[dpdk-dev] [PATCH v2 08/41] common/mlx5: derive PCI addr from device path

[Srikanth Kaka]

Using syctl call the PCI addr is derived
dev.mlx5_core.0.%location: slot=8 function=0 dbsf=pci0:0:8:0

Signed-off-by: Srikanth Kaka <srikanth.k at oneconvergence.com>
Signed-off-by: Vag Singh <vag.singh at oneconvergence.com>
Signed-off-by: Anand Thulasiram <avelu at juniper.net>
---
 drivers/common/mlx5/freebsd/mlx5_common_os.c | 48 ++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/drivers/common/mlx5/freebsd/mlx5_common_os.c b/drivers/common/mlx5/freebsd/mlx5_common_os.c
index 23370857eb..aa3b73f8a8 100644
--- a/drivers/common/mlx5/freebsd/mlx5_common_os.c
+++ b/drivers/common/mlx5/freebsd/mlx5_common_os.c
@@ -14,6 +14,54 @@
 #include "mlx5_common_os.h"
 #include "mlx5_glue.h"
 
+/**
+ * Derive PCI address from devpath
+ */
+int
+mlx5_get_pci_addr(const char *dev_path, struct rte_pci_addr *pci_addr)
+{
+	char id[10];
+	char searchstr[MLX5_SYSCTL_BY_NAME_SIZE];
+	size_t length = MLX5_SYSCTL_BY_NAME_SIZE;
+	char name[MLX5_SYSCTL_BY_NAME_SIZE];
+	int traverse = 0;
+
+	strncpy(id, &dev_path[strlen("/sys/class/infiniband/mlx5_")],
+		strlen(dev_path) - strlen("/sys/class/infiniband/mlx5_"));
+	sprintf(searchstr, "dev.mlx5_core.%s.%slocation", id, "%");
+	sysctlbyname(searchstr, &name, &length, NULL, 0);
+
+	while (name[traverse]) {
+		if (name[traverse] == 'p' && name[traverse + 1] == 'c' &&
+				name[traverse + 2] == 'i')
+			break;
+		++traverse;
+	}
+	traverse += 3;
+
+	int end = traverse;
+
+	while (name[end] != ' ')
+		++end;
+
+	char address[end - traverse + 1];
+
+	memcpy(address, &name[traverse], end - traverse);
+	address[end - traverse] = '\0';
+
+	char *ptr = strtok(address, " :");
+
+	pci_addr->domain = (uint32_t)atoi(ptr);
+	ptr = strtok(NULL, " :");
+	pci_addr->bus = (uint8_t)atoi(ptr);
+	ptr =   strtok(NULL, " :");
+	pci_addr->devid = (uint8_t)atoi(ptr);
+	ptr =   strtok(NULL, " :");
+	pci_addr->function = (uint8_t)atoi(ptr);
+
+	return 0;
+}
+
 /**
  * Derive IB dev index from devpath
  */
-- 
2.30.2