1 /*
2 * Copyright 2015 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 * Authors: Alex Deucher
23 */
24
25 #include "amdgpu.h"
26 #include "amdgpu_trace.h"
27 #include "si.h"
28 #include "sid.h"
29
30 const u32 sdma_offsets[SDMA_MAX_INSTANCE] =
31 {
32 DMA0_REGISTER_OFFSET,
33 DMA1_REGISTER_OFFSET
34 };
35
36 static void si_dma_set_ring_funcs(struct amdgpu_device *adev);
37 static void si_dma_set_buffer_funcs(struct amdgpu_device *adev);
38 static void si_dma_set_vm_pte_funcs(struct amdgpu_device *adev);
39 static void si_dma_set_irq_funcs(struct amdgpu_device *adev);
40
si_dma_ring_get_rptr(struct amdgpu_ring * ring)41 static uint64_t si_dma_ring_get_rptr(struct amdgpu_ring *ring)
42 {
43 return *ring->rptr_cpu_addr;
44 }
45
si_dma_ring_get_wptr(struct amdgpu_ring * ring)46 static uint64_t si_dma_ring_get_wptr(struct amdgpu_ring *ring)
47 {
48 struct amdgpu_device *adev = ring->adev;
49 u32 me = (ring == &adev->sdma.instance[0].ring) ? 0 : 1;
50
51 return (RREG32(DMA_RB_WPTR + sdma_offsets[me]) & 0x3fffc) >> 2;
52 }
53
si_dma_ring_set_wptr(struct amdgpu_ring * ring)54 static void si_dma_ring_set_wptr(struct amdgpu_ring *ring)
55 {
56 struct amdgpu_device *adev = ring->adev;
57 u32 me = (ring == &adev->sdma.instance[0].ring) ? 0 : 1;
58
59 WREG32(DMA_RB_WPTR + sdma_offsets[me], (ring->wptr << 2) & 0x3fffc);
60 }
61
si_dma_ring_emit_ib(struct amdgpu_ring * ring,struct amdgpu_job * job,struct amdgpu_ib * ib,uint32_t flags)62 static void si_dma_ring_emit_ib(struct amdgpu_ring *ring,
63 struct amdgpu_job *job,
64 struct amdgpu_ib *ib,
65 uint32_t flags)
66 {
67 unsigned vmid = AMDGPU_JOB_GET_VMID(job);
68 /* The indirect buffer packet must end on an 8 DW boundary in the DMA ring.
69 * Pad as necessary with NOPs.
70 */
71 while ((lower_32_bits(ring->wptr) & 7) != 5)
72 amdgpu_ring_write(ring, DMA_PACKET(DMA_PACKET_NOP, 0, 0, 0, 0));
73 amdgpu_ring_write(ring, DMA_IB_PACKET(DMA_PACKET_INDIRECT_BUFFER, vmid, 0));
74 amdgpu_ring_write(ring, (ib->gpu_addr & 0xFFFFFFE0));
75 amdgpu_ring_write(ring, (ib->length_dw << 12) | (upper_32_bits(ib->gpu_addr) & 0xFF));
76
77 }
78
79 /**
80 * si_dma_ring_emit_fence - emit a fence on the DMA ring
81 *
82 * @ring: amdgpu ring pointer
83 * @addr: address
84 * @seq: sequence number
85 * @flags: fence related flags
86 *
87 * Add a DMA fence packet to the ring to write
88 * the fence seq number and DMA trap packet to generate
89 * an interrupt if needed (VI).
