diff options
Diffstat (limited to 'core/pci.c')
| -rw-r--r-- | core/pci.c | 53 |
1 files changed, 53 insertions, 0 deletions
@@ -162,6 +162,7 @@ static struct pci_device *pci_scan_one(struct phb *phb, struct pci_device *paren } pd->bdfn = bdfn; pd->parent = parent; + list_head_init(&pd->pcrf); list_head_init(&pd->children); rc = pci_cfg_read8(phb, bdfn, PCI_CFG_HDR_TYPE, &htype); if (rc) { @@ -1593,3 +1594,55 @@ void pci_restore_bridge_buses(struct phb *phb) { pci_walk_dev(phb, __pci_restore_bridge_buses, NULL); } + +struct pci_cfg_reg_filter *pci_find_cfg_reg_filter(struct pci_device *pd, + uint32_t start, uint32_t len) +{ + struct pci_cfg_reg_filter *pcrf; + + /* Check on the cached range, which contains holes */ + if ((start + len) <= pd->pcrf_start || + pd->pcrf_end <= start) + return NULL; + + list_for_each(&pd->pcrf, pcrf, link) { + if (start >= pcrf->start && + (start + len) <= (pcrf->start + pcrf->len)) + return pcrf; + } + + return NULL; +} + +struct pci_cfg_reg_filter *pci_add_cfg_reg_filter(struct pci_device *pd, + uint32_t start, uint32_t len, + uint32_t flags, + pci_cfg_reg_func func) +{ + struct pci_cfg_reg_filter *pcrf; + + pcrf = pci_find_cfg_reg_filter(pd, start, len); + if (pcrf) + return pcrf; + + pcrf = zalloc(sizeof(*pcrf) + ((len + 0x4) & ~0x3)); + if (!pcrf) + return NULL; + + /* Don't validate the flags so that the private flags + * can be supported for debugging purpose. + */ + pcrf->flags = flags; + pcrf->start = start; + pcrf->len = len; + pcrf->func = func; + pcrf->data = (uint8_t *)(pcrf + 1); + + if (start < pd->pcrf_start) + pd->pcrf_start = start; + if (pd->pcrf_end < (start + len)) + pd->pcrf_end = start + len; + list_add_tail(&pd->pcrf, &pcrf->link); + + return pcrf; +} |
