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>
32 #include "intel_drv.h"
35 #define dev_to_drm_minor(d) dev_get_drvdata((d))
38 static u32
calc_residency(struct drm_device
*dev
, const u32 reg
)
40 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
41 u64 raw_time
; /* 32b value may overflow during fixed point math */
42 u64 units
= 128ULL, div
= 100000ULL, bias
= 100ULL;
45 if (!intel_enable_rc6(dev
))
48 intel_runtime_pm_get(dev_priv
);
50 /* On VLV, residency time is in CZ units rather than 1.28us */
51 if (IS_VALLEYVIEW(dev
)) {
54 clkctl2
= I915_READ(VLV_CLK_CTL2
) >>
55 CLK_CTL2_CZCOUNT_30NS_SHIFT
;
57 WARN(!clkctl2
, "bogus CZ count value");
61 units
= DIV_ROUND_UP_ULL(30ULL * bias
, (u64
)clkctl2
);
62 if (I915_READ(VLV_COUNTER_CONTROL
) & VLV_COUNT_RANGE_HIGH
)
65 div
= 1000000ULL * bias
;
68 raw_time
= I915_READ(reg
) * units
;
69 ret
= DIV_ROUND_UP_ULL(raw_time
, div
);
72 intel_runtime_pm_put(dev_priv
);
77 show_rc6_mask(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
79 struct drm_minor
*dminor
= dev_to_drm_minor(kdev
);
80 return snprintf(buf
, PAGE_SIZE
, "%x\n", intel_enable_rc6(dminor
->dev
));
84 show_rc6_ms(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
86 struct drm_minor
*dminor
= dev_get_drvdata(kdev
);
87 u32 rc6_residency
= calc_residency(dminor
->dev
, GEN6_GT_GFX_RC6
);
88 return snprintf(buf
, PAGE_SIZE
, "%u\n", rc6_residency
);
92 show_rc6p_ms(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
94 struct drm_minor
*dminor
= dev_to_drm_minor(kdev
);
95 u32 rc6p_residency
= calc_residency(dminor
->dev
, GEN6_GT_GFX_RC6p
);
96 if (IS_VALLEYVIEW(dminor
->dev
))
98 return snprintf(buf
, PAGE_SIZE
, "%u\n", rc6p_residency
);
102 show_rc6pp_ms(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
104 struct drm_minor
*dminor
= dev_to_drm_minor(kdev
);
105 u32 rc6pp_residency
= calc_residency(dminor
->dev
, GEN6_GT_GFX_RC6pp
);
106 if (IS_VALLEYVIEW(dminor
->dev
))
108 return snprintf(buf
, PAGE_SIZE
, "%u\n", rc6pp_residency
);
111 static DEVICE_ATTR(rc6_enable
, S_IRUGO
, show_rc6_mask
, NULL
);
112 static DEVICE_ATTR(rc6_residency_ms
, S_IRUGO
, show_rc6_ms
, NULL
);
113 static DEVICE_ATTR(rc6p_residency_ms
, S_IRUGO
, show_rc6p_ms
, NULL
);
114 static DEVICE_ATTR(rc6pp_residency_ms
, S_IRUGO
, show_rc6pp_ms
, NULL
);
116 static struct attribute
*rc6_attrs
[] = {
117 &dev_attr_rc6_enable
.attr
,
118 &dev_attr_rc6_residency_ms
.attr
,
119 &dev_attr_rc6p_residency_ms
.attr
,
120 &dev_attr_rc6pp_residency_ms
.attr
,
124 static struct attribute_group rc6_attr_group
= {
125 .name
= power_group_name
,
130 static int l3_access_valid(struct drm_device
*dev
, loff_t offset
)
132 if (!HAS_L3_DPF(dev
))
138 if (offset
>= GEN7_L3LOG_SIZE
)
145 i915_l3_read(struct file
*filp
, struct kobject
*kobj
,
146 struct bin_attribute
*attr
, char *buf
,
147 loff_t offset
, size_t count
)
149 struct device
*dev
= container_of(kobj
, struct device
, kobj
);
150 struct drm_minor
*dminor
= dev_to_drm_minor(dev
);
151 struct drm_device
*drm_dev
= dminor
->dev
;
152 struct drm_i915_private
