1 // SPDX-License-Identifier: GPL-2.0+ 2 /* Copyright (C) 2015-2018 Broadcom */ 3 4 #include <linux/delay.h> 5 #include <linux/mutex.h> 6 #include <linux/spinlock_types.h> 7 #include <linux/workqueue.h> 8 9 #include <drm/drm_encoder.h> 10 #include <drm/drm_gem.h> 11 #include <drm/drm_gem_shmem_helper.h> 12 #include <drm/gpu_scheduler.h> 13 14 #include "uapi/drm/v3d_drm.h" 15 16 struct clk; 17 struct platform_device; 18 struct reset_control; 19 20 #define GMP_GRANULARITY (128 * 1024) 21 22 #define V3D_MAX_QUEUES (V3D_CACHE_CLEAN + 1) 23 24 struct v3d_queue_state { 25 struct drm_gpu_scheduler sched; 26 27 u64 fence_context; 28 u64 emit_seqno; 29 }; 30 31 /* Performance monitor object. The perform lifetime is controlled by userspace 32 * using perfmon related ioctls. A perfmon can be attached to a submit_cl 33 * request, and when this is the case, HW perf counters will be activated just 34 * before the submit_cl is submitted to the GPU and disabled when the job is 35 * done. This way, only events related to a specific job will be counted. 36 */ 37 struct v3d_perfmon { 38 /* Tracks the number of users of the perfmon, when this counter reaches 39 * zero the perfmon is destroyed. 40 */ 41 refcount_t refcnt; 42 43 /* Protects perfmon stop, as it can be invoked from multiple places. */ 44 struct mutex lock; 45 46 /* Number of counters activated in this perfmon instance 47 * (should be less than DRM_V3D_MAX_PERF_COUNTERS). 48 */ 49 u8 ncounters; 50 51 /* Events counted by the HW perf counters. */ 52 u8 counters[DRM_V3D_MAX_PERF_COUNTERS]; 53 54 /* Storage for counter values. Counters are incremented by the 55 * HW perf counter values every time the perfmon is attached 56 * to a GPU job. This way, perfmon users don't have to 57 * retrieve the results after each job if they want to track 58 * events covering several submissions. Note that counter 59 * values can't be reset, but you can fake a reset by 60 * destroying the perfmon and creating a new one. 61 */ 62 u64 values[]; 63 }; 64 65 struct v3d_dev { 66 struct drm_device drm; 67 68 /* Short representation (e.g. 33, 41) of the V3D tech version 69 * and revision. 70 */ 71 int ver; 72 bool single_irq_line; 73 74 void __iomem *hub_regs; 75 void __iomem *core_regs[3]; 76 void __iomem *bridge_regs; 77 void __iomem *gca_regs; 78 struct clk *clk; 79 struct reset_control *reset; 80 81 /* Virtual and DMA addresses of the single shared page table. */ 82 volatile u32 *pt; 83 dma_addr_t pt_paddr; 84 85 /* Virtual and DMA addresses of the MMU's scratch page. When 86 * a read or write is invalid in the MMU, it will be 87 * redirected here. 88 */ 89 void *mmu_scratch; 90 dma_addr_t mmu_scratch_paddr; 91 /* virtual address bits from V3D to the MMU. */ 92 int va_width; 93 94 /* Number of V3D cores. */ 95 u32 cores; 96 97 /* Allocator managing the address space. All units are in 98 * number of pages. 99 */ 100 struct drm_mm mm; 101 spinlock_t mm_lock; 102 103 struct work_struct overflow_mem_work; 104 105 struct v3d_bin_job *bin_job; 106 struct v3d_render_job *render_job; 107 struct v3d_tfu_job *tfu_job; 108 struct v3d_csd_job *csd_job; 109 110 struct v3d_queue_state queue[V3D_MAX_QUEUES]; 111 112 /* Spinlock used to synchronize the overflow memory 113 * management against bin job submission. 