1 /*
2  * Copyright 2019 Advanced Micro Devices, Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  */
23 #include "amdgpu.h"
24 #include "amdgpu_atombios.h"
25 #include "nbio_v2_3.h"
26 
27 #include "nbio/nbio_2_3_default.h"
28 #include "nbio/nbio_2_3_offset.h"
29 #include "nbio/nbio_2_3_sh_mask.h"
30 #include <uapi/linux/kfd_ioctl.h>
31 #include <linux/pci.h>
32 
33 #define smnPCIE_CONFIG_CNTL	0x11180044
34 #define smnCPM_CONTROL		0x11180460
35 #define smnPCIE_CNTL2		0x11180070
36 #define smnPCIE_LC_CNTL		0x11140280
37 #define smnPCIE_LC_CNTL3	0x111402d4
38 #define smnPCIE_LC_CNTL6	0x111402ec
39 #define smnPCIE_LC_CNTL7	0x111402f0
40 #define smnBIF_CFG_DEV0_EPF0_DEVICE_CNTL2	0x1014008c
41 #define smnRCC_EP_DEV0_0_EP_PCIE_TX_LTR_CNTL	0x10123538
42 #define smnBIF_CFG_DEV0_EPF0_PCIE_LTR_CAP	0x10140324
43 #define smnPSWUSP0_PCIE_LC_CNTL2		0x111402c4
44 #define smnNBIF_MGCG_CTRL_LCLK			0x1013a21c
45 
46 #define mmBIF_SDMA2_DOORBELL_RANGE		0x01d6
47 #define mmBIF_SDMA2_DOORBELL_RANGE_BASE_IDX	2
48 #define mmBIF_SDMA3_DOORBELL_RANGE		0x01d7
49 #define mmBIF_SDMA3_DOORBELL_RANGE_BASE_IDX	2
50 
51 #define mmBIF_MMSCH1_DOORBELL_RANGE		0x01d8
52 #define mmBIF_MMSCH1_DOORBELL_RANGE_BASE_IDX	2
53 
54 #define smnPCIE_LC_LINK_WIDTH_CNTL		0x11140288
55 
56 #define GPU_HDP_FLUSH_DONE__RSVD_ENG0_MASK	0x00001000L /* Don't use.  Firmware uses this bit internally */
57 #define GPU_HDP_FLUSH_DONE__RSVD_ENG1_MASK	0x00002000L
58 #define GPU_HDP_FLUSH_DONE__RSVD_ENG2_MASK	0x00004000L
59 #define GPU_HDP_FLUSH_DONE__RSVD_ENG3_MASK	0x00008000L
60 #define GPU_HDP_FLUSH_DONE__RSVD_ENG4_MASK	0x00010000L
61 #define GPU_HDP_FLUSH_DONE__RSVD_ENG5_MASK	0x00020000L
62 #define GPU_HDP_FLUSH_DONE__RSVD_ENG6_MASK	0x00040000L
63 #define GPU_HDP_FLUSH_DONE__RSVD_ENG7_MASK	0x00080000L
64 #define GPU_HDP_FLUSH_DONE__RSVD_ENG8_MASK	0x00100000L
65 
66 static void nbio_v2_3_remap_hdp_registers(struct amdgpu_device *adev)
67 {
68 	WREG32_SOC15(NBIO, 0, mmREMAP_HDP_MEM_FLUSH_CNTL,
69 		adev->rmmio_remap.reg_offset + KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL);
70 	WREG32_SOC15(NBIO, 0, mmREMAP_HDP_REG_FLUSH_CNTL,
71 		adev->rmmio_remap.reg_offset + KFD_MMIO_REMAP_HDP_REG_FLUSH_CNTL);
72 }
73 
74 static u32 nbio_v2_3_get_rev_id(struct amdgpu_device *adev)
75 {
76 	u32 tmp;
77 
78 	/*
79 	 * guest vm gets 0xffffffff when reading RCC_DEV0_EPF0_STRAP0,
80 	 * therefore we force rev_id to 0 (which is the default value)
81 	 */
82 	if (amdgpu_sriov_vf(adev)) {
83 		return 0;
84 	}
85 
86 	tmp = RREG32_SOC15(NBIO, 0, mmRCC_DEV0_EPF0_STRAP0);
87 	tmp &= RCC_DEV0_EPF0_STRAP0__STRAP_ATI_REV_ID_DEV0_F0_MASK;
