/* * Copyright © 2012 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. * * Authors: * Ben Widawsky * */ #include #include #include #include #include "gt/intel_rc6.h" #include "gt/intel_rps.h" #include "gt/sysfs_engines.h" #include "i915_drv.h" #include "i915_sysfs.h" #include "intel_pm.h" #include "intel_sideband.h" static inline struct drm_i915_private *kdev_minor_to_i915(struct device *kdev) { struct drm_minor *minor = dev_get_drvdata(kdev); return to_i915(minor->dev); } #ifdef CONFIG_PM static u32 calc_residency(struct drm_i915_private *dev_priv, i915_reg_t reg) { intel_wakeref_t wakeref; u64 res = 0; with_intel_runtime_pm(&dev_priv->runtime_pm, wakeref) res = intel_rc6_residency_us(&dev_priv->gt.rc6, reg); return DIV_ROUND_CLOSEST_ULL(res, 1000); } static ssize_t show_rc6_mask(struct device *kdev, struct device_attribute *attr, char *buf) { struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); unsigned int mask; mask = 0; if (HAS_RC6(dev_priv)) mask |= BIT(0); if (HAS_RC6p(dev_priv)) mask |= BIT(1); if (HAS_RC6pp(dev_priv)) mask |= BIT(2); return snprintf(buf, PAGE_SIZE, "%x\n", mask); } static ssize_t show_rc6_ms(struct device *kdev, struct device_attribute *attr, char *buf) { struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); u32 rc6_residency = calc_residency(dev_priv, GEN6_GT_GFX_RC6); return snprintf(buf, PAGE_SIZE, "%u\n", rc6_residency); } static ssize_t show_rc6p_ms(struct device *kdev, struct device_attribute *attr, char *buf) { struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); u32 rc6p_residency = calc_residency(dev_priv, GEN6_GT_GFX_RC6p); return snprintf(buf, PAGE_SIZE, "%u\n", rc6p_residency); } static ssize_t show_rc6pp_ms(struct device *kdev, struct device_attribute *attr, char *buf) { struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); u32 rc6pp_residency = calc_residency(dev_priv, GEN6_GT_GFX_RC6pp); return snprintf(buf, PAGE_SIZE, "%u\n", rc6pp_residency); } static ssize_t show_media_rc6_ms(struct device *kdev, struct device_attribute *attr, char *buf) { struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); u32 rc6_residency = calc_residency(dev_priv, VLV_GT_MEDIA_RC6); return snprintf(buf, PAGE_SIZE, "%u\n", rc6_residency); } static DEVICE_ATTR(rc6_enable, S_IRUGO, show_rc6_mask, NULL); static DEVICE_ATTR(rc6_residency_ms, S_IRUGO, show_rc6_ms, NULL); static DEVICE_ATTR(rc6p_residency_ms, S_IRUGO, show_rc6p_ms, NULL); static DEVICE_ATTR(rc6pp_residency_ms, S_IRUGO, show_rc6pp_ms, NULL); static DEVICE_ATTR(media_rc6_residency_ms, S_IRUGO, show_media_rc6_ms, NULL); static struct attribute *rc6_attrs[] = { &dev_attr_rc6_enable.attr, &dev_attr_rc6_residency_ms.attr, NULL }; static const struct attribute_group rc6_attr_group = { .name = power_group_name, .attrs = rc6_attrs }; static struct attribute *rc6p_attrs[] = { &dev_attr_rc6p_residency_ms.attr, &dev_attr_rc6pp_residency_ms.attr, NULL }; static const struct attribute_group rc6p_attr_group = { .name = power_group_name, .attrs = rc6p_attrs }; static struct attribute *media_rc6_attrs[] = { &dev_attr_media_rc6_residency_ms.attr, NULL }; static const struct attribute_group media_rc6_attr_group = { .name = power_group_name, .attrs = media_rc6_attrs }; #endif static int l3_access_valid(struct drm_i915_private *i915, loff_t offset) { if (!HAS_L3_DPF(i915)) return -EPERM; if (!IS_ALIGNED(offset, sizeof(u32))) return -EINVAL; if (offset >= GEN7_L3LOG_SIZE) return -ENXIO; return 0; } static ssize_t i915_l3_read(struct file *filp, struct kobject *kobj, struct bin_attribute *attr, char *buf, loff_t offset, size_t count) { struct device *kdev = kobj_to_dev(kobj); struct drm_i915_private *i915 = kdev_minor_to_i915(kdev); int slice = (int)(uintptr_t)attr->private; int ret; ret = l3_access_valid(i915, offset); if (ret) return ret; count = round_down(count, sizeof(u32)); count = min_t(size_t, GEN7_L3LOG_SIZE - offset, count); memset(buf, 0, count); spin_lock(&i915->gem.contexts.lock); if (i915->l3_parity.remap_info[slice]) memcpy(buf, i915->l3_parity.remap_info[slice] + offset / sizeof(u32), count); spin_unlock(&i915->gem.contexts.lock); return count; } static ssize_t i915_l3_write(struct file *filp, struct kobject *kobj, struct bin_attribute *attr, char *buf, loff_t offset, size_t count) { struct device *kdev = kobj_to_dev(kobj); struct drm_i915_private *i915 = kdev_minor_to_i915(kdev); int slice = (int)(uintptr_t)attr->private; u32 *remap_info, *freeme = NULL; struct i915_gem_context *ctx; int ret; ret = l3_access_valid(i915, offset); if (ret) return ret; if (count < sizeof(u32)) return -EINVAL; remap_info = kzalloc(GEN7_L3LOG_SIZE, GFP_KERNEL); if (!remap_info) return -ENOMEM; spin_lock(&i915->gem.contexts.lock); if (i915->l3_parity.remap_info[slice]) { freeme = remap_info; remap_info = i915->l3_parity.remap_info[slice]; } else { i915->l3_parity.remap_info[slice] = remap_info; } count = round_down(count, sizeof(u32)); memcpy(remap_info + offset / sizeof(u32), buf, count); /* NB: We defer the remapping until we switch to the context */ list_for_each_entry(ctx, &i915->gem.contexts.list, link) ctx->remap_slice |= BIT(slice); spin_unlock(&i915->gem.contexts.lock); kfree(freeme); /* * TODO: Ideally we really want a GPU reset here to make sure errors * aren't propagated. Since I cannot find a stable way to reset the GPU * at this point it is left as a TODO. */ return count; } static const struct bin_attribute dpf_attrs = { .attr = {.name = "l3_parity", .mode = (S_IRUSR | S_IWUSR)}, .size = GEN7_L3LOG_SIZE, .read = i915_l3_read, .write = i915_l3_write, .mmap = NULL, .private = (void *)0 }; static const struct bin_attribute dpf_attrs_1 = { .attr = {.name = "l3_parity_slice_1", .mode = (S_IRUSR | S_IWUSR)}, .size = GEN7_L3LOG_SIZE, .read = i915_l3_read, .write = i915_l3_write, .mmap = NULL, .private = (void *)1 }; static ssize_t gt_act_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf) { struct drm_i915_private *i915 = kdev_minor_to_i915(kdev); struct intel_rps *rps = &i915->gt.rps; return snprintf(buf, PAGE_SIZE, "%d\n", intel_rps_read_actual_frequency(rps)); } static ssize_t gt_cur_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf) { struct drm_i915_private *i915 = kdev_minor_to_i915(kdev); struct intel_rps *rps = &i915->gt.rps; return snprintf(buf, PAGE_SIZE, "%d\n", intel_gpu_freq(rps, rps->cur_freq)); } static ssize_t gt_boost_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf) { struct drm_i915_private *i915 = kdev_minor_to_i915(kdev); struct intel_rps *rps = &i915->gt.rps; return snprintf(buf, PAGE_SIZE, "%d\n", intel_gpu_freq(rps, rps->boost_freq)); } static ssize_t gt_boost_freq_mhz_store(struct device *kdev, struct device_attribute *attr, const char *buf, size_t count) { struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); struct intel_rps *rps = &dev_priv->gt.rps; bool boost = false; ssize_t ret; u32 val; ret = kstrtou32(buf, 0, &val); if (ret) return ret; /* Validate against (static) hardware limits */ val = intel_freq_opcode(rps, val); if (val < rps->min_freq || val > rps->max_freq) return -EINVAL; mutex_lock(&rps->lock); if (val != rps->boost_freq) { rps->boost_freq = val; boost = atomic_read(&rps->num_waiters); } mutex_unlock(&rps->lock); if (boost) schedule_work(&rps->work); return count; } static ssize_t vlv_rpe_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf) { struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); struct intel_rps *rps = &dev_priv->gt.rps; return snprintf(buf, PAGE_SIZE, "%d\n", intel_gpu_freq(rps, rps->efficient_freq)); } static ssize_t gt_max_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf) { struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); struct