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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
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
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
229
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)) {
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
