[PATCH] drm/amdgpu: Add place holder for soc15 asic init on emulation

Tue Feb 6 22:02:50 UTC 2018

On Tue, Feb 6, 2018 at 4:55 PM, Liu, Shaoyun <Shaoyun.Liu at amd.com> wrote:
> Ye, I  try to put  the asic specific  register sequences for emulation in a separate emu_soc.c file, I think it's suggested by John or you ?  The asic specific code will  be  keep in separate bring up branch , but a common place to add them  seems  not bad to me .
>
> Shaoyun.liu

I guess the idea is that you could use emu_soc_asic_init() for any
family, that makes sense.  To keep the logic more similar to actual
silicon, it might be better to make emu_soc_asic_init() a replacement
for atom_asic_init() in amdgpu_device.c.  E.g.,

if (emu == 1) {
    emu_soc_asic_init();
} else {
    // do vbios stuff
}

Then we can drop the other changes to the ip ordering for emulation.

Alex

>
> -----Original Message-----
> From: Alex Deucher [mailto:alexdeucher at gmail.com]
> Sent: Tuesday, February 06, 2018 4:46 PM
> To: Liu, Shaoyun
> Cc: amd-gfx list
> Subject: Re: [PATCH] drm/amdgpu: Add place holder for soc15 asic init on emulation
>
> On Tue, Feb 6, 2018 at 4:41 PM, Shaoyun Liu <Shaoyun.Liu at amd.com> wrote:
>> Change-Id: I6ff04e1199d1ebdbdb31d0e7e8ca3c240c61ab3a
>> Signed-off-by: Shaoyun Liu <Shaoyun.Liu at amd.com>
>
> What is the purpose of this?  If it's just as a hint the the driver writer as to where to add the emulation register sequences from the IP teams, I don't see much value in it.  Just add a comment.
>
> Alex
>
>
>> ---
>>  drivers/gpu/drm/amd/amdgpu/Makefile  |  2 +-
>> drivers/gpu/drm/amd/amdgpu/amdgpu.h  |  2 ++
>> drivers/gpu/drm/amd/amdgpu/emu_soc.c | 33 +++++++++++++++++++++++++++++++++
>>  drivers/gpu/drm/amd/amdgpu/soc15.c   |  4 ++++
>>  4 files changed, 40 insertions(+), 1 deletion(-)  create mode 100644
>> drivers/gpu/drm/amd/amdgpu/emu_soc.c
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile
>> b/drivers/gpu/drm/amd/amdgpu/Makefile
>> index 1f6d43e..6f5db5e 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/Makefile
>> +++ b/drivers/gpu/drm/amd/amdgpu/Makefile
>> @@ -41,7 +41,7 @@ amdgpu-$(CONFIG_DRM_AMDGPU_CIK)+= cik.o cik_ih.o
>> kv_smc.o kv_dpm.o \  amdgpu-$(CONFIG_DRM_AMDGPU_SI)+= si.o gmc_v6_0.o
>> gfx_v6_0.o si_ih.o si_dma.o dce_v6_0.o si_dpm.o si_smc.o
>>
>>  amdgpu-y += \
>> -       vi.o mxgpu_vi.o nbio_v6_1.o soc15.o mxgpu_ai.o nbio_v7_0.o vega10_reg_init.o vega20_reg_init.o nbio_v7_4.o
>> +       vi.o mxgpu_vi.o nbio_v6_1.o soc15.o emu_soc.o mxgpu_ai.o
>> + nbio_v7_0.o vega10_reg_init.o vega20_reg_init.o nbio_v7_4.o
>>
>>  # add GMC block
>>  amdgpu-y += \
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>> index d417cfb..13aa8a8 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>> @@ -1740,6 +1740,8 @@ void amdgpu_mm_wreg(struct amdgpu_device *adev,
>> uint32_t reg, uint32_t v,  bool amdgpu_device_asic_has_dc_support(enum
>> amd_asic_type asic_type);  bool amdgpu_device_has_dc_support(struct
>> amdgpu_device *adev);
>>
>> +int emu_soc_asic_init(struct amdgpu_device *adev);
>> +
>>  /*
>>   * Registers read & write functions.
>>   */
>> diff --git a/drivers/gpu/drm/amd/amdgpu/emu_soc.c
>> b/drivers/gpu/drm/amd/amdgpu/emu_soc.c
>> new file mode 100644
>> index 0000000..d72c25c
>> --- /dev/null
>> +++ b/drivers/gpu/drm/amd/amdgpu/emu_soc.c
>> @@ -0,0 +1,33 @@
>> +/*
>> + * Copyright 2018 Advanced Micro Devices, Inc.
>> + *
>> + * Permission is hereby granted, free of charge, to any person
>> +obtaining a
>> + * copy of this software and associated documentation files (the
>> +"Software"),
>> + * to deal in the Software without restriction, including without
>> +limitation
>> + * the rights to use, copy, modify, merge, publish, distribute,
>> +sublicense,
>> + * and/or sell copies of the Software, and to permit persons to whom
>> +the
>> + * Software is furnished to do so, subject to the following conditions:
>> + *
>> + * The above copyright notice and this permission notice shall be
>> +included in
>> + * all copies or substantial portions of the Software.
>> + *
>> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
>> +EXPRESS OR
>> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
>> +MERCHANTABILITY,
>> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT
>> +SHALL
>> + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM,
>> +DAMAGES OR
>> + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
>> +OTHERWISE,
>> + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
>> +OR
>> + * OTHER DEALINGS IN THE SOFTWARE.
>> + *
>> + */
>> +#include "amdgpu.h"
>> +#include "soc15.h"
>> +
>> +#include "soc15_common.h"
>> +#include "soc15_hw_ip.h"
>> +
>> +int emu_soc_asic_init(struct amdgpu_device *adev) {
>> +       return 0;
>> +}
>> +
>> diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c
>> b/drivers/gpu/drm/amd/amdgpu/soc15.c
>> index 22cd84f..6a3d108 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/soc15.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/soc15.c
>> @@ -747,6 +747,10 @@ static int soc15_common_hw_init(void *handle)  {
>>         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
>>
>> +       /* Add asic specific init sequence for emulation */
>> +       if (amdgpu_emu_mode == 1)
>> +               emu_soc_asic_init(adev);
>> +
>>         /* enable pcie gen2/3 link */
>>         soc15_pcie_gen3_enable(adev);
>>         /* enable aspm */
>> --
>> 1.9.1
>>
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