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1// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 1999 - 2018 Intel Corporation. */
3
4#include "vf.h"
5#include "ixgbevf.h"
6
7/* On Hyper-V, to reset, we need to read from this offset
8 * from the PCI config space. This is the mechanism used on
9 * Hyper-V to support PF/VF communication.
10 */
11#define IXGBE_HV_RESET_OFFSET 0x201
12
13static inline s32 ixgbevf_write_msg_read_ack(struct ixgbe_hw *hw, u32 *msg,
14 u32 *retmsg, u16 size)
15{
16 s32 retval = ixgbevf_write_mbx(hw, msg, size);
17
18 if (retval)
19 return retval;
20
21 return ixgbevf_poll_mbx(hw, retmsg, size);
22}
23
24/**
25 * ixgbevf_start_hw_vf - Prepare hardware for Tx/Rx
26 * @hw: pointer to hardware structure
27 *
28 * Starts the hardware by filling the bus info structure and media type, clears
29 * all on chip counters, initializes receive address registers, multicast
30 * table, VLAN filter table, calls routine to set up link and flow control
31 * settings, and leaves transmit and receive units disabled and uninitialized
32 **/
33static s32 ixgbevf_start_hw_vf(struct ixgbe_hw *hw)
34{
35 /* Clear adapter stopped flag */
36 hw->adapter_stopped = false;
37
38 return 0;
39}
40
41/**
42 * ixgbevf_init_hw_vf - virtual function hardware initialization
43 * @hw: pointer to hardware structure
44 *
45 * Initialize the hardware by resetting the hardware and then starting
46 * the hardware
47 **/
48static s32 ixgbevf_init_hw_vf(struct ixgbe_hw *hw)
49{
50 s32 status = hw->mac.ops.start_hw(hw);
51
52 hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
53
54 return status;
55}
56
57/**
58 * ixgbevf_reset_hw_vf - Performs hardware reset
59 * @hw: pointer to hardware structure
60 *
61 * Resets the hardware by resetting the transmit and receive units, masks and
62 * clears all interrupts.
63 **/
64static s32 ixgbevf_reset_hw_vf(struct ixgbe_hw *hw)
65{
66 struct ixgbe_mbx_info *mbx = &hw->mbx;
67 u32 timeout = IXGBE_VF_INIT_TIMEOUT;
68 u32 msgbuf[IXGBE_VF_PERMADDR_MSG_LEN];
69 u8 *addr = (u8 *)(&msgbuf[1]);
70 s32 ret_val;
71
72 /* Call adapter stop to disable tx/rx and clear interrupts */
73 hw->mac.ops.stop_adapter(hw);
74
75 /* reset the api version */
76 hw->api_version = ixgbe_mbox_api_10;
77 hw->mbx.ops.init_params(hw);
78 memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops_legacy,
79 sizeof(struct ixgbe_mbx_operations));
80
81 IXGBE_WRITE_REG(hw, IXGBE_VFCTRL, IXGBE_CTRL_RST);
82 IXGBE_WRITE_FLUSH(hw);
83
84 /* we cannot reset while the RSTI / RSTD bits are asserted */
85 while (!mbx->ops.check_for_rst(hw) && timeout) {
86 timeout--;
87 udelay(5);
88 }
89
90 if (!timeout)
91 return IXGBE_ERR_RESET_FAILED;
92
93 /* mailbox timeout can now become active */
94 mbx->timeout = IXGBE_VF_MBX_INIT_TIMEOUT;
95
96 msgbuf[0] = IXGBE_VF_RESET;
97 ixgbevf_write_mbx(hw, msgbuf, 1);
98
99 mdelay(10);
100
101 /* set our "perm_addr" based on info provided by PF
102 * also set up the mc_filter_type which is piggy backed
103 * on the mac address in word 3
104 */
105 ret_val = ixgbevf_poll_mbx(hw, msgbuf, IXGBE_VF_PERMADDR_MSG_LEN);
106 if (ret_val)
107 return ret_val;
108
109 /* New versions of the PF may NACK the reset return message
110 * to indicate that no MAC address has yet been assigned for
111 * the VF.
112 */
113 if (msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_SUCCESS) &&
114 msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_FAILURE))
115 return IXGBE_ERR_INVALID_MAC_ADDR;
116
117 if (msgbuf[0] == (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_SUCCESS))
118 ether_addr_copy(hw->mac.perm_addr, addr);
119
120 hw->mac.mc_filter_type = msgbuf[IXGBE_VF_MC_TYPE_WORD];
121
122 return 0;
123}
124
125/**
126 * ixgbevf_hv_reset_hw_vf - reset via Hyper-V
127 * @hw: pointer to private hardware struct
128 *
129 * Hyper-V variant; the VF/PF communication is through the PCI
130 * config space.
