1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2018, Intel Corporation. */
3
4 #include "ice.h"
5 #include "ice_vf_lib_private.h"
6 #include "ice_base.h"
7 #include "ice_lib.h"
8 #include "ice_fltr.h"
9 #include "ice_dcb_lib.h"
10 #include "ice_flow.h"
11 #include "ice_eswitch.h"
12 #include "ice_virtchnl_allowlist.h"
13 #include "ice_flex_pipe.h"
14 #include "ice_vf_vsi_vlan_ops.h"
15 #include "ice_vlan.h"
16
17 /**
18 * ice_free_vf_entries - Free all VF entries from the hash table
19 * @pf: pointer to the PF structure
20 *
21 * Iterate over the VF hash table, removing and releasing all VF entries.
22 * Called during VF teardown or as cleanup during failed VF initialization.
23 */
ice_free_vf_entries(struct ice_pf * pf)24 static void ice_free_vf_entries(struct ice_pf *pf)
25 {
26 struct ice_vfs *vfs = &pf->vfs;
27 struct hlist_node *tmp;
28 struct ice_vf *vf;
29 unsigned int bkt;
30
31 /* Remove all VFs from the hash table and release their main
32 * reference. Once all references to the VF are dropped, ice_put_vf()
33 * will call ice_release_vf which will remove the VF memory.
34 */
35 lockdep_assert_held(&vfs->table_lock);
36
37 hash_for_each_safe(vfs->table, bkt, tmp, vf, entry) {
38 hash_del_rcu(&vf->entry);
39 ice_put_vf(vf);
40 }
41 }
42
43 /**
44 * ice_free_vf_res - Free a VF's resources
45 * @vf: pointer to the VF info
46 */
ice_free_vf_res(struct ice_vf * vf)47 static void ice_free_vf_res(struct ice_vf *vf)
48 {
49 struct ice_pf *pf = vf->pf;
50 int i, last_vector_idx;
51
52 /* First, disable VF's configuration API to prevent OS from
53 * accessing the VF's VSI after it's freed or invalidated.
54 */
55 clear_bit(ICE_VF_STATE_INIT, vf->vf_states);
56 ice_vf_fdir_exit(vf);
57 /* free VF control VSI */
58 if (vf->ctrl_vsi_idx != ICE_NO_VSI)
59 ice_vf_ctrl_vsi_release(vf);
60
61 /* free VSI and disconnect it from the parent uplink */
62 if (vf->lan_vsi_idx != ICE_NO_VSI) {
63 ice_vf_vsi_release(vf);
64 vf->num_mac = 0;
65 }
66
67 last_vector_idx = vf->first_vector_idx + pf->vfs.num_msix_per - 1;
68
69 /* clear VF MDD event information */
70 memset(&vf->mdd_tx_events, 0, sizeof(vf->mdd_tx_events));
71 memset(&vf->mdd_rx_events, 0, sizeof(vf->mdd_rx_events));
72
73 /* Disable interrupts so that VF starts in a known state */
74 for (i = vf->first_vector_idx; i <= last_vector_idx; i++) {
75 wr32(&pf->hw, GLINT_DYN_CTL(i), GLINT_DYN_CTL_CLEARPBA_M);
76 ice_flush(&pf->hw);
77 }
78 /* reset some of the state variables keeping track of the resources */
79 clear_bit(ICE_VF_STATE_MC_PROMISC, vf->vf_states);
80 clear_bit(ICE_VF_STATE_UC_PROMISC, vf->vf_states);
81 }
82
83 /**
84 * ice_dis_vf_mappings
85 * @vf: pointer to the VF structure
86 */
ice_dis_vf_mappings(struct ice_vf * vf)87 static void ice_dis_vf_mappings(struct ice_vf *vf)
88 {
89 struct ice_pf *pf = vf->pf;
90 struct ice_vsi *vsi;
91 struct device *dev;
92 int first, last, v;
93 struct ice_hw *hw;
94
95 hw = &pf->hw;
96 vsi = ice_get_vf_vsi(vf);
97 if (WARN_ON(!vsi))
98 return;
99
100 dev = ice_pf_to_dev(pf);
101 wr32(hw, VPINT_ALLOC(vf->vf_id), 0);
102 wr32(hw, VPINT_ALLOC_PCI(vf->vf_id), 0);
103
104 first = vf->first_vector_idx;
105 last = first + pf->vfs.num_msix_per - 1;
106 for (v = first; v <= last; v++) {
107 u32 reg;
108
109 reg = (((1 << GLINT_VECT2FUNC_IS_PF_S) &
110 GLINT_VECT2FUNC_IS_PF_M) |
111 ((hw->pf_id << GLINT_VECT2FUNC_PF_NUM_S) &
112 GLINT_VECT2FUNC_PF_NUM_M));
113 wr32(hw, GLINT_VECT2FUNC(v), reg);
114 }
115
116 if (vsi->tx_mapping_mode == ICE_VSI_MAP_CONTIG)
117 wr32(hw, VPLAN_TX_QBASE(vf->vf_id), 0);
118 else
119 dev_err(dev, "Scattered mode for VF Tx queues is not yet implemented\n");
120
121 if (vsi->rx_mapping_mode == ICE_VSI_MAP_CONTIG)
122 wr32(hw, VPLAN_RX_QBASE(vf->vf_id), 0);
123 else
124 dev_err(dev, "Scattered mode for VF Rx queues is not yet implemented\n");
125 }
126
127 /**
128 * ice_sriov_free_msix_res - Reset/free any used MSIX resources
129 * @pf: pointer to the PF structure
130 *
131 * Since no MSIX entries are taken from the pf->irq_tracker then just clear
132 * the pf->sriov_base_vector.
133 *
134 * Returns 0 on success, and -EINVAL on error.
135 */
ice_sriov_free_msix_res(struct ice_pf * pf)136 static int ice_sriov_free_msix_res(struct ice_pf *pf)
137 {
138 if (!pf)
139 return -EINVAL;
140
141 pf->sriov_base_vector = 0;
142
143 return 0;
144 }
145
146 /**
147 * ice_free_vfs - Free all VFs
148 * @pf: pointer to the PF structure
149 */
ice_free_vfs(struct ice_pf * pf)150 void ice_free_vfs(struct ice_pf *pf)
151 {
152 struct device *dev = ice_pf_to_dev(pf);
153 struct ice_vfs *vfs = &pf->vfs;
154 struct ice_hw *hw = &pf->hw;
155 struct ice_vf *vf;
156 unsigned int bkt;
157
158 if (!ice_has_vfs(pf))
159 return;
160
161 while (test_and_set_bit(ICE_VF_DIS, pf->state))
162 usleep_range(1000, 2000);
163
164 /* Disable IOV before freeing resources. This lets any VF drivers
165 * running in the host get themselves cleaned up before we yank
166 * the carpet out from underneath their feet.
167 */
168 if (!pci_vfs_assigned(pf->pdev))
169 pci_disable_sriov(pf->pdev);
170 else
171 dev_warn(dev, "VFs are assigned - not disabling SR-IOV\n");
172
173 mutex_lock(&vfs->table_lock);
174
175 ice_eswitch_release(pf);
176
177 ice_for_each_vf(pf, bkt, vf) {
178 mutex_lock(&vf->cfg_lock);
179
180 ice_dis_vf_qs(vf);
181
182 if (test_bit(ICE_VF_STATE_INIT, vf->vf_states)) {
183 /* disable VF qp mappings and set VF disable state */
184 ice_dis_vf_mappings(vf);
185 set_bit(ICE_VF_STATE_DIS, vf->vf_states);
186 ice_free_vf_res(vf);
187 }
188
189 if (!pci_vfs_assigned(pf->pdev)) {
190 u32 reg_idx, bit_idx;
191
192 reg_idx = (hw->func_caps.vf_base_id + vf->vf_id) / 32;
193 bit_idx = (hw->func_caps.vf_base_id + vf->vf_id) % 32;
194 wr32(hw, GLGEN_VFLRSTAT(reg_idx), BIT(bit_idx));
195 }
196
197 /* clear malicious info since the VF is getting released */
198 list_del(&vf->mbx_info.list_entry);
199
200 mutex_unlock(&vf->cfg_lock);
201 }
202
203 if (ice_sriov_free_msix_res(pf))
204 dev_err(dev, "Failed to free MSIX resources used by SR-IOV\n");
205
206 vfs->num_qps_per = 0;
207 ice_free_vf_entries(pf);
208
209 mutex_unlock(&vfs->table_lock);
210
211 clear_bit(ICE_VF_DIS, pf->state);
212 clear_bit(ICE_FLAG_SRIOV_ENA, pf->flags);
213 }
214
215 /**
216 * ice_vf_vsi_setup - Set up a VF VSI
217 * @vf: VF to setup VSI for
218 *
219 * Returns pointer to the successfully allocated VSI struct on success,
220 * otherwise returns NULL on failure.
