2 * Copyright 2016 Advanced Micro Devices, Inc.
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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.
24 #include <linux/pci.h>
27 #include "amdgpu_ih.h"
30 #include "oss/osssys_4_0_offset.h"
31 #include "oss/osssys_4_0_sh_mask.h"
33 #include "soc15_common.h"
34 #include "vega10_ih.h"
36 #define MAX_REARM_RETRY 10
38 static void vega10_ih_set_interrupt_funcs(struct amdgpu_device *adev);
41 * vega10_ih_init_register_offset - Initialize register offset for ih rings
43 * @adev: amdgpu_device pointer
45 * Initialize register offset ih rings (VEGA10).
47 static void vega10_ih_init_register_offset(struct amdgpu_device *adev)
49 struct amdgpu_ih_regs *ih_regs;
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;
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;
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;
88 * vega10_ih_toggle_ring_interrupts - toggle the interrupt ring buffer
90 * @adev: amdgpu_device pointer
91 * @ih: amdgpu_ih_ring pointet
92 * @enable: true - enable the interrupts, false - disable the interrupts
94 * Toggle the interrupt ring buffer (VEGA10)
96 static int vega10_ih_toggle_ring_interrupts(struct amdgpu_device *adev,
97 struct amdgpu_ih_ring *ih,
100 struct amdgpu_ih_regs *ih_regs;
103 ih_regs = &ih->ih_regs;
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");
117 WREG32(ih_regs->ih_rb_cntl, tmp);
123 /* set rptr, wptr to 0 */
124 WREG32(ih_regs->ih_rb_rptr, 0);
125 WREG32(ih_regs->ih_rb_wptr, 0);
134 * vega10_ih_toggle_interrupts - Toggle all the available interrupt ring buffers
136 * @adev: amdgpu_device pointer
137 * @enable: enable or disable interrupt ring buffers
139 * Toggle all the available interrupt ring buffers (VEGA10).
141 static int vega10_ih_toggle_interrupts(struct amdgpu_device *adev, bool enable)
143 struct amdgpu_ih_ring *ih[] = {&adev->irq.ih, &adev->irq.ih1, &adev->irq.ih2};
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);
158 static uint32_t vega10_ih_rb_cntl(struct amdgpu_ih_ring *ih, uint32_t ih_rb_cntl)
160 int rb_bufsz = order_base_2(ih->ring_size / 4);
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
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);
181 static uint32_t vega10_ih_doorbell_rptr(struct amdgpu_ih_ring *ih)
183 u32 ih_doorbell_rtpr = 0;
185 if (ih->use_doorbell) {
186 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr,
187 IH_DOORBELL_RPTR, OFFSET,
189 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr,
193 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr,
197 return ih_doorbell_rtpr;
201 * vega10_ih_enable_ring - enable an ih ring buffer
203 * @adev: amdgpu_device pointer
204 * @ih: amdgpu_ih_ring pointer
206 * Enable an ih ring buffer (VEGA10)
208 static int vega10_ih_enable_ring(struct amdgpu_device *adev,
209 struct amdgpu_ih_ring *ih)
211 struct amdgpu_ih_regs *ih_regs;
214 ih_regs = &ih->ih_regs;
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);
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");
232 WREG32(ih_regs->ih_rb_cntl, tmp);
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);
241 /* set rptr, wptr to 0 */
242 WREG32(ih_regs->ih_rb_wptr, 0);
243 WREG32(ih_regs->ih_rb_rptr, 0);
245 WREG32(ih_regs->ih_doorbell_rptr, vega10_ih_doorbell_rptr(ih));
251 * vega10_ih_irq_init - init and enable the interrupt ring
253 * @adev: amdgpu_device pointer
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.
261 static int vega10_ih_irq_init(struct amdgpu_device *adev)
263 struct amdgpu_ih_ring *ih[] = {&adev->irq.ih, &adev->irq.ih1, &adev->irq.ih2};
269 ret = vega10_ih_toggle_interrupts(adev, false);
273 adev->nbio.funcs->ih_control(adev);
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);
281 WREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN, ih_chicken);
284 for (i = 0; i < ARRAY_SIZE(ih); i++) {
285 if (ih[i]->ring_size) {
286 ret = vega10_ih_enable_ring(adev, ih[i]);
292 pci_set_master(adev->pdev);
294 /* enable interrupts */
295 ret = vega10_ih_toggle_interrupts(adev, true);
299 if (adev->irq.ih_soft.ring_size)
300 adev->irq.ih_soft.enabled = true;
306 * vega10_ih_irq_disable - disable interrupts
308 * @adev: amdgpu_device pointer
310 * Disable interrupts on the hw (VEGA10).
