUES	128
14 #define IXGBE_X540_RAR_ENTRIES		128
15 #define IXGBE_X540_MC_TBL_SIZE		128
16 #define IXGBE_X540_VFT_TBL_SIZE		128
17 #define IXGBE_X540_RX_PB_SIZE		384
18 
19 static s32 ixgbe_update_flash_X540(struct ixgbe_hw *hw);
20 static s32 ixgbe_poll_flash_update_done_X540(struct ixgbe_hw *hw);
21 static s32 ixgbe_get_swfw_sync_semaphore(struct ixgbe_hw *hw);
22 static void ixgbe_release_swfw_sync_semaphore(struct ixgbe_hw *hw);
23 
24 enum ixgbe_media_type ixgbe_get_media_type_X540(struct ixgbe_hw *hw)
25 {
26 	return ixgbe_media_type_copper;
27 }
28 
29 s32 ixgbe_get_invariants_X540(struct ixgbe_hw *hw)
30 {
31 	struct ixgbe_mac_info *mac = &hw->mac;
32 	struct ixgbe_phy_info *phy = &hw->phy;
33 
34 	/* set_phy_power was set by default to NULL */
35 	phy->ops.set_phy_power = ixgbe_set_copper_phy_power;
36 
37 	mac->mcft_size = IXGBE_X540_MC_TBL_SIZE;
38 	mac->vft_size = IXGBE_X540_VFT_TBL_SIZE;
39 	mac->num_rar_entries = IXGBE_X540_RAR_ENTRIES;
40 	mac->rx_pb_size = IXGBE_X540_RX_PB_SIZE;
41 	mac->max_rx_queues = IXGBE_X540_MAX_RX_QUEUES;
42 	mac->max_tx_queues = IXGBE_X540_MAX_TX_QUEUES;
43 	mac->max_msix_vectors = ixgbe_get_pcie_msix_count_generic(hw);
44 
45 	return 0;
46 }
47 
48 /**
49  *  ixgbe_setup_mac_link_X540 - Set the auto advertised capabilitires
50  *  @hw: pointer to hardware structure
51  *  @speed: new link speed
52  *  @autoneg_wait_to_complete: true when waiting for completion is needed
53  **/
54 s32 ixgbe_setup_mac_link_X540(struct ixgbe_hw *hw, ixgbe_link_speed speed,
55 			      bool autoneg_wait_to_complete)
56 {
57 	return hw->phy.ops.setup_link_speed(hw, speed,
58 					    autoneg_wait_to_complete);
59 }
60 
61 /**
62  *  ixgbe_reset_hw_X540 - Perform hardware reset
63  *  @hw: pointer to hardware structure
64  *
65  *  Resets the hardware by resetting the transmit and receive units, masks
66  *  and clears all interrupts, perform a PHY reset, and perform a link (MAC)
67  *  reset.
68  **/
69 s32 ixgbe_reset_hw_X540(struct ixgbe_hw *hw)
70 {
71 	s32 status;
72 	u32 ctrl, i;
73 	u32 swfw_mask = hw->phy.phy_semaphore_mask;
74 
75 	/* Call adapter stop to disable tx/rx and clear interrupts */
76 	status = hw->mac.ops.stop_adapter(hw);
77 	if (status)
78 		return status;
79 
80 	/* flush pending Tx transactions */
81 	ixgbe_clear_tx_pending(hw);
82 
83 mac_reset_top:
84 	status = hw->mac.ops.acquire_swfw_sync(hw, swfw_mask);
85 	if (status) {
86 		hw_dbg(hw, "semaphore failed with %d", status);
87 		return IXGBE_ERR_SWFW_SYNC;
88 	}
89 
90 	ctrl = IXGBE_CTRL_RST;
91 	ctrl |= IXGBE_READ_REG(hw, IXGBE_CTRL);
92 	IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
93 	IXGBE_WRITE_FLUSH(hw);
94 	hw->mac.ops.release_swfw_sync(hw, swfw_mask);
95 	usleep_range(1000, 1200);
96 
97 	/* Poll for reset bit to self-clear indicating reset is complete */
98 	for (i = 0; i < 10; i++) {
99 		ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
100 		if (!(ctrl & IXGBE_CTRL_RST_MASK))
101 			break;
102 		udelay(1);
103 	}
104 
105 	if (ctrl & IXGBE_CTRL_RST_MASK) {
106 		status = IXGBE_ERR_RESET_FAILED;
107 		hw_dbg(hw, "Reset polling failed to complete.\n");
108 	}
109 	msleep(100);
110 
111 	/*
112 	 * Double resets are required for recovery from certain error
113 	 * conditions.  Between resets, it is necessary to stall to allow time
114 	 * for any pending HW events to complete.
115 	 */
116 	if (hw->mac.flags & IXGBE_FLAGS_DOUBLE_RESET_REQUIRED) {
117 		hw->mac.flags &= ~IXGBE_FLAGS_DOUBLE_RESET_REQUIRED;
118 		goto mac_reset_top;
119 	}
120 
121 	/* Set the Rx packet buffer size. */
122 	IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(0), 384 << IXGBE_RXPBSIZE_SHIFT);
123 
124 	/* Store the permanent mac address */
125 	hw->mac.ops.get_mac_addr(hw, hw->mac.perm_addr);
126 
127 	/*
128 	 * Store MAC address from RAR0, clear receive address registers, and
129 	 * clear the multicast table.  Also reset num_rar_entries to 128,
130 	 * since we modify this value when programming the SAN MAC address.
