[PATCH v2 net-next 20/26] i40e: add XDP and XSK generic per-channel statistics
From: Alexander Lobakin
Date: Tue Nov 23 2021 - 11:43:01 EST
Make i40e driver collect and provide all generic XDP/XSK counters.
Unfortunately, XDP rings have a lifetime of an XDP prog, and all
ring stats structures get wiped on xsk_pool attach/detach, so
store them in a separate array with a lifetime of a VSI.
Reuse all previously introduced helpers and
xdp_get_drv_stats_generic(). Performance wavering from incrementing
a bunch of counters on hotpath is around stddev at [64 ... 1532]
frame sizes.
Signed-off-by: Alexander Lobakin <alexandr.lobakin@xxxxxxxxx>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@xxxxxxxxx>
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@xxxxxxxxxxxxxxx>
---
drivers/net/ethernet/intel/i40e/i40e.h | 1 +
drivers/net/ethernet/intel/i40e/i40e_main.c | 38 +++++++++++++++++++-
drivers/net/ethernet/intel/i40e/i40e_txrx.c | 40 +++++++++++++++++----
drivers/net/ethernet/intel/i40e/i40e_txrx.h | 1 +
drivers/net/ethernet/intel/i40e/i40e_xsk.c | 33 +++++++++++++----
5 files changed, 99 insertions(+), 14 deletions(-)
diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index 4d939af0a626..2e2a3936332f 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -942,6 +942,7 @@ struct i40e_vsi {
irqreturn_t (*irq_handler)(int irq, void *data);
unsigned long *af_xdp_zc_qps; /* tracks AF_XDP ZC enabled qps */
+ struct xdp_drv_stats *xdp_stats; /* XDP/XSK stats array */
} ____cacheline_internodealigned_in_smp;
struct i40e_netdev_priv {
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index e118cf9265c7..e3619fc13630 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -11087,7 +11087,7 @@ static int i40e_set_num_rings_in_vsi(struct i40e_vsi *vsi)
static int i40e_vsi_alloc_arrays(struct i40e_vsi *vsi, bool alloc_qvectors)
{
struct i40e_ring **next_rings;
- int size;
+ int size, i;
int ret = 0;
/* allocate memory for both Tx, XDP Tx and Rx ring pointers */
@@ -11103,6 +11103,15 @@ static int i40e_vsi_alloc_arrays(struct i40e_vsi *vsi, bool alloc_qvectors)
}
vsi->rx_rings = next_rings;
+ vsi->xdp_stats = kcalloc(vsi->alloc_queue_pairs,
+ sizeof(*vsi->xdp_stats),
+ GFP_KERNEL);
+ if (!vsi->xdp_stats)
+ goto err_xdp_stats;
+
+ for (i = 0; i < vsi->alloc_queue_pairs; i++)
+ xdp_init_drv_stats(vsi->xdp_stats + i);
+
if (alloc_qvectors) {
/* allocate memory for q_vector pointers */
size = sizeof(struct i40e_q_vector *) * vsi->num_q_vectors;
@@ -11115,6 +11124,10 @@ static int i40e_vsi_alloc_arrays(struct i40e_vsi *vsi, bool alloc_qvectors)
return ret;
err_vectors:
+ kfree(vsi->xdp_stats);
+ vsi->xdp_stats = NULL;
+
+err_xdp_stats:
kfree(vsi->tx_rings);
return ret;
}
@@ -11225,6 +11238,10 @@ static void i40e_vsi_free_arrays(struct i40e_vsi *vsi, bool free_qvectors)
kfree(vsi->q_vectors);
vsi->q_vectors = NULL;
}
+
+ kfree(vsi->xdp_stats);
+ vsi->xdp_stats = NULL;
+
kfree(vsi->tx_rings);
vsi->tx_rings = NULL;
vsi->rx_rings = NULL;
@@ -11347,6 +11364,7 @@ static int i40e_alloc_rings(struct i40e_vsi *vsi)
if (vsi->back->hw_features & I40E_HW_WB_ON_ITR_CAPABLE)
ring->flags = I40E_TXR_FLAGS_WB_ON_ITR;
ring->itr_setting = pf->tx_itr_default;
+ ring->xdp_stats = vsi->xdp_stats + i;
WRITE_ONCE(vsi->tx_rings[i], ring++);
if (!i40e_enabled_xdp_vsi(vsi))
@@ -11365,6 +11383,7 @@ static int i40e_alloc_rings(struct i40e_vsi *vsi)
ring->flags = I40E_TXR_FLAGS_WB_ON_ITR;
set_ring_xdp(ring);