90 */
si_dma_ring_emit_fence(struct amdgpu_ring * ring,u64 addr,u64 seq,unsigned flags)91 static void si_dma_ring_emit_fence(struct amdgpu_ring *ring, u64 addr, u64 seq,
92 unsigned flags)
93 {
94
95 bool write64bit = flags & AMDGPU_FENCE_FLAG_64BIT;
96 /* write the fence */
97 amdgpu_ring_write(ring, DMA_PACKET(DMA_PACKET_FENCE, 0, 0, 0, 0));
98 amdgpu_ring_write(ring, addr & 0xfffffffc);
99 amdgpu_ring_write(ring, (upper_32_bits(addr) & 0xff));
100 amdgpu_ring_write(ring, seq);
101 /* optionally write high bits as well */
102 if (write64bit) {
103 addr += 4;
104 amdgpu_ring_write(ring, DMA_PACKET(DMA_PACKET_FENCE, 0, 0, 0, 0));
105 amdgpu_ring_write(ring, addr & 0xfffffffc);
106 amdgpu_ring_write(ring, (upper_32_bits(addr) & 0xff));
107 amdgpu_ring_write(ring, upper_32_bits(seq));
108 }
109 /* generate an interrupt */
110 amdgpu_ring_write(ring, DMA_PACKET(DMA_PACKET_TRAP, 0, 0, 0, 0));
111 }
112
si_dma_stop(struct amdgpu_device * adev)113 static void si_dma_stop(struct amdgpu_device *adev)
114 {
115 u32 rb_cntl;
116 unsigned i;
117
118 amdgpu_sdma_unset_buffer_funcs_helper(adev);
119
120 for (i = 0; i < adev->sdma.num_instances; i++) {
121 /* dma0 */
122 rb_cntl = RREG32(DMA_RB_CNTL + sdma_offsets[i]);
123 rb_cntl &= ~DMA_RB_ENABLE;
124 WREG32(DMA_RB_CNTL + sdma_offsets[i], rb_cntl);
125 }
126 }
127
si_dma_start(struct amdgpu_device * adev)128 static int si_dma_start(struct amdgpu_device *adev)
129 {
130 struct amdgpu_ring *ring;
131 u32 rb_cntl, dma_cntl, ib_cntl, rb_bufsz;
132 int i, r;
133 uint64_t rptr_addr;
134
135 for (i = 0; i < adev->sdma.num_instances; i++) {
136 ring = &adev->sdma.instance[i].ring;
137
138 WREG32(DMA_SEM_INCOMPLETE_TIMER_CNTL + sdma_offsets[i], 0);
139 WREG32(DMA_SEM_WAIT_FAIL_TIMER_CNTL + sdma_offsets[i], 0);
140
141 /* Set ring buffer size in dwords */
142 rb_bufsz = order_base_2(ring->ring_size / 4);
143 rb_cntl = rb_bufsz << 1;
144 #ifdef __BIG_ENDIAN
145 rb_cntl |= DMA_RB_SWAP_ENABLE | DMA_RPTR_WRITEBACK_SWAP_ENABLE;
146 #endif
147 WREG32(DMA_RB_CNTL + sdma_offsets[i], rb_cntl);
148
149 /* Initialize the ring buffer's read and write pointers */
150 WREG32(DMA_RB_RPTR + sdma_offsets[i], 0);
151 WREG32(DMA_RB_WPTR + sdma_offsets[i], 0);
152
153 rptr_addr = ring->rptr_gpu_addr;
154
155 WREG32(DMA_RB_RPTR_ADDR_LO + sdma_offsets[i], lower_32_bits(rptr_addr));
156 WREG32(DMA_RB_RPTR_ADDR_HI + sdma_offsets[i], upper_32_bits(rptr_addr) & 0xFF);
157
158 rb_cntl |= DMA_RPTR_WRITEBACK_ENABLE;
159
160 WREG32(DMA_RB_BASE + sdma_offsets[i], ring->gpu_addr >> 8);
161
162 /* enable DMA IBs */
163 ib_cntl = DMA_IB_ENABLE | CMD_VMID_FORCE;
164 #ifdef __BIG_ENDIAN
165 ib_cntl |= DMA_IB_SWAP_ENABLE;
166 #endif
167 WREG32(DMA_IB_CNTL + sdma_offsets[i], ib_cntl);
168
169 dma_cntl = RREG32(DMA_CNTL + sdma_offsets[i]);
170 dma_cntl &= ~CTXEMPTY_INT_ENABLE;
171 WREG32(DMA_CNTL + sdma_offsets[i], dma_cntl);
172
173 ring->wptr = 0;
174 WREG32(DMA_RB_WPTR + sdma_offsets[i], ring->wptr << 2);
175 WREG32(DMA_RB_CNTL + sdma_offsets[i], rb_cntl | DMA_RB_ENABLE);
176
177 ring->sched.ready = true;
178
179 r = amdgpu_ring_test_helper(ring);
180 if (r)
181 return r;
182
183 if (adev->mman.buffer_funcs_ring == ring)
184 amdgpu_ttm_set_buffer_funcs_status(adev, true);
185 }
186
187 return 0;
188 }
189
190 /**
191 * si_dma_ring_test_ring - simple async dma engine test
192 *
193 * @ring: amdgpu_ring structure holding ring information
194 *
195 * Test the DMA engine by writing using it to write an
196 * value to memory. (VI).
197 * Returns 0 for success, error for failure.
