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

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When an uncore PCI sub driver gets a remove notification, the
corresponding PMU has to be retrieved and unregistered. The codes, which
find the corresponding PMU by comparing the pci_device_id table, can be
shared.

Factor out uncore_pci_find_dev_pmu(), 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/1600094060-82746-3-git-send-email-kan.liang@linux.intel.com
This commit is contained in:
Kan Liang 2020-09-14 07:34:16 -07:00 committed by Peter Zijlstra
parent fe6507338d
commit 8ed2ccaa3f
1 changed files with 32 additions and 14 deletions
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46
arch/x86/events/intel/uncore.c
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@ -1008,6 +1008,37 @@ static int uncore_pci_get_dev_die_info(struct pci_dev *pdev,
return 0;
}
/*
* Find the PMU of a PCI device.
* @pdev: The PCI device.
* @ids: The ID table of the available PCI devices with a PMU.
*/
static struct intel_uncore_pmu *
uncore_pci_find_dev_pmu(struct pci_dev *pdev, const struct pci_device_id *ids)
{
struct intel_uncore_pmu *pmu = NULL;
struct intel_uncore_type *type;
kernel_ulong_t data;
unsigned int devfn;
while (ids && ids->vendor) {
if ((ids->vendor == pdev->vendor) &&
(ids->device == pdev->device)) {
data = ids->driver_data;
devfn = PCI_DEVFN(UNCORE_PCI_DEV_DEV(data),
UNCORE_PCI_DEV_FUNC(data));
if (devfn == pdev->devfn) {
type = uncore_pci_uncores[UNCORE_PCI_DEV_TYPE(data)];
pmu = &type->pmus[UNCORE_PCI_DEV_IDX(data)];
break;
}
}
ids++;
}
return pmu;
}
/*
* add a pci uncore device
*/
@ -1039,21 +1070,8 @@ static int uncore_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id
*/
if (id->driver_data & ~0xffff) {
struct pci_driver *pci_drv = pdev->driver;
const struct pci_device_id *ids = pci_drv->id_table;
unsigned int devfn;
while (ids && ids->vendor) {
if ((ids->vendor == pdev->vendor) &&
(ids->device == pdev->device)) {
devfn = PCI_DEVFN(UNCORE_PCI_DEV_DEV(ids->driver_data),
UNCORE_PCI_DEV_FUNC(ids->driver_data));
if (devfn == pdev->devfn) {
pmu = &type->pmus[UNCORE_PCI_DEV_IDX(ids->driver_data)];
break;
}
}
ids++;
}
pmu = uncore_pci_find_dev_pmu(pdev, pci_drv->id_table);
if (pmu == NULL)
return -ENODEV;
} else {