1 /*
2  * Copyright 2020 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_2_0_offset.h"
31 #include "oss/osssys_4_2_0_sh_mask.h"
32 
33 #include "soc15_common.h"
34 #include "vega20_ih.h"
35 
36 #define MAX_REARM_RETRY 10
37 
38 #define mmIH_CHICKEN_ALDEBARAN			0x18d
39 #define mmIH_CHICKEN_ALDEBARAN_BASE_IDX		0
40 
41 #define mmIH_RETRY_INT_CAM_CNTL_ALDEBARAN		0x00ea
42 #define mmIH_RETRY_INT_CAM_CNTL_ALDEBARAN_BASE_IDX	0
43 #define IH_RETRY_INT_CAM_CNTL_ALDEBARAN__ENABLE__SHIFT	0x10
44 #define IH_RETRY_INT_CAM_CNTL_ALDEBARAN__ENABLE_MASK	0x00010000L
45 
46 static void vega20_ih_set_interrupt_funcs(struct amdgpu_device *adev);
47 
48 /**
49  * vega20_ih_init_register_offset - Initialize register offset for ih rings
50  *
51  * @adev: amdgpu_device pointer
52  *
53  * Initialize register offset ih rings (VEGA20).
54  */
55 static void vega20_ih_init_register_offset(struct amdgpu_device *adev)
56 {
57 	struct amdgpu_ih_regs *ih_regs;
58 
59 	if (adev->irq.ih.ring_size) {
60 		ih_regs = &adev->irq.ih.ih_regs;
61 		ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE);
62 		ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI);
63 		ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL);
64 		ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR);
65 		ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR);
66 		ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR);
67 		ih_regs->ih_rb_wptr_addr_lo = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_ADDR_LO);
68 		ih_regs->ih_rb_wptr_addr_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_ADDR_HI);
69 		ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL;
70 	}
71 
72 	if (adev->irq.ih1.ring_size) {
73 		ih_regs = &adev->irq.ih1.ih_regs;
74 		ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_RING1);
75 		ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI_RING1);
76 		ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL_RING1);
77 		ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_RING1);
78 		ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR_RING1);
79 		ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR_RING1);
80 		ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL_RING1;
81 	}
82 
83 	if (adev->irq.ih2.ring_size) {
84 		ih_regs = &adev->irq.ih2.ih_regs;
85 		ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_RING2);
86 		ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI_RING2);
87 		ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL_RING2);
88 		ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_RING2);
89 		ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR_RING2);
90 		ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR_RING2);
91 		ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL_RING2;
92 	}
93 }
94 
95 /**
96  * vega20_ih_toggle_ring_interrupts - toggle the interrupt ring buffer
97  *
98  * @adev: amdgpu_device pointer
99  * @ih: amdgpu_ih_ring pointer
100  * @enable: true - enable the interrupts, false - disable the interrupts
101  *
102  * Toggle the interrupt ring buffer (VEGA20)
103  */
104 static int vega20_ih_toggle_ring_interrupts(struct amdgpu_device *adev,
105 					    struct amdgpu_ih_ring *ih,
106 					    bool enable)
107 {
108 	struct amdgpu_ih_regs *ih_regs;
109 	uint32_t tmp;
110 
111 	ih_regs = &ih->ih_regs;
112 
113 	tmp = RREG32(ih_regs->ih_rb_cntl);
114 	tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_ENABLE, (enable ? 1 : 0));
115 	tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_GPU_TS_ENABLE, 1);
116 
117 	/* enable_intr field is only valid in ring0 */
118 	if (ih == &adev->irq.ih)
119 		tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, ENABLE_INTR, (enable ? 1 : 0));
120 	if (amdgpu_sriov_vf(adev)) {
121 		if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp)) {
122 			dev_err(adev->dev, "PSP program IH_RB_CNTL failed!\n");
123 			return -ETIMEDOUT;
124 		}
125 	} else {
126 		WREG32(ih_regs->ih_rb_cntl, tmp);
127 	}
128 
129 	if (enable) {
130 		ih->enabled = true;
131 	} else {
132 		/* set rptr, wptr to 0 */
133 		WREG32(ih_regs->ih_rb_rptr, 0);
134 		WREG32(ih_regs->ih_rb_wptr, 0);
135 		ih->enabled = false;
136 		ih->rptr = 0;
137 	}
138 
139 	return 0;
140 }
141 
142 /**
143  * vega20_ih_toggle_interrupts - Toggle all the available interrupt ring buffers
144  *
145  * @adev: amdgpu_device pointer
146  * @enable: enable or disable interrupt ring buffers
147  *
148  * Toggle all the available interrupt ring buffers (VEGA20).
