Re: [PATCH v4 2/6] drm/i915/pxp: Make intel_pxp_is_enabled implicitly sort PXP-owning-GT

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On Wed, Nov 16, 2022 at 04:30:14PM -0800, Alan Previn wrote:
> Make intel_pxp_is_enabled a global check and implicitly find the
> PXP-owning-GT.
> 
> PXP feature support is a device-config flag. In preparation for MTL
> PXP control-context shall reside on of the two GT's. That said,
> update intel_pxp_is_enabled to take in i915 as its input and internally
> find the right gt to check if PXP is enabled so its transparent to
> callers of this functions.
> 
> However we also need to expose the per-gt variation of this internal
> pxp files to use (like what intel_pxp_enabled was prior) so also expose
> a new intel_gtpxp_is_enabled function for replacement.
> 
> Signed-off-by: Alan Previn <alan.previn.teres.alexis@xxxxxxxxx>
> ---
>  drivers/gpu/drm/i915/gem/i915_gem_context.c  |  2 +-
>  drivers/gpu/drm/i915/gem/i915_gem_create.c   |  2 +-
>  drivers/gpu/drm/i915/pxp/intel_pxp.c         | 28 ++++++++++++++++++--
>  drivers/gpu/drm/i915/pxp/intel_pxp.h         |  4 ++-
>  drivers/gpu/drm/i915/pxp/intel_pxp_cmd.c     |  2 +-
>  drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c |  2 +-
>  drivers/gpu/drm/i915/pxp/intel_pxp_irq.c     |  2 +-
>  drivers/gpu/drm/i915/pxp/intel_pxp_pm.c      |  8 +++---
>  drivers/gpu/drm/i915/pxp/intel_pxp_tee.c     |  4 +--
>  9 files changed, 40 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c
> index 7f2831efc798..c123f4847b19 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
> @@ -257,7 +257,7 @@ static int proto_context_set_protected(struct drm_i915_private *i915,
>  
>  	if (!protected) {
>  		pc->uses_protected_content = false;
> -	} else if (!intel_pxp_is_enabled(&to_gt(i915)->pxp)) {
> +	} else if (!intel_pxp_is_enabled(i915)) {

if we are asking about pxp we should pass pxp, not i915...

