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Merge remote-tracking branch 'kspp/for-next/kspp'
[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,
288 sizeof(msgbuf) / sizeof(u32));
289 if (!ret_val) {
290 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
291
292 if (msgbuf[0] == (msgbuf_chk | IXGBE_VT_MSGTYPE_NACK))
293 return -ENOMEM;
294 }
295
296 return ret_val;
297 }
298
299 static s32 ixgbevf_hv_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr)
300 {
301 return -EOPNOTSUPP;
302 }
303
304 /**
305 * ixgbevf_get_reta_locked - get the RSS redirection table (RETA) contents.
306 * @adapter: pointer to the port handle
307 * @reta: buffer to fill with RETA contents.
308 * @num_rx_queues: Number of Rx queues configured for this port
309 *
310 * The "reta" buffer should be big enough to contain 32 registers.
311 *
312 * Returns: 0 on success.
313 * if API doesn't support this operation - (-EOPNOTSUPP).
314 */
315 int ixgbevf_get_reta_locked(struct ixgbe_hw *hw, u32 *reta, int num_rx_queues)
316 {
317 int err, i, j;
318 u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
319 u32 *hw_reta = &msgbuf[1];
320 u32 mask = 0;
321
322 /* We have to use a mailbox for 82599 and x540 devices only.
323 * For these devices RETA has 128 entries.
324 * Also these VFs support up to 4 RSS queues. Therefore PF will compress
325 * 16 RETA entries in each DWORD giving 2 bits to each entry.
326 */
327 int dwords = IXGBEVF_82599_RETA_SIZE / 16;
328
329 /* We support the RSS querying for 82599 and x540 devices only.
330 * Thus return an error if API doesn't support RETA querying or querying
331 * is not supported for this device type.
332 */
333 if (hw->api_version != ixgbe_mbox_api_12 ||
334 hw->mac.type >= ixgbe_mac_X550_vf)
335 return -EOPNOTSUPP;
336
337 msgbuf[0] = IXGBE_VF_GET_RETA;
338
339 err = hw->mbx.ops.write_posted(hw, msgbuf, 1);
340
341 if (err)
342 return err;
343
344 err = hw->mbx.ops.read_posted(hw, msgbuf, dwords + 1);
345
346 if (err)
347 return err;
348
349 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
350
351 /* If the operation has been refused by a PF return -EPERM */
352 if (msgbuf[0] == (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_NACK))
353 return -EPERM;
354
355 /* If we didn't get an ACK there must have been
356 * some sort of mailbox error so we should treat it
357 * as such.
358 */
359 if (msgbuf[0] != (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_ACK))
360 return IXGBE_ERR_MBX;
361
362 /* ixgbevf doesn't support more than 2 queues at the moment */
363 if (num_rx_queues > 1)
364 mask = 0x1;
365
366 for (i = 0; i < dwords; i++)
367 for (j = 0; j < 16; j++)
368 reta[i * 16 + j] = (hw_reta[i] >> (2 * j)) & mask;
369
370 return 0;
371 }
372
373 /**
374 * ixgbevf_get_rss_key_locked - get the RSS Random Key
375 * @hw: pointer to the HW structure
376 * @rss_key: buffer to fill with RSS Hash Key contents.
377 *
378 * The "rss_key" buffer should be big enough to contain 10 registers.
379 *
380 * Returns: 0 on success.
381 * if API doesn't support this operation - (-EOPNOTSUPP).
382 */
383 int ixgbevf_get_rss_key_locked(struct ixgbe_hw *hw, u8 *rss_key)
384 {
385 int err;
386 u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
387
388 /* We currently support the RSS Random Key retrieval for 82599 and x540
389 * devices only.
390 *
391 * Thus return an error if API doesn't support RSS Random Key retrieval
392 * or if the operation is not supported for this device type.
393 */
394 if (hw->api_version != ixgbe_mbox_api_12 ||
395 hw->mac.type >= ixgbe_mac_X550_vf)
396 return -EOPNOTSUPP;
397
398 msgbuf[0] = IXGBE_VF_GET_RSS_KEY;
399 err = hw->mbx.ops.write_posted(hw, msgbuf, 1);
400
401 if (err)
402 return err;
403
404 err = hw->mbx.ops.read_posted(hw, msgbuf, 11);
405
406 if (err)
407 return err;
408
409 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
410
411 /* If the operation has been refused by a PF return -EPERM */
412 if (msgbuf[0] == (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_NACK))
413 return -EPERM;
414
415 /* If we didn't get an ACK there must have been
416 * some sort of mailbox error so we should treat it
417 * as such.
