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1/*
2 * Copyright 2012 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 "cikd.h"
29
30#include "bif/bif_4_1_d.h"
31#include "bif/bif_4_1_sh_mask.h"
32
33#include "oss/oss_2_0_d.h"
34#include "oss/oss_2_0_sh_mask.h"
35
36/*
37 * Interrupts
38 * Starting with r6xx, interrupts are handled via a ring buffer.
39 * Ring buffers are areas of GPU accessible memory that the GPU
40 * writes interrupt vectors into and the host reads vectors out of.
41 * There is a rptr (read pointer) that determines where the
42 * host is currently reading, and a wptr (write pointer)
43 * which determines where the GPU has written. When the
44 * pointers are equal, the ring is idle. When the GPU
45 * writes vectors to the ring buffer, it increments the
46 * wptr. When there is an interrupt, the host then starts
47 * fetching commands and processing them until the pointers are
48 * equal again at which point it updates the rptr.
49 */
50
51static void cik_ih_set_interrupt_funcs(struct amdgpu_device *adev);
52
53/**
54 * cik_ih_enable_interrupts - Enable the interrupt ring buffer
55 *
56 * @adev: amdgpu_device pointer
57 *
58 * Enable the interrupt ring buffer (CIK).
59 */
60static void cik_ih_enable_interrupts(struct amdgpu_device *adev)
61{
62 u32 ih_cntl = RREG32(mmIH_CNTL);
63 u32 ih_rb_cntl = RREG32(mmIH_RB_CNTL);
64
65 ih_cntl |= IH_CNTL__ENABLE_INTR_MASK;
66 ih_rb_cntl |= IH_RB_CNTL__RB_ENABLE_MASK;
67 WREG32(mmIH_CNTL, ih_cntl);
68 WREG32(mmIH_RB_CNTL, ih_rb_cntl);
69 adev->irq.ih.enabled = true;
70}
71
72/**
73 * cik_ih_disable_interrupts - Disable the interrupt ring buffer
74 *
75 * @adev: amdgpu_device pointer
76 *
77 * Disable the interrupt ring buffer (CIK).
78 */
79static void cik_ih_disable_interrupts(struct amdgpu_device *adev)
80{
81 u32 ih_rb_cntl = RREG32(mmIH_RB_CNTL);
82 u32 ih_cntl = RREG32(mmIH_CNTL);
83
84 ih_rb_cntl &= ~IH_RB_CNTL__RB_ENABLE_MASK;
85 ih_cntl &= ~IH_CNTL__ENABLE_INTR_MASK;
86 WREG32(mmIH_RB_CNTL, ih_rb_cntl);
87 WREG32(mmIH_CNTL, ih_cntl);
88 /* set rptr, wptr to 0 */
89 WREG32(mmIH_RB_RPTR, 0);
90 WREG32(mmIH_RB_WPTR, 0);
91 adev->irq.ih.enabled = false;
92 adev->irq.ih.rptr = 0;
93}
94
95/**
96 * cik_ih_irq_init - init and enable the interrupt ring
97 *
98 * @adev: amdgpu_device pointer
99 *
100 * Allocate a ring buffer for the interrupt controller,
101 * enable the RLC, disable interrupts, enable the IH
102 * ring buffer and enable it (CIK).
103 * Called at device load and reume.
104 * Returns 0 for success, errors for failure.