131 	 */
132 	hw->mac.num_rar_entries = IXGBE_X540_MAX_TX_QUEUES;
133 	hw->mac.ops.init_rx_addrs(hw);
134 
135 	/* Store the permanent SAN mac address */
136 	hw->mac.ops.get_san_mac_addr(hw, hw->mac.san_addr);
137 
138 	/* Add the SAN MAC address to the RAR only if it's a valid address */
139 	if (is_valid_ether_addr(hw->mac.san_addr)) {
140 		/* Save the SAN MAC RAR index */
141 		hw->mac.san_mac_rar_index = hw->mac.num_rar_entries - 1;
142 
143 		hw->mac.ops.set_rar(hw, hw->mac.san_mac_rar_index,
144 				    hw->mac.san_addr, 0, IXGBE_RAH_AV);
145 
146 		/* clear VMDq pool/queue selection for this RAR */
147 		hw->mac.ops.clear_vmdq(hw, hw->mac.san_mac_rar_index,
148 				       IXGBE_CLEAR_VMDQ_ALL);
149 
150 		/* Reserve the last RAR for the SAN MAC address */
151 		hw->mac.num_rar_entries--;
152 	}
153 
154 	/* Store the alternative WWNN/WWPN prefix */
155 	hw->mac.ops.get_wwn_prefix(hw, &hw->mac.wwnn_prefix,
156 				   &hw->mac.wwpn_prefix);
157 
158 	return status;
159 }
160 
161 /**
162  *  ixgbe_start_hw_X540 - Prepare hardware for Tx/Rx
163  *  @hw: pointer to hardware structure
164  *
165  *  Starts the hardware using the generic start_hw function
166  *  and the generation start_hw function.
167  *  Then performs revision-specific operations, if any.
168  **/
169 s32 ixgbe_start_hw_X540(struct ixgbe_hw *hw)
170 {
171 	s32 ret_val;
172 
173 	ret_val = ixgbe_start_hw_generic(hw);
174 	if (ret_val)
175 		return ret_val;
176 
177 	return ixgbe_start_hw_gen2(hw);
178 }
179 
180 /**
181  *  ixgbe_init_eeprom_params_X540 - Initialize EEPROM params
182  *  @hw: pointer to hardware structure
183  *
184  *  Initializes the EEPROM parameters ixgbe_eeprom_info within the
185  *  ixgbe_hw struct in order to set up EEPROM access.
186  **/
187 s32 ixgbe_init_eeprom_params_X540(struct ixgbe_hw *hw)
188 {
189 	struct ixgbe_eeprom_info *eeprom = &hw->eeprom;
190 	u32 eec;
191 	u16 eeprom_size;
192 
193 	if (eeprom->type == ixgbe_eeprom_uninitialized) {
194 		eeprom->semaphore_delay = 10;
195 		eeprom->type = ixgbe_flash;
196 
197 		eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));
198 		eeprom_size = (u16)((eec & IXGBE_EEC_SIZE) >>
199 				    IXGBE_EEC_SIZE_SHIFT);
200 		eeprom->word_size = BIT(eeprom_size +
201 					IXGBE_EEPROM_WORD_SIZE_SHIFT);
202 
203 		hw_dbg(hw, "Eeprom params: type = %d, size = %d\n",
204 		       eeprom->type, eeprom->word_size);
205 	}
206 
207 	return 0;
208 }
209 
210 /**
211  *  ixgbe_read_eerd_X540- Read EEPROM word using EERD
212  *  @hw: pointer to hardware structure
213  *  @offset: offset of  word in the EEPROM to read
214  *  @data: word read from the EEPROM
215  *
216  *  Reads a 16 bit word from the EEPROM using the EERD register.
217  **/
218 static s32 ixgbe_read_eerd_X540(struct ixgbe_hw *hw, u16 offset, u16 *data)
219 {
220 	s32 status;
221 
222 	if (hw->mac.ops.acquire_swfw_sync(hw, IXGBE_GSSR_EEP_SM))
223 		return IXGBE_ERR_SWFW_SYNC;
224 
225 	status = ixgbe_read_eerd_generic(hw, offset, data);
226 
227 	hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_EEP_SM);
228 	return status;
229 }
230 
231 /**
232  *  ixgbe_read_eerd_buffer_X540 - Read EEPROM word(s) using EERD
233  *  @hw: pointer to hardware structure
234  *  @offset: offset of  word in the EEPROM to read
235  *  @words: number of words
236  *  @data: word(s) read from the EEPROM
237  *
238  *  Reads a 16 bit word(s) from the EEPROM using the EERD register.
239  **/
240 static s32 ixgbe_read_eerd_buffer_X540(struct ixgbe_hw *hw,
241 				       u16 offset, u16 words, u16 *data)
242 {
243 	s32 status;
244 
245 	if (hw->mac.ops.acquire_swfw_sync(hw, IXGBE_GSSR_EEP_SM))
246 		return IXGBE_ERR_SWFW_SYNC;
247 
248 	status = ixgbe_read_eerd_buffer_generic(hw, offset, words, data);
249 
250 	hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_EEP_SM);
251 	return status;
252 }
253 
254 /**
255  *  ixgbe_write_eewr_X540 - Write EEPROM word using EEWR
256  *  @hw: pointer to hardware structure
257  *  @offset: offset of  word in the EEPROM to write
258  *  @data: word write to the EEPROM
259  *
260  *  Write a 16 bit word to the EEPROM using the EEWR register.
