1 files changed, 294 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nv50_fb.c b/drivers/gpu/drm/nouveau/nv50_fb.c
new file mode 100644
index 00000000..bdd2afe2
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nv50_fb.c
@@ -0,0 +1,294 @@
+#include "drmP.h"
+#include "drm.h"
+#include "nouveau_drv.h"
+#include "nouveau_drm.h"
+
+struct nv50_fb_priv {
+	struct page *r100c08_page;
+	dma_addr_t r100c08;
+};
+
+static void
+nv50_fb_destroy(struct drm_device *dev)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct nouveau_fb_engine *pfb = &dev_priv->engine.fb;
+	struct nv50_fb_priv *priv = pfb->priv;
+
+	if (drm_mm_initialized(&pfb->tag_heap))
+		drm_mm_takedown(&pfb->tag_heap);
+
+	if (priv->r100c08_page) {
+		pci_unmap_page(dev->pdev, priv->r100c08, PAGE_SIZE,
+			       PCI_DMA_BIDIRECTIONAL);
+		__free_page(priv->r100c08_page);
+	}
+
+	kfree(priv);
+	pfb->priv = NULL;
+}
+
+static int
+nv50_fb_create(struct drm_device *dev)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct nouveau_fb_engine *pfb = &dev_priv->engine.fb;
+	struct nv50_fb_priv *priv;
+	u32 tagmem;
+	int ret;
+
+	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+	pfb->priv = priv;
+
+	priv->r100c08_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+	if (!priv->r100c08_page) {
+		nv50_fb_destroy(dev);
+		return -ENOMEM;
+	}
+
+	priv->r100c08 = pci_map_page(dev->pdev, priv->r100c08_page, 0,
+				     PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
+	if (pci_dma_mapping_error(dev->pdev, priv->r100c08)) {
+		nv50_fb_destroy(dev);
+		return -EFAULT;
+	}
+
+	tagmem = nv_rd32(dev, 0x100320);
+	NV_DEBUG(dev, "%d tags available\n", tagmem);
+	ret = drm_mm_init(&pfb->tag_heap, 0, tagmem);
+	if (ret) {
+		nv50_fb_destroy(dev);
+		return ret;
+	}
+
+	return 0;
+}
+
+int
+nv50_fb_init(struct drm_device *dev)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct nv50_fb_priv *priv;
+	int ret;
+
+	if (!dev_priv->engine.fb.priv) {
+		ret = nv50_fb_create(dev);
+		if (ret)
+			return ret;
+	}
+	priv = dev_priv->engine.fb.priv;
+
+	/* Not a clue what this is exactly.  Without pointing it at a
+	 * scratch page, VRAM->GART blits with M2MF (as in DDX DFS)
+	 * cause IOMMU "read from address 0" errors (rh#561267)
+	 */
+	nv_wr32(dev, 0x100c08, priv->r100c08 >> 8);
+
+	/* This is needed to get meaningful information from 100c90
+	 * on traps. No idea what these values mean exactly. */
+	switch (dev_priv->chipset) {
+	case 0x50:
+		nv_wr32(dev, 0x100c90, 0x000707ff);
+		break;
+	case 0xa3:
+	case 0xa5:
+	case 0xa8:
+		nv_wr32(dev, 0x100c90, 0x000d0fff);
+		break;
+	case 0xaf:
+		nv_wr32(dev, 0x100c90, 0x089d1fff);
+		break;
+	default:
+		nv_wr32(dev, 0x100c90, 0x001d07ff);
+		break;
+	}
+
+	return 0;
+}
+
+void
+nv50_fb_takedown(struct drm_device *dev)
+{
+	nv50_fb_destroy(dev);
+}
+
+static struct nouveau_enum vm_dispatch_subclients[] = {
+	{ 0x00000000, "GRCTX", NULL },
+	{ 0x00000001, "NOTIFY", NULL },
+	{ 0x00000002, "QUERY", NULL },
+	{ 0x00000003, "COND", NULL },
+	{ 0x00000004, "M2M_IN", NULL },
+	{ 0x00000005, "M2M_OUT", NULL },
+	{ 0x00000006, "M2M_NOTIFY", NULL },
+	{}
+};
+
+static struct nouveau_enum vm_ccache_subclients[] = {
+	{ 0x00000000, "CB", NULL },
+	{ 0x00000001, "TIC", NULL },
+	{ 0x00000002, "TSC", NULL },
+	{}
+};
+
+static struct nouveau_enum vm_prop_subclients[] = {
+	{ 0x00000000, "RT0", NULL },
+	{ 0x00000001, "RT1", NULL },
+	{ 0x00000002, "RT2", NULL },
+	{ 0x00000003, "RT3", NULL },
+	{ 0x00000004, "RT4", NULL },
+	{ 0x00000005, "RT5", NULL },
+	{ 0x00000006, "RT6", NULL },
+	{ 0x00000007, "RT7", NULL },
+	{ 0x00000008, "ZETA", NULL },
+	{ 0x00000009, "LOCAL", NULL },
+	{ 0x0000000a, "GLOBAL", NULL },
+	{ 0x0000000b, "STACK", NULL },
+	{ 0x0000000c, "DST2D", NULL },
+	{}
+};
+
+static struct nouveau_enum vm_pfifo_subclients[] = {
+	{ 0x00000000, "PUSHBUF", NULL },
+	{ 0x00000001, "SEMAPHORE", NULL },
