drm/i915/uc: prefer intel_gt over i915 in GuC/HuC paths

With our HW interface logic moving from i915 to gt and with GuC and HuC
being part of the gt HW, it makes sense to use the intel_gt structure
instead of i915 as our reference object in GuC/HuC paths.

Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190713100016.8026-9-chris@chris-wilson.co.uk
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

9 files changed, 120 insertions, 108 deletions

diff --git a/drivers/gpu/drm/i915/gt/intel_gt.h b/drivers/gpu/drm/i915/gt/intel_gt.h
index 26c94521ad1b..640bb0531f5b 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt.h
@@ -17,6 +17,16 @@ static inline struct intel_gt *uc_to_gt(struct intel_uc *uc)
 	return container_of(uc, struct intel_gt, uc);
 }
 
+static inline struct intel_gt *guc_to_gt(struct intel_guc *guc)
+{
+	return container_of(guc, struct intel_gt, uc.guc);
+}
+
+static inline struct intel_gt *huc_to_gt(struct intel_huc *huc)
+{
+	return container_of(huc, struct intel_gt, uc.huc);
+}
+
 void intel_gt_init_early(struct intel_gt *gt, struct drm_i915_private *i915);
 void intel_gt_init_hw(struct drm_i915_private *i915);
 
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
index 4173b35bf104..6b56f39072b1 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
@@ -22,6 +22,7 @@
  *
  */
 
+#include "gt/intel_gt.h"
 #include "intel_guc.h"
 #include "intel_guc_ads.h"
 #include "intel_guc_submission.h"
@@ -29,16 +30,16 @@
 
 static void gen8_guc_raise_irq(struct intel_guc *guc)
 {
-	struct drm_i915_private *dev_priv = guc_to_i915(guc);
+	struct intel_gt *gt = guc_to_gt(guc);
 
-	I915_WRITE(GUC_SEND_INTERRUPT, GUC_SEND_TRIGGER);
+	intel_uncore_write(gt->uncore, GUC_SEND_INTERRUPT, GUC_SEND_TRIGGER);
 }
 
 static void gen11_guc_raise_irq(struct intel_guc *guc)
 {
-	struct drm_i915_private *dev_priv = guc_to_i915(guc);
+	struct intel_gt *gt = guc_to_gt(guc);
 
-	I915_WRITE(GEN11_GUC_HOST_INTERRUPT, 0);
+	intel_uncore_write(gt->uncore, GEN11_GUC_HOST_INTERRUPT, 0);
 }
 
 static inline i915_reg_t guc_send_reg(struct intel_guc *guc, u32 i)
@@ -52,11 +53,11 @@ static inline i915_reg_t guc_send_reg(struct intel_guc *guc, u32 i)
 
 void intel_guc_init_send_regs(struct intel_guc *guc)
 {
-	struct drm_i915_private *dev_priv = guc_to_i915(guc);
+	struct intel_gt *gt = guc_to_gt(guc);
 	enum forcewake_domains fw_domains = 0;
 	unsigned int i;
 
-	if (INTEL_GEN(dev_priv) >= 11) {
+	if (INTEL_GEN(gt->i915) >= 11) {
 		guc->send_regs.base =
 				i915_mmio_reg_offset(GEN11_SOFT_SCRATCH(0));
 		guc->send_regs.count = GEN11_SOFT_SCRATCH_COUNT;
@@ -67,7 +68,7 @@ void intel_guc_init_send_regs(struct intel_guc *guc)
 	}
 
 	for (i = 0; i < guc->send_regs.count; i++) {
-		fw_domains |= intel_uncore_forcewake_for_reg(&dev_priv->uncore,
+		fw_domains |= intel_uncore_forcewake_for_reg(gt->uncore,
 					guc_send_reg(guc, i),
 					FW_REG_READ | FW_REG_WRITE);
 	}
@@ -127,7 +128,7 @@ static void guc_shared_data_destroy(struct intel_guc *guc)
 
 int intel_guc_init(struct intel_guc *guc)
 {
-	struct drm_i915_private *dev_priv = guc_to_i915(guc);
+	struct intel_gt *gt = guc_to_gt(guc);
 	int ret;
 
 	ret = intel_uc_fw_init(&guc->fw);
@@ -153,7 +154,7 @@ int intel_guc_init(struct intel_guc *guc)
 		goto err_ads;
 
