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         .fb_check_var = drm_fb_helper_check_var,
  85         .fb_set_par = drm_fb_helper_set_par, /* TODO: copy vmwgfx */
  86         .fb_fillrect = drm_fb_helper_sys_fillrect,
  87         .fb_copyarea = drm_fb_helper_sys_copyarea,
  88         .fb_imageblit = drm_fb_helper_sys_imageblit,
  89         .fb_pan_display = drm_fb_helper_pan_display,
  90         .fb_blank = drm_fb_helper_blank,
  91         .fb_setcmap = drm_fb_helper_setcmap,
  92         .fb_debug_enter = drm_fb_helper_debug_enter,
  93         .fb_debug_leave = drm_fb_helper_debug_leave,
  94 };
  95
  96 static void qxlfb_destroy_pinned_object(struct drm_gem_object *gobj)
  97 {
  98         struct qxl_bo *qbo = gem_to_qxl_bo(gobj);
  99         int ret;
 100
 101         ret = qxl_bo_reserve(qbo, false);
 102         if (likely(ret == 0)) {
 103                 qxl_bo_kunmap(qbo);
 104                 qxl_bo_unpin(qbo);
 105                 qxl_bo_unreserve(qbo);
 106         }
 107         drm_gem_object_unreference_unlocked(gobj);
 108 }
 109
 110 int qxl_get_handle_for_primary_fb(struct qxl_device *qdev,
 111                                   struct drm_file *file_priv,
 112                                   uint32_t *handle)
 113 {
 114         int r;
 115         struct drm_gem_object *gobj = qdev->fbdev_qfb->obj;
 116
 117         BUG_ON(!gobj);
 118         /* drm_get_handle_create adds a reference - good */
 119         r = drm_gem_handle_create(file_priv, gobj, handle);
 120         if (r)
 121                 return r;
 122         return 0;
 123 }
 124
 125 static int qxlfb_create_pinned_object(struct qxl_fbdev *qfbdev,
 126                                       const struct drm_mode_fb_cmd2 *mode_cmd,
 127                                       struct drm_gem_object **gobj_p)
 128 {
 129         struct qxl_device *qdev = qfbdev->qdev;
 130         struct drm_gem_object *gobj = NULL;
 131         struct qxl_bo *qbo = NULL;
 132         int ret;
 133         int aligned_size, size;
 134         int height = mode_cmd->height;
 135
 136         size = mode_cmd->pitches[0] * height;
 137         aligned_size = ALIGN(size, PAGE_SIZE);
 138         /* TODO: unallocate and reallocate surface0 for real. Hack to just
 139          * have a large enough surface0 for 1024x768 Xorg 32bpp mode */
 140         ret = qxl_gem_object_create(qdev, aligned_size, 0,
 141                                     QXL_GEM_DOMAIN_SURFACE,
 142                                     false, /* is discardable */
 143                                     false, /* is kernel (false means device) */
 144                                     NULL,
 145                                     &gobj);
 146         if (ret) {
 147                 pr_err("failed to allocate framebuffer (%d)\n",
 148                        aligned_size);
 149                 return -ENOMEM;
 150         }
 151         qbo = gem_to_qxl_bo(gobj);
 152
 153         qbo->surf.width = mode_cmd->width;
 154         qbo->surf.height = mode_cmd->height;
 155         qbo->surf.stride = mode_cmd->pitches[0];
 156         qbo->surf.format = SPICE_SURFACE_FMT_32_xRGB;
 157         ret = qxl_bo_reserve(qbo, false);
 158         if (unlikely(ret != 0))
 159                 goto out_unref;
 160         ret = qxl_bo_pin(qbo, QXL_GEM_DOMAIN_SURFACE, NULL);
 161         if (ret) {
 162                 qxl_bo_unreserve(qbo);
 163                 goto out_unref;
 164         }
 165         ret = qxl_bo_kmap(qbo, NULL);
 166         qxl_bo_unreserve(qbo); /* unreserve, will be mmaped */
 167         if (ret)
 168                 goto out_unref;
 169
 170         *gobj_p = gobj;
 171         return 0;
 172 out_unref:
 173         qxlfb_destroy_pinned_object(gobj);
 174         *gobj_p = NULL;
 175         return ret;
 176 }
 177
 178 /*
 179  * FIXME
 180  * It should not be necessary to have a special dirty() callback for fbdev.
