drm/nouveau: kick vram functions out into an "engine"

NVC0 will be able to share some of nv50's paths this way.  This also makes
it the card-specific vram code responsible for deciding if a given set
of tile_flags is valid, rather than duplicating the allowed types in
nv50_vram.c and nouveau_gem.c
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nouveau_drv.h

@@ -501,6 +501,15 @@ struct nouveau_crypt_engine {
 	void (*tlb_flush)(struct drm_device *dev);
 };
 
+struct nouveau_vram_engine {
+	int  (*init)(struct drm_device *);
+	int  (*get)(struct drm_device *, u64, u32 align, u32 size_nc,
+		    u32 type, struct nouveau_vram **);
+	void (*put)(struct drm_device *, struct nouveau_vram **);
+
+	bool (*flags_valid)(struct drm_device *, u32 tile_flags);
+};
+
 struct nouveau_engine {
 	struct nouveau_instmem_engine instmem;
 	struct nouveau_mc_engine      mc;
@@ -512,6 +521,7 @@ struct nouveau_engine {
 	struct nouveau_gpio_engine    gpio;
 	struct nouveau_pm_engine      pm;
 	struct nouveau_crypt_engine   crypt;
+	struct nouveau_vram_engine    vram;
 };
 
 struct nouveau_pll_vals {
@@ -821,6 +831,8 @@ extern void nouveau_mem_gart_fini(struct drm_device *);
 extern int  nouveau_mem_init_agp(struct drm_device *);
 extern int  nouveau_mem_reset_agp(struct drm_device *);
 extern void nouveau_mem_close(struct drm_device *);
+extern int  nouveau_mem_detect(struct drm_device *);
+extern bool nouveau_mem_flags_valid(struct drm_device *, u32 tile_flags);
 extern struct nouveau_tile_reg *nv10_mem_set_tiling(
 	struct drm_device *dev, uint32_t addr, uint32_t size,
 	uint32_t pitch, uint32_t flags);

drivers/gpu/drm/nouveau/nouveau_gem.c

@@ -103,32 +103,6 @@ nouveau_gem_info(struct drm_gem_object *gem, struct drm_nouveau_gem_info *rep)
 	return 0;
 }
 
-static bool
-nouveau_gem_tile_flags_valid(struct drm_device *dev, uint32_t tile_flags)
-{
-	struct drm_nouveau_private *dev_priv = dev->dev_private;
-
-	if (dev_priv->card_type >= NV_50) {
-		switch (tile_flags & NOUVEAU_GEM_TILE_LAYOUT_MASK) {
-		case 0x0000:
-		case 0x1800:
-		case 0x2800:
-		case 0x4800:
-		case 0x7000:
-		case 0x7400:
-		case 0x7a00:
-		case 0xe000:
-			return true;
-		}
-	} else {
-		if (!(tile_flags & NOUVEAU_GEM_TILE_LAYOUT_MASK))
-			return true;
-	}
-
-	NV_ERROR(dev, "bad page flags: 0x%08x\n", tile_flags);
-	return false;
-}
-
 int
 nouveau_gem_ioctl_new(struct drm_device *dev, void *data,
 		      struct drm_file *file_priv)
@@ -150,8 +124,10 @@ nouveau_gem_ioctl_new(struct drm_device *dev, void *data,
 	if (!flags || req->info.domain & NOUVEAU_GEM_DOMAIN_CPU)
 		flags |= TTM_PL_FLAG_SYSTEM;
 
-	if (!nouveau_gem_tile_flags_valid(dev, req->info.tile_flags))
+	if (!dev_priv->engine.vram.flags_valid(dev, req->info.tile_flags)) {
+		NV_ERROR(dev, "bad page flags: 0x%08x\n", req->info.tile_flags);
 		return -EINVAL;
+	}
 
 	if (req->channel_hint) {
 		chan = nouveau_channel_get(dev, file_priv, req->channel_hint);

drivers/gpu/drm/nouveau/nouveau_mem.c

@@ -241,7 +241,7 @@ nouveau_mem_detect_nforce(struct drm_device *dev)
 	return 0;
 }
 