*dev_priv
= drm_dev
->dev_private
;
153 int slice
= (int)(uintptr_t)attr
->private;
156 count
= round_down(count
, 4);
158 ret
= l3_access_valid(drm_dev
, offset
);
162 count
= min_t(size_t, GEN7_L3LOG_SIZE
- offset
, count
);
164 ret
= i915_mutex_lock_interruptible(drm_dev
);
168 if (dev_priv
->l3_parity
.remap_info
[slice
])
170 dev_priv
->l3_parity
.remap_info
[slice
] + (offset
/4),
173 memset(buf
, 0, count
);
175 mutex_unlock(&drm_dev
->struct_mutex
);
181 i915_l3_write(struct file
*filp
, struct kobject
*kobj
,
182 struct bin_attribute
*attr
, char *buf
,
183 loff_t offset
, size_t count
)
185 struct device
*dev
= container_of(kobj
, struct device
, kobj
);
186 struct drm_minor
*dminor
= dev_to_drm_minor(dev
);
187 struct drm_device
*drm_dev
= dminor
->dev
;
188 struct drm_i915_private
*dev_priv
= drm_dev
->dev_private
;
189 struct i915_hw_context
*ctx
;
190 u32
*temp
= NULL
; /* Just here to make handling failures easy */
191 int slice
= (int)(uintptr_t)attr
->private;
194 if (!HAS_HW_CONTEXTS(drm_dev
))
197 ret
= l3_access_valid(drm_dev
, offset
);
201 ret
= i915_mutex_lock_interruptible(drm_dev
);
205 if (!dev_priv
->l3_parity
.remap_info
[slice
]) {
206 temp
= kzalloc(GEN7_L3LOG_SIZE
, GFP_KERNEL
);
208 mutex_unlock(&drm_dev
->struct_mutex
);
213 ret
= i915_gpu_idle(drm_dev
);
216 mutex_unlock(&drm_dev
->struct_mutex
);
220 /* TODO: Ideally we really want a GPU reset here to make sure errors
221 * aren't propagated. Since I cannot find a stable way to reset the GPU
222 * at this point it is left as a TODO.
225 dev_priv
->l3_parity
.remap_info
[slice
] = temp
;
227 memcpy(dev_priv
->l3_parity
.remap_info
[slice
] + (offset
/4), buf
, count
);
229 /* NB: We defer the remapping until we switch to the context */
230 list_for_each_entry(ctx
, &dev_priv
->context_list
, link
)
231 ctx
->remap_slice
|= (1<<slice
);
233 mutex_unlock(&drm_dev
->struct_mutex
);
238 static struct bin_attribute dpf_attrs
= {
239 .attr
= {.name
= "l3_parity", .mode
= (S_IRUSR
| S_IWUSR
)},
240 .size
= GEN7_L3LOG_SIZE
,
241 .read
= i915_l3_read
,
242 .write
= i915_l3_write
,
247 static struct bin_attribute dpf_attrs_1
= {
248 .attr
= {.name
= "l3_parity_slice_1", .mode
= (S_IRUSR
| S_IWUSR
)},
249 .size
= GEN7_L3LOG_SIZE
,
250 .read
= i915_l3_read
,
251 .write
= i915_l3_write
,
256 static ssize_t
gt_cur_freq_mhz_show(struct device
*kdev
,
257 struct device_attribute
*attr
, char *buf
)
259 struct drm_minor
*minor
= dev_to_drm_minor(kdev
);
260 struct drm_device
*dev
= minor
->dev
;
261 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
264 flush_delayed_work(&dev_priv
->rps
.delayed_resume_work
);
266 mutex_lock(&dev_priv
->rps
.hw_lock
);
267 if (IS_VALLEYVIEW(dev_priv
->dev
)) {
269 freq
= vlv_punit_read(dev_priv
, PUNIT_REG_GPU_FREQ_STS
);
270 ret
= vlv_gpu_freq(dev_priv
, (freq
>> 8) & 0xff);
272 ret
= dev_priv
->rps
.cur_freq
* GT_FREQUENCY_MULTIPLIER
;
274 mutex_unlock(&dev_priv
->rps
.hw_lock
);
276 return snprintf(buf
, PAGE_SIZE
, "%d\n", ret
);
279 static ssize_t
vlv_rpe_freq_mhz_show(struct device
*kdev
,
280 struct device_attribute
