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 <linux/io-mapping.h>
  30
  31 int qxl_log_level;
  32
  33 static void qxl_dump_mode(struct qxl_device *qdev, void *p)
  34 {
  35         struct qxl_mode *m = p;
  36         DRM_DEBUG_KMS("%d: %dx%d %d bits, stride %d, %dmm x %dmm, orientation %d\n",
  37                       m->id, m->x_res, m->y_res, m->bits, m->stride, m->x_mili,
  38                       m->y_mili, m->orientation);
  39 }
  40
  41 static bool qxl_check_device(struct qxl_device *qdev)
  42 {
  43         struct qxl_rom *rom = qdev->rom;
  44         int mode_offset;
  45         int i;
  46
  47         if (rom->magic != 0x4f525851) {
  48                 DRM_ERROR("bad rom signature %x\n", rom->magic);
  49                 return false;
  50         }
  51
  52         DRM_INFO("Device Version %d.%d\n", rom->id, rom->update_id);
  53         DRM_INFO("Compression level %d log level %d\n", rom->compression_level,
  54                  rom->log_level);
  55         DRM_INFO("Currently using mode #%d, list at 0x%x\n",
  56                  rom->mode, rom->modes_offset);
  57         DRM_INFO("%d io pages at offset 0x%x\n",
  58                  rom->num_io_pages, rom->pages_offset);
  59         DRM_INFO("%d byte draw area at offset 0x%x\n",
  60                  rom->surface0_area_size, rom->draw_area_offset);
  61
  62         qdev->vram_size = rom->surface0_area_size;
  63         DRM_INFO("RAM header offset: 0x%x\n", rom->ram_header_offset);
  64
  65         mode_offset = rom->modes_offset / 4;
  66         qdev->mode_info.num_modes = ((u32 *)rom)[mode_offset];
  67         DRM_INFO("rom modes offset 0x%x for %d modes\n", rom->modes_offset,
  68                  qdev->mode_info.num_modes);
  69         qdev->mode_info.modes = (void *)((uint32_t *)rom + mode_offset + 1);
  70         for (i = 0; i < qdev->mode_info.num_modes; i++)
  71                 qxl_dump_mode(qdev, qdev->mode_info.modes + i);
  72         return true;
  73 }
  74
  75 static uint8_t setup_slot(struct qxl_device *qdev, uint8_t slot_index_offset,
  76         unsigned long start_phys_addr, unsigned long end_phys_addr)
  77 {
  78         uint64_t high_bits;
  79         struct qxl_memslot *slot;
  80         uint8_t slot_index;
  81         struct qxl_ram_header *ram_header = qdev->ram_header;
  82
  83         slot_index = qdev->rom->slots_start + slot_index_offset;
  84         slot = &qdev->mem_slots[slot_index];
  85         slot->start_phys_addr = start_phys_addr;
  86         slot->end_phys_addr = end_phys_addr;
  87         ram_header->mem_slot.mem_start = slot->start_phys_addr;
  88         ram_header->mem_slot.mem_end = slot->end_phys_addr;
  89         qxl_io_memslot_add(qdev, slot_index);
  90         slot->generation = qdev->rom->slot_generation;
  91         high_bits = slot_index << qdev->slot_gen_bits;
  92         high_bits |= slot->generation;
  93         high_bits <<= (64 - (qdev->slot_gen_bits + qdev->slot_id_bits));
  94         slot->high_bits = high_bits;
  95         return slot_index;
  96 }
  97
  98 static void qxl_gc_work(struct work_struct *work)
  99 {
 100         struct qxl_device *qdev = container_of(work, struct qxl_device, gc_work);
 101         qxl_garbage_collect(qdev);
 102 }
 103
 104 int qxl_device_init(struct qxl_device *qdev,
 105                     struct drm_device *ddev,
 106                     struct pci_dev *pdev,
 107                     unsigned long flags)
 108 {
 109         int r;
 110
 111         qdev->dev = &pdev->dev;
 112         qdev->ddev = ddev;
 113         qdev->pdev = pdev;
 114         qdev->flags = flags;
 115
 116         mutex_init(&qdev->gem.mutex);
 117         mutex_init(&qdev->update_area_mutex);
 118         mutex_init(&qdev->release_mutex);
 119         mutex_init(&qdev->surf_evict_mutex);
 120         INIT_LIST_HEAD(&qdev->gem.objects);
 121
 122         qdev->rom_base = pci_resource_start(pdev, 2);
 123         qdev->rom_size = pci_resource_len(pdev, 2);
