Loading...
1/*
2 * Copyright 2015 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 "sid.h"
29#include "si_ih.h"
30#include "oss/oss_1_0_d.h"
31#include "oss/oss_1_0_sh_mask.h"
32
33static void si_ih_set_interrupt_funcs(struct amdgpu_device *adev);
34
35static void si_ih_enable_interrupts(struct amdgpu_device *adev)
36{
37 u32 ih_cntl = RREG32(IH_CNTL);
38 u32 ih_rb_cntl = RREG32(IH_RB_CNTL);
39
40 ih_cntl |= ENABLE_INTR;
41 ih_rb_cntl |= IH_RB_ENABLE;
42 WREG32(IH_CNTL, ih_cntl);
43 WREG32(IH_RB_CNTL, ih_rb_cntl);
44 adev->irq.ih.enabled = true;
45}
46
47static void si_ih_disable_interrupts(struct amdgpu_device *adev)
48{
49 u32 ih_rb_cntl = RREG32(IH_RB_CNTL);
50 u32 ih_cntl = RREG32(IH_CNTL);
51
52 ih_rb_cntl &= ~IH_RB_ENABLE;
53 ih_cntl &= ~ENABLE_INTR;
54 WREG32(IH_RB_CNTL, ih_rb_cntl);
55 WREG32(IH_CNTL, ih_cntl);
56 WREG32(IH_RB_RPTR, 0);
57 WREG32(IH_RB_WPTR, 0);
58 adev->irq.ih.enabled = false;
59 adev->irq.ih.rptr = 0;
60}
61
62static int si_ih_irq_init(struct amdgpu_device *adev)
63{
64 struct amdgpu_ih_ring *ih = &adev->irq.ih;
65 int rb_bufsz;
66 u32 interrupt_cntl, ih_cntl, ih_rb_cntl;
67
68 si_ih_disable_interrupts(adev);
69 /* set dummy read address to dummy page address */
70 WREG32(INTERRUPT_CNTL2, adev->dummy_page_addr >> 8);
71 interrupt_cntl = RREG32(INTERRUPT_CNTL);
72 interrupt_cntl &= ~IH_DUMMY_RD_OVERRIDE;
73 interrupt_cntl &= ~IH_REQ_NONSNOOP_EN;
74 WREG32(INTERRUPT_CNTL, interrupt_cntl);
75
76 WREG32(IH_RB_BASE, adev->irq.ih.gpu_addr >> 8);
77 rb_bufsz = order_base_2(adev->irq.ih.ring_size / 4);
78
79 ih_rb_cntl = IH_WPTR_OVERFLOW_ENABLE |
80 IH_WPTR_OVERFLOW_CLEAR |
81 (rb_bufsz << 1) |
82 IH_WPTR_WRITEBACK_ENABLE;
83
84 WREG32(IH_RB_WPTR_ADDR_LO, lower_32_bits(ih->wptr_addr));
85 WREG32(IH_RB_WPTR_ADDR_HI, upper_32_bits(ih->wptr_addr) & 0xFF);
86 WREG32(IH_RB_CNTL, ih_rb_cntl);
87 WREG32(IH_RB_RPTR, 0);
88 WREG32(IH_RB_WPTR, 0);
89
90 ih_cntl = MC_WRREQ_CREDIT(0x10) | MC_WR_CLEAN_CNT(0x10) | MC_VMID(0);
91 if (adev->irq.msi_enabled)
92 ih_cntl |= RPTR_REARM;
93 WREG32(IH_CNTL, ih_cntl);
94
95 pci_set_master(adev->pdev);
96 si_ih_enable_interrupts(adev);
97
98 return 0;
99}
100
101static void si_ih_irq_disable(struct amdgpu_device *adev)
102{
103 si_ih_disable_interrupts(adev);
104 mdelay(1);
105}
106
107static u32 si_ih_get_wptr(struct amdgpu_device *adev,
108 struct amdgpu_ih_ring *ih)
109{
110 u32 wptr, tmp;
111
112 wptr = le32_to_cpu(*ih->wptr_cpu);
113
114 if (wptr & IH_RB_WPTR__RB_OVERFLOW_MASK) {
115 wptr &= ~IH_RB_WPTR__RB_OVERFLOW_MASK;
116 dev_warn(adev->dev, "IH ring buffer overflow (0x%08X, 0x%08X, 0x%08X)\n",
117 wptr, ih->rptr, (wptr + 16) & ih->ptr_mask);
118 ih->rptr = (wptr + 16) & ih->ptr_mask;
119 tmp = RREG32(IH_RB_CNTL);
120 tmp |= IH_RB_CNTL__WPTR_OVERFLOW_CLEAR_MASK;
121 WREG32(IH_RB_CNTL, tmp);
122
123 /* Unset the CLEAR_OVERFLOW bit immediately so new overflows
124 * can be detected.
