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/* $Id: ffb_context.c,v 1.4 2000/08/29 07:01:55 davem Exp $
* ffb_context.c: Creator/Creator3D DRI/DRM context switching.
*
* Copyright (C) 2000 David S. Miller (davem@redhat.com)
*
* Almost entirely stolen from tdfx_context.c, see there
* for authors.
*/
#include <linux/sched.h>
#include <asm/upa.h>
#include "drmP.h"
#include "ffb_drv.h"
static int ffb_alloc_queue(drm_device_t *dev, int is_2d_only)
{
ffb_dev_priv_t *fpriv = (ffb_dev_priv_t *) (dev + 1);
int i;
for (i = 0; i < FFB_MAX_CTXS; i++) {
if (fpriv->hw_state[i] == NULL)
break;
}
if (i == FFB_MAX_CTXS)
return -1;
fpriv->hw_state[i] = kmalloc(sizeof(struct ffb_hw_context), GFP_KERNEL);
if (fpriv->hw_state[i] == NULL)
return -1;
fpriv->hw_state[i]->is_2d_only = is_2d_only;
/* Plus one because 0 is the special DRM_KERNEL_CONTEXT. */
return i + 1;
}
static void ffb_save_context(ffb_dev_priv_t *fpriv, int idx)
{
ffb_fbcPtr ffb = fpriv->regs;
struct ffb_hw_context *ctx;
int i;
ctx = fpriv->hw_state[idx - 1];
if (idx == 0 || ctx == NULL)
return;
if (ctx->is_2d_only) {
/* 2D applications only care about certain pieces
* of state.
*/
ctx->drawop = upa_readl(&ffb->drawop);
ctx->ppc = upa_readl(&ffb->ppc);
ctx->wid = upa_readl(&ffb->wid);
ctx->fg = upa_readl(&ffb->fg);
ctx->bg = upa_readl(&ffb->bg);
ctx->xclip = upa_readl(&ffb->xclip);
ctx->fbc = upa_readl(&ffb->fbc);
ctx->rop = upa_readl(&ffb->rop);
ctx->cmp = upa_readl(&ffb->cmp);
ctx->matchab = upa_readl(&ffb->matchab);
ctx->magnab = upa_readl(&ffb->magnab);
ctx->pmask = upa_readl(&ffb->pmask);
ctx->xpmask = upa_readl(&ffb->xpmask);
ctx->lpat = upa_readl(&ffb->lpat);
ctx->fontxy = upa_readl(&ffb->fontxy);
ctx->fontw = upa_readl(&ffb->fontw);
ctx->fontinc = upa_readl(&ffb->fontinc);
/* stencil/stencilctl only exists on FFB2+ and later
* due to the introduction of 3DRAM-III.
*/
if (fpriv->ffb_type == ffb2_vertical_plus ||
fpriv->ffb_type == ffb2_horizontal_plus) {
ctx->stencil = upa_readl(&ffb->stencil);
ctx->stencilctl = upa_readl(&ffb->stencilctl);
}
for (i = 0; i < 32; i++)
ctx->area_pattern[i] = upa_readl(&ffb->pattern[i]);
ctx->ucsr = upa_readl(&ffb->ucsr);
return;
}
/* Fetch drawop. */
ctx->drawop = upa_readl(&ffb->drawop);
/* If we were saving the vertex registers, this is where
* we would do it. We would save 32 32-bit words starting
* at ffb->suvtx.
