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Merge remote-tracking branches 'regulator/topic/tps65218' and 'regulator/topic/tps800...
[deliverable/linux.git] / drivers / net / ethernet / intel / ixgbevf / vf.c
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
36 static 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 **/
57 static 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 **/
72 static 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 **/
88 static 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 */
150 static s32 ixgbevf_hv_reset_hw_vf(struct ixgbe_hw *hw)
151 {
152 #if IS_ENABLED(CONFIG_PCI_MMCONFIG)
153 struct ixgbevf_adapter *adapter = hw->back;
154 int i;
155
156 for (i = 0; i < 6; i++)
157 pci_read_config_byte(adapter->pdev,
158 (i + IXGBE_HV_RESET_OFFSET),
159 &hw->mac.perm_addr[i]);
160 return 0;
161 #else
162 pr_err("PCI_MMCONFIG needs to be enabled for Hyper-V\n");
163 return -EOPNOTSUPP;
164 #endif
165 }
166
167 /**
168 * ixgbevf_stop_hw_vf - Generic stop Tx/Rx units
169 * @hw: pointer to hardware structure
170 *
171 * Sets the adapter_stopped flag within ixgbe_hw struct. Clears interrupts,
172 * disables transmit and receive units. The adapter_stopped flag is used by
173 * the shared code and drivers to determine if the adapter is in a stopped
174 * state and should not touch the hardware.
175 **/
176 static s32 ixgbevf_stop_hw_vf(struct ixgbe_hw *hw)
177 {
178 u32 number_of_queues;
179 u32 reg_val;
180 u16 i;
181
182 /* Set the adapter_stopped flag so other driver functions stop touching
183 * the hardware
184 */
185 hw->adapter_stopped = true;
186
187 /* Disable the receive unit by stopped each queue */
188 number_of_queues = hw->mac.max_rx_queues;
189 for (i = 0; i < number_of_queues; i++) {
190 reg_val = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(i));
191 if (reg_val & IXGBE_RXDCTL_ENABLE) {
192 reg_val &= ~IXGBE_RXDCTL_ENABLE;
193 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(i), reg_val);
194 }
195 }
196
197 IXGBE_WRITE_FLUSH(hw);
198
199 /* Clear interrupt mask to stop from interrupts being generated */
200 IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, IXGBE_VF_IRQ_CLEAR_MASK);
201
202 /* Clear any pending interrupts */
203 IXGBE_READ_REG(hw, IXGBE_VTEICR);
204
205 /* Disable the transmit unit. Each queue must be disabled. */
206 number_of_queues = hw->mac.max_tx_queues;
207 for (i = 0; i < number_of_queues; i++) {
208 reg_val = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(i));
209 if (reg_val & IXGBE_TXDCTL_ENABLE) {
210 reg_val &= ~IXGBE_TXDCTL_ENABLE;
211 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(i), reg_val);
212 }
213 }
214
215 return 0;
216 }
217
218 /**
219 * ixgbevf_mta_vector - Determines bit-vector in multicast table to set
220 * @hw: pointer to hardware structure
221 * @mc_addr: the multicast address
222 *
223 * Extracts the 12 bits, from a multicast address, to determine which
224 * bit-vector to set in the multicast table. The hardware uses 12 bits, from
225 * incoming Rx multicast addresses, to determine the bit-vector to check in
226 * the MTA. Which of the 4 combination, of 12-bits, the hardware uses is set
227 * by the MO field of the MCSTCTRL. The MO field is set during initialization
228 * to mc_filter_type.
