| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * |
| * (C) COPYRIGHT 2010-2020 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 licence. |
| * |
| * 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. |
| * |
| * SPDX-License-Identifier: GPL-2.0 |
| * |
| */ |
| |
| |
| |
| /* |
| * Base kernel device APIs |
| */ |
| |
| #include <linux/debugfs.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/seq_file.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/of_platform.h> |
| #include <linux/types.h> |
| |
| #include <mali_kbase.h> |
| #include <mali_kbase_defs.h> |
| #include <mali_kbase_hwaccess_instr.h> |
| #include <mali_kbase_hw.h> |
| #include <mali_kbase_config_defaults.h> |
| |
| #include <tl/mali_kbase_timeline.h> |
| #include "mali_kbase_vinstr.h" |
| #include "mali_kbase_hwcnt_context.h" |
| #include "mali_kbase_hwcnt_virtualizer.h" |
| |
| #include "mali_kbase_device.h" |
| #include "mali_kbase_device_internal.h" |
| #include "backend/gpu/mali_kbase_pm_internal.h" |
| #include "backend/gpu/mali_kbase_irq_internal.h" |
| |
| #ifdef CONFIG_MALI_ARBITER_SUPPORT |
| #include "arbiter/mali_kbase_arbiter_pm.h" |
| #endif /* CONFIG_MALI_ARBITER_SUPPORT */ |
| |
| /* NOTE: Magic - 0x45435254 (TRCE in ASCII). |
| * Supports tracing feature provided in the base module. |
| * Please keep it in sync with the value of base module. |
| */ |
| #define TRACE_BUFFER_HEADER_SPECIAL 0x45435254 |
| |
| /* Number of register accesses for the buffer that we allocate during |
| * initialization time. The buffer size can be changed later via debugfs. |
| */ |
| #define KBASEP_DEFAULT_REGISTER_HISTORY_SIZE ((u16)512) |
| |
| static DEFINE_MUTEX(kbase_dev_list_lock); |
| static LIST_HEAD(kbase_dev_list); |
| static int kbase_dev_nr; |
| |
| struct kbase_device *kbase_device_alloc(void) |
| { |
| return kzalloc(sizeof(struct kbase_device), GFP_KERNEL); |
| } |
| |
| static int kbase_device_as_init(struct kbase_device *kbdev, int i) |
| { |
| kbdev->as[i].number = i; |
| kbdev->as[i].bf_data.addr = 0ULL; |
| kbdev->as[i].pf_data.addr = 0ULL; |
| |
| kbdev->as[i].pf_wq = alloc_workqueue("mali_mmu%d", 0, 1, i); |
| if (!kbdev->as[i].pf_wq) |
| return -EINVAL; |
| |
| INIT_WORK(&kbdev->as[i].work_pagefault, page_fault_worker); |
| INIT_WORK(&kbdev->as[i].work_busfault, bus_fault_worker); |
| |
| return 0; |
| } |
| |
| static void kbase_device_as_term(struct kbase_device *kbdev, int i) |
| { |
| destroy_workqueue(kbdev->as[i].pf_wq); |
| } |
| |
| static int kbase_device_all_as_init(struct kbase_device *kbdev) |
| { |
| int i, err; |
| |
| for (i = 0; i < kbdev->nr_hw_address_spaces; i++) { |
| err = kbase_device_as_init(kbdev, i); |
| if (err) |
| goto free_workqs; |
| } |
| |
| return 0; |
| |
| free_workqs: |
| for (; i > 0; i--) |
| kbase_device_as_term(kbdev, i); |
| |
| return err; |
| } |
| |
| static void kbase_device_all_as_term(struct kbase_device *kbdev) |
| { |
| int i; |
| |
| for (i = 0; i < kbdev->nr_hw_address_spaces; i++) |
| kbase_device_as_term(kbdev, i); |
| } |
| |
| int kbase_device_misc_init(struct kbase_device * const kbdev) |
| { |
| int err; |
| #ifdef CONFIG_ARM64 |
| struct device_node *np = NULL; |
| #endif /* CONFIG_ARM64 */ |
| |
| spin_lock_init(&kbdev->mmu_mask_change); |
| mutex_init(&kbdev->mmu_hw_mutex); |
| #ifdef CONFIG_ARM64 |
| kbdev->cci_snoop_enabled = false; |
| np = kbdev->dev->of_node; |
| if (np != NULL) { |
| if (of_property_read_u32(np, "snoop_enable_smc", |
| &kbdev->snoop_enable_smc)) |
| kbdev->snoop_enable_smc = 0; |
| if (of_property_read_u32(np, "snoop_disable_smc", |
| &kbdev->snoop_disable_smc)) |
| kbdev->snoop_disable_smc = 0; |
| /* Either both or none of the calls should be provided. */ |
