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Date: Thu, 24 Sep 2020 12:01:55 -0700
From: Tom Rix <trix@...hat.com>
To: Xu Yilun <yilun.xu@...el.com>, mdf@...nel.org,
linux-fpga@...r.kernel.org, linux-kernel@...r.kernel.org,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: lgoncalv@...hat.com, hao.wu@...el.com
Subject: Re: [PATCH v3 1/5] fpga: dfl: rename the bus type "dfl" to "fpga-dfl"
On 9/24/20 9:59 AM, Xu Yilun wrote:
> Now the DFL device drivers could be made as independent modules and put
> in different subsystems according to their functionalities. So the name
> should be descriptive and unique in the whole kernel.
>
> The patch changes the naming of dfl bus related structures, functions,
> APIs and documentations.
This set is largely a mechanical change, it looks ok.
The big thing i would recommend giving some thought is
include/uabi/linux/fpga-dfl.h uses the prefix DFL_FPGA
this change uses fpga_dfl.
I do not think it matters where 'fpga' is in the internal names,
so for consistency with the external interface the prefix should dfl_fpga.
>
> Signed-off-by: Xu Yilun <yilun.xu@...el.com>
> ---
> Documentation/ABI/testing/sysfs-bus-dfl | 15 --
> Documentation/ABI/testing/sysfs-bus-fpga-dfl | 15 ++
> MAINTAINERS | 2 +-
> drivers/fpga/dfl.c | 254 ++++++++++++++-------------
> drivers/fpga/dfl.h | 77 ++++----
> 5 files changed, 184 insertions(+), 179 deletions(-)
> delete mode 100644 Documentation/ABI/testing/sysfs-bus-dfl
> create mode 100644 Documentation/ABI/testing/sysfs-bus-fpga-dfl
>
> diff --git a/Documentation/ABI/testing/sysfs-bus-dfl b/Documentation/ABI/testing/sysfs-bus-dfl
> deleted file mode 100644
> index 23543be..0000000
> --- a/Documentation/ABI/testing/sysfs-bus-dfl
> +++ /dev/null
> @@ -1,15 +0,0 @@
> -What: /sys/bus/dfl/devices/dfl_dev.X/type
> -Date: Aug 2020
> -KernelVersion: 5.10
> -Contact: Xu Yilun <yilun.xu@...el.com>
> -Description: Read-only. It returns type of DFL FIU of the device. Now DFL
> - supports 2 FIU types, 0 for FME, 1 for PORT.
> - Format: 0x%x
> -
> -What: /sys/bus/dfl/devices/dfl_dev.X/feature_id
> -Date: Aug 2020
> -KernelVersion: 5.10
> -Contact: Xu Yilun <yilun.xu@...el.com>
> -Description: Read-only. It returns feature identifier local to its DFL FIU
> - type.
> - Format: 0x%x
> diff --git a/Documentation/ABI/testing/sysfs-bus-fpga-dfl b/Documentation/ABI/testing/sysfs-bus-fpga-dfl
> new file mode 100644
> index 0000000..072decf
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-bus-fpga-dfl
> @@ -0,0 +1,15 @@
> +What: /sys/bus/fpga-dfl/devices/fpga_dfl_dev.X/type
> +Date: Aug 2020
> +KernelVersion: 5.10
> +Contact: Xu Yilun <yilun.xu@...el.com>
> +Description: Read-only. It returns type of FPGA DFL FIU of the device. Now
> + FPGA DFL supports 2 FIU types, 0 for FME, 1 for PORT.
> + Format: 0x%x
> +
> +What: /sys/bus/fpga-dfl/devices/fpga_dfl_dev.X/feature_id
fpga-dfl and fpga_dfl, the prefix needs to be consistent or..
sys/bus/fpga-dfl/ already has the fpga, dfl info and the second one is redundant so could be
/sys/bus/fpga-dfl/devices/dev.X/feature_id
re: mfd's comment.
This is a new, unreleased interface, now is the only we can change it, so lets do it now.
I'd even suggest splitting the patch to get the change into 5.10.
Tom
> +Date: Aug 2020
> +KernelVersion: 5.10
> +Contact: Xu Yilun <yilun.xu@...el.com>
> +Description: Read-only. It returns feature identifier local to its FPGA DFL
> + FIU type.
