1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2022-2024, Advanced Micro Devices, Inc. 4 */ 5 6 #include <drm/amdxdna_accel.h> 7 #include <drm/drm_device.h> 8 #include <drm/drm_drv.h> 9 #include <drm/drm_file.h> 10 #include <drm/drm_gem.h> 11 #include <drm/drm_gem_shmem_helper.h> 12 #include <drm/drm_print.h> 13 #include <drm/gpu_scheduler.h> 14 #include <linux/xarray.h> 15 #include <trace/events/amdxdna.h> 16 17 #include "amdxdna_ctx.h" 18 #include "amdxdna_gem.h" 19 #include "amdxdna_pci_drv.h" 20 21 #define MAX_HWCTX_ID 255 22 #define MAX_ARG_COUNT 4095 23 24 struct amdxdna_fence { 25 struct dma_fence base; 26 spinlock_t lock; /* for base */ 27 struct amdxdna_hwctx *hwctx; 28 }; 29 30 static const char *amdxdna_fence_get_driver_name(struct dma_fence *fence) 31 { 32 return KBUILD_MODNAME; 33 } 34 35 static const char *amdxdna_fence_get_timeline_name(struct dma_fence *fence) 36 { 37 struct amdxdna_fence *xdna_fence; 38 39 xdna_fence = container_of(fence, struct amdxdna_fence, base); 40 41 return xdna_fence->hwctx->name; 42 } 43 44 static const struct dma_fence_ops fence_ops = { 45 .get_driver_name = amdxdna_fence_get_driver_name, 46 .get_timeline_name = amdxdna_fence_get_timeline_name, 47 }; 48 49 static struct dma_fence *amdxdna_fence_create(struct amdxdna_hwctx *hwctx) 50 { 51 struct amdxdna_fence *fence; 52 53 fence = kzalloc(sizeof(*fence), GFP_KERNEL); 54 if (!fence) 55 return NULL; 56 57 fence->hwctx = hwctx; 58 spin_lock_init(&fence->lock); 59 dma_fence_init(&fence->base, &fence_ops, &fence->lock, hwctx->id, 0); 60 return &fence->base; 61 } 62 63 static void amdxdna_hwctx_destroy_rcu(struct amdxdna_hwctx *hwctx, 64 struct srcu_struct *ss) 65 { 66 struct amdxdna_dev *xdna = hwctx->client->xdna; 67 68 synchronize_srcu(ss); 69 70 /* At this point, user is not able to submit new commands */ 71 xdna->dev_info->ops->hwctx_fini(hwctx); 72 73 kfree(hwctx->name); 74 kfree(hwctx); 75 } 76 77 int amdxdna_hwctx_walk(struct amdxdna_client *client, void *arg, 78 int (*walk)(struct amdxdna_hwctx *hwctx, void *arg)) 79 { 80 struct amdxdna_hwctx *hwctx; 81 unsigned long hwctx_id; 82 int ret = 0, idx; 83 84 idx = srcu_read_lock(&client->hwctx_srcu); 85 amdxdna_for_each_hwctx(client, hwctx_id, hwctx) { 86 ret = walk(hwctx, arg); 87 if (ret) 88 break; 89 } 90 srcu_read_unlock(&client->hwctx_srcu, idx); 91 92 return ret; 93 } 94 95 void *amdxdna_cmd_get_payload(struct amdxdna_gem_obj *abo, u32 *size) 96 { 97 struct amdxdna_cmd *cmd = abo->mem.kva; 98 u32 num_masks, count; 99 100 if (amdxdna_cmd_get_op(abo) == ERT_CMD_CHAIN) 101 num_masks = 0; 102 else 103 num_masks = 1 + FIELD_GET(AMDXDNA_CMD_EXTRA_CU_MASK, cmd->header); 104 105 if (size) { 106 count = FIELD_GET(AMDXDNA_CMD_COUNT, cmd->header); 107 if (unlikely(count <= num_masks)) { 108 *size = 0; 109 return NULL; 110 } 111 *size = (count - num_masks) * sizeof(u32); 112 } 113 return &cmd->data[num_masks]; 