subdev/pci/nv46.c

0001 /*
0002  * Copyright 2015 Red Hat Inc.
0003  *
0004  * Permission is hereby granted, free of charge, to any person obtaining a
0005  * copy of this software and associated documentation files (the "Software"),
0006  * to deal in the Software without restriction, including without limitation
0007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0008  * and/or sell copies of the Software, and to permit persons to whom the
0009  * Software is furnished to do so, subject to the following conditions:
0010  *
0011  * The above copyright notice and this permission notice shall be included in
0012  * all copies or substantial portions of the Software.
0013  *
0014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0017  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
0018  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
0019  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
0020  * OTHER DEALINGS IN THE SOFTWARE.
0021  *
0022  * Authors: Ben Skeggs <bskeggs@redhat.com>
0023  */
0024 #include "priv.h"
0025
0026 #include <core/pci.h>
0027
0028 /* MSI re-arm through the PRI appears to be broken on NV46/NV50/G84/G86/G92,
0029  * so we access it via alternate PCI config space mechanisms.
0030  */
0031 void
0032 nv46_pci_msi_rearm(struct nvkm_pci *pci)
0033 {
0034     struct nvkm_device *device = pci->subdev.device;
0035     struct pci_dev *pdev = device->func->pci(device)->pdev;
0036     pci_write_config_byte(pdev, 0x68, 0xff);
0037 }
0038
0039 static const struct nvkm_pci_func
0040 nv46_pci_func = {
0041     .rd32 = nv40_pci_rd32,
0042     .wr08 = nv40_pci_wr08,
0043     .wr32 = nv40_pci_wr32,
0044     .msi_rearm = nv46_pci_msi_rearm,
0045 };
0046
0047 int
0048 nv46_pci_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
0049          struct nvkm_pci **ppci)
0050 {
0051     return nvkm_pci_new_(&nv46_pci_func, device, type, inst, ppci);
0052 }