1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright 2019 Collabora Ltd */ 3 4 #include <linux/completion.h> 5 #include <linux/iopoll.h> 6 #include <linux/iosys-map.h> 7 #include <linux/pm_runtime.h> 8 #include <linux/slab.h> 9 #include <linux/uaccess.h> 10 11 #include <drm/drm_file.h> 12 #include <drm/drm_gem_shmem_helper.h> 13 #include <drm/panfrost_drm.h> 14 15 #include "panfrost_device.h" 16 #include "panfrost_features.h" 17 #include "panfrost_gem.h" 18 #include "panfrost_issues.h" 19 #include "panfrost_job.h" 20 #include "panfrost_mmu.h" 21 #include "panfrost_perfcnt.h" 22 #include "panfrost_regs.h" 23 24 #define COUNTERS_PER_BLOCK 64 25 #define BYTES_PER_COUNTER 4 26 #define BLOCKS_PER_COREGROUP 8 27 #define V4_SHADERS_PER_COREGROUP 4 28 29 struct panfrost_perfcnt { 30 struct panfrost_gem_mapping *mapping; 31 size_t bosize; 32 void *buf; 33 struct panfrost_file_priv *user; 34 struct mutex lock; 35 struct completion dump_comp; 36 }; 37 38 void panfrost_perfcnt_clean_cache_done(struct panfrost_device *pfdev) 39 { 40 complete(&pfdev->perfcnt->dump_comp); 41 } 42 43 void panfrost_perfcnt_sample_done(struct panfrost_device *pfdev) 44 { 45 gpu_write(pfdev, GPU_CMD, GPU_CMD_CLEAN_CACHES); 46 } 47 48 static int panfrost_perfcnt_dump_locked(struct panfrost_device *pfdev) 49 { 50 u64 gpuva; 51 int ret; 52 53 reinit_completion(&pfdev->perfcnt->dump_comp); 54 gpuva = pfdev->perfcnt->mapping->mmnode.start << PAGE_SHIFT; 55 gpu_write(pfdev, GPU_PERFCNT_BASE_LO, lower_32_bits(gpuva)); 56 gpu_write(pfdev, GPU_PERFCNT_BASE_HI, upper_32_bits(gpuva)); 57 gpu_write(pfdev, GPU_INT_CLEAR, 58 GPU_IRQ_CLEAN_CACHES_COMPLETED | 59 GPU_IRQ_PERFCNT_SAMPLE_COMPLETED); 60 gpu_write(pfdev, GPU_CMD, GPU_CMD_PERFCNT_SAMPLE); 61 ret = wait_for_completion_interruptible_timeout(&pfdev->perfcnt->dump_comp, 62 msecs_to_jiffies(1000)); 63 if (!ret) 64 ret = -ETIMEDOUT; 65 else if (ret > 0) 66 ret = 0; 67 68 return ret; 69 } 70 71 static int panfrost_perfcnt_enable_locked(struct panfrost_device *pfdev, 72 struct drm_file *file_priv, 73 unsigned int counterset) 74 { 75 struct panfrost_file_priv *user = file_priv->driver_priv; 76 struct panfrost_perfcnt *perfcnt = pfdev->perfcnt; 77 struct iosys_map map; 78 struct drm_gem_shmem_object *bo; 79 u32 cfg, as; 80 int ret; 81 82 if (user == perfcnt->user) 83 return 0; 84 else if (perfcnt->user) 85 return -EBUSY; 86 87 ret = pm_runtime_get_sync(pfdev->dev); 88 if (ret < 0) 89 goto err_put_pm; 90 91 bo = drm_gem_shmem_create(pfdev->ddev, perfcnt->bosize); 92 if (IS_ERR(bo)) { 93 ret = PTR_ERR(bo); 94 goto err_put_pm; 95 } 96 97 /* Map the perfcnt buf in the address space attached to file_priv. */ 98 ret = panfrost_gem_open(&bo->base, file_priv); 99 if (ret) 100 goto err_put_bo; 101 102 perfcnt->mapping = panfrost_gem_mapping_get(to_panfrost_bo(&bo->base), 103 user); 104 if (!perfcnt->mapping) { 105 ret = -EINVAL; 106 goto err_close_bo; 107 } 108 109 ret = drm_gem_vmap(&bo->base, &map); 110 if (ret) 111 goto err_put_mapping; 112 perfcnt->buf = map.vaddr; 113 114 panfrost_gem_internal_set_label(&bo->base, "Perfcnt sample buffer"); 115 116 /* 117 * Invalidate the cache and clear the counters to start from a fresh 118 * state. 