125 */
126 tmp &= ~IH_RB_CNTL__WPTR_OVERFLOW_CLEAR_MASK;
127 WREG32(IH_RB_CNTL, tmp);
128 }
129 return (wptr & ih->ptr_mask);
130}
131
132static void si_ih_decode_iv(struct amdgpu_device *adev,
133 struct amdgpu_ih_ring *ih,
134 struct amdgpu_iv_entry *entry)
135{
136 u32 ring_index = ih->rptr >> 2;
137 uint32_t dw[4];
138
139 dw[0] = le32_to_cpu(ih->ring[ring_index + 0]);
140 dw[1] = le32_to_cpu(ih->ring[ring_index + 1]);
141 dw[2] = le32_to_cpu(ih->ring[ring_index + 2]);
142 dw[3] = le32_to_cpu(ih->ring[ring_index + 3]);
143
144 entry->client_id = AMDGPU_IRQ_CLIENTID_LEGACY;
145 entry->src_id = dw[0] & 0xff;
146 entry->src_data[0] = dw[1] & 0xfffffff;
147 entry->ring_id = dw[2] & 0xff;
148 entry->vmid = (dw[2] >> 8) & 0xff;
149
150 ih->rptr += 16;
151}
152
153static void si_ih_set_rptr(struct amdgpu_device *adev,
154 struct amdgpu_ih_ring *ih)
155{
156 WREG32(IH_RB_RPTR, ih->rptr);
157}
158
159static int si_ih_early_init(void *handle)
160{
161 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
162
163 si_ih_set_interrupt_funcs(adev);
164
165 return 0;
166}
167
168static int si_ih_sw_init(void *handle)
169{
170 int r;
171 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
172
173 r = amdgpu_ih_ring_init(adev, &adev->irq.ih, 64 * 1024, false);
174 if (r)
175 return r;
176
177 return amdgpu_irq_init(adev);
178}
179
180static int si_ih_sw_fini(void *handle)
181{
182 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
183
184 amdgpu_irq_fini_sw(adev);
185
186 return 0;
187}
188
189static int si_ih_hw_init(void *handle)
190{
191 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
192
193 return si_ih_irq_init(adev);
194}
195
196static int si_ih_hw_fini(void *handle)
197{
198 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
199
200 si_ih_irq_disable(adev);
201
202 return 0;
203}
204
205static int si_ih_suspend(void *handle)
206{
207 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
208
209 return si_ih_hw_fini(adev);
210}
211
212static int si_ih_resume(void *handle)
213{
214 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
215
216 return si_ih_hw_init(adev);
217}
218
219static bool si_ih_is_idle(void *handle)
220{
221 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
222 u32 tmp = RREG32(SRBM_STATUS);
223
224 if (tmp & SRBM_STATUS__IH_BUSY_MASK)
225 return false;
226
227 return true;
228}
229
230static int si_ih_wait_for_idle(void *handle)
231{
232 unsigned i;
233 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
234
235 for (i = 0; i < adev->usec_timeout; i++) {
236 if (si_ih_is_idle(handle))
237 return 0;
238 udelay(1);
239 }
240 return -ETIMEDOUT;
241}
242
243static int si_ih_soft_reset(void *handle)
244{
245 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
246
247 u32 srbm_soft_reset = 0;
248 u32 tmp = RREG32(SRBM_STATUS);
249
250 if (tmp & SRBM_STATUS__IH_BUSY_MASK)
251 srbm_soft_reset |= SRBM_SOFT_RESET__SOFT_RESET_IH_MASK;
252
253 if (srbm_soft_reset) {
