| // SPDX-License-Identifier: MIT |
| #include <linux/pagemap.h> |
| #include <linux/slab.h> |
| |
| #include "nouveau_drv.h" |
| #include "nouveau_mem.h" |
| #include "nouveau_ttm.h" |
| |
| struct nouveau_sgdma_be { |
| /* this has to be the first field so populate/unpopulated in |
| * nouve_bo.c works properly, otherwise have to move them here |
| */ |
| struct ttm_dma_tt ttm; |
| struct nouveau_mem *mem; |
| }; |
| |
| static void |
| nouveau_sgdma_destroy(struct ttm_tt *ttm) |
| { |
| struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm; |
| |
| if (ttm) { |
| ttm_dma_tt_fini(&nvbe->ttm); |
| kfree(nvbe); |
| } |
| } |
| |
| static int |
| nv04_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *reg) |
| { |
| struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm; |
| struct nouveau_mem *mem = nouveau_mem(reg); |
| int ret; |
| |
| ret = nouveau_mem_host(reg, &nvbe->ttm); |
| if (ret) |
| return ret; |
| |
| ret = nouveau_mem_map(mem, &mem->cli->vmm.vmm, &mem->vma[0]); |
| if (ret) { |
| nouveau_mem_fini(mem); |
| return ret; |
| } |
| |
| nvbe->mem = mem; |
| return 0; |
| } |
| |
| static void |
| nv04_sgdma_unbind(struct ttm_tt *ttm) |
| { |
| struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm; |
| nouveau_mem_fini(nvbe->mem); |
| } |
| |
| static struct ttm_backend_func nv04_sgdma_backend = { |
| .bind = nv04_sgdma_bind, |
| .unbind = nv04_sgdma_unbind, |
| .destroy = nouveau_sgdma_destroy |
| }; |
| |
| static int |
| nv50_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *reg) |
| { |
| struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm; |
| struct nouveau_mem *mem = nouveau_mem(reg); |
| int ret; |
| |
| ret = nouveau_mem_host(reg, &nvbe->ttm); |
| if (ret) |
| return ret; |
| |
| nvbe->mem = mem; |
| return 0; |
| } |
| |
| static struct ttm_backend_func nv50_sgdma_backend = { |
| .bind = nv50_sgdma_bind, |
| .unbind = nv04_sgdma_unbind, |
| .destroy = nouveau_sgdma_destroy |
| }; |
| |
| struct ttm_tt * |
| nouveau_sgdma_create_ttm(struct ttm_buffer_object *bo, uint32_t page_flags) |
| { |
| struct nouveau_drm *drm = nouveau_bdev(bo->bdev); |
| struct nouveau_sgdma_be *nvbe; |
| |
| nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL); |
| if (!nvbe) |
| return NULL; |
| |
| if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA) |
| nvbe->ttm.ttm.func = &nv04_sgdma_backend; |
| else |
| nvbe->ttm.ttm.func = &nv50_sgdma_backend; |
| |
| if (ttm_dma_tt_init(&nvbe->ttm, bo, page_flags)) { |
| kfree(nvbe); |
| return NULL; |
| } |
| return &nvbe->ttm.ttm; |
| } |