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hwtracing: hisi_ptt: Factor out filter allocation and release operation

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Factor out the allocation and release of filters. This will make it easier
to extend and manage the function of the filter.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20230621092804.15120-2-yangyicong@huawei.com
This commit is contained in:
Yicong Yang 2023-06-21 17:28:00 +08:00 committed by Suzuki K Poulose
parent 185891f03f
commit a3ecaba701
1 changed files with 39 additions and 24 deletions
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63
drivers/hwtracing/ptt/hisi_ptt.c
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@ -354,6 +354,39 @@ static int hisi_ptt_register_irq(struct hisi_ptt *hisi_ptt)
return 0;
}
static void hisi_ptt_del_free_filter(struct hisi_ptt *hisi_ptt,
struct hisi_ptt_filter_desc *filter)
{
list_del(&filter->list);
kfree(filter);
}
static struct hisi_ptt_filter_desc *
hisi_ptt_alloc_add_filter(struct hisi_ptt *hisi_ptt, struct pci_dev *pdev)
{
struct hisi_ptt_filter_desc *filter;
filter = kzalloc(sizeof(*filter), GFP_KERNEL);
if (!filter) {
pci_err(hisi_ptt->pdev, "failed to add filter for %s\n",
pci_name(pdev));
return NULL;
}
filter->devid = PCI_DEVID(pdev->bus->number, pdev->devfn);
filter->is_port = pci_pcie_type(pdev) == PCI_EXP_TYPE_ROOT_PORT;
if (filter->is_port) {
list_add_tail(&filter->list, &hisi_ptt->port_filters);
/* Update the available port mask */
hisi_ptt->port_mask |= hisi_ptt_get_filter_val(filter->devid, true);
} else {
list_add_tail(&filter->list, &hisi_ptt->req_filters);
}
return filter;
}
static int hisi_ptt_init_filters(struct pci_dev *pdev, void *data)
{
struct pci_dev *root_port = pcie_find_root_port(pdev);
@ -374,23 +407,9 @@ static int hisi_ptt_init_filters(struct pci_dev *pdev, void *data)
* should be partial initialized and users would know which filter fails
* through the log. Other functions of PTT device are still available.
*/
filter = kzalloc(sizeof(*filter), GFP_KERNEL);
if (!filter) {
pci_err(hisi_ptt->pdev, "failed to add filter %s\n", pci_name(pdev));
filter = hisi_ptt_alloc_add_filter(hisi_ptt, pdev);
if (!filter)
return -ENOMEM;
}
filter->devid = PCI_DEVID(pdev->bus->number, pdev->devfn);
if (pci_pcie_type(pdev) == PCI_EXP_TYPE_ROOT_PORT) {
filter->is_port = true;
list_add_tail(&filter->list, &hisi_ptt->port_filters);
/* Update the available port mask */
hisi_ptt->port_mask |= hisi_ptt_get_filter_val(filter->devid, true);
} else {
list_add_tail(&filter->list, &hisi_ptt->req_filters);
}
return 0;
}
@ -400,15 +419,11 @@ static void hisi_ptt_release_filters(void *data)
struct hisi_ptt_filter_desc *filter, *tmp;
struct hisi_ptt *hisi_ptt = data;
list_for_each_entry_safe(filter, tmp, &hisi_ptt->req_filters, list) {
list_del(&filter->list);
kfree(filter);
}
list_for_each_entry_safe(filter, tmp, &hisi_ptt->req_filters, list)
hisi_ptt_del_free_filter(hisi_ptt, filter);
list_for_each_entry_safe(filter, tmp, &hisi_ptt->port_filters, list) {
list_del(&filter->list);
kfree(filter);
}
list_for_each_entry_safe(filter, tmp, &hisi_ptt->port_filters, list)
hisi_ptt_del_free_filter(hisi_ptt, filter);
}
static int hisi_ptt_config_trace_buf(struct hisi_ptt *hisi_ptt)