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1// SPDX-License-Identifier: GPL-2.02/* 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 table19 * @pf: pointer to the PF structure20 *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 */24static 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 main32 * 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 resources45 * @vf: pointer to the VF info46 */47static 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 from53 * 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 + vf->num_msix - 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_mappings85 * @vf: pointer to the VF structure86 */87static 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 + vf->num_msix - 1;106 for (v = first; v <= last; v++) {107 u32 reg;108 109 reg = FIELD_PREP(GLINT_VECT2FUNC_IS_PF_M, 1) |110 FIELD_PREP(GLINT_VECT2FUNC_PF_NUM_M, hw->pf_id);111 wr32(hw, GLINT_VECT2FUNC(v), reg);112 }113 114 if (vsi->tx_mapping_mode == ICE_VSI_MAP_CONTIG)115 wr32(hw, VPLAN_TX_QBASE(vf->vf_id), 0);116 else117 dev_err(dev, "Scattered mode for VF Tx queues is not yet implemented\n");118 119 if (vsi->rx_mapping_mode == ICE_VSI_MAP_CONTIG)120 wr32(hw, VPLAN_RX_QBASE(vf->vf_id), 0);121 else122 dev_err(dev, "Scattered mode for VF Rx queues is not yet implemented\n");123}124 125/**126 * ice_sriov_free_msix_res - Reset/free any used MSIX resources127 * @pf: pointer to the PF structure128 *129 * Since no MSIX entries are taken from the pf->irq_tracker then just clear130 * the pf->sriov_base_vector.131 *132 * Returns 0 on success, and -EINVAL on error.133 */134static int ice_sriov_free_msix_res(struct ice_pf *pf)135{136 if (!pf)137 return -EINVAL;138 139 bitmap_free(pf->sriov_irq_bm);140 pf->sriov_irq_size = 0;141 pf->sriov_base_vector = 0;142 143 return 0;144}145 146/**147 * ice_free_vfs - Free all VFs148 * @pf: pointer to the PF structure149 */150void 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 drivers165 * running in the host get themselves cleaned up before we yank166 * the carpet out from underneath their feet.167 */168 if (!pci_vfs_assigned(pf->pdev))169 pci_disable_sriov(pf->pdev);170 else171 dev_warn(dev, "VFs are assigned - not disabling SR-IOV\n");172 173 mutex_lock(&vfs->table_lock);174 175 ice_for_each_vf(pf, bkt, vf) {176 mutex_lock(&vf->cfg_lock);177 178 ice_eswitch_detach_vf(pf, vf);179 ice_dis_vf_qs(vf);180 181 if (test_bit(ICE_VF_STATE_INIT, vf->vf_states)) {182 /* disable VF qp mappings and set VF disable state */183 ice_dis_vf_mappings(vf);184 set_bit(ICE_VF_STATE_DIS, vf->vf_states);185 ice_free_vf_res(vf);186 }187 188 if (!pci_vfs_assigned(pf->pdev)) {189 u32 reg_idx, bit_idx;190 191 reg_idx = (hw->func_caps.vf_base_id + vf->vf_id) / 32;192 bit_idx = (hw->func_caps.vf_base_id + vf->vf_id) % 32;193 wr32(hw, GLGEN_VFLRSTAT(reg_idx), BIT(bit_idx));194 }195 196 /* clear malicious info since the VF is getting released */197 list_del(&vf->mbx_info.list_entry);198 199 mutex_unlock(&vf->cfg_lock);200 }201 202 if (ice_sriov_free_msix_res(pf))203 dev_err(dev, "Failed to free MSIX resources used by SR-IOV\n");204 205 vfs->num_qps_per = 0;206 ice_free_vf_entries(pf);207 208 mutex_unlock(&vfs->table_lock);209 210 clear_bit(ICE_VF_DIS, pf->state);211 clear_bit(ICE_FLAG_SRIOV_ENA, pf->flags);212}213 214/**215 * ice_vf_vsi_setup - Set up a VF VSI216 * @vf: VF to setup VSI for217 *218 * Returns pointer to the successfully allocated VSI struct on success,219 * otherwise returns NULL on failure.220 */221static struct ice_vsi *ice_vf_vsi_setup(struct ice_vf *vf)222{223 struct ice_vsi_cfg_params params = {};224 struct ice_pf *pf = vf->pf;225 struct ice_vsi *vsi;226 227 params.type = ICE_VSI_VF;228 params.port_info = ice_vf_get_port_info(vf);229 params.vf = vf;230 params.flags = ICE_VSI_FLAG_INIT;231 232 vsi = ice_vsi_setup(pf, ¶ms);233 234 if (!vsi) {235 dev_err(ice_pf_to_dev(pf), "Failed to create VF VSI\n");236 ice_vf_invalidate_vsi(vf);237 return NULL;238 }239 240 vf->lan_vsi_idx = vsi->idx;241 242 return vsi;243}244 245 246/**247 * ice_ena_vf_msix_mappings - enable VF MSIX mappings in hardware248 * @vf: VF to enable MSIX mappings for249 *250 * Some of the registers need to be indexed/configured using hardware global251 * device values and other registers need 0-based values, which represent PF252 * based values.253 */254static void ice_ena_vf_msix_mappings(struct ice_vf *vf)255{256 int device_based_first_msix, device_based_last_msix;257 int pf_based_first_msix, pf_based_last_msix, v;258 struct ice_pf *pf = vf->pf;259 int device_based_vf_id;260 struct ice_hw *hw;261 u32 reg;262 263 hw = &pf->hw;264 pf_based_first_msix = vf->first_vector_idx;265 pf_based_last_msix = (pf_based_first_msix + vf->num_msix) - 1;266 267 device_based_first_msix = pf_based_first_msix +268 pf->hw.func_caps.common_cap.msix_vector_first_id;269 device_based_last_msix =270 (device_based_first_msix + vf->num_msix) - 1;271 device_based_vf_id = vf->vf_id + hw->func_caps.vf_base_id;272 273 reg = FIELD_PREP(VPINT_ALLOC_FIRST_M, device_based_first_msix) |274 FIELD_PREP(VPINT_ALLOC_LAST_M, device_based_last_msix) |275 VPINT_ALLOC_VALID_M;276 wr32(hw, VPINT_ALLOC(vf->vf_id), reg);277 278 reg = FIELD_PREP(VPINT_ALLOC_PCI_FIRST_M, device_based_first_msix) |279 FIELD_PREP(VPINT_ALLOC_PCI_LAST_M, device_based_last_msix) |280 VPINT_ALLOC_PCI_VALID_M;281 wr32(hw, VPINT_ALLOC_PCI(vf->vf_id), reg);282 283 /* map the interrupts to its functions */284 for (v = pf_based_first_msix; v <= pf_based_last_msix; v++) {285 reg = FIELD_PREP(GLINT_VECT2FUNC_VF_NUM_M, device_based_vf_id) |286 FIELD_PREP(GLINT_VECT2FUNC_PF_NUM_M, hw->pf_id);287 wr32(hw, GLINT_VECT2FUNC(v), reg);288 }289 290 /* Map mailbox interrupt to VF MSI-X vector 0 */291 wr32(hw, VPINT_MBX_CTL(device_based_vf_id), VPINT_MBX_CTL_CAUSE_ENA_M);292}293 294/**295 * ice_ena_vf_q_mappings - enable Rx/Tx queue mappings for a VF296 * @vf: VF to enable the mappings for297 * @max_txq: max Tx queues allowed on the VF's VSI298 * @max_rxq: max Rx queues allowed on the VF's VSI299 */300static void ice_ena_vf_q_mappings(struct ice_vf *vf, u16 max_txq, u16 max_rxq)301{302 struct device *dev = ice_pf_to_dev(vf->pf);303 struct ice_vsi *vsi = ice_get_vf_vsi(vf);304 struct ice_hw *hw = &vf->pf->hw;305 u32 reg;306 307 if (WARN_ON(!vsi))308 return;309 310 /* set regardless of mapping mode */311 wr32(hw, VPLAN_TXQ_MAPENA(vf->vf_id), VPLAN_TXQ_MAPENA_TX_ENA_M);312 313 /* VF Tx queues allocation */314 if (vsi->tx_mapping_mode == ICE_VSI_MAP_CONTIG) {315 /* set the VF PF Tx queue range316 * VFNUMQ value should be set to (number of queues - 1). A value317 * of 0 means 1 queue and