*attr
, char *buf
)
282 struct drm_minor
*minor
= dev_to_drm_minor(kdev
);
283 struct drm_device
*dev
= minor
->dev
;
284 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
286 return snprintf(buf
, PAGE_SIZE
, "%d\n",
287 vlv_gpu_freq(dev_priv
, dev_priv
->rps
.efficient_freq
));
290 static ssize_t
gt_max_freq_mhz_show(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
292 struct drm_minor
*minor
= dev_to_drm_minor(kdev
);
293 struct drm_device
*dev
= minor
->dev
;
294 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
297 flush_delayed_work(&dev_priv
->rps
.delayed_resume_work
);
299 mutex_lock(&dev_priv
->rps
.hw_lock
);
300 if (IS_VALLEYVIEW(dev_priv
->dev
))
301 ret
= vlv_gpu_freq(dev_priv
, dev_priv
->rps
.max_freq_softlimit
);
303 ret
= dev_priv
->rps
.max_freq_softlimit
* GT_FREQUENCY_MULTIPLIER
;
304 mutex_unlock(&dev_priv
->rps
.hw_lock
);
306 return snprintf(buf
, PAGE_SIZE
, "%d\n", ret
);
309 static ssize_t
gt_max_freq_mhz_store(struct device
*kdev
,
310 struct device_attribute
*attr
,
311 const char *buf
, size_t count
)
313 struct drm_minor
*minor
= dev_to_drm_minor(kdev
);
314 struct drm_device
*dev
= minor
->dev
;
315 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
319 ret
= kstrtou32(buf
, 0, &val
);
323 flush_delayed_work(&dev_priv
->rps
.delayed_resume_work
);
325 mutex_lock(&dev_priv
->rps
.hw_lock
);
327 if (IS_VALLEYVIEW(dev_priv
->dev
))
328 val
= vlv_freq_opcode(dev_priv
, val
);
330 val
/= GT_FREQUENCY_MULTIPLIER
;
332 if (val
< dev_priv
->rps
.min_freq
||
333 val
> dev_priv
->rps
.max_freq
||
334 val
< dev_priv
->rps
.min_freq_softlimit
) {
335 mutex_unlock(&dev_priv
->rps
.hw_lock
);
339 if (val
> dev_priv
->rps
.rp0_freq
)
340 DRM_DEBUG("User requested overclocking to %d\n",
341 val
* GT_FREQUENCY_MULTIPLIER
);
343 dev_priv
->rps
.max_freq_softlimit
= val
;
345 if (dev_priv
->rps
.cur_freq
> val
) {
346 if (IS_VALLEYVIEW(dev
))
347 valleyview_set_rps(dev
, val
);
349 gen6_set_rps(dev
, val
);
350 } else if (!IS_VALLEYVIEW(dev
)) {
351 /* We still need gen6_set_rps to process the new max_delay and
352 * update the interrupt limits even though frequency request is
354 gen6_set_rps(dev
, dev_priv
->rps
.cur_freq
);
357 mutex_unlock(&dev_priv
->rps
.hw_lock
);
362 static ssize_t
gt_min_freq_mhz_show(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
364 struct drm_minor
*minor
= dev_to_drm_minor(kdev
);
365 struct drm_device
*dev
= minor
->dev
;
366 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
369 flush_delayed_work(&dev_priv
->rps
.delayed_resume_work
);
371 mutex_lock(&dev_priv
->rps
.hw_lock
);
372 if (IS_VALLEYVIEW(dev_priv
->dev
))
373 ret
= vlv_gpu_freq(dev_priv
, dev_priv
->rps
.min_freq_softlimit
);
375 ret
= dev_priv
->rps
.min_freq_softlimit
* GT_FREQUENCY_MULTIPLIER
;
376 mutex_unlock(&dev_priv
->rps
.hw_lock
);
378 return snprintf(buf
, PAGE_SIZE
, "%d\n", ret
);
381 static ssize_t
gt_min_freq_mhz_store(struct device
*kdev
,
382 struct device_attribute
*attr
,
383 const char *buf
, size_t count
)
385 struct drm_minor
*minor
= dev_to_drm_minor(kdev
