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 <linux/io-mapping.h>
  27 #include <linux/pci.h>
  28
  29 #include <drm/drm_drv.h>
  30 #include <drm/drm_probe_helper.h>
  31
  32 #include "qxl_drv.h"
  33 #include "qxl_object.h"
  34
  35 int qxl_log_level;
  36
  37 static bool qxl_check_device(struct qxl_device *qdev)
  38 {
  39         struct qxl_rom *rom = qdev->rom;
  40
  41         if (rom->magic != 0x4f525851) {
  42                 DRM_ERROR("bad rom signature %x\n", rom->magic);
  43                 return false;
  44         }
  45
  46         DRM_INFO("Device Version %d.%d\n", rom->id, rom->update_id);
  47         DRM_INFO("Compression level %d log level %d\n", rom->compression_level,
  48                  rom->log_level);
  49         DRM_INFO("%d io pages at offset 0x%x\n",
  50                  rom->num_io_pages, rom->pages_offset);
  51         DRM_INFO("%d byte draw area at offset 0x%x\n",
  52                  rom->surface0_area_size, rom->draw_area_offset);
  53
  54         qdev->vram_size = rom->surface0_area_size;
  55         DRM_INFO("RAM header offset: 0x%x\n", rom->ram_header_offset);
  56         return true;
  57 }
  58
  59 static void setup_hw_slot(struct qxl_device *qdev, struct qxl_memslot *slot)
  60 {
  61         qdev->ram_header->mem_slot.mem_start = slot->start_phys_addr;
  62         qdev->ram_header->mem_slot.mem_end = slot->start_phys_addr + slot->size;
  63         qxl_io_memslot_add(qdev, qdev->rom->slots_start + slot->index);
  64 }
  65
  66 static void setup_slot(struct qxl_device *qdev,
  67                        struct qxl_memslot *slot,
  68                        unsigned int slot_index,
  69                        const char *slot_name,
  70                        unsigned long start_phys_addr,
  71                        unsigned long size)
  72 {
  73         uint64_t high_bits;
  74
  75         slot->index = slot_index;
  76         slot->name = slot_name;
  77         slot->start_phys_addr = start_phys_addr;
  78         slot->size = size;
  79
  80         setup_hw_slot(qdev, slot);
  81
  82         slot->generation = qdev->rom->slot_generation;
  83         high_bits = (qdev->rom->slots_start + slot->index)
  84                 << qdev->rom->slot_gen_bits;
  85         high_bits |= slot->generation;
  86         high_bits <<= (64 - (qdev->rom->slot_gen_bits + qdev->rom->slot_id_bits));
  87         slot->high_bits = high_bits;
  88
  89         DRM_INFO("slot %d (%s): base 0x%08lx, size 0x%08lx, gpu_offset 0x%lx\n",
  90                  slot->index, slot->name,
  91                  (unsigned long)slot->start_phys_addr,
  92                  (unsigned long)slot->size,
  93                  (unsigned long)slot->gpu_offset);
  94 }
  95
  96 void qxl_reinit_memslots(struct qxl_device *qdev)
  97 {
  98         setup_hw_slot(qdev, &qdev->main_slot);
  99         setup_hw_slot(qdev, &qdev->surfaces_slot);
 100 }
 101
 102 static void qxl_gc_work(struct work_struct *work)
 103 {
 104         struct qxl_device *qdev = container_of(work, struct qxl_device, gc_work);
 105
 106         qxl_garbage_collect(qdev);
 107 }
 108
 109 int qxl_device_init(struct qxl_device *qdev,
 110                     struct drm_driver *drv,
 111                     struct pci_dev *pdev)
 112 {
 113         int r, sb;
 114
 115         r = drm_dev_init(&qdev->ddev, drv, &pdev->dev);
 116         if (r) {
 117                 pr_err("Unable to init drm dev");
 118                 goto error;
 119         }
 120
 121         qdev->ddev.pdev = pdev;
 122         pci_set_drvdata(pdev, &qdev->ddev);
 123         qdev->ddev.dev_private = qdev;
 124
 125         mutex_init(&qdev->gem.mutex);
 126         mutex_init(&qdev->update_area_mutex);
 127         mutex_init(&qdev->release_mutex);
 128         mutex_init(&qdev->surf_evict_mutex);
 129         qxl_gem_init(qdev);
 130
 131         qdev->rom_base = pci_resource_start(pdev, 2);
 132         qdev->rom_size = pci_resource_len(pdev, 2);
 133         qdev->vram_base = pci_resource_start(pdev, 0);
 134         qdev->io_base = pci_resource_start(pdev, 3);
 135
 136         qdev->vram_mapping = io_mapping_create_wc(qdev->vram_base, pci_resource_len(pdev, 0));
 137         if (!qdev->vram_mapping) {
 138                 pr_err("Unable to create vram_mapping");
 139                 r = -ENOMEM;
 140                 goto error;
 141         }
 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                 if (!qdev->surface_mapping) {
 161                         pr_err("Unable to create surface_mapping");
 162                         r = -ENOMEM;
 163                         goto vram_mapping_free;
 164                 }
 165         }
 166
 167         DRM_DEBUG_KMS("qxl: vram %llx-%llx(%dM %dk), surface %llx-%llx(%dM %dk, %s)\n",
 168                  (unsigned long long)qdev->vram_base,
 169                  (unsigned long long)pci_resource_end(pdev, 0),
 170                  (int)pci_resource_len(pdev, 0) / 1024 / 1024,
 171                  (int)pci_resource_len(pdev, 0) / 1024,
 172                  (unsigned long long)qdev->surfaceram_base,
 173                  (unsigned long long)pci_resource_end(pdev, sb),
 174                  (int)qdev->surfaceram_size / 1024 / 1024,
 175                  (int)qdev->surfaceram_size / 1024,