a value of 255 means 256 queues318 */319 reg = FIELD_PREP(VPLAN_TX_QBASE_VFFIRSTQ_M, vsi->txq_map[0]) |320 FIELD_PREP(VPLAN_TX_QBASE_VFNUMQ_M, max_txq - 1);321 wr32(hw, VPLAN_TX_QBASE(vf->vf_id), reg);322 } else {323 dev_err(dev, "Scattered mode for VF Tx queues is not yet implemented\n");324 }325 326 /* set regardless of mapping mode */327 wr32(hw, VPLAN_RXQ_MAPENA(vf->vf_id), VPLAN_RXQ_MAPENA_RX_ENA_M);328 329 /* VF Rx queues allocation */330 if (vsi->rx_mapping_mode == ICE_VSI_MAP_CONTIG) {331 /* set the VF PF Rx queue range332 * VFNUMQ value should be set to (number of queues - 1). A value333 * of 0 means 1 queue and a value of 255 means 256 queues334 */335 reg = FIELD_PREP(VPLAN_RX_QBASE_VFFIRSTQ_M, vsi->rxq_map[0]) |336 FIELD_PREP(VPLAN_RX_QBASE_VFNUMQ_M, max_rxq - 1);337 wr32(hw, VPLAN_RX_QBASE(vf->vf_id), reg);338 } else {339 dev_err(dev, "Scattered mode for VF Rx queues is not yet implemented\n");340 }341}342 343/**344 * ice_ena_vf_mappings - enable VF MSIX and queue mapping345 * @vf: pointer to the VF structure346 */347static void ice_ena_vf_mappings(struct ice_vf *vf)348{349 struct ice_vsi *vsi = ice_get_vf_vsi(vf);350 351 if (WARN_ON(!vsi))352 return;353 354 ice_ena_vf_msix_mappings(vf);355 ice_ena_vf_q_mappings(vf, vsi->alloc_txq, vsi->alloc_rxq);356}357 358/**359 * ice_calc_vf_reg_idx - Calculate the VF's register index in the PF space360 * @vf: VF to calculate the register index for361 * @q_vector: a q_vector associated to the VF362 */363void ice_calc_vf_reg_idx(struct ice_vf *vf, struct ice_q_vector *q_vector)364{365 if (!vf || !q_vector)366 return;367 368 /* always add one to account for the OICR being the first MSIX */369 q_vector->vf_reg_idx = q_vector->v_idx + ICE_NONQ_VECS_VF;370 q_vector->reg_idx = vf->first_vector_idx + q_vector->vf_reg_idx;371}372 373/**374 * ice_sriov_set_msix_res - Set any used MSIX resources375 * @pf: pointer to PF structure376 * @num_msix_needed: number of MSIX vectors needed for all SR-IOV VFs377 *378 * This function allows SR-IOV resources to be taken from the end of the PF's379 * allowed HW MSIX vectors so that the irq_tracker will not be affected. We380 * just set the pf->sriov_base_vector and return success.381 *382 * If there are not enough resources available, return an error. This should383 * always be caught by ice_set_per_vf_res().384 *385 * Return 0 on success, and -EINVAL when there are not enough MSIX vectors386 * in the PF's space available for SR-IOV.387 */388static int ice_sriov_set_msix_res(struct ice_pf *pf, u16 num_msix_needed)389{390 u16 total_vectors = pf->hw.func_caps.common_cap.num_msix_vectors;391 int vectors_used = ice_get_max_used_msix_vector(pf);392 int sriov_base_vector;393 394 sriov_base_vector = total_vectors - num_msix_needed;395 396 /* make sure we only grab irq_tracker entries from the list end and397 * that we have enough available MSIX vectors398 */399 if (sriov_base_vector < vectors_used)400 return -EINVAL;401 402 pf->sriov_base_vector = sriov_base_vector;403 404 return 0;405}406 407/**408 * ice_set_per_vf_res - check if vectors and queues are available409 * @pf: pointer to the PF structure410 * @num_vfs: the number of SR-IOV VFs being configured411 *412 * First, determine HW interrupts from common pool. If we allocate fewer VFs, we413 * get more vectors and can enable more queues per VF. Note that this does not414 * grab any vectors from the SW pool already allocated. Also note, that all415 * vector counts include one for each VF's miscellaneous interrupt vector416 * (i.e. OICR).417 *418 * Minimum VFs - 2 vectors, 1 queue pair419 * Small VFs - 5 vectors, 4 queue pairs420 * Medium VFs - 17 vectors, 16 queue pairs421 *422 * Second, determine number of queue pairs per VF by starting with a pre-defined423 * maximum each VF supports. If this is not possible, then we adjust based on424 * queue pairs available on the device.425 *426 * Lastly, set queue and MSI-X VF variables tracked by the PF so it can be used427 * by each VF during VF initialization and reset.428 */429static int ice_set_per_vf_res(struct ice_pf *pf, u16 num_vfs)430{431 int vectors_used = ice_get_max_used_msix_vector(pf);432 u16 num_msix_per_vf, num_txq, num_rxq, avail_qs;433 int msix_avail_per_vf, msix_avail_for_sriov;434 struct device *dev = ice_pf_to_dev(pf);435 int err;436 437 lockdep_assert_held(&pf->vfs.table_lock);438 439 if (!num_vfs)440 return -EINVAL;441 442 /* determine MSI-X resources per VF */443 msix_avail_for_sriov = pf->hw.func_caps.common_cap.num_msix_vectors -444 vectors_used;445 msix_avail_per_vf = msix_avail_for_sriov / num_vfs;446 if (msix_avail_per_vf >= ICE_NUM_VF_MSIX_MED) {447 num_msix_per_vf = ICE_NUM_VF_MSIX_MED;448 } else if (msix_avail_per_vf >= ICE_NUM_VF_MSIX_SMALL) {449 num_msix_per_vf = ICE_NUM_VF_MSIX_SMALL;450 } else if (msix_avail_per_vf >= ICE_NUM_VF_MSIX_MULTIQ_MIN) {451 num_msix_per_vf = ICE_NUM_VF_MSIX_MULTIQ_MIN;452 } else if (msix_avail_per_vf >= ICE_MIN_INTR_PER_VF) {453 num_msix_per_vf = ICE_MIN_INTR_PER_VF;454 } else {455 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",456 msix_avail_for_sriov, ICE_MIN_INTR_PER_VF,457 num_vfs);458 return -ENOSPC;459 }460 461 num_txq = min_t(u16, num_msix_per_vf - ICE_NONQ_VECS_VF,462 ICE_MAX_RSS_QS_PER_VF);463 avail_qs = ice_get_avail_txq_count(pf) / num_vfs;464 if (!avail_qs)465 num_txq = 0;466 else if (num_txq > avail_qs)467 num_txq = rounddown_pow_of_two(avail_qs);468 469 num_rxq = min_t(u16, num_msix_per_vf - ICE_NONQ_VECS_VF,470 ICE_MAX_RSS_QS_PER_VF);471 avail_qs = ice_get_avail_rxq_count(pf) / num_vfs;472 if (!avail_qs)473 num_rxq = 0;474 else if (num_rxq > avail_qs)475 num_rxq = rounddown_pow_of_two(avail_qs);476 477 if (num_txq < ICE_MIN_QS_PER_VF || num_rxq < ICE_MIN_QS_PER_VF) {478 dev_err(dev, "Not enough queues to support minimum of %d queue pairs per VF for %d VFs\n",479 ICE_MIN_QS_PER_VF, num_vfs);480 return -ENOSPC;481 }482 483 err = ice_sriov_set_msix_res(pf, num_msix_per_vf * num_vfs);484 if (err) {485 dev_err(dev, "Unable to set MSI-X resources for %d VFs, err %d\n",486 num_vfs, err);487 return err;488 }489 490 /* only allow equal Tx/Rx queue count (i.e. queue pairs) */491 pf->vfs.num_qps_per = min_t(int, num_txq, num_rxq);492 pf->vfs.num_msix_per = num_msix_per_vf;493 dev_info(dev, "Enabling %d VFs with %d vectors and %d queues per VF\n",494 num_vfs, pf->vfs.num_msix_per, pf->vfs.num_qps_per);495 496 return 0;497}498 499/**500 * ice_sriov_get_irqs - get irqs for SR-IOV usacase501 * @pf: pointer to PF structure502 * @needed: number of irqs to get503 *504 * This returns the first MSI-X vector index in PF space that is used by this505 * VF. This index is