intel_rps *rps = &dev_priv->gt.rps; return snprintf(buf, PAGE_SIZE, "%d\n", intel_gpu_freq(rps, rps->max_freq_softlimit)); } static ssize_t gt_max_freq_mhz_store(struct device *kdev, struct device_attribute *attr, const char *buf, size_t count) { struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); struct intel_rps *rps = &dev_priv->gt.rps; ssize_t ret; u32 val; ret = kstrtou32(buf, 0, &val); if (ret) return ret; mutex_lock(&rps->lock); val = intel_freq_opcode(rps, val); if (val < rps->min_freq || val > rps->max_freq || val < rps->min_freq_softlimit) { ret = -EINVAL; goto unlock; } if (val > rps->rp0_freq) DRM_DEBUG("User requested overclocking to %d\n", intel_gpu_freq(rps, val)); rps->max_freq_softlimit = val; val = clamp_t(int, rps->cur_freq, rps->min_freq_softlimit, rps->max_freq_softlimit); /* * We still need *_set_rps to process the new max_delay and * update the interrupt limits and PMINTRMSK even though * frequency request may be unchanged. */ intel_rps_set(rps, val); unlock: mutex_unlock(&rps->lock); return ret ?: count; } static ssize_t gt_min_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf) { struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); struct intel_rps *rps = &dev_priv->gt.rps; return snprintf(buf, PAGE_SIZE, "%d\n", intel_gpu_freq(rps, rps->min_freq_softlimit)); } static ssize_t gt_min_freq_mhz_store(struct device *kdev, struct device_attribute *attr, const char *buf, size_t count) { struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); struct intel_rps *rps = &dev_priv->gt.rps; ssize_t ret; u32 val; ret = kstrtou32(buf, 0, &val); if (ret) return ret; mutex_lock(&rps->lock); val = intel_freq_opcode(rps, val); if (val < rps->min_freq || val > rps->max_freq || val > rps->max_freq_softlimit) { ret = -EINVAL; goto unlock; } rps->min_freq_softlimit = val; val = clamp_t(int, rps->cur_freq, rps->min_freq_softlimit, rps->max_freq_softlimit); /* * We still need *_set_rps to process the new min_delay and * update the interrupt limits and PMINTRMSK even though * frequency request may be unchanged. */ intel_rps_set(rps, val); unlock: mutex_unlock(&rps->lock); return ret ?: count; } static DEVICE_ATTR_RO(gt_act_freq_mhz); static DEVICE_ATTR_RO(gt_cur_freq_mhz); static DEVICE_ATTR_RW(gt_boost_freq_mhz); static DEVICE_ATTR_RW(gt_max_freq_mhz); static DEVICE_ATTR_RW(gt_min_freq_mhz); static DEVICE_ATTR_RO(vlv_rpe_freq_mhz); static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf); static DEVICE_ATTR(gt_RP0_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL); static DEVICE_ATTR(gt_RP1_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL); static DEVICE_ATTR(gt_RPn_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL); /* For now we have a static number of RP states */ static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf) { struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); struct intel_rps *rps = &dev_priv->gt.rps; u32 val; if (attr == &dev_attr_gt_RP0_freq_mhz) val = intel_gpu_freq(rps, rps->rp0_freq); else if (attr == &dev_attr_gt_RP1_freq_mhz) val = intel_gpu_freq(rps, rps->rp1_freq); else if (attr == &dev_attr_gt_RPn_freq_mhz) val = intel_gpu_freq(rps, rps->min_freq); else BUG(); return snprintf(buf, PAGE_SIZE, "%d\n", val); } static const struct attribute * const gen6_attrs[] = { &dev_attr_gt_act_freq_mhz.attr, &dev_attr_gt_cur_freq_mhz.attr, &dev_attr_gt_boost_freq_mhz.attr, &dev_attr_gt_max_freq_mhz.attr, &dev_attr_gt_min_freq_mhz.attr, &dev_attr_gt_RP0_freq_mhz.attr, &dev_attr_gt_RP1_freq_mhz.attr, &dev_attr_gt_RPn_freq_mhz.attr, NULL, }; static const struct attribute * const vlv_attrs[] = { &dev_attr_gt_act_freq_mhz.attr, &dev_attr_gt_cur_freq_mhz.attr, &dev_attr_gt_boost_freq_mhz.attr, &dev_attr_gt_max_freq_mhz.attr, &dev_attr_gt_min_freq_mhz.attr, &dev_attr_gt_RP0_freq_mhz.attr, &dev_attr_gt_RP1_freq_mhz.attr, &dev_attr_gt_RPn_freq_mhz.attr, &dev_attr_vlv_rpe_freq_mhz.attr, NULL, }; #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR) static