105 */
106static int cik_ih_irq_init(struct amdgpu_device *adev)
107{
108 struct amdgpu_ih_ring *ih = &adev->irq.ih;
109 int rb_bufsz;
110 u32 interrupt_cntl, ih_cntl, ih_rb_cntl;
111
112 /* disable irqs */
113 cik_ih_disable_interrupts(adev);
114
115 /* setup interrupt control */
116 WREG32(mmINTERRUPT_CNTL2, adev->dummy_page_addr >> 8);
117 interrupt_cntl = RREG32(mmINTERRUPT_CNTL);
118 /* INTERRUPT_CNTL__IH_DUMMY_RD_OVERRIDE_MASK=0 - dummy read disabled with msi, enabled without msi
119 * INTERRUPT_CNTL__IH_DUMMY_RD_OVERRIDE_MASK=1 - dummy read controlled by IH_DUMMY_RD_EN
120 */
121 interrupt_cntl &= ~INTERRUPT_CNTL__IH_DUMMY_RD_OVERRIDE_MASK;
122 /* INTERRUPT_CNTL__IH_REQ_NONSNOOP_EN_MASK=1 if ring is in non-cacheable memory, e.g., vram */
123 interrupt_cntl &= ~INTERRUPT_CNTL__IH_REQ_NONSNOOP_EN_MASK;
124 WREG32(mmINTERRUPT_CNTL, interrupt_cntl);
125
126 WREG32(mmIH_RB_BASE, adev->irq.ih.gpu_addr >> 8);
127 rb_bufsz = order_base_2(adev->irq.ih.ring_size / 4);
128
129 ih_rb_cntl = (IH_RB_CNTL__WPTR_OVERFLOW_ENABLE_MASK |
130 IH_RB_CNTL__WPTR_OVERFLOW_CLEAR_MASK |
131 (rb_bufsz << 1));
132
133 ih_rb_cntl |= IH_RB_CNTL__WPTR_WRITEBACK_ENABLE_MASK;
134
135 /* set the writeback address whether it's enabled or not */
136 WREG32(mmIH_RB_WPTR_ADDR_LO, lower_32_bits(ih->wptr_addr));
137 WREG32(mmIH_RB_WPTR_ADDR_HI, upper_32_bits(ih->wptr_addr) & 0xFF);
138
139 WREG32(mmIH_RB_CNTL, ih_rb_cntl);
140
141 /* set rptr, wptr to 0 */
142 WREG32(mmIH_RB_RPTR, 0);
143 WREG32(mmIH_RB_WPTR, 0);
144
145 /* Default settings for IH_CNTL (disabled at first) */
146 ih_cntl = (0x10 << IH_CNTL__MC_WRREQ_CREDIT__SHIFT) |
147 (0x10 << IH_CNTL__MC_WR_CLEAN_CNT__SHIFT) |
148 (0 << IH_CNTL__MC_VMID__SHIFT);
149 /* IH_CNTL__RPTR_REARM_MASK only works if msi's are enabled */
150 if (adev->irq.msi_enabled)
151 ih_cntl |= IH_CNTL__RPTR_REARM_MASK;
152 WREG32(mmIH_CNTL, ih_cntl);
153
154 pci_set_master(adev->pdev);
155
156 /* enable irqs */
157 cik_ih_enable_interrupts(adev);
158
159 return 0;
160}
161
162/**
163 * cik_ih_irq_disable - disable interrupts
164 *
165 * @adev: amdgpu_device pointer
166 *
167 * Disable interrupts on the hw (CIK).
168 */
169static void cik_ih_irq_disable(struct amdgpu_device *adev)
170{
171 cik_ih_disable_interrupts(adev);
172 /* Wait and acknowledge irq */
173 mdelay(1);
174}
175
176/**
177 * cik_ih_get_wptr - get the IH ring buffer wptr
178 *
179 * @adev: amdgpu_device pointer
180 * @ih: IH ring buffer to fetch wptr
181 *
182 * Get the IH ring buffer wptr from either the register
183 * or the writeback memory buffer (CIK). Also check for
184 * ring buffer overflow and deal with it.
185 * Used by cik_irq_process().
186 * Returns the value of the wptr.
187 */
188static u32 cik_ih_get_wptr(struct amdgpu_device *adev,
189 struct amdgpu_ih_ring *ih)
190{
191 u32 wptr, tmp;
192
193 wptr = le32_to_cpu(*ih->wptr_cpu);
194
195 if (wptr & IH_RB_WPTR__RB_OVERFLOW_MASK) {
196 wptr &= ~IH_RB_WPTR__RB_OVERFLOW_MASK;
197 /* When a ring buffer overflow happen start parsing interrupt
198 * from the last not overwritten vector (wptr + 16). Hopefully
199 * this should allow us to catchup.
200 */
201 dev_warn(adev->dev, "IH ring buffer overflow (0x%08X, 0x%08X, 0x%08X)\n",
202 wptr, ih->rptr, (wptr + 16) & ih->ptr_mask);
203 ih->rptr = (wptr + 16) & ih->ptr_mask;
204 tmp = RREG32(mmIH_RB_CNTL);
205 tmp |= IH_RB_CNTL__WPTR_OVERFLOW_CLEAR_MASK;
206 WREG32(mmIH_RB_CNTL, tmp);
207
208 /* Unset the CLEAR_OVERFLOW bit immediately so new overflows
209 * can be detected.