> + Format: 0x%x
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 0924930..48c0859 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -6839,7 +6839,7 @@ M: Wu Hao <hao.wu@...el.com>
> R: Tom Rix <trix@...hat.com>
> L: linux-fpga@...r.kernel.org
> S: Maintained
> -F: Documentation/ABI/testing/sysfs-bus-dfl
> +F: Documentation/ABI/testing/sysfs-bus-fpga-dfl
> F: Documentation/fpga/dfl.rst
> F: drivers/fpga/dfl*
> F: include/uapi/linux/fpga-dfl.h
> diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c
> index b450870..f146cda 100644
> --- a/drivers/fpga/dfl.c
> +++ b/drivers/fpga/dfl.c
> @@ -20,10 +20,10 @@ static DEFINE_MUTEX(dfl_id_mutex);
>
> /*
> * when adding a new feature dev support in DFL framework, it's required to
> - * add a new item in enum dfl_id_type and provide related information in below
> - * dfl_devs table which is indexed by dfl_id_type, e.g. name string used for
> - * platform device creation (define name strings in dfl.h, as they could be
> - * reused by platform device drivers).
> + * add a new item in enum fpga_dfl_id_type and provide related information in
> + * below dfl_devs table which is indexed by fpga_dfl_id_type, e.g. name string
> + * used for platform device creation (define name strings in dfl.h, as they
> + * could be reused by platform device drivers).
> *
> * if the new feature dev needs chardev support, then it's required to add
> * a new item in dfl_chardevs table and configure dfl_devs[i].devt_type as
> @@ -36,9 +36,9 @@ enum dfl_fpga_devt_type {
> DFL_FPGA_DEVT_MAX,
> };
>
> -static struct lock_class_key dfl_pdata_keys[DFL_ID_MAX];
> +static struct lock_class_key dfl_pdata_keys[FPGA_DFL_ID_MAX];
>
> -static const char *dfl_pdata_key_strings[DFL_ID_MAX] = {
> +static const char *dfl_pdata_key_strings[FPGA_DFL_ID_MAX] = {
> "dfl-fme-pdata",
> "dfl-port-pdata",
> };
> @@ -57,7 +57,7 @@ struct dfl_dev_info {
> enum dfl_fpga_devt_type devt_type;
> };
>
> -/* it is indexed by dfl_id_type */
> +/* it is indexed by fpga_dfl_id_type */
> static struct dfl_dev_info dfl_devs[] = {
> {.name = DFL_FPGA_FEATURE_DEV_FME, .dfh_id = DFH_ID_FIU_FME,
> .devt_type = DFL_FPGA_DEVT_FME},
> @@ -97,11 +97,11 @@ static void dfl_ids_destroy(void)
> idr_destroy(&dfl_devs[i].id);
> }
>
> -static int dfl_id_alloc(enum dfl_id_type type, struct device *dev)
> +static int dfl_id_alloc(enum fpga_dfl_id_type type, struct device *dev)
> {
> int id;
>
> - WARN_ON(type >= DFL_ID_MAX);
> + WARN_ON(type >= FPGA_DFL_ID_MAX);
> mutex_lock(&dfl_id_mutex);
> id = idr_alloc(&dfl_devs[type].id, dev, 0, 0, GFP_KERNEL);
> mutex_unlock(&dfl_id_mutex);
> @@ -109,15 +109,15 @@ static int dfl_id_alloc(enum dfl_id_type type, struct device *dev)
> return id;
> }
>
> -static void dfl_id_free(enum dfl_id_type type, int id)
> +static void dfl_id_free(enum fpga_dfl_id_type type, int id)
> {
> - WARN_ON(type >= DFL_ID_MAX);
> + WARN_ON(type >= FPGA_DFL_ID_MAX);
> mutex_lock(&dfl_id_mutex);
> idr_remove(&dfl_devs[type].id, id);
> mutex_unlock(&dfl_id_mutex);
> }
>
> -static enum dfl_id_type feature_dev_id_type(struct platform_device *pdev)
> +static enum fpga_dfl_id_type feature_dev_id_type(struct platform_device *pdev)
> {
> int i;
