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/*
* DRI for the SMedia Glamo3362 X.org Driver
*
* Copyright 2009 Thomas White <taw@bitwiz.org.uk>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <xf86.h>
#include <xf86drm.h>
#include <glamo_drm.h>
#include <glamo_bo.h>
#include "glamo.h"
/* How many commands can be stored before forced dispatch */
#define GLAMO_CMDQ_MAX_COUNT 1024
/* Submit the prepared command sequence to the kernel */
void GlamoDRMDispatch(GlamoPtr pGlamo)
{
drm_glamo_cmd_buffer_t cmdbuf;
int r;
cmdbuf.buf = (char *)pGlamo->cmdq_drm;
cmdbuf.bufsz = pGlamo->cmdq_drm_used * 2; /* -> bytes */
cmdbuf.nobjs = pGlamo->cmdq_obj_used;
cmdbuf.objs = pGlamo->cmdq_objs;
cmdbuf.obj_pos = pGlamo->cmdq_obj_pos;
r = drmCommandWrite(pGlamo->drm_fd, DRM_GLAMO_CMDBUF,
&cmdbuf, sizeof(cmdbuf));
if ( r != 0 ) {
xf86DrvMsg(pGlamo->pScreen->myNum, X_ERROR,
"DRM_GLAMO_CMDBUF failed\n");
}
/* Reset counts to zero for the next sequence */
pGlamo->cmdq_obj_used = 0;
pGlamo->cmdq_drm_used = 0;
}
void GlamoDRMAddCommand(GlamoPtr pGlamo, uint16_t reg, uint16_t val)
{
if ( pGlamo->cmdq_drm_used >= GLAMO_CMDQ_MAX_COUNT - 2 ) {
xf86DrvMsg(pGlamo->pScreen->myNum, X_INFO,
"Forced command cache flush.\n");
GlamoDRMDispatch(pGlamo);
}
/* Record command */
pGlamo->cmdq_drm[pGlamo->cmdq_drm_used++] = reg;
pGlamo->cmdq_drm[pGlamo->cmdq_drm_used++] = val;
}
void GlamoDRMAddCommandBO(GlamoPtr pGlamo, uint16_t reg, struct glamo_bo *bo)
{
if ( pGlamo->cmdq_drm_used >= GLAMO_CMDQ_MAX_COUNT - 4 ||
pGlamo->cmdq_obj_used >= GLAMO_CMDQ_MAX_COUNT) {
xf86DrvMsg(pGlamo->pScreen->myNum, X_INFO,
"Forced command cache flush.\n");
GlamoDRMDispatch(pGlamo);
}
/* Record object position */
pGlamo->cmdq_objs[pGlamo->cmdq_obj_used] = bo->handle;
/* -> bytes */
pGlamo->cmdq_obj_pos[pGlamo->cmdq_obj_used] = pGlamo->cmdq_drm_used * 2;
pGlamo->cmdq_obj_used++;
/* Record command */
pGlamo->cmdq_drm[pGlamo->cmdq_drm_used++] = reg;
pGlamo->cmdq_drm[pGlamo->cmdq_drm_used++] = 0x0000;
pGlamo->cmdq_drm[pGlamo->cmdq_drm_used++] = reg+2;
pGlamo->cmdq_drm[pGlamo->cmdq_drm_used++] = 0x0000;
pGlamo->last_buffer_object = bo;
}
void GlamoDRMInit(GlamoPtr pGlamo)
{
pGlamo->cmdq_objs = malloc(GLAMO_CMDQ_MAX_COUNT*sizeof(uint32_t));
pGlamo->cmdq_obj_pos = malloc(GLAMO_CMDQ_MAX_COUNT*sizeof(unsigned int));
pGlamo->cmdq_obj_used = 0;
pGlamo->cmdq_drm_used = 0;
/* we're using 2bytes per entry (uint16_t) that's why we need to allocate
* GLAMO_CMDQ_MAX_COUNT * 2 bytes
*/
pGlamo->cmdq_drm_size = 2 * GLAMO_CMDQ_MAX_COUNT;
pGlamo->cmdq_drm = malloc(pGlamo->cmdq_drm_size);
}
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