drivers/gpu/drm/msm/adreno/adreno_gpu.c

   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         default:
  45                 DBG("%s: invalid param: %u", gpu->name, param);
  46                 return -EINVAL;
  47         }
  48 }
  49
  50 #define rbmemptr(adreno_gpu, member)  \
  51         ((adreno_gpu)->memptrs_iova + offsetof(struct adreno_rbmemptrs, member))
  52
  53 int adreno_hw_init(struct msm_gpu *gpu)
  54 {
  55         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
  56         int ret;
  57
  58         DBG("%s", gpu->name);
  59
  60         ret = msm_gem_get_iova(gpu->rb->bo, gpu->id, &gpu->rb_iova);
  61         if (ret) {
  62                 gpu->rb_iova = 0;
  63                 dev_err(gpu->dev->dev, "could not map ringbuffer: %d\n", ret);
  64                 return ret;
  65         }
  66
  67         /* Setup REG_CP_RB_CNTL: */
  68         adreno_gpu_write(adreno_gpu, REG_ADRENO_CP_RB_CNTL,
  69                         /* size is log2(quad-words): */
  70                         AXXX_CP_RB_CNTL_BUFSZ(ilog2(gpu->rb->size / 8)) |
  71                         AXXX_CP_RB_CNTL_BLKSZ(ilog2(RB_BLKSIZE / 8)));
  72
  73         /* Setup ringbuffer address: */
  74         adreno_gpu_write(adreno_gpu, REG_ADRENO_CP_RB_BASE, gpu->rb_iova);
  75         adreno_gpu_write(adreno_gpu, REG_ADRENO_CP_RB_RPTR_ADDR,
  76                         rbmemptr(adreno_gpu, rptr));
  77
  78         /* Setup scratch/timestamp: */
  79         adreno_gpu_write(adreno_gpu, REG_ADRENO_SCRATCH_ADDR,
  80                         rbmemptr(adreno_gpu, fence));
  81
  82         adreno_gpu_write(adreno_gpu, REG_ADRENO_SCRATCH_UMSK, 0x1);
  83
  84         return 0;
  85 }
  86
  87 static uint32_t get_wptr(struct msm_ringbuffer *ring)
  88 {
  89         return ring->cur - ring->start;
  90 }
  91
  92 uint32_t adreno_last_fence(struct msm_gpu *gpu)
  93 {
  94         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
  95         return adreno_gpu->memptrs->fence;
  96 }
  97
  98 void adreno_recover(struct msm_gpu *gpu)
  99 {
 100         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 101         struct drm_device *dev = gpu->dev;
 102         int ret;
 103
 104         gpu->funcs->pm_suspend(gpu);
 105
 106         /* reset ringbuffer: */
 107         gpu->rb->cur = gpu->rb->start;
 108
 109         /* reset completed fence seqno, just discard anything pending: */
 110         adreno_gpu->memptrs->fence = gpu->submitted_fence;
 111         adreno_gpu->memptrs->rptr  = 0;
 112         adreno_gpu->memptrs->wptr  = 0;
 113
 114         gpu->funcs->pm_resume(gpu);
 115         ret = gpu->funcs->hw_init(gpu);
 116         if (ret) {
 117                 dev_err(dev->dev, "gpu hw init failed: %d\n", ret);
 118                 /* hmm, oh well? */
 119         }
 120 }
 121
 122 int adreno_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit,
 123                 struct msm_file_private *ctx)
 124 {
 125         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 126         struct msm_drm_private *priv = gpu->dev->dev_private;
 127         struct msm_ringbuffer *ring = gpu->rb;
 128         unsigned i, ibs = 0;
 129
 130         for (i = 0; i < submit->nr_cmds; i++) {
 131                 switch (submit->cmd[i].type) {
 132                 case MSM_SUBMIT_CMD_IB_TARGET_BUF:
 133                         /* ignore IB-targets */
 134                         break;
 135                 case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