88 	tmp >>= RCC_DEV0_EPF0_STRAP0__STRAP_ATI_REV_ID_DEV0_F0__SHIFT;
89 
90 	return tmp;
91 }
92 
93 static void nbio_v2_3_mc_access_enable(struct amdgpu_device *adev, bool enable)
94 {
95 	if (enable)
96 		WREG32_SOC15(NBIO, 0, mmBIF_FB_EN,
97 			     BIF_FB_EN__FB_READ_EN_MASK |
98 			     BIF_FB_EN__FB_WRITE_EN_MASK);
99 	else
100 		WREG32_SOC15(NBIO, 0, mmBIF_FB_EN, 0);
101 }
102 
103 static u32 nbio_v2_3_get_memsize(struct amdgpu_device *adev)
104 {
105 	return RREG32_SOC15(NBIO, 0, mmRCC_DEV0_EPF0_RCC_CONFIG_MEMSIZE);
106 }
107 
108 static void nbio_v2_3_sdma_doorbell_range(struct amdgpu_device *adev, int instance,
109 					  bool use_doorbell, int doorbell_index,
110 					  int doorbell_size)
111 {
112 	u32 reg = instance == 0 ? SOC15_REG_OFFSET(NBIO, 0, mmBIF_SDMA0_DOORBELL_RANGE) :
113 			instance == 1 ? SOC15_REG_OFFSET(NBIO, 0, mmBIF_SDMA1_DOORBELL_RANGE) :
114 			instance == 2 ? SOC15_REG_OFFSET(NBIO, 0, mmBIF_SDMA2_DOORBELL_RANGE) :
115 			SOC15_REG_OFFSET(NBIO, 0, mmBIF_SDMA3_DOORBELL_RANGE);
116 
117 	u32 doorbell_range = RREG32(reg);
118 
119 	if (use_doorbell) {
120 		doorbell_range = REG_SET_FIELD(doorbell_range,
121 					       BIF_SDMA0_DOORBELL_RANGE, OFFSET,
122 					       doorbell_index);
123 		doorbell_range = REG_SET_FIELD(doorbell_range,
124 					       BIF_SDMA0_DOORBELL_RANGE, SIZE,
125 					       doorbell_size);
126 	} else
127 		doorbell_range = REG_SET_FIELD(doorbell_range,
128 					       BIF_SDMA0_DOORBELL_RANGE, SIZE,
129 					       0);
130 
131 	WREG32(reg, doorbell_range);
132 }
133 
134 static void nbio_v2_3_vcn_doorbell_range(struct amdgpu_device *adev, bool use_doorbell,
135 					 int doorbell_index, int instance)
136 {
137 	u32 reg = instance ? SOC15_REG_OFFSET(NBIO, 0, mmBIF_MMSCH1_DOORBELL_RANGE) :
138 		SOC15_REG_OFFSET(NBIO, 0, mmBIF_MMSCH0_DOORBELL_RANGE);
139 
140 	u32 doorbell_range = RREG32(reg);
141 
142 	if (use_doorbell) {
143 		doorbell_range = REG_SET_FIELD(doorbell_range,
144 					       BIF_MMSCH0_DOORBELL_RANGE, OFFSET,
145 					       doorbell_index);
146 		doorbell_range = REG_SET_FIELD(doorbell_range,
147 					       BIF_MMSCH0_DOORBELL_RANGE, SIZE, 8);
148 	} else
149 		doorbell_range = REG_SET_FIELD(doorbell_range,
150 					       BIF_MMSCH0_DOORBELL_RANGE, SIZE, 0);
151 
152 	WREG32(reg, doorbell_range);
153 }
154 
155 static void nbio_v2_3_enable_doorbell_aperture(struct amdgpu_device *adev,
156 					       bool enable)
157 {
158 	WREG32_FIELD15(NBIO, 0, RCC_DEV0_EPF0_RCC_DOORBELL_APER_EN, BIF_DOORBELL_APER_EN,
159 		       enable ? 1 : 0);
160 }
161 
162 static void nbio_v2_3_enable_doorbell_selfring_aperture(struct amdgpu_device *adev,
163 							bool enable)
