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1/*2 * Copyright © 2007 David Airlie3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice (including the next12 * paragraph) shall be included in all copies or substantial portions of the13 * Software.14 *15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER21 * DEALINGS IN THE SOFTWARE.22 *23 * Authors:24 * David Airlie25 */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 41static 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 55static int radeon_fbdev_create_pinned_object(struct drm_fb_helper *fb_helper,56 struct drm_mode_fb_cmd2 *mode_cmd,57 struct drm_gem_object **gobj_p)58{59 const struct drm_format_info *info;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 info = drm_get_format_info(rdev_to_drm(rdev), mode_cmd);71 cpp = info->cpp[0];72 73 /* need to align pitch with crtc limits */74 mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, cpp,75 fb_tiled);76 77 if (rdev->family >= CHIP_R600)78 height = ALIGN(mode_cmd->height, 8);79 size = mode_cmd->pitches[0] * height;80 aligned_size = ALIGN(size, PAGE_SIZE);81 ret = radeon_gem_object_create(rdev, aligned_size, 0,82 RADEON_GEM_DOMAIN_VRAM,83 0, true, &gobj);84 if (ret) {85 pr_err("failed to allocate framebuffer (%d)\n", aligned_size);86 return -ENOMEM;87 }88 rbo = gem_to_radeon_bo(gobj);89 90 if (fb_tiled)91 tiling_flags = RADEON_TILING_MACRO;92 93#ifdef __BIG_ENDIAN94 switch (cpp) {95 case 4:96 tiling_flags |= RADEON_TILING_SWAP_32BIT;97 break;98 case 2:99 tiling_flags |= RADEON_TILING_SWAP_16BIT;100 break;101 default:102 break;103 }104#endif105 106 if (tiling_flags) {107 ret = radeon_bo_set_tiling_flags(rbo,108 tiling_flags | RADEON_TILING_SURFACE,109 mode_cmd->pitches[0]);110 if (ret)111 dev_err(rdev->dev, "FB failed to set tiling flags\n");112 }113 114 ret = radeon_bo_reserve(rbo, false);115 if (unlikely(ret != 0))116 goto err_radeon_fbdev_destroy_pinned_object;117 /* Only 27 bit offset for legacy CRTC */118 ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,119 ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,120 NULL);121 if (ret) {122 radeon_bo_unreserve(rbo);123 goto err_radeon_fbdev_destroy_pinned_object;124 }125 if (fb_tiled)126 radeon_bo_check_tiling(rbo, 0, 0);127 ret = radeon_bo_kmap(rbo, NULL);128 radeon_bo_unreserve(rbo);129 if (ret)130 goto err_radeon_fbdev_destroy_pinned_object;131 132 *gobj_p = gobj;133 return 0;134 135err_radeon_fbdev_destroy_pinned_object:136 radeon_fbdev_destroy_pinned_object(gobj);137 *gobj_p = NULL;138 return ret;139}140 141/*142 * Fbdev ops and struct fb_ops143 */144 145static int radeon_fbdev_fb_open(struct fb_info *info, int user)146{147 struct drm_fb_helper *fb_helper = info->par;148 struct radeon_device *rdev = fb_helper->dev->dev_private;149 int ret;150 151 ret = pm_runtime_get_sync(rdev_to_drm(rdev)->dev);152 if (ret < 0 && ret != -EACCES)153 goto err_pm_runtime_mark_last_busy;154 155 return 0;156 157err_pm_runtime_mark_last_busy:158 pm_runtime_mark_last_busy(rdev_to_drm(rdev)->dev);159 pm_runtime_put_autosuspend(rdev_to_drm(rdev)->dev);160 return ret;161}162 163static int radeon_fbdev_fb_release(struct fb_info *info, int user)164{165 struct drm_fb_helper *fb_helper = info->par;166 struct radeon_device *rdev = fb_helper->dev->dev_private;167 168 pm_runtime_mark_last_busy(rdev_to_drm(rdev)->dev);169 pm_runtime_put_autosuspend(rdev_to_drm(rdev)->dev);170 171 return 0;172}173 174static void