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dca: registering requesters in multiple dca domains

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This patch enables DCA support on multiple-IOH/multiple-IIO architectures.
It modifies dca module by replacing single dca_providers list
with dca_domains list, each domain containing separate list of providers.
This approach lets dca driver manage multiple domains, i.e. sets of providers
and requesters mapped back to the same PCI root complex device.
The driver takes care to register each requester to a provider
from the same domain.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
This commit is contained in:
Maciej Sosnowski
2009-09-10 15:05:58 +02:00
committed by Dan Williams
parent 9a8de639f3
commit 1a5aeeecd5
3 changed files with 119 additions and 14 deletions
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11
include/linux/dca.h
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@@ -20,6 +20,9 @@
*/
#ifndef DCA_H
#define DCA_H
#include <linux/pci.h>
/* DCA Provider API */
/* DCA Notifier Interface */
@@ -36,6 +39,12 @@ struct dca_provider {
int id;
};
struct dca_domain {
struct list_head node;
struct list_head dca_providers;
struct pci_bus *pci_rc;
};
struct dca_ops {
int (*add_requester) (struct dca_provider *, struct device *);
int (*remove_requester) (struct dca_provider *, struct device *);
@@ -47,7 +56,7 @@ struct dca_ops {
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);
void unregister_dca_provider(struct dca_provider *dca, struct device *dev);
static inline void *dca_priv(struct dca_provider *dca)
{