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drm/amdgpu: switch to use new SOC15 reg read/write macros for soc15 ih
[mirror_ubuntu-jammy-kernel.git] / drivers / gpu / drm / amd / amdgpu / vega10_ih.c
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 #include <drm/drmP.h>
24 #include "amdgpu.h"
25 #include "amdgpu_ih.h"
26 #include "soc15.h"
27
28
29 #include "vega10/soc15ip.h"
30 #include "vega10/OSSSYS/osssys_4_0_offset.h"
31 #include "vega10/OSSSYS/osssys_4_0_sh_mask.h"
32
33 #include "soc15_common.h"
34 #include "vega10_ih.h"
35
36
37
38 static void vega10_ih_set_interrupt_funcs(struct amdgpu_device *adev);
39
40 /**
41 * vega10_ih_enable_interrupts - Enable the interrupt ring buffer
42 *
43 * @adev: amdgpu_device pointer
44 *
45 * Enable the interrupt ring buffer (VEGA10).
46 */
47 static void vega10_ih_enable_interrupts(struct amdgpu_device *adev)
48 {
49 u32 ih_rb_cntl = RREG32_SOC15(OSSSYS, 0, mmIH_RB_CNTL);
50
51 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RB_ENABLE, 1);
52 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, ENABLE_INTR, 1);
53 WREG32_SOC15(OSSSYS, 0, mmIH_RB_CNTL, ih_rb_cntl);
54 adev->irq.ih.enabled = true;
55 }
56
57 /**
58 * vega10_ih_disable_interrupts - Disable the interrupt ring buffer
59 *
60 * @adev: amdgpu_device pointer
61 *
62 * Disable the interrupt ring buffer (VEGA10).
63 */
64 static void vega10_ih_disable_interrupts(struct amdgpu_device *adev)
65 {
66 u32 ih_rb_cntl = RREG32_SOC15(OSSSYS, 0, mmIH_RB_CNTL);
67
68 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RB_ENABLE, 0);
69 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, ENABLE_INTR, 0);
70 WREG32_SOC15(OSSSYS, 0, mmIH_RB_CNTL, ih_rb_cntl);
71 /* set rptr, wptr to 0 */
72 WREG32_SOC15(OSSSYS, 0, mmIH_RB_RPTR, 0);
73 WREG32_SOC15(OSSSYS, 0, mmIH_RB_WPTR, 0);
74 adev->irq.ih.enabled = false;
75 adev->irq.ih.rptr = 0;
76 }
77
78 /**
79 * vega10_ih_irq_init - init and enable the interrupt ring
80 *
81 * @adev: amdgpu_device pointer
82 *
83 * Allocate a ring buffer for the interrupt controller,
84 * enable the RLC, disable interrupts, enable the IH
85 * ring buffer and enable it (VI).
86 * Called at device load and reume.
87 * Returns 0 for success, errors for failure.
88 */
89 static int vega10_ih_irq_init(struct amdgpu_device *adev)
90 {
91 int ret = 0;
92 int rb_bufsz;
93 u32 ih_rb_cntl, ih_doorbell_rtpr;
94 u32 tmp;
95 u64 wptr_off;
96
97 /* disable irqs */
98 vega10_ih_disable_interrupts(adev);
99
100 if (adev->flags & AMD_IS_APU)
101 nbio_v7_0_ih_control(adev);
102 else
103 nbio_v6_1_ih_control(adev);
104
105 ih_rb_cntl = RREG32_SOC15(OSSSYS, 0, mmIH_RB_CNTL);
106 /* Ring Buffer base. [39:8] of 40-bit address of the beginning of the ring buffer*/
107 if (adev->irq.ih.use_bus_addr) {
108 WREG32_SOC15(OSSSYS, 0, mmIH_RB_BASE, adev->irq.ih.rb_dma_addr >> 8);
109 WREG32_SOC15(OSSSYS, 0, mmIH_RB_BASE_HI, ((u64)adev->irq.ih.rb_dma_addr >> 40) & 0xff);
110 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_SPACE, 1);
111 } else {
