Re: [PATCH v4 3/4] drivers/perf: add DesignWare PCIe PMU driver

[Shuai Xue]

On 2023/5/17 03:19, Bjorn Helgaas wrote:
> On Tue, May 16, 2023 at 09:01:09PM +0800, Shuai Xue wrote:
>> ...
> 
>> +#include <linux/pci.h>
>> +#include <linux/bitfield.h>
>> +#include <linux/bitops.h>
>> +#include <linux/cpuhotplug.h>
>> +#include <linux/cpumask.h>
>> +#include <linux/device.h>
>> +#include <linux/errno.h>
>> +#include <linux/kernel.h>
>> +#include <linux/list.h>
>> +#include <linux/perf_event.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/smp.h>
>> +#include <linux/sysfs.h>
>> +#include <linux/types.h>
> 
> Typically in alpha order.

Got it, I will reorder them.

> 
>> +#define DWC_PCIE_VSEC_RAS_DES_ID		0x02
>> +
>> +#define DWC_PCIE_EVENT_CNT_CTL			0x8
> 
> Add a blank line here.

Sure, will add it.

> 
>> +/*
>> + * Event Counter Data Select includes two parts:
> 
>> +#define DWC_PCIE_EVENT_CNT_DATA			0xC
>> +#define DWC_PCIE_DURATION_4US			0xff
> ...
> Pick upper-case hex or lower-case hex and use consistently.

Will pick upper-case hex for all macros.

> 
>> +#define DWC_PCIE_LANE_EVENT_MAX_PERIOD		(GENMASK_ULL(31, 0))
>> +#define DWC_PCIE_TIME_BASED_EVENT_MAX_PERIOD	(GENMASK_ULL(63, 0))
> 
> Unnecessary outer "()".

Ok, will remove it.

> 
>> +struct dwc_pcie_pmu {
>> +	struct pci_dev		*pdev;		/* Root Port device */
>> +	u32			ras_des;	/* RAS DES capability offset */
> 
> u16 is enough to address all of config space.

Go it. will fix in next version.

Thank you :)

Best Regards,
Shuai