nouveau: get nv30 context switching to work.

* Pulled in some registers from nv10reg.h.  Needed for context switching.
* Filled in nv30 graphics context (based on nv40_graph.c).
* Figure out nv30 context table, set up on context creation.  Allows the cards automatic switching to work.

1 files changed, 243 insertions, 0 deletions

diff --git a/shared-core/nv30_graph.c b/shared-core/nv30_graph.c
new file mode 100644
index 00000000..dbc39490
--- /dev/null
+++ b/shared-core/nv30_graph.c
@@ -0,0 +1,243 @@
+/*
+ * Based on nv40_graph.c
+ *  Someday this will all go away...
+ */
+#include "drmP.h"
+#include "drm.h"
+#include "nouveau_drv.h"
+#include "nouveau_drm.h"
+
+/*
+ *  TODO: In the dump start seems to be 7654b0 while end is 76ac28.
+ *  This is obviously not the correct size. 
+ */
+#define NV30_GRCTX_SIZE (22392)
+
+/*TODO: deciper what each offset in the context represents. The below
+ *      contexts are taken from dumps just after the 3D object is
+ *      created.
+ */
+static void nv30_graph_context_init(drm_device_t *dev, struct mem_block *ctx)
+{
+	drm_nouveau_private_t *dev_priv = dev->dev_private;
+	int i;
+
+        INSTANCE_WR(ctx, 0x28/4,  0x10000000);
+        INSTANCE_WR(ctx, 0x40c/4, 0x00000101);
+        INSTANCE_WR(ctx, 0x420/4, 0x00000111);
+        INSTANCE_WR(ctx, 0x424/4, 0x00000060);
+        INSTANCE_WR(ctx, 0x440/4, 0x00000080);
+        INSTANCE_WR(ctx, 0x444/4, 0xffff0000);
+        INSTANCE_WR(ctx, 0x448/4, 0x00000001);
+        INSTANCE_WR(ctx, 0x45c/4, 0x44400000);
+        INSTANCE_WR(ctx, 0x448/4, 0xffff0000);
+        INSTANCE_WR(ctx, 0x4dc/4, 0xfff00000);
+        INSTANCE_WR(ctx, 0x4e0/4, 0xfff00000);
+        INSTANCE_WR(ctx, 0x4e8/4, 0x00011100);
+
+        for (i = 0x504; i <= 0x540; i += 4)
+                INSTANCE_WR(ctx, i/4, 0x7ff00000);
+
+        INSTANCE_WR(ctx, 0x54c/4, 0x4b7fffff);
+        INSTANCE_WR(ctx, 0x588/4, 0x00000080);
+        INSTANCE_WR(ctx, 0x58c/4, 0x30201000);
+        INSTANCE_WR(ctx, 0x590/4, 0x70605040);
+        INSTANCE_WR(ctx, 0x594/4, 0xb8a89888);
+        INSTANCE_WR(ctx, 0x598/4, 0xf8e8d8c8);
+        INSTANCE_WR(ctx, 0x5ac/4, 0xb0000000);
+
+        for (i = 0x604; i <= 0x640; i += 4)
+                INSTANCE_WR(ctx, i/4, 0x00010588);
+
+        for (i = 0x644; i <= 0x680; i += 4)
+                INSTANCE_WR(ctx, i/4, 0x00030303);
+
+        for (i = 0x6c4; i <= 0x700; i += 4)
+                INSTANCE_WR(ctx, i/4, 0x0008aae4);
+
+        for (i = 0x704; i <= 0x740; i += 4)
+                INSTANCE_WR(ctx, i/4, 0x1012000);
+
