nfp: add nfp_cppcore_pcie_unit() helper

Add nfp_cppcore_pcie_unit() helper to retrieve the PCIE unit of a CPP
handle and use the new helper as appropriate.
Signed-off-by: NSimon Horman <simon.horman@netronome.com>
Reviewed-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/netronome/nfp/nfp_net_main.c

@@ -190,15 +190,11 @@ nfp_net_find_port(struct nfp_eth_table *eth_tbl, unsigned int id)
 static unsigned int nfp_net_pf_get_num_ports(struct nfp_pf *pf)
 {
 	char name[256];
-	u16 interface;
-	int pcie_pf;
 	int err = 0;
 	u64 val;
 
-	interface = nfp_cpp_interface(pf->cpp);
-	pcie_pf = NFP_CPP_INTERFACE_UNIT_of(interface);
-
-	snprintf(name, sizeof(name), "nfd_cfg_pf%d_num_ports", pcie_pf);
+	snprintf(name, sizeof(name), "nfd_cfg_pf%u_num_ports",
+		 nfp_cppcore_pcie_unit(pf->cpp));
 
 	val = nfp_rtsym_read_le(pf->cpp, name, &err);
 	/* Default to one port */
@@ -241,13 +237,9 @@ static u8 __iomem *nfp_net_pf_map_ctrl_bar(struct nfp_pf *pf)
 	const struct nfp_rtsym *ctrl_sym;
 	u8 __iomem *ctrl_bar;
 	char pf_symbol[256];
-	u16 interface;
-	int pcie_pf;
-
-	interface = nfp_cpp_interface(pf->cpp);
-	pcie_pf = NFP_CPP_INTERFACE_UNIT_of(interface);
 
-	snprintf(pf_symbol, sizeof(pf_symbol), "_pf%d_net_bar0", pcie_pf);
+	snprintf(pf_symbol, sizeof(pf_symbol), "_pf%u_net_bar0",
+		 nfp_cppcore_pcie_unit(pf->cpp));
 
 	ctrl_sym = nfp_rtsym_lookup(pf->cpp, pf_symbol);
 	if (!ctrl_sym) {

drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cpp.h

@@ -289,6 +289,17 @@ int nfp_cpp_mutex_lock(struct nfp_cpp_mutex *mutex);
 int nfp_cpp_mutex_unlock(struct nfp_cpp_mutex *mutex);
 int nfp_cpp_mutex_trylock(struct nfp_cpp_mutex *mutex);
 
+/**
+ * nfp_cppcore_pcie_unit() - Get PCI Unit of a CPP handle
+ * @cpp:	CPP handle
+ *
+ * Return: PCI unit for the NFP CPP handle
+ */
+static inline u8 nfp_cppcore_pcie_unit(struct nfp_cpp *cpp)
+{
+	return NFP_CPP_INTERFACE_UNIT_of(nfp_cpp_interface(cpp));
+}
+
 struct nfp_cpp_explicit;
 
 struct nfp_cpp_explicit_command {