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"
36 static u32
calc_residency(struct drm_device
*dev
, const u32 reg
)
38 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
39 u64 raw_time
; /* 32b value may overflow during fixed point math */
41 if (!intel_enable_rc6(dev
))
44 raw_time
= I915_READ(reg
) * 128ULL;
45 return DIV_ROUND_UP_ULL(raw_time
, 100000);
49 show_rc6_mask(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
51 struct drm_minor
*dminor
= container_of(kdev
, struct drm_minor
, kdev
);
52 return snprintf(buf
, PAGE_SIZE
, "%x\n", intel_enable_rc6(dminor
->dev
));
56 show_rc6_ms(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
58 struct drm_minor
*dminor
= container_of(kdev
, struct drm_minor
, kdev
);
59 u32 rc6_residency
= calc_residency(dminor
->dev
, GEN6_GT_GFX_RC6
);
60 return snprintf(buf
, PAGE_SIZE
, "%u\n", rc6_residency
);
64 show_rc6p_ms(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
66 struct drm_minor
*dminor
= container_of(kdev
, struct drm_minor
, kdev
);
67 u32 rc6p_residency
= calc_residency(dminor
->dev
, GEN6_GT_GFX_RC6p
);
68 return snprintf(buf
, PAGE_SIZE
, "%u\n", rc6p_residency
);
72 show_rc6pp_ms(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
74 struct drm_minor
*dminor
= container_of(kdev
, struct drm_minor
, kdev
);
75 u32 rc6pp_residency
= calc_residency(dminor
->dev
, GEN6_GT_GFX_RC6pp
);
76 return snprintf(buf
, PAGE_SIZE
, "%u\n", rc6pp_residency
);
79 static DEVICE_ATTR(rc6_enable
, S_IRUGO
, show_rc6_mask
, NULL
);
80 static DEVICE_ATTR(rc6_residency_ms
, S_IRUGO
, show_rc6_ms
, NULL
);
81 static DEVICE_ATTR(rc6p_residency_ms
, S_IRUGO
, show_rc6p_ms
, NULL
);
82 static DEVICE_ATTR(rc6pp_residency_ms
, S_IRUGO
, show_rc6pp_ms
, NULL
);
84 static struct attribute
*rc6_attrs
[] = {
85 &dev_attr_rc6_enable
.attr
,
86 &dev_attr_rc6_residency_ms
.attr
,
87 &dev_attr_rc6p_residency_ms
.attr
,
88 &dev_attr_rc6pp_residency_ms
.attr
,
92 static struct attribute_group rc6_attr_group
= {
93 .name
= power_group_name
,
98 static int l3_access_valid(struct drm_device
*dev
, loff_t offset
)
100 if (!HAS_L3_GPU_CACHE(dev
))
106 if (offset
>= GEN7_L3LOG_SIZE
)
113 i915_l3_read(struct file
*filp
, struct kobject
*kobj
,
114 struct bin_attribute
*attr
, char *buf
,
115 loff_t offset
, size_t count
)
117 struct device
*dev
= container_of(kobj
, struct device
, kobj
);
118 struct drm_minor
*dminor
= container_of(dev
, struct drm_minor
, kdev
);
119 struct drm_device
*drm_dev
= dminor
->dev
;
120 struct drm_i915_private
*dev_priv
= drm_dev
->dev_private
;
124 count
= round_down(count
, 4);
126 ret
= l3_access_valid(drm_dev
, offset
);
130 count
= min_t(int, GEN7_L3LOG_SIZE
-offset
, count
);
132 ret
= i915_mutex_lock_interruptible(drm_dev
);
136 if (IS_HASWELL(drm_dev
)) {
137 if (dev_priv
->l3_parity
.remap_info
)
139 dev_priv
->l3_parity
.remap_info
