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 #include <linux/fb.h>
  28
  29 #include "drmP.h"
  30 #include "drm/drm.h"
  31 #include "drm/drm_crtc.h"
  32 #include "drm/drm_crtc_helper.h"
  33 #include "qxl_drv.h"
  34
  35 #include "qxl_object.h"
  36 #include "drm_fb_helper.h"
  37
  38 #define QXL_DIRTY_DELAY (HZ / 30)
  39
  40 struct qxl_fbdev {
  41         struct drm_fb_helper helper;
  42         struct qxl_framebuffer  qfb;
  43         struct qxl_device       *qdev;
  44
  45         spinlock_t delayed_ops_lock;
  46         struct list_head delayed_ops;
  47         void *shadow;
  48         int size;
  49 };
  50
  51 static void qxl_fb_image_init(struct qxl_fb_image *qxl_fb_image,
  52                               struct qxl_device *qdev, struct fb_info *info,
  53                               const struct fb_image *image)
  54 {
  55         qxl_fb_image->qdev = qdev;
  56         if (info) {
  57                 qxl_fb_image->visual = info->fix.visual;
  58                 if (qxl_fb_image->visual == FB_VISUAL_TRUECOLOR ||
  59                     qxl_fb_image->visual == FB_VISUAL_DIRECTCOLOR)
  60                         memcpy(&qxl_fb_image->pseudo_palette,
  61                                info->pseudo_palette,
  62                                sizeof(qxl_fb_image->pseudo_palette));
  63         } else {
  64                  /* fallback */
  65                 if (image->depth == 1)
  66                         qxl_fb_image->visual = FB_VISUAL_MONO10;
  67                 else
  68                         qxl_fb_image->visual = FB_VISUAL_DIRECTCOLOR;
  69         }
  70         if (image) {
  71                 memcpy(&qxl_fb_image->fb_image, image,
  72                        sizeof(qxl_fb_image->fb_image));
  73         }
  74 }
  75
  76 static struct fb_deferred_io qxl_defio = {
  77         .delay          = QXL_DIRTY_DELAY,
  78         .deferred_io    = drm_fb_helper_deferred_io,
  79 };
  80
  81 static struct fb_ops qxlfb_ops = {
  82         .owner = THIS_MODULE,
  83         .fb_check_var = drm_fb_helper_check_var,
  84         .fb_set_par = drm_fb_helper_set_par, /* TODO: copy vmwgfx */
  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         .fb_pan_display = drm_fb_helper_pan_display,
  89         .fb_blank = drm_fb_helper_blank,
  90         .fb_setcmap = drm_fb_helper_setcmap,
  91         .fb_debug_enter = drm_fb_helper_debug_enter,
  92         .fb_debug_leave = drm_fb_helper_debug_leave,
  93 };
  94
  95 static void qxlfb_destroy_pinned_object(struct drm_gem_object *gobj)
  96 {
  97         struct qxl_bo *qbo = gem_to_qxl_bo(gobj);
  98         int ret;
  99
 100         ret = qxl_bo_reserve(qbo, false);
 101         if (likely(ret == 0)) {
 102                 qxl_bo_kunmap(qbo);
 103                 qxl_bo_unpin(qbo);
 104                 qxl_bo_unreserve(qbo);
 105         }
 106         drm_gem_object_unreference_unlocked(gobj);
 107 }
 108
 109 int qxl_get_handle_for_primary_fb(struct qxl_device *qdev,
 110                                   struct drm_file *file_priv,
 111                                   uint32_t *handle)
 112 {
 113         int r;
 114         struct drm_gem_object *gobj = qdev->fbdev_qfb->obj;
 115
 116         BUG_ON(!gobj);
 117         /* drm_get_handle_create adds a reference - good */
 118         r = drm_gem_handle_create(file_priv, gobj, handle);
 119         if (r)
 120                 return r;
 121         return 0;
 122 }
 123
 124 static int qxlfb_create_pinned_object(struct qxl_fbdev *qfbdev,
 125                                       const struct drm_mode_fb_cmd2 *mode_cmd,
 126                                       struct drm_gem_object **gobj_p)
 127 {
 128         struct qxl_device *qdev = qfbdev->qdev;
 129         struct drm_gem_object *gobj = NULL;
 130         struct qxl_bo *qbo = NULL;
 131         int ret;
 132         int aligned_size, size;
 133         int height = mode_cmd->height;
