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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#include <linux/netdevice.h>
8
9#include "ixgbe.h"
10#include "ixgbe_common.h"
11#include "ixgbe_phy.h"
12
13static s32 ixgbe_acquire_eeprom(struct ixgbe_hw *hw);
14static s32 ixgbe_get_eeprom_semaphore(struct ixgbe_hw *hw);
15static void ixgbe_release_eeprom_semaphore(struct ixgbe_hw *hw);
16static s32 ixgbe_ready_eeprom(struct ixgbe_hw *hw);
17static void ixgbe_standby_eeprom(struct ixgbe_hw *hw);
18static void ixgbe_shift_out_eeprom_bits(struct ixgbe_hw *hw, u16 data,
19 u16 count);
20static u16 ixgbe_shift_in_eeprom_bits(struct ixgbe_hw *hw, u16 count);
21static void ixgbe_raise_eeprom_clk(struct ixgbe_hw *hw, u32 *eec);
22static void ixgbe_lower_eeprom_clk(struct ixgbe_hw *hw, u32 *eec);
23static void ixgbe_release_eeprom(struct ixgbe_hw *hw);
24
25static s32 ixgbe_mta_vector(struct ixgbe_hw *hw, u8 *mc_addr);
26static s32 ixgbe_poll_eerd_eewr_done(struct ixgbe_hw *hw, u32 ee_reg);
27static s32 ixgbe_read_eeprom_buffer_bit_bang(struct ixgbe_hw *hw, u16 offset,
28 u16 words, u16 *data);
29static s32 ixgbe_write_eeprom_buffer_bit_bang(struct ixgbe_hw *hw, u16 offset,
30 u16 words, u16 *data);
31static s32 ixgbe_detect_eeprom_page_size_generic(struct ixgbe_hw *hw,
32 u16 offset);
33static s32 ixgbe_disable_pcie_primary(struct ixgbe_hw *hw);
34
35/* Base table for registers values that change by MAC */
36const u32 ixgbe_mvals_8259X[IXGBE_MVALS_IDX_LIMIT] = {
37 IXGBE_MVALS_INIT(8259X)
38};
39
40/**
41 * ixgbe_device_supports_autoneg_fc - Check if phy supports autoneg flow
42 * control
43 * @hw: pointer to hardware structure
44 *
45 * There are several phys that do not support autoneg flow control. This
46 * function check the device id to see if the associated phy supports
47 * autoneg flow control.
48 **/
49bool ixgbe_device_supports_autoneg_fc(struct ixgbe_hw *hw)
50{
51 bool supported = false;
52 ixgbe_link_speed speed;
53 bool link_up;
54
55 switch (hw->phy.media_type) {
56 case ixgbe_media_type_fiber:
57 /* flow control autoneg black list */
58 switch (hw->device_id) {
59 case IXGBE_DEV_ID_X550EM_A_SFP:
60 case IXGBE_DEV_ID_X550EM_A_SFP_N:
61 supported = false;
62 break;
63 default:
64 hw->mac.ops.check_link(hw, &speed, &link_up, false);
65 /* if link is down, assume supported */
66 if (link_up)
67 supported = speed == IXGBE_LINK_SPEED_1GB_FULL;
68 else
69 supported = true;
70 }
71
72 break;
73 case ixgbe_media_type_backplane:
74 if (hw->device_id == IXGBE_DEV_ID_X550EM_X_XFI)
75 supported = false;
76 else
77 supported = true;
78 break;
79 case ixgbe_media_type_copper:
80 /* only some copper devices support flow control autoneg */
81 switch (hw->device_id) {
82 case IXGBE_DEV_ID_82599_T3_LOM:
83 case IXGBE_DEV_ID_X540T:
84 case IXGBE_DEV_ID_X540T1:
85 case IXGBE_DEV_ID_X550T:
86 case IXGBE_DEV_ID_X550T1:
87 case IXGBE_DEV_ID_X550EM_X_10G_T:
88 case IXGBE_DEV_ID_X550EM_A_10G_T:
89 case IXGBE_DEV_ID_X550EM_A_1G_T:
90 case IXGBE_DEV_ID_X550EM_A_1G_T_L:
91 supported = true;
92 break;
93 default:
94 break;
95 }
96 break;
97 default:
98 break;
99 }
100
101 if (!supported)
102 hw_dbg(hw, "Device %x does not support flow control autoneg\n",
103 hw->device_id);
104
105 return supported;
106}
107
108/**
109 * ixgbe_setup_fc_generic - Set up flow control
110 * @hw: pointer to hardware structure
111 *
112 * Called at init time to set up flow control.
113 **/
114s32 ixgbe_setup_fc_generic(struct ixgbe_hw *hw)
115{
116 s32 ret_val = 0;
117 u32 reg = 0, reg_bp = 0;
118 u16 reg_cu = 0;
119 bool locked = false;
120
121 /*
122 * Validate the requested mode. Strict IEEE mode does not allow
123 * ixgbe_fc_rx_pause because it will cause us to fail at UNH.
124 */
125 if (hw->fc.strict_ieee && hw->fc.requested_mode == ixgbe_fc_rx_pause) {
126 hw_dbg(hw, "ixgbe_fc_rx_pause not valid in strict IEEE mode\n");
127 return -EINVAL;
128 }
129
130 /*
131 * 10gig parts do not have a word in the EEPROM to determine the
132 * default flow control setting, so we explicitly set it to full.
133 */
134 if (hw->fc.requested_mode == ixgbe_fc_default)
135 hw->fc.requested_mode = ixgbe_fc_full;
136
137 /*
138 * Set up the 1G and 10G flow control advertisement registers so the
139 * HW will be able to do fc autoneg once the cable is plugged in. If
140 * we link at 10G, the 1G advertisement is harmless and vice versa.
141 */
142 switch (hw->phy.media_type) {
143 case ixgbe_media_type_backplane:
144 /* some MAC's need RMW protection on AUTOC */
145 ret_val = hw->mac.ops.prot_autoc_read(hw, &locked, ®_bp);
146 if (ret_val)
147 return ret_val;
148
149 fallthrough; /* only backplane uses autoc */
150 case ixgbe_media_type_fiber:
151 reg = IXGBE_READ_REG(hw, IXGBE_PCS1GANA);
152
153 break;
154 case ixgbe_media_type_copper:
155 hw->phy.ops.read_reg(hw, MDIO_AN_ADVERTISE,
156 MDIO_MMD_AN, ®_cu);
157 break;
158 default:
159 break;
160 }
161
162 /*
163 * The possible values of fc.requested_mode are:
164 * 0: Flow control is completely disabled
165 * 1: Rx flow control is enabled (we can receive pause frames,
166 * but not send pause frames).
167 * 2: Tx flow control is enabled (we can send pause frames but
168 * we do not support receiving pause frames).
169 * 3: Both Rx and Tx flow control (symmetric) are enabled.
170 * other: Invalid.
171 */
172 switch (hw->fc.requested_mode) {
173 case ixgbe_fc_none:
174 /* Flow control completely disabled by software override. */
175 reg &= ~(IXGBE_PCS1GANA_SYM_PAUSE | IXGBE_PCS1GANA_ASM_PAUSE);
176 if (hw->phy.media_type == ixgbe_media_type_backplane)
177 reg_bp &= ~(IXGBE_AUTOC_SYM_PAUSE |
178 IXGBE_AUTOC_ASM_PAUSE);
179 else if (hw->phy.media_type == ixgbe_media_type_copper)
180 reg_cu &= ~(IXGBE_TAF_SYM_PAUSE | IXGBE_TAF_ASM_PAUSE);
181 break;
182 case ixgbe_fc_tx_pause:
183 /*
184 * Tx Flow control is enabled, and Rx Flow control is
185 * disabled by software override.
186 */
187 reg |= IXGBE_PCS1GANA_ASM_PAUSE;
188 reg &= ~IXGBE_PCS1GANA_SYM_PAUSE;
189 if (hw->phy.media_type == ixgbe_media_type_backplane) {
190 reg_bp |= IXGBE_AUTOC_ASM_PAUSE;
191 reg_bp &= ~IXGBE_AUTOC_SYM_PAUSE;
192 } else if (hw->phy.media_type == ixgbe_media_type_copper) {
193 reg_cu |= IXGBE_TAF_ASM_PAUSE;
194 reg_cu &= ~IXGBE_TAF_SYM_PAUSE;
195 }
196 break;
197 case ixgbe_fc_rx_pause:
198 /*
199 * Rx Flow control is enabled and Tx Flow control is
200 * disabled by software override. Since there really
201 * isn't a way to advertise that we are capable of RX
202 * Pause ONLY, we will advertise that we support both
203 * symmetric and asymmetric Rx PAUSE, as such we fall
204 * through to the fc_full statement. Later, we will
205 * disable the adapter's ability to send PAUSE frames.
206 */
207 case ixgbe_fc_full:
208 /* Flow control (both Rx and Tx) is enabled by SW override. */
209 reg |= IXGBE_PCS1GANA_SYM_PAUSE | IXGBE_PCS1GANA_ASM_PAUSE;
210 if (hw->phy.media_type == ixgbe_media_type_backplane)
211 reg_bp |= IXGBE_AUTOC_SYM_PAUSE |
212 IXGBE_AUTOC_ASM_PAUSE;
213 else if (hw->phy.media_type == ixgbe_media_type_copper)
214 reg_cu |= IXGBE_TAF_SYM_PAUSE | IXGBE_TAF_ASM_PAUSE;
215 break;
216 default:
217 hw_dbg(hw, "Flow control param set incorrectly\n");
218 return -EIO;
219 }
220
221 if (hw->mac.type != ixgbe_mac_X540) {
222 /*
223 * Enable auto-negotiation between the MAC & PHY;
224 * the MAC will advertise clause 37 flow control.
225 */
226 IXGBE_WRITE_REG(hw, IXGBE_PCS1GANA, reg);
227 reg = IXGBE_READ_REG(hw, IXGBE_PCS1GLCTL);
228
229 /* Disable AN timeout */
230 if (hw->fc.strict_ieee)
231 reg &= ~IXGBE_PCS1GLCTL_AN_1G_TIMEOUT_EN;
232
233 IXGBE_WRITE_REG(hw, IXGBE_PCS1GLCTL, reg);
234 hw_dbg(hw, "Set up FC; PCS1GLCTL = 0x%08X\n", reg);
235 }
236
237 /*
238 * AUTOC restart handles negotiation of 1G and 10G on backplane
239 * and copper. There is no need to set the PCS1GCTL register.
240 *
241 */
242 if (hw->phy.media_type == ixgbe_media_type_backplane) {
243 /* Need the SW/FW semaphore around AUTOC writes if 82599 and
244 * LESM is on, likewise reset_pipeline requries the lock as
245 * it also writes AUTOC.
246 */
247 ret_val = hw->mac.ops.prot_autoc_write(hw, reg_bp, locked);
248 if (ret_val)
249 return ret_val;
250
251 } else if ((hw->phy.media_type == ixgbe_media_type_copper) &&
252 ixgbe_device_supports_autoneg_fc(hw)) {
253 hw->phy.ops.write_reg(hw, MDIO_AN_ADVERTISE,
254 MDIO_MMD_AN, reg_cu);
255 }
256
257 hw_dbg(hw, "Set up FC; IXGBE_AUTOC = 0x%08X\n", reg);
258 return ret_val;
259}
260
261/**
262 * ixgbe_start_hw_generic - Prepare hardware for Tx/Rx
263 * @hw: pointer to hardware structure
264 *
265 * Starts the hardware by filling the bus info structure and media type, clears
266 * all on chip counters, initializes receive address registers, multicast
267 * table, VLAN filter table, calls routine to set up link and flow control
268 * settings, and leaves transmit and receive units disabled and uninitialized
269 **/
270s32 ixgbe_start_hw_generic(struct ixgbe_hw *hw)
271{
272 s32 ret_val;
273 u32 ctrl_ext;
274 u16 device_caps;
275
276 /* Set the media type */
277 hw->phy.media_type = hw->mac.ops.get_media_type(hw);
278
279 /* Identify the PHY */
280 hw->phy.ops.identify(hw);
281
282 /* Clear the VLAN filter table */
283 hw->mac.ops.clear_vfta(hw);
284
285 /* Clear statistics registers */
286 hw->mac.ops.clear_hw_cntrs(hw);
287
288 /* Set No Snoop Disable */
289 ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
290 ctrl_ext |= IXGBE_CTRL_EXT_NS_DIS;
291 IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
292 IXGBE_WRITE_FLUSH(hw);
293
294 /* Setup flow control if method for doing so */
295 if (hw->mac.ops.setup_fc) {
296 ret_val = hw->mac.ops.setup_fc(hw);
297 if (ret_val)
298 return ret_val;
299 }
300
301 /* Cashe bit indicating need for crosstalk fix */
302 switch (hw->mac.type) {
303 case ixgbe_mac_82599EB:
304 case ixgbe_mac_X550EM_x:
305 case ixgbe_mac_x550em_a:
306 hw->mac.ops.get_device_caps(hw, &device_caps);
307 if (device_caps & IXGBE_DEVICE_CAPS_NO_CROSSTALK_WR)
308 hw->need_crosstalk_fix = false;
309 else
310 hw->need_crosstalk_fix = true;
311 break;
312 default:
313 hw->need_crosstalk_fix = false;
314 break;
315 }
316
317 /* Clear adapter stopped flag */
318 hw->adapter_stopped = false;
319
320 return 0;
321}
322
323/**
324 * ixgbe_start_hw_gen2 - Init sequence for common device family
325 * @hw: pointer to hw structure
326 *
327 * Performs the init sequence common to the second generation
328 * of 10 GbE devices.
329 * Devices in the second generation:
330 * 82599
331 * X540
332 **/
333s32 ixgbe_start_hw_gen2(struct ixgbe_hw *hw)
334{
335 u32 i;
336
337 /* Clear the rate limiters */
338 for (i = 0; i < hw->mac.max_tx_queues; i++) {
339 IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, i);
340 IXGBE_WRITE_REG(hw, IXGBE_RTTBCNRC, 0);
341 }
342 IXGBE_WRITE_FLUSH(hw);
343
344 return 0;
345}
346
347/**
348 * ixgbe_init_hw_generic - Generic hardware initialization
349 * @hw: pointer to hardware structure
350 *
351 * Initialize the hardware by resetting the hardware, filling the bus info
352 * structure and media type, clears all on chip counters, initializes receive
353 * address registers, multicast table, VLAN filter table, calls routine to set
354 * up link and flow control settings, and leaves transmit and receive units
355 * disabled and uninitialized
356 **/
357s32 ixgbe_init_hw_generic(struct ixgbe_hw *hw)
358{
359 s32 status;
360
361 /* Reset the hardware */
362 status = hw->mac.ops.reset_hw(hw);
363
364 if (status == 0) {
365 /* Start the HW */
366 status = hw->mac.ops.start_hw(hw);
367 }
368
369 /* Initialize the LED link active for LED blink support */
370 if (hw->mac.ops.init_led_link_act)
371 hw->mac.ops.init_led_link_act(hw);
372
373 return status;
374}
375
376/**
377 * ixgbe_clear_hw_cntrs_generic - Generic clear hardware counters
378 * @hw: pointer to hardware structure
379 *
380 * Clears all hardware statistics counters by reading them from the hardware
381 * Statistics counters are clear on read.
382 **/
383s32 ixgbe_clear_hw_cntrs_generic(struct ixgbe_hw *hw)
384{
385 u16 i = 0;
386
387 IXGBE_READ_REG(hw, IXGBE_CRCERRS);
388 IXGBE_READ_REG(hw, IXGBE_ILLERRC);
389 IXGBE_READ_REG(hw, IXGBE_ERRBC);
390 IXGBE_READ_REG(hw, IXGBE_MSPDC);
391 for (i = 0; i < 8; i++)
392 IXGBE_READ_REG(hw, IXGBE_MPC(i));
393
394 IXGBE_READ_REG(hw, IXGBE_MLFC);
395 IXGBE_READ_REG(hw, IXGBE_MRFC);
396 IXGBE_READ_REG(hw, IXGBE_RLEC);
397 IXGBE_READ_REG(hw, IXGBE_LXONTXC);
398 IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
399 if (hw->mac.type >= ixgbe_mac_82599EB) {
400 IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
401 IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
402 } else {
403 IXGBE_READ_REG(hw, IXGBE_LXONRXC);
404 IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
405 }
406
407 for (i = 0; i < 8; i++) {
408 IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
409 IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
410 if (hw->mac.type >= ixgbe_mac_82599EB) {
411 IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i));
412 IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i));
413 } else {
414 IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
415 IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
416 }
417 }
418 if (hw->mac.type >= ixgbe_mac_82599EB)
419 for (i = 0; i < 8; i++)
420 IXGBE_READ_REG(hw, IXGBE_PXON2OFFCNT(i));
421 IXGBE_READ_REG(hw, IXGBE_PRC64);
422 IXGBE_READ_REG(hw, IXGBE_PRC127);
423 IXGBE_READ_REG(hw, IXGBE_PRC255);
424 IXGBE_READ_REG(hw, IXGBE_PRC511);
425 IXGBE_READ_REG(hw, IXGBE_PRC1023);
426 IXGBE_READ_REG(hw, IXGBE_PRC1522);
427 IXGBE_READ_REG(hw, IXGBE_GPRC);
428 IXGBE_READ_REG(hw, IXGBE_BPRC);
429 IXGBE_READ_REG(hw, IXGBE_MPRC);
430 IXGBE_READ_REG(hw, IXGBE_GPTC);
431 IXGBE_READ_REG(hw, IXGBE_GORCL);
432 IXGBE_READ_REG(hw, IXGBE_GORCH);
433 IXGBE_READ_REG(hw, IXGBE_GOTCL);
434 IXGBE_READ_REG(hw, IXGBE_GOTCH);
435 if (hw->mac.type == ixgbe_mac_82598EB)
436 for (i = 0; i < 8; i++)
437 IXGBE_READ_REG(hw, IXGBE_RNBC(i));
438 IXGBE_READ_REG(hw, IXGBE_RUC);
439 IXGBE_READ_REG(hw, IXGBE_RFC);
440 IXGBE_READ_REG(hw, IXGBE_ROC);
441 IXGBE_READ_REG(hw, IXGBE_RJC);
442 IXGBE_READ_REG(hw, IXGBE_MNGPRC);
443 IXGBE_READ_REG(hw, IXGBE_MNGPDC);
444 IXGBE_READ_REG(hw, IXGBE_MNGPTC);
445 IXGBE_READ_REG(hw, IXGBE_TORL);
446 IXGBE_READ_REG(hw, IXGBE_TORH);
447 IXGBE_READ_REG(hw, IXGBE_TPR);
448 IXGBE_READ_REG(hw, IXGBE_TPT);
449 IXGBE_READ_REG(hw, IXGBE_PTC64);
450 IXGBE_READ_REG(hw, IXGBE_PTC127);
451 IXGBE_READ_REG(hw, IXGBE_PTC255);
452 IXGBE_READ_REG(hw, IXGBE_PTC511);
453 IXGBE_READ_REG(hw, IXGBE_PTC1023);
454 IXGBE_READ_REG(hw, IXGBE_PTC1522);
455 IXGBE_READ_REG(hw, IXGBE_MPTC);
456 IXGBE_READ_REG(hw, IXGBE_BPTC);
457 for (i = 0; i < 16; i++) {
458 IXGBE_READ_REG(hw, IXGBE_QPRC(i));
459 IXGBE_READ_REG(hw, IXGBE_QPTC(i));
460 if (hw->mac.type >= ixgbe_mac_82599EB) {
461 IXGBE_READ_REG(hw, IXGBE_QBRC_L(i));
462 IXGBE_READ_REG(hw, IXGBE_QBRC_H(i));
463 IXGBE_READ_REG(hw, IXGBE_QBTC_L(i));
464 IXGBE_READ_REG(hw, IXGBE_QBTC_H(i));
465 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
466 } else {
467 IXGBE_READ_REG(hw, IXGBE_QBRC(i));
468 IXGBE_READ_REG(hw, IXGBE_QBTC(i));
469 }
470 }
471
472 if (hw->mac.type == ixgbe_mac_X550 || hw->mac.type == ixgbe_mac_X540) {
473 if (hw->phy.id == 0)
474 hw->phy.ops.identify(hw);
475 hw->phy.ops.read_reg(hw, IXGBE_PCRC8ECL, MDIO_MMD_PCS, &i);
476 hw->phy.ops.read_reg(hw, IXGBE_PCRC8ECH, MDIO_MMD_PCS, &i);
477 hw->phy.ops.read_reg(hw, IXGBE_LDPCECL, MDIO_MMD_PCS, &i);
478 hw->phy.ops.read_reg(hw, IXGBE_LDPCECH, MDIO_MMD_PCS, &i);
479 }
480
481 return 0;
482}
483
484/**
485 * ixgbe_read_pba_string_generic - Reads part number string from EEPROM
486 * @hw: pointer to hardware structure
487 * @pba_num: stores the part number string from the EEPROM
488 * @pba_num_size: part number string buffer length
489 *
490 * Reads the part number string from the EEPROM.
491 **/
492s32 ixgbe_read_pba_string_generic(struct ixgbe_hw *hw, u8 *pba_num,
493 u32 pba_num_size)
494{
495 s32 ret_val;
496 u16 data;
497 u16 pba_ptr;
498 u16 offset;
499 u16 length;
500
501 if (pba_num == NULL) {
502 hw_dbg(hw, "PBA string buffer was null\n");
503 return -EINVAL;
504 }
505
506 ret_val = hw->eeprom.ops.read(hw, IXGBE_PBANUM0_PTR, &data);
507 if (ret_val) {
508 hw_dbg(hw, "NVM Read Error\n");
509 return ret_val;
510 }
511
512 ret_val = hw->eeprom.ops.read(hw, IXGBE_PBANUM1_PTR, &pba_ptr);
513 if (ret_val) {
514 hw_dbg(hw, "NVM Read Error\n");
515 return ret_val;
516 }
517
518 /*
519 * if data is not ptr guard the PBA must be in legacy format which
520 * means pba_ptr is actually our second data word for the PBA number
521 * and we can decode it into an ascii string
522 */
523 if (data != IXGBE_PBANUM_PTR_GUARD) {
524 hw_dbg(hw, "NVM PBA number is not stored as string\n");
525
526 /* we will need 11 characters to store the PBA */
527 if (pba_num_size < 11) {
528 hw_dbg(hw, "PBA string buffer too small\n");
529 return -ENOSPC;
530 }
531
532 /* extract hex string from data and pba_ptr */
533 pba_num[0] = (data >> 12) & 0xF;
534 pba_num[1] = (data >> 8) & 0xF;
535 pba_num[2] = (data >> 4) & 0xF;
536 pba_num[3] = data & 0xF;
537 pba_num[4] = (pba_ptr >> 12) & 0xF;
538 pba_num[5] = (pba_ptr >> 8) & 0xF;
539 pba_num[6] = '-';
540 pba_num[7] = 0;
541 pba_num[8] = (pba_ptr >> 4) & 0xF;
542 pba_num[9] = pba_ptr & 0xF;
543
544 /* put a null character on the end of our string */
545 pba_num[10] = '\0';
546
547 /* switch all the data but the '-' to hex char */
548 for (offset = 0; offset < 10; offset++) {
549 if (pba_num[offset] < 0xA)
550 pba_num[offset] += '0';
551 else if (pba_num[offset] < 0x10)
552 pba_num[offset] += 'A' - 0xA;
553 }
554
555 return 0;
556 }
557
558 ret_val = hw->eeprom.ops.read(hw, pba_ptr, &length);
559 if (ret_val) {
560 hw_dbg(hw, "NVM Read Error\n");
561 return ret_val;
562 }
563
564 if (length == 0xFFFF || length == 0) {
565 hw_dbg(hw, "NVM PBA number section invalid length\n");
566 return -EIO;
567 }
568
569 /* check if pba_num buffer is big enough */
570 if (pba_num_size < (((u32)length * 2) - 1)) {
571 hw_dbg(hw, "PBA string buffer too small\n");
572 return -ENOSPC;
573 }
574
575 /* trim pba length from start of string */
576 pba_ptr++;
577 length--;
578
579 for (offset = 0; offset < length; offset++) {
580 ret_val = hw->eeprom.ops.read(hw, pba_ptr + offset, &data);
581 if (ret_val) {
582 hw_dbg(hw, "NVM Read Error\n");
583 return ret_val;
584 }
585 pba_num[offset * 2] = (u8)(data >> 8);
586 pba_num[(offset * 2) + 1] = (u8)(data & 0xFF);
587 }
588 pba_num[offset * 2] = '\0';
589
590 return 0;
591}
592
593/**
594 * ixgbe_get_mac_addr_generic - Generic get MAC address
595 * @hw: pointer to hardware structure
596 * @mac_addr: Adapter MAC address
597 *
598 * Reads the adapter's MAC address from first Receive Address Register (RAR0)
599 * A reset of the adapter must be performed prior to calling this function
600 * in order for the MAC address to have been loaded from the EEPROM into RAR0
601 **/
602s32 ixgbe_get_mac_addr_generic(struct ixgbe_hw *hw, u8 *mac_addr)
603{
604 u32 rar_high;
605 u32 rar_low;
606 u16 i;
607
608 rar_high = IXGBE_READ_REG(hw, IXGBE_RAH(0));
609 rar_low = IXGBE_READ_REG(hw, IXGBE_RAL(0));
610
611 for (i = 0; i < 4; i++)
612 mac_addr[i] = (u8)(rar_low >> (i*8));
613
614 for (i = 0; i < 2; i++)
615 mac_addr[i+4] = (u8)(rar_high >> (i*8));
616
617 return 0;
618}
619
620enum ixgbe_bus_width ixgbe_convert_bus_width(u16 link_status)
621{
622 switch (link_status & IXGBE_PCI_LINK_WIDTH) {
623 case IXGBE_PCI_LINK_WIDTH_1:
624 return ixgbe_bus_width_pcie_x1;
625 case IXGBE_PCI_LINK_WIDTH_2:
626 return ixgbe_bus_width_pcie_x2;
627 case IXGBE_PCI_LINK_WIDTH_4:
628 return ixgbe_bus_width_pcie_x4;
629 case IXGBE_PCI_LINK_WIDTH_8:
630 return ixgbe_bus_width_pcie_x8;
631 default:
632 return ixgbe_bus_width_unknown;
633 }
634}
635
636enum ixgbe_bus_speed ixgbe_convert_bus_speed(u16 link_status)
637{
638 switch (link_status & IXGBE_PCI_LINK_SPEED) {
639 case IXGBE_PCI_LINK_SPEED_2500:
640 return ixgbe_bus_speed_2500;
641 case IXGBE_PCI_LINK_SPEED_5000:
642 return ixgbe_bus_speed_5000;
643 case IXGBE_PCI_LINK_SPEED_8000:
644 return ixgbe_bus_speed_8000;
645 default:
646 return ixgbe_bus_speed_unknown;
647 }
648}
649
650/**
651 * ixgbe_get_bus_info_generic - Generic set PCI bus info
652 * @hw: pointer to hardware structure
653 *
654 * Sets the PCI bus info (speed, width, type) within the ixgbe_hw structure
655 **/
656s32 ixgbe_get_bus_info_generic(struct ixgbe_hw *hw)
657{
658 u16 link_status;
659
660 hw->bus.type = ixgbe_bus_type_pci_express;
661
662 /* Get the negotiated link width and speed from PCI config space */
663 link_status = ixgbe_read_pci_cfg_word(hw, IXGBE_PCI_LINK_STATUS);
664
665 hw->bus.width = ixgbe_convert_bus_width(link_status);
666 hw->bus.speed = ixgbe_convert_bus_speed(link_status);
667
668 hw->mac.ops.set_lan_id(hw);
669
670 return 0;
671}
672
673/**
674 * ixgbe_set_lan_id_multi_port_pcie - Set LAN id for PCIe multiple port devices
675 * @hw: pointer to the HW structure
676 *
677 * Determines the LAN function id by reading memory-mapped registers
678 * and swaps the port value if requested.
679 **/
680void ixgbe_set_lan_id_multi_port_pcie(struct ixgbe_hw *hw)
681{
682 struct ixgbe_bus_info *bus = &hw->bus;
683 u16 ee_ctrl_4;
684 u32 reg;
685
686 reg = IXGBE_READ_REG(hw, IXGBE_STATUS);
687 bus->func = FIELD_GET(IXGBE_STATUS_LAN_ID, reg);
688 bus->lan_id = bus->func;
689
690 /* check for a port swap */
691 reg = IXGBE_READ_REG(hw, IXGBE_FACTPS(hw));
692 if (reg & IXGBE_FACTPS_LFS)
693 bus->func ^= 0x1;
694
695 /* Get MAC instance from EEPROM for configuring CS4227 */
696 if (hw->device_id == IXGBE_DEV_ID_X550EM_A_SFP) {
697 hw->eeprom.ops.read(hw, IXGBE_EEPROM_CTRL_4, &ee_ctrl_4);
698 bus->instance_id = FIELD_GET(IXGBE_EE_CTRL_4_INST_ID,
699 ee_ctrl_4);
700 }
701}
702
703/**
704 * ixgbe_stop_adapter_generic - Generic stop Tx/Rx units
705 * @hw: pointer to hardware structure
706 *
707 * Sets the adapter_stopped flag within ixgbe_hw struct. Clears interrupts,
708 * disables transmit and receive units. The adapter_stopped flag is used by
709 * the shared code and drivers to determine if the adapter is in a stopped
710 * state and should not touch the hardware.
711 **/
712s32 ixgbe_stop_adapter_generic(struct ixgbe_hw *hw)
713{
714 u32 reg_val;
715 u16 i;
716
717 /*
718 * Set the adapter_stopped flag so other driver functions stop touching
719 * the hardware
720 */
721 hw->adapter_stopped = true;
722
723 /* Disable the receive unit */
724 hw->mac.ops.disable_rx(hw);
725
726 /* Clear interrupt mask to stop interrupts from being generated */
727 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
728
729 /* Clear any pending interrupts, flush previous writes */
730 IXGBE_READ_REG(hw, IXGBE_EICR);
731
732 /* Disable the transmit unit. Each queue must be disabled. */
733 for (i = 0; i < hw->mac.max_tx_queues; i++)
734 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(i), IXGBE_TXDCTL_SWFLSH);
735
736 /* Disable the receive unit by stopping each queue */
737 for (i = 0; i < hw->mac.max_rx_queues; i++) {
738 reg_val = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
739 reg_val &= ~IXGBE_RXDCTL_ENABLE;
740 reg_val |= IXGBE_RXDCTL_SWFLSH;
741 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(i), reg_val);
742 }
743
744 /* flush all queues disables */
745 IXGBE_WRITE_FLUSH(hw);
746 usleep_range(1000, 2000);
747
748 /*
749 * Prevent the PCI-E bus from hanging by disabling PCI-E primary
750 * access and verify no pending requests
751 */
752 return ixgbe_disable_pcie_primary(hw);
753}
754
755/**
756 * ixgbe_init_led_link_act_generic - Store the LED index link/activity.
757 * @hw: pointer to hardware structure
758 *
759 * Store the index for the link active LED. This will be used to support
760 * blinking the LED.
761 **/
762s32 ixgbe_init_led_link_act_generic(struct ixgbe_hw *hw)
763{
764 struct ixgbe_mac_info *mac = &hw->mac;
765 u32 led_reg, led_mode;
766 u16 i;
767
768 led_reg = IXGBE_READ_REG(hw, IXGBE_LEDCTL);
769
770 /* Get LED link active from the LEDCTL register */
771 for (i = 0; i < 4; i++) {
772 led_mode = led_reg >> IXGBE_LED_MODE_SHIFT(i);
773
774 if ((led_mode & IXGBE_LED_MODE_MASK_BASE) ==
775 IXGBE_LED_LINK_ACTIVE) {
776 mac->led_link_act = i;
777 return 0;
778 }
779 }
780
781 /* If LEDCTL register does not have the LED link active set, then use
782 * known MAC defaults.
783 */
784 switch (hw->mac.type) {
785 case ixgbe_mac_x550em_a:
786 mac->led_link_act = 0;
787 break;
788 case ixgbe_mac_X550EM_x:
789 mac->led_link_act = 1;
790 break;
791 default:
792 mac->led_link_act = 2;
793 }
794
795 return 0;
796}
797
798/**
799 * ixgbe_led_on_generic - Turns on the software controllable LEDs.
800 * @hw: pointer to hardware structure
801 * @index: led number to turn on
802 **/
803s32 ixgbe_led_on_generic(struct ixgbe_hw *hw, u32 index)
804{
805 u32 led_reg = IXGBE_READ_REG(hw, IXGBE_LEDCTL);
806
807 if (index > 3)
808 return -EINVAL;
809
810 /* To turn on the LED, set mode to ON. */
811 led_reg &= ~IXGBE_LED_MODE_MASK(index);
812 led_reg |= IXGBE_LED_ON << IXGBE_LED_MODE_SHIFT(index);
813 IXGBE_WRITE_REG(hw, IXGBE_LEDCTL, led_reg);
814 IXGBE_WRITE_FLUSH(hw);
815
816 return 0;
817}
818
819/**
820 * ixgbe_led_off_generic - Turns off the software controllable LEDs.
821 * @hw: pointer to hardware structure
822 * @index: led number to turn off
823 **/
824s32 ixgbe_led_off_generic(struct ixgbe_hw *hw, u32 index)
825{
826 u32 led_reg = IXGBE_READ_REG(hw, IXGBE_LEDCTL);
827
828 if (index > 3)
829 return -EINVAL;
830
831 /* To turn off the LED, set mode to OFF. */
832 led_reg &= ~IXGBE_LED_MODE_MASK(index);
833 led_reg |= IXGBE_LED_OFF << IXGBE_LED_MODE_SHIFT(index);
834 IXGBE_WRITE_REG(hw, IXGBE_LEDCTL, led_reg);
835 IXGBE_WRITE_FLUSH(hw);
836
837 return 0;
838}
839
840/**
841 * ixgbe_init_eeprom_params_generic - Initialize EEPROM params
842 * @hw: pointer to hardware structure
843 *
844 * Initializes the EEPROM parameters ixgbe_eeprom_info within the
845 * ixgbe_hw struct in order to set up EEPROM access.
846 **/
847s32 ixgbe_init_eeprom_params_generic(struct ixgbe_hw *hw)
848{
849 struct ixgbe_eeprom_info *eeprom = &hw->eeprom;
850 u32 eec;
851 u16 eeprom_size;
852
853 if (eeprom->type == ixgbe_eeprom_uninitialized) {
854 eeprom->type = ixgbe_eeprom_none;
855 /* Set default semaphore delay to 10ms which is a well
856 * tested value */
857 eeprom->semaphore_delay = 10;
858 /* Clear EEPROM page size, it will be initialized as needed */
859 eeprom->word_page_size = 0;
860
861 /*
862 * Check for EEPROM present first.
863 * If not present leave as none
864 */
865 eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));
866 if (eec & IXGBE_EEC_PRES) {
867 eeprom->type = ixgbe_eeprom_spi;
868
869 /*
870 * SPI EEPROM is assumed here. This code would need to
871 * change if a future EEPROM is not SPI.
872 */
873 eeprom_size = FIELD_GET(IXGBE_EEC_SIZE, eec);
874 eeprom->word_size = BIT(eeprom_size +
875 IXGBE_EEPROM_WORD_SIZE_SHIFT);
876 }
877
878 if (eec & IXGBE_EEC_ADDR_SIZE)
879 eeprom->address_bits = 16;
880 else
881 eeprom->address_bits = 8;
882 hw_dbg(hw, "Eeprom params: type = %d, size = %d, address bits: %d\n",
883 eeprom->type, eeprom->word_size, eeprom->address_bits);
884 }
885
886 return 0;
887}
888
889/**
890 * ixgbe_write_eeprom_buffer_bit_bang_generic - Write EEPROM using bit-bang
891 * @hw: pointer to hardware structure
892 * @offset: offset within the EEPROM to write
893 * @words: number of words
894 * @data: 16 bit word(s) to write to EEPROM
895 *
896 * Reads 16 bit word(s) from EEPROM through bit-bang method
897 **/
898s32 ixgbe_write_eeprom_buffer_bit_bang_generic(struct ixgbe_hw *hw, u16 offset,
899 u16 words, u16 *data)
900{
901 s32 status;
902 u16 i, count;
903
904 hw->eeprom.ops.init_params(hw);
905
906 if (words == 0 || (offset + words > hw->eeprom.word_size))
907 return -EINVAL;
908
909 /*
910 * The EEPROM page size cannot be queried from the chip. We do lazy
911 * initialization. It is worth to do that when we write large buffer.
912 */
913 if ((hw->eeprom.word_page_size == 0) &&
914 (words > IXGBE_EEPROM_PAGE_SIZE_MAX))
915 ixgbe_detect_eeprom_page_size_generic(hw, offset);
916
917 /*
918 * We cannot hold synchronization semaphores for too long
919 * to avoid other entity starvation. However it is more efficient
920 * to read in bursts than synchronizing access for each word.
921 */
922 for (i = 0; i < words; i += IXGBE_EEPROM_RD_BUFFER_MAX_COUNT) {
923 count = (words - i) / IXGBE_EEPROM_RD_BUFFER_MAX_COUNT > 0 ?
924 IXGBE_EEPROM_RD_BUFFER_MAX_COUNT : (words - i);
925 status = ixgbe_write_eeprom_buffer_bit_bang(hw, offset + i,
926 count, &data[i]);
927
928 if (status != 0)
929 break;
930 }
931
932 return status;
933}
934
935/**
936 * ixgbe_write_eeprom_buffer_bit_bang - Writes 16 bit word(s) to EEPROM
937 * @hw: pointer to hardware structure
938 * @offset: offset within the EEPROM to be written to
939 * @words: number of word(s)
940 * @data: 16 bit word(s) to be written to the EEPROM
941 *
942 * If ixgbe_eeprom_update_checksum is not called after this function, the
943 * EEPROM will most likely contain an invalid checksum.
944 **/
945static s32 ixgbe_write_eeprom_buffer_bit_bang(struct ixgbe_hw *hw, u16 offset,
946 u16 words, u16 *data)
947{
948 s32 status;
949 u16 word;
950 u16 page_size;
951 u16 i;
952 u8 write_opcode = IXGBE_EEPROM_WRITE_OPCODE_SPI;
953
954 /* Prepare the EEPROM for writing */
955 status = ixgbe_acquire_eeprom(hw);
956 if (status)
957 return status;
958
959 if (ixgbe_ready_eeprom(hw) != 0) {
960 ixgbe_release_eeprom(hw);
961 return -EIO;
962 }
963
964 for (i = 0; i < words; i++) {
965 ixgbe_standby_eeprom(hw);
966
967 /* Send the WRITE ENABLE command (8 bit opcode) */
968 ixgbe_shift_out_eeprom_bits(hw,
969 IXGBE_EEPROM_WREN_OPCODE_SPI,
970 IXGBE_EEPROM_OPCODE_BITS);
971
972 ixgbe_standby_eeprom(hw);
973
974 /* Some SPI eeproms use the 8th address bit embedded
975 * in the opcode
976 */
977 if ((hw->eeprom.address_bits == 8) &&
978 ((offset + i) >= 128))
979 write_opcode |= IXGBE_EEPROM_A8_OPCODE_SPI;
980
981 /* Send the Write command (8-bit opcode + addr) */
982 ixgbe_shift_out_eeprom_bits(hw, write_opcode,
983 IXGBE_EEPROM_OPCODE_BITS);
984 ixgbe_shift_out_eeprom_bits(hw, (u16)((offset + i) * 2),
985 hw->eeprom.address_bits);
986
987 page_size = hw->eeprom.word_page_size;
988
989 /* Send the data in burst via SPI */
990 do {
991 word = data[i];
992 word = (word >> 8) | (word << 8);
993 ixgbe_shift_out_eeprom_bits(hw, word, 16);
994
995 if (page_size == 0)
996 break;
997
998 /* do not wrap around page */
999 if (((offset + i) & (page_size - 1)) ==
1000 (page_size - 1))
1001 break;
1002 } while (++i < words);
1003
1004 ixgbe_standby_eeprom(hw);
1005 usleep_range(10000, 20000);
1006 }
1007 /* Done with writing - release the EEPROM */
1008 ixgbe_release_eeprom(hw);
1009
1010 return 0;
1011}
1012
1013/**
1014 * ixgbe_write_eeprom_generic - Writes 16 bit value to EEPROM
1015 * @hw: pointer to hardware structure
1016 * @offset: offset within the EEPROM to be written to
1017 * @data: 16 bit word to be written to the EEPROM
1018 *
1019 * If ixgbe_eeprom_update_checksum is not called after this function, the
1020 * EEPROM will most likely contain an invalid checksum.