 124         qdev->vram_base = pci_resource_start(pdev, 0);
 125         qdev->surfaceram_base = pci_resource_start(pdev, 1);
 126         qdev->surfaceram_size = pci_resource_len(pdev, 1);
 127         qdev->io_base = pci_resource_start(pdev, 3);
 128
 129         qdev->vram_mapping = io_mapping_create_wc(qdev->vram_base, pci_resource_len(pdev, 0));
 130         qdev->surface_mapping = io_mapping_create_wc(qdev->surfaceram_base, qdev->surfaceram_size);
 131         DRM_DEBUG_KMS("qxl: vram %p-%p(%dM %dk), surface %p-%p(%dM %dk)\n",
 132                  (void *)qdev->vram_base, (void *)pci_resource_end(pdev, 0),
 133                  (int)pci_resource_len(pdev, 0) / 1024 / 1024,
 134                  (int)pci_resource_len(pdev, 0) / 1024,
 135                  (void *)qdev->surfaceram_base,
 136                  (void *)pci_resource_end(pdev, 1),
 137                  (int)qdev->surfaceram_size / 1024 / 1024,
 138                  (int)qdev->surfaceram_size / 1024);
 139
 140         qdev->rom = ioremap(qdev->rom_base, qdev->rom_size);
 141         if (!qdev->rom) {
 142                 pr_err("Unable to ioremap ROM\n");
 143                 return -ENOMEM;
 144         }
 145
 146         qxl_check_device(qdev);
 147
 148         r = qxl_bo_init(qdev);
 149         if (r) {
 150                 DRM_ERROR("bo init failed %d\n", r);
 151                 return r;
 152         }
 153
 154         qdev->ram_header = ioremap(qdev->vram_base +
 155                                    qdev->rom->ram_header_offset,
 156                                    sizeof(*qdev->ram_header));
 157
 158         qdev->command_ring = qxl_ring_create(&(qdev->ram_header->cmd_ring_hdr),
 159                                              sizeof(struct qxl_command),
 160                                              QXL_COMMAND_RING_SIZE,
 161                                              qdev->io_base + QXL_IO_NOTIFY_CMD,
 162                                              false,
 163                                              &qdev->display_event);
 164
 165         qdev->cursor_ring = qxl_ring_create(
 166                                 &(qdev->ram_header->cursor_ring_hdr),
 167                                 sizeof(struct qxl_command),
 168                                 QXL_CURSOR_RING_SIZE,
 169                                 qdev->io_base + QXL_IO_NOTIFY_CMD,
 170                                 false,
 171                                 &qdev->cursor_event);
 172
 173         qdev->release_ring = qxl_ring_create(
 174                                 &(qdev->ram_header->release_ring_hdr),
 175                                 sizeof(uint64_t),
 176                                 QXL_RELEASE_RING_SIZE, 0, true,
 177                                 NULL);
 178
 179         /* TODO - slot initialization should happen on reset. where is our
 180          * reset handler? */
 181         qdev->n_mem_slots = qdev->rom->slots_end;
 182         qdev->slot_gen_bits = qdev->rom->slot_gen_bits;
 183         qdev->slot_id_bits = qdev->rom->slot_id_bits;
 184         qdev->va_slot_mask =
 185                 (~(uint64_t)0) >> (qdev->slot_id_bits + qdev->slot_gen_bits);
 186
 187         qdev->mem_slots =
 188                 kmalloc(qdev->n_mem_slots * sizeof(struct qxl_memslot),
 189                         GFP_KERNEL);
 190
 191         idr_init(&qdev->release_idr);
 192         spin_lock_init(&qdev->release_idr_lock);
 193
 194         idr_init(&qdev->surf_id_idr);
 195         spin_lock_init(&qdev->surf_id_idr_lock);
 196
 197         mutex_init(&qdev->async_io_mutex);
 198
 199         /* reset the device into a known state - no memslots, no primary
 200          * created, no surfaces. */
 201         qxl_io_reset(qdev);
 202
 203         /* must initialize irq before first async io - slot creation */
 204         r = qxl_irq_init(qdev);
 205         if (r)
 206                 return r;
 207
 208         /*
 209          * Note that virtual is surface0. We rely on the single ioremap done
 210          * before.
