2 * Copyright © 2012 Intel Corporation
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 (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Ben Widawsky <ben@bwidawsk.net>
28 #include <linux/device.h>
29 #include <linux/module.h>
30 #include <linux/stat.h>
31 #include <linux/sysfs.h>
34 #include "i915_sysfs.h"
36 #include "intel_sideband.h"
38 static inline struct drm_i915_private
*kdev_minor_to_i915(struct device
*kdev
)
40 struct drm_minor
*minor
= dev_get_drvdata(kdev
);
41 return to_i915(minor
->dev
);
45 static u32
calc_residency(struct drm_i915_private
*dev_priv
,
48 intel_wakeref_t wakeref
;
51 with_intel_runtime_pm(&dev_priv
->runtime_pm
, wakeref
)
52 res
= intel_rc6_residency_us(dev_priv
, reg
);
54 return DIV_ROUND_CLOSEST_ULL(res
, 1000);
58 show_rc6_mask(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
60 struct drm_i915_private
*dev_priv
= kdev_minor_to_i915(kdev
);
64 if (HAS_RC6(dev_priv
))
66 if (HAS_RC6p(dev_priv
))
68 if (HAS_RC6pp(dev_priv
))
71 return snprintf(buf
, PAGE_SIZE
, "%x\n", mask
);
75 show_rc6_ms(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
77 struct drm_i915_private
*dev_priv
= kdev_minor_to_i915(kdev
);
78 u32 rc6_residency
= calc_residency(dev_priv
, GEN6_GT_GFX_RC6
);
79 return snprintf(buf
, PAGE_SIZE
, "%u\n", rc6_residency
);
83 show_rc6p_ms(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
85 struct drm_i915_private
*dev_priv
= kdev_minor_to_i915(kdev
);
86 u32 rc6p_residency
= calc_residency(dev_priv
, GEN6_GT_GFX_RC6p
);
87 return snprintf(buf
, PAGE_SIZE
, "%u\n", rc6p_residency
);
91 show_rc6pp_ms(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
93 struct drm_i915_private
*dev_priv
= kdev_minor_to_i915(kdev
);
94 u32 rc6pp_residency
= calc_residency(dev_priv
, GEN6_GT_GFX_RC6pp
);
95 return snprintf(buf
, PAGE_SIZE
, "%u\n", rc6pp_residency
);
99 show_media_rc6_ms(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
101 struct drm_i915_private
*dev_priv
= kdev_minor_to_i915(kdev
);
102 u32 rc6_residency
= calc_residency(dev_priv
, VLV_GT_MEDIA_RC6
);
103 return snprintf(buf
, PAGE_SIZE
, "%u\n", rc6_residency
);
106 static DEVICE_ATTR(rc6_enable
, S_IRUGO
, show_rc6_mask
, NULL
);
107 static DEVICE_ATTR(rc6_residency_ms
, S_IRUGO
, show_rc6_ms
, NULL
);
108 static DEVICE_ATTR(rc6p_residency_ms
, S_IRUGO
, show_rc6p_ms
, NULL
);
109 static DEVICE_ATTR(rc6pp_residency_ms
, S_IRUGO
, show_rc6pp_ms
, NULL
);
110 static DEVICE_ATTR(media_rc6_residency_ms
, S_IRUGO
, show_media_rc6_ms
, NULL
);
112 static struct attribute
*rc6_attrs
[] = {
113 &dev_attr_rc6_enable
.attr
,
114 &dev_attr_rc6_residency_ms
.attr
,
118 static const struct attribute_group rc6_attr_group
= {
119 .name
= power_group_name
,
123 static struct attribute
*rc6p_attrs
[] = {
124 &dev_attr_rc6p_residency_ms
.attr
,
125 &dev_attr_rc6pp_residency_ms
.attr
,
129 static const struct attribute_group rc6p_attr_group
= {
130 .name
= power_group_name
,
134 static struct attribute
*media_rc6_attrs
[] = {
135 &dev_attr_media_rc6_residency_ms
.attr
,
139 static const struct attribute_group media_rc6_attr_group
= {
140 .name
= power_group_name
,
141 .attrs