210 */
211 tmp &= ~IH_RB_CNTL__WPTR_OVERFLOW_CLEAR_MASK;
212 WREG32(mmIH_RB_CNTL, tmp);
213 }
214 return (wptr & ih->ptr_mask);
215}
216
217/* CIK IV Ring
218 * Each IV ring entry is 128 bits:
219 * [7:0] - interrupt source id
220 * [31:8] - reserved
221 * [59:32] - interrupt source data
222 * [63:60] - reserved
223 * [71:64] - RINGID
224 * CP:
225 * ME_ID [1:0], PIPE_ID[1:0], QUEUE_ID[2:0]
226 * QUEUE_ID - for compute, which of the 8 queues owned by the dispatcher
227 * - for gfx, hw shader state (0=PS...5=LS, 6=CS)
228 * ME_ID - 0 = gfx, 1 = first 4 CS pipes, 2 = second 4 CS pipes
229 * PIPE_ID - ME0 0=3D
230 * - ME1&2 compute dispatcher (4 pipes each)
231 * SDMA:
232 * INSTANCE_ID [1:0], QUEUE_ID[1:0]
233 * INSTANCE_ID - 0 = sdma0, 1 = sdma1
234 * QUEUE_ID - 0 = gfx, 1 = rlc0, 2 = rlc1
235 * [79:72] - VMID
236 * [95:80] - PASID
237 * [127:96] - reserved
238 */
239
240 /**
241 * cik_ih_decode_iv - decode an interrupt vector
242 *
243 * @adev: amdgpu_device pointer
244 *
245 * Decodes the interrupt vector at the current rptr
246 * position and also advance the position.
247 */
248static void cik_ih_decode_iv(struct amdgpu_device *adev,
249 struct amdgpu_ih_ring *ih,
250 struct amdgpu_iv_entry *entry)
251{
252 /* wptr/rptr are in bytes! */
253 u32 ring_index = ih->rptr >> 2;
254 uint32_t dw[4];
255
256 dw[0] = le32_to_cpu(ih->ring[ring_index + 0]);
257 dw[1] = le32_to_cpu(ih->ring[ring_index + 1]);
258 dw[2] = le32_to_cpu(ih->ring[ring_index + 2]);
259 dw[3] = le32_to_cpu(ih->ring[ring_index + 3]);
260
261 entry->client_id = AMDGPU_IRQ_CLIENTID_LEGACY;
262 entry->src_id = dw[0] & 0xff;
263 entry->src_data[0] = dw[1] & 0xfffffff;
264 entry->ring_id = dw[2] & 0xff;
265 entry->vmid = (dw[2] >> 8) & 0xff;
266 entry->pasid = (dw[2] >> 16) & 0xffff;
267
268 /* wptr/rptr are in bytes! */
269 ih->rptr += 16;
270}
271
272/**
273 * cik_ih_set_rptr - set the IH ring buffer rptr
274 *
275 * @adev: amdgpu_device pointer
276 * @ih: IH ring buffer to set wptr
277 *
278 * Set the IH ring buffer rptr.
279 */
280static void cik_ih_set_rptr(struct amdgpu_device *adev,
281 struct amdgpu_ih_ring *ih)
282{
283 WREG32(mmIH_RB_RPTR, ih->rptr);
284}
285
286static int cik_ih_early_init(void *handle)
287{
288 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
289 int ret;
290
291 ret = amdgpu_irq_add_domain(adev);
292 if (ret)
293 return ret;
294
295 cik_ih_set_interrupt_funcs(adev);
296
297 return 0;
298}
299
300static int cik_ih_sw_init(void *handle)
301{
302 int r;
303 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
304
305 r = amdgpu_ih_ring_init(adev, &adev->irq.ih, 64 * 1024, false);
306 if (r)
307 return r;
308
309 r = amdgpu_irq_init(adev);
310
311 return r;
312}
313
314static int cik_ih_sw_fini(void *handle)
315{
316 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
317
318 amdgpu_irq_fini_sw(adev);
319 amdgpu_irq_remove_domain(adev);
320
321 return 0;
322}
323
324static int cik_ih_hw_init(void *handle)
325{
326 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
327
328 return cik_ih_irq_init(adev);
329}
330
331static int cik_ih_hw_fini(void *handle)
332{
333 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
334
335 cik_ih_irq_disable(adev);
336
337 return 0;
338}
339
340static int cik_ih_suspend(void *handle)
341{
342 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
