drm/amdgpu:impl RREG32 no kiq version

some registers are PF & VF copy, and we can safely use
mmio method to access them.

and sometime we are forbid to use kiq to access registers
for example in INTR context.

we need a MACRO that always disable KIQ for regs accessing

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu.h

@@ -1505,9 +1505,9 @@ void amdgpu_device_fini(struct amdgpu_device *adev);
 int amdgpu_gpu_wait_for_idle(struct amdgpu_device *adev);
 
 uint32_t amdgpu_mm_rreg(struct amdgpu_device *adev, uint32_t reg,
-			bool always_indirect);
+			uint32_t acc_flags);
 void amdgpu_mm_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v,
-		    bool always_indirect);
+		    uint32_t acc_flags);
 u32 amdgpu_io_rreg(struct amdgpu_device *adev, u32 reg);
 void amdgpu_io_wreg(struct amdgpu_device *adev, u32 reg, u32 v);
 
@@ -1517,11 +1517,18 @@ void amdgpu_mm_wdoorbell(struct amdgpu_device *adev, u32 index, u32 v);
 /*
  * Registers read & write functions.
  */
-#define RREG32(reg) amdgpu_mm_rreg(adev, (reg), false)
-#define RREG32_IDX(reg) amdgpu_mm_rreg(adev, (reg), true)
-#define DREG32(reg) printk(KERN_INFO "REGISTER: " #reg " : 0x%08X\n", amdgpu_mm_rreg(adev, (reg), false))
-#define WREG32(reg, v) amdgpu_mm_wreg(adev, (reg), (v), false)
-#define WREG32_IDX(reg, v) amdgpu_mm_wreg(adev, (reg), (v), true)
+
+#define AMDGPU_REGS_IDX       (1<<0)
+#define AMDGPU_REGS_NO_KIQ    (1<<1)
+
+#define RREG32_NO_KIQ(reg) amdgpu_mm_rreg(adev, (reg), AMDGPU_REGS_NO_KIQ)
+#define WREG32_NO_KIQ(reg, v) amdgpu_mm_wreg(adev, (reg), (v), AMDGPU_REGS_NO_KIQ)
+
+#define RREG32(reg) amdgpu_mm_rreg(adev, (reg), 0)
+#define RREG32_IDX(reg) amdgpu_mm_rreg(adev, (reg), AMDGPU_REGS_IDX)
+#define DREG32(reg) printk(KERN_INFO "REGISTER: " #reg " : 0x%08X\n", amdgpu_mm_rreg(adev, (reg), 0))
+#define WREG32(reg, v) amdgpu_mm_wreg(adev, (reg), (v), 0)
+#define WREG32_IDX(reg, v) amdgpu_mm_wreg(adev, (reg), (v), AMDGPU_REGS_IDX)
 #define REG_SET(FIELD, v) (((v) << FIELD##_SHIFT) & FIELD##_MASK)
 #define REG_GET(FIELD, v) (((v) << FIELD##_SHIFT) & FIELD##_MASK)
 #define RREG32_PCIE(reg) adev->pcie_rreg(adev, (reg))

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

@@ -90,16 +90,16 @@ bool amdgpu_device_is_px(struct drm_device *dev)
  * MMIO register access helper functions.
  */
 uint32_t amdgpu_mm_rreg(struct amdgpu_device *adev, uint32_t reg,
-			bool always_indirect)
+			uint32_t acc_flags)
 {
 	uint32_t ret;
 
-	if (amdgpu_sriov_runtime(adev)) {
+	if (!(acc_flags & AMDGPU_REGS_NO_KIQ) && amdgpu_sriov_runtime(adev)) {
 		BUG_ON(in_interrupt());
 		return amdgpu_virt_kiq_rreg(adev, reg);
 	}
 
-	if ((reg * 4) < adev->rmmio_size && !always_indirect)
+	if ((reg * 4) < adev->rmmio_size && !(acc_flags & AMDGPU_REGS_IDX))
 		ret = readl(((void __iomem *)adev->rmmio) + (reg * 4));
 	else {
 		unsigned long flags;
@@ -114,16 +114,16 @@ uint32_t amdgpu_mm_rreg(struct amdgpu_device *adev, uint32_t reg,
 }
 
 void amdgpu_mm_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v,
-		    bool always_indirect)
+		    uint32_t acc_flags)
 {
 	trace_amdgpu_mm_wreg(adev->pdev->device, reg, v);
 
-	if (amdgpu_sriov_runtime(adev)) {
+	if (!(acc_flags & AMDGPU_REGS_NO_KIQ) && amdgpu_sriov_runtime(adev)) {
 		BUG_ON(in_interrupt());
 		return amdgpu_virt_kiq_wreg(adev, reg, v);
 	}
 
-	if ((reg * 4) < adev->rmmio_size && !always_indirect)
+	if ((reg * 4) < adev->rmmio_size && !(acc_flags & AMDGPU_REGS_IDX))
 		writel(v, ((void __iomem *)adev->rmmio) + (reg * 4));
 	else {
 		unsigned long flags;