drivers/gpu/drm/qxl/qxl_fb.c

   1 /*
   2  * Copyright © 2013 Red Hat
   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 #include <linux/module.h>
  27
  28 #include "drmP.h"
  29 #include "drm/drm.h"
  30 #include "drm/drm_crtc.h"
  31 #include "drm/drm_crtc_helper.h"
  32 #include "qxl_drv.h"
  33
  34 #include "qxl_object.h"
  35 #include "drm_fb_helper.h"
  36
  37 #define QXL_DIRTY_DELAY (HZ / 30)
  38
  39 struct qxl_fbdev {
  40         struct drm_fb_helper helper;
  41         struct qxl_framebuffer  qfb;
  42         struct qxl_device       *qdev;
  43
  44         spinlock_t delayed_ops_lock;
  45         struct list_head delayed_ops;
  46         void *shadow;
  47         int size;
  48 };
  49
  50 static void qxl_fb_image_init(struct qxl_fb_image *qxl_fb_image,
  51                               struct qxl_device *qdev, struct fb_info *info,
  52                               const struct fb_image *image)
  53 {
  54         qxl_fb_image->qdev = qdev;
  55         if (info) {
  56                 qxl_fb_image->visual = info->fix.visual;
  57                 if (qxl_fb_image->visual == FB_VISUAL_TRUECOLOR ||
  58                     qxl_fb_image->visual == FB_VISUAL_DIRECTCOLOR)
  59                         memcpy(&qxl_fb_image->pseudo_palette,
  60                                info->pseudo_palette,
  61                                sizeof(qxl_fb_image->pseudo_palette));
  62         } else {
  63                  /* fallback */
  64                 if (image->depth == 1)
  65                         qxl_fb_image->visual = FB_VISUAL_MONO10;
  66                 else
  67                         qxl_fb_image->visual = FB_VISUAL_DIRECTCOLOR;
  68         }
  69         if (image) {
  70                 memcpy(&qxl_fb_image->fb_image, image,
  71                        sizeof(qxl_fb_image->fb_image));
  72         }
  73 }
  74
  75 #ifdef CONFIG_DRM_FBDEV_EMULATION
  76 static struct fb_deferred_io qxl_defio = {
  77         .delay          = QXL_DIRTY_DELAY,
  78         .deferred_io    = drm_fb_helper_deferred_io,
  79 };
  80 #endif
  81
  82 static struct fb_ops qxlfb_ops = {
  83         .owner = THIS_MODULE,
  84         DRM_FB_HELPER_DEFAULT_OPS,
  85         .fb_fillrect = drm_fb_helper_sys_fillrect,
  86         .fb_copyarea = drm_fb_helper_sys_copyarea,
  87         .fb_imageblit = drm_fb_helper_sys_imageblit,
  88 };
  89
  90 static void qxlfb_destroy_pinned_object(struct drm_gem_object *gobj)
  91 {
  92         struct qxl_bo *qbo = gem_to_qxl_bo(gobj);
  93         int ret;
  94
  95         ret = qxl_bo_reserve(qbo, false);
  96         if (likely(ret == 0)) {
  97                 qxl_bo_kunmap(qbo);
  98                 qxl_bo_unpin(qbo);
  99                 qxl_bo_unreserve(qbo);
 100         }
 101         drm_gem_object_unreference_unlocked(gobj);
 102 }
 103
 104 int qxl_get_handle_for_primary_fb(struct qxl_device *qdev,
 105                                   struct drm_file *file_priv,
 106                                   uint32_t *handle)
 107 {
 108         int r;
 109         struct drm_gem_object *gobj = qdev->fbdev_qfb->obj;
 110
 111         BUG_ON(!gobj);
 112         /* drm_get_handle_create adds a reference - good */
 113         r = drm_gem_handle_create(file_priv, gobj, handle);
 114         if (r)
 115                 return r;
 116         return 0;
 117 }
 118
 119 static int qxlfb_create_pinned_object(struct qxl_fbdev *qfbdev,
 120                                       const struct drm_mode_fb_cmd2 *mode_cmd,
 121                                       struct drm_gem_object **gobj_p)
 122 {
 123         struct qxl_device *qdev = qfbdev->qdev;
 124         struct drm_gem_object *gobj = NULL;
 125         struct qxl_bo *qbo = NULL;
 126         int ret;
 127         int aligned_size, size;
 128         int height = mode_cmd->height;
 129
 130         size = mode_cmd->pitches[0] * height;
