1 // SPDX-License-Identifier: MIT 2 #include <linux/pagemap.h> 3 #include <linux/slab.h> 4 #include <drm/ttm/ttm_tt.h> 5 6 #include "nouveau_drv.h" 7 #include "nouveau_mem.h" 8 #include "nouveau_ttm.h" 9 #include "nouveau_bo.h" 10 11 struct nouveau_sgdma_be { 12 /* this has to be the first field so populate/unpopulated in 13 * nouve_bo.c works properly, otherwise have to move them here 14 */ 15 struct ttm_tt ttm; 16 struct nouveau_mem *mem; 17 }; 18 19 void 20 nouveau_sgdma_destroy(struct ttm_device *bdev, struct ttm_tt *ttm) 21 { 22 struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm; 23 24 if (ttm) { 25 ttm_tt_fini(&nvbe->ttm); 26 kfree(nvbe); 27 } 28 } 29 30 int 31 nouveau_sgdma_bind(struct ttm_device *bdev, struct ttm_tt *ttm, struct ttm_resource *reg) 32 { 33 struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm; 34 struct nouveau_drm *drm = nouveau_bdev(bdev); 35 struct nouveau_mem *mem = nouveau_mem(reg); 36 int ret; 37 38 if (nvbe->mem) 39 return 0; 40 41 ret = nouveau_mem_host(reg, &nvbe->ttm); 42 if (ret) 43 return ret; 44 45 if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA) { 46 ret = nouveau_mem_map(mem, &mem->cli->vmm.vmm, &mem->vma[0]); 47 if (ret) { 48 nouveau_mem_fini(mem); 49 return ret; 50 } 51 } 52 53 nvbe->mem = mem; 54 return 0; 55 } 56 57 void 58 nouveau_sgdma_unbind(struct ttm_device *bdev, struct ttm_tt *ttm) 59 { 60 struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm; 61 if (nvbe->mem) { 62 nouveau_mem_fini(nvbe->mem); 63 nvbe->mem = NULL; 64 } 65 } 66 67 struct ttm_tt * 68 nouveau_sgdma_create_ttm(struct ttm_buffer_object *bo, uint32_t page_flags) 69 { 70 struct nouveau_drm *drm = nouveau_bdev(bo->bdev); 71 struct nouveau_bo *nvbo = nouveau_bo(bo); 72 struct nouveau_sgdma_be *nvbe; 73 enum ttm_caching caching; 74 75 if (nvbo->force_coherent) 76 caching = ttm_uncached; 77 else if (drm->agp.bridge) 78 caching = ttm_write_combined; 79 else 80 caching = ttm_cached; 81 82 nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL); 83 if (!nvbe) 84 return NULL; 85 86 if (ttm_sg_tt_init(&nvbe->ttm, bo, page_flags, caching)) { 87 kfree(nvbe); 88 return NULL; 89 } 90 return &nvbe->ttm; 91 } 92