1021 **/
1022s32 ixgbe_write_eeprom_generic(struct ixgbe_hw *hw, u16 offset, u16 data)
1023{
1024 hw->eeprom.ops.init_params(hw);
1025
1026 if (offset >= hw->eeprom.word_size)
1027 return -EINVAL;
1028
1029 return ixgbe_write_eeprom_buffer_bit_bang(hw, offset, 1, &data);
1030}
1031
1032/**
1033 * ixgbe_read_eeprom_buffer_bit_bang_generic - Read EEPROM using bit-bang
1034 * @hw: pointer to hardware structure
1035 * @offset: offset within the EEPROM to be read
1036 * @words: number of word(s)
1037 * @data: read 16 bit words(s) from EEPROM
1038 *
1039 * Reads 16 bit word(s) from EEPROM through bit-bang method
1040 **/
1041s32 ixgbe_read_eeprom_buffer_bit_bang_generic(struct ixgbe_hw *hw, u16 offset,
1042 u16 words, u16 *data)
1043{
1044 s32 status;
1045 u16 i, count;
1046
1047 hw->eeprom.ops.init_params(hw);
1048
1049 if (words == 0 || (offset + words > hw->eeprom.word_size))
1050 return -EINVAL;
1051
1052 /*
1053 * We cannot hold synchronization semaphores for too long
1054 * to avoid other entity starvation. However it is more efficient
1055 * to read in bursts than synchronizing access for each word.
1056 */
1057 for (i = 0; i < words; i += IXGBE_EEPROM_RD_BUFFER_MAX_COUNT) {
1058 count = (words - i) / IXGBE_EEPROM_RD_BUFFER_MAX_COUNT > 0 ?
1059 IXGBE_EEPROM_RD_BUFFER_MAX_COUNT : (words - i);
1060
1061 status = ixgbe_read_eeprom_buffer_bit_bang(hw, offset + i,
1062 count, &data[i]);
1063
1064 if (status)
1065 return status;
1066 }
1067
1068 return 0;
1069}
1070
1071/**
1072 * ixgbe_read_eeprom_buffer_bit_bang - Read EEPROM using bit-bang
1073 * @hw: pointer to hardware structure
1074 * @offset: offset within the EEPROM to be read
1075 * @words: number of word(s)
1076 * @data: read 16 bit word(s) from EEPROM
1077 *
1078 * Reads 16 bit word(s) from EEPROM through bit-bang method
1079 **/
1080static s32 ixgbe_read_eeprom_buffer_bit_bang(struct ixgbe_hw *hw, u16 offset,
1081 u16 words, u16 *data)
1082{
1083 s32 status;
1084 u16 word_in;
1085 u8 read_opcode = IXGBE_EEPROM_READ_OPCODE_SPI;
1086 u16 i;
1087
1088 /* Prepare the EEPROM for reading */
1089 status = ixgbe_acquire_eeprom(hw);
1090 if (status)
1091 return status;
1092
1093 if (ixgbe_ready_eeprom(hw) != 0) {
1094 ixgbe_release_eeprom(hw);
1095 return -EIO;
1096 }
1097
1098 for (i = 0; i < words; i++) {
1099 ixgbe_standby_eeprom(hw);
1100 /* Some SPI eeproms use the 8th address bit embedded
1101 * in the opcode
1102 */
1103 if ((hw->eeprom.address_bits == 8) &&
1104 ((offset + i) >= 128))
1105 read_opcode |= IXGBE_EEPROM_A8_OPCODE_SPI;
1106
1107 /* Send the READ command (opcode + addr) */
1108 ixgbe_shift_out_eeprom_bits(hw, read_opcode,
1109 IXGBE_EEPROM_OPCODE_BITS);
1110 ixgbe_shift_out_eeprom_bits(hw, (u16)((offset + i) * 2),
1111 hw->eeprom.address_bits);
1112
1113 /* Read the data. */
1114 word_in = ixgbe_shift_in_eeprom_bits(hw, 16);
1115 data[i] = (word_in >> 8) | (word_in << 8);
1116 }
1117
1118 /* End this read operation */
1119 ixgbe_release_eeprom(hw);
1120
1121 return 0;
1122}
1123
1124/**
1125 * ixgbe_read_eeprom_bit_bang_generic - Read EEPROM word using bit-bang
1126 * @hw: pointer to hardware structure
1127 * @offset: offset within the EEPROM to be read
1128 * @data: read 16 bit value from EEPROM
1129 *
1130 * Reads 16 bit value from EEPROM through bit-bang method
1131 **/
1132s32 ixgbe_read_eeprom_bit_bang_generic(struct ixgbe_hw *hw, u16 offset,
1133 u16 *data)
1134{
1135 hw->eeprom.ops.init_params(hw);
1136
1137 if (offset >= hw->eeprom.word_size)
1138 return -EINVAL;
1139
1140 return ixgbe_read_eeprom_buffer_bit_bang(hw, offset, 1, data);
1141}
1142
1143/**
1144 * ixgbe_read_eerd_buffer_generic - Read EEPROM word(s) using EERD
1145 * @hw: pointer to hardware structure
1146 * @offset: offset of word in the EEPROM to read
1147 * @words: number of word(s)
1148 * @data: 16 bit word(s) from the EEPROM
1149 *
1150 * Reads a 16 bit word(s) from the EEPROM using the EERD register.
1151 **/
1152s32 ixgbe_read_eerd_buffer_generic(struct ixgbe_hw *hw, u16 offset,
1153 u16 words, u16 *data)
1154{
1155 u32 eerd;
1156 s32 status;
1157 u32 i;
1158
1159 hw->eeprom.ops.init_params(hw);
1160
1161 if (words == 0 || offset >= hw->eeprom.word_size)
1162 return -EINVAL;
1163
1164 for (i = 0; i < words; i++) {
1165 eerd = ((offset + i) << IXGBE_EEPROM_RW_ADDR_SHIFT) |
1166 IXGBE_EEPROM_RW_REG_START;
1167
1168 IXGBE_WRITE_REG(hw, IXGBE_EERD, eerd);
1169 status = ixgbe_poll_eerd_eewr_done(hw, IXGBE_NVM_POLL_READ);
1170
1171 if (status == 0) {
1172 data[i] = (IXGBE_READ_REG(hw, IXGBE_EERD) >>
1173 IXGBE_EEPROM_RW_REG_DATA);
1174 } else {
1175 hw_dbg(hw, "Eeprom read timed out\n");
1176 return status;
1177 }
1178 }
1179
1180 return 0;
1181}
1182
1183/**
1184 * ixgbe_detect_eeprom_page_size_generic - Detect EEPROM page size
1185 * @hw: pointer to hardware structure
1186 * @offset: offset within the EEPROM to be used as a scratch pad
1187 *
1188 * Discover EEPROM page size by writing marching data at given offset.
1189 * This function is called only when we are writing a new large buffer
1190 * at given offset so the data would be overwritten anyway.
1191 **/
1192static s32 ixgbe_detect_eeprom_page_size_generic(struct ixgbe_hw *hw,
1193 u16 offset)
1194{
1195 u16 data[IXGBE_EEPROM_PAGE_SIZE_MAX];
1196 s32 status;
1197 u16 i;
1198
1199 for (i = 0; i < IXGBE_EEPROM_PAGE_SIZE_MAX; i++)
1200 data[i] = i;
1201
1202 hw->eeprom.word_page_size = IXGBE_EEPROM_PAGE_SIZE_MAX;
1203 status = ixgbe_write_eeprom_buffer_bit_bang(hw, offset,
1204 IXGBE_EEPROM_PAGE_SIZE_MAX, data);
1205 hw->eeprom.word_page_size = 0;
1206 if (status)
1207 return status;
1208
1209 status = ixgbe_read_eeprom_buffer_bit_bang(hw, offset, 1, data);
1210 if (status)
1211 return status;
1212
1213 /*
1214 * When writing in burst more than the actual page size
1215 * EEPROM address wraps around current page.
1216 */
1217 hw->eeprom.word_page_size = IXGBE_EEPROM_PAGE_SIZE_MAX - data[0];
1218
1219 hw_dbg(hw, "Detected EEPROM page size = %d words.\n",
1220 hw->eeprom.word_page_size);
1221 return 0;
1222}
1223
1224/**
1225 * ixgbe_read_eerd_generic - Read EEPROM word using EERD
1226 * @hw: pointer to hardware structure
1227 * @offset: offset of word in the EEPROM to read
1228 * @data: word read from the EEPROM
1229 *
1230 * Reads a 16 bit word from the EEPROM using the EERD register.
1231 **/
1232s32 ixgbe_read_eerd_generic(struct ixgbe_hw *hw, u16 offset, u16 *data)
1233{
1234 return ixgbe_read_eerd_buffer_generic(hw, offset, 1, data);
1235}
1236
1237/**
1238 * ixgbe_write_eewr_buffer_generic - Write EEPROM word(s) using EEWR
1239 * @hw: pointer to hardware structure
1240 * @offset: offset of word in the EEPROM to write
1241 * @words: number of words
1242 * @data: word(s) write to the EEPROM
1243 *
1244 * Write a 16 bit word(s) to the EEPROM using the EEWR register.
1245 **/
1246s32 ixgbe_write_eewr_buffer_generic(struct ixgbe_hw *hw, u16 offset,
1247 u16 words, u16 *data)
1248{
1249 u32 eewr;
1250 s32 status;
1251 u16 i;
1252
1253 hw->eeprom.ops.init_params(hw);
1254
1255 if (words == 0 || offset >= hw->eeprom.word_size)
1256 return -EINVAL;
1257
1258 for (i = 0; i < words; i++) {
1259 eewr = ((offset + i) << IXGBE_EEPROM_RW_ADDR_SHIFT) |
1260 (data[i] << IXGBE_EEPROM_RW_REG_DATA) |
1261 IXGBE_EEPROM_RW_REG_START;
1262
1263 status = ixgbe_poll_eerd_eewr_done(hw, IXGBE_NVM_POLL_WRITE);
1264 if (status) {
1265 hw_dbg(hw, "Eeprom write EEWR timed out\n");
1266 return status;
1267 }
1268
1269 IXGBE_WRITE_REG(hw, IXGBE_EEWR, eewr);
1270
1271 status = ixgbe_poll_eerd_eewr_done(hw, IXGBE_NVM_POLL_WRITE);
1272 if (status) {
1273 hw_dbg(hw, "Eeprom write EEWR timed out\n");
1274 return status;
1275 }
1276 }
1277
1278 return 0;
1279}
1280
1281/**
1282 * ixgbe_write_eewr_generic - Write EEPROM word using EEWR
1283 * @hw: pointer to hardware structure
1284 * @offset: offset of word in the EEPROM to write
1285 * @data: word write to the EEPROM
1286 *
1287 * Write a 16 bit word to the EEPROM using the EEWR register.
1288 **/
1289s32 ixgbe_write_eewr_generic(struct ixgbe_hw *hw, u16 offset, u16 data)
1290{
1291 return ixgbe_write_eewr_buffer_generic(hw, offset, 1, &data);
1292}
1293
1294/**
1295 * ixgbe_poll_eerd_eewr_done - Poll EERD read or EEWR write status
1296 * @hw: pointer to hardware structure
1297 * @ee_reg: EEPROM flag for polling
1298 *
1299 * Polls the status bit (bit 1) of the EERD or EEWR to determine when the
1300 * read or write is done respectively.
1301 **/
1302static s32 ixgbe_poll_eerd_eewr_done(struct ixgbe_hw *hw, u32 ee_reg)
1303{
1304 u32 i;
1305 u32 reg;
1306
1307 for (i = 0; i < IXGBE_EERD_EEWR_ATTEMPTS; i++) {
1308 if (ee_reg == IXGBE_NVM_POLL_READ)
1309 reg = IXGBE_READ_REG(hw, IXGBE_EERD);
1310 else
1311 reg = IXGBE_READ_REG(hw, IXGBE_EEWR);
1312
1313 if (reg & IXGBE_EEPROM_RW_REG_DONE) {
1314 return 0;
1315 }
1316 udelay(5);
1317 }
1318 return -EIO;
1319}
1320
1321/**
1322 * ixgbe_acquire_eeprom - Acquire EEPROM using bit-bang
1323 * @hw: pointer to hardware structure
1324 *
1325 * Prepares EEPROM for access using bit-bang method. This function should
1326 * be called before issuing a command to the EEPROM.
1327 **/
1328static s32 ixgbe_acquire_eeprom(struct ixgbe_hw *hw)
1329{
1330 u32 eec;
1331 u32 i;
1332
1333 if (hw->mac.ops.acquire_swfw_sync(hw, IXGBE_GSSR_EEP_SM) != 0)
1334 return -EBUSY;
1335
1336 eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));
1337
1338 /* Request EEPROM Access */
1339 eec |= IXGBE_EEC_REQ;
1340 IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), eec);
1341
1342 for (i = 0; i < IXGBE_EEPROM_GRANT_ATTEMPTS; i++) {
1343 eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));
1344 if (eec & IXGBE_EEC_GNT)
1345 break;
1346 udelay(5);
1347 }
1348
1349 /* Release if grant not acquired */
1350 if (!(eec & IXGBE_EEC_GNT)) {
1351 eec &= ~IXGBE_EEC_REQ;
1352 IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), eec);
1353 hw_dbg(hw, "Could not acquire EEPROM grant\n");
1354
1355 hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_EEP_SM);
1356 return -EIO;
1357 }
1358
1359 /* Setup EEPROM for Read/Write */
1360 /* Clear CS and SK */
1361 eec &= ~(IXGBE_EEC_CS | IXGBE_EEC_SK);
1362 IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), eec);
1363 IXGBE_WRITE_FLUSH(hw);
1364 udelay(1);
1365 return 0;
1366}
1367
1368/**
1369 * ixgbe_get_eeprom_semaphore - Get hardware semaphore
1370 * @hw: pointer to hardware structure
1371 *
1372 * Sets the hardware semaphores so EEPROM access can occur for bit-bang method
1373 **/
1374static s32 ixgbe_get_eeprom_semaphore(struct ixgbe_hw *hw)
1375{
1376 u32 timeout = 2000;
1377 u32 i;
1378 u32 swsm;
1379
1380 /* Get SMBI software semaphore between device drivers first */
1381 for (i = 0; i < timeout; i++) {
1382 /*
1383 * If the SMBI bit is 0 when we read it, then the bit will be
1384 * set and we have the semaphore
1385 */
1386 swsm = IXGBE_READ_REG(hw, IXGBE_SWSM(hw));
1387 if (!(swsm & IXGBE_SWSM_SMBI))
1388 break;
1389 usleep_range(50, 100);
1390 }
1391
1392 if (i == timeout) {
1393 hw_dbg(hw, "Driver can't access the Eeprom - SMBI Semaphore not granted.\n");
1394 /* this release is particularly important because our attempts
1395 * above to get the semaphore may have succeeded, and if there
1396 * was a timeout, we should unconditionally clear the semaphore
1397 * bits to free the driver to make progress
1398 */
1399 ixgbe_release_eeprom_semaphore(hw);
1400
1401 usleep_range(50, 100);
1402 /* one last try
1403 * If the SMBI bit is 0 when we read it, then the bit will be
1404 * set and we have the semaphore
1405 */
1406 swsm = IXGBE_READ_REG(hw, IXGBE_SWSM(hw));
1407 if (swsm & IXGBE_SWSM_SMBI) {
1408 hw_dbg(hw, "Software semaphore SMBI between device drivers not granted.\n");
1409 return -EIO;
1410 }
1411 }
1412
1413 /* Now get the semaphore between SW/FW through the SWESMBI bit */
1414 for (i = 0; i < timeout; i++) {
1415 swsm = IXGBE_READ_REG(hw, IXGBE_SWSM(hw));
1416
1417 /* Set the SW EEPROM semaphore bit to request access */
1418 swsm |= IXGBE_SWSM_SWESMBI;
1419 IXGBE_WRITE_REG(hw, IXGBE_SWSM(hw), swsm);
1420
1421 /* If we set the bit successfully then we got the
1422 * semaphore.
1423 */
1424 swsm = IXGBE_READ_REG(hw, IXGBE_SWSM(hw));
1425 if (swsm & IXGBE_SWSM_SWESMBI)
1426 break;
1427
1428 usleep_range(50, 100);
1429 }
1430
1431 /* Release semaphores and return error if SW EEPROM semaphore
1432 * was not granted because we don't have access to the EEPROM
1433 */
1434 if (i >= timeout) {
1435 hw_dbg(hw, "SWESMBI Software EEPROM semaphore not granted.\n");
1436 ixgbe_release_eeprom_semaphore(hw);
1437 return -EIO;
1438 }
1439
1440 return 0;
1441}
1442
1443/**
1444 * ixgbe_release_eeprom_semaphore - Release hardware semaphore
1445 * @hw: pointer to hardware structure
1446 *
1447 * This function clears hardware semaphore bits.
1448 **/
1449static void ixgbe_release_eeprom_semaphore(struct ixgbe_hw *hw)
1450{
1451 u32 swsm;
1452
1453 swsm = IXGBE_READ_REG(hw, IXGBE_SWSM(hw));
1454
1455 /* Release both semaphores by writing 0 to the bits SWESMBI and SMBI */
1456 swsm &= ~(IXGBE_SWSM_SWESMBI | IXGBE_SWSM_SMBI);
1457 IXGBE_WRITE_REG(hw, IXGBE_SWSM(hw), swsm);
1458 IXGBE_WRITE_FLUSH(hw);
1459}
1460
1461/**
1462 * ixgbe_ready_eeprom - Polls for EEPROM ready
1463 * @hw: pointer to hardware structure
1464 **/
1465static s32 ixgbe_ready_eeprom(struct ixgbe_hw *hw)
1466{
1467 u16 i;
1468 u8 spi_stat_reg;
1469
1470 /*
1471 * Read "Status Register" repeatedly until the LSB is cleared. The
1472 * EEPROM will signal that the command has been completed by clearing
1473 * bit 0 of the internal status register. If it's not cleared within
1474 * 5 milliseconds, then error out.
1475 */
1476 for (i = 0; i < IXGBE_EEPROM_MAX_RETRY_SPI; i += 5) {
1477 ixgbe_shift_out_eeprom_bits(hw, IXGBE_EEPROM_RDSR_OPCODE_SPI,
1478 IXGBE_EEPROM_OPCODE_BITS);
1479 spi_stat_reg = (u8)ixgbe_shift_in_eeprom_bits(hw, 8);
1480 if (!(spi_stat_reg & IXGBE_EEPROM_STATUS_RDY_SPI))
1481 break;
1482
1483 udelay(5);
1484 ixgbe_standby_eeprom(hw);
1485 }
1486
1487 /*
1488 * On some parts, SPI write time could vary from 0-20mSec on 3.3V
1489 * devices (and only 0-5mSec on 5V devices)
1490 */
1491 if (i >= IXGBE_EEPROM_MAX_RETRY_SPI) {
1492 hw_dbg(hw, "SPI EEPROM Status error\n");
1493 return -EIO;
1494 }
1495
1496 return 0;
1497}
1498
1499/**
1500 * ixgbe_standby_eeprom - Returns EEPROM to a "standby" state
1501 * @hw: pointer to hardware structure
1502 **/
1503static void ixgbe_standby_eeprom(struct ixgbe_hw *hw)
1504{
1505 u32 eec;
1506
1507 eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));
1508
1509 /* Toggle CS to flush commands */
1510 eec |= IXGBE_EEC_CS;
1511 IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), eec);
1512 IXGBE_WRITE_FLUSH(hw);
1513 udelay(1);
1514 eec &= ~IXGBE_EEC_CS;
1515 IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), eec);
1516 IXGBE_WRITE_FLUSH(hw);
1517 udelay(1);
1518}
1519
1520/**
1521 * ixgbe_shift_out_eeprom_bits - Shift data bits out to the EEPROM.
1522 * @hw: pointer to hardware structure
1523 * @data: data to send to the EEPROM
1524 * @count: number of bits to shift out
1525 **/
1526static void ixgbe_shift_out_eeprom_bits(struct ixgbe_hw *hw, u16 data,
1527 u16 count)
1528{
1529 u32 eec;
1530 u32 mask;
1531 u32 i;
1532
1533 eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));
1534
1535 /*
1536 * Mask is used to shift "count" bits of "data" out to the EEPROM
1537 * one bit at a time. Determine the starting bit based on count
1538 */
1539 mask = BIT(count - 1);
1540
1541 for (i = 0; i < count; i++) {
1542 /*
1543 * A "1" is shifted out to the EEPROM by setting bit "DI" to a
1544 * "1", and then raising and then lowering the clock (the SK
1545 * bit controls the clock input to the EEPROM). A "0" is
1546 * shifted out to the EEPROM by setting "DI" to "0" and then
1547 * raising and then lowering the clock.
1548 */
1549 if (data & mask)
1550 eec |= IXGBE_EEC_DI;
1551 else
1552 eec &= ~IXGBE_EEC_DI;
1553
1554 IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), eec);
1555 IXGBE_WRITE_FLUSH(hw);
1556
1557 udelay(1);
1558
1559 ixgbe_raise_eeprom_clk(hw, &eec);
1560 ixgbe_lower_eeprom_clk(hw, &eec);
1561
1562 /*
1563 * Shift mask to signify next bit of data to shift in to the
1564 * EEPROM
1565 */
1566 mask = mask >> 1;
1567 }
1568
1569 /* We leave the "DI" bit set to "0" when we leave this routine. */
1570 eec &= ~IXGBE_EEC_DI;
1571 IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), eec);
1572 IXGBE_WRITE_FLUSH(hw);
1573}
1574
1575/**
1576 * ixgbe_shift_in_eeprom_bits - Shift data bits in from the EEPROM
1577 * @hw: pointer to hardware structure
1578 * @count: number of bits to shift
1579 **/
1580static u16 ixgbe_shift_in_eeprom_bits(struct ixgbe_hw *hw, u16 count)
1581{
1582 u32 eec;
1583 u32 i;
1584 u16 data = 0;
1585
1586 /*
1587 * In order to read a register from the EEPROM, we need to shift
1588 * 'count' bits in from the EEPROM. Bits are "shifted in" by raising
1589 * the clock input to the EEPROM (setting the SK bit), and then reading
1590 * the value of the "DO" bit. During this "shifting in" process the
1591 * "DI" bit should always be clear.
1592 */
1593 eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));
1594
1595 eec &= ~(IXGBE_EEC_DO | IXGBE_EEC_DI);
1596
1597 for (i = 0; i < count; i++) {
1598 data = data << 1;
1599 ixgbe_raise_eeprom_clk(hw, &eec);
1600
1601 eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));
1602
1603 eec &= ~(IXGBE_EEC_DI);
1604 if (eec & IXGBE_EEC_DO)
1605 data |= 1;
1606
1607 ixgbe_lower_eeprom_clk(hw, &eec);
1608 }
1609
1610 return data;
1611}
1612
1613/**
1614 * ixgbe_raise_eeprom_clk - Raises the EEPROM's clock input.
1615 * @hw: pointer to hardware structure
1616 * @eec: EEC register's current value
1617 **/
1618static void ixgbe_raise_eeprom_clk(struct ixgbe_hw *hw, u32 *eec)
1619{
1620 /*
1621 * Raise the clock input to the EEPROM
1622 * (setting the SK bit), then delay
1623 */
1624 *eec = *eec | IXGBE_EEC_SK;
1625 IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), *eec);
1626 IXGBE_WRITE_FLUSH(hw);
1627 udelay(1);
1628}
1629
1630/**
1631 * ixgbe_lower_eeprom_clk - Lowers the EEPROM's clock input.
1632 * @hw: pointer to hardware structure
1633 * @eec: EEC's current value
1634 **/
1635static void ixgbe_lower_eeprom_clk(struct ixgbe_hw *hw, u32 *eec)
1636{
1637 /*
1638 * Lower the clock input to the EEPROM (clearing the SK bit), then
1639 * delay
1640 */
1641 *eec = *eec & ~IXGBE_EEC_SK;
1642 IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), *eec);
1643 IXGBE_WRITE_FLUSH(hw);
1644 udelay(1);
1645}
1646
1647/**
1648 * ixgbe_release_eeprom - Release EEPROM, release semaphores
1649 * @hw: pointer to hardware structure
1650 **/
1651static void ixgbe_release_eeprom(struct ixgbe_hw *hw)
1652{
1653 u32 eec;
1654
1655 eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));
1656
1657 eec |= IXGBE_EEC_CS; /* Pull CS high */
1658 eec &= ~IXGBE_EEC_SK; /* Lower SCK */
1659
1660 IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), eec);
1661 IXGBE_WRITE_FLUSH(hw);
1662
1663 udelay(1);
1664
1665 /* Stop requesting EEPROM access */
1666 eec &= ~IXGBE_EEC_REQ;
1667 IXGBE_WRITE_REG(hw, IXGBE_EEC(hw), eec);
1668
1669 hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_EEP_SM);
1670
1671 /*
1672 * Delay before attempt to obtain semaphore again to allow FW
1673 * access. semaphore_delay is in ms we need us for usleep_range
1674 */
1675 usleep_range(hw->eeprom.semaphore_delay * 1000,
1676 hw->eeprom.semaphore_delay * 2000);
1677}
1678
1679/**
1680 * ixgbe_calc_eeprom_checksum_generic - Calculates and returns the checksum
1681 * @hw: pointer to hardware structure
1682 **/
1683s32 ixgbe_calc_eeprom_checksum_generic(struct ixgbe_hw *hw)
1684{
1685 u16 i;
1686 u16 j;
1687 u16 checksum = 0;
1688 u16 length = 0;
1689 u16 pointer = 0;
1690 u16 word = 0;
1691
1692 /* Include 0x0-0x3F in the checksum */
1693 for (i = 0; i < IXGBE_EEPROM_CHECKSUM; i++) {
1694 if (hw->eeprom.ops.read(hw, i, &word)) {
1695 hw_dbg(hw, "EEPROM read failed\n");
1696 break;
1697 }
1698 checksum += word;
1699 }
1700
1701 /* Include all data from pointers except for the fw pointer */
1702 for (i = IXGBE_PCIE_ANALOG_PTR; i < IXGBE_FW_PTR; i++) {
1703 if (hw->eeprom.ops.read(hw, i, &pointer)) {
1704 hw_dbg(hw, "EEPROM read failed\n");
1705 return -EIO;
1706 }
1707
1708 /* If the pointer seems invalid */
1709 if (pointer == 0xFFFF || pointer == 0)
1710 continue;
1711
1712 if (hw->eeprom.ops.read(hw, pointer, &length)) {
1713 hw_dbg(hw, "EEPROM read failed\n");
1714 return -EIO;
1715 }
1716
1717 if (length == 0xFFFF || length == 0)
1718 continue;
1719
1720 for (j = pointer + 1; j <= pointer + length; j++) {
1721 if (hw->eeprom.ops.read(hw, j, &word)) {
1722 hw_dbg(hw, "EEPROM read failed\n");
1723 return -EIO;
1724 }
1725 checksum += word;
1726 }
1727 }
1728
1729 checksum = (u16)IXGBE_EEPROM_SUM - checksum;
1730
1731 return (s32)checksum;
1732}
1733
1734/**
1735 * ixgbe_validate_eeprom_checksum_generic - Validate EEPROM checksum
1736 * @hw: pointer to hardware structure
1737 * @checksum_val: calculated checksum
1738 *
1739 * Performs checksum calculation and validates the EEPROM checksum. If the
1740 * caller does not need checksum_val, the value can be NULL.
1741 **/
1742s32 ixgbe_validate_eeprom_checksum_generic(struct ixgbe_hw *hw,
1743 u16 *checksum_val)
1744{
1745 s32 status;
1746 u16 checksum;
1747 u16 read_checksum = 0;
1748
1749 /*
1750 * Read the first word from the EEPROM. If this times out or fails, do
1751 * not continue or we could be in for a very long wait while every
1752 * EEPROM read fails
1753 */
1754 status = hw->eeprom.ops.read(hw, 0, &checksum);
1755 if (status) {
1756 hw_dbg(hw, "EEPROM read failed\n");
1757 return status;
1758 }
1759
1760 status = hw->eeprom.ops.calc_checksum(hw);
1761 if (status < 0)
1762 return status;
1763
1764 checksum = (u16)(status & 0xffff);
1765
1766 status = hw->eeprom.ops.read(hw, IXGBE_EEPROM_CHECKSUM, &read_checksum);
1767 if (status) {
1768 hw_dbg(hw, "EEPROM read failed\n");
1769 return status;
1770 }
1771
1772 /* Verify read checksum from EEPROM is the same as
1773 * calculated checksum
1774 */
1775 if (read_checksum != checksum)
1776 status = -EIO;
1777
1778 /* If the user cares, return the calculated checksum */
1779 if (checksum_val)
1780 *checksum_val = checksum;
1781
1782 return status;
1783}
1784
1785/**
1786 * ixgbe_update_eeprom_checksum_generic - Updates the EEPROM checksum
1787 * @hw: pointer to hardware structure
1788 **/
1789s32 ixgbe_update_eeprom_checksum_generic(struct ixgbe_hw *hw)
1790{
1791 s32 status;
1792 u16 checksum;
1793
1794 /*
1795 * Read the first word from the EEPROM. If this times out or fails, do
1796 * not continue or we could be in for a very long wait while every
1797 * EEPROM read fails
1798 */
1799 status = hw->eeprom.ops.read(hw, 0, &checksum);
1800 if (status) {
1801 hw_dbg(hw, "EEPROM read failed\n");
1802 return status;
1803 }
1804
1805 status = hw->eeprom.ops.calc_checksum(hw);
1806 if (status < 0)
1807 return status;
1808
1809 checksum = (u16)(status & 0xffff);
1810
1811 status = hw->eeprom.ops.write(hw, IXGBE_EEPROM_CHECKSUM, checksum);
1812
1813 return status;
1814}
1815
1816/**
1817 * ixgbe_set_rar_generic - Set Rx address register
1818 * @hw: pointer to hardware structure
1819 * @index: Receive address register to write
1820 * @addr: Address to put into receive address register
1821 * @vmdq: VMDq "set" or "pool" index
1822 * @enable_addr: set flag that address is active
1823 *
1824 * Puts an ethernet address into a receive address register.
1825 **/
1826s32 ixgbe_set_rar_generic(struct ixgbe_hw *hw, u32 index, u8 *addr, u32 vmdq,
1827 u32 enable_addr)
1828{
1829 u32 rar_low, rar_high;
1830 u32 rar_entries = hw->mac.num_rar_entries;
1831
1832 /* Make sure we are using a valid rar index range */
1833 if (index >= rar_entries) {
1834 hw_dbg(hw, "RAR index %d is out of range.\n", index);
1835 return -EINVAL;
1836 }
1837
1838 /* setup VMDq pool selection before this RAR gets enabled */
1839 hw->mac.ops.set_vmdq(hw, index, vmdq);
1840
1841 /*
1842 * HW expects these in little endian so we reverse the byte
1843 * order from network order (big endian) to little endian
1844 */
1845 rar_low = ((u32)addr[0] |
1846 ((u32)addr[1] << 8) |
1847 ((u32)addr[2] << 16) |
1848 ((u32)addr[3] << 24));
1849 /*
1850 * Some parts put the VMDq setting in the extra RAH bits,
1851 * so save everything except the lower 16 bits that hold part
1852 * of the address and the address valid bit.
1853 */
1854 rar_high = IXGBE_READ_REG(hw, IXGBE_RAH(index));
1855 rar_high &= ~(0x0000FFFF | IXGBE_RAH_AV);
1856 rar_high |= ((u32)addr[4] | ((u32)addr[5] << 8));
1857
1858 if (enable_addr != 0)
1859 rar_high |= IXGBE_RAH_AV;
1860
1861 /* Record lower 32 bits of MAC address and then make
1862 * sure that write is flushed to hardware before writing
1863 * the upper 16 bits and setting the valid bit.
1864 */
1865 IXGBE_WRITE_REG(hw, IXGBE_RAL(index), rar_low);
1866 IXGBE_WRITE_FLUSH(hw);
1867 IXGBE_WRITE_REG(hw, IXGBE_RAH(index), rar_high);
1868
1869 return 0;
1870}
1871
1872/**
1873 * ixgbe_clear_rar_generic - Remove Rx address register
1874 * @hw: pointer to hardware structure
1875 * @index: Receive address register to write
1876 *
1877 * Clears an ethernet address from a receive address register.
1878 **/
1879s32 ixgbe_clear_rar_generic(struct ixgbe_hw *hw, u32 index)
1880{
1881 u32 rar_high;
1882 u32 rar_entries = hw->mac.num_rar_entries;
1883
1884 /* Make sure we are using a valid rar index range */
1885 if (index >= rar_entries) {
1886 hw_dbg(hw, "RAR index %d is out of range.\n", index);
1887 return -EINVAL;
1888 }
1889
1890 /*
1891 * Some parts put the VMDq setting in the extra RAH bits,
1892 * so save everything except the lower 16 bits that hold part
1893 * of the address and the address valid bit.
1894 */
1895 rar_high = IXGBE_READ_REG(hw, IXGBE_RAH(index));
1896 rar_high &= ~(0x0000FFFF | IXGBE_RAH_AV);
1897
1898 /* Clear the address valid bit and upper 16 bits of the address
1899 * before clearing the lower bits. This way we aren't updating
1900 * a live filter.
1901 */
1902 IXGBE_WRITE_REG(hw, IXGBE_RAH(index), rar_high);
1903 IXGBE_WRITE_FLUSH(hw);
1904 IXGBE_WRITE_REG(hw, IXGBE_RAL(index), 0);
1905
1906 /* clear VMDq pool/queue selection for this RAR */
1907 hw->mac.ops.clear_vmdq(hw, index, IXGBE_CLEAR_VMDQ_ALL);
1908
1909 return 0;
1910}
1911
1912/**
1913 * ixgbe_init_rx_addrs_generic - Initializes receive address filters.
1914 * @hw: pointer to hardware structure
1915 *
1916 * Places the MAC address in receive address register 0 and clears the rest
1917 * of the receive address registers. Clears the multicast table. Assumes
1918 * the receiver is in reset when the routine is called.
1919 **/
1920s32 ixgbe_init_rx_addrs_generic(struct ixgbe_hw *hw)
1921{
1922 u32 i;
1923 u32 rar_entries = hw->mac.num_rar_entries;
1924
1925 /*
1926 * If the current mac address is valid, assume it is a software override
1927 * to the permanent address.
1928 * Otherwise, use the permanent address from the eeprom.
1929 */
1930 if (!is_valid_ether_addr(hw->mac.addr)) {
1931 /* Get the MAC address from the RAR0 for later reference */
1932 hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
1933
1934 hw_dbg(hw, " Keeping Current RAR0 Addr =%pM\n", hw->mac.addr);
1935 } else {
1936 /* Setup the receive address. */
1937 hw_dbg(hw, "Overriding MAC Address in RAR[0]\n");
1938 hw_dbg(hw, " New MAC Addr =%pM\n", hw->mac.addr);
1939
1940 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
1941 }
1942
1943 /* clear VMDq pool/queue selection for RAR 0 */
1944 hw->mac.ops.clear_vmdq(hw, 0, IXGBE_CLEAR_VMDQ_ALL);
1945
1946 hw->addr_ctrl.overflow_promisc = 0;
1947
1948 hw->addr_ctrl.rar_used_count = 1;
1949
1950 /* Zero out the other receive addresses. */
1951 hw_dbg(hw, "Clearing RAR[1-%d]\n", rar_entries - 1);
1952 for (i = 1; i < rar_entries; i++) {
1953 IXGBE_WRITE_REG(hw, IXGBE_RAL(i), 0);
1954 IXGBE_WRITE_REG(hw, IXGBE_RAH(i), 0);
1955 }
1956
1957 /* Clear the MTA */
1958 hw->addr_ctrl.mta_in_use = 0;
1959 IXGBE_WRITE_REG(hw, IXGBE_MCSTCTRL, hw->mac.mc_filter_type);
1960
1961 hw_dbg(hw, " Clearing MTA\n");
1962 for (i = 0; i < hw->mac.mcft_size; i++)
1963 IXGBE_WRITE_REG(hw, IXGBE_MTA(i), 0);
1964
1965 if (hw->mac.ops.init_uta_tables)
1966 hw->mac.ops.init_uta_tables(hw);
1967
1968 return 0;
1969}
1970
1971/**
1972 * ixgbe_mta_vector - Determines bit-vector in multicast table to set
1973 * @hw: pointer to hardware structure
1974 * @mc_addr: the multicast address
1975 *
1976 * Extracts the 12 bits, from a multicast address, to determine which
1977 * bit-vector to set in the multicast table. The hardware uses 12 bits, from
1978 * incoming rx multicast addresses, to determine the bit-vector to check in
1979 * the MTA. Which of the 4 combination, of 12-bits, the hardware uses is set
1980 * by the MO field of the MCSTCTRL. The MO field is set during initialization
1981 * to mc_filter_type.
1982 **/
1983static s32 ixgbe_mta_vector(struct ixgbe_hw *hw, u8 *mc_addr)
1984{
1985 u32 vector = 0;
1986
1987 switch (hw->mac.mc_filter_type) {
1988 case 0: /* use bits [47:36] of the address */
1989 vector = ((mc_addr[4] >> 4) | (((u16)mc_addr[5]) << 4));
1990 break;
1991 case 1: /* use bits [46:35] of the address */
1992 vector = ((mc_addr[4] >> 3) | (((u16)mc_addr[5]) << 5));
1993 break;
1994 case 2: /* use bits [45:34] of the address */
1995 vector = ((mc_addr[4] >> 2) | (((u16)mc_addr[5]) << 6));
1996 break;
1997 case 3: /* use bits [43:32] of the address */
1998 vector = ((mc_addr[4]) | (((u16)mc_addr[5]) << 8));
1999 break;
2000 default: /* Invalid mc_filter_type */
2001 hw_dbg(hw, "MC filter type param set incorrectly\n");
2002 break;
2003 }
2004
2005 /* vector can only be 12-bits or boundary will be exceeded */
2006 vector &= 0xFFF;
2007 return vector;
2008}
2009
2010/**
2011 * ixgbe_set_mta - Set bit-vector in multicast table
2012 * @hw: pointer to hardware structure
2013 * @mc_addr: Multicast address
2014 *
2015 * Sets the bit-vector in the multicast table.
2016 **/
2017static void ixgbe_set_mta(struct ixgbe_hw *hw, u8 *mc_addr)
2018{
2019 u32 vector;
2020 u32 vector_bit;
2021 u32 vector_reg;
2022
2023 hw->addr_ctrl.mta_in_use++;
2024
2025 vector = ixgbe_mta_vector(hw, mc_addr);
2026 hw_dbg(hw, " bit-vector = 0x%03X\n", vector);
2027
2028 /*
2029 * The MTA is a register array of 128 32-bit registers. It is treated
2030 * like an array of 4096 bits. We want to set bit
2031 * BitArray[vector_value]. So we figure out what register the bit is
2032 * in, read it, OR in the new bit, then write back the new value. The
2033 * register is determined by the upper 7 bits of the vector value and
2034 * the bit within that register are determined by the lower 5 bits of
2035 * the value.
2036 */
2037 vector_reg = (vector >> 5) & 0x7F;
2038 vector_bit = vector & 0x1F;
2039 hw->mac.mta_shadow[vector_reg] |= BIT(vector_bit);
2040}
2041
2042/**
2043 * ixgbe_update_mc_addr_list_generic - Updates MAC list of multicast addresses
2044 * @hw: pointer to hardware structure
2045 * @netdev: pointer to net device structure
2046 *
2047 * The given list replaces any existing list. Clears the MC addrs from receive
2048 * address registers and the multicast table. Uses unused receive address
2049 * registers for the first multicast addresses, and hashes the rest into the
2050 * multicast table.
2051 **/
2052s32 ixgbe_update_mc_addr_list_generic(struct ixgbe_hw *hw,
2053 struct net_device *netdev)
2054{
2055 struct netdev_hw_addr *ha;
2056 u32 i;
2057
2058 /*
2059 * Set the new number of MC addresses that we are being requested to
2060 * use.
2061 */
2062 hw->addr_ctrl.num_mc_addrs = netdev_mc_count(netdev);
2063 hw->addr_ctrl.mta_in_use = 0;
2064
2065 /* Clear mta_shadow */
2066 hw_dbg(hw, " Clearing MTA\n");
2067 memset(&hw->mac.mta_shadow, 0, sizeof(hw->mac.mta_shadow));
2068
2069 /* Update mta shadow */
2070 netdev_for_each_mc_addr(ha, netdev) {
2071 hw_dbg(hw, " Adding the multicast addresses:\n");
2072 ixgbe_set_mta(hw, ha->addr);
2073 }
2074
2075 /* Enable mta */
2076 for (i = 0; i < hw->mac.mcft_size; i++)
2077 IXGBE_WRITE_REG_ARRAY(hw, IXGBE_MTA(0), i,
2078 hw->mac.mta_shadow[i]);
2079
2080 if (hw->addr_ctrl.mta_in_use > 0)
2081 IXGBE_WRITE_REG(hw, IXGBE_MCSTCTRL,
2082 IXGBE_MCSTCTRL_MFE | hw->mac.mc_filter_type);
2083
2084 hw_dbg(hw, "ixgbe_update_mc_addr_list_generic Complete\n");
2085 return 0;
2086}
2087
2088/**
2089 * ixgbe_enable_mc_generic - Enable multicast address in RAR
2090 * @hw: pointer to hardware structure
2091 *
2092 * Enables multicast address in RAR and the use of the multicast hash table.
