Hi Randy, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on drm-tip/drm-tip] [also build test WARNING on linus/master v5.9-rc1 next-20200818] [cannot apply to linux/master drm-intel/for-linux-next] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Randy-Dunlap/drm-ast-fix-double-__iomem-sparse-warning/20200819-043022 base: git://anongit.freedesktop.org/drm/drm-tip drm-tip config: i386-randconfig-s002-20200818 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.2-183-gaa6ede3b-dirty # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> drivers/gpu/drm/ast/ast_cursor.c:42:59: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void *vaddr @@ got void [noderef] __iomem * @@ >> drivers/gpu/drm/ast/ast_cursor.c:42:59: sparse: expected void *vaddr >> drivers/gpu/drm/ast/ast_cursor.c:42:59: sparse: got void [noderef] __iomem * >> drivers/gpu/drm/ast/ast_cursor.c:80:23: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void [noderef] __iomem *vaddr @@ got void * @@ >> drivers/gpu/drm/ast/ast_cursor.c:80:23: sparse: expected void [noderef] __iomem *vaddr >> drivers/gpu/drm/ast/ast_cursor.c:80:23: sparse: got void * drivers/gpu/drm/ast/ast_cursor.c:98:59: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void *vaddr @@ got void [noderef] __iomem * @@ drivers/gpu/drm/ast/ast_cursor.c:98:59: sparse: expected void *vaddr drivers/gpu/drm/ast/ast_cursor.c:98:59: sparse: got void [noderef] __iomem * >> drivers/gpu/drm/ast/ast_cursor.c:126:19: sparse: sparse: cast removes address space '__iomem' of expression >> drivers/gpu/drm/ast/ast_cursor.c:126:16: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected unsigned char [noderef] [usertype] __iomem *dstxor @@ got unsigned char [usertype] * @@ >> drivers/gpu/drm/ast/ast_cursor.c:126:16: sparse: expected unsigned char [noderef] [usertype] __iomem *dstxor >> drivers/gpu/drm/ast/ast_cursor.c:126:16: sparse: got unsigned char [usertype] * # https://github.com/0day-ci/linux/commit/7e1ff39fdb33febec4c542a6be21c28b352eb588 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Randy-Dunlap/drm-ast-fix-double-__iomem-sparse-warning/20200819-043022 git checkout 7e1ff39fdb33febec4c542a6be21c28b352eb588 vim +42 drivers/gpu/drm/ast/ast_cursor.c 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 34 3e9d787371eaa84 Thomas Zimmermann 2020-07-02 35 static void ast_cursor_fini(struct ast_private *ast) 3e9d787371eaa84 Thomas Zimmermann 2020-07-02 36 { 3e9d787371eaa84 Thomas Zimmermann 2020-07-02 37 size_t i; 3e9d787371eaa84 Thomas Zimmermann 2020-07-02 38 struct drm_gem_vram_object *gbo; 3e9d787371eaa84 Thomas Zimmermann 2020-07-02 39 3e9d787371eaa84 Thomas Zimmermann 2020-07-02 40 for (i = 0; i < ARRAY_SIZE(ast->cursor.gbo); ++i) { 3e9d787371eaa84 Thomas Zimmermann 2020-07-02 41 gbo = ast->cursor.gbo[i]; 3e9d787371eaa84 Thomas Zimmermann 2020-07-02 @42 drm_gem_vram_vunmap(gbo, ast->cursor.vaddr[i]); 3e9d787371eaa84 Thomas Zimmermann 2020-07-02 43 drm_gem_vram_unpin(gbo); 3e9d787371eaa84 Thomas Zimmermann 2020-07-02 44 drm_gem_vram_put(gbo); 3e9d787371eaa84 Thomas Zimmermann 2020-07-02 45 } 3e9d787371eaa84 Thomas Zimmermann 2020-07-02 46 } 3e9d787371eaa84 Thomas Zimmermann 2020-07-02 47 3e9d787371eaa84 Thomas Zimmermann 2020-07-02 48 static void ast_cursor_release(struct drm_device *dev, void *ptr) 3e9d787371eaa84 Thomas Zimmermann 2020-07-02 49 { 365c0e70da83a52 Thomas Zimmermann 2020-07-30 50 struct ast_private *ast = to_ast_private(dev); 3e9d787371eaa84 Thomas Zimmermann 2020-07-02 51 3e9d787371eaa84 Thomas Zimmermann 2020-07-02 52 ast_cursor_fini(ast); 3e9d787371eaa84 Thomas Zimmermann 2020-07-02 53 } 3e9d787371eaa84 Thomas Zimmermann 2020-07-02 54 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 55 /* 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 56 * Allocate cursor BOs and pins them at the end of VRAM. 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 57 */ beb2355eecbf67d Thomas Zimmermann 2020-07-02 58 int ast_cursor_init(struct ast_private *ast) 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 59 { e0f5a738cfe572b Thomas Zimmermann 2020-07-30 60 struct drm_device *dev = &ast->base; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 61 size_t size, i; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 62 struct drm_gem_vram_object *gbo; 0d384eec10ea723 Thomas Zimmermann 2020-07-02 63 void __iomem *vaddr; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 64 int ret; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 65 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 66 size = roundup(AST_HWC_SIZE + AST_HWC_SIGNATURE_SIZE, PAGE_SIZE); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 67 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 68 for (i = 0; i < ARRAY_SIZE(ast->cursor.gbo); ++i) { 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 69 gbo = drm_gem_vram_create(dev, size, 0); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 70 if (IS_ERR(gbo)) { 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 71 ret = PTR_ERR(gbo); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 72 goto err_drm_gem_vram_put; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 73 } 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 74 ret = drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_VRAM | 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 75 DRM_GEM_VRAM_PL_FLAG_TOPDOWN); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 76 if (ret) { 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 77 drm_gem_vram_put(gbo); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 78 goto err_drm_gem_vram_put; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 79 } 0d384eec10ea723 Thomas Zimmermann 2020-07-02 @80 vaddr = drm_gem_vram_vmap(gbo); 0d384eec10ea723 Thomas Zimmermann 2020-07-02 81 if (IS_ERR(vaddr)) { 0d384eec10ea723 Thomas Zimmermann 2020-07-02 82 ret = PTR_ERR(vaddr); 0d384eec10ea723 Thomas Zimmermann 2020-07-02 83 drm_gem_vram_unpin(gbo); 0d384eec10ea723 Thomas Zimmermann 2020-07-02 84 drm_gem_vram_put(gbo); 0d384eec10ea723 Thomas Zimmermann 2020-07-02 85 goto err_drm_gem_vram_put; 0d384eec10ea723 Thomas Zimmermann 2020-07-02 86 } 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 87 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 88 ast->cursor.gbo[i] = gbo; 0d384eec10ea723 Thomas Zimmermann 2020-07-02 89 ast->cursor.vaddr[i] = vaddr; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 