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ixgbe: fix sparse warning
[linux-2.6.git] / drivers / net / ixgbe / ixgbe_sriov.c
blobac99b0458fe2f2f6b1e29351465838e696ad9f64
1 /*******************************************************************************
2
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2011 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, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25
26 *******************************************************************************/
27
28 #include <linux/types.h>
29 #include <linux/module.h>
30 #include <linux/pci.h>
31 #include <linux/netdevice.h>
32 #include <linux/vmalloc.h>
33 #include <linux/string.h>
34 #include <linux/in.h>
35 #include <linux/ip.h>
36 #include <linux/tcp.h>
37 #include <linux/ipv6.h>
38 #ifdef NETIF_F_HW_VLAN_TX
39 #include <linux/if_vlan.h>
40 #endif
41
42 #include "ixgbe.h"
43
44 #include "ixgbe_sriov.h"
45
46 static int ixgbe_set_vf_multicasts(struct ixgbe_adapter *adapter,
47 int entries, u16 *hash_list, u32 vf)
48 {
49 struct vf_data_storage *vfinfo = &adapter->vfinfo[vf];
50 struct ixgbe_hw *hw = &adapter->hw;
51 int i;
52 u32 vector_bit;
53 u32 vector_reg;
54 u32 mta_reg;
55
56 /* only so many hash values supported */
57 entries = min(entries, IXGBE_MAX_VF_MC_ENTRIES);
58
59 /*
60 * salt away the number of multi cast addresses assigned
61 * to this VF for later use to restore when the PF multi cast
62 * list changes
63 */
64 vfinfo->num_vf_mc_hashes = entries;
65
66 /*
67 * VFs are limited to using the MTA hash table for their multicast
68 * addresses
69 */
70 for (i = 0; i < entries; i++) {
71 vfinfo->vf_mc_hashes[i] = hash_list[i];
72 }
73
74 for (i = 0; i < vfinfo->num_vf_mc_hashes; i++) {
75 vector_reg = (vfinfo->vf_mc_hashes[i] >> 5) & 0x7F;
76 vector_bit = vfinfo->vf_mc_hashes[i] & 0x1F;
77 mta_reg = IXGBE_READ_REG(hw, IXGBE_MTA(vector_reg));
78 mta_reg |= (1 << vector_bit);
79 IXGBE_WRITE_REG(hw, IXGBE_MTA(vector_reg), mta_reg);
80 }
81
82 return 0;
83 }
84
85 static void ixgbe_restore_vf_macvlans(struct ixgbe_adapter *adapter)
86 {
87 struct ixgbe_hw *hw = &adapter->hw;
88 struct list_head *pos;
89 struct vf_macvlans *entry;
90
91 list_for_each(pos, &adapter->vf_mvs.l) {
92 entry = list_entry(pos, struct vf_macvlans, l);
93 if (entry->free == false)
94 hw->mac.ops.set_rar(hw, entry->rar_entry,
95 entry->vf_macvlan,
96 entry->vf, IXGBE_RAH_AV);
97 }
98 }
99
100 void ixgbe_restore_vf_multicasts(struct ixgbe_adapter *adapter)
101 {
102 struct ixgbe_hw *hw = &adapter->hw;
103 struct vf_data_storage *vfinfo;
104 int i, j;
105 u32 vector_bit;
106 u32 vector_reg;
107 u32 mta_reg;
108
109 for (i = 0; i < adapter->num_vfs; i++) {
