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>
29 #include <linux/firmware.h>
31 #include "intel_guc.h"
34 * DOC: GuC-specific firmware loader
37 * Top level structure of guc. It handles firmware loading and manages client
38 * pool and doorbells. intel_guc owns a i915_guc_client to replace the legacy
39 * ExecList submission.
41 * Firmware versioning:
42 * The firmware build process will generate a version header file with major and
43 * minor version defined. The versions are built into CSS header of firmware.
44 * i915 kernel driver set the minimal firmware version required per platform.
45 * The firmware installation package will install (symbolic link) proper version
49 * GuC does not allow any gfx GGTT address that falls into range [0, WOPCM_TOP),
50 * which is reserved for Boot ROM, SRAM and WOPCM. Currently this top address is
51 * 512K. In order to exclude 0-512K address space from GGTT, all gfx objects
52 * used by GuC is pinned with PIN_OFFSET_BIAS along with size of WOPCM.
55 * Firmware log is enabled by setting i915.guc_log_level to non-negative level.
56 * Log data is printed out via reading debugfs i915_guc_log_dump. Reading from
57 * i915_guc_load_status will print out firmware loading status and scratch
62 #define I915_SKL_GUC_UCODE "i915/skl_guc_ver6_1.bin"
63 MODULE_FIRMWARE(I915_SKL_GUC_UCODE);
65 #define I915_BXT_GUC_UCODE "i915/bxt_guc_ver8_7.bin"
66 MODULE_FIRMWARE(I915_BXT_GUC_UCODE);
68 /* User-friendly representation of an enum */
69 const char *intel_guc_fw_status_repr(enum intel_guc_fw_status status)
72 case GUC_FIRMWARE_FAIL:
74 case GUC_FIRMWARE_NONE:
76 case GUC_FIRMWARE_PENDING:
78 case GUC_FIRMWARE_SUCCESS:
85 static void direct_interrupts_to_host(struct drm_i915_private *dev_priv)
87 struct intel_engine_cs *engine;
90 /* tell all command streamers NOT to forward interrupts and vblank to GuC */
91 irqs = _MASKED_FIELD(GFX_FORWARD_VBLANK_MASK, GFX_FORWARD_VBLANK_NEVER);
92 irqs |= _MASKED_BIT_DISABLE(GFX_INTERRUPT_STEERING);
93 for_each_engine(engine, dev_priv)
94 I915_WRITE(RING_MODE_GEN7(engine), irqs);
96 /* route all GT interrupts to the host */
97 I915_WRITE(GUC_BCS_RCS_IER, 0);
98 I915_WRITE(GUC_VCS2_VCS1_IER, 0);
99 I915_WRITE(GUC_WD_VECS_IER, 0);
102 static void direct_interrupts_to_guc(struct drm_i915_private *dev_priv)
104 struct intel_engine_cs *engine;
108 /* tell all command streamers to forward interrupts and vblank to GuC */
109 irqs = _MASKED_FIELD(GFX_FORWARD_VBLANK_MASK, GFX_FORWARD_VBLANK_ALWAYS);
110 irqs |= _MASKED_BIT_ENABLE(GFX_INTERRUPT_STEERING);
111 for_each_engine(engine, dev_priv)
112 I915_WRITE(RING_MODE_GEN7(engine), irqs);
114 /* route USER_INTERRUPT to Host, all others are sent to GuC. */
115 irqs = GT_RENDER_USER_INTERRUPT << GEN8_RCS_IRQ_SHIFT |
116 GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT;
117 /* These three registers have the same bit definitions */
118 I915_WRITE(GUC_BCS_RCS_IER, ~irqs);
119 I915_WRITE(GUC_VCS2_VCS1_IER, ~irqs);
120 I915_WRITE(GUC_WD_VECS_IER, ~irqs);
123 * If GuC has routed PM interrupts to itself, don't keep it.
124 * and keep other interrupts those are unmasked by GuC.
