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Instead of allowing the driver to load with incomplete sysfs entries in case of sysfs creation failure, we should terminate the driver loading. This change ensures that the status of all gt associated sysfs entries creation is relayed to xe_gt_init, leading to a driver load abort if any sysfs creation failures occur. -v2 use err_force_wake label instead of new. (Lucas) Avoid unnecessary warn/error messages. (Lucas) Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Lucas De Marchi <lucas.demarchi@intel.com> Signed-off-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com> Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240412181211.1155732-6-himal.prasad.ghimiray@intel.com Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
208 lines
5.2 KiB
C
208 lines
5.2 KiB
C
// SPDX-License-Identifier: MIT
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/*
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* Copyright © 2023 Intel Corporation
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*/
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#include <drm/drm_managed.h>
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#include "xe_device.h"
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#include "xe_gt.h"
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#include "xe_gt_idle.h"
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#include "xe_gt_sysfs.h"
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#include "xe_guc_pc.h"
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#include "regs/xe_gt_regs.h"
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#include "xe_mmio.h"
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#include "xe_pm.h"
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/**
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* DOC: Xe GT Idle
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*
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* Contains functions that init GT idle features like C6
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*
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* device/gt#/gtidle/name - name of the state
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* device/gt#/gtidle/idle_residency_ms - Provides residency of the idle state in ms
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* device/gt#/gtidle/idle_status - Provides current idle state
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*/
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static struct xe_gt_idle *dev_to_gtidle(struct device *dev)
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{
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struct kobject *kobj = &dev->kobj;
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return &kobj_to_gt(kobj->parent)->gtidle;
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}
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static struct xe_gt *gtidle_to_gt(struct xe_gt_idle *gtidle)
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{
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return container_of(gtidle, struct xe_gt, gtidle);
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}
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static struct xe_guc_pc *gtidle_to_pc(struct xe_gt_idle *gtidle)
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{
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return >idle_to_gt(gtidle)->uc.guc.pc;
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}
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static struct xe_device *
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pc_to_xe(struct xe_guc_pc *pc)
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{
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struct xe_guc *guc = container_of(pc, struct xe_guc, pc);
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struct xe_gt *gt = container_of(guc, struct xe_gt, uc.guc);
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return gt_to_xe(gt);
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}
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static const char *gt_idle_state_to_string(enum xe_gt_idle_state state)
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{
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switch (state) {
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case GT_IDLE_C0:
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return "gt-c0";
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case GT_IDLE_C6:
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return "gt-c6";
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default:
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return "unknown";
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}
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}
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static u64 get_residency_ms(struct xe_gt_idle *gtidle, u64 cur_residency)
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{
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u64 delta, overflow_residency, prev_residency;
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overflow_residency = BIT_ULL(32);
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/*
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* Counter wrap handling
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* Store previous hw counter values for counter wrap-around handling
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* Relying on sufficient frequency of queries otherwise counters can still wrap.
