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 static bool qxl_check_device(struct qxl_device *qdev)
  37 {
  38         struct qxl_rom *rom = qdev->rom;
  39
  40         if (rom->magic != 0x4f525851) {
  41                 DRM_ERROR("bad rom signature %x\n", rom->magic);
  42                 return false;
  43         }
  44
  45         DRM_INFO("Device Version %d.%d\n", rom->id, rom->update_id);
  46         DRM_INFO("Compression level %d log level %d\n", rom->compression_level,
  47                  rom->log_level);
  48         DRM_INFO("%d io pages at offset 0x%x\n",
  49                  rom->num_io_pages, rom->pages_offset);
  50         DRM_INFO("%d byte draw area at offset 0x%x\n",
  51                  rom->surface0_area_size, rom->draw_area_offset);
  52
  53         qdev->vram_size = rom->surface0_area_size;
  54         DRM_INFO("RAM header offset: 0x%x\n", rom->ram_header_offset);
  55         return true;
  56 }
  57
  58 static void setup_hw_slot(struct qxl_device *qdev, struct qxl_memslot *slot)
  59 {
  60         qdev->ram_header->mem_slot.mem_start = slot->start_phys_addr;
  61         qdev->ram_header->mem_slot.mem_end = slot->start_phys_addr + slot->size;
  62         qxl_io_memslot_add(qdev, qdev->rom->slots_start + slot->index);
  63 }
  64
  65 static void setup_slot(struct qxl_device *qdev,
  66                        struct qxl_memslot *slot,
  67                        unsigned int slot_index,
  68                        const char *slot_name,
  69                        unsigned long start_phys_addr,
  70                        unsigned long size)
  71 {
  72         uint64_t high_bits;
  73
  74         slot->index = slot_index;
  75         slot->name = slot_name;
  76         slot->start_phys_addr = start_phys_addr;
  77         slot->size = size;
  78
  79         setup_hw_slot(qdev, slot);
  80
  81         slot->generation = qdev->rom->slot_generation;
  82         high_bits = (qdev->rom->slots_start + slot->index)
  83                 << qdev->rom->slot_gen_bits;
  84         high_bits |= slot->generation;
  85         high_bits <<= (64 - (qdev->rom->slot_gen_bits + qdev->rom->slot_id_bits));
  86         slot->high_bits = high_bits;
  87
  88         DRM_INFO("slot %d (%s): base 0x%08lx, size 0x%08lx\n",
  89                  slot->index, slot->name,
  90                  (unsigned long)slot->start_phys_addr,
  91                  (unsigned long)slot->size);
  92 }
  93
  94 void qxl_reinit_memslots(struct qxl_device *qdev)
  95 {
  96         setup_hw_slot(qdev, &qdev->main_slot);
  97         setup_hw_slot(qdev, &qdev->surfaces_slot);
  98 }
  99
 100 static void qxl_gc_work(struct work_struct *work)
 101 {
 102         struct qxl_device *qdev = container_of(work, struct qxl_device, gc_work);
 103
 104         qxl_garbage_collect(qdev);
 105 }
 106
 107 int qxl_device_init(struct qxl_device *qdev,
 108                     struct pci_dev *pdev)
 109 {
 110         int r, sb;
 111
 112         pci_set_drvdata(pdev, &qdev->ddev);
 113
 114         mutex_init(&qdev->gem.mutex);
 115         mutex_init(&qdev->update_area_mutex);
 116         mutex_init(&qdev->release_mutex);
 117         mutex_init(&qdev->surf_evict_mutex);
 118         qxl_gem_init(qdev);
 119
 120         qdev->rom_base = pci_resource_start(pdev, 2);
 121         qdev->rom_size = pci_resource_len(pdev, 2);
 122         qdev->vram_base = pci_resource_start(pdev, 0);
 123         qdev->io_base = pci_resource_start(pdev, 3);
 124
 125         qdev->vram_mapping = io_mapping_create_wc(qdev->vram_base, pci_resource_len(pdev, 0));
 126         if (!qdev->vram_mapping) {
 127                 pr_err("Unable to create vram_mapping");
 128                 return -ENOMEM;
 129         }
 130
 131         if (pci_resource_len(pdev, 4) > 0) {
 132                 /* 64bit surface bar present */
 133                 sb = 4;
 134                 qdev->surfaceram_base = pci_resource_start(pdev, sb);
 135                 qdev->surfaceram_size = pci_resource_len(pdev, sb);
 136                 qdev->surface_mapping =
 137                         io_mapping_create_wc(qdev->surfaceram_base,
 138                                              qdev->surfaceram_size);
 139         }
 140         if (qdev->surface_mapping == NULL) {
 141                 /* 64bit surface bar not present (or mapping failed) */
 142                 sb = 1;