221 */
ice_vf_vsi_setup(struct ice_vf * vf)222 static struct ice_vsi *ice_vf_vsi_setup(struct ice_vf *vf)
223 {
224 struct ice_vsi_cfg_params params = {};
225 struct ice_pf *pf = vf->pf;
226 struct ice_vsi *vsi;
227
228 params.type = ICE_VSI_VF;
229 params.pi = ice_vf_get_port_info(vf);
230 params.vf = vf;
231 params.flags = ICE_VSI_FLAG_INIT;
232
233 vsi = ice_vsi_setup(pf, ¶ms);
234
235 if (!vsi) {
236 dev_err(ice_pf_to_dev(pf), "Failed to create VF VSI\n");
237 ice_vf_invalidate_vsi(vf);
238 return NULL;
239 }
240
241 vf->lan_vsi_idx = vsi->idx;
242 vf->lan_vsi_num = vsi->vsi_num;
243
244 return vsi;
245 }
246
247 /**
248 * ice_calc_vf_first_vector_idx - Calculate MSIX vector index in the PF space
249 * @pf: pointer to PF structure
250 * @vf: pointer to VF that the first MSIX vector index is being calculated for
251 *
252 * This returns the first MSIX vector index in PF space that is used by this VF.
253 * This index is used when accessing PF relative registers such as
254 * GLINT_VECT2FUNC and GLINT_DYN_CTL.
255 * This will always be the OICR index in the AVF driver so any functionality
256 * using vf->first_vector_idx for queue configuration will have to increment by
257 * 1 to avoid meddling with the OICR index.
258 */
ice_calc_vf_first_vector_idx(struct ice_pf * pf,struct ice_vf * vf)259 static int ice_calc_vf_first_vector_idx(struct ice_pf *pf, struct ice_vf *vf)
260 {
261 return pf->sriov_base_vector + vf->vf_id * pf->vfs.num_msix_per;
262 }
263
264 /**
265 * ice_ena_vf_msix_mappings - enable VF MSIX mappings in hardware
266 * @vf: VF to enable MSIX mappings for
267 *
268 * Some of the registers need to be indexed/configured using hardware global
269 * device values and other registers need 0-based values, which represent PF
270 * based values.
271 */
ice_ena_vf_msix_mappings(struct ice_vf * vf)272 static void ice_ena_vf_msix_mappings(struct ice_vf *vf)
273 {
274 int device_based_first_msix, device_based_last_msix;
275 int pf_based_first_msix, pf_based_last_msix, v;
276 struct ice_pf *pf = vf->pf;
277 int device_based_vf_id;
278 struct ice_hw *hw;
279 u32 reg;
280
281 hw = &pf->hw;
282 pf_based_first_msix = vf->first_vector_idx;
283 pf_based_last_msix = (pf_based_first_msix + pf->vfs.num_msix_per) - 1;
284
285 device_based_first_msix = pf_based_first_msix +
286 pf->hw.func_caps.common_cap.msix_vector_first_id;
287 device_based_last_msix =
288 (device_based_first_msix + pf->vfs.num_msix_per) - 1;
289 device_based_vf_id = vf->vf_id + hw->func_caps.vf_base_id;
290
291 reg = (((device_based_first_msix << VPINT_ALLOC_FIRST_S) &
292 VPINT_ALLOC_FIRST_M) |
293 ((device_based_last_msix << VPINT_ALLOC_LAST_S) &
294 VPINT_ALLOC_LAST_M) | VPINT_ALLOC_VALID_M);
295 wr32(hw, VPINT_ALLOC(vf->vf_id), reg);
296
297 reg = (((device_based_first_msix << VPINT_ALLOC_PCI_FIRST_S)
298 & VPINT_ALLOC_PCI_FIRST_M) |
299 ((device_based_last_msix << VPINT_ALLOC_PCI_LAST_S) &
300 VPINT_ALLOC_PCI_LAST_M) | VPINT_ALLOC_PCI_VALID_M);
301 wr32(hw, VPINT_ALLOC_PCI(vf->vf_id), reg);
302
303 /* map the interrupts to its functions */
304 for (v = pf_based_first_msix; v <= pf_based_last_msix; v++) {
305 reg = (((device_based_vf_id << GLINT_VECT2FUNC_VF_NUM_S) &
306 GLINT_VECT2FUNC_VF_NUM_M) |
307 ((hw->pf_id << GLINT_VECT2FUNC_PF_NUM_S) &
308 GLINT_VECT2FUNC_PF_NUM_M));
309 wr32(hw, GLINT_VECT2FUNC(v), reg);
310 }
311
312 /* Map mailbox interrupt to VF MSI-X vector 0 */
313 wr32(hw, VPINT_MBX_CTL(device_based_vf_id), VPINT_MBX_CTL_CAUSE_ENA_M);
314 }
315
316 /**
317 * ice_ena_vf_q_mappings - enable Rx/Tx queue mappings for a VF
318 * @vf: VF to enable the mappings for
319 * @max_txq: max Tx queues allowed on the VF's VSI
320 * @max_rxq: max Rx queues allowed on the VF's VSI
321 */
ice_ena_vf_q_mappings(struct ice_vf * vf,u16 max_txq,u16 max_rxq)322 static void ice_ena_vf_q_mappings(struct ice_vf *vf, u16 max_txq, u16 max_rxq)
323 {
324 struct device *dev = ice_pf_to_dev(vf->pf);
325 struct ice_vsi *vsi = ice_get_vf_vsi(vf);
326 struct ice_hw *hw = &vf->pf->hw;
327 u32 reg;
328
329 if (WARN_ON(!vsi))
330 return;
331
332 /* set regardless of mapping mode */
333 wr32(hw, VPLAN_TXQ_MAPENA(vf->vf_id), VPLAN_TXQ_MAPENA_TX_ENA_M);
334
335 /* VF Tx queues allocation */
336 if (vsi->tx_mapping_mode == ICE_VSI_MAP_CONTIG) {
337 /* set the VF PF Tx queue range
338 * VFNUMQ value should be set to (number of queues - 1). A value
339 * of 0 means 1 queue and a value of 255 means 256 queues
340 */
341 reg = (((vsi->txq_map[0] << VPLAN_TX_QBASE_VFFIRSTQ_S) &
342 VPLAN_TX_QBASE_VFFIRSTQ_M) |
343 (((max_txq - 1) << VPLAN_TX_QBASE_VFNUMQ_S) &
344 VPLAN_TX_QBASE_VFNUMQ_M));
345 wr32(hw, VPLAN_TX_QBASE(vf->vf_id), reg);
346 } else {
347 dev_err(dev, "Scattered mode for VF Tx queues is not yet implemented\n");
348 }
349
350 /* set regardless of mapping mode */
351 wr32(hw, VPLAN_RXQ_MAPENA(vf->vf_id), VPLAN_RXQ_MAPENA_RX_ENA_M);
352
353 /* VF Rx queues allocation */
354 if (vsi->rx_mapping_mode == ICE_VSI_MAP_CONTIG) {
355 /* set the VF PF Rx queue range
356 * VFNUMQ value should be set to (number of queues - 1). A value
357 * of 0 means 1 queue and a value of 255 means 256 queues
358 */
359 reg = (((vsi->rxq_map[0] << VPLAN_RX_QBASE_VFFIRSTQ_S) &
360 VPLAN_RX_QBASE_VFFIRSTQ_M) |
361 (((max_rxq - 1) << VPLAN_RX_QBASE_VFNUMQ_S) &
362 VPLAN_RX_QBASE_VFNUMQ_M));
363 wr32(hw, VPLAN_RX_QBASE(vf->vf_id), reg);
364 } else {
365 dev_err(dev, "Scattered mode for VF Rx queues is not yet implemented\n");
366 }
367 }
368
369 /**
370 * ice_ena_vf_mappings - enable VF MSIX and queue mapping
371 * @vf: pointer to the VF structure
372 */
ice_ena_vf_mappings(struct ice_vf * vf)373 static void ice_ena_vf_mappings(struct ice_vf *vf)
374 {
375 struct ice_vsi *vsi = ice_get_vf_vsi(vf);
376
377 if (WARN_ON(!vsi))
378 return;
379
380 ice_ena_vf_msix_mappings(vf);
381 ice_ena_vf_q_mappings(vf, vsi->alloc_txq, vsi->alloc_rxq);
382 }
383
384 /**
385 * ice_calc_vf_reg_idx - Calculate the VF's register index in the PF space
386 * @vf: VF to calculate the register index for
387 * @q_vector: a q_vector associated to the VF
388 */
ice_calc_vf_reg_idx(struct ice_vf * vf,struct ice_q_vector * q_vector)389 int ice_calc_vf_reg_idx(struct ice_vf *vf, struct ice_q_vector *q_vector)
390 {
391 struct ice_pf *pf;
392
393 if (!vf || !q_vector)
394 return -EINVAL;
395
396 pf = vf->pf;
397
398 /* always add one to account for the OICR being the first MSIX */
399 return pf->sriov_base_vector + pf->vfs.num_msix_per * vf->vf_id +
400 q_vector->v_idx + 1;
401 }
402
403 /**
404 * ice_sriov_set_msix_res - Set any used MSIX resources
405 * @pf: pointer to PF structure
406 * @num_msix_needed: number of MSIX vectors needed for all SR-IOV VFs
407 *
408 * This function allows SR-IOV resources to be taken from the end of the PF's
409 * allowed HW MSIX vectors so that the irq_tracker will not be affected. We
410 * just set the pf->sriov_base_vector and return success.
