diff mbox series

drm/i915/pxp: limit drm-errors or warning on firmware API failures

Message ID 20230204054852.592917-1-alan.previn.teres.alexis@intel.com (mailing list archive)
State New, archived
Headers show
Series drm/i915/pxp: limit drm-errors or warning on firmware API failures | expand

Commit Message

Alan Previn Feb. 4, 2023, 5:48 a.m. UTC 
MESA driver is creating protected context on every driver handle
creation to query caps bits for app. So when running CI tests,
they are observing hundreds of drm_errors when enabling PXP
in .config but using SOC fusing or BIOS configuration that cannot
support PXP sessions.

The fixes tag referenced below was to resolve a related issue
where we wanted to silence error messages, but that case was due
to outdated IFWI (firmware) that definitely needed an upgrade and
was, at that point, considered a one-off case as opposed to today's
realization that default CI was enabling PXP in kernel config for
all testing.

So with this patch, let's strike a balance between issues that is
critical but are root-caused from HW/platform gaps (louder drm-warn
but just ONCE) vs other cases where it could also come from session
state machine (which cannot be a WARN_ONCE since it can be triggered
due to runtime operation events).

Let's use helpers for these so as more functions are added in future
features / HW (or as FW designers continue to bless upstreaming of
the error codes and meanings), we only need to update the helpers.

NOTE: Don't completely remove FW errors (via drm_debug) or else cusomer
apps that really needs to know that content protection failed won't
be aware of it.

Fixes: b762787bf767 ("drm/i915/pxp: Use drm_dbg if arb session failed due to fw version")
Signed-off-by: Alan Previn <alan.previn.teres.alexis@intel.com>
---
 .../i915/pxp/intel_pxp_cmd_interface_cmn.h    |  3 +
 drivers/gpu/drm/i915/pxp/intel_pxp_session.c  |  2 +-
 drivers/gpu/drm/i915/pxp/intel_pxp_tee.c      | 73 +++++++++++++++----
 3 files changed, 64 insertions(+), 14 deletions(-)

