/** * ice_free_vf_entries - Free all VF entries from the hash table * @pf: pointer to the PF structure * * Iterate over the VF hash table, removing and releasing all VF entries. * Called during VF teardown or as cleanup during failed VF initialization.
*/ staticvoid ice_free_vf_entries(struct ice_pf *pf)
{ struct ice_vfs *vfs = &pf->vfs; struct hlist_node *tmp; struct ice_vf *vf; unsignedint bkt;
/* Remove all VFs from the hash table and release their main * reference. Once all references to the VF are dropped, ice_put_vf() * will call ice_release_vf which will remove the VF memory.
*/
lockdep_assert_held(&vfs->table_lock);
/** * ice_free_vf_res - Free a VF's resources * @vf: pointer to the VF info
*/ staticvoid ice_free_vf_res(struct ice_vf *vf)
{ struct ice_pf *pf = vf->pf; int i, last_vector_idx;
/* First, disable VF's configuration API to prevent OS from * accessing the VF's VSI after it's freed or invalidated.
*/
clear_bit(ICE_VF_STATE_INIT, vf->vf_states);
ice_vf_fdir_exit(vf); /* free VF control VSI */ if (vf->ctrl_vsi_idx != ICE_NO_VSI)
ice_vf_ctrl_vsi_release(vf);
/* free VSI and disconnect it from the parent uplink */ if (vf->lan_vsi_idx != ICE_NO_VSI) {
ice_vf_vsi_release(vf);
vf->num_mac = 0;
vf->num_mac_lldp = 0;
}
/* Disable interrupts so that VF starts in a known state */ for (i = vf->first_vector_idx; i <= last_vector_idx; i++) {
wr32(&pf->hw, GLINT_DYN_CTL(i), GLINT_DYN_CTL_CLEARPBA_M);
ice_flush(&pf->hw);
} /* reset some of the state variables keeping track of the resources */
clear_bit(ICE_VF_STATE_MC_PROMISC, vf->vf_states);
clear_bit(ICE_VF_STATE_UC_PROMISC, vf->vf_states);
}
/** * ice_dis_vf_mappings * @vf: pointer to the VF structure
*/ staticvoid ice_dis_vf_mappings(struct ice_vf *vf)
{ struct ice_pf *pf = vf->pf; struct ice_vsi *vsi; struct device *dev; int first, last, v; struct ice_hw *hw;
hw = &pf->hw;
vsi = ice_get_vf_vsi(vf); if (WARN_ON(!vsi)) return;
dev = ice_pf_to_dev(pf);
wr32(hw, VPINT_ALLOC(vf->vf_id), 0);
wr32(hw, VPINT_ALLOC_PCI(vf->vf_id), 0);
first = vf->first_vector_idx;
last = first + vf->num_msix - 1; for (v = first; v <= last; v++) {
u32 reg;
if (vsi->tx_mapping_mode == ICE_VSI_MAP_CONTIG)
wr32(hw, VPLAN_TX_QBASE(vf->vf_id), 0); else
dev_err(dev, "Scattered mode for VF Tx queues is not yet implemented\n");
if (vsi->rx_mapping_mode == ICE_VSI_MAP_CONTIG)
wr32(hw, VPLAN_RX_QBASE(vf->vf_id), 0); else
dev_err(dev, "Scattered mode for VF Rx queues is not yet implemented\n");
}
while (test_and_set_bit(ICE_VF_DIS, pf->state))
usleep_range(1000, 2000);
/* Disable IOV before freeing resources. This lets any VF drivers * running in the host get themselves cleaned up before we yank * the carpet out from underneath their feet.
*/ if (!pci_vfs_assigned(pf->pdev))
pci_disable_sriov(pf->pdev); else
dev_warn(dev, "VFs are assigned - not disabling SR-IOV\n");
if (test_bit(ICE_VF_STATE_INIT, vf->vf_states)) { /* disable VF qp mappings and set VF disable state */
ice_dis_vf_mappings(vf);
set_bit(ICE_VF_STATE_DIS, vf->vf_states);
ice_free_vf_res(vf);
}
if (!pci_vfs_assigned(pf->pdev)) {
u32 reg_idx, bit_idx;
/** * ice_vf_vsi_setup - Set up a VF VSI * @vf: VF to setup VSI for * * Returns pointer to the successfully allocated VSI struct on success, * otherwise returns NULL on failure.
*/ staticstruct ice_vsi *ice_vf_vsi_setup(struct ice_vf *vf)
{ struct ice_vsi_cfg_params params = {}; struct ice_pf *pf = vf->pf; struct ice_vsi *vsi;
if (!vsi) {
dev_err(ice_pf_to_dev(pf), "Failed to create VF VSI\n");
ice_vf_invalidate_vsi(vf); return NULL;
}
vf->lan_vsi_idx = vsi->idx;
return vsi;
}
/** * ice_ena_vf_msix_mappings - enable VF MSIX mappings in hardware * @vf: VF to enable MSIX mappings for * * Some of the registers need to be indexed/configured using hardware global * device values and other registers need 0-based values, which represent PF * based values.
