[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("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->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)
		goto err_get_kernel_doorbell;

	retval = kfd_gtt_sa_allocate(dev, queue_size, &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 = 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;

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

	kfd_gtt_sa_free(kq->dev, kq->rptr_mem);
	kfd_gtt_sa_free(kq->dev, kq->wptr_mem);
	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("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->ops.initialize = initialize;
	kq->ops.uninitialize = uninitialize;
	kq->ops.acquire_packet_buffer = acquire_packet_buffer;
	kq->ops.submit_packet = submit_packet;
	kq->ops.sync_with_hw = sync_with_hw;
	kq->ops.rollback_packet = rollback_packet;

	if (kq->ops.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->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_debug("kfd: 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);
	kq->ops.sync_with_hw(kq, 1000);

	pr_debug("kfd: 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
	47	pr_debug("kfd: In func %s initializing queue type %d size %d\n",
	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 BG	71
	72	if (prop.doorbell_ptr == NULL)
	73	goto err_get_kernel_doorbell;
	74
a86aa3ca	75	retval = kfd_gtt_sa_allocate(dev, queue_size, &kq->pq);
ed6e6a34 BG	76
	77	if (retval != 0)
	78	goto err_pq_allocate_vidmem;
	79
	80	kq->pq_kernel_addr = kq->pq->cpu_ptr;
	81	kq->pq_gpu_addr = kq->pq->gpu_addr;
	82
a86aa3ca OG	83	retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->rptr_kernel),
a86aa3ca OG	84	&kq->rptr_mem);
ed6e6a34 BG	85
	86	if (retval != 0)
	87	goto err_rptr_allocate_vidmem;
	88
	89	kq->rptr_kernel = kq->rptr_mem->cpu_ptr;
	90	kq->rptr_gpu_addr = kq->rptr_mem->gpu_addr;
	91
a86aa3ca OG	92	retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->wptr_kernel),
a86aa3ca OG	93	&kq->wptr_mem);
ed6e6a34 BG	94
	95	if (retval != 0)
	96	goto err_wptr_allocate_vidmem;
	97
	98	kq->wptr_kernel = kq->wptr_mem->cpu_ptr;
	99	kq->wptr_gpu_addr = kq->wptr_mem->gpu_addr;
	100
	101	memset(kq->pq_kernel_addr, 0, queue_size);
	102	memset(kq->rptr_kernel, 0, sizeof(*kq->rptr_kernel));
	103	memset(kq->wptr_kernel, 0, sizeof(*kq->wptr_kernel));
	104
	105	prop.queue_size = queue_size;
	106	prop.is_interop = false;
	107	prop.priority = 1;
	108	prop.queue_percent = 100;
	109	prop.type = type;
	110	prop.vmid = 0;
	111	prop.queue_address = kq->pq_gpu_addr;
	112	prop.read_ptr = (uint32_t *) kq->rptr_gpu_addr;
	113	prop.write_ptr = (uint32_t *) kq->wptr_gpu_addr;
	114
	115	if (init_queue(&kq->queue, prop) != 0)
	116	goto err_init_queue;
	117
	118	kq->queue->device = dev;
	119	kq->queue->process = kfd_get_process(current);
	120
	121	retval = kq->mqd->init_mqd(kq->mqd, &kq->queue->mqd,
	122	&kq->queue->mqd_mem_obj,
	123	&kq->queue->gart_mqd_addr,
	124	&kq->queue->properties);
	125	if (retval != 0)
	126	goto err_init_mqd;
	127
	128	/* assign HIQ to HQD */
	129	if (type == KFD_QUEUE_TYPE_HIQ) {