343
344 return cik_ih_hw_fini(adev);
345}
346
347static int cik_ih_resume(void *handle)
348{
349 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
350
351 return cik_ih_hw_init(adev);
352}
353
354static bool cik_ih_is_idle(void *handle)
355{
356 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
357 u32 tmp = RREG32(mmSRBM_STATUS);
358
359 if (tmp & SRBM_STATUS__IH_BUSY_MASK)
360 return false;
361
362 return true;
363}
364
365static int cik_ih_wait_for_idle(void *handle)
366{
367 unsigned i;
368 u32 tmp;
369 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
370
371 for (i = 0; i < adev->usec_timeout; i++) {
372 /* read MC_STATUS */
373 tmp = RREG32(mmSRBM_STATUS) & SRBM_STATUS__IH_BUSY_MASK;
374 if (!tmp)
375 return 0;
376 udelay(1);
377 }
378 return -ETIMEDOUT;
379}
380
381static int cik_ih_soft_reset(void *handle)
382{
383 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
384
385 u32 srbm_soft_reset = 0;
386 u32 tmp = RREG32(mmSRBM_STATUS);
387
388 if (tmp & SRBM_STATUS__IH_BUSY_MASK)
389 srbm_soft_reset |= SRBM_SOFT_RESET__SOFT_RESET_IH_MASK;
390
391 if (srbm_soft_reset) {
392 tmp = RREG32(mmSRBM_SOFT_RESET);
393 tmp |= srbm_soft_reset;
394 dev_info(adev->dev, "SRBM_SOFT_RESET=0x%08X\n", tmp);
395 WREG32(mmSRBM_SOFT_RESET, tmp);
396 tmp = RREG32(mmSRBM_SOFT_RESET);
397
398 udelay(50);
399
400 tmp &= ~srbm_soft_reset;
401 WREG32(mmSRBM_SOFT_RESET, tmp);
402 tmp = RREG32(mmSRBM_SOFT_RESET);
403
404 /* Wait a little for things to settle down */
405 udelay(50);
406 }
407
408 return 0;
409}
410
411static int cik_ih_set_clockgating_state(void *handle,
412 enum amd_clockgating_state state)
413{
414 return 0;
415}
416
417static int cik_ih_set_powergating_state(void *handle,
418 enum amd_powergating_state state)
419{
420 return 0;
421}
422
423static const struct amd_ip_funcs cik_ih_ip_funcs = {
424 .name = "cik_ih",
425 .early_init = cik_ih_early_init,
426 .late_init = NULL,
427 .sw_init = cik_ih_sw_init,
428 .sw_fini = cik_ih_sw_fini,
429 .hw_init = cik_ih_hw_init,
430 .hw_fini = cik_ih_hw_fini,
431 .suspend = cik_ih_suspend,
432 .resume = cik_ih_resume,
433 .is_idle = cik_ih_is_idle,
434 .wait_for_idle = cik_ih_wait_for_idle,
435 .soft_reset = cik_ih_soft_reset,
436 .set_clockgating_state = cik_ih_set_clockgating_state,
437 .set_powergating_state = cik_ih_set_powergating_state,
438};
439
440static const struct amdgpu_ih_funcs cik_ih_funcs = {
441 .get_wptr = cik_ih_get_wptr,
442 .decode_iv = cik_ih_decode_iv,
443 .set_rptr = cik_ih_set_rptr
444};
445
446static void cik_ih_set_interrupt_funcs(struct amdgpu_device *adev)
447{
448 adev->irq.ih_funcs = &cik_ih_funcs;
449}
450
451const struct amdgpu_ip_block_version cik_ih_ip_block = {
452 .type = AMD_IP_BLOCK_TYPE_IH,
453 .major = 2,
454 .minor = 0,
455 .rev = 0,
456 .funcs = &cik_ih_ip_funcs,
457};
1/*
2 * Copyright 2012 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 "drmP.h"
24#include "amdgpu.h"
25#include "amdgpu_ih.h"
26#include "cikd.h"
27
28#include "bif/bif_4_1_d.h"
29#include "bif/bif_4_1_sh_mask.h"
30
31#include "oss/oss_2_0_d.h"
32#include "oss/oss_2_0_sh_mask.h"
33
34/*
35 * Interrupts
36 * Starting with r6xx, interrupts are handled via a ring buffer.
37 * Ring buffers are areas of GPU accessible memory that the GPU
38 * writes interrupt vectors into and the host reads vectors out of.
