[dpdk-dev] [PATCH v2 6/9] devarg: change reprsentor ID to bitmap

[Xueming Li <xuemingl@nvidia.com>]

In eth representor comparator callback, ethdev was compared with devarg.
Since ethdev representor port didn't contain controller(host) and owner
port information, callback only compared representor port and returned
representor port on other PF port.

This patch changes representor port to bitmap encoding, expands and
updates representor port ID after parsing, when device representor ID
uses the same bitmap encoding, the eth representor comparer callback
returns correct ethdev.

Representor port ID bitmap definition:
 Representor ID bitmap:
 xxxx xxxx xxxx xxxx
 |||| |LLL LLLL LLLL vf/sf id
 |||| L 1:sf, 0:vf
 ||LL pf id
 LL controller(host) id

Signed-off-by: Xueming Li <xuemingl@nvidia.com>
---
 drivers/net/bnxt/bnxt_reps.c             |  3 +-
 drivers/net/enic/enic_vf_representor.c   |  3 +-
 drivers/net/i40e/i40e_vf_representor.c   |  3 +-
 drivers/net/ixgbe/ixgbe_vf_representor.c |  3 +-
 drivers/net/mlx5/linux/mlx5_os.c         |  4 +-
 lib/librte_ethdev/ethdev_private.c       |  5 ++-
 lib/librte_ethdev/rte_class_eth.c        | 38 ++++++++++++++----
 lib/librte_ethdev/rte_ethdev.c           | 26 ++++++++++++
 lib/librte_ethdev/rte_ethdev_driver.h    | 51 ++++++++++++++++++++++++
 lib/librte_ethdev/version.map            |  2 +
 10 files changed, 124 insertions(+), 14 deletions(-)

diff --git a/drivers/net/bnxt/bnxt_reps.c b/drivers/net/bnxt/bnxt_reps.c
index e5ba0909b9..bc3b564d06 100644
--- a/drivers/net/bnxt/bnxt_reps.c
+++ b/drivers/net/bnxt/bnxt_reps.c
@@ -186,7 +186,8 @@ int bnxt_representor_init(struct rte_eth_dev *eth_dev, void *params)
 
 	eth_dev->data->dev_flags |= RTE_ETH_DEV_REPRESENTOR |
 					RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS;
-	eth_dev->data->representor_id = rep_params->vf_id;
+	eth_dev->data->representor_id = rte_eth_representor_id_encode(
+		0, 0, RTE_ETH_REPRESENTOR_VF, rep_params->vf_id);
 
 	rte_eth_random_addr(vf_rep_bp->dflt_mac_addr);
 	memcpy(vf_rep_bp->mac_addr, vf_rep_bp->dflt_mac_addr,
diff --git a/drivers/net/enic/enic_vf_representor.c b/drivers/net/enic/enic_vf_representor.c
index c2c03c0281..632317af15 100644
--- a/drivers/net/enic/enic_vf_representor.c
+++ b/drivers/net/enic/enic_vf_representor.c
@@ -674,7 +674,8 @@ int enic_vf_representor_init(struct rte_eth_dev *eth_dev, void *init_params)
 	eth_dev->dev_ops = &enic_vf_representor_dev_ops;
 	eth_dev->data->dev_flags |= RTE_ETH_DEV_REPRESENTOR |
 					RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS;
-	eth_dev->data->representor_id = vf->vf_id;
+	eth_dev->data->representor_id = rte_eth_representor_id_encode(
+		0, 0, RTE_ETH_REPRESENTOR_VF, vf->vf_id);
 	eth_dev->data->mac_addrs = rte_zmalloc("enic_mac_addr_vf",
 		sizeof(struct rte_ether_addr) *
 		ENIC_UNICAST_PERFECT_FILTERS, 0);
diff --git a/drivers/net/i40e/i40e_vf_representor.c b/drivers/net/i40e/i40e_vf_representor.c
index 9e40406a3d..d90d0fdb9d 100644
--- a/drivers/net/i40e/i40e_vf_representor.c
+++ b/drivers/net/i40e/i40e_vf_representor.c
@@ -510,7 +510,8 @@ i40e_vf_representor_init(struct rte_eth_dev *ethdev, void *init_params)
 
 	ethdev->data->dev_flags |= RTE_ETH_DEV_REPRESENTOR |
 					RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS;
-	ethdev->data->representor_id = representor->vf_id;
+	ethdev->data->representor_id = rte_eth_representor_id_encode(
+			0, 0, RTE_ETH_REPRESENTOR_VF, representor->vf_id);
 
