1 /* 2 * Copyright (C) 2013 Red Hat 3 * Author: Rob Clark <robdclark@gmail.com> 4 * 5 * Copyright (c) 2014 The Linux Foundation. All rights reserved. 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License version 2 as published by 9 * the Free Software Foundation. 10 * 11 * This program is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 14 * more details. 15 * 16 * You should have received a copy of the GNU General Public License along with 17 * this program. If not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include "adreno_gpu.h" 21 #include "msm_gem.h" 22 #include "msm_mmu.h" 23 24 #define RB_SIZE SZ_32K 25 #define RB_BLKSIZE 16 26 27 int adreno_get_param(struct msm_gpu *gpu, uint32_t param, uint64_t *value) 28 { 29 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); 30 31 switch (param) { 32 case MSM_PARAM_GPU_ID: 33 *value = adreno_gpu->info->revn; 34 return 0; 35 case MSM_PARAM_GMEM_SIZE: 36 *value = adreno_gpu->gmem; 37 return 0; 38 case MSM_PARAM_CHIP_ID: 39 *value = adreno_gpu->rev.patchid | 40 (adreno_gpu->rev.minor << 8) | 41 (adreno_gpu->rev.major << 16) | 42 (adreno_gpu->rev.core << 24); 43 return 0; 44 case MSM_PARAM_MAX_FREQ: 45 *value = adreno_gpu->base.fast_rate; 46 return 0; 47 case MSM_PARAM_TIMESTAMP: 48 if (adreno_gpu->funcs->get_timestamp) 49 return adreno_gpu->funcs->get_timestamp(gpu, value); 50 return -EINVAL; 51 default: 52 DBG("%s: invalid param: %u", gpu->name, param); 53 return -EINVAL; 54 } 55 } 56 57 #define rbmemptr(adreno_gpu, member) \ 58 ((adreno_gpu)->memptrs_iova + offsetof(struct adreno_rbmemptrs, member)) 59 60 int adreno_hw_init(struct msm_gpu *gpu) 61 { 62 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); 63 int ret; 64 65 DBG("%s", gpu->name); 66 67 ret = msm_gem_get_iova(gpu->rb->bo, gpu->id, &gpu->rb_iova); 68 if (ret) { 69 gpu->rb_iova = 0; 70 dev_err(gpu->dev->dev, "could not map ringbuffer: %d\n", ret); 71 return ret; 72 } 73 74 /* Setup REG_CP_RB_CNTL: */ 75 adreno_gpu_write(adreno_gpu, REG_ADRENO_CP_RB_CNTL, 76 /* size is log2(quad-words): */ 77 AXXX_CP_RB_CNTL_BUFSZ(ilog2(gpu->rb->size / 8)) | 78 AXXX_CP_RB_CNTL_BLKSZ(ilog2(RB_BLKSIZE / 8)) | 79 (adreno_is_a430(adreno_gpu) ? AXXX_CP_RB_CNTL_NO_UPDATE : 0)); 80 81 /* Setup ringbuffer address: */ 82 adreno_gpu_write(adreno_gpu, REG_ADRENO_CP_RB_BASE, gpu->rb_iova); 83 84 if (!adreno_is_a430(adreno_gpu)) 85 adreno_gpu_write(adreno_gpu, REG_ADRENO_CP_RB_RPTR_ADDR, 86 rbmemptr(adreno_gpu, rptr)); 87 88 return 0; 89 } 90 91 static uint32_t get_wptr(struct msm_ringbuffer *ring) 92 { 93 return ring->cur - ring->start; 94 } 95 96 /* Use this helper to read rptr, since a430 doesn't update rptr in memory */ 97 static uint32_t get_rptr(struct adreno_gpu *adreno_gpu) 98 { 99 if (adreno_is_a430(adreno_gpu)) 100 return adreno_gpu->memptrs->rptr = adreno_gpu_read( 101 adreno_gpu, REG_ADRENO_CP_RB_RPTR); 102 else 103 return adreno_gpu->memptrs->rptr; 104 } 105 106 uint32_t adreno_last_fence(struct msm_gpu *gpu) 107 { 108 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); 109 return adreno_gpu->memptrs->fence; 110 } 111 112 void adreno_recover(struct msm_gpu *gpu) 113 { 114 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); 115 struct drm_device *dev = gpu->dev; 116 int ret; 117 118 gpu->funcs->pm_suspend(gpu); 