Revert "drm/amdgpu: support access regs outside of mmio bar"

This reverts commit 2eee0229f65e897134566888e5321bcb3af0df7a.
Fallback to a stable base until we have a correct new one

Signed-off-by:Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 28 insertions, 17 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 7a4e9656d74f..7a610850a646 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -301,10 +301,10 @@ void amdgpu_device_vram_access(struct amdgpu_device *adev, loff_t pos,
 }
 
 /*
- * device register access helper functions.
+ * MMIO register access helper functions.
  */
 /**
- * amdgpu_device_rreg - read a register
+ * amdgpu_mm_rreg - read a memory mapped IO register
  *
  * @adev: amdgpu_device pointer
  * @reg: dword aligned register offset
@@ -312,8 +312,8 @@ void amdgpu_device_vram_access(struct amdgpu_device *adev, loff_t pos,
  *
  * Returns the 32 bit value from the offset specified.
  */
-uint32_t amdgpu_device_rreg(struct amdgpu_device *adev, uint32_t reg,
-			    uint32_t acc_flags)
+uint32_t amdgpu_mm_rreg(struct amdgpu_device *adev, uint32_t reg,
+			uint32_t acc_flags)
 {
 	uint32_t ret;
 
@@ -322,9 +322,15 @@ uint32_t amdgpu_device_rreg(struct amdgpu_device *adev, uint32_t reg,
 
 	if ((reg * 4) < adev->rmmio_size)
 		ret = readl(((void __iomem *)adev->rmmio) + (reg * 4));
-	else
-		ret = adev->pcie_rreg(adev, (reg * 4));
-	trace_amdgpu_device_rreg(adev->pdev->device, reg, ret);
+	else {
+		unsigned long flags;
+
+		spin_lock_irqsave(&adev->mmio_idx_lock, flags);
+		writel((reg * 4), ((void __iomem *)adev->rmmio) + (mmMM_INDEX * 4));
+		ret = readl(((void __iomem *)adev->rmmio) + (mmMM_DATA * 4));
+		spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
+	}
+	trace_amdgpu_mm_rreg(adev->pdev->device, reg, ret);
 	return ret;
 }
 
@@ -370,19 +376,24 @@ void amdgpu_mm_wreg8(struct amdgpu_device *adev, uint32_t offset, uint8_t value)
 		BUG();
 }
 
-void static inline amdgpu_device_wreg_no_kiq(struct amdgpu_device *adev, uint32_t reg,
-					     uint32_t v, uint32_t acc_flags)
+void static inline amdgpu_mm_wreg_mmio(struct amdgpu_device *adev, uint32_t reg, uint32_t v, uint32_t acc_flags)
 {
-	trace_amdgpu_device_wreg(adev->pdev->device, reg, v);
+	trace_amdgpu_mm_wreg(adev->pdev->device, reg, v);
 
 	if ((reg * 4) < adev->rmmio_size)
 		writel(v, ((void __iomem *)adev->rmmio) + (reg * 4));
-	else
-		adev->pcie_wreg(adev, (reg * 4), v);
+	else {
+		unsigned long flags;
+
+		spin_lock_irqsave(&adev->mmio_idx_lock, flags);
+		writel((reg * 4), ((void __iomem *)adev->rmmio) + (mmMM_INDEX * 4));
+		writel(v, ((void __iomem *)adev->rmmio) + (mmMM_DATA * 4));
+		spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
+	}
 }
 
 /**
- * amdgpu_device_wreg - write to a register
+ * amdgpu_mm_wreg - write to a memory mapped IO register
  *
  * @adev: amdgpu_device pointer
  * @reg: dword aligned register offset
@@ -391,13 +402,13 @@ void static inline amdgpu_device_wreg_no_kiq(struct amdgpu_device *adev, uint32_
  *
  * Writes the value specified to the offset specified.
  */
-void amdgpu_device_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v,
-			uint32_t acc_flags)
+void amdgpu_mm_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v,
+		    uint32_t acc_flags)
 {
 	if (!(acc_flags & AMDGPU_REGS_NO_KIQ) && amdgpu_sriov_runtime(adev))
 		return amdgpu_kiq_wreg(adev, reg, v);
 
-	amdgpu_device_wreg_no_kiq(adev, reg, v, acc_flags);
+	amdgpu_mm_wreg_mmio(adev, reg, v, acc_flags);
 }
 
 /*
@@ -416,7 +427,7 @@ void amdgpu_mm_wreg_mmio_rlc(struct amdgpu_device *adev, uint32_t reg, uint32_t
 			return adev->gfx.rlc.funcs->rlcg_wreg(adev, reg, v);
 	}
 
-	amdgpu_device_wreg_no_kiq(adev, reg, v, acc_flags);
+	amdgpu_mm_wreg_mmio(adev, reg, v, acc_flags);
 }
 
 /**