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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
34static void xgpu_nv_mailbox_send_ack(struct amdgpu_device *adev)
35{
36 WREG8(NV_MAIBOX_CONTROL_RCV_OFFSET_BYTE, 2);
37}
38
39static void xgpu_nv_mailbox_set_valid(struct amdgpu_device *adev, bool val)
40{
41 WREG8(NV_MAIBOX_CONTROL_TRN_OFFSET_BYTE, val ? 1 : 0);
42}
43
44/*
45 * this peek_msg could *only* be called in IRQ routine becuase in IRQ routine
46 * RCV_MSG_VALID filed of BIF_BX_PF_MAILBOX_CONTROL must already be set to 1
47 * by host.
48 *
49 * if called no in IRQ routine, this peek_msg cannot guaranteed to return the
50 * correct value since it doesn't return the RCV_DW0 under the case that
51 * RCV_MSG_VALID is set by host.
52 */
53static enum idh_event xgpu_nv_mailbox_peek_msg(struct amdgpu_device *adev)
54{
55 return RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW0);
56}
57
58
59static int xgpu_nv_mailbox_rcv_msg(struct amdgpu_device *adev,
60 enum idh_event event)
61{
62 u32 reg;
63
64 reg = RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW0);
65 if (reg != event)
66 return -ENOENT;
67
68 xgpu_nv_mailbox_send_ack(adev);
69
70 return 0;
71}
72
73static uint8_t xgpu_nv_peek_ack(struct amdgpu_device *adev)
74{
75 return RREG8(NV_MAIBOX_CONTROL_TRN_OFFSET_BYTE) & 2;
76}
77
78static int xgpu_nv_poll_ack(struct amdgpu_device *adev)
79{
80 int timeout = NV_MAILBOX_POLL_ACK_TIMEDOUT;
81 u8 reg;
82
83 do {
84 reg = RREG8(NV_MAIBOX_CONTROL_TRN_OFFSET_BYTE);
85 if (reg & 2)
86 return 0;
87
88 mdelay(5);
89 timeout -= 5;
90 } while (timeout > 1);
91
92 pr_err("Doesn't get TRN_MSG_ACK from pf in %d msec\n", NV_MAILBOX_POLL_ACK_TIMEDOUT);
93
94 return -ETIME;
95}
96
97static int xgpu_nv_poll_msg(struct amdgpu_device *adev, enum idh_event event)
98{
99 int r, timeout = NV_MAILBOX_POLL_MSG_TIMEDOUT;
100
101 do {
102 r = xgpu_nv_mailbox_rcv_msg(adev, event);
103 if (!r)
104 return 0;
105
106 msleep(10);
107 timeout -= 10;
108 } while (timeout > 1);
109
110
111 return -ETIME;
112}
113
114static void xgpu_nv_mailbox_trans_msg (struct amdgpu_device *adev,
115 enum idh_request req, u32 data1, u32 data2, u32 data3)
116{
117 int r;
118 uint8_t trn;
119
120 /* IMPORTANT:
121 * clear TRN_MSG_VALID valid to clear host's RCV_MSG_ACK
122 * and with host's RCV_MSG_ACK cleared hw automatically clear host's RCV_MSG_ACK
123 * which lead to VF's TRN_MSG_ACK cleared, otherwise below xgpu_nv_poll_ack()
124 * will return immediatly
125 */
126 do {
127 xgpu_nv_mailbox_set_valid(adev, false);
128 trn = xgpu_nv_peek_ack(adev);
129 if (trn) {
130 pr_err("trn=%x ACK should not assert! wait again !\n", trn);
131 msleep(1);
132 }
133 } while (trn);
134
135 WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW0, req);
136 WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW1, data1);
137 WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW2, data2);
138 WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW3, data3);
139 xgpu_nv_mailbox_set_valid(adev, true);
140
141 /* start to poll ack */
142 r = xgpu_nv_poll_ack(adev);
143 if (r)
144 pr_err("Doesn't get ack from pf, continue\n");
145
146 xgpu_nv_mailbox_set_valid(adev, false);
147}
148
149static int xgpu_nv_send_access_requests(struct amdgpu_device *adev,
