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_mbx.h"
11 
12 #define IXGBE_82599_MAX_TX_QUEUES 128
13 #define IXGBE_82599_MAX_RX_QUEUES 128
14 #define IXGBE_82599_RAR_ENTRIES   128
15 #define IXGBE_82599_MC_TBL_SIZE   128
16 #define IXGBE_82599_VFT_TBL_SIZE  128
17 #define IXGBE_82599_RX_PB_SIZE	  512
18 
19 static void ixgbe_disable_tx_laser_multispeed_fiber(struct ixgbe_hw *hw);
20 static void ixgbe_enable_tx_laser_multispeed_fiber(struct ixgbe_hw *hw);
21 static void ixgbe_flap_tx_laser_multispeed_fiber(struct ixgbe_hw *hw);
22 static void
23 ixgbe_set_hard_rate_select_speed(struct ixgbe_hw *, ixgbe_link_speed);
24 static s32 ixgbe_setup_mac_link_smartspeed(struct ixgbe_hw *hw,
25 					   ixgbe_link_speed speed,
26 					   bool autoneg_wait_to_complete);
27 static void ixgbe_stop_mac_link_on_d3_82599(struct ixgbe_hw *hw);
28 static s32 ixgbe_start_mac_link_82599(struct ixgbe_hw *hw,
29 				      bool autoneg_wait_to_complete);
30 static s32 ixgbe_setup_mac_link_82599(struct ixgbe_hw *hw,
31 			       ixgbe_link_speed speed,
32 			       bool autoneg_wait_to_complete);
33 static s32 ixgbe_setup_copper_link_82599(struct ixgbe_hw *hw,
34 					 ixgbe_link_speed speed,
35 					 bool autoneg_wait_to_complete);
36 static s32 ixgbe_verify_fw_version_82599(struct ixgbe_hw *hw);
37 static s32 ixgbe_read_i2c_byte_82599(struct ixgbe_hw *hw, u8 byte_offset,
38 				     u8 dev_addr, u8 *data);
39 static s32 ixgbe_write_i2c_byte_82599(struct ixgbe_hw *hw, u8 byte_offset,
40 				      u8 dev_addr, u8 data);
41 static s32 ixgbe_reset_pipeline_82599(struct ixgbe_hw *hw);
42 static bool ixgbe_verify_lesm_fw_enabled_82599(struct ixgbe_hw *hw);
43 
44 bool ixgbe_mng_enabled(struct ixgbe_hw *hw)
45 {
46 	u32 fwsm, manc, factps;
47 
48 	fwsm = IXGBE_READ_REG(hw, IXGBE_FWSM(hw));
49 	if ((fwsm & IXGBE_FWSM_MODE_MASK) != IXGBE_FWSM_FW_MODE_PT)
50 		return false;
51 
52 	manc = IXGBE_READ_REG(hw, IXGBE_MANC);
53 	if (!(manc & IXGBE_MANC_RCV_TCO_EN))
54 		return false;
55 
56 	factps = IXGBE_READ_REG(hw, IXGBE_FACTPS(hw));
57 	if (factps & IXGBE_FACTPS_MNGCG)
58 		return false;
59 
60 	return true;
61 }
62 
63 static void ixgbe_init_mac_link_ops_82599(struct ixgbe_hw *hw)
64 {
65 	struct ixgbe_mac_info *mac = &hw->mac;
66 
67 	/* enable the laser control functions for SFP+ fiber
68 	 * and MNG not enabled
69 	 */
70 	if ((mac->ops.get_media_type(hw) == ixgbe_media_type_fiber) &&
71 	    !ixgbe_mng_enabled(hw)) {
72 		mac->ops.disable_tx_laser =
73 				       &ixgbe_disable_tx_laser_multispeed_fiber;
74 		mac->ops.enable_tx_laser =
75 					&ixgbe_enable_tx_laser_multispeed_fiber;
76 		mac->ops.flap_tx_laser = &ixgbe_flap_tx_laser_multispeed_fiber;
77 	} else {
78 		mac->ops.disable_tx_laser = NULL;
79 		mac->ops.enable_tx_laser = NULL;
80 		mac->ops.flap_tx_laser = NULL;
81 	}
82 
83 	if (hw->phy.multispeed_fiber) {
84 		/* Set up dual speed SFP+ support */
85 		mac->ops.setup_link = &ixgbe_setup_mac_link_multispeed_fiber;
86 		mac->ops.setup_mac_link = ixgbe_setup_mac_link_82599;
87 		mac->ops.set_rate_select_speed =
88 					       ixgbe_set_hard_rate_select_speed;
89 	} else {
90 		if ((mac->ops.get_media_type(hw) ==
91 		     ixgbe_media_type_backplane) &&
92 		    (hw->phy.smart_speed == ixgbe_smart_speed_auto ||
93 		     hw->phy.smart_speed == ixgbe_smart_speed_on) &&
94 		     !ixgbe_verify_lesm_fw_enabled_82599(hw))
95 			mac->ops.setup_link = &ixgbe_setup_mac_link_smartspeed;
96 		else
97 			mac->ops.setup_link = &ixgbe_setup_mac_link_82599;
98 	}
99 }
100 
101 static s32 ixgbe_setup_sfp_modules_82599(struct ixgbe_hw *hw)
102 {
103 	s32 ret_val;
104 	u16 list_offset, data_offset, data_value;
105 
106 	if (hw->phy.sfp_type != ixgbe_sfp_type_unknown) {
107 		ixgbe_init_mac_link_ops_82599(hw);
108 
109 		hw->phy.ops.reset = NULL;
110 
111 		ret_val = ixgbe_get_sfp_init_sequence_offsets(hw, &list_offset,
112 							      &data_offset);
113 		if (ret_val)
114 			return ret_val;
115 
116 		/* PHY config will finish before releasing the semaphore */
117 		ret_val = hw->mac.ops.acquire_swfw_sync(hw,
118 							IXGBE_GSSR_MAC_CSR_SM);
119 		if (ret_val)
120 			return -EBUSY;
121 
122 		if (hw->eeprom.ops.read(hw, ++data_offset, &data_value))
123 			goto setup_sfp_err;
124 		while (data_value != 0xffff) {
125 			IXGBE_WRITE_REG(hw, IXGBE_CORECTL, data_value);
126 			IXGBE_WRITE_FLUSH(hw);
127 			if (hw->eeprom.ops.read(hw, ++data_offset, &data_value))
128 				goto setup_sfp_err;
129 		}
130 
131 		/* Release the semaphore */
132 		hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_MAC_CSR_SM);
133 		/*
134 		 * Delay obtaining semaphore again to allow FW access,
135 		 * semaphore_delay is in ms usleep_range needs us.
136 		 */
137 		usleep_range(hw->eeprom.semaphore_delay * 1000,
138 			     hw->eeprom.semaphore_delay * 2000);
139 
140 		/* Restart DSP and set SFI mode */
141 		ret_val = hw->mac.ops.prot_autoc_write(hw,
142 			hw->mac.orig_autoc | IXGBE_AUTOC_LMS_10G_SERIAL,
143 			false);
144 
145 		if (ret_val) {
146 			hw_dbg(hw, " sfp module setup not complete\n");
147 			return -EIO;
148 		}
149 	}
150 
151 	return 0;
152 
153 setup_sfp_err:
154 	/* Release the semaphore */
155 	hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_MAC_CSR_SM);
156 	/* Delay obtaining semaphore again to allow FW access,
157 	 * semaphore_delay is in ms usleep_range needs us.
158 	 */
159 	usleep_range(hw->eeprom.semaphore_delay * 1000,
160 		     hw->eeprom.semaphore_delay * 2000);
161 	hw_err(hw, "eeprom read at offset %d failed\n", data_offset);
162 	return -EIO;
163 }
164 
165 /**
166  *  prot_autoc_read_82599 - Hides MAC differences needed for AUTOC read
167  *  @hw: pointer to hardware structure
168  *  @locked: Return the if we locked for this read.
169  *  @reg_val: Value we read from AUTOC
170  *
171  *  For this part (82599) we need to wrap read-modify-writes with a possible
172  *  FW/SW lock.  It is assumed this lock will be freed with the next
173  *  prot_autoc_write_82599().  Note, that locked can only be true in cases
174  *  where this function doesn't return an error.
175  **/
176 static s32 prot_autoc_read_82599(struct ixgbe_hw *hw, bool *locked,
177 				 u32 *reg_val)
178 {
179 	s32 ret_val;
180 
181 	*locked = false;
182 	/* If LESM is on then we need to hold the SW/FW semaphore. */
183 	if (ixgbe_verify_lesm_fw_enabled_82599(hw)) {
184 		ret_val = hw->mac.ops.acquire_swfw_sync(hw,
185 					IXGBE_GSSR_MAC_CSR_SM);
186 		if (ret_val)
187 			return -EBUSY;
188 
189 		*locked = true;
190 	}
191 
192 	*reg_val = IXGBE_READ_REG(hw, IXGBE_AUTOC);
193 	return 0;
194 }
195 
196 /**
197  * prot_autoc_write_82599 - Hides MAC differences needed for AUTOC write
198  * @hw: pointer to hardware structure
199  * @autoc: value to write to AUTOC
200  * @locked: bool to indicate whether the SW/FW lock was already taken by
201  *	     previous proc_autoc_read_82599.
202  *
203  * This part (82599) may need to hold a the SW/FW lock around all writes to
204  * AUTOC. Likewise after a write we need to do a pipeline reset.
205  **/
206 static s32 prot_autoc_write_82599(struct ixgbe_hw *hw, u32 autoc, bool locked)
207 {
208 	s32 ret_val = 0;
209 
210 	/* Blocked by MNG FW so bail */
211 	if (ixgbe_check_reset_blocked(hw))
212 		goto out;
213 
214 	/* We only need to get the lock if:
215 	 *  - We didn't do it already (in the read part of a read-modify-write)
216 	 *  - LESM is enabled.
217 	 */
218 	if (!locked && ixgbe_verify_lesm_fw_enabled_82599(hw)) {
219 		ret_val = hw->mac.ops.acquire_swfw_sync(hw,
220 					IXGBE_GSSR_MAC_CSR_SM);
221 		if (ret_val)
222 			return -EBUSY;
223 
224 		locked = true;
225 	}
226 
227 	IXGBE_WRITE_REG(hw, IXGBE_AUTOC, autoc);
228 	ret_val = ixgbe_reset_pipeline_82599(hw);
229 
230 out:
231 	/* Free the SW/FW semaphore as we either grabbed it here or
232 	 * already had it when this function was called.
233 	 */
234 	if (locked)
235 		hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_MAC_CSR_SM);
236 
237 	return ret_val;
238 }
239 
240 static s32 ixgbe_get_invariants_82599(struct ixgbe_hw *hw)
241 {
242 	struct ixgbe_mac_info *mac = &hw->mac;
243 
244 	ixgbe_init_mac_link_ops_82599(hw);
245 
246 	mac->mcft_size = IXGBE_82599_MC_TBL_SIZE;
247 	mac->vft_size = IXGBE_82599_VFT_TBL_SIZE;
248 	mac->num_rar_entries = IXGBE_82599_RAR_ENTRIES;
249 	mac->rx_pb_size = IXGBE_82599_RX_PB_SIZE;
250 	mac->max_rx_queues = IXGBE_82599_MAX_RX_QUEUES;
251 	mac->max_tx_queues = IXGBE_82599_MAX_TX_QUEUES;
252 	mac->max_msix_vectors = ixgbe_get_pcie_msix_count_generic(hw);
253 
254 	return 0;
255 }
256 
257 /**
258  *  ixgbe_init_phy_ops_82599 - PHY/SFP specific init
259  *  @hw: pointer to hardware structure
260  *
261  *  Initialize any function pointers that were not able to be
262  *  set during get_invariants because the PHY/SFP type was
263  *  not known.  Perform the SFP init if necessary.
264  *
265  **/
266 static s32 ixgbe_init_phy_ops_82599(struct ixgbe_hw *hw)
267 {
268 	struct ixgbe_mac_info *mac = &hw->mac;
269 	struct ixgbe_phy_info *phy = &hw->phy;
270 	s32 ret_val;
271 	u32 esdp;
272 
273 	if (hw->device_id == IXGBE_DEV_ID_82599_QSFP_SF_QP) {
274 		/* Store flag indicating I2C bus access control unit. */
275 		hw->phy.qsfp_shared_i2c_bus = true;
276 
277 		/* Initialize access to QSFP+ I2C bus */
278 		esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
279 		esdp |= IXGBE_ESDP_SDP0_DIR;
280 		esdp &= ~IXGBE_ESDP_SDP1_DIR;
281 		esdp &= ~IXGBE_ESDP_SDP0;
282 		esdp &= ~IXGBE_ESDP_SDP0_NATIVE;
283 		esdp &= ~IXGBE_ESDP_SDP1_NATIVE;
284 		IXGBE_WRITE_REG(hw, IXGBE_ESDP, esdp);
285 		IXGBE_WRITE_FLUSH(hw);
286 
287 		phy->ops.read_i2c_byte = &ixgbe_read_i2c_byte_82599;
288 		phy->ops.write_i2c_byte = &ixgbe_write_i2c_byte_82599;
289 	}
290 
291 	/* Identify the PHY or SFP module */
292 	ret_val = phy->ops.identify(hw);
293 
294 	/* Setup function pointers based on detected SFP module and speeds */
295 	ixgbe_init_mac_link_ops_82599(hw);
296 
297 	/* If copper media, overwrite with copper function pointers */
298 	if (mac->ops.get_media_type(hw) == ixgbe_media_type_copper) {
299 		mac->ops.setup_link = &ixgbe_setup_copper_link_82599;
300 		mac->ops.get_link_capabilities =
301 			&ixgbe_get_copper_link_capabilities_generic;
302 	}
303 
304 	/* Set necessary function pointers based on phy type */
305 	switch (hw->phy.type) {
306 	case ixgbe_phy_tn:
307 		phy->ops.check_link = &ixgbe_check_phy_link_tnx;
308 		phy->ops.setup_link = &ixgbe_setup_phy_link_tnx;
309 		break;
310 	default:
311 		break;
312 	}
313 
314 	return ret_val;
315 }
316 
317 /**
318  *  ixgbe_get_link_capabilities_82599 - Determines link capabilities
319  *  @hw: pointer to hardware structure
320  *  @speed: pointer to link speed
321  *  @autoneg: true when autoneg or autotry is enabled
322  *
323  *  Determines the link capabilities by reading the AUTOC register.