229 **/
230 static s32 ixgbevf_mta_vector(struct ixgbe_hw *hw, u8 *mc_addr)
231 {
232 u32 vector = 0;
233
234 switch (hw->mac.mc_filter_type) {
235 case 0: /* use bits [47:36] of the address */
236 vector = ((mc_addr[4] >> 4) | (((u16)mc_addr[5]) << 4));
237 break;
238 case 1: /* use bits [46:35] of the address */
239 vector = ((mc_addr[4] >> 3) | (((u16)mc_addr[5]) << 5));
240 break;
241 case 2: /* use bits [45:34] of the address */
242 vector = ((mc_addr[4] >> 2) | (((u16)mc_addr[5]) << 6));
243 break;
244 case 3: /* use bits [43:32] of the address */
245 vector = ((mc_addr[4]) | (((u16)mc_addr[5]) << 8));
246 break;
247 default: /* Invalid mc_filter_type */
248 break;
249 }
250
251 /* vector can only be 12-bits or boundary will be exceeded */
252 vector &= 0xFFF;
253 return vector;
254 }
255
256 /**
257 * ixgbevf_get_mac_addr_vf - Read device MAC address
258 * @hw: pointer to the HW structure
259 * @mac_addr: pointer to storage for retrieved MAC address
260 **/
261 static s32 ixgbevf_get_mac_addr_vf(struct ixgbe_hw *hw, u8 *mac_addr)
262 {
263 ether_addr_copy(mac_addr, hw->mac.perm_addr);
264
265 return 0;
266 }
267
268 static s32 ixgbevf_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr)
269 {
270 u32 msgbuf[3], msgbuf_chk;
271 u8 *msg_addr = (u8 *)(&msgbuf[1]);
272 s32 ret_val;
273
274 memset(msgbuf, 0, sizeof(msgbuf));
275 /* If index is one then this is the start of a new list and needs
276 * indication to the PF so it can do it's own list management.
277 * If it is zero then that tells the PF to just clear all of
278 * this VF's macvlans and there is no new list.
279 */
280 msgbuf[0] |= index << IXGBE_VT_MSGINFO_SHIFT;
281 msgbuf[0] |= IXGBE_VF_SET_MACVLAN;
282 msgbuf_chk = msgbuf[0];
283
284 if (addr)
285 ether_addr_copy(msg_addr, addr);
286
287 ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 3);
288 if (!ret_val) {
289 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
290
291 if (msgbuf[0] == (msgbuf_chk | IXGBE_VT_MSGTYPE_NACK))
292 return -ENOMEM;
293 }
294
295 return ret_val;
296 }
297
298 static s32 ixgbevf_hv_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr)
299 {
300 return -EOPNOTSUPP;
301 }
302
303 /**
304 * ixgbevf_get_reta_locked - get the RSS redirection table (RETA) contents.
305 * @adapter: pointer to the port handle
306 * @reta: buffer to fill with RETA contents.
307 * @num_rx_queues: Number of Rx queues configured for this port
308 *
309 * The "reta" buffer should be big enough to contain 32 registers.
310 *
311 * Returns: 0 on success.
312 * if API doesn't support this operation - (-EOPNOTSUPP).
313 */
314 int ixgbevf_get_reta_locked(struct ixgbe_hw *hw, u32 *reta, int num_rx_queues)
315 {
316 int err, i, j;
317 u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
318 u32 *hw_reta = &msgbuf[1];
319 u32 mask = 0;
320
321 /* We have to use a mailbox for 82599 and x540 devices only.
322 * For these devices RETA has 128 entries.
323 * Also these VFs support up to 4 RSS queues. Therefore PF will compress
324 * 16 RETA entries in each DWORD giving 2 bits to each entry.
325 */
326 int dwords = IXGBEVF_82599_RETA_SIZE / 16;
327
328 /* We support the RSS querying for 82599 and x540 devices only.
329 * Thus return an error if API doesn't support RETA querying or querying
330 * is not supported for this device type.
331 */
332 if (hw->api_version != ixgbe_mbox_api_12 ||
333 hw->mac.type >= ixgbe_mac_X550_vf)
334 return -EOPNOTSUPP;
335
336 msgbuf[0] = IXGBE_VF_GET_RETA;
337
338 err = hw->mbx.ops.write_posted(hw, msgbuf, 1);
339
340 if (err)
341 return err;
342
343 err = hw->mbx.ops.read_posted(hw, msgbuf, dwords + 1);
344
345 if (err)
346 return err;
347
348 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
349
350 /* If the operation has been refused by a PF return -EPERM */
351 if (msgbuf[0] == (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_NACK))
352 return -EPERM;
353
354 /* If we didn't get an ACK there must have been
355 * some sort of mailbox error so we should treat it
356 * as such.
