[PATCH 2/4] drm/amdgpu: return -ENODEV to user space when vram is lost v2

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> -----Original Message-----
> From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf
> Of Chunming Zhou
> Sent: Tuesday, May 16, 2017 5:26 AM
> To: amd-gfx at lists.freedesktop.org
> Cc: Zhou, David(ChunMing)
> Subject: [PATCH 2/4] drm/amdgpu: return -ENODEV to user space when
> vram is lost v2
> 
> below ioctl will return -ENODEV:
> amdgpu_cs_ioctl
> amdgpu_cs_wait_ioctl
> amdgpu_cs_wait_fences_ioctl
> amdgpu_gem_va_ioctl
> amdgpu_info_ioctl

Do we want to block the info ioctl?  Isn't that where the lost context query is?

Alex

> 
> v2: only for map and replace cases in amdgpu_gem_va_ioctl
> 
> Change-Id: I8970cde3301b7cfeb4263cc0f0e54aece215c98e
> Signed-off-by: Chunming Zhou <David1.Zhou at amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu.h        |  4 ++++
>  drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c     |  9 +++++++++
>  drivers/gpu/drm/amd/amdgpu/amdgpu_device.c |  4 +++-
>  drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c    |  5 +++++
>  drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c    | 10 ++++++++++
>  5 files changed, 31 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> index f9da215..dcd6203 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> @@ -855,6 +855,7 @@ struct amdgpu_fpriv {
>  	struct amdgpu_ctx_mgr	ctx_mgr;
>  	spinlock_t		sem_handles_lock;
>  	struct idr		sem_handles;
> +	u32			vram_lost_counter;
>  };
> 
>  /*
> @@ -1607,6 +1608,7 @@ struct amdgpu_device {
>  	atomic64_t			num_bytes_moved;
>  	atomic64_t			num_evictions;
>  	atomic_t			gpu_reset_counter;
> +	atomic_t			vram_lost_counter;
> 
>  	/* data for buffer migration throttling */
>  	struct {
> @@ -2005,6 +2007,8 @@ static inline void
> amdgpu_unregister_atpx_handler(void) {}
>  extern const struct drm_ioctl_desc amdgpu_ioctls_kms[];
>  extern const int amdgpu_max_kms_ioctl;
> 
> +bool amdgpu_kms_vram_lost(struct amdgpu_device *adev,
> +			  struct amdgpu_fpriv *fpriv);
>  int amdgpu_driver_load_kms(struct drm_device *dev, unsigned long flags);
>  int amdgpu_driver_unload_kms(struct drm_device *dev);
>  void amdgpu_driver_lastclose_kms(struct drm_device *dev);
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> index b803412..911aa02 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> @@ -1097,6 +1097,7 @@ static int amdgpu_cs_submit(struct
> amdgpu_cs_parser *p,
>  int amdgpu_cs_ioctl(struct drm_device *dev, void *data, struct drm_file
> *filp)
>  {
>  	struct amdgpu_device *adev = dev->dev_private;
> +	struct amdgpu_fpriv *fpriv = filp->driver_priv;
>  	union drm_amdgpu_cs *cs = data;
>  	struct amdgpu_cs_parser parser = {};
>  	bool reserved_buffers = false;
> @@ -1104,6 +1105,8 @@ int amdgpu_cs_ioctl(struct drm_device *dev, void
> *data, struct drm_file *filp)
> 
>  	if (!adev->accel_working)
>  		return -EBUSY;
> +	if (amdgpu_kms_vram_lost(adev, fpriv))
> +		return -ENODEV;
> 
>  	parser.adev = adev;
>  	parser.filp = filp;
> @@ -1165,12 +1168,15 @@ int amdgpu_cs_wait_ioctl(struct drm_device
> *dev, void *data,
>  {
>  	union drm_amdgpu_wait_cs *wait = data;
>  	struct amdgpu_device *adev = dev->dev_private;
> +	struct amdgpu_fpriv *fpriv = filp->driver_priv;
>  	unsigned long timeout = amdgpu_gem_timeout(wait->in.timeout);
>  	struct amdgpu_ring *ring = NULL;
>  	struct amdgpu_ctx *ctx;
>  	struct fence *fence;
>  	long r;
> 
> +	if (amdgpu_kms_vram_lost(adev, fpriv))
