From: Moritz Fischer <mdf@kernel.org>
To: Wu Hao <hao.wu@intel.com>
Cc: atull@kernel.org, mdf@kernel.org, linux-fpga@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
luwei.kang@intel.com, yi.z.zhang@intel.com,
Tim Whisonant <tim.whisonant@intel.com>,
Enno Luebbers <enno.luebbers@intel.com>,
Shiva Rao <shiva.rao@intel.com>,
Christopher Rauer <christopher.rauer@intel.com>,
Xiao Guangrong <guangrong.xiao@linux.intel.com>
Subject: Re: [PATCH v4 06/24] fpga: dfl: adds fpga_cdev_find_port
Date: Wed, 14 Feb 2018 12:55:06 -0800 [thread overview]
Message-ID: <20180214205506.GA25618@tyrael.ni.corp.natinst.com> (raw)
In-Reply-To: <1518513893-4719-7-git-send-email-hao.wu@intel.com>
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Hi Hao,
On Tue, Feb 13, 2018 at 05:24:35PM +0800, Wu Hao wrote:
> For feature devices, we need a method to find the port dedicated
> to the device. This patch adds a function fpga_cdev_find_port
> for this purpose. e.g FPGA Management Engine (FME) Partial
> Reconfiguration sub feature, it uses this function to find
> dedicated port on the device for PR function implementation.
>
> Signed-off-by: Tim Whisonant <tim.whisonant@intel.com>
> Signed-off-by: Enno Luebbers <enno.luebbers@intel.com>
> Signed-off-by: Shiva Rao <shiva.rao@intel.com>
> Signed-off-by: Christopher Rauer <christopher.rauer@intel.com>
> Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
> Signed-off-by: Wu Hao <hao.wu@intel.com>
Acked-by: Moritz Fischer <mdf@kernel.org>
> ---
> v3: s/fpga_for_each_port/fpga_cdev_find_port/
> move fpga_cdev_find_port to fpga-dfl module.
> v4: improve description in commit message.
> add comments to remind user to put_device after use this function.
> ---
> drivers/fpga/dfl.c | 34 ++++++++++++++++++++++++++++++++++
> drivers/fpga/dfl.h | 20 ++++++++++++++++++++
> 2 files changed, 54 insertions(+)
>
> diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c
> index dcfe5ab..38dc819 100644
> --- a/drivers/fpga/dfl.c
> +++ b/drivers/fpga/dfl.c
> @@ -783,6 +783,40 @@ void fpga_remove_feature_devs(struct fpga_cdev *cdev)
> }
> EXPORT_SYMBOL_GPL(fpga_remove_feature_devs);
>
> +/**
> + * __fpga_cdev_find_port - find a port under given container device
> + *
> + * @cdev: container device
> + * @data: data passed to match function
> + * @match: match function used to find specific port from the port device list
> + *
> + * Find a port device under container device. This function needs to be
> + * invoked with lock held.
> + *
> + * This function returns NULL if the device doesn't match and non-zero if it
> + * does. If this function returns non-zero and a reference to the platform
> + * device of port can be obtained.
> + *
> + * NOTE: you will need to drop the device reference with put_device() after use.
> + */
> +struct platform_device *
> +__fpga_cdev_find_port(struct fpga_cdev *cdev, void *data,
> + int (*match)(struct platform_device *, void *))
> +{
> + struct feature_platform_data *pdata;
> + struct platform_device *port_dev;
> +
> + list_for_each_entry(pdata, &cdev->port_dev_list, node) {
> + port_dev = pdata->dev;
> +
> + if (match(port_dev, data) && get_device(&port_dev->dev))
> + return port_dev;
> + }
> +
> + return NULL;
> +}
> +EXPORT_SYMBOL_GPL(__fpga_cdev_find_port);
> +
> int fpga_port_id(struct platform_device *pdev)
> {
> void __iomem *base = get_feature_ioaddr_by_id(&pdev->dev,
> diff --git a/drivers/fpga/dfl.h b/drivers/fpga/dfl.h
> index 9b19399..d6ecda1 100644
> --- a/drivers/fpga/dfl.h
> +++ b/drivers/fpga/dfl.h
> @@ -356,4 +356,24 @@ struct fpga_cdev {
> struct fpga_cdev *fpga_enumerate_feature_devs(struct fpga_enum_info *info);
> void fpga_remove_feature_devs(struct fpga_cdev *cdev);
>
> +/*
> + * need to drop the device reference with put_device() after use port platform
> + * device returned by __fpga_cdev_find_port and fpga_cdev_find_port functions.
