2 * Copyright 2014 Advanced Micro Devices, Inc.
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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.
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"
31 #include "kfd_device_queue_manager.h"
32 #include "kfd_pm4_headers.h"
33 #include "kfd_pm4_opcodes.h"
35 #define PM4_COUNT_ZERO (((1 << 15) - 1) << 16)
37 static bool initialize(struct kernel_queue *kq, struct kfd_dev *dev,
38 enum kfd_queue_type type, unsigned int queue_size)
40 struct queue_properties prop;
42 union PM4_MES_TYPE_3_HEADER nop;
45 BUG_ON(type != KFD_QUEUE_TYPE_DIQ && type != KFD_QUEUE_TYPE_HIQ);
47 pr_debug("kfd: In func %s initializing queue type %d size %d\n",
48 __func__, KFD_QUEUE_TYPE_HIQ, queue_size);
51 nop.type = PM4_TYPE_3;
52 nop.u32all |= PM4_COUNT_ZERO;
55 kq->nop_packet = nop.u32all;
57 case KFD_QUEUE_TYPE_DIQ:
58 case KFD_QUEUE_TYPE_HIQ:
59 kq->mqd = dev->dqm->get_mqd_manager(dev->dqm,
60 KFD_MQD_TYPE_CIK_HIQ);
70 prop.doorbell_ptr = kfd_get_kernel_doorbell(dev, &prop.doorbell_off);
72 if (prop.doorbell_ptr == NULL)
73 goto err_get_kernel_doorbell;
75 retval = kfd2kgd->allocate_mem(dev->kgd,
78 KFD_MEMPOOL_SYSTEM_WRITECOMBINE,
79 (struct kgd_mem **) &kq->pq);
82 goto err_pq_allocate_vidmem;
84 kq->pq_kernel_addr = kq->pq->cpu_ptr;
85 kq->pq_gpu_addr = kq->pq->gpu_addr;
87 retval = kfd2kgd->allocate_mem(dev->kgd,
88 sizeof(*kq->rptr_kernel),
90 KFD_MEMPOOL_SYSTEM_WRITECOMBINE,
91 (struct kgd_mem **) &kq->rptr_mem);
94 goto err_rptr_allocate_vidmem;
96 kq->rptr_kernel = kq->rptr_mem->cpu_ptr;
97 kq->rptr_gpu_addr = kq->rptr_mem->gpu_addr;
99 retval = kfd2kgd->allocate_mem(dev->kgd,
100 sizeof(*kq->wptr_kernel),
102 KFD_MEMPOOL_SYSTEM_WRITECOMBINE,
103 (struct kgd_mem **) &kq->wptr_mem);
106 goto err_wptr_allocate_vidmem;
108 kq->wptr_kernel = kq->wptr_mem->cpu_ptr;
109 kq->wptr_gpu_addr = kq->wptr_mem->gpu_addr;
111 memset(kq->pq_kernel_addr, 0, queue_size);
112 memset(kq->rptr_kernel, 0, sizeof(*kq->rptr_kernel));
113 memset(kq->wptr_kernel, 0, sizeof(*kq->wptr_kernel));
115 prop.queue_size = queue_size;
116 prop.is_interop = false;
118 prop.queue_percent = 100;
121 prop.queue_address = kq->pq_gpu_addr;
122 prop.read_ptr = (uint32_t *) kq->rptr_gpu_addr;
123 prop.write_ptr = (uint32_t *) kq->wptr_gpu_addr;
125 if (init_queue(&kq->queue, prop) != 0)
128 kq->queue->device = dev;
129 kq->queue->process = kfd_get_process(current);
131 retval = kq->mqd->init_mqd(kq->mqd, &kq->queue->mqd,
132 &kq->queue->mqd_mem_obj,
133 &kq->queue->gart_mqd_addr,
134 &kq->queue->properties);
138 /* assign HIQ to HQD */
139 if (type == KFD_QUEUE_TYPE_HIQ) {
140 pr_debug("assigning hiq to hqd\n");
141 kq->queue->pipe = KFD_CIK_HIQ_PIPE;
142 kq->queue->queue = KFD_CIK_HIQ_QUEUE;
143 kq->mqd->load_mqd(kq->mqd, kq->queue->mqd, kq->queue->pipe,
144 kq->queue->queue, NULL);
146 /* allocate fence for DIQ */
148 retval = kfd2kgd->allocate_mem(dev->kgd,
151 KFD_MEMPOOL_SYSTEM_WRITECOMBINE,
152 (struct kgd_mem **) &kq->fence_mem_obj);
155 goto err_alloc_fence;
157 kq->fence_kernel_address = kq->fence_mem_obj->cpu_ptr;
158 kq->fence_gpu_addr = kq->fence_mem_obj->gpu_addr;
161 print_queue(kq->queue);
166 uninit_queue(kq->queue);
168 kfd2kgd->free_mem(dev->kgd, (struct kgd_mem *) kq->wptr_mem);
169 err_wptr_allocate_vidmem:
170 kfd2kgd->free_mem(dev->kgd, (struct kgd_mem *) kq->rptr_mem);
171 err_rptr_allocate_vidmem:
172 kfd2kgd->free_mem(dev->kgd, (struct kgd_mem *) kq->pq);
173 err_pq_allocate_vidmem:
174 pr_err("kfd: error init pq\n");
