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e1000e: Reduce boot time by tightening sleep ranges

소스 검색 
The e1000e driver is a great user of the usleep_range() API,
and has nice ranges that in principle help power management.

However the ranges that are used only during system startup are
very long (and can add easily 100 msec to the boot time) while
the power savings of such long ranges is irrelevant due to the
one-off, boot only, nature of these functions.

This patch shrinks some of the longest ranges to be shorter
(while still using a power friendly 1 msec range); this saves
100msec+ of boot time on my BDW NUCs

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Arjan van de Ven
2019-06-14 17:29:35 -07:00
committed by Jeff Kirsher
부모 af07adbb1c
커밋 ab6973aed6
7개의 변경된 파일과 28개의 추가작업 그리고 28개의 파일을 삭제
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14
drivers/net/ethernet/intel/e1000e/ethtool.c
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@@ -1014,7 +1014,7 @@ static int e1000_intr_test(struct e1000_adapter *adapter, u64 *data)
/* Disable all the interrupts */
ew32(IMC, 0xFFFFFFFF);
e1e_flush();
usleep_range(10000, 20000);
usleep_range(10000, 11000);
/* Test each interrupt */
for (i = 0; i < 10; i++) {
@@ -1046,7 +1046,7 @@ static int e1000_intr_test(struct e1000_adapter *adapter, u64 *data)
ew32(IMC, mask);
ew32(ICS, mask);
e1e_flush();
usleep_range(10000, 20000);
usleep_range(10000, 11000);
if (adapter->test_icr & mask) {
*data = 3;
@@ -1064,7 +1064,7 @@ static int e1000_intr_test(struct e1000_adapter *adapter, u64 *data)
ew32(IMS, mask);
ew32(ICS, mask);
e1e_flush();
usleep_range(10000, 20000);
usleep_range(10000, 11000);
if (!(adapter->test_icr & mask)) {
*data = 4;
@@ -1082,7 +1082,7 @@ static int e1000_intr_test(struct e1000_adapter *adapter, u64 *data)
ew32(IMC, ~mask & 0x00007FFF);
ew32(ICS, ~mask & 0x00007FFF);
e1e_flush();
usleep_range(10000, 20000);
usleep_range(10000, 11000);
if (adapter->test_icr) {
*data = 5;
@@ -1094,7 +1094,7 @@ static int e1000_intr_test(struct e1000_adapter *adapter, u64 *data)
/* Disable all the interrupts */
ew32(IMC, 0xFFFFFFFF);
e1e_flush();
usleep_range(10000, 20000);
usleep_range(10000, 11000);
/* Unhook test interrupt handler */
free_irq(irq, netdev);
@@ -1470,7 +1470,7 @@ static int e1000_set_82571_fiber_loopback(struct e1000_adapter *adapter)
*/
ew32(SCTL, E1000_SCTL_ENABLE_SERDES_LOOPBACK);
e1e_flush();
usleep_range(10000, 20000);
usleep_range(10000, 11000);
return 0;
}
@@ -1584,7 +1584,7 @@ static void e1000_loopback_cleanup(struct e1000_adapter *adapter)
hw->phy.media_type == e1000_media_type_internal_serdes) {
ew32(SCTL, E1000_SCTL_DISABLE_SERDES_LOOPBACK);
e1e_flush();
usleep_range(10000, 20000);
usleep_range(10000, 11000);
break;
}
/* Fall Through */