Comments

Daniele Ceraolo Spurio March 3, 2023, 7:34 p.m. UTC | #1 
On 2/3/2023 9:48 PM, Alan Previn wrote:
> MESA driver is creating protected context on every driver handle
> creation to query caps bits for app. So when running CI tests,
> they are observing hundreds of drm_errors when enabling PXP
> in .config but using SOC fusing or BIOS configuration that cannot
> support PXP sessions.
>
> The fixes tag referenced below was to resolve a related issue
> where we wanted to silence error messages, but that case was due
> to outdated IFWI (firmware) that definitely needed an upgrade and
> was, at that point, considered a one-off case as opposed to today's
> realization that default CI was enabling PXP in kernel config for
> all testing.
>
> So with this patch, let's strike a balance between issues that is
> critical but are root-caused from HW/platform gaps (louder drm-warn
> but just ONCE) vs other cases where it could also come from session
> state machine (which cannot be a WARN_ONCE since it can be triggered
> due to runtime operation events).
>
> Let's use helpers for these so as more functions are added in future
> features / HW (or as FW designers continue to bless upstreaming of
> the error codes and meanings), we only need to update the helpers.
>
> NOTE: Don't completely remove FW errors (via drm_debug) or else cusomer
> apps that really needs to know that content protection failed won't
> be aware of it.
>
> Fixes: b762787bf767 ("drm/i915/pxp: Use drm_dbg if arb session failed due to fw version")
> Signed-off-by: Alan Previn <alan.previn.teres.alexis@intel.com>
> ---
>   .../i915/pxp/intel_pxp_cmd_interface_cmn.h    |  3 +
>   drivers/gpu/drm/i915/pxp/intel_pxp_session.c  |  2 +-
>   drivers/gpu/drm/i915/pxp/intel_pxp_tee.c      | 73 +++++++++++++++----
>   3 files changed, 64 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_cmd_interface_cmn.h b/drivers/gpu/drm/i915/pxp/intel_pxp_cmd_interface_cmn.h
> index ae9b151b7cb7..6f6541d5e49a 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp_cmd_interface_cmn.h
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_cmd_interface_cmn.h
> @@ -18,6 +18,9 @@
>   enum pxp_status {
>   	PXP_STATUS_SUCCESS = 0x0,
>   	PXP_STATUS_ERROR_API_VERSION = 0x1002,
> +	PXP_STATUS_NOT_READY = 0x100e,
> +	PXP_STATUS_PLATFCONFIG_KF1_NOVERIF = 0x101a,
> +	PXP_STATUS_PLATFCONFIG_KF1_BAD = 0x101f,
>   	PXP_STATUS_OP_NOT_PERMITTED = 0x4013
>   };
>   
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_session.c b/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
> index 448cacb0465d..7de849cb6c47 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
> @@ -74,7 +74,7 @@ static int pxp_create_arb_session(struct intel_pxp *pxp)
>   
>   	ret = pxp_wait_for_session_state(pxp, ARB_SESSION, true);
>   	if (ret) {
> -		drm_err(&gt->i915->drm, "arb session failed to go in play\n");
> +		drm_dbg(&gt->i915->drm, "arb session failed to go in play\n");
>   		return ret;
>   	}
>   	drm_dbg(&gt->i915->drm, "PXP ARB session is alive\n");
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c b/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
> index d9d248b48093..2d3bcff93da3 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
> @@ -19,6 +19,37 @@
>   #include "intel_pxp_tee.h"
>   #include "intel_pxp_types.h"
>   
> +static bool
> +is_fw_err_platform_config(u32 type)
> +{
> +	switch (type) {
> +	case PXP_STATUS_ERROR_API_VERSION:
> +	case PXP_STATUS_PLATFCONFIG_KF1_NOVERIF:
> +	case PXP_STATUS_PLATFCONFIG_KF1_BAD:
> +		return true;
> +	default:
> +		break;
> +	}
> +	return false;
> +}
> +
> +static const char *
> +fw_err_to_string(u32 type)
> +{
> +	switch (type) {
> +	case PXP_STATUS_ERROR_API_VERSION:
> +		return "ERR_API_VERSION";
> +	case PXP_STATUS_NOT_READY:
> +		return "ERR_NOT_READY";
> +	case PXP_STATUS_PLATFCONFIG_KF1_NOVERIF:
> +	case PXP_STATUS_PLATFCONFIG_KF1_BAD:
> +		return "ERR_PLATFORM_CONFIG";
> +	default:
> +		break;
> +	}
> +	return NULL;
> +}
> +
>   static int intel_pxp_tee_io_message(struct intel_pxp *pxp,
>   				    void *msg_in, u32 msg_in_size,
>   				    void *msg_out, u32 msg_out_max_size,
> @@ -307,15 +338,21 @@ int intel_pxp_tee_cmd_create_arb_session(struct intel_pxp *pxp,
>   				       &msg_out, sizeof(msg_out),
>   				       NULL);
>   
> -	if (ret)
> -		drm_err(&i915->drm, "Failed to send tee msg ret=[%d]\n", ret);
> -	else if (msg_out.header.status == PXP_STATUS_ERROR_API_VERSION)
> -		drm_dbg(&i915->drm, "PXP firmware version unsupported, requested: "
> -			"CMD-ID-[0x%08x] on API-Ver-[0x%08x]\n",
> -			msg_in.header.command_id, msg_in.header.api_version);
> -	else if (msg_out.header.status != 0x0)
> -		drm_warn(&i915->drm, "PXP firmware failed arb session init request ret=[0x%08x]\n",
> -			 msg_out.header.status);
> +	if (ret) {
> +		drm_err(&i915->drm, "Failed to send tee msg init arb session, ret=[%d]\n", ret);
> +	} else if (msg_out.header.status != 0) {
> +		if (is_fw_err_platform_config(msg_out.header.status))
> +			drm_WARN_ONCE(&i915->drm, true,
> +				      "PXP init-arb-session-%d failed due to BIOS/SOC:0x%08x:%s\n",
> +				      (int)arb_session_id, msg_out.header.status,
> +				      fw_err_to_string(msg_out.header.status));
> +		else
> +			drm_dbg(&i915->drm, "PXP init-arb-session--%d failed 0x%08x:%st:\n"

I think we usually prefer to emit 2 separate drm_dbg instead of having a 
newline in the middle

> +				"CMD-ID-[0x%08x]:API-Ver-[0x%08x]\n",
> +				(int)arb_session_id, msg_out.header.status,

Isn't arb_session_id already an int? why the need to cast it?

