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0001 // SPDX-License-Identifier: GPL-2.0
0002 /* Copyright (c) 2018, Intel Corporation. */
0003 
0004 #include "ice.h"
0005 #include "ice_vf_lib_private.h"
0006 #include "ice_base.h"
0007 #include "ice_lib.h"
0008 #include "ice_fltr.h"
0009 #include "ice_dcb_lib.h"
0010 #include "ice_flow.h"
0011 #include "ice_eswitch.h"
0012 #include "ice_virtchnl_allowlist.h"
0013 #include "ice_flex_pipe.h"
0014 #include "ice_vf_vsi_vlan_ops.h"
0015 #include "ice_vlan.h"
0016 
0017 /**
0018  * ice_free_vf_entries - Free all VF entries from the hash table
0019  * @pf: pointer to the PF structure
0020  *
0021  * Iterate over the VF hash table, removing and releasing all VF entries.
0022  * Called during VF teardown or as cleanup during failed VF initialization.
0023  */
0024 static void ice_free_vf_entries(struct ice_pf *pf)
0025 {
0026     struct ice_vfs *vfs = &pf->vfs;
0027     struct hlist_node *tmp;
0028     struct ice_vf *vf;
0029     unsigned int bkt;
0030 
0031     /* Remove all VFs from the hash table and release their main
0032      * reference. Once all references to the VF are dropped, ice_put_vf()
0033      * will call ice_release_vf which will remove the VF memory.
0034      */
0035     lockdep_assert_held(&vfs->table_lock);
0036 
0037     hash_for_each_safe(vfs->table, bkt, tmp, vf, entry) {
0038         hash_del_rcu(&vf->entry);
0039         ice_put_vf(vf);
0040     }
0041 }
0042 
0043 /**
0044  * ice_vf_vsi_release - invalidate the VF's VSI after freeing it
0045  * @vf: invalidate this VF's VSI after freeing it
0046  */
0047 static void ice_vf_vsi_release(struct ice_vf *vf)
0048 {
0049     struct ice_vsi *vsi = ice_get_vf_vsi(vf);
0050 
0051     if (WARN_ON(!vsi))
0052         return;
0053 
0054     ice_vsi_release(vsi);
0055     ice_vf_invalidate_vsi(vf);
0056 }
0057 
0058 /**
0059  * ice_free_vf_res - Free a VF's resources
0060  * @vf: pointer to the VF info
0061  */
0062 static void ice_free_vf_res(struct ice_vf *vf)
0063 {
0064     struct ice_pf *pf = vf->pf;
0065     int i, last_vector_idx;
0066 
0067     /* First, disable VF's configuration API to prevent OS from
0068      * accessing the VF's VSI after it's freed or invalidated.
0069      */
0070     clear_bit(ICE_VF_STATE_INIT, vf->vf_states);
0071     ice_vf_fdir_exit(vf);
0072     /* free VF control VSI */
0073     if (vf->ctrl_vsi_idx != ICE_NO_VSI)
0074         ice_vf_ctrl_vsi_release(vf);
0075 
0076     /* free VSI and disconnect it from the parent uplink */
0077     if (vf->lan_vsi_idx != ICE_NO_VSI) {
0078         ice_vf_vsi_release(vf);
0079         vf->num_mac = 0;
0080     }
0081 
0082     last_vector_idx = vf->first_vector_idx + pf->vfs.num_msix_per - 1;
0083 
0084     /* clear VF MDD event information */
0085     memset(&vf->mdd_tx_events, 0, sizeof(vf->mdd_tx_events));
0086     memset(&vf->mdd_rx_events, 0, sizeof(vf->mdd_rx_events));
0087 
0088     /* Disable interrupts so that VF starts in a known state */
0089     for (i = vf->first_vector_idx; i <= last_vector_idx; i++) {
0090         wr32(&pf->hw, GLINT_DYN_CTL(i), GLINT_DYN_CTL_CLEARPBA_M);
0091         ice_flush(&pf->hw);
0092     }
0093     /* reset some of the state variables keeping track of the resources */
0094     clear_bit(ICE_VF_STATE_MC_PROMISC, vf->vf_states);
0095     clear_bit(ICE_VF_STATE_UC_PROMISC, vf->vf_states);
0096 }
0097 
0098 /**
0099  * ice_dis_vf_mappings
0100  * @vf: pointer to the VF structure
0101  */
0102 static void ice_dis_vf_mappings(struct ice_vf *vf)
0103 {
0104     struct ice_pf *pf = vf->pf;
0105     struct ice_vsi *vsi;
0106     struct device *dev;
0107     int first, last, v;
0108     struct ice_hw *hw;
0109 
0110     hw = &pf->hw;
0111     vsi = ice_get_vf_vsi(vf);
0112     if (WARN_ON(!vsi))
0113         return;
0114 
0115     dev = ice_pf_to_dev(pf);
0116     wr32(hw, VPINT_ALLOC(vf->vf_id), 0);
0117     wr32(hw, VPINT_ALLOC_PCI(vf->vf_id), 0);
0118 
0119     first = vf->first_vector_idx;
0120     last = first + pf->vfs.num_msix_per - 1;
0121     for (v = first; v <= last; v++) {
0122         u32 reg;
0123 
0124         reg = (((1 << GLINT_VECT2FUNC_IS_PF_S) &
0125             GLINT_VECT2FUNC_IS_PF_M) |
0126                ((hw->pf_id << GLINT_VECT2FUNC_PF_NUM_S) &
0127             GLINT_VECT2FUNC_PF_NUM_M));
0128         wr32(hw, GLINT_VECT2FUNC(v), reg);
0129     }
0130 
0131     if (vsi->tx_mapping_mode == ICE_VSI_MAP_CONTIG)
0132         wr32(hw, VPLAN_TX_QBASE(vf->vf_id), 0);
0133     else
0134         dev_err(dev, "Scattered mode for VF Tx queues is not yet implemented\n");
0135 
0136     if (vsi->rx_mapping_mode == ICE_VSI_MAP_CONTIG)
0137         wr32(hw, VPLAN_RX_QBASE(vf->vf_id), 0);
0138     else
0139         dev_err(dev, "Scattered mode for VF Rx queues is not yet implemented\n");
0140 }
0141 
0142 /**
0143  * ice_sriov_free_msix_res - Reset/free any used MSIX resources
0144  * @pf: pointer to the PF structure
0145  *
0146  * Since no MSIX entries are taken from the pf->irq_tracker then just clear
0147  * the pf->sriov_base_vector.
0148  *
0149  * Returns 0 on success, and -EINVAL on error.
0150  */
0151 static int ice_sriov_free_msix_res(struct ice_pf *pf)
0152 {
0153     struct ice_res_tracker *res;
0154 
0155     if (!pf)
0156         return -EINVAL;
0157 
0158     res = pf->irq_tracker;
0159     if (!res)
0160         return -EINVAL;
0161 
0162     /* give back irq_tracker resources used */
0163     WARN_ON(pf->sriov_base_vector < res->num_entries);
0164 
0165     pf->sriov_base_vector = 0;
0166 
0167     return 0;
0168 }
0169 
0170 /**
0171  * ice_free_vfs - Free all VFs
0172  * @pf: pointer to the PF structure
0173  */
0174 void ice_free_vfs(struct ice_pf *pf)
0175 {
0176     struct device *dev = ice_pf_to_dev(pf);
0177     struct ice_vfs *vfs = &pf->vfs;
0178     struct ice_hw *hw = &pf->hw;
0179     struct ice_vf *vf;
0180     unsigned int bkt;
0181 
0182     if (!ice_has_vfs(pf))
0183         return;
0184 
0185     while (test_and_set_bit(ICE_VF_DIS, pf->state))
0186         usleep_range(1000, 2000);
0187 
0188     /* Disable IOV before freeing resources. This lets any VF drivers
0189      * running in the host get themselves cleaned up before we yank
0190      * the carpet out from underneath their feet.
0191      */
0192     if (!pci_vfs_assigned(pf->pdev))
0193         pci_disable_sriov(pf->pdev);
0194     else
0195         dev_warn(dev, "VFs are assigned - not disabling SR-IOV\n");
0196 
0197     mutex_lock(&vfs->table_lock);
0198 
0199     ice_eswitch_release(pf);
0200 
0201     ice_for_each_vf(pf, bkt, vf) {
0202         mutex_lock(&vf->cfg_lock);
0203 
0204         ice_dis_vf_qs(vf);
0205 
0206         if (test_bit(ICE_VF_STATE_INIT, vf->vf_states)) {
0207             /* disable VF qp mappings and set VF disable state */
0208             ice_dis_vf_mappings(vf);
0209             set_bit(ICE_VF_STATE_DIS, vf->vf_states);
0210             ice_free_vf_res(vf);
0211         }
0212 
0213         if (!pci_vfs_assigned(pf->pdev)) {
0214             u32 reg_idx, bit_idx;
0215 
0216             reg_idx = (hw->func_caps.vf_base_id + vf->vf_id) / 32;
0217             bit_idx = (hw->func_caps.vf_base_id + vf->vf_id) % 32;
0218             wr32(hw, GLGEN_VFLRSTAT(reg_idx), BIT(bit_idx));
0219         }
0220 
0221         /* clear malicious info since the VF is getting released */
0222         if (ice_mbx_clear_malvf(&hw->mbx_snapshot, pf->vfs.malvfs,
0223                     ICE_MAX_SRIOV_VFS, vf->vf_id))
0224             dev_dbg(dev, "failed to clear malicious VF state for VF %u\n",
0225                 vf->vf_id);
0226 
0227         mutex_unlock(&vf->cfg_lock);
0228     }
0229 
0230     if (ice_sriov_free_msix_res(pf))
0231         dev_err(dev, "Failed to free MSIX resources used by SR-IOV\n");
0232 
0233     vfs->num_qps_per = 0;
0234     ice_free_vf_entries(pf);
0235 
0236     mutex_unlock(&vfs->table_lock);
0237 
0238     clear_bit(ICE_VF_DIS, pf->state);
0239     clear_bit(ICE_FLAG_SRIOV_ENA, pf->flags);
0240 }
0241 
0242 /**
0243  * ice_vf_vsi_setup - Set up a VF VSI
0244  * @vf: VF to setup VSI for
0245  *
0246  * Returns pointer to the successfully allocated VSI struct on success,
0247  * otherwise returns NULL on failure.
