drm/i915: properly init lockdep class
[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 GLK_FW_MAJOR 10
43 #define GLK_FW_MINOR 56
44
45 #define GUC_FW_PATH(platform, major, minor) \
46        "i915/" __stringify(platform) "_guc_ver" __stringify(major) "_" __stringify(minor) ".bin"
47
48 #define I915_SKL_GUC_UCODE GUC_FW_PATH(skl, SKL_FW_MAJOR, SKL_FW_MINOR)
49 MODULE_FIRMWARE(I915_SKL_GUC_UCODE);
50
51 #define I915_BXT_GUC_UCODE GUC_FW_PATH(bxt, BXT_FW_MAJOR, BXT_FW_MINOR)
52 MODULE_FIRMWARE(I915_BXT_GUC_UCODE);
53
54 #define I915_KBL_GUC_UCODE GUC_FW_PATH(kbl, KBL_FW_MAJOR, KBL_FW_MINOR)
55 MODULE_FIRMWARE(I915_KBL_GUC_UCODE);
56
57 #define I915_GLK_GUC_UCODE GUC_FW_PATH(glk, GLK_FW_MAJOR, GLK_FW_MINOR)
58
59 static void guc_fw_select(struct intel_uc_fw *guc_fw)
60 {
61         struct intel_guc *guc = container_of(guc_fw, struct intel_guc, fw);
62         struct drm_i915_private *dev_priv = guc_to_i915(guc);
63
64         GEM_BUG_ON(guc_fw->type != INTEL_UC_FW_TYPE_GUC);
65
66         if (!HAS_GUC(dev_priv))
67                 return;
68
69         if (i915_modparams.guc_firmware_path) {
70                 guc_fw->path = i915_modparams.guc_firmware_path;
71                 guc_fw->major_ver_wanted = 0;
72                 guc_fw->minor_ver_wanted = 0;
73         } else if (IS_SKYLAKE(dev_priv)) {
74                 guc_fw->path = I915_SKL_GUC_UCODE;
75                 guc_fw->major_ver_wanted = SKL_FW_MAJOR;
76                 guc_fw->minor_ver_wanted = SKL_FW_MINOR;
77         } else if (IS_BROXTON(dev_priv)) {
78                 guc_fw->path = I915_BXT_GUC_UCODE;
79                 guc_fw->major_ver_wanted = BXT_FW_MAJOR;
80                 guc_fw->minor_ver_wanted = BXT_FW_MINOR;
81         } else if (IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv)) {
82                 guc_fw->path = I915_KBL_GUC_UCODE;
83                 guc_fw->major_ver_wanted = KBL_FW_MAJOR;
84                 guc_fw->minor_ver_wanted = KBL_FW_MINOR;
85         } else if (IS_GEMINILAKE(dev_priv)) {
86                 guc_fw->path = I915_GLK_GUC_UCODE;
87                 guc_fw->major_ver_wanted = GLK_FW_MAJOR;
88                 guc_fw->minor_ver_wanted = GLK_FW_MINOR;
89         } else {
90                 DRM_WARN("%s: No firmware known for this platform!\n",
91                          intel_uc_fw_type_repr(guc_fw->type));
92         }
93 }
94
95 /**
96  * intel_guc_fw_init_early() - initializes GuC firmware struct
97  * @guc: intel_guc struct
98  *
99  * On platforms with GuC selects firmware for uploading
100  */
101 void intel_guc_fw_init_early(struct intel_guc *guc)
102 {
103         struct intel_uc_fw *guc_fw = &guc->fw;
104
105         intel_uc_fw_init(guc_fw, INTEL_UC_FW_TYPE_GUC);
106         guc_fw_select(guc_fw);
107 }
108
109 static void guc_prepare_xfer(struct intel_guc *guc)
110 {
111         struct drm_i915_private *dev_priv = guc_to_i915(guc);
112
113         /* Must program this register before loading the ucode with DMA */