2093 **/
2094s32 ixgbe_enable_mc_generic(struct ixgbe_hw *hw)
2095{
2096 struct ixgbe_addr_filter_info *a = &hw->addr_ctrl;
2097
2098 if (a->mta_in_use > 0)
2099 IXGBE_WRITE_REG(hw, IXGBE_MCSTCTRL, IXGBE_MCSTCTRL_MFE |
2100 hw->mac.mc_filter_type);
2101
2102 return 0;
2103}
2104
2105/**
2106 * ixgbe_disable_mc_generic - Disable multicast address in RAR
2107 * @hw: pointer to hardware structure
2108 *
2109 * Disables multicast address in RAR and the use of the multicast hash table.
2110 **/
2111s32 ixgbe_disable_mc_generic(struct ixgbe_hw *hw)
2112{
2113 struct ixgbe_addr_filter_info *a = &hw->addr_ctrl;
2114
2115 if (a->mta_in_use > 0)
2116 IXGBE_WRITE_REG(hw, IXGBE_MCSTCTRL, hw->mac.mc_filter_type);
2117
2118 return 0;
2119}
2120
2121/**
2122 * ixgbe_fc_enable_generic - Enable flow control
2123 * @hw: pointer to hardware structure
2124 *
2125 * Enable flow control according to the current settings.
2126 **/
2127s32 ixgbe_fc_enable_generic(struct ixgbe_hw *hw)
2128{
2129 u32 mflcn_reg, fccfg_reg;
2130 u32 reg;
2131 u32 fcrtl, fcrth;
2132 int i;
2133
2134 /* Validate the water mark configuration. */
2135 if (!hw->fc.pause_time)
2136 return -EINVAL;
2137
2138 /* Low water mark of zero causes XOFF floods */
2139 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
2140 if ((hw->fc.current_mode & ixgbe_fc_tx_pause) &&
2141 hw->fc.high_water[i]) {
2142 if (!hw->fc.low_water[i] ||
2143 hw->fc.low_water[i] >= hw->fc.high_water[i]) {
2144 hw_dbg(hw, "Invalid water mark configuration\n");
2145 return -EINVAL;
2146 }
2147 }
2148 }
2149
2150 /* Negotiate the fc mode to use */
2151 hw->mac.ops.fc_autoneg(hw);
2152
2153 /* Disable any previous flow control settings */
2154 mflcn_reg = IXGBE_READ_REG(hw, IXGBE_MFLCN);
2155 mflcn_reg &= ~(IXGBE_MFLCN_RPFCE_MASK | IXGBE_MFLCN_RFCE);
2156
2157 fccfg_reg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
2158 fccfg_reg &= ~(IXGBE_FCCFG_TFCE_802_3X | IXGBE_FCCFG_TFCE_PRIORITY);
2159
2160 /*
2161 * The possible values of fc.current_mode are:
2162 * 0: Flow control is completely disabled
2163 * 1: Rx flow control is enabled (we can receive pause frames,
2164 * but not send pause frames).
2165 * 2: Tx flow control is enabled (we can send pause frames but
2166 * we do not support receiving pause frames).
2167 * 3: Both Rx and Tx flow control (symmetric) are enabled.
2168 * other: Invalid.
2169 */
2170 switch (hw->fc.current_mode) {
2171 case ixgbe_fc_none:
2172 /*
2173 * Flow control is disabled by software override or autoneg.
2174 * The code below will actually disable it in the HW.
2175 */
2176 break;
2177 case ixgbe_fc_rx_pause:
2178 /*
2179 * Rx Flow control is enabled and Tx Flow control is
2180 * disabled by software override. Since there really
2181 * isn't a way to advertise that we are capable of RX
2182 * Pause ONLY, we will advertise that we support both
2183 * symmetric and asymmetric Rx PAUSE. Later, we will
2184 * disable the adapter's ability to send PAUSE frames.
2185 */
2186 mflcn_reg |= IXGBE_MFLCN_RFCE;
2187 break;
2188 case ixgbe_fc_tx_pause:
2189 /*
2190 * Tx Flow control is enabled, and Rx Flow control is
2191 * disabled by software override.
2192 */
2193 fccfg_reg |= IXGBE_FCCFG_TFCE_802_3X;
2194 break;
2195 case ixgbe_fc_full:
2196 /* Flow control (both Rx and Tx) is enabled by SW override. */
2197 mflcn_reg |= IXGBE_MFLCN_RFCE;
2198 fccfg_reg |= IXGBE_FCCFG_TFCE_802_3X;
2199 break;
2200 default:
2201 hw_dbg(hw, "Flow control param set incorrectly\n");
2202 return -EIO;
2203 }
2204
2205 /* Set 802.3x based flow control settings. */
2206 mflcn_reg |= IXGBE_MFLCN_DPF;
2207 IXGBE_WRITE_REG(hw, IXGBE_MFLCN, mflcn_reg);
2208 IXGBE_WRITE_REG(hw, IXGBE_FCCFG, fccfg_reg);
2209
2210 /* Set up and enable Rx high/low water mark thresholds, enable XON. */
2211 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
2212 if ((hw->fc.current_mode & ixgbe_fc_tx_pause) &&
2213 hw->fc.high_water[i]) {
2214 fcrtl = (hw->fc.low_water[i] << 10) | IXGBE_FCRTL_XONE;
2215 IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), fcrtl);
2216 fcrth = (hw->fc.high_water[i] << 10) | IXGBE_FCRTH_FCEN;
2217 } else {
2218 IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), 0);
2219 /*
2220 * In order to prevent Tx hangs when the internal Tx
2221 * switch is enabled we must set the high water mark
2222 * to the Rx packet buffer size - 24KB. This allows
2223 * the Tx switch to function even under heavy Rx
2224 * workloads.
2225 */
2226 fcrth = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(i)) - 24576;
2227 }
2228
2229 IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), fcrth);
2230 }
2231
2232 /* Configure pause time (2 TCs per register) */
2233 reg = hw->fc.pause_time * 0x00010001U;
2234 for (i = 0; i < (MAX_TRAFFIC_CLASS / 2); i++)
2235 IXGBE_WRITE_REG(hw, IXGBE_FCTTV(i), reg);
2236
2237 IXGBE_WRITE_REG(hw, IXGBE_FCRTV, hw->fc.pause_time / 2);
2238
2239 return 0;
2240}
2241
2242/**
2243 * ixgbe_negotiate_fc - Negotiate flow control
2244 * @hw: pointer to hardware structure
2245 * @adv_reg: flow control advertised settings
2246 * @lp_reg: link partner's flow control settings
2247 * @adv_sym: symmetric pause bit in advertisement
2248 * @adv_asm: asymmetric pause bit in advertisement
2249 * @lp_sym: symmetric pause bit in link partner advertisement
2250 * @lp_asm: asymmetric pause bit in link partner advertisement
2251 *
2252 * Find the intersection between advertised settings and link partner's
2253 * advertised settings
2254 **/
2255s32 ixgbe_negotiate_fc(struct ixgbe_hw *hw, u32 adv_reg, u32 lp_reg,
2256 u32 adv_sym, u32 adv_asm, u32 lp_sym, u32 lp_asm)
2257{
2258 if ((!(adv_reg)) || (!(lp_reg)))
2259 return -EINVAL;
2260
2261 if ((adv_reg & adv_sym) && (lp_reg & lp_sym)) {
2262 /*
2263 * Now we need to check if the user selected Rx ONLY
2264 * of pause frames. In this case, we had to advertise
2265 * FULL flow control because we could not advertise RX
2266 * ONLY. Hence, we must now check to see if we need to
2267 * turn OFF the TRANSMISSION of PAUSE frames.
2268 */
2269 if (hw->fc.requested_mode == ixgbe_fc_full) {
2270 hw->fc.current_mode = ixgbe_fc_full;
2271 hw_dbg(hw, "Flow Control = FULL.\n");
2272 } else {
2273 hw->fc.current_mode = ixgbe_fc_rx_pause;
2274 hw_dbg(hw, "Flow Control=RX PAUSE frames only\n");
2275 }
2276 } else if (!(adv_reg & adv_sym) && (adv_reg & adv_asm) &&
2277 (lp_reg & lp_sym) && (lp_reg & lp_asm)) {
2278 hw->fc.current_mode = ixgbe_fc_tx_pause;
2279 hw_dbg(hw, "Flow Control = TX PAUSE frames only.\n");
2280 } else if ((adv_reg & adv_sym) && (adv_reg & adv_asm) &&
2281 !(lp_reg & lp_sym) && (lp_reg & lp_asm)) {
2282 hw->fc.current_mode = ixgbe_fc_rx_pause;
2283 hw_dbg(hw, "Flow Control = RX PAUSE frames only.\n");
2284 } else {
2285 hw->fc.current_mode = ixgbe_fc_none;
2286 hw_dbg(hw, "Flow Control = NONE.\n");
2287 }
2288 return 0;
2289}
2290
2291/**
2292 * ixgbe_fc_autoneg_fiber - Enable flow control on 1 gig fiber
2293 * @hw: pointer to hardware structure
2294 *
2295 * Enable flow control according on 1 gig fiber.
2296 **/
2297static s32 ixgbe_fc_autoneg_fiber(struct ixgbe_hw *hw)
2298{
2299 u32 pcs_anadv_reg, pcs_lpab_reg, linkstat;
2300 s32 ret_val;
2301
2302 /*
2303 * On multispeed fiber at 1g, bail out if
2304 * - link is up but AN did not complete, or if
2305 * - link is up and AN completed but timed out
2306 */
2307
2308 linkstat = IXGBE_READ_REG(hw, IXGBE_PCS1GLSTA);
2309 if ((!!(linkstat & IXGBE_PCS1GLSTA_AN_COMPLETE) == 0) ||
2310 (!!(linkstat & IXGBE_PCS1GLSTA_AN_TIMED_OUT) == 1))
2311 return -EIO;
2312
2313 pcs_anadv_reg = IXGBE_READ_REG(hw, IXGBE_PCS1GANA);
2314 pcs_lpab_reg = IXGBE_READ_REG(hw, IXGBE_PCS1GANLP);
2315
2316 ret_val = ixgbe_negotiate_fc(hw, pcs_anadv_reg,
2317 pcs_lpab_reg, IXGBE_PCS1GANA_SYM_PAUSE,
2318 IXGBE_PCS1GANA_ASM_PAUSE,
2319 IXGBE_PCS1GANA_SYM_PAUSE,
2320 IXGBE_PCS1GANA_ASM_PAUSE);
2321
2322 return ret_val;
2323}
2324
2325/**
2326 * ixgbe_fc_autoneg_backplane - Enable flow control IEEE clause 37
2327 * @hw: pointer to hardware structure
2328 *
2329 * Enable flow control according to IEEE clause 37.
2330 **/
2331static s32 ixgbe_fc_autoneg_backplane(struct ixgbe_hw *hw)
2332{
2333 u32 links2, anlp1_reg, autoc_reg, links;
2334 s32 ret_val;
2335
2336 /*
2337 * On backplane, bail out if
2338 * - backplane autoneg was not completed, or if
2339 * - we are 82599 and link partner is not AN enabled
2340 */
2341 links = IXGBE_READ_REG(hw, IXGBE_LINKS);
2342 if ((links & IXGBE_LINKS_KX_AN_COMP) == 0)
2343 return -EIO;
2344
2345 if (hw->mac.type == ixgbe_mac_82599EB) {
2346 links2 = IXGBE_READ_REG(hw, IXGBE_LINKS2);
2347 if ((links2 & IXGBE_LINKS2_AN_SUPPORTED) == 0)
2348 return -EIO;
2349 }
2350 /*
2351 * Read the 10g AN autoc and LP ability registers and resolve
2352 * local flow control settings accordingly
2353 */
2354 autoc_reg = IXGBE_READ_REG(hw, IXGBE_AUTOC);
2355 anlp1_reg = IXGBE_READ_REG(hw, IXGBE_ANLP1);
2356
2357 ret_val = ixgbe_negotiate_fc(hw, autoc_reg,
2358 anlp1_reg, IXGBE_AUTOC_SYM_PAUSE, IXGBE_AUTOC_ASM_PAUSE,
2359 IXGBE_ANLP1_SYM_PAUSE, IXGBE_ANLP1_ASM_PAUSE);
2360
2361 return ret_val;
2362}
2363
2364/**
2365 * ixgbe_fc_autoneg_copper - Enable flow control IEEE clause 37
2366 * @hw: pointer to hardware structure
2367 *
2368 * Enable flow control according to IEEE clause 37.
2369 **/
2370static s32 ixgbe_fc_autoneg_copper(struct ixgbe_hw *hw)
2371{
2372 u16 technology_ability_reg = 0;
2373 u16 lp_technology_ability_reg = 0;
2374
2375 hw->phy.ops.read_reg(hw, MDIO_AN_ADVERTISE,
2376 MDIO_MMD_AN,
2377 &technology_ability_reg);
2378 hw->phy.ops.read_reg(hw, MDIO_AN_LPA,
2379 MDIO_MMD_AN,
2380 &lp_technology_ability_reg);
2381
2382 return ixgbe_negotiate_fc(hw, (u32)technology_ability_reg,
2383 (u32)lp_technology_ability_reg,
2384 IXGBE_TAF_SYM_PAUSE, IXGBE_TAF_ASM_PAUSE,
2385 IXGBE_TAF_SYM_PAUSE, IXGBE_TAF_ASM_PAUSE);
2386}
2387
2388/**
2389 * ixgbe_fc_autoneg - Configure flow control
2390 * @hw: pointer to hardware structure
2391 *
2392 * Compares our advertised flow control capabilities to those advertised by
2393 * our link partner, and determines the proper flow control mode to use.
2394 **/
2395void ixgbe_fc_autoneg(struct ixgbe_hw *hw)
2396{
2397 ixgbe_link_speed speed;
2398 s32 ret_val = -EIO;
2399 bool link_up;
2400
2401 /*
2402 * AN should have completed when the cable was plugged in.
2403 * Look for reasons to bail out. Bail out if:
2404 * - FC autoneg is disabled, or if
2405 * - link is not up.
2406 *
2407 * Since we're being called from an LSC, link is already known to be up.
2408 * So use link_up_wait_to_complete=false.
2409 */
2410 if (hw->fc.disable_fc_autoneg)
2411 goto out;
2412
2413 hw->mac.ops.check_link(hw, &speed, &link_up, false);
2414 if (!link_up)
2415 goto out;
2416
2417 switch (hw->phy.media_type) {
2418 /* Autoneg flow control on fiber adapters */
2419 case ixgbe_media_type_fiber:
2420 if (speed == IXGBE_LINK_SPEED_1GB_FULL)
2421 ret_val = ixgbe_fc_autoneg_fiber(hw);
2422 break;
2423
2424 /* Autoneg flow control on backplane adapters */
2425 case ixgbe_media_type_backplane:
2426 ret_val = ixgbe_fc_autoneg_backplane(hw);
2427 break;
2428
2429 /* Autoneg flow control on copper adapters */
2430 case ixgbe_media_type_copper:
2431 if (ixgbe_device_supports_autoneg_fc(hw))
2432 ret_val = ixgbe_fc_autoneg_copper(hw);
2433 break;
2434
2435 default:
2436 break;
2437 }
2438
2439out:
2440 if (ret_val == 0) {
2441 hw->fc.fc_was_autonegged = true;
2442 } else {
2443 hw->fc.fc_was_autonegged = false;
2444 hw->fc.current_mode = hw->fc.requested_mode;
2445 }
2446}
2447
2448/**
2449 * ixgbe_pcie_timeout_poll - Return number of times to poll for completion
2450 * @hw: pointer to hardware structure
2451 *
2452 * System-wide timeout range is encoded in PCIe Device Control2 register.
2453 *
2454 * Add 10% to specified maximum and return the number of times to poll for
2455 * completion timeout, in units of 100 microsec. Never return less than
2456 * 800 = 80 millisec.
2457 **/
2458static u32 ixgbe_pcie_timeout_poll(struct ixgbe_hw *hw)
2459{
2460 s16 devctl2;
2461 u32 pollcnt;
2462
2463 devctl2 = ixgbe_read_pci_cfg_word(hw, IXGBE_PCI_DEVICE_CONTROL2);
2464 devctl2 &= IXGBE_PCIDEVCTRL2_TIMEO_MASK;
2465
2466 switch (devctl2) {
2467 case IXGBE_PCIDEVCTRL2_65_130ms:
2468 pollcnt = 1300; /* 130 millisec */
2469 break;
2470 case IXGBE_PCIDEVCTRL2_260_520ms:
2471 pollcnt = 5200; /* 520 millisec */
2472 break;
2473 case IXGBE_PCIDEVCTRL2_1_2s:
2474 pollcnt = 20000; /* 2 sec */
2475 break;
2476 case IXGBE_PCIDEVCTRL2_4_8s:
2477 pollcnt = 80000; /* 8 sec */
2478 break;
2479 case IXGBE_PCIDEVCTRL2_17_34s:
2480 pollcnt = 34000; /* 34 sec */
2481 break;
2482 case IXGBE_PCIDEVCTRL2_50_100us: /* 100 microsecs */
2483 case IXGBE_PCIDEVCTRL2_1_2ms: /* 2 millisecs */
2484 case IXGBE_PCIDEVCTRL2_16_32ms: /* 32 millisec */
2485 case IXGBE_PCIDEVCTRL2_16_32ms_def: /* 32 millisec default */
2486 default:
2487 pollcnt = 800; /* 80 millisec minimum */
2488 break;
2489 }
2490
2491 /* add 10% to spec maximum */
2492 return (pollcnt * 11) / 10;
2493}
2494
2495/**
2496 * ixgbe_disable_pcie_primary - Disable PCI-express primary access
2497 * @hw: pointer to hardware structure
2498 *
2499 * Disables PCI-Express primary access and verifies there are no pending
2500 * requests. -EALREADY is returned if primary disable
2501 * bit hasn't caused the primary requests to be disabled, else 0
2502 * is returned signifying primary requests disabled.
2503 **/
2504static s32 ixgbe_disable_pcie_primary(struct ixgbe_hw *hw)
2505{
2506 u32 i, poll;
2507 u16 value;
2508
2509 /* Always set this bit to ensure any future transactions are blocked */
2510 IXGBE_WRITE_REG(hw, IXGBE_CTRL, IXGBE_CTRL_GIO_DIS);
2511
2512 /* Poll for bit to read as set */
2513 for (i = 0; i < IXGBE_PCI_PRIMARY_DISABLE_TIMEOUT; i++) {
2514 if (IXGBE_READ_REG(hw, IXGBE_CTRL) & IXGBE_CTRL_GIO_DIS)
2515 break;
2516 usleep_range(100, 120);
2517 }
2518 if (i >= IXGBE_PCI_PRIMARY_DISABLE_TIMEOUT) {
2519 hw_dbg(hw, "GIO disable did not set - requesting resets\n");
2520 goto gio_disable_fail;
2521 }
2522
2523 /* Exit if primary requests are blocked */
2524 if (!(IXGBE_READ_REG(hw, IXGBE_STATUS) & IXGBE_STATUS_GIO) ||
2525 ixgbe_removed(hw->hw_addr))
2526 return 0;
2527
2528 /* Poll for primary request bit to clear */
2529 for (i = 0; i < IXGBE_PCI_PRIMARY_DISABLE_TIMEOUT; i++) {
2530 udelay(100);
2531 if (!(IXGBE_READ_REG(hw, IXGBE_STATUS) & IXGBE_STATUS_GIO))
2532 return 0;
2533 }
2534
2535 /*
2536 * Two consecutive resets are required via CTRL.RST per datasheet
2537 * 5.2.5.3.2 Primary Disable. We set a flag to inform the reset routine
2538 * of this need. The first reset prevents new primary requests from
2539 * being issued by our device. We then must wait 1usec or more for any
2540 * remaining completions from the PCIe bus to trickle in, and then reset
2541 * again to clear out any effects they may have had on our device.
2542 */
2543 hw_dbg(hw, "GIO Primary Disable bit didn't clear - requesting resets\n");
2544gio_disable_fail:
2545 hw->mac.flags |= IXGBE_FLAGS_DOUBLE_RESET_REQUIRED;
2546
2547 if (hw->mac.type >= ixgbe_mac_X550)
2548 return 0;
2549
2550 /*
2551 * Before proceeding, make sure that the PCIe block does not have
2552 * transactions pending.
2553 */
2554 poll = ixgbe_pcie_timeout_poll(hw);
2555 for (i = 0; i < poll; i++) {
2556 udelay(100);
2557 value = ixgbe_read_pci_cfg_word(hw, IXGBE_PCI_DEVICE_STATUS);
2558 if (ixgbe_removed(hw->hw_addr))
2559 return 0;
2560 if (!(value & IXGBE_PCI_DEVICE_STATUS_TRANSACTION_PENDING))
2561 return 0;
2562 }
2563
2564 hw_dbg(hw, "PCIe transaction pending bit also did not clear.\n");
2565 return -EALREADY;
2566}
2567
2568/**
2569 * ixgbe_acquire_swfw_sync - Acquire SWFW semaphore
2570 * @hw: pointer to hardware structure
2571 * @mask: Mask to specify which semaphore to acquire
2572 *
2573 * Acquires the SWFW semaphore through the GSSR register for the specified
2574 * function (CSR, PHY0, PHY1, EEPROM, Flash)
2575 **/
2576s32 ixgbe_acquire_swfw_sync(struct ixgbe_hw *hw, u32 mask)
2577{
2578 u32 gssr = 0;
2579 u32 swmask = mask;
2580 u32 fwmask = mask << 5;
2581 u32 timeout = 200;
2582 u32 i;
2583
2584 for (i = 0; i < timeout; i++) {
2585 /*
2586 * SW NVM semaphore bit is used for access to all
2587 * SW_FW_SYNC bits (not just NVM)
2588 */
2589 if (ixgbe_get_eeprom_semaphore(hw))
2590 return -EBUSY;
2591
2592 gssr = IXGBE_READ_REG(hw, IXGBE_GSSR);
2593 if (!(gssr & (fwmask | swmask))) {
2594 gssr |= swmask;
2595 IXGBE_WRITE_REG(hw, IXGBE_GSSR, gssr);
2596 ixgbe_release_eeprom_semaphore(hw);
2597 return 0;
2598 } else {
2599 /* Resource is currently in use by FW or SW */
2600 ixgbe_release_eeprom_semaphore(hw);
2601 usleep_range(5000, 10000);
2602 }
2603 }
2604
2605 /* If time expired clear the bits holding the lock and retry */
2606 if (gssr & (fwmask | swmask))
2607 ixgbe_release_swfw_sync(hw, gssr & (fwmask | swmask));
2608
2609 usleep_range(5000, 10000);
2610 return -EBUSY;
2611}
2612
2613/**
2614 * ixgbe_release_swfw_sync - Release SWFW semaphore
2615 * @hw: pointer to hardware structure
2616 * @mask: Mask to specify which semaphore to release
2617 *
2618 * Releases the SWFW semaphore through the GSSR register for the specified
2619 * function (CSR, PHY0, PHY1, EEPROM, Flash)
2620 **/
2621void ixgbe_release_swfw_sync(struct ixgbe_hw *hw, u32 mask)
2622{
2623 u32 gssr;
2624 u32 swmask = mask;
2625
2626 ixgbe_get_eeprom_semaphore(hw);
2627
2628 gssr = IXGBE_READ_REG(hw, IXGBE_GSSR);
2629 gssr &= ~swmask;
2630 IXGBE_WRITE_REG(hw, IXGBE_GSSR, gssr);
2631
2632 ixgbe_release_eeprom_semaphore(hw);
2633}
2634
2635/**
2636 * prot_autoc_read_generic - Hides MAC differences needed for AUTOC read
2637 * @hw: pointer to hardware structure
2638 * @reg_val: Value we read from AUTOC
2639 * @locked: bool to indicate whether the SW/FW lock should be taken. Never
2640 * true in this the generic case.
2641 *
2642 * The default case requires no protection so just to the register read.
2643 **/
2644s32 prot_autoc_read_generic(struct ixgbe_hw *hw, bool *locked, u32 *reg_val)
2645{
2646 *locked = false;
2647 *reg_val = IXGBE_READ_REG(hw, IXGBE_AUTOC);
2648 return 0;
2649}
2650
2651/**
2652 * prot_autoc_write_generic - Hides MAC differences needed for AUTOC write
2653 * @hw: pointer to hardware structure
2654 * @reg_val: value to write to AUTOC
2655 * @locked: bool to indicate whether the SW/FW lock was already taken by
2656 * previous read.
2657 **/
2658s32 prot_autoc_write_generic(struct ixgbe_hw *hw, u32 reg_val, bool locked)
2659{
2660 IXGBE_WRITE_REG(hw, IXGBE_AUTOC, reg_val);
2661 return 0;
2662}
2663
2664/**
2665 * ixgbe_disable_rx_buff_generic - Stops the receive data path
2666 * @hw: pointer to hardware structure
2667 *
2668 * Stops the receive data path and waits for the HW to internally
2669 * empty the Rx security block.
2670 **/
2671s32 ixgbe_disable_rx_buff_generic(struct ixgbe_hw *hw)
2672{
2673#define IXGBE_MAX_SECRX_POLL 40
2674 int i;
2675 int secrxreg;
2676
2677 secrxreg = IXGBE_READ_REG(hw, IXGBE_SECRXCTRL);
2678 secrxreg |= IXGBE_SECRXCTRL_RX_DIS;
2679 IXGBE_WRITE_REG(hw, IXGBE_SECRXCTRL, secrxreg);
2680 for (i = 0; i < IXGBE_MAX_SECRX_POLL; i++) {
2681 secrxreg = IXGBE_READ_REG(hw, IXGBE_SECRXSTAT);
2682 if (secrxreg & IXGBE_SECRXSTAT_SECRX_RDY)
2683 break;
2684 else
2685 /* Use interrupt-safe sleep just in case */
2686 udelay(1000);
2687 }
2688
2689 /* For informational purposes only */
2690 if (i >= IXGBE_MAX_SECRX_POLL)
2691 hw_dbg(hw, "Rx unit being enabled before security path fully disabled. Continuing with init.\n");
2692
2693 return 0;
2694
2695}
2696
2697/**
2698 * ixgbe_enable_rx_buff_generic - Enables the receive data path
2699 * @hw: pointer to hardware structure
2700 *
2701 * Enables the receive data path
2702 **/
2703s32 ixgbe_enable_rx_buff_generic(struct ixgbe_hw *hw)
2704{
2705 u32 secrxreg;
2706
2707 secrxreg = IXGBE_READ_REG(hw, IXGBE_SECRXCTRL);
2708 secrxreg &= ~IXGBE_SECRXCTRL_RX_DIS;
2709 IXGBE_WRITE_REG(hw, IXGBE_SECRXCTRL, secrxreg);
2710 IXGBE_WRITE_FLUSH(hw);
2711
2712 return 0;
2713}
2714
2715/**
2716 * ixgbe_enable_rx_dma_generic - Enable the Rx DMA unit
2717 * @hw: pointer to hardware structure
2718 * @regval: register value to write to RXCTRL
2719 *
2720 * Enables the Rx DMA unit
2721 **/
2722s32 ixgbe_enable_rx_dma_generic(struct ixgbe_hw *hw, u32 regval)
2723{
2724 if (regval & IXGBE_RXCTRL_RXEN)
2725 hw->mac.ops.enable_rx(hw);
2726 else
2727 hw->mac.ops.disable_rx(hw);
2728
2729 return 0;
2730}
2731
2732/**
2733 * ixgbe_blink_led_start_generic - Blink LED based on index.
2734 * @hw: pointer to hardware structure
2735 * @index: led number to blink
2736 **/
2737s32 ixgbe_blink_led_start_generic(struct ixgbe_hw *hw, u32 index)
2738{
2739 ixgbe_link_speed speed = 0;
2740 bool link_up = false;
2741 u32 autoc_reg = IXGBE_READ_REG(hw, IXGBE_AUTOC);
2742 u32 led_reg = IXGBE_READ_REG(hw, IXGBE_LEDCTL);
2743 bool locked = false;
2744 s32 ret_val;
2745
2746 if (index > 3)
2747 return -EINVAL;
2748
2749 /*
2750 * Link must be up to auto-blink the LEDs;
2751 * Force it if link is down.
2752 */
2753 hw->mac.ops.check_link(hw, &speed, &link_up, false);
2754
2755 if (!link_up) {
2756 ret_val = hw->mac.ops.prot_autoc_read(hw, &locked, &autoc_reg);
2757 if (ret_val)
2758 return ret_val;
2759
2760 autoc_reg |= IXGBE_AUTOC_AN_RESTART;
2761 autoc_reg |= IXGBE_AUTOC_FLU;
2762
2763 ret_val = hw->mac.ops.prot_autoc_write(hw, autoc_reg, locked);
2764 if (ret_val)
2765 return ret_val;
2766
2767 IXGBE_WRITE_FLUSH(hw);
2768
2769 usleep_range(10000, 20000);
2770 }
2771
2772 led_reg &= ~IXGBE_LED_MODE_MASK(index);
2773 led_reg |= IXGBE_LED_BLINK(index);
2774 IXGBE_WRITE_REG(hw, IXGBE_LEDCTL, led_reg);
2775 IXGBE_WRITE_FLUSH(hw);
2776
2777 return 0;
2778}
2779
2780/**
2781 * ixgbe_blink_led_stop_generic - Stop blinking LED based on index.
2782 * @hw: pointer to hardware structure
2783 * @index: led number to stop blinking
2784 **/
2785s32 ixgbe_blink_led_stop_generic(struct ixgbe_hw *hw, u32 index)
2786{
2787 u32 autoc_reg = 0;
2788 u32 led_reg = IXGBE_READ_REG(hw, IXGBE_LEDCTL);
2789 bool locked = false;
2790 s32 ret_val;
2791
2792 if (index > 3)
2793 return -EINVAL;
2794
2795 ret_val = hw->mac.ops.prot_autoc_read(hw, &locked, &autoc_reg);
2796 if (ret_val)
2797 return ret_val;
2798
2799 autoc_reg &= ~IXGBE_AUTOC_FLU;
2800 autoc_reg |= IXGBE_AUTOC_AN_RESTART;
2801
2802 ret_val = hw->mac.ops.prot_autoc_write(hw, autoc_reg, locked);
2803 if (ret_val)
2804 return ret_val;
2805
2806 led_reg &= ~IXGBE_LED_MODE_MASK(index);
2807 led_reg &= ~IXGBE_LED_BLINK(index);
2808 led_reg |= IXGBE_LED_LINK_ACTIVE << IXGBE_LED_MODE_SHIFT(index);
2809 IXGBE_WRITE_REG(hw, IXGBE_LEDCTL, led_reg);
2810 IXGBE_WRITE_FLUSH(hw);
2811
2812 return 0;
2813}
2814
2815/**
2816 * ixgbe_get_san_mac_addr_offset - Get SAN MAC address offset from the EEPROM
2817 * @hw: pointer to hardware structure
2818 * @san_mac_offset: SAN MAC address offset
2819 *
2820 * This function will read the EEPROM location for the SAN MAC address
2821 * pointer, and returns the value at that location. This is used in both
2822 * get and set mac_addr routines.
2823 **/
2824static s32 ixgbe_get_san_mac_addr_offset(struct ixgbe_hw *hw,
2825 u16 *san_mac_offset)
2826{
2827 s32 ret_val;
2828
2829 /*
2830 * First read the EEPROM pointer to see if the MAC addresses are
2831 * available.
2832 */
2833 ret_val = hw->eeprom.ops.read(hw, IXGBE_SAN_MAC_ADDR_PTR,
2834 san_mac_offset);
2835 if (ret_val)
2836 hw_err(hw, "eeprom read at offset %d failed\n",
2837 IXGBE_SAN_MAC_ADDR_PTR);
2838
2839 return ret_val;
2840}
2841
2842/**
2843 * ixgbe_get_san_mac_addr_generic - SAN MAC address retrieval from the EEPROM
2844 * @hw: pointer to hardware structure
2845 * @san_mac_addr: SAN MAC address
2846 *
2847 * Reads the SAN MAC address from the EEPROM, if it's available. This is
2848 * per-port, so set_lan_id() must be called before reading the addresses.
2849 * set_lan_id() is called by identify_sfp(), but this cannot be relied
2850 * upon for non-SFP connections, so we must call it here.
2851 **/
2852s32 ixgbe_get_san_mac_addr_generic(struct ixgbe_hw *hw, u8 *san_mac_addr)
2853{
2854 u16 san_mac_data, san_mac_offset;
2855 u8 i;
2856 s32 ret_val;
2857
2858 /*
2859 * First read the EEPROM pointer to see if the MAC addresses are
2860 * available. If they're not, no point in calling set_lan_id() here.
2861 */
2862 ret_val = ixgbe_get_san_mac_addr_offset(hw, &san_mac_offset);
2863 if (ret_val || san_mac_offset == 0 || san_mac_offset == 0xFFFF)
2864
2865 goto san_mac_addr_clr;
2866
2867 /* make sure we know which port we need to program */
2868 hw->mac.ops.set_lan_id(hw);
2869 /* apply the port offset to the address offset */
2870 (hw->bus.func) ? (san_mac_offset += IXGBE_SAN_MAC_ADDR_PORT1_OFFSET) :
2871 (san_mac_offset += IXGBE_SAN_MAC_ADDR_PORT0_OFFSET);
2872 for (i = 0; i < 3; i++) {
2873 ret_val = hw->eeprom.ops.read(hw, san_mac_offset,
2874 &san_mac_data);
2875 if (ret_val) {
2876 hw_err(hw, "eeprom read at offset %d failed\n",
2877 san_mac_offset);
2878 goto san_mac_addr_clr;
2879 }
2880 san_mac_addr[i * 2] = (u8)(san_mac_data);
2881 san_mac_addr[i * 2 + 1] = (u8)(san_mac_data >> 8);
2882 san_mac_offset++;
2883 }
2884 return 0;
2885
2886san_mac_addr_clr:
2887 /* No addresses available in this EEPROM. It's not necessarily an
2888 * error though, so just wipe the local address and return.
2889 */
2890 for (i = 0; i < 6; i++)
2891 san_mac_addr[i] = 0xFF;
2892 return ret_val;
2893}
2894
2895/**
2896 * ixgbe_get_pcie_msix_count_generic - Gets MSI-X vector count
2897 * @hw: pointer to hardware structure
2898 *
2899 * Read PCIe configuration space, and get the MSI-X vector count from
2900 * the capabilities table.
2901 **/
2902u16 ixgbe_get_pcie_msix_count_generic(struct ixgbe_hw *hw)
2903{
2904 u16 msix_count;
2905 u16 max_msix_count;
2906 u16 pcie_offset;
2907
2908 switch (hw->mac.type) {
2909 case ixgbe_mac_82598EB:
2910 pcie_offset = IXGBE_PCIE_MSIX_82598_CAPS;
2911 max_msix_count = IXGBE_MAX_MSIX_VECTORS_82598;
2912 break;
2913 case ixgbe_mac_82599EB:
2914 case ixgbe_mac_X540:
2915 case ixgbe_mac_X550:
2916 case ixgbe_mac_X550EM_x:
2917 case ixgbe_mac_x550em_a:
2918 pcie_offset = IXGBE_PCIE_MSIX_82599_CAPS;
2919 max_msix_count = IXGBE_MAX_MSIX_VECTORS_82599;
2920 break;
2921 default:
2922 return 1;
2923 }
2924
2925 msix_count = ixgbe_read_pci_cfg_word(hw, pcie_offset);
2926 if (ixgbe_removed(hw->hw_addr))
2927 msix_count = 0;
2928 msix_count &= IXGBE_PCIE_MSIX_TBL_SZ_MASK;
2929
2930 /* MSI-X count is zero-based in HW */
2931 msix_count++;
2932
2933 if (msix_count > max_msix_count)
2934 msix_count = max_msix_count;
2935
2936 return msix_count;
2937}
2938
2939/**
2940 * ixgbe_clear_vmdq_generic - Disassociate a VMDq pool index from a rx address
2941 * @hw: pointer to hardware struct
2942 * @rar: receive address register index to disassociate
2943 * @vmdq: VMDq pool index to remove from the rar
2944 **/
2945s32 ixgbe_clear_vmdq_generic(struct ixgbe_hw *hw, u32 rar, u32 vmdq)
2946{
2947 u32 mpsar_lo, mpsar_hi;
2948 u32 rar_entries = hw->mac.num_rar_entries;
2949
2950 /* Make sure we are using a valid rar index range */
2951 if (rar >= rar_entries) {
2952 hw_dbg(hw, "RAR index %d is out of range.\n", rar);
2953 return -EINVAL;
2954 }
2955
2956 mpsar_lo = IXGBE_READ_REG(hw, IXGBE_MPSAR_LO(rar));
2957 mpsar_hi = IXGBE_READ_REG(hw, IXGBE_MPSAR_HI(rar));
2958
2959 if (ixgbe_removed(hw->hw_addr))
2960 return 0;
2961
2962 if (!mpsar_lo && !mpsar_hi)
2963 return 0;
2964
2965 if (vmdq == IXGBE_CLEAR_VMDQ_ALL) {
2966 if (mpsar_lo) {
2967 IXGBE_WRITE_REG(hw, IXGBE_MPSAR_LO(rar), 0);
2968 mpsar_lo = 0;
2969 }
2970 if (mpsar_hi) {
2971 IXGBE_WRITE_REG(hw, IXGBE_MPSAR_HI(rar), 0);
2972 mpsar_hi = 0;
2973 }
2974 } else if (vmdq < 32) {
2975 mpsar_lo &= ~BIT(vmdq);
2976 IXGBE_WRITE_REG(hw, IXGBE_MPSAR_LO(rar), mpsar_lo);
2977 } else {
2978 mpsar_hi &= ~BIT(vmdq - 32);
2979 IXGBE_WRITE_REG(hw, IXGBE_MPSAR_HI(rar), mpsar_hi);
2980 }
2981
2982 /* was that the last pool using this rar? */
2983 if (mpsar_lo == 0 && mpsar_hi == 0 &&
2984 rar != 0 && rar != hw->mac.san_mac_rar_index)
2985 hw->mac.ops.clear_rar(hw, rar);
2986
2987 return 0;
2988}
2989
2990/**
2991 * ixgbe_set_vmdq_generic - Associate a VMDq pool index with a rx address
2992 * @hw: pointer to hardware struct
2993 * @rar: receive address register index to associate with a VMDq index
2994 * @vmdq: VMDq pool index
2995 **/
2996s32 ixgbe_set_vmdq_generic(struct ixgbe_hw *hw, u32 rar, u32 vmdq)
2997{
2998 u32 mpsar;
2999 u32 rar_entries = hw->mac.num_rar_entries;
3000
3001 /* Make sure we are using a valid rar index range */
3002 if (rar >= rar_entries) {
3003 hw_dbg(hw, "RAR index %d is out of range.\n", rar);
3004 return -EINVAL;
3005 }
3006
3007 if (vmdq < 32) {
3008 mpsar = IXGBE_READ_REG(hw, IXGBE_MPSAR_LO(rar));
3009 mpsar |= BIT(vmdq);
3010 IXGBE_WRITE_REG(hw, IXGBE_MPSAR_LO(rar), mpsar);
3011 } else {
3012 mpsar = IXGBE_READ_REG(hw, IXGBE_MPSAR_HI(rar));
3013 mpsar |= BIT(vmdq - 32);
3014 IXGBE_WRITE_REG(hw, IXGBE_MPSAR_HI(rar), mpsar);
3015 }
3016 return 0;
3017}
3018
3019/**
3020 * ixgbe_set_vmdq_san_mac_generic - Associate VMDq pool index with a rx address
3021 * @hw: pointer to hardware struct
3022 * @vmdq: VMDq pool index
3023 *
3024 * This function should only be involved in the IOV mode.
3025 * In IOV mode, Default pool is next pool after the number of
3026 * VFs advertized and not 0.
3027 * MPSAR table needs to be updated for SAN_MAC RAR [hw->mac.san_mac_rar_index]
3028 **/
3029s32 ixgbe_set_vmdq_san_mac_generic(struct ixgbe_hw *hw, u32 vmdq)
3030{
3031 u32 rar = hw->mac.san_mac_rar_index;
3032
3033 if (vmdq < 32) {
3034 IXGBE_WRITE_REG(hw, IXGBE_MPSAR_LO(rar), BIT(vmdq));
3035 IXGBE_WRITE_REG(hw, IXGBE_MPSAR_HI(rar), 0);
3036 } else {
3037 IXGBE_WRITE_REG(hw, IXGBE_MPSAR_LO(rar), 0);
3038 IXGBE_WRITE_REG(hw, IXGBE_MPSAR_HI(rar), BIT(vmdq - 32));
3039 }
3040
3041 return 0;
3042}
3043
3044/**
3045 * ixgbe_init_uta_tables_generic - Initialize the Unicast Table Array
3046 * @hw: pointer to hardware structure
3047 **/
3048s32 ixgbe_init_uta_tables_generic(struct ixgbe_hw *hw)
3049{
3050 int i;
3051
3052 for (i = 0; i < 128; i++)
3053 IXGBE_WRITE_REG(hw, IXGBE_UTA(i), 0);
3054
3055 return 0;
3056}
3057
3058/**
3059 * ixgbe_find_vlvf_slot - find the vlanid or the first empty slot
3060 * @hw: pointer to hardware structure
3061 * @vlan: VLAN id to write to VLAN filter
3062 * @vlvf_bypass: true to find vlanid only, false returns first empty slot if
3063 * vlanid not found
3064 *
3065 * return the VLVF index where this VLAN id should be placed
3066 *
3067 **/
3068static s32 ixgbe_find_vlvf_slot(struct ixgbe_hw *hw, u32 vlan, bool vlvf_bypass)
3069{
3070 s32 regindex, first_empty_slot;
3071 u32 bits;
3072
3073 /* short cut the special case */
3074 if (vlan == 0)
3075 return 0;
3076
3077 /* if vlvf_bypass is set we don't want to use an empty slot, we
3078 * will simply bypass the VLVF if there are no entries present in the
3079 * VLVF that contain our VLAN
3080 */
3081 first_empty_slot = vlvf_bypass ? -ENOSPC : 0;
3082
3083 /* add VLAN enable bit for comparison */
3084 vlan |= IXGBE_VLVF_VIEN;
3085
3086 /* Search for the vlan id in the VLVF entries. Save off the first empty
3087 * slot found along the way.