261  **/
262 static s32 ixgbe_write_eewr_X540(struct ixgbe_hw *hw, u16 offset, u16 data)
263 {
264 	s32 status;
265 
266 	if (hw->mac.ops.acquire_swfw_sync(hw, IXGBE_GSSR_EEP_SM))
267 		return IXGBE_ERR_SWFW_SYNC;
268 
269 	status = ixgbe_write_eewr_generic(hw, offset, data);
270 
271 	hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_EEP_SM);
272 	return status;
273 }
274 
275 /**
276  *  ixgbe_write_eewr_buffer_X540 - Write EEPROM word(s) using EEWR
277  *  @hw: pointer to hardware structure
278  *  @offset: offset of  word in the EEPROM to write
279  *  @words: number of words
280  *  @data: word(s) write to the EEPROM
281  *
282  *  Write a 16 bit word(s) to the EEPROM using the EEWR register.
283  **/
284 static s32 ixgbe_write_eewr_buffer_X540(struct ixgbe_hw *hw,
285 					u16 offset, u16 words, u16 *data)
286 {
287 	s32 status;
288 
289 	if (hw->mac.ops.acquire_swfw_sync(hw, IXGBE_GSSR_EEP_SM))
290 		return IXGBE_ERR_SWFW_SYNC;
291 
292 	status = ixgbe_write_eewr_buffer_generic(hw, offset, words, data);
293 
294 	hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_EEP_SM);
295 	return status;
296 }
297 
298 /**
299  *  ixgbe_calc_eeprom_checksum_X540 - Calculates and returns the checksum
300  *
301  *  This function does not use synchronization for EERD and EEWR. It can
302  *  be used internally by function which utilize ixgbe_acquire_swfw_sync_X540.
303  *
304  *  @hw: pointer to hardware structure
305  **/
306 static s32 ixgbe_calc_eeprom_checksum_X540(struct ixgbe_hw *hw)
307 {
308 	u16 i;
309 	u16 j;
310 	u16 checksum = 0;
311 	u16 length = 0;
312 	u16 pointer = 0;
313 	u16 word = 0;
314 	u16 checksum_last_word = IXGBE_EEPROM_CHECKSUM;
315 	u16 ptr_start = IXGBE_PCIE_ANALOG_PTR;
316 
317 	/*
318 	 * Do not use hw->eeprom.ops.read because we do not want to take
319 	 * the synchronization semaphores here. Instead use
320 	 * ixgbe_read_eerd_generic
321 	 */
322 
323 	/* Include 0x0-0x3F in the checksum */
324 	for (i = 0; i < checksum_last_word; i++) {
325 		if (ixgbe_read_eerd_generic(hw, i, &word)) {
326 			hw_dbg(hw, "EEPROM read failed\n");
327 			return IXGBE_ERR_EEPROM;
328 		}
329 		checksum += word;
330 	}
331 
332 	/*
333 	 * Include all data from pointers 0x3, 0x6-0xE.  This excludes the
334 	 * FW, PHY module, and PCIe Expansion/Option ROM pointers.
335 	 */
336 	for (i = ptr_start; i < IXGBE_FW_PTR; i++) {
337 		if (i == IXGBE_PHY_PTR || i == IXGBE_OPTION_ROM_PTR)
338 			continue;
339 
340 		if (ixgbe_read_eerd_generic(hw, i, &pointer)) {
341 			hw_dbg(hw, "EEPROM read failed\n");
342 			break;
343 		}
344 
345 		/* Skip pointer section if the pointer is invalid. */
346 		if (pointer == 0xFFFF || pointer == 0 ||
347 		    pointer >= hw->eeprom.word_size)
348 			continue;
349 
350 		if (ixgbe_read_eerd_generic(hw, pointer, &length)) {
351 			hw_dbg(hw, "EEPROM read failed\n");
352 			return IXGBE_ERR_EEPROM;
353 		}
354 
355 		/* Skip pointer section if length is invalid. */
356 		if (length == 0xFFFF || length == 0 ||
357 		    (pointer + length) >= hw->eeprom.word_size)
358 			continue;
359 
360 		for (j = pointer + 1; j <= pointer + length; j++) {
361 			if (ixgbe_read_eerd_generic(hw, j, &word)) {
362 				hw_dbg(hw, "EEPROM read failed\n");
363 				return IXGBE_ERR_EEPROM;
364 			}
365 			checksum += word;
366 		}
367 	}
368 
369 	checksum = (u16)IXGBE_EEPROM_SUM - checksum;
370 
371 	return (s32)checksum;
372 }
373 
374 /**
375  *  ixgbe_validate_eeprom_checksum_X540 - Validate EEPROM checksum
376  *  @hw: pointer to hardware structure
377  *  @checksum_val: calculated checksum
378  *
379  *  Performs checksum calculation and validates the EEPROM checksum.  If the
380  *  caller does not need checksum_val, the value can be NULL.