112 WREG32_SOC15(OSSSYS, 0, mmIH_RB_BASE, adev->irq.ih.gpu_addr >> 8);
113 WREG32_SOC15(OSSSYS, 0, mmIH_RB_BASE_HI, (adev->irq.ih.gpu_addr >> 40) & 0xff);
114 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_SPACE, 4);
115 }
116 rb_bufsz = order_base_2(adev->irq.ih.ring_size / 4);
117 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 1);
118 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, WPTR_OVERFLOW_ENABLE, 1);
119 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RB_SIZE, rb_bufsz);
120 /* Ring Buffer write pointer writeback. If enabled, IH_RB_WPTR register value is written to memory */
121 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, WPTR_WRITEBACK_ENABLE, 1);
122 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_SNOOP, 1);
123 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_RO, 0);
124 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_VMID, 0);
125
126 if (adev->irq.msi_enabled)
127 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RPTR_REARM, 1);
128
129 WREG32_SOC15(OSSSYS, 0, mmIH_RB_CNTL, ih_rb_cntl);
130
131 /* set the writeback address whether it's enabled or not */
132 if (adev->irq.ih.use_bus_addr)
133 wptr_off = adev->irq.ih.rb_dma_addr + (adev->irq.ih.wptr_offs * 4);
134 else
135 wptr_off = adev->wb.gpu_addr + (adev->irq.ih.wptr_offs * 4);
136 WREG32_SOC15(OSSSYS, 0, mmIH_RB_WPTR_ADDR_LO, lower_32_bits(wptr_off));
137 WREG32_SOC15(OSSSYS, 0, mmIH_RB_WPTR_ADDR_HI, upper_32_bits(wptr_off) & 0xFF);
138
139 /* set rptr, wptr to 0 */
140 WREG32_SOC15(OSSSYS, 0, mmIH_RB_RPTR, 0);
141 WREG32_SOC15(OSSSYS, 0, mmIH_RB_WPTR, 0);
142
143 ih_doorbell_rtpr = RREG32_SOC15(OSSSYS, 0, mmIH_DOORBELL_RPTR);
144 if (adev->irq.ih.use_doorbell) {
145 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr, IH_DOORBELL_RPTR,
146 OFFSET, adev->irq.ih.doorbell_index);
147 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr, IH_DOORBELL_RPTR,
148 ENABLE, 1);
149 } else {
150 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr, IH_DOORBELL_RPTR,
151 ENABLE, 0);
152 }
153 WREG32_SOC15(OSSSYS, 0, mmIH_DOORBELL_RPTR, ih_doorbell_rtpr);
154 if (adev->flags & AMD_IS_APU)
155 nbio_v7_0_ih_doorbell_range(adev, adev->irq.ih.use_doorbell, adev->irq.ih.doorbell_index);
156 else
157 nbio_v6_1_ih_doorbell_range(adev, adev->irq.ih.use_doorbell, adev->irq.ih.doorbell_index);
158
159 tmp = RREG32_SOC15(OSSSYS, 0, mmIH_STORM_CLIENT_LIST_CNTL);
160 tmp = REG_SET_FIELD(tmp, IH_STORM_CLIENT_LIST_CNTL,
161 CLIENT18_IS_STORM_CLIENT, 1);
162 WREG32_SOC15(OSSSYS, 0, mmIH_STORM_CLIENT_LIST_CNTL, tmp);
163
164 tmp = RREG32_SOC15(OSSSYS, 0, mmIH_INT_FLOOD_CNTL);
165 tmp = REG_SET_FIELD(tmp, IH_INT_FLOOD_CNTL, FLOOD_CNTL_ENABLE, 1);
166 WREG32_SOC15(OSSSYS, 0, mmIH_INT_FLOOD_CNTL, tmp);
167
168 pci_set_master(adev->pdev);
169
170 /* enable interrupts */
171 vega10_ih_enable_interrupts(adev);
172
173 return ret;
174 }
175
176 /**
177 * vega10_ih_irq_disable - disable interrupts
178 *
179 * @adev: amdgpu_device pointer
180 *
181 * Disable interrupts on the hw (VEGA10).
