drm/tilcdc: Remove obsolete "ti,tilcdc,slave" dts binding support
[sfrench/cifs-2.6.git] / drivers / gpu / drm / i915 / intel_guc_loader.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 #include "i915_drv.h"
30 #include "intel_uc.h"
31
32 /**
33  * DOC: GuC-specific firmware loader
34  *
35  * intel_guc:
36  * Top level structure of guc. It handles firmware loading and manages client
37  * pool and doorbells. intel_guc owns a i915_guc_client to replace the legacy
38  * ExecList submission.
39  *
40  * Firmware versioning:
41  * The firmware build process will generate a version header file with major and
42  * minor version defined. The versions are built into CSS header of firmware.
43  * i915 kernel driver set the minimal firmware version required per platform.
44  * The firmware installation package will install (symbolic link) proper version
45  * of firmware.
46  *
47  * GuC address space:
48  * GuC does not allow any gfx GGTT address that falls into range [0, WOPCM_TOP),
49  * which is reserved for Boot ROM, SRAM and WOPCM. Currently this top address is
50  * 512K. In order to exclude 0-512K address space from GGTT, all gfx objects
51  * used by GuC is pinned with PIN_OFFSET_BIAS along with size of WOPCM.
52  *
53  */
54
55 #define SKL_FW_MAJOR 6
56 #define SKL_FW_MINOR 1
57
58 #define BXT_FW_MAJOR 8
59 #define BXT_FW_MINOR 7
60
61 #define KBL_FW_MAJOR 9
62 #define KBL_FW_MINOR 14
63
64 #define GLK_FW_MAJOR 10
65 #define GLK_FW_MINOR 56
66
67 #define GUC_FW_PATH(platform, major, minor) \
68        "i915/" __stringify(platform) "_guc_ver" __stringify(major) "_" __stringify(minor) ".bin"
69
70 #define I915_SKL_GUC_UCODE GUC_FW_PATH(skl, SKL_FW_MAJOR, SKL_FW_MINOR)
71 MODULE_FIRMWARE(I915_SKL_GUC_UCODE);
72
73 #define I915_BXT_GUC_UCODE GUC_FW_PATH(bxt, BXT_FW_MAJOR, BXT_FW_MINOR)
74 MODULE_FIRMWARE(I915_BXT_GUC_UCODE);
75
76 #define I915_KBL_GUC_UCODE GUC_FW_PATH(kbl, KBL_FW_MAJOR, KBL_FW_MINOR)
77 MODULE_FIRMWARE(I915_KBL_GUC_UCODE);
78
79 #define I915_GLK_GUC_UCODE GUC_FW_PATH(glk, GLK_FW_MAJOR, GLK_FW_MINOR)
80
81
82 static u32 get_gttype(struct drm_i915_private *dev_priv)
83 {
84         /* XXX: GT type based on PCI device ID? field seems unused by fw */
85         return 0;
86 }
87
88 static u32 get_core_family(struct drm_i915_private *dev_priv)
89 {
90         u32 gen = INTEL_GEN(dev_priv);
91
92         switch (gen) {
93         case 9:
94                 return GUC_CORE_FAMILY_GEN9;
95
96         default:
97                 MISSING_CASE(gen);
98                 return GUC_CORE_FAMILY_UNKNOWN;
99         }
100 }
101
102 /*
103  * Initialise the GuC parameter block before starting the firmware
104  * transfer. These parameters are read by the firmware on startup
105  * and cannot be changed thereafter.