ring->itr_setting = pf->tx_itr_default;
+ ring->xdp_stats = vsi->xdp_stats + i;
WRITE_ONCE(vsi->xdp_rings[i], ring++);
setup_rx:
@@ -11378,6 +11397,7 @@ static int i40e_alloc_rings(struct i40e_vsi *vsi)
ring->size = 0;
ring->dcb_tc = 0;
ring->itr_setting = pf->rx_itr_default;
+ ring->xdp_stats = vsi->xdp_stats + i;
WRITE_ONCE(vsi->rx_rings[i], ring);
}
@@ -13308,6 +13328,19 @@ static int i40e_xdp(struct net_device *dev,
}
}
+static int i40e_get_xdp_stats_nch(const struct net_device *dev, u32 attr_id)
+{
+ const struct i40e_netdev_priv *np = netdev_priv(dev);
+
+ switch (attr_id) {
+ case IFLA_XDP_XSTATS_TYPE_XDP:
+ case IFLA_XDP_XSTATS_TYPE_XSK:
+ return np->vsi->alloc_queue_pairs;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
static const struct net_device_ops i40e_netdev_ops = {
.ndo_open = i40e_open,
.ndo_stop = i40e_close,
@@ -13343,6 +13376,8 @@ static const struct net_device_ops i40e_netdev_ops = {
.ndo_bpf = i40e_xdp,
.ndo_xdp_xmit = i40e_xdp_xmit,
.ndo_xsk_wakeup = i40e_xsk_wakeup,
+ .ndo_get_xdp_stats_nch = i40e_get_xdp_stats_nch,
+ .ndo_get_xdp_stats = xdp_get_drv_stats_generic,
.ndo_dfwd_add_station = i40e_fwd_add,
.ndo_dfwd_del_station = i40e_fwd_del,
};
@@ -13487,6 +13522,7 @@ static int i40e_config_netdev(struct i40e_vsi *vsi)
netdev->netdev_ops = &i40e_netdev_ops;
netdev->watchdog_timeo = 5 * HZ;
i40e_set_ethtool_ops(netdev);
+ netdev->xstats = vsi->xdp_stats;
/* MTU range: 68 - 9706 */
netdev->min_mtu = ETH_MIN_MTU;
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
index 10a83e5385c7..8854004fbec3 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
@@ -1027,8 +1027,11 @@ static bool i40e_clean_tx_irq(struct i40e_vsi *vsi,
i40e_update_tx_stats(tx_ring, total_packets, total_bytes);
i40e_arm_wb(tx_ring, vsi, budget);
- if (ring_is_xdp(tx_ring))
+ if (ring_is_xdp(tx_ring)) {
+ xdp_update_tx_drv_stats(&tx_ring->xdp_stats->xdp_tx,
+ total_packets, total_bytes);
return !!budget;
+ }
/* notify netdev of completed buffers */
netdev_tx_completed_queue(txring_txq(tx_ring),
@@ -2290,8 +2293,10 @@ int i40e_xmit_xdp_tx_ring(struct xdp_buff *xdp, struct i40e_ring *xdp_ring)
* i40e_run_xdp - run an XDP program
* @rx_ring: Rx ring being processed
* @xdp: XDP buffer containing the frame
+ * @lrstats: onstack Rx XDP stats
**/
-static int i40e_run_xdp(struct i40e_ring *rx_ring, struct xdp_buff *xdp)
+static int i40e_run_xdp(struct i40e_ring *rx_ring, struct xdp_buff *xdp,
+ struct xdp_rx_drv_stats_local *lrstats)
{
int err, result = I40E_XDP_PASS;
struct i40e_ring *xdp_ring;
@@ -2303,33 +2308,48 @@ static int i40e_run_xdp(struct i40e_ring *rx_ring, struct xdp_buff *xdp)
if (!xdp_prog)
goto xdp_out;
+ lrstats->bytes += xdp->data_end - xdp->data;
+ lrstats->packets++;
+
prefetchw(xdp->data_hard_start); /* xdp_frame write */
act = bpf_prog_run_xdp(xdp_prog, xdp);
switch (act) {
case XDP_PASS:
+ lrstats->pass++;
break;
case XDP_TX:
xdp_ring = rx_ring->vsi->xdp_rings[rx_ring->queue_index];
result = i40e_xmit_xdp_tx_ring(xdp, xdp_ring);
- if (result == I40E_XDP_CONSUMED)
+ if (result == I40E_XDP_CONSUMED) {
+ lrstats->tx_errors++;
goto out_failure;
+ }
+ lrstats->tx++;
break;
case XDP_REDIRECT:
err = xdp_do_redirect(rx_ring->netdev, xdp, xdp_prog);
- if (err)
+ if (err) {
+ lrstats->redirect_errors++;
goto out_failure;
+ }
result = I40E_XDP_REDIR;
+ lrstats->redirect++;
break;
default:
bpf_warn_invalid_xdp_action(act);
- fallthrough;