39 * There is a rptr (read pointer) that determines where the
40 * host is currently reading, and a wptr (write pointer)
41 * which determines where the GPU has written. When the
42 * pointers are equal, the ring is idle. When the GPU
43 * writes vectors to the ring buffer, it increments the
44 * wptr. When there is an interrupt, the host then starts
45 * fetching commands and processing them until the pointers are
46 * equal again at which point it updates the rptr.
47 */
48
49static void cik_ih_set_interrupt_funcs(struct amdgpu_device *adev);
50
51/**
52 * cik_ih_enable_interrupts - Enable the interrupt ring buffer
53 *
54 * @adev: amdgpu_device pointer
55 *
56 * Enable the interrupt ring buffer (CIK).
57 */
58static void cik_ih_enable_interrupts(struct amdgpu_device *adev)
59{
60 u32 ih_cntl = RREG32(mmIH_CNTL);
61 u32 ih_rb_cntl = RREG32(mmIH_RB_CNTL);
62
63 ih_cntl |= IH_CNTL__ENABLE_INTR_MASK;
64 ih_rb_cntl |= IH_RB_CNTL__RB_ENABLE_MASK;
65 WREG32(mmIH_CNTL, ih_cntl);
66 WREG32(mmIH_RB_CNTL, ih_rb_cntl);
67 adev->irq.ih.enabled = true;
68}
69
70/**
71 * cik_ih_disable_interrupts - Disable the interrupt ring buffer
72 *
73 * @adev: amdgpu_device pointer
74 *
75 * Disable the interrupt ring buffer (CIK).
76 */
77static void cik_ih_disable_interrupts(struct amdgpu_device *adev)
78{
79 u32 ih_rb_cntl = RREG32(mmIH_RB_CNTL);
80 u32 ih_cntl = RREG32(mmIH_CNTL);
81
82 ih_rb_cntl &= ~IH_RB_CNTL__RB_ENABLE_MASK;
83 ih_cntl &= ~IH_CNTL__ENABLE_INTR_MASK;
84 WREG32(mmIH_RB_CNTL, ih_rb_cntl);
85 WREG32(mmIH_CNTL, ih_cntl);
86 /* set rptr, wptr to 0 */
87 WREG32(mmIH_RB_RPTR, 0);
88 WREG32(mmIH_RB_WPTR, 0);
89 adev->irq.ih.enabled = false;
90 adev->irq.ih.rptr = 0;
91}
92
93/**
94 * cik_ih_irq_init - init and enable the interrupt ring
95 *
96 * @adev: amdgpu_device pointer
97 *
98 * Allocate a ring buffer for the interrupt controller,
99 * enable the RLC, disable interrupts, enable the IH
100 * ring buffer and enable it (CIK).
101 * Called at device load and reume.
102 * Returns 0 for success, errors for failure.
103 */
104static int cik_ih_irq_init(struct amdgpu_device *adev)
105{
106 int ret = 0;
107 int rb_bufsz;
108 u32 interrupt_cntl, ih_cntl, ih_rb_cntl;
109 u64 wptr_off;
110
111 /* disable irqs */
112 cik_ih_disable_interrupts(adev);
113
114 /* setup interrupt control */
115 WREG32(mmINTERRUPT_CNTL2, adev->dummy_page.addr >> 8);
116 interrupt_cntl = RREG32(mmINTERRUPT_CNTL);
117 /* INTERRUPT_CNTL__IH_DUMMY_RD_OVERRIDE_MASK=0 - dummy read disabled with msi, enabled without msi
118 * INTERRUPT_CNTL__IH_DUMMY_RD_OVERRIDE_MASK=1 - dummy read controlled by IH_DUMMY_RD_EN
119 */
120 interrupt_cntl &= ~INTERRUPT_CNTL__IH_DUMMY_RD_OVERRIDE_MASK;
121 /* INTERRUPT_CNTL__IH_REQ_NONSNOOP_EN_MASK=1 if ring is in non-cacheable memory, e.g., vram */
122 interrupt_cntl &= ~INTERRUPT_CNTL__IH_REQ_NONSNOOP_EN_MASK;
123 WREG32(mmINTERRUPT_CNTL, interrupt_cntl);
124
125 WREG32(mmIH_RB_BASE, adev->irq.ih.gpu_addr >> 8);
126 rb_bufsz = order_base_2(adev->irq.ih.ring_size / 4);
127
128 ih_rb_cntl = (IH_RB_CNTL__WPTR_OVERFLOW_ENABLE_MASK |
129 IH_RB_CNTL__WPTR_OVERFLOW_CLEAR_MASK |
130 (rb_bufsz << 1));
131
132 ih_rb_cntl |= IH_RB_CNTL__WPTR_WRITEBACK_ENABLE_MASK;
133
134 /* set the writeback address whether it's enabled or not */
