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| author | Sasha Neftin <sasha.neftin@intel.com> | 2022-09-21 10:59:37 +0300 |
|---|---|---|
| committer | Tony Nguyen <anthony.l.nguyen@intel.com> | 2022-11-02 11:08:38 -0700 |
| commit | 7bab8828e1ec33e579a664c4262053e16e9cc936 (patch) | |
| tree | f7fcae29a94abdfceeeca32e39a145e1263f5cb3 /drivers/net/ethernet/intel/e1000e/netdev.c | |
| parent | 0c9183ce61bc5e546fc06d1f3237120778a81192 (diff) | |
| download | lwn-7bab8828e1ec33e579a664c4262053e16e9cc936.tar.gz lwn-7bab8828e1ec33e579a664c4262053e16e9cc936.zip | |
e1000e: Add e1000e trace module
Add tracepoints to the driver via a new file e1000e_trace.h and some new
trace calls added in interesting places in the driver. Add some tracing
for s0ix flows to help in a debug of shared resources with the CSME
firmware. The idea here is that tracepoints have such low performance cost
when disabled that we can leave these in the upstream driver.
Performance not affected, and this can be very useful for debugging and
adding new trace events to paths in the future.
Usage:
echo "e1000e_trace:*" > /sys/kernel/debug/tracing/set_event
echo 1 > /sys/kernel/debug/tracing/events/e1000e_trace/enable
Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Naama Meir <naamax.meir@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/e1000e/netdev.c')
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/netdev.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c index edc8aa9822ee..f0e015673f48 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -28,6 +28,8 @@ #include <linux/suspend.h> #include "e1000.h" +#define CREATE_TRACE_POINTS +#include "e1000e_trace.h" char e1000e_driver_name[] = "e1000e"; @@ -6351,6 +6353,7 @@ static void e1000e_s0ix_entry_flow(struct e1000_adapter *adapter) mac_data = er32(H2ME); mac_data |= E1000_H2ME_START_DPG; mac_data &= ~E1000_H2ME_EXIT_DPG; + trace_e1000e_trace_mac_register(mac_data); ew32(H2ME, mac_data); } else { /* Request driver configure the device to S0ix */ @@ -6505,6 +6508,7 @@ static void e1000e_s0ix_exit_flow(struct e1000_adapter *adapter) mac_data = er32(H2ME); mac_data &= ~E1000_H2ME_START_DPG; mac_data |= E1000_H2ME_EXIT_DPG; + trace_e1000e_trace_mac_register(mac_data); ew32(H2ME, mac_data); /* Poll up to 2.5 seconds for ME to unconfigure DPG. |