 211          */
 212         qdev->main_mem_slot = setup_slot(qdev, 0,
 213                 (unsigned long)qdev->vram_base,
 214                 (unsigned long)qdev->vram_base + qdev->rom->ram_header_offset);
 215         qdev->surfaces_mem_slot = setup_slot(qdev, 1,
 216                 (unsigned long)qdev->surfaceram_base,
 217                 (unsigned long)qdev->surfaceram_base + qdev->surfaceram_size);
 218         DRM_INFO("main mem slot %d [%lx,%x)\n",
 219                 qdev->main_mem_slot,
 220                 (unsigned long)qdev->vram_base, qdev->rom->ram_header_offset);
 221
 222
 223         qdev->gc_queue = create_singlethread_workqueue("qxl_gc");
 224         INIT_WORK(&qdev->gc_work, qxl_gc_work);
 225
 226         r = qxl_fb_init(qdev);
 227         if (r)
 228                 return r;
 229
 230         return 0;
 231 }
 232
 233 static void qxl_device_fini(struct qxl_device *qdev)
 234 {
 235         if (qdev->current_release_bo[0])
 236                 qxl_bo_unref(&qdev->current_release_bo[0]);
 237         if (qdev->current_release_bo[1])
 238                 qxl_bo_unref(&qdev->current_release_bo[1]);
 239         flush_workqueue(qdev->gc_queue);
 240         destroy_workqueue(qdev->gc_queue);
 241         qdev->gc_queue = NULL;
 242
 243         qxl_ring_free(qdev->command_ring);
 244         qxl_ring_free(qdev->cursor_ring);
 245         qxl_ring_free(qdev->release_ring);
 246         qxl_bo_fini(qdev);
 247         io_mapping_free(qdev->surface_mapping);
 248         io_mapping_free(qdev->vram_mapping);
 249         iounmap(qdev->ram_header);
 250         iounmap(qdev->rom);
 251         qdev->rom = NULL;
 252         qdev->mode_info.modes = NULL;
 253         qdev->mode_info.num_modes = 0;
 254         qxl_debugfs_remove_files(qdev);
 255 }
 256
 257 int qxl_driver_unload(struct drm_device *dev)
 258 {
 259         struct qxl_device *qdev = dev->dev_private;
 260
 261         if (qdev == NULL)
 262                 return 0;
 263         qxl_modeset_fini(qdev);
 264         qxl_device_fini(qdev);
 265
 266         kfree(qdev);
 267         dev->dev_private = NULL;
 268         return 0;
 269 }
 270
 271 int qxl_driver_load(struct drm_device *dev, unsigned long flags)
 272 {
 273         struct qxl_device *qdev;
 274         int r;
 275
 276         /* require kms */
 277         if (!drm_core_check_feature(dev, DRIVER_MODESET))
 278                 return -ENODEV;
 279
 280         qdev = kzalloc(sizeof(struct qxl_device), GFP_KERNEL);
 281         if (qdev == NULL)
 282                 return -ENOMEM;
 283
 284         dev->dev_private = qdev;
 285
 286         r = qxl_device_init(qdev, dev, dev->pdev, flags);
 287         if (r)
 288                 goto out;
 289
 290         r = qxl_modeset_init(qdev);
 291         if (r) {
 292                 qxl_driver_unload(dev);
 293                 goto out;
 294         }
 295
 296         return 0;
 297 out:
 298         kfree(qdev);
 299         return r;
 300 }
 301
 302