Thanks for your review, will send a patch to review again as your suggestion. I
think it will be better to use the amdgpu_sriov_vf(adev).
As need to let somebody to test all your bare metal test cases, such as vega10,
and other asics, as I don't have those environments, and only could test sriov.
If passed those bare metal test cases and fixed the bugs if occurs, then could
remove the amdgpu_sriov_vf(adev). Do you think so?
Best wishes
Emily Deng
>-----Original Message-----
>From: Christian König <ckoenig.leichtzumer...@gmail.com>
>Sent: Tuesday, August 14, 2018 8:46 PM
>To: Deng, Emily <emily.d...@amd.com>; amd-gfx@lists.freedesktop.org
>Subject: Re: [PATCH v2] drm/amdgpu/sriov: For sriov runtime, use kiq to do
>invalidate tlb
>
>Am 14.08.2018 um 12:56 schrieb Emily Deng:
>> To avoid the tlb flush not interrupted by world switch, use kiq and
>> one command to do tlb invalidate.
>>
>> v2:
>> Add firmware version checking.
>>
>> SWDEV-161497
>>
>> Signed-off-by: Emily Deng <emily.d...@amd.com>
>> ---
>> drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 63
>++++++++++++++++++++++++++++++++
>> drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h | 2 +
>> drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 7 ++++
>> 3 files changed, 72 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
>> index 21adb1b6..436030c 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
>> @@ -233,6 +233,69 @@ void amdgpu_virt_kiq_wreg(struct amdgpu_device
>*adev, uint32_t reg, uint32_t v)
>> pr_err("failed to write reg:%x\n", reg);
>> }
>>
>> +signed long amdgpu_virt_kiq_invalidate_tlb(struct amdgpu_device *adev,
>struct amdgpu_vmhub *hub,
>> + unsigned eng, u32 req, uint32_t vmid)
>
>Drop that function here. It is Vega specific and doesn't belong into common
>code.
>
>> +{
>> + signed long r, cnt = 0;
>> + unsigned long flags;
>> + uint32_t seq;
>> + struct amdgpu_kiq *kiq = &adev->gfx.kiq;
>> + struct amdgpu_ring *ring = &kiq->ring;
>> + struct drm_amdgpu_info_firmware fw_info;
>> +
>> + if (ring->me == 1) {
>> + fw_info.ver = adev->gfx.mec_fw_version;
>> + fw_info.feature = adev->gfx.mec_feature_version;
>> + } else {
>> + fw_info.ver = adev->gfx.mec2_fw_version;
>> + fw_info.feature = adev->gfx.mec2_feature_version;
>> + }
>> +
>> + if (fw_info.ver < 0x00000190 || fw_info.feature < 42)
>> + return -EPERM;
>
>Please move that check into gfx_v9_0_ring_emit_reg_write_reg_wait().
>
>> +
>> + BUG_ON(!ring->funcs->emit_reg_write_reg_wait);
>
>That check is superfluous.
>
>> +
>> + spin_lock_irqsave(&kiq->ring_lock, flags);
>> + amdgpu_ring_alloc(ring, 32);
>> + amdgpu_ring_emit_reg_write_reg_wait(ring, hub->vm_inv_eng0_req +
>eng,
>> + hub->vm_inv_eng0_ack + eng,
>> + req, 1 << vmid);
>> + amdgpu_fence_emit_polling(ring, &seq);
>> + amdgpu_ring_commit(ring);
>> + spin_unlock_irqrestore(&kiq->ring_lock, flags);
>> +
>> + r = amdgpu_fence_wait_polling(ring, seq, MAX_KIQ_REG_WAIT);
>> +
>> + /* don't wait anymore for gpu reset case because this way may
>> + * block gpu_recover() routine forever, e.g. this virt_kiq_rreg
>> + * is triggered in TTM and ttm_bo_lock_delayed_workqueue() will
>> + * never return if we keep waiting in virt_kiq_rreg, which cause
>> + * gpu_recover() hang there.
>> + *
>> + * also don't wait anymore for IRQ context
>> + * */
>> + if (r < 1 && (adev->in_gpu_reset || in_interrupt()))
>> + goto failed_kiq;
>> +
>> + if (in_interrupt())
>> + might_sleep();
>> +
>> + while (r < 1 && cnt++ < MAX_KIQ_REG_TRY) {
>> + msleep(MAX_KIQ_REG_BAILOUT_INTERVAL);
>> + r = amdgpu_fence_wait_polling(ring, seq,
>MAX_KIQ_REG_WAIT);
>> + }
>> +
>> + if (cnt > MAX_KIQ_REG_TRY)
>> + goto failed_kiq;
>> +
>> + return 0;
>> +
>> +failed_kiq:
>> + pr_err("failed to invalidate tlb with kiq\n");
>> + return r;
>> +}
>> +
>> /**
>> * amdgpu_virt_request_full_gpu() - request full gpu access
>> * @amdgpu: amdgpu device.
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
>> index 880ac11..8908ff9 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
>> @@ -288,6 +288,8 @@ void amdgpu_free_static_csa(struct amdgpu_device
>*adev);
>> void amdgpu_virt_init_setting(struct amdgpu_device *adev);
>> uint32_t amdgpu_virt_kiq_rreg(struct amdgpu_device *adev, uint32_t reg);
>> void amdgpu_virt_kiq_wreg(struct amdgpu_device *adev, uint32_t reg,
>> uint32_t v);
>> +signed long amdgpu_virt_kiq_invalidate_tlb(struct amdgpu_device *adev,
>struct amdgpu_vmhub *hub,
>> + unsigned eng, u32 req, uint32_t vmid);
>> int amdgpu_virt_request_full_gpu(struct amdgpu_device *adev, bool init);
>> int amdgpu_virt_release_full_gpu(struct amdgpu_device *adev, bool init);
>> int amdgpu_virt_reset_gpu(struct amdgpu_device *adev); diff --git
>> a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
>> b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
>> index 6999042..812f71e 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
>> @@ -331,6 +331,7 @@ static void gmc_v9_0_flush_gpu_tlb(struct
>amdgpu_device *adev,
>> /* Use register 17 for GART */
>> const unsigned eng = 17;
>> unsigned i, j;
>> + int r;
>>
>> spin_lock(&adev->gmc.invalidate_lock);
>>
>> @@ -338,6 +339,12 @@ static void gmc_v9_0_flush_gpu_tlb(struct
>amdgpu_device *adev,
>> struct amdgpu_vmhub *hub = &adev->vmhub[i];
>> u32 tmp = gmc_v9_0_get_invalidate_req(vmid);
>>
>> + if (amdgpu_sriov_vf(adev) && amdgpu_sriov_runtime(adev)) {
>> + r = amdgpu_virt_kiq_invalidate_tlb(adev, hub, eng, tmp,
>vmid);
>> + if (!r)
>> + continue;
>> + }
>> +
>
>Drop that SRIOV check here. We don't want specialized code path for SRIOV.
>
>Christian.
>
>> WREG32_NO_KIQ(hub->vm_inv_eng0_req + eng, tmp);
>>
>> /* Busy wait for ACK.*/
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