> +		return -ENODEV;
>  	r = amdgpu_cs_get_ring(adev, wait->in.ip_type, wait-
> >in.ip_instance,
>  			       wait->in.ring, &ring);
>  	if (r)
> @@ -1344,12 +1350,15 @@ int amdgpu_cs_wait_fences_ioctl(struct
> drm_device *dev, void *data,
>  				struct drm_file *filp)
>  {
>  	struct amdgpu_device *adev = dev->dev_private;
> +	struct amdgpu_fpriv *fpriv = filp->driver_priv;
>  	union drm_amdgpu_wait_fences *wait = data;
>  	uint32_t fence_count = wait->in.fence_count;
>  	struct drm_amdgpu_fence *fences_user;
>  	struct drm_amdgpu_fence *fences;
>  	int r;
> 
> +	if (amdgpu_kms_vram_lost(adev, fpriv))
> +		return -ENODEV;
>  	/* Get the fences from userspace */
>  	fences = kmalloc_array(fence_count, sizeof(struct
> drm_amdgpu_fence),
>  			GFP_KERNEL);
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index c56ae4a..2f0fcf8 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -2913,8 +2913,10 @@ int amdgpu_gpu_reset(struct amdgpu_device
> *adev)
>  			if (r)
>  				goto out;
>  			vram_lost = amdgpu_check_vram_lost(adev);
> -			if (vram_lost)
> +			if (vram_lost) {
>  				DRM_ERROR("VRAM is lost!\n");
> +				atomic_inc(&adev->vram_lost_counter);
> +			}
>  			r = amdgpu_ttm_recover_gart(adev);
>  			if (r)
>  				goto out;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> index d8275ef..83bc94c 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> @@ -802,6 +802,11 @@ int amdgpu_gem_va_ioctl(struct drm_device *dev,
> void *data,
>  			args->operation);
>  		return -EINVAL;
>  	}
> +	if ((args->operation == AMDGPU_VA_OP_MAP) ||
> +	    (args->operation == AMDGPU_VA_OP_REPLACE)) {
> +		if (amdgpu_kms_vram_lost(adev, fpriv))
> +			return -ENODEV;
> +	}
> 
>  	INIT_LIST_HEAD(&list);
>  	if ((args->operation != AMDGPU_VA_OP_CLEAR) &&
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> index 368829a..a231aa1 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> @@ -235,6 +235,7 @@ static int amdgpu_firmware_info(struct
> drm_amdgpu_info_firmware *fw_info,
>  static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct
> drm_file *filp)
>  {
>  	struct amdgpu_device *adev = dev->dev_private;
> +	struct amdgpu_fpriv *fpriv = filp->driver_priv;
>  	struct drm_amdgpu_info *info = data;
>  	struct amdgpu_mode_info *minfo = &adev->mode_info;
>  	void __user *out = (void __user *)(uintptr_t)info->return_pointer;
> @@ -247,6 +248,8 @@ static int amdgpu_info_ioctl(struct drm_device *dev,
> void *data, struct drm_file
> 
>  	if (!info->return_size || !info->return_pointer)
>  		return -EINVAL;
> +	if (amdgpu_kms_vram_lost(adev, fpriv))
> +		return -ENODEV;
> 
>  	switch (info->query) {
>  	case AMDGPU_INFO_VIRTUAL_RANGE: {
> @@ -779,6 +782,12 @@ void amdgpu_driver_lastclose_kms(struct
> drm_device *dev)
>  	vga_switcheroo_process_delayed_switch();
>  }
> 
> +bool amdgpu_kms_vram_lost(struct amdgpu_device *adev,
> +			  struct amdgpu_fpriv *fpriv)
> +{
> +	return fpriv->vram_lost_counter != atomic_read(&adev-
> >vram_lost_counter);
> +}
> +
>  /**
>   * amdgpu_driver_open_kms - drm callback for open
>   *
> @@ -833,6 +842,7 @@ int amdgpu_driver_open_kms(struct drm_device
> *dev, struct drm_file *file_priv)
> 
>  	amdgpu_ctx_mgr_init(&fpriv->ctx_mgr);
> 
> +	fpriv->vram_lost_counter = atomic_read(&adev-
> >vram_lost_counter);
>  	file_priv->driver_priv = fpriv;
> 
>  out_suspend:
> --
> 1.9.1
> 
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> amd-gfx at lists.freedesktop.org
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