357 */
358 if (msgbuf[0] != (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_ACK))
359 return IXGBE_ERR_MBX;
360
361 /* ixgbevf doesn't support more than 2 queues at the moment */
362 if (num_rx_queues > 1)
363 mask = 0x1;
364
365 for (i = 0; i < dwords; i++)
366 for (j = 0; j < 16; j++)
367 reta[i * 16 + j] = (hw_reta[i] >> (2 * j)) & mask;
368
369 return 0;
370 }
371
372 /**
373 * ixgbevf_get_rss_key_locked - get the RSS Random Key
374 * @hw: pointer to the HW structure
375 * @rss_key: buffer to fill with RSS Hash Key contents.
376 *
377 * The "rss_key" buffer should be big enough to contain 10 registers.
378 *
379 * Returns: 0 on success.
380 * if API doesn't support this operation - (-EOPNOTSUPP).
381 */
382 int ixgbevf_get_rss_key_locked(struct ixgbe_hw *hw, u8 *rss_key)
383 {
384 int err;
385 u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
386
387 /* We currently support the RSS Random Key retrieval for 82599 and x540
388 * devices only.
389 *
390 * Thus return an error if API doesn't support RSS Random Key retrieval
391 * or if the operation is not supported for this device type.
392 */
393 if (hw->api_version != ixgbe_mbox_api_12 ||
394 hw->mac.type >= ixgbe_mac_X550_vf)
395 return -EOPNOTSUPP;
396
397 msgbuf[0] = IXGBE_VF_GET_RSS_KEY;
398 err = hw->mbx.ops.write_posted(hw, msgbuf, 1);
399
400 if (err)
401 return err;
402
403 err = hw->mbx.ops.read_posted(hw, msgbuf, 11);
404
405 if (err)
406 return err;
407
408 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
409
410 /* If the operation has been refused by a PF return -EPERM */
411 if (msgbuf[0] == (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_NACK))
412 return -EPERM;
413
414 /* If we didn't get an ACK there must have been
415 * some sort of mailbox error so we should treat it
416 * as such.
417 */
418 if (msgbuf[0] != (IXGBE_VF_GET_RSS_KEY | IXGBE_VT_MSGTYPE_ACK))
419 return IXGBE_ERR_MBX;
420
421 memcpy(rss_key, msgbuf + 1, IXGBEVF_RSS_HASH_KEY_SIZE);
422
423 return 0;
424 }
425
426 /**
427 * ixgbevf_set_rar_vf - set device MAC address
428 * @hw: pointer to hardware structure
429 * @index: Receive address register to write
430 * @addr: Address to put into receive address register
431 * @vmdq: Unused in this implementation
432 **/
433 static s32 ixgbevf_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr,
434 u32 vmdq)
435 {
436 u32 msgbuf[3];
437 u8 *msg_addr = (u8 *)(&msgbuf[1]);
438 s32 ret_val;
439
440 memset(msgbuf, 0, sizeof(msgbuf));
441 msgbuf[0] = IXGBE_VF_SET_MAC_ADDR;
442 ether_addr_copy(msg_addr, addr);
443
444 ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 2);
445
446 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
447
448 /* if nacked the address was rejected, use "perm_addr" */
449 if (!ret_val &&
450 (msgbuf[0] == (IXGBE_VF_SET_MAC_ADDR | IXGBE_VT_MSGTYPE_NACK))) {
451 ixgbevf_get_mac_addr_vf(hw, hw->mac.addr);
452 return IXGBE_ERR_MBX;
453 }
454
455 return ret_val;
456 }
457
458 /**
459 * ixgbevf_hv_set_rar_vf - set device MAC address Hyper-V variant
460 * @hw: pointer to hardware structure
461 * @index: Receive address register to write
462 * @addr: Address to put into receive address register
463 * @vmdq: Unused in this implementation
464 *
465 * We don't really allow setting the device MAC address. However,
466 * if the address being set is the permanent MAC address we will
467 * permit that.
