src/gallium/auxiliary/pipe-loader/pipe_loader_drm.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2011 Intel Corporation
   4  * Copyright 2012 Francisco Jerez
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  * Authors:
  28  *    Kristian Høgsberg <krh@bitplanet.net>
  29  *    Benjamin Franzke <benjaminfranzke@googlemail.com>
  30  *
  31  **************************************************************************/
  32
  33 #include <fcntl.h>
  34 #include <stdio.h>
  35 #include <xf86drm.h>
  36 #include <unistd.h>
  37
  38 #include "loader.h"
  39 #include "target-helpers/drm_helper_public.h"
  40 #include "state_tracker/drm_driver.h"
  41 #include "pipe_loader_priv.h"
  42
  43 #include "util/u_memory.h"
  44 #include "util/u_dl.h"
  45 #include "util/u_debug.h"
  46
  47 #define DRM_RENDER_NODE_DEV_NAME_FORMAT "%s/renderD%d"
  48 #define DRM_RENDER_NODE_MAX_NODES 63
  49 #define DRM_RENDER_NODE_MIN_MINOR 128
  50 #define DRM_RENDER_NODE_MAX_MINOR (DRM_RENDER_NODE_MIN_MINOR + DRM_RENDER_NODE_MAX_NODES)
  51
  52 struct pipe_loader_drm_device {
  53    struct pipe_loader_device base;
  54    const struct drm_driver_descriptor *dd;
  55 #ifndef GALLIUM_STATIC_TARGETS
  56    struct util_dl_library *lib;
  57 #endif
  58    int fd;
  59 };
  60
  61 #define pipe_loader_drm_device(dev) ((struct pipe_loader_drm_device *)dev)
  62
  63 static const struct pipe_loader_ops pipe_loader_drm_ops;
  64
  65 #ifdef GALLIUM_STATIC_TARGETS
  66 static const struct drm_conf_ret throttle_ret = {
  67    DRM_CONF_INT,
  68    {2},
  69 };
  70
  71 static const struct drm_conf_ret share_fd_ret = {
  72    DRM_CONF_BOOL,
  73    {true},
  74 };
  75
  76 static inline const struct drm_conf_ret *
  77 configuration_query(enum drm_conf conf)
  78 {
  79    switch (conf) {
  80    case DRM_CONF_THROTTLE:
  81       return &throttle_ret;
  82    case DRM_CONF_SHARE_FD:
  83       return &share_fd_ret;
  84    default:
  85       break;
  86    }
  87    return NULL;
  88 }
  89
  90 static const struct drm_driver_descriptor driver_descriptors[] = {
  91     {
  92         .driver_name = "i915",
  93         .create_screen = pipe_i915_create_screen,
  94         .configuration = configuration_query,
  95     },
  96 #ifdef USE_VC4_SIMULATOR
  97     /* VC4 simulator and ILO (i965) are mutually exclusive (error at
  98      * configure). As the latter is unconditionally added, keep this one above
  99      * it.
 100      */
 101     {
 102         .driver_name = "i965",
 103         .create_screen = pipe_vc4_create_screen,
 104         .configuration = configuration_query,
 105     },
 106 #endif
 107     {
 108         .driver_name = "i965",
 109         .create_screen = pipe_ilo_create_screen,
 110         .configuration = configuration_query,
 111     },
 112     {
 113         .driver_name = "nouveau",
 114         .create_screen = pipe_nouveau_create_screen,
 115         .configuration = configuration_query,
 116     },
 117     {
 118         .driver_name = "r300",
 119         .create_screen = pipe_r300_create_screen,
 120         .configuration = configuration_query,
 121     },
 122     {
 123         .driver_name = "r600",
 124         .create_screen = pipe_r600_create_screen,
 125         .configuration = configuration_query,
 126     },
 127     {
 128         .driver_name = "radeonsi",
 129         .create_screen = pipe_radeonsi_create_screen,
 130         .configuration = configuration_query,
 131     },
 132     {
 133         .driver_name = "vmwgfx",
 134         .create_screen = pipe_vmwgfx_create_screen,
 135         .configuration = configuration_query,
 136     },
 137     {
 138         .driver_name = "kgsl",
 139         .create_screen = pipe_freedreno_create_screen,
 140         .configuration = configuration_query,
 141     },
 142     {
 143         .driver_name = "msm",
 144         .create_screen = pipe_freedreno_create_screen,
 145         .configuration = configuration_query,
 146     },
 147     {
 148         .driver_name = "virtio_gpu",
 149         .create_screen = pipe_virgl_create_screen,
 150         .configuration = configuration_query,
 151     },
