cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/i915/intel_guc_loader.c

/*
 * Copyright © 2014 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 * Authors:
 *    Vinit Azad <vinit.azad@intel.com>
 *    Ben Widawsky <ben@bwidawsk.net>
 *    Dave Gordon <david.s.gordon@intel.com>
 *    Alex Dai <yu.dai@intel.com>
 */
#include <linux/firmware.h>
#include "i915_drv.h"
#include "intel_uc.h"

/**
 * DOC: GuC-specific firmware loader
 *
 * intel_guc:
 * Top level structure of guc. It handles firmware loading and manages client
 * pool and doorbells. intel_guc owns a i915_guc_client to replace the legacy
 * ExecList submission.
 *
 * Firmware versioning:
 * The firmware build process will generate a version header file with major and
 * minor version defined. The versions are built into CSS header of firmware.
 * i915 kernel driver set the minimal firmware version required per platform.
 * The firmware installation package will install (symbolic link) proper version
 * of firmware.
 *
 * GuC address space:
 * GuC does not allow any gfx GGTT address that falls into range [0, WOPCM_TOP),
 * which is reserved for Boot ROM, SRAM and WOPCM. Currently this top address is
 * 512K. In order to exclude 0-512K address space from GGTT, all gfx objects
 * used by GuC is pinned with PIN_OFFSET_BIAS along with size of WOPCM.
 *
 */


#define SKL_FW_MAJOR 6

#define SKL_FW_MINOR 1


#define BXT_FW_MAJOR 8

#define BXT_FW_MINOR 7


#define KBL_FW_MAJOR 9

#define KBL_FW_MINOR 14


#define GUC_FW_PATH(platform, major, minor) \
       "i915/" __stringify(platform) "_guc_ver" __stringify(major) "_" __stringify(minor) ".bin"


#define I915_SKL_GUC_UCODE GUC_FW_PATH(skl, SKL_FW_MAJOR, SKL_FW_MINOR)

MODULE_FIRMWARE(I915_SKL_GUC_UCODE);


#define I915_BXT_GUC_UCODE GUC_FW_PATH(bxt, BXT_FW_MAJOR, BXT_FW_MINOR)

MODULE_FIRMWARE(I915_BXT_GUC_UCODE);


#define I915_KBL_GUC_UCODE GUC_FW_PATH(kbl, KBL_FW_MAJOR, KBL_FW_MINOR)

MODULE_FIRMWARE(I915_KBL_GUC_UCODE);

/* User-friendly representation of an enum */

const char *intel_uc_fw_status_repr(enum intel_uc_fw_status status) { switch (status) { case INTEL_UC_FIRMWARE_FAIL: return "FAIL"; case INTEL_UC_FIRMWARE_NONE: return "NONE"; case INTEL_UC_FIRMWARE_PENDING: return "PENDING"; case INTEL_UC_FIRMWARE_SUCCESS: return "SUCCESS"; default: return "UNKNOWN!"; } }

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Alex Dai3986.67%150.00%
Anusha Srivatsa613.33%150.00%
Total45100.00%2100.00%

;
static void guc_interrupts_release(struct drm_i915_private *dev_priv) { struct intel_engine_cs *engine; enum intel_engine_id id; int irqs; /* tell all command streamers NOT to forward interrupts or vblank to GuC */ irqs = _MASKED_FIELD(GFX_FORWARD_VBLANK_MASK, GFX_FORWARD_VBLANK_NEVER); irqs |= _MASKED_BIT_DISABLE(GFX_INTERRUPT_STEERING); for_each_engine(engine, dev_priv, id) I915_WRITE(RING_MODE_GEN7(engine), irqs); /* route all GT interrupts to the host */ I915_WRITE(GUC_BCS_RCS_IER, 0); I915_WRITE(GUC_VCS2_VCS1_IER, 0); I915_WRITE(GUC_WD_VECS_IER, 0); }

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Dave Gordon7087.50%350.00%
Akash Goel67.50%116.67%
Tvrtko A. Ursulin45.00%233.33%
Total80100.00%6100.00%


static void guc_interrupts_capture(struct drm_i915_private *dev_priv) { struct intel_engine_cs *engine; enum intel_engine_id id; int irqs; u32 tmp; /* tell all command streamers to forward interrupts (but not vblank) to GuC */ irqs = _MASKED_BIT_ENABLE(GFX_INTERRUPT_STEERING); for_each_engine(engine, dev_priv, id) I915_WRITE(RING_MODE_GEN7(engine), irqs); /* route USER_INTERRUPT to Host, all others are sent to GuC. */ irqs = GT_RENDER_USER_INTERRUPT << GEN8_RCS_IRQ_SHIFT | GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT; /* These three registers have the same bit definitions */ I915_WRITE(GUC_BCS_RCS_IER, ~irqs); I915_WRITE(GUC_VCS2_VCS1_IER, ~irqs); I915_WRITE(GUC_WD_VECS_IER, ~irqs); /* * The REDIRECT_TO_GUC bit of the PMINTRMSK register directs all * (unmasked) PM interrupts to the GuC. All other bits of this * register *disable* generation of a specific interrupt. * * 'pm_intr_keep' indicates bits that are NOT to be set when * writing to the PM interrupt mask register, i.e. interrupts * that must not be disabled. * * If the GuC is handling these interrupts, then we must not let * the PM code disable ANY interrupt that the GuC is expecting. * So for each ENABLED (0) bit in this register, we must SET the * bit in pm_intr_keep so that it's left enabled for the GuC. * * OTOH the REDIRECT_TO_GUC bit is initially SET in pm_intr_keep * (so interrupts go to the DISPLAY unit at first); but here we * need to CLEAR that bit, which will result in the register bit * being left SET! */ tmp = I915_READ(GEN6_PMINTRMSK); if (tmp & GEN8_PMINTR_REDIRECT_TO_GUC) { dev_priv->rps.pm_intr_keep |= ~tmp; dev_priv->rps.pm_intr_keep &= ~GEN8_PMINTR_REDIRECT_TO_GUC; } }

