1 /*
2  * Copyright 2016 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 
24 #include <linux/pci.h>
25 
26 #include "amdgpu.h"
27 #include "amdgpu_ih.h"
28 #include "soc15.h"
29 
30 #include "oss/osssys_4_0_offset.h"
31 #include "oss/osssys_4_0_sh_mask.h"
32 
33 #include "soc15_common.h"
34 #include "vega10_ih.h"
35 
36 #define MAX_REARM_RETRY 10
37 
38 static void vega10_ih_set_interrupt_funcs(struct amdgpu_device *adev);
39 
40 /**
41  * vega10_ih_init_register_offset - Initialize register offset for ih rings
42  *
43  * @adev: amdgpu_device pointer
44  *
45  * Initialize register offset ih rings (VEGA10).
46  */
47 static void vega10_ih_init_register_offset(struct amdgpu_device *adev)
48 {
49 	struct amdgpu_ih_regs *ih_regs;
50 
51 	if (adev->irq.ih.ring_size) {
52 		ih_regs = &adev->irq.ih.ih_regs;
53 		ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE);
54 		ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI);
55 		ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL);
56 		ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR);
57 		ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR);
58 		ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR);
59 		ih_regs->ih_rb_wptr_addr_lo = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_ADDR_LO);
60 		ih_regs->ih_rb_wptr_addr_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_ADDR_HI);
61 		ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL;
62 	}
63 
64 	if (adev->irq.ih1.ring_size) {
65 		ih_regs = &adev->irq.ih1.ih_regs;
66 		ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_RING1);
67 		ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI_RING1);
68 		ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL_RING1);
69 		ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_RING1);
70 		ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR_RING1);
71 		ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR_RING1);
72 		ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL_RING1;
73 	}
74 
75 	if (adev->irq.ih2.ring_size) {
76 		ih_regs = &adev->irq.ih2.ih_regs;
77 		ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_RING2);
78 		ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI_RING2);
79 		ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL_RING2);
80 		ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_RING2);
81 		ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR_RING2);
82 		ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR_RING2);
83 		ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL_RING2;
84 	}
85 }
86 
87 /**
88  * vega10_ih_toggle_ring_interrupts - toggle the interrupt ring buffer
89  *
90  * @adev: amdgpu_device pointer
91  * @ih: amdgpu_ih_ring pointet
92  * @enable: true - enable the interrupts, false - disable the interrupts
93  *
94  * Toggle the interrupt ring buffer (VEGA10)
95  */
96 static int vega10_ih_toggle_ring_interrupts(struct amdgpu_device *adev,
97 					    struct amdgpu_ih_ring *ih,
98 					    bool enable)
99 {
100 	struct amdgpu_ih_regs *ih_regs;
101 	uint32_t tmp;
102 
103 	ih_regs = &ih->ih_regs;
104 
105 	tmp = RREG32(ih_regs->ih_rb_cntl);
106 	tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_ENABLE, (enable ? 1 : 0));
107 	tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_GPU_TS_ENABLE, 1);
108 	/* enable_intr field is only valid in ring0 */
109 	if (ih == &adev->irq.ih)
110 		tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, ENABLE_INTR, (enable ? 1 : 0));
111 	if (amdgpu_sriov_vf(adev)) {
112 		if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp)) {
113 			dev_err(adev->dev, "PSP program IH_RB_CNTL failed!\n");
114 			return -ETIMEDOUT;
115 		}
116 	} else {
117 		WREG32(ih_regs->ih_rb_cntl, tmp);
118 	}
119 
120 	if (enable) {
121 		ih->enabled = true;
122 	} else {
123 		/* set rptr, wptr to 0 */
124 		WREG32(ih_regs->ih_rb_rptr, 0);
125 		WREG32(ih_regs->ih_rb_wptr, 0);
126 		ih->enabled = false;
127 		ih->rptr = 0;
128 	}
129 
130 	return 0;
131 }
132 
133 /**
134  * vega10_ih_toggle_interrupts - Toggle all the available interrupt ring buffers
135  *
136  * @adev: amdgpu_device pointer
137  * @enable: enable or disable interrupt ring buffers
138  *
139  * Toggle all the available interrupt ring buffers (VEGA10).