 181  */
 182 static int qxlfb_framebuffer_dirty(struct drm_framebuffer *fb,
 183                                    struct drm_file *file_priv,
 184                                    unsigned flags, unsigned color,
 185                                    struct drm_clip_rect *clips,
 186                                    unsigned num_clips)
 187 {
 188         struct qxl_device *qdev = fb->dev->dev_private;
 189         struct fb_info *info = qdev->fbdev_info;
 190         struct qxl_fbdev *qfbdev = info->par;
 191         struct qxl_fb_image qxl_fb_image;
 192         struct fb_image *image = &qxl_fb_image.fb_image;
 193
 194         /* TODO: hard coding 32 bpp */
 195         int stride = qfbdev->qfb.base.pitches[0];
 196
 197         /*
 198          * we are using a shadow draw buffer, at qdev->surface0_shadow
 199          */
 200         qxl_io_log(qdev, "dirty x[%d, %d], y[%d, %d]", clips->x1, clips->x2,
 201                    clips->y1, clips->y2);
 202         image->dx = clips->x1;
 203         image->dy = clips->y1;
 204         image->width = clips->x2 - clips->x1;
 205         image->height = clips->y2 - clips->y1;
 206         image->fg_color = 0xffffffff; /* unused, just to avoid uninitialized
 207                                          warnings */
 208         image->bg_color = 0;
 209         image->depth = 32;           /* TODO: take from somewhere? */
 210         image->cmap.start = 0;
 211         image->cmap.len = 0;
 212         image->cmap.red = NULL;
 213         image->cmap.green = NULL;
 214         image->cmap.blue = NULL;
 215         image->cmap.transp = NULL;
 216         image->data = qfbdev->shadow + (clips->x1 * 4) + (stride * clips->y1);
 217
 218         qxl_fb_image_init(&qxl_fb_image, qdev, info, NULL);
 219         qxl_draw_opaque_fb(&qxl_fb_image, stride);
 220
 221         return 0;
 222 }
 223
 224 static const struct drm_framebuffer_funcs qxlfb_fb_funcs = {
 225         .destroy = qxl_user_framebuffer_destroy,
 226         .dirty = qxlfb_framebuffer_dirty,
 227 };
 228
 229 static int qxlfb_create(struct qxl_fbdev *qfbdev,
 230                         struct drm_fb_helper_surface_size *sizes)
 231 {
 232         struct qxl_device *qdev = qfbdev->qdev;
 233         struct fb_info *info;
 234         struct drm_framebuffer *fb = NULL;
 235         struct drm_mode_fb_cmd2 mode_cmd;
 236         struct drm_gem_object *gobj = NULL;
 237         struct qxl_bo *qbo = NULL;
 238         int ret;
 239         int size;
 240         int bpp = sizes->surface_bpp;
 241         int depth = sizes->surface_depth;
 242         void *shadow;
 243
 244         mode_cmd.width = sizes->surface_width;
 245         mode_cmd.height = sizes->surface_height;
 246
 247         mode_cmd.pitches[0] = ALIGN(mode_cmd.width * ((bpp + 1) / 8), 64);
 248         mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
 249
 250         ret = qxlfb_create_pinned_object(qfbdev, &mode_cmd, &gobj);
 251         if (ret < 0)
 252                 return ret;
 253
 254         qbo = gem_to_qxl_bo(gobj);
 255         QXL_INFO(qdev, "%s: %dx%d %d\n", __func__, mode_cmd.width,
 256                  mode_cmd.height, mode_cmd.pitches[0]);
 257
 258         shadow = vmalloc(mode_cmd.pitches[0] * mode_cmd.height);
 259         /* TODO: what's the usual response to memory allocation errors? */