468 **/
469 static s32 ixgbevf_hv_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr,
470 u32 vmdq)
471 {
472 if (ether_addr_equal(addr, hw->mac.perm_addr))
473 return 0;
474
475 return -EOPNOTSUPP;
476 }
477
478 /**
479 * ixgbevf_update_mc_addr_list_vf - Update Multicast addresses
480 * @hw: pointer to the HW structure
481 * @netdev: pointer to net device structure
482 *
483 * Updates the Multicast Table Array.
484 **/
485 static s32 ixgbevf_update_mc_addr_list_vf(struct ixgbe_hw *hw,
486 struct net_device *netdev)
487 {
488 struct netdev_hw_addr *ha;
489 u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
490 u16 *vector_list = (u16 *)&msgbuf[1];
491 u32 cnt, i;
492
493 /* Each entry in the list uses 1 16 bit word. We have 30
494 * 16 bit words available in our HW msg buffer (minus 1 for the
495 * msg type). That's 30 hash values if we pack 'em right. If
496 * there are more than 30 MC addresses to add then punt the
497 * extras for now and then add code to handle more than 30 later.
498 * It would be unusual for a server to request that many multi-cast
499 * addresses except for in large enterprise network environments.
500 */
501
502 cnt = netdev_mc_count(netdev);
503 if (cnt > 30)
504 cnt = 30;
505 msgbuf[0] = IXGBE_VF_SET_MULTICAST;
506 msgbuf[0] |= cnt << IXGBE_VT_MSGINFO_SHIFT;
507
508 i = 0;
509 netdev_for_each_mc_addr(ha, netdev) {
510 if (i == cnt)
511 break;
512 if (is_link_local_ether_addr(ha->addr))
513 continue;
514
515 vector_list[i++] = ixgbevf_mta_vector(hw, ha->addr);
516 }
517
518 ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, IXGBE_VFMAILBOX_SIZE);
519
520 return 0;
521 }
522
523 /**
524 * Hyper-V variant - just a stub.
525 */
526 static s32 ixgbevf_hv_update_mc_addr_list_vf(struct ixgbe_hw *hw,
527 struct net_device *netdev)
528 {
529 return -EOPNOTSUPP;
530 }
531
532 /**
533 * ixgbevf_update_xcast_mode - Update Multicast mode
534 * @hw: pointer to the HW structure
535 * @xcast_mode: new multicast mode
536 *
537 * Updates the Multicast Mode of VF.
538 **/
539 static s32 ixgbevf_update_xcast_mode(struct ixgbe_hw *hw, int xcast_mode)
540 {
541 u32 msgbuf[2];
542 s32 err;
543
544 switch (hw->api_version) {
545 case ixgbe_mbox_api_12:
546 break;
547 default:
548 return -EOPNOTSUPP;
549 }
550
551 msgbuf[0] = IXGBE_VF_UPDATE_XCAST_MODE;
552 msgbuf[1] = xcast_mode;
553
554 err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 2);
555 if (err)
556 return err;
557
558 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
559 if (msgbuf[0] == (IXGBE_VF_UPDATE_XCAST_MODE | IXGBE_VT_MSGTYPE_NACK))
560 return -EPERM;
561
562 return 0;
563 }
564
565 /**
566 * Hyper-V variant - just a stub.
567 */
568 static s32 ixgbevf_hv_update_xcast_mode(struct ixgbe_hw *hw, int xcast_mode)
569 {
570 return -EOPNOTSUPP;
571 }
572
573 /**
574 * ixgbevf_set_vfta_vf - Set/Unset VLAN filter table address
575 * @hw: pointer to the HW structure
576 * @vlan: 12 bit VLAN ID
577 * @vind: unused by VF drivers
578 * @vlan_on: if true then set bit, else clear bit
579 **/
580 static s32 ixgbevf_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind,
581 bool vlan_on)
582 {
583 u32 msgbuf[2];
584 s32 err;
585
586 msgbuf[0] = IXGBE_VF_SET_VLAN;
587 msgbuf[1] = vlan;
588 /* Setting the 8 bit field MSG INFO to TRUE indicates "add" */
589 msgbuf[0] |= vlan_on << IXGBE_VT_MSGINFO_SHIFT;
590
591 err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 2);
592 if (err)
593 goto mbx_err;
594
595 /* remove extra bits from the message */
596 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
597 msgbuf[0] &= ~(0xFF << IXGBE_VT_MSGINFO_SHIFT);
598
599 if (msgbuf[0] != (IXGBE_VF_SET_VLAN | IXGBE_VT_MSGTYPE_ACK))
600 err = IXGBE_ERR_INVALID_ARGUMENT;
601
602 mbx_err:
603 return err;
604 }
605
606 /**
607 * Hyper-V variant - just a stub.