90 } 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 91 3e9d787371eaa84 Thomas Zimmermann 2020-07-02 92 return drmm_add_action_or_reset(dev, ast_cursor_release, NULL); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 93 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 94 err_drm_gem_vram_put: 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 95 while (i) { 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 96 --i; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 97 gbo = ast->cursor.gbo[i]; 0d384eec10ea723 Thomas Zimmermann 2020-07-02 98 drm_gem_vram_vunmap(gbo, ast->cursor.vaddr[i]); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 99 drm_gem_vram_unpin(gbo); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 100 drm_gem_vram_put(gbo); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 101 } 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 102 return ret; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 103 } 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 104 932a62aa3bfd96e Thomas Zimmermann 2020-07-02 105 static void update_cursor_image(u8 __iomem *dst, const u8 *src, int width, int height) 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 106 { 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 107 union { 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 108 u32 ul; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 109 u8 b[4]; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 110 } srcdata32[2], data32; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 111 union { 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 112 u16 us; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 113 u8 b[2]; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 114 } data16; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 115 u32 csum = 0; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 116 s32 alpha_dst_delta, last_alpha_dst_delta; 932a62aa3bfd96e Thomas Zimmermann 2020-07-02 117 u8 __iomem *dstxor; 932a62aa3bfd96e Thomas Zimmermann 2020-07-02 118 const u8 *srcxor; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 119 int i, j; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 120 u32 per_pixel_copy, two_pixel_copy; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 121 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 122 alpha_dst_delta = AST_MAX_HWC_WIDTH << 1; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 123 last_alpha_dst_delta = alpha_dst_delta - (width << 1); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 124 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 125 srcxor = src; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 @126 dstxor = (u8 *)dst + last_alpha_dst_delta + (AST_MAX_HWC_HEIGHT - height) * alpha_dst_delta; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 127 per_pixel_copy = width & 1; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 128 two_pixel_copy = width >> 1; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 129 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 130 for (j = 0; j < height; j++) { 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 131 for (i = 0; i < two_pixel_copy; i++) { 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 132 srcdata32[0].ul = *((u32 *)srcxor) & 0xf0f0f0f0; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 133 srcdata32[1].ul = *((u32 *)(srcxor + 4)) & 0xf0f0f0f0; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 134 data32.b[0] = srcdata32[0].b[1] | (srcdata32[0].b[0] >> 4); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 135 data32.b[1] = srcdata32[0].b[3] | (srcdata32[0].b[2] >> 4); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 136 data32.b[2] = srcdata32[1].b[1] | (srcdata32[1].b[0] >> 4); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 137 data32.b[3] = srcdata32[1].b[3] | (srcdata32[1].b[2] >> 4); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 138 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 139 writel(data32.ul, dstxor); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 140 csum += data32.ul; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 141 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 142 dstxor += 4; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 143 srcxor += 8; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 144 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 145 } 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 146 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 147 for (i = 0; i < per_pixel_copy; i++) { 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 148 srcdata32[0].ul = *((u32 *)srcxor) & 0xf0f0f0f0; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 149 data16.b[0] = srcdata32[0].b[1] | (srcdata32[0].b[0] >> 4); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 150 data16.b[1] = srcdata32[0].b[3] | (srcdata32[0].b[2] >> 4); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 151 writew(data16.us, dstxor); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 152 csum += (u32)data16.us; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 153 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 154 dstxor += 2; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 155 srcxor += 4; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 156 } 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 157 dstxor += last_alpha_dst_delta; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 158 } 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 159 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 160 /* write checksum + signature */ 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 161 dst += AST_HWC_SIZE; 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 162 writel(csum, dst); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 163 writel(width, dst + AST_HWC_SIGNATURE_SizeX); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 164 writel(height, dst + AST_HWC_SIGNATURE_SizeY); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 165 writel(0, dst + AST_HWC_SIGNATURE_HOTSPOTX); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 166 writel(0, dst + AST_HWC_SIGNATURE_HOTSPOTY); 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 167 } 2ccebf561e4a902 Thomas Zimmermann 2020-07-02 168 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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