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authorStefan Richter <stefanr@s5r6.in-berlin.de>2010-07-18 13:00:50 +0200
committerStefan Richter <stefanr@s5r6.in-berlin.de>2010-07-23 13:36:28 +0200
commitcc550216ae9a2993ef3973464714dc1a39ab1f86 (patch)
tree62ffde836c83fe44b7a9edc01d00bcb9ad4f4ad6 /drivers/firewire/core.h
parentbf54e1462b9192fdef7ea9e2bc44fdc16a4b87bc (diff)
downloadop-kernel-dev-cc550216ae9a2993ef3973464714dc1a39ab1f86.zip
op-kernel-dev-cc550216ae9a2993ef3973464714dc1a39ab1f86.tar.gz
firewire: cdev: add PHY pinging
This extends the FW_CDEV_IOC_SEND_PHY_PACKET ioctl() for /dev/fw* to be useful for ping time measurements. One application for it would be gap count optimization in userspace that is based on ping times rather than hop count. (The latter is implemented in firewire-core itself but is not applicable to beta PHYs that act as repeater.) Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/firewire/core.h')
-rw-r--r--drivers/firewire/core.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/firewire/core.h b/drivers/firewire/core.h
index 3102b6b..28621e4 100644
--- a/drivers/firewire/core.h
+++ b/drivers/firewire/core.h
@@ -234,4 +234,9 @@ void fw_fill_response(struct fw_packet *response, u32 *request_header,
void fw_send_phy_config(struct fw_card *card,
int node_id, int generation, int gap_count);
+static inline bool is_ping_packet(u32 *data)
+{
+ return (data[0] & 0xc0ffffff) == 0 && ~data[0] == data[1];
+}
+
#endif /* _FIREWIRE_CORE_H */
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