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authorMichael Ellerman <michael@ellerman.id.au>2006-11-22 18:26:18 +1100
committerGreg Kroah-Hartman <gregkh@suse.de>2006-12-20 10:54:42 -0800
commit687d5fe3dc33794efb500f42164a0588e2647914 (patch)
tree9d344d790ae2e9d6214c2b2941360e5c0ef97f7b /include/linux/pci.h
parentd3bac118fb27a365d5e9f54f4a078eb9b42f968f (diff)
downloadlwn-687d5fe3dc33794efb500f42164a0588e2647914.tar.gz
lwn-687d5fe3dc33794efb500f42164a0588e2647914.zip
PCI: Add pci_find_ht_capability() for finding Hypertransport capabilities
There are already several places in the kernel that want to search a PCI device for a given Hypertransport capability. Although this is possible using pci_find_capability() etc., it makes sense to encapsulate that logic in a helper - pci_find_ht_capability(). To cater for searching exhaustively for a capability, we also provide pci_find_next_ht_capability(). We also need to cater for the fact that the HT capability fields may be either 3 or 5 bits wide. pci_find_ht_capability() deals with this for you, but callers using the #defines directly must handle that themselves. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include/linux/pci.h')
-rw-r--r--include/linux/pci.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 769e132b78d3..b20ffb65300f 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -454,6 +454,8 @@ struct pci_dev *pci_find_slot (unsigned int bus, unsigned int devfn);
int pci_find_capability (struct pci_dev *dev, int cap);
int pci_find_next_capability (struct pci_dev *dev, u8 pos, int cap);
int pci_find_ext_capability (struct pci_dev *dev, int cap);
+int pci_find_ht_capability (struct pci_dev *dev, int ht_cap);
+int pci_find_next_ht_capability (struct pci_dev *dev, int pos, int ht_cap);
struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,