182 */
183 static void vega10_ih_irq_disable(struct amdgpu_device *adev)
184 {
185 vega10_ih_disable_interrupts(adev);
186
187 /* Wait and acknowledge irq */
188 mdelay(1);
189 }
190
191 /**
192 * vega10_ih_get_wptr - get the IH ring buffer wptr
193 *
194 * @adev: amdgpu_device pointer
195 *
196 * Get the IH ring buffer wptr from either the register
197 * or the writeback memory buffer (VEGA10). Also check for
198 * ring buffer overflow and deal with it.
199 * Returns the value of the wptr.
200 */
201 static u32 vega10_ih_get_wptr(struct amdgpu_device *adev)
202 {
203 u32 wptr, tmp;
204
205 if (adev->irq.ih.use_bus_addr)
206 wptr = le32_to_cpu(adev->irq.ih.ring[adev->irq.ih.wptr_offs]);
207 else
208 wptr = le32_to_cpu(adev->wb.wb[adev->irq.ih.wptr_offs]);
209
210 if (REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW)) {
211 wptr = REG_SET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW, 0);
212
213 /* When a ring buffer overflow happen start parsing interrupt
214 * from the last not overwritten vector (wptr + 32). Hopefully
215 * this should allow us to catchup.
216 */
217 tmp = (wptr + 32) & adev->irq.ih.ptr_mask;
218 dev_warn(adev->dev, "IH ring buffer overflow (0x%08X, 0x%08X, 0x%08X)\n",
219 wptr, adev->irq.ih.rptr, tmp);
220 adev->irq.ih.rptr = tmp;
221
222 tmp = RREG32_NO_KIQ(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL));
223 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 1);
224 WREG32_NO_KIQ(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL), tmp);
225 }
226 return (wptr & adev->irq.ih.ptr_mask);
227 }
228
229 /**
230 * vega10_ih_prescreen_iv - prescreen an interrupt vector
231 *
232 * @adev: amdgpu_device pointer
233 *
234 * Returns true if the interrupt vector should be further processed.
235 */
236 static bool vega10_ih_prescreen_iv(struct amdgpu_device *adev)
237 {
238 u32 ring_index = adev->irq.ih.rptr >> 2;
239 u32 dw0, dw3, dw4, dw5;
240 u16 pasid;
241 u64 addr, key;
242 struct amdgpu_vm *vm;
243 int r;
244
245 dw0 = le32_to_cpu(adev->irq.ih.ring[ring_index + 0]);
246 dw3 = le32_to_cpu(adev->irq.ih.ring[ring_index + 3]);
247 dw4 = le32_to_cpu(adev->irq.ih.ring[ring_index + 4]);
248 dw5 = le32_to_cpu(adev->irq.ih.ring[ring_index + 5]);
249
250 /* Filter retry page faults, let only the first one pass. If
251 * there are too many outstanding faults, ignore them until
252 * some faults get cleared.
253 */
254 switch (dw0 & 0xff) {
255 case AMDGPU_IH_CLIENTID_VMC:
256 case AMDGPU_IH_CLIENTID_UTCL2:
257 break;
258 default:
259 /* Not a VM fault */
260 return true;
261 }
262
263 pasid = dw3 & 0xffff;
264 /* No PASID, can't identify faulting process */
265 if (!pasid)
266 return true;
267
268 /* Not a retry fault, check fault credit */
269 if (!(dw5 & 0x80)) {
270 if (!amdgpu_vm_pasid_fault_credit(adev, pasid))
271 goto ignore_iv;
272 return true;
273 }
274
275 addr = ((u64)(dw5 & 0xf) << 44) | ((u64)dw4 << 12);
276 key = AMDGPU_VM_FAULT(pasid, addr);
277 r = amdgpu_ih_add_fault(adev, key);
278
279 /* Hash table is full or the fault is already being processed,
280 * ignore further page faults
281 */
282 if (r != 0)
283 goto ignore_iv;
284
285 /* Track retry faults in per-VM fault FIFO. */
286 spin_lock(&adev->vm_manager.pasid_lock);
287 vm = idr_find(&adev->vm_manager.pasid_idr, pasid);
288 spin_unlock(&adev->vm_manager.pasid_lock);
289 if (WARN_ON_ONCE(!vm)) {
290 /* VM not found, process it normally */
291 amdgpu_ih_clear_fault(adev, key);
292 return true;
293 }
294 /* No locking required with single writer and single reader */
295 r = kfifo_put(&vm->faults, key);
296 if (!r) {
297 /* FIFO is full. Ignore it until there is space */
298 amdgpu_ih_clear_fault(adev, key);
299 goto ignore_iv;
300 }
301
302 /* It's the first fault for this address, process it normally */
303 return true;
304
305 ignore_iv:
306 adev->irq.ih.rptr += 32;
307 return false;
308 }
309
310 /**
311 * vega10_ih_decode_iv - decode an interrupt vector
312 *
313 * @adev: amdgpu_device pointer
314 *
315 * Decodes the interrupt vector at the current rptr
316 * position and also advance the position.
