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1// SPDX-License-Identifier: GPL-2.0 OR MIT2/*3 * Copyright 2014-2022 Advanced Micro Devices, Inc.4 *5 * Permission is hereby granted, free of charge, to any person obtaining a6 * copy of this software and associated documentation files (the "Software"),7 * to deal in the Software without restriction, including without limitation8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,9 * and/or sell copies of the Software, and to permit persons to whom the10 * Software is furnished to do so, subject to the following conditions:11 *12 * The above copyright notice and this permission notice shall be included in13 * all copies or substantial portions of the Software.14 *15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR21 * OTHER DEALINGS IN THE SOFTWARE.22 *23 */24 25#include <linux/types.h>26#include <linux/mutex.h>27#include <linux/slab.h>28#include <linux/printk.h>29#include <linux/sched.h>30#include "kfd_kernel_queue.h"31#include "kfd_priv.h"32#include "kfd_device_queue_manager.h"33#include "kfd_pm4_headers.h"34#include "kfd_pm4_opcodes.h"35#include "amdgpu_reset.h"36 37#define PM4_COUNT_ZERO (((1 << 15) - 1) << 16)38 39/* Initialize a kernel queue, including allocations of GART memory40 * needed for the queue.41 */42static bool kq_initialize(struct kernel_queue *kq, struct kfd_node *dev,43 enum kfd_queue_type type, unsigned int queue_size)44{45 struct queue_properties prop;46 int retval;47 union PM4_MES_TYPE_3_HEADER nop;48 49 if (WARN_ON(type != KFD_QUEUE_TYPE_DIQ && type != KFD_QUEUE_TYPE_HIQ))50 return false;51 52 pr_debug("Initializing queue type %d size %d\n", KFD_QUEUE_TYPE_HIQ,53 queue_size);54 55 memset(&prop, 0, sizeof(prop));56 memset(&nop, 0, sizeof(nop));57 58 nop.opcode = IT_NOP;59 nop.type = PM4_TYPE_3;60 nop.u32all |= PM4_COUNT_ZERO;61 62 kq->dev = dev;63 kq->nop_packet = nop.u32all;64 switch (type) {65 case KFD_QUEUE_TYPE_DIQ:66 kq->mqd_mgr = dev->dqm->mqd_mgrs[KFD_MQD_TYPE_DIQ];67 break;68 case KFD_QUEUE_TYPE_HIQ:69 kq->mqd_mgr = dev->dqm->mqd_mgrs[KFD_MQD_TYPE_HIQ];70 break;71 default:72 dev_err(dev->adev->dev, "Invalid queue type %d\n", type);73 return false;74 }75 76 if (!kq->mqd_mgr)77 return false;78 79 prop.doorbell_ptr = kfd_get_kernel_doorbell(dev->kfd, &prop.doorbell_off);80 81 if (!prop.doorbell_ptr) {82 dev_err(dev->adev->dev, "Failed to initialize doorbell");83 goto err_get_kernel_doorbell;84 }85 86 retval = kfd_gtt_sa_allocate(dev, queue_size, &kq->pq);87 if (retval != 0) {88 dev_err(dev->adev->dev, "Failed to init pq queues size %d\n",89 queue_size);90 goto err_pq_allocate_vidmem;91 }92 93 kq->pq_kernel_addr = kq->pq->cpu_ptr;94 kq->pq_gpu_addr = kq->pq->gpu_addr;95 96 /* For CIK family asics, kq->eop_mem is not needed */97 if (dev->adev->asic_type > CHIP_MULLINS) {98 retval = kfd_gtt_sa_allocate(dev, PAGE_SIZE, &kq->eop_mem);99 if (retval != 0)100 goto err_eop_allocate_vidmem;101 102 kq->eop_gpu_addr = kq->eop_mem->gpu_addr;103 kq->eop_kernel_addr = kq->eop_mem->cpu_ptr;104 105 memset(kq->eop_kernel_addr, 0, PAGE_SIZE);106 }107 108 retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->rptr_kernel),109 &kq->rptr_mem);110 111 if (retval != 0)112 goto err_rptr_allocate_vidmem;113 114 kq->rptr_kernel = kq->rptr_mem->cpu_ptr;115 kq->rptr_gpu_addr = kq->rptr_mem->gpu_addr;116 117 retval = kfd_gtt_sa_allocate(dev, dev->kfd->device_info.doorbell_size,118 &kq->wptr_mem);119 120 if (retval != 0)121 goto err_wptr_allocate_vidmem;122 123 kq->wptr_kernel = kq->wptr_mem->cpu_ptr;124 kq->wptr_gpu_addr = kq->wptr_mem->gpu_addr;125 126 memset(kq->pq_kernel_addr, 0, queue_size);127 memset(kq->rptr_kernel, 