608 */
609 static s32 ixgbevf_hv_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind,
610 bool vlan_on)
611 {
612 return -EOPNOTSUPP;
613 }
614
615 /**
616 * ixgbevf_setup_mac_link_vf - Setup MAC link settings
617 * @hw: pointer to hardware structure
618 * @speed: Unused in this implementation
619 * @autoneg: Unused in this implementation
620 * @autoneg_wait_to_complete: Unused in this implementation
621 *
622 * Do nothing and return success. VF drivers are not allowed to change
623 * global settings. Maintained for driver compatibility.
624 **/
625 static s32 ixgbevf_setup_mac_link_vf(struct ixgbe_hw *hw,
626 ixgbe_link_speed speed, bool autoneg,
627 bool autoneg_wait_to_complete)
628 {
629 return 0;
630 }
631
632 /**
633 * ixgbevf_check_mac_link_vf - Get link/speed status
634 * @hw: pointer to hardware structure
635 * @speed: pointer to link speed
636 * @link_up: true is link is up, false otherwise
637 * @autoneg_wait_to_complete: true when waiting for completion is needed
638 *
639 * Reads the links register to determine if link is up and the current speed
640 **/
641 static s32 ixgbevf_check_mac_link_vf(struct ixgbe_hw *hw,
642 ixgbe_link_speed *speed,
643 bool *link_up,
644 bool autoneg_wait_to_complete)
645 {
646 struct ixgbe_mbx_info *mbx = &hw->mbx;
647 struct ixgbe_mac_info *mac = &hw->mac;
648 s32 ret_val = 0;
649 u32 links_reg;
650 u32 in_msg = 0;
651
652 /* If we were hit with a reset drop the link */
653 if (!mbx->ops.check_for_rst(hw) || !mbx->timeout)
654 mac->get_link_status = true;
655
656 if (!mac->get_link_status)
657 goto out;
658
659 /* if link status is down no point in checking to see if pf is up */
660 links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
661 if (!(links_reg & IXGBE_LINKS_UP))
662 goto out;
663
664 /* for SFP+ modules and DA cables on 82599 it can take up to 500usecs
665 * before the link status is correct
666 */
667 if (mac->type == ixgbe_mac_82599_vf) {
668 int i;
669
670 for (i = 0; i < 5; i++) {
671 udelay(100);
672 links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
673
674 if (!(links_reg & IXGBE_LINKS_UP))
675 goto out;
676 }
677 }
678
679 switch (links_reg & IXGBE_LINKS_SPEED_82599) {
680 case IXGBE_LINKS_SPEED_10G_82599:
681 *speed = IXGBE_LINK_SPEED_10GB_FULL;
682 break;
683 case IXGBE_LINKS_SPEED_1G_82599:
684 *speed = IXGBE_LINK_SPEED_1GB_FULL;
685 break;
686 case IXGBE_LINKS_SPEED_100_82599:
687 *speed = IXGBE_LINK_SPEED_100_FULL;
688 break;
689 }
690
691 /* if the read failed it could just be a mailbox collision, best wait
692 * until we are called again and don't report an error
693 */
694 if (mbx->ops.read(hw, &in_msg, 1))
695 goto out;
696
697 if (!(in_msg & IXGBE_VT_MSGTYPE_CTS)) {
698 /* msg is not CTS and is NACK we must have lost CTS status */
699 if (in_msg & IXGBE_VT_MSGTYPE_NACK)
700 ret_val = -1;
701 goto out;
702 }
703
704 /* the pf is talking, if we timed out in the past we reinit */
705 if (!mbx->timeout) {
706 ret_val = -1;
707 goto out;
708 }
709
710 /* if we passed all the tests above then the link is up and we no
711 * longer need to check for link
712 */
713 mac->get_link_status = false;
714
715 out:
716 *link_up = !mac->get_link_status;
717 return ret_val;
718 }
719
720 /**
721 * Hyper-V variant; there is no mailbox communication.