 152     {
 153         .driver_name = "vc4",
 154         .create_screen = pipe_vc4_create_screen,
 155         .configuration = configuration_query,
 156     },
 157 };
 158 #endif
 159
 160 bool
 161 pipe_loader_drm_probe_fd(struct pipe_loader_device **dev, int fd)
 162 {
 163    struct pipe_loader_drm_device *ddev = CALLOC_STRUCT(pipe_loader_drm_device);
 164    int vendor_id, chip_id;
 165
 166    if (!ddev)
 167       return false;
 168
 169    if (loader_get_pci_id_for_fd(fd, &vendor_id, &chip_id)) {
 170       ddev->base.type = PIPE_LOADER_DEVICE_PCI;
 171       ddev->base.u.pci.vendor_id = vendor_id;
 172       ddev->base.u.pci.chip_id = chip_id;
 173    } else {
 174       ddev->base.type = PIPE_LOADER_DEVICE_PLATFORM;
 175    }
 176    ddev->base.ops = &pipe_loader_drm_ops;
 177    ddev->fd = fd;
 178
 179    ddev->base.driver_name = loader_get_driver_for_fd(fd);
 180    if (!ddev->base.driver_name)
 181       goto fail;
 182
 183 #ifdef GALLIUM_STATIC_TARGETS
 184    for (int i = 0; i < ARRAY_SIZE(driver_descriptors); i++) {
 185       if (strcmp(driver_descriptors[i].driver_name, ddev->base.driver_name) == 0) {
 186          ddev->dd = &driver_descriptors[i];
 187          break;
 188       }
 189    }
 190    if (!ddev->dd)
 191       goto fail;
 192 #else
 193    ddev->lib = pipe_loader_find_module(&ddev->base, PIPE_SEARCH_DIR);
 194    if (!ddev->lib)
 195       goto fail;
 196
 197    ddev->dd = (const struct drm_driver_descriptor *)
 198       util_dl_get_proc_address(ddev->lib, "driver_descriptor");
 199
 200    /* sanity check on the driver name */
 201    if (!ddev->dd || strcmp(ddev->dd->driver_name, ddev->base.driver_name) != 0)
 202       goto fail;
 203 #endif
 204
 205    *dev = &ddev->base;
 206    return true;
 207
 208   fail:
 209 #ifndef GALLIUM_STATIC_TARGETS
 210    if (ddev->lib)
 211       util_dl_close(ddev->lib);
 212 #endif
 213    FREE(ddev);
 214    return false;
 215 }
 216
 217 static int
 218 open_drm_render_node_minor(int minor)
 219 {
 220    char path[PATH_MAX];
 221    snprintf(path, sizeof(path), DRM_RENDER_NODE_DEV_NAME_FORMAT, DRM_DIR_NAME,
 222             minor);
 223    return loader_open_device(path);
 224 }
 225
 226 int
 227 pipe_loader_drm_probe(struct pipe_loader_device **devs, int ndev)
 228 {
 229    int i, j, fd;
 230
 231    for (i = DRM_RENDER_NODE_MIN_MINOR, j = 0;
 232         i <= DRM_RENDER_NODE_MAX_MINOR; i++) {
 233       struct pipe_loader_device *dev;
 234
 235       fd = open_drm_render_node_minor(i);
 236       if (fd < 0)
 237          continue;
 238
 239       if (!pipe_loader_drm_probe_fd(&dev, fd)) {
 240          close(fd);
 241          continue;
 242       }
 243
 244       if (j < ndev) {
 245          devs[j] = dev;
 246       } else {
 247          close(fd);
 248          dev->ops->release(&dev);
 249       }
 250       j++;
 251    }
 252
 253    return j;
 254 }
 255
 256 static void
 257 pipe_loader_drm_release(struct pipe_loader_device **dev)
 258 {
 259    struct pipe_loader_drm_device *ddev = pipe_loader_drm_device(*dev);
 260
 261 #ifndef GALLIUM_STATIC_TARGETS
 262    if (ddev->lib)
 263       util_dl_close(ddev->lib);
 264 #endif
 265
 266    close(ddev->fd);
 267    FREE(ddev->base.driver_name);
 268    FREE(ddev);
 269    *dev = NULL;
 270 }
 271
 272 static const struct drm_conf_ret *
 273 pipe_loader_drm_configuration(struct pipe_loader_device *dev,
 274                               enum drm_conf conf)
 275 {
 276    struct pipe_loader_drm_device *ddev = pipe_loader_drm_device(dev);
 277
 278    if (!ddev->dd->configuration)
 279       return NULL;
 280
 281    return ddev->dd->configuration(conf);
 282 }
 283
 284 static struct pipe_screen *
 285 pipe_loader_drm_create_screen(struct pipe_loader_device *dev)
 286 {
 287    struct pipe_loader_drm_device *ddev = pipe_loader_drm_device(dev);
 288
 289    return ddev->dd->create_screen(ddev->fd);
 290 }
 291
 292 static const struct pipe_loader_ops pipe_loader_drm_ops = {
 293    .create_screen = pipe_loader_drm_create_screen,
 294    .configuration = pipe_loader_drm_configuration,
 295    .release = pipe_loader_drm_release
 296 };