1 files changed, 461 insertions, 2 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
index 6ba82337d017..232ca06974ea 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -346,7 +346,7 @@ void ice_vsi_delete(struct ice_vsi *vsi)
  * @vsi: pointer to VSI being cleared
  * @free_qvectors: bool to specify if q_vectors should be deallocated
  */
-void ice_vsi_free_arrays(struct ice_vsi *vsi, bool free_qvectors)
+static void ice_vsi_free_arrays(struct ice_vsi *vsi, bool free_qvectors)
 {
 	struct ice_pf *pf = vsi->back;
 
@@ -424,6 +424,141 @@ irqreturn_t ice_msix_clean_rings(int __always_unused irq, void *data)
 }
 
 /**
+ * ice_vsi_get_qs_contig - Assign a contiguous chunk of queues to VSI
+ * @vsi: the VSI getting queues
+ *
+ * Return 0 on success and a negative value on error
+ */
+static int ice_vsi_get_qs_contig(struct ice_vsi *vsi)
+{
+	struct ice_pf *pf = vsi->back;
+	int offset, ret = 0;
+
+	mutex_lock(&pf->avail_q_mutex);
+	/* look for contiguous block of queues for Tx */
+	offset = bitmap_find_next_zero_area(pf->avail_txqs, ICE_MAX_TXQS,
+					    0, vsi->alloc_txq, 0);
+	if (offset < ICE_MAX_TXQS) {
+		int i;
+
+		bitmap_set(pf->avail_txqs, offset, vsi->alloc_txq);
+		for (i = 0; i < vsi->alloc_txq; i++)
+			vsi->txq_map[i] = i + offset;
+	} else {
+		ret = -ENOMEM;
+		vsi->tx_mapping_mode = ICE_VSI_MAP_SCATTER;
+	}
+
+	/* look for contiguous block of queues for Rx */
+	offset = bitmap_find_next_zero_area(pf->avail_rxqs, ICE_MAX_RXQS,
+					    0, vsi->alloc_rxq, 0);
+	if (offset < ICE_MAX_RXQS) {
+		int i;
+
+		bitmap_set(pf->avail_rxqs, offset, vsi->alloc_rxq);
+		for (i = 0; i < vsi->alloc_rxq; i++)
+			vsi->rxq_map[i] = i + offset;
+	} else {
+		ret = -ENOMEM;
+		vsi->rx_mapping_mode = ICE_VSI_MAP_SCATTER;
+	}
+	mutex_unlock(&pf->avail_q_mutex);
+
+	return ret;
+}
+
+/**
+ * ice_vsi_get_qs_scatter - Assign a scattered queues to VSI
+ * @vsi: the VSI getting queues
+ *
+ * Return 0 on success and a negative value on error
+ */
+static int ice_vsi_get_qs_scatter(struct ice_vsi *vsi)
+{
+	struct ice_pf *pf = vsi->back;
+	int i, index = 0;
+
+	mutex_lock(&pf->avail_q_mutex);
+
+	if (vsi->tx_mapping_mode == ICE_VSI_MAP_SCATTER) {
+		for (i = 0; i < vsi->alloc_txq; i++) {
+			index = find_next_zero_bit(pf->avail_txqs,
+						   ICE_MAX_TXQS, index);
+			if (index < ICE_MAX_TXQS) {
+				set_bit(index, pf->avail_txqs);
+				vsi->txq_map[i] = index;
+			} else {
+				goto err_scatter_tx;
+			}
+		}
+	}
+
+	if (vsi->rx_mapping_mode == ICE_VSI_MAP_SCATTER) {
+		for (i = 0; i < vsi->alloc_rxq; i++) {
+			index = find_next_zero_bit(pf->avail_rxqs,
+						   ICE_MAX_RXQS, index);
+			if (index < ICE_MAX_RXQS) {
+				set_bit(index, pf->avail_rxqs);
+				vsi->rxq_map[i] = index;
+			} else {
+				goto err_scatter_rx;
+			}
+		}
+	}
+
+	mutex_unlock(&pf->avail_q_mutex);
+	return 0;
+
+err_scatter_rx:
+	/* unflag any queues we have grabbed (i is failed position) */
+	for (index = 0; index < i; index++) {
+		clear_bit(vsi->rxq_map[index], pf->avail_rxqs);
+		vsi->rxq_map[index] = 0;
+	}
+	i = vsi->alloc_txq;
+err_scatter_tx:
+	/* i is either position of failed attempt or vsi->alloc_txq */
+	for (index = 0; index < i; index++) {
+		clear_bit(vsi->txq_map[index], pf->avail_txqs);
+		vsi->txq_map[index] = 0;
+	}
+
+	mutex_unlock(&pf->avail_q_mutex);
+	return -ENOMEM;
+}
+
+/**
+ * ice_vsi_get_qs - Assign queues from PF to VSI
+ * @vsi: the VSI to assign queues to
+ *