722 */
723 static s32 ixgbevf_hv_check_mac_link_vf(struct ixgbe_hw *hw,
724 ixgbe_link_speed *speed,
725 bool *link_up,
726 bool autoneg_wait_to_complete)
727 {
728 struct ixgbe_mbx_info *mbx = &hw->mbx;
729 struct ixgbe_mac_info *mac = &hw->mac;
730 u32 links_reg;
731
732 /* If we were hit with a reset drop the link */
733 if (!mbx->ops.check_for_rst(hw) || !mbx->timeout)
734 mac->get_link_status = true;
735
736 if (!mac->get_link_status)
737 goto out;
738
739 /* if link status is down no point in checking to see if pf is up */
740 links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
741 if (!(links_reg & IXGBE_LINKS_UP))
742 goto out;
743
744 /* for SFP+ modules and DA cables on 82599 it can take up to 500usecs
745 * before the link status is correct
746 */
747 if (mac->type == ixgbe_mac_82599_vf) {
748 int i;
749
750 for (i = 0; i < 5; i++) {
751 udelay(100);
752 links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
753
754 if (!(links_reg & IXGBE_LINKS_UP))
755 goto out;
756 }
757 }
758
759 switch (links_reg & IXGBE_LINKS_SPEED_82599) {
760 case IXGBE_LINKS_SPEED_10G_82599:
761 *speed = IXGBE_LINK_SPEED_10GB_FULL;
762 break;
763 case IXGBE_LINKS_SPEED_1G_82599:
764 *speed = IXGBE_LINK_SPEED_1GB_FULL;
765 break;
766 case IXGBE_LINKS_SPEED_100_82599:
767 *speed = IXGBE_LINK_SPEED_100_FULL;
768 break;
769 }
770
771 /* if we passed all the tests above then the link is up and we no
772 * longer need to check for link
773 */
774 mac->get_link_status = false;
775
776 out:
777 *link_up = !mac->get_link_status;
778 return 0;
779 }
780
781 /**
782 * ixgbevf_set_rlpml_vf - Set the maximum receive packet length
783 * @hw: pointer to the HW structure
784 * @max_size: value to assign to max frame size
785 **/
786 static s32 ixgbevf_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size)
787 {
788 u32 msgbuf[2];
789 s32 ret_val;
790
791 msgbuf[0] = IXGBE_VF_SET_LPE;
792 msgbuf[1] = max_size;
793
794 ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 2);
795 if (ret_val)
796 return ret_val;
797 if ((msgbuf[0] & IXGBE_VF_SET_LPE) &&
798 (msgbuf[0] & IXGBE_VT_MSGTYPE_NACK))
799 return IXGBE_ERR_MBX;
800
801 return 0;
802 }
803
804 /**
805 * ixgbevf_hv_set_rlpml_vf - Set the maximum receive packet length
806 * @hw: pointer to the HW structure
807 * @max_size: value to assign to max frame size
808 * Hyper-V variant.
809 **/
810 static s32 ixgbevf_hv_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size)
811 {
812 u32 reg;
813
814 /* If we are on Hyper-V, we implement this functionality
815 * differently.