> +				fw_err_to_string(msg_out.header.status),
> +				msg_in.header.command_id, msg_in.header.api_version);
> +	}
>   
>   	return ret;
>   }
> @@ -347,10 +384,20 @@ void intel_pxp_tee_end_arb_fw_session(struct intel_pxp *pxp, u32 session_id)
>   	if ((ret || msg_out.header.status != 0x0) && ++trials < 3)
>   		goto try_again;
>   
> -	if (ret)
> +	if (ret) {
>   		drm_err(&i915->drm, "Failed to send tee msg for inv-stream-key-%d, ret=[%d]\n",
>   			session_id, ret);
> -	else if (msg_out.header.status != 0x0)
> -		drm_warn(&i915->drm, "PXP firmware failed inv-stream-key-%d with status 0x%08x\n",
> -			 session_id, msg_out.header.status);
> +	} else if (msg_out.header.status != 0) {
> +		if (is_fw_err_platform_config(msg_out.header.status))
> +			drm_WARN_ONCE(&i915->drm, true,
> +				      "PXP inv-stream-key-%d failed due to BIOS/SOC :0x%08x:%s\n",
> +				      (int)session_id, msg_out.header.status,

This time this is a u32, so why not just use %u?

Patch LGTM apart from these nits.

Daniele

> +				      fw_err_to_string(msg_out.header.status));
> +		else
> +			drm_dbg(&i915->drm, "PXP inv-stream-key-%d failed 0x%08x:%s:\n"
> +				"CMD-ID-[0x%08x]:API-Ver-[0x%08x]\n",
> +				(int)session_id, msg_out.header.status,
> +				fw_err_to_string(msg_out.header.status),
> +				msg_in.header.command_id, msg_in.header.api_version);
> +	}
>   }
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_cmd_interface_cmn.h b/drivers/gpu/drm/i915/pxp/intel_pxp_cmd_interface_cmn.h
index ae9b151b7cb7..6f6541d5e49a 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_cmd_interface_cmn.h
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_cmd_interface_cmn.h
@@ -18,6 +18,9 @@ 
 enum pxp_status {
 	PXP_STATUS_SUCCESS = 0x0,
 	PXP_STATUS_ERROR_API_VERSION = 0x1002,
+	PXP_STATUS_NOT_READY = 0x100e,
+	PXP_STATUS_PLATFCONFIG_KF1_NOVERIF = 0x101a,
+	PXP_STATUS_PLATFCONFIG_KF1_BAD = 0x101f,
 	PXP_STATUS_OP_NOT_PERMITTED = 0x4013
 };
 
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_session.c b/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
index 448cacb0465d..7de849cb6c47 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
@@ -74,7 +74,7 @@  static int pxp_create_arb_session(struct intel_pxp *pxp)
 
 	ret = pxp_wait_for_session_state(pxp, ARB_SESSION, true);
 	if (ret) {
-		drm_err(&gt->i915->drm, "arb session failed to go in play\n");
+		drm_dbg(&gt->i915->drm, "arb session failed to go in play\n");
 		return ret;
 	}
 	drm_dbg(&gt->i915->drm, "PXP ARB session is alive\n");
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c b/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
index d9d248b48093..2d3bcff93da3 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
@@ -19,6 +19,37 @@ 
 #include "intel_pxp_tee.h"
 #include "intel_pxp_types.h"
 
