From: Alan Tull <atull@kernel.org>
To: Wu Hao <hao.wu@intel.com>
Cc: Moritz Fischer <mdf@kernel.org>,
linux-fpga@vger.kernel.org,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-api@vger.kernel.org, "Kang, Luwei" <luwei.kang@intel.com>,
"Zhang, Yi Z" <yi.z.zhang@intel.com>
Subject: Re: [PATCH v4 13/24] fpga: region: add compat_id support
Date: Wed, 28 Feb 2018 16:55:15 -0600 [thread overview]
Message-ID: <CANk1AXSMtbnQDAO+XgVEOLh_F13OJyB3LCEPAc6_-U7CXnkfNw@mail.gmail.com> (raw)
In-Reply-To: <1518513893-4719-14-git-send-email-hao.wu@intel.com>
On Tue, Feb 13, 2018 at 3:24 AM, Wu Hao <hao.wu@intel.com> wrote:
Hi Hao,
> This patch introduces a compat_id member and sysfs interface for each
> fpga-region, e.g userspace applications could read the compat_id
> from the sysfs interface for compatibility checking before PR.
>
> Signed-off-by: Wu Hao <hao.wu@intel.com>
> ---
> Documentation/ABI/testing/sysfs-class-fpga-region | 5 +++++
> drivers/fpga/fpga-region.c | 19 +++++++++++++++++++
> include/linux/fpga/fpga-region.h | 13 +++++++++++++
> 3 files changed, 37 insertions(+)
> create mode 100644 Documentation/ABI/testing/sysfs-class-fpga-region
>
> diff --git a/Documentation/ABI/testing/sysfs-class-fpga-region b/Documentation/ABI/testing/sysfs-class-fpga-region
> new file mode 100644
> index 0000000..419d930
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-class-fpga-region
> @@ -0,0 +1,5 @@
> +What: /sys/class/fpga_region/<region>/compat_id
> +Date: February 2018
> +KernelVersion: 4.16
> +Contact: Wu Hao <hao.wu@intel.com>
> +Description: FPGA region id for compatibility check.
> diff --git a/drivers/fpga/fpga-region.c b/drivers/fpga/fpga-region.c
> index 660a91b..babec96 100644
> --- a/drivers/fpga/fpga-region.c
> +++ b/drivers/fpga/fpga-region.c
> @@ -162,6 +162,24 @@ int fpga_region_program_fpga(struct fpga_region *region)
> }
> EXPORT_SYMBOL_GPL(fpga_region_program_fpga);
>
> +static ssize_t compat_id_show(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct fpga_region *region = to_fpga_region(dev);
This looks good, but not all users of FPGA are going to use compat_id.
How would you feel about making it a pointer in struct fpga_region?
With compat_id as a pointer, could check for non-null compat_id
pointer and return an error if it wasn't initialized.
> +
> + return sprintf(buf, "%016llx%016llx\n",
> + (unsigned long long)region->compat_id.id_h,
> + (unsigned long long)region->compat_id.id_l);
> +}
> +
> +static DEVICE_ATTR_RO(compat_id);
> +
> +static struct attribute *fpga_region_attrs[] = {
> + &dev_attr_compat_id.attr,
> + NULL,
> +};
> +ATTRIBUTE_GROUPS(fpga_region);
> +
> int fpga_region_register(struct fpga_region *region)
> {
> struct device *dev = region->parent;
> @@ -226,6 +244,7 @@ static int __init fpga_region_init(void)
> if (IS_ERR(fpga_region_class))
> return PTR_ERR(fpga_region_class);
>
> + fpga_region_class->dev_groups = fpga_region_groups;
> fpga_region_class->dev_release = fpga_region_dev_release;
>
> return 0;
> diff --git a/include/linux/fpga/fpga-region.h b/include/linux/fpga/fpga-region.h
> index 423c87e..bf97dcc 100644
> --- a/include/linux/fpga/fpga-region.h
> +++ b/include/linux/fpga/fpga-region.h
> @@ -6,6 +6,17 @@
> #include <linux/fpga/fpga-bridge.h>
>
> /**
> + * struct fpga_region_compat_id - FPGA Region id for compatibility check
> + *
> + * @id_h: high 64bit of the compat_id
> + * @id_l: low 64bit of the compat_id
> + */
> +struct fpga_region_compat_id {
> + u64 id_h;
> + u64 id_l;
I guess each user will choose how to define these bits.
> +};
> +
> +/**
> * struct fpga_region - FPGA Region structure
> * @dev: FPGA Region device
> * @parent: parent device
> @@ -13,6 +24,7 @@
> * @bridge_list: list of FPGA bridges specified in region
> * @mgr: FPGA manager
> * @info: FPGA image info
> + * @compat_id: FPGA region id for compatibility check.
> * @priv: private data
> * @get_bridges: optional function to get bridges to a list
> * @groups: optional attribute groups.
> @@ -24,6 +36,7 @@ struct fpga_region {
> struct list_head bridge_list;
> struct fpga_manager *mgr;
> struct fpga_image_info *info;
> + struct fpga_region_compat_id compat_id;
Here it would be a pointer instead.
Alan
> void *priv;
> int (*get_bridges)(struct fpga_region *region);
> const struct attribute_group **groups;
> --
> 2.7.4
>
next prev parent reply other threads:[~2018-02-28 22:55 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
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 [this message]
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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