119 120 /* reset ringbuffer: */ 121 gpu->rb->cur = gpu->rb->start; 122 123 /* reset completed fence seqno, just discard anything pending: */ 124 adreno_gpu->memptrs->fence = gpu->submitted_fence; 125 adreno_gpu->memptrs->rptr = 0; 126 adreno_gpu->memptrs->wptr = 0; 127 128 gpu->funcs->pm_resume(gpu); 129 ret = gpu->funcs->hw_init(gpu); 130 if (ret) { 131 dev_err(dev->dev, "gpu hw init failed: %d\n", ret); 132 /* hmm, oh well? */ 133 } 134 } 135 136 int adreno_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit, 137 struct msm_file_private *ctx) 138 { 139 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); 140 struct msm_drm_private *priv = gpu->dev->dev_private; 141 struct msm_ringbuffer *ring = gpu->rb; 142 unsigned i, ibs = 0; 143 144 for (i = 0; i < submit->nr_cmds; i++) { 145 switch (submit->cmd[i].type) { 146 case MSM_SUBMIT_CMD_IB_TARGET_BUF: 147 /* ignore IB-targets */ 148 break; 149 case MSM_SUBMIT_CMD_CTX_RESTORE_BUF: 150 /* ignore if there has not been a ctx switch: */ 151 if (priv->lastctx == ctx) 152 break; 153 case MSM_SUBMIT_CMD_BUF: 154 OUT_PKT3(ring, adreno_is_a430(adreno_gpu) ? 155 CP_INDIRECT_BUFFER_PFE : CP_INDIRECT_BUFFER_PFD, 2); 156 OUT_RING(ring, submit->cmd[i].iova); 157 OUT_RING(ring, submit->cmd[i].size); 158 ibs++; 159 break; 160 } 161 } 162 163 /* on a320, at least, we seem to need to pad things out to an 164 * even number of qwords to avoid issue w/ CP hanging on wrap- 165 * around: 166 */ 167 if (ibs % 2) 168 OUT_PKT2(ring); 169 170 OUT_PKT0(ring, REG_AXXX_CP_SCRATCH_REG2, 1); 171 OUT_RING(ring, submit->fence); 172 173 if (adreno_is_a3xx(adreno_gpu) || adreno_is_a4xx(adreno_gpu)) { 174 /* Flush HLSQ lazy updates to make sure there is nothing 175 * pending for indirect loads after the timestamp has 176 * passed: 177 */ 178 OUT_PKT3(ring, CP_EVENT_WRITE, 1); 179 OUT_RING(ring, HLSQ_FLUSH); 180 181 OUT_PKT3(ring, CP_WAIT_FOR_IDLE, 1); 182 OUT_RING(ring, 0x00000000); 183 } 184 185 OUT_PKT3(ring, CP_EVENT_WRITE, 3); 186 OUT_RING(ring, CACHE_FLUSH_TS); 187 OUT_RING(ring, rbmemptr(adreno_gpu, fence)); 188 OUT_RING(ring, submit->fence); 189 190 /* we could maybe be clever and only CP_COND_EXEC the interrupt: */ 191 OUT_PKT3(ring, CP_INTERRUPT, 1); 192 OUT_RING(ring, 0x80000000); 193 194 /* Workaround for missing irq issue on 8x16/a306. Unsure if the 195 * root cause is a platform issue or some a306 quirk, but this 196 * keeps things humming along: 197 */ 198 if (adreno_is_a306(adreno_gpu)) { 199 OUT_PKT3(ring, CP_WAIT_FOR_IDLE, 1); 200 OUT_RING(ring, 0x00000000); 201 OUT_PKT3(ring, CP_INTERRUPT, 1); 202 OUT_RING(ring, 0x80000000); 203 } 204 205 #if 0 206 if (adreno_is_a3xx(adreno_gpu)) { 207 /* Dummy set-constant to trigger context rollover */ 208 OUT_PKT3(ring, CP_SET_CONSTANT, 2); 209 OUT_RING(ring, CP_REG(REG_A3XX_HLSQ_CL_KERNEL_GROUP_X_REG)); 210 OUT_RING(ring, 0x00000000); 211 } 212 #endif 213 214 gpu->funcs->flush(gpu); 215 216 return 0; 217 } 218 219 void adreno_flush(struct msm_gpu *gpu) 220 { 221 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); 222 uint32_t wptr = get_wptr(gpu->rb); 223 224 /* ensure writes to ringbuffer have hit system memory: */ 225 mb(); 226 227 adreno_gpu_write(adreno_gpu, REG_ADRENO_CP_RB_WPTR, wptr); 228 } 229 230 void adreno_idle(struct msm_gpu *gpu) 231 { 232 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); 233 uint32_t wptr = get_wptr(gpu->rb); 234 int ret; 235 236 /* wait for CP to drain ringbuffer: */ 237 ret = spin_until(get_rptr(adreno_gpu) == wptr); 238 239 if (ret) 240 DRM_ERROR("%s: timeout waiting to drain ringbuffer!