	130	pr_debug("assigning hiq to hqd\n");
	131	kq->queue->pipe = KFD_CIK_HIQ_PIPE;
	132	kq->queue->queue = KFD_CIK_HIQ_QUEUE;
	133	kq->mqd->load_mqd(kq->mqd, kq->queue->mqd, kq->queue->pipe,
	134	kq->queue->queue, NULL);
	135	} else {
	136	/* allocate fence for DIQ */
	137
a86aa3ca OG	138	retval = kfd_gtt_sa_allocate(dev, sizeof(uint32_t),
a86aa3ca OG	139	&kq->fence_mem_obj);
ed6e6a34 BG	140
	141	if (retval != 0)
	142	goto err_alloc_fence;
	143
	144	kq->fence_kernel_address = kq->fence_mem_obj->cpu_ptr;
	145	kq->fence_gpu_addr = kq->fence_mem_obj->gpu_addr;
	146	}
	147
	148	print_queue(kq->queue);
	149
	150	return true;
	151	err_alloc_fence:
	152	err_init_mqd:
	153	uninit_queue(kq->queue);
	154	err_init_queue:
a86aa3ca	155	kfd_gtt_sa_free(dev, kq->wptr_mem);
ed6e6a34	156	err_wptr_allocate_vidmem:
a86aa3ca	157	kfd_gtt_sa_free(dev, kq->rptr_mem);
ed6e6a34	158	err_rptr_allocate_vidmem:
a86aa3ca	159	kfd_gtt_sa_free(dev, kq->pq);
ed6e6a34 BG	160	err_pq_allocate_vidmem:
ed6e6a34 BG	161	pr_err("kfd: error init pq\n");
5cd78de5	162	kfd_release_kernel_doorbell(dev, prop.doorbell_ptr);
ed6e6a34 BG	163	err_get_kernel_doorbell:
	164	pr_err("kfd: error init doorbell");
	165	return false;
	166
	167	}
	168
	169	static void uninitialize(struct kernel_queue *kq)
	170	{
	171	BUG_ON(!kq);
	172
	173	if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ)
	174	kq->mqd->destroy_mqd(kq->mqd,
	175	NULL,
	176	false,
	177	QUEUE_PREEMPT_DEFAULT_TIMEOUT_MS,
	178	kq->queue->pipe,
	179	kq->queue->queue);
a86aa3ca OG	180	else if (kq->queue->properties.type == KFD_QUEUE_TYPE_DIQ)
a86aa3ca OG	181	kfd_gtt_sa_free(kq->dev, kq->fence_mem_obj);
ed6e6a34	182
a86aa3ca OG	183	kfd_gtt_sa_free(kq->dev, kq->rptr_mem);
	184	kfd_gtt_sa_free(kq->dev, kq->wptr_mem);
	185	kfd_gtt_sa_free(kq->dev, kq->pq);
ed6e6a34	186	kfd_release_kernel_doorbell(kq->dev,
5cd78de5	187	kq->queue->properties.doorbell_ptr);
ed6e6a34 BG	188	uninit_queue(kq->queue);
	189	}
	190
	191	static int acquire_packet_buffer(struct kernel_queue *kq,
	192	size_t packet_size_in_dwords, unsigned int **buffer_ptr)
	193	{
	194	size_t available_size;
	195	size_t queue_size_dwords;
	196	uint32_t wptr, rptr;
	197	unsigned int *queue_address;
	198
	199	BUG_ON(!kq \|\| !buffer_ptr);
	200
	201	rptr = *kq->rptr_kernel;
	202	wptr = *kq->wptr_kernel;
	203	queue_address = (unsigned int *)kq->pq_kernel_addr;
	204	queue_size_dwords = kq->queue->properties.queue_size / sizeof(uint32_t);
	205
	206	pr_debug("kfd: In func %s\nrptr: %d\nwptr: %d\nqueue_address 0x%p\n",
	207	__func__, rptr, wptr, queue_address);
	208
	209	available_size = (rptr - 1 - wptr + queue_size_dwords) %
	210	queue_size_dwords;
	211
	212	if (packet_size_in_dwords >= queue_size_dwords \|\|
a550bb3d OG	213	packet_size_in_dwords >= available_size) {
	214	/*
	215	* make sure calling functions know
	216	* acquire_packet_buffer() failed
	217	*/
	218	*buffer_ptr = NULL;
ed6e6a34	219	return -ENOMEM;
a550bb3d	220	}
ed6e6a34 BG	221
	222	if (wptr + packet_size_in_dwords >= queue_size_dwords) {
	223	while (wptr > 0) {
	224	queue_address[wptr] = kq->nop_packet;