324  **/
325 static s32 ixgbe_get_link_capabilities_82599(struct ixgbe_hw *hw,
326 					     ixgbe_link_speed *speed,
327 					     bool *autoneg)
328 {
329 	u32 autoc = 0;
330 
331 	/* Determine 1G link capabilities off of SFP+ type */
332 	if (hw->phy.sfp_type == ixgbe_sfp_type_1g_cu_core0 ||
333 	    hw->phy.sfp_type == ixgbe_sfp_type_1g_cu_core1 ||
334 	    hw->phy.sfp_type == ixgbe_sfp_type_1g_lx_core0 ||
335 	    hw->phy.sfp_type == ixgbe_sfp_type_1g_lx_core1 ||
336 	    hw->phy.sfp_type == ixgbe_sfp_type_1g_sx_core0 ||
337 	    hw->phy.sfp_type == ixgbe_sfp_type_1g_sx_core1) {
338 		*speed = IXGBE_LINK_SPEED_1GB_FULL;
339 		*autoneg = true;
340 		return 0;
341 	}
342 
343 	/*
344 	 * Determine link capabilities based on the stored value of AUTOC,
345 	 * which represents EEPROM defaults.  If AUTOC value has not been
346 	 * stored, use the current register value.
347 	 */
348 	if (hw->mac.orig_link_settings_stored)
349 		autoc = hw->mac.orig_autoc;
350 	else
351 		autoc = IXGBE_READ_REG(hw, IXGBE_AUTOC);
352 
353 	switch (autoc & IXGBE_AUTOC_LMS_MASK) {
354 	case IXGBE_AUTOC_LMS_1G_LINK_NO_AN:
355 		*speed = IXGBE_LINK_SPEED_1GB_FULL;
356 		*autoneg = false;
357 		break;
358 
359 	case IXGBE_AUTOC_LMS_10G_LINK_NO_AN:
360 		*speed = IXGBE_LINK_SPEED_10GB_FULL;
361 		*autoneg = false;
362 		break;
363 
364 	case IXGBE_AUTOC_LMS_1G_AN:
365 		*speed = IXGBE_LINK_SPEED_1GB_FULL;
366 		*autoneg = true;
367 		break;
368 
369 	case IXGBE_AUTOC_LMS_10G_SERIAL:
370 		*speed = IXGBE_LINK_SPEED_10GB_FULL;
371 		*autoneg = false;
372 		break;
373 
374 	case IXGBE_AUTOC_LMS_KX4_KX_KR:
375 	case IXGBE_AUTOC_LMS_KX4_KX_KR_1G_AN:
376 		*speed = IXGBE_LINK_SPEED_UNKNOWN;
377 		if (autoc & IXGBE_AUTOC_KR_SUPP)
378 			*speed |= IXGBE_LINK_SPEED_10GB_FULL;
379 		if (autoc & IXGBE_AUTOC_KX4_SUPP)
380 			*speed |= IXGBE_LINK_SPEED_10GB_FULL;
381 		if (autoc & IXGBE_AUTOC_KX_SUPP)
382 			*speed |= IXGBE_LINK_SPEED_1GB_FULL;
383 		*autoneg = true;
384 		break;
385 
386 	case IXGBE_AUTOC_LMS_KX4_KX_KR_SGMII:
387 		*speed = IXGBE_LINK_SPEED_100_FULL;
388 		if (autoc & IXGBE_AUTOC_KR_SUPP)
389 			*speed |= IXGBE_LINK_SPEED_10GB_FULL;
390 		if (autoc & IXGBE_AUTOC_KX4_SUPP)
391 			*speed |= IXGBE_LINK_SPEED_10GB_FULL;
392 		if (autoc & IXGBE_AUTOC_KX_SUPP)
393 			*speed |= IXGBE_LINK_SPEED_1GB_FULL;
394 		*autoneg = true;
395 		break;
396 
397 	case IXGBE_AUTOC_LMS_SGMII_1G_100M:
398 		*speed = IXGBE_LINK_SPEED_1GB_FULL | IXGBE_LINK_SPEED_100_FULL;
399 		*autoneg = false;
400 		break;
401 
402 	default:
403 		return -EIO;
404 	}
405 
406 	if (hw->phy.multispeed_fiber) {
407 		*speed |= IXGBE_LINK_SPEED_10GB_FULL |
408 			  IXGBE_LINK_SPEED_1GB_FULL;
409 
410 		/* QSFP must not enable auto-negotiation */
411 		if (hw->phy.media_type == ixgbe_media_type_fiber_qsfp)
412 			*autoneg = false;
413 		else
414 			*autoneg = true;
415 	}
416 
417 	return 0;
418 }
419 
420 /**
421  *  ixgbe_get_media_type_82599 - Get media type
422  *  @hw: pointer to hardware structure
423  *
424  *  Returns the media type (fiber, copper, backplane)
425  **/
426 static enum ixgbe_media_type ixgbe_get_media_type_82599(struct ixgbe_hw *hw)
427 {
428 	/* Detect if there is a copper PHY attached. */
429 	switch (hw->phy.type) {
430 	case ixgbe_phy_cu_unknown:
431 	case ixgbe_phy_tn:
432 		return ixgbe_media_type_copper;
433 
434 	default:
435 		break;
436 	}
437 
438 	switch (hw->device_id) {
439 	case IXGBE_DEV_ID_82599_KX4:
440 	case IXGBE_DEV_ID_82599_KX4_MEZZ:
441 	case IXGBE_DEV_ID_82599_COMBO_BACKPLANE:
442 	case IXGBE_DEV_ID_82599_KR:
443 	case IXGBE_DEV_ID_82599_BACKPLANE_FCOE:
444 	case IXGBE_DEV_ID_82599_XAUI_LOM:
445 		/* Default device ID is mezzanine card KX/KX4 */
446 		return ixgbe_media_type_backplane;
447 
448 	case IXGBE_DEV_ID_82599_SFP:
449 	case IXGBE_DEV_ID_82599_SFP_FCOE:
450 	case IXGBE_DEV_ID_82599_SFP_EM:
451 	case IXGBE_DEV_ID_82599_SFP_SF2:
452 	case IXGBE_DEV_ID_82599_SFP_SF_QP:
453 	case IXGBE_DEV_ID_82599EN_SFP:
454 		return ixgbe_media_type_fiber;
455 
456 	case IXGBE_DEV_ID_82599_CX4:
457 		return ixgbe_media_type_cx4;
458 
459 	case IXGBE_DEV_ID_82599_T3_LOM:
460 		return ixgbe_media_type_copper;
461 
462 	case IXGBE_DEV_ID_82599_LS:
463 		return ixgbe_media_type_fiber_lco;
464 
465 	case IXGBE_DEV_ID_82599_QSFP_SF_QP:
466 		return ixgbe_media_type_fiber_qsfp;
467 
468 	default:
469 		return ixgbe_media_type_unknown;
470 	}
471 }
472 
473 /**
474  * ixgbe_stop_mac_link_on_d3_82599 - Disables link on D3
475  * @hw: pointer to hardware structure
476  *
477  * Disables link, should be called during D3 power down sequence.
478  *
479  **/
480 static void ixgbe_stop_mac_link_on_d3_82599(struct ixgbe_hw *hw)
481 {
482 	u32 autoc2_reg;
483 	u16 ee_ctrl_2 = 0;
484 
485 	hw->eeprom.ops.read(hw, IXGBE_EEPROM_CTRL_2, &ee_ctrl_2);
486 
487 	if (!ixgbe_mng_present(hw) && !hw->wol_enabled &&
488 	    ee_ctrl_2 & IXGBE_EEPROM_CCD_BIT) {
489 		autoc2_reg = IXGBE_READ_REG(hw, IXGBE_AUTOC2);
490 		autoc2_reg |= IXGBE_AUTOC2_LINK_DISABLE_ON_D3_MASK;
491 		IXGBE_WRITE_REG(hw, IXGBE_AUTOC2, autoc2_reg);
492 	}
493 }
494 
495 /**
496  *  ixgbe_start_mac_link_82599 - Setup MAC link settings
497  *  @hw: pointer to hardware structure
498  *  @autoneg_wait_to_complete: true when waiting for completion is needed
499  *
500  *  Configures link settings based on values in the ixgbe_hw struct.
501  *  Restarts the link.  Performs autonegotiation if needed.
502  **/
503 static s32 ixgbe_start_mac_link_82599(struct ixgbe_hw *hw,
504 			       bool autoneg_wait_to_complete)
505 {
506 	u32 autoc_reg;
507 	u32 links_reg;
508 	u32 i;
509 	s32 status = 0;
510 	bool got_lock = false;
511 
512 	if (ixgbe_verify_lesm_fw_enabled_82599(hw)) {
513 		status = hw->mac.ops.acquire_swfw_sync(hw,
514 						IXGBE_GSSR_MAC_CSR_SM);
515 		if (status)
516 			return status;
517 
518 		got_lock = true;
519 	}
520 
521 	/* Restart link */
522 	ixgbe_reset_pipeline_82599(hw);
523 
524 	if (got_lock)
525 		hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_MAC_CSR_SM);
526 
527 	/* Only poll for autoneg to complete if specified to do so */
528 	if (autoneg_wait_to_complete) {
529 		autoc_reg = IXGBE_READ_REG(hw, IXGBE_AUTOC);
530 		if ((autoc_reg & IXGBE_AUTOC_LMS_MASK) ==
531 		     IXGBE_AUTOC_LMS_KX4_KX_KR ||
532 		    (autoc_reg & IXGBE_AUTOC_LMS_MASK) ==
533 		     IXGBE_AUTOC_LMS_KX4_KX_KR_1G_AN ||
534 		    (autoc_reg & IXGBE_AUTOC_LMS_MASK) ==
535 		     IXGBE_AUTOC_LMS_KX4_KX_KR_SGMII) {
536 			links_reg = 0; /* Just in case Autoneg time = 0 */
537 			for (i = 0; i < IXGBE_AUTO_NEG_TIME; i++) {
538 				links_reg = IXGBE_READ_REG(hw, IXGBE_LINKS);
539 				if (links_reg & IXGBE_LINKS_KX_AN_COMP)
540 					break;
541 				msleep(100);
542 			}
543 			if (!(links_reg & IXGBE_LINKS_KX_AN_COMP)) {
544 				status = -EIO;
545 				hw_dbg(hw, "Autoneg did not complete.\n");
546 			}
547 		}
548 	}
549 
550 	/* Add delay to filter out noises during initial link setup */
551 	msleep(50);
552 
553 	return status;
554 }
555 
556 /**
557  *  ixgbe_disable_tx_laser_multispeed_fiber - Disable Tx laser
558  *  @hw: pointer to hardware structure
559  *
560  *  The base drivers may require better control over SFP+ module
561  *  PHY states.  This includes selectively shutting down the Tx
562  *  laser on the PHY, effectively halting physical link.
563  **/
564 static void ixgbe_disable_tx_laser_multispeed_fiber(struct ixgbe_hw *hw)
565 {
566 	u32 esdp_reg = IXGBE_READ_REG(hw, IXGBE_ESDP);
567 
568 	/* Blocked by MNG FW so bail */
569 	if (ixgbe_check_reset_blocked(hw))
570 		return;
571 
572 	/* Disable tx laser; allow 100us to go dark per spec */
573 	esdp_reg |= IXGBE_ESDP_SDP3;
574 	IXGBE_WRITE_REG(hw, IXGBE_ESDP, esdp_reg);
575 	IXGBE_WRITE_FLUSH(hw);
576 	udelay(100);
577 }
578 
579 /**
580  *  ixgbe_enable_tx_laser_multispeed_fiber - Enable Tx laser
581  *  @hw: pointer to hardware structure
582  *
583  *  The base drivers may require better control over SFP+ module
584  *  PHY states.  This includes selectively turning on the Tx
585  *  laser on the PHY, effectively starting physical link.
586  **/
587 static void ixgbe_enable_tx_laser_multispeed_fiber(struct ixgbe_hw *hw)
588 {
589 	u32 esdp_reg = IXGBE_READ_REG(hw, IXGBE_ESDP);
590 
591 	/* Enable tx laser; allow 100ms to light up */
592 	esdp_reg &= ~IXGBE_ESDP_SDP3;
593 	IXGBE_WRITE_REG(hw, IXGBE_ESDP, esdp_reg);
594 	IXGBE_WRITE_FLUSH(hw);
595 	msleep(100);
596 }
597 
598 /**
599  *  ixgbe_flap_tx_laser_multispeed_fiber - Flap Tx laser
600  *  @hw: pointer to hardware structure
601  *
602  *  When the driver changes the link speeds that it can support,
603  *  it sets autotry_restart to true to indicate that we need to
604  *  initiate a new autotry session with the link partner.  To do
605  *  so, we set the speed then disable and re-enable the tx laser, to
606  *  alert the link partner that it also needs to restart autotry on its
607  *  end.  This is consistent with true clause 37 autoneg, which also
608  *  involves a loss of signal.