198 */
si_dma_ring_test_ring(struct amdgpu_ring * ring)199 static int si_dma_ring_test_ring(struct amdgpu_ring *ring)
200 {
201 struct amdgpu_device *adev = ring->adev;
202 unsigned i;
203 unsigned index;
204 int r;
205 u32 tmp;
206 u64 gpu_addr;
207
208 r = amdgpu_device_wb_get(adev, &index);
209 if (r)
210 return r;
211
212 gpu_addr = adev->wb.gpu_addr + (index * 4);
213 tmp = 0xCAFEDEAD;
214 adev->wb.wb[index] = cpu_to_le32(tmp);
215
216 r = amdgpu_ring_alloc(ring, 4);
217 if (r)
218 goto error_free_wb;
219
220 amdgpu_ring_write(ring, DMA_PACKET(DMA_PACKET_WRITE, 0, 0, 0, 1));
221 amdgpu_ring_write(ring, lower_32_bits(gpu_addr));
222 amdgpu_ring_write(ring, upper_32_bits(gpu_addr) & 0xff);
223 amdgpu_ring_write(ring, 0xDEADBEEF);
224 amdgpu_ring_commit(ring);
225
226 for (i = 0; i < adev->usec_timeout; i++) {
227 tmp = le32_to_cpu(adev->wb.wb[index]);
228 if (tmp == 0xDEADBEEF)
229 break;
230 udelay(1);
231 }
232
233 if (i >= adev->usec_timeout)
234 r = -ETIMEDOUT;
235
236 error_free_wb:
237 amdgpu_device_wb_free(adev, index);
238 return r;
239 }
240
241 /**
242 * si_dma_ring_test_ib - test an IB on the DMA engine
243 *
244 * @ring: amdgpu_ring structure holding ring information
245 * @timeout: timeout value in jiffies, or MAX_SCHEDULE_TIMEOUT
246 *
247 * Test a simple IB in the DMA ring (VI).
248 * Returns 0 on success, error on failure.
249 */
si_dma_ring_test_ib(struct amdgpu_ring * ring,long timeout)250 static int si_dma_ring_test_ib(struct amdgpu_ring *ring, long timeout)
251 {
252 struct amdgpu_device *adev = ring->adev;
253 struct amdgpu_ib ib;
254 struct dma_fence *f = NULL;
255 unsigned index;
256 u32 tmp = 0;
257 u64 gpu_addr;
258 long r;
259
260 r = amdgpu_device_wb_get(adev, &index);
261 if (r)
262 return r;
263
264 gpu_addr = adev->wb.gpu_addr + (index * 4);
265 tmp = 0xCAFEDEAD;
266 adev->wb.wb[index] = cpu_to_le32(tmp);
267 memset(&ib, 0, sizeof(ib));
268 r = amdgpu_ib_get(adev, NULL, 256,
269 AMDGPU_IB_POOL_DIRECT, &ib);
270 if (r)
271 goto err0;
272
273 ib.ptr[0] = DMA_PACKET(DMA_PACKET_WRITE, 0, 0, 0, 1);
274 ib.ptr[1] = lower_32_bits(gpu_addr);
275 ib.ptr[2] = upper_32_bits(gpu_addr) & 0xff;
276 ib.ptr[3] = 0xDEADBEEF;
277 ib.length_dw = 4;
278 r = amdgpu_ib_schedule(ring, 1, &ib, NULL, &f);
279 if (r)
280 goto err1;
281
282 r = dma_fence_wait_timeout(f, false, timeout);
283 if (r == 0) {
284 r = -ETIMEDOUT;
285 goto err1;
286 } else if (r < 0) {
287 goto err1;
288 }
289 tmp = le32_to_cpu(adev->wb.wb[index]);
290 if (tmp == 0xDEADBEEF)
291 r = 0;
292 else
293 r = -EINVAL;
294
295 err1:
296 amdgpu_ib_free(adev, &ib, NULL);
297 dma_fence_put(f);
298 err0:
299 amdgpu_device_wb_free(adev, index);
300 return r;
301 }
302
303 /**
304 * si_dma_vm_copy_pte - update PTEs by copying them from the GART
305 *
306 * @ib: indirect buffer to fill with commands
307 * @pe: addr of the page entry
308 * @src: src addr to copy from
309 * @count: number of page entries to update
310 *
311 * Update PTEs by copying them from the GART using DMA (SI).
312 */
si_dma_vm_copy_pte(struct amdgpu_ib * ib,uint64_t pe,uint64_t src,unsigned count)313 static void si_dma_vm_copy_pte(struct amdgpu_ib *ib,
314 uint64_t pe, uint64_t src,
315 unsigned count)
316 {
317 unsigned bytes = count * 8;
318
319 ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_COPY,
320 1, 0, 0, bytes);
321 ib->ptr[ib->length_dw++] = lower_32_bits(pe);
322 ib->ptr[ib->length_dw++] = lower_32_bits(src);
323 ib->ptr[ib->length_dw++] = upper_32_bits(pe) & 0xff;
324 ib->ptr[ib->length_dw++] = upper_32_bits(src) & 0xff;
325 }
326
327 /**
328 * si_dma_vm_write_pte - update PTEs by writing them manually
329 *
330 * @ib: indirect buffer to fill with commands
331 * @pe: addr of the page entry
332 * @value: dst addr to write into pe
333 * @count: number of page entries to update
334 * @incr: increase next addr by incr bytes
335 *
336 * Update PTEs by writing them manually using DMA (SI).
