src/gallium/drivers/freedreno/drm/msm_pipe.c

   1 /*
   2  * Copyright (C) 2012-2018 Rob Clark <robclark@freedesktop.org>
   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 (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  *
  23  * Authors:
  24  *    Rob Clark <robclark@freedesktop.org>
  25  */
  26
  27 #include "util/slab.h"
  28
  29 #include "msm_priv.h"
  30
  31 static int query_param(struct fd_pipe *pipe, uint32_t param,
  32                 uint64_t *value)
  33 {
  34         struct msm_pipe *msm_pipe = to_msm_pipe(pipe);
  35         struct drm_msm_param req = {
  36                         .pipe = msm_pipe->pipe,
  37                         .param = param,
  38         };
  39         int ret;
  40
  41         ret = drmCommandWriteRead(pipe->dev->fd, DRM_MSM_GET_PARAM,
  42                         &req, sizeof(req));
  43         if (ret)
  44                 return ret;
  45
  46         *value = req.value;
  47
  48         return 0;
  49 }
  50
  51 static int msm_pipe_get_param(struct fd_pipe *pipe,
  52                 enum fd_param_id param, uint64_t *value)
  53 {
  54         struct msm_pipe *msm_pipe = to_msm_pipe(pipe);
  55         switch(param) {
  56         case FD_DEVICE_ID: // XXX probably get rid of this..
  57         case FD_GPU_ID:
  58                 *value = msm_pipe->gpu_id;
  59                 return 0;
  60         case FD_GMEM_SIZE:
  61                 *value = msm_pipe->gmem;
  62                 return 0;
  63         case FD_CHIP_ID:
  64                 *value = msm_pipe->chip_id;
  65                 return 0;
  66         case FD_MAX_FREQ:
  67                 return query_param(pipe, MSM_PARAM_MAX_FREQ, value);
  68         case FD_TIMESTAMP:
  69                 return query_param(pipe, MSM_PARAM_TIMESTAMP, value);
  70         case FD_NR_RINGS:
  71                 return query_param(pipe, MSM_PARAM_NR_RINGS, value);
  72         default:
  73                 ERROR_MSG("invalid param id: %d", param);
  74                 return -1;
  75         }
  76 }
  77
  78 static int msm_pipe_wait(struct fd_pipe *pipe, uint32_t timestamp,
  79                 uint64_t timeout)
  80 {
  81         struct fd_device *dev = pipe->dev;
  82         struct drm_msm_wait_fence req = {
  83                         .fence = timestamp,
  84                         .queueid = to_msm_pipe(pipe)->queue_id,
  85         };
  86         int ret;
  87
  88         get_abs_timeout(&req.timeout, timeout);
  89
  90         ret = drmCommandWrite(dev->fd, DRM_MSM_WAIT_FENCE, &req, sizeof(req));
  91         if (ret) {
  92                 ERROR_MSG("wait-fence failed! %d (%s)", ret, strerror(errno));
  93                 return ret;
  94         }
  95
  96         return 0;
  97 }
  98
  99 static int open_submitqueue(struct fd_pipe *pipe, uint32_t prio)
 100 {
 101         struct drm_msm_submitqueue req = {
 102                 .flags = 0,
 103                 .prio = prio,
 104         };
 105         uint64_t nr_rings = 1;
 106         int ret;
 107
 108         if (fd_device_version(pipe->dev) < FD_VERSION_SUBMIT_QUEUES) {
 109                 to_msm_pipe(pipe)->queue_id = 0;
 110                 return 0;
 111         }
 112
 113         msm_pipe_get_param(pipe, FD_NR_RINGS, &nr_rings);
 114
 115         req.prio = MIN2(req.prio, MAX2(nr_rings, 1) - 1);
 116
 117         ret = drmCommandWriteRead(pipe->dev->fd, DRM_MSM_SUBMITQUEUE_NEW,
 118                         &req, sizeof(req));
 119         if (ret) {
 120                 ERROR_MSG("could not create submitqueue! %d (%s)", ret, strerror(errno));
 121                 return ret;
 122         }
 123
 124         to_msm_pipe(pipe)->queue_id = req.id;
 125         return 0;
 126 }
 127