 	/* We need to notify the guc whenever we change the GGTT */
-	i915_ggtt_enable_guc(dev_priv);
+	i915_ggtt_enable_guc(gt->ggtt);
 
 	return 0;
 
@@ -172,9 +173,9 @@ err_fetch:
 
 void intel_guc_fini(struct intel_guc *guc)
 {
-	struct drm_i915_private *dev_priv = guc_to_i915(guc);
+	struct intel_gt *gt = guc_to_gt(guc);
 
-	i915_ggtt_disable_guc(dev_priv);
+	i915_ggtt_disable_guc(gt->ggtt);
 
 	intel_guc_ct_fini(&guc->ct);
 
@@ -282,7 +283,7 @@ static u32 guc_ctl_ads_flags(struct intel_guc *guc)
  */
 void intel_guc_init_params(struct intel_guc *guc)
 {
-	struct drm_i915_private *dev_priv = guc_to_i915(guc);
+	struct intel_uncore *uncore = guc_to_gt(guc)->uncore;
 	u32 params[GUC_CTL_MAX_DWORDS];
 	int i;
 
@@ -302,14 +303,14 @@ void intel_guc_init_params(struct intel_guc *guc)
 	 * they are power context saved so it's ok to release forcewake
 	 * when we are done here and take it again at xfer time.
 	 */
-	intel_uncore_forcewake_get(&dev_priv->uncore, FORCEWAKE_BLITTER);
+	intel_uncore_forcewake_get(uncore, FORCEWAKE_BLITTER);
 
-	I915_WRITE(SOFT_SCRATCH(0), 0);
+	intel_uncore_write(uncore, SOFT_SCRATCH(0), 0);
 
 	for (i = 0; i < GUC_CTL_MAX_DWORDS; i++)
-		I915_WRITE(SOFT_SCRATCH(1 + i), params[i]);
+		intel_uncore_write(uncore, SOFT_SCRATCH(1 + i), params[i]);
 
-	intel_uncore_forcewake_put(&dev_priv->uncore, FORCEWAKE_BLITTER);
+	intel_uncore_forcewake_put(uncore, FORCEWAKE_BLITTER);
 }
 
 int intel_guc_send_nop(struct intel_guc *guc, const u32 *action, u32 len,
@@ -330,8 +331,7 @@ void intel_guc_to_host_event_handler_nop(struct intel_guc *guc)
 int intel_guc_send_mmio(struct intel_guc *guc, const u32 *action, u32 len,
 			u32 *response_buf, u32 response_buf_size)
 {
-	struct drm_i915_private *dev_priv = guc_to_i915(guc);
-	struct intel_uncore *uncore = &dev_priv->uncore;
+	struct intel_uncore *uncore = guc_to_gt(guc)->uncore;
 	u32 status;
 	int i;
 	int ret;
@@ -380,7 +380,8 @@ int intel_guc_send_mmio(struct intel_guc *guc, const u32 *action, u32 len,
 		int count = min(response_buf_size, guc->send_regs.count - 1);
 
 		for (i = 0; i < count; i++)
-			response_buf[i] = I915_READ(guc_send_reg(guc, i + 1));
+			response_buf[i] = intel_uncore_read(uncore,
+							    guc_send_reg(guc, i + 1));
 	}
 
 	/* Use data from the GuC response as our return value */
@@ -454,7 +455,7 @@ int intel_guc_auth_huc(struct intel_guc *guc, u32 rsa_offset)
  */
 int intel_guc_suspend(struct intel_guc *guc)
 {
-	struct drm_i915_private *dev_priv = guc_to_i915(guc);
+	struct intel_uncore *uncore = guc_to_gt(guc)->uncore;
 	int ret;
 	u32 status;
 	u32 action[] = {
@@ -472,13 +473,14 @@ int intel_guc_suspend(struct intel_guc *guc)
 	 * in progress so we need to take care of that ourselves as well.
 	 */
 
-	I915_WRITE(SOFT_SCRATCH(14), INTEL_GUC_SLEEP_STATE_INVALID_MASK);
+	intel_uncore_write(uncore, SOFT_SCRATCH(14),
+			   INTEL_GUC_SLEEP_STATE_INVALID_MASK);
 
 	ret = intel_guc_send(guc, action, ARRAY_SIZE(action));
 	if (ret)
 		return ret;
 
