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      1 /*	$NetBSD: nouveau_nvkm_subdev_pci_gf100.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 (at) redhat.com>
     25  */
     26 #include <sys/cdefs.h>
     27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_pci_gf100.c,v 1.3 2021/12/18 23:45:41 riastradh Exp $");
     28 
     29 #include "priv.h"
     30 
     31 static void
     32 gf100_pci_msi_rearm(struct nvkm_pci *pci)
     33 {
     34 	nvkm_pci_wr08(pci, 0x0704, 0xff);
     35 }
     36 
     37 void
     38 gf100_pcie_set_version(struct nvkm_pci *pci, u8 ver)
     39 {
     40 	struct nvkm_device *device = pci->subdev.device;
     41 	nvkm_mask(device, 0x02241c, 0x1, ver > 1 ? 1 : 0);
     42 }
     43 
     44 int
     45 gf100_pcie_version(struct nvkm_pci *pci)
     46 {
     47 	struct nvkm_device *device = pci->subdev.device;
     48 	return (nvkm_rd32(device, 0x02241c) & 0x1) + 1;
     49 }
     50 
     51 void
     52 gf100_pcie_set_cap_speed(struct nvkm_pci *pci, bool full_speed)
     53 {
     54 	struct nvkm_device *device = pci->subdev.device;
     55 	nvkm_mask(device, 0x02241c, 0x80, full_speed ? 0x80 : 0x0);
     56 }
     57 
     58 int
     59 gf100_pcie_cap_speed(struct nvkm_pci *pci)
     60 {
     61 	struct nvkm_device *device = pci->subdev.device;
     62 	u8 punits_pci_cap_speed = nvkm_rd32(device, 0x02241c) & 0x80;
     63 	if (punits_pci_cap_speed == 0x80)
     64 		return 1;
     65 	return 0;
     66 }
     67 
     68 int
     69 gf100_pcie_init(struct nvkm_pci *pci)
     70 {
     71 	bool full_speed = g84_pcie_cur_speed(pci) == NVKM_PCIE_SPEED_5_0;
     72 	gf100_pcie_set_cap_speed(pci, full_speed);
     73 	return 0;
     74 }
     75 
     76 int
     77 gf100_pcie_set_link(struct nvkm_pci *pci, enum nvkm_pcie_speed speed, u8 width)
     78 {
     79 	gf100_pcie_set_cap_speed(pci, speed == NVKM_PCIE_SPEED_5_0);
     80 	g84_pcie_set_link_speed(pci, speed);
     81 	return 0;
     82 }
     83 
     84 static const struct nvkm_pci_func
     85 gf100_pci_func = {
     86 	.init = g84_pci_init,
     87 	.rd32 = nv40_pci_rd32,
     88 	.wr08 = nv40_pci_wr08,
     89 	.wr32 = nv40_pci_wr32,
     90 	.msi_rearm = gf100_pci_msi_rearm,
     91 
     92 	.pcie.init = gf100_pcie_init,
     93 	.pcie.set_link = gf100_pcie_set_link,
     94 
     95 	.pcie.max_speed = g84_pcie_max_speed,
     96 	.pcie.cur_speed = g84_pcie_cur_speed,
     97 
     98 	.pcie.set_version = gf100_pcie_set_version,
     99 	.pcie.version = gf100_pcie_version,
    100 	.pcie.version_supported = g92_pcie_version_supported,
    101 };
    102 
    103 int
    104 gf100_pci_new(struct nvkm_device *device, int index, struct nvkm_pci **ppci)
    105 {
    106 	return nvkm_pci_new_(&gf100_pci_func, device, index, ppci);
    107 }
    108