0248  */
0249 static struct ice_vsi *ice_vf_vsi_setup(struct ice_vf *vf)
0250 {
0251     struct ice_port_info *pi = ice_vf_get_port_info(vf);
0252     struct ice_pf *pf = vf->pf;
0253     struct ice_vsi *vsi;
0254 
0255     vsi = ice_vsi_setup(pf, pi, ICE_VSI_VF, vf, NULL);
0256 
0257     if (!vsi) {
0258         dev_err(ice_pf_to_dev(pf), "Failed to create VF VSI\n");
0259         ice_vf_invalidate_vsi(vf);
0260         return NULL;
0261     }
0262 
0263     vf->lan_vsi_idx = vsi->idx;
0264     vf->lan_vsi_num = vsi->vsi_num;
0265 
0266     return vsi;
0267 }
0268 
0269 /**
0270  * ice_calc_vf_first_vector_idx - Calculate MSIX vector index in the PF space
0271  * @pf: pointer to PF structure
0272  * @vf: pointer to VF that the first MSIX vector index is being calculated for
0273  *
0274  * This returns the first MSIX vector index in PF space that is used by this VF.
0275  * This index is used when accessing PF relative registers such as
0276  * GLINT_VECT2FUNC and GLINT_DYN_CTL.
0277  * This will always be the OICR index in the AVF driver so any functionality
0278  * using vf->first_vector_idx for queue configuration will have to increment by
0279  * 1 to avoid meddling with the OICR index.
0280  */
0281 static int ice_calc_vf_first_vector_idx(struct ice_pf *pf, struct ice_vf *vf)
0282 {
0283     return pf->sriov_base_vector + vf->vf_id * pf->vfs.num_msix_per;
0284 }
0285 
0286 /**
0287  * ice_ena_vf_msix_mappings - enable VF MSIX mappings in hardware
0288  * @vf: VF to enable MSIX mappings for
0289  *
0290  * Some of the registers need to be indexed/configured using hardware global
0291  * device values and other registers need 0-based values, which represent PF
0292  * based values.
0293  */
0294 static void ice_ena_vf_msix_mappings(struct ice_vf *vf)
0295 {
0296     int device_based_first_msix, device_based_last_msix;
0297     int pf_based_first_msix, pf_based_last_msix, v;
0298     struct ice_pf *pf = vf->pf;
0299     int device_based_vf_id;
0300     struct ice_hw *hw;
0301     u32 reg;
0302 
0303     hw = &pf->hw;
0304     pf_based_first_msix = vf->first_vector_idx;
0305     pf_based_last_msix = (pf_based_first_msix + pf->vfs.num_msix_per) - 1;
0306 
0307     device_based_first_msix = pf_based_first_msix +
0308         pf->hw.func_caps.common_cap.msix_vector_first_id;
0309     device_based_last_msix =
0310         (device_based_first_msix + pf->vfs.num_msix_per) - 1;
0311     device_based_vf_id = vf->vf_id + hw->func_caps.vf_base_id;
0312 
0313     reg = (((device_based_first_msix << VPINT_ALLOC_FIRST_S) &
0314         VPINT_ALLOC_FIRST_M) |
0315            ((device_based_last_msix << VPINT_ALLOC_LAST_S) &
0316         VPINT_ALLOC_LAST_M) | VPINT_ALLOC_VALID_M);
0317     wr32(hw, VPINT_ALLOC(vf->vf_id), reg);
0318 
0319     reg = (((device_based_first_msix << VPINT_ALLOC_PCI_FIRST_S)
0320          & VPINT_ALLOC_PCI_FIRST_M) |
0321            ((device_based_last_msix << VPINT_ALLOC_PCI_LAST_S) &
0322         VPINT_ALLOC_PCI_LAST_M) | VPINT_ALLOC_PCI_VALID_M);
0323     wr32(hw, VPINT_ALLOC_PCI(vf->vf_id), reg);
0324 
0325     /* map the interrupts to its functions */
0326     for (v = pf_based_first_msix; v <= pf_based_last_msix; v++) {
0327         reg = (((device_based_vf_id << GLINT_VECT2FUNC_VF_NUM_S) &
0328             GLINT_VECT2FUNC_VF_NUM_M) |
0329                ((hw->pf_id << GLINT_VECT2FUNC_PF_NUM_S) &
0330             GLINT_VECT2FUNC_PF_NUM_M));
0331         wr32(hw, GLINT_VECT2FUNC(v), reg);
0332     }
0333 
0334     /* Map mailbox interrupt to VF MSI-X vector 0 */
0335     wr32(hw, VPINT_MBX_CTL(device_based_vf_id), VPINT_MBX_CTL_CAUSE_ENA_M);
0336 }
0337 
0338 /**
0339  * ice_ena_vf_q_mappings - enable Rx/Tx queue mappings for a VF
0340  * @vf: VF to enable the mappings for
0341  * @max_txq: max Tx queues allowed on the VF's VSI
0342  * @max_rxq: max Rx queues allowed on the VF's VSI
0343  */
0344 static void ice_ena_vf_q_mappings(struct ice_vf *vf, u16 max_txq, u16 max_rxq)
0345 {
0346     struct device *dev = ice_pf_to_dev(vf->pf);
0347     struct ice_vsi *vsi = ice_get_vf_vsi(vf);
0348     struct ice_hw *hw = &vf->pf->hw;
0349     u32 reg;
0350 
0351     if (WARN_ON(!vsi))
0352         return;
0353 
0354     /* set regardless of mapping mode */
0355     wr32(hw, VPLAN_TXQ_MAPENA(vf->vf_id), VPLAN_TXQ_MAPENA_TX_ENA_M);
0356 
0357     /* VF Tx queues allocation */
0358     if (vsi->tx_mapping_mode == ICE_VSI_MAP_CONTIG) {
0359         /* set the VF PF Tx queue range
0360          * VFNUMQ value should be set to (number of queues - 1). A value
0361          * of 0 means 1 queue and a value of 255 means 256 queues
0362          */
0363         reg = (((vsi->txq_map[0] << VPLAN_TX_QBASE_VFFIRSTQ_S) &
0364             VPLAN_TX_QBASE_VFFIRSTQ_M) |
0365                (((max_txq - 1) << VPLAN_TX_QBASE_VFNUMQ_S) &
0366             VPLAN_TX_QBASE_VFNUMQ_M));
0367         wr32(hw, VPLAN_TX_QBASE(vf->vf_id), reg);
0368     } else {
0369         dev_err(dev, "Scattered mode for VF Tx queues is not yet implemented\n");
0370     }
0371 
0372     /* set regardless of mapping mode */
0373     wr32(hw, VPLAN_RXQ_MAPENA(vf->vf_id), VPLAN_RXQ_MAPENA_RX_ENA_M);
0374 
0375     /* VF Rx queues allocation */
0376     if (vsi->rx_mapping_mode == ICE_VSI_MAP_CONTIG) {
0377         /* set the VF PF Rx queue range
0378          * VFNUMQ value should be set to (number of queues - 1). A value
0379          * of 0 means 1 queue and a value of 255 means 256 queues
0380          */
0381         reg = (((vsi->rxq_map[0] << VPLAN_RX_QBASE_VFFIRSTQ_S) &
0382             VPLAN_RX_QBASE_VFFIRSTQ_M) |
0383                (((max_rxq - 1) << VPLAN_RX_QBASE_VFNUMQ_S) &
0384             VPLAN_RX_QBASE_VFNUMQ_M));
0385         wr32(hw, VPLAN_RX_QBASE(vf->vf_id), reg);
0386     } else {
0387         dev_err(dev, "Scattered mode for VF Rx queues is not yet implemented\n");
0388     }
0389 }
0390 
0391 /**
0392  * ice_ena_vf_mappings - enable VF MSIX and queue mapping
0393  * @vf: pointer to the VF structure
0394  */
0395 static void ice_ena_vf_mappings(struct ice_vf *vf)
0396 {
0397     struct ice_vsi *vsi = ice_get_vf_vsi(vf);
0398 
0399     if (WARN_ON(!vsi))
0400         return;
0401 
0402     ice_ena_vf_msix_mappings(vf);
0403     ice_ena_vf_q_mappings(vf, vsi->alloc_txq, vsi->alloc_rxq);
0404 }
0405 
0406 /**
0407  * ice_calc_vf_reg_idx - Calculate the VF's register index in the PF space
0408  * @vf: VF to calculate the register index for
0409  * @q_vector: a q_vector associated to the VF
0410  */
0411 int ice_calc_vf_reg_idx(struct ice_vf *vf, struct ice_q_vector *q_vector)
0412 {
0413     struct ice_pf *pf;
0414 
0415     if (!vf || !q_vector)
0416         return -EINVAL;
0417 
0418     pf = vf->pf;
0419 
0420     /* always add one to account for the OICR being the first MSIX */
0421     return pf->sriov_base_vector + pf->vfs.num_msix_per * vf->vf_id +
0422         q_vector->v_idx + 1;
0423 }
0424 
0425 /**
0426  * ice_get_max_valid_res_idx - Get the max valid resource index
0427  * @res: pointer to the resource to find the max valid index for
0428  *
0429  * Start from the end of the ice_res_tracker and return right when we find the
0430  * first res->list entry with the ICE_RES_VALID_BIT set. This function is only
0431  * valid for SR-IOV because it is the only consumer that manipulates the
0432  * res->end and this is always called when res->end is set to res->num_entries.
