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 
24 #include <linux/pci.h>
25 
26 #include "amdgpu.h"
27 #include "amdgpu_ih.h"
28 
29 #include "oss/osssys_5_0_0_offset.h"
30 #include "oss/osssys_5_0_0_sh_mask.h"
31 
32 #include "soc15_common.h"
33 #include "navi10_ih.h"
34 
35 #define MAX_REARM_RETRY 10
36 
37 #define mmIH_CHICKEN_Sienna_Cichlid                 0x018d
38 #define mmIH_CHICKEN_Sienna_Cichlid_BASE_IDX        0
39 
40 static void navi10_ih_set_interrupt_funcs(struct amdgpu_device *adev);
41 
42 /**
43  * navi10_ih_init_register_offset - Initialize register offset for ih rings
44  *
45  * @adev: amdgpu_device pointer
46  *
47  * Initialize register offset ih rings (NAVI10).
48  */
navi10_ih_init_register_offset(struct amdgpu_device * adev)49 static void navi10_ih_init_register_offset(struct amdgpu_device *adev)
50 {
51 	struct amdgpu_ih_regs *ih_regs;
52 
53 	if (adev->irq.ih.ring_size) {
54 		ih_regs = &adev->irq.ih.ih_regs;
55 		ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE);
56 		ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI);
57 		ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL);
58 		ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR);
59 		ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR);
60 		ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR);
61 		ih_regs->ih_rb_wptr_addr_lo = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_ADDR_LO);
62 		ih_regs->ih_rb_wptr_addr_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_ADDR_HI);
63 		ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL;
64 	}
65 
66 	if (adev->irq.ih1.ring_size) {
67 		ih_regs = &adev->irq.ih1.ih_regs;
68 		ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_RING1);
69 		ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI_RING1);
70 		ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL_RING1);
71 		ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_RING1);
72 		ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR_RING1);
73 		ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR_RING1);
74 		ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL_RING1;
75 	}
76 
77 	if (adev->irq.ih2.ring_size) {
78 		ih_regs = &adev->irq.ih2.ih_regs;
79 		ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_RING2);
80 		ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI_RING2);
81 		ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL_RING2);
82 		ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_RING2);
83 		ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR_RING2);
84 		ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR_RING2);
85 		ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL_RING2;
86 	}
87 }
88 
89 /**
90  * force_update_wptr_for_self_int - Force update the wptr for self interrupt
91  *
92  * @adev: amdgpu_device pointer
93  * @threshold: threshold to trigger the wptr reporting
94  * @timeout: timeout to trigger the wptr reporting
95  * @enabled: Enable/disable timeout flush mechanism
96  *
97  * threshold input range: 0 ~ 15, default 0,
98  * real_threshold = 2^threshold
99  * timeout input range: 0 ~ 20, default 8,
100  * real_timeout = (2^timeout) * 1024 / (socclk_freq)
101  *
102  * Force update wptr for self interrupt ( >= SIENNA_CICHLID).
103  */
104 static void
