1/* $NetBSD: nouveau_nvkm_engine_disp_dmacgp102.c,v 1.2 2021/12/18 23:45:35 riastradh Exp $ */ 2 3/* 4 * Copyright 2016 Red Hat Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: Ben Skeggs <bskeggs@redhat.com> 25 */ 26#include <sys/cdefs.h> 27__KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_engine_disp_dmacgp102.c,v 1.2 2021/12/18 23:45:35 riastradh Exp $"); 28 29#include "channv50.h" 30 31#include <subdev/timer.h> 32 33static int 34gp102_disp_dmac_init(struct nv50_disp_chan *chan) 35{ 36 struct nvkm_subdev *subdev = &chan->disp->base.engine.subdev; 37 struct nvkm_device *device = subdev->device; 38 int ctrl = chan->chid.ctrl; 39 int user = chan->chid.user; 40 41 /* initialise channel for dma command submission */ 42 nvkm_wr32(device, 0x611494 + (ctrl * 0x0010), chan->push); 43 nvkm_wr32(device, 0x611498 + (ctrl * 0x0010), 0x00010000); 44 nvkm_wr32(device, 0x61149c + (ctrl * 0x0010), 0x00000001); 45 nvkm_mask(device, 0x610490 + (ctrl * 0x0010), 0x00000010, 0x00000010); 46 nvkm_wr32(device, 0x640000 + (ctrl * 0x1000), 0x00000000); 47 nvkm_wr32(device, 0x610490 + (ctrl * 0x0010), 0x00000013); 48 49 /* wait for it to go inactive */ 50 if (nvkm_msec(device, 2000, 51 if (!(nvkm_rd32(device, 0x610490 + (ctrl * 0x10)) & 0x80000000)) 52 break; 53 ) < 0) { 54 nvkm_error(subdev, "ch %d init: %08x\n", user, 55 nvkm_rd32(device, 0x610490 + (ctrl * 0x10))); 56 return -EBUSY; 57 } 58 59 return 0; 60} 61 62const struct nv50_disp_chan_func 63gp102_disp_dmac_func = { 64 .init = gp102_disp_dmac_init, 65 .fini = gf119_disp_dmac_fini, 66 .intr = gf119_disp_chan_intr, 67 .user = nv50_disp_chan_user, 68 .bind = gf119_disp_dmac_bind, 69}; 70