radeon_fbdev_fb_destroy(struct fb_info *info)175{176 struct drm_fb_helper *fb_helper = info->par;177 struct drm_framebuffer *fb = fb_helper->fb;178 struct drm_gem_object *gobj = drm_gem_fb_get_obj(fb, 0);179 180 drm_fb_helper_fini(fb_helper);181 182 drm_framebuffer_unregister_private(fb);183 drm_framebuffer_cleanup(fb);184 kfree(fb);185 radeon_fbdev_destroy_pinned_object(gobj);186 187 drm_client_release(&fb_helper->client);188 drm_fb_helper_unprepare(fb_helper);189 kfree(fb_helper);190}191 192static const struct fb_ops radeon_fbdev_fb_ops = {193 .owner = THIS_MODULE,194 .fb_open = radeon_fbdev_fb_open,195 .fb_release = radeon_fbdev_fb_release,196 FB_DEFAULT_IOMEM_OPS,197 DRM_FB_HELPER_DEFAULT_OPS,198 .fb_destroy = radeon_fbdev_fb_destroy,199};200 201/*202 * Fbdev helpers and struct drm_fb_helper_funcs203 */204 205static int radeon_fbdev_fb_helper_fb_probe(struct drm_fb_helper *fb_helper,206 struct drm_fb_helper_surface_size *sizes)207{208 struct radeon_device *rdev = fb_helper->dev->dev_private;209 struct drm_mode_fb_cmd2 mode_cmd = { };210 struct fb_info *info;211 struct drm_gem_object *gobj;212 struct radeon_bo *rbo;213 struct drm_framebuffer *fb;214 int ret;215 unsigned long tmp;216 217 mode_cmd.width = sizes->surface_width;218 mode_cmd.height = sizes->surface_height;219 220 /* avivo can't scanout real 24bpp */221 if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))222 sizes->surface_bpp = 32;223 224 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,225 sizes->surface_depth);226 227 ret = radeon_fbdev_create_pinned_object(fb_helper, &mode_cmd, &gobj);228 if (ret) {229 DRM_ERROR("failed to create fbcon object %d\n", ret);230 return ret;231 }232 rbo = gem_to_radeon_bo(gobj);233 234 fb = kzalloc(sizeof(*fb), GFP_KERNEL);235 if (!fb) {236 ret = -ENOMEM;237 goto err_radeon_fbdev_destroy_pinned_object;238 }239 ret = radeon_framebuffer_init(rdev_to_drm(rdev), fb, &mode_cmd, gobj);240 if (ret) {241 DRM_ERROR("failed to initialize framebuffer %d\n", ret);242 goto err_kfree;243 }244 245 /* setup helper */246 fb_helper->fb = fb;247 248 /* okay we have an object now allocate the framebuffer */249 info = drm_fb_helper_alloc_info(fb_helper);250 if (IS_ERR(info)) {251 ret = PTR_ERR(info);252 goto err_drm_framebuffer_unregister_private;253 }254 255 info->fbops = &radeon_fbdev_fb_ops;256 257 /* radeon resume is fragile and needs a vt switch to help it along */258 info->skip_vt_switch = false;259 260 drm_fb_helper_fill_info(info, fb_helper, sizes);261 262 tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;263 info->fix.smem_start = rdev->mc.aper_base + tmp;264 info->fix.smem_len = radeon_bo_size(rbo);265 info->screen_base = (__force void __iomem *)rbo->kptr;266 info->screen_size = radeon_bo_size(rbo);267 268 memset_io(info->screen_base, 0, info->screen_size);269 270 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */271 272 DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start);273 DRM_INFO("vram apper at 0x%lX\n", (unsigned long)rdev->mc.aper_base);274 DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));275 DRM_INFO("fb depth is %d\n", fb->format->depth);276 DRM_INFO(" pitch is %d\n", fb->pitches[0]);277 278 return 0;279 280err_drm_framebuffer_unregister_private:281 fb_helper->fb = NULL;282 drm_framebuffer_unregister_private(fb);283 drm_framebuffer_cleanup(fb);284err_kfree:285 kfree(fb);286err_radeon_fbdev_destroy_pinned_object:287 radeon_fbdev_destroy_pinned_object(gobj);288 