linux-kernel - [PATCH 2/7] perf/x86/intel/uncore: Factor out uncore_pci_get_die

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Message-Id: <1593709517-108857-3-git-send-email-kan.liang@linux.intel.com>
Date:   Thu,  2 Jul 2020 10:05:12 -0700
From:   kan.liang@...ux.intel.com
To:     peterz@...radead.org, bhelgaas@...gle.com, mingo@...hat.com,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Cc:     jeffrey.t.kirsher@...el.com, olof@...om.net,
        dan.j.williams@...el.com, ak@...ux.intel.com,
        Kan Liang <kan.liang@...ux.intel.com>
Subject: [PATCH 2/7] perf/x86/intel/uncore: Factor out uncore_pci_get_die_info()

From: Kan Liang <kan.liang@...ux.intel.com>

The socket and die information is required when probing the platform
device.

Factor out the codes to get the socket and die information from a BUS
number into a separate function. The function will be used later.

There is no functional change.

Signed-off-by: Kan Liang <kan.liang@...ux.intel.com>
---
 arch/x86/events/intel/uncore.c | 25 +++++++++++++++++--------
 1 file changed, 17 insertions(+), 8 deletions(-)

diff --git a/arch/x86/events/intel/uncore.c b/arch/x86/events/intel/uncore.c
index d5c6d3b..0651ab7 100644
--- a/arch/x86/events/intel/uncore.c
+++ b/arch/x86/events/intel/uncore.c
@@ -988,6 +988,20 @@ uncore_types_init(struct intel_uncore_type **types, bool setid)
 	return 0;
 }
 
+static int uncore_pci_get_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 +1012,9 @@ 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_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);
-- 
2.7.4