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1/*******************************************************************************
2
3 Intel 82599 Virtual Function driver
4 Copyright(c) 1999 - 2015 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, see <http://www.gnu.org/licenses/>.
17
18 The full GNU General Public License is included in this distribution in
19 the file called "COPYING".
20
21 Contact Information:
22 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
23 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24
25*******************************************************************************/
26
27#include "vf.h"
28#include "ixgbevf.h"
29
30/* On Hyper-V, to reset, we need to read from this offset
31 * from the PCI config space. This is the mechanism used on
32 * Hyper-V to support PF/VF communication.
33 */
34#define IXGBE_HV_RESET_OFFSET 0x201
35
36static inline s32 ixgbevf_write_msg_read_ack(struct ixgbe_hw *hw, u32 *msg,
37 u32 *retmsg, u16 size)
38{
39 struct ixgbe_mbx_info *mbx = &hw->mbx;
40 s32 retval = mbx->ops.write_posted(hw, msg, size);
41
42 if (retval)
43 return retval;
44
45 return mbx->ops.read_posted(hw, retmsg, size);
46}
47
48/**
49 * ixgbevf_start_hw_vf - Prepare hardware for Tx/Rx
50 * @hw: pointer to hardware structure
51 *
52 * Starts the hardware by filling the bus info structure and media type, clears
53 * all on chip counters, initializes receive address registers, multicast
54 * table, VLAN filter table, calls routine to set up link and flow control
55 * settings, and leaves transmit and receive units disabled and uninitialized
56 **/
57static s32 ixgbevf_start_hw_vf(struct ixgbe_hw *hw)
58{
59 /* Clear adapter stopped flag */
60 hw->adapter_stopped = false;
61
62 return 0;
63}
64
65/**
66 * ixgbevf_init_hw_vf - virtual function hardware initialization
67 * @hw: pointer to hardware structure
68 *
69 * Initialize the hardware by resetting the hardware and then starting
70 * the hardware
71 **/
72static s32 ixgbevf_init_hw_vf(struct ixgbe_hw *hw)
73{
74 s32 status = hw->mac.ops.start_hw(hw);
75
76 hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
77
78 return status;
79}
80
81/**
82 * ixgbevf_reset_hw_vf - Performs hardware reset
83 * @hw: pointer to hardware structure
84 *
85 * Resets the hardware by resetting the transmit and receive units, masks and
86 * clears all interrupts.
87 **/
88static s32 ixgbevf_reset_hw_vf(struct ixgbe_hw *hw)
89{
90 struct ixgbe_mbx_info *mbx = &hw->mbx;
91 u32 timeout = IXGBE_VF_INIT_TIMEOUT;
92 s32 ret_val = IXGBE_ERR_INVALID_MAC_ADDR;
93 u32 msgbuf[IXGBE_VF_PERMADDR_MSG_LEN];
94 u8 *addr = (u8 *)(&msgbuf[1]);
95
96 /* Call adapter stop to disable tx/rx and clear interrupts */
97 hw->mac.ops.stop_adapter(hw);
98
99 /* reset the api version */
100 hw->api_version = ixgbe_mbox_api_10;
101
102 IXGBE_WRITE_REG(hw, IXGBE_VFCTRL, IXGBE_CTRL_RST);
103 IXGBE_WRITE_FLUSH(hw);
104
105 /* we cannot reset while the RSTI / RSTD bits are asserted */
106 while (!mbx->ops.check_for_rst(hw) && timeout) {
107 timeout--;
108 udelay(5);
109 }
110
111 if (!timeout)
112 return IXGBE_ERR_RESET_FAILED;
113
114 /* mailbox timeout can now become active */
115 mbx->timeout = IXGBE_VF_MBX_INIT_TIMEOUT;
116
117 msgbuf[0] = IXGBE_VF_RESET;
118 mbx->ops.write_posted(hw, msgbuf, 1);
119
120 mdelay(10);
121
122 /* set our "perm_addr" based on info provided by PF
123 * also set up the mc_filter_type which is piggy backed
124 * on the mac address in word 3
125 */
126 ret_val = mbx->ops.read_posted(hw, msgbuf, IXGBE_VF_PERMADDR_MSG_LEN);
127 if (ret_val)
128 return ret_val;
129
130 /* New versions of the PF may NACK the reset return message
131 * to indicate that no MAC address has yet been assigned for
132 * the VF.
133 */
134 if (msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK) &&
135 msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_NACK))
136 return IXGBE_ERR_INVALID_MAC_ADDR;
137
138 if (msgbuf[0] == (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK))
139 ether_addr_copy(hw->mac.perm_addr, addr);
140
141 hw->mac.mc_filter_type = msgbuf[IXGBE_VF_MC_TYPE_WORD];
142
143 return 0;
144}
145
146/**
147 * Hyper-V variant; the VF/PF communication is through the PCI
148 * config space.
