EXPORT_SYMBOL_GPL(fpga_mgr_unlock);
/**
- * fpga_mgr_create - create and initialize an FPGA manager struct
+ * fpga_mgr_register_full - create and register an FPGA Manager device
* @parent: fpga manager device from pdev
- * @name: fpga manager name
- * @mops: pointer to structure of fpga manager ops
- * @priv: fpga manager private data
+ * @info: parameters for fpga manager
*
- * The caller of this function is responsible for freeing the struct with
- * fpga_mgr_free(). Using devm_fpga_mgr_create() instead is recommended.
+ * The caller of this function is responsible for calling fpga_mgr_unregister().
+ * Using devm_fpga_mgr_register_full() instead is recommended.
*
- * Return: pointer to struct fpga_manager or NULL
+ * Return: pointer to struct fpga_manager pointer or ERR_PTR()
*/
-struct fpga_manager *fpga_mgr_create(struct device *parent, const char *name,
- const struct fpga_manager_ops *mops,
- void *priv)
+struct fpga_manager *
+fpga_mgr_register_full(struct device *parent, const struct fpga_manager_info *info)
{
+ const struct fpga_manager_ops *mops = info->mops;
struct fpga_manager *mgr;
int id, ret;
if (!mops) {
dev_err(parent, "Attempt to register without fpga_manager_ops\n");
- return NULL;
+ return ERR_PTR(-EINVAL);
}
- if (!name || !strlen(name)) {
+ if (!info->name || !strlen(info->name)) {
dev_err(parent, "Attempt to register with no name!\n");
- return NULL;
+ return ERR_PTR(-EINVAL);
}
mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
if (!mgr)
- return NULL;
+ return ERR_PTR(-ENOMEM);
id = ida_simple_get(&fpga_mgr_ida, 0, 0, GFP_KERNEL);
- if (id < 0)
+ if (id < 0) {
+ ret = id;
goto error_kfree;
+ }
mutex_init(&mgr->ref_mutex);
- mgr->name = name;
- mgr->mops = mops;
- mgr->priv = priv;
+ mgr->name = info->name;
+ mgr->mops = info->mops;
+ mgr->priv = info->priv;
+ mgr->compat_id = info->compat_id;
- device_initialize(&mgr->dev);
mgr->dev.class = fpga_mgr_class;
mgr->dev.groups = mops->groups;
mgr->dev.parent = parent;
if (ret)
goto error_device;
+ /*
+ * Initialize framework state by requesting low level driver read state
+ * from device. FPGA may be in reset mode or may have been programmed
+ * by bootloader or EEPROM.
+ */
+ mgr->state = fpga_mgr_state(mgr);
+
+ ret = device_register(&mgr->dev);
+ if (ret) {
+ put_device(&mgr->dev);
+ return ERR_PTR(ret);
+ }
+
return mgr;
error_device:
error_kfree:
kfree(mgr);
- return NULL;
+ return ERR_PTR(ret);
}
-EXPORT_SYMBOL_GPL(fpga_mgr_create);
+EXPORT_SYMBOL_GPL(fpga_mgr_register_full);
/**
- * fpga_mgr_free - free an FPGA manager created with fpga_mgr_create()
- * @mgr: fpga manager struct
- */
-void fpga_mgr_free(struct fpga_manager *mgr)
-{
- ida_simple_remove(&fpga_mgr_ida, mgr->dev.id);
- kfree(mgr);
-}
-EXPORT_SYMBOL_GPL(fpga_mgr_free);
-
-static void devm_fpga_mgr_release(struct device *dev, void *res)
-{
- struct fpga_mgr_devres *dr = res;
-
- fpga_mgr_free(dr->mgr);
-}
-
-/**
- * devm_fpga_mgr_create - create and initialize a managed FPGA manager struct
+ * fpga_mgr_register - create and register an FPGA Manager device
* @parent: fpga manager device from pdev
* @name: fpga manager name
* @mops: pointer to structure of fpga manager ops
* @priv: fpga manager private data
*
- * This function is intended for use in an FPGA manager driver's probe function.
- * After the manager driver creates the manager struct with
- * devm_fpga_mgr_create(), it should register it with fpga_mgr_register(). The
- * manager driver's remove function should call fpga_mgr_unregister(). The
- * manager struct allocated with this function will be freed automatically on
- * driver detach. This includes the case of a probe function returning error
- * before calling fpga_mgr_register(), the struct will still get cleaned up.
+ * The caller of this function is responsible for calling fpga_mgr_unregister().
+ * Using devm_fpga_mgr_register() instead is recommended. This simple
+ * version of the register function should be sufficient for most users. The
+ * fpga_mgr_register_full() function is available for users that need to pass
+ * additional, optional parameters.
