LXR linux/drivers/gpu/drm/amd/amdkfd/kfd_kernel

   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
  24#include <linux/types.h>
  25#include <linux/mutex.h>
  26#include <linux/slab.h>
  27#include <linux/printk.h>
  28#include <linux/sched.h>
  29#include "kfd_kernel_queue.h"
  30#include "kfd_priv.h"
  31#include "kfd_device_queue_manager.h"
  32#include "kfd_pm4_headers.h"
  33#include "kfd_pm4_opcodes.h"
  34
  35#define PM4_COUNT_ZERO (((1 << 15) - 1) << 16)
  36
  37static bool initialize(struct kernel_queue *kq, struct kfd_dev *dev,
  38                enum kfd_queue_type type, unsigned int queue_size)
  39{
  40        struct queue_properties prop;
  41        int retval;
  42        union PM4_MES_TYPE_3_HEADER nop;
  43
  44        if (WARN_ON(type != KFD_QUEUE_TYPE_DIQ && type != KFD_QUEUE_TYPE_HIQ))
  45                return false;
  46
  47        pr_debug("Initializing queue type %d size %d\n", KFD_QUEUE_TYPE_HIQ,
  48                        queue_size);
  49
  50        memset(&prop, 0, sizeof(prop));
  51        memset(&nop, 0, sizeof(nop));
  52
  53        nop.opcode = IT_NOP;
  54        nop.type = PM4_TYPE_3;
  55        nop.u32all |= PM4_COUNT_ZERO;
  56
  57        kq->dev = dev;
  58        kq->nop_packet = nop.u32all;
  59        switch (type) {
  60        case KFD_QUEUE_TYPE_DIQ:
  61                kq->mqd_mgr = dev->dqm->mqd_mgrs[KFD_MQD_TYPE_DIQ];
  62                break;
  63        case KFD_QUEUE_TYPE_HIQ:
  64                kq->mqd_mgr = dev->dqm->mqd_mgrs[KFD_MQD_TYPE_HIQ];
  65                break;
  66        default:
  67                pr_err("Invalid queue type %d\n", type);
  68                return false;
  69        }
  70
  71        if (!kq->mqd_mgr)
  72                return false;
  73
  74        prop.doorbell_ptr = kfd_get_kernel_doorbell(dev, &prop.doorbell_off);
  75
  76        if (!prop.doorbell_ptr) {
  77                pr_err("Failed to initialize doorbell");
  78                goto err_get_kernel_doorbell;
  79        }
  80
  81        retval = kfd_gtt_sa_allocate(dev, queue_size, &kq->pq);
  82        if (retval != 0) {
  83                pr_err("Failed to init pq queues size %d\n", queue_size);
  84                goto err_pq_allocate_vidmem;
  85        }
  86
  87        kq->pq_kernel_addr = kq->pq->cpu_ptr;
  88        kq->pq_gpu_addr = kq->pq->gpu_addr;
  89
  90        retval = kq->ops_asic_specific.initialize(kq, dev, type, queue_size);
  91        if (!retval)
  92                goto err_eop_allocate_vidmem;
  93
  94        retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->rptr_kernel),
  95                                        &kq->rptr_mem);
  96
  97        if (retval != 0)
  98                goto err_rptr_allocate_vidmem;
  99
 100        kq->rptr_kernel = kq->rptr_mem->cpu_ptr;
 101        kq->rptr_gpu_addr = kq->rptr_mem->gpu_addr;
 102
 103        retval = kfd_gtt_sa_allocate(dev, dev->device_info->doorbell_size,
 104                                        &kq->wptr_mem);
 105
 106        if (retval != 0)
 107                goto err_wptr_allocate_vidmem;
 108
 109        kq->wptr_kernel = kq->wptr_mem->cpu_ptr;
 110        kq->wptr_gpu_addr = kq->wptr_mem->gpu_addr;
 111
 112        memset(kq->pq_kernel_addr, 0, queue_size);
 113        memset(kq->rptr_kernel, 0, sizeof(*kq->rptr_kernel));
 114        memset(kq->wptr_kernel, 0, sizeof(*kq->wptr_kernel));
 115
 116        prop.queue_size = queue_size;
 117        prop.is_interop = false;
 118        prop.priority = 1;
 119        prop.queue_percent = 100;
 120        prop.type = type;
 121        prop.vmid = 0;
 122        prop.queue_address = kq->pq_gpu_addr;
 123        prop.read_ptr = (uint32_t *) kq->rptr_gpu_addr;
 124        prop.write_ptr = (uint32_t *) kq->wptr_gpu_addr;
 125        prop.eop_ring_buffer_address = kq->eop_gpu_addr;
 126        prop.eop_ring_buffer_size = PAGE_SIZE;
 127        prop.cu_mask = NULL;
 128
 129        if (init_queue(&kq->queue, &prop) != 0)
 130                goto err_init_queue;
 131
 132        kq->queue->device = dev;
 133        kq->queue->process = kfd_get_process(current);
 134
 135        kq->queue->mqd_mem_obj = kq->mqd_mgr->allocate_mqd(kq->mqd_mgr->dev,
 136                                        &kq->queue->properties);
 137        if (!kq->queue->mqd_mem_obj)
 138                goto err_allocate_mqd;
 139        kq->mqd_mgr->init_mqd(kq->mqd_mgr, &kq->queue->mqd,
 140                                        kq->queue->mqd_mem_obj,
