[dpdk-dev] [PATCH 02/16] nfp: add specific pf probe function

[Alejandro Lucero <alejandro.lucero@netronome.com>]

Configuring the NFP PMD for using the PF requires access through the
NSPU interface for device configuration. This patch adds a specific probe
function for the PF which uses the NSPU interface. Just basic NSPU access
is done by now reading the NSPU ABI version.

No ethernet port is created yet.

Signed-off-by: Alejandro Lucero <alejandro.lucero@netronome.com>
---
 drivers/net/nfp/nfp_net.c | 75 +++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 69 insertions(+), 6 deletions(-)

diff --git a/drivers/net/nfp/nfp_net.c b/drivers/net/nfp/nfp_net.c
index a3bf5e1..e2fe83a 100644
--- a/drivers/net/nfp/nfp_net.c
+++ b/drivers/net/nfp/nfp_net.c
@@ -59,6 +59,8 @@
 #include "nfp_net_logs.h"
 #include "nfp_net_ctrl.h"
 
+#include "nfp_nfpu.h"
+
 /* Prototypes */
 static void nfp_net_close(struct rte_eth_dev *dev);
 static int nfp_net_configure(struct rte_eth_dev *dev);
@@ -2632,12 +2634,63 @@ uint32_t nfp_net_txq_full(struct nfp_net_txq *txq)
 	return 0;
 }
 
-static const struct rte_pci_id pci_id_nfp_net_map[] = {
+static int nfp_pf_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
+			    struct rte_pci_device *dev)
+{
+	nfpu_desc_t *nfpu_desc;
+	nspu_desc_t *nspu_desc;
+	int major, minor;
+
+	if (!dev)
+		return -ENODEV;
+
+	nfpu_desc = rte_malloc("nfp nfpu", sizeof(nfpu_desc_t), 0);
+	if (!nfpu_desc)
+		return -ENOMEM;
+
+	if (nfpu_open(dev, nfpu_desc, 0) < 0) {
+		RTE_LOG(ERR, PMD,
+			"nfpu_open failed\n");
+		goto nfpu_error;
+	}
+
+	nspu_desc = nfpu_desc->nspu;
+
+
+	/* Check NSP ABI version */
+	if (nfp_nsp_get_abi_version(nspu_desc, &major, &minor) < 0) {
+		RTE_LOG(INFO, PMD, "NFP NSP not present\n");
+		goto no_abi;
+	}
+	PMD_INIT_LOG(INFO, "nspu ABI version: %d.%d\n", major, minor);
+
+	if (minor < 20) {
+		RTE_LOG(INFO, PMD, "NFP NSP ABI version too old. Required 0.20 or higher\n");
+		goto no_abi;
+	}
+
+	/* No port is created yet */
+
+no_abi:
+	nfpu_close(nfpu_desc);
+nfpu_error:
+	rte_free(nfpu_desc);
+
+	return -ENODEV;
+}
+
+static const struct rte_pci_id pci_id_nfp_pf_net_map[] = {
 	{
 		RTE_PCI_DEVICE(PCI_VENDOR_ID_NETRONOME,
 			       PCI_DEVICE_ID_NFP6000_PF_NIC)
 	},
 	{
+		.vendor_id = 0,
+	},
+};
+
+static const struct rte_pci_id pci_id_nfp_vf_net_map[] = {
+	{
 		RTE_PCI_DEVICE(PCI_VENDOR_ID_NETRONOME,
 			       PCI_DEVICE_ID_NFP6000_VF_NIC)
 	},
@@ -2658,16 +2711,26 @@ static int eth_nfp_pci_remove(struct rte_pci_device *pci_dev)
 	return rte_eth_dev_pci_generic_remove(pci_dev, NULL);
 }
 
-static struct rte_pci_driver rte_nfp_net_pmd = {
-	.id_table = pci_id_nfp_net_map,
+static struct rte_pci_driver rte_nfp_net_pf_pmd = {
+	.id_table = pci_id_nfp_pf_net_map,
+	.drv_flags = RTE_PCI_DRV_NEED_MAPPING | RTE_PCI_DRV_INTR_LSC,
+	.probe = nfp_pf_pci_probe,
+	.remove = eth_nfp_pci_remove,
+};
+
+static struct rte_pci_driver rte_nfp_net_vf_pmd = {
+	.id_table = pci_id_nfp_vf_net_map,
 	.drv_flags = RTE_PCI_DRV_NEED_MAPPING | RTE_PCI_DRV_INTR_LSC,
 	.probe = eth_nfp_pci_probe,
 	.remove = eth_nfp_pci_remove,
 };
 
-RTE_PMD_REGISTER_PCI(net_nfp, rte_nfp_net_pmd);
-RTE_PMD_REGISTER_PCI_TABLE(net_nfp, pci_id_nfp_net_map);
-RTE_PMD_REGISTER_KMOD_DEP(net_nfp, "* igb_uio | uio_pci_generic | vfio-pci");
+RTE_PMD_REGISTER_PCI(net_nfp_pf, rte_nfp_net_pf_pmd);
+RTE_PMD_REGISTER_PCI(net_nfp_vf, rte_nfp_net_vf_pmd);
+RTE_PMD_REGISTER_PCI_TABLE(net_nfp_pf, pci_id_nfp_pf_net_map);
+RTE_PMD_REGISTER_PCI_TABLE(net_nfp_vf, pci_id_nfp_vf_net_map);
+RTE_PMD_REGISTER_KMOD_DEP(net_nfp_pf, "* igb_uio | uio_pci_generic | vfio");
+RTE_PMD_REGISTER_KMOD_DEP(net_nfp_vf, "* igb_uio | uio_pci_generic | vfio");
 
 /*
  * Local variables:
-- 
1.9.1