*/ staticvoid ice_ena_vf_msix_mappings(struct ice_vf *vf)
{ int device_based_first_msix, device_based_last_msix; int pf_based_first_msix, pf_based_last_msix, v; struct ice_pf *pf = vf->pf; int device_based_vf_id; struct ice_hw *hw;
u32 reg;
/* map the interrupts to its functions */ for (v = pf_based_first_msix; v <= pf_based_last_msix; v++) {
reg = FIELD_PREP(GLINT_VECT2FUNC_VF_NUM_M, device_based_vf_id) |
FIELD_PREP(GLINT_VECT2FUNC_PF_NUM_M, hw->pf_id);
wr32(hw, GLINT_VECT2FUNC(v), reg);
}
/** * ice_ena_vf_q_mappings - enable Rx/Tx queue mappings for a VF * @vf: VF to enable the mappings for * @max_txq: max Tx queues allowed on the VF's VSI * @max_rxq: max Rx queues allowed on the VF's VSI
*/ staticvoid ice_ena_vf_q_mappings(struct ice_vf *vf, u16 max_txq, u16 max_rxq)
{ struct device *dev = ice_pf_to_dev(vf->pf); struct ice_vsi *vsi = ice_get_vf_vsi(vf); struct ice_hw *hw = &vf->pf->hw;
u32 reg;
if (WARN_ON(!vsi)) return;
/* set regardless of mapping mode */
wr32(hw, VPLAN_TXQ_MAPENA(vf->vf_id), VPLAN_TXQ_MAPENA_TX_ENA_M);
/* VF Tx queues allocation */ if (vsi->tx_mapping_mode == ICE_VSI_MAP_CONTIG) { /* set the VF PF Tx queue range * VFNUMQ value should be set to (number of queues - 1). A value * of 0 means 1 queue and a value of 255 means 256 queues
*/
reg = FIELD_PREP(VPLAN_TX_QBASE_VFFIRSTQ_M, vsi->txq_map[0]) |
FIELD_PREP(VPLAN_TX_QBASE_VFNUMQ_M, max_txq - 1);
wr32(hw, VPLAN_TX_QBASE(vf->vf_id), reg);
} else {
dev_err(dev, "Scattered mode for VF Tx queues is not yet implemented\n");
}
/* set regardless of mapping mode */
wr32(hw, VPLAN_RXQ_MAPENA(vf->vf_id), VPLAN_RXQ_MAPENA_RX_ENA_M);
/* VF Rx queues allocation */ if (vsi->rx_mapping_mode == ICE_VSI_MAP_CONTIG) { /* set the VF PF Rx queue range * VFNUMQ value should be set to (number of queues - 1). A value * of 0 means 1 queue and a value of 255 means 256 queues
*/
reg = FIELD_PREP(VPLAN_RX_QBASE_VFFIRSTQ_M, vsi->rxq_map[0]) |
FIELD_PREP(VPLAN_RX_QBASE_VFNUMQ_M, max_rxq - 1);
wr32(hw, VPLAN_RX_QBASE(vf->vf_id), reg);
} else {
dev_err(dev, "Scattered mode for VF Rx queues is not yet implemented\n");
}
}
/** * ice_ena_vf_mappings - enable VF MSIX and queue mapping * @vf: pointer to the VF structure
*/ staticvoid ice_ena_vf_mappings(struct ice_vf *vf)
{ struct ice_vsi *vsi = ice_get_vf_vsi(vf);
/** * ice_calc_vf_reg_idx - Calculate the VF's register index in the PF space * @vf: VF to calculate the register index for * @q_vector: a q_vector associated to the VF
*/ void ice_calc_vf_reg_idx(struct ice_vf *vf, struct ice_q_vector *q_vector)
{ if (!vf || !q_vector) return;
/* always add one to account for the OICR being the first MSIX */
q_vector->vf_reg_idx = q_vector->v_idx + ICE_NONQ_VECS_VF;
q_vector->reg_idx = vf->first_vector_idx + q_vector->vf_reg_idx;
}
/** * ice_set_per_vf_res - check if vectors and queues are available * @pf: pointer to the PF structure * @num_vfs: the number of SR-IOV VFs being configured * * First, determine HW interrupts from common pool. If we allocate fewer VFs, we * get more vectors and can enable more queues per VF. Note that this does not * grab any vectors from the SW pool already allocated. Also note, that all * vector counts include one for each VF's miscellaneous interrupt vector * (i.e. OICR). * * Minimum VFs - 2 vectors, 1 queue pair * Small VFs - 5 vectors, 4 queue pairs * Medium VFs - 17 vectors, 16 queue pairs * * Second, determine number of queue pairs per VF by starting with a pre-defined * maximum each VF supports. If this is not possible, then we adjust based on * queue pairs available on the device. * * Lastly, set queue and MSI-X VF variables tracked by the PF so it can be used * by each VF during VF initialization and reset.