 136                         /* ignore if there has not been a ctx switch: */
 137                         if (priv->lastctx == ctx)
 138                                 break;
 139                 case MSM_SUBMIT_CMD_BUF:
 140                         OUT_PKT3(ring, CP_INDIRECT_BUFFER_PFD, 2);
 141                         OUT_RING(ring, submit->cmd[i].iova);
 142                         OUT_RING(ring, submit->cmd[i].size);
 143                         ibs++;
 144                         break;
 145                 }
 146         }
 147
 148         /* on a320, at least, we seem to need to pad things out to an
 149          * even number of qwords to avoid issue w/ CP hanging on wrap-
 150          * around:
 151          */
 152         if (ibs % 2)
 153                 OUT_PKT2(ring);
 154
 155         OUT_PKT0(ring, REG_AXXX_CP_SCRATCH_REG2, 1);
 156         OUT_RING(ring, submit->fence);
 157
 158         if (adreno_is_a3xx(adreno_gpu) || adreno_is_a4xx(adreno_gpu)) {
 159                 /* Flush HLSQ lazy updates to make sure there is nothing
 160                  * pending for indirect loads after the timestamp has
 161                  * passed:
 162                  */
 163                 OUT_PKT3(ring, CP_EVENT_WRITE, 1);
 164                 OUT_RING(ring, HLSQ_FLUSH);
 165
 166                 OUT_PKT3(ring, CP_WAIT_FOR_IDLE, 1);
 167                 OUT_RING(ring, 0x00000000);
 168         }
 169
 170         OUT_PKT3(ring, CP_EVENT_WRITE, 3);
 171         OUT_RING(ring, CACHE_FLUSH_TS);
 172         OUT_RING(ring, rbmemptr(adreno_gpu, fence));
 173         OUT_RING(ring, submit->fence);
 174
 175         /* we could maybe be clever and only CP_COND_EXEC the interrupt: */
 176         OUT_PKT3(ring, CP_INTERRUPT, 1);
 177         OUT_RING(ring, 0x80000000);
 178
 179 #if 0
 180         if (adreno_is_a3xx(adreno_gpu)) {
 181                 /* Dummy set-constant to trigger context rollover */
 182                 OUT_PKT3(ring, CP_SET_CONSTANT, 2);
 183                 OUT_RING(ring, CP_REG(REG_A3XX_HLSQ_CL_KERNEL_GROUP_X_REG));
 184                 OUT_RING(ring, 0x00000000);
 185         }
 186 #endif
 187
 188         gpu->funcs->flush(gpu);
 189
 190         return 0;
 191 }
 192
 193 void adreno_flush(struct msm_gpu *gpu)
 194 {
 195         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 196         uint32_t wptr = get_wptr(gpu->rb);
 197
 198         /* ensure writes to ringbuffer have hit system memory: */
 199         mb();
 200
 201         adreno_gpu_write(adreno_gpu, REG_ADRENO_CP_RB_WPTR, wptr);
 202 }
 203
 204 void adreno_idle(struct msm_gpu *gpu)
 205 {
 206         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 207         uint32_t wptr = get_wptr(gpu->rb);
 208
 209         /* wait for CP to drain ringbuffer: */
 210         if (spin_until(adreno_gpu->memptrs->rptr == wptr))
 211                 DRM_ERROR("%s: timeout waiting to drain ringbuffer!\n", gpu->name);
 212
 213         /* TODO maybe we need to reset GPU here to recover from hang? */
 214 }
 215
 216 #ifdef CONFIG_DEBUG_FS
 217 void adreno_show(struct msm_gpu *gpu, struct seq_file *m)
 218 {
 219         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 220         int i;
 221
 222         seq_printf(m, "revision: %d (%d.%d.%d.%d)\n",
 223                         adreno_gpu->info->revn, adreno_gpu->rev.core,
 224                         adreno_gpu->rev.major, adreno_gpu->rev.minor,