114 */ 115 spinlock_t job_lock; 116 117 /* Used to track the active perfmon if any. */ 118 struct v3d_perfmon *active_perfmon; 119 120 /* Protects bo_stats */ 121 struct mutex bo_lock; 122 123 /* Lock taken when resetting the GPU, to keep multiple 124 * processes from trying to park the scheduler threads and 125 * reset at once. 126 */ 127 struct mutex reset_lock; 128 129 /* Lock taken when creating and pushing the GPU scheduler 130 * jobs, to keep the sched-fence seqnos in order. 131 */ 132 struct mutex sched_lock; 133 134 /* Lock taken during a cache clean and when initiating an L2 135 * flush, to keep L2 flushes from interfering with the 136 * synchronous L2 cleans. 137 */ 138 struct mutex cache_clean_lock; 139 140 struct { 141 u32 num_allocated; 142 u32 pages_allocated; 143 } bo_stats; 144 }; 145 146 static inline struct v3d_dev * 147 to_v3d_dev(struct drm_device *dev) 148 { 149 return container_of(dev, struct v3d_dev, drm); 150 } 151 152 static inline bool 153 v3d_has_csd(struct v3d_dev *v3d) 154 { 155 return v3d->ver >= 41; 156 } 157 158 #define v3d_to_pdev(v3d) to_platform_device((v3d)->drm.dev) 159 160 /* The per-fd struct, which tracks the MMU mappings. */ 161 struct v3d_file_priv { 162 struct v3d_dev *v3d; 163 164 struct { 165 struct idr idr; 166 struct mutex lock; 167 } perfmon; 168 169 struct drm_sched_entity sched_entity[V3D_MAX_QUEUES]; 170 }; 171 172 struct v3d_bo { 173 struct drm_gem_shmem_object base; 174 175 struct drm_mm_node node; 176 177 /* List entry for the BO's position in 178 * v3d_render_job->unref_list 179 */ 180 struct list_head unref_head; 181 }; 182 183 static inline struct v3d_bo * 184 to_v3d_bo(struct drm_gem_object *bo) 185 { 186 return (struct v3d_bo *)bo; 187 } 188 189 struct v3d_fence { 190 struct dma_fence base; 191 struct drm_device *dev; 192 /* v3d seqno for signaled() test */ 193 u64 seqno; 194 enum v3d_queue queue; 195 }; 196 197 static inline struct v3d_fence * 198 to_v3d_fence(struct dma_fence *fence) 199 { 200 return (struct v3d_fence *)fence; 201 } 202 203 #define V3D_READ(offset) readl(v3d->hub_regs + offset) 204 #define V3D_WRITE(offset, val) writel(val, v3d->hub_regs + offset) 205 206 #define V3D_BRIDGE_READ(offset) readl(v3d->bridge_regs + offset) 207 #define V3D_BRIDGE_WRITE(offset, val) writel(val, v3d->bridge_regs + offset) 208 209 #define V3D_GCA_READ(offset) readl(v3d->gca_regs + offset) 210 #define V3D_GCA_WRITE(offset, val) writel(val, v3d->gca_regs + offset) 211 212 #define V3D_CORE_READ(core, offset) readl(v3d->core_regs[core] + offset) 213 #define V3D_CORE_WRITE(core, offset, val) writel(val, v3d->core_regs[core] + offset) 214 215 struct v3d_job { 216 struct drm_sched_job base; 217 218 struct kref refcount; 219 220 struct v3d_dev *v3d; 221 222 /* This is the array of BOs that were looked up at the start 223 * of submission. 224 */ 225 struct drm_gem_object **bo; 226 u32 bo_count; 227 228 /* v3d fence to be signaled by IRQ handler when the job is complete. */ 229 struct dma_fence *irq_fence; 230 231 /* scheduler fence for when the job is considered complete and 232 * the BO reservations can be released. 