mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-31 09:36:25 +00:00
7f1b358a23
This patch adds to ioatdma and dca modules support for Intel I/OAT DMA engine ver.3 (aka CB3 device). The main features of I/OAT ver.3 are: * 8 single channel DMA devices (8 channels total) * 8 DCA providers, each can accept 2 requesters * 8-bit TAG values and 32-bit extended APIC IDs Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
#ifndef DCA_H
|
|
#define DCA_H
|
|
/* DCA Provider API */
|
|
|
|
/* DCA Notifier Interface */
|
|
void dca_register_notify(struct notifier_block *nb);
|
|
void dca_unregister_notify(struct notifier_block *nb);
|
|
|
|
#define DCA_PROVIDER_ADD 0x0001
|
|
#define DCA_PROVIDER_REMOVE 0x0002
|
|
|
|
struct dca_provider {
|
|
struct list_head node;
|
|
struct dca_ops *ops;
|
|
struct device *cd;
|
|
int id;
|
|
};
|
|
|
|
struct dca_ops {
|
|
int (*add_requester) (struct dca_provider *, struct device *);
|
|
int (*remove_requester) (struct dca_provider *, struct device *);
|
|
u8 (*get_tag) (struct dca_provider *, struct device *,
|
|
int cpu);
|
|
int (*dev_managed) (struct dca_provider *, struct device *);
|
|
};
|
|
|
|
struct dca_provider *alloc_dca_provider(struct dca_ops *ops, int priv_size);
|
|
void free_dca_provider(struct dca_provider *dca);
|
|
int register_dca_provider(struct dca_provider *dca, struct device *dev);
|
|
void unregister_dca_provider(struct dca_provider *dca);
|
|
|
|
static inline void *dca_priv(struct dca_provider *dca)
|
|
{
|
|
return (void *)dca + sizeof(struct dca_provider);
|
|
}
|
|
|
|
/* Requester API */
|
|
#define DCA_GET_TAG_TWO_ARGS
|
|
int dca_add_requester(struct device *dev);
|
|
int dca_remove_requester(struct device *dev);
|
|
u8 dca_get_tag(int cpu);
|
|
u8 dca3_get_tag(struct device *dev, int cpu);
|
|
|
|
/* internal stuff */
|
|
int __init dca_sysfs_init(void);
|
|
void __exit dca_sysfs_exit(void);
|
|
int dca_sysfs_add_provider(struct dca_provider *dca, struct device *dev);
|
|
void dca_sysfs_remove_provider(struct dca_provider *dca);
|
|
int dca_sysfs_add_req(struct dca_provider *dca, struct device *dev, int slot);
|
|
void dca_sysfs_remove_req(struct dca_provider *dca, int slot);
|
|
|
|
#endif /* DCA_H */
|