1 /* 2 * Copyright 2015 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 <bskeggs@redhat.com> 23 */ 24 #include "priv.h" 25 26 #include <core/option.h> 27 #include <core/pci.h> 28 #include <subdev/mc.h> 29 30 u32 31 nvkm_pci_rd32(struct nvkm_pci *pci, u16 addr) 32 { 33 return pci->func->rd32(pci, addr); 34 } 35 36 void 37 nvkm_pci_wr08(struct nvkm_pci *pci, u16 addr, u8 data) 38 { 39 pci->func->wr08(pci, addr, data); 40 } 41 42 void 43 nvkm_pci_wr32(struct nvkm_pci *pci, u16 addr, u32 data) 44 { 45 pci->func->wr32(pci, addr, data); 46 } 47 48 void 49 nvkm_pci_rom_shadow(struct nvkm_pci *pci, bool shadow) 50 { 51 u32 data = nvkm_pci_rd32(pci, 0x0050); 52 if (shadow) 53 data |= 0x00000001; 54 else 55 data &= ~0x00000001; 56 nvkm_pci_wr32(pci, 0x0050, data); 57 } 58 59 static irqreturn_t 60 nvkm_pci_intr(int irq, void *arg) 61 { 62 struct nvkm_pci *pci = arg; 63 struct nvkm_mc *mc = pci->subdev.device->mc; 64 bool handled = false; 65 if (likely(mc)) { 66 nvkm_mc_intr_unarm(mc); 67 if (pci->msi) 68 pci->func->msi_rearm(pci); 69 nvkm_mc_intr(mc, &handled); 70 nvkm_mc_intr_rearm(mc); 71 } 72 return handled ? IRQ_HANDLED : IRQ_NONE; 73 } 74 75 static int 76 nvkm_pci_fini(struct nvkm_subdev *subdev, bool suspend) 77 { 78 struct nvkm_pci *pci = nvkm_pci(subdev); 79 if (pci->irq >= 0) { 80 free_irq(pci->irq, pci); 81 pci->irq = -1; 82 }; 83 return 0; 84 } 85 86 static int 87 nvkm_pci_init(struct nvkm_subdev *subdev) 88 { 89 struct nvkm_pci *pci = nvkm_pci(subdev); 90 struct pci_dev *pdev = pci->pdev; 91 int ret; 92 93 ret = request_irq(pdev->irq, nvkm_pci_intr, IRQF_SHARED, "nvkm", pci); 94 if (ret) 95 return ret; 96 97 pci->irq = pdev->irq; 98 return ret; 99 } 100 101 static void * 102 nvkm_pci_dtor(struct nvkm_subdev *subdev) 103 { 104 struct nvkm_pci *pci = nvkm_pci(subdev); 105 if (pci->msi) 106 pci_disable_msi(pci->pdev); 107 return nvkm_pci(subdev); 108 } 109 110 static const struct nvkm_subdev_func 111 nvkm_pci_func = { 112 .dtor = nvkm_pci_dtor, 113 .init = nvkm_pci_init, 114 .fini = nvkm_pci_fini, 115 }; 116 117 int 118 nvkm_pci_new_(const struct nvkm_pci_func *func, struct nvkm_device *device, 119 int index, struct nvkm_pci **ppci) 120 { 121 struct nvkm_pci *pci; 122 123 if (!(pci = *ppci = kzalloc(sizeof(**ppci), GFP_KERNEL))) 124 return -ENOMEM; 125 nvkm_subdev_ctor(&nvkm_pci_func, device, index, 0, &pci->subdev); 126 pci->func = func; 127 pci->pdev = device->func->pci(device)->pdev; 128 pci->irq = -1; 129 130 switch (pci->pdev->device & 0x0ff0) { 131 case 0x00f0: 132 case 0x02e0: 133 /* BR02? NFI how these would be handled yet exactly */ 134 break; 135 default: 136 switch (device->chipset) { 137 case 0xaa: 138 /* reported broken, nv also disable it */ 139 break; 140 default: 141 pci->msi = true; 142 break; 143 } 144 } 145 146 pci->msi = nvkm_boolopt(device->cfgopt, "NvMSI", pci->msi); 147 if (pci->msi && func->msi_rearm) { 148 pci->msi = pci_enable_msi(pci->pdev) == 0; 149 if (pci->msi) 150 nvkm_debug(&pci->subdev, "MSI enabled\n"); 151 } else { 152 pci->msi = false; 153 } 154 155 return 0; 156 } 157