From: Yong Zhao <Yong.Zhao@xxxxxxx>
This is a known gfx9 HW issue, and this change can perfectly workaround
the issue.
Signed-off-by: Yong Zhao <Yong.Zhao@xxxxxxx>
Reviewed-by: Felix Kuehling <Felix.Kuehling@xxxxxxx>
Signed-off-by: Felix Kuehling <Felix.Kuehling@xxxxxxx>
---
drivers/gpu/drm/amd/amdkfd/kfd_int_process_v9.c | 25 ++++++++++++++++++++++---
1 file changed, 22 insertions(+), 3 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 8497864..a85904a 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_int_process_v9.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_int_process_v9.c
@@ -23,7 +23,7 @@
#include "kfd_priv.h"
#include "kfd_events.h"
#include "soc15_int.h"
-
+#include "kfd_device_queue_manager.h"
static bool event_interrupt_isr_v9(struct kfd_dev *dev,
const uint32_t *ih_ring_entry,
@@ -43,14 +43,33 @@ static bool event_interrupt_isr_v9(struct kfd_dev *dev,
client_id = SOC15_CLIENT_ID_FROM_IH_ENTRY(ih_ring_entry);
pasid = SOC15_PASID_FROM_IH_ENTRY(ih_ring_entry);
+ /* This is a known issue for gfx9. Under non HWS, pasid is not set
+ * in the interrupt payload, so we need to find out the pasid on our
+ * own.
+ */
+ if (!pasid && dev->dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS) {
+ const uint32_t pasid_mask = 0xffff;
+
+ *patched_flag = true;
+ memcpy(patched_ihre, ih_ring_entry,
+ dev->device_info->ih_ring_entry_size);
+
+ pasid = dev->kfd2kgd->get_atc_vmid_pasid_mapping_pasid(
+ dev->kgd, vmid);
+
+ /* Patch the pasid field */
+ patched_ihre[3] = cpu_to_le32((le32_to_cpu(patched_ihre[3])
+ & ~pasid_mask) | pasid);
+ }
+
pr_debug("client id 0x%x, source id %d, vmid %d, pasid 0x%x. raw data:\n",
client_id, source_id, vmid, pasid);
pr_debug("%8X, %8X, %8X, %8X, %8X, %8X, %8X, %8X.\n",
data[0], data[1], data[2], data[3],
data[4], data[5], data[6], data[7]);
- /* If there is no valid PASID, it's likely a firmware bug */
- if (WARN_ONCE(pasid == 0, "FW bug: No PASID in KFD interrupt"))
+ /* If there is no valid PASID, it's likely a bug */
+ if (WARN_ONCE(pasid == 0, "Bug: No PASID in KFD interrupt"))
return 0;
/* Interrupt types we care about: various signals and faults.
--
2.7.4
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