411 *
412 * If there are not enough resources available, return an error. This should
413 * always be caught by ice_set_per_vf_res().
414 *
415 * Return 0 on success, and -EINVAL when there are not enough MSIX vectors
416 * in the PF's space available for SR-IOV.
417 */
ice_sriov_set_msix_res(struct ice_pf * pf,u16 num_msix_needed)418 static int ice_sriov_set_msix_res(struct ice_pf *pf, u16 num_msix_needed)
419 {
420 u16 total_vectors = pf->hw.func_caps.common_cap.num_msix_vectors;
421 int vectors_used = ice_get_max_used_msix_vector(pf);
422 int sriov_base_vector;
423
424 sriov_base_vector = total_vectors - num_msix_needed;
425
426 /* make sure we only grab irq_tracker entries from the list end and
427 * that we have enough available MSIX vectors
428 */
429 if (sriov_base_vector < vectors_used)
430 return -EINVAL;
431
432 pf->sriov_base_vector = sriov_base_vector;
433
434 return 0;
435 }
436
437 /**
438 * ice_set_per_vf_res - check if vectors and queues are available
439 * @pf: pointer to the PF structure
440 * @num_vfs: the number of SR-IOV VFs being configured
441 *
442 * First, determine HW interrupts from common pool. If we allocate fewer VFs, we
443 * get more vectors and can enable more queues per VF. Note that this does not
444 * grab any vectors from the SW pool already allocated. Also note, that all
445 * vector counts include one for each VF's miscellaneous interrupt vector
446 * (i.e. OICR).
447 *
448 * Minimum VFs - 2 vectors, 1 queue pair
449 * Small VFs - 5 vectors, 4 queue pairs
450 * Medium VFs - 17 vectors, 16 queue pairs
451 *
452 * Second, determine number of queue pairs per VF by starting with a pre-defined
453 * maximum each VF supports. If this is not possible, then we adjust based on
454 * queue pairs available on the device.
455 *
456 * Lastly, set queue and MSI-X VF variables tracked by the PF so it can be used
457 * by each VF during VF initialization and reset.
458 */
ice_set_per_vf_res(struct ice_pf * pf,u16 num_vfs)459 static int ice_set_per_vf_res(struct ice_pf *pf, u16 num_vfs)
460 {
461 int vectors_used = ice_get_max_used_msix_vector(pf);
462 u16 num_msix_per_vf, num_txq, num_rxq, avail_qs;
463 int msix_avail_per_vf, msix_avail_for_sriov;
464 struct device *dev = ice_pf_to_dev(pf);
465 int err;
466
467 lockdep_assert_held(&pf->vfs.table_lock);
468
469 if (!num_vfs)
470 return -EINVAL;
471
472 /* determine MSI-X resources per VF */
473 msix_avail_for_sriov = pf->hw.func_caps.common_cap.num_msix_vectors -
474 vectors_used;
475 msix_avail_per_vf = msix_avail_for_sriov / num_vfs;
476 if (msix_avail_per_vf >= ICE_NUM_VF_MSIX_MED) {
477 num_msix_per_vf = ICE_NUM_VF_MSIX_MED;
478 } else if (msix_avail_per_vf >= ICE_NUM_VF_MSIX_SMALL) {
479 num_msix_per_vf = ICE_NUM_VF_MSIX_SMALL;
480 } else if (msix_avail_per_vf >= ICE_NUM_VF_MSIX_MULTIQ_MIN) {
481 num_msix_per_vf = ICE_NUM_VF_MSIX_MULTIQ_MIN;
482 } else if (msix_avail_per_vf >= ICE_MIN_INTR_PER_VF) {
483 num_msix_per_vf = ICE_MIN_INTR_PER_VF;
484 } else {
485 dev_err(dev, "Only %d MSI-X interrupts available for SR-IOV. Not enough to support minimum of %d MSI-X interrupts per VF for %d VFs\n",
486 msix_avail_for_sriov, ICE_MIN_INTR_PER_VF,
487 num_vfs);
488 return -ENOSPC;
489 }
490
491 num_txq = min_t(u16, num_msix_per_vf - ICE_NONQ_VECS_VF,
492 ICE_MAX_RSS_QS_PER_VF);
493 avail_qs = ice_get_avail_txq_count(pf) / num_vfs;
494 if (!avail_qs)
495 num_txq = 0;
496 else if (num_txq > avail_qs)
497 num_txq = rounddown_pow_of_two(avail_qs);
498
499 num_rxq = min_t(u16, num_msix_per_vf - ICE_NONQ_VECS_VF,
500 ICE_MAX_RSS_QS_PER_VF);
501 avail_qs = ice_get_avail_rxq_count(pf) / num_vfs;
502 if (!avail_qs)
503 num_rxq = 0;
504 else if (num_rxq > avail_qs)
505 num_rxq = rounddown_pow_of_two(avail_qs);
506
507 if (num_txq < ICE_MIN_QS_PER_VF || num_rxq < ICE_MIN_QS_PER_VF) {
508 dev_err(dev, "Not enough queues to support minimum of %d queue pairs per VF for %d VFs\n",
509 ICE_MIN_QS_PER_VF, num_vfs);
510 return -ENOSPC;
511 }
512
513 err = ice_sriov_set_msix_res(pf, num_msix_per_vf * num_vfs);
514 if (err) {
515 dev_err(dev, "Unable to set MSI-X resources for %d VFs, err %d\n",
516 num_vfs, err);
517 return err;
518 }
519
520 /* only allow equal Tx/Rx queue count (i.e. queue pairs) */
521 pf->vfs.num_qps_per = min_t(int, num_txq, num_rxq);
522 pf->vfs.num_msix_per = num_msix_per_vf;
523 dev_info(dev, "Enabling %d VFs with %d vectors and %d queues per VF\n",
524 num_vfs, pf->vfs.num_msix_per, pf->vfs.num_qps_per);
525
526 return 0;
527 }
528
529 /**
530 * ice_init_vf_vsi_res - initialize/setup VF VSI resources
531 * @vf: VF to initialize/setup the VSI for
532 *
533 * This function creates a VSI for the VF, adds a VLAN 0 filter, and sets up the
534 * VF VSI's broadcast filter and is only used during initial VF creation.
535 */
ice_init_vf_vsi_res(struct ice_vf * vf)536 static int ice_init_vf_vsi_res(struct ice_vf *vf)
537 {
538 struct ice_pf *pf = vf->pf;
539 struct ice_vsi *vsi;
540 int err;
541
542 vf->first_vector_idx = ice_calc_vf_first_vector_idx(pf, vf);
543
544 vsi = ice_vf_vsi_setup(vf);
545 if (!vsi)
546 return -ENOMEM;
547
548 err = ice_vf_init_host_cfg(vf, vsi);
549 if (err)
550 goto release_vsi;
551
552 return 0;
553
554 release_vsi:
555 ice_vf_vsi_release(vf);
556 return err;
557 }
558
559 /**
560 * ice_start_vfs - start VFs so they are ready to be used by SR-IOV
561 * @pf: PF the VFs are associated with
562 */
ice_start_vfs(struct ice_pf * pf)563 static int ice_start_vfs(struct ice_pf *pf)
564 {
565 struct ice_hw *hw = &pf->hw;
566 unsigned int bkt, it_cnt;
567 struct ice_vf *vf;
568 int retval;
569
570 lockdep_assert_held(&pf->vfs.table_lock);
571
572 it_cnt = 0;
573 ice_for_each_vf(pf, bkt, vf) {
574 vf->vf_ops->clear_reset_trigger(vf);
575
576 retval = ice_init_vf_vsi_res(vf);
577 if (retval) {
578 dev_err(ice_pf_to_dev(pf), "Failed to initialize VSI resources for VF %d, error %d\n",
579 vf->vf_id, retval);
580 goto teardown;
581 }
582
583 set_bit(ICE_VF_STATE_INIT, vf->vf_states);
584 ice_ena_vf_mappings(vf);
585 wr32(hw, VFGEN_RSTAT(vf->vf_id), VIRTCHNL_VFR_VFACTIVE);
586 it_cnt++;
587 }
588
589 ice_flush(hw);
590 return 0;
591
592 teardown:
593 ice_for_each_vf(pf, bkt, vf) {
594 if (it_cnt == 0)
595 break;
596
597 ice_dis_vf_mappings(vf);
598 ice_vf_vsi_release(vf);
599 it_cnt--;
600 }
601
602 return retval;
603 }
604
605 /**
606 * ice_sriov_free_vf - Free VF memory after all references are dropped
607 * @vf: pointer to VF to free
608 *
609 * Called by ice_put_vf through ice_release_vf once the last reference to a VF
610 * structure has been dropped.
611 */
ice_sriov_free_vf(struct ice_vf * vf)612 static void ice_sriov_free_vf(struct ice_vf *vf)
613 {
614 mutex_destroy(&vf->cfg_lock);
615
616 kfree_rcu(vf, rcu);
617 }
618
619 /**
620 * ice_sriov_clear_reset_state - clears VF Reset status register
621 * @vf: the vf to configure
622 */
ice_sriov_clear_reset_state(struct ice_vf * vf)623 static void ice_sriov_clear_reset_state(struct ice_vf *vf)
624 {
625 struct ice_hw *hw = &vf->pf->hw;
626
627 /* Clear the reset status register so that VF immediately sees that
628 * the device is resetting, even if hardware hasn't yet gotten around
629 * to clearing VFGEN_RSTAT for us.
