From: Satha Rao <skoteshwar@marvell.com>
Date: Wed, 22 Sep 2021 06:11:44 +0000 (-0400)
Subject: common/cnxk: handle packet mode shaper limits
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=680078faf32095b845f59b4e19461d28d2165059;p=dpdk.git

common/cnxk: handle packet mode shaper limits

Add new macros to reflect HW shaper PPS limits. New API to validate
input rates for packet mode. Increase adjust value to support lesser
PPS (<61).

Signed-off-by: Satha Rao <skoteshwar@marvell.com>
Acked-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
---

diff --git a/drivers/common/cnxk/hw/nix.h b/drivers/common/cnxk/hw/nix.h
index d2054385c2..6a0eb019ac 100644
--- a/drivers/common/cnxk/hw/nix.h
+++ b/drivers/common/cnxk/hw/nix.h
@@ -2133,6 +2133,9 @@ struct nix_lso_format {
 	NIX_TM_SHAPER_RATE(NIX_TM_MAX_RATE_EXPONENT, NIX_TM_MAX_RATE_MANTISSA, \
 			   0)
 
+#define NIX_TM_MIN_SHAPER_PPS_RATE 25
+#define NIX_TM_MAX_SHAPER_PPS_RATE (100ul << 20)
+
 /* NIX burst limits */
 #define NIX_TM_MAX_BURST_EXPONENT      0xful
 #define NIX_TM_MAX_BURST_MANTISSA      0x7ffful
diff --git a/drivers/common/cnxk/roc_nix_priv.h b/drivers/common/cnxk/roc_nix_priv.h
index cc8e822427..3412bf25e5 100644
--- a/drivers/common/cnxk/roc_nix_priv.h
+++ b/drivers/common/cnxk/roc_nix_priv.h
@@ -90,6 +90,7 @@ struct nix_tm_shaper_profile {
 	struct nix_tm_tb commit;
 	struct nix_tm_tb peak;
 	int32_t pkt_len_adj;
+	int32_t pkt_mode_adj;
 	bool pkt_mode;
 	uint32_t id;
 	void (*free_fn)(void *profile);
diff --git a/drivers/common/cnxk/roc_nix_tm_ops.c b/drivers/common/cnxk/roc_nix_tm_ops.c
index 24a5a911aa..f956f8d8ed 100644
--- a/drivers/common/cnxk/roc_nix_tm_ops.c
+++ b/drivers/common/cnxk/roc_nix_tm_ops.c
@@ -84,6 +84,51 @@ roc_nix_tm_free_resources(struct roc_nix *roc_nix, bool hw_only)
 	return nix_tm_free_resources(roc_nix, BIT(ROC_NIX_TM_USER), hw_only);
 }
 
+static int
+nix_tm_adjust_shaper_pps_rate(struct nix_tm_shaper_profile *profile)
+{
+	uint64_t min_rate = profile->commit.rate;
+
+	if (!profile->pkt_mode)
+		return 0;
+
+	profile->pkt_mode_adj = 1;
+
+	if (profile->commit.rate &&
+	    (profile->commit.rate < NIX_TM_MIN_SHAPER_PPS_RATE ||
+	     profile->commit.rate > NIX_TM_MAX_SHAPER_PPS_RATE))
+		return NIX_ERR_TM_INVALID_COMMIT_RATE;
+
+	if (profile->peak.rate &&
+	    (profile->peak.rate < NIX_TM_MIN_SHAPER_PPS_RATE ||
+	     profile->peak.rate > NIX_TM_MAX_SHAPER_PPS_RATE))
+		return NIX_ERR_TM_INVALID_PEAK_RATE;
+
+	if (profile->peak.rate && min_rate > profile->peak.rate)
+		min_rate = profile->peak.rate;
+
+	/* Each packet accomulate single count, whereas HW
+	 * considers each unit as Byte, so we need convert
+	 * user pps to bps
+	 */
+	profile->commit.rate = profile->commit.rate * 8;
+	profile->peak.rate = profile->peak.rate * 8;
+	min_rate = min_rate * 8;
+
+	if (min_rate && (min_rate < NIX_TM_MIN_SHAPER_RATE)) {
+		int adjust = NIX_TM_MIN_SHAPER_RATE / min_rate;
+
+		if (adjust > NIX_TM_LENGTH_ADJUST_MAX)
+			return NIX_ERR_TM_SHAPER_PKT_LEN_ADJUST;
+
+		profile->pkt_mode_adj += adjust;
+		profile->commit.rate += (adjust * profile->commit.rate);
+		profile->peak.rate += (adjust * profile->peak.rate);
+	}
+
+	return 0;
+}
+
 static int
 nix_tm_shaper_profile_add(struct roc_nix *roc_nix,
 			  struct nix_tm_shaper_profile *profile, int skip_ins)
@@ -93,8 +138,13 @@ nix_tm_shaper_profile_add(struct roc_nix *roc_nix,
 	uint64_t min_burst, max_burst;
 	uint64_t peak_rate, peak_sz;
 	uint32_t id;
+	int rc;
 
