/* * 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) static bool 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; 	BUG_ON(!kq || !dev);	BUG_ON(type != KFD_QUEUE_TYPE_DIQ && type != KFD_QUEUE_TYPE_HIQ); 	pr_debug("kfd: In func %s initializing queue type %d size %d\n",			__func__, KFD_QUEUE_TYPE_HIQ, queue_size); 	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:	case KFD_QUEUE_TYPE_HIQ:		kq->mqd = dev->dqm->get_mqd_manager(dev->dqm,						KFD_MQD_TYPE_CIK_HIQ);		break;	default:		BUG();		break;	} 	if (kq->mqd == NULL)		return false; 	prop.doorbell_ptr = kfd_get_kernel_doorbell(dev, &prop.doorbell_off); 	if (prop.doorbell_ptr == NULL)		goto err_get_kernel_doorbell; 	retval = kfd2kgd->allocate_mem(dev->kgd,					queue_size,					PAGE_SIZE,					KFD_MEMPOOL_SYSTEM_WRITECOMBINE,					(struct kgd_mem **) &kq->pq); 	if (retval != 0)		goto err_pq_allocate_vidmem; 	kq->pq_kernel_addr = kq->pq->cpu_ptr;	kq->pq_gpu_addr = kq->pq->gpu_addr; 	retval = kfd2kgd->allocate_mem(dev->kgd,					sizeof(*kq->rptr_kernel),					32,					KFD_MEMPOOL_SYSTEM_WRITECOMBINE,					(struct kgd_mem **) &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 = kfd2kgd->allocate_mem(dev->kgd,					sizeof(*kq->wptr_kernel),					32,					KFD_MEMPOOL_SYSTEM_WRITECOMBINE,					(struct kgd_mem **) &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.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; 	if (init_queue(&kq->queue, prop) != 0)		goto err_init_queue; 	kq->queue->device = dev;	kq->queue->process = kfd_get_process(current); 	retval = kq->mqd->init_mqd(kq->mqd, &kq->queue->mqd,					&kq->queue->mqd_mem_obj,					&kq->queue->gart_mqd_addr,					&kq->queue->properties);	if (retval != 0)		goto err_init_mqd; 	/* 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->load_mqd(kq->mqd, kq->queue->mqd, kq->queue->pipe,					kq->queue->queue, NULL);	} else {		/* allocate fence for DIQ */ 		retval = kfd2kgd->allocate_mem(dev->kgd,					sizeof(uint32_t),					32,					KFD_MEMPOOL_SYSTEM_WRITECOMBINE,					(struct kgd_mem **) &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:err_init_mqd:	uninit_queue(kq->queue);err_init_queue:	kfd2kgd->free_mem(dev->kgd, (struct kgd_mem *) kq->wptr_mem);err_wptr_allocate_vidmem:	kfd2kgd->free_mem(dev->kgd, (struct kgd_mem *) kq->rptr_mem);err_rptr_allocate_vidmem:	kfd2kgd->free_mem(dev->kgd, (struct kgd_mem *) kq->pq);err_pq_allocate_vidmem:	pr_err("kfd: error init pq\n");	kfd_release_kernel_doorbell(dev, prop.doorbell_ptr);err_get_kernel_doorbell:	pr_err("kfd: error init doorbell");	return false; } static void uninitialize(struct kernel_queue *kq){	BUG_ON(!kq); 	if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ)		kq->mqd->destroy_mqd(kq->mqd,					NULL,					false,					QUEUE_PREEMPT_DEFAULT_TIMEOUT_MS,					kq->queue->pipe,					kq->queue->queue); 	kfd2kgd->free_mem(kq->dev->kgd, (struct kgd_mem *) kq->rptr_mem);	kfd2kgd->free_mem(kq->dev->kgd, (struct kgd_mem *) kq->wptr_mem);	kfd2kgd->free_mem(kq->dev->kgd, (struct kgd_mem *) kq->pq);	kfd_release_kernel_doorbell(kq->dev,					kq->queue->properties.doorbell_ptr);	