0, sizeof(*kq->rptr_kernel));128 memset(kq->wptr_kernel, 0, sizeof(*kq->wptr_kernel));129 130 prop.queue_size = queue_size;131 prop.is_interop = false;132 prop.is_gws = false;133 prop.priority = 1;134 prop.queue_percent = 100;135 prop.type = type;136 prop.vmid = 0;137 prop.queue_address = kq->pq_gpu_addr;138 prop.read_ptr = (uint32_t *) kq->rptr_gpu_addr;139 prop.write_ptr = (uint32_t *) kq->wptr_gpu_addr;140 prop.eop_ring_buffer_address = kq->eop_gpu_addr;141 prop.eop_ring_buffer_size = PAGE_SIZE;142 143 if (init_queue(&kq->queue, &prop) != 0)144 goto err_init_queue;145 146 kq->queue->device = dev;147 kq->queue->process = kfd_get_process(current);148 149 kq->queue->mqd_mem_obj = kq->mqd_mgr->allocate_mqd(kq->mqd_mgr->dev,150 &kq->queue->properties);151 if (!kq->queue->mqd_mem_obj)152 goto err_allocate_mqd;153 kq->mqd_mgr->init_mqd(kq->mqd_mgr, &kq->queue->mqd,154 kq->queue->mqd_mem_obj,155 &kq->queue->gart_mqd_addr,156 &kq->queue->properties);157 /* assign HIQ to HQD */158 if (type == KFD_QUEUE_TYPE_HIQ) {159 pr_debug("Assigning hiq to hqd\n");160 kq->queue->pipe = KFD_CIK_HIQ_PIPE;161 kq->queue->queue = KFD_CIK_HIQ_QUEUE;162 kq->mqd_mgr->load_mqd(kq->mqd_mgr, kq->queue->mqd,163 kq->queue->pipe, kq->queue->queue,164 &kq->queue->properties, NULL);165 } else {166 /* allocate fence for DIQ */167 168 retval = kfd_gtt_sa_allocate(dev, sizeof(uint32_t),169 &kq->fence_mem_obj);170 171 if (retval != 0)172 goto err_alloc_fence;173 174 kq->fence_kernel_address = kq->fence_mem_obj->cpu_ptr;175 kq->fence_gpu_addr = kq->fence_mem_obj->gpu_addr;176 }177 178 print_queue(kq->queue);179 180 return true;181err_alloc_fence:182 kq->mqd_mgr->free_mqd(kq->mqd_mgr, kq->queue->mqd, kq->queue->mqd_mem_obj);183err_allocate_mqd:184 uninit_queue(kq->queue);185err_init_queue:186 kfd_gtt_sa_free(dev, kq->wptr_mem);187err_wptr_allocate_vidmem:188 kfd_gtt_sa_free(dev, kq->rptr_mem);189err_rptr_allocate_vidmem:190 kfd_gtt_sa_free(dev, kq->eop_mem);191err_eop_allocate_vidmem:192 kfd_gtt_sa_free(dev, kq->pq);193err_pq_allocate_vidmem:194 kfd_release_kernel_doorbell(dev->kfd, prop.doorbell_ptr);195err_get_kernel_doorbell:196 return false;197 198}199 200/* Uninitialize a kernel queue and free all its memory usages. */201static void kq_uninitialize(struct kernel_queue *kq)202{203 if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ && down_read_trylock(&kq->dev->adev->reset_domain->sem)) {204 kq->mqd_mgr->destroy_mqd(kq->mqd_mgr,205 kq->queue->mqd,206 KFD_PREEMPT_TYPE_WAVEFRONT_RESET,207 KFD_UNMAP_LATENCY_MS,208 kq->queue->pipe,209 kq->queue->queue);210 up_read(&kq->dev->adev->reset_domain->sem);211 }212 else if (kq->queue->properties.type == KFD_QUEUE_TYPE_DIQ)213 kfd_gtt_sa_free(kq->dev, kq->fence_mem_obj);214 215 kq->mqd_mgr->free_mqd(kq->mqd_mgr, kq->queue->mqd,216 kq->queue->mqd_mem_obj);217 218 kfd_gtt_sa_free(kq->dev, kq->rptr_mem);219 kfd_gtt_sa_free(kq->dev, kq->wptr_mem);220 221 /* For CIK family asics, kq->eop_mem is Null, kfd_gtt_sa_free()222 * is able to handle NULL properly.223 */224 kfd_gtt_sa_free(kq->dev, kq->eop_mem);225 226 kfd_gtt_sa_free(kq->dev, kq->pq);227 kfd_release_kernel_doorbell(kq->dev->kfd,228 kq->queue->properties.doorbell_ptr);229 uninit_queue(kq->queue);230}231 232int kq_acquire_packet_buffer(struct kernel_queue *kq,233 size_t packet_size_in_dwords, unsigned int **buffer_ptr)234{235 size_t available_size;236 size_t queue_size_dwords;237 uint32_t wptr, rptr;238 uint64_t wptr64;239 unsigned int *queue_address;240 241 /* When rptr == wptr, the buffer is empty.242 * When rptr == wptr + 1, the buffer is full.243 * It is always rptr that advances to the position of wptr, rather than244 * the opposite. So we can