[PATCH v3 3/4] net/iavf: support quanta size configuration

[Wenjun Wu <wenjun1.wu@intel.com>]

This patch adds quanta size configuration support.
Quanta size should between 256 and 4096, and be a product of 64.

Signed-off-by: Wenjun Wu <wenjun1.wu@intel.com>
---
 drivers/net/iavf/iavf.h        |  3 +++
 drivers/net/iavf/iavf_ethdev.c | 40 ++++++++++++++++++++++++++++++++++
 drivers/net/iavf/iavf_vchnl.c  | 28 ++++++++++++++++++++++++
 3 files changed, 71 insertions(+)

diff --git a/drivers/net/iavf/iavf.h b/drivers/net/iavf/iavf.h
index 96515a3ee9..c0a4a47b04 100644
--- a/drivers/net/iavf/iavf.h
+++ b/drivers/net/iavf/iavf.h
@@ -292,6 +292,7 @@ enum iavf_proto_xtr_type {
 struct iavf_devargs {
 	uint8_t proto_xtr_dflt;
 	uint8_t proto_xtr[IAVF_MAX_QUEUE_NUM];
+	uint16_t quanta_size;
 };
 
 struct iavf_security_ctx;
@@ -467,6 +468,8 @@ int iavf_set_q_bw(struct rte_eth_dev *dev,
 int iavf_set_q_tc_map(struct rte_eth_dev *dev,
 			struct virtchnl_queue_tc_mapping *q_tc_mapping,
 			uint16_t size);
+int iavf_set_vf_quanta_size(struct iavf_adapter *adapter, u16 start_queue_id,
+			    u16 num_queues);
 void iavf_tm_conf_init(struct rte_eth_dev *dev);
 void iavf_tm_conf_uninit(struct rte_eth_dev *dev);
 int iavf_ipsec_crypto_request(struct iavf_adapter *adapter,
diff --git a/drivers/net/iavf/iavf_ethdev.c b/drivers/net/iavf/iavf_ethdev.c
index d6190ac24a..255459f162 100644
--- a/drivers/net/iavf/iavf_ethdev.c
+++ b/drivers/net/iavf/iavf_ethdev.c
@@ -34,9 +34,11 @@
 
 /* devargs */
 #define IAVF_PROTO_XTR_ARG         "proto_xtr"
+#define IAVF_QUANTA_SIZE_ARG       "quanta_size"
 
 static const char * const iavf_valid_args[] = {
 	IAVF_PROTO_XTR_ARG,
+	IAVF_QUANTA_SIZE_ARG,
 	NULL
 };
 
@@ -950,6 +952,11 @@ iavf_dev_start(struct rte_eth_dev *dev)
 		return -1;
 	}
 
+	if (iavf_set_vf_quanta_size(adapter, index, num_queue_pairs) != 0) {
+		PMD_DRV_LOG(ERR, "configure quanta size failed");
+		goto err_queue;
+	}
+
 	/* If needed, send configure queues msg multiple times to make the
 	 * adminq buffer length smaller than the 4K limitation.
 	 */
@@ -2092,6 +2099,25 @@ iavf_handle_proto_xtr_arg(__rte_unused const char *key, const char *value,
 	return 0;
 }
 
+static int
+parse_u16(__rte_unused const char *key, const char *value, void *args)
+{
+	u16 *num = (u16 *)args;
+	u16 tmp;
+
+	errno = 0;
+	tmp = strtoull(value, NULL, 10);
+	if (errno || !tmp) {
+		PMD_DRV_LOG(WARNING, "%s: \"%s\" is not a valid u16",
+			    key, value);
+		return -1;
+	}
+
+	*num = tmp;
+
+	return 0;
+}
+
 static int iavf_parse_devargs(struct rte_eth_dev *dev)
 {
 	struct iavf_adapter *ad =
@@ -2118,6 +2144,20 @@ static int iavf_parse_devargs(struct rte_eth_dev *dev)
 	if (ret)
 		goto bail;
 
+	ret = rte_kvargs_process(kvlist, IAVF_QUANTA_SIZE_ARG,
+				 &parse_u16, &ad->devargs.quanta_size);
+	if (ret)
+		goto bail;
+
+	if (ad->devargs.quanta_size == 0)
+		ad->devargs.quanta_size = 1024;
+
+	if (ad->devargs.quanta_size < 256 || ad->devargs.quanta_size > 4096 ||
+	    ad->devargs.quanta_size & 0x40) {
+		PMD_INIT_LOG(ERR, "invalid quanta size\n");
+		return -EINVAL;
+	}
+
 bail:
 	rte_kvargs_free(kvlist);
 	return ret;
diff --git a/drivers/net/iavf/iavf_vchnl.c b/drivers/net/iavf/iavf_vchnl.c
index 537369f736..ee26e45acf 100644
--- a/drivers/net/iavf/iavf_vchnl.c
+++ b/drivers/net/iavf/iavf_vchnl.c
@@ -1828,3 +1828,31 @@ iavf_ipsec_crypto_request(struct iavf_adapter *adapter,
 
 	return 0;
 }
+
+int
+iavf_set_vf_quanta_size(struct iavf_adapter *adapter, u16 start_queue_id, u16 num_queues)
+{
+	struct iavf_info *vf = IAVF_DEV_PRIVATE_TO_VF(adapter);
+	struct iavf_cmd_info args;
+	struct virtchnl_quanta_cfg q_quanta;
+	int err;
+
+	q_quanta.quanta_size = adapter->devargs.quanta_size;
+	q_quanta.queue_select.type = VIRTCHNL_QUEUE_TYPE_TX;
+	q_quanta.queue_select.start_queue_id = start_queue_id;
+	q_quanta.queue_select.num_queues = num_queues;
+
+	args.ops = VIRTCHNL_OP_CONFIG_QUANTA;
+	args.in_args = (uint8_t *)&q_quanta;
+	args.in_args_size = sizeof(q_quanta);
+	args.out_buffer = vf->aq_resp;
+	args.out_size = IAVF_AQ_BUF_SZ;
+
+	err = iavf_execute_vf_cmd(adapter, &args, 0);
+	if (err) {
+		PMD_DRV_LOG(ERR, "Failed to execute command of VIRTCHNL_OP_CONFIG_QUANTA");
+		return err;
+	}
+
+	return 0;
+}
-- 
2.25.1