381  **/
382 static s32 ixgbe_validate_eeprom_checksum_X540(struct ixgbe_hw *hw,
383 					       u16 *checksum_val)
384 {
385 	s32 status;
386 	u16 checksum;
387 	u16 read_checksum = 0;
388 
389 	/* Read the first word from the EEPROM. If this times out or fails, do
390 	 * not continue or we could be in for a very long wait while every
391 	 * EEPROM read fails
392 	 */
393 	status = hw->eeprom.ops.read(hw, 0, &checksum);
394 	if (status) {
395 		hw_dbg(hw, "EEPROM read failed\n");
396 		return status;
397 	}
398 
399 	if (hw->mac.ops.acquire_swfw_sync(hw, IXGBE_GSSR_EEP_SM))
400 		return IXGBE_ERR_SWFW_SYNC;
401 
402 	status = hw->eeprom.ops.calc_checksum(hw);
403 	if (status < 0)
404 		goto out;
405 
406 	checksum = (u16)(status & 0xffff);
407 
408 	/* Do not use hw->eeprom.ops.read because we do not want to take
409 	 * the synchronization semaphores twice here.
410 	 */
411 	status = ixgbe_read_eerd_generic(hw, IXGBE_EEPROM_CHECKSUM,
412 					 &read_checksum);
413 	if (status)
414 		goto out;
415 
416 	/* Verify read checksum from EEPROM is the same as
417 	 * calculated checksum
418 	 */
419 	if (read_checksum != checksum) {
420 		hw_dbg(hw, "Invalid EEPROM checksum");
421 		status = IXGBE_ERR_EEPROM_CHECKSUM;
422 	}
423 
424 	/* If the user cares, return the calculated checksum */
425 	if (checksum_val)
426 		*checksum_val = checksum;
427 
428 out:
429 	hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_EEP_SM);
430 
431 	return status;
432 }
433 
434 /**
435  * ixgbe_update_eeprom_checksum_X540 - Updates the EEPROM checksum and flash
436  * @hw: pointer to hardware structure
437  *
438  * After writing EEPROM to shadow RAM using EEWR register, software calculates
439  * checksum and updates the EEPROM and instructs the hardware to update
440  * the flash.
441  **/
442 static s32 ixgbe_update_eeprom_checksum_X540(struct ixgbe_hw *hw)
443 {
444 	s32 status;
445 	u16 checksum;
446 
447 	/* Read the first word from the EEPROM. If this times out or fails, do
448 	 * not continue or we could be in for a very long wait while every
449 	 * EEPROM read fails
450 	 */
451 	status = hw->eeprom.ops.read(hw, 0, &checksum);
452 	if (status) {
453 		hw_dbg(hw, "EEPROM read failed\n");
454 		return status;
455 	}
456 
457 	if (hw->mac.ops.acquire_swfw_sync(hw, IXGBE_GSSR_EEP_SM))
458 		return  IXGBE_ERR_SWFW_SYNC;
459 
460 	status = hw->eeprom.ops.calc_checksum(hw);
461 	if (status < 0)
462 		goto out;
463 
464 	checksum = (u16)(status & 0xffff);
465 
466 	/* Do not use hw->eeprom.ops.write because we do not want to
467 	 * take the synchronization semaphores twice here.
468 	 */
469 	status = ixgbe_write_eewr_generic(hw, IXGBE_EEPROM_CHECKSUM, checksum);
470 	if (status)
471 		goto out;
472 
473 	status = ixgbe_update_flash_X540(hw);
474 
475 out:
476 	hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_EEP_SM);
477 	return status;
478 }
479 
480 /**
481  * ixgbe_update_flash_X540 - Instruct HW to copy EEPROM to Flash device
482  * @hw: pointer to hardware structure
483  *
484  * Set FLUP (bit 23) of the EEC register to instruct Hardware to copy
485  * EEPROM from shadow RAM to the flash device.
486  **/
487 static s32 ixgbe_update_flash_X540(struct ixgbe_hw *hw)
488 {
489 	u32 flup;
490 	s32 status;
491 
492 	status = ixgbe_poll_flash_update_done_X540(hw);
493 	if (status == IXGBE_ERR_EEPROM) {
494 		hw_dbg(hw, "Flash update time out\n");
495 		return status;
496 	}
497 
498 	flup = IXGBE_READ_REG(hw, IXGBE_EEC(hw)) | IXGBE_EEC_FLUP;
499 	IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), flup);
500 
501 	status = ixgbe_poll_flash_update_done_X540(hw);
502 	if (status == 0)
503 		hw_dbg(hw, "Flash update complete\n");
504 	else
505 		hw_dbg(hw, "Flash update time out\n");
506 
507 	if (hw->revision_id == 0) {
508 		flup = IXGBE_READ_REG(hw, IXGBE_EEC(hw));
509 
510 		if (flup & IXGBE_EEC_SEC1VAL) {
511 			flup |= IXGBE_EEC_FLUP;
512 			IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), flup);
513 		}
514 
515 		status = ixgbe_poll_flash_update_done_X540(hw);
516 		if (status == 0)
517 			hw_dbg(hw, "Flash update complete\n");
518 		else
519 			hw_dbg(hw, "Flash update time out\n");
520 	}
521 
522 	return status;
523 }
524 
525 /**
526  * ixgbe_poll_flash_update_done_X540 - Poll flash update status
527  * @hw: pointer to hardware structure
528  *
529  * Polls the FLUDONE (bit 26) of the EEC Register to determine when the
530  * flash update is done.
