377 lines
10 KiB
C
377 lines
10 KiB
C
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// SPDX-License-Identifier: GPL-2.0 OR MIT
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/*
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* Copyright 2014-2022 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include <linux/types.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include <linux/printk.h>
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#include <linux/sched.h>
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#include "kfd_kernel_queue.h"
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#include "kfd_priv.h"
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#include "kfd_device_queue_manager.h"
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#include "kfd_pm4_headers.h"
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#include "kfd_pm4_opcodes.h"
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#define PM4_COUNT_ZERO (((1 << 15) - 1) << 16)
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/* Initialize a kernel queue, including allocations of GART memory
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* needed for the queue.
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*/
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static bool kq_initialize(struct kernel_queue *kq, struct kfd_dev *dev,
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enum kfd_queue_type type, unsigned int queue_size)
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{
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struct queue_properties prop;
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int retval;
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union PM4_MES_TYPE_3_HEADER nop;
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if (WARN_ON(type != KFD_QUEUE_TYPE_DIQ && type != KFD_QUEUE_TYPE_HIQ))
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return false;
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pr_debug("Initializing queue type %d size %d\n", KFD_QUEUE_TYPE_HIQ,
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queue_size);
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memset(&prop, 0, sizeof(prop));
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memset(&nop, 0, sizeof(nop));
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nop.opcode = IT_NOP;
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nop.type = PM4_TYPE_3;
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nop.u32all |= PM4_COUNT_ZERO;
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kq->dev = dev;
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kq->nop_packet = nop.u32all;
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switch (type) {
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case KFD_QUEUE_TYPE_DIQ:
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kq->mqd_mgr = dev->dqm->mqd_mgrs[KFD_MQD_TYPE_DIQ];
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break;
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case KFD_QUEUE_TYPE_HIQ:
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kq->mqd_mgr = dev->dqm->mqd_mgrs[KFD_MQD_TYPE_HIQ];
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break;
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default:
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pr_err("Invalid queue type %d\n", type);
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return false;
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}
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if (!kq->mqd_mgr)
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return false;
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prop.doorbell_ptr = kfd_get_kernel_doorbell(dev, &prop.doorbell_off);
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if (!prop.doorbell_ptr) {
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pr_err("Failed to initialize doorbell");
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goto err_get_kernel_doorbell;
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}
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retval = kfd_gtt_sa_allocate(dev, queue_size, &kq->pq);
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if (retval != 0) {
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pr_err("Failed to init pq queues size %d\n", queue_size);
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goto err_pq_allocate_vidmem;
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}
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kq->pq_kernel_addr = kq->pq->cpu_ptr;
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kq->pq_gpu_addr = kq->pq->gpu_addr;
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/* For CIK family asics, kq->eop_mem is not needed */
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if (dev->adev->asic_type > CHIP_MULLINS) {
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retval = kfd_gtt_sa_allocate(dev, PAGE_SIZE, &kq->eop_mem);
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if (retval != 0)
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goto err_eop_allocate_vidmem;
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kq->eop_gpu_addr = kq->eop_mem->gpu_addr;
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kq->eop_kernel_addr = kq->eop_mem->cpu_ptr;
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memset(kq->eop_kernel_addr, 0, PAGE_SIZE);
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}
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retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->rptr_kernel),
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&kq->rptr_mem);
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if (retval != 0)
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goto err_rptr_allocate_vidmem;
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kq->rptr_kernel = kq->rptr_mem->cpu_ptr;
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kq->rptr_gpu_addr = kq->rptr_mem->gpu_addr;
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retval = kfd_gtt_sa_allocate(dev, dev->device_info.doorbell_size,
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&kq->wptr_mem);
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if (retval != 0)
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goto err_wptr_allocate_vidmem;
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kq->wptr_kernel = kq->wptr_mem->cpu_ptr;
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kq->wptr_gpu_addr = kq->wptr_mem->gpu_addr;
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memset(kq->pq_kernel_addr, 0, queue_size);
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memset(kq->rptr_kernel, 0, sizeof(*kq->rptr_kernel));
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memset(kq->wptr_kernel, 0, sizeof(*kq->wptr_kernel));
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prop.queue_size = queue_size;
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prop.is_interop = false;
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prop.is_gws = false;
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prop.priority = 1;
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prop.queue_percent = 100;
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prop.type = type;
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prop.vmid = 0;
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prop.queue_address = kq->pq_gpu_addr;
