nv46.c (1894B)
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/pci.h> 27 28/* MSI re-arm through the PRI appears to be broken on NV46/NV50/G84/G86/G92, 29 * so we access it via alternate PCI config space mechanisms. 30 */ 31void 32nv46_pci_msi_rearm(struct nvkm_pci *pci) 33{ 34 struct nvkm_device *device = pci->subdev.device; 35 struct pci_dev *pdev = device->func->pci(device)->pdev; 36 pci_write_config_byte(pdev, 0x68, 0xff); 37} 38 39static const struct nvkm_pci_func 40nv46_pci_func = { 41 .rd32 = nv40_pci_rd32, 42 .wr08 = nv40_pci_wr08, 43 .wr32 = nv40_pci_wr32, 44 .msi_rearm = nv46_pci_msi_rearm, 45}; 46 47int 48nv46_pci_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, 49 struct nvkm_pci **ppci) 50{ 51 return nvkm_pci_new_(&nv46_pci_func, device, type, inst, ppci); 52}