3088 *
3089 * pre-decrement loop covering (IXGBE_VLVF_ENTRIES - 1) .. 1
3090 */
3091 for (regindex = IXGBE_VLVF_ENTRIES; --regindex;) {
3092 bits = IXGBE_READ_REG(hw, IXGBE_VLVF(regindex));
3093 if (bits == vlan)
3094 return regindex;
3095 if (!first_empty_slot && !bits)
3096 first_empty_slot = regindex;
3097 }
3098
3099 /* If we are here then we didn't find the VLAN. Return first empty
3100 * slot we found during our search, else error.
3101 */
3102 if (!first_empty_slot)
3103 hw_dbg(hw, "No space in VLVF.\n");
3104
3105 return first_empty_slot ? : -ENOSPC;
3106}
3107
3108/**
3109 * ixgbe_set_vfta_generic - Set VLAN filter table
3110 * @hw: pointer to hardware structure
3111 * @vlan: VLAN id to write to VLAN filter
3112 * @vind: VMDq output index that maps queue to VLAN id in VFVFB
3113 * @vlan_on: boolean flag to turn on/off VLAN in VFVF
3114 * @vlvf_bypass: boolean flag indicating updating default pool is okay
3115 *
3116 * Turn on/off specified VLAN in the VLAN filter table.
3117 **/
3118s32 ixgbe_set_vfta_generic(struct ixgbe_hw *hw, u32 vlan, u32 vind,
3119 bool vlan_on, bool vlvf_bypass)
3120{
3121 u32 regidx, vfta_delta, vfta, bits;
3122 s32 vlvf_index;
3123
3124 if ((vlan > 4095) || (vind > 63))
3125 return -EINVAL;
3126
3127 /*
3128 * this is a 2 part operation - first the VFTA, then the
3129 * VLVF and VLVFB if VT Mode is set
3130 * We don't write the VFTA until we know the VLVF part succeeded.
3131 */
3132
3133 /* Part 1
3134 * The VFTA is a bitstring made up of 128 32-bit registers
3135 * that enable the particular VLAN id, much like the MTA:
3136 * bits[11-5]: which register
3137 * bits[4-0]: which bit in the register
3138 */
3139 regidx = vlan / 32;
3140 vfta_delta = BIT(vlan % 32);
3141 vfta = IXGBE_READ_REG(hw, IXGBE_VFTA(regidx));
3142
3143 /* vfta_delta represents the difference between the current value
3144 * of vfta and the value we want in the register. Since the diff
3145 * is an XOR mask we can just update vfta using an XOR.
3146 */
3147 vfta_delta &= vlan_on ? ~vfta : vfta;
3148 vfta ^= vfta_delta;
3149
3150 /* Part 2
3151 * If VT Mode is set
3152 * Either vlan_on
3153 * make sure the vlan is in VLVF
3154 * set the vind bit in the matching VLVFB
3155 * Or !vlan_on
3156 * clear the pool bit and possibly the vind
3157 */
3158 if (!(IXGBE_READ_REG(hw, IXGBE_VT_CTL) & IXGBE_VT_CTL_VT_ENABLE))
3159 goto vfta_update;
3160
3161 vlvf_index = ixgbe_find_vlvf_slot(hw, vlan, vlvf_bypass);
3162 if (vlvf_index < 0) {
3163 if (vlvf_bypass)
3164 goto vfta_update;
3165 return vlvf_index;
3166 }
3167
3168 bits = IXGBE_READ_REG(hw, IXGBE_VLVFB(vlvf_index * 2 + vind / 32));
3169
3170 /* set the pool bit */
3171 bits |= BIT(vind % 32);
3172 if (vlan_on)
3173 goto vlvf_update;
3174
3175 /* clear the pool bit */
3176 bits ^= BIT(vind % 32);
3177
3178 if (!bits &&
3179 !IXGBE_READ_REG(hw, IXGBE_VLVFB(vlvf_index * 2 + 1 - vind / 32))) {
3180 /* Clear VFTA first, then disable VLVF. Otherwise
3181 * we run the risk of stray packets leaking into
3182 * the PF via the default pool
3183 */
3184 if (vfta_delta)
3185 IXGBE_WRITE_REG(hw, IXGBE_VFTA(regidx), vfta);
3186
3187 /* disable VLVF and clear remaining bit from pool */
3188 IXGBE_WRITE_REG(hw, IXGBE_VLVF(vlvf_index), 0);
3189 IXGBE_WRITE_REG(hw, IXGBE_VLVFB(vlvf_index * 2 + vind / 32), 0);
3190
3191 return 0;
3192 }
3193
3194 /* If there are still bits set in the VLVFB registers
3195 * for the VLAN ID indicated we need to see if the
3196 * caller is requesting that we clear the VFTA entry bit.
3197 * If the caller has requested that we clear the VFTA
3198 * entry bit but there are still pools/VFs using this VLAN
3199 * ID entry then ignore the request. We're not worried
3200 * about the case where we're turning the VFTA VLAN ID
3201 * entry bit on, only when requested to turn it off as
3202 * there may be multiple pools and/or VFs using the
3203 * VLAN ID entry. In that case we cannot clear the
3204 * VFTA bit until all pools/VFs using that VLAN ID have also
3205 * been cleared. This will be indicated by "bits" being
3206 * zero.
3207 */
3208 vfta_delta = 0;
3209
3210vlvf_update:
3211 /* record pool change and enable VLAN ID if not already enabled */
3212 IXGBE_WRITE_REG(hw, IXGBE_VLVFB(vlvf_index * 2 + vind / 32), bits);
3213 IXGBE_WRITE_REG(hw, IXGBE_VLVF(vlvf_index), IXGBE_VLVF_VIEN | vlan);
3214
3215vfta_update:
3216 /* Update VFTA now that we are ready for traffic */
3217 if (vfta_delta)
3218 IXGBE_WRITE_REG(hw, IXGBE_VFTA(regidx), vfta);
3219
3220 return 0;
3221}
3222
3223/**
3224 * ixgbe_clear_vfta_generic - Clear VLAN filter table
3225 * @hw: pointer to hardware structure
3226 *
3227 * Clears the VLAN filter table, and the VMDq index associated with the filter
3228 **/
3229s32 ixgbe_clear_vfta_generic(struct ixgbe_hw *hw)
3230{
3231 u32 offset;
3232
3233 for (offset = 0; offset < hw->mac.vft_size; offset++)
3234 IXGBE_WRITE_REG(hw, IXGBE_VFTA(offset), 0);
3235
3236 for (offset = 0; offset < IXGBE_VLVF_ENTRIES; offset++) {
3237 IXGBE_WRITE_REG(hw, IXGBE_VLVF(offset), 0);
3238 IXGBE_WRITE_REG(hw, IXGBE_VLVFB(offset * 2), 0);
3239 IXGBE_WRITE_REG(hw, IXGBE_VLVFB(offset * 2 + 1), 0);
3240 }
3241
3242 return 0;
3243}
3244
3245/**
3246 * ixgbe_need_crosstalk_fix - Determine if we need to do cross talk fix
3247 * @hw: pointer to hardware structure
3248 *
3249 * Contains the logic to identify if we need to verify link for the
3250 * crosstalk fix
3251 **/
3252static bool ixgbe_need_crosstalk_fix(struct ixgbe_hw *hw)
3253{
3254 /* Does FW say we need the fix */
3255 if (!hw->need_crosstalk_fix)
3256 return false;
3257
3258 /* Only consider SFP+ PHYs i.e. media type fiber */
3259 switch (hw->mac.ops.get_media_type(hw)) {
3260 case ixgbe_media_type_fiber:
3261 case ixgbe_media_type_fiber_qsfp:
3262 break;
3263 default:
3264 return false;
3265 }
3266
3267 return true;
3268}
3269
3270/**
3271 * ixgbe_check_mac_link_generic - Determine link and speed status
3272 * @hw: pointer to hardware structure
3273 * @speed: pointer to link speed
3274 * @link_up: true when link is up
3275 * @link_up_wait_to_complete: bool used to wait for link up or not
3276 *
3277 * Reads the links register to determine if link is up and the current speed
3278 **/
3279s32 ixgbe_check_mac_link_generic(struct ixgbe_hw *hw, ixgbe_link_speed *speed,
3280 bool *link_up, bool link_up_wait_to_complete)
3281{
3282 bool crosstalk_fix_active = ixgbe_need_crosstalk_fix(hw);
3283 u32 links_reg, links_orig;
3284 u32 i;
3285
3286 /* If Crosstalk fix enabled do the sanity check of making sure
3287 * the SFP+ cage is full.
3288 */
3289 if (crosstalk_fix_active) {
3290 u32 sfp_cage_full;
3291
3292 switch (hw->mac.type) {
3293 case ixgbe_mac_82599EB:
3294 sfp_cage_full = IXGBE_READ_REG(hw, IXGBE_ESDP) &
3295 IXGBE_ESDP_SDP2;
3296 break;
3297 case ixgbe_mac_X550EM_x:
3298 case ixgbe_mac_x550em_a:
3299 sfp_cage_full = IXGBE_READ_REG(hw, IXGBE_ESDP) &
3300 IXGBE_ESDP_SDP0;
3301 break;
3302 default:
3303 /* sanity check - No SFP+ devices here */
3304 sfp_cage_full = false;
3305 break;
3306 }
3307
3308 if (!sfp_cage_full) {
3309 *link_up = false;
3310 *speed = IXGBE_LINK_SPEED_UNKNOWN;
3311 return 0;
3312 }
3313 }
3314
3315 /* clear the old state */
3316 links_orig = IXGBE_READ_REG(hw, IXGBE_LINKS);
3317
3318 links_reg = IXGBE_READ_REG(hw, IXGBE_LINKS);
3319
3320 if (links_orig != links_reg) {
3321 hw_dbg(hw, "LINKS changed from %08X to %08X\n",
3322 links_orig, links_reg);
3323 }
3324
3325 if (link_up_wait_to_complete) {
3326 for (i = 0; i < IXGBE_LINK_UP_TIME; i++) {
3327 if (links_reg & IXGBE_LINKS_UP) {
3328 *link_up = true;
3329 break;
3330 } else {
3331 *link_up = false;
3332 }
3333 msleep(100);
3334 links_reg = IXGBE_READ_REG(hw, IXGBE_LINKS);
3335 }
3336 } else {
3337 if (links_reg & IXGBE_LINKS_UP) {
3338 if (crosstalk_fix_active) {
3339 /* Check the link state again after a delay
3340 * to filter out spurious link up
3341 * notifications.
3342 */
3343 mdelay(5);
3344 links_reg = IXGBE_READ_REG(hw, IXGBE_LINKS);
3345 if (!(links_reg & IXGBE_LINKS_UP)) {
3346 *link_up = false;
3347 *speed = IXGBE_LINK_SPEED_UNKNOWN;
3348 return 0;
3349 }
3350 }
3351 *link_up = true;
3352 } else {
3353 *link_up = false;
3354 }
3355 }
3356
3357 switch (links_reg & IXGBE_LINKS_SPEED_82599) {
3358 case IXGBE_LINKS_SPEED_10G_82599:
3359 if ((hw->mac.type >= ixgbe_mac_X550) &&
3360 (links_reg & IXGBE_LINKS_SPEED_NON_STD))
3361 *speed = IXGBE_LINK_SPEED_2_5GB_FULL;
3362 else
3363 *speed = IXGBE_LINK_SPEED_10GB_FULL;
3364 break;
3365 case IXGBE_LINKS_SPEED_1G_82599:
3366 *speed = IXGBE_LINK_SPEED_1GB_FULL;
3367 break;
3368 case IXGBE_LINKS_SPEED_100_82599:
3369 if ((hw->mac.type >= ixgbe_mac_X550) &&
3370 (links_reg & IXGBE_LINKS_SPEED_NON_STD))
3371 *speed = IXGBE_LINK_SPEED_5GB_FULL;
3372 else
3373 *speed = IXGBE_LINK_SPEED_100_FULL;
3374 break;
3375 case IXGBE_LINKS_SPEED_10_X550EM_A:
3376 *speed = IXGBE_LINK_SPEED_UNKNOWN;
3377 if (hw->device_id == IXGBE_DEV_ID_X550EM_A_1G_T ||
3378 hw->device_id == IXGBE_DEV_ID_X550EM_A_1G_T_L) {
3379 *speed = IXGBE_LINK_SPEED_10_FULL;
3380 }
3381 break;
3382 default:
3383 *speed = IXGBE_LINK_SPEED_UNKNOWN;
3384 }
3385
3386 return 0;
3387}
3388
3389/**
3390 * ixgbe_get_wwn_prefix_generic - Get alternative WWNN/WWPN prefix from
3391 * the EEPROM
3392 * @hw: pointer to hardware structure
3393 * @wwnn_prefix: the alternative WWNN prefix
3394 * @wwpn_prefix: the alternative WWPN prefix
3395 *
3396 * This function will read the EEPROM from the alternative SAN MAC address
3397 * block to check the support for the alternative WWNN/WWPN prefix support.
3398 **/
3399s32 ixgbe_get_wwn_prefix_generic(struct ixgbe_hw *hw, u16 *wwnn_prefix,
3400 u16 *wwpn_prefix)
3401{
3402 u16 offset, caps;
3403 u16 alt_san_mac_blk_offset;
3404
3405 /* clear output first */
3406 *wwnn_prefix = 0xFFFF;
3407 *wwpn_prefix = 0xFFFF;
3408
3409 /* check if alternative SAN MAC is supported */
3410 offset = IXGBE_ALT_SAN_MAC_ADDR_BLK_PTR;
3411 if (hw->eeprom.ops.read(hw, offset, &alt_san_mac_blk_offset))
3412 goto wwn_prefix_err;
3413
3414 if ((alt_san_mac_blk_offset == 0) ||
3415 (alt_san_mac_blk_offset == 0xFFFF))
3416 return 0;
3417
3418 /* check capability in alternative san mac address block */
3419 offset = alt_san_mac_blk_offset + IXGBE_ALT_SAN_MAC_ADDR_CAPS_OFFSET;
3420 if (hw->eeprom.ops.read(hw, offset, &caps))
3421 goto wwn_prefix_err;
3422 if (!(caps & IXGBE_ALT_SAN_MAC_ADDR_CAPS_ALTWWN))
3423 return 0;
3424
3425 /* get the corresponding prefix for WWNN/WWPN */
3426 offset = alt_san_mac_blk_offset + IXGBE_ALT_SAN_MAC_ADDR_WWNN_OFFSET;
3427 if (hw->eeprom.ops.read(hw, offset, wwnn_prefix))
3428 hw_err(hw, "eeprom read at offset %d failed\n", offset);
3429
3430 offset = alt_san_mac_blk_offset + IXGBE_ALT_SAN_MAC_ADDR_WWPN_OFFSET;
3431 if (hw->eeprom.ops.read(hw, offset, wwpn_prefix))
3432 goto wwn_prefix_err;
3433
3434 return 0;
3435
3436wwn_prefix_err:
3437 hw_err(hw, "eeprom read at offset %d failed\n", offset);
3438 return 0;
3439}
3440
3441/**
3442 * ixgbe_set_mac_anti_spoofing - Enable/Disable MAC anti-spoofing
3443 * @hw: pointer to hardware structure
3444 * @enable: enable or disable switch for MAC anti-spoofing
3445 * @vf: Virtual Function pool - VF Pool to set for MAC anti-spoofing
3446 *
3447 **/
3448void ixgbe_set_mac_anti_spoofing(struct ixgbe_hw *hw, bool enable, int vf)
3449{
3450 int vf_target_reg = vf >> 3;
3451 int vf_target_shift = vf % 8;
3452 u32 pfvfspoof;
3453
3454 if (hw->mac.type == ixgbe_mac_82598EB)
3455 return;
3456
3457 pfvfspoof = IXGBE_READ_REG(hw, IXGBE_PFVFSPOOF(vf_target_reg));
3458 if (enable)
3459 pfvfspoof |= BIT(vf_target_shift);
3460 else
3461 pfvfspoof &= ~BIT(vf_target_shift);
3462 IXGBE_WRITE_REG(hw, IXGBE_PFVFSPOOF(vf_target_reg), pfvfspoof);
3463}
3464
3465/**
3466 * ixgbe_set_vlan_anti_spoofing - Enable/Disable VLAN anti-spoofing
3467 * @hw: pointer to hardware structure
3468 * @enable: enable or disable switch for VLAN anti-spoofing
3469 * @vf: Virtual Function pool - VF Pool to set for VLAN anti-spoofing
3470 *
3471 **/
3472void ixgbe_set_vlan_anti_spoofing(struct ixgbe_hw *hw, bool enable, int vf)
3473{
3474 int vf_target_reg = vf >> 3;
3475 int vf_target_shift = vf % 8 + IXGBE_SPOOF_VLANAS_SHIFT;
3476 u32 pfvfspoof;
3477
3478 if (hw->mac.type == ixgbe_mac_82598EB)
3479 return;
3480
3481 pfvfspoof = IXGBE_READ_REG(hw, IXGBE_PFVFSPOOF(vf_target_reg));
3482 if (enable)
3483 pfvfspoof |= BIT(vf_target_shift);
3484 else
3485 pfvfspoof &= ~BIT(vf_target_shift);
3486 IXGBE_WRITE_REG(hw, IXGBE_PFVFSPOOF(vf_target_reg), pfvfspoof);
3487}
3488
3489/**
3490 * ixgbe_get_device_caps_generic - Get additional device capabilities
3491 * @hw: pointer to hardware structure
3492 * @device_caps: the EEPROM word with the extra device capabilities
3493 *
3494 * This function will read the EEPROM location for the device capabilities,
3495 * and return the word through device_caps.
3496 **/
3497s32 ixgbe_get_device_caps_generic(struct ixgbe_hw *hw, u16 *device_caps)
3498{
3499 hw->eeprom.ops.read(hw, IXGBE_DEVICE_CAPS, device_caps);
3500
3501 return 0;
3502}
3503
3504/**
3505 * ixgbe_set_rxpba_generic - Initialize RX packet buffer
3506 * @hw: pointer to hardware structure
3507 * @num_pb: number of packet buffers to allocate
3508 * @headroom: reserve n KB of headroom
3509 * @strategy: packet buffer allocation strategy
3510 **/
3511void ixgbe_set_rxpba_generic(struct ixgbe_hw *hw,
3512 int num_pb,
3513 u32 headroom,
3514 int strategy)
3515{
3516 u32 pbsize = hw->mac.rx_pb_size;
3517 int i = 0;
3518 u32 rxpktsize, txpktsize, txpbthresh;
3519
3520 /* Reserve headroom */
3521 pbsize -= headroom;
3522
3523 if (!num_pb)
3524 num_pb = 1;
3525
3526 /* Divide remaining packet buffer space amongst the number
3527 * of packet buffers requested using supplied strategy.
3528 */
3529 switch (strategy) {
3530 case (PBA_STRATEGY_WEIGHTED):
3531 /* pba_80_48 strategy weight first half of packet buffer with
3532 * 5/8 of the packet buffer space.
3533 */
3534 rxpktsize = ((pbsize * 5 * 2) / (num_pb * 8));
3535 pbsize -= rxpktsize * (num_pb / 2);
3536 rxpktsize <<= IXGBE_RXPBSIZE_SHIFT;
3537 for (; i < (num_pb / 2); i++)
3538 IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), rxpktsize);
3539 fallthrough; /* configure remaining packet buffers */
3540 case (PBA_STRATEGY_EQUAL):
3541 /* Divide the remaining Rx packet buffer evenly among the TCs */
3542 rxpktsize = (pbsize / (num_pb - i)) << IXGBE_RXPBSIZE_SHIFT;
3543 for (; i < num_pb; i++)
3544 IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), rxpktsize);
3545 break;
3546 default:
3547 break;
3548 }
3549
3550 /*
3551 * Setup Tx packet buffer and threshold equally for all TCs
3552 * TXPBTHRESH register is set in K so divide by 1024 and subtract
3553 * 10 since the largest packet we support is just over 9K.
3554 */
3555 txpktsize = IXGBE_TXPBSIZE_MAX / num_pb;
3556 txpbthresh = (txpktsize / 1024) - IXGBE_TXPKT_SIZE_MAX;
3557 for (i = 0; i < num_pb; i++) {
3558 IXGBE_WRITE_REG(hw, IXGBE_TXPBSIZE(i), txpktsize);
3559 IXGBE_WRITE_REG(hw, IXGBE_TXPBTHRESH(i), txpbthresh);
3560 }
3561
3562 /* Clear unused TCs, if any, to zero buffer size*/
3563 for (; i < IXGBE_MAX_PB; i++) {
3564 IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), 0);
3565 IXGBE_WRITE_REG(hw, IXGBE_TXPBSIZE(i), 0);
3566 IXGBE_WRITE_REG(hw, IXGBE_TXPBTHRESH(i), 0);
3567 }
3568}
3569
3570/**
3571 * ixgbe_calculate_checksum - Calculate checksum for buffer
3572 * @buffer: pointer to EEPROM
3573 * @length: size of EEPROM to calculate a checksum for
3574 *
3575 * Calculates the checksum for some buffer on a specified length. The
3576 * checksum calculated is returned.
3577 **/
3578u8 ixgbe_calculate_checksum(u8 *buffer, u32 length)
3579{
3580 u32 i;
3581 u8 sum = 0;
3582
3583 if (!buffer)
3584 return 0;
3585
3586 for (i = 0; i < length; i++)
3587 sum += buffer[i];
3588
3589 return (u8) (0 - sum);
3590}
3591
3592/**
3593 * ixgbe_hic_unlocked - Issue command to manageability block unlocked
3594 * @hw: pointer to the HW structure
3595 * @buffer: command to write and where the return status will be placed
3596 * @length: length of buffer, must be multiple of 4 bytes
3597 * @timeout: time in ms to wait for command completion
3598 *
3599 * Communicates with the manageability block. On success return 0
3600 * else returns semaphore error when encountering an error acquiring
3601 * semaphore, -EINVAL when incorrect parameters passed or -EIO when
3602 * command fails.
3603 *
3604 * This function assumes that the IXGBE_GSSR_SW_MNG_SM semaphore is held
3605 * by the caller.
3606 **/
3607s32 ixgbe_hic_unlocked(struct ixgbe_hw *hw, u32 *buffer, u32 length,
3608 u32 timeout)
3609{
3610 u32 hicr, i, fwsts;
3611 u16 dword_len;
3612
3613 if (!length || length > IXGBE_HI_MAX_BLOCK_BYTE_LENGTH) {
3614 hw_dbg(hw, "Buffer length failure buffersize-%d.\n", length);
3615 return -EINVAL;
3616 }
3617
3618 /* Set bit 9 of FWSTS clearing FW reset indication */
3619 fwsts = IXGBE_READ_REG(hw, IXGBE_FWSTS);
3620 IXGBE_WRITE_REG(hw, IXGBE_FWSTS, fwsts | IXGBE_FWSTS_FWRI);
3621
3622 /* Check that the host interface is enabled. */
3623 hicr = IXGBE_READ_REG(hw, IXGBE_HICR);
3624 if (!(hicr & IXGBE_HICR_EN)) {
3625 hw_dbg(hw, "IXGBE_HOST_EN bit disabled.\n");
3626 return -EIO;
3627 }
3628
3629 /* Calculate length in DWORDs. We must be DWORD aligned */
3630 if (length % sizeof(u32)) {
3631 hw_dbg(hw, "Buffer length failure, not aligned to dword");
3632 return -EINVAL;
3633 }
3634
3635 dword_len = length >> 2;
3636
3637 /* The device driver writes the relevant command block
3638 * into the ram area.
3639 */
3640 for (i = 0; i < dword_len; i++)
3641 IXGBE_WRITE_REG_ARRAY(hw, IXGBE_FLEX_MNG,
3642 i, (__force u32)cpu_to_le32(buffer[i]));
3643
3644 /* Setting this bit tells the ARC that a new command is pending. */
3645 IXGBE_WRITE_REG(hw, IXGBE_HICR, hicr | IXGBE_HICR_C);
3646
3647 for (i = 0; i < timeout; i++) {
3648 hicr = IXGBE_READ_REG(hw, IXGBE_HICR);
3649 if (!(hicr & IXGBE_HICR_C))
3650 break;
3651 usleep_range(1000, 2000);
3652 }
3653
3654 /* Check command successful completion. */
3655 if ((timeout && i == timeout) ||
3656 !(IXGBE_READ_REG(hw, IXGBE_HICR) & IXGBE_HICR_SV))
3657 return -EIO;
3658
3659 return 0;
3660}
3661
3662/**
3663 * ixgbe_host_interface_command - Issue command to manageability block
3664 * @hw: pointer to the HW structure
3665 * @buffer: contains the command to write and where the return status will
3666 * be placed
3667 * @length: length of buffer, must be multiple of 4 bytes
3668 * @timeout: time in ms to wait for command completion
3669 * @return_data: read and return data from the buffer (true) or not (false)
3670 * Needed because FW structures are big endian and decoding of
3671 * these fields can be 8 bit or 16 bit based on command. Decoding
3672 * is not easily understood without making a table of commands.
3673 * So we will leave this up to the caller to read back the data
3674 * in these cases.
3675 *
3676 * Communicates with the manageability block. On success return 0
3677 * else return -EIO or -EINVAL.
3678 **/
3679s32 ixgbe_host_interface_command(struct ixgbe_hw *hw, void *buffer,
3680 u32 length, u32 timeout,
3681 bool return_data)
3682{
3683 u32 hdr_size = sizeof(struct ixgbe_hic_hdr);
3684 struct ixgbe_hic_hdr *hdr = buffer;
3685 u32 *u32arr = buffer;
3686 u16 buf_len, dword_len;
3687 s32 status;
3688 u32 bi;
3689
3690 if (!length || length > IXGBE_HI_MAX_BLOCK_BYTE_LENGTH) {
3691 hw_dbg(hw, "Buffer length failure buffersize-%d.\n", length);
3692 return -EINVAL;
3693 }
3694 /* Take management host interface semaphore */
3695 status = hw->mac.ops.acquire_swfw_sync(hw, IXGBE_GSSR_SW_MNG_SM);
3696 if (status)
3697 return status;
3698
3699 status = ixgbe_hic_unlocked(hw, buffer, length, timeout);
3700 if (status)
3701 goto rel_out;
3702
3703 if (!return_data)
3704 goto rel_out;
3705
3706 /* Calculate length in DWORDs */
3707 dword_len = hdr_size >> 2;
3708
3709 /* first pull in the header so we know the buffer length */
3710 for (bi = 0; bi < dword_len; bi++) {
3711 u32arr[bi] = IXGBE_READ_REG_ARRAY(hw, IXGBE_FLEX_MNG, bi);
3712 le32_to_cpus(&u32arr[bi]);
3713 }
3714
3715 /* If there is any thing in data position pull it in */
3716 buf_len = hdr->buf_len;
3717 if (!buf_len)
3718 goto rel_out;
3719
3720 if (length < round_up(buf_len, 4) + hdr_size) {
3721 hw_dbg(hw, "Buffer not large enough for reply message.\n");
3722 status = -EIO;
3723 goto rel_out;
3724 }
3725
3726 /* Calculate length in DWORDs, add 3 for odd lengths */
3727 dword_len = (buf_len + 3) >> 2;
3728
3729 /* Pull in the rest of the buffer (bi is where we left off) */
3730 for (; bi <= dword_len; bi++) {
3731 u32arr[bi] = IXGBE_READ_REG_ARRAY(hw, IXGBE_FLEX_MNG, bi);
3732 le32_to_cpus(&u32arr[bi]);
3733 }
3734
3735rel_out:
3736 hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_SW_MNG_SM);
3737
3738 return status;
3739}
3740
3741/**
3742 * ixgbe_set_fw_drv_ver_generic - Sends driver version to firmware
3743 * @hw: pointer to the HW structure
3744 * @maj: driver version major number
3745 * @min: driver version minor number
3746 * @build: driver version build number
3747 * @sub: driver version sub build number
3748 * @len: length of driver_ver string
3749 * @driver_ver: driver string
3750 *
3751 * Sends driver version number to firmware through the manageability
3752 * block. On success return 0
3753 * else returns -EBUSY when encountering an error acquiring
3754 * semaphore or -EIO when command fails.
3755 **/
3756s32 ixgbe_set_fw_drv_ver_generic(struct ixgbe_hw *hw, u8 maj, u8 min,
3757 u8 build, u8 sub, __always_unused u16 len,
3758 __always_unused const char *driver_ver)
3759{
3760 struct ixgbe_hic_drv_info fw_cmd;
3761 int i;
3762 s32 ret_val;
3763
3764 fw_cmd.hdr.cmd = FW_CEM_CMD_DRIVER_INFO;
3765 fw_cmd.hdr.buf_len = FW_CEM_CMD_DRIVER_INFO_LEN;
3766 fw_cmd.hdr.cmd_or_resp.cmd_resv = FW_CEM_CMD_RESERVED;
3767 fw_cmd.port_num = hw->bus.func;
3768 fw_cmd.ver_maj = maj;
3769 fw_cmd.ver_min = min;
3770 fw_cmd.ver_build = build;
3771 fw_cmd.ver_sub = sub;
3772 fw_cmd.hdr.checksum = 0;
3773 fw_cmd.pad = 0;
3774 fw_cmd.pad2 = 0;
3775 fw_cmd.hdr.checksum = ixgbe_calculate_checksum((u8 *)&fw_cmd,
3776 (FW_CEM_HDR_LEN + fw_cmd.hdr.buf_len));
3777
3778 for (i = 0; i <= FW_CEM_MAX_RETRIES; i++) {
3779 ret_val = ixgbe_host_interface_command(hw, &fw_cmd,
3780 sizeof(fw_cmd),
3781 IXGBE_HI_COMMAND_TIMEOUT,
3782 true);
3783 if (ret_val != 0)
3784 continue;
3785
3786 if (fw_cmd.hdr.cmd_or_resp.ret_status ==
3787 FW_CEM_RESP_STATUS_SUCCESS)
3788 ret_val = 0;
3789 else
3790 ret_val = -EIO;
3791
3792 break;
3793 }
3794
3795 return ret_val;
3796}
3797
3798/**
3799 * ixgbe_clear_tx_pending - Clear pending TX work from the PCIe fifo
3800 * @hw: pointer to the hardware structure
3801 *
3802 * The 82599 and x540 MACs can experience issues if TX work is still pending
3803 * when a reset occurs. This function prevents this by flushing the PCIe
3804 * buffers on the system.
3805 **/
3806void ixgbe_clear_tx_pending(struct ixgbe_hw *hw)
3807{
3808 u32 gcr_ext, hlreg0, i, poll;
3809 u16 value;
3810
3811 /*
3812 * If double reset is not requested then all transactions should
3813 * already be clear and as such there is no work to do
3814 */
3815 if (!(hw->mac.flags & IXGBE_FLAGS_DOUBLE_RESET_REQUIRED))
3816 return;
3817
3818 /*
3819 * Set loopback enable to prevent any transmits from being sent
3820 * should the link come up. This assumes that the RXCTRL.RXEN bit
3821 * has already been cleared.
3822 */
3823 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
3824 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0 | IXGBE_HLREG0_LPBK);
3825
3826 /* wait for a last completion before clearing buffers */
3827 IXGBE_WRITE_FLUSH(hw);
3828 usleep_range(3000, 6000);
3829
3830 /* Before proceeding, make sure that the PCIe block does not have
3831 * transactions pending.
3832 */
3833 poll = ixgbe_pcie_timeout_poll(hw);
3834 for (i = 0; i < poll; i++) {
3835 usleep_range(100, 200);
3836 value = ixgbe_read_pci_cfg_word(hw, IXGBE_PCI_DEVICE_STATUS);
3837 if (ixgbe_removed(hw->hw_addr))
3838 break;
3839 if (!(value & IXGBE_PCI_DEVICE_STATUS_TRANSACTION_PENDING))
3840 break;
3841 }
3842
3843 /* initiate cleaning flow for buffers in the PCIe transaction layer */
3844 gcr_ext = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
3845 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT,
3846 gcr_ext | IXGBE_GCR_EXT_BUFFERS_CLEAR);
3847
3848 /* Flush all writes and allow 20usec for all transactions to clear */
3849 IXGBE_WRITE_FLUSH(hw);
3850 udelay(20);
3851
3852 /* restore previous register values */
3853 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);
3854 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
3855}
3856
3857static const u8 ixgbe_emc_temp_data[4] = {
3858 IXGBE_EMC_INTERNAL_DATA,
3859 IXGBE_EMC_DIODE1_DATA,
3860 IXGBE_EMC_DIODE2_DATA,
3861 IXGBE_EMC_DIODE3_DATA
3862};
3863static const u8 ixgbe_emc_therm_limit[4] = {
3864 IXGBE_EMC_INTERNAL_THERM_LIMIT,
3865 IXGBE_EMC_DIODE1_THERM_LIMIT,
3866 IXGBE_EMC_DIODE2_THERM_LIMIT,
3867 IXGBE_EMC_DIODE3_THERM_LIMIT
3868};
3869
3870/**
3871 * ixgbe_get_ets_data - Extracts the ETS bit data
3872 * @hw: pointer to hardware structure
3873 * @ets_cfg: extected ETS data
3874 * @ets_offset: offset of ETS data
3875 *
3876 * Returns error code.
3877 **/
3878static s32 ixgbe_get_ets_data(struct ixgbe_hw *hw, u16 *ets_cfg,
3879 u16 *ets_offset)
3880{
3881 s32 status;
3882
3883 status = hw->eeprom.ops.read(hw, IXGBE_ETS_CFG, ets_offset);
3884 if (status)
3885 return status;
3886
3887 if ((*ets_offset == 0x0000) || (*ets_offset == 0xFFFF))
3888 return -EOPNOTSUPP;
3889
3890 status = hw->eeprom.ops.read(hw, *ets_offset, ets_cfg);
3891 if (status)
3892 return status;
3893
3894 if ((*ets_cfg & IXGBE_ETS_TYPE_MASK) != IXGBE_ETS_TYPE_EMC_SHIFTED)
3895 return -EOPNOTSUPP;
3896
3897 return 0;
3898}
3899
3900/**
3901 * ixgbe_get_thermal_sensor_data_generic - Gathers thermal sensor data
3902 * @hw: pointer to hardware structure
3903 *
3904 * Returns the thermal sensor data structure
3905 **/
3906s32 ixgbe_get_thermal_sensor_data_generic(struct ixgbe_hw *hw)
3907{
3908 s32 status;
3909 u16 ets_offset;
3910 u16 ets_cfg;
3911 u16 ets_sensor;
3912 u8 num_sensors;
3913 u8 i;
3914 struct ixgbe_thermal_sensor_data *data = &hw->mac.thermal_sensor_data;
3915
3916 /* Only support thermal sensors attached to physical port 0 */
3917 if ((IXGBE_READ_REG(hw, IXGBE_STATUS) & IXGBE_STATUS_LAN_ID_1))
3918 return -EOPNOTSUPP;
3919
3920 status = ixgbe_get_ets_data(hw, &ets_cfg, &ets_offset);
3921 if (status)
3922 return status;
3923
3924 num_sensors = (ets_cfg & IXGBE_ETS_NUM_SENSORS_MASK);
3925 if (num_sensors > IXGBE_MAX_SENSORS)
3926 num_sensors = IXGBE_MAX_SENSORS;
3927
3928 for (i = 0; i < num_sensors; i++) {
3929 u8 sensor_index;
3930 u8 sensor_location;
3931
3932 status = hw->eeprom.ops.read(hw, (ets_offset + 1 + i),
3933 &ets_sensor);
3934 if (status)
3935 return status;
3936
3937 sensor_index = FIELD_GET(IXGBE_ETS_DATA_INDEX_MASK,
3938 ets_sensor);
3939 sensor_location = FIELD_GET(IXGBE_ETS_DATA_LOC_MASK,
3940 ets_sensor);
3941
3942 if (sensor_location != 0) {
3943 status = hw->phy.ops.read_i2c_byte(hw,
3944 ixgbe_emc_temp_data[sensor_index],
3945 IXGBE_I2C_THERMAL_SENSOR_ADDR,
3946 &data->sensor[i].temp);
3947 if (status)
3948 return status;
3949 }
3950 }
3951
3952 return 0;
3953}
3954
3955/**
3956 * ixgbe_init_thermal_sensor_thresh_generic - Inits thermal sensor thresholds
3957 * @hw: pointer to hardware structure
3958 *
3959 * Inits the thermal sensor thresholds according to the NVM map
3960 * and save off the threshold and location values into mac.thermal_sensor_data
3961 **/
3962s32 ixgbe_init_thermal_sensor_thresh_generic(struct ixgbe_hw *hw)
3963{
3964 s32 status;
3965 u16 ets_offset;
3966 u16 ets_cfg;
3967 u16 ets_sensor;
3968 u8 low_thresh_delta;
3969 u8 num_sensors;
3970 u8 therm_limit;
3971 u8 i;
3972 struct ixgbe_thermal_sensor_data *data = &hw->mac.thermal_sensor_data;
3973
3974 memset(data, 0, sizeof(struct ixgbe_thermal_sensor_data));
3975
3976 /* Only support thermal sensors attached to physical port 0 */
3977 if ((IXGBE_READ_REG(hw, IXGBE_STATUS) & IXGBE_STATUS_LAN_ID_1))
3978 return -EOPNOTSUPP;
3979
3980 status = ixgbe_get_ets_data(hw, &ets_cfg, &ets_offset);
3981 if (status)
3982 return status;
3983
3984 low_thresh_delta = FIELD_GET(IXGBE_ETS_LTHRES_DELTA_MASK, ets_cfg);
3985 num_sensors = (ets_cfg & IXGBE_ETS_NUM_SENSORS_MASK);
3986 if (num_sensors > IXGBE_MAX_SENSORS)
3987 num_sensors = IXGBE_MAX_SENSORS;
3988
3989 for (i = 0; i < num_sensors; i++) {
3990 u8 sensor_index;
3991 u8 sensor_location;
3992
3993 if (hw->eeprom.ops.read(hw, ets_offset + 1 + i, &ets_sensor)) {
3994 hw_err(hw, "eeprom read at offset %d failed\n",
3995 ets_offset + 1 + i);
3996 continue;
3997 }
3998 sensor_index = FIELD_GET(IXGBE_ETS_DATA_INDEX_MASK,
3999 ets_sensor);
4000 sensor_location = FIELD_GET(IXGBE_ETS_DATA_LOC_MASK,
4001 ets_sensor);
4002 therm_limit = ets_sensor & IXGBE_ETS_DATA_HTHRESH_MASK;
4003
4004 hw->phy.ops.write_i2c_byte(hw,
4005 ixgbe_emc_therm_limit[sensor_index],
4006 IXGBE_I2C_THERMAL_SENSOR_ADDR, therm_limit);
4007
4008 if (sensor_location == 0)
4009 continue;
4010
4011 data->sensor[i].location = sensor_location;
4012 data->sensor[i].caution_thresh = therm_limit;
4013 data->sensor[i].max_op_thresh = therm_limit - low_thresh_delta;
4014 }
4015
4016 return 0;
4017}
4018
4019/**
4020 * ixgbe_get_orom_version - Return option ROM from EEPROM
4021 *
4022 * @hw: pointer to hardware structure
4023 * @nvm_ver: pointer to output structure
4024 *
4025 * if valid option ROM version, nvm_ver->or_valid set to true
4026 * else nvm_ver->or_valid is false.
4027 **/
4028void ixgbe_get_orom_version(struct ixgbe_hw *hw,
4029 struct ixgbe_nvm_version *nvm_ver)
4030{
4031 u16 offset, eeprom_cfg_blkh, eeprom_cfg_blkl;
4032
4033 nvm_ver->or_valid = false;
4034 /* Option Rom may or may not be present. Start with pointer */
4035 hw->eeprom.ops.read(hw, NVM_OROM_OFFSET, &offset);
4036
4037 /* make sure offset is valid */
4038 if (offset == 0x0 || offset == NVM_INVALID_PTR)
4039 return;
4040
4041 hw->eeprom.ops.read(hw, offset + NVM_OROM_BLK_HI, &eeprom_cfg_blkh);
4042 hw->eeprom.ops.read(hw, offset + NVM_OROM_BLK_LOW, &eeprom_cfg_blkl);
4043
4044 /* option rom exists and is valid */
4045 if ((eeprom_cfg_blkl | eeprom_cfg_blkh) == 0x0 ||
4046 eeprom_cfg_blkl == NVM_VER_INVALID ||
4047 eeprom_cfg_blkh == NVM_VER_INVALID)
4048 return;
4049
4050 nvm_ver->or_valid = true;
4051 nvm_ver->or_major = eeprom_cfg_blkl >> NVM_OROM_SHIFT;
4052 nvm_ver->or_build = (eeprom_cfg_blkl << NVM_OROM_SHIFT) |
4053 (eeprom_cfg_blkh >> NVM_OROM_SHIFT);
4054 nvm_ver->or_patch = eeprom_cfg_blkh & NVM_OROM_PATCH_MASK;
4055}
4056
4057/**
4058 * ixgbe_get_oem_prod_version - Etrack ID from EEPROM
4059 * @hw: pointer to hardware structure
4060 * @nvm_ver: pointer to output structure
4061 *
4062 * if valid OEM product version, nvm_ver->oem_valid set to true
4063 * else nvm_ver->oem_valid is false.