-	ret = __intel_wait_for_register(&dev_priv->uncore, SOFT_SCRATCH(14),
+	ret = __intel_wait_for_register(uncore, SOFT_SCRATCH(14),
 					INTEL_GUC_SLEEP_STATE_INVALID_MASK,
 					0, 0, 10, &status);
 	if (ret)
@@ -574,17 +576,17 @@ int intel_guc_resume(struct intel_guc *guc)
  */
 struct i915_vma *intel_guc_allocate_vma(struct intel_guc *guc, u32 size)
 {
-	struct drm_i915_private *dev_priv = guc_to_i915(guc);
+	struct intel_gt *gt = guc_to_gt(guc);
 	struct drm_i915_gem_object *obj;
 	struct i915_vma *vma;
 	u64 flags;
 	int ret;
 
-	obj = i915_gem_object_create_shmem(dev_priv, size);
+	obj = i915_gem_object_create_shmem(gt->i915, size);
 	if (IS_ERR(obj))
 		return ERR_CAST(obj);
 
-	vma = i915_vma_instance(obj, &dev_priv->ggtt.vm, NULL);
+	vma = i915_vma_instance(obj, &gt->ggtt->vm, NULL);
 	if (IS_ERR(vma))
 		goto err;
 
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c
index ee95d4960c5c..98305e3fd42c 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c
@@ -27,6 +27,7 @@
  *    Alex Dai <yu.dai@intel.com>
  */
 
+#include "gt/intel_gt.h"
 #include "intel_guc_fw.h"
 #include "i915_drv.h"
 
@@ -129,35 +130,37 @@ void intel_guc_fw_init_early(struct intel_guc *guc)
 
 static void guc_prepare_xfer(struct intel_guc *guc)
 {
-	struct drm_i915_private *dev_priv = guc_to_i915(guc);
+	struct intel_gt *gt = guc_to_gt(guc);
+	struct intel_uncore *uncore = gt->uncore;
+	u32 shim_flags = GUC_DISABLE_SRAM_INIT_TO_ZEROES |
+			 GUC_ENABLE_READ_CACHE_LOGIC |
+			 GUC_ENABLE_MIA_CACHING |
+			 GUC_ENABLE_READ_CACHE_FOR_SRAM_DATA |
+			 GUC_ENABLE_READ_CACHE_FOR_WOPCM_DATA |
+			 GUC_ENABLE_MIA_CLOCK_GATING;
 
 	/* Must program this register before loading the ucode with DMA */
-	I915_WRITE(GUC_SHIM_CONTROL, GUC_DISABLE_SRAM_INIT_TO_ZEROES |
-				     GUC_ENABLE_READ_CACHE_LOGIC |
-				     GUC_ENABLE_MIA_CACHING |
-				     GUC_ENABLE_READ_CACHE_FOR_SRAM_DATA |
-				     GUC_ENABLE_READ_CACHE_FOR_WOPCM_DATA |
-				     GUC_ENABLE_MIA_CLOCK_GATING);
-
-	if (IS_GEN9_LP(dev_priv))
-		I915_WRITE(GEN9LP_GT_PM_CONFIG, GT_DOORBELL_ENABLE);
+	intel_uncore_write(uncore, GUC_SHIM_CONTROL, shim_flags);
+
+	if (IS_GEN9_LP(gt->i915))
+		intel_uncore_write(uncore, GEN9LP_GT_PM_CONFIG, GT_DOORBELL_ENABLE);
 	else
-		I915_WRITE(GEN9_GT_PM_CONFIG, GT_DOORBELL_ENABLE);
+		intel_uncore_write(uncore, GEN9_GT_PM_CONFIG, GT_DOORBELL_ENABLE);
 
-	if (IS_GEN(dev_priv, 9)) {
+	if (IS_GEN(gt->i915, 9)) {
 		/* DOP Clock Gating Enable for GuC clocks */
-		I915_WRITE(GEN7_MISCCPCTL, (GEN8_DOP_CLOCK_GATE_GUC_ENABLE |
-					    I915_READ(GEN7_MISCCPCTL)));
+		intel_uncore_rmw(uncore, GEN7_MISCCPCTL,
+				 0, GEN8_DOP_CLOCK_GATE_GUC_ENABLE);
 
