From: Robin Murphy <robin.murphy@arm.com>
To: Shuai Xue <xueshuai@linux.alibaba.com>,
Jonathan Cameron <Jonathan.Cameron@huawei.com>,
Bjorn Helgaas <helgaas@kernel.org>
Cc: will@kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, rdunlap@infradead.org,
mark.rutland@arm.com, baolin.wang@linux.alibaba.com,
zhuo.song@linux.alibaba.com, linux-pci@vger.kernel.org
Subject: Re: [PATCH v1 2/3] drivers/perf: add DesignWare PCIe PMU driver
Date: Mon, 26 Sep 2022 15:32:47 +0100 [thread overview]
Message-ID: <ae249149-a17f-7652-729b-262a977080a5@arm.com> (raw)
In-Reply-To: <89efd20f-65f2-c082-1eb4-4e308957ff59@linux.alibaba.com>
On 2022-09-26 14:31, Shuai Xue wrote:
> + Bjorn Helgaas
>
> 在 2022/9/23 PM11:54, Jonathan Cameron 写道:
>>
>>>
>>>>
>>>>> +#define RP_NUM_MAX 32 /* 2die * 4RC * 4Ctrol */
>>>>
>>>> This driver is 'almost' generic. So if you an avoid defines based on a particular
>>>> platform that's definitely good!
>>>
>>> Good idea. How about defining RP_NUM_MAX as 64? As fars as I know,
>>> some platfrom use 2 sockets, 2 die per socket.
>>> Then 2 sockets * 2 dies * 4 Root Complex * 4 root port.
>>
>> Setting a reasonable maximum is fine - but make sure the code then fails with
>> a suitable error message if there are more!
>
> OK, I will add a discovery logic here and count PMU number at runtime.
>
>>
>>
>>>>> +#define DWC_PCIE_LANE_SHIFT 4
>>>>> +#define DWC_PCIE_LANE_MASK GENMASK(9, 4)
>>>>> +
>>>>> +#define DWC_PCIE_EVENT_CNT_CTRL 0x8
>>>>> +#define DWC_PCIE__CNT_EVENT_SELECT_SHIFT 16
>>>>
>>>> Why double __? If point is , then
>>>> naming works better
>>>> DWC_PCIE_EVENT_CNT_CTRL_REG
>>>> DWC_PCIE_EVENT_CNT_CTRL_EV_SELECT_MSK etc
>>>
>>> Yes, I point to use double `__` to indicate it is a field of register,
>>> as CMN and CCN drivers do. I also considered naming with REG explicitly,
>>> but the macro is so long that I often have to wrap code into multilines.
>>> Any way, it's fine to rename if you still suggest to do so.
>>
>> I don't particularly mind. This convention was new to me.
>
> Haha, then I will leave the double `__` as CMN and CCN drivers do.
FWIW I'm not sure there's really any convention. CCN seems to use
double-underscores as distinct separators in a consistent
CCN_REG_NAME__FIELD_NAME__SUFFIX pattern. Conversely in CMN I used it as
an indication of the usual CMN_REG_NAME_FIELD_NAME_VALUE pattern being
abbreviated where it would have been uncomfortably long otherwise (and
particularly where the field name reflects the register name anyway); it
just seemed like a good visual cue to imply that something was missing.
Robin.
