Am 06.09.23 um 16:35 schrieb Shashank Sharma:
On 06/09/2023 16:25, Shashank Sharma wrote:
On 05/09/2023 08:04, Christian König wrote:
Testing for reset is pointless since the reset can start right after
the
test. Grab the reset semaphore instead.
The same PASID can be used by more than once VMID, build a mask of
VMIDs
to reset instead of just restting the first one.
Signed-off-by: Christian König <christian.koenig@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c | 19 ++++++++++---------
1 file changed, 10 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
index 6a6929ac2748..9e19a752f94b 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
@@ -33,6 +33,7 @@
#include "amdgpu_ucode.h"
#include "amdgpu_amdkfd.h"
#include "amdgpu_gem.h"
+#include "amdgpu_reset.h"
#include "bif/bif_4_1_d.h"
#include "bif/bif_4_1_sh_mask.h"
@@ -426,23 +427,23 @@ static int gmc_v7_0_flush_gpu_tlb_pasid(struct
amdgpu_device *adev,
uint16_t pasid, uint32_t flush_type,
bool all_hub, uint32_t inst)
{
+ u32 mask = 0x0;
int vmid;
- unsigned int tmp;
- if (amdgpu_in_reset(adev))
- return -EIO;
+ if(!down_read_trylock(&adev->reset_domain->sem))
+ return 0;
for (vmid = 1; vmid < 16; vmid++) {
+ u32 tmp = RREG32(mmATC_VMID0_PASID_MAPPING + vmid);
- tmp = RREG32(mmATC_VMID0_PASID_MAPPING + vmid);
if ((tmp & ATC_VMID0_PASID_MAPPING__VALID_MASK) &&
- (tmp & ATC_VMID0_PASID_MAPPING__PASID_MASK) == pasid) {
- WREG32(mmVM_INVALIDATE_REQUEST, 1 << vmid);
- RREG32(mmVM_INVALIDATE_RESPONSE);
- break;
- }
+ (tmp & ATC_VMID0_PASID_MAPPING__PASID_MASK) == pasid)
+ mask |= 1 << vmid;
I am a bit concerned here about the change in code, in the previous
code we were writing the 'first match out of 16' of tmp and of mask
and programming the registers with (1 << vmid), whereas in new code
set we are writing the 'last match out of 16' of vmid. Is that
intentional or expected ?
With last, I mean all matching bits until last :)
Take a closer look :)
The bits are ORed together for each VMID which has the matching pasid.
Christian.
- Shashank
}
+ WREG32(mmVM_INVALIDATE_REQUEST, mask);
+ RREG32(mmVM_INVALIDATE_RESPONSE);
+ up_read(&adev->reset_domain->sem);
return 0;
}