 		/* allows for 5us (in 10ns units) before GT can go to RC6 */
-		I915_WRITE(GUC_ARAT_C6DIS, 0x1FF);
+		intel_uncore_write(uncore, GUC_ARAT_C6DIS, 0x1FF);
 	}
 }
 
 /* Copy RSA signature from the fw image to HW for verification */
 static void guc_xfer_rsa(struct intel_guc *guc)
 {
-	struct drm_i915_private *dev_priv = guc_to_i915(guc);
+	struct intel_uncore *uncore = guc_to_gt(guc)->uncore;
 	struct intel_uc_fw *fw = &guc->fw;
 	struct sg_table *pages = fw->obj->mm.pages;
 	u32 rsa[UOS_RSA_SCRATCH_COUNT];
@@ -167,15 +170,13 @@ static void guc_xfer_rsa(struct intel_guc *guc)
 			   rsa, sizeof(rsa), fw->rsa_offset);
 
 	for (i = 0; i < UOS_RSA_SCRATCH_COUNT; i++)
-		I915_WRITE(UOS_RSA_SCRATCH(i), rsa[i]);
+		intel_uncore_write(uncore, UOS_RSA_SCRATCH(i), rsa[i]);
 }
 
-static bool guc_xfer_completed(struct intel_guc *guc, u32 *status)
+static bool guc_xfer_completed(struct intel_uncore *uncore, u32 *status)
 {
-	struct drm_i915_private *dev_priv = guc_to_i915(guc);
-
 	/* Did we complete the xfer? */
-	*status = I915_READ(DMA_CTRL);
+	*status = intel_uncore_read(uncore, DMA_CTRL);
 	return !(*status & START_DMA);
 }
 
@@ -188,10 +189,9 @@ static bool guc_xfer_completed(struct intel_guc *guc, u32 *status)
  * This is used for polling the GuC status in a wait_for()
  * loop below.
  */
-static inline bool guc_ready(struct intel_guc *guc, u32 *status)
+static inline bool guc_ready(struct intel_uncore *uncore, u32 *status)
 {
-	struct drm_i915_private *dev_priv = guc_to_i915(guc);
-	u32 val = I915_READ(GUC_STATUS);
+	u32 val = intel_uncore_read(uncore, GUC_STATUS);
 	u32 uk_val = val & GS_UKERNEL_MASK;
 
 	*status = val;
@@ -199,9 +199,8 @@ static inline bool guc_ready(struct intel_guc *guc, u32 *status)
 		((val & GS_MIA_CORE_STATE) && (uk_val == GS_UKERNEL_LAPIC_DONE));
 }
 
-static int guc_wait_ucode(struct intel_guc *guc)
+static int guc_wait_ucode(struct intel_uncore *uncore)
 {
-	struct drm_i915_private *i915 = guc_to_i915(guc);
 	u32 status;
 	int ret;
 
@@ -213,7 +212,7 @@ static int guc_wait_ucode(struct intel_guc *guc)
 	 * (Higher levels of the driver may decide to reset the GuC and
 	 * attempt the ucode load again if this happens.)
 	 */
-	ret = wait_for(guc_ready(guc, &status), 100);
+	ret = wait_for(guc_ready(uncore, &status), 100);
 	DRM_DEBUG_DRIVER("GuC status %#x\n", status);
 
 	if ((status & GS_BOOTROM_MASK) == GS_BOOTROM_RSA_FAILED) {
@@ -223,11 +222,11 @@ static int guc_wait_ucode(struct intel_guc *guc)
 
 	if ((status & GS_UKERNEL_MASK) == GS_UKERNEL_EXCEPTION) {
 		DRM_ERROR("GuC firmware exception. EIP: %#x\n",
-			  intel_uncore_read(&i915->uncore, SOFT_SCRATCH(13)));
+			  intel_uncore_read(uncore, SOFT_SCRATCH(13)));
 		ret = -ENXIO;
 	}
 
