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