- if (already_mapped)
- continue;
- pages[pages_n++] = uar_va;
- addr = mmap((void *)uar_va, page_size,
- PROT_WRITE, MAP_FIXED | MAP_SHARED, fd,
- txq_ctrl->uar_mmap_offset);
- if (addr != (void *)uar_va) {
- ERROR("call to mmap failed on UAR for txq %d\n", i);
- return -1;
+ /* new address in reserved UAR address space. */
+ addr = RTE_PTR_ADD(priv->uar_base,
+ uar_va & (MLX5_UAR_SIZE - 1));
+ if (!already_mapped) {
+ pages[pages_n++] = uar_va;
+ /* fixed mmap to specified address in reserved
+ * address space.
+ */
+ ret = mmap(addr, page_size,
+ PROT_WRITE, MAP_FIXED | MAP_SHARED, fd,
+ txq_ctrl->uar_mmap_offset);
+ if (ret != addr) {
+ /* fixed mmap have to return same address */
+ DRV_LOG(ERR,
+ "port %u call to mmap failed on UAR"
+ " for txq %u",
+ dev->data->port_id, txq_ctrl->idx);
+ rte_errno = ENXIO;
+ return -rte_errno;
+ }