net/nfp: avoid sysfs resource file access

Getting the bar size is required for NFP CPP interface configuration.
However, this information can be obtained from the VFIO or UIO driver
instead of accessing the sysfs resource file.

Signed-off-by: Alejandro Lucero <alejandro.lucero@netronome.com>

diff --git a/drivers/net/nfp/nfpcore/nfp_cpp_pcie_ops.c b/drivers/net/nfp/nfpcore/nfp_cpp_pcie_ops.c
index 2a1ec96..ca50474 100644 (file)
--- a/drivers/net/nfp/nfpcore/nfp_cpp_pcie_ops.c
+++ b/drivers/net/nfp/nfpcore/nfp_cpp_pcie_ops.c
@@ -762,33 +762,16 @@ nfp6000_set_serial(struct rte_pci_device *dev, struct nfp_cpp *cpp)
 }
 
 static int
-nfp6000_set_barsz(struct nfp_pcie_user *desc)
+nfp6000_set_barsz(struct rte_pci_device *dev, struct nfp_pcie_user *desc)
 {
-       char tmp_str[80];
-       unsigned long start, end, flags, tmp;
-       int i;
-       FILE *fp;
-
-       snprintf(tmp_str, sizeof(tmp_str), "%s/%s/resource", PCI_DEVICES,
-                desc->busdev);
-
-       fp = fopen(tmp_str, "r");
-       if (!fp)
-               return -1;
+       unsigned long tmp;
+       int i = 0;
 
-       if (fscanf(fp, "0x%lx 0x%lx 0x%lx", &start, &end, &flags) == 0) {
-               printf("error reading resource file for bar size\n");
-               fclose(fp);
-               return -1;
-       }
+       tmp = dev->mem_resource[0].len;
 
-       if (fclose(fp) == -1)
-               return -1;
-
-       tmp = (end - start) + 1;
-       i = 0;
        while (tmp >>= 1)
                i++;
+
        desc->barsz = i;
        return 0;
 }
@@ -841,7 +824,7 @@ nfp6000_init(struct nfp_cpp *cpp, struct rte_pci_device *dev)
                return -1;
        if (nfp6000_set_serial(dev, cpp) < 0)
                return -1;
-       if (nfp6000_set_barsz(desc) < 0)
+       if (nfp6000_set_barsz(dev, desc) < 0)
                return -1;
 
        desc->cfg = (char *)mmap(0, 1 << (desc->barsz - 3),