>
> @@ -125,10 +125,10 @@ static enum dfl_id_type feature_dev_id_type(struct platform_device *pdev)
> if (!strcmp(dfl_devs[i].name, pdev->name))
> return i;
>
> - return DFL_ID_MAX;
> + return FPGA_DFL_ID_MAX;
> }
>
> -static enum dfl_id_type dfh_id_to_type(u16 id)
> +static enum fpga_dfl_id_type dfh_id_to_type(u16 id)
> {
> int i;
>
> @@ -136,7 +136,7 @@ static enum dfl_id_type dfh_id_to_type(u16 id)
> if (dfl_devs[i].dfh_id == id)
> return i;
>
> - return DFL_ID_MAX;
> + return FPGA_DFL_ID_MAX;
> }
>
> /*
> @@ -244,28 +244,29 @@ int dfl_fpga_check_port_id(struct platform_device *pdev, void *pport_id)
> }
> EXPORT_SYMBOL_GPL(dfl_fpga_check_port_id);
>
> -static DEFINE_IDA(dfl_device_ida);
> +static DEFINE_IDA(fpga_dfl_device_ida);
>
> -static const struct dfl_device_id *
> -dfl_match_one_device(const struct dfl_device_id *id, struct dfl_device *ddev)
> +static const struct fpga_dfl_device_id *
> +dfl_match_one_device(const struct fpga_dfl_device_id *id,
> + struct fpga_dfl_device *fddev)
> {
> - if (id->type == ddev->type && id->feature_id == ddev->feature_id)
> + if (id->type == fddev->type && id->feature_id == fddev->feature_id)
> return id;
>
> return NULL;
> }
>
> -static int dfl_bus_match(struct device *dev, struct device_driver *drv)
> +static int fpga_dfl_bus_match(struct device *dev, struct device_driver *drv)
> {
> - struct dfl_device *ddev = to_dfl_dev(dev);
> - struct dfl_driver *ddrv = to_dfl_drv(drv);
> - const struct dfl_device_id *id_entry;
> + struct fpga_dfl_device *fddev = to_fpga_dfl_dev(dev);
> + struct fpga_dfl_driver *fddrv = to_fpga_dfl_drv(drv);
> + const struct fpga_dfl_device_id *id_entry;
>
> - id_entry = ddrv->id_table;
> + id_entry = fddrv->id_table;
> if (id_entry) {
> while (id_entry->feature_id) {
> - if (dfl_match_one_device(id_entry, ddev)) {
> - ddev->id_entry = id_entry;
> + if (dfl_match_one_device(id_entry, fddev)) {
> + fddev->id_entry = id_entry;
> return 1;
> }
> id_entry++;
> @@ -275,215 +276,216 @@ static int dfl_bus_match(struct device *dev, struct device_driver *drv)
> return 0;
> }
>
> -static int dfl_bus_probe(struct device *dev)
> +static int fpga_dfl_bus_probe(struct device *dev)
> {
> - struct dfl_driver *ddrv = to_dfl_drv(dev->driver);
> - struct dfl_device *ddev = to_dfl_dev(dev);
> + struct fpga_dfl_driver *fddrv = to_fpga_dfl_drv(dev->driver);
> + struct fpga_dfl_device *fddev = to_fpga_dfl_dev(dev);
>
> - return ddrv->probe(ddev);
> + return fddrv->probe(fddev);
> }
>
> -static int dfl_bus_remove(struct device *dev)
> +static int fpga_dfl_bus_remove(struct device *dev)
> {
> - struct dfl_driver *ddrv = to_dfl_drv(dev->driver);
> - struct dfl_device *ddev = to_dfl_dev(dev);
> + struct fpga_dfl_driver *fddrv = to_fpga_dfl_drv(dev->driver);
> + struct fpga_dfl_device *fddev = to_fpga_dfl_dev(dev);
>
> - if (ddrv->remove)
> - ddrv->remove(ddev);
> + if (fddrv->remove)
> + fddrv->remove(fddev);
>
> return 0;
> }
>
> -static int dfl_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
> +static int fpga_dfl_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
> {
> - struct dfl_device *ddev = to_dfl_dev(dev);
> + struct fpga_dfl_device *fddev = to_fpga_dfl_dev(dev);
>