*/
/* Capture rendering attributes. */
ctx->ppc = upa_readl(&ffb->ppc); /* Pixel Processor Control */
ctx->wid = upa_readl(&ffb->wid); /* Current WID */
ctx->fg = upa_readl(&ffb->fg); /* Constant FG color */
ctx->bg = upa_readl(&ffb->bg); /* Constant BG color */
ctx->consty = upa_readl(&ffb->consty); /* Constant Y */
ctx->constz = upa_readl(&ffb->constz); /* Constant Z */
ctx->xclip = upa_readl(&ffb->xclip); /* X plane clip */
ctx->dcss = upa_readl(&ffb->dcss); /* Depth Cue Scale Slope */
ctx->vclipmin = upa_readl(&ffb->vclipmin); /* Primary XY clip, minimum */
ctx->vclipmax = upa_readl(&ffb->vclipmax); /* Primary XY clip, maximum */
ctx->vclipzmin = upa_readl(&ffb->vclipzmin); /* Primary Z clip, minimum */
ctx->vclipzmax = upa_readl(&ffb->vclipzmax); /* Primary Z clip, maximum */
ctx->dcsf = upa_readl(&ffb->dcsf); /* Depth Cue Scale Front Bound */
ctx->dcsb = upa_readl(&ffb->dcsb); /* Depth Cue Scale Back Bound */
ctx->dczf = upa_readl(&ffb->dczf); /* Depth Cue Scale Z Front */
ctx->dczb = upa_readl(&ffb->dczb); /* Depth Cue Scale Z Back */
ctx->blendc = upa_readl(&ffb->blendc); /* Alpha Blend Control */
ctx->blendc1 = upa_readl(&ffb->blendc1); /* Alpha Blend Color 1 */
ctx->blendc2 = upa_readl(&ffb->blendc2); /* Alpha Blend Color 2 */
ctx->fbc = upa_readl(&ffb->fbc); /* Frame Buffer Control */
ctx->rop = upa_readl(&ffb->rop); /* Raster Operation */
ctx->cmp = upa_readl(&ffb->cmp); /* Compare Controls */
ctx->matchab = upa_readl(&ffb->matchab); /* Buffer A/B Match Ops */
ctx->matchc = upa_readl(&ffb->matchc); /* Buffer C Match Ops */
ctx->magnab = upa_readl(&ffb->magnab); /* Buffer A/B Magnitude Ops */
ctx->magnc = upa_readl(&ffb->magnc); /* Buffer C Magnitude Ops */
ctx->pmask = upa_readl(&ffb->pmask); /* RGB Plane Mask */
ctx->xpmask = upa_readl(&ffb->xpmask); /* X Plane Mask */
ctx->ypmask = upa_readl(&ffb->ypmask); /* Y Plane Mask */
ctx->zpmask = upa_readl(&ffb->zpmask); /* Z Plane Mask */
/* Auxiliary Clips. */
ctx->auxclip0min = upa_readl(&ffb->auxclip[0].min);
ctx->auxclip0max = upa_readl(&ffb->auxclip[0].max);
ctx->auxclip1min = upa_readl(&ffb->auxclip[1].min);
ctx->auxclip1max = upa_readl(&ffb->auxclip[1].max);
ctx->auxclip2min = upa_readl(&ffb->auxclip[2].min);
ctx->auxclip2max = upa_readl(&ffb->auxclip[2].max);
ctx->auxclip3min = upa_readl(&ffb->auxclip[3].min);
ctx->auxclip3max = upa_readl(&ffb->auxclip[3].max);
ctx->lpat = upa_readl(&ffb->lpat); /* Line Pattern */
ctx->fontxy = upa_readl(&ffb->fontxy); /* XY Font Coordinate */
ctx->fontw = upa_readl(&ffb->fontw); /* Font Width */
ctx->fontinc = upa_readl(&ffb->fontinc); /* Font X/Y Increment */
/* These registers/features only exist on FFB2 and later chips. */
if (fpriv->ffb_type >= ffb2_prototype) {
ctx->dcss1 = upa_readl(&ffb->dcss1); /* Depth Cue Scale Slope 1 */
ctx->dcss2 = upa_readl(&ffb->dcss2); /* Depth Cue Scale Slope 2 */
ctx->dcss2 = upa_readl(&ffb->dcss3); /* Depth Cue Scale Slope 3 */
ctx->dcs2 = upa_readl(&ffb->dcs2); /* Depth Cue Scale 2 */
ctx->dcs3 = upa_readl(&ffb->dcs3); /* Depth Cue Scale 3 */
ctx->dcs4 = upa_readl(&ffb->dcs4); /* Depth Cue Scale 4 */
ctx->dcd2 = upa_readl(&ffb->dcd2); /* Depth Cue Depth 2 */
ctx->dcd3 = upa_readl(&ffb->dcd3); /* Depth Cue Depth 3 */
ctx->dcd4 = upa_readl(&ffb->dcd4); /* Depth Cue Depth 4 */
/* And stencil/stencilctl only exists on FFB2+ and later
* due to the introduction of 3DRAM-III.
*/
if (fpriv->ffb_type == ffb2_vertical_plus ||
fpriv->ffb_type == ffb2_horizontal_plus) {
ctx->stencil = upa_readl(&ffb->stencil);
ctx->stencilctl = upa_readl(&ffb->stencilctl);
}
}
/* Save the 32x32 area pattern. */
for (i = 0; i < 32; i++)
ctx->area_pattern[i] = upa_readl(&ffb->pattern[i]);
/* Finally, stash away the User Constol/Status Register. */
ctx->ucsr = upa_readl(&ffb->ucsr);
}
static void ffb_restore_context(ffb_dev_priv_t *fpriv, int old, int idx)
{
ffb_fbcPtr ffb = fpriv->regs;
struct ffb_hw_context *ctx;
int i;
ctx = fpriv->hw_state[idx - 1];
if (idx == 0 || ctx == NULL)
return;
if (ctx->is_2d_only) {
/* 2D applications only care about certain pieces
* of state.