\n", gpu->name); 241 242 /* TODO maybe we need to reset GPU here to recover from hang? */ 243 } 244 245 #ifdef CONFIG_DEBUG_FS 246 void adreno_show(struct msm_gpu *gpu, struct seq_file *m) 247 { 248 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); 249 int i; 250 251 seq_printf(m, "revision: %d (%d.%d.%d.%d)\n", 252 adreno_gpu->info->revn, adreno_gpu->rev.core, 253 adreno_gpu->rev.major, adreno_gpu->rev.minor, 254 adreno_gpu->rev.patchid); 255 256 seq_printf(m, "fence: %d/%d\n", adreno_gpu->memptrs->fence, 257 gpu->submitted_fence); 258 seq_printf(m, "rptr: %d\n", get_rptr(adreno_gpu)); 259 seq_printf(m, "wptr: %d\n", adreno_gpu->memptrs->wptr); 260 seq_printf(m, "rb wptr: %d\n", get_wptr(gpu->rb)); 261 262 gpu->funcs->pm_resume(gpu); 263 264 /* dump these out in a form that can be parsed by demsm: */ 265 seq_printf(m, "IO:region %s 00000000 00020000\n", gpu->name); 266 for (i = 0; adreno_gpu->registers[i] != ~0; i += 2) { 267 uint32_t start = adreno_gpu->registers[i]; 268 uint32_t end = adreno_gpu->registers[i+1]; 269 uint32_t addr; 270 271 for (addr = start; addr <= end; addr++) { 272 uint32_t val = gpu_read(gpu, addr); 273 seq_printf(m, "IO:R %08x %08x\n", addr<<2, val); 274 } 275 } 276 277 gpu->funcs->pm_suspend(gpu); 278 } 279 #endif 280 281 /* Dump common gpu status and scratch registers on any hang, to make 282 * the hangcheck logs more useful. The scratch registers seem always 283 * safe to read when GPU has hung (unlike some other regs, depending 284 * on how the GPU hung), and they are useful to match up to cmdstream 285 * dumps when debugging hangs: 286 */ 287 void adreno_dump_info(struct msm_gpu *gpu) 288 { 289 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); 290 int i; 291 292 printk("revision: %d (%d.%d.%d.%d)\n", 293 adreno_gpu->info->revn, adreno_gpu->rev.core, 294 adreno_gpu->rev.major, adreno_gpu->rev.minor, 295 adreno_gpu->rev.patchid); 296 297 printk("fence: %d/%d\n", adreno_gpu->memptrs->fence, 298 gpu->submitted_fence); 299 printk("rptr: %d\n", get_rptr(adreno_gpu)); 300 printk("wptr: %d\n", adreno_gpu->memptrs->wptr); 301 printk("rb wptr: %d\n", get_wptr(gpu->rb)); 302 303 for (i = 0; i < 8; i++) { 304 printk("CP_SCRATCH_REG%d: %u\n", i, 305 gpu_read(gpu, REG_AXXX_CP_SCRATCH_REG0 + i)); 306 } 307 } 308 309 /* would be nice to not have to duplicate the _show() stuff with printk(): */ 310 void adreno_dump(struct msm_gpu *gpu) 311 { 312 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); 313 int i; 314 315 /* dump these out in a form that can be parsed by demsm: */ 316 printk("IO:region %s 00000000 00020000\n", gpu->name); 317 for (i = 0; adreno_gpu->registers[i] != ~0; i += 2) { 318 uint32_t start = adreno_gpu->registers[i]; 319 uint32_t end = adreno_gpu->registers[i+1]; 320 uint32_t addr; 321 322 for (addr = start; addr <= end; addr++) { 323 uint32_t val = gpu_read(gpu, addr); 324 printk("IO:R %08x %08x\n", addr<<2, val); 325 } 326 } 327 } 328 329 static uint32_t ring_freewords(struct msm_gpu *gpu) 330 { 331 struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); 332 uint32_t size = gpu->rb->size / 4; 333 uint32_t wptr = get_wptr(gpu->rb); 334 uint32_t rptr = get_rptr(adreno_gpu); 335 return (rptr + (size - 1) - wptr) % size; 336 } 337 338 void adreno_wait_ring(struct msm_gpu *gpu, uint32_t ndwords) 339 { 340 if (spin_until(ring_freewords(gpu) >= ndwords)) 341 DRM_ERROR("%s: timeout waiting for ringbuffer space\n", gpu->name); 342 } 343 344 static const char *iommu_ports[] = { 345 "gfx3d_user", "gfx3d_priv", 346 "gfx3d1_user", "gfx3d1_priv", 347 }; 348 349 int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev, 350 struct adreno_gpu *adreno_gpu, const struct adreno_gpu_funcs *funcs) 351 { 352 struct adreno_platform_config *config = pdev->dev.platform_data; 353 struct msm_gpu *gpu = &adreno_gpu->base; 354 struct msm_mmu *mmu; 355 int ret; 356 357 adreno_gpu->funcs = funcs; 358 adreno_gpu->info = adreno_info(config->rev); 359 adreno_gpu->gmem = adreno_gpu->info->gmem; 360 adreno_gpu->revn = adreno_gpu->info->revn; 361 adreno_gpu->rev = config->rev; 362 363 gpu->fast_rate = config->fast_rate; 364 gpu->slow_rate = config->slow_rate; 365 gpu->bus_freq = config->bus_freq; 366 #ifdef DOWNSTREAM_CONFIG_MSM_BUS_SCALING 367 gpu->bus_scale_table = config->bus_scale_table; 368 #endif 369 370 DBG("fast_rate=%u, slow_rate=%u, bus_freq=%u", 371 gpu->fast_rate, gpu->slow_rate, gpu->bus_freq); 372 373 ret = msm_gpu_init(drm, pdev, &adreno_gpu->base, &funcs->base, 374 adreno_gpu->info->name, "kgsl_3d0_reg_memory", "kgsl_3d0_irq", 375 RB_SIZE); 376 if (ret) 377 return ret; 378 379 ret = request_firmware(&adreno_gpu->pm4, adreno_gpu->info->pm4fw, drm->dev); 380 if (ret) { 381 dev_err(drm->dev, "failed to load %s PM4 firmware: %d\n", 382 adreno_gpu->info->pm4fw, ret); 383 return ret; 384 } 385 386 ret = request_firmware(&adreno_gpu->pfp, adreno_gpu->info->pfpfw, drm->dev); 387 if (ret) { 388 dev_err(drm->dev, "failed to load %s PFP firmware: %d\n", 389 adreno_gpu->info->pfpfw, ret); 390 return ret; 391 } 392 393 mmu = gpu->mmu; 394 if (mmu) { 395 ret = mmu->funcs->attach(mmu, iommu_ports, 396 ARRAY_SIZE(iommu_ports)); 397 if (ret) 398 return ret; 399 } 400 401 mutex_lock(&drm->struct_mutex); 402 adreno_gpu->memptrs_bo = msm_gem_new(drm, sizeof(*adreno_gpu->memptrs), 403 MSM_BO_UNCACHED); 404 mutex_unlock(&drm->struct_mutex); 405 if (IS_ERR(adreno_gpu->memptrs_bo)) { 406 ret = PTR_ERR(adreno_gpu->memptrs_bo); 407 adreno_gpu->memptrs_bo = NULL; 408 dev_err(drm->dev, "could not allocate memptrs: %d\n", ret); 409 return ret; 410 } 411 412 adreno_gpu->memptrs = msm_gem_vaddr(adreno_gpu->memptrs_bo); 413 if (!adreno_gpu->memptrs) { 414 dev_err(drm->dev, "could not vmap memptrs\n"); 415 return -ENOMEM; 416 } 417 418 ret = msm_gem_get_iova(adreno_gpu->memptrs_bo, gpu->id, 419 &adreno_gpu->memptrs_iova); 420 if (ret) { 421 dev_err(drm->dev, "could not map memptrs: %d\n", ret); 422 return ret; 423 } 424 425 return 0; 426 } 427 428 void adreno_gpu_cleanup(struct adreno_gpu *gpu) 429 { 430 if (gpu->memptrs_bo) { 431 if (gpu->memptrs_iova) 432 msm_gem_put_iova(gpu->memptrs_bo, gpu->base.id); 433 drm_gem_object_unreference_unlocked(gpu->memptrs_bo); 434 } 435 release_firmware(gpu->pm4); 436 release_firmware(gpu->pfp); 437 msm_gpu_cleanup(&gpu->base); 438 } 439