609  **/
610 static void ixgbe_flap_tx_laser_multispeed_fiber(struct ixgbe_hw *hw)
611 {
612 	/* Blocked by MNG FW so bail */
613 	if (ixgbe_check_reset_blocked(hw))
614 		return;
615 
616 	if (hw->mac.autotry_restart) {
617 		ixgbe_disable_tx_laser_multispeed_fiber(hw);
618 		ixgbe_enable_tx_laser_multispeed_fiber(hw);
619 		hw->mac.autotry_restart = false;
620 	}
621 }
622 
623 /**
624  * ixgbe_set_hard_rate_select_speed - Set module link speed
625  * @hw: pointer to hardware structure
626  * @speed: link speed to set
627  *
628  * Set module link speed via RS0/RS1 rate select pins.
629  */
630 static void
631 ixgbe_set_hard_rate_select_speed(struct ixgbe_hw *hw, ixgbe_link_speed speed)
632 {
633 	u32 esdp_reg = IXGBE_READ_REG(hw, IXGBE_ESDP);
634 
635 	switch (speed) {
636 	case IXGBE_LINK_SPEED_10GB_FULL:
637 		esdp_reg |= (IXGBE_ESDP_SDP5_DIR | IXGBE_ESDP_SDP5);
638 		break;
639 	case IXGBE_LINK_SPEED_1GB_FULL:
640 		esdp_reg &= ~IXGBE_ESDP_SDP5;
641 		esdp_reg |= IXGBE_ESDP_SDP5_DIR;
642 		break;
643 	default:
644 		hw_dbg(hw, "Invalid fixed module speed\n");
645 		return;
646 	}
647 
648 	IXGBE_WRITE_REG(hw, IXGBE_ESDP, esdp_reg);
649 	IXGBE_WRITE_FLUSH(hw);
650 }
651 
652 /**
653  *  ixgbe_setup_mac_link_smartspeed - Set MAC link speed using SmartSpeed
654  *  @hw: pointer to hardware structure
655  *  @speed: new link speed
656  *  @autoneg_wait_to_complete: true when waiting for completion is needed
657  *
658  *  Implements the Intel SmartSpeed algorithm.
659  **/
660 static s32 ixgbe_setup_mac_link_smartspeed(struct ixgbe_hw *hw,
661 				     ixgbe_link_speed speed,
662 				     bool autoneg_wait_to_complete)
663 {
664 	s32 status = 0;
665 	ixgbe_link_speed link_speed = IXGBE_LINK_SPEED_UNKNOWN;
666 	s32 i, j;
667 	bool link_up = false;
668 	u32 autoc_reg = IXGBE_READ_REG(hw, IXGBE_AUTOC);
669 
670 	 /* Set autoneg_advertised value based on input link speed */
671 	hw->phy.autoneg_advertised = 0;
672 
673 	if (speed & IXGBE_LINK_SPEED_10GB_FULL)
674 		hw->phy.autoneg_advertised |= IXGBE_LINK_SPEED_10GB_FULL;
675 
676 	if (speed & IXGBE_LINK_SPEED_1GB_FULL)
677 		hw->phy.autoneg_advertised |= IXGBE_LINK_SPEED_1GB_FULL;
678 
679 	if (speed & IXGBE_LINK_SPEED_100_FULL)
680 		hw->phy.autoneg_advertised |= IXGBE_LINK_SPEED_100_FULL;
681 
682 	/*
683 	 * Implement Intel SmartSpeed algorithm.  SmartSpeed will reduce the
684 	 * autoneg advertisement if link is unable to be established at the
685 	 * highest negotiated rate.  This can sometimes happen due to integrity
686 	 * issues with the physical media connection.
687 	 */
688 
689 	/* First, try to get link with full advertisement */
690 	hw->phy.smart_speed_active = false;
691 	for (j = 0; j < IXGBE_SMARTSPEED_MAX_RETRIES; j++) {
692 		status = ixgbe_setup_mac_link_82599(hw, speed,
693 						    autoneg_wait_to_complete);
694 		if (status != 0)
695 			goto out;
696 
697 		/*
698 		 * Wait for the controller to acquire link.  Per IEEE 802.3ap,
699 		 * Section 73.10.2, we may have to wait up to 500ms if KR is
700 		 * attempted, or 200ms if KX/KX4/BX/BX4 is attempted, per
701 		 * Table 9 in the AN MAS.
702 		 */
703 		for (i = 0; i < 5; i++) {
704 			mdelay(100);
705 
706 			/* If we have link, just jump out */
707 			status = hw->mac.ops.check_link(hw, &link_speed,
708 							&link_up, false);
709 			if (status != 0)
710 				goto out;
711 
712 			if (link_up)
713 				goto out;
714 		}
715 	}
716 
717 	/*
718 	 * We didn't get link.  If we advertised KR plus one of KX4/KX
719 	 * (or BX4/BX), then disable KR and try again.
720 	 */
721 	if (((autoc_reg & IXGBE_AUTOC_KR_SUPP) == 0) ||
722 	    ((autoc_reg & IXGBE_AUTOC_KX4_KX_SUPP_MASK) == 0))
723 		goto out;
724 
725 	/* Turn SmartSpeed on to disable KR support */
726 	hw->phy.smart_speed_active = true;
727 	status = ixgbe_setup_mac_link_82599(hw, speed,
728 					    autoneg_wait_to_complete);
729 	if (status != 0)
730 		goto out;
731 
732 	/*
733 	 * Wait for the controller to acquire link.  600ms will allow for
734 	 * the AN link_fail_inhibit_timer as well for multiple cycles of
735 	 * parallel detect, both 10g and 1g. This allows for the maximum
736 	 * connect attempts as defined in the AN MAS table 73-7.
737 	 */
738 	for (i = 0; i < 6; i++) {
739 		mdelay(100);
740 
741 		/* If we have link, just jump out */
742 		status = hw->mac.ops.check_link(hw, &link_speed,
743 						&link_up, false);
744 		if (status != 0)
745 			goto out;
746 
747 		if (link_up)
748 			goto out;
749 	}
750 
751 	/* We didn't get link.  Turn SmartSpeed back off. */
752 	hw->phy.smart_speed_active = false;
753 	status = ixgbe_setup_mac_link_82599(hw, speed,
754 					    autoneg_wait_to_complete);
755 
756 out:
757 	if (link_up && (link_speed == IXGBE_LINK_SPEED_1GB_FULL))
758 		hw_dbg(hw, "Smartspeed has downgraded the link speed from the maximum advertised\n");
759 	return status;
760 }
761 
762 /**
763  *  ixgbe_setup_mac_link_82599 - Set MAC link speed
764  *  @hw: pointer to hardware structure
765  *  @speed: new link speed
766  *  @autoneg_wait_to_complete: true when waiting for completion is needed
767  *
768  *  Set the link speed in the AUTOC register and restarts link.
769  **/
770 static s32 ixgbe_setup_mac_link_82599(struct ixgbe_hw *hw,
771 				      ixgbe_link_speed speed,
772 				      bool autoneg_wait_to_complete)
773 {
774 	bool autoneg = false;
775 	s32 status;
776 	u32 pma_pmd_1g, link_mode, links_reg, i;
777 	u32 autoc2 = IXGBE_READ_REG(hw, IXGBE_AUTOC2);
778 	u32 pma_pmd_10g_serial = autoc2 & IXGBE_AUTOC2_10G_SERIAL_PMA_PMD_MASK;
779 	ixgbe_link_speed link_capabilities = IXGBE_LINK_SPEED_UNKNOWN;
780 
781 	/* holds the value of AUTOC register at this current point in time */
782 	u32 current_autoc = IXGBE_READ_REG(hw, IXGBE_AUTOC);
783 	/* holds the cached value of AUTOC register */
784 	u32 orig_autoc = 0;
785 	/* temporary variable used for comparison purposes */
786 	u32 autoc = current_autoc;
787 
788 	/* Check to see if speed passed in is supported. */
789 	status = hw->mac.ops.get_link_capabilities(hw, &link_capabilities,
790 						   &autoneg);
791 	if (status)
792 		return status;
793 
794 	speed &= link_capabilities;
795 
796 	if (speed == IXGBE_LINK_SPEED_UNKNOWN)
797 		return -EINVAL;
798 
799 	/* Use stored value (EEPROM defaults) of AUTOC to find KR/KX4 support*/
800 	if (hw->mac.orig_link_settings_stored)
801 		orig_autoc = hw->mac.orig_autoc;
802 	else
803 		orig_autoc = autoc;
804 
805 	link_mode = autoc & IXGBE_AUTOC_LMS_MASK;
806 	pma_pmd_1g = autoc & IXGBE_AUTOC_1G_PMA_PMD_MASK;
807 
808 	if (link_mode == IXGBE_AUTOC_LMS_KX4_KX_KR ||
809 	    link_mode == IXGBE_AUTOC_LMS_KX4_KX_KR_1G_AN ||
810 	    link_mode == IXGBE_AUTOC_LMS_KX4_KX_KR_SGMII) {
811 		/* Set KX4/KX/KR support according to speed requested */
812 		autoc &= ~(IXGBE_AUTOC_KX4_KX_SUPP_MASK | IXGBE_AUTOC_KR_SUPP);
813 		if (speed & IXGBE_LINK_SPEED_10GB_FULL) {
814 			if (orig_autoc & IXGBE_AUTOC_KX4_SUPP)
815 				autoc |= IXGBE_AUTOC_KX4_SUPP;
816 			if ((orig_autoc & IXGBE_AUTOC_KR_SUPP) &&
817 			    (hw->phy.smart_speed_active == false))
818 				autoc |= IXGBE_AUTOC_KR_SUPP;
819 		}
820 		if (speed & IXGBE_LINK_SPEED_1GB_FULL)
821 			autoc |= IXGBE_AUTOC_KX_SUPP;
822 	} else if ((pma_pmd_1g == IXGBE_AUTOC_1G_SFI) &&
823 		   (link_mode == IXGBE_AUTOC_LMS_1G_LINK_NO_AN ||
824 		    link_mode == IXGBE_AUTOC_LMS_1G_AN)) {
825 		/* Switch from 1G SFI to 10G SFI if requested */
826 		if ((speed == IXGBE_LINK_SPEED_10GB_FULL) &&
827 		    (pma_pmd_10g_serial == IXGBE_AUTOC2_10G_SFI)) {
828 			autoc &= ~IXGBE_AUTOC_LMS_MASK;
829 			autoc |= IXGBE_AUTOC_LMS_10G_SERIAL;
830 		}
831 	} else if ((pma_pmd_10g_serial == IXGBE_AUTOC2_10G_SFI) &&
832 		   (link_mode == IXGBE_AUTOC_LMS_10G_SERIAL)) {
833 		/* Switch from 10G SFI to 1G SFI if requested */
834 		if ((speed == IXGBE_LINK_SPEED_1GB_FULL) &&
835 		    (pma_pmd_1g == IXGBE_AUTOC_1G_SFI)) {
836 			autoc &= ~IXGBE_AUTOC_LMS_MASK;
837 			if (autoneg)
838 				autoc |= IXGBE_AUTOC_LMS_1G_AN;
839 			else
840 				autoc |= IXGBE_AUTOC_LMS_1G_LINK_NO_AN;
841 		}
842 	}
843 
844 	if (autoc != current_autoc) {
845 		/* Restart link */
846 		status = hw->mac.ops.prot_autoc_write(hw, autoc, false);
847 		if (status)
848 			return status;
849 
850 		/* Only poll for autoneg to complete if specified to do so */
851 		if (autoneg_wait_to_complete) {
852 			if (link_mode == IXGBE_AUTOC_LMS_KX4_KX_KR ||
853 			    link_mode == IXGBE_AUTOC_LMS_KX4_KX_KR_1G_AN ||
854 			    link_mode == IXGBE_AUTOC_LMS_KX4_KX_KR_SGMII) {
855 				links_reg = 0; /*Just in case Autoneg time=0*/
856 				for (i = 0; i < IXGBE_AUTO_NEG_TIME; i++) {
857 					links_reg =
858 					       IXGBE_READ_REG(hw, IXGBE_LINKS);
859 					if (links_reg & IXGBE_LINKS_KX_AN_COMP)
860 						break;
861 					msleep(100);
862 				}
863 				if (!(links_reg & IXGBE_LINKS_KX_AN_COMP)) {
864 					status = -EIO;
865 					hw_dbg(hw, "Autoneg did not complete.\n");
866 				}
867 			}
868 		}
869 
870 		/* Add delay to filter out noises during initial link setup */
871 		msleep(50);
872 	}
873 
874 	return status;
875 }
876 
877 /**
878  *  ixgbe_setup_copper_link_82599 - Set the PHY autoneg advertised field
879  *  @hw: pointer to hardware structure
880  *  @speed: new link speed
881  *  @autoneg_wait_to_complete: true if waiting is needed to complete
882  *
883  *  Restarts link on PHY and MAC based on settings passed in.
