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>
28#include <linux/sched.h>
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
37static 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("amdkfd: 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:
59		kq->mqd = dev->dqm->ops.get_mqd_manager(dev->dqm,
60						KFD_MQD_TYPE_HIQ);
61		break;
62	default:
63		BUG();
64		break;
65	}
66
67	if (kq->mqd == NULL)
68		return false;
69
70	prop.doorbell_ptr = kfd_get_kernel_doorbell(dev, &prop.doorbell_off);
71
72	if (prop.doorbell_ptr == NULL) {
73		pr_err("amdkfd: error init doorbell");
74		goto err_get_kernel_doorbell;
75	}
76
77	retval = kfd_gtt_sa_allocate(dev, queue_size, &kq->pq);
78	if (retval != 0) {
79		pr_err("amdkfd: error init pq queues size (%d)\n", queue_size);
80		goto err_pq_allocate_vidmem;
81	}
82
83	kq->pq_kernel_addr = kq->pq->cpu_ptr;
84	kq->pq_gpu_addr = kq->pq->gpu_addr;
85
86	retval = kq->ops_asic_specific.initialize(kq, dev, type, queue_size);
87	if (retval == false)
88		goto err_eop_allocate_vidmem;
89
90	retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->rptr_kernel),
91					&kq->rptr_mem);
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
99	retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->wptr_kernel),
100					&kq->wptr_mem);
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;
121	prop.eop_ring_buffer_address = kq->eop_gpu_addr;
122	prop.eop_ring_buffer_size = PAGE_SIZE;
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
147		retval = kfd_gtt_sa_allocate(dev, sizeof(uint32_t),
148						&kq->fence_mem_obj);
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;
160err_alloc_fence:
161err_init_mqd:
162	uninit_queue(kq->queue);
163err_init_queue:
164	kfd_gtt_sa_free(dev, kq->wptr_mem);
165err_wptr_allocate_vidmem:
166	kfd_gtt_sa_free(dev, kq->rptr_mem);
167err_rptr_allocate_vidmem:
168	kfd_gtt_sa_free(dev, kq->eop_mem);
169err_eop_allocate_vidmem:
170	kfd_gtt_sa_free(dev, kq->pq);
171err_pq_allocate_vidmem:
172	kfd_release_kernel_doorbell(dev, prop.doorbell_ptr);
173err_get_kernel_doorbell:
174	return false;
175
176}
177
178static 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);
189	else if (kq->queue->properties.type == KFD_QUEUE_TYPE_DIQ)
190		kfd_gtt_sa_free(kq->dev, kq->fence_mem_obj);
191
192	kq->mqd->uninit_mqd(kq->mqd, kq->queue->mqd, kq->queue->mqd_mem_obj);
193
194	kfd_gtt_sa_free(kq->dev, kq->rptr_mem);
195	kfd_gtt_sa_free(kq->dev, kq->wptr_mem);
196	kq->ops_asic_specific.uninitialize(kq);
197	kfd_gtt_sa_free(kq->dev, kq->pq);
198	kfd_release_kernel_doorbell(kq->dev,
199					kq->queue->properties.doorbell_ptr);
200	uninit_queue(kq->queue);
201}
202
203static 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
218	pr_debug("rptr: %d\n", rptr);
219	pr_debug("wptr: %d\n", wptr);
220	pr_debug("queue_address 0x%p\n", queue_address);
221
222	available_size = (rptr - 1 - wptr + queue_size_dwords) %
223							queue_size_dwords;
224
225	if (packet_size_in_dwords >= queue_size_dwords ||
226			packet_size_in_dwords >= available_size) {
227		/*
228		 * make sure calling functions know
229		 * acquire_packet_buffer() failed
230		 */
231		*buffer_ptr = NULL;
232		return -ENOMEM;
233	}
234
235	if (wptr + packet_size_in_dwords >= queue_size_dwords) {
236		while (wptr > 0) {
237			queue_address[wptr] = kq->nop_packet;
238			wptr = (wptr + 1) % queue_size_dwords;
239		}
240	}
241
242	*buffer_ptr = &queue_address[wptr];
243	kq->pending_wptr = wptr + packet_size_in_dwords;
244
245	return 0;
246}
247
248static void submit_packet(struct kernel_queue *kq)
249{
250#ifdef DEBUG
251	int i;
252#endif
253
254	BUG_ON(!kq);
255
256#ifdef DEBUG
257	for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) {
258		pr_debug("0x%2X ", kq->pq_kernel_addr[i]);
259		if (i % 15 == 0)
260			pr_debug("\n");
261	}
262	pr_debug("\n");
263#endif
264
265	*kq->wptr_kernel = kq->pending_wptr;
266	write_kernel_doorbell(kq->queue->properties.doorbell_ptr,
267				kq->pending_wptr);
268}
269
270static void rollback_packet(struct kernel_queue *kq)
271{
272	BUG_ON(!kq);
273	kq->pending_wptr = *kq->queue->properties.write_ptr;
274}
275
276struct kernel_queue *kernel_queue_init(struct kfd_dev *dev,
277					enum kfd_queue_type type)
278{
279	struct kernel_queue *kq;
280
281	BUG_ON(!dev);
282
283	kq = kzalloc(sizeof(struct kernel_queue), GFP_KERNEL);
284	if (!kq)
285		return NULL;
286
287	kq->ops.initialize = initialize;
288	kq->ops.uninitialize = uninitialize;
289	kq->ops.acquire_packet_buffer = acquire_packet_buffer;
290	kq->ops.submit_packet = submit_packet;
291	kq->ops.rollback_packet = rollback_packet;
292
293	switch (dev->device_info->asic_family) {
294	case CHIP_CARRIZO:
295		kernel_queue_init_vi(&kq->ops_asic_specific);
296		break;
297
298	case CHIP_KAVERI:
299		kernel_queue_init_cik(&kq->ops_asic_specific);
300		break;
301	}
302
303	if (kq->ops.initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE) == false) {
304		pr_err("amdkfd: failed to init kernel queue\n");
305		kfree(kq);
306		return NULL;
307	}
308	return kq;
309}
310
311void kernel_queue_uninit(struct kernel_queue *kq)
312{
313	BUG_ON(!kq);
314
315	kq->ops.uninitialize(kq);
316	kfree(kq);
317}
318
319static __attribute__((unused)) void test_kq(struct kfd_dev *dev)
320{
321	struct kernel_queue *kq;
322	uint32_t *buffer, i;
323	int retval;
324
325	BUG_ON(!dev);
326
327	pr_err("amdkfd: starting kernel queue test\n");
328
329	kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ);
330	BUG_ON(!kq);
331
332	retval = kq->ops.acquire_packet_buffer(kq, 5, &buffer);
333	BUG_ON(retval != 0);
334	for (i = 0; i < 5; i++)
335		buffer[i] = kq->nop_packet;
336	kq->ops.submit_packet(kq);
337
338	pr_err("amdkfd: ending kernel queue test\n");
339}
340
341
342