*/ staticint ice_set_per_vf_res(struct ice_pf *pf, u16 num_vfs)
{
u16 num_msix_per_vf, num_txq, num_rxq, avail_qs; int msix_avail_per_vf, msix_avail_for_sriov; struct device *dev = ice_pf_to_dev(pf);
lockdep_assert_held(&pf->vfs.table_lock);
if (!num_vfs) return -EINVAL;
/* determine MSI-X resources per VF */
msix_avail_for_sriov = pf->virt_irq_tracker.num_entries;
msix_avail_per_vf = msix_avail_for_sriov / num_vfs; if (msix_avail_per_vf >= ICE_NUM_VF_MSIX_MED) {
num_msix_per_vf = ICE_NUM_VF_MSIX_MED;
} elseif (msix_avail_per_vf >= ICE_NUM_VF_MSIX_SMALL) {
num_msix_per_vf = ICE_NUM_VF_MSIX_SMALL;
} elseif (msix_avail_per_vf >= ICE_NUM_VF_MSIX_MULTIQ_MIN) {
num_msix_per_vf = ICE_NUM_VF_MSIX_MULTIQ_MIN;
} elseif (msix_avail_per_vf >= ICE_MIN_INTR_PER_VF) {
num_msix_per_vf = ICE_MIN_INTR_PER_VF;
} else {
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",
msix_avail_for_sriov, ICE_MIN_INTR_PER_VF,
num_vfs); return -ENOSPC;
}
if (num_txq < ICE_MIN_QS_PER_VF || num_rxq < ICE_MIN_QS_PER_VF) {
dev_err(dev, "Not enough queues to support minimum of %d queue pairs per VF for %d VFs\n",
ICE_MIN_QS_PER_VF, num_vfs); return -ENOSPC;
}
/* only allow equal Tx/Rx queue count (i.e. queue pairs) */
pf->vfs.num_qps_per = min_t(int, num_txq, num_rxq);
pf->vfs.num_msix_per = num_msix_per_vf;
dev_info(dev, "Enabling %d VFs with %d vectors and %d queues per VF\n",
num_vfs, pf->vfs.num_msix_per, pf->vfs.num_qps_per);
return 0;
}
/** * ice_init_vf_vsi_res - initialize/setup VF VSI resources * @vf: VF to initialize/setup the VSI for * * This function creates a VSI for the VF, adds a VLAN 0 filter, and sets up the * VF VSI's broadcast filter and is only used during initial VF creation.
*/ staticint ice_init_vf_vsi_res(struct ice_vf *vf)
{ struct ice_pf *pf = vf->pf; struct ice_vsi *vsi; int err;
vf->first_vector_idx = ice_virt_get_irqs(pf, vf->num_msix); if (vf->first_vector_idx < 0) return -ENOMEM;
vsi = ice_vf_vsi_setup(vf); if (!vsi) return -ENOMEM;
err = ice_vf_init_host_cfg(vf, vsi); if (err) goto release_vsi;
/** * ice_start_vfs - start VFs so they are ready to be used by SR-IOV * @pf: PF the VFs are associated with
*/ staticint ice_start_vfs(struct ice_pf *pf)
{ struct ice_hw *hw = &pf->hw; unsignedint bkt, it_cnt; struct ice_vf *vf; int retval;
/** * ice_sriov_free_vf - Free VF memory after all references are dropped * @vf: pointer to VF to free * * Called by ice_put_vf through ice_release_vf once the last reference to a VF * structure has been dropped.
*/ staticvoid ice_sriov_free_vf(struct ice_vf *vf)
{
mutex_destroy(&vf->cfg_lock);
kfree_rcu(vf, rcu);
}
/** * ice_sriov_clear_reset_state - clears VF Reset status register * @vf: the vf to configure
*/ staticvoid ice_sriov_clear_reset_state(struct ice_vf *vf)
{ struct ice_hw *hw = &vf->pf->hw;
/* Clear the reset status register so that VF immediately sees that * the device is resetting, even if hardware hasn't yet gotten around * to clearing VFGEN_RSTAT for us.
*/
wr32(hw, VFGEN_RSTAT(vf->vf_id), VIRTCHNL_VFR_INPROGRESS);
}
/* In the case of a VFLR, HW has already reset the VF and we just need * to clean up. Otherwise we must first trigger the reset using the * VFRTRIG register.
*/ if (!is_vflr) {
reg = rd32(hw, VPGEN_VFRTRIG(vf->vf_id));
reg |= VPGEN_VFRTRIG_VFSWR_M;
wr32(hw, VPGEN_VFRTRIG(vf->vf_id), reg);
}
/* clear the VFLR bit in GLGEN_VFLRSTAT */
reg_idx = (vf_abs_id) / 32;
bit_idx = (vf_abs_id) % 32;
wr32(hw, GLGEN_VFLRSTAT(reg_idx), BIT(bit_idx));
ice_flush(hw);
wr32(hw, PF_PCI_CIAA,
VF_DEVICE_STATUS | (vf_abs_id << PF_PCI_CIAA_VF_NUM_S)); for (i = 0; i < ICE_PCI_CIAD_WAIT_COUNT; i++) {
reg = rd32(hw, PF_PCI_CIAD); /* no transactions pending so stop polling */ if ((reg & VF_TRANS_PENDING_M) == 0) break;
for (i = 0; i < 10; i++) { /* VF reset requires driver to first reset the VF and then * poll the status register to make sure that the reset * completed successfully.
