+static void mthca_setup_cmd_doorbells(struct mthca_dev *dev, u64 base)
+{
+ unsigned long addr;
+ u16 max_off = 0;
+ int i;
+
+ for (i = 0; i < 8; ++i)
+ max_off = max(max_off, dev->cmd.dbell_offsets[i]);
+
+ if ((base & PAGE_MASK) != ((base + max_off) & PAGE_MASK)) {
+ mthca_warn(dev, "Firmware doorbell region at 0x%016llx, "
+ "length 0x%x crosses a page boundary\n",
+ (unsigned long long) base, max_off);
+ return;
+ }
+
+ addr = pci_resource_start(dev->pdev, 2) +
+ ((pci_resource_len(dev->pdev, 2) - 1) & base);
+ dev->cmd.dbell_map = ioremap(addr, max_off + sizeof(u32));
+ if (!dev->cmd.dbell_map)
+ return;
+
+ dev->cmd.flags |= MTHCA_CMD_POST_DOORBELLS;
+ mthca_dbg(dev, "Mapped doorbell page for posting FW commands\n");
+}
+