+	{}
+};
+
+static struct nouveau_enum vm_bar_subclients[] = {
+	{ 0x00000000, "FB", NULL },
+	{ 0x00000001, "IN", NULL },
+	{}
+};
+
+static struct nouveau_enum vm_client[] = {
+	{ 0x00000000, "STRMOUT", NULL },
+	{ 0x00000003, "DISPATCH", vm_dispatch_subclients },
+	{ 0x00000004, "PFIFO_WRITE", NULL },
+	{ 0x00000005, "CCACHE", vm_ccache_subclients },
+	{ 0x00000006, "PPPP", NULL },
+	{ 0x00000007, "CLIPID", NULL },
+	{ 0x00000008, "PFIFO_READ", NULL },
+	{ 0x00000009, "VFETCH", NULL },
+	{ 0x0000000a, "TEXTURE", NULL },
+	{ 0x0000000b, "PROP", vm_prop_subclients },
+	{ 0x0000000c, "PVP", NULL },
+	{ 0x0000000d, "PBSP", NULL },
+	{ 0x0000000e, "PCRYPT", NULL },
+	{ 0x0000000f, "PCOUNTER", NULL },
+	{ 0x00000011, "PDAEMON", NULL },
+	{}
+};
+
+static struct nouveau_enum vm_engine[] = {
+	{ 0x00000000, "PGRAPH", NULL },
+	{ 0x00000001, "PVP", NULL },
+	{ 0x00000004, "PEEPHOLE", NULL },
+	{ 0x00000005, "PFIFO", vm_pfifo_subclients },
+	{ 0x00000006, "BAR", vm_bar_subclients },
+	{ 0x00000008, "PPPP", NULL },
+	{ 0x00000009, "PBSP", NULL },
+	{ 0x0000000a, "PCRYPT", NULL },
+	{ 0x0000000b, "PCOUNTER", NULL },
+	{ 0x0000000c, "SEMAPHORE_BG", NULL },
+	{ 0x0000000d, "PCOPY", NULL },
+	{ 0x0000000e, "PDAEMON", NULL },
+	{}
+};
+
+static struct nouveau_enum vm_fault[] = {
+	{ 0x00000000, "PT_NOT_PRESENT", NULL },
+	{ 0x00000001, "PT_TOO_SHORT", NULL },
+	{ 0x00000002, "PAGE_NOT_PRESENT", NULL },
+	{ 0x00000003, "PAGE_SYSTEM_ONLY", NULL },
+	{ 0x00000004, "PAGE_READ_ONLY", NULL },
+	{ 0x00000006, "NULL_DMAOBJ", NULL },
+	{ 0x00000007, "WRONG_MEMTYPE", NULL },
+	{ 0x0000000b, "VRAM_LIMIT", NULL },
+	{ 0x0000000f, "DMAOBJ_LIMIT", NULL },
+	{}
+};
+
+void
+nv50_fb_vm_trap(struct drm_device *dev, int display)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	const struct nouveau_enum *en, *cl;
+	unsigned long flags;
+	u32 trap[6], idx, chinst;
+	u8 st0, st1, st2, st3;
+	int i, ch;
+
+	idx = nv_rd32(dev, 0x100c90);
+	if (!(idx & 0x80000000))
+		return;
+	idx &= 0x00ffffff;
+
+	for (i = 0; i < 6; i++) {
+		nv_wr32(dev, 0x100c90, idx | i << 24);
+		trap[i] = nv_rd32(dev, 0x100c94);
+	}
+	nv_wr32(dev, 0x100c90, idx | 0x80000000);
+
+	if (!display)
+		return;
+
+	/* lookup channel id */
+	chinst = (trap[2] << 16) | trap[1];
+	spin_lock_irqsave(&dev_priv->channels.lock, flags);
+	for (ch = 0; ch < dev_priv->engine.fifo.channels; ch++) {
+		struct nouveau_channel *chan = dev_priv->channels.ptr[ch];
+
+		if (!chan || !chan->ramin)
+			continue;
+
+		if (chinst == chan->ramin->vinst >> 12)
+			break;
+	}
+	spin_unlock_irqrestore(&dev_priv->channels.lock, flags);
+
+	/* decode status bits into something more useful */
+	if (dev_priv->chipset  < 0xa3 ||
+	    dev_priv->chipset == 0xaa || dev_priv->chipset == 0xac) {
+		st0 = (trap[0] & 0x0000000f) >> 0;
+		st1 = (trap[0] & 0x000000f0) >> 4;
+		st2 = (trap[0] & 0x00000f00) >> 8;
+		st3 = (trap[0] & 0x0000f000) >> 12;
+	} else {
+		st0 = (trap[0] & 0x000000ff) >> 0;
+		st1 = (trap[0] & 0x0000ff00) >> 8;
+		st2 = (trap[0] & 0x00ff0000) >> 16;
+		st3 = (trap[0] & 0xff000000) >> 24;
+	}
+
+	NV_INFO(dev, "VM: trapped %s at 0x%02x%04x%04x on ch %d [0x%08x] ",
+		(trap[5] & 0x00000100) ? "read" : "write",
+		trap[5] & 0xff, trap[4] & 0xffff, trap[3] & 0xffff, ch, chinst);
+
+	en = nouveau_enum_find(vm_engine, st0);
+	if (en)
+		printk("%s/", en->name);
+	else
+		printk("%02x/", st0);
+
+	cl = nouveau_enum_find(vm_client, st2);
+	if (cl)
+		printk("%s/", cl->name);
+	else
+		printk("%02x/", st2);
+
+	if      (cl && cl->data) cl = nouveau_enum_find(cl->data, st3);
+	else if (en && en->data) cl = nouveau_enum_find(en->data, st3);
+	else                     cl = NULL;
+	if (cl)
+		printk("%s", cl->name);
+	else
+		printk("%02x", st3);
+
+	printk(" reason: ");
+	en = nouveau_enum_find(vm_fault, st1);
+	if (en)
+		printk("%s\n", en->name);
+	else
+		printk("0x%08x\n", st1);
+}