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