AxiMemMap.cpp

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#include "rogue/Directives.h"
 
#include "rogue/hardware/axi/AxiMemMap.h"
 
#include <fcntl.h>
#include <inttypes.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
 
#include <cstdio>
#include <cstring>
#include <memory>
#include <string>
#include <thread>
 
#include "rogue/GeneralError.h"
#include "rogue/GilRelease.h"
#include "rogue/hardware/drivers/AxisDriver.h"
#include "rogue/interfaces/memory/Constants.h"
#include "rogue/interfaces/memory/Transaction.h"
#include "rogue/interfaces/memory/TransactionLock.h"
 
namespace rha = rogue::hardware::axi;
namespace rim = rogue::interfaces::memory;
 
#ifndef NO_PYTHON
    #include <boost/python.hpp>
namespace bp = boost::python;
#endif
 
rha::AxiMemMapPtr rha::AxiMemMap::create(std::string path) {
    rha::AxiMemMapPtr r = std::make_shared<rha::AxiMemMap>(path);
    return (r);
}
 
rha::AxiMemMap::AxiMemMap(std::string path) : rim::Slave(4, 0xFFFFFFFF) {
    fd_  = ::open(path.c_str(), O_RDWR);
    log_ = rogue::Logging::create("axi.AxiMemMap");
    if (fd_ < 0)
        throw(rogue::GeneralError::create("AxiMemMap::AxiMemMap", "Failed to open device file: %s", path.c_str()));
 
    // Check driver version ( ApiVersion 0x05 (or less) is the 32-bit address version)
    if (dmaGetApiVersion(fd_) < 0x06) {
        throw(rogue::GeneralError("AxiMemMap::AxiMemMap",
                                  R"(Bad kernel driver version detected. Please re-compile kernel driver.
          Note that aes-stream-driver (v5.15.2 or earlier) and rogue (v5.11.1 or earlier) are compatible with the 32-bit address API.
          To use later versions (64-bit address API),, you will need to upgrade both rogue and aes-stream-driver at the same time to:
          \t\taes-stream-driver = v5.16.0 (or later)
          \t\trogue = v5.13.0 (or later))"));
    }
 
    // Check for mismatch in the rogue/loaded_driver API versions
    if (dmaCheckVersion(fd_) < 0) {
        ::close(fd_);
        throw(rogue::GeneralError(
            "AxiMemMap::AxiMemMap",
            "Rogue DmaDriver.h API Version (DMA_VERSION) does not match the aes-stream-driver API version"));
    }
 
    // Start read thread
    threadEn_ = true;
    thread_   = new std::thread(&rha::AxiMemMap::runThread, this);
}
 
rha::AxiMemMap::~AxiMemMap() {
    this->stop();
}
 
// Stop
void rha::AxiMemMap::stop() {
    if (threadEn_) {
        rogue::GilRelease noGil;
        threadEn_ = false;
        queue_.stop();
        thread_->join();
        ::close(fd_);
    }
}
 
void rha::AxiMemMap::doTransaction(rim::TransactionPtr tran) {
    rogue::GilRelease noGil;
    queue_.push(tran);
}
 
void rha::AxiMemMap::runThread() {
    rim::TransactionPtr tran;
    rim::Transaction::iterator it;
 
    uint32_t count;
    uint32_t data;
    uint32_t dataSize;
    int32_t ret;
    uint8_t* ptr;
 
    dataSize = sizeof(uint32_t);
    ptr      = reinterpret_cast<uint8_t*>(&data);
 
    log_->logThreadId();
 
    while (threadEn_) {
        if ((tran = queue_.pop()) != NULL) {
            if ((tran->size() % dataSize) != 0) {
                tran->error("Invalid transaction size %" PRIu32 ", must be an integer number of %" PRIu32 " bytes",
                            tran->size(),
                            dataSize);
                tran.reset();
                continue;
            }
 
            count = 0;
            ret   = 0;
 
            rim::TransactionLockPtr lock = tran->lock();
 
            if (tran->expired()) {
                log_->warning("Transaction expired. Id=%" PRIu32, tran->id());
                tran.reset();
                continue;
            }
 
            it = tran->begin();
 
            while ((ret == 0) && (count != tran->size())) {
                if (tran->type() == rim::Write || tran->type() == rim::Post) {
                    // Assume transaction has a contiguous memory block
                    std::memcpy(ptr, it, dataSize);
                    ret = dmaWriteRegister(fd_, tran->address() + count, data);
                } else {
                    ret = dmaReadRegister(fd_, tran->address() + count, &data);
                    std::memcpy(it, ptr, dataSize);
                }
                count += dataSize;
                it += dataSize;
            }
 
            log_->debug("Transaction id=%" PRIu32 ", addr 0x%016" PRIx64 ". Size=%" PRIu32 ", type=%" PRIu32
                        ", data=0x%08" PRIu32,
                        tran->id(),
                        tran->address(),
                        tran->size(),
                        tran->type(),
                        data);
            if (ret != 0)
                tran->error("Memory transaction failed with error code %" PRIi32 ", see driver error codes", ret);
            else
                tran->done();
        }
    }
}
 
void rha::AxiMemMap::setup_python() {
#ifndef NO_PYTHON
 
    bp::class_<rha::AxiMemMap, rha::AxiMemMapPtr, bp::bases<rim::Slave>, boost::noncopyable>("AxiMemMap",
                                                                                             bp::init<std::string>());
 
    bp::implicitly_convertible<rha::AxiMemMapPtr, rim::SlavePtr>();
#endif
}