816 */
817 reg = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(0));
818 /* CRC == 4 */
819 reg |= ((max_size + 4) | IXGBE_RXDCTL_RLPML_EN);
820 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(0), reg);
821
822 return 0;
823 }
824
825 /**
826 * ixgbevf_negotiate_api_version_vf - Negotiate supported API version
827 * @hw: pointer to the HW structure
828 * @api: integer containing requested API version
829 **/
830 static int ixgbevf_negotiate_api_version_vf(struct ixgbe_hw *hw, int api)
831 {
832 int err;
833 u32 msg[3];
834
835 /* Negotiate the mailbox API version */
836 msg[0] = IXGBE_VF_API_NEGOTIATE;
837 msg[1] = api;
838 msg[2] = 0;
839
840 err = ixgbevf_write_msg_read_ack(hw, msg, msg, 3);
841 if (!err) {
842 msg[0] &= ~IXGBE_VT_MSGTYPE_CTS;
843
844 /* Store value and return 0 on success */
845 if (msg[0] == (IXGBE_VF_API_NEGOTIATE | IXGBE_VT_MSGTYPE_ACK)) {
846 hw->api_version = api;
847 return 0;
848 }
849
850 err = IXGBE_ERR_INVALID_ARGUMENT;
851 }
852
853 return err;
854 }
855
856 /**
857 * ixgbevf_hv_negotiate_api_version_vf - Negotiate supported API version
858 * @hw: pointer to the HW structure
859 * @api: integer containing requested API version
860 * Hyper-V version - only ixgbe_mbox_api_10 supported.
861 **/
862 static int ixgbevf_hv_negotiate_api_version_vf(struct ixgbe_hw *hw, int api)
863 {
864 /* Hyper-V only supports api version ixgbe_mbox_api_10 */
865 if (api != ixgbe_mbox_api_10)
866 return IXGBE_ERR_INVALID_ARGUMENT;
867
868 return 0;
869 }
870
871 int ixgbevf_get_queues(struct ixgbe_hw *hw, unsigned int *num_tcs,
872 unsigned int *default_tc)
873 {
874 int err;
875 u32 msg[5];
876
877 /* do nothing if API doesn't support ixgbevf_get_queues */
878 switch (hw->api_version) {
879 case ixgbe_mbox_api_11:
880 case ixgbe_mbox_api_12:
881 break;
882 default:
883 return 0;
884 }
885
886 /* Fetch queue configuration from the PF */
887 msg[0] = IXGBE_VF_GET_QUEUE;
888 msg[1] = msg[2] = msg[3] = msg[4] = 0;
889
890 err = ixgbevf_write_msg_read_ack(hw, msg, msg, 5);
891 if (!err) {
892 msg[0] &= ~IXGBE_VT_MSGTYPE_CTS;
893
894 /* if we we didn't get an ACK there must have been
895 * some sort of mailbox error so we should treat it
896 * as such
897 */
898 if (msg[0] != (IXGBE_VF_GET_QUEUE | IXGBE_VT_MSGTYPE_ACK))
899 return IXGBE_ERR_MBX;
900
901 /* record and validate values from message */
902 hw->mac.max_tx_queues = msg[IXGBE_VF_TX_QUEUES];
903 if (hw->mac.max_tx_queues == 0 ||
904 hw->mac.max_tx_queues > IXGBE_VF_MAX_TX_QUEUES)
905 hw->mac.max_tx_queues = IXGBE_VF_MAX_TX_QUEUES;
906
907 hw->mac.max_rx_queues = msg[IXGBE_VF_RX_QUEUES];
908 if (hw->mac.max_rx_queues == 0 ||
909 hw->mac.max_rx_queues > IXGBE_VF_MAX_RX_QUEUES)
910 hw->mac.max_rx_queues = IXGBE_VF_MAX_RX_QUEUES;
911
912 *num_tcs = msg[IXGBE_VF_TRANS_VLAN];
913 /* in case of unknown state assume we cannot tag frames */
914 if (*num_tcs > hw->mac.max_rx_queues)
915 *num_tcs = 1;
