drivers/gpu/drm/amd/amdkfd/kfd_priv.h

   1 /*
   2  * Copyright 2014 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  */
  22
  23 #ifndef KFD_PRIV_H_INCLUDED
  24 #define KFD_PRIV_H_INCLUDED
  25
  26 #include <linux/hashtable.h>
  27 #include <linux/mmu_notifier.h>
  28 #include <linux/mutex.h>
  29 #include <linux/types.h>
  30 #include <linux/atomic.h>
  31 #include <linux/workqueue.h>
  32 #include <linux/spinlock.h>
  33 #include <linux/kfd_ioctl.h>
  34 #include <kgd_kfd_interface.h>
  35
  36 #define KFD_SYSFS_FILE_MODE 0444
  37
  38 /*
  39  * When working with cp scheduler we should assign the HIQ manually or via
  40  * the radeon driver to a fixed hqd slot, here are the fixed HIQ hqd slot
  41  * definitions for Kaveri. In Kaveri only the first ME queues participates
  42  * in the cp scheduling taking that in mind we set the HIQ slot in the
  43  * second ME.
  44  */
  45 #define KFD_CIK_HIQ_PIPE 4
  46 #define KFD_CIK_HIQ_QUEUE 0
  47
  48 /* GPU ID hash width in bits */
  49 #define KFD_GPU_ID_HASH_WIDTH 16
  50
  51 /* Macro for allocating structures */
  52 #define kfd_alloc_struct(ptr_to_struct) \
  53         ((typeof(ptr_to_struct)) kzalloc(sizeof(*ptr_to_struct), GFP_KERNEL))
  54
  55 #define KFD_MAX_NUM_OF_PROCESSES 512
  56 #define KFD_MAX_NUM_OF_QUEUES_PER_PROCESS 1024
  57
  58 /*
  59  * Kernel module parameter to specify maximum number of supported queues per
  60  * device
  61  */
  62 extern int max_num_of_queues_per_device;
  63
  64 #define KFD_MAX_NUM_OF_QUEUES_PER_DEVICE_DEFAULT 4096
  65 #define KFD_MAX_NUM_OF_QUEUES_PER_DEVICE                \
  66         (KFD_MAX_NUM_OF_PROCESSES *                     \
  67                         KFD_MAX_NUM_OF_QUEUES_PER_PROCESS)
  68
  69 #define KFD_KERNEL_QUEUE_SIZE 2048
  70
  71 /* Kernel module parameter to specify the scheduling policy */
  72 extern int sched_policy;
  73
  74 /**
  75  * enum kfd_sched_policy
  76  *
  77  * @KFD_SCHED_POLICY_HWS: H/W scheduling policy known as command processor (cp)
  78  * scheduling. In this scheduling mode we're using the firmware code to
  79  * schedule the user mode queues and kernel queues such as HIQ and DIQ.
  80  * the HIQ queue is used as a special queue that dispatches the configuration
  81  * to the cp and the user mode queues list that are currently running.
  82  * the DIQ queue is a debugging queue that dispatches debugging commands to the
  83  * firmware.
  84  * in this scheduling mode user mode queues over subscription feature is
  85  * enabled.
  86  *
  87  * @KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION: The same as above but the over
  88  * subscription feature disabled.
  89  *
  90  * @KFD_SCHED_POLICY_NO_HWS: no H/W scheduling policy is a mode which directly
  91  * set the command processor registers and sets the queues "manually". This
  92  * mode is used *ONLY* for debugging proposes.
