kernel/drivers/gpu/drm/qxl/qxl_kms.c

   1 /*
   2  * Copyright 2013 Red Hat Inc.
   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 shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Dave Airlie
  23  *          Alon Levy
  24  */
  25
  26 #include "qxl_drv.h"
  27 #include "qxl_object.h"
  28
  29 #include <drm/drm_crtc_helper.h>
  30 #include <linux/io-mapping.h>
  31
  32 int qxl_log_level;
  33
  34 static void qxl_dump_mode(struct qxl_device *qdev, void *p)
  35 {
  36         struct qxl_mode *m = p;
  37         DRM_DEBUG_KMS("%d: %dx%d %d bits, stride %d, %dmm x %dmm, orientation %d\n",
  38                       m->id, m->x_res, m->y_res, m->bits, m->stride, m->x_mili,
  39                       m->y_mili, m->orientation);
  40 }
  41
  42 static bool qxl_check_device(struct qxl_device *qdev)
  43 {
  44         struct qxl_rom *rom = qdev->rom;
  45         int mode_offset;
  46         int i;
  47
  48         if (rom->magic != 0x4f525851) {
  49                 DRM_ERROR("bad rom signature %x\n", rom->magic);
  50                 return false;
  51         }
  52
  53         DRM_INFO("Device Version %d.%d\n", rom->id, rom->update_id);
  54         DRM_INFO("Compression level %d log level %d\n", rom->compression_level,
  55                  rom->log_level);
  56         DRM_INFO("Currently using mode #%d, list at 0x%x\n",
  57                  rom->mode, rom->modes_offset);
  58         DRM_INFO("%d io pages at offset 0x%x\n",
  59                  rom->num_io_pages, rom->pages_offset);
  60         DRM_INFO("%d byte draw area at offset 0x%x\n",
  61                  rom->surface0_area_size, rom->draw_area_offset);
  62
  63         qdev->vram_size = rom->surface0_area_size;
  64         DRM_INFO("RAM header offset: 0x%x\n", rom->ram_header_offset);
  65
  66         mode_offset = rom->modes_offset / 4;
  67         qdev->mode_info.num_modes = ((u32 *)rom)[mode_offset];
  68         DRM_INFO("rom modes offset 0x%x for %d modes\n", rom->modes_offset,
  69                  qdev->mode_info.num_modes);
  70         qdev->mode_info.modes = (void *)((uint32_t *)rom + mode_offset + 1);
  71         for (i = 0; i < qdev->mode_info.num_modes; i++)
  72                 qxl_dump_mode(qdev, qdev->mode_info.modes + i);
  73         return true;
  74 }
  75
  76 static void setup_hw_slot(struct qxl_device *qdev, int slot_index,
  77                           struct qxl_memslot *slot)
  78 {
  79         qdev->ram_header->mem_slot.mem_start = slot->start_phys_addr;
  80         qdev->ram_header->mem_slot.mem_end = slot->end_phys_addr;
  81         qxl_io_memslot_add(qdev, slot_index);
  82 }
  83
  84 static uint8_t setup_slot(struct qxl_device *qdev, uint8_t slot_index_offset,
  85         unsigned long start_phys_addr, unsigned long end_phys_addr)
  86 {
  87         uint64_t high_bits;
  88         struct qxl_memslot *slot;
  89         uint8_t slot_index;
  90
  91         slot_index = qdev->rom->slots_start + slot_index_offset;
  92         slot = &qdev->mem_slots[slot_index];
  93         slot->start_phys_addr = start_phys_addr;
  94         slot->end_phys_addr = end_phys_addr;
  95
  96         setup_hw_slot(qdev, slot_index, slot);
  97
  98         slot->generation = qdev->rom->slot_generation;
  99         high_bits = slot_index << qdev->slot_gen_bits;
 100         high_bits |= slot->generation;
 101         high_bits <<= (64 - (qdev->slot_gen_bits + qdev->slot_id_bits));
 102         slot->high_bits = high_bits;
 103         return slot_index;
 104 }
 105
 106 void qxl_reinit_memslots(struct qxl_device *qdev)
 107 {
 108         setup_hw_slot(qdev, qdev->main_mem_slot, &qdev->mem_slots[qdev->main_mem_slot]);
 109         setup_hw_slot(qdev, qdev->surfaces_mem_slot, &qdev->mem_slots[qdev->surfaces_mem_slot]);
 110 }
 111
 112 static void qxl_gc_work(struct work_struct *work)
 113 {
 114         struct qxl_device *qdev = container_of(work, struct qxl_device, gc_work);
 115         qxl_garbage_collect(qdev);
 116 }
 117
 118 static int qxl_device_init(struct qxl_device *qdev,
 119                     struct drm_device *ddev,
 120                     struct pci_dev *pdev,
 121                     unsigned long flags)
 122 {
 123         int r, sb;
 124
 125         qdev->dev = &pdev->dev;
 126         qdev->ddev = ddev;
 127         qdev->pdev = pdev;
 128         qdev->flags = flags;
 129
 130         mutex_init(&qdev->gem.mutex);
 131         mutex_init(&qdev->update_area_mutex);
 132         mutex_init(&qdev->release_mutex);
 133         mutex_init(&qdev->surf_evict_mutex);
 134         INIT_LIST_HEAD(&qdev->gem.objects);
 135
 136         qdev->rom_base = pci_resource_start(pdev, 2);
 137         qdev->rom_size = pci_resource_len(pdev, 2);
 138         qdev->vram_base = pci_resource_start(pdev, 0);
 139         qdev->io_base = pci_resource_start(pdev, 3);
 140
