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