337 */
si_dma_vm_write_pte(struct amdgpu_ib * ib,uint64_t pe,uint64_t value,unsigned count,uint32_t incr)338 static void si_dma_vm_write_pte(struct amdgpu_ib *ib, uint64_t pe,
339 uint64_t value, unsigned count,
340 uint32_t incr)
341 {
342 unsigned ndw = count * 2;
343
344 ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_WRITE, 0, 0, 0, ndw);
345 ib->ptr[ib->length_dw++] = lower_32_bits(pe);
346 ib->ptr[ib->length_dw++] = upper_32_bits(pe);
347 for (; ndw > 0; ndw -= 2) {
348 ib->ptr[ib->length_dw++] = lower_32_bits(value);
349 ib->ptr[ib->length_dw++] = upper_32_bits(value);
350 value += incr;
351 }
352 }
353
354 /**
355 * si_dma_vm_set_pte_pde - update the page tables using sDMA
356 *
357 * @ib: indirect buffer to fill with commands
358 * @pe: addr of the page entry
359 * @addr: dst addr to write into pe
360 * @count: number of page entries to update
361 * @incr: increase next addr by incr bytes
362 * @flags: access flags
363 *
364 * Update the page tables using sDMA (CIK).
365 */
si_dma_vm_set_pte_pde(struct amdgpu_ib * ib,uint64_t pe,uint64_t addr,unsigned count,uint32_t incr,uint64_t flags)366 static void si_dma_vm_set_pte_pde(struct amdgpu_ib *ib,
367 uint64_t pe,
368 uint64_t addr, unsigned count,
369 uint32_t incr, uint64_t flags)
370 {
371 uint64_t value;
372 unsigned ndw;
373
374 while (count) {
375 ndw = count * 2;
376 if (ndw > 0xFFFFE)
377 ndw = 0xFFFFE;
378
379 if (flags & AMDGPU_PTE_VALID)
380 value = addr;
381 else
382 value = 0;
383
384 /* for physically contiguous pages (vram) */
385 ib->ptr[ib->length_dw++] = DMA_PTE_PDE_PACKET(ndw);
386 ib->ptr[ib->length_dw++] = pe; /* dst addr */
387 ib->ptr[ib->length_dw++] = upper_32_bits(pe) & 0xff;
388 ib->ptr[ib->length_dw++] = lower_32_bits(flags); /* mask */
389 ib->ptr[ib->length_dw++] = upper_32_bits(flags);
390 ib->ptr[ib->length_dw++] = value; /* value */
391 ib->ptr[ib->length_dw++] = upper_32_bits(value);
392 ib->ptr[ib->length_dw++] = incr; /* increment size */
393 ib->ptr[ib->length_dw++] = 0;
394 pe += ndw * 4;
395 addr += (ndw / 2) * incr;
396 count -= ndw / 2;
397 }
398 }
399
400 /**
401 * si_dma_ring_pad_ib - pad the IB to the required number of dw
402 *
403 * @ring: amdgpu_ring pointer
404 * @ib: indirect buffer to fill with padding
405 *
406 */
si_dma_ring_pad_ib(struct amdgpu_ring * ring,struct amdgpu_ib * ib)407 static void si_dma_ring_pad_ib(struct amdgpu_ring *ring, struct amdgpu_ib *ib)
408 {
409 while (ib->length_dw & 0x7)
410 ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_NOP, 0, 0, 0, 0);
411 }
412
413 /**
414 * si_dma_ring_emit_pipeline_sync - sync the pipeline
415 *
416 * @ring: amdgpu_ring pointer
417 *
418 * Make sure all previous operations are completed (CIK).
