[PATCH 1/1] drm/amdgpu: export gfx capability by gpu info
Christian König
deathsimple at vodafone.de
Fri Feb 17 10:21:06 UTC 2017
Am 17.02.2017 um 06:02 schrieb Zhang, Jerry:
> Hi Christian,
>
> Thanks for specifying it.
>
> Please check my update in another mail if getting the correct info as you mentioned.
>
>> Just make sure that the default value is zero, this way you keep backward
>> compatible with older kernel interfaces.
> I have checked all gfx from 6 to 8. By default they are 1. Just 2 APUs(gfxv8) are 0.
In this case you might want to bump the driver minor number as well to
indicate validity of that field.
See we can extend the structures by adding new fields to the end, but
old kernels will not set those fields (so they stay zero cleared).
Not sure what the UMD is expecting here.
Regards,
Christian.
>
> Regards,
> Jerry (Junwei Zhang)
>
> Linux Base Graphics
> SRDC Software Development
> _____________________________________
>
>
>> -----Original Message-----
>> From: Christian König [mailto:deathsimple at vodafone.de]
>> Sent: Thursday, February 16, 2017 17:37
>> To: Zhang, Jerry; amd-gfx at lists.freedesktop.org
>> Subject: Re: [PATCH 1/1] drm/amdgpu: export gfx capability by gpu info
>>
>> Am 16.02.2017 um 10:24 schrieb Zhang, Jerry:
>>>> -----Original Message-----
>>>> From: Christian König [mailto:deathsimple at vodafone.de]
>>>> Sent: Thursday, February 16, 2017 17:12
>>>> To: Zhang, Jerry; amd-gfx at lists.freedesktop.org
>>>> Subject: Re: [PATCH 1/1] drm/amdgpu: export gfx capability by gpu
>>>> info
>>>>
>>>> Am 16.02.2017 um 03:53 schrieb Junwei Zhang:
>>>>> Change-Id: Ibf3e4dbb7deb83271adabc275c9b7a0e0652541a
>>>>> Signed-off-by: Junwei Zhang <Jerry.Zhang at amd.com>
>>>> Complete NAK on this. The drm_amdgpu_capability structure is specific
>>>> to the pro driver.
>>> Thanks to reminder it.
>>> I neglect it.
>>>
>>>> The Vulkan stack on the other hand is supposed to work on the open
>>>> stack as well.
>>>>
>>>> So please but that into the drm_amdgpu_info_device structure and the
>>>> new field in the amdgpu_gca_config structure (you might as well want
>>>> to rename the amdgpu_gca_config structure).
>>> So you mean add the feature or config structure in amdgpu_device directly
>> from now on.
>>> Right?
>> No, just forget about the config or feature structure. Add gfx features to
>> amdgpu_gca_config.
>>
>>> Could you explain the meaning about gca?
>> I just think that the naming isn't the best, something like amdgpu_gfx_config
>> would probably be better.
>>
>>> BTW,
>>> 1) in the future we may add more feature/config in the same structure, but
>> may not for gfx.
>>
>> Stop, that is really bad design. The features/config should be kept on a per IP
>> basis.
>>
>> So gfx config/features should only be grouped together with gfx features. Don't
>> mix features from different block inside the kernel module.
>>
>> The IOCTL interface is a different story, here we have the
>> drm_amdgpu_info_device structure for information about the whole GPU as
>> well as individual structures about each IP block (like firmware versions etc...).
>>
>> For the current case adding that to drm_amdgpu_info_device sounds like the
>> right approach to me.
>>
>>> 2) Shall we add a version to control these features? UMD could know the
>> features status according to the version.
>>
>> No, the size of the drm_amdgpu_info_device structure is already version
>> controlled.
>>
>> Just make sure that the default value is zero, this way you keep backward
>> compatible with older kernel interfaces.
>>
>> Regards,
>> Christian.
>>
>>>> Regards,
>>>> Christian.
>>>>
>>>>> ---
>>>>> drivers/gpu/drm/amd/amdgpu/amdgpu.h | 6 ++++++
>>>>> drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 2 ++
>>>>> drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c | 6 ++++++
>>>>> drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c | 6 ++++++
>>>>> drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 14 ++++++++++++++
>>>>> include/uapi/drm/amdgpu_drm.h | 1 +
>>>>> 6 files changed, 35 insertions(+)
>>>>>
>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>>>> index 1ad3f08..cdc2b2a 100644
>>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>>>> @@ -869,6 +869,10 @@ struct amdgpu_gfx_funcs {
>>>>> void (*read_wave_sgprs)(struct amdgpu_device *adev, uint32_t
>>>>> simd,
>>>> uint32_t wave, uint32_t start, uint32_t size, uint32_t *dst);
>>>>> };
>>>>>
>>>>> +struct amdgpu_gfx_cap {
>>>>> + uint32_t gc_double_offchip_lds_buf; };
>>>>> +
>>>>> struct amdgpu_gfx {
>>>>> struct mutex gpu_clock_mutex;
