Merge branch 'drm-intel-next-queued' into gvt-next
[sfrench/cifs-2.6.git] / drivers / gpu / drm / i915 / intel_guc_fw.c
1 /*
2  * Copyright © 2014 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  * Authors:
24  *    Vinit Azad <vinit.azad@intel.com>
25  *    Ben Widawsky <ben@bwidawsk.net>
26  *    Dave Gordon <david.s.gordon@intel.com>
27  *    Alex Dai <yu.dai@intel.com>
28  */
29
30 #include "intel_guc_fw.h"
31 #include "i915_drv.h"
32
33 #define SKL_FW_MAJOR 9
34 #define SKL_FW_MINOR 33
35
36 #define BXT_FW_MAJOR 9
37 #define BXT_FW_MINOR 29
38
39 #define KBL_FW_MAJOR 9
40 #define KBL_FW_MINOR 39
41
42 #define GUC_FW_PATH(platform, major, minor) \
43        "i915/" __stringify(platform) "_guc_ver" __stringify(major) "_" __stringify(minor) ".bin"
44
45 #define I915_SKL_GUC_UCODE GUC_FW_PATH(skl, SKL_FW_MAJOR, SKL_FW_MINOR)
46 MODULE_FIRMWARE(I915_SKL_GUC_UCODE);
47
48 #define I915_BXT_GUC_UCODE GUC_FW_PATH(bxt, BXT_FW_MAJOR, BXT_FW_MINOR)
49 MODULE_FIRMWARE(I915_BXT_GUC_UCODE);
50
51 #define I915_KBL_GUC_UCODE GUC_FW_PATH(kbl, KBL_FW_MAJOR, KBL_FW_MINOR)
52 MODULE_FIRMWARE(I915_KBL_GUC_UCODE);
53
54 static void guc_fw_select(struct intel_uc_fw *guc_fw)
55 {
56         struct intel_guc *guc = container_of(guc_fw, struct intel_guc, fw);
57         struct drm_i915_private *dev_priv = guc_to_i915(guc);
58
59         GEM_BUG_ON(guc_fw->type != INTEL_UC_FW_TYPE_GUC);
60
61         if (!HAS_GUC(dev_priv))
62                 return;
63
64         if (i915_modparams.guc_firmware_path) {
65                 guc_fw->path = i915_modparams.guc_firmware_path;
66                 guc_fw->major_ver_wanted = 0;
67                 guc_fw->minor_ver_wanted = 0;
68         } else if (IS_SKYLAKE(dev_priv)) {
69                 guc_fw->path = I915_SKL_GUC_UCODE;
70                 guc_fw->major_ver_wanted = SKL_FW_MAJOR;
71                 guc_fw->minor_ver_wanted = SKL_FW_MINOR;
72         } else if (IS_BROXTON(dev_priv)) {
73                 guc_fw->path = I915_BXT_GUC_UCODE;
74                 guc_fw->major_ver_wanted = BXT_FW_MAJOR;
75                 guc_fw->minor_ver_wanted = BXT_FW_MINOR;
76         } else if (IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv)) {
77                 guc_fw->path = I915_KBL_GUC_UCODE;
78                 guc_fw->major_ver_wanted = KBL_FW_MAJOR;
79                 guc_fw->minor_ver_wanted = KBL_FW_MINOR;
80         } else {
81                 DRM_WARN("%s: No firmware known for this platform!\n",
82                          intel_uc_fw_type_repr(guc_fw->type));
83         }
84 }
85
86 /**
87  * intel_guc_fw_init_early() - initializes GuC firmware struct
88  * @guc: intel_guc struct
89  *
90  * On platforms with GuC selects firmware for uploading
91  */
92 void intel_guc_fw_init_early(struct intel_guc *guc)
93 {
94         struct intel_uc_fw *guc_fw = &guc->fw;
95
96         intel_uc_fw_init(guc_fw, INTEL_UC_FW_TYPE_GUC);
97         guc_fw_select(guc_fw);
98 }
99
100 static void guc_prepare_xfer(struct intel_guc *guc)
101 {
102         struct drm_i915_private *dev_priv = guc_to_i915(guc);
103