-static int
+int
 nouveau_mem_detect(struct drm_device *dev)
 {
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
@@ -255,26 +255,25 @@ nouveau_mem_detect(struct drm_device *dev)
 	if (dev_priv->card_type < NV_50) {
 		dev_priv->vram_size  = nv_rd32(dev, NV04_PFB_FIFO_DATA);
 		dev_priv->vram_size &= NV10_PFB_FIFO_DATA_RAM_AMOUNT_MB_MASK;
-	} else
-	if (dev_priv->card_type < NV_C0) {
-		if (nv50_vram_init(dev))
-			return -ENOMEM;
 	} else {
 		dev_priv->vram_size  = nv_rd32(dev, 0x10f20c) << 20;
 		dev_priv->vram_size *= nv_rd32(dev, 0x121c74);
 	}
 
-	NV_INFO(dev, "Detected %dMiB VRAM\n", (int)(dev_priv->vram_size >> 20));
-	if (dev_priv->vram_sys_base) {
-		NV_INFO(dev, "Stolen system memory at: 0x%010llx\n",
-			dev_priv->vram_sys_base);
-	}
-
 	if (dev_priv->vram_size)
 		return 0;
 	return -ENOMEM;
 }
 
+bool
+nouveau_mem_flags_valid(struct drm_device *dev, u32 tile_flags)
+{
+	if (!(tile_flags & NOUVEAU_GEM_TILE_LAYOUT_MASK))
+		return true;
+
+	return false;
+}
+
 #if __OS_HAS_AGP
 static unsigned long
 get_agp_mode(struct drm_device *dev, unsigned long mode)
@@ -432,11 +431,16 @@ nouveau_mem_vram_init(struct drm_device *dev)
 	else
 		dev_priv->ramin_rsvd_vram = (512 * 1024);
 
-	/* initialise gpu-specific vram backend */
-	ret = nouveau_mem_detect(dev);
+	ret = dev_priv->engine.vram.init(dev);
 	if (ret)
 		return ret;
 
+	NV_INFO(dev, "Detected %dMiB VRAM\n", (int)(dev_priv->vram_size >> 20));
+	if (dev_priv->vram_sys_base) {
+		NV_INFO(dev, "Stolen system memory at: 0x%010llx\n",
+			dev_priv->vram_sys_base);
+	}
+
 	dev_priv->fb_available_size = dev_priv->vram_size;
 	dev_priv->fb_mappable_pages = dev_priv->fb_available_size;
 	if (dev_priv->fb_mappable_pages > pci_resource_len(dev->pdev, 1))
@@ -698,9 +702,10 @@ nouveau_vram_manager_del(struct ttm_mem_type_manager *man,
 			 struct ttm_mem_reg *mem)
 {
 	struct drm_nouveau_private *dev_priv = nouveau_bdev(man->bdev);
+	struct nouveau_vram_engine *vram = &dev_priv->engine.vram;
 	struct drm_device *dev = dev_priv->dev;
 
-	nv50_vram_del(dev, (struct nouveau_vram **)&mem->mm_node);
+	vram->put(dev, (struct nouveau_vram **)&mem->mm_node);
 }
 
 static int
@@ -710,30 +715,30 @@ nouveau_vram_manager_new(struct ttm_mem_type_manager *man,
 			 struct ttm_mem_reg *mem)
 {
 	struct drm_nouveau_private *dev_priv = nouveau_bdev(man->bdev);
+	struct nouveau_vram_engine *vram = &dev_priv->engine.vram;
 	struct drm_device *dev = dev_priv->dev;
 	struct nouveau_bo *nvbo = nouveau_bo(bo);
-	struct nouveau_vram *vram;
+	struct nouveau_vram *node;
 	u32 size_nc = 0;
 	int ret;
 
 	if (nvbo->tile_flags & NOUVEAU_GEM_TILE_NONCONTIG)
 		size_nc = 1 << nvbo->vma.node->type;
 
