On 3/14/2024 8:12 PM, Alex Deucher wrote:
On Thu, Mar 14, 2024 at 1:44 AM Khatri, Sunil <sukhatri@xxxxxxx> wrote:
On 3/14/2024 1:58 AM, Alex Deucher wrote:
On Tue, Mar 12, 2024 at 8:41 AM Sunil Khatri <sunil.khatri@xxxxxxx> wrote:
Add all the IP's information on a SOC to the
devcoredump.
Signed-off-by: Sunil Khatri <sunil.khatri@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
index a0dbccad2f53..611fdb90a1fc 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
@@ -196,6 +196,25 @@ amdgpu_devcoredump_read(char *buffer, loff_t offset, size_t count,
coredump->reset_task_info.process_name,
coredump->reset_task_info.pid);
+ /* GPU IP's information of the SOC */
+ if (coredump->adev) {
+ drm_printf(&p, "\nIP Information\n");
+ drm_printf(&p, "SOC Family: %d\n", coredump->adev->family);
+ drm_printf(&p, "SOC Revision id: %d\n", coredump->adev->rev_id);
+
+ for (int i = 0; i < coredump->adev->num_ip_blocks; i++) {
+ struct amdgpu_ip_block *ip =
+ &coredump->adev->ip_blocks[i];
+ drm_printf(&p, "IP type: %d IP name: %s\n",
+ ip->version->type,
+ ip->version->funcs->name);
+ drm_printf(&p, "IP version: (%d,%d,%d)\n\n",
+ ip->version->major,
+ ip->version->minor,
+ ip->version->rev);
+ }
+ }
I think the IP discovery table would be more useful. Either walk the
adev->ip_versions structure, or just include the IP discovery binary.
I did explore the adev->ip_versions and if i just go through the array
it doesn't give any useful information directly.
There are no ways to find directly from adev->ip_versions below things
until i also reparse the discovery binary again like done the discovery
amdgpu_discovery_reg_base_init and walk through the headers of various
ips using discovery binary.
a. Which IP is available on soc or not.
b. How many instances are there
Also i again have to change back to major, minor and rev convention for
this information to be useful. I am exploring it more if i find some
other information i will update.
adev->ip_block[] is derived from ip discovery only for each block which
is there on the SOC, so we are not reading information which isnt
applicable for the soc. We have name , type and version no of the IPs
available on the soc. If you want i could add no of instances of each IP
too if you think that's useful information here. Could you share what
information is missing in this approach so i can include that.
I was hoping to get the actual IP versions for the IPs from IP
discovery rather than the versions from the ip_block array. The
latter are common so you can end up with the same version used across
a wide variety of chips (e.g., all gfx10.x based chips use the same
gfx 10 IP code even if the actual IP version is different for most of
the chips).
Got it. let me check how to get it could be done rightly.
For dumping the IP discovery binary, i dont understand how that
information would be useful directly and needs to be decoded like we are
doing in discovery init. Please correct me if my understanding is wrong
here.
It's probably not a high priority, I was just thinking it might be
useful to have in case there ended up being some problem related to
the IP discovery table on some boards. E.g., we'd know that all
boards with a certain harvest config seem to align with a reported
problem. Similar for vbios. It's more for telemetry. E.g., all the
boards reporting some problem have a particular powerplay config or
whatever.
I got it.
But two points of contention here in my understanding. The dump works
only where there is reset and not sure if it could be used very early in
development of not. Second point is that devcoredump is 4096
bytes/4Kbyte of memory where we are dumping all the information. Not
sure if that could be increased but it might not be enough if we are
planning to dump all to it.
Another point is since we have sysfs/debugfs/info ioctl etc information
available. We should sort out what really is helpful in debugging GPU
hang and that's added in devcore.
Regards
Sunil
Alex
Alex
+
if (coredump->ring) {
drm_printf(&p, "\nRing timed out details\n");
drm_printf(&p, "IP Type: %d Ring Name: %s\n",
--
2.34.1
