net/nfp: support vNIC config BAR mapping

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>

diff --git a/drivers/net/nfp/nfp_nspu.c b/drivers/net/nfp/nfp_nspu.c
index 5a3ae0e..827f0b2 100644 (file)
--- a/drivers/net/nfp/nfp_nspu.c
+++ b/drivers/net/nfp/nfp_nspu.c
@@ -496,3 +496,16 @@ nfp_nsp_fw_setup(nspu_desc_t *desc, const char *sym, uint64_t *pcie_offset)
 
        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 (file)
--- 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);