126 tmp = I915_READ(GEN6_PMINTRMSK);
127 if (tmp & GEN8_PMINTR_REDIRECT_TO_NON_DISP) {
128 dev_priv->rps.pm_intr_keep |= ~(tmp & ~GEN8_PMINTR_REDIRECT_TO_NON_DISP);
129 dev_priv->rps.pm_intr_keep &= ~GEN8_PMINTR_REDIRECT_TO_NON_DISP;
133 static u32 get_gttype(struct drm_i915_private *dev_priv)
135 /* XXX: GT type based on PCI device ID? field seems unused by fw */
139 static u32 get_core_family(struct drm_i915_private *dev_priv)
141 switch (INTEL_INFO(dev_priv)->gen) {
143 return GFXCORE_FAMILY_GEN9;
146 DRM_ERROR("GUC: unsupported core family\n");
147 return GFXCORE_FAMILY_UNKNOWN;
151 static void set_guc_init_params(struct drm_i915_private *dev_priv)
153 struct intel_guc *guc = &dev_priv->guc;
154 u32 params[GUC_CTL_MAX_DWORDS];
157 memset(¶ms, 0, sizeof(params));
159 params[GUC_CTL_DEVICE_INFO] |=
160 (get_gttype(dev_priv) << GUC_CTL_GTTYPE_SHIFT) |
161 (get_core_family(dev_priv) << GUC_CTL_COREFAMILY_SHIFT);
164 * GuC ARAT increment is 10 ns. GuC default scheduler quantum is one
165 * second. This ARAR is calculated by:
166 * Scheduler-Quantum-in-ns / ARAT-increment-in-ns = 1000000000 / 10
168 params[GUC_CTL_ARAT_HIGH] = 0;
169 params[GUC_CTL_ARAT_LOW] = 100000000;
171 params[GUC_CTL_WA] |= GUC_CTL_WA_UK_BY_DRIVER;
173 params[GUC_CTL_FEATURE] |= GUC_CTL_DISABLE_SCHEDULER |
174 GUC_CTL_VCS2_ENABLED;
176 if (i915.guc_log_level >= 0) {
177 params[GUC_CTL_LOG_PARAMS] = guc->log_flags;
178 params[GUC_CTL_DEBUG] =
179 i915.guc_log_level << GUC_LOG_VERBOSITY_SHIFT;
183 u32 ads = (u32)i915_gem_obj_ggtt_offset(guc->ads_obj)
185 params[GUC_CTL_DEBUG] |= ads << GUC_ADS_ADDR_SHIFT;
186 params[GUC_CTL_DEBUG] |= GUC_ADS_ENABLED;
189 /* If GuC submission is enabled, set up additional parameters here */
190 if (i915.enable_guc_submission) {
191 u32 pgs = i915_gem_obj_ggtt_offset(dev_priv->guc.ctx_pool_obj);
192 u32 ctx_in_16 = GUC_MAX_GPU_CONTEXTS / 16;
195 params[GUC_CTL_CTXINFO] = (pgs << GUC_CTL_BASE_ADDR_SHIFT) |
196 (ctx_in_16 << GUC_CTL_CTXNUM_IN16_SHIFT);
198 params[GUC_CTL_FEATURE] |= GUC_CTL_KERNEL_SUBMISSIONS;
200 /* Unmask this bit to enable the GuC's internal scheduler */
201 params[GUC_CTL_FEATURE] &= ~GUC_CTL_DISABLE_SCHEDULER;
204 I915_WRITE(SOFT_SCRATCH(0), 0);
206 for (i = 0; i < GUC_CTL_MAX_DWORDS; i++)
207 I915_WRITE(SOFT_SCRATCH(1 + i), params[i]);
211 * Read the GuC status register (GUC_STATUS) and store it in the
212 * specified location; then return a boolean indicating whether
213 * the value matches either of two values representing completion
214 * of the GuC boot process.
