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1/*2 * Copyright 2012 Red Hat Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * 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 OR20 * OTHER DEALINGS IN THE SOFTWARE.21 */22#include <core/ramht.h>23#include <core/engine.h>24#include <core/object.h>25 26static u3227nvkm_ramht_hash(struct nvkm_ramht *ramht, int chid, u32 handle)28{29 u32 hash = 0;30 31 while (handle) {32 hash ^= (handle & ((1 << ramht->bits) - 1));33 handle >>= ramht->bits;34 }35 36 hash ^= chid << (ramht->bits - 4);37 return hash;38}39 40struct nvkm_gpuobj *41nvkm_ramht_search(struct nvkm_ramht *ramht, int chid, u32 handle)42{43 u32 co, ho;44 45 co = ho = nvkm_ramht_hash(ramht, chid, handle);46 do {47 if (ramht->data[co].chid == chid) {48 if (ramht->data[co].handle == handle)49 return ramht->data[co].inst;50 }51 52 if (++co >= ramht->size)53 co = 0;54 } while (co != ho);55 56 return NULL;57}58 59static int60nvkm_ramht_update(struct nvkm_ramht *ramht, int co, struct nvkm_object *object,61 int chid, int addr, u32 handle, u32 context)62{63 struct nvkm_ramht_data *data = &ramht->data[co];64 u64 inst = 0x00000040; /* just non-zero for <=g8x fifo ramht */65 int ret;66 67 nvkm_gpuobj_del(&data->inst);68 data->chid = chid;69 data->handle = handle;70 71 if (object) {72 ret = nvkm_object_bind(object, ramht->parent, 16, &data->inst);73 if (ret) {74 if (ret != -ENODEV) {75 data->chid = -1;76 return ret;77 }78 data->inst = NULL;79 }80 81 if (data->inst) {82 if (ramht->device->card_type >= NV_50)83 inst = data->inst->node->offset;84 else85 inst = data->inst->addr;86 }87 88 if (addr < 0) context |= inst << -addr;89 else context |= inst >> addr;90 }91 92 nvkm_kmap(ramht->gpuobj);93 nvkm_wo32(ramht->gpuobj, (co << 3) + 0, handle);94 nvkm_wo32(ramht->gpuobj, (co << 3) + 4, context);95 nvkm_done(ramht->gpuobj);96 return co + 1;97}98 99void100nvkm_ramht_remove(struct nvkm_ramht *ramht, int cookie)101{102 if (--cookie >= 0)103 nvkm_ramht_update(ramht, cookie, NULL, -1, 0, 0, 0);104}105 106int107nvkm_ramht_insert(struct nvkm_ramht *ramht, struct nvkm_object *object,108 int chid, int addr, u32 handle, u32 context)109{110 u32 co, ho;111 112 if (nvkm_ramht_search(ramht, chid, handle))113 return -EEXIST;114 115 co = ho = nvkm_ramht_hash(ramht, chid, handle);116 do {117 if (ramht->data[co].chid < 0) {118 return nvkm_ramht_update(ramht, co, object, chid,119 addr, handle, context);120 }121 122 if (++co >= ramht->size)123 co = 0;124 } while (co != ho);125 126 return -ENOSPC;127}128 129void130nvkm_ramht_del(struct nvkm_ramht **pramht)131{132 struct nvkm_ramht *ramht = *pramht;133 if (ramht) {134 nvkm_gpuobj_del(&ramht->gpuobj);135 vfree(*pramht);136 *pramht = NULL;137 }138}139 140int141nvkm_ramht_new(struct nvkm_device *device, u32 size, u32 align,142 struct nvkm_gpuobj *parent, struct nvkm_ramht **pramht)143{144 struct nvkm_ramht *ramht;145 int ret, i;146 147 if (!(ramht = *pramht = vzalloc(struct_size(ramht, data, (size >> 3)))))148 return -ENOMEM;149 150 ramht->device = device;151 ramht->parent = parent;152 ramht->size = size >> 3;153 ramht->bits = order_base_2(ramht->size);154 for (i = 0; i < ramht->size; i++)155 ramht->data[i].chid = -1;156 157 ret = nvkm_gpuobj_new(ramht->device, size, align, true,158 ramht->parent, &ramht->gpuobj);159 if (ret)160 nvkm_ramht_del(pramht);161 return ret;162}163