used when accessing PF relative registers such as506 * GLINT_VECT2FUNC and GLINT_DYN_CTL.507 * This will always be the OICR index in the AVF driver so any functionality508 * using vf->first_vector_idx for queue configuration_id: id of VF which will509 * use this irqs510 *511 * Only SRIOV specific vectors are tracked in sriov_irq_bm. SRIOV vectors are512 * allocated from the end of global irq index. First bit in sriov_irq_bm means513 * last irq index etc. It simplifies extension of SRIOV vectors.514 * They will be always located from sriov_base_vector to the last irq515 * index. While increasing/decreasing sriov_base_vector can be moved.516 */517static int ice_sriov_get_irqs(struct ice_pf *pf, u16 needed)518{519 int res = bitmap_find_next_zero_area(pf->sriov_irq_bm,520 pf->sriov_irq_size, 0, needed, 0);521 /* conversion from number in bitmap to global irq index */522 int index = pf->sriov_irq_size - res - needed;523 524 if (res >= pf->sriov_irq_size || index < pf->sriov_base_vector)525 return -ENOENT;526 527 bitmap_set(pf->sriov_irq_bm, res, needed);528 return index;529}530 531/**532 * ice_sriov_free_irqs - free irqs used by the VF533 * @pf: pointer to PF structure534 * @vf: pointer to VF structure535 */536static void ice_sriov_free_irqs(struct ice_pf *pf, struct ice_vf *vf)537{538 /* Move back from first vector index to first index in bitmap */539 int bm_i = pf->sriov_irq_size - vf->first_vector_idx - vf->num_msix;540 541 bitmap_clear(pf->sriov_irq_bm, bm_i, vf->num_msix);542 vf->first_vector_idx = 0;543}544 545/**546 * ice_init_vf_vsi_res - initialize/setup VF VSI resources547 * @vf: VF to initialize/setup the VSI for548 *549 * This function creates a VSI for the VF, adds a VLAN 0 filter, and sets up the550 * VF VSI's broadcast filter and is only used during initial VF creation.551 */552static int ice_init_vf_vsi_res(struct ice_vf *vf)553{554 struct ice_pf *pf = vf->pf;555 struct ice_vsi *vsi;556 int err;557 558 vf->first_vector_idx = ice_sriov_get_irqs(pf, vf->num_msix);559 if (vf->first_vector_idx < 0)560 return -ENOMEM;561 562 vsi = ice_vf_vsi_setup(vf);563 if (!vsi)564 return -ENOMEM;565 566 err = ice_vf_init_host_cfg(vf, vsi);567 if (err)568 goto release_vsi;569 570 return 0;571 572release_vsi:573 ice_vf_vsi_release(vf);574 return err;575}576 577/**578 * ice_start_vfs - start VFs so they are ready to be used by SR-IOV579 * @pf: PF the VFs are associated with580 */581static int ice_start_vfs(struct ice_pf *pf)582{583 struct ice_hw *hw = &pf->hw;584 unsigned int bkt, it_cnt;585 struct ice_vf *vf;586 int retval;587 588 lockdep_assert_held(&pf->vfs.table_lock);589 590 it_cnt = 0;591 ice_for_each_vf(pf, bkt, vf) {592 vf->vf_ops->clear_reset_trigger(vf);593 594 retval = ice_init_vf_vsi_res(vf);595 if (retval) {596 dev_err(ice_pf_to_dev(pf), "Failed to initialize VSI resources for VF %d, error %d\n",597 vf->vf_id, retval);598 goto teardown;599 }600 601 retval = ice_eswitch_attach_vf(pf, vf);602 if (retval) {603 dev_err(ice_pf_to_dev(pf), "Failed to attach VF %d to eswitch, error %d",604 vf->vf_id, retval);605 ice_vf_vsi_release(vf);606 goto teardown;607 }608 609 set_bit(ICE_VF_STATE_INIT, vf->vf_states);610 ice_ena_vf_mappings(vf);611 wr32(hw, VFGEN_RSTAT(vf->vf_id), VIRTCHNL_VFR_VFACTIVE);612 it_cnt++;613 }614 615 ice_flush(hw);616 return 0;617 618teardown:619 ice_for_each_vf(pf, bkt, vf) {620 if (it_cnt == 0)621 break;622 623 ice_dis_vf_mappings(vf);624 ice_vf_vsi_release(vf);625 it_cnt--;626 }627 628 return retval;629}630 631/**632 * ice_sriov_free_vf - Free VF memory after all references are dropped633 * @vf: pointer to VF to free634 *635 * Called by ice_put_vf through ice_release_vf once the last reference to a VF636 * structure has been dropped.637 */638static void ice_sriov_free_vf(struct ice_vf *vf)639{640 mutex_destroy(&vf->cfg_lock);641 642 kfree_rcu(vf, rcu);643}644 645/**646 * ice_sriov_clear_reset_state - clears VF Reset status register647 * @vf: the vf to configure648 */649static void ice_sriov_clear_reset_state(struct ice_vf *vf)650{651 struct ice_hw *hw = &vf->pf->hw;652 653 /* Clear the reset status register so that VF immediately sees that654 * the device is resetting, even if hardware hasn't yet gotten around655 * to clearing VFGEN_RSTAT for us.656 */657 wr32(hw, VFGEN_RSTAT(vf->vf_id), VIRTCHNL_VFR_INPROGRESS);658}659 660/**661 * ice_sriov_clear_mbx_register - clears SRIOV VF's mailbox registers662 * @vf: the vf to configure663 */664static void ice_sriov_clear_mbx_register(struct ice_vf *vf)665{666 struct ice_pf *pf = vf->pf;667 668 wr32(&pf->hw, VF_MBX_ARQLEN(vf->vf_id), 0);669 wr32(&pf->hw, VF_MBX_ATQLEN(vf->vf_id), 0);670}671 672/**673 * ice_sriov_trigger_reset_register - trigger VF reset for SRIOV VF674 * @vf: pointer to VF structure675 * @is_vflr: true if reset occurred due to VFLR676 *677 * Trigger and cleanup after a VF reset for a SR-IOV VF.678 */679static void ice_sriov_trigger_reset_register(struct ice_vf *vf, bool is_vflr)680{681 struct ice_pf *pf = vf->pf;682 u32 reg, reg_idx, bit_idx;683 unsigned int vf_abs_id, i;684 struct device *dev;685 struct ice_hw *hw;686 687 dev = ice_pf_to_dev(pf);688 hw = &pf->hw;689 vf_abs_id = vf->vf_id + hw->func_caps.vf_base_id;690 691 /* In the case of a VFLR, HW has already reset the VF and we just need692 * to clean up. Otherwise we must first trigger the reset using the693 * VFRTRIG register.694 */695 if (!is_vflr) {696 reg = rd32(hw, VPGEN_VFRTRIG(vf->vf_id));697 reg |= VPGEN_VFRTRIG_VFSWR_M;698 wr32(hw, VPGEN_VFRTRIG(vf->vf_id), reg);699 }700 701 /* clear the VFLR bit in GLGEN_VFLRSTAT */702 reg_idx = (vf_abs_id) / 32;703 bit_idx = (vf_abs_id) % 32;704 wr32(hw, GLGEN_VFLRSTAT(reg_idx), BIT(bit_idx));705 ice_flush(hw);706 707 wr32(hw, PF_PCI_CIAA,708 VF_DEVICE_STATUS | (vf_abs_id << PF_PCI_CIAA_VF_NUM_S));709 for (i = 0; i < ICE_PCI_CIAD_WAIT_COUNT; i++) {710 reg = rd32(hw, PF_PCI_CIAD);711 /* no transactions pending so stop polling */712 if ((reg & VF_TRANS_PENDING_M) == 0)713 break;714 715 dev_err(dev, "VF %u PCI transactions stuck\n", vf->vf_id);716 udelay(ICE_PCI_CIAD_WAIT_DELAY_US);717 }718}719 720/**721 * ice_sriov_poll_reset_status - poll SRIOV VF reset status722 * @vf: pointer to VF structure723 *724 * Returns true when reset is successful, else returns false725 */726static bool ice_sriov_poll_reset_status(struct ice_vf *vf)727{728 struct ice_pf *pf = vf->pf;729 unsigned int i;730 u32 reg;731 732 for (i = 0; i < 10; i++) {733 /* VF reset requires driver to first reset the VF and then734 * poll the status register to make sure that the reset735 * completed successfully.736 */737 reg = rd32(&pf->hw, VPGEN_VFRSTAT(vf->vf_id));738 