114         I915_WRITE(GUC_SHIM_CONTROL, GUC_DISABLE_SRAM_INIT_TO_ZEROES |
115                                      GUC_ENABLE_READ_CACHE_LOGIC |
116                                      GUC_ENABLE_MIA_CACHING |
117                                      GUC_ENABLE_READ_CACHE_FOR_SRAM_DATA |
118                                      GUC_ENABLE_READ_CACHE_FOR_WOPCM_DATA |
119                                      GUC_ENABLE_MIA_CLOCK_GATING);
120
121         if (IS_GEN9_LP(dev_priv))
122                 I915_WRITE(GEN9LP_GT_PM_CONFIG, GT_DOORBELL_ENABLE);
123         else
124                 I915_WRITE(GEN9_GT_PM_CONFIG, GT_DOORBELL_ENABLE);
125
126         if (IS_GEN9(dev_priv)) {
127                 /* DOP Clock Gating Enable for GuC clocks */
128                 I915_WRITE(GEN7_MISCCPCTL, (GEN8_DOP_CLOCK_GATE_GUC_ENABLE |
129                                             I915_READ(GEN7_MISCCPCTL)));
130
131                 /* allows for 5us (in 10ns units) before GT can go to RC6 */
132                 I915_WRITE(GUC_ARAT_C6DIS, 0x1FF);
133         }
134 }
135
136 /* Copy RSA signature from the fw image to HW for verification */
137 static int guc_xfer_rsa(struct intel_guc *guc, struct i915_vma *vma)
138 {
139         struct drm_i915_private *dev_priv = guc_to_i915(guc);
140         struct intel_uc_fw *guc_fw = &guc->fw;
141         struct sg_table *sg = vma->pages;
142         u32 rsa[UOS_RSA_SCRATCH_COUNT];
143         int i;
144
145         if (sg_pcopy_to_buffer(sg->sgl, sg->nents, rsa, sizeof(rsa),
146                                guc_fw->rsa_offset) != sizeof(rsa))
147                 return -EINVAL;
148
149         for (i = 0; i < UOS_RSA_SCRATCH_COUNT; i++)
150                 I915_WRITE(UOS_RSA_SCRATCH(i), rsa[i]);
151
152         return 0;
153 }
154
155 /*
156  * Transfer the firmware image to RAM for execution by the microcontroller.
157  *
158  * Architecturally, the DMA engine is bidirectional, and can potentially even
159  * transfer between GTT locations. This functionality is left out of the API
160  * for now as there is no need for it.
161  */
162 static int guc_xfer_ucode(struct intel_guc *guc, struct i915_vma *vma)
163 {
164         struct drm_i915_private *dev_priv = guc_to_i915(guc);
165         struct intel_uc_fw *guc_fw = &guc->fw;
166         unsigned long offset;
167         u32 status;
168         int ret;
169
170         /*
171          * The header plus uCode will be copied to WOPCM via DMA, excluding any
172          * other components
173          */
174         I915_WRITE(DMA_COPY_SIZE, guc_fw->header_size + guc_fw->ucode_size);
175
176         /* Set the source address for the new blob */
177         offset = guc_ggtt_offset(vma) + guc_fw->header_offset;
178         I915_WRITE(DMA_ADDR_0_LOW, lower_32_bits(offset));
179         I915_WRITE(DMA_ADDR_0_HIGH, upper_32_bits(offset) & 0xFFFF);
180
181         /*
182          * Set the DMA destination. Current uCode expects the code to be
183          * loaded at 8k; locations below this are used for the stack.
