Re: [PATCH] drm/xe/huc: Use GT oriented error messages in xe_huc.c

[Michal Wajdeczko <michal.wajdeczko@intel.com>]

On 21.06.2024 19:47, Matthew Brost wrote:
> On Fri, Jun 21, 2024 at 07:25:22PM +0200, Michal Wajdeczko wrote:
>> If applicable, we prefer GT oriented dmesg messages. Update all
>> HuC related messages and use more user friendly error codes.
>>
>> Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
>> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
>> ---
>>  drivers/gpu/drm/xe/xe_huc.c | 22 +++++++++++-----------
>>  1 file changed, 11 insertions(+), 11 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/xe/xe_huc.c b/drivers/gpu/drm/xe/xe_huc.c
>> index c88761fe31c9..bec4366e5513 100644
>> --- a/drivers/gpu/drm/xe/xe_huc.c
>> +++ b/drivers/gpu/drm/xe/xe_huc.c
>> @@ -18,6 +18,7 @@
>>  #include "xe_force_wake.h"
>>  #include "xe_gsc_submit.h"
>>  #include "xe_gt.h"
>> +#include "xe_gt_printk.h"
>>  #include "xe_guc.h"
>>  #include "xe_map.h"
>>  #include "xe_mmio.h"
>> @@ -107,7 +108,7 @@ int xe_huc_init(struct xe_huc *huc)
>>  	return 0;
>>  
>>  out:
>> -	drm_err(&xe->drm, "HuC init failed with %d", ret);
>> +	xe_gt_err(gt, "HuC: initialization failed: %pe\n", ERR_PTR(ret));
> 
> Why the ERR_PTR change? I think this make everything less clear. Or does
> %pe convert this back to an easily readable value?

yes, instead of raw error value:

	"... [drm] *ERROR* HuC init failed with -5"

it will print error name:

	"... [drm] *ERROR* GT0: HuC: initialization failed: -EIO"

see [1] for more details

[1] https://elixir.bootlin.com/linux/latest/source/lib/Kconfig.debug#L191

> 
> Matt
> 
>>  	return ret;
>>  }
>>  
>> @@ -195,14 +196,14 @@ static int huc_auth_via_gsccs(struct xe_huc *huc)
>>  	} while (--retry && err == -EBUSY);
>>  
>>  	if (err) {
>> -		drm_err(&xe->drm, "failed to submit GSC request to auth: %d\n", err);
>> +		xe_gt_err(gt, "HuC: failed to submit GSC request to auth: %pe\n", ERR_PTR(err));
>>  		return err;
>>  	}
>>  
>>  	err = xe_gsc_read_out_header(xe, &pkt->vmap, PXP43_HUC_AUTH_INOUT_SIZE,
>>  				     sizeof(struct pxp43_huc_auth_out), &rd_offset);
>>  	if (err) {
>> -		drm_err(&xe->drm, "HuC: invalid GSC reply for auth (err=%d)\n", err);
>> +		xe_gt_err(gt, "HuC: invalid GSC reply for auth: %pe\n", ERR_PTR(err));
>>  		return err;
>>  	}
>>  
>> @@ -213,7 +214,7 @@ static int huc_auth_via_gsccs(struct xe_huc *huc)
>>  	 */
>>  	out_status = huc_auth_msg_rd(xe, &pkt->vmap, rd_offset, header.status);
>>  	if (out_status != PXP_STATUS_SUCCESS && out_status != PXP_STATUS_OP_NOT_PERMITTED) {
>> -		drm_err(&xe->drm, "auth failed with GSC error = 0x%x\n", out_status);
>> +		xe_gt_err(gt, "HuC: authentication failed with GSC error = %#x\n", out_status);
>>  		return -EIO;
>>  	}
>>  
>> @@ -242,7 +243,6 @@ bool xe_huc_is_authenticated(struct xe_huc *huc, enum xe_huc_auth_types type)
>>  
>>  int xe_huc_auth(struct xe_huc *huc, enum xe_huc_auth_types type)
>>  {
>> -	struct xe_device *xe = huc_to_xe(huc);
>>  	struct xe_gt *gt = huc_to_gt(huc);
>>  	struct xe_guc *guc = huc_to_guc(huc);
>>  	int ret;
>> @@ -272,26 +272,26 @@ int xe_huc_auth(struct xe_huc *huc, enum xe_huc_auth_types type)
>>  		return -EINVAL;
>>  	}
>>  	if (ret) {
>> -		drm_err(&xe->drm, "Failed to trigger HuC auth via %s: %d\n",
>> -			huc_auth_modes[type].name, ret);
>> +		xe_gt_err(gt, "HuC: failed to trigger auth via %s: %pe\n",
>> +			  huc_auth_modes[type].name, ERR_PTR(ret));
>>  		goto fail;
>>  	}
>>  
>>  	ret = xe_mmio_wait32(gt, huc_auth_modes[type].reg, huc_auth_modes[type].val,
>>  			     huc_auth_modes[type].val, 100000, NULL, false);
>>  	if (ret) {
>> -		drm_err(&xe->drm, "HuC: Firmware not verified %d\n", ret);
>> +		xe_gt_err(gt, "HuC: firmware not verified: %pe\n", ERR_PTR(ret));
>>  		goto fail;
>>  	}
>>  
>>  	xe_uc_fw_change_status(&huc->fw, XE_UC_FIRMWARE_RUNNING);
>> -	drm_dbg(&xe->drm, "HuC authenticated via %s\n", huc_auth_modes[type].name);
>> +	xe_gt_dbg(gt, "HuC: authenticated via %s\n", huc_auth_modes[type].name);
>>  
>>  	return 0;
>>  
>>  fail:
>> -	drm_err(&xe->drm, "HuC: Auth via %s failed: %d\n",
>> -		huc_auth_modes[type].name, ret);
>> +	xe_gt_err(gt, "HuC: authentication via %s failed: %pe\n",
>> +		  huc_auth_modes[type].name, ERR_PTR(ret));
>>  	xe_uc_fw_change_status(&huc->fw, XE_UC_FIRMWARE_LOAD_FAIL);
>>  
>>  	return ret;
>> -- 
>> 2.43.0
>>