110 vfinfo = &adapter->vfinfo[i];
111 for (j = 0; j < vfinfo->num_vf_mc_hashes; j++) {
112 hw->addr_ctrl.mta_in_use++;
113 vector_reg = (vfinfo->vf_mc_hashes[j] >> 5) & 0x7F;
114 vector_bit = vfinfo->vf_mc_hashes[j] & 0x1F;
115 mta_reg = IXGBE_READ_REG(hw, IXGBE_MTA(vector_reg));
116 mta_reg |= (1 << vector_bit);
117 IXGBE_WRITE_REG(hw, IXGBE_MTA(vector_reg), mta_reg);
118 }
119 }
120
121 /* Restore any VF macvlans */
122 ixgbe_restore_vf_macvlans(adapter);
123 }
124
125 static int ixgbe_set_vf_vlan(struct ixgbe_adapter *adapter, int add, int vid,
126 u32 vf)
127 {
128 return adapter->hw.mac.ops.set_vfta(&adapter->hw, vid, vf, (bool)add);
129 }
130
131 static void ixgbe_set_vf_lpe(struct ixgbe_adapter *adapter, u32 *msgbuf)
132 {
133 struct ixgbe_hw *hw = &adapter->hw;
134 int new_mtu = msgbuf[1];
135 u32 max_frs;
136 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
137
138 /* Only X540 supports jumbo frames in IOV mode */
139 if (adapter->hw.mac.type != ixgbe_mac_X540)
140 return;
141
142 /* MTU < 68 is an error and causes problems on some kernels */
143 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE)) {
144 e_err(drv, "VF mtu %d out of range\n", new_mtu);
145 return;
146 }
147
148 max_frs = (IXGBE_READ_REG(hw, IXGBE_MAXFRS) &
149 IXGBE_MHADD_MFS_MASK) >> IXGBE_MHADD_MFS_SHIFT;
150 if (max_frs < new_mtu) {
151 max_frs = new_mtu << IXGBE_MHADD_MFS_SHIFT;
152 IXGBE_WRITE_REG(hw, IXGBE_MAXFRS, max_frs);
153 }
154
155 e_info(hw, "VF requests change max MTU to %d\n", new_mtu);
156 }
157
158 static void ixgbe_set_vmolr(struct ixgbe_hw *hw, u32 vf, bool aupe)
159 {
160 u32 vmolr = IXGBE_READ_REG(hw, IXGBE_VMOLR(vf));
161 vmolr |= (IXGBE_VMOLR_ROMPE |
162 IXGBE_VMOLR_BAM);
163 if (aupe)
164 vmolr |= IXGBE_VMOLR_AUPE;
165 else
166 vmolr &= ~IXGBE_VMOLR_AUPE;
167 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(vf), vmolr);
168 }
169
170 static void ixgbe_set_vmvir(struct ixgbe_adapter *adapter, u32 vid, u32 vf)
171 {
172 struct ixgbe_hw *hw = &adapter->hw;
173
174 if (vid)
175 IXGBE_WRITE_REG(hw, IXGBE_VMVIR(vf),
176 (vid | IXGBE_VMVIR_VLANA_DEFAULT));
177 else
178 IXGBE_WRITE_REG(hw, IXGBE_VMVIR(vf), 0);
179 }
180
181 static inline void ixgbe_vf_reset_event(struct ixgbe_adapter *adapter, u32 vf)
182 {
183 struct ixgbe_hw *hw = &adapter->hw;
184 int rar_entry = hw->mac.num_rar_entries - (vf + 1);
185
186 /* reset offloads to defaults */
187 if (adapter->vfinfo[vf].pf_vlan) {
188 ixgbe_set_vf_vlan(adapter, true,
189 adapter->vfinfo[vf].pf_vlan, vf);
190 ixgbe_set_vmvir(adapter,
191 (adapter->vfinfo[vf].pf_vlan |
192 (adapter->vfinfo[vf].pf_qos <<
193 VLAN_PRIO_SHIFT)), vf);
194 ixgbe_set_vmolr(hw, vf, false);
195 } else {