131 */
132static s32 ixgbevf_hv_reset_hw_vf(struct ixgbe_hw *hw)
133{
134#if IS_ENABLED(CONFIG_PCI_MMCONFIG)
135 struct ixgbevf_adapter *adapter = hw->back;
136 int i;
137
138 for (i = 0; i < 6; i++)
139 pci_read_config_byte(adapter->pdev,
140 (i + IXGBE_HV_RESET_OFFSET),
141 &hw->mac.perm_addr[i]);
142 return 0;
143#else
144 pr_err("PCI_MMCONFIG needs to be enabled for Hyper-V\n");
145 return -EOPNOTSUPP;
146#endif
147}
148
149/**
150 * ixgbevf_stop_hw_vf - Generic stop Tx/Rx units
151 * @hw: pointer to hardware structure
152 *
153 * Sets the adapter_stopped flag within ixgbe_hw struct. Clears interrupts,
154 * disables transmit and receive units. The adapter_stopped flag is used by
155 * the shared code and drivers to determine if the adapter is in a stopped
156 * state and should not touch the hardware.
157 **/
158static s32 ixgbevf_stop_hw_vf(struct ixgbe_hw *hw)
159{
160 u32 number_of_queues;
161 u32 reg_val;
162 u16 i;
163
164 /* Set the adapter_stopped flag so other driver functions stop touching
165 * the hardware
166 */
167 hw->adapter_stopped = true;
168
169 /* Disable the receive unit by stopped each queue */
170 number_of_queues = hw->mac.max_rx_queues;
171 for (i = 0; i < number_of_queues; i++) {
172 reg_val = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(i));
173 if (reg_val & IXGBE_RXDCTL_ENABLE) {
174 reg_val &= ~IXGBE_RXDCTL_ENABLE;
175 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(i), reg_val);
176 }
177 }
178
179 IXGBE_WRITE_FLUSH(hw);
180
181 /* Clear interrupt mask to stop from interrupts being generated */
182 IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, IXGBE_VF_IRQ_CLEAR_MASK);
183
184 /* Clear any pending interrupts */
185 IXGBE_READ_REG(hw, IXGBE_VTEICR);
186
187 /* Disable the transmit unit. Each queue must be disabled. */
188 number_of_queues = hw->mac.max_tx_queues;
189 for (i = 0; i < number_of_queues; i++) {
190 reg_val = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(i));
191 if (reg_val & IXGBE_TXDCTL_ENABLE) {
192 reg_val &= ~IXGBE_TXDCTL_ENABLE;
193 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(i), reg_val);
194 }
195 }
196
197 return 0;
198}
199
200/**
201 * ixgbevf_mta_vector - Determines bit-vector in multicast table to set
202 * @hw: pointer to hardware structure
203 * @mc_addr: the multicast address
204 *
205 * Extracts the 12 bits, from a multicast address, to determine which
206 * bit-vector to set in the multicast table. The hardware uses 12 bits, from
207 * incoming Rx multicast addresses, to determine the bit-vector to check in
208 * the MTA. Which of the 4 combination, of 12-bits, the hardware uses is set
209 * by the MO field of the MCSTCTRL. The MO field is set during initialization
210 * to mc_filter_type.
211 **/
212static s32 ixgbevf_mta_vector(struct ixgbe_hw *hw, u8 *mc_addr)
213{
214 u32 vector = 0;
215
216 switch (hw->mac.mc_filter_type) {
217 case 0: /* use bits [47:36] of the address */
218 vector = ((mc_addr[4] >> 4) | (((u16)mc_addr[5]) << 4));
219 break;
220 case 1: /* use bits [46:35] of the address */
221 vector = ((mc_addr[4] >> 3) | (((u16)mc_addr[5]) << 5));
222 break;
223 case 2: /* use bits [45:34] of the address */
224 vector = ((mc_addr[4] >> 2) | (((u16)mc_addr[5]) << 6));
225 break;
226 case 3: /* use bits [43:32] of the address */
227 vector = ((mc_addr[4]) | (((u16)mc_addr[5]) << 8));
228 break;
229 default: /* Invalid mc_filter_type */
230 break;
231 }
232
233 /* vector can only be 12-bits or boundary will be exceeded */
234 vector &= 0xFFF;
235 return vector;
236}
237
238/**
239 * ixgbevf_get_mac_addr_vf - Read device MAC address
240 * @hw: pointer to the HW structure
241 * @mac_addr: pointer to storage for retrieved MAC address
242 **/
243static s32 ixgbevf_get_mac_addr_vf(struct ixgbe_hw *hw, u8 *mac_addr)
244{
245 ether_addr_copy(mac_addr, hw->mac.perm_addr);
246
247 return 0;
248}
249
250static s32 ixgbevf_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr)
251{
252 u32 msgbuf[3], msgbuf_chk;
253 u8 *msg_addr = (u8 *)(&msgbuf[1]);
254 s32 ret_val;
255
256 memset(msgbuf, 0, sizeof(msgbuf));
257 /* If index is one then this is the start of a new list and needs
258 * indication to the PF so it can do it's own list management.
259 * If it is zero then that tells the PF to just clear all of
260 * this VF's macvlans and there is no new list.