0433  */
0434 static int ice_get_max_valid_res_idx(struct ice_res_tracker *res)
0435 {
0436     int i;
0437 
0438     if (!res)
0439         return -EINVAL;
0440 
0441     for (i = res->num_entries - 1; i >= 0; i--)
0442         if (res->list[i] & ICE_RES_VALID_BIT)
0443             return i;
0444 
0445     return 0;
0446 }
0447 
0448 /**
0449  * ice_sriov_set_msix_res - Set any used MSIX resources
0450  * @pf: pointer to PF structure
0451  * @num_msix_needed: number of MSIX vectors needed for all SR-IOV VFs
0452  *
0453  * This function allows SR-IOV resources to be taken from the end of the PF's
0454  * allowed HW MSIX vectors so that the irq_tracker will not be affected. We
0455  * just set the pf->sriov_base_vector and return success.
0456  *
0457  * If there are not enough resources available, return an error. This should
0458  * always be caught by ice_set_per_vf_res().
0459  *
0460  * Return 0 on success, and -EINVAL when there are not enough MSIX vectors
0461  * in the PF's space available for SR-IOV.
0462  */
0463 static int ice_sriov_set_msix_res(struct ice_pf *pf, u16 num_msix_needed)
0464 {
0465     u16 total_vectors = pf->hw.func_caps.common_cap.num_msix_vectors;
0466     int vectors_used = pf->irq_tracker->num_entries;
0467     int sriov_base_vector;
0468 
0469     sriov_base_vector = total_vectors - num_msix_needed;
0470 
0471     /* make sure we only grab irq_tracker entries from the list end and
0472      * that we have enough available MSIX vectors
0473      */
0474     if (sriov_base_vector < vectors_used)
0475         return -EINVAL;
0476 
0477     pf->sriov_base_vector = sriov_base_vector;
0478 
0479     return 0;
0480 }
0481 
0482 /**
0483  * ice_set_per_vf_res - check if vectors and queues are available
0484  * @pf: pointer to the PF structure
0485  * @num_vfs: the number of SR-IOV VFs being configured
0486  *
0487  * First, determine HW interrupts from common pool. If we allocate fewer VFs, we
0488  * get more vectors and can enable more queues per VF. Note that this does not
0489  * grab any vectors from the SW pool already allocated. Also note, that all
0490  * vector counts include one for each VF's miscellaneous interrupt vector
0491  * (i.e. OICR).
0492  *
0493  * Minimum VFs - 2 vectors, 1 queue pair
0494  * Small VFs - 5 vectors, 4 queue pairs
0495  * Medium VFs - 17 vectors, 16 queue pairs
0496  *
0497  * Second, determine number of queue pairs per VF by starting with a pre-defined
0498  * maximum each VF supports. If this is not possible, then we adjust based on
0499  * queue pairs available on the device.
0500  *
0501  * Lastly, set queue and MSI-X VF variables tracked by the PF so it can be used
0502  * by each VF during VF initialization and reset.
0503  */
0504 static int ice_set_per_vf_res(struct ice_pf *pf, u16 num_vfs)
0505 {
0506     int max_valid_res_idx = ice_get_max_valid_res_idx(pf->irq_tracker);
0507     u16 num_msix_per_vf, num_txq, num_rxq, avail_qs;
0508     int msix_avail_per_vf, msix_avail_for_sriov;
0509     struct device *dev = ice_pf_to_dev(pf);
0510     int err;
0511 
0512     lockdep_assert_held(&pf->vfs.table_lock);
0513 
0514     if (!num_vfs)
0515         return -EINVAL;
0516 
0517     if (max_valid_res_idx < 0)
0518         return -ENOSPC;
0519 
0520     /* determine MSI-X resources per VF */
0521     msix_avail_for_sriov = pf->hw.func_caps.common_cap.num_msix_vectors -
0522         pf->irq_tracker->num_entries;
0523     msix_avail_per_vf = msix_avail_for_sriov / num_vfs;
0524     if (msix_avail_per_vf >= ICE_NUM_VF_MSIX_MED) {
0525         num_msix_per_vf = ICE_NUM_VF_MSIX_MED;
0526     } else if (msix_avail_per_vf >= ICE_NUM_VF_MSIX_SMALL) {
0527         num_msix_per_vf = ICE_NUM_VF_MSIX_SMALL;
0528     } else if (msix_avail_per_vf >= ICE_NUM_VF_MSIX_MULTIQ_MIN) {
0529         num_msix_per_vf = ICE_NUM_VF_MSIX_MULTIQ_MIN;
0530     } else if (msix_avail_per_vf >= ICE_MIN_INTR_PER_VF) {
0531         num_msix_per_vf = ICE_MIN_INTR_PER_VF;
0532     } else {
0533         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",
0534             msix_avail_for_sriov, ICE_MIN_INTR_PER_VF,
0535             num_vfs);
0536         return -ENOSPC;
0537     }
0538 
0539     num_txq = min_t(u16, num_msix_per_vf - ICE_NONQ_VECS_VF,
0540             ICE_MAX_RSS_QS_PER_VF);
0541     avail_qs = ice_get_avail_txq_count(pf) / num_vfs;
0542     if (!avail_qs)
0543         num_txq = 0;
0544     else if (num_txq > avail_qs)
0545         num_txq = rounddown_pow_of_two(avail_qs);
0546 
0547     num_rxq = min_t(u16, num_msix_per_vf - ICE_NONQ_VECS_VF,
0548             ICE_MAX_RSS_QS_PER_VF);
0549     avail_qs = ice_get_avail_rxq_count(pf) / num_vfs;
0550     if (!avail_qs)
0551         num_rxq = 0;
0552     else if (num_rxq > avail_qs)
0553         num_rxq = rounddown_pow_of_two(avail_qs);
0554 
0555     if (num_txq < ICE_MIN_QS_PER_VF || num_rxq < ICE_MIN_QS_PER_VF) {
0556         dev_err(dev, "Not enough queues to support minimum of %d queue pairs per VF for %d VFs\n",
0557             ICE_MIN_QS_PER_VF, num_vfs);
0558         return -ENOSPC;
0559     }
0560 
0561     err = ice_sriov_set_msix_res(pf, num_msix_per_vf * num_vfs);
0562     if (err) {
0563         dev_err(dev, "Unable to set MSI-X resources for %d VFs, err %d\n",
0564             num_vfs, err);
0565         return err;
0566     }
0567 
0568     /* only allow equal Tx/Rx queue count (i.e. queue pairs) */
0569     pf->vfs.num_qps_per = min_t(int, num_txq, num_rxq);
0570     pf->vfs.num_msix_per = num_msix_per_vf;
0571     dev_info(dev, "Enabling %d VFs with %d vectors and %d queues per VF\n",
0572          num_vfs, pf->vfs.num_msix_per, pf->vfs.num_qps_per);
0573 
0574     return 0;
0575 }
0576 
0577 /**
0578  * ice_init_vf_vsi_res - initialize/setup VF VSI resources
0579  * @vf: VF to initialize/setup the VSI for
0580  *
0581  * This function creates a VSI for the VF, adds a VLAN 0 filter, and sets up the
0582  * VF VSI's broadcast filter and is only used during initial VF creation.
0583  */
0584 static int ice_init_vf_vsi_res(struct ice_vf *vf)
0585 {
0586     struct ice_vsi_vlan_ops *vlan_ops;
0587     struct ice_pf *pf = vf->pf;
0588     u8 broadcast[ETH_ALEN];
0589     struct ice_vsi *vsi;
0590     struct device *dev;
0591     int err;
0592 
0593     vf->first_vector_idx = ice_calc_vf_first_vector_idx(pf, vf);
0594 
0595     dev = ice_pf_to_dev(pf);
0596     vsi = ice_vf_vsi_setup(vf);
0597     if (!vsi)
0598         return -ENOMEM;
0599 
0600     err = ice_vsi_add_vlan_zero(vsi);
0601     if (err) {
0602         dev_warn(dev, "Failed to add VLAN 0 filter for VF %d\n",
0603              vf->vf_id);
0604         goto release_vsi;
0605     }
0606 
0607     vlan_ops = ice_get_compat_vsi_vlan_ops(vsi);
0608     err = vlan_ops->ena_rx_filtering(vsi);
0609     if (err) {
0610         dev_warn(dev, "Failed to enable Rx VLAN filtering for VF %d\n",
0611              vf->vf_id);
0612         goto release_vsi;
0613     }
0614 
0615     eth_broadcast_addr(broadcast);
0616     err = ice_fltr_add_mac(vsi, broadcast, ICE_FWD_TO_VSI);
0617     if (err) {
0618         dev_err(dev, "Failed to add broadcast MAC filter for VF %d, error %d\n",
0619             vf->vf_id, err);
0620         goto release_vsi;
0621     }
0622 
0623     err = ice_vsi_apply_spoofchk(vsi, vf->spoofchk);
0624     if (err) {
0625         dev_warn(dev, "Failed to initialize spoofchk setting for VF %d\n",
0626              vf->vf_id);
0627         goto release_vsi;
0628     }
0629 
0630     vf->num_mac = 1;
0631 
0632     return 0;
0633 
0634 release_vsi:
0635     ice_vf_vsi_release(vf);
0636     return err;
0637 }
0638 
0639 /**
0640  * ice_start_vfs - start VFs so they are ready to be used by SR-IOV
0641  * @pf: PF the VFs are associated with
0642  */
0643 static int ice_start_vfs(struct ice_pf *pf)
0644 {
0645     struct ice_hw *hw = &pf->hw;
0646     unsigned int bkt, it_cnt;
0647     struct ice_vf *vf;
0648     int retval;
0649 
0650     lockdep_assert_held(&pf->vfs.table_lock);
0651 
0652     it_cnt = 0;
0653     ice_for_each_vf(pf, bkt, vf) {
0654         vf->vf_ops->clear_reset_trigger(vf);
0655 
0656         retval = ice_init_vf_vsi_res(vf);
0657         if (retval) {
0658             dev_err(ice_pf_to_dev(pf), "Failed to initialize VSI resources for VF %d, error %d\n",
0659                 vf->vf_id, retval);
0660             goto teardown;
0661         }
0662 
0663         set_bit(ICE_VF_STATE_INIT, vf->vf_states);
0664         ice_ena_vf_mappings(vf);
0665         wr32(hw, VFGEN_RSTAT(vf->vf_id), VIRTCHNL_VFR_VFACTIVE);
0666         it_cnt++;
0667     }
0668 
0669     ice_flush(hw);
0670     return 0;
0671 
0672 teardown:
0673     ice_for_each_vf(pf, bkt, vf) {
0674         if (it_cnt == 0)
0675             break;
0676 
0677         ice_dis_vf_mappings(vf);
0678         ice_vf_vsi_release(vf);
0679         it_cnt--;
0680     }
0681 
0682     return retval;
0683 }
0684 
0685 /**
0686  * ice_sriov_free_vf - Free VF memory after all references are dropped
0687  * @vf: pointer to VF to free
0688  *
0689  * Called by ice_put_vf through ice_release_vf once the last reference to a VF
0690  * structure has been dropped.