196 ixgbe_set_vmvir(adapter, 0, vf);
197 ixgbe_set_vmolr(hw, vf, true);
198 }
199
200 /* reset multicast table array for vf */
201 adapter->vfinfo[vf].num_vf_mc_hashes = 0;
202
203 /* Flush and reset the mta with the new values */
204 ixgbe_set_rx_mode(adapter->netdev);
205
206 hw->mac.ops.clear_rar(hw, rar_entry);
207 }
208
209 static int ixgbe_set_vf_mac(struct ixgbe_adapter *adapter,
210 int vf, unsigned char *mac_addr)
211 {
212 struct ixgbe_hw *hw = &adapter->hw;
213 int rar_entry = hw->mac.num_rar_entries - (vf + 1);
214
215 memcpy(adapter->vfinfo[vf].vf_mac_addresses, mac_addr, 6);
216 hw->mac.ops.set_rar(hw, rar_entry, mac_addr, vf, IXGBE_RAH_AV);
217
218 return 0;
219 }
220
221 static int ixgbe_set_vf_macvlan(struct ixgbe_adapter *adapter,
222 int vf, int index, unsigned char *mac_addr)
223 {
224 struct ixgbe_hw *hw = &adapter->hw;
225 struct list_head *pos;
226 struct vf_macvlans *entry;
227
228 if (index <= 1) {
229 list_for_each(pos, &adapter->vf_mvs.l) {
230 entry = list_entry(pos, struct vf_macvlans, l);
231 if (entry->vf == vf) {
232 entry->vf = -1;
233 entry->free = true;
234 entry->is_macvlan = false;
235 hw->mac.ops.clear_rar(hw, entry->rar_entry);
236 }
237 }
238 }
239
240 /*
241 * If index was zero then we were asked to clear the uc list
242 * for the VF. We're done.
243 */
244 if (!index)
245 return 0;
246
247 entry = NULL;
248
249 list_for_each(pos, &adapter->vf_mvs.l) {
250 entry = list_entry(pos, struct vf_macvlans, l);
251 if (entry->free)
252 break;
253 }
254
255 /*
256 * If we traversed the entire list and didn't find a free entry
257 * then we're out of space on the RAR table. Also entry may
258 * be NULL because the original memory allocation for the list
259 * failed, which is not fatal but does mean we can't support
260 * VF requests for MACVLAN because we couldn't allocate
261 * memory for the list management required.
262 */
263 if (!entry || !entry->free)
264 return -ENOSPC;
265
266 entry->free = false;
267 entry->is_macvlan = true;
268 entry->vf = vf;
269 memcpy(entry->vf_macvlan, mac_addr, ETH_ALEN);
270
271 hw->mac.ops.set_rar(hw, entry->rar_entry, mac_addr, vf, IXGBE_RAH_AV);
272
273 return 0;
274 }
275
276 int ixgbe_vf_configuration(struct pci_dev *pdev, unsigned int event_mask)
277 {
278 unsigned char vf_mac_addr[6];
279 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
280 unsigned int vfn = (event_mask & 0x3f);
281
282 bool enable = ((event_mask & 0x10000000U) != 0);
283
284 if (enable) {
285 random_ether_addr(vf_mac_addr);
286 e_info(probe, "IOV: VF %d is enabled MAC %pM\n",
287 vfn, vf_mac_addr);
288 /*
289 * Store away the VF "permananet" MAC address, it will ask
290 * for it later.