> /* The type has 4 valid bits and feature_id has 12 valid bits */
> - return add_uevent_var(env, "MODALIAS=dfl:t%01Xf%03X",
> - ddev->type, ddev->feature_id);
> + return add_uevent_var(env, "MODALIAS=fpga-dfl:t%01Xf%03X",
> + fddev->type, fddev->feature_id);
> }
>
> static ssize_t
> type_show(struct device *dev, struct device_attribute *attr, char *buf)
> {
> - struct dfl_device *ddev = to_dfl_dev(dev);
> + struct fpga_dfl_device *fddev = to_fpga_dfl_dev(dev);
>
> - return sprintf(buf, "0x%x\n", ddev->type);
> + return sprintf(buf, "0x%x\n", fddev->type);
> }
> static DEVICE_ATTR_RO(type);
>
> static ssize_t
> feature_id_show(struct device *dev, struct device_attribute *attr, char *buf)
> {
> - struct dfl_device *ddev = to_dfl_dev(dev);
> + struct fpga_dfl_device *fddev = to_fpga_dfl_dev(dev);
>
> - return sprintf(buf, "0x%x\n", ddev->feature_id);
> + return sprintf(buf, "0x%x\n", fddev->feature_id);
> }
> static DEVICE_ATTR_RO(feature_id);
>
> -static struct attribute *dfl_dev_attrs[] = {
> +static struct attribute *fpga_dfl_dev_attrs[] = {
> &dev_attr_type.attr,
> &dev_attr_feature_id.attr,
> NULL,
> };
> -ATTRIBUTE_GROUPS(dfl_dev);
> -
> -static struct bus_type dfl_bus_type = {
> - .name = "dfl",
> - .match = dfl_bus_match,
> - .probe = dfl_bus_probe,
> - .remove = dfl_bus_remove,
> - .uevent = dfl_bus_uevent,
> - .dev_groups = dfl_dev_groups,
> +ATTRIBUTE_GROUPS(fpga_dfl_dev);
> +
> +static struct bus_type fpga_dfl_bus_type = {
> + .name = "fpga-dfl",
> + .match = fpga_dfl_bus_match,
> + .probe = fpga_dfl_bus_probe,
> + .remove = fpga_dfl_bus_remove,
> + .uevent = fpga_dfl_bus_uevent,
> + .dev_groups = fpga_dfl_dev_groups,
> };
>
> -static void release_dfl_dev(struct device *dev)
> +static void release_fpga_dfl_dev(struct device *dev)
> {
> - struct dfl_device *ddev = to_dfl_dev(dev);
> + struct fpga_dfl_device *fddev = to_fpga_dfl_dev(dev);
>
> - if (ddev->mmio_res.parent)
> - release_resource(&ddev->mmio_res);
> + if (fddev->mmio_res.parent)
> + release_resource(&fddev->mmio_res);
>
> - ida_simple_remove(&dfl_device_ida, ddev->id);
> - kfree(ddev->irqs);
> - kfree(ddev);
> + ida_simple_remove(&fpga_dfl_device_ida, fddev->id);
> + kfree(fddev->irqs);
> + kfree(fddev);
> }
>
> -static struct dfl_device *
> -dfl_dev_add(struct dfl_feature_platform_data *pdata,
> - struct dfl_feature *feature)
> +static struct fpga_dfl_device *
> +fpga_dfl_dev_add(struct dfl_feature_platform_data *pdata,
> + struct dfl_feature *feature)
> {
> struct platform_device *pdev = pdata->dev;
> struct resource *parent_res;
> - struct dfl_device *ddev;
> + struct fpga_dfl_device *fddev;
> int id, i, ret;
>
> - ddev = kzalloc(sizeof(*ddev), GFP_KERNEL);
> - if (!ddev)
> + fddev = kzalloc(sizeof(*fddev), GFP_KERNEL);
> + if (!fddev)
> return ERR_PTR(-ENOMEM);
>
> - id = ida_simple_get(&dfl_device_ida, 0, 0, GFP_KERNEL);
> + id = ida_simple_get(&fpga_dfl_device_ida, 0, 0, GFP_KERNEL);
> if (id < 0) {
> dev_err(&pdev->dev, "unable to get id\n");
> - kfree(ddev);
> + kfree(fddev);
> return ERR_PTR(id);
> }
>
> /* freeing resources by put_device() after device_initialize() */
> - device_initialize(&ddev->dev);
> - ddev->dev.parent = &pdev->dev;