261 */
262 msgbuf[0] |= index << IXGBE_VT_MSGINFO_SHIFT;
263 msgbuf[0] |= IXGBE_VF_SET_MACVLAN;
264 msgbuf_chk = msgbuf[0];
265
266 if (addr)
267 ether_addr_copy(msg_addr, addr);
268
269 ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
270 ARRAY_SIZE(msgbuf));
271 if (!ret_val) {
272 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
273
274 if (msgbuf[0] == (msgbuf_chk | IXGBE_VT_MSGTYPE_FAILURE))
275 return -ENOMEM;
276 }
277
278 return ret_val;
279}
280
281static s32 ixgbevf_hv_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr)
282{
283 return -EOPNOTSUPP;
284}
285
286/**
287 * ixgbevf_get_reta_locked - get the RSS redirection table (RETA) contents.
288 * @hw: pointer to hardware structure
289 * @reta: buffer to fill with RETA contents.
290 * @num_rx_queues: Number of Rx queues configured for this port
291 *
292 * The "reta" buffer should be big enough to contain 32 registers.
293 *
294 * Returns: 0 on success.
295 * if API doesn't support this operation - (-EOPNOTSUPP).
296 */
297int ixgbevf_get_reta_locked(struct ixgbe_hw *hw, u32 *reta, int num_rx_queues)
298{
299 int err, i, j;
300 u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
301 u32 *hw_reta = &msgbuf[1];
302 u32 mask = 0;
303
304 /* We have to use a mailbox for 82599 and x540 devices only.
305 * For these devices RETA has 128 entries.
306 * Also these VFs support up to 4 RSS queues. Therefore PF will compress
307 * 16 RETA entries in each DWORD giving 2 bits to each entry.
308 */
309 int dwords = IXGBEVF_82599_RETA_SIZE / 16;
310
311 /* We support the RSS querying for 82599 and x540 devices only.
312 * Thus return an error if API doesn't support RETA querying or querying
313 * is not supported for this device type.
314 */
315 switch (hw->api_version) {
316 case ixgbe_mbox_api_15:
317 case ixgbe_mbox_api_14:
318 case ixgbe_mbox_api_13:
319 case ixgbe_mbox_api_12:
320 if (hw->mac.type < ixgbe_mac_X550_vf)
321 break;
322 fallthrough;
323 default:
324 return -EOPNOTSUPP;
325 }
326
327 msgbuf[0] = IXGBE_VF_GET_RETA;
328
329 err = ixgbevf_write_mbx(hw, msgbuf, 1);
330
331 if (err)
332 return err;
333
334 err = ixgbevf_poll_mbx(hw, msgbuf, dwords + 1);
335
336 if (err)
337 return err;
338
339 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
340
341 /* If the operation has been refused by a PF return -EPERM */
342 if (msgbuf[0] == (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_FAILURE))
343 return -EPERM;
344
345 /* If we didn't get an ACK there must have been
346 * some sort of mailbox error so we should treat it
347 * as such.
348 */
349 if (msgbuf[0] != (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_SUCCESS))
350 return IXGBE_ERR_MBX;
351
352 /* ixgbevf doesn't support more than 2 queues at the moment */
353 if (num_rx_queues > 1)
354 mask = 0x1;
355
356 for (i = 0; i < dwords; i++)
357 for (j = 0; j < 16; j++)
358 reta[i * 16 + j] = (hw_reta[i] >> (2 * j)) & mask;
359
360 return 0;
361}
362
363/**
364 * ixgbevf_get_rss_key_locked - get the RSS Random Key
365 * @hw: pointer to the HW structure
366 * @rss_key: buffer to fill with RSS Hash Key contents.
367 *
368 * The "rss_key" buffer should be big enough to contain 10 registers.
369 *
370 * Returns: 0 on success.
371 * if API doesn't support this operation - (-EOPNOTSUPP).
372 */
373int ixgbevf_get_rss_key_locked(struct ixgbe_hw *hw, u8 *rss_key)
374{
375 int err;
376 u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
377
378 /* We currently support the RSS Random Key retrieval for 82599 and x540
379 * devices only.
380 *
381 * Thus return an error if API doesn't support RSS Random Key retrieval
382 * or if the operation is not supported for this device type.
383 */
384 switch (hw->api_version) {
385 case ixgbe_mbox_api_15:
386 case ixgbe_mbox_api_14:
387 case ixgbe_mbox_api_13:
388 case ixgbe_mbox_api_12:
389 if (hw->mac.type < ixgbe_mac_X550_vf)
390 break;
391 fallthrough;
392 default:
393 return -EOPNOTSUPP;
394 }
395
396 msgbuf[0] = IXGBE_VF_GET_RSS_KEY;
397 err = ixgbevf_write_mbx(hw, msgbuf, 1);
398
399 if (err)
400 return err;
401
402 err = ixgbevf_poll_mbx(hw, msgbuf, 11);
403
404 if (err)
405 return err;
406
407 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
408
409 /* If the operation has been refused by a PF return -EPERM */
410 if (msgbuf[0] == (IXGBE_VF_GET_RSS_KEY | IXGBE_VT_MSGTYPE_FAILURE))
411 return -EPERM;
412
413 /* If we didn't get an ACK there must have been
414 * some sort of mailbox error so we should treat it
415 * as such.