291 */
292 memcpy(adapter->vfinfo[vfn].vf_mac_addresses, vf_mac_addr, 6);
293 }
294
295 return 0;
296 }
297
298 static inline void ixgbe_vf_reset_msg(struct ixgbe_adapter *adapter, u32 vf)
299 {
300 struct ixgbe_hw *hw = &adapter->hw;
301 u32 reg;
302 u32 reg_offset, vf_shift;
303
304 vf_shift = vf % 32;
305 reg_offset = vf / 32;
306
307 /* enable transmit and receive for vf */
308 reg = IXGBE_READ_REG(hw, IXGBE_VFTE(reg_offset));
309 reg |= (reg | (1 << vf_shift));
310 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), reg);
311
312 reg = IXGBE_READ_REG(hw, IXGBE_VFRE(reg_offset));
313 reg |= (reg | (1 << vf_shift));
314 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), reg);
315
316 /* Enable counting of spoofed packets in the SSVPC register */
317 reg = IXGBE_READ_REG(hw, IXGBE_VMECM(reg_offset));
318 reg |= (1 << vf_shift);
319 IXGBE_WRITE_REG(hw, IXGBE_VMECM(reg_offset), reg);
320
321 ixgbe_vf_reset_event(adapter, vf);
322 }
323
324 static int ixgbe_rcv_msg_from_vf(struct ixgbe_adapter *adapter, u32 vf)
325 {
326 u32 mbx_size = IXGBE_VFMAILBOX_SIZE;
327 u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
328 struct ixgbe_hw *hw = &adapter->hw;
329 s32 retval;
330 int entries;
331 u16 *hash_list;
332 int add, vid, index;
333 u8 *new_mac;
334
335 retval = ixgbe_read_mbx(hw, msgbuf, mbx_size, vf);
336
337 if (retval)
338 pr_err("Error receiving message from VF\n");
339
340 /* this is a message we already processed, do nothing */
341 if (msgbuf[0] & (IXGBE_VT_MSGTYPE_ACK | IXGBE_VT_MSGTYPE_NACK))
342 return retval;
343
344 /*
345 * until the vf completes a virtual function reset it should not be
346 * allowed to start any configuration.
347 */
348
349 if (msgbuf[0] == IXGBE_VF_RESET) {
350 unsigned char *vf_mac = adapter->vfinfo[vf].vf_mac_addresses;
351 new_mac = (u8 *)(&msgbuf[1]);
352 e_info(probe, "VF Reset msg received from vf %d\n", vf);
353 adapter->vfinfo[vf].clear_to_send = false;
354 ixgbe_vf_reset_msg(adapter, vf);
355 adapter->vfinfo[vf].clear_to_send = true;
356
357 if (is_valid_ether_addr(new_mac) &&
358 !adapter->vfinfo[vf].pf_set_mac)
359 ixgbe_set_vf_mac(adapter, vf, vf_mac);
360 else
361 ixgbe_set_vf_mac(adapter,
362 vf, adapter->vfinfo[vf].vf_mac_addresses);
363
364 /* reply to reset with ack and vf mac address */
365 msgbuf[0] = IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK;
366 memcpy(new_mac, vf_mac, IXGBE_ETH_LENGTH_OF_ADDRESS);
367 /*
368 * Piggyback the multicast filter type so VF can compute the
369 * correct vectors
370 */
371 msgbuf[3] = hw->mac.mc_filter_type;
372 ixgbe_write_mbx(hw, msgbuf, IXGBE_VF_PERMADDR_MSG_LEN, vf);
373
374 return retval;
375 }
376
377 if (!adapter->vfinfo[vf].clear_to_send) {
378 msgbuf[0] |= IXGBE_VT_MSGTYPE_NACK;
379 ixgbe_write_mbx(hw, msgbuf, 1, vf);
380 return retval;
381 }
382
383 switch ((msgbuf[0] & 0xFFFF)) {
384 case IXGBE_VF_SET_MAC_ADDR:
385 new_mac = ((u8 *)(&msgbuf[1]));
386 if (is_valid_ether_addr(new_mac) &&
387 !adapter->vfinfo[vf].pf_set_mac) {
388 ixgbe_set_vf_mac(adapter, vf, new_mac);
389 } else if (memcmp(adapter->vfinfo[vf].vf_mac_addresses,
390 new_mac, ETH_ALEN)) {
391 e_warn(drv, "VF %d attempted to override "
392 "administratively set MAC address\nReload "
393 "the VF driver to resume operations\n", vf);
394 retval = -1;
395 }
396 break;
397 case IXGBE_VF_SET_MULTICAST:
398 entries = (msgbuf[0] & IXGBE_VT_MSGINFO_MASK)
399 >> IXGBE_VT_MSGINFO_SHIFT;
400 hash_list = (u16 *)&msgbuf[1];
401 retval = ixgbe_set_vf_multicasts(adapter, entries,
402 hash_list, vf);
403 break;
404 case IXGBE_VF_SET_LPE:
405 ixgbe_set_vf_lpe(adapter, msgbuf);
406 break;
407 case IXGBE_VF_SET_VLAN:
408 add = (msgbuf[0] & IXGBE_VT_MSGINFO_MASK)
409 >> IXGBE_VT_MSGINFO_SHIFT;
410 vid = (msgbuf[1] & IXGBE_VLVF_VLANID_MASK);
411 if (adapter->vfinfo[vf].pf_vlan) {
412 e_warn(drv, "VF %d attempted to override "
413 "administratively set VLAN configuration\n"
414 "Reload the VF driver to resume operations\n",
415 vf);
416 retval = -1;
417 } else {
418 retval = ixgbe_set_vf_vlan(adapter, add, vid, vf);
419 }
420 break;
421 case IXGBE_VF_SET_MACVLAN:
422 index = (msgbuf[0] & IXGBE_VT_MSGINFO_MASK) >>
423 IXGBE_VT_MSGINFO_SHIFT;
424 /*
425 * If the VF is allowed to set MAC filters then turn off
426 * anti-spoofing to avoid false positives. An index
427 * greater than 0 will indicate the VF is setting a
428 * macvlan MAC filter.