  93  *
  94  */
  95 enum kfd_sched_policy {
  96         KFD_SCHED_POLICY_HWS = 0,
  97         KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION,
  98         KFD_SCHED_POLICY_NO_HWS
  99 };
 100
 101 enum cache_policy {
 102         cache_policy_coherent,
 103         cache_policy_noncoherent
 104 };
 105
 106 struct kfd_device_info {
 107         unsigned int max_pasid_bits;
 108         size_t ih_ring_entry_size;
 109         uint16_t mqd_size_aligned;
 110 };
 111
 112 struct kfd_dev {
 113         struct kgd_dev *kgd;
 114
 115         const struct kfd_device_info *device_info;
 116         struct pci_dev *pdev;
 117
 118         unsigned int id;                /* topology stub index */
 119
 120         phys_addr_t doorbell_base;      /* Start of actual doorbells used by
 121                                          * KFD. It is aligned for mapping
 122                                          * into user mode
 123                                          */
 124         size_t doorbell_id_offset;      /* Doorbell offset (from KFD doorbell
 125                                          * to HW doorbell, GFX reserved some
 126                                          * at the start)
 127                                          */
 128         size_t doorbell_process_limit;  /* Number of processes we have doorbell
 129                                          * space for.
 130                                          */
 131         u32 __iomem *doorbell_kernel_ptr; /* This is a pointer for a doorbells
 132                                            * page used by kernel queue
 133                                            */
 134
 135         struct kgd2kfd_shared_resources shared_resources;
 136
 137         /* QCM Device instance */
 138         struct device_queue_manager *dqm;
 139
 140         bool init_complete;
 141 };
 142
 143 /* KGD2KFD callbacks */
 144 void kgd2kfd_exit(void);
 145 struct kfd_dev *kgd2kfd_probe(struct kgd_dev *kgd, struct pci_dev *pdev);
 146 bool kgd2kfd_device_init(struct kfd_dev *kfd,
 147                          const struct kgd2kfd_shared_resources *gpu_resources);
 148 void kgd2kfd_device_exit(struct kfd_dev *kfd);
 149
 150 extern const struct kfd2kgd_calls *kfd2kgd;
 151
 152 struct kfd_mem_obj {
 153         void *bo;
 154         uint64_t gpu_addr;
 155         uint32_t *cpu_ptr;
 156 };
 157
 158 enum kfd_mempool {
 159         KFD_MEMPOOL_SYSTEM_CACHEABLE = 1,
 160         KFD_MEMPOOL_SYSTEM_WRITECOMBINE = 2,
 161         KFD_MEMPOOL_FRAMEBUFFER = 3,
 162 };
 163
 164 /* Character device interface */
 165 int kfd_chardev_init(void);
 166 void kfd_chardev_exit(void);
 167 struct device *kfd_chardev(void);
 168
 169 /**
 170  * enum kfd_preempt_type_filter
 171  *
 172  * @KFD_PREEMPT_TYPE_FILTER_SINGLE_QUEUE: Preempts single queue.
 173  *
 174  * @KFD_PRERMPT_TYPE_FILTER_ALL_QUEUES: Preempts all queues in the
 175  *                                              running queues list.
 176  *
 177  * @KFD_PRERMPT_TYPE_FILTER_BY_PASID: Preempts queues that belongs to
 178  *                                              specific process.
 179  *
 180  */
 181 enum kfd_preempt_type_filter {
 182         KFD_PREEMPT_TYPE_FILTER_SINGLE_QUEUE,
 183         KFD_PREEMPT_TYPE_FILTER_ALL_QUEUES,
 184         KFD_PREEMPT_TYPE_FILTER_BY_PASID
 185 };
 186
 187 enum kfd_preempt_type {
 188         KFD_PREEMPT_TYPE_WAVEFRONT,
 189         KFD_PREEMPT_TYPE_WAVEFRONT_RESET
 190 };
 191
 192 /**
 193  * enum kfd_queue_type
 194  *
 195  * @KFD_QUEUE_TYPE_COMPUTE: Regular user mode queue type.
 196  *
 197  * @KFD_QUEUE_TYPE_SDMA: Sdma user mode queue type.
 198  *
 199  * @KFD_QUEUE_TYPE_HIQ: HIQ queue type.
 200  *
 201  * @KFD_QUEUE_TYPE_DIQ: DIQ queue type.