+ (offset
/4),
142 memset(buf
, 0, count
);
147 misccpctl
= I915_READ(GEN7_MISCCPCTL
);
148 I915_WRITE(GEN7_MISCCPCTL
, misccpctl
& ~GEN7_DOP_CLOCK_GATE_ENABLE
);
150 for (i
= 0; i
< count
; i
+= 4)
151 *((uint32_t *)(&buf
[i
])) = I915_READ(GEN7_L3LOG_BASE
+ offset
+ i
);
153 I915_WRITE(GEN7_MISCCPCTL
, misccpctl
);
156 mutex_unlock(&drm_dev
->struct_mutex
);
162 i915_l3_write(struct file
*filp
, struct kobject
*kobj
,
163 struct bin_attribute
*attr
, char *buf
,
164 loff_t offset
, size_t count
)
166 struct device
*dev
= container_of(kobj
, struct device
, kobj
);
167 struct drm_minor
*dminor
= container_of(dev
, struct drm_minor
, kdev
);
168 struct drm_device
*drm_dev
= dminor
->dev
;
169 struct drm_i915_private
*dev_priv
= drm_dev
->dev_private
;
170 u32
*temp
= NULL
; /* Just here to make handling failures easy */
173 ret
= l3_access_valid(drm_dev
, offset
);
177 ret
= i915_mutex_lock_interruptible(drm_dev
);
181 if (!dev_priv
->l3_parity
.remap_info
) {
182 temp
= kzalloc(GEN7_L3LOG_SIZE
, GFP_KERNEL
);
184 mutex_unlock(&drm_dev
->struct_mutex
);
189 ret
= i915_gpu_idle(drm_dev
);
192 mutex_unlock(&drm_dev
->struct_mutex
);
196 /* TODO: Ideally we really want a GPU reset here to make sure errors
197 * aren't propagated. Since I cannot find a stable way to reset the GPU
198 * at this point it is left as a TODO.
201 dev_priv
->l3_parity
.remap_info
= temp
;
203 memcpy(dev_priv
->l3_parity
.remap_info
+ (offset
/4), buf
, count
);
205 i915_gem_l3_remap(drm_dev
);
207 mutex_unlock(&drm_dev
->struct_mutex
);
212 static struct bin_attribute dpf_attrs
= {
213 .attr
= {.name
= "l3_parity", .mode
= (S_IRUSR
| S_IWUSR
)},
214 .size
= GEN7_L3LOG_SIZE
,
215 .read
= i915_l3_read
,
216 .write
= i915_l3_write
,
220 static ssize_t
gt_cur_freq_mhz_show(struct device
*kdev
,
221 struct device_attribute
*attr
, char *buf
)
223 struct drm_minor
*minor
= container_of(kdev
, struct drm_minor
, kdev
);
224 struct drm_device
*dev
= minor
->dev
;
225 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
228 mutex_lock(&dev_priv
->rps
.hw_lock
);
229 if (IS_VALLEYVIEW(dev_priv
->dev
)) {
231 freq
= vlv_punit_read(dev_priv
, PUNIT_REG_GPU_FREQ_STS
);
232 ret
= vlv_gpu_freq(dev_priv
->mem_freq
, (freq
>> 8) & 0xff);
234 ret
= dev_priv
->rps
.cur_delay
* GT_FREQUENCY_MULTIPLIER
;
236 mutex_unlock(&dev_priv
->rps
.hw_lock
);
238 return snprintf(buf
, PAGE_SIZE
, "%d\n", ret
);
241 static ssize_t
vlv_rpe_freq_mhz_show(struct device
*kdev
,
242 struct device_attribute
*attr
, char *buf
)
244 struct drm_minor
*minor
= container_of(kdev
, struct drm_minor
, kdev
);
245 struct drm_device
*dev
= minor
->dev
;
246 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
248 return snprintf(buf
, PAGE_SIZE
, "%d\n",
249 vlv_gpu_freq(dev_priv
->mem_freq
,
250 dev_priv
->rps
.rpe_delay
));
253 static ssize_t
gt_max_freq_mhz_show(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
