[PATCH v5 0/2] tpm_ffa_crb: add support direct message request v2

[PATCH v5 0/2] tpm_ffa_crb: add support direct message request v2

[Yeoreum Yun]

This patch supports to access TPM crb buffer accsess over FF-A via
direct message request v2 ABI and include small fix.

Since v4:
   - rewokring with commit message.
   - https://lore.kernel.org/all/20250415075712.2157073-1-yeoreum.yun@arm.com/

Since v3:
   - replace pr_xxx() usage to dev_xx() to print log.
   - https://lore.kernel.org/all/20250412054721.1647439-1-yeoreum.yun@arm.com/

Since v2:
    - rewokring commit message
    - https://lore.kernel.org/all/20250411090856.1417021-1-yeoreum.yun@arm.com/

Since v1:
    - Fix indentation.
    - https://lore.kernel.org/all/20250410110701.1244965-1-yeoreum.yun@arm.com/


Yeoreum Yun (2):
  tpm_ffa_crb: access tpm service over FF-A direct message request v2
  tpm_crb_ffa: use dev_xx() macro to print log

 drivers/char/tpm/tpm_crb_ffa.c | 63 ++++++++++++++++++++++++----------
 1 file changed, 44 insertions(+), 19 deletions(-)

--
LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}

[PATCH v5 1/2] tpm_ffa_crb: access tpm service over FF-A direct message request v2

[Yeoreum Yun]

For secure partition with multi service, tpm_ffa_crb can access tpm
service with direct message request v2 interface according to chapter 3.3,
TPM Service Command Response Buffer Interface Over FF-A specificationi v1.0 BET.

This patch reflects this spec to access tpm service over
FF-A direct message request v2 ABI.

Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Yeoreum Yun <yeoreum.yun@arm.com>
---
 drivers/char/tpm/tpm_crb_ffa.c | 55 ++++++++++++++++++++++++----------
 1 file changed, 40 insertions(+), 15 deletions(-)

diff --git a/drivers/char/tpm/tpm_crb_ffa.c b/drivers/char/tpm/tpm_crb_ffa.c
index 3169a87a56b6..fed775cf53ab 100644
--- a/drivers/char/tpm/tpm_crb_ffa.c
+++ b/drivers/char/tpm/tpm_crb_ffa.c
@@ -105,7 +105,10 @@ struct tpm_crb_ffa {
 	u16 minor_version;
 	/* lock to protect sending of FF-A messages: */
 	struct mutex msg_data_lock;
-	struct ffa_send_direct_data direct_msg_data;
+	union {
+		struct ffa_send_direct_data direct_msg_data;
+		struct ffa_send_direct_data2 direct_msg_data2;
+	};
 };
 
 static struct tpm_crb_ffa *tpm_crb_ffa;
@@ -185,18 +188,34 @@ static int __tpm_crb_ffa_send_recieve(unsigned long func_id,
 
 	msg_ops = tpm_crb_ffa->ffa_dev->ops->msg_ops;
 
-	memset(&tpm_crb_ffa->direct_msg_data, 0x00,
-	       sizeof(struct ffa_send_direct_data));
-
-	tpm_crb_ffa->direct_msg_data.data1 = func_id;
-	tpm_crb_ffa->direct_msg_data.data2 = a0;
-	tpm_crb_ffa->direct_msg_data.data3 = a1;
-	tpm_crb_ffa->direct_msg_data.data4 = a2;
+	if (ffa_partition_supports_direct_req2_recv(tpm_crb_ffa->ffa_dev)) {
+		memset(&tpm_crb_ffa->direct_msg_data2, 0x00,
+		       sizeof(struct ffa_send_direct_data2));
+
+		tpm_crb_ffa->direct_msg_data2.data[0] = func_id;
+		tpm_crb_ffa->direct_msg_data2.data[1] = a0;
+		tpm_crb_ffa->direct_msg_data2.data[2] = a1;
+		tpm_crb_ffa->direct_msg_data2.data[3] = a2;
+
+		ret = msg_ops->sync_send_receive2(tpm_crb_ffa->ffa_dev,
+				&tpm_crb_ffa->direct_msg_data2);
+		if (!ret)
+			ret = tpm_crb_ffa_to_linux_errno(tpm_crb_ffa->direct_msg_data2.data[0]);
+	} else {
+		memset(&tpm_crb_ffa->direct_msg_data, 0x00,
+		       sizeof(struct ffa_send_direct_data));
+
+		tpm_crb_ffa->direct_msg_data.data1 = func_id;
+		tpm_crb_ffa->direct_msg_data.data2 = a0;
+		tpm_crb_ffa->direct_msg_data.data3 = a1;
+		tpm_crb_ffa->direct_msg_data.data4 = a2;
+
+		ret = msg_ops->sync_send_receive(tpm_crb_ffa->ffa_dev,
+				&tpm_crb_ffa->direct_msg_data);
+		if (!ret)
+			ret = tpm_crb_ffa_to_linux_errno(tpm_crb_ffa->direct_msg_data.data1);
+	}
 
