1 /* 2 * Copyright 2012 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 * Authors: Ben Skeggs 23 */ 24 #include "nv31.h" 25 26 #include <subdev/instmem.h> 27 28 #include <nvif/class.h> 29 30 bool 31 nv40_mpeg_mthd_dma(struct nvkm_device *device, u32 mthd, u32 data) 32 { 33 struct nvkm_instmem *imem = device->imem; 34 struct nv31_mpeg *mpeg = nv31_mpeg(device->mpeg); 35 struct nvkm_subdev *subdev = &mpeg->engine.subdev; 36 u32 inst = data << 4; 37 u32 dma0 = nvkm_instmem_rd32(imem, inst + 0); 38 u32 dma1 = nvkm_instmem_rd32(imem, inst + 4); 39 u32 dma2 = nvkm_instmem_rd32(imem, inst + 8); 40 u32 base = (dma2 & 0xfffff000) | (dma0 >> 20); 41 u32 size = dma1 + 1; 42 43 /* only allow linear DMA objects */ 44 if (!(dma0 & 0x00002000)) { 45 nvkm_error(subdev, "inst %08x dma0 %08x dma1 %08x dma2 %08x\n", 46 inst, dma0, dma1, dma2); 47 return false; 48 } 49 50 if (mthd == 0x0190) { 51 /* DMA_CMD */ 52 nvkm_mask(device, 0x00b300, 0x00030000, (dma0 & 0x00030000)); 53 nvkm_wr32(device, 0x00b334, base); 54 nvkm_wr32(device, 0x00b324, size); 55 } else 56 if (mthd == 0x01a0) { 57 /* DMA_DATA */ 58 nvkm_mask(device, 0x00b300, 0x000c0000, (dma0 & 0x00030000) << 2); 59 nvkm_wr32(device, 0x00b360, base); 60 nvkm_wr32(device, 0x00b364, size); 61 } else { 62 /* DMA_IMAGE, VRAM only */ 63 if (dma0 & 0x00030000) 64 return false; 65 66 nvkm_wr32(device, 0x00b370, base); 67 nvkm_wr32(device, 0x00b374, size); 68 } 69 70 return true; 71 } 72 73 static const struct nv31_mpeg_func 74 nv40_mpeg = { 75 .mthd_dma = nv40_mpeg_mthd_dma, 76 }; 77 78 int 79 nv40_mpeg_new(struct nvkm_device *device, int index, struct nvkm_engine **pmpeg) 80 { 81 return nv31_mpeg_new_(&nv40_mpeg, device, index, pmpeg); 82 } 83