114 } 115 116 int amdxdna_cmd_get_cu_idx(struct amdxdna_gem_obj *abo) 117 { 118 struct amdxdna_cmd *cmd = abo->mem.kva; 119 u32 num_masks, i; 120 u32 *cu_mask; 121 122 if (amdxdna_cmd_get_op(abo) == ERT_CMD_CHAIN) 123 return -1; 124 125 num_masks = 1 + FIELD_GET(AMDXDNA_CMD_EXTRA_CU_MASK, cmd->header); 126 cu_mask = cmd->data; 127 for (i = 0; i < num_masks; i++) { 128 if (cu_mask[i]) 129 return ffs(cu_mask[i]) - 1; 130 } 131 132 return -1; 133 } 134 135 /* 136 * This should be called in close() and remove(). DO NOT call in other syscalls. 137 * This guarantee that when hwctx and resources will be released, if user 138 * doesn't call amdxdna_drm_destroy_hwctx_ioctl. 139 */ 140 void amdxdna_hwctx_remove_all(struct amdxdna_client *client) 141 { 142 struct amdxdna_hwctx *hwctx; 143 unsigned long hwctx_id; 144 145 amdxdna_for_each_hwctx(client, hwctx_id, hwctx) { 146 XDNA_DBG(client->xdna, "PID %d close HW context %d", 147 client->pid, hwctx->id); 148 xa_erase(&client->hwctx_xa, hwctx->id); 149 amdxdna_hwctx_destroy_rcu(hwctx, &client->hwctx_srcu); 150 } 151 } 152 153 int amdxdna_drm_create_hwctx_ioctl(struct drm_device *dev, void *data, struct drm_file *filp) 154 { 155 struct amdxdna_client *client = filp->driver_priv; 156 struct amdxdna_drm_create_hwctx *args = data; 157 struct amdxdna_dev *xdna = to_xdna_dev(dev); 158 struct amdxdna_hwctx *hwctx; 159 int ret, idx; 160 161 if (args->ext || args->ext_flags) 162 return -EINVAL; 163 164 hwctx = kzalloc(sizeof(*hwctx), GFP_KERNEL); 165 if (!hwctx) 166 return -ENOMEM; 167 168 if (copy_from_user(&hwctx->qos, u64_to_user_ptr(args->qos_p), sizeof(hwctx->qos))) { 169 XDNA_ERR(xdna, "Access QoS info failed"); 170 kfree(hwctx); 171 return -EFAULT; 172 } 173 174 hwctx->client = client; 175 hwctx->fw_ctx_id = -1; 176 hwctx->num_tiles = args->num_tiles; 177 hwctx->mem_size = args->mem_size; 178 hwctx->max_opc = args->max_opc; 179 180 guard(mutex)(&xdna->dev_lock); 181 182 if (!drm_dev_enter(dev, &idx)) { 183 ret = -ENODEV; 184 goto free_hwctx; 185 } 186 187 ret = xdna->dev_info->ops->hwctx_init(hwctx); 188 if (ret) { 189 XDNA_ERR(xdna, "Init hwctx failed, ret %d", ret); 190 goto dev_exit; 191 } 192 193 hwctx->name = kasprintf(GFP_KERNEL, "hwctx.%d.%d", client->pid, hwctx->fw_ctx_id); 194 if (!hwctx->name) { 195 ret = -ENOMEM; 196 goto fini_hwctx; 197 } 198 199 ret = xa_alloc_cyclic(&client->hwctx_xa, &hwctx->id, hwctx, 200 XA_LIMIT(AMDXDNA_INVALID_CTX_HANDLE + 1, MAX_HWCTX_ID), 201 &client->next_hwctxid, GFP_KERNEL); 202 if (ret < 0) { 203 XDNA_ERR(xdna, "Allocate hwctx ID failed, ret %d", ret); 204 goto free_name; 205 } 206 207 args->handle = hwctx->id; 208 args->syncobj_handle = hwctx->syncobj_hdl; 209 210 atomic64_set(&hwctx->job_submit_cnt, 0); 211 atomic64_set(&hwctx->job_free_cnt, 0); 212 XDNA_DBG(xdna, "PID %d create HW context %d, ret %d", client->pid, args->handle, ret); 213 drm_dev_exit(idx); 