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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-19 21:00:37 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-19 21:00:37 +0000 |
commit | 94ac2ab3fff96814d7460a27a0e9d004abbd4128 (patch) | |
tree | 9a4eb8cc234b540b0f4b93363109cdd37a20540b /drivers/gpu/drm/xe/xe_vram_freq.c | |
parent | Adding debian version 6.8.12-1. (diff) | |
download | linux-94ac2ab3fff96814d7460a27a0e9d004abbd4128.tar.xz linux-94ac2ab3fff96814d7460a27a0e9d004abbd4128.zip |
Merging upstream version 6.9.2.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/xe/xe_vram_freq.c')
-rw-r--r-- | drivers/gpu/drm/xe/xe_vram_freq.c | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_vram_freq.c b/drivers/gpu/drm/xe/xe_vram_freq.c new file mode 100644 index 0000000000..c5f6b5a5d1 --- /dev/null +++ b/drivers/gpu/drm/xe/xe_vram_freq.c @@ -0,0 +1,130 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2024 Intel Corporation + */ +#include <linux/sysfs.h> +#include <drm/drm_managed.h> + +#include "xe_gt_types.h" +#include "xe_pcode.h" +#include "xe_pcode_api.h" +#include "xe_tile.h" +#include "xe_tile_sysfs.h" +#include "xe_vram_freq.h" + +/** + * DOC: Xe VRAM freq + * + * Provides sysfs entries for vram frequency in tile + * + * device/tile#/memory/freq0/max_freq - This is maximum frequency. This value is read-only as it + * is the fixed fuse point P0. It is not the system + * configuration. + * device/tile#/memory/freq0/min_freq - This is minimum frequency. This value is read-only as it + * is the fixed fuse point PN. It is not the system + * configuration. + */ + +static struct xe_tile *dev_to_tile(struct device *dev) +{ + return kobj_to_tile(dev->kobj.parent); +} + +static ssize_t max_freq_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct xe_tile *tile = dev_to_tile(dev); + struct xe_gt *gt = tile->primary_gt; + u32 val, mbox; + int err; + + mbox = REG_FIELD_PREP(PCODE_MB_COMMAND, PCODE_FREQUENCY_CONFIG) + | REG_FIELD_PREP(PCODE_MB_PARAM1, PCODE_MBOX_FC_SC_READ_FUSED_P0) + | REG_FIELD_PREP(PCODE_MB_PARAM2, PCODE_MBOX_DOMAIN_HBM); + + err = xe_pcode_read(gt, mbox, &val, NULL); + if (err) + return err; + + /* data_out - Fused P0 for domain ID in units of 50 MHz */ + val *= 50; + + return sysfs_emit(buf, "%u\n", val); +} +static DEVICE_ATTR_RO(max_freq); + +static ssize_t min_freq_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct xe_tile *tile = dev_to_tile(dev); + struct xe_gt *gt = tile->primary_gt; + u32 val, mbox; + int err; + + mbox = REG_FIELD_PREP(PCODE_MB_COMMAND, PCODE_FREQUENCY_CONFIG) + | REG_FIELD_PREP(PCODE_MB_PARAM1, PCODE_MBOX_FC_SC_READ_FUSED_PN) + | REG_FIELD_PREP(PCODE_MB_PARAM2, PCODE_MBOX_DOMAIN_HBM); + + err = xe_pcode_read(gt, mbox, &val, NULL); + if (err) + return err; + + /* data_out - Fused Pn for domain ID in units of 50 MHz */ + val *= 50; + + return sysfs_emit(buf, "%u\n", val); +} +static DEVICE_ATTR_RO(min_freq); + +static struct attribute *freq_attrs[] = { + &dev_attr_max_freq.attr, + &dev_attr_min_freq.attr, + NULL +}; + +static const struct attribute_group freq_group_attrs = { + .name = "freq0", + .attrs = freq_attrs, +}; + +static void vram_freq_sysfs_fini(struct drm_device *drm, void *arg) +{ + struct kobject *kobj = arg; + + sysfs_remove_group(kobj, &freq_group_attrs); + kobject_put(kobj); +} + +/** + * xe_vram_freq_sysfs_init - Initialize vram frequency sysfs component + * @tile: Xe Tile object + * + * It needs to be initialized after the main tile component is ready + */ +void xe_vram_freq_sysfs_init(struct xe_tile *tile) +{ + struct xe_device *xe = tile_to_xe(tile); + struct kobject *kobj; + int err; + + if (xe->info.platform != XE_PVC) + return; + + kobj = kobject_create_and_add("memory", tile->sysfs); + if (!kobj) { + drm_warn(&xe->drm, "failed to add memory directory, err: %d\n", -ENOMEM); + return; + } + + err = sysfs_create_group(kobj, &freq_group_attrs); + if (err) { + kobject_put(kobj); + drm_warn(&xe->drm, "failed to register vram freq sysfs, err: %d\n", err); + return; + } + + err = drmm_add_action_or_reset(&xe->drm, vram_freq_sysfs_fini, kobj); + if (err) + drm_warn(&xe->drm, "%s: drmm_add_action_or_reset failed, err: %d\n", + __func__, err); +} |