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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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#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"#include "amdgpu_reset.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;
pr_debug("Initializing queue type %d size %d\n", type, 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; kq->mqd_mgr = dev->dqm->mqd_mgrs[KFD_MQD_TYPE_HIQ]; if (!kq->mqd_mgr) return false;
prop.doorbell_ptr = kfd_get_kernel_doorbell(dev->kfd, &prop.doorbell_off);
if (!prop.doorbell_ptr) { dev_err(dev->adev->dev, "Failed to initialize doorbell"); goto err_get_kernel_doorbell; }
retval = kfd_gtt_sa_allocate(dev, queue_size, &kq->pq); if (retval != 0) { dev_err(dev->adev->dev, "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, dev->kfd->device_info.doorbell_size);
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->mqd_mem_obj = kq->mqd_mgr->allocate_mqd(kq->mqd_mgr, &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); }
print_queue(kq->queue);
return true;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){ if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ && down_read_trylock(&kq->dev->adev->reset_domain->sem)) { 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); up_read(&kq->dev->adev->reset_domain->sem); }
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 * kq_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;}
int 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 /* Fatal err detected, packet submission won't go through */ if (amdgpu_amdkfd_is_fed(kq->dev->adev)) return -EIO;
/* Make sure ring buffer is updated before wptr updated */ mb();
if (kq->dev->kfd->device_info.doorbell_size == 8) { *kq->wptr64_kernel = kq->pending_wptr64; mb(); /* Make sure wptr updated before ring doorbell */ write_kernel_doorbell64(kq->queue->properties.doorbell_ptr, kq->pending_wptr64); } else { *kq->wptr_kernel = kq->pending_wptr; mb(); /* Make sure wptr updated before ring doorbell */ write_kernel_doorbell(kq->queue->properties.doorbell_ptr, kq->pending_wptr); }
return 0;}
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_obj(*kq); if (!kq) return NULL;
if (kq_initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE)) return kq;
dev_err(dev->adev->dev, "Failed to init kernel queue\n");
kfree(kq); return NULL;}
void kernel_queue_uninit(struct kernel_queue *kq){ kq_uninitialize(kq); kfree(kq);}