 128 static void close_submitqueue(struct fd_pipe *pipe, uint32_t queue_id)
 129 {
 130         if (fd_device_version(pipe->dev) < FD_VERSION_SUBMIT_QUEUES)
 131                 return;
 132
 133         drmCommandWrite(pipe->dev->fd, DRM_MSM_SUBMITQUEUE_CLOSE,
 134                         &queue_id, sizeof(queue_id));
 135 }
 136
 137 static void msm_pipe_destroy(struct fd_pipe *pipe)
 138 {
 139         struct msm_pipe *msm_pipe = to_msm_pipe(pipe);
 140         close_submitqueue(pipe, msm_pipe->queue_id);
 141         free(msm_pipe);
 142 }
 143
 144 static const struct fd_pipe_funcs sp_funcs = {
 145                 .ringbuffer_new_object = msm_ringbuffer_sp_new_object,
 146                 .submit_new = msm_submit_sp_new,
 147                 .get_param = msm_pipe_get_param,
 148                 .wait = msm_pipe_wait,
 149                 .destroy = msm_pipe_destroy,
 150 };
 151
 152 static const struct fd_pipe_funcs legacy_funcs = {
 153                 .ringbuffer_new_object = msm_ringbuffer_new_object,
 154                 .submit_new = msm_submit_new,
 155                 .get_param = msm_pipe_get_param,
 156                 .wait = msm_pipe_wait,
 157                 .destroy = msm_pipe_destroy,
 158 };
 159
 160 static uint64_t get_param(struct fd_pipe *pipe, uint32_t param)
 161 {
 162         uint64_t value;
 163         int ret = query_param(pipe, param, &value);
 164         if (ret) {
 165                 ERROR_MSG("get-param failed! %d (%s)", ret, strerror(errno));
 166                 return 0;
 167         }
 168         return value;
 169 }
 170
 171 static bool use_softpin(void)
 172 {
 173         static int sp = -1;
 174         if (sp < 0) {
 175                 const char *str = getenv("FD_MESA_DEBUG");
 176                 sp = str && strstr(str, "softpin");
 177         }
 178         return sp;
 179 }
 180
 181 struct fd_pipe * msm_pipe_new(struct fd_device *dev,
 182                 enum fd_pipe_id id, uint32_t prio)
 183 {
 184         static const uint32_t pipe_id[] = {
 185                         [FD_PIPE_3D] = MSM_PIPE_3D0,
 186                         [FD_PIPE_2D] = MSM_PIPE_2D0,
 187         };
 188         struct msm_pipe *msm_pipe = NULL;
 189         struct fd_pipe *pipe = NULL;
 190
 191         msm_pipe = calloc(1, sizeof(*msm_pipe));
 192         if (!msm_pipe) {
 193                 ERROR_MSG("allocation failed");
 194                 goto fail;
 195         }
 196
 197         pipe = &msm_pipe->base;
 198
 199         // TODO once kernel changes are in place, this switch will be
 200         // based on kernel version:
 201         if (use_softpin()) {
 202                 pipe->funcs = &sp_funcs;
 203         } else {
 204                 pipe->funcs = &legacy_funcs;
 205         }
 206
 207         /* initialize before get_param(): */
 208         pipe->dev = dev;
 209         msm_pipe->pipe = pipe_id[id];
 210
 211         /* these params should be supported since the first version of drm/msm: */
 212         msm_pipe->gpu_id = get_param(pipe, MSM_PARAM_GPU_ID);
 213         msm_pipe->gmem   = get_param(pipe, MSM_PARAM_GMEM_SIZE);
 214         msm_pipe->chip_id = get_param(pipe, MSM_PARAM_CHIP_ID);
 215
 216         if (! msm_pipe->gpu_id)
 217                 goto fail;
 218
 219         INFO_MSG("Pipe Info:");
 220         INFO_MSG(" GPU-id:          %d", msm_pipe->gpu_id);
 221         INFO_MSG(" Chip-id:         0x%08x", msm_pipe->chip_id);
 222         INFO_MSG(" GMEM size:       0x%08x", msm_pipe->gmem);
 223
 224         if (open_submitqueue(pipe, prio))
 225                 goto fail;
 226
 227         return pipe;
 228 fail:
 229         if (pipe)
 230                 fd_pipe_del(pipe);
 231         return NULL;
 232 }