254 tmp = RREG32(SRBM_SOFT_RESET);
255 tmp |= srbm_soft_reset;
256 dev_info(adev->dev, "SRBM_SOFT_RESET=0x%08X\n", tmp);
257 WREG32(SRBM_SOFT_RESET, tmp);
258 tmp = RREG32(SRBM_SOFT_RESET);
259
260 udelay(50);
261
262 tmp &= ~srbm_soft_reset;
263 WREG32(SRBM_SOFT_RESET, tmp);
264 tmp = RREG32(SRBM_SOFT_RESET);
265
266 udelay(50);
267 }
268
269 return 0;
270}
271
272static int si_ih_set_clockgating_state(void *handle,
273 enum amd_clockgating_state state)
274{
275 return 0;
276}
277
278static int si_ih_set_powergating_state(void *handle,
279 enum amd_powergating_state state)
280{
281 return 0;
282}
283
284static const struct amd_ip_funcs si_ih_ip_funcs = {
285 .name = "si_ih",
286 .early_init = si_ih_early_init,
287 .late_init = NULL,
288 .sw_init = si_ih_sw_init,
289 .sw_fini = si_ih_sw_fini,
290 .hw_init = si_ih_hw_init,
291 .hw_fini = si_ih_hw_fini,
292 .suspend = si_ih_suspend,
293 .resume = si_ih_resume,
294 .is_idle = si_ih_is_idle,
295 .wait_for_idle = si_ih_wait_for_idle,
296 .soft_reset = si_ih_soft_reset,
297 .set_clockgating_state = si_ih_set_clockgating_state,
298 .set_powergating_state = si_ih_set_powergating_state,
299};
300
301static const struct amdgpu_ih_funcs si_ih_funcs = {
302 .get_wptr = si_ih_get_wptr,
303 .decode_iv = si_ih_decode_iv,
304 .set_rptr = si_ih_set_rptr
305};
306
307static void si_ih_set_interrupt_funcs(struct amdgpu_device *adev)
308{
309 adev->irq.ih_funcs = &si_ih_funcs;
310}
311
312const struct amdgpu_ip_block_version si_ih_ip_block =
313{
314 .type = AMD_IP_BLOCK_TYPE_IH,
315 .major = 1,
316 .minor = 0,
317 .rev = 0,
318 .funcs = &si_ih_ip_funcs,
319};
1/*
2 * Copyright 2015 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 "si/sid.h"
27#include "si_ih.h"
28
29static void si_ih_set_interrupt_funcs(struct amdgpu_device *adev);
30
31static void si_ih_enable_interrupts(struct amdgpu_device *adev)
32{
33 u32 ih_cntl = RREG32(IH_CNTL);
34 u32 ih_rb_cntl = RREG32(IH_RB_CNTL);
35
36 ih_cntl |= ENABLE_INTR;
37 ih_rb_cntl |= IH_RB_ENABLE;
38 WREG32(IH_CNTL, ih_cntl);
39 WREG32(IH_RB_CNTL, ih_rb_cntl);
40 adev->irq.ih.enabled = true;
41}
42
43static void si_ih_disable_interrupts(struct amdgpu_device *adev)
44{
45 u32 ih_rb_cntl = RREG32(IH_RB_CNTL);
46 u32 ih_cntl = RREG32(IH_CNTL);
47
48 ih_rb_cntl &= ~IH_RB_ENABLE;
49 ih_cntl &= ~ENABLE_INTR;
50 WREG32(IH_RB_CNTL, ih_rb_cntl);
51 WREG32(IH_CNTL, ih_cntl);
52 WREG32(IH_RB_RPTR, 0);
53 WREG32(IH_RB_WPTR, 0);
54 adev->irq.ih.enabled = false;
55 adev->irq.ih.rptr = 0;
56}
57
58static int si_ih_irq_init(struct amdgpu_device *adev)
59{
60 int rb_bufsz;
61 u32 interrupt_cntl, ih_cntl, ih_rb_cntl;
62 u64 wptr_off;
63
64 si_ih_disable_interrupts(adev);
65 WREG32(INTERRUPT_CNTL2, adev->irq.ih.gpu_addr >> 8);
66 interrupt_cntl = RREG32(INTERRUPT_CNTL);
67 interrupt_cntl &= ~IH_DUMMY_RD_OVERRIDE;
68 interrupt_cntl &= ~IH_REQ_NONSNOOP_EN;
69 WREG32(INTERRUPT_CNTL, interrupt_cntl);
70
71 WREG32(IH_RB_BASE, adev->irq.ih.gpu_addr >> 8);
