subdev/pci/gf100.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 static void
0027 gf100_pci_msi_rearm(struct nvkm_pci *pci)
0028 {
0029     nvkm_pci_wr08(pci, 0x0704, 0xff);
0030 }
0031
0032 void
0033 gf100_pcie_set_version(struct nvkm_pci *pci, u8 ver)
0034 {
0035     struct nvkm_device *device = pci->subdev.device;
0036     nvkm_mask(device, 0x02241c, 0x1, ver > 1 ? 1 : 0);
0037 }
0038
0039 int
0040 gf100_pcie_version(struct nvkm_pci *pci)
0041 {
0042     struct nvkm_device *device = pci->subdev.device;
0043     return (nvkm_rd32(device, 0x02241c) & 0x1) + 1;
0044 }
0045
0046 void
0047 gf100_pcie_set_cap_speed(struct nvkm_pci *pci, bool full_speed)
0048 {
0049     struct nvkm_device *device = pci->subdev.device;
0050     nvkm_mask(device, 0x02241c, 0x80, full_speed ? 0x80 : 0x0);
0051 }
0052
0053 int
0054 gf100_pcie_cap_speed(struct nvkm_pci *pci)
0055 {
0056     struct nvkm_device *device = pci->subdev.device;
0057     u8 punits_pci_cap_speed = nvkm_rd32(device, 0x02241c) & 0x80;
0058     if (punits_pci_cap_speed == 0x80)
0059         return 1;
0060     return 0;
0061 }
0062
0063 int
0064 gf100_pcie_init(struct nvkm_pci *pci)
0065 {
0066     bool full_speed = g84_pcie_cur_speed(pci) == NVKM_PCIE_SPEED_5_0;
0067     gf100_pcie_set_cap_speed(pci, full_speed);
0068     return 0;
0069 }
0070
0071 int
0072 gf100_pcie_set_link(struct nvkm_pci *pci, enum nvkm_pcie_speed speed, u8 width)
0073 {
0074     gf100_pcie_set_cap_speed(pci, speed == NVKM_PCIE_SPEED_5_0);
0075     g84_pcie_set_link_speed(pci, speed);
0076     return 0;
0077 }
0078
0079 static const struct nvkm_pci_func
0080 gf100_pci_func = {
0081     .init = g84_pci_init,
0082     .rd32 = nv40_pci_rd32,
0083     .wr08 = nv40_pci_wr08,
0084     .wr32 = nv40_pci_wr32,
0085     .msi_rearm = gf100_pci_msi_rearm,
0086
0087     .pcie.init = gf100_pcie_init,
0088     .pcie.set_link = gf100_pcie_set_link,
0089
0090     .pcie.max_speed = g84_pcie_max_speed,
0091     .pcie.cur_speed = g84_pcie_cur_speed,
0092
0093     .pcie.set_version = gf100_pcie_set_version,
0094     .pcie.version = gf100_pcie_version,
0095     .pcie.version_supported = g92_pcie_version_supported,
0096 };
0097
0098 int
0099 gf100_pci_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
0100           struct nvkm_pci **ppci)
0101 {
0102     return nvkm_pci_new_(&gf100_pci_func, device, type, inst, ppci);
0103 }