= media_rc6_attrs
145 static int l3_access_valid(struct drm_i915_private
*dev_priv
, loff_t offset
)
147 if (!HAS_L3_DPF(dev_priv
))
153 if (offset
>= GEN7_L3LOG_SIZE
)
160 i915_l3_read(struct file
*filp
, struct kobject
*kobj
,
161 struct bin_attribute
*attr
, char *buf
,
162 loff_t offset
, size_t count
)
164 struct device
*kdev
= kobj_to_dev(kobj
);
165 struct drm_i915_private
*dev_priv
= kdev_minor_to_i915(kdev
);
166 struct drm_device
*dev
= &dev_priv
->drm
;
167 int slice
= (int)(uintptr_t)attr
->private;
170 count
= round_down(count
, 4);
172 ret
= l3_access_valid(dev_priv
, offset
);
176 count
= min_t(size_t, GEN7_L3LOG_SIZE
- offset
, count
);
178 ret
= i915_mutex_lock_interruptible(dev
);
182 if (dev_priv
->l3_parity
.remap_info
[slice
])
184 dev_priv
->l3_parity
.remap_info
[slice
] + (offset
/4),
187 memset(buf
, 0, count
);
189 mutex_unlock(&dev
->struct_mutex
);
195 i915_l3_write(struct file
*filp
, struct kobject
*kobj
,
196 struct bin_attribute
*attr
, char *buf
,
197 loff_t offset
, size_t count
)
199 struct device
*kdev
= kobj_to_dev(kobj
);
200 struct drm_i915_private
*dev_priv
= kdev_minor_to_i915(kdev
);
201 struct drm_device
*dev
= &dev_priv
->drm
;
202 struct i915_gem_context
*ctx
;
203 int slice
= (int)(uintptr_t)attr
->private;
207 ret
= l3_access_valid(dev_priv
, offset
);
211 ret
= i915_mutex_lock_interruptible(dev
);
215 remap_info
= &dev_priv
->l3_parity
.remap_info
[slice
];
217 *remap_info
= kzalloc(GEN7_L3LOG_SIZE
, GFP_KERNEL
);
224 /* TODO: Ideally we really want a GPU reset here to make sure errors
225 * aren't propagated. Since I cannot find a stable way to reset the GPU
226 * at this point it is left as a TODO.
228 memcpy(*remap_info
+ (offset
/4), buf
, count
);
230 /* NB: We defer the remapping until we switch to the context */
231 list_for_each_entry(ctx
, &dev_priv
->contexts
.list
, link
)
232 ctx
->remap_slice
|= (1<<slice
);
237 mutex_unlock(&dev
->struct_mutex
);
242 static const struct bin_attribute dpf_attrs
= {
243 .attr
= {.name
= "l3_parity", .mode
= (S_IRUSR
| S_IWUSR
)},
244 .size
= GEN7_L3LOG_SIZE
,
245 .read
= i915_l3_read
,
246 .write
= i915_l3_write
,
251 static const struct bin_attribute dpf_attrs_1
= {
252 .attr
= {.name
= "l3_parity_slice_1", .mode
= (S_IRUSR
| S_IWUSR
)},
253 .size
= GEN7_L3LOG_SIZE
,
254 .read
= i915_l3_read
,
255 .write
= i915_l3_write
,
260 static ssize_t
gt_act_freq_mhz_show(struct device
*kdev
,
261 struct device_attribute
*attr
, char *buf
)
263 struct drm_i915_private
*dev_priv
= kdev_minor_to_i915(kdev
);
264 intel_wakeref_t wakeref
;
267 wakeref
= intel_runtime_pm_get(&dev_priv
->runtime_pm
);
269 if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
)) {
270 vlv_punit_get(dev_priv
);
271 freq
= vlv_punit_read(dev_priv
, PUNIT_REG_GPU_FREQ_STS
);
272 vlv_punit_put(dev_priv
);
274 freq
= (freq
>> 8) & 0xff;
276 freq
= intel_get_cagf(dev_priv
, I915_READ(GEN6_RPSTAT1
));
279 intel_runtime_pm_put(&dev_priv
->runtime_pm
, wakeref
);
281 return snprintf(buf
, PAGE_SIZE
, "%d\n", intel_gpu_freq(dev_priv
, freq
));
284 static ssize_t
gt_cur_freq_mhz_show(struct device
*kdev
,
285 struct device_attribute
*attr
, char *buf
