freedreno/freedreno_ringbuffer.c

   1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
   2
   3 /*
   4  * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  * Authors:
  26  *    Rob Clark <robclark@freedesktop.org>
  27  */
  28
  29 #include "freedreno_drmif.h"
  30 #include "freedreno_priv.h"
  31 #include "freedreno_ringbuffer.h"
  32
  33
  34 /* because kgsl tries to validate the gpuaddr on kernel side in ISSUEIBCMDS,
  35  * we can't use normal gem bo's for ringbuffer..  someday the kernel part
  36  * needs to be reworked into a single sane drm driver :-/
  37  */
  38 struct fd_rb_bo {
  39         struct fd_pipe *pipe;
  40         void    *hostptr;
  41         uint32_t gpuaddr;
  42         uint32_t size;
  43 };
  44
  45 struct fd_ringmarker {
  46         struct fd_ringbuffer *ring;
  47         uint32_t *cur;
  48 };
  49
  50 static void fd_rb_bo_del(struct fd_rb_bo *bo)
  51 {
  52         struct kgsl_sharedmem_free req = {
  53                         .gpuaddr = bo->gpuaddr,
  54         };
  55         int ret;
  56
  57         munmap(bo->hostptr, bo->size);
  58
  59         ret = ioctl(bo->pipe->fd, IOCTL_KGSL_SHAREDMEM_FREE, &req);
  60         if (ret) {
  61                 ERROR_MSG("sharedmem free failed: %s", strerror(errno));
  62         }
  63
  64         free(bo);
  65 }
  66
  67 static struct fd_rb_bo * fd_rb_bo_new(struct fd_pipe *pipe, uint32_t size)
  68 {
  69         struct fd_rb_bo *bo;
  70         struct kgsl_gpumem_alloc req = {
  71                         .size = ALIGN(size, 4096),
  72                         .flags = KGSL_MEMFLAGS_GPUREADONLY,
  73         };
  74         int ret;
  75
  76         bo = calloc(1, sizeof(*bo));
  77         if (!bo) {
  78                 ERROR_MSG("allocation failed");
  79                 return NULL;
  80         }
  81         ret = ioctl(pipe->fd, IOCTL_KGSL_GPUMEM_ALLOC, &req);
  82         if (ret) {
  83                 ERROR_MSG("gpumem allocation failed: %s", strerror(errno));
  84                 goto fail;
  85         }
  86
  87         bo->pipe = pipe;
  88         bo->gpuaddr = req.gpuaddr;
  89         bo->size = size;
  90         bo->hostptr = mmap(NULL, size, PROT_WRITE|PROT_READ,
  91                                 MAP_SHARED, pipe->fd, req.gpuaddr);
  92
  93         return bo;
  94 fail:
  95         if (bo)
  96                 fd_rb_bo_del(bo);
  97         return NULL;
  98 }
  99
 100 struct fd_ringbuffer * fd_ringbuffer_new(struct fd_pipe *pipe,
 101                 uint32_t size)
 102 {
 103         struct fd_ringbuffer *ring = NULL;
 104
 105         ring = calloc(1, sizeof(*ring));
 106         if (!ring) {
 107                 ERROR_MSG("allocation failed");
 108                 goto fail;
 109         }
 110
 111         ring->bo = fd_rb_bo_new(pipe, size);
 112         if (!ring->bo) {
 113                 ERROR_MSG("ringbuffer allocation failed");
 114                 goto fail;
 115         }
 116
 117         ring->size = size;
 118         ring->pipe = pipe;
 119         ring->start = ring->bo->hostptr;
 120         ring->end = &(ring->start[size/4]);
 121
 122         ring->cur = ring->last_start = ring->start;
 123
 124         return ring;
 125 fail:
 126         if (ring)
 127                 fd_ringbuffer_del(ring);
 128         return NULL;
 129 }
 130
 131 void fd_ringbuffer_del(struct fd_ringbuffer *ring)
 132 {
 133         if (ring->bo)
 134                 fd_rb_bo_del(ring->bo);
 135         free(ring);
 136 }
 137
 138 void fd_ringbuffer_reset(struct fd_ringbuffer *ring)
 139 {
 140         uint32_t *start = ring->start;
 141         if (ring->pipe->id == FD_PIPE_2D)
 142                 start = &ring->start[0x140];
 143         ring->cur = ring->last_start = start;
 144 }