+ * Returns 0 on success and a negative value on error
+ */
+int ice_vsi_get_qs(struct ice_vsi *vsi)
+{
+	int ret = 0;
+
+	vsi->tx_mapping_mode = ICE_VSI_MAP_CONTIG;
+	vsi->rx_mapping_mode = ICE_VSI_MAP_CONTIG;
+
+	/* NOTE: ice_vsi_get_qs_contig() will set the Rx/Tx mapping
+	 * modes individually to scatter if assigning contiguous queues
+	 * to Rx or Tx fails
+	 */
+	ret = ice_vsi_get_qs_contig(vsi);
+	if (ret < 0) {
+		if (vsi->tx_mapping_mode == ICE_VSI_MAP_SCATTER)
+			vsi->alloc_txq = max_t(u16, vsi->alloc_txq,
+					       ICE_MAX_SCATTER_TXQS);
+		if (vsi->rx_mapping_mode == ICE_VSI_MAP_SCATTER)
+			vsi->alloc_rxq = max_t(u16, vsi->alloc_rxq,
+					       ICE_MAX_SCATTER_RXQS);
+		ret = ice_vsi_get_qs_scatter(vsi);
+	}
+
+	return ret;
+}
+
+/**
  * ice_vsi_put_qs - Release queues from VSI to PF
  * @vsi: the VSI that is going to release queues
  */
@@ -448,6 +583,22 @@ void ice_vsi_put_qs(struct ice_vsi *vsi)
 }
 
 /**
+ * ice_rss_clean - Delete RSS related VSI structures that hold user inputs
+ * @vsi: the VSI being removed
+ */
+static void ice_rss_clean(struct ice_vsi *vsi)
+{
+	struct ice_pf *pf;
+
+	pf = vsi->back;
+
+	if (vsi->rss_hkey_user)
+		devm_kfree(&pf->pdev->dev, vsi->rss_hkey_user);
+	if (vsi->rss_lut_user)
+		devm_kfree(&pf->pdev->dev, vsi->rss_lut_user);
+}
+
+/**
  * ice_vsi_set_rss_params - Setup RSS capabilities per VSI type
  * @vsi: the VSI being configured
  */
@@ -686,10 +837,182 @@ int ice_vsi_init(struct ice_vsi *vsi)
 }
 
 /**
+ * ice_free_q_vector - Free memory allocated for a specific interrupt vector
+ * @vsi: VSI having the memory freed
+ * @v_idx: index of the vector to be freed
+ */
+static void ice_free_q_vector(struct ice_vsi *vsi, int v_idx)
+{
+	struct ice_q_vector *q_vector;
+	struct ice_ring *ring;
+
+	if (!vsi->q_vectors[v_idx]) {
+		dev_dbg(&vsi->back->pdev->dev, "Queue vector at index %d not found\n",
+			v_idx);
+		return;
+	}
+	q_vector = vsi->q_vectors[v_idx];
+
+	ice_for_each_ring(ring, q_vector->tx)
+		ring->q_vector = NULL;
+	ice_for_each_ring(ring, q_vector->rx)
+		ring->q_vector = NULL;
+
+	/* only VSI with an associated netdev is set up with NAPI */
+	if (vsi->netdev)
+		netif_napi_del(&q_vector->napi);
+
+	devm_kfree(&vsi->back->pdev->dev, q_vector);
+	vsi->q_vectors[v_idx] = NULL;
+}
+
+/**
+ * ice_vsi_free_q_vectors - Free memory allocated for interrupt vectors
+ * @vsi: the VSI having memory freed
+ */
+void ice_vsi_free_q_vectors(struct ice_vsi *vsi)
+{
+	int v_idx;
+
+	for (v_idx = 0; v_idx < vsi->num_q_vectors; v_idx++)
+		ice_free_q_vector(vsi, v_idx);
+}
+
+/**
+ * ice_vsi_alloc_q_vector - Allocate memory for a single interrupt vector
+ * @vsi: the VSI being configured
+ * @v_idx: index of the vector in the VSI struct
+ *
+ * We allocate one q_vector.  If allocation fails we return -ENOMEM.
+ */
+static int ice_vsi_alloc_q_vector(struct ice_vsi *vsi, int v_idx)
+{
+	struct ice_pf *pf = vsi->back;
+	struct ice_q_vector *q_vector;
+
+	/* allocate q_vector */
+	q_vector = devm_kzalloc(&pf->pdev->dev, sizeof(*q_vector), GFP_KERNEL);
+	if (!q_vector)
+		return -ENOMEM;
+
+	q_vector->vsi = vsi;
+	q_vector->v_idx = v_idx;
+	/* only set affinity_mask if the CPU is online */
+	if (cpu_online(v_idx))
+		cpumask_set_cpu(v_idx, &q_vector->affinity_mask);
+
+	/* This will not be called in the driver load path because the netdev
+	 * will not be created yet. All other cases with register the NAPI
+	 * handler here (i.e. resume, reset/rebuild, etc.)