> - ddev->dev.bus = &dfl_bus_type;
> - ddev->dev.release = release_dfl_dev;
> - ddev->id = id;
> - ret = dev_set_name(&ddev->dev, "dfl_dev.%d", id);
> + device_initialize(&fddev->dev);
> + fddev->dev.parent = &pdev->dev;
> + fddev->dev.bus = &fpga_dfl_bus_type;
> + fddev->dev.release = release_fpga_dfl_dev;
> + fddev->id = id;
> + ret = dev_set_name(&fddev->dev, "fpga_dfl_dev.%d", id);
> if (ret)
> goto put_dev;
>
> - ddev->type = feature_dev_id_type(pdev);
> - ddev->feature_id = feature->id;
> - ddev->cdev = pdata->dfl_cdev;
> + fddev->type = feature_dev_id_type(pdev);
> + fddev->feature_id = feature->id;
> + fddev->cdev = pdata->dfl_cdev;
>
> /* add mmio resource */
> parent_res = &pdev->resource[feature->resource_index];
> - ddev->mmio_res.flags = IORESOURCE_MEM;
> - ddev->mmio_res.start = parent_res->start;
> - ddev->mmio_res.end = parent_res->end;
> - ddev->mmio_res.name = dev_name(&ddev->dev);
> - ret = insert_resource(parent_res, &ddev->mmio_res);
> + fddev->mmio_res.flags = IORESOURCE_MEM;
> + fddev->mmio_res.start = parent_res->start;
> + fddev->mmio_res.end = parent_res->end;
> + fddev->mmio_res.name = dev_name(&fddev->dev);
> + ret = insert_resource(parent_res, &fddev->mmio_res);
> if (ret) {
> dev_err(&pdev->dev, "%s failed to claim resource: %pR\n",
> - dev_name(&ddev->dev), &ddev->mmio_res);
> + dev_name(&fddev->dev), &fddev->mmio_res);
> goto put_dev;
> }
>
> /* then add irq resource */
> if (feature->nr_irqs) {
> - ddev->irqs = kcalloc(feature->nr_irqs,
> - sizeof(*ddev->irqs), GFP_KERNEL);
> - if (!ddev->irqs) {
> + fddev->irqs = kcalloc(feature->nr_irqs,
> + sizeof(*fddev->irqs), GFP_KERNEL);
> + if (!fddev->irqs) {
> ret = -ENOMEM;
> goto put_dev;
> }
>
> for (i = 0; i < feature->nr_irqs; i++)
> - ddev->irqs[i] = feature->irq_ctx[i].irq;
> + fddev->irqs[i] = feature->irq_ctx[i].irq;
>
> - ddev->num_irqs = feature->nr_irqs;
> + fddev->num_irqs = feature->nr_irqs;
> }
>
> - ret = device_add(&ddev->dev);
> + ret = device_add(&fddev->dev);
> if (ret)
> goto put_dev;
>
> - dev_dbg(&pdev->dev, "add dfl_dev: %s\n", dev_name(&ddev->dev));
> - return ddev;
> + dev_dbg(&pdev->dev, "add fpga_dfl_dev: %s\n", dev_name(&fddev->dev));
> + return fddev;
>
> put_dev:
> - /* calls release_dfl_dev() which does the clean up */
> - put_device(&ddev->dev);
> + /* calls release_fpga_dfl_dev() which does the clean up */
> + put_device(&fddev->dev);
> return ERR_PTR(ret);
> }
>
> -static void dfl_devs_remove(struct dfl_feature_platform_data *pdata)
> +static void fpga_dfl_devs_remove(struct dfl_feature_platform_data *pdata)
> {
> struct dfl_feature *feature;
>
> dfl_fpga_dev_for_each_feature(pdata, feature) {
> - if (feature->ddev) {
> - device_unregister(&feature->ddev->dev);
> - feature->ddev = NULL;
> + if (feature->fddev) {
> + device_unregister(&feature->fddev->dev);
> + feature->fddev = NULL;
> }
> }
> }
>
> -static int dfl_devs_add(struct dfl_feature_platform_data *pdata)
> +static int fpga_dfl_devs_add(struct dfl_feature_platform_data *pdata)
> {
> + struct fpga_dfl_device *fddev;
> struct dfl_feature *feature;
> - struct dfl_device *ddev;
> int ret;
>
> dfl_fpga_dev_for_each_feature(pdata, feature) {
> if (feature->ioaddr)