216 * This is used for polling the GuC status in a wait_for()
219 static inline bool guc_ucode_response(struct drm_i915_private *dev_priv,
222 u32 val = I915_READ(GUC_STATUS);
223 u32 uk_val = val & GS_UKERNEL_MASK;
225 return (uk_val == GS_UKERNEL_READY ||
226 ((val & GS_MIA_CORE_STATE) && uk_val == GS_UKERNEL_LAPIC_DONE));
230 * Transfer the firmware image to RAM for execution by the microcontroller.
232 * Architecturally, the DMA engine is bidirectional, and can potentially even
233 * transfer between GTT locations. This functionality is left out of the API
234 * for now as there is no need for it.
236 * Note that GuC needs the CSS header plus uKernel code to be copied by the
237 * DMA engine in one operation, whereas the RSA signature is loaded via MMIO.
239 static int guc_ucode_xfer_dma(struct drm_i915_private *dev_priv)
241 struct intel_guc_fw *guc_fw = &dev_priv->guc.guc_fw;
242 struct drm_i915_gem_object *fw_obj = guc_fw->guc_fw_obj;
243 unsigned long offset;
244 struct sg_table *sg = fw_obj->pages;
245 u32 status, rsa[UOS_RSA_SCRATCH_MAX_COUNT];
248 /* where RSA signature starts */
249 offset = guc_fw->rsa_offset;
251 /* Copy RSA signature from the fw image to HW for verification */
252 sg_pcopy_to_buffer(sg->sgl, sg->nents, rsa, sizeof(rsa), offset);
253 for (i = 0; i < UOS_RSA_SCRATCH_MAX_COUNT; i++)
254 I915_WRITE(UOS_RSA_SCRATCH(i), rsa[i]);
256 /* The header plus uCode will be copied to WOPCM via DMA, excluding any
257 * other components */
258 I915_WRITE(DMA_COPY_SIZE, guc_fw->header_size + guc_fw->ucode_size);
260 /* Set the source address for the new blob */
261 offset = i915_gem_obj_ggtt_offset(fw_obj) + guc_fw->header_offset;
262 I915_WRITE(DMA_ADDR_0_LOW, lower_32_bits(offset));
263 I915_WRITE(DMA_ADDR_0_HIGH, upper_32_bits(offset) & 0xFFFF);
266 * Set the DMA destination. Current uCode expects the code to be
267 * loaded at 8k; locations below this are used for the stack.
269 I915_WRITE(DMA_ADDR_1_LOW, 0x2000);
270 I915_WRITE(DMA_ADDR_1_HIGH, DMA_ADDRESS_SPACE_WOPCM);
272 /* Finally start the DMA */
273 I915_WRITE(DMA_CTRL, _MASKED_BIT_ENABLE(UOS_MOVE | START_DMA));
276 * Wait for the DMA to complete & the GuC to start up.
277 * NB: Docs recommend not using the interrupt for completion.
278 * Measurements indicate this should take no more than 20ms, so a
279 * timeout here indicates that the GuC has failed and is unusable.
280 * (Higher levels of the driver will attempt to fall back to
281 * execlist mode if this happens.)
283 ret = wait_for(guc_ucode_response(dev_priv, &status), 100);
285 DRM_DEBUG_DRIVER("DMA status 0x%x, GuC status 0x%x\n",
286 I915_READ(DMA_CTRL), status);
288 if ((status & GS_BOOTROM_MASK) == GS_BOOTROM_RSA_FAILED) {
289 DRM_ERROR("GuC firmware signature verification failed\n");
293 DRM_DEBUG_DRIVER("returning %d\n", ret);
298 static u32 guc_wopcm_size(struct drm_i915_private *dev_priv)
300 u32 wopcm_size = GUC_WOPCM_TOP;
302 /* On BXT, the top of WOPCM is reserved for RC6 context */
303 if (IS_BROXTON(dev_priv))
304 wopcm_size -= BXT_GUC_WOPCM_RC6_RESERVED;
310 * Load the GuC firmware blob into the MinuteIA.