4064 **/
4065void ixgbe_get_oem_prod_version(struct ixgbe_hw *hw,
4066 struct ixgbe_nvm_version *nvm_ver)
4067{
4068 u16 rel_num, prod_ver, mod_len, cap, offset;
4069
4070 nvm_ver->oem_valid = false;
4071 hw->eeprom.ops.read(hw, NVM_OEM_PROD_VER_PTR, &offset);
4072
4073 /* Return is offset to OEM Product Version block is invalid */
4074 if (offset == 0x0 || offset == NVM_INVALID_PTR)
4075 return;
4076
4077 /* Read product version block */
4078 hw->eeprom.ops.read(hw, offset, &mod_len);
4079 hw->eeprom.ops.read(hw, offset + NVM_OEM_PROD_VER_CAP_OFF, &cap);
4080
4081 /* Return if OEM product version block is invalid */
4082 if (mod_len != NVM_OEM_PROD_VER_MOD_LEN ||
4083 (cap & NVM_OEM_PROD_VER_CAP_MASK) != 0x0)
4084 return;
4085
4086 hw->eeprom.ops.read(hw, offset + NVM_OEM_PROD_VER_OFF_L, &prod_ver);
4087 hw->eeprom.ops.read(hw, offset + NVM_OEM_PROD_VER_OFF_H, &rel_num);
4088
4089 /* Return if version is invalid */
4090 if ((rel_num | prod_ver) == 0x0 ||
4091 rel_num == NVM_VER_INVALID || prod_ver == NVM_VER_INVALID)
4092 return;
4093
4094 nvm_ver->oem_major = prod_ver >> NVM_VER_SHIFT;
4095 nvm_ver->oem_minor = prod_ver & NVM_VER_MASK;
4096 nvm_ver->oem_release = rel_num;
4097 nvm_ver->oem_valid = true;
4098}
4099
4100/**
4101 * ixgbe_get_etk_id - Return Etrack ID from EEPROM
4102 *
4103 * @hw: pointer to hardware structure
4104 * @nvm_ver: pointer to output structure
4105 *
4106 * word read errors will return 0xFFFF
4107 **/
4108void ixgbe_get_etk_id(struct ixgbe_hw *hw,
4109 struct ixgbe_nvm_version *nvm_ver)
4110{
4111 u16 etk_id_l, etk_id_h;
4112
4113 if (hw->eeprom.ops.read(hw, NVM_ETK_OFF_LOW, &etk_id_l))
4114 etk_id_l = NVM_VER_INVALID;
4115 if (hw->eeprom.ops.read(hw, NVM_ETK_OFF_HI, &etk_id_h))
4116 etk_id_h = NVM_VER_INVALID;
4117
4118 /* The word order for the version format is determined by high order
4119 * word bit 15.
4120 */
4121 if ((etk_id_h & NVM_ETK_VALID) == 0) {
4122 nvm_ver->etk_id = etk_id_h;
4123 nvm_ver->etk_id |= (etk_id_l << NVM_ETK_SHIFT);
4124 } else {
4125 nvm_ver->etk_id = etk_id_l;
4126 nvm_ver->etk_id |= (etk_id_h << NVM_ETK_SHIFT);
4127 }
4128}
4129
4130void ixgbe_disable_rx_generic(struct ixgbe_hw *hw)
4131{
4132 u32 rxctrl;
4133
4134 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
4135 if (rxctrl & IXGBE_RXCTRL_RXEN) {
4136 if (hw->mac.type != ixgbe_mac_82598EB) {
4137 u32 pfdtxgswc;
4138
4139 pfdtxgswc = IXGBE_READ_REG(hw, IXGBE_PFDTXGSWC);
4140 if (pfdtxgswc & IXGBE_PFDTXGSWC_VT_LBEN) {
4141 pfdtxgswc &= ~IXGBE_PFDTXGSWC_VT_LBEN;
4142 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, pfdtxgswc);
4143 hw->mac.set_lben = true;
4144 } else {
4145 hw->mac.set_lben = false;
4146 }
4147 }
4148 rxctrl &= ~IXGBE_RXCTRL_RXEN;
4149 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl);
4150 }
4151}
4152
4153void ixgbe_enable_rx_generic(struct ixgbe_hw *hw)
4154{
4155 u32 rxctrl;
4156
4157 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
4158 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, (rxctrl | IXGBE_RXCTRL_RXEN));
4159
4160 if (hw->mac.type != ixgbe_mac_82598EB) {
4161 if (hw->mac.set_lben) {
4162 u32 pfdtxgswc;
4163
4164 pfdtxgswc = IXGBE_READ_REG(hw, IXGBE_PFDTXGSWC);
4165 pfdtxgswc |= IXGBE_PFDTXGSWC_VT_LBEN;
4166 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, pfdtxgswc);
4167 hw->mac.set_lben = false;
4168 }
4169 }
4170}
4171
4172/** ixgbe_mng_present - returns true when management capability is present
4173 * @hw: pointer to hardware structure
4174 **/
4175bool ixgbe_mng_present(struct ixgbe_hw *hw)
4176{
4177 u32 fwsm;
4178
4179 if (hw->mac.type < ixgbe_mac_82599EB)
4180 return false;
4181
4182 fwsm = IXGBE_READ_REG(hw, IXGBE_FWSM(hw));
4183
4184 return !!(fwsm & IXGBE_FWSM_FW_MODE_PT);
4185}
4186
4187/**
4188 * ixgbe_setup_mac_link_multispeed_fiber - Set MAC link speed
4189 * @hw: pointer to hardware structure
4190 * @speed: new link speed
4191 * @autoneg_wait_to_complete: true when waiting for completion is needed
4192 *
4193 * Set the link speed in the MAC and/or PHY register and restarts link.
4194 */
4195s32 ixgbe_setup_mac_link_multispeed_fiber(struct ixgbe_hw *hw,
4196 ixgbe_link_speed speed,
4197 bool autoneg_wait_to_complete)
4198{
4199 ixgbe_link_speed link_speed = IXGBE_LINK_SPEED_UNKNOWN;
4200 ixgbe_link_speed highest_link_speed = IXGBE_LINK_SPEED_UNKNOWN;
4201 s32 status = 0;
4202 u32 speedcnt = 0;
4203 u32 i = 0;
4204 bool autoneg, link_up = false;
4205
4206 /* Mask off requested but non-supported speeds */
4207 status = hw->mac.ops.get_link_capabilities(hw, &link_speed, &autoneg);
4208 if (status)
4209 return status;
4210
4211 speed &= link_speed;
4212
4213 /* Try each speed one by one, highest priority first. We do this in
4214 * software because 10Gb fiber doesn't support speed autonegotiation.
4215 */
4216 if (speed & IXGBE_LINK_SPEED_10GB_FULL) {
4217 speedcnt++;
4218 highest_link_speed = IXGBE_LINK_SPEED_10GB_FULL;
4219
4220 /* Set the module link speed */
4221 switch (hw->phy.media_type) {
4222 case ixgbe_media_type_fiber:
4223 hw->mac.ops.set_rate_select_speed(hw,
4224 IXGBE_LINK_SPEED_10GB_FULL);
4225 break;
4226 case ixgbe_media_type_fiber_qsfp:
4227 /* QSFP module automatically detects MAC link speed */
4228 break;
4229 default:
4230 hw_dbg(hw, "Unexpected media type\n");
4231 break;
4232 }
4233
4234 /* Allow module to change analog characteristics (1G->10G) */
4235 msleep(40);
4236
4237 status = hw->mac.ops.setup_mac_link(hw,
4238 IXGBE_LINK_SPEED_10GB_FULL,
4239 autoneg_wait_to_complete);
4240 if (status)
4241 return status;
4242
4243 /* Flap the Tx laser if it has not already been done */
4244 if (hw->mac.ops.flap_tx_laser)
4245 hw->mac.ops.flap_tx_laser(hw);
4246
4247 /* Wait for the controller to acquire link. Per IEEE 802.3ap,
4248 * Section 73.10.2, we may have to wait up to 500ms if KR is
4249 * attempted. 82599 uses the same timing for 10g SFI.
4250 */
4251 for (i = 0; i < 5; i++) {
4252 /* Wait for the link partner to also set speed */
4253 msleep(100);
4254
4255 /* If we have link, just jump out */
4256 status = hw->mac.ops.check_link(hw, &link_speed,
4257 &link_up, false);
4258 if (status)
4259 return status;
4260
4261 if (link_up)
4262 goto out;
4263 }
4264 }
4265
4266 if (speed & IXGBE_LINK_SPEED_1GB_FULL) {
4267 speedcnt++;
4268 if (highest_link_speed == IXGBE_LINK_SPEED_UNKNOWN)
4269 highest_link_speed = IXGBE_LINK_SPEED_1GB_FULL;
4270
4271 /* Set the module link speed */
4272 switch (hw->phy.media_type) {
4273 case ixgbe_media_type_fiber:
4274 hw->mac.ops.set_rate_select_speed(hw,
4275 IXGBE_LINK_SPEED_1GB_FULL);
4276 break;
4277 case ixgbe_media_type_fiber_qsfp:
4278 /* QSFP module automatically detects link speed */
4279 break;
4280 default:
4281 hw_dbg(hw, "Unexpected media type\n");
4282 break;
4283 }
4284
4285 /* Allow module to change analog characteristics (10G->1G) */
4286 msleep(40);
4287
4288 status = hw->mac.ops.setup_mac_link(hw,
4289 IXGBE_LINK_SPEED_1GB_FULL,
4290 autoneg_wait_to_complete);
4291 if (status)
4292 return status;
4293
4294 /* Flap the Tx laser if it has not already been done */
4295 if (hw->mac.ops.flap_tx_laser)
4296 hw->mac.ops.flap_tx_laser(hw);
4297
4298 /* Wait for the link partner to also set speed */
4299 msleep(100);
4300
4301 /* If we have link, just jump out */
4302 status = hw->mac.ops.check_link(hw, &link_speed, &link_up,
4303 false);
4304 if (status)
4305 return status;
4306
4307 if (link_up)
4308 goto out;
4309 }
4310
4311 /* We didn't get link. Configure back to the highest speed we tried,
4312 * (if there was more than one). We call ourselves back with just the
4313 * single highest speed that the user requested.
4314 */
4315 if (speedcnt > 1)
4316 status = ixgbe_setup_mac_link_multispeed_fiber(hw,
4317 highest_link_speed,
4318 autoneg_wait_to_complete);
4319
4320out:
4321 /* Set autoneg_advertised value based on input link speed */
4322 hw->phy.autoneg_advertised = 0;
4323
4324 if (speed & IXGBE_LINK_SPEED_10GB_FULL)
4325 hw->phy.autoneg_advertised |= IXGBE_LINK_SPEED_10GB_FULL;
4326
4327 if (speed & IXGBE_LINK_SPEED_1GB_FULL)
4328 hw->phy.autoneg_advertised |= IXGBE_LINK_SPEED_1GB_FULL;
4329
4330 return status;
4331}
4332
4333/**
4334 * ixgbe_set_soft_rate_select_speed - Set module link speed
4335 * @hw: pointer to hardware structure
4336 * @speed: link speed to set
4337 *
4338 * Set module link speed via the soft rate select.
4339 */
4340void ixgbe_set_soft_rate_select_speed(struct ixgbe_hw *hw,
4341 ixgbe_link_speed speed)
4342{
4343 s32 status;
4344 u8 rs, eeprom_data;
4345
4346 switch (speed) {
4347 case IXGBE_LINK_SPEED_10GB_FULL:
4348 /* one bit mask same as setting on */
4349 rs = IXGBE_SFF_SOFT_RS_SELECT_10G;
4350 break;
4351 case IXGBE_LINK_SPEED_1GB_FULL:
4352 rs = IXGBE_SFF_SOFT_RS_SELECT_1G;
4353 break;
4354 default:
4355 hw_dbg(hw, "Invalid fixed module speed\n");
4356 return;
4357 }
4358
4359 /* Set RS0 */
4360 status = hw->phy.ops.read_i2c_byte(hw, IXGBE_SFF_SFF_8472_OSCB,
4361 IXGBE_I2C_EEPROM_DEV_ADDR2,
4362 &eeprom_data);
4363 if (status) {
4364 hw_dbg(hw, "Failed to read Rx Rate Select RS0\n");
4365 return;
4366 }
4367
4368 eeprom_data = (eeprom_data & ~IXGBE_SFF_SOFT_RS_SELECT_MASK) | rs;
4369
4370 status = hw->phy.ops.write_i2c_byte(hw, IXGBE_SFF_SFF_8472_OSCB,
4371 IXGBE_I2C_EEPROM_DEV_ADDR2,
4372 eeprom_data);
4373 if (status) {
4374 hw_dbg(hw, "Failed to write Rx Rate Select RS0\n");
4375 return;
4376 }
4377
4378 /* Set RS1 */
4379 status = hw->phy.ops.read_i2c_byte(hw, IXGBE_SFF_SFF_8472_ESCB,
4380 IXGBE_I2C_EEPROM_DEV_ADDR2,
4381 &eeprom_data);
4382 if (status) {
4383 hw_dbg(hw, "Failed to read Rx Rate Select RS1\n");
4384 return;
4385 }
4386
4387 eeprom_data = (eeprom_data & ~IXGBE_SFF_SOFT_RS_SELECT_MASK) | rs;
4388
4389 status = hw->phy.ops.write_i2c_byte(hw, IXGBE_SFF_SFF_8472_ESCB,
4390 IXGBE_I2C_EEPROM_DEV_ADDR2,
4391 eeprom_data);
4392 if (status) {
4393 hw_dbg(hw, "Failed to write Rx Rate Select RS1\n");
4394 return;
4395 }
4396}
1/*******************************************************************************
2
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2012 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25
26*******************************************************************************/
27
28#include <linux/pci.h>
29#include <linux/delay.h>
30#include <linux/sched.h>
31#include <linux/netdevice.h>
32
33#include "ixgbe.h"
34#include "ixgbe_common.h"
35#include "ixgbe_phy.h"
36
37static s32 ixgbe_acquire_eeprom(struct ixgbe_hw *hw);
38static s32 ixgbe_get_eeprom_semaphore(struct ixgbe_hw *hw);
39static void ixgbe_release_eeprom_semaphore(struct ixgbe_hw *hw);
40static s32 ixgbe_ready_eeprom(struct ixgbe_hw *hw);
41static void ixgbe_standby_eeprom(struct ixgbe_hw *hw);
42static void ixgbe_shift_out_eeprom_bits(struct ixgbe_hw *hw, u16 data,
43 u16 count);
44static u16 ixgbe_shift_in_eeprom_bits(struct ixgbe_hw *hw, u16 count);
45static void ixgbe_raise_eeprom_clk(struct ixgbe_hw *hw, u32 *eec);
46static void ixgbe_lower_eeprom_clk(struct ixgbe_hw *hw, u32 *eec);
47static void ixgbe_release_eeprom(struct ixgbe_hw *hw);
48
49static s32 ixgbe_mta_vector(struct ixgbe_hw *hw, u8 *mc_addr);
50static s32 ixgbe_poll_eerd_eewr_done(struct ixgbe_hw *hw, u32 ee_reg);
51static s32 ixgbe_read_eeprom_buffer_bit_bang(struct ixgbe_hw *hw, u16 offset,
52 u16 words, u16 *data);
53static s32 ixgbe_write_eeprom_buffer_bit_bang(struct ixgbe_hw *hw, u16 offset,
54 u16 words, u16 *data);
55static s32 ixgbe_detect_eeprom_page_size_generic(struct ixgbe_hw *hw,
56 u16 offset);
57static s32 ixgbe_disable_pcie_master(struct ixgbe_hw *hw);
58
59/**
60 * ixgbe_device_supports_autoneg_fc - Check if phy supports autoneg flow
61 * control
62 * @hw: pointer to hardware structure
63 *
64 * There are several phys that do not support autoneg flow control. This
65 * function check the device id to see if the associated phy supports
66 * autoneg flow control.
67 **/
68static s32 ixgbe_device_supports_autoneg_fc(struct ixgbe_hw *hw)
69{
70
71 switch (hw->device_id) {
72 case IXGBE_DEV_ID_X540T:
73 return 0;
74 case IXGBE_DEV_ID_82599_T3_LOM:
75 return 0;
76 default:
77 return IXGBE_ERR_FC_NOT_SUPPORTED;
78 }
79}
80
81/**
82 * ixgbe_setup_fc - Set up flow control
83 * @hw: pointer to hardware structure
84 *
85 * Called at init time to set up flow control.
86 **/
87static s32 ixgbe_setup_fc(struct ixgbe_hw *hw)
88{
89 s32 ret_val = 0;
90 u32 reg = 0, reg_bp = 0;
91 u16 reg_cu = 0;
92
93 /*
94 * Validate the requested mode. Strict IEEE mode does not allow
95 * ixgbe_fc_rx_pause because it will cause us to fail at UNH.
96 */
97 if (hw->fc.strict_ieee && hw->fc.requested_mode == ixgbe_fc_rx_pause) {
98 hw_dbg(hw, "ixgbe_fc_rx_pause not valid in strict IEEE mode\n");
99 ret_val = IXGBE_ERR_INVALID_LINK_SETTINGS;
100 goto out;
101 }
102
103 /*
104 * 10gig parts do not have a word in the EEPROM to determine the
105 * default flow control setting, so we explicitly set it to full.
106 */
107 if (hw->fc.requested_mode == ixgbe_fc_default)
108 hw->fc.requested_mode = ixgbe_fc_full;
109
110 /*
111 * Set up the 1G and 10G flow control advertisement registers so the
112 * HW will be able to do fc autoneg once the cable is plugged in. If
113 * we link at 10G, the 1G advertisement is harmless and vice versa.
114 */
115 switch (hw->phy.media_type) {
116 case ixgbe_media_type_fiber:
117 case ixgbe_media_type_backplane:
118 reg = IXGBE_READ_REG(hw, IXGBE_PCS1GANA);
119 reg_bp = IXGBE_READ_REG(hw, IXGBE_AUTOC);
120 break;
121 case ixgbe_media_type_copper:
122 hw->phy.ops.read_reg(hw, MDIO_AN_ADVERTISE,
123 MDIO_MMD_AN, ®_cu);
124 break;
125 default:
126 break;
127 }
128
129 /*
130 * The possible values of fc.requested_mode are:
131 * 0: Flow control is completely disabled
132 * 1: Rx flow control is enabled (we can receive pause frames,
133 * but not send pause frames).
134 * 2: Tx flow control is enabled (we can send pause frames but
135 * we do not support receiving pause frames).
136 * 3: Both Rx and Tx flow control (symmetric) are enabled.
137 * other: Invalid.
138 */
139 switch (hw->fc.requested_mode) {
140 case ixgbe_fc_none:
141 /* Flow control completely disabled by software override. */
142 reg &= ~(IXGBE_PCS1GANA_SYM_PAUSE | IXGBE_PCS1GANA_ASM_PAUSE);
143 if (hw->phy.media_type == ixgbe_media_type_backplane)
144 reg_bp &= ~(IXGBE_AUTOC_SYM_PAUSE |
145 IXGBE_AUTOC_ASM_PAUSE);
146 else if (hw->phy.media_type == ixgbe_media_type_copper)
147 reg_cu &= ~(IXGBE_TAF_SYM_PAUSE | IXGBE_TAF_ASM_PAUSE);
148 break;
149 case ixgbe_fc_tx_pause:
150 /*
151 * Tx Flow control is enabled, and Rx Flow control is
152 * disabled by software override.
153 */
154 reg |= IXGBE_PCS1GANA_ASM_PAUSE;
155 reg &= ~IXGBE_PCS1GANA_SYM_PAUSE;
156 if (hw->phy.media_type == ixgbe_media_type_backplane) {
157 reg_bp |= IXGBE_AUTOC_ASM_PAUSE;
158 reg_bp &= ~IXGBE_AUTOC_SYM_PAUSE;
159 } else if (hw->phy.media_type == ixgbe_media_type_copper) {
160 reg_cu |= IXGBE_TAF_ASM_PAUSE;
161 reg_cu &= ~IXGBE_TAF_SYM_PAUSE;
162 }
163 break;
164 case ixgbe_fc_rx_pause:
165 /*
166 * Rx Flow control is enabled and Tx Flow control is
167 * disabled by software override. Since there really
168 * isn't a way to advertise that we are capable of RX
169 * Pause ONLY, we will advertise that we support both
170 * symmetric and asymmetric Rx PAUSE, as such we fall
171 * through to the fc_full statement. Later, we will
172 * disable the adapter's ability to send PAUSE frames.
173 */
174 case ixgbe_fc_full:
175 /* Flow control (both Rx and Tx) is enabled by SW override. */
176 reg |= IXGBE_PCS1GANA_SYM_PAUSE | IXGBE_PCS1GANA_ASM_PAUSE;
177 if (hw->phy.media_type == ixgbe_media_type_backplane)
178 reg_bp |= IXGBE_AUTOC_SYM_PAUSE |
179 IXGBE_AUTOC_ASM_PAUSE;
180 else if (hw->phy.media_type == ixgbe_media_type_copper)
181 reg_cu |= IXGBE_TAF_SYM_PAUSE | IXGBE_TAF_ASM_PAUSE;
182 break;
183 default:
184 hw_dbg(hw, "Flow control param set incorrectly\n");
185 ret_val = IXGBE_ERR_CONFIG;
186 goto out;
187 break;
188 }
189
190 if (hw->mac.type != ixgbe_mac_X540) {
191 /*
192 * Enable auto-negotiation between the MAC & PHY;
193 * the MAC will advertise clause 37 flow control.
194 */
195 IXGBE_WRITE_REG(hw, IXGBE_PCS1GANA, reg);
196 reg = IXGBE_READ_REG(hw, IXGBE_PCS1GLCTL);
197
198 /* Disable AN timeout */
199 if (hw->fc.strict_ieee)
200 reg &= ~IXGBE_PCS1GLCTL_AN_1G_TIMEOUT_EN;
201
202 IXGBE_WRITE_REG(hw, IXGBE_PCS1GLCTL, reg);
203 hw_dbg(hw, "Set up FC; PCS1GLCTL = 0x%08X\n", reg);
204 }
205
206 /*
207 * AUTOC restart handles negotiation of 1G and 10G on backplane
208 * and copper. There is no need to set the PCS1GCTL register.
209 *
210 */
211 if (hw->phy.media_type == ixgbe_media_type_backplane) {
212 reg_bp |= IXGBE_AUTOC_AN_RESTART;
213 IXGBE_WRITE_REG(hw, IXGBE_AUTOC, reg_bp);
214 } else if ((hw->phy.media_type == ixgbe_media_type_copper) &&
215 (ixgbe_device_supports_autoneg_fc(hw) == 0)) {
216 hw->phy.ops.write_reg(hw, MDIO_AN_ADVERTISE,
217 MDIO_MMD_AN, reg_cu);
218 }
219
220 hw_dbg(hw, "Set up FC; IXGBE_AUTOC = 0x%08X\n", reg);
221out:
222 return ret_val;
223}
224
225/**
226 * ixgbe_start_hw_generic - Prepare hardware for Tx/Rx
227 * @hw: pointer to hardware structure
228 *
229 * Starts the hardware by filling the bus info structure and media type, clears
230 * all on chip counters, initializes receive address registers, multicast
231 * table, VLAN filter table, calls routine to set up link and flow control
232 * settings, and leaves transmit and receive units disabled and uninitialized
233 **/
234s32 ixgbe_start_hw_generic(struct ixgbe_hw *hw)
235{
236 u32 ctrl_ext;
237
238 /* Set the media type */
239 hw->phy.media_type = hw->mac.ops.get_media_type(hw);
240
241 /* Identify the PHY */
242 hw->phy.ops.identify(hw);
243
244 /* Clear the VLAN filter table */
245 hw->mac.ops.clear_vfta(hw);
246
247 /* Clear statistics registers */
248 hw->mac.ops.clear_hw_cntrs(hw);
249
250 /* Set No Snoop Disable */
251 ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
252 ctrl_ext |= IXGBE_CTRL_EXT_NS_DIS;
253 IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
254 IXGBE_WRITE_FLUSH(hw);
255
256 /* Setup flow control */
257 ixgbe_setup_fc(hw);
258
259 /* Clear adapter stopped flag */
260 hw->adapter_stopped = false;
261
262 return 0;
263}
264
265/**
266 * ixgbe_start_hw_gen2 - Init sequence for common device family
267 * @hw: pointer to hw structure
268 *
269 * Performs the init sequence common to the second generation
270 * of 10 GbE devices.
271 * Devices in the second generation:
272 * 82599
273 * X540
274 **/
275s32 ixgbe_start_hw_gen2(struct ixgbe_hw *hw)
276{
277 u32 i;
278 u32 regval;
279
280 /* Clear the rate limiters */
281 for (i = 0; i < hw->mac.max_tx_queues; i++) {
282 IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, i);
283 IXGBE_WRITE_REG(hw, IXGBE_RTTBCNRC, 0);
284 }
285 IXGBE_WRITE_FLUSH(hw);
286
287 /* Disable relaxed ordering */
288 for (i = 0; i < hw->mac.max_tx_queues; i++) {
289 regval = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(i));
290 regval &= ~IXGBE_DCA_TXCTRL_DESC_WRO_EN;
291 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(i), regval);
292 }
293
294 for (i = 0; i < hw->mac.max_rx_queues; i++) {
295 regval = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(i));
296 regval &= ~(IXGBE_DCA_RXCTRL_DATA_WRO_EN |
297 IXGBE_DCA_RXCTRL_HEAD_WRO_EN);
298 IXGBE_WRITE_REG(hw, IXGBE_DCA_RXCTRL(i), regval);
299 }
300
301 return 0;
302}
303
304/**
305 * ixgbe_init_hw_generic - Generic hardware initialization
306 * @hw: pointer to hardware structure
307 *
308 * Initialize the hardware by resetting the hardware, filling the bus info
309 * structure and media type, clears all on chip counters, initializes receive
310 * address registers, multicast table, VLAN filter table, calls routine to set
311 * up link and flow control settings, and leaves transmit and receive units
312 * disabled and uninitialized
313 **/
314s32 ixgbe_init_hw_generic(struct ixgbe_hw *hw)
315{
316 s32 status;
317
318 /* Reset the hardware */
319 status = hw->mac.ops.reset_hw(hw);
320
321 if (status == 0) {
322 /* Start the HW */
323 status = hw->mac.ops.start_hw(hw);
324 }
325
326 return status;
327}
328
329/**
330 * ixgbe_clear_hw_cntrs_generic - Generic clear hardware counters
331 * @hw: pointer to hardware structure
332 *
333 * Clears all hardware statistics counters by reading them from the hardware
334 * Statistics counters are clear on read.
335 **/
336s32 ixgbe_clear_hw_cntrs_generic(struct ixgbe_hw *hw)
337{
338 u16 i = 0;
339
340 IXGBE_READ_REG(hw, IXGBE_CRCERRS);
341 IXGBE_READ_REG(hw, IXGBE_ILLERRC);
342 IXGBE_READ_REG(hw, IXGBE_ERRBC);
343 IXGBE_READ_REG(hw, IXGBE_MSPDC);
344 for (i = 0; i < 8; i++)
345 IXGBE_READ_REG(hw, IXGBE_MPC(i));
346
347 IXGBE_READ_REG(hw, IXGBE_MLFC);
348 IXGBE_READ_REG(hw, IXGBE_MRFC);
349 IXGBE_READ_REG(hw, IXGBE_RLEC);
350 IXGBE_READ_REG(hw, IXGBE_LXONTXC);
351 IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
352 if (hw->mac.type >= ixgbe_mac_82599EB) {
353 IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
354 IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
355 } else {
356 IXGBE_READ_REG(hw, IXGBE_LXONRXC);
357 IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
358 }
359
360 for (i = 0; i < 8; i++) {
361 IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
362 IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
363 if (hw->mac.type >= ixgbe_mac_82599EB) {
364 IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i));
365 IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i));
366 } else {
367 IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
368 IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
369 }
370 }
371 if (hw->mac.type >= ixgbe_mac_82599EB)
372 for (i = 0; i < 8; i++)
373 IXGBE_READ_REG(hw, IXGBE_PXON2OFFCNT(i));
374 IXGBE_READ_REG(hw, IXGBE_PRC64);
375 IXGBE_READ_REG(hw, IXGBE_PRC127);
376 IXGBE_READ_REG(hw, IXGBE_PRC255);
377 IXGBE_READ_REG(hw, IXGBE_PRC511);
378 IXGBE_READ_REG(hw, IXGBE_PRC1023);
379 IXGBE_READ_REG(hw, IXGBE_PRC1522);
380 IXGBE_READ_REG(hw, IXGBE_GPRC);
381 IXGBE_READ_REG(hw, IXGBE_BPRC);
382 IXGBE_READ_REG(hw, IXGBE_MPRC);
383 IXGBE_READ_REG(hw, IXGBE_GPTC);
384 IXGBE_READ_REG(hw, IXGBE_GORCL);
385 IXGBE_READ_REG(hw, IXGBE_GORCH);
386 IXGBE_READ_REG(hw, IXGBE_GOTCL);
387 IXGBE_READ_REG(hw, IXGBE_GOTCH);
388 if (hw->mac.type == ixgbe_mac_82598EB)
389 for (i = 0; i < 8; i++)
390 IXGBE_READ_REG(hw, IXGBE_RNBC(i));
391 IXGBE_READ_REG(hw, IXGBE_RUC);
392 IXGBE_READ_REG(hw, IXGBE_RFC);
393 IXGBE_READ_REG(hw, IXGBE_ROC);
394 IXGBE_READ_REG(hw, IXGBE_RJC);
395 IXGBE_READ_REG(hw, IXGBE_MNGPRC);
396 IXGBE_READ_REG(hw, IXGBE_MNGPDC);
397 IXGBE_READ_REG(hw, IXGBE_MNGPTC);
398 IXGBE_READ_REG(hw, IXGBE_TORL);
399 IXGBE_READ_REG(hw, IXGBE_TORH);
400 IXGBE_READ_REG(hw, IXGBE_TPR);
401 IXGBE_READ_REG(hw, IXGBE_TPT);
402 IXGBE_READ_REG(hw, IXGBE_PTC64);
403 IXGBE_READ_REG(hw, IXGBE_PTC127);
404 IXGBE_READ_REG(hw, IXGBE_PTC255);
405 IXGBE_READ_REG(hw, IXGBE_PTC511);
406 IXGBE_READ_REG(hw, IXGBE_PTC1023);
407 IXGBE_READ_REG(hw, IXGBE_PTC1522);
408 IXGBE_READ_REG(hw, IXGBE_MPTC);
409 IXGBE_READ_REG(hw, IXGBE_BPTC);
410 for (i = 0; i < 16; i++) {
411 IXGBE_READ_REG(hw, IXGBE_QPRC(i));
412 IXGBE_READ_REG(hw, IXGBE_QPTC(i));
413 if (hw->mac.type >= ixgbe_mac_82599EB) {
414 IXGBE_READ_REG(hw, IXGBE_QBRC_L(i));
415 IXGBE_READ_REG(hw, IXGBE_QBRC_H(i));
416 IXGBE_READ_REG(hw, IXGBE_QBTC_L(i));
417 IXGBE_READ_REG(hw, IXGBE_QBTC_H(i));
418 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
419 } else {
420 IXGBE_READ_REG(hw, IXGBE_QBRC(i));
421 IXGBE_READ_REG(hw, IXGBE_QBTC(i));
422 }
423 }
424
425 if (hw->mac.type == ixgbe_mac_X540) {
426 if (hw->phy.id == 0)
427 hw->phy.ops.identify(hw);
428 hw->phy.ops.read_reg(hw, IXGBE_PCRC8ECL, MDIO_MMD_PCS, &i);
429 hw->phy.ops.read_reg(hw, IXGBE_PCRC8ECH, MDIO_MMD_PCS, &i);
430 hw->phy.ops.read_reg(hw, IXGBE_LDPCECL, MDIO_MMD_PCS, &i);
431 hw->phy.ops.read_reg(hw, IXGBE_LDPCECH, MDIO_MMD_PCS, &i);
432 }
433
434 return 0;
435}
436
437/**
438 * ixgbe_read_pba_string_generic - Reads part number string from EEPROM
439 * @hw: pointer to hardware structure
440 * @pba_num: stores the part number string from the EEPROM
441 * @pba_num_size: part number string buffer length
442 *
443 * Reads the part number string from the EEPROM.
444 **/
445s32 ixgbe_read_pba_string_generic(struct ixgbe_hw *hw, u8 *pba_num,
446 u32 pba_num_size)
447{
448 s32 ret_val;
449 u16 data;
450 u16 pba_ptr;
451 u16 offset;
452 u16 length;
453
454 if (pba_num == NULL) {
455 hw_dbg(hw, "PBA string buffer was null\n");
456 return IXGBE_ERR_INVALID_ARGUMENT;
457 }
458
459 ret_val = hw->eeprom.ops.read(hw, IXGBE_PBANUM0_PTR, &data);
460 if (ret_val) {
461 hw_dbg(hw, "NVM Read Error\n");
462 return ret_val;
463 }
464
465 ret_val = hw->eeprom.ops.read(hw, IXGBE_PBANUM1_PTR, &pba_ptr);
466 if (ret_val) {
467 hw_dbg(hw, "NVM Read Error\n");
468 return ret_val;
469 }
470
471 /*
472 * if data is not ptr guard the PBA must be in legacy format which
473 * means pba_ptr is actually our second data word for the PBA number
474 * and we can decode it into an ascii string
475 */
476 if (data != IXGBE_PBANUM_PTR_GUARD) {
477 hw_dbg(hw, "NVM PBA number is not stored as string\n");
478
479 /* we will need 11 characters to store the PBA */
480 if (pba_num_size < 11) {
481 hw_dbg(hw, "PBA string buffer too small\n");
482 return IXGBE_ERR_NO_SPACE;
483 }
484
485 /* extract hex string from data and pba_ptr */
486 pba_num[0] = (data >> 12) & 0xF;
487 pba_num[1] = (data >> 8) & 0xF;
488 pba_num[2] = (data >> 4) & 0xF;
489 pba_num[3] = data & 0xF;
490 pba_num[4] = (pba_ptr >> 12) & 0xF;
491 pba_num[5] = (pba_ptr >> 8) & 0xF;
492 pba_num[6] = '-';
493 pba_num[7] = 0;
494 pba_num[8] = (pba_ptr >> 4) & 0xF;
495 pba_num[9] = pba_ptr & 0xF;
496
497 /* put a null character on the end of our string */
498 pba_num[10] = '\0';
499
500 /* switch all the data but the '-' to hex char */
501 for (offset = 0; offset < 10; offset++) {
502 if (pba_num[offset] < 0xA)
503 pba_num[offset] += '0';
504 else if (pba_num[offset] < 0x10)
505 pba_num[offset] += 'A' - 0xA;
506 }
507
508 return 0;
509 }
510
511 ret_val = hw->eeprom.ops.read(hw, pba_ptr, &length);
512 if (ret_val) {
513 hw_dbg(hw, "NVM Read Error\n");
514 return ret_val;
515 }
516
517 if (length == 0xFFFF || length == 0) {
518 hw_dbg(hw, "NVM PBA number section invalid length\n");
519 return IXGBE_ERR_PBA_SECTION;
520 }
521
522 /* check if pba_num buffer is big enough */
523 if (pba_num_size < (((u32)length * 2) - 1)) {
524 hw_dbg(hw, "PBA string buffer too small\n");
525 return IXGBE_ERR_NO_SPACE;
526 }
527
528 /* trim pba length from start of string */
529 pba_ptr++;
530 length--;
531
532 for (offset = 0; offset < length; offset++) {
533 ret_val = hw->eeprom.ops.read(hw, pba_ptr + offset, &data);
534 if (ret_val) {
535 hw_dbg(hw, "NVM Read Error\n");
536 return ret_val;
537 }
538 pba_num[offset * 2] = (u8)(data >> 8);
539 pba_num[(offset * 2) + 1] = (u8)(data & 0xFF);
540 }
541 pba_num[offset * 2] = '\0';
542
543 return 0;
544}
545
546/**
547 * ixgbe_get_mac_addr_generic - Generic get MAC address
548 * @hw: pointer to hardware structure
549 * @mac_addr: Adapter MAC address
550 *
551 * Reads the adapter's MAC address from first Receive Address Register (RAR0)
552 * A reset of the adapter must be performed prior to calling this function
553 * in order for the MAC address to have been loaded from the EEPROM into RAR0
554 **/
555s32 ixgbe_get_mac_addr_generic(struct ixgbe_hw *hw, u8 *mac_addr)
556{
557 u32 rar_high;
558 u32 rar_low;
559 u16 i;
560
561 rar_high = IXGBE_READ_REG(hw, IXGBE_RAH(0));
562 rar_low = IXGBE_READ_REG(hw, IXGBE_RAL(0));
563
564 for (i = 0; i < 4; i++)
565 mac_addr[i] = (u8)(rar_low >> (i*8));
566
567 for (i = 0; i < 2; i++)
568 mac_addr[i+4] = (u8)(rar_high >> (i*8));
569
570 return 0;
571}
572
573/**
574 * ixgbe_get_bus_info_generic - Generic set PCI bus info
575 * @hw: pointer to hardware structure
576 *
577 * Sets the PCI bus info (speed, width, type) within the ixgbe_hw structure
578 **/
579s32 ixgbe_get_bus_info_generic(struct ixgbe_hw *hw)
580{
581 struct ixgbe_adapter *adapter = hw->back;
582 struct ixgbe_mac_info *mac = &hw->mac;
583 u16 link_status;
584
585 hw->bus.type = ixgbe_bus_type_pci_express;
586
587 /* Get the negotiated link width and speed from PCI config space */
588 pci_read_config_word(adapter->pdev, IXGBE_PCI_LINK_STATUS,
589 &link_status);
590
591 switch (link_status & IXGBE_PCI_LINK_WIDTH) {
592 case IXGBE_PCI_LINK_WIDTH_1:
593 hw->bus.width = ixgbe_bus_width_pcie_x1;
594 break;
595 case IXGBE_PCI_LINK_WIDTH_2:
596 hw->bus.width = ixgbe_bus_width_pcie_x2;
597 break;
598 case IXGBE_PCI_LINK_WIDTH_4:
599 hw->bus.width = ixgbe_bus_width_pcie_x4;
600 break;
601 case IXGBE_PCI_LINK_WIDTH_8:
602 hw->bus.width = ixgbe_bus_width_pcie_x8;
603 break;
604 default:
605 hw->bus.width = ixgbe_bus_width_unknown;
606 break;
607 }
608
609 switch (link_status & IXGBE_PCI_LINK_SPEED) {
610 case IXGBE_PCI_LINK_SPEED_2500:
611 hw->bus.speed = ixgbe_bus_speed_2500;
612 break;
613 case IXGBE_PCI_LINK_SPEED_5000:
614 hw->bus.speed = ixgbe_bus_speed_5000;
615 break;
616 default:
617 hw->bus.speed = ixgbe_bus_speed_unknown;
618 break;
619 }
620
621 mac->ops.set_lan_id(hw);
622
623 return 0;
624}
625
626/**
627 * ixgbe_set_lan_id_multi_port_pcie - Set LAN id for PCIe multiple port devices
628 * @hw: pointer to the HW structure
629 *
630 * Determines the LAN function id by reading memory-mapped registers
631 * and swaps the port value if requested.
632 **/
633void ixgbe_set_lan_id_multi_port_pcie(struct ixgbe_hw *hw)
634{
635 struct ixgbe_bus_info *bus = &hw->bus;
636 u32 reg;
637
638 reg = IXGBE_READ_REG(hw, IXGBE_STATUS);
639 bus->func = (reg & IXGBE_STATUS_LAN_ID) >> IXGBE_STATUS_LAN_ID_SHIFT;
640 bus->lan_id = bus->func;
641
642 /* check for a port swap */
643 reg = IXGBE_READ_REG(hw, IXGBE_FACTPS);
644 if (reg & IXGBE_FACTPS_LFS)
645 bus->func ^= 0x1;
646}
647
648/**
649 * ixgbe_stop_adapter_generic - Generic stop Tx/Rx units
650 * @hw: pointer to hardware structure
651 *
652 * Sets the adapter_stopped flag within ixgbe_hw struct. Clears interrupts,
653 * disables transmit and receive units. The adapter_stopped flag is used by
654 * the shared code and drivers to determine if the adapter is in a stopped
655 * state and should not touch the hardware.
