[deliverable/linux.git] / drivers / gpu / drm / amd / amdkfd / kfd_kernel_queue.c

/*
 * 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("amdkfd: 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->ops.get_mqd_manager(dev->dqm,
						KFD_MQD_TYPE_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) {
		pr_err("amdkfd: error init doorbell");
		goto err_get_kernel_doorbell;
	}

	retval = kfd_gtt_sa_allocate(dev, queue_size, &kq->pq);
	if (retval != 0) {
		pr_err("amdkfd: error 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;

	retval = kq->ops_asic_specific.initialize(kq, dev, type, queue_size);
	if (retval == false)
		goto err_eop_allocate_vidmem;

	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, sizeof(*kq->wptr_kernel),
					&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;
	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);

	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 = 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:
err_init_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;

}

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);
	else if (kq->queue->properties.type == KFD_QUEUE_TYPE_DIQ)
		kfd_gtt_sa_free(kq->dev, kq->fence_mem_obj);

	kq->mqd->uninit_mqd(kq->mqd, 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);
	kq->ops_asic_specific.uninitialize(kq);
	kfd_gtt_sa_free(kq->dev, 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("amdkfd: 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 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->ops.initialize = initialize;
	kq->ops.uninitialize = uninitialize;
	kq->ops.acquire_packet_buffer = acquire_packet_buffer;
	kq->ops.submit_packet = submit_packet;
	kq->ops.rollback_packet = rollback_packet;

	switch (dev->device_info->asic_family) {
	case CHIP_CARRIZO:
		kernel_queue_init_vi(&kq->ops_asic_specific);
		break;

	case CHIP_KAVERI:
		kernel_queue_init_cik(&kq->ops_asic_specific);
		break;
	}

	if (kq->ops.initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE) == false) {
		pr_err("amdkfd: failed to init kernel queue\n");
		kfree(kq);
		return NULL;
	}
	return kq;
}

void kernel_queue_uninit(struct kernel_queue *kq)
{
	BUG_ON(!kq);

	kq->ops.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_err("amdkfd: starting kernel queue test\n");

	kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ);
	BUG_ON(!kq);

	retval = kq->ops.acquire_packet_buffer(kq, 5, &buffer);
	BUG_ON(retval != 0);
	for (i = 0; i < 5; i++)
		buffer[i] = kq->nop_packet;
	kq->ops.submit_packet(kq);

