[PATCH 06/16] drm/i915/guc/slpc: Allocate, initialize and release slpc

[Vinay Belgaumkar]

Allocate data structures for SLPC and functions for
initializing on host side.

Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar at intel.com>
Signed-off-by: Sundaresan Sujaritha <sujaritha.sundaresan at 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 | 20 ++++++++++++
 3 files changed, 66 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 9d61b2d54de4..82863a9bc8e8 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
@@ -336,6 +336,12 @@ 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);
 
@@ -346,6 +352,8 @@ 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:
@@ -368,6 +376,9 @@ 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 c1f569d2300d..94e2f19951aa 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
@@ -4,11 +4,41 @@
  * Copyright © 2020 Intel Corporation
  */
 
+#include <asm/msr-index.h>
+
+#include "gt/intel_gt.h"
+#include "gt/intel_rps.h"
+
+#include "i915_drv.h"
 #include "intel_guc_slpc.h"
+#include "intel_pm.h"
+
+static inline struct intel_guc *slpc_to_guc(struct intel_guc_slpc *slpc)
+{
+	return container_of(slpc, struct intel_guc, slpc);
+}
+
+static int slpc_shared_data_init(struct intel_guc_slpc *slpc)
+{
+	struct intel_guc *guc = slpc_to_guc(slpc);
+	int err;
+	u32 size = PAGE_ALIGN(sizeof(struct slpc_shared_data));
+
+	err = intel_guc_allocate_and_map_vma(guc, size, &slpc->vma, &slpc->vaddr);
+	if (unlikely(err)) {
+		DRM_ERROR("Failed to allocate slpc struct (err=%d)\n", err);
+		i915_vma_unpin_and_release(&slpc->vma, I915_VMA_RELEASE_MAP);
+		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);
 }
 
 /*
@@ -31,4 +61,8 @@ 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 98036459a1a3..a2643b904165 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h
@@ -3,12 +3,32 @@
  *
  * Copyright © 2020 Intel Corporation
  */
+
 #ifndef _INTEL_GUC_SLPC_H_
 #define _INTEL_GUC_SLPC_H_
 
+#include <linux/mutex.h>
 #include "intel_guc_slpc_fwif.h"
 
 struct intel_guc_slpc {
+	/*Protects access to vma and SLPC actions */
+	struct i915_vma *vma;
+	void *vaddr;
+
+	/* platform frequency limits */
+	u32 min_freq;
+	u32 rp0_freq;
+	u32 rp1_freq;
+
+	/* frequency softlimits */
+	u32 min_freq_softlimit;
+	u32 max_freq_softlimit;
+
+	struct {
+		u32 param_id;
+		u32 param_value;
+		u32 param_override;
+	} debug;
 };
 
 int intel_guc_slpc_init(struct intel_guc_slpc *slpc);
-- 
2.25.0