0691  */
0692 static void ice_sriov_free_vf(struct ice_vf *vf)
0693 {
0694     mutex_destroy(&vf->cfg_lock);
0695 
0696     kfree_rcu(vf, rcu);
0697 }
0698 
0699 /**
0700  * ice_sriov_clear_mbx_register - clears SRIOV VF's mailbox registers
0701  * @vf: the vf to configure
0702  */
0703 static void ice_sriov_clear_mbx_register(struct ice_vf *vf)
0704 {
0705     struct ice_pf *pf = vf->pf;
0706 
0707     wr32(&pf->hw, VF_MBX_ARQLEN(vf->vf_id), 0);
0708     wr32(&pf->hw, VF_MBX_ATQLEN(vf->vf_id), 0);
0709 }
0710 
0711 /**
0712  * ice_sriov_trigger_reset_register - trigger VF reset for SRIOV VF
0713  * @vf: pointer to VF structure
0714  * @is_vflr: true if reset occurred due to VFLR
0715  *
0716  * Trigger and cleanup after a VF reset for a SR-IOV VF.
0717  */
0718 static void ice_sriov_trigger_reset_register(struct ice_vf *vf, bool is_vflr)
0719 {
0720     struct ice_pf *pf = vf->pf;
0721     u32 reg, reg_idx, bit_idx;
0722     unsigned int vf_abs_id, i;
0723     struct device *dev;
0724     struct ice_hw *hw;
0725 
0726     dev = ice_pf_to_dev(pf);
0727     hw = &pf->hw;
0728     vf_abs_id = vf->vf_id + hw->func_caps.vf_base_id;
0729 
0730     /* In the case of a VFLR, HW has already reset the VF and we just need
0731      * to clean up. Otherwise we must first trigger the reset using the
0732      * VFRTRIG register.
0733      */
0734     if (!is_vflr) {
0735         reg = rd32(hw, VPGEN_VFRTRIG(vf->vf_id));
0736         reg |= VPGEN_VFRTRIG_VFSWR_M;
0737         wr32(hw, VPGEN_VFRTRIG(vf->vf_id), reg);
0738     }
0739 
0740     /* clear the VFLR bit in GLGEN_VFLRSTAT */
0741     reg_idx = (vf_abs_id) / 32;
0742     bit_idx = (vf_abs_id) % 32;
0743     wr32(hw, GLGEN_VFLRSTAT(reg_idx), BIT(bit_idx));
0744     ice_flush(hw);
0745 
0746     wr32(hw, PF_PCI_CIAA,
0747          VF_DEVICE_STATUS | (vf_abs_id << PF_PCI_CIAA_VF_NUM_S));
0748     for (i = 0; i < ICE_PCI_CIAD_WAIT_COUNT; i++) {
0749         reg = rd32(hw, PF_PCI_CIAD);
0750         /* no transactions pending so stop polling */
0751         if ((reg & VF_TRANS_PENDING_M) == 0)
0752             break;
0753 
0754         dev_err(dev, "VF %u PCI transactions stuck\n", vf->vf_id);
0755         udelay(ICE_PCI_CIAD_WAIT_DELAY_US);
0756     }
0757 }
0758 
0759 /**
0760  * ice_sriov_poll_reset_status - poll SRIOV VF reset status
0761  * @vf: pointer to VF structure
0762  *
0763  * Returns true when reset is successful, else returns false
0764  */
0765 static bool ice_sriov_poll_reset_status(struct ice_vf *vf)
0766 {
0767     struct ice_pf *pf = vf->pf;
0768     unsigned int i;
0769     u32 reg;
0770 
0771     for (i = 0; i < 10; i++) {
0772         /* VF reset requires driver to first reset the VF and then
0773          * poll the status register to make sure that the reset
0774          * completed successfully.
0775          */
0776         reg = rd32(&pf->hw, VPGEN_VFRSTAT(vf->vf_id));
0777         if (reg & VPGEN_VFRSTAT_VFRD_M)
0778             return true;
0779 
0780         /* only sleep if the reset is not done */
0781         usleep_range(10, 20);
0782     }
0783     return false;
0784 }
0785 
0786 /**
0787  * ice_sriov_clear_reset_trigger - enable VF to access hardware
0788  * @vf: VF to enabled hardware access for
0789  */
0790 static void ice_sriov_clear_reset_trigger(struct ice_vf *vf)
0791 {
0792     struct ice_hw *hw = &vf->pf->hw;
0793     u32 reg;
0794 
0795     reg = rd32(hw, VPGEN_VFRTRIG(vf->vf_id));
0796     reg &= ~VPGEN_VFRTRIG_VFSWR_M;
0797     wr32(hw, VPGEN_VFRTRIG(vf->vf_id), reg);
0798     ice_flush(hw);
0799 }
0800 
0801 /**
0802  * ice_sriov_vsi_rebuild - release and rebuild VF's VSI
0803  * @vf: VF to release and setup the VSI for
0804  *
0805  * This is only called when a single VF is being reset (i.e. VFR, VFLR, host VF
0806  * configuration change, etc.).
0807  */
0808 static int ice_sriov_vsi_rebuild(struct ice_vf *vf)
0809 {
0810     struct ice_pf *pf = vf->pf;
0811 
0812     ice_vf_vsi_release(vf);
0813     if (!ice_vf_vsi_setup(vf)) {
0814         dev_err(ice_pf_to_dev(pf),
0815             "Failed to release and setup the VF%u's VSI\n",
0816             vf->vf_id);
0817         return -ENOMEM;
0818     }
0819 
0820     return 0;
0821 }
0822 
0823 /**
0824  * ice_sriov_post_vsi_rebuild - tasks to do after the VF's VSI have been rebuilt
0825  * @vf: VF to perform tasks on
0826  */
0827 static void ice_sriov_post_vsi_rebuild(struct ice_vf *vf)
0828 {
0829     ice_vf_rebuild_host_cfg(vf);
0830     ice_vf_set_initialized(vf);
0831     ice_ena_vf_mappings(vf);
0832     wr32(&vf->pf->hw, VFGEN_RSTAT(vf->vf_id), VIRTCHNL_VFR_VFACTIVE);
0833 }
0834 
0835 static const struct ice_vf_ops ice_sriov_vf_ops = {
0836     .reset_type = ICE_VF_RESET,
0837     .free = ice_sriov_free_vf,
0838     .clear_mbx_register = ice_sriov_clear_mbx_register,
0839     .trigger_reset_register = ice_sriov_trigger_reset_register,
0840     .poll_reset_status = ice_sriov_poll_reset_status,
0841     .clear_reset_trigger = ice_sriov_clear_reset_trigger,
0842     .vsi_rebuild = ice_sriov_vsi_rebuild,
0843     .post_vsi_rebuild = ice_sriov_post_vsi_rebuild,
0844 };
0845 
0846 /**
0847  * ice_create_vf_entries - Allocate and insert VF entries
0848  * @pf: pointer to the PF structure
0849  * @num_vfs: the number of VFs to allocate
0850  *
0851  * Allocate new VF entries and insert them into the hash table. Set some
0852  * basic default fields for initializing the new VFs.
0853  *
0854  * After this function exits, the hash table will have num_vfs entries
0855  * inserted.
0856  *
0857  * Returns 0 on success or an integer error code on failure.
0858  */
0859 static int ice_create_vf_entries(struct ice_pf *pf, u16 num_vfs)
0860 {
0861     struct ice_vfs *vfs = &pf->vfs;
0862     struct ice_vf *vf;
0863     u16 vf_id;
0864     int err;
0865 
0866     lockdep_assert_held(&vfs->table_lock);
0867 
0868     for (vf_id = 0; vf_id < num_vfs; vf_id++) {
0869         vf = kzalloc(sizeof(*vf), GFP_KERNEL);
0870         if (!vf) {
0871             err = -ENOMEM;
0872             goto err_free_entries;
0873         }
0874         kref_init(&vf->refcnt);
0875 
0876         vf->pf = pf;
0877         vf->vf_id = vf_id;
0878 
0879         /* set sriov vf ops for VFs created during SRIOV flow */
0880         vf->vf_ops = &ice_sriov_vf_ops;
0881 
0882         vf->vf_sw_id = pf->first_sw;
0883         /* assign default capabilities */
0884         vf->spoofchk = true;
0885         vf->num_vf_qs = pf->vfs.num_qps_per;
0886         ice_vc_set_default_allowlist(vf);
0887 
0888         /* ctrl_vsi_idx will be set to a valid value only when VF
0889          * creates its first fdir rule.
