accel/habanalabs/gaudi2: add signed dev info uAPI

User will provide a nonce via the INFO ioctl, and will retrieve
the signed device info generated using given nonce.

Signed-off-by: Moti Haimovski <mhaimovski@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>

3 files changed, 63 insertions, 0 deletions

diff --git a/drivers/accel/habanalabs/common/firmware_if.c b/drivers/accel/habanalabs/common/firmware_if.c
index 9e9dfe013659..3558a6a8e192 100644
--- a/drivers/accel/habanalabs/common/firmware_if.c
+++ b/drivers/accel/habanalabs/common/firmware_if.c
@@ -3244,6 +3244,14 @@ int hl_fw_get_sec_attest_info(struct hl_device *hdev, struct cpucp_sec_attest_in
 					HL_CPUCP_SEC_ATTEST_INFO_TINEOUT_USEC);
 }
 
+int hl_fw_get_dev_info_signed(struct hl_device *hdev,
+			      struct cpucp_dev_info_signed *dev_info_signed, u32 nonce)
+{
+	return hl_fw_get_sec_attest_data(hdev, CPUCP_PACKET_INFO_SIGNED_GET, dev_info_signed,
+					 sizeof(struct cpucp_dev_info_signed), nonce,
+					 HL_CPUCP_SEC_ATTEST_INFO_TINEOUT_USEC);
+}
+
 int hl_fw_send_generic_request(struct hl_device *hdev, enum hl_passthrough_type sub_opcode,
 						dma_addr_t buff, u32 *size)
 {
diff --git a/drivers/accel/habanalabs/common/habanalabs.h b/drivers/accel/habanalabs/common/habanalabs.h
index 7b0209e5bad6..dd3fe3ddc00a 100644
--- a/drivers/accel/habanalabs/common/habanalabs.h
+++ b/drivers/accel/habanalabs/common/habanalabs.h
@@ -3964,6 +3964,8 @@ long hl_fw_get_max_power(struct hl_device *hdev);
 void hl_fw_set_max_power(struct hl_device *hdev);
 int hl_fw_get_sec_attest_info(struct hl_device *hdev, struct cpucp_sec_attest_info *sec_attest_info,
 				u32 nonce);
+int hl_fw_get_dev_info_signed(struct hl_device *hdev,
+			      struct cpucp_dev_info_signed *dev_info_signed, u32 nonce);
 int hl_set_voltage(struct hl_device *hdev, int sensor_index, u32 attr, long value);
 int hl_set_current(struct hl_device *hdev, int sensor_index, u32 attr, long value);
 int hl_set_power(struct hl_device *hdev, int sensor_index, u32 attr, long value);
diff --git a/drivers/accel/habanalabs/common/habanalabs_ioctl.c b/drivers/accel/habanalabs/common/habanalabs_ioctl.c
index 8ef36effb95b..a92713e0e580 100644
--- a/drivers/accel/habanalabs/common/habanalabs_ioctl.c
+++ b/drivers/accel/habanalabs/common/habanalabs_ioctl.c
@@ -19,6 +19,9 @@
 
 #include <asm/msr.h>
 
+/* make sure there is space for all the signed info */
+static_assert(sizeof(struct cpucp_info) <= SEC_DEV_INFO_BUF_SZ);
+
 static u32 hl_debug_struct_size[HL_DEBUG_OP_TIMESTAMP + 1] = {
 	[HL_DEBUG_OP_ETR] = sizeof(struct hl_debug_params_etr),
 	[HL_DEBUG_OP_ETF] = sizeof(struct hl_debug_params_etf),
@@ -719,6 +722,53 @@ free_sec_attest_info:
 	return rc;
 }
 
+static int dev_info_signed(struct hl_fpriv *hpriv, struct hl_info_args *args)
+{
+	void __user *out = (void __user *) (uintptr_t) args->return_pointer;
+	struct cpucp_dev_info_signed *dev_info_signed;
+	struct hl_info_signed *info;
+	u32 max_size = args->return_size;
+	int rc;
+
+	if ((!max_size) || (!out))
+		return -EINVAL;
+
+	dev_info_signed = kzalloc(sizeof(*dev_info_signed), GFP_KERNEL);
+	if (!dev_info_signed)
+		return -ENOMEM;
+
+	info = kzalloc(sizeof(*info), GFP_KERNEL);
+	if (!info) {
+		rc = -ENOMEM;
+		goto free_dev_info_signed;
+	}
+
+	rc = hl_fw_get_dev_info_signed(hpriv->hdev,
+					dev_info_signed, args->sec_attest_nonce);
+	if (rc)
+		goto free_info;
+
+	info->nonce = le32_to_cpu(dev_info_signed->nonce);
+	info->info_sig_len = dev_info_signed->info_sig_len;
+	info->pub_data_len = le16_to_cpu(dev_info_signed->pub_data_len);
+	info->certificate_len = le16_to_cpu(dev_info_signed->certificate_len);
+	info->dev_info_len = sizeof(struct cpucp_info);
+	memcpy(&info->info_sig, &dev_info_signed->info_sig, sizeof(info->info_sig));
+	memcpy(&info->public_data, &dev_info_signed->public_data, sizeof(info->public_data));
+	memcpy(&info->certificate, &dev_info_signed->certificate, sizeof(info->certificate));
+	memcpy(&info->dev_info, &dev_info_signed->info, info->dev_info_len);
+
+	rc = copy_to_user(out, info, min_t(size_t, max_size, sizeof(*info))) ? -EFAULT : 0;
+
+free_info:
+	kfree(info);
+free_dev_info_signed:
+	kfree(dev_info_signed);
+
+	return rc;
+}
+
+
 static int eventfd_register(struct hl_fpriv *hpriv, struct hl_info_args *args)
 {
 	int rc;
@@ -1089,6 +1139,9 @@ static int _hl_info_ioctl(struct hl_fpriv *hpriv, void *data,
 	case HL_INFO_FW_GENERIC_REQ:
 		return send_fw_generic_request(hdev, args);
 
+	case HL_INFO_DEV_SIGNED:
+		return dev_info_signed(hpriv, args);
+
 	default:
 		dev_err(dev, "Invalid request %d\n", args->op);
 		rc = -EINVAL;