src/freedreno/vulkan/tu_drm.c

   1 /*
   2  * Copyright © 2018 Google, Inc.
   3  * Copyright © 2015 Intel Corporation
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 #include "tu_private.h"
  26
  27 #include "xf86drm.h"
  28 #include <errno.h>
  29 #include <msm_drm.h>
  30 #include <stdint.h>
  31 #include <sys/ioctl.h>
  32
  33 /**
  34  * Return gem handle on success. Return 0 on failure.
  35  */
  36 uint32_t
  37 tu_gem_new(struct tu_device *dev, uint64_t size, uint32_t flags)
  38 {
  39    struct drm_msm_gem_new req = {
  40       .size = size,
  41       .flags = flags,
  42    };
  43
  44    int ret = drmCommandWriteRead(dev->physical_device->local_fd,
  45                                  DRM_MSM_GEM_NEW, &req, sizeof(req));
  46    if (ret)
  47       return 0;
  48
  49    return req.handle;
  50 }
  51
  52 void
  53 tu_gem_close(struct tu_device *dev, uint32_t gem_handle)
  54 {
  55    struct drm_gem_close req = {
  56       .handle = gem_handle,
  57    };
  58
  59    drmIoctl(dev->physical_device->local_fd, DRM_IOCTL_GEM_CLOSE, &req);
  60 }
  61
  62 /** Return UINT64_MAX on error. */
  63 static uint64_t
  64 tu_gem_info(struct tu_device *dev, uint32_t gem_handle, uint32_t flags)
  65 {
  66    struct drm_msm_gem_info req = {
  67       .handle = gem_handle,
  68       .flags = flags,
  69    };
  70
  71    int ret = drmCommandWriteRead(dev->physical_device->local_fd,
  72                                  DRM_MSM_GEM_INFO, &req, sizeof(req));
  73    if (ret == -1)
  74       return UINT64_MAX;
  75
  76    return req.offset;
  77 }
  78
  79 /** Return UINT64_MAX on error. */
  80 uint64_t
  81 tu_gem_info_offset(struct tu_device *dev, uint32_t gem_handle)
  82 {
  83    return tu_gem_info(dev, gem_handle, 0);
  84 }
  85
  86 /** Return UINT64_MAX on error. */
  87 uint64_t
  88 tu_gem_info_iova(struct tu_device *dev, uint32_t gem_handle)
  89 {
  90    return tu_gem_info(dev, gem_handle, MSM_INFO_IOVA);
  91 }
  92
  93 int
  94 tu_drm_query_param(struct tu_physical_device *dev,
  95                    uint32_t param,
  96                    uint64_t *value)
  97 {
  98    /* Technically this requires a pipe, but the kernel only supports one pipe
  99     * anyway at the time of writing and most of these are clearly pipe
 100     * independent. */
 101    struct drm_msm_param req = {
 102       .pipe = MSM_PIPE_3D0,
 103       .param = param,
 104    };
 105
 106    int ret = drmCommandWriteRead(dev->local_fd, DRM_MSM_GET_PARAM, &req,
 107                                  sizeof(req));
 108    if (ret)
 109       return ret;
 110
 111    *value = req.value;
 112
 113    return 0;
 114 }