72 rb_bufsz = order_base_2(adev->irq.ih.ring_size / 4);
73
74 ih_rb_cntl = IH_WPTR_OVERFLOW_ENABLE |
75 IH_WPTR_OVERFLOW_CLEAR |
76 (rb_bufsz << 1) |
77 IH_WPTR_WRITEBACK_ENABLE;
78
79 wptr_off = adev->wb.gpu_addr + (adev->irq.ih.wptr_offs * 4);
80 WREG32(IH_RB_WPTR_ADDR_LO, lower_32_bits(wptr_off));
81 WREG32(IH_RB_WPTR_ADDR_HI, upper_32_bits(wptr_off) & 0xFF);
82 WREG32(IH_RB_CNTL, ih_rb_cntl);
83 WREG32(IH_RB_RPTR, 0);
84 WREG32(IH_RB_WPTR, 0);
85
86 ih_cntl = MC_WRREQ_CREDIT(0x10) | MC_WR_CLEAN_CNT(0x10) | MC_VMID(0);
87 if (adev->irq.msi_enabled)
88 ih_cntl |= RPTR_REARM;
89 WREG32(IH_CNTL, ih_cntl);
90
91 pci_set_master(adev->pdev);
92 si_ih_enable_interrupts(adev);
93
94 return 0;
95}
96
97static void si_ih_irq_disable(struct amdgpu_device *adev)
98{
99 si_ih_disable_interrupts(adev);
100 mdelay(1);
101}
102
103static u32 si_ih_get_wptr(struct amdgpu_device *adev)
104{
105 u32 wptr, tmp;
106
107 wptr = le32_to_cpu(adev->wb.wb[adev->irq.ih.wptr_offs]);
108
109 if (wptr & IH_RB_WPTR__RB_OVERFLOW_MASK) {
110 wptr &= ~IH_RB_WPTR__RB_OVERFLOW_MASK;
111 dev_warn(adev->dev, "IH ring buffer overflow (0x%08X, 0x%08X, 0x%08X)\n",
112 wptr, adev->irq.ih.rptr, (wptr + 16) & adev->irq.ih.ptr_mask);
113 adev->irq.ih.rptr = (wptr + 16) & adev->irq.ih.ptr_mask;
114 tmp = RREG32(IH_RB_CNTL);
115 tmp |= IH_RB_CNTL__WPTR_OVERFLOW_CLEAR_MASK;
116 WREG32(IH_RB_CNTL, tmp);
117 }
118 return (wptr & adev->irq.ih.ptr_mask);
119}
120
121static void si_ih_decode_iv(struct amdgpu_device *adev,
122 struct amdgpu_iv_entry *entry)
123{
124 u32 ring_index = adev->irq.ih.rptr >> 2;
125 uint32_t dw[4];
126
127 dw[0] = le32_to_cpu(adev->irq.ih.ring[ring_index + 0]);
128 dw[1] = le32_to_cpu(adev->irq.ih.ring[ring_index + 1]);
129 dw[2] = le32_to_cpu(adev->irq.ih.ring[ring_index + 2]);
130 dw[3] = le32_to_cpu(adev->irq.ih.ring[ring_index + 3]);
131
132 entry->src_id = dw[0] & 0xff;
133 entry->src_data = dw[1] & 0xfffffff;
134 entry->ring_id = dw[2] & 0xff;
135 entry->vm_id = (dw[2] >> 8) & 0xff;
136
137 adev->irq.ih.rptr += 16;
138}
139
140static void si_ih_set_rptr(struct amdgpu_device *adev)
141{
142 WREG32(IH_RB_RPTR, adev->irq.ih.rptr);
143}
144
145static int si_ih_early_init(void *handle)
146{
147 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
148
149 si_ih_set_interrupt_funcs(adev);
150
151 return 0;
152}
153
154static int si_ih_sw_init(void *handle)
155{
156 int r;
157 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
158
159 r = amdgpu_ih_ring_init(adev, 64 * 1024, false);
160 if (r)
161 return r;
162
163 return amdgpu_irq_init(adev);
164}
165
166static int si_ih_sw_fini(void *handle)
167{
168 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
169
170 amdgpu_irq_fini(adev);
171 amdgpu_ih_ring_fini(adev);
172
173 return 0;
174}
175
176static int si_ih_hw_init(void *handle)
177{
178 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
179
180 return si_ih_irq_init(adev);
181}
