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| author |   Qiang Yu <yuq825@gmail.com> | 2020-01-16 21:11:54 +0800 |
|---|---|---|
| committer | Qiang Yu <yuq825@gmail.com> | 2020-01-27 22:00:48 +0800 |
| commit | dc76cb7a1fd195348100c2a87eb1d55d2a7ddd09 (patch) | |
| tree | ceee735e051b8eaa7b9f313def282f68fdbde041 /drivers/gpu/drm/lima | |
| parent | drm/lima: update register info (diff) | |
| download | linux-dev-dc76cb7a1fd195348100c2a87eb1d55d2a7ddd09.tar.xz linux-dev-dc76cb7a1fd195348100c2a87eb1d55d2a7ddd09.zip | |
drm/lima: add lima_vm_map_bo
For dynamically mapping added backup memory of lima_bo to vm.
This is a preparation for adding heap buffer support.
Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>
Tested-by: Andreas Baierl <ichgeh@imkreisrum.de>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200116131157.13346-3-yuq825@gmail.com
Diffstat (limited to 'drivers/gpu/drm/lima')
| -rw-r--r-- | drivers/gpu/drm/lima/lima_vm.c | 42 | ||||
| -rw-r--r-- | drivers/gpu/drm/lima/lima_vm.h | 1 |
2 files changed, 43 insertions, 0 deletions
diff --git a/drivers/gpu/drm/lima/lima_vm.c b/drivers/gpu/drm/lima/lima_vm.c index 840e2350d872..2e513841de6c 100644 --- a/drivers/gpu/drm/lima/lima_vm.c +++ b/drivers/gpu/drm/lima/lima_vm.c @@ -277,3 +277,45 @@ void lima_vm_print(struct lima_vm *vm) } } } + +int lima_vm_map_bo(struct lima_vm *vm, struct lima_bo *bo, int pageoff) +{ + struct lima_bo_va *bo_va; + struct sg_dma_page_iter sg_iter; + int offset = 0, err; + u32 base; + + mutex_lock(&bo->lock); + + bo_va = lima_vm_bo_find(vm, bo); + if (!bo_va) { + err = -ENOENT; + goto err_out0; + } + + mutex_lock(&vm->lock); + + base = bo_va->node.start + (pageoff << PAGE_SHIFT); + for_each_sg_dma_page(bo->base.sgt->sgl, &sg_iter, + bo->base.sgt->nents, pageoff) { + err = lima_vm_map_page(vm, sg_page_iter_dma_address(&sg_iter), + base + offset); + if (err) + goto err_out1; + + offset += PAGE_SIZE; + } + + mutex_unlock(&vm->lock); + + mutex_unlock(&bo->lock); + return 0; + +err_out1: + if (offset) + lima_vm_unmap_range(vm, base, base + offset - 1); + mutex_unlock(&vm->lock); +err_out0: + mutex_unlock(&bo->lock); + return err; +} diff --git a/drivers/gpu/drm/lima/lima_vm.h b/drivers/gpu/drm/lima/lima_vm.h index e0bdedcf14dd..22aeec77d84d 100644 --- a/drivers/gpu/drm/lima/lima_vm.h +++ b/drivers/gpu/drm/lima/lima_vm.h @@ -58,5 +58,6 @@ static inline void lima_vm_put(struct lima_vm *vm) } void lima_vm_print(struct lima_vm *vm); +int lima_vm_map_bo(struct lima_vm *vm, struct lima_bo *bo, int pageoff); #endif |