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 "priv.h" 25 26 #include <core/option.h> 27 28 void 29 nvkm_mc_unk260(struct nvkm_mc *mc, u32 data) 30 { 31 if (mc->func->unk260) 32 mc->func->unk260(mc, data); 33 } 34 35 void 36 nvkm_mc_intr_unarm(struct nvkm_mc *mc) 37 { 38 return mc->func->intr_unarm(mc); 39 } 40 41 void 42 nvkm_mc_intr_rearm(struct nvkm_mc *mc) 43 { 44 return mc->func->intr_rearm(mc); 45 } 46 47 static u32 48 nvkm_mc_intr_mask(struct nvkm_mc *mc) 49 { 50 u32 intr = mc->func->intr_mask(mc); 51 if (WARN_ON_ONCE(intr == 0xffffffff)) 52 intr = 0; /* likely fallen off the bus */ 53 return intr; 54 } 55 56 void 57 nvkm_mc_intr(struct nvkm_mc *mc, bool *handled) 58 { 59 struct nvkm_device *device = mc->subdev.device; 60 struct nvkm_subdev *subdev; 61 const struct nvkm_mc_intr *map = mc->func->intr; 62 u32 stat, intr; 63 64 stat = intr = nvkm_mc_intr_mask(mc); 65 while (map->stat) { 66 if (intr & map->stat) { 67 subdev = nvkm_device_subdev(device, map->unit); 68 if (subdev) 69 nvkm_subdev_intr(subdev); 70 stat &= ~map->stat; 71 } 72 map++; 73 } 74 75 if (stat) 76 nvkm_error(&mc->subdev, "intr %08x\n", stat); 77 *handled = intr != 0; 78 } 79 80 static int 81 nvkm_mc_fini(struct nvkm_subdev *subdev, bool suspend) 82 { 83 struct nvkm_mc *mc = nvkm_mc(subdev); 84 nvkm_mc_intr_unarm(mc); 85 return 0; 86 } 87 88 static int 89 nvkm_mc_init(struct nvkm_subdev *subdev) 90 { 91 struct nvkm_mc *mc = nvkm_mc(subdev); 92 if (mc->func->init) 93 mc->func->init(mc); 94 nvkm_mc_intr_rearm(mc); 95 return 0; 96 } 97 98 static void * 99 nvkm_mc_dtor(struct nvkm_subdev *subdev) 100 { 101 return nvkm_mc(subdev); 102 } 103 104 static const struct nvkm_subdev_func 105 nvkm_mc = { 106 .dtor = nvkm_mc_dtor, 107 .init = nvkm_mc_init, 108 .fini = nvkm_mc_fini, 109 }; 110 111 int 112 nvkm_mc_new_(const struct nvkm_mc_func *func, struct nvkm_device *device, 113 int index, struct nvkm_mc **pmc) 114 { 115 struct nvkm_mc *mc; 116 117 if (!(mc = *pmc = kzalloc(sizeof(*mc), GFP_KERNEL))) 118 return -ENOMEM; 119 120 nvkm_subdev_ctor(&nvkm_mc, device, index, 0, &mc->subdev); 121 mc->func = func; 122 return 0; 123 } 124