-	if (ret == 0 && !guc_xfer_completed(guc, &status)) {
+	if (ret == 0 && !guc_xfer_completed(uncore, &status)) {
 		DRM_ERROR("GuC is ready, but the xfer %08x is incomplete\n",
 			  status);
 		ret = -ENXIO;
@@ -245,7 +244,7 @@ static int guc_wait_ucode(struct intel_guc *guc)
  */
 static int guc_xfer_ucode(struct intel_guc *guc)
 {
-	struct drm_i915_private *dev_priv = guc_to_i915(guc);
+	struct intel_uncore *uncore = guc_to_gt(guc)->uncore;
 	struct intel_uc_fw *guc_fw = &guc->fw;
 	unsigned long offset;
 
@@ -253,24 +252,26 @@ static int guc_xfer_ucode(struct intel_guc *guc)
 	 * The header plus uCode will be copied to WOPCM via DMA, excluding any
 	 * other components
 	 */
-	I915_WRITE(DMA_COPY_SIZE, guc_fw->header_size + guc_fw->ucode_size);
+	intel_uncore_write(uncore, DMA_COPY_SIZE,
+			   guc_fw->header_size + guc_fw->ucode_size);
 
 	/* Set the source address for the new blob */
 	offset = intel_uc_fw_ggtt_offset(guc_fw) + guc_fw->header_offset;
-	I915_WRITE(DMA_ADDR_0_LOW, lower_32_bits(offset));
-	I915_WRITE(DMA_ADDR_0_HIGH, upper_32_bits(offset) & 0xFFFF);
+	intel_uncore_write(uncore, DMA_ADDR_0_LOW, lower_32_bits(offset));
+	intel_uncore_write(uncore, DMA_ADDR_0_HIGH, upper_32_bits(offset) & 0xFFFF);
 
 	/*
 	 * Set the DMA destination. Current uCode expects the code to be
 	 * loaded at 8k; locations below this are used for the stack.
 	 */
-	I915_WRITE(DMA_ADDR_1_LOW, 0x2000);
-	I915_WRITE(DMA_ADDR_1_HIGH, DMA_ADDRESS_SPACE_WOPCM);
+	intel_uncore_write(uncore, DMA_ADDR_1_LOW, 0x2000);
+	intel_uncore_write(uncore, DMA_ADDR_1_HIGH, DMA_ADDRESS_SPACE_WOPCM);
 
 	/* Finally start the DMA */
-	I915_WRITE(DMA_CTRL, _MASKED_BIT_ENABLE(UOS_MOVE | START_DMA));
+	intel_uncore_write(uncore, DMA_CTRL,
+			   _MASKED_BIT_ENABLE(UOS_MOVE | START_DMA));
 
-	return guc_wait_ucode(guc);
+	return guc_wait_ucode(uncore);
 }
 /*
  * Load the GuC firmware blob into the MinuteIA.
@@ -278,12 +279,12 @@ static int guc_xfer_ucode(struct intel_guc *guc)
 static int guc_fw_xfer(struct intel_uc_fw *guc_fw)
 {
 	struct intel_guc *guc = container_of(guc_fw, struct intel_guc, fw);
-	struct drm_i915_private *dev_priv = guc_to_i915(guc);
+	struct intel_uncore *uncore = guc_to_gt(guc)->uncore;
 	int ret;
 
 	GEM_BUG_ON(guc_fw->type != INTEL_UC_FW_TYPE_GUC);
 
-	intel_uncore_forcewake_get(&dev_priv->uncore, FORCEWAKE_ALL);
+	intel_uncore_forcewake_get(uncore, FORCEWAKE_ALL);
 
 	guc_prepare_xfer(guc);
 
@@ -296,7 +297,7 @@ static int guc_fw_xfer(struct intel_uc_fw *guc_fw)
 
 	ret = guc_xfer_ucode(guc);
 
-	intel_uncore_forcewake_put(&dev_priv->uncore, FORCEWAKE_ALL);
+	intel_uncore_forcewake_put(uncore, FORCEWAKE_ALL);
 
 	return ret;
 }
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
index fa22d377ae48..a0f2a01365bc 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -28,6 +28,7 @@
 
 #include "gt/intel_context.h"
 #include "gt/intel_engine_pm.h"
+#include "gt/intel_gt.h"
 #include "gt/intel_lrc_reg.h"
 #include "intel_guc_submission.h"
 