150 enum idh_request req)
151{
152 int r;
153 enum idh_event event = -1;
154
155 xgpu_nv_mailbox_trans_msg(adev, req, 0, 0, 0);
156
157 switch (req) {
158 case IDH_REQ_GPU_INIT_ACCESS:
159 case IDH_REQ_GPU_FINI_ACCESS:
160 case IDH_REQ_GPU_RESET_ACCESS:
161 event = IDH_READY_TO_ACCESS_GPU;
162 break;
163 case IDH_REQ_GPU_INIT_DATA:
164 event = IDH_REQ_GPU_INIT_DATA_READY;
165 break;
166 default:
167 break;
168 }
169
170 if (event != -1) {
171 r = xgpu_nv_poll_msg(adev, event);
172 if (r) {
173 if (req != IDH_REQ_GPU_INIT_DATA) {
174 pr_err("Doesn't get msg:%d from pf, error=%d\n", event, r);
175 return r;
176 }
177 else /* host doesn't support REQ_GPU_INIT_DATA handshake */
178 adev->virt.req_init_data_ver = 0;
179 } else {
180 if (req == IDH_REQ_GPU_INIT_DATA)
181 {
182 adev->virt.req_init_data_ver =
183 RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW1);
184
185 /* assume V1 in case host doesn't set version number */
186 if (adev->virt.req_init_data_ver < 1)
187 adev->virt.req_init_data_ver = 1;
188 }
189 }
190
191 /* Retrieve checksum from mailbox2 */
192 if (req == IDH_REQ_GPU_INIT_ACCESS || req == IDH_REQ_GPU_RESET_ACCESS) {
193 adev->virt.fw_reserve.checksum_key =
194 RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW2);
195 }
196 }
197
198 return 0;
199}
200
201static int xgpu_nv_request_reset(struct amdgpu_device *adev)
202{
203 int ret, i = 0;
204
205 while (i < NV_MAILBOX_POLL_MSG_REP_MAX) {
206 ret = xgpu_nv_send_access_requests(adev, IDH_REQ_GPU_RESET_ACCESS);
207 if (!ret)
208 break;
209 i++;
210 }
211
212 return ret;
213}
214
215static int xgpu_nv_request_full_gpu_access(struct amdgpu_device *adev,
216 bool init)
217{
218 enum idh_request req;
219
220 req = init ? IDH_REQ_GPU_INIT_ACCESS : IDH_REQ_GPU_FINI_ACCESS;
221 return xgpu_nv_send_access_requests(adev, req);
222}
223
224static int xgpu_nv_release_full_gpu_access(struct amdgpu_device *adev,
225 bool init)
226{
227 enum idh_request req;
228 int r = 0;
229
230 req = init ? IDH_REL_GPU_INIT_ACCESS : IDH_REL_GPU_FINI_ACCESS;
231 r = xgpu_nv_send_access_requests(adev, req);
232
233 return r;
234}
235
236static int xgpu_nv_request_init_data(struct amdgpu_device *adev)
237{
238 return xgpu_nv_send_access_requests(adev, IDH_REQ_GPU_INIT_DATA);
239}
240
241static int xgpu_nv_mailbox_ack_irq(struct amdgpu_device *adev,
242 struct amdgpu_irq_src *source,
243 struct amdgpu_iv_entry *entry)
244{
245 DRM_DEBUG("get ack intr and do nothing.\n");
246 return 0;
247}
248
249static int xgpu_nv_set_mailbox_ack_irq(struct amdgpu_device *adev,
250 struct amdgpu_irq_src *source,
251 unsigned type,
252 enum amdgpu_interrupt_state state)
253{
254 u32 tmp = RREG32_NO_KIQ(mmMAILBOX_INT_CNTL);
255
256 if (state == AMDGPU_IRQ_STATE_ENABLE)
257 tmp |= 2;
258 else
259 tmp &= ~2;
260
261 WREG32_NO_KIQ(mmMAILBOX_INT_CNTL, tmp);
262
263 return 0;
264}
265
266static void xgpu_nv_mailbox_flr_work(struct work_struct *work)
267{
268 struct amdgpu_virt *virt = container_of(work, struct amdgpu_virt, flr_work);
269 struct amdgpu_device *adev = container_of(virt, struct amdgpu_device, virt);
270 int timeout = NV_MAILBOX_POLL_FLR_TIMEDOUT;
271
272 /* block amdgpu_gpu_recover till msg FLR COMPLETE received,
273 * otherwise the mailbox msg will be ruined/reseted by
274 * the VF FLR.