> + */
> +struct platform_device *
> +__fpga_cdev_find_port(struct fpga_cdev *cdev, void *data,
> + int (*match)(struct platform_device *, void *));
> +
> +static inline struct platform_device *
> +fpga_cdev_find_port(struct fpga_cdev *cdev, void *data,
> + int (*match)(struct platform_device *, void *))
> +{
> + struct platform_device *pdev;
> +
> + mutex_lock(&cdev->lock);
> + pdev = __fpga_cdev_find_port(cdev, data, match);
> + mutex_unlock(&cdev->lock);
> +
> + return pdev;
> +}
> #endif /* __FPGA_DFL_H */
> --
> 2.7.4
>
Thanks,
Moritz
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next prev parent reply other threads:[~2018-02-14 21:00 UTC|newest]
Thread overview: 93+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-13 9:24 [PATCH v4 00/24] FPGA Device Feature List (DFL) Device Drivers Wu Hao
2018-02-13 9:24 ` [PATCH v4 01/24] docs: fpga: add a document for FPGA Device Feature List (DFL) Framework Overview Wu Hao
2018-02-26 22:48 ` Alan Tull
2018-02-27 2:12 ` Wu Hao
2018-02-13 9:24 ` [PATCH v4 02/24] fpga: mgr: add region_id to fpga_image_info Wu Hao
2018-02-13 9:24 ` [PATCH v4 03/24] fpga: mgr: add status for fpga-manager Wu Hao
2018-02-14 15:55 ` Alan Tull
2018-02-15 9:42 ` Wu, Hao
2018-02-14 20:55 ` Moritz Fischer
2018-02-13 9:24 ` [PATCH v4 04/24] fpga: add device feature list support Wu Hao
2018-03-21 23:54 ` Alan Tull
2018-03-22 4:40 ` Wu Hao
2018-03-22 21:31 ` Alan Tull
2018-03-23 4:33 ` Wu Hao
2018-03-26 17:21 ` Alan Tull
2018-03-27 2:35 ` Wu Hao
2018-03-29 21:57 ` Alan Tull
2018-04-02 4:22 ` Wu Hao
2018-04-02 19:06 ` Alan Tull
2018-04-03 1:36 ` Wu Hao
2018-04-04 20:06 ` Alan Tull
2018-04-06 11:01 ` Wu Hao
2018-02-13 9:24 ` [PATCH v4 05/24] fpga: dfl: add chardev support for feature devices Wu Hao
2018-02-13 9:24 ` [PATCH v4 06/24] fpga: dfl: adds fpga_cdev_find_port Wu Hao
2018-02-14 16:24 ` Alan Tull
2018-02-15 9:46 ` Wu, Hao
2018-02-14 20:55 ` Moritz Fischer [this message]
2018-02-13 9:24 ` [PATCH v4 07/24] fpga: dfl: add feature device infrastructure Wu Hao
2018-02-14 21:03 ` Moritz Fischer
2018-02-14 21:13 ` Alan Tull
2018-02-15 10:05 ` Wu, Hao
2018-02-15 19:49 ` Moritz Fischer
2018-02-18 2:15 ` Wu, Hao
2018-02-13 9:24 ` [PATCH v4 08/24] fpga: add FPGA DFL PCIe device driver Wu Hao
2018-03-13 16:05 ` Alan Tull
2018-03-15 18:49 ` Moritz Fischer
2018-03-16 4:29 ` Wu Hao
2018-02-13 9:24 ` [PATCH v4 09/24] fpga: dfl-pci: add enumeration for feature devices Wu Hao
2018-03-13 18:30 ` Alan Tull
2018-03-14 5:21 ` Wu Hao
2018-03-14 14:48 ` Alan Tull