+        for (i = 0x744; i <= 0x780; i += 4)
+                INSTANCE_WR(ctx, i/4, 0x0080008);
+
+        INSTANCE_WR(ctx, 0x860/4, 0x00040000);
+        INSTANCE_WR(ctx, 0x864/4, 0x00010000);
+        INSTANCE_WR(ctx, 0x868/4, 0x00040000);
+        INSTANCE_WR(ctx, 0x86c/4, 0x00040000);
+        INSTANCE_WR(ctx, 0x870/4, 0x00040000);
+        INSTANCE_WR(ctx, 0x874/4, 0x00040000);
+
+        for (i = 0x00; i <= 0x1170; i += 0x10)
+        {
+                INSTANCE_WR(ctx, (0x1f24 + i)/4, 0x000c001b);
+                INSTANCE_WR(ctx, (0x1f20 + i)/4, 0x0436086c);
+                INSTANCE_WR(ctx, (0x1f1c + i)/4, 0x10700ff9);
+        }
+
+        INSTANCE_WR(ctx, 0x30bc/4, 0x0000ffff);
+        INSTANCE_WR(ctx, 0x30c0/4, 0x0000ffff);
+        INSTANCE_WR(ctx, 0x30c4/4, 0x0000ffff);
+        INSTANCE_WR(ctx, 0x30c8/4, 0x0000ffff);
+
+        INSTANCE_WR(ctx, 0x380c/4, 0x3f800000);
+        INSTANCE_WR(ctx, 0x3450/4, 0x3f800000);
+        INSTANCE_WR(ctx, 0x3820/4, 0x3f800000);
+        INSTANCE_WR(ctx, 0x3854/4, 0x3f800000);
+        INSTANCE_WR(ctx, 0x3850/4, 0x3f000000);
+        INSTANCE_WR(ctx, 0x384c/4, 0x40000000);
+        INSTANCE_WR(ctx, 0x3868/4, 0xbf800000);
+        INSTANCE_WR(ctx, 0x3860/4, 0x3f800000);
+        INSTANCE_WR(ctx, 0x386c/4, 0x40000000);
+        INSTANCE_WR(ctx, 0x3870/4, 0xbf800000);
+
+        for (i = 0x4e0; i <= 0x4e1c; i += 4)
+                INSTANCE_WR(ctx, i/4, 0x001c527d);
+        INSTANCE_WR(ctx, 0x4e40, 0x001c527c);
+
+        INSTANCE_WR(ctx, 0x5680/4, 0x000a0000);
+        INSTANCE_WR(ctx, 0x87c/4, 0x10000000);
+        INSTANCE_WR(ctx, 0x28/4, 0x10000011);
+}
+
+
+int
+nv30_graph_context_create(drm_device_t *dev, int channel)
+{
+	drm_nouveau_private_t *dev_priv =
+		(drm_nouveau_private_t *)dev->dev_private;
+	struct nouveau_fifo *chan = &dev_priv->fifos[channel];
+	void (*ctx_init)(drm_device_t *, struct mem_block *);
+	unsigned int ctx_size;
+	int i, chipset;
+
+	chipset = (NV_READ(NV_PMC_BOOT_0) & 0x0ff00000) >> 20;
+	switch (chipset) {
+	default:
+		ctx_size = NV30_GRCTX_SIZE;
+		ctx_init = nv30_graph_context_init;
+		break;
+	}
+
+	/* Alloc and clear RAMIN to store the context */
+	chan->ramin_grctx = nouveau_instmem_alloc(dev, ctx_size, 4);
+	if (!chan->ramin_grctx)
+		return DRM_ERR(ENOMEM);
+	for (i=0; i<ctx_size; i+=4)
+		INSTANCE_WR(chan->ramin_grctx, i/4, 0x00000000);
+
+	/* Initialise default context values */
+	ctx_init(dev, chan->ramin_grctx);
+
+	return 0;
+}
+#if 0
+/* Save current context (from PGRAPH) into the channel's context
+ *XXX: fails sometimes, not sure why..
