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Diffstat (limited to 'drivers/fpga/dfl.h')
-rw-r--r--drivers/fpga/dfl.h82
1 files changed, 81 insertions, 1 deletions
diff --git a/drivers/fpga/dfl.h b/drivers/fpga/dfl.h
index b4f65250a29c..14d4731c13b0 100644
--- a/drivers/fpga/dfl.h
+++ b/drivers/fpga/dfl.h
@@ -132,6 +132,17 @@
#define PORT_CTRL_SFTRST_ACK BIT_ULL(4) /* HW ack for reset */
/**
+ * struct dfl_feature_driver - sub feature's driver
+ *
+ * @id: sub feature id.
+ * @ops: ops of this sub feature.
+ */
+struct dfl_feature_driver {
+ u64 id;
+ const struct dfl_feature_ops *ops;
+};
+
+/**
* struct dfl_feature - sub feature of the feature devices
*
* @id: sub feature id.
@@ -139,13 +150,17 @@
* this index is used to find its mmio resource from the
* feature dev (platform device)'s reources.
* @ioaddr: mapped mmio resource address.
+ * @ops: ops of this sub feature.
*/
struct dfl_feature {
u64 id;
int resource_index;
void __iomem *ioaddr;
+ const struct dfl_feature_ops *ops;
};
+#define DEV_STATUS_IN_USE 0
+
/**
* struct dfl_feature_platform_data - platform data for feature devices
*
@@ -156,6 +171,8 @@ struct dfl_feature {
* @dfl_cdev: ptr to container device.
* @disable_count: count for port disable.
* @num: number for sub features.
+ * @dev_status: dev status (e.g. DEV_STATUS_IN_USE).
+ * @private: ptr to feature dev private data.
* @features: sub features of this feature dev.
*/
struct dfl_feature_platform_data {
@@ -165,11 +182,49 @@ struct dfl_feature_platform_data {
struct platform_device *dev;
struct dfl_fpga_cdev *dfl_cdev;
unsigned int disable_count;
-
+ unsigned long dev_status;
+ void *private;
int num;
struct dfl_feature features[0];
};
+static inline
+int dfl_feature_dev_use_begin(struct dfl_feature_platform_data *pdata)
+{
+ /* Test and set IN_USE flags to ensure file is exclusively used */
+ if (test_and_set_bit_lock(DEV_STATUS_IN_USE, &pdata->dev_status))
+ return -EBUSY;
+
+ return 0;
+}
+
+static inline
+void dfl_feature_dev_use_end(struct dfl_feature_platform_data *pdata)
+{
+ clear_bit_unlock(DEV_STATUS_IN_USE, &pdata->dev_status);
+}
+
+static inline
+void dfl_fpga_pdata_set_private(struct dfl_feature_platform_data *pdata,
+ void *private)
+{
+ pdata->private = private;
+}
+
+static inline
+void *dfl_fpga_pdata_get_private(struct dfl_feature_platform_data *pdata)
+{
+ return pdata->private;
+}
+
+struct dfl_feature_ops {
+ int (*init)(struct platform_device *pdev, struct dfl_feature *feature);
+ void (*uinit)(struct platform_device *pdev,
+ struct dfl_feature *feature);
+ long (*ioctl)(struct platform_device *pdev, struct dfl_feature *feature,
+ unsigned int cmd, unsigned long arg);
+};
+
#define DFL_FPGA_FEATURE_DEV_FME "dfl-fme"
#define DFL_FPGA_FEATURE_DEV_PORT "dfl-port"
@@ -179,11 +234,25 @@ static inline int dfl_feature_platform_data_size(const int num)
num * sizeof(struct dfl_feature);
}
+void dfl_fpga_dev_feature_uinit(struct platform_device *pdev);
+int dfl_fpga_dev_feature_init(struct platform_device *pdev,
+ struct dfl_feature_driver *feature_drvs);
+
int dfl_fpga_dev_ops_register(struct platform_device *pdev,
const struct file_operations *fops,
struct module *owner);
void dfl_fpga_dev_ops_unregister(struct platform_device *pdev);
+static inline
+struct platform_device *dfl_fpga_inode_to_feature_dev(struct inode *inode)
+{
+ struct dfl_feature_platform_data *pdata;
+
+ pdata = container_of(inode->i_cdev, struct dfl_feature_platform_data,
+ cdev);
+ return pdata->dev;
+}
+
#define dfl_fpga_dev_for_each_feature(pdata, feature) \
for ((feature) = (pdata)->features; \
(feature) < (pdata)->features + (pdata)->num; (feature)++)
@@ -213,6 +282,17 @@ void __iomem *dfl_get_feature_ioaddr_by_id(struct device *dev, u64 id)
return NULL;
}
+static inline bool is_dfl_feature_present(struct device *dev, u64 id)
+{
+ return !!dfl_get_feature_ioaddr_by_id(dev, id);
+}
+
+static inline
+struct device *dfl_fpga_pdata_to_parent(struct dfl_feature_platform_data *pdata)
+{
+ return pdata->dev->dev.parent->parent;
+}
+
static inline bool dfl_feature_is_fme(void __iomem *base)
{
u64 v = readq(base + DFH);