kernel/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c

   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
  37 static 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         BUG_ON(!kq || !dev);
  45         BUG_ON(type != KFD_QUEUE_TYPE_DIQ && type != KFD_QUEUE_TYPE_HIQ);
  46
  47         pr_debug("amdkfd: In func %s initializing queue type %d size %d\n",
  48                         __func__, KFD_QUEUE_TYPE_HIQ, queue_size);
  49
  50         nop.opcode = IT_NOP;
  51         nop.type = PM4_TYPE_3;
  52         nop.u32all |= PM4_COUNT_ZERO;
  53
  54         kq->dev = dev;
  55         kq->nop_packet = nop.u32all;
  56         switch (type) {
  57         case KFD_QUEUE_TYPE_DIQ:
  58         case KFD_QUEUE_TYPE_HIQ:
  59                 kq->mqd = dev->dqm->ops.get_mqd_manager(dev->dqm,
  60                                                 KFD_MQD_TYPE_HIQ);
  61                 break;
  62         default:
  63                 BUG();
  64                 break;
  65         }
  66
  67         if (kq->mqd == NULL)
  68                 return false;
  69
  70         prop.doorbell_ptr = kfd_get_kernel_doorbell(dev, &prop.doorbell_off);
  71
  72         if (prop.doorbell_ptr == NULL) {
  73                 pr_err("amdkfd: error init doorbell");
  74                 goto err_get_kernel_doorbell;
  75         }
  76
  77         retval = kfd_gtt_sa_allocate(dev, queue_size, &kq->pq);
  78         if (retval != 0) {
  79                 pr_err("amdkfd: error init pq queues size (%d)\n", queue_size);
  80                 goto err_pq_allocate_vidmem;
  81         }
  82
  83         kq->pq_kernel_addr = kq->pq->cpu_ptr;
  84         kq->pq_gpu_addr = kq->pq->gpu_addr;
  85
  86         retval = kq->ops_asic_specific.initialize(kq, dev, type, queue_size);
  87         if (retval == false)
  88                 goto err_eop_allocate_vidmem;
  89
  90         retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->rptr_kernel),
  91                                         &kq->rptr_mem);
  92
  93         if (retval != 0)
  94                 goto err_rptr_allocate_vidmem;
  95
  96         kq->rptr_kernel = kq->rptr_mem->cpu_ptr;
  97         kq->rptr_gpu_addr = kq->rptr_mem->gpu_addr;
  98
  99         retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->wptr_kernel),
 100                                         &kq->wptr_mem);
 101
 102         if (retval != 0)
 103                 goto err_wptr_allocate_vidmem;
 104
 105         kq->wptr_kernel = kq->wptr_mem->cpu_ptr;
 106         kq->wptr_gpu_addr = kq->wptr_mem->gpu_addr;
 107
 108         memset(kq->pq_kernel_addr, 0, queue_size);
 109         memset(kq->rptr_kernel, 0, sizeof(*kq->rptr_kernel));
 110         memset(kq->wptr_kernel, 0, sizeof(*kq->wptr_kernel));
 111
 112         prop.queue_size = queue_size;
 113         prop.is_interop = false;
 114         prop.priority = 1;
 115         prop.queue_percent = 100;
 116         prop.type = type;
 117         prop.vmid = 0;
 118         prop.queue_address = kq->pq_gpu_addr;
 119         prop.read_ptr = (uint32_t *) kq->rptr_gpu_addr;
 120         prop.write_ptr = (uint32_t *) kq->wptr_gpu_addr;
 121         prop.eop_ring_buffer_address = kq->eop_gpu_addr;
 122         prop.eop_ring_buffer_size = PAGE_SIZE;
 123
 124         if (init_queue(&kq->queue, prop) != 0)
 125                 goto err_init_queue;
 126
 127         kq->queue->device = dev;
 128         kq->queue->process = kfd_get_process(current);
 129
 130         retval = kq->mqd->init_mqd(kq->mqd, &kq->queue->mqd,
 131                                         &kq->queue->mqd_mem_obj,
 132                                         &kq->queue->gart_mqd_addr,