419 */
si_dma_ring_emit_pipeline_sync(struct amdgpu_ring * ring)420 static void si_dma_ring_emit_pipeline_sync(struct amdgpu_ring *ring)
421 {
422 uint32_t seq = ring->fence_drv.sync_seq;
423 uint64_t addr = ring->fence_drv.gpu_addr;
424
425 /* wait for idle */
426 amdgpu_ring_write(ring, DMA_PACKET(DMA_PACKET_POLL_REG_MEM, 0, 0, 0, 0) |
427 (1 << 27)); /* Poll memory */
428 amdgpu_ring_write(ring, lower_32_bits(addr));
429 amdgpu_ring_write(ring, (0xff << 16) | upper_32_bits(addr)); /* retry, addr_hi */
430 amdgpu_ring_write(ring, 0xffffffff); /* mask */
431 amdgpu_ring_write(ring, seq); /* value */
432 amdgpu_ring_write(ring, (3 << 28) | 0x20); /* func(equal) | poll interval */
433 }
434
435 /**
436 * si_dma_ring_emit_vm_flush - cik vm flush using sDMA
437 *
438 * @ring: amdgpu_ring pointer
439 * @vmid: vmid number to use
440 * @pd_addr: address
441 *
442 * Update the page table base and flush the VM TLB
443 * using sDMA (VI).
444 */
si_dma_ring_emit_vm_flush(struct amdgpu_ring * ring,unsigned vmid,uint64_t pd_addr)445 static void si_dma_ring_emit_vm_flush(struct amdgpu_ring *ring,
446 unsigned vmid, uint64_t pd_addr)
447 {
448 amdgpu_gmc_emit_flush_gpu_tlb(ring, vmid, pd_addr);
449
450 /* wait for invalidate to complete */
451 amdgpu_ring_write(ring, DMA_PACKET(DMA_PACKET_POLL_REG_MEM, 0, 0, 0, 0));
452 amdgpu_ring_write(ring, VM_INVALIDATE_REQUEST);
453 amdgpu_ring_write(ring, 0xff << 16); /* retry */
454 amdgpu_ring_write(ring, 1 << vmid); /* mask */
455 amdgpu_ring_write(ring, 0); /* value */
456 amdgpu_ring_write(ring, (0 << 28) | 0x20); /* func(always) | poll interval */
457 }
458
si_dma_ring_emit_wreg(struct amdgpu_ring * ring,uint32_t reg,uint32_t val)459 static void si_dma_ring_emit_wreg(struct amdgpu_ring *ring,
460 uint32_t reg, uint32_t val)
461 {
462 amdgpu_ring_write(ring, DMA_PACKET(DMA_PACKET_SRBM_WRITE, 0, 0, 0, 0));
463 amdgpu_ring_write(ring, (0xf << 16) | reg);
464 amdgpu_ring_write(ring, val);
465 }
466
si_dma_early_init(void * handle)467 static int si_dma_early_init(void *handle)
468 {
469 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
470
471 adev->sdma.num_instances = 2;
472
473 si_dma_set_ring_funcs(adev);
474 si_dma_set_buffer_funcs(adev);
475 si_dma_set_vm_pte_funcs(adev);
476 si_dma_set_irq_funcs(adev);
477
478 return 0;
479 }
480
si_dma_sw_init(void * handle)481 static int si_dma_sw_init(void *handle)
482 {
483 struct amdgpu_ring *ring;
484 int r, i;
485 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
486
487 /* DMA0 trap event */
488 r = amdgpu_irq_add_id(adev, AMDGPU_IRQ_CLIENTID_LEGACY, 224,
489 &adev->sdma.trap_irq);
490 if (r)
491 return r;
492
493 /* DMA1 trap event */
494 r = amdgpu_irq_add_id(adev, AMDGPU_IRQ_CLIENTID_LEGACY, 244,
495 &adev->sdma.trap_irq);
496 if (r)
497 return r;
498
499 for (i = 0; i < adev->sdma.num_instances; i++) {
500 ring = &adev->sdma.instance[i].ring;
501 ring->ring_obj = NULL;
502 ring->use_doorbell = false;
503 sprintf(ring->name, "sdma%d", i);
504 r = amdgpu_ring_init(adev, ring, 1024,
505 &adev->sdma.trap_irq,
506 (i == 0) ? AMDGPU_SDMA_IRQ_INSTANCE0 :
507 AMDGPU_SDMA_IRQ_INSTANCE1,
508 AMDGPU_RING_PRIO_DEFAULT, NULL);
509 if (r)
510 return r;
511 }
512
513 return r;
514 }
515
si_dma_sw_fini(void * handle)516 static int si_dma_sw_fini(void *handle)
517 {
518 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
519 int i;
520
521 for (i = 0; i < adev->sdma.num_instances; i++)
522 amdgpu_ring_fini(&adev->sdma.instance[i].ring);
523
524 return 0;
525 }
526
si_dma_hw_init(void * handle)527 static int si_dma_hw_init(void *handle)
528 {
529 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
530
531 return si_dma_start(adev);
532 }