214 return 0; 215 216 free_name: 217 kfree(hwctx->name); 218 fini_hwctx: 219 xdna->dev_info->ops->hwctx_fini(hwctx); 220 dev_exit: 221 drm_dev_exit(idx); 222 free_hwctx: 223 kfree(hwctx); 224 return ret; 225 } 226 227 int amdxdna_drm_destroy_hwctx_ioctl(struct drm_device *dev, void *data, struct drm_file *filp) 228 { 229 struct amdxdna_client *client = filp->driver_priv; 230 struct amdxdna_drm_destroy_hwctx *args = data; 231 struct amdxdna_dev *xdna = to_xdna_dev(dev); 232 struct amdxdna_hwctx *hwctx; 233 int ret = 0, idx; 234 235 if (XDNA_MBZ_DBG(xdna, &args->pad, sizeof(args->pad))) 236 return -EINVAL; 237 238 if (!drm_dev_enter(dev, &idx)) 239 return -ENODEV; 240 241 mutex_lock(&xdna->dev_lock); 242 hwctx = xa_erase(&client->hwctx_xa, args->handle); 243 if (!hwctx) { 244 ret = -EINVAL; 245 XDNA_DBG(xdna, "PID %d HW context %d not exist", 246 client->pid, args->handle); 247 goto out; 248 } 249 250 /* 251 * The pushed jobs are handled by DRM scheduler during destroy. 252 * SRCU to synchronize with exec command ioctls. 253 */ 254 amdxdna_hwctx_destroy_rcu(hwctx, &client->hwctx_srcu); 255 256 XDNA_DBG(xdna, "PID %d destroyed HW context %d", client->pid, args->handle); 257 out: 258 mutex_unlock(&xdna->dev_lock); 259 drm_dev_exit(idx); 260 return ret; 261 } 262 263 int amdxdna_drm_config_hwctx_ioctl(struct drm_device *dev, void *data, struct drm_file *filp) 264 { 265 struct amdxdna_client *client = filp->driver_priv; 266 struct amdxdna_drm_config_hwctx *args = data; 267 struct amdxdna_dev *xdna = to_xdna_dev(dev); 268 struct amdxdna_hwctx *hwctx; 269 int ret, idx; 270 u32 buf_size; 271 void *buf; 272 u64 val; 273 274 if (XDNA_MBZ_DBG(xdna, &args->pad, sizeof(args->pad))) 275 return -EINVAL; 276 277 if (!xdna->dev_info->ops->hwctx_config) 278 return -EOPNOTSUPP; 279 280 val = args->param_val; 281 buf_size = args->param_val_size; 282 283 switch (args->param_type) { 284 case DRM_AMDXDNA_HWCTX_CONFIG_CU: 285 /* For those types that param_val is pointer */ 286 if (buf_size > PAGE_SIZE) { 287 XDNA_ERR(xdna, "Config CU param buffer too large"); 288 return -E2BIG; 289 } 290 291 /* Hwctx needs to keep buf */ 292 buf = kzalloc(PAGE_SIZE, GFP_KERNEL); 293 if (!buf) 294 return -ENOMEM; 295 296 if (copy_from_user(buf, u64_to_user_ptr(val), buf_size)) { 297 kfree(buf); 298 return -EFAULT; 299 } 300 301 break; 302 case DRM_AMDXDNA_HWCTX_ASSIGN_DBG_BUF: 303 case DRM_AMDXDNA_HWCTX_REMOVE_DBG_BUF: 304 /* For those types that param_val is a value */ 305 buf = NULL; 306 buf_size = 0; 307 break; 308 default: 309 XDNA_DBG(xdna, "Unknown HW context config type %d", args->param_type); 310 return -EINVAL; 311 } 312 313 mutex_lock(&xdna->dev_lock); 314 idx = srcu_read_lock(&client->hwctx_srcu); 315 hwctx = xa_load(&client->hwctx_xa, args->handle); 316 if (!hwctx) { 317 XDNA_DBG(xdna, "PID %d failed to get hwctx %d", client->pid, args->handle); 318 ret = -EINVAL; 319 