14ae3aeabSSujaritha Sundaresan // SPDX-License-Identifier: MIT 24ae3aeabSSujaritha Sundaresan /* 34ae3aeabSSujaritha Sundaresan * Copyright © 2024 Intel Corporation 44ae3aeabSSujaritha Sundaresan */ 54ae3aeabSSujaritha Sundaresan #include <linux/sysfs.h> 64ae3aeabSSujaritha Sundaresan #include <drm/drm_managed.h> 74ae3aeabSSujaritha Sundaresan 84ae3aeabSSujaritha Sundaresan #include "xe_gt_types.h" 94ae3aeabSSujaritha Sundaresan #include "xe_pcode.h" 104ae3aeabSSujaritha Sundaresan #include "xe_pcode_api.h" 114ae3aeabSSujaritha Sundaresan #include "xe_tile.h" 124ae3aeabSSujaritha Sundaresan #include "xe_tile_sysfs.h" 134ae3aeabSSujaritha Sundaresan #include "xe_vram_freq.h" 144ae3aeabSSujaritha Sundaresan 154ae3aeabSSujaritha Sundaresan /** 164ae3aeabSSujaritha Sundaresan * DOC: Xe VRAM freq 174ae3aeabSSujaritha Sundaresan * 184ae3aeabSSujaritha Sundaresan * Provides sysfs entries for vram frequency in tile 194ae3aeabSSujaritha Sundaresan * 204ae3aeabSSujaritha Sundaresan * device/tile#/memory/freq0/max_freq - This is maximum frequency. This value is read-only as it 214ae3aeabSSujaritha Sundaresan * is the fixed fuse point P0. It is not the system 224ae3aeabSSujaritha Sundaresan * configuration. 234ae3aeabSSujaritha Sundaresan * device/tile#/memory/freq0/min_freq - This is minimum frequency. This value is read-only as it 244ae3aeabSSujaritha Sundaresan * is the fixed fuse point PN. It is not the system 254ae3aeabSSujaritha Sundaresan * configuration. 264ae3aeabSSujaritha Sundaresan */ 274ae3aeabSSujaritha Sundaresan 284ae3aeabSSujaritha Sundaresan static struct xe_tile *dev_to_tile(struct device *dev) 294ae3aeabSSujaritha Sundaresan { 304ae3aeabSSujaritha Sundaresan return kobj_to_tile(dev->kobj.parent); 314ae3aeabSSujaritha Sundaresan } 324ae3aeabSSujaritha Sundaresan 334ae3aeabSSujaritha Sundaresan static ssize_t max_freq_show(struct device *dev, struct device_attribute *attr, 344ae3aeabSSujaritha Sundaresan char *buf) 354ae3aeabSSujaritha Sundaresan { 364ae3aeabSSujaritha Sundaresan struct xe_tile *tile = dev_to_tile(dev); 374ae3aeabSSujaritha Sundaresan struct xe_gt *gt = tile->primary_gt; 384ae3aeabSSujaritha Sundaresan u32 val, mbox; 394ae3aeabSSujaritha Sundaresan int err; 404ae3aeabSSujaritha Sundaresan 414ae3aeabSSujaritha Sundaresan mbox = REG_FIELD_PREP(PCODE_MB_COMMAND, PCODE_FREQUENCY_CONFIG) 424ae3aeabSSujaritha Sundaresan | REG_FIELD_PREP(PCODE_MB_PARAM1, PCODE_MBOX_FC_SC_READ_FUSED_P0) 434ae3aeabSSujaritha Sundaresan | REG_FIELD_PREP(PCODE_MB_PARAM2, PCODE_MBOX_DOMAIN_HBM); 444ae3aeabSSujaritha Sundaresan 454ae3aeabSSujaritha Sundaresan err = xe_pcode_read(gt, mbox, &val, NULL); 464ae3aeabSSujaritha Sundaresan if (err) 474ae3aeabSSujaritha Sundaresan return err; 484ae3aeabSSujaritha Sundaresan 494ae3aeabSSujaritha Sundaresan /* data_out - Fused P0 for domain ID in units of 50 MHz */ 504ae3aeabSSujaritha Sundaresan val *= 50; 514ae3aeabSSujaritha Sundaresan 524ae3aeabSSujaritha Sundaresan return sysfs_emit(buf, "%u\n", val); 534ae3aeabSSujaritha Sundaresan } 544ae3aeabSSujaritha Sundaresan static DEVICE_ATTR_RO(max_freq); 554ae3aeabSSujaritha Sundaresan 564ae3aeabSSujaritha Sundaresan static ssize_t min_freq_show(struct device *dev, struct device_attribute *attr, 574ae3aeabSSujaritha Sundaresan char *buf) 584ae3aeabSSujaritha Sundaresan { 594ae3aeabSSujaritha Sundaresan struct xe_tile *tile = dev_to_tile(dev); 604ae3aeabSSujaritha Sundaresan struct xe_gt *gt = tile->primary_gt; 614ae3aeabSSujaritha Sundaresan u32 val, mbox; 624ae3aeabSSujaritha