106  */
107 static void guc_params_init(struct drm_i915_private *dev_priv)
108 {
109         struct intel_guc *guc = &dev_priv->guc;
110         u32 params[GUC_CTL_MAX_DWORDS];
111         int i;
112
113         memset(&params, 0, sizeof(params));
114
115         params[GUC_CTL_DEVICE_INFO] |=
116                 (get_gttype(dev_priv) << GUC_CTL_GTTYPE_SHIFT) |
117                 (get_core_family(dev_priv) << GUC_CTL_COREFAMILY_SHIFT);
118
119         /*
120          * GuC ARAT increment is 10 ns. GuC default scheduler quantum is one
121          * second. This ARAR is calculated by:
122          * Scheduler-Quantum-in-ns / ARAT-increment-in-ns = 1000000000 / 10
123          */
124         params[GUC_CTL_ARAT_HIGH] = 0;
125         params[GUC_CTL_ARAT_LOW] = 100000000;
126
127         params[GUC_CTL_WA] |= GUC_CTL_WA_UK_BY_DRIVER;
128
129         params[GUC_CTL_FEATURE] |= GUC_CTL_DISABLE_SCHEDULER |
130                         GUC_CTL_VCS2_ENABLED;
131
132         params[GUC_CTL_LOG_PARAMS] = guc->log.flags;
133
134         if (i915.guc_log_level >= 0) {
135                 params[GUC_CTL_DEBUG] =
136                         i915.guc_log_level << GUC_LOG_VERBOSITY_SHIFT;
137         } else
138                 params[GUC_CTL_DEBUG] = GUC_LOG_DISABLED;
139
140         /* If GuC submission is enabled, set up additional parameters here */
141         if (i915.enable_guc_submission) {
142                 u32 ads = guc_ggtt_offset(guc->ads_vma) >> PAGE_SHIFT;
143                 u32 pgs = guc_ggtt_offset(dev_priv->guc.stage_desc_pool);
144                 u32 ctx_in_16 = GUC_MAX_STAGE_DESCRIPTORS / 16;
145
146                 params[GUC_CTL_DEBUG] |= ads << GUC_ADS_ADDR_SHIFT;
147                 params[GUC_CTL_DEBUG] |= GUC_ADS_ENABLED;
148
149                 pgs >>= PAGE_SHIFT;
150                 params[GUC_CTL_CTXINFO] = (pgs << GUC_CTL_BASE_ADDR_SHIFT) |
151                         (ctx_in_16 << GUC_CTL_CTXNUM_IN16_SHIFT);
152
153                 params[GUC_CTL_FEATURE] |= GUC_CTL_KERNEL_SUBMISSIONS;
154
155                 /* Unmask this bit to enable the GuC's internal scheduler */
156                 params[GUC_CTL_FEATURE] &= ~GUC_CTL_DISABLE_SCHEDULER;
157         }
158
159         I915_WRITE(SOFT_SCRATCH(0), 0);
160
161         for (i = 0; i < GUC_CTL_MAX_DWORDS; i++)
162                 I915_WRITE(SOFT_SCRATCH(1 + i), params[i]);
163 }
164
165 /*
166  * Read the GuC status register (GUC_STATUS) and store it in the
167  * specified location; then return a boolean indicating whether
168  * the value matches either of two values representing completion
169  * of the GuC boot process.
170  *
171  * This is used for polling the GuC status in a wait_for()
172  * loop below.
173  */
174 static inline bool guc_ucode_response(struct drm_i915_private *dev_priv,
175                                       u32 *status)
176 {
177         u32 val = I915_READ(GUC_STATUS);
178         u32 uk_val = val & GS_UKERNEL_MASK;
179         *status = val;
180         return (uk_val == GS_UKERNEL_READY ||
181                 ((val & GS_MIA_CORE_STATE) && uk_val == GS_UKERNEL_LAPIC_DONE));
182 }
183
184 /*
185  * Transfer the firmware image to RAM for execution by the microcontroller.
186  *
187  * Architecturally, the DMA engine is bidirectional, and can potentially even
188  * transfer between GTT locations. This functionality is left out of the API
189  * for now as there is no need for it.
190  *
191  * Note that GuC needs the CSS header plus uKernel code to be copied by the
192  * DMA engine in one operation, whereas the RSA signature is loaded via MMIO.
193  */
194 static int guc_ucode_xfer_dma(struct drm_i915_private *dev_priv,
195                               struct i915_vma *vma)
196 {
197         struct intel_uc_fw *guc_fw = &dev_priv->guc.fw;
198         unsigned long offset;
199         struct sg_table *sg = vma->pages;
200         u32 status, rsa[UOS_RSA_SCRATCH_MAX_COUNT];
201         int i, ret = 0;
202
203         /* where RSA signature starts */
204         offset = guc_fw->rsa_offset;
205
206         /* Copy RSA signature from the fw image to HW for verification */
207         sg_pcopy_to_buffer(sg->sgl, sg->nents, rsa, sizeof(rsa), offset);
208         for (i = 0; i < UOS_RSA_SCRATCH_MAX_COUNT; i++)
209                 I915_WRITE(UOS_RSA_SCRATCH(i), rsa[i]);
210
211         /* The header plus uCode will be copied to WOPCM via DMA, excluding any
212          * other components */
213         I915_WRITE(DMA_COPY_SIZE, guc_fw->header_size + guc_fw->ucode_size);
214
215         /* Set the source address for the new blob */
216         offset = guc_ggtt_offset(vma) + guc_fw->header_offset;
217         I915_WRITE(DMA_ADDR_0_LOW, lower_32_bits(offset));
218         I915_WRITE(DMA_ADDR_0_HIGH, upper_32_bits(offset) & 0xFFFF);
219
220         /*
221          * Set the DMA destination. Current uCode expects the code to be
222          * loaded at 8k; locations below this are used for the stack.
