1 /*
2 * Copyright © 2016 Intel Corporation
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 (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 *
23 */
24
25 #include "intel_uc.h"
26 #include "i915_drv.h"
27 #include "i915_guc_submission.h"
28
29 /* Reset GuC providing us with fresh state for both GuC and HuC.
30 */
__intel_uc_reset_hw(struct drm_i915_private * dev_priv)31 static int __intel_uc_reset_hw(struct drm_i915_private *dev_priv)
32 {
33 int ret;
34 u32 guc_status;
35
36 ret = intel_guc_reset(dev_priv);
37 if (ret) {
38 DRM_ERROR("GuC reset failed, ret = %d\n", ret);
39 return ret;
40 }
41
42 guc_status = I915_READ(GUC_STATUS);
43 WARN(!(guc_status & GS_MIA_IN_RESET),
44 "GuC status: 0x%x, MIA core expected to be in reset\n",
45 guc_status);
46
47 return ret;
48 }
49
intel_uc_sanitize_options(struct drm_i915_private * dev_priv)50 void intel_uc_sanitize_options(struct drm_i915_private *dev_priv)
51 {
52 if (!HAS_GUC(dev_priv)) {
53 if (i915_modparams.enable_guc_loading > 0 ||
54 i915_modparams.enable_guc_submission > 0)
55 DRM_INFO("Ignoring GuC options, no hardware\n");
56
57 i915_modparams.enable_guc_loading = 0;
58 i915_modparams.enable_guc_submission = 0;
59 return;
60 }
61
62 /* A negative value means "use platform default" */
63 if (i915_modparams.enable_guc_loading < 0)
64 i915_modparams.enable_guc_loading = HAS_GUC_UCODE(dev_priv);
65
66 /* Verify firmware version */
67 if (i915_modparams.enable_guc_loading) {
68 if (HAS_HUC_UCODE(dev_priv))
69 intel_huc_select_fw(&dev_priv->huc);
70
71 if (intel_guc_fw_select(&dev_priv->guc))
72 i915_modparams.enable_guc_loading = 0;
73 }
74
75 /* Can't enable guc submission without guc loaded */
76 if (!i915_modparams.enable_guc_loading)
77 i915_modparams.enable_guc_submission = 0;
78
79 /* A negative value means "use platform default" */
80 if (i915_modparams.enable_guc_submission < 0)
81 i915_modparams.enable_guc_submission = HAS_GUC_SCHED(dev_priv);
82 }
83
intel_uc_init_early(struct drm_i915_private * dev_priv)84 void intel_uc_init_early(struct drm_i915_private *dev_priv)
85 {
86 intel_guc_init_early(&dev_priv->guc);
87 }
88
intel_uc_init_fw(struct drm_i915_private * dev_priv)89 void intel_uc_init_fw(struct drm_i915_private *dev_priv)
90 {
91 intel_uc_fw_fetch(dev_priv, &dev_priv->huc.fw);
92 intel_uc_fw_fetch(dev_priv, &dev_priv->guc.fw);
93 }
94
intel_uc_fini_fw(struct drm_i915_private * dev_priv)95 void intel_uc_fini_fw(struct drm_i915_private *dev_priv)
96 {
97 intel_uc_fw_fini(&dev_priv->guc.fw);
98 intel_uc_fw_fini(&dev_priv->huc.fw);
99 }
100
101 /**
102 * intel_uc_init_mmio - setup uC MMIO access
103 *
104 * @dev_priv: device private
105 *
106 * Setup minimal state necessary for MMIO accesses later in the
107 * initialization sequence.
108 */
intel_uc_init_mmio(struct drm_i915_private * dev_priv)109 void intel_uc_init_mmio(struct drm_i915_private *dev_priv)
110 {
111 intel_guc_init_send_regs(&dev_priv->guc);
112 }
113
guc_capture_load_err_log(struct intel_guc * guc)114 static void guc_capture_load_err_log(struct intel_guc *guc)
115 {
116 if (!guc->log.vma || i915_modparams.guc_log_level < 0)
117 return;
118
119 if (!guc->load_err_log)
120 guc->load_err_log = i915_gem_object_get(guc->log.vma->obj);
121
122 return;
123 }
124
guc_free_load_err_log(struct intel_guc * guc)125 static void guc_free_load_err_log(struct intel_guc *guc)
126 {
127 if (guc->load_err_log)
128 i915_gem_object_put(guc->load_err_log);
129 }
130
guc_enable_communication(struct intel_guc * guc)131 static int guc_enable_communication(struct intel_guc *guc)
132 {
133 struct drm_i915_private *dev_priv = guc_to_i915(guc);
134
135 if (HAS_GUC_CT(dev_priv))
136 return intel_guc_enable_ct(guc);
137
138 guc->send = intel_guc_send_mmio;
139 return 0;
140 }
141
guc_disable_communication(struct intel_guc * guc)142 static void guc_disable_communication(struct intel_guc *guc)
143 {
144 struct drm_i915_private *dev_priv = guc_to_i915(guc);
145
146 if (HAS_GUC_CT(dev_priv))
147 intel_guc_disable_ct(guc);
148
149 guc->send = intel_guc_send_nop;
