1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright 2018 Marty E. Plummer <hanetzer@startmail.com> */
3 /* Copyright 2019 Linaro, Ltd., Rob Herring <robh@kernel.org> */
4 /* Copyright 2019 Collabora ltd. */
5 #include <linux/bitfield.h>
6 #include <linux/bitmap.h>
7 #include <linux/delay.h>
8 #include <linux/dma-mapping.h>
9 #include <linux/interrupt.h>
10 #include <linux/io.h>
11 #include <linux/iopoll.h>
12 #include <linux/platform_device.h>
13 #include <linux/pm_runtime.h>
14
15 #include "panfrost_device.h"
16 #include "panfrost_features.h"
17 #include "panfrost_issues.h"
18 #include "panfrost_gpu.h"
19 #include "panfrost_perfcnt.h"
20 #include "panfrost_regs.h"
21
panfrost_gpu_irq_handler(int irq,void * data)22 static irqreturn_t panfrost_gpu_irq_handler(int irq, void *data)
23 {
24 struct panfrost_device *pfdev = data;
25 u32 state = gpu_read(pfdev, GPU_INT_STAT);
26 u32 fault_status = gpu_read(pfdev, GPU_FAULT_STATUS);
27
28 if (!state)
29 return IRQ_NONE;
30
31 if (state & GPU_IRQ_MASK_ERROR) {
32 u64 address = (u64) gpu_read(pfdev, GPU_FAULT_ADDRESS_HI) << 32;
33 address |= gpu_read(pfdev, GPU_FAULT_ADDRESS_LO);
34
35 dev_warn(pfdev->dev, "GPU Fault 0x%08x (%s) at 0x%016llx\n",
36 fault_status, panfrost_exception_name(fault_status & 0xFF),
37 address);
38
39 if (state & GPU_IRQ_MULTIPLE_FAULT)
40 dev_warn(pfdev->dev, "There were multiple GPU faults - some have not been reported\n");
41
42 gpu_write(pfdev, GPU_INT_MASK, 0);
43 }
44
45 if (state & GPU_IRQ_PERFCNT_SAMPLE_COMPLETED)
46 panfrost_perfcnt_sample_done(pfdev);
47
48 if (state & GPU_IRQ_CLEAN_CACHES_COMPLETED)
49 panfrost_perfcnt_clean_cache_done(pfdev);
50
51 gpu_write(pfdev, GPU_INT_CLEAR, state);
52
53 return IRQ_HANDLED;
54 }
55
panfrost_gpu_soft_reset(struct panfrost_device * pfdev)56 int panfrost_gpu_soft_reset(struct panfrost_device *pfdev)
57 {
58 int ret;
59 u32 val;
60
61 gpu_write(pfdev, GPU_INT_MASK, 0);
62 gpu_write(pfdev, GPU_INT_CLEAR, GPU_IRQ_RESET_COMPLETED);
63 gpu_write(pfdev, GPU_CMD, GPU_CMD_SOFT_RESET);
64
65 ret = readl_relaxed_poll_timeout(pfdev->iomem + GPU_INT_RAWSTAT,
66 val, val & GPU_IRQ_RESET_COMPLETED, 100, 10000);
67
68 if (ret) {
69 dev_err(pfdev->dev, "gpu soft reset timed out\n");
70 return ret;
71 }
72
73 gpu_write(pfdev, GPU_INT_CLEAR, GPU_IRQ_MASK_ALL);
74 gpu_write(pfdev, GPU_INT_MASK, GPU_IRQ_MASK_ALL);
75
76 return 0;
77 }
78
panfrost_gpu_amlogic_quirk(struct panfrost_device * pfdev)79 void panfrost_gpu_amlogic_quirk(struct panfrost_device *pfdev)
80 {
81 /*
82 * The Amlogic integrated Mali-T820, Mali-G31 & Mali-G52 needs
83 * these undocumented bits in GPU_PWR_OVERRIDE1 to be set in order
84 * to operate correctly.