 202  */
 203 enum kfd_queue_type  {
 204         KFD_QUEUE_TYPE_COMPUTE,
 205         KFD_QUEUE_TYPE_SDMA,
 206         KFD_QUEUE_TYPE_HIQ,
 207         KFD_QUEUE_TYPE_DIQ
 208 };
 209
 210 enum kfd_queue_format {
 211         KFD_QUEUE_FORMAT_PM4,
 212         KFD_QUEUE_FORMAT_AQL
 213 };
 214
 215 /**
 216  * struct queue_properties
 217  *
 218  * @type: The queue type.
 219  *
 220  * @queue_id: Queue identifier.
 221  *
 222  * @queue_address: Queue ring buffer address.
 223  *
 224  * @queue_size: Queue ring buffer size.
 225  *
 226  * @priority: Defines the queue priority relative to other queues in the
 227  * process.
 228  * This is just an indication and HW scheduling may override the priority as
 229  * necessary while keeping the relative prioritization.
 230  * the priority granularity is from 0 to f which f is the highest priority.
 231  * currently all queues are initialized with the highest priority.
 232  *
 233  * @queue_percent: This field is partially implemented and currently a zero in
 234  * this field defines that the queue is non active.
 235  *
 236  * @read_ptr: User space address which points to the number of dwords the
 237  * cp read from the ring buffer. This field updates automatically by the H/W.
 238  *
 239  * @write_ptr: Defines the number of dwords written to the ring buffer.
 240  *
 241  * @doorbell_ptr: This field aim is to notify the H/W of new packet written to
 242  * the queue ring buffer. This field should be similar to write_ptr and the user
 243  * should update this field after he updated the write_ptr.
 244  *
 245  * @doorbell_off: The doorbell offset in the doorbell pci-bar.
 246  *
 247  * @is_interop: Defines if this is a interop queue. Interop queue means that the
 248  * queue can access both graphics and compute resources.
 249  *
 250  * @is_active: Defines if the queue is active or not.
 251  *
 252  * @vmid: If the scheduling mode is no cp scheduling the field defines the vmid
 253  * of the queue.
 254  *
 255  * This structure represents the queue properties for each queue no matter if
 256  * it's user mode or kernel mode queue.
 257  *
 258  */
 259 struct queue_properties {
 260         enum kfd_queue_type type;
 261         enum kfd_queue_format format;
 262         unsigned int queue_id;
 263         uint64_t queue_address;
 264         uint64_t  queue_size;
 265         uint32_t priority;
 266         uint32_t queue_percent;
 267         uint32_t *read_ptr;
 268         uint32_t *write_ptr;
 269         uint32_t __iomem *doorbell_ptr;
 270         uint32_t doorbell_off;
 271         bool is_interop;
 272         bool is_active;
 273         /* Not relevant for user mode queues in cp scheduling */
 274         unsigned int vmid;
 275 };
 276
 277 /**
 278  * struct queue
 279  *
 280  * @list: Queue linked list.
 281  *
 282  * @mqd: The queue MQD.
 283  *
 284  * @mqd_mem_obj: The MQD local gpu memory object.
 285  *
 286  * @gart_mqd_addr: The MQD gart mc address.
 287  *
 288  * @properties: The queue properties.
 289  *
 290  * @mec: Used only in no cp scheduling mode and identifies to micro engine id
 291  * that the queue should be execute on.
 292  *
 293  * @pipe: Used only in no cp scheduling mode and identifies the queue's pipe id.
 294  *
 295  * @queue: Used only in no cp scheduliong mode and identifies the queue's slot.
 296  *
 297  * @process: The kfd process that created this queue.
 298  *
 299  * @device: The kfd device that created this queue.
 300  *
 301  * This structure represents user mode compute queues.
 302  * It contains all the necessary data to handle such queues.
 303  *
 304  */
 305
 306 struct queue {
 307         struct list_head list;
 308         void *mqd;
 309         struct kfd_mem_obj *mqd_mem_obj;
 310         uint64_t gart_mqd_addr;
 311         struct queue_properties properties;
 312
 313         uint32_t mec;
 314         uint32_t pipe;
 315         uint32_t queue;
 316
 317         struct kfd_process      *process;
 318         struct kfd_dev          *device;
 319 };
 320
 321 /*
 322  * Please read the kfd_mqd_manager.h description.
