staging: gma500: delete the RAR handling

RAR registers are used on MID platforms for various protected video
playback activities using video playback engines we don't support.

So Rasputin can keep his Rars

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/gma500/psb_buffer.c

@@ -76,14 +76,6 @@ static int psb_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 		man->available_caching = TTM_PL_FLAG_UNCACHED;
 		man->default_caching = TTM_PL_FLAG_UNCACHED;
 		break;
-	case TTM_PL_RAR:	/* Unmappable RAR memory */
-		man->func = &ttm_bo_manager_func;
-		man->flags = TTM_MEMTYPE_FLAG_MAPPABLE |
-			TTM_MEMTYPE_FLAG_FIXED;
-		man->available_caching = TTM_PL_FLAG_UNCACHED;
-		man->default_caching = TTM_PL_FLAG_UNCACHED;
-		man->gpu_offset = pg->mmu_gatt_start + (pg->rar_start);
-		break;
 	case TTM_PL_TT:	/* Mappable GATT memory */
 		man->func = &ttm_bo_manager_func;
 #ifdef PSB_WORKING_HOST_MMU_ACCESS
@@ -95,8 +87,7 @@ static int psb_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 		man->available_caching = TTM_PL_FLAG_CACHED |
 		    TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
 		man->default_caching = TTM_PL_FLAG_WC;
-		man->gpu_offset = pg->mmu_gatt_start +
-				(pg->rar_start + dev_priv->rar_region_size);
+		man->gpu_offset = pg->mmu_gatt_start;
 		break;
 	default:
 		DRM_ERROR("Unsupported memory type %u\n", (unsigned) type);
@@ -387,11 +378,6 @@ static int psb_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
 		mem->bus.base = dev_priv->ci_region_start;;
 		mem->bus.is_iomem = true;
 		break;
-	case TTM_PL_RAR:
-		mem->bus.offset = mm_node->start << PAGE_SHIFT;
-		mem->bus.base = dev_priv->rar_region_start;;
-		mem->bus.is_iomem = true;
-		break;
 	default:
 		return -EINVAL;
 	}

drivers/staging/gma500/psb_drv.c

@@ -321,11 +321,6 @@ static void psb_do_takedown(struct drm_device *dev)
 		ttm_bo_clean_mm(bdev, TTM_PL_CI);
 		dev_priv->have_camera = 0;
 	}
-	if (dev_priv->have_rar) {
-		ttm_bo_clean_mm(bdev, TTM_PL_RAR);
-		dev_priv->have_rar = 0;
-	}
-
 }
 
 void mrst_get_fuse_settings(struct drm_device *dev)
@@ -647,7 +642,7 @@ static int psb_do_init(struct drm_device *dev)
 	if (!ttm_bo_init_mm(bdev, TTM_PL_TT,
 			pg->gatt_pages -
 			(pg->ci_start >> PAGE_SHIFT) -
-			((dev_priv->ci_region_size + dev_priv->rar_region_size)
+			((dev_priv->ci_region_size)
 			 >> PAGE_SHIFT))) {
 
 		dev_priv->have_tt = 1;
@@ -707,12 +702,6 @@ static int psb_driver_unload(struct drm_device *dev)
 					(dev_priv->mmu),
 					pg->ci_start,
 					pg->ci_stolen_size >> PAGE_SHIFT);
-			if (pg->rar_stolen_size != 0)
-				psb_mmu_remove_pfn_sequence(
-					psb_mmu_get_default_pd
-					(dev_priv->mmu),
-					pg->rar_start,
-					pg->rar_stolen_size >> PAGE_SHIFT);
 			up_read(&pg->sem);
 			psb_mmu_driver_takedown(dev_priv->mmu);
 			dev_priv->mmu = NULL;
@@ -883,7 +872,6 @@ static int psb_driver_load(struct drm_device *dev, unsigned long chipset)
 
 	/* CI/RAR use the lower half of TT. */
 	pg->ci_start = (tt_pages / 2) << PAGE_SHIFT;
-	pg->rar_start = pg->ci_start + pg->ci_stolen_size;
 
 
 	/*
@@ -901,21 +889,6 @@ static int psb_driver_load(struct drm_device *dev, unsigned long chipset)
 			goto out_err;
 	}
 