135 wptr_off = adev->wb.gpu_addr + (adev->irq.ih.wptr_offs * 4);
136 WREG32(mmIH_RB_WPTR_ADDR_LO, lower_32_bits(wptr_off));
137 WREG32(mmIH_RB_WPTR_ADDR_HI, upper_32_bits(wptr_off) & 0xFF);
138
139 WREG32(mmIH_RB_CNTL, ih_rb_cntl);
140
141 /* set rptr, wptr to 0 */
142 WREG32(mmIH_RB_RPTR, 0);
143 WREG32(mmIH_RB_WPTR, 0);
144
145 /* Default settings for IH_CNTL (disabled at first) */
146 ih_cntl = (0x10 << IH_CNTL__MC_WRREQ_CREDIT__SHIFT) |
147 (0x10 << IH_CNTL__MC_WR_CLEAN_CNT__SHIFT) |
148 (0 << IH_CNTL__MC_VMID__SHIFT);
149 /* IH_CNTL__RPTR_REARM_MASK only works if msi's are enabled */
150 if (adev->irq.msi_enabled)
151 ih_cntl |= IH_CNTL__RPTR_REARM_MASK;
152 WREG32(mmIH_CNTL, ih_cntl);
153
154 pci_set_master(adev->pdev);
155
156 /* enable irqs */
157 cik_ih_enable_interrupts(adev);
158
159 return ret;
160}
161
162/**
163 * cik_ih_irq_disable - disable interrupts
164 *
165 * @adev: amdgpu_device pointer
166 *
167 * Disable interrupts on the hw (CIK).
168 */
169static void cik_ih_irq_disable(struct amdgpu_device *adev)
170{
171 cik_ih_disable_interrupts(adev);
172 /* Wait and acknowledge irq */
173 mdelay(1);
174}
175
176/**
177 * cik_ih_get_wptr - get the IH ring buffer wptr
178 *
179 * @adev: amdgpu_device pointer
180 *
181 * Get the IH ring buffer wptr from either the register
182 * or the writeback memory buffer (CIK). Also check for
183 * ring buffer overflow and deal with it.
184 * Used by cik_irq_process().
185 * Returns the value of the wptr.
186 */
187static u32 cik_ih_get_wptr(struct amdgpu_device *adev)
188{
189 u32 wptr, tmp;
190
191 wptr = le32_to_cpu(adev->wb.wb[adev->irq.ih.wptr_offs]);
192
193 if (wptr & IH_RB_WPTR__RB_OVERFLOW_MASK) {
194 wptr &= ~IH_RB_WPTR__RB_OVERFLOW_MASK;
195 /* When a ring buffer overflow happen start parsing interrupt
196 * from the last not overwritten vector (wptr + 16). Hopefully
197 * this should allow us to catchup.
198 */
199 dev_warn(adev->dev, "IH ring buffer overflow (0x%08X, 0x%08X, 0x%08X)\n",
200 wptr, adev->irq.ih.rptr, (wptr + 16) & adev->irq.ih.ptr_mask);
201 adev->irq.ih.rptr = (wptr + 16) & adev->irq.ih.ptr_mask;
202 tmp = RREG32(mmIH_RB_CNTL);
203 tmp |= IH_RB_CNTL__WPTR_OVERFLOW_CLEAR_MASK;
204 WREG32(mmIH_RB_CNTL, tmp);
205 }
206 return (wptr & adev->irq.ih.ptr_mask);
207}
208
209/* CIK IV Ring
210 * Each IV ring entry is 128 bits:
211 * [7:0] - interrupt source id
212 * [31:8] - reserved
213 * [59:32] - interrupt source data
214 * [63:60] - reserved
215 * [71:64] - RINGID
216 * CP:
217 * ME_ID [1:0], PIPE_ID[1:0], QUEUE_ID[2:0]
218 * QUEUE_ID - for compute, which of the 8 queues owned by the dispatcher
219 * - for gfx, hw shader state (0=PS...5=LS, 6=CS)
220 * ME_ID - 0 = gfx, 1 = first 4 CS pipes, 2 = second 4 CS pipes
221 * PIPE_ID - ME0 0=3D
222 * - ME1&2 compute dispatcher (4 pipes each)
223 * SDMA:
224 * INSTANCE_ID [1:0], QUEUE_ID[1:0]
225 * INSTANCE_ID - 0 = sdma0, 1 = sdma1
226 * QUEUE_ID - 0 = gfx, 1 = rlc0, 2 = rlc1
227 * [79:72] - VMID
228 * [95:80] - PASID
229 * [127:96] - reserved
230 */
231
232 /**
233 * cik_ih_decode_iv - decode an interrupt vector
234 *
235 * @adev: amdgpu_device pointer
236 *
237 * Decodes the interrupt vector at the current rptr
238 * position and also advance the position.