416 */
417 if (msgbuf[0] != (IXGBE_VF_GET_RSS_KEY | IXGBE_VT_MSGTYPE_SUCCESS))
418 return IXGBE_ERR_MBX;
419
420 memcpy(rss_key, msgbuf + 1, IXGBEVF_RSS_HASH_KEY_SIZE);
421
422 return 0;
423}
424
425/**
426 * ixgbevf_set_rar_vf - set device MAC address
427 * @hw: pointer to hardware structure
428 * @index: Receive address register to write
429 * @addr: Address to put into receive address register
430 * @vmdq: Unused in this implementation
431 **/
432static s32 ixgbevf_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr,
433 u32 vmdq)
434{
435 u32 msgbuf[3];
436 u8 *msg_addr = (u8 *)(&msgbuf[1]);
437 s32 ret_val;
438
439 memset(msgbuf, 0, sizeof(msgbuf));
440 msgbuf[0] = IXGBE_VF_SET_MAC_ADDR;
441 ether_addr_copy(msg_addr, addr);
442
443 ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
444 ARRAY_SIZE(msgbuf));
445 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
446
447 /* if nacked the address was rejected, use "perm_addr" */
448 if (!ret_val &&
449 (msgbuf[0] == (IXGBE_VF_SET_MAC_ADDR | IXGBE_VT_MSGTYPE_FAILURE))) {
450 ixgbevf_get_mac_addr_vf(hw, hw->mac.addr);
451 return IXGBE_ERR_MBX;
452 }
453
454 return ret_val;
455}
456
457/**
458 * ixgbevf_hv_set_rar_vf - set device MAC address Hyper-V variant
459 * @hw: pointer to hardware structure
460 * @index: Receive address register to write
461 * @addr: Address to put into receive address register
462 * @vmdq: Unused in this implementation
463 *
464 * We don't really allow setting the device MAC address. However,
465 * if the address being set is the permanent MAC address we will
466 * permit that.
467 **/
468static s32 ixgbevf_hv_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr,
469 u32 vmdq)
470{
471 if (ether_addr_equal(addr, hw->mac.perm_addr))
472 return 0;
473
474 return -EOPNOTSUPP;
475}
476
477/**
478 * ixgbevf_update_mc_addr_list_vf - Update Multicast addresses
479 * @hw: pointer to the HW structure
480 * @netdev: pointer to net device structure
481 *
482 * Updates the Multicast Table Array.
483 **/
484static s32 ixgbevf_update_mc_addr_list_vf(struct ixgbe_hw *hw,
485 struct net_device *netdev)
486{
487 struct netdev_hw_addr *ha;
488 u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
489 u16 *vector_list = (u16 *)&msgbuf[1];
490 u32 cnt, i;
491
492 /* Each entry in the list uses 1 16 bit word. We have 30
493 * 16 bit words available in our HW msg buffer (minus 1 for the
494 * msg type). That's 30 hash values if we pack 'em right. If
495 * there are more than 30 MC addresses to add then punt the
496 * extras for now and then add code to handle more than 30 later.
497 * It would be unusual for a server to request that many multi-cast
498 * addresses except for in large enterprise network environments.
499 */
500
501 cnt = netdev_mc_count(netdev);
502 if (cnt > 30)
503 cnt = 30;
504 msgbuf[0] = IXGBE_VF_SET_MULTICAST;
505 msgbuf[0] |= cnt << IXGBE_VT_MSGINFO_SHIFT;
506
507 i = 0;
508 netdev_for_each_mc_addr(ha, netdev) {
509 if (i == cnt)
510 break;
511 if (is_link_local_ether_addr(ha->addr))
512 continue;
513
514 vector_list[i++] = ixgbevf_mta_vector(hw, ha->addr);
515 }
516
517 return ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
518 IXGBE_VFMAILBOX_SIZE);
519}
520
521/**
522 * ixgbevf_hv_update_mc_addr_list_vf - stub
523 * @hw: unused
524 * @netdev: unused
525 *
526 * Hyper-V variant - just a stub.
527 */
528static s32 ixgbevf_hv_update_mc_addr_list_vf(struct ixgbe_hw *hw,
529 struct net_device *netdev)
530{
531 return -EOPNOTSUPP;
532}
533
534/**
535 * ixgbevf_update_xcast_mode - Update Multicast mode
536 * @hw: pointer to the HW structure
537 * @xcast_mode: new multicast mode
538 *
539 * Updates the Multicast Mode of VF.