630 */
631 wr32(hw, VFGEN_RSTAT(vf->vf_id), VIRTCHNL_VFR_INPROGRESS);
632 }
633
634 /**
635 * ice_sriov_clear_mbx_register - clears SRIOV VF's mailbox registers
636 * @vf: the vf to configure
637 */
ice_sriov_clear_mbx_register(struct ice_vf * vf)638 static void ice_sriov_clear_mbx_register(struct ice_vf *vf)
639 {
640 struct ice_pf *pf = vf->pf;
641
642 wr32(&pf->hw, VF_MBX_ARQLEN(vf->vf_id), 0);
643 wr32(&pf->hw, VF_MBX_ATQLEN(vf->vf_id), 0);
644 }
645
646 /**
647 * ice_sriov_trigger_reset_register - trigger VF reset for SRIOV VF
648 * @vf: pointer to VF structure
649 * @is_vflr: true if reset occurred due to VFLR
650 *
651 * Trigger and cleanup after a VF reset for a SR-IOV VF.
652 */
ice_sriov_trigger_reset_register(struct ice_vf * vf,bool is_vflr)653 static void ice_sriov_trigger_reset_register(struct ice_vf *vf, bool is_vflr)
654 {
655 struct ice_pf *pf = vf->pf;
656 u32 reg, reg_idx, bit_idx;
657 unsigned int vf_abs_id, i;
658 struct device *dev;
659 struct ice_hw *hw;
660
661 dev = ice_pf_to_dev(pf);
662 hw = &pf->hw;
663 vf_abs_id = vf->vf_id + hw->func_caps.vf_base_id;
664
665 /* In the case of a VFLR, HW has already reset the VF and we just need
666 * to clean up. Otherwise we must first trigger the reset using the
667 * VFRTRIG register.
668 */
669 if (!is_vflr) {
670 reg = rd32(hw, VPGEN_VFRTRIG(vf->vf_id));
671 reg |= VPGEN_VFRTRIG_VFSWR_M;
672 wr32(hw, VPGEN_VFRTRIG(vf->vf_id), reg);
673 }
674
675 /* clear the VFLR bit in GLGEN_VFLRSTAT */
676 reg_idx = (vf_abs_id) / 32;
677 bit_idx = (vf_abs_id) % 32;
678 wr32(hw, GLGEN_VFLRSTAT(reg_idx), BIT(bit_idx));
679 ice_flush(hw);
680
681 wr32(hw, PF_PCI_CIAA,
682 VF_DEVICE_STATUS | (vf_abs_id << PF_PCI_CIAA_VF_NUM_S));
683 for (i = 0; i < ICE_PCI_CIAD_WAIT_COUNT; i++) {
684 reg = rd32(hw, PF_PCI_CIAD);
685 /* no transactions pending so stop polling */
686 if ((reg & VF_TRANS_PENDING_M) == 0)
687 break;
688
689 dev_err(dev, "VF %u PCI transactions stuck\n", vf->vf_id);
690 udelay(ICE_PCI_CIAD_WAIT_DELAY_US);
691 }
692 }
693
694 /**
695 * ice_sriov_poll_reset_status - poll SRIOV VF reset status
696 * @vf: pointer to VF structure
697 *
698 * Returns true when reset is successful, else returns false
699 */
ice_sriov_poll_reset_status(struct ice_vf * vf)700 static bool ice_sriov_poll_reset_status(struct ice_vf *vf)
701 {
702 struct ice_pf *pf = vf->pf;
703 unsigned int i;
704 u32 reg;
705
706 for (i = 0; i < 10; i++) {
707 /* VF reset requires driver to first reset the VF and then
708 * poll the status register to make sure that the reset
709 * completed successfully.
710 */
711 reg = rd32(&pf->hw, VPGEN_VFRSTAT(vf->vf_id));
712 if (reg & VPGEN_VFRSTAT_VFRD_M)
713 return true;
714
715 /* only sleep if the reset is not done */
716 usleep_range(10, 20);
717 }
718 return false;
719 }
720
721 /**
722 * ice_sriov_clear_reset_trigger - enable VF to access hardware
723 * @vf: VF to enabled hardware access for
724 */
ice_sriov_clear_reset_trigger(struct ice_vf * vf)725 static void ice_sriov_clear_reset_trigger(struct ice_vf *vf)
726 {
727 struct ice_hw *hw = &vf->pf->hw;
728 u32 reg;
729
730 reg = rd32(hw, VPGEN_VFRTRIG(vf->vf_id));
731 reg &= ~VPGEN_VFRTRIG_VFSWR_M;
732 wr32(hw, VPGEN_VFRTRIG(vf->vf_id), reg);
733 ice_flush(hw);
734 }
735
736 /**
737 * ice_sriov_create_vsi - Create a new VSI for a VF
738 * @vf: VF to create the VSI for
739 *
740 * This is called by ice_vf_recreate_vsi to create the new VSI after the old
741 * VSI has been released.
742 */
ice_sriov_create_vsi(struct ice_vf * vf)743 static int ice_sriov_create_vsi(struct ice_vf *vf)
744 {
745 struct ice_vsi *vsi;
746
747 vsi = ice_vf_vsi_setup(vf);
748 if (!vsi)
749 return -ENOMEM;
750
751 return 0;
752 }
753
754 /**
755 * ice_sriov_post_vsi_rebuild - tasks to do after the VF's VSI have been rebuilt
756 * @vf: VF to perform tasks on
757 */
ice_sriov_post_vsi_rebuild(struct ice_vf * vf)758 static void ice_sriov_post_vsi_rebuild(struct ice_vf *vf)
759 {
760 ice_ena_vf_mappings(vf);
761 wr32(&vf->pf->hw, VFGEN_RSTAT(vf->vf_id), VIRTCHNL_VFR_VFACTIVE);
762 }
763
764 static const struct ice_vf_ops ice_sriov_vf_ops = {
765 .reset_type = ICE_VF_RESET,
766 .free = ice_sriov_free_vf,
767 .clear_reset_state = ice_sriov_clear_reset_state,
768 .clear_mbx_register = ice_sriov_clear_mbx_register,
769 .trigger_reset_register = ice_sriov_trigger_reset_register,
770 .poll_reset_status = ice_sriov_poll_reset_status,
771 .clear_reset_trigger = ice_sriov_clear_reset_trigger,
772 .irq_close = NULL,
773 .create_vsi = ice_sriov_create_vsi,
774 .post_vsi_rebuild = ice_sriov_post_vsi_rebuild,
775 };
776
777 /**
778 * ice_create_vf_entries - Allocate and insert VF entries
779 * @pf: pointer to the PF structure
780 * @num_vfs: the number of VFs to allocate
781 *
782 * Allocate new VF entries and insert them into the hash table. Set some
783 * basic default fields for initializing the new VFs.
784 *
785 * After this function exits, the hash table will have num_vfs entries
786 * inserted.
787 *
788 * Returns 0 on success or an integer error code on failure.