 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                 if (!qdev->surface_mapping) {
 149                         pr_err("Unable to create surface_mapping");
 150                         r = -ENOMEM;
 151                         goto vram_mapping_free;
 152                 }
 153         }
 154
 155         DRM_DEBUG_KMS("qxl: vram %llx-%llx(%dM %dk), surface %llx-%llx(%dM %dk, %s)\n",
 156                  (unsigned long long)qdev->vram_base,
 157                  (unsigned long long)pci_resource_end(pdev, 0),
 158                  (int)pci_resource_len(pdev, 0) / 1024 / 1024,
 159                  (int)pci_resource_len(pdev, 0) / 1024,
 160                  (unsigned long long)qdev->surfaceram_base,
 161                  (unsigned long long)pci_resource_end(pdev, sb),
 162                  (int)qdev->surfaceram_size / 1024 / 1024,
 163                  (int)qdev->surfaceram_size / 1024,
 164                  (sb == 4) ? "64bit" : "32bit");
 165
 166         qdev->rom = ioremap_wc(qdev->rom_base, qdev->rom_size);
 167         if (!qdev->rom) {
 168                 pr_err("Unable to ioremap ROM\n");
 169                 r = -ENOMEM;
 170                 goto surface_mapping_free;
 171         }
 172
 173         if (!qxl_check_device(qdev)) {
 174                 r = -ENODEV;
 175                 goto rom_unmap;
 176         }
 177
 178         r = qxl_bo_init(qdev);
 179         if (r) {
 180                 DRM_ERROR("bo init failed %d\n", r);
 181                 goto rom_unmap;
 182         }
 183
 184         qdev->ram_header = ioremap_wc(qdev->vram_base +
 185                                    qdev->rom->ram_header_offset,
 186                                    sizeof(*qdev->ram_header));
 187         if (!qdev->ram_header) {
 188                 DRM_ERROR("Unable to ioremap RAM header\n");
 189                 r = -ENOMEM;
 190                 goto bo_fini;
 191         }
 192
 193         qdev->command_ring = qxl_ring_create(&(qdev->ram_header->cmd_ring_hdr),
 194                                              sizeof(struct qxl_command),
 195                                              QXL_COMMAND_RING_SIZE,
 196                                              qdev->io_base + QXL_IO_NOTIFY_CMD,
 197                                              &qdev->display_event);
 198         if (!qdev->command_ring) {
 199                 DRM_ERROR("Unable to create command ring\n");
 200                 r = -ENOMEM;
 201                 goto ram_header_unmap;
 202         }
 203
 204         qdev->cursor_ring = qxl_ring_create(
 205                                 &(qdev->ram_header->cursor_ring_hdr),
 206                                 sizeof(struct qxl_command),
 207                                 QXL_CURSOR_RING_SIZE,
 208                                 qdev->io_base + QXL_IO_NOTIFY_CURSOR,
 209                                 &qdev->cursor_event);
 210
 211         if (!qdev->cursor_ring) {
 212                 DRM_ERROR("Unable to create cursor ring\n");
 213                 r = -ENOMEM;
 214                 goto command_ring_free;
 215         }
 216
 217         qdev->release_ring = qxl_ring_create(
 218                                 &(qdev->ram_header->release_ring_hdr),
 219                                 sizeof(uint64_t),
 220                                 QXL_RELEASE_RING_SIZE, 0,
 221                                 NULL);
 222
 223         if (!qdev->release_ring) {
 224                 DRM_ERROR("Unable to create release ring\n");
 225                 r = -ENOMEM;
 226                 goto cursor_ring_free;
 227         }
 228
 229         idr_init_base(&qdev->release_idr, 1);
 230         spin_lock_init(&qdev->release_idr_lock);
 231         spin_lock_init(&qdev->release_lock);
 232
 233         idr_init_base(&qdev->surf_id_idr, 1);
 234         spin_lock_init(&qdev->surf_id_idr_lock);
 235
 236         mutex_init(&qdev->async_io_mutex);
 237
 238         /* reset the device into a known state - no memslots, no primary
 239          * created, no surfaces. */
 240         qxl_io_reset(qdev);
 241
 242         /* must initialize irq before first async io - slot creation */
 243         r = qxl_irq_init(qdev);
 244         if (r) {
 245                 DRM_ERROR("Unable to init qxl irq\n");
 246                 goto release_ring_free;
 247         }
 248
 249         /*
 250          * Note that virtual is surface0. We rely on the single ioremap done
 251          * before.