 225                         adreno_gpu->rev.patchid);
 226
 227         seq_printf(m, "fence:    %d/%d\n", adreno_gpu->memptrs->fence,
 228                         gpu->submitted_fence);
 229         seq_printf(m, "rptr:     %d\n", adreno_gpu->memptrs->rptr);
 230         seq_printf(m, "wptr:     %d\n", adreno_gpu->memptrs->wptr);
 231         seq_printf(m, "rb wptr:  %d\n", get_wptr(gpu->rb));
 232
 233         gpu->funcs->pm_resume(gpu);
 234
 235         /* dump these out in a form that can be parsed by demsm: */
 236         seq_printf(m, "IO:region %s 00000000 00020000\n", gpu->name);
 237         for (i = 0; adreno_gpu->registers[i] != ~0; i += 2) {
 238                 uint32_t start = adreno_gpu->registers[i];
 239                 uint32_t end   = adreno_gpu->registers[i+1];
 240                 uint32_t addr;
 241
 242                 for (addr = start; addr <= end; addr++) {
 243                         uint32_t val = gpu_read(gpu, addr);
 244                         seq_printf(m, "IO:R %08x %08x\n", addr<<2, val);
 245                 }
 246         }
 247
 248         gpu->funcs->pm_suspend(gpu);
 249 }
 250 #endif
 251
 252 /* would be nice to not have to duplicate the _show() stuff with printk(): */
 253 void adreno_dump(struct msm_gpu *gpu)
 254 {
 255         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 256         int i;
 257
 258         printk("revision: %d (%d.%d.%d.%d)\n",
 259                         adreno_gpu->info->revn, adreno_gpu->rev.core,
 260                         adreno_gpu->rev.major, adreno_gpu->rev.minor,
 261                         adreno_gpu->rev.patchid);
 262
 263         printk("fence:    %d/%d\n", adreno_gpu->memptrs->fence,
 264                         gpu->submitted_fence);
 265         printk("rptr:     %d\n", adreno_gpu->memptrs->rptr);
 266         printk("wptr:     %d\n", adreno_gpu->memptrs->wptr);
 267         printk("rb wptr:  %d\n", get_wptr(gpu->rb));
 268
 269         /* dump these out in a form that can be parsed by demsm: */
 270         printk("IO:region %s 00000000 00020000\n", gpu->name);
 271         for (i = 0; adreno_gpu->registers[i] != ~0; i += 2) {
 272                 uint32_t start = adreno_gpu->registers[i];
 273                 uint32_t end   = adreno_gpu->registers[i+1];
 274                 uint32_t addr;
 275
 276                 for (addr = start; addr <= end; addr++) {
 277                         uint32_t val = gpu_read(gpu, addr);
 278                         printk("IO:R %08x %08x\n", addr<<2, val);
 279                 }
 280         }
 281 }
 282
 283 static uint32_t ring_freewords(struct msm_gpu *gpu)
 284 {
 285         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 286         uint32_t size = gpu->rb->size / 4;
 287         uint32_t wptr = get_wptr(gpu->rb);
 288         uint32_t rptr = adreno_gpu->memptrs->rptr;
 289         return (rptr + (size - 1) - wptr) % size;
 290 }
 291
 292 void adreno_wait_ring(struct msm_gpu *gpu, uint32_t ndwords)
 293 {
 294         if (spin_until(ring_freewords(gpu) >= ndwords))
 295                 DRM_ERROR("%s: timeout waiting for ringbuffer space\n", gpu->name);
 296 }
 297
 298 static const char *iommu_ports[] = {
 299                 "gfx3d_user", "gfx3d_priv",
 300                 "gfx3d1_user", "gfx3d1_priv",
 301 };
 302
 303 int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 304                 struct adreno_gpu *adreno_gpu, const struct adreno_gpu_funcs *funcs)
 305 {