140  */
141 static int vega10_ih_toggle_interrupts(struct amdgpu_device *adev, bool enable)
142 {
143 	struct amdgpu_ih_ring *ih[] = {&adev->irq.ih, &adev->irq.ih1, &adev->irq.ih2};
144 	int i;
145 	int r;
146 
147 	for (i = 0; i < ARRAY_SIZE(ih); i++) {
148 		if (ih[i]->ring_size) {
149 			r = vega10_ih_toggle_ring_interrupts(adev, ih[i], enable);
150 			if (r)
151 				return r;
152 		}
153 	}
154 
155 	return 0;
156 }
157 
158 static uint32_t vega10_ih_rb_cntl(struct amdgpu_ih_ring *ih, uint32_t ih_rb_cntl)
159 {
160 	int rb_bufsz = order_base_2(ih->ring_size / 4);
161 
162 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
163 				   MC_SPACE, ih->use_bus_addr ? 1 : 4);
164 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
165 				   WPTR_OVERFLOW_CLEAR, 1);
166 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
167 				   WPTR_OVERFLOW_ENABLE, 1);
168 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RB_SIZE, rb_bufsz);
169 	/* Ring Buffer write pointer writeback. If enabled, IH_RB_WPTR register
170 	 * value is written to memory
171 	 */
172 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
173 				   WPTR_WRITEBACK_ENABLE, 1);
174 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_SNOOP, 1);
175 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_RO, 0);
176 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_VMID, 0);
177 
178 	return ih_rb_cntl;
179 }
180 
181 static uint32_t vega10_ih_doorbell_rptr(struct amdgpu_ih_ring *ih)
182 {
183 	u32 ih_doorbell_rtpr = 0;
184 
185 	if (ih->use_doorbell) {
186 		ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr,
187 						 IH_DOORBELL_RPTR, OFFSET,
188 						 ih->doorbell_index);
189 		ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr,
190 						 IH_DOORBELL_RPTR,
191 						 ENABLE, 1);
192 	} else {
193 		ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr,
194 						 IH_DOORBELL_RPTR,
195 						 ENABLE, 0);
196 	}
197 	return ih_doorbell_rtpr;
198 }
199 
200 /**
201  * vega10_ih_enable_ring - enable an ih ring buffer
202  *
203  * @adev: amdgpu_device pointer
204  * @ih: amdgpu_ih_ring pointer
205  *
206  * Enable an ih ring buffer (VEGA10)
207  */
208 static int vega10_ih_enable_ring(struct amdgpu_device *adev,
209 				 struct amdgpu_ih_ring *ih)
210 {
211 	struct amdgpu_ih_regs *ih_regs;
212 	uint32_t tmp;
213 
214 	ih_regs = &ih->ih_regs;
215 
216 	/* Ring Buffer base. [39:8] of 40-bit address of the beginning of the ring buffer*/
217 	WREG32(ih_regs->ih_rb_base, ih->gpu_addr >> 8);
218 	WREG32(ih_regs->ih_rb_base_hi, (ih->gpu_addr >> 40) & 0xff);
219 
220 	tmp = RREG32(ih_regs->ih_rb_cntl);
221 	tmp = vega10_ih_rb_cntl(ih, tmp);
222 	if (ih == &adev->irq.ih)
223 		tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RPTR_REARM, !!adev->irq.msi_enabled);
224 	if (ih == &adev->irq.ih1)
225 		tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_FULL_DRAIN_ENABLE, 1);
226 	if (amdgpu_sriov_vf(adev)) {
