| // SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note |
| /* |
| * |
| * (C) COPYRIGHT 2020-2021 ARM Limited. All rights reserved. |
| * |
| * This program is free software and is provided to you under the terms of the |
| * GNU General Public License version 2 as published by the Free Software |
| * Foundation, and any use by you of this program is subject to the terms |
| * of such GNU license. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, you can access it online at |
| * http://www.gnu.org/licenses/gpl-2.0.html. |
| * |
| */ |
| |
| #include <mali_kbase.h> |
| #include <gpu/mali_kbase_gpu_fault.h> |
| #include <backend/gpu/mali_kbase_instr_internal.h> |
| #include <backend/gpu/mali_kbase_pm_internal.h> |
| #include <device/mali_kbase_device.h> |
| #include <mali_kbase_reset_gpu.h> |
| #include <mmu/mali_kbase_mmu.h> |
| |
| /** |
| * kbase_report_gpu_fault - Report a GPU fault. |
| * @kbdev: Kbase device pointer |
| * @multiple: Zero if only GPU_FAULT was raised, non-zero if MULTIPLE_GPU_FAULTS |
| * was also set |
| * |
| * This function is called from the interrupt handler when a GPU fault occurs. |
| * It reports the details of the fault using dev_warn(). |
| */ |
| static void kbase_report_gpu_fault(struct kbase_device *kbdev, int multiple) |
| { |
| u32 status = kbase_reg_read(kbdev, GPU_CONTROL_REG(GPU_FAULTSTATUS)); |
| u64 address = (u64) kbase_reg_read(kbdev, |
| GPU_CONTROL_REG(GPU_FAULTADDRESS_HI)) << 32; |
| |
| address |= kbase_reg_read(kbdev, |
| GPU_CONTROL_REG(GPU_FAULTADDRESS_LO)); |
| meson_gpu_fault ++; |
| dev_warn(kbdev->dev, "GPU Fault 0x%08x (%s) at 0x%016llx", |
| status, |
| kbase_gpu_exception_name(status & 0xFF), |
| address); |
| if (multiple) |
| dev_warn(kbdev->dev, "There were multiple GPU faults - some have not been reported\n"); |
| } |
| |
| void kbase_gpu_interrupt(struct kbase_device *kbdev, u32 val) |
| { |
| KBASE_KTRACE_ADD(kbdev, CORE_GPU_IRQ, NULL, val); |
| if (val & GPU_FAULT) |
| kbase_report_gpu_fault(kbdev, val & MULTIPLE_GPU_FAULTS); |
| |
| if (val & RESET_COMPLETED) |
| kbase_pm_reset_done(kbdev); |
| |
| if (val & PRFCNT_SAMPLE_COMPLETED) |
| kbase_instr_hwcnt_sample_done(kbdev); |
| |
| KBASE_KTRACE_ADD(kbdev, CORE_GPU_IRQ_CLEAR, NULL, val); |
| kbase_reg_write(kbdev, GPU_CONTROL_REG(GPU_IRQ_CLEAR), val); |
| |
| /* kbase_pm_check_transitions (called by kbase_pm_power_changed) must |
| * be called after the IRQ has been cleared. This is because it might |
| * trigger further power transitions and we don't want to miss the |
| * interrupt raised to notify us that these further transitions have |
| * finished. The same applies to kbase_clean_caches_done() - if another |
| * clean was queued, it might trigger another clean, which might |
| * generate another interrupt which shouldn't be missed. |
| */ |
| |
| if (val & CLEAN_CACHES_COMPLETED) |
| kbase_clean_caches_done(kbdev); |
| |
| if (val & POWER_CHANGED_ALL) { |
| kbase_pm_power_changed(kbdev); |
| } else if (val & CLEAN_CACHES_COMPLETED) { |
| /* If cache line evict messages can be lost when shader cores |
| * power down then we need to flush the L2 cache before powering |
| * down cores. When the flush completes, the shaders' state |
| * machine needs to be re-invoked to proceed with powering down |
| * cores. |
| */ |
| if (kbdev->pm.backend.l2_always_on || |
| kbase_hw_has_issue(kbdev, BASE_HW_ISSUE_TTRX_921)) |
| kbase_pm_power_changed(kbdev); |
| } |
| |
| KBASE_KTRACE_ADD(kbdev, CORE_GPU_IRQ_DONE, NULL, val); |
| } |