only use up to queue_size_dwords - 1 dwords.245 */246 rptr = *kq->rptr_kernel;247 wptr = kq->pending_wptr;248 wptr64 = kq->pending_wptr64;249 queue_address = (unsigned int *)kq->pq_kernel_addr;250 queue_size_dwords = kq->queue->properties.queue_size / 4;251 252 pr_debug("rptr: %d\n", rptr);253 pr_debug("wptr: %d\n", wptr);254 pr_debug("queue_address 0x%p\n", queue_address);255 256 available_size = (rptr + queue_size_dwords - 1 - wptr) %257 queue_size_dwords;258 259 if (packet_size_in_dwords > available_size) {260 /*261 * make sure calling functions know262 * acquire_packet_buffer() failed263 */264 goto err_no_space;265 }266 267 if (wptr + packet_size_in_dwords >= queue_size_dwords) {268 /* make sure after rolling back to position 0, there is269 * still enough space.270 */271 if (packet_size_in_dwords >= rptr)272 goto err_no_space;273 274 /* fill nops, roll back and start at position 0 */275 while (wptr > 0) {276 queue_address[wptr] = kq->nop_packet;277 wptr = (wptr + 1) % queue_size_dwords;278 wptr64++;279 }280 }281 282 *buffer_ptr = &queue_address[wptr];283 kq->pending_wptr = wptr + packet_size_in_dwords;284 kq->pending_wptr64 = wptr64 + packet_size_in_dwords;285 286 return 0;287 288err_no_space:289 *buffer_ptr = NULL;290 return -ENOMEM;291}292 293int kq_submit_packet(struct kernel_queue *kq)294{295#ifdef DEBUG296 int i;297 298 for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) {299 pr_debug("0x%2X ", kq->pq_kernel_addr[i]);300 if (i % 15 == 0)301 pr_debug("\n");302 }303 pr_debug("\n");304#endif305 /* Fatal err detected, packet submission won't go through */306 if (amdgpu_amdkfd_is_fed(kq->dev->adev))307 return -EIO;308 309 if (kq->dev->kfd->device_info.doorbell_size == 8) {310 *kq->wptr64_kernel = kq->pending_wptr64;311 write_kernel_doorbell64(kq->queue->properties.doorbell_ptr,312 kq->pending_wptr64);313 } else {314 *kq->wptr_kernel = kq->pending_wptr;315 write_kernel_doorbell(kq->queue->properties.doorbell_ptr,316 kq->pending_wptr);317 }318 319 return 0;320}321 322void kq_rollback_packet(struct kernel_queue *kq)323{324 if (kq->dev->kfd->device_info.doorbell_size == 8) {325 kq->pending_wptr64 = *kq->wptr64_kernel;326 kq->pending_wptr = *kq->wptr_kernel %327 (kq->queue->properties.queue_size / 4);328 } else {329 kq->pending_wptr = *kq->wptr_kernel;330 }331}332 333struct kernel_queue *kernel_queue_init(struct kfd_node *dev,334 enum kfd_queue_type type)335{336 struct kernel_queue *kq;337 338 kq = kzalloc(sizeof(*kq), GFP_KERNEL);339 if (!kq)340 return NULL;341 342 if (kq_initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE))343 return kq;344 345 dev_err(dev->adev->dev, "Failed to init kernel queue\n");346 347 kfree(kq);348 return NULL;349}350 351void kernel_queue_uninit(struct kernel_queue *kq)352{353 kq_uninitialize(kq);354 kfree(kq);355}356 357/* FIXME: Can this test be removed? */358static __attribute__((unused)) void test_kq(struct kfd_node *dev)359{360 struct kernel_queue *kq;361 uint32_t *buffer, i;362 int retval;363 364 dev_err(dev->adev->dev, "Starting kernel queue test\n");365 366 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ);367 if (unlikely(!kq)) {368 dev_err(dev->adev->dev, " Failed to initialize HIQ\n");369 dev_err(dev->adev->dev, "Kernel queue test failed\n");370 return;371 }372 373 retval = kq_acquire_packet_buffer(kq, 5, &buffer);374 if (unlikely(retval != 0)) {375 dev_err(dev->adev->dev, " Failed to acquire packet buffer\n");376 dev_err(dev->adev->dev, "Kernel queue test failed\n");377 return;378 }379 for (i = 0; i < 5; i++)380 buffer[i] = kq->nop_packet;381 kq_submit_packet(kq);382 383 dev_err(dev->adev->dev, "Ending kernel queue test\n");384}385 386 387