656 **/
657s32 ixgbe_stop_adapter_generic(struct ixgbe_hw *hw)
658{
659 u32 reg_val;
660 u16 i;
661
662 /*
663 * Set the adapter_stopped flag so other driver functions stop touching
664 * the hardware
665 */
666 hw->adapter_stopped = true;
667
668 /* Disable the receive unit */
669 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, 0);
670
671 /* Clear interrupt mask to stop interrupts from being generated */
672 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
673
674 /* Clear any pending interrupts, flush previous writes */
675 IXGBE_READ_REG(hw, IXGBE_EICR);
676
677 /* Disable the transmit unit. Each queue must be disabled. */
678 for (i = 0; i < hw->mac.max_tx_queues; i++)
679 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(i), IXGBE_TXDCTL_SWFLSH);
680
681 /* Disable the receive unit by stopping each queue */
682 for (i = 0; i < hw->mac.max_rx_queues; i++) {
683 reg_val = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
684 reg_val &= ~IXGBE_RXDCTL_ENABLE;
685 reg_val |= IXGBE_RXDCTL_SWFLSH;
686 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(i), reg_val);
687 }
688
689 /* flush all queues disables */
690 IXGBE_WRITE_FLUSH(hw);
691 usleep_range(1000, 2000);
692
693 /*
694 * Prevent the PCI-E bus from from hanging by disabling PCI-E master
695 * access and verify no pending requests
696 */
697 return ixgbe_disable_pcie_master(hw);
698}
699
700/**
701 * ixgbe_led_on_generic - Turns on the software controllable LEDs.
702 * @hw: pointer to hardware structure
703 * @index: led number to turn on
704 **/
705s32 ixgbe_led_on_generic(struct ixgbe_hw *hw, u32 index)
706{
707 u32 led_reg = IXGBE_READ_REG(hw, IXGBE_LEDCTL);
708
709 /* To turn on the LED, set mode to ON. */
710 led_reg &= ~IXGBE_LED_MODE_MASK(index);
711 led_reg |= IXGBE_LED_ON << IXGBE_LED_MODE_SHIFT(index);
712 IXGBE_WRITE_REG(hw, IXGBE_LEDCTL, led_reg);
713 IXGBE_WRITE_FLUSH(hw);
714
715 return 0;
716}
717
718/**
719 * ixgbe_led_off_generic - Turns off the software controllable LEDs.
720 * @hw: pointer to hardware structure
721 * @index: led number to turn off
722 **/
723s32 ixgbe_led_off_generic(struct ixgbe_hw *hw, u32 index)
724{
725 u32 led_reg = IXGBE_READ_REG(hw, IXGBE_LEDCTL);
726
727 /* To turn off the LED, set mode to OFF. */
728 led_reg &= ~IXGBE_LED_MODE_MASK(index);
729 led_reg |= IXGBE_LED_OFF << IXGBE_LED_MODE_SHIFT(index);
730 IXGBE_WRITE_REG(hw, IXGBE_LEDCTL, led_reg);
731 IXGBE_WRITE_FLUSH(hw);
732
733 return 0;
734}
735
736/**
737 * ixgbe_init_eeprom_params_generic - Initialize EEPROM params
738 * @hw: pointer to hardware structure
739 *
740 * Initializes the EEPROM parameters ixgbe_eeprom_info within the
741 * ixgbe_hw struct in order to set up EEPROM access.
742 **/
743s32 ixgbe_init_eeprom_params_generic(struct ixgbe_hw *hw)
744{
745 struct ixgbe_eeprom_info *eeprom = &hw->eeprom;
746 u32 eec;
747 u16 eeprom_size;
748
749 if (eeprom->type == ixgbe_eeprom_uninitialized) {
750 eeprom->type = ixgbe_eeprom_none;
751 /* Set default semaphore delay to 10ms which is a well
752 * tested value */
753 eeprom->semaphore_delay = 10;
754 /* Clear EEPROM page size, it will be initialized as needed */
755 eeprom->word_page_size = 0;
756
757 /*
758 * Check for EEPROM present first.
759 * If not present leave as none
760 */
761 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
762 if (eec & IXGBE_EEC_PRES) {
763 eeprom->type = ixgbe_eeprom_spi;
764
765 /*
766 * SPI EEPROM is assumed here. This code would need to
767 * change if a future EEPROM is not SPI.
768 */
769 eeprom_size = (u16)((eec & IXGBE_EEC_SIZE) >>
770 IXGBE_EEC_SIZE_SHIFT);
771 eeprom->word_size = 1 << (eeprom_size +
772 IXGBE_EEPROM_WORD_SIZE_SHIFT);
773 }
774
775 if (eec & IXGBE_EEC_ADDR_SIZE)
776 eeprom->address_bits = 16;
777 else
778 eeprom->address_bits = 8;
779 hw_dbg(hw, "Eeprom params: type = %d, size = %d, address bits: "
780 "%d\n", eeprom->type, eeprom->word_size,
781 eeprom->address_bits);
782 }
783
784 return 0;
785}
786
787/**
788 * ixgbe_write_eeprom_buffer_bit_bang_generic - Write EEPROM using bit-bang
789 * @hw: pointer to hardware structure
790 * @offset: offset within the EEPROM to write
791 * @words: number of words
792 * @data: 16 bit word(s) to write to EEPROM
793 *
794 * Reads 16 bit word(s) from EEPROM through bit-bang method
795 **/
796s32 ixgbe_write_eeprom_buffer_bit_bang_generic(struct ixgbe_hw *hw, u16 offset,
797 u16 words, u16 *data)
798{
799 s32 status = 0;
800 u16 i, count;
801
802 hw->eeprom.ops.init_params(hw);
803
804 if (words == 0) {
805 status = IXGBE_ERR_INVALID_ARGUMENT;
806 goto out;
807 }
808
809 if (offset + words > hw->eeprom.word_size) {
810 status = IXGBE_ERR_EEPROM;
811 goto out;
812 }
813
814 /*
815 * The EEPROM page size cannot be queried from the chip. We do lazy
816 * initialization. It is worth to do that when we write large buffer.
817 */
818 if ((hw->eeprom.word_page_size == 0) &&
819 (words > IXGBE_EEPROM_PAGE_SIZE_MAX))
820 ixgbe_detect_eeprom_page_size_generic(hw, offset);
821
822 /*
823 * We cannot hold synchronization semaphores for too long
824 * to avoid other entity starvation. However it is more efficient
825 * to read in bursts than synchronizing access for each word.
826 */
827 for (i = 0; i < words; i += IXGBE_EEPROM_RD_BUFFER_MAX_COUNT) {
828 count = (words - i) / IXGBE_EEPROM_RD_BUFFER_MAX_COUNT > 0 ?
829 IXGBE_EEPROM_RD_BUFFER_MAX_COUNT : (words - i);
830 status = ixgbe_write_eeprom_buffer_bit_bang(hw, offset + i,
831 count, &data[i]);
832
833 if (status != 0)
834 break;
835 }
836
837out:
838 return status;
839}
840
841/**
842 * ixgbe_write_eeprom_buffer_bit_bang - Writes 16 bit word(s) to EEPROM
843 * @hw: pointer to hardware structure
844 * @offset: offset within the EEPROM to be written to
845 * @words: number of word(s)
846 * @data: 16 bit word(s) to be written to the EEPROM
847 *
848 * If ixgbe_eeprom_update_checksum is not called after this function, the
849 * EEPROM will most likely contain an invalid checksum.
850 **/
851static s32 ixgbe_write_eeprom_buffer_bit_bang(struct ixgbe_hw *hw, u16 offset,
852 u16 words, u16 *data)
853{
854 s32 status;
855 u16 word;
856 u16 page_size;
857 u16 i;
858 u8 write_opcode = IXGBE_EEPROM_WRITE_OPCODE_SPI;
859
860 /* Prepare the EEPROM for writing */
861 status = ixgbe_acquire_eeprom(hw);
862
863 if (status == 0) {
864 if (ixgbe_ready_eeprom(hw) != 0) {
865 ixgbe_release_eeprom(hw);
866 status = IXGBE_ERR_EEPROM;
867 }
868 }
869
870 if (status == 0) {
871 for (i = 0; i < words; i++) {
872 ixgbe_standby_eeprom(hw);
873
874 /* Send the WRITE ENABLE command (8 bit opcode ) */
875 ixgbe_shift_out_eeprom_bits(hw,
876 IXGBE_EEPROM_WREN_OPCODE_SPI,
877 IXGBE_EEPROM_OPCODE_BITS);
878
879 ixgbe_standby_eeprom(hw);
880
881 /*
882 * Some SPI eeproms use the 8th address bit embedded
883 * in the opcode
884 */
885 if ((hw->eeprom.address_bits == 8) &&
886 ((offset + i) >= 128))
887 write_opcode |= IXGBE_EEPROM_A8_OPCODE_SPI;
888
889 /* Send the Write command (8-bit opcode + addr) */
890 ixgbe_shift_out_eeprom_bits(hw, write_opcode,
891 IXGBE_EEPROM_OPCODE_BITS);
892 ixgbe_shift_out_eeprom_bits(hw, (u16)((offset + i) * 2),
893 hw->eeprom.address_bits);
894
895 page_size = hw->eeprom.word_page_size;
896
897 /* Send the data in burst via SPI*/
898 do {
899 word = data[i];
900 word = (word >> 8) | (word << 8);
901 ixgbe_shift_out_eeprom_bits(hw, word, 16);
902
903 if (page_size == 0)
904 break;
905
906 /* do not wrap around page */
907 if (((offset + i) & (page_size - 1)) ==
908 (page_size - 1))
909 break;
910 } while (++i < words);
911
912 ixgbe_standby_eeprom(hw);
913 usleep_range(10000, 20000);
914 }
915 /* Done with writing - release the EEPROM */
916 ixgbe_release_eeprom(hw);
917 }
918
919 return status;
920}
921
922/**
923 * ixgbe_write_eeprom_generic - Writes 16 bit value to EEPROM
924 * @hw: pointer to hardware structure
925 * @offset: offset within the EEPROM to be written to
926 * @data: 16 bit word to be written to the EEPROM
927 *
928 * If ixgbe_eeprom_update_checksum is not called after this function, the
929 * EEPROM will most likely contain an invalid checksum.
930 **/
931s32 ixgbe_write_eeprom_generic(struct ixgbe_hw *hw, u16 offset, u16 data)
932{
933 s32 status;
934
935 hw->eeprom.ops.init_params(hw);
936
937 if (offset >= hw->eeprom.word_size) {
938 status = IXGBE_ERR_EEPROM;
939 goto out;
940 }
941
942 status = ixgbe_write_eeprom_buffer_bit_bang(hw, offset, 1, &data);
943
944out:
945 return status;
946}
947
948/**
949 * ixgbe_read_eeprom_buffer_bit_bang_generic - Read EEPROM using bit-bang
950 * @hw: pointer to hardware structure
951 * @offset: offset within the EEPROM to be read
952 * @words: number of word(s)
953 * @data: read 16 bit words(s) from EEPROM
954 *
955 * Reads 16 bit word(s) from EEPROM through bit-bang method
956 **/
957s32 ixgbe_read_eeprom_buffer_bit_bang_generic(struct ixgbe_hw *hw, u16 offset,
958 u16 words, u16 *data)
959{
960 s32 status = 0;
961 u16 i, count;
962
963 hw->eeprom.ops.init_params(hw);
964
965 if (words == 0) {
966 status = IXGBE_ERR_INVALID_ARGUMENT;
967 goto out;
968 }
969
970 if (offset + words > hw->eeprom.word_size) {
971 status = IXGBE_ERR_EEPROM;
972 goto out;
973 }
974
975 /*
976 * We cannot hold synchronization semaphores for too long
977 * to avoid other entity starvation. However it is more efficient
978 * to read in bursts than synchronizing access for each word.
979 */
980 for (i = 0; i < words; i += IXGBE_EEPROM_RD_BUFFER_MAX_COUNT) {
981 count = (words - i) / IXGBE_EEPROM_RD_BUFFER_MAX_COUNT > 0 ?
982 IXGBE_EEPROM_RD_BUFFER_MAX_COUNT : (words - i);
983
984 status = ixgbe_read_eeprom_buffer_bit_bang(hw, offset + i,
985 count, &data[i]);
986
987 if (status != 0)
988 break;
989 }
990
991out:
992 return status;
993}
994
995/**
996 * ixgbe_read_eeprom_buffer_bit_bang - Read EEPROM using bit-bang
997 * @hw: pointer to hardware structure
998 * @offset: offset within the EEPROM to be read
999 * @words: number of word(s)
1000 * @data: read 16 bit word(s) from EEPROM
1001 *
1002 * Reads 16 bit word(s) from EEPROM through bit-bang method
1003 **/
1004static s32 ixgbe_read_eeprom_buffer_bit_bang(struct ixgbe_hw *hw, u16 offset,
1005 u16 words, u16 *data)
1006{
1007 s32 status;
1008 u16 word_in;
1009 u8 read_opcode = IXGBE_EEPROM_READ_OPCODE_SPI;
1010 u16 i;
1011
1012 /* Prepare the EEPROM for reading */
1013 status = ixgbe_acquire_eeprom(hw);
1014
1015 if (status == 0) {
1016 if (ixgbe_ready_eeprom(hw) != 0) {
1017 ixgbe_release_eeprom(hw);
1018 status = IXGBE_ERR_EEPROM;
1019 }
1020 }
1021
1022 if (status == 0) {
1023 for (i = 0; i < words; i++) {
1024 ixgbe_standby_eeprom(hw);
1025 /*
1026 * Some SPI eeproms use the 8th address bit embedded
1027 * in the opcode
1028 */
1029 if ((hw->eeprom.address_bits == 8) &&
1030 ((offset + i) >= 128))
1031 read_opcode |= IXGBE_EEPROM_A8_OPCODE_SPI;
1032
1033 /* Send the READ command (opcode + addr) */
1034 ixgbe_shift_out_eeprom_bits(hw, read_opcode,
1035 IXGBE_EEPROM_OPCODE_BITS);
1036 ixgbe_shift_out_eeprom_bits(hw, (u16)((offset + i) * 2),
1037 hw->eeprom.address_bits);
1038
1039 /* Read the data. */
1040 word_in = ixgbe_shift_in_eeprom_bits(hw, 16);
1041 data[i] = (word_in >> 8) | (word_in << 8);
1042 }
1043
1044 /* End this read operation */
1045 ixgbe_release_eeprom(hw);
1046 }
1047
1048 return status;
1049}
1050
1051/**
1052 * ixgbe_read_eeprom_bit_bang_generic - Read EEPROM word using bit-bang
1053 * @hw: pointer to hardware structure
1054 * @offset: offset within the EEPROM to be read
1055 * @data: read 16 bit value from EEPROM
1056 *
1057 * Reads 16 bit value from EEPROM through bit-bang method
1058 **/
1059s32 ixgbe_read_eeprom_bit_bang_generic(struct ixgbe_hw *hw, u16 offset,
1060 u16 *data)
1061{
1062 s32 status;
1063
1064 hw->eeprom.ops.init_params(hw);
1065
1066 if (offset >= hw->eeprom.word_size) {
1067 status = IXGBE_ERR_EEPROM;
1068 goto out;
1069 }
1070
1071 status = ixgbe_read_eeprom_buffer_bit_bang(hw, offset, 1, data);
1072
1073out:
1074 return status;
1075}
1076
1077/**
1078 * ixgbe_read_eerd_buffer_generic - Read EEPROM word(s) using EERD
1079 * @hw: pointer to hardware structure
1080 * @offset: offset of word in the EEPROM to read
1081 * @words: number of word(s)
1082 * @data: 16 bit word(s) from the EEPROM
1083 *
1084 * Reads a 16 bit word(s) from the EEPROM using the EERD register.
1085 **/
1086s32 ixgbe_read_eerd_buffer_generic(struct ixgbe_hw *hw, u16 offset,
1087 u16 words, u16 *data)
1088{
1089 u32 eerd;
1090 s32 status = 0;
1091 u32 i;
1092
1093 hw->eeprom.ops.init_params(hw);
1094
1095 if (words == 0) {
1096 status = IXGBE_ERR_INVALID_ARGUMENT;
1097 goto out;
1098 }
1099
1100 if (offset >= hw->eeprom.word_size) {
1101 status = IXGBE_ERR_EEPROM;
1102 goto out;
1103 }
1104
1105 for (i = 0; i < words; i++) {
1106 eerd = ((offset + i) << IXGBE_EEPROM_RW_ADDR_SHIFT) +
1107 IXGBE_EEPROM_RW_REG_START;
1108
1109 IXGBE_WRITE_REG(hw, IXGBE_EERD, eerd);
1110 status = ixgbe_poll_eerd_eewr_done(hw, IXGBE_NVM_POLL_READ);
1111
1112 if (status == 0) {
1113 data[i] = (IXGBE_READ_REG(hw, IXGBE_EERD) >>
1114 IXGBE_EEPROM_RW_REG_DATA);
1115 } else {
1116 hw_dbg(hw, "Eeprom read timed out\n");
1117 goto out;
1118 }
1119 }
1120out:
1121 return status;
1122}
1123
1124/**
1125 * ixgbe_detect_eeprom_page_size_generic - Detect EEPROM page size
1126 * @hw: pointer to hardware structure
1127 * @offset: offset within the EEPROM to be used as a scratch pad
1128 *
1129 * Discover EEPROM page size by writing marching data at given offset.
1130 * This function is called only when we are writing a new large buffer
1131 * at given offset so the data would be overwritten anyway.
1132 **/
1133static s32 ixgbe_detect_eeprom_page_size_generic(struct ixgbe_hw *hw,
1134 u16 offset)
1135{
1136 u16 data[IXGBE_EEPROM_PAGE_SIZE_MAX];
1137 s32 status = 0;
1138 u16 i;
1139
1140 for (i = 0; i < IXGBE_EEPROM_PAGE_SIZE_MAX; i++)
1141 data[i] = i;
1142
1143 hw->eeprom.word_page_size = IXGBE_EEPROM_PAGE_SIZE_MAX;
1144 status = ixgbe_write_eeprom_buffer_bit_bang(hw, offset,
1145 IXGBE_EEPROM_PAGE_SIZE_MAX, data);
1146 hw->eeprom.word_page_size = 0;
1147 if (status != 0)
1148 goto out;
1149
1150 status = ixgbe_read_eeprom_buffer_bit_bang(hw, offset, 1, data);
1151 if (status != 0)
1152 goto out;
1153
1154 /*
1155 * When writing in burst more than the actual page size
1156 * EEPROM address wraps around current page.
1157 */
1158 hw->eeprom.word_page_size = IXGBE_EEPROM_PAGE_SIZE_MAX - data[0];
1159
1160 hw_dbg(hw, "Detected EEPROM page size = %d words.",
1161 hw->eeprom.word_page_size);
1162out:
1163 return status;
1164}
1165
1166/**
1167 * ixgbe_read_eerd_generic - Read EEPROM word using EERD
1168 * @hw: pointer to hardware structure
1169 * @offset: offset of word in the EEPROM to read
1170 * @data: word read from the EEPROM
1171 *
1172 * Reads a 16 bit word from the EEPROM using the EERD register.
1173 **/
1174s32 ixgbe_read_eerd_generic(struct ixgbe_hw *hw, u16 offset, u16 *data)
1175{
1176 return ixgbe_read_eerd_buffer_generic(hw, offset, 1, data);
1177}
1178
1179/**
1180 * ixgbe_write_eewr_buffer_generic - Write EEPROM word(s) using EEWR
1181 * @hw: pointer to hardware structure
1182 * @offset: offset of word in the EEPROM to write
1183 * @words: number of words
1184 * @data: word(s) write to the EEPROM
1185 *
1186 * Write a 16 bit word(s) to the EEPROM using the EEWR register.
1187 **/
1188s32 ixgbe_write_eewr_buffer_generic(struct ixgbe_hw *hw, u16 offset,
1189 u16 words, u16 *data)
1190{
1191 u32 eewr;
1192 s32 status = 0;
1193 u16 i;
1194
1195 hw->eeprom.ops.init_params(hw);
1196
1197 if (words == 0) {
1198 status = IXGBE_ERR_INVALID_ARGUMENT;
1199 goto out;
1200 }
1201
1202 if (offset >= hw->eeprom.word_size) {
1203 status = IXGBE_ERR_EEPROM;
1204 goto out;
1205 }
1206
1207 for (i = 0; i < words; i++) {
1208 eewr = ((offset + i) << IXGBE_EEPROM_RW_ADDR_SHIFT) |
1209 (data[i] << IXGBE_EEPROM_RW_REG_DATA) |
1210 IXGBE_EEPROM_RW_REG_START;
1211
1212 status = ixgbe_poll_eerd_eewr_done(hw, IXGBE_NVM_POLL_WRITE);
1213 if (status != 0) {
1214 hw_dbg(hw, "Eeprom write EEWR timed out\n");
1215 goto out;
1216 }
1217
1218 IXGBE_WRITE_REG(hw, IXGBE_EEWR, eewr);
1219
1220 status = ixgbe_poll_eerd_eewr_done(hw, IXGBE_NVM_POLL_WRITE);
1221 if (status != 0) {
1222 hw_dbg(hw, "Eeprom write EEWR timed out\n");
1223 goto out;
1224 }
1225 }
1226
1227out:
1228 return status;
1229}
1230
1231/**
1232 * ixgbe_write_eewr_generic - Write EEPROM word using EEWR
1233 * @hw: pointer to hardware structure
1234 * @offset: offset of word in the EEPROM to write
1235 * @data: word write to the EEPROM
1236 *
1237 * Write a 16 bit word to the EEPROM using the EEWR register.
1238 **/
1239s32 ixgbe_write_eewr_generic(struct ixgbe_hw *hw, u16 offset, u16 data)
1240{
1241 return ixgbe_write_eewr_buffer_generic(hw, offset, 1, &data);
1242}
1243
1244/**
1245 * ixgbe_poll_eerd_eewr_done - Poll EERD read or EEWR write status
1246 * @hw: pointer to hardware structure
1247 * @ee_reg: EEPROM flag for polling
1248 *
1249 * Polls the status bit (bit 1) of the EERD or EEWR to determine when the
1250 * read or write is done respectively.
1251 **/
1252static s32 ixgbe_poll_eerd_eewr_done(struct ixgbe_hw *hw, u32 ee_reg)
1253{
1254 u32 i;
1255 u32 reg;
1256 s32 status = IXGBE_ERR_EEPROM;
1257
1258 for (i = 0; i < IXGBE_EERD_EEWR_ATTEMPTS; i++) {
1259 if (ee_reg == IXGBE_NVM_POLL_READ)
1260 reg = IXGBE_READ_REG(hw, IXGBE_EERD);
1261 else
1262 reg = IXGBE_READ_REG(hw, IXGBE_EEWR);
1263
1264 if (reg & IXGBE_EEPROM_RW_REG_DONE) {
1265 status = 0;
1266 break;
1267 }
1268 udelay(5);
1269 }
1270 return status;
1271}
1272
1273/**
1274 * ixgbe_acquire_eeprom - Acquire EEPROM using bit-bang
1275 * @hw: pointer to hardware structure
1276 *
1277 * Prepares EEPROM for access using bit-bang method. This function should
1278 * be called before issuing a command to the EEPROM.
1279 **/
1280static s32 ixgbe_acquire_eeprom(struct ixgbe_hw *hw)
1281{
1282 s32 status = 0;
1283 u32 eec;
1284 u32 i;
1285
1286 if (hw->mac.ops.acquire_swfw_sync(hw, IXGBE_GSSR_EEP_SM) != 0)
1287 status = IXGBE_ERR_SWFW_SYNC;
1288
1289 if (status == 0) {
1290 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
1291
1292 /* Request EEPROM Access */
1293 eec |= IXGBE_EEC_REQ;
1294 IXGBE_WRITE_REG(hw, IXGBE_EEC, eec);
1295
1296 for (i = 0; i < IXGBE_EEPROM_GRANT_ATTEMPTS; i++) {
1297 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
1298 if (eec & IXGBE_EEC_GNT)
1299 break;
1300 udelay(5);
1301 }
1302
1303 /* Release if grant not acquired */
1304 if (!(eec & IXGBE_EEC_GNT)) {
1305 eec &= ~IXGBE_EEC_REQ;
1306 IXGBE_WRITE_REG(hw, IXGBE_EEC, eec);
1307 hw_dbg(hw, "Could not acquire EEPROM grant\n");
1308
1309 hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_EEP_SM);
1310 status = IXGBE_ERR_EEPROM;
1311 }
1312
1313 /* Setup EEPROM for Read/Write */
1314 if (status == 0) {
1315 /* Clear CS and SK */
1316 eec &= ~(IXGBE_EEC_CS | IXGBE_EEC_SK);
1317 IXGBE_WRITE_REG(hw, IXGBE_EEC, eec);
1318 IXGBE_WRITE_FLUSH(hw);
1319 udelay(1);
1320 }
1321 }
1322 return status;
1323}
1324
1325/**
1326 * ixgbe_get_eeprom_semaphore - Get hardware semaphore
1327 * @hw: pointer to hardware structure
1328 *
1329 * Sets the hardware semaphores so EEPROM access can occur for bit-bang method
1330 **/
1331static s32 ixgbe_get_eeprom_semaphore(struct ixgbe_hw *hw)
1332{
1333 s32 status = IXGBE_ERR_EEPROM;
1334 u32 timeout = 2000;
1335 u32 i;
1336 u32 swsm;
1337
1338 /* Get SMBI software semaphore between device drivers first */
1339 for (i = 0; i < timeout; i++) {
1340 /*
1341 * If the SMBI bit is 0 when we read it, then the bit will be
1342 * set and we have the semaphore
1343 */
1344 swsm = IXGBE_READ_REG(hw, IXGBE_SWSM);
1345 if (!(swsm & IXGBE_SWSM_SMBI)) {
1346 status = 0;
1347 break;
1348 }
1349 udelay(50);
1350 }
1351
1352 if (i == timeout) {
1353 hw_dbg(hw, "Driver can't access the Eeprom - SMBI Semaphore "
1354 "not granted.\n");
1355 /*
1356 * this release is particularly important because our attempts
1357 * above to get the semaphore may have succeeded, and if there
1358 * was a timeout, we should unconditionally clear the semaphore
1359 * bits to free the driver to make progress
1360 */
1361 ixgbe_release_eeprom_semaphore(hw);
1362
1363 udelay(50);
1364 /*
1365 * one last try
1366 * If the SMBI bit is 0 when we read it, then the bit will be
1367 * set and we have the semaphore
1368 */
1369 swsm = IXGBE_READ_REG(hw, IXGBE_SWSM);
1370 if (!(swsm & IXGBE_SWSM_SMBI))
1371 status = 0;
1372 }
1373
1374 /* Now get the semaphore between SW/FW through the SWESMBI bit */
1375 if (status == 0) {
1376 for (i = 0; i < timeout; i++) {
1377 swsm = IXGBE_READ_REG(hw, IXGBE_SWSM);
1378
1379 /* Set the SW EEPROM semaphore bit to request access */
1380 swsm |= IXGBE_SWSM_SWESMBI;
1381 IXGBE_WRITE_REG(hw, IXGBE_SWSM, swsm);
1382
1383 /*
1384 * If we set the bit successfully then we got the
1385 * semaphore.
1386 */
1387 swsm = IXGBE_READ_REG(hw, IXGBE_SWSM);
1388 if (swsm & IXGBE_SWSM_SWESMBI)
1389 break;
1390
1391 udelay(50);
1392 }
1393
1394 /*
1395 * Release semaphores and return error if SW EEPROM semaphore
1396 * was not granted because we don't have access to the EEPROM
1397 */
1398 if (i >= timeout) {
1399 hw_dbg(hw, "SWESMBI Software EEPROM semaphore "
1400 "not granted.\n");
1401 ixgbe_release_eeprom_semaphore(hw);
1402 status = IXGBE_ERR_EEPROM;
1403 }
1404 } else {
1405 hw_dbg(hw, "Software semaphore SMBI between device drivers "
1406 "not granted.\n");
1407 }
1408
1409 return status;
1410}
1411
1412/**
1413 * ixgbe_release_eeprom_semaphore - Release hardware semaphore
1414 * @hw: pointer to hardware structure
1415 *
1416 * This function clears hardware semaphore bits.
1417 **/
1418static void ixgbe_release_eeprom_semaphore(struct ixgbe_hw *hw)
1419{
1420 u32 swsm;
1421
1422 swsm = IXGBE_READ_REG(hw, IXGBE_SWSM);
1423
1424 /* Release both semaphores by writing 0 to the bits SWESMBI and SMBI */
1425 swsm &= ~(IXGBE_SWSM_SWESMBI | IXGBE_SWSM_SMBI);
1426 IXGBE_WRITE_REG(hw, IXGBE_SWSM, swsm);
1427 IXGBE_WRITE_FLUSH(hw);
1428}
1429
1430/**
1431 * ixgbe_ready_eeprom - Polls for EEPROM ready
1432 * @hw: pointer to hardware structure
1433 **/
1434static s32 ixgbe_ready_eeprom(struct ixgbe_hw *hw)
1435{
1436 s32 status = 0;
1437 u16 i;
1438 u8 spi_stat_reg;
1439
1440 /*
1441 * Read "Status Register" repeatedly until the LSB is cleared. The
1442 * EEPROM will signal that the command has been completed by clearing
1443 * bit 0 of the internal status register. If it's not cleared within
1444 * 5 milliseconds, then error out.
1445 */
1446 for (i = 0; i < IXGBE_EEPROM_MAX_RETRY_SPI; i += 5) {
1447 ixgbe_shift_out_eeprom_bits(hw, IXGBE_EEPROM_RDSR_OPCODE_SPI,
1448 IXGBE_EEPROM_OPCODE_BITS);
1449 spi_stat_reg = (u8)ixgbe_shift_in_eeprom_bits(hw, 8);
1450 if (!(spi_stat_reg & IXGBE_EEPROM_STATUS_RDY_SPI))
1451 break;
1452
1453 udelay(5);
1454 ixgbe_standby_eeprom(hw);
1455 }
1456
1457 /*
1458 * On some parts, SPI write time could vary from 0-20mSec on 3.3V
1459 * devices (and only 0-5mSec on 5V devices)
1460 */
1461 if (i >= IXGBE_EEPROM_MAX_RETRY_SPI) {
1462 hw_dbg(hw, "SPI EEPROM Status error\n");
1463 status = IXGBE_ERR_EEPROM;
1464 }
1465
1466 return status;
1467}
1468
1469/**
1470 * ixgbe_standby_eeprom - Returns EEPROM to a "standby" state
1471 * @hw: pointer to hardware structure
1472 **/
1473static void ixgbe_standby_eeprom(struct ixgbe_hw *hw)
1474{
1475 u32 eec;
1476
1477 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
1478
1479 /* Toggle CS to flush commands */
1480 eec |= IXGBE_EEC_CS;
1481 IXGBE_WRITE_REG(hw, IXGBE_EEC, eec);
1482 IXGBE_WRITE_FLUSH(hw);
1483 udelay(1);
1484 eec &= ~IXGBE_EEC_CS;
1485 IXGBE_WRITE_REG(hw, IXGBE_EEC, eec);
1486 IXGBE_WRITE_FLUSH(hw);
1487 udelay(1);
1488}
1489
1490/**
1491 * ixgbe_shift_out_eeprom_bits - Shift data bits out to the EEPROM.
1492 * @hw: pointer to hardware structure
1493 * @data: data to send to the EEPROM
1494 * @count: number of bits to shift out
1495 **/
1496static void ixgbe_shift_out_eeprom_bits(struct ixgbe_hw *hw, u16 data,
1497 u16 count)
1498{
1499 u32 eec;
1500 u32 mask;
1501 u32 i;
1502
1503 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
1504
1505 /*
1506 * Mask is used to shift "count" bits of "data" out to the EEPROM
1507 * one bit at a time. Determine the starting bit based on count
1508 */
1509 mask = 0x01 << (count - 1);
1510
1511 for (i = 0; i < count; i++) {
1512 /*
1513 * A "1" is shifted out to the EEPROM by setting bit "DI" to a
1514 * "1", and then raising and then lowering the clock (the SK
1515 * bit controls the clock input to the EEPROM). A "0" is
1516 * shifted out to the EEPROM by setting "DI" to "0" and then
1517 * raising and then lowering the clock.
1518 */
1519 if (data & mask)
1520 eec |= IXGBE_EEC_DI;
1521 else
1522 eec &= ~IXGBE_EEC_DI;
1523
1524 IXGBE_WRITE_REG(hw, IXGBE_EEC, eec);
1525 IXGBE_WRITE_FLUSH(hw);
1526
1527 udelay(1);
1528
1529 ixgbe_raise_eeprom_clk(hw, &eec);
1530 ixgbe_lower_eeprom_clk(hw, &eec);
1531
1532 /*
1533 * Shift mask to signify next bit of data to shift in to the
1534 * EEPROM
1535 */
1536 mask = mask >> 1;
1537 }
1538
1539 /* We leave the "DI" bit set to "0" when we leave this routine. */
1540 eec &= ~IXGBE_EEC_DI;
1541 IXGBE_WRITE_REG(hw, IXGBE_EEC, eec);
1542 IXGBE_WRITE_FLUSH(hw);
1543}
1544
1545/**
1546 * ixgbe_shift_in_eeprom_bits - Shift data bits in from the EEPROM
1547 * @hw: pointer to hardware structure
1548 **/
1549static u16 ixgbe_shift_in_eeprom_bits(struct ixgbe_hw *hw, u16 count)
1550{
1551 u32 eec;
1552 u32 i;
1553 u16 data = 0;
1554
1555 /*
1556 * In order to read a register from the EEPROM, we need to shift
1557 * 'count' bits in from the EEPROM. Bits are "shifted in" by raising
1558 * the clock input to the EEPROM (setting the SK bit), and then reading
1559 * the value of the "DO" bit. During this "shifting in" process the
1560 * "DI" bit should always be clear.
1561 */
1562 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
1563
1564 eec &= ~(IXGBE_EEC_DO | IXGBE_EEC_DI);
1565
1566 for (i = 0; i < count; i++) {
1567 data = data << 1;
1568 ixgbe_raise_eeprom_clk(hw, &eec);
1569
1570 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
1571
1572 eec &= ~(IXGBE_EEC_DI);
1573 if (eec & IXGBE_EEC_DO)
1574 data |= 1;
1575
1576 ixgbe_lower_eeprom_clk(hw, &eec);
1577 }
1578
1579 return data;
1580}
1581
1582/**
1583 * ixgbe_raise_eeprom_clk - Raises the EEPROM's clock input.
1584 * @hw: pointer to hardware structure
1585 * @eec: EEC register's current value
1586 **/
1587static void ixgbe_raise_eeprom_clk(struct ixgbe_hw *hw, u32 *eec)
1588{
1589 /*
1590 * Raise the clock input to the EEPROM
1591 * (setting the SK bit), then delay
1592 */
1593 *eec = *eec | IXGBE_EEC_SK;
1594 IXGBE_WRITE_REG(hw, IXGBE_EEC, *eec);
1595 IXGBE_WRITE_FLUSH(hw);
1596 udelay(1);
1597}
1598
1599/**
1600 * ixgbe_lower_eeprom_clk - Lowers the EEPROM's clock input.
1601 * @hw: pointer to hardware structure
1602 * @eecd: EECD's current value
1603 **/
1604static void ixgbe_lower_eeprom_clk(struct ixgbe_hw *hw, u32 *eec)
1605{
1606 /*
1607 * Lower the clock input to the EEPROM (clearing the SK bit), then
1608 * delay
1609 */
1610 *eec = *eec & ~IXGBE_EEC_SK;
1611 IXGBE_WRITE_REG(hw, IXGBE_EEC, *eec);
1612 IXGBE_WRITE_FLUSH(hw);
1613 udelay(1);
1614}
1615
1616/**
1617 * ixgbe_release_eeprom - Release EEPROM, release semaphores
1618 * @hw: pointer to hardware structure
1619 **/
1620static void ixgbe_release_eeprom(struct ixgbe_hw *hw)
1621{
1622 u32 eec;
1623
1624 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
1625
1626 eec |= IXGBE_EEC_CS; /* Pull CS high */
1627 eec &= ~IXGBE_EEC_SK; /* Lower SCK */
1628
1629 IXGBE_WRITE_REG(hw, IXGBE_EEC, eec);
1630 IXGBE_WRITE_FLUSH(hw);
1631
1632 udelay(1);
1633
1634 /* Stop requesting EEPROM access */
1635 eec &= ~IXGBE_EEC_REQ;
1636 IXGBE_WRITE_REG(hw, IXGBE_EEC, eec);
1637
1638 hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_EEP_SM);
1639
1640 /*
1641 * Delay before attempt to obtain semaphore again to allow FW
1642 * access. semaphore_delay is in ms we need us for usleep_range
1643 */
1644 usleep_range(hw->eeprom.semaphore_delay * 1000,
1645 hw->eeprom.semaphore_delay * 2000);
1646}
1647
1648/**
1649 * ixgbe_calc_eeprom_checksum_generic - Calculates and returns the checksum
1650 * @hw: pointer to hardware structure
1651 **/
1652u16 ixgbe_calc_eeprom_checksum_generic(struct ixgbe_hw *hw)
1653{
1654 u16 i;
1655 u16 j;
1656 u16 checksum = 0;
1657 u16 length = 0;
1658 u16 pointer = 0;
1659 u16 word = 0;
1660
1661 /* Include 0x0-0x3F in the checksum */
1662 for (i = 0; i < IXGBE_EEPROM_CHECKSUM; i++) {
1663 if (hw->eeprom.ops.read(hw, i, &word) != 0) {
1664 hw_dbg(hw, "EEPROM read failed\n");
1665 break;
1666 }
1667 checksum += word;
1668 }
1669
1670 /* Include all data from pointers except for the fw pointer */
1671 for (i = IXGBE_PCIE_ANALOG_PTR; i < IXGBE_FW_PTR; i++) {
1672 hw->eeprom.ops.read(hw, i, &pointer);
1673
1674 /* Make sure the pointer seems valid */
1675 if (pointer != 0xFFFF && pointer != 0) {
1676 hw->eeprom.ops.read(hw, pointer, &length);
1677
1678 if (length != 0xFFFF && length != 0) {
1679 for (j = pointer+1; j <= pointer+length; j++) {
1680 hw->eeprom.ops.read(hw, j, &word);
1681 checksum += word;
1682 }
1683 }
1684 }
1685 }
1686
1687 checksum = (u16)IXGBE_EEPROM_SUM - checksum;
1688
1689 return checksum;
1690}
1691
1692/**
1693 * ixgbe_validate_eeprom_checksum_generic - Validate EEPROM checksum
1694 * @hw: pointer to hardware structure
1695 * @checksum_val: calculated checksum
1696 *
1697 * Performs checksum calculation and validates the EEPROM checksum. If the
1698 * caller does not need checksum_val, the value can be NULL.
1699 **/
1700s32 ixgbe_validate_eeprom_checksum_generic(struct ixgbe_hw *hw,
1701 u16 *checksum_val)
1702{
1703 s32 status;
1704 u16 checksum;
1705 u16 read_checksum = 0;
1706
1707 /*
1708 * Read the first word from the EEPROM. If this times out or fails, do
1709 * not continue or we could be in for a very long wait while every
1710 * EEPROM read fails
1711 */
1712 status = hw->eeprom.ops.read(hw, 0, &checksum);
1713
1714 if (status == 0) {
1715 checksum = hw->eeprom.ops.calc_checksum(hw);
1716
1717 hw->eeprom.ops.read(hw, IXGBE_EEPROM_CHECKSUM, &read_checksum);
1718
1719 /*
1720 * Verify read checksum from EEPROM is the same as
1721 * calculated checksum
1722 */
1723 if (read_checksum != checksum)
1724 status = IXGBE_ERR_EEPROM_CHECKSUM;
1725
1726 /* If the user cares, return the calculated checksum */
1727 if (checksum_val)
1728 *checksum_val = checksum;
1729 } else {
1730 hw_dbg(hw, "EEPROM read failed\n");
1731 }
1732
1733 return status;
1734}
1735
1736/**
1737 * ixgbe_update_eeprom_checksum_generic - Updates the EEPROM checksum
1738 * @hw: pointer to hardware structure
1739 **/
1740s32 ixgbe_update_eeprom_checksum_generic(struct ixgbe_hw *hw)
1741{
1742 s32 status;
1743 u16 checksum;
1744
1745 /*
1746 * Read the first word from the EEPROM. If this times out or fails, do
1747 * not continue or we could be in for a very long wait while every
1748 * EEPROM read fails
1749 */
1750 status = hw->eeprom.ops.read(hw, 0, &checksum);
1751
1752 if (status == 0) {
1753 checksum = hw->eeprom.ops.calc_checksum(hw);
1754 status = hw->eeprom.ops.write(hw, IXGBE_EEPROM_CHECKSUM,
1755 checksum);
1756 } else {
1757 hw_dbg(hw, "EEPROM read failed\n");
1758 }
1759
1760 return status;
1761}
1762
1763/**
1764 * ixgbe_validate_mac_addr - Validate MAC address
1765 * @mac_addr: pointer to MAC address.
