/* * Copyright 2014 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_dev *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, &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->device_info->asic_family > 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->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;	prop.cu_mask = NULL; 	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, 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,					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->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->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_dev *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_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");}