164 {
165 	u32 tmp = 0;
166 
167 	if (enable) {
168 		tmp = REG_SET_FIELD(tmp, BIF_BX_PF_DOORBELL_SELFRING_GPA_APER_CNTL,
169 				    DOORBELL_SELFRING_GPA_APER_EN, 1) |
170 		      REG_SET_FIELD(tmp, BIF_BX_PF_DOORBELL_SELFRING_GPA_APER_CNTL,
171 				    DOORBELL_SELFRING_GPA_APER_MODE, 1) |
172 		      REG_SET_FIELD(tmp, BIF_BX_PF_DOORBELL_SELFRING_GPA_APER_CNTL,
173 				    DOORBELL_SELFRING_GPA_APER_SIZE, 0);
174 
175 		WREG32_SOC15(NBIO, 0, mmBIF_BX_PF_DOORBELL_SELFRING_GPA_APER_BASE_LOW,
176 			     lower_32_bits(adev->doorbell.base));
177 		WREG32_SOC15(NBIO, 0, mmBIF_BX_PF_DOORBELL_SELFRING_GPA_APER_BASE_HIGH,
178 			     upper_32_bits(adev->doorbell.base));
179 	}
180 
181 	WREG32_SOC15(NBIO, 0, mmBIF_BX_PF_DOORBELL_SELFRING_GPA_APER_CNTL,
182 		     tmp);
183 }
184 
185 
186 static void nbio_v2_3_ih_doorbell_range(struct amdgpu_device *adev,
187 					bool use_doorbell, int doorbell_index)
188 {
189 	u32 ih_doorbell_range = RREG32_SOC15(NBIO, 0, mmBIF_IH_DOORBELL_RANGE);
190 
191 	if (use_doorbell) {
192 		ih_doorbell_range = REG_SET_FIELD(ih_doorbell_range,
193 						  BIF_IH_DOORBELL_RANGE, OFFSET,
194 						  doorbell_index);
195 		ih_doorbell_range = REG_SET_FIELD(ih_doorbell_range,
196 						  BIF_IH_DOORBELL_RANGE, SIZE,
197 						  2);
198 	} else
199 		ih_doorbell_range = REG_SET_FIELD(ih_doorbell_range,
200 						  BIF_IH_DOORBELL_RANGE, SIZE,
201 						  0);
202 
203 	WREG32_SOC15(NBIO, 0, mmBIF_IH_DOORBELL_RANGE, ih_doorbell_range);
204 }
205 
206 static void nbio_v2_3_ih_control(struct amdgpu_device *adev)
207 {
208 	u32 interrupt_cntl;
209 
210 	/* setup interrupt control */
211 	WREG32_SOC15(NBIO, 0, mmINTERRUPT_CNTL2, adev->dummy_page_addr >> 8);
212 
213 	interrupt_cntl = RREG32_SOC15(NBIO, 0, mmINTERRUPT_CNTL);
214 	/*
215 	 * INTERRUPT_CNTL__IH_DUMMY_RD_OVERRIDE_MASK=0 - dummy read disabled with msi, enabled without msi
216 	 * INTERRUPT_CNTL__IH_DUMMY_RD_OVERRIDE_MASK=1 - dummy read controlled by IH_DUMMY_RD_EN
217 	 */
218 	interrupt_cntl = REG_SET_FIELD(interrupt_cntl, INTERRUPT_CNTL,
219 				       IH_DUMMY_RD_OVERRIDE, 0);
220 
221 	/* INTERRUPT_CNTL__IH_REQ_NONSNOOP_EN_MASK=1 if ring is in non-cacheable memory, e.g., vram */
222 	interrupt_cntl = REG_SET_FIELD(interrupt_cntl, INTERRUPT_CNTL,
223 				       IH_REQ_NONSNOOP_EN, 0);
224 
225 	WREG32_SOC15(NBIO, 0, mmINTERRUPT_CNTL, interrupt_cntl);
226 }
227 
228 static void nbio_v2_3_update_medium_grain_clock_gating(struct amdgpu_device *adev,
229 						       bool enable)
230 {
231 	uint32_t def, data;
232 
233 	if (!(adev->cg_flags & AMD_CG_SUPPORT_BIF_MGCG))
234 		return;
235 
236 	def = data = RREG32_PCIE(smnCPM_CONTROL);