533
si_dma_hw_fini(void * handle)534 static int si_dma_hw_fini(void *handle)
535 {
536 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
537
538 si_dma_stop(adev);
539
540 return 0;
541 }
542
si_dma_suspend(void * handle)543 static int si_dma_suspend(void *handle)
544 {
545 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
546
547 return si_dma_hw_fini(adev);
548 }
549
si_dma_resume(void * handle)550 static int si_dma_resume(void *handle)
551 {
552 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
553
554 return si_dma_hw_init(adev);
555 }
556
si_dma_is_idle(void * handle)557 static bool si_dma_is_idle(void *handle)
558 {
559 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
560 u32 tmp = RREG32(SRBM_STATUS2);
561
562 if (tmp & (DMA_BUSY_MASK | DMA1_BUSY_MASK))
563 return false;
564
565 return true;
566 }
567
si_dma_wait_for_idle(void * handle)568 static int si_dma_wait_for_idle(void *handle)
569 {
570 unsigned i;
571 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
572
573 for (i = 0; i < adev->usec_timeout; i++) {
574 if (si_dma_is_idle(handle))
575 return 0;
576 udelay(1);
577 }
578 return -ETIMEDOUT;
579 }
580
si_dma_soft_reset(void * handle)581 static int si_dma_soft_reset(void *handle)
582 {
583 DRM_INFO("si_dma_soft_reset --- not implemented !!!!!!!\n");
584 return 0;
585 }
586
si_dma_set_trap_irq_state(struct amdgpu_device * adev,struct amdgpu_irq_src * src,unsigned type,enum amdgpu_interrupt_state state)587 static int si_dma_set_trap_irq_state(struct amdgpu_device *adev,
588 struct amdgpu_irq_src *src,
589 unsigned type,
590 enum amdgpu_interrupt_state state)
591 {
592 u32 sdma_cntl;
593
594 switch (type) {
595 case AMDGPU_SDMA_IRQ_INSTANCE0:
596 switch (state) {
597 case AMDGPU_IRQ_STATE_DISABLE:
598 sdma_cntl = RREG32(DMA_CNTL + DMA0_REGISTER_OFFSET);
599 sdma_cntl &= ~TRAP_ENABLE;
600 WREG32(DMA_CNTL + DMA0_REGISTER_OFFSET, sdma_cntl);
601 break;
602 case AMDGPU_IRQ_STATE_ENABLE:
603 sdma_cntl = RREG32(DMA_CNTL + DMA0_REGISTER_OFFSET);
604 sdma_cntl |= TRAP_ENABLE;
605 WREG32(DMA_CNTL + DMA0_REGISTER_OFFSET, sdma_cntl);
606 break;
607 default:
608 break;
609 }
610 break;
611 case AMDGPU_SDMA_IRQ_INSTANCE1:
612 switch (state) {
613 case AMDGPU_IRQ_STATE_DISABLE:
614 sdma_cntl = RREG32(DMA_CNTL + DMA1_REGISTER_OFFSET);
615 sdma_cntl &= ~TRAP_ENABLE;
616 WREG32(DMA_CNTL + DMA1_REGISTER_OFFSET, sdma_cntl);
617 break;
618 case AMDGPU_IRQ_STATE_ENABLE:
619 sdma_cntl = RREG32(DMA_CNTL + DMA1_REGISTER_OFFSET);
620 sdma_cntl |= TRAP_ENABLE;
621 WREG32(DMA_CNTL + DMA1_REGISTER_OFFSET, sdma_cntl);
622 break;
623 default:
624 break;
625 }
626 break;
627 default:
628 break;
629 }
630 return 0;
631 }
632
si_dma_process_trap_irq(struct amdgpu_device * adev,struct amdgpu_irq_src * source,struct amdgpu_iv_entry * entry)633 static int si_dma_process_trap_irq(struct amdgpu_device *adev,
634 struct amdgpu_irq_src *source,
635 struct amdgpu_iv_entry *entry)
636 {
637 if (entry->src_id == 224)
638 amdgpu_fence_process(&adev->sdma.instance[0].ring);
639 else
640 amdgpu_fence_process(&adev->sdma.instance[1].ring);
641 return 0;
642 }
643
si_dma_set_clockgating_state(void * handle,enum amd_clockgating_state state)644 static int si_dma_set_clockgating_state(void *handle,
645 enum amd_clockgating_state state)
646 {
647 u32 orig, data, offset;
648 int i;
649 bool enable;
650 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
651
652 enable = (state == AMD_CG_STATE_GATE);
653
654 if (enable && (adev->cg_flags & AMD_CG_SUPPORT_SDMA_MGCG)) {
655 for (i = 0; i < adev->sdma.num_instances; i++) {
656 if (i == 0)
657 offset = DMA0_REGISTER_OFFSET;
658 else
659 offset = DMA1_REGISTER_OFFSET;
