From: Oliver Neukum <oneukum@suse.de>
To: Yijing Wang <wangyijing@huawei.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
Hanjun Guo <guohanjun@huawei.com>,
Paul Bolle <pebolle@tiscali.nl>,
"RafaelJ.Wysocki" <rjw@rjwysocki.net>,
Gu Zheng <guz.fnst@cn.fujitsu.com>
Subject: Re: [PATCH part1 v5 3/7] PCI: Add support for Device Serial Number capability
Date: Mon, 10 Feb 2014 11:21:58 +0100 [thread overview]
Message-ID: <1392027718.2082.11.camel@linux-fkkt.site> (raw)
In-Reply-To: <1392005051-54508-4-git-send-email-wangyijing@huawei.com>
On Mon, 2014-02-10 at 12:04 +0800, Yijing Wang wrote:
> +static u64 pci_device_serial_number(struct pci_bus *bus, int devfn)
> +{
> + int pos;
> + u32 lo, hi;
> +
> + if (!pci_bus_find_capability(bus, devfn, PCI_CAP_ID_EXP))
> + return 0;
> +
> + pos = pci_bus_find_ext_capability(bus, devfn,
> PCI_EXT_CAP_ID_DSN);
> + if (!pos)
> + return 0;
> +
> + pci_bus_read_config_dword(bus, devfn, pos + 4, &lo);
> + pci_bus_read_config_dword(bus, devfn, pos + 8, &hi);
We have no macro for that?
> + return ((u64)hi << 32) | lo;
> +}
Regards
Oliver
next prev parent reply other threads:[~2014-02-10 10:22 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-10 4:04 [PATCH part1 v5 0/7] Introduce PCIe Device Serial Number capability support Yijing Wang
2014-02-10 4:04 ` [PATCH part1 v5 1/7] PCI: rework pci_find_next_ext_capability() Yijing Wang
2014-02-10 4:04 ` [PATCH part1 v5 2/7] PCI: introduce pci_bus_find_ext_capability() Yijing Wang
2014-02-10 4:04 ` [PATCH part1 v5 3/7] PCI: Add support for Device Serial Number capability Yijing Wang
2014-02-10 10:21 ` Oliver Neukum [this message]
2014-02-11 1:55 ` Yijing Wang
2014-02-10 4:04 ` [PATCH part1 v5 4/7] PCI: Introduce pci_serial_number_changed() Yijing Wang
2014-02-10 4:04 ` [PATCH part1 v5 5/7] PCI: Add pci_dummy_ops to isolate pci device temporarily Yijing Wang
2014-02-10 6:56 ` Oliver Neukum
2014-02-10 7:59 ` Yijing Wang
2014-02-10 10:07 ` Oliver Neukum
2014-02-11 1:49 ` Yijing Wang
2014-02-10 4:04 ` [PATCH part1 v5 6/7] PCI: Check pci device serial number when scan device Yijing Wang
2014-02-10 4:04 ` [PATCH part1 v5 7/7] PCI: pciehp: Don't enable/disable slot on resume unless status changed Yijing Wang
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