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Message-ID: <20170208234127.3041579-5-tom@herbertland.com>
Date: Wed, 8 Feb 2017 15:41:23 -0800
From: Tom Herbert <tom@...bertland.com>
To: <netdev@...r.kernel.org>
CC: <kernel-team@...com>
Subject: [PATCH RFC v2 4/8] qede: Changes to use generic XDP infrastructure
Change XDP program management functional interface to correspond to new
XDP API.
Signed-off-by: Tom Herbert <tom@...bertland.com>
---
drivers/net/ethernet/qlogic/qede/qede.h | 3 +-
drivers/net/ethernet/qlogic/qede/qede_ethtool.c | 2 +-
drivers/net/ethernet/qlogic/qede/qede_filter.c | 39 ++++++++++---------------
drivers/net/ethernet/qlogic/qede/qede_fp.c | 36 +++++++++++++----------
drivers/net/ethernet/qlogic/qede/qede_main.c | 23 ++++-----------
5 files changed, 44 insertions(+), 59 deletions(-)
diff --git a/drivers/net/ethernet/qlogic/qede/qede.h b/drivers/net/ethernet/qlogic/qede/qede.h
index b423406..e1baf88 100644
--- a/drivers/net/ethernet/qlogic/qede/qede.h
+++ b/drivers/net/ethernet/qlogic/qede/qede.h
@@ -213,10 +213,9 @@ struct qede_dev {
u16 geneve_dst_port;
bool wol_enabled;
+ bool xdp_enabled;
struct qede_rdma_dev rdma_info;
-
- struct bpf_prog *xdp_prog;
};
enum QEDE_STATE {
diff --git a/drivers/net/ethernet/qlogic/qede/qede_ethtool.c b/drivers/net/ethernet/qlogic/qede/qede_ethtool.c
index baf2642..5559d6e 100644
--- a/drivers/net/ethernet/qlogic/qede/qede_ethtool.c
+++ b/drivers/net/ethernet/qlogic/qede/qede_ethtool.c
@@ -341,7 +341,7 @@ static int qede_get_sset_count(struct net_device *dev, int stringset)
num_stats += QEDE_RSS_COUNT(edev) * QEDE_NUM_RQSTATS;
/* Account for XDP statistics [if needed] */
- if (edev->xdp_prog)
+ if (edev->xdp_enabled)
num_stats += QEDE_RSS_COUNT(edev) * QEDE_NUM_TQSTATS;
return num_stats;
diff --git a/drivers/net/ethernet/qlogic/qede/qede_filter.c b/drivers/net/ethernet/qlogic/qede/qede_filter.c
index 107c3fd..9c9db44 100644
--- a/drivers/net/ethernet/qlogic/qede/qede_filter.c
+++ b/drivers/net/ethernet/qlogic/qede/qede_filter.c
@@ -426,7 +426,7 @@ int qede_set_features(struct net_device *dev, netdev_features_t features)
* aggregations, so no need to actually reload.
*/
__qede_lock(edev);
- if (edev->xdp_prog)
+ if (edev->xdp_enabled)
args.func(edev, &args);
else
qede_reload(edev, &args, true);
@@ -506,29 +506,21 @@ void qede_udp_tunnel_del(struct net_device *dev, struct udp_tunnel_info *ti)
schedule_delayed_work(&edev->sp_task, 0);
}
-static void qede_xdp_reload_func(struct qede_dev *edev,
- struct qede_reload_args *args)
+static int qede_xdp_check_bpf(struct qede_dev *edev, struct bpf_prog *prog)
{
- struct bpf_prog *old;
-
- old = xchg(&edev->xdp_prog, args->u.new_prog);
- if (old)
- bpf_prog_put(old);
-}
-
-static int qede_xdp_set(struct qede_dev *edev, struct bpf_prog *prog)
-{
- struct qede_reload_args args;
-
if (prog && prog->xdp_adjust_head) {
DP_ERR(edev, "Does not support bpf_xdp_adjust_head()\n");
return -EOPNOTSUPP;
}
- /* If we're called, there was already a bpf reference increment */
- args.func = &qede_xdp_reload_func;
- args.u.new_prog = prog;
- qede_reload(edev, &args, false);
+ return 0;
+}
+
+static int qede_xdp_init(struct qede_dev *edev, bool enable)
