1 /* 2 * Copyright 2017 Red Hat Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 */ 22 #include "vmm.h" 23 24 static const struct nvkm_vmm_desc_func 25 nv44_vmm_desc_pgt = { 26 }; 27 28 static const struct nvkm_vmm_desc 29 nv44_vmm_desc_12[] = { 30 { PGT, 17, 4, 0x80000, &nv44_vmm_desc_pgt }, 31 {} 32 }; 33 34 static const struct nvkm_vmm_func 35 nv44_vmm = { 36 .page = { 37 { 12, &nv44_vmm_desc_12[0], NVKM_VMM_PAGE_HOST }, 38 {} 39 } 40 }; 41 42 int 43 nv44_vmm_new(struct nvkm_mmu *mmu, u64 addr, u64 size, void *argv, u32 argc, 44 struct lock_class_key *key, const char *name, 45 struct nvkm_vmm **pvmm) 46 { 47 struct nvkm_subdev *subdev = &mmu->subdev; 48 struct nvkm_vmm *vmm; 49 int ret; 50 51 ret = nv04_vmm_new_(&nv44_vmm, mmu, 0, addr, size, 52 argv, argc, key, name, &vmm); 53 *pvmm = vmm; 54 if (ret) 55 return ret; 56 57 vmm->nullp = dma_alloc_coherent(subdev->device->dev, 16 * 1024, 58 &vmm->null, GFP_KERNEL); 59 if (!vmm->nullp) { 60 nvkm_warn(subdev, "unable to allocate dummy pages\n"); 61 vmm->null = 0; 62 } 63 64 return 0; 65 } 66