312 static int guc_ucode_xfer(struct drm_i915_private *dev_priv)
314 struct intel_guc_fw *guc_fw = &dev_priv->guc.guc_fw;
315 struct drm_device *dev = dev_priv->dev;
318 ret = i915_gem_object_set_to_gtt_domain(guc_fw->guc_fw_obj, false);
320 DRM_DEBUG_DRIVER("set-domain failed %d\n", ret);
324 ret = i915_gem_obj_ggtt_pin(guc_fw->guc_fw_obj, 0, 0);
326 DRM_DEBUG_DRIVER("pin failed %d\n", ret);
330 /* Invalidate GuC TLB to let GuC take the latest updates to GTT. */
331 I915_WRITE(GEN8_GTCR, GEN8_GTCR_INVALIDATE);
333 intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
336 I915_WRITE(GUC_WOPCM_SIZE, guc_wopcm_size(dev_priv));
337 I915_WRITE(DMA_GUC_WOPCM_OFFSET, GUC_WOPCM_OFFSET_VALUE);
339 /* Enable MIA caching. GuC clock gating is disabled. */
340 I915_WRITE(GUC_SHIM_CONTROL, GUC_SHIM_CONTROL_VALUE);
342 /* WaDisableMinuteIaClockGating:skl,bxt */
343 if (IS_SKL_REVID(dev, 0, SKL_REVID_B0) ||
344 IS_BXT_REVID(dev, 0, BXT_REVID_A1)) {
345 I915_WRITE(GUC_SHIM_CONTROL, (I915_READ(GUC_SHIM_CONTROL) &
346 ~GUC_ENABLE_MIA_CLOCK_GATING));
349 /* WaC6DisallowByGfxPause*/
350 I915_WRITE(GEN6_GFXPAUSE, 0x30FFF);
353 I915_WRITE(GEN9LP_GT_PM_CONFIG, GT_DOORBELL_ENABLE);
355 I915_WRITE(GEN9_GT_PM_CONFIG, GT_DOORBELL_ENABLE);
358 /* DOP Clock Gating Enable for GuC clocks */
359 I915_WRITE(GEN7_MISCCPCTL, (GEN8_DOP_CLOCK_GATE_GUC_ENABLE |
360 I915_READ(GEN7_MISCCPCTL)));
362 /* allows for 5us before GT can go to RC6 */
363 I915_WRITE(GUC_ARAT_C6DIS, 0x1FF);
366 set_guc_init_params(dev_priv);
368 ret = guc_ucode_xfer_dma(dev_priv);
370 intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
373 * We keep the object pages for reuse during resume. But we can unpin it
374 * now that DMA has completed, so it doesn't continue to take up space.
376 i915_gem_object_ggtt_unpin(guc_fw->guc_fw_obj);
381 static int i915_reset_guc(struct drm_i915_private *dev_priv)
386 ret = intel_guc_reset(dev_priv);
388 DRM_ERROR("GuC reset failed, ret = %d\n", ret);
392 guc_status = I915_READ(GUC_STATUS);
393 WARN(!(guc_status & GS_MIA_IN_RESET),
394 "GuC status: 0x%x, MIA core expected to be in reset\n", guc_status);
400 * intel_guc_setup() - finish preparing the GuC for activity
403 * Called from gem_init_hw() during driver loading and also after a GPU reset.
405 * The main action required here it to load the GuC uCode into the device.
406 * The firmware image should have already been fetched into memory by the
407 * earlier call to intel_guc_init(), so here we need only check that worked,
408 * and then transfer the image to the h/w.