 131         aligned_size = ALIGN(size, PAGE_SIZE);
 132         /* TODO: unallocate and reallocate surface0 for real. Hack to just
 133          * have a large enough surface0 for 1024x768 Xorg 32bpp mode */
 134         ret = qxl_gem_object_create(qdev, aligned_size, 0,
 135                                     QXL_GEM_DOMAIN_SURFACE,
 136                                     false, /* is discardable */
 137                                     false, /* is kernel (false means device) */
 138                                     NULL,
 139                                     &gobj);
 140         if (ret) {
 141                 pr_err("failed to allocate framebuffer (%d)\n",
 142                        aligned_size);
 143                 return -ENOMEM;
 144         }
 145         qbo = gem_to_qxl_bo(gobj);
 146
 147         qbo->surf.width = mode_cmd->width;
 148         qbo->surf.height = mode_cmd->height;
 149         qbo->surf.stride = mode_cmd->pitches[0];
 150         qbo->surf.format = SPICE_SURFACE_FMT_32_xRGB;
 151         ret = qxl_bo_reserve(qbo, false);
 152         if (unlikely(ret != 0))
 153                 goto out_unref;
 154         ret = qxl_bo_pin(qbo, QXL_GEM_DOMAIN_SURFACE, NULL);
 155         if (ret) {
 156                 qxl_bo_unreserve(qbo);
 157                 goto out_unref;
 158         }
 159         ret = qxl_bo_kmap(qbo, NULL);
 160         qxl_bo_unreserve(qbo); /* unreserve, will be mmaped */
 161         if (ret)
 162                 goto out_unref;
 163
 164         *gobj_p = gobj;
 165         return 0;
 166 out_unref:
 167         qxlfb_destroy_pinned_object(gobj);
 168         *gobj_p = NULL;
 169         return ret;
 170 }
 171
 172 /*
 173  * FIXME
 174  * It should not be necessary to have a special dirty() callback for fbdev.
 175  */
 176 static int qxlfb_framebuffer_dirty(struct drm_framebuffer *fb,
 177                                    struct drm_file *file_priv,
 178                                    unsigned flags, unsigned color,
 179                                    struct drm_clip_rect *clips,
 180                                    unsigned num_clips)
 181 {
 182         struct qxl_device *qdev = fb->dev->dev_private;
 183         struct fb_info *info = qdev->fbdev_info;
 184         struct qxl_fbdev *qfbdev = info->par;
 185         struct qxl_fb_image qxl_fb_image;
 186         struct fb_image *image = &qxl_fb_image.fb_image;
 187
 188         /* TODO: hard coding 32 bpp */
 189         int stride = qfbdev->qfb.base.pitches[0];
 190
 191         /*
 192          * we are using a shadow draw buffer, at qdev->surface0_shadow
 193          */
 194         qxl_io_log(qdev, "dirty x[%d, %d], y[%d, %d]\n", clips->x1, clips->x2,
 195                    clips->y1, clips->y2);
 196         image->dx = clips->x1;
 197         image->dy = clips->y1;
 198         image->width = clips->x2 - clips->x1;
 199         image->height = clips->y2 - clips->y1;
 200         image->fg_color = 0xffffffff; /* unused, just to avoid uninitialized
 201                                          warnings */
 202         image->bg_color = 0;
 203         image->depth = 32;           /* TODO: take from somewhere? */
 204         image->cmap.start = 0;
 205         image->cmap.len = 0;
 206         image->cmap.red = NULL;
 207         image->cmap.green = NULL;
 208         image->cmap.blue = NULL;
 209         image->cmap.transp = NULL;
 210         image->data = qfbdev->shadow + (clips->x1 * 4) + (stride * clips->y1);
 211
 212         qxl_fb_image_init(&qxl_fb_image, qdev, info, NULL);
 213         qxl_draw_opaque_fb(&qxl_fb_image, stride);
 214
 215         return 0;
 216 }
 217
 218 static const struct drm_framebuffer_funcs qxlfb_fb_funcs = {
 219         .destroy = qxl_user_framebuffer_destroy,
 220         .dirty = qxlfb_framebuffer_dirty,
 221 };
 222
 223 static int qxlfb_create(struct qxl_fbdev *qfbdev,
