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Message-Id: <20231221220218.197386-10-michael.chan@broadcom.com>
Date: Thu, 21 Dec 2023 14:02:14 -0800
From: Michael Chan <michael.chan@...adcom.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
edumazet@...gle.com,
kuba@...nel.org,
pabeni@...hat.com,
pavan.chebbi@...adcom.com,
andrew.gospodarek@...adcom.com
Subject: [PATCH net-next 09/13] bnxt_en: Refactor the hash table logic for ntuple filters.
Generalize the ethtool logic that walks the ntuple hash table now that
we have the common bnxt_filter_base structure. This will allow the code
to easily extend to cover user defined ntuple or ether filters.
Reviewed-by: Vasundhara Volam <vasundhara-v.volam@...adcom.com>
Reviewed-by: Andy Gospodarek <andrew.gospodarek@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 1 +
drivers/net/ethernet/broadcom/bnxt/bnxt.h | 1 +
.../net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 85 +++++++++++++------
3 files changed, 59 insertions(+), 28 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index f5d6c746f677..186c7dde51e2 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -5611,6 +5611,7 @@ static int bnxt_hwrm_cfa_ntuple_filter_free(struct bnxt *bp,
struct hwrm_cfa_ntuple_filter_free_input *req;
int rc;
+ set_bit(BNXT_FLTR_FW_DELETED, &fltr->base.state);
rc = hwrm_req_init(bp, req, HWRM_CFA_NTUPLE_FILTER_FREE);
if (rc)
return rc;
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 73e2fe705caf..f37d98d7962a 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -1349,6 +1349,7 @@ struct bnxt_filter_base {
unsigned long state;
#define BNXT_FLTR_VALID 0
#define BNXT_FLTR_INSERTED 1
+#define BNXT_FLTR_FW_DELETED 2
struct rcu_head rcu;
};
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index 65edad2cfeab..8cc762a12a3e 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -1012,28 +1012,60 @@ static int bnxt_set_channels(struct net_device *dev,
}
#ifdef CONFIG_RFS_ACCEL
-static int bnxt_grxclsrlall(struct bnxt *bp, struct ethtool_rxnfc *cmd,
- u32 *rule_locs)
+static u32 bnxt_get_all_fltr_ids_rcu(struct bnxt *bp, struct hlist_head tbl[],
+ int tbl_size, u32 *ids, u32 start,
+ u32 id_cnt)
{
- int i, j = 0;
+ int i, j = start;
- cmd->data = bp->ntp_fltr_count;
- for (i = 0; i < BNXT_NTP_FLTR_HASH_SIZE; i++) {
+ if (j >= id_cnt)
+ return j;
+ for (i = 0; i < tbl_size; i++) {
struct hlist_head *head;
- struct bnxt_ntuple_filter *fltr;
+ struct bnxt_filter_base *fltr;
- head = &bp->ntp_fltr_hash_tbl[i];
- rcu_read_lock();
- hlist_for_each_entry_rcu(fltr, head, base.hash) {
- if (j == cmd->rule_cnt)
- break;
- rule_locs[j++] = fltr->base.sw_id;
+ head = &tbl[i];
+ hlist_for_each_entry_rcu(fltr, head, hash) {
+ if (!fltr->flags ||
+ test_bit(BNXT_FLTR_FW_DELETED, &fltr->state))
+ continue;
+ ids[j++] = fltr->sw_id;
+ if (j == id_cnt)
+ return j;
}
- rcu_read_unlock();
- if (j == cmd->rule_cnt)
- break;
}
- cmd->rule_cnt = j;
+ return j;
+}
+
+static struct bnxt_filter_base *bnxt_get_one_fltr_rcu(struct bnxt *bp,
+ struct hlist_head tbl[],
+ int tbl_size, u32 id)
+{
+ int i;
+
+ for (i = 0; i < tbl_size; i++) {
+ struct hlist_head *head;
+ struct bnxt_filter_base *fltr;
+
+ head = &tbl[i];
+ hlist_for_each_entry_rcu(fltr, head, hash) {
+ if (fltr->flags && fltr->sw_id == id)
+ return fltr;
+ }
+ }
+ return NULL;
+}
+
+static int bnxt_grxclsrlall(struct bnxt *bp, struct ethtool_rxnfc *cmd,
+ u32 *rule_locs)
+{
+ cmd->data = bp->ntp_fltr_count;
+ rcu_read_lock();
+ cmd->rule_cnt = bnxt_get_all_fltr_ids_rcu(bp, bp->ntp_fltr_hash_tbl,
+ BNXT_NTP_FLTR_HASH_SIZE,
+ rule_locs, 0, cmd->rule_cnt);
+ rcu_read_unlock();
+
return 0;
}
@@ -1041,27 +1073,24 @@ static int bnxt_grxclsrule(struct bnxt *bp, struct ethtool_rxnfc *cmd)
{
struct ethtool_rx_flow_spec *fs =
(struct ethtool_rx_flow_spec *)&cmd->fs;
+ struct bnxt_filter_base *fltr_base;
struct bnxt_ntuple_filter *fltr;
struct flow_keys *fkeys;
- int i, rc = -EINVAL;
+ int rc = -EINVAL;
if (fs->location >= BNXT_NTP_FLTR_MAX_FLTR)
return rc;
- for (i = 0; i < BNXT_NTP_FLTR_HASH_SIZE; i++) {
- struct hlist_head *head;
-
- head = &bp->ntp_fltr_hash_tbl[i];
- rcu_read_lock();
- hlist_for_each_entry_rcu(fltr, head, base.hash) {
- if (fltr->base.sw_id == fs->location)
- goto fltr_found;
- }
+ rcu_read_lock();
+ fltr_base = bnxt_get_one_fltr_rcu(bp, bp->ntp_fltr_hash_tbl,
+ BNXT_NTP_FLTR_HASH_SIZE,
+ fs->location);
+ if (!fltr_base) {
rcu_read_unlock();
+ return rc;
}
- return rc;
+ fltr = container_of(fltr_base, struct bnxt_ntuple_filter, base);
-fltr_found:
fkeys = &fltr->fkeys;
if (fkeys->basic.n_proto == htons(ETH_P_IP)) {
if (fkeys->basic.ip_proto == IPPROTO_TCP)
--
2.30.1
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