-	ret = msg_ops->sync_send_receive(tpm_crb_ffa->ffa_dev,
-			&tpm_crb_ffa->direct_msg_data);
-	if (!ret)
-		ret = tpm_crb_ffa_to_linux_errno(tpm_crb_ffa->direct_msg_data.data1);
 
 	return ret;
 }
@@ -231,8 +250,13 @@ int tpm_crb_ffa_get_interface_version(u16 *major, u16 *minor)
 
 	rc = __tpm_crb_ffa_send_recieve(CRB_FFA_GET_INTERFACE_VERSION, 0x00, 0x00, 0x00);
 	if (!rc) {
-		*major = CRB_FFA_MAJOR_VERSION(tpm_crb_ffa->direct_msg_data.data2);
-		*minor = CRB_FFA_MINOR_VERSION(tpm_crb_ffa->direct_msg_data.data2);
+		if (ffa_partition_supports_direct_req2_recv(tpm_crb_ffa->ffa_dev)) {
+			*major = CRB_FFA_MAJOR_VERSION(tpm_crb_ffa->direct_msg_data2.data[1]);
+			*minor = CRB_FFA_MINOR_VERSION(tpm_crb_ffa->direct_msg_data2.data[1]);
+		} else {
+			*major = CRB_FFA_MAJOR_VERSION(tpm_crb_ffa->direct_msg_data.data2);
+			*minor = CRB_FFA_MINOR_VERSION(tpm_crb_ffa->direct_msg_data.data2);
+		}
 	}
 
 	return rc;
@@ -277,7 +301,8 @@ static int tpm_crb_ffa_probe(struct ffa_device *ffa_dev)
 
 	tpm_crb_ffa = ERR_PTR(-ENODEV); // set tpm_crb_ffa so we can detect probe failure
 
-	if (!ffa_partition_supports_direct_recv(ffa_dev)) {
+	if (!ffa_partition_supports_direct_recv(ffa_dev) &&
+	    !ffa_partition_supports_direct_req2_recv(ffa_dev)) {
 		pr_err("TPM partition doesn't support direct message receive.\n");
 		return -EINVAL;
 	}
-- 
LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}

Re: [PATCH v5 1/2] tpm_ffa_crb: access tpm service over FF-A direct message request v2

[Jarkko Sakkinen]

