drivers/accel/habanalabs/common/habanalabs_ioctl.c

Source file repositories/reference/linux-study-clean/drivers/accel/habanalabs/common/habanalabs_ioctl.c

File Facts

System
Linux kernel
Corpus path
drivers/accel/habanalabs/common/habanalabs_ioctl.c
Extension
.c
Size
37263 bytes
Lines
1320
Domain
Driver Families
Bucket
drivers/accel
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (!input) {
			rc = -ENOMEM;
			goto out;
		}

		if (copy_from_user(input, u64_to_user_ptr(args->input_ptr),
					args->input_size)) {
			rc = -EFAULT;
			dev_err(hdev->dev, "failed to copy input debug data\n");
			goto out;
		}

		params->input = input;
	}

	if (args->output_ptr && args->output_size) {
		output = kzalloc(args->output_size, GFP_KERNEL);
		if (!output) {
			rc = -ENOMEM;
			goto out;
		}

		params->output = output;
		params->output_size = args->output_size;
	}

	rc = hdev->asic_funcs->debug_coresight(hdev, ctx, params);
	if (rc) {
		dev_err(hdev->dev,
			"debug coresight operation failed %d\n", rc);
		goto out;
	}

	if (output && copy_to_user((void __user *) (uintptr_t) args->output_ptr,
					output, args->output_size)) {
		dev_err(hdev->dev, "copy to user failed in debug ioctl\n");
		rc = -EFAULT;
		goto out;
	}


out:
	kfree(params);
	kfree(output);
	kfree(input);

	return rc;
}

static int device_utilization(struct hl_device *hdev, struct hl_info_args *args)
{
	struct hl_info_device_utilization device_util = {0};
	u32 max_size = args->return_size;
	void __user *out = (void __user *) (uintptr_t) args->return_pointer;
	int rc;

	if ((!max_size) || (!out))
		return -EINVAL;

	rc = hl_device_utilization(hdev, &device_util.utilization);
	if (rc)
		return -EINVAL;

	return copy_to_user(out, &device_util,
		min((size_t) max_size, sizeof(device_util))) ? -EFAULT : 0;
}

static int get_clk_rate(struct hl_device *hdev, struct hl_info_args *args)
{
	struct hl_info_clk_rate clk_rate = {0};
	u32 max_size = args->return_size;
	void __user *out = (void __user *) (uintptr_t) args->return_pointer;
	int rc;

	if ((!max_size) || (!out))
		return -EINVAL;

	rc = hl_fw_get_clk_rate(hdev, &clk_rate.cur_clk_rate_mhz, &clk_rate.max_clk_rate_mhz);
	if (rc)
		return rc;

	return copy_to_user(out, &clk_rate, min_t(size_t, max_size, sizeof(clk_rate)))
										? -EFAULT : 0;
}

static int get_reset_count(struct hl_device *hdev, struct hl_info_args *args)
{
	struct hl_info_reset_count reset_count = {0};
	u32 max_size = args->return_size;
	void __user *out = (void __user *) (uintptr_t) args->return_pointer;

Annotation

Implementation Notes