 260         BUG_ON(!shadow);
 261         QXL_INFO(qdev,
 262         "surface0 at gpu offset %lld, mmap_offset %lld (virt %p, shadow %p)\n",
 263                  qxl_bo_gpu_offset(qbo),
 264                  qxl_bo_mmap_offset(qbo),
 265                  qbo->kptr,
 266                  shadow);
 267         size = mode_cmd.pitches[0] * mode_cmd.height;
 268
 269         info = drm_fb_helper_alloc_fbi(&qfbdev->helper);
 270         if (IS_ERR(info)) {
 271                 ret = PTR_ERR(info);
 272                 goto out_unref;
 273         }
 274
 275         info->par = qfbdev;
 276
 277         qxl_framebuffer_init(qdev->ddev, &qfbdev->qfb, &mode_cmd, gobj,
 278                              &qxlfb_fb_funcs);
 279
 280         fb = &qfbdev->qfb.base;
 281
 282         /* setup helper with fb data */
 283         qfbdev->helper.fb = fb;
 284
 285         qfbdev->shadow = shadow;
 286         strcpy(info->fix.id, "qxldrmfb");
 287
 288         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 289
 290         info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT;
 291         info->fbops = &qxlfb_ops;
 292
 293         /*
 294          * TODO: using gobj->size in various places in this function. Not sure
 295          * what the difference between the different sizes is.
 296          */
 297         info->fix.smem_start = qdev->vram_base; /* TODO - correct? */
 298         info->fix.smem_len = gobj->size;
 299         info->screen_base = qfbdev->shadow;
 300         info->screen_size = gobj->size;
 301
 302         drm_fb_helper_fill_var(info, &qfbdev->helper, sizes->fb_width,
 303                                sizes->fb_height);
 304
 305         /* setup aperture base/size for vesafb takeover */
 306         info->apertures->ranges[0].base = qdev->ddev->mode_config.fb_base;
 307         info->apertures->ranges[0].size = qdev->vram_size;
 308
 309         info->fix.mmio_start = 0;
 310         info->fix.mmio_len = 0;
 311
 312         if (info->screen_base == NULL) {
 313                 ret = -ENOSPC;
 314                 goto out_destroy_fbi;
 315         }
 316
 317 #ifdef CONFIG_DRM_FBDEV_EMULATION
 318         info->fbdefio = &qxl_defio;
 319         fb_deferred_io_init(info);
 320 #endif
 321
 322         qdev->fbdev_info = info;
 323         qdev->fbdev_qfb = &qfbdev->qfb;
 324         DRM_INFO("fb mappable at 0x%lX, size %lu\n",  info->fix.smem_start, (unsigned long)info->screen_size);
 325         DRM_INFO("fb: depth %d, pitch %d, width %d, height %d\n", fb->depth, fb->pitches[0], fb->width, fb->height);
 326         return 0;
 327
 328 out_destroy_fbi:
 329         drm_fb_helper_release_fbi(&qfbdev->helper);
 330 out_unref:
 331         if (qbo) {
 332                 ret = qxl_bo_reserve(qbo, false);
 333                 if (likely(ret == 0)) {
 334                         qxl_bo_kunmap(qbo);
 335                         qxl_bo_unpin(qbo);
 336                         qxl_bo_unreserve(qbo);
 337                 }
 338         }
 339         if (fb && ret) {
 340                 drm_gem_object_unreference_unlocked(gobj);
 341                 drm_framebuffer_cleanup(fb);
 342                 kfree(fb);
 343         }
 344         drm_gem_object_unreference_unlocked(gobj);
 345         return ret;
 346 }
 347