884  **/
885 static s32 ixgbe_setup_copper_link_82599(struct ixgbe_hw *hw,
886 					 ixgbe_link_speed speed,
887 					 bool autoneg_wait_to_complete)
888 {
889 	s32 status;
890 
891 	/* Setup the PHY according to input speed */
892 	status = hw->phy.ops.setup_link_speed(hw, speed,
893 					      autoneg_wait_to_complete);
894 	/* Set up MAC */
895 	ixgbe_start_mac_link_82599(hw, autoneg_wait_to_complete);
896 
897 	return status;
898 }
899 
900 /**
901  *  ixgbe_reset_hw_82599 - Perform hardware reset
902  *  @hw: pointer to hardware structure
903  *
904  *  Resets the hardware by resetting the transmit and receive units, masks
905  *  and clears all interrupts, perform a PHY reset, and perform a link (MAC)
906  *  reset.
907  **/
908 static s32 ixgbe_reset_hw_82599(struct ixgbe_hw *hw)
909 {
910 	ixgbe_link_speed link_speed;
911 	s32 status;
912 	u32 ctrl, i, autoc, autoc2;
913 	u32 curr_lms;
914 	bool link_up = false;
915 
916 	/* Call adapter stop to disable tx/rx and clear interrupts */
917 	status = hw->mac.ops.stop_adapter(hw);
918 	if (status)
919 		return status;
920 
921 	/* flush pending Tx transactions */
922 	ixgbe_clear_tx_pending(hw);
923 
924 	/* PHY ops must be identified and initialized prior to reset */
925 
926 	/* Identify PHY and related function pointers */
927 	status = hw->phy.ops.init(hw);
928 
929 	if (status == -EOPNOTSUPP)
930 		return status;
931 
932 	/* Setup SFP module if there is one present. */
933 	if (hw->phy.sfp_setup_needed) {
934 		status = hw->mac.ops.setup_sfp(hw);
935 		hw->phy.sfp_setup_needed = false;
936 	}
937 
938 	if (status == -EOPNOTSUPP)
939 		return status;
940 
941 	/* Reset PHY */
942 	if (hw->phy.reset_disable == false && hw->phy.ops.reset != NULL)
943 		hw->phy.ops.reset(hw);
944 
945 	/* remember AUTOC from before we reset */
946 	curr_lms = IXGBE_READ_REG(hw, IXGBE_AUTOC) & IXGBE_AUTOC_LMS_MASK;
947 
948 mac_reset_top:
949 	/*
950 	 * Issue global reset to the MAC. Needs to be SW reset if link is up.
951 	 * If link reset is used when link is up, it might reset the PHY when
952 	 * mng is using it.  If link is down or the flag to force full link
953 	 * reset is set, then perform link reset.
954 	 */
955 	ctrl = IXGBE_CTRL_LNK_RST;
956 	if (!hw->force_full_reset) {
957 		hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
958 		if (link_up)
959 			ctrl = IXGBE_CTRL_RST;
960 	}
961 
962 	ctrl |= IXGBE_READ_REG(hw, IXGBE_CTRL);
963 	IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
964 	IXGBE_WRITE_FLUSH(hw);
965 	usleep_range(1000, 1200);
966 
967 	/* Poll for reset bit to self-clear indicating reset is complete */
968 	for (i = 0; i < 10; i++) {
969 		ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
970 		if (!(ctrl & IXGBE_CTRL_RST_MASK))
971 			break;
972 		udelay(1);
973 	}
974 
975 	if (ctrl & IXGBE_CTRL_RST_MASK) {
976 		status = -EIO;
977 		hw_dbg(hw, "Reset polling failed to complete.\n");
978 	}
979 
980 	msleep(50);
981 
982 	/*
983 	 * Double resets are required for recovery from certain error
984 	 * conditions.  Between resets, it is necessary to stall to allow time
985 	 * for any pending HW events to complete.
986 	 */
987 	if (hw->mac.flags & IXGBE_FLAGS_DOUBLE_RESET_REQUIRED) {
988 		hw->mac.flags &= ~IXGBE_FLAGS_DOUBLE_RESET_REQUIRED;
989 		goto mac_reset_top;
990 	}
991 
992 	/*
993 	 * Store the original AUTOC/AUTOC2 values if they have not been
994 	 * stored off yet.  Otherwise restore the stored original
995 	 * values since the reset operation sets back to defaults.
996 	 */
997 	autoc = IXGBE_READ_REG(hw, IXGBE_AUTOC);
998 	autoc2 = IXGBE_READ_REG(hw, IXGBE_AUTOC2);
999 
1000 	/* Enable link if disabled in NVM */
1001 	if (autoc2 & IXGBE_AUTOC2_LINK_DISABLE_MASK) {
1002 		autoc2 &= ~IXGBE_AUTOC2_LINK_DISABLE_MASK;
1003 		IXGBE_WRITE_REG(hw, IXGBE_AUTOC2, autoc2);
1004 		IXGBE_WRITE_FLUSH(hw);
1005 	}
1006 
1007 	if (hw->mac.orig_link_settings_stored == false) {
1008 		hw->mac.orig_autoc = autoc;
1009 		hw->mac.orig_autoc2 = autoc2;
1010 		hw->mac.orig_link_settings_stored = true;
1011 	} else {
1012 
1013 		/* If MNG FW is running on a multi-speed device that
1014 		 * doesn't autoneg with out driver support we need to
1015 		 * leave LMS in the state it was before we MAC reset.
1016 		 * Likewise if we support WoL we don't want change the
1017 		 * LMS state either.
1018 		 */
1019 		if ((hw->phy.multispeed_fiber && ixgbe_mng_enabled(hw)) ||
1020 		    hw->wol_enabled)
1021 			hw->mac.orig_autoc =
1022 				(hw->mac.orig_autoc & ~IXGBE_AUTOC_LMS_MASK) |
1023 				curr_lms;
1024 
1025 		if (autoc != hw->mac.orig_autoc) {
1026 			status = hw->mac.ops.prot_autoc_write(hw,
1027 							hw->mac.orig_autoc,
1028 							false);
1029 			if (status)
1030 				return status;
1031 		}
1032 
1033 		if ((autoc2 & IXGBE_AUTOC2_UPPER_MASK) !=
1034 		    (hw->mac.orig_autoc2 & IXGBE_AUTOC2_UPPER_MASK)) {
1035 			autoc2 &= ~IXGBE_AUTOC2_UPPER_MASK;
1036 			autoc2 |= (hw->mac.orig_autoc2 &
1037 				   IXGBE_AUTOC2_UPPER_MASK);
1038 			IXGBE_WRITE_REG(hw, IXGBE_AUTOC2, autoc2);
1039 		}
1040 	}
1041 
1042 	/* Store the permanent mac address */
1043 	hw->mac.ops.get_mac_addr(hw, hw->mac.perm_addr);
1044 
1045 	/*
1046 	 * Store MAC address from RAR0, clear receive address registers, and
1047 	 * clear the multicast table.  Also reset num_rar_entries to 128,
1048 	 * since we modify this value when programming the SAN MAC address.
1049 	 */
1050 	hw->mac.num_rar_entries = IXGBE_82599_RAR_ENTRIES;
1051 	hw->mac.ops.init_rx_addrs(hw);
1052 
1053 	/* Store the permanent SAN mac address */
1054 	hw->mac.ops.get_san_mac_addr(hw, hw->mac.san_addr);
1055 
1056 	/* Add the SAN MAC address to the RAR only if it's a valid address */
1057 	if (is_valid_ether_addr(hw->mac.san_addr)) {
1058 		/* Save the SAN MAC RAR index */
1059 		hw->mac.san_mac_rar_index = hw->mac.num_rar_entries - 1;
1060 
1061 		hw->mac.ops.set_rar(hw, hw->mac.san_mac_rar_index,
1062 				    hw->mac.san_addr, 0, IXGBE_RAH_AV);
1063 
1064 		/* clear VMDq pool/queue selection for this RAR */
1065 		hw->mac.ops.clear_vmdq(hw, hw->mac.san_mac_rar_index,
1066 				       IXGBE_CLEAR_VMDQ_ALL);
1067 
1068 		/* Reserve the last RAR for the SAN MAC address */
1069 		hw->mac.num_rar_entries--;
1070 	}
1071 
1072 	/* Store the alternative WWNN/WWPN prefix */
1073 	hw->mac.ops.get_wwn_prefix(hw, &hw->mac.wwnn_prefix,
1074 				       &hw->mac.wwpn_prefix);
1075 
1076 	return status;
1077 }
1078 
1079 /**
1080  * ixgbe_fdir_check_cmd_complete - poll to check whether FDIRCMD is complete
1081  * @hw: pointer to hardware structure
1082  * @fdircmd: current value of FDIRCMD register
1083  */
1084 static s32 ixgbe_fdir_check_cmd_complete(struct ixgbe_hw *hw, u32 *fdircmd)
1085 {
1086 	int i;
1087 
1088 	for (i = 0; i < IXGBE_FDIRCMD_CMD_POLL; i++) {
1089 		*fdircmd = IXGBE_READ_REG(hw, IXGBE_FDIRCMD);
1090 		if (!(*fdircmd & IXGBE_FDIRCMD_CMD_MASK))
1091 			return 0;
1092 		udelay(10);
1093 	}
1094 
1095 	return -EIO;
1096 }
1097 
1098 /**
1099  *  ixgbe_reinit_fdir_tables_82599 - Reinitialize Flow Director tables.
1100  *  @hw: pointer to hardware structure
1101  **/
1102 s32 ixgbe_reinit_fdir_tables_82599(struct ixgbe_hw *hw)
1103 {
1104 	int i;
1105 	u32 fdirctrl = IXGBE_READ_REG(hw, IXGBE_FDIRCTRL);
1106 	u32 fdircmd;
1107 	s32 err;
1108 
1109 	fdirctrl &= ~IXGBE_FDIRCTRL_INIT_DONE;
1110 
1111 	/*
1112 	 * Before starting reinitialization process,
1113 	 * FDIRCMD.CMD must be zero.
1114 	 */
1115 	err = ixgbe_fdir_check_cmd_complete(hw, &fdircmd);
1116 	if (err) {
1117 		hw_dbg(hw, "Flow Director previous command did not complete, aborting table re-initialization.\n");
1118 		return err;
1119 	}
1120 
1121 	IXGBE_WRITE_REG(hw, IXGBE_FDIRFREE, 0);
1122 	IXGBE_WRITE_FLUSH(hw);
1123 	/*
1124 	 * 82599 adapters flow director init flow cannot be restarted,
1125 	 * Workaround 82599 silicon errata by performing the following steps
1126 	 * before re-writing the FDIRCTRL control register with the same value.
1127 	 * - write 1 to bit 8 of FDIRCMD register &
1128 	 * - write 0 to bit 8 of FDIRCMD register
1129 	 */
1130 	IXGBE_WRITE_REG(hw, IXGBE_FDIRCMD,
1131 			(IXGBE_READ_REG(hw, IXGBE_FDIRCMD) |
1132 			 IXGBE_FDIRCMD_CLEARHT));
1133 	IXGBE_WRITE_FLUSH(hw);
1134 	IXGBE_WRITE_REG(hw, IXGBE_FDIRCMD,
1135 			(IXGBE_READ_REG(hw, IXGBE_FDIRCMD) &
1136 			 ~IXGBE_FDIRCMD_CLEARHT));
1137 	IXGBE_WRITE_FLUSH(hw);
1138 	/*
1139 	 * Clear FDIR Hash register to clear any leftover hashes
1140 	 * waiting to be programmed.
1141 	 */
1142 	IXGBE_WRITE_REG(hw, IXGBE_FDIRHASH, 0x00);
1143 	IXGBE_WRITE_FLUSH(hw);
1144 
1145 	IXGBE_WRITE_REG(hw, IXGBE_FDIRCTRL, fdirctrl);
1146 	IXGBE_WRITE_FLUSH(hw);
1147 
1148 	/* Poll init-done after we write FDIRCTRL register */
1149 	for (i = 0; i < IXGBE_FDIR_INIT_DONE_POLL; i++) {
1150 		if (IXGBE_READ_REG(hw, IXGBE_FDIRCTRL) &
1151 				   IXGBE_FDIRCTRL_INIT_DONE)
1152 			break;
1153 		usleep_range(1000, 2000);
1154 	}
1155 	if (i >= IXGBE_FDIR_INIT_DONE_POLL) {
1156 		hw_dbg(hw, "Flow Director Signature poll time exceeded!\n");
1157 		return -EIO;
1158 	}
1159 
1160 	/* Clear FDIR statistics registers (read to clear) */
1161 	IXGBE_READ_REG(hw, IXGBE_FDIRUSTAT);
1162 	IXGBE_READ_REG(hw, IXGBE_FDIRFSTAT);
1163 	IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
1164 	IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
1165 	IXGBE_READ_REG(hw, IXGBE_FDIRLEN);
1166 
1167 	return 0;
1168 }
1169 
1170 /**
1171  *  ixgbe_fdir_enable_82599 - Initialize Flow Director control registers
1172  *  @hw: pointer to hardware structure
1173  *  @fdirctrl: value to write to flow director control register
1174  **/
1175 static void ixgbe_fdir_enable_82599(struct ixgbe_hw *hw, u32 fdirctrl)
1176 {
1177 	int i;
1178 
1179 	/* Prime the keys for hashing */
1180 	IXGBE_WRITE_REG(hw, IXGBE_FDIRHKEY, IXGBE_ATR_BUCKET_HASH_KEY);
1181 	IXGBE_WRITE_REG(hw, IXGBE_FDIRSKEY, IXGBE_ATR_SIGNATURE_HASH_KEY);
1182 
1183 	/*
1184 	 * Poll init-done after we write the register.  Estimated times:
1185 	 *      10G: PBALLOC = 11b, timing is 60us
1186 	 *       1G: PBALLOC = 11b, timing is 600us
1187 	 *     100M: PBALLOC = 11b, timing is 6ms
1188 	 *
1189 	 *     Multiple these timings by 4 if under full Rx load
1190 	 *
1191 	 * So we'll poll for IXGBE_FDIR_INIT_DONE_POLL times, sleeping for
1192 	 * 1 msec per poll time.  If we're at line rate and drop to 100M, then
1193 	 * this might not finish in our poll time, but we can live with that
1194 	 * for now.
