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dfd8d581
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体验新版 GitCode,发现更多精彩内容 >>
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dfd8d581
编写于
11月 21, 2013
作者:
L
Laurence Evans
提交者:
Ben Hutchings
12月 12, 2013
浏览文件
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浏览文件
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电子邮件补丁
差异文件
sfc: Tidy up PTP synchronization code
Signed-off-by:
N
Ben Hutchings
<
bhutchings@solarflare.com
>
上级
94cd60d0
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
24 addition
and
20 deletion
+24
-20
drivers/net/ethernet/sfc/ptp.c
drivers/net/ethernet/sfc/ptp.c
+24
-20
未找到文件。
drivers/net/ethernet/sfc/ptp.c
浏览文件 @
dfd8d581
...
@@ -435,7 +435,6 @@ efx_ptp_process_times(struct efx_nic *efx, MCDI_DECLARE_STRUCT_PTR(synch_buf),
...
@@ -435,7 +435,6 @@ efx_ptp_process_times(struct efx_nic *efx, MCDI_DECLARE_STRUCT_PTR(synch_buf),
MCDI_VAR_ARRAY_LEN
(
response_length
,
MCDI_VAR_ARRAY_LEN
(
response_length
,
PTP_OUT_SYNCHRONIZE_TIMESET
);
PTP_OUT_SYNCHRONIZE_TIMESET
);
unsigned
i
;
unsigned
i
;
unsigned
total
;
unsigned
ngood
=
0
;
unsigned
ngood
=
0
;
unsigned
last_good
=
0
;
unsigned
last_good
=
0
;
struct
efx_ptp_data
*
ptp
=
efx
->
ptp_data
;
struct
efx_ptp_data
*
ptp
=
efx
->
ptp_data
;
...
@@ -446,33 +445,38 @@ efx_ptp_process_times(struct efx_nic *efx, MCDI_DECLARE_STRUCT_PTR(synch_buf),
...
@@ -446,33 +445,38 @@ efx_ptp_process_times(struct efx_nic *efx, MCDI_DECLARE_STRUCT_PTR(synch_buf),
if
(
number_readings
==
0
)
if
(
number_readings
==
0
)
return
-
EAGAIN
;
return
-
EAGAIN
;
/* Read the set of results and increment stats for any results that
/* Read the set of results and find the last good host-MC
* appera to be erroneous.
* synchronization result. The MC times when it finishes reading the
* host time so the corrected window time should be fairly constant
* for a given platform.
*/
*/
for
(
i
=
0
;
i
<
number_readings
;
i
++
)
{
for
(
i
=
0
;
i
<
number_readings
;
i
++
)
{
s32
window
,
corrected
;
efx_ptp_read_timeset
(
efx_ptp_read_timeset
(
MCDI_ARRAY_STRUCT_PTR
(
synch_buf
,
MCDI_ARRAY_STRUCT_PTR
(
synch_buf
,
PTP_OUT_SYNCHRONIZE_TIMESET
,
i
),
PTP_OUT_SYNCHRONIZE_TIMESET
,
i
),
&
ptp
->
timeset
[
i
]);
&
ptp
->
timeset
[
i
]);
}
/* Find the last good host-MC synchronization result. The MC times
window
=
ptp
->
timeset
[
i
].
window
;
* when it finishes reading the host time so the corrected window time
corrected
=
window
-
ptp
->
timeset
[
i
].
waitns
;
* should be fairly constant for a given platform.
*/
/* We expect the uncorrected synchronization window to be at
total
=
0
;
* least as large as the interval between host start and end
for
(
i
=
0
;
i
<
number_readings
;
i
++
)
* times. If it is smaller than this then this is mostly likely
if
(
ptp
->
timeset
[
i
].
window
>
ptp
->
timeset
[
i
].
waitns
)
{
* to be a consequence of the host's time being adjusted.
unsigned
win
;
* Check that the corrected sync window is in a reasonable
* range. If it is out of range it is likely to be because an
win
=
ptp
->
timeset
[
i
].
window
-
ptp
->
timeset
[
i
].
waitns
;
* interrupt or other delay occurred between reading the system
if
(
win
>=
MIN_SYNCHRONISATION_NS
&&
* time and writing it to MC memory.
win
<
MAX_SYNCHRONISATION_NS
)
{
*/
total
+=
ptp
->
timeset
[
i
].
window
;
if
(
window
>=
SYNCHRONISATION_GRANULARITY_NS
&&
ngood
++
;
corrected
<
MAX_SYNCHRONISATION_NS
&&
last_good
=
i
;
corrected
>=
MIN_SYNCHRONISATION_NS
)
{
}
ngood
++
;
last_good
=
i
;
}
}
}
if
(
ngood
==
0
)
{
if
(
ngood
==
0
)
{
netif_warn
(
efx
,
drv
,
efx
->
net_dev
,
netif_warn
(
efx
,
drv
,
efx
->
net_dev
,
...
...
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