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("amdkfd: 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->ops.get_mqd_manager(dev->dqm,
70 prop.doorbell_ptr = kfd_get_kernel_doorbell(dev, &prop.doorbell_off);
72 if (prop.doorbell_ptr == NULL) {
73 pr_err("amdkfd: error init doorbell");
74 goto err_get_kernel_doorbell;
77 retval = kfd_gtt_sa_allocate(dev, queue_size, &kq->pq);
79 pr_err("amdkfd: error init pq queues size (%d)\n", queue_size);
80 goto err_pq_allocate_vidmem;
83 kq->pq_kernel_addr = kq->pq->cpu_ptr;
84 kq->pq_gpu_addr = kq->pq->gpu_addr;
86 retval = kq->ops_asic_specific.initialize(kq, dev, type, queue_size);
88 goto err_eop_allocate_vidmem;
90 retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->rptr_kernel),
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 = kfd_gtt_sa_allocate(dev, sizeof(*kq->wptr_kernel),
103 goto err_wptr_allocate_vidmem;
105 kq->wptr_kernel = kq->wptr_mem->cpu_ptr;
106 kq->wptr_gpu_addr = kq->wptr_mem->gpu_addr;
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));
112 prop.queue_size = queue_size;
113 prop.is_interop = false;
115 prop.queue_percent = 100;
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;
124 if (init_queue(&kq->queue, prop) != 0)
127 kq->queue->device = dev;
128 kq->queue->process = kfd_get_process(current);
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);
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);
145 /* allocate fence for DIQ */
147 retval = kfd_gtt_sa_allocate(dev, sizeof(uint32_t),
151 goto err_alloc_fence;
153 kq->fence_kernel_address = kq->fence_mem_obj->cpu_ptr;
154 kq->fence_gpu_addr = kq->fence_mem_obj->gpu_addr;
157 print_queue(kq->queue);
162 uninit_queue(kq->queue);
164 kfd_gtt_sa_free(dev, kq->wptr_mem);
165 err_wptr_allocate_vidmem:
166 kfd_gtt_sa_free(dev, kq->rptr_mem);
167 err_rptr_allocate_vidmem:
168 kfd_gtt_sa_free(dev, kq->eop_mem);
169 err_eop_allocate_vidmem:
170 kfd_gtt_sa_free(dev, kq->pq);
171 err_pq_allocate_vidmem:
172 kfd_release_kernel_doorbell(dev, prop.doorbell_ptr);
173 err_get_kernel_doorbell:
178 static void uninitialize(struct kernel_queue *kq)
182 if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ)
183 kq->mqd->destroy_mqd(kq->mqd,
186 QUEUE_PREEMPT_DEFAULT_TIMEOUT_MS,
189 else if (kq->queue->properties.type == KFD_QUEUE_TYPE_DIQ)
190 kfd_gtt_sa_free(kq->dev, kq->fence_mem_obj);
192 kq->mqd->uninit_mqd(kq->mqd, kq->queue->mqd, kq->queue->mqd_mem_obj);
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);
203 static int acquire_packet_buffer(struct kernel_queue *kq,
204 size_t packet_size_in_dwords, unsigned int **buffer_ptr)
206 size_t available_size;
207 size_t queue_size_dwords;
209 unsigned int *queue_address;
211 BUG_ON(!kq || !buffer_ptr);
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);
218 pr_debug("rptr: %d\n", rptr);
219 pr_debug("wptr: %d\n", wptr);
220 pr_debug("queue_address 0x%p\n", queue_address);
222 available_size = (rptr - 1 - wptr + queue_size_dwords) %
225 if (packet_size_in_dwords >= queue_size_dwords ||
226 packet_size_in_dwords >= available_size) {
228 * make sure calling functions know
229 * acquire_packet_buffer() failed
235 if (wptr + packet_size_in_dwords >= queue_size_dwords) {
237 queue_address[wptr] = kq->nop_packet;
238 wptr = (wptr + 1) % queue_size_dwords;
242 *buffer_ptr = &queue_address[wptr];
243 kq->pending_wptr = wptr + packet_size_in_dwords;
248 static void submit_packet(struct kernel_queue *kq)
257 for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) {
258 pr_debug("0x%2X ", kq->pq_kernel_addr[i]);
265 *kq->wptr_kernel = kq->pending_wptr;
266 write_kernel_doorbell(kq->queue->properties.doorbell_ptr,
270 static void rollback_packet(struct kernel_queue *kq)
273 kq->pending_wptr = *kq->queue->properties.write_ptr;
276 struct kernel_queue *kernel_queue_init(struct kfd_dev *dev,
277 enum kfd_queue_type type)
279 struct kernel_queue *kq;
283 kq = kzalloc(sizeof(struct kernel_queue), GFP_KERNEL);
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;
293 switch (dev->device_info->asic_family) {
295 kernel_queue_init_vi(&kq->ops_asic_specific);
299 kernel_queue_init_cik(&kq->ops_asic_specific);
303 if (kq->ops.initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE) == false) {
304 pr_err("amdkfd: failed to init kernel queue\n");
311 void kernel_queue_uninit(struct kernel_queue *kq)
315 kq->ops.uninitialize(kq);
319 static __attribute__((unused)) void test_kq(struct kfd_dev *dev)
321 struct kernel_queue *kq;
327 pr_err("amdkfd: starting kernel queue test\n");
329 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ);
332 retval = kq->ops.acquire_packet_buffer(kq, 5, &buffer);
334 for (i = 0; i < 5; i++)
335 buffer[i] = kq->nop_packet;
336 kq->ops.submit_packet(kq);
338 pr_err("amdkfd: ending kernel queue test\n");