ssize_t error_state_read(struct file *filp, struct kobject *kobj, struct bin_attribute *attr, char *buf, loff_t off, size_t count) { struct device *kdev = kobj_to_dev(kobj); struct drm_i915_private *i915 = kdev_minor_to_i915(kdev); struct i915_gpu_coredump *gpu; ssize_t ret = 0; /* * FIXME: Concurrent clients triggering resets and reading + clearing * dumps can cause inconsistent sysfs reads when a user calls in with a * non-zero offset to complete a prior partial read but the * gpu_coredump has been cleared or replaced. */ gpu = i915_first_error_state(i915); if (IS_ERR(gpu)) { ret = PTR_ERR(gpu); } else if (gpu) { ret = i915_gpu_coredump_copy_to_buffer(gpu, buf, off, count); i915_gpu_coredump_put(gpu); } else { const char *str = "No error state collected\n"; size_t len = strlen(str); if (off < len) { ret = min_t(size_t, count, len - off); memcpy(buf, str + off, ret); } } return ret; } static ssize_t error_state_write(struct file *file, struct kobject *kobj, struct bin_attribute *attr, char *buf, loff_t off, size_t count) { struct device *kdev = kobj_to_dev(kobj); struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); drm_dbg(&dev_priv->drm, "Resetting error state\n"); i915_reset_error_state(dev_priv); return count; } static const struct bin_attribute error_state_attr = { .attr.name = "error", .attr.mode = S_IRUSR | S_IWUSR, .size = 0, .read = error_state_read, .write = error_state_write, }; static void i915_setup_error_capture(struct device *kdev) { if (sysfs_create_bin_file(&kdev->kobj, &error_state_attr)) DRM_ERROR("error_state sysfs setup failed\n"); } static void i915_teardown_error_capture(struct device *kdev) { sysfs_remove_bin_file(&kdev->kobj, &error_state_attr); } #else static void i915_setup_error_capture(struct device *kdev) {} static void i915_teardown_error_capture(struct device *kdev) {} #endif void i915_setup_sysfs(struct drm_i915_private *dev_priv) { struct device *kdev = dev_priv->drm.primary->kdev; int ret; #ifdef CONFIG_PM if (HAS_RC6(dev_priv)) { ret = sysfs_merge_group(&kdev->kobj, &rc6_attr_group); if (ret) drm_err(&dev_priv->drm, "RC6 residency sysfs setup failed\n"); } if (HAS_RC6p(dev_priv)) { ret = sysfs_merge_group(&kdev->kobj, &rc6p_attr_group); if (ret) drm_err(&dev_priv->drm, "RC6p residency sysfs setup failed\n"); } if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { ret = sysfs_merge_group(&kdev->kobj, &media_rc6_attr_group); if (ret) drm_err(&dev_priv->drm, "Media RC6 residency sysfs setup failed\n"); } #endif if (HAS_L3_DPF(dev_priv)) { ret = device_create_bin_file(kdev, &dpf_attrs); if (ret) drm_err(&dev_priv->drm, "l3 parity sysfs setup failed\n"); if (NUM_L3_SLICES(dev_priv) > 1) { ret = device_create_bin_file(kdev, &dpf_attrs_1); if (ret) drm_err(&dev_priv->drm, "l3 parity slice 1 setup failed\n"); } } ret = 0; if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) ret = sysfs_create_files(&kdev->kobj, vlv_attrs); else if (INTEL_GEN(dev_priv) >= 6) ret = sysfs_create_files(&kdev->kobj, gen6_attrs); if (ret) drm_err(&dev_priv->drm, "RPS sysfs setup failed\n"); i915_setup_error_capture(kdev); intel_engines_add_sysfs(dev_priv); } void i915_teardown_sysfs(struct drm_i915_private *dev_priv) { struct device *kdev = dev_priv->drm.primary->kdev; i915_teardown_error_capture(kdev); if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) sysfs_remove_files(&kdev->kobj, vlv_attrs); else sysfs_remove_files(&kdev->kobj, gen6_attrs); device_remove_bin_file(kdev, &dpf_attrs_1); device_remove_bin_file(kdev, &dpf_attrs); #ifdef CONFIG_PM sysfs_unmerge_group(&kdev->kobj, &rc6_attr_group); sysfs_unmerge_group(&kdev->kobj, &rc6p_attr_group); #endif }