1195 	 */
1196 	IXGBE_WRITE_REG(hw, IXGBE_FDIRCTRL, fdirctrl);
1197 	IXGBE_WRITE_FLUSH(hw);
1198 	for (i = 0; i < IXGBE_FDIR_INIT_DONE_POLL; i++) {
1199 		if (IXGBE_READ_REG(hw, IXGBE_FDIRCTRL) &
1200 				   IXGBE_FDIRCTRL_INIT_DONE)
1201 			break;
1202 		usleep_range(1000, 2000);
1203 	}
1204 
1205 	if (i >= IXGBE_FDIR_INIT_DONE_POLL)
1206 		hw_dbg(hw, "Flow Director poll time exceeded!\n");
1207 }
1208 
1209 /**
1210  *  ixgbe_init_fdir_signature_82599 - Initialize Flow Director signature filters
1211  *  @hw: pointer to hardware structure
1212  *  @fdirctrl: value to write to flow director control register, initially
1213  *             contains just the value of the Rx packet buffer allocation
1214  **/
1215 s32 ixgbe_init_fdir_signature_82599(struct ixgbe_hw *hw, u32 fdirctrl)
1216 {
1217 	/*
1218 	 * Continue setup of fdirctrl register bits:
1219 	 *  Move the flexible bytes to use the ethertype - shift 6 words
1220 	 *  Set the maximum length per hash bucket to 0xA filters
1221 	 *  Send interrupt when 64 filters are left
1222 	 */
1223 	fdirctrl |= (0x6 << IXGBE_FDIRCTRL_FLEX_SHIFT) |
1224 		    (0xA << IXGBE_FDIRCTRL_MAX_LENGTH_SHIFT) |
1225 		    (4 << IXGBE_FDIRCTRL_FULL_THRESH_SHIFT);
1226 
1227 	/* write hashes and fdirctrl register, poll for completion */
1228 	ixgbe_fdir_enable_82599(hw, fdirctrl);
1229 
1230 	return 0;
1231 }
1232 
1233 /**
1234  *  ixgbe_init_fdir_perfect_82599 - Initialize Flow Director perfect filters
1235  *  @hw: pointer to hardware structure
1236  *  @fdirctrl: value to write to flow director control register, initially
1237  *             contains just the value of the Rx packet buffer allocation
1238  **/
1239 s32 ixgbe_init_fdir_perfect_82599(struct ixgbe_hw *hw, u32 fdirctrl)
1240 {
1241 	/*
1242 	 * Continue setup of fdirctrl register bits:
1243 	 *  Turn perfect match filtering on
1244 	 *  Initialize the drop queue
1245 	 *  Move the flexible bytes to use the ethertype - shift 6 words
1246 	 *  Set the maximum length per hash bucket to 0xA filters
1247 	 *  Send interrupt when 64 (0x4 * 16) filters are left
1248 	 */
1249 	fdirctrl |= IXGBE_FDIRCTRL_PERFECT_MATCH |
1250 		    (IXGBE_FDIR_DROP_QUEUE << IXGBE_FDIRCTRL_DROP_Q_SHIFT) |
1251 		    (0x6 << IXGBE_FDIRCTRL_FLEX_SHIFT) |
1252 		    (0xA << IXGBE_FDIRCTRL_MAX_LENGTH_SHIFT) |
1253 		    (4 << IXGBE_FDIRCTRL_FULL_THRESH_SHIFT);
1254 
1255 	/* write hashes and fdirctrl register, poll for completion */
1256 	ixgbe_fdir_enable_82599(hw, fdirctrl);
1257 
1258 	return 0;
1259 }
1260 
1261 /*
1262  * These defines allow us to quickly generate all of the necessary instructions
1263  * in the function below by simply calling out IXGBE_COMPUTE_SIG_HASH_ITERATION
1264  * for values 0 through 15
1265  */
1266 #define IXGBE_ATR_COMMON_HASH_KEY \
1267 		(IXGBE_ATR_BUCKET_HASH_KEY & IXGBE_ATR_SIGNATURE_HASH_KEY)
1268 #define IXGBE_COMPUTE_SIG_HASH_ITERATION(_n) \
1269 do { \
1270 	u32 n = (_n); \
1271 	if (IXGBE_ATR_COMMON_HASH_KEY & BIT(n)) \
1272 		common_hash ^= lo_hash_dword >> n; \
1273 	else if (IXGBE_ATR_BUCKET_HASH_KEY & BIT(n)) \
1274 		bucket_hash ^= lo_hash_dword >> n; \
1275 	else if (IXGBE_ATR_SIGNATURE_HASH_KEY & BIT(n)) \
1276 		sig_hash ^= lo_hash_dword << (16 - n); \
1277 	if (IXGBE_ATR_COMMON_HASH_KEY & BIT(n + 16)) \
1278 		common_hash ^= hi_hash_dword >> n; \
1279 	else if (IXGBE_ATR_BUCKET_HASH_KEY & BIT(n + 16)) \
1280 		bucket_hash ^= hi_hash_dword >> n; \
1281 	else if (IXGBE_ATR_SIGNATURE_HASH_KEY & BIT(n + 16)) \
1282 		sig_hash ^= hi_hash_dword << (16 - n); \
1283 } while (0)
1284 
1285 /**
1286  *  ixgbe_atr_compute_sig_hash_82599 - Compute the signature hash
1287  *  @input: input bitstream to compute the hash on
1288  *  @common: compressed common input dword
1289  *
1290  *  This function is almost identical to the function above but contains
1291  *  several optimizations such as unwinding all of the loops, letting the
1292  *  compiler work out all of the conditional ifs since the keys are static
1293  *  defines, and computing two keys at once since the hashed dword stream
1294  *  will be the same for both keys.
1295  **/
1296 static u32 ixgbe_atr_compute_sig_hash_82599(union ixgbe_atr_hash_dword input,
1297 					    union ixgbe_atr_hash_dword common)
1298 {
1299 	u32 hi_hash_dword, lo_hash_dword, flow_vm_vlan;
1300 	u32 sig_hash = 0, bucket_hash = 0, common_hash = 0;
1301 
1302 	/* record the flow_vm_vlan bits as they are a key part to the hash */
1303 	flow_vm_vlan = ntohl(input.dword);
1304 
1305 	/* generate common hash dword */
1306 	hi_hash_dword = ntohl(common.dword);
1307 
1308 	/* low dword is word swapped version of common */
1309 	lo_hash_dword = (hi_hash_dword >> 16) | (hi_hash_dword << 16);
1310 
1311 	/* apply flow ID/VM pool/VLAN ID bits to hash words */
1312 	hi_hash_dword ^= flow_vm_vlan ^ (flow_vm_vlan >> 16);
1313 
1314 	/* Process bits 0 and 16 */
1315 	IXGBE_COMPUTE_SIG_HASH_ITERATION(0);
1316 
1317 	/*
1318 	 * apply flow ID/VM pool/VLAN ID bits to lo hash dword, we had to
1319 	 * delay this because bit 0 of the stream should not be processed
1320 	 * so we do not add the vlan until after bit 0 was processed
1321 	 */
1322 	lo_hash_dword ^= flow_vm_vlan ^ (flow_vm_vlan << 16);
1323 
1324 	/* Process remaining 30 bit of the key */
1325 	IXGBE_COMPUTE_SIG_HASH_ITERATION(1);
1326 	IXGBE_COMPUTE_SIG_HASH_ITERATION(2);
1327 	IXGBE_COMPUTE_SIG_HASH_ITERATION(3);
1328 	IXGBE_COMPUTE_SIG_HASH_ITERATION(4);
1329 	IXGBE_COMPUTE_SIG_HASH_ITERATION(5);
1330 	IXGBE_COMPUTE_SIG_HASH_ITERATION(6);
1331 	IXGBE_COMPUTE_SIG_HASH_ITERATION(7);
1332 	IXGBE_COMPUTE_SIG_HASH_ITERATION(8);
1333 	IXGBE_COMPUTE_SIG_HASH_ITERATION(9);
1334 	IXGBE_COMPUTE_SIG_HASH_ITERATION(10);
1335 	IXGBE_COMPUTE_SIG_HASH_ITERATION(11);
1336 	IXGBE_COMPUTE_SIG_HASH_ITERATION(12);
1337 	IXGBE_COMPUTE_SIG_HASH_ITERATION(13);
1338 	IXGBE_COMPUTE_SIG_HASH_ITERATION(14);
1339 	IXGBE_COMPUTE_SIG_HASH_ITERATION(15);
1340 
1341 	/* combine common_hash result with signature and bucket hashes */
1342 	bucket_hash ^= common_hash;
1343 	bucket_hash &= IXGBE_ATR_HASH_MASK;
1344 
1345 	sig_hash ^= common_hash << 16;
1346 	sig_hash &= IXGBE_ATR_HASH_MASK << 16;
1347 
1348 	/* return completed signature hash */
1349 	return sig_hash ^ bucket_hash;
1350 }
1351 
1352 /**
1353  *  ixgbe_fdir_add_signature_filter_82599 - Adds a signature hash filter
1354  *  @hw: pointer to hardware structure
1355  *  @input: unique input dword
1356  *  @common: compressed common input dword
1357  *  @queue: queue index to direct traffic to
1358  *
1359  * Note that the tunnel bit in input must not be set when the hardware
1360  * tunneling support does not exist.
1361  **/
1362 s32 ixgbe_fdir_add_signature_filter_82599(struct ixgbe_hw *hw,
1363 					  union ixgbe_atr_hash_dword input,
1364 					  union ixgbe_atr_hash_dword common,
1365 					  u8 queue)
1366 {
1367 	u64 fdirhashcmd;
1368 	u8 flow_type;
1369 	bool tunnel;
1370 	u32 fdircmd;
1371 
1372 	/*
1373 	 * Get the flow_type in order to program FDIRCMD properly
1374 	 * lowest 2 bits are FDIRCMD.L4TYPE, third lowest bit is FDIRCMD.IPV6
1375 	 */
1376 	tunnel = !!(input.formatted.flow_type & IXGBE_ATR_L4TYPE_TUNNEL_MASK);
1377 	flow_type = input.formatted.flow_type &
1378 		    (IXGBE_ATR_L4TYPE_TUNNEL_MASK - 1);
1379 	switch (flow_type) {
1380 	case IXGBE_ATR_FLOW_TYPE_TCPV4:
1381 	case IXGBE_ATR_FLOW_TYPE_UDPV4:
1382 	case IXGBE_ATR_FLOW_TYPE_SCTPV4:
1383 	case IXGBE_ATR_FLOW_TYPE_TCPV6:
1384 	case IXGBE_ATR_FLOW_TYPE_UDPV6:
1385 	case IXGBE_ATR_FLOW_TYPE_SCTPV6:
1386 		break;
1387 	default:
1388 		hw_dbg(hw, " Error on flow type input\n");
1389 		return -EIO;
1390 	}
1391 
1392 	/* configure FDIRCMD register */
1393 	fdircmd = IXGBE_FDIRCMD_CMD_ADD_FLOW | IXGBE_FDIRCMD_FILTER_UPDATE |
1394 		  IXGBE_FDIRCMD_LAST | IXGBE_FDIRCMD_QUEUE_EN;
1395 	fdircmd |= (u32)flow_type << IXGBE_FDIRCMD_FLOW_TYPE_SHIFT;
1396 	fdircmd |= (u32)queue << IXGBE_FDIRCMD_RX_QUEUE_SHIFT;
1397 	if (tunnel)
1398 		fdircmd |= IXGBE_FDIRCMD_TUNNEL_FILTER;
1399 
1400 	/*
1401 	 * The lower 32-bits of fdirhashcmd is for FDIRHASH, the upper 32-bits
1402 	 * is for FDIRCMD.  Then do a 64-bit register write from FDIRHASH.
1403 	 */
1404 	fdirhashcmd = (u64)fdircmd << 32;
1405 	fdirhashcmd |= ixgbe_atr_compute_sig_hash_82599(input, common);
1406 	IXGBE_WRITE_REG64(hw, IXGBE_FDIRHASH, fdirhashcmd);
1407 
1408 	hw_dbg(hw, "Tx Queue=%x hash=%x\n", queue, (u32)fdirhashcmd);
1409 
1410 	return 0;
1411 }
1412 
1413 #define IXGBE_COMPUTE_BKT_HASH_ITERATION(_n) \
1414 do { \
1415 	u32 n = (_n); \
1416 	if (IXGBE_ATR_BUCKET_HASH_KEY & BIT(n)) \
1417 		bucket_hash ^= lo_hash_dword >> n; \
1418 	if (IXGBE_ATR_BUCKET_HASH_KEY & BIT(n + 16)) \
1419 		bucket_hash ^= hi_hash_dword >> n; \
1420 } while (0)
1421 
1422 /**
1423  *  ixgbe_atr_compute_perfect_hash_82599 - Compute the perfect filter hash
1424  *  @input: input bitstream to compute the hash on
1425  *  @input_mask: mask for the input bitstream
1426  *
1427  *  This function serves two main purposes.  First it applies the input_mask
1428  *  to the atr_input resulting in a cleaned up atr_input data stream.