227 		if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp)) {
228 			dev_err(adev->dev, "PSP program IH_RB_CNTL failed!\n");
229 			return -ETIMEDOUT;
230 		}
231 	} else {
232 		WREG32(ih_regs->ih_rb_cntl, tmp);
233 	}
234 
235 	if (ih == &adev->irq.ih) {
236 		/* set the ih ring 0 writeback address whether it's enabled or not */
237 		WREG32(ih_regs->ih_rb_wptr_addr_lo, lower_32_bits(ih->wptr_addr));
238 		WREG32(ih_regs->ih_rb_wptr_addr_hi, upper_32_bits(ih->wptr_addr) & 0xFFFF);
239 	}
240 
241 	/* set rptr, wptr to 0 */
242 	WREG32(ih_regs->ih_rb_wptr, 0);
243 	WREG32(ih_regs->ih_rb_rptr, 0);
244 
245 	WREG32(ih_regs->ih_doorbell_rptr, vega10_ih_doorbell_rptr(ih));
246 
247 	return 0;
248 }
249 
250 /**
251  * vega10_ih_irq_init - init and enable the interrupt ring
252  *
253  * @adev: amdgpu_device pointer
254  *
255  * Allocate a ring buffer for the interrupt controller,
256  * enable the RLC, disable interrupts, enable the IH
257  * ring buffer and enable it (VI).
258  * Called at device load and reume.
259  * Returns 0 for success, errors for failure.
260  */
261 static int vega10_ih_irq_init(struct amdgpu_device *adev)
262 {
263 	struct amdgpu_ih_ring *ih[] = {&adev->irq.ih, &adev->irq.ih1, &adev->irq.ih2};
264 	u32 ih_chicken;
265 	int ret;
266 	int i;
267 
268 	/* disable irqs */
269 	ret = vega10_ih_toggle_interrupts(adev, false);
270 	if (ret)
271 		return ret;
272 
273 	adev->nbio.funcs->ih_control(adev);
274 
275 	if (adev->asic_type == CHIP_RENOIR) {
276 		ih_chicken = RREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN);
277 		if (adev->irq.ih.use_bus_addr) {
278 			ih_chicken = REG_SET_FIELD(ih_chicken, IH_CHICKEN,
279 						   MC_SPACE_GPA_ENABLE, 1);
280 		}
281 		WREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN, ih_chicken);
282 	}
283 
284 	for (i = 0; i < ARRAY_SIZE(ih); i++) {
285 		if (ih[i]->ring_size) {
286 			ret = vega10_ih_enable_ring(adev, ih[i]);
287 			if (ret)
288 				return ret;
289 		}
290 	}
291 
292 	pci_set_master(adev->pdev);
293 
294 	/* enable interrupts */
295 	ret = vega10_ih_toggle_interrupts(adev, true);
296 	if (ret)
297 		return ret;
298 
299 	if (adev->irq.ih_soft.ring_size)
300 		adev->irq.ih_soft.enabled = true;
301 
302 	return 0;
303 }
304 
305 /**
306  * vega10_ih_irq_disable - disable interrupts
307  *
308  * @adev: amdgpu_device pointer
309  *
310  * Disable interrupts on the hw (VEGA10).
311  */
312 static void vega10_ih_irq_disable(struct amdgpu_device *adev)
313 {
314 	vega10_ih_toggle_interrupts(adev, false);
315 
316 	/* Wait and acknowledge irq */
317 	mdelay(1);
318 }
319 
320 /**
321  * vega10_ih_get_wptr - get the IH ring buffer wptr
322  *
323  * @adev: amdgpu_device pointer
324  * @ih: IH ring buffer to fetch wptr
325  *
326  * Get the IH ring buffer wptr from either the register
327  * or the writeback memory buffer (VEGA10).  Also check for
328  * ring buffer overflow and deal with it.
329  * Returns the value of the wptr.
