C++ (Cpp) CXL_DEVT_AFU Examples

Example #1

File: file.c Project: 19Dan01/linux

static int __afu_open(struct inode *inode, struct file *file, bool master)
{
	struct cxl *adapter;
	struct cxl_afu *afu;
	struct cxl_context *ctx;
	int adapter_num = CXL_DEVT_ADAPTER(inode->i_rdev);
	int slice = CXL_DEVT_AFU(inode->i_rdev);
	int rc = -ENODEV;

	pr_devel("afu_open afu%i.%i\n", slice, adapter_num);

	if (!(adapter = get_cxl_adapter(adapter_num)))
		return -ENODEV;

	if (slice > adapter->slices)
		goto err_put_adapter;

	spin_lock(&adapter->afu_list_lock);
	if (!(afu = adapter->afu[slice])) {
		spin_unlock(&adapter->afu_list_lock);
		goto err_put_adapter;
	}
	get_device(&afu->dev);
	spin_unlock(&adapter->afu_list_lock);

	if (!afu->current_mode)
		goto err_put_afu;

	if (!(ctx = cxl_context_alloc())) {
		rc = -ENOMEM;
		goto err_put_afu;
	}

	if ((rc = cxl_context_init(ctx, afu, master, inode->i_mapping)))
		goto err_put_afu;

	pr_devel("afu_open pe: %i\n", ctx->pe);
	file->private_data = ctx;
	cxl_ctx_get();

	/* Our ref on the AFU will now hold the adapter */
	put_device(&adapter->dev);

	return 0;

err_put_afu:
	put_device(&afu->dev);
err_put_adapter:
	put_device(&adapter->dev);
	return rc;
}

Example #2

File: file.c Project: AshishNamdev/linux

static int __afu_open(struct inode *inode, struct file *file, bool master)
{
	struct cxl *adapter;
	struct cxl_afu *afu;
	struct cxl_context *ctx;
	int adapter_num = CXL_DEVT_ADAPTER(inode->i_rdev);
	int slice = CXL_DEVT_AFU(inode->i_rdev);
	int rc = -ENODEV;

	pr_devel("afu_open afu%i.%i\n", slice, adapter_num);

	if (!(adapter = get_cxl_adapter(adapter_num)))
		return -ENODEV;

	if (slice > adapter->slices)
		goto err_put_adapter;

	spin_lock(&adapter->afu_list_lock);
	if (!(afu = adapter->afu[slice])) {
		spin_unlock(&adapter->afu_list_lock);
		goto err_put_adapter;
	}

	/*
	 * taking a ref to the afu so that it doesn't go away
	 * for rest of the function. This ref is released before
	 * we return.
	 */
	cxl_afu_get(afu);
	spin_unlock(&adapter->afu_list_lock);

	if (!afu->current_mode)
		goto err_put_afu;

	if (!cxl_ops->link_ok(adapter, afu)) {
		rc = -EIO;
		goto err_put_afu;
	}

	if (!(ctx = cxl_context_alloc())) {
		rc = -ENOMEM;
		goto err_put_afu;
	}

	rc = cxl_context_init(ctx, afu, master);
	if (rc)
		goto err_put_afu;

	cxl_context_set_mapping(ctx, inode->i_mapping);

	pr_devel("afu_open pe: %i\n", ctx->pe);
	file->private_data = ctx;
	cxl_ctx_get();

	/* indicate success */
	rc = 0;

err_put_afu:
	/* release the ref taken earlier */
	cxl_afu_put(afu);
err_put_adapter:
	put_device(&adapter->dev);
	return rc;
}