233 */ 234 struct dma_fence *done_fence; 235 236 /* Pointer to a performance monitor object if the user requested it, 237 * NULL otherwise. 238 */ 239 struct v3d_perfmon *perfmon; 240 241 /* Callback for the freeing of the job on refcount going to 0. */ 242 void (*free)(struct kref *ref); 243 }; 244 245 struct v3d_bin_job { 246 struct v3d_job base; 247 248 /* GPU virtual addresses of the start/end of the CL job. */ 249 u32 start, end; 250 251 u32 timedout_ctca, timedout_ctra; 252 253 /* Corresponding render job, for attaching our overflow memory. */ 254 struct v3d_render_job *render; 255 256 /* Submitted tile memory allocation start/size, tile state. */ 257 u32 qma, qms, qts; 258 }; 259 260 struct v3d_render_job { 261 struct v3d_job base; 262 263 /* GPU virtual addresses of the start/end of the CL job. */ 264 u32 start, end; 265 266 u32 timedout_ctca, timedout_ctra; 267 268 /* List of overflow BOs used in the job that need to be 269 * released once the job is complete. 270 */ 271 struct list_head unref_list; 272 }; 273 274 struct v3d_tfu_job { 275 struct v3d_job base; 276 277 struct drm_v3d_submit_tfu args; 278 }; 279 280 struct v3d_csd_job { 281 struct v3d_job base; 282 283 u32 timedout_batches; 284 285 struct drm_v3d_submit_csd args; 286 }; 287 288 struct v3d_submit_outsync { 289 struct drm_syncobj *syncobj; 290 }; 291 292 struct v3d_submit_ext { 293 u32 flags; 294 u32 wait_stage; 295 296 u32 in_sync_count; 297 u64 in_syncs; 298 299 u32 out_sync_count; 300 struct v3d_submit_outsync *out_syncs; 301 }; 302 303 /** 304 * __wait_for - magic wait macro 305 * 306 * Macro to help avoid open coding check/wait/timeout patterns. Note that it's 307 * important that we check the condition again after having timed out, since the 308 * timeout could be due to preemption or similar and we've never had a chance to 309 * check the condition before the timeout. 310 */ 311 #define __wait_for(OP, COND, US, Wmin, Wmax) ({ \ 312 const ktime_t end__ = ktime_add_ns(ktime_get_raw(), 1000ll * (US)); \ 313 long wait__ = (Wmin); /* recommended min for usleep is 10 us */ \ 314 int ret__; \ 315 might_sleep(); \ 316 for (;;) { \ 317 const bool expired__ = ktime_after(ktime_get_raw(), end__); \ 318 OP; \ 319 /* Guarantee COND check prior to timeout */ \ 320 barrier(); \ 321 if (COND) { \ 322 ret__ = 0; \ 323 break; \ 324 } \ 325 if (expired__) { \ 326 ret__ = -ETIMEDOUT; \ 327 break; \ 328 } \ 329 usleep_range(wait__, wait__ * 2); \ 330 if (wait__ < (Wmax)) \ 331 wait__ <<= 1; \ 332 } \ 333 ret__; \ 334 }) 335 336 #define _wait_for(COND, US, Wmin, Wmax) __wait_for(, (COND), (US), (Wmin), \ 337 (Wmax)) 338 #define wait_for(COND, MS) _wait_for((COND), (MS) * 1000, 10, 1000) 339 340 static inline unsigned long nsecs_to_jiffies_timeout(const u64 n) 341 { 342 /* nsecs_to_jiffies64() does not guard against overflow */ 343 if (NSEC_PER_SEC % HZ && 344 div_u64(n, NSEC_PER_SEC) >= MAX_JIFFY_OFFSET / HZ) 345 return MAX_JIFFY_OFFSET; 346 347 return min_t(u64, MAX_JIFFY_OFFSET, nsecs_to_jiffies64(n) + 