 141         qdev->vram_mapping = io_mapping_create_wc(qdev->vram_base, pci_resource_len(pdev, 0));
 142
 143         if (pci_resource_len(pdev, 4) > 0) {
 144                 /* 64bit surface bar present */
 145                 sb = 4;
 146                 qdev->surfaceram_base = pci_resource_start(pdev, sb);
 147                 qdev->surfaceram_size = pci_resource_len(pdev, sb);
 148                 qdev->surface_mapping =
 149                         io_mapping_create_wc(qdev->surfaceram_base,
 150                                              qdev->surfaceram_size);
 151         }
 152         if (qdev->surface_mapping == NULL) {
 153                 /* 64bit surface bar not present (or mapping failed) */
 154                 sb = 1;
 155                 qdev->surfaceram_base = pci_resource_start(pdev, sb);
 156                 qdev->surfaceram_size = pci_resource_len(pdev, sb);
 157                 qdev->surface_mapping =
 158                         io_mapping_create_wc(qdev->surfaceram_base,
 159                                              qdev->surfaceram_size);
 160         }
 161
 162         DRM_DEBUG_KMS("qxl: vram %llx-%llx(%dM %dk), surface %llx-%llx(%dM %dk, %s)\n",
 163                  (unsigned long long)qdev->vram_base,
 164                  (unsigned long long)pci_resource_end(pdev, 0),
 165                  (int)pci_resource_len(pdev, 0) / 1024 / 1024,
 166                  (int)pci_resource_len(pdev, 0) / 1024,
 167                  (unsigned long long)qdev->surfaceram_base,
 168                  (unsigned long long)pci_resource_end(pdev, sb),
 169                  (int)qdev->surfaceram_size / 1024 / 1024,
 170                  (int)qdev->surfaceram_size / 1024,
 171                  (sb == 4) ? "64bit" : "32bit");
 172
 173         qdev->rom = ioremap(qdev->rom_base, qdev->rom_size);
 174         if (!qdev->rom) {
 175                 pr_err("Unable to ioremap ROM\n");
 176                 return -ENOMEM;
 177         }
 178
 179         qxl_check_device(qdev);
 180
 181         r = qxl_bo_init(qdev);
 182         if (r) {
 183                 DRM_ERROR("bo init failed %d\n", r);
 184                 return r;
 185         }
 186
 187         qdev->ram_header = ioremap(qdev->vram_base +
 188                                    qdev->rom->ram_header_offset,
 189                                    sizeof(*qdev->ram_header));
 190
 191         qdev->command_ring = qxl_ring_create(&(qdev->ram_header->cmd_ring_hdr),
 192                                              sizeof(struct qxl_command),
 193                                              QXL_COMMAND_RING_SIZE,
 194                                              qdev->io_base + QXL_IO_NOTIFY_CMD,
 195                                              false,
 196                                              &qdev->display_event);
 197
 198         qdev->cursor_ring = qxl_ring_create(
 199                                 &(qdev->ram_header->cursor_ring_hdr),
 200                                 sizeof(struct qxl_command),
 201                                 QXL_CURSOR_RING_SIZE,
 202                                 qdev->io_base + QXL_IO_NOTIFY_CMD,
 203                                 false,
 204                                 &qdev->cursor_event);
 205
 206         qdev->release_ring = qxl_ring_create(
 207                                 &(qdev->ram_header->release_ring_hdr),
 208                                 sizeof(uint64_t),
 209                                 QXL_RELEASE_RING_SIZE, 0, true,
 210                                 NULL);
 211
 212         /* TODO - slot initialization should happen on reset. where is our
 213          * reset handler? */
 214         qdev->n_mem_slots = qdev->rom->slots_end;
 215         qdev->slot_gen_bits = qdev->rom->slot_gen_bits;
 216         qdev->slot_id_bits = qdev->rom->slot_id_bits;
 217         qdev->va_slot_mask =
 218                 (~(uint64_t)0) >> (qdev->slot_id_bits + qdev->slot_gen_bits);
 219
 220         qdev->mem_slots =
 221                 kmalloc(qdev->n_mem_slots * sizeof(struct qxl_memslot),
 222                         GFP_KERNEL);
 223
 224         idr_init(&qdev->release_idr);
 225         spin_lock_init(&qdev->release_idr_lock);
 226         spin_lock_init(&qdev->release_lock);
 227
 228         idr_init(&qdev->surf_id_idr);
 229         spin_lock_init(&qdev->surf_id_idr_lock);
 230
 231         mutex_init(&qdev->async_io_mutex);
 232
 233         /* reset the device into a known state - no memslots, no primary
 234          * created, no surfaces. */
 235         qxl_io_reset(qdev);
 236
 237         /* must initialize irq before first async io - slot creation */
 238         r = qxl_irq_init(qdev);
 239         if (r)
 240                 return r;
 241
 242         /*
 243          * Note that virtual is surface0. We rely on the single ioremap done
 244          * before.