 133                                         &kq->queue->properties);
 134         if (retval != 0)
 135                 goto err_init_mqd;
 136
 137         /* assign HIQ to HQD */
 138         if (type == KFD_QUEUE_TYPE_HIQ) {
 139                 pr_debug("assigning hiq to hqd\n");
 140                 kq->queue->pipe = KFD_CIK_HIQ_PIPE;
 141                 kq->queue->queue = KFD_CIK_HIQ_QUEUE;
 142                 kq->mqd->load_mqd(kq->mqd, kq->queue->mqd, kq->queue->pipe,
 143                                         kq->queue->queue, NULL);
 144         } else {
 145                 /* allocate fence for DIQ */
 146
 147                 retval = kfd_gtt_sa_allocate(dev, sizeof(uint32_t),
 148                                                 &kq->fence_mem_obj);
 149
 150                 if (retval != 0)
 151                         goto err_alloc_fence;
 152
 153                 kq->fence_kernel_address = kq->fence_mem_obj->cpu_ptr;
 154                 kq->fence_gpu_addr = kq->fence_mem_obj->gpu_addr;
 155         }
 156
 157         print_queue(kq->queue);
 158
 159         return true;
 160 err_alloc_fence:
 161 err_init_mqd:
 162         uninit_queue(kq->queue);
 163 err_init_queue:
 164         kfd_gtt_sa_free(dev, kq->wptr_mem);
 165 err_wptr_allocate_vidmem:
 166         kfd_gtt_sa_free(dev, kq->rptr_mem);
 167 err_rptr_allocate_vidmem:
 168         kfd_gtt_sa_free(dev, kq->eop_mem);
 169 err_eop_allocate_vidmem:
 170         kfd_gtt_sa_free(dev, kq->pq);
 171 err_pq_allocate_vidmem:
 172         kfd_release_kernel_doorbell(dev, prop.doorbell_ptr);
 173 err_get_kernel_doorbell:
 174         return false;
 175
 176 }
 177
 178 static void uninitialize(struct kernel_queue *kq)
 179 {
 180         BUG_ON(!kq);
 181
 182         if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ)
 183                 kq->mqd->destroy_mqd(kq->mqd,
 184                                         NULL,
 185                                         false,
 186                                         QUEUE_PREEMPT_DEFAULT_TIMEOUT_MS,
 187                                         kq->queue->pipe,
 188                                         kq->queue->queue);
 189         else if (kq->queue->properties.type == KFD_QUEUE_TYPE_DIQ)
 190                 kfd_gtt_sa_free(kq->dev, kq->fence_mem_obj);
 191
 192         kq->mqd->uninit_mqd(kq->mqd, kq->queue->mqd, kq->queue->mqd_mem_obj);
 193
 194         kfd_gtt_sa_free(kq->dev, kq->rptr_mem);
 195         kfd_gtt_sa_free(kq->dev, kq->wptr_mem);
 196         kq->ops_asic_specific.uninitialize(kq);
 197         kfd_gtt_sa_free(kq->dev, kq->pq);
 198         kfd_release_kernel_doorbell(kq->dev,
 199                                         kq->queue->properties.doorbell_ptr);
 200         uninit_queue(kq->queue);
 201 }
 202
 203 static int acquire_packet_buffer(struct kernel_queue *kq,
 204                 size_t packet_size_in_dwords, unsigned int **buffer_ptr)
 205 {
 206         size_t available_size;
 207         size_t queue_size_dwords;
 208         uint32_t wptr, rptr;
 209         unsigned int *queue_address;
 210
 211         BUG_ON(!kq || !buffer_ptr);
 212
 213         rptr = *kq->rptr_kernel;
 214         wptr = *kq->wptr_kernel;
 215         queue_address = (unsigned int *)kq->pq_kernel_addr;
 216         queue_size_dwords = kq->queue->properties.queue_size / sizeof(uint32_t);
 217
 218         pr_debug("amdkfd: In func %s\nrptr: %d\nwptr: %d\nqueue_address 0x%p\n",
 219                         __func__, rptr, wptr, queue_address);
 220
 221         available_size = (rptr - 1 - wptr + queue_size_dwords) %
 222                                                         queue_size_dwords;
 223
