pci-assign: Remove dead code for direct I/O region access from userspace
This feature was already deprecated back then in qemu-kvm, ie. before pci-assign went upstream. assigned_dev_ioport_rw will never be invoked with resource_fd < 0. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Acked-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Gleb Natapov <gleb@redhat.com>
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@ -154,55 +154,19 @@ static uint64_t assigned_dev_ioport_rw(AssignedDevRegion *dev_region,
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uint64_t val = 0;
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int fd = dev_region->region->resource_fd;
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if (fd >= 0) {
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if (data) {
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DEBUG("pwrite data=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx
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", addr="TARGET_FMT_plx"\n", *data, size, addr, addr);
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if (pwrite(fd, data, size, addr) != size) {
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error_report("%s - pwrite failed %s",
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__func__, strerror(errno));
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}
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} else {
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if (pread(fd, &val, size, addr) != size) {
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error_report("%s - pread failed %s",
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__func__, strerror(errno));
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val = (1UL << (size * 8)) - 1;
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}
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DEBUG("pread val=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx
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", addr=" TARGET_FMT_plx "\n", val, size, addr, addr);
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if (data) {
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DEBUG("pwrite data=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx
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", addr="TARGET_FMT_plx"\n", *data, size, addr, addr);
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if (pwrite(fd, data, size, addr) != size) {
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error_report("%s - pwrite failed %s", __func__, strerror(errno));
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}
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} else {
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uint32_t port = addr + dev_region->u.r_baseport;
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if (data) {
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DEBUG("out data=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx
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", host=%x\n", *data, size, addr, port);
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switch (size) {
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case 1:
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outb(*data, port);
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break;
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case 2:
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outw(*data, port);
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break;
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case 4:
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outl(*data, port);
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break;
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}
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} else {
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switch (size) {
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case 1:
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val = inb(port);
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break;
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case 2:
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val = inw(port);
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break;
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case 4:
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val = inl(port);
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break;
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}
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DEBUG("in data=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx
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", host=%x\n", val, size, addr, port);
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if (pread(fd, &val, size, addr) != size) {
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error_report("%s - pread failed %s", __func__, strerror(errno));
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val = (1UL << (size * 8)) - 1;
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}
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DEBUG("pread val=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx
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", addr=" TARGET_FMT_plx "\n", val, size, addr, addr);
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}
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return val;
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}
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