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Date: Thu, 18 Mar 2021 15:32:14 +0530
From: Naveen Mamindlapalli <naveenm@...vell.com>
To: <netdev@...r.kernel.org>, <davem@...emloft.net>, <kuba@...nel.org>
CC: <sgoutham@...vell.com>, <sbhatta@...vell.com>,
<hkelam@...vell.com>, <jerinj@...vell.com>, <lcherian@...vell.com>,
<gakula@...vell.com>, "Naveen Mamindlapalli" <naveenm@...vell.com>
Subject: [PATCH net-next 3/4] octeontx2-pf: add tc flower stats handler for hw offloads
Add support to get the stats for tc flower flows that are
offloaded to hardware. To support this feature, added a
new AF mbox handler which returns the MCAM entry stats
for a flow that has hardware stat counter enabled.
Signed-off-by: Naveen Mamindlapalli <naveenm@...vell.com>
---
drivers/net/ethernet/marvell/octeontx2/af/mbox.h | 14 +++++
.../net/ethernet/marvell/octeontx2/af/rvu_npc.c | 39 ++++++++++++
.../net/ethernet/marvell/octeontx2/nic/otx2_tc.c | 70 +++++++++++++++++++++-
3 files changed, 122 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
index 46f919625464..3af4d0ffcf7c 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
@@ -216,6 +216,9 @@ M(NPC_MCAM_READ_ENTRY, 0x600f, npc_mcam_read_entry, \
npc_mcam_read_entry_rsp) \
M(NPC_MCAM_READ_BASE_RULE, 0x6011, npc_read_base_steer_rule, \
msg_req, npc_mcam_read_base_rule_rsp) \
+M(NPC_MCAM_GET_STATS, 0x6012, npc_mcam_entry_stats, \
+ npc_mcam_get_stats_req, \
+ npc_mcam_get_stats_rsp) \
/* NIX mbox IDs (range 0x8000 - 0xFFFF) */ \
M(NIX_LF_ALLOC, 0x8000, nix_lf_alloc, \
nix_lf_alloc_req, nix_lf_alloc_rsp) \
@@ -1195,6 +1198,17 @@ struct npc_mcam_read_base_rule_rsp {
struct mcam_entry entry;
};
+struct npc_mcam_get_stats_req {
+ struct mbox_msghdr hdr;
+ u16 entry; /* mcam entry */
+};
+
+struct npc_mcam_get_stats_rsp {
+ struct mbox_msghdr hdr;
+ u64 stat; /* counter stats */
+ u8 stat_ena; /* enabled */
+};
+
enum ptp_op {
PTP_OP_ADJFINE = 0,
PTP_OP_GET_CLOCK = 1,
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
index 6cce7ecad007..03248d280e47 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
@@ -2806,3 +2806,42 @@ int rvu_mbox_handler_npc_read_base_steer_rule(struct rvu *rvu,
out:
return rc;
}
+
+int rvu_mbox_handler_npc_mcam_entry_stats(struct rvu *rvu,
+ struct npc_mcam_get_stats_req *req,
+ struct npc_mcam_get_stats_rsp *rsp)
+{
+ struct npc_mcam *mcam = &rvu->hw->mcam;
+ u16 index, cntr;
+ int blkaddr;
+ u64 regval;
+ u32 bank;
+
+ blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPC, 0);
+ if (blkaddr < 0)
+ return NPC_MCAM_INVALID_REQ;
+
+ mutex_lock(&mcam->lock);
+
+ index = req->entry & (mcam->banksize - 1);
+ bank = npc_get_bank(mcam, req->entry);
+
+ /* read MCAM entry STAT_ACT register */
+ regval = rvu_read64(rvu, blkaddr, NPC_AF_MCAMEX_BANKX_STAT_ACT(index, bank));