789 */
ice_create_vf_entries(struct ice_pf * pf,u16 num_vfs)790 static int ice_create_vf_entries(struct ice_pf *pf, u16 num_vfs)
791 {
792 struct ice_vfs *vfs = &pf->vfs;
793 struct ice_vf *vf;
794 u16 vf_id;
795 int err;
796
797 lockdep_assert_held(&vfs->table_lock);
798
799 for (vf_id = 0; vf_id < num_vfs; vf_id++) {
800 vf = kzalloc(sizeof(*vf), GFP_KERNEL);
801 if (!vf) {
802 err = -ENOMEM;
803 goto err_free_entries;
804 }
805 kref_init(&vf->refcnt);
806
807 vf->pf = pf;
808 vf->vf_id = vf_id;
809
810 /* set sriov vf ops for VFs created during SRIOV flow */
811 vf->vf_ops = &ice_sriov_vf_ops;
812
813 ice_initialize_vf_entry(vf);
814
815 vf->vf_sw_id = pf->first_sw;
816
817 hash_add_rcu(vfs->table, &vf->entry, vf_id);
818 }
819
820 return 0;
821
822 err_free_entries:
823 ice_free_vf_entries(pf);
824 return err;
825 }
826
827 /**
828 * ice_ena_vfs - enable VFs so they are ready to be used
829 * @pf: pointer to the PF structure
830 * @num_vfs: number of VFs to enable
831 */
ice_ena_vfs(struct ice_pf * pf,u16 num_vfs)832 static int ice_ena_vfs(struct ice_pf *pf, u16 num_vfs)
833 {
834 struct device *dev = ice_pf_to_dev(pf);
835 struct ice_hw *hw = &pf->hw;
836 int ret;
837
838 /* Disable global interrupt 0 so we don't try to handle the VFLR. */
839 wr32(hw, GLINT_DYN_CTL(pf->oicr_irq.index),
840 ICE_ITR_NONE << GLINT_DYN_CTL_ITR_INDX_S);
841 set_bit(ICE_OICR_INTR_DIS, pf->state);
842 ice_flush(hw);
843
844 ret = pci_enable_sriov(pf->pdev, num_vfs);
845 if (ret)
846 goto err_unroll_intr;
847
848 mutex_lock(&pf->vfs.table_lock);
849
850 ret = ice_set_per_vf_res(pf, num_vfs);
851 if (ret) {
852 dev_err(dev, "Not enough resources for %d VFs, err %d. Try with fewer number of VFs\n",
853 num_vfs, ret);
854 goto err_unroll_sriov;
855 }
856
857 ret = ice_create_vf_entries(pf, num_vfs);
858 if (ret) {
859 dev_err(dev, "Failed to allocate VF entries for %d VFs\n",
860 num_vfs);
861 goto err_unroll_sriov;
862 }
863
864 ret = ice_start_vfs(pf);
865 if (ret) {
866 dev_err(dev, "Failed to start %d VFs, err %d\n", num_vfs, ret);
867 ret = -EAGAIN;
868 goto err_unroll_vf_entries;
869 }
870
871 clear_bit(ICE_VF_DIS, pf->state);
872
873 ret = ice_eswitch_configure(pf);
874 if (ret) {
875 dev_err(dev, "Failed to configure eswitch, err %d\n", ret);
876 goto err_unroll_sriov;
877 }
878
879 /* rearm global interrupts */
880 if (test_and_clear_bit(ICE_OICR_INTR_DIS, pf->state))
881 ice_irq_dynamic_ena(hw, NULL, NULL);
882
883 mutex_unlock(&pf->vfs.table_lock);
884
885 return 0;
886
887 err_unroll_vf_entries:
888 ice_free_vf_entries(pf);
889 err_unroll_sriov:
890 mutex_unlock(&pf->vfs.table_lock);
891 pci_disable_sriov(pf->pdev);
892 err_unroll_intr:
893 /* rearm interrupts here */
894 ice_irq_dynamic_ena(hw, NULL, NULL);
895 clear_bit(ICE_OICR_INTR_DIS, pf->state);
896 return ret;
897 }
898
899 /**
900 * ice_pci_sriov_ena - Enable or change number of VFs
901 * @pf: pointer to the PF structure
902 * @num_vfs: number of VFs to allocate
903 *
904 * Returns 0 on success and negative on failure
905 */
ice_pci_sriov_ena(struct ice_pf * pf,int num_vfs)906 static int ice_pci_sriov_ena(struct ice_pf *pf, int num_vfs)
907 {
908 struct device *dev = ice_pf_to_dev(pf);
909 int err;
910
911 if (!num_vfs) {
912 ice_free_vfs(pf);
913 return 0;
914 }
915
916 if (num_vfs > pf->vfs.num_supported) {
917 dev_err(dev, "Can't enable %d VFs, max VFs supported is %d\n",
918 num_vfs, pf->vfs.num_supported);
919 return -EOPNOTSUPP;
920 }
921
922 dev_info(dev, "Enabling %d VFs\n", num_vfs);
923 err = ice_ena_vfs(pf, num_vfs);
924 if (err) {
925 dev_err(dev, "Failed to enable SR-IOV: %d\n", err);
926 return err;
927 }
928
929 set_bit(ICE_FLAG_SRIOV_ENA, pf->flags);
930 return 0;
931 }
932
933 /**
934 * ice_check_sriov_allowed - check if SR-IOV is allowed based on various checks
935 * @pf: PF to enabled SR-IOV on
936 */
ice_check_sriov_allowed(struct ice_pf * pf)937 static int ice_check_sriov_allowed(struct ice_pf *pf)
938 {
939 struct device *dev = ice_pf_to_dev(pf);
940
941 if (!test_bit(ICE_FLAG_SRIOV_CAPABLE, pf->flags)) {
942 dev_err(dev, "This device is not capable of SR-IOV\n");
943 return -EOPNOTSUPP;
944 }
945
946 if (ice_is_safe_mode(pf)) {
947 dev_err(dev, "SR-IOV cannot be configured - Device is in Safe Mode\n");
948 return -EOPNOTSUPP;
949 }
950
951 if (!ice_pf_state_is_nominal(pf)) {
952 dev_err(dev, "Cannot enable SR-IOV, device not ready\n");
953 return -EBUSY;
954 }
955
956 return 0;
957 }
958
959 /**
960 * ice_sriov_configure - Enable or change number of VFs via sysfs
961 * @pdev: pointer to a pci_dev structure
962 * @num_vfs: number of VFs to allocate or 0 to free VFs
963 *
964 * This function is called when the user updates the number of VFs in sysfs. On
965 * success return whatever num_vfs was set to by the caller. Return negative on
966 * failure.
967 */
ice_sriov_configure(struct pci_dev * pdev,int num_vfs)968 int ice_sriov_configure(struct pci_dev *pdev, int num_vfs)
969 {
970 struct ice_pf *pf = pci_get_drvdata(pdev);
971 struct device *dev = ice_pf_to_dev(pf);
972 int err;
973
974 err = ice_check_sriov_allowed(pf);
975 if (err)
976 return err;
977
978 if (!num_vfs) {
979 if (!pci_vfs_assigned(pdev)) {
980 ice_free_vfs(pf);
981 return 0;
982 }
983
984 dev_err(dev, "can't free VFs because some are assigned to VMs.\n");
985 return -EBUSY;
986 }
987
988 err = ice_pci_sriov_ena(pf, num_vfs);
989 if (err)
990 return err;
991
992 return num_vfs;
993 }
994
995 /**
996 * ice_process_vflr_event - Free VF resources via IRQ calls
997 * @pf: pointer to the PF structure
998 *
999 * called from the VFLR IRQ handler to
1000 * free up VF resources and state variables
1001 */
ice_process_vflr_event(struct ice_pf * pf)1002 void ice_process_vflr_event(struct ice_pf *pf)
1003 {
1004 struct ice_hw *hw = &pf->hw;
1005 struct ice_vf *vf;
1006 unsigned int bkt;
1007 u32 reg;
1008
1009 if (!test_and_clear_bit(ICE_VFLR_EVENT_PENDING, pf->state) ||
1010 !ice_has_vfs(pf))
1011 return;
1012
1013 mutex_lock(&pf->vfs.table_lock);
1014 ice_for_each_vf(pf, bkt, vf) {
1015 u32 reg_idx, bit_idx;
1016
1017 reg_idx = (hw->func_caps.vf_base_id + vf->vf_id) / 32;
1018 bit_idx = (hw->func_caps.vf_base_id + vf->vf_id) % 32;
1019 /* read GLGEN_VFLRSTAT register to find out the flr VFs */
1020 reg = rd32(hw, GLGEN_VFLRSTAT(reg_idx));
1021 if (reg & BIT(bit_idx))
1022 /* GLGEN_VFLRSTAT bit will be cleared in ice_reset_vf */
1023 ice_reset_vf(vf, ICE_VF_RESET_VFLR | ICE_VF_RESET_LOCK);
1024 }
1025 mutex_unlock(&pf->vfs.table_lock);
1026 }
1027
1028 /**
1029 * ice_get_vf_from_pfq - get the VF who owns the PF space queue passed in
1030 * @pf: PF used to index all VFs
1031 * @pfq: queue index relative to the PF's function space
1032 *
1033 * If no VF is found who owns the pfq then return NULL, otherwise return a
1034 * pointer to the VF who owns the pfq
1035 *
1036 * If this function returns non-NULL, it acquires a reference count of the VF
1037 * structure. The caller is responsible for calling ice_put_vf() to drop this
1038 * reference.
1039 */
ice_get_vf_from_pfq(struct ice_pf * pf,u16 pfq)1040 static struct ice_vf *ice_get_vf_from_pfq(struct ice_pf *pf, u16 pfq)
1041 {
1042 struct ice_vf *vf;
1043 unsigned int bkt;
1044
1045 rcu_read_lock();
1046 ice_for_each_vf_rcu(pf, bkt, vf) {
1047 struct ice_vsi *vsi;
1048 u16 rxq_idx;
1049
1050 vsi = ice_get_vf_vsi(vf);
1051 if (!vsi)
1052 continue;
1053
1054 ice_for_each_rxq(vsi, rxq_idx)
1055 if (vsi->rxq_map[rxq_idx] == pfq) {
1056 struct ice_vf *found;
1057
1058 if (kref_get_unless_zero(&vf->refcnt))
1059 found = vf;
1060 else
1061 found = NULL;
1062 rcu_read_unlock();
1063 return found;
1064 }
1065 }
1066 rcu_read_unlock();
1067
1068 return NULL;
1069 }
1070
1071 /**
1072 * ice_globalq_to_pfq - convert from global queue index to PF space queue index
1073 * @pf: PF used for conversion
1074 * @globalq: global queue index used to convert to PF space queue index
1075 */
ice_globalq_to_pfq(struct ice_pf * pf,u32 globalq)1076 static u32 ice_globalq_to_pfq(struct ice_pf *pf, u32 globalq)
1077 {
1078 return globalq - pf->hw.func_caps.common_cap.rxq_first_id;
1079 }
1080
1081 /**
1082 * ice_vf_lan_overflow_event - handle LAN overflow event for a VF
1083 * @pf: PF that the LAN overflow event happened on
1084 * @event: structure holding the event information for the LAN overflow event
1085 *
1086 * Determine if the LAN overflow event was caused by a VF queue. If it was not
1087 * caused by a VF, do nothing. If a VF caused this LAN overflow event trigger a
1088 * reset on the offending VF.
