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drm/amdkfd: Workaround PASID missing in gfx9 interrupt payload under non HWS

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This is a known gfx9 HW issue, and this change can perfectly workaround
the issue.

Signed-off-by: Yong Zhao <Yong.Zhao@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Yong Zhao 2018-10-17 12:24:02 -04:00 committed by Alex Deucher
parent 00557f4131
commit a53a11a835
1 changed files with 22 additions and 3 deletions
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25
drivers/gpu/drm/amd/amdkfd/kfd_int_process_v9.c
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@ -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.