149 * @hw: pointer to private hardware struct
150 */
151static s32 ixgbevf_hv_reset_hw_vf(struct ixgbe_hw *hw)
152{
153#if IS_ENABLED(CONFIG_PCI_MMCONFIG)
154 struct ixgbevf_adapter *adapter = hw->back;
155 int i;
156
157 for (i = 0; i < 6; i++)
158 pci_read_config_byte(adapter->pdev,
159 (i + IXGBE_HV_RESET_OFFSET),
160 &hw->mac.perm_addr[i]);
161 return 0;
162#else
163 pr_err("PCI_MMCONFIG needs to be enabled for Hyper-V\n");
164 return -EOPNOTSUPP;
165#endif
166}
167
168/**
169 * ixgbevf_stop_hw_vf - Generic stop Tx/Rx units
170 * @hw: pointer to hardware structure
171 *
172 * Sets the adapter_stopped flag within ixgbe_hw struct. Clears interrupts,
173 * disables transmit and receive units. The adapter_stopped flag is used by
174 * the shared code and drivers to determine if the adapter is in a stopped
175 * state and should not touch the hardware.
176 **/
177static s32 ixgbevf_stop_hw_vf(struct ixgbe_hw *hw)
178{
179 u32 number_of_queues;
180 u32 reg_val;
181 u16 i;
182
183 /* Set the adapter_stopped flag so other driver functions stop touching
184 * the hardware
185 */
186 hw->adapter_stopped = true;
187
188 /* Disable the receive unit by stopped each queue */
189 number_of_queues = hw->mac.max_rx_queues;
190 for (i = 0; i < number_of_queues; i++) {
191 reg_val = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(i));
192 if (reg_val & IXGBE_RXDCTL_ENABLE) {
193 reg_val &= ~IXGBE_RXDCTL_ENABLE;
194 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(i), reg_val);
195 }
196 }
197
198 IXGBE_WRITE_FLUSH(hw);
199
200 /* Clear interrupt mask to stop from interrupts being generated */
201 IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, IXGBE_VF_IRQ_CLEAR_MASK);
202
203 /* Clear any pending interrupts */
204 IXGBE_READ_REG(hw, IXGBE_VTEICR);
205
206 /* Disable the transmit unit. Each queue must be disabled. */
207 number_of_queues = hw->mac.max_tx_queues;
208 for (i = 0; i < number_of_queues; i++) {
209 reg_val = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(i));
210 if (reg_val & IXGBE_TXDCTL_ENABLE) {
211 reg_val &= ~IXGBE_TXDCTL_ENABLE;
212 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(i), reg_val);
213 }
214 }
215
216 return 0;
217}
218
219/**
220 * ixgbevf_mta_vector - Determines bit-vector in multicast table to set
221 * @hw: pointer to hardware structure
222 * @mc_addr: the multicast address
223 *
224 * Extracts the 12 bits, from a multicast address, to determine which
225 * bit-vector to set in the multicast table. The hardware uses 12 bits, from
226 * incoming Rx multicast addresses, to determine the bit-vector to check in
227 * the MTA. Which of the 4 combination, of 12-bits, the hardware uses is set
228 * by the MO field of the MCSTCTRL. The MO field is set during initialization
229 * to mc_filter_type.
230 **/
231static s32 ixgbevf_mta_vector(struct ixgbe_hw *hw, u8 *mc_addr)
232{
233 u32 vector = 0;
234
235 switch (hw->mac.mc_filter_type) {
236 case 0: /* use bits [47:36] of the address */
237 vector = ((mc_addr[4] >> 4) | (((u16)mc_addr[5]) << 4));
238 break;
239 case 1: /* use bits [46:35] of the address */
240 vector = ((mc_addr[4] >> 3) | (((u16)mc_addr[5]) << 5));
241 break;
242 case 2: /* use bits [45:34] of the address */
243 vector = ((mc_addr[4] >> 2) | (((u16)mc_addr[5]) << 6));
244 break;
245 case 3: /* use bits [43:32] of the address */
246 vector = ((mc_addr[4]) | (((u16)mc_addr[5]) << 8));
247 break;
248 default: /* Invalid mc_filter_type */
249 break;
250 }
251
252 /* vector can only be 12-bits or boundary will be exceeded */
253 vector &= 0xFFF;
254 return vector;
255}
256
257/**
258 * ixgbevf_get_mac_addr_vf - Read device MAC address
259 * @hw: pointer to the HW structure
260 * @mac_addr: pointer to storage for retrieved MAC address
261 **/
262static s32 ixgbevf_get_mac_addr_vf(struct ixgbe_hw *hw, u8 *mac_addr)
263{
264 ether_addr_copy(mac_addr, hw->mac.perm_addr);
265
266 return 0;
267}
268
269static s32 ixgbevf_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr)
270{
271 u32 msgbuf[3], msgbuf_chk;
272 u8 *msg_addr = (u8 *)(&msgbuf[1]);
273 s32 ret_val;
274
275 memset(msgbuf, 0, sizeof(msgbuf));
276 /* If index is one then this is the start of a new list and needs
277 * indication to the PF so it can do it's own list management.
