xref: /linux/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c (revision 5f30ee493044e9ea3a46167e5597a96f5c302adb) 
1 /*
2  * Copyright 2014 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  */
23 
24 #include "amdgpu.h"
25 #include "nbio/nbio_2_3_offset.h"
26 #include "nbio/nbio_2_3_sh_mask.h"
27 #include "gc/gc_10_1_0_offset.h"
28 #include "gc/gc_10_1_0_sh_mask.h"
29 #include "soc15.h"
30 #include "navi10_ih.h"
31 #include "soc15_common.h"
32 #include "mxgpu_nv.h"
33 
34 #include "amdgpu_reset.h"
35 
36 static void xgpu_nv_mailbox_send_ack(struct amdgpu_device *adev)
37 {
38 	WREG8(NV_MAIBOX_CONTROL_RCV_OFFSET_BYTE, 2);
39 }
40 
41 static void xgpu_nv_mailbox_set_valid(struct amdgpu_device *adev, bool val)
42 {
43 	WREG8(NV_MAIBOX_CONTROL_TRN_OFFSET_BYTE, val ? 1 : 0);
44 }
45 
46 /*
47  * this peek_msg could *only* be called in IRQ routine becuase in IRQ routine
48  * RCV_MSG_VALID filed of BIF_BX_PF_MAILBOX_CONTROL must already be set to 1
49  * by host.
50  *
51  * if called no in IRQ routine, this peek_msg cannot guaranteed to return the
52  * correct value since it doesn't return the RCV_DW0 under the case that
53  * RCV_MSG_VALID is set by host.
54  */
55 static enum idh_event xgpu_nv_mailbox_peek_msg(struct amdgpu_device *adev)
56 {
57 	return RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW0);
58 }
59 
60 
61 static int xgpu_nv_mailbox_rcv_msg(struct amdgpu_device *adev,
62 				   enum idh_event event)
63 {
64 	u32 reg;
65 
66 	reg = RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW0);
67 	if (reg != event)
68 		return -ENOENT;
69 
70 	xgpu_nv_mailbox_send_ack(adev);
71 
72 	return 0;
73 }
74 
75 static uint8_t xgpu_nv_peek_ack(struct amdgpu_device *adev)
76 {
77 	return RREG8(NV_MAIBOX_CONTROL_TRN_OFFSET_BYTE) & 2;
78 }
79 
80 static int xgpu_nv_poll_ack(struct amdgpu_device *adev)
81 {
82 	int timeout  = NV_MAILBOX_POLL_ACK_TIMEDOUT;
83 	u8 reg;
84 
85 	do {
86 		reg = RREG8(NV_MAIBOX_CONTROL_TRN_OFFSET_BYTE);
87 		if (reg & 2)
88 			return 0;
89 
90 		mdelay(5);
91 		timeout -= 5;
92 	} while (timeout > 1);
93 
94 	dev_err(adev->dev, "Doesn't get TRN_MSG_ACK from pf in %d msec \n", NV_MAILBOX_POLL_ACK_TIMEDOUT);
95 
96 	return -ETIME;
97 }
98 
99 static int xgpu_nv_poll_msg(struct amdgpu_device *adev, enum idh_event event)
100 {
101 	int r;
102 	uint64_t timeout, now;
103 
104 	now = (uint64_t)ktime_to_ms(ktime_get());
105 	timeout = now + NV_MAILBOX_POLL_MSG_TIMEDOUT;
106 
107 	do {
108 		r = xgpu_nv_mailbox_rcv_msg(adev, event);
109 		if (!r) {
110 			dev_dbg(adev->dev, "rcv_msg 0x%x after %llu ms\n", event, NV_MAILBOX_POLL_MSG_TIMEDOUT - timeout + now);
111 			return 0;
112 		}
113 
114 		msleep(10);
115 		now = (uint64_t)ktime_to_ms(ktime_get());
116 	} while (timeout > now);
117 
118 	dev_dbg(adev->dev, "nv_poll_msg timed out\n");
119 
120 	return -ETIME;
121 }
122 
123 static void xgpu_nv_mailbox_trans_msg (struct amdgpu_device *adev,
124 	      enum idh_request req, u32 data1, u32 data2, u32 data3)
125 {
126 	int r;
127 	uint8_t trn;
128 
129 	/* IMPORTANT:
130 	 * clear TRN_MSG_VALID valid to clear host's RCV_MSG_ACK
131 	 * and with host's RCV_MSG_ACK cleared hw automatically clear host's RCV_MSG_ACK
132 	 * which lead to VF's TRN_MSG_ACK cleared, otherwise below xgpu_nv_poll_ack()
133 	 * will return immediatly
134 	 */
135 	do {
136 		xgpu_nv_mailbox_set_valid(adev, false);
137 		trn = xgpu_nv_peek_ack(adev);
138 		if (trn) {
139 			dev_err_ratelimited(adev->dev, "trn=%x ACK should not assert! wait again !\n", trn);
140 			msleep(1);