119 */ 120 reinit_completion(&pfdev->perfcnt->dump_comp); 121 gpu_write(pfdev, GPU_INT_CLEAR, 122 GPU_IRQ_CLEAN_CACHES_COMPLETED | 123 GPU_IRQ_PERFCNT_SAMPLE_COMPLETED); 124 gpu_write(pfdev, GPU_CMD, GPU_CMD_PERFCNT_CLEAR); 125 gpu_write(pfdev, GPU_CMD, GPU_CMD_CLEAN_INV_CACHES); 126 ret = wait_for_completion_timeout(&pfdev->perfcnt->dump_comp, 127 msecs_to_jiffies(1000)); 128 if (!ret) { 129 ret = -ETIMEDOUT; 130 goto err_vunmap; 131 } 132 133 perfcnt->user = user; 134 135 as = panfrost_mmu_as_get(pfdev, perfcnt->mapping->mmu); 136 cfg = GPU_PERFCNT_CFG_AS(as) | 137 GPU_PERFCNT_CFG_MODE(GPU_PERFCNT_CFG_MODE_MANUAL); 138 139 /* 140 * Bifrost GPUs have 2 set of counters, but we're only interested by 141 * the first one for now. 142 */ 143 if (panfrost_model_is_bifrost(pfdev)) 144 cfg |= GPU_PERFCNT_CFG_SETSEL(counterset); 145 146 gpu_write(pfdev, GPU_PRFCNT_JM_EN, 0xffffffff); 147 gpu_write(pfdev, GPU_PRFCNT_SHADER_EN, 0xffffffff); 148 gpu_write(pfdev, GPU_PRFCNT_MMU_L2_EN, 0xffffffff); 149 150 /* 151 * Due to PRLAM-8186 we need to disable the Tiler before we enable HW 152 * counters. 153 */ 154 if (panfrost_has_hw_issue(pfdev, HW_ISSUE_8186)) 155 gpu_write(pfdev, GPU_PRFCNT_TILER_EN, 0); 156 else 157 gpu_write(pfdev, GPU_PRFCNT_TILER_EN, 0xffffffff); 158 159 gpu_write(pfdev, GPU_PERFCNT_CFG, cfg); 160 161 if (panfrost_has_hw_issue(pfdev, HW_ISSUE_8186)) 162 gpu_write(pfdev, GPU_PRFCNT_TILER_EN, 0xffffffff); 163 164 /* The BO ref is retained by the mapping. */ 165 drm_gem_object_put(&bo->base); 166 167 return 0; 168 169 err_vunmap: 170 drm_gem_vunmap(&bo->base, &map); 171 err_put_mapping: 172 panfrost_gem_mapping_put(perfcnt->mapping); 173 err_close_bo: 174 panfrost_gem_close(&bo->base, file_priv); 175 err_put_bo: 176 drm_gem_object_put(&bo->base); 177 err_put_pm: 178 pm_runtime_put(pfdev->dev); 179 return ret; 180 } 181 182 static int panfrost_perfcnt_disable_locked(struct panfrost_device *pfdev, 183 struct drm_file *file_priv) 184 { 185 struct panfrost_file_priv *user = file_priv->driver_priv; 186 struct panfrost_perfcnt *perfcnt = pfdev->perfcnt; 187 struct iosys_map map = IOSYS_MAP_INIT_VADDR(perfcnt->buf); 188 189 if (user != perfcnt->user) 190 return -EINVAL; 191 192 gpu_write(pfdev, GPU_PRFCNT_JM_EN, 0x0); 193 gpu_write(pfdev, GPU_PRFCNT_SHADER_EN, 0x0); 194 gpu_write(pfdev, GPU_PRFCNT_MMU_L2_EN, 0x0); 195 gpu_write(pfdev, GPU_PRFCNT_TILER_EN, 0); 196 gpu_write(pfdev, GPU_PERFCNT_CFG, 197 GPU_PERFCNT_CFG_MODE(GPU_PERFCNT_CFG_MODE_OFF)); 198 199 perfcnt->user = NULL; 200 drm_gem_vunmap(&perfcnt->mapping->obj->base.base, &map); 201 perfcnt->buf = NULL; 202 panfrost_gem_close(&perfcnt->mapping->obj->base.base, file_priv); 203 panfrost_mmu_as_put(pfdev, perfcnt->mapping->mmu); 204 panfrost_gem_mapping_put(perfcnt->mapping); 205 perfcnt->mapping = NULL; 206 pm_runtime_put_autosuspend(pfdev->dev); 207 208 return 0; 209 } 210 211 int panfrost_ioctl_perfcnt_enable(struct drm_device *dev, void *data, 212 struct drm_file *file_priv) 213 { 214 struct panfrost_device *pfdev = dev->dev_private; 215 struct panfrost_perfcnt *perfcnt = pfdev->perfcnt; 216 struct drm_panfrost_perfcnt_enable *req = data; 217 int ret; 218 219 ret = panfrost_unstable_ioctl_check(); 220 if (ret) 221 return ret; 222 223 /* Only Bifrost GPUs have 2 set of counters. */ 224 if (req->counterset > (panfrost_model_is_bifrost(pfdev) ? 