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_probe_helper.h>
  30 #include <linux/io-mapping.h>
  31
  32 int qxl_log_level;
  33
  34 static bool qxl_check_device(struct qxl_device *qdev)
  35 {
  36         struct qxl_rom *rom = qdev->rom;
  37
  38         if (rom->magic != 0x4f525851) {
  39                 DRM_ERROR("bad rom signature %x\n", rom->magic);
  40                 return false;
  41         }
  42
  43         DRM_INFO("Device Version %d.%d\n", rom->id, rom->update_id);
  44         DRM_INFO("Compression level %d log level %d\n", rom->compression_level,
  45                  rom->log_level);
  46         DRM_INFO("%d io pages at offset 0x%x\n",
  47                  rom->num_io_pages, rom->pages_offset);
  48         DRM_INFO("%d byte draw area at offset 0x%x\n",
  49                  rom->surface0_area_size, rom->draw_area_offset);
  50
  51         qdev->vram_size = rom->surface0_area_size;
  52         DRM_INFO("RAM header offset: 0x%x\n", rom->ram_header_offset);
  53         return true;
  54 }
  55
  56 static void setup_hw_slot(struct qxl_device *qdev, struct qxl_memslot *slot)
  57 {
  58         qdev->ram_header->mem_slot.mem_start = slot->start_phys_addr;
  59         qdev->ram_header->mem_slot.mem_end = slot->start_phys_addr + slot->size;
  60         qxl_io_memslot_add(qdev, qdev->rom->slots_start + slot->index);
  61 }
  62
  63 static void setup_slot(struct qxl_device *qdev,
  64                        struct qxl_memslot *slot,
  65                        unsigned int slot_index,
  66                        const char *slot_name,
  67                        unsigned long start_phys_addr,
  68                        unsigned long size)
  69 {
  70         uint64_t high_bits;
  71
  72         slot->index = slot_index;
  73         slot->name = slot_name;
  74         slot->start_phys_addr = start_phys_addr;
  75         slot->size = size;
  76
  77         setup_hw_slot(qdev, slot);
  78
  79         slot->generation = qdev->rom->slot_generation;
  80         high_bits = (qdev->rom->slots_start + slot->index)
  81                 << qdev->rom->slot_gen_bits;
  82         high_bits |= slot->generation;
  83         high_bits <<= (64 - (qdev->rom->slot_gen_bits + qdev->rom->slot_id_bits));
  84         slot->high_bits = high_bits;
  85
  86         DRM_INFO("slot %d (%s): base 0x%08lx, size 0x%08lx, gpu_offset 0x%lx\n",
  87                  slot->index, slot->name,
  88                  (unsigned long)slot->start_phys_addr,
  89                  (unsigned long)slot->size,
  90                  (unsigned long)slot->gpu_offset);
  91 }
  92
  93 void qxl_reinit_memslots(struct qxl_device *qdev)
  94 {
  95         setup_hw_slot(qdev, &qdev->main_slot);
  96         setup_hw_slot(qdev, &qdev->surfaces_slot);
  97 }
  98
  99 static void qxl_gc_work(struct work_struct *work)
 100 {
 101         struct qxl_device *qdev = container_of(work, struct qxl_device, gc_work);
 102
 103         qxl_garbage_collect(qdev);
 104 }
 105
 106 int qxl_device_init(struct qxl_device *qdev,
 107                     struct drm_driver *drv,
 108                     struct pci_dev *pdev)
 109 {
 110         int r, sb;
 111
 112         r = drm_dev_init(&qdev->ddev, drv, &pdev->dev);
 113         if (r) {
 114                 pr_err("Unable to init drm dev");
 115                 goto error;
 116         }
 117
 118         qdev->ddev.pdev = pdev;
 119         pci_set_drvdata(pdev, &qdev->ddev);
 120         qdev->ddev.dev_private = qdev;
 121
 122         mutex_init(&qdev->gem.mutex);
 123         mutex_init(&qdev->update_area_mutex);
 124         mutex_init(&qdev->release_mutex);
 125         mutex_init(&qdev->surf_evict_mutex);
 126         qxl_gem_init(qdev);
 127
 128         qdev->rom_base = pci_resource_start(pdev, 2);