*/
reg = rd32(&pf->hw, VPGEN_VFRSTAT(vf->vf_id)); if (reg & VPGEN_VFRSTAT_VFRD_M) returntrue;
/* only sleep if the reset is not done */
usleep_range(10, 20);
} returnfalse;
}
/** * ice_sriov_clear_reset_trigger - enable VF to access hardware * @vf: VF to enabled hardware access for
*/ staticvoid ice_sriov_clear_reset_trigger(struct ice_vf *vf)
{ struct ice_hw *hw = &vf->pf->hw;
u32 reg;
/** * ice_sriov_post_vsi_rebuild - tasks to do after the VF's VSI have been rebuilt * @vf: VF to perform tasks on
*/ staticvoid ice_sriov_post_vsi_rebuild(struct ice_vf *vf)
{
ice_ena_vf_mappings(vf);
wr32(&vf->pf->hw, VFGEN_RSTAT(vf->vf_id), VIRTCHNL_VFR_VFACTIVE);
}
/** * ice_create_vf_entries - Allocate and insert VF entries * @pf: pointer to the PF structure * @num_vfs: the number of VFs to allocate * * Allocate new VF entries and insert them into the hash table. Set some * basic default fields for initializing the new VFs. * * After this function exits, the hash table will have num_vfs entries * inserted. * * Returns 0 on success or an integer error code on failure.
*/ staticint ice_create_vf_entries(struct ice_pf *pf, u16 num_vfs)
{ struct pci_dev *pdev = pf->pdev; struct ice_vfs *vfs = &pf->vfs; struct pci_dev *vfdev = NULL; struct ice_vf *vf;
u16 vf_pdev_id; int err, pos;
/* set sriov vf ops for VFs created during SRIOV flow */
vf->vf_ops = &ice_sriov_vf_ops;
ice_initialize_vf_entry(vf);
do {
vfdev = pci_get_device(pdev->vendor, vf_pdev_id, vfdev);
} while (vfdev && vfdev->physfn != pdev);
vf->vfdev = vfdev;
vf->vf_sw_id = pf->first_sw;
pci_dev_get(vfdev);
hash_add_rcu(vfs->table, &vf->entry, vf_id);
}
/* Decrement of refcount done by pci_get_device() inside the loop does * not touch the last iteration's vfdev, so it has to be done manually * to balance pci_dev_get() added within the loop.
*/
pci_dev_put(vfdev);
/** * ice_ena_vfs - enable VFs so they are ready to be used * @pf: pointer to the PF structure * @num_vfs: number of VFs to enable
*/ staticint ice_ena_vfs(struct ice_pf *pf, u16 num_vfs)
{ struct device *dev = ice_pf_to_dev(pf); struct ice_hw *hw = &pf->hw; int ret;
/* Disable global interrupt 0 so we don't try to handle the VFLR. */
wr32(hw, GLINT_DYN_CTL(pf->oicr_irq.index),
ICE_ITR_NONE << GLINT_DYN_CTL_ITR_INDX_S);
set_bit(ICE_OICR_INTR_DIS, pf->state);
ice_flush(hw);
ret = pci_enable_sriov(pf->pdev, num_vfs); if (ret) goto err_unroll_intr;
mutex_lock(&pf->vfs.table_lock);
ret = ice_set_per_vf_res(pf, num_vfs); if (ret) {
dev_err(dev, "Not enough resources for %d VFs, err %d. Try with fewer number of VFs\n",
num_vfs, ret); goto err_unroll_sriov;
}
ret = ice_create_vf_entries(pf, num_vfs); if (ret) {
dev_err(dev, "Failed to allocate VF entries for %d VFs\n",
num_vfs); goto err_unroll_sriov;
}
ret = ice_start_vfs(pf); if (ret) {
dev_err(dev, "Failed to start %d VFs, err %d\n", num_vfs, ret);
ret = -EAGAIN; goto err_unroll_vf_entries;
}
clear_bit(ICE_VF_DIS, pf->state);
/* rearm global interrupts */ if (test_and_clear_bit(ICE_OICR_INTR_DIS, pf->state))
ice_irq_dynamic_ena(hw, NULL, NULL);
/** * ice_pci_sriov_ena - Enable or change number of VFs * @pf: pointer to the PF structure * @num_vfs: number of VFs to allocate * * Returns 0 on success and negative on failure
*/ staticint ice_pci_sriov_ena(struct ice_pf *pf, int num_vfs)
{ struct device *dev = ice_pf_to_dev(pf); int err;
if (!num_vfs) {
ice_free_vfs(pf); return 0;
}
if (num_vfs > pf->vfs.num_supported) {
dev_err(dev, "Can't enable %d VFs, max VFs supported is %d\n",
num_vfs, pf->vfs.num_supported); return -EOPNOTSUPP;
}
/** * ice_check_sriov_allowed - check if SR-IOV is allowed based on various checks * @pf: PF to enabled SR-IOV on
*/ staticint ice_check_sriov_allowed(struct ice_pf *pf)
{ struct device *dev = ice_pf_to_dev(pf);
if (!test_bit(ICE_FLAG_SRIOV_CAPABLE, pf->flags)) {
dev_err(dev, "This device is not capable of SR-IOV\n"); return -EOPNOTSUPP;
}
if (ice_is_safe_mode(pf)) {
dev_err(dev, "SR-IOV cannot be configured - Device is in Safe Mode\n"); return -EOPNOTSUPP;
}
if (!ice_pf_state_is_nominal(pf)) {
dev_err(dev, "Cannot enable SR-IOV, device not ready\n"); return -EBUSY;
}
return 0;
}
/** * ice_sriov_get_vf_total_msix - return number of MSI-X used by VFs * @pdev: pointer to pci_dev struct * * The function is called via sysfs ops
*/
u32 ice_sriov_get_vf_total_msix(struct pci_dev *pdev)
{ struct ice_pf *pf = pci_get_drvdata(pdev);
/* For better irqs usage try to remap irqs of VFs * that aren't running yet
*/
ice_for_each_vf(pf, bkt, tmp_vf) { /* skip VF which is changing the number of MSI-X */ if (restricted_id == tmp_vf->vf_id ||
test_bit(ICE_VF_STATE_ACTIVE, tmp_vf->vf_states)) continue;
for (int i = 0; i < to_remap; i++) {
tmp_vf = ice_get_vf_by_id(pf, vf_ids[i]); if (!tmp_vf) continue;
tmp_vf->first_vector_idx =
ice_virt_get_irqs(pf, tmp_vf->num_msix); /* there is no need to rebuild VSI as we are only changing the * vector indexes not amount of MSI-X or queues
*/
ice_ena_vf_mappings(tmp_vf);
ice_put_vf(tmp_vf);
}
}
/** * ice_sriov_set_msix_vec_count * @vf_dev: pointer to pci_dev struct of VF device * @msix_vec_count: new value for MSI-X amount on this VF * * Set requested MSI-X, queues and registers for @vf_dev. * * First do some sanity checks like if there are any VFs, if the new value * is correct etc. Then disable old mapping (MSI-X and queues registers), change * MSI-X and queues, rebuild VSI and enable new mapping. * * If it is possible (driver not binded to VF) try to remap also other VFs to * linearize irqs register usage.