 141                                        &kq->queue->gart_mqd_addr,
 142                                        &kq->queue->properties);
 143        /* assign HIQ to HQD */
 144        if (type == KFD_QUEUE_TYPE_HIQ) {
 145                pr_debug("Assigning hiq to hqd\n");
 146                kq->queue->pipe = KFD_CIK_HIQ_PIPE;
 147                kq->queue->queue = KFD_CIK_HIQ_QUEUE;
 148                kq->mqd_mgr->load_mqd(kq->mqd_mgr, kq->queue->mqd,
 149                                kq->queue->pipe, kq->queue->queue,
 150                                &kq->queue->properties, NULL);
 151        } else {
 152                /* allocate fence for DIQ */
 153
 154                retval = kfd_gtt_sa_allocate(dev, sizeof(uint32_t),
 155                                                &kq->fence_mem_obj);
 156
 157                if (retval != 0)
 158                        goto err_alloc_fence;
 159
 160                kq->fence_kernel_address = kq->fence_mem_obj->cpu_ptr;
 161                kq->fence_gpu_addr = kq->fence_mem_obj->gpu_addr;
 162        }
 163
 164        print_queue(kq->queue);
 165
 166        return true;
 167err_alloc_fence:
 168        kq->mqd_mgr->free_mqd(kq->mqd_mgr, kq->queue->mqd, kq->queue->mqd_mem_obj);
 169err_allocate_mqd:
 170        uninit_queue(kq->queue);
 171err_init_queue:
 172        kfd_gtt_sa_free(dev, kq->wptr_mem);
 173err_wptr_allocate_vidmem:
 174        kfd_gtt_sa_free(dev, kq->rptr_mem);
 175err_rptr_allocate_vidmem:
 176        kfd_gtt_sa_free(dev, kq->eop_mem);
 177err_eop_allocate_vidmem:
 178        kfd_gtt_sa_free(dev, kq->pq);
 179err_pq_allocate_vidmem:
 180        kfd_release_kernel_doorbell(dev, prop.doorbell_ptr);
 181err_get_kernel_doorbell:
 182        return false;
 183
 184}
 185
 186static void uninitialize(struct kernel_queue *kq)
 187{
 188        if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ)
 189                kq->mqd_mgr->destroy_mqd(kq->mqd_mgr,
 190                                        kq->queue->mqd,
 191                                        KFD_PREEMPT_TYPE_WAVEFRONT_RESET,
 192                                        KFD_UNMAP_LATENCY_MS,
 193                                        kq->queue->pipe,
 194                                        kq->queue->queue);
 195        else if (kq->queue->properties.type == KFD_QUEUE_TYPE_DIQ)
 196                kfd_gtt_sa_free(kq->dev, kq->fence_mem_obj);
 197
 198        kq->mqd_mgr->free_mqd(kq->mqd_mgr, kq->queue->mqd,
 199                                kq->queue->mqd_mem_obj);
 200
 201        kfd_gtt_sa_free(kq->dev, kq->rptr_mem);
 202        kfd_gtt_sa_free(kq->dev, kq->wptr_mem);
 203        kq->ops_asic_specific.uninitialize(kq);
 204        kfd_gtt_sa_free(kq->dev, kq->pq);
 205        kfd_release_kernel_doorbell(kq->dev,
 206                                        kq->queue->properties.doorbell_ptr);
 207        uninit_queue(kq->queue);
 208}
 209
 210static int acquire_packet_buffer(struct kernel_queue *kq,
 211                size_t packet_size_in_dwords, unsigned int **buffer_ptr)
 212{
 213        size_t available_size;
 214        size_t queue_size_dwords;
 215        uint32_t wptr, rptr;
 216        uint64_t wptr64;
 217        unsigned int *queue_address;
 218
 219        /* When rptr == wptr, the buffer is empty.
 220         * When rptr == wptr + 1, the buffer is full.
 221         * It is always rptr that advances to the position of wptr, rather than
 222         * the opposite. So we can only use up to queue_size_dwords - 1 dwords.
 223         */
 224        rptr = *kq->rptr_kernel;
 225        wptr = kq->pending_wptr;
 226        wptr64 = kq->pending_wptr64;
 227        queue_address = (unsigned int *)kq->pq_kernel_addr;
 228        queue_size_dwords = kq->queue->properties.queue_size / 4;
 229
 230        pr_debug("rptr: %d\n", rptr);
 231        pr_debug("wptr: %d\n", wptr);
 232        pr_debug("queue_address 0x%p\n", queue_address);
 233
 234        available_size = (rptr + queue_size_dwords - 1 - wptr) %
 235                                                        queue_size_dwords;
 236
 237        if (packet_size_in_dwords > available_size) {
 238                /*
 239                 * make sure calling functions know
 240                 * acquire_packet_buffer() failed
 241                 */
 242                goto err_no_space;
 243        }
 244
 245        if (wptr + packet_size_in_dwords >= queue_size_dwords) {
 246                /* make sure after rolling back to position 0, there is
 247                 * still enough space.
