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net: thunderx: Reset RXQ HW stats when interface is brought down 

When SQ/TXQ is reclaimed i.e reset it's stats also automatically reset
by HW. This is not the case with RQ. Also VF doesn't have write access
to statistics counter registers. Hence a new Mbox msg is introduced which
supports resetting RQ, SQ and full Qset stats. Currently only RQ stats
are being reset using this mbox message.

Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Signed-off-by: Sunil Goutham <sgoutham@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jerin Jacob 2016-08-12 16:51:39 +05:30 committed by David S. Miller
parent ecae29cb15
commit 3458c40d60
3 changed files with 87 additions and 0 deletions
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27
drivers/net/ethernet/cavium/thunder/nic.h
View File

@ -347,6 +347,7 @@ struct nicvf {
#define NIC_MBOX_MSG_PNICVF_PTR 0x14 /* Get primary qset nicvf ptr */
#define NIC_MBOX_MSG_SNICVF_PTR 0x15 /* Send sqet nicvf ptr to PVF */
#define NIC_MBOX_MSG_LOOPBACK 0x16 /* Set interface in loopback */
#define NIC_MBOX_MSG_RESET_STAT_COUNTER 0x17 /* Reset statistics counters */
#define NIC_MBOX_MSG_CFG_DONE 0xF0 /* VF configuration done */
#define NIC_MBOX_MSG_SHUTDOWN 0xF1 /* VF is being shutdown */
@ -463,6 +464,31 @@ struct set_loopback {
bool enable;
};
/* Reset statistics counters */
struct reset_stat_cfg {
u8 msg;
/* Bitmap to select NIC_PF_VNIC(vf_id)_RX_STAT(0..13) */
u16 rx_stat_mask;
/* Bitmap to select NIC_PF_VNIC(vf_id)_TX_STAT(0..4) */
u8 tx_stat_mask;
/* Bitmap to select NIC_PF_QS(0..127)_RQ(0..7)_STAT(0..1)
* bit14, bit15 NIC_PF_QS(vf_id)_RQ7_STAT(0..1)
* bit12, bit13 NIC_PF_QS(vf_id)_RQ6_STAT(0..1)
* ..
* bit2, bit3 NIC_PF_QS(vf_id)_RQ1_STAT(0..1)
* bit0, bit1 NIC_PF_QS(vf_id)_RQ0_STAT(0..1)
*/
u16 rq_stat_mask;
/* Bitmap to select NIC_PF_QS(0..127)_SQ(0..7)_STAT(0..1)
* bit14, bit15 NIC_PF_QS(vf_id)_SQ7_STAT(0..1)
* bit12, bit13 NIC_PF_QS(vf_id)_SQ6_STAT(0..1)
* ..
* bit2, bit3 NIC_PF_QS(vf_id)_SQ1_STAT(0..1)
* bit0, bit1 NIC_PF_QS(vf_id)_SQ0_STAT(0..1)
*/
u16 sq_stat_mask;
};
/* 128 bit shared memory between PF and each VF */
union nic_mbx {
struct { u8 msg; } msg;
@ -480,6 +506,7 @@ union nic_mbx {
struct sqs_alloc sqs_alloc;
struct nicvf_ptr nicvf;
struct set_loopback lbk;
struct reset_stat_cfg reset_stat;
};
#define NIC_NODE_ID_MASK 0x03

45
drivers/net/ethernet/cavium/thunder/nic_main.c
View File

@ -793,6 +793,48 @@ static int nic_config_loopback(struct nicpf *nic, struct set_loopback *lbk)
return 0;
}
/* Reset statistics counters */
static int nic_reset_stat_counters(struct nicpf *nic,
int vf, struct reset_stat_cfg *cfg)
{
int i, stat, qnum;
u64 reg_addr;
for (i = 0; i < RX_STATS_ENUM_LAST; i++) {
if (cfg->rx_stat_mask & BIT(i)) {
reg_addr = NIC_PF_VNIC_0_127_RX_STAT_0_13 |
(vf << NIC_QS_ID_SHIFT) |
(i << 3);
nic_reg_write(nic, reg_addr, 0);
}
}
for (i = 0; i < TX_STATS_ENUM_LAST; i++) {
if (cfg->tx_stat_mask & BIT(i)) {
reg_addr = NIC_PF_VNIC_0_127_TX_STAT_0_4 |
(vf << NIC_QS_ID_SHIFT) |
(i << 3);
nic_reg_write(nic, reg_addr, 0);
}
}
for (i = 0; i <= 15; i++) {
qnum = i >> 1;
stat = i & 1 ? 1 : 0;
reg_addr = (vf << NIC_QS_ID_SHIFT) |
(qnum << NIC_Q_NUM_SHIFT) | (stat << 3);
if (cfg->rq_stat_mask & BIT(i)) {
reg_addr |= NIC_PF_QSET_0_127_RQ_0_7_STAT_0_1;
nic_reg_write(nic, reg_addr, 0);
}
if (cfg->sq_stat_mask & BIT(i)) {
reg_addr |= NIC_PF_QSET_0_127_SQ_0_7_STAT_0_1;
nic_reg_write(nic, reg_addr, 0);
}
}
return 0;
}
static void nic_enable_vf(struct nicpf *nic, int vf, bool enable)
{
int bgx, lmac;
@ -942,6 +984,9 @@ static void nic_handle_mbx_intr(struct nicpf *nic, int vf)
case NIC_MBOX_MSG_LOOPBACK:
ret = nic_config_loopback(nic, &mbx.lbk);
break;
case NIC_MBOX_MSG_RESET_STAT_COUNTER:
ret = nic_reset_stat_counters(nic, vf, &mbx.reset_stat);
break;
default:
dev_err(&nic->pdev->dev,
"Invalid msg from VF%d, msg 0x%x\n", vf, mbx.msg.msg);

15
drivers/net/ethernet/cavium/thunder/nicvf_queues.c
View File

@ -479,6 +479,16 @@ void nicvf_config_vlan_stripping(struct nicvf *nic, netdev_features_t features)
NIC_QSET_RQ_GEN_CFG, 0, rq_cfg);
}
static void nicvf_reset_rcv_queue_stats(struct nicvf *nic)
{
union nic_mbx mbx = {};
/* Reset all RXQ's stats */
mbx.reset_stat.msg = NIC_MBOX_MSG_RESET_STAT_COUNTER;
mbx.reset_stat.rq_stat_mask = 0xFFFF;
nicvf_send_msg_to_pf(nic, &mbx);
}
/* Configures receive queue */
static void nicvf_rcv_queue_config(struct nicvf *nic, struct queue_set *qs,
int qidx, bool enable)
@ -812,6 +822,11 @@ int nicvf_config_data_transfer(struct nicvf *nic, bool enable)
nicvf_free_resources(nic);
}
/* Reset RXQ's stats.
* SQ's stats will get reset automatically once SQ is reset.
*/
nicvf_reset_rcv_queue_stats(nic);
return 0;
}