drm/amdgpu: use static mmio offset for NV mailbox

what:
with the new "req_init_data" handshake we need to use mailbox
before do IP discovery, so in mxgpu_nv.c file the original
SOC15_REG method won'twork because that depends on IP discovery
complete first.

how:
so the solution is to always use static MMIO offset for NV+ mailbox
registers.
HW team confirm us all MAILBOX registers will be at the same
offset for all ASICs, no IP discovery needed for those registers

Signed-off-by: Monk Liu <[e-mail]>
Reviewed-by: Emily Deng <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

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

···
  */
 static enum idh_event xgpu_nv_mailbox_peek_msg(struct amdgpu_device *adev)
 {
-	return RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
-				mmBIF_BX_PF_MAILBOX_MSGBUF_RCV_DW0));
+	return RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW0);
 }
 
 
···
 {
 	u32 reg;
 
-	reg = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
-					     mmBIF_BX_PF_MAILBOX_MSGBUF_RCV_DW0));
+	reg = RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW0);
 	if (reg != event)
 		return -ENOENT;
 
···
 static void xgpu_nv_mailbox_trans_msg (struct amdgpu_device *adev,
 	      enum idh_request req, u32 data1, u32 data2, u32 data3)
 {
-	u32 reg;
 	int r;
 	uint8_t trn;
 
···
 		}
 	} while (trn);
 
-	reg = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
-					     mmBIF_BX_PF_MAILBOX_MSGBUF_TRN_DW0));
-	reg = REG_SET_FIELD(reg, BIF_BX_PF_MAILBOX_MSGBUF_TRN_DW0,
-			    MSGBUF_DATA, req);
-	WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF_MAILBOX_MSGBUF_TRN_DW0),
-		      reg);
-	WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF_MAILBOX_MSGBUF_TRN_DW1),
-				data1);
-	WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF_MAILBOX_MSGBUF_TRN_DW2),
-				data2);
-	WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF_MAILBOX_MSGBUF_TRN_DW3),
-				data3);
-
+	WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW0, req);
+	WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW1, data1);
+	WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW2, data2);
+	WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW3, data3);
 	xgpu_nv_mailbox_set_valid(adev, true);
 
 	/* start to poll ack */
···
 			if (req == IDH_REQ_GPU_INIT_DATA)
 			{
 				adev->virt.req_init_data_ver =
-					RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
-						mmBIF_BX_PF_MAILBOX_MSGBUF_RCV_DW1));
+					RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW1);
 
 				/* assume V1 in case host doesn't set version number */
 				if (adev->virt.req_init_data_ver < 1)
···
 		/* Retrieve checksum from mailbox2 */
 		if (req == IDH_REQ_GPU_INIT_ACCESS || req == IDH_REQ_GPU_RESET_ACCESS) {
 			adev->virt.fw_reserve.checksum_key =
-				RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
-					mmBIF_BX_PF_MAILBOX_MSGBUF_RCV_DW2));
+				RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW2);
 		}
 	}
 
···
 					unsigned type,
 					enum amdgpu_interrupt_state state)
 {
-	u32 tmp = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF_MAILBOX_INT_CNTL));
+	u32 tmp = RREG32_NO_KIQ(mmMAILBOX_INT_CNTL);
 
-	tmp = REG_SET_FIELD(tmp, BIF_BX_PF_MAILBOX_INT_CNTL, ACK_INT_EN,
-				(state == AMDGPU_IRQ_STATE_ENABLE) ? 1 : 0);
-	WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF_MAILBOX_INT_CNTL), tmp);
+	if (state == AMDGPU_IRQ_STATE_ENABLE)
+		tmp |= 2;
+	else
+		tmp &= ~2;
+
+	WREG32_NO_KIQ(mmMAILBOX_INT_CNTL, tmp);
 
 	return 0;
 }
···
 				       unsigned type,
 				       enum amdgpu_interrupt_state state)
 {
-	u32 tmp = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF_MAILBOX_INT_CNTL));
+	u32 tmp = RREG32_NO_KIQ(mmMAILBOX_INT_CNTL);
 
-	tmp = REG_SET_FIELD(tmp, BIF_BX_PF_MAILBOX_INT_CNTL, VALID_INT_EN,
-			    (state == AMDGPU_IRQ_STATE_ENABLE) ? 1 : 0);
-	WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF_MAILBOX_INT_CNTL), tmp);
+	if (state == AMDGPU_IRQ_STATE_ENABLE)
+		tmp |= 1;
+	else
+		tmp &= ~1;
+
+	WREG32_NO_KIQ(mmMAILBOX_INT_CNTL, tmp);
 
 	return 0;
 }

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

···
 int xgpu_nv_mailbox_get_irq(struct amdgpu_device *adev);
 void xgpu_nv_mailbox_put_irq(struct amdgpu_device *adev);
 
-#define NV_MAIBOX_CONTROL_TRN_OFFSET_BYTE (SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF_MAILBOX_CONTROL) * 4)
-#define NV_MAIBOX_CONTROL_RCV_OFFSET_BYTE (SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF_MAILBOX_CONTROL) * 4 + 1)
+#define mmMAILBOX_CONTROL 0xE5E
+
+#define NV_MAIBOX_CONTROL_TRN_OFFSET_BYTE (mmMAILBOX_CONTROL * 4)
+#define NV_MAIBOX_CONTROL_RCV_OFFSET_BYTE (NV_MAIBOX_CONTROL_TRN_OFFSET_BYTE + 1)
+
+#define mmMAILBOX_MSGBUF_TRN_DW0 0xE56
+#define mmMAILBOX_MSGBUF_TRN_DW1 0xE57
+#define mmMAILBOX_MSGBUF_TRN_DW2 0xE58
+#define mmMAILBOX_MSGBUF_TRN_DW3 0xE59
+
+#define mmMAILBOX_MSGBUF_RCV_DW0 0xE5A
+#define mmMAILBOX_MSGBUF_RCV_DW1 0xE5B
+#define mmMAILBOX_MSGBUF_RCV_DW2 0xE5C
+#define mmMAILBOX_MSGBUF_RCV_DW3 0xE5D
+
+#define mmMAILBOX_INT_CNTL 0xE5F
 
 #endif