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

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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@xxxxxxxxx>
Signed-off-by: Sundaresan Sujaritha <sujaritha.sundaresan@xxxxxxxxx>
---
  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




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