1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */ 2 3 /* 4 * Copyright (C) 2013 Rob Clark <robclark (at) 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 (at) freedesktop.org> 27 */ 28 29 #ifdef HAVE_CONFIG_H 30 # include <config.h> 31 #endif 32 33 #include <assert.h> 34 35 #include "freedreno_ringbuffer.h" 36 #include "kgsl_priv.h" 37 38 39 /* because kgsl tries to validate the gpuaddr on kernel side in ISSUEIBCMDS, 40 * we can't use normal gem bo's for ringbuffer.. someday the kernel part 41 * needs to be reworked into a single sane drm driver :-/ 42 */ 43 struct kgsl_rb_bo { 44 struct kgsl_pipe *pipe; 45 void *hostptr; 46 uint32_t gpuaddr; 47 uint32_t size; 48 }; 49 50 struct kgsl_ringbuffer { 51 struct fd_ringbuffer base; 52 struct kgsl_rb_bo *bo; 53 }; 54 55 static inline struct kgsl_ringbuffer * to_kgsl_ringbuffer(struct fd_ringbuffer *x) 56 { 57 return (struct kgsl_ringbuffer *)x; 58 } 59 60 static void kgsl_rb_bo_del(struct kgsl_rb_bo *bo) 61 { 62 struct kgsl_sharedmem_free req = { 63 .gpuaddr = bo->gpuaddr, 64 }; 65 int ret; 66 67 drm_munmap(bo->hostptr, bo->size); 68 69 ret = ioctl(bo->pipe->fd, IOCTL_KGSL_SHAREDMEM_FREE, &req); 70 if (ret) { 71 ERROR_MSG("sharedmem free failed: %s", strerror(errno)); 72 } 73 74 free(bo); 75 } 76 77 static struct kgsl_rb_bo * kgsl_rb_bo_new(struct kgsl_pipe *pipe, uint32_t size) 78 { 79 struct kgsl_rb_bo *bo; 80 struct kgsl_gpumem_alloc req = { 81 .size = ALIGN(size, 4096), 82 .flags = KGSL_MEMFLAGS_GPUREADONLY, 83 }; 84 int ret; 85 86 bo = calloc(1, sizeof(*bo)); 87 if (!bo) { 88 ERROR_MSG("allocation failed"); 89 return NULL; 90 } 91 ret = ioctl(pipe->fd, IOCTL_KGSL_GPUMEM_ALLOC, &req); 92 if (ret) { 93 ERROR_MSG("gpumem allocation failed: %s", strerror(errno)); 94 goto fail; 95 } 96 97 bo->pipe = pipe; 98 bo->gpuaddr = req.gpuaddr; 99 bo->size = size; 100 bo->hostptr = drm_mmap(NULL, size, PROT_WRITE|PROT_READ, 101 MAP_SHARED, pipe->fd, req.gpuaddr); 102 103 return bo; 104 fail: 105 if (bo) 106 kgsl_rb_bo_del(bo); 107 return NULL; 108 } 109 110 static void * kgsl_ringbuffer_hostptr(struct fd_ringbuffer *ring) 111 { 112 struct kgsl_ringbuffer *kgsl_ring = to_kgsl_ringbuffer(ring); 113 return kgsl_ring->bo->hostptr; 114 } 115 116 static int kgsl_ringbuffer_flush(struct fd_ringbuffer *ring, uint32_t *last_start) 117 { 118 struct kgsl_ringbuffer *kgsl_ring = to_kgsl_ringbuffer(ring); 119 struct kgsl_pipe *kgsl_pipe = to_kgsl_pipe(ring->pipe); 120 uint32_t offset = (uint8_t *)last_start - (uint8_t *)ring->start; 121 struct kgsl_ibdesc ibdesc = { 122 .gpuaddr = kgsl_ring->bo->gpuaddr + offset, 123 .hostptr = last_start, 124 .sizedwords = ring->cur - last_start, 125 }; 126 struct kgsl_ringbuffer_issueibcmds req = { 127 .drawctxt_id = kgsl_pipe->drawctxt_id, 128 .ibdesc_addr = (unsigned long)&ibdesc, 129 .numibs = 1, 130 .flags = KGSL_CONTEXT_SUBMIT_IB_LIST, 131 }; 132 int ret; 133 134 