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 nouveau_sgdma_unbind(bdev, ttm); 25 ttm_tt_destroy_common(bdev, ttm); 26 ttm_tt_fini(&nvbe->ttm); 27 kfree(nvbe); 28 } 29 } 30 31 int 32 nouveau_sgdma_bind(struct ttm_device *bdev, struct ttm_tt *ttm, struct ttm_resource *reg) 33 { 34 struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm; 35 struct nouveau_drm *drm = nouveau_bdev(bdev); 36 struct nouveau_mem *mem = nouveau_mem(reg); 37 int ret; 38 39 if (nvbe->mem) 40 return 0; 41 42 ret = nouveau_mem_host(reg, &nvbe->ttm); 43 if (ret) 44 return ret; 45 46 if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA) { 47 ret = nouveau_mem_map(mem, &mem->cli->vmm.vmm, &mem->vma[0]); 48 if (ret) { 49 nouveau_mem_fini(mem); 50 return ret; 51 } 52 } 53 54 nvbe->mem = mem; 55 return 0; 56 } 57 58 void 59 nouveau_sgdma_unbind(struct ttm_device *bdev, struct ttm_tt *ttm) 60 { 61 struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm; 62 if (nvbe->mem) { 63 nouveau_mem_fini(nvbe->mem); 64 nvbe->mem = NULL; 65 } 66 } 67 68 struct ttm_tt * 69 nouveau_sgdma_create_ttm(struct ttm_buffer_object *bo, uint32_t page_flags) 70 { 71 struct nouveau_drm *drm = nouveau_bdev(bo->bdev); 72 struct nouveau_bo *nvbo = nouveau_bo(bo); 73 struct nouveau_sgdma_be *nvbe; 74 enum ttm_caching caching; 75 76 if (nvbo->force_coherent) 77 caching = ttm_uncached; 78 else if (drm->agp.bridge) 79 caching = ttm_write_combined; 80 else 81 caching = ttm_cached; 82 83 nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL); 84 if (!nvbe) 85 return NULL; 86 87 if (ttm_sg_tt_init(&nvbe->ttm, bo, page_flags, caching)) { 88 kfree(nvbe); 89 return NULL; 90 } 91 return &nvbe->ttm; 92 } 93