force_update_wptr_for_self_int(struct amdgpu_device * adev,u32 threshold,u32 timeout,bool enabled)105 force_update_wptr_for_self_int(struct amdgpu_device *adev,
106 			       u32 threshold, u32 timeout, bool enabled)
107 {
108 	u32 ih_cntl, ih_rb_cntl;
109 
110 	if (adev->ip_versions[OSSSYS_HWIP][0] < IP_VERSION(5, 0, 3))
111 		return;
112 
113 	ih_cntl = RREG32_SOC15(OSSSYS, 0, mmIH_CNTL2);
114 	ih_rb_cntl = RREG32_SOC15(OSSSYS, 0, mmIH_RB_CNTL_RING1);
115 
116 	ih_cntl = REG_SET_FIELD(ih_cntl, IH_CNTL2,
117 				SELF_IV_FORCE_WPTR_UPDATE_TIMEOUT, timeout);
118 	ih_cntl = REG_SET_FIELD(ih_cntl, IH_CNTL2,
119 				SELF_IV_FORCE_WPTR_UPDATE_ENABLE, enabled);
120 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL_RING1,
121 				   RB_USED_INT_THRESHOLD, threshold);
122 
123 	if (amdgpu_sriov_vf(adev) && amdgpu_sriov_reg_indirect_ih(adev)) {
124 		if (psp_reg_program(&adev->psp, PSP_REG_IH_RB_CNTL_RING1, ih_rb_cntl))
125 			return;
126 	} else {
127 		WREG32_SOC15(OSSSYS, 0, mmIH_RB_CNTL_RING1, ih_rb_cntl);
128 	}
129 
130 	ih_rb_cntl = RREG32_SOC15(OSSSYS, 0, mmIH_RB_CNTL_RING2);
131 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL_RING2,
132 				   RB_USED_INT_THRESHOLD, threshold);
133 	if (amdgpu_sriov_vf(adev) && amdgpu_sriov_reg_indirect_ih(adev)) {
134 		if (psp_reg_program(&adev->psp, PSP_REG_IH_RB_CNTL_RING2, ih_rb_cntl))
135 			return;
136 	} else {
137 		WREG32_SOC15(OSSSYS, 0, mmIH_RB_CNTL_RING2, ih_rb_cntl);
138 	}
139 
140 	WREG32_SOC15(OSSSYS, 0, mmIH_CNTL2, ih_cntl);
141 }
142 
143 /**
144  * navi10_ih_toggle_ring_interrupts - toggle the interrupt ring buffer
145  *
146  * @adev: amdgpu_device pointer
147  * @ih: amdgpu_ih_ring pointet
148  * @enable: true - enable the interrupts, false - disable the interrupts
149  *
150  * Toggle the interrupt ring buffer (NAVI10)
151  */
navi10_ih_toggle_ring_interrupts(struct amdgpu_device * adev,struct amdgpu_ih_ring * ih,bool enable)152 static int navi10_ih_toggle_ring_interrupts(struct amdgpu_device *adev,
153 					    struct amdgpu_ih_ring *ih,
154 					    bool enable)
155 {
156 	struct amdgpu_ih_regs *ih_regs;
157 	uint32_t tmp;
158 
159 	ih_regs = &ih->ih_regs;
160 
161 	tmp = RREG32(ih_regs->ih_rb_cntl);
162 	tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_ENABLE, (enable ? 1 : 0));
163 	tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_GPU_TS_ENABLE, 1);
164 	/* enable_intr field is only valid in ring0 */
165 	if (ih == &adev->irq.ih)
166 		tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, ENABLE_INTR, (enable ? 1 : 0));
167 
168 	if (amdgpu_sriov_vf(adev) && amdgpu_sriov_reg_indirect_ih(adev)) {
169 		if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp))
170 			return -ETIMEDOUT;
171 	} else {
172 		WREG32(ih_regs->ih_rb_cntl, tmp);
173 	}
174 
175 	if (enable) {
176 		ih->enabled = true;
177 	} else {
178 		/* set rptr, wptr to 0 */
179 		WREG32(ih_regs->ih_rb_rptr, 0);
180 		WREG32(ih_regs->ih_rb_wptr, 0);
181 		ih->enabled = false;
182 		ih->rptr = 0;
183 	}
184 
185 	return 0;
186 }
187 
188 /**
189  * navi10_ih_toggle_interrupts - Toggle all the available interrupt ring buffers
190  *
191  * @adev: amdgpu_device pointer
192  * @enable: enable or disable interrupt ring buffers
193  *
194  * Toggle all the available interrupt ring buffers (NAVI10).
