]> Git Repo - linux.git/blob - drivers/gpu/drm/i915/intel_huc.c
Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[linux.git] / drivers / gpu / drm / i915 / intel_huc.c
1 /*
2  * Copyright © 2016-2017 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 <linux/types.h>
26
27 #include "intel_huc.h"
28 #include "i915_drv.h"
29
30 /**
31  * DOC: HuC Firmware
32  *
33  * Motivation:
34  * GEN9 introduces a new dedicated firmware for usage in media HEVC (High
35  * Efficiency Video Coding) operations. Userspace can use the firmware
36  * capabilities by adding HuC specific commands to batch buffers.
37  *
38  * Implementation:
39  * The same firmware loader is used as the GuC. However, the actual
40  * loading to HW is deferred until GEM initialization is done.
41  *
42  * Note that HuC firmware loading must be done before GuC loading.
43  */
44
45 #define BXT_HUC_FW_MAJOR 01
46 #define BXT_HUC_FW_MINOR 07
47 #define BXT_BLD_NUM 1398
48
49 #define SKL_HUC_FW_MAJOR 01
50 #define SKL_HUC_FW_MINOR 07
51 #define SKL_BLD_NUM 1398
52
53 #define KBL_HUC_FW_MAJOR 02
54 #define KBL_HUC_FW_MINOR 00
55 #define KBL_BLD_NUM 1810
56
57 #define GLK_HUC_FW_MAJOR 02
58 #define GLK_HUC_FW_MINOR 00
59 #define GLK_BLD_NUM 1748
60
61 #define HUC_FW_PATH(platform, major, minor, bld_num) \
62         "i915/" __stringify(platform) "_huc_ver" __stringify(major) "_" \
63         __stringify(minor) "_" __stringify(bld_num) ".bin"
64
65 #define I915_SKL_HUC_UCODE HUC_FW_PATH(skl, SKL_HUC_FW_MAJOR, \
66         SKL_HUC_FW_MINOR, SKL_BLD_NUM)
67 MODULE_FIRMWARE(I915_SKL_HUC_UCODE);
68
69 #define I915_BXT_HUC_UCODE HUC_FW_PATH(bxt, BXT_HUC_FW_MAJOR, \
70         BXT_HUC_FW_MINOR, BXT_BLD_NUM)
71 MODULE_FIRMWARE(I915_BXT_HUC_UCODE);
72
73 #define I915_KBL_HUC_UCODE HUC_FW_PATH(kbl, KBL_HUC_FW_MAJOR, \
74         KBL_HUC_FW_MINOR, KBL_BLD_NUM)
75 MODULE_FIRMWARE(I915_KBL_HUC_UCODE);
76
77 #define I915_GLK_HUC_UCODE HUC_FW_PATH(glk, GLK_HUC_FW_MAJOR, \
78         GLK_HUC_FW_MINOR, GLK_BLD_NUM)
79
80 static void huc_fw_select(struct intel_uc_fw *huc_fw)
81 {
82         struct intel_huc *huc = container_of(huc_fw, struct intel_huc, fw);
83         struct drm_i915_private *dev_priv = huc_to_i915(huc);
84
85         GEM_BUG_ON(huc_fw->type != INTEL_UC_FW_TYPE_HUC);
86
87         if (!HAS_HUC(dev_priv))
88                 return;
89
90         if (i915_modparams.huc_firmware_path) {
91                 huc_fw->path = i915_modparams.huc_firmware_path;
92                 huc_fw->major_ver_wanted = 0;
93                 huc_fw->minor_ver_wanted = 0;
94         } else if (IS_SKYLAKE(dev_priv)) {
95                 huc_fw->path = I915_SKL_HUC_UCODE;
96                 huc_fw->major_ver_wanted = SKL_HUC_FW_MAJOR;
97                 huc_fw->minor_ver_wanted = SKL_HUC_FW_MINOR;
98         } else if (IS_BROXTON(dev_priv)) {
99                 huc_fw->path = I915_BXT_HUC_UCODE;
100                 huc_fw->major_ver_wanted = BXT_HUC_FW_MAJOR;
101                 huc_fw->minor_ver_wanted = BXT_HUC_FW_MINOR;
102         } else if (IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv)) {
103                 huc_fw->path = I915_KBL_HUC_UCODE;
104                 huc_fw->major_ver_wanted = KBL_HUC_FW_MAJOR;
105                 huc_fw->minor_ver_wanted = KBL_HUC_FW_MINOR;
106         } else if (IS_GEMINILAKE(dev_priv)) {
107                 huc_fw->path = I915_GLK_HUC_UCODE;
108                 huc_fw->major_ver_wanted = GLK_HUC_FW_MAJOR;
109                 huc_fw->minor_ver_wanted = GLK_HUC_FW_MINOR;
110         } else {
111                 DRM_WARN("%s: No firmware known for this platform!\n",
112                          intel_uc_fw_type_repr(huc_fw->type));
113         }
114 }
115
116 /**
117  * intel_huc_init_early() - initializes HuC struct
118  * @huc: intel_huc struct
119  *
120  * On platforms with HuC selects firmware for uploading
121  */
122 void intel_huc_init_early(struct intel_huc *huc)
123 {
124         struct intel_uc_fw *huc_fw = &huc->fw;
125
126         intel_uc_fw_init(huc_fw, INTEL_UC_FW_TYPE_HUC);
127         huc_fw_select(huc_fw);
128 }
129
130 /**
131  * huc_ucode_xfer() - DMA's the firmware
132  * @dev_priv: the drm_i915_private device
133  *
134  * Transfer the firmware image to RAM for execution by the microcontroller.