330  */
331 static u32 vega10_ih_get_wptr(struct amdgpu_device *adev,
332 			      struct amdgpu_ih_ring *ih)
333 {
334 	u32 wptr, tmp;
335 	struct amdgpu_ih_regs *ih_regs;
336 
337 	if (ih == &adev->irq.ih) {
338 		/* Only ring0 supports writeback. On other rings fall back
339 		 * to register-based code with overflow checking below.
340 		 */
341 		wptr = le32_to_cpu(*ih->wptr_cpu);
342 
343 		if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW))
344 			goto out;
345 	}
346 
347 	ih_regs = &ih->ih_regs;
348 
349 	/* Double check that the overflow wasn't already cleared. */
350 	wptr = RREG32_NO_KIQ(ih_regs->ih_rb_wptr);
351 	if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW))
352 		goto out;
353 
354 	wptr = REG_SET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW, 0);
355 
356 	/* When a ring buffer overflow happen start parsing interrupt
357 	 * from the last not overwritten vector (wptr + 32). Hopefully
358 	 * this should allow us to catchup.
359 	 */
360 	tmp = (wptr + 32) & ih->ptr_mask;
361 	dev_warn(adev->dev, "IH ring buffer overflow "
362 		 "(0x%08X, 0x%08X, 0x%08X)\n",
363 		 wptr, ih->rptr, tmp);
364 	ih->rptr = tmp;
365 
366 	tmp = RREG32_NO_KIQ(ih_regs->ih_rb_cntl);
367 	tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 1);
368 	WREG32_NO_KIQ(ih_regs->ih_rb_cntl, tmp);
369 
370 out:
371 	return (wptr & ih->ptr_mask);
372 }
373 
374 /**
375  * vega10_ih_irq_rearm - rearm IRQ if lost
376  *
377  * @adev: amdgpu_device pointer
378  * @ih: IH ring to match
379  *
380  */
381 static void vega10_ih_irq_rearm(struct amdgpu_device *adev,
382 			       struct amdgpu_ih_ring *ih)
383 {
384 	uint32_t v = 0;
385 	uint32_t i = 0;
386 	struct amdgpu_ih_regs *ih_regs;
387 
388 	ih_regs = &ih->ih_regs;
389 	/* Rearm IRQ / re-wwrite doorbell if doorbell write is lost */
390 	for (i = 0; i < MAX_REARM_RETRY; i++) {
391 		v = RREG32_NO_KIQ(ih_regs->ih_rb_rptr);
392 		if ((v < ih->ring_size) && (v != ih->rptr))
393 			WDOORBELL32(ih->doorbell_index, ih->rptr);
394 		else
395 			break;
396 	}
397 }
398 
399 /**
400  * vega10_ih_set_rptr - set the IH ring buffer rptr
401  *
402  * @adev: amdgpu_device pointer
403  * @ih: IH ring buffer to set rptr
404  *
405  * Set the IH ring buffer rptr.
406  */
407 static void vega10_ih_set_rptr(struct amdgpu_device *adev,
408 			       struct amdgpu_ih_ring *ih)
409 {
410 	struct amdgpu_ih_regs *ih_regs;
411 
412 	if (ih->use_doorbell) {
413 		/* XXX check if swapping is necessary on BE */
414 		*ih->rptr_cpu = ih->rptr;
415 		WDOORBELL32(ih->doorbell_index, ih->rptr);
416 
417 		if (amdgpu_sriov_vf(adev))
418 			vega10_ih_irq_rearm(adev, ih);
419 	} else {
420 		ih_regs = &ih->ih_regs;
421 		WREG32(ih_regs->ih_rb_rptr, ih->rptr);
422 	}
423 }
424 
425 /**
426  * vega10_ih_self_irq - dispatch work for ring 1 and 2
427  *
428  * @adev: amdgpu_device pointer
429  * @source: irq source
430  * @entry: IV with WPTR update
431  *
432  * Update the WPTR from the IV and schedule work to handle the entries.