	225	wptr = (wptr + 1) % queue_size_dwords;
	226	}
	227	}
	228
	229	*buffer_ptr = &queue_address[wptr];
	230	kq->pending_wptr = wptr + packet_size_in_dwords;
	231
	232	return 0;
	233	}
	234
	235	static void submit_packet(struct kernel_queue *kq)
	236	{
	237	#ifdef DEBUG
	238	int i;
	239	#endif
	240
	241	BUG_ON(!kq);
	242
	243	#ifdef DEBUG
	244	for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) {
	245	pr_debug("0x%2X ", kq->pq_kernel_addr[i]);
	246	if (i % 15 == 0)
	247	pr_debug("\n");
	248	}
	249	pr_debug("\n");
	250	#endif
	251
	252	*kq->wptr_kernel = kq->pending_wptr;
5cd78de5	253	write_kernel_doorbell(kq->queue->properties.doorbell_ptr,
ed6e6a34 BG	254	kq->pending_wptr);
	255	}
	256
	257	static int sync_with_hw(struct kernel_queue *kq, unsigned long timeout_ms)
	258	{
	259	unsigned long org_timeout_ms;
	260
	261	BUG_ON(!kq);
	262
	263	org_timeout_ms = timeout_ms;
	264	timeout_ms += jiffies * 1000 / HZ;
	265	while (kq->wptr_kernel != kq->rptr_kernel) {
	266	if (time_after(jiffies * 1000 / HZ, timeout_ms)) {
	267	pr_err("kfd: kernel_queue %s timeout expired %lu\n",
	268	__func__, org_timeout_ms);
	269	pr_err("kfd: wptr: %d rptr: %d\n",
	270	kq->wptr_kernel, kq->rptr_kernel);
	271	return -ETIME;
	272	}
9a5634a7	273	schedule();
ed6e6a34 BG	274	}
	275
	276	return 0;
	277	}
	278
	279	static void rollback_packet(struct kernel_queue *kq)
	280	{
	281	BUG_ON(!kq);
	282	kq->pending_wptr = *kq->queue->properties.write_ptr;
	283	}
	284
	285	struct kernel_queue kernel_queue_init(struct kfd_dev dev,
	286	enum kfd_queue_type type)
	287	{
	288	struct kernel_queue *kq;
	289
	290	BUG_ON(!dev);
	291
	292	kq = kzalloc(sizeof(struct kernel_queue), GFP_KERNEL);
	293	if (!kq)
	294	return NULL;
	295
443fbd5f OG	296	kq->ops.initialize = initialize;
	297	kq->ops.uninitialize = uninitialize;
	298	kq->ops.acquire_packet_buffer = acquire_packet_buffer;
	299	kq->ops.submit_packet = submit_packet;
	300	kq->ops.sync_with_hw = sync_with_hw;
	301	kq->ops.rollback_packet = rollback_packet;
	302
	303	if (kq->ops.initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE) == false) {
ed6e6a34 BG	304	pr_err("kfd: failed to init kernel queue\n");
	305	kfree(kq);
	306	return NULL;
	307	}
	308	return kq;
	309	}
	310
	311	void kernel_queue_uninit(struct kernel_queue *kq)
	312	{
	313	BUG_ON(!kq);
	314
443fbd5f	315	kq->ops.uninitialize(kq);
ed6e6a34 BG	316	kfree(kq);
	317	}
	318
5ef360ea	319	static __attribute__((unused)) void test_kq(struct kfd_dev *dev)
ed6e6a34 BG	320	{
	321	struct kernel_queue *kq;
	322	uint32_t *buffer, i;
	323	int retval;
	324
	325	BUG_ON(!dev);
	326
	327	pr_debug("kfd: starting kernel queue test\n");
	328
	329	kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ);
	330	BUG_ON(!kq);
	331
443fbd5f	332	retval = kq->ops.acquire_packet_buffer(kq, 5, &buffer);
ed6e6a34 BG	333	BUG_ON(retval != 0);
	334	for (i = 0; i < 5; i++)
	335	buffer[i] = kq->nop_packet;
443fbd5f OG	336	kq->ops.submit_packet(kq);
443fbd5f OG	337	kq->ops.sync_with_hw(kq, 1000);
ed6e6a34 BG	338
	339	pr_debug("kfd: ending kernel queue test\n");
	340	}
	341
	342