diff options
Diffstat (limited to 'mali_kbase/mali_kbase_pbha_debugfs.c')
| -rw-r--r-- | mali_kbase/mali_kbase_pbha_debugfs.c | 103 |
1 files changed, 95 insertions, 8 deletions
diff --git a/mali_kbase/mali_kbase_pbha_debugfs.c b/mali_kbase/mali_kbase_pbha_debugfs.c index 47eab63..1cc29c7 100644 --- a/mali_kbase/mali_kbase_pbha_debugfs.c +++ b/mali_kbase/mali_kbase_pbha_debugfs.c @@ -1,7 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note /* * - * (C) COPYRIGHT 2021 ARM Limited. All rights reserved. + * (C) COPYRIGHT 2021-2022 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 @@ -20,13 +20,15 @@ */ #include "mali_kbase_pbha_debugfs.h" - #include "mali_kbase_pbha.h" - #include <device/mali_kbase_device.h> #include <mali_kbase_reset_gpu.h> #include <mali_kbase.h> +#if MALI_USE_CSF +#include "backend/gpu/mali_kbase_pm_internal.h" +#endif + static int int_id_overrides_show(struct seq_file *sfile, void *data) { struct kbase_device *kbdev = sfile->private; @@ -108,6 +110,90 @@ static int int_id_overrides_open(struct inode *in, struct file *file) return single_open(file, int_id_overrides_show, in->i_private); } +#if MALI_USE_CSF +/** + * propagate_bits_show - Read PBHA bits from L2_CONFIG out to debugfs. + * + * @sfile: The debugfs entry. + * @data: Data associated with the entry. + * + * Return: 0 in all cases. + */ +static int propagate_bits_show(struct seq_file *sfile, void *data) +{ + struct kbase_device *kbdev = sfile->private; + u32 l2_config_val; + + kbase_csf_scheduler_pm_active(kbdev); + kbase_pm_wait_for_l2_powered(kbdev); + l2_config_val = L2_CONFIG_PBHA_HWU_GET(kbase_reg_read(kbdev, GPU_CONTROL_REG(L2_CONFIG))); + kbase_csf_scheduler_pm_idle(kbdev); + + seq_printf(sfile, "PBHA Propagate Bits: 0x%x\n", l2_config_val); + return 0; +} + +static int propagate_bits_open(struct inode *in, struct file *file) +{ + return single_open(file, propagate_bits_show, in->i_private); +} + +/** + * propagate_bits_write - Write input value from debugfs to PBHA bits of L2_CONFIG register. + * + * @file: Pointer to file struct of debugfs node. + * @ubuf: Pointer to user buffer with value to be written. + * @count: Size of user buffer. + * @ppos: Not used. + * + * Return: Size of buffer passed in when successful, but error code E2BIG/EINVAL otherwise. + */ +static ssize_t propagate_bits_write(struct file *file, const char __user *ubuf, size_t count, + loff_t *ppos) +{ + struct seq_file *sfile = file->private_data; + struct kbase_device *kbdev = sfile->private; + /* 32 characters should be enough for the input string in any base */ + char raw_str[32]; + unsigned long propagate_bits; + + if (count >= sizeof(raw_str)) + return -E2BIG; + if (copy_from_user(raw_str, ubuf, count)) + return -EINVAL; + raw_str[count] = '\0'; + if (kstrtoul(raw_str, 0, &propagate_bits)) + return -EINVAL; + + /* Check propagate_bits input argument does not + * exceed the maximum size of the propagate_bits mask. + */ + if (propagate_bits > (L2_CONFIG_PBHA_HWU_MASK >> L2_CONFIG_PBHA_HWU_SHIFT)) + return -EINVAL; + /* Cast to u8 is safe as check is done already to ensure size is within + * correct limits. + */ + kbdev->pbha_propagate_bits = (u8)propagate_bits; + + /* GPU Reset will set new values in L2 config */ + if (kbase_prepare_to_reset_gpu(kbdev, RESET_FLAGS_NONE)) { + kbase_reset_gpu(kbdev); + kbase_reset_gpu_wait(kbdev); + } + + return count; +} + +static const struct file_operations pbha_propagate_bits_fops = { + .owner = THIS_MODULE, + .open = propagate_bits_open, + .read = seq_read, + .write = propagate_bits_write, + .llseek = seq_lseek, + .release = single_release, +}; +#endif /* MALI_USE_CSF */ + static const struct file_operations pbha_int_id_overrides_fops = { .owner = THIS_MODULE, .open = int_id_overrides_open, @@ -120,14 +206,10 @@ static const struct file_operations pbha_int_id_overrides_fops = { void kbase_pbha_debugfs_init(struct kbase_device *kbdev) { if (kbasep_pbha_supported(kbdev)) { -#if (KERNEL_VERSION(4, 7, 0) <= LINUX_VERSION_CODE) - /* only for newer kernel version debug file system is safe */ const mode_t mode = 0644; -#else - const mode_t mode = 0600; -#endif struct dentry *debugfs_pbha_dir = debugfs_create_dir( "pbha", kbdev->mali_debugfs_directory); + if (IS_ERR_OR_NULL(debugfs_pbha_dir)) { dev_err(kbdev->dev, "Couldn't create mali debugfs page-based hardware attributes directory\n"); @@ -136,5 +218,10 @@ void kbase_pbha_debugfs_init(struct kbase_device *kbdev) debugfs_create_file("int_id_overrides", mode, debugfs_pbha_dir, kbdev, &pbha_int_id_overrides_fops); +#if MALI_USE_CSF + if (kbase_hw_has_feature(kbdev, BASE_HW_FEATURE_PBHA_HWU)) + debugfs_create_file("propagate_bits", mode, debugfs_pbha_dir, kbdev, + &pbha_propagate_bits_fops); +#endif /* MALI_USE_CSF */ } } |