195  */
navi10_ih_toggle_interrupts(struct amdgpu_device * adev,bool enable)196 static int navi10_ih_toggle_interrupts(struct amdgpu_device *adev, bool enable)
197 {
198 	struct amdgpu_ih_ring *ih[] = {&adev->irq.ih, &adev->irq.ih1, &adev->irq.ih2};
199 	int i;
200 	int r;
201 
202 	for (i = 0; i < ARRAY_SIZE(ih); i++) {
203 		if (ih[i]->ring_size) {
204 			r = navi10_ih_toggle_ring_interrupts(adev, ih[i], enable);
205 			if (r)
206 				return r;
207 		}
208 	}
209 
210 	return 0;
211 }
212 
navi10_ih_rb_cntl(struct amdgpu_ih_ring * ih,uint32_t ih_rb_cntl)213 static uint32_t navi10_ih_rb_cntl(struct amdgpu_ih_ring *ih, uint32_t ih_rb_cntl)
214 {
215 	int rb_bufsz = order_base_2(ih->ring_size / 4);
216 
217 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
218 				   MC_SPACE, ih->use_bus_addr ? 1 : 4);
219 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
220 				   WPTR_OVERFLOW_CLEAR, 1);
221 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
222 				   WPTR_OVERFLOW_ENABLE, 1);
223 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RB_SIZE, rb_bufsz);
224 	/* Ring Buffer write pointer writeback. If enabled, IH_RB_WPTR register
225 	 * value is written to memory
226 	 */
227 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
228 				   WPTR_WRITEBACK_ENABLE, 1);
229 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_SNOOP, 1);
230 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_RO, 0);
231 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_VMID, 0);
232 
233 	return ih_rb_cntl;
234 }
235 
navi10_ih_doorbell_rptr(struct amdgpu_ih_ring * ih)236 static uint32_t navi10_ih_doorbell_rptr(struct amdgpu_ih_ring *ih)
237 {
238 	u32 ih_doorbell_rtpr = 0;
239 
240 	if (ih->use_doorbell) {
241 		ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr,
242 						 IH_DOORBELL_RPTR, OFFSET,
243 						 ih->doorbell_index);
244 		ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr,
245 						 IH_DOORBELL_RPTR,
246 						 ENABLE, 1);
247 	} else {
248 		ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr,
249 						 IH_DOORBELL_RPTR,
250 						 ENABLE, 0);
251 	}
252 	return ih_doorbell_rtpr;
253 }
254 
255 /**
256  * navi10_ih_enable_ring - enable an ih ring buffer
257  *
258  * @adev: amdgpu_device pointer
259  * @ih: amdgpu_ih_ring pointer
260  *
261  * Enable an ih ring buffer (NAVI10)
262  */
navi10_ih_enable_ring(struct amdgpu_device * adev,struct amdgpu_ih_ring * ih)263 static int navi10_ih_enable_ring(struct amdgpu_device *adev,
264 				 struct amdgpu_ih_ring *ih)
265 {
266 	struct amdgpu_ih_regs *ih_regs;
267 	uint32_t tmp;
268 
269 	ih_regs = &ih->ih_regs;
270 
271 	/* Ring Buffer base. [39:8] of 40-bit address of the beginning of the ring buffer*/
272 	WREG32(ih_regs->ih_rb_base, ih->gpu_addr >> 8);
273 	WREG32(ih_regs->ih_rb_base_hi, (ih->gpu_addr >> 40) & 0xff);
274 
275 	tmp = RREG32(ih_regs->ih_rb_cntl);
276 	tmp = navi10_ih_rb_cntl(ih, tmp);
277 	if (ih == &adev->irq.ih)
278 		tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RPTR_REARM, !!adev->irq.msi_enabled);
279 	if (ih == &adev->irq.ih1)
280 		tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_FULL_DRAIN_ENABLE, 1);
281 
282 	if (amdgpu_sriov_vf(adev) && amdgpu_sriov_reg_indirect_ih(adev)) {
283 		if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp)) {
284 			DRM_ERROR("PSP program IH_RB_CNTL failed!\n");
285 			return -ETIMEDOUT;
286 		}
287 	} else {
288 		WREG32(ih_regs->ih_rb_cntl, tmp);
289 	}
290 
291 	if (ih == &adev->irq.ih) {
292 		/* set the ih ring 0 writeback address whether it's enabled or not */
293 		WREG32(ih_regs->ih_rb_wptr_addr_lo, lower_32_bits(ih->wptr_addr));
294 		WREG32(ih_regs->ih_rb_wptr_addr_hi, upper_32_bits(ih->wptr_addr) & 0xFFFF);
295 	}
296 
297 	/* set rptr, wptr to 0 */
298 	WREG32(ih_regs->ih_rb_wptr, 0);
299 	WREG32(ih_regs->ih_rb_rptr, 0);
300 
301 	WREG32(ih_regs->ih_doorbell_rptr, navi10_ih_doorbell_rptr(ih));
302 
303 	return 0;
304 }
305 
306 /**
307  * navi10_ih_irq_init - init and enable the interrupt ring
308  *
309  * @adev: amdgpu_device pointer
310  *
311  * Allocate a ring buffer for the interrupt controller,
312  * enable the RLC, disable interrupts, enable the IH
313  * ring buffer and enable it (NAVI).
314  * Called at device load and reume.