 	id = profile->id;
+	rc = nix_tm_adjust_shaper_pps_rate(profile);
+	if (rc)
+		return rc;
+
 	commit_rate = profile->commit.rate;
 	commit_sz = profile->commit.size;
 	peak_rate = profile->peak.rate;
@@ -164,17 +214,8 @@ roc_nix_tm_shaper_profile_add(struct roc_nix *roc_nix,
 
 	profile->ref_cnt = 0;
 	profile->id = roc_profile->id;
-	if (roc_profile->pkt_mode) {
-		/* Each packet accomulate single count, whereas HW
-		 * considers each unit as Byte, so we need convert
-		 * user pps to bps
-		 */
-		profile->commit.rate = roc_profile->commit_rate * 8;
-		profile->peak.rate = roc_profile->peak_rate * 8;
-	} else {
-		profile->commit.rate = roc_profile->commit_rate;
-		profile->peak.rate = roc_profile->peak_rate;
-	}
+	profile->commit.rate = roc_profile->commit_rate;
+	profile->peak.rate = roc_profile->peak_rate;
 	profile->commit.size = roc_profile->commit_sz;
 	profile->peak.size = roc_profile->peak_sz;
 	profile->pkt_len_adj = roc_profile->pkt_len_adj;
@@ -192,17 +233,8 @@ roc_nix_tm_shaper_profile_update(struct roc_nix *roc_nix,
 
 	profile = (struct nix_tm_shaper_profile *)roc_profile->reserved;
 
-	if (roc_profile->pkt_mode) {
-		/* Each packet accomulate single count, whereas HW
-		 * considers each unit as Byte, so we need convert
-		 * user pps to bps
-		 */
-		profile->commit.rate = roc_profile->commit_rate * 8;
-		profile->peak.rate = roc_profile->peak_rate * 8;
-	} else {
-		profile->commit.rate = roc_profile->commit_rate;
-		profile->peak.rate = roc_profile->peak_rate;
-	}
+	profile->commit.rate = roc_profile->commit_rate;
+	profile->peak.rate = roc_profile->peak_rate;
 	profile->commit.size = roc_profile->commit_sz;
 	profile->peak.size = roc_profile->peak_sz;
 
diff --git a/drivers/common/cnxk/roc_nix_tm_utils.c b/drivers/common/cnxk/roc_nix_tm_utils.c
index 00604b10d3..83306248e8 100644
--- a/drivers/common/cnxk/roc_nix_tm_utils.c
+++ b/drivers/common/cnxk/roc_nix_tm_utils.c
@@ -628,8 +628,8 @@ nix_tm_shaper_reg_prep(struct nix_tm_node *node,
 	memset(&pir, 0, sizeof(pir));
 	nix_tm_shaper_conf_get(profile, &cir, &pir);
 
-	if (node->pkt_mode)
-		adjust = 1;
+	if (profile && node->pkt_mode)
+		adjust = profile->pkt_mode_adj;
 	else if (profile)
 		adjust = profile->pkt_len_adj;