410 * Return: non-zero code on error
412 int intel_guc_setup(struct drm_device *dev)
414 struct drm_i915_private *dev_priv = dev->dev_private;
415 struct intel_guc_fw *guc_fw = &dev_priv->guc.guc_fw;
416 const char *fw_path = guc_fw->guc_fw_path;
417 int retries, ret, err;
419 DRM_DEBUG_DRIVER("GuC fw status: path %s, fetch %s, load %s\n",
421 intel_guc_fw_status_repr(guc_fw->guc_fw_fetch_status),
422 intel_guc_fw_status_repr(guc_fw->guc_fw_load_status));
424 /* Loading forbidden, or no firmware to load? */
425 if (!i915.enable_guc_loading) {
428 } else if (fw_path == NULL || *fw_path == '\0') {
429 if (*fw_path == '\0')
430 DRM_INFO("No GuC firmware known for this platform\n");
435 /* Fetch failed, or already fetched but failed to load? */
436 if (guc_fw->guc_fw_fetch_status != GUC_FIRMWARE_SUCCESS) {
439 } else if (guc_fw->guc_fw_load_status == GUC_FIRMWARE_FAIL) {
444 direct_interrupts_to_host(dev_priv);
446 guc_fw->guc_fw_load_status = GUC_FIRMWARE_PENDING;
448 DRM_DEBUG_DRIVER("GuC fw status: fetch %s, load %s\n",
449 intel_guc_fw_status_repr(guc_fw->guc_fw_fetch_status),
450 intel_guc_fw_status_repr(guc_fw->guc_fw_load_status));
452 err = i915_guc_submission_init(dev);
457 * WaEnableuKernelHeaderValidFix:skl,bxt
458 * For BXT, this is only upto B0 but below WA is required for later
459 * steppings also so this is extended as well.
461 /* WaEnableGuCBootHashCheckNotSet:skl,bxt */
462 for (retries = 3; ; ) {
464 * Always reset the GuC just before (re)loading, so
465 * that the state and timing are fairly predictable
467 err = i915_reset_guc(dev_priv);
469 DRM_ERROR("GuC reset failed: %d\n", err);
473 err = guc_ucode_xfer(dev_priv);
480 DRM_INFO("GuC fw load failed: %d; will reset and "
481 "retry %d more time(s)\n", err, retries);
484 guc_fw->guc_fw_load_status = GUC_FIRMWARE_SUCCESS;
486 DRM_DEBUG_DRIVER("GuC fw status: fetch %s, load %s\n",
487 intel_guc_fw_status_repr(guc_fw->guc_fw_fetch_status),
488 intel_guc_fw_status_repr(guc_fw->guc_fw_load_status));
490 if (i915.enable_guc_submission) {
491 /* The execbuf_client will be recreated. Release it first. */
492 i915_guc_submission_disable(dev);
494 err = i915_guc_submission_enable(dev);
497 direct_interrupts_to_guc(dev_priv);
503 if (guc_fw->guc_fw_load_status == GUC_FIRMWARE_PENDING)
504 guc_fw->guc_fw_load_status = GUC_FIRMWARE_FAIL;
506 direct_interrupts_to_host(dev_priv);
507 i915_guc_submission_disable(dev);
508 i915_guc_submission_fini(dev);
511 * We've failed to load the firmware :(
513 * Decide whether to disable GuC submission and fall back to
514 * execlist mode, and whether to hide the error by returning
515 * zero or to return -EIO, which the caller will treat as a
516 * nonfatal error (i.e. it doesn't prevent driver load, but
517 * marks the GPU as wedged until reset).