540 **/
541static s32 ixgbevf_update_xcast_mode(struct ixgbe_hw *hw, int xcast_mode)
542{
543 u32 msgbuf[2];
544 s32 err;
545
546 switch (hw->api_version) {
547 case ixgbe_mbox_api_12:
548 /* promisc introduced in 1.3 version */
549 if (xcast_mode == IXGBEVF_XCAST_MODE_PROMISC)
550 return -EOPNOTSUPP;
551 fallthrough;
552 case ixgbe_mbox_api_13:
553 case ixgbe_mbox_api_14:
554 case ixgbe_mbox_api_15:
555 break;
556 default:
557 return -EOPNOTSUPP;
558 }
559
560 msgbuf[0] = IXGBE_VF_UPDATE_XCAST_MODE;
561 msgbuf[1] = xcast_mode;
562
563 err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
564 ARRAY_SIZE(msgbuf));
565 if (err)
566 return err;
567
568 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
569 if (msgbuf[0] == (IXGBE_VF_UPDATE_XCAST_MODE | IXGBE_VT_MSGTYPE_FAILURE))
570 return -EPERM;
571
572 return 0;
573}
574
575/**
576 * ixgbevf_hv_update_xcast_mode - stub
577 * @hw: unused
578 * @xcast_mode: unused
579 *
580 * Hyper-V variant - just a stub.
581 */
582static s32 ixgbevf_hv_update_xcast_mode(struct ixgbe_hw *hw, int xcast_mode)
583{
584 return -EOPNOTSUPP;
585}
586
587/**
588 * ixgbevf_get_link_state_vf - Get VF link state from PF
589 * @hw: pointer to the HW structure
590 * @link_state: link state storage
591 *
592 * Returns state of the operation error or success.
593 */
594static s32 ixgbevf_get_link_state_vf(struct ixgbe_hw *hw, bool *link_state)
595{
596 u32 msgbuf[2];
597 s32 ret_val;
598 s32 err;
599
600 msgbuf[0] = IXGBE_VF_GET_LINK_STATE;
601 msgbuf[1] = 0x0;
602
603 err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 2);
604
605 if (err || (msgbuf[0] & IXGBE_VT_MSGTYPE_FAILURE)) {
606 ret_val = IXGBE_ERR_MBX;
607 } else {
608 ret_val = 0;
609 *link_state = msgbuf[1];
610 }
611
612 return ret_val;
613}
614
615/**
616 * ixgbevf_hv_get_link_state_vf - * Hyper-V variant - just a stub.
617 * @hw: unused
618 * @link_state: unused
619 *
620 * Hyper-V variant; there is no mailbox communication.
621 */
622static s32 ixgbevf_hv_get_link_state_vf(struct ixgbe_hw *hw, bool *link_state)
623{
624 return -EOPNOTSUPP;
625}
626
627/**
628 * ixgbevf_set_vfta_vf - Set/Unset VLAN filter table address
629 * @hw: pointer to the HW structure
630 * @vlan: 12 bit VLAN ID
631 * @vind: unused by VF drivers
632 * @vlan_on: if true then set bit, else clear bit
633 **/
634static s32 ixgbevf_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind,
635 bool vlan_on)
636{
637 u32 msgbuf[2];
638 s32 err;
639
640 msgbuf[0] = IXGBE_VF_SET_VLAN;
641 msgbuf[1] = vlan;
642 /* Setting the 8 bit field MSG INFO to TRUE indicates "add" */
643 msgbuf[0] |= vlan_on << IXGBE_VT_MSGINFO_SHIFT;
644
645 err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
646 ARRAY_SIZE(msgbuf));
647 if (err)
648 goto mbx_err;
649
650 /* remove extra bits from the message */
651 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
652 msgbuf[0] &= ~(0xFF << IXGBE_VT_MSGINFO_SHIFT);
653
654 if (msgbuf[0] != (IXGBE_VF_SET_VLAN | IXGBE_VT_MSGTYPE_SUCCESS))
655 err = IXGBE_ERR_INVALID_ARGUMENT;
656
657mbx_err:
658 return err;
659}
660
661/**
662 * ixgbevf_hv_set_vfta_vf - * Hyper-V variant - just a stub.
663 * @hw: unused
664 * @vlan: unused
665 * @vind: unused
666 * @vlan_on: unused
667 */
668static s32 ixgbevf_hv_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind,
669 bool vlan_on)
670{
671 return -EOPNOTSUPP;
672}
673
674/**
675 * ixgbevf_setup_mac_link_vf - Setup MAC link settings
676 * @hw: pointer to hardware structure
677 * @speed: Unused in this implementation
678 * @autoneg: Unused in this implementation
679 * @autoneg_wait_to_complete: Unused in this implementation
680 *
681 * Do nothing and return success. VF drivers are not allowed to change
682 * global settings. Maintained for driver compatibility.