*/ int ice_sriov_set_msix_vec_count(struct pci_dev *vf_dev, int msix_vec_count)
{ struct pci_dev *pdev = pci_physfn(vf_dev); struct ice_pf *pf = pci_get_drvdata(pdev);
u16 prev_msix, prev_queues, queues; bool needs_rebuild = false; struct ice_vsi *vsi; struct ice_vf *vf;
if (needs_rebuild) {
vsi->req_txq = prev_queues;
vsi->req_rxq = prev_queues;
ice_vsi_rebuild(vsi, ICE_VSI_FLAG_NO_INIT);
}
ice_ena_vf_mappings(vf);
ice_put_vf(vf);
return -EINVAL;
}
/** * ice_sriov_configure - Enable or change number of VFs via sysfs * @pdev: pointer to a pci_dev structure * @num_vfs: number of VFs to allocate or 0 to free VFs * * This function is called when the user updates the number of VFs in sysfs. On * success return whatever num_vfs was set to by the caller. Return negative on * failure.
*/ int ice_sriov_configure(struct pci_dev *pdev, int num_vfs)
{ struct ice_pf *pf = pci_get_drvdata(pdev); struct device *dev = ice_pf_to_dev(pf); int err;
err = ice_check_sriov_allowed(pf); if (err) return err;
if (!num_vfs) { if (!pci_vfs_assigned(pdev)) {
ice_free_vfs(pf); return 0;
}
dev_err(dev, "can't free VFs because some are assigned to VMs.\n"); return -EBUSY;
}
err = ice_pci_sriov_ena(pf, num_vfs); if (err) return err;
return num_vfs;
}
/** * ice_process_vflr_event - Free VF resources via IRQ calls * @pf: pointer to the PF structure * * called from the VFLR IRQ handler to * free up VF resources and state variables
*/ void ice_process_vflr_event(struct ice_pf *pf)
{ struct ice_hw *hw = &pf->hw; struct ice_vf *vf; unsignedint bkt;
u32 reg;
if (!test_and_clear_bit(ICE_VFLR_EVENT_PENDING, pf->state) ||
!ice_has_vfs(pf)) return;
reg_idx = (hw->func_caps.vf_base_id + vf->vf_id) / 32;
bit_idx = (hw->func_caps.vf_base_id + vf->vf_id) % 32; /* read GLGEN_VFLRSTAT register to find out the flr VFs */
reg = rd32(hw, GLGEN_VFLRSTAT(reg_idx)); if (reg & BIT(bit_idx)) /* GLGEN_VFLRSTAT bit will be cleared in ice_reset_vf */
ice_reset_vf(vf, ICE_VF_RESET_VFLR | ICE_VF_RESET_LOCK);
}
mutex_unlock(&pf->vfs.table_lock);
}
/** * ice_get_vf_from_pfq - get the VF who owns the PF space queue passed in * @pf: PF used to index all VFs * @pfq: queue index relative to the PF's function space * * If no VF is found who owns the pfq then return NULL, otherwise return a * pointer to the VF who owns the pfq * * If this function returns non-NULL, it acquires a reference count of the VF * structure. The caller is responsible for calling ice_put_vf() to drop this * reference.
*/ staticstruct ice_vf *ice_get_vf_from_pfq(struct ice_pf *pf, u16 pfq)
{ struct ice_vf *vf; unsignedint bkt;
ice_for_each_rxq(vsi, rxq_idx) if (vsi->rxq_map[rxq_idx] == pfq) { struct ice_vf *found;
if (kref_get_unless_zero(&vf->refcnt))
found = vf; else
found = NULL;
rcu_read_unlock(); return found;
}
}
rcu_read_unlock();
return NULL;
}
/** * ice_globalq_to_pfq - convert from global queue index to PF space queue index * @pf: PF used for conversion * @globalq: global queue index used to convert to PF space queue index
*/ static u32 ice_globalq_to_pfq(struct ice_pf *pf, u32 globalq)
{ return globalq - pf->hw.func_caps.common_cap.rxq_first_id;
}
/** * ice_vf_lan_overflow_event - handle LAN overflow event for a VF * @pf: PF that the LAN overflow event happened on * @event: structure holding the event information for the LAN overflow event * * Determine if the LAN overflow event was caused by a VF queue. If it was not * caused by a VF, do nothing. If a VF caused this LAN overflow event trigger a * reset on the offending VF.