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prop.read_ptr = (uint32_t *) kq->rptr_gpu_addr;
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prop.write_ptr = (uint32_t *) kq->wptr_gpu_addr;
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prop.eop_ring_buffer_address = kq->eop_gpu_addr;
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prop.eop_ring_buffer_size = PAGE_SIZE;
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if (init_queue(&kq->queue, &prop) != 0)
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goto err_init_queue;
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kq->queue->device = dev;
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kq->queue->process = kfd_get_process(current);
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kq->queue->mqd_mem_obj = kq->mqd_mgr->allocate_mqd(kq->mqd_mgr->dev,
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&kq->queue->properties);
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if (!kq->queue->mqd_mem_obj)
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goto err_allocate_mqd;
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kq->mqd_mgr->init_mqd(kq->mqd_mgr, &kq->queue->mqd,
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kq->queue->mqd_mem_obj,
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&kq->queue->gart_mqd_addr,
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&kq->queue->properties);
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/* assign HIQ to HQD */
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if (type == KFD_QUEUE_TYPE_HIQ) {
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pr_debug("Assigning hiq to hqd\n");
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kq->queue->pipe = KFD_CIK_HIQ_PIPE;
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kq->queue->queue = KFD_CIK_HIQ_QUEUE;
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kq->mqd_mgr->load_mqd(kq->mqd_mgr, kq->queue->mqd,
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kq->queue->pipe, kq->queue->queue,
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&kq->queue->properties, NULL);
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} else {
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/* allocate fence for DIQ */
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retval = kfd_gtt_sa_allocate(dev, sizeof(uint32_t),
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&kq->fence_mem_obj);
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if (retval != 0)
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goto err_alloc_fence;
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kq->fence_kernel_address = kq->fence_mem_obj->cpu_ptr;
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kq->fence_gpu_addr = kq->fence_mem_obj->gpu_addr;
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}
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print_queue(kq->queue);
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return true;
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err_alloc_fence:
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kq->mqd_mgr->free_mqd(kq->mqd_mgr, kq->queue->mqd, kq->queue->mqd_mem_obj);
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err_allocate_mqd:
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uninit_queue(kq->queue);
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err_init_queue:
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kfd_gtt_sa_free(dev, kq->wptr_mem);
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err_wptr_allocate_vidmem:
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kfd_gtt_sa_free(dev, kq->rptr_mem);
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err_rptr_allocate_vidmem:
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kfd_gtt_sa_free(dev, kq->eop_mem);
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err_eop_allocate_vidmem:
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kfd_gtt_sa_free(dev, kq->pq);
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err_pq_allocate_vidmem:
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kfd_release_kernel_doorbell(dev, prop.doorbell_ptr);
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err_get_kernel_doorbell:
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return false;
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}
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/* Uninitialize a kernel queue and free all its memory usages. */
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static void kq_uninitialize(struct kernel_queue *kq, bool hanging)
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{
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if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ && !hanging)
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kq->mqd_mgr->destroy_mqd(kq->mqd_mgr,
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kq->queue->mqd,
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KFD_PREEMPT_TYPE_WAVEFRONT_RESET,
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KFD_UNMAP_LATENCY_MS,
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kq->queue->pipe,
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kq->queue->queue);
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else if (kq->queue->properties.type == KFD_QUEUE_TYPE_DIQ)
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kfd_gtt_sa_free(kq->dev, kq->fence_mem_obj);
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kq->mqd_mgr->free_mqd(kq->mqd_mgr, kq->queue->mqd,
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kq->queue->mqd_mem_obj);
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kfd_gtt_sa_free(kq->dev, kq->rptr_mem);
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kfd_gtt_sa_free(kq->dev, kq->wptr_mem);
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/* For CIK family asics, kq->eop_mem is Null, kfd_gtt_sa_free()
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* is able to handle NULL properly.
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*/
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kfd_gtt_sa_free(kq->dev, kq->eop_mem);
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kfd_gtt_sa_free(kq->dev, kq->pq);
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kfd_release_kernel_doorbell(kq->dev,
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kq->queue->properties.doorbell_ptr);
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uninit_queue(kq->queue);
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}
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int kq_acquire_packet_buffer(struct kernel_queue *kq,
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size_t packet_size_in_dwords, unsigned int **buffer_ptr)
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{
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size_t available_size;
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size_t queue_size_dwords;
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uint32_t wptr, rptr;
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uint64_t wptr64;
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unsigned int *queue_address;
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/* When rptr == wptr, the buffer is empty.
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* When rptr == wptr + 1, the buffer is full.