237 	if (enable) {
238 		data |= (CPM_CONTROL__LCLK_DYN_GATE_ENABLE_MASK |
239 			 CPM_CONTROL__TXCLK_DYN_GATE_ENABLE_MASK |
240 			 CPM_CONTROL__TXCLK_LCNT_GATE_ENABLE_MASK |
241 			 CPM_CONTROL__TXCLK_REGS_GATE_ENABLE_MASK |
242 			 CPM_CONTROL__TXCLK_PRBS_GATE_ENABLE_MASK |
243 			 CPM_CONTROL__REFCLK_REGS_GATE_ENABLE_MASK);
244 	} else {
245 		data &= ~(CPM_CONTROL__LCLK_DYN_GATE_ENABLE_MASK |
246 			  CPM_CONTROL__TXCLK_DYN_GATE_ENABLE_MASK |
247 			  CPM_CONTROL__TXCLK_LCNT_GATE_ENABLE_MASK |
248 			  CPM_CONTROL__TXCLK_REGS_GATE_ENABLE_MASK |
249 			  CPM_CONTROL__TXCLK_PRBS_GATE_ENABLE_MASK |
250 			  CPM_CONTROL__REFCLK_REGS_GATE_ENABLE_MASK);
251 	}
252 
253 	if (def != data)
254 		WREG32_PCIE(smnCPM_CONTROL, data);
255 }
256 
257 static void nbio_v2_3_update_medium_grain_light_sleep(struct amdgpu_device *adev,
258 						      bool enable)
259 {
260 	uint32_t def, data;
261 
262 	if (!(adev->cg_flags & AMD_CG_SUPPORT_BIF_LS))
263 		return;
264 
265 	def = data = RREG32_PCIE(smnPCIE_CNTL2);
266 	if (enable) {
267 		data |= (PCIE_CNTL2__SLV_MEM_LS_EN_MASK |
268 			 PCIE_CNTL2__MST_MEM_LS_EN_MASK |
269 			 PCIE_CNTL2__REPLAY_MEM_LS_EN_MASK);
270 	} else {
271 		data &= ~(PCIE_CNTL2__SLV_MEM_LS_EN_MASK |
272 			  PCIE_CNTL2__MST_MEM_LS_EN_MASK |
273 			  PCIE_CNTL2__REPLAY_MEM_LS_EN_MASK);
274 	}
275 
276 	if (def != data)
277 		WREG32_PCIE(smnPCIE_CNTL2, data);
278 }
279 
280 static void nbio_v2_3_get_clockgating_state(struct amdgpu_device *adev,
281 					    u64 *flags)
282 {
283 	int data;
284 
285 	/* AMD_CG_SUPPORT_BIF_MGCG */
286 	data = RREG32_PCIE(smnCPM_CONTROL);
287 	if (data & CPM_CONTROL__LCLK_DYN_GATE_ENABLE_MASK)
288 		*flags |= AMD_CG_SUPPORT_BIF_MGCG;
289 
290 	/* AMD_CG_SUPPORT_BIF_LS */
291 	data = RREG32_PCIE(smnPCIE_CNTL2);
292 	if (data & PCIE_CNTL2__SLV_MEM_LS_EN_MASK)
293 		*flags |= AMD_CG_SUPPORT_BIF_LS;
294 }
295 
296 static u32 nbio_v2_3_get_hdp_flush_req_offset(struct amdgpu_device *adev)
297 {
298 	return SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF_GPU_HDP_FLUSH_REQ);
299 }
300 
301 static u32 nbio_v2_3_get_hdp_flush_done_offset(struct amdgpu_device *adev)
302 {
303 	return SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF_GPU_HDP_FLUSH_DONE);
304 }
305 
306 static u32 nbio_v2_3_get_pcie_index_offset(struct amdgpu_device *adev)
307 {
308 	return SOC15_REG_OFFSET(NBIO, 0, mmPCIE_INDEX2);
309 }
310 
311 static u32 nbio_v2_3_get_pcie_data_offset(struct amdgpu_device *adev)
312 {
313 	return SOC15_REG_OFFSET(NBIO, 0, mmPCIE_DATA2);
314 }
315 
316 const struct nbio_hdp_flush_reg nbio_v2_3_hdp_flush_reg = {
