[net PATCH V4 2/3] octeontx2-af: CN10KB: fix PFC configuration

Suman Ghosh
2023-08-24T08:13:56Z

From: Hariprasad Kelam <hkelam@marvell.com>

Suppose user has enabled pfc with prio 0,1 on a PF netdev(eth0)
dcb pfc set dev eth0 prio-pfc o:on 1:on
later user enabled pfc priorities 2 and 3 on the VF interface(eth1)
dcb pfc set dev eth1 prio-pfc 2:on 3:on

Instead of enabling pfc on all priorities (0..3), the driver only
enables on priorities 2,3. This patch corrects the issue by using
the proper CSR address.

Fixes: b9d0fedc6234 ("octeontx2-af: cn10kb: Add RPM_USX MAC support")
Signed-off-by: Hariprasad Kelam <hkelam@marvell.com>
---
drivers/net/ethernet/marvell/octeontx2/af/rpm.c | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rpm.c b/drivers/net/ethernet/marvell/octeontx2/af/rpm.c
index b4fcb20c3f4f..af21e2030cff 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rpm.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rpm.c
@@ -355,8 +355,8 @@ int rpm_lmac_enadis_pause_frm(void *rpmd, int lmac_id, u8 tx_pause,

void rpm_lmac_pause_frm_config(void *rpmd, int lmac_id, bool enable)
{
+ u64 cfg, pfc_class_mask_cfg;
rpm_t *rpm = rpmd;
- u64 cfg;

/* ALL pause frames received are completely ignored */
cfg = rpm_read(rpm, lmac_id, RPMX_MTI_MAC100X_COMMAND_CONFIG);
@@ -380,9 +380,11 @@ void rpm_lmac_pause_frm_config(void *rpmd, int lmac_id, bool enable)
rpm_write(rpm, 0, RPMX_CMR_CHAN_MSK_OR, ~0ULL);

/* Disable all PFC classes */
- cfg = rpm_read(rpm, lmac_id, RPMX_CMRX_PRT_CBFC_CTL);
+ pfc_class_mask_cfg = is_dev_rpm2(rpm) ? RPM2_CMRX_PRT_CBFC_CTL :
+ RPMX_CMRX_PRT_CBFC_CTL;
+ cfg = rpm_read(rpm, lmac_id, pfc_class_mask_cfg);
cfg = FIELD_SET(RPM_PFC_CLASS_MASK, 0, cfg);
- rpm_write(rpm, lmac_id, RPMX_CMRX_PRT_CBFC_CTL, cfg);
+ rpm_write(rpm, lmac_id, pfc_class_mask_cfg, cfg);
}

int rpm_get_rx_stats(void *rpmd, int lmac_id, int idx, u64 *rx_stat)
@@ -605,8 +607,11 @@ int rpm_lmac_pfc_config(void *rpmd, int lmac_id, u8 tx_pause, u8 rx_pause, u16 p
if (!is_lmac_valid(rpm, lmac_id))
return -ENODEV;

+ pfc_class_mask_cfg = is_dev_rpm2(rpm) ? RPM2_CMRX_PRT_CBFC_CTL :
+ RPMX_CMRX_PRT_CBFC_CTL;
+
cfg = rpm_read(rpm, lmac_id, RPMX_MTI_MAC100X_COMMAND_CONFIG);
- class_en = rpm_read(rpm, lmac_id, RPMX_CMRX_PRT_CBFC_CTL);
+ class_en = rpm_read(rpm, lmac_id, pfc_class_mask_cfg);
pfc_en |= FIELD_GET(RPM_PFC_CLASS_MASK, class_en);

if (rx_pause) {
@@ -635,10 +640,6 @@ int rpm_lmac_pfc_config(void *rpmd, int lmac_id, u8 tx_pause, u8 rx_pause, u16 p
cfg |= RPMX_MTI_MAC100X_COMMAND_CONFIG_PFC_MODE;

rpm_write(rpm, lmac_id, RPMX_MTI_MAC100X_COMMAND_CONFIG, cfg);
-
- pfc_class_mask_cfg = is_dev_rpm2(rpm) ? RPM2_CMRX_PRT_CBFC_CTL :
- RPMX_CMRX_PRT_CBFC_CTL;
-
rpm_write(rpm, lmac_id, pfc_class_mask_cfg, class_en);

return 0;
--
2.25.1