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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" [AMD Public Use] -----Original Message----- From: amd-gfx On Behalf Of Lazar, L= ijo Sent: Friday, April 16, 2021 9:51 AM To: amd-gfx@lists.freedesktop.org Cc: Deucher, Alexander ; Wang, Kevin(Yang) ; Koenig, Christian ; Zhang, Hawk= ing Subject: [PATCH v3 2/2] drm/amd/pm: Add debugfs node to read private buffer [AMD Public Use] Add debugfs interface to read region allocated for FW private buffer Signed-off-by: Lijo Lazar Suggested-by: Alex Deucher Reviewed-by: Christian K=F6nig Reviewed-by: Kevin Wang --- 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/am= dgpu_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_fi= le *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 =3D file_inode(f)->i_private; + const struct amd_pm_funcs *pp_funcs =3D adev->powerplay.pp_funcs; + void *pp_handle =3D 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 =3D { + .owner =3D THIS_MODULE, + .open =3D simple_open, + .read =3D amdgpu_pm_prv_buffer_read, + .llseek =3D default_llseek, +}; + #endif = void amdgpu_debugfs_pm_init(struct amdgpu_device *adev) @@ -3537,5 +3576,1= 0 @@ 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 amd-gfx@lists.freedesktop.org https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Flists.f= reedesktop.org%2Fmailman%2Flistinfo%2Famd-gfx&data=3D04%7C01%7Clijo.laz= ar%40amd.com%7C7832088a2ca34c755be908d9008f0258%7C3dd8961fe4884e608e11a82d9= 94e183d%7C0%7C0%7C637541436501320898%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLj= AwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3DPxT= 2L7MXjlrTSk37nP1GGCcWTzSzRWbEtO5w%2BkRUbMs%3D&reserved=3D0 _______________________________________________ amd-gfx mailing list amd-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/amd-gfx