1089 */
1090 void
ice_vf_lan_overflow_event(struct ice_pf * pf,struct ice_rq_event_info * event)1091 ice_vf_lan_overflow_event(struct ice_pf *pf, struct ice_rq_event_info *event)
1092 {
1093 u32 gldcb_rtctq, queue;
1094 struct ice_vf *vf;
1095
1096 gldcb_rtctq = le32_to_cpu(event->desc.params.lan_overflow.prtdcb_ruptq);
1097 dev_dbg(ice_pf_to_dev(pf), "GLDCB_RTCTQ: 0x%08x\n", gldcb_rtctq);
1098
1099 /* event returns device global Rx queue number */
1100 queue = (gldcb_rtctq & GLDCB_RTCTQ_RXQNUM_M) >>
1101 GLDCB_RTCTQ_RXQNUM_S;
1102
1103 vf = ice_get_vf_from_pfq(pf, ice_globalq_to_pfq(pf, queue));
1104 if (!vf)
1105 return;
1106
1107 ice_reset_vf(vf, ICE_VF_RESET_NOTIFY | ICE_VF_RESET_LOCK);
1108 ice_put_vf(vf);
1109 }
1110
1111 /**
1112 * ice_set_vf_spoofchk
1113 * @netdev: network interface device structure
1114 * @vf_id: VF identifier
1115 * @ena: flag to enable or disable feature
1116 *
1117 * Enable or disable VF spoof checking
1118 */
ice_set_vf_spoofchk(struct net_device * netdev,int vf_id,bool ena)1119 int ice_set_vf_spoofchk(struct net_device *netdev, int vf_id, bool ena)
1120 {
1121 struct ice_netdev_priv *np = netdev_priv(netdev);
1122 struct ice_pf *pf = np->vsi->back;
1123 struct ice_vsi *vf_vsi;
1124 struct device *dev;
1125 struct ice_vf *vf;
1126 int ret;
1127
1128 dev = ice_pf_to_dev(pf);
1129
1130 vf = ice_get_vf_by_id(pf, vf_id);
1131 if (!vf)
1132 return -EINVAL;
1133
1134 ret = ice_check_vf_ready_for_cfg(vf);
1135 if (ret)
1136 goto out_put_vf;
1137
1138 vf_vsi = ice_get_vf_vsi(vf);
1139 if (!vf_vsi) {
1140 netdev_err(netdev, "VSI %d for VF %d is null\n",
1141 vf->lan_vsi_idx, vf->vf_id);
1142 ret = -EINVAL;
1143 goto out_put_vf;
1144 }
1145
1146 if (vf_vsi->type != ICE_VSI_VF) {
1147 netdev_err(netdev, "Type %d of VSI %d for VF %d is no ICE_VSI_VF\n",
1148 vf_vsi->type, vf_vsi->vsi_num, vf->vf_id);
1149 ret = -ENODEV;
1150 goto out_put_vf;
1151 }
1152
1153 if (ena == vf->spoofchk) {
1154 dev_dbg(dev, "VF spoofchk already %s\n", ena ? "ON" : "OFF");
1155 ret = 0;
1156 goto out_put_vf;
1157 }
1158
1159 ret = ice_vsi_apply_spoofchk(vf_vsi, ena);
1160 if (ret)
1161 dev_err(dev, "Failed to set spoofchk %s for VF %d VSI %d\n error %d\n",
1162 ena ? "ON" : "OFF", vf->vf_id, vf_vsi->vsi_num, ret);
1163 else
1164 vf->spoofchk = ena;
1165
1166 out_put_vf:
1167 ice_put_vf(vf);
1168 return ret;
1169 }
1170
1171 /**
1172 * ice_get_vf_cfg
1173 * @netdev: network interface device structure
1174 * @vf_id: VF identifier
1175 * @ivi: VF configuration structure
1176 *
1177 * return VF configuration
1178 */
1179 int
ice_get_vf_cfg(struct net_device * netdev,int vf_id,struct ifla_vf_info * ivi)1180 ice_get_vf_cfg(struct net_device *netdev, int vf_id, struct ifla_vf_info *ivi)
1181 {
1182 struct ice_pf *pf = ice_netdev_to_pf(netdev);
1183 struct ice_vf *vf;
1184 int ret;
1185
1186 vf = ice_get_vf_by_id(pf, vf_id);
1187 if (!vf)
1188 return -EINVAL;
1189
1190 ret = ice_check_vf_ready_for_cfg(vf);
1191 if (ret)
1192 goto out_put_vf;
1193
1194 ivi->vf = vf_id;
1195 ether_addr_copy(ivi->mac, vf->hw_lan_addr);
1196
1197 /* VF configuration for VLAN and applicable QoS */
1198 ivi->vlan = ice_vf_get_port_vlan_id(vf);
1199 ivi->qos = ice_vf_get_port_vlan_prio(vf);
1200 if (ice_vf_is_port_vlan_ena(vf))
1201 ivi->vlan_proto = cpu_to_be16(ice_vf_get_port_vlan_tpid(vf));
1202
1203 ivi->trusted = vf->trusted;
1204 ivi->spoofchk = vf->spoofchk;
1205 if (!vf->link_forced)
1206 ivi->linkstate = IFLA_VF_LINK_STATE_AUTO;
1207 else if (vf->link_up)
1208 ivi->linkstate = IFLA_VF_LINK_STATE_ENABLE;
1209 else
1210 ivi->linkstate = IFLA_VF_LINK_STATE_DISABLE;
1211 ivi->max_tx_rate = vf->max_tx_rate;
1212 ivi->min_tx_rate = vf->min_tx_rate;
1213
1214 out_put_vf:
1215 ice_put_vf(vf);
1216 return ret;
1217 }
1218
1219 /**
1220 * ice_set_vf_mac
1221 * @netdev: network interface device structure
1222 * @vf_id: VF identifier
1223 * @mac: MAC address
1224 *
1225 * program VF MAC address
1226 */
ice_set_vf_mac(struct net_device * netdev,int vf_id,u8 * mac)1227 int ice_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac)
1228 {
1229 struct ice_pf *pf = ice_netdev_to_pf(netdev);
1230 struct ice_vf *vf;
1231 int ret;
1232
1233 if (is_multicast_ether_addr(mac)) {
1234 netdev_err(netdev, "%pM not a valid unicast address\n", mac);
1235 return -EINVAL;
1236 }
1237
1238 vf = ice_get_vf_by_id(pf, vf_id);
1239 if (!vf)
1240 return -EINVAL;
1241
1242 /* nothing left to do, unicast MAC already set */
1243 if (ether_addr_equal(vf->dev_lan_addr, mac) &&
1244 ether_addr_equal(vf->hw_lan_addr, mac)) {
1245 ret = 0;
1246 goto out_put_vf;
1247 }
1248
1249 ret = ice_check_vf_ready_for_cfg(vf);
1250 if (ret)
1251 goto out_put_vf;
1252
1253 mutex_lock(&vf->cfg_lock);
1254
1255 /* VF is notified of its new MAC via the PF's response to the
1256 * VIRTCHNL_OP_GET_VF_RESOURCES message after the VF has been reset
1257 */
1258 ether_addr_copy(vf->dev_lan_addr, mac);
1259 ether_addr_copy(vf->hw_lan_addr, mac);
1260 if (is_zero_ether_addr(mac)) {
1261 /* VF will send VIRTCHNL_OP_ADD_ETH_ADDR message with its MAC */
1262 vf->pf_set_mac = false;
1263 netdev_info(netdev, "Removing MAC on VF %d. VF driver will be reinitialized\n",
1264 vf->vf_id);
1265 } else {
1266 /* PF will add MAC rule for the VF */
1267 vf->pf_set_mac = true;
1268 netdev_info(netdev, "Setting MAC %pM on VF %d. VF driver will be reinitialized\n",
1269 mac, vf_id);
1270 }
1271
1272 ice_reset_vf(vf, ICE_VF_RESET_NOTIFY);
1273 mutex_unlock(&vf->cfg_lock);
1274
1275 out_put_vf:
1276 ice_put_vf(vf);
1277 return ret;
1278 }
1279
1280 /**
1281 * ice_set_vf_trust
1282 * @netdev: network interface device structure
1283 * @vf_id: VF identifier
1284 * @trusted: Boolean value to enable/disable trusted VF
1285 *
1286 * Enable or disable a given VF as trusted
1287 */
ice_set_vf_trust(struct net_device * netdev,int vf_id,bool trusted)1288 int ice_set_vf_trust(struct net_device *netdev, int vf_id, bool trusted)
1289 {
1290 struct ice_pf *pf = ice_netdev_to_pf(netdev);
1291 struct ice_vf *vf;
1292 int ret;
1293
1294 vf = ice_get_vf_by_id(pf, vf_id);
1295 if (!vf)
1296 return -EINVAL;
1297
1298 if (ice_is_eswitch_mode_switchdev(pf)) {
1299 dev_info(ice_pf_to_dev(pf), "Trusted VF is forbidden in switchdev mode\n");
1300 return -EOPNOTSUPP;
1301 }
1302
1303 ret = ice_check_vf_ready_for_cfg(vf);
1304 if (ret)
1305 goto out_put_vf;
1306
1307 /* Check if already trusted */
1308 if (trusted == vf->trusted) {
1309 ret = 0;
1310 goto out_put_vf;
1311 }
1312
1313 mutex_lock(&vf->cfg_lock);
1314
1315 vf->trusted = trusted;
1316 ice_reset_vf(vf, ICE_VF_RESET_NOTIFY);
1317 dev_info(ice_pf_to_dev(pf), "VF %u is now %strusted\n",
1318 vf_id, trusted ? "" : "un");
1319
1320 mutex_unlock(&vf->cfg_lock);
1321
1322 out_put_vf:
1323 ice_put_vf(vf);
1324 return ret;
1325 }
1326
1327 /**