141 		}
142 	} while (trn);
143 
144 	dev_dbg(adev->dev, "trans_msg req = 0x%x, data1 = 0x%x\n", req, data1);
145 	WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW0, req);
146 	WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW1, data1);
147 	WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW2, data2);
148 	WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW3, data3);
149 	xgpu_nv_mailbox_set_valid(adev, true);
150 
151 	/* start to poll ack */
152 	r = xgpu_nv_poll_ack(adev);
153 	if (r)
154 		dev_err(adev->dev, "Doesn't get ack from pf, continue\n");
155 
156 	xgpu_nv_mailbox_set_valid(adev, false);
157 }
158 
159 static int xgpu_nv_send_access_requests_with_param(struct amdgpu_device *adev,
160 			enum idh_request req, u32 data1, u32 data2, u32 data3)
161 {
162 	int r, retry = 1;
163 	enum idh_event event = -1;
164 
165 send_request:
166 	xgpu_nv_mailbox_trans_msg(adev, req, data1, data2, data3);
167 
168 	switch (req) {
169 	case IDH_REQ_GPU_INIT_ACCESS:
170 	case IDH_REQ_GPU_FINI_ACCESS:
171 	case IDH_REQ_GPU_RESET_ACCESS:
172 		event = IDH_READY_TO_ACCESS_GPU;
173 		break;
174 	case IDH_REQ_GPU_INIT_DATA:
175 		event = IDH_REQ_GPU_INIT_DATA_READY;
176 		break;
177 	case IDH_RAS_POISON:
178 		if (data1 != 0)
179 			event = IDH_RAS_POISON_READY;
180 		break;
181 	default:
182 		break;
183 	}
184 
185 	if (event != -1) {
186 		r = xgpu_nv_poll_msg(adev, event);
187 		if (r) {
188 			if (retry++ < 5)
189 				goto send_request;
190 
191 			if (req != IDH_REQ_GPU_INIT_DATA) {
192 				dev_err(adev->dev, "Doesn't get msg:%d from pf, error=%d\n", event, r);
193 				return r;
194 			} else /* host doesn't support REQ_GPU_INIT_DATA handshake */
195 				adev->virt.req_init_data_ver = 0;
196 		} else {
197 			if (req == IDH_REQ_GPU_INIT_DATA) {
198 				adev->virt.req_init_data_ver =
199 					RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW1);
200 
201 				/* assume V1 in case host doesn't set version number */
202 				if (adev->virt.req_init_data_ver < 1)
203 					adev->virt.req_init_data_ver = 1;
204 			}
205 		}
206 
207 		/* Retrieve checksum from mailbox2 */
208 		if (req == IDH_REQ_GPU_INIT_ACCESS || req == IDH_REQ_GPU_RESET_ACCESS) {
209 			adev->virt.fw_reserve.checksum_key =
210 				RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW2);
211 		}
212 	}
213 
214 	return 0;
215 }
216 
217 static int xgpu_nv_send_access_requests(struct amdgpu_device *adev,
218 					enum idh_request req)
219 {
220 	return xgpu_nv_send_access_requests_with_param(adev,
221 						req, 0, 0, 0);
222 }
223 
224 static int xgpu_nv_request_reset(struct amdgpu_device *adev)
225 {
226 	int ret, i = 0;
227 
228 	while (i < NV_MAILBOX_POLL_MSG_REP_MAX) {
229 		ret = xgpu_nv_send_access_requests(adev, IDH_REQ_GPU_RESET_ACCESS);
230 		if (!ret)
231 			break;
232 		i++;
233 	}
234 
235 	return ret;
236 }
237 
238 static int xgpu_nv_request_full_gpu_access(struct amdgpu_device *adev,
239 					   bool init)
240 {
241 	enum idh_request req;
242 
243 	req = init ? IDH_REQ_GPU_INIT_ACCESS : IDH_REQ_GPU_FINI_ACCESS;
244 	return xgpu_nv_send_access_requests(adev, req);
245 }
246 
247 static int xgpu_nv_release_full_gpu_access(struct amdgpu_device *adev,
248 					   bool init)
249 {
250 	enum idh_request req;
251 	int r = 0;
252 
253 	req = init ? IDH_REL_GPU_INIT_ACCESS : IDH_REL_GPU_FINI_ACCESS;
254 	r = xgpu_nv_send_access_requests(adev, req);
255 
256 	return r;
257 }
258 
259 static int xgpu_nv_request_init_data(struct amdgpu_device *adev)
260 {
