Am 21.02.20 um 16:23 schrieb Huang Rui:
On Fri, Feb 21, 2020 at 11:18:07PM +0800, Liu, Monk wrote:
Better not use KIQ, because when you use debugfs to read register you usually hit a hang, and by that case KIQ probably already die
If CP is busy, the gfx should be in "on" state at that time, we needn't use KIQ.
Yeah, but how do you detect that? Do we have a way to wake up the CP
without asking power management to do so?
Cause the register debug interface is meant to be used when the ASIC is
completed locked up. Sending messages to the SMU is not really going to
work in that situation.
Regards,
Christian.
Thanks,
Ray
-----邮件原件-----
发件人: amd-gfx <amd-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> 代表 Huang Rui
发送时间: 2020年2月21日 22:34
收件人: StDenis, Tom <Tom.StDenis@xxxxxxx>
抄送: Alex Deucher <alexdeucher@xxxxxxxxx>; amd-gfx list <amd-gfx@xxxxxxxxxxxxxxxxxxxxx>
主题: Re: [PATCH] drm/amd/amdgpu: disable GFXOFF around debugfs access to MMIO
On Wed, Feb 19, 2020 at 10:09:46AM -0500, Tom St Denis wrote:
I got some messages after a while:
[ 741.788564] Failed to send Message 8.
[ 746.671509] Failed to send Message 8.
[ 748.749673] Failed to send Message 2b.
[ 759.245414] Failed to send Message 7.
[ 763.216902] Failed to send Message 2a.
Are there any additional locks that should be held? Because some
commands like --top or --waves can do a lot of distinct read
operations (causing a lot of enable/disable calls).
I'm going to sit on this a bit since I don't think the patch is ready
for pushing out.
How about use RREG32_KIQ and WREG32_KIQ?
Thanks,
Ray
Tom
On 2020-02-19 10:07 a.m., Alex Deucher wrote:
On Wed, Feb 19, 2020 at 10:04 AM Tom St Denis <tom.stdenis@xxxxxxx> wrote:
Signed-off-by: Tom St Denis <tom.stdenis@xxxxxxx>
Please add a patch description. With that fixed:
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
index 7379910790c9..66f763300c96 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
@@ -169,6 +169,7 @@ static int amdgpu_debugfs_process_reg_op(bool read, struct file *f,
if (pm_pg_lock)
mutex_lock(&adev->pm.mutex);
+ amdgpu_gfx_off_ctrl(adev, false);
while (size) {
uint32_t value;
@@ -192,6 +193,8 @@ static int amdgpu_debugfs_process_reg_op(bool read, struct file *f,
}
end:
+ amdgpu_gfx_off_ctrl(adev, true);
+
if (use_bank) {
amdgpu_gfx_select_se_sh(adev, 0xffffffff, 0xffffffff, 0xffffffff);
mutex_unlock(&adev->grbm_idx_mutex);
--
2.24.1
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