85 */
86 gpu_write(pfdev, GPU_PWR_KEY, GPU_PWR_KEY_UNLOCK);
87 gpu_write(pfdev, GPU_PWR_OVERRIDE1, 0xfff | (0x20 << 16));
88 }
89
panfrost_gpu_init_quirks(struct panfrost_device * pfdev)90 static void panfrost_gpu_init_quirks(struct panfrost_device *pfdev)
91 {
92 u32 quirks = 0;
93
94 if (panfrost_has_hw_issue(pfdev, HW_ISSUE_8443) ||
95 panfrost_has_hw_issue(pfdev, HW_ISSUE_11035))
96 quirks |= SC_LS_PAUSEBUFFER_DISABLE;
97
98 if (panfrost_has_hw_issue(pfdev, HW_ISSUE_10327))
99 quirks |= SC_SDC_DISABLE_OQ_DISCARD;
100
101 if (panfrost_has_hw_issue(pfdev, HW_ISSUE_10797))
102 quirks |= SC_ENABLE_TEXGRD_FLAGS;
103
104 if (!panfrost_has_hw_issue(pfdev, GPUCORE_1619)) {
105 if (panfrost_model_cmp(pfdev, 0x750) < 0) /* T60x, T62x, T72x */
106 quirks |= SC_LS_ATTR_CHECK_DISABLE;
107 else if (panfrost_model_cmp(pfdev, 0x880) <= 0) /* T76x, T8xx */
108 quirks |= SC_LS_ALLOW_ATTR_TYPES;
109 }
110
111 if (panfrost_has_hw_feature(pfdev, HW_FEATURE_TLS_HASHING))
112 quirks |= SC_TLS_HASH_ENABLE;
113
114 if (quirks)
115 gpu_write(pfdev, GPU_SHADER_CONFIG, quirks);
116
117
118 quirks = gpu_read(pfdev, GPU_TILER_CONFIG);
119
120 /* Set tiler clock gate override if required */
121 if (panfrost_has_hw_issue(pfdev, HW_ISSUE_T76X_3953))
122 quirks |= TC_CLOCK_GATE_OVERRIDE;
123
124 gpu_write(pfdev, GPU_TILER_CONFIG, quirks);
125
126
127 quirks = gpu_read(pfdev, GPU_L2_MMU_CONFIG);
128
129 /* Limit read & write ID width for AXI */
130 if (panfrost_has_hw_feature(pfdev, HW_FEATURE_3BIT_EXT_RW_L2_MMU_CONFIG))
131 quirks &= ~(L2_MMU_CONFIG_3BIT_LIMIT_EXTERNAL_READS |
132 L2_MMU_CONFIG_3BIT_LIMIT_EXTERNAL_WRITES);
133 else
134 quirks &= ~(L2_MMU_CONFIG_LIMIT_EXTERNAL_READS |
135 L2_MMU_CONFIG_LIMIT_EXTERNAL_WRITES);
136
137 gpu_write(pfdev, GPU_L2_MMU_CONFIG, quirks);
138
139 quirks = 0;
140 if ((panfrost_model_eq(pfdev, 0x860) || panfrost_model_eq(pfdev, 0x880)) &&
141 pfdev->features.revision >= 0x2000)
142 quirks |= JM_MAX_JOB_THROTTLE_LIMIT << JM_JOB_THROTTLE_LIMIT_SHIFT;
143 else if (panfrost_model_eq(pfdev, 0x6000) &&
144 pfdev->features.coherency_features == COHERENCY_ACE)
145 quirks |= (COHERENCY_ACE_LITE | COHERENCY_ACE) <<
146 JM_FORCE_COHERENCY_FEATURES_SHIFT;
147
148 if (panfrost_has_hw_feature(pfdev, HW_FEATURE_IDVS_GROUP_SIZE))
149 quirks |= JM_DEFAULT_IDVS_GROUP_SIZE << JM_IDVS_GROUP_SIZE_SHIFT;
150
151 if (quirks)
152 gpu_write(pfdev, GPU_JM_CONFIG, quirks);
153
154 /* Here goes platform specific quirks */
155 if (pfdev->comp->vendor_quirk)
156 pfdev->comp->vendor_quirk(pfdev);
157 }
158
159 #define MAX_HW_REVS 6
160
161 struct panfrost_model {
162 const char *name;
163 u32 id;
164 u32 id_mask;
165 u64 features;
166 u64 issues;
167 struct {
168 u32 revision;
169 u64 issues;
170 } revs[MAX_HW_REVS];
171 };
172
173 #define GPU_MODEL(_name, _id, ...) \
174 {\
175 .name = __stringify(_name), \
176 .id = _id, \
177 .features = hw_features_##_name, \
