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E1000: Use a WaitQueue to sleep while waiting for a transmit IRQ

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This commit is contained in:
Andreas Kling 2019-12-14 10:47:17 +01:00
parent bcffe31d3a
commit 39246fb621
2 changed files with 12 additions and 2 deletions
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12
Kernel/Net/E1000NetworkAdapter.cpp
View file

@ -1,6 +1,7 @@
#include <Kernel/IO.h>
#include <Kernel/Net/E1000NetworkAdapter.h>
#include <Kernel/PCI.h>
#include <Kernel/Thread.h>
#define REG_CTRL 0x0000
#define REG_STATUS 0x0008
@ -167,6 +168,8 @@ void E1000NetworkAdapter::handle_irq()
if (status & 0x80) {
receive();
}
m_wait_queue.wake_all();
}
void E1000NetworkAdapter::detect_eeprom()
@ -321,6 +324,7 @@ u32 E1000NetworkAdapter::in32(u16 address)
void E1000NetworkAdapter::send_raw(const u8* data, int length)
{
disable_irq();
u32 tx_current = in32(REG_TXDESCTAIL);
#ifdef E1000_DEBUG
kprintf("E1000: Sending packet (%d bytes)\n", length);
@ -336,8 +340,12 @@ void E1000NetworkAdapter::send_raw(const u8* data, int length)
#endif
tx_current = (tx_current + 1) % number_of_tx_descriptors;
out32(REG_TXDESCTAIL, tx_current);
while (!descriptor.status)
;
enable_irq();
for (;;) {
if (descriptor.status)
break;
current->wait_on(m_wait_queue);
}
#ifdef E1000_DEBUG
kprintf("E1000: Sent packet, status is now %b!\n", descriptor.status);
#endif

2
Kernel/Net/E1000NetworkAdapter.h
View file

@ -72,4 +72,6 @@ private:
e1000_rx_desc* m_rx_descriptors;
e1000_tx_desc* m_tx_descriptors;
WaitQueue m_wait_queue;
};