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
 26static void
 27gf100_pci_msi_rearm(struct nvkm_pci *pci)
 28{
 29	nvkm_pci_wr08(pci, 0x0704, 0xff);
 30}
 31
 32void
 33gf100_pcie_set_version(struct nvkm_pci *pci, u8 ver)
 34{
 35	struct nvkm_device *device = pci->subdev.device;
 36	nvkm_mask(device, 0x02241c, 0x1, ver > 1 ? 1 : 0);
 37}
 38
 39int
 40gf100_pcie_version(struct nvkm_pci *pci)
 41{
 42	struct nvkm_device *device = pci->subdev.device;
 43	return (nvkm_rd32(device, 0x02241c) & 0x1) + 1;
 44}
 45
 46void
 47gf100_pcie_set_cap_speed(struct nvkm_pci *pci, bool full_speed)
 48{
 49	struct nvkm_device *device = pci->subdev.device;
 50	nvkm_mask(device, 0x02241c, 0x80, full_speed ? 0x80 : 0x0);
 51}
 52
 53int
 54gf100_pcie_cap_speed(struct nvkm_pci *pci)
 55{
 56	struct nvkm_device *device = pci->subdev.device;
 57	u8 punits_pci_cap_speed = nvkm_rd32(device, 0x02241c) & 0x80;
 58	if (punits_pci_cap_speed == 0x80)
 59		return 1;
 60	return 0;
 61}
 62
 63int
 64gf100_pcie_init(struct nvkm_pci *pci)
 65{
 66	bool full_speed = g84_pcie_cur_speed(pci) == NVKM_PCIE_SPEED_5_0;
 67	gf100_pcie_set_cap_speed(pci, full_speed);
 68	return 0;
 69}
 70
 71int
 72gf100_pcie_set_link(struct nvkm_pci *pci, enum nvkm_pcie_speed speed, u8 width)
 73{
 74	gf100_pcie_set_cap_speed(pci, speed == NVKM_PCIE_SPEED_5_0);
 75	g84_pcie_set_link_speed(pci, speed);
 76	return 0;
 77}
 78
 79static const struct nvkm_pci_func
 80gf100_pci_func = {
 81	.init = g84_pci_init,
 82	.rd32 = nv40_pci_rd32,
 83	.wr08 = nv40_pci_wr08,
 84	.wr32 = nv40_pci_wr32,
 85	.msi_rearm = gf100_pci_msi_rearm,
 86
 87	.pcie.init = gf100_pcie_init,
 88	.pcie.set_link = gf100_pcie_set_link,
 89
 90	.pcie.max_speed = g84_pcie_max_speed,
 91	.pcie.cur_speed = g84_pcie_cur_speed,
 92
 93	.pcie.set_version = gf100_pcie_set_version,
 94	.pcie.version = gf100_pcie_version,
 95	.pcie.version_supported = g92_pcie_version_supported,
 96};
 97
 98int
 99gf100_pci_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
100	      struct nvkm_pci **ppci)
101{
102	return nvkm_pci_new_(&gf100_pci_func, device, type, inst, ppci);
103}