*/
upa_writel(ctx->drawop, &ffb->drawop);
/* If we were restoring the vertex registers, this is where
* we would do it. We would restore 32 32-bit words starting
* at ffb->suvtx.
*/
upa_writel(ctx->ppc, &ffb->ppc);
upa_writel(ctx->wid, &ffb->wid);
upa_writel(ctx->fg, &ffb->fg);
upa_writel(ctx->bg, &ffb->bg);
upa_writel(ctx->xclip, &ffb->xclip);
upa_writel(ctx->fbc, &ffb->fbc);
upa_writel(ctx->rop, &ffb->rop);
upa_writel(ctx->cmp, &ffb->cmp);
upa_writel(ctx->matchab, &ffb->matchab);
upa_writel(ctx->magnab, &ffb->magnab);
upa_writel(ctx->pmask, &ffb->pmask);
upa_writel(ctx->xpmask, &ffb->xpmask);
upa_writel(ctx->lpat, &ffb->lpat);
upa_writel(ctx->fontxy, &ffb->fontxy);
upa_writel(ctx->fontw, &ffb->fontw);
upa_writel(ctx->fontinc, &ffb->fontinc);
/* stencil/stencilctl only exists on FFB2+ and later
* due to the introduction of 3DRAM-III.
*/
if (fpriv->ffb_type == ffb2_vertical_plus ||
fpriv->ffb_type == ffb2_horizontal_plus) {
upa_writel(ctx->stencil, &ffb->stencil);
upa_writel(ctx->stencilctl, &ffb->stencilctl);
upa_writel(0x80000000, &ffb->fbc);
upa_writel((ctx->stencilctl | 0x80000),
&ffb->rawstencilctl);
upa_writel(ctx->fbc, &ffb->fbc);
}
for (i = 0; i < 32; i++)
upa_writel(ctx->area_pattern[i], &ffb->pattern[i]);
upa_writel((ctx->ucsr & 0xf0000), &ffb->ucsr);
return;
}
/* Restore drawop. */
upa_writel(ctx->drawop, &ffb->drawop);
/* If we were restoring the vertex registers, this is where
* we would do it. We would restore 32 32-bit words starting
* at ffb->suvtx.
*/
/* Restore rendering attributes. */
upa_writel(ctx->ppc, &ffb->ppc); /* Pixel Processor Control */
upa_writel(ctx->wid, &ffb->wid); /* Current WID */
upa_writel(ctx->fg, &ffb->fg); /* Constant FG color */
upa_writel(ctx->bg, &ffb->bg); /* Constant BG color */
upa_writel(ctx->consty, &ffb->consty); /* Constant Y */
upa_writel(ctx->constz, &ffb->constz); /* Constant Z */
upa_writel(ctx->xclip, &ffb->xclip); /* X plane clip */
upa_writel(ctx->dcss, &ffb->dcss); /* Depth Cue Scale Slope */
upa_writel(ctx->vclipmin, &ffb->vclipmin); /* Primary XY clip, minimum */
upa_writel(ctx->vclipmax, &ffb->vclipmax); /* Primary XY clip, maximum */
upa_writel(ctx->vclipzmin, &ffb->vclipzmin); /* Primary Z clip, minimum */
upa_writel(ctx->vclipzmax, &ffb->vclipzmax); /* Primary Z clip, maximum */
upa_writel(ctx->dcsf, &ffb->dcsf); /* Depth Cue Scale Front Bound */
upa_writel(ctx->dcsb, &ffb->dcsb); /* Depth Cue Scale Back Bound */
upa_writel(ctx->dczf, &ffb->dczf); /* Depth Cue Scale Z Front */
upa_writel(ctx->dczb, &ffb->dczb); /* Depth Cue Scale Z Back */
upa_writel(ctx->blendc, &ffb->blendc); /* Alpha Blend Control */
upa_writel(ctx->blendc1, &ffb->blendc1); /* Alpha Blend Color 1 */
upa_writel(ctx->blendc2, &ffb->blendc2); /* Alpha Blend Color 2 */
upa_writel(ctx->fbc, &ffb->fbc); /* Frame Buffer Control */
upa_writel(ctx->rop, &ffb->rop); /* Raster Operation */
upa_writel(ctx->cmp, &ffb->cmp); /* Compare Controls */
upa_writel(ctx->matchab, &ffb->matchab); /* Buffer A/B Match Ops */