531  **/
532 static s32 ixgbe_poll_flash_update_done_X540(struct ixgbe_hw *hw)
533 {
534 	u32 i;
535 	u32 reg;
536 
537 	for (i = 0; i < IXGBE_FLUDONE_ATTEMPTS; i++) {
538 		reg = IXGBE_READ_REG(hw, IXGBE_EEC(hw));
539 		if (reg & IXGBE_EEC_FLUDONE)
540 			return 0;
541 		udelay(5);
542 	}
543 	return IXGBE_ERR_EEPROM;
544 }
545 
546 /**
547  * ixgbe_acquire_swfw_sync_X540 - Acquire SWFW semaphore
548  * @hw: pointer to hardware structure
549  * @mask: Mask to specify which semaphore to acquire
550  *
551  * Acquires the SWFW semaphore thought the SW_FW_SYNC register for
552  * the specified function (CSR, PHY0, PHY1, NVM, Flash)
553  **/
554 s32 ixgbe_acquire_swfw_sync_X540(struct ixgbe_hw *hw, u32 mask)
555 {
556 	u32 swmask = mask & IXGBE_GSSR_NVM_PHY_MASK;
557 	u32 swi2c_mask = mask & IXGBE_GSSR_I2C_MASK;
558 	u32 fwmask = swmask << 5;
559 	u32 timeout = 200;
560 	u32 hwmask = 0;
561 	u32 swfw_sync;
562 	u32 i;
563 
564 	if (swmask & IXGBE_GSSR_EEP_SM)
565 		hwmask = IXGBE_GSSR_FLASH_SM;
566 
567 	/* SW only mask does not have FW bit pair */
568 	if (mask & IXGBE_GSSR_SW_MNG_SM)
569 		swmask |= IXGBE_GSSR_SW_MNG_SM;
570 
571 	swmask |= swi2c_mask;
572 	fwmask |= swi2c_mask << 2;
573 	for (i = 0; i < timeout; i++) {
574 		/* SW NVM semaphore bit is used for access to all
575 		 * SW_FW_SYNC bits (not just NVM)
576 		 */
577 		if (ixgbe_get_swfw_sync_semaphore(hw))
578 			return IXGBE_ERR_SWFW_SYNC;
579 
580 		swfw_sync = IXGBE_READ_REG(hw, IXGBE_SWFW_SYNC(hw));
581 		if (!(swfw_sync & (fwmask | swmask | hwmask))) {
582 			swfw_sync |= swmask;
583 			IXGBE_WRITE_REG(hw, IXGBE_SWFW_SYNC(hw), swfw_sync);
584 			ixgbe_release_swfw_sync_semaphore(hw);
585 			usleep_range(5000, 6000);
586 			return 0;
587 		}
588 		/* Firmware currently using resource (fwmask), hardware
589 		 * currently using resource (hwmask), or other software
590 		 * thread currently using resource (swmask)
591 		 */
592 		ixgbe_release_swfw_sync_semaphore(hw);
593 		usleep_range(5000, 10000);
594 	}
595 
596 	/* If the resource is not released by the FW/HW the SW can assume that
597 	 * the FW/HW malfunctions. In that case the SW should set the SW bit(s)
598 	 * of the requested resource(s) while ignoring the corresponding FW/HW
599 	 * bits in the SW_FW_SYNC register.
600 	 */
601 	if (ixgbe_get_swfw_sync_semaphore(hw))
602 		return IXGBE_ERR_SWFW_SYNC;
603 	swfw_sync = IXGBE_READ_REG(hw, IXGBE_SWFW_SYNC(hw));
604 	if (swfw_sync & (fwmask | hwmask)) {
605 		swfw_sync |= swmask;
606 		IXGBE_WRITE_REG(hw, IXGBE_SWFW_SYNC(hw), swfw_sync);
607 		ixgbe_release_swfw_sync_semaphore(hw);
608 		usleep_range(5000, 6000);
609 		return 0;
610 	}
611 	/* If the resource is not released by other SW the SW can assume that
612 	 * the other SW malfunctions. In that case the SW should clear all SW
613 	 * flags that it does not own and then repeat the whole process once
614 	 * again.
