[PATCH net-next 8/9] cxgb4: Update SGE context congestion map change for T6 adapter

[Hariprasad Shenai]

SGE context congestion map changed from 4 to 8 priority per port
in T6 as there are only 2 channels.

Signed-off-by: Hariprasad Shenai <haripra...@chelsio.com>
---
 drivers/net/ethernet/chelsio/cxgb4/cxgb4.h | 1 +
 drivers/net/ethernet/chelsio/cxgb4/sge.c   | 7 ++++---
 drivers/net/ethernet/chelsio/cxgb4/t4_hw.c | 9 +++++++++
 3 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h 
b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
index 5c193a5..ec6e849 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
@@ -302,6 +302,7 @@ struct devlog_params {
 struct arch_specific_params {
        u8 nchan;
        u8 pm_stats_cnt;
+       u8 cng_ch_bits_log;             /* congestion channel map bits width */
        u16 mps_rplc_size;
        u16 vfcount;
        u32 sge_fl_db;
diff --git a/drivers/net/ethernet/chelsio/cxgb4/sge.c 
b/drivers/net/ethernet/chelsio/cxgb4/sge.c
index 5829c9c..b4eb468 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/sge.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/sge.c
@@ -2670,8 +2670,9 @@ int t4_sge_alloc_rxq(struct adapter *adap, struct 
sge_rspq *iq, bool fwevtq,
         * simple (and hopefully less wrong).
         */
        if (!is_t4(adap->params.chip) && cong >= 0) {
-               u32 param, val;
+               u32 param, val, ch_map = 0;
                int i;
+               u16 cng_ch_bits_log = adap->params.arch.cng_ch_bits_log;
 
                param = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DMAQ) |
                         FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DMAQ_CONM_CTXT) |
@@ -2683,9 +2684,9 @@ int t4_sge_alloc_rxq(struct adapter *adap, struct 
sge_rspq *iq, bool fwevtq,
                            CONMCTXT_CNGTPMODE_V(CONMCTXT_CNGTPMODE_CHANNEL_X);
                        for (i = 0; i < 4; i++) {
                                if (cong & (1 << i))
-                                       val |=
-                                            CONMCTXT_CNGCHMAP_V(1 << (i << 2));
+                                       ch_map |= 1 << (i << cng_ch_bits_log);
                        }
+                       val |= CONMCTXT_CNGCHMAP_V(ch_map);
                }
                ret = t4_set_params(adap, adap->mbox, adap->pf, 0, 1,
                                    &param, &val);
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c 
b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
index 0132b64..636b469 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
@@ -7194,6 +7194,10 @@ int t4_prep_adapter(struct adapter *adapter)
                adapter->params.arch.nchan = NCHAN;
                adapter->params.arch.pm_stats_cnt = PM_NSTATS;
                adapter->params.arch.vfcount = 128;
+               /* Congestion map is for 4 channels so that
+                * MPS can have 4 priority per port.
+                */
+               adapter->params.arch.cng_ch_bits_log = 2;
                break;
        case CHELSIO_T5:
                adapter->params.chip |= CHELSIO_CHIP_CODE(CHELSIO_T5, pl_rev);
@@ -7204,6 +7208,7 @@ int t4_prep_adapter(struct adapter *adapter)
                adapter->params.arch.nchan = NCHAN;
                adapter->params.arch.pm_stats_cnt = PM_NSTATS;
                adapter->params.arch.vfcount = 128;
+               adapter->params.arch.cng_ch_bits_log = 2;
                break;
        case CHELSIO_T6:
                adapter->params.chip |= CHELSIO_CHIP_CODE(CHELSIO_T6, pl_rev);
@@ -7214,6 +7219,10 @@ int t4_prep_adapter(struct adapter *adapter)
                adapter->params.arch.nchan = 2;
                adapter->params.arch.pm_stats_cnt = T6_PM_NSTATS;
                adapter->params.arch.vfcount = 256;
+               /* Congestion map will be for 2 channels so that
+                * MPS can have 8 priority per port.
+                */
+               adapter->params.arch.cng_ch_bits_log = 3;
                break;
        default:
                dev_err(adapter->pdev_dev, "Device %d is not supported\n",
-- 
2.3.4

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