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a081bd4af4
Devices sitting on proprietary busses have a device ID space that is owned by the respective bus and related firmware bindings. In order to let the generic OF layer handle the input translations to an IOMMU id, for such busses the current of_dma_configure() interface should be extended in order to allow the bus layer to provide the device input id parameter - that is retrieved/assigned in bus specific code and firmware. Augment of_dma_configure() to add an optional input_id parameter, leaving current functionality unchanged. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Rob Herring <robh@kernel.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Laurentiu Tudor <laurentiu.tudor@nxp.com> Link: https://lore.kernel.org/r/20200619082013.13661-8-lorenzo.pieralisi@arm.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
129 lines
3.3 KiB
C
129 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_OF_DEVICE_H
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#define _LINUX_OF_DEVICE_H
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#include <linux/cpu.h>
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#include <linux/platform_device.h>
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#include <linux/of_platform.h> /* temporary until merge */
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#include <linux/of.h>
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#include <linux/mod_devicetable.h>
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struct device;
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#ifdef CONFIG_OF
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extern const struct of_device_id *of_match_device(
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const struct of_device_id *matches, const struct device *dev);
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/**
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* of_driver_match_device - Tell if a driver's of_match_table matches a device.
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* @drv: the device_driver structure to test
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* @dev: the device structure to match against
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*/
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static inline int of_driver_match_device(struct device *dev,
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const struct device_driver *drv)
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{
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return of_match_device(drv->of_match_table, dev) != NULL;
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}
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extern struct platform_device *of_dev_get(struct platform_device *dev);
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extern void of_dev_put(struct platform_device *dev);
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extern int of_device_add(struct platform_device *pdev);
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extern int of_device_register(struct platform_device *ofdev);
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extern void of_device_unregister(struct platform_device *ofdev);
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extern const void *of_device_get_match_data(const struct device *dev);
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extern ssize_t of_device_modalias(struct device *dev, char *str, ssize_t len);
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extern int of_device_request_module(struct device *dev);
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extern void of_device_uevent(struct device *dev, struct kobj_uevent_env *env);
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extern int of_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env);
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static inline void of_device_node_put(struct device *dev)
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{
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of_node_put(dev->of_node);
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}
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static inline struct device_node *of_cpu_device_node_get(int cpu)
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{
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struct device *cpu_dev;
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cpu_dev = get_cpu_device(cpu);
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if (!cpu_dev)
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return of_get_cpu_node(cpu, NULL);
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return of_node_get(cpu_dev->of_node);
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}
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int of_dma_configure_id(struct device *dev,
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struct device_node *np,
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bool force_dma, const u32 *id);
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static inline int of_dma_configure(struct device *dev,
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struct device_node *np,
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bool force_dma)
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{
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return of_dma_configure_id(dev, np, force_dma, NULL);
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}
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#else /* CONFIG_OF */
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static inline int of_driver_match_device(struct device *dev,
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const struct device_driver *drv)
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{
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return 0;
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}
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static inline void of_device_uevent(struct device *dev,
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struct kobj_uevent_env *env) { }
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static inline const void *of_device_get_match_data(const struct device *dev)
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{
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return NULL;
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}
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static inline int of_device_modalias(struct device *dev,
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char *str, ssize_t len)
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{
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return -ENODEV;
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}
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static inline int of_device_request_module(struct device *dev)
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{
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return -ENODEV;
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}
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static inline int of_device_uevent_modalias(struct device *dev,
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struct kobj_uevent_env *env)
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{
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return -ENODEV;
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}
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static inline void of_device_node_put(struct device *dev) { }
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static inline const struct of_device_id *__of_match_device(
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const struct of_device_id *matches, const struct device *dev)
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{
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return NULL;
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}
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#define of_match_device(matches, dev) \
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__of_match_device(of_match_ptr(matches), (dev))
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static inline struct device_node *of_cpu_device_node_get(int cpu)
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{
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return NULL;
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}
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static inline int of_dma_configure_id(struct device *dev,
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struct device_node *np,
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bool force_dma)
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{
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return 0;
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}
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static inline int of_dma_configure(struct device *dev,
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struct device_node *np,
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bool force_dma)
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{
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return 0;
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}
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#endif /* CONFIG_OF */
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#endif /* _LINUX_OF_DEVICE_H */
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