275 */
276 if (!down_write_trylock(&adev->reset_sem))
277 return;
278
279 amdgpu_virt_fini_data_exchange(adev);
280 atomic_set(&adev->in_gpu_reset, 1);
281
282 do {
283 if (xgpu_nv_mailbox_peek_msg(adev) == IDH_FLR_NOTIFICATION_CMPL)
284 goto flr_done;
285
286 msleep(10);
287 timeout -= 10;
288 } while (timeout > 1);
289
290flr_done:
291 atomic_set(&adev->in_gpu_reset, 0);
292 up_write(&adev->reset_sem);
293
294 /* Trigger recovery for world switch failure if no TDR */
295 if (amdgpu_device_should_recover_gpu(adev)
296 && (!amdgpu_device_has_job_running(adev) ||
297 adev->sdma_timeout == MAX_SCHEDULE_TIMEOUT ||
298 adev->gfx_timeout == MAX_SCHEDULE_TIMEOUT ||
299 adev->compute_timeout == MAX_SCHEDULE_TIMEOUT ||
300 adev->video_timeout == MAX_SCHEDULE_TIMEOUT))
301 amdgpu_device_gpu_recover(adev, NULL);
302}
303
304static int xgpu_nv_set_mailbox_rcv_irq(struct amdgpu_device *adev,
305 struct amdgpu_irq_src *src,
306 unsigned type,
307 enum amdgpu_interrupt_state state)
308{
309 u32 tmp = RREG32_NO_KIQ(mmMAILBOX_INT_CNTL);
310
311 if (state == AMDGPU_IRQ_STATE_ENABLE)
312 tmp |= 1;
313 else
314 tmp &= ~1;
315
316 WREG32_NO_KIQ(mmMAILBOX_INT_CNTL, tmp);
317
318 return 0;
319}
320
321static int xgpu_nv_mailbox_rcv_irq(struct amdgpu_device *adev,
322 struct amdgpu_irq_src *source,
323 struct amdgpu_iv_entry *entry)
324{
325 enum idh_event event = xgpu_nv_mailbox_peek_msg(adev);
326
327 switch (event) {
328 case IDH_FLR_NOTIFICATION:
329 if (amdgpu_sriov_runtime(adev))
330 schedule_work(&adev->virt.flr_work);
331 break;
332 /* READY_TO_ACCESS_GPU is fetched by kernel polling, IRQ can ignore
333 * it byfar since that polling thread will handle it,
334 * other msg like flr complete is not handled here.
335 */
336 case IDH_CLR_MSG_BUF:
337 case IDH_FLR_NOTIFICATION_CMPL:
338 case IDH_READY_TO_ACCESS_GPU:
339 default:
340 break;
341 }
342
343 return 0;
344}
345
346static const struct amdgpu_irq_src_funcs xgpu_nv_mailbox_ack_irq_funcs = {
347 .set = xgpu_nv_set_mailbox_ack_irq,
348 .process = xgpu_nv_mailbox_ack_irq,
349};
350
351static const struct amdgpu_irq_src_funcs xgpu_nv_mailbox_rcv_irq_funcs = {
352 .set = xgpu_nv_set_mailbox_rcv_irq,
353 .process = xgpu_nv_mailbox_rcv_irq,
354};
355
356void xgpu_nv_mailbox_set_irq_funcs(struct amdgpu_device *adev)
357{
358 adev->virt.ack_irq.num_types = 1;
359 adev->virt.ack_irq.funcs = &xgpu_nv_mailbox_ack_irq_funcs;
360 adev->virt.rcv_irq.num_types = 1;
361 adev->virt.rcv_irq.funcs = &xgpu_nv_mailbox_rcv_irq_funcs;
362}
363
364int xgpu_nv_mailbox_add_irq_id(struct amdgpu_device *adev)
365{
366 int r;
367
368 r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_BIF, 135, &adev->virt.rcv_irq);
369 if (r)
370 return r;
371
372 r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_BIF, 138, &adev->virt.ack_irq);
373 if (r) {
374 amdgpu_irq_put(adev, &adev->virt.rcv_irq, 0);
375 return r;
376 }
377
378 return 0;
379}
380
381int xgpu_nv_mailbox_get_irq(struct amdgpu_device *adev)
382{
383 int r;
384
385 r = amdgpu_irq_get(adev, &adev->virt.rcv_irq, 0);
386 if (r)
387 return r;
388 r = amdgpu_irq_get(adev, &adev->virt.ack_irq, 0);
389 if (r) {
390 amdgpu_irq_put(adev, &adev->virt.rcv_irq, 0);
391 return r;
392 }
393
394 INIT_WORK(&adev->virt.flr_work, xgpu_nv_mailbox_flr_work);
395
396 return 0;
397}
398
399void xgpu_nv_mailbox_put_irq(struct amdgpu_device *adev)
400{
401 amdgpu_irq_put(adev, &adev->virt.ack_irq, 0);
402 amdgpu_irq_put(adev, &adev->virt.rcv_irq, 0);
403}
404
405const struct amdgpu_virt_ops xgpu_nv_virt_ops = {
406 .req_full_gpu = xgpu_nv_request_full_gpu_access,
407 .rel_full_gpu = xgpu_nv_release_full_gpu_access,
408 .req_init_data = xgpu_nv_request_init_data,
409 .reset_gpu = xgpu_nv_request_reset,
410 .wait_reset = NULL,
411 .trans_msg = xgpu_nv_mailbox_trans_msg,
412};