uninit_queue(kq->queue);} static int 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;	unsigned int *queue_address; 	BUG_ON(!kq || !buffer_ptr); 	rptr = *kq->rptr_kernel;	wptr = *kq->wptr_kernel;	queue_address = (unsigned int *)kq->pq_kernel_addr;	queue_size_dwords = kq->queue->properties.queue_size / sizeof(uint32_t); 	pr_debug("kfd: In func %s\nrptr: %d\nwptr: %d\nqueue_address 0x%p\n",			__func__, rptr, wptr, queue_address); 	available_size = (rptr - 1 - wptr + queue_size_dwords) %							queue_size_dwords; 	if (packet_size_in_dwords >= queue_size_dwords ||			packet_size_in_dwords >= available_size) {		/*		 * make sure calling functions know		 * acquire_packet_buffer() failed		 */		*buffer_ptr = NULL;		return -ENOMEM;	} 	if (wptr + packet_size_in_dwords >= queue_size_dwords) {		while (wptr > 0) {			queue_address[wptr] = kq->nop_packet;			wptr = (wptr + 1) % queue_size_dwords;		}	} 	*buffer_ptr = &queue_address[wptr];	kq->pending_wptr = wptr + packet_size_in_dwords; 	return 0;} static void submit_packet(struct kernel_queue *kq){#ifdef DEBUG	int i;#endif 	BUG_ON(!kq); #ifdef DEBUG	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 	*kq->wptr_kernel = kq->pending_wptr;	write_kernel_doorbell(kq->queue->properties.doorbell_ptr,				kq->pending_wptr);} static int sync_with_hw(struct kernel_queue *kq, unsigned long timeout_ms){	unsigned long org_timeout_ms; 	BUG_ON(!kq); 	org_timeout_ms = timeout_ms;	timeout_ms += jiffies * 1000 / HZ;	while (*kq->wptr_kernel != *kq->rptr_kernel) {		if (time_after(jiffies * 1000 / HZ, timeout_ms)) {			pr_err("kfd: kernel_queue %s timeout expired %lu\n",				__func__, org_timeout_ms);			pr_err("kfd: wptr: %d rptr: %d\n",				*kq->wptr_kernel, *kq->rptr_kernel);			return -ETIME;		}		schedule();	} 	return 0;} static void rollback_packet(struct kernel_queue *kq){	BUG_ON(!kq);	kq->pending_wptr = *kq->queue->properties.write_ptr;} struct kernel_queue *kernel_queue_init(struct kfd_dev *dev,					enum kfd_queue_type type){	struct kernel_queue *kq; 	BUG_ON(!dev); 	kq = kzalloc(sizeof(struct kernel_queue), GFP_KERNEL);	if (!kq)		return NULL; 	kq->initialize = initialize;	kq->uninitialize = uninitialize;	kq->acquire_packet_buffer = acquire_packet_buffer;	kq->submit_packet = submit_packet;	kq->sync_with_hw = sync_with_hw;	kq->rollback_packet = rollback_packet; 	if (kq->initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE) == false) {		pr_err("kfd: failed to init kernel queue\n");		kfree(kq);		return NULL;	}	return kq;} void kernel_queue_uninit(struct kernel_queue *kq){	BUG_ON(!kq); 	kq->uninitialize(kq);	kfree(kq);} static __attribute__((unused)) void test_kq(struct kfd_dev *dev){	struct kernel_queue *kq;	uint32_t *buffer, i;	int retval; 	BUG_ON(!dev); 	pr_debug("kfd: starting kernel queue test\n"); 	kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ);	BUG_ON(!kq); 	retval = kq->acquire_packet_buffer(kq, 5, &buffer);	BUG_ON(retval != 0);	for (i = 0; i < 5; i++)		buffer[i] = kq->nop_packet;	kq->submit_packet(kq);	kq->sync_with_hw(kq, 1000); 	pr_debug("kfd: ending kernel queue test\n");}