 134         int bpp;
 135         int depth;
 136
 137         drm_fb_get_bpp_depth(mode_cmd->pixel_format, &bpp, &depth);
 138
 139         size = mode_cmd->pitches[0] * height;
 140         aligned_size = ALIGN(size, PAGE_SIZE);
 141         /* TODO: unallocate and reallocate surface0 for real. Hack to just
 142          * have a large enough surface0 for 1024x768 Xorg 32bpp mode */
 143         ret = qxl_gem_object_create(qdev, aligned_size, 0,
 144                                     QXL_GEM_DOMAIN_SURFACE,
 145                                     false, /* is discardable */
 146                                     false, /* is kernel (false means device) */
 147                                     NULL,
 148                                     &gobj);
 149         if (ret) {
 150                 pr_err("failed to allocate framebuffer (%d)\n",
 151                        aligned_size);
 152                 return -ENOMEM;
 153         }
 154         qbo = gem_to_qxl_bo(gobj);
 155
 156         qbo->surf.width = mode_cmd->width;
 157         qbo->surf.height = mode_cmd->height;
 158         qbo->surf.stride = mode_cmd->pitches[0];
 159         qbo->surf.format = SPICE_SURFACE_FMT_32_xRGB;
 160         ret = qxl_bo_reserve(qbo, false);
 161         if (unlikely(ret != 0))
 162                 goto out_unref;
 163         ret = qxl_bo_pin(qbo, QXL_GEM_DOMAIN_SURFACE, NULL);
 164         if (ret) {
 165                 qxl_bo_unreserve(qbo);
 166                 goto out_unref;
 167         }
 168         ret = qxl_bo_kmap(qbo, NULL);
 169         qxl_bo_unreserve(qbo); /* unreserve, will be mmaped */
 170         if (ret)
 171                 goto out_unref;
 172
 173         *gobj_p = gobj;
 174         return 0;
 175 out_unref:
 176         qxlfb_destroy_pinned_object(gobj);
 177         *gobj_p = NULL;
 178         return ret;
 179 }
 180
 181 /*
 182  * FIXME
 183  * It should not be necessary to have a special dirty() callback for fbdev.
 184  */
 185 static int qxlfb_framebuffer_dirty(struct drm_framebuffer *fb,
 186                                    struct drm_file *file_priv,
 187                                    unsigned flags, unsigned color,
 188                                    struct drm_clip_rect *clips,
 189                                    unsigned num_clips)
 190 {
 191         struct qxl_device *qdev = fb->dev->dev_private;
 192         struct fb_info *info = qdev->fbdev_info;
 193         struct qxl_fbdev *qfbdev = info->par;
 194         struct qxl_fb_image qxl_fb_image;
 195         struct fb_image *image = &qxl_fb_image.fb_image;
 196
 197         /* TODO: hard coding 32 bpp */
 198         int stride = qfbdev->qfb.base.pitches[0];
 199
 200         /*
 201          * we are using a shadow draw buffer, at qdev->surface0_shadow
 202          */
 203         qxl_io_log(qdev, "dirty x[%d, %d], y[%d, %d]", clips->x1, clips->x2,
 204                    clips->y1, clips->y2);
 205         image->dx = clips->x1;
 206         image->dy = clips->y1;
 207         image->width = clips->x2 - clips->x1;
 208         image->height = clips->y2 - clips->y1;
 209         image->fg_color = 0xffffffff; /* unused, just to avoid uninitialized
 210                                          warnings */
 211         image->bg_color = 0;
 212         image->depth = 32;           /* TODO: take from somewhere? */
 213         image->cmap.start = 0;
 214         image->cmap.len = 0;
 215         image->cmap.red = NULL;
 216         image->cmap.green = NULL;
 217         image->cmap.blue = NULL;
 218         image->cmap.transp = NULL;
 219         image->data = qfbdev->shadow + (clips->x1 * 4) + (stride * clips->y1);
 220
 221         qxl_fb_image_init(&qxl_fb_image, qdev, info, NULL);
 222         qxl_draw_opaque_fb(&qxl_fb_image, stride);
 223
 224         return 0;
 225 }
 226
 227 static const struct drm_framebuffer_funcs qxlfb_fb_funcs = {
 228         .destroy = qxl_user_framebuffer_destroy,