next prev parent reply other threads:[~2022-09-26 15:48 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20220917121036.14864-1-xueshuai@linux.alibaba.com>
[not found] ` <20220917121036.14864-3-xueshuai@linux.alibaba.com>
2022-09-22 15:58 ` [PATCH v1 2/3] drivers/perf: add DesignWare PCIe PMU driver Jonathan Cameron
2022-09-22 17:32 ` Bjorn Helgaas
2022-09-23 3:35 ` Yicong Yang
2022-09-23 10:56 ` Jonathan Cameron
2022-09-23 13:45 ` Shuai Xue
2022-09-23 15:54 ` Jonathan Cameron
2022-09-26 13:31 ` Shuai Xue
2022-09-26 14:32 ` Robin Murphy [this message]
2022-09-26 17:18 ` Bjorn Helgaas
2022-09-27 5:13 ` Shuai Xue
2022-09-27 10:04 ` Jonathan Cameron
2022-09-27 10:14 ` Robin Murphy
2022-09-27 12:49 ` Shuai Xue
2022-09-27 13:39 ` Jonathan Cameron
2022-09-27 12:29 ` Shuai Xue
2022-09-27 10:03 ` Jonathan Cameron
2022-09-22 17:36 ` Bjorn Helgaas
2022-09-23 14:46 ` Shuai Xue
2022-09-23 18:51 ` Bjorn Helgaas
2022-09-27 6:01 ` Shuai Xue
2023-04-10 3:16 ` [PATCH v2 0/3] drivers/perf: add Synopsys DesignWare PCIe PMU driver support Shuai Xue
2023-04-10 3:17 ` [PATCH v2 1/3] docs: perf: Add description for Synopsys DesignWare PCIe PMU driver Shuai Xue
2023-04-10 3:17 ` [PATCH v2 2/3] drivers/perf: add " Shuai Xue
2023-04-10 7:25 ` kernel test robot
2023-04-11 3:17 ` Baolin Wang
2023-04-17 1:16 ` Shuai Xue
2023-04-18 1:51 ` Baolin Wang
2023-04-19 1:39 ` Shuai Xue
2023-04-10 3:17 ` [PATCH v2 3/3] MAINTAINERS: add maintainers for " Shuai Xue
2023-04-17 6:17 ` [PATCH v3 0/3] drivers/perf: add Synopsys DesignWare PCIe PMU driver support Shuai Xue
2023-04-17 6:17 ` [PATCH v3 1/3] docs: perf: Add description for Synopsys DesignWare PCIe PMU driver Shuai Xue
2023-05-16 14:32 ` Jonathan Cameron
2023-05-17 1:27 ` Shuai Xue
2023-04-17 6:17 ` [PATCH v3 2/3] drivers/perf: add " Shuai Xue
2023-04-18 23:30 ` Robin Murphy
2023-04-27 6:33 ` Shuai Xue
2023-05-09 2:02 ` Shuai Xue
2023-05-16 15:03 ` Jonathan Cameron
2023-05-16 19:17 ` Bjorn Helgaas
2023-05-17 9:54 ` Jonathan Cameron
2023-05-17 16:27 ` Bjorn Helgaas
2023-05-19 10:08 ` Shuai Xue
2023-04-17 6:17 ` [PATCH v3 3/3] MAINTAINERS: add maintainers for " Shuai Xue
2023-05-16 13:01 ` [PATCH v4 0/4] drivers/perf: add Synopsys DesignWare PCIe PMU driver support Shuai Xue
2023-05-16 13:01 ` [PATCH v4 1/4] docs: perf: Add description for Synopsys DesignWare PCIe PMU driver Shuai Xue
2023-05-16 13:01 ` [PATCH v4 2/4] PCI: move Alibaba Vendor ID linux/pci_ids.h Shuai Xue
2023-05-16 13:01 ` [PATCH v4 3/4] drivers/perf: add DesignWare PCIe PMU driver Shuai Xue
2023-05-16 19:19 ` Bjorn Helgaas
2023-05-17 2:35 ` Shuai Xue
[not found] ` <202305170639.XU3djFZX-lkp@intel.com>
2023-05-17 3:37 ` Shuai Xue
2023-05-16 13:01 ` [PATCH v4 4/4] MAINTAINERS: add maintainers for " Shuai Xue
2023-05-22 3:54 ` [PATCH v5 0/4] drivers/perf: add Synopsys DesignWare PCIe PMU driver support Shuai Xue
2023-05-22 14:28 ` Jonathan Cameron
2023-05-23 2:57 ` Shuai Xue
2023-05-22 3:54 ` [PATCH v5 1/4] docs: perf: Add description for Synopsys DesignWare PCIe PMU driver Shuai Xue
2023-05-29 3:45 ` Baolin Wang
2023-05-29 6:31 ` Shuai Xue
2023-05-22 3:54 ` [PATCH v5 2/4] PCI: move Alibaba Vendor ID linux/pci_ids.h Shuai Xue
2023-05-22 16:04 ` Bjorn Helgaas
2023-05-23 3:22 ` Shuai Xue
2023-05-23 11:54 ` Bjorn Helgaas
2023-05-23 12:49 ` Shuai Xue
2023-05-22 3:54 ` [PATCH v5 3/4] drivers/perf: add DesignWare PCIe PMU driver Shuai Xue
2023-05-29 6:13 ` Baolin Wang
2023-05-29 6:33 ` Shuai Xue
2023-05-22 3:54 ` [PATCH v5 4/4] MAINTAINERS: add maintainers for " Shuai Xue
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=ae249149-a17f-7652-729b-262a977080a5@arm.com \
--to=robin.murphy@arm.com \
--cc=Jonathan.Cameron@huawei.com \
--cc=baolin.wang@linux.alibaba.com \
--cc=helgaas@kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=rdunlap@infradead.org \
--cc=will@kernel.org \
--cc=xueshuai@linux.alibaba.com \
--cc=zhuo.song@linux.alibaba.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).