182
183static int si_ih_hw_fini(void *handle)
184{
185 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
186
187 si_ih_irq_disable(adev);
188
189 return 0;
190}
191
192static int si_ih_suspend(void *handle)
193{
194 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
195
196 return si_ih_hw_fini(adev);
197}
198
199static int si_ih_resume(void *handle)
200{
201 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
202
203 return si_ih_hw_init(adev);
204}
205
206static bool si_ih_is_idle(void *handle)
207{
208 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
209 u32 tmp = RREG32(SRBM_STATUS);
210
211 if (tmp & SRBM_STATUS__IH_BUSY_MASK)
212 return false;
213
214 return true;
215}
216
217static int si_ih_wait_for_idle(void *handle)
218{
219 unsigned i;
220 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
221
222 for (i = 0; i < adev->usec_timeout; i++) {
223 if (si_ih_is_idle(handle))
224 return 0;
225 udelay(1);
226 }
227 return -ETIMEDOUT;
228}
229
230static int si_ih_soft_reset(void *handle)
231{
232 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
233
234 u32 srbm_soft_reset = 0;
235 u32 tmp = RREG32(SRBM_STATUS);
236
237 if (tmp & SRBM_STATUS__IH_BUSY_MASK)
238 srbm_soft_reset |= SRBM_SOFT_RESET__SOFT_RESET_IH_MASK;
239
240 if (srbm_soft_reset) {
241 tmp = RREG32(SRBM_SOFT_RESET);
242 tmp |= srbm_soft_reset;
243 dev_info(adev->dev, "SRBM_SOFT_RESET=0x%08X\n", tmp);
244 WREG32(SRBM_SOFT_RESET, tmp);
245 tmp = RREG32(SRBM_SOFT_RESET);
246
247 udelay(50);
248
249 tmp &= ~srbm_soft_reset;
250 WREG32(SRBM_SOFT_RESET, tmp);
251 tmp = RREG32(SRBM_SOFT_RESET);
252
253 udelay(50);
254 }
255
256 return 0;
257}
258
259static int si_ih_set_clockgating_state(void *handle,
260 enum amd_clockgating_state state)
261{
262 return 0;
263}
264
265static int si_ih_set_powergating_state(void *handle,
266 enum amd_powergating_state state)
267{
268 return 0;
269}
270
271static const struct amd_ip_funcs si_ih_ip_funcs = {
272 .name = "si_ih",
273 .early_init = si_ih_early_init,
274 .late_init = NULL,
275 .sw_init = si_ih_sw_init,
276 .sw_fini = si_ih_sw_fini,
277 .hw_init = si_ih_hw_init,
278 .hw_fini = si_ih_hw_fini,
279 .suspend = si_ih_suspend,
280 .resume = si_ih_resume,
281 .is_idle = si_ih_is_idle,
282 .wait_for_idle = si_ih_wait_for_idle,
283 .soft_reset = si_ih_soft_reset,
284 .set_clockgating_state = si_ih_set_clockgating_state,
285 .set_powergating_state = si_ih_set_powergating_state,
286};
287
288static const struct amdgpu_ih_funcs si_ih_funcs = {
289 .get_wptr = si_ih_get_wptr,
290 .decode_iv = si_ih_decode_iv,
291 .set_rptr = si_ih_set_rptr
292};
293
294static void si_ih_set_interrupt_funcs(struct amdgpu_device *adev)
295{
296 if (adev->irq.ih_funcs == NULL)
297 adev->irq.ih_funcs = &si_ih_funcs;
298}
299
300const struct amdgpu_ip_block_version si_ih_ip_block =
301{
302 .type = AMD_IP_BLOCK_TYPE_IH,
303 .major = 1,
304 .minor = 0,
305 .rev = 0,
306 .funcs = &si_ih_ip_funcs,
307};