315  * Returns 0 for success, errors for failure.
316  */
navi10_ih_irq_init(struct amdgpu_device * adev)317 static int navi10_ih_irq_init(struct amdgpu_device *adev)
318 {
319 	struct amdgpu_ih_ring *ih[] = {&adev->irq.ih, &adev->irq.ih1, &adev->irq.ih2};
320 	u32 ih_chicken;
321 	int ret;
322 	int i;
323 
324 	/* disable irqs */
325 	ret = navi10_ih_toggle_interrupts(adev, false);
326 	if (ret)
327 		return ret;
328 
329 	adev->nbio.funcs->ih_control(adev);
330 
331 	if (unlikely(adev->firmware.load_type == AMDGPU_FW_LOAD_DIRECT)) {
332 		if (ih[0]->use_bus_addr) {
333 			switch (adev->ip_versions[OSSSYS_HWIP][0]) {
334 			case IP_VERSION(5, 0, 3):
335 			case IP_VERSION(5, 2, 0):
336 			case IP_VERSION(5, 2, 1):
337 				ih_chicken = RREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN_Sienna_Cichlid);
338 				ih_chicken = REG_SET_FIELD(ih_chicken,
339 						IH_CHICKEN, MC_SPACE_GPA_ENABLE, 1);
340 				WREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN_Sienna_Cichlid, ih_chicken);
341 				break;
342 			default:
343 				ih_chicken = RREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN);
344 				ih_chicken = REG_SET_FIELD(ih_chicken,
345 						IH_CHICKEN, MC_SPACE_GPA_ENABLE, 1);
346 				WREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN, ih_chicken);
347 				break;
348 			}
349 		}
350 	}
351 
352 	for (i = 0; i < ARRAY_SIZE(ih); i++) {
353 		if (ih[i]->ring_size) {
354 			ret = navi10_ih_enable_ring(adev, ih[i]);
355 			if (ret)
356 				return ret;
357 		}
358 	}
359 
360 	/* update doorbell range for ih ring 0*/
361 	adev->nbio.funcs->ih_doorbell_range(adev, ih[0]->use_doorbell,
362 					    ih[0]->doorbell_index);
363 
364 	pci_set_master(adev->pdev);
365 
366 	/* enable interrupts */
367 	ret = navi10_ih_toggle_interrupts(adev, true);
368 	if (ret)
369 		return ret;
370 	/* enable wptr force update for self int */
371 	force_update_wptr_for_self_int(adev, 0, 8, true);
372 
373 	if (adev->irq.ih_soft.ring_size)
374 		adev->irq.ih_soft.enabled = true;
375 
376 	return 0;
377 }
378 
379 /**
380  * navi10_ih_irq_disable - disable interrupts
381  *
382  * @adev: amdgpu_device pointer
383  *
384  * Disable interrupts on the hw (NAVI10).
385  */
navi10_ih_irq_disable(struct amdgpu_device * adev)386 static void navi10_ih_irq_disable(struct amdgpu_device *adev)
387 {
388 	force_update_wptr_for_self_int(adev, 0, 8, false);
389 	navi10_ih_toggle_interrupts(adev, false);
390 
391 	/* Wait and acknowledge irq */
392 	mdelay(1);
393 }
394 
395 /**
396  * navi10_ih_get_wptr - get the IH ring buffer wptr
397  *
398  * @adev: amdgpu_device pointer
399  * @ih: IH ring buffer to fetch wptr
400  *
401  * Get the IH ring buffer wptr from either the register
402  * or the writeback memory buffer (NAVI10).  Also check for
403  * ring buffer overflow and deal with it.
404  * Returns the value of the wptr.
405  */
navi10_ih_get_wptr(struct amdgpu_device * adev,struct amdgpu_ih_ring * ih)406 static u32 navi10_ih_get_wptr(struct amdgpu_device *adev,
407 			      struct amdgpu_ih_ring *ih)
408 {
409 	u32 wptr, tmp;
410 	struct amdgpu_ih_regs *ih_regs;
411 
412 	if (ih == &adev->irq.ih || ih == &adev->irq.ih_soft) {
413 		/* Only ring0 supports writeback. On other rings fall back
414 		 * to register-based code with overflow checking below.
415 		 * ih_soft ring doesn't have any backing hardware registers,
416 		 * update wptr and return.