if (reg & VPGEN_VFRSTAT_VFRD_M)739 return true;740 741 /* only sleep if the reset is not done */742 usleep_range(10, 20);743 }744 return false;745}746 747/**748 * ice_sriov_clear_reset_trigger - enable VF to access hardware749 * @vf: VF to enabled hardware access for750 */751static void ice_sriov_clear_reset_trigger(struct ice_vf *vf)752{753 struct ice_hw *hw = &vf->pf->hw;754 u32 reg;755 756 reg = rd32(hw, VPGEN_VFRTRIG(vf->vf_id));757 reg &= ~VPGEN_VFRTRIG_VFSWR_M;758 wr32(hw, VPGEN_VFRTRIG(vf->vf_id), reg);759 ice_flush(hw);760}761 762/**763 * ice_sriov_post_vsi_rebuild - tasks to do after the VF's VSI have been rebuilt764 * @vf: VF to perform tasks on765 */766static void ice_sriov_post_vsi_rebuild(struct ice_vf *vf)767{768 ice_ena_vf_mappings(vf);769 wr32(&vf->pf->hw, VFGEN_RSTAT(vf->vf_id), VIRTCHNL_VFR_VFACTIVE);770}771 772static const struct ice_vf_ops ice_sriov_vf_ops = {773 .reset_type = ICE_VF_RESET,774 .free = ice_sriov_free_vf,775 .clear_reset_state = ice_sriov_clear_reset_state,776 .clear_mbx_register = ice_sriov_clear_mbx_register,777 .trigger_reset_register = ice_sriov_trigger_reset_register,778 .poll_reset_status = ice_sriov_poll_reset_status,779 .clear_reset_trigger = ice_sriov_clear_reset_trigger,780 .irq_close = NULL,781 .post_vsi_rebuild = ice_sriov_post_vsi_rebuild,782};783 784/**785 * ice_create_vf_entries - Allocate and insert VF entries786 * @pf: pointer to the PF structure787 * @num_vfs: the number of VFs to allocate788 *789 * Allocate new VF entries and insert them into the hash table. Set some790 * basic default fields for initializing the new VFs.791 *792 * After this function exits, the hash table will have num_vfs entries793 * inserted.794 *795 * Returns 0 on success or an integer error code on failure.796 */797static int ice_create_vf_entries(struct ice_pf *pf, u16 num_vfs)798{799 struct pci_dev *pdev = pf->pdev;800 struct ice_vfs *vfs = &pf->vfs;801 struct pci_dev *vfdev = NULL;802 struct ice_vf *vf;803 u16 vf_pdev_id;804 int err, pos;805 806 lockdep_assert_held(&vfs->table_lock);807 808 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);809 pci_read_config_word(pdev, pos + PCI_SRIOV_VF_DID, &vf_pdev_id);810 811 for (u16 vf_id = 0; vf_id < num_vfs; vf_id++) {812 vf = kzalloc(sizeof(*vf), GFP_KERNEL);813 if (!vf) {814 err = -ENOMEM;815 goto err_free_entries;816 }817 kref_init(&vf->refcnt);818 819 vf->pf = pf;820 vf->vf_id = vf_id;821 822 /* set sriov vf ops for VFs created during SRIOV flow */823 vf->vf_ops = &ice_sriov_vf_ops;824 825 ice_initialize_vf_entry(vf);826 827 do {828 vfdev = pci_get_device(pdev->vendor, vf_pdev_id, vfdev);829 } while (vfdev && vfdev->physfn != pdev);830 vf->vfdev = vfdev;831 vf->vf_sw_id = pf->first_sw;832 833 pci_dev_get(vfdev);834 835 hash_add_rcu(vfs->table, &vf->entry, vf_id);836 }837 838 /* Decrement of refcount done by pci_get_device() inside the loop does839 * not touch the last iteration's vfdev, so it has to be done manually840 * to balance pci_dev_get() added within the loop.841 */842 pci_dev_put(vfdev);843 844 return 0;845 846err_free_entries:847 ice_free_vf_entries(pf);848 return err;849}850 851/**852 * ice_ena_vfs - enable VFs so they are ready to be used853 * @pf: pointer to the PF structure854 * @num_vfs: number of VFs to enable855 */856static int ice_ena_vfs(struct ice_pf *pf, u16 num_vfs)857{858 int total_vectors = pf->hw.func_caps.common_cap.num_msix_vectors;859 struct device *dev = ice_pf_to_dev(pf);860 struct ice_hw *hw = &pf->hw;861 int ret;862 863 pf->sriov_irq_bm = bitmap_zalloc(total_vectors, GFP_KERNEL);864 if (!pf->sriov_irq_bm)865 return -ENOMEM;866 pf->sriov_irq_size = total_vectors;867 868 /* Disable global interrupt 0 so we don't try to handle the VFLR. */869 wr32(hw, GLINT_DYN_CTL(pf->oicr_irq.index),870 ICE_ITR_NONE << GLINT_DYN_CTL_ITR_INDX_S);871 set_bit(ICE_OICR_INTR_DIS, pf->state);872 ice_flush(hw);873 874 ret = pci_enable_sriov(pf->pdev, num_vfs);875 if (ret)876 goto err_unroll_intr;877 878 mutex_lock(&pf->vfs.table_lock);879 880 ret = ice_set_per_vf_res(pf, num_vfs);881 if (ret) {882 dev_err(dev, "Not enough resources for %d VFs, err %d. Try with fewer number of VFs\n",883 num_vfs, ret);884 goto err_unroll_sriov;885 }886 887 ret = ice_create_vf_entries(pf, num_vfs);888 if (ret) {889 dev_err(dev, "Failed to allocate VF entries for %d VFs\n",890 num_vfs);891 goto err_unroll_sriov;892 }893 894 ret = ice_start_vfs(pf);895 if (ret) {896 dev_err(dev, "Failed to start %d VFs, err %d\n", num_vfs, ret);897 ret = -EAGAIN;898 goto err_unroll_vf_entries;899 }900 901 clear_bit(ICE_VF_DIS, pf->state);902 903 /* rearm global interrupts */904 if (test_and_clear_bit(ICE_OICR_INTR_DIS, pf->state))905 ice_irq_dynamic_ena(hw, NULL, NULL);906 907 mutex_unlock(&pf->vfs.table_lock);908 909 return 0;910 911err_unroll_vf_entries:912 ice_free_vf_entries(pf);913err_unroll_sriov:914 mutex_unlock(&pf->vfs.table_lock);915 pci_disable_sriov(pf->pdev);916err_unroll_intr:917 /* rearm interrupts here */918 ice_irq_dynamic_ena(hw, NULL, NULL);919 clear_bit(ICE_OICR_INTR_DIS, pf->state);920 bitmap_free(pf->sriov_irq_bm);921 return ret;922}923 924/**925 * ice_pci_sriov_ena - Enable or change number of VFs926 * @pf: pointer to the PF structure927 * @num_vfs: number of VFs to allocate928 *929 * Returns 0 on success and negative on failure930 */931static int ice_pci_sriov_ena(struct ice_pf *pf, int num_vfs)932{933 struct device *dev = ice_pf_to_dev(pf);934 int err;935 936 if (!num_vfs) {937 ice_free_vfs(pf);938 return 0;939 }940 941 if (num_vfs > pf->vfs.num_supported) {942 dev_err(dev, "Can't enable %d VFs, max VFs supported is %d\n",943 num_vfs, pf->vfs.num_supported);944 return -EOPNOTSUPP;945 }946 947 dev_info(dev, "Enabling %d VFs\n", num_vfs);948 err = ice_ena_vfs(pf, num_vfs);949 if (err) {950 dev_err(dev, "Failed to enable SR-IOV: %d\n", err);951 return err;952 }953 954 set_bit(ICE_FLAG_SRIOV_ENA, pf->flags);955 return 0;956}957 958/**959 * ice_check_sriov_allowed - check if SR-IOV is allowed based on various checks960 * @pf: PF to enabled SR-IOV on961 */962static int ice_check_sriov_allowed(struct ice_pf *pf)963{964 struct device *dev = ice_pf_to_dev(pf);965 966 if (!test_bit(ICE_FLAG_SRIOV_CAPABLE, pf->flags)) {967 dev_err(dev, "This device is not capable of SR-IOV\n");968 return -EOPNOTSUPP;969 }970 971 if (ice_is_safe_mode(pf)) {972 dev_err(dev, "SR-IOV cannot be configured - Device is in Safe Mode\n");973 return -EOPNOTSUPP;974 }975 976 if (!ice_pf_state_is_nominal(pf)) {977 dev_err(dev, "Cannot enable SR-IOV, device not ready\n");978 return -EBUSY;979 }980 981 return 0;982}983 984/**985 * ice_sriov_get_vf_total_msix - return