149  */
150 static int vega20_ih_toggle_interrupts(struct amdgpu_device *adev, bool enable)
151 {
152 	struct amdgpu_ih_ring *ih[] = {&adev->irq.ih, &adev->irq.ih1, &adev->irq.ih2};
153 	int i;
154 	int r;
155 
156 	for (i = 0; i < ARRAY_SIZE(ih); i++) {
157 		if (ih[i]->ring_size) {
158 			r = vega20_ih_toggle_ring_interrupts(adev, ih[i], enable);
159 			if (r)
160 				return r;
161 		}
162 	}
163 
164 	return 0;
165 }
166 
167 static uint32_t vega20_ih_rb_cntl(struct amdgpu_ih_ring *ih, uint32_t ih_rb_cntl)
168 {
169 	int rb_bufsz = order_base_2(ih->ring_size / 4);
170 
171 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
172 				   MC_SPACE, ih->use_bus_addr ? 1 : 4);
173 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
174 				   WPTR_OVERFLOW_CLEAR, 1);
175 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
176 				   WPTR_OVERFLOW_ENABLE, 1);
177 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RB_SIZE, rb_bufsz);
178 	/* Ring Buffer write pointer writeback. If enabled, IH_RB_WPTR register
179 	 * value is written to memory
180 	 */
181 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
182 				   WPTR_WRITEBACK_ENABLE, 1);
183 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_SNOOP, 1);
184 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_RO, 0);
185 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_VMID, 0);
186 
187 	return ih_rb_cntl;
188 }
189 
190 static uint32_t vega20_ih_doorbell_rptr(struct amdgpu_ih_ring *ih)
191 {
192 	u32 ih_doorbell_rtpr = 0;
193 
194 	if (ih->use_doorbell) {
195 		ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr,
196 						 IH_DOORBELL_RPTR, OFFSET,
197 						 ih->doorbell_index);
198 		ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr,
199 						 IH_DOORBELL_RPTR,
200 						 ENABLE, 1);
201 	} else {
202 		ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr,
203 						 IH_DOORBELL_RPTR,
204 						 ENABLE, 0);
205 	}
206 	return ih_doorbell_rtpr;
207 }
208 
209 /**
210  * vega20_ih_enable_ring - enable an ih ring buffer
211  *
212  * @adev: amdgpu_device pointer
213  * @ih: amdgpu_ih_ring pointer
214  *
215  * Enable an ih ring buffer (VEGA20)
216  */
217 static int vega20_ih_enable_ring(struct amdgpu_device *adev,
218 				 struct amdgpu_ih_ring *ih)
219 {
220 	struct amdgpu_ih_regs *ih_regs;
221 	uint32_t tmp;
222 
223 	ih_regs = &ih->ih_regs;
224 
225 	/* Ring Buffer base. [39:8] of 40-bit address of the beginning of the ring buffer*/
226 	WREG32(ih_regs->ih_rb_base, ih->gpu_addr >> 8);
227 	WREG32(ih_regs->ih_rb_base_hi, (ih->gpu_addr >> 40) & 0xff);
228 
229 	tmp = RREG32(ih_regs->ih_rb_cntl);
230 	tmp = vega20_ih_rb_cntl(ih, tmp);
231 	if (ih == &adev->irq.ih)