 245          */
 246         qdev->main_mem_slot = setup_slot(qdev, 0,
 247                 (unsigned long)qdev->vram_base,
 248                 (unsigned long)qdev->vram_base + qdev->rom->ram_header_offset);
 249         qdev->surfaces_mem_slot = setup_slot(qdev, 1,
 250                 (unsigned long)qdev->surfaceram_base,
 251                 (unsigned long)qdev->surfaceram_base + qdev->surfaceram_size);
 252         DRM_INFO("main mem slot %d [%lx,%x]\n",
 253                  qdev->main_mem_slot,
 254                  (unsigned long)qdev->vram_base, qdev->rom->ram_header_offset);
 255         DRM_INFO("surface mem slot %d [%lx,%lx]\n",
 256                  qdev->surfaces_mem_slot,
 257                  (unsigned long)qdev->surfaceram_base,
 258                  (unsigned long)qdev->surfaceram_size);
 259
 260
 261         qdev->gc_queue = create_singlethread_workqueue("qxl_gc");
 262         INIT_WORK(&qdev->gc_work, qxl_gc_work);
 263
 264         r = qxl_fb_init(qdev);
 265         if (r)
 266                 return r;
 267
 268         return 0;
 269 }
 270
 271 static void qxl_device_fini(struct qxl_device *qdev)
 272 {
 273         if (qdev->current_release_bo[0])
 274                 qxl_bo_unref(&qdev->current_release_bo[0]);
 275         if (qdev->current_release_bo[1])
 276                 qxl_bo_unref(&qdev->current_release_bo[1]);
 277         flush_workqueue(qdev->gc_queue);
 278         destroy_workqueue(qdev->gc_queue);
 279         qdev->gc_queue = NULL;
 280
 281         qxl_ring_free(qdev->command_ring);
 282         qxl_ring_free(qdev->cursor_ring);
 283         qxl_ring_free(qdev->release_ring);
 284         qxl_bo_fini(qdev);
 285         io_mapping_free(qdev->surface_mapping);
 286         io_mapping_free(qdev->vram_mapping);
 287         iounmap(qdev->ram_header);
 288         iounmap(qdev->rom);
 289         qdev->rom = NULL;
 290         qdev->mode_info.modes = NULL;
 291         qdev->mode_info.num_modes = 0;
 292         qxl_debugfs_remove_files(qdev);
 293 }
 294
 295 int qxl_driver_unload(struct drm_device *dev)
 296 {
 297         struct qxl_device *qdev = dev->dev_private;
 298
 299         if (qdev == NULL)
 300                 return 0;
 301
 302         drm_vblank_cleanup(dev);
 303
 304         qxl_modeset_fini(qdev);
 305         qxl_device_fini(qdev);
 306
 307         kfree(qdev);
 308         dev->dev_private = NULL;
 309         return 0;
 310 }
 311
 312 int qxl_driver_load(struct drm_device *dev, unsigned long flags)
 313 {
 314         struct qxl_device *qdev;
 315         int r;
 316
 317         /* require kms */
 318         if (!drm_core_check_feature(dev, DRIVER_MODESET))
 319                 return -ENODEV;
 320
 321         qdev = kzalloc(sizeof(struct qxl_device), GFP_KERNEL);
 322         if (qdev == NULL)
 323                 return -ENOMEM;
 324
 325         dev->dev_private = qdev;
 326
 327         r = qxl_device_init(qdev, dev, dev->pdev, flags);
 328         if (r)
 329                 goto out;
 330
 331         r = drm_vblank_init(dev, 1);
 332         if (r)
 333                 goto unload;
 334
 335         r = qxl_modeset_init(qdev);
 336         if (r)
 337                 goto unload;
 338
 339         drm_kms_helper_poll_init(qdev->ddev);
 340
 341         return 0;
 342 unload:
 343         qxl_driver_unload(dev);
 344
 345 out:
 346         kfree(qdev);
 347         return r;
 348 }
 349
 350