+static inline void
+io_write64_twopart(uint64_t val, uint32_t *lo, uint32_t *hi)
+{
+ rte_write32(val & ((1ULL << 32) - 1), lo);
+ rte_write32(val >> 32, hi);
+}
+
+static void
+modern_read_dev_config(struct virtio_hw *hw, size_t offset,
+ void *dst, int length)
+{
+ int i;
+ uint8_t *p;
+ uint8_t old_gen, new_gen;
+
+ do {
+ old_gen = rte_read8(&hw->common_cfg->config_generation);
+
+ p = dst;
+ for (i = 0; i < length; i++)
+ *p++ = rte_read8((uint8_t *)hw->dev_cfg + offset + i);
+
+ new_gen = rte_read8(&hw->common_cfg->config_generation);
+ } while (old_gen != new_gen);
+}
+
+static void
+modern_write_dev_config(struct virtio_hw *hw, size_t offset,
+ const void *src, int length)
+{
+ int i;
+ const uint8_t *p = src;
+
+ for (i = 0; i < length; i++)
+ rte_write8((*p++), (((uint8_t *)hw->dev_cfg) + offset + i));
+}
+
+static uint64_t
+modern_get_features(struct virtio_hw *hw)
+{
+ uint32_t features_lo, features_hi;
+
+ rte_write32(0, &hw->common_cfg->device_feature_select);
+ features_lo = rte_read32(&hw->common_cfg->device_feature);
+
+ rte_write32(1, &hw->common_cfg->device_feature_select);
+ features_hi = rte_read32(&hw->common_cfg->device_feature);
+
+ return ((uint64_t)features_hi << 32) | features_lo;
+}
+
+static void
+modern_set_features(struct virtio_hw *hw, uint64_t features)
+{
+ rte_write32(0, &hw->common_cfg->guest_feature_select);
+ rte_write32(features & ((1ULL << 32) - 1),
+ &hw->common_cfg->guest_feature);
+
+ rte_write32(1, &hw->common_cfg->guest_feature_select);
+ rte_write32(features >> 32,
+ &hw->common_cfg->guest_feature);
+}
+
+static uint8_t
+modern_get_status(struct virtio_hw *hw)
+{
+ return rte_read8(&hw->common_cfg->device_status);
+}
+
+static void
+modern_set_status(struct virtio_hw *hw, uint8_t status)
+{
+ rte_write8(status, &hw->common_cfg->device_status);
+}
+
+static void
+modern_reset(struct virtio_hw *hw)
+{
+ modern_set_status(hw, VIRTIO_CONFIG_STATUS_RESET);
+ modern_get_status(hw);
+}
+
+static uint8_t
+modern_get_isr(struct virtio_hw *hw)
+{
+ return rte_read8(hw->isr);
+}
+
+static uint16_t
+modern_set_config_irq(struct virtio_hw *hw, uint16_t vec)
+{
+ rte_write16(vec, &hw->common_cfg->msix_config);
+ return rte_read16(&hw->common_cfg->msix_config);
+}
+
+static uint16_t
+modern_set_queue_irq(struct virtio_hw *hw, struct virtqueue *vq, uint16_t vec)
+{
+ rte_write16(vq->vq_queue_index, &hw->common_cfg->queue_select);
+ rte_write16(vec, &hw->common_cfg->queue_msix_vector);
+ return rte_read16(&hw->common_cfg->queue_msix_vector);
+}
+
+static uint16_t
+modern_get_queue_num(struct virtio_hw *hw, uint16_t queue_id)
+{
+ rte_write16(queue_id, &hw->common_cfg->queue_select);
+ return rte_read16(&hw->common_cfg->queue_size);
+}
+
+static int
+modern_setup_queue(struct virtio_hw *hw, struct virtqueue *vq)
+{
+ uint64_t desc_addr, avail_addr, used_addr;
+ uint16_t notify_off;
+
+ if (!check_vq_phys_addr_ok(vq))
+ return -1;
+
+ desc_addr = vq->vq_ring_mem;
+ avail_addr = desc_addr + vq->vq_nentries * sizeof(struct vring_desc);
+ used_addr = RTE_ALIGN_CEIL(avail_addr + offsetof(struct vring_avail,
+ ring[vq->vq_nentries]),
+ VIRTIO_PCI_VRING_ALIGN);
+
+ rte_write16(vq->vq_queue_index, &hw->common_cfg->queue_select);
+
+ io_write64_twopart(desc_addr, &hw->common_cfg->queue_desc_lo,
+ &hw->common_cfg->queue_desc_hi);
+ io_write64_twopart(avail_addr, &hw->common_cfg->queue_avail_lo,
+ &hw->common_cfg->queue_avail_hi);
+ io_write64_twopart(used_addr, &hw->common_cfg->queue_used_lo,
+ &hw->common_cfg->queue_used_hi);
+
+ notify_off = rte_read16(&hw->common_cfg->queue_notify_off);
+ vq->notify_addr = (void *)((uint8_t *)hw->notify_base +
+ notify_off * hw->notify_off_multiplier);
+
+ rte_write16(1, &hw->common_cfg->queue_enable);
+
+ PMD_INIT_LOG(DEBUG, "queue %u addresses:", vq->vq_queue_index);
+ PMD_INIT_LOG(DEBUG, "\t desc_addr: %" PRIx64, desc_addr);
+ PMD_INIT_LOG(DEBUG, "\t aval_addr: %" PRIx64, avail_addr);
+ PMD_INIT_LOG(DEBUG, "\t used_addr: %" PRIx64, used_addr);
+ PMD_INIT_LOG(DEBUG, "\t notify addr: %p (notify offset: %u)",
+ vq->notify_addr, notify_off);
+
+ return 0;
+}
+
+static void
+modern_del_queue(struct virtio_hw *hw, struct virtqueue *vq)
+{
+ rte_write16(vq->vq_queue_index, &hw->common_cfg->queue_select);
+
+ io_write64_twopart(0, &hw->common_cfg->queue_desc_lo,
+ &hw->common_cfg->queue_desc_hi);
+ io_write64_twopart(0, &hw->common_cfg->queue_avail_lo,
+ &hw->common_cfg->queue_avail_hi);
+ io_write64_twopart(0, &hw->common_cfg->queue_used_lo,
+ &hw->common_cfg->queue_used_hi);
+
+ rte_write16(0, &hw->common_cfg->queue_enable);
+}
+
+static void
+modern_notify_queue(struct virtio_hw *hw __rte_unused, struct virtqueue *vq)
+{
+ rte_write16(vq->vq_queue_index, vq->notify_addr);
+}
+
+const struct virtio_pci_ops modern_ops = {
+ .read_dev_cfg = modern_read_dev_config,
+ .write_dev_cfg = modern_write_dev_config,
+ .reset = modern_reset,
+ .get_status = modern_get_status,
+ .set_status = modern_set_status,
+ .get_features = modern_get_features,
+ .set_features = modern_set_features,
+ .get_isr = modern_get_isr,
+ .set_config_irq = modern_set_config_irq,
+ .set_queue_irq = modern_set_queue_irq,
+ .get_queue_num = modern_get_queue_num,
+ .setup_queue = modern_setup_queue,
+ .del_queue = modern_del_queue,
+ .notify_queue = modern_notify_queue,
+};
+