*/ void
ice_vf_lan_overflow_event(struct ice_pf *pf, struct ice_rq_event_info *event)
{ struct ice_aqc_event_lan_overflow *cmd;
u32 gldcb_rtctq, queue; struct ice_vf *vf;
/** * ice_set_vf_spoofchk * @netdev: network interface device structure * @vf_id: VF identifier * @ena: flag to enable or disable feature * * Enable or disable VF spoof checking
*/ int ice_set_vf_spoofchk(struct net_device *netdev, int vf_id, bool ena)
{ struct ice_netdev_priv *np = netdev_priv(netdev); struct ice_pf *pf = np->vsi->back; struct ice_vsi *vf_vsi; struct device *dev; struct ice_vf *vf; int ret;
dev = ice_pf_to_dev(pf);
vf = ice_get_vf_by_id(pf, vf_id); if (!vf) return -EINVAL;
ret = ice_check_vf_ready_for_cfg(vf); if (ret) goto out_put_vf;
vf_vsi = ice_get_vf_vsi(vf); if (!vf_vsi) {
netdev_err(netdev, "VSI %d for VF %d is null\n",
vf->lan_vsi_idx, vf->vf_id);
ret = -EINVAL; goto out_put_vf;
}
if (vf_vsi->type != ICE_VSI_VF) {
netdev_err(netdev, "Type %d of VSI %d for VF %d is no ICE_VSI_VF\n",
vf_vsi->type, vf_vsi->vsi_num, vf->vf_id);
ret = -ENODEV; goto out_put_vf;
}
if (ena == vf->spoofchk) {
dev_dbg(dev, "VF spoofchk already %s\n", ena ? "ON" : "OFF");
ret = 0; goto out_put_vf;
}
ret = ice_vsi_apply_spoofchk(vf_vsi, ena); if (ret)
dev_err(dev, "Failed to set spoofchk %s for VF %d VSI %d\n error %d\n",
ena ? "ON" : "OFF", vf->vf_id, vf_vsi->vsi_num, ret); else
vf->spoofchk = ena;
/** * __ice_set_vf_mac - program VF MAC address * @pf: PF to be configure * @vf_id: VF identifier * @mac: MAC address * * program VF MAC address * Return: zero on success or an error code on failure
*/ int __ice_set_vf_mac(struct ice_pf *pf, u16 vf_id, const u8 *mac)
{ struct device *dev; struct ice_vf *vf; int ret;
dev = ice_pf_to_dev(pf); if (is_multicast_ether_addr(mac)) {
dev_err(dev, "%pM not a valid unicast address\n", mac); return -EINVAL;
}
vf = ice_get_vf_by_id(pf, vf_id); if (!vf) return -EINVAL;
/* nothing left to do, unicast MAC already set */ if (ether_addr_equal(vf->dev_lan_addr, mac) &&
ether_addr_equal(vf->hw_lan_addr, mac)) {
ret = 0; goto out_put_vf;
}
ret = ice_check_vf_ready_for_cfg(vf); if (ret) goto out_put_vf;
mutex_lock(&vf->cfg_lock);
/* VF is notified of its new MAC via the PF's response to the * VIRTCHNL_OP_GET_VF_RESOURCES message after the VF has been reset
*/
ether_addr_copy(vf->dev_lan_addr, mac);
ether_addr_copy(vf->hw_lan_addr, mac); if (is_zero_ether_addr(mac)) { /* VF will send VIRTCHNL_OP_ADD_ETH_ADDR message with its MAC */
vf->pf_set_mac = false;
dev_info(dev, "Removing MAC on VF %d. VF driver will be reinitialized\n",
vf->vf_id);
} else { /* PF will add MAC rule for the VF */
vf->pf_set_mac = true;
dev_info(dev, "Setting MAC %pM on VF %d. VF driver will be reinitialized\n",
mac, vf_id);
}
/** * ice_set_vf_mac - .ndo_set_vf_mac handler * @netdev: network interface device structure * @vf_id: VF identifier * @mac: MAC address * * program VF MAC address * Return: zero on success or an error code on failure
*/ int ice_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac)
{ return __ice_set_vf_mac(ice_netdev_to_pf(netdev), vf_id, mac);
}
/** * ice_set_vf_trust * @netdev: network interface device structure * @vf_id: VF identifier * @trusted: Boolean value to enable/disable trusted VF * * Enable or disable a given VF as trusted
*/ int ice_set_vf_trust(struct net_device *netdev, int vf_id, bool trusted)
{ struct ice_pf *pf = ice_netdev_to_pf(netdev); struct ice_vf *vf; int ret;
vf = ice_get_vf_by_id(pf, vf_id); if (!vf) return -EINVAL;
if (ice_is_eswitch_mode_switchdev(pf)) {
dev_info(ice_pf_to_dev(pf), "Trusted VF is forbidden in switchdev mode\n"); return -EOPNOTSUPP;
}
ret = ice_check_vf_ready_for_cfg(vf); if (ret) goto out_put_vf;
/* Check if already trusted */ if (trusted == vf->trusted) {
ret = 0; goto out_put_vf;
}
mutex_lock(&vf->cfg_lock);
while (!trusted && vf->num_mac_lldp)
ice_vf_update_mac_lldp_num(vf, ice_get_vf_vsi(vf), false);
vf->trusted = trusted;
ice_reset_vf(vf, ICE_VF_RESET_NOTIFY);
dev_info(ice_pf_to_dev(pf), "VF %u is now %strusted\n",
vf_id, trusted ? "" : "un");
mutex_unlock(&vf->cfg_lock);
out_put_vf:
ice_put_vf(vf); return ret;
}
/** * ice_set_vf_link_state * @netdev: network interface device structure * @vf_id: VF identifier * @link_state: required link state * * Set VF's link state, irrespective of physical link state status