417 		 */
418 		wptr = le32_to_cpu(*ih->wptr_cpu);
419 
420 		if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW))
421 			goto out;
422 	}
423 
424 	ih_regs = &ih->ih_regs;
425 
426 	/* Double check that the overflow wasn't already cleared. */
427 	wptr = RREG32_NO_KIQ(ih_regs->ih_rb_wptr);
428 	if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW))
429 		goto out;
430 	wptr = REG_SET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW, 0);
431 
432 	/* When a ring buffer overflow happen start parsing interrupt
433 	 * from the last not overwritten vector (wptr + 32). Hopefully
434 	 * this should allow us to catch up.
435 	 */
436 	tmp = (wptr + 32) & ih->ptr_mask;
437 	dev_warn(adev->dev, "IH ring buffer overflow "
438 		 "(0x%08X, 0x%08X, 0x%08X)\n",
439 		 wptr, ih->rptr, tmp);
440 	ih->rptr = tmp;
441 
442 	tmp = RREG32_NO_KIQ(ih_regs->ih_rb_cntl);
443 	tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 1);
444 	WREG32_NO_KIQ(ih_regs->ih_rb_cntl, tmp);
445 
446 	/* Unset the CLEAR_OVERFLOW bit immediately so new overflows
447 	 * can be detected.
448 	 */
449 	tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 0);
450 	WREG32_NO_KIQ(ih_regs->ih_rb_cntl, tmp);
451 out:
452 	return (wptr & ih->ptr_mask);
453 }
454 
455 /**
456  * navi10_ih_irq_rearm - rearm IRQ if lost
457  *
458  * @adev: amdgpu_device pointer
459  * @ih: IH ring to match
460  *
461  */
navi10_ih_irq_rearm(struct amdgpu_device * adev,struct amdgpu_ih_ring * ih)462 static void navi10_ih_irq_rearm(struct amdgpu_device *adev,
463 			       struct amdgpu_ih_ring *ih)
464 {
465 	uint32_t v = 0;
466 	uint32_t i = 0;
467 	struct amdgpu_ih_regs *ih_regs;
468 
469 	ih_regs = &ih->ih_regs;
470 
471 	/* Rearm IRQ / re-write doorbell if doorbell write is lost */
472 	for (i = 0; i < MAX_REARM_RETRY; i++) {
473 		v = RREG32_NO_KIQ(ih_regs->ih_rb_rptr);
474 		if ((v < ih->ring_size) && (v != ih->rptr))
475 			WDOORBELL32(ih->doorbell_index, ih->rptr);
476 		else
477 			break;
478 	}
479 }
480 
481 /**
482  * navi10_ih_set_rptr - set the IH ring buffer rptr
483  *
484  * @adev: amdgpu_device pointer
485  *
486  * @ih: IH ring buffer to set rptr
487  * Set the IH ring buffer rptr.
488  */
navi10_ih_set_rptr(struct amdgpu_device * adev,struct amdgpu_ih_ring * ih)489 static void navi10_ih_set_rptr(struct amdgpu_device *adev,
490 			       struct amdgpu_ih_ring *ih)
491 {
492 	struct amdgpu_ih_regs *ih_regs;
493 
494 	if (ih == &adev->irq.ih_soft)
495 		return;
496 
497 	if (ih->use_doorbell) {
498 		/* XXX check if swapping is necessary on BE */
499 		*ih->rptr_cpu = ih->rptr;
500 		WDOORBELL32(ih->doorbell_index, ih->rptr);
501 
502 		if (amdgpu_sriov_vf(adev))
503 			navi10_ih_irq_rearm(adev, ih);
504 	} else {
505 		ih_regs = &ih->ih_regs;
506 		WREG32(ih_regs->ih_rb_rptr, ih->rptr);
507 	}
508 }
509 
510 /**
511  * navi10_ih_self_irq - dispatch work for ring 1 and 2
512  *
513  * @adev: amdgpu_device pointer
514  * @source: irq source
515  * @entry: IV with WPTR update
516  *
517  * Update the WPTR from the IV and schedule work to handle the entries.
