summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/intel/ice/ice_lib.c
diff options
context:
space:
mode:
authorBenjamin Mikailenko <benjamin.mikailenko@intel.com>2022-11-18 16:20:02 -0500
committerTony Nguyen <anthony.l.nguyen@intel.com>2022-11-23 08:59:43 -0800
commit288ecf491b1654845ae99c79b7fefad2d3ea47bd (patch)
tree06c454e0531ac3b73918b0b6629425507c7f15ad /drivers/net/ethernet/intel/ice/ice_lib.c
parent2fd5e433cd2685d4af471209e48be1a951687193 (diff)
downloadlwn-288ecf491b1654845ae99c79b7fefad2d3ea47bd.tar.gz
lwn-288ecf491b1654845ae99c79b7fefad2d3ea47bd.zip
ice: Accumulate ring statistics over reset
Resets may occur with or without user interaction. For example, a TX hang or reconfiguration of parameters will result in a reset. During reset, the VSI is freed, freeing any statistics structures inside as well. This would create an issue for the user where a reset happens in the background, statistics set to zero, and the user checks ring statistics expecting them to be populated. To ensure this doesn't happen, accumulate ring statistics over reset. Define a new ring statistics structure, ice_ring_stats. The new structure lives in the VSI's parent, preserving ring statistics when VSI is freed. 1. Define a new structure vsi_ring_stats in the PF scope 2. Allocate/free stats only during probe, unload, or change in ring size 3. Replace previous ring statistics functionality with new structure Signed-off-by: Benjamin Mikailenko <benjamin.mikailenko@intel.com> Tested-by: Gurucharan G <gurucharanx.g@intel.com> (A Contingent worker at Intel) Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/ice/ice_lib.c')
-rw-r--r--drivers/net/ethernet/intel/ice/ice_lib.c233
1 files changed, 225 insertions, 8 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
index ffb455e1f3dc..94aa834cd9a6 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -448,6 +448,49 @@ static irqreturn_t ice_eswitch_msix_clean_rings(int __always_unused irq, void *d
}
/**
+ * ice_vsi_alloc_stat_arrays - Allocate statistics arrays
+ * @vsi: VSI pointer
+ */
+static int ice_vsi_alloc_stat_arrays(struct ice_vsi *vsi)
+{
+ struct ice_vsi_stats *vsi_stat;
+ struct ice_pf *pf = vsi->back;
+
+ if (vsi->type == ICE_VSI_CHNL)
+ return 0;
+ if (!pf->vsi_stats)
+ return -ENOENT;
+
+ vsi_stat = kzalloc(sizeof(*vsi_stat), GFP_KERNEL);
+ if (!vsi_stat)
+ return -ENOMEM;
+
+ vsi_stat->tx_ring_stats =
+ kcalloc(vsi->alloc_txq, sizeof(*vsi_stat->tx_ring_stats),
+ GFP_KERNEL);
+ if (!vsi_stat->tx_ring_stats)
+ goto err_alloc_tx;
+
+ vsi_stat->rx_ring_stats =
+ kcalloc(vsi->alloc_rxq, sizeof(*vsi_stat->rx_ring_stats),
+ GFP_KERNEL);
+ if (!vsi_stat->rx_ring_stats)
+ goto err_alloc_rx;