104         /* Must program this register before loading the ucode with DMA */
105         I915_WRITE(GUC_SHIM_CONTROL, GUC_DISABLE_SRAM_INIT_TO_ZEROES |
106                                      GUC_ENABLE_READ_CACHE_LOGIC |
107                                      GUC_ENABLE_MIA_CACHING |
108                                      GUC_ENABLE_READ_CACHE_FOR_SRAM_DATA |
109                                      GUC_ENABLE_READ_CACHE_FOR_WOPCM_DATA |
110                                      GUC_ENABLE_MIA_CLOCK_GATING);
111
112         if (IS_GEN9_LP(dev_priv))
113                 I915_WRITE(GEN9LP_GT_PM_CONFIG, GT_DOORBELL_ENABLE);
114         else
115                 I915_WRITE(GEN9_GT_PM_CONFIG, GT_DOORBELL_ENABLE);
116
117         if (IS_GEN9(dev_priv)) {
118                 /* DOP Clock Gating Enable for GuC clocks */
119                 I915_WRITE(GEN7_MISCCPCTL, (GEN8_DOP_CLOCK_GATE_GUC_ENABLE |
120                                             I915_READ(GEN7_MISCCPCTL)));
121
122                 /* allows for 5us (in 10ns units) before GT can go to RC6 */
123                 I915_WRITE(GUC_ARAT_C6DIS, 0x1FF);
124         }
125 }
126
127 /* Copy RSA signature from the fw image to HW for verification */
128 static int guc_xfer_rsa(struct intel_guc *guc, struct i915_vma *vma)
129 {
130         struct drm_i915_private *dev_priv = guc_to_i915(guc);
131         struct intel_uc_fw *guc_fw = &guc->fw;
132         struct sg_table *sg = vma->pages;
133         u32 rsa[UOS_RSA_SCRATCH_COUNT];
134         int i;
135
136         if (sg_pcopy_to_buffer(sg->sgl, sg->nents, rsa, sizeof(rsa),
137                                guc_fw->rsa_offset) != sizeof(rsa))
138                 return -EINVAL;
139
140         for (i = 0; i < UOS_RSA_SCRATCH_COUNT; i++)
141                 I915_WRITE(UOS_RSA_SCRATCH(i), rsa[i]);
142
143         return 0;
144 }
145
146 /*
147  * Transfer the firmware image to RAM for execution by the microcontroller.
148  *
149  * Architecturally, the DMA engine is bidirectional, and can potentially even
150  * transfer between GTT locations. This functionality is left out of the API
151  * for now as there is no need for it.
152  */
153 static int guc_xfer_ucode(struct intel_guc *guc, struct i915_vma *vma)
154 {
155         struct drm_i915_private *dev_priv = guc_to_i915(guc);
156         struct intel_uc_fw *guc_fw = &guc->fw;
157         unsigned long offset;
158         u32 status;
159         int ret;
160
161         /*
162          * The header plus uCode will be copied to WOPCM via DMA, excluding any
163          * other components
164          */
165         I915_WRITE(DMA_COPY_SIZE, guc_fw->header_size + guc_fw->ucode_size);
166
167         /* Set the source address for the new blob */
168         offset = intel_guc_ggtt_offset(guc, vma) + guc_fw->header_offset;
169         I915_WRITE(DMA_ADDR_0_LOW, lower_32_bits(offset));
170         I915_WRITE(DMA_ADDR_0_HIGH, upper_32_bits(offset) & 0xFFFF);
171
172         /*
173          * Set the DMA destination. Current uCode expects the code to be
174          * loaded at 8k; locations below this are used for the stack.