	pr_err("amdkfd: ending kernel queue test\n");
}
Commit	Line	Data
ed6e6a34 BG	1	/*
	2	* Copyright 2014 Advanced Micro Devices, Inc.
	3	*
	4	* Permission is hereby granted, free of charge, to any person obtaining a
	5	* copy of this software and associated documentation files (the "Software"),
	6	* to deal in the Software without restriction, including without limitation
	7	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	8	* and/or sell copies of the Software, and to permit persons to whom the
	9	* Software is furnished to do so, subject to the following conditions:
	10	*
	11	* The above copyright notice and this permission notice shall be included in
	12	* all copies or substantial portions of the Software.
	13	*
	14	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	15	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	17	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	18	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	19	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	20	* OTHER DEALINGS IN THE SOFTWARE.
	21	*
	22	*/
	23
	24	#include <linux/types.h>
	25	#include <linux/mutex.h>
	26	#include <linux/slab.h>
	27	#include <linux/printk.h>
9a5634a7	28	#include <linux/sched.h>
ed6e6a34 BG	29	#include "kfd_kernel_queue.h"
	30	#include "kfd_priv.h"
	31	#include "kfd_device_queue_manager.h"
	32	#include "kfd_pm4_headers.h"
	33	#include "kfd_pm4_opcodes.h"
	34
	35	#define PM4_COUNT_ZERO (((1 << 15) - 1) << 16)
	36
	37	static bool initialize(struct kernel_queue kq, struct kfd_dev dev,
	38	enum kfd_queue_type type, unsigned int queue_size)
	39	{
	40	struct queue_properties prop;
	41	int retval;
	42	union PM4_MES_TYPE_3_HEADER nop;
	43
	44	BUG_ON(!kq \|\| !dev);
	45	BUG_ON(type != KFD_QUEUE_TYPE_DIQ && type != KFD_QUEUE_TYPE_HIQ);
	46
aaad2d8c	47	pr_debug("amdkfd: In func %s initializing queue type %d size %d\n",
ed6e6a34 BG	48	__func__, KFD_QUEUE_TYPE_HIQ, queue_size);
	49
	50	nop.opcode = IT_NOP;
	51	nop.type = PM4_TYPE_3;
	52	nop.u32all \|= PM4_COUNT_ZERO;
	53
	54	kq->dev = dev;
	55	kq->nop_packet = nop.u32all;
	56	switch (type) {
	57	case KFD_QUEUE_TYPE_DIQ:
	58	case KFD_QUEUE_TYPE_HIQ:
45c9a5e4	59	kq->mqd = dev->dqm->ops.get_mqd_manager(dev->dqm,
85d258f9	60	KFD_MQD_TYPE_HIQ);
ed6e6a34 BG	61	break;
	62	default:
	63	BUG();
	64	break;
	65	}
	66
	67	if (kq->mqd == NULL)
	68	return false;
	69
5cd78de5	70	prop.doorbell_ptr = kfd_get_kernel_doorbell(dev, &prop.doorbell_off);
ed6e6a34	71
aaad2d8c BG	72	if (prop.doorbell_ptr == NULL) {
aaad2d8c BG	73	pr_err("amdkfd: error init doorbell");
ed6e6a34	74	goto err_get_kernel_doorbell;
aaad2d8c	75	}
ed6e6a34	76
a86aa3ca	77	retval = kfd_gtt_sa_allocate(dev, queue_size, &kq->pq);
aaad2d8c BG	78	if (retval != 0) {
aaad2d8c BG	79	pr_err("amdkfd: error init pq queues size (%d)\n", queue_size);
ed6e6a34	80	goto err_pq_allocate_vidmem;
aaad2d8c	81	}
ed6e6a34 BG	82
	83	kq->pq_kernel_addr = kq->pq->cpu_ptr;
	84	kq->pq_gpu_addr = kq->pq->gpu_addr;
	85
6898f0a5 BG	86	retval = kq->ops_asic_specific.initialize(kq, dev, type, queue_size);
	87	if (retval == false)
	88	goto err_eop_allocate_vidmem;
	89
a86aa3ca OG	90	retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->rptr_kernel),
a86aa3ca OG	91	&kq->rptr_mem);
ed6e6a34 BG	92
	93	if (retval != 0)
	94	goto err_rptr_allocate_vidmem;
	95
	96	kq->rptr_kernel = kq->rptr_mem->cpu_ptr;
	97	kq->rptr_gpu_addr = kq->rptr_mem->gpu_addr;
	98
a86aa3ca OG	99	retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->wptr_kernel),
a86aa3ca OG	100	&kq->wptr_mem);
ed6e6a34 BG	101
	102	if (retval != 0)
	103	goto err_wptr_allocate_vidmem;
	104