)
287 struct drm_i915_private
*dev_priv
= kdev_minor_to_i915(kdev
);
289 return snprintf(buf
, PAGE_SIZE
, "%d\n",
290 intel_gpu_freq(dev_priv
,
291 dev_priv
->gt_pm
.rps
.cur_freq
));
294 static ssize_t
gt_boost_freq_mhz_show(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
296 struct drm_i915_private
*dev_priv
= kdev_minor_to_i915(kdev
);
298 return snprintf(buf
, PAGE_SIZE
, "%d\n",
299 intel_gpu_freq(dev_priv
,
300 dev_priv
->gt_pm
.rps
.boost_freq
));
303 static ssize_t
gt_boost_freq_mhz_store(struct device
*kdev
,
304 struct device_attribute
*attr
,
305 const char *buf
, size_t count
)
307 struct drm_i915_private
*dev_priv
= kdev_minor_to_i915(kdev
);
308 struct intel_rps
*rps
= &dev_priv
->gt_pm
.rps
;
313 ret
= kstrtou32(buf
, 0, &val
);
317 /* Validate against (static) hardware limits */
318 val
= intel_freq_opcode(dev_priv
, val
);
319 if (val
< rps
->min_freq
|| val
> rps
->max_freq
)
322 mutex_lock(&rps
->lock
);
323 if (val
!= rps
->boost_freq
) {
324 rps
->boost_freq
= val
;
325 boost
= atomic_read(&rps
->num_waiters
);
327 mutex_unlock(&rps
->lock
);
329 schedule_work(&rps
->work
);
334 static ssize_t
vlv_rpe_freq_mhz_show(struct device
*kdev
,
335 struct device_attribute
*attr
, char *buf
)
337 struct drm_i915_private
*dev_priv
= kdev_minor_to_i915(kdev
);
339 return snprintf(buf
, PAGE_SIZE
, "%d\n",
340 intel_gpu_freq(dev_priv
,
341 dev_priv
->gt_pm
.rps
.efficient_freq
));
344 static ssize_t
gt_max_freq_mhz_show(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
346 struct drm_i915_private
*dev_priv
= kdev_minor_to_i915(kdev
);
348 return snprintf(buf
, PAGE_SIZE
, "%d\n",
349 intel_gpu_freq(dev_priv
,
350 dev_priv
->gt_pm
.rps
.max_freq_softlimit
));
353 static ssize_t
gt_max_freq_mhz_store(struct device
*kdev
,
354 struct device_attribute
*attr
,
355 const char *buf
, size_t count
)
357 struct drm_i915_private
*dev_priv
= kdev_minor_to_i915(kdev
);
358 struct intel_rps
*rps
= &dev_priv
->gt_pm
.rps
;
359 intel_wakeref_t wakeref
;
363 ret
= kstrtou32(buf
, 0, &val
);
367 wakeref
= intel_runtime_pm_get(&dev_priv
->runtime_pm
);
368 mutex_lock(&rps
->lock
);
370 val
= intel_freq_opcode(dev_priv
, val
);
371 if (val
< rps
->min_freq
||
372 val
> rps
->max_freq
||
373 val
< rps
->min_freq_softlimit
) {
378 if (val
> rps
->rp0_freq
)
379 DRM_DEBUG("User requested overclocking to %d\n",
380 intel_gpu_freq(dev_priv
, val
));
382 rps
->max_freq_softlimit
= val
;
384 val
= clamp_t(int, rps
->cur_freq
,
385 rps
->min_freq_softlimit
,
386 rps
->max_freq_softlimit
);
388 /* We still need *_set_rps to process the new max_delay and
389 * update the interrupt limits and PMINTRMSK even though
390 * frequency request may be unchanged. */
391 ret
= intel_set_rps(dev_priv
, val
);
394 mutex_unlock(&rps
->lock
);
395 intel_runtime_pm_put(&dev_priv
->runtime_pm
, wakeref
);
400 static ssize_t
gt_min_freq_mhz_show(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
402 struct drm_i915_private
*dev_priv
= kdev_minor_to_i915(kdev
);
404 return snprintf(buf
, PAGE_SIZE
, "%d\n",
405 intel_gpu_freq(dev_priv
,
406 dev_priv
->gt_pm
.rps
.min_freq_softlimit
));
409 static ssize_t
