+static struct ib_ucontext *mthca_alloc_ucontext(struct ib_device *ibdev,
+ struct ib_udata *udata)
+{
+ struct mthca_alloc_ucontext_resp uresp;
+ struct mthca_ucontext *context;
+ int err;
+
+ memset(&uresp, 0, sizeof uresp);
+
+ uresp.qp_tab_size = to_mdev(ibdev)->limits.num_qps;
+ if (mthca_is_memfree(to_mdev(ibdev)))
+ uresp.uarc_size = to_mdev(ibdev)->uar_table.uarc_size;
+ else
+ uresp.uarc_size = 0;
+
+ context = kmalloc(sizeof *context, GFP_KERNEL);
+ if (!context)
+ return ERR_PTR(-ENOMEM);
+
+ err = mthca_uar_alloc(to_mdev(ibdev), &context->uar);
+ if (err) {
+ kfree(context);
+ return ERR_PTR(err);
+ }
+
+ context->db_tab = mthca_init_user_db_tab(to_mdev(ibdev));
+ if (IS_ERR(context->db_tab)) {
+ err = PTR_ERR(context->db_tab);
+ mthca_uar_free(to_mdev(ibdev), &context->uar);
+ kfree(context);
+ return ERR_PTR(err);
+ }
+
+ if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
+ mthca_cleanup_user_db_tab(to_mdev(ibdev), &context->uar, context->db_tab);
+ mthca_uar_free(to_mdev(ibdev), &context->uar);
+ kfree(context);
+ return ERR_PTR(-EFAULT);
+ }
+
+ return &context->ibucontext;
+}
+
+static int mthca_dealloc_ucontext(struct ib_ucontext *context)
+{
+ mthca_cleanup_user_db_tab(to_mdev(context->device), &to_mucontext(context)->uar,
+ to_mucontext(context)->db_tab);
+ mthca_uar_free(to_mdev(context->device), &to_mucontext(context)->uar);
+ kfree(to_mucontext(context));
+
+ return 0;
+}
+
+static int mthca_mmap_uar(struct ib_ucontext *context,
+ struct vm_area_struct *vma)
+{
+ if (vma->vm_end - vma->vm_start != PAGE_SIZE)
+ return -EINVAL;
+
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
+ if (io_remap_pfn_range(vma, vma->vm_start,
+ to_mucontext(context)->uar.pfn,
+ PAGE_SIZE, vma->vm_page_prot))
+ return -EAGAIN;
+
+ return 0;
+}
+
+static struct ib_pd *mthca_alloc_pd(struct ib_device *ibdev,
+ struct ib_ucontext *context,
+ struct ib_udata *udata)