+
+ pf->vsi_stats[vsi->idx] = vsi_stat;
+
+ return 0;
+
+err_alloc_rx:
+ kfree(vsi_stat->rx_ring_stats);
+err_alloc_tx:
+ kfree(vsi_stat->tx_ring_stats);
+ kfree(vsi_stat);
+ pf->vsi_stats[vsi->idx] = NULL;
+ return -ENOMEM;
+}
+
+/**
* ice_vsi_alloc - Allocates the next available struct VSI in the PF
* @pf: board private structure
* @vsi_type: type of VSI
@@ -560,6 +603,11 @@ ice_vsi_alloc(struct ice_pf *pf, enum ice_vsi_type vsi_type,
if (vsi->type == ICE_VSI_CTRL && vf)
vf->ctrl_vsi_idx = vsi->idx;
+
+ /* allocate memory for Tx/Rx ring stat pointers */
+ if (ice_vsi_alloc_stat_arrays(vsi))
+ goto err_rings;
+
goto unlock_pf;
err_rings:
@@ -1536,6 +1584,106 @@ err_out:
}
/**
+ * ice_vsi_free_stats - Free the ring statistics structures
+ * @vsi: VSI pointer
+ */
+static void ice_vsi_free_stats(struct ice_vsi *vsi)
+{
+ struct ice_vsi_stats *vsi_stat;
+ struct ice_pf *pf = vsi->back;
+ int i;
+
+ if (vsi->type == ICE_VSI_CHNL)
+ return;
+ if (!pf->vsi_stats)
+ return;
+
+ vsi_stat = pf->vsi_stats[vsi->idx];
+ if (!vsi_stat)
+ return;
+
+ ice_for_each_alloc_txq(vsi, i) {
+ if (vsi_stat->tx_ring_stats[i]) {
+ kfree_rcu(vsi_stat->tx_ring_stats[i], rcu);
+ WRITE_ONCE(vsi_stat->tx_ring_stats[i], NULL);
+ }
+ }
+
+ ice_for_each_alloc_rxq(vsi, i) {
+ if (vsi_stat->rx_ring_stats[i]) {
+ kfree_rcu(vsi_stat->rx_ring_stats[i], rcu);
+ WRITE_ONCE(vsi_stat->rx_ring_stats[i], NULL);
+ }
+ }
+
+ kfree(vsi_stat->tx_ring_stats);
+ kfree(vsi_stat->rx_ring_stats);
+ kfree(vsi_stat);
+ pf->vsi_stats[vsi->idx] = NULL;
+}
+
+/**
+ * ice_vsi_alloc_ring_stats - Allocates Tx and Rx ring stats for the VSI
+ * @vsi: VSI which is having stats allocated
+ */
+static int ice_vsi_alloc_ring_stats(struct ice_vsi *vsi)
+{
+ struct ice_ring_stats **tx_ring_stats;
+ struct ice_ring_stats **rx_ring_stats;
+ struct ice_vsi_stats *vsi_stats;
+ struct ice_pf *pf = vsi->back;
+ u16 i;
+
+ vsi_stats = pf->vsi_stats[vsi->idx];
+ tx_ring_stats = vsi_stats->tx_ring_stats;
+ rx_ring_stats = vsi_stats->rx_ring_stats;
+
+ /* Allocate Tx ring stats */
+ ice_for_each_alloc_txq(vsi, i) {
+ struct ice_ring_stats *ring_stats;
+ struct ice_tx_ring *ring;
+
+ ring = vsi->tx_rings[i];
+ ring_stats = tx_ring_stats[i];
+
+ if (!ring_stats) {
+ ring_stats = kzalloc(sizeof(*ring_stats), GFP_KERNEL);
+ if (!ring_stats)
+ goto err_out;
+
+ WRITE_ONCE(tx_ring_stats[i], ring_stats);
+ }
+
+ ring->ring_stats = ring_stats;
+ }
+
+ /* Allocate Rx ring stats */
+ ice_for_each_alloc_rxq(vsi, i) {
+ struct ice_ring_stats *ring_stats;
+ struct ice_rx_ring *ring;
+
+ ring = vsi->rx_rings[i];
+ ring_stats = rx_ring_stats[i];
+
+ if (!ring_stats) {
+ ring_stats = kzalloc(sizeof(*ring_stats), GFP_KERNEL);
