1 /* 2 * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved. 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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 20 * DEALINGS IN THE SOFTWARE. 21 */ 22 #include <subdev/privring.h> 23 #include <subdev/timer.h> 24 25 static void 26 gk20a_privring_init_privring_ring(struct nvkm_subdev *privring) 27 { 28 struct nvkm_device *device = privring->device; 29 nvkm_mask(device, 0x137250, 0x3f, 0); 30 31 nvkm_mask(device, 0x000200, 0x20, 0); 32 udelay(20); 33 nvkm_mask(device, 0x000200, 0x20, 0x20); 34 35 nvkm_wr32(device, 0x12004c, 0x4); 36 nvkm_wr32(device, 0x122204, 0x2); 37 nvkm_rd32(device, 0x122204); 38 39 /* 40 * Bug: increase clock timeout to avoid operation failure at high 41 * gpcclk rate. 42 */ 43 nvkm_wr32(device, 0x122354, 0x800); 44 nvkm_wr32(device, 0x128328, 0x800); 45 nvkm_wr32(device, 0x124320, 0x800); 46 } 47 48 static void 49 gk20a_privring_intr(struct nvkm_subdev *privring) 50 { 51 struct nvkm_device *device = privring->device; 52 u32 status0 = nvkm_rd32(device, 0x120058); 53 54 if (status0 & 0x7) { 55 nvkm_debug(privring, "resetting privring ring\n"); 56 gk20a_privring_init_privring_ring(privring); 57 } 58 59 /* Acknowledge interrupt */ 60 nvkm_mask(device, 0x12004c, 0x2, 0x2); 61 nvkm_msec(device, 2000, 62 if (!(nvkm_rd32(device, 0x12004c) & 0x0000003f)) 63 break; 64 ); 65 } 66 67 static int 68 gk20a_privring_init(struct nvkm_subdev *privring) 69 { 70 gk20a_privring_init_privring_ring(privring); 71 return 0; 72 } 73 74 static const struct nvkm_subdev_func 75 gk20a_privring = { 76 .init = gk20a_privring_init, 77 .intr = gk20a_privring_intr, 78 }; 79 80 int 81 gk20a_privring_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, 82 struct nvkm_subdev **pprivring) 83 { 84 return nvkm_subdev_new_(&gk20a_privring, device, type, inst, pprivring); 85 } 86