683 **/
684static s32 ixgbevf_setup_mac_link_vf(struct ixgbe_hw *hw,
685 ixgbe_link_speed speed, bool autoneg,
686 bool autoneg_wait_to_complete)
687{
688 return 0;
689}
690
691/**
692 * ixgbevf_check_mac_link_vf - Get link/speed status
693 * @hw: pointer to hardware structure
694 * @speed: pointer to link speed
695 * @link_up: true is link is up, false otherwise
696 * @autoneg_wait_to_complete: unused
697 *
698 * Reads the links register to determine if link is up and the current speed
699 **/
700static s32 ixgbevf_check_mac_link_vf(struct ixgbe_hw *hw,
701 ixgbe_link_speed *speed,
702 bool *link_up,
703 bool autoneg_wait_to_complete)
704{
705 struct ixgbe_mbx_info *mbx = &hw->mbx;
706 struct ixgbe_mac_info *mac = &hw->mac;
707 s32 ret_val = 0;
708 u32 links_reg;
709 u32 in_msg = 0;
710
711 /* If we were hit with a reset drop the link */
712 if (!mbx->ops.check_for_rst(hw) || !mbx->timeout)
713 mac->get_link_status = true;
714
715 if (!mac->get_link_status)
716 goto out;
717
718 /* if link status is down no point in checking to see if pf is up */
719 links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
720 if (!(links_reg & IXGBE_LINKS_UP))
721 goto out;
722
723 /* for SFP+ modules and DA cables on 82599 it can take up to 500usecs
724 * before the link status is correct
725 */
726 if (mac->type == ixgbe_mac_82599_vf) {
727 int i;
728
729 for (i = 0; i < 5; i++) {
730 udelay(100);
731 links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
732
733 if (!(links_reg & IXGBE_LINKS_UP))
734 goto out;
735 }
736 }
737
738 switch (links_reg & IXGBE_LINKS_SPEED_82599) {
739 case IXGBE_LINKS_SPEED_10G_82599:
740 *speed = IXGBE_LINK_SPEED_10GB_FULL;
741 break;
742 case IXGBE_LINKS_SPEED_1G_82599:
743 *speed = IXGBE_LINK_SPEED_1GB_FULL;
744 break;
745 case IXGBE_LINKS_SPEED_100_82599:
746 *speed = IXGBE_LINK_SPEED_100_FULL;
747 break;
748 }
749
750 /* if the read failed it could just be a mailbox collision, best wait
751 * until we are called again and don't report an error
752 */
753 if (mbx->ops.read(hw, &in_msg, 1)) {
754 if (hw->api_version >= ixgbe_mbox_api_15)
755 mac->get_link_status = false;
756 goto out;
757 }
758
759 if (!(in_msg & IXGBE_VT_MSGTYPE_CTS)) {
760 /* msg is not CTS and is NACK we must have lost CTS status */
761 if (in_msg & IXGBE_VT_MSGTYPE_FAILURE)
762 ret_val = -1;
763 goto out;
764 }
765
766 /* the pf is talking, if we timed out in the past we reinit */
767 if (!mbx->timeout) {
768 ret_val = -1;
769 goto out;
770 }
771
772 /* if we passed all the tests above then the link is up and we no
773 * longer need to check for link
774 */
775 mac->get_link_status = false;
776
777out:
778 *link_up = !mac->get_link_status;
779 return ret_val;
780}
781
782/**
783 * ixgbevf_hv_check_mac_link_vf - check link
784 * @hw: pointer to private hardware struct
785 * @speed: pointer to link speed
786 * @link_up: true is link is up, false otherwise
787 * @autoneg_wait_to_complete: unused
788 *
789 * Hyper-V variant; there is no mailbox communication.
790 */
791static s32 ixgbevf_hv_check_mac_link_vf(struct ixgbe_hw *hw,
792 ixgbe_link_speed *speed,
793 bool *link_up,
794 bool autoneg_wait_to_complete)
795{
796 struct ixgbe_mbx_info *mbx = &hw->mbx;
797 struct ixgbe_mac_info *mac = &hw->mac;
798 u32 links_reg;
799
800 /* If we were hit with a reset drop the link */
801 if (!mbx->ops.check_for_rst(hw) || !mbx->timeout)
802 mac->get_link_status = true;
803
804 if (!mac->get_link_status)
805 goto out;
806
807 /* if link status is down no point in checking to see if pf is up */
808 links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
809 if (!(links_reg & IXGBE_LINKS_UP))
810 goto out;
811
812 /* for SFP+ modules and DA cables on 82599 it can take up to 500usecs
813 * before the link status is correct
814 */
815 if (mac->type == ixgbe_mac_82599_vf) {
816 int i;
817
818 for (i = 0; i < 5; i++) {
819 udelay(100);
820 links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
821
822 if (!(links_reg & IXGBE_LINKS_UP))
823 goto out;
824 }
825 }
826
827 switch (links_reg & IXGBE_LINKS_SPEED_82599) {
828 case IXGBE_LINKS_SPEED_10G_82599:
829 *speed = IXGBE_LINK_SPEED_10GB_FULL;
830 break;
831 case IXGBE_LINKS_SPEED_1G_82599:
832 *speed = IXGBE_LINK_SPEED_1GB_FULL;
833 break;
834 case IXGBE_LINKS_SPEED_100_82599:
835 *speed = IXGBE_LINK_SPEED_100_FULL;
836 break;
837 }
838
839 /* if we passed all the tests above then the link is up and we no
840 * longer need to check for link
841 */
842 mac->get_link_status = false;
843
844out:
845 *link_up = !mac->get_link_status;
846 return 0;
847}
848
849/**
850 * ixgbevf_set_rlpml_vf - Set the maximum receive packet length
851 * @hw: pointer to the HW structure
852 * @max_size: value to assign to max frame size
853 **/
854static s32 ixgbevf_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size)
855{
856 u32 msgbuf[2];
857 s32 ret_val;
858
859 msgbuf[0] = IXGBE_VF_SET_LPE;
860 msgbuf[1] = max_size;
861
862 ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
863 ARRAY_SIZE(msgbuf));
864 if (ret_val)
865 return ret_val;
866 if ((msgbuf[0] & IXGBE_VF_SET_LPE) &&
867 (msgbuf[0] & IXGBE_VT_MSGTYPE_FAILURE))
868 return IXGBE_ERR_MBX;
869
870 return 0;
871}
872
873/**
874 * ixgbevf_hv_set_rlpml_vf - Set the maximum receive packet length
875 * @hw: pointer to the HW structure
876 * @max_size: value to assign to max frame size
877 * Hyper-V variant.