232 		tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RPTR_REARM, !!adev->irq.msi_enabled);
233 	if (ih == &adev->irq.ih1)
234 		tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_FULL_DRAIN_ENABLE, 1);
235 	if (amdgpu_sriov_vf(adev)) {
236 		if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp)) {
237 			dev_err(adev->dev, "PSP program IH_RB_CNTL failed!\n");
238 			return -ETIMEDOUT;
239 		}
240 	} else {
241 		WREG32(ih_regs->ih_rb_cntl, tmp);
242 	}
243 
244 	if (ih == &adev->irq.ih) {
245 		/* set the ih ring 0 writeback address whether it's enabled or not */
246 		WREG32(ih_regs->ih_rb_wptr_addr_lo, lower_32_bits(ih->wptr_addr));
247 		WREG32(ih_regs->ih_rb_wptr_addr_hi, upper_32_bits(ih->wptr_addr) & 0xFFFF);
248 	}
249 
250 	/* set rptr, wptr to 0 */
251 	WREG32(ih_regs->ih_rb_wptr, 0);
252 	WREG32(ih_regs->ih_rb_rptr, 0);
253 
254 	WREG32(ih_regs->ih_doorbell_rptr, vega20_ih_doorbell_rptr(ih));
255 
256 	return 0;
257 }
258 
259 static uint32_t vega20_setup_retry_doorbell(u32 doorbell_index)
260 {
261 	u32 val = 0;
262 
263 	val = REG_SET_FIELD(val, IH_DOORBELL_RPTR, OFFSET, doorbell_index);
264 	val = REG_SET_FIELD(val, IH_DOORBELL_RPTR, ENABLE, 1);
265 
266 	return val;
267 }
268 
269 /**
270  * vega20_ih_irq_init - init and enable the interrupt ring
271  *
272  * @adev: amdgpu_device pointer
273  *
274  * Allocate a ring buffer for the interrupt controller,
275  * enable the RLC, disable interrupts, enable the IH
276  * ring buffer and enable it (VI).
277  * Called at device load and reume.
278  * Returns 0 for success, errors for failure.
279  */
280 static int vega20_ih_irq_init(struct amdgpu_device *adev)
281 {
282 	struct amdgpu_ih_ring *ih[] = {&adev->irq.ih, &adev->irq.ih1, &adev->irq.ih2};
283 	u32 ih_chicken;
284 	int ret;
285 	int i;
286 
287 	/* disable irqs */
288 	ret = vega20_ih_toggle_interrupts(adev, false);
289 	if (ret)
290 		return ret;
291 
292 	adev->nbio.funcs->ih_control(adev);
293 
294 	if ((adev->ip_versions[OSSSYS_HWIP][0] == IP_VERSION(4, 2, 1)) &&
295 	    adev->firmware.load_type == AMDGPU_FW_LOAD_DIRECT) {
296 		ih_chicken = RREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN);
297 		if (adev->irq.ih.use_bus_addr) {
298 			ih_chicken = REG_SET_FIELD(ih_chicken, IH_CHICKEN,
299 						   MC_SPACE_GPA_ENABLE, 1);
300 		}
301 		WREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN, ih_chicken);
302 	}
303 
304 	/* psp firmware won't program IH_CHICKEN for aldebaran
305 	 * driver needs to program it properly according to
306 	 * MC_SPACE type in IH_RB_CNTL */
307 	if ((adev->ip_versions[OSSSYS_HWIP][0] == IP_VERSION(4, 4, 0)) ||
308 	    (adev->ip_versions[OSSSYS_HWIP][0] == IP_VERSION(4, 4, 2))) {