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*/
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prev_residency = gtidle->prev_residency;
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gtidle->prev_residency = cur_residency;
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/* delta */
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if (cur_residency >= prev_residency)
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delta = cur_residency - prev_residency;
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else
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delta = cur_residency + (overflow_residency - prev_residency);
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/* Add delta to extended raw driver copy of idle residency */
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cur_residency = gtidle->cur_residency + delta;
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gtidle->cur_residency = cur_residency;
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/* residency multiplier in ns, convert to ms */
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cur_residency = mul_u64_u32_div(cur_residency, gtidle->residency_multiplier, 1e6);
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return cur_residency;
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}
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static ssize_t name_show(struct device *dev,
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struct device_attribute *attr, char *buff)
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{
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struct xe_gt_idle *gtidle = dev_to_gtidle(dev);
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struct xe_guc_pc *pc = gtidle_to_pc(gtidle);
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ssize_t ret;
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xe_pm_runtime_get(pc_to_xe(pc));
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ret = sysfs_emit(buff, "%s\n", gtidle->name);
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xe_pm_runtime_put(pc_to_xe(pc));
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return ret;
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}
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static DEVICE_ATTR_RO(name);
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static ssize_t idle_status_show(struct device *dev,
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struct device_attribute *attr, char *buff)
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{
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struct xe_gt_idle *gtidle = dev_to_gtidle(dev);
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struct xe_guc_pc *pc = gtidle_to_pc(gtidle);
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enum xe_gt_idle_state state;
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xe_pm_runtime_get(pc_to_xe(pc));
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state = gtidle->idle_status(pc);
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xe_pm_runtime_put(pc_to_xe(pc));
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return sysfs_emit(buff, "%s\n", gt_idle_state_to_string(state));
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}
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static DEVICE_ATTR_RO(idle_status);
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static ssize_t idle_residency_ms_show(struct device *dev,
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struct device_attribute *attr, char *buff)
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{
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struct xe_gt_idle *gtidle = dev_to_gtidle(dev);
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struct xe_guc_pc *pc = gtidle_to_pc(gtidle);
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u64 residency;
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xe_pm_runtime_get(pc_to_xe(pc));
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residency = gtidle->idle_residency(pc);
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xe_pm_runtime_put(pc_to_xe(pc));
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return sysfs_emit(buff, "%llu\n", get_residency_ms(gtidle, residency));
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}
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static DEVICE_ATTR_RO(idle_residency_ms);
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static const struct attribute *gt_idle_attrs[] = {
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&dev_attr_name.attr,
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&dev_attr_idle_status.attr,
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&dev_attr_idle_residency_ms.attr,
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NULL,
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};
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static void gt_idle_sysfs_fini(struct drm_device *drm, void *arg)
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{
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struct kobject *kobj = arg;
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sysfs_remove_files(kobj, gt_idle_attrs);
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kobject_put(kobj);
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}
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int xe_gt_idle_sysfs_init(struct xe_gt_idle *gtidle)
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{
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struct xe_gt *gt = gtidle_to_gt(gtidle);
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struct xe_device *xe = gt_to_xe(gt);
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struct kobject *kobj;
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int err;
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kobj = kobject_create_and_add("gtidle", gt->sysfs);
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if (!kobj)
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return -ENOMEM;
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if (xe_gt_is_media_type(gt)) {
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snprintf(gtidle->name, sizeof(gtidle->name), "gt%d-mc", gt->info.id);
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gtidle->idle_residency = xe_guc_pc_mc6_residency;
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} else {
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snprintf(gtidle->name, sizeof(gtidle->name), "gt%d-rc", gt->info.id);
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gtidle->idle_residency = xe_guc_pc_rc6_residency;
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}
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/* Multiplier for Residency counter in units of 1.28us */
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gtidle->residency_multiplier = 1280;
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gtidle->idle_status = xe_guc_pc_c_status;
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err = sysfs_create_files(kobj, gt_idle_attrs);
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if (err) {
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kobject_put(kobj);
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return err;
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}
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return drmm_add_action_or_reset(&xe->drm, gt_idle_sysfs_fini, kobj);
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}
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void xe_gt_idle_enable_c6(struct xe_gt *gt)
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{
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xe_device_assert_mem_access(gt_to_xe(gt));
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xe_force_wake_assert_held(gt_to_fw(gt), XE_FW_GT);
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/* Units of 1280 ns for a total of 5s */
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xe_mmio_write32(gt, RC_IDLE_HYSTERSIS, 0x3B9ACA);
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/* Enable RC6 */
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xe_mmio_write32(gt, RC_CONTROL,
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RC_CTL_HW_ENABLE | RC_CTL_TO_MODE | RC_CTL_RC6_ENABLE);
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}
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void xe_gt_idle_disable_c6(struct xe_gt *gt)
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{
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xe_device_assert_mem_access(gt_to_xe(gt));
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xe_force_wake_assert_held(gt_to_fw(gt), XE_FORCEWAKE_ALL);
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xe_mmio_write32(gt, PG_ENABLE, 0);
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xe_mmio_write32(gt, RC_CONTROL, 0);
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xe_mmio_write32(gt, RC_STATE, 0);
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}
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