upa_writel(ctx->matchc, &ffb->matchc); /* Buffer C Match Ops */
upa_writel(ctx->magnab, &ffb->magnab); /* Buffer A/B Magnitude Ops */
upa_writel(ctx->magnc, &ffb->magnc); /* Buffer C Magnitude Ops */
upa_writel(ctx->pmask, &ffb->pmask); /* RGB Plane Mask */
upa_writel(ctx->xpmask, &ffb->xpmask); /* X Plane Mask */
upa_writel(ctx->ypmask, &ffb->ypmask); /* Y Plane Mask */
upa_writel(ctx->zpmask, &ffb->zpmask); /* Z Plane Mask */
/* Auxiliary Clips. */
upa_writel(ctx->auxclip0min, &ffb->auxclip[0].min);
upa_writel(ctx->auxclip0max, &ffb->auxclip[0].max);
upa_writel(ctx->auxclip1min, &ffb->auxclip[1].min);
upa_writel(ctx->auxclip1max, &ffb->auxclip[1].max);
upa_writel(ctx->auxclip2min, &ffb->auxclip[2].min);
upa_writel(ctx->auxclip2max, &ffb->auxclip[2].max);
upa_writel(ctx->auxclip3min, &ffb->auxclip[3].min);
upa_writel(ctx->auxclip3max, &ffb->auxclip[3].max);
upa_writel(ctx->lpat, &ffb->lpat); /* Line Pattern */
upa_writel(ctx->fontxy, &ffb->fontxy); /* XY Font Coordinate */
upa_writel(ctx->fontw, &ffb->fontw); /* Font Width */
upa_writel(ctx->fontinc, &ffb->fontinc); /* Font X/Y Increment */
/* These registers/features only exist on FFB2 and later chips. */
if (fpriv->ffb_type >= ffb2_prototype) {
upa_writel(ctx->dcss1, &ffb->dcss1); /* Depth Cue Scale Slope 1 */
upa_writel(ctx->dcss2, &ffb->dcss2); /* Depth Cue Scale Slope 2 */
upa_writel(ctx->dcss3, &ffb->dcss2); /* Depth Cue Scale Slope 3 */
upa_writel(ctx->dcs2, &ffb->dcs2); /* Depth Cue Scale 2 */
upa_writel(ctx->dcs3, &ffb->dcs3); /* Depth Cue Scale 3 */
upa_writel(ctx->dcs4, &ffb->dcs4); /* Depth Cue Scale 4 */
upa_writel(ctx->dcd2, &ffb->dcd2); /* Depth Cue Depth 2 */
upa_writel(ctx->dcd3, &ffb->dcd3); /* Depth Cue Depth 3 */
upa_writel(ctx->dcd4, &ffb->dcd4); /* Depth Cue Depth 4 */
/* And stencil/stencilctl only exists on FFB2+ and later
* due to the introduction of 3DRAM-III.
*/
if (fpriv->ffb_type == ffb2_vertical_plus ||
fpriv->ffb_type == ffb2_horizontal_plus) {
/* Unfortunately, there is a hardware bug on
* the FFB2+ chips which prevents a normal write
* to the stencil control register from working
* as it should.
*
* The state controlled by the FFB stencilctl register
* really gets transferred to the per-buffer instances
* of the stencilctl register in the 3DRAM chips.
*
* The bug is that FFB does not update buffer C correctly,
* so we have to do it by hand for them.
*/
/* This will update buffers A and B. */
upa_writel(ctx->stencil, &ffb->stencil);
upa_writel(ctx->stencilctl, &ffb->stencilctl);
/* Force FFB to use buffer C 3dram regs. */
upa_writel(0x80000000, &ffb->fbc);
upa_writel((ctx->stencilctl | 0x80000),
&ffb->rawstencilctl);
/* Now restore the correct FBC controls. */
upa_writel(ctx->fbc, &ffb->fbc);
}
}
/* Restore the 32x32 area pattern. */
for (i = 0; i < 32; i++)
upa_writel(ctx->area_pattern[i], &ffb->pattern[i]);
/* Finally, stash away the User Constol/Status Register.
* The only state we really preserve here is the picking
* control.