1766 *
1767 * Tests a MAC address to ensure it is a valid Individual Address
1768 **/
1769s32 ixgbe_validate_mac_addr(u8 *mac_addr)
1770{
1771 s32 status = 0;
1772
1773 /* Make sure it is not a multicast address */
1774 if (IXGBE_IS_MULTICAST(mac_addr))
1775 status = IXGBE_ERR_INVALID_MAC_ADDR;
1776 /* Not a broadcast address */
1777 else if (IXGBE_IS_BROADCAST(mac_addr))
1778 status = IXGBE_ERR_INVALID_MAC_ADDR;
1779 /* Reject the zero address */
1780 else if (mac_addr[0] == 0 && mac_addr[1] == 0 && mac_addr[2] == 0 &&
1781 mac_addr[3] == 0 && mac_addr[4] == 0 && mac_addr[5] == 0)
1782 status = IXGBE_ERR_INVALID_MAC_ADDR;
1783
1784 return status;
1785}
1786
1787/**
1788 * ixgbe_set_rar_generic - Set Rx address register
1789 * @hw: pointer to hardware structure
1790 * @index: Receive address register to write
1791 * @addr: Address to put into receive address register
1792 * @vmdq: VMDq "set" or "pool" index
1793 * @enable_addr: set flag that address is active
1794 *
1795 * Puts an ethernet address into a receive address register.
1796 **/
1797s32 ixgbe_set_rar_generic(struct ixgbe_hw *hw, u32 index, u8 *addr, u32 vmdq,
1798 u32 enable_addr)
1799{
1800 u32 rar_low, rar_high;
1801 u32 rar_entries = hw->mac.num_rar_entries;
1802
1803 /* Make sure we are using a valid rar index range */
1804 if (index >= rar_entries) {
1805 hw_dbg(hw, "RAR index %d is out of range.\n", index);
1806 return IXGBE_ERR_INVALID_ARGUMENT;
1807 }
1808
1809 /* setup VMDq pool selection before this RAR gets enabled */
1810 hw->mac.ops.set_vmdq(hw, index, vmdq);
1811
1812 /*
1813 * HW expects these in little endian so we reverse the byte
1814 * order from network order (big endian) to little endian
1815 */
1816 rar_low = ((u32)addr[0] |
1817 ((u32)addr[1] << 8) |
1818 ((u32)addr[2] << 16) |
1819 ((u32)addr[3] << 24));
1820 /*
1821 * Some parts put the VMDq setting in the extra RAH bits,
1822 * so save everything except the lower 16 bits that hold part
1823 * of the address and the address valid bit.
1824 */
1825 rar_high = IXGBE_READ_REG(hw, IXGBE_RAH(index));
1826 rar_high &= ~(0x0000FFFF | IXGBE_RAH_AV);
1827 rar_high |= ((u32)addr[4] | ((u32)addr[5] << 8));
1828
1829 if (enable_addr != 0)
1830 rar_high |= IXGBE_RAH_AV;
1831
1832 IXGBE_WRITE_REG(hw, IXGBE_RAL(index), rar_low);
1833 IXGBE_WRITE_REG(hw, IXGBE_RAH(index), rar_high);
1834
1835 return 0;
1836}
1837
1838/**
1839 * ixgbe_clear_rar_generic - Remove Rx address register
1840 * @hw: pointer to hardware structure
1841 * @index: Receive address register to write
1842 *
1843 * Clears an ethernet address from a receive address register.
1844 **/
1845s32 ixgbe_clear_rar_generic(struct ixgbe_hw *hw, u32 index)
1846{
1847 u32 rar_high;
1848 u32 rar_entries = hw->mac.num_rar_entries;
1849
1850 /* Make sure we are using a valid rar index range */
1851 if (index >= rar_entries) {
1852 hw_dbg(hw, "RAR index %d is out of range.\n", index);
1853 return IXGBE_ERR_INVALID_ARGUMENT;
1854 }
1855
1856 /*
1857 * Some parts put the VMDq setting in the extra RAH bits,
1858 * so save everything except the lower 16 bits that hold part
1859 * of the address and the address valid bit.
1860 */
1861 rar_high = IXGBE_READ_REG(hw, IXGBE_RAH(index));
1862 rar_high &= ~(0x0000FFFF | IXGBE_RAH_AV);
1863
1864 IXGBE_WRITE_REG(hw, IXGBE_RAL(index), 0);
1865 IXGBE_WRITE_REG(hw, IXGBE_RAH(index), rar_high);
1866
1867 /* clear VMDq pool/queue selection for this RAR */
1868 hw->mac.ops.clear_vmdq(hw, index, IXGBE_CLEAR_VMDQ_ALL);
1869
1870 return 0;
1871}
1872
1873/**
1874 * ixgbe_init_rx_addrs_generic - Initializes receive address filters.
1875 * @hw: pointer to hardware structure
1876 *
1877 * Places the MAC address in receive address register 0 and clears the rest
1878 * of the receive address registers. Clears the multicast table. Assumes
1879 * the receiver is in reset when the routine is called.
1880 **/
1881s32 ixgbe_init_rx_addrs_generic(struct ixgbe_hw *hw)
1882{
1883 u32 i;
1884 u32 rar_entries = hw->mac.num_rar_entries;
1885
1886 /*
1887 * If the current mac address is valid, assume it is a software override
1888 * to the permanent address.
1889 * Otherwise, use the permanent address from the eeprom.
1890 */
1891 if (ixgbe_validate_mac_addr(hw->mac.addr) ==
1892 IXGBE_ERR_INVALID_MAC_ADDR) {
1893 /* Get the MAC address from the RAR0 for later reference */
1894 hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
1895
1896 hw_dbg(hw, " Keeping Current RAR0 Addr =%pM\n", hw->mac.addr);
1897 } else {
1898 /* Setup the receive address. */
1899 hw_dbg(hw, "Overriding MAC Address in RAR[0]\n");
1900 hw_dbg(hw, " New MAC Addr =%pM\n", hw->mac.addr);
1901
1902 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
1903
1904 /* clear VMDq pool/queue selection for RAR 0 */
1905 hw->mac.ops.clear_vmdq(hw, 0, IXGBE_CLEAR_VMDQ_ALL);
1906 }
1907 hw->addr_ctrl.overflow_promisc = 0;
1908
1909 hw->addr_ctrl.rar_used_count = 1;
1910
1911 /* Zero out the other receive addresses. */
1912 hw_dbg(hw, "Clearing RAR[1-%d]\n", rar_entries - 1);
1913 for (i = 1; i < rar_entries; i++) {
1914 IXGBE_WRITE_REG(hw, IXGBE_RAL(i), 0);
1915 IXGBE_WRITE_REG(hw, IXGBE_RAH(i), 0);
1916 }
1917
1918 /* Clear the MTA */
1919 hw->addr_ctrl.mta_in_use = 0;
1920 IXGBE_WRITE_REG(hw, IXGBE_MCSTCTRL, hw->mac.mc_filter_type);
1921
1922 hw_dbg(hw, " Clearing MTA\n");
1923 for (i = 0; i < hw->mac.mcft_size; i++)
1924 IXGBE_WRITE_REG(hw, IXGBE_MTA(i), 0);
1925
1926 if (hw->mac.ops.init_uta_tables)
1927 hw->mac.ops.init_uta_tables(hw);
1928
1929 return 0;
1930}
1931
1932/**
1933 * ixgbe_mta_vector - Determines bit-vector in multicast table to set
1934 * @hw: pointer to hardware structure
1935 * @mc_addr: the multicast address
1936 *
1937 * Extracts the 12 bits, from a multicast address, to determine which
1938 * bit-vector to set in the multicast table. The hardware uses 12 bits, from
1939 * incoming rx multicast addresses, to determine the bit-vector to check in
1940 * the MTA. Which of the 4 combination, of 12-bits, the hardware uses is set
1941 * by the MO field of the MCSTCTRL. The MO field is set during initialization
1942 * to mc_filter_type.
1943 **/
1944static s32 ixgbe_mta_vector(struct ixgbe_hw *hw, u8 *mc_addr)
1945{
1946 u32 vector = 0;
1947
1948 switch (hw->mac.mc_filter_type) {
1949 case 0: /* use bits [47:36] of the address */
1950 vector = ((mc_addr[4] >> 4) | (((u16)mc_addr[5]) << 4));
1951 break;
1952 case 1: /* use bits [46:35] of the address */
1953 vector = ((mc_addr[4] >> 3) | (((u16)mc_addr[5]) << 5));
1954 break;
1955 case 2: /* use bits [45:34] of the address */
1956 vector = ((mc_addr[4] >> 2) | (((u16)mc_addr[5]) << 6));
1957 break;
1958 case 3: /* use bits [43:32] of the address */
1959 vector = ((mc_addr[4]) | (((u16)mc_addr[5]) << 8));
1960 break;
1961 default: /* Invalid mc_filter_type */
1962 hw_dbg(hw, "MC filter type param set incorrectly\n");
1963 break;
1964 }
1965
1966 /* vector can only be 12-bits or boundary will be exceeded */
1967 vector &= 0xFFF;
1968 return vector;
1969}
1970
1971/**
1972 * ixgbe_set_mta - Set bit-vector in multicast table
1973 * @hw: pointer to hardware structure
1974 * @hash_value: Multicast address hash value
1975 *
1976 * Sets the bit-vector in the multicast table.
1977 **/
1978static void ixgbe_set_mta(struct ixgbe_hw *hw, u8 *mc_addr)
1979{
1980 u32 vector;
1981 u32 vector_bit;
1982 u32 vector_reg;
1983
1984 hw->addr_ctrl.mta_in_use++;
1985
1986 vector = ixgbe_mta_vector(hw, mc_addr);
1987 hw_dbg(hw, " bit-vector = 0x%03X\n", vector);
1988
1989 /*
1990 * The MTA is a register array of 128 32-bit registers. It is treated
1991 * like an array of 4096 bits. We want to set bit
1992 * BitArray[vector_value]. So we figure out what register the bit is
1993 * in, read it, OR in the new bit, then write back the new value. The
1994 * register is determined by the upper 7 bits of the vector value and
1995 * the bit within that register are determined by the lower 5 bits of
1996 * the value.
1997 */
1998 vector_reg = (vector >> 5) & 0x7F;
1999 vector_bit = vector & 0x1F;
2000 hw->mac.mta_shadow[vector_reg] |= (1 << vector_bit);
2001}
2002
2003/**
2004 * ixgbe_update_mc_addr_list_generic - Updates MAC list of multicast addresses
2005 * @hw: pointer to hardware structure
2006 * @netdev: pointer to net device structure
2007 *
2008 * The given list replaces any existing list. Clears the MC addrs from receive
2009 * address registers and the multicast table. Uses unused receive address
2010 * registers for the first multicast addresses, and hashes the rest into the
2011 * multicast table.
2012 **/
2013s32 ixgbe_update_mc_addr_list_generic(struct ixgbe_hw *hw,
2014 struct net_device *netdev)
2015{
2016 struct netdev_hw_addr *ha;
2017 u32 i;
2018
2019 /*
2020 * Set the new number of MC addresses that we are being requested to
2021 * use.
2022 */
2023 hw->addr_ctrl.num_mc_addrs = netdev_mc_count(netdev);
2024 hw->addr_ctrl.mta_in_use = 0;
2025
2026 /* Clear mta_shadow */
2027 hw_dbg(hw, " Clearing MTA\n");
2028 memset(&hw->mac.mta_shadow, 0, sizeof(hw->mac.mta_shadow));
2029
2030 /* Update mta shadow */
2031 netdev_for_each_mc_addr(ha, netdev) {
2032 hw_dbg(hw, " Adding the multicast addresses:\n");
2033 ixgbe_set_mta(hw, ha->addr);
2034 }
2035
2036 /* Enable mta */
2037 for (i = 0; i < hw->mac.mcft_size; i++)
2038 IXGBE_WRITE_REG_ARRAY(hw, IXGBE_MTA(0), i,
2039 hw->mac.mta_shadow[i]);
2040
2041 if (hw->addr_ctrl.mta_in_use > 0)
2042 IXGBE_WRITE_REG(hw, IXGBE_MCSTCTRL,
2043 IXGBE_MCSTCTRL_MFE | hw->mac.mc_filter_type);
2044
2045 hw_dbg(hw, "ixgbe_update_mc_addr_list_generic Complete\n");
2046 return 0;
2047}
2048
2049/**
2050 * ixgbe_enable_mc_generic - Enable multicast address in RAR
2051 * @hw: pointer to hardware structure
2052 *
2053 * Enables multicast address in RAR and the use of the multicast hash table.
2054 **/
2055s32 ixgbe_enable_mc_generic(struct ixgbe_hw *hw)
2056{
2057 struct ixgbe_addr_filter_info *a = &hw->addr_ctrl;
2058
2059 if (a->mta_in_use > 0)
2060 IXGBE_WRITE_REG(hw, IXGBE_MCSTCTRL, IXGBE_MCSTCTRL_MFE |
2061 hw->mac.mc_filter_type);
2062
2063 return 0;
2064}
2065
2066/**
2067 * ixgbe_disable_mc_generic - Disable multicast address in RAR
2068 * @hw: pointer to hardware structure
2069 *
2070 * Disables multicast address in RAR and the use of the multicast hash table.
2071 **/
2072s32 ixgbe_disable_mc_generic(struct ixgbe_hw *hw)
2073{
2074 struct ixgbe_addr_filter_info *a = &hw->addr_ctrl;
2075
2076 if (a->mta_in_use > 0)
2077 IXGBE_WRITE_REG(hw, IXGBE_MCSTCTRL, hw->mac.mc_filter_type);
2078
2079 return 0;
2080}
2081
2082/**
2083 * ixgbe_fc_enable_generic - Enable flow control
2084 * @hw: pointer to hardware structure
2085 *
2086 * Enable flow control according to the current settings.
2087 **/
2088s32 ixgbe_fc_enable_generic(struct ixgbe_hw *hw)
2089{
2090 s32 ret_val = 0;
2091 u32 mflcn_reg, fccfg_reg;
2092 u32 reg;
2093 u32 fcrtl, fcrth;
2094 int i;
2095
2096 /*
2097 * Validate the water mark configuration for packet buffer 0. Zero
2098 * water marks indicate that the packet buffer was not configured
2099 * and the watermarks for packet buffer 0 should always be configured.
2100 */
2101 if (!hw->fc.low_water ||
2102 !hw->fc.high_water[0] ||
2103 !hw->fc.pause_time) {
2104 hw_dbg(hw, "Invalid water mark configuration\n");
2105 ret_val = IXGBE_ERR_INVALID_LINK_SETTINGS;
2106 goto out;
2107 }
2108
2109 /* Negotiate the fc mode to use */
2110 ixgbe_fc_autoneg(hw);
2111
2112 /* Disable any previous flow control settings */
2113 mflcn_reg = IXGBE_READ_REG(hw, IXGBE_MFLCN);
2114 mflcn_reg &= ~(IXGBE_MFLCN_RPFCE_MASK | IXGBE_MFLCN_RFCE);
2115
2116 fccfg_reg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
2117 fccfg_reg &= ~(IXGBE_FCCFG_TFCE_802_3X | IXGBE_FCCFG_TFCE_PRIORITY);
2118
2119 /*
2120 * The possible values of fc.current_mode are:
2121 * 0: Flow control is completely disabled
2122 * 1: Rx flow control is enabled (we can receive pause frames,
2123 * but not send pause frames).
2124 * 2: Tx flow control is enabled (we can send pause frames but
2125 * we do not support receiving pause frames).
2126 * 3: Both Rx and Tx flow control (symmetric) are enabled.
2127 * other: Invalid.
2128 */
2129 switch (hw->fc.current_mode) {
2130 case ixgbe_fc_none:
2131 /*
2132 * Flow control is disabled by software override or autoneg.
2133 * The code below will actually disable it in the HW.
2134 */
2135 break;
2136 case ixgbe_fc_rx_pause:
2137 /*
2138 * Rx Flow control is enabled and Tx Flow control is
2139 * disabled by software override. Since there really
2140 * isn't a way to advertise that we are capable of RX
2141 * Pause ONLY, we will advertise that we support both
2142 * symmetric and asymmetric Rx PAUSE. Later, we will
2143 * disable the adapter's ability to send PAUSE frames.
2144 */
2145 mflcn_reg |= IXGBE_MFLCN_RFCE;
2146 break;
2147 case ixgbe_fc_tx_pause:
2148 /*
2149 * Tx Flow control is enabled, and Rx Flow control is
2150 * disabled by software override.
2151 */
2152 fccfg_reg |= IXGBE_FCCFG_TFCE_802_3X;
2153 break;
2154 case ixgbe_fc_full:
2155 /* Flow control (both Rx and Tx) is enabled by SW override. */
2156 mflcn_reg |= IXGBE_MFLCN_RFCE;
2157 fccfg_reg |= IXGBE_FCCFG_TFCE_802_3X;
2158 break;
2159 default:
2160 hw_dbg(hw, "Flow control param set incorrectly\n");
2161 ret_val = IXGBE_ERR_CONFIG;
2162 goto out;
2163 break;
2164 }
2165
2166 /* Set 802.3x based flow control settings. */
2167 mflcn_reg |= IXGBE_MFLCN_DPF;
2168 IXGBE_WRITE_REG(hw, IXGBE_MFLCN, mflcn_reg);
2169 IXGBE_WRITE_REG(hw, IXGBE_FCCFG, fccfg_reg);
2170
2171 fcrtl = (hw->fc.low_water << 10) | IXGBE_FCRTL_XONE;
2172
2173 /* Set up and enable Rx high/low water mark thresholds, enable XON. */
2174 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
2175 if ((hw->fc.current_mode & ixgbe_fc_tx_pause) &&
2176 hw->fc.high_water[i]) {
2177 IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), fcrtl);
2178 fcrth = (hw->fc.high_water[i] << 10) | IXGBE_FCRTH_FCEN;
2179 } else {
2180 IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), 0);
2181 /*
2182 * In order to prevent Tx hangs when the internal Tx
2183 * switch is enabled we must set the high water mark
2184 * to the maximum FCRTH value. This allows the Tx
2185 * switch to function even under heavy Rx workloads.
2186 */
2187 fcrth = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(i)) - 32;
2188 }
2189
2190 IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), fcrth);
2191 }
2192
2193 /* Configure pause time (2 TCs per register) */
2194 reg = hw->fc.pause_time * 0x00010001;
2195 for (i = 0; i < (MAX_TRAFFIC_CLASS / 2); i++)
2196 IXGBE_WRITE_REG(hw, IXGBE_FCTTV(i), reg);
2197
2198 IXGBE_WRITE_REG(hw, IXGBE_FCRTV, hw->fc.pause_time / 2);
2199
2200out:
2201 return ret_val;
2202}
2203
2204/**
2205 * ixgbe_negotiate_fc - Negotiate flow control
2206 * @hw: pointer to hardware structure
2207 * @adv_reg: flow control advertised settings
2208 * @lp_reg: link partner's flow control settings
2209 * @adv_sym: symmetric pause bit in advertisement
2210 * @adv_asm: asymmetric pause bit in advertisement
2211 * @lp_sym: symmetric pause bit in link partner advertisement
2212 * @lp_asm: asymmetric pause bit in link partner advertisement
2213 *
2214 * Find the intersection between advertised settings and link partner's
2215 * advertised settings
2216 **/
2217static s32 ixgbe_negotiate_fc(struct ixgbe_hw *hw, u32 adv_reg, u32 lp_reg,
2218 u32 adv_sym, u32 adv_asm, u32 lp_sym, u32 lp_asm)
2219{
2220 if ((!(adv_reg)) || (!(lp_reg)))
2221 return IXGBE_ERR_FC_NOT_NEGOTIATED;
2222
2223 if ((adv_reg & adv_sym) && (lp_reg & lp_sym)) {
2224 /*
2225 * Now we need to check if the user selected Rx ONLY
2226 * of pause frames. In this case, we had to advertise
2227 * FULL flow control because we could not advertise RX
2228 * ONLY. Hence, we must now check to see if we need to
2229 * turn OFF the TRANSMISSION of PAUSE frames.
2230 */
2231 if (hw->fc.requested_mode == ixgbe_fc_full) {
2232 hw->fc.current_mode = ixgbe_fc_full;
2233 hw_dbg(hw, "Flow Control = FULL.\n");
2234 } else {
2235 hw->fc.current_mode = ixgbe_fc_rx_pause;
2236 hw_dbg(hw, "Flow Control=RX PAUSE frames only\n");
2237 }
2238 } else if (!(adv_reg & adv_sym) && (adv_reg & adv_asm) &&
2239 (lp_reg & lp_sym) && (lp_reg & lp_asm)) {
2240 hw->fc.current_mode = ixgbe_fc_tx_pause;
2241 hw_dbg(hw, "Flow Control = TX PAUSE frames only.\n");
2242 } else if ((adv_reg & adv_sym) && (adv_reg & adv_asm) &&
2243 !(lp_reg & lp_sym) && (lp_reg & lp_asm)) {
2244 hw->fc.current_mode = ixgbe_fc_rx_pause;
2245 hw_dbg(hw, "Flow Control = RX PAUSE frames only.\n");
2246 } else {
2247 hw->fc.current_mode = ixgbe_fc_none;
2248 hw_dbg(hw, "Flow Control = NONE.\n");
2249 }
2250 return 0;
2251}
2252
2253/**
2254 * ixgbe_fc_autoneg_fiber - Enable flow control on 1 gig fiber
2255 * @hw: pointer to hardware structure
2256 *
2257 * Enable flow control according on 1 gig fiber.
2258 **/
2259static s32 ixgbe_fc_autoneg_fiber(struct ixgbe_hw *hw)
2260{
2261 u32 pcs_anadv_reg, pcs_lpab_reg, linkstat;
2262 s32 ret_val = IXGBE_ERR_FC_NOT_NEGOTIATED;
2263
2264 /*
2265 * On multispeed fiber at 1g, bail out if
2266 * - link is up but AN did not complete, or if
2267 * - link is up and AN completed but timed out
2268 */
2269
2270 linkstat = IXGBE_READ_REG(hw, IXGBE_PCS1GLSTA);
2271 if ((!!(linkstat & IXGBE_PCS1GLSTA_AN_COMPLETE) == 0) ||
2272 (!!(linkstat & IXGBE_PCS1GLSTA_AN_TIMED_OUT) == 1))
2273 goto out;
2274
2275 pcs_anadv_reg = IXGBE_READ_REG(hw, IXGBE_PCS1GANA);
2276 pcs_lpab_reg = IXGBE_READ_REG(hw, IXGBE_PCS1GANLP);
2277
2278 ret_val = ixgbe_negotiate_fc(hw, pcs_anadv_reg,
2279 pcs_lpab_reg, IXGBE_PCS1GANA_SYM_PAUSE,
2280 IXGBE_PCS1GANA_ASM_PAUSE,
2281 IXGBE_PCS1GANA_SYM_PAUSE,
2282 IXGBE_PCS1GANA_ASM_PAUSE);
2283
2284out:
2285 return ret_val;
2286}
2287
2288/**
2289 * ixgbe_fc_autoneg_backplane - Enable flow control IEEE clause 37
2290 * @hw: pointer to hardware structure
2291 *
2292 * Enable flow control according to IEEE clause 37.
2293 **/
2294static s32 ixgbe_fc_autoneg_backplane(struct ixgbe_hw *hw)
2295{
2296 u32 links2, anlp1_reg, autoc_reg, links;
2297 s32 ret_val = IXGBE_ERR_FC_NOT_NEGOTIATED;
2298
2299 /*
2300 * On backplane, bail out if
2301 * - backplane autoneg was not completed, or if
2302 * - we are 82599 and link partner is not AN enabled
2303 */
2304 links = IXGBE_READ_REG(hw, IXGBE_LINKS);
2305 if ((links & IXGBE_LINKS_KX_AN_COMP) == 0)
2306 goto out;
2307
2308 if (hw->mac.type == ixgbe_mac_82599EB) {
2309 links2 = IXGBE_READ_REG(hw, IXGBE_LINKS2);
2310 if ((links2 & IXGBE_LINKS2_AN_SUPPORTED) == 0)
2311 goto out;
2312 }
2313 /*
2314 * Read the 10g AN autoc and LP ability registers and resolve
2315 * local flow control settings accordingly
2316 */
2317 autoc_reg = IXGBE_READ_REG(hw, IXGBE_AUTOC);
2318 anlp1_reg = IXGBE_READ_REG(hw, IXGBE_ANLP1);
2319
2320 ret_val = ixgbe_negotiate_fc(hw, autoc_reg,
2321 anlp1_reg, IXGBE_AUTOC_SYM_PAUSE, IXGBE_AUTOC_ASM_PAUSE,
2322 IXGBE_ANLP1_SYM_PAUSE, IXGBE_ANLP1_ASM_PAUSE);
2323
2324out:
2325 return ret_val;
2326}
2327
2328/**
2329 * ixgbe_fc_autoneg_copper - Enable flow control IEEE clause 37
2330 * @hw: pointer to hardware structure
2331 *
2332 * Enable flow control according to IEEE clause 37.
2333 **/
2334static s32 ixgbe_fc_autoneg_copper(struct ixgbe_hw *hw)
2335{
2336 u16 technology_ability_reg = 0;
2337 u16 lp_technology_ability_reg = 0;
2338
2339 hw->phy.ops.read_reg(hw, MDIO_AN_ADVERTISE,
2340 MDIO_MMD_AN,
2341 &technology_ability_reg);
2342 hw->phy.ops.read_reg(hw, MDIO_AN_LPA,
2343 MDIO_MMD_AN,
2344 &lp_technology_ability_reg);
2345
2346 return ixgbe_negotiate_fc(hw, (u32)technology_ability_reg,
2347 (u32)lp_technology_ability_reg,
2348 IXGBE_TAF_SYM_PAUSE, IXGBE_TAF_ASM_PAUSE,
2349 IXGBE_TAF_SYM_PAUSE, IXGBE_TAF_ASM_PAUSE);
2350}
2351
2352/**
2353 * ixgbe_fc_autoneg - Configure flow control
2354 * @hw: pointer to hardware structure
2355 *
2356 * Compares our advertised flow control capabilities to those advertised by
2357 * our link partner, and determines the proper flow control mode to use.
2358 **/
2359void ixgbe_fc_autoneg(struct ixgbe_hw *hw)
2360{
2361 s32 ret_val = IXGBE_ERR_FC_NOT_NEGOTIATED;
2362 ixgbe_link_speed speed;
2363 bool link_up;
2364
2365 /*
2366 * AN should have completed when the cable was plugged in.
2367 * Look for reasons to bail out. Bail out if:
2368 * - FC autoneg is disabled, or if
2369 * - link is not up.
2370 *
2371 * Since we're being called from an LSC, link is already known to be up.
2372 * So use link_up_wait_to_complete=false.
2373 */
2374 if (hw->fc.disable_fc_autoneg)
2375 goto out;
2376
2377 hw->mac.ops.check_link(hw, &speed, &link_up, false);
2378 if (!link_up)
2379 goto out;
2380
2381 switch (hw->phy.media_type) {
2382 /* Autoneg flow control on fiber adapters */
2383 case ixgbe_media_type_fiber:
2384 if (speed == IXGBE_LINK_SPEED_1GB_FULL)
2385 ret_val = ixgbe_fc_autoneg_fiber(hw);
2386 break;
2387
2388 /* Autoneg flow control on backplane adapters */
2389 case ixgbe_media_type_backplane:
2390 ret_val = ixgbe_fc_autoneg_backplane(hw);
2391 break;
2392
2393 /* Autoneg flow control on copper adapters */
2394 case ixgbe_media_type_copper:
2395 if (ixgbe_device_supports_autoneg_fc(hw) == 0)
2396 ret_val = ixgbe_fc_autoneg_copper(hw);
2397 break;
2398
2399 default:
2400 break;
2401 }
2402
2403out:
2404 if (ret_val == 0) {
2405 hw->fc.fc_was_autonegged = true;
2406 } else {
2407 hw->fc.fc_was_autonegged = false;
2408 hw->fc.current_mode = hw->fc.requested_mode;
2409 }
2410}
2411
2412/**
2413 * ixgbe_disable_pcie_master - Disable PCI-express master access
2414 * @hw: pointer to hardware structure
2415 *
2416 * Disables PCI-Express master access and verifies there are no pending
2417 * requests. IXGBE_ERR_MASTER_REQUESTS_PENDING is returned if master disable
2418 * bit hasn't caused the master requests to be disabled, else 0
2419 * is returned signifying master requests disabled.
2420 **/
2421static s32 ixgbe_disable_pcie_master(struct ixgbe_hw *hw)
2422{
2423 struct ixgbe_adapter *adapter = hw->back;
2424 s32 status = 0;
2425 u32 i;
2426 u16 value;
2427
2428 /* Always set this bit to ensure any future transactions are blocked */
2429 IXGBE_WRITE_REG(hw, IXGBE_CTRL, IXGBE_CTRL_GIO_DIS);
2430
2431 /* Exit if master requests are blocked */
2432 if (!(IXGBE_READ_REG(hw, IXGBE_STATUS) & IXGBE_STATUS_GIO))
2433 goto out;
2434
2435 /* Poll for master request bit to clear */
2436 for (i = 0; i < IXGBE_PCI_MASTER_DISABLE_TIMEOUT; i++) {
2437 udelay(100);
2438 if (!(IXGBE_READ_REG(hw, IXGBE_STATUS) & IXGBE_STATUS_GIO))
2439 goto out;
2440 }
2441
2442 /*
2443 * Two consecutive resets are required via CTRL.RST per datasheet
2444 * 5.2.5.3.2 Master Disable. We set a flag to inform the reset routine
2445 * of this need. The first reset prevents new master requests from
2446 * being issued by our device. We then must wait 1usec or more for any
2447 * remaining completions from the PCIe bus to trickle in, and then reset
2448 * again to clear out any effects they may have had on our device.
2449 */
2450 hw_dbg(hw, "GIO Master Disable bit didn't clear - requesting resets\n");
2451 hw->mac.flags |= IXGBE_FLAGS_DOUBLE_RESET_REQUIRED;
2452
2453 /*
2454 * Before proceeding, make sure that the PCIe block does not have
2455 * transactions pending.
2456 */
2457 for (i = 0; i < IXGBE_PCI_MASTER_DISABLE_TIMEOUT; i++) {
2458 udelay(100);
2459 pci_read_config_word(adapter->pdev, IXGBE_PCI_DEVICE_STATUS,
2460 &value);
2461 if (!(value & IXGBE_PCI_DEVICE_STATUS_TRANSACTION_PENDING))
2462 goto out;
2463 }
2464
2465 hw_dbg(hw, "PCIe transaction pending bit also did not clear.\n");
2466 status = IXGBE_ERR_MASTER_REQUESTS_PENDING;
2467
2468out:
2469 return status;
2470}
2471
2472/**
2473 * ixgbe_acquire_swfw_sync - Acquire SWFW semaphore
2474 * @hw: pointer to hardware structure
2475 * @mask: Mask to specify which semaphore to acquire
2476 *
2477 * Acquires the SWFW semaphore through the GSSR register for the specified
2478 * function (CSR, PHY0, PHY1, EEPROM, Flash)
2479 **/
2480s32 ixgbe_acquire_swfw_sync(struct ixgbe_hw *hw, u16 mask)
2481{
2482 u32 gssr;
2483 u32 swmask = mask;
2484 u32 fwmask = mask << 5;
2485 s32 timeout = 200;
2486
2487 while (timeout) {
2488 /*
2489 * SW EEPROM semaphore bit is used for access to all
2490 * SW_FW_SYNC/GSSR bits (not just EEPROM)
2491 */
2492 if (ixgbe_get_eeprom_semaphore(hw))
2493 return IXGBE_ERR_SWFW_SYNC;
2494
2495 gssr = IXGBE_READ_REG(hw, IXGBE_GSSR);
2496 if (!(gssr & (fwmask | swmask)))
2497 break;
2498
2499 /*
2500 * Firmware currently using resource (fwmask) or other software
2501 * thread currently using resource (swmask)
2502 */
2503 ixgbe_release_eeprom_semaphore(hw);
2504 usleep_range(5000, 10000);
2505 timeout--;
2506 }
2507
2508 if (!timeout) {
2509 hw_dbg(hw, "Driver can't access resource, SW_FW_SYNC timeout.\n");
2510 return IXGBE_ERR_SWFW_SYNC;
2511 }
2512
2513 gssr |= swmask;
2514 IXGBE_WRITE_REG(hw, IXGBE_GSSR, gssr);
2515
2516 ixgbe_release_eeprom_semaphore(hw);
2517 return 0;
2518}
2519
2520/**
2521 * ixgbe_release_swfw_sync - Release SWFW semaphore
2522 * @hw: pointer to hardware structure
2523 * @mask: Mask to specify which semaphore to release
2524 *
2525 * Releases the SWFW semaphore through the GSSR register for the specified
2526 * function (CSR, PHY0, PHY1, EEPROM, Flash)
2527 **/
2528void ixgbe_release_swfw_sync(struct ixgbe_hw *hw, u16 mask)
2529{
2530 u32 gssr;
2531 u32 swmask = mask;
2532
2533 ixgbe_get_eeprom_semaphore(hw);
2534
2535 gssr = IXGBE_READ_REG(hw, IXGBE_GSSR);
2536 gssr &= ~swmask;
2537 IXGBE_WRITE_REG(hw, IXGBE_GSSR, gssr);
2538
2539 ixgbe_release_eeprom_semaphore(hw);
2540}
2541
2542/**
2543 * ixgbe_disable_rx_buff_generic - Stops the receive data path
2544 * @hw: pointer to hardware structure
2545 *
2546 * Stops the receive data path and waits for the HW to internally
2547 * empty the Rx security block.
2548 **/
2549s32 ixgbe_disable_rx_buff_generic(struct ixgbe_hw *hw)
2550{
2551#define IXGBE_MAX_SECRX_POLL 40
2552 int i;
2553 int secrxreg;
2554
2555 secrxreg = IXGBE_READ_REG(hw, IXGBE_SECRXCTRL);
2556 secrxreg |= IXGBE_SECRXCTRL_RX_DIS;
2557 IXGBE_WRITE_REG(hw, IXGBE_SECRXCTRL, secrxreg);
2558 for (i = 0; i < IXGBE_MAX_SECRX_POLL; i++) {
2559 secrxreg = IXGBE_READ_REG(hw, IXGBE_SECRXSTAT);
2560 if (secrxreg & IXGBE_SECRXSTAT_SECRX_RDY)
2561 break;
2562 else
2563 /* Use interrupt-safe sleep just in case */
2564 udelay(1000);
2565 }
2566
2567 /* For informational purposes only */
2568 if (i >= IXGBE_MAX_SECRX_POLL)
2569 hw_dbg(hw, "Rx unit being enabled before security "
2570 "path fully disabled. Continuing with init.\n");
2571
2572 return 0;
2573
2574}
2575
2576/**
2577 * ixgbe_enable_rx_buff - Enables the receive data path
2578 * @hw: pointer to hardware structure
2579 *
2580 * Enables the receive data path
2581 **/
2582s32 ixgbe_enable_rx_buff_generic(struct ixgbe_hw *hw)
2583{
2584 int secrxreg;
2585
2586 secrxreg = IXGBE_READ_REG(hw, IXGBE_SECRXCTRL);
2587 secrxreg &= ~IXGBE_SECRXCTRL_RX_DIS;
2588 IXGBE_WRITE_REG(hw, IXGBE_SECRXCTRL, secrxreg);
2589 IXGBE_WRITE_FLUSH(hw);
2590
2591 return 0;
2592}
2593
2594/**
2595 * ixgbe_enable_rx_dma_generic - Enable the Rx DMA unit
2596 * @hw: pointer to hardware structure
2597 * @regval: register value to write to RXCTRL
2598 *
2599 * Enables the Rx DMA unit
2600 **/
2601s32 ixgbe_enable_rx_dma_generic(struct ixgbe_hw *hw, u32 regval)
2602{
2603 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, regval);
2604
2605 return 0;
2606}
2607
2608/**
2609 * ixgbe_blink_led_start_generic - Blink LED based on index.
2610 * @hw: pointer to hardware structure
2611 * @index: led number to blink
2612 **/
2613s32 ixgbe_blink_led_start_generic(struct ixgbe_hw *hw, u32 index)
2614{
2615 ixgbe_link_speed speed = 0;
2616 bool link_up = false;
2617 u32 autoc_reg = IXGBE_READ_REG(hw, IXGBE_AUTOC);
2618 u32 led_reg = IXGBE_READ_REG(hw, IXGBE_LEDCTL);
2619
2620 /*
2621 * Link must be up to auto-blink the LEDs;
2622 * Force it if link is down.
2623 */
2624 hw->mac.ops.check_link(hw, &speed, &link_up, false);
2625
2626 if (!link_up) {
2627 autoc_reg |= IXGBE_AUTOC_AN_RESTART;
2628 autoc_reg |= IXGBE_AUTOC_FLU;
2629 IXGBE_WRITE_REG(hw, IXGBE_AUTOC, autoc_reg);
2630 IXGBE_WRITE_FLUSH(hw);
2631 usleep_range(10000, 20000);
2632 }
2633
2634 led_reg &= ~IXGBE_LED_MODE_MASK(index);
2635 led_reg |= IXGBE_LED_BLINK(index);
2636 IXGBE_WRITE_REG(hw, IXGBE_LEDCTL, led_reg);
2637 IXGBE_WRITE_FLUSH(hw);
2638
2639 return 0;
2640}
2641
2642/**
2643 * ixgbe_blink_led_stop_generic - Stop blinking LED based on index.
2644 * @hw: pointer to hardware structure
2645 * @index: led number to stop blinking
2646 **/
2647s32 ixgbe_blink_led_stop_generic(struct ixgbe_hw *hw, u32 index)
2648{
2649 u32 autoc_reg = IXGBE_READ_REG(hw, IXGBE_AUTOC);
2650 u32 led_reg = IXGBE_READ_REG(hw, IXGBE_LEDCTL);
2651
2652 autoc_reg &= ~IXGBE_AUTOC_FLU;
2653 autoc_reg |= IXGBE_AUTOC_AN_RESTART;
2654 IXGBE_WRITE_REG(hw, IXGBE_AUTOC, autoc_reg);
2655
2656 led_reg &= ~IXGBE_LED_MODE_MASK(index);
2657 led_reg &= ~IXGBE_LED_BLINK(index);
2658 led_reg |= IXGBE_LED_LINK_ACTIVE << IXGBE_LED_MODE_SHIFT(index);
2659 IXGBE_WRITE_REG(hw, IXGBE_LEDCTL, led_reg);
2660 IXGBE_WRITE_FLUSH(hw);
2661
2662 return 0;
2663}
2664
2665/**
2666 * ixgbe_get_san_mac_addr_offset - Get SAN MAC address offset from the EEPROM
2667 * @hw: pointer to hardware structure
2668 * @san_mac_offset: SAN MAC address offset
2669 *
2670 * This function will read the EEPROM location for the SAN MAC address
2671 * pointer, and returns the value at that location. This is used in both
2672 * get and set mac_addr routines.
2673 **/
2674static s32 ixgbe_get_san_mac_addr_offset(struct ixgbe_hw *hw,
2675 u16 *san_mac_offset)
2676{
2677 /*
2678 * First read the EEPROM pointer to see if the MAC addresses are
2679 * available.
2680 */
2681 hw->eeprom.ops.read(hw, IXGBE_SAN_MAC_ADDR_PTR, san_mac_offset);
2682
2683 return 0;
2684}
2685
2686/**
2687 * ixgbe_get_san_mac_addr_generic - SAN MAC address retrieval from the EEPROM
2688 * @hw: pointer to hardware structure
2689 * @san_mac_addr: SAN MAC address
2690 *
2691 * Reads the SAN MAC address from the EEPROM, if it's available. This is
2692 * per-port, so set_lan_id() must be called before reading the addresses.
2693 * set_lan_id() is called by identify_sfp(), but this cannot be relied
2694 * upon for non-SFP connections, so we must call it here.
2695 **/
2696s32 ixgbe_get_san_mac_addr_generic(struct ixgbe_hw *hw, u8 *san_mac_addr)
2697{
2698 u16 san_mac_data, san_mac_offset;
2699 u8 i;
2700
2701 /*
2702 * First read the EEPROM pointer to see if the MAC addresses are
2703 * available. If they're not, no point in calling set_lan_id() here.
2704 */
2705 ixgbe_get_san_mac_addr_offset(hw, &san_mac_offset);
2706
2707 if ((san_mac_offset == 0) || (san_mac_offset == 0xFFFF)) {
2708 /*
2709 * No addresses available in this EEPROM. It's not an
2710 * error though, so just wipe the local address and return.
2711 */
2712 for (i = 0; i < 6; i++)
2713 san_mac_addr[i] = 0xFF;
2714
2715 goto san_mac_addr_out;
2716 }
2717
2718 /* make sure we know which port we need to program */
2719 hw->mac.ops.set_lan_id(hw);
2720 /* apply the port offset to the address offset */
2721 (hw->bus.func) ? (san_mac_offset += IXGBE_SAN_MAC_ADDR_PORT1_OFFSET) :
2722 (san_mac_offset += IXGBE_SAN_MAC_ADDR_PORT0_OFFSET);
2723 for (i = 0; i < 3; i++) {
2724 hw->eeprom.ops.read(hw, san_mac_offset, &san_mac_data);
2725 san_mac_addr[i * 2] = (u8)(san_mac_data);
2726 san_mac_addr[i * 2 + 1] = (u8)(san_mac_data >> 8);
2727 san_mac_offset++;
2728 }
2729
2730san_mac_addr_out:
2731 return 0;
2732}
2733
2734/**
2735 * ixgbe_get_pcie_msix_count_generic - Gets MSI-X vector count
2736 * @hw: pointer to hardware structure
2737 *
2738 * Read PCIe configuration space, and get the MSI-X vector count from
2739 * the capabilities table.