+
+ if (!(regval & BIT_ULL(9))) {
+ rsp->stat_ena = 0;
+ mutex_unlock(&mcam->lock);
+ return 0;
+ }
+
+ cntr = regval & 0x1FF;
+
+ rsp->stat_ena = 1;
+ rsp->stat = rvu_read64(rvu, blkaddr, NPC_AF_MATCH_STATX(cntr));
+ rsp->stat &= BIT_ULL(48) - 1;
+
+ mutex_unlock(&mcam->lock);
+
+ return 0;
+}
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c
index a361eec568a2..43ef6303ed84 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c
@@ -16,12 +16,20 @@
#include "otx2_common.h"
+struct otx2_tc_flow_stats {
+ u64 bytes;
+ u64 pkts;
+ u64 used;
+};
+
struct otx2_tc_flow {
struct rhash_head node;
unsigned long cookie;
u16 entry;
unsigned int bitpos;
struct rcu_head rcu;
+ struct otx2_tc_flow_stats stats;
+ spinlock_t lock; /* lock for stats */
};
static int otx2_tc_parse_actions(struct otx2_nic *nic,
@@ -403,6 +411,66 @@ static int otx2_tc_add_flow(struct otx2_nic *nic,
return rc;
}
+static int otx2_tc_get_flow_stats(struct otx2_nic *nic,
+ struct flow_cls_offload *tc_flow_cmd)
+{
+ struct otx2_tc_info *tc_info = &nic->tc_info;
+ struct npc_mcam_get_stats_req *req;
+ struct npc_mcam_get_stats_rsp *rsp;
+ struct otx2_tc_flow_stats *stats;
+ struct otx2_tc_flow *flow_node;
+ int err;
+
+ flow_node = rhashtable_lookup_fast(&tc_info->flow_table,
+ &tc_flow_cmd->cookie,
+ tc_info->flow_ht_params);
+ if (!flow_node) {
+ netdev_info(nic->netdev, "tc flow not found for cookie %lx",
+ tc_flow_cmd->cookie);
+ return -EINVAL;
+ }
+
+ mutex_lock(&nic->mbox.lock);
+
+ req = otx2_mbox_alloc_msg_npc_mcam_entry_stats(&nic->mbox);
+ if (!req) {
+ mutex_unlock(&nic->mbox.lock);
+ return -ENOMEM;
+ }
+
+ req->entry = flow_node->entry;
+
+ err = otx2_sync_mbox_msg(&nic->mbox);
+ if (err) {
+ netdev_err(nic->netdev, "Failed to get stats for MCAM flow entry %d\n",
+ req->entry);
+ mutex_unlock(&nic->mbox.lock);
+ return -EFAULT;
+ }
+
+ rsp = (struct npc_mcam_get_stats_rsp *)otx2_mbox_get_rsp
+ (&nic->mbox.mbox, 0, &req->hdr);
+ if (IS_ERR(rsp)) {
+ mutex_unlock(&nic->mbox.lock);
+ return PTR_ERR(rsp);
+ }
+
+ mutex_unlock(&nic->mbox.lock);
+
+ if (!rsp->stat_ena)
+ return -EINVAL;
+
+ stats = &flow_node->stats;
+
+ spin_lock(&flow_node->lock);
+ flow_stats_update(&tc_flow_cmd->stats, 0x0, rsp->stat - stats->pkts, 0x0, 0x0,
+ FLOW_ACTION_HW_STATS_IMMEDIATE);
+ stats->pkts = rsp->stat;
+ spin_unlock(&flow_node->lock);
+
+ return 0;
+}
+
static int otx2_setup_tc_cls_flower(struct otx2_nic *nic,
struct flow_cls_offload *cls_flower)
{
@@ -412,7 +480,7 @@ static int otx2_setup_tc_cls_flower(struct otx2_nic *nic,
case FLOW_CLS_DESTROY:
return otx2_tc_del_flow(nic, cls_flower);
case FLOW_CLS_STATS:
- return -EOPNOTSUPP;
+ return otx2_tc_get_flow_stats(nic, cls_flower);
default:
return -EOPNOTSUPP;
}
--
2.16.5
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