Sundaresan int err; 634ae3aeabSSujaritha Sundaresan 644ae3aeabSSujaritha Sundaresan mbox = REG_FIELD_PREP(PCODE_MB_COMMAND, PCODE_FREQUENCY_CONFIG) 654ae3aeabSSujaritha Sundaresan | REG_FIELD_PREP(PCODE_MB_PARAM1, PCODE_MBOX_FC_SC_READ_FUSED_PN) 664ae3aeabSSujaritha Sundaresan | REG_FIELD_PREP(PCODE_MB_PARAM2, PCODE_MBOX_DOMAIN_HBM); 674ae3aeabSSujaritha Sundaresan 684ae3aeabSSujaritha Sundaresan err = xe_pcode_read(gt, mbox, &val, NULL); 694ae3aeabSSujaritha Sundaresan if (err) 704ae3aeabSSujaritha Sundaresan return err; 714ae3aeabSSujaritha Sundaresan 724ae3aeabSSujaritha Sundaresan /* data_out - Fused Pn for domain ID in units of 50 MHz */ 734ae3aeabSSujaritha Sundaresan val *= 50; 744ae3aeabSSujaritha Sundaresan 754ae3aeabSSujaritha Sundaresan return sysfs_emit(buf, "%u\n", val); 764ae3aeabSSujaritha Sundaresan } 774ae3aeabSSujaritha Sundaresan static DEVICE_ATTR_RO(min_freq); 784ae3aeabSSujaritha Sundaresan 794ae3aeabSSujaritha Sundaresan static struct attribute *freq_attrs[] = { 804ae3aeabSSujaritha Sundaresan &dev_attr_max_freq.attr, 814ae3aeabSSujaritha Sundaresan &dev_attr_min_freq.attr, 824ae3aeabSSujaritha Sundaresan NULL 834ae3aeabSSujaritha Sundaresan }; 844ae3aeabSSujaritha Sundaresan 854ae3aeabSSujaritha Sundaresan static const struct attribute_group freq_group_attrs = { 864ae3aeabSSujaritha Sundaresan .name = "freq0", 874ae3aeabSSujaritha Sundaresan .attrs = freq_attrs, 884ae3aeabSSujaritha Sundaresan }; 894ae3aeabSSujaritha Sundaresan 904ae3aeabSSujaritha Sundaresan static void vram_freq_sysfs_fini(struct drm_device *drm, void *arg) 914ae3aeabSSujaritha Sundaresan { 924ae3aeabSSujaritha Sundaresan struct kobject *kobj = arg; 934ae3aeabSSujaritha Sundaresan 944ae3aeabSSujaritha Sundaresan sysfs_remove_group(kobj, &freq_group_attrs); 954ae3aeabSSujaritha Sundaresan kobject_put(kobj); 964ae3aeabSSujaritha Sundaresan } 974ae3aeabSSujaritha Sundaresan 98c885886bSSujaritha Sundaresan /** 99c885886bSSujaritha Sundaresan * xe_vram_freq_sysfs_init - Initialize vram frequency sysfs component 1004ae3aeabSSujaritha Sundaresan * @tile: Xe Tile object 1014ae3aeabSSujaritha Sundaresan * 1024ae3aeabSSujaritha Sundaresan * It needs to be initialized after the main tile component is ready 103*e3d0839aSHimal Prasad Ghimiray * 104*e3d0839aSHimal Prasad Ghimiray * Returns: 0 on success, negative error code on error. 1054ae3aeabSSujaritha Sundaresan */ 106*e3d0839aSHimal Prasad Ghimiray int xe_vram_freq_sysfs_init(struct xe_tile *tile) 1074ae3aeabSSujaritha Sundaresan { 1084ae3aeabSSujaritha Sundaresan struct xe_device *xe = tile_to_xe(tile); 1094ae3aeabSSujaritha Sundaresan struct kobject *kobj; 1104ae3aeabSSujaritha Sundaresan int err; 1114ae3aeabSSujaritha Sundaresan 1124ae3aeabSSujaritha Sundaresan if (xe->info.platform != XE_PVC) 113*e3d0839aSHimal Prasad Ghimiray return 0; 1144ae3aeabSSujaritha Sundaresan 1154ae3aeabSSujaritha Sundaresan kobj = kobject_create_and_add("memory", tile->sysfs); 116*e3d0839aSHimal Prasad Ghimiray if (!kobj) 117*e3d0839aSHimal Prasad Ghimiray return -ENOMEM; 1184ae3aeabSSujaritha Sundaresan 1194ae3aeabSSujaritha Sundaresan err = sysfs_create_group(kobj, &freq_group_attrs); 1204ae3aeabSSujaritha Sundaresan if (err) { 1214ae3aeabSSujaritha Sundaresan kobject_put(kobj); 122*e3d0839aSHimal Prasad Ghimiray return err; 1234ae3aeabSSujaritha Sundaresan } 1244ae3aeabSSujaritha Sundaresan 125*e3d0839aSHimal Prasad Ghimiray return drmm_add_action_or_reset(&xe->drm, vram_freq_sysfs_fini, kobj); 1264ae3aeabSSujaritha Sundaresan } 127