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drm/amdgpu: Implement unrecoverable error message handling for VFs

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This notification may arrive in VF mailbox while polling for response from
another event.

This patches covers the following scenarios:

- If VF is already in RMA state, then do not attempt to contact the host.
  Host will ignore the VF after sending the notification.

- If the notification is detected during polling, then set the RMA status,
  and return error to caller.

- If the notification arrives by interrupt, then set the RMA status and
  queue a reset.  This reset will fail and VF will stop runtime services.

Reviewed-by: Shravan Kumar Gande <Shravankumar.Gande@amd.com>
Signed-off-by: Victor Skvortsov <victor.skvortsov@amd.com>
Signed-off-by: Ellen Pan <yunru.pan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Ellen Pan
2025-04-29 17:18:44 -04:00
committed by Alex Deucher
parent 6be34e1d1f
commit 086809c82c
5 changed files with 52 additions and 6 deletions
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34
drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c
View File

@@ -67,6 +67,8 @@ static int xgpu_nv_mailbox_rcv_msg(struct amdgpu_device *adev,
reg = RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW0);
if (reg == IDH_FAIL)
r = -EINVAL;
if (reg == IDH_UNRECOV_ERR_NOTIFICATION)
r = -ENODEV;
else if (reg != event)
return -ENOENT;
@@ -103,6 +105,7 @@ static int xgpu_nv_poll_msg(struct amdgpu_device *adev, enum idh_event event)
{
int r;
uint64_t timeout, now;
struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
now = (uint64_t)ktime_to_ms(ktime_get());
timeout = now + NV_MAILBOX_POLL_MSG_TIMEDOUT;
@@ -110,8 +113,16 @@ static int xgpu_nv_poll_msg(struct amdgpu_device *adev, enum idh_event event)
do {
r = xgpu_nv_mailbox_rcv_msg(adev, event);
if (!r) {
dev_dbg(adev->dev, "rcv_msg 0x%x after %llu ms\n", event, NV_MAILBOX_POLL_MSG_TIMEDOUT - timeout + now);
dev_dbg(adev->dev, "rcv_msg 0x%x after %llu ms\n",
event, NV_MAILBOX_POLL_MSG_TIMEDOUT - timeout + now);
return 0;
} else if (r == -ENODEV) {
if (!amdgpu_ras_is_rma(adev)) {
ras->is_rma = true;
dev_err(adev->dev, "VF is in an unrecoverable state. "
"Runtime Services are halted.\n");
}
return r;
}
msleep(10);
@@ -166,6 +177,10 @@ static int xgpu_nv_send_access_requests_with_param(struct amdgpu_device *adev,
enum idh_event event = -1;
send_request:
if (amdgpu_ras_is_rma(adev))
return -ENODEV;
xgpu_nv_mailbox_trans_msg(adev, req, data1, data2, data3);
switch (req) {
@@ -323,6 +338,7 @@ static void xgpu_nv_mailbox_flr_work(struct work_struct *work)
{
struct amdgpu_virt *virt = container_of(work, struct amdgpu_virt, flr_work);
struct amdgpu_device *adev = container_of(virt, struct amdgpu_device, virt);
struct amdgpu_reset_context reset_context = { 0 };
amdgpu_virt_fini_data_exchange(adev);
@@ -333,8 +349,6 @@ static void xgpu_nv_mailbox_flr_work(struct work_struct *work)
adev->gfx_timeout == MAX_SCHEDULE_TIMEOUT ||
adev->compute_timeout == MAX_SCHEDULE_TIMEOUT ||
adev->video_timeout == MAX_SCHEDULE_TIMEOUT)) {
struct amdgpu_reset_context reset_context;
memset(&reset_context, 0, sizeof(reset_context));
reset_context.method = AMD_RESET_METHOD_NONE;
reset_context.reset_req_dev = adev;
@@ -380,6 +394,7 @@ static int xgpu_nv_mailbox_rcv_irq(struct amdgpu_device *adev,
struct amdgpu_iv_entry *entry)
{
enum idh_event event = xgpu_nv_mailbox_peek_msg(adev);
struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
switch (event) {
case IDH_RAS_BAD_PAGES_NOTIFICATION:
@@ -387,6 +402,19 @@ static int xgpu_nv_mailbox_rcv_irq(struct amdgpu_device *adev,
if (amdgpu_sriov_runtime(adev))
schedule_work(&adev->virt.bad_pages_work);
break;
case IDH_UNRECOV_ERR_NOTIFICATION:
xgpu_nv_mailbox_send_ack(adev);
if (!amdgpu_ras_is_rma(adev)) {
ras->is_rma = true;
dev_err(adev->dev, "VF is in an unrecoverable state. Runtime Services are halted.\n");
}
if (amdgpu_sriov_runtime(adev))
WARN_ONCE(!amdgpu_reset_domain_schedule(adev->reset_domain,
&adev->virt.flr_work),
"Failed to queue work! at %s",
__func__);
break;
case IDH_FLR_NOTIFICATION:
if (amdgpu_sriov_runtime(adev))
WARN_ONCE(!amdgpu_reset_domain_schedule(adev->reset_domain,