1 /* 2 * Copyright © 2007 David Airlie 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 21 * DEALINGS IN THE SOFTWARE. 22 * 23 * Authors: 24 * David Airlie 25 */ 26 27 #include <linux/fb.h> 28 #include <linux/pci.h> 29 #include <linux/pm_runtime.h> 30 #include <linux/vga_switcheroo.h> 31 32 #include <drm/drm_crtc_helper.h> 33 #include <drm/drm_drv.h> 34 #include <drm/drm_fb_helper.h> 35 #include <drm/drm_fourcc.h> 36 #include <drm/drm_framebuffer.h> 37 #include <drm/drm_gem_framebuffer_helper.h> 38 39 #include "radeon.h" 40 41 static void radeon_fbdev_destroy_pinned_object(struct drm_gem_object *gobj) 42 { 43 struct radeon_bo *rbo = gem_to_radeon_bo(gobj); 44 int ret; 45 46 ret = radeon_bo_reserve(rbo, false); 47 if (likely(ret == 0)) { 48 radeon_bo_kunmap(rbo); 49 radeon_bo_unpin(rbo); 50 radeon_bo_unreserve(rbo); 51 } 52 drm_gem_object_put(gobj); 53 } 54 55 static int radeon_fbdev_create_pinned_object(struct drm_fb_helper *fb_helper, 56 const struct drm_format_info *info, 57 struct drm_mode_fb_cmd2 *mode_cmd, 58 struct drm_gem_object **gobj_p) 59 { 60 struct radeon_device *rdev = fb_helper->dev->dev_private; 61 struct drm_gem_object *gobj = NULL; 62 struct radeon_bo *rbo = NULL; 63 bool fb_tiled = false; /* useful for testing */ 64 u32 tiling_flags = 0; 65 int ret; 66 int aligned_size, size; 67 int height = mode_cmd->height; 68 u32 cpp; 69 70 cpp = info->cpp[0]; 71 72 /* need to align pitch with crtc limits */ 73 mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, cpp, 74 fb_tiled); 75 76 if (rdev->family >= CHIP_R600) 77 height = ALIGN(mode_cmd->height, 8); 78 size = mode_cmd->pitches[0] * height; 79 aligned_size = ALIGN(size, PAGE_SIZE); 80 ret = radeon_gem_object_create(rdev, aligned_size, 0, 81 RADEON_GEM_DOMAIN_VRAM, 82 0, true, &gobj); 83 if (ret) { 84 pr_err("failed to allocate framebuffer (%d)\n", aligned_size); 85 return -ENOMEM; 86 } 87 rbo = gem_to_radeon_bo(gobj); 88 89 if (fb_tiled) 90 tiling_flags = RADEON_TILING_MACRO; 91 92 #ifdef __BIG_ENDIAN 93 switch (cpp) { 94 case 4: 95 tiling_flags |= RADEON_TILING_SWAP_32BIT; 96 break; 97 case 2: 98 tiling_flags |= RADEON_TILING_SWAP_16BIT; 99 break; 100 default: 101 break; 102 } 103 #endif 104 105 if (tiling_flags) { 106 ret = radeon_bo_set_tiling_flags(rbo, 107 tiling_flags | RADEON_TILING_SURFACE, 108 mode_cmd->pitches[0]); 109 if (ret) 110 dev_err(rdev->dev, "FB failed to set tiling flags\n"); 111 } 112 113 ret = radeon_bo_reserve(rbo, false); 114 if (unlikely(ret != 0)) 115 goto err_radeon_fbdev_destroy_pinned_object; 116 /* Only 27 bit offset for legacy CRTC */ 117 ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM, 118 ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27, 119 NULL); 120 if (ret) { 121 radeon_bo_unreserve(rbo); 122 goto err_radeon_fbdev_destroy_pinned_object; 123 } 124 if (fb_tiled) 125 radeon_bo_check_tiling(rbo, 0, 0); 126 ret = radeon_bo_kmap(rbo, NULL); 127 radeon_bo_unreserve(rbo); 128 if (ret) 129 goto err_radeon_fbdev_destroy_pinned_object; 130 131 *gobj_p = gobj; 132 return 0; 133 134 err_radeon_fbdev_destroy_pinned_object: 135 radeon_fbdev_destroy_pinned_object(gobj); 136 *gobj_p = NULL; 137 return ret; 138 } 139 140 /* 141 * Fbdev ops and struct fb_ops 142 */ 143 144 static int radeon_fbdev_fb_open(struct fb_info *info, int user) 145 { 146 struct drm_fb_helper *fb_helper = info->par; 147 struct radeon_device *rdev = fb_helper->dev->dev_private; 148 int ret; 149 150 ret = pm_runtime_get_sync(rdev_to_drm(rdev)->dev); 151 if (ret < 0 && ret != -EACCES) 152 goto err_pm_runtime_mark_last_busy; 153 154 return 0; 155 156 err_pm_runtime_mark_last_busy: 157 pm_runtime_mark_last_busy(rdev_to_drm(rdev)->dev); 158 pm_runtime_put_autosuspend(rdev_to_drm(rdev)->dev); 159 return ret; 160 } 161 162 static int radeon_fbdev_fb_release(struct fb_info *info, int user) 163 { 164 struct drm_fb_helper *fb_helper = info->par; 165 struct radeon_device *rdev = fb_helper->dev->dev_private; 166 167 pm_runtime_mark_last_busy(rdev_to_drm(rdev)->dev); 168 pm_runtime_put_autosuspend(rdev_to_drm(rdev)->dev); 169 170 return 0; 171 } 172 173 static void radeon_fbdev_fb_destroy(struct fb_info *info) 174 { 