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/*
* Copyright © 2009 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 (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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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:
* Ben Skeggs <bskeggs@redhat.com>
*/
#include "nv_include.h"
struct wfb_pixmap {
PixmapPtr ppix;
unsigned long base;
unsigned long end;
unsigned pitch;
unsigned tile_height;
unsigned horiz_tiles;
uint64_t multiply_factor;
};
static struct wfb_pixmap wfb_pixmap[6];
static inline FbBits
nouveau_wfb_rd_linear(const void *src, int size)
{
FbBits bits = 0;
memcpy(&bits, src, size);
return bits;
}
static inline void
nouveau_wfb_wr_linear(void *dst, FbBits value, int size)
{
memcpy(dst, &value, size);
}
#define TP 6
#define TH wfb->tile_height
#define TPM ((1 << TP) - 1)
#define THM ((1 << TH) - 1)
static FbBits
nouveau_wfb_rd_tiled(const void *ptr, int size) {
unsigned long offset = (unsigned long)ptr;
struct wfb_pixmap *wfb = NULL;
FbBits bits = 0;
int x, y, i;
for (i = 0; i < 6; i++) {
if (offset >= wfb_pixmap[i].base &&
offset < wfb_pixmap[i].end) {
wfb = &wfb_pixmap[i];
break;
}
}
if (!wfb || !wfb->pitch)
return nouveau_wfb_rd_linear(ptr, size);
offset -= wfb->base;
y = (offset * wfb->multiply_factor) >> 36;
x = offset - y * wfb->pitch;
offset = (x >> TP) + ((y >> TH) * wfb->horiz_tiles);
offset *= (1 << (TH + TP));
offset += ((y & THM) * (1 << TP)) + (x & TPM);
memcpy(&bits, (void *)wfb->base + offset, size);
return bits;
}
static void
nouveau_wfb_wr_tiled(void *ptr, FbBits value, int size) {
unsigned long offset = (unsigned long)ptr;
struct wfb_pixmap *wfb = NULL;
int x, y, i;
for (i = 0; i < 6; i++) {
if (offset >= wfb_pixmap[i].base &&
offset < wfb_pixmap[i].end) {
wfb = &wfb_pixmap[i];
break;
}
}
if (!wfb || !wfb->pitch) {
nouveau_wfb_wr_linear(ptr, value, size);
return;
}
offset -= wfb->base;
y = (offset * wfb->multiply_factor) >> 36;
x = offset - y * wfb->pitch;
offset = (x >> TP) + ((y >> TH) * wfb->horiz_tiles);
offset *= (1 << (TH + TP));
offset += ((y & THM) * (1 << TP)) + (x & TPM);
memcpy((void *)wfb->base + offset, &value, size);
}
void
nouveau_wfb_setup_wrap(ReadMemoryProcPtr *pRead, WriteMemoryProcPtr *pWrite,
DrawablePtr pDraw)
{
struct nouveau_bo *bo = NULL;
struct wfb_pixmap *wfb;
PixmapPtr ppix = NULL;
int i, j, have_tiled = 0;
if (!pRead || !pWrite)
return;
ppix = NVGetDrawablePixmap(pDraw);
if (ppix)
bo = nouveau_pixmap_bo(ppix);
if (!ppix || !bo) {
for (i = 0; i < 6; i++)
if (wfb_pixmap[i].ppix && wfb_pixmap[i].pitch)
have_tiled = 1;
if (have_tiled) {
*pRead = nouveau_wfb_rd_tiled;
*pWrite = nouveau_wfb_wr_tiled;
} else {
*pRead = nouveau_wfb_rd_linear;
*pWrite = nouveau_wfb_wr_linear;
}
return;
}
j = -1;
for (i = 0; i < 6; i++) {
if (!wfb_pixmap[i].ppix && j < 0)
j = i;
if (wfb_pixmap[i].ppix && wfb_pixmap[i].pitch)
have_tiled = 1;
}
if (j == -1) {
ErrorF("We ran out of wfb indices, this is not good.\n");
goto out;
}
wfb = &wfb_pixmap[j];
wfb->ppix = ppix;
wfb->base = (unsigned long)ppix->devPrivate.ptr;
wfb->end = wfb->base + bo->size;
if (!nv50_style_tiled_pixmap(ppix)) {
wfb->pitch = 0;
} else {
wfb->pitch = ppix->devKind;
/* 8192x8192x4 is 28 bits max, 64 - 28 == 36. */
wfb->multiply_factor = (((1ULL << 36) - 1) / wfb->pitch) + 1;
if (bo->device->chipset < 0xc0)
wfb->tile_height = bo->tile_mode + 2;
else
wfb->tile_height = (bo->tile_mode >> 4) + 3;
wfb->horiz_tiles = wfb->pitch / 64;
have_tiled = 1;
}
out:
if (have_tiled) {
*pRead = nouveau_wfb_rd_tiled;
*pWrite = nouveau_wfb_wr_tiled;
} else {
*pRead = nouveau_wfb_rd_linear;
*pWrite = nouveau_wfb_wr_linear;
}
}
void
nouveau_wfb_finish_wrap(DrawablePtr pDraw)
{
PixmapPtr ppix;
int i;
ppix = NVGetDrawablePixmap(pDraw);
if (!ppix)
return;
for (i = 0; i < 6; i++) {
if (wfb_pixmap[i].ppix == ppix) {
wfb_pixmap[i].ppix = NULL;
wfb_pixmap[i].base = ~0UL;
break;
}
}
}
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