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Diff for /wikisrc/users/msaitoh/Comparison_of_implementations_of_Ethernet_drivers.mdwn between versions 1.4 and 1.7

version 1.4, 2015/02/05 05:13:21	version 1.7, 2016/01/25 07:50:15
Line 1	Line 1
<table class="center">	<table class="center">
<tr>	<tr>
<th>driver</th>	<th>driver</th>
<th>where dmemem is allocated in</th>	<th>where dmamem is allocated in</th>
<th>variations of mutex</th>	<th>variations of mutex</th>
<th>if_init lock</th>	<th>if_init lock</th>
<th>if_start lock</th>	<th>if_start lock</th>
Line 10	Line 10
<th>softint(9)based TX and RX?</th>	<th>softint(9)based TX and RX?</th>
<th>TX and TX are locked with mutex</th>	<th>TX and TX are locked with mutex</th>
<th>callout lock</th>	<th>callout lock</th>
	<th>MSI / MSI-X support</th>
	<th>Multi-queue support</th>
<th>notes</th>	<th>notes</th>
</tr>	</tr>
<tr>	<tr>
<th>wm(knakahara+ozaki-r)</th>	<th>wm</th>
<td>in attach()</td>	<td>in attach()</td>
<td>tx, rx, core</td>	<td>tx, rx, core</td>
<td>CORE_LOCK(spin mutex)</td>	<td>CORE_LOCK(spin mutex)</td>
Line 23	Line 25
<td>No</td>	<td>No</td>
<td>TX and RX differently</td>	<td>TX and RX differently</td>
<td>TX_LOCK(mutex) and check sc_stopping in the beginning</td>	<td>TX_LOCK(mutex) and check sc_stopping in the beginning</td>
	<td>Yes</td>
	<td>RX only</td>
<td></td>	<td></td>
</tr>	</tr>
<tr>	<tr>
Line 36	Line 40
<td>only RX is softint'ed</td>	<td>only RX is softint'ed</td>
<td>TX and RX differently</td>	<td>TX and RX differently</td>
<td>callout isn't used</td>	<td>callout isn't used</td>
	<td>Yes (MSI-X only)</td>
	<td>No</td>
<td></td>	<td></td>
</tr>	</tr>
<tr>	<tr>
Line 50	Line 56
<td></td>	<td></td>
<td></td>	<td></td>
<td></td>	<td></td>
	<td></td>
	<td></td>
</tr>	</tr>
<tr>	<tr>
<th>pq3etsec</th>	<th>pq3etsec</th>
Line 63	Line 71
<td>sc_hwlock is for hard interrput. sc_lock is for software interrupt. TX and RX use the same lock</td>	<td>sc_hwlock is for hard interrput. sc_lock is for software interrupt. TX and RX use the same lock</td>
<td>mutex_enter(sc_lock)</td>	<td>mutex_enter(sc_lock)</td>
<td></td>	<td></td>
	<td></td>
	<td></td>
</tr>	</tr>
<tr>	<tr>
<th>bcm53xx_eth</th>	<th>bcmeth(4)</th>
<td>in attach()</td>	<td>in attach()</td>
<td>lock, hwlock</td>	<td>lock, hwlock</td>
<td>not taken?</td>	<td>not taken?</td>
<td>not taken. Set flag with atomic_or_uint() and call softintr_schedule()</td>	<td>not taken. Set flag with atomic_or_uint() and call softintr_schedule()</td>
<td>not taken?</td>	<td>not taken?</td>
<td>splnet()</td>	<td>splnet()</td>
<td>Yes</td>	<td>Yes. The interrupt handler calls softint or workqueue depending on the load.</td>
<td>sc_hwlock is for hard interrput. sc_lock is for software interrupt. TX and RX use the same lock</td>	<td>sc_hwlock is for hard interrput. sc_lock is for software interrupt. TX and RX use the same lock</td>
<td>callout isn't used</td>	<td>callout isn't used</td>
<td></td>	<td></td>
	<td></td>
	<td></td>
</tr>	</tr>
<tr>	<tr>
<th>ixg</th>	<th>ixg</th>
Line 89	Line 101
<td>TX and RX differently</td>	<td>TX and RX differently</td>
<td>CORE_LOCK() in the beginning</td>	<td>CORE_LOCK() in the beginning</td>
<td></td>	<td></td>
	<td></td>
	<td></td>
</tr>	</tr>
<tr>	<tr>
<th>bnx</th>	<th>bnx</th>
Line 102	Line 116
<td>only TX uses mutex</td>	<td>only TX uses mutex</td>
<td>splnet() in the beginning</td>	<td>splnet() in the beginning</td>
<td></td>	<td></td>
	<td></td>
	<td></td>
</tr>	</tr>
<tr>	<tr>
<th>bge</th>	<th>bge</th>
Line 114	Line 130
<td>No</td>	<td>No</td>
<td>No</td>	<td>No</td>
<td>splnet() in the beginning</td>	<td>splnet() in the beginning</td>
	<td></td>
	<td></td>
<td>mutex is not used at all</td>	<td>mutex is not used at all</td>
</tr>	</tr>
</table>	</table>

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