>>>>> struct amdgpu_gca_config config;
>>>>> @@ -911,6 +915,8 @@ struct amdgpu_gfx {
>>>>> /* reset mask */
>>>>> uint32_t grbm_soft_reset;
>>>>> uint32_t srbm_soft_reset;
>>>>> +
>>>>> + struct amdgpu_gfx_cap cap;
>>>>> };
>>>>>
>>>>> int amdgpu_ib_get(struct amdgpu_device *adev, struct amdgpu_vm
>>>>> *vm, diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>>>> index 7f59608..e7aa382 100644
>>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>>>> @@ -618,6 +618,8 @@ static int amdgpu_info_ioctl(struct drm_device
>>>>> *dev,
>>>> void *data, struct drm_file
>>>>> cap.flag |= AMDGPU_CAPABILITY_DIRECT_GMA_FLAG;
>>>>> cap.direct_gma_size = amdgpu_direct_gma_size;
>>>>> }
>>>>> + cap.gc_double_offchip_lds_buf =
>>>>> + adev->gfx.cap.gc_double_offchip_lds_buf;
>>>>> return copy_to_user(out, &cap,
>>>>> min((size_t)size, sizeof(cap))) ? -EFAULT : 0;
>>>>> }
>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c
>>>>> b/drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c
>>>>> index ce75d46..a1e221b 100644
>>>>> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c
>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c
>>>>> @@ -1534,6 +1534,11 @@ static void gfx_v6_0_setup_spi(struct
>>>> amdgpu_device *adev,
>>>>> mutex_unlock(&adev->grbm_idx_mutex);
>>>>> }
>>>>>
>>>>> +static void gfx_v6_0_cap_init(struct amdgpu_device *adev) {
>>>>> + adev->gfx.cap.gc_double_offchip_lds_buf = 1; }
>>>>> +
>>>>> static void gfx_v6_0_gpu_init(struct amdgpu_device *adev)
>>>>> {
>>>>> u32 gb_addr_config = 0;
>>>>> @@ -1692,6 +1697,7 @@ static void gfx_v6_0_gpu_init(struct
>>>>> amdgpu_device
>>>> *adev)
>>>>> adev->gfx.config.max_cu_per_sh);
>>>>>
>>>>> gfx_v6_0_get_cu_info(adev);
>>>>> + gfx_v6_0_cap_init(adev);
>>>>>
>>>>> WREG32(mmCP_QUEUE_THRESHOLDS, ((0x16 <<
>>>> CP_QUEUE_THRESHOLDS__ROQ_IB1_START__SHIFT) |
>>>>> (0x2b <<
>>>> CP_QUEUE_THRESHOLDS__ROQ_IB2_START__SHIFT)));
>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c
>>>>> b/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c
>>>>> index aaf66fe..e1e97ae 100644
>>>>> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c
>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c
>>>>> @@ -1876,6 +1876,11 @@ static void gmc_v7_0_init_compute_vmid(struct
>>>> amdgpu_device *adev)
>>>>> mutex_unlock(&adev->srbm_mutex);
>>>>> }
>>>>>
>>>>> +static void gfx_v7_0_cap_init(struct amdgpu_device *adev) {
>>>>> + adev->gfx.cap.gc_double_offchip_lds_buf = 1; }
>>>>> +
>>>>> /**
>>>>> * gfx_v7_0_gpu_init - setup the 3D engine
>>>>> *
>>>>> @@ -1900,6 +1905,7 @@ static void gfx_v7_0_gpu_init(struct
>>>>> amdgpu_device *adev)
>>>>>
>>>>> gfx_v7_0_setup_rb(adev);
>>>>> gfx_v7_0_get_cu_info(adev);
>>>>> + gfx_v7_0_cap_init(adev);
>>>>>
>>>>> /* set HW defaults for 3D engine */
>>>>> WREG32(mmCP_MEQ_THRESHOLDS,
>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
>>>>> b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
>>>>> index ce05e38..934fc71 100644
>>>>> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
>>>>> @@ -3826,6 +3826,19 @@ static void gfx_v8_0_init_compute_vmid(struct
>>>> amdgpu_device *adev)
>>>>> mutex_unlock(&adev->srbm_mutex);
>>>>> }
>>>>>
>>>>> +static void gfx_v8_0_cap_init(struct amdgpu_device *adev) {
>>>>> + switch (adev->asic_type) {
>>>>> + default:
>>>>> + adev->gfx.cap.gc_double_offchip_lds_buf = 1;
>>>>> + break;
>>>>> + case CHIP_CARRIZO:
>>>>> + case CHIP_STONEY:
>>>>> + adev->gfx.cap.gc_double_offchip_lds_buf = 0;
>>>>> + break;
>>>>> + }
>>>>> +}
>>>>> +
>>>>> static void gfx_v8_0_gpu_init(struct amdgpu_device *adev)
>>>>> {
>>>>> u32 tmp, sh_static_mem_cfg;
>>>>> @@ -3839,6 +3852,7 @@ static void gfx_v8_0_gpu_init(struct
>>>>> amdgpu_device
>>>> *adev)
>>>>> gfx_v8_0_tiling_mode_table_init(adev);
>>>>> gfx_v8_0_setup_rb(adev);
>>>>> gfx_v8_0_get_cu_info(adev);
>>>>> + gfx_v8_0_cap_init(adev);
>>>>>
>>>>> /* XXX SH_MEM regs */
>>>>> /* where to put LDS, scratch, GPUVM in FSA64 space */ diff --git
>>>>> a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
>>>>> index 04daab3..7064fdc 100644
>>>>> --- a/include/uapi/drm/amdgpu_drm.h
>>>>> +++ b/include/uapi/drm/amdgpu_drm.h
>>>>> @@ -853,6 +853,7 @@ struct drm_amdgpu_virtual_range {
>>>>> struct drm_amdgpu_capability {
>>>>> __u32 flag;
>>>>> __u32 direct_gma_size;
>>>>> + __u32 gc_double_offchip_lds_buf;
>>>>> };
>>>>>
>>>>> /*
>>> _______________________________________________
>>> amd-gfx mailing list
>>> amd-gfx at lists.freedesktop.org
>>> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
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