309 		ih_chicken = RREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN_ALDEBARAN);
310 		if (adev->irq.ih.use_bus_addr) {
311 			ih_chicken = REG_SET_FIELD(ih_chicken, IH_CHICKEN,
312 						   MC_SPACE_GPA_ENABLE, 1);
313 		}
314 		WREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN_ALDEBARAN, ih_chicken);
315 	}
316 
317 	for (i = 0; i < ARRAY_SIZE(ih); i++) {
318 		if (ih[i]->ring_size) {
319 			ret = vega20_ih_enable_ring(adev, ih[i]);
320 			if (ret)
321 				return ret;
322 		}
323 	}
324 
325 	if (!amdgpu_sriov_vf(adev))
326 		adev->nbio.funcs->ih_doorbell_range(adev, adev->irq.ih.use_doorbell,
327 						    adev->irq.ih.doorbell_index);
328 
329 	pci_set_master(adev->pdev);
330 
331 	/* Allocate the doorbell for IH Retry CAM */
332 	adev->irq.retry_cam_doorbell_index = (adev->doorbell_index.ih + 3) << 1;
333 	WREG32_SOC15(OSSSYS, 0, mmIH_DOORBELL_RETRY_CAM,
334 		vega20_setup_retry_doorbell(adev->irq.retry_cam_doorbell_index));
335 
336 	/* Enable IH Retry CAM */
337 	if (adev->ip_versions[OSSSYS_HWIP][0] == IP_VERSION(4, 4, 0) ||
338 	    adev->ip_versions[OSSSYS_HWIP][0] == IP_VERSION(4, 4, 2))
339 		WREG32_FIELD15(OSSSYS, 0, IH_RETRY_INT_CAM_CNTL_ALDEBARAN,
340 			       ENABLE, 1);
341 	else
342 		WREG32_FIELD15(OSSSYS, 0, IH_RETRY_INT_CAM_CNTL, ENABLE, 1);
343 
344 	adev->irq.retry_cam_enabled = true;
345 
346 	/* enable interrupts */
347 	ret = vega20_ih_toggle_interrupts(adev, true);
348 	if (ret)
349 		return ret;
350 
351 	if (adev->irq.ih_soft.ring_size)
352 		adev->irq.ih_soft.enabled = true;
353 
354 	return 0;
355 }
356 
357 /**
358  * vega20_ih_irq_disable - disable interrupts
359  *
360  * @adev: amdgpu_device pointer
361  *
362  * Disable interrupts on the hw (VEGA20).
363  */
364 static void vega20_ih_irq_disable(struct amdgpu_device *adev)
365 {
366 	vega20_ih_toggle_interrupts(adev, false);
367 
368 	/* Wait and acknowledge irq */
369 	mdelay(1);
370 }
371 
372 /**
373  * vega20_ih_get_wptr - get the IH ring buffer wptr
374  *
375  * @adev: amdgpu_device pointer
376  * @ih: amdgpu_ih_ring pointer
377  *
378  * Get the IH ring buffer wptr from either the register
379  * or the writeback memory buffer (VEGA20).  Also check for
380  * ring buffer overflow and deal with it.
381  * Returns the value of the wptr.
382  */
383 static u32 vega20_ih_get_wptr(struct amdgpu_device *adev,
384 			      struct amdgpu_ih_ring *ih)
385 {
386 	u32 wptr, tmp;
387 	struct amdgpu_ih_regs *ih_regs;
388 
389 	if (ih == &adev->irq.ih || ih == &adev->irq.ih_soft) {
390 		/* Only ring0 supports writeback. On other rings fall back
391 		 * to register-based code with overflow checking below.
392 		 * ih_soft ring doesn't have any backing hardware registers,
393 		 * update wptr and return.