660 orig = data = RREG32(DMA_POWER_CNTL + offset);
661 data &= ~MEM_POWER_OVERRIDE;
662 if (data != orig)
663 WREG32(DMA_POWER_CNTL + offset, data);
664 WREG32(DMA_CLK_CTRL + offset, 0x00000100);
665 }
666 } else {
667 for (i = 0; i < adev->sdma.num_instances; i++) {
668 if (i == 0)
669 offset = DMA0_REGISTER_OFFSET;
670 else
671 offset = DMA1_REGISTER_OFFSET;
672 orig = data = RREG32(DMA_POWER_CNTL + offset);
673 data |= MEM_POWER_OVERRIDE;
674 if (data != orig)
675 WREG32(DMA_POWER_CNTL + offset, data);
676
677 orig = data = RREG32(DMA_CLK_CTRL + offset);
678 data = 0xff000000;
679 if (data != orig)
680 WREG32(DMA_CLK_CTRL + offset, data);
681 }
682 }
683
684 return 0;
685 }
686
si_dma_set_powergating_state(void * handle,enum amd_powergating_state state)687 static int si_dma_set_powergating_state(void *handle,
688 enum amd_powergating_state state)
689 {
690 u32 tmp;
691
692 struct amdgpu_device *adev = (struct amdgpu_device *)handle;
693
694 WREG32(DMA_PGFSM_WRITE, 0x00002000);
695 WREG32(DMA_PGFSM_CONFIG, 0x100010ff);
696
697 for (tmp = 0; tmp < 5; tmp++)
698 WREG32(DMA_PGFSM_WRITE, 0);
699
700 return 0;
701 }
702
703 static const struct amd_ip_funcs si_dma_ip_funcs = {
704 .name = "si_dma",
705 .early_init = si_dma_early_init,
706 .late_init = NULL,
707 .sw_init = si_dma_sw_init,
708 .sw_fini = si_dma_sw_fini,
709 .hw_init = si_dma_hw_init,
710 .hw_fini = si_dma_hw_fini,
711 .suspend = si_dma_suspend,
712 .resume = si_dma_resume,
713 .is_idle = si_dma_is_idle,
714 .wait_for_idle = si_dma_wait_for_idle,
715 .soft_reset = si_dma_soft_reset,
716 .set_clockgating_state = si_dma_set_clockgating_state,
717 .set_powergating_state = si_dma_set_powergating_state,
718 };
719
720 static const struct amdgpu_ring_funcs si_dma_ring_funcs = {
721 .type = AMDGPU_RING_TYPE_SDMA,
722 .align_mask = 0xf,
723 .nop = DMA_PACKET(DMA_PACKET_NOP, 0, 0, 0, 0),
724 .support_64bit_ptrs = false,
725 .get_rptr = si_dma_ring_get_rptr,
726 .get_wptr = si_dma_ring_get_wptr,
727 .set_wptr = si_dma_ring_set_wptr,
728 .emit_frame_size =
729 3 + 3 + /* hdp flush / invalidate */
730 6 + /* si_dma_ring_emit_pipeline_sync */
731 SI_FLUSH_GPU_TLB_NUM_WREG * 3 + 6 + /* si_dma_ring_emit_vm_flush */
732 9 + 9 + 9, /* si_dma_ring_emit_fence x3 for user fence, vm fence */
733 .emit_ib_size = 7 + 3, /* si_dma_ring_emit_ib */
734 .emit_ib = si_dma_ring_emit_ib,
735 .emit_fence = si_dma_ring_emit_fence,
736 .emit_pipeline_sync = si_dma_ring_emit_pipeline_sync,
737 .emit_vm_flush = si_dma_ring_emit_vm_flush,
738 .test_ring = si_dma_ring_test_ring,
739 .test_ib = si_dma_ring_test_ib,
740 .insert_nop = amdgpu_ring_insert_nop,
741 .pad_ib = si_dma_ring_pad_ib,
742 .emit_wreg = si_dma_ring_emit_wreg,
743 };
744
si_dma_set_ring_funcs(struct amdgpu_device * adev)745 static void si_dma_set_ring_funcs(struct amdgpu_device *adev)
746 {
747 int i;
748
749 for (i = 0; i < adev->sdma.num_instances; i++)
750 adev->sdma.instance[i].ring.funcs = &si_dma_ring_funcs;
751 }
752
753 static const struct amdgpu_irq_src_funcs si_dma_trap_irq_funcs = {
754 .set = si_dma_set_trap_irq_state,
755 .process = si_dma_process_trap_irq,
756 };
757
si_dma_set_irq_funcs(struct amdgpu_device * adev)758 static void si_dma_set_irq_funcs(struct amdgpu_device *adev)
759 {
760 adev->sdma.trap_irq.num_types = AMDGPU_SDMA_IRQ_LAST;
761 adev->sdma.trap_irq.funcs = &si_dma_trap_irq_funcs;
762 }
763
764 /**
765 * si_dma_emit_copy_buffer - copy buffer using the sDMA engine
766 *
767 * @ib: indirect buffer to copy to
768 * @src_offset: src GPU address
769 * @dst_offset: dst GPU address
770 * @byte_count: number of bytes to xfer
771 * @tmz: is this a secure operation
772 *
773 * Copy GPU buffers using the DMA engine (VI).