 176                  (sb == 4) ? "64bit" : "32bit");
 177
 178         qdev->rom = ioremap(qdev->rom_base, qdev->rom_size);
 179         if (!qdev->rom) {
 180                 pr_err("Unable to ioremap ROM\n");
 181                 r = -ENOMEM;
 182                 goto surface_mapping_free;
 183         }
 184
 185         if (!qxl_check_device(qdev)) {
 186                 r = -ENODEV;
 187                 goto rom_unmap;
 188         }
 189
 190         r = qxl_bo_init(qdev);
 191         if (r) {
 192                 DRM_ERROR("bo init failed %d\n", r);
 193                 goto rom_unmap;
 194         }
 195
 196         qdev->ram_header = ioremap(qdev->vram_base +
 197                                    qdev->rom->ram_header_offset,
 198                                    sizeof(*qdev->ram_header));
 199         if (!qdev->ram_header) {
 200                 DRM_ERROR("Unable to ioremap RAM header\n");
 201                 r = -ENOMEM;
 202                 goto bo_fini;
 203         }
 204
 205         qdev->command_ring = qxl_ring_create(&(qdev->ram_header->cmd_ring_hdr),
 206                                              sizeof(struct qxl_command),
 207                                              QXL_COMMAND_RING_SIZE,
 208                                              qdev->io_base + QXL_IO_NOTIFY_CMD,
 209                                              false,
 210                                              &qdev->display_event);
 211         if (!qdev->command_ring) {
 212                 DRM_ERROR("Unable to create command ring\n");
 213                 r = -ENOMEM;
 214                 goto ram_header_unmap;
 215         }
 216
 217         qdev->cursor_ring = qxl_ring_create(
 218                                 &(qdev->ram_header->cursor_ring_hdr),
 219                                 sizeof(struct qxl_command),
 220                                 QXL_CURSOR_RING_SIZE,
 221                                 qdev->io_base + QXL_IO_NOTIFY_CMD,
 222                                 false,
 223                                 &qdev->cursor_event);
 224
 225         if (!qdev->cursor_ring) {
 226                 DRM_ERROR("Unable to create cursor ring\n");
 227                 r = -ENOMEM;
 228                 goto command_ring_free;
 229         }
 230
 231         qdev->release_ring = qxl_ring_create(
 232                                 &(qdev->ram_header->release_ring_hdr),
 233                                 sizeof(uint64_t),
 234                                 QXL_RELEASE_RING_SIZE, 0, true,
 235                                 NULL);
 236
 237         if (!qdev->release_ring) {
 238                 DRM_ERROR("Unable to create release ring\n");
 239                 r = -ENOMEM;
 240                 goto cursor_ring_free;
 241         }
 242
 243         idr_init(&qdev->release_idr);
 244         spin_lock_init(&qdev->release_idr_lock);
 245         spin_lock_init(&qdev->release_lock);
 246
 247         idr_init(&qdev->surf_id_idr);
 248         spin_lock_init(&qdev->surf_id_idr_lock);
 249
 250         mutex_init(&qdev->async_io_mutex);
 251
 252         /* reset the device into a known state - no memslots, no primary
 253          * created, no surfaces. */
 254         qxl_io_reset(qdev);
 255
 256         /* must initialize irq before first async io - slot creation */
 257         r = qxl_irq_init(qdev);
 258         if (r) {
 259                 DRM_ERROR("Unable to init qxl irq\n");
 260                 goto release_ring_free;
 261         }
 262
 263         /*
 264          * Note that virtual is surface0. We rely on the single ioremap done
 265          * before.
 266          */
 267         setup_slot(qdev, &qdev->main_slot, 0, "main",
 268                    (unsigned long)qdev->vram_base,
 269                    (unsigned long)qdev->rom->ram_header_offset);
 270         setup_slot(qdev, &qdev->surfaces_slot, 1, "surfaces",
 271                    (unsigned long)qdev->surfaceram_base,
 272                    (unsigned long)qdev->surfaceram_size);
 273
 274         INIT_WORK(&qdev->gc_work, qxl_gc_work);
 275
 276         return 0;
 277
 278 release_ring_free:
 279         qxl_ring_free(qdev->release_ring);
 280 cursor_ring_free:
 281         qxl_ring_free(qdev->cursor_ring);
 282 command_ring_free:
 283         qxl_ring_free(qdev->command_ring);
 284 ram_header_unmap:
 285         iounmap(qdev->ram_header);
 286 bo_fini:
 287         qxl_bo_fini(qdev);
 288 rom_unmap:
 289         iounmap(qdev->rom);
 290 surface_mapping_free:
 291         io_mapping_free(qdev->surface_mapping);
 292 vram_mapping_free:
 293         io_mapping_free(qdev->vram_mapping);
 294 error:
 295         return r;
 296 }
 297
 298 void qxl_device_fini(struct qxl_device *qdev)
 299 {
 300         qxl_bo_unref(&qdev->current_release_bo[0]);
 301         qxl_bo_unref(&qdev->current_release_bo[1]);
 302         flush_work(&qdev->gc_work);
 303         qxl_ring_free(qdev->command_ring);
 304         qxl_ring_free(qdev->cursor_ring);
 305         qxl_ring_free(qdev->release_ring);
 306         qxl_gem_fini(qdev);
 307         qxl_bo_fini(qdev);
 308         io_mapping_free(qdev->surface_mapping);
 309         io_mapping_free(qdev->vram_mapping);
 310         iounmap(qdev->ram_header);
 311         iounmap(qdev->rom);
 312         qdev->rom = NULL;
 313 }