150 }
151
intel_uc_init_hw(struct drm_i915_private * dev_priv)152 int intel_uc_init_hw(struct drm_i915_private *dev_priv)
153 {
154 struct intel_guc *guc = &dev_priv->guc;
155 int ret, attempts;
156
157 if (!i915_modparams.enable_guc_loading)
158 return 0;
159
160 guc_disable_communication(guc);
161 gen9_reset_guc_interrupts(dev_priv);
162
163 /* We need to notify the guc whenever we change the GGTT */
164 i915_ggtt_enable_guc(dev_priv);
165
166 if (i915_modparams.enable_guc_submission) {
167 /*
168 * This is stuff we need to have available at fw load time
169 * if we are planning to enable submission later
170 */
171 ret = i915_guc_submission_init(dev_priv);
172 if (ret)
173 goto err_guc;
174 }
175
176 /* init WOPCM */
177 I915_WRITE(GUC_WOPCM_SIZE, intel_guc_wopcm_size(dev_priv));
178 I915_WRITE(DMA_GUC_WOPCM_OFFSET,
179 GUC_WOPCM_OFFSET_VALUE | HUC_LOADING_AGENT_GUC);
180
181 /* WaEnableuKernelHeaderValidFix:skl */
182 /* WaEnableGuCBootHashCheckNotSet:skl,bxt,kbl */
183 if (IS_GEN9(dev_priv))
184 attempts = 3;
185 else
186 attempts = 1;
187
188 while (attempts--) {
189 /*
190 * Always reset the GuC just before (re)loading, so
191 * that the state and timing are fairly predictable
192 */
193 ret = __intel_uc_reset_hw(dev_priv);
194 if (ret)
195 goto err_submission;
196
197 intel_huc_init_hw(&dev_priv->huc);
198 intel_guc_init_params(guc);
199 ret = intel_guc_fw_upload(guc);
200 if (ret == 0 || ret != -EAGAIN)
201 break;
202
203 DRM_DEBUG_DRIVER("GuC fw load failed: %d; will reset and "
204 "retry %d more time(s)\n", ret, attempts);
205 }
206
207 /* Did we succeded or run out of retries? */
208 if (ret)
209 goto err_log_capture;
210
211 ret = guc_enable_communication(guc);
212 if (ret)
213 goto err_log_capture;
214
215 intel_huc_auth(&dev_priv->huc);
216 if (i915_modparams.enable_guc_submission) {
217 if (i915_modparams.guc_log_level >= 0)
218 gen9_enable_guc_interrupts(dev_priv);
219
220 ret = i915_guc_submission_enable(dev_priv);
221 if (ret)
222 goto err_interrupts;
223 }
224
225 dev_info(dev_priv->drm.dev, "GuC %s (firmware %s [version %u.%u])\n",
226 i915_modparams.enable_guc_submission ? "submission enabled" :
227 "loaded",
228 guc->fw.path,
229 guc->fw.major_ver_found, guc->fw.minor_ver_found);
230
231 return 0;
232
233 /*
234 * We've failed to load the firmware :(
235 *
236 * Decide whether to disable GuC submission and fall back to
237 * execlist mode, and whether to hide the error by returning
238 * zero or to return -EIO, which the caller will treat as a
239 * nonfatal error (i.e. it doesn't prevent driver load, but
240 * marks the GPU as wedged until reset).
241 */
242 err_interrupts:
243 guc_disable_communication(guc);
244 gen9_disable_guc_interrupts(dev_priv);
245 err_log_capture:
246 guc_capture_load_err_log(guc);
247 err_submission:
248 if (i915_modparams.enable_guc_submission)
249 i915_guc_submission_fini(dev_priv);
250 err_guc:
251 i915_ggtt_disable_guc(dev_priv);
252
253 if (i915_modparams.enable_guc_loading > 1 ||
254 i915_modparams.enable_guc_submission > 1) {
255 DRM_ERROR("GuC init failed. Firmware loading disabled.\n");
256 ret = -EIO;
257 } else {
258 DRM_NOTE("GuC init failed. Firmware loading disabled.\n");
259 ret = 0;
260 }
261
262 if (i915_modparams.enable_guc_submission) {
263 i915_modparams.enable_guc_submission = 0;
264 DRM_NOTE("Falling back from GuC submission to execlist mode\n");
265 }
266
267 i915_modparams.enable_guc_loading = 0;
268
269 return ret;
270 }
271
intel_uc_fini_hw(struct drm_i915_private * dev_priv)272 void intel_uc_fini_hw(struct drm_i915_private *dev_priv)
273 {
274 guc_free_load_err_log(&dev_priv->guc);
275
276 if (!i915_modparams.enable_guc_loading)
277 return;
278
279 if (i915_modparams.enable_guc_submission)
280 i915_guc_submission_disable(dev_priv);
281
282 guc_disable_communication(&dev_priv->guc);
283
284 if (i915_modparams.enable_guc_submission) {
285 gen9_disable_guc_interrupts(dev_priv);
286 i915_guc_submission_fini(dev_priv);
287 }
288
289 i915_ggtt_disable_guc(dev_priv);
290 }
291