*
- * Return: pointer to struct fpga_manager or NULL
+ * Return: pointer to struct fpga_manager pointer or ERR_PTR()
*/
-struct fpga_manager *devm_fpga_mgr_create(struct device *parent, const char *name,
- const struct fpga_manager_ops *mops,
- void *priv)
+struct fpga_manager *
+fpga_mgr_register(struct device *parent, const char *name,
+ const struct fpga_manager_ops *mops, void *priv)
{
- struct fpga_mgr_devres *dr;
+ struct fpga_manager_info info = { 0 };
- dr = devres_alloc(devm_fpga_mgr_release, sizeof(*dr), GFP_KERNEL);
- if (!dr)
- return NULL;
+ info.name = name;
+ info.mops = mops;
+ info.priv = priv;
- dr->mgr = fpga_mgr_create(parent, name, mops, priv);
- if (!dr->mgr) {
- devres_free(dr);
- return NULL;
- }
-
- devres_add(parent, dr);
-
- return dr->mgr;
-}
-EXPORT_SYMBOL_GPL(devm_fpga_mgr_create);
-
-/**
- * fpga_mgr_register - register an FPGA manager
- * @mgr: fpga manager struct
- *
- * Return: 0 on success, negative error code otherwise.
- */
-int fpga_mgr_register(struct fpga_manager *mgr)
-{
- int ret;
-
- /*
- * Initialize framework state by requesting low level driver read state
- * from device. FPGA may be in reset mode or may have been programmed
- * by bootloader or EEPROM.
- */
- mgr->state = fpga_mgr_state(mgr);
-
- ret = device_add(&mgr->dev);
- if (ret)
- goto error_device;
-
- dev_info(&mgr->dev, "%s registered\n", mgr->name);
-
- return 0;
-
-error_device:
- ida_simple_remove(&fpga_mgr_ida, mgr->dev.id);
-
- return ret;
+ return fpga_mgr_register_full(parent, &info);
}
EXPORT_SYMBOL_GPL(fpga_mgr_register);
}
EXPORT_SYMBOL_GPL(fpga_mgr_unregister);
-static int fpga_mgr_devres_match(struct device *dev, void *res,
- void *match_data)
-{
- struct fpga_mgr_devres *dr = res;
-
- return match_data == dr->mgr;
-}
-
static void devm_fpga_mgr_unregister(struct device *dev, void *res)
{
struct fpga_mgr_devres *dr = res;
}
/**
- * devm_fpga_mgr_register - resource managed variant of fpga_mgr_register()
- * @dev: managing device for this FPGA manager
- * @mgr: fpga manager struct
+ * devm_fpga_mgr_register_full - resource managed variant of fpga_mgr_register()
+ * @parent: fpga manager device from pdev
+ * @info: parameters for fpga manager
*
- * This is the devres variant of fpga_mgr_register() for which the unregister
+ * This is the devres variant of fpga_mgr_register_full() for which the unregister
* function will be called automatically when the managing device is detached.
*/
-int devm_fpga_mgr_register(struct device *dev, struct fpga_manager *mgr)
+struct fpga_manager *
+devm_fpga_mgr_register_full(struct device *parent, const struct fpga_manager_info *info)
{
struct fpga_mgr_devres *dr;
- int ret;
-
- /*
- * Make sure that the struct fpga_manager * that is passed in is
- * managed itself.
- */
- if (WARN_ON(!devres_find(dev, devm_fpga_mgr_release,
- fpga_mgr_devres_match, mgr)))
- return -EINVAL;
+ struct fpga_manager *mgr;
dr = devres_alloc(devm_fpga_mgr_unregister, sizeof(*dr), GFP_KERNEL);
if (!dr)
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
- ret = fpga_mgr_register(mgr);
- if (ret) {
+ mgr = fpga_mgr_register_full(parent, info);
+ if (IS_ERR(mgr)) {
devres_free(dr);
- return ret;
+ return mgr;
}
dr->mgr = mgr;
- devres_add(dev, dr);
+ devres_add(parent, dr);
- return 0;
+ return mgr;
+}
+EXPORT_SYMBOL_GPL(devm_fpga_mgr_register_full);
+
+/**
+ * devm_fpga_mgr_register - resource managed variant of fpga_mgr_register()
+ * @parent: fpga manager device from pdev
+ * @name: fpga manager name
+ * @mops: pointer to structure of fpga manager ops
+ * @priv: fpga manager private data
+ *
+ * This is the devres variant of fpga_mgr_register() for which the
+ * unregister function will be called automatically when the managing
+ * device is detached.
+ */
+struct fpga_manager *
+devm_fpga_mgr_register(struct device *parent, const char *name,
+ const struct fpga_manager_ops *mops, void *priv)
+{
+ struct fpga_manager_info info = { 0 };
+
+ info.name = name;
+ info.mops = mops;
+ info.priv = priv;
+
+ return devm_fpga_mgr_register_full(parent, &info);
}
EXPORT_SYMBOL_GPL(devm_fpga_mgr_register);
static void fpga_mgr_dev_release(struct device *dev)
{
+ struct fpga_manager *mgr = to_fpga_manager(dev);
+
+ ida_simple_remove(&fpga_mgr_ida, mgr->dev.id);
+ kfree(mgr);
}
static int __init fpga_mgr_class_init(void)
projects / linux.git / blobdiff