175 struct drm_fb_helper *fb_helper = info->par; 176 struct drm_framebuffer *fb = fb_helper->fb; 177 struct drm_gem_object *gobj = drm_gem_fb_get_obj(fb, 0); 178 179 drm_fb_helper_fini(fb_helper); 180 181 drm_framebuffer_unregister_private(fb); 182 drm_framebuffer_cleanup(fb); 183 kfree(fb); 184 radeon_fbdev_destroy_pinned_object(gobj); 185 186 drm_client_release(&fb_helper->client); 187 drm_fb_helper_unprepare(fb_helper); 188 kfree(fb_helper); 189 } 190 191 static const struct fb_ops radeon_fbdev_fb_ops = { 192 .owner = THIS_MODULE, 193 .fb_open = radeon_fbdev_fb_open, 194 .fb_release = radeon_fbdev_fb_release, 195 FB_DEFAULT_IOMEM_OPS, 196 DRM_FB_HELPER_DEFAULT_OPS, 197 .fb_destroy = radeon_fbdev_fb_destroy, 198 }; 199 200 static const struct drm_fb_helper_funcs radeon_fbdev_fb_helper_funcs = { 201 }; 202 203 int radeon_fbdev_driver_fbdev_probe(struct drm_fb_helper *fb_helper, 204 struct drm_fb_helper_surface_size *sizes) 205 { 206 struct radeon_device *rdev = fb_helper->dev->dev_private; 207 const struct drm_format_info *format_info; 208 struct drm_mode_fb_cmd2 mode_cmd = { }; 209 struct fb_info *info; 210 struct drm_gem_object *gobj; 211 struct radeon_bo *rbo; 212 struct drm_framebuffer *fb; 213 int ret; 214 unsigned long tmp; 215 216 mode_cmd.width = sizes->surface_width; 217 mode_cmd.height = sizes->surface_height; 218 219 /* avivo can't scanout real 24bpp */ 220 if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev)) 221 sizes->surface_bpp = 32; 222 223 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 224 sizes->surface_depth); 225 226 format_info = drm_get_format_info(rdev_to_drm(rdev), mode_cmd.pixel_format, 227 mode_cmd.modifier[0]); 228 ret = radeon_fbdev_create_pinned_object(fb_helper, format_info, &mode_cmd, &gobj); 229 if (ret) { 230 DRM_ERROR("failed to create fbcon object %d\n", ret); 231 return ret; 232 } 233 rbo = gem_to_radeon_bo(gobj); 234 235 fb = kzalloc(sizeof(*fb), GFP_KERNEL); 236 if (!fb) { 237 ret = -ENOMEM; 238 goto err_radeon_fbdev_destroy_pinned_object; 239 } 240 ret = radeon_framebuffer_init(rdev_to_drm(rdev), fb, format_info, &mode_cmd, gobj); 241 if (ret) { 242 DRM_ERROR("failed to initialize framebuffer %d\n", ret); 243 goto err_kfree; 244 } 245 246 /* setup helper */ 247 fb_helper->funcs = &radeon_fbdev_fb_helper_funcs; 248 fb_helper->fb = fb; 249 250 /* okay we have an object now allocate the framebuffer */ 251 info = drm_fb_helper_alloc_info(fb_helper); 252 if (IS_ERR(info)) { 253 ret = PTR_ERR(info); 254 goto err_drm_framebuffer_unregister_private; 255 } 256 257 info->fbops = &radeon_fbdev_fb_ops; 258 259 /* radeon resume is fragile and needs a vt switch to help it along */ 260 info->skip_vt_switch = false; 261 262 drm_fb_helper_fill_info(info, fb_helper, sizes); 263 264 tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start; 265 info->fix.smem_start = rdev->mc.aper_base + tmp; 266 info->fix.smem_len = radeon_bo_size(rbo); 267 info->screen_base = (__force void __iomem *)rbo->kptr; 268 info->screen_size = radeon_bo_size(rbo); 269 270 memset_io(info->screen_base, 0, info->screen_size); 271 272 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 273 274 DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start); 275 DRM_INFO("vram apper at 0x%lX\n", (unsigned long)rdev->mc.aper_base); 276 DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo)); 277 DRM_INFO("fb depth is %d\n", fb->format->depth); 278 DRM_INFO(" pitch is %d\n", fb->pitches[0]); 279 280 return 0; 281 282 err_drm_framebuffer_unregister_private: 283 fb_helper->fb = NULL; 284 drm_framebuffer_unregister_private(fb); 285 drm_framebuffer_cleanup(fb); 286 err_kfree: 287 kfree(fb); 288 err_radeon_fbdev_destroy_pinned_object: 289 radeon_fbdev_destroy_pinned_object(gobj); 290 return ret; 291 } 292 293 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj) 294 { 295 struct drm_fb_helper *fb_helper = rdev_to_drm(rdev)->fb_helper; 296 struct drm_gem_object *gobj; 297 298 if (!fb_helper) 299 return false; 300 301 gobj = drm_gem_fb_get_obj(fb_helper->fb, 0); 302 if (!gobj) 303 return false; 304 if (gobj != &robj->tbo.base) 305 return false; 306 307 return true; 308 } 309