317 */
318 static void vega10_ih_decode_iv(struct amdgpu_device *adev,
319 struct amdgpu_iv_entry *entry)
320 {
321 /* wptr/rptr are in bytes! */
322 u32 ring_index = adev->irq.ih.rptr >> 2;
323 uint32_t dw[8];
324
325 dw[0] = le32_to_cpu(adev->irq.ih.ring[ring_index + 0]);
326 dw[1] = le32_to_cpu(adev->irq.ih.ring[ring_index + 1]);
327 dw[2] = le32_to_cpu(adev->irq.ih.ring[ring_index + 2]);
328 dw[3] = le32_to_cpu(adev->irq.ih.ring[ring_index + 3]);
329 dw[4] = le32_to_cpu(adev->irq.ih.ring[ring_index + 4]);
330 dw[5] = le32_to_cpu(adev->irq.ih.ring[ring_index + 5]);
331 dw[6] = le32_to_cpu(adev->irq.ih.ring[ring_index + 6]);
332 dw[7] = le32_to_cpu(adev->irq.ih.ring[ring_index + 7]);
333
334 entry->client_id = dw[0] & 0xff;
335 entry->src_id = (dw[0] >> 8) & 0xff;
336 entry->ring_id = (dw[0] >> 16) & 0xff;
337 entry->vm_id = (dw[0] >> 24) & 0xf;
338 entry->vm_id_src = (dw[0] >> 31);
339 entry->timestamp = dw[1] | ((u64)(dw[2] & 0xffff) << 32);
340 entry->timestamp_src = dw[2] >> 31;
341 entry->pas_id = dw[3] & 0xffff;
342 entry->pasid_src = dw[3] >> 31;
343 entry->src_data[0] = dw[4];
344 entry->src_data[1] = dw[5];
345 entry->src_data[2] = dw[6];
346 entry->src_data[3] = dw[7];
347
348
349 /* wptr/rptr are in bytes! */
350 adev->irq.ih.rptr += 32;
351 }
352
353 /**
354 * vega10_ih_set_rptr - set the IH ring buffer rptr
355 *
356 * @adev: amdgpu_device pointer
357 *
358 * Set the IH ring buffer rptr.
