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zynq: improve cache handling in nic_drv

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Clean and invalidate caches in nic_drv before/after triggering DMA.

Issue #3179
This commit is contained in:
Johannes Schlatow 2018-12-10 18:39:02 +01:00 committed by Christian Helmuth
parent 1d0a1e7937
commit c1caeb7e70
3 changed files with 28 additions and 3 deletions
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3
repos/os/include/nic/component.h
View File

@ -75,6 +75,9 @@ class Nic::Session_component : Communication_buffers, public Session_rpc_object
Genode::Signal_handler<Session_component> _packet_stream_dispatcher {
_ep, *this, &Session_component::_dispatch };
using Communication_buffers::_tx_ds;
using Communication_buffers::_rx_ds;
public:
/**

26
repos/os/src/drivers/nic/spec/gem/cadence_gem.h
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@ -28,6 +28,7 @@
#include "rx_buffer_descriptor.h"
#include "marvell_phy.h"
#include <kernel/interface.h>
namespace Genode
{
@ -339,10 +340,13 @@ namespace Genode
Genode::Signal_handler<Cadence_gem> _irq_handler;
Marvel_phy _phy;
addr_t _rx_buf_region;
addr_t _tx_buf_region;
size_t _rx_buf_size;
size_t _tx_buf_size;
void _init()
{
// TODO checksum offloading and pause frames
/* see 16.3.2 Configure the Controller */
/* 1. Program the Network Configuration register (gem.net_cfg) */
@ -482,6 +486,16 @@ namespace Genode
}
}
void _invalidate_rx_buffers()
{
Kernel::update_data_region(_rx_buf_region, _rx_buf_size);
}
void _clean_tx_buffers()
{
Kernel::update_data_region(_tx_buf_region, _tx_buf_size);
}
virtual void _handle_irq()
{
/* 16.3.9 Receiving Frames */
@ -489,6 +503,8 @@ namespace Genode
const Interrupt_status::access_t status = read<Interrupt_status>();
const Rx_status::access_t rxStatus = read<Rx_status>();
_invalidate_rx_buffers();
if ( Interrupt_status::Rx_complete::get(status) ) {
while (_rx_buffer.next_packet()) {
@ -589,7 +605,11 @@ namespace Genode
_rx_buffer(env, *_rx.source()),
_irq(env, irq),
_irq_handler(env.ep(), *this, &Cadence_gem::_handle_irq),
_phy(*this, _timer)
_phy(*this, _timer),
_rx_buf_region((addr_t)_tx_ds.local_addr<void>()),
_tx_buf_region((addr_t)_rx_ds.local_addr<void>()),
_rx_buf_size(_tx_ds.size()),
_tx_buf_size(_rx_ds.size())
{
_irq.sigh(_irq_handler);
_irq.ack_irq();
@ -686,6 +706,8 @@ namespace Genode
{
_handle_acks();
_clean_tx_buffers();
while (_send());
}
};

2
repos/os/src/drivers/nic/spec/gem/target.mk
View File

@ -1,5 +1,5 @@
REQUIRES = cadence_gem
TARGET = nic_drv
SRC_CC = main.cc
LIBS = base
LIBS = base syscall-hw
INC_DIR += $(PRG_DIR)