615 	 */
616 	if (swfw_sync & swmask) {
617 		u32 rmask = IXGBE_GSSR_EEP_SM | IXGBE_GSSR_PHY0_SM |
618 			    IXGBE_GSSR_PHY1_SM | IXGBE_GSSR_MAC_CSR_SM |
619 			    IXGBE_GSSR_SW_MNG_SM;
620 
621 		if (swi2c_mask)
622 			rmask |= IXGBE_GSSR_I2C_MASK;
623 		ixgbe_release_swfw_sync_X540(hw, rmask);
624 		ixgbe_release_swfw_sync_semaphore(hw);
625 		return IXGBE_ERR_SWFW_SYNC;
626 	}
627 	ixgbe_release_swfw_sync_semaphore(hw);
628 
629 	return IXGBE_ERR_SWFW_SYNC;
630 }
631 
632 /**
633  * ixgbe_release_swfw_sync_X540 - Release SWFW semaphore
634  * @hw: pointer to hardware structure
635  * @mask: Mask to specify which semaphore to release
636  *
637  * Releases the SWFW semaphore through the SW_FW_SYNC register
638  * for the specified function (CSR, PHY0, PHY1, EVM, Flash)
639  **/
640 void ixgbe_release_swfw_sync_X540(struct ixgbe_hw *hw, u32 mask)
641 {
642 	u32 swmask = mask & (IXGBE_GSSR_NVM_PHY_MASK | IXGBE_GSSR_SW_MNG_SM);
643 	u32 swfw_sync;
644 
645 	if (mask & IXGBE_GSSR_I2C_MASK)
646 		swmask |= mask & IXGBE_GSSR_I2C_MASK;
647 	ixgbe_get_swfw_sync_semaphore(hw);
648 
649 	swfw_sync = IXGBE_READ_REG(hw, IXGBE_SWFW_SYNC(hw));
650 	swfw_sync &= ~swmask;
651 	IXGBE_WRITE_REG(hw, IXGBE_SWFW_SYNC(hw), swfw_sync);
652 
653 	ixgbe_release_swfw_sync_semaphore(hw);
654 	usleep_range(5000, 6000);
655 }
656 
657 /**
658  * ixgbe_get_swfw_sync_semaphore - Get hardware semaphore
659  * @hw: pointer to hardware structure
660  *
661  * Sets the hardware semaphores so SW/FW can gain control of shared resources
662  */
663 static s32 ixgbe_get_swfw_sync_semaphore(struct ixgbe_hw *hw)
664 {
665 	u32 timeout = 2000;
666 	u32 i;
667 	u32 swsm;
668 
669 	/* Get SMBI software semaphore between device drivers first */
670 	for (i = 0; i < timeout; i++) {
671 		/* If the SMBI bit is 0 when we read it, then the bit will be
672 		 * set and we have the semaphore
673 		 */
674 		swsm = IXGBE_READ_REG(hw, IXGBE_SWSM(hw));
675 		if (!(swsm & IXGBE_SWSM_SMBI))
676 			break;
677 		usleep_range(50, 100);
678 	}
679 
680 	if (i == timeout) {
681 		hw_dbg(hw,
682 		       "Software semaphore SMBI between device drivers not granted.\n");
683 		return IXGBE_ERR_EEPROM;
684 	}
685 
686 	/* Now get the semaphore between SW/FW through the REGSMP bit */
687 	for (i = 0; i < timeout; i++) {
688 		swsm = IXGBE_READ_REG(hw, IXGBE_SWFW_SYNC(hw));
689 		if (!(swsm & IXGBE_SWFW_REGSMP))
690 			return 0;
691 
692 		usleep_range(50, 100);
693 	}
694 
695 	/* Release semaphores and return error if SW NVM semaphore
696 	 * was not granted because we do not have access to the EEPROM
697 	 */
698 	hw_dbg(hw, "REGSMP Software NVM semaphore not granted\n");
699 	ixgbe_release_swfw_sync_semaphore(hw);
700 	return IXGBE_ERR_EEPROM;
701 }
702 
703 /**
704  * ixgbe_release_swfw_sync_semaphore - Release hardware semaphore
705  * @hw: pointer to hardware structure
706  *
707  * This function clears hardware semaphore bits.
708  **/
709 static void ixgbe_release_swfw_sync_semaphore(struct ixgbe_hw *hw)
710 {
711 	 u32 swsm;
712 
713 	/* Release both semaphores by writing 0 to the bits REGSMP and SMBI */
714 
715 	swsm = IXGBE_READ_REG(hw, IXGBE_SWFW_SYNC(hw));
716 	swsm &= ~IXGBE_SWFW_REGSMP;
717 	IXGBE_WRITE_REG(hw, IXGBE_SWFW_SYNC(hw), swsm);
718 
719 	swsm = IXGBE_READ_REG(hw, IXGBE_SWSM(hw));
720 	swsm &= ~IXGBE_SWSM_SMBI;
721 	IXGBE_WRITE_REG(hw, IXGBE_SWSM(hw), swsm);
722 
723 	IXGBE_WRITE_FLUSH(hw);
724 }
725 
726 /**
727  *  ixgbe_init_swfw_sync_X540 - Release hardware semaphore
728  *  @hw: pointer to hardware structure
729  *
730  *  This function reset hardware semaphore bits for a semaphore that may
731  *  have be left locked due to a catastrophic failure.
732  **/
733 void ixgbe_init_swfw_sync_X540(struct ixgbe_hw *hw)
734 {
735 	u32 rmask;
736 
737 	/* First try to grab the semaphore but we don't need to bother
738 	 * looking to see whether we got the lock or not since we do
739 	 * the same thing regardless of whether we got the lock or not.
740 	 * We got the lock - we release it.
741 	 * We timeout trying to get the lock - we force its release.