418 */
419 if (msgbuf[0] != (IXGBE_VF_GET_RSS_KEY | IXGBE_VT_MSGTYPE_ACK))
420 return IXGBE_ERR_MBX;
421
422 memcpy(rss_key, msgbuf + 1, IXGBEVF_RSS_HASH_KEY_SIZE);
423
424 return 0;
425 }
426
427 /**
428 * ixgbevf_set_rar_vf - set device MAC address
429 * @hw: pointer to hardware structure
430 * @index: Receive address register to write
431 * @addr: Address to put into receive address register
432 * @vmdq: Unused in this implementation
433 **/
434 static s32 ixgbevf_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr,
435 u32 vmdq)
436 {
437 u32 msgbuf[3];
438 u8 *msg_addr = (u8 *)(&msgbuf[1]);
439 s32 ret_val;
440
441 memset(msgbuf, 0, sizeof(msgbuf));
442 msgbuf[0] = IXGBE_VF_SET_MAC_ADDR;
443 ether_addr_copy(msg_addr, addr);
444
445 ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
446 sizeof(msgbuf) / sizeof(u32));
447
448 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
449
450 /* if nacked the address was rejected, use "perm_addr" */
451 if (!ret_val &&
452 (msgbuf[0] == (IXGBE_VF_SET_MAC_ADDR | IXGBE_VT_MSGTYPE_NACK))) {
453 ixgbevf_get_mac_addr_vf(hw, hw->mac.addr);
454 return IXGBE_ERR_MBX;
455 }
456
457 return ret_val;
458 }
459
460 /**
461 * ixgbevf_hv_set_rar_vf - set device MAC address Hyper-V variant
462 * @hw: pointer to hardware structure
463 * @index: Receive address register to write
464 * @addr: Address to put into receive address register
465 * @vmdq: Unused in this implementation
466 *
467 * We don't really allow setting the device MAC address. However,
468 * if the address being set is the permanent MAC address we will
469 * permit that.
470 **/
471 static s32 ixgbevf_hv_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr,
472 u32 vmdq)
473 {
474 if (ether_addr_equal(addr, hw->mac.perm_addr))
475 return 0;
476
477 return -EOPNOTSUPP;
478 }
479
480 /**
481 * ixgbevf_update_mc_addr_list_vf - Update Multicast addresses
482 * @hw: pointer to the HW structure
483 * @netdev: pointer to net device structure
484 *
485 * Updates the Multicast Table Array.
486 **/
487 static s32 ixgbevf_update_mc_addr_list_vf(struct ixgbe_hw *hw,
488 struct net_device *netdev)
489 {
490 struct netdev_hw_addr *ha;
491 u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
492 u16 *vector_list = (u16 *)&msgbuf[1];
493 u32 cnt, i;
494
495 /* Each entry in the list uses 1 16 bit word. We have 30
496 * 16 bit words available in our HW msg buffer (minus 1 for the
497 * msg type). That's 30 hash values if we pack 'em right. If
498 * there are more than 30 MC addresses to add then punt the
499 * extras for now and then add code to handle more than 30 later.
500 * It would be unusual for a server to request that many multi-cast
501 * addresses except for in large enterprise network environments.
502 */
503
504 cnt = netdev_mc_count(netdev);
505 if (cnt > 30)
506 cnt = 30;
507 msgbuf[0] = IXGBE_VF_SET_MULTICAST;
508 msgbuf[0] |= cnt << IXGBE_VT_MSGINFO_SHIFT;
509
510 i = 0;
511 netdev_for_each_mc_addr(ha, netdev) {
512 if (i == cnt)
513 break;
514 if (is_link_local_ether_addr(ha->addr))
515 continue;
516
517 vector_list[i++] = ixgbevf_mta_vector(hw, ha->addr);
518 }
519
520 ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, IXGBE_VFMAILBOX_SIZE);
521
522 return 0;
523 }
524
525 /**
526 * Hyper-V variant - just a stub.