312 static void vega10_ih_irq_disable(struct amdgpu_device *adev)
314 vega10_ih_toggle_interrupts(adev, false);
316 /* Wait and acknowledge irq */
321 * vega10_ih_get_wptr - get the IH ring buffer wptr
323 * @adev: amdgpu_device pointer
324 * @ih: IH ring buffer to fetch wptr
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.
331 static u32 vega10_ih_get_wptr(struct amdgpu_device *adev,
332 struct amdgpu_ih_ring *ih)
335 struct amdgpu_ih_regs *ih_regs;
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.
341 wptr = le32_to_cpu(*ih->wptr_cpu);
343 if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW))
347 ih_regs = &ih->ih_regs;
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))
354 wptr = REG_SET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW, 0);
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.
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);
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);
371 return (wptr & ih->ptr_mask);
375 * vega10_ih_irq_rearm - rearm IRQ if lost
377 * @adev: amdgpu_device pointer
378 * @ih: IH ring to match
381 static void vega10_ih_irq_rearm(struct amdgpu_device *adev,
382 struct amdgpu_ih_ring *ih)
386 struct amdgpu_ih_regs *ih_regs;
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);
400 * vega10_ih_set_rptr - set the IH ring buffer rptr
402 * @adev: amdgpu_device pointer
403 * @ih: IH ring buffer to set rptr
405 * Set the IH ring buffer rptr.
407 static void vega10_ih_set_rptr(struct amdgpu_device *adev,
408 struct amdgpu_ih_ring *ih)
410 struct amdgpu_ih_regs *ih_regs;
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);
417 if (amdgpu_sriov_vf(adev))
418 vega10_ih_irq_rearm(adev, ih);
420 ih_regs = &ih->ih_regs;
421 WREG32(ih_regs->ih_rb_rptr, ih->rptr);
426 * vega10_ih_self_irq - dispatch work for ring 1 and 2
428 * @adev: amdgpu_device pointer
429 * @source: irq source
430 * @entry: IV with WPTR update
432 * Update the WPTR from the IV and schedule work to handle the entries.
434 static int vega10_ih_self_irq(struct amdgpu_device *adev,
435 struct amdgpu_irq_src *source,
436 struct amdgpu_iv_entry *entry)
438 switch (entry->ring_id) {
440 schedule_work(&adev->irq.ih1_work);
443 schedule_work(&adev->irq.ih2_work);
450 static const struct amdgpu_irq_src_funcs vega10_ih_self_irq_funcs = {
451 .process = vega10_ih_self_irq,
454 static void vega10_ih_set_self_irq_funcs(struct amdgpu_device *adev)
456 adev->irq.self_irq.num_types = 0;
457 adev->irq.self_irq.funcs = &vega10_ih_self_irq_funcs;
460 static int vega10_ih_early_init(void *handle)
462 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
464 vega10_ih_set_interrupt_funcs(adev);
465 vega10_ih_set_self_irq_funcs(adev);
469 static int vega10_ih_sw_init(void *handle)
471 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
474 r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_IH, 0,
475 &adev->irq.self_irq);
479 r = amdgpu_ih_ring_init(adev, &adev->irq.ih, 256 * 1024, true);
483 adev->irq.ih.use_doorbell = true;
484 adev->irq.ih.doorbell_index = adev->doorbell_index.ih << 1;
486 if (!(adev->flags & AMD_IS_APU)) {
487 r = amdgpu_ih_ring_init(adev, &adev->irq.ih1, PAGE_SIZE, true);
491 adev->irq.ih1.use_doorbell = true;
492 adev->irq.ih1.doorbell_index = (adev->doorbell_index.ih + 1) << 1;
494 r = amdgpu_ih_ring_init(adev, &adev->irq.ih2, PAGE_SIZE, true);
498 adev->irq.ih2.use_doorbell = true;
