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I/OAT: I/OAT version 3.0 support

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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>
This commit is contained in:
Maciej Sosnowski 2008-07-22 17:30:57 -07:00 • committed by Dan Williams
parent 16a37acaaf
commit 7f1b358a23
10 changed files with 482 additions and 50 deletions
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7
include/linux/dca.h
View file

@ -10,6 +10,7 @@ void dca_unregister_notify(struct notifier_block *nb);
#define DCA_PROVIDER_REMOVE 0x0002
struct dca_provider {
struct list_head node;
struct dca_ops *ops;
struct device *cd;
int id;
@ -18,7 +19,9 @@ struct dca_provider {
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 *, int cpu);
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);
@ -32,9 +35,11 @@ static inline void *dca_priv(struct dca_provider *dca)
}
/* 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);