+static bool
+is_fw_err_platform_config(u32 type)
+{
+	switch (type) {
+	case PXP_STATUS_ERROR_API_VERSION:
+	case PXP_STATUS_PLATFCONFIG_KF1_NOVERIF:
+	case PXP_STATUS_PLATFCONFIG_KF1_BAD:
+		return true;
+	default:
+		break;
+	}
+	return false;
+}
+
+static const char *
+fw_err_to_string(u32 type)
+{
+	switch (type) {
+	case PXP_STATUS_ERROR_API_VERSION:
+		return "ERR_API_VERSION";
+	case PXP_STATUS_NOT_READY:
+		return "ERR_NOT_READY";
+	case PXP_STATUS_PLATFCONFIG_KF1_NOVERIF:
+	case PXP_STATUS_PLATFCONFIG_KF1_BAD:
+		return "ERR_PLATFORM_CONFIG";
+	default:
+		break;
+	}
+	return NULL;
+}
+
 static int intel_pxp_tee_io_message(struct intel_pxp *pxp,
 				    void *msg_in, u32 msg_in_size,
 				    void *msg_out, u32 msg_out_max_size,
@@ -307,15 +338,21 @@  int intel_pxp_tee_cmd_create_arb_session(struct intel_pxp *pxp,
 				       &msg_out, sizeof(msg_out),
 				       NULL);
 
-	if (ret)
-		drm_err(&i915->drm, "Failed to send tee msg ret=[%d]\n", ret);
-	else if (msg_out.header.status == PXP_STATUS_ERROR_API_VERSION)
-		drm_dbg(&i915->drm, "PXP firmware version unsupported, requested: "
-			"CMD-ID-[0x%08x] on API-Ver-[0x%08x]\n",
-			msg_in.header.command_id, msg_in.header.api_version);
-	else if (msg_out.header.status != 0x0)
-		drm_warn(&i915->drm, "PXP firmware failed arb session init request ret=[0x%08x]\n",
-			 msg_out.header.status);
+	if (ret) {
+		drm_err(&i915->drm, "Failed to send tee msg init arb session, ret=[%d]\n", ret);
+	} else if (msg_out.header.status != 0) {
+		if (is_fw_err_platform_config(msg_out.header.status))
+			drm_WARN_ONCE(&i915->drm, true,
+				      "PXP init-arb-session-%d failed due to BIOS/SOC:0x%08x:%s\n",
+				      (int)arb_session_id, msg_out.header.status,
+				      fw_err_to_string(msg_out.header.status));
+		else
+			drm_dbg(&i915->drm, "PXP init-arb-session--%d failed 0x%08x:%st:\n"
+				"CMD-ID-[0x%08x]:API-Ver-[0x%08x]\n",
+				(int)arb_session_id, msg_out.header.status,
+				fw_err_to_string(msg_out.header.status),
+				msg_in.header.command_id, msg_in.header.api_version);
+	}
 
 	return ret;
 }
@@ -347,10 +384,20 @@  void intel_pxp_tee_end_arb_fw_session(struct intel_pxp *pxp, u32 session_id)
 	if ((ret || msg_out.header.status != 0x0) && ++trials < 3)
 		goto try_again;
 
-	if (ret)
+	if (ret) {
 		drm_err(&i915->drm, "Failed to send tee msg for inv-stream-key-%d, ret=[%d]\n",
 			session_id, ret);
-	else if (msg_out.header.status != 0x0)
-		drm_warn(&i915->drm, "PXP firmware failed inv-stream-key-%d with status 0x%08x\n",
-			 session_id, msg_out.header.status);
+	} else if (msg_out.header.status != 0) {
+		if (is_fw_err_platform_config(msg_out.header.status))
+			drm_WARN_ONCE(&i915->drm, true,
+				      "PXP inv-stream-key-%d failed due to BIOS/SOC :0x%08x:%s\n",
+				      (int)session_id, msg_out.header.status,
+				      fw_err_to_string(msg_out.header.status));
+		else
+			drm_dbg(&i915->drm, "PXP inv-stream-key-%d failed 0x%08x:%s:\n"
+				"CMD-ID-[0x%08x]:API-Ver-[0x%08x]\n",
+				(int)session_id, msg_out.header.status,
+				fw_err_to_string(msg_out.header.status),
+				msg_in.header.command_id, msg_in.header.api_version);
+	}
 }