diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c | 376 |
1 files changed, 376 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c new file mode 100644 index 000000000..1bea629c4 --- /dev/null +++ b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c @@ -0,0 +1,376 @@ +// 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"); +} + + |