+{
+ edev->xdp_enabled = enable;
+
+ qede_reload(edev, NULL, false);
return 0;
}
@@ -538,11 +530,12 @@ int qede_xdp(struct net_device *dev, struct netdev_xdp *xdp)
struct qede_dev *edev = netdev_priv(dev);
switch (xdp->command) {
- case XDP_SETUP_PROG:
- return qede_xdp_set(edev, xdp->prog);
- case XDP_QUERY_PROG:
- xdp->prog_attached = !!edev->xdp_prog;
- return 0;
+ case XDP_MODE_OFF:
+ return qede_xdp_init(edev, true);
+ case XDP_MODE_ON:
+ return qede_xdp_init(edev, false);
+ case XDP_CHECK_BPF_PROG:
+ return qede_xdp_check_bpf(edev, xdp->prog);
default:
return -EINVAL;
}
diff --git a/drivers/net/ethernet/qlogic/qede/qede_fp.c b/drivers/net/ethernet/qlogic/qede/qede_fp.c
index 26848ee..af885c3 100644
--- a/drivers/net/ethernet/qlogic/qede/qede_fp.c
+++ b/drivers/net/ethernet/qlogic/qede/qede_fp.c
@@ -40,6 +40,7 @@
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <net/ip6_checksum.h>
+#include <net/xdp.h>
#include <linux/qed/qed_if.h>
#include "qede.h"
@@ -987,13 +988,14 @@ static bool qede_pkt_is_ip_fragmented(struct eth_fast_path_rx_reg_cqe *cqe,
static bool qede_rx_xdp(struct qede_dev *edev,
struct qede_fastpath *fp,
struct qede_rx_queue *rxq,
- struct bpf_prog *prog,
struct sw_rx_data *bd,
struct eth_fast_path_rx_reg_cqe *cqe)
{
u16 len = le16_to_cpu(cqe->len_on_first_bd);
struct xdp_buff xdp;
enum xdp_action act;
+ struct xdp_hook *last_hook;
+ bool retval = false;
xdp.data = page_address(bd->data) + cqe->placement_offset;
xdp.data_end = xdp.data + len;
@@ -1003,11 +1005,13 @@ static bool qede_rx_xdp(struct qede_dev *edev,
* side for map helpers.
*/
rcu_read_lock();
- act = bpf_prog_run_xdp(prog, &xdp);
- rcu_read_unlock();
- if (act == XDP_PASS)
- return true;
+ act = xdp_hook_run_ret_last(&fp->napi, &xdp, &last_hook);
+
+ if (act == XDP_PASS) {
+ retval = true;
+ goto out;
+ }
/* Count number of packets not to be passed to stack */
rxq->xdp_no_pass++;
@@ -1017,8 +1021,8 @@ static bool qede_rx_xdp(struct qede_dev *edev,
/* We need the replacement buffer before transmit. */
if (qede_alloc_rx_buffer(rxq, true)) {
qede_recycle_rx_bd_ring(rxq, 1);
- trace_xdp_exception(edev->ndev, prog, act);
- return false;
+ trace_xdp_hook_exception(edev->ndev, last_hook, act);
+ goto out;
}
/* Now if there's a transmission problem, we'd still have to
@@ -1028,22 +1032,25 @@ static bool qede_rx_xdp(struct qede_dev *edev,
dma_unmap_page(rxq->dev, bd->mapping,
PAGE_SIZE, DMA_BIDIRECTIONAL);
__free_page(bd->data);
- trace_xdp_exception(edev->ndev, prog, act);
+ trace_xdp_hook_exception(edev->ndev, last_hook, act);
}
/* Regardless, we've consumed an Rx BD */
qede_rx_bd_ring_consume(rxq);
- return false;
+ goto out;
default:
- bpf_warn_invalid_xdp_action(act);
+ xdp_warn_invalid_action(act);
case XDP_ABORTED:
- trace_xdp_exception(edev->ndev, prog, act);
+ trace_xdp_hook_exception(edev->ndev, last_hook, act);
case XDP_DROP:
qede_recycle_rx_bd_ring(rxq, cqe->bd_num);
}
- return false;
+out:
+ rcu_read_unlock();
+
+ return retval;
}
static struct sk_buff *qede_rx_allocate_skb(struct qede_dev *edev,
@@ -1188,7 +1195,6 @@ static int qede_rx_process_cqe(struct qede_dev *edev,
struct qede_fastpath *fp,