gt_min_freq_mhz_store(struct device
*kdev
,
410 struct device_attribute
*attr
,
411 const char *buf
, size_t count
)
413 struct drm_i915_private
*dev_priv
= kdev_minor_to_i915(kdev
);
414 struct intel_rps
*rps
= &dev_priv
->gt_pm
.rps
;
415 intel_wakeref_t wakeref
;
419 ret
= kstrtou32(buf
, 0, &val
);
423 wakeref
= intel_runtime_pm_get(&dev_priv
->runtime_pm
);
424 mutex_lock(&rps
->lock
);
426 val
= intel_freq_opcode(dev_priv
, val
);
427 if (val
< rps
->min_freq
||
428 val
> rps
->max_freq
||
429 val
> rps
->max_freq_softlimit
) {
434 rps
->min_freq_softlimit
= val
;
436 val
= clamp_t(int, rps
->cur_freq
,
437 rps
->min_freq_softlimit
,
438 rps
->max_freq_softlimit
);
440 /* We still need *_set_rps to process the new min_delay and
441 * update the interrupt limits and PMINTRMSK even though
442 * frequency request may be unchanged. */
443 ret
= intel_set_rps(dev_priv
, val
);
446 mutex_unlock(&rps
->lock
);
447 intel_runtime_pm_put(&dev_priv
->runtime_pm
, wakeref
);
452 static DEVICE_ATTR_RO(gt_act_freq_mhz
);
453 static DEVICE_ATTR_RO(gt_cur_freq_mhz
);
454 static DEVICE_ATTR_RW(gt_boost_freq_mhz
);
455 static DEVICE_ATTR_RW(gt_max_freq_mhz
);
456 static DEVICE_ATTR_RW(gt_min_freq_mhz
);
458 static DEVICE_ATTR_RO(vlv_rpe_freq_mhz
);
460 static ssize_t
gt_rp_mhz_show(struct device
*kdev
, struct device_attribute
*attr
, char *buf
);
461 static DEVICE_ATTR(gt_RP0_freq_mhz
, S_IRUGO
, gt_rp_mhz_show
, NULL
);
462 static DEVICE_ATTR(gt_RP1_freq_mhz
, S_IRUGO
, gt_rp_mhz_show
, NULL
);
463 static DEVICE_ATTR(gt_RPn_freq_mhz
, S_IRUGO
, gt_rp_mhz_show
, NULL
);
465 /* For now we have a static number of RP states */
466 static ssize_t
gt_rp_mhz_show(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
468 struct drm_i915_private
*dev_priv
= kdev_minor_to_i915(kdev
);
469 struct intel_rps
*rps
= &dev_priv
->gt_pm
.rps
;
472 if (attr
== &dev_attr_gt_RP0_freq_mhz
)
473 val
= intel_gpu_freq(dev_priv
, rps
->rp0_freq
);
474 else if (attr
== &dev_attr_gt_RP1_freq_mhz
)
475 val
= intel_gpu_freq(dev_priv
, rps
->rp1_freq
);
476 else if (attr
== &dev_attr_gt_RPn_freq_mhz
)
477 val
= intel_gpu_freq(dev_priv
, rps
->min_freq
);
481 return snprintf(buf
, PAGE_SIZE
, "%d\n", val
);
484 static const struct attribute
* const gen6_attrs
[] = {
485 &dev_attr_gt_act_freq_mhz
.attr
,
486 &dev_attr_gt_cur_freq_mhz
.attr
,
487 &dev_attr_gt_boost_freq_mhz
.attr
,
488 &dev_attr_gt_max_freq_mhz
.attr
,
489 &dev_attr_gt_min_freq_mhz
.attr
,
490 &dev_attr_gt_RP0_freq_mhz
.attr
,
491 &dev_attr_gt_RP1_freq_mhz
.attr
,
492 &dev_attr_gt_RPn_freq_mhz
.attr
,
496 static const struct attribute
* const vlv_attrs
[] = {
497 &dev_attr_gt_act_freq_mhz
.attr
,
498 &dev_attr_gt_cur_freq_mhz
.attr
,
499 &dev_attr_gt_boost_freq_mhz
.attr
,
500 &dev_attr_gt_max_freq_mhz
.attr
,
501 &dev_attr_gt_min_freq_mhz
.attr
,
502 &dev_attr_gt_RP0_freq_mhz
.attr
,
503 &dev_attr_gt_RP1_freq_mhz
.attr
,
504 &dev_attr_gt_RPn_freq_mhz
.attr
,
505 &dev_attr_vlv_rpe_freq_mhz
.attr
,
509 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
511 static ssize_t
error_state_read(struct file
*filp
, struct kobject
*kobj
,
512 struct bin_attribute
*attr
, char *buf