*/ int ice_set_vf_link_state(struct net_device *netdev, int vf_id, int link_state)
{ struct ice_pf *pf = ice_netdev_to_pf(netdev); struct ice_vf *vf; int ret;
vf = ice_get_vf_by_id(pf, vf_id); if (!vf) return -EINVAL;
ret = ice_check_vf_ready_for_cfg(vf); if (ret) goto out_put_vf;
switch (link_state) { case IFLA_VF_LINK_STATE_AUTO:
vf->link_forced = false; break; case IFLA_VF_LINK_STATE_ENABLE:
vf->link_forced = true;
vf->link_up = true; break; case IFLA_VF_LINK_STATE_DISABLE:
vf->link_forced = true;
vf->link_up = false; break; default:
ret = -EINVAL; goto out_put_vf;
}
ice_vc_notify_vf_link_state(vf);
out_put_vf:
ice_put_vf(vf); return ret;
}
/** * ice_calc_all_vfs_min_tx_rate - calculate cumulative min Tx rate on all VFs * @pf: PF associated with VFs
*/ staticint ice_calc_all_vfs_min_tx_rate(struct ice_pf *pf)
{ struct ice_vf *vf; unsignedint bkt; int rate = 0;
/** * ice_min_tx_rate_oversubscribed - check if min Tx rate causes oversubscription * @vf: VF trying to configure min_tx_rate * @min_tx_rate: min Tx rate in Mbps * * Check if the min_tx_rate being passed in will cause oversubscription of total * min_tx_rate based on the current link speed and all other VFs configured * min_tx_rate * * Return true if the passed min_tx_rate would cause oversubscription, else * return false
*/ staticbool
ice_min_tx_rate_oversubscribed(struct ice_vf *vf, int min_tx_rate)
{ struct ice_vsi *vsi = ice_get_vf_vsi(vf); int all_vfs_min_tx_rate; int link_speed_mbps;
/* this VF's previous rate is being overwritten */
all_vfs_min_tx_rate -= vf->min_tx_rate;
if (all_vfs_min_tx_rate + min_tx_rate > link_speed_mbps) {
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",
min_tx_rate, vf->vf_id,
all_vfs_min_tx_rate + min_tx_rate - link_speed_mbps,
link_speed_mbps); returntrue;
}
returnfalse;
}
/** * ice_set_vf_bw - set min/max VF bandwidth * @netdev: network interface device structure * @vf_id: VF identifier * @min_tx_rate: Minimum Tx rate in Mbps * @max_tx_rate: Maximum Tx rate in Mbps
*/ int
ice_set_vf_bw(struct net_device *netdev, int vf_id, int min_tx_rate, int max_tx_rate)
{ struct ice_pf *pf = ice_netdev_to_pf(netdev); struct ice_vsi *vsi; struct device *dev; struct ice_vf *vf; int ret;
dev = ice_pf_to_dev(pf);
vf = ice_get_vf_by_id(pf, vf_id); if (!vf) return -EINVAL;
ret = ice_check_vf_ready_for_cfg(vf); if (ret) goto out_put_vf;
vsi = ice_get_vf_vsi(vf); if (!vsi) {
ret = -EINVAL; goto out_put_vf;
}
if (min_tx_rate && ice_is_dcb_active(pf)) {
dev_err(dev, "DCB on PF is currently enabled. VF min Tx rate limiting not allowed on this PF.\n");
ret = -EOPNOTSUPP; goto out_put_vf;
}
if (ice_min_tx_rate_oversubscribed(vf, min_tx_rate)) {
ret = -EINVAL; goto out_put_vf;
}
if (vf->min_tx_rate != (unsignedint)min_tx_rate) {
ret = ice_set_min_bw_limit(vsi, (u64)min_tx_rate * 1000); if (ret) {
dev_err(dev, "Unable to set min-tx-rate for VF %d\n",
vf->vf_id); goto out_put_vf;
}
vf->min_tx_rate = min_tx_rate;
}
if (vf->max_tx_rate != (unsignedint)max_tx_rate) {
ret = ice_set_max_bw_limit(vsi, (u64)max_tx_rate * 1000); if (ret) {
dev_err(dev, "Unable to set max-tx-rate for VF %d\n",
vf->vf_id); goto out_put_vf;
}
vf->max_tx_rate = max_tx_rate;
}
out_put_vf:
ice_put_vf(vf); return ret;
}
/** * ice_get_vf_stats - populate some stats for the VF * @netdev: the netdev of the PF * @vf_id: the host OS identifier (0-255) * @vf_stats: pointer to the OS memory to be initialized
*/ int ice_get_vf_stats(struct net_device *netdev, int vf_id, struct ifla_vf_stats *vf_stats)
{ struct ice_pf *pf = ice_netdev_to_pf(netdev); struct ice_eth_stats *stats; struct ice_vsi *vsi; struct ice_vf *vf; int ret;
vf = ice_get_vf_by_id(pf, vf_id); if (!vf) return -EINVAL;
ret = ice_check_vf_ready_for_cfg(vf); if (ret) goto out_put_vf;
vsi = ice_get_vf_vsi(vf); if (!vsi) {
ret = -EINVAL; goto out_put_vf;
}
/** * ice_is_supported_port_vlan_proto - make sure the vlan_proto is supported * @hw: hardware structure used to check the VLAN mode * @vlan_proto: VLAN TPID being checked * * If the device is configured in Double VLAN Mode (DVM), then both ETH_P_8021Q * and ETH_P_8021AD are supported. If the device is configured in Single VLAN * Mode (SVM), then only ETH_P_8021Q is supported.
