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PDEC evil fix
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This commit is contained in:
Robin Müller 2023-02-08 20:01:56 +01:00
parent f7e59edaf2
commit 557fe5a9a2
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GPG Key ID: 11D4952C8CCEF814
3 changed files with 20 additions and 8 deletions
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23
linux/ipcore/PdecHandler.cpp
View File

@ -132,6 +132,7 @@ ReturnValue_t PdecHandler::polledOperation() {
return returnvalue::OK;
}
// See https://yurovsky.github.io/2014/10/10/linux-uio-gpio-interrupt.html for more information.
ReturnValue_t PdecHandler::irqOperation() {
ReturnValue_t result = returnvalue::OK;
int fd = open(uioNames.irq, O_RDWR);
@ -141,15 +142,17 @@ ReturnValue_t PdecHandler::irqOperation() {
return returnvalue::FAILED;
}
struct pollfd fds = {.fd = fd, .events = POLLIN, .revents = 0};
// Used to unmask IRQ
uint32_t info = 1;
ssize_t nb = 0;
int ret = 0;
// Clear interrupts with dummy read before unmasking the interrupt
ret = *(registerBaseAddress + PDEC_PIR_OFFSET);
// Clear interrupts with dummy read before unmasking the interrupt. Use a volatile to prevent
// read being optimized away.
volatile uint32_t dummy = *(registerBaseAddress + PDEC_PIR_OFFSET);
while (true) {
// Default value to unmask IRQ on the write call.
info = 1;
readCommandQueue();
switch (state) {
case State::INIT:
@ -166,9 +169,12 @@ ReturnValue_t PdecHandler::irqOperation() {
nb = write(fd, &info, sizeof(info));
if (nb != static_cast<ssize_t>(sizeof(info))) {
sif::error << "PdecHandler::irqOperation: Unmasking IRQ failed" << std::endl;
triggerEvent(WRITE_SYSCALL_ERROR_PDEC, errno);
close(fd);
state = State::INIT;
return returnvalue::FAILED;
}
struct pollfd fds = {.fd = fd, .events = POLLIN, .revents = 0};
ret = poll(&fds, 1, IRQ_TIMEOUT_MS);
if (ret == 0) {
// No TCs for timeout period
@ -195,12 +201,15 @@ ReturnValue_t PdecHandler::irqOperation() {
lockCheckCd.resetTimer();
}
// Clear interrupts with dummy read
ret = *(registerBaseAddress + PDEC_PIR_OFFSET);
dummy = *(registerBaseAddress + PDEC_PIR_OFFSET);
}
} else {
sif::error << "PdecHandler::irqOperation: Poll error with errno " << errno << ": "
<< strerror(errno) << std::endl;
triggerEvent(POLL_ERROR_PDEC, errno);
triggerEvent(POLL_SYSCALL_ERROR_PDEC, errno);
close(fd);
state = State::INIT;
return returnvalue::FAILED;
}
break;
}
@ -211,6 +220,8 @@ ReturnValue_t PdecHandler::irqOperation() {
break;
}
}
// To avoid compiler warning
static_cast<void>(dummy);
return returnvalue::OK;
}

3
linux/ipcore/PdecHandler.h
View File

@ -87,7 +87,8 @@ class PdecHandler : public SystemObject, public ExecutableObjectIF, public HasAc
static const Event LOST_CARRIER_LOCK_PDEC = MAKE_EVENT(5, severity::INFO);
//! [EXPORT] : [COMMENT] Lost bit lock
static const Event LOST_BIT_LOCK_PDEC = MAKE_EVENT(6, severity::INFO);
static constexpr Event POLL_ERROR_PDEC = event::makeEvent(SUBSYSTEM_ID, 7, severity::MEDIUM);
static constexpr Event POLL_SYSCALL_ERROR_PDEC = event::makeEvent(SUBSYSTEM_ID, 7, severity::MEDIUM);
static constexpr Event WRITE_SYSCALL_ERROR_PDEC = event::makeEvent(SUBSYSTEM_ID, 8, severity::MEDIUM);
private:
static const uint8_t INTERFACE_ID = CLASS_ID::PDEC_HANDLER;

2
tmtc

@ -1 +1 @@
Subproject commit 94a82b84e86177d122f4ac12eff6e06528f6290b
Subproject commit 33da498ea8aeb2e8b328d040b3cd0720aa12f50c