878 **/
879static s32 ixgbevf_hv_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size)
880{
881 u32 reg;
882
883 /* If we are on Hyper-V, we implement this functionality
884 * differently.
885 */
886 reg = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(0));
887 /* CRC == 4 */
888 reg |= ((max_size + 4) | IXGBE_RXDCTL_RLPML_EN);
889 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(0), reg);
890
891 return 0;
892}
893
894/**
895 * ixgbevf_negotiate_api_version_vf - Negotiate supported API version
896 * @hw: pointer to the HW structure
897 * @api: integer containing requested API version
898 **/
899static int ixgbevf_negotiate_api_version_vf(struct ixgbe_hw *hw, int api)
900{
901 int err;
902 u32 msg[3];
903
904 /* Negotiate the mailbox API version */
905 msg[0] = IXGBE_VF_API_NEGOTIATE;
906 msg[1] = api;
907 msg[2] = 0;
908
909 err = ixgbevf_write_msg_read_ack(hw, msg, msg, ARRAY_SIZE(msg));
910 if (!err) {
911 msg[0] &= ~IXGBE_VT_MSGTYPE_CTS;
912
913 /* Store value and return 0 on success */
914 if (msg[0] == (IXGBE_VF_API_NEGOTIATE |
915 IXGBE_VT_MSGTYPE_SUCCESS)) {
916 hw->api_version = api;
917 return 0;
918 }
919
920 err = IXGBE_ERR_INVALID_ARGUMENT;
921 }
922
923 return err;
924}
925
926/**
927 * ixgbevf_hv_negotiate_api_version_vf - Negotiate supported API version
928 * @hw: pointer to the HW structure
929 * @api: integer containing requested API version
930 * Hyper-V version - only ixgbe_mbox_api_10 supported.
931 **/
932static int ixgbevf_hv_negotiate_api_version_vf(struct ixgbe_hw *hw, int api)
933{
934 /* Hyper-V only supports api version ixgbe_mbox_api_10 */
935 if (api != ixgbe_mbox_api_10)
936 return IXGBE_ERR_INVALID_ARGUMENT;
937
938 return 0;
939}
940
941int ixgbevf_get_queues(struct ixgbe_hw *hw, unsigned int *num_tcs,
942 unsigned int *default_tc)
943{
944 int err;
945 u32 msg[5];
946
947 /* do nothing if API doesn't support ixgbevf_get_queues */
948 switch (hw->api_version) {
949 case ixgbe_mbox_api_11:
950 case ixgbe_mbox_api_12:
951 case ixgbe_mbox_api_13:
952 case ixgbe_mbox_api_14:
953 case ixgbe_mbox_api_15:
954 break;
955 default:
956 return 0;
957 }
958
959 /* Fetch queue configuration from the PF */
960 msg[0] = IXGBE_VF_GET_QUEUE;
961 msg[1] = msg[2] = msg[3] = msg[4] = 0;
962
963 err = ixgbevf_write_msg_read_ack(hw, msg, msg, ARRAY_SIZE(msg));
964 if (!err) {
965 msg[0] &= ~IXGBE_VT_MSGTYPE_CTS;
966
967 /* if we didn't get an ACK there must have been
968 * some sort of mailbox error so we should treat it
969 * as such
970 */
971 if (msg[0] != (IXGBE_VF_GET_QUEUE | IXGBE_VT_MSGTYPE_SUCCESS))
972 return IXGBE_ERR_MBX;
973
974 /* record and validate values from message */
975 hw->mac.max_tx_queues = msg[IXGBE_VF_TX_QUEUES];
976 if (hw->mac.max_tx_queues == 0 ||
977 hw->mac.max_tx_queues > IXGBE_VF_MAX_TX_QUEUES)
978 hw->mac.max_tx_queues = IXGBE_VF_MAX_TX_QUEUES;
979
980 hw->mac.max_rx_queues = msg[IXGBE_VF_RX_QUEUES];
981 if (hw->mac.max_rx_queues == 0 ||
982 hw->mac.max_rx_queues > IXGBE_VF_MAX_RX_QUEUES)
983 hw->mac.max_rx_queues = IXGBE_VF_MAX_RX_QUEUES;
984
985 *num_tcs = msg[IXGBE_VF_TRANS_VLAN];