-	ret = nv50_vram_new(dev, mem->num_pages << PAGE_SHIFT,
+	ret = vram->get(dev, mem->num_pages << PAGE_SHIFT,
 			mem->page_alignment << PAGE_SHIFT, size_nc,
-			    (nvbo->tile_flags >> 8) & 0x7f, &vram);
+			(nvbo->tile_flags >> 8) & 0xff, &node);
 	if (ret)
 		return ret;
 
-	mem->mm_node = vram;
-	mem->start   = vram->offset >> PAGE_SHIFT;
+	mem->mm_node = node;
+	mem->start   = node->offset >> PAGE_SHIFT;
 	return 0;
 }
 
 void
 nouveau_vram_manager_debug(struct ttm_mem_type_manager *man, const char *prefix)
 {
-	struct ttm_bo_global *glob = man->bdev->glob;
 	struct nouveau_mm *mm = man->priv;
 	struct nouveau_mm_node *r;
 	u64 total = 0, ttotal[3] = {}, tused[3] = {}, tfree[3] = {};

drivers/gpu/drm/nouveau/nouveau_mm.h

@@ -57,5 +57,6 @@ int  nv50_vram_init(struct drm_device *);
 int  nv50_vram_new(struct drm_device *, u64 size, u32 align, u32 size_nc,
 		    u32 memtype, struct nouveau_vram **);
 void nv50_vram_del(struct drm_device *, struct nouveau_vram **);
+bool nv50_vram_flags_valid(struct drm_device *, u32 tile_flags);
 
 #endif

drivers/gpu/drm/nouveau/nouveau_state.c

@@ -100,6 +100,8 @@ static int nouveau_init_engine_ptrs(struct drm_device *dev)
 		engine->pm.clock_set		= nv04_pm_clock_set;
 		engine->crypt.init		= nouveau_stub_init;
 		engine->crypt.takedown		= nouveau_stub_takedown;
+		engine->vram.init		= nouveau_mem_detect;
+		engine->vram.flags_valid	= nouveau_mem_flags_valid;
 		break;
 	case 0x10:
 		engine->instmem.init		= nv04_instmem_init;
@@ -157,6 +159,8 @@ static int nouveau_init_engine_ptrs(struct drm_device *dev)
 		engine->pm.clock_set		= nv04_pm_clock_set;
 		engine->crypt.init		= nouveau_stub_init;
 		engine->crypt.takedown		= nouveau_stub_takedown;
+		engine->vram.init		= nouveau_mem_detect;
+		engine->vram.flags_valid	= nouveau_mem_flags_valid;
 		break;
 	case 0x20:
 		engine->instmem.init		= nv04_instmem_init;
@@ -214,6 +218,8 @@ static int nouveau_init_engine_ptrs(struct drm_device *dev)
 		engine->pm.clock_set		= nv04_pm_clock_set;
 		engine->crypt.init		= nouveau_stub_init;
 		engine->crypt.takedown		= nouveau_stub_takedown;
+		engine->vram.init		= nouveau_mem_detect;
+		engine->vram.flags_valid	= nouveau_mem_flags_valid;
 		break;
 	case 0x30:
 		engine->instmem.init		= nv04_instmem_init;
@@ -273,6 +279,8 @@ static int nouveau_init_engine_ptrs(struct drm_device *dev)
 		engine->pm.voltage_set		= nouveau_voltage_gpio_set;
 		engine->crypt.init		= nouveau_stub_init;
 		engine->crypt.takedown		= nouveau_stub_takedown;
+		engine->vram.init		= nouveau_mem_detect;
+		engine->vram.flags_valid	= nouveau_mem_flags_valid;
 		break;
 	case 0x40:
 	case 0x60:
@@ -334,6 +342,8 @@ static int nouveau_init_engine_ptrs(struct drm_device *dev)
 		engine->pm.temp_get		= nv40_temp_get;
 		engine->crypt.init		= nouveau_stub_init;
 		engine->crypt.takedown		= nouveau_stub_takedown;
+		engine->vram.init		= nouveau_mem_detect;
+		engine->vram.flags_valid	= nouveau_mem_flags_valid;
 		break;
 	case 0x50:
 	case 0x80: /* gotta love NVIDIA's consistency.. */
@@ -444,6 +454,10 @@ static int nouveau_init_engine_ptrs(struct drm_device *dev)
 			engine->crypt.takedown	= nouveau_stub_takedown;
 			break;
 		}
+		engine->vram.init		= nv50_vram_init;
+		engine->vram.get		= nv50_vram_new;
+		engine->vram.put		= nv50_vram_del;
+		engine->vram.flags_valid	= nv50_vram_flags_valid;
 		break;
 	case 0xC0:
 		engine->instmem.init		= nvc0_instmem_init;
@@ -495,6 +509,8 @@ static int nouveau_init_engine_ptrs(struct drm_device *dev)
 		engine->gpio.irq_enable		= nv50_gpio_irq_enable;
 		engine->crypt.init		= nouveau_stub_init;
 		engine->crypt.takedown		= nouveau_stub_takedown;
+		engine->vram.init		= nouveau_mem_detect;
+		engine->vram.flags_valid	= nouveau_mem_flags_valid;
 		break;
 	default:
 		NV_ERROR(dev, "NV%02x unsupported\n", dev_priv->chipset);

