| 1 | /* $NetBSD: nouveau_subdev_bar_base.c,v 1.5 2016/04/12 15:12:12 riastradh Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright 2012 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 |
| 25 | */ |
| 26 | |
| 27 | #include <sys/cdefs.h> |
| 28 | __KERNEL_RCSID(0, "$NetBSD: nouveau_subdev_bar_base.c,v 1.5 2016/04/12 15:12:12 riastradh Exp $" ); |
| 29 | |
| 30 | #include <core/object.h> |
| 31 | |
| 32 | #include <subdev/fb.h> |
| 33 | #include <subdev/vm.h> |
| 34 | |
| 35 | #include "priv.h" |
| 36 | |
| 37 | struct nouveau_barobj { |
| 38 | struct nouveau_object base; |
| 39 | struct nouveau_vma vma; |
| 40 | #ifdef __NetBSD__ |
| 41 | bus_space_tag_t iomemt; |
| 42 | bus_space_handle_t iomemh; |
| 43 | #else |
| 44 | void __iomem *iomem; |
| 45 | #endif |
| 46 | }; |
| 47 | |
| 48 | static int |
| 49 | nouveau_barobj_ctor(struct nouveau_object *parent, |
| 50 | struct nouveau_object *engine, |
| 51 | struct nouveau_oclass *oclass, void *mem, u32 size, |
| 52 | struct nouveau_object **pobject) |
| 53 | { |
| 54 | struct nouveau_bar *bar = (void *)engine; |
| 55 | struct nouveau_barobj *barobj; |
| 56 | int ret; |
| 57 | |
| 58 | ret = nouveau_object_create(parent, engine, oclass, 0, &barobj); |
| 59 | *pobject = nv_object(barobj); |
| 60 | if (ret) |
| 61 | return ret; |
| 62 | |
| 63 | ret = bar->kmap(bar, mem, NV_MEM_ACCESS_RW, &barobj->vma); |
| 64 | if (ret) |
| 65 | return ret; |
| 66 | |
| 67 | #ifdef __NetBSD__ |
| 68 | { |
| 69 | /* Yes, truncation is really intended here. */ |
| 70 | uint32_t offset = barobj->vma.offset & 0xffffffffUL; |
| 71 | |
| 72 | KASSERTMSG(offset < bar->iomemsz, |
| 73 | "bar object vma exceeds range: %" PRIx32" > %" PRIxMAX, |
| 74 | offset, (uintmax_t)bar->iomemsz); |
| 75 | |
| 76 | barobj->iomemt = bar->iomemt; |
| 77 | /* XXX errno NetBSD->Linux */ |
| 78 | ret = -bus_space_subregion(bar->iomemt, bar->iomemh, offset, |
| 79 | bar->iomemsz - offset, &barobj->iomemh); |
| 80 | if (ret) |
| 81 | return ret; |
| 82 | } |
| 83 | #else |
| 84 | barobj->iomem = bar->iomem + (u32)barobj->vma.offset; |
| 85 | #endif |
| 86 | return 0; |
| 87 | } |
| 88 | |
| 89 | static void |
| 90 | nouveau_barobj_dtor(struct nouveau_object *object) |
| 91 | { |
| 92 | struct nouveau_bar *bar = (void *)object->engine; |
| 93 | struct nouveau_barobj *barobj = (void *)object; |
| 94 | if (barobj->vma.node) |
| 95 | bar->unmap(bar, &barobj->vma); |
| 96 | nouveau_object_destroy(&barobj->base); |
| 97 | } |
| 98 | |
| 99 | static u32 |
| 100 | nouveau_barobj_rd32(struct nouveau_object *object, u64 addr) |
| 101 | { |
| 102 | struct nouveau_barobj *barobj = (void *)object; |
| 103 | #ifdef __NetBSD__ |
| 104 | return bus_space_read_4(barobj->iomemt, barobj->iomemh, addr); |
| 105 | #else |
| 106 | return ioread32_native(barobj->iomem + addr); |
| 107 | #endif |
| 108 | } |
