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>
30 #include "intel_guc_fw.h"
33 #define SKL_FW_MAJOR 9
34 #define SKL_FW_MINOR 33
36 #define BXT_FW_MAJOR 9
37 #define BXT_FW_MINOR 29
39 #define KBL_FW_MAJOR 9
40 #define KBL_FW_MINOR 39
42 #define GLK_FW_MAJOR 10
43 #define GLK_FW_MINOR 56
45 #define GUC_FW_PATH(platform, major, minor) \
46 "i915/" __stringify(platform) "_guc_ver" __stringify(major) "_" __stringify(minor) ".bin"
48 #define I915_SKL_GUC_UCODE GUC_FW_PATH(skl, SKL_FW_MAJOR, SKL_FW_MINOR)
49 MODULE_FIRMWARE(I915_SKL_GUC_UCODE);
51 #define I915_BXT_GUC_UCODE GUC_FW_PATH(bxt, BXT_FW_MAJOR, BXT_FW_MINOR)
52 MODULE_FIRMWARE(I915_BXT_GUC_UCODE);
54 #define I915_KBL_GUC_UCODE GUC_FW_PATH(kbl, KBL_FW_MAJOR, KBL_FW_MINOR)
55 MODULE_FIRMWARE(I915_KBL_GUC_UCODE);
57 #define I915_GLK_GUC_UCODE GUC_FW_PATH(glk, GLK_FW_MAJOR, GLK_FW_MINOR)
59 static void guc_fw_select(struct intel_uc_fw *guc_fw)
61 struct intel_guc *guc = container_of(guc_fw, struct intel_guc, fw);
62 struct drm_i915_private *dev_priv = guc_to_i915(guc);
64 GEM_BUG_ON(guc_fw->type != INTEL_UC_FW_TYPE_GUC);
66 if (!HAS_GUC(dev_priv))
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;
90 DRM_WARN("%s: No firmware known for this platform!\n",
91 intel_uc_fw_type_repr(guc_fw->type));
96 * intel_guc_fw_init_early() - initializes GuC firmware struct
97 * @guc: intel_guc struct
99 * On platforms with GuC selects firmware for uploading
101 void intel_guc_fw_init_early(struct intel_guc *guc)
103 struct intel_uc_fw *guc_fw = &guc->fw;
105 intel_uc_fw_init(guc_fw, INTEL_UC_FW_TYPE_GUC);
106 guc_fw_select(guc_fw);
109 static void guc_prepare_xfer(struct intel_guc *guc)
111 struct drm_i915_private *dev_priv = guc_to_i915(guc);
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);
121 if (IS_GEN9_LP(dev_priv))
122 I915_WRITE(GEN9LP_GT_PM_CONFIG, GT_DOORBELL_ENABLE);
124 I915_WRITE(GEN9_GT_PM_CONFIG, GT_DOORBELL_ENABLE);
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)));
131 /* allows for 5us (in 10ns units) before GT can go to RC6 */
132 I915_WRITE(GUC_ARAT_C6DIS, 0x1FF);
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)
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];
145 if (sg_pcopy_to_buffer(sg->sgl, sg->nents, rsa, sizeof(rsa),
146 guc_fw->rsa_offset) != sizeof(rsa))
149 for (i = 0; i < UOS_RSA_SCRATCH_COUNT; i++)
150 I915_WRITE(UOS_RSA_SCRATCH(i), rsa[i]);
156 * Transfer the firmware image to RAM for execution by the microcontroller.
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.
162 static int guc_xfer_ucode(struct intel_guc *guc, struct i915_vma *vma)
164 struct drm_i915_private *dev_priv = guc_to_i915(guc);
165 struct intel_uc_fw *guc_fw = &guc->fw;
166 unsigned long offset;
171 * The header plus uCode will be copied to WOPCM via DMA, excluding any
174 I915_WRITE(DMA_COPY_SIZE, guc_fw->header_size + guc_fw->ucode_size);
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);
182 * Set the DMA destination. Current uCode expects the code to be
183 * loaded at 8k; locations below this are used for the stack.
185 I915_WRITE(DMA_ADDR_1_LOW, 0x2000);
186 I915_WRITE(DMA_ADDR_1_HIGH, DMA_ADDRESS_SPACE_WOPCM);
188 /* Finally start the DMA */
189 I915_WRITE(DMA_CTRL, _MASKED_BIT_ENABLE(UOS_MOVE | START_DMA));
191 /* Wait for DMA to finish */
192 ret = __intel_wait_for_register_fw(dev_priv, DMA_CTRL, START_DMA, 0,
194 DRM_DEBUG_DRIVER("GuC DMA status %#x\n", status);
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.
205 * This is used for polling the GuC status in a wait_for()
208 static inline bool guc_ready(struct intel_guc *guc, u32 *status)
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;
215 return (uk_val == GS_UKERNEL_READY) ||
216 ((val & GS_MIA_CORE_STATE) && (uk_val == GS_UKERNEL_LAPIC_DONE));
219 static int guc_wait_ucode(struct intel_guc *guc)
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.)
232 ret = wait_for(guc_ready(guc, &status), 100);
233 DRM_DEBUG_DRIVER("GuC status %#x\n", status);
235 if ((status & GS_BOOTROM_MASK) == GS_BOOTROM_RSA_FAILED) {
236 DRM_ERROR("GuC firmware signature verification failed\n");
244 * Load the GuC firmware blob into the MinuteIA.
246 static int guc_fw_xfer(struct intel_uc_fw *guc_fw, struct i915_vma *vma)
248 struct intel_guc *guc = container_of(guc_fw, struct intel_guc, fw);
249 struct drm_i915_private *dev_priv = guc_to_i915(guc);
252 GEM_BUG_ON(guc_fw->type != INTEL_UC_FW_TYPE_GUC);
254 intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
256 guc_prepare_xfer(guc);
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
263 ret = guc_xfer_rsa(guc, vma);
265 DRM_WARN("GuC firmware signature xfer error %d\n", ret);
267 ret = guc_xfer_ucode(guc, vma);
269 DRM_WARN("GuC firmware code xfer error %d\n", ret);
271 ret = guc_wait_ucode(guc);
273 DRM_ERROR("GuC firmware xfer error %d\n", ret);
275 intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
281 * intel_guc_fw_upload() - finish preparing the GuC for activity
282 * @guc: intel_guc structure
284 * Called during driver loading and also after a GPU reset.
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.
291 * Return: non-zero code on error
293 int intel_guc_fw_upload(struct intel_guc *guc)
295 return intel_uc_fw_upload(&guc->fw, guc_fw_xfer);