175          */
176         I915_WRITE(DMA_ADDR_1_LOW, 0x2000);
177         I915_WRITE(DMA_ADDR_1_HIGH, DMA_ADDRESS_SPACE_WOPCM);
178
179         /* Finally start the DMA */
180         I915_WRITE(DMA_CTRL, _MASKED_BIT_ENABLE(UOS_MOVE | START_DMA));
181
182         /* Wait for DMA to finish */
183         ret = __intel_wait_for_register_fw(dev_priv, DMA_CTRL, START_DMA, 0,
184                                            2, 100, &status);
185         DRM_DEBUG_DRIVER("GuC DMA status %#x\n", status);
186
187         return ret;
188 }
189
190 /*
191  * Read the GuC status register (GUC_STATUS) and store it in the
192  * specified location; then return a boolean indicating whether
193  * the value matches either of two values representing completion
194  * of the GuC boot process.
195  *
196  * This is used for polling the GuC status in a wait_for()
197  * loop below.
198  */
199 static inline bool guc_ready(struct intel_guc *guc, u32 *status)
200 {
201         struct drm_i915_private *dev_priv = guc_to_i915(guc);
202         u32 val = I915_READ(GUC_STATUS);
203         u32 uk_val = val & GS_UKERNEL_MASK;
204
205         *status = val;
206         return (uk_val == GS_UKERNEL_READY) ||
207                 ((val & GS_MIA_CORE_STATE) && (uk_val == GS_UKERNEL_LAPIC_DONE));
208 }
209
210 static int guc_wait_ucode(struct intel_guc *guc)
211 {
212         u32 status;
213         int ret;
214
215         /*
216          * Wait for the GuC to start up.
217          * NB: Docs recommend not using the interrupt for completion.
218          * Measurements indicate this should take no more than 20ms, so a
219          * timeout here indicates that the GuC has failed and is unusable.
220          * (Higher levels of the driver will attempt to fall back to
221          * execlist mode if this happens.)
222          */
223         ret = wait_for(guc_ready(guc, &status), 100);
224         DRM_DEBUG_DRIVER("GuC status %#x\n", status);
225
226         if ((status & GS_BOOTROM_MASK) == GS_BOOTROM_RSA_FAILED) {
227                 DRM_ERROR("GuC firmware signature verification failed\n");
228                 ret = -ENOEXEC;
229         }
230
231         return ret;
232 }
233
234 /*
235  * Load the GuC firmware blob into the MinuteIA.
236  */
237 static int guc_fw_xfer(struct intel_uc_fw *guc_fw, struct i915_vma *vma)
238 {
239         struct intel_guc *guc = container_of(guc_fw, struct intel_guc, fw);
240         struct drm_i915_private *dev_priv = guc_to_i915(guc);
241         int ret;
242
243         GEM_BUG_ON(guc_fw->type != INTEL_UC_FW_TYPE_GUC);
244
245         intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
246
247         guc_prepare_xfer(guc);
248
249         /*
250          * Note that GuC needs the CSS header plus uKernel code to be copied
251          * by the DMA engine in one operation, whereas the RSA signature is
252          * loaded via MMIO.
253          */
254         ret = guc_xfer_rsa(guc, vma);
255         if (ret)
256                 DRM_WARN("GuC firmware signature xfer error %d\n", ret);
257
258         ret = guc_xfer_ucode(guc, vma);
259         if (ret)
260                 DRM_WARN("GuC firmware code xfer error %d\n", ret);
261
262         ret = guc_wait_ucode(guc);
263         if (ret)
264                 DRM_ERROR("GuC firmware xfer error %d\n", ret);
265
266         intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
267
268         return ret;
269 }
270
271 /**
272  * intel_guc_fw_upload() - load GuC uCode to device
273  * @guc: intel_guc structure
274  *
275  * Called from intel_uc_init_hw() during driver load, resume from sleep and
276  * after a GPU reset.
277  *
278  * The firmware image should have already been fetched into memory, so only
279  * check that fetch succeeded, and then transfer the image to the h/w.
280  *
281  * Return:      non-zero code on error
282  */
283 int intel_guc_fw_upload(struct intel_guc *guc)
284 {
285         return intel_uc_fw_upload(&guc->fw, guc_fw_xfer);
286 }