[PATCH 50/59] drm/nouveau/ttm: move to driver allocated manager

[Ben Skeggs]

On Tue, 4 Aug 2020 at 12:58, Dave Airlie <airlied at gmail.com> wrote:
>
> From: Dave Airlie <airlied at redhat.com>
>
> Signed-off-by: Dave Airlie <airlied at redhat.com>
Reviewed-by: Ben Skeggs <bskeggs at redhat.com>

> ---
>  drivers/gpu/drm/nouveau/nouveau_ttm.c | 45 +++++++++++++++++++--------
>  1 file changed, 32 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.c b/drivers/gpu/drm/nouveau/nouveau_ttm.c
> index 1c636723823c..58d9bd708e95 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_ttm.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_ttm.c
> @@ -157,12 +157,12 @@ static int
>  nouveau_ttm_init_vram(struct nouveau_drm *drm)
>  {
>         struct nvif_mmu *mmu = &drm->client.mmu;
> -
>         if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA) {
> -               struct ttm_mem_type_manager *man = ttm_manager_type(&drm->ttm.bdev, TTM_PL_VRAM);
> -
>                 /* Some BARs do not support being ioremapped WC */
>                 const u8 type = mmu->type[drm->ttm.type_vram].type;
> +               struct ttm_mem_type_manager *man = kzalloc(sizeof(struct ttm_mem_type_manager), GFP_KERNEL);
> +               if (!man)
> +                       return -ENOMEM;
>
>                 man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
>                 man->default_caching = TTM_PL_FLAG_WC;
> @@ -174,8 +174,10 @@ nouveau_ttm_init_vram(struct nouveau_drm *drm)
>
>                 man->func = &nouveau_vram_manager;
>                 man->use_io_reserve_lru = true;
> +
>                 ttm_mem_type_manager_init(&drm->ttm.bdev, man,
>                                           drm->gem.vram_available >> PAGE_SHIFT);
> +               ttm_set_driver_manager(&drm->ttm.bdev, TTM_PL_VRAM, man);
>                 ttm_mem_type_manager_set_used(man, true);
>                 return 0;
>         } else {
> @@ -195,6 +197,8 @@ nouveau_ttm_fini_vram(struct nouveau_drm *drm)
>                 ttm_mem_type_manager_disable(man);
>                 ttm_mem_type_manager_force_list_clean(&drm->ttm.bdev, man);
>                 ttm_mem_type_manager_cleanup(man);
> +               ttm_set_driver_manager(&drm->ttm.bdev, TTM_PL_VRAM, NULL);
> +               kfree(man);
>         } else
>                 ttm_range_man_fini(&drm->ttm.bdev, TTM_PL_VRAM);
>  }
> @@ -202,30 +206,43 @@ nouveau_ttm_fini_vram(struct nouveau_drm *drm)
>  static int
>  nouveau_ttm_init_gtt(struct nouveau_drm *drm)
>  {
> -       struct ttm_mem_type_manager *man = ttm_manager_type(&drm->ttm.bdev, TTM_PL_TT);
> +       struct ttm_mem_type_manager *man;
>         unsigned long size_pages = drm->gem.gart_available >> PAGE_SHIFT;
> -       man->use_tt = true;
> +       unsigned available_caching, default_caching;
> +       const struct ttm_mem_type_manager_func *func = NULL;
>         if (drm->agp.bridge) {
> -               man->available_caching = TTM_PL_FLAG_UNCACHED |
> +               available_caching = TTM_PL_FLAG_UNCACHED |
>                         TTM_PL_FLAG_WC;
> -               man->default_caching = TTM_PL_FLAG_WC;
> +               default_caching = TTM_PL_FLAG_WC;
>         } else {
> -               man->available_caching = TTM_PL_MASK_CACHING;
> -               man->default_caching = TTM_PL_FLAG_CACHED;
> +               available_caching = TTM_PL_MASK_CACHING;
> +               default_caching = TTM_PL_FLAG_CACHED;
>         }
>
>         if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA)
> -               man->func = &nouveau_gart_manager;
> +               func = &nouveau_gart_manager;
>         else if (!drm->agp.bridge)
> -               man->func = &nv04_gart_manager;
> +               func = &nv04_gart_manager;
>         else
>                 return ttm_range_man_init(&drm->ttm.bdev, TTM_PL_TT,
> -                                         TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC,
> -                                         TTM_PL_FLAG_WC, true,
> +                                         available_caching, default_caching,
> +                                         true,
>                                           size_pages);
> +
> +       man = kzalloc(sizeof(struct ttm_mem_type_manager), GFP_KERNEL);
> +       if (!man)
> +               return -ENOMEM;
> +
> +       man->func = func;
> +       man->available_caching = available_caching;
> +       man->default_caching = default_caching;
> +       man->use_tt = true;
>         ttm_mem_type_manager_init(&drm->ttm.bdev, man,
>                                   size_pages);
> +
> +       ttm_set_driver_manager(&drm->ttm.bdev, TTM_PL_TT, man);
>         ttm_mem_type_manager_set_used(man, true);
> +
>         return 0;
>  }
>
> @@ -241,6 +258,8 @@ nouveau_ttm_fini_gtt(struct nouveau_drm *drm)
>                 ttm_mem_type_manager_disable(man);
>                 ttm_mem_type_manager_force_list_clean(&drm->ttm.bdev, man);
>                 ttm_mem_type_manager_cleanup(man);
> +               ttm_set_driver_manager(&drm->ttm.bdev, TTM_PL_TT, NULL);
> +               kfree(man);
>         }
>  }
>
> --
> 2.26.2
>
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