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Kernel: Add interface to read link speed and duplex for NetworkAdapter

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Read the appropriate registers for RTL8139, RTL8168 and E1000.
For NE2000 just assume 10mbit full duplex as there is no indicator
for it in the pure NE2000 spec. Mock values for loopback.
This commit is contained in:
Thomas Wagenveld 2021-07-25 20:16:42 +02:00 • committed by Gunnar Beutner
parent 238ac8ac25
commit 59fdeec7f5
9 changed files with 98 additions and 0 deletions
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23
Kernel/Net/RTL8139NetworkAdapter.cpp
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@ -29,6 +29,7 @@ namespace Kernel {
#define REG_CONFIG1 0x52
#define REG_MSR 0x58
#define REG_BMCR 0x62
#define REG_ANLPAR 0x68
#define TX_STATUS_OWN 0x2000
#define TX_STATUS_THRESHOLD_MAX 0x3F0000
@ -84,12 +85,16 @@ namespace Kernel {
#define RXCFG_FTH_NONE 0xE000
#define MSR_LINKB 0x02
#define MSR_SPEED_10 0x08
#define MSR_RX_FLOW_CONTROL_ENABLE 0x40
#define BMCR_SPEED 0x2000
#define BMCR_AUTO_NEGOTIATE 0x1000
#define BMCR_DUPLEX 0x0100
#define ANLPAR_10FD 0x0040
#define ANLPAR_TXFD 0x0100
#define RX_MULTICAST 0x8000
#define RX_PHYSICAL_MATCH 0x4000
#define RX_BROADCAST 0x2000
@ -366,4 +371,22 @@ u32 RTL8139NetworkAdapter::in32(u16 address)
return m_io_base.offset(address).in<u32>();
}
bool RTL8139NetworkAdapter::link_full_duplex()
{
// Note: this code assumes auto-negotiation is enabled (which is now always the case) and
// bases the duplex state on the link partner advertisement.
// If non-auto-negotiation is ever implemented this should be changed.
u16 anlpar = in16(REG_ANLPAR);
return !!(anlpar & (ANLPAR_TXFD | ANLPAR_10FD));
}
i32 RTL8139NetworkAdapter::link_speed()
{
if (!link_up())
return NetworkAdapter::LINKSPEED_INVALID;
u16 msr = in16(REG_MSR);
return msr & MSR_SPEED_10 ? 10 : 100;
}
}