 252          */
 253         setup_slot(qdev, &qdev->main_slot, 0, "main",
 254                    (unsigned long)qdev->vram_base,
 255                    (unsigned long)qdev->rom->ram_header_offset);
 256         setup_slot(qdev, &qdev->surfaces_slot, 1, "surfaces",
 257                    (unsigned long)qdev->surfaceram_base,
 258                    (unsigned long)qdev->surfaceram_size);
 259
 260         INIT_WORK(&qdev->gc_work, qxl_gc_work);
 261
 262         return 0;
 263
 264 release_ring_free:
 265         qxl_ring_free(qdev->release_ring);
 266 cursor_ring_free:
 267         qxl_ring_free(qdev->cursor_ring);
 268 command_ring_free:
 269         qxl_ring_free(qdev->command_ring);
 270 ram_header_unmap:
 271         iounmap(qdev->ram_header);
 272 bo_fini:
 273         qxl_bo_fini(qdev);
 274 rom_unmap:
 275         iounmap(qdev->rom);
 276 surface_mapping_free:
 277         io_mapping_free(qdev->surface_mapping);
 278 vram_mapping_free:
 279         io_mapping_free(qdev->vram_mapping);
 280         return r;
 281 }
 282
 283 void qxl_device_fini(struct qxl_device *qdev)
 284 {
 285         int cur_idx;
 286
 287         /* check if qxl_device_init() was successful (gc_work is initialized last) */
 288         if (!qdev->gc_work.func)
 289                 return;
 290
 291         for (cur_idx = 0; cur_idx < 3; cur_idx++) {
 292                 if (!qdev->current_release_bo[cur_idx])
 293                         continue;
 294                 qxl_bo_unpin(qdev->current_release_bo[cur_idx]);
 295                 qxl_bo_unref(&qdev->current_release_bo[cur_idx]);
 296                 qdev->current_release_bo_offset[cur_idx] = 0;
 297                 qdev->current_release_bo[cur_idx] = NULL;
 298         }
 299
 300         /*
 301          * Ask host to release resources (+fill release ring),
 302          * then wait for the release actually happening.
 303          */
 304         qxl_io_notify_oom(qdev);
 305         wait_event_timeout(qdev->release_event,
 306                            atomic_read(&qdev->release_count) == 0,
 307                            HZ);
 308         flush_work(&qdev->gc_work);
 309         qxl_surf_evict(qdev);
 310         qxl_vram_evict(qdev);
 311
 312         qxl_gem_fini(qdev);
 313         qxl_bo_fini(qdev);
 314         qxl_ring_free(qdev->command_ring);
 315         qxl_ring_free(qdev->cursor_ring);
 316         qxl_ring_free(qdev->release_ring);
 317         io_mapping_free(qdev->surface_mapping);
 318         io_mapping_free(qdev->vram_mapping);
 319         iounmap(qdev->ram_header);
 320         iounmap(qdev->rom);
 321         qdev->rom = NULL;
 322 }