Merged bsd-1-0-0

1 files changed, 201 insertions, 0 deletions

diff --git a/bsd/tdfx/tdfx_context.c b/bsd/tdfx/tdfx_context.c
new file mode 100644
index 00000000..0aecf762
--- /dev/null
+++ b/bsd/tdfx/tdfx_context.c
@@ -0,0 +1,201 @@
+/* tdfx_context.c -- IOCTLs for tdfx contexts -*- c -*-
+ * Created: Thu Oct  7 10:50:22 1999 by faith@precisioninsight.com
+ * Revised: Sat Oct  9 23:39:56 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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
+ * PRECISION INSIGHT AND/OR ITS 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.
+ * 
+ * $PI$
+ * $XFree86$
+ *
+ */
+
+#include "drmP.h"
+#include "tdfx_drv.h"
+
+extern drm_ctx_t tdfx_res_ctx;
+
+static int tdfx_alloc_queue(drm_device_t *dev)
+{
+	static int context = 0;
+
+	return ++context;	/* Should this reuse contexts in the future? */
+}
+
+int tdfx_context_switch(drm_device_t *dev, int old, int new)
+{
+        char        buf[64];
+
+        atomic_inc(&dev->total_ctx);
+
+        if (test_and_set_bit(0, &dev->context_flag)) {
+                DRM_ERROR("Reentering -- FIXME\n");
+                return -EBUSY;
+        }
+
+#if DRM_DMA_HISTOGRAM
+        getnanotime(&dev->ctx_start);
+#endif
+        
+        DRM_DEBUG("Context switch from %d to %d\n", old, new);
+
+        if (new == dev->last_context) {
+                clear_bit(0, &dev->context_flag);
+                return 0;
+        }
+        
+        if (drm_flags & DRM_FLAG_NOCTX) {
+                tdfx_context_switch_complete(dev, new);
+        } else {
+                sprintf(buf, "C %d %d\n", old, new);
+                drm_write_string(dev, buf);
+        }
+        
+        return 0;
+}
+
+int tdfx_context_switch_complete(drm_device_t *dev, int new)
+{
+        dev->last_context = new;  /* PRE/POST: This is the _only_ writer. */
+        dev->last_switch  = ticks;
+        
+        if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
+                DRM_ERROR("Lock isn't held after context switch\n");
+        }
+
+				/* If a context switch is ever initiated
+                                   when the kernel holds the lock, release
+                                   that lock here. */
+#if DRM_DMA_HISTOGRAM
+	{
+	    struct timespec ts;
+	    getnanotime(&ts);
+	    timespecsub(&ts, &dev->lck_start);
+	    atomic_inc(&dev->histo.ctx[drm_histogram_slot(&ts)]);
+	}
+#endif
+        clear_bit(0, &dev->context_flag);
+        wakeup(&dev->context_wait);
+        
+        return 0;
+}
+
+
+int
+tdfx_resctx(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p)
+{
+	drm_ctx_res_t	res;
+	drm_ctx_t	ctx;
+	int		i, error;
+
+	DRM_DEBUG("%d\n", DRM_RESERVED_CONTEXTS);
+	res = *(drm_ctx_res_t *) data;
+	if (res.count >= DRM_RESERVED_CONTEXTS) {
+		memset(&ctx, 0, sizeof(ctx));
+		for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
+			ctx.handle = i;
+			error = copyout(&i, &res.contexts[i], sizeof(i));
+			if (error) return error;
+		}
+	}
+	res.count = DRM_RESERVED_CONTEXTS;
+	*(drm_ctx_res_t *) data = res;
+	return 0;
+}
+
+
+int
+tdfx_addctx(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p)
+{
+	drm_device_t	*dev	= kdev->si_drv1;
+	drm_ctx_t	ctx;
+
+	ctx = *(drm_ctx_t *) data;
+	if ((ctx.handle = tdfx_alloc_queue(dev)) == DRM_KERNEL_CONTEXT) {
+				/* Skip kernel's context and get a new one. */
+		ctx.handle = tdfx_alloc_queue(dev);
+	}
+	DRM_DEBUG("%d\n", ctx.handle);
+	*(drm_ctx_t *) data = ctx;
+	return 0;
+}
+
+int
+tdfx_modctx(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p)
+{
+	drm_ctx_t ctx;
+
+	ctx = *(drm_ctx_t *) data;
+	if (ctx.flags==_DRM_CONTEXT_PRESERVED)
+		tdfx_res_ctx.handle=ctx.handle;
+	return 0;
+}
+
+int
+tdfx_getctx(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p)
+{
+	drm_ctx_t ctx;
+
+	ctx = *(drm_ctx_t *) data;
+	/* This is 0, because we don't hanlde any context flags */
+	ctx.flags = 0;
+	*(drm_ctx_t *) data = ctx;
+	return 0;
+}
+
+int
+tdfx_switchctx(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p)
+{
+	drm_device_t	*dev	= kdev->si_drv1;
+	drm_ctx_t	ctx;
+
+	ctx = *(drm_ctx_t *) data;
+	DRM_DEBUG("%d\n", ctx.handle);
+	return tdfx_context_switch(dev, dev->last_context, ctx.handle);
+}
+
+int
+tdfx_newctx(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p)
+{
+	drm_device_t	*dev	= kdev->si_drv1;
+	drm_ctx_t	ctx;
+
+	ctx = *(drm_ctx_t *) data;
+	DRM_DEBUG("%d\n", ctx.handle);
+	tdfx_context_switch_complete(dev, ctx.handle);
+
+	return 0;
+}
+
+int
+tdfx_rmctx(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p)
+{
+	drm_ctx_t	ctx;
+
+	ctx = *(drm_ctx_t *) data;
+	DRM_DEBUG("%d\n", ctx.handle);
+				/* This is currently a noop because we
+				   don't reuse context values.  Perhaps we
+				   should? */
+	
+	return 0;
+}