1/* 2 * Copyright 2012 Red Hat 3 * 4 * This file is subject to the terms and conditions of the GNU General 5 * Public License version 2. See the file COPYING in the main 6 * directory of this archive for more details. 7 * 8 * Authors: Matthew Garrett 9 * Dave Airlie 10 */ 11#include <linux/module.h> 12#include <drm/drmP.h> 13#include <drm/drm_fb_helper.h> 14#include <drm/drm_crtc_helper.h> 15 16#include <linux/fb.h> 17 18#include "cirrus_drv.h" 19 20static void cirrus_dirty_update(struct cirrus_fbdev *afbdev, 21 int x, int y, int width, int height) 22{ 23 int i; 24 struct drm_gem_object *obj; 25 struct cirrus_bo *bo; 26 int src_offset, dst_offset; 27 int bpp = (afbdev->gfb.base.bits_per_pixel + 7)/8; 28 int ret = -EBUSY; 29 bool unmap = false; 30 bool store_for_later = false; 31 int x2, y2; 32 unsigned long flags; 33 34 obj = afbdev->gfb.obj; 35 bo = gem_to_cirrus_bo(obj); 36 37 /* 38 * try and reserve the BO, if we fail with busy 39 * then the BO is being moved and we should 40 * store up the damage until later. 41 */ 42 if (drm_can_sleep()) 43 ret = cirrus_bo_reserve(bo, true); 44 if (ret) { 45 if (ret != -EBUSY) 46 return; 47 store_for_later = true; 48 } 49 50 x2 = x + width - 1; 51 y2 = y + height - 1; 52 spin_lock_irqsave(&afbdev->dirty_lock, flags); 53 54 if (afbdev->y1 < y) 55 y = afbdev->y1; 56 if (afbdev->y2 > y2) 57 y2 = afbdev->y2; 58 if (afbdev->x1 < x) 59 x = afbdev->x1; 60 if (afbdev->x2 > x2) 61 x2 = afbdev->x2; 62 63 if (store_for_later) { 64 afbdev->x1 = x; 65 afbdev->x2 = x2; 66 afbdev->y1 = y; 67 afbdev->y2 = y2; 68 spin_unlock_irqrestore(&afbdev->dirty_lock, flags); 69 return; 70 } 71 72 afbdev->x1 = afbdev->y1 = INT_MAX; 73 afbdev->x2 = afbdev->y2 = 0; 74 spin_unlock_irqrestore(&afbdev->dirty_lock, flags); 75 76 if (!bo->kmap.virtual) { 77 ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap); 78 if (ret) { 79 DRM_ERROR("failed to kmap fb updates\n"); 80 cirrus_bo_unreserve(bo); 81 return; 82 } 83 unmap = true; 84 } 85 for (i = y; i < y + height; i++) { 86 /* assume equal stride for now */ 87 src_offset = dst_offset = i * afbdev->gfb.base.pitches[0] + (x * bpp); 88 memcpy_toio(bo->kmap.virtual + src_offset, afbdev->sysram + src_offset, width * bpp); 89 90 } 91 if (unmap) 92 ttm_bo_kunmap(&bo->kmap); 93 94 cirrus_bo_unreserve(bo); 95} 96 97static void cirrus_fillrect(struct fb_info *info, 98 const struct fb_fillrect *rect) 99{ 100 struct cirrus_fbdev *afbdev = info->par; 101 sys_fillrect(info, rect); 102 cirrus_dirty_update(afbdev, rect->dx, rect->dy, rect->width, 103 rect->height); 104} 105 106static void cirrus_copyarea(struct fb_info *info, 107 const struct fb_copyarea *area) 108{ 109 struct cirrus_fbdev *afbdev = info->par; 110 sys_copyarea(info, area); 111 cirrus_dirty_update(afbdev, area->dx, area->dy, area->width, 112 area->height); 113} 114 115static void cirrus_imageblit(struct fb_info *info, 116 const struct fb_image *image) 117{ 118 struct cirrus_fbdev *afbdev = info->par; 119 sys_imageblit(info, image); 120 cirrus_dirty_update(afbdev, image->dx, image->dy, image->width, 