0890          */
0891         ice_vf_ctrl_invalidate_vsi(vf);
0892         ice_vf_fdir_init(vf);
0893 
0894         ice_virtchnl_set_dflt_ops(vf);
0895 
0896         mutex_init(&vf->cfg_lock);
0897 
0898         hash_add_rcu(vfs->table, &vf->entry, vf_id);
0899     }
0900 
0901     return 0;
0902 
0903 err_free_entries:
0904     ice_free_vf_entries(pf);
0905     return err;
0906 }
0907 
0908 /**
0909  * ice_ena_vfs - enable VFs so they are ready to be used
0910  * @pf: pointer to the PF structure
0911  * @num_vfs: number of VFs to enable
0912  */
0913 static int ice_ena_vfs(struct ice_pf *pf, u16 num_vfs)
0914 {
0915     struct device *dev = ice_pf_to_dev(pf);
0916     struct ice_hw *hw = &pf->hw;
0917     int ret;
0918 
0919     /* Disable global interrupt 0 so we don't try to handle the VFLR. */
0920     wr32(hw, GLINT_DYN_CTL(pf->oicr_idx),
0921          ICE_ITR_NONE << GLINT_DYN_CTL_ITR_INDX_S);
0922     set_bit(ICE_OICR_INTR_DIS, pf->state);
0923     ice_flush(hw);
0924 
0925     ret = pci_enable_sriov(pf->pdev, num_vfs);
0926     if (ret)
0927         goto err_unroll_intr;
0928 
0929     mutex_lock(&pf->vfs.table_lock);
0930 
0931     ret = ice_set_per_vf_res(pf, num_vfs);
0932     if (ret) {
0933         dev_err(dev, "Not enough resources for %d VFs, err %d. Try with fewer number of VFs\n",
0934             num_vfs, ret);
0935         goto err_unroll_sriov;
0936     }
0937 
0938     ret = ice_create_vf_entries(pf, num_vfs);
0939     if (ret) {
0940         dev_err(dev, "Failed to allocate VF entries for %d VFs\n",
0941             num_vfs);
0942         goto err_unroll_sriov;
0943     }
0944 
0945     ret = ice_start_vfs(pf);
0946     if (ret) {
0947         dev_err(dev, "Failed to start %d VFs, err %d\n", num_vfs, ret);
0948         ret = -EAGAIN;
0949         goto err_unroll_vf_entries;
0950     }
0951 
0952     clear_bit(ICE_VF_DIS, pf->state);
0953 
0954     ret = ice_eswitch_configure(pf);
0955     if (ret) {
0956         dev_err(dev, "Failed to configure eswitch, err %d\n", ret);
0957         goto err_unroll_sriov;
0958     }
0959 
0960     /* rearm global interrupts */
0961     if (test_and_clear_bit(ICE_OICR_INTR_DIS, pf->state))
0962         ice_irq_dynamic_ena(hw, NULL, NULL);
0963 
0964     mutex_unlock(&pf->vfs.table_lock);
0965 
0966     return 0;
0967 
0968 err_unroll_vf_entries:
0969     ice_free_vf_entries(pf);
0970 err_unroll_sriov:
0971     mutex_unlock(&pf->vfs.table_lock);
0972     pci_disable_sriov(pf->pdev);
0973 err_unroll_intr:
0974     /* rearm interrupts here */
0975     ice_irq_dynamic_ena(hw, NULL, NULL);
0976     clear_bit(ICE_OICR_INTR_DIS, pf->state);
0977     return ret;
0978 }
0979 
0980 /**
0981  * ice_pci_sriov_ena - Enable or change number of VFs
0982  * @pf: pointer to the PF structure
0983  * @num_vfs: number of VFs to allocate
0984  *
0985  * Returns 0 on success and negative on failure
0986  */
0987 static int ice_pci_sriov_ena(struct ice_pf *pf, int num_vfs)
0988 {
0989     int pre_existing_vfs = pci_num_vf(pf->pdev);
0990     struct device *dev = ice_pf_to_dev(pf);
0991     int err;
0992 
0993     if (pre_existing_vfs && pre_existing_vfs != num_vfs)
0994         ice_free_vfs(pf);
0995     else if (pre_existing_vfs && pre_existing_vfs == num_vfs)
0996         return 0;
0997 
0998     if (num_vfs > pf->vfs.num_supported) {
0999         dev_err(dev, "Can't enable %d VFs, max VFs supported is %d\n",
1000             num_vfs, pf->vfs.num_supported);
1001         return -EOPNOTSUPP;
1002     }
1003 
1004     dev_info(dev, "Enabling %d VFs\n", num_vfs);
1005     err = ice_ena_vfs(pf, num_vfs);
1006     if (err) {
1007         dev_err(dev, "Failed to enable SR-IOV: %d\n", err);
1008         return err;
1009     }
1010 
1011     set_bit(ICE_FLAG_SRIOV_ENA, pf->flags);
1012     return 0;
1013 }
1014 
1015 /**
1016  * ice_check_sriov_allowed - check if SR-IOV is allowed based on various checks
1017  * @pf: PF to enabled SR-IOV on
1018  */
1019 static int ice_check_sriov_allowed(struct ice_pf *pf)
1020 {
1021     struct device *dev = ice_pf_to_dev(pf);
1022 
1023     if (!test_bit(ICE_FLAG_SRIOV_CAPABLE, pf->flags)) {
1024         dev_err(dev, "This device is not capable of SR-IOV\n");
1025         return -EOPNOTSUPP;
1026     }
1027 
1028     if (ice_is_safe_mode(pf)) {
1029         dev_err(dev, "SR-IOV cannot be configured - Device is in Safe Mode\n");
1030         return -EOPNOTSUPP;
1031     }
1032 
1033     if (!ice_pf_state_is_nominal(pf)) {
1034         dev_err(dev, "Cannot enable SR-IOV, device not ready\n");
1035         return -EBUSY;
1036     }
1037 
1038     return 0;
1039 }
1040 
1041 /**
1042  * ice_sriov_configure - Enable or change number of VFs via sysfs
1043  * @pdev: pointer to a pci_dev structure
1044  * @num_vfs: number of VFs to allocate or 0 to free VFs
1045  *
1046  * This function is called when the user updates the number of VFs in sysfs. On
1047  * success return whatever num_vfs was set to by the caller. Return negative on
1048  * failure.
1049  */
1050 int ice_sriov_configure(struct pci_dev *pdev, int num_vfs)
1051 {
1052     struct ice_pf *pf = pci_get_drvdata(pdev);
1053     struct device *dev = ice_pf_to_dev(pf);
1054     int err;
1055 
1056     err = ice_check_sriov_allowed(pf);
1057     if (err)
1058         return err;
1059 
1060     if (!num_vfs) {
1061         if (!pci_vfs_assigned(pdev)) {
1062             ice_free_vfs(pf);
1063             ice_mbx_deinit_snapshot(&pf->hw);
1064             if (pf->lag)
1065                 ice_enable_lag(pf->lag);
1066             return 0;
1067         }
1068 
1069         dev_err(dev, "can't free VFs because some are assigned to VMs.\n");
1070         return -EBUSY;
1071     }
1072 
1073     err = ice_mbx_init_snapshot(&pf->hw, num_vfs);
1074     if (err)
1075         return err;
1076 
1077     err = ice_pci_sriov_ena(pf, num_vfs);
1078     if (err) {
1079         ice_mbx_deinit_snapshot(&pf->hw);
1080         return err;
1081     }
1082 
1083     if (pf->lag)
1084         ice_disable_lag(pf->lag);
1085     return num_vfs;
1086 }
1087 
1088 /**
1089  * ice_process_vflr_event - Free VF resources via IRQ calls
1090  * @pf: pointer to the PF structure
1091  *
1092  * called from the VFLR IRQ handler to
1093  * free up VF resources and state variables
1094  */
1095 void ice_process_vflr_event(struct ice_pf *pf)
1096 {
1097     struct ice_hw *hw = &pf->hw;
1098     struct ice_vf *vf;
1099     unsigned int bkt;
1100     u32 reg;
1101 
1102     if (!test_and_clear_bit(ICE_VFLR_EVENT_PENDING, pf->state) ||
1103         !ice_has_vfs(pf))
1104         return;
1105 
1106     mutex_lock(&pf->vfs.table_lock);
1107     ice_for_each_vf(pf, bkt, vf) {
1108         u32 reg_idx, bit_idx;
1109 
1110         reg_idx = (hw->func_caps.vf_base_id + vf->vf_id) / 32;
1111         bit_idx = (hw->func_caps.vf_base_id + vf->vf_id) % 32;
1112         /* read GLGEN_VFLRSTAT register to find out the flr VFs */
1113         reg = rd32(hw, GLGEN_VFLRSTAT(reg_idx));
1114         if (reg & BIT(bit_idx))
1115             /* GLGEN_VFLRSTAT bit will be cleared in ice_reset_vf */
1116             ice_reset_vf(vf, ICE_VF_RESET_VFLR | ICE_VF_RESET_LOCK);
1117     }
1118     mutex_unlock(&pf->vfs.table_lock);
1119 }
1120 
1121 /**
1122  * ice_get_vf_from_pfq - get the VF who owns the PF space queue passed in
1123  * @pf: PF used to index all VFs
1124  * @pfq: queue index relative to the PF's function space
1125  *
1126  * If no VF is found who owns the pfq then return NULL, otherwise return a
1127  * pointer to the VF who owns the pfq
1128  *
1129  * If this function returns non-NULL, it acquires a reference count of the VF
1130  * structure. The caller is responsible for calling ice_put_vf() to drop this
1131  * reference.
