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author | Xiao Guangrong <guangrong.xiao@linux.intel.com> | 2018-06-30 02:53:16 +0200 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-15 13:55:45 +0200 |
commit | 5b57d02a2f94bb04c6b36932412f7f3b1bb38518 (patch) | |
tree | 3065909e12962864351492bb6beb2b03a55cc3e2 /drivers/fpga/dfl.c | |
parent | fpga: dfl: add dfl_fpga_cdev_find_port (diff) | |
download | linux-5b57d02a2f94bb04c6b36932412f7f3b1bb38518.tar.xz linux-5b57d02a2f94bb04c6b36932412f7f3b1bb38518.zip |
fpga: dfl: add feature device infrastructure
This patch abstracts the common operations of the sub features and defines
the feature_ops data structure, including init, uinit and ioctl function
pointers. And this patch adds some common helper functions for FME and AFU
drivers, e.g. dfl_feature_dev_use_begin/end which are used to ensure
exclusive usage of the feature device file.
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: Kang Luwei <luwei.kang@intel.com>
Signed-off-by: Zhang Yi <yi.z.zhang@intel.com>
Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Wu Hao <hao.wu@intel.com>
Acked-by: Alan Tull <atull@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/fpga/dfl.c')
-rw-r--r-- | drivers/fpga/dfl.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c index 68e0b45617b2..e2c72c5dd9e6 100644 --- a/drivers/fpga/dfl.c +++ b/drivers/fpga/dfl.c @@ -136,6 +136,77 @@ static enum dfl_id_type dfh_id_to_type(u32 id) return DFL_ID_MAX; } +/** + * dfl_fpga_dev_feature_uinit - uinit for sub features of dfl feature device + * @pdev: feature device. + */ +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_fpga_dev_for_each_feature(pdata, feature) + if (feature->ops) { + feature->ops->uinit(pdev, feature); + feature->ops = NULL; + } +} +EXPORT_SYMBOL_GPL(dfl_fpga_dev_feature_uinit); + +static int dfl_feature_instance_init(struct platform_device *pdev, + struct dfl_feature_platform_data *pdata, + struct dfl_feature *feature, + struct dfl_feature_driver *drv) +{ + int ret; + + ret = drv->ops->init(pdev, feature); + if (ret) + return ret; + + feature->ops = drv->ops; + + return ret; +} + +/** + * dfl_fpga_dev_feature_init - init for sub features of dfl feature device + * @pdev: feature device. + * @feature_drvs: drvs for sub features. + * + * This function will match sub features with given feature drvs list and + * use matched drv to init related sub feature. + * + * Return: 0 on success, negative error code otherwise. + */ +int dfl_fpga_dev_feature_init(struct platform_device *pdev, + struct dfl_feature_driver *feature_drvs) +{ + struct dfl_feature_platform_data *pdata = dev_get_platdata(&pdev->dev); + struct dfl_feature_driver *drv = feature_drvs; + struct dfl_feature *feature; + int ret; + + while (drv->ops) { + dfl_fpga_dev_for_each_feature(pdata, feature) { + /* match feature and drv using id */ + if (feature->id == drv->id) { + ret = dfl_feature_instance_init(pdev, pdata, + feature, drv); + if (ret) + goto exit; + } + } + drv++; + } + + return 0; +exit: + dfl_fpga_dev_feature_uinit(pdev); + return ret; +} +EXPORT_SYMBOL_GPL(dfl_fpga_dev_feature_init); + static void dfl_chardev_uinit(void) { int i; |