@@ -201,10 +202,10 @@ static struct guc_doorbell_info *__get_doorbell(struct intel_guc_client *client)
 
 static bool __doorbell_valid(struct intel_guc *guc, u16 db_id)
 {
-	struct drm_i915_private *dev_priv = guc_to_i915(guc);
+	struct intel_uncore *uncore = guc_to_gt(guc)->uncore;
 
 	GEM_BUG_ON(db_id >= GUC_NUM_DOORBELLS);
-	return I915_READ(GEN8_DRBREGL(db_id)) & GEN8_DRB_VALID;
+	return intel_uncore_read(uncore, GEN8_DRBREGL(db_id)) & GEN8_DRB_VALID;
 }
 
 static void __init_doorbell(struct intel_guc_client *client)
@@ -1001,9 +1002,10 @@ void intel_guc_submission_fini(struct intel_guc *guc)
 		guc_stage_desc_pool_destroy(guc);
 }
 
-static void guc_interrupts_capture(struct drm_i915_private *dev_priv)
+static void guc_interrupts_capture(struct intel_gt *gt)
 {
-	struct intel_rps *rps = &dev_priv->gt_pm.rps;
+	struct intel_rps *rps = &gt->i915->gt_pm.rps;
+	struct intel_uncore *uncore = gt->uncore;
 	struct intel_engine_cs *engine;
 	enum intel_engine_id id;
 	int irqs;
@@ -1012,16 +1014,16 @@ static void guc_interrupts_capture(struct drm_i915_private *dev_priv)
 	 * to GuC
 	 */
 	irqs = _MASKED_BIT_ENABLE(GFX_INTERRUPT_STEERING);
-	for_each_engine(engine, dev_priv, id)
+	for_each_engine(engine, gt->i915, id)
 		ENGINE_WRITE(engine, RING_MODE_GEN7, irqs);
 
 	/* route USER_INTERRUPT to Host, all others are sent to GuC. */
 	irqs = GT_RENDER_USER_INTERRUPT << GEN8_RCS_IRQ_SHIFT |
 	       GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT;
 	/* These three registers have the same bit definitions */
-	I915_WRITE(GUC_BCS_RCS_IER, ~irqs);
-	I915_WRITE(GUC_VCS2_VCS1_IER, ~irqs);
-	I915_WRITE(GUC_WD_VECS_IER, ~irqs);
+	intel_uncore_write(uncore, GUC_BCS_RCS_IER, ~irqs);
+	intel_uncore_write(uncore, GUC_VCS2_VCS1_IER, ~irqs);
+	intel_uncore_write(uncore, GUC_WD_VECS_IER, ~irqs);
 
 	/*
 	 * The REDIRECT_TO_GUC bit of the PMINTRMSK register directs all
@@ -1046,9 +1048,10 @@ static void guc_interrupts_capture(struct drm_i915_private *dev_priv)
 	rps->pm_intrmsk_mbz &= ~GEN8_PMINTR_DISABLE_REDIRECT_TO_GUC;
 }
 
-static void guc_interrupts_release(struct drm_i915_private *dev_priv)
+static void guc_interrupts_release(struct intel_gt *gt)
 {
-	struct intel_rps *rps = &dev_priv->gt_pm.rps;
+	struct intel_rps *rps = &gt->i915->gt_pm.rps;
+	struct intel_uncore *uncore = gt->uncore;
 	struct intel_engine_cs *engine;
 	enum intel_engine_id id;
 	int irqs;
@@ -1059,13 +1062,13 @@ static void guc_interrupts_release(struct drm_i915_private *dev_priv)
 	 */
 	irqs = _MASKED_FIELD(GFX_FORWARD_VBLANK_MASK, GFX_FORWARD_VBLANK_NEVER);
 	irqs |= _MASKED_BIT_DISABLE(GFX_INTERRUPT_STEERING);
-	for_each_engine(engine, dev_priv, id)
+	for_each_engine(engine, gt->i915, id)
 		ENGINE_WRITE(engine, RING_MODE_GEN7, irqs);
 