394 		 */
395 		wptr = le32_to_cpu(*ih->wptr_cpu);
396 
397 		if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW))
398 			goto out;
399 	}
400 
401 	ih_regs = &ih->ih_regs;
402 
403 	/* Double check that the overflow wasn't already cleared. */
404 	wptr = RREG32_NO_KIQ(ih_regs->ih_rb_wptr);
405 	if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW))
406 		goto out;
407 
408 	wptr = REG_SET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW, 0);
409 
410 	/* When a ring buffer overflow happen start parsing interrupt
411 	 * from the last not overwritten vector (wptr + 32). Hopefully
412 	 * this should allow us to catchup.
413 	 */
414 	tmp = (wptr + 32) & ih->ptr_mask;
415 	dev_warn(adev->dev, "IH ring buffer overflow "
416 		 "(0x%08X, 0x%08X, 0x%08X)\n",
417 		 wptr, ih->rptr, tmp);
418 	ih->rptr = tmp;
419 
420 	tmp = RREG32_NO_KIQ(ih_regs->ih_rb_cntl);
421 	tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 1);
422 	WREG32_NO_KIQ(ih_regs->ih_rb_cntl, tmp);
423 
424 out:
425 	return (wptr & ih->ptr_mask);
426 }
427 
428 /**
429  * vega20_ih_irq_rearm - rearm IRQ if lost
430  *
431  * @adev: amdgpu_device pointer
432  * @ih: amdgpu_ih_ring pointer
433  *
434  */
435 static void vega20_ih_irq_rearm(struct amdgpu_device *adev,
436 			       struct amdgpu_ih_ring *ih)
437 {
438 	uint32_t v = 0;
439 	uint32_t i = 0;
440 	struct amdgpu_ih_regs *ih_regs;
441 
442 	ih_regs = &ih->ih_regs;
443 
444 	/* Rearm IRQ / re-wwrite doorbell if doorbell write is lost */
445 	for (i = 0; i < MAX_REARM_RETRY; i++) {
446 		v = RREG32_NO_KIQ(ih_regs->ih_rb_rptr);
447 		if ((v < ih->ring_size) && (v != ih->rptr))
448 			WDOORBELL32(ih->doorbell_index, ih->rptr);
449 		else
450 			break;
451 	}
452 }
453 
454 /**
455  * vega20_ih_set_rptr - set the IH ring buffer rptr
456  *
457  * @adev: amdgpu_device pointer
458  * @ih: amdgpu_ih_ring pointer
459  *
460  * Set the IH ring buffer rptr.
461  */
462 static void vega20_ih_set_rptr(struct amdgpu_device *adev,
463 			       struct amdgpu_ih_ring *ih)
464 {
465 	struct amdgpu_ih_regs *ih_regs;
466 
467 	if (ih == &adev->irq.ih_soft)
468 		return;
469 
470 	if (ih->use_doorbell) {
471 		/* XXX check if swapping is necessary on BE */
472 		*ih->rptr_cpu = ih->rptr;
473 		WDOORBELL32(ih->doorbell_index, ih->rptr);
474 
475 		if (amdgpu_sriov_vf(adev))
476 			vega20_ih_irq_rearm(adev, ih);
477 	} else {
478 		ih_regs = &ih->ih_regs;
479 		WREG32(ih_regs->ih_rb_rptr, ih->rptr);
480 	}
481 }
482 
483 /**
484  * vega20_ih_self_irq - dispatch work for ring 1 and 2
485  *
486  * @adev: amdgpu_device pointer
487  * @source: irq source
488  * @entry: IV with WPTR update
489  *
490  * Update the WPTR from the IV and schedule work to handle the entries.