518  */
navi10_ih_self_irq(struct amdgpu_device * adev,struct amdgpu_irq_src * source,struct amdgpu_iv_entry * entry)519 static int navi10_ih_self_irq(struct amdgpu_device *adev,
520 			      struct amdgpu_irq_src *source,
521 			      struct amdgpu_iv_entry *entry)
522 {
523 	switch (entry->ring_id) {
524 	case 1:
525 		schedule_work(&adev->irq.ih1_work);
526 		break;
527 	case 2:
528 		schedule_work(&adev->irq.ih2_work);
529 		break;
530 	default: break;
531 	}
532 	return 0;
533 }
534 
535 static const struct amdgpu_irq_src_funcs navi10_ih_self_irq_funcs = {
536 	.process = navi10_ih_self_irq,
537 };
538 
navi10_ih_set_self_irq_funcs(struct amdgpu_device * adev)539 static void navi10_ih_set_self_irq_funcs(struct amdgpu_device *adev)
540 {
541 	adev->irq.self_irq.num_types = 0;
542 	adev->irq.self_irq.funcs = &navi10_ih_self_irq_funcs;
543 }
544 
navi10_ih_early_init(void * handle)545 static int navi10_ih_early_init(void *handle)
546 {
547 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
548 
549 	navi10_ih_set_interrupt_funcs(adev);
550 	navi10_ih_set_self_irq_funcs(adev);
551 	return 0;
552 }
553 
navi10_ih_sw_init(void * handle)554 static int navi10_ih_sw_init(void *handle)
555 {
556 	int r;
557 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
558 	bool use_bus_addr;
559 
560 	r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_IH, 0,
561 				&adev->irq.self_irq);
562 
563 	if (r)
564 		return r;
565 
566 	/* use gpu virtual address for ih ring
567 	 * until ih_checken is programmed to allow
568 	 * use bus address for ih ring by psp bl */
569 	if ((adev->flags & AMD_IS_APU) ||
570 	    (adev->firmware.load_type == AMDGPU_FW_LOAD_PSP))
571 		use_bus_addr = false;
572 	else
573 		use_bus_addr = true;
574 	r = amdgpu_ih_ring_init(adev, &adev->irq.ih, IH_RING_SIZE, use_bus_addr);
575 	if (r)
576 		return r;
577 
578 	adev->irq.ih.use_doorbell = true;
579 	adev->irq.ih.doorbell_index = adev->doorbell_index.ih << 1;
580 
581 	adev->irq.ih1.ring_size = 0;
582 	adev->irq.ih2.ring_size = 0;
583 
584 	/* initialize ih control registers offset */
585 	navi10_ih_init_register_offset(adev);
586 
587 	r = amdgpu_ih_ring_init(adev, &adev->irq.ih_soft, IH_SW_RING_SIZE, true);
588 	if (r)
589 		return r;
590 
591 	r = amdgpu_irq_init(adev);
592 
593 	return r;
594 }
595 
navi10_ih_sw_fini(void * handle)596 static int navi10_ih_sw_fini(void *handle)
597 {
598 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
599 
600 	amdgpu_irq_fini_sw(adev);
601 
602 	return 0;
603 }
604 
navi10_ih_hw_init(void * handle)605 static int navi10_ih_hw_init(void *handle)
606 {
607 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
608 
609 	return navi10_ih_irq_init(adev);
610 }
611 
navi10_ih_hw_fini(void * handle)612 static int navi10_ih_hw_fini(void *handle)
613 {
614 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
615 
616 	navi10_ih_irq_disable(adev);
617 
618 	return 0;
619 }
620 
navi10_ih_suspend(void * handle)621 static int navi10_ih_suspend(void *handle)
622 {
623 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
624 
625 	return navi10_ih_hw_fini(adev);
626 }
627 
navi10_ih_resume(void * handle)628 static int navi10_ih_resume(void *handle)
629 {
630 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
631 
632 	return navi10_ih_hw_init(adev);
633 }
634 
navi10_ih_is_idle(void * handle)635 static bool navi10_ih_is_idle(void *handle)
636 {
637 	/* todo */
638 	return true;
639 }
640 
navi10_ih_wait_for_idle(void * handle)641 static int navi10_ih_wait_for_idle(void *handle)