 323  */
 324 enum KFD_MQD_TYPE {
 325         KFD_MQD_TYPE_CIK_COMPUTE = 0, /* for no cp scheduling */
 326         KFD_MQD_TYPE_CIK_HIQ, /* for hiq */
 327         KFD_MQD_TYPE_CIK_CP, /* for cp queues and diq */
 328         KFD_MQD_TYPE_CIK_SDMA, /* for sdma queues */
 329         KFD_MQD_TYPE_MAX
 330 };
 331
 332 struct scheduling_resources {
 333         unsigned int vmid_mask;
 334         enum kfd_queue_type type;
 335         uint64_t queue_mask;
 336         uint64_t gws_mask;
 337         uint32_t oac_mask;
 338         uint32_t gds_heap_base;
 339         uint32_t gds_heap_size;
 340 };
 341
 342 struct process_queue_manager {
 343         /* data */
 344         struct kfd_process      *process;
 345         unsigned int            num_concurrent_processes;
 346         struct list_head        queues;
 347         unsigned long           *queue_slot_bitmap;
 348 };
 349
 350 struct qcm_process_device {
 351         /* The Device Queue Manager that owns this data */
 352         struct device_queue_manager *dqm;
 353         struct process_queue_manager *pqm;
 354         /* Device Queue Manager lock */
 355         struct mutex *lock;
 356         /* Queues list */
 357         struct list_head queues_list;
 358         struct list_head priv_queue_list;
 359
 360         unsigned int queue_count;
 361         unsigned int vmid;
 362         bool is_debug;
 363         /*
 364          * All the memory management data should be here too
 365          */
 366         uint64_t gds_context_area;
 367         uint32_t sh_mem_config;
 368         uint32_t sh_mem_bases;
 369         uint32_t sh_mem_ape1_base;
 370         uint32_t sh_mem_ape1_limit;
 371         uint32_t page_table_base;
 372         uint32_t gds_size;
 373         uint32_t num_gws;
 374         uint32_t num_oac;
 375 };
 376
 377 /* Data that is per-process-per device. */
 378 struct kfd_process_device {
 379         /*
 380          * List of all per-device data for a process.
 381          * Starts from kfd_process.per_device_data.
 382          */
 383         struct list_head per_device_list;
 384
 385         /* The device that owns this data. */
 386         struct kfd_dev *dev;
 387
 388
 389         /* per-process-per device QCM data structure */
 390         struct qcm_process_device qpd;
 391
 392         /*Apertures*/
 393         uint64_t lds_base;
 394         uint64_t lds_limit;
 395         uint64_t gpuvm_base;
 396         uint64_t gpuvm_limit;
 397         uint64_t scratch_base;
 398         uint64_t scratch_limit;
 399
 400         /* Is this process/pasid bound to this device? (amd_iommu_bind_pasid) */
 401         bool bound;
 402 };
 403
 404 #define qpd_to_pdd(x) container_of(x, struct kfd_process_device, qpd)
 405
 406 /* Process data */
 407 struct kfd_process {
 408         /*
 409          * kfd_process are stored in an mm_struct*->kfd_process*
 410          * hash table (kfd_processes in kfd_process.c)
 411          */
 412         struct hlist_node kfd_processes;
 413
 414         struct mm_struct *mm;
 415
 416         struct mutex mutex;
 417
 418         /*
 419          * In any process, the thread that started main() is the lead
 420          * thread and outlives the rest.
 421          * It is here because amd_iommu_bind_pasid wants a task_struct.
 422          */
 423         struct task_struct *lead_thread;
 424
 425         /* We want to receive a notification when the mm_struct is destroyed */
 426         struct mmu_notifier mmu_notifier;
 427
 428         /* Use for delayed freeing of kfd_process structure */
 429         struct rcu_head rcu;
 430
 431         unsigned int pasid;
 432
 433         /*
 434          * List of kfd_process_device structures,
 435          * one for each device the process is using.