number of MSI-X used by VFs986 * @pdev: pointer to pci_dev struct987 *988 * The function is called via sysfs ops989 */990u32 ice_sriov_get_vf_total_msix(struct pci_dev *pdev)991{992 struct ice_pf *pf = pci_get_drvdata(pdev);993 994 return pf->sriov_irq_size - ice_get_max_used_msix_vector(pf);995}996 997static int ice_sriov_move_base_vector(struct ice_pf *pf, int move)998{999 if (pf->sriov_base_vector - move < ice_get_max_used_msix_vector(pf))1000 return -ENOMEM;1001 1002 pf->sriov_base_vector -= move;1003 return 0;1004}1005 1006static void ice_sriov_remap_vectors(struct ice_pf *pf, u16 restricted_id)1007{1008 u16 vf_ids[ICE_MAX_SRIOV_VFS];1009 struct ice_vf *tmp_vf;1010 int to_remap = 0, bkt;1011 1012 /* For better irqs usage try to remap irqs of VFs1013 * that aren't running yet1014 */1015 ice_for_each_vf(pf, bkt, tmp_vf) {1016 /* skip VF which is changing the number of MSI-X */1017 if (restricted_id == tmp_vf->vf_id ||1018 test_bit(ICE_VF_STATE_ACTIVE, tmp_vf->vf_states))1019 continue;1020 1021 ice_dis_vf_mappings(tmp_vf);1022 ice_sriov_free_irqs(pf, tmp_vf);1023 1024 vf_ids[to_remap] = tmp_vf->vf_id;1025 to_remap += 1;1026 }1027 1028 for (int i = 0; i < to_remap; i++) {1029 tmp_vf = ice_get_vf_by_id(pf, vf_ids[i]);1030 if (!tmp_vf)1031 continue;1032 1033 tmp_vf->first_vector_idx =1034 ice_sriov_get_irqs(pf, tmp_vf->num_msix);1035 /* there is no need to rebuild VSI as we are only changing the1036 * vector indexes not amount of MSI-X or queues1037 */1038 ice_ena_vf_mappings(tmp_vf);1039 ice_put_vf(tmp_vf);1040 }1041}1042 1043/**1044 * ice_sriov_set_msix_vec_count1045 * @vf_dev: pointer to pci_dev struct of VF device1046 * @msix_vec_count: new value for MSI-X amount on this VF1047 *1048 * Set requested MSI-X, queues and registers for @vf_dev.1049 *1050 * First do some sanity checks like if there are any VFs, if the new value1051 * is correct etc. Then disable old mapping (MSI-X and queues registers), change1052 * MSI-X and queues, rebuild VSI and enable new mapping.1053 *1054 * If it is possible (driver not binded to VF) try to remap also other VFs to1055 * linearize irqs register usage.1056 */1057int ice_sriov_set_msix_vec_count(struct pci_dev *vf_dev, int msix_vec_count)1058{1059 struct pci_dev *pdev = pci_physfn(vf_dev);1060 struct ice_pf *pf = pci_get_drvdata(pdev);1061 u16 prev_msix, prev_queues, queues;1062 bool needs_rebuild = false;1063 struct ice_vsi *vsi;1064 struct ice_vf *vf;1065 int id;1066 1067 if (!ice_get_num_vfs(pf))1068 return -ENOENT;1069 1070 if (!msix_vec_count)1071 return 0;1072 1073 queues = msix_vec_count;1074 /* add 1 MSI-X for OICR */1075 msix_vec_count += 1;1076 1077 if (queues > min(ice_get_avail_txq_count(pf),1078 ice_get_avail_rxq_count(pf)))1079 return -EINVAL;1080 1081 if (msix_vec_count < ICE_MIN_INTR_PER_VF)1082 return -EINVAL;1083 1084 /* Transition of PCI VF function number to function_id */1085 for (id = 0; id < pci_num_vf(pdev); id++) {1086 if (vf_dev->devfn == pci_iov_virtfn_devfn(pdev, id))1087 break;1088 }1089 1090 if (id == pci_num_vf(pdev))1091 return -ENOENT;1092 1093 vf = ice_get_vf_by_id(pf, id);1094 1095 if (!vf)1096 return -ENOENT;1097 1098 vsi = ice_get_vf_vsi(vf);1099 if (!vsi) {1100 ice_put_vf(vf);1101 return -ENOENT;1102 }1103 1104 prev_msix = vf->num_msix;1105 prev_queues = vf->num_vf_qs;1106 1107 if (ice_sriov_move_base_vector(pf, msix_vec_count - prev_msix)) {1108 ice_put_vf(vf);1109 return -ENOSPC;1110 }1111 1112 ice_dis_vf_mappings(vf);1113 ice_sriov_free_irqs(pf, vf);1114 1115 /* Remap all VFs beside the one is now configured */1116 ice_sriov_remap_vectors(pf, vf->vf_id);1117 1118 vf->num_msix = msix_vec_count;1119 vf->num_vf_qs = queues;1120 vf->first_vector_idx = ice_sriov_get_irqs(pf, vf->num_msix);1121 if (vf->first_vector_idx < 0)1122 goto unroll;1123 1124 vsi->req_txq = queues;1125 vsi->req_rxq = queues;1126 1127 if (ice_vsi_rebuild(vsi, ICE_VSI_FLAG_NO_INIT)) {1128 /* Try to rebuild with previous values */1129 needs_rebuild = true;1130 goto unroll;1131 }1132 1133 dev_info(ice_pf_to_dev(pf),1134 "Changing VF %d resources to %d vectors and %d queues\n",1135 vf->vf_id, vf->num_msix, vf->num_vf_qs);1136 1137 ice_ena_vf_mappings(vf);1138 ice_put_vf(vf);1139 1140 return 0;1141 1142unroll:1143 dev_info(ice_pf_to_dev(pf),1144 "Can't set %d vectors on VF %d, falling back to %d\n",1145 vf->num_msix, vf->vf_id, prev_msix);1146 1147 vf->num_msix = prev_msix;1148 vf->num_vf_qs = prev_queues;1149 vf->first_vector_idx = ice_sriov_get_irqs(pf, vf->num_msix);1150 if (vf->first_vector_idx < 0) {1151 ice_put_vf(vf);1152 return -EINVAL;1153 }1154 1155 if (needs_rebuild) {1156 vsi->req_txq = prev_queues;1157 vsi->req_rxq = prev_queues;1158 1159 ice_vsi_rebuild(vsi, ICE_VSI_FLAG_NO_INIT);1160 }1161 1162 ice_ena_vf_mappings(vf);1163 ice_put_vf(vf);1164 1165 return -EINVAL;1166}1167 1168/**1169 * ice_sriov_configure - Enable or change number of VFs via sysfs1170 * @pdev: pointer to a pci_dev structure1171 * @num_vfs: number of VFs to allocate or 0 to free VFs1172 *1173 * This function is called when the user updates the number of VFs in sysfs. On1174 * success return whatever num_vfs was set to by the caller. Return negative on1175 * failure.1176 */1177int ice_sriov_configure(struct pci_dev *pdev, int num_vfs)1178{1179 struct ice_pf *pf = pci_get_drvdata(pdev);1180 struct device *dev = ice_pf_to_dev(pf);1181 int err;1182 1183 err = ice_check_sriov_allowed(pf);1184 if (err)1185 return err;1186 1187 if (!num_vfs) {1188 if (!pci_vfs_assigned(pdev)) {1189 ice_free_vfs(pf);1190 return 0;1191 }1192 1193 dev_err(dev, "can't free VFs because some are assigned to VMs.\n");1194 return -EBUSY;1195 }1196 1197 err = ice_pci_sriov_ena(pf, num_vfs);1198 if (err)1199 return err;1200 1201 return num_vfs;1202}1203 1204/**1205 * ice_process_vflr_event - Free VF resources via IRQ calls1206 * @pf: pointer to the PF structure1207 *1208 * called from the VFLR IRQ handler to1209 * free up VF resources and state variables1210 */1211void ice_process_vflr_event(struct ice_pf *pf)1212{1213 struct ice_hw *hw = &pf->hw;1214 struct ice_vf *vf;1215 unsigned int bkt;1216 u32 reg;1217 1218 if (!test_and_clear_bit(ICE_VFLR_EVENT_PENDING, pf->state) ||1219 !ice_has_vfs(pf))1220 return;1221 1222 mutex_lock(&pf->vfs.table_lock);1223 ice_for_each_vf(pf, bkt, vf) {1224 u32 reg_idx, bit_idx;1225 1226 reg_idx = (hw->func_caps.vf_base_id + vf->vf_id) / 32;1227 bit_idx = (hw->func_caps.vf_base_id + vf->vf_id) % 32;1228 /* read GLGEN_VFLRSTAT register to find out the flr VFs */1229 reg = rd32(hw, GLGEN_VFLRSTAT(reg_idx));1230 if (reg & BIT(bit_idx))1231 /* GLGEN_VFLRSTAT bit will be cleared in ice_reset_vf */1232 ice_reset_vf(vf, ICE_VF_RESET_VFLR | ICE_VF_RESET_LOCK);1233 }1234 mutex_unlock(&pf->vfs.table_lock);1235}1236 1237/**1238 * ice_get_vf_from_pfq - get the VF who owns the PF space queue passed in1239 * @pf: PF used to index all VFs1240 * @pfq: queue index relative to the PF's function space1241 *1242 * If no VF is found who owns the pfq then return NULL, otherwise return a1243 * pointer to the VF who owns the pfq1244 *1245 * If this function returns non-NULL, it acquires a reference count of the VF1246 * structure. The caller is responsible for calling ice_put_vf() to drop this1247 * reference.1248 */1249static struct ice_vf *ice_get_vf_from_pfq(struct ice_pf *pf, u16 pfq)1250{1251 struct ice_vf *vf;1252 unsigned int bkt;1253 1254 rcu_read_lock();1255 ice_for_each_vf_rcu(pf, bkt, vf) {1256 struct ice_vsi *vsi;1257 u16 rxq_idx;1258 1259 vsi = ice_get_vf_vsi(vf);1260 if (!vsi)1261 continue;1262 1263 ice_for_each_rxq(vsi, rxq_idx)1264 if (vsi->rxq_map[rxq_idx] == pfq) {1265 struct ice_vf *found;1266 1267 if (kref_get_unless_zero(&vf->refcnt))1268 found = vf;1269 else1270 found = NULL;1271 rcu_read_unlock();1272 return found;1273 }1274 }1275 rcu_read_unlock();1276 1277 return NULL;1278}1279 1280/**1281 * ice_globalq_to_pfq - convert from global queue index to PF space queue index1282 * @pf: PF used for conversion1283 * @globalq: global queue index used to convert to PF space queue index1284 */1285static u32 ice_globalq_to_pfq(struct ice_pf *pf, u32 globalq)1286{1287 return globalq - pf->hw.func_caps.common_cap.rxq_first_id;1288}1289 1290/**1291 * ice_vf_lan_overflow_event - handle LAN overflow event for a VF1292 * @pf: PF that the LAN overflow event happened on1293 * @event: structure holding the event information for the LAN overflow event1294 *1295 * Determine if the LAN overflow event was caused by a VF queue. If it was not1296 * caused by a VF, do nothing. If a VF caused this LAN overflow event trigger a1297 * reset on the offending VF.1298 */1299void1300ice_vf_lan_overflow_event(struct ice_pf *pf, struct ice_rq_event_info *event)1301{1302 u32 gldcb_rtctq, queue;1303 struct ice_vf *vf;1304 1305 gldcb_rtctq = le32_to_cpu(event->desc.params.lan_overflow.prtdcb_ruptq);1306 dev_dbg(ice_pf_to_dev(pf), "GLDCB_RTCTQ: 0x%08x\n", gldcb_rtctq);1307 1308 /* event returns device global Rx queue number */1309 queue = FIELD_GET(GLDCB_RTCTQ_RXQNUM_M, gldcb_rtctq);1310 1311 vf = ice_get_vf_from_pfq(pf, ice_globalq_to_pfq(pf, queue));1312 if (!vf)1313 return;1314 1315 ice_reset_vf(vf, ICE_VF_RESET_NOTIFY | ICE_VF_RESET_LOCK);1316 ice_put_vf(vf);1317}1318 1319/**1320 * ice_set_vf_spoofchk1321 * @netdev: network interface device structure1322 * @vf_id: VF identifier1323 * @ena: flag to enable or disable feature1324 *1325 * Enable or disable VF spoof checking1326 */1327int ice_set_vf_spoofchk(struct net_device *netdev, int vf_id, bool ena)1328{1329 struct ice_netdev_priv *np = netdev_priv(netdev);1330 struct ice_pf *pf = np->vsi->back;1331 struct ice_vsi *vf_vsi;1332 struct device *dev;1333 struct ice_vf *vf;1334 int ret;1335 1336 dev = ice_pf_to_dev(pf);1337 1338 vf = ice_get_vf_by_id(pf, vf_id);1339 if (!vf)1340 return -EINVAL;1341 1342 ret = ice_check_vf_ready_for_cfg(vf);1343 if (ret)1344 goto out_put_vf;1345 1346 vf_vsi = ice_get_vf_vsi(vf);1347 if (!vf_vsi) {1348 netdev_err(netdev, "VSI %d for VF %d is null\n",1349 vf->lan_vsi_idx, vf->vf_id);1350 ret = -EINVAL;1351 goto out_put_vf;1352 }1353 1354 if (vf_vsi->type != ICE_VSI_VF) {1355 netdev_err(netdev, "Type %d of VSI %d for VF %d is no ICE_VSI_VF\n",1356 vf_vsi->type, vf_vsi->vsi_num, vf->vf_id);1357 ret = -ENODEV;1358 goto out_put_vf;1359 }1360 1361 if (ena == vf->spoofchk) {1362 dev_dbg(dev, "VF spoofchk already %s\n", ena ? "ON" : "OFF");1363 ret = 0;1364 goto out_put_vf;1365 }1366 1367 ret = ice_vsi_apply_spoofchk(vf_vsi, ena);1368 if (ret)1369 dev_err(dev, "Failed to set spoofchk %s for VF %d VSI %d\n error %d\n",1370 ena ? "ON" : "OFF", vf->vf_id, vf_vsi->vsi_num, ret);1371 else1372 vf->spoofchk = ena;1373 1374out_put_vf:1375 ice_put_vf(vf);1376 return ret;1377}1378 1379/**1380 * ice_get_vf_cfg1381 * @netdev: network interface device structure1382 * @vf_id: VF identifier1383 * @ivi: VF configuration structure1384 *1385 * return VF configuration1386 */1387int1388ice_get_vf_cfg(struct net_device *netdev, int vf_id, struct ifla_vf_info *ivi)1389{1390 struct ice_pf *pf = ice_netdev_to_pf(netdev);1391 struct ice_vf *vf;1392 int ret;1393 1394 vf = ice_get_vf_by_id(pf, vf_id);1395 if (!vf)1396 return -EINVAL;1397 1398 ret = ice_check_vf_ready_for_cfg(vf);1399 if (ret)1400 goto out_put_vf;1401 1402 ivi->vf = vf_id;1403 ether_addr_copy(ivi->mac, vf->hw_lan_addr);1404 1405 /* VF configuration for VLAN and applicable QoS */1406 ivi->vlan = ice_vf_get_port_vlan_id(vf);1407 ivi->qos = ice_vf_get_port_vlan_prio(vf);1408 if (ice_vf_is_port_vlan_ena(vf))1409 ivi->vlan_proto = cpu_to_be16(ice_vf_get_port_vlan_tpid(vf));1410 1411 ivi->trusted = vf->trusted;1412 ivi->spoofchk = vf->spoofchk;1413 if (!vf->link_forced)1414 ivi->linkstate = IFLA_VF_LINK_STATE_AUTO;1415 else if (vf->link_up)1416 ivi->linkstate = IFLA_VF_LINK_STATE_ENABLE;1417 else1418 ivi->linkstate = IFLA_VF_LINK_STATE_DISABLE;1419 ivi->max_tx_rate = vf->max_tx_rate;1420 ivi->min_tx_rate = vf->min_tx_rate;1421 1422out_put_vf:1423 ice_put_vf(vf);1424 return ret;1425}1426 1427/**1428 * __ice_set_vf_mac - program VF MAC address1429 * @pf: PF to be configure1430 * @vf_id: VF identifier1431 * @mac: MAC address1432 *1433 * program VF MAC address1434 * Return: zero on success or an error code on failure1435 */1436int __ice_set_vf_mac(struct ice_pf *pf, u16 vf_id, const u8 *mac)1437{1438 struct device *dev;1439 struct ice_vf *vf;1440 int ret;1441 1442 dev = ice_pf_to_dev(pf);1443 if (is_multicast_ether_addr(mac)) {1444 dev_err(dev, "%pM not a valid unicast address\n", mac);1445 return -EINVAL;1446 }1447 1448 vf = ice_get_vf_by_id(pf, vf_id);1449 if (!vf)1450 return -EINVAL;1451 1452 /* nothing left to do, unicast MAC already set */1453 if (ether_addr_equal(vf->dev_lan_addr, mac) &&1454 ether_addr_equal(vf->hw_lan_addr, mac)) {1455 ret = 0;1456 goto out_put_vf;1457 }1458 1459 ret = ice_check_vf_ready_for_cfg(vf);1460 if (ret)1461 goto out_put_vf;1462 1463 mutex_lock(&vf->cfg_lock);1464 1465 /* VF is notified of its new MAC via the PF's response to the1466 * VIRTCHNL_OP_GET_VF_RESOURCES message after the VF has been reset1467 */1468 ether_addr_copy(vf->dev_lan_addr, mac);1469 ether_addr_copy(vf->hw_lan_addr, mac);1470 if (is_zero_ether_addr(mac)) {1471 /* VF will send VIRTCHNL_OP_ADD_ETH_ADDR message with