135  *
136  * Return: 0 on success, non-zero on failure
137  */
138 static int huc_ucode_xfer(struct intel_uc_fw *huc_fw, struct i915_vma *vma)
139 {
140         struct intel_huc *huc = container_of(huc_fw, struct intel_huc, fw);
141         struct drm_i915_private *dev_priv = huc_to_i915(huc);
142         unsigned long offset = 0;
143         u32 size;
144         int ret;
145
146         GEM_BUG_ON(huc_fw->type != INTEL_UC_FW_TYPE_HUC);
147
148         intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
149
150         /* Set the source address for the uCode */
151         offset = guc_ggtt_offset(vma) + huc_fw->header_offset;
152         I915_WRITE(DMA_ADDR_0_LOW, lower_32_bits(offset));
153         I915_WRITE(DMA_ADDR_0_HIGH, upper_32_bits(offset) & 0xFFFF);
154
155         /* Hardware doesn't look at destination address for HuC. Set it to 0,
156          * but still program the correct address space.
157          */
158         I915_WRITE(DMA_ADDR_1_LOW, 0);
159         I915_WRITE(DMA_ADDR_1_HIGH, DMA_ADDRESS_SPACE_WOPCM);
160
161         size = huc_fw->header_size + huc_fw->ucode_size;
162         I915_WRITE(DMA_COPY_SIZE, size);
163
164         /* Start the DMA */
165         I915_WRITE(DMA_CTRL, _MASKED_BIT_ENABLE(HUC_UKERNEL | START_DMA));
166
167         /* Wait for DMA to finish */
168         ret = intel_wait_for_register_fw(dev_priv, DMA_CTRL, START_DMA, 0, 100);
169
170         DRM_DEBUG_DRIVER("HuC DMA transfer wait over with ret %d\n", ret);
171
172         /* Disable the bits once DMA is over */
173         I915_WRITE(DMA_CTRL, _MASKED_BIT_DISABLE(HUC_UKERNEL));
174
175         intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
176
177         return ret;
178 }
179
180 /**
181  * intel_huc_init_hw() - load HuC uCode to device
182  * @huc: intel_huc structure
183  *
184  * Called from intel_uc_init_hw() during driver loading and also after a GPU
185  * reset. Be note that HuC loading must be done before GuC loading.
186  *
187  * The firmware image should have already been fetched into memory by the
188  * earlier call to intel_uc_init_fw(), so here we need only check that
189  * is succeeded, and then transfer the image to the h/w.
190  *
191  */
192 int intel_huc_init_hw(struct intel_huc *huc)
193 {
194         return intel_uc_fw_upload(&huc->fw, huc_ucode_xfer);
195 }
196
197 /**
198  * intel_huc_auth() - Authenticate HuC uCode
199  * @huc: intel_huc structure
200  *
201  * Called after HuC and GuC firmware loading during intel_uc_init_hw().
202  *
203  * This function pins HuC firmware image object into GGTT.
204  * Then it invokes GuC action to authenticate passing the offset to RSA
205  * signature through intel_guc_auth_huc(). It then waits for 50ms for
206  * firmware verification ACK and unpins the object.
207  */
208 int intel_huc_auth(struct intel_huc *huc)
209 {
210         struct drm_i915_private *i915 = huc_to_i915(huc);
211         struct intel_guc *guc = &i915->guc;
212         struct i915_vma *vma;
213         int ret;
214
215         if (huc->fw.load_status != INTEL_UC_FIRMWARE_SUCCESS)
216                 return -ENOEXEC;
217
218         vma = i915_gem_object_ggtt_pin(huc->fw.obj, NULL, 0, 0,
219                                 PIN_OFFSET_BIAS | GUC_WOPCM_TOP);
220         if (IS_ERR(vma)) {
221                 ret = PTR_ERR(vma);
222                 DRM_ERROR("HuC: Failed to pin huc fw object %d\n", ret);
223                 return ret;
224         }
225
226         ret = intel_guc_auth_huc(guc,
227                                  guc_ggtt_offset(vma) + huc->fw.rsa_offset);
228         if (ret) {
229                 DRM_ERROR("HuC: GuC did not ack Auth request %d\n", ret);
230                 goto out;
231         }
232
233         /* Check authentication status, it should be done by now */
234         ret = intel_wait_for_register(i915,
235                                       HUC_STATUS2,
236                                       HUC_FW_VERIFIED,
237                                       HUC_FW_VERIFIED,
238                                       50);
239         if (ret) {
240                 DRM_ERROR("HuC: Authentication failed %d\n", ret);
241                 goto out;
242         }
243
244 out:
245         i915_vma_unpin(vma);
246         return ret;
247 }
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