	105	kq->wptr_kernel = kq->wptr_mem->cpu_ptr;
	106	kq->wptr_gpu_addr = kq->wptr_mem->gpu_addr;
	107
	108	memset(kq->pq_kernel_addr, 0, queue_size);
	109	memset(kq->rptr_kernel, 0, sizeof(*kq->rptr_kernel));
	110	memset(kq->wptr_kernel, 0, sizeof(*kq->wptr_kernel));
	111
	112	prop.queue_size = queue_size;
	113	prop.is_interop = false;
	114	prop.priority = 1;
	115	prop.queue_percent = 100;
	116	prop.type = type;
	117	prop.vmid = 0;
	118	prop.queue_address = kq->pq_gpu_addr;
	119	prop.read_ptr = (uint32_t *) kq->rptr_gpu_addr;
	120	prop.write_ptr = (uint32_t *) kq->wptr_gpu_addr;
6898f0a5 BG	121	prop.eop_ring_buffer_address = kq->eop_gpu_addr;
6898f0a5 BG	122	prop.eop_ring_buffer_size = PAGE_SIZE;
ed6e6a34 BG	123
	124	if (init_queue(&kq->queue, prop) != 0)
	125	goto err_init_queue;
	126
	127	kq->queue->device = dev;
	128	kq->queue->process = kfd_get_process(current);
	129
	130	retval = kq->mqd->init_mqd(kq->mqd, &kq->queue->mqd,
	131	&kq->queue->mqd_mem_obj,
	132	&kq->queue->gart_mqd_addr,
	133	&kq->queue->properties);
	134	if (retval != 0)
	135	goto err_init_mqd;
	136
	137	/* assign HIQ to HQD */
	138	if (type == KFD_QUEUE_TYPE_HIQ) {
	139	pr_debug("assigning hiq to hqd\n");
	140	kq->queue->pipe = KFD_CIK_HIQ_PIPE;
	141	kq->queue->queue = KFD_CIK_HIQ_QUEUE;
	142	kq->mqd->load_mqd(kq->mqd, kq->queue->mqd, kq->queue->pipe,
	143	kq->queue->queue, NULL);
	144	} else {
	145	/* allocate fence for DIQ */
	146
a86aa3ca OG	147	retval = kfd_gtt_sa_allocate(dev, sizeof(uint32_t),
a86aa3ca OG	148	&kq->fence_mem_obj);
ed6e6a34 BG	149
	150	if (retval != 0)
	151	goto err_alloc_fence;
	152
	153	kq->fence_kernel_address = kq->fence_mem_obj->cpu_ptr;
	154	kq->fence_gpu_addr = kq->fence_mem_obj->gpu_addr;
	155	}
	156
	157	print_queue(kq->queue);
	158
	159	return true;
	160	err_alloc_fence:
	161	err_init_mqd:
	162	uninit_queue(kq->queue);
	163	err_init_queue:
a86aa3ca	164	kfd_gtt_sa_free(dev, kq->wptr_mem);
ed6e6a34	165	err_wptr_allocate_vidmem:
a86aa3ca	166	kfd_gtt_sa_free(dev, kq->rptr_mem);
ed6e6a34	167	err_rptr_allocate_vidmem:
6898f0a5 BG	168	kfd_gtt_sa_free(dev, kq->eop_mem);
6898f0a5 BG	169	err_eop_allocate_vidmem:
a86aa3ca	170	kfd_gtt_sa_free(dev, kq->pq);
ed6e6a34	171	err_pq_allocate_vidmem:
5cd78de5	172	kfd_release_kernel_doorbell(dev, prop.doorbell_ptr);
ed6e6a34	173	err_get_kernel_doorbell:
ed6e6a34 BG	174	return false;
	175
	176	}
	177
	178	static void uninitialize(struct kernel_queue *kq)
	179	{
	180	BUG_ON(!kq);
	181
	182	if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ)
	183	kq->mqd->destroy_mqd(kq->mqd,
	184	NULL,
	185	false,
	186	QUEUE_PREEMPT_DEFAULT_TIMEOUT_MS,
	187	kq->queue->pipe,
	188	kq->queue->queue);
a86aa3ca OG	189	else if (kq->queue->properties.type == KFD_QUEUE_TYPE_DIQ)
a86aa3ca OG	190	kfd_gtt_sa_free(kq->dev, kq->fence_mem_obj);
ed6e6a34	191
aaad2d8c BG	192	kq->mqd->uninit_mqd(kq->mqd, kq->queue->mqd, kq->queue->mqd_mem_obj);
aaad2d8c BG	193
a86aa3ca OG	194	kfd_gtt_sa_free(kq->dev, kq->rptr_mem);
a86aa3ca OG	195	kfd_gtt_sa_free(kq->dev, kq->wptr_mem);
6898f0a5	196	kq->ops_asic_specific.uninitialize(kq);
a86aa3ca	197	kfd_gtt_sa_free(kq->dev, kq->pq);
ed6e6a34	198	kfd_release_kernel_doorbell(kq->dev,
5cd78de5	199	kq->queue->properties.doorbell_ptr);
ed6e6a34 BG	200	uninit_queue(kq->queue);
	201	}
	202
	203	static int acquire_packet_buffer(struct kernel_queue *kq,
	204	size_t packet_size_in_dwords, unsigned int **buffer_ptr)
	205	{
	206	size_t available_size;
	207	size_t queue_size_dwords;
	208	uint32_t wptr, rptr;
	209	unsigned int *queue_address;
	210
	211	BUG_ON(!kq \|\| !buffer_ptr);
	212
	213	rptr = *kq->rptr_kernel;