+ if (!ring_stats)
+ goto err_out;
+
+ WRITE_ONCE(rx_ring_stats[i], ring_stats);
+ }
+
+ ring->ring_stats = ring_stats;
+ }
+
+ return 0;
+
+err_out:
+ ice_vsi_free_stats(vsi);
+ return -ENOMEM;
+}
+
+/**
* ice_vsi_manage_rss_lut - disable/enable RSS
* @vsi: the VSI being changed
* @ena: boolean value indicating if this is an enable or disable request
@@ -2580,6 +2728,10 @@ ice_vsi_setup(struct ice_pf *pf, struct ice_port_info *pi,
if (ret)
goto unroll_vector_base;
+ ret = ice_vsi_alloc_ring_stats(vsi);
+ if (ret)
+ goto unroll_vector_base;
+
ice_vsi_map_rings_to_vectors(vsi);
/* ICE_VSI_CTRL does not need RSS so skip RSS processing */
@@ -2618,6 +2770,9 @@ ice_vsi_setup(struct ice_pf *pf, struct ice_port_info *pi,
if (ret)
goto unroll_vector_base;
+ ret = ice_vsi_alloc_ring_stats(vsi);
+ if (ret)
+ goto unroll_vector_base;
/* Do not exit if configuring RSS had an issue, at least
* receive traffic on first queue. Hence no need to capture
* return value
@@ -2631,6 +2786,11 @@ ice_vsi_setup(struct ice_pf *pf, struct ice_port_info *pi,
ret = ice_vsi_alloc_rings(vsi);
if (ret)
goto unroll_vsi_init;
+
+ ret = ice_vsi_alloc_ring_stats(vsi);
+ if (ret)
+ goto unroll_vector_base;
+
break;
default:
/* clean up the resources and exit */
@@ -2690,6 +2850,7 @@ unroll_vector_base:
unroll_alloc_q_vector:
ice_vsi_free_q_vectors(vsi);
unroll_vsi_init:
+ ice_vsi_free_stats(vsi);
ice_vsi_delete(vsi);
unroll_get_qs:
ice_vsi_put_qs(vsi);
@@ -3081,7 +3242,7 @@ int ice_vsi_release(struct ice_vsi *vsi)
vsi->agg_node && vsi->agg_node->valid)
vsi->agg_node->num_vsis--;
ice_vsi_clear_rings(vsi);
-
+ ice_vsi_free_stats(vsi);
ice_vsi_put_qs(vsi);
/* retain SW VSI data structure since it is needed to unregister and
@@ -3209,6 +3370,47 @@ ice_vsi_rebuild_set_coalesce(struct ice_vsi *vsi,
}
/**
+ * ice_vsi_realloc_stat_arrays - Frees unused stat structures
+ * @vsi: VSI pointer
+ * @prev_txq: Number of Tx rings before ring reallocation
+ * @prev_rxq: Number of Rx rings before ring reallocation
+ */
+static int
+ice_vsi_realloc_stat_arrays(struct ice_vsi *vsi, int prev_txq, int prev_rxq)
+{
+ struct ice_vsi_stats *vsi_stat;
+ struct ice_pf *pf = vsi->back;
+ int i;
+
+ if (!prev_txq || !prev_rxq)
+ return 0;
+ if (vsi->type == ICE_VSI_CHNL)
+ return 0;
+
+ vsi_stat = pf->vsi_stats[vsi->idx];
+
+ if (vsi->num_txq < prev_txq) {
+ for (i = vsi->num_txq; i < prev_txq; i++) {
+ if (vsi_stat->tx_ring_stats[i]) {
+ kfree_rcu(vsi_stat->tx_ring_stats[i], rcu);
+ WRITE_ONCE(vsi_stat->tx_ring_stats[i], NULL);
+ }
+ }
+ }
+
+ if (vsi->num_rxq < prev_rxq) {
+ for (i = vsi->num_rxq; i < prev_rxq; i++) {
+ if (vsi_stat->rx_ring_stats[i]) {
