Hi Christian Am 29.09.20 um 17:35 schrieb Christian König: > Am 29.09.20 um 17:14 schrieb Thomas Zimmermann: >> The new helper ttm_kmap_obj_to_dma_buf() extracts address and location >> from and instance of TTM's kmap_obj and initializes struct dma_buf_map >> with these values. Helpful for TTM-based drivers. > > We could completely drop that if we use the same structure inside TTM as > well. > > Additional to that which driver is going to use this? As Daniel mentioned, it's in patch 3. The TTM-based drivers will retrieve the pointer via this function. I do want to see all that being more tightly integrated into TTM, but not in this series. This one is about fixing the bochs-on-sparc64 problem for good. Patch 7 adds an update to TTM to the DRM TODO list. Best regards Thomas > > Regards, > Christian. > >> >> Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx> >> --- >> include/drm/ttm/ttm_bo_api.h | 24 ++++++++++++++++++++++++ >> include/linux/dma-buf-map.h | 20 ++++++++++++++++++++ >> 2 files changed, 44 insertions(+) >> >> diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h >> index c96a25d571c8..62d89f05a801 100644 >> --- a/include/drm/ttm/ttm_bo_api.h >> +++ b/include/drm/ttm/ttm_bo_api.h >> @@ -34,6 +34,7 @@ >> #include <drm/drm_gem.h> >> #include <drm/drm_hashtab.h> >> #include <drm/drm_vma_manager.h> >> +#include <linux/dma-buf-map.h> >> #include <linux/kref.h> >> #include <linux/list.h> >> #include <linux/wait.h> >> @@ -486,6 +487,29 @@ static inline void *ttm_kmap_obj_virtual(struct >> ttm_bo_kmap_obj *map, >> return map->virtual; >> } >> +/** >> + * ttm_kmap_obj_to_dma_buf_map >> + * >> + * @kmap: A struct ttm_bo_kmap_obj returned from ttm_bo_kmap. >> + * @map: Returns the mapping as struct dma_buf_map >> + * >> + * Converts struct ttm_bo_kmap_obj to struct dma_buf_map. If the memory >> + * is not mapped, the returned mapping is initialized to NULL. >> + */ >> +static inline void ttm_kmap_obj_to_dma_buf_map(struct ttm_bo_kmap_obj >> *kmap, >> + struct dma_buf_map *map) >> +{ >> + bool is_iomem; >> + void *vaddr = ttm_kmap_obj_virtual(kmap, &is_iomem); >> + >> + if (!vaddr) >> + dma_buf_map_clear(map); >> + else if (is_iomem) >> + dma_buf_map_set_vaddr_iomem(map, (void __force __iomem *)vaddr); >> + else >> + dma_buf_map_set_vaddr(map, vaddr); >> +} >> + >> /** >> * ttm_bo_kmap >> * >> diff --git a/include/linux/dma-buf-map.h b/include/linux/dma-buf-map.h >> index fd1aba545fdf..2e8bbecb5091 100644 >> --- a/include/linux/dma-buf-map.h >> +++ b/include/linux/dma-buf-map.h >> @@ -45,6 +45,12 @@ >> * >> * dma_buf_map_set_vaddr(&map. 0xdeadbeaf); >> * >> + * To set an address in I/O memory, use dma_buf_map_set_vaddr_iomem(). >> + * >> + * .. code-block:: c >> + * >> + * dma_buf_map_set_vaddr_iomem(&map. 0xdeadbeaf); >> + * >> * Test if a mapping is valid with either dma_buf_map_is_set() or >> * dma_buf_map_is_null(). >> * >> @@ -118,6 +124,20 @@ static inline void dma_buf_map_set_vaddr(struct >> dma_buf_map *map, void *vaddr) >> map->is_iomem = false; >> } >> +/** >> + * dma_buf_map_set_vaddr_iomem - Sets a dma-buf mapping structure to >> an address in I/O memory >> + * @map: The dma-buf mapping structure >> + * @vaddr_iomem: An I/O-memory address >> + * >> + * Sets the address and the I/O-memory flag. >> + */ >> +static inline void dma_buf_map_set_vaddr_iomem(struct dma_buf_map *map, >> + void __iomem *vaddr_iomem) >> +{ >> + map->vaddr_iomem = vaddr_iomem; >> + map->is_iomem = true; >> +} >> + >> /** >> * dma_buf_map_is_equal - Compares two dma-buf mapping structures >> for equality >> * @lhs: The dma-buf mapping structure > > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > https://lists.freedesktop.org/mailman/listinfo/dri-devel -- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nürnberg, Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Felix Imendörffer
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