diff mbox series

[v2,2/2] common/cnxk: update meter algorithm in band profile

Message ID 20220113122047.1570230-2-rkudurumalla@marvell.com (mailing list archive)
State New
Delegated to: Jerin Jacob
Headers show
Series [v2,1/2] net/cnxk: update meter bpf ID in Recevie Queue | expand

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Commit Message

Rakesh Kudurumalla Jan. 13, 2022, 12:20 p.m. UTC
Patch updates meter algorithm in nix band profile
structure

Signed-off-by: Rakesh Kudurumalla <rkudurumalla@marvell.com>
Acked-by: Sunil Kumar Kori <skori@mavell.com>
---
v2: series patch of 1/2
 drivers/common/cnxk/hw/nix.h      |  5 ---
 drivers/common/cnxk/roc_nix_bpf.c | 61 +++++++++----------------------
 2 files changed, 17 insertions(+), 49 deletions(-)
diff mbox series

Patch

diff --git a/drivers/common/cnxk/hw/nix.h b/drivers/common/cnxk/hw/nix.h
index dd2ebecc6a..6931f1d1d2 100644
--- a/drivers/common/cnxk/hw/nix.h
+++ b/drivers/common/cnxk/hw/nix.h
@@ -2133,11 +2133,6 @@  struct nix_lso_format {
 	((NIX_BPF_RATE_CONST * ((256 + (mantissa)) << (exponent))) /           \
 	 (((1ull << (div_exp)) * 256 * policer_timeunit)))
 
-/* Meter rate limits in Bits/Sec */
-#define NIX_BPF_RATE_MIN NIX_BPF_RATE(1000000000, 0, 0, 0)
-#define NIX_BPF_RATE_MAX                                                       \
-	NIX_BPF_RATE(1, NIX_BPF_MAX_RATE_EXPONENT, NIX_BPF_MAX_RATE_MANTISSA, 0)
-
 #define NIX_BPF_DEFAULT_ADJUST_MANTISSA 511
 #define NIX_BPF_DEFAULT_ADJUST_EXPONENT 0
 
diff --git a/drivers/common/cnxk/roc_nix_bpf.c b/drivers/common/cnxk/roc_nix_bpf.c
index 6996a54be0..46ed91e87b 100644
--- a/drivers/common/cnxk/roc_nix_bpf.c
+++ b/drivers/common/cnxk/roc_nix_bpf.c
@@ -38,48 +38,23 @@  meter_rate_to_nix(uint64_t value, uint64_t *exponent_p, uint64_t *mantissa_p,
 		  uint64_t *div_exp_p, uint32_t timeunit_p)
 {
 	uint64_t div_exp, exponent, mantissa;
-	uint32_t time_us = timeunit_p;
+	uint32_t time_ns = timeunit_p;
 
 	/* Boundary checks */
-	if (value < NIX_BPF_RATE_MIN || value > NIX_BPF_RATE_MAX)
+	if (value < NIX_BPF_RATE(time_ns, 0, 0, 0) ||
+	    value > NIX_BPF_RATE(time_ns, NIX_BPF_MAX_RATE_EXPONENT,
+				 NIX_BPF_MAX_RATE_MANTISSA, 0))
 		return 0;
 
-	if (value <= NIX_BPF_RATE(time_us, 0, 0, 0)) {
-		/* Calculate rate div_exp and mantissa using
-		 * the following formula:
-		 *
-		 * value = (2E6 * (256 + mantissa)
-		 *              / ((1 << div_exp) * 256))
-		 */
-		div_exp = 0;
-		exponent = 0;
-		mantissa = NIX_BPF_MAX_RATE_MANTISSA;
-
-		while (value < (NIX_BPF_RATE_CONST / (1 << div_exp)))
-			div_exp += 1;
-
-		while (value < ((NIX_BPF_RATE_CONST * (256 + mantissa)) /
-				((1 << div_exp) * 256)))
-			mantissa -= 1;
-	} else {
-		/* Calculate rate exponent and mantissa using
-		 * the following formula:
-		 *
-		 * value = (2E6 * ((256 + mantissa) << exponent)) / 256
-		 *
-		 */
-		div_exp = 0;
-		exponent = NIX_BPF_MAX_RATE_EXPONENT;
-		mantissa = NIX_BPF_MAX_RATE_MANTISSA;
-
-		while (value < (NIX_BPF_RATE_CONST * (1 << exponent)))
-			exponent -= 1;
-
-		while (value <
-		       ((NIX_BPF_RATE_CONST * ((256 + mantissa) << exponent)) /
-			256))
-			mantissa -= 1;
-	}
+	div_exp = 0;
+	exponent = NIX_BPF_MAX_RATE_EXPONENT;
+	mantissa = NIX_BPF_MAX_RATE_MANTISSA;
+
+	while (value < (NIX_BPF_RATE(time_ns, exponent, 0, 0)))
+		exponent -= 1;
+
+	while (value < (NIX_BPF_RATE(time_ns, exponent, mantissa, 0)))
+		mantissa -= 1;
 
 	if (div_exp > NIX_BPF_MAX_RATE_DIV_EXP ||
 	    exponent > NIX_BPF_MAX_RATE_EXPONENT ||
@@ -94,7 +69,7 @@  meter_rate_to_nix(uint64_t value, uint64_t *exponent_p, uint64_t *mantissa_p,
 		*mantissa_p = mantissa;
 
 	/* Calculate real rate value */
-	return NIX_BPF_RATE(time_us, exponent, mantissa, div_exp);
+	return NIX_BPF_RATE(time_ns, exponent, mantissa, div_exp);
 }
 
 static inline uint64_t
@@ -195,11 +170,7 @@  nix_precolor_conv_table_write(struct roc_nix *roc_nix, uint64_t val,
 	int64_t *addr;
 
 	addr = PLT_PTR_ADD(nix->base, off);
-	/* FIXME: Currently writing to this register throwing kernel dump.
-	 * plt_write64(val, addr);
-	 */
-	PLT_SET_USED(val);
-	PLT_SET_USED(addr);
+	plt_write64(val, addr);
 }
 
 static uint8_t
@@ -665,6 +636,7 @@  roc_nix_bpf_config(struct roc_nix *roc_nix, uint16_t id,
 
 	aq->prof.lmode = cfg->lmode;
 	aq->prof.icolor = cfg->icolor;
+	aq->prof.meter_algo = cfg->alg;
 	aq->prof.pc_mode = cfg->pc_mode;
 	aq->prof.tnl_ena = cfg->tnl_ena;
 	aq->prof.gc_action = cfg->action[ROC_NIX_BPF_COLOR_GREEN];
@@ -673,6 +645,7 @@  roc_nix_bpf_config(struct roc_nix *roc_nix, uint16_t id,
 
 	aq->prof_mask.lmode = ~(aq->prof_mask.lmode);
 	aq->prof_mask.icolor = ~(aq->prof_mask.icolor);
+	aq->prof_mask.meter_algo = ~(aq->prof_mask.meter_algo);
 	aq->prof_mask.pc_mode = ~(aq->prof_mask.pc_mode);
 	aq->prof_mask.tnl_ena = ~(aq->prof_mask.tnl_ena);
 	aq->prof_mask.gc_action = ~(aq->prof_mask.gc_action);