178 .issues = hw_issues_##_name, \
179 .revs = { __VA_ARGS__ }, \
180 }
181
182 #define GPU_REV_EXT(name, _rev, _p, _s, stat) \
183 {\
184 .revision = (_rev) << 12 | (_p) << 4 | (_s), \
185 .issues = hw_issues_##name##_r##_rev##p##_p##stat, \
186 }
187 #define GPU_REV(name, r, p) GPU_REV_EXT(name, r, p, 0, )
188
189 static const struct panfrost_model gpu_models[] = {
190 /* T60x has an oddball version */
191 GPU_MODEL(t600, 0x600,
192 GPU_REV_EXT(t600, 0, 0, 1, _15dev0)),
193 GPU_MODEL(t620, 0x620,
194 GPU_REV(t620, 0, 1), GPU_REV(t620, 1, 0)),
195 GPU_MODEL(t720, 0x720),
196 GPU_MODEL(t760, 0x750,
197 GPU_REV(t760, 0, 0), GPU_REV(t760, 0, 1),
198 GPU_REV_EXT(t760, 0, 1, 0, _50rel0),
199 GPU_REV(t760, 0, 2), GPU_REV(t760, 0, 3)),
200 GPU_MODEL(t820, 0x820),
201 GPU_MODEL(t830, 0x830),
202 GPU_MODEL(t860, 0x860),
203 GPU_MODEL(t880, 0x880),
204
205 GPU_MODEL(g71, 0x6000,
206 GPU_REV_EXT(g71, 0, 0, 1, _05dev0)),
207 GPU_MODEL(g72, 0x6001),
208 GPU_MODEL(g51, 0x7000),
209 GPU_MODEL(g76, 0x7001),
210 GPU_MODEL(g52, 0x7002),
211 GPU_MODEL(g31, 0x7003,
212 GPU_REV(g31, 1, 0)),
213 };
214
panfrost_gpu_init_features(struct panfrost_device * pfdev)215 static void panfrost_gpu_init_features(struct panfrost_device *pfdev)
216 {
217 u32 gpu_id, num_js, major, minor, status, rev;
218 const char *name = "unknown";
219 u64 hw_feat = 0;
220 u64 hw_issues = hw_issues_all;
221 const struct panfrost_model *model;
222 int i;
223
224 pfdev->features.l2_features = gpu_read(pfdev, GPU_L2_FEATURES);
225 pfdev->features.core_features = gpu_read(pfdev, GPU_CORE_FEATURES);
226 pfdev->features.tiler_features = gpu_read(pfdev, GPU_TILER_FEATURES);
227 pfdev->features.mem_features = gpu_read(pfdev, GPU_MEM_FEATURES);
228 pfdev->features.mmu_features = gpu_read(pfdev, GPU_MMU_FEATURES);
229 pfdev->features.thread_features = gpu_read(pfdev, GPU_THREAD_FEATURES);
230 pfdev->features.max_threads = gpu_read(pfdev, GPU_THREAD_MAX_THREADS);
231 pfdev->features.thread_max_workgroup_sz = gpu_read(pfdev, GPU_THREAD_MAX_WORKGROUP_SIZE);
232 pfdev->features.thread_max_barrier_sz = gpu_read(pfdev, GPU_THREAD_MAX_BARRIER_SIZE);
233 pfdev->features.coherency_features = gpu_read(pfdev, GPU_COHERENCY_FEATURES);
234 pfdev->features.afbc_features = gpu_read(pfdev, GPU_AFBC_FEATURES);
235 for (i = 0; i < 4; i++)
236 pfdev->features.texture_features[i] = gpu_read(pfdev, GPU_TEXTURE_FEATURES(i));
237
238 pfdev->features.as_present = gpu_read(pfdev, GPU_AS_PRESENT);
239
240 pfdev->features.js_present = gpu_read(pfdev, GPU_JS_PRESENT);
241 num_js = hweight32(pfdev->features.js_present);
242 for (i = 0; i < num_js; i++)
243 pfdev->features.js_features[i] = gpu_read(pfdev, GPU_JS_FEATURES(i));
244
245 pfdev->features.shader_present = gpu_read(pfdev, GPU_SHADER_PRESENT_LO);
246 pfdev->features.shader_present |= (u64)gpu_read(pfdev, GPU_SHADER_PRESENT_HI) << 32;
247
