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 (amdgpu_ip_version(adev, 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 (amdgpu_ip_version(adev, 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
navi10_ih_set_clockgating_state(void * handle,enum amd_clockgating_state state)676 static int navi10_ih_set_clockgating_state(void *handle,
677 enum amd_clockgating_state state)
678 {
679 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
680
681 navi10_ih_update_clockgating_state(adev,
682 state == AMD_CG_STATE_GATE);
683 return 0;
684 }
685
navi10_ih_set_powergating_state(void * handle,enum amd_powergating_state state)686 static int navi10_ih_set_powergating_state(void *handle,
687 enum amd_powergating_state state)
688 {
689 return 0;
690 }
691
navi10_ih_get_clockgating_state(void * handle,u64 * flags)692 static void navi10_ih_get_clockgating_state(void *handle, u64 *flags)
693 {
694 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
695
696 if (!RREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL))
697 *flags |= AMD_CG_SUPPORT_IH_CG;
698 }
699
700 static const struct amd_ip_funcs navi10_ih_ip_funcs = {
701 .name = "navi10_ih",
702 .early_init = navi10_ih_early_init,
703 .late_init = NULL,
704 .sw_init = navi10_ih_sw_init,
705 .sw_fini = navi10_ih_sw_fini,
706 .hw_init = navi10_ih_hw_init,
707 .hw_fini = navi10_ih_hw_fini,
708 .suspend = navi10_ih_suspend,
709 .resume = navi10_ih_resume,
710 .is_idle = navi10_ih_is_idle,
711 .wait_for_idle = navi10_ih_wait_for_idle,
712 .soft_reset = navi10_ih_soft_reset,
713 .set_clockgating_state = navi10_ih_set_clockgating_state,
714 .set_powergating_state = navi10_ih_set_powergating_state,
715 .get_clockgating_state = navi10_ih_get_clockgating_state,
716 .dump_ip_state = NULL,
717 .print_ip_state = NULL,
718 };
719
720 static const struct amdgpu_ih_funcs navi10_ih_funcs = {
721 .get_wptr = navi10_ih_get_wptr,
722 .decode_iv = amdgpu_ih_decode_iv_helper,
723 .decode_iv_ts = amdgpu_ih_decode_iv_ts_helper,
724 .set_rptr = navi10_ih_set_rptr
725 };
726
navi10_ih_set_interrupt_funcs(struct amdgpu_device * adev)727 static void navi10_ih_set_interrupt_funcs(struct amdgpu_device *adev)
728 {
729 if (adev->irq.ih_funcs == NULL)
730 adev->irq.ih_funcs = &navi10_ih_funcs;
731 }
732
733 const struct amdgpu_ip_block_version navi10_ih_ip_block = {
734 .type = AMD_IP_BLOCK_TYPE_IH,
735 .major = 5,
736 .minor = 0,
737 .rev = 0,
738 .funcs = &navi10_ih_ip_funcs,
739 };
740