359 */
360 static void vega10_ih_set_rptr(struct amdgpu_device *adev)
361 {
362 if (adev->irq.ih.use_doorbell) {
363 /* XXX check if swapping is necessary on BE */
364 if (adev->irq.ih.use_bus_addr)
365 adev->irq.ih.ring[adev->irq.ih.rptr_offs] = adev->irq.ih.rptr;
366 else
367 adev->wb.wb[adev->irq.ih.rptr_offs] = adev->irq.ih.rptr;
368 WDOORBELL32(adev->irq.ih.doorbell_index, adev->irq.ih.rptr);
369 } else {
370 WREG32_SOC15(OSSSYS, 0, mmIH_RB_RPTR, adev->irq.ih.rptr);
371 }
372 }
373
374 static int vega10_ih_early_init(void *handle)
375 {
376 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
377
378 vega10_ih_set_interrupt_funcs(adev);
379 return 0;
380 }
381
382 static int vega10_ih_sw_init(void *handle)
383 {
384 int r;
385 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
386
387 r = amdgpu_ih_ring_init(adev, 256 * 1024, true);
388 if (r)
389 return r;
390
391 adev->irq.ih.use_doorbell = true;
392 adev->irq.ih.doorbell_index = AMDGPU_DOORBELL64_IH << 1;
393
394 adev->irq.ih.faults = kmalloc(sizeof(*adev->irq.ih.faults), GFP_KERNEL);
395 if (!adev->irq.ih.faults)
396 return -ENOMEM;
397 INIT_CHASH_TABLE(adev->irq.ih.faults->hash,
398 AMDGPU_PAGEFAULT_HASH_BITS, 8, 0);
399 spin_lock_init(&adev->irq.ih.faults->lock);
400 adev->irq.ih.faults->count = 0;
401
402 r = amdgpu_irq_init(adev);
403
404 return r;
405 }
406
407 static int vega10_ih_sw_fini(void *handle)
408 {
409 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
410
411 amdgpu_irq_fini(adev);
412 amdgpu_ih_ring_fini(adev);
413
414 kfree(adev->irq.ih.faults);
415 adev->irq.ih.faults = NULL;
416
417 return 0;
418 }
419
420 static int vega10_ih_hw_init(void *handle)
421 {
422 int r;
423 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
424
425 r = vega10_ih_irq_init(adev);
426 if (r)
427 return r;
428
429 return 0;
430 }
431
432 static int vega10_ih_hw_fini(void *handle)
433 {
434 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
435
436 vega10_ih_irq_disable(adev);
437
438 return 0;
439 }
440
441 static int vega10_ih_suspend(void *handle)
442 {
443 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
444
445 return vega10_ih_hw_fini(adev);
446 }
447
448 static int vega10_ih_resume(void *handle)
449 {
450 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
451
452 return vega10_ih_hw_init(adev);
453 }
454
455 static bool vega10_ih_is_idle(void *handle)
456 {
457 /* todo */
458 return true;
459 }
460
461 static int vega10_ih_wait_for_idle(void *handle)
462 {
463 /* todo */
464 return -ETIMEDOUT;
465 }
466
467 static int vega10_ih_soft_reset(void *handle)
468 {
469 /* todo */
470
471 return 0;
472 }
473
474 static int vega10_ih_set_clockgating_state(void *handle,
475 enum amd_clockgating_state state)
476 {
477 return 0;
478 }
479
480 static int vega10_ih_set_powergating_state(void *handle,
481 enum amd_powergating_state state)
482 {
483 return 0;
484 }
485
486 const struct amd_ip_funcs vega10_ih_ip_funcs = {
487 .name = "vega10_ih",
488 .early_init = vega10_ih_early_init,
489 .late_init = NULL,
490 .sw_init = vega10_ih_sw_init,
491 .sw_fini = vega10_ih_sw_fini,
492 .hw_init = vega10_ih_hw_init,
493 .hw_fini = vega10_ih_hw_fini,
494 .suspend = vega10_ih_suspend,
495 .resume = vega10_ih_resume,
496 .is_idle = vega10_ih_is_idle,
497 .wait_for_idle = vega10_ih_wait_for_idle,
498 .soft_reset = vega10_ih_soft_reset,
499 .set_clockgating_state = vega10_ih_set_clockgating_state,
500 .set_powergating_state = vega10_ih_set_powergating_state,
501 };
502
503 static const struct amdgpu_ih_funcs vega10_ih_funcs = {
504 .get_wptr = vega10_ih_get_wptr,
505 .prescreen_iv = vega10_ih_prescreen_iv,
506 .decode_iv = vega10_ih_decode_iv,
507 .set_rptr = vega10_ih_set_rptr
508 };
509
510 static void vega10_ih_set_interrupt_funcs(struct amdgpu_device *adev)
511 {
512 if (adev->irq.ih_funcs == NULL)
513 adev->irq.ih_funcs = &vega10_ih_funcs;
514 }
515
516 const struct amdgpu_ip_block_version vega10_ih_ip_block =
517 {
518 .type = AMD_IP_BLOCK_TYPE_IH,
519 .major = 4,
520 .minor = 0,
521 .rev = 0,
522 .funcs = &vega10_ih_ip_funcs,
523 };