278 * If it is zero then that tells the PF to just clear all of
279 * this VF's macvlans and there is no new list.
280 */
281 msgbuf[0] |= index << IXGBE_VT_MSGINFO_SHIFT;
282 msgbuf[0] |= IXGBE_VF_SET_MACVLAN;
283 msgbuf_chk = msgbuf[0];
284
285 if (addr)
286 ether_addr_copy(msg_addr, addr);
287
288 ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
289 ARRAY_SIZE(msgbuf));
290 if (!ret_val) {
291 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
292
293 if (msgbuf[0] == (msgbuf_chk | IXGBE_VT_MSGTYPE_NACK))
294 return -ENOMEM;
295 }
296
297 return ret_val;
298}
299
300static s32 ixgbevf_hv_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr)
301{
302 return -EOPNOTSUPP;
303}
304
305/**
306 * ixgbevf_get_reta_locked - get the RSS redirection table (RETA) contents.
307 * @hw: pointer to hardware structure
308 * @reta: buffer to fill with RETA contents.
309 * @num_rx_queues: Number of Rx queues configured for this port
310 *
311 * The "reta" buffer should be big enough to contain 32 registers.
312 *
313 * Returns: 0 on success.
314 * if API doesn't support this operation - (-EOPNOTSUPP).
315 */
316int ixgbevf_get_reta_locked(struct ixgbe_hw *hw, u32 *reta, int num_rx_queues)
317{
318 int err, i, j;
319 u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
320 u32 *hw_reta = &msgbuf[1];
321 u32 mask = 0;
322
323 /* We have to use a mailbox for 82599 and x540 devices only.
324 * For these devices RETA has 128 entries.
325 * Also these VFs support up to 4 RSS queues. Therefore PF will compress
326 * 16 RETA entries in each DWORD giving 2 bits to each entry.
327 */
328 int dwords = IXGBEVF_82599_RETA_SIZE / 16;
329
330 /* We support the RSS querying for 82599 and x540 devices only.
331 * Thus return an error if API doesn't support RETA querying or querying
332 * is not supported for this device type.
333 */
334 switch (hw->api_version) {
335 case ixgbe_mbox_api_13:
336 case ixgbe_mbox_api_12:
337 if (hw->mac.type < ixgbe_mac_X550_vf)
338 break;
339 /* fall through */
340 default:
341 return -EOPNOTSUPP;
342 }
343
344 msgbuf[0] = IXGBE_VF_GET_RETA;
345
346 err = hw->mbx.ops.write_posted(hw, msgbuf, 1);
347
348 if (err)
349 return err;
350
351 err = hw->mbx.ops.read_posted(hw, msgbuf, dwords + 1);
352
353 if (err)
354 return err;
355
356 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
357
358 /* If the operation has been refused by a PF return -EPERM */
359 if (msgbuf[0] == (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_NACK))
360 return -EPERM;
361
362 /* If we didn't get an ACK there must have been
363 * some sort of mailbox error so we should treat it
364 * as such.
365 */
366 if (msgbuf[0] != (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_ACK))
367 return IXGBE_ERR_MBX;
368
369 /* ixgbevf doesn't support more than 2 queues at the moment */
370 if (num_rx_queues > 1)
371 mask = 0x1;
372
373 for (i = 0; i < dwords; i++)
374 for (j = 0; j < 16; j++)
375 reta[i * 16 + j] = (hw_reta[i] >> (2 * j)) & mask;
376
377 return 0;
378}
379
380/**
381 * ixgbevf_get_rss_key_locked - get the RSS Random Key
382 * @hw: pointer to the HW structure
383 * @rss_key: buffer to fill with RSS Hash Key contents.
384 *
385 * The "rss_key" buffer should be big enough to contain 10 registers.
386 *
387 * Returns: 0 on success.
388 * if API doesn't support this operation - (-EOPNOTSUPP).
389 */
390int ixgbevf_get_rss_key_locked(struct ixgbe_hw *hw, u8 *rss_key)
391{
392 int err;
393 u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
394
395 /* We currently support the RSS Random Key retrieval for 82599 and x540
396 * devices only.
397 *
398 * Thus return an error if API doesn't support RSS Random Key retrieval
399 * or if the operation is not supported for this device type.