On Tue, Apr 15, 2025 at 07:50:12PM +0100, Yeoreum Yun wrote:
> For secure partition with multi service, tpm_ffa_crb can access tpm
> service with direct message request v2 interface according to chapter 3.3,
> TPM Service Command Response Buffer Interface Over FF-A specificationi v1.0 BET.
> 
> This patch reflects this spec to access tpm service over
> FF-A direct message request v2 ABI.
> 
> Acked-by: Sudeep Holla <sudeep.holla@arm.com>
> Signed-off-by: Yeoreum Yun <yeoreum.yun@arm.com>
> ---
>  drivers/char/tpm/tpm_crb_ffa.c | 55 ++++++++++++++++++++++++----------
>  1 file changed, 40 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/char/tpm/tpm_crb_ffa.c b/drivers/char/tpm/tpm_crb_ffa.c
> index 3169a87a56b6..fed775cf53ab 100644
> --- a/drivers/char/tpm/tpm_crb_ffa.c
> +++ b/drivers/char/tpm/tpm_crb_ffa.c
> @@ -105,7 +105,10 @@ struct tpm_crb_ffa {
>  	u16 minor_version;
>  	/* lock to protect sending of FF-A messages: */
>  	struct mutex msg_data_lock;
> -	struct ffa_send_direct_data direct_msg_data;
> +	union {
> +		struct ffa_send_direct_data direct_msg_data;
> +		struct ffa_send_direct_data2 direct_msg_data2;
> +	};
>  };
>  
>  static struct tpm_crb_ffa *tpm_crb_ffa;
> @@ -185,18 +188,34 @@ static int __tpm_crb_ffa_send_recieve(unsigned long func_id,
>  
>  	msg_ops = tpm_crb_ffa->ffa_dev->ops->msg_ops;
>  
> -	memset(&tpm_crb_ffa->direct_msg_data, 0x00,
> -	       sizeof(struct ffa_send_direct_data));
> -
> -	tpm_crb_ffa->direct_msg_data.data1 = func_id;
> -	tpm_crb_ffa->direct_msg_data.data2 = a0;
> -	tpm_crb_ffa->direct_msg_data.data3 = a1;
> -	tpm_crb_ffa->direct_msg_data.data4 = a2;
> +	if (ffa_partition_supports_direct_req2_recv(tpm_crb_ffa->ffa_dev)) {
> +		memset(&tpm_crb_ffa->direct_msg_data2, 0x00,
> +		       sizeof(struct ffa_send_direct_data2));
> +
> +		tpm_crb_ffa->direct_msg_data2.data[0] = func_id;
> +		tpm_crb_ffa->direct_msg_data2.data[1] = a0;
> +		tpm_crb_ffa->direct_msg_data2.data[2] = a1;
> +		tpm_crb_ffa->direct_msg_data2.data[3] = a2;
> +
> +		ret = msg_ops->sync_send_receive2(tpm_crb_ffa->ffa_dev,
> +				&tpm_crb_ffa->direct_msg_data2);
> +		if (!ret)
> +			ret = tpm_crb_ffa_to_linux_errno(tpm_crb_ffa->direct_msg_data2.data[0]);
> +	} else {
> +		memset(&tpm_crb_ffa->direct_msg_data, 0x00,
> +		       sizeof(struct ffa_send_direct_data));
> +
> +		tpm_crb_ffa->direct_msg_data.data1 = func_id;
> +		tpm_crb_ffa->direct_msg_data.data2 = a0;
> +		tpm_crb_ffa->direct_msg_data.data3 = a1;
> +		tpm_crb_ffa->direct_msg_data.data4 = a2;
> +
> +		ret = msg_ops->sync_send_receive(tpm_crb_ffa->ffa_dev,
> +				&tpm_crb_ffa->direct_msg_data);
> +		if (!ret)
> +			ret = tpm_crb_ffa_to_linux_errno(tpm_crb_ffa->direct_msg_data.data1);
> +	}
>  
> -	ret = msg_ops->sync_send_receive(tpm_crb_ffa->ffa_dev,
> -			&tpm_crb_ffa->direct_msg_data);
> -	if (!ret)
> -		ret = tpm_crb_ffa_to_linux_errno(tpm_crb_ffa->direct_msg_data.data1);
>  
>  	return ret;
>  }
> @@ -231,8 +250,13 @@ int tpm_crb_ffa_get_interface_version(u16 *major, u16 *minor)
>  
>  	rc = __tpm_crb_ffa_send_recieve(CRB_FFA_GET_INTERFACE_VERSION, 0x00, 0x00, 0x00);
>  	if (!rc) {
> -		*major = CRB_FFA_MAJOR_VERSION(tpm_crb_ffa->direct_msg_data.data2);
> -		*minor = CRB_FFA_MINOR_VERSION(tpm_crb_ffa->direct_msg_data.data2);
> +		if (ffa_partition_supports_direct_req2_recv(tpm_crb_ffa->ffa_dev)) {
> +			*major = CRB_FFA_MAJOR_VERSION(tpm_crb_ffa->direct_msg_data2.data[1]);
> +			*minor = CRB_FFA_MINOR_VERSION(tpm_crb_ffa->direct_msg_data2.data[1]);
> +		} else {
> +			*major = CRB_FFA_MAJOR_VERSION(tpm_crb_ffa->direct_msg_data.data2);
> +			*minor = CRB_FFA_MINOR_VERSION(tpm_crb_ffa->direct_msg_data.data2);
> +		}
>  	}
>  
>  	return rc;
> @@ -277,7 +301,8 @@ static int tpm_crb_ffa_probe(struct ffa_device *ffa_dev)
>  
>  	tpm_crb_ffa = ERR_PTR(-ENODEV); // set tpm_crb_ffa so we can detect probe failure
>  
> -	if (!ffa_partition_supports_direct_recv(ffa_dev)) {
> +	if (!ffa_partition_supports_direct_recv(ffa_dev) &&
> +	    !ffa_partition_supports_direct_req2_recv(ffa_dev)) {
>  		pr_err("TPM partition doesn't support direct message receive.\n");
>  		return -EINVAL;
>  	}
> -- 
> LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}
> 
> 

Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>

BR, Jarkko

[PATCH v5 2/2] tpm_crb_ffa: use dev_xx() macro to print log

[Yeoreum Yun]

Instead of pr_xxx() macro, use dev_xxx() to print log.
This patch changes some error log level to warn log level when
the tpm_crb_ffa secure partition doesn't support properly but
system can run without it.
(i.e) unsupport of direct message ABI or unsupported ABI version

Signed-off-by: Yeoreum Yun <yeoreum.yun@arm.com>
---
 drivers/char/tpm/tpm_crb_ffa.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/char/tpm/tpm_crb_ffa.c b/drivers/char/tpm/tpm_crb_ffa.c
index fed775cf53ab..66b38b2cbdd5 100644
--- a/drivers/char/tpm/tpm_crb_ffa.c
+++ b/drivers/char/tpm/tpm_crb_ffa.c
@@ -303,7 +303,7 @@ static int tpm_crb_ffa_probe(struct ffa_device *ffa_dev)
 
 	if (!ffa_partition_supports_direct_recv(ffa_dev) &&
 	    !ffa_partition_supports_direct_req2_recv(ffa_dev)) {
-		pr_err("TPM partition doesn't support direct message receive.\n");
+		dev_warn(&ffa_dev->dev, "partition doesn't support direct message receive.\n");
 		return -EINVAL;
 	}
 
@@ -324,17 +324,17 @@ static int tpm_crb_ffa_probe(struct ffa_device *ffa_dev)
 	rc = tpm_crb_ffa_get_interface_version(&tpm_crb_ffa->major_version,
 					       &tpm_crb_ffa->minor_version);
 	if (rc) {
-		pr_err("failed to get crb interface version. rc:%d", rc);
+		dev_err(&ffa_dev->dev, "failed to get crb interface version. rc:%d\n", rc);
 		goto out;
 	}
 
-	pr_info("ABI version %u.%u", tpm_crb_ffa->major_version,
+	dev_info(&ffa_dev->dev, "ABI version %u.%u\n", tpm_crb_ffa->major_version,
 		tpm_crb_ffa->minor_version);
 
 	if (tpm_crb_ffa->major_version != CRB_FFA_VERSION_MAJOR ||
 	    (tpm_crb_ffa->minor_version > 0 &&
 	    tpm_crb_ffa->minor_version < CRB_FFA_VERSION_MINOR)) {
-		pr_err("Incompatible ABI version");
+		dev_warn(&ffa_dev->dev, "Incompatible ABI version\n");
 		goto out;
 	}
 
-- 
LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}

Re: [PATCH v5 2/2] tpm_crb_ffa: use dev_xx() macro to print log

[Stefano Garzarella]

On Tue, Apr 15, 2025 at 07:50:13PM +0100, Yeoreum Yun wrote:
>Instead of pr_xxx() macro, use dev_xxx() to print log.
>This patch changes some error log level to warn log level when
>the tpm_crb_ffa secure partition doesn't support properly but
>system can run without it.
>(i.e) unsupport of direct message ABI or unsupported ABI version
>
>Signed-off-by: Yeoreum Yun <yeoreum.yun@arm.com>
>---
> drivers/char/tpm/tpm_crb_ffa.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)

LGTM!

Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>

>
>diff --git a/drivers/char/tpm/tpm_crb_ffa.c b/drivers/char/tpm/tpm_crb_ffa.c
>index fed775cf53ab..66b38b2cbdd5 100644
>--- a/drivers/char/tpm/tpm_crb_ffa.c
>+++ b/drivers/char/tpm/tpm_crb_ffa.c
>@@ -303,7 +303,7 @@ static int tpm_crb_ffa_probe(struct ffa_device *ffa_dev)
>
> 	if (!ffa_partition_supports_direct_recv(ffa_dev) &&
> 	    !ffa_partition_supports_direct_req2_recv(ffa_dev)) {
>-		pr_err("TPM partition doesn't support direct message receive.\n");
>+		dev_warn(&ffa_dev->dev, "partition doesn't support direct message receive.\n");
> 		return -EINVAL;
> 	}
>
>@@ -324,17 +324,17 @@ static int tpm_crb_ffa_probe(struct ffa_device *ffa_dev)
> 	rc = tpm_crb_ffa_get_interface_version(&tpm_crb_ffa->major_version,
> 					       &tpm_crb_ffa->minor_version);
> 	if (rc) {
>-		pr_err("failed to get crb interface version. rc:%d", rc);
>+		dev_err(&ffa_dev->dev, "failed to get crb interface version. rc:%d\n", rc);
> 		goto out;
> 	}
>
>-	pr_info("ABI version %u.%u", tpm_crb_ffa->major_version,
>+	dev_info(&ffa_dev->dev, "ABI version %u.%u\n", tpm_crb_ffa->major_version,
> 		tpm_crb_ffa->minor_version);
>
> 	if (tpm_crb_ffa->major_version != CRB_FFA_VERSION_MAJOR ||
> 	    (tpm_crb_ffa->minor_version > 0 &&
> 	    tpm_crb_ffa->minor_version < CRB_FFA_VERSION_MINOR)) {
>-		pr_err("Incompatible ABI version");
>+		dev_warn(&ffa_dev->dev, "Incompatible ABI version\n");
> 		goto out;
> 	}
>
>-- 
>LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}
>

Re: [PATCH v5 2/2] tpm_crb_ffa: use dev_xx() macro to print log

[Jarkko Sakkinen]

On Tue, Apr 15, 2025 at 07:50:13PM +0100, Yeoreum Yun wrote:
> Instead of pr_xxx() macro, use dev_xxx() to print log.
> This patch changes some error log level to warn log level when
> the tpm_crb_ffa secure partition doesn't support properly but
> system can run without it.
> (i.e) unsupport of direct message ABI or unsupported ABI version
> 
> Signed-off-by: Yeoreum Yun <yeoreum.yun@arm.com>
> ---
>  drivers/char/tpm/tpm_crb_ffa.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/char/tpm/tpm_crb_ffa.c b/drivers/char/tpm/tpm_crb_ffa.c
> index fed775cf53ab..66b38b2cbdd5 100644
> --- a/drivers/char/tpm/tpm_crb_ffa.c
> +++ b/drivers/char/tpm/tpm_crb_ffa.c
> @@ -303,7 +303,7 @@ static int tpm_crb_ffa_probe(struct ffa_device *ffa_dev)
>  
>  	if (!ffa_partition_supports_direct_recv(ffa_dev) &&
>  	    !ffa_partition_supports_direct_req2_recv(ffa_dev)) {
> -		pr_err("TPM partition doesn't support direct message receive.\n");
> +		dev_warn(&ffa_dev->dev, "partition doesn't support direct message receive.\n");
>  		return -EINVAL;
>  	}
>  
> @@ -324,17 +324,17 @@ static int tpm_crb_ffa_probe(struct ffa_device *ffa_dev)
>  	rc = tpm_crb_ffa_get_interface_version(&tpm_crb_ffa->major_version,
>  					       &tpm_crb_ffa->minor_version);
>  	if (rc) {
> -		pr_err("failed to get crb interface version. rc:%d", rc);
> +		dev_err(&ffa_dev->dev, "failed to get crb interface version. rc:%d\n", rc);
>  		goto out;
>  	}
>  
> -	pr_info("ABI version %u.%u", tpm_crb_ffa->major_version,
> +	dev_info(&ffa_dev->dev, "ABI version %u.%u\n", tpm_crb_ffa->major_version,
>  		tpm_crb_ffa->minor_version);
>  
>  	if (tpm_crb_ffa->major_version != CRB_FFA_VERSION_MAJOR ||
>  	    (tpm_crb_ffa->minor_version > 0 &&
>  	    tpm_crb_ffa->minor_version < CRB_FFA_VERSION_MINOR)) {
> -		pr_err("Incompatible ABI version");
> +		dev_warn(&ffa_dev->dev, "Incompatible ABI version\n");
>  		goto out;
>  	}
>  
> -- 
> LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}
> 
> 

Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>

BR, Jarkko