255 struct drm_minor
*minor
= container_of(kdev
, struct drm_minor
, kdev
);
256 struct drm_device
*dev
= minor
->dev
;
257 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
260 mutex_lock(&dev_priv
->rps
.hw_lock
);
261 if (IS_VALLEYVIEW(dev_priv
->dev
))
262 ret
= vlv_gpu_freq(dev_priv
->mem_freq
, dev_priv
->rps
.max_delay
);
264 ret
= dev_priv
->rps
.max_delay
* GT_FREQUENCY_MULTIPLIER
;
265 mutex_unlock(&dev_priv
->rps
.hw_lock
);
267 return snprintf(buf
, PAGE_SIZE
, "%d\n", ret
);
270 static ssize_t
gt_max_freq_mhz_store(struct device
*kdev
,
271 struct device_attribute
*attr
,
272 const char *buf
, size_t count
)
274 struct drm_minor
*minor
= container_of(kdev
, struct drm_minor
, kdev
);
275 struct drm_device
*dev
= minor
->dev
;
276 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
277 u32 val
, rp_state_cap
, hw_max
, hw_min
, non_oc_max
;
280 ret
= kstrtou32(buf
, 0, &val
);
284 mutex_lock(&dev_priv
->rps
.hw_lock
);
286 if (IS_VALLEYVIEW(dev_priv
->dev
)) {
287 val
= vlv_freq_opcode(dev_priv
->mem_freq
, val
);
289 hw_max
= valleyview_rps_max_freq(dev_priv
);
290 hw_min
= valleyview_rps_min_freq(dev_priv
);
293 val
/= GT_FREQUENCY_MULTIPLIER
;
295 rp_state_cap
= I915_READ(GEN6_RP_STATE_CAP
);
296 hw_max
= dev_priv
->rps
.hw_max
;
297 non_oc_max
= (rp_state_cap
& 0xff);
298 hw_min
= ((rp_state_cap
& 0xff0000) >> 16);
301 if (val
< hw_min
|| val
> hw_max
||
302 val
< dev_priv
->rps
.min_delay
) {
303 mutex_unlock(&dev_priv
->rps
.hw_lock
);
307 if (val
> non_oc_max
)
308 DRM_DEBUG("User requested overclocking to %d\n",
309 val
* GT_FREQUENCY_MULTIPLIER
);
311 if (dev_priv
->rps
.cur_delay
> val
) {
312 if (IS_VALLEYVIEW(dev_priv
->dev
))
313 valleyview_set_rps(dev_priv
->dev
, val
);
315 gen6_set_rps(dev_priv
->dev
, val
);
318 dev_priv
->rps
.max_delay
= val
;
320 mutex_unlock(&dev_priv
->rps
.hw_lock
);
325 static ssize_t
gt_min_freq_mhz_show(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
327 struct drm_minor
*minor
= container_of(kdev
, struct drm_minor
, kdev
);
328 struct drm_device
*dev
= minor
->dev
;
329 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
332 mutex_lock(&dev_priv
->rps
.hw_lock
);
333 if (IS_VALLEYVIEW(dev_priv
->dev
))
334 ret
= vlv_gpu_freq(dev_priv
->mem_freq
, dev_priv
->rps
.min_delay
);
336 ret
= dev_priv
->rps
.min_delay
* GT_FREQUENCY_MULTIPLIER
;
337 mutex_unlock(&dev_priv
->rps
.hw_lock
);
339 return snprintf(buf
, PAGE_SIZE
, "%d\n", ret
);
342 static ssize_t
gt_min_freq_mhz_store(struct device
*kdev
,
343 struct device_attribute
*attr
,
344 const char *buf
, size_t count
)
346 struct drm_minor
*minor
= container_of(kdev
, struct drm_minor
, kdev
);
347 struct drm_device
*dev
= minor
->dev
;
348 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
349 u32 val
, rp_state_cap
, hw_max
, hw_min
;
352 ret
= kstrtou32(buf
