[dpdk-dev] [PATCH] net/nfp: avoid sysfs resource file access

[Alejandro Lucero]

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.luc...@netronome.com>
---
 drivers/net/nfp/nfpcore/nfp_cpp_pcie_ops.c | 27 +++++----------------------
 1 file changed, 5 insertions(+), 22 deletions(-)

diff --git a/drivers/net/nfp/nfpcore/nfp_cpp_pcie_ops.c 
b/drivers/net/nfp/nfpcore/nfp_cpp_pcie_ops.c
index 2a1ec96..b0beb8d 100644
--- a/drivers/net/nfp/nfpcore/nfp_cpp_pcie_ops.c
+++ b/drivers/net/nfp/nfpcore/nfp_cpp_pcie_ops.c
@@ -762,33 +762,16 @@ struct nfp6000_area_priv {
 }
 
 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;
 }
-- 
1.9.1