1429  *  Secondly it computes the hash and stores it in the bkt_hash field at
1430  *  the end of the input byte stream.  This way it will be available for
1431  *  future use without needing to recompute the hash.
1432  **/
1433 void ixgbe_atr_compute_perfect_hash_82599(union ixgbe_atr_input *input,
1434 					  union ixgbe_atr_input *input_mask)
1435 {
1436 
1437 	u32 hi_hash_dword, lo_hash_dword, flow_vm_vlan;
1438 	u32 bucket_hash = 0;
1439 	__be32 hi_dword = 0;
1440 	int i;
1441 
1442 	/* Apply masks to input data */
1443 	for (i = 0; i <= 10; i++)
1444 		input->dword_stream[i] &= input_mask->dword_stream[i];
1445 
1446 	/* record the flow_vm_vlan bits as they are a key part to the hash */
1447 	flow_vm_vlan = ntohl(input->dword_stream[0]);
1448 
1449 	/* generate common hash dword */
1450 	for (i = 1; i <= 10; i++)
1451 		hi_dword ^= input->dword_stream[i];
1452 	hi_hash_dword = ntohl(hi_dword);
1453 
1454 	/* low dword is word swapped version of common */
1455 	lo_hash_dword = (hi_hash_dword >> 16) | (hi_hash_dword << 16);
1456 
1457 	/* apply flow ID/VM pool/VLAN ID bits to hash words */
1458 	hi_hash_dword ^= flow_vm_vlan ^ (flow_vm_vlan >> 16);
1459 
1460 	/* Process bits 0 and 16 */
1461 	IXGBE_COMPUTE_BKT_HASH_ITERATION(0);
1462 
1463 	/*
1464 	 * apply flow ID/VM pool/VLAN ID bits to lo hash dword, we had to
1465 	 * delay this because bit 0 of the stream should not be processed
1466 	 * so we do not add the vlan until after bit 0 was processed
1467 	 */
1468 	lo_hash_dword ^= flow_vm_vlan ^ (flow_vm_vlan << 16);
1469 
1470 	/* Process remaining 30 bit of the key */
1471 	for (i = 1; i <= 15; i++)
1472 		IXGBE_COMPUTE_BKT_HASH_ITERATION(i);
1473 
1474 	/*
1475 	 * Limit hash to 13 bits since max bucket count is 8K.
1476 	 * Store result at the end of the input stream.
1477 	 */
1478 	input->formatted.bkt_hash = (__force __be16)(bucket_hash & 0x1FFF);
1479 }
1480 
1481 /**
1482  *  ixgbe_get_fdirtcpm_82599 - generate a tcp port from atr_input_masks
1483  *  @input_mask: mask to be bit swapped
1484  *
1485  *  The source and destination port masks for flow director are bit swapped
1486  *  in that bit 15 effects bit 0, 14 effects 1, 13, 2 etc.  In order to
1487  *  generate a correctly swapped value we need to bit swap the mask and that
1488  *  is what is accomplished by this function.
1489  **/
1490 static u32 ixgbe_get_fdirtcpm_82599(union ixgbe_atr_input *input_mask)
1491 {
1492 	u32 mask = ntohs(input_mask->formatted.dst_port);
1493 
1494 	mask <<= IXGBE_FDIRTCPM_DPORTM_SHIFT;
1495 	mask |= ntohs(input_mask->formatted.src_port);
1496 	mask = ((mask & 0x55555555) << 1) | ((mask & 0xAAAAAAAA) >> 1);
1497 	mask = ((mask & 0x33333333) << 2) | ((mask & 0xCCCCCCCC) >> 2);
1498 	mask = ((mask & 0x0F0F0F0F) << 4) | ((mask & 0xF0F0F0F0) >> 4);
1499 	return ((mask & 0x00FF00FF) << 8) | ((mask & 0xFF00FF00) >> 8);
1500 }
1501 
1502 /*
1503  * These two macros are meant to address the fact that we have registers
1504  * that are either all or in part big-endian.  As a result on big-endian
1505  * systems we will end up byte swapping the value to little-endian before
1506  * it is byte swapped again and written to the hardware in the original
1507  * big-endian format.
1508  */
1509 #define IXGBE_STORE_AS_BE32(_value) \
1510 	(((u32)(_value) >> 24) | (((u32)(_value) & 0x00FF0000) >> 8) | \
1511 	 (((u32)(_value) & 0x0000FF00) << 8) | ((u32)(_value) << 24))
1512 
1513 #define IXGBE_WRITE_REG_BE32(a, reg, value) \
1514 	IXGBE_WRITE_REG((a), (reg), IXGBE_STORE_AS_BE32(ntohl(value)))
1515 
1516 #define IXGBE_STORE_AS_BE16(_value) __swab16(ntohs((_value)))
1517 
1518 s32 ixgbe_fdir_set_input_mask_82599(struct ixgbe_hw *hw,
1519 				    union ixgbe_atr_input *input_mask)
1520 {
1521 	/* mask IPv6 since it is currently not supported */
1522 	u32 fdirm = IXGBE_FDIRM_DIPv6;
1523 	u32 fdirtcpm;
1524 
1525 	/*
1526 	 * Program the relevant mask registers.  If src/dst_port or src/dst_addr
1527 	 * are zero, then assume a full mask for that field.  Also assume that
1528 	 * a VLAN of 0 is unspecified, so mask that out as well.  L4type
1529 	 * cannot be masked out in this implementation.
1530 	 *
1531 	 * This also assumes IPv4 only.  IPv6 masking isn't supported at this
1532 	 * point in time.
1533 	 */
1534 
1535 	/* verify bucket hash is cleared on hash generation */
1536 	if (input_mask->formatted.bkt_hash)
1537 		hw_dbg(hw, " bucket hash should always be 0 in mask\n");
1538 
1539 	/* Program FDIRM and verify partial masks */
1540 	switch (input_mask->formatted.vm_pool & 0x7F) {
1541 	case 0x0:
1542 		fdirm |= IXGBE_FDIRM_POOL;
1543 		break;
1544 	case 0x7F:
1545 		break;
1546 	default:
1547 		hw_dbg(hw, " Error on vm pool mask\n");
1548 		return -EIO;
1549 	}
1550 
1551 	switch (input_mask->formatted.flow_type & IXGBE_ATR_L4TYPE_MASK) {
1552 	case 0x0:
1553 		fdirm |= IXGBE_FDIRM_L4P;
1554 		if (input_mask->formatted.dst_port ||
1555 		    input_mask->formatted.src_port) {
1556 			hw_dbg(hw, " Error on src/dst port mask\n");
1557 			return -EIO;
1558 		}
1559 		break;
1560 	case IXGBE_ATR_L4TYPE_MASK:
1561 		break;
1562 	default:
1563 		hw_dbg(hw, " Error on flow type mask\n");
1564 		return -EIO;
1565 	}
1566 
1567 	switch (ntohs(input_mask->formatted.vlan_id) & 0xEFFF) {
1568 	case 0x0000:
1569 		/* mask VLAN ID */
1570 		fdirm |= IXGBE_FDIRM_VLANID;
1571 		fallthrough;
1572 	case 0x0FFF:
1573 		/* mask VLAN priority */
1574 		fdirm |= IXGBE_FDIRM_VLANP;
1575 		break;
1576 	case 0xE000:
1577 		/* mask VLAN ID only */
1578 		fdirm |= IXGBE_FDIRM_VLANID;
1579 		fallthrough;
1580 	case 0xEFFF:
1581 		/* no VLAN fields masked */
1582 		break;
1583 	default:
1584 		hw_dbg(hw, " Error on VLAN mask\n");
1585 		return -EIO;
1586 	}
1587 
1588 	switch ((__force u16)input_mask->formatted.flex_bytes & 0xFFFF) {
1589 	case 0x0000:
1590 		/* Mask Flex Bytes */
1591 		fdirm |= IXGBE_FDIRM_FLEX;
1592 		fallthrough;
1593 	case 0xFFFF:
1594 		break;
1595 	default:
1596 		hw_dbg(hw, " Error on flexible byte mask\n");
1597 		return -EIO;
1598 	}
1599 
1600 	/* Now mask VM pool and destination IPv6 - bits 5 and 2 */
1601 	IXGBE_WRITE_REG(hw, IXGBE_FDIRM, fdirm);
1602 
1603 	/* store the TCP/UDP port masks, bit reversed from port layout */
1604 	fdirtcpm = ixgbe_get_fdirtcpm_82599(input_mask);
1605 
1606 	/* write both the same so that UDP and TCP use the same mask */
1607 	IXGBE_WRITE_REG(hw, IXGBE_FDIRTCPM, ~fdirtcpm);
1608 	IXGBE_WRITE_REG(hw, IXGBE_FDIRUDPM, ~fdirtcpm);
1609 
1610 	/* also use it for SCTP */
1611 	switch (hw->mac.type) {
1612 	case ixgbe_mac_X550:
1613 	case ixgbe_mac_X550EM_x:
1614 	case ixgbe_mac_x550em_a:
1615 		IXGBE_WRITE_REG(hw, IXGBE_FDIRSCTPM, ~fdirtcpm);
1616 		break;
1617 	default:
1618 		break;
1619 	}
1620 
1621 	/* store source and destination IP masks (big-enian) */
1622 	IXGBE_WRITE_REG_BE32(hw, IXGBE_FDIRSIP4M,
1623 			     ~input_mask->formatted.src_ip[0]);
1624 	IXGBE_WRITE_REG_BE32(hw, IXGBE_FDIRDIP4M,
1625 			     ~input_mask->formatted.dst_ip[0]);
1626 
1627 	return 0;
1628 }
1629 
1630 s32 ixgbe_fdir_write_perfect_filter_82599(struct ixgbe_hw *hw,
1631 					  union ixgbe_atr_input *input,
1632 					  u16 soft_id, u8 queue)
1633 {
1634 	u32 fdirport, fdirvlan, fdirhash, fdircmd;
1635 	s32 err;
1636 
1637 	/* currently IPv6 is not supported, must be programmed with 0 */
1638 	IXGBE_WRITE_REG_BE32(hw, IXGBE_FDIRSIPv6(0),
1639 			     input->formatted.src_ip[0]);
1640 	IXGBE_WRITE_REG_BE32(hw, IXGBE_FDIRSIPv6(1),
1641 			     input->formatted.src_ip[1]);
1642 	IXGBE_WRITE_REG_BE32(hw, IXGBE_FDIRSIPv6(2),
1643 			     input->formatted.src_ip[2]);
1644 
1645 	/* record the source address (big-endian) */
1646 	IXGBE_WRITE_REG_BE32(hw, IXGBE_FDIRIPSA, input->formatted.src_ip[0]);
1647 
1648 	/* record the first 32 bits of the destination address (big-endian) */
1649 	IXGBE_WRITE_REG_BE32(hw, IXGBE_FDIRIPDA, input->formatted.dst_ip[0]);
1650 
1651 	/* record source and destination port (little-endian)*/
1652 	fdirport = be16_to_cpu(input->formatted.dst_port);
1653 	fdirport <<= IXGBE_FDIRPORT_DESTINATION_SHIFT;
1654 	fdirport |= be16_to_cpu(input->formatted.src_port);
1655 	IXGBE_WRITE_REG(hw, IXGBE_FDIRPORT, fdirport);
1656 
1657 	/* record vlan (little-endian) and flex_bytes(big-endian) */
1658 	fdirvlan = IXGBE_STORE_AS_BE16(input->formatted.flex_bytes);
1659 	fdirvlan <<= IXGBE_FDIRVLAN_FLEX_SHIFT;
1660 	fdirvlan |= ntohs(input->formatted.vlan_id);
1661 	IXGBE_WRITE_REG(hw, IXGBE_FDIRVLAN, fdirvlan);
1662 
1663 	/* configure FDIRHASH register */
1664 	fdirhash = (__force u32)input->formatted.bkt_hash;
1665 	fdirhash |= soft_id << IXGBE_FDIRHASH_SIG_SW_INDEX_SHIFT;
1666 	IXGBE_WRITE_REG(hw, IXGBE_FDIRHASH, fdirhash);
1667 
1668 	/*
1669 	 * flush all previous writes to make certain registers are
1670 	 * programmed prior to issuing the command
1671 	 */
1672 	IXGBE_WRITE_FLUSH(hw);
1673 
1674 	/* configure FDIRCMD register */
1675 	fdircmd = IXGBE_FDIRCMD_CMD_ADD_FLOW | IXGBE_FDIRCMD_FILTER_UPDATE |
1676 		  IXGBE_FDIRCMD_LAST | IXGBE_FDIRCMD_QUEUE_EN;
1677 	if (queue == IXGBE_FDIR_DROP_QUEUE)
1678 		fdircmd |= IXGBE_FDIRCMD_DROP;
1679 	fdircmd |= input->formatted.flow_type << IXGBE_FDIRCMD_FLOW_TYPE_SHIFT;
1680 	fdircmd |= (u32)queue << IXGBE_FDIRCMD_RX_QUEUE_SHIFT;
1681 	fdircmd |= (u32)input->formatted.vm_pool << IXGBE_FDIRCMD_VT_POOL_SHIFT;
1682 
1683 	IXGBE_WRITE_REG(hw, IXGBE_FDIRCMD, fdircmd);
1684 	err = ixgbe_fdir_check_cmd_complete(hw, &fdircmd);
1685 	if (err) {
1686 		hw_dbg(hw, "Flow Director command did not complete!\n");
1687 		return err;
1688 	}
1689 
1690 	return 0;
1691 }
1692 
1693 s32 ixgbe_fdir_erase_perfect_filter_82599(struct ixgbe_hw *hw,
1694 					  union ixgbe_atr_input *input,
1695 					  u16 soft_id)
1696 {
1697 	u32 fdirhash;
1698 	u32 fdircmd;
1699 	s32 err;
1700 
1701 	/* configure FDIRHASH register */
1702 	fdirhash = (__force u32)input->formatted.bkt_hash;
1703 	fdirhash |= soft_id << IXGBE_FDIRHASH_SIG_SW_INDEX_SHIFT;
1704 	IXGBE_WRITE_REG(hw, IXGBE_FDIRHASH, fdirhash);
1705 
1706 	/* flush hash to HW */
1707 	IXGBE_WRITE_FLUSH(hw);
1708 
1709 	/* Query if filter is present */
1710 	IXGBE_WRITE_REG(hw, IXGBE_FDIRCMD, IXGBE_FDIRCMD_CMD_QUERY_REM_FILT);
1711 
1712 	err = ixgbe_fdir_check_cmd_complete(hw, &fdircmd);
1713 	if (err) {
1714 		hw_dbg(hw, "Flow Director command did not complete!\n");
1715 		return err;
1716 	}
1717 
1718 	/* if filter exists in hardware then remove it */
1719 	if (fdircmd & IXGBE_FDIRCMD_FILTER_VALID) {
1720 		IXGBE_WRITE_REG(hw, IXGBE_FDIRHASH, fdirhash);
1721 		IXGBE_WRITE_FLUSH(hw);
1722 		IXGBE_WRITE_REG(hw, IXGBE_FDIRCMD,
1723 				IXGBE_FDIRCMD_CMD_REMOVE_FLOW);
1724 	}
1725 
1726 	return 0;
1727 }
1728 
1729 /**
1730  *  ixgbe_read_analog_reg8_82599 - Reads 8 bit Omer analog register
1731  *  @hw: pointer to hardware structure
1732  *  @reg: analog register to read
1733  *  @val: read value
1734  *
1735  *  Performs read operation to Omer analog register specified.