261 	return xgpu_nv_send_access_requests(adev, IDH_REQ_GPU_INIT_DATA);
262 }
263 
264 static int xgpu_nv_mailbox_ack_irq(struct amdgpu_device *adev,
265 					struct amdgpu_irq_src *source,
266 					struct amdgpu_iv_entry *entry)
267 {
268 	dev_dbg(adev->dev, "get ack intr and do nothing.\n");
269 	return 0;
270 }
271 
272 static int xgpu_nv_set_mailbox_ack_irq(struct amdgpu_device *adev,
273 					struct amdgpu_irq_src *source,
274 					unsigned type,
275 					enum amdgpu_interrupt_state state)
276 {
277 	u32 tmp = RREG32_NO_KIQ(mmMAILBOX_INT_CNTL);
278 
279 	if (state == AMDGPU_IRQ_STATE_ENABLE)
280 		tmp |= 2;
281 	else
282 		tmp &= ~2;
283 
284 	WREG32_NO_KIQ(mmMAILBOX_INT_CNTL, tmp);
285 
286 	return 0;
287 }
288 
289 static void xgpu_nv_ready_to_reset(struct amdgpu_device *adev)
290 {
291 	xgpu_nv_mailbox_trans_msg(adev, IDH_READY_TO_RESET, 0, 0, 0);
292 }
293 
294 static int xgpu_nv_wait_reset(struct amdgpu_device *adev)
295 {
296 	int timeout = NV_MAILBOX_POLL_FLR_TIMEDOUT;
297 	do {
298 		if (xgpu_nv_mailbox_peek_msg(adev) == IDH_FLR_NOTIFICATION_CMPL) {
299 			dev_dbg(adev->dev, "Got NV IDH_FLR_NOTIFICATION_CMPL after %d ms\n", NV_MAILBOX_POLL_FLR_TIMEDOUT - timeout);
300 			return 0;
301 		}
302 		msleep(10);
303 		timeout -= 10;
304 	} while (timeout > 1);
305 
306 	dev_dbg(adev->dev, "waiting NV IDH_FLR_NOTIFICATION_CMPL timeout\n");
307 	return -ETIME;
308 }
309 
310 static void xgpu_nv_mailbox_flr_work(struct work_struct *work)
311 {
312 	struct amdgpu_virt *virt = container_of(work, struct amdgpu_virt, flr_work);
313 	struct amdgpu_device *adev = container_of(virt, struct amdgpu_device, virt);
314 
315 	amdgpu_virt_fini_data_exchange(adev);
316 
317 	/* Trigger recovery for world switch failure if no TDR */
318 	if (amdgpu_device_should_recover_gpu(adev)
319 		&& (!amdgpu_device_has_job_running(adev) ||
320 		adev->sdma_timeout == MAX_SCHEDULE_TIMEOUT ||
321 		adev->gfx_timeout == MAX_SCHEDULE_TIMEOUT ||
322 		adev->compute_timeout == MAX_SCHEDULE_TIMEOUT ||
323 		adev->video_timeout == MAX_SCHEDULE_TIMEOUT)) {
324 		struct amdgpu_reset_context reset_context;
325 		memset(&reset_context, 0, sizeof(reset_context));
326 
327 		reset_context.method = AMD_RESET_METHOD_NONE;
328 		reset_context.reset_req_dev = adev;
329 		clear_bit(AMDGPU_NEED_FULL_RESET, &reset_context.flags);
330 		set_bit(AMDGPU_HOST_FLR, &reset_context.flags);
331 
332 		amdgpu_device_gpu_recover(adev, NULL, &reset_context);
333 	}
334 }
335 
336 static int xgpu_nv_set_mailbox_rcv_irq(struct amdgpu_device *adev,
337 				       struct amdgpu_irq_src *src,
338 				       unsigned type,
339 				       enum amdgpu_interrupt_state state)
340 {
341 	u32 tmp = RREG32_NO_KIQ(mmMAILBOX_INT_CNTL);
342 
343 	if (state == AMDGPU_IRQ_STATE_ENABLE)
344 		tmp |= 1;
345 	else
346 		tmp &= ~1;
347 
348 	WREG32_NO_KIQ(mmMAILBOX_INT_CNTL, tmp);
349 
350 	return 0;
351 }
352 
353 static int xgpu_nv_mailbox_rcv_irq(struct amdgpu_device *adev,
354 				   struct amdgpu_irq_src *source,
355 				   struct amdgpu_iv_entry *entry)
356 {
357 	enum idh_event event = xgpu_nv_mailbox_peek_msg(adev);
358 
359 	switch (event) {
360 	case IDH_FLR_NOTIFICATION:
361 		if (amdgpu_sriov_runtime(adev))
362 			WARN_ONCE(!amdgpu_reset_domain_schedule(adev->reset_domain,
363 				   &adev->virt.flr_work),
364 				  "Failed to queue work! at %s",
365 				  __func__);
366 		break;
367 		/* READY_TO_ACCESS_GPU is fetched by kernel polling, IRQ can ignore
368 		 * it byfar since that polling thread will handle it,
369 		 * other msg like flr complete is not handled here.
