nv46.c

 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	.cfg = { .addr = 0x088000, .size = 0x1000 },
42	.msi_rearm = nv46_pci_msi_rearm,
43};
44
45int
46nv46_pci_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
47	     struct nvkm_pci **ppci)
48{
49	return nvkm_pci_new_(&nv46_pci_func, device, type, inst, ppci);
50}