774 * Used by the amdgpu ttm implementation to move pages if
775 * registered as the asic copy callback.
776 */
si_dma_emit_copy_buffer(struct amdgpu_ib * ib,uint64_t src_offset,uint64_t dst_offset,uint32_t byte_count,bool tmz)777 static void si_dma_emit_copy_buffer(struct amdgpu_ib *ib,
778 uint64_t src_offset,
779 uint64_t dst_offset,
780 uint32_t byte_count,
781 bool tmz)
782 {
783 ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_COPY,
784 1, 0, 0, byte_count);
785 ib->ptr[ib->length_dw++] = lower_32_bits(dst_offset);
786 ib->ptr[ib->length_dw++] = lower_32_bits(src_offset);
787 ib->ptr[ib->length_dw++] = upper_32_bits(dst_offset) & 0xff;
788 ib->ptr[ib->length_dw++] = upper_32_bits(src_offset) & 0xff;
789 }
790
791 /**
792 * si_dma_emit_fill_buffer - fill buffer using the sDMA engine
793 *
794 * @ib: indirect buffer to copy to
795 * @src_data: value to write to buffer
796 * @dst_offset: dst GPU address
797 * @byte_count: number of bytes to xfer
798 *
799 * Fill GPU buffers using the DMA engine (VI).
800 */
si_dma_emit_fill_buffer(struct amdgpu_ib * ib,uint32_t src_data,uint64_t dst_offset,uint32_t byte_count)801 static void si_dma_emit_fill_buffer(struct amdgpu_ib *ib,
802 uint32_t src_data,
803 uint64_t dst_offset,
804 uint32_t byte_count)
805 {
806 ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_CONSTANT_FILL,
807 0, 0, 0, byte_count / 4);
808 ib->ptr[ib->length_dw++] = lower_32_bits(dst_offset);
809 ib->ptr[ib->length_dw++] = src_data;
810 ib->ptr[ib->length_dw++] = upper_32_bits(dst_offset) << 16;
811 }
812
813
814 static const struct amdgpu_buffer_funcs si_dma_buffer_funcs = {
815 .copy_max_bytes = 0xffff8,
816 .copy_num_dw = 5,
817 .emit_copy_buffer = si_dma_emit_copy_buffer,
818
819 .fill_max_bytes = 0xffff8,
820 .fill_num_dw = 4,
821 .emit_fill_buffer = si_dma_emit_fill_buffer,
822 };
823
si_dma_set_buffer_funcs(struct amdgpu_device * adev)824 static void si_dma_set_buffer_funcs(struct amdgpu_device *adev)
825 {
826 adev->mman.buffer_funcs = &si_dma_buffer_funcs;
827 adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
828 }
829
830 static const struct amdgpu_vm_pte_funcs si_dma_vm_pte_funcs = {
831 .copy_pte_num_dw = 5,
832 .copy_pte = si_dma_vm_copy_pte,
833
834 .write_pte = si_dma_vm_write_pte,
835 .set_pte_pde = si_dma_vm_set_pte_pde,
836 };
837
si_dma_set_vm_pte_funcs(struct amdgpu_device * adev)838 static void si_dma_set_vm_pte_funcs(struct amdgpu_device *adev)
839 {
840 unsigned i;
841
842 adev->vm_manager.vm_pte_funcs = &si_dma_vm_pte_funcs;
843 for (i = 0; i < adev->sdma.num_instances; i++) {
844 adev->vm_manager.vm_pte_scheds[i] =
845 &adev->sdma.instance[i].ring.sched;
846 }
847 adev->vm_manager.vm_pte_num_scheds = adev->sdma.num_instances;
848 }
849
850 const struct amdgpu_ip_block_version si_dma_ip_block =
851 {
852 .type = AMD_IP_BLOCK_TYPE_SDMA,
853 .major = 1,
854 .minor = 0,
855 .rev = 0,
856 .funcs = &si_dma_ip_funcs,
857 };
858