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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 memset(&prop, 0, sizeof(prop));
51 memset(&nop, 0, sizeof(nop));
52
53 nop.opcode = IT_NOP;
54 nop.type = PM4_TYPE_3;
55 nop.u32all |= PM4_COUNT_ZERO;
56
57 kq->dev = dev;
58 kq->nop_packet = nop.u32all;
59 switch (type) {
60 case KFD_QUEUE_TYPE_DIQ:
61 case KFD_QUEUE_TYPE_HIQ:
62 kq->mqd = dev->dqm->ops.get_mqd_manager(dev->dqm,
63 KFD_MQD_TYPE_HIQ);
64 break;
65 default:
66 BUG();
67 break;
68 }
69
70 if (kq->mqd == NULL)
71 return false;
72
73 prop.doorbell_ptr = kfd_get_kernel_doorbell(dev, &prop.doorbell_off);
74
75 if (prop.doorbell_ptr == NULL) {
76 pr_err("amdkfd: error init doorbell");
77 goto err_get_kernel_doorbell;
78 }
79
80 retval = kfd_gtt_sa_allocate(dev, queue_size, &kq->pq);
81 if (retval != 0) {
82 pr_err("amdkfd: error init pq queues size (%d)\n", queue_size);
83 goto err_pq_allocate_vidmem;
84 }
85
86 kq->pq_kernel_addr = kq->pq->cpu_ptr;
87 kq->pq_gpu_addr = kq->pq->gpu_addr;
88
89 retval = kq->ops_asic_specific.initialize(kq, dev, type, queue_size);
90 if (retval == false)
91 goto err_eop_allocate_vidmem;
92
93 retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->rptr_kernel),
94 &kq->rptr_mem);
95
96 if (retval != 0)
97 goto err_rptr_allocate_vidmem;
98
99 kq->rptr_kernel = kq->rptr_mem->cpu_ptr;
100 kq->rptr_gpu_addr = kq->rptr_mem->gpu_addr;
101
102 retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->wptr_kernel),
103 &kq->wptr_mem);
104
105 if (retval != 0)
106 goto err_wptr_allocate_vidmem;
107
108 kq->wptr_kernel = kq->wptr_mem->cpu_ptr;
109 kq->wptr_gpu_addr = kq->wptr_mem->gpu_addr;
110
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));
114
115 prop.queue_size = queue_size;
116 prop.is_interop = false;
117 prop.priority = 1;
118 prop.queue_percent = 100;
119 prop.type = type;
120 prop.vmid = 0;
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;
124 prop.eop_ring_buffer_address = kq->eop_gpu_addr;
125 prop.eop_ring_buffer_size = PAGE_SIZE;
126
127 if (init_queue(&kq->queue, &prop) != 0)
128 goto err_init_queue;
129
130 kq->queue->device = dev;
131 kq->queue->process = kfd_get_process(current);
132
133 retval = kq->mqd->init_mqd(kq->mqd, &kq->queue->mqd,
134 &kq->queue->mqd_mem_obj,
135 &kq->queue->gart_mqd_addr,
136 &kq->queue->properties);
137 if (retval != 0)
138 goto err_init_mqd;
139
140
141 if (type == KFD_QUEUE_TYPE_HIQ) {
142 pr_debug("assigning hiq to hqd\n");
143 kq->queue->pipe = KFD_CIK_HIQ_PIPE;
144 kq->queue->queue = KFD_CIK_HIQ_QUEUE;
145 kq->mqd->load_mqd(kq->mqd, kq->queue->mqd, kq->queue->pipe,
146 kq->queue->queue, NULL);
147 } else {
148
149
150 retval = kfd_gtt_sa_allocate(dev, sizeof(uint32_t),
151 &kq->fence_mem_obj);
152
153 if (retval != 0)
154 goto err_alloc_fence;
155
156 kq->fence_kernel_address = kq->fence_mem_obj->cpu_ptr;
157 kq->fence_gpu_addr = kq->fence_mem_obj->gpu_addr;
158 }
159
160 print_queue(kq->queue);
161
162 return true;
163err_alloc_fence:
164err_init_mqd:
165 uninit_queue(kq->queue);
166err_init_queue:
167 kfd_gtt_sa_free(dev, kq->wptr_mem);
168err_wptr_allocate_vidmem:
169 kfd_gtt_sa_free(dev, kq->rptr_mem);
170err_rptr_allocate_vidmem:
171 kfd_gtt_sa_free(dev, kq->eop_mem);
172err_eop_allocate_vidmem:
173 kfd_gtt_sa_free(dev, kq->pq);
174err_pq_allocate_vidmem:
175 kfd_release_kernel_doorbell(dev, prop.doorbell_ptr);
176err_get_kernel_doorbell:
177 return false;
178
179}
180
181static void uninitialize(struct kernel_queue *kq)
182{
183 BUG_ON(!kq);
184
185 if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ)
186 kq->mqd->destroy_mqd(kq->mqd,
187 NULL,
188 false,
189 QUEUE_PREEMPT_DEFAULT_TIMEOUT_MS,
190 kq->queue->pipe,
191 kq->queue->queue);
192 else if (kq->queue->properties.type == KFD_QUEUE_TYPE_DIQ)