 	/* route all GT interrupts to the host */
-	I915_WRITE(GUC_BCS_RCS_IER, 0);
-	I915_WRITE(GUC_VCS2_VCS1_IER, 0);
-	I915_WRITE(GUC_WD_VECS_IER, 0);
+	intel_uncore_write(uncore, GUC_BCS_RCS_IER, 0);
+	intel_uncore_write(uncore, GUC_VCS2_VCS1_IER, 0);
+	intel_uncore_write(uncore, GUC_WD_VECS_IER, 0);
 
 	rps->pm_intrmsk_mbz |= GEN8_PMINTR_DISABLE_REDIRECT_TO_GUC;
 	rps->pm_intrmsk_mbz &= ~ARAT_EXPIRED_INTRMSK;
@@ -1115,7 +1118,7 @@ static void guc_set_default_submission(struct intel_engine_cs *engine)
 
 int intel_guc_submission_enable(struct intel_guc *guc)
 {
-	struct drm_i915_private *dev_priv = guc_to_i915(guc);
+	struct intel_gt *gt = guc_to_gt(guc);
 	struct intel_engine_cs *engine;
 	enum intel_engine_id id;
 	int err;
@@ -1140,9 +1143,9 @@ int intel_guc_submission_enable(struct intel_guc *guc)
 		return err;
 
 	/* Take over from manual control of ELSP (execlists) */
-	guc_interrupts_capture(dev_priv);
+	guc_interrupts_capture(gt);
 
-	for_each_engine(engine, dev_priv, id) {
+	for_each_engine(engine, gt->i915, id) {
 		engine->set_default_submission = guc_set_default_submission;
 		engine->set_default_submission(engine);
 	}
@@ -1152,11 +1155,11 @@ int intel_guc_submission_enable(struct intel_guc *guc)
 
 void intel_guc_submission_disable(struct intel_guc *guc)
 {
-	struct drm_i915_private *dev_priv = guc_to_i915(guc);
+	struct intel_gt *gt = guc_to_gt(guc);
 
-	GEM_BUG_ON(dev_priv->gt.awake); /* GT should be parked first */
+	GEM_BUG_ON(gt->awake); /* GT should be parked first */
 
-	guc_interrupts_release(dev_priv);
+	guc_interrupts_release(gt);
 	guc_clients_disable(guc);
 }
 
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_huc.c b/drivers/gpu/drm/i915/gt/uc/intel_huc.c
index 581c9c3d4fc0..99f0fa2e8ff5 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_huc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_huc.c
@@ -24,6 +24,7 @@
 
 #include <linux/types.h>
 
+#include "gt/intel_gt.h"
 #include "intel_huc.h"
 #include "i915_drv.h"
 
@@ -46,8 +47,8 @@ void intel_huc_init_early(struct intel_huc *huc)
 
 static int intel_huc_rsa_data_create(struct intel_huc *huc)
 {
-	struct drm_i915_private *i915 = huc_to_i915(huc);
-	struct intel_guc *guc = &i915->gt.uc.guc;
+	struct intel_gt *gt = huc_to_gt(huc);
+	struct intel_guc *guc = &gt->uc.guc;
 	struct i915_vma *vma;
 	void *vaddr;
 
@@ -112,8 +113,8 @@ void intel_huc_fini(struct intel_huc *huc)
  */
 int intel_huc_auth(struct intel_huc *huc)
 {
-	struct drm_i915_private *i915 = huc_to_i915(huc);
-	struct intel_guc *guc = &i915->gt.uc.guc;
+	struct intel_gt *gt = huc_to_gt(huc);
+	struct intel_guc *guc = &gt->uc.guc;
 	int ret;
 
 	if (huc->fw.load_status != INTEL_UC_FIRMWARE_SUCCESS)
@@ -127,7 +128,7 @@ int intel_huc_auth(struct intel_huc *huc)
 	}
 
 	/* Check authentication status, it should be done by now */
-	ret = __intel_wait_for_register(&i915->uncore,
+	ret = __intel_wait_for_register(gt->uncore,
 					huc->status.reg,
 					huc->status.mask,
 					huc->status.value,
@@ -159,16 +160,15 @@ fail:
  */
 int intel_huc_check_status(struct intel_huc *huc)
 {
-	struct drm_i915_private *dev_priv = huc_to_i915(huc);
+	struct intel_gt *gt = huc_to_gt(huc);
 	intel_wakeref_t wakeref;
 	bool status = false;
 
-	if (!HAS_HUC(dev_priv))
+	if (!intel_uc_is_using_huc(&gt->uc))
 		return -ENODEV;
 