> continue;
>
> - if (feature->ddev) {
> + if (feature->fddev) {
> ret = -EEXIST;
> goto err;
> }
>
> - ddev = dfl_dev_add(pdata, feature);
> - if (IS_ERR(ddev)) {
> - ret = PTR_ERR(ddev);
> + fddev = fpga_dfl_dev_add(pdata, feature);
> + if (IS_ERR(fddev)) {
> + ret = PTR_ERR(fddev);
> goto err;
> }
>
> - feature->ddev = ddev;
> + feature->fddev = fddev;
> }
>
> return 0;
>
> err:
> - dfl_devs_remove(pdata);
> + fpga_dfl_devs_remove(pdata);
> return ret;
> }
>
> -int __dfl_driver_register(struct dfl_driver *dfl_drv, struct module *owner)
> +int __fpga_dfl_driver_register(struct fpga_dfl_driver *fddrv,
> + struct module *owner)
> {
> - if (!dfl_drv || !dfl_drv->probe || !dfl_drv->id_table)
> + if (!fddrv || !fddrv->probe || !fddrv->id_table)
> return -EINVAL;
>
> - dfl_drv->drv.owner = owner;
> - dfl_drv->drv.bus = &dfl_bus_type;
> + fddrv->drv.owner = owner;
> + fddrv->drv.bus = &fpga_dfl_bus_type;
>
> - return driver_register(&dfl_drv->drv);
> + return driver_register(&fddrv->drv);
> }
> -EXPORT_SYMBOL(__dfl_driver_register);
> +EXPORT_SYMBOL(__fpga_dfl_driver_register);
>
> -void dfl_driver_unregister(struct dfl_driver *dfl_drv)
> +void fpga_dfl_driver_unregister(struct fpga_dfl_driver *fddrv)
> {
> - driver_unregister(&dfl_drv->drv);
> + driver_unregister(&fddrv->drv);
> }
> -EXPORT_SYMBOL(dfl_driver_unregister);
> +EXPORT_SYMBOL(fpga_dfl_driver_unregister);
>
> #define is_header_feature(feature) ((feature)->id == FEATURE_ID_FIU_HEADER)
>
> @@ -496,7 +498,7 @@ void dfl_fpga_dev_feature_uinit(struct platform_device *pdev)
> struct dfl_feature_platform_data *pdata = dev_get_platdata(&pdev->dev);
> struct dfl_feature *feature;
>
> - dfl_devs_remove(pdata);
> + fpga_dfl_devs_remove(pdata);
>
> dfl_fpga_dev_for_each_feature(pdata, feature) {
> if (feature->ops) {
> @@ -585,7 +587,7 @@ int dfl_fpga_dev_feature_init(struct platform_device *pdev,
> drv++;
> }
>
> - ret = dfl_devs_add(pdata);
> + ret = fpga_dfl_devs_add(pdata);
> if (ret)
> goto exit;
>
> @@ -745,11 +747,11 @@ static int build_info_commit_dev(struct build_feature_devs_info *binfo)
> struct platform_device *fdev = binfo->feature_dev;
> struct dfl_feature_platform_data *pdata;
> struct dfl_feature_info *finfo, *p;
> - enum dfl_id_type type;
> + enum fpga_dfl_id_type type;
> int ret, index = 0, res_idx = 0;
>
> type = feature_dev_id_type(fdev);
> - if (WARN_ON_ONCE(type >= DFL_ID_MAX))
> + if (WARN_ON_ONCE(type >= FPGA_DFL_ID_MAX))
> return -EINVAL;
>
> /*
> @@ -836,7 +838,7 @@ static int build_info_commit_dev(struct build_feature_devs_info *binfo)
>
> ret = platform_device_add(binfo->feature_dev);
> if (!ret) {
> - if (type == PORT_ID)
> + if (type == FPGA_DFL_PORT_ID)
> dfl_fpga_cdev_add_port_dev(binfo->cdev,
> binfo->feature_dev);
> else
> @@ -857,11 +859,11 @@ static int build_info_commit_dev(struct build_feature_devs_info *binfo)
>
> static int
> build_info_create_dev(struct build_feature_devs_info *binfo,
> - enum dfl_id_type type)
> + enum fpga_dfl_id_type type)
> {
> struct platform_device *fdev;
>
> - if (type >= DFL_ID_MAX)
> + if (type >= FPGA_DFL_ID_MAX)
> return -EINVAL;
>
> /*
> @@ -1072,7 +1074,7 @@ static int parse_feature_afu(struct build_feature_devs_info *binfo,