742 	 */
743 	ixgbe_get_swfw_sync_semaphore(hw);
744 	ixgbe_release_swfw_sync_semaphore(hw);
745 
746 	/* Acquire and release all software resources. */
747 	rmask = IXGBE_GSSR_EEP_SM | IXGBE_GSSR_PHY0_SM |
748 		IXGBE_GSSR_PHY1_SM | IXGBE_GSSR_MAC_CSR_SM |
749 		IXGBE_GSSR_SW_MNG_SM | IXGBE_GSSR_I2C_MASK;
750 
751 	ixgbe_acquire_swfw_sync_X540(hw, rmask);
752 	ixgbe_release_swfw_sync_X540(hw, rmask);
753 }
754 
755 /**
756  * ixgbe_blink_led_start_X540 - Blink LED based on index.
757  * @hw: pointer to hardware structure
758  * @index: led number to blink
759  *
760  * Devices that implement the version 2 interface:
761  *   X540
762  **/
763 s32 ixgbe_blink_led_start_X540(struct ixgbe_hw *hw, u32 index)
764 {
765 	u32 macc_reg;
766 	u32 ledctl_reg;
767 	ixgbe_link_speed speed;
768 	bool link_up;
769 
770 	if (index > 3)
771 		return IXGBE_ERR_PARAM;
772 
773 	/* Link should be up in order for the blink bit in the LED control
774 	 * register to work. Force link and speed in the MAC if link is down.
775 	 * This will be reversed when we stop the blinking.
776 	 */
777 	hw->mac.ops.check_link(hw, &speed, &link_up, false);
778 	if (!link_up) {
779 		macc_reg = IXGBE_READ_REG(hw, IXGBE_MACC);
780 		macc_reg |= IXGBE_MACC_FLU | IXGBE_MACC_FSV_10G | IXGBE_MACC_FS;
781 		IXGBE_WRITE_REG(hw, IXGBE_MACC, macc_reg);
782 	}
783 	/* Set the LED to LINK_UP + BLINK. */
784 	ledctl_reg = IXGBE_READ_REG(hw, IXGBE_LEDCTL);
785 	ledctl_reg &= ~IXGBE_LED_MODE_MASK(index);
786 	ledctl_reg |= IXGBE_LED_BLINK(index);
787 	IXGBE_WRITE_REG(hw, IXGBE_LEDCTL, ledctl_reg);
788 	IXGBE_WRITE_FLUSH(hw);
789 
790 	return 0;
791 }
792 
793 /**
794  * ixgbe_blink_led_stop_X540 - Stop blinking LED based on index.
795  * @hw: pointer to hardware structure
796  * @index: led number to stop blinking
797  *
798  * Devices that implement the version 2 interface:
799  *   X540
800  **/
801 s32 ixgbe_blink_led_stop_X540(struct ixgbe_hw *hw, u32 index)
802 {
803 	u32 macc_reg;
804 	u32 ledctl_reg;
805 
806 	if (index > 3)
807 		return IXGBE_ERR_PARAM;
808 
809 	/* Restore the LED to its default value. */
810 	ledctl_reg = IXGBE_READ_REG(hw, IXGBE_LEDCTL);
811 	ledctl_reg &= ~IXGBE_LED_MODE_MASK(index);
812 	ledctl_reg |= IXGBE_LED_LINK_ACTIVE << IXGBE_LED_MODE_SHIFT(index);
813 	ledctl_reg &= ~IXGBE_LED_BLINK(index);
814 	IXGBE_WRITE_REG(hw, IXGBE_LEDCTL, ledctl_reg);
815 
816 	/* Unforce link and speed in the MAC. */
817 	macc_reg = IXGBE_READ_REG(hw, IXGBE_MACC);
818 	macc_reg &= ~(IXGBE_MACC_FLU | IXGBE_MACC_FSV_10G | IXGBE_MACC_FS);
819 	IXGBE_WRITE_REG(hw, IXGBE_MACC, macc_reg);
820 	IXGBE_WRITE_FLUSH(hw);
821 
822 	return 0;
823 }
824 static const struct ixgbe_mac_operations mac_ops_X540 = {
825 	.init_hw                = &ixgbe_init_hw_generic,
826 	.reset_hw               = &ixgbe_reset_hw_X540,
827 	.start_hw               = &ixgbe_start_hw_X540,
828 	.clear_hw_cntrs         = &ixgbe_clear_hw_cntrs_generic,
829 	.get_media_type         = &ixgbe_get_media_type_X540,
830 	.enable_rx_dma          = &ixgbe_enable_rx_dma_generic,
831 	.get_mac_addr           = &ixgbe_get_mac_addr_generic,
832 	.get_san_mac_addr       = &ixgbe_get_san_mac_addr_generic,
833 	.get_device_caps        = &ixgbe_get_device_caps_generic,
834 	.get_wwn_prefix         = &ixgbe_get_wwn_prefix_generic,
835 	.stop_adapter           = &ixgbe_stop_adapter_generic,
836 	.get_bus_info           = &ixgbe_get_bus_info_generic,
837 	.set_lan_id             = &ixgbe_set_lan_id_multi_port_pcie,
838 	.read_analog_reg8       = NULL,
839 	.write_analog_reg8      = NULL,
840 	.setup_link             = &ixgbe_setup_mac_link_X540,
841 	.set_rxpba		= &ixgbe_set_rxpba_generic,
842 	.check_link             = &ixgbe_check_mac_link_generic,
843 	.get_link_capabilities  = &ixgbe_get_copper_link_capabilities_generic,
844 	.led_on                 = &ixgbe_led_on_generic,