1328 * ice_set_vf_link_state
1329 * @netdev: network interface device structure
1330 * @vf_id: VF identifier
1331 * @link_state: required link state
1332 *
1333 * Set VF's link state, irrespective of physical link state status
1334 */
ice_set_vf_link_state(struct net_device * netdev,int vf_id,int link_state)1335 int ice_set_vf_link_state(struct net_device *netdev, int vf_id, int link_state)
1336 {
1337 struct ice_pf *pf = ice_netdev_to_pf(netdev);
1338 struct ice_vf *vf;
1339 int ret;
1340
1341 vf = ice_get_vf_by_id(pf, vf_id);
1342 if (!vf)
1343 return -EINVAL;
1344
1345 ret = ice_check_vf_ready_for_cfg(vf);
1346 if (ret)
1347 goto out_put_vf;
1348
1349 switch (link_state) {
1350 case IFLA_VF_LINK_STATE_AUTO:
1351 vf->link_forced = false;
1352 break;
1353 case IFLA_VF_LINK_STATE_ENABLE:
1354 vf->link_forced = true;
1355 vf->link_up = true;
1356 break;
1357 case IFLA_VF_LINK_STATE_DISABLE:
1358 vf->link_forced = true;
1359 vf->link_up = false;
1360 break;
1361 default:
1362 ret = -EINVAL;
1363 goto out_put_vf;
1364 }
1365
1366 ice_vc_notify_vf_link_state(vf);
1367
1368 out_put_vf:
1369 ice_put_vf(vf);
1370 return ret;
1371 }
1372
1373 /**
1374 * ice_calc_all_vfs_min_tx_rate - calculate cumulative min Tx rate on all VFs
1375 * @pf: PF associated with VFs
1376 */
ice_calc_all_vfs_min_tx_rate(struct ice_pf * pf)1377 static int ice_calc_all_vfs_min_tx_rate(struct ice_pf *pf)
1378 {
1379 struct ice_vf *vf;
1380 unsigned int bkt;
1381 int rate = 0;
1382
1383 rcu_read_lock();
1384 ice_for_each_vf_rcu(pf, bkt, vf)
1385 rate += vf->min_tx_rate;
1386 rcu_read_unlock();
1387
1388 return rate;
1389 }
1390
1391 /**
1392 * ice_min_tx_rate_oversubscribed - check if min Tx rate causes oversubscription
1393 * @vf: VF trying to configure min_tx_rate
1394 * @min_tx_rate: min Tx rate in Mbps
1395 *
1396 * Check if the min_tx_rate being passed in will cause oversubscription of total
1397 * min_tx_rate based on the current link speed and all other VFs configured
1398 * min_tx_rate
1399 *
1400 * Return true if the passed min_tx_rate would cause oversubscription, else
1401 * return false
1402 */
1403 static bool
ice_min_tx_rate_oversubscribed(struct ice_vf * vf,int min_tx_rate)1404 ice_min_tx_rate_oversubscribed(struct ice_vf *vf, int min_tx_rate)
1405 {
1406 struct ice_vsi *vsi = ice_get_vf_vsi(vf);
1407 int all_vfs_min_tx_rate;
1408 int link_speed_mbps;
1409
1410 if (WARN_ON(!vsi))
1411 return false;
1412
1413 link_speed_mbps = ice_get_link_speed_mbps(vsi);
1414 all_vfs_min_tx_rate = ice_calc_all_vfs_min_tx_rate(vf->pf);
1415
1416 /* this VF's previous rate is being overwritten */
1417 all_vfs_min_tx_rate -= vf->min_tx_rate;
1418
1419 if (all_vfs_min_tx_rate + min_tx_rate > link_speed_mbps) {
1420 dev_err(ice_pf_to_dev(vf->pf), "min_tx_rate of %d Mbps on VF %u would cause oversubscription of %d Mbps based on the current link speed %d Mbps\n",
1421 min_tx_rate, vf->vf_id,
1422 all_vfs_min_tx_rate + min_tx_rate - link_speed_mbps,
1423 link_speed_mbps);
1424 return true;
1425 }
1426
1427 return false;
1428 }
1429
1430 /**
1431 * ice_set_vf_bw - set min/max VF bandwidth
1432 * @netdev: network interface device structure
1433 * @vf_id: VF identifier
1434 * @min_tx_rate: Minimum Tx rate in Mbps
1435 * @max_tx_rate: Maximum Tx rate in Mbps
1436 */
1437 int
ice_set_vf_bw(struct net_device * netdev,int vf_id,int min_tx_rate,int max_tx_rate)1438 ice_set_vf_bw(struct net_device *netdev, int vf_id, int min_tx_rate,
1439 int max_tx_rate)
1440 {
1441 struct ice_pf *pf = ice_netdev_to_pf(netdev);
1442 struct ice_vsi *vsi;
1443 struct device *dev;
1444 struct ice_vf *vf;
1445 int ret;
1446
1447 dev = ice_pf_to_dev(pf);
1448
1449 vf = ice_get_vf_by_id(pf, vf_id);
1450 if (!vf)
1451 return -EINVAL;
1452
1453 ret = ice_check_vf_ready_for_cfg(vf);
1454 if (ret)
1455 goto out_put_vf;
1456
1457 vsi = ice_get_vf_vsi(vf);
1458 if (!vsi) {
1459 ret = -EINVAL;
1460 goto out_put_vf;
1461 }
1462
1463 if (min_tx_rate && ice_is_dcb_active(pf)) {
1464 dev_err(dev, "DCB on PF is currently enabled. VF min Tx rate limiting not allowed on this PF.\n");
1465 ret = -EOPNOTSUPP;
1466 goto out_put_vf;
1467 }
1468
1469 if (ice_min_tx_rate_oversubscribed(vf, min_tx_rate)) {
1470 ret = -EINVAL;
1471 goto out_put_vf;
1472 }
1473
1474 if (vf->min_tx_rate != (unsigned int)min_tx_rate) {
1475 ret = ice_set_min_bw_limit(vsi, (u64)min_tx_rate * 1000);
1476 if (ret) {
1477 dev_err(dev, "Unable to set min-tx-rate for VF %d\n",
1478 vf->vf_id);
1479 goto out_put_vf;
1480 }
1481
1482 vf->min_tx_rate = min_tx_rate;
1483 }
1484
1485 if (vf->max_tx_rate != (unsigned int)max_tx_rate) {
1486 ret = ice_set_max_bw_limit(vsi, (u64)max_tx_rate * 1000);
1487 if (ret) {
1488 dev_err(dev, "Unable to set max-tx-rate for VF %d\n",
1489 vf->vf_id);
1490 goto out_put_vf;
1491 }
1492
1493 vf->max_tx_rate = max_tx_rate;
1494 }
1495
1496 out_put_vf:
1497 ice_put_vf(vf);
1498 return ret;
1499 }
1500
1501 /**
1502 * ice_get_vf_stats - populate some stats for the VF
1503 * @netdev: the netdev of the PF
1504 * @vf_id: the host OS identifier (0-255)
1505 * @vf_stats: pointer to the OS memory to be initialized
1506 */
ice_get_vf_stats(struct net_device * netdev,int vf_id,struct ifla_vf_stats * vf_stats)1507 int ice_get_vf_stats(struct net_device *netdev, int vf_id,
1508 struct ifla_vf_stats *vf_stats)
1509 {
1510 struct ice_pf *pf = ice_netdev_to_pf(netdev);
1511 struct ice_eth_stats *stats;
1512 struct ice_vsi *vsi;
1513 struct ice_vf *vf;
1514 int ret;
1515
1516 vf = ice_get_vf_by_id(pf, vf_id);
1517 if (!vf)
1518 return -EINVAL;
1519
1520 ret = ice_check_vf_ready_for_cfg(vf);
1521 if (ret)
1522 goto out_put_vf;
1523
1524 vsi = ice_get_vf_vsi(vf);
1525 if (!vsi) {
1526 ret = -EINVAL;
1527 goto out_put_vf;
1528 }
1529
1530 ice_update_eth_stats(vsi);
1531 stats = &vsi->eth_stats;
1532
1533 memset(vf_stats, 0, sizeof(*vf_stats));
1534
1535 vf_stats->rx_packets = stats->rx_unicast + stats->rx_broadcast +
1536 stats->rx_multicast;
1537 vf_stats->tx_packets = stats->tx_unicast + stats->tx_broadcast +
1538 stats->tx_multicast;
1539 vf_stats->rx_bytes = stats->rx_bytes;
1540 vf_stats->tx_bytes = stats->tx_bytes;
1541 vf_stats->broadcast = stats->rx_broadcast;
1542 vf_stats->multicast = stats->rx_multicast;
1543 vf_stats->rx_dropped = stats->rx_discards;
1544 vf_stats->tx_dropped = stats->tx_discards;
1545
1546 out_put_vf:
1547 ice_put_vf(vf);
1548 return ret;
1549 }
1550
1551 /**
1552 * ice_is_supported_port_vlan_proto - make sure the vlan_proto is supported
1553 * @hw: hardware structure used to check the VLAN mode
1554 * @vlan_proto: VLAN TPID being checked
1555 *
1556 * If the device is configured in Double VLAN Mode (DVM), then both ETH_P_8021Q
1557 * and ETH_P_8021AD are supported. If the device is configured in Single VLAN
1558 * Mode (SVM), then only ETH_P_8021Q is supported.