);
386 struct drm_device
*dev
= minor
->dev
;
387 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
391 ret
= kstrtou32(buf
, 0, &val
);
395 flush_delayed_work(&dev_priv
->rps
.delayed_resume_work
);
397 mutex_lock(&dev_priv
->rps
.hw_lock
);
399 if (IS_VALLEYVIEW(dev
))
400 val
= vlv_freq_opcode(dev_priv
, val
);
402 val
/= GT_FREQUENCY_MULTIPLIER
;
404 if (val
< dev_priv
->rps
.min_freq
||
405 val
> dev_priv
->rps
.max_freq
||
406 val
> dev_priv
->rps
.max_freq_softlimit
) {
407 mutex_unlock(&dev_priv
->rps
.hw_lock
);
411 dev_priv
->rps
.min_freq_softlimit
= val
;
413 if (dev_priv
->rps
.cur_freq
< val
) {
414 if (IS_VALLEYVIEW(dev
))
415 valleyview_set_rps(dev
, val
);
417 gen6_set_rps(dev
, val
);
418 } else if (!IS_VALLEYVIEW(dev
)) {
419 /* We still need gen6_set_rps to process the new min_delay and
420 * update the interrupt limits even though frequency request is
422 gen6_set_rps(dev
, dev_priv
->rps
.cur_freq
);
425 mutex_unlock(&dev_priv
->rps
.hw_lock
);
431 static DEVICE_ATTR(gt_cur_freq_mhz
, S_IRUGO
, gt_cur_freq_mhz_show
, NULL
);
432 static DEVICE_ATTR(gt_max_freq_mhz
, S_IRUGO
| S_IWUSR
, gt_max_freq_mhz_show
, gt_max_freq_mhz_store
);
433 static DEVICE_ATTR(gt_min_freq_mhz
, S_IRUGO
| S_IWUSR
, gt_min_freq_mhz_show
, gt_min_freq_mhz_store
);
435 static DEVICE_ATTR(vlv_rpe_freq_mhz
, S_IRUGO
, vlv_rpe_freq_mhz_show
, NULL
);
437 static ssize_t
gt_rp_mhz_show(struct device
*kdev
, struct device_attribute
*attr
, char *buf
);
438 static DEVICE_ATTR(gt_RP0_freq_mhz
, S_IRUGO
, gt_rp_mhz_show
, NULL
);
439 static DEVICE_ATTR(gt_RP1_freq_mhz
, S_IRUGO
, gt_rp_mhz_show
, NULL
);
440 static DEVICE_ATTR(gt_RPn_freq_mhz
, S_IRUGO
, gt_rp_mhz_show
, NULL
);
442 /* For now we have a static number of RP states */
443 static ssize_t
gt_rp_mhz_show(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
445 struct drm_minor
*minor
= dev_to_drm_minor(kdev
);
446 struct drm_device
*dev
= minor
->dev
;
447 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
448 u32 val
, rp_state_cap
;
451 ret
= mutex_lock_interruptible(&dev
->struct_mutex
);
454 intel_runtime_pm_get(dev_priv
);
455 rp_state_cap
= I915_READ(GEN6_RP_STATE_CAP
);
456 intel_runtime_pm_put(dev_priv
);
457 mutex_unlock(&dev
->struct_mutex
);
459 if (attr
== &dev_attr_gt_RP0_freq_mhz
) {
460 val
= ((rp_state_cap
& 0x0000ff) >> 0) * GT_FREQUENCY_MULTIPLIER
;
461 } else if (attr
== &dev_attr_gt_RP1_freq_mhz
) {
462 val
= ((rp_state_cap
& 0x00ff00) >> 8) * GT_FREQUENCY_MULTIPLIER
;
463 } else if (attr
== &dev_attr_gt_RPn_freq_mhz
) {
464 val
= ((rp_state_cap
& 0xff0000) >> 16) * GT_FREQUENCY_MULTIPLIER
;
468 return snprintf(buf
, PAGE_SIZE
, "%d\n", val
);
471 static const struct attribute
*gen6_attrs
[] = {
472 &dev_attr_gt_cur_freq_mhz
.attr
,
473 &dev_attr_gt_max_freq_mhz
.attr
,
474 &dev_attr_gt_min_freq_mhz
.attr
,
475 &dev_attr_gt_RP0_freq_mhz
.attr
,
476 &dev_attr_gt_RP1_freq_mhz
.attr
,
477 &dev_attr_gt_RPn_freq_mhz
.attr
,
481 static const struct attribute
*vlv_attrs
[] = {
482 &dev_attr_gt_cur_freq_mhz
.attr
,
483 &dev_attr_gt_max_freq_mhz