223          */
224         I915_WRITE(DMA_ADDR_1_LOW, 0x2000);
225         I915_WRITE(DMA_ADDR_1_HIGH, DMA_ADDRESS_SPACE_WOPCM);
226
227         /* Finally start the DMA */
228         I915_WRITE(DMA_CTRL, _MASKED_BIT_ENABLE(UOS_MOVE | START_DMA));
229
230         /*
231          * Wait for the DMA to complete & the GuC to start up.
232          * NB: Docs recommend not using the interrupt for completion.
233          * Measurements indicate this should take no more than 20ms, so a
234          * timeout here indicates that the GuC has failed and is unusable.
235          * (Higher levels of the driver will attempt to fall back to
236          * execlist mode if this happens.)
237          */
238         ret = wait_for(guc_ucode_response(dev_priv, &status), 100);
239
240         DRM_DEBUG_DRIVER("DMA status 0x%x, GuC status 0x%x\n",
241                         I915_READ(DMA_CTRL), status);
242
243         if ((status & GS_BOOTROM_MASK) == GS_BOOTROM_RSA_FAILED) {
244                 DRM_ERROR("GuC firmware signature verification failed\n");
245                 ret = -ENOEXEC;
246         }
247
248         DRM_DEBUG_DRIVER("returning %d\n", ret);
249
250         return ret;
251 }
252
253 u32 intel_guc_wopcm_size(struct drm_i915_private *dev_priv)
254 {
255         u32 wopcm_size = GUC_WOPCM_TOP;
256
257         /* On BXT, the top of WOPCM is reserved for RC6 context */
258         if (IS_GEN9_LP(dev_priv))
259                 wopcm_size -= BXT_GUC_WOPCM_RC6_RESERVED;
260
261         return wopcm_size;
262 }
263
264 /*
265  * Load the GuC firmware blob into the MinuteIA.
266  */
267 static int guc_ucode_xfer(struct drm_i915_private *dev_priv)
268 {
269         struct intel_uc_fw *guc_fw = &dev_priv->guc.fw;
270         struct i915_vma *vma;
271         int ret;
272
273         ret = i915_gem_object_set_to_gtt_domain(guc_fw->obj, false);
274         if (ret) {
275                 DRM_DEBUG_DRIVER("set-domain failed %d\n", ret);
276                 return ret;
277         }
278
279         vma = i915_gem_object_ggtt_pin(guc_fw->obj, NULL, 0, 0,
280                                        PIN_OFFSET_BIAS | GUC_WOPCM_TOP);
281         if (IS_ERR(vma)) {
282                 DRM_DEBUG_DRIVER("pin failed %d\n", (int)PTR_ERR(vma));
283                 return PTR_ERR(vma);
284         }
285
286         intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
287
288         /* Enable MIA caching. GuC clock gating is disabled. */
289         I915_WRITE(GUC_SHIM_CONTROL, GUC_SHIM_CONTROL_VALUE);
290
291         /* WaDisableMinuteIaClockGating:bxt */
292         if (IS_BXT_REVID(dev_priv, 0, BXT_REVID_A1)) {
293                 I915_WRITE(GUC_SHIM_CONTROL, (I915_READ(GUC_SHIM_CONTROL) &
294                                               ~GUC_ENABLE_MIA_CLOCK_GATING));
295         }
296
297         /* WaC6DisallowByGfxPause:bxt */
298         if (IS_BXT_REVID(dev_priv, 0, BXT_REVID_B0))
299                 I915_WRITE(GEN6_GFXPAUSE, 0x30FFF);
300
301         if (IS_GEN9_LP(dev_priv))
302                 I915_WRITE(GEN9LP_GT_PM_CONFIG, GT_DOORBELL_ENABLE);
303         else
304                 I915_WRITE(GEN9_GT_PM_CONFIG, GT_DOORBELL_ENABLE);
305
306         if (IS_GEN9(dev_priv)) {
307                 /* DOP Clock Gating Enable for GuC clocks */
308                 I915_WRITE(GEN7_MISCCPCTL, (GEN8_DOP_CLOCK_GATE_GUC_ENABLE |
309                                             I915_READ(GEN7_MISCCPCTL)));
310
311                 /* allows for 5us (in 10ns units) before GT can go to RC6 */
312                 I915_WRITE(GUC_ARAT_C6DIS, 0x1FF);
313         }
314
315         guc_params_init(dev_priv);
316
317         ret = guc_ucode_xfer_dma(dev_priv, vma);
318
319         intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
320
321         /*
322          * We keep the object pages for reuse during resume. But we can unpin it
323          * now that DMA has completed, so it doesn't continue to take up space.