527 */
528 static 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 **/
541 static 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 break;
549 default:
550 return -EOPNOTSUPP;
551 }
552
553 msgbuf[0] = IXGBE_VF_UPDATE_XCAST_MODE;
554 msgbuf[1] = xcast_mode;
555
556 err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
557 sizeof(msgbuf) / sizeof(u32));
558 if (err)
559 return err;
560
561 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
562 if (msgbuf[0] == (IXGBE_VF_UPDATE_XCAST_MODE | IXGBE_VT_MSGTYPE_NACK))
563 return -EPERM;
564
565 return 0;
566 }
567
568 /**
569 * Hyper-V variant - just a stub.
570 */
571 static s32 ixgbevf_hv_update_xcast_mode(struct ixgbe_hw *hw, int xcast_mode)
572 {
573 return -EOPNOTSUPP;
574 }
575
576 /**
577 * ixgbevf_set_vfta_vf - Set/Unset VLAN filter table address
578 * @hw: pointer to the HW structure
579 * @vlan: 12 bit VLAN ID
580 * @vind: unused by VF drivers
581 * @vlan_on: if true then set bit, else clear bit
582 **/
583 static s32 ixgbevf_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind,
584 bool vlan_on)
585 {
586 u32 msgbuf[2];
587 s32 err;
588
589 msgbuf[0] = IXGBE_VF_SET_VLAN;
590 msgbuf[1] = vlan;
591 /* Setting the 8 bit field MSG INFO to TRUE indicates "add" */
592 msgbuf[0] |= vlan_on << IXGBE_VT_MSGINFO_SHIFT;
593
594 err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
595 sizeof(msgbuf) / sizeof(u32));
596 if (err)
597 goto mbx_err;
598
599 /* remove extra bits from the message */
600 msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
601 msgbuf[0] &= ~(0xFF << IXGBE_VT_MSGINFO_SHIFT);
602
603 if (msgbuf[0] != (IXGBE_VF_SET_VLAN | IXGBE_VT_MSGTYPE_ACK))
604 err = IXGBE_ERR_INVALID_ARGUMENT;
605
606 mbx_err:
607 return err;
608 }
609
610 /**
611 * Hyper-V variant - just a stub.
612 */
613 static s32 ixgbevf_hv_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind,
614 bool vlan_on)
615 {
616 return -EOPNOTSUPP;
617 }
618
619 /**
620 * ixgbevf_setup_mac_link_vf - Setup MAC link settings
621 * @hw: pointer to hardware structure
622 * @speed: Unused in this implementation
623 * @autoneg: Unused in this implementation
624 * @autoneg_wait_to_complete: Unused in this implementation
625 *
626 * Do nothing and return success. VF drivers are not allowed to change
627 * global settings. Maintained for driver compatibility.
628 **/
629 static s32 ixgbevf_setup_mac_link_vf(struct ixgbe_hw *hw,
630 ixgbe_link_speed speed, bool autoneg,
631 bool autoneg_wait_to_complete)
632 {
633 return 0;
634 }
635
636 /**
637 * ixgbevf_check_mac_link_vf - Get link/speed status
638 * @hw: pointer to hardware structure
639 * @speed: pointer to link speed
640 * @link_up: true is link is up, false otherwise
641 * @autoneg_wait_to_complete: true when waiting for completion is needed
642 *
643 * Reads the links register to determine if link is up and the current speed
644 **/
645 static s32 ixgbevf_check_mac_link_vf(struct ixgbe_hw *hw,
646 ixgbe_link_speed *speed,
647 bool *link_up,
648 bool autoneg_wait_to_complete)
649 {
650 struct ixgbe_mbx_info *mbx = &hw->mbx;
651 struct ixgbe_mac_info *mac = &hw->mac;
652 s32 ret_val = 0;
653 u32 links_reg;
654 u32 in_msg = 0;
655
656 /* If we were hit with a reset drop the link */
657 if (!mbx->ops.check_for_rst(hw) || !mbx->timeout)
658 mac->get_link_status = true;
659
660 if (!mac->get_link_status)
661 goto out;
662
663 /* if link status is down no point in checking to see if pf is up */
664 links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
665 if (!(links_reg & IXGBE_LINKS_UP))
666 goto out;
667
668 /* for SFP+ modules and DA cables on 82599 it can take up to 500usecs
669 * before the link status is correct
670 */
671 if (mac->type == ixgbe_mac_82599_vf) {