goto unlock_srcu; 320 } 321 322 ret = xdna->dev_info->ops->hwctx_config(hwctx, args->param_type, val, buf, buf_size); 323 324 unlock_srcu: 325 srcu_read_unlock(&client->hwctx_srcu, idx); 326 mutex_unlock(&xdna->dev_lock); 327 kfree(buf); 328 return ret; 329 } 330 331 static void 332 amdxdna_arg_bos_put(struct amdxdna_sched_job *job) 333 { 334 int i; 335 336 for (i = 0; i < job->bo_cnt; i++) { 337 if (!job->bos[i]) 338 break; 339 drm_gem_object_put(job->bos[i]); 340 } 341 } 342 343 static int 344 amdxdna_arg_bos_lookup(struct amdxdna_client *client, 345 struct amdxdna_sched_job *job, 346 u32 *bo_hdls, u32 bo_cnt) 347 { 348 struct drm_gem_object *gobj; 349 int i, ret; 350 351 job->bo_cnt = bo_cnt; 352 for (i = 0; i < job->bo_cnt; i++) { 353 struct amdxdna_gem_obj *abo; 354 355 gobj = drm_gem_object_lookup(client->filp, bo_hdls[i]); 356 if (!gobj) { 357 ret = -ENOENT; 358 goto put_shmem_bo; 359 } 360 abo = to_xdna_obj(gobj); 361 362 mutex_lock(&abo->lock); 363 if (abo->pinned) { 364 mutex_unlock(&abo->lock); 365 job->bos[i] = gobj; 366 continue; 367 } 368 369 ret = amdxdna_gem_pin_nolock(abo); 370 if (ret) { 371 mutex_unlock(&abo->lock); 372 drm_gem_object_put(gobj); 373 goto put_shmem_bo; 374 } 375 abo->pinned = true; 376 mutex_unlock(&abo->lock); 377 378 job->bos[i] = gobj; 379 } 380 381 return 0; 382 383 put_shmem_bo: 384 amdxdna_arg_bos_put(job); 385 return ret; 386 } 387 388 void amdxdna_sched_job_cleanup(struct amdxdna_sched_job *job) 389 { 390 trace_amdxdna_debug_point(job->hwctx->name, job->seq, "job release"); 391 amdxdna_arg_bos_put(job); 392 amdxdna_gem_put_obj(job->cmd_bo); 393 } 394 395 int amdxdna_cmd_submit(struct amdxdna_client *client, 396 u32 cmd_bo_hdl, u32 *arg_bo_hdls, u32 arg_bo_cnt, 397 u32 hwctx_hdl, u64 *seq) 398 { 399 struct amdxdna_dev *xdna = client->xdna; 400 struct amdxdna_sched_job *job; 401 struct amdxdna_hwctx *hwctx; 402 int ret, idx; 403 404 XDNA_DBG(xdna, "Command BO hdl %d, Arg BO count %d", cmd_bo_hdl, arg_bo_cnt); 405 job = kzalloc(struct_size(job, bos, arg_bo_cnt), GFP_KERNEL); 406 if (!job) 407 return -ENOMEM; 408 409 if (cmd_bo_hdl != AMDXDNA_INVALID_BO_HANDLE) { 410 job->cmd_bo = amdxdna_gem_get_obj(client, cmd_bo_hdl, AMDXDNA_BO_CMD); 411 if (!job->cmd_bo) { 412 XDNA_ERR(xdna, "Failed to get cmd bo from %d", cmd_bo_hdl); 413 ret = -EINVAL; 414 goto free_job; 415 } 416 } else { 417 job->cmd_bo = NULL; 418 } 419 420 ret = amdxdna_arg_bos_lookup(client, job, arg_bo_hdls, arg_bo_cnt); 421 if (ret) { 422 XDNA_ERR(xdna, "Argument BOs lookup failed, ret %d", ret); 423 goto cmd_put; 424 } 425 426 idx = srcu_read_lock(&client->hwctx_srcu); 427 hwctx = xa_load(&client->hwctx_xa, hwctx_hdl); 428 if (!hwctx) { 429 XDNA_DBG(xdna, "PID %d failed to get hwctx %d", 430 client->pid, hwctx_hdl); 431 ret = -EINVAL; 432 goto unlock_srcu; 433 } 434 435 436 job->hwctx = hwctx; 437 job->mm = current->mm; 438 439 job->fence = amdxdna_fence_create(hwctx); 440 if (!job->fence) { 441 XDNA_ERR(xdna, "Failed to create fence"); 442 ret = -ENOMEM; 443 goto unlock_srcu; 444 } 445 kref_init(&job->refcnt); 446 447 ret = xdna->dev_info->ops->cmd_submit(hwctx, job, seq); 448 if (ret) 449 goto put_fence; 450 451 /* 452 * The amdxdna_hwctx_destroy_rcu() will release hwctx and associated 453 * resource after synchronize_srcu(). The submitted jobs should be 454 * handled by the queue, for example DRM scheduler, in device layer. 455 * For here we can unlock SRCU. 456 */ 457 srcu_read_unlock(&client->hwctx_srcu, idx); 458 trace_amdxdna_debug_point(hwctx->name, *seq, "job pushed"); 459 460 return 0; 461 462 put_fence: 463 dma_fence_put(job->fence); 464 unlock_srcu: 465 srcu_read_unlock(&client->hwctx_srcu, idx); 466 amdxdna_arg_bos_put(job); 467 cmd_put: 468 amdxdna_gem_put_obj(job->cmd_bo); 469 free_job: 470 kfree(job); 471 return ret; 472 } 473 474 /* 475 * The submit command ioctl submits a command to firmware. One firmware command 476 * may contain multiple command BOs for processing as a whole. 477 * The command sequence number is returned which can be used for wait command ioctl. 478 */ 479 static int amdxdna_drm_submit_execbuf(struct amdxdna_client *client, 480 struct amdxdna_drm_exec_cmd *args) 481 { 482 struct amdxdna_dev *xdna = client->xdna; 483 u32 *arg_bo_hdls = NULL; 484 u32 cmd_bo_hdl; 485 int ret; 486 487 if (args->arg_count > MAX_ARG_COUNT) { 488 XDNA_ERR(xdna, "Invalid arg bo count %d", args->arg_count); 489 return -EINVAL; 490 } 491 492 /* Only support single command for now. */ 493 if (args->cmd_count != 1) { 494 XDNA_ERR(xdna, "Invalid cmd bo count %d", args->cmd_count); 495 return -EINVAL; 496 } 497 498 cmd_bo_hdl = (u32)args->cmd_handles; 499 if (args->arg_count) { 500 arg_bo_hdls = kcalloc(args->arg_count, sizeof(u32), GFP_KERNEL); 501 if (!arg_bo_hdls) 502 return -ENOMEM; 503 ret = copy_from_user(arg_bo_hdls, u64_to_user_ptr(args->args), 504 args->arg_count * sizeof(u32)); 505 if (ret) { 506 ret = -EFAULT; 507 goto free_cmd_bo_hdls; 508 } 509 } 510 511 ret = amdxdna_cmd_submit(client, cmd_bo_hdl, arg_bo_hdls, 512 args->arg_count, args->hwctx, &args->seq); 513 if (ret) 514 XDNA_DBG(xdna, "Submit cmds failed, ret %d", ret); 515 516 free_cmd_bo_hdls: 517 kfree(arg_bo_hdls); 518 if (!ret) 519 XDNA_DBG(xdna, "Pushed cmd %lld to scheduler", args->seq); 520 return ret; 521 } 522 523 int amdxdna_drm_submit_cmd_ioctl(struct drm_device *dev, void *data, struct drm_file *filp) 524 { 525 struct amdxdna_client *client = filp->driver_priv; 526 struct amdxdna_drm_exec_cmd *args = data; 527 528 if (args->ext || args->ext_flags) 529 return -EINVAL; 530 531 switch (args->type) { 532 case AMDXDNA_CMD_SUBMIT_EXEC_BUF: 533 return amdxdna_drm_submit_execbuf(client, args); 534 } 535 536 XDNA_ERR(client->xdna, "Invalid command type %d", args->type); 537 return -EINVAL; 538 } 539