net/octeontx2: update red algo for shaper dynamic update

Due to an errata red algo needs to be set to discard instead of stall
for 96XX C0 silicon for two rate shaping. This workaround is being
already handled for newly created hierarchy but not for dynamic
shaper update cases. This patch hence applies the workaround
even when for shaper dynamic update.

Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>

diff --git a/drivers/net/octeontx2/otx2_tm.c b/drivers/net/octeontx2/otx2_tm.c
index f94618d77fb2746ac81189897d4d8c398666ea05..b57e10f74e06956f1bb84b934d693854faec70e8 100644 (file)
--- a/drivers/net/octeontx2/otx2_tm.c
+++ b/drivers/net/octeontx2/otx2_tm.c
@@ -237,6 +237,30 @@ shaper_config_to_nix(struct otx2_nix_tm_shaper_profile *profile,
                                                 &pir->burst_mantissa);
 }
 
+static void
+shaper_default_red_algo(struct otx2_eth_dev *dev,
+                       struct otx2_nix_tm_node *tm_node,
+                       struct otx2_nix_tm_shaper_profile *profile)
+{
+       struct shaper_params cir, pir;
+
+       /* C0 doesn't support STALL when both PIR & CIR are enabled */
+       if (profile && otx2_dev_is_96xx_Cx(dev)) {
+               memset(&cir, 0, sizeof(cir));
+               memset(&pir, 0, sizeof(pir));
+               shaper_config_to_nix(profile, &cir, &pir);
+
+               if (pir.rate && cir.rate) {
+                       tm_node->red_algo = NIX_REDALG_DISCARD;
+                       tm_node->flags |= NIX_TM_NODE_RED_DISCARD;
+                       return;
+               }
+       }
+
+       tm_node->red_algo = NIX_REDALG_STD;
+       tm_node->flags &= ~NIX_TM_NODE_RED_DISCARD;
+}
+
 static int
 populate_tm_tl1_default(struct otx2_eth_dev *dev, uint32_t schq)
 {
@@ -744,7 +768,6 @@ nix_tm_node_add_to_list(struct otx2_eth_dev *dev, uint32_t node_id,
 {
        struct otx2_nix_tm_shaper_profile *profile;
        struct otx2_nix_tm_node *tm_node, *parent_node;
-       struct shaper_params cir, pir;
        uint32_t profile_id;
 
        profile_id = params->shaper_profile_id;
@@ -778,19 +801,9 @@ nix_tm_node_add_to_list(struct otx2_eth_dev *dev, uint32_t node_id,
        if (profile)
                profile->reference_count++;
 
-       memset(&cir, 0, sizeof(cir));
-       memset(&pir, 0, sizeof(pir));
-       shaper_config_to_nix(profile, &cir, &pir);
-
        tm_node->parent = parent_node;
        tm_node->parent_hw_id = UINT32_MAX;
-       /* C0 doesn't support STALL when both PIR & CIR are enabled */
-       if (lvl < OTX2_TM_LVL_QUEUE &&
-           otx2_dev_is_96xx_Cx(dev) &&
-           pir.rate && cir.rate)
-               tm_node->red_algo = NIX_REDALG_DISCARD;
-       else
-               tm_node->red_algo = NIX_REDALG_STD;
+       shaper_default_red_algo(dev, tm_node, profile);
 
        TAILQ_INSERT_TAIL(&dev->node_list, tm_node, node);
 
@@ -2500,6 +2513,8 @@ otx2_nix_tm_node_shaper_update(struct rte_eth_dev *eth_dev,
        if (rc)
                return rc;
 
+       shaper_default_red_algo(dev, tm_node, profile);
+
        /* Update the PIR/CIR and clear SW XOFF */
        req = otx2_mbox_alloc_msg_nix_txschq_cfg(mbox);
        req->lvl = tm_node->hw_lvl;

diff --git a/drivers/net/octeontx2/otx2_tm.h b/drivers/net/octeontx2/otx2_tm.h
index 9675182a6238e50f04495134599fe5d889280dd6..4a80c234e5960dc370373d656b0b156afafc1f0d 100644 (file)
--- a/drivers/net/octeontx2/otx2_tm.h
+++ b/drivers/net/octeontx2/otx2_tm.h
@@ -46,6 +46,7 @@ struct otx2_nix_tm_node {
 #define NIX_TM_NODE_HWRES      BIT_ULL(0)
 #define NIX_TM_NODE_ENABLED    BIT_ULL(1)
 #define NIX_TM_NODE_USER       BIT_ULL(2)
+#define NIX_TM_NODE_RED_DISCARD BIT_ULL(3)
        /* Shaper algorithm for RED state @NIX_REDALG_E */
        uint32_t red_algo:2;