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>
52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
#ifndef DCA_H
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#define DCA_H
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/* DCA Provider API */
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/* DCA Notifier Interface */
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void dca_register_notify(struct notifier_block *nb);
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void dca_unregister_notify(struct notifier_block *nb);
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#define DCA_PROVIDER_ADD 0x0001
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#define DCA_PROVIDER_REMOVE 0x0002
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struct dca_provider {
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struct list_head node;
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struct dca_ops *ops;
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struct device *cd;
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int id;
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};
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struct dca_ops {
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int (*add_requester) (struct dca_provider *, struct device *);
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int (*remove_requester) (struct dca_provider *, struct device *);
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u8 (*get_tag) (struct dca_provider *, struct device *,
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int cpu);
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int (*dev_managed) (struct dca_provider *, struct device *);
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};
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struct dca_provider *alloc_dca_provider(struct dca_ops *ops, int priv_size);
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void free_dca_provider(struct dca_provider *dca);
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int register_dca_provider(struct dca_provider *dca, struct device *dev);
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void unregister_dca_provider(struct dca_provider *dca);
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static inline void *dca_priv(struct dca_provider *dca)
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{
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return (void *)dca + sizeof(struct dca_provider);
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}
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/* Requester API */
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#define DCA_GET_TAG_TWO_ARGS
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int dca_add_requester(struct device *dev);
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int dca_remove_requester(struct device *dev);
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u8 dca_get_tag(int cpu);
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u8 dca3_get_tag(struct device *dev, int cpu);
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/* internal stuff */
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int __init dca_sysfs_init(void);
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void __exit dca_sysfs_exit(void);
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int dca_sysfs_add_provider(struct dca_provider *dca, struct device *dev);
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void dca_sysfs_remove_provider(struct dca_provider *dca);
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int dca_sysfs_add_req(struct dca_provider *dca, struct device *dev, int slot);
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void dca_sysfs_remove_req(struct dca_provider *dca, int slot);
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#endif /* DCA_H */
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