1132  */
1133 static struct ice_vf *ice_get_vf_from_pfq(struct ice_pf *pf, u16 pfq)
1134 {
1135     struct ice_vf *vf;
1136     unsigned int bkt;
1137 
1138     rcu_read_lock();
1139     ice_for_each_vf_rcu(pf, bkt, vf) {
1140         struct ice_vsi *vsi;
1141         u16 rxq_idx;
1142 
1143         vsi = ice_get_vf_vsi(vf);
1144         if (!vsi)
1145             continue;
1146 
1147         ice_for_each_rxq(vsi, rxq_idx)
1148             if (vsi->rxq_map[rxq_idx] == pfq) {
1149                 struct ice_vf *found;
1150 
1151                 if (kref_get_unless_zero(&vf->refcnt))
1152                     found = vf;
1153                 else
1154                     found = NULL;
1155                 rcu_read_unlock();
1156                 return found;
1157             }
1158     }
1159     rcu_read_unlock();
1160 
1161     return NULL;
1162 }
1163 
1164 /**
1165  * ice_globalq_to_pfq - convert from global queue index to PF space queue index
1166  * @pf: PF used for conversion
1167  * @globalq: global queue index used to convert to PF space queue index
1168  */
1169 static u32 ice_globalq_to_pfq(struct ice_pf *pf, u32 globalq)
1170 {
1171     return globalq - pf->hw.func_caps.common_cap.rxq_first_id;
1172 }
1173 
1174 /**
1175  * ice_vf_lan_overflow_event - handle LAN overflow event for a VF
1176  * @pf: PF that the LAN overflow event happened on
1177  * @event: structure holding the event information for the LAN overflow event
1178  *
1179  * Determine if the LAN overflow event was caused by a VF queue. If it was not
1180  * caused by a VF, do nothing. If a VF caused this LAN overflow event trigger a
1181  * reset on the offending VF.
1182  */
1183 void
1184 ice_vf_lan_overflow_event(struct ice_pf *pf, struct ice_rq_event_info *event)
1185 {
1186     u32 gldcb_rtctq, queue;
1187     struct ice_vf *vf;
1188 
1189     gldcb_rtctq = le32_to_cpu(event->desc.params.lan_overflow.prtdcb_ruptq);
1190     dev_dbg(ice_pf_to_dev(pf), "GLDCB_RTCTQ: 0x%08x\n", gldcb_rtctq);
1191 
1192     /* event returns device global Rx queue number */
1193     queue = (gldcb_rtctq & GLDCB_RTCTQ_RXQNUM_M) >>
1194         GLDCB_RTCTQ_RXQNUM_S;
1195 
1196     vf = ice_get_vf_from_pfq(pf, ice_globalq_to_pfq(pf, queue));
1197     if (!vf)
1198         return;
1199 
1200     ice_reset_vf(vf, ICE_VF_RESET_NOTIFY | ICE_VF_RESET_LOCK);
1201     ice_put_vf(vf);
1202 }
1203 
1204 /**
1205  * ice_set_vf_spoofchk
1206  * @netdev: network interface device structure
1207  * @vf_id: VF identifier
1208  * @ena: flag to enable or disable feature
1209  *
1210  * Enable or disable VF spoof checking
1211  */
1212 int ice_set_vf_spoofchk(struct net_device *netdev, int vf_id, bool ena)
1213 {
1214     struct ice_netdev_priv *np = netdev_priv(netdev);
1215     struct ice_pf *pf = np->vsi->back;
1216     struct ice_vsi *vf_vsi;
1217     struct device *dev;
1218     struct ice_vf *vf;
1219     int ret;
1220 
1221     dev = ice_pf_to_dev(pf);
1222 
1223     vf = ice_get_vf_by_id(pf, vf_id);
1224     if (!vf)
1225         return -EINVAL;
1226 
1227     ret = ice_check_vf_ready_for_cfg(vf);
1228     if (ret)
1229         goto out_put_vf;
1230 
1231     vf_vsi = ice_get_vf_vsi(vf);
1232     if (!vf_vsi) {
1233         netdev_err(netdev, "VSI %d for VF %d is null\n",
1234                vf->lan_vsi_idx, vf->vf_id);
1235         ret = -EINVAL;
1236         goto out_put_vf;
1237     }
1238 
1239     if (vf_vsi->type != ICE_VSI_VF) {
1240         netdev_err(netdev, "Type %d of VSI %d for VF %d is no ICE_VSI_VF\n",
1241                vf_vsi->type, vf_vsi->vsi_num, vf->vf_id);
1242         ret = -ENODEV;
1243         goto out_put_vf;
1244     }
1245 
1246     if (ena == vf->spoofchk) {
1247         dev_dbg(dev, "VF spoofchk already %s\n", ena ? "ON" : "OFF");
1248         ret = 0;
1249         goto out_put_vf;
1250     }
1251 
1252     ret = ice_vsi_apply_spoofchk(vf_vsi, ena);
1253     if (ret)
1254         dev_err(dev, "Failed to set spoofchk %s for VF %d VSI %d\n error %d\n",
1255             ena ? "ON" : "OFF", vf->vf_id, vf_vsi->vsi_num, ret);
1256     else
1257         vf->spoofchk = ena;
1258 
1259 out_put_vf:
1260     ice_put_vf(vf);
1261     return ret;
1262 }
1263 
1264 /**
1265  * ice_get_vf_cfg
1266  * @netdev: network interface device structure
1267  * @vf_id: VF identifier
1268  * @ivi: VF configuration structure
1269  *
1270  * return VF configuration
1271  */
1272 int
1273 ice_get_vf_cfg(struct net_device *netdev, int vf_id, struct ifla_vf_info *ivi)
1274 {
1275     struct ice_pf *pf = ice_netdev_to_pf(netdev);
1276     struct ice_vf *vf;
1277     int ret;
1278 
1279     vf = ice_get_vf_by_id(pf, vf_id);
1280     if (!vf)
1281         return -EINVAL;
1282 
1283     ret = ice_check_vf_ready_for_cfg(vf);
1284     if (ret)
1285         goto out_put_vf;
1286 
1287     ivi->vf = vf_id;
1288     ether_addr_copy(ivi->mac, vf->hw_lan_addr.addr);
1289 
1290     /* VF configuration for VLAN and applicable QoS */
1291     ivi->vlan = ice_vf_get_port_vlan_id(vf);
1292     ivi->qos = ice_vf_get_port_vlan_prio(vf);
1293     if (ice_vf_is_port_vlan_ena(vf))
1294         ivi->vlan_proto = cpu_to_be16(ice_vf_get_port_vlan_tpid(vf));
1295 
1296     ivi->trusted = vf->trusted;
1297     ivi->spoofchk = vf->spoofchk;
1298     if (!vf->link_forced)
1299         ivi->linkstate = IFLA_VF_LINK_STATE_AUTO;
1300     else if (vf->link_up)
1301         ivi->linkstate = IFLA_VF_LINK_STATE_ENABLE;
1302     else
1303         ivi->linkstate = IFLA_VF_LINK_STATE_DISABLE;
1304     ivi->max_tx_rate = vf->max_tx_rate;
1305     ivi->min_tx_rate = vf->min_tx_rate;
1306 
1307 out_put_vf:
1308     ice_put_vf(vf);
1309     return ret;
1310 }
1311 
1312 /**
1313  * ice_set_vf_mac
1314  * @netdev: network interface device structure
1315  * @vf_id: VF identifier
1316  * @mac: MAC address
1317  *
1318  * program VF MAC address
1319  */
1320 int ice_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac)
1321 {
1322     struct ice_pf *pf = ice_netdev_to_pf(netdev);
1323     struct ice_vf *vf;
1324     int ret;
1325 
1326     if (is_multicast_ether_addr(mac)) {
1327         netdev_err(netdev, "%pM not a valid unicast address\n", mac);
1328         return -EINVAL;
1329     }
1330 
1331     vf = ice_get_vf_by_id(pf, vf_id);
1332     if (!vf)
1333         return -EINVAL;
1334 
1335     /* nothing left to do, unicast MAC already set */
1336     if (ether_addr_equal(vf->dev_lan_addr.addr, mac) &&
1337         ether_addr_equal(vf->hw_lan_addr.addr, mac)) {
1338         ret = 0;
1339         goto out_put_vf;
1340     }
1341 
1342     ret = ice_check_vf_ready_for_cfg(vf);
1343     if (ret)
1344         goto out_put_vf;
1345 
1346     mutex_lock(&vf->cfg_lock);
1347 
1348     /* VF is notified of its new MAC via the PF's response to the
1349      * VIRTCHNL_OP_GET_VF_RESOURCES message after the VF has been reset
1350      */
1351     ether_addr_copy(vf->dev_lan_addr.addr, mac);
1352     ether_addr_copy(vf->hw_lan_addr.addr, mac);
1353     if (is_zero_ether_addr(mac)) {
1354         /* VF will send VIRTCHNL_OP_ADD_ETH_ADDR message with its MAC */
1355         vf->pf_set_mac = false;
1356         netdev_info(netdev, "Removing MAC on VF %d. VF driver will be reinitialized\n",
1357                 vf->vf_id);
1358     } else {
1359         /* PF will add MAC rule for the VF */
1360         vf->pf_set_mac = true;
1361         netdev_info(netdev, "Setting MAC %pM on VF %d. VF driver will be reinitialized\n",
1362                 mac, vf_id);
1363     }
1364 
1365     ice_reset_vf(vf, ICE_VF_RESET_NOTIFY);
1366     mutex_unlock(&vf->cfg_lock);
1367 
1368 out_put_vf:
1369     ice_put_vf(vf);
1370     return ret;
1371 }
1372 
1373 /**
1374  * ice_set_vf_trust
1375  * @netdev: network interface device structure
1376  * @vf_id: VF identifier
1377  * @trusted: Boolean value to enable/disable trusted VF
1378  *
1379  * Enable or disable a given VF as trusted
1380  */
1381 int ice_set_vf_trust(struct net_device *netdev, int vf_id, bool trusted)
1382 {
1383     struct ice_pf *pf = ice_netdev_to_pf(netdev);
1384     struct ice_vf *vf;
1385     int ret;
1386 