986 /* in case of unknown state assume we cannot tag frames */
987 if (*num_tcs > hw->mac.max_rx_queues)
988 *num_tcs = 1;
989
990 *default_tc = msg[IXGBE_VF_DEF_QUEUE];
991 /* default to queue 0 on out-of-bounds queue number */
992 if (*default_tc >= hw->mac.max_tx_queues)
993 *default_tc = 0;
994 }
995
996 return err;
997}
998
999static const struct ixgbe_mac_operations ixgbevf_mac_ops = {
1000 .init_hw = ixgbevf_init_hw_vf,
1001 .reset_hw = ixgbevf_reset_hw_vf,
1002 .start_hw = ixgbevf_start_hw_vf,
1003 .get_mac_addr = ixgbevf_get_mac_addr_vf,
1004 .stop_adapter = ixgbevf_stop_hw_vf,
1005 .setup_link = ixgbevf_setup_mac_link_vf,
1006 .check_link = ixgbevf_check_mac_link_vf,
1007 .negotiate_api_version = ixgbevf_negotiate_api_version_vf,
1008 .set_rar = ixgbevf_set_rar_vf,
1009 .update_mc_addr_list = ixgbevf_update_mc_addr_list_vf,
1010 .update_xcast_mode = ixgbevf_update_xcast_mode,
1011 .get_link_state = ixgbevf_get_link_state_vf,
1012 .set_uc_addr = ixgbevf_set_uc_addr_vf,
1013 .set_vfta = ixgbevf_set_vfta_vf,
1014 .set_rlpml = ixgbevf_set_rlpml_vf,
1015};
1016
1017static const struct ixgbe_mac_operations ixgbevf_hv_mac_ops = {
1018 .init_hw = ixgbevf_init_hw_vf,
1019 .reset_hw = ixgbevf_hv_reset_hw_vf,
1020 .start_hw = ixgbevf_start_hw_vf,
1021 .get_mac_addr = ixgbevf_get_mac_addr_vf,
1022 .stop_adapter = ixgbevf_stop_hw_vf,
1023 .setup_link = ixgbevf_setup_mac_link_vf,
1024 .check_link = ixgbevf_hv_check_mac_link_vf,
1025 .negotiate_api_version = ixgbevf_hv_negotiate_api_version_vf,
1026 .set_rar = ixgbevf_hv_set_rar_vf,
1027 .update_mc_addr_list = ixgbevf_hv_update_mc_addr_list_vf,
1028 .update_xcast_mode = ixgbevf_hv_update_xcast_mode,
1029 .get_link_state = ixgbevf_hv_get_link_state_vf,
1030 .set_uc_addr = ixgbevf_hv_set_uc_addr_vf,
1031 .set_vfta = ixgbevf_hv_set_vfta_vf,
1032 .set_rlpml = ixgbevf_hv_set_rlpml_vf,
1033};
1034
1035const struct ixgbevf_info ixgbevf_82599_vf_info = {
1036 .mac = ixgbe_mac_82599_vf,
1037 .mac_ops = &ixgbevf_mac_ops,
1038};
1039
1040const struct ixgbevf_info ixgbevf_82599_vf_hv_info = {
1041 .mac = ixgbe_mac_82599_vf,
1042 .mac_ops = &ixgbevf_hv_mac_ops,
1043};
1044
1045const struct ixgbevf_info ixgbevf_X540_vf_info = {
1046 .mac = ixgbe_mac_X540_vf,
1047 .mac_ops = &ixgbevf_mac_ops,
1048};
1049
1050const struct ixgbevf_info ixgbevf_X540_vf_hv_info = {
1051 .mac = ixgbe_mac_X540_vf,
1052 .mac_ops = &ixgbevf_hv_mac_ops,
1053};
1054
1055const struct ixgbevf_info ixgbevf_X550_vf_info = {
1056 .mac = ixgbe_mac_X550_vf,
1057 .mac_ops = &ixgbevf_mac_ops,
1058};
1059
1060const struct ixgbevf_info ixgbevf_X550_vf_hv_info = {
1061 .mac = ixgbe_mac_X550_vf,
1062 .mac_ops = &ixgbevf_hv_mac_ops,
1063};
1064
1065const struct ixgbevf_info ixgbevf_X550EM_x_vf_info = {
1066 .mac = ixgbe_mac_X550EM_x_vf,
1067 .mac_ops = &ixgbevf_mac_ops,
1068};
1069
1070const struct ixgbevf_info ixgbevf_X550EM_x_vf_hv_info = {
1071 .mac = ixgbe_mac_X550EM_x_vf,
1072 .mac_ops = &ixgbevf_hv_mac_ops,
1073};
1074
1075const struct ixgbevf_info ixgbevf_x550em_a_vf_info = {
1076 .mac = ixgbe_mac_x550em_a_vf,
1077 .mac_ops = &ixgbevf_mac_ops,
1078};