429 */
430 if (index > 0 && adapter->antispoofing_enabled) {
431 hw->mac.ops.set_mac_anti_spoofing(hw, false,
432 adapter->num_vfs);
433 hw->mac.ops.set_vlan_anti_spoofing(hw, false, vf);
434 adapter->antispoofing_enabled = false;
435 }
436 retval = ixgbe_set_vf_macvlan(adapter, vf, index,
437 (unsigned char *)(&msgbuf[1]));
438 break;
439 default:
440 e_err(drv, "Unhandled Msg %8.8x\n", msgbuf[0]);
441 retval = IXGBE_ERR_MBX;
442 break;
443 }
444
445 /* notify the VF of the results of what it sent us */
446 if (retval)
447 msgbuf[0] |= IXGBE_VT_MSGTYPE_NACK;
448 else
449 msgbuf[0] |= IXGBE_VT_MSGTYPE_ACK;
450
451 msgbuf[0] |= IXGBE_VT_MSGTYPE_CTS;
452
453 ixgbe_write_mbx(hw, msgbuf, 1, vf);
454
455 return retval;
456 }
457
458 static void ixgbe_rcv_ack_from_vf(struct ixgbe_adapter *adapter, u32 vf)
459 {
460 struct ixgbe_hw *hw = &adapter->hw;
461 u32 msg = IXGBE_VT_MSGTYPE_NACK;
462
463 /* if device isn't clear to send it shouldn't be reading either */
464 if (!adapter->vfinfo[vf].clear_to_send)
465 ixgbe_write_mbx(hw, &msg, 1, vf);
466 }
467
468 void ixgbe_msg_task(struct ixgbe_adapter *adapter)
469 {
470 struct ixgbe_hw *hw = &adapter->hw;
471 u32 vf;
472
473 for (vf = 0; vf < adapter->num_vfs; vf++) {
474 /* process any reset requests */
475 if (!ixgbe_check_for_rst(hw, vf))
476 ixgbe_vf_reset_event(adapter, vf);
477
478 /* process any messages pending */
479 if (!ixgbe_check_for_msg(hw, vf))
480 ixgbe_rcv_msg_from_vf(adapter, vf);
481
482 /* process any acks */
483 if (!ixgbe_check_for_ack(hw, vf))
484 ixgbe_rcv_ack_from_vf(adapter, vf);
485 }
486 }
487
488 void ixgbe_disable_tx_rx(struct ixgbe_adapter *adapter)
489 {
490 struct ixgbe_hw *hw = &adapter->hw;
491
492 /* disable transmit and receive for all vfs */
493 IXGBE_WRITE_REG(hw, IXGBE_VFTE(0), 0);
494 IXGBE_WRITE_REG(hw, IXGBE_VFTE(1), 0);
495
496 IXGBE_WRITE_REG(hw, IXGBE_VFRE(0), 0);
497 IXGBE_WRITE_REG(hw, IXGBE_VFRE(1), 0);
498 }
499
500 void ixgbe_ping_all_vfs(struct ixgbe_adapter *adapter)
501 {
502 struct ixgbe_hw *hw = &adapter->hw;
503 u32 ping;
504 int i;
505
506 for (i = 0 ; i < adapter->num_vfs; i++) {
507 ping = IXGBE_PF_CONTROL_MSG;
508 if (adapter->vfinfo[i].clear_to_send)
509 ping |= IXGBE_VT_MSGTYPE_CTS;
510 ixgbe_write_mbx(hw, &ping, 1, i);
511 }
512 }
513
514 int ixgbe_ndo_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
515 {
516 struct ixgbe_adapter *adapter = netdev_priv(netdev);
517 if (!is_valid_ether_addr(mac) || (vf >= adapter->num_vfs))