return ret;289}290 291static const struct drm_fb_helper_funcs radeon_fbdev_fb_helper_funcs = {292 .fb_probe = radeon_fbdev_fb_helper_fb_probe,293};294 295/*296 * Fbdev client and struct drm_client_funcs297 */298 299static void radeon_fbdev_client_unregister(struct drm_client_dev *client)300{301 struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);302 struct drm_device *dev = fb_helper->dev;303 struct radeon_device *rdev = dev->dev_private;304 305 if (fb_helper->info) {306 vga_switcheroo_client_fb_set(rdev->pdev, NULL);307 drm_helper_force_disable_all(dev);308 drm_fb_helper_unregister_info(fb_helper);309 } else {310 drm_client_release(&fb_helper->client);311 drm_fb_helper_unprepare(fb_helper);312 kfree(fb_helper);313 }314}315 316static int radeon_fbdev_client_restore(struct drm_client_dev *client)317{318 drm_fb_helper_lastclose(client->dev);319 vga_switcheroo_process_delayed_switch();320 321 return 0;322}323 324static int radeon_fbdev_client_hotplug(struct drm_client_dev *client)325{326 struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);327 struct drm_device *dev = client->dev;328 struct radeon_device *rdev = dev->dev_private;329 int ret;330 331 if (dev->fb_helper)332 return drm_fb_helper_hotplug_event(dev->fb_helper);333 334 ret = drm_fb_helper_init(dev, fb_helper);335 if (ret)336 goto err_drm_err;337 338 if (!drm_drv_uses_atomic_modeset(dev))339 drm_helper_disable_unused_functions(dev);340 341 ret = drm_fb_helper_initial_config(fb_helper);342 if (ret)343 goto err_drm_fb_helper_fini;344 345 vga_switcheroo_client_fb_set(rdev->pdev, fb_helper->info);346 347 return 0;348 349err_drm_fb_helper_fini:350 drm_fb_helper_fini(fb_helper);351err_drm_err:352 drm_err(dev, "Failed to setup radeon fbdev emulation (ret=%d)\n", ret);353 return ret;354}355 356static const struct drm_client_funcs radeon_fbdev_client_funcs = {357 .owner = THIS_MODULE,358 .unregister = radeon_fbdev_client_unregister,359 .restore = radeon_fbdev_client_restore,360 .hotplug = radeon_fbdev_client_hotplug,361};362 363void radeon_fbdev_setup(struct radeon_device *rdev)364{365 struct drm_fb_helper *fb_helper;366 int bpp_sel = 32;367 int ret;368 369 if (rdev->mc.real_vram_size <= (8 * 1024 * 1024))370 bpp_sel = 8;371 else if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32 * 1024 * 1024))372 bpp_sel = 16;373 374 fb_helper = kzalloc(sizeof(*fb_helper), GFP_KERNEL);375 if (!fb_helper)376 return;377 drm_fb_helper_prepare(rdev_to_drm(rdev), fb_helper, bpp_sel, &radeon_fbdev_fb_helper_funcs);378 379 ret = drm_client_init(rdev_to_drm(rdev), &fb_helper->client, "radeon-fbdev",380 &radeon_fbdev_client_funcs);381 if (ret) {382 drm_err(rdev_to_drm(rdev), "Failed to register client: %d\n", ret);383 goto err_drm_client_init;384 }385 386 drm_client_register(&fb_helper->client);387 388 return;389 390err_drm_client_init:391 drm_fb_helper_unprepare(fb_helper);392 kfree(fb_helper);393}394 395void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)396{397 if (rdev_to_drm(rdev)->fb_helper)398 drm_fb_helper_set_suspend(rdev_to_drm(rdev)->fb_helper, state);399}400 401bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)402{403 struct drm_fb_helper *fb_helper = rdev_to_drm(rdev)->fb_helper;404 struct drm_gem_object *gobj;405 406 if (!fb_helper)407 return false;408 409 gobj = drm_gem_fb_get_obj(fb_helper->fb, 0);410 if (!gobj)411 return false;412 if (gobj != &robj->tbo.base)413 return false;414 415 return true;416}417