1559 */
1560 static bool
ice_is_supported_port_vlan_proto(struct ice_hw * hw,u16 vlan_proto)1561 ice_is_supported_port_vlan_proto(struct ice_hw *hw, u16 vlan_proto)
1562 {
1563 bool is_supported = false;
1564
1565 switch (vlan_proto) {
1566 case ETH_P_8021Q:
1567 is_supported = true;
1568 break;
1569 case ETH_P_8021AD:
1570 if (ice_is_dvm_ena(hw))
1571 is_supported = true;
1572 break;
1573 }
1574
1575 return is_supported;
1576 }
1577
1578 /**
1579 * ice_set_vf_port_vlan
1580 * @netdev: network interface device structure
1581 * @vf_id: VF identifier
1582 * @vlan_id: VLAN ID being set
1583 * @qos: priority setting
1584 * @vlan_proto: VLAN protocol
1585 *
1586 * program VF Port VLAN ID and/or QoS
1587 */
1588 int
ice_set_vf_port_vlan(struct net_device * netdev,int vf_id,u16 vlan_id,u8 qos,__be16 vlan_proto)1589 ice_set_vf_port_vlan(struct net_device *netdev, int vf_id, u16 vlan_id, u8 qos,
1590 __be16 vlan_proto)
1591 {
1592 struct ice_pf *pf = ice_netdev_to_pf(netdev);
1593 u16 local_vlan_proto = ntohs(vlan_proto);
1594 struct device *dev;
1595 struct ice_vf *vf;
1596 int ret;
1597
1598 dev = ice_pf_to_dev(pf);
1599
1600 if (vlan_id >= VLAN_N_VID || qos > 7) {
1601 dev_err(dev, "Invalid Port VLAN parameters for VF %d, ID %d, QoS %d\n",
1602 vf_id, vlan_id, qos);
1603 return -EINVAL;
1604 }
1605
1606 if (!ice_is_supported_port_vlan_proto(&pf->hw, local_vlan_proto)) {
1607 dev_err(dev, "VF VLAN protocol 0x%04x is not supported\n",
1608 local_vlan_proto);
1609 return -EPROTONOSUPPORT;
1610 }
1611
1612 vf = ice_get_vf_by_id(pf, vf_id);
1613 if (!vf)
1614 return -EINVAL;
1615
1616 ret = ice_check_vf_ready_for_cfg(vf);
1617 if (ret)
1618 goto out_put_vf;
1619
1620 if (ice_vf_get_port_vlan_prio(vf) == qos &&
1621 ice_vf_get_port_vlan_tpid(vf) == local_vlan_proto &&
1622 ice_vf_get_port_vlan_id(vf) == vlan_id) {
1623 /* duplicate request, so just return success */
1624 dev_dbg(dev, "Duplicate port VLAN %u, QoS %u, TPID 0x%04x request\n",
1625 vlan_id, qos, local_vlan_proto);
1626 ret = 0;
1627 goto out_put_vf;
1628 }
1629
1630 mutex_lock(&vf->cfg_lock);
1631
1632 vf->port_vlan_info = ICE_VLAN(local_vlan_proto, vlan_id, qos);
1633 if (ice_vf_is_port_vlan_ena(vf))
1634 dev_info(dev, "Setting VLAN %u, QoS %u, TPID 0x%04x on VF %d\n",
1635 vlan_id, qos, local_vlan_proto, vf_id);
1636 else
1637 dev_info(dev, "Clearing port VLAN on VF %d\n", vf_id);
1638
1639 ice_reset_vf(vf, ICE_VF_RESET_NOTIFY);
1640 mutex_unlock(&vf->cfg_lock);
1641
1642 out_put_vf:
1643 ice_put_vf(vf);
1644 return ret;
1645 }
1646
1647 /**
1648 * ice_print_vf_rx_mdd_event - print VF Rx malicious driver detect event
1649 * @vf: pointer to the VF structure
1650 */
ice_print_vf_rx_mdd_event(struct ice_vf * vf)1651 void ice_print_vf_rx_mdd_event(struct ice_vf *vf)
1652 {
1653 struct ice_pf *pf = vf->pf;
1654 struct device *dev;
1655
1656 dev = ice_pf_to_dev(pf);
1657
1658 dev_info(dev, "%d Rx Malicious Driver Detection events detected on PF %d VF %d MAC %pM. mdd-auto-reset-vfs=%s\n",
1659 vf->mdd_rx_events.count, pf->hw.pf_id, vf->vf_id,
1660 vf->dev_lan_addr,
1661 test_bit(ICE_FLAG_MDD_AUTO_RESET_VF, pf->flags)
1662 ? "on" : "off");
1663 }
1664
1665 /**
1666 * ice_print_vfs_mdd_events - print VFs malicious driver detect event
1667 * @pf: pointer to the PF structure
1668 *
1669 * Called from ice_handle_mdd_event to rate limit and print VFs MDD events.
1670 */
ice_print_vfs_mdd_events(struct ice_pf * pf)1671 void ice_print_vfs_mdd_events(struct ice_pf *pf)
1672 {
1673 struct device *dev = ice_pf_to_dev(pf);
1674 struct ice_hw *hw = &pf->hw;
1675 struct ice_vf *vf;
1676 unsigned int bkt;
1677
1678 /* check that there are pending MDD events to print */
1679 if (!test_and_clear_bit(ICE_MDD_VF_PRINT_PENDING, pf->state))
1680 return;
1681
1682 /* VF MDD event logs are rate limited to one second intervals */
1683 if (time_is_after_jiffies(pf->vfs.last_printed_mdd_jiffies + HZ * 1))
1684 return;
1685
1686 pf->vfs.last_printed_mdd_jiffies = jiffies;
1687
1688 mutex_lock(&pf->vfs.table_lock);
1689 ice_for_each_vf(pf, bkt, vf) {
1690 /* only print Rx MDD event message if there are new events */
1691 if (vf->mdd_rx_events.count != vf->mdd_rx_events.last_printed) {
1692 vf->mdd_rx_events.last_printed =
1693 vf->mdd_rx_events.count;
1694 ice_print_vf_rx_mdd_event(vf);
1695 }
1696
1697 /* only print Tx MDD event message if there are new events */
1698 if (vf->mdd_tx_events.count != vf->mdd_tx_events.last_printed) {
1699 vf->mdd_tx_events.last_printed =
1700 vf->mdd_tx_events.count;
1701
1702 dev_info(dev, "%d Tx Malicious Driver Detection events detected on PF %d VF %d MAC %pM.\n",
1703 vf->mdd_tx_events.count, hw->pf_id, vf->vf_id,
1704 vf->dev_lan_addr);
1705 }
1706 }
1707 mutex_unlock(&pf->vfs.table_lock);
1708 }
1709
1710 /**
1711 * ice_restore_all_vfs_msi_state - restore VF MSI state after PF FLR
1712 * @pdev: pointer to a pci_dev structure
1713 *
1714 * Called when recovering from a PF FLR to restore interrupt capability to
1715 * the VFs.
1716 */
ice_restore_all_vfs_msi_state(struct pci_dev * pdev)1717 void ice_restore_all_vfs_msi_state(struct pci_dev *pdev)
1718 {
1719 u16 vf_id;
1720 int pos;
1721
1722 if (!pci_num_vf(pdev))
1723 return;
1724
1725 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
1726 if (pos) {
1727 struct pci_dev *vfdev;
1728
1729 pci_read_config_word(pdev, pos + PCI_SRIOV_VF_DID,
1730 &vf_id);
1731 vfdev = pci_get_device(pdev->vendor, vf_id, NULL);
1732 while (vfdev) {
1733 if (vfdev->is_virtfn && vfdev->physfn == pdev)
1734 pci_restore_msi_state(vfdev);
1735 vfdev = pci_get_device(pdev->vendor, vf_id,
1736 vfdev);
1737 }
1738 }
1739 }
1740