518 return -EINVAL;
519 adapter->vfinfo[vf].pf_set_mac = true;
520 dev_info(&adapter->pdev->dev, "setting MAC %pM on VF %d\n", mac, vf);
521 dev_info(&adapter->pdev->dev, "Reload the VF driver to make this"
522 " change effective.");
523 if (test_bit(__IXGBE_DOWN, &adapter->state)) {
524 dev_warn(&adapter->pdev->dev, "The VF MAC address has been set,"
525 " but the PF device is not up.\n");
526 dev_warn(&adapter->pdev->dev, "Bring the PF device up before"
527 " attempting to use the VF device.\n");
528 }
529 return ixgbe_set_vf_mac(adapter, vf, mac);
530 }
531
532 int ixgbe_ndo_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan, u8 qos)
533 {
534 int err = 0;
535 struct ixgbe_adapter *adapter = netdev_priv(netdev);
536 struct ixgbe_hw *hw = &adapter->hw;
537
538 if ((vf >= adapter->num_vfs) || (vlan > 4095) || (qos > 7))
539 return -EINVAL;
540 if (vlan || qos) {
541 err = ixgbe_set_vf_vlan(adapter, true, vlan, vf);
542 if (err)
543 goto out;
544 ixgbe_set_vmvir(adapter, vlan | (qos << VLAN_PRIO_SHIFT), vf);
545 ixgbe_set_vmolr(hw, vf, false);
546 if (adapter->antispoofing_enabled)
547 hw->mac.ops.set_vlan_anti_spoofing(hw, true, vf);
548 adapter->vfinfo[vf].pf_vlan = vlan;
549 adapter->vfinfo[vf].pf_qos = qos;
550 dev_info(&adapter->pdev->dev,
551 "Setting VLAN %d, QOS 0x%x on VF %d\n", vlan, qos, vf);
552 if (test_bit(__IXGBE_DOWN, &adapter->state)) {
553 dev_warn(&adapter->pdev->dev,
554 "The VF VLAN has been set,"
555 " but the PF device is not up.\n");
556 dev_warn(&adapter->pdev->dev,
557 "Bring the PF device up before"
558 " attempting to use the VF device.\n");
559 }
560 } else {
561 err = ixgbe_set_vf_vlan(adapter, false,
562 adapter->vfinfo[vf].pf_vlan, vf);
563 ixgbe_set_vmvir(adapter, vlan, vf);
564 ixgbe_set_vmolr(hw, vf, true);
565 hw->mac.ops.set_vlan_anti_spoofing(hw, false, vf);
566 adapter->vfinfo[vf].pf_vlan = 0;
567 adapter->vfinfo[vf].pf_qos = 0;
568 }
569 out:
570 return err;
571 }
572
573 static int ixgbe_link_mbps(int internal_link_speed)
574 {
575 switch (internal_link_speed) {
576 case IXGBE_LINK_SPEED_100_FULL:
577 return 100;
578 case IXGBE_LINK_SPEED_1GB_FULL:
579 return 1000;
580 case IXGBE_LINK_SPEED_10GB_FULL:
581 return 10000;
582 default:
583 return 0;
584 }
585 }
586
587 static void ixgbe_set_vf_rate_limit(struct ixgbe_hw *hw, int vf, int tx_rate,
588 int link_speed)
589 {
590 int rf_dec, rf_int;
591 u32 bcnrc_val;
592
593 if (tx_rate != 0) {
594 /* Calculate the rate factor values to set */