672 int i;
673
674 for (i = 0; i < 5; i++) {
675 udelay(100);
676 links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
677
678 if (!(links_reg & IXGBE_LINKS_UP))
679 goto out;
680 }
681 }
682
683 switch (links_reg & IXGBE_LINKS_SPEED_82599) {
684 case IXGBE_LINKS_SPEED_10G_82599:
685 *speed = IXGBE_LINK_SPEED_10GB_FULL;
686 break;
687 case IXGBE_LINKS_SPEED_1G_82599:
688 *speed = IXGBE_LINK_SPEED_1GB_FULL;
689 break;
690 case IXGBE_LINKS_SPEED_100_82599:
691 *speed = IXGBE_LINK_SPEED_100_FULL;
692 break;
693 }
694
695 /* if the read failed it could just be a mailbox collision, best wait
696 * until we are called again and don't report an error
697 */
698 if (mbx->ops.read(hw, &in_msg, 1))
699 goto out;
700
701 if (!(in_msg & IXGBE_VT_MSGTYPE_CTS)) {
702 /* msg is not CTS and is NACK we must have lost CTS status */
703 if (in_msg & IXGBE_VT_MSGTYPE_NACK)
704 ret_val = -1;
705 goto out;
706 }
707
708 /* the pf is talking, if we timed out in the past we reinit */
709 if (!mbx->timeout) {
710 ret_val = -1;
711 goto out;
712 }
713
714 /* if we passed all the tests above then the link is up and we no
715 * longer need to check for link
716 */
717 mac->get_link_status = false;
718
719 out:
720 *link_up = !mac->get_link_status;
721 return ret_val;
722 }
723
724 /**
725 * Hyper-V variant; there is no mailbox communication.
726 */
727 static s32 ixgbevf_hv_check_mac_link_vf(struct ixgbe_hw *hw,
728 ixgbe_link_speed *speed,
729 bool *link_up,
730 bool autoneg_wait_to_complete)
731 {
732 struct ixgbe_mbx_info *mbx = &hw->mbx;
733 struct ixgbe_mac_info *mac = &hw->mac;
734 u32 links_reg;
735
736 /* If we were hit with a reset drop the link */
737 if (!mbx->ops.check_for_rst(hw) || !mbx->timeout)
738 mac->get_link_status = true;
739
740 if (!mac->get_link_status)
741 goto out;
742
743 /* if link status is down no point in checking to see if pf is up */
744 links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
745 if (!(links_reg & IXGBE_LINKS_UP))
746 goto out;
747
748 /* for SFP+ modules and DA cables on 82599 it can take up to 500usecs
749 * before the link status is correct
750 */
751 if (mac->type == ixgbe_mac_82599_vf) {
752 int i;
753
754 for (i = 0; i < 5; i++) {
755 udelay(100);
756 links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
757
758 if (!(links_reg & IXGBE_LINKS_UP))
759 goto out;
760 }
761 }
762
763 switch (links_reg & IXGBE_LINKS_SPEED_82599) {
764 case IXGBE_LINKS_SPEED_10G_82599:
765 *speed = IXGBE_LINK_SPEED_10GB_FULL;
766 break;
767 case IXGBE_LINKS_SPEED_1G_82599:
768 *speed = IXGBE_LINK_SPEED_1GB_FULL;
769 break;
770 case IXGBE_LINKS_SPEED_100_82599:
771 *speed = IXGBE_LINK_SPEED_100_FULL;
772 break;
773 }
774
775 /* if we passed all the tests above then the link is up and we no
776 * longer need to check for link
777 */
778 mac->get_link_status = false;
779
780 out:
781 *link_up = !mac->get_link_status;
782 return 0;
783 }
784
785 /**
786 * ixgbevf_set_rlpml_vf - Set the maximum receive packet length
787 * @hw: pointer to the HW structure
788 * @max_size: value to assign to max frame size
789 **/
790 static s32 ixgbevf_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size)
791 {
792 u32 msgbuf[2];
793 s32 ret_val;
794
795 msgbuf[0] = IXGBE_VF_SET_LPE;
796 msgbuf[1] = max_size;
797
798 ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
799 sizeof(msgbuf) / sizeof(u32));
800 if (ret_val)
801 return ret_val;
802 if ((msgbuf[0] & IXGBE_VF_SET_LPE) &&
803 (msgbuf[0] & IXGBE_VT_MSGTYPE_NACK))
804 return IXGBE_ERR_MBX;
805
806 return 0;
807 }
808
809 /**
810 * ixgbevf_hv_set_rlpml_vf - Set the maximum receive packet length
811 * @hw: pointer to the HW structure
812 * @max_size: value to assign to max frame size
813 * Hyper-V variant.
