[PATCH 4/5] drm/amdgpu: Initialize Aldebaran RLC function pointers
Liu, Shaoyun
Shaoyun.Liu at amd.com
Thu Dec 16 17:51:23 UTC 2021
[AMD Official Use Only]
Actually I don't know why the change " a35f147621bc drm/amdgpu: get xgmi info at eary_init " not in drm-next , instead it’s in amd-mainline-dkms-5.13. That change is necessary for passthrough XGMI hive to a VM and rely on our driver to do the reset on whole hive when driver is loaded .
I checked the code again, it seems we should be ok as long as we get xgmi info at eary_init. So since gfx_v9_0_set_rlc_funcs() already gets called in gfx_v9_0_early_init(), we can move get xgmi info out of gmc_early_init and call it at the last step early_init .
Regards
Shaoyun.liu
-----Original Message-----
From: Skvortsov, Victor <Victor.Skvortsov at amd.com>
Sent: Thursday, December 16, 2021 9:28 AM
To: Alex Deucher <alexdeucher at gmail.com>
Cc: amd-gfx list <amd-gfx at lists.freedesktop.org>; Deng, Emily <Emily.Deng at amd.com>; Liu, Monk <Monk.Liu at amd.com>; Ming, Davis <Davis.Ming at amd.com>; Liu, Shaoyun <Shaoyun.Liu at amd.com>; Zhou, Peng Ju <PengJu.Zhou at amd.com>; Chen, JingWen <JingWen.Chen2 at amd.com>; Chen, Horace <Horace.Chen at amd.com>; Nieto, David M <David.Nieto at amd.com>
Subject: RE: [PATCH 4/5] drm/amdgpu: Initialize Aldebaran RLC function pointers
[AMD Official Use Only]
Gotcha, I will skip this patch for drm-next
-----Original Message-----
From: Alex Deucher <alexdeucher at gmail.com>
Sent: Thursday, December 16, 2021 8:53 AM
To: Skvortsov, Victor <Victor.Skvortsov at amd.com>
Cc: amd-gfx list <amd-gfx at lists.freedesktop.org>; Deng, Emily <Emily.Deng at amd.com>; Liu, Monk <Monk.Liu at amd.com>; Ming, Davis <Davis.Ming at amd.com>; Liu, Shaoyun <Shaoyun.Liu at amd.com>; Zhou, Peng Ju <PengJu.Zhou at amd.com>; Chen, JingWen <JingWen.Chen2 at amd.com>; Chen, Horace <Horace.Chen at amd.com>; Nieto, David M <David.Nieto at amd.com>
Subject: Re: [PATCH 4/5] drm/amdgpu: Initialize Aldebaran RLC function pointers
[CAUTION: External Email]
On Wed, Dec 15, 2021 at 6:58 PM Skvortsov, Victor <Victor.Skvortsov at amd.com> wrote:
>
> [AMD Official Use Only]
>
> Hey Alex,
>
> This change was based on the fact that amd-mainline-dkms-5.13 calls get_xgmi_info() in gmc_v9_0_early_init(). But I can see that drm-next it's instead called in gmc_v9_0_sw_init(). So, I'm not sure whats the correct behavior. But I do agree that the change is kind of ugly. I don't know where else to put it if we do need to call get_xgmi_info() in early_init.
>
We could skip this patch for drm-next and just apply it to the dkms branch. There's already a lot of ugly stuff in there to deal with multiple kernel versions.