2740 **/
2741u16 ixgbe_get_pcie_msix_count_generic(struct ixgbe_hw *hw)
2742{
2743 struct ixgbe_adapter *adapter = hw->back;
2744 u16 msix_count = 1;
2745 u16 max_msix_count;
2746 u16 pcie_offset;
2747
2748 switch (hw->mac.type) {
2749 case ixgbe_mac_82598EB:
2750 pcie_offset = IXGBE_PCIE_MSIX_82598_CAPS;
2751 max_msix_count = IXGBE_MAX_MSIX_VECTORS_82598;
2752 break;
2753 case ixgbe_mac_82599EB:
2754 case ixgbe_mac_X540:
2755 pcie_offset = IXGBE_PCIE_MSIX_82599_CAPS;
2756 max_msix_count = IXGBE_MAX_MSIX_VECTORS_82599;
2757 break;
2758 default:
2759 return msix_count;
2760 }
2761
2762 pci_read_config_word(adapter->pdev, pcie_offset, &msix_count);
2763 msix_count &= IXGBE_PCIE_MSIX_TBL_SZ_MASK;
2764
2765 /* MSI-X count is zero-based in HW */
2766 msix_count++;
2767
2768 if (msix_count > max_msix_count)
2769 msix_count = max_msix_count;
2770
2771 return msix_count;
2772}
2773
2774/**
2775 * ixgbe_clear_vmdq_generic - Disassociate a VMDq pool index from a rx address
2776 * @hw: pointer to hardware struct
2777 * @rar: receive address register index to disassociate
2778 * @vmdq: VMDq pool index to remove from the rar
2779 **/
2780s32 ixgbe_clear_vmdq_generic(struct ixgbe_hw *hw, u32 rar, u32 vmdq)
2781{
2782 u32 mpsar_lo, mpsar_hi;
2783 u32 rar_entries = hw->mac.num_rar_entries;
2784
2785 /* Make sure we are using a valid rar index range */
2786 if (rar >= rar_entries) {
2787 hw_dbg(hw, "RAR index %d is out of range.\n", rar);
2788 return IXGBE_ERR_INVALID_ARGUMENT;
2789 }
2790
2791 mpsar_lo = IXGBE_READ_REG(hw, IXGBE_MPSAR_LO(rar));
2792 mpsar_hi = IXGBE_READ_REG(hw, IXGBE_MPSAR_HI(rar));
2793
2794 if (!mpsar_lo && !mpsar_hi)
2795 goto done;
2796
2797 if (vmdq == IXGBE_CLEAR_VMDQ_ALL) {
2798 if (mpsar_lo) {
2799 IXGBE_WRITE_REG(hw, IXGBE_MPSAR_LO(rar), 0);
2800 mpsar_lo = 0;
2801 }
2802 if (mpsar_hi) {
2803 IXGBE_WRITE_REG(hw, IXGBE_MPSAR_HI(rar), 0);
2804 mpsar_hi = 0;
2805 }
2806 } else if (vmdq < 32) {
2807 mpsar_lo &= ~(1 << vmdq);
2808 IXGBE_WRITE_REG(hw, IXGBE_MPSAR_LO(rar), mpsar_lo);
2809 } else {
2810 mpsar_hi &= ~(1 << (vmdq - 32));
2811 IXGBE_WRITE_REG(hw, IXGBE_MPSAR_HI(rar), mpsar_hi);
2812 }
2813
2814 /* was that the last pool using this rar? */
2815 if (mpsar_lo == 0 && mpsar_hi == 0 && rar != 0)
2816 hw->mac.ops.clear_rar(hw, rar);
2817done:
2818 return 0;
2819}
2820
2821/**
2822 * ixgbe_set_vmdq_generic - Associate a VMDq pool index with a rx address
2823 * @hw: pointer to hardware struct
2824 * @rar: receive address register index to associate with a VMDq index
2825 * @vmdq: VMDq pool index
2826 **/
2827s32 ixgbe_set_vmdq_generic(struct ixgbe_hw *hw, u32 rar, u32 vmdq)
2828{
2829 u32 mpsar;
2830 u32 rar_entries = hw->mac.num_rar_entries;
2831
2832 /* Make sure we are using a valid rar index range */
2833 if (rar >= rar_entries) {
2834 hw_dbg(hw, "RAR index %d is out of range.\n", rar);
2835 return IXGBE_ERR_INVALID_ARGUMENT;
2836 }
2837
2838 if (vmdq < 32) {
2839 mpsar = IXGBE_READ_REG(hw, IXGBE_MPSAR_LO(rar));
2840 mpsar |= 1 << vmdq;
2841 IXGBE_WRITE_REG(hw, IXGBE_MPSAR_LO(rar), mpsar);
2842 } else {
2843 mpsar = IXGBE_READ_REG(hw, IXGBE_MPSAR_HI(rar));
2844 mpsar |= 1 << (vmdq - 32);
2845 IXGBE_WRITE_REG(hw, IXGBE_MPSAR_HI(rar), mpsar);
2846 }
2847 return 0;
2848}
2849
2850/**
2851 * ixgbe_init_uta_tables_generic - Initialize the Unicast Table Array
2852 * @hw: pointer to hardware structure
2853 **/
2854s32 ixgbe_init_uta_tables_generic(struct ixgbe_hw *hw)
2855{
2856 int i;
2857
2858 for (i = 0; i < 128; i++)
2859 IXGBE_WRITE_REG(hw, IXGBE_UTA(i), 0);
2860
2861 return 0;
2862}
2863
2864/**
2865 * ixgbe_find_vlvf_slot - find the vlanid or the first empty slot
2866 * @hw: pointer to hardware structure
2867 * @vlan: VLAN id to write to VLAN filter
2868 *
2869 * return the VLVF index where this VLAN id should be placed
2870 *
2871 **/
2872static s32 ixgbe_find_vlvf_slot(struct ixgbe_hw *hw, u32 vlan)
2873{
2874 u32 bits = 0;
2875 u32 first_empty_slot = 0;
2876 s32 regindex;
2877
2878 /* short cut the special case */
2879 if (vlan == 0)
2880 return 0;
2881
2882 /*
2883 * Search for the vlan id in the VLVF entries. Save off the first empty
2884 * slot found along the way
2885 */
2886 for (regindex = 1; regindex < IXGBE_VLVF_ENTRIES; regindex++) {
2887 bits = IXGBE_READ_REG(hw, IXGBE_VLVF(regindex));
2888 if (!bits && !(first_empty_slot))
2889 first_empty_slot = regindex;
2890 else if ((bits & 0x0FFF) == vlan)
2891 break;
2892 }
2893
2894 /*
2895 * If regindex is less than IXGBE_VLVF_ENTRIES, then we found the vlan
2896 * in the VLVF. Else use the first empty VLVF register for this
2897 * vlan id.
2898 */
2899 if (regindex >= IXGBE_VLVF_ENTRIES) {
2900 if (first_empty_slot)
2901 regindex = first_empty_slot;
2902 else {
2903 hw_dbg(hw, "No space in VLVF.\n");
2904 regindex = IXGBE_ERR_NO_SPACE;
2905 }
2906 }
2907
2908 return regindex;
2909}
2910
2911/**
2912 * ixgbe_set_vfta_generic - Set VLAN filter table
2913 * @hw: pointer to hardware structure
2914 * @vlan: VLAN id to write to VLAN filter
2915 * @vind: VMDq output index that maps queue to VLAN id in VFVFB
2916 * @vlan_on: boolean flag to turn on/off VLAN in VFVF
2917 *
2918 * Turn on/off specified VLAN in the VLAN filter table.
2919 **/
2920s32 ixgbe_set_vfta_generic(struct ixgbe_hw *hw, u32 vlan, u32 vind,
2921 bool vlan_on)
2922{
2923 s32 regindex;
2924 u32 bitindex;
2925 u32 vfta;
2926 u32 bits;
2927 u32 vt;
2928 u32 targetbit;
2929 bool vfta_changed = false;
2930
2931 if (vlan > 4095)
2932 return IXGBE_ERR_PARAM;
2933
2934 /*
2935 * this is a 2 part operation - first the VFTA, then the
2936 * VLVF and VLVFB if VT Mode is set
2937 * We don't write the VFTA until we know the VLVF part succeeded.
2938 */
2939
2940 /* Part 1
2941 * The VFTA is a bitstring made up of 128 32-bit registers
2942 * that enable the particular VLAN id, much like the MTA:
2943 * bits[11-5]: which register
2944 * bits[4-0]: which bit in the register
2945 */
2946 regindex = (vlan >> 5) & 0x7F;
2947 bitindex = vlan & 0x1F;
2948 targetbit = (1 << bitindex);
2949 vfta = IXGBE_READ_REG(hw, IXGBE_VFTA(regindex));
2950
2951 if (vlan_on) {
2952 if (!(vfta & targetbit)) {
2953 vfta |= targetbit;
2954 vfta_changed = true;
2955 }
2956 } else {
2957 if ((vfta & targetbit)) {
2958 vfta &= ~targetbit;
2959 vfta_changed = true;
2960 }
2961 }
2962
2963 /* Part 2
2964 * If VT Mode is set
2965 * Either vlan_on
2966 * make sure the vlan is in VLVF
2967 * set the vind bit in the matching VLVFB
2968 * Or !vlan_on
2969 * clear the pool bit and possibly the vind
2970 */
2971 vt = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
2972 if (vt & IXGBE_VT_CTL_VT_ENABLE) {
2973 s32 vlvf_index;
2974
2975 vlvf_index = ixgbe_find_vlvf_slot(hw, vlan);
2976 if (vlvf_index < 0)
2977 return vlvf_index;
2978
2979 if (vlan_on) {
2980 /* set the pool bit */
2981 if (vind < 32) {
2982 bits = IXGBE_READ_REG(hw,
2983 IXGBE_VLVFB(vlvf_index*2));
2984 bits |= (1 << vind);
2985 IXGBE_WRITE_REG(hw,
2986 IXGBE_VLVFB(vlvf_index*2),
2987 bits);
2988 } else {
2989 bits = IXGBE_READ_REG(hw,
2990 IXGBE_VLVFB((vlvf_index*2)+1));
2991 bits |= (1 << (vind-32));
2992 IXGBE_WRITE_REG(hw,
2993 IXGBE_VLVFB((vlvf_index*2)+1),
2994 bits);
2995 }
2996 } else {
2997 /* clear the pool bit */
2998 if (vind < 32) {
2999 bits = IXGBE_READ_REG(hw,
3000 IXGBE_VLVFB(vlvf_index*2));
3001 bits &= ~(1 << vind);
3002 IXGBE_WRITE_REG(hw,
3003 IXGBE_VLVFB(vlvf_index*2),
3004 bits);
3005 bits |= IXGBE_READ_REG(hw,
3006 IXGBE_VLVFB((vlvf_index*2)+1));
3007 } else {
3008 bits = IXGBE_READ_REG(hw,
3009 IXGBE_VLVFB((vlvf_index*2)+1));
3010 bits &= ~(1 << (vind-32));
3011 IXGBE_WRITE_REG(hw,
3012 IXGBE_VLVFB((vlvf_index*2)+1),
3013 bits);
3014 bits |= IXGBE_READ_REG(hw,
3015 IXGBE_VLVFB(vlvf_index*2));
3016 }
3017 }
3018
3019 /*
3020 * If there are still bits set in the VLVFB registers
3021 * for the VLAN ID indicated we need to see if the
3022 * caller is requesting that we clear the VFTA entry bit.
3023 * If the caller has requested that we clear the VFTA
3024 * entry bit but there are still pools/VFs using this VLAN
3025 * ID entry then ignore the request. We're not worried
3026 * about the case where we're turning the VFTA VLAN ID
3027 * entry bit on, only when requested to turn it off as
3028 * there may be multiple pools and/or VFs using the
3029 * VLAN ID entry. In that case we cannot clear the
3030 * VFTA bit until all pools/VFs using that VLAN ID have also
3031 * been cleared. This will be indicated by "bits" being
3032 * zero.
3033 */
3034 if (bits) {
3035 IXGBE_WRITE_REG(hw, IXGBE_VLVF(vlvf_index),
3036 (IXGBE_VLVF_VIEN | vlan));
3037 if (!vlan_on) {
3038 /* someone wants to clear the vfta entry
3039 * but some pools/VFs are still using it.
3040 * Ignore it. */
3041 vfta_changed = false;
3042 }
3043 }
3044 else
3045 IXGBE_WRITE_REG(hw, IXGBE_VLVF(vlvf_index), 0);
3046 }
3047
3048 if (vfta_changed)
3049 IXGBE_WRITE_REG(hw, IXGBE_VFTA(regindex), vfta);
3050
3051 return 0;
3052}
3053
3054/**
3055 * ixgbe_clear_vfta_generic - Clear VLAN filter table
3056 * @hw: pointer to hardware structure
3057 *
3058 * Clears the VLAN filer table, and the VMDq index associated with the filter
3059 **/
3060s32 ixgbe_clear_vfta_generic(struct ixgbe_hw *hw)
3061{
3062 u32 offset;
3063
3064 for (offset = 0; offset < hw->mac.vft_size; offset++)
3065 IXGBE_WRITE_REG(hw, IXGBE_VFTA(offset), 0);
3066
3067 for (offset = 0; offset < IXGBE_VLVF_ENTRIES; offset++) {
3068 IXGBE_WRITE_REG(hw, IXGBE_VLVF(offset), 0);
3069 IXGBE_WRITE_REG(hw, IXGBE_VLVFB(offset*2), 0);
3070 IXGBE_WRITE_REG(hw, IXGBE_VLVFB((offset*2)+1), 0);
3071 }
3072
3073 return 0;
3074}
3075
3076/**
3077 * ixgbe_check_mac_link_generic - Determine link and speed status
3078 * @hw: pointer to hardware structure
3079 * @speed: pointer to link speed
3080 * @link_up: true when link is up
3081 * @link_up_wait_to_complete: bool used to wait for link up or not
3082 *
3083 * Reads the links register to determine if link is up and the current speed
3084 **/
3085s32 ixgbe_check_mac_link_generic(struct ixgbe_hw *hw, ixgbe_link_speed *speed,
3086 bool *link_up, bool link_up_wait_to_complete)
3087{
3088 u32 links_reg, links_orig;
3089 u32 i;
3090
3091 /* clear the old state */
3092 links_orig = IXGBE_READ_REG(hw, IXGBE_LINKS);
3093
3094 links_reg = IXGBE_READ_REG(hw, IXGBE_LINKS);
3095
3096 if (links_orig != links_reg) {
3097 hw_dbg(hw, "LINKS changed from %08X to %08X\n",
3098 links_orig, links_reg);
3099 }
3100
3101 if (link_up_wait_to_complete) {
3102 for (i = 0; i < IXGBE_LINK_UP_TIME; i++) {
3103 if (links_reg & IXGBE_LINKS_UP) {
3104 *link_up = true;
3105 break;
3106 } else {
3107 *link_up = false;
3108 }
3109 msleep(100);
3110 links_reg = IXGBE_READ_REG(hw, IXGBE_LINKS);
3111 }
3112 } else {
3113 if (links_reg & IXGBE_LINKS_UP)
3114 *link_up = true;
3115 else
3116 *link_up = false;
3117 }
3118
3119 if ((links_reg & IXGBE_LINKS_SPEED_82599) ==
3120 IXGBE_LINKS_SPEED_10G_82599)
3121 *speed = IXGBE_LINK_SPEED_10GB_FULL;
3122 else if ((links_reg & IXGBE_LINKS_SPEED_82599) ==
3123 IXGBE_LINKS_SPEED_1G_82599)
3124 *speed = IXGBE_LINK_SPEED_1GB_FULL;
3125 else if ((links_reg & IXGBE_LINKS_SPEED_82599) ==
3126 IXGBE_LINKS_SPEED_100_82599)
3127 *speed = IXGBE_LINK_SPEED_100_FULL;
3128 else
3129 *speed = IXGBE_LINK_SPEED_UNKNOWN;
3130
3131 return 0;
3132}
3133
3134/**
3135 * ixgbe_get_wwn_prefix_generic Get alternative WWNN/WWPN prefix from
3136 * the EEPROM
3137 * @hw: pointer to hardware structure
3138 * @wwnn_prefix: the alternative WWNN prefix
3139 * @wwpn_prefix: the alternative WWPN prefix
3140 *
3141 * This function will read the EEPROM from the alternative SAN MAC address
3142 * block to check the support for the alternative WWNN/WWPN prefix support.
3143 **/
3144s32 ixgbe_get_wwn_prefix_generic(struct ixgbe_hw *hw, u16 *wwnn_prefix,
3145 u16 *wwpn_prefix)
3146{
3147 u16 offset, caps;
3148 u16 alt_san_mac_blk_offset;
3149
3150 /* clear output first */
3151 *wwnn_prefix = 0xFFFF;
3152 *wwpn_prefix = 0xFFFF;
3153
3154 /* check if alternative SAN MAC is supported */
3155 hw->eeprom.ops.read(hw, IXGBE_ALT_SAN_MAC_ADDR_BLK_PTR,
3156 &alt_san_mac_blk_offset);
3157
3158 if ((alt_san_mac_blk_offset == 0) ||
3159 (alt_san_mac_blk_offset == 0xFFFF))
3160 goto wwn_prefix_out;
3161
3162 /* check capability in alternative san mac address block */
3163 offset = alt_san_mac_blk_offset + IXGBE_ALT_SAN_MAC_ADDR_CAPS_OFFSET;
3164 hw->eeprom.ops.read(hw, offset, &caps);
3165 if (!(caps & IXGBE_ALT_SAN_MAC_ADDR_CAPS_ALTWWN))
3166 goto wwn_prefix_out;
3167
3168 /* get the corresponding prefix for WWNN/WWPN */
3169 offset = alt_san_mac_blk_offset + IXGBE_ALT_SAN_MAC_ADDR_WWNN_OFFSET;
3170 hw->eeprom.ops.read(hw, offset, wwnn_prefix);
3171
3172 offset = alt_san_mac_blk_offset + IXGBE_ALT_SAN_MAC_ADDR_WWPN_OFFSET;
3173 hw->eeprom.ops.read(hw, offset, wwpn_prefix);
3174
3175wwn_prefix_out:
3176 return 0;
3177}
3178
3179/**
3180 * ixgbe_set_mac_anti_spoofing - Enable/Disable MAC anti-spoofing
3181 * @hw: pointer to hardware structure
3182 * @enable: enable or disable switch for anti-spoofing
3183 * @pf: Physical Function pool - do not enable anti-spoofing for the PF
3184 *
3185 **/
3186void ixgbe_set_mac_anti_spoofing(struct ixgbe_hw *hw, bool enable, int pf)
3187{
3188 int j;
3189 int pf_target_reg = pf >> 3;
3190 int pf_target_shift = pf % 8;
3191 u32 pfvfspoof = 0;
3192
3193 if (hw->mac.type == ixgbe_mac_82598EB)
3194 return;
3195
3196 if (enable)
3197 pfvfspoof = IXGBE_SPOOF_MACAS_MASK;
3198
3199 /*
3200 * PFVFSPOOF register array is size 8 with 8 bits assigned to
3201 * MAC anti-spoof enables in each register array element.
3202 */
3203 for (j = 0; j < IXGBE_PFVFSPOOF_REG_COUNT; j++)
3204 IXGBE_WRITE_REG(hw, IXGBE_PFVFSPOOF(j), pfvfspoof);
3205
3206 /* If not enabling anti-spoofing then done */
3207 if (!enable)
3208 return;
3209
3210 /*
3211 * The PF should be allowed to spoof so that it can support
3212 * emulation mode NICs. Reset the bit assigned to the PF
3213 */
3214 pfvfspoof = IXGBE_READ_REG(hw, IXGBE_PFVFSPOOF(pf_target_reg));
3215 pfvfspoof ^= (1 << pf_target_shift);
3216 IXGBE_WRITE_REG(hw, IXGBE_PFVFSPOOF(pf_target_reg), pfvfspoof);
3217}
3218
3219/**
3220 * ixgbe_set_vlan_anti_spoofing - Enable/Disable VLAN anti-spoofing
3221 * @hw: pointer to hardware structure
3222 * @enable: enable or disable switch for VLAN anti-spoofing
3223 * @pf: Virtual Function pool - VF Pool to set for VLAN anti-spoofing
3224 *
3225 **/
3226void ixgbe_set_vlan_anti_spoofing(struct ixgbe_hw *hw, bool enable, int vf)
3227{
3228 int vf_target_reg = vf >> 3;
3229 int vf_target_shift = vf % 8 + IXGBE_SPOOF_VLANAS_SHIFT;
3230 u32 pfvfspoof;
3231
3232 if (hw->mac.type == ixgbe_mac_82598EB)
3233 return;
3234
3235 pfvfspoof = IXGBE_READ_REG(hw, IXGBE_PFVFSPOOF(vf_target_reg));
3236 if (enable)
3237 pfvfspoof |= (1 << vf_target_shift);
3238 else
3239 pfvfspoof &= ~(1 << vf_target_shift);
3240 IXGBE_WRITE_REG(hw, IXGBE_PFVFSPOOF(vf_target_reg), pfvfspoof);
3241}
3242
3243/**
3244 * ixgbe_get_device_caps_generic - Get additional device capabilities
3245 * @hw: pointer to hardware structure
3246 * @device_caps: the EEPROM word with the extra device capabilities
3247 *
3248 * This function will read the EEPROM location for the device capabilities,
3249 * and return the word through device_caps.
3250 **/
3251s32 ixgbe_get_device_caps_generic(struct ixgbe_hw *hw, u16 *device_caps)
3252{
3253 hw->eeprom.ops.read(hw, IXGBE_DEVICE_CAPS, device_caps);
3254
3255 return 0;
3256}
3257
3258/**
3259 * ixgbe_set_rxpba_generic - Initialize RX packet buffer
3260 * @hw: pointer to hardware structure
3261 * @num_pb: number of packet buffers to allocate
3262 * @headroom: reserve n KB of headroom
3263 * @strategy: packet buffer allocation strategy
3264 **/
3265void ixgbe_set_rxpba_generic(struct ixgbe_hw *hw,
3266 int num_pb,
3267 u32 headroom,
3268 int strategy)
3269{
3270 u32 pbsize = hw->mac.rx_pb_size;
3271 int i = 0;
3272 u32 rxpktsize, txpktsize, txpbthresh;
3273
3274 /* Reserve headroom */
3275 pbsize -= headroom;
3276
3277 if (!num_pb)
3278 num_pb = 1;
3279
3280 /* Divide remaining packet buffer space amongst the number
3281 * of packet buffers requested using supplied strategy.
3282 */
3283 switch (strategy) {
3284 case (PBA_STRATEGY_WEIGHTED):
3285 /* pba_80_48 strategy weight first half of packet buffer with
3286 * 5/8 of the packet buffer space.
3287 */
3288 rxpktsize = ((pbsize * 5 * 2) / (num_pb * 8));
3289 pbsize -= rxpktsize * (num_pb / 2);
3290 rxpktsize <<= IXGBE_RXPBSIZE_SHIFT;
3291 for (; i < (num_pb / 2); i++)
3292 IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), rxpktsize);
3293 /* Fall through to configure remaining packet buffers */
3294 case (PBA_STRATEGY_EQUAL):
3295 /* Divide the remaining Rx packet buffer evenly among the TCs */
3296 rxpktsize = (pbsize / (num_pb - i)) << IXGBE_RXPBSIZE_SHIFT;
3297 for (; i < num_pb; i++)
3298 IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), rxpktsize);
3299 break;
3300 default:
3301 break;
3302 }
3303
3304 /*
3305 * Setup Tx packet buffer and threshold equally for all TCs
3306 * TXPBTHRESH register is set in K so divide by 1024 and subtract
3307 * 10 since the largest packet we support is just over 9K.
3308 */
3309 txpktsize = IXGBE_TXPBSIZE_MAX / num_pb;
3310 txpbthresh = (txpktsize / 1024) - IXGBE_TXPKT_SIZE_MAX;
3311 for (i = 0; i < num_pb; i++) {
3312 IXGBE_WRITE_REG(hw, IXGBE_TXPBSIZE(i), txpktsize);
3313 IXGBE_WRITE_REG(hw, IXGBE_TXPBTHRESH(i), txpbthresh);
3314 }
3315
3316 /* Clear unused TCs, if any, to zero buffer size*/
3317 for (; i < IXGBE_MAX_PB; i++) {
3318 IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), 0);
3319 IXGBE_WRITE_REG(hw, IXGBE_TXPBSIZE(i), 0);
3320 IXGBE_WRITE_REG(hw, IXGBE_TXPBTHRESH(i), 0);
3321 }
3322}
3323
3324/**
3325 * ixgbe_calculate_checksum - Calculate checksum for buffer
3326 * @buffer: pointer to EEPROM
3327 * @length: size of EEPROM to calculate a checksum for
3328 * Calculates the checksum for some buffer on a specified length. The
3329 * checksum calculated is returned.
3330 **/
3331static u8 ixgbe_calculate_checksum(u8 *buffer, u32 length)
3332{
3333 u32 i;
3334 u8 sum = 0;
3335
3336 if (!buffer)
3337 return 0;
3338
3339 for (i = 0; i < length; i++)
3340 sum += buffer[i];
3341
3342 return (u8) (0 - sum);
3343}
3344
3345/**
3346 * ixgbe_host_interface_command - Issue command to manageability block
3347 * @hw: pointer to the HW structure
3348 * @buffer: contains the command to write and where the return status will
3349 * be placed
3350 * @length: length of buffer, must be multiple of 4 bytes
3351 *
3352 * Communicates with the manageability block. On success return 0
3353 * else return IXGBE_ERR_HOST_INTERFACE_COMMAND.
3354 **/
3355static s32 ixgbe_host_interface_command(struct ixgbe_hw *hw, u32 *buffer,
3356 u32 length)
3357{
3358 u32 hicr, i, bi;
3359 u32 hdr_size = sizeof(struct ixgbe_hic_hdr);
3360 u8 buf_len, dword_len;
3361
3362 s32 ret_val = 0;
3363
3364 if (length == 0 || length & 0x3 ||
3365 length > IXGBE_HI_MAX_BLOCK_BYTE_LENGTH) {
3366 hw_dbg(hw, "Buffer length failure.\n");
3367 ret_val = IXGBE_ERR_HOST_INTERFACE_COMMAND;
3368 goto out;
3369 }
3370
3371 /* Check that the host interface is enabled. */
3372 hicr = IXGBE_READ_REG(hw, IXGBE_HICR);
3373 if ((hicr & IXGBE_HICR_EN) == 0) {
3374 hw_dbg(hw, "IXGBE_HOST_EN bit disabled.\n");
3375 ret_val = IXGBE_ERR_HOST_INTERFACE_COMMAND;
3376 goto out;
3377 }
3378
3379 /* Calculate length in DWORDs */
3380 dword_len = length >> 2;
3381
3382 /*
3383 * The device driver writes the relevant command block
3384 * into the ram area.
3385 */
3386 for (i = 0; i < dword_len; i++)
3387 IXGBE_WRITE_REG_ARRAY(hw, IXGBE_FLEX_MNG,
3388 i, cpu_to_le32(buffer[i]));
3389
3390 /* Setting this bit tells the ARC that a new command is pending. */
3391 IXGBE_WRITE_REG(hw, IXGBE_HICR, hicr | IXGBE_HICR_C);
3392
3393 for (i = 0; i < IXGBE_HI_COMMAND_TIMEOUT; i++) {
3394 hicr = IXGBE_READ_REG(hw, IXGBE_HICR);
3395 if (!(hicr & IXGBE_HICR_C))
3396 break;
3397 usleep_range(1000, 2000);
3398 }
3399
3400 /* Check command successful completion. */
3401 if (i == IXGBE_HI_COMMAND_TIMEOUT ||
3402 (!(IXGBE_READ_REG(hw, IXGBE_HICR) & IXGBE_HICR_SV))) {
3403 hw_dbg(hw, "Command has failed with no status valid.\n");
3404 ret_val = IXGBE_ERR_HOST_INTERFACE_COMMAND;
3405 goto out;
3406 }
3407
3408 /* Calculate length in DWORDs */
3409 dword_len = hdr_size >> 2;
3410
3411 /* first pull in the header so we know the buffer length */
3412 for (bi = 0; bi < dword_len; bi++) {
3413 buffer[bi] = IXGBE_READ_REG_ARRAY(hw, IXGBE_FLEX_MNG, bi);
3414 le32_to_cpus(&buffer[bi]);
3415 }
3416
3417 /* If there is any thing in data position pull it in */
3418 buf_len = ((struct ixgbe_hic_hdr *)buffer)->buf_len;
3419 if (buf_len == 0)
3420 goto out;
3421
3422 if (length < (buf_len + hdr_size)) {
3423 hw_dbg(hw, "Buffer not large enough for reply message.\n");
3424 ret_val = IXGBE_ERR_HOST_INTERFACE_COMMAND;
3425 goto out;
3426 }
3427
3428 /* Calculate length in DWORDs, add 3 for odd lengths */
3429 dword_len = (buf_len + 3) >> 2;
3430
3431 /* Pull in the rest of the buffer (bi is where we left off)*/
3432 for (; bi <= dword_len; bi++) {
3433 buffer[bi] = IXGBE_READ_REG_ARRAY(hw, IXGBE_FLEX_MNG, bi);
3434 le32_to_cpus(&buffer[bi]);
3435 }
3436
3437out:
3438 return ret_val;
3439}
3440
3441/**
3442 * ixgbe_set_fw_drv_ver_generic - Sends driver version to firmware
3443 * @hw: pointer to the HW structure
3444 * @maj: driver version major number
3445 * @min: driver version minor number
3446 * @build: driver version build number
3447 * @sub: driver version sub build number
3448 *
3449 * Sends driver version number to firmware through the manageability
3450 * block. On success return 0
3451 * else returns IXGBE_ERR_SWFW_SYNC when encountering an error acquiring
3452 * semaphore or IXGBE_ERR_HOST_INTERFACE_COMMAND when command fails.
3453 **/
3454s32 ixgbe_set_fw_drv_ver_generic(struct ixgbe_hw *hw, u8 maj, u8 min,
3455 u8 build, u8 sub)
3456{
3457 struct ixgbe_hic_drv_info fw_cmd;
3458 int i;
3459 s32 ret_val = 0;
3460
3461 if (hw->mac.ops.acquire_swfw_sync(hw, IXGBE_GSSR_SW_MNG_SM) != 0) {
3462 ret_val = IXGBE_ERR_SWFW_SYNC;
3463 goto out;
3464 }
3465
3466 fw_cmd.hdr.cmd = FW_CEM_CMD_DRIVER_INFO;
3467 fw_cmd.hdr.buf_len = FW_CEM_CMD_DRIVER_INFO_LEN;
3468 fw_cmd.hdr.cmd_or_resp.cmd_resv = FW_CEM_CMD_RESERVED;
3469 fw_cmd.port_num = (u8)hw->bus.func;
3470 fw_cmd.ver_maj = maj;
3471 fw_cmd.ver_min = min;
3472 fw_cmd.ver_build = build;
3473 fw_cmd.ver_sub = sub;
3474 fw_cmd.hdr.checksum = 0;
3475 fw_cmd.hdr.checksum = ixgbe_calculate_checksum((u8 *)&fw_cmd,
3476 (FW_CEM_HDR_LEN + fw_cmd.hdr.buf_len));
3477 fw_cmd.pad = 0;
3478 fw_cmd.pad2 = 0;
3479
3480 for (i = 0; i <= FW_CEM_MAX_RETRIES; i++) {
3481 ret_val = ixgbe_host_interface_command(hw, (u32 *)&fw_cmd,
3482 sizeof(fw_cmd));
3483 if (ret_val != 0)
3484 continue;
3485
3486 if (fw_cmd.hdr.cmd_or_resp.ret_status ==
3487 FW_CEM_RESP_STATUS_SUCCESS)
3488 ret_val = 0;
3489 else
3490 ret_val = IXGBE_ERR_HOST_INTERFACE_COMMAND;
3491
3492 break;
3493 }
3494
3495 hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_SW_MNG_SM);
3496out:
3497 return ret_val;
3498}
3499
3500/**
3501 * ixgbe_clear_tx_pending - Clear pending TX work from the PCIe fifo
3502 * @hw: pointer to the hardware structure
3503 *
3504 * The 82599 and x540 MACs can experience issues if TX work is still pending
3505 * when a reset occurs. This function prevents this by flushing the PCIe
3506 * buffers on the system.
3507 **/
3508void ixgbe_clear_tx_pending(struct ixgbe_hw *hw)
3509{
3510 u32 gcr_ext, hlreg0;
3511
3512 /*
3513 * If double reset is not requested then all transactions should
3514 * already be clear and as such there is no work to do
3515 */
3516 if (!(hw->mac.flags & IXGBE_FLAGS_DOUBLE_RESET_REQUIRED))
3517 return;
3518
3519 /*
3520 * Set loopback enable to prevent any transmits from being sent
3521 * should the link come up. This assumes that the RXCTRL.RXEN bit
3522 * has already been cleared.
3523 */
3524 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
3525 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0 | IXGBE_HLREG0_LPBK);
3526
3527 /* initiate cleaning flow for buffers in the PCIe transaction layer */
3528 gcr_ext = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
3529 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT,
3530 gcr_ext | IXGBE_GCR_EXT_BUFFERS_CLEAR);
3531
3532 /* Flush all writes and allow 20usec for all transactions to clear */
3533 IXGBE_WRITE_FLUSH(hw);
3534 udelay(20);
3535
3536 /* restore previous register values */
3537 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);
3538 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
3539}
3540
3541static const u8 ixgbe_emc_temp_data[4] = {
3542 IXGBE_EMC_INTERNAL_DATA,
3543 IXGBE_EMC_DIODE1_DATA,
3544 IXGBE_EMC_DIODE2_DATA,
3545 IXGBE_EMC_DIODE3_DATA
3546};
3547static const u8 ixgbe_emc_therm_limit[4] = {
3548 IXGBE_EMC_INTERNAL_THERM_LIMIT,
3549 IXGBE_EMC_DIODE1_THERM_LIMIT,
3550 IXGBE_EMC_DIODE2_THERM_LIMIT,
3551 IXGBE_EMC_DIODE3_THERM_LIMIT
3552};
3553
3554/**
3555 * ixgbe_get_ets_data - Extracts the ETS bit data
3556 * @hw: pointer to hardware structure
3557 * @ets_cfg: extected ETS data
3558 * @ets_offset: offset of ETS data
3559 *
3560 * Returns error code.
3561 **/
3562static s32 ixgbe_get_ets_data(struct ixgbe_hw *hw, u16 *ets_cfg,
3563 u16 *ets_offset)
3564{
3565 s32 status = 0;
3566
3567 status = hw->eeprom.ops.read(hw, IXGBE_ETS_CFG, ets_offset);
3568 if (status)
3569 goto out;
3570
3571 if ((*ets_offset == 0x0000) || (*ets_offset == 0xFFFF)) {
3572 status = IXGBE_NOT_IMPLEMENTED;
3573 goto out;
3574 }
3575
3576 status = hw->eeprom.ops.read(hw, *ets_offset, ets_cfg);
3577 if (status)
3578 goto out;
3579
3580 if ((*ets_cfg & IXGBE_ETS_TYPE_MASK) != IXGBE_ETS_TYPE_EMC_SHIFTED) {
3581 status = IXGBE_NOT_IMPLEMENTED;
3582 goto out;
3583 }
3584
3585out:
3586 return status;
3587}
3588
3589/**
3590 * ixgbe_get_thermal_sensor_data - Gathers thermal sensor data
3591 * @hw: pointer to hardware structure
3592 *
3593 * Returns the thermal sensor data structure
3594 **/
3595s32 ixgbe_get_thermal_sensor_data_generic(struct ixgbe_hw *hw)
3596{
3597 s32 status = 0;
3598 u16 ets_offset;
3599 u16 ets_cfg;
3600 u16 ets_sensor;
3601 u8 num_sensors;
3602 u8 i;
3603 struct ixgbe_thermal_sensor_data *data = &hw->mac.thermal_sensor_data;
3604
3605 /* Only support thermal sensors attached to physical port 0 */
3606 if ((IXGBE_READ_REG(hw, IXGBE_STATUS) & IXGBE_STATUS_LAN_ID_1)) {
3607 status = IXGBE_NOT_IMPLEMENTED;
3608 goto out;
3609 }
3610
3611 status = ixgbe_get_ets_data(hw, &ets_cfg, &ets_offset);
3612 if (status)
3613 goto out;
3614
3615 num_sensors = (ets_cfg & IXGBE_ETS_NUM_SENSORS_MASK);
3616 if (num_sensors > IXGBE_MAX_SENSORS)
3617 num_sensors = IXGBE_MAX_SENSORS;
3618
3619 for (i = 0; i < num_sensors; i++) {
3620 u8 sensor_index;
3621 u8 sensor_location;
3622
3623 status = hw->eeprom.ops.read(hw, (ets_offset + 1 + i),
3624 &ets_sensor);
3625 if (status)
3626 goto out;
3627
3628 sensor_index = ((ets_sensor & IXGBE_ETS_DATA_INDEX_MASK) >>
3629 IXGBE_ETS_DATA_INDEX_SHIFT);
3630 sensor_location = ((ets_sensor & IXGBE_ETS_DATA_LOC_MASK) >>
3631 IXGBE_ETS_DATA_LOC_SHIFT);
3632
3633 if (sensor_location != 0) {
3634 status = hw->phy.ops.read_i2c_byte(hw,
3635 ixgbe_emc_temp_data[sensor_index],
3636 IXGBE_I2C_THERMAL_SENSOR_ADDR,
3637 &data->sensor[i].temp);
3638 if (status)
3639 goto out;
3640 }
3641 }
3642out:
3643 return status;
3644}
3645
3646/**
3647 * ixgbe_init_thermal_sensor_thresh_generic - Inits thermal sensor thresholds
3648 * @hw: pointer to hardware structure
3649 *
3650 * Inits the thermal sensor thresholds according to the NVM map
3651 * and save off the threshold and location values into mac.thermal_sensor_data
3652 **/
3653s32 ixgbe_init_thermal_sensor_thresh_generic(struct ixgbe_hw *hw)
3654{
3655 s32 status = 0;
3656 u16 ets_offset;
3657 u16 ets_cfg;
3658 u16 ets_sensor;
3659 u8 low_thresh_delta;
3660 u8 num_sensors;
3661 u8 therm_limit;
3662 u8 i;
3663 struct ixgbe_thermal_sensor_data *data = &hw->mac.thermal_sensor_data;
3664
3665 memset(data, 0, sizeof(struct ixgbe_thermal_sensor_data));
3666
3667 /* Only support thermal sensors attached to physical port 0 */
3668 if ((IXGBE_READ_REG(hw, IXGBE_STATUS) & IXGBE_STATUS_LAN_ID_1)) {
3669 status = IXGBE_NOT_IMPLEMENTED;
3670 goto out;
3671 }
3672
3673 status = ixgbe_get_ets_data(hw, &ets_cfg, &ets_offset);
3674 if (status)
3675 goto out;
3676
3677 low_thresh_delta = ((ets_cfg & IXGBE_ETS_LTHRES_DELTA_MASK) >>
3678 IXGBE_ETS_LTHRES_DELTA_SHIFT);
3679 num_sensors = (ets_cfg & IXGBE_ETS_NUM_SENSORS_MASK);
3680 if (num_sensors > IXGBE_MAX_SENSORS)
3681 num_sensors = IXGBE_MAX_SENSORS;
3682
3683 for (i = 0; i < num_sensors; i++) {
3684 u8 sensor_index;
3685 u8 sensor_location;
3686
3687 hw->eeprom.ops.read(hw, (ets_offset + 1 + i), &ets_sensor);
3688 sensor_index = ((ets_sensor & IXGBE_ETS_DATA_INDEX_MASK) >>
3689 IXGBE_ETS_DATA_INDEX_SHIFT);
3690 sensor_location = ((ets_sensor & IXGBE_ETS_DATA_LOC_MASK) >>
3691 IXGBE_ETS_DATA_LOC_SHIFT);
3692 therm_limit = ets_sensor & IXGBE_ETS_DATA_HTHRESH_MASK;
3693
3694 hw->phy.ops.write_i2c_byte(hw,
3695 ixgbe_emc_therm_limit[sensor_index],
3696 IXGBE_I2C_THERMAL_SENSOR_ADDR, therm_limit);
3697
3698 if (sensor_location == 0)
3699 continue;
3700
3701 data->sensor[i].location = sensor_location;
3702 data->sensor[i].caution_thresh = therm_limit;
3703 data->sensor[i].max_op_thresh = therm_limit - low_thresh_delta;
3704 }
3705out:
3706 return status;
3707}
3708