[PATCH v2 08/18] net/nfp: add support for vnic config bar mapping

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

NFP vNICs use a subset of PCI device BARs. vNIC config bar depends on
firmware symbol defining how to map it through a NFP expansion bar.

This patch adds a NSPU API function for getting a vNIC config bar
mapped through a expansion bar giving a firmware symbol. The PMD will
use the PCI bar offset returned for accessing the vNIC bar.

Signed-off-by: Alejandro Lucero <alejandro.lucero@netronome.com>
---
 drivers/net/nfp/nfp_nspu.c | 13 +++++++++++++
 drivers/net/nfp/nfp_nspu.h |  1 +
 2 files changed, 14 insertions(+)

diff --git a/drivers/net/nfp/nfp_nspu.c b/drivers/net/nfp/nfp_nspu.c
index 5a3ae0e..827f0b2 100644
--- a/drivers/net/nfp/nfp_nspu.c
+++ b/drivers/net/nfp/nfp_nspu.c
@@ -496,3 +496,16 @@
 
 	return 0;
 }
+
+int
+nfp_nsp_map_ctrl_bar(nspu_desc_t *desc, uint64_t *pcie_offset)
+{
+	ssize_t bar0_sym_size;
+
+	if (nfp_nspu_set_bar_from_symbl(desc, "_pf0_net_bar0",
+					NFP_NET_PF_CFG_EXP_BAR,
+					pcie_offset, &bar0_sym_size))
+		return -ENODEV;
+
+	return 0;
+}
diff --git a/drivers/net/nfp/nfp_nspu.h b/drivers/net/nfp/nfp_nspu.h
index c439700..8211f92 100644
--- a/drivers/net/nfp/nfp_nspu.h
+++ b/drivers/net/nfp/nfp_nspu.h
@@ -73,3 +73,4 @@ int nfp_nspu_init(nspu_desc_t *desc, int nfp, int pcie_bar, size_t pcie_barsz,
 		  int exp_bar, void *exp_bar_cfg_base, void *exp_bar_mmap);
 int nfp_nsp_get_abi_version(nspu_desc_t *desc, int *major, int *minor);
 int nfp_nsp_fw_setup(nspu_desc_t *desc, const char *sym, uint64_t *pcie_offset);
+int nfp_nsp_map_ctrl_bar(nspu_desc_t *desc, uint64_t *pcie_offset);
-- 
1.9.1