[PATCH 1/4] drm/amdkfd: refine event_interrupt_poison_consumption

[Zhang, Hawking]

[AMD Official Use Only]

+       pr_warn("RAS poison consumption handling\n");

Given you already print out this, might be better add some more information to help identify which blocks issued this poison consumption interrupt. e.g. add client_id or source_id

Regards,
Hawking

-----Original Message-----
From: Zhou1, Tao <Tao.Zhou1 at amd.com>
Sent: Wednesday, March 16, 2022 17:26
To: amd-gfx at lists.freedesktop.org; Zhang, Hawking <Hawking.Zhang at amd.com>; Kuehling, Felix <Felix.Kuehling at amd.com>; Yang, Stanley <Stanley.Yang at amd.com>; Chai, Thomas <YiPeng.Chai at amd.com>
Cc: Zhou1, Tao <Tao.Zhou1 at amd.com>
Subject: [PATCH 1/4] drm/amdkfd: refine event_interrupt_poison_consumption

Combine reading and setting poison flag as one atomic operation and add print message for the function.

Signed-off-by: Tao Zhou <tao.zhou1 at amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_int_process_v9.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_int_process_v9.c b/drivers/gpu/drm/amd/amdkfd/kfd_int_process_v9.c
index 7eedbcd14828..a992798ff8b6 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_int_process_v9.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_int_process_v9.c
@@ -93,20 +93,19 @@ enum SQ_INTERRUPT_ERROR_TYPE {  static void event_interrupt_poison_consumption(struct kfd_dev *dev,
                                uint16_t pasid, uint16_t source_id)  {
-       int ret = -EINVAL;
+       int old_poison, ret = -EINVAL;
        struct kfd_process *p = kfd_lookup_process_by_pasid(pasid);

        if (!p)
                return;

        /* all queues of a process will be unmapped in one time */
-       if (atomic_read(&p->poison)) {
-               kfd_unref_process(p);
+       old_poison = atomic_cmpxchg(&p->poison, 0, 1);
+       kfd_unref_process(p);
+       if (old_poison)
                return;
-       }

-       atomic_set(&p->poison, 1);
-       kfd_unref_process(p);
+       pr_warn("RAS poison consumption handling\n");

        switch (source_id) {
        case SOC15_INTSRC_SQ_INTERRUPT_MSG:
--
2.35.1