400 */
401 switch (hw->api_version) {
402 case ixgbe_mbox_api_13:
403 case ixgbe_mbox_api_12:
404 if (hw->mac.type < ixgbe_mac_X550_vf)
405 break;
406 /* fall through */
407 default:
408 return -EOPNOTSUPP;
409 }
410
411 msgbuf[0] = IXGBE_VF_GET_RSS_KEY;
412 err = hw->mbx.ops.write_posted(hw, msgbuf, 1);
413
414 if (err)
415 return err;
416
417 err = hw->mbx.ops.read_posted(hw, msgbuf, 11);
418
419 if (err)
420 return err;
421
422 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
423
424 /* If the operation has been refused by a PF return -EPERM */
425 if (msgbuf[0] == (IXGBE_VF_GET_RSS_KEY | IXGBE_VT_MSGTYPE_NACK))
426 return -EPERM;
427
428 /* If we didn't get an ACK there must have been
429 * some sort of mailbox error so we should treat it
430 * as such.
431 */
432 if (msgbuf[0] != (IXGBE_VF_GET_RSS_KEY | IXGBE_VT_MSGTYPE_ACK))
433 return IXGBE_ERR_MBX;
434
435 memcpy(rss_key, msgbuf + 1, IXGBEVF_RSS_HASH_KEY_SIZE);
436
437 return 0;
438}
439
440/**
441 * ixgbevf_set_rar_vf - set device MAC address
442 * @hw: pointer to hardware structure
443 * @index: Receive address register to write
444 * @addr: Address to put into receive address register
445 * @vmdq: Unused in this implementation
446 **/
447static s32 ixgbevf_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr,
448 u32 vmdq)
449{
450 u32 msgbuf[3];
451 u8 *msg_addr = (u8 *)(&msgbuf[1]);
452 s32 ret_val;
453
454 memset(msgbuf, 0, sizeof(msgbuf));
455 msgbuf[0] = IXGBE_VF_SET_MAC_ADDR;
456 ether_addr_copy(msg_addr, addr);
457
458 ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
459 ARRAY_SIZE(msgbuf));
460 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
461
462 /* if nacked the address was rejected, use "perm_addr" */
463 if (!ret_val &&
464 (msgbuf[0] == (IXGBE_VF_SET_MAC_ADDR | IXGBE_VT_MSGTYPE_NACK))) {
465 ixgbevf_get_mac_addr_vf(hw, hw->mac.addr);
466 return IXGBE_ERR_MBX;
467 }
468
469 return ret_val;
470}
471
472/**
473 * ixgbevf_hv_set_rar_vf - set device MAC address Hyper-V variant
474 * @hw: pointer to hardware structure
475 * @index: Receive address register to write
476 * @addr: Address to put into receive address register
477 * @vmdq: Unused in this implementation
478 *
479 * We don't really allow setting the device MAC address. However,
480 * if the address being set is the permanent MAC address we will
481 * permit that.
482 **/
483static s32 ixgbevf_hv_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr,
484 u32 vmdq)
485{
486 if (ether_addr_equal(addr, hw->mac.perm_addr))
487 return 0;
488
489 return -EOPNOTSUPP;
490}
491
492/**
493 * ixgbevf_update_mc_addr_list_vf - Update Multicast addresses
494 * @hw: pointer to the HW structure
495 * @netdev: pointer to net device structure
496 *
497 * Updates the Multicast Table Array.
498 **/
499static s32 ixgbevf_update_mc_addr_list_vf(struct ixgbe_hw *hw,
500 struct net_device *netdev)
501{
502 struct netdev_hw_addr *ha;
503 u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
504 u16 *vector_list = (u16 *)&msgbuf[1];
505 u32 cnt, i;
506
507 /* Each entry in the list uses 1 16 bit word. We have 30
508 * 16 bit words available in our HW msg buffer (minus 1 for the
509 * msg type). That's 30 hash values if we pack 'em right. If
510 * there are more than 30 MC addresses to add then punt the
511 * extras for now and then add code to handle more than 30 later.
512 * It would be unusual for a server to request that many multi-cast
513 * addresses except for in large enterprise network environments.
514 */
515
516 cnt = netdev_mc_count(netdev);
517 if (cnt > 30)
518 cnt = 30;
519 msgbuf[0] = IXGBE_VF_SET_MULTICAST;
520 msgbuf[0] |= cnt << IXGBE_VT_MSGINFO_SHIFT;
521
522 i = 0;
523 netdev_for_each_mc_addr(ha, netdev) {
524 if (i == cnt)
525 break;
526 if (is_link_local_ether_addr(ha->addr))
527 continue;
528
529 vector_list[i++] = ixgbevf_mta_vector(hw, ha->addr);
530 }
531
532 ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, IXGBE_VFMAILBOX_SIZE);
533
534 return 0;
535}
536
537/**
538 * Hyper-V variant - just a stub.