491  */
492 static int vega20_ih_self_irq(struct amdgpu_device *adev,
493 			      struct amdgpu_irq_src *source,
494 			      struct amdgpu_iv_entry *entry)
495 {
496 	switch (entry->ring_id) {
497 	case 1:
498 		schedule_work(&adev->irq.ih1_work);
499 		break;
500 	case 2:
501 		schedule_work(&adev->irq.ih2_work);
502 		break;
503 	default:
504 		break;
505 	}
506 	return 0;
507 }
508 
509 static const struct amdgpu_irq_src_funcs vega20_ih_self_irq_funcs = {
510 	.process = vega20_ih_self_irq,
511 };
512 
513 static void vega20_ih_set_self_irq_funcs(struct amdgpu_device *adev)
514 {
515 	adev->irq.self_irq.num_types = 0;
516 	adev->irq.self_irq.funcs = &vega20_ih_self_irq_funcs;
517 }
518 
519 static int vega20_ih_early_init(void *handle)
520 {
521 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
522 
523 	vega20_ih_set_interrupt_funcs(adev);
524 	vega20_ih_set_self_irq_funcs(adev);
525 	return 0;
526 }
527 
528 static int vega20_ih_sw_init(void *handle)
529 {
530 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
531 	bool use_bus_addr = true;
532 	int r;
533 
534 	r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_IH, 0,
535 			      &adev->irq.self_irq);
536 	if (r)
537 		return r;
538 
539 	if ((adev->flags & AMD_IS_APU) &&
540 	    (adev->ip_versions[OSSSYS_HWIP][0] == IP_VERSION(4, 4, 2)))
541 		use_bus_addr = false;
542 
543 	r = amdgpu_ih_ring_init(adev, &adev->irq.ih, IH_RING_SIZE, use_bus_addr);
544 	if (r)
545 		return r;
546 
547 	adev->irq.ih.use_doorbell = true;
548 	adev->irq.ih.doorbell_index = adev->doorbell_index.ih << 1;
549 
550 	r = amdgpu_ih_ring_init(adev, &adev->irq.ih1, PAGE_SIZE, use_bus_addr);
551 	if (r)
552 		return r;
553 
554 	adev->irq.ih1.use_doorbell = true;
555 	adev->irq.ih1.doorbell_index = (adev->doorbell_index.ih + 1) << 1;
556 
557 	if (adev->ip_versions[OSSSYS_HWIP][0] != IP_VERSION(4, 4, 2)) {
558 		r = amdgpu_ih_ring_init(adev, &adev->irq.ih2, PAGE_SIZE, true);
559 		if (r)
560 			return r;
561 
562 		adev->irq.ih2.use_doorbell = true;
563 		adev->irq.ih2.doorbell_index = (adev->doorbell_index.ih + 2) << 1;
564 	}
565 
566 	/* initialize ih control registers offset */
567 	vega20_ih_init_register_offset(adev);
568 
569 	r = amdgpu_ih_ring_init(adev, &adev->irq.ih_soft, IH_SW_RING_SIZE, use_bus_addr);
570 	if (r)
571 		return r;
572 
573 	r = amdgpu_irq_init(adev);
574 
575 	return r;
576 }
577 
578 static int vega20_ih_sw_fini(void *handle)
579 {
580 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
581 
582 	amdgpu_irq_fini_sw(adev);
583 
584 	return 0;
585 }
586 
587 static int vega20_ih_hw_init(void *handle)
588 {
589 	int r;
590 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
591 
592 	r = vega20_ih_irq_init(adev);
593 	if (r)
594 		return r;
595 
596 	return 0;
597 }
598 
599 static int vega20_ih_hw_fini(void *handle)
600 {
601 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
602 
603 	vega20_ih_irq_disable(adev);
604 
605 	return 0;
606 }
607 
608 static int vega20_ih_suspend(void *handle)
609 {
610 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
611 
612 	return vega20_ih_hw_fini(adev);
613 }
614 
615 static int vega20_ih_resume(void *handle)