, 0, &val
);
356 mutex_lock(&dev_priv
->rps
.hw_lock
);
358 if (IS_VALLEYVIEW(dev
)) {
359 val
= vlv_freq_opcode(dev_priv
->mem_freq
, val
);
361 hw_max
= valleyview_rps_max_freq(dev_priv
);
362 hw_min
= valleyview_rps_min_freq(dev_priv
);
364 val
/= GT_FREQUENCY_MULTIPLIER
;
366 rp_state_cap
= I915_READ(GEN6_RP_STATE_CAP
);
367 hw_max
= dev_priv
->rps
.hw_max
;
368 hw_min
= ((rp_state_cap
& 0xff0000) >> 16);
371 if (val
< hw_min
|| val
> hw_max
|| val
> dev_priv
->rps
.max_delay
) {
372 mutex_unlock(&dev_priv
->rps
.hw_lock
);
376 if (dev_priv
->rps
.cur_delay
< val
) {
377 if (IS_VALLEYVIEW(dev
))
378 valleyview_set_rps(dev
, val
);
380 gen6_set_rps(dev_priv
->dev
, val
);
383 dev_priv
->rps
.min_delay
= val
;
385 mutex_unlock(&dev_priv
->rps
.hw_lock
);
391 static DEVICE_ATTR(gt_cur_freq_mhz
, S_IRUGO
, gt_cur_freq_mhz_show
, NULL
);
392 static DEVICE_ATTR(gt_max_freq_mhz
, S_IRUGO
| S_IWUSR
, gt_max_freq_mhz_show
, gt_max_freq_mhz_store
);
393 static DEVICE_ATTR(gt_min_freq_mhz
, S_IRUGO
| S_IWUSR
, gt_min_freq_mhz_show
, gt_min_freq_mhz_store
);
395 static DEVICE_ATTR(vlv_rpe_freq_mhz
, S_IRUGO
, vlv_rpe_freq_mhz_show
, NULL
);
397 static ssize_t
gt_rp_mhz_show(struct device
*kdev
, struct device_attribute
*attr
, char *buf
);
398 static DEVICE_ATTR(gt_RP0_freq_mhz
, S_IRUGO
, gt_rp_mhz_show
, NULL
);
399 static DEVICE_ATTR(gt_RP1_freq_mhz
, S_IRUGO
, gt_rp_mhz_show
, NULL
);
400 static DEVICE_ATTR(gt_RPn_freq_mhz
, S_IRUGO
, gt_rp_mhz_show
, NULL
);
402 /* For now we have a static number of RP states */
403 static ssize_t
gt_rp_mhz_show(struct device
*kdev
, struct device_attribute
*attr
, char *buf
)
405 struct drm_minor
*minor
= container_of(kdev
, struct drm_minor
, kdev
);
406 struct drm_device
*dev
= minor
->dev
;
407 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
408 u32 val
, rp_state_cap
;
411 ret
= mutex_lock_interruptible(&dev
->struct_mutex
);
414 rp_state_cap
= I915_READ(GEN6_RP_STATE_CAP
);
415 mutex_unlock(&dev
->struct_mutex
);
417 if (attr
== &dev_attr_gt_RP0_freq_mhz
) {
418 val
= ((rp_state_cap
& 0x0000ff) >> 0) * GT_FREQUENCY_MULTIPLIER
;
419 } else if (attr
== &dev_attr_gt_RP1_freq_mhz
) {
420 val
= ((rp_state_cap
& 0x00ff00) >> 8) * GT_FREQUENCY_MULTIPLIER
;
421 } else if (attr
== &dev_attr_gt_RPn_freq_mhz
) {
422 val
= ((rp_state_cap
& 0xff0000) >> 16) * GT_FREQUENCY_MULTIPLIER
;
426 return snprintf(buf
, PAGE_SIZE
, "%d\n", val
);
429 static const struct attribute
*gen6_attrs
[] = {
430 &dev_attr_gt_cur_freq_mhz
.attr
,
431 &dev_attr_gt_max_freq_mhz
.attr
,
432 &dev_attr_gt_min_freq_mhz
.attr
,
433 &dev_attr_gt_RP0_freq_mhz
.attr
,
434 &dev_attr_gt_RP1_freq_mhz
.attr
,
435 &dev_attr_gt_RPn_freq_mhz
.attr
,
439 static const struct attribute
*vlv_attrs
[] = {
440 &dev_attr_gt_cur_freq_mhz
.attr
,
441 &dev_attr_gt_max_freq_mhz
.attr
,
442 &dev_attr_gt_min_freq_mhz
.attr
,