317 	.ref_and_mask_cp0 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__CP0_MASK,
318 	.ref_and_mask_cp1 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__CP1_MASK,
319 	.ref_and_mask_cp2 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__CP2_MASK,
320 	.ref_and_mask_cp3 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__CP3_MASK,
321 	.ref_and_mask_cp4 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__CP4_MASK,
322 	.ref_and_mask_cp5 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__CP5_MASK,
323 	.ref_and_mask_cp6 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__CP6_MASK,
324 	.ref_and_mask_cp7 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__CP7_MASK,
325 	.ref_and_mask_cp8 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__CP8_MASK,
326 	.ref_and_mask_cp9 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__CP9_MASK,
327 	.ref_and_mask_sdma0 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__SDMA0_MASK,
328 	.ref_and_mask_sdma1 = BIF_BX_PF_GPU_HDP_FLUSH_DONE__SDMA1_MASK,
329 };
330 
331 static void nbio_v2_3_init_registers(struct amdgpu_device *adev)
332 {
333 	uint32_t def, data;
334 
335 	def = data = RREG32_PCIE(smnPCIE_CONFIG_CNTL);
336 	data = REG_SET_FIELD(data, PCIE_CONFIG_CNTL, CI_SWUS_MAX_READ_REQUEST_SIZE_MODE, 1);
337 	data = REG_SET_FIELD(data, PCIE_CONFIG_CNTL, CI_SWUS_MAX_READ_REQUEST_SIZE_PRIV, 1);
338 
339 	if (def != data)
340 		WREG32_PCIE(smnPCIE_CONFIG_CNTL, data);
341 
342 	if (amdgpu_sriov_vf(adev))
343 		adev->rmmio_remap.reg_offset = SOC15_REG_OFFSET(NBIO, 0,
344 			mmBIF_BX_DEV0_EPF0_VF0_HDP_MEM_COHERENCY_FLUSH_CNTL) << 2;
345 }
346 
347 #define NAVI10_PCIE__LC_L0S_INACTIVITY_DEFAULT		0x00000000 // off by default, no gains over L1
348 #define NAVI10_PCIE__LC_L1_INACTIVITY_DEFAULT		0x00000009 // 1=1us, 9=1ms
349 #define NAVI10_PCIE__LC_L1_INACTIVITY_TBT_DEFAULT	0x0000000E // 4ms
350 
351 static void nbio_v2_3_enable_aspm(struct amdgpu_device *adev,
352 				  bool enable)
353 {
354 	uint32_t def, data;
355 
356 	def = data = RREG32_PCIE(smnPCIE_LC_CNTL);
357 
358 	if (enable) {
359 		/* Disable ASPM L0s/L1 first */
360 		data &= ~(PCIE_LC_CNTL__LC_L0S_INACTIVITY_MASK | PCIE_LC_CNTL__LC_L1_INACTIVITY_MASK);
361 
362 		data |= NAVI10_PCIE__LC_L0S_INACTIVITY_DEFAULT << PCIE_LC_CNTL__LC_L0S_INACTIVITY__SHIFT;
363 
364 		if (pci_is_thunderbolt_attached(adev->pdev))
365 			data |= NAVI10_PCIE__LC_L1_INACTIVITY_TBT_DEFAULT  << PCIE_LC_CNTL__LC_L1_INACTIVITY__SHIFT;
366 		else
367 			data |= NAVI10_PCIE__LC_L1_INACTIVITY_DEFAULT << PCIE_LC_CNTL__LC_L1_INACTIVITY__SHIFT;
368 
369 		data &= ~PCIE_LC_CNTL__LC_PMI_TO_L1_DIS_MASK;
370 	} else {
