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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/char/drm/ffb_context.c
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/char/drm/ffb_context.c')
-rw-r--r--drivers/char/drm/ffb_context.c551
1 files changed, 551 insertions, 0 deletions
diff --git a/drivers/char/drm/ffb_context.c b/drivers/char/drm/ffb_context.c
new file mode 100644
index 00000000000..f5181207801
--- /dev/null
+++ b/drivers/char/drm/ffb_context.c
@@ -0,0 +1,551 @@
+/* $Id: ffb_context.c,v 1.5 2001/08/09 17:47:51 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 "ffb.h"
+#include "drmP.h"
+
+#include "ffb_drv.h"
+
+static int DRM(alloc_queue)(drm_device_t *dev, int is_2d_only)
+{
+ ffb_dev_priv_t *fpriv = (ffb_dev_priv_t *) dev->dev_private;
+ 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_driver_context_switch(drm_device_t *dev, int old, int new)
+{
+ ffb_dev_priv_t *fpriv = (ffb_dev_priv_t *) dev->dev_private;
+
+#ifdef 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_driver_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 __user *)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 __user *)arg, &res, sizeof(res)))
+ return -EFAULT;
+ return 0;
+}
+
+
+int ffb_driver_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 __user *)arg, sizeof(ctx)))
+ return -EFAULT;
+ idx = DRM(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 __user *)arg, &ctx, sizeof(ctx)))
+ return -EFAULT;
+ return 0;
+}
+
+int ffb_driver_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->dev_private;
+ struct ffb_hw_context *hwctx;
+ drm_ctx_t ctx;
+ int idx;
+
+ if (copy_from_user(&ctx, (drm_ctx_t __user *)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_driver_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->dev_private;
+ struct ffb_hw_context *hwctx;
+ drm_ctx_t ctx;
+ int idx;
+
+ if (copy_from_user(&ctx, (drm_ctx_t __user *)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 __user *)arg, &ctx, sizeof(ctx)))
+ return -EFAULT;
+
+ return 0;
+}
+
+int ffb_driver_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 __user *)arg, sizeof(ctx)))
+ return -EFAULT;
+ DRM_DEBUG("%d\n", ctx.handle);
+ return ffb_driver_context_switch(dev, dev->last_context, ctx.handle);
+}
+
+int ffb_driver_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 __user *)arg, sizeof(ctx)))
+ return -EFAULT;
+ DRM_DEBUG("%d\n", ctx.handle);
+
+ return 0;
+}
+
+int ffb_driver_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->dev_private;
+ int idx;
+
+ if (copy_from_user(&ctx, (drm_ctx_t __user *)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;
+}
+
+void ffb_set_context_ioctls(void)
+{
+ DRM(ioctls)[DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)].func = ffb_driver_addctx;
+ DRM(ioctls)[DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)].func = ffb_driver_rmctx;
+ DRM(ioctls)[DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)].func = ffb_driver_modctx;
+ DRM(ioctls)[DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)].func = ffb_driver_getctx;
+ DRM(ioctls)[DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)].func = ffb_driver_switchctx;
+ DRM(ioctls)[DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)].func = ffb_driver_newctx;
+ DRM(ioctls)[DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)].func = ffb_driver_resctx;
+
+}