drivers/gpu/drm/nouveau/nv50_instmem.c

@@ -312,6 +312,7 @@ nv50_instmem_get(struct nouveau_gpuobj *gpuobj, u32 size, u32 align)
 {
 	struct drm_device *dev = gpuobj->dev;
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct nouveau_vram_engine *vram = &dev_priv->engine.vram;
 	struct nv50_gpuobj_node *node = NULL;
 	int ret;
 
@@ -323,7 +324,7 @@ nv50_instmem_get(struct nouveau_gpuobj *gpuobj, u32 size, u32 align)
 	size  = (size + 4095) & ~4095;
 	align = max(align, (u32)4096);
 
-	ret = nv50_vram_new(dev, size, align, 0, 0, &node->vram);
+	ret = vram->get(dev, size, align, 0, 0, &node->vram);
 	if (ret) {
 		kfree(node);
 		return ret;
@@ -336,7 +337,7 @@ nv50_instmem_get(struct nouveau_gpuobj *gpuobj, u32 size, u32 align)
 				     NV_MEM_ACCESS_RW | NV_MEM_ACCESS_SYS,
 				     &node->chan_vma);
 		if (ret) {
-			nv50_vram_del(dev, &node->vram);
+			vram->put(dev, &node->vram);
 			kfree(node);
 			return ret;
 		}
@@ -354,6 +355,8 @@ void
 nv50_instmem_put(struct nouveau_gpuobj *gpuobj)
 {
 	struct drm_device *dev = gpuobj->dev;
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct nouveau_vram_engine *vram = &dev_priv->engine.vram;
 	struct nv50_gpuobj_node *node;
 
 	node = gpuobj->node;
@@ -363,7 +366,7 @@ nv50_instmem_put(struct nouveau_gpuobj *gpuobj)
 		nouveau_vm_unmap(&node->chan_vma);
 		nouveau_vm_put(&node->chan_vma);
 	}
-	nv50_vram_del(dev, &node->vram);
+	vram->put(dev, &node->vram);
 	kfree(node);
 }
 

drivers/gpu/drm/nouveau/nv50_vram.c

@@ -37,6 +37,16 @@ static int types[0x80] = {
 	1, 0, 2, 0, 1, 0, 2, 0, 1, 1, 2, 2, 1, 1, 0, 0
 };
 
+bool
+nv50_vram_flags_valid(struct drm_device *dev, u32 tile_flags)
+{
+	int type = (tile_flags & NOUVEAU_GEM_TILE_LAYOUT_MASK) >> 8;
+
+	if (likely(type < sizeof(types) && types[type]))
+		return true;
+	return false;
+}
+
 void
 nv50_vram_del(struct drm_device *dev, struct nouveau_vram **pvram)
 {