642 {
643 	/* todo */
644 	return -ETIMEDOUT;
645 }
646 
navi10_ih_soft_reset(void * handle)647 static int navi10_ih_soft_reset(void *handle)
648 {
649 	/* todo */
650 	return 0;
651 }
652 
navi10_ih_update_clockgating_state(struct amdgpu_device * adev,bool enable)653 static void navi10_ih_update_clockgating_state(struct amdgpu_device *adev,
654 					       bool enable)
655 {
656 	uint32_t data, def, field_val;
657 
658 	if (adev->cg_flags & AMD_CG_SUPPORT_IH_CG) {
659 		def = data = RREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL);
660 		field_val = enable ? 0 : 1;
661 		data = REG_SET_FIELD(data, IH_CLK_CTRL,
662 				     DBUS_MUX_CLK_SOFT_OVERRIDE, field_val);
663 		data = REG_SET_FIELD(data, IH_CLK_CTRL,
664 				     OSSSYS_SHARE_CLK_SOFT_OVERRIDE, field_val);
665 		data = REG_SET_FIELD(data, IH_CLK_CTRL,
666 				     LIMIT_SMN_CLK_SOFT_OVERRIDE, field_val);
667 		data = REG_SET_FIELD(data, IH_CLK_CTRL,
668 				     DYN_CLK_SOFT_OVERRIDE, field_val);
669 		data = REG_SET_FIELD(data, IH_CLK_CTRL,
670 				     REG_CLK_SOFT_OVERRIDE, field_val);
671 		if (def != data)
672 			WREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL, data);
673 	}
674 
675 	return;
676 }
677 
navi10_ih_set_clockgating_state(void * handle,enum amd_clockgating_state state)678 static int navi10_ih_set_clockgating_state(void *handle,
679 					   enum amd_clockgating_state state)
680 {
681 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
682 
683 	navi10_ih_update_clockgating_state(adev,
684 				state == AMD_CG_STATE_GATE);
685 	return 0;
686 }
687 
navi10_ih_set_powergating_state(void * handle,enum amd_powergating_state state)688 static int navi10_ih_set_powergating_state(void *handle,
689 					   enum amd_powergating_state state)
690 {
691 	return 0;
692 }
693 
navi10_ih_get_clockgating_state(void * handle,u64 * flags)694 static void navi10_ih_get_clockgating_state(void *handle, u64 *flags)
695 {
696 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
697 
698 	if (!RREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL))
699 		*flags |= AMD_CG_SUPPORT_IH_CG;
700 
701 	return;
702 }
703 
704 static const struct amd_ip_funcs navi10_ih_ip_funcs = {
705 	.name = "navi10_ih",
706 	.early_init = navi10_ih_early_init,
707 	.late_init = NULL,
708 	.sw_init = navi10_ih_sw_init,
709 	.sw_fini = navi10_ih_sw_fini,
710 	.hw_init = navi10_ih_hw_init,
711 	.hw_fini = navi10_ih_hw_fini,
712 	.suspend = navi10_ih_suspend,
713 	.resume = navi10_ih_resume,
714 	.is_idle = navi10_ih_is_idle,
715 	.wait_for_idle = navi10_ih_wait_for_idle,
716 	.soft_reset = navi10_ih_soft_reset,
717 	.set_clockgating_state = navi10_ih_set_clockgating_state,
718 	.set_powergating_state = navi10_ih_set_powergating_state,
719 	.get_clockgating_state = navi10_ih_get_clockgating_state,
720 };
721 
722 static const struct amdgpu_ih_funcs navi10_ih_funcs = {
723 	.get_wptr = navi10_ih_get_wptr,
724 	.decode_iv = amdgpu_ih_decode_iv_helper,
725 	.decode_iv_ts = amdgpu_ih_decode_iv_ts_helper,
726 	.set_rptr = navi10_ih_set_rptr
727 };
728 
navi10_ih_set_interrupt_funcs(struct amdgpu_device * adev)729 static void navi10_ih_set_interrupt_funcs(struct amdgpu_device *adev)
730 {
731 	if (adev->irq.ih_funcs == NULL)
732 		adev->irq.ih_funcs = &navi10_ih_funcs;
733 }
734 
735 const struct amdgpu_ip_block_version navi10_ih_ip_block =
736 {
737 	.type = AMD_IP_BLOCK_TYPE_IH,
738 	.major = 5,
739 	.minor = 0,
740 	.rev = 0,
741 	.funcs = &navi10_ih_ip_funcs,
742 };
743