616 {
617 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
618 
619 	return vega20_ih_hw_init(adev);
620 }
621 
622 static bool vega20_ih_is_idle(void *handle)
623 {
624 	/* todo */
625 	return true;
626 }
627 
628 static int vega20_ih_wait_for_idle(void *handle)
629 {
630 	/* todo */
631 	return -ETIMEDOUT;
632 }
633 
634 static int vega20_ih_soft_reset(void *handle)
635 {
636 	/* todo */
637 
638 	return 0;
639 }
640 
641 static void vega20_ih_update_clockgating_state(struct amdgpu_device *adev,
642 					       bool enable)
643 {
644 	uint32_t data, def, field_val;
645 
646 	if (adev->cg_flags & AMD_CG_SUPPORT_IH_CG) {
647 		def = data = RREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL);
648 		field_val = enable ? 0 : 1;
649 		data = REG_SET_FIELD(data, IH_CLK_CTRL,
650 				     IH_RETRY_INT_CAM_MEM_CLK_SOFT_OVERRIDE, field_val);
651 		data = REG_SET_FIELD(data, IH_CLK_CTRL,
652 				     IH_BUFFER_MEM_CLK_SOFT_OVERRIDE, field_val);
653 		data = REG_SET_FIELD(data, IH_CLK_CTRL,
654 				     DBUS_MUX_CLK_SOFT_OVERRIDE, field_val);
655 		data = REG_SET_FIELD(data, IH_CLK_CTRL,
656 				     OSSSYS_SHARE_CLK_SOFT_OVERRIDE, field_val);
657 		data = REG_SET_FIELD(data, IH_CLK_CTRL,
658 				     LIMIT_SMN_CLK_SOFT_OVERRIDE, field_val);
659 		data = REG_SET_FIELD(data, IH_CLK_CTRL,
660 				     DYN_CLK_SOFT_OVERRIDE, field_val);
661 		data = REG_SET_FIELD(data, IH_CLK_CTRL,
662 				     REG_CLK_SOFT_OVERRIDE, field_val);
663 		if (def != data)
664 			WREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL, data);
665 	}
666 }
667 
668 static int vega20_ih_set_clockgating_state(void *handle,
669 					  enum amd_clockgating_state state)
670 {
671 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
672 
673 	vega20_ih_update_clockgating_state(adev,
674 				state == AMD_CG_STATE_GATE);
675 	return 0;
676 
677 }
678 
679 static int vega20_ih_set_powergating_state(void *handle,
680 					  enum amd_powergating_state state)
681 {
682 	return 0;
683 }
684 
685 const struct amd_ip_funcs vega20_ih_ip_funcs = {
686 	.name = "vega20_ih",
687 	.early_init = vega20_ih_early_init,
688 	.late_init = NULL,
689 	.sw_init = vega20_ih_sw_init,
690 	.sw_fini = vega20_ih_sw_fini,
691 	.hw_init = vega20_ih_hw_init,
692 	.hw_fini = vega20_ih_hw_fini,
693 	.suspend = vega20_ih_suspend,
694 	.resume = vega20_ih_resume,
695 	.is_idle = vega20_ih_is_idle,
696 	.wait_for_idle = vega20_ih_wait_for_idle,
697 	.soft_reset = vega20_ih_soft_reset,
698 	.set_clockgating_state = vega20_ih_set_clockgating_state,
699 	.set_powergating_state = vega20_ih_set_powergating_state,
700 };
701 
702 static const struct amdgpu_ih_funcs vega20_ih_funcs = {
703 	.get_wptr = vega20_ih_get_wptr,
704 	.decode_iv = amdgpu_ih_decode_iv_helper,
705 	.decode_iv_ts = amdgpu_ih_decode_iv_ts_helper,
706 	.set_rptr = vega20_ih_set_rptr
707 };
708 
709 static void vega20_ih_set_interrupt_funcs(struct amdgpu_device *adev)
710 {
711 	adev->irq.ih_funcs = &vega20_ih_funcs;
712 }
713 
714 const struct amdgpu_ip_block_version vega20_ih_ip_block = {
715 	.type = AMD_IP_BLOCK_TYPE_IH,
716 	.major = 4,
717 	.minor = 2,
718 	.rev = 0,
719 	.funcs = &vega20_ih_ip_funcs,
720 };
721