+ lrstats->invalid++;
+ goto out_failure;
case XDP_ABORTED:
+ lrstats->aborted++;
out_failure:
trace_xdp_exception(rx_ring->netdev, xdp_prog, act);
- fallthrough; /* handle aborts by dropping packet */
+ /* handle aborts by dropping packet */
+ result = I40E_XDP_CONSUMED;
+ break;
case XDP_DROP:
result = I40E_XDP_CONSUMED;
+ lrstats->drop++;
break;
}
xdp_out:
@@ -2441,6 +2461,7 @@ static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget)
{
unsigned int total_rx_bytes = 0, total_rx_packets = 0, frame_sz = 0;
u16 cleaned_count = I40E_DESC_UNUSED(rx_ring);
+ struct xdp_rx_drv_stats_local lrstats = { };
unsigned int offset = rx_ring->rx_offset;
struct sk_buff *skb = rx_ring->skb;
unsigned int xdp_xmit = 0;
@@ -2512,7 +2533,7 @@ static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget)
/* At larger PAGE_SIZE, frame_sz depend on len size */
xdp.frame_sz = i40e_rx_frame_truesize(rx_ring, size);
#endif
- xdp_res = i40e_run_xdp(rx_ring, &xdp);
+ xdp_res = i40e_run_xdp(rx_ring, &xdp, &lrstats);
}
if (xdp_res) {
@@ -2569,6 +2590,7 @@ static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget)
rx_ring->skb = skb;
i40e_update_rx_stats(rx_ring, total_rx_bytes, total_rx_packets);
+ xdp_update_rx_drv_stats(&rx_ring->xdp_stats->xdp_rx, &lrstats);
/* guarantee a trip back through this routine if there was a failure */
return failure ? budget : (int)total_rx_packets;
@@ -3696,6 +3718,7 @@ static int i40e_xmit_xdp_ring(struct xdp_frame *xdpf,
dma_addr_t dma;
if (!unlikely(I40E_DESC_UNUSED(xdp_ring))) {
+ xdp_update_tx_drv_full(&xdp_ring->xdp_stats->xdp_tx);
xdp_ring->tx_stats.tx_busy++;
return I40E_XDP_CONSUMED;
}
@@ -3923,5 +3946,8 @@ int i40e_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames,
if (unlikely(flags & XDP_XMIT_FLUSH))
i40e_xdp_ring_update_tail(xdp_ring);
+ if (unlikely(nxmit < n))
+ xdp_update_tx_drv_err(&xdp_ring->xdp_stats->xdp_tx, n - nxmit);
+
return nxmit;
}
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.h b/drivers/net/ethernet/intel/i40e/i40e_txrx.h
index bfc2845c99d1..dcfcf20e2ea9 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.h
@@ -368,6 +368,7 @@ struct i40e_ring {
struct i40e_tx_queue_stats tx_stats;
struct i40e_rx_queue_stats rx_stats;
};
+ struct xdp_drv_stats *xdp_stats;
unsigned int size; /* length of descriptor ring in bytes */
dma_addr_t dma; /* physical address of ring */
diff --git a/drivers/net/ethernet/intel/i40e/i40e_xsk.c b/drivers/net/ethernet/intel/i40e/i40e_xsk.c
index ea06e957393e..54c5b8abbb53 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_xsk.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_xsk.c
@@ -143,16 +143,21 @@ int i40e_xsk_pool_setup(struct i40e_vsi *vsi, struct xsk_buff_pool *pool,
* i40e_run_xdp_zc - Executes an XDP program on an xdp_buff
* @rx_ring: Rx ring
* @xdp: xdp_buff used as input to the XDP program
+ * @lrstats: onstack Rx XDP stats structure
*
* Returns any of I40E_XDP_{PASS, CONSUMED, TX, REDIR}
**/
-static int i40e_run_xdp_zc(struct i40e_ring *rx_ring, struct xdp_buff *xdp)
+static int i40e_run_xdp_zc(struct i40e_ring *rx_ring, struct xdp_buff *xdp,
+ struct xdp_rx_drv_stats_local *lrstats)
{
int err, result = I40E_XDP_PASS;
struct i40e_ring *xdp_ring;
struct bpf_prog *xdp_prog;
u32 act;
+ lrstats->bytes += xdp->data_end - xdp->data;
+ lrstats->packets++;
+
/* NB! xdp_prog will always be !NULL, due to the fact that
* this path is enabled by setting an XDP program.