 	/* Setting the number queues allocated to the VF */
 	ethdev->data->nb_rx_queues = vf->vsi->nb_qps;
diff --git a/drivers/net/ixgbe/ixgbe_vf_representor.c b/drivers/net/ixgbe/ixgbe_vf_representor.c
index 8185f0d3bb..e15b794761 100644
--- a/drivers/net/ixgbe/ixgbe_vf_representor.c
+++ b/drivers/net/ixgbe/ixgbe_vf_representor.c
@@ -196,7 +196,8 @@ ixgbe_vf_representor_init(struct rte_eth_dev *ethdev, void *init_params)
 		return -ENODEV;
 
 	ethdev->data->dev_flags |= RTE_ETH_DEV_REPRESENTOR;
-	ethdev->data->representor_id = representor->vf_id;
+	ethdev->data->representor_id = rte_eth_representor_id_encode(
+			0, 0, RTE_ETH_REPRESENTOR_VF, representor->vf_id);
 
 	/* Set representor device ops */
 	ethdev->dev_ops = &ixgbe_vf_representor_dev_ops;
diff --git a/drivers/net/mlx5/linux/mlx5_os.c b/drivers/net/mlx5/linux/mlx5_os.c
index 6981ba1f41..7739a1b0a5 100644
--- a/drivers/net/mlx5/linux/mlx5_os.c
+++ b/drivers/net/mlx5/linux/mlx5_os.c
@@ -1031,7 +1031,9 @@ mlx5_dev_spawn(struct rte_device *dpdk_dev,
 #endif
 	/* representor_id field keeps the unmodified VF index. */
 	priv->representor_id = switch_info->representor ?
-			       switch_info->port_name : -1;
+		rte_eth_representor_id_encode(0, 0, RTE_ETH_REPRESENTOR_VF,
+					      switch_info->port_name) :
+		-1;
 	/*
 	 * Look for sibling devices in order to reuse their switch domain
 	 * if any, otherwise allocate one.
diff --git a/lib/librte_ethdev/ethdev_private.c b/lib/librte_ethdev/ethdev_private.c
index 95f1ab847a..57e84a34af 100644
--- a/lib/librte_ethdev/ethdev_private.c
+++ b/lib/librte_ethdev/ethdev_private.c
@@ -93,10 +93,13 @@ rte_eth_devargs_process_list(char *str, uint16_t *list, uint16_t *len_list,
 }
 
 /*
- * representor format:
+ * Parse representor ports, expand and update representor port ID.
+ * Representor format:
  *   #: range or single number of VF representor - legacy
  *   [[c#]pf#]vf#: VF port representor/s
  *   [[c#]pf#]sf#: SF port representor/s
+ *
+ * See RTE_ETH_REPR() for representor ID format.
  */
 int
 rte_eth_devargs_parse_representor_ports(char *str, void *data)
diff --git a/lib/librte_ethdev/rte_class_eth.c b/lib/librte_ethdev/rte_class_eth.c
index efe6149df5..994db96960 100644
--- a/lib/librte_ethdev/rte_class_eth.c
+++ b/lib/librte_ethdev/rte_class_eth.c
@@ -66,8 +66,8 @@ eth_representor_cmp(const char *key __rte_unused,
 	int ret;
 	char *values;
 	const struct rte_eth_dev_data *data = opaque;
-	struct rte_eth_devargs representors;
-	uint16_t index;
+	struct rte_eth_devargs eth_da;
+	uint16_t index, c, p, f;
 
 	if ((data->dev_flags & RTE_ETH_DEV_REPRESENTOR) == 0)
 		return -1; /* not a representor port */
@@ -76,17 +76,39 @@ eth_representor_cmp(const char *key __rte_unused,
 	values = strdup(value);
 	if (values == NULL)
 		return -1;
-	memset(&representors, 0, sizeof(representors));
-	ret = rte_eth_devargs_parse_representor_ports(values, &representors);
+	memset(&eth_da, 0, sizeof(eth_da));
+	ret = rte_eth_devargs_parse_representor_ports(values, &eth_da);
 	free(values);
 	if (ret != 0)
 		return -1; /* invalid devargs value */
 