Alex
> Thanks,
> Victor
>
> -----Original Message-----
> From: Alex Deucher <alexdeucher at gmail.com>
> Sent: Wednesday, December 15, 2021 4:38 PM
> To: Skvortsov, Victor <Victor.Skvortsov at amd.com>
> Cc: amd-gfx list <amd-gfx at lists.freedesktop.org>; Deng, Emily
> <Emily.Deng at amd.com>; Liu, Monk <Monk.Liu at amd.com>; Ming, Davis
> <Davis.Ming at amd.com>; Liu, Shaoyun <Shaoyun.Liu at amd.com>; Zhou, Peng
> Ju <PengJu.Zhou at amd.com>; Chen, JingWen <JingWen.Chen2 at amd.com>; Chen,
> Horace <Horace.Chen at amd.com>; Nieto, David M <David.Nieto at amd.com>
> Subject: Re: [PATCH 4/5] drm/amdgpu: Initialize Aldebaran RLC function
> pointers
>
> [CAUTION: External Email]
>
> On Wed, Dec 15, 2021 at 1:56 PM Victor Skvortsov <victor.skvortsov at amd.com> wrote:
> >
> > In SRIOV, RLC function pointers must be initialized early as we rely
> > on the RLCG interface for all GC register access.
> >
> > Signed-off-by: Victor Skvortsov <victor.skvortsov at amd.com>
> > ---
> > drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c | 2 ++
> > drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 3 +--
> > drivers/gpu/drm/amd/amdgpu/gfx_v9_0.h | 2 ++
> > 3 files changed, 5 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
> > b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
> > index 65e1f6cc59dd..1bc92a38d124 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
> > @@ -844,6 +844,8 @@ static int amdgpu_discovery_set_gc_ip_blocks(struct amdgpu_device *adev)
> > case IP_VERSION(9, 4, 1):
> > case IP_VERSION(9, 4, 2):
> > amdgpu_device_ip_block_add(adev,
> > &gfx_v9_0_ip_block);
> > + if (amdgpu_sriov_vf(adev) && adev->ip_versions[GC_HWIP][0] == IP_VERSION(9, 4, 2))
> > + gfx_v9_0_set_rlc_funcs(adev);
>
> amdgpu_discovery.c is IP independent. I'd rather not add random IP specific function calls. gfx_v9_0_set_rlc_funcs() already gets called in gfx_v9_0_early_init(). Is that not early enough? In general we shouldn't be touching the hardware much if at all in early_init.
>
> Alex
>
> > break;
> > case IP_VERSION(10, 1, 10):
> > case IP_VERSION(10, 1, 2):
> > diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
> > b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
> > index edb3e3b08eed..d252b06efa43 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
> > @@ -816,7 +816,6 @@ static void gfx_v9_0_sriov_wreg(struct
> > amdgpu_device *adev, u32 offset, static void
> > gfx_v9_0_set_ring_funcs(struct amdgpu_device *adev); static void
> > gfx_v9_0_set_irq_funcs(struct amdgpu_device *adev); static void
> > gfx_v9_0_set_gds_init(struct amdgpu_device *adev); -static void
> > gfx_v9_0_set_rlc_funcs(struct amdgpu_device *adev); static int gfx_v9_0_get_cu_info(struct amdgpu_device *adev,
> > struct amdgpu_cu_info *cu_info);
> > static uint64_t gfx_v9_0_get_gpu_clock_counter(struct amdgpu_device
> > *adev); @@ -7066,7 +7065,7 @@ static void gfx_v9_0_set_irq_funcs(struct amdgpu_device *adev)
> > adev->gfx.cp_ecc_error_irq.funcs =
> > &gfx_v9_0_cp_ecc_error_irq_funcs; }
> >
> > -static void gfx_v9_0_set_rlc_funcs(struct amdgpu_device *adev)
> > +void gfx_v9_0_set_rlc_funcs(struct amdgpu_device *adev)
> > {
> > switch (adev->ip_versions[GC_HWIP][0]) {
> > case IP_VERSION(9, 0, 1):
> > diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.h
> > b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.h
> > index dfe8d4841f58..1817e252354f 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.h
> > +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.h
> > @@ -29,4 +29,6 @@ extern const struct amdgpu_ip_block_version
> > gfx_v9_0_ip_block; void gfx_v9_0_select_se_sh(struct amdgpu_device *adev, u32 se_num, u32 sh_num,
> > u32 instance);
> >
> > +void gfx_v9_0_set_rlc_funcs(struct amdgpu_device *adev);
> > +
> > #endif
> > --
> > 2.25.1
> >
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