 348 static int qxl_fb_find_or_create_single(
 349                 struct drm_fb_helper *helper,
 350                 struct drm_fb_helper_surface_size *sizes)
 351 {
 352         struct qxl_fbdev *qfbdev =
 353                 container_of(helper, struct qxl_fbdev, helper);
 354         int new_fb = 0;
 355         int ret;
 356
 357         if (!helper->fb) {
 358                 ret = qxlfb_create(qfbdev, sizes);
 359                 if (ret)
 360                         return ret;
 361                 new_fb = 1;
 362         }
 363         return new_fb;
 364 }
 365
 366 static int qxl_fbdev_destroy(struct drm_device *dev, struct qxl_fbdev *qfbdev)
 367 {
 368         struct qxl_framebuffer *qfb = &qfbdev->qfb;
 369
 370         drm_fb_helper_unregister_fbi(&qfbdev->helper);
 371         drm_fb_helper_release_fbi(&qfbdev->helper);
 372
 373         if (qfb->obj) {
 374                 qxlfb_destroy_pinned_object(qfb->obj);
 375                 qfb->obj = NULL;
 376         }
 377         drm_fb_helper_fini(&qfbdev->helper);
 378         vfree(qfbdev->shadow);
 379         drm_framebuffer_cleanup(&qfb->base);
 380
 381         return 0;
 382 }
 383
 384 static const struct drm_fb_helper_funcs qxl_fb_helper_funcs = {
 385         .fb_probe = qxl_fb_find_or_create_single,
 386 };
 387
 388 int qxl_fbdev_init(struct qxl_device *qdev)
 389 {
 390         struct qxl_fbdev *qfbdev;
 391         int bpp_sel = 32; /* TODO: parameter from somewhere? */
 392         int ret;
 393
 394         qfbdev = kzalloc(sizeof(struct qxl_fbdev), GFP_KERNEL);
 395         if (!qfbdev)
 396                 return -ENOMEM;
 397
 398         qfbdev->qdev = qdev;
 399         qdev->mode_info.qfbdev = qfbdev;
 400         spin_lock_init(&qfbdev->delayed_ops_lock);
 401         INIT_LIST_HEAD(&qfbdev->delayed_ops);
 402
 403         drm_fb_helper_prepare(qdev->ddev, &qfbdev->helper,
 404                               &qxl_fb_helper_funcs);
 405
 406         ret = drm_fb_helper_init(qdev->ddev, &qfbdev->helper,
 407                                  qxl_num_crtc /* num_crtc - QXL supports just 1 */,
 408                                  QXLFB_CONN_LIMIT);
 409         if (ret)
 410                 goto free;
 411
 412         ret = drm_fb_helper_single_add_all_connectors(&qfbdev->helper);
 413         if (ret)
 414                 goto fini;
 415
 416         ret = drm_fb_helper_initial_config(&qfbdev->helper, bpp_sel);
 417         if (ret)
 418                 goto fini;
 419
 420         return 0;
 421
 422 fini:
 423         drm_fb_helper_fini(&qfbdev->helper);
 424 free:
 425         kfree(qfbdev);
 426         return ret;
 427 }
 428
 429 void qxl_fbdev_fini(struct qxl_device *qdev)
 430 {
 431         if (!qdev->mode_info.qfbdev)
 432                 return;
 433
 434         qxl_fbdev_destroy(qdev->ddev, qdev->mode_info.qfbdev);
 435         kfree(qdev->mode_info.qfbdev);
 436         qdev->mode_info.qfbdev = NULL;
 437 }
 438
 439 void qxl_fbdev_set_suspend(struct qxl_device *qdev, int state)
 440 {
 441         drm_fb_helper_set_suspend(&qdev->mode_info.qfbdev->helper, state);
 442 }
 443
 444 bool qxl_fbdev_qobj_is_fb(struct qxl_device *qdev, struct qxl_bo *qobj)
 445 {
 446         if (qobj == gem_to_qxl_bo(qdev->mode_info.qfbdev->qfb.obj))
 447                 return true;
 448         return false;
 449 }