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| author | Lan Xiao <Lan.Xiao@amd.com> | 2018-07-11 22:32:51 -0400 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@gmail.com> | 2018-07-11 22:32:51 -0400 |
| commit | 58e698861255129a00765b69c0499bc0d044feb4 (patch) | |
| tree | dc60a3f4a77dfcc224992c4bf0f0f9705c2fc7cd /drivers/gpu/drm/amd/include | |
| parent | 2640c3facbd6e21e63c95f19588cc24913a263cd (diff) | |
| download | linux-58e698861255129a00765b69c0499bc0d044feb4.tar.bz2 | |
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/include')
| -rw-r--r-- | drivers/gpu/drm/amd/include/kgd_kfd_interface.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/include/kgd_kfd_interface.h b/drivers/gpu/drm/amd/include/kgd_kfd_interface.h index 28b11d105288..76a30cbeee19 100644 --- a/drivers/gpu/drm/amd/include/kgd_kfd_interface.h +++ b/drivers/gpu/drm/amd/include/kgd_kfd_interface.h @@ -276,6 +276,10 @@ struct tile_config { * faults. On GFXv9 VM fault information is fully contained in the IH * packet and this function is not needed. * + * @read_vmid_from_vmfault_reg: On Hawaii the VMID is not set in the + * IH ring entry. This function allows the KFD ISR to get the VMID + * from the fault status register as early as possible. + * * This structure contains function pointers to services that the kgd driver * provides to amdkfd driver. * @@ -394,6 +398,7 @@ struct kfd2kgd_calls { int (*get_vm_fault_info)(struct kgd_dev *kgd, struct kfd_vm_fault_info *info); + uint32_t (*read_vmid_from_vmfault_reg)(struct kgd_dev *kgd); }; /** |