324          */
325         i915_vma_unpin(vma);
326
327         return ret;
328 }
329
330 /**
331  * intel_guc_init_hw() - finish preparing the GuC for activity
332  * @guc: intel_guc structure
333  *
334  * Called during driver loading and also after a GPU reset.
335  *
336  * The main action required here it to load the GuC uCode into the device.
337  * The firmware image should have already been fetched into memory by the
338  * earlier call to intel_guc_init(), so here we need only check that
339  * worked, and then transfer the image to the h/w.
340  *
341  * Return:      non-zero code on error
342  */
343 int intel_guc_init_hw(struct intel_guc *guc)
344 {
345         struct drm_i915_private *dev_priv = guc_to_i915(guc);
346         const char *fw_path = guc->fw.path;
347         int ret;
348
349         DRM_DEBUG_DRIVER("GuC fw status: path %s, fetch %s, load %s\n",
350                 fw_path,
351                 intel_uc_fw_status_repr(guc->fw.fetch_status),
352                 intel_uc_fw_status_repr(guc->fw.load_status));
353
354         if (guc->fw.fetch_status != INTEL_UC_FIRMWARE_SUCCESS)
355                 return -EIO;
356
357         guc->fw.load_status = INTEL_UC_FIRMWARE_PENDING;
358
359         DRM_DEBUG_DRIVER("GuC fw status: fetch %s, load %s\n",
360                 intel_uc_fw_status_repr(guc->fw.fetch_status),
361                 intel_uc_fw_status_repr(guc->fw.load_status));
362
363         ret = guc_ucode_xfer(dev_priv);
364
365         if (ret)
366                 return -EAGAIN;
367
368         guc->fw.load_status = INTEL_UC_FIRMWARE_SUCCESS;
369
370         DRM_INFO("GuC %s (firmware %s [version %u.%u])\n",
371                  i915.enable_guc_submission ? "submission enabled" : "loaded",
372                  guc->fw.path,
373                  guc->fw.major_ver_found, guc->fw.minor_ver_found);
374
375         return 0;
376 }
377
378 /**
379  * intel_guc_select_fw() - selects GuC firmware for loading
380  * @guc:        intel_guc struct
381  *
382  * Return: zero when we know firmware, non-zero in other case
383  */
384 int intel_guc_select_fw(struct intel_guc *guc)
385 {
386         struct drm_i915_private *dev_priv = guc_to_i915(guc);
387
388         guc->fw.path = NULL;
389         guc->fw.fetch_status = INTEL_UC_FIRMWARE_NONE;
390         guc->fw.load_status = INTEL_UC_FIRMWARE_NONE;
391         guc->fw.type = INTEL_UC_FW_TYPE_GUC;
392
393         if (i915.guc_firmware_path) {
394                 guc->fw.path = i915.guc_firmware_path;
395                 guc->fw.major_ver_wanted = 0;
396                 guc->fw.minor_ver_wanted = 0;
397         } else if (IS_SKYLAKE(dev_priv)) {
398                 guc->fw.path = I915_SKL_GUC_UCODE;
399                 guc->fw.major_ver_wanted = SKL_FW_MAJOR;
400                 guc->fw.minor_ver_wanted = SKL_FW_MINOR;
401         } else if (IS_BROXTON(dev_priv)) {
402                 guc->fw.path = I915_BXT_GUC_UCODE;
403                 guc->fw.major_ver_wanted = BXT_FW_MAJOR;
404                 guc->fw.minor_ver_wanted = BXT_FW_MINOR;
405         } else if (IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv)) {
406                 guc->fw.path = I915_KBL_GUC_UCODE;
407                 guc->fw.major_ver_wanted = KBL_FW_MAJOR;
408                 guc->fw.minor_ver_wanted = KBL_FW_MINOR;
409         } else if (IS_GEMINILAKE(dev_priv)) {
410                 guc->fw.path = I915_GLK_GUC_UCODE;
411                 guc->fw.major_ver_wanted = GLK_FW_MAJOR;
412                 guc->fw.minor_ver_wanted = GLK_FW_MINOR;
413         } else {
414                 DRM_ERROR("No GuC firmware known for platform with GuC!\n");
415                 return -ENOENT;
416         }
417
418         return 0;
419 }