 224                         struct drm_fb_helper_surface_size *sizes)
 225 {
 226         struct qxl_device *qdev = qfbdev->qdev;
 227         struct fb_info *info;
 228         struct drm_framebuffer *fb = NULL;
 229         struct drm_mode_fb_cmd2 mode_cmd;
 230         struct drm_gem_object *gobj = NULL;
 231         struct qxl_bo *qbo = NULL;
 232         int ret;
 233         int size;
 234         int bpp = sizes->surface_bpp;
 235         int depth = sizes->surface_depth;
 236         void *shadow;
 237
 238         mode_cmd.width = sizes->surface_width;
 239         mode_cmd.height = sizes->surface_height;
 240
 241         mode_cmd.pitches[0] = ALIGN(mode_cmd.width * ((bpp + 1) / 8), 64);
 242         mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
 243
 244         ret = qxlfb_create_pinned_object(qfbdev, &mode_cmd, &gobj);
 245         if (ret < 0)
 246                 return ret;
 247
 248         qbo = gem_to_qxl_bo(gobj);
 249         QXL_INFO(qdev, "%s: %dx%d %d\n", __func__, mode_cmd.width,
 250                  mode_cmd.height, mode_cmd.pitches[0]);
 251
 252         shadow = vmalloc(mode_cmd.pitches[0] * mode_cmd.height);
 253         /* TODO: what's the usual response to memory allocation errors? */
 254         BUG_ON(!shadow);
 255         QXL_INFO(qdev,
 256         "surface0 at gpu offset %lld, mmap_offset %lld (virt %p, shadow %p)\n",
 257                  qxl_bo_gpu_offset(qbo),
 258                  qxl_bo_mmap_offset(qbo),
 259                  qbo->kptr,
 260                  shadow);
 261         size = mode_cmd.pitches[0] * mode_cmd.height;
 262
 263         info = drm_fb_helper_alloc_fbi(&qfbdev->helper);
 264         if (IS_ERR(info)) {
 265                 ret = PTR_ERR(info);
 266                 goto out_unref;
 267         }
 268
 269         info->par = qfbdev;
 270
 271         qxl_framebuffer_init(qdev->ddev, &qfbdev->qfb, &mode_cmd, gobj,
 272                              &qxlfb_fb_funcs);
 273
 274         fb = &qfbdev->qfb.base;
 275
 276         /* setup helper with fb data */
 277         qfbdev->helper.fb = fb;
 278
 279         qfbdev->shadow = shadow;
 280         strcpy(info->fix.id, "qxldrmfb");
 281
 282         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 283
 284         info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT;
 285         info->fbops = &qxlfb_ops;
 286
 287         /*
 288          * TODO: using gobj->size in various places in this function. Not sure
 289          * what the difference between the different sizes is.
 290          */
 291         info->fix.smem_start = qdev->vram_base; /* TODO - correct? */
 292         info->fix.smem_len = gobj->size;
 293         info->screen_base = qfbdev->shadow;
 294         info->screen_size = gobj->size;
 295
 296         drm_fb_helper_fill_var(info, &qfbdev->helper, sizes->fb_width,
 297                                sizes->fb_height);
 298
 299         /* setup aperture base/size for vesafb takeover */
 300         info->apertures->ranges[0].base = qdev->ddev->mode_config.fb_base;
 301         info->apertures->ranges[0].size = qdev->vram_size;
 302
 303         info->fix.mmio_start = 0;
 304         info->fix.mmio_len = 0;
 305
 306         if (info->screen_base == NULL) {
 307                 ret = -ENOSPC;
 308                 goto out_destroy_fbi;
 309         }
 310
 311 #ifdef CONFIG_DRM_FBDEV_EMULATION
 312         info->fbdefio = &qxl_defio;
 313         fb_deferred_io_init(info);
 314 #endif
 315
 316         qdev->fbdev_info = info;
 317         qdev->fbdev_qfb = &qfbdev->qfb;
 318         DRM_INFO("fb mappable at 0x%lX, size %lu\n",  info->fix.smem_start, (unsigned long)info->screen_size);
 319         DRM_INFO("fb: depth %d, pitch %d, width %d, height %d\n", fb->depth, fb->pitches[0], fb->width, fb->height);
 320         return 0;
 321
 322 out_destroy_fbi:
 323         drm_fb_helper_release_fbi(&qfbdev->helper);
 324 out_unref:
 325         if (qbo) {