2018-02-13 9:24 ` [PATCH v4 10/24] fpga: dfl: add FPGA Management Engine driver basic framework Wu Hao
2018-04-05 18:35 ` Alan Tull
2018-04-06 11:04 ` Wu Hao
2018-02-13 9:24 ` [PATCH v4 11/24] fpga: dfl: fme: add header sub feature support Wu Hao
2018-02-14 16:36 ` Alan Tull
2018-02-13 9:24 ` [PATCH v4 12/24] fpga: dfl: fme: add FPGA_GET_API_VERSION/CHECK_EXTENSION ioctls support Wu Hao
2018-03-19 18:29 ` Alan Tull
2018-03-20 6:46 ` Wu Hao
2018-02-13 9:24 ` [PATCH v4 13/24] fpga: region: add compat_id support Wu Hao
2018-02-28 22:55 ` Alan Tull
2018-03-01 6:17 ` Wu Hao
2018-03-05 19:42 ` Alan Tull
2018-03-06 0:56 ` Wu Hao
2018-02-13 9:24 ` [PATCH v4 14/24] fpga: dfl: fme: add partial reconfiguration sub feature support Wu Hao
2018-03-05 22:46 ` Alan Tull
2018-03-06 2:08 ` Wu Hao
2018-03-06 18:29 ` Alan Tull
2018-03-07 4:39 ` Wu Hao
2018-03-11 20:09 ` matthew.gerlach
2018-03-12 4:29 ` Wu Hao
2018-03-12 18:53 ` Alan Tull
2018-03-12 21:36 ` matthew.gerlach
2018-03-13 1:07 ` Wu Hao
2018-02-13 9:24 ` [PATCH v4 15/24] fpga: dfl-fme-pr: add compat_id support for dfl-fme-region platform device Wu Hao
2018-02-28 23:06 ` Alan Tull
2018-03-01 5:49 ` Wu Hao
2018-03-01 15:59 ` Alan Tull
2018-03-01 15:55 ` Wu Hao
2018-02-13 9:24 ` [PATCH v4 16/24] fpga: dfl: add fpga manager platform driver for FME Wu Hao
2018-03-20 20:32 ` Alan Tull
2018-03-21 2:50 ` Wu Hao
2018-03-21 16:55 ` Moritz Fischer
2018-03-22 6:07 ` Wu Hao
2018-04-05 18:45 ` Alan Tull
2018-04-06 11:11 ` Wu Hao
2018-02-13 9:24 ` [PATCH v4 17/24] fpga: dfl: add fpga bridge " Wu Hao
2018-02-13 9:24 ` [PATCH v4 18/24] fpga: dfl: add fpga region " Wu Hao
2018-02-13 9:24 ` [PATCH v4 19/24] fpga: dfl-fme-region: add compat_id support Wu Hao
2018-02-13 9:24 ` [PATCH v4 20/24] fpga: dfl: add FPGA Accelerated Function Unit driver basic framework Wu Hao
2018-03-19 18:40 ` Alan Tull
2018-04-05 18:26 ` Alan Tull
2018-04-06 11:05 ` Wu Hao
2018-02-13 9:24 ` [PATCH v4 21/24] fpga: dfl: afu: add header sub feature support Wu Hao
2018-02-13 9:24 ` [PATCH v4 22/24] fpga: dfl: afu: add FPGA_GET_API_VERSION/CHECK_EXTENSION ioctls support Wu Hao
2018-02-13 9:24 ` [PATCH v4 23/24] fpga: dfl: afu: add user afu sub feature support Wu Hao
2018-03-19 20:10 ` Alan Tull
2018-03-20 7:10 ` Wu Hao
2018-03-20 18:17 ` Alan Tull
2018-03-21 3:00 ` Wu Hao
2018-03-21 23:50 ` Alan Tull
2018-03-22 4:41 ` Wu Hao
2018-02-13 9:24 ` [PATCH v4 24/24] fpga: dfl: afu: add FPGA_PORT_DMA_MAP/UNMAP ioctls support Wu Hao
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