193 kfd_gtt_sa_free(kq->dev, kq->fence_mem_obj);
194
195 kq->mqd->uninit_mqd(kq->mqd, kq->queue->mqd, kq->queue->mqd_mem_obj);
196
197 kfd_gtt_sa_free(kq->dev, kq->rptr_mem);
198 kfd_gtt_sa_free(kq->dev, kq->wptr_mem);
199 kq->ops_asic_specific.uninitialize(kq);
200 kfd_gtt_sa_free(kq->dev, kq->pq);
201 kfd_release_kernel_doorbell(kq->dev,
202 kq->queue->properties.doorbell_ptr);
203 uninit_queue(kq->queue);
204}
205
206static int acquire_packet_buffer(struct kernel_queue *kq,
207 size_t packet_size_in_dwords, unsigned int **buffer_ptr)
208{
209 size_t available_size;
210 size_t queue_size_dwords;
211 uint32_t wptr, rptr;
212 unsigned int *queue_address;
213
214 BUG_ON(!kq || !buffer_ptr);
215
216 rptr = *kq->rptr_kernel;
217 wptr = *kq->wptr_kernel;
218 queue_address = (unsigned int *)kq->pq_kernel_addr;
219 queue_size_dwords = kq->queue->properties.queue_size / sizeof(uint32_t);
220
221 pr_debug("rptr: %d\n", rptr);
222 pr_debug("wptr: %d\n", wptr);
223 pr_debug("queue_address 0x%p\n", queue_address);
224
225 available_size = (rptr - 1 - wptr + queue_size_dwords) %
226 queue_size_dwords;
227
228 if (packet_size_in_dwords >= queue_size_dwords ||
229 packet_size_in_dwords >= available_size) {
230
231
232
233
234 *buffer_ptr = NULL;
235 return -ENOMEM;
236 }
237
238 if (wptr + packet_size_in_dwords >= queue_size_dwords) {
239 while (wptr > 0) {
240 queue_address[wptr] = kq->nop_packet;
241 wptr = (wptr + 1) % queue_size_dwords;
242 }
243 }
244
245 *buffer_ptr = &queue_address[wptr];
246 kq->pending_wptr = wptr + packet_size_in_dwords;
247
248 return 0;
249}
250
251static void submit_packet(struct kernel_queue *kq)
252{
253#ifdef DEBUG
254 int i;
255#endif
256
257 BUG_ON(!kq);
258
259#ifdef DEBUG
260 for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) {
261 pr_debug("0x%2X ", kq->pq_kernel_addr[i]);
262 if (i % 15 == 0)
263 pr_debug("\n");
264 }
265 pr_debug("\n");
266#endif
267
268 *kq->wptr_kernel = kq->pending_wptr;
269 write_kernel_doorbell(kq->queue->properties.doorbell_ptr,
270 kq->pending_wptr);
271}
272
273static void rollback_packet(struct kernel_queue *kq)
274{
275 BUG_ON(!kq);
276 kq->pending_wptr = *kq->queue->properties.write_ptr;
277}
278
279struct kernel_queue *kernel_queue_init(struct kfd_dev *dev,
280 enum kfd_queue_type type)
281{
282 struct kernel_queue *kq;
283
284 BUG_ON(!dev);
285
286 kq = kzalloc(sizeof(struct kernel_queue), GFP_KERNEL);
287 if (!kq)
288 return NULL;
289
290 kq->ops.initialize = initialize;
291 kq->ops.uninitialize = uninitialize;
292 kq->ops.acquire_packet_buffer = acquire_packet_buffer;
293 kq->ops.submit_packet = submit_packet;
294 kq->ops.rollback_packet = rollback_packet;
295
296 switch (dev->device_info->asic_family) {
297 case CHIP_CARRIZO:
298 kernel_queue_init_vi(&kq->ops_asic_specific);
299 break;
300
301 case CHIP_KAVERI:
302 kernel_queue_init_cik(&kq->ops_asic_specific);
303 break;
304 }
305
306 if (!kq->ops.initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE)) {
307 pr_err("amdkfd: failed to init kernel queue\n");
308 kfree(kq);
309 return NULL;
310 }
311 return kq;
312}
313
314void kernel_queue_uninit(struct kernel_queue *kq)
315{
316 BUG_ON(!kq);
317
318 kq->ops.uninitialize(kq);
319 kfree(kq);
320}
321
322static __attribute__((unused)) void test_kq(struct kfd_dev *dev)
323{
324 struct kernel_queue *kq;
325 uint32_t *buffer, i;
326 int retval;
327
328 BUG_ON(!dev);
329
330 pr_err("amdkfd: starting kernel queue test\n");
331
332 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ);
333 BUG_ON(!kq);
334
335 retval = kq->ops.acquire_packet_buffer(kq, 5, &buffer);
336 BUG_ON(retval != 0);
337 for (i = 0; i < 5; i++)
338 buffer[i] = kq->nop_packet;
339 kq->ops.submit_packet(kq);
340
341 pr_err("amdkfd: ending kernel queue test\n");
342}
343
344
345