| 109 | |
| 110 | static void |
| 111 | nouveau_barobj_wr32(struct nouveau_object *object, u64 addr, u32 data) |
| 112 | { |
| 113 | struct nouveau_barobj *barobj = (void *)object; |
| 114 | #ifdef __NetBSD__ |
| 115 | bus_space_write_4(barobj->iomemt, barobj->iomemh, addr, data); |
| 116 | #else |
| 117 | iowrite32_native(data, barobj->iomem + addr); |
| 118 | #endif |
| 119 | } |
| 120 | |
| 121 | static struct nouveau_oclass |
| 122 | nouveau_barobj_oclass = { |
| 123 | .ofuncs = &(struct nouveau_ofuncs) { |
| 124 | .ctor = nouveau_barobj_ctor, |
| 125 | .dtor = nouveau_barobj_dtor, |
| 126 | .init = nouveau_object_init, |
| 127 | .fini = nouveau_object_fini, |
| 128 | .rd32 = nouveau_barobj_rd32, |
| 129 | .wr32 = nouveau_barobj_wr32, |
| 130 | }, |
| 131 | }; |
| 132 | |
| 133 | int |
| 134 | nouveau_bar_alloc(struct nouveau_bar *bar, struct nouveau_object *parent, |
| 135 | struct nouveau_mem *mem, struct nouveau_object **pobject) |
| 136 | { |
| 137 | struct nouveau_object *engine = nv_object(bar); |
| 138 | return nouveau_object_ctor(parent, engine, &nouveau_barobj_oclass, |
| 139 | mem, 0, pobject); |
| 140 | } |
| 141 | |
| 142 | int |
| 143 | nouveau_bar_create_(struct nouveau_object *parent, |
| 144 | struct nouveau_object *engine, |
| 145 | struct nouveau_oclass *oclass, int length, void **pobject) |
| 146 | { |
| 147 | struct nouveau_device *device = nv_device(parent); |
| 148 | struct nouveau_bar *bar; |
| 149 | int ret; |
| 150 | |
| 151 | ret = nouveau_subdev_create_(parent, engine, oclass, 0, "BARCTL" , |
| 152 | "bar" , length, pobject); |
| 153 | bar = *pobject; |
| 154 | if (ret) |
| 155 | return ret; |
| 156 | |
| 157 | #ifdef __NetBSD__ |
| 158 | if (nv_device_resource_len(device, 3) != 0) { |
| 159 | bar->iomemt = nv_device_resource_tag(device, 3); |
| 160 | bar->iomemsz = nv_device_resource_len(device, 3); |
| 161 | if (bus_space_map(bar->iomemt, nv_device_resource_start(device, 3), |
| 162 | bar->iomemsz, 0, &bar->iomemh)) |
| 163 | bar->iomemsz = 0; /* XXX Fail? */ |
| 164 | } |
| 165 | #else |
| 166 | if (nv_device_resource_len(device, 3) != 0) |
| 167 | bar->iomem = ioremap(nv_device_resource_start(device, 3), |
| 168 | nv_device_resource_len(device, 3)); |
| 169 | #endif |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | void |
| 174 | nouveau_bar_destroy(struct nouveau_bar *bar) |
| 175 | { |
| 176 | #ifdef __NetBSD__ |
| 177 | if (bar->iomemsz) |
| 178 | bus_space_unmap(bar->iomemt, bar->iomemh, bar->iomemsz); |
| 179 | #else |
| 180 | if (bar->iomem) |
| 181 | iounmap(bar->iomem); |
| 182 | #endif |
| 183 | nouveau_subdev_destroy(&bar->base); |
| 184 | } |
| 185 | |
| 186 | void |
| 187 | _nouveau_bar_dtor(struct nouveau_object *object) |
| 188 | { |
| 189 | struct nouveau_bar *bar = (void *)object; |
| 190 | nouveau_bar_destroy(bar); |
| 191 | } |
| 192 | |