814 **/
815 static s32 ixgbevf_hv_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size)
816 {
817 u32 reg;
818
819 /* If we are on Hyper-V, we implement this functionality
820 * differently.
821 */
822 reg = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(0));
823 /* CRC == 4 */
824 reg |= ((max_size + 4) | IXGBE_RXDCTL_RLPML_EN);
825 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(0), reg);
826
827 return 0;
828 }
829
830 /**
831 * ixgbevf_negotiate_api_version_vf - Negotiate supported API version
832 * @hw: pointer to the HW structure
833 * @api: integer containing requested API version
834 **/
835 static int ixgbevf_negotiate_api_version_vf(struct ixgbe_hw *hw, int api)
836 {
837 int err;
838 u32 msg[3];
839
840 /* Negotiate the mailbox API version */
841 msg[0] = IXGBE_VF_API_NEGOTIATE;
842 msg[1] = api;
843 msg[2] = 0;
844
845 err = ixgbevf_write_msg_read_ack(hw, msg, msg,
846 sizeof(msg) / sizeof(u32));
847 if (!err) {
848 msg[0] &= ~IXGBE_VT_MSGTYPE_CTS;
849
850 /* Store value and return 0 on success */
851 if (msg[0] == (IXGBE_VF_API_NEGOTIATE | IXGBE_VT_MSGTYPE_ACK)) {
852 hw->api_version = api;
853 return 0;
854 }
855
856 err = IXGBE_ERR_INVALID_ARGUMENT;
857 }
858
859 return err;
860 }
861
862 /**
863 * ixgbevf_hv_negotiate_api_version_vf - Negotiate supported API version
864 * @hw: pointer to the HW structure
865 * @api: integer containing requested API version
866 * Hyper-V version - only ixgbe_mbox_api_10 supported.
867 **/
868 static int ixgbevf_hv_negotiate_api_version_vf(struct ixgbe_hw *hw, int api)
869 {
870 /* Hyper-V only supports api version ixgbe_mbox_api_10 */
871 if (api != ixgbe_mbox_api_10)
872 return IXGBE_ERR_INVALID_ARGUMENT;
873
874 return 0;
875 }
876
877 int ixgbevf_get_queues(struct ixgbe_hw *hw, unsigned int *num_tcs,
878 unsigned int *default_tc)
879 {
880 int err;
881 u32 msg[5];
882
883 /* do nothing if API doesn't support ixgbevf_get_queues */
884 switch (hw->api_version) {
885 case ixgbe_mbox_api_11:
886 case ixgbe_mbox_api_12:
887 break;
888 default:
889 return 0;
890 }
891
892 /* Fetch queue configuration from the PF */
893 msg[0] = IXGBE_VF_GET_QUEUE;
894 msg[1] = msg[2] = msg[3] = msg[4] = 0;
895
896 err = ixgbevf_write_msg_read_ack(hw, msg, msg,
897 sizeof(msg) / sizeof(u32));
898 if (!err) {
899 msg[0] &= ~IXGBE_VT_MSGTYPE_CTS;
900
901 /* if we we didn't get an ACK there must have been
902 * some sort of mailbox error so we should treat it
903 * as such
904 */
905 if (msg[0] != (IXGBE_VF_GET_QUEUE | IXGBE_VT_MSGTYPE_ACK))
906 return IXGBE_ERR_MBX;
907
908 /* record and validate values from message */
909 hw->mac.max_tx_queues = msg[IXGBE_VF_TX_QUEUES];
910 if (hw->mac.max_tx_queues == 0 ||
911 hw->mac.max_tx_queues > IXGBE_VF_MAX_TX_QUEUES)
912 hw->mac.max_tx_queues = IXGBE_VF_MAX_TX_QUEUES;
913
914 hw->mac.max_rx_queues = msg[IXGBE_VF_RX_QUEUES];
915 if (hw->mac.max_rx_queues == 0 ||
916 hw->mac.max_rx_queues > IXGBE_VF_MAX_RX_QUEUES)
917 hw->mac.max_rx_queues = IXGBE_VF_MAX_RX_QUEUES;
918
919 *num_tcs = msg[IXGBE_VF_TRANS_VLAN];