371 		/* Disbale ASPM L1 */
372 		data &= ~PCIE_LC_CNTL__LC_L1_INACTIVITY_MASK;
373 		/* Disable ASPM TxL0s */
374 		data &= ~PCIE_LC_CNTL__LC_L0S_INACTIVITY_MASK;
375 		/* Disable ACPI L1 */
376 		data |= PCIE_LC_CNTL__LC_PMI_TO_L1_DIS_MASK;
377 	}
378 
379 	if (def != data)
380 		WREG32_PCIE(smnPCIE_LC_CNTL, data);
381 }
382 
383 #ifdef CONFIG_PCIEASPM
384 static void nbio_v2_3_program_ltr(struct amdgpu_device *adev)
385 {
386 	uint32_t def, data;
387 
388 	WREG32_PCIE(smnRCC_EP_DEV0_0_EP_PCIE_TX_LTR_CNTL, 0x75EB);
389 
390 	def = data = RREG32_SOC15(NBIO, 0, mmRCC_BIF_STRAP2);
391 	data &= ~RCC_BIF_STRAP2__STRAP_LTR_IN_ASPML1_DIS_MASK;
392 	if (def != data)
393 		WREG32_SOC15(NBIO, 0, mmRCC_BIF_STRAP2, data);
394 
395 	def = data = RREG32_PCIE(smnRCC_EP_DEV0_0_EP_PCIE_TX_LTR_CNTL);
396 	data &= ~EP_PCIE_TX_LTR_CNTL__LTR_PRIV_MSG_DIS_IN_PM_NON_D0_MASK;
397 	if (def != data)
398 		WREG32_PCIE(smnRCC_EP_DEV0_0_EP_PCIE_TX_LTR_CNTL, data);
399 
400 	def = data = RREG32_PCIE(smnBIF_CFG_DEV0_EPF0_DEVICE_CNTL2);
401 	data |= BIF_CFG_DEV0_EPF0_DEVICE_CNTL2__LTR_EN_MASK;
402 	if (def != data)
403 		WREG32_PCIE(smnBIF_CFG_DEV0_EPF0_DEVICE_CNTL2, data);
404 }
405 #endif
406 
407 static void nbio_v2_3_program_aspm(struct amdgpu_device *adev)
408 {
409 #ifdef CONFIG_PCIEASPM
410 	uint32_t def, data;
411 
412 	def = data = RREG32_PCIE(smnPCIE_LC_CNTL);
413 	data &= ~PCIE_LC_CNTL__LC_L1_INACTIVITY_MASK;
414 	data &= ~PCIE_LC_CNTL__LC_L0S_INACTIVITY_MASK;
415 	data |= PCIE_LC_CNTL__LC_PMI_TO_L1_DIS_MASK;
416 	if (def != data)
417 		WREG32_PCIE(smnPCIE_LC_CNTL, data);
418 
419 	def = data = RREG32_PCIE(smnPCIE_LC_CNTL7);
420 	data |= PCIE_LC_CNTL7__LC_NBIF_ASPM_INPUT_EN_MASK;
421 	if (def != data)
422 		WREG32_PCIE(smnPCIE_LC_CNTL7, data);
423 
424 	def = data = RREG32_PCIE(smnNBIF_MGCG_CTRL_LCLK);
425 	data |= NBIF_MGCG_CTRL_LCLK__NBIF_MGCG_REG_DIS_LCLK_MASK;
426 	if (def != data)
427 		WREG32_PCIE(smnNBIF_MGCG_CTRL_LCLK, data);
428 
429 	def = data = RREG32_PCIE(smnPCIE_LC_CNTL3);
430 	data |= PCIE_LC_CNTL3__LC_DSC_DONT_ENTER_L23_AFTER_PME_ACK_MASK;
431 	if (def != data)
432 		WREG32_PCIE(smnPCIE_LC_CNTL3, data);
433 
434 	def = data = RREG32_SOC15(NBIO, 0, mmRCC_BIF_STRAP3);
435 	data &= ~RCC_BIF_STRAP3__STRAP_VLINK_ASPM_IDLE_TIMER_MASK;
436 	data &= ~RCC_BIF_STRAP3__STRAP_VLINK_PM_L1_ENTRY_TIMER_MASK;
437 	if (def != data)
438 		WREG32_SOC15(NBIO, 0, mmRCC_BIF_STRAP3, data);
439 
440 	def = data = RREG32_SOC15(NBIO, 0, mmRCC_BIF_STRAP5);
441 	data &= ~RCC_BIF_STRAP5__STRAP_VLINK_LDN_ENTRY_TIMER_MASK;
442 	if (def != data)
443 		WREG32_SOC15(NBIO, 0, mmRCC_BIF_STRAP5, data);
444 
445 	def = data = RREG32_PCIE(smnBIF_CFG_DEV0_EPF0_DEVICE_CNTL2);
