[AMD Public Use]
<Ping>
-----Original Message-----
From: amd-gfx <amd-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Lazar, Lijo
Sent: Friday, April 16, 2021 9:51 AM
To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: Deucher, Alexander <Alexander.Deucher@xxxxxxx>; Wang, Kevin(Yang) <Kevin1.Wang@xxxxxxx>; Koenig, Christian <Christian.Koenig@xxxxxxx>; Zhang, Hawking <Hawking.Zhang@xxxxxxx>
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 <lijo.lazar@xxxxxxx>
Suggested-by: Alex Deucher <alexander.deucher@xxxxxxx>
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
Reviewed-by: Kevin Wang <kevin1.wang@xxxxxxx>
---
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
amd-gfx@xxxxxxxxxxxxxxxxxxxxx
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.freedesktop.org%2Fmailman%2Flistinfo%2Famd-gfx&data=04%7C01%7Clijo.lazar%40amd.com%7C7832088a2ca34c755be908d9008f0258%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637541436501320898%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=PxT2L7MXjlrTSk37nP1GGCcWTzSzRWbEtO5w%2BkRUbMs%3D&reserved=0
_______________________________________________
amd-gfx mailing list
amd-gfx@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