519 if (i915.enable_guc_loading > 1) {
521 } else if (i915.enable_guc_submission > 1) {
528 DRM_INFO("GuC firmware load skipped\n");
529 else if (ret == -EIO)
530 DRM_ERROR("GuC firmware load failed: %d\n", err);
532 DRM_INFO("GuC firmware load failed: %d\n", err);
534 if (i915.enable_guc_submission) {
536 DRM_INFO("GuC submission without firmware not supported\n");
538 DRM_INFO("Falling back to execlist mode\n");
540 DRM_ERROR("GuC init failed: %d\n", ret);
542 i915.enable_guc_submission = 0;
547 static void guc_fw_fetch(struct drm_device *dev, struct intel_guc_fw *guc_fw)
549 struct drm_i915_gem_object *obj;
550 const struct firmware *fw;
551 struct guc_css_header *css;
555 DRM_DEBUG_DRIVER("before requesting firmware: GuC fw fetch status %s\n",
556 intel_guc_fw_status_repr(guc_fw->guc_fw_fetch_status));
558 err = request_firmware(&fw, guc_fw->guc_fw_path, &dev->pdev->dev);
564 DRM_DEBUG_DRIVER("fetch GuC fw from %s succeeded, fw %p\n",
565 guc_fw->guc_fw_path, fw);
567 /* Check the size of the blob before examining buffer contents */
568 if (fw->size < sizeof(struct guc_css_header)) {
569 DRM_ERROR("Firmware header is missing\n");
573 css = (struct guc_css_header *)fw->data;
575 /* Firmware bits always start from header */
576 guc_fw->header_offset = 0;
577 guc_fw->header_size = (css->header_size_dw - css->modulus_size_dw -
578 css->key_size_dw - css->exponent_size_dw) * sizeof(u32);
580 if (guc_fw->header_size != sizeof(struct guc_css_header)) {
581 DRM_ERROR("CSS header definition mismatch\n");
586 guc_fw->ucode_offset = guc_fw->header_offset + guc_fw->header_size;
587 guc_fw->ucode_size = (css->size_dw - css->header_size_dw) * sizeof(u32);
590 if (css->key_size_dw != UOS_RSA_SCRATCH_MAX_COUNT) {
591 DRM_ERROR("RSA key size is bad\n");
594 guc_fw->rsa_offset = guc_fw->ucode_offset + guc_fw->ucode_size;
595 guc_fw->rsa_size = css->key_size_dw * sizeof(u32);
597 /* At least, it should have header, uCode and RSA. Size of all three. */
598 size = guc_fw->header_size + guc_fw->ucode_size + guc_fw->rsa_size;
599 if (fw->size < size) {
600 DRM_ERROR("Missing firmware components\n");
604 /* Header and uCode will be loaded to WOPCM. Size of the two. */
605 size = guc_fw->header_size + guc_fw->ucode_size;
606 if (size > guc_wopcm_size(dev->dev_private)) {
607 DRM_ERROR("Firmware is too large to fit in WOPCM\n");
612 * The GuC firmware image has the version number embedded at a well-known
613 * offset within the firmware blob; note that major / minor version are
614 * TWO bytes each (i.e. u16), although all pointers and offsets are defined
615 * in terms of bytes (u8).
617 guc_fw->guc_fw_major_found = css->guc_sw_version >> 16;
618 guc_fw->guc_fw_minor_found = css->guc_sw_version & 0xFFFF;
620 if (guc_fw->guc_fw_major_found != guc_fw->guc_fw_major_wanted ||
621 guc_fw->guc_fw_minor_found < guc_fw->guc_fw_minor_wanted) {
622 DRM_ERROR("GuC firmware version %d.%d, required %d.%d\n",
623 guc_fw->guc_fw_major_found, guc_fw->guc_fw_minor_found,
624 guc_fw->guc_fw_major_wanted, guc_fw->guc_fw_minor_wanted);
629 DRM_DEBUG_DRIVER("firmware version %d.%d OK (minimum %d.%d)\n",