248 pfdev->features.tiler_present = gpu_read(pfdev, GPU_TILER_PRESENT_LO);
249 pfdev->features.tiler_present |= (u64)gpu_read(pfdev, GPU_TILER_PRESENT_HI) << 32;
250
251 pfdev->features.l2_present = gpu_read(pfdev, GPU_L2_PRESENT_LO);
252 pfdev->features.l2_present |= (u64)gpu_read(pfdev, GPU_L2_PRESENT_HI) << 32;
253 pfdev->features.nr_core_groups = hweight64(pfdev->features.l2_present);
254
255 pfdev->features.stack_present = gpu_read(pfdev, GPU_STACK_PRESENT_LO);
256 pfdev->features.stack_present |= (u64)gpu_read(pfdev, GPU_STACK_PRESENT_HI) << 32;
257
258 pfdev->features.thread_tls_alloc = gpu_read(pfdev, GPU_THREAD_TLS_ALLOC);
259
260 gpu_id = gpu_read(pfdev, GPU_ID);
261 pfdev->features.revision = gpu_id & 0xffff;
262 pfdev->features.id = gpu_id >> 16;
263
264 /* The T60x has an oddball ID value. Fix it up to the standard Midgard
265 * format so we (and userspace) don't have to special case it.
266 */
267 if (pfdev->features.id == 0x6956)
268 pfdev->features.id = 0x0600;
269
270 major = (pfdev->features.revision >> 12) & 0xf;
271 minor = (pfdev->features.revision >> 4) & 0xff;
272 status = pfdev->features.revision & 0xf;
273 rev = pfdev->features.revision;
274
275 gpu_id = pfdev->features.id;
276
277 for (model = gpu_models; model->name; model++) {
278 int best = -1;
279
280 if (!panfrost_model_eq(pfdev, model->id))
281 continue;
282
283 name = model->name;
284 hw_feat = model->features;
285 hw_issues |= model->issues;
286 for (i = 0; i < MAX_HW_REVS; i++) {
287 if (model->revs[i].revision == rev) {
288 best = i;
289 break;
290 } else if (model->revs[i].revision == (rev & ~0xf))
291 best = i;
292 }
293
294 if (best >= 0)
295 hw_issues |= model->revs[best].issues;
296
297 break;
298 }
299
300 bitmap_from_u64(pfdev->features.hw_features, hw_feat);
301 bitmap_from_u64(pfdev->features.hw_issues, hw_issues);
302
303 dev_info(pfdev->dev, "mali-%s id 0x%x major 0x%x minor 0x%x status 0x%x",
304 name, gpu_id, major, minor, status);
305 dev_info(pfdev->dev, "features: %64pb, issues: %64pb",
306 pfdev->features.hw_features,
307 pfdev->features.hw_issues);
308
309 dev_info(pfdev->dev, "Features: L2:0x%08x Shader:0x%08x Tiler:0x%08x Mem:0x%0x MMU:0x%08x AS:0x%x JS:0x%x",
310 pfdev->features.l2_features,
311 pfdev->features.core_features,
312 pfdev->features.tiler_features,
313 pfdev->features.mem_features,
314 pfdev->features.mmu_features,
315 pfdev->features.as_present,
316 pfdev->features.js_present);
317
318 dev_info(pfdev->dev, "shader_present=0x%0llx l2_present=0x%0llx",
319 pfdev->features.shader_present, pfdev->features.l2_present);
320 }
321
panfrost_gpu_power_on(struct panfrost_device * pfdev)322 void panfrost_gpu_power_on(struct panfrost_device *pfdev)
323 {
324 int ret;
325 u32 val;
326 u64 core_mask = U64_MAX;
327
328 panfrost_gpu_init_quirks(pfdev);
329
330 if (pfdev->features.l2_present != 1) {
331 /*
332 * Only support one core group now.