539 * @hw: unused
540 * @netdev: unused
541 */
542static s32 ixgbevf_hv_update_mc_addr_list_vf(struct ixgbe_hw *hw,
543 struct net_device *netdev)
544{
545 return -EOPNOTSUPP;
546}
547
548/**
549 * ixgbevf_update_xcast_mode - Update Multicast mode
550 * @hw: pointer to the HW structure
551 * @xcast_mode: new multicast mode
552 *
553 * Updates the Multicast Mode of VF.
554 **/
555static s32 ixgbevf_update_xcast_mode(struct ixgbe_hw *hw, int xcast_mode)
556{
557 u32 msgbuf[2];
558 s32 err;
559
560 switch (hw->api_version) {
561 case ixgbe_mbox_api_12:
562 /* promisc introduced in 1.3 version */
563 if (xcast_mode == IXGBEVF_XCAST_MODE_PROMISC)
564 return -EOPNOTSUPP;
565 /* Fall threw */
566 case ixgbe_mbox_api_13:
567 break;
568 default:
569 return -EOPNOTSUPP;
570 }
571
572 msgbuf[0] = IXGBE_VF_UPDATE_XCAST_MODE;
573 msgbuf[1] = xcast_mode;
574
575 err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
576 ARRAY_SIZE(msgbuf));
577 if (err)
578 return err;
579
580 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
581 if (msgbuf[0] == (IXGBE_VF_UPDATE_XCAST_MODE | IXGBE_VT_MSGTYPE_NACK))
582 return -EPERM;
583
584 return 0;
585}
586
587/**
588 * Hyper-V variant - just a stub.
589 * @hw: unused
590 * @xcast_mode: unused
591 */
592static s32 ixgbevf_hv_update_xcast_mode(struct ixgbe_hw *hw, int xcast_mode)
593{
594 return -EOPNOTSUPP;
595}
596
597/**
598 * ixgbevf_set_vfta_vf - Set/Unset VLAN filter table address
599 * @hw: pointer to the HW structure
600 * @vlan: 12 bit VLAN ID
601 * @vind: unused by VF drivers
602 * @vlan_on: if true then set bit, else clear bit
603 **/
604static s32 ixgbevf_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind,
605 bool vlan_on)
606{
607 u32 msgbuf[2];
608 s32 err;
609
610 msgbuf[0] = IXGBE_VF_SET_VLAN;
611 msgbuf[1] = vlan;
612 /* Setting the 8 bit field MSG INFO to TRUE indicates "add" */
613 msgbuf[0] |= vlan_on << IXGBE_VT_MSGINFO_SHIFT;
614
615 err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
616 ARRAY_SIZE(msgbuf));
617 if (err)
618 goto mbx_err;
619
620 /* remove extra bits from the message */
621 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
622 msgbuf[0] &= ~(0xFF << IXGBE_VT_MSGINFO_SHIFT);
623
624 if (msgbuf[0] != (IXGBE_VF_SET_VLAN | IXGBE_VT_MSGTYPE_ACK))
625 err = IXGBE_ERR_INVALID_ARGUMENT;
626
627mbx_err:
628 return err;
629}
630
631/**
632 * Hyper-V variant - just a stub.
633 * @hw: unused
634 * @vlan: unused
635 * @vind: unused
636 * @vlan_on: unused
637 */
638static s32 ixgbevf_hv_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind,
639 bool vlan_on)
640{
641 return -EOPNOTSUPP;
642}
643
644/**
645 * ixgbevf_setup_mac_link_vf - Setup MAC link settings
646 * @hw: pointer to hardware structure
647 * @speed: Unused in this implementation
648 * @autoneg: Unused in this implementation
649 * @autoneg_wait_to_complete: Unused in this implementation
650 *
651 * Do nothing and return success. VF drivers are not allowed to change
652 * global settings. Maintained for driver compatibility.