*/
upa_writel((ctx->ucsr & 0xf0000), &ffb->ucsr);
}
#define FFB_UCSR_FB_BUSY 0x01000000
#define FFB_UCSR_RP_BUSY 0x02000000
#define FFB_UCSR_ALL_BUSY (FFB_UCSR_RP_BUSY|FFB_UCSR_FB_BUSY)
static void FFBWait(ffb_fbcPtr ffb)
{
int limit = 100000;
do {
u32 regval = upa_readl(&ffb->ucsr);
if ((regval & FFB_UCSR_ALL_BUSY) == 0)
break;
} while (--limit);
}
int ffb_context_switch(drm_device_t *dev, int old, int new)
{
ffb_dev_priv_t *fpriv = (ffb_dev_priv_t *) (dev + 1);
atomic_inc(&dev->total_ctx);
#if DRM_DMA_HISTOGRAM
dev->ctx_start = get_cycles();
#endif
DRM_DEBUG("Context switch from %d to %d\n", old, new);
if (new == dev->last_context ||
dev->last_context == 0) {
dev->last_context = new;
return 0;
}
FFBWait(fpriv->regs);
ffb_save_context(fpriv, old);
ffb_restore_context(fpriv, old, new);
FFBWait(fpriv->regs);
dev->last_context = new;
return 0;
}
int ffb_resctx(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_ctx_res_t res;
drm_ctx_t ctx;
int i;
DRM_DEBUG("%d\n", DRM_RESERVED_CONTEXTS);
if (copy_from_user(&res, (drm_ctx_res_t *)arg, sizeof(res)))
return -EFAULT;
if (res.count >= DRM_RESERVED_CONTEXTS) {
memset(&ctx, 0, sizeof(ctx));
for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
ctx.handle = i;
if (copy_to_user(&res.contexts[i],
&i,
sizeof(i)))
return -EFAULT;
}
}
res.count = DRM_RESERVED_CONTEXTS;
if (copy_to_user((drm_ctx_res_t *)arg, &res, sizeof(res)))
return -EFAULT;
return 0;
}
int ffb_addctx(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
drm_ctx_t ctx;
int idx;
if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
return -EFAULT;
idx = ffb_alloc_queue(dev, (ctx.flags & _DRM_CONTEXT_2DONLY));
if (idx < 0)
return -ENFILE;
DRM_DEBUG("%d\n", ctx.handle);
ctx.handle = idx;
if (copy_to_user((drm_ctx_t *)arg, &ctx, sizeof(ctx)))
return -EFAULT;
return 0;
}
int ffb_modctx(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
ffb_dev_priv_t *fpriv = (ffb_dev_priv_t *) (dev + 1);
struct ffb_hw_context *hwctx;
drm_ctx_t ctx;
int idx;
if (copy_from_user(&ctx, (drm_ctx_t*)arg, sizeof(ctx)))
return -EFAULT;
idx = ctx.handle;
if (idx <= 0 || idx >= FFB_MAX_CTXS)
return -EINVAL;
hwctx = fpriv->hw_state[idx - 1];
if (hwctx == NULL)
return -EINVAL;
if ((ctx.flags & _DRM_CONTEXT_2DONLY) == 0)
hwctx->is_2d_only = 0;
else
hwctx->is_2d_only = 1;
return 0;
}
int ffb_getctx(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
ffb_dev_priv_t *fpriv = (ffb_dev_priv_t *) (dev + 1);
struct ffb_hw_context *hwctx;
drm_ctx_t ctx;
int idx;
if (copy_from_user(&ctx, (drm_ctx_t*)arg, sizeof(ctx)))
return -EFAULT;
idx = ctx.handle;
if (idx <= 0 || idx >= FFB_MAX_CTXS)
return -EINVAL;
hwctx = fpriv->hw_state[idx - 1];
if (hwctx == NULL)
return -EINVAL;
if (hwctx->is_2d_only != 0)
ctx.flags = _DRM_CONTEXT_2DONLY;
else
ctx.flags = 0;
if (copy_to_user((drm_ctx_t*)arg, &ctx, sizeof(ctx)))
return -EFAULT;
return 0;
}
int ffb_switchctx(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
drm_ctx_t ctx;
if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
return -EFAULT;
DRM_DEBUG("%d\n", ctx.handle);
return ffb_context_switch(dev, dev->last_context, ctx.handle);
}
int ffb_newctx(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_ctx_t ctx;
if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
return -EFAULT;
DRM_DEBUG("%d\n", ctx.handle);
return 0;
}
int ffb_rmctx(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_ctx_t ctx;
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
ffb_dev_priv_t *fpriv = (ffb_dev_priv_t *) (dev + 1);
int idx;
if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
return -EFAULT;
DRM_DEBUG("%d\n", ctx.handle);
idx = ctx.handle - 1;
if (idx < 0 || idx >= FFB_MAX_CTXS)
return -EINVAL;
if (fpriv->hw_state[idx] != NULL) {
kfree(fpriv->hw_state[idx]);
fpriv->hw_state[idx] = NULL;
}
return 0;
}
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