446 	data &= ~BIF_CFG_DEV0_EPF0_DEVICE_CNTL2__LTR_EN_MASK;
447 	if (def != data)
448 		WREG32_PCIE(smnBIF_CFG_DEV0_EPF0_DEVICE_CNTL2, data);
449 
450 	WREG32_PCIE(smnBIF_CFG_DEV0_EPF0_PCIE_LTR_CAP, 0x10011001);
451 
452 	def = data = RREG32_PCIE(smnPSWUSP0_PCIE_LC_CNTL2);
453 	data |= PSWUSP0_PCIE_LC_CNTL2__LC_ALLOW_PDWN_IN_L1_MASK |
454 		PSWUSP0_PCIE_LC_CNTL2__LC_ALLOW_PDWN_IN_L23_MASK;
455 	data &= ~PSWUSP0_PCIE_LC_CNTL2__LC_RCV_L0_TO_RCV_L0S_DIS_MASK;
456 	if (def != data)
457 		WREG32_PCIE(smnPSWUSP0_PCIE_LC_CNTL2, data);
458 
459 	def = data = RREG32_PCIE(smnPCIE_LC_CNTL6);
460 	data |= PCIE_LC_CNTL6__LC_L1_POWERDOWN_MASK |
461 		PCIE_LC_CNTL6__LC_RX_L0S_STANDBY_EN_MASK;
462 	if (def != data)
463 		WREG32_PCIE(smnPCIE_LC_CNTL6, data);
464 
465 	/* Don't bother about LTR if LTR is not enabled
466 	 * in the path */
467 	if (adev->pdev->ltr_path)
468 		nbio_v2_3_program_ltr(adev);
469 
470 	def = data = RREG32_SOC15(NBIO, 0, mmRCC_BIF_STRAP3);
471 	data |= 0x5DE0 << RCC_BIF_STRAP3__STRAP_VLINK_ASPM_IDLE_TIMER__SHIFT;
472 	data |= 0x0010 << RCC_BIF_STRAP3__STRAP_VLINK_PM_L1_ENTRY_TIMER__SHIFT;
473 	if (def != data)
474 		WREG32_SOC15(NBIO, 0, mmRCC_BIF_STRAP3, data);
475 
476 	def = data = RREG32_SOC15(NBIO, 0, mmRCC_BIF_STRAP5);
477 	data |= 0x0010 << RCC_BIF_STRAP5__STRAP_VLINK_LDN_ENTRY_TIMER__SHIFT;
478 	if (def != data)
479 		WREG32_SOC15(NBIO, 0, mmRCC_BIF_STRAP5, data);
480 
481 	def = data = RREG32_PCIE(smnPCIE_LC_CNTL);
482 	data &= ~PCIE_LC_CNTL__LC_L0S_INACTIVITY_MASK;
483 	data |= 0x9 << PCIE_LC_CNTL__LC_L1_INACTIVITY__SHIFT;
484 	data |= 0x1 << PCIE_LC_CNTL__LC_PMI_TO_L1_DIS__SHIFT;
485 	if (def != data)
486 		WREG32_PCIE(smnPCIE_LC_CNTL, data);
487 
488 	def = data = RREG32_PCIE(smnPCIE_LC_CNTL3);
489 	data &= ~PCIE_LC_CNTL3__LC_DSC_DONT_ENTER_L23_AFTER_PME_ACK_MASK;
490 	if (def != data)
491 		WREG32_PCIE(smnPCIE_LC_CNTL3, data);
492 #endif
493 }
494 
495 static void nbio_v2_3_apply_lc_spc_mode_wa(struct amdgpu_device *adev)
496 {
497 	uint32_t reg_data = 0;
498 	uint32_t link_width = 0;
499 
500 	if (!((adev->asic_type >= CHIP_NAVI10) &&
501 	     (adev->asic_type <= CHIP_NAVI12)))
502 		return;
503 
504 	reg_data = RREG32_PCIE(smnPCIE_LC_LINK_WIDTH_CNTL);
505 	link_width = (reg_data & PCIE_LC_LINK_WIDTH_CNTL__LC_LINK_WIDTH_RD_MASK)
506 		>> PCIE_LC_LINK_WIDTH_CNTL__LC_LINK_WIDTH_RD__SHIFT;
507 
508 	/*
509 	 * Program PCIE_LC_CNTL6.LC_SPC_MODE_8GT to 0x2 (4 symbols per clock data)
510 	 * if link_width is 0x3 (x4)
511 	 */
512 	if (0x3 == link_width) {
513 		reg_data = RREG32_PCIE(smnPCIE_LC_CNTL6);
514 		reg_data &= ~PCIE_LC_CNTL6__LC_SPC_MODE_8GT_MASK;
