diff options
| author | Lan Xiao <Lan.Xiao@amd.com> | 2018-07-12 04:32:51 +0200 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@gmail.com> | 2018-07-12 04:32:51 +0200 |
| commit | 58e698861255129a00765b69c0499bc0d044feb4 (patch) | |
| tree | dc60a3f4a77dfcc224992c4bf0f0f9705c2fc7cd /drivers/gpu/drm/amd/amdkfd/cik_event_interrupt.c | |
| parent | drm/amdkfd: Handle VM faults in KFD (diff) | |
| download | linux-58e698861255129a00765b69c0499bc0d044feb4.tar.xz linux-58e698861255129a00765b69c0499bc0d044feb4.zip | |
drm/amdkfd: fix zero reading of VMID and PASID for Hawaii
Upon VM Fault, the VMID and PASID written by HW are zeros in
Hawaii. Instead of reading from ih_ring_entry, read directly
from the registers. This workaround fix the soft hang issues
caused by mishandled VM Fault in Hawaii.
Signed-off-by: Lan Xiao <Lan.Xiao@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/cik_event_interrupt.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/cik_event_interrupt.c | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/cik_event_interrupt.c b/drivers/gpu/drm/amd/amdkfd/cik_event_interrupt.c index cc33870e7edb..5d2475d5392c 100644 --- a/drivers/gpu/drm/amd/amdkfd/cik_event_interrupt.c +++ b/drivers/gpu/drm/amd/amdkfd/cik_event_interrupt.c @@ -25,12 +25,39 @@ #include "cik_int.h" static bool cik_event_interrupt_isr(struct kfd_dev *dev, - const uint32_t *ih_ring_entry) + const uint32_t *ih_ring_entry, + uint32_t *patched_ihre, + bool *patched_flag) { const struct cik_ih_ring_entry *ihre = (const struct cik_ih_ring_entry *)ih_ring_entry; + const struct kfd2kgd_calls *f2g = dev->kfd2kgd; unsigned int vmid, pasid; + /* This workaround is due to HW/FW limitation on Hawaii that + * VMID and PASID are not written into ih_ring_entry + */ + if ((ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT || + ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT) && + dev->device_info->asic_family == CHIP_HAWAII) { + struct cik_ih_ring_entry *tmp_ihre = + (struct cik_ih_ring_entry *)patched_ihre; + + *patched_flag = true; + *tmp_ihre = *ihre; + + vmid = f2g->read_vmid_from_vmfault_reg(dev->kgd); + pasid = f2g->get_atc_vmid_pasid_mapping_pasid(dev->kgd, vmid); + + tmp_ihre->ring_id &= 0x000000ff; + tmp_ihre->ring_id |= vmid << 8; + tmp_ihre->ring_id |= pasid << 16; + + return (pasid != 0) && + vmid >= dev->vm_info.first_vmid_kfd && + vmid <= dev->vm_info.last_vmid_kfd; + } + /* Only handle interrupts from KFD VMIDs */ vmid = (ihre->ring_id & 0x0000ff00) >> 8; if (vmid < dev->vm_info.first_vmid_kfd || |