1 /* $NetBSD: nouveau_nvkm_subdev_pci_nv46.c,v 1.3 2021/12/18 23:45:41 riastradh Exp $ */
2
3 /*
4 * Copyright 2015 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Ben Skeggs <bskeggs@redhat.com>
25 */
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_pci_nv46.c,v 1.3 2021/12/18 23:45:41 riastradh Exp $");
28
29 #include "priv.h"
30
31 #include <core/pci.h>
32
33 /* MSI re-arm through the PRI appears to be broken on NV46/NV50/G84/G86/G92,
34 * so we access it via alternate PCI config space mechanisms.
35 */
36 void
nv46_pci_msi_rearm(struct nvkm_pci * pci)37 nv46_pci_msi_rearm(struct nvkm_pci *pci)
38 {
39 struct nvkm_device *device = pci->subdev.device;
40 struct pci_dev *pdev = device->func->pci(device)->pdev;
41 pci_write_config_byte(pdev, 0x68, 0xff);
42 }
43
44 static const struct nvkm_pci_func
45 nv46_pci_func = {
46 .rd32 = nv40_pci_rd32,
47 .wr08 = nv40_pci_wr08,
48 .wr32 = nv40_pci_wr32,
49 .msi_rearm = nv46_pci_msi_rearm,
50 };
51
52 int
nv46_pci_new(struct nvkm_device * device,int index,struct nvkm_pci ** ppci)53 nv46_pci_new(struct nvkm_device *device, int index, struct nvkm_pci **ppci)
54 {
55 return nvkm_pci_new_(&nv46_pci_func, device, index, ppci);
56 }
57