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From b742910272bb95daf42ab449c1077afa4aa79142 Mon Sep 17 00:00:00 2001
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From: Alejandro Lucero <alejandro.lucero@netronome.com>
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Date: Tue, 26 Jun 2018 14:25:40 +0100
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Subject: [PATCH 1/2] net/nfp: avoid sysfs resource file access
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Getting the bar size is required for NFP CPP interface configuration.
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However, this information can be obtained from the VFIO or UIO driver
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instead of accessing the sysfs resource file.
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Signed-off-by: Alejandro Lucero <alejandro.lucero@netronome.com>
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(cherry picked from commit e3cfaf02dcd88635ac614a1e1a8efe45d38ea4c9)
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---
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drivers/net/nfp/nfpcore/nfp_cpp_pcie_ops.c | 28 +++++-----------------
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1 file changed, 6 insertions(+), 22 deletions(-)
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diff --git a/drivers/net/nfp/nfpcore/nfp_cpp_pcie_ops.c b/drivers/net/nfp/nfpcore/nfp_cpp_pcie_ops.c
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index 7d132baa9..9accc89cf 100644
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--- a/drivers/net/nfp/nfpcore/nfp_cpp_pcie_ops.c
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+++ b/drivers/net/nfp/nfpcore/nfp_cpp_pcie_ops.c
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@@ -761,32 +761,16 @@ nfp6000_set_serial(struct rte_pci_device *dev, struct nfp_cpp *cpp)
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}
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static int
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-nfp6000_set_barsz(struct nfp_pcie_user *desc)
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+nfp6000_set_barsz(struct rte_pci_device *dev, struct nfp_pcie_user *desc)
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{
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- char tmp_str[80];
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- unsigned long start, end, flags, tmp;
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- int i;
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- FILE *fp;
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-
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- snprintf(tmp_str, sizeof(tmp_str), "%s/%s/resource", PCI_DEVICES,
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- desc->busdev);
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-
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- fp = fopen(tmp_str, "r");
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- if (!fp)
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- return -1;
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+ unsigned long tmp;
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+ int i = 0;
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- if (fscanf(fp, "0x%lx 0x%lx 0x%lx", &start, &end, &flags) == 0) {
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- printf("error reading resource file for bar size\n");
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- return -1;
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- }
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+ tmp = dev->mem_resource[0].len;
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- if (fclose(fp) == -1)
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- return -1;
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-
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- tmp = (end - start) + 1;
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- i = 0;
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while (tmp >>= 1)
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i++;
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+
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desc->barsz = i;
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return 0;
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}
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@@ -839,7 +823,7 @@ nfp6000_init(struct nfp_cpp *cpp, struct rte_pci_device *dev)
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return -1;
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if (nfp6000_set_serial(dev, cpp) < 0)
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return -1;
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- if (nfp6000_set_barsz(desc) < 0)
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+ if (nfp6000_set_barsz(dev, desc) < 0)
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return -1;
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desc->cfg = (char *)mmap(0, 1 << (desc->barsz - 3),
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--
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2.17.1
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