 248                 */
 249                if (packet_size_in_dwords >= rptr)
 250                        goto err_no_space;
 251
 252                /* fill nops, roll back and start at position 0 */
 253                while (wptr > 0) {
 254                        queue_address[wptr] = kq->nop_packet;
 255                        wptr = (wptr + 1) % queue_size_dwords;
 256                        wptr64++;
 257                }
 258        }
 259
 260        *buffer_ptr = &queue_address[wptr];
 261        kq->pending_wptr = wptr + packet_size_in_dwords;
 262        kq->pending_wptr64 = wptr64 + packet_size_in_dwords;
 263
 264        return 0;
 265
 266err_no_space:
 267        *buffer_ptr = NULL;
 268        return -ENOMEM;
 269}
 270
 271static void submit_packet(struct kernel_queue *kq)
 272{
 273#ifdef DEBUG
 274        int i;
 275
 276        for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) {
 277                pr_debug("0x%2X ", kq->pq_kernel_addr[i]);
 278                if (i % 15 == 0)
 279                        pr_debug("\n");
 280        }
 281        pr_debug("\n");
 282#endif
 283
 284        kq->ops_asic_specific.submit_packet(kq);
 285}
 286
 287static void rollback_packet(struct kernel_queue *kq)
 288{
 289        if (kq->dev->device_info->doorbell_size == 8) {
 290                kq->pending_wptr64 = *kq->wptr64_kernel;
 291                kq->pending_wptr = *kq->wptr_kernel %
 292                        (kq->queue->properties.queue_size / 4);
 293        } else {
 294                kq->pending_wptr = *kq->wptr_kernel;
 295        }
 296}
 297
 298struct kernel_queue *kernel_queue_init(struct kfd_dev *dev,
 299                                        enum kfd_queue_type type)
 300{
 301        struct kernel_queue *kq;
 302
 303        kq = kzalloc(sizeof(*kq), GFP_KERNEL);
 304        if (!kq)
 305                return NULL;
 306
 307        kq->ops.initialize = initialize;
 308        kq->ops.uninitialize = uninitialize;
 309        kq->ops.acquire_packet_buffer = acquire_packet_buffer;
 310        kq->ops.submit_packet = submit_packet;
 311        kq->ops.rollback_packet = rollback_packet;
 312
 313        switch (dev->device_info->asic_family) {
 314        case CHIP_CARRIZO:
 315        case CHIP_TONGA:
 316        case CHIP_FIJI:
 317        case CHIP_POLARIS10:
 318        case CHIP_POLARIS11:
 319        case CHIP_POLARIS12:
 320        case CHIP_VEGAM:
 321                kernel_queue_init_vi(&kq->ops_asic_specific);
 322                break;
 323
 324        case CHIP_KAVERI:
 325        case CHIP_HAWAII:
 326                kernel_queue_init_cik(&kq->ops_asic_specific);
 327                break;
 328
 329        case CHIP_VEGA10:
 330        case CHIP_VEGA12:
 331        case CHIP_VEGA20:
 332        case CHIP_RAVEN:
 333                kernel_queue_init_v9(&kq->ops_asic_specific);
 334                break;
 335        case CHIP_NAVI10:
 336                kernel_queue_init_v10(&kq->ops_asic_specific);
 337                break;
 338        default:
 339                WARN(1, "Unexpected ASIC family %u",
 340                     dev->device_info->asic_family);
 341                goto out_free;
 342        }
 343
 344        if (kq->ops.initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE))
 345                return kq;
 346
 347        pr_err("Failed to init kernel queue\n");
 348
 349out_free:
 350        kfree(kq);
 351        return NULL;
 352}
 353
 354void kernel_queue_uninit(struct kernel_queue *kq)
 355{
 356        kq->ops.uninitialize(kq);
 357        kfree(kq);
 358}
 359
 360/* FIXME: Can this test be removed? */
 361static __attribute__((unused)) void test_kq(struct kfd_dev *dev)
 362{
 363        struct kernel_queue *kq;
 364        uint32_t *buffer, i;
 365        int retval;
 366
 367        pr_err("Starting kernel queue test\n");
 368
 369        kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ);
 370        if (unlikely(!kq)) {
 371                pr_err("  Failed to initialize HIQ\n");
 372                pr_err("Kernel queue test failed\n");
 373                return;
 374        }
 375
 376        retval = kq->ops.acquire_packet_buffer(kq, 5, &buffer);
 377        if (unlikely(retval != 0)) {
 378                pr_err("  Failed to acquire packet buffer\n");
 379                pr_err("Kernel queue test failed\n");
 380                return;
 381        }
 382        for (i = 0; i < 5; i++)
 383                buffer[i] = kq->nop_packet;
 384        kq->ops.submit_packet(kq);
 385
 386        pr_err("Ending kernel queue test\n");
 387}
 388
 389
 390