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* It is always rptr that advances to the position of wptr, rather than
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* the opposite. So we can only use up to queue_size_dwords - 1 dwords.
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*/
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rptr = *kq->rptr_kernel;
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wptr = kq->pending_wptr;
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wptr64 = kq->pending_wptr64;
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queue_address = (unsigned int *)kq->pq_kernel_addr;
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queue_size_dwords = kq->queue->properties.queue_size / 4;
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pr_debug("rptr: %d\n", rptr);
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pr_debug("wptr: %d\n", wptr);
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pr_debug("queue_address 0x%p\n", queue_address);
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available_size = (rptr + queue_size_dwords - 1 - wptr) %
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queue_size_dwords;
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if (packet_size_in_dwords > available_size) {
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/*
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* make sure calling functions know
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* acquire_packet_buffer() failed
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*/
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goto err_no_space;
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}
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if (wptr + packet_size_in_dwords >= queue_size_dwords) {
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/* make sure after rolling back to position 0, there is
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* still enough space.
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*/
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if (packet_size_in_dwords >= rptr)
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goto err_no_space;
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/* fill nops, roll back and start at position 0 */
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while (wptr > 0) {
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queue_address[wptr] = kq->nop_packet;
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wptr = (wptr + 1) % queue_size_dwords;
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wptr64++;
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}
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}
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*buffer_ptr = &queue_address[wptr];
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kq->pending_wptr = wptr + packet_size_in_dwords;
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kq->pending_wptr64 = wptr64 + packet_size_in_dwords;
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return 0;
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err_no_space:
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*buffer_ptr = NULL;
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return -ENOMEM;
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}
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void kq_submit_packet(struct kernel_queue *kq)
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{
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#ifdef DEBUG
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int i;
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for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) {
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pr_debug("0x%2X ", kq->pq_kernel_addr[i]);
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if (i % 15 == 0)
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pr_debug("\n");
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}
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pr_debug("\n");
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#endif
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if (kq->dev->device_info.doorbell_size == 8) {
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*kq->wptr64_kernel = kq->pending_wptr64;
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write_kernel_doorbell64(kq->queue->properties.doorbell_ptr,
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kq->pending_wptr64);
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} else {
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*kq->wptr_kernel = kq->pending_wptr;
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write_kernel_doorbell(kq->queue->properties.doorbell_ptr,
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kq->pending_wptr);
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}
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}
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void kq_rollback_packet(struct kernel_queue *kq)
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{
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if (kq->dev->device_info.doorbell_size == 8) {
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kq->pending_wptr64 = *kq->wptr64_kernel;
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kq->pending_wptr = *kq->wptr_kernel %
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(kq->queue->properties.queue_size / 4);
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} else {
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kq->pending_wptr = *kq->wptr_kernel;
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}
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}
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struct kernel_queue *kernel_queue_init(struct kfd_dev *dev,
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enum kfd_queue_type type)
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{
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struct kernel_queue *kq;
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kq = kzalloc(sizeof(*kq), GFP_KERNEL);
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if (!kq)
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return NULL;
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if (kq_initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE))
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return kq;
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pr_err("Failed to init kernel queue\n");
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kfree(kq);
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return NULL;
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}
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void kernel_queue_uninit(struct kernel_queue *kq, bool hanging)
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{
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kq_uninitialize(kq, hanging);
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|
|
kfree(kq);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* FIXME: Can this test be removed? */
|
||
|
|
static __attribute__((unused)) void test_kq(struct kfd_dev *dev)
|
||
|
|
{
|
||
|
|
struct kernel_queue *kq;
|
||
|
|
uint32_t *buffer, i;
|
||
|
|
int retval;
|
||
|
|
|
||
|
|
pr_err("Starting kernel queue test\n");
|
||
|
|
|
||
|
|
kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ);
|
||
|
|
if (unlikely(!kq)) {
|
||
|
|
pr_err(" Failed to initialize HIQ\n");
|
||
|
|
pr_err("Kernel queue test failed\n");
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
retval = kq_acquire_packet_buffer(kq, 5, &buffer);
|
||
|
|
if (unlikely(retval != 0)) {
|
||
|
|
pr_err(" Failed to acquire packet buffer\n");
|
||
|
|
pr_err("Kernel queue test failed\n");
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
for (i = 0; i < 5; i++)
|
||
|
|
buffer[i] = kq->nop_packet;
|
||
|
|
kq_submit_packet(kq);
|
||
|
|
|
||
|
|
pr_err("Ending kernel queue test\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
|