653 **/
654static s32 ixgbevf_setup_mac_link_vf(struct ixgbe_hw *hw,
655 ixgbe_link_speed speed, bool autoneg,
656 bool autoneg_wait_to_complete)
657{
658 return 0;
659}
660
661/**
662 * ixgbevf_check_mac_link_vf - Get link/speed status
663 * @hw: pointer to hardware structure
664 * @speed: pointer to link speed
665 * @link_up: true is link is up, false otherwise
666 * @autoneg_wait_to_complete: unused
667 *
668 * Reads the links register to determine if link is up and the current speed
669 **/
670static s32 ixgbevf_check_mac_link_vf(struct ixgbe_hw *hw,
671 ixgbe_link_speed *speed,
672 bool *link_up,
673 bool autoneg_wait_to_complete)
674{
675 struct ixgbe_mbx_info *mbx = &hw->mbx;
676 struct ixgbe_mac_info *mac = &hw->mac;
677 s32 ret_val = 0;
678 u32 links_reg;
679 u32 in_msg = 0;
680
681 /* If we were hit with a reset drop the link */
682 if (!mbx->ops.check_for_rst(hw) || !mbx->timeout)
683 mac->get_link_status = true;
684
685 if (!mac->get_link_status)
686 goto out;
687
688 /* if link status is down no point in checking to see if pf is up */
689 links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
690 if (!(links_reg & IXGBE_LINKS_UP))
691 goto out;
692
693 /* for SFP+ modules and DA cables on 82599 it can take up to 500usecs
694 * before the link status is correct
695 */
696 if (mac->type == ixgbe_mac_82599_vf) {
697 int i;
698
699 for (i = 0; i < 5; i++) {
700 udelay(100);
701 links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
702
703 if (!(links_reg & IXGBE_LINKS_UP))
704 goto out;
705 }
706 }
707
708 switch (links_reg & IXGBE_LINKS_SPEED_82599) {
709 case IXGBE_LINKS_SPEED_10G_82599:
710 *speed = IXGBE_LINK_SPEED_10GB_FULL;
711 break;
712 case IXGBE_LINKS_SPEED_1G_82599:
713 *speed = IXGBE_LINK_SPEED_1GB_FULL;
714 break;
715 case IXGBE_LINKS_SPEED_100_82599:
716 *speed = IXGBE_LINK_SPEED_100_FULL;
717 break;
718 }
719
720 /* if the read failed it could just be a mailbox collision, best wait
721 * until we are called again and don't report an error
722 */
723 if (mbx->ops.read(hw, &in_msg, 1))
724 goto out;
725
726 if (!(in_msg & IXGBE_VT_MSGTYPE_CTS)) {
727 /* msg is not CTS and is NACK we must have lost CTS status */
728 if (in_msg & IXGBE_VT_MSGTYPE_NACK)
729 ret_val = -1;
730 goto out;
731 }
732
733 /* the pf is talking, if we timed out in the past we reinit */
734 if (!mbx->timeout) {
735 ret_val = -1;
736 goto out;
737 }
738
739 /* if we passed all the tests above then the link is up and we no
740 * longer need to check for link
741 */
742 mac->get_link_status = false;
743
744out:
745 *link_up = !mac->get_link_status;
746 return ret_val;
747}
748
749/**
750 * Hyper-V variant; there is no mailbox communication.
751 * @hw: pointer to private hardware struct
752 * @speed: pointer to link speed
753 * @link_up: true is link is up, false otherwise
754 * @autoneg_wait_to_complete: unused
755 */
756static s32 ixgbevf_hv_check_mac_link_vf(struct ixgbe_hw *hw,
757 ixgbe_link_speed *speed,
758 bool *link_up,
759 bool autoneg_wait_to_complete)
760{
761 struct ixgbe_mbx_info *mbx = &hw->mbx;
762 struct ixgbe_mac_info *mac = &hw->mac;
763 u32 links_reg;
764
765 /* If we were hit with a reset drop the link */
766 if (!mbx->ops.check_for_rst(hw) || !mbx->timeout)
767 mac->get_link_status = true;
768
769 if (!mac->get_link_status)
770 goto out;
771
772 /* if link status is down no point in checking to see if pf is up */
773 links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
774 if (!(links_reg & IXGBE_LINKS_UP))
775 goto out;
776
777 /* for SFP+ modules and DA cables on 82599 it can take up to 500usecs
778 * before the link status is correct
779 */
780 if (mac->type == ixgbe_mac_82599_vf) {
781 int i;
782
783 for (i = 0; i < 5; i++) {
784 udelay(100);
785 links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
786
787 if (!(links_reg & IXGBE_LINKS_UP))
788 goto out;
789 }
790 }
791
792 switch (links_reg & IXGBE_LINKS_SPEED_82599) {
793 case IXGBE_LINKS_SPEED_10G_82599:
794 *speed = IXGBE_LINK_SPEED_10GB_FULL;
795 break;
796 case IXGBE_LINKS_SPEED_1G_82599:
797 *speed = IXGBE_LINK_SPEED_1GB_FULL;
798 break;
799 case IXGBE_LINKS_SPEED_100_82599:
800 *speed = IXGBE_LINK_SPEED_100_FULL;
801 break;
802 }
803
804 /* if we passed all the tests above then the link is up and we no
805 * longer need to check for link
806 */
807 mac->get_link_status = false;
808
809out:
810 *link_up = !mac->get_link_status;
811 return 0;
812}
813
814/**
815 * ixgbevf_set_rlpml_vf - Set the maximum receive packet length
816 * @hw: pointer to the HW structure
817 * @max_size: value to assign to max frame size
818 **/
819static s32 ixgbevf_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size)
820{
821 u32 msgbuf[2];
822 s32 ret_val;
823
824 msgbuf[0] = IXGBE_VF_SET_LPE;
825 msgbuf[1] = max_size;
826
827 ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
828 ARRAY_SIZE(msgbuf));
829 if (ret_val)
830 return ret_val;
831 if ((msgbuf[0] & IXGBE_VF_SET_LPE) &&
832 (msgbuf[0] & IXGBE_VT_MSGTYPE_NACK))
833 return IXGBE_ERR_MBX;
834
835 return 0;
836}
837
838/**
839 * ixgbevf_hv_set_rlpml_vf - Set the maximum receive packet length
840 * @hw: pointer to the HW structure
841 * @max_size: value to assign to max frame size
842 * Hyper-V variant.