,
513 loff_t off
, size_t count
)
516 struct device
*kdev
= kobj_to_dev(kobj
);
517 struct drm_i915_private
*i915
= kdev_minor_to_i915(kdev
);
518 struct i915_gpu_state
*gpu
;
521 gpu
= i915_first_error_state(i915
);
525 ret
= i915_gpu_state_copy_to_buffer(gpu
, buf
, off
, count
);
526 i915_gpu_state_put(gpu
);
528 const char *str
= "No error state collected\n";
529 size_t len
= strlen(str
);
531 ret
= min_t(size_t, count
, len
- off
);
532 memcpy(buf
, str
+ off
, ret
);
538 static ssize_t
error_state_write(struct file
*file
, struct kobject
*kobj
,
539 struct bin_attribute
*attr
, char *buf
,
540 loff_t off
, size_t count
)
542 struct device
*kdev
= kobj_to_dev(kobj
);
543 struct drm_i915_private
*dev_priv
= kdev_minor_to_i915(kdev
);
545 DRM_DEBUG_DRIVER("Resetting error state\n");
546 i915_reset_error_state(dev_priv
);
551 static const struct bin_attribute error_state_attr
= {
552 .attr
.name
= "error",
553 .attr
.mode
= S_IRUSR
| S_IWUSR
,
555 .read
= error_state_read
,
556 .write
= error_state_write
,
559 static void i915_setup_error_capture(struct device
*kdev
)
561 if (sysfs_create_bin_file(&kdev
->kobj
, &error_state_attr
))
562 DRM_ERROR("error_state sysfs setup failed\n");
565 static void i915_teardown_error_capture(struct device
*kdev
)
567 sysfs_remove_bin_file(&kdev
->kobj
, &error_state_attr
);
570 static void i915_setup_error_capture(struct device
*kdev
) {}
571 static void i915_teardown_error_capture(struct device
*kdev
) {}
574 void i915_setup_sysfs(struct drm_i915_private
*dev_priv
)
576 struct device
*kdev
= dev_priv
->drm
.primary
->kdev
;
580 if (HAS_RC6(dev_priv
)) {
581 ret
= sysfs_merge_group(&kdev
->kobj
,
584 DRM_ERROR("RC6 residency sysfs setup failed\n");
586 if (HAS_RC6p(dev_priv
)) {
587 ret
= sysfs_merge_group(&kdev
->kobj
,
590 DRM_ERROR("RC6p residency sysfs setup failed\n");
592 if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
)) {
593 ret
= sysfs_merge_group(&kdev
->kobj
,
594 &media_rc6_attr_group
);
596 DRM_ERROR("Media RC6 residency sysfs setup failed\n");
599 if (HAS_L3_DPF(dev_priv
)) {
600 ret
= device_create_bin_file(kdev
, &dpf_attrs
);
602 DRM_ERROR("l3 parity sysfs setup failed\n");
604 if (NUM_L3_SLICES(dev_priv
) > 1) {
605 ret
= device_create_bin_file(kdev
,
608 DRM_ERROR("l3 parity slice 1 setup failed\n");
613 if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
))
614 ret
= sysfs_create_files(&kdev
->kobj
, vlv_attrs
);
615 else if (INTEL_GEN(dev_priv
) >= 6)
616 ret
= sysfs_create_files(&kdev
->kobj
, gen6_attrs
);
618 DRM_ERROR("RPS sysfs setup failed\n");
620 i915_setup_error_capture(kdev
);
623 void i915_teardown_sysfs(struct drm_i915_private
*dev_priv
)
625 struct device
*kdev
= dev_priv
->drm
.primary
->kdev
;
627 i915_teardown_error_capture(kdev
);
629 if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
))
630 sysfs_remove_files(&kdev
->kobj
, vlv_attrs
);
632 sysfs_remove_files(&kdev
->kobj
, gen6_attrs
);
633 device_remove_bin_file(kdev
, &dpf_attrs_1
);
634 device_remove_bin_file(kdev
, &dpf_attrs
);
636 sysfs_unmerge_group(&kdev
->kobj
, &rc6_attr_group
);
637 sysfs_unmerge_group(&kdev
->kobj
, &rc6p_attr_group
);