1736  **/
1737 static s32 ixgbe_read_analog_reg8_82599(struct ixgbe_hw *hw, u32 reg, u8 *val)
1738 {
1739 	u32  core_ctl;
1740 
1741 	IXGBE_WRITE_REG(hw, IXGBE_CORECTL, IXGBE_CORECTL_WRITE_CMD |
1742 			(reg << 8));
1743 	IXGBE_WRITE_FLUSH(hw);
1744 	udelay(10);
1745 	core_ctl = IXGBE_READ_REG(hw, IXGBE_CORECTL);
1746 	*val = (u8)core_ctl;
1747 
1748 	return 0;
1749 }
1750 
1751 /**
1752  *  ixgbe_write_analog_reg8_82599 - Writes 8 bit Omer analog register
1753  *  @hw: pointer to hardware structure
1754  *  @reg: atlas register to write
1755  *  @val: value to write
1756  *
1757  *  Performs write operation to Omer analog register specified.
1758  **/
1759 static s32 ixgbe_write_analog_reg8_82599(struct ixgbe_hw *hw, u32 reg, u8 val)
1760 {
1761 	u32  core_ctl;
1762 
1763 	core_ctl = (reg << 8) | val;
1764 	IXGBE_WRITE_REG(hw, IXGBE_CORECTL, core_ctl);
1765 	IXGBE_WRITE_FLUSH(hw);
1766 	udelay(10);
1767 
1768 	return 0;
1769 }
1770 
1771 /**
1772  *  ixgbe_start_hw_82599 - Prepare hardware for Tx/Rx
1773  *  @hw: pointer to hardware structure
1774  *
1775  *  Starts the hardware using the generic start_hw function
1776  *  and the generation start_hw function.
1777  *  Then performs revision-specific operations, if any.
1778  **/
1779 static s32 ixgbe_start_hw_82599(struct ixgbe_hw *hw)
1780 {
1781 	s32 ret_val = 0;
1782 
1783 	ret_val = ixgbe_start_hw_generic(hw);
1784 	if (ret_val)
1785 		return ret_val;
1786 
1787 	ret_val = ixgbe_start_hw_gen2(hw);
1788 	if (ret_val)
1789 		return ret_val;
1790 
1791 	/* We need to run link autotry after the driver loads */
1792 	hw->mac.autotry_restart = true;
1793 
1794 	return ixgbe_verify_fw_version_82599(hw);
1795 }
1796 
1797 /**
1798  *  ixgbe_identify_phy_82599 - Get physical layer module
1799  *  @hw: pointer to hardware structure
1800  *
1801  *  Determines the physical layer module found on the current adapter.
1802  *  If PHY already detected, maintains current PHY type in hw struct,
1803  *  otherwise executes the PHY detection routine.
1804  **/
1805 static s32 ixgbe_identify_phy_82599(struct ixgbe_hw *hw)
1806 {
1807 	s32 status;
1808 
1809 	/* Detect PHY if not unknown - returns success if already detected. */
1810 	status = ixgbe_identify_phy_generic(hw);
1811 	if (status) {
1812 		/* 82599 10GBASE-T requires an external PHY */
1813 		if (hw->mac.ops.get_media_type(hw) == ixgbe_media_type_copper)
1814 			return status;
1815 		status = ixgbe_identify_module_generic(hw);
1816 	}
1817 
1818 	/* Set PHY type none if no PHY detected */
1819 	if (hw->phy.type == ixgbe_phy_unknown) {
1820 		hw->phy.type = ixgbe_phy_none;
1821 		status = 0;
1822 	}
1823 
1824 	/* Return error if SFP module has been detected but is not supported */
1825 	if (hw->phy.type == ixgbe_phy_sfp_unsupported)
1826 		return -EOPNOTSUPP;
1827 
1828 	return status;
1829 }
1830 
1831 /**
1832  *  ixgbe_enable_rx_dma_82599 - Enable the Rx DMA unit on 82599
1833  *  @hw: pointer to hardware structure
1834  *  @regval: register value to write to RXCTRL
1835  *
1836  *  Enables the Rx DMA unit for 82599
1837  **/
1838 static s32 ixgbe_enable_rx_dma_82599(struct ixgbe_hw *hw, u32 regval)
1839 {
1840 	/*
1841 	 * Workaround for 82599 silicon errata when enabling the Rx datapath.
1842 	 * If traffic is incoming before we enable the Rx unit, it could hang
1843 	 * the Rx DMA unit.  Therefore, make sure the security engine is
1844 	 * completely disabled prior to enabling the Rx unit.
1845 	 */
1846 	hw->mac.ops.disable_rx_buff(hw);
1847 
1848 	if (regval & IXGBE_RXCTRL_RXEN)
1849 		hw->mac.ops.enable_rx(hw);
1850 	else
1851 		hw->mac.ops.disable_rx(hw);
1852 
1853 	hw->mac.ops.enable_rx_buff(hw);
1854 
1855 	return 0;
1856 }
1857 
1858 /**
1859  *  ixgbe_verify_fw_version_82599 - verify fw version for 82599
1860  *  @hw: pointer to hardware structure
1861  *
1862  *  Verifies that installed the firmware version is 0.6 or higher
1863  *  for SFI devices. All 82599 SFI devices should have version 0.6 or higher.
1864  *
1865  *  Return: -EACCES if the FW is not present or if the FW version is
1866  *  not supported.
1867  **/
1868 static s32 ixgbe_verify_fw_version_82599(struct ixgbe_hw *hw)
1869 {
1870 	u16 fw_offset, fw_ptp_cfg_offset;
1871 	s32 status = -EACCES;
1872 	u16 offset;
1873 	u16 fw_version = 0;
1874 
1875 	/* firmware check is only necessary for SFI devices */
1876 	if (hw->phy.media_type != ixgbe_media_type_fiber)
1877 		return 0;
1878 
1879 	/* get the offset to the Firmware Module block */
1880 	offset = IXGBE_FW_PTR;
1881 	if (hw->eeprom.ops.read(hw, offset, &fw_offset))
1882 		goto fw_version_err;
1883 
1884 	if (fw_offset == 0 || fw_offset == 0xFFFF)
1885 		return -EACCES;
1886 
1887 	/* get the offset to the Pass Through Patch Configuration block */
1888 	offset = fw_offset + IXGBE_FW_PASSTHROUGH_PATCH_CONFIG_PTR;
1889 	if (hw->eeprom.ops.read(hw, offset, &fw_ptp_cfg_offset))
1890 		goto fw_version_err;
1891 
1892 	if (fw_ptp_cfg_offset == 0 || fw_ptp_cfg_offset == 0xFFFF)
1893 		return -EACCES;
1894 
1895 	/* get the firmware version */
1896 	offset = fw_ptp_cfg_offset + IXGBE_FW_PATCH_VERSION_4;
1897 	if (hw->eeprom.ops.read(hw, offset, &fw_version))
1898 		goto fw_version_err;
1899 
1900 	if (fw_version > 0x5)
1901 		status = 0;
1902 
1903 	return status;
1904 
1905 fw_version_err:
1906 	hw_err(hw, "eeprom read at offset %d failed\n", offset);
1907 	return -EACCES;
1908 }
1909 
1910 /**
1911  *  ixgbe_verify_lesm_fw_enabled_82599 - Checks LESM FW module state.
1912  *  @hw: pointer to hardware structure
1913  *
1914  *  Returns true if the LESM FW module is present and enabled. Otherwise
1915  *  returns false. Smart Speed must be disabled if LESM FW module is enabled.
1916  **/
1917 static bool ixgbe_verify_lesm_fw_enabled_82599(struct ixgbe_hw *hw)
1918 {
1919 	u16 fw_offset, fw_lesm_param_offset, fw_lesm_state;
1920 	s32 status;
1921 
1922 	/* get the offset to the Firmware Module block */
1923 	status = hw->eeprom.ops.read(hw, IXGBE_FW_PTR, &fw_offset);
1924 
1925 	if (status || fw_offset == 0 || fw_offset == 0xFFFF)
1926 		return false;
1927 
1928 	/* get the offset to the LESM Parameters block */
1929 	status = hw->eeprom.ops.read(hw, (fw_offset +
1930 				     IXGBE_FW_LESM_PARAMETERS_PTR),
1931 				     &fw_lesm_param_offset);
1932 
1933 	if (status ||
1934 	    fw_lesm_param_offset == 0 || fw_lesm_param_offset == 0xFFFF)
1935 		return false;
1936 
1937 	/* get the lesm state word */
1938 	status = hw->eeprom.ops.read(hw, (fw_lesm_param_offset +
1939 				     IXGBE_FW_LESM_STATE_1),
1940 				     &fw_lesm_state);
1941 
1942 	if (!status && (fw_lesm_state & IXGBE_FW_LESM_STATE_ENABLED))
1943 		return true;
1944 
1945 	return false;
1946 }
1947 
1948 /**
1949  *  ixgbe_read_eeprom_buffer_82599 - Read EEPROM word(s) using
1950  *  fastest available method
1951  *
1952  *  @hw: pointer to hardware structure
1953  *  @offset: offset of  word in EEPROM to read
1954  *  @words: number of words
1955  *  @data: word(s) read from the EEPROM
1956  *
1957  *  Retrieves 16 bit word(s) read from EEPROM
1958  **/
1959 static s32 ixgbe_read_eeprom_buffer_82599(struct ixgbe_hw *hw, u16 offset,
1960 					  u16 words, u16 *data)
1961 {
1962 	struct ixgbe_eeprom_info *eeprom = &hw->eeprom;
1963 
1964 	/* If EEPROM is detected and can be addressed using 14 bits,
1965 	 * use EERD otherwise use bit bang
1966 	 */
1967 	if (eeprom->type == ixgbe_eeprom_spi &&
1968 	    offset + (words - 1) <= IXGBE_EERD_MAX_ADDR)
1969 		return ixgbe_read_eerd_buffer_generic(hw, offset, words, data);
1970 
1971 	return ixgbe_read_eeprom_buffer_bit_bang_generic(hw, offset, words,
1972 							 data);
1973 }
1974 
1975 /**
1976  *  ixgbe_read_eeprom_82599 - Read EEPROM word using
1977  *  fastest available method
1978  *
1979  *  @hw: pointer to hardware structure
1980  *  @offset: offset of  word in the EEPROM to read
1981  *  @data: word read from the EEPROM
1982  *
1983  *  Reads a 16 bit word from the EEPROM
1984  **/
1985 static s32 ixgbe_read_eeprom_82599(struct ixgbe_hw *hw,
1986 				   u16 offset, u16 *data)
1987 {
1988 	struct ixgbe_eeprom_info *eeprom = &hw->eeprom;
1989 
1990 	/*
1991 	 * If EEPROM is detected and can be addressed using 14 bits,
1992 	 * use EERD otherwise use bit bang
1993 	 */
1994 	if (eeprom->type == ixgbe_eeprom_spi && offset <= IXGBE_EERD_MAX_ADDR)
1995 		return ixgbe_read_eerd_generic(hw, offset, data);
1996 
1997 	return ixgbe_read_eeprom_bit_bang_generic(hw, offset, data);
1998 }
1999 
2000 /**
2001  * ixgbe_reset_pipeline_82599 - perform pipeline reset
2002  *
2003  * @hw: pointer to hardware structure
2004  *
2005  * Reset pipeline by asserting Restart_AN together with LMS change to ensure
2006  * full pipeline reset.  Note - We must hold the SW/FW semaphore before writing
2007  * to AUTOC, so this function assumes the semaphore is held.