239 */
240static void cik_ih_decode_iv(struct amdgpu_device *adev,
241 struct amdgpu_iv_entry *entry)
242{
243 /* wptr/rptr are in bytes! */
244 u32 ring_index = adev->irq.ih.rptr >> 2;
245 uint32_t dw[4];
246
247 dw[0] = le32_to_cpu(adev->irq.ih.ring[ring_index + 0]);
248 dw[1] = le32_to_cpu(adev->irq.ih.ring[ring_index + 1]);
249 dw[2] = le32_to_cpu(adev->irq.ih.ring[ring_index + 2]);
250 dw[3] = le32_to_cpu(adev->irq.ih.ring[ring_index + 3]);
251
252 entry->src_id = dw[0] & 0xff;
253 entry->src_data = dw[1] & 0xfffffff;
254 entry->ring_id = dw[2] & 0xff;
255 entry->vm_id = (dw[2] >> 8) & 0xff;
256 entry->pas_id = (dw[2] >> 16) & 0xffff;
257
258 /* wptr/rptr are in bytes! */
259 adev->irq.ih.rptr += 16;
260}
261
262/**
263 * cik_ih_set_rptr - set the IH ring buffer rptr
264 *
265 * @adev: amdgpu_device pointer
266 *
267 * Set the IH ring buffer rptr.
268 */
269static void cik_ih_set_rptr(struct amdgpu_device *adev)
270{
271 WREG32(mmIH_RB_RPTR, adev->irq.ih.rptr);
272}
273
274static int cik_ih_early_init(void *handle)
275{
276 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
277 int ret;
278
279 ret = amdgpu_irq_add_domain(adev);
280 if (ret)
281 return ret;
282
283 cik_ih_set_interrupt_funcs(adev);
284
285 return 0;
286}
287
288static int cik_ih_sw_init(void *handle)
289{
290 int r;
291 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
292
293 r = amdgpu_ih_ring_init(adev, 64 * 1024, false);
294 if (r)
295 return r;
296
297 r = amdgpu_irq_init(adev);
298
299 return r;
300}
301
302static int cik_ih_sw_fini(void *handle)
303{
304 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
305
306 amdgpu_irq_fini(adev);
307 amdgpu_ih_ring_fini(adev);
308 amdgpu_irq_remove_domain(adev);
309
310 return 0;
311}
312
313static int cik_ih_hw_init(void *handle)
314{
315 int r;
316 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
317
318 r = cik_ih_irq_init(adev);
319 if (r)
320 return r;
321
322 return 0;
323}
324
325static int cik_ih_hw_fini(void *handle)
326{
327 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
328
329 cik_ih_irq_disable(adev);
330
331 return 0;
332}
333
334static int cik_ih_suspend(void *handle)
335{
336 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
337
338 return cik_ih_hw_fini(adev);
339}
340
341static int cik_ih_resume(void *handle)
342{
343 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
344
345 return cik_ih_hw_init(adev);
346}
347
348static bool cik_ih_is_idle(void *handle)
349{
350 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
351 u32 tmp = RREG32(mmSRBM_STATUS);
352
353 if (tmp & SRBM_STATUS__IH_BUSY_MASK)
354 return false;
355
356 return true;
357}
358
359static int cik_ih_wait_for_idle(void *handle)
360{
361 unsigned i;
362 u32 tmp;
363 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
364
365 for (i = 0; i < adev->usec_timeout; i++) {
366 /* read MC_STATUS */
367 tmp = RREG32(mmSRBM_STATUS) & SRBM_STATUS__IH_BUSY_MASK;
368 if (!tmp)
369 return 0;
370 udelay(1);
371 }
372 return -ETIMEDOUT;
373}
374