 129         qdev->rom_size = pci_resource_len(pdev, 2);
 130         qdev->vram_base = pci_resource_start(pdev, 0);
 131         qdev->io_base = pci_resource_start(pdev, 3);
 132
 133         qdev->vram_mapping = io_mapping_create_wc(qdev->vram_base, pci_resource_len(pdev, 0));
 134         if (!qdev->vram_mapping) {
 135                 pr_err("Unable to create vram_mapping");
 136                 r = -ENOMEM;
 137                 goto error;
 138         }
 139
 140         if (pci_resource_len(pdev, 4) > 0) {
 141                 /* 64bit surface bar present */
 142                 sb = 4;
 143                 qdev->surfaceram_base = pci_resource_start(pdev, sb);
 144                 qdev->surfaceram_size = pci_resource_len(pdev, sb);
 145                 qdev->surface_mapping =
 146                         io_mapping_create_wc(qdev->surfaceram_base,
 147                                              qdev->surfaceram_size);
 148         }
 149         if (qdev->surface_mapping == NULL) {
 150                 /* 64bit surface bar not present (or mapping failed) */
 151                 sb = 1;
 152                 qdev->surfaceram_base = pci_resource_start(pdev, sb);
 153                 qdev->surfaceram_size = pci_resource_len(pdev, sb);
 154                 qdev->surface_mapping =
 155                         io_mapping_create_wc(qdev->surfaceram_base,
 156                                              qdev->surfaceram_size);
 157                 if (!qdev->surface_mapping) {
 158                         pr_err("Unable to create surface_mapping");
 159                         r = -ENOMEM;
 160                         goto vram_mapping_free;
 161                 }
 162         }
 163
 164         DRM_DEBUG_KMS("qxl: vram %llx-%llx(%dM %dk), surface %llx-%llx(%dM %dk, %s)\n",
 165                  (unsigned long long)qdev->vram_base,
 166                  (unsigned long long)pci_resource_end(pdev, 0),
 167                  (int)pci_resource_len(pdev, 0) / 1024 / 1024,
 168                  (int)pci_resource_len(pdev, 0) / 1024,
 169                  (unsigned long long)qdev->surfaceram_base,
 170                  (unsigned long long)pci_resource_end(pdev, sb),
 171                  (int)qdev->surfaceram_size / 1024 / 1024,
 172                  (int)qdev->surfaceram_size / 1024,
 173                  (sb == 4) ? "64bit" : "32bit");
 174
 175         qdev->rom = ioremap(qdev->rom_base, qdev->rom_size);
 176         if (!qdev->rom) {
 177                 pr_err("Unable to ioremap ROM\n");
 178                 r = -ENOMEM;
 179                 goto surface_mapping_free;
 180         }
 181
 182         if (!qxl_check_device(qdev)) {
 183                 r = -ENODEV;
 184                 goto surface_mapping_free;
 185         }
 186
 187         r = qxl_bo_init(qdev);
 188         if (r) {
 189                 DRM_ERROR("bo init failed %d\n", r);
 190                 goto rom_unmap;
 191         }
 192
 193         qdev->ram_header = ioremap(qdev->vram_base +
 194                                    qdev->rom->ram_header_offset,
 195                                    sizeof(*qdev->ram_header));
 196         if (!qdev->ram_header) {
 197                 DRM_ERROR("Unable to ioremap RAM header\n");
 198                 r = -ENOMEM;
 199                 goto bo_fini;
 200         }
 201
 202         qdev->command_ring = qxl_ring_create(&(qdev->ram_header->cmd_ring_hdr),
 203                                              sizeof(struct qxl_command),
 204                                              QXL_COMMAND_RING_SIZE,
 205                                              qdev->io_base + QXL_IO_NOTIFY_CMD,
 206                                              false,
 207                                              &qdev->display_event);
 208         if (!qdev->command_ring) {