121 image->height); 122} 123 124 125static struct fb_ops cirrusfb_ops = { 126 .owner = THIS_MODULE, 127 .fb_check_var = drm_fb_helper_check_var, 128 .fb_set_par = drm_fb_helper_set_par, 129 .fb_fillrect = cirrus_fillrect, 130 .fb_copyarea = cirrus_copyarea, 131 .fb_imageblit = cirrus_imageblit, 132 .fb_pan_display = drm_fb_helper_pan_display, 133 .fb_blank = drm_fb_helper_blank, 134 .fb_setcmap = drm_fb_helper_setcmap, 135}; 136 137static int cirrusfb_create_object(struct cirrus_fbdev *afbdev, 138 struct drm_mode_fb_cmd2 *mode_cmd, 139 struct drm_gem_object **gobj_p) 140{ 141 struct drm_device *dev = afbdev->helper.dev; 142 struct cirrus_device *cdev = dev->dev_private; 143 u32 bpp, depth; 144 u32 size; 145 struct drm_gem_object *gobj; 146 147 int ret = 0; 148 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp); 149 150 if (!cirrus_check_framebuffer(cdev, mode_cmd->width, mode_cmd->height, 151 bpp, mode_cmd->pitches[0])) 152 return -EINVAL; 153 154 size = mode_cmd->pitches[0] * mode_cmd->height; 155 ret = cirrus_gem_create(dev, size, true, &gobj); 156 if (ret) 157 return ret; 158 159 *gobj_p = gobj; 160 return ret; 161} 162 163static int cirrusfb_create(struct drm_fb_helper *helper, 164 struct drm_fb_helper_surface_size *sizes) 165{ 166 struct cirrus_fbdev *gfbdev = 167 container_of(helper, struct cirrus_fbdev, helper); 168 struct drm_device *dev = gfbdev->helper.dev; 169 struct cirrus_device *cdev = gfbdev->helper.dev->dev_private; 170 struct fb_info *info; 171 struct drm_framebuffer *fb; 172 struct drm_mode_fb_cmd2 mode_cmd; 173 struct device *device = &dev->pdev->dev; 174 void *sysram; 175 struct drm_gem_object *gobj = NULL; 176 struct cirrus_bo *bo = NULL; 177 int size, ret; 178 179 mode_cmd.width = sizes->surface_width; 180 mode_cmd.height = sizes->surface_height; 181 mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8); 182 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 183 sizes->surface_depth); 184 size = mode_cmd.pitches[0] * mode_cmd.height; 185 186 ret = cirrusfb_create_object(gfbdev, &mode_cmd, &gobj); 187 if (ret) { 188 DRM_ERROR("failed to create fbcon backing object %d\n", ret); 189 return ret; 190 } 191 192 bo = gem_to_cirrus_bo(gobj); 193 194 sysram = vmalloc(size); 195 if (!sysram) 196 return -ENOMEM; 197 198 info = framebuffer_alloc(0, device); 199 if (info == NULL) 200 return -ENOMEM; 201 202 info->par = gfbdev; 203 204 ret = cirrus_framebuffer_init(cdev->dev, &gfbdev->gfb, &mode_cmd, gobj); 205 if (ret) 206 return ret; 207 208 gfbdev->sysram = sysram; 209 gfbdev->size = size; 210 211 fb = &gfbdev->gfb.base; 212 if (!fb) { 213 DRM_INFO("fb is NULL\n"); 214 return -EINVAL; 215 } 216 217 /* setup helper */ 218 gfbdev->helper.fb = fb; 219 gfbdev->helper.fbdev = info; 220 221 strcpy(info->fix.id, "cirrusdrmfb"); 222 223 224 info->flags = FBINFO_DEFAULT; 225 info->fbops = &cirrusfb_ops; 226 227 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); 228 drm_fb_helper_fill_var(info, &gfbdev->helper, sizes->fb_width, 229 sizes->fb_height); 230 231 /* setup aperture base/size for vesafb takeover */ 232 info->apertures = alloc_apertures(1); 233 if (!info->apertures) { 234 ret = -ENOMEM; 235 goto out_iounmap; 236 } 237 info->apertures->ranges[0].base = cdev->dev->mode_config.fb_base; 238 info->apertures->ranges[0].size = cdev->mc.vram_size; 239 240 info->fix.smem_start = cdev->dev->mode_config.fb_base; 241 info->fix.smem_len = cdev->mc.vram_size; 242 243 info->screen_base = sysram; 244 info->screen_size = size; 245 246 info->fix.mmio_start = 0; 247 info->fix.mmio_len = 0; 248 249 ret = fb_alloc_cmap(&info->cmap, 256, 0); 250 if (ret) { 251 DRM_ERROR("%s: can't allocate color map\n", info->fix.id); 252 ret = -ENOMEM; 253 goto out_iounmap; 254 } 255 256 DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start); 257 DRM_INFO("vram aper at 0x%lX\n", (unsigned long)info->fix.smem_start); 258 DRM_INFO("size %lu\n", (unsigned long)info->fix.smem_len); 259 DRM_INFO("fb depth is %d\n", fb->depth); 260 DRM_INFO(" pitch is %d\n", fb->pitches[0]); 261 262 return 0; 263out_iounmap: 264 return ret; 265} 266 267static int cirrus_fbdev_destroy(struct drm_device *dev, 268 struct cirrus_fbdev *gfbdev) 269{ 270 struct fb_info *info; 271 struct cirrus_framebuffer *gfb = &gfbdev->gfb; 272 273 if (gfbdev->helper.fbdev) { 274 info = gfbdev->helper.fbdev; 275 276 unregister_framebuffer(info); 277 if (info->cmap.len) 278 fb_dealloc_cmap(&info->cmap); 279 framebuffer_release(info); 280 } 281 282 if (gfb->obj) { 283 drm_gem_object_unreference_unlocked(gfb->obj); 284 gfb->obj = NULL; 285 } 286 287 vfree(gfbdev->sysram); 288 drm_fb_helper_fini(&gfbdev->helper); 289 drm_framebuffer_unregister_private(&gfb->base); 290 drm_framebuffer_cleanup(&gfb->base); 291 292 return 0; 293} 294 295static const struct drm_fb_helper_funcs cirrus_fb_helper_funcs = { 296 .gamma_set = cirrus_crtc_fb_gamma_set, 297 .gamma_get = cirrus_crtc_fb_gamma_get, 298 .fb_probe = cirrusfb_create, 299}; 300 301int cirrus_fbdev_init(struct cirrus_device *cdev) 302{ 303 struct cirrus_fbdev *gfbdev; 304 int ret; 305 int bpp_sel = 24; 306 307 /*bpp_sel = 8;*/ 308 gfbdev = kzalloc(sizeof(struct cirrus_fbdev), GFP_KERNEL); 309 if (!gfbdev) 310 return -ENOMEM; 311 312 cdev->mode_info.gfbdev = gfbdev; 313 spin_lock_init(&gfbdev->dirty_lock); 314 315 drm_fb_helper_prepare(cdev->dev, &gfbdev->helper, 316 &cirrus_fb_helper_funcs); 317 318 ret = drm_fb_helper_init(cdev->dev, &gfbdev->helper, 319 cdev->num_crtc, CIRRUSFB_CONN_LIMIT); 320 if (ret) 321 return ret; 322 323 ret = drm_fb_helper_single_add_all_connectors(&gfbdev->helper); 324 if (ret) 325 return ret; 326 327 /* disable all the possible outputs/crtcs before entering KMS mode */ 328 drm_helper_disable_unused_functions(cdev->dev); 329 330 return drm_fb_helper_initial_config(&gfbdev->helper, bpp_sel); 331} 332 333void cirrus_fbdev_fini(struct cirrus_device *cdev) 334{ 335 if (!cdev->mode_info.gfbdev) 336 return; 337 338 cirrus_fbdev_destroy(cdev->dev, cdev->mode_info.gfbdev); 339 kfree(cdev->mode_info.gfbdev); 340 cdev->mode_info.gfbdev = NULL; 341} 342