843 **/
844static s32 ixgbevf_hv_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size)
845{
846 u32 reg;
847
848 /* If we are on Hyper-V, we implement this functionality
849 * differently.
850 */
851 reg = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(0));
852 /* CRC == 4 */
853 reg |= ((max_size + 4) | IXGBE_RXDCTL_RLPML_EN);
854 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(0), reg);
855
856 return 0;
857}
858
859/**
860 * ixgbevf_negotiate_api_version_vf - Negotiate supported API version
861 * @hw: pointer to the HW structure
862 * @api: integer containing requested API version
863 **/
864static int ixgbevf_negotiate_api_version_vf(struct ixgbe_hw *hw, int api)
865{
866 int err;
867 u32 msg[3];
868
869 /* Negotiate the mailbox API version */
870 msg[0] = IXGBE_VF_API_NEGOTIATE;
871 msg[1] = api;
872 msg[2] = 0;
873
874 err = ixgbevf_write_msg_read_ack(hw, msg, msg, ARRAY_SIZE(msg));
875 if (!err) {
876 msg[0] &= ~IXGBE_VT_MSGTYPE_CTS;
877
878 /* Store value and return 0 on success */
879 if (msg[0] == (IXGBE_VF_API_NEGOTIATE | IXGBE_VT_MSGTYPE_ACK)) {
880 hw->api_version = api;
881 return 0;
882 }
883
884 err = IXGBE_ERR_INVALID_ARGUMENT;
885 }
886
887 return err;
888}
889
890/**
891 * ixgbevf_hv_negotiate_api_version_vf - Negotiate supported API version
892 * @hw: pointer to the HW structure
893 * @api: integer containing requested API version
894 * Hyper-V version - only ixgbe_mbox_api_10 supported.
895 **/
896static int ixgbevf_hv_negotiate_api_version_vf(struct ixgbe_hw *hw, int api)
897{
898 /* Hyper-V only supports api version ixgbe_mbox_api_10 */
899 if (api != ixgbe_mbox_api_10)
900 return IXGBE_ERR_INVALID_ARGUMENT;
901
902 return 0;
903}
904
905int ixgbevf_get_queues(struct ixgbe_hw *hw, unsigned int *num_tcs,
906 unsigned int *default_tc)
907{
908 int err;
909 u32 msg[5];
910
911 /* do nothing if API doesn't support ixgbevf_get_queues */
912 switch (hw->api_version) {
913 case ixgbe_mbox_api_11:
914 case ixgbe_mbox_api_12:
915 case ixgbe_mbox_api_13:
916 break;
917 default:
918 return 0;
919 }
920
921 /* Fetch queue configuration from the PF */
922 msg[0] = IXGBE_VF_GET_QUEUE;
923 msg[1] = msg[2] = msg[3] = msg[4] = 0;
924
925 err = ixgbevf_write_msg_read_ack(hw, msg, msg, ARRAY_SIZE(msg));
926 if (!err) {
927 msg[0] &= ~IXGBE_VT_MSGTYPE_CTS;
928
929 /* if we we didn't get an ACK there must have been
930 * some sort of mailbox error so we should treat it
931 * as such
932 */
933 if (msg[0] != (IXGBE_VF_GET_QUEUE | IXGBE_VT_MSGTYPE_ACK))
934 return IXGBE_ERR_MBX;
935
936 /* record and validate values from message */
937 hw->mac.max_tx_queues = msg[IXGBE_VF_TX_QUEUES];
938 if (hw->mac.max_tx_queues == 0 ||
939 hw->mac.max_tx_queues > IXGBE_VF_MAX_TX_QUEUES)
940 hw->mac.max_tx_queues = IXGBE_VF_MAX_TX_QUEUES;
941
942 hw->mac.max_rx_queues = msg[IXGBE_VF_RX_QUEUES];
943 if (hw->mac.max_rx_queues == 0 ||
944 hw->mac.max_rx_queues > IXGBE_VF_MAX_RX_QUEUES)
945 hw->mac.max_rx_queues = IXGBE_VF_MAX_RX_QUEUES;
946