-	/*
-	 * Make MSVDX/TOPAZ MMU aware of the rar stolen memory area.
-	 */
-	if (dev_priv->pg->rar_stolen_size != 0) {
-		down_read(&pg->sem);
-		ret = psb_mmu_insert_pfn_sequence(
-				psb_mmu_get_default_pd(dev_priv->mmu),
-				dev_priv->rar_region_start >> PAGE_SHIFT,
-				pg->mmu_gatt_start + pg->rar_start,
-				pg->rar_stolen_size >> PAGE_SHIFT, 0);
-		up_read(&pg->sem);
-		if (ret)
-			goto out_err;
-	}
-
 	dev_priv->pf_pd = psb_mmu_alloc_pd(dev_priv->mmu, 1, 0);
 	if (!dev_priv->pf_pd)
 		goto out_err;

drivers/staging/gma500/psb_drv.h

@@ -605,12 +605,6 @@ struct drm_psb_private {
 	unsigned int ci_region_start;
 	unsigned int ci_region_size;
 
-	/*
-	 * RAR share buffer;
-	 */
-	unsigned int rar_region_start;
-	unsigned int rar_region_size;
-
 	/*
 	 *Memory managers
 	 */

drivers/staging/gma500/psb_gtt.c

@@ -76,7 +76,6 @@ int psb_gtt_init(struct psb_gtt *pg, int resume)
 	struct drm_psb_private *dev_priv = dev->dev_private;
 	unsigned gtt_pages;
 	unsigned long stolen_size, vram_stolen_size, ci_stolen_size;
-	unsigned long rar_stolen_size;
 	unsigned i, num_pages;
 	unsigned pfn_base;
 	uint32_t ci_pages, vram_pages;
@@ -118,8 +117,6 @@ int psb_gtt_init(struct psb_gtt *pg, int resume)
 	 * managed by TTM to stolen_size */
 	stolen_size = vram_stolen_size;
 
-	rar_stolen_size = dev_priv->rar_region_size;
-
 	printk(KERN_INFO"GMMADR(region 0) start: 0x%08x (%dM).\n",
 		pg->gatt_start, pg->gatt_pages/256);
 	printk(KERN_INFO"GTTADR(region 3) start: 0x%08x (can map %dM RAM), and actual RAM base 0x%08x.\n",
@@ -136,10 +133,6 @@ int psb_gtt_init(struct psb_gtt *pg, int resume)
 		printk(KERN_INFO"CI Stole memory: RAM base = 0x%08x, size = %lu M\n",
 				dev_priv->ci_region_start,
 				ci_stolen_size / 1024 / 1024);
-	if (rar_stolen_size > 0)
-		printk(KERN_INFO "RAR Stole memory: RAM base = 0x%08x, size = %lu M\n",
-			dev_priv->rar_region_start,
-			rar_stolen_size / 1024 / 1024);
 
 	if (resume && (gtt_pages != pg->gtt_pages) &&
 	    (stolen_size != pg->stolen_size)) {
@@ -152,7 +145,6 @@ int psb_gtt_init(struct psb_gtt *pg, int resume)
 	pg->stolen_size = stolen_size;
 	pg->vram_stolen_size = vram_stolen_size;
 	pg->ci_stolen_size = ci_stolen_size;
-	pg->rar_stolen_size = rar_stolen_size;
 	pg->gtt_map =
 	    ioremap_nocache(pg->gtt_phys_start, gtt_pages << PAGE_SHIFT);
 	if (!pg->gtt_map) {
@@ -209,20 +201,6 @@ int psb_gtt_init(struct psb_gtt *pg, int resume)
 		iowrite32(pte, ttm_gtt_map + i);
 	}
 
-	/*
-	 * insert RAR stolen pages
-	 */
-	if (rar_stolen_size != 0) {
-		pfn_base = dev_priv->rar_region_start >> PAGE_SHIFT;
-		num_pages = rar_stolen_size >> PAGE_SHIFT;
-		printk(KERN_INFO"Set up %d RAR stolen pages starting at 0x%08x, GTT offset %dK\n",
-			num_pages, pfn_base,
-			(ttm_gtt_map - pg->gtt_map + i) * 4);
-		for (; i < num_pages + ci_pages; ++i) {
-			pte = psb_gtt_mask_pte(pfn_base + i - ci_pages, 0);
-			iowrite32(pte, ttm_gtt_map + i);
-		}
-	}
 	/*
 	 * Init rest of gtt managed by TTM.
 	 */