	214	wptr = *kq->wptr_kernel;
	215	queue_address = (unsigned int *)kq->pq_kernel_addr;
	216	queue_size_dwords = kq->queue->properties.queue_size / sizeof(uint32_t);
	217
aaad2d8c	218	pr_debug("amdkfd: In func %s\nrptr: %d\nwptr: %d\nqueue_address 0x%p\n",
ed6e6a34 BG	219	__func__, rptr, wptr, queue_address);
	220
	221	available_size = (rptr - 1 - wptr + queue_size_dwords) %
	222	queue_size_dwords;
	223
	224	if (packet_size_in_dwords >= queue_size_dwords \|\|
a550bb3d OG	225	packet_size_in_dwords >= available_size) {
	226	/*
	227	* make sure calling functions know
	228	* acquire_packet_buffer() failed
	229	*/
	230	*buffer_ptr = NULL;
ed6e6a34	231	return -ENOMEM;
a550bb3d	232	}
ed6e6a34 BG	233
	234	if (wptr + packet_size_in_dwords >= queue_size_dwords) {
	235	while (wptr > 0) {
	236	queue_address[wptr] = kq->nop_packet;
	237	wptr = (wptr + 1) % queue_size_dwords;
	238	}
	239	}
	240
	241	*buffer_ptr = &queue_address[wptr];
	242	kq->pending_wptr = wptr + packet_size_in_dwords;
	243
	244	return 0;
	245	}
	246
	247	static void submit_packet(struct kernel_queue *kq)
	248	{
	249	#ifdef DEBUG
	250	int i;
	251	#endif
	252
	253	BUG_ON(!kq);
	254
	255	#ifdef DEBUG
	256	for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) {
	257	pr_debug("0x%2X ", kq->pq_kernel_addr[i]);
	258	if (i % 15 == 0)
	259	pr_debug("\n");
	260	}
	261	pr_debug("\n");
	262	#endif
	263
	264	*kq->wptr_kernel = kq->pending_wptr;
5cd78de5	265	write_kernel_doorbell(kq->queue->properties.doorbell_ptr,
ed6e6a34 BG	266	kq->pending_wptr);
	267	}
	268
ed6e6a34 BG	269	static void rollback_packet(struct kernel_queue *kq)
	270	{
	271	BUG_ON(!kq);
	272	kq->pending_wptr = *kq->queue->properties.write_ptr;
	273	}
	274
	275	struct kernel_queue kernel_queue_init(struct kfd_dev dev,
	276	enum kfd_queue_type type)
	277	{
	278	struct kernel_queue *kq;
	279
	280	BUG_ON(!dev);
	281
	282	kq = kzalloc(sizeof(struct kernel_queue), GFP_KERNEL);
	283	if (!kq)
	284	return NULL;
	285
443fbd5f OG	286	kq->ops.initialize = initialize;
	287	kq->ops.uninitialize = uninitialize;
	288	kq->ops.acquire_packet_buffer = acquire_packet_buffer;
	289	kq->ops.submit_packet = submit_packet;
443fbd5f OG	290	kq->ops.rollback_packet = rollback_packet;
443fbd5f OG	291
6898f0a5 BG	292	switch (dev->device_info->asic_family) {
	293	case CHIP_CARRIZO:
	294	kernel_queue_init_vi(&kq->ops_asic_specific);
300dec95 OG	295	break;
300dec95 OG	296
6898f0a5 BG	297	case CHIP_KAVERI:
6898f0a5 BG	298	kernel_queue_init_cik(&kq->ops_asic_specific);
300dec95	299	break;
6898f0a5 BG	300	}
6898f0a5 BG	301
443fbd5f	302	if (kq->ops.initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE) == false) {
aaad2d8c	303	pr_err("amdkfd: failed to init kernel queue\n");
ed6e6a34 BG	304	kfree(kq);
	305	return NULL;
	306	}
	307	return kq;
	308	}
	309
	310	void kernel_queue_uninit(struct kernel_queue *kq)
	311	{
	312	BUG_ON(!kq);
	313
443fbd5f	314	kq->ops.uninitialize(kq);
ed6e6a34 BG	315	kfree(kq);
	316	}
	317
5ef360ea	318	static __attribute__((unused)) void test_kq(struct kfd_dev *dev)
ed6e6a34 BG	319	{
	320	struct kernel_queue *kq;
	321	uint32_t *buffer, i;
	322	int retval;
	323
	324	BUG_ON(!dev);
	325
aaad2d8c	326	pr_err("amdkfd: starting kernel queue test\n");
ed6e6a34 BG	327
	328	kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ);
	329	BUG_ON(!kq);
	330
443fbd5f	331	retval = kq->ops.acquire_packet_buffer(kq, 5, &buffer);
ed6e6a34 BG	332	BUG_ON(retval != 0);
	333	for (i = 0; i < 5; i++)
	334	buffer[i] = kq->nop_packet;
443fbd5f	335	kq->ops.submit_packet(kq);
ed6e6a34	336
aaad2d8c	337	pr_err("amdkfd: ending kernel queue test\n");
ed6e6a34 BG	338	}
	339
	340