| if (!((kbdev->snoop_disable_smc == 0 |
| && kbdev->snoop_enable_smc == 0) |
| || (kbdev->snoop_disable_smc != 0 |
| && kbdev->snoop_enable_smc != 0))) { |
| WARN_ON(1); |
| err = -EINVAL; |
| goto fail; |
| } |
| } |
| #endif /* CONFIG_ARM64 */ |
| /* Get the list of workarounds for issues on the current HW |
| * (identified by the GPU_ID register) |
| */ |
| err = kbase_hw_set_issues_mask(kbdev); |
| if (err) |
| goto fail; |
| |
| /* Set the list of features available on the current HW |
| * (identified by the GPU_ID register) |
| */ |
| kbase_hw_set_features_mask(kbdev); |
| |
| err = kbase_gpuprops_set_features(kbdev); |
| if (err) |
| goto fail; |
| |
| /* On Linux 4.0+, dma coherency is determined from device tree */ |
| #if defined(CONFIG_ARM64) && LINUX_VERSION_CODE < KERNEL_VERSION(4, 0, 0) |
| set_dma_ops(kbdev->dev, &noncoherent_swiotlb_dma_ops); |
| #endif |
| |
| /* Workaround a pre-3.13 Linux issue, where dma_mask is NULL when our |
| * device structure was created by device-tree |
| */ |
| if (!kbdev->dev->dma_mask) |
| kbdev->dev->dma_mask = &kbdev->dev->coherent_dma_mask; |
| |
| err = dma_set_mask(kbdev->dev, |
| DMA_BIT_MASK(kbdev->gpu_props.mmu.pa_bits)); |
| if (err) |
| goto dma_set_mask_failed; |
| |
| err = dma_set_coherent_mask(kbdev->dev, |
| DMA_BIT_MASK(kbdev->gpu_props.mmu.pa_bits)); |
| if (err) |
| goto dma_set_mask_failed; |
| |
| kbdev->nr_hw_address_spaces = kbdev->gpu_props.num_address_spaces; |
| |
| err = kbase_device_all_as_init(kbdev); |
| if (err) |
| goto as_init_failed; |
| |
| spin_lock_init(&kbdev->hwcnt.lock); |
| |
| err = kbase_ktrace_init(kbdev); |
| if (err) |
| goto term_as; |
| |
| init_waitqueue_head(&kbdev->cache_clean_wait); |
| |
| kbase_debug_assert_register_hook(&kbase_ktrace_hook_wrapper, kbdev); |
| |
| atomic_set(&kbdev->ctx_num, 0); |
| |
| err = kbase_instr_backend_init(kbdev); |
| if (err) |
| goto term_trace; |
| |
| kbdev->pm.dvfs_period = DEFAULT_PM_DVFS_PERIOD; |
| |
| kbdev->reset_timeout_ms = DEFAULT_RESET_TIMEOUT_MS; |
| |
| if (kbase_hw_has_feature(kbdev, BASE_HW_FEATURE_AARCH64_MMU)) |
| kbdev->mmu_mode = kbase_mmu_mode_get_aarch64(); |
| else |
| kbdev->mmu_mode = kbase_mmu_mode_get_lpae(); |
| |
| mutex_init(&kbdev->kctx_list_lock); |
| INIT_LIST_HEAD(&kbdev->kctx_list); |
| |
| spin_lock_init(&kbdev->hwaccess_lock); |
| |
| return 0; |
| term_trace: |
| kbase_ktrace_term(kbdev); |
| term_as: |
| kbase_device_all_as_term(kbdev); |
| as_init_failed: |
| dma_set_mask_failed: |
| fail: |
| return err; |
| } |
| |
| void kbase_device_misc_term(struct kbase_device *kbdev) |
| { |
| KBASE_DEBUG_ASSERT(kbdev); |
| |
| WARN_ON(!list_empty(&kbdev->kctx_list)); |
| |
| #if KBASE_KTRACE_ENABLE |
| kbase_debug_assert_register_hook(NULL, NULL); |
| #endif |
| |
| kbase_instr_backend_term(kbdev); |
| |
| kbase_ktrace_term(kbdev); |
| |
| kbase_device_all_as_term(kbdev); |
| } |
| |
| void kbase_device_free(struct kbase_device *kbdev) |
| { |
| kfree(kbdev); |
| } |
| |
| void kbase_device_id_init(struct kbase_device *kbdev) |
| { |
| scnprintf(kbdev->devname, DEVNAME_SIZE, "%s%d", kbase_drv_name, |
| kbase_dev_nr); |
| kbdev->id = kbase_dev_nr; |
| } |
| |
| void kbase_increment_device_id(void) |
| { |
| kbase_dev_nr++; |
| } |
| |
| int kbase_device_hwcnt_backend_gpu_init(struct kbase_device *kbdev) |
| { |
| return kbase_hwcnt_backend_gpu_create(kbdev, &kbdev->hwcnt_gpu_iface); |
| } |
| |
| void kbase_device_hwcnt_backend_gpu_term(struct kbase_device *kbdev) |
| { |
| kbase_hwcnt_backend_gpu_destroy(&kbdev->hwcnt_gpu_iface); |
| } |
| |
| int kbase_device_hwcnt_context_init(struct kbase_device *kbdev) |
| { |
| return kbase_hwcnt_context_init(&kbdev->hwcnt_gpu_iface, |