916
917 *default_tc = msg[IXGBE_VF_DEF_QUEUE];
918 /* default to queue 0 on out-of-bounds queue number */
919 if (*default_tc >= hw->mac.max_tx_queues)
920 *default_tc = 0;
921 }
922
923 return err;
924 }
925
926 static const struct ixgbe_mac_operations ixgbevf_mac_ops = {
927 .init_hw = ixgbevf_init_hw_vf,
928 .reset_hw = ixgbevf_reset_hw_vf,
929 .start_hw = ixgbevf_start_hw_vf,
930 .get_mac_addr = ixgbevf_get_mac_addr_vf,
931 .stop_adapter = ixgbevf_stop_hw_vf,
932 .setup_link = ixgbevf_setup_mac_link_vf,
933 .check_link = ixgbevf_check_mac_link_vf,
934 .negotiate_api_version = ixgbevf_negotiate_api_version_vf,
935 .set_rar = ixgbevf_set_rar_vf,
936 .update_mc_addr_list = ixgbevf_update_mc_addr_list_vf,
937 .update_xcast_mode = ixgbevf_update_xcast_mode,
938 .set_uc_addr = ixgbevf_set_uc_addr_vf,
939 .set_vfta = ixgbevf_set_vfta_vf,
940 .set_rlpml = ixgbevf_set_rlpml_vf,
941 };
942
943 static const struct ixgbe_mac_operations ixgbevf_hv_mac_ops = {
944 .init_hw = ixgbevf_init_hw_vf,
945 .reset_hw = ixgbevf_hv_reset_hw_vf,
946 .start_hw = ixgbevf_start_hw_vf,
947 .get_mac_addr = ixgbevf_get_mac_addr_vf,
948 .stop_adapter = ixgbevf_stop_hw_vf,
949 .setup_link = ixgbevf_setup_mac_link_vf,
950 .check_link = ixgbevf_hv_check_mac_link_vf,
951 .negotiate_api_version = ixgbevf_hv_negotiate_api_version_vf,
952 .set_rar = ixgbevf_hv_set_rar_vf,
953 .update_mc_addr_list = ixgbevf_hv_update_mc_addr_list_vf,
954 .update_xcast_mode = ixgbevf_hv_update_xcast_mode,
955 .set_uc_addr = ixgbevf_hv_set_uc_addr_vf,
956 .set_vfta = ixgbevf_hv_set_vfta_vf,
957 .set_rlpml = ixgbevf_hv_set_rlpml_vf,
958 };
959
960 const struct ixgbevf_info ixgbevf_82599_vf_info = {
961 .mac = ixgbe_mac_82599_vf,
962 .mac_ops = &ixgbevf_mac_ops,
963 };
964
965 const struct ixgbevf_info ixgbevf_82599_vf_hv_info = {
966 .mac = ixgbe_mac_82599_vf,
967 .mac_ops = &ixgbevf_hv_mac_ops,
968 };
969
970 const struct ixgbevf_info ixgbevf_X540_vf_info = {
971 .mac = ixgbe_mac_X540_vf,
972 .mac_ops = &ixgbevf_mac_ops,
973 };
974
975 const struct ixgbevf_info ixgbevf_X540_vf_hv_info = {
976 .mac = ixgbe_mac_X540_vf,
977 .mac_ops = &ixgbevf_hv_mac_ops,
978 };
979
980 const struct ixgbevf_info ixgbevf_X550_vf_info = {
981 .mac = ixgbe_mac_X550_vf,
982 .mac_ops = &ixgbevf_mac_ops,
983 };
984
985 const struct ixgbevf_info ixgbevf_X550_vf_hv_info = {
986 .mac = ixgbe_mac_X550_vf,
987 .mac_ops = &ixgbevf_hv_mac_ops,
988 };
989
990 const struct ixgbevf_info ixgbevf_X550EM_x_vf_info = {
991 .mac = ixgbe_mac_X550EM_x_vf,
992 .mac_ops = &ixgbevf_mac_ops,
993 };
994
995 const struct ixgbevf_info ixgbevf_X550EM_x_vf_hv_info = {
996 .mac = ixgbe_mac_X550EM_x_vf,
997 .mac_ops = &ixgbevf_hv_mac_ops,
998 };
999
1000 const struct ixgbevf_info ixgbevf_x550em_a_vf_info = {
1001 .mac = ixgbe_mac_x550em_a_vf,
1002 .mac_ops = &ixgbevf_mac_ops,
1003 };
Linux kernel - Deliverables
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