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