.attr
,
484 &dev_attr_gt_min_freq_mhz
.attr
,
485 &dev_attr_vlv_rpe_freq_mhz
.attr
,
489 static ssize_t
error_state_read(struct file
*filp
, struct kobject
*kobj
,
490 struct bin_attribute
*attr
, char *buf
,
491 loff_t off
, size_t count
)
494 struct device
*kdev
= container_of(kobj
, struct device
, kobj
);
495 struct drm_minor
*minor
= dev_to_drm_minor(kdev
);
496 struct drm_device
*dev
= minor
->dev
;
497 struct i915_error_state_file_priv error_priv
;
498 struct drm_i915_error_state_buf error_str
;
499 ssize_t ret_count
= 0;
502 memset(&error_priv
, 0, sizeof(error_priv
));
504 ret
= i915_error_state_buf_init(&error_str
, count
, off
);
508 error_priv
.dev
= dev
;
509 i915_error_state_get(dev
, &error_priv
);
511 ret
= i915_error_state_to_str(&error_str
, &error_priv
);
515 ret_count
= count
< error_str
.bytes
? count
: error_str
.bytes
;
517 memcpy(buf
, error_str
.buf
, ret_count
);
519 i915_error_state_put(&error_priv
);
520 i915_error_state_buf_release(&error_str
);
522 return ret
?: ret_count
;
525 static ssize_t
error_state_write(struct file
*file
, struct kobject
*kobj
,
526 struct bin_attribute
*attr
, char *buf
,
527 loff_t off
, size_t count
)
529 struct device
*kdev
= container_of(kobj
, struct device
, kobj
);
530 struct drm_minor
*minor
= dev_to_drm_minor(kdev
);
531 struct drm_device
*dev
= minor
->dev
;
534 DRM_DEBUG_DRIVER("Resetting error state\n");
536 ret
= mutex_lock_interruptible(&dev
->struct_mutex
);
540 i915_destroy_error_state(dev
);
541 mutex_unlock(&dev
->struct_mutex
);
546 static struct bin_attribute error_state_attr
= {
547 .attr
.name
= "error",
548 .attr
.mode
= S_IRUSR
| S_IWUSR
,
550 .read
= error_state_read
,
551 .write
= error_state_write
,
554 void i915_setup_sysfs(struct drm_device
*dev
)
559 if (INTEL_INFO(dev
)->gen
>= 6) {
560 ret
= sysfs_merge_group(&dev
->primary
->kdev
->kobj
,
563 DRM_ERROR("RC6 residency sysfs setup failed\n");
566 if (HAS_L3_DPF(dev
)) {
567 ret
= device_create_bin_file(dev
->primary
->kdev
, &dpf_attrs
);
569 DRM_ERROR("l3 parity sysfs setup failed\n");
571 if (NUM_L3_SLICES(dev
) > 1) {
572 ret
= device_create_bin_file(dev
->primary
->kdev
,
575 DRM_ERROR("l3 parity slice 1 setup failed\n");
580 if (IS_VALLEYVIEW(dev
))
581 ret
= sysfs_create_files(&dev
->primary
->kdev
->kobj
, vlv_attrs
);
582 else if (INTEL_INFO(dev
)->gen
>= 6)
583 ret
= sysfs_create_files(&dev
->primary
->kdev
->kobj
, gen6_attrs
);
585 DRM_ERROR("RPS sysfs setup failed\n");
587 ret
= sysfs_create_bin_file(&dev
->primary
->kdev
->kobj
,
590 DRM_ERROR("error_state sysfs setup failed\n");
593 void i915_teardown_sysfs(struct drm_device
*dev
)
595 sysfs_remove_bin_file(&dev
->primary
->kdev
->kobj
, &error_state_attr
);
596 if (IS_VALLEYVIEW(dev
))
597 sysfs_remove_files(&dev
->primary
->kdev
->kobj
, vlv_attrs
);
599 sysfs_remove_files(&dev
->primary
->kdev
->kobj
, gen6_attrs
);
600 device_remove_bin_file(dev
->primary
->kdev
, &dpf_attrs_1
);
601 device_remove_bin_file(dev
->primary
->kdev
, &dpf_attrs
);
603 sysfs_unmerge_group(&dev
->primary
->kdev
->kobj
, &rc6_attr_group
);