375static void cik_ih_print_status(void *handle)
376{
377 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
378
379 dev_info(adev->dev, "CIK IH registers\n");
380 dev_info(adev->dev, " SRBM_STATUS=0x%08X\n",
381 RREG32(mmSRBM_STATUS));
382 dev_info(adev->dev, " SRBM_STATUS2=0x%08X\n",
383 RREG32(mmSRBM_STATUS2));
384 dev_info(adev->dev, " INTERRUPT_CNTL=0x%08X\n",
385 RREG32(mmINTERRUPT_CNTL));
386 dev_info(adev->dev, " INTERRUPT_CNTL2=0x%08X\n",
387 RREG32(mmINTERRUPT_CNTL2));
388 dev_info(adev->dev, " IH_CNTL=0x%08X\n",
389 RREG32(mmIH_CNTL));
390 dev_info(adev->dev, " IH_RB_CNTL=0x%08X\n",
391 RREG32(mmIH_RB_CNTL));
392 dev_info(adev->dev, " IH_RB_BASE=0x%08X\n",
393 RREG32(mmIH_RB_BASE));
394 dev_info(adev->dev, " IH_RB_WPTR_ADDR_LO=0x%08X\n",
395 RREG32(mmIH_RB_WPTR_ADDR_LO));
396 dev_info(adev->dev, " IH_RB_WPTR_ADDR_HI=0x%08X\n",
397 RREG32(mmIH_RB_WPTR_ADDR_HI));
398 dev_info(adev->dev, " IH_RB_RPTR=0x%08X\n",
399 RREG32(mmIH_RB_RPTR));
400 dev_info(adev->dev, " IH_RB_WPTR=0x%08X\n",
401 RREG32(mmIH_RB_WPTR));
402}
403
404static int cik_ih_soft_reset(void *handle)
405{
406 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
407
408 u32 srbm_soft_reset = 0;
409 u32 tmp = RREG32(mmSRBM_STATUS);
410
411 if (tmp & SRBM_STATUS__IH_BUSY_MASK)
412 srbm_soft_reset |= SRBM_SOFT_RESET__SOFT_RESET_IH_MASK;
413
414 if (srbm_soft_reset) {
415 cik_ih_print_status((void *)adev);
416
417 tmp = RREG32(mmSRBM_SOFT_RESET);
418 tmp |= srbm_soft_reset;
419 dev_info(adev->dev, "SRBM_SOFT_RESET=0x%08X\n", tmp);
420 WREG32(mmSRBM_SOFT_RESET, tmp);
421 tmp = RREG32(mmSRBM_SOFT_RESET);
422
423 udelay(50);
424
425 tmp &= ~srbm_soft_reset;
426 WREG32(mmSRBM_SOFT_RESET, tmp);
427 tmp = RREG32(mmSRBM_SOFT_RESET);
428
429 /* Wait a little for things to settle down */
430 udelay(50);
431
432 cik_ih_print_status((void *)adev);
433 }
434
435 return 0;
436}
437
438static int cik_ih_set_clockgating_state(void *handle,
439 enum amd_clockgating_state state)
440{
441 return 0;
442}
443
444static int cik_ih_set_powergating_state(void *handle,
445 enum amd_powergating_state state)
446{
447 return 0;
448}
449
450const struct amd_ip_funcs cik_ih_ip_funcs = {
451 .early_init = cik_ih_early_init,
452 .late_init = NULL,
453 .sw_init = cik_ih_sw_init,
454 .sw_fini = cik_ih_sw_fini,
455 .hw_init = cik_ih_hw_init,
456 .hw_fini = cik_ih_hw_fini,
457 .suspend = cik_ih_suspend,
458 .resume = cik_ih_resume,
459 .is_idle = cik_ih_is_idle,
460 .wait_for_idle = cik_ih_wait_for_idle,
461 .soft_reset = cik_ih_soft_reset,
462 .print_status = cik_ih_print_status,
463 .set_clockgating_state = cik_ih_set_clockgating_state,
464 .set_powergating_state = cik_ih_set_powergating_state,
465};
466
467static const struct amdgpu_ih_funcs cik_ih_funcs = {
468 .get_wptr = cik_ih_get_wptr,
469 .decode_iv = cik_ih_decode_iv,
470 .set_rptr = cik_ih_set_rptr
471};
472
473static void cik_ih_set_interrupt_funcs(struct amdgpu_device *adev)
474{
475 if (adev->irq.ih_funcs == NULL)
476 adev->irq.ih_funcs = &cik_ih_funcs;
477}