845 	.led_off                = &ixgbe_led_off_generic,
846 	.init_led_link_act	= ixgbe_init_led_link_act_generic,
847 	.blink_led_start        = &ixgbe_blink_led_start_X540,
848 	.blink_led_stop         = &ixgbe_blink_led_stop_X540,
849 	.set_rar                = &ixgbe_set_rar_generic,
850 	.clear_rar              = &ixgbe_clear_rar_generic,
851 	.set_vmdq               = &ixgbe_set_vmdq_generic,
852 	.set_vmdq_san_mac	= &ixgbe_set_vmdq_san_mac_generic,
853 	.clear_vmdq             = &ixgbe_clear_vmdq_generic,
854 	.init_rx_addrs          = &ixgbe_init_rx_addrs_generic,
855 	.update_mc_addr_list    = &ixgbe_update_mc_addr_list_generic,
856 	.enable_mc              = &ixgbe_enable_mc_generic,
857 	.disable_mc             = &ixgbe_disable_mc_generic,
858 	.clear_vfta             = &ixgbe_clear_vfta_generic,
859 	.set_vfta               = &ixgbe_set_vfta_generic,
860 	.fc_enable              = &ixgbe_fc_enable_generic,
861 	.setup_fc		= ixgbe_setup_fc_generic,
862 	.fc_autoneg		= ixgbe_fc_autoneg,
863 	.set_fw_drv_ver         = &ixgbe_set_fw_drv_ver_generic,
864 	.init_uta_tables        = &ixgbe_init_uta_tables_generic,
865 	.setup_sfp              = NULL,
866 	.set_mac_anti_spoofing  = &ixgbe_set_mac_anti_spoofing,
867 	.set_vlan_anti_spoofing = &ixgbe_set_vlan_anti_spoofing,
868 	.acquire_swfw_sync      = &ixgbe_acquire_swfw_sync_X540,
869 	.release_swfw_sync      = &ixgbe_release_swfw_sync_X540,
870 	.init_swfw_sync		= &ixgbe_init_swfw_sync_X540,
871 	.disable_rx_buff	= &ixgbe_disable_rx_buff_generic,
872 	.enable_rx_buff		= &ixgbe_enable_rx_buff_generic,
873 	.get_thermal_sensor_data = NULL,
874 	.init_thermal_sensor_thresh = NULL,
875 	.prot_autoc_read	= &prot_autoc_read_generic,
876 	.prot_autoc_write	= &prot_autoc_write_generic,
877 	.enable_rx		= &ixgbe_enable_rx_generic,
878 	.disable_rx		= &ixgbe_disable_rx_generic,
879 };
880 
881 static const struct ixgbe_eeprom_operations eeprom_ops_X540 = {
882 	.init_params            = &ixgbe_init_eeprom_params_X540,
883 	.read                   = &ixgbe_read_eerd_X540,
884 	.read_buffer		= &ixgbe_read_eerd_buffer_X540,
885 	.write                  = &ixgbe_write_eewr_X540,
886 	.write_buffer		= &ixgbe_write_eewr_buffer_X540,
887 	.calc_checksum		= &ixgbe_calc_eeprom_checksum_X540,
888 	.validate_checksum      = &ixgbe_validate_eeprom_checksum_X540,
889 	.update_checksum        = &ixgbe_update_eeprom_checksum_X540,
890 };
891 
892 static const struct ixgbe_phy_operations phy_ops_X540 = {
893 	.identify               = &ixgbe_identify_phy_generic,
894 	.identify_sfp           = &ixgbe_identify_sfp_module_generic,
895 	.init			= NULL,
896 	.reset                  = NULL,
897 	.read_reg               = &ixgbe_read_phy_reg_generic,
898 	.write_reg              = &ixgbe_write_phy_reg_generic,
899 	.setup_link             = &ixgbe_setup_phy_link_generic,
900 	.setup_link_speed       = &ixgbe_setup_phy_link_speed_generic,
901 	.read_i2c_byte          = &ixgbe_read_i2c_byte_generic,
902 	.write_i2c_byte         = &ixgbe_write_i2c_byte_generic,
903 	.read_i2c_sff8472	= &ixgbe_read_i2c_sff8472_generic,
904 	.read_i2c_eeprom        = &ixgbe_read_i2c_eeprom_generic,
905 	.write_i2c_eeprom       = &ixgbe_write_i2c_eeprom_generic,
906 	.check_overtemp         = &ixgbe_tn_check_overtemp,
907 	.set_phy_power          = &ixgbe_set_copper_phy_power,
908 };
909 
910 static const u32 ixgbe_mvals_X540[IXGBE_MVALS_IDX_LIMIT] = {
911 	IXGBE_MVALS_INIT(X540)
912 };
913 
914 const struct ixgbe_info ixgbe_X540_info = {
915 	.mac                    = ixgbe_mac_X540,
916 	.get_invariants         = &ixgbe_get_invariants_X540,
917 	.mac_ops                = &mac_ops_X540,
918 	.eeprom_ops             = &eeprom_ops_X540,
919 	.phy_ops                = &phy_ops_X540,
920 	.mbx_ops                = &mbx_ops_generic,
921 	.mvals			= ixgbe_mvals_X540,
922 };
923