> }
>
> switch (feature_dev_id_type(binfo->feature_dev)) {
> - case PORT_ID:
> + case FPGA_DFL_PORT_ID:
> return parse_feature_port_afu(binfo, ofst);
> default:
> dev_info(binfo->dev, "AFU belonging to FIU %s is not supported yet.\n",
> @@ -1360,7 +1362,7 @@ EXPORT_SYMBOL_GPL(dfl_fpga_enum_info_add_irq);
> static int remove_feature_dev(struct device *dev, void *data)
> {
> struct platform_device *pdev = to_platform_device(dev);
> - enum dfl_id_type type = feature_dev_id_type(pdev);
> + enum fpga_dfl_id_type type = feature_dev_id_type(pdev);
> int id = pdev->id;
>
> platform_device_unregister(pdev);
> @@ -1526,7 +1528,7 @@ static int __init dfl_fpga_init(void)
> {
> int ret;
>
> - ret = bus_register(&dfl_bus_type);
> + ret = bus_register(&fpga_dfl_bus_type);
> if (ret)
> return ret;
>
> @@ -1535,7 +1537,7 @@ static int __init dfl_fpga_init(void)
> ret = dfl_chardev_init();
> if (ret) {
> dfl_ids_destroy();
> - bus_unregister(&dfl_bus_type);
> + bus_unregister(&fpga_dfl_bus_type);
> }
>
> return ret;
> @@ -1874,7 +1876,7 @@ static void __exit dfl_fpga_exit(void)
> {
> dfl_chardev_uinit();
> dfl_ids_destroy();
> - bus_unregister(&dfl_bus_type);
> + bus_unregister(&fpga_dfl_bus_type);
> }
>
> module_init(dfl_fpga_init);
> diff --git a/drivers/fpga/dfl.h b/drivers/fpga/dfl.h
> index 5dc758f..ba930a7 100644
> --- a/drivers/fpga/dfl.h
> +++ b/drivers/fpga/dfl.h
> @@ -236,7 +236,7 @@ struct dfl_feature_irq_ctx {
> * @irq_ctx: interrupt context list.
> * @nr_irqs: number of interrupt contexts.
> * @ops: ops of this sub feature.
> - * @ddev: ptr to the dfl device of this sub feature.
> + * @fddev: ptr to the fpga dfl device of this sub feature.
> * @priv: priv data of this feature.
> */
> struct dfl_feature {
> @@ -247,7 +247,7 @@ struct dfl_feature {
> struct dfl_feature_irq_ctx *irq_ctx;
> unsigned int nr_irqs;
> const struct dfl_feature_ops *ops;
> - struct dfl_device *ddev;
> + struct fpga_dfl_device *fddev;
> void *priv;
> };
>
> @@ -517,40 +517,42 @@ long dfl_feature_ioctl_set_irq(struct platform_device *pdev,
> unsigned long arg);
>
> /**
> - * enum dfl_id_type - define the DFL FIU types
> + * enum fpga_dfl_id_type - define the FPGA DFL FIU types
> */
> -enum dfl_id_type {
> - FME_ID,
> - PORT_ID,
> - DFL_ID_MAX,
> +enum fpga_dfl_id_type {
> + FPGA_DFL_FME_ID,
> + FPGA_DFL_PORT_ID,
> + FPGA_DFL_ID_MAX,
> };
>
> /**
> - * struct dfl_device_id - dfl device identifier
> - * @type: contains 4 bits DFL FIU type of the device. See enum dfl_id_type.
> - * @feature_id: contains 12 bits feature identifier local to its DFL FIU type.
> + * struct fpga_dfl_device_id - fpga dfl device identifier
> + * @type: contains 4 bits FPGA DFL FIU type of the device, see
> + * enum fpga_dfl_id_type.
> + * @feature_id: contains 12 bits feature identifier local to its FPGA DFL FIU
> + * type.
> * @driver_data: driver specific data.
> */
> -struct dfl_device_id {
> +struct fpga_dfl_device_id {
> u8 type;
> u16 feature_id;
> unsigned long driver_data;
> };
>
> /**
> - * struct dfl_device - represent an dfl device on dfl bus
> + * struct fpga_dfl_device - represent an fpga dfl device on fpga dfl bus
> *
> * @dev: generic device interface.
