2 * Copyright © 2014 Intel Corporation
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:
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
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
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>
33 * DOC: GuC-specific firmware loader
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.
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
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.
55 #define SKL_FW_MAJOR 6
56 #define SKL_FW_MINOR 1
58 #define BXT_FW_MAJOR 8
59 #define BXT_FW_MINOR 7
61 #define KBL_FW_MAJOR 9
62 #define KBL_FW_MINOR 14
64 #define GLK_FW_MAJOR 10
65 #define GLK_FW_MINOR 56
67 #define GUC_FW_PATH(platform, major, minor) \
68 "i915/" __stringify(platform) "_guc_ver" __stringify(major) "_" __stringify(minor) ".bin"
70 #define I915_SKL_GUC_UCODE GUC_FW_PATH(skl, SKL_FW_MAJOR, SKL_FW_MINOR)
71 MODULE_FIRMWARE(I915_SKL_GUC_UCODE);
73 #define I915_BXT_GUC_UCODE GUC_FW_PATH(bxt, BXT_FW_MAJOR, BXT_FW_MINOR)
74 MODULE_FIRMWARE(I915_BXT_GUC_UCODE);
76 #define I915_KBL_GUC_UCODE GUC_FW_PATH(kbl, KBL_FW_MAJOR, KBL_FW_MINOR)
77 MODULE_FIRMWARE(I915_KBL_GUC_UCODE);
79 #define I915_GLK_GUC_UCODE GUC_FW_PATH(glk, GLK_FW_MAJOR, GLK_FW_MINOR)
82 static u32 get_gttype(struct drm_i915_private *dev_priv)
84 /* XXX: GT type based on PCI device ID? field seems unused by fw */
88 static u32 get_core_family(struct drm_i915_private *dev_priv)
90 u32 gen = INTEL_GEN(dev_priv);
94 return GUC_CORE_FAMILY_GEN9;
98 return GUC_CORE_FAMILY_UNKNOWN;
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.
107 static void guc_params_init(struct drm_i915_private *dev_priv)
109 struct intel_guc *guc = &dev_priv->guc;
110 u32 params[GUC_CTL_MAX_DWORDS];
113 memset(¶ms, 0, sizeof(params));
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);
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
124 params[GUC_CTL_ARAT_HIGH] = 0;
125 params[GUC_CTL_ARAT_LOW] = 100000000;
127 params[GUC_CTL_WA] |= GUC_CTL_WA_UK_BY_DRIVER;
129 params[GUC_CTL_FEATURE] |= GUC_CTL_DISABLE_SCHEDULER |
130 GUC_CTL_VCS2_ENABLED;
132 params[GUC_CTL_LOG_PARAMS] = guc->log.flags;
134 if (i915.guc_log_level >= 0) {
135 params[GUC_CTL_DEBUG] =
136 i915.guc_log_level << GUC_LOG_VERBOSITY_SHIFT;
138 params[GUC_CTL_DEBUG] = GUC_LOG_DISABLED;
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;
146 params[GUC_CTL_DEBUG] |= ads << GUC_ADS_ADDR_SHIFT;
147 params[GUC_CTL_DEBUG] |= GUC_ADS_ENABLED;
150 params[GUC_CTL_CTXINFO] = (pgs << GUC_CTL_BASE_ADDR_SHIFT) |
151 (ctx_in_16 << GUC_CTL_CTXNUM_IN16_SHIFT);
153 params[GUC_CTL_FEATURE] |= GUC_CTL_KERNEL_SUBMISSIONS;
155 /* Unmask this bit to enable the GuC's internal scheduler */
156 params[GUC_CTL_FEATURE] &= ~GUC_CTL_DISABLE_SCHEDULER;
159 I915_WRITE(SOFT_SCRATCH(0), 0);
161 for (i = 0; i < GUC_CTL_MAX_DWORDS; i++)
162 I915_WRITE(SOFT_SCRATCH(1 + i), params[i]);
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.
171 * This is used for polling the GuC status in a wait_for()
174 static inline bool guc_ucode_response(struct drm_i915_private *dev_priv,
177 u32 val = I915_READ(GUC_STATUS);
178 u32 uk_val = val & GS_UKERNEL_MASK;
180 return (uk_val == GS_UKERNEL_READY ||
181 ((val & GS_MIA_CORE_STATE) && uk_val == GS_UKERNEL_LAPIC_DONE));
185 * Transfer the firmware image to RAM for execution by the microcontroller.
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.
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.