920 /* in case of unknown state assume we cannot tag frames */
921 if (*num_tcs > hw->mac.max_rx_queues)
922 *num_tcs = 1;
923
924 *default_tc = msg[IXGBE_VF_DEF_QUEUE];
925 /* default to queue 0 on out-of-bounds queue number */
926 if (*default_tc >= hw->mac.max_tx_queues)
927 *default_tc = 0;
928 }
929
930 return err;
931 }
932
933 static const struct ixgbe_mac_operations ixgbevf_mac_ops = {
934 .init_hw = ixgbevf_init_hw_vf,
935 .reset_hw = ixgbevf_reset_hw_vf,
936 .start_hw = ixgbevf_start_hw_vf,
937 .get_mac_addr = ixgbevf_get_mac_addr_vf,
938 .stop_adapter = ixgbevf_stop_hw_vf,
939 .setup_link = ixgbevf_setup_mac_link_vf,
940 .check_link = ixgbevf_check_mac_link_vf,
941 .negotiate_api_version = ixgbevf_negotiate_api_version_vf,
942 .set_rar = ixgbevf_set_rar_vf,
943 .update_mc_addr_list = ixgbevf_update_mc_addr_list_vf,
944 .update_xcast_mode = ixgbevf_update_xcast_mode,
945 .set_uc_addr = ixgbevf_set_uc_addr_vf,
946 .set_vfta = ixgbevf_set_vfta_vf,
947 .set_rlpml = ixgbevf_set_rlpml_vf,
948 };
949
950 static const struct ixgbe_mac_operations ixgbevf_hv_mac_ops = {
951 .init_hw = ixgbevf_init_hw_vf,
952 .reset_hw = ixgbevf_hv_reset_hw_vf,
953 .start_hw = ixgbevf_start_hw_vf,
954 .get_mac_addr = ixgbevf_get_mac_addr_vf,
955 .stop_adapter = ixgbevf_stop_hw_vf,
956 .setup_link = ixgbevf_setup_mac_link_vf,
957 .check_link = ixgbevf_hv_check_mac_link_vf,
958 .negotiate_api_version = ixgbevf_hv_negotiate_api_version_vf,
959 .set_rar = ixgbevf_hv_set_rar_vf,
960 .update_mc_addr_list = ixgbevf_hv_update_mc_addr_list_vf,
961 .update_xcast_mode = ixgbevf_hv_update_xcast_mode,
962 .set_uc_addr = ixgbevf_hv_set_uc_addr_vf,
963 .set_vfta = ixgbevf_hv_set_vfta_vf,
964 .set_rlpml = ixgbevf_hv_set_rlpml_vf,
965 };
966
967 const struct ixgbevf_info ixgbevf_82599_vf_info = {
968 .mac = ixgbe_mac_82599_vf,
969 .mac_ops = &ixgbevf_mac_ops,
970 };
971
972 const struct ixgbevf_info ixgbevf_82599_vf_hv_info = {
973 .mac = ixgbe_mac_82599_vf,
974 .mac_ops = &ixgbevf_hv_mac_ops,
975 };
976
977 const struct ixgbevf_info ixgbevf_X540_vf_info = {
978 .mac = ixgbe_mac_X540_vf,
979 .mac_ops = &ixgbevf_mac_ops,
980 };
981
982 const struct ixgbevf_info ixgbevf_X540_vf_hv_info = {
983 .mac = ixgbe_mac_X540_vf,
984 .mac_ops = &ixgbevf_hv_mac_ops,
985 };
986
987 const struct ixgbevf_info ixgbevf_X550_vf_info = {
988 .mac = ixgbe_mac_X550_vf,
989 .mac_ops = &ixgbevf_mac_ops,
990 };
991
992 const struct ixgbevf_info ixgbevf_X550_vf_hv_info = {
993 .mac = ixgbe_mac_X550_vf,
994 .mac_ops = &ixgbevf_hv_mac_ops,
995 };
996
997 const struct ixgbevf_info ixgbevf_X550EM_x_vf_info = {
998 .mac = ixgbe_mac_X550EM_x_vf,
999 .mac_ops = &ixgbevf_mac_ops,
1000 };
1001
1002 const struct ixgbevf_info ixgbevf_X550EM_x_vf_hv_info = {
1003 .mac = ixgbe_mac_X550EM_x_vf,
1004 .mac_ops = &ixgbevf_hv_mac_ops,
1005 };
1006
1007 const struct ixgbevf_info ixgbevf_x550em_a_vf_info = {
1008 .mac = ixgbe_mac_x550em_a_vf,
1009 .mac_ops = &ixgbevf_mac_ops,
1010 };
Linux kernel - Deliverables
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