/*
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* Copyright 2012 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <core/ramht.h>
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#include <core/engine.h>
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#include <core/object.h>
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static u32
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nvkm_ramht_hash(struct nvkm_ramht *ramht, int chid, u32 handle)
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{
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u32 hash = 0;
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while (handle) {
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hash ^= (handle & ((1 << ramht->bits) - 1));
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handle >>= ramht->bits;
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}
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hash ^= chid << (ramht->bits - 4);
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return hash;
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}
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struct nvkm_gpuobj *
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nvkm_ramht_search(struct nvkm_ramht *ramht, int chid, u32 handle)
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{
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u32 co, ho;
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co = ho = nvkm_ramht_hash(ramht, chid, handle);
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do {
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if (ramht->data[co].chid == chid) {
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if (ramht->data[co].handle == handle)
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return ramht->data[co].inst;
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}
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if (++co >= ramht->size)
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co = 0;
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} while (co != ho);
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return NULL;
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}
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static int
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nvkm_ramht_update(struct nvkm_ramht *ramht, int co, struct nvkm_object *object,
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int chid, int addr, u32 handle, u32 context)
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{
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struct nvkm_ramht_data *data = &ramht->data[co];
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u64 inst = 0x00000040; /* just non-zero for <=g8x fifo ramht */
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int ret;
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nvkm_gpuobj_del(&data->inst);
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data->chid = chid;
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data->handle = handle;
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if (object) {
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ret = nvkm_object_bind(object, ramht->parent, 16, &data->inst);
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if (ret) {
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if (ret != -ENODEV) {
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data->chid = -1;
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return ret;
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}
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data->inst = NULL;
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}
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if (data->inst) {
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if (ramht->device->card_type >= NV_50)
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inst = data->inst->node->offset;
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else
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inst = data->inst->addr;
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}
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if (addr < 0) context |= inst << -addr;
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else context |= inst >> addr;
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}
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nvkm_kmap(ramht->gpuobj);
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nvkm_wo32(ramht->gpuobj, (co << 3) + 0, handle);
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nvkm_wo32(ramht->gpuobj, (co << 3) + 4, context);
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nvkm_done(ramht->gpuobj);
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return co + 1;
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}
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void
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nvkm_ramht_remove(struct nvkm_ramht *ramht, int cookie)
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{
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if (--cookie >= 0)
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nvkm_ramht_update(ramht, cookie, NULL, -1, 0, 0, 0);
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}
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int
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nvkm_ramht_insert(struct nvkm_ramht *ramht, struct nvkm_object *object,
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int chid, int addr, u32 handle, u32 context)
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{
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u32 co, ho;
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if (nvkm_ramht_search(ramht, chid, handle))
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return -EEXIST;
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co = ho = nvkm_ramht_hash(ramht, chid, handle);
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do {
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if (ramht->data[co].chid < 0) {
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return nvkm_ramht_update(ramht, co, object, chid,
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addr, handle, context);
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}
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if (++co >= ramht->size)
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co = 0;
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} while (co != ho);
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return -ENOSPC;
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}
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void
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nvkm_ramht_del(struct nvkm_ramht **pramht)
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{
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struct nvkm_ramht *ramht = *pramht;
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if (ramht) {
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nvkm_gpuobj_del(&ramht->gpuobj);
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vfree(*pramht);
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*pramht = NULL;
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}
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}
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int
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nvkm_ramht_new(struct nvkm_device *device, u32 size, u32 align,
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struct nvkm_gpuobj *parent, struct nvkm_ramht **pramht)
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{
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struct nvkm_ramht *ramht;
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int ret, i;
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if (!(ramht = *pramht = vzalloc(struct_size(ramht, data, (size >> 3)))))
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return -ENOMEM;
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ramht->device = device;
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ramht->parent = parent;
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ramht->size = size >> 3;
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ramht->bits = order_base_2(ramht->size);
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for (i = 0; i < ramht->size; i++)
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ramht->data[i].chid = -1;
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ret = nvkm_gpuobj_new(ramht->device, size, align, true,
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ramht->parent, &ramht->gpuobj);
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if (ret)
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nvkm_ramht_del(pramht);
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return ret;
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}
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