diff options
| -rw-r--r-- | drivers/iommu/iommu-debug.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/iommu/iommu-debug.c b/drivers/iommu/iommu-debug.c index 39609e717209..55badca6b90c 100644 --- a/drivers/iommu/iommu-debug.c +++ b/drivers/iommu/iommu-debug.c @@ -1442,6 +1442,47 @@ static const struct file_operations iommu_debug_functional_fast_dma_api_fops = { .release = single_release, }; +static int iommu_debug_functional_arm_dma_api_show(struct seq_file *s, + void *ignored) +{ + struct dma_iommu_mapping *mapping; + struct iommu_debug_device *ddev = s->private; + struct device *dev = ddev->dev; + size_t sizes[] = {SZ_4K, SZ_64K, SZ_2M, SZ_1M * 12, 0}; + int ret = -EINVAL; + + mapping = arm_iommu_create_mapping(&platform_bus_type, 0, SZ_1G * 4UL); + if (!mapping) + goto out; + + if (arm_iommu_attach_device(dev, mapping)) + goto out_release_mapping; + + ret = __functional_dma_api_alloc_test(dev, s, mapping->domain, sizes); + ret |= __functional_dma_api_basic_test(dev, s, mapping->domain, sizes); + + arm_iommu_detach_device(dev); +out_release_mapping: + arm_iommu_release_mapping(mapping); +out: + seq_printf(s, "%s\n", ret ? "FAIL" : "SUCCESS"); + return 0; +} + +static int iommu_debug_functional_arm_dma_api_open(struct inode *inode, + struct file *file) +{ + return single_open(file, iommu_debug_functional_arm_dma_api_show, + inode->i_private); +} + +static const struct file_operations iommu_debug_functional_arm_dma_api_fops = { + .open = iommu_debug_functional_arm_dma_api_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + static int iommu_debug_attach_do_attach(struct iommu_debug_device *ddev, int val, bool is_secure) { @@ -1855,6 +1896,13 @@ static int snarf_iommu_devices(struct device *dev, const char *name) goto err_rmdir; } + if (!debugfs_create_file("functional_arm_dma_api", S_IRUSR, dir, ddev, + &iommu_debug_functional_arm_dma_api_fops)) { + pr_err("Couldn't create iommu/devices/%s/functional_arm_dma_api debugfs file\n", + name); + goto err_rmdir; + } + if (!debugfs_create_file("attach", S_IRUSR, dir, ddev, &iommu_debug_attach_fops)) { pr_err("Couldn't create iommu/devices/%s/attach debugfs file\n", |