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