433  */
434 static int vega10_ih_self_irq(struct amdgpu_device *adev,
435 			      struct amdgpu_irq_src *source,
436 			      struct amdgpu_iv_entry *entry)
437 {
438 	switch (entry->ring_id) {
439 	case 1:
440 		schedule_work(&adev->irq.ih1_work);
441 		break;
442 	case 2:
443 		schedule_work(&adev->irq.ih2_work);
444 		break;
445 	default: break;
446 	}
447 	return 0;
448 }
449 
450 static const struct amdgpu_irq_src_funcs vega10_ih_self_irq_funcs = {
451 	.process = vega10_ih_self_irq,
452 };
453 
454 static void vega10_ih_set_self_irq_funcs(struct amdgpu_device *adev)
455 {
456 	adev->irq.self_irq.num_types = 0;
457 	adev->irq.self_irq.funcs = &vega10_ih_self_irq_funcs;
458 }
459 
460 static int vega10_ih_early_init(void *handle)
461 {
462 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
463 
464 	vega10_ih_set_interrupt_funcs(adev);
465 	vega10_ih_set_self_irq_funcs(adev);
466 	return 0;
467 }
468 
469 static int vega10_ih_sw_init(void *handle)
470 {
471 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
472 	int r;
473 
474 	r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_IH, 0,
475 			      &adev->irq.self_irq);
476 	if (r)
477 		return r;
478 
479 	r = amdgpu_ih_ring_init(adev, &adev->irq.ih, 256 * 1024, true);
480 	if (r)
481 		return r;
482 
483 	adev->irq.ih.use_doorbell = true;
484 	adev->irq.ih.doorbell_index = adev->doorbell_index.ih << 1;
485 
486 	if (!(adev->flags & AMD_IS_APU)) {
487 		r = amdgpu_ih_ring_init(adev, &adev->irq.ih1, PAGE_SIZE, true);
488 		if (r)
489 			return r;
490 
491 		adev->irq.ih1.use_doorbell = true;
492 		adev->irq.ih1.doorbell_index = (adev->doorbell_index.ih + 1) << 1;
493 
494 		r = amdgpu_ih_ring_init(adev, &adev->irq.ih2, PAGE_SIZE, true);
495 		if (r)
496 			return r;
497 
498 		adev->irq.ih2.use_doorbell = true;
499 		adev->irq.ih2.doorbell_index = (adev->doorbell_index.ih + 2) << 1;
500 	}
501 	/* initialize ih control registers offset */
502 	vega10_ih_init_register_offset(adev);
503 
504 	r = amdgpu_ih_ring_init(adev, &adev->irq.ih_soft, PAGE_SIZE, true);
505 	if (r)
506 		return r;
507 
508 	r = amdgpu_irq_init(adev);
509 
510 	return r;
511 }
512 
513 static int vega10_ih_sw_fini(void *handle)
514 {
515 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
516 
517 	amdgpu_irq_fini_sw(adev);
518 
519 	return 0;
520 }
521 
522 static int vega10_ih_hw_init(void *handle)
523 {
524 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
525 
526 	return vega10_ih_irq_init(adev);
527 }
528 
529 static int vega10_ih_hw_fini(void *handle)
530 {
531 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
532 
533 	vega10_ih_irq_disable(adev);
534 
535 	return 0;
536 }
537 
538 static int vega10_ih_suspend(void *handle)
539 {
540 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
541 
542 	return vega10_ih_hw_fini(adev);
543 }
544 
545 static int vega10_ih_resume(void *handle)
546 {
547 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
548 
549 	return vega10_ih_hw_init(adev);
550 }
551 
552 static bool vega10_ih_is_idle(void *handle)
553 {
554 	/* todo */
555 	return true;
556 }
557 
558 static int vega10_ih_wait_for_idle(void *handle)
559 {
560 	/* todo */
561 	return -ETIMEDOUT;
562 }
563 
564 static int vega10_ih_soft_reset(void *handle)
565 {
566 	/* todo */
567 
568 	return 0;
569 }
570 
571 static void vega10_ih_update_clockgating_state(struct amdgpu_device *adev,
572 					       bool enable)
573 {
574 	uint32_t data, def, field_val;
575 
576 	if (adev->cg_flags & AMD_CG_SUPPORT_IH_CG) {
577 		def = data = RREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL);
578 		field_val = enable ? 0 : 1;
579 		/**
580 		 * Vega10/12 and RAVEN don't have IH_BUFFER_MEM_CLK_SOFT_OVERRIDE field.