+	/* Set default values. */
+	if (eth_da.nb_mh_controllers == 0) {
+		eth_da.nb_mh_controllers = 1;
+		eth_da.mh_controllers[0] = 0;
+	}
+	if (eth_da.nb_ports == 0) {
+		eth_da.nb_ports = 1;
+		eth_da.ports[0] = 0;
+	}
+	if (eth_da.nb_representor_ports == 0) {
+		eth_da.nb_representor_ports = 1;
+		eth_da.representor_ports[0] = 0;
+	}
 	/* Return 0 if representor id is matching one of the values. */
-	for (index = 0; index < representors.nb_representor_ports; index++)
-		if (data->representor_id ==
-				representors.representor_ports[index])
-			return 0;
+	for (c = 0; c < eth_da.nb_mh_controllers; ++c) {
+		for (p = 0; p < eth_da.nb_ports; ++p) {
+			for (f = 0; f < eth_da.nb_representor_ports; ++f) {
+				index = rte_eth_representor_id_encode(
+					eth_da.mh_controllers[c],
+					eth_da.ports[p],
+					eth_da.type,
+					eth_da.representor_ports[f]);
+				if (data->representor_id == index)
+					return 0;
+			}
+		}
+	}
 	return -1; /* no match */
 }
 
diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
index 2ac51ac149..276f42e54b 100644
--- a/lib/librte_ethdev/rte_ethdev.c
+++ b/lib/librte_ethdev/rte_ethdev.c
@@ -5556,6 +5556,32 @@ rte_eth_devargs_parse(const char *dargs, struct rte_eth_devargs *eth_da)
 	return result;
 }
 
+uint16_t
+rte_eth_representor_id_encode(uint16_t controller, uint16_t pf,
+			      enum rte_eth_representor_type type,
+			      uint16_t representor_port)
+{
+	return (((controller & 3) << 14) |
+		((pf & 3) << 12) |
+		(!!(type == RTE_ETH_REPRESENTOR_SF) << 11) |
+		(representor_port & 0x7ff));
+}
+
+uint16_t
+rte_eth_representor_id_parse(const uint16_t representor_id,
+			     uint16_t *controller, uint16_t *pf,
+			     enum rte_eth_representor_type *type)
+{
+	if (controller)
+		*controller = (representor_id >> 14) & 3;
+	if (pf)
+		*pf = (representor_id >> 12) & 3;
+	if (type)
+		*type = ((representor_id >> 11) & 1) ?
+			RTE_ETH_REPRESENTOR_SF : RTE_ETH_REPRESENTOR_VF;
+	return representor_id & 0x7ff;
+}
+
 static int
 eth_dev_handle_port_list(const char *cmd __rte_unused,
 		const char *params __rte_unused,
diff --git a/lib/librte_ethdev/rte_ethdev_driver.h b/lib/librte_ethdev/rte_ethdev_driver.h
index b9e4a0b9ba..d557b763b6 100644
--- a/lib/librte_ethdev/rte_ethdev_driver.h
+++ b/lib/librte_ethdev/rte_ethdev_driver.h
@@ -1218,6 +1218,57 @@ struct rte_eth_devargs {
 	enum rte_eth_representor_type type; /* type of representor */
 };
 
+/**
+ * PMD helper function to encode representor ID
+ *
+ * The compact format is used for device iterator that comparing
+ * ethdev representor ID with target devargs.
+ *
+ * xxxx xxxx xxxx xxxx
+ * |||| |LLL LLLL LLLL vf/sf id
+ * |||| L 1:sf, 0:vf
+ * ||LL pf id
+ * LL controller(host) id
+ *
+ * @param controller
+ *  Controller ID.
+ * @param pf
+ *  PF port ID.
+ * @param type
+ *  Representor type.
+ * @param representor_port
+ *  Representor port ID.
+ *
+ * @return
+ *   Encoded representor ID.
+ */
+__rte_internal
+uint16_t
+rte_eth_representor_id_encode(uint16_t controller, uint16_t pf,
+			      enum rte_eth_representor_type type,
+			      uint16_t representor_port);
+
+/**
+ * PMD helper function to parse representor ID
+ *
+ * @param representor_id
+ *  Representor ID.
+ * @param controller
+ *  Parsed controller ID.
+ * @param pf
+ *  Parsed PF port ID.
+ * @param type
+ *  Parsed representor type.
+ *
+ * @return
+ *   Parsed representor port ID.
+ */
+__rte_internal
+uint16_t
+rte_eth_representor_id_parse(const uint16_t representor_id,
+			     uint16_t *controller, uint16_t *pf,
+			     enum rte_eth_representor_type *type);
+
 /**
  * PMD helper function to parse ethdev arguments
  *
diff --git a/lib/librte_ethdev/version.map b/lib/librte_ethdev/version.map
index d3f5410806..44edaed507 100644
--- a/lib/librte_ethdev/version.map
+++ b/lib/librte_ethdev/version.map
@@ -257,6 +257,8 @@ INTERNAL {
 	rte_eth_dev_release_port;
 	rte_eth_dev_internal_reset;
 	rte_eth_devargs_parse;
+	rte_eth_representor_id_encode;
+	rte_eth_representor_id_parse;
 	rte_eth_dma_zone_free;
 	rte_eth_dma_zone_reserve;
 	rte_eth_hairpin_queue_peer_bind;
-- 
2.25.1