[AMD Public Use] Add debugfs interface to read region allocated for FW private buffer
Signed-off-by: Lijo Lazar <[email protected]> Suggested-by: Alex Deucher <[email protected]> Reviewed-by: Christian König <[email protected]> Reviewed-by: Kevin Wang <[email protected]> --- drivers/gpu/drm/amd/pm/amdgpu_pm.c | 44 ++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/drivers/gpu/drm/amd/pm/amdgpu_pm.c b/drivers/gpu/drm/amd/pm/amdgpu_pm.c index 8128603ef495..a229baa88483 100644 --- a/drivers/gpu/drm/amd/pm/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/pm/amdgpu_pm.c @@ -3526,6 +3526,45 @@ static int amdgpu_debugfs_pm_info_show(struct seq_file *m, void *unused) DEFINE_SHOW_ATTRIBUTE(amdgpu_debugfs_pm_info); +/* + * amdgpu_pm_priv_buffer_read - Read memory region allocated to FW + * + * Reads debug memory region allocated to PMFW + */ +static ssize_t amdgpu_pm_prv_buffer_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_device *adev = file_inode(f)->i_private; + const struct amd_pm_funcs *pp_funcs = adev->powerplay.pp_funcs; + void *pp_handle = adev->powerplay.pp_handle; + size_t smu_prv_buf_size; + void *smu_prv_buf; + + if (amdgpu_in_reset(adev)) + return -EPERM; + if (adev->in_suspend && !adev->in_runpm) + return -EPERM; + + if (pp_funcs && pp_funcs->get_smu_prv_buf_details) + pp_funcs->get_smu_prv_buf_details(pp_handle, &smu_prv_buf, + &smu_prv_buf_size); + else + return -ENOSYS; + + if (!smu_prv_buf || !smu_prv_buf_size) + return -EINVAL; + + return simple_read_from_buffer(buf, size, pos, smu_prv_buf, + smu_prv_buf_size); +} + +static const struct file_operations amdgpu_debugfs_pm_prv_buffer_fops = { + .owner = THIS_MODULE, + .open = simple_open, + .read = amdgpu_pm_prv_buffer_read, + .llseek = default_llseek, +}; + #endif void amdgpu_debugfs_pm_init(struct amdgpu_device *adev) @@ -3537,5 +3576,10 @@ void amdgpu_debugfs_pm_init(struct amdgpu_device *adev) debugfs_create_file("amdgpu_pm_info", 0444, root, adev, &amdgpu_debugfs_pm_info_fops); + if (adev->pm.smu_prv_buffer_size > 0) + debugfs_create_file_size("amdgpu_pm_prv_buffer", 0444, root, + adev, + &amdgpu_debugfs_pm_prv_buffer_fops, + adev->pm.smu_prv_buffer_size); #endif } -- 2.17.1 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