499 adev->irq.ih2.doorbell_index = (adev->doorbell_index.ih + 2) << 1;
501 /* initialize ih control registers offset */
502 vega10_ih_init_register_offset(adev);
504 r = amdgpu_ih_ring_init(adev, &adev->irq.ih_soft, PAGE_SIZE, true);
508 r = amdgpu_irq_init(adev);
513 static int vega10_ih_sw_fini(void *handle)
515 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
517 amdgpu_irq_fini_sw(adev);
522 static int vega10_ih_hw_init(void *handle)
525 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
527 r = vega10_ih_irq_init(adev);
534 static int vega10_ih_hw_fini(void *handle)
536 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
538 vega10_ih_irq_disable(adev);
543 static int vega10_ih_suspend(void *handle)
545 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
547 return vega10_ih_hw_fini(adev);
550 static int vega10_ih_resume(void *handle)
552 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
554 return vega10_ih_hw_init(adev);
557 static bool vega10_ih_is_idle(void *handle)
563 static int vega10_ih_wait_for_idle(void *handle)
569 static int vega10_ih_soft_reset(void *handle)
576 static void vega10_ih_update_clockgating_state(struct amdgpu_device *adev,
579 uint32_t data, def, field_val;
581 if (adev->cg_flags & AMD_CG_SUPPORT_IH_CG) {
582 def = data = RREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL);
583 field_val = enable ? 0 : 1;
585 * Vega10/12 and RAVEN don't have IH_BUFFER_MEM_CLK_SOFT_OVERRIDE field.
587 if (adev->asic_type == CHIP_RENOIR)
588 data = REG_SET_FIELD(data, IH_CLK_CTRL,
589 IH_BUFFER_MEM_CLK_SOFT_OVERRIDE, field_val);
591 data = REG_SET_FIELD(data, IH_CLK_CTRL,
592 DBUS_MUX_CLK_SOFT_OVERRIDE, field_val);
593 data = REG_SET_FIELD(data, IH_CLK_CTRL,
594 OSSSYS_SHARE_CLK_SOFT_OVERRIDE, field_val);
595 data = REG_SET_FIELD(data, IH_CLK_CTRL,
596 LIMIT_SMN_CLK_SOFT_OVERRIDE, field_val);
597 data = REG_SET_FIELD(data, IH_CLK_CTRL,
598 DYN_CLK_SOFT_OVERRIDE, field_val);
599 data = REG_SET_FIELD(data, IH_CLK_CTRL,
600 REG_CLK_SOFT_OVERRIDE, field_val);
602 WREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL, data);
606 static int vega10_ih_set_clockgating_state(void *handle,
607 enum amd_clockgating_state state)
609 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
611 vega10_ih_update_clockgating_state(adev,
612 state == AMD_CG_STATE_GATE);
617 static int vega10_ih_set_powergating_state(void *handle,
618 enum amd_powergating_state state)
623 const struct amd_ip_funcs vega10_ih_ip_funcs = {
625 .early_init = vega10_ih_early_init,
627 .sw_init = vega10_ih_sw_init,
628 .sw_fini = vega10_ih_sw_fini,
629 .hw_init = vega10_ih_hw_init,
630 .hw_fini = vega10_ih_hw_fini,
631 .suspend = vega10_ih_suspend,
632 .resume = vega10_ih_resume,
633 .is_idle = vega10_ih_is_idle,
634 .wait_for_idle = vega10_ih_wait_for_idle,
635 .soft_reset = vega10_ih_soft_reset,
636 .set_clockgating_state = vega10_ih_set_clockgating_state,
637 .set_powergating_state = vega10_ih_set_powergating_state,
640 static const struct amdgpu_ih_funcs vega10_ih_funcs = {
641 .get_wptr = vega10_ih_get_wptr,
642 .decode_iv = amdgpu_ih_decode_iv_helper,
643 .decode_iv_ts = amdgpu_ih_decode_iv_ts_helper,
644 .set_rptr = vega10_ih_set_rptr
647 static void vega10_ih_set_interrupt_funcs(struct amdgpu_device *adev)
649 adev->irq.ih_funcs = &vega10_ih_funcs;
652 const struct amdgpu_ip_block_version vega10_ih_ip_block =
654 .type = AMD_IP_BLOCK_TYPE_IH,
658 .funcs = &vega10_ih_ip_funcs,