>  		ret = -ENODEV;
>  	} else if ((pc->user_flags & BIT(UCONTEXT_RECOVERABLE)) ||
>  		   !(pc->user_flags & BIT(UCONTEXT_BANNABLE))) {
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_create.c b/drivers/gpu/drm/i915/gem/i915_gem_create.c
> index 33673fe7ee0a..e44803f9bec4 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_create.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_create.c
> @@ -384,7 +384,7 @@ static int ext_set_protected(struct i915_user_extension __user *base, void *data
>  	if (ext.flags)
>  		return -EINVAL;
>  
> -	if (!intel_pxp_is_enabled(&to_gt(ext_data->i915)->pxp))
> +	if (!intel_pxp_is_enabled(ext_data->i915))
>  		return -ENODEV;
>  
>  	ext_data->flags |= I915_BO_PROTECTED;
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.c b/drivers/gpu/drm/i915/pxp/intel_pxp.c
> index d993e752bd36..88105101af79 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp.c
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp.c
> @@ -9,6 +9,7 @@
>  #include "intel_pxp_tee.h"
>  #include "gem/i915_gem_context.h"
>  #include "gt/intel_context.h"
> +#include "gt/intel_gt.h"
>  #include "i915_drv.h"
>  
>  /**
> @@ -58,11 +59,34 @@ bool intel_pxp_supported_on_gt(const struct intel_pxp *pxp)
>  		INTEL_INFO((pxp_to_gt(pxp))->i915)->has_pxp && VDBOX_MASK(pxp_to_gt(pxp)));
>  }
>  
> -bool intel_pxp_is_enabled(const struct intel_pxp *pxp)
> +bool intel_pxp_is_enabled_on_gt(const struct intel_pxp *pxp)
>  {
>  	return pxp->ce;
>  }
>  
> +static struct intel_gt *i915_to_pxp_gt(struct drm_i915_private *i915)
> +{
> +	struct intel_gt *gt = NULL;
> +	int i = 0;
> +
> +	for_each_gt(gt, i915, i) {
> +		/* There can be only one GT that supports PXP */
> +		if (intel_pxp_supported_on_gt(&gt->pxp))
> +			return gt;
> +	}
> +	return NULL;
> +}
> +
> +bool intel_pxp_is_enabled(struct drm_i915_private *i915)
> +{
> +	struct intel_gt *gt = i915_to_pxp_gt(i915);
> +
> +	if (!gt)
> +		return false;
> +
> +	return intel_pxp_is_enabled_on_gt(&gt->pxp);
> +}
> +
>  bool intel_pxp_is_active(const struct intel_pxp *pxp)
>  {
>  	return pxp->arb_is_valid;
> @@ -216,7 +240,7 @@ int intel_pxp_start(struct intel_pxp *pxp)
>  {
>  	int ret = 0;
>  
> -	if (!intel_pxp_is_enabled(pxp))
> +	if (!intel_pxp_is_enabled_on_gt(pxp))
>  		return -ENODEV;
>  
>  	if (wait_for(pxp_component_bound(pxp), 250))
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.h b/drivers/gpu/drm/i915/pxp/intel_pxp.h
> index efa83f9d5e24..3f71b1653f74 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp.h
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp.h
> @@ -11,12 +11,14 @@
>  
>  struct intel_pxp;
>  struct drm_i915_gem_object;
> +struct drm_i915_private;
>  
>  struct intel_gt *pxp_to_gt(const struct intel_pxp *pxp);
>  
>  bool intel_pxp_supported_on_gt(const struct intel_pxp *pxp);
>  
> -bool intel_pxp_is_enabled(const struct intel_pxp *pxp);
> +bool intel_pxp_is_enabled_on_gt(const struct intel_pxp *pxp);
> +bool intel_pxp_is_enabled(struct drm_i915_private *i915);
>  bool intel_pxp_is_active(const struct intel_pxp *pxp);
>  
>  void intel_pxp_init(struct intel_pxp *pxp);
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_cmd.c b/drivers/gpu/drm/i915/pxp/intel_pxp_cmd.c
> index f41e45763d0d..f322a49ebadc 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp_cmd.c
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_cmd.c
> @@ -99,7 +99,7 @@ int intel_pxp_terminate_session(struct intel_pxp *pxp, u32 id)
>  	u32 *cs;
>  	int err = 0;
>  
> -	if (!intel_pxp_is_enabled(pxp))
> +	if (!intel_pxp_is_enabled_on_gt(pxp))
>  		return 0;
>  
>  	rq = i915_request_create(ce);
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c b/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c
> index f0ad6f34624a..4d257055434b 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c
> @@ -18,7 +18,7 @@ static int pxp_info_show(struct seq_file *m, void *data)
>  {
>  	struct intel_pxp *pxp = m->private;
>  	struct drm_printer p = drm_seq_file_printer(m);
> -	bool enabled = intel_pxp_is_enabled(pxp);
> +	bool enabled = intel_pxp_is_enabled_on_gt(pxp);
>  
>  	if (!enabled) {
>  		drm_printf(&p, "pxp disabled\n");
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_irq.c b/drivers/gpu/drm/i915/pxp/intel_pxp_irq.c
> index c28be430718a..d3c697bf9aab 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp_irq.c
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_irq.c
> @@ -22,7 +22,7 @@ void intel_pxp_irq_handler(struct intel_pxp *pxp, u16 iir)
>  {
>  	struct intel_gt *gt = pxp_to_gt(pxp);
>  
> -	if (GEM_WARN_ON(!intel_pxp_is_enabled(pxp)))
> +	if (GEM_WARN_ON(!intel_pxp_is_enabled_on_gt(pxp)))
>  		return;
>  
>  	lockdep_assert_held(gt->irq_lock);
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_pm.c b/drivers/gpu/drm/i915/pxp/intel_pxp_pm.c
> index 6a7d4e2ee138..19ac8828cbde 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp_pm.c
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_pm.c
> @@ -11,7 +11,7 @@
>  
>  void intel_pxp_suspend_prepare(struct intel_pxp *pxp)
>  {
> -	if (!intel_pxp_is_enabled(pxp))
> +	if (!intel_pxp_is_enabled_on_gt(pxp))
>  		return;
>  
>  	pxp->arb_is_valid = false;
> @@ -23,7 +23,7 @@ void intel_pxp_suspend(struct intel_pxp *pxp)
>  {
>  	intel_wakeref_t wakeref;
>  
> -	if (!intel_pxp_is_enabled(pxp))
> +	if (!intel_pxp_is_enabled_on_gt(pxp))
>  		return;
>  
>  	with_intel_runtime_pm(&pxp_to_gt(pxp)->i915->runtime_pm, wakeref) {
> @@ -34,7 +34,7 @@ void intel_pxp_suspend(struct intel_pxp *pxp)
>  
>  void intel_pxp_resume(struct intel_pxp *pxp)
>  {
> -	if (!intel_pxp_is_enabled(pxp))
> +	if (!intel_pxp_is_enabled_on_gt(pxp))
>  		return;
>  
>  	/*
> @@ -50,7 +50,7 @@ void intel_pxp_resume(struct intel_pxp *pxp)
>  
>  void intel_pxp_runtime_suspend(struct intel_pxp *pxp)
>  {
> -	if (!intel_pxp_is_enabled(pxp))
> +	if (!intel_pxp_is_enabled_on_gt(pxp))
>  		return;
>  
>  	pxp->arb_is_valid = false;
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c b/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
> index b0c9170b1395..a5c9c692c20d 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
> @@ -152,7 +152,7 @@ static int i915_pxp_tee_component_bind(struct device *i915_kdev,
>  		return 0;
>  
>  	/* the component is required to fully start the PXP HW */
> -	if (intel_pxp_is_enabled(pxp))
> +	if (intel_pxp_is_enabled_on_gt(pxp))
>  		intel_pxp_init_hw(pxp);
>  
>  	intel_runtime_pm_put(&i915->runtime_pm, wakeref);
> @@ -167,7 +167,7 @@ static void i915_pxp_tee_component_unbind(struct device *i915_kdev,
>  	struct intel_pxp *pxp = i915_dev_to_pxp(i915_kdev);
>  	intel_wakeref_t wakeref;
>  
> -	if (intel_pxp_is_enabled(pxp))
> +	if (intel_pxp_is_enabled_on_gt(pxp))
>  		with_intel_runtime_pm_if_in_use(&i915->runtime_pm, wakeref)
>  			intel_pxp_fini_hw(pxp);
>  
> -- 
> 2.34.1
> 



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