@@ -1021,10 +1021,80 @@ static ssize_t afu_read(struct file *file, char __user *buf, size_t count,
goto out;
}
+/**
+ * afu_release() - release and free the context
+ * @inode: File inode pointer.
+ * @file: File associated with the context.
+ *
+ * Return: 0 on success, -errno on failure
+ */
+static int afu_release(struct inode *inode, struct file *file)
+{
+ struct ocxlflash_context *ctx = file->private_data;
+ int i;
+
+ /* Unmap and free the interrupts associated with the context */
+ for (i = ctx->num_irqs; i >= 0; i--)
+ afu_unmap_irq(0, ctx, i, ctx);
+ free_afu_irqs(ctx);
+
+ return ocxlflash_release_context(ctx);
+}
+
+/**
+ * ocxlflash_mmap_fault() - mmap fault handler
+ * @vmf: VM fault associated with current fault.
+ *
+ * Return: 0 on success, -errno on failure
+ */
+static int ocxlflash_mmap_fault(struct vm_fault *vmf)
+{
+ struct vm_area_struct *vma = vmf->vma;
+ struct ocxlflash_context *ctx = vma->vm_file->private_data;
+ u64 mmio_area, offset;
+
+ offset = vmf->pgoff << PAGE_SHIFT;
+ if (offset >= ctx->psn_size)
+ return VM_FAULT_SIGBUS;
+
+ mmio_area = ctx->psn_phys;
+ mmio_area += offset;
+
+ vm_insert_pfn(vma, vmf->address, mmio_area >> PAGE_SHIFT);
+ return VM_FAULT_NOPAGE;
+}
+
+static const struct vm_operations_struct ocxlflash_vmops = {
+ .fault = ocxlflash_mmap_fault,
+};
+
+/**
+ * afu_mmap() - map the fault handler operations
+ * @file: File associated with the context.
+ * @vma: VM area associated with mapping.
+ *
+ * Return: 0 on success, -errno on failure
+ */
+static int afu_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct ocxlflash_context *ctx = file->private_data;
+
+ if ((vma_pages(vma) + vma->vm_pgoff) >
+ (ctx->psn_size >> PAGE_SHIFT))
+ return -EINVAL;
+
+ vma->vm_flags |= VM_IO | VM_PFNMAP;
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+ vma->vm_ops = &ocxlflash_vmops;
+ return 0;
+}
+
static const struct file_operations ocxl_afu_fops = {
.owner = THIS_MODULE,
.poll = afu_poll,
.read = afu_read,
+ .release = afu_release,
+ .mmap = afu_mmap,
};
#define PATCH_FOPS(NAME) \
@@ -1071,6 +1141,8 @@ static struct file *ocxlflash_get_fd(void *ctx_cookie,
if (fops) {
PATCH_FOPS(poll);
PATCH_FOPS(read);
+ PATCH_FOPS(release);
+ PATCH_FOPS(mmap);
} else /* Use default ops */
fops = (struct file_operations *)&ocxl_afu_fops;