[PATCH v1] net/ice: support max burst size configuration

[PATCH v1] net/ice: support max burst size configuration

[Wenjun Wu]

This patch adds support for max burst size configuration for
TX scheduler. This feature can be tuned on by devargs:
        -a 0000:18:00.0,max_burst_size=x
The value of x should between 64 and 1023*1024.

Signed-off-by: Wenjun Wu <wenjun1.wu@intel.com>
---
 drivers/net/ice/ice_ethdev.c | 36 ++++++++++++++++++++++++++++++++++++
 drivers/net/ice/ice_ethdev.h |  1 +
 2 files changed, 37 insertions(+)

diff --git a/drivers/net/ice/ice_ethdev.c b/drivers/net/ice/ice_ethdev.c
index 13a7a9702a..2ba42840e2 100644
--- a/drivers/net/ice/ice_ethdev.c
+++ b/drivers/net/ice/ice_ethdev.c
@@ -32,6 +32,7 @@
 #define ICE_HW_DEBUG_MASK_ARG     "hw_debug_mask"
 #define ICE_ONE_PPS_OUT_ARG       "pps_out"
 #define ICE_RX_LOW_LATENCY_ARG    "rx_low_latency"
+#define ICE_MAX_BURST_SIZE_ARG    "max_burst_size"
 
 #define ICE_CYCLECOUNTER_MASK  0xffffffffffffffffULL
 
@@ -45,6 +46,7 @@ static const char * const ice_valid_args[] = {
 	ICE_HW_DEBUG_MASK_ARG,
 	ICE_ONE_PPS_OUT_ARG,
 	ICE_RX_LOW_LATENCY_ARG,
+	ICE_MAX_BURST_SIZE_ARG,
 	NULL
 };
 
@@ -1943,6 +1945,25 @@ handle_pps_out_arg(__rte_unused const char *key, const char *value,
 	return 0;
 }
 
+static int
+parse_u16(const char *key, const char *value, void *args)
+{
+	u16 *num = (u16 *)args;
+	u16 tmp;
+
+	errno = 0;
+	tmp = strtoull(value, NULL, 10);
+	if (errno) {
+		PMD_DRV_LOG(WARNING, "%s: \"%s\" is not a valid u16",
+			    key, value);
+		return -1;
+	}
+
+	*num = tmp;
+
+	return 0;
+}
+
 static int ice_parse_devargs(struct rte_eth_dev *dev)
 {
 	struct ice_adapter *ad =
@@ -1991,6 +2012,13 @@ static int ice_parse_devargs(struct rte_eth_dev *dev)
 
 	ret = rte_kvargs_process(kvlist, ICE_RX_LOW_LATENCY_ARG,
 				 &parse_bool, &ad->devargs.rx_low_latency);
+	if (ret)
+		goto bail;
+
+	ret = rte_kvargs_process(kvlist, ICE_MAX_BURST_SIZE_ARG,
+				 &parse_u16, &ad->devargs.max_burst_size);
+	if (ret)
+		goto bail;
 
 bail:
 	rte_kvargs_free(kvlist);
@@ -2199,6 +2227,14 @@ ice_dev_init(struct rte_eth_dev *dev)
 
 	ice_init_controlq_parameter(hw);
 
+	if (ad->devargs.max_burst_size) {
+		ret = ice_cfg_rl_burst_size(hw, ad->devargs.max_burst_size);
+		if (ret) {
+			PMD_INIT_LOG(ERR, "Failed to configure burst size");
+			return -EINVAL;
+		}
+	}
+
 	ret = ice_init_hw(hw);
 	if (ret) {
 		PMD_INIT_LOG(ERR, "Failed to initialize HW");
diff --git a/drivers/net/ice/ice_ethdev.h b/drivers/net/ice/ice_ethdev.h
index 3a5bb9bbc6..005bb25535 100644
--- a/drivers/net/ice/ice_ethdev.h
+++ b/drivers/net/ice/ice_ethdev.h
@@ -490,6 +490,7 @@ struct ice_devargs {
 	uint8_t proto_xtr[ICE_MAX_QUEUE_NUM];
 	uint8_t pin_idx;
 	uint8_t pps_out_ena;
+	uint16_t max_burst_size;
 };
 
 /**
-- 
2.25.1