its MAC */1472 vf->pf_set_mac = false;1473 dev_info(dev, "Removing MAC on VF %d. VF driver will be reinitialized\n",1474 vf->vf_id);1475 } else {1476 /* PF will add MAC rule for the VF */1477 vf->pf_set_mac = true;1478 dev_info(dev, "Setting MAC %pM on VF %d. VF driver will be reinitialized\n",1479 mac, vf_id);1480 }1481 1482 ice_reset_vf(vf, ICE_VF_RESET_NOTIFY);1483 mutex_unlock(&vf->cfg_lock);1484 1485out_put_vf:1486 ice_put_vf(vf);1487 return ret;1488}1489 1490/**1491 * ice_set_vf_mac - .ndo_set_vf_mac handler1492 * @netdev: network interface device structure1493 * @vf_id: VF identifier1494 * @mac: MAC address1495 *1496 * program VF MAC address1497 * Return: zero on success or an error code on failure1498 */1499int ice_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac)1500{1501 return __ice_set_vf_mac(ice_netdev_to_pf(netdev), vf_id, mac);1502}1503 1504/**1505 * ice_set_vf_trust1506 * @netdev: network interface device structure1507 * @vf_id: VF identifier1508 * @trusted: Boolean value to enable/disable trusted VF1509 *1510 * Enable or disable a given VF as trusted1511 */1512int ice_set_vf_trust(struct net_device *netdev, int vf_id, bool trusted)1513{1514 struct ice_pf *pf = ice_netdev_to_pf(netdev);1515 struct ice_vf *vf;1516 int ret;1517 1518 vf = ice_get_vf_by_id(pf, vf_id);1519 if (!vf)1520 return -EINVAL;1521 1522 if (ice_is_eswitch_mode_switchdev(pf)) {1523 dev_info(ice_pf_to_dev(pf), "Trusted VF is forbidden in switchdev mode\n");1524 return -EOPNOTSUPP;1525 }1526 1527 ret = ice_check_vf_ready_for_cfg(vf);1528 if (ret)1529 goto out_put_vf;1530 1531 /* Check if already trusted */1532 if (trusted == vf->trusted) {1533 ret = 0;1534 goto out_put_vf;1535 }1536 1537 mutex_lock(&vf->cfg_lock);1538 1539 vf->trusted = trusted;1540 ice_reset_vf(vf, ICE_VF_RESET_NOTIFY);1541 dev_info(ice_pf_to_dev(pf), "VF %u is now %strusted\n",1542 vf_id, trusted ? "" : "un");1543 1544 mutex_unlock(&vf->cfg_lock);1545 1546out_put_vf:1547 ice_put_vf(vf);1548 return ret;1549}1550 1551/**1552 * ice_set_vf_link_state1553 * @netdev: network interface device structure1554 * @vf_id: VF identifier1555 * @link_state: required link state1556 *1557 * Set VF's link state, irrespective of physical link state status1558 */1559int ice_set_vf_link_state(struct net_device *netdev, int vf_id, int link_state)1560{1561 struct ice_pf *pf = ice_netdev_to_pf(netdev);1562 struct ice_vf *vf;1563 int ret;1564 1565 vf = ice_get_vf_by_id(pf, vf_id);1566 if (!vf)1567 return -EINVAL;1568 1569 ret = ice_check_vf_ready_for_cfg(vf);1570 if (ret)1571 goto out_put_vf;1572 1573 switch (link_state) {1574 case IFLA_VF_LINK_STATE_AUTO:1575 vf->link_forced = false;1576 break;1577 case IFLA_VF_LINK_STATE_ENABLE:1578 vf->link_forced = true;1579 vf->link_up = true;1580 break;1581 case IFLA_VF_LINK_STATE_DISABLE:1582 vf->link_forced = true;1583 vf->link_up = false;1584 break;1585 default:1586 ret = -EINVAL;1587 goto out_put_vf;1588 }1589 1590 ice_vc_notify_vf_link_state(vf);1591 1592out_put_vf:1593 ice_put_vf(vf);1594 return ret;1595}1596 1597/**1598 * ice_calc_all_vfs_min_tx_rate - calculate cumulative min Tx rate on all VFs1599 * @pf: PF associated with VFs1600 */1601static int ice_calc_all_vfs_min_tx_rate(struct ice_pf *pf)1602{1603 struct ice_vf *vf;1604 unsigned int bkt;1605 int rate = 0;1606 1607 rcu_read_lock();1608 ice_for_each_vf_rcu(pf, bkt, vf)1609 rate += vf->min_tx_rate;1610 rcu_read_unlock();1611 1612 return rate;1613}1614 1615/**1616 * ice_min_tx_rate_oversubscribed - check if min Tx rate causes oversubscription1617 * @vf: VF trying to configure min_tx_rate1618 * @min_tx_rate: min Tx rate in Mbps1619 *1620 * Check if the min_tx_rate being passed in will cause oversubscription of total1621 * min_tx_rate based on the current link speed and all other VFs configured1622 * min_tx_rate1623 *1624 * Return true if the passed min_tx_rate would cause oversubscription, else1625 * return false1626 */1627static bool1628ice_min_tx_rate_oversubscribed(struct ice_vf *vf, int min_tx_rate)1629{1630 struct ice_vsi *vsi = ice_get_vf_vsi(vf);1631 int all_vfs_min_tx_rate;1632 int link_speed_mbps;1633 1634 if (WARN_ON(!vsi))1635 return false;1636 1637 link_speed_mbps = ice_get_link_speed_mbps(vsi);1638 all_vfs_min_tx_rate = ice_calc_all_vfs_min_tx_rate(vf->pf);1639 1640 /* this VF's previous rate is being overwritten */1641 all_vfs_min_tx_rate -= vf->min_tx_rate;1642 1643 if (all_vfs_min_tx_rate + min_tx_rate > link_speed_mbps) {1644 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",1645 min_tx_rate, vf->vf_id,1646 all_vfs_min_tx_rate + min_tx_rate - link_speed_mbps,1647 link_speed_mbps);1648 return true;1649 }1650 1651 return false;1652}1653 1654/**1655 * ice_set_vf_bw - set min/max VF bandwidth1656 * @netdev: network interface device structure1657 * @vf_id: VF identifier1658 * @min_tx_rate: Minimum Tx rate in Mbps1659 * @max_tx_rate: Maximum Tx rate in Mbps1660 */1661int1662ice_set_vf_bw(struct net_device *netdev, int vf_id, int min_tx_rate,1663 int max_tx_rate)1664{1665 struct ice_pf *pf = ice_netdev_to_pf(netdev);1666 struct ice_vsi *vsi;1667 struct device *dev;1668 struct ice_vf *vf;1669 int ret;1670 1671 dev = ice_pf_to_dev(pf);1672 1673 vf = ice_get_vf_by_id(pf, vf_id);1674 if (!vf)1675 return -EINVAL;1676 1677 ret = ice_check_vf_ready_for_cfg(vf);1678 if (ret)1679 goto out_put_vf;1680 1681 vsi = ice_get_vf_vsi(vf);1682 if (!vsi) {1683 ret = -EINVAL;1684 goto out_put_vf;1685 }1686 1687 if (min_tx_rate && ice_is_dcb_active(pf)) {1688 dev_err(dev, "DCB on PF is currently enabled. VF min Tx rate limiting not allowed on this PF.\n");1689 ret = -EOPNOTSUPP;1690 goto out_put_vf;1691 }1692 1693 if (ice_min_tx_rate_oversubscribed(vf, min_tx_rate)) {1694 ret = -EINVAL;1695 goto out_put_vf;1696 }1697 1698 if (vf->min_tx_rate != (unsigned int)min_tx_rate) {1699 ret = ice_set_min_bw_limit(vsi, (u64)min_tx_rate * 1000);1700 if (ret) {1701 dev_err(dev, "Unable to set min-tx-rate for VF %d\n",1702 vf->vf_id);1703 goto out_put_vf;1704 }1705 1706 vf->min_tx_rate = min_tx_rate;1707 }1708 1709 if (vf->max_tx_rate != (unsigned int)max_tx_rate) {1710 ret = ice_set_max_bw_limit(vsi, (u64)max_tx_rate * 1000);1711 if (ret) {1712 dev_err(dev, "Unable to set max-tx-rate for VF %d\n",1713 vf->vf_id);1714 goto out_put_vf;1715 }1716 1717 vf->max_tx_rate = max_tx_rate;1718 }1719 1720out_put_vf:1721 ice_put_vf(vf);1722 return ret;1723}1724 1725/**1726 * ice_get_vf_stats - populate some stats for the VF1727 * @netdev: the netdev of the PF1728 * @vf_id: the host OS identifier (0-255)1729 * @vf_stats: pointer to the OS memory to be initialized1730 */1731int ice_get_vf_stats(struct