 145
 146 static int flush_impl(struct fd_ringbuffer *ring, uint32_t *last_start)
 147 {
 148         uint32_t offset = (uint8_t *)last_start - (uint8_t *)ring->start;
 149         struct kgsl_ibdesc ibdesc = {
 150                         .gpuaddr     = ring->bo->gpuaddr + offset,
 151                         .hostptr     = last_start,
 152                         .sizedwords  = ring->cur - last_start,
 153         };
 154         struct kgsl_ringbuffer_issueibcmds req = {
 155                         .drawctxt_id = ring->pipe->drawctxt_id,
 156                         .ibdesc_addr = (unsigned long)&ibdesc,
 157                         .numibs      = 1,
 158                         .flags       = KGSL_CONTEXT_SUBMIT_IB_LIST,
 159         };
 160         int ret;
 161
 162         /* z180_cmdstream_issueibcmds() is made of fail: */
 163         if (ring->pipe->id == FD_PIPE_2D) {
 164                 /* fix up size field in last cmd packet */
 165                 uint32_t last_size = (uint32_t)(ring->cur - last_start);
 166                 /* 5 is length of first packet, 2 for the two 7f000000's */
 167                 last_start[2] = last_size - (5 + 2);
 168                 ibdesc.gpuaddr = ring->bo->gpuaddr;
 169                 ibdesc.hostptr = ring->bo->hostptr;
 170                 ibdesc.sizedwords = 0x145;
 171                 req.timestamp = (uint32_t)ring->bo->hostptr;
 172         }
 173
 174         do {
 175                 ret = ioctl(ring->pipe->fd, IOCTL_KGSL_RINGBUFFER_ISSUEIBCMDS, &req);
 176         } while ((ret == -1) && ((errno == EINTR) || (errno == EAGAIN)));
 177         if (ret)
 178                 ERROR_MSG("issueibcmds failed!  %d (%s)", ret, strerror(errno));
 179
 180         ring->last_timestamp = req.timestamp;
 181         ring->last_start = ring->cur;
 182
 183         fd_pipe_process_submit(ring->pipe, req.timestamp);
 184
 185         return ret;
 186 }
 187
 188 /* maybe get rid of this and use fd_ringmarker_flush() from DDX too? */
 189 int fd_ringbuffer_flush(struct fd_ringbuffer *ring)
 190 {
 191         return flush_impl(ring, ring->last_start);
 192 }
 193
 194 uint32_t fd_ringbuffer_timestamp(struct fd_ringbuffer *ring)
 195 {
 196         return ring->last_timestamp;
 197 }
 198
 199 void fd_ringbuffer_emit_reloc(struct fd_ringbuffer *ring,
 200                 struct fd_bo *bo, uint32_t offset, uint32_t or)
 201 {
 202         (*ring->cur++) = fd_bo_gpuaddr(bo, offset) | or;
 203         fd_pipe_add_submit(ring->pipe, bo);
 204 }
 205
 206 void fd_ringbuffer_emit_reloc_ring(struct fd_ringbuffer *ring,
 207                 struct fd_ringmarker *target)
 208 {
 209         (*ring->cur++) = target->ring->bo->gpuaddr +
 210                         (uint8_t *)target->cur - (uint8_t *)target->ring->start;
 211 }
 212
 213 struct fd_ringmarker * fd_ringmarker_new(struct fd_ringbuffer *ring)
 214 {
 215         struct fd_ringmarker *marker = NULL;
 216
 217         marker = calloc(1, sizeof(*marker));
 218         if (!marker) {
 219                 ERROR_MSG("allocation failed");
 220                 return NULL;
 221         }
 222
 223         marker->ring = ring;
 224
 225         fd_ringmarker_mark(marker);
 226
 227         return marker;
 228 }
 229
 230 void fd_ringmarker_del(struct fd_ringmarker *marker)
 231 {
 232         free(marker);
 233 }
 234
 235 void fd_ringmarker_mark(struct fd_ringmarker *marker)
 236 {
 237         marker->cur = marker->ring->cur;
 238 }
 239
 240 uint32_t fd_ringmarker_dwords(struct fd_ringmarker *start,
 241                 struct fd_ringmarker *end)
 242 {
 243         return end->cur - start->cur;
 244 }
 245
 246 int fd_ringmarker_flush(struct fd_ringmarker *marker)
 247 {
 248         return flush_impl(marker->ring, marker->cur);
 249 }