370 		 */
371 	case IDH_CLR_MSG_BUF:
372 	case IDH_FLR_NOTIFICATION_CMPL:
373 	case IDH_READY_TO_ACCESS_GPU:
374 	default:
375 		break;
376 	}
377 
378 	return 0;
379 }
380 
381 static const struct amdgpu_irq_src_funcs xgpu_nv_mailbox_ack_irq_funcs = {
382 	.set = xgpu_nv_set_mailbox_ack_irq,
383 	.process = xgpu_nv_mailbox_ack_irq,
384 };
385 
386 static const struct amdgpu_irq_src_funcs xgpu_nv_mailbox_rcv_irq_funcs = {
387 	.set = xgpu_nv_set_mailbox_rcv_irq,
388 	.process = xgpu_nv_mailbox_rcv_irq,
389 };
390 
391 void xgpu_nv_mailbox_set_irq_funcs(struct amdgpu_device *adev)
392 {
393 	adev->virt.ack_irq.num_types = 1;
394 	adev->virt.ack_irq.funcs = &xgpu_nv_mailbox_ack_irq_funcs;
395 	adev->virt.rcv_irq.num_types = 1;
396 	adev->virt.rcv_irq.funcs = &xgpu_nv_mailbox_rcv_irq_funcs;
397 }
398 
399 int xgpu_nv_mailbox_add_irq_id(struct amdgpu_device *adev)
400 {
401 	int r;
402 
403 	r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_BIF, 135, &adev->virt.rcv_irq);
404 	if (r)
405 		return r;
406 
407 	r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_BIF, 138, &adev->virt.ack_irq);
408 	if (r) {
409 		amdgpu_irq_put(adev, &adev->virt.rcv_irq, 0);
410 		return r;
411 	}
412 
413 	return 0;
414 }
415 
416 int xgpu_nv_mailbox_get_irq(struct amdgpu_device *adev)
417 {
418 	int r;
419 
420 	r = amdgpu_irq_get(adev, &adev->virt.rcv_irq, 0);
421 	if (r)
422 		return r;
423 	r = amdgpu_irq_get(adev, &adev->virt.ack_irq, 0);
424 	if (r) {
425 		amdgpu_irq_put(adev, &adev->virt.rcv_irq, 0);
426 		return r;
427 	}
428 
429 	INIT_WORK(&adev->virt.flr_work, xgpu_nv_mailbox_flr_work);
430 
431 	return 0;
432 }
433 
434 void xgpu_nv_mailbox_put_irq(struct amdgpu_device *adev)
435 {
436 	amdgpu_irq_put(adev, &adev->virt.ack_irq, 0);
437 	amdgpu_irq_put(adev, &adev->virt.rcv_irq, 0);
438 }
439 
440 static void xgpu_nv_ras_poison_handler(struct amdgpu_device *adev,
441 		enum amdgpu_ras_block block)
442 {
443 	if (amdgpu_ip_version(adev, UMC_HWIP, 0) < IP_VERSION(12, 0, 0)) {
444 		xgpu_nv_send_access_requests(adev, IDH_RAS_POISON);
445 	} else {
446 		amdgpu_virt_fini_data_exchange(adev);
447 		xgpu_nv_send_access_requests_with_param(adev,
448 					IDH_RAS_POISON,	block, 0, 0);
449 	}
450 }
451 
452 static bool xgpu_nv_rcvd_ras_intr(struct amdgpu_device *adev)
453 {
454 	enum idh_event msg = xgpu_nv_mailbox_peek_msg(adev);
455 
456 	return (msg == IDH_RAS_ERROR_DETECTED || msg == 0xFFFFFFFF);
457 }
458 
459 const struct amdgpu_virt_ops xgpu_nv_virt_ops = {
460 	.req_full_gpu	= xgpu_nv_request_full_gpu_access,
461 	.rel_full_gpu	= xgpu_nv_release_full_gpu_access,
462 	.req_init_data  = xgpu_nv_request_init_data,
463 	.reset_gpu = xgpu_nv_request_reset,
464 	.ready_to_reset = xgpu_nv_ready_to_reset,
465 	.wait_reset = xgpu_nv_wait_reset,
466 	.trans_msg = xgpu_nv_mailbox_trans_msg,
467 	.ras_poison_handler = xgpu_nv_ras_poison_handler,
468 	.rcvd_ras_intr = xgpu_nv_rcvd_ras_intr,
469 };
470