1387     if (ice_is_eswitch_mode_switchdev(pf)) {
1388         dev_info(ice_pf_to_dev(pf), "Trusted VF is forbidden in switchdev mode\n");
1389         return -EOPNOTSUPP;
1390     }
1391 
1392     vf = ice_get_vf_by_id(pf, vf_id);
1393     if (!vf)
1394         return -EINVAL;
1395 
1396     ret = ice_check_vf_ready_for_cfg(vf);
1397     if (ret)
1398         goto out_put_vf;
1399 
1400     /* Check if already trusted */
1401     if (trusted == vf->trusted) {
1402         ret = 0;
1403         goto out_put_vf;
1404     }
1405 
1406     mutex_lock(&vf->cfg_lock);
1407 
1408     vf->trusted = trusted;
1409     ice_reset_vf(vf, ICE_VF_RESET_NOTIFY);
1410     dev_info(ice_pf_to_dev(pf), "VF %u is now %strusted\n",
1411          vf_id, trusted ? "" : "un");
1412 
1413     mutex_unlock(&vf->cfg_lock);
1414 
1415 out_put_vf:
1416     ice_put_vf(vf);
1417     return ret;
1418 }
1419 
1420 /**
1421  * ice_set_vf_link_state
1422  * @netdev: network interface device structure
1423  * @vf_id: VF identifier
1424  * @link_state: required link state
1425  *
1426  * Set VF's link state, irrespective of physical link state status
1427  */
1428 int ice_set_vf_link_state(struct net_device *netdev, int vf_id, int link_state)
1429 {
1430     struct ice_pf *pf = ice_netdev_to_pf(netdev);
1431     struct ice_vf *vf;
1432     int ret;
1433 
1434     vf = ice_get_vf_by_id(pf, vf_id);
1435     if (!vf)
1436         return -EINVAL;
1437 
1438     ret = ice_check_vf_ready_for_cfg(vf);
1439     if (ret)
1440         goto out_put_vf;
1441 
1442     switch (link_state) {
1443     case IFLA_VF_LINK_STATE_AUTO:
1444         vf->link_forced = false;
1445         break;
1446     case IFLA_VF_LINK_STATE_ENABLE:
1447         vf->link_forced = true;
1448         vf->link_up = true;
1449         break;
1450     case IFLA_VF_LINK_STATE_DISABLE:
1451         vf->link_forced = true;
1452         vf->link_up = false;
1453         break;
1454     default:
1455         ret = -EINVAL;
1456         goto out_put_vf;
1457     }
1458 
1459     ice_vc_notify_vf_link_state(vf);
1460 
1461 out_put_vf:
1462     ice_put_vf(vf);
1463     return ret;
1464 }
1465 
1466 /**
1467  * ice_calc_all_vfs_min_tx_rate - calculate cumulative min Tx rate on all VFs
1468  * @pf: PF associated with VFs
1469  */
1470 static int ice_calc_all_vfs_min_tx_rate(struct ice_pf *pf)
1471 {
1472     struct ice_vf *vf;
1473     unsigned int bkt;
1474     int rate = 0;
1475 
1476     rcu_read_lock();
1477     ice_for_each_vf_rcu(pf, bkt, vf)
1478         rate += vf->min_tx_rate;
1479     rcu_read_unlock();
1480 
1481     return rate;
1482 }
1483 
1484 /**
1485  * ice_min_tx_rate_oversubscribed - check if min Tx rate causes oversubscription
1486  * @vf: VF trying to configure min_tx_rate
1487  * @min_tx_rate: min Tx rate in Mbps
1488  *
1489  * Check if the min_tx_rate being passed in will cause oversubscription of total
1490  * min_tx_rate based on the current link speed and all other VFs configured
1491  * min_tx_rate
1492  *
1493  * Return true if the passed min_tx_rate would cause oversubscription, else
1494  * return false
1495  */
1496 static bool
1497 ice_min_tx_rate_oversubscribed(struct ice_vf *vf, int min_tx_rate)
1498 {
1499     struct ice_vsi *vsi = ice_get_vf_vsi(vf);
1500     int all_vfs_min_tx_rate;
1501     int link_speed_mbps;
1502 
1503     if (WARN_ON(!vsi))
1504         return false;
1505 
1506     link_speed_mbps = ice_get_link_speed_mbps(vsi);
1507     all_vfs_min_tx_rate = ice_calc_all_vfs_min_tx_rate(vf->pf);
1508 
1509     /* this VF's previous rate is being overwritten */
1510     all_vfs_min_tx_rate -= vf->min_tx_rate;
1511 
1512     if (all_vfs_min_tx_rate + min_tx_rate > link_speed_mbps) {
1513         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",
1514             min_tx_rate, vf->vf_id,
1515             all_vfs_min_tx_rate + min_tx_rate - link_speed_mbps,
1516             link_speed_mbps);
1517         return true;
1518     }
1519 
1520     return false;
1521 }
1522 
1523 /**
1524  * ice_set_vf_bw - set min/max VF bandwidth
1525  * @netdev: network interface device structure
1526  * @vf_id: VF identifier
1527  * @min_tx_rate: Minimum Tx rate in Mbps
1528  * @max_tx_rate: Maximum Tx rate in Mbps
1529  */
1530 int
1531 ice_set_vf_bw(struct net_device *netdev, int vf_id, int min_tx_rate,
1532           int max_tx_rate)
1533 {
1534     struct ice_pf *pf = ice_netdev_to_pf(netdev);
1535     struct ice_vsi *vsi;
1536     struct device *dev;
1537     struct ice_vf *vf;
1538     int ret;
1539 
1540     dev = ice_pf_to_dev(pf);
1541 
1542     vf = ice_get_vf_by_id(pf, vf_id);
1543     if (!vf)
1544         return -EINVAL;
1545 
1546     ret = ice_check_vf_ready_for_cfg(vf);
1547     if (ret)
1548         goto out_put_vf;
1549 
1550     vsi = ice_get_vf_vsi(vf);
1551     if (!vsi) {
1552         ret = -EINVAL;
1553         goto out_put_vf;
1554     }
1555 
1556     if (min_tx_rate && ice_is_dcb_active(pf)) {
1557         dev_err(dev, "DCB on PF is currently enabled. VF min Tx rate limiting not allowed on this PF.\n");
1558         ret = -EOPNOTSUPP;
1559         goto out_put_vf;
1560     }
1561 
1562     if (ice_min_tx_rate_oversubscribed(vf, min_tx_rate)) {
1563         ret = -EINVAL;
1564         goto out_put_vf;
1565     }
1566 
1567     if (vf->min_tx_rate != (unsigned int)min_tx_rate) {
1568         ret = ice_set_min_bw_limit(vsi, (u64)min_tx_rate * 1000);
1569         if (ret) {
1570             dev_err(dev, "Unable to set min-tx-rate for VF %d\n",
1571                 vf->vf_id);
1572             goto out_put_vf;
1573         }
1574 
1575         vf->min_tx_rate = min_tx_rate;
1576     }
1577 
1578     if (vf->max_tx_rate != (unsigned int)max_tx_rate) {
1579         ret = ice_set_max_bw_limit(vsi, (u64)max_tx_rate * 1000);
1580         if (ret) {
1581             dev_err(dev, "Unable to set max-tx-rate for VF %d\n",
1582                 vf->vf_id);
1583             goto out_put_vf;
1584         }
1585 
1586         vf->max_tx_rate = max_tx_rate;
1587     }
1588 
1589 out_put_vf:
1590     ice_put_vf(vf);
1591     return ret;
1592 }
1593 
1594 /**
1595  * ice_get_vf_stats - populate some stats for the VF
1596  * @netdev: the netdev of the PF
1597  * @vf_id: the host OS identifier (0-255)
1598  * @vf_stats: pointer to the OS memory to be initialized
1599  */
1600 int ice_get_vf_stats(struct net_device *netdev, int vf_id,
1601              struct ifla_vf_stats *vf_stats)
1602 {
1603     struct ice_pf *pf = ice_netdev_to_pf(netdev);
1604     struct ice_eth_stats *stats;
1605     struct ice_vsi *vsi;
1606     struct ice_vf *vf;
1607     int ret;
1608 
1609     vf = ice_get_vf_by_id(pf, vf_id);
1610     if (!vf)
1611         return -EINVAL;
1612 
1613     ret = ice_check_vf_ready_for_cfg(vf);
1614     if (ret)
1615         goto out_put_vf;
1616 
1617     vsi = ice_get_vf_vsi(vf);
1618     if (!vsi) {
1619         ret = -EINVAL;
1620         goto out_put_vf;
1621     }
1622 
1623     ice_update_eth_stats(vsi);
1624     stats = &vsi->eth_stats;
1625 
1626     memset(vf_stats, 0, sizeof(*vf_stats));
1627 
1628     vf_stats->rx_packets = stats->rx_unicast + stats->rx_broadcast +
1629         stats->rx_multicast;
1630     vf_stats->tx_packets = stats->tx_unicast + stats->tx_broadcast +
1631         stats->tx_multicast;
1632     vf_stats->rx_bytes   = stats->rx_bytes;
1633     vf_stats->tx_bytes   = stats->tx_bytes;
1634     vf_stats->broadcast  = stats->rx_broadcast;
1635     vf_stats->multicast  = stats->rx_multicast;
1636     vf_stats->rx_dropped = stats->rx_discards;
1637     vf_stats->tx_dropped = stats->tx_discards;
1638 
1639 out_put_vf:
1640     ice_put_vf(vf);
1641     return ret;
1642 }
1643 
1644 /**
1645  * ice_is_supported_port_vlan_proto - make sure the vlan_proto is supported
1646  * @hw: hardware structure used to check the VLAN mode
1647  * @vlan_proto: VLAN TPID being checked
1648  *
1649  * If the device is configured in Double VLAN Mode (DVM), then both ETH_P_8021Q
1650  * and ETH_P_8021AD are supported. If the device is configured in Single VLAN
1651  * Mode (SVM), then only ETH_P_8021Q is supported.