175 kfd_release_kernel_doorbell(dev, prop.doorbell_ptr);
176 err_get_kernel_doorbell:
177 pr_err("kfd: error init doorbell");
182 static void uninitialize(struct kernel_queue *kq)
186 if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ)
187 kq->mqd->destroy_mqd(kq->mqd,
190 QUEUE_PREEMPT_DEFAULT_TIMEOUT_MS,
194 kfd2kgd->free_mem(kq->dev->kgd, (struct kgd_mem *) kq->rptr_mem);
195 kfd2kgd->free_mem(kq->dev->kgd, (struct kgd_mem *) kq->wptr_mem);
196 kfd2kgd->free_mem(kq->dev->kgd, (struct kgd_mem *) kq->pq);
197 kfd_release_kernel_doorbell(kq->dev,
198 kq->queue->properties.doorbell_ptr);
199 uninit_queue(kq->queue);
202 static int acquire_packet_buffer(struct kernel_queue *kq,
203 size_t packet_size_in_dwords, unsigned int **buffer_ptr)
205 size_t available_size;
206 size_t queue_size_dwords;
208 unsigned int *queue_address;
210 BUG_ON(!kq || !buffer_ptr);
212 rptr = *kq->rptr_kernel;
213 wptr = *kq->wptr_kernel;
214 queue_address = (unsigned int *)kq->pq_kernel_addr;
215 queue_size_dwords = kq->queue->properties.queue_size / sizeof(uint32_t);
217 pr_debug("kfd: In func %s\nrptr: %d\nwptr: %d\nqueue_address 0x%p\n",
218 __func__, rptr, wptr, queue_address);
220 available_size = (rptr - 1 - wptr + queue_size_dwords) %
223 if (packet_size_in_dwords >= queue_size_dwords ||
224 packet_size_in_dwords >= available_size)
227 if (wptr + packet_size_in_dwords >= queue_size_dwords) {
229 queue_address[wptr] = kq->nop_packet;
230 wptr = (wptr + 1) % queue_size_dwords;
234 *buffer_ptr = &queue_address[wptr];
235 kq->pending_wptr = wptr + packet_size_in_dwords;
240 static void submit_packet(struct kernel_queue *kq)
249 for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) {
250 pr_debug("0x%2X ", kq->pq_kernel_addr[i]);
257 *kq->wptr_kernel = kq->pending_wptr;
258 write_kernel_doorbell(kq->queue->properties.doorbell_ptr,
262 static int sync_with_hw(struct kernel_queue *kq, unsigned long timeout_ms)
264 unsigned long org_timeout_ms;
268 org_timeout_ms = timeout_ms;
269 timeout_ms += jiffies * 1000 / HZ;
270 while (*kq->wptr_kernel != *kq->rptr_kernel) {
271 if (time_after(jiffies * 1000 / HZ, timeout_ms)) {
272 pr_err("kfd: kernel_queue %s timeout expired %lu\n",
273 __func__, org_timeout_ms);
274 pr_err("kfd: wptr: %d rptr: %d\n",
275 *kq->wptr_kernel, *kq->rptr_kernel);
284 static void rollback_packet(struct kernel_queue *kq)
287 kq->pending_wptr = *kq->queue->properties.write_ptr;
290 struct kernel_queue *kernel_queue_init(struct kfd_dev *dev,
291 enum kfd_queue_type type)
293 struct kernel_queue *kq;
297 kq = kzalloc(sizeof(struct kernel_queue), GFP_KERNEL);
301 kq->initialize = initialize;
302 kq->uninitialize = uninitialize;
303 kq->acquire_packet_buffer = acquire_packet_buffer;
304 kq->submit_packet = submit_packet;
305 kq->sync_with_hw = sync_with_hw;
306 kq->rollback_packet = rollback_packet;
308 if (kq->initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE) == false) {
309 pr_err("kfd: failed to init kernel queue\n");
316 void kernel_queue_uninit(struct kernel_queue *kq)
320 kq->uninitialize(kq);
324 static __attribute__((unused)) void test_kq(struct kfd_dev *dev)
326 struct kernel_queue *kq;
332 pr_debug("kfd: starting kernel queue test\n");
334 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ);
337 retval = kq->acquire_packet_buffer(kq, 5, &buffer);
339 for (i = 0; i < 5; i++)
340 buffer[i] = kq->nop_packet;
341 kq->submit_packet(kq);
342 kq->sync_with_hw(kq, 1000);
344 pr_debug("kfd: ending kernel queue test\n");