kgsl_pipe_pre_submit(kgsl_pipe); 135 136 /* z180_cmdstream_issueibcmds() is made of fail: */ 137 if (ring->pipe->id == FD_PIPE_2D) { 138 /* fix up size field in last cmd packet */ 139 uint32_t last_size = (uint32_t)(ring->cur - last_start); 140 /* 5 is length of first packet, 2 for the two 7f000000's */ 141 last_start[2] = last_size - (5 + 2); 142 ibdesc.gpuaddr = kgsl_ring->bo->gpuaddr; 143 ibdesc.hostptr = kgsl_ring->bo->hostptr; 144 ibdesc.sizedwords = 0x145; 145 req.timestamp = (uint32_t)kgsl_ring->bo->hostptr; 146 } 147 148 do { 149 ret = ioctl(kgsl_pipe->fd, IOCTL_KGSL_RINGBUFFER_ISSUEIBCMDS, &req); 150 } while ((ret == -1) && ((errno == EINTR) || (errno == EAGAIN))); 151 if (ret) 152 ERROR_MSG("issueibcmds failed! %d (%s)", ret, strerror(errno)); 153 154 ring->last_timestamp = req.timestamp; 155 ring->last_start = ring->cur; 156 157 kgsl_pipe_post_submit(kgsl_pipe, req.timestamp); 158 159 return ret; 160 } 161 162 static void kgsl_ringbuffer_emit_reloc(struct fd_ringbuffer *ring, 163 const struct fd_reloc *r) 164 { 165 struct kgsl_bo *kgsl_bo = to_kgsl_bo(r->bo); 166 uint32_t addr = kgsl_bo_gpuaddr(kgsl_bo, r->offset); 167 assert(addr); 168 if (r->shift < 0) 169 addr >>= -r->shift; 170 else 171 addr <<= r->shift; 172 (*ring->cur++) = addr | r->or; 173 kgsl_pipe_add_submit(to_kgsl_pipe(ring->pipe), kgsl_bo); 174 } 175 176 static void kgsl_ringbuffer_emit_reloc_ring(struct fd_ringbuffer *ring, 177 struct fd_ringmarker *target, struct fd_ringmarker *end) 178 { 179 struct kgsl_ringbuffer *target_ring = to_kgsl_ringbuffer(target->ring); 180 (*ring->cur++) = target_ring->bo->gpuaddr + 181 (uint8_t *)target->cur - (uint8_t *)target->ring->start; 182 } 183 184 static void kgsl_ringbuffer_destroy(struct fd_ringbuffer *ring) 185 { 186 struct kgsl_ringbuffer *kgsl_ring = to_kgsl_ringbuffer(ring); 187 if (ring->last_timestamp) 188 fd_pipe_wait(ring->pipe, ring->last_timestamp); 189 if (kgsl_ring->bo) 190 kgsl_rb_bo_del(kgsl_ring->bo); 191 free(kgsl_ring); 192 } 193 194 static const struct fd_ringbuffer_funcs funcs = { 195 .hostptr = kgsl_ringbuffer_hostptr, 196 .flush = kgsl_ringbuffer_flush, 197 .emit_reloc = kgsl_ringbuffer_emit_reloc, 198 .emit_reloc_ring = kgsl_ringbuffer_emit_reloc_ring, 199 .destroy = kgsl_ringbuffer_destroy, 200 }; 201 202 drm_private struct fd_ringbuffer * kgsl_ringbuffer_new(struct fd_pipe *pipe, 203 uint32_t size) 204 { 205 struct kgsl_ringbuffer *kgsl_ring; 206 struct fd_ringbuffer *ring = NULL; 207 208 kgsl_ring = calloc(1, sizeof(*kgsl_ring)); 209 if (!kgsl_ring) { 210 ERROR_MSG("allocation failed"); 211 goto fail; 212 } 213 214 ring = &kgsl_ring->base; 215 ring->funcs = &funcs; 216 217 kgsl_ring->bo = kgsl_rb_bo_new(to_kgsl_pipe(pipe), size); 218 if (!kgsl_ring->bo) { 219 ERROR_MSG("ringbuffer allocation failed"); 220 goto fail; 221 } 222 223 return ring; 224 fail: 225 if (ring) 226 fd_ringbuffer_del(ring); 227 return NULL; 228 } 229