1); 348 } 349 350 /* v3d_bo.c */ 351 struct drm_gem_object *v3d_create_object(struct drm_device *dev, size_t size); 352 void v3d_free_object(struct drm_gem_object *gem_obj); 353 struct v3d_bo *v3d_bo_create(struct drm_device *dev, struct drm_file *file_priv, 354 size_t size); 355 int v3d_create_bo_ioctl(struct drm_device *dev, void *data, 356 struct drm_file *file_priv); 357 int v3d_mmap_bo_ioctl(struct drm_device *dev, void *data, 358 struct drm_file *file_priv); 359 int v3d_get_bo_offset_ioctl(struct drm_device *dev, void *data, 360 struct drm_file *file_priv); 361 struct drm_gem_object *v3d_prime_import_sg_table(struct drm_device *dev, 362 struct dma_buf_attachment *attach, 363 struct sg_table *sgt); 364 365 /* v3d_debugfs.c */ 366 void v3d_debugfs_init(struct drm_minor *minor); 367 368 /* v3d_fence.c */ 369 extern const struct dma_fence_ops v3d_fence_ops; 370 struct dma_fence *v3d_fence_create(struct v3d_dev *v3d, enum v3d_queue queue); 371 372 /* v3d_gem.c */ 373 int v3d_gem_init(struct drm_device *dev); 374 void v3d_gem_destroy(struct drm_device *dev); 375 int v3d_submit_cl_ioctl(struct drm_device *dev, void *data, 376 struct drm_file *file_priv); 377 int v3d_submit_tfu_ioctl(struct drm_device *dev, void *data, 378 struct drm_file *file_priv); 379 int v3d_submit_csd_ioctl(struct drm_device *dev, void *data, 380 struct drm_file *file_priv); 381 int v3d_wait_bo_ioctl(struct drm_device *dev, void *data, 382 struct drm_file *file_priv); 383 void v3d_job_cleanup(struct v3d_job *job); 384 void v3d_job_put(struct v3d_job *job); 385 void v3d_reset(struct v3d_dev *v3d); 386 void v3d_invalidate_caches(struct v3d_dev *v3d); 387 void v3d_clean_caches(struct v3d_dev *v3d); 388 389 /* v3d_irq.c */ 390 int v3d_irq_init(struct v3d_dev *v3d); 391 void v3d_irq_enable(struct v3d_dev *v3d); 392 void v3d_irq_disable(struct v3d_dev *v3d); 393 void v3d_irq_reset(struct v3d_dev *v3d); 394 395 /* v3d_mmu.c */ 396 int v3d_mmu_get_offset(struct drm_file *file_priv, struct v3d_bo *bo, 397 u32 *offset); 398 int v3d_mmu_set_page_table(struct v3d_dev *v3d); 399 void v3d_mmu_insert_ptes(struct v3d_bo *bo); 400 void v3d_mmu_remove_ptes(struct v3d_bo *bo); 401 402 /* v3d_sched.c */ 403 int v3d_sched_init(struct v3d_dev *v3d); 404 void v3d_sched_fini(struct v3d_dev *v3d); 405 406 /* v3d_perfmon.c */ 407 void v3d_perfmon_get(struct v3d_perfmon *perfmon); 408 void v3d_perfmon_put(struct v3d_perfmon *perfmon); 409 void v3d_perfmon_start(struct v3d_dev *v3d, struct v3d_perfmon *perfmon); 410 void v3d_perfmon_stop(struct v3d_dev *v3d, struct v3d_perfmon *perfmon, 411 bool capture); 412 struct v3d_perfmon *v3d_perfmon_find(struct v3d_file_priv *v3d_priv, int id); 413 void v3d_perfmon_open_file(struct v3d_file_priv *v3d_priv); 414 void v3d_perfmon_close_file(struct v3d_file_priv *v3d_priv); 415 int v3d_perfmon_create_ioctl(struct drm_device *dev, void *data, 416 struct drm_file *file_priv); 417 int v3d_perfmon_destroy_ioctl(struct drm_device *dev, void *data, 418 struct drm_file *file_priv); 419 int v3d_perfmon_get_values_ioctl(struct drm_device *dev, void *data, 420 struct drm_file *file_priv); 421