947 *num_tcs = msg[IXGBE_VF_TRANS_VLAN];
948 /* in case of unknown state assume we cannot tag frames */
949 if (*num_tcs > hw->mac.max_rx_queues)
950 *num_tcs = 1;
951
952 *default_tc = msg[IXGBE_VF_DEF_QUEUE];
953 /* default to queue 0 on out-of-bounds queue number */
954 if (*default_tc >= hw->mac.max_tx_queues)
955 *default_tc = 0;
956 }
957
958 return err;
959}
960
961static const struct ixgbe_mac_operations ixgbevf_mac_ops = {
962 .init_hw = ixgbevf_init_hw_vf,
963 .reset_hw = ixgbevf_reset_hw_vf,
964 .start_hw = ixgbevf_start_hw_vf,
965 .get_mac_addr = ixgbevf_get_mac_addr_vf,
966 .stop_adapter = ixgbevf_stop_hw_vf,
967 .setup_link = ixgbevf_setup_mac_link_vf,
968 .check_link = ixgbevf_check_mac_link_vf,
969 .negotiate_api_version = ixgbevf_negotiate_api_version_vf,
970 .set_rar = ixgbevf_set_rar_vf,
971 .update_mc_addr_list = ixgbevf_update_mc_addr_list_vf,
972 .update_xcast_mode = ixgbevf_update_xcast_mode,
973 .set_uc_addr = ixgbevf_set_uc_addr_vf,
974 .set_vfta = ixgbevf_set_vfta_vf,
975 .set_rlpml = ixgbevf_set_rlpml_vf,
976};
977
978static const struct ixgbe_mac_operations ixgbevf_hv_mac_ops = {
979 .init_hw = ixgbevf_init_hw_vf,
980 .reset_hw = ixgbevf_hv_reset_hw_vf,
981 .start_hw = ixgbevf_start_hw_vf,
982 .get_mac_addr = ixgbevf_get_mac_addr_vf,
983 .stop_adapter = ixgbevf_stop_hw_vf,
984 .setup_link = ixgbevf_setup_mac_link_vf,
985 .check_link = ixgbevf_hv_check_mac_link_vf,
986 .negotiate_api_version = ixgbevf_hv_negotiate_api_version_vf,
987 .set_rar = ixgbevf_hv_set_rar_vf,
988 .update_mc_addr_list = ixgbevf_hv_update_mc_addr_list_vf,
989 .update_xcast_mode = ixgbevf_hv_update_xcast_mode,
990 .set_uc_addr = ixgbevf_hv_set_uc_addr_vf,
991 .set_vfta = ixgbevf_hv_set_vfta_vf,
992 .set_rlpml = ixgbevf_hv_set_rlpml_vf,
993};
994
995const struct ixgbevf_info ixgbevf_82599_vf_info = {
996 .mac = ixgbe_mac_82599_vf,
997 .mac_ops = &ixgbevf_mac_ops,
998};
999
1000const struct ixgbevf_info ixgbevf_82599_vf_hv_info = {
1001 .mac = ixgbe_mac_82599_vf,
1002 .mac_ops = &ixgbevf_hv_mac_ops,
1003};
1004
1005const struct ixgbevf_info ixgbevf_X540_vf_info = {
1006 .mac = ixgbe_mac_X540_vf,
1007 .mac_ops = &ixgbevf_mac_ops,
1008};
1009
1010const struct ixgbevf_info ixgbevf_X540_vf_hv_info = {
1011 .mac = ixgbe_mac_X540_vf,
1012 .mac_ops = &ixgbevf_hv_mac_ops,
1013};
1014
1015const struct ixgbevf_info ixgbevf_X550_vf_info = {
1016 .mac = ixgbe_mac_X550_vf,
1017 .mac_ops = &ixgbevf_mac_ops,
1018};
1019
1020const struct ixgbevf_info ixgbevf_X550_vf_hv_info = {
1021 .mac = ixgbe_mac_X550_vf,
1022 .mac_ops = &ixgbevf_hv_mac_ops,
1023};
1024
1025const struct ixgbevf_info ixgbevf_X550EM_x_vf_info = {
1026 .mac = ixgbe_mac_X550EM_x_vf,
1027 .mac_ops = &ixgbevf_mac_ops,
1028};
1029
1030const struct ixgbevf_info ixgbevf_X550EM_x_vf_hv_info = {
1031 .mac = ixgbe_mac_X550EM_x_vf,
1032 .mac_ops = &ixgbevf_hv_mac_ops,
1033};
1034
1035const struct ixgbevf_info ixgbevf_x550em_a_vf_info = {
1036 .mac = ixgbe_mac_x550em_a_vf,
1037 .mac_ops = &ixgbevf_mac_ops,
1038};