333 * ~(l2_present - 1) unsets all bits in l2_present except
334 * the bottom bit. (l2_present - 2) has all the bits in
335 * the first core group set. AND them together to generate
336 * a mask of cores in the first core group.
337 */
338 core_mask = ~(pfdev->features.l2_present - 1) &
339 (pfdev->features.l2_present - 2);
340 dev_info_once(pfdev->dev, "using only 1st core group (%lu cores from %lu)\n",
341 hweight64(core_mask),
342 hweight64(pfdev->features.shader_present));
343 }
344 gpu_write(pfdev, L2_PWRON_LO, pfdev->features.l2_present & core_mask);
345 ret = readl_relaxed_poll_timeout(pfdev->iomem + L2_READY_LO,
346 val, val == (pfdev->features.l2_present & core_mask),
347 100, 20000);
348 if (ret)
349 dev_err(pfdev->dev, "error powering up gpu L2");
350
351 gpu_write(pfdev, SHADER_PWRON_LO,
352 pfdev->features.shader_present & core_mask);
353 ret = readl_relaxed_poll_timeout(pfdev->iomem + SHADER_READY_LO,
354 val, val == (pfdev->features.shader_present & core_mask),
355 100, 20000);
356 if (ret)
357 dev_err(pfdev->dev, "error powering up gpu shader");
358
359 gpu_write(pfdev, TILER_PWRON_LO, pfdev->features.tiler_present);
360 ret = readl_relaxed_poll_timeout(pfdev->iomem + TILER_READY_LO,
361 val, val == pfdev->features.tiler_present, 100, 1000);
362 if (ret)
363 dev_err(pfdev->dev, "error powering up gpu tiler");
364 }
365
panfrost_gpu_power_off(struct panfrost_device * pfdev)366 void panfrost_gpu_power_off(struct panfrost_device *pfdev)
367 {
368 gpu_write(pfdev, TILER_PWROFF_LO, 0);
369 gpu_write(pfdev, SHADER_PWROFF_LO, 0);
370 gpu_write(pfdev, L2_PWROFF_LO, 0);
371 }
372
panfrost_gpu_init(struct panfrost_device * pfdev)373 int panfrost_gpu_init(struct panfrost_device *pfdev)
374 {
375 int err, irq;
376
377 err = panfrost_gpu_soft_reset(pfdev);
378 if (err)
379 return err;
380
381 panfrost_gpu_init_features(pfdev);
382
383 err = dma_set_mask_and_coherent(pfdev->dev,
384 DMA_BIT_MASK(FIELD_GET(0xff00, pfdev->features.mmu_features)));
385 if (err)
386 return err;
387
388 dma_set_max_seg_size(pfdev->dev, UINT_MAX);
389
390 irq = platform_get_irq_byname(to_platform_device(pfdev->dev), "gpu");
391 if (irq <= 0)
392 return -ENODEV;
393
394 err = devm_request_irq(pfdev->dev, irq, panfrost_gpu_irq_handler,
395 IRQF_SHARED, KBUILD_MODNAME "-gpu", pfdev);
396 if (err) {
397 dev_err(pfdev->dev, "failed to request gpu irq");
398 return err;
399 }
400
401 panfrost_gpu_power_on(pfdev);
402
403 return 0;
404 }
405
panfrost_gpu_fini(struct panfrost_device * pfdev)406 void panfrost_gpu_fini(struct panfrost_device *pfdev)
407 {
408 panfrost_gpu_power_off(pfdev);
409 }
410
panfrost_gpu_get_latest_flush_id(struct panfrost_device * pfdev)411 u32 panfrost_gpu_get_latest_flush_id(struct panfrost_device *pfdev)
412 {
413 u32 flush_id;
414
415 if (panfrost_has_hw_feature(pfdev, HW_FEATURE_FLUSH_REDUCTION)) {
416 /* Flush reduction only makes sense when the GPU is kept powered on between jobs */
417 if (pm_runtime_get_if_in_use(pfdev->dev)) {
418 flush_id = gpu_read(pfdev, GPU_LATEST_FLUSH_ID);
419 pm_runtime_put(pfdev->dev);
420 return flush_id;
421 }
422 }
423
424 return 0;
425 }
426