-	with_intel_runtime_pm(&dev_priv->runtime_pm, wakeref)
-		status = (I915_READ(huc->status.reg) & huc->status.mask) ==
-			  huc->status.value;
+	with_intel_runtime_pm(&gt->i915->runtime_pm, wakeref)
+		status = intel_uncore_read(gt->uncore, huc->status.reg);
 
-	return status;
+	return (status & huc->status.mask) == huc->status.value;
 }
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c b/drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c
index 06e726ba9863..becfd34a26c1 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c
@@ -4,6 +4,7 @@
  * Copyright © 2014-2018 Intel Corporation
  */
 
+#include "gt/intel_gt.h"
 #include "intel_huc_fw.h"
 #include "i915_drv.h"
 
@@ -139,8 +140,7 @@ static void huc_xfer_rsa(struct intel_huc *huc)
 static int huc_xfer_ucode(struct intel_huc *huc)
 {
 	struct intel_uc_fw *huc_fw = &huc->fw;
-	struct drm_i915_private *dev_priv = huc_to_i915(huc);
-	struct intel_uncore *uncore = &dev_priv->uncore;
+	struct intel_uncore *uncore = huc_to_gt(huc)->uncore;
 	unsigned long offset = 0;
 	u32 size;
 	int ret;
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.c b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
index 0c43d547bc94..41a770865477 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_uc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
@@ -228,7 +228,7 @@ static void guc_free_load_err_log(struct intel_guc *guc)
  */
 static void guc_clear_mmio_msg(struct intel_guc *guc)
 {
-	intel_uncore_write(&guc_to_i915(guc)->uncore, SOFT_SCRATCH(15), 0);
+	intel_uncore_write(guc_to_gt(guc)->uncore, SOFT_SCRATCH(15), 0);
 }
 
 static void guc_get_mmio_msg(struct intel_guc *guc)
@@ -237,7 +237,7 @@ static void guc_get_mmio_msg(struct intel_guc *guc)
 
 	spin_lock_irq(&guc->irq_lock);
 
-	val = intel_uncore_read(&guc_to_i915(guc)->uncore, SOFT_SCRATCH(15));
+	val = intel_uncore_read(guc_to_gt(guc)->uncore, SOFT_SCRATCH(15));
 	guc->mmio_msg |= val & guc->msg_enabled_mask;
 
 	/*
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 6da564e27a64..1e3ccdf7fe1b 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -3333,10 +3333,8 @@ int i915_ggtt_enable_hw(struct drm_i915_private *dev_priv)
 	return 0;
 }
 
-void i915_ggtt_enable_guc(struct drm_i915_private *i915)
+void i915_ggtt_enable_guc(struct i915_ggtt *ggtt)
 {
-	struct i915_ggtt *ggtt = &i915->ggtt;
-
 	GEM_BUG_ON(ggtt->invalidate != gen6_ggtt_invalidate);
 
 	ggtt->invalidate = guc_ggtt_invalidate;
@@ -3344,10 +3342,8 @@ void i915_ggtt_enable_guc(struct drm_i915_private *i915)
 	ggtt->invalidate(ggtt);
 }
 
-void i915_ggtt_disable_guc(struct drm_i915_private *i915)
+void i915_ggtt_disable_guc(struct i915_ggtt *ggtt)
 {
-	struct i915_ggtt *ggtt = &i915->ggtt;
-
 	/* XXX Temporary pardon for error unload */
 	if (ggtt->invalidate == gen6_ggtt_invalidate)
 		return;
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index a450349b3a50..de156634a889 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -631,8 +631,8 @@ i915_vm_to_ppgtt(struct i915_address_space *vm)
 int i915_ggtt_probe_hw(struct drm_i915_private *dev_priv);
 int i915_ggtt_init_hw(struct drm_i915_private *dev_priv);
 int i915_ggtt_enable_hw(struct drm_i915_private *dev_priv);
-void i915_ggtt_enable_guc(struct drm_i915_private *i915);
-void i915_ggtt_disable_guc(struct drm_i915_private *i915);
+void i915_ggtt_enable_guc(struct i915_ggtt *ggtt);
+void i915_ggtt_disable_guc(struct i915_ggtt *ggtt);
 int i915_init_ggtt(struct drm_i915_private *dev_priv);
 void i915_ggtt_driver_release(struct drm_i915_private *dev_priv);