[PATCH 1/7] drm/amdgpu: add helper function to do common ras_late_init

[Zhou1, Tao]

Another way is to add check for ih_info in amdgpu_ras_interrupt_add_handler and amdgpu_ras_interrupt_remove_handler directly.

> -----Original Message-----
> From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of
> Zhou1, Tao
> Sent: 2019年8月29日 10:59
> To: Zhang, Hawking <Hawking.Zhang at amd.com>; amd-
> gfx at lists.freedesktop.org; Deucher, Alexander
> <Alexander.Deucher at amd.com>
> Cc: Zhang, Hawking <Hawking.Zhang at amd.com>
> Subject: RE: [PATCH 1/7] drm/amdgpu: add helper function to do common
> ras_late_init
> 
> 
> 
> > -----Original Message-----
> > From: Hawking Zhang <Hawking.Zhang at amd.com>
> > Sent: 2019年8月28日 21:03
> > To: amd-gfx at lists.freedesktop.org; Zhou1, Tao <Tao.Zhou1 at amd.com>;
> > Deucher, Alexander <Alexander.Deucher at amd.com>
> > Cc: Zhang, Hawking <Hawking.Zhang at amd.com>
> > Subject: [PATCH 1/7] drm/amdgpu: add helper function to do common
> > ras_late_init
> >
> > In late_init for ras, the helper function will be used to 1). disable
> > ras feature if the IP block is masked as disabled 2). send enable
> > feature command if the ip block was masked as enabled 3). create
> debugfs/sysfs node per IP block 4).
> > register interrupt handler
> >
> > Signed-off-by: Hawking Zhang <Hawking.Zhang at amd.com>
> > ---
> >  drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 57
> > +++++++++++++++++++++++++++++++++
> > drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h |  4 +++
> >  2 files changed, 61 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> > b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> > index 230f7e6..2c32f99 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> > @@ -1564,6 +1564,63 @@ int amdgpu_ras_init(struct amdgpu_device
> *adev)
> >  	return -EINVAL;
> >  }
> >
> > +/* helper function to handle common stuff in ip late init phase */
> > +int amdgpu_ras_late_init(struct amdgpu_device *adev,
> > +			 struct ras_common_if *ras_block,
> > +			 struct ras_fs_if *fs_info,
> > +			 struct ras_ih_if *ih_info)
> > +{
> > +	int r;
> > +
> > +	/* disable RAS feature per IP block if it is not supported */
> > +	if (!amdgpu_ras_is_supported(adev, ras_block->block)) {
> > +		amdgpu_ras_feature_enable_on_boot(adev, ras_block, 0);
> > +		return 0;
> > +	}
> > +
> > +	r = amdgpu_ras_feature_enable_on_boot(adev, ras_block, 1);
> > +	if (r) {
> > +		if (r == -EAGAIN) {
> > +			/* request gpu reset. will run again */
> > +			amdgpu_ras_request_reset_on_boot(adev,
> > +					ras_block->block);
> > +			return 0;
> > +		}
> > +		/* in resume phase, if fail to enable ras,
> > +		 * clean up all ras fs nodes, and disable ras */
> > +		if (adev->in_suspend)
> > +			goto cleanup;
> > +	}
> > +
> > +	/* in resume phase, no need to create ras fs node */
> > +	if (adev->in_suspend)
> > +		return 0;
> > +
> > +	if (ras_block->block == AMDGPU_RAS_BLOCK__UMC ||
> > +	    ras_block->block == AMDGPU_RAS_BLOCK__SDMA ||
> > +	    ras_block->block == AMDGPU_RAS_BLOCK__GFX) {
> [Tao] we can set ih_info to NULL if a ras block has no interrupt and change
> the condition to "if (ih_info)"
> 
> > +		r = amdgpu_ras_interrupt_add_handler(adev, ih_info);
> > +		if (r)
> > +			goto interrupt;
> > +	}
> > +
> > +	amdgpu_ras_debugfs_create(adev, fs_info);
> > +
> > +	r = amdgpu_ras_sysfs_create(adev, fs_info);
> > +	if (r)
> > +		goto sysfs;
> > +
> > +	return 0;
> > +cleanup:
> > +	amdgpu_ras_sysfs_remove(adev, ras_block);
> > +sysfs:
> > +	amdgpu_ras_debugfs_remove(adev, ras_block);
> > +	amdgpu_ras_interrupt_remove_handler(adev, ih_info);
> [Tao] lack of if condition
> 
> > +interrupt:
> > +	amdgpu_ras_feature_enable(adev, ras_block, 0);
> > +	return r;
> > +}
> > +
> >  /* do some init work after IP late init as dependence.
> >   * and it runs in resume/gpu reset/booting up cases.
> >   */
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
> > b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
> > index 6c76bb2..5212961 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
> > @@ -566,6 +566,10 @@ amdgpu_ras_error_to_ta(enum
> amdgpu_ras_error_type
> > error) {  int amdgpu_ras_init(struct amdgpu_device *adev);  int
> > amdgpu_ras_fini(struct amdgpu_device *adev);  int
> > amdgpu_ras_pre_fini(struct amdgpu_device *adev);
> > +int amdgpu_ras_late_init(struct amdgpu_device *adev,
> > +			 struct ras_common_if *ras_block,
> > +			 struct ras_fs_if *fs_info,
> > +			 struct ras_ih_if *ih_info);
> >
> >  int amdgpu_ras_feature_enable(struct amdgpu_device *adev,
> >  		struct ras_common_if *head, bool enable);
> > --
> > 2.7.4
> 
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