1652  */
1653 static bool
1654 ice_is_supported_port_vlan_proto(struct ice_hw *hw, u16 vlan_proto)
1655 {
1656     bool is_supported = false;
1657 
1658     switch (vlan_proto) {
1659     case ETH_P_8021Q:
1660         is_supported = true;
1661         break;
1662     case ETH_P_8021AD:
1663         if (ice_is_dvm_ena(hw))
1664             is_supported = true;
1665         break;
1666     }
1667 
1668     return is_supported;
1669 }
1670 
1671 /**
1672  * ice_set_vf_port_vlan
1673  * @netdev: network interface device structure
1674  * @vf_id: VF identifier
1675  * @vlan_id: VLAN ID being set
1676  * @qos: priority setting
1677  * @vlan_proto: VLAN protocol
1678  *
1679  * program VF Port VLAN ID and/or QoS
1680  */
1681 int
1682 ice_set_vf_port_vlan(struct net_device *netdev, int vf_id, u16 vlan_id, u8 qos,
1683              __be16 vlan_proto)
1684 {
1685     struct ice_pf *pf = ice_netdev_to_pf(netdev);
1686     u16 local_vlan_proto = ntohs(vlan_proto);
1687     struct device *dev;
1688     struct ice_vf *vf;
1689     int ret;
1690 
1691     dev = ice_pf_to_dev(pf);
1692 
1693     if (vlan_id >= VLAN_N_VID || qos > 7) {
1694         dev_err(dev, "Invalid Port VLAN parameters for VF %d, ID %d, QoS %d\n",
1695             vf_id, vlan_id, qos);
1696         return -EINVAL;
1697     }
1698 
1699     if (!ice_is_supported_port_vlan_proto(&pf->hw, local_vlan_proto)) {
1700         dev_err(dev, "VF VLAN protocol 0x%04x is not supported\n",
1701             local_vlan_proto);
1702         return -EPROTONOSUPPORT;
1703     }
1704 
1705     vf = ice_get_vf_by_id(pf, vf_id);
1706     if (!vf)
1707         return -EINVAL;
1708 
1709     ret = ice_check_vf_ready_for_cfg(vf);
1710     if (ret)
1711         goto out_put_vf;
1712 
1713     if (ice_vf_get_port_vlan_prio(vf) == qos &&
1714         ice_vf_get_port_vlan_tpid(vf) == local_vlan_proto &&
1715         ice_vf_get_port_vlan_id(vf) == vlan_id) {
1716         /* duplicate request, so just return success */
1717         dev_dbg(dev, "Duplicate port VLAN %u, QoS %u, TPID 0x%04x request\n",
1718             vlan_id, qos, local_vlan_proto);
1719         ret = 0;
1720         goto out_put_vf;
1721     }
1722 
1723     mutex_lock(&vf->cfg_lock);
1724 
1725     vf->port_vlan_info = ICE_VLAN(local_vlan_proto, vlan_id, qos);
1726     if (ice_vf_is_port_vlan_ena(vf))
1727         dev_info(dev, "Setting VLAN %u, QoS %u, TPID 0x%04x on VF %d\n",
1728              vlan_id, qos, local_vlan_proto, vf_id);
1729     else
1730         dev_info(dev, "Clearing port VLAN on VF %d\n", vf_id);
1731 
1732     ice_reset_vf(vf, ICE_VF_RESET_NOTIFY);
1733     mutex_unlock(&vf->cfg_lock);
1734 
1735 out_put_vf:
1736     ice_put_vf(vf);
1737     return ret;
1738 }
1739 
1740 /**
1741  * ice_print_vf_rx_mdd_event - print VF Rx malicious driver detect event
1742  * @vf: pointer to the VF structure
1743  */
1744 void ice_print_vf_rx_mdd_event(struct ice_vf *vf)
1745 {
1746     struct ice_pf *pf = vf->pf;
1747     struct device *dev;
1748 
1749     dev = ice_pf_to_dev(pf);
1750 
1751     dev_info(dev, "%d Rx Malicious Driver Detection events detected on PF %d VF %d MAC %pM. mdd-auto-reset-vfs=%s\n",
1752          vf->mdd_rx_events.count, pf->hw.pf_id, vf->vf_id,
1753          vf->dev_lan_addr.addr,
1754          test_bit(ICE_FLAG_MDD_AUTO_RESET_VF, pf->flags)
1755               ? "on" : "off");
1756 }
1757 
1758 /**
1759  * ice_print_vfs_mdd_events - print VFs malicious driver detect event
1760  * @pf: pointer to the PF structure
1761  *
1762  * Called from ice_handle_mdd_event to rate limit and print VFs MDD events.
1763  */
1764 void ice_print_vfs_mdd_events(struct ice_pf *pf)
1765 {
1766     struct device *dev = ice_pf_to_dev(pf);
1767     struct ice_hw *hw = &pf->hw;
1768     struct ice_vf *vf;
1769     unsigned int bkt;
1770 
1771     /* check that there are pending MDD events to print */
1772     if (!test_and_clear_bit(ICE_MDD_VF_PRINT_PENDING, pf->state))
1773         return;
1774 
1775     /* VF MDD event logs are rate limited to one second intervals */
1776     if (time_is_after_jiffies(pf->vfs.last_printed_mdd_jiffies + HZ * 1))
1777         return;
1778 
1779     pf->vfs.last_printed_mdd_jiffies = jiffies;
1780 
1781     mutex_lock(&pf->vfs.table_lock);
1782     ice_for_each_vf(pf, bkt, vf) {
1783         /* only print Rx MDD event message if there are new events */
1784         if (vf->mdd_rx_events.count != vf->mdd_rx_events.last_printed) {
1785             vf->mdd_rx_events.last_printed =
1786                             vf->mdd_rx_events.count;
1787             ice_print_vf_rx_mdd_event(vf);
1788         }
1789 
1790         /* only print Tx MDD event message if there are new events */
1791         if (vf->mdd_tx_events.count != vf->mdd_tx_events.last_printed) {
1792             vf->mdd_tx_events.last_printed =
1793                             vf->mdd_tx_events.count;
1794 
1795             dev_info(dev, "%d Tx Malicious Driver Detection events detected on PF %d VF %d MAC %pM.\n",
1796                  vf->mdd_tx_events.count, hw->pf_id, vf->vf_id,
1797                  vf->dev_lan_addr.addr);
1798         }
1799     }
1800     mutex_unlock(&pf->vfs.table_lock);
1801 }
1802 
1803 /**
1804  * ice_restore_all_vfs_msi_state - restore VF MSI state after PF FLR
1805  * @pdev: pointer to a pci_dev structure
1806  *
1807  * Called when recovering from a PF FLR to restore interrupt capability to
1808  * the VFs.
1809  */
1810 void ice_restore_all_vfs_msi_state(struct pci_dev *pdev)
1811 {
1812     u16 vf_id;
1813     int pos;
1814 
1815     if (!pci_num_vf(pdev))
1816         return;
1817 
1818     pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
1819     if (pos) {
1820         struct pci_dev *vfdev;
1821 
1822         pci_read_config_word(pdev, pos + PCI_SRIOV_VF_DID,
1823                      &vf_id);
1824         vfdev = pci_get_device(pdev->vendor, vf_id, NULL);
1825         while (vfdev) {
1826             if (vfdev->is_virtfn && vfdev->physfn == pdev)
1827                 pci_restore_msi_state(vfdev);
1828             vfdev = pci_get_device(pdev->vendor, vf_id,
1829                            vfdev);
1830         }
1831     }
1832 }
1833 
1834 /**
1835  * ice_is_malicious_vf - helper function to detect a malicious VF
1836  * @pf: ptr to struct ice_pf
1837  * @event: pointer to the AQ event
1838  * @num_msg_proc: the number of messages processed so far
1839  * @num_msg_pending: the number of messages peinding in admin queue
1840  */
1841 bool
1842 ice_is_malicious_vf(struct ice_pf *pf, struct ice_rq_event_info *event,
1843             u16 num_msg_proc, u16 num_msg_pending)
1844 {
1845     s16 vf_id = le16_to_cpu(event->desc.retval);
1846     struct device *dev = ice_pf_to_dev(pf);
1847     struct ice_mbx_data mbxdata;
1848     bool malvf = false;
1849     struct ice_vf *vf;
1850     int status;
1851 
1852     vf = ice_get_vf_by_id(pf, vf_id);
1853     if (!vf)
1854         return false;
1855 
1856     if (test_bit(ICE_VF_STATE_DIS, vf->vf_states))
1857         goto out_put_vf;
1858 
1859     mbxdata.num_msg_proc = num_msg_proc;
1860     mbxdata.num_pending_arq = num_msg_pending;
1861     mbxdata.max_num_msgs_mbx = pf->hw.mailboxq.num_rq_entries;
1862 #define ICE_MBX_OVERFLOW_WATERMARK 64
1863     mbxdata.async_watermark_val = ICE_MBX_OVERFLOW_WATERMARK;
1864 
1865     /* check to see if we have a malicious VF */
1866     status = ice_mbx_vf_state_handler(&pf->hw, &mbxdata, vf_id, &malvf);
1867     if (status)
1868         goto out_put_vf;
1869 
1870     if (malvf) {
1871         bool report_vf = false;
1872 
1873         /* if the VF is malicious and we haven't let the user
1874          * know about it, then let them know now
1875          */
1876         status = ice_mbx_report_malvf(&pf->hw, pf->vfs.malvfs,
1877                           ICE_MAX_SRIOV_VFS, vf_id,
1878                           &report_vf);
1879         if (status)
1880             dev_dbg(dev, "Error reporting malicious VF\n");
1881 
1882         if (report_vf) {
1883             struct ice_vsi *pf_vsi = ice_get_main_vsi(pf);
1884 
1885             if (pf_vsi)
1886                 dev_warn(dev, "VF MAC %pM on PF MAC %pM is generating asynchronous messages and may be overflowing the PF message queue. Please see the Adapter User Guide for more information\n",
1887                      &vf->dev_lan_addr.addr[0],
1888                      pf_vsi->netdev->dev_addr);
1889         }
1890     }
1891 
1892 out_put_vf:
1893     ice_put_vf(vf);
1894     return malvf;
1895 }
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