*/
@@ -161,29 +166,41 @@ static int i40e_run_xdp_zc(struct i40e_ring *rx_ring, struct xdp_buff *xdp)
if (likely(act == XDP_REDIRECT)) {
err = xdp_do_redirect(rx_ring->netdev, xdp, xdp_prog);
- if (err)
+ if (err) {
+ lrstats->redirect_errors++;
goto out_failure;
+ }
+ lrstats->redirect++;
return I40E_XDP_REDIR;
}
switch (act) {
case XDP_PASS:
+ lrstats->pass++;
break;
case XDP_TX:
xdp_ring = rx_ring->vsi->xdp_rings[rx_ring->queue_index];
result = i40e_xmit_xdp_tx_ring(xdp, xdp_ring);
- if (result == I40E_XDP_CONSUMED)
+ if (result == I40E_XDP_CONSUMED) {
+ lrstats->tx_errors++;
goto out_failure;
+ }
+ lrstats->tx++;
break;
default:
bpf_warn_invalid_xdp_action(act);
- fallthrough;
+ lrstats->invalid++;
+ goto out_failure;
case XDP_ABORTED:
+ lrstats->aborted++;
out_failure:
trace_xdp_exception(rx_ring->netdev, xdp_prog, act);
- fallthrough; /* handle aborts by dropping packet */
+ /* handle aborts by dropping packet */
+ result = I40E_XDP_CONSUMED;
+ break;
case XDP_DROP:
result = I40E_XDP_CONSUMED;
+ lrstats->drop++;
break;
}
return result;
@@ -325,6 +342,7 @@ int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget)
{
unsigned int total_rx_bytes = 0, total_rx_packets = 0;
u16 cleaned_count = I40E_DESC_UNUSED(rx_ring);
+ struct xdp_rx_drv_stats_local lrstats = { };
u16 next_to_clean = rx_ring->next_to_clean;
u16 count_mask = rx_ring->count - 1;
unsigned int xdp_res, xdp_xmit = 0;
@@ -366,7 +384,7 @@ int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget)
xsk_buff_set_size(bi, size);
xsk_buff_dma_sync_for_cpu(bi, rx_ring->xsk_pool);
- xdp_res = i40e_run_xdp_zc(rx_ring, bi);
+ xdp_res = i40e_run_xdp_zc(rx_ring, bi, &lrstats);
i40e_handle_xdp_result_zc(rx_ring, bi, rx_desc, &rx_packets,
&rx_bytes, size, xdp_res);
total_rx_packets += rx_packets;
@@ -383,6 +401,7 @@ int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget)
i40e_finalize_xdp_rx(rx_ring, xdp_xmit);
i40e_update_rx_stats(rx_ring, total_rx_bytes, total_rx_packets);
+ xdp_update_rx_drv_stats(&rx_ring->xdp_stats->xsk_rx, &lrstats);
if (xsk_uses_need_wakeup(rx_ring->xsk_pool)) {
if (failure || next_to_clean == rx_ring->next_to_use)
@@ -489,6 +508,8 @@ static bool i40e_xmit_zc(struct i40e_ring *xdp_ring, unsigned int budget)
i40e_xdp_ring_update_tail(xdp_ring);
i40e_update_tx_stats(xdp_ring, nb_pkts, total_bytes);
+ xdp_update_tx_drv_stats(&xdp_ring->xdp_stats->xsk_tx, nb_pkts,
+ total_bytes);
return nb_pkts < budget;
}
--
2.33.1