 436          */
 437         struct list_head per_device_data;
 438
 439         struct process_queue_manager pqm;
 440
 441         /* The process's queues. */
 442         size_t queue_array_size;
 443
 444         /* Size is queue_array_size, up to MAX_PROCESS_QUEUES. */
 445         struct kfd_queue **queues;
 446
 447         unsigned long allocated_queue_bitmap[DIV_ROUND_UP(KFD_MAX_NUM_OF_QUEUES_PER_PROCESS, BITS_PER_LONG)];
 448
 449         /*Is the user space process 32 bit?*/
 450         bool is_32bit_user_mode;
 451 };
 452
 453 /**
 454  * Ioctl function type.
 455  *
 456  * \param filep pointer to file structure.
 457  * \param p amdkfd process pointer.
 458  * \param data pointer to arg that was copied from user.
 459  */
 460 typedef int amdkfd_ioctl_t(struct file *filep, struct kfd_process *p,
 461                                 void *data);
 462
 463 struct amdkfd_ioctl_desc {
 464         unsigned int cmd;
 465         int flags;
 466         amdkfd_ioctl_t *func;
 467         unsigned int cmd_drv;
 468         const char *name;
 469 };
 470
 471 void kfd_process_create_wq(void);
 472 void kfd_process_destroy_wq(void);
 473 struct kfd_process *kfd_create_process(const struct task_struct *);
 474 struct kfd_process *kfd_get_process(const struct task_struct *);
 475
 476 struct kfd_process_device *kfd_bind_process_to_device(struct kfd_dev *dev,
 477                                                         struct kfd_process *p);
 478 void kfd_unbind_process_from_device(struct kfd_dev *dev, unsigned int pasid);
 479 struct kfd_process_device *kfd_get_process_device_data(struct kfd_dev *dev,
 480                                                         struct kfd_process *p,
 481                                                         int create_pdd);
 482
 483 /* Process device data iterator */
 484 struct kfd_process_device *kfd_get_first_process_device_data(struct kfd_process *p);
 485 struct kfd_process_device *kfd_get_next_process_device_data(struct kfd_process *p,
 486                                                 struct kfd_process_device *pdd);
 487 bool kfd_has_process_device_data(struct kfd_process *p);
 488
 489 /* PASIDs */
 490 int kfd_pasid_init(void);
 491 void kfd_pasid_exit(void);
 492 bool kfd_set_pasid_limit(unsigned int new_limit);
 493 unsigned int kfd_get_pasid_limit(void);
 494 unsigned int kfd_pasid_alloc(void);
 495 void kfd_pasid_free(unsigned int pasid);
 496
 497 /* Doorbells */
 498 void kfd_doorbell_init(struct kfd_dev *kfd);
 499 int kfd_doorbell_mmap(struct kfd_process *process, struct vm_area_struct *vma);
 500 u32 __iomem *kfd_get_kernel_doorbell(struct kfd_dev *kfd,
 501                                         unsigned int *doorbell_off);
 502 void kfd_release_kernel_doorbell(struct kfd_dev *kfd, u32 __iomem *db_addr);
 503 u32 read_kernel_doorbell(u32 __iomem *db);
 504 void write_kernel_doorbell(u32 __iomem *db, u32 value);
 505 unsigned int kfd_queue_id_to_doorbell(struct kfd_dev *kfd,
 506                                         struct kfd_process *process,
 507                                         unsigned int queue_id);
 508
 509 extern struct device *kfd_device;
 510
 511 /* Topology */
 512 int kfd_topology_init(void);
 513 void kfd_topology_shutdown(void);
 514 int kfd_topology_add_device(struct kfd_dev *gpu);
 515 int kfd_topology_remove_device(struct kfd_dev *gpu);
 516 struct kfd_dev *kfd_device_by_id(uint32_t gpu_id);
 517 struct kfd_dev *kfd_device_by_pci_dev(const struct pci_dev *pdev);
 518 struct kfd_dev *kfd_topology_enum_kfd_devices(uint8_t idx);