2008  **/
2009 static s32 ixgbe_reset_pipeline_82599(struct ixgbe_hw *hw)
2010 {
2011 	s32 ret_val;
2012 	u32 anlp1_reg = 0;
2013 	u32 i, autoc_reg, autoc2_reg;
2014 
2015 	/* Enable link if disabled in NVM */
2016 	autoc2_reg = IXGBE_READ_REG(hw, IXGBE_AUTOC2);
2017 	if (autoc2_reg & IXGBE_AUTOC2_LINK_DISABLE_MASK) {
2018 		autoc2_reg &= ~IXGBE_AUTOC2_LINK_DISABLE_MASK;
2019 		IXGBE_WRITE_REG(hw, IXGBE_AUTOC2, autoc2_reg);
2020 		IXGBE_WRITE_FLUSH(hw);
2021 	}
2022 
2023 	autoc_reg = IXGBE_READ_REG(hw, IXGBE_AUTOC);
2024 	autoc_reg |= IXGBE_AUTOC_AN_RESTART;
2025 
2026 	/* Write AUTOC register with toggled LMS[2] bit and Restart_AN */
2027 	IXGBE_WRITE_REG(hw, IXGBE_AUTOC,
2028 			autoc_reg ^ (0x4 << IXGBE_AUTOC_LMS_SHIFT));
2029 
2030 	/* Wait for AN to leave state 0 */
2031 	for (i = 0; i < 10; i++) {
2032 		usleep_range(4000, 8000);
2033 		anlp1_reg = IXGBE_READ_REG(hw, IXGBE_ANLP1);
2034 		if (anlp1_reg & IXGBE_ANLP1_AN_STATE_MASK)
2035 			break;
2036 	}
2037 
2038 	if (!(anlp1_reg & IXGBE_ANLP1_AN_STATE_MASK)) {
2039 		hw_dbg(hw, "auto negotiation not completed\n");
2040 		ret_val = -EIO;
2041 		goto reset_pipeline_out;
2042 	}
2043 
2044 	ret_val = 0;
2045 
2046 reset_pipeline_out:
2047 	/* Write AUTOC register with original LMS field and Restart_AN */
2048 	IXGBE_WRITE_REG(hw, IXGBE_AUTOC, autoc_reg);
2049 	IXGBE_WRITE_FLUSH(hw);
2050 
2051 	return ret_val;
2052 }
2053 
2054 /**
2055  *  ixgbe_read_i2c_byte_82599 - Reads 8 bit word over I2C
2056  *  @hw: pointer to hardware structure
2057  *  @byte_offset: byte offset to read
2058  *  @dev_addr: address to read from
2059  *  @data: value read
2060  *
2061  *  Performs byte read operation to SFP module's EEPROM over I2C interface at
2062  *  a specified device address.
2063  **/
2064 static s32 ixgbe_read_i2c_byte_82599(struct ixgbe_hw *hw, u8 byte_offset,
2065 				     u8 dev_addr, u8 *data)
2066 {
2067 	u32 esdp;
2068 	s32 status;
2069 	s32 timeout = 200;
2070 
2071 	if (hw->phy.qsfp_shared_i2c_bus == true) {
2072 		/* Acquire I2C bus ownership. */
2073 		esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
2074 		esdp |= IXGBE_ESDP_SDP0;
2075 		IXGBE_WRITE_REG(hw, IXGBE_ESDP, esdp);
2076 		IXGBE_WRITE_FLUSH(hw);
2077 
2078 		while (timeout) {
2079 			esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
2080 			if (esdp & IXGBE_ESDP_SDP1)
2081 				break;
2082 
2083 			usleep_range(5000, 10000);
2084 			timeout--;
2085 		}
2086 
2087 		if (!timeout) {
2088 			hw_dbg(hw, "Driver can't access resource, acquiring I2C bus timeout.\n");
2089 			status = -EIO;
2090 			goto release_i2c_access;
2091 		}
2092 	}
2093 
2094 	status = ixgbe_read_i2c_byte_generic(hw, byte_offset, dev_addr, data);
2095 
2096 release_i2c_access:
2097 	if (hw->phy.qsfp_shared_i2c_bus == true) {
2098 		/* Release I2C bus ownership. */
2099 		esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
2100 		esdp &= ~IXGBE_ESDP_SDP0;
2101 		IXGBE_WRITE_REG(hw, IXGBE_ESDP, esdp);
2102 		IXGBE_WRITE_FLUSH(hw);
2103 	}
2104 
2105 	return status;
2106 }
2107 
2108 /**
2109  *  ixgbe_write_i2c_byte_82599 - Writes 8 bit word over I2C
2110  *  @hw: pointer to hardware structure
2111  *  @byte_offset: byte offset to write
2112  *  @dev_addr: address to write to
2113  *  @data: value to write
2114  *
2115  *  Performs byte write operation to SFP module's EEPROM over I2C interface at
2116  *  a specified device address.
2117  **/
2118 static s32 ixgbe_write_i2c_byte_82599(struct ixgbe_hw *hw, u8 byte_offset,
2119 				      u8 dev_addr, u8 data)
2120 {
2121 	u32 esdp;
2122 	s32 status;
2123 	s32 timeout = 200;
2124 
2125 	if (hw->phy.qsfp_shared_i2c_bus == true) {
2126 		/* Acquire I2C bus ownership. */
2127 		esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
2128 		esdp |= IXGBE_ESDP_SDP0;
2129 		IXGBE_WRITE_REG(hw, IXGBE_ESDP, esdp);
2130 		IXGBE_WRITE_FLUSH(hw);
2131 
2132 		while (timeout) {
2133 			esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
2134 			if (esdp & IXGBE_ESDP_SDP1)
2135 				break;
2136 
2137 			usleep_range(5000, 10000);
2138 			timeout--;
2139 		}
2140 
2141 		if (!timeout) {
2142 			hw_dbg(hw, "Driver can't access resource, acquiring I2C bus timeout.\n");
2143 			status = -EIO;
2144 			goto release_i2c_access;
2145 		}
2146 	}
2147 
2148 	status = ixgbe_write_i2c_byte_generic(hw, byte_offset, dev_addr, data);
2149 
2150 release_i2c_access:
2151 	if (hw->phy.qsfp_shared_i2c_bus == true) {
2152 		/* Release I2C bus ownership. */
2153 		esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
2154 		esdp &= ~IXGBE_ESDP_SDP0;
2155 		IXGBE_WRITE_REG(hw, IXGBE_ESDP, esdp);
2156 		IXGBE_WRITE_FLUSH(hw);
2157 	}
2158 
2159 	return status;
2160 }
2161 
2162 static const struct ixgbe_mac_operations mac_ops_82599 = {
2163 	.init_hw                = &ixgbe_init_hw_generic,
2164 	.reset_hw               = &ixgbe_reset_hw_82599,
2165 	.start_hw               = &ixgbe_start_hw_82599,
2166 	.clear_hw_cntrs         = &ixgbe_clear_hw_cntrs_generic,
2167 	.get_media_type         = &ixgbe_get_media_type_82599,
2168 	.enable_rx_dma          = &ixgbe_enable_rx_dma_82599,
2169 	.disable_rx_buff	= &ixgbe_disable_rx_buff_generic,
2170 	.enable_rx_buff		= &ixgbe_enable_rx_buff_generic,
2171 	.get_mac_addr           = &ixgbe_get_mac_addr_generic,
2172 	.get_san_mac_addr       = &ixgbe_get_san_mac_addr_generic,
2173 	.get_device_caps        = &ixgbe_get_device_caps_generic,
2174 	.get_wwn_prefix         = &ixgbe_get_wwn_prefix_generic,
2175 	.stop_adapter           = &ixgbe_stop_adapter_generic,
2176 	.get_bus_info           = &ixgbe_get_bus_info_generic,
2177 	.set_lan_id             = &ixgbe_set_lan_id_multi_port_pcie,
2178 	.read_analog_reg8       = &ixgbe_read_analog_reg8_82599,
2179 	.write_analog_reg8      = &ixgbe_write_analog_reg8_82599,
2180 	.stop_link_on_d3	= &ixgbe_stop_mac_link_on_d3_82599,
2181 	.setup_link             = &ixgbe_setup_mac_link_82599,
2182 	.set_rxpba		= &ixgbe_set_rxpba_generic,
2183 	.check_link             = &ixgbe_check_mac_link_generic,
2184 	.get_link_capabilities  = &ixgbe_get_link_capabilities_82599,
2185 	.led_on                 = &ixgbe_led_on_generic,
2186 	.led_off                = &ixgbe_led_off_generic,
2187 	.init_led_link_act	= ixgbe_init_led_link_act_generic,
2188 	.blink_led_start        = &ixgbe_blink_led_start_generic,
2189 	.blink_led_stop         = &ixgbe_blink_led_stop_generic,
2190 	.set_rar                = &ixgbe_set_rar_generic,
2191 	.clear_rar              = &ixgbe_clear_rar_generic,
2192 	.set_vmdq               = &ixgbe_set_vmdq_generic,
2193 	.set_vmdq_san_mac	= &ixgbe_set_vmdq_san_mac_generic,
2194 	.clear_vmdq             = &ixgbe_clear_vmdq_generic,
2195 	.init_rx_addrs          = &ixgbe_init_rx_addrs_generic,
2196 	.update_mc_addr_list    = &ixgbe_update_mc_addr_list_generic,
2197 	.enable_mc              = &ixgbe_enable_mc_generic,
2198 	.disable_mc             = &ixgbe_disable_mc_generic,
2199 	.clear_vfta             = &ixgbe_clear_vfta_generic,
2200 	.set_vfta               = &ixgbe_set_vfta_generic,
2201 	.fc_enable              = &ixgbe_fc_enable_generic,
2202 	.setup_fc		= ixgbe_setup_fc_generic,
2203 	.fc_autoneg		= ixgbe_fc_autoneg,
2204 	.set_fw_drv_ver         = &ixgbe_set_fw_drv_ver_generic,
2205 	.init_uta_tables        = &ixgbe_init_uta_tables_generic,
2206 	.setup_sfp              = &ixgbe_setup_sfp_modules_82599,
2207 	.set_mac_anti_spoofing  = &ixgbe_set_mac_anti_spoofing,
2208 	.set_vlan_anti_spoofing = &ixgbe_set_vlan_anti_spoofing,
2209 	.acquire_swfw_sync      = &ixgbe_acquire_swfw_sync,
2210 	.release_swfw_sync      = &ixgbe_release_swfw_sync,
2211 	.init_swfw_sync		= NULL,
2212 	.get_thermal_sensor_data = &ixgbe_get_thermal_sensor_data_generic,
2213 	.init_thermal_sensor_thresh = &ixgbe_init_thermal_sensor_thresh_generic,
2214 	.prot_autoc_read	= &prot_autoc_read_82599,
2215 	.prot_autoc_write	= &prot_autoc_write_82599,
2216 	.enable_rx		= &ixgbe_enable_rx_generic,
2217 	.disable_rx		= &ixgbe_disable_rx_generic,
2218 };
2219 
2220 static const struct ixgbe_eeprom_operations eeprom_ops_82599 = {
2221 	.init_params		= &ixgbe_init_eeprom_params_generic,
2222 	.read			= &ixgbe_read_eeprom_82599,
2223 	.read_buffer		= &ixgbe_read_eeprom_buffer_82599,
2224 	.write			= &ixgbe_write_eeprom_generic,
2225 	.write_buffer		= &ixgbe_write_eeprom_buffer_bit_bang_generic,
2226 	.calc_checksum		= &ixgbe_calc_eeprom_checksum_generic,
2227 	.validate_checksum	= &ixgbe_validate_eeprom_checksum_generic,
2228 	.update_checksum	= &ixgbe_update_eeprom_checksum_generic,
2229 };
2230 
2231 static const struct ixgbe_phy_operations phy_ops_82599 = {
2232 	.identify		= &ixgbe_identify_phy_82599,
2233 	.identify_sfp		= &ixgbe_identify_module_generic,
2234 	.init			= &ixgbe_init_phy_ops_82599,
2235 	.reset			= &ixgbe_reset_phy_generic,
2236 	.read_reg		= &ixgbe_read_phy_reg_generic,
2237 	.write_reg		= &ixgbe_write_phy_reg_generic,
2238 	.setup_link		= &ixgbe_setup_phy_link_generic,
2239 	.setup_link_speed	= &ixgbe_setup_phy_link_speed_generic,
2240 	.read_i2c_byte		= &ixgbe_read_i2c_byte_generic,
2241 	.write_i2c_byte		= &ixgbe_write_i2c_byte_generic,
2242 	.read_i2c_sff8472	= &ixgbe_read_i2c_sff8472_generic,
2243 	.read_i2c_eeprom	= &ixgbe_read_i2c_eeprom_generic,
2244 	.write_i2c_eeprom	= &ixgbe_write_i2c_eeprom_generic,
2245 	.check_overtemp		= &ixgbe_tn_check_overtemp,
2246 };
2247 
2248 const struct ixgbe_info ixgbe_82599_info = {
2249 	.mac                    = ixgbe_mac_82599EB,
2250 	.get_invariants         = &ixgbe_get_invariants_82599,
2251 	.mac_ops                = &mac_ops_82599,
2252 	.eeprom_ops             = &eeprom_ops_82599,
2253 	.phy_ops                = &phy_ops_82599,
2254 	.mbx_ops                = &mbx_ops_generic,
2255 	.mvals			= ixgbe_mvals_8259X,
2256 };
2257