+	 */
+	if (vsi->netdev)
+		netif_napi_add(vsi->netdev, &q_vector->napi, ice_napi_poll,
+			       NAPI_POLL_WEIGHT);
+
+	/* tie q_vector and VSI together */
+	vsi->q_vectors[v_idx] = q_vector;
+
+	return 0;
+}
+
+/**
+ * ice_vsi_alloc_q_vectors - Allocate memory for interrupt vectors
+ * @vsi: the VSI being configured
+ *
+ * We allocate one q_vector per queue interrupt.  If allocation fails we
+ * return -ENOMEM.
+ */
+int ice_vsi_alloc_q_vectors(struct ice_vsi *vsi)
+{
+	struct ice_pf *pf = vsi->back;
+	int v_idx = 0, num_q_vectors;
+	int err;
+
+	if (vsi->q_vectors[0]) {
+		dev_dbg(&pf->pdev->dev, "VSI %d has existing q_vectors\n",
+			vsi->vsi_num);
+		return -EEXIST;
+	}
+
+	if (test_bit(ICE_FLAG_MSIX_ENA, pf->flags)) {
+		num_q_vectors = vsi->num_q_vectors;
+	} else {
+		err = -EINVAL;
+		goto err_out;
+	}
+
+	for (v_idx = 0; v_idx < num_q_vectors; v_idx++) {
+		err = ice_vsi_alloc_q_vector(vsi, v_idx);
+		if (err)
+			goto err_out;
+	}
+
+	return 0;
+
+err_out:
+	while (v_idx--)
+		ice_free_q_vector(vsi, v_idx);
+
+	dev_err(&pf->pdev->dev,
+		"Failed to allocate %d q_vector for VSI %d, ret=%d\n",
+		vsi->num_q_vectors, vsi->vsi_num, err);
+	vsi->num_q_vectors = 0;
+	return err;
+}
+
+/**
+ * ice_vsi_setup_vector_base - Set up the base vector for the given VSI
+ * @vsi: ptr to the VSI
+ *
+ * This should only be called after ice_vsi_alloc() which allocates the
+ * corresponding SW VSI structure and initializes num_queue_pairs for the
+ * newly allocated VSI.
+ *
+ * Returns 0 on success or negative on failure
+ */
+int ice_vsi_setup_vector_base(struct ice_vsi *vsi)
+{
+	struct ice_pf *pf = vsi->back;
+	int num_q_vectors = 0;
+
+	if (vsi->base_vector) {
+		dev_dbg(&pf->pdev->dev, "VSI %d has non-zero base vector %d\n",
+			vsi->vsi_num, vsi->base_vector);
+		return -EEXIST;
+	}
+
+	if (!test_bit(ICE_FLAG_MSIX_ENA, pf->flags))
+		return -ENOENT;
+
+	switch (vsi->type) {
+	case ICE_VSI_PF:
+		num_q_vectors = vsi->num_q_vectors;
+		break;
+	default:
+		dev_warn(&vsi->back->pdev->dev, "Unknown VSI type %d\n",
+			 vsi->type);
+		break;
+	}
+
+	if (num_q_vectors)
+		vsi->base_vector = ice_get_res(pf, pf->irq_tracker,
+					       num_q_vectors, vsi->idx);
+
+	if (vsi->base_vector < 0) {
+		dev_err(&pf->pdev->dev,
+			"Failed to get tracking for %d vectors for VSI %d, err=%d\n",
+			num_q_vectors, vsi->vsi_num, vsi->base_vector);
+		return -ENOENT;
+	}
+
+	return 0;
+}
+
+/**
  * ice_vsi_clear_rings - Deallocates the Tx and Rx rings for VSI
  * @vsi: the VSI having rings deallocated
  */
-void ice_vsi_clear_rings(struct ice_vsi *vsi)
+static void ice_vsi_clear_rings(struct ice_vsi *vsi)
 {
 	int i;
 
@@ -1675,6 +1998,142 @@ void ice_vsi_dis_irq(struct ice_vsi *vsi)
 }
 
 /**
+ * ice_vsi_release - Delete a VSI and free its resources
+ * @vsi: the VSI being removed
+ *
+ * Returns 0 on success or < 0 on error
+ */
+int ice_vsi_release(struct ice_vsi *vsi)
+{
+	struct ice_pf *pf;
+
+	if (!vsi->back)
+		return -ENODEV;
+	pf = vsi->back;
+	/* do not unregister and free netdevs while driver is in the reset