*/ staticbool
ice_is_supported_port_vlan_proto(struct ice_hw *hw, u16 vlan_proto)
{ bool is_supported = false;
switch (vlan_proto) { case ETH_P_8021Q:
is_supported = true; break; case ETH_P_8021AD: if (ice_is_dvm_ena(hw))
is_supported = true; break;
}
return is_supported;
}
/** * ice_set_vf_port_vlan * @netdev: network interface device structure * @vf_id: VF identifier * @vlan_id: VLAN ID being set * @qos: priority setting * @vlan_proto: VLAN protocol * * program VF Port VLAN ID and/or QoS
*/ int
ice_set_vf_port_vlan(struct net_device *netdev, int vf_id, u16 vlan_id, u8 qos,
__be16 vlan_proto)
{ struct ice_pf *pf = ice_netdev_to_pf(netdev);
u16 local_vlan_proto = ntohs(vlan_proto); struct device *dev; struct ice_vf *vf; int ret;
dev = ice_pf_to_dev(pf);
if (vlan_id >= VLAN_N_VID || qos > 7) {
dev_err(dev, "Invalid Port VLAN parameters for VF %d, ID %d, QoS %d\n",
vf_id, vlan_id, qos); return -EINVAL;
}
if (!ice_is_supported_port_vlan_proto(&pf->hw, local_vlan_proto)) {
dev_err(dev, "VF VLAN protocol 0x%04x is not supported\n",
local_vlan_proto); return -EPROTONOSUPPORT;
}
vf = ice_get_vf_by_id(pf, vf_id); if (!vf) return -EINVAL;
ret = ice_check_vf_ready_for_cfg(vf); if (ret) goto out_put_vf;
if (ice_vf_get_port_vlan_prio(vf) == qos &&
ice_vf_get_port_vlan_tpid(vf) == local_vlan_proto &&
ice_vf_get_port_vlan_id(vf) == vlan_id) { /* duplicate request, so just return success */
dev_dbg(dev, "Duplicate port VLAN %u, QoS %u, TPID 0x%04x request\n",
vlan_id, qos, local_vlan_proto);
ret = 0; goto out_put_vf;
}
mutex_lock(&vf->cfg_lock);
vf->port_vlan_info = ICE_VLAN(local_vlan_proto, vlan_id, qos); if (ice_vf_is_port_vlan_ena(vf))
dev_info(dev, "Setting VLAN %u, QoS %u, TPID 0x%04x on VF %d\n",
vlan_id, qos, local_vlan_proto, vf_id); else
dev_info(dev, "Clearing port VLAN on VF %d\n", vf_id);
/** * ice_print_vfs_mdd_events - print VFs malicious driver detect event * @pf: pointer to the PF structure * * Called from ice_handle_mdd_event to rate limit and print VFs MDD events.
*/ void ice_print_vfs_mdd_events(struct ice_pf *pf)
{ struct ice_vf *vf; unsignedint bkt;
/* check that there are pending MDD events to print */ if (!test_and_clear_bit(ICE_MDD_VF_PRINT_PENDING, pf->state)) return;
/* VF MDD event logs are rate limited to one second intervals */ if (time_is_after_jiffies(pf->vfs.last_printed_mdd_jiffies + HZ * 1)) return;
pf->vfs.last_printed_mdd_jiffies = jiffies;
mutex_lock(&pf->vfs.table_lock);
ice_for_each_vf(pf, bkt, vf) { /* only print Rx MDD event message if there are new events */ if (vf->mdd_rx_events.count != vf->mdd_rx_events.last_printed) {
vf->mdd_rx_events.last_printed =
vf->mdd_rx_events.count;
ice_print_vf_rx_mdd_event(vf);
}
/* only print Tx MDD event message if there are new events */ if (vf->mdd_tx_events.count != vf->mdd_tx_events.last_printed) {
vf->mdd_tx_events.last_printed =
vf->mdd_tx_events.count;
ice_print_vf_tx_mdd_event(vf);
}
}
mutex_unlock(&pf->vfs.table_lock);
}
/** * ice_restore_all_vfs_msi_state - restore VF MSI state after PF FLR * @pf: pointer to the PF structure * * Called when recovering from a PF FLR to restore interrupt capability to * the VFs.
*/ void ice_restore_all_vfs_msi_state(struct ice_pf *pf)
{ struct ice_vf *vf;
u32 bkt;
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