1 : 0)) 225 return -EINVAL; 226 227 mutex_lock(&perfcnt->lock); 228 if (req->enable) 229 ret = panfrost_perfcnt_enable_locked(pfdev, file_priv, 230 req->counterset); 231 else 232 ret = panfrost_perfcnt_disable_locked(pfdev, file_priv); 233 mutex_unlock(&perfcnt->lock); 234 235 return ret; 236 } 237 238 int panfrost_ioctl_perfcnt_dump(struct drm_device *dev, void *data, 239 struct drm_file *file_priv) 240 { 241 struct panfrost_device *pfdev = dev->dev_private; 242 struct panfrost_perfcnt *perfcnt = pfdev->perfcnt; 243 struct drm_panfrost_perfcnt_dump *req = data; 244 void __user *user_ptr = (void __user *)(uintptr_t)req->buf_ptr; 245 int ret; 246 247 ret = panfrost_unstable_ioctl_check(); 248 if (ret) 249 return ret; 250 251 mutex_lock(&perfcnt->lock); 252 if (perfcnt->user != file_priv->driver_priv) { 253 ret = -EINVAL; 254 goto out; 255 } 256 257 ret = panfrost_perfcnt_dump_locked(pfdev); 258 if (ret) 259 goto out; 260 261 if (copy_to_user(user_ptr, perfcnt->buf, perfcnt->bosize)) 262 ret = -EFAULT; 263 264 out: 265 mutex_unlock(&perfcnt->lock); 266 267 return ret; 268 } 269 270 void panfrost_perfcnt_close(struct drm_file *file_priv) 271 { 272 struct panfrost_file_priv *pfile = file_priv->driver_priv; 273 struct panfrost_device *pfdev = pfile->pfdev; 274 struct panfrost_perfcnt *perfcnt = pfdev->perfcnt; 275 276 pm_runtime_get_sync(pfdev->dev); 277 mutex_lock(&perfcnt->lock); 278 if (perfcnt->user == pfile) 279 panfrost_perfcnt_disable_locked(pfdev, file_priv); 280 mutex_unlock(&perfcnt->lock); 281 pm_runtime_put_autosuspend(pfdev->dev); 282 } 283 284 int panfrost_perfcnt_init(struct panfrost_device *pfdev) 285 { 286 struct panfrost_perfcnt *perfcnt; 287 size_t size; 288 289 if (panfrost_has_hw_feature(pfdev, HW_FEATURE_V4)) { 290 unsigned int ncoregroups; 291 292 ncoregroups = hweight64(pfdev->features.l2_present); 293 size = ncoregroups * BLOCKS_PER_COREGROUP * 294 COUNTERS_PER_BLOCK * BYTES_PER_COUNTER; 295 } else { 296 unsigned int nl2c, ncores; 297 298 /* 299 * TODO: define a macro to extract the number of l2 caches from 300 * mem_features. 301 */ 302 nl2c = ((pfdev->features.mem_features >> 8) & GENMASK(3, 0)) + 1; 303 304 /* 305 * shader_present might be sparse, but the counters layout 306 * forces to dump unused regions too, hence the fls64() call 307 * instead of hweight64(). 308 */ 309 ncores = fls64(pfdev->features.shader_present); 310 311 /* 312 * There's always one JM and one Tiler block, hence the '+ 2' 313 * here. 314 */ 315 size = (nl2c + ncores + 2) * 316 COUNTERS_PER_BLOCK * BYTES_PER_COUNTER; 317 } 318 319 perfcnt = devm_kzalloc(pfdev->dev, sizeof(*perfcnt), GFP_KERNEL); 320 if (!perfcnt) 321 return -ENOMEM; 322 323 perfcnt->bosize = size; 324 325 /* Start with everything disabled. */ 326 gpu_write(pfdev, GPU_PERFCNT_CFG, 327 GPU_PERFCNT_CFG_MODE(GPU_PERFCNT_CFG_MODE_OFF)); 328 gpu_write(pfdev, GPU_PRFCNT_JM_EN, 0); 329 gpu_write(pfdev, GPU_PRFCNT_SHADER_EN, 0); 330 gpu_write(pfdev, GPU_PRFCNT_MMU_L2_EN, 0); 331 gpu_write(pfdev, GPU_PRFCNT_TILER_EN, 0); 332 333 init_completion(&perfcnt->dump_comp); 334 mutex_init(&perfcnt->lock); 335 pfdev->perfcnt = perfcnt; 336 337 return 0; 338 } 339 340 void panfrost_perfcnt_fini(struct panfrost_device *pfdev) 341 { 342 /* Disable everything before leaving. */ 343 gpu_write(pfdev, GPU_PERFCNT_CFG, 344 GPU_PERFCNT_CFG_MODE(GPU_PERFCNT_CFG_MODE_OFF)); 345 gpu_write(pfdev, GPU_PRFCNT_JM_EN, 0); 346 gpu_write(pfdev, GPU_PRFCNT_SHADER_EN, 0); 347 gpu_write(pfdev, GPU_PRFCNT_MMU_L2_EN, 0); 348 gpu_write(pfdev, GPU_PRFCNT_TILER_EN, 0); 349 } 350