Re: [Intel-gfx] [PATCH 05/14] drm/i915/guc/slpc: Allocate, initialize and release SLPC

["Belgaumkar, Vinay" <vinay.belgaumkar@intel.com>]

On 7/21/2021 10:26 AM, Michal Wajdeczko wrote:
> 
> 
> On 21.07.2021 18:11, Vinay Belgaumkar wrote:
>> Allocate data structures for SLPC and functions for
>> initializing on host side.
>>
>> v2: Address review comments (Michal W)
>>
>> Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
>> Signed-off-by: Sundaresan Sujaritha <sujaritha.sundaresan@intel.com>
>> ---
>>   drivers/gpu/drm/i915/gt/uc/intel_guc.c        | 11 ++++++
>>   drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c   | 36 ++++++++++++++++++-
>>   drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h   |  1 +
>>   .../gpu/drm/i915/gt/uc/intel_guc_slpc_types.h |  3 ++
>>   4 files changed, 50 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
>> index fcccb103a21a..686cb978662d 100644
>> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.c
>> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
>> @@ -337,6 +337,12 @@ int intel_guc_init(struct intel_guc *guc)
>>   			goto err_ct;
>>   	}
>>   
>> +	if (intel_guc_slpc_is_used(guc)) {
>> +		ret = intel_guc_slpc_init(&guc->slpc);
>> +		if (ret)
>> +			goto err_submission;
>> +	}
>> +
>>   	/* now that everything is perma-pinned, initialize the parameters */
>>   	guc_init_params(guc);
>>   
>> @@ -347,6 +353,8 @@ int intel_guc_init(struct intel_guc *guc)
>>   
>>   	return 0;
>>   
>> +err_submission:
>> +	intel_guc_submission_fini(guc);
>>   err_ct:
>>   	intel_guc_ct_fini(&guc->ct);
>>   err_ads:
>> @@ -369,6 +377,9 @@ void intel_guc_fini(struct intel_guc *guc)
>>   
>>   	i915_ggtt_disable_guc(gt->ggtt);
>>   
>> +	if (intel_guc_slpc_is_used(guc))
>> +		intel_guc_slpc_fini(&guc->slpc);
>> +
>>   	if (intel_guc_submission_is_used(guc))
>>   		intel_guc_submission_fini(guc);
>>   
>> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
>> index d9feb430ce35..a99d727b5bf0 100644
>> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
>> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
>> @@ -12,6 +12,16 @@ static inline struct intel_guc *slpc_to_guc(struct intel_guc_slpc *slpc)
>>   	return container_of(slpc, struct intel_guc, slpc);
>>   }
>>   
>> +static inline struct intel_gt *slpc_to_gt(struct intel_guc_slpc *slpc)
>> +{
>> +	return guc_to_gt(slpc_to_guc(slpc));
>> +}
>> +
>> +static inline struct drm_i915_private *slpc_to_i915(struct intel_guc_slpc *slpc)
>> +{
>> +	return (slpc_to_gt(slpc))->i915;
> 
> redundant ( )

ok.

> 
>> +}
>> +
>>   static bool __detect_slpc_supported(struct intel_guc *guc)
>>   {
>>   	/* GuC SLPC is unavailable for pre-Gen12 */
>> @@ -35,9 +45,29 @@ void intel_guc_slpc_init_early(struct intel_guc_slpc *slpc)
>>   	guc->slpc_selected = __guc_slpc_selected(guc);
>>   }
>>   
>> +static int slpc_shared_data_init(struct intel_guc_slpc *slpc)
>> +{
>> +	struct intel_guc *guc = slpc_to_guc(slpc);
>> +	struct drm_i915_private *i915 = slpc_to_i915(slpc);
>> +	u32 size = PAGE_ALIGN(sizeof(struct slpc_shared_data));
>> +	int err;
>> +
>> +	err = intel_guc_allocate_and_map_vma(guc, size, &slpc->vma, (void **)&slpc->vaddr);
>> +	if (unlikely(err)) {
>> +		drm_err(&i915->drm,
>> +			"Failed to allocate SLPC struct (err=%pe)\n",
>> +			ERR_PTR(err));
>> +		return err;
>> +	}
>> +
>> +	return err;
>> +}
>> +
>>   int intel_guc_slpc_init(struct intel_guc_slpc *slpc)
>>   {
>> -	return 0;
>> +	GEM_BUG_ON(slpc->vma);
>> +
>> +	return slpc_shared_data_init(slpc);
>>   }
>>   
>>   /*
>> @@ -60,4 +90,8 @@ int intel_guc_slpc_enable(struct intel_guc_slpc *slpc)
>>   
>>   void intel_guc_slpc_fini(struct intel_guc_slpc *slpc)
>>   {
>> +	if (!slpc->vma)
>> +		return;
>> +
>> +	i915_vma_unpin_and_release(&slpc->vma, I915_VMA_RELEASE_MAP);
>>   }
>> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h
>> index c3b0ad7f0f93..f02249ff5f1b 100644
>> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h
>> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h
>> @@ -8,6 +8,7 @@
>>   
>>   #include "intel_guc_submission.h"
>>   #include "intel_guc_slpc_types.h"
>> +#include "abi/guc_actions_slpc_abi.h"
> 
> is this is needed here ?
> maybe abi.h could be included only in slcp.c ?

ok, removed.

> 
>>   
>>   static inline bool intel_guc_slpc_is_supported(struct intel_guc *guc)
>>   {
>> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h
>> index b85148265b1f..214a449e78f2 100644
>> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h
>> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h
>> @@ -7,9 +7,12 @@
>>   #define _INTEL_GUC_SLPC_TYPES_H_
>>   
>>   #include <linux/types.h>
>> +#include "abi/guc_actions_slpc_abi.h"
> 
> for below pointers you don't need this header(s) to be included

ok.
Thanks,
Vinay.
> 
> Michal
> 
>>   
>>   struct intel_guc_slpc {
>>   
>> +	struct i915_vma *vma;
>> +	struct slpc_shared_data *vaddr;
>>   };
>>   
>>   #endif
>>