struct qede_rx_queue *rxq)
{
- struct bpf_prog *xdp_prog = READ_ONCE(rxq->xdp_prog);
struct eth_fast_path_rx_reg_cqe *fp_cqe;
u16 len, pad, bd_cons_idx, parse_flag;
enum eth_rx_cqe_type cqe_type;
@@ -1226,8 +1232,8 @@ static int qede_rx_process_cqe(struct qede_dev *edev,
pad = fp_cqe->placement_offset;
/* Run eBPF program if one is attached */
- if (xdp_prog)
- if (!qede_rx_xdp(edev, fp, rxq, xdp_prog, bd, fp_cqe))
+ if (xdp_hook_run_needed_check(edev->ndev, &fp->napi))
+ if (!qede_rx_xdp(edev, fp, rxq, bd, fp_cqe))
return 1;
/* If this is an error packet then drop it */
diff --git a/drivers/net/ethernet/qlogic/qede/qede_main.c b/drivers/net/ethernet/qlogic/qede/qede_main.c
index 40a76a1..91babcc 100644
--- a/drivers/net/ethernet/qlogic/qede/qede_main.c
+++ b/drivers/net/ethernet/qlogic/qede/qede_main.c
@@ -560,7 +560,7 @@ static void qede_init_ndev(struct qede_dev *edev)
{
struct net_device *ndev = edev->ndev;
struct pci_dev *pdev = edev->pdev;
- u32 hw_features;
+ netdev_features_t hw_features;
pci_set_drvdata(pdev, ndev);
@@ -580,7 +580,7 @@ static void qede_init_ndev(struct qede_dev *edev)
/* user-changeble features */
hw_features = NETIF_F_GRO | NETIF_F_SG |
NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
- NETIF_F_TSO | NETIF_F_TSO6;
+ NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_XDP;
/* Encap features*/
hw_features |= NETIF_F_GSO_GRE | NETIF_F_GSO_UDP_TUNNEL |
@@ -709,7 +709,7 @@ static int qede_alloc_fp_array(struct qede_dev *edev)
if (!fp->rxq)
goto err;
- if (edev->xdp_prog) {
+ if (edev->xdp_enabled) {
fp->xdp_tx = kzalloc(sizeof(*fp->xdp_tx),
GFP_KERNEL);
if (!fp->xdp_tx)
@@ -913,10 +913,6 @@ static void __qede_remove(struct pci_dev *pdev, enum qede_remove_mode mode)
pci_set_drvdata(pdev, NULL);
- /* Release edev's reference to XDP's bpf if such exist */
- if (edev->xdp_prog)
- bpf_prog_put(edev->xdp_prog);
-
free_netdev(ndev);
/* Use global ops since we've freed edev */
@@ -1069,7 +1065,7 @@ static int qede_alloc_sge_mem(struct qede_dev *edev, struct qede_rx_queue *rxq)
int i;
/* Don't perform FW aggregations in case of XDP */
- if (edev->xdp_prog)
+ if (edev->xdp_enabled)
edev->gro_disable = 1;
if (edev->gro_disable)
@@ -1127,7 +1123,7 @@ static int qede_alloc_mem_rxq(struct qede_dev *edev, struct qede_rx_queue *rxq)
/* Segment size to spilt a page in multiple equal parts,
* unless XDP is used in which case we'd use the entire page.
*/
- if (!edev->xdp_prog)
+ if (!edev->xdp_enabled)
rxq->rx_buf_seg_size = roundup_pow_of_two(rxq->rx_buf_size);
else
rxq->rx_buf_seg_size = PAGE_SIZE;
@@ -1580,8 +1576,6 @@ static int qede_stop_queues(struct qede_dev *edev)
rc = qede_stop_txq(edev, fp->xdp_tx, i);
if (rc)
return rc;
-
- bpf_prog_put(fp->rxq->xdp_prog);
}
}
@@ -1724,13 +1718,6 @@ static int qede_start_queues(struct qede_dev *edev, bool clear_stats)
rc = qede_start_txq(edev, fp, fp->xdp_tx, i, XDP_PI);
if (rc)
goto out;
-
- fp->rxq->xdp_prog = bpf_prog_add(edev->xdp_prog, 1);
- if (IS_ERR(fp->rxq->xdp_prog)) {
- rc = PTR_ERR(fp->rxq->xdp_prog);
- fp->rxq->xdp_prog = NULL;
- goto out;
- }
}
if (fp->type & QEDE_FASTPATH_TX) {
--
2.9.3
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