> - * @id: id of the dfl device.
> - * @type: type of DFL FIU of the device. See enum dfl_id_type.
> - * @feature_id: 16 bits feature identifier local to its DFL FIU type.
> - * @mmio_res: mmio resource of this dfl device.
> - * @irqs: list of Linux IRQ numbers of this dfl device.
> - * @num_irqs: number of IRQs supported by this dfl device.
> - * @cdev: pointer to DFL FPGA container device this dfl device belongs to.
> - * @id_entry: matched id entry in dfl driver's id table.
> + * @id: id of the fpga dfl device.
> + * @type: FPGA DFL FIU type of the device, see enum fpga_dfl_id_type.
> + * @feature_id: 16 bits feature identifier local to its FPGA DFL FIU type.
> + * @mmio_res: mmio resource of this fpga dfl device.
> + * @irqs: list of Linux IRQ numbers of this fpga dfl device.
> + * @num_irqs: number of IRQs supported by this fpga dfl device.
> + * @cdev: pointer to DFL FPGA container device this fpga dfl device belongs to.
> + * @id_entry: matched id entry in fpga dfl driver's id table.
> */
> -struct dfl_device {
> +struct fpga_dfl_device {
> struct device dev;
> int id;
> u8 type;
> @@ -559,11 +561,11 @@ struct dfl_device {
> int *irqs;
> unsigned int num_irqs;
> struct dfl_fpga_cdev *cdev;
> - const struct dfl_device_id *id_entry;
> + const struct fpga_dfl_device_id *id_entry;
> };
>
> /**
> - * struct dfl_driver - represent an dfl device driver
> + * struct fpga_dfl_driver - represent a fpga dfl device driver
> *
> * @drv: driver model structure.
> * @id_table: pointer to table of device IDs the driver is interested in.
> @@ -571,33 +573,34 @@ struct dfl_device {
> * @probe: mandatory callback for device binding.
> * @remove: callback for device unbinding.
> */
> -struct dfl_driver {
> +struct fpga_dfl_driver {
> struct device_driver drv;
> - const struct dfl_device_id *id_table;
> + const struct fpga_dfl_device_id *id_table;
>
> - int (*probe)(struct dfl_device *dfl_dev);
> - void (*remove)(struct dfl_device *dfl_dev);
> + int (*probe)(struct fpga_dfl_device *fddev);
> + void (*remove)(struct fpga_dfl_device *fddev);
> };
>
> -#define to_dfl_dev(d) container_of(d, struct dfl_device, dev)
> -#define to_dfl_drv(d) container_of(d, struct dfl_driver, drv)
> +#define to_fpga_dfl_dev(d) container_of(d, struct fpga_dfl_device, dev)
> +#define to_fpga_dfl_drv(d) container_of(d, struct fpga_dfl_driver, drv)
>
> /*
> * use a macro to avoid include chaining to get THIS_MODULE.
> */
> -#define dfl_driver_register(drv) \
> - __dfl_driver_register(drv, THIS_MODULE)
> -int __dfl_driver_register(struct dfl_driver *dfl_drv, struct module *owner);
> -void dfl_driver_unregister(struct dfl_driver *dfl_drv);
> +#define fpga_dfl_driver_register(drv) \
> + __fpga_dfl_driver_register(drv, THIS_MODULE)
> +int __fpga_dfl_driver_register(struct fpga_dfl_driver *fddrv,
> + struct module *owner);
> +void fpga_dfl_driver_unregister(struct fpga_dfl_driver *fddrv);
>
> /*
> - * module_dfl_driver() - Helper macro for drivers that don't do
> + * module_fpga_dfl_driver() - Helper macro for drivers that don't do
> * anything special in module init/exit. This eliminates a lot of
> * boilerplate. Each module may only use this macro once, and
> * calling it replaces module_init() and module_exit().
> */
> -#define module_dfl_driver(__dfl_driver) \
> - module_driver(__dfl_driver, dfl_driver_register, \
> - dfl_driver_unregister)
> +#define module_fpga_dfl_driver(__fpga_dfl_driver) \
> + module_driver(__fpga_dfl_driver, fpga_dfl_driver_register, \
> + fpga_dfl_driver_unregister)
>
> #endif /* __FPGA_DFL_H */
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