 229         .dirty = qxlfb_framebuffer_dirty,
 230 };
 231
 232 static int qxlfb_create(struct qxl_fbdev *qfbdev,
 233                         struct drm_fb_helper_surface_size *sizes)
 234 {
 235         struct qxl_device *qdev = qfbdev->qdev;
 236         struct fb_info *info;
 237         struct drm_framebuffer *fb = NULL;
 238         struct drm_mode_fb_cmd2 mode_cmd;
 239         struct drm_gem_object *gobj = NULL;
 240         struct qxl_bo *qbo = NULL;
 241         int ret;
 242         int size;
 243         int bpp = sizes->surface_bpp;
 244         int depth = sizes->surface_depth;
 245         void *shadow;
 246
 247         mode_cmd.width = sizes->surface_width;
 248         mode_cmd.height = sizes->surface_height;
 249
 250         mode_cmd.pitches[0] = ALIGN(mode_cmd.width * ((bpp + 1) / 8), 64);
 251         mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
 252
 253         ret = qxlfb_create_pinned_object(qfbdev, &mode_cmd, &gobj);
 254         if (ret < 0)
 255                 return ret;
 256
 257         qbo = gem_to_qxl_bo(gobj);
 258         QXL_INFO(qdev, "%s: %dx%d %d\n", __func__, mode_cmd.width,
 259                  mode_cmd.height, mode_cmd.pitches[0]);
 260
 261         shadow = vmalloc(mode_cmd.pitches[0] * mode_cmd.height);
 262         /* TODO: what's the usual response to memory allocation errors? */
 263         BUG_ON(!shadow);
 264         QXL_INFO(qdev,
 265         "surface0 at gpu offset %lld, mmap_offset %lld (virt %p, shadow %p)\n",
 266                  qxl_bo_gpu_offset(qbo),
 267                  qxl_bo_mmap_offset(qbo),
 268                  qbo->kptr,
 269                  shadow);
 270         size = mode_cmd.pitches[0] * mode_cmd.height;
 271
 272         info = drm_fb_helper_alloc_fbi(&qfbdev->helper);
 273         if (IS_ERR(info)) {
 274                 ret = PTR_ERR(info);
 275                 goto out_unref;
 276         }
 277
 278         info->par = qfbdev;
 279
 280         qxl_framebuffer_init(qdev->ddev, &qfbdev->qfb, &mode_cmd, gobj,
 281                              &qxlfb_fb_funcs);
 282
 283         fb = &qfbdev->qfb.base;
 284
 285         /* setup helper with fb data */
 286         qfbdev->helper.fb = fb;
 287
 288         qfbdev->shadow = shadow;
 289         strcpy(info->fix.id, "qxldrmfb");
 290
 291         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 292
 293         info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT;
 294         info->fbops = &qxlfb_ops;
 295
 296         /*
 297          * TODO: using gobj->size in various places in this function. Not sure
 298          * what the difference between the different sizes is.
 299          */
 300         info->fix.smem_start = qdev->vram_base; /* TODO - correct? */
 301         info->fix.smem_len = gobj->size;
 302         info->screen_base = qfbdev->shadow;
 303         info->screen_size = gobj->size;
 304
 305         drm_fb_helper_fill_var(info, &qfbdev->helper, sizes->fb_width,
 306                                sizes->fb_height);
 307
 308         /* setup aperture base/size for vesafb takeover */
 309         info->apertures->ranges[0].base = qdev->ddev->mode_config.fb_base;
 310         info->apertures->ranges[0].size = qdev->vram_size;
 311
 312         info->fix.mmio_start = 0;
 313         info->fix.mmio_len = 0;
 314
 315         if (info->screen_base == NULL) {
 316                 ret = -ENOSPC;
 317                 goto out_destroy_fbi;
 318         }
 319
 320         info->fbdefio = &qxl_defio;
 321         fb_deferred_io_init(info);
 322
 323         qdev->fbdev_info = info;
 324         qdev->fbdev_qfb = &qfbdev->qfb;
 325         DRM_INFO("fb mappable at 0x%lX, size %lu\n",  info->fix.smem_start, (unsigned long)info->screen_size);
 326         DRM_INFO("fb: depth %d, pitch %d, width %d, height %d\n", fb->depth, fb->pitches[0], fb->width, fb->height);
 327         return 0;
 328
 329 out_destroy_fbi:
 330         drm_fb_helper_release_fbi(&qfbdev->helper);