 519
 520 /* Interrupts */
 521 void kgd2kfd_interrupt(struct kfd_dev *kfd, const void *ih_ring_entry);
 522
 523 /* Power Management */
 524 void kgd2kfd_suspend(struct kfd_dev *kfd);
 525 int kgd2kfd_resume(struct kfd_dev *kfd);
 526
 527 /* amdkfd Apertures */
 528 int kfd_init_apertures(struct kfd_process *process);
 529
 530 /* Queue Context Management */
 531 inline uint32_t lower_32(uint64_t x);
 532 inline uint32_t upper_32(uint64_t x);
 533
 534 int init_queue(struct queue **q, struct queue_properties properties);
 535 void uninit_queue(struct queue *q);
 536 void print_queue_properties(struct queue_properties *q);
 537 void print_queue(struct queue *q);
 538
 539 struct mqd_manager *mqd_manager_init(enum KFD_MQD_TYPE type,
 540                                         struct kfd_dev *dev);
 541 struct device_queue_manager *device_queue_manager_init(struct kfd_dev *dev);
 542 void device_queue_manager_uninit(struct device_queue_manager *dqm);
 543 struct kernel_queue *kernel_queue_init(struct kfd_dev *dev,
 544                                         enum kfd_queue_type type);
 545 void kernel_queue_uninit(struct kernel_queue *kq);
 546
 547 /* Process Queue Manager */
 548 struct process_queue_node {
 549         struct queue *q;
 550         struct kernel_queue *kq;
 551         struct list_head process_queue_list;
 552 };
 553
 554 int pqm_init(struct process_queue_manager *pqm, struct kfd_process *p);
 555 void pqm_uninit(struct process_queue_manager *pqm);
 556 int pqm_create_queue(struct process_queue_manager *pqm,
 557                             struct kfd_dev *dev,
 558                             struct file *f,
 559                             struct queue_properties *properties,
 560                             unsigned int flags,
 561                             enum kfd_queue_type type,
 562                             unsigned int *qid);
 563 int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid);
 564 int pqm_update_queue(struct process_queue_manager *pqm, unsigned int qid,
 565                         struct queue_properties *p);
 566
 567 /* Packet Manager */
 568
 569 #define KFD_HIQ_TIMEOUT (500)
 570
 571 #define KFD_FENCE_COMPLETED (100)
 572 #define KFD_FENCE_INIT   (10)
 573 #define KFD_UNMAP_LATENCY (150)
 574
 575 struct packet_manager {
 576         struct device_queue_manager *dqm;
 577         struct kernel_queue *priv_queue;
 578         struct mutex lock;
 579         bool allocated;
 580         struct kfd_mem_obj *ib_buffer_obj;
 581 };
 582
 583 int pm_init(struct packet_manager *pm, struct device_queue_manager *dqm);
 584 void pm_uninit(struct packet_manager *pm);
 585 int pm_send_set_resources(struct packet_manager *pm,
 586                                 struct scheduling_resources *res);
 587 int pm_send_runlist(struct packet_manager *pm, struct list_head *dqm_queues);
 588 int pm_send_query_status(struct packet_manager *pm, uint64_t fence_address,
 589                                 uint32_t fence_value);
 590
 591 int pm_send_unmap_queue(struct packet_manager *pm, enum kfd_queue_type type,
 592                         enum kfd_preempt_type_filter mode,
 593                         uint32_t filter_param, bool reset,
 594                         unsigned int sdma_engine);
 595
 596 void pm_release_ib(struct packet_manager *pm);
 597
 598 uint64_t kfd_get_number_elems(struct kfd_dev *kfd);
 599 phys_addr_t kfd_get_process_doorbells(struct kfd_dev *dev,
 600                                         struct kfd_process *process);
 601
 602 #endif