 306         struct adreno_platform_config *config = pdev->dev.platform_data;
 307         struct msm_gpu *gpu = &adreno_gpu->base;
 308         struct msm_mmu *mmu;
 309         int ret;
 310
 311         adreno_gpu->funcs = funcs;
 312         adreno_gpu->info = adreno_info(config->rev);
 313         adreno_gpu->gmem = adreno_gpu->info->gmem;
 314         adreno_gpu->revn = adreno_gpu->info->revn;
 315         adreno_gpu->rev = config->rev;
 316
 317         gpu->fast_rate = config->fast_rate;
 318         gpu->slow_rate = config->slow_rate;
 319         gpu->bus_freq  = config->bus_freq;
 320 #ifdef CONFIG_MSM_BUS_SCALING
 321         gpu->bus_scale_table = config->bus_scale_table;
 322 #endif
 323
 324         DBG("fast_rate=%u, slow_rate=%u, bus_freq=%u",
 325                         gpu->fast_rate, gpu->slow_rate, gpu->bus_freq);
 326
 327         ret = msm_gpu_init(drm, pdev, &adreno_gpu->base, &funcs->base,
 328                         adreno_gpu->info->name, "kgsl_3d0_reg_memory", "kgsl_3d0_irq",
 329                         RB_SIZE);
 330         if (ret)
 331                 return ret;
 332
 333         ret = request_firmware(&adreno_gpu->pm4, adreno_gpu->info->pm4fw, drm->dev);
 334         if (ret) {
 335                 dev_err(drm->dev, "failed to load %s PM4 firmware: %d\n",
 336                                 adreno_gpu->info->pm4fw, ret);
 337                 return ret;
 338         }
 339
 340         ret = request_firmware(&adreno_gpu->pfp, adreno_gpu->info->pfpfw, drm->dev);
 341         if (ret) {
 342                 dev_err(drm->dev, "failed to load %s PFP firmware: %d\n",
 343                                 adreno_gpu->info->pfpfw, ret);
 344                 return ret;
 345         }
 346
 347         mmu = gpu->mmu;
 348         if (mmu) {
 349                 ret = mmu->funcs->attach(mmu, iommu_ports,
 350                                 ARRAY_SIZE(iommu_ports));
 351                 if (ret)
 352                         return ret;
 353         }
 354
 355         mutex_lock(&drm->struct_mutex);
 356         adreno_gpu->memptrs_bo = msm_gem_new(drm, sizeof(*adreno_gpu->memptrs),
 357                         MSM_BO_UNCACHED);
 358         mutex_unlock(&drm->struct_mutex);
 359         if (IS_ERR(adreno_gpu->memptrs_bo)) {
 360                 ret = PTR_ERR(adreno_gpu->memptrs_bo);
 361                 adreno_gpu->memptrs_bo = NULL;
 362                 dev_err(drm->dev, "could not allocate memptrs: %d\n", ret);
 363                 return ret;
 364         }
 365
 366         adreno_gpu->memptrs = msm_gem_vaddr(adreno_gpu->memptrs_bo);
 367         if (!adreno_gpu->memptrs) {
 368                 dev_err(drm->dev, "could not vmap memptrs\n");
 369                 return -ENOMEM;
 370         }
 371
 372         ret = msm_gem_get_iova(adreno_gpu->memptrs_bo, gpu->id,
 373                         &adreno_gpu->memptrs_iova);
 374         if (ret) {
 375                 dev_err(drm->dev, "could not map memptrs: %d\n", ret);
 376                 return ret;
 377         }
 378
 379         return 0;
 380 }
 381
 382 void adreno_gpu_cleanup(struct adreno_gpu *gpu)
 383 {
 384         if (gpu->memptrs_bo) {
 385                 if (gpu->memptrs_iova)
 386                         msm_gem_put_iova(gpu->memptrs_bo, gpu->base.id);
 387                 drm_gem_object_unreference_unlocked(gpu->memptrs_bo);
 388         }
 389         release_firmware(gpu->pm4);
 390         release_firmware(gpu->pfp);
 391         msm_gpu_cleanup(&gpu->base);
 392 }