perf/x86/intel/uncore: Factor out uncore_pci_get_dev_die_info()

The socket and die information is required to register/unregister a PMU
in the uncore PCI sub driver. The codes, which get the socket and die
information from a BUS number, can be shared.

Factor out uncore_pci_get_dev_die_info(), which will be used later.

There is no functional change.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/1600094060-82746-2-git-send-email-kan.liang@linux.intel.com

diff --git a/arch/x86/events/intel/uncore.c b/arch/x86/events/intel/uncore.c
index d5c6d3b..e14b03f 100644 (file)
--- a/arch/x86/events/intel/uncore.c
+++ b/arch/x86/events/intel/uncore.c
@@ -988,6 +988,26 @@ uncore_types_init(struct intel_uncore_type **types, bool setid)
        return 0;
 }
 
+/*
+ * Get the die information of a PCI device.
+ * @pdev: The PCI device.
+ * @phys_id: The physical socket id which the device maps to.
+ * @die: The die id which the device maps to.
+ */
+static int uncore_pci_get_dev_die_info(struct pci_dev *pdev,
+                                      int *phys_id, int *die)
+{
+       *phys_id = uncore_pcibus_to_physid(pdev->bus);
+       if (*phys_id < 0)
+               return -ENODEV;
+
+       *die = (topology_max_die_per_package() > 1) ? *phys_id :
+                               topology_phys_to_logical_pkg(*phys_id);
+       if (*die < 0)
+               return -EINVAL;
+
+       return 0;
+}
 /*
  * add a pci uncore device
  */
@@ -998,14 +1018,9 @@ static int uncore_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id
        struct intel_uncore_box *box;
        int phys_id, die, ret;
 
-       phys_id = uncore_pcibus_to_physid(pdev->bus);
-       if (phys_id < 0)
-               return -ENODEV;
-
-       die = (topology_max_die_per_package() > 1) ? phys_id :
-                                       topology_phys_to_logical_pkg(phys_id);
-       if (die < 0)
-               return -EINVAL;
+       ret = uncore_pci_get_dev_die_info(pdev, &phys_id, &die);
+       if (ret)
+               return ret;
 
        if (UNCORE_PCI_DEV_TYPE(id->driver_data) == UNCORE_EXTRA_PCI_DEV) {
                int idx = UNCORE_PCI_DEV_IDX(id->driver_data);