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