| &kbdev->hwcnt_gpu_ctx); |
| } |
| |
| void kbase_device_hwcnt_context_term(struct kbase_device *kbdev) |
| { |
| kbase_hwcnt_context_term(kbdev->hwcnt_gpu_ctx); |
| } |
| |
| int kbase_device_hwcnt_virtualizer_init(struct kbase_device *kbdev) |
| { |
| return kbase_hwcnt_virtualizer_init(kbdev->hwcnt_gpu_ctx, |
| KBASE_HWCNT_GPU_VIRTUALIZER_DUMP_THRESHOLD_NS, |
| &kbdev->hwcnt_gpu_virt); |
| } |
| |
| void kbase_device_hwcnt_virtualizer_term(struct kbase_device *kbdev) |
| { |
| kbase_hwcnt_virtualizer_term(kbdev->hwcnt_gpu_virt); |
| } |
| |
| int kbase_device_timeline_init(struct kbase_device *kbdev) |
| { |
| atomic_set(&kbdev->timeline_flags, 0); |
| return kbase_timeline_init(&kbdev->timeline, &kbdev->timeline_flags); |
| } |
| |
| void kbase_device_timeline_term(struct kbase_device *kbdev) |
| { |
| kbase_timeline_term(kbdev->timeline); |
| } |
| |
| int kbase_device_vinstr_init(struct kbase_device *kbdev) |
| { |
| return kbase_vinstr_init(kbdev->hwcnt_gpu_virt, &kbdev->vinstr_ctx); |
| } |
| |
| void kbase_device_vinstr_term(struct kbase_device *kbdev) |
| { |
| kbase_vinstr_term(kbdev->vinstr_ctx); |
| } |
| |
| int kbase_device_io_history_init(struct kbase_device *kbdev) |
| { |
| return kbase_io_history_init(&kbdev->io_history, |
| KBASEP_DEFAULT_REGISTER_HISTORY_SIZE); |
| } |
| |
| void kbase_device_io_history_term(struct kbase_device *kbdev) |
| { |
| kbase_io_history_term(&kbdev->io_history); |
| } |
| |
| int kbase_device_misc_register(struct kbase_device *kbdev) |
| { |
| return misc_register(&kbdev->mdev); |
| } |
| |
| void kbase_device_misc_deregister(struct kbase_device *kbdev) |
| { |
| misc_deregister(&kbdev->mdev); |
| } |
| |
| int kbase_device_list_init(struct kbase_device *kbdev) |
| { |
| const struct list_head *dev_list; |
| |
| dev_list = kbase_device_get_list(); |
| list_add(&kbdev->entry, &kbase_dev_list); |
| kbase_device_put_list(dev_list); |
| |
| return 0; |
| } |
| |
| void kbase_device_list_term(struct kbase_device *kbdev) |
| { |
| const struct list_head *dev_list; |
| |
| dev_list = kbase_device_get_list(); |
| list_del(&kbdev->entry); |
| kbase_device_put_list(dev_list); |
| } |
| |
| const struct list_head *kbase_device_get_list(void) |
| { |
| mutex_lock(&kbase_dev_list_lock); |
| return &kbase_dev_list; |
| } |
| KBASE_EXPORT_TEST_API(kbase_device_get_list); |
| |
| void kbase_device_put_list(const struct list_head *dev_list) |
| { |
| mutex_unlock(&kbase_dev_list_lock); |
| } |
| KBASE_EXPORT_TEST_API(kbase_device_put_list); |
| |
| int kbase_device_early_init(struct kbase_device *kbdev) |
| { |
| int err; |
| |
| err = kbasep_platform_device_init(kbdev); |
| if (err) |
| return err; |
| |
| err = kbase_pm_runtime_init(kbdev); |
| if (err) |
| goto fail_runtime_pm; |
| |
| /* Ensure we can access the GPU registers */ |
| kbase_pm_register_access_enable(kbdev); |
| |
| /* Find out GPU properties based on the GPU feature registers */ |
| kbase_gpuprops_set(kbdev); |
| |
| /* We're done accessing the GPU registers for now. */ |
| kbase_pm_register_access_disable(kbdev); |
| |
| err = kbase_install_interrupts(kbdev); |
| if (err) |
| goto fail_interrupts; |
| |
| return 0; |
| |
| fail_interrupts: |
| kbase_pm_runtime_term(kbdev); |
| fail_runtime_pm: |
| kbasep_platform_device_term(kbdev); |
| |
| return err; |
| } |
| |
| void kbase_device_early_term(struct kbase_device *kbdev) |
| { |
| #ifdef CONFIG_MALI_ARBITER_SUPPORT |
| if (kbdev->arb.arb_if) |
| kbase_arbiter_pm_release_interrupts(kbdev); |
| else |
| kbase_release_interrupts(kbdev); |
| #else |
| kbase_release_interrupts(kbdev); |
| #endif /* CONFIG_MALI_ARBITER_SUPPORT */ |
| kbase_pm_runtime_term(kbdev); |
| kbasep_platform_device_term(kbdev); |
| } |