+	 * recovery pending state. Since reset/rebuild happens through PF
+	 * service task workqueue, its not a good idea to unregister netdev
+	 * that is associated to the PF that is running the work queue items
+	 * currently. This is done to avoid check_flush_dependency() warning
+	 * on this wq
+	 */
+	if (vsi->netdev && !ice_is_reset_recovery_pending(pf->state)) {
+		unregister_netdev(vsi->netdev);
+		free_netdev(vsi->netdev);
+		vsi->netdev = NULL;
+	}
+
+	if (test_bit(ICE_FLAG_RSS_ENA, pf->flags))
+		ice_rss_clean(vsi);
+
+	/* Disable VSI and free resources */
+	ice_vsi_dis_irq(vsi);
+	ice_vsi_close(vsi);
+
+	/* reclaim interrupt vectors back to PF */
+	ice_free_res(vsi->back->irq_tracker, vsi->base_vector, vsi->idx);
+	pf->num_avail_msix += vsi->num_q_vectors;
+
+	ice_remove_vsi_fltr(&pf->hw, vsi->vsi_num);
+	ice_vsi_delete(vsi);
+	ice_vsi_free_q_vectors(vsi);
+	ice_vsi_clear_rings(vsi);
+
+	ice_vsi_put_qs(vsi);
+	pf->q_left_tx += vsi->alloc_txq;
+	pf->q_left_rx += vsi->alloc_rxq;
+
+	/* retain SW VSI data structure since it is needed to unregister and
+	 * free VSI netdev when PF is not in reset recovery pending state,\
+	 * for ex: during rmmod.
+	 */
+	if (!ice_is_reset_recovery_pending(pf->state))
+		ice_vsi_clear(vsi);
+
+	return 0;
+}
+
+/**
+ * ice_vsi_rebuild - Rebuild VSI after reset
+ * @vsi: VSI to be rebuild
+ *
+ * Returns 0 on success and negative value on failure
+ */
+int ice_vsi_rebuild(struct ice_vsi *vsi)
+{
+	u16 max_txqs[ICE_MAX_TRAFFIC_CLASS] = { 0 };
+	int ret, i;
+
+	if (!vsi)
+		return -EINVAL;
+
+	ice_vsi_free_q_vectors(vsi);
+	ice_free_res(vsi->back->irq_tracker, vsi->base_vector, vsi->idx);
+	vsi->base_vector = 0;
+	ice_vsi_clear_rings(vsi);
+	ice_vsi_free_arrays(vsi, false);
+	ice_vsi_set_num_qs(vsi);
+
+	/* Initialize VSI struct elements and create VSI in FW */
+	ret = ice_vsi_init(vsi);
+	if (ret < 0)
+		goto err_vsi;
+
+	ret = ice_vsi_alloc_arrays(vsi, false);
+	if (ret < 0)
+		goto err_vsi;
+
+	switch (vsi->type) {
+	case ICE_VSI_PF:
+		ret = ice_vsi_alloc_q_vectors(vsi);
+		if (ret)
+			goto err_rings;
+
+		ret = ice_vsi_setup_vector_base(vsi);
+		if (ret)
+			goto err_vectors;
+
+		ret = ice_vsi_alloc_rings(vsi);
+		if (ret)
+			goto err_vectors;
+
+		ice_vsi_map_rings_to_vectors(vsi);
+		break;
+	default:
+		break;
+	}
+
+	ice_vsi_set_tc_cfg(vsi);
+
+	/* configure VSI nodes based on number of queues and TC's */
+	for (i = 0; i < vsi->tc_cfg.numtc; i++)
+		max_txqs[i] = vsi->num_txq;
+
+	ret = ice_cfg_vsi_lan(vsi->port_info, vsi->vsi_num,
+			      vsi->tc_cfg.ena_tc, max_txqs);
+	if (ret) {
+		dev_info(&vsi->back->pdev->dev,
+			 "Failed VSI lan queue config\n");
+		goto err_vectors;
+	}
+	return 0;
+
+err_vectors:
+	ice_vsi_free_q_vectors(vsi);
+err_rings:
+	if (vsi->netdev) {
+		vsi->current_netdev_flags = 0;
+		unregister_netdev(vsi->netdev);
+		free_netdev(vsi->netdev);
+		vsi->netdev = NULL;
+	}
+err_vsi:
+	ice_vsi_clear(vsi);
+	set_bit(__ICE_RESET_FAILED, vsi->back->state);
+	return ret;
+}
+
+/**
  * ice_is_reset_recovery_pending - schedule a reset
  * @state: pf state field
  */