515 		reg_data |= (0x2 << PCIE_LC_CNTL6__LC_SPC_MODE_8GT__SHIFT);
516 		WREG32_PCIE(smnPCIE_LC_CNTL6, reg_data);
517 	}
518 }
519 
520 static void nbio_v2_3_apply_l1_link_width_reconfig_wa(struct amdgpu_device *adev)
521 {
522 	uint32_t reg_data = 0;
523 
524 	if (adev->asic_type != CHIP_NAVI10)
525 		return;
526 
527 	reg_data = RREG32_PCIE(smnPCIE_LC_LINK_WIDTH_CNTL);
528 	reg_data |= PCIE_LC_LINK_WIDTH_CNTL__LC_L1_RECONFIG_EN_MASK;
529 	WREG32_PCIE(smnPCIE_LC_LINK_WIDTH_CNTL, reg_data);
530 }
531 
532 static void nbio_v2_3_clear_doorbell_interrupt(struct amdgpu_device *adev)
533 {
534 	uint32_t reg, reg_data;
535 
536 	if (adev->ip_versions[NBIO_HWIP][0] != IP_VERSION(3, 3, 0))
537 		return;
538 
539 	reg = RREG32_SOC15(NBIO, 0, mmBIF_RB_CNTL);
540 
541 	/* Clear Interrupt Status
542 	 */
543 	if ((reg & BIF_RB_CNTL__RB_ENABLE_MASK) == 0) {
544 		reg = RREG32_SOC15(NBIO, 0, mmBIF_DOORBELL_INT_CNTL);
545 		if (reg & BIF_DOORBELL_INT_CNTL__DOORBELL_INTERRUPT_STATUS_MASK) {
546 			reg_data = 1 << BIF_DOORBELL_INT_CNTL__DOORBELL_INTERRUPT_CLEAR__SHIFT;
547 			WREG32_SOC15(NBIO, 0, mmBIF_DOORBELL_INT_CNTL, reg_data);
548 		}
549 	}
550 }
551 
552 const struct amdgpu_nbio_funcs nbio_v2_3_funcs = {
553 	.get_hdp_flush_req_offset = nbio_v2_3_get_hdp_flush_req_offset,
554 	.get_hdp_flush_done_offset = nbio_v2_3_get_hdp_flush_done_offset,
555 	.get_pcie_index_offset = nbio_v2_3_get_pcie_index_offset,
556 	.get_pcie_data_offset = nbio_v2_3_get_pcie_data_offset,
557 	.get_rev_id = nbio_v2_3_get_rev_id,
558 	.mc_access_enable = nbio_v2_3_mc_access_enable,
559 	.get_memsize = nbio_v2_3_get_memsize,
560 	.sdma_doorbell_range = nbio_v2_3_sdma_doorbell_range,
561 	.vcn_doorbell_range = nbio_v2_3_vcn_doorbell_range,
562 	.enable_doorbell_aperture = nbio_v2_3_enable_doorbell_aperture,
563 	.enable_doorbell_selfring_aperture = nbio_v2_3_enable_doorbell_selfring_aperture,
564 	.ih_doorbell_range = nbio_v2_3_ih_doorbell_range,
565 	.update_medium_grain_clock_gating = nbio_v2_3_update_medium_grain_clock_gating,
566 	.update_medium_grain_light_sleep = nbio_v2_3_update_medium_grain_light_sleep,
567 	.get_clockgating_state = nbio_v2_3_get_clockgating_state,
568 	.ih_control = nbio_v2_3_ih_control,
569 	.init_registers = nbio_v2_3_init_registers,
570 	.remap_hdp_registers = nbio_v2_3_remap_hdp_registers,
571 	.enable_aspm = nbio_v2_3_enable_aspm,
572 	.program_aspm =  nbio_v2_3_program_aspm,
573 	.apply_lc_spc_mode_wa = nbio_v2_3_apply_lc_spc_mode_wa,
574 	.apply_l1_link_width_reconfig_wa = nbio_v2_3_apply_l1_link_width_reconfig_wa,
575 	.clear_doorbell_interrupt = nbio_v2_3_clear_doorbell_interrupt,
576 };
577