 326                 ret = qxl_bo_reserve(qbo, false);
 327                 if (likely(ret == 0)) {
 328                         qxl_bo_kunmap(qbo);
 329                         qxl_bo_unpin(qbo);
 330                         qxl_bo_unreserve(qbo);
 331                 }
 332         }
 333         if (fb && ret) {
 334                 drm_gem_object_unreference_unlocked(gobj);
 335                 drm_framebuffer_cleanup(fb);
 336                 kfree(fb);
 337         }
 338         drm_gem_object_unreference_unlocked(gobj);
 339         return ret;
 340 }
 341
 342 static int qxl_fb_find_or_create_single(
 343                 struct drm_fb_helper *helper,
 344                 struct drm_fb_helper_surface_size *sizes)
 345 {
 346         struct qxl_fbdev *qfbdev =
 347                 container_of(helper, struct qxl_fbdev, helper);
 348         int new_fb = 0;
 349         int ret;
 350
 351         if (!helper->fb) {
 352                 ret = qxlfb_create(qfbdev, sizes);
 353                 if (ret)
 354                         return ret;
 355                 new_fb = 1;
 356         }
 357         return new_fb;
 358 }
 359
 360 static int qxl_fbdev_destroy(struct drm_device *dev, struct qxl_fbdev *qfbdev)
 361 {
 362         struct qxl_framebuffer *qfb = &qfbdev->qfb;
 363
 364         drm_fb_helper_unregister_fbi(&qfbdev->helper);
 365         drm_fb_helper_release_fbi(&qfbdev->helper);
 366
 367         if (qfb->obj) {
 368                 qxlfb_destroy_pinned_object(qfb->obj);
 369                 qfb->obj = NULL;
 370         }
 371         drm_fb_helper_fini(&qfbdev->helper);
 372         vfree(qfbdev->shadow);
 373         drm_framebuffer_cleanup(&qfb->base);
 374
 375         return 0;
 376 }
 377
 378 static const struct drm_fb_helper_funcs qxl_fb_helper_funcs = {
 379         .fb_probe = qxl_fb_find_or_create_single,
 380 };
 381
 382 int qxl_fbdev_init(struct qxl_device *qdev)
 383 {
 384         struct qxl_fbdev *qfbdev;
 385         int bpp_sel = 32; /* TODO: parameter from somewhere? */
 386         int ret;
 387
 388         qfbdev = kzalloc(sizeof(struct qxl_fbdev), GFP_KERNEL);
 389         if (!qfbdev)
 390                 return -ENOMEM;
 391
 392         qfbdev->qdev = qdev;
 393         qdev->mode_info.qfbdev = qfbdev;
 394         spin_lock_init(&qfbdev->delayed_ops_lock);
 395         INIT_LIST_HEAD(&qfbdev->delayed_ops);
 396
 397         drm_fb_helper_prepare(qdev->ddev, &qfbdev->helper,
 398                               &qxl_fb_helper_funcs);
 399
 400         ret = drm_fb_helper_init(qdev->ddev, &qfbdev->helper,
 401                                  qxl_num_crtc /* num_crtc - QXL supports just 1 */,
 402                                  QXLFB_CONN_LIMIT);
 403         if (ret)
 404                 goto free;
 405
 406         ret = drm_fb_helper_single_add_all_connectors(&qfbdev->helper);
 407         if (ret)
 408                 goto fini;
 409
 410         ret = drm_fb_helper_initial_config(&qfbdev->helper, bpp_sel);
 411         if (ret)
 412                 goto fini;
 413
 414         return 0;
 415
 416 fini:
 417         drm_fb_helper_fini(&qfbdev->helper);
 418 free:
 419         kfree(qfbdev);
 420         return ret;
 421 }
 422
 423 void qxl_fbdev_fini(struct qxl_device *qdev)
 424 {
 425         if (!qdev->mode_info.qfbdev)
 426                 return;
 427
 428         qxl_fbdev_destroy(qdev->ddev, qdev->mode_info.qfbdev);
 429         kfree(qdev->mode_info.qfbdev);
 430         qdev->mode_info.qfbdev = NULL;
 431 }
 432
 433 void qxl_fbdev_set_suspend(struct qxl_device *qdev, int state)
 434 {
 435         drm_fb_helper_set_suspend(&qdev->mode_info.qfbdev->helper, state);
 436 }
 437
 438 bool qxl_fbdev_qobj_is_fb(struct qxl_device *qdev, struct qxl_bo *qobj)
 439 {
 440         if (qobj == gem_to_qxl_bo(qdev->mode_info.qfbdev->qfb.obj))
 441                 return true;
 442         return false;
 443 }