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
dev_to_tile(struct device * dev)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
max_freq_show(struct device * dev,struct device_attribute * attr,char * buf)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 u32 val, mbox;
384ae3aeabSSujaritha Sundaresan int err;
394ae3aeabSSujaritha Sundaresan
404ae3aeabSSujaritha Sundaresan mbox = REG_FIELD_PREP(PCODE_MB_COMMAND, PCODE_FREQUENCY_CONFIG)
414ae3aeabSSujaritha Sundaresan | REG_FIELD_PREP(PCODE_MB_PARAM1, PCODE_MBOX_FC_SC_READ_FUSED_P0)
424ae3aeabSSujaritha Sundaresan | REG_FIELD_PREP(PCODE_MB_PARAM2, PCODE_MBOX_DOMAIN_HBM);
434ae3aeabSSujaritha Sundaresan
44*fe13fd68SMatt Roper err = xe_pcode_read(tile, mbox, &val, NULL);
454ae3aeabSSujaritha Sundaresan if (err)
464ae3aeabSSujaritha Sundaresan return err;
474ae3aeabSSujaritha Sundaresan
484ae3aeabSSujaritha Sundaresan /* data_out - Fused P0 for domain ID in units of 50 MHz */
494ae3aeabSSujaritha Sundaresan val *= 50;
504ae3aeabSSujaritha Sundaresan
514ae3aeabSSujaritha Sundaresan return sysfs_emit(buf, "%u\n", val);
524ae3aeabSSujaritha Sundaresan }
534ae3aeabSSujaritha Sundaresan static DEVICE_ATTR_RO(max_freq);
544ae3aeabSSujaritha Sundaresan
min_freq_show(struct device * dev,struct device_attribute * attr,char * buf)554ae3aeabSSujaritha Sundaresan static ssize_t min_freq_show(struct device *dev, struct device_attribute *attr,
564ae3aeabSSujaritha Sundaresan char *buf)
574ae3aeabSSujaritha Sundaresan {
584ae3aeabSSujaritha Sundaresan struct xe_tile *tile = dev_to_tile(dev);
594ae3aeabSSujaritha Sundaresan u32 val, mbox;
604ae3aeabSSujaritha Sundaresan int err;
614ae3aeabSSujaritha Sundaresan
624ae3aeabSSujaritha Sundaresan mbox = REG_FIELD_PREP(PCODE_MB_COMMAND, PCODE_FREQUENCY_CONFIG)
634ae3aeabSSujaritha Sundaresan | REG_FIELD_PREP(PCODE_MB_PARAM1, PCODE_MBOX_FC_SC_READ_FUSED_PN)
644ae3aeabSSujaritha Sundaresan | REG_FIELD_PREP(PCODE_MB_PARAM2, PCODE_MBOX_DOMAIN_HBM);
654ae3aeabSSujaritha Sundaresan
66*fe13fd68SMatt Roper err = xe_pcode_read(tile, mbox, &val, NULL);
674ae3aeabSSujaritha Sundaresan if (err)
684ae3aeabSSujaritha Sundaresan return err;
694ae3aeabSSujaritha Sundaresan
704ae3aeabSSujaritha Sundaresan /* data_out - Fused Pn for domain ID in units of 50 MHz */
714ae3aeabSSujaritha Sundaresan val *= 50;
724ae3aeabSSujaritha Sundaresan
734ae3aeabSSujaritha Sundaresan return sysfs_emit(buf, "%u\n", val);
744ae3aeabSSujaritha Sundaresan }
754ae3aeabSSujaritha Sundaresan static DEVICE_ATTR_RO(min_freq);
764ae3aeabSSujaritha Sundaresan
774ae3aeabSSujaritha Sundaresan static struct attribute *freq_attrs[] = {
784ae3aeabSSujaritha Sundaresan &dev_attr_max_freq.attr,
794ae3aeabSSujaritha Sundaresan &dev_attr_min_freq.attr,
804ae3aeabSSujaritha Sundaresan NULL
814ae3aeabSSujaritha Sundaresan };
824ae3aeabSSujaritha Sundaresan
834ae3aeabSSujaritha Sundaresan static const struct attribute_group freq_group_attrs = {
844ae3aeabSSujaritha Sundaresan .name = "freq0",
854ae3aeabSSujaritha Sundaresan .attrs = freq_attrs,
864ae3aeabSSujaritha Sundaresan };
874ae3aeabSSujaritha Sundaresan
vram_freq_sysfs_fini(void * arg)88c60f91bbSMatthew Auld static void vram_freq_sysfs_fini(void *arg)
894ae3aeabSSujaritha Sundaresan {
904ae3aeabSSujaritha Sundaresan struct kobject *kobj = arg;
914ae3aeabSSujaritha Sundaresan
924ae3aeabSSujaritha Sundaresan sysfs_remove_group(kobj, &freq_group_attrs);
934ae3aeabSSujaritha Sundaresan kobject_put(kobj);
944ae3aeabSSujaritha Sundaresan }
954ae3aeabSSujaritha Sundaresan
96c885886bSSujaritha Sundaresan /**
97c885886bSSujaritha Sundaresan * xe_vram_freq_sysfs_init - Initialize vram frequency sysfs component
984ae3aeabSSujaritha Sundaresan * @tile: Xe Tile object
994ae3aeabSSujaritha Sundaresan *
1004ae3aeabSSujaritha Sundaresan * It needs to be initialized after the main tile component is ready
101e3d0839aSHimal Prasad Ghimiray *
102e3d0839aSHimal Prasad Ghimiray * Returns: 0 on success, negative error code on error.
1034ae3aeabSSujaritha Sundaresan */
xe_vram_freq_sysfs_init(struct xe_tile * tile)104e3d0839aSHimal Prasad Ghimiray int xe_vram_freq_sysfs_init(struct xe_tile *tile)
1054ae3aeabSSujaritha Sundaresan {
1064ae3aeabSSujaritha Sundaresan struct xe_device *xe = tile_to_xe(tile);
1074ae3aeabSSujaritha Sundaresan struct kobject *kobj;
1084ae3aeabSSujaritha Sundaresan int err;
1094ae3aeabSSujaritha Sundaresan
1104ae3aeabSSujaritha Sundaresan if (xe->info.platform != XE_PVC)
111e3d0839aSHimal Prasad Ghimiray return 0;
1124ae3aeabSSujaritha Sundaresan
1134ae3aeabSSujaritha Sundaresan kobj = kobject_create_and_add("memory", tile->sysfs);
114e3d0839aSHimal Prasad Ghimiray if (!kobj)
115e3d0839aSHimal Prasad Ghimiray return -ENOMEM;
1164ae3aeabSSujaritha Sundaresan
1174ae3aeabSSujaritha Sundaresan err = sysfs_create_group(kobj, &freq_group_attrs);
1184ae3aeabSSujaritha Sundaresan if (err) {
1194ae3aeabSSujaritha Sundaresan kobject_put(kobj);
120e3d0839aSHimal Prasad Ghimiray return err;
1214ae3aeabSSujaritha Sundaresan }
1224ae3aeabSSujaritha Sundaresan
123c60f91bbSMatthew Auld return devm_add_action_or_reset(xe->drm.dev, vram_freq_sysfs_fini, kobj);
1244ae3aeabSSujaritha Sundaresan }
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