 331 out_unref:
 332         if (qbo) {
 333                 ret = qxl_bo_reserve(qbo, false);
 334                 if (likely(ret == 0)) {
 335                         qxl_bo_kunmap(qbo);
 336                         qxl_bo_unpin(qbo);
 337                         qxl_bo_unreserve(qbo);
 338                 }
 339         }
 340         if (fb && ret) {
 341                 drm_gem_object_unreference_unlocked(gobj);
 342                 drm_framebuffer_cleanup(fb);
 343                 kfree(fb);
 344         }
 345         drm_gem_object_unreference_unlocked(gobj);
 346         return ret;
 347 }
 348
 349 static int qxl_fb_find_or_create_single(
 350                 struct drm_fb_helper *helper,
 351                 struct drm_fb_helper_surface_size *sizes)
 352 {
 353         struct qxl_fbdev *qfbdev =
 354                 container_of(helper, struct qxl_fbdev, helper);
 355         int new_fb = 0;
 356         int ret;
 357
 358         if (!helper->fb) {
 359                 ret = qxlfb_create(qfbdev, sizes);
 360                 if (ret)
 361                         return ret;
 362                 new_fb = 1;
 363         }
 364         return new_fb;
 365 }
 366
 367 static int qxl_fbdev_destroy(struct drm_device *dev, struct qxl_fbdev *qfbdev)
 368 {
 369         struct qxl_framebuffer *qfb = &qfbdev->qfb;
 370
 371         drm_fb_helper_unregister_fbi(&qfbdev->helper);
 372         drm_fb_helper_release_fbi(&qfbdev->helper);
 373
 374         if (qfb->obj) {
 375                 qxlfb_destroy_pinned_object(qfb->obj);
 376                 qfb->obj = NULL;
 377         }
 378         drm_fb_helper_fini(&qfbdev->helper);
 379         vfree(qfbdev->shadow);
 380         drm_framebuffer_cleanup(&qfb->base);
 381
 382         return 0;
 383 }
 384
 385 static const struct drm_fb_helper_funcs qxl_fb_helper_funcs = {
 386         .fb_probe = qxl_fb_find_or_create_single,
 387 };
 388
 389 int qxl_fbdev_init(struct qxl_device *qdev)
 390 {
 391         struct qxl_fbdev *qfbdev;
 392         int bpp_sel = 32; /* TODO: parameter from somewhere? */
 393         int ret;
 394
 395         qfbdev = kzalloc(sizeof(struct qxl_fbdev), GFP_KERNEL);
 396         if (!qfbdev)
 397                 return -ENOMEM;
 398
 399         qfbdev->qdev = qdev;
 400         qdev->mode_info.qfbdev = qfbdev;
 401         spin_lock_init(&qfbdev->delayed_ops_lock);
 402         INIT_LIST_HEAD(&qfbdev->delayed_ops);
 403
 404         drm_fb_helper_prepare(qdev->ddev, &qfbdev->helper,
 405                               &qxl_fb_helper_funcs);
 406
 407         ret = drm_fb_helper_init(qdev->ddev, &qfbdev->helper,
 408                                  qxl_num_crtc /* num_crtc - QXL supports just 1 */,
 409                                  QXLFB_CONN_LIMIT);
 410         if (ret)
 411                 goto free;
 412
 413         ret = drm_fb_helper_single_add_all_connectors(&qfbdev->helper);
 414         if (ret)
 415                 goto fini;
 416
 417         ret = drm_fb_helper_initial_config(&qfbdev->helper, bpp_sel);
 418         if (ret)
 419                 goto fini;
 420
 421         return 0;
 422
 423 fini:
 424         drm_fb_helper_fini(&qfbdev->helper);
 425 free:
 426         kfree(qfbdev);
 427         return ret;
 428 }
 429
 430 void qxl_fbdev_fini(struct qxl_device *qdev)
 431 {
 432         if (!qdev->mode_info.qfbdev)
 433                 return;
 434
 435         qxl_fbdev_destroy(qdev->ddev, qdev->mode_info.qfbdev);
 436         kfree(qdev->mode_info.qfbdev);
 437         qdev->mode_info.qfbdev = NULL;
 438 }
 439
 440 void qxl_fbdev_set_suspend(struct qxl_device *qdev, int state)
 441 {
 442         drm_fb_helper_set_suspend(&qdev->mode_info.qfbdev->helper, state);
 443 }
 444
 445 bool qxl_fbdev_qobj_is_fb(struct qxl_device *qdev, struct qxl_bo *qobj)
 446 {
 447         if (qobj == gem_to_qxl_bo(qdev->mode_info.qfbdev->qfb.obj))
 448                 return true;
 449         return false;
 450 }