On 7/30/2024 12:14 PM, Sunil Khatri wrote:
> There are some problem with existing amdgpu_reset_dump_register_list
> debugfs node. It is supposed to read a list of registers but there
> could be cases when the IP is not in correct power state. Register
> read in such cases could lead to more problems.
>
> We are taking care of all such power states in devcoredump and
> dumping the registers of need for debugging. So cleaning this code
> and we dont need this functionality via debugfs anymore.
>
> Signed-off-by: Sunil Khatri <sunil.khatri@xxxxxxx>
Series is -
Reviewed-by: Lijo Lazar <lijo.lazar@xxxxxxx>
Thanks,
Lijo
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 96 ---------------------
> 1 file changed, 96 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
> index 0e1a11b6b989..cbef720de779 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
> @@ -2026,100 +2026,6 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_ib_preempt, NULL,
> DEFINE_DEBUGFS_ATTRIBUTE(fops_sclk_set, NULL,
> amdgpu_debugfs_sclk_set, "%llu\n");
>
> -static ssize_t amdgpu_reset_dump_register_list_read(struct file *f,
> - char __user *buf, size_t size, loff_t *pos)
> -{
> - struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
> - char reg_offset[12];
> - int i, ret, len = 0;
> -
> - if (*pos)
> - return 0;
> -
> - memset(reg_offset, 0, 12);
> - ret = down_read_killable(&adev->reset_domain->sem);
> - if (ret)
> - return ret;
> -
> - for (i = 0; i < adev->reset_info.num_regs; i++) {
> - sprintf(reg_offset, "0x%x\n", adev->reset_info.reset_dump_reg_list[i]);
> - up_read(&adev->reset_domain->sem);
> - if (copy_to_user(buf + len, reg_offset, strlen(reg_offset)))
> - return -EFAULT;
> -
> - len += strlen(reg_offset);
> - ret = down_read_killable(&adev->reset_domain->sem);
> - if (ret)
> - return ret;
> - }
> -
> - up_read(&adev->reset_domain->sem);
> - *pos += len;
> -
> - return len;
> -}
> -
> -static ssize_t amdgpu_reset_dump_register_list_write(struct file *f,
> - const char __user *buf, size_t size, loff_t *pos)
> -{
> - struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
> - char reg_offset[11];
> - uint32_t *new = NULL, *tmp = NULL;
> - unsigned int len = 0;
> - int ret, i = 0;
> -
> - do {
> - memset(reg_offset, 0, 11);
> - if (copy_from_user(reg_offset, buf + len,
> - min(10, (size-len)))) {
> - ret = -EFAULT;
> - goto error_free;
> - }
> -
> - new = krealloc_array(tmp, i + 1, sizeof(uint32_t), GFP_KERNEL);
> - if (!new) {
> - ret = -ENOMEM;
> - goto error_free;
> - }
> - tmp = new;
> - if (sscanf(reg_offset, "%X %n", &tmp[i], &ret) != 1) {
> - ret = -EINVAL;
> - goto error_free;
> - }
> -
> - len += ret;
> - i++;
> - } while (len < size);
> -
> - new = kmalloc_array(i, sizeof(uint32_t), GFP_KERNEL);
> - if (!new) {
> - ret = -ENOMEM;
> - goto error_free;
> - }
> - ret = down_write_killable(&adev->reset_domain->sem);
> - if (ret)
> - goto error_free;
> -
> - swap(adev->reset_info.reset_dump_reg_list, tmp);
> - swap(adev->reset_info.reset_dump_reg_value, new);
> - adev->reset_info.num_regs = i;
> - up_write(&adev->reset_domain->sem);
> - ret = size;
> -
> -error_free:
> - if (tmp != new)
> - kfree(tmp);
> - kfree(new);
> - return ret;
> -}
> -
> -static const struct file_operations amdgpu_reset_dump_register_list = {
> - .owner = THIS_MODULE,
> - .read = amdgpu_reset_dump_register_list_read,
> - .write = amdgpu_reset_dump_register_list_write,
> - .llseek = default_llseek
> -};
> -
> int amdgpu_debugfs_init(struct amdgpu_device *adev)
> {
> struct dentry *root = adev_to_drm(adev)->primary->debugfs_root;
> @@ -2204,8 +2110,6 @@ int amdgpu_debugfs_init(struct amdgpu_device *adev)
> &amdgpu_debugfs_vm_info_fops);
> debugfs_create_file("amdgpu_benchmark", 0200, root, adev,
> &amdgpu_benchmark_fops);
> - debugfs_create_file("amdgpu_reset_dump_register_list", 0644, root, adev,
> - &amdgpu_reset_dump_register_list);
>
> adev->debugfs_vbios_blob.data = adev->bios;
> adev->debugfs_vbios_blob.size = adev->bios_size;