194 static int guc_ucode_xfer_dma(struct drm_i915_private *dev_priv,
195 struct i915_vma *vma)
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];
203 /* where RSA signature starts */
204 offset = guc_fw->rsa_offset;
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]);
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);
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);
221 * Set the DMA destination. Current uCode expects the code to be
222 * loaded at 8k; locations below this are used for the stack.
224 I915_WRITE(DMA_ADDR_1_LOW, 0x2000);
225 I915_WRITE(DMA_ADDR_1_HIGH, DMA_ADDRESS_SPACE_WOPCM);
227 /* Finally start the DMA */
228 I915_WRITE(DMA_CTRL, _MASKED_BIT_ENABLE(UOS_MOVE | START_DMA));
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.)
238 ret = wait_for(guc_ucode_response(dev_priv, &status), 100);
240 DRM_DEBUG_DRIVER("DMA status 0x%x, GuC status 0x%x\n",
241 I915_READ(DMA_CTRL), status);
243 if ((status & GS_BOOTROM_MASK) == GS_BOOTROM_RSA_FAILED) {
244 DRM_ERROR("GuC firmware signature verification failed\n");
248 DRM_DEBUG_DRIVER("returning %d\n", ret);
253 u32 intel_guc_wopcm_size(struct drm_i915_private *dev_priv)
255 u32 wopcm_size = GUC_WOPCM_TOP;
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;
265 * Load the GuC firmware blob into the MinuteIA.
267 static int guc_ucode_xfer(struct drm_i915_private *dev_priv)
269 struct intel_uc_fw *guc_fw = &dev_priv->guc.fw;
270 struct i915_vma *vma;
273 ret = i915_gem_object_set_to_gtt_domain(guc_fw->obj, false);
275 DRM_DEBUG_DRIVER("set-domain failed %d\n", ret);
279 vma = i915_gem_object_ggtt_pin(guc_fw->obj, NULL, 0, 0,
280 PIN_OFFSET_BIAS | GUC_WOPCM_TOP);
282 DRM_DEBUG_DRIVER("pin failed %d\n", (int)PTR_ERR(vma));
286 intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
288 /* Enable MIA caching. GuC clock gating is disabled. */
289 I915_WRITE(GUC_SHIM_CONTROL, GUC_SHIM_CONTROL_VALUE);
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));
297 /* WaC6DisallowByGfxPause:bxt */
298 if (IS_BXT_REVID(dev_priv, 0, BXT_REVID_B0))
299 I915_WRITE(GEN6_GFXPAUSE, 0x30FFF);
301 if (IS_GEN9_LP(dev_priv))
302 I915_WRITE(GEN9LP_GT_PM_CONFIG, GT_DOORBELL_ENABLE);
304 I915_WRITE(GEN9_GT_PM_CONFIG, GT_DOORBELL_ENABLE);
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)));
311 /* allows for 5us (in 10ns units) before GT can go to RC6 */
312 I915_WRITE(GUC_ARAT_C6DIS, 0x1FF);
315 guc_params_init(dev_priv);
317 ret = guc_ucode_xfer_dma(dev_priv, vma);
319 intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
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.
331 * intel_guc_init_hw() - finish preparing the GuC for activity
332 * @guc: intel_guc structure
334 * Called during driver loading and also after a GPU reset.
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.
341 * Return: non-zero code on error
343 int intel_guc_init_hw(struct intel_guc *guc)
345 struct drm_i915_private *dev_priv = guc_to_i915(guc);
346 const char *fw_path = guc->fw.path;
349 DRM_DEBUG_DRIVER("GuC fw status: path %s, fetch %s, load %s\n",
351 intel_uc_fw_status_repr(guc->fw.fetch_status),
352 intel_uc_fw_status_repr(guc->fw.load_status));
354 if (guc->fw.fetch_status != INTEL_UC_FIRMWARE_SUCCESS)
357 guc->fw.load_status = INTEL_UC_FIRMWARE_PENDING;
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));
363 ret = guc_ucode_xfer(dev_priv);
368 guc->fw.load_status = INTEL_UC_FIRMWARE_SUCCESS;
370 DRM_INFO("GuC %s (firmware %s [version %u.%u])\n",
371 i915.enable_guc_submission ? "submission enabled" : "loaded",
373 guc->fw.major_ver_found, guc->fw.minor_ver_found);
379 * intel_guc_select_fw() - selects GuC firmware for loading
380 * @guc: intel_guc struct
382 * Return: zero when we know firmware, non-zero in other case
384 int intel_guc_select_fw(struct intel_guc *guc)
386 struct drm_i915_private *dev_priv = guc_to_i915(guc);
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;
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;
414 DRM_ERROR("No GuC firmware known for platform with GuC!\n");