 224         if (packet_size_in_dwords >= queue_size_dwords ||
 225                         packet_size_in_dwords >= available_size) {
 226                 /*
 227                  * make sure calling functions know
 228                  * acquire_packet_buffer() failed
 229                  */
 230                 *buffer_ptr = NULL;
 231                 return -ENOMEM;
 232         }
 233
 234         if (wptr + packet_size_in_dwords >= queue_size_dwords) {
 235                 while (wptr > 0) {
 236                         queue_address[wptr] = kq->nop_packet;
 237                         wptr = (wptr + 1) % queue_size_dwords;
 238                 }
 239         }
 240
 241         *buffer_ptr = &queue_address[wptr];
 242         kq->pending_wptr = wptr + packet_size_in_dwords;
 243
 244         return 0;
 245 }
 246
 247 static void submit_packet(struct kernel_queue *kq)
 248 {
 249 #ifdef DEBUG
 250         int i;
 251 #endif
 252
 253         BUG_ON(!kq);
 254
 255 #ifdef DEBUG
 256         for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) {
 257                 pr_debug("0x%2X ", kq->pq_kernel_addr[i]);
 258                 if (i % 15 == 0)
 259                         pr_debug("\n");
 260         }
 261         pr_debug("\n");
 262 #endif
 263
 264         *kq->wptr_kernel = kq->pending_wptr;
 265         write_kernel_doorbell(kq->queue->properties.doorbell_ptr,
 266                                 kq->pending_wptr);
 267 }
 268
 269 static void rollback_packet(struct kernel_queue *kq)
 270 {
 271         BUG_ON(!kq);
 272         kq->pending_wptr = *kq->queue->properties.write_ptr;
 273 }
 274
 275 struct kernel_queue *kernel_queue_init(struct kfd_dev *dev,
 276                                         enum kfd_queue_type type)
 277 {
 278         struct kernel_queue *kq;
 279
 280         BUG_ON(!dev);
 281
 282         kq = kzalloc(sizeof(struct kernel_queue), GFP_KERNEL);
 283         if (!kq)
 284                 return NULL;
 285
 286         kq->ops.initialize = initialize;
 287         kq->ops.uninitialize = uninitialize;
 288         kq->ops.acquire_packet_buffer = acquire_packet_buffer;
 289         kq->ops.submit_packet = submit_packet;
 290         kq->ops.rollback_packet = rollback_packet;
 291
 292         switch (dev->device_info->asic_family) {
 293         case CHIP_CARRIZO:
 294                 kernel_queue_init_vi(&kq->ops_asic_specific);
 295                 break;
 296
 297         case CHIP_KAVERI:
 298                 kernel_queue_init_cik(&kq->ops_asic_specific);
 299                 break;
 300         }
 301
 302         if (kq->ops.initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE) == false) {
 303                 pr_err("amdkfd: failed to init kernel queue\n");
 304                 kfree(kq);
 305                 return NULL;
 306         }
 307         return kq;
 308 }
 309
 310 void kernel_queue_uninit(struct kernel_queue *kq)
 311 {
 312         BUG_ON(!kq);
 313
 314         kq->ops.uninitialize(kq);
 315         kfree(kq);
 316 }
 317
 318 static __attribute__((unused)) void test_kq(struct kfd_dev *dev)
 319 {
 320         struct kernel_queue *kq;
 321         uint32_t *buffer, i;
 322         int retval;
 323
 324         BUG_ON(!dev);
 325
 326         pr_err("amdkfd: starting kernel queue test\n");
 327
 328         kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ);
 329         BUG_ON(!kq);
 330
 331         retval = kq->ops.acquire_packet_buffer(kq, 5, &buffer);
 332         BUG_ON(retval != 0);
 333         for (i = 0; i < 5; i++)
 334                 buffer[i] = kq->nop_packet;
 335         kq->ops.submit_packet(kq);
 336
 337         pr_err("amdkfd: ending kernel queue test\n");
 338 }
 339
 340