net_device *netdev, int vf_id,1732 struct ifla_vf_stats *vf_stats)1733{1734 struct ice_pf *pf = ice_netdev_to_pf(netdev);1735 struct ice_eth_stats *stats;1736 struct ice_vsi *vsi;1737 struct ice_vf *vf;1738 int ret;1739 1740 vf = ice_get_vf_by_id(pf, vf_id);1741 if (!vf)1742 return -EINVAL;1743 1744 ret = ice_check_vf_ready_for_cfg(vf);1745 if (ret)1746 goto out_put_vf;1747 1748 vsi = ice_get_vf_vsi(vf);1749 if (!vsi) {1750 ret = -EINVAL;1751 goto out_put_vf;1752 }1753 1754 ice_update_eth_stats(vsi);1755 stats = &vsi->eth_stats;1756 1757 memset(vf_stats, 0, sizeof(*vf_stats));1758 1759 vf_stats->rx_packets = stats->rx_unicast + stats->rx_broadcast +1760 stats->rx_multicast;1761 vf_stats->tx_packets = stats->tx_unicast + stats->tx_broadcast +1762 stats->tx_multicast;1763 vf_stats->rx_bytes = stats->rx_bytes;1764 vf_stats->tx_bytes = stats->tx_bytes;1765 vf_stats->broadcast = stats->rx_broadcast;1766 vf_stats->multicast = stats->rx_multicast;1767 vf_stats->rx_dropped = stats->rx_discards;1768 vf_stats->tx_dropped = stats->tx_discards;1769 1770out_put_vf:1771 ice_put_vf(vf);1772 return ret;1773}1774 1775/**1776 * ice_is_supported_port_vlan_proto - make sure the vlan_proto is supported1777 * @hw: hardware structure used to check the VLAN mode1778 * @vlan_proto: VLAN TPID being checked1779 *1780 * If the device is configured in Double VLAN Mode (DVM), then both ETH_P_8021Q1781 * and ETH_P_8021AD are supported. If the device is configured in Single VLAN1782 * Mode (SVM), then only ETH_P_8021Q is supported.1783 */1784static bool1785ice_is_supported_port_vlan_proto(struct ice_hw *hw, u16 vlan_proto)1786{1787 bool is_supported = false;1788 1789 switch (vlan_proto) {1790 case ETH_P_8021Q:1791 is_supported = true;1792 break;1793 case ETH_P_8021AD:1794 if (ice_is_dvm_ena(hw))1795 is_supported = true;1796 break;1797 }1798 1799 return is_supported;1800}1801 1802/**1803 * ice_set_vf_port_vlan1804 * @netdev: network interface device structure1805 * @vf_id: VF identifier1806 * @vlan_id: VLAN ID being set1807 * @qos: priority setting1808 * @vlan_proto: VLAN protocol1809 *1810 * program VF Port VLAN ID and/or QoS1811 */1812int1813ice_set_vf_port_vlan(struct net_device *netdev, int vf_id, u16 vlan_id, u8 qos,1814 __be16 vlan_proto)1815{1816 struct ice_pf *pf = ice_netdev_to_pf(netdev);1817 u16 local_vlan_proto = ntohs(vlan_proto);1818 struct device *dev;1819 struct ice_vf *vf;1820 int ret;1821 1822 dev = ice_pf_to_dev(pf);1823 1824 if (vlan_id >= VLAN_N_VID || qos > 7) {1825 dev_err(dev, "Invalid Port VLAN parameters for VF %d, ID %d, QoS %d\n",1826 vf_id, vlan_id, qos);1827 return -EINVAL;1828 }1829 1830 if (!ice_is_supported_port_vlan_proto(&pf->hw, local_vlan_proto)) {1831 dev_err(dev, "VF VLAN protocol 0x%04x is not supported\n",1832 local_vlan_proto);1833 return -EPROTONOSUPPORT;1834 }1835 1836 vf = ice_get_vf_by_id(pf, vf_id);1837 if (!vf)1838 return -EINVAL;1839 1840 ret = ice_check_vf_ready_for_cfg(vf);1841 if (ret)1842 goto out_put_vf;1843 1844 if (ice_vf_get_port_vlan_prio(vf) == qos &&1845 ice_vf_get_port_vlan_tpid(vf) == local_vlan_proto &&1846 ice_vf_get_port_vlan_id(vf) == vlan_id) {1847 /* duplicate request, so just return success */1848 dev_dbg(dev, "Duplicate port VLAN %u, QoS %u, TPID 0x%04x request\n",1849 vlan_id, qos, local_vlan_proto);1850 ret = 0;1851 goto out_put_vf;1852 }1853 1854 mutex_lock(&vf->cfg_lock);1855 1856 vf->port_vlan_info = ICE_VLAN(local_vlan_proto, vlan_id, qos);1857 if (ice_vf_is_port_vlan_ena(vf))1858 dev_info(dev, "Setting VLAN %u, QoS %u, TPID 0x%04x on VF %d\n",1859 vlan_id, qos, local_vlan_proto, vf_id);1860 else1861 dev_info(dev, "Clearing port VLAN on VF %d\n", vf_id);1862 1863 ice_reset_vf(vf, ICE_VF_RESET_NOTIFY);1864 mutex_unlock(&vf->cfg_lock);1865 1866out_put_vf:1867 ice_put_vf(vf);1868 return ret;1869}1870 1871/**1872 * ice_print_vf_rx_mdd_event - print VF Rx malicious driver detect event1873 * @vf: pointer to the VF structure1874 */1875void ice_print_vf_rx_mdd_event(struct ice_vf *vf)1876{1877 struct ice_pf *pf = vf->pf;1878 struct device *dev;1879 1880 dev = ice_pf_to_dev(pf);1881 1882 dev_info(dev, "%d Rx Malicious Driver Detection events detected on PF %d VF %d MAC %pM. mdd-auto-reset-vfs=%s\n",1883 vf->mdd_rx_events.count, pf->hw.pf_id, vf->vf_id,1884 vf->dev_lan_addr,1885 test_bit(ICE_FLAG_MDD_AUTO_RESET_VF, pf->flags)1886 ? "on" : "off");1887}1888 1889/**1890 * ice_print_vf_tx_mdd_event - print VF Tx malicious driver detect event1891 * @vf: pointer to the VF structure1892 */1893void ice_print_vf_tx_mdd_event(struct ice_vf *vf)1894{1895 struct ice_pf *pf = vf->pf;1896 struct device *dev;1897 1898 dev = ice_pf_to_dev(pf);1899 1900 dev_info(dev, "%d Tx Malicious Driver Detection events detected on PF %d VF %d MAC %pM. mdd-auto-reset-vfs=%s\n",1901 vf->mdd_tx_events.count, pf->hw.pf_id, vf->vf_id,1902 vf->dev_lan_addr,1903 test_bit(ICE_FLAG_MDD_AUTO_RESET_VF, pf->flags)1904 ? "on" : "off");1905}1906 1907/**1908 * ice_print_vfs_mdd_events - print VFs malicious driver detect event1909 * @pf: pointer to the PF structure1910 *1911 * Called from ice_handle_mdd_event to rate limit and print VFs MDD events.1912 */1913void ice_print_vfs_mdd_events(struct ice_pf *pf)1914{1915 struct ice_vf *vf;1916 unsigned int bkt;1917 1918 /* check that there are pending MDD events to print */1919 if (!test_and_clear_bit(ICE_MDD_VF_PRINT_PENDING, pf->state))1920 return;1921 1922 /* VF MDD event logs are rate limited to one second intervals */1923 if (time_is_after_jiffies(pf->vfs.last_printed_mdd_jiffies + HZ * 1))1924 return;1925 1926 pf->vfs.last_printed_mdd_jiffies = jiffies;1927 1928 mutex_lock(&pf->vfs.table_lock);1929 ice_for_each_vf(pf, bkt, vf) {1930 /* only print Rx MDD event message if there are new events */1931 if (vf->mdd_rx_events.count != vf->mdd_rx_events.last_printed) {1932 vf->mdd_rx_events.last_printed =1933 vf->mdd_rx_events.count;1934 ice_print_vf_rx_mdd_event(vf);1935 }1936 1937 /* only print Tx MDD event message if there are new events */1938 if (vf->mdd_tx_events.count != vf->mdd_tx_events.last_printed) {1939 vf->mdd_tx_events.last_printed =1940 vf->mdd_tx_events.count;1941 ice_print_vf_tx_mdd_event(vf);1942 }1943 }1944 mutex_unlock(&pf->vfs.table_lock);1945}1946 1947/**1948 * ice_restore_all_vfs_msi_state - restore VF MSI state after PF FLR1949 * @pf: pointer to the PF structure1950 *1951 * Called when recovering from a PF FLR to restore interrupt capability to1952 * the VFs.1953 */1954void ice_restore_all_vfs_msi_state(struct ice_pf *pf)1955{1956 struct ice_vf *vf;1957 u32 bkt;1958 1959 ice_for_each_vf(pf, bkt, vf)1960 pci_restore_msi_state(vf->vfdev);1961}1962