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 static inline void 29 nvkm_mc_unk260(struct nvkm_mc *mc, u32 data) 30 { 31 const struct nvkm_mc_oclass *impl = (void *)nv_oclass(mc); 32 if (impl->unk260) 33 impl->unk260(mc, data); 34 } 35 36 static inline u32 37 nvkm_mc_intr_mask(struct nvkm_mc *mc) 38 { 39 u32 intr = nv_rd32(mc, 0x000100); 40 if (intr == 0xffffffff) /* likely fallen off the bus */ 41 intr = 0x00000000; 42 return intr; 43 } 44 45 static irqreturn_t 46 nvkm_mc_intr(int irq, void *arg) 47 { 48 struct nvkm_mc *mc = arg; 49 const struct nvkm_mc_oclass *oclass = (void *)nv_object(mc)->oclass; 50 const struct nvkm_mc_intr *map = oclass->intr; 51 struct nvkm_subdev *unit; 52 u32 intr; 53 54 nv_wr32(mc, 0x000140, 0x00000000); 55 nv_rd32(mc, 0x000140); 56 intr = nvkm_mc_intr_mask(mc); 57 if (mc->use_msi) 58 oclass->msi_rearm(mc); 59 60 if (intr) { 61 u32 stat = intr = nvkm_mc_intr_mask(mc); 62 while (map->stat) { 63 if (intr & map->stat) { 64 unit = nvkm_subdev(mc, map->unit); 65 if (unit && unit->intr) 66 unit->intr(unit); 67 stat &= ~map->stat; 68 } 69 map++; 70 } 71 72 if (stat) 73 nv_error(mc, "unknown intr 0x%08x\n", stat); 74 } 75 76 nv_wr32(mc, 0x000140, 0x00000001); 77 return intr ? IRQ_HANDLED : IRQ_NONE; 78 } 79 80 int 81 _nvkm_mc_fini(struct nvkm_object *object, bool suspend) 82 { 83 struct nvkm_mc *mc = (void *)object; 84 nv_wr32(mc, 0x000140, 0x00000000); 85 return nvkm_subdev_fini(&mc->subdev, suspend); 86 } 87 88 int 89 _nvkm_mc_init(struct nvkm_object *object) 90 { 91 struct nvkm_mc *mc = (void *)object; 92 int ret = nvkm_subdev_init(&mc->subdev); 93 if (ret) 94 return ret; 95 nv_wr32(mc, 0x000140, 0x00000001); 96 return 0; 97 } 98 99 void 100 _nvkm_mc_dtor(struct nvkm_object *object) 101 { 102 struct nvkm_device *device = nv_device(object); 103 struct nvkm_mc *mc = (void *)object; 104 free_irq(mc->irq, mc); 105 if (mc->use_msi) 106 pci_disable_msi(device->pdev); 107 nvkm_subdev_destroy(&mc->subdev); 108 } 109 110 int 111 nvkm_mc_create_(struct nvkm_object *parent, struct nvkm_object *engine, 112 struct nvkm_oclass *bclass, int length, void **pobject) 113 { 114 const struct nvkm_mc_oclass *oclass = (void *)bclass; 115 struct nvkm_device *device = nv_device(parent); 116 struct nvkm_mc *mc; 117 int ret; 118 119 ret = nvkm_subdev_create_(parent, engine, bclass, 0, "PMC", 120 "master", length, pobject); 121 mc = *pobject; 122 if (ret) 123 return ret; 124 125 mc->unk260 = nvkm_mc_unk260; 126 127 if (nv_device_is_pci(device)) { 128 switch (device->pdev->device & 0x0ff0) { 129 case 0x00f0: 130 case 0x02e0: 131 /* BR02? NFI how these would be handled yet exactly */ 132 break; 133 default: 134 switch (device->chipset) { 135 case 0xaa: 136 /* reported broken, nv also disable it */ 137 break; 138 default: 139 mc->use_msi = true; 140 break; 141 } 142 } 143 144 mc->use_msi = nvkm_boolopt(device->cfgopt, "NvMSI", 145 mc->use_msi); 146 147 if (mc->use_msi && oclass->msi_rearm) { 148 mc->use_msi = pci_enable_msi(device->pdev) == 0; 149 if (mc->use_msi) { 150 nv_info(mc, "MSI interrupts enabled\n"); 151 oclass->msi_rearm(mc); 152 } 153 } else { 154 mc->use_msi = false; 155 } 156 } 157 158 ret = nv_device_get_irq(device, true); 159 if (ret < 0) 160 return ret; 161 mc->irq = ret; 162 163 ret = request_irq(mc->irq, nvkm_mc_intr, IRQF_SHARED, "nvkm", mc); 164 if (ret < 0) 165 return ret; 166 167 return 0; 168 } 169