1 /* 2 * Copyright 2012 Red Hat Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the 6 * "Software"), to deal in the Software without restriction, including 7 * without limitation the rights to use, copy, modify, merge, publish, 8 * distribute, sub license, and/or sell copies of the Software, and to 9 * permit persons to whom the Software is furnished to do so, subject to 10 * the following conditions: 11 * 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 14 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 15 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 17 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 18 * USE OR OTHER DEALINGS IN THE SOFTWARE. 19 * 20 * The above copyright notice and this permission notice (including the 21 * next paragraph) shall be included in all copies or substantial portions 22 * of the Software. 23 * 24 */ 25 /* 26 * Authors: Dave Airlie <airlied@redhat.com> 27 */ 28 29 #include <linux/pci.h> 30 31 #include <drm/drm_gem_vram_helper.h> 32 #include <drm/drm_managed.h> 33 #include <drm/drm_print.h> 34 35 #include "ast_drv.h" 36 37 static u32 ast_get_vram_size(struct ast_private *ast) 38 { 39 u8 jreg; 40 u32 vram_size; 41 42 ast_open_key(ast); 43 44 vram_size = AST_VIDMEM_DEFAULT_SIZE; 45 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xaa, 0xff); 46 switch (jreg & 3) { 47 case 0: 48 vram_size = AST_VIDMEM_SIZE_8M; 49 break; 50 case 1: 51 vram_size = AST_VIDMEM_SIZE_16M; 52 break; 53 case 2: 54 vram_size = AST_VIDMEM_SIZE_32M; 55 break; 56 case 3: 57 vram_size = AST_VIDMEM_SIZE_64M; 58 break; 59 } 60 61 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x99, 0xff); 62 switch (jreg & 0x03) { 63 case 1: 64 vram_size -= 0x100000; 65 break; 66 case 2: 67 vram_size -= 0x200000; 68 break; 69 case 3: 70 vram_size -= 0x400000; 71 break; 72 } 73 74 return vram_size; 75 } 76 77 int ast_mm_init(struct ast_private *ast) 78 { 79 struct drm_device *dev = &ast->base; 80 struct pci_dev *pdev = to_pci_dev(dev->dev); 81 resource_size_t base, size; 82 u32 vram_size; 83 int ret; 84 85 base = pci_resource_start(pdev, 0); 86 size = pci_resource_len(pdev, 0); 87 88 /* Don't fail on errors, but performance might be reduced. */ 89 devm_arch_io_reserve_memtype_wc(dev->dev, base, size); 90 devm_arch_phys_wc_add(dev->dev, base, size); 91 92 vram_size = ast_get_vram_size(ast); 93 94 ret = drmm_vram_helper_init(dev, base, vram_size); 95 if (ret) { 96 drm_err(dev, "Error initializing VRAM MM; %d\n", ret); 97 return ret; 98 } 99 100 return 0; 101 } 102