+ */
+void
+nv40_graph_context_save_current(drm_device_t *dev)
+{
+	drm_nouveau_private_t *dev_priv =
+		(drm_nouveau_private_t *)dev->dev_private;
+	uint32_t instance;
+	int i;
+
+	NV_WRITE(NV_PGRAPH_FIFO, 0);
+
+	instance = NV_READ(0x40032C) & 0xFFFFF;
+	if (!instance) {
+		NV_WRITE(NV_PGRAPH_FIFO, 1);
+		return;
+	}
+
+	NV_WRITE(0x400784, instance);
+	NV_WRITE(0x400310, NV_READ(0x400310) | 0x20);
+	NV_WRITE(0x400304, 1);
+	/* just in case, we don't want to spin in-kernel forever */
+	for (i=0; i<1000; i++) {
+		if (NV_READ(0x40030C) == 0)
+			break;
+	}
+	if (i==1000) {
+		DRM_ERROR("failed to save current grctx to ramin\n");
+		DRM_ERROR("instance = 0x%08x\n", NV_READ(0x40032C));
+		DRM_ERROR("0x40030C = 0x%08x\n", NV_READ(0x40030C));
+		NV_WRITE(NV_PGRAPH_FIFO, 1);
+		return;
+	}
+
+	NV_WRITE(NV_PGRAPH_FIFO, 1);
+}
+
+/* Restore the context for a specific channel into PGRAPH
+ * XXX: fails sometimes.. not sure why
+ */
+void
+nv40_graph_context_restore(drm_device_t *dev, int channel)
+{
+	drm_nouveau_private_t *dev_priv =
+		(drm_nouveau_private_t *)dev->dev_private;
+	struct nouveau_fifo *chan = &dev_priv->fifos[channel];
+	uint32_t instance;
+	int i;
+
+	instance = nouveau_chip_instance_get(dev, chan->ramin_grctx);
+
+	NV_WRITE(NV_PGRAPH_FIFO, 0);
+	NV_WRITE(0x400784, instance);
+	NV_WRITE(0x400310, NV_READ(0x400310) | 0x40);
+	NV_WRITE(0x400304, 1);
+	/* just in case, we don't want to spin in-kernel forever */
+	for (i=0; i<1000; i++) {
+		if (NV_READ(0x40030C) == 0)
+			break;
+	}
+	if (i==1000) {
+		DRM_ERROR("failed to restore grctx for ch%d to PGRAPH\n",
+				channel);
+		DRM_ERROR("instance = 0x%08x\n", instance);
+		DRM_ERROR("0x40030C = 0x%08x\n", NV_READ(0x40030C));
+		NV_WRITE(NV_PGRAPH_FIFO, 1);
+		return;
+	}
+
+
+	/* 0x40032C, no idea of it's exact function.  Could simply be a
+	 * record of the currently active PGRAPH context.  It's currently
+	 * unknown as to what bit 24 does.  The nv ddx has it set, so we will
+	 * set it here too.
+	 */
+	NV_WRITE(0x40032C, instance | 0x01000000);
+	/* 0x32E0 records the instance address of the active FIFO's PGRAPH
+	 * context.  If at any time this doesn't match 0x40032C, you will
+	 * recieve PGRAPH_INTR_CONTEXT_SWITCH
+	 */
+	NV_WRITE(NV40_PFIFO_GRCTX_INSTANCE, instance);
+	NV_WRITE(NV_PGRAPH_FIFO, 1);
+}
+#endif
+int
+nv30_graph_init(drm_device_t *dev)
+{
+	drm_nouveau_private_t *dev_priv =
+		(drm_nouveau_private_t *)dev->dev_private;
+	int i, chipset;
+
+	chipset = (NV_READ(NV_PMC_BOOT_0) & 0x0ff00000) >> 20;
+	DRM_DEBUG("chipset (from PMC_BOOT_0): NV%02X\n", chipset);
+
+        /* Create Context Pointer Table */
+        dev_priv->ctx_table_size = 32 * 4;
+        dev_priv->ctx_table = nouveau_instmem_alloc(dev, dev_priv->ctx_table_size, 4);
+        if (!dev_priv->ctx_table)
+                return DRM_ERR(ENOMEM);
+
+        for (i=0; i< dev_priv->ctx_table_size; i+=4)
+                INSTANCE_WR(dev_priv->ctx_table, i/4, 0x00000000);
+
+        NV_WRITE(NV_PGRAPH_CHANNEL_CTX_TABLE, nouveau_chip_instance_get(dev, dev_priv->ctx_table));
+
+	return 0;
+}
+