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/*
* PCI Backend - Handles the virtual fields found on the capability lists
* in the configuration space.
*
* Author: Ryan Wilson <hap9@epoch.ncsc.mil>
*/
#include <linux/kernel.h>
#include <linux/pci.h>
#include "pciback.h"
#include "conf_space.h"
#include "conf_space_capability.h"
static LIST_HEAD(capabilities);
static const struct config_field caplist_header[] = {
{
.offset = PCI_CAP_LIST_ID,
.size = 2, /* encompass PCI_CAP_LIST_ID & PCI_CAP_LIST_NEXT */
.u.w.read = pciback_read_config_word,
.u.w.write = NULL,
},
{}
};
static inline void register_capability(struct pciback_config_capability *cap)
{
list_add_tail(&cap->cap_list, &capabilities);
}
int pciback_config_capability_add_fields(struct pci_dev *dev)
{
int err = 0;
struct pciback_config_capability *cap;
int cap_offset;
list_for_each_entry(cap, &capabilities, cap_list) {
cap_offset = pci_find_capability(dev, cap->capability);
if (cap_offset) {
dev_dbg(&dev->dev, "Found capability 0x%x at 0x%x\n",
cap->capability, cap_offset);
err = pciback_config_add_fields_offset(dev,
caplist_header,
cap_offset);
if (err)
goto out;
err = pciback_config_add_fields_offset(dev,
cap->fields,
cap_offset);
if (err)
goto out;
}
}
out:
return err;
}
int pciback_config_capability_init(void)
{
register_capability(&pciback_config_capability_vpd);
register_capability(&pciback_config_capability_pm);
return 0;
}
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