581 		 */
582 		if (adev->asic_type == CHIP_RENOIR)
583 			data = REG_SET_FIELD(data, IH_CLK_CTRL,
584 				     IH_BUFFER_MEM_CLK_SOFT_OVERRIDE, field_val);
585 
586 		data = REG_SET_FIELD(data, IH_CLK_CTRL,
587 				     DBUS_MUX_CLK_SOFT_OVERRIDE, field_val);
588 		data = REG_SET_FIELD(data, IH_CLK_CTRL,
589 				     OSSSYS_SHARE_CLK_SOFT_OVERRIDE, field_val);
590 		data = REG_SET_FIELD(data, IH_CLK_CTRL,
591 				     LIMIT_SMN_CLK_SOFT_OVERRIDE, field_val);
592 		data = REG_SET_FIELD(data, IH_CLK_CTRL,
593 				     DYN_CLK_SOFT_OVERRIDE, field_val);
594 		data = REG_SET_FIELD(data, IH_CLK_CTRL,
595 				     REG_CLK_SOFT_OVERRIDE, field_val);
596 		if (def != data)
597 			WREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL, data);
598 	}
599 }
600 
601 static int vega10_ih_set_clockgating_state(void *handle,
602 					  enum amd_clockgating_state state)
603 {
604 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
605 
606 	vega10_ih_update_clockgating_state(adev,
607 				state == AMD_CG_STATE_GATE);
608 	return 0;
609 
610 }
611 
612 static int vega10_ih_set_powergating_state(void *handle,
613 					  enum amd_powergating_state state)
614 {
615 	return 0;
616 }
617 
618 const struct amd_ip_funcs vega10_ih_ip_funcs = {
619 	.name = "vega10_ih",
620 	.early_init = vega10_ih_early_init,
621 	.late_init = NULL,
622 	.sw_init = vega10_ih_sw_init,
623 	.sw_fini = vega10_ih_sw_fini,
624 	.hw_init = vega10_ih_hw_init,
625 	.hw_fini = vega10_ih_hw_fini,
626 	.suspend = vega10_ih_suspend,
627 	.resume = vega10_ih_resume,
628 	.is_idle = vega10_ih_is_idle,
629 	.wait_for_idle = vega10_ih_wait_for_idle,
630 	.soft_reset = vega10_ih_soft_reset,
631 	.set_clockgating_state = vega10_ih_set_clockgating_state,
632 	.set_powergating_state = vega10_ih_set_powergating_state,
633 };
634 
635 static const struct amdgpu_ih_funcs vega10_ih_funcs = {
636 	.get_wptr = vega10_ih_get_wptr,
637 	.decode_iv = amdgpu_ih_decode_iv_helper,
638 	.decode_iv_ts = amdgpu_ih_decode_iv_ts_helper,
639 	.set_rptr = vega10_ih_set_rptr
640 };
641 
642 static void vega10_ih_set_interrupt_funcs(struct amdgpu_device *adev)
643 {
644 	adev->irq.ih_funcs = &vega10_ih_funcs;
645 }
646 
647 const struct amdgpu_ip_block_version vega10_ih_ip_block =
648 {
649 	.type = AMD_IP_BLOCK_TYPE_IH,
650 	.major = 4,
651 	.minor = 0,
652 	.rev = 0,
653 	.funcs = &vega10_ih_ip_funcs,
654 };
655