184          */
185         I915_WRITE(DMA_ADDR_1_LOW, 0x2000);
186         I915_WRITE(DMA_ADDR_1_HIGH, DMA_ADDRESS_SPACE_WOPCM);
187
188         /* Finally start the DMA */
189         I915_WRITE(DMA_CTRL, _MASKED_BIT_ENABLE(UOS_MOVE | START_DMA));
190
191         /* Wait for DMA to finish */
192         ret = __intel_wait_for_register_fw(dev_priv, DMA_CTRL, START_DMA, 0,
193                                            2, 100, &status);
194         DRM_DEBUG_DRIVER("GuC DMA status %#x\n", status);
195
196         return ret;
197 }
198
199 /*
200  * Read the GuC status register (GUC_STATUS) and store it in the
201  * specified location; then return a boolean indicating whether
202  * the value matches either of two values representing completion
203  * of the GuC boot process.
204  *
205  * This is used for polling the GuC status in a wait_for()
206  * loop below.
207  */
208 static inline bool guc_ready(struct intel_guc *guc, u32 *status)
209 {
210         struct drm_i915_private *dev_priv = guc_to_i915(guc);
211         u32 val = I915_READ(GUC_STATUS);
212         u32 uk_val = val & GS_UKERNEL_MASK;
213
214         *status = val;
215         return (uk_val == GS_UKERNEL_READY) ||
216                 ((val & GS_MIA_CORE_STATE) && (uk_val == GS_UKERNEL_LAPIC_DONE));
217 }
218
219 static int guc_wait_ucode(struct intel_guc *guc)
220 {
221         u32 status;
222         int ret;
223
224         /*
225          * Wait for the GuC to start up.
226          * NB: Docs recommend not using the interrupt for completion.
227          * Measurements indicate this should take no more than 20ms, so a
228          * timeout here indicates that the GuC has failed and is unusable.
229          * (Higher levels of the driver will attempt to fall back to
230          * execlist mode if this happens.)
231          */
232         ret = wait_for(guc_ready(guc, &status), 100);
233         DRM_DEBUG_DRIVER("GuC status %#x\n", status);
234
235         if ((status & GS_BOOTROM_MASK) == GS_BOOTROM_RSA_FAILED) {
236                 DRM_ERROR("GuC firmware signature verification failed\n");
237                 ret = -ENOEXEC;
238         }
239
240         return ret;
241 }
242
243 /*
244  * Load the GuC firmware blob into the MinuteIA.
245  */
246 static int guc_fw_xfer(struct intel_uc_fw *guc_fw, struct i915_vma *vma)
247 {
248         struct intel_guc *guc = container_of(guc_fw, struct intel_guc, fw);
249         struct drm_i915_private *dev_priv = guc_to_i915(guc);
250         int ret;
251
252         GEM_BUG_ON(guc_fw->type != INTEL_UC_FW_TYPE_GUC);
253
254         intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
255
256         guc_prepare_xfer(guc);
257
258         /*
259          * Note that GuC needs the CSS header plus uKernel code to be copied
260          * by the DMA engine in one operation, whereas the RSA signature is
261          * loaded via MMIO.
262          */
263         ret = guc_xfer_rsa(guc, vma);
264         if (ret)
265                 DRM_WARN("GuC firmware signature xfer error %d\n", ret);
266
267         ret = guc_xfer_ucode(guc, vma);
268         if (ret)
269                 DRM_WARN("GuC firmware code xfer error %d\n", ret);
270
271         ret = guc_wait_ucode(guc);
272         if (ret)
273                 DRM_ERROR("GuC firmware xfer error %d\n", ret);
274
275         intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
276
277         return ret;
278 }
279
280 /**
281  * intel_guc_fw_upload() - finish preparing the GuC for activity
282  * @guc: intel_guc structure
283  *
284  * Called during driver loading and also after a GPU reset.
285  *
286  * The main action required here it to load the GuC uCode into the device.
287  * The firmware image should have already been fetched into memory by the
288  * earlier call to intel_guc_init(), so here we need only check that
289  * worked, and then transfer the image to the h/w.
290  *
291  * Return:      non-zero code on error
292  */
293 int intel_guc_fw_upload(struct intel_guc *guc)
294 {
295         return intel_uc_fw_upload(&guc->fw, guc_fw_xfer);
296 }