630 guc_fw->guc_fw_major_found, guc_fw->guc_fw_minor_found,
631 guc_fw->guc_fw_major_wanted, guc_fw->guc_fw_minor_wanted);
633 mutex_lock(&dev->struct_mutex);
634 obj = i915_gem_object_create_from_data(dev, fw->data, fw->size);
635 mutex_unlock(&dev->struct_mutex);
636 if (IS_ERR_OR_NULL(obj)) {
637 err = obj ? PTR_ERR(obj) : -ENOMEM;
641 guc_fw->guc_fw_obj = obj;
642 guc_fw->guc_fw_size = fw->size;
644 DRM_DEBUG_DRIVER("GuC fw fetch status SUCCESS, obj %p\n",
647 release_firmware(fw);
648 guc_fw->guc_fw_fetch_status = GUC_FIRMWARE_SUCCESS;
652 DRM_DEBUG_DRIVER("GuC fw fetch status FAIL; err %d, fw %p, obj %p\n",
653 err, fw, guc_fw->guc_fw_obj);
654 DRM_ERROR("Failed to fetch GuC firmware from %s (error %d)\n",
655 guc_fw->guc_fw_path, err);
657 mutex_lock(&dev->struct_mutex);
658 obj = guc_fw->guc_fw_obj;
660 drm_gem_object_unreference(&obj->base);
661 guc_fw->guc_fw_obj = NULL;
662 mutex_unlock(&dev->struct_mutex);
664 release_firmware(fw); /* OK even if fw is NULL */
665 guc_fw->guc_fw_fetch_status = GUC_FIRMWARE_FAIL;
669 * intel_guc_init() - define parameters and fetch firmware
672 * Called early during driver load, but after GEM is initialised.
674 * The firmware will be transferred to the GuC's memory later,
675 * when intel_guc_setup() is called.
677 void intel_guc_init(struct drm_device *dev)
679 struct drm_i915_private *dev_priv = dev->dev_private;
680 struct intel_guc_fw *guc_fw = &dev_priv->guc.guc_fw;
683 /* A negative value means "use platform default" */
684 if (i915.enable_guc_loading < 0)
685 i915.enable_guc_loading = HAS_GUC_UCODE(dev);
686 if (i915.enable_guc_submission < 0)
687 i915.enable_guc_submission = HAS_GUC_SCHED(dev);
689 if (!HAS_GUC_UCODE(dev)) {
691 } else if (IS_SKYLAKE(dev)) {
692 fw_path = I915_SKL_GUC_UCODE;
693 guc_fw->guc_fw_major_wanted = 6;
694 guc_fw->guc_fw_minor_wanted = 1;
695 } else if (IS_BROXTON(dev)) {
696 fw_path = I915_BXT_GUC_UCODE;
697 guc_fw->guc_fw_major_wanted = 8;
698 guc_fw->guc_fw_minor_wanted = 7;
700 fw_path = ""; /* unknown device */
703 guc_fw->guc_dev = dev;
704 guc_fw->guc_fw_path = fw_path;
705 guc_fw->guc_fw_fetch_status = GUC_FIRMWARE_NONE;
706 guc_fw->guc_fw_load_status = GUC_FIRMWARE_NONE;
708 /* Early (and silent) return if GuC loading is disabled */
709 if (!i915.enable_guc_loading)
713 if (*fw_path == '\0')
716 guc_fw->guc_fw_fetch_status = GUC_FIRMWARE_PENDING;
717 DRM_DEBUG_DRIVER("GuC firmware pending, path %s\n", fw_path);
718 guc_fw_fetch(dev, guc_fw);
719 /* status must now be FAIL or SUCCESS */
723 * intel_guc_fini() - clean up all allocated resources
726 void intel_guc_fini(struct drm_device *dev)
728 struct drm_i915_private *dev_priv = dev->dev_private;
729 struct intel_guc_fw *guc_fw = &dev_priv->guc.guc_fw;
731 mutex_lock(&dev->struct_mutex);
732 direct_interrupts_to_host(dev_priv);
733 i915_guc_submission_disable(dev);
734 i915_guc_submission_fini(dev);
736 if (guc_fw->guc_fw_obj)
737 drm_gem_object_unreference(&guc_fw->guc_fw_obj->base);
738 guc_fw->guc_fw_obj = NULL;
739 mutex_unlock(&dev->struct_mutex);
741 guc_fw->guc_fw_fetch_status = GUC_FIRMWARE_NONE;