 209                 DRM_ERROR("Unable to create command ring\n");
 210                 r = -ENOMEM;
 211                 goto ram_header_unmap;
 212         }
 213
 214         qdev->cursor_ring = qxl_ring_create(
 215                                 &(qdev->ram_header->cursor_ring_hdr),
 216                                 sizeof(struct qxl_command),
 217                                 QXL_CURSOR_RING_SIZE,
 218                                 qdev->io_base + QXL_IO_NOTIFY_CMD,
 219                                 false,
 220                                 &qdev->cursor_event);
 221
 222         if (!qdev->cursor_ring) {
 223                 DRM_ERROR("Unable to create cursor ring\n");
 224                 r = -ENOMEM;
 225                 goto command_ring_free;
 226         }
 227
 228         qdev->release_ring = qxl_ring_create(
 229                                 &(qdev->ram_header->release_ring_hdr),
 230                                 sizeof(uint64_t),
 231                                 QXL_RELEASE_RING_SIZE, 0, true,
 232                                 NULL);
 233
 234         if (!qdev->release_ring) {
 235                 DRM_ERROR("Unable to create release ring\n");
 236                 r = -ENOMEM;
 237                 goto cursor_ring_free;
 238         }
 239
 240         idr_init(&qdev->release_idr);
 241         spin_lock_init(&qdev->release_idr_lock);
 242         spin_lock_init(&qdev->release_lock);
 243
 244         idr_init(&qdev->surf_id_idr);
 245         spin_lock_init(&qdev->surf_id_idr_lock);
 246
 247         mutex_init(&qdev->async_io_mutex);
 248
 249         /* reset the device into a known state - no memslots, no primary
 250          * created, no surfaces. */
 251         qxl_io_reset(qdev);
 252
 253         /* must initialize irq before first async io - slot creation */
 254         r = qxl_irq_init(qdev);
 255         if (r) {
 256                 DRM_ERROR("Unable to init qxl irq\n");
 257                 goto release_ring_free;
 258         }
 259
 260         /*
 261          * Note that virtual is surface0. We rely on the single ioremap done
 262          * before.
 263          */
 264         setup_slot(qdev, &qdev->main_slot, 0, "main",
 265                    (unsigned long)qdev->vram_base,
 266                    (unsigned long)qdev->rom->ram_header_offset);
 267         setup_slot(qdev, &qdev->surfaces_slot, 1, "surfaces",
 268                    (unsigned long)qdev->surfaceram_base,
 269                    (unsigned long)qdev->surfaceram_size);
 270
 271         INIT_WORK(&qdev->gc_work, qxl_gc_work);
 272
 273         return 0;
 274
 275 release_ring_free:
 276         qxl_ring_free(qdev->release_ring);
 277 cursor_ring_free:
 278         qxl_ring_free(qdev->cursor_ring);
 279 command_ring_free:
 280         qxl_ring_free(qdev->command_ring);
 281 ram_header_unmap:
 282         iounmap(qdev->ram_header);
 283 bo_fini:
 284         qxl_bo_fini(qdev);
 285 rom_unmap:
 286         iounmap(qdev->rom);
 287 surface_mapping_free:
 288         io_mapping_free(qdev->surface_mapping);
 289 vram_mapping_free:
 290         io_mapping_free(qdev->vram_mapping);
 291 error:
 292         return r;
 293 }
 294
 295 void qxl_device_fini(struct qxl_device *qdev)
 296 {
 297         qxl_bo_unref(&qdev->current_release_bo[0]);
 298         qxl_bo_unref(&qdev->current_release_bo[1]);
 299         flush_work(&qdev->gc_work);
 300         qxl_ring_free(qdev->command_ring);
 301         qxl_ring_free(qdev->cursor_ring);
 302         qxl_ring_free(qdev->release_ring);
 303         qxl_gem_fini(qdev);
 304         qxl_bo_fini(qdev);
 305         io_mapping_free(qdev->surface_mapping);
 306         io_mapping_free(qdev->vram_mapping);
 307         iounmap(qdev->ram_header);
 308         iounmap(qdev->rom);
 309         qdev->rom = NULL;
 310 }