+static int mmap_rcvhdrq(struct vm_area_struct *vma,
+ struct ipath_portdata *pd)
+{
+ struct ipath_devdata *dd = pd->port_dd;
+ size_t total_size;
+ int ret;
+
+ /*
+ * kmalloc'ed memory, physically contiguous; this is from
+ * spi_rcvhdr_base; we allow user to map read-write so they can
+ * write hdrq entries to allow protocol code to directly poll
+ * whether a hdrq entry has been written.
+ */
+ total_size = ALIGN(dd->ipath_rcvhdrcnt * dd->ipath_rcvhdrentsize *
+ sizeof(u32), PAGE_SIZE);
+ if ((vma->vm_end - vma->vm_start) > total_size) {
+ dev_info(&dd->pcidev->dev,
+ "FAIL on rcvhdrq: reqlen %lx > actual %lx\n",
+ vma->vm_end - vma->vm_start,
+ (unsigned long) total_size);
+ ret = -EFAULT;
+ goto bail;
+ }
+
+ ret = remap_pfn_range(vma, vma->vm_start,
+ pd->port_rcvhdrq_phys >> PAGE_SHIFT,
+ vma->vm_end - vma->vm_start,
+ vma->vm_page_prot);
+bail:
+ return ret;
+}
+
+static int mmap_pioavailregs(struct vm_area_struct *vma,
+ struct ipath_portdata *pd)
+{
+ struct ipath_devdata *dd = pd->port_dd;
+ int ret;
+
+ /*
+ * when we map the PIO bufferavail registers, we want to map them as
+ * readonly, no write possible.
+ *
+ * kmalloc'ed memory, physically contiguous, one page only, readonly
+ */
+
+ if ((vma->vm_end - vma->vm_start) > PAGE_SIZE) {
+ dev_info(&dd->pcidev->dev, "FAIL on pioavailregs_dma: "
+ "reqlen %lx > actual %lx\n",
+ vma->vm_end - vma->vm_start,
+ (unsigned long) PAGE_SIZE);
+ ret = -EFAULT;
+ goto bail;
+ }
+
+ if (vma->vm_flags & VM_WRITE) {
+ dev_info(&dd->pcidev->dev,
+ "Can't map pioavailregs as writable (flags=%lx)\n",
+ vma->vm_flags);
+ ret = -EPERM;
+ goto bail;
+ }
+
+ /* don't allow them to later change with mprotect */
+ vma->vm_flags &= ~VM_MAYWRITE;
+
+ ret = remap_pfn_range(vma, vma->vm_start,
+ dd->ipath_pioavailregs_phys >> PAGE_SHIFT,
+ PAGE_SIZE, vma->vm_page_prot);
+bail:
+ return ret;
+}
+