443 &dev_attr_vlv_rpe_freq_mhz
.attr
,
447 static ssize_t
error_state_read(struct file
*filp
, struct kobject
*kobj
,
448 struct bin_attribute
*attr
, char *buf
,
449 loff_t off
, size_t count
)
452 struct device
*kdev
= container_of(kobj
, struct device
, kobj
);
453 struct drm_minor
*minor
= container_of(kdev
, struct drm_minor
, kdev
);
454 struct drm_device
*dev
= minor
->dev
;
455 struct i915_error_state_file_priv error_priv
;
456 struct drm_i915_error_state_buf error_str
;
457 ssize_t ret_count
= 0;
460 memset(&error_priv
, 0, sizeof(error_priv
));
462 ret
= i915_error_state_buf_init(&error_str
, count
, off
);
466 error_priv
.dev
= dev
;
467 i915_error_state_get(dev
, &error_priv
);
469 ret
= i915_error_state_to_str(&error_str
, &error_priv
);
473 ret_count
= count
< error_str
.bytes
? count
: error_str
.bytes
;
475 memcpy(buf
, error_str
.buf
, ret_count
);
477 i915_error_state_put(&error_priv
);
478 i915_error_state_buf_release(&error_str
);
480 return ret
?: ret_count
;
483 static ssize_t
error_state_write(struct file
*file
, struct kobject
*kobj
,
484 struct bin_attribute
*attr
, char *buf
,
485 loff_t off
, size_t count
)
487 struct device
*kdev
= container_of(kobj
, struct device
, kobj
);
488 struct drm_minor
*minor
= container_of(kdev
, struct drm_minor
, kdev
);
489 struct drm_device
*dev
= minor
->dev
;
492 DRM_DEBUG_DRIVER("Resetting error state\n");
494 ret
= mutex_lock_interruptible(&dev
->struct_mutex
);
498 i915_destroy_error_state(dev
);
499 mutex_unlock(&dev
->struct_mutex
);
504 static struct bin_attribute error_state_attr
= {
505 .attr
.name
= "error",
506 .attr
.mode
= S_IRUSR
| S_IWUSR
,
508 .read
= error_state_read
,
509 .write
= error_state_write
,
512 void i915_setup_sysfs(struct drm_device
*dev
)
517 if (INTEL_INFO(dev
)->gen
>= 6) {
518 ret
= sysfs_merge_group(&dev
->primary
->kdev
.kobj
,
521 DRM_ERROR("RC6 residency sysfs setup failed\n");
524 if (HAS_L3_GPU_CACHE(dev
)) {
525 ret
= device_create_bin_file(&dev
->primary
->kdev
, &dpf_attrs
);
527 DRM_ERROR("l3 parity sysfs setup failed\n");
531 if (IS_VALLEYVIEW(dev
))
532 ret
= sysfs_create_files(&dev
->primary
->kdev
.kobj
, vlv_attrs
);
533 else if (INTEL_INFO(dev
)->gen
>= 6)
534 ret
= sysfs_create_files(&dev
->primary
->kdev
.kobj
, gen6_attrs
);
536 DRM_ERROR("RPS sysfs setup failed\n");
538 ret
= sysfs_create_bin_file(&dev
->primary
->kdev
.kobj
,
541 DRM_ERROR("error_state sysfs setup failed\n");
544 void i915_teardown_sysfs(struct drm_device
*dev
)
546 sysfs_remove_bin_file(&dev
->primary
->kdev
.kobj
, &error_state_attr
);
547 if (IS_VALLEYVIEW(dev
))
548 sysfs_remove_files(&dev
->primary
->kdev
.kobj
, vlv_attrs
);
550 sysfs_remove_files(&dev
->primary
->kdev
.kobj
, gen6_attrs
);
551 device_remove_bin_file(&dev
->primary
->kdev
, &dpf_attrs
);
553 sysfs_unmerge_group(&dev
->primary
->kdev
.kobj
, &rc6_attr_group
);