595 rf_int = link_speed / tx_rate;
596 rf_dec = (link_speed - (rf_int * tx_rate));
597 rf_dec = (rf_dec * (1<<IXGBE_RTTBCNRC_RF_INT_SHIFT)) / tx_rate;
598
599 bcnrc_val = IXGBE_RTTBCNRC_RS_ENA;
600 bcnrc_val |= ((rf_int<<IXGBE_RTTBCNRC_RF_INT_SHIFT) &
601 IXGBE_RTTBCNRC_RF_INT_MASK);
602 bcnrc_val |= (rf_dec & IXGBE_RTTBCNRC_RF_DEC_MASK);
603 } else {
604 bcnrc_val = 0;
605 }
606
607 IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, 2*vf); /* vf Y uses queue 2*Y */
608 IXGBE_WRITE_REG(hw, IXGBE_RTTBCNRC, bcnrc_val);
609 }
610
611 void ixgbe_check_vf_rate_limit(struct ixgbe_adapter *adapter)
612 {
613 int actual_link_speed, i;
614 bool reset_rate = false;
615
616 /* VF Tx rate limit was not set */
617 if (adapter->vf_rate_link_speed == 0)
618 return;
619
620 actual_link_speed = ixgbe_link_mbps(adapter->link_speed);
621 if (actual_link_speed != adapter->vf_rate_link_speed) {
622 reset_rate = true;
623 adapter->vf_rate_link_speed = 0;
624 dev_info(&adapter->pdev->dev,
625 "Link speed has been changed. VF Transmit rate "
626 "is disabled\n");
627 }
628
629 for (i = 0; i < adapter->num_vfs; i++) {
630 if (reset_rate)
631 adapter->vfinfo[i].tx_rate = 0;
632
633 ixgbe_set_vf_rate_limit(&adapter->hw, i,
634 adapter->vfinfo[i].tx_rate,
635 actual_link_speed);
636 }
637 }
638
639 int ixgbe_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate)
640 {
641 struct ixgbe_adapter *adapter = netdev_priv(netdev);
642 struct ixgbe_hw *hw = &adapter->hw;
643 int actual_link_speed;
644
645 actual_link_speed = ixgbe_link_mbps(adapter->link_speed);
646 if ((vf >= adapter->num_vfs) || (!adapter->link_up) ||
647 (tx_rate > actual_link_speed) || (actual_link_speed != 10000) ||
648 ((tx_rate != 0) && (tx_rate <= 10)))
649 /* rate limit cannot be set to 10Mb or less in 10Gb adapters */
650 return -EINVAL;
651
652 adapter->vf_rate_link_speed = actual_link_speed;
653 adapter->vfinfo[vf].tx_rate = (u16)tx_rate;
654 ixgbe_set_vf_rate_limit(hw, vf, tx_rate, actual_link_speed);
655
656 return 0;
657 }
658
659 int ixgbe_ndo_get_vf_config(struct net_device *netdev,
660 int vf, struct ifla_vf_info *ivi)
661 {
662 struct ixgbe_adapter *adapter = netdev_priv(netdev);
663 if (vf >= adapter->num_vfs)
664 return -EINVAL;
665 ivi->vf = vf;
666 memcpy(&ivi->mac, adapter->vfinfo[vf].vf_mac_addresses, ETH_ALEN);
667 ivi->tx_rate = adapter->vfinfo[vf].tx_rate;
668 ivi->vlan = adapter->vfinfo[vf].pf_vlan;
669 ivi->qos = adapter->vfinfo[vf].pf_qos;
670 return 0;
671 }
Linus' kernel tree