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/*
* Copyright 2010 Jerome Glisse <glisse@freedesktop.org>
*
* 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
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, 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 (including the next
* paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHOR(S) AND/OR THEIR SUPPLIERS 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.
*
* Authors:
* Jerome Glisse
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "radeon_priv.h"
/*
* state core functions
*/
struct radeon_state *radeon_state(struct radeon *radeon, u32 id)
{
struct radeon_state *state;
state = calloc(1, sizeof(*state));
if (state == NULL)
return NULL;
state->radeon = radeon;
state->id = id;
state->refcount = 1;
state->cpm4 = radeon->type[id].state_cpm4;
memcpy(state->states, radeon->type[id].state_pm4, radeon->type[id].state_cpm4 * 4);
return state;
}
struct radeon_state *radeon_state_duplicate(struct radeon_state *state)
{
struct radeon_state *nstate = radeon_state(state->radeon, state->id);
unsigned i;
if (state == NULL)
return NULL;
*nstate = *state;
for (i = 0; i < state->nbo; i++) {
nstate->bo[i] = radeon_bo_incref(state->radeon, state->bo[i]);
}
return nstate;
}
struct radeon_state *radeon_state_incref(struct radeon_state *state)
{
state->refcount++;
return state;
}
struct radeon_state *radeon_state_decref(struct radeon_state *state)
{
unsigned i;
if (state == NULL)
return NULL;
if (--state->refcount > 0) {
return NULL;
}
for (i = 0; i < state->nbo; i++) {
state->bo[i] = radeon_bo_decref(state->radeon, state->bo[i]);
}
memset(state, 0, sizeof(*state));
free(state);
return NULL;
}
int radeon_state_replace_always(struct radeon_state *ostate,
struct radeon_state *nstate)
{
return 1;
}
int radeon_state_pm4_generic(struct radeon_state *state)
{
return -EINVAL;
}
static u32 crc32(void *d, size_t len)
{
u16 *data = (uint16_t*)d;
u32 sum1 = 0xffff, sum2 = 0xffff;
len = len >> 1;
while (len) {
unsigned tlen = len > 360 ? 360 : len;
len -= tlen;
do {
sum1 += *data++;
sum2 += sum1;
} while (--tlen);
sum1 = (sum1 & 0xffff) + (sum1 >> 16);
sum2 = (sum2 & 0xffff) + (sum2 >> 16);
}
/* Second reduction step to reduce sums to 16 bits */
sum1 = (sum1 & 0xffff) + (sum1 >> 16);
sum2 = (sum2 & 0xffff) + (sum2 >> 16);
return sum2 << 16 | sum1;
}
int radeon_state_pm4(struct radeon_state *state)
{
if (state == NULL)
return 0;
state->pm4_crc = crc32(state->states, state->cpm4 * 4);
return 0;
}
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