+ kfree_rcu(vsi_stat->rx_ring_stats[i], rcu);
+ WRITE_ONCE(vsi_stat->rx_ring_stats[i], NULL);
+ }
+ }
+ }
+
+ return 0;
+}
+
+/**
* ice_vsi_rebuild - Rebuild VSI after reset
* @vsi: VSI to be rebuild
* @init_vsi: is this an initialization or a reconfigure of the VSI
@@ -3219,10 +3421,10 @@ int ice_vsi_rebuild(struct ice_vsi *vsi, bool init_vsi)
{
u16 max_txqs[ICE_MAX_TRAFFIC_CLASS] = { 0 };
struct ice_coalesce_stored *coalesce;
+ int ret, i, prev_txq, prev_rxq;
int prev_num_q_vectors = 0;
enum ice_vsi_type vtype;
struct ice_pf *pf;
- int ret, i;
if (!vsi)
return -EINVAL;
@@ -3241,6 +3443,9 @@ int ice_vsi_rebuild(struct ice_vsi *vsi, bool init_vsi)
prev_num_q_vectors = ice_vsi_rebuild_get_coalesce(vsi, coalesce);
+ prev_txq = vsi->num_txq;
+ prev_rxq = vsi->num_rxq;
+
ice_rm_vsi_lan_cfg(vsi->port_info, vsi->idx);
ret = ice_rm_vsi_rdma_cfg(vsi->port_info, vsi->idx);
if (ret)
@@ -3307,6 +3512,10 @@ int ice_vsi_rebuild(struct ice_vsi *vsi, bool init_vsi)
if (ret)
goto err_vectors;
+ ret = ice_vsi_alloc_ring_stats(vsi);
+ if (ret)
+ goto err_vectors;
+
ice_vsi_map_rings_to_vectors(vsi);
vsi->stat_offsets_loaded = false;
@@ -3346,6 +3555,10 @@ int ice_vsi_rebuild(struct ice_vsi *vsi, bool init_vsi)
if (ret)
goto err_vectors;
+ ret = ice_vsi_alloc_ring_stats(vsi);
+ if (ret)
+ goto err_vectors;
+
vsi->stat_offsets_loaded = false;
break;
case ICE_VSI_CHNL:
@@ -3394,6 +3607,10 @@ int ice_vsi_rebuild(struct ice_vsi *vsi, bool init_vsi)
return ice_schedule_reset(pf, ICE_RESET_PFR);
}
}
+
+ if (ice_vsi_realloc_stat_arrays(vsi, prev_txq, prev_rxq))
+ goto err_vectors;
+
ice_vsi_rebuild_set_coalesce(vsi, coalesce, prev_num_q_vectors);
kfree(coalesce);
@@ -3735,9 +3952,9 @@ static void ice_update_ring_stats(struct ice_q_stats *stats, u64 pkts, u64 bytes
*/
void ice_update_tx_ring_stats(struct ice_tx_ring *tx_ring, u64 pkts, u64 bytes)
{
- u64_stats_update_begin(&tx_ring->syncp);
- ice_update_ring_stats(&tx_ring->stats, pkts, bytes);
- u64_stats_update_end(&tx_ring->syncp);
+ u64_stats_update_begin(&tx_ring->ring_stats->syncp);
+ ice_update_ring_stats(&tx_ring->ring_stats->stats, pkts, bytes);
+ u64_stats_update_end(&tx_ring->ring_stats->syncp);
}
/**
@@ -3748,9 +3965,9 @@ void ice_update_tx_ring_stats(struct ice_tx_ring *tx_ring, u64 pkts, u64 bytes)
*/
void ice_update_rx_ring_stats(struct ice_rx_ring *rx_ring, u64 pkts, u64 bytes)
{
- u64_stats_update_begin(&rx_ring->syncp);
- ice_update_ring_stats(&rx_ring->stats, pkts, bytes);
- u64_stats_update_end(&rx_ring->syncp);
+ u64_stats_update_begin(&rx_ring->ring_stats->syncp);
+ ice_update_ring_stats(&rx_ring->ring_stats->stats, pkts, bytes);
+ u64_stats_update_end(&rx_ring->ring_stats->syncp);
}
/**