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Dave Gordon7863.93%450.00%
Sagar Arun Kamble3427.87%112.50%
Akash Goel64.92%112.50%
Tvrtko A. Ursulin43.28%225.00%
Total122100.00%8100.00%


static u32 get_gttype(struct drm_i915_private *dev_priv) { /* XXX: GT type based on PCI device ID? field seems unused by fw */ return 0; }

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Alex Dai15100.00%1100.00%
Total15100.00%1100.00%


static u32 get_core_family(struct drm_i915_private *dev_priv) { u32 gen = INTEL_GEN(dev_priv); switch (gen) { case 9: return GFXCORE_FAMILY_GEN9; default: WARN(1, "GEN%d does not support GuC operation!\n", gen); return GFXCORE_FAMILY_UNKNOWN; } }

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PersonTokensPropCommitsCommitProp
Alex Dai3170.45%150.00%
Dave Gordon1329.55%150.00%
Total44100.00%2100.00%

/* * Initialise the GuC parameter block before starting the firmware * transfer. These parameters are read by the firmware on startup * and cannot be changed thereafter. */
static void guc_params_init(struct drm_i915_private *dev_priv) { struct intel_guc *guc = &dev_priv->guc; u32 params[GUC_CTL_MAX_DWORDS]; int i; memset(&params, 0, sizeof(params)); params[GUC_CTL_DEVICE_INFO] |= (get_gttype(dev_priv) << GUC_CTL_GTTYPE_SHIFT) | (get_core_family(dev_priv) << GUC_CTL_COREFAMILY_SHIFT); /* * GuC ARAT increment is 10 ns. GuC default scheduler quantum is one * second. This ARAR is calculated by: * Scheduler-Quantum-in-ns / ARAT-increment-in-ns = 1000000000 / 10 */ params[GUC_CTL_ARAT_HIGH] = 0; params[GUC_CTL_ARAT_LOW] = 100000000; params[GUC_CTL_WA] |= GUC_CTL_WA_UK_BY_DRIVER; params[GUC_CTL_FEATURE] |= GUC_CTL_DISABLE_SCHEDULER | GUC_CTL_VCS2_ENABLED; params[GUC_CTL_LOG_PARAMS] = guc->log.flags; if (i915.guc_log_level >= 0) { params[GUC_CTL_DEBUG] = i915.guc_log_level << GUC_LOG_VERBOSITY_SHIFT; } else params[GUC_CTL_DEBUG] = GUC_LOG_DISABLED; if (guc->ads_vma) { u32 ads = guc_ggtt_offset(guc->ads_vma) >> PAGE_SHIFT; params[GUC_CTL_DEBUG] |= ads << GUC_ADS_ADDR_SHIFT; params[GUC_CTL_DEBUG] |= GUC_ADS_ENABLED; } /* If GuC submission is enabled, set up additional parameters here */ if (i915.enable_guc_submission) { u32 pgs = guc_ggtt_offset(dev_priv->guc.ctx_pool_vma); u32 ctx_in_16 = GUC_MAX_GPU_CONTEXTS / 16; pgs >>= PAGE_SHIFT; params[GUC_CTL_CTXINFO] = (pgs << GUC_CTL_BASE_ADDR_SHIFT) | (ctx_in_16 << GUC_CTL_CTXNUM_IN16_SHIFT); params[GUC_CTL_FEATURE] |= GUC_CTL_KERNEL_SUBMISSIONS; /* Unmask this bit to enable the GuC's internal scheduler */ params[GUC_CTL_FEATURE] &= ~GUC_CTL_DISABLE_SCHEDULER; } I915_WRITE(SOFT_SCRATCH(0), 0); for (i = 0; i < GUC_CTL_MAX_DWORDS; i++) I915_WRITE(SOFT_SCRATCH(1 + i), params[i]); }

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PersonTokensPropCommitsCommitProp
Alex Dai24689.13%333.33%
Sagar Arun Kamble176.16%111.11%
Chris Wilson93.26%333.33%
Akash Goel31.09%111.11%
Dave Gordon10.36%111.11%
Total276100.00%9100.00%

/* * Read the GuC status register (GUC_STATUS) and store it in the * specified location; then return a boolean indicating whether * the value matches either of two values representing completion * of the GuC boot process. * * This is used for polling the GuC status in a wait_for() * loop below. */
static inline bool guc_ucode_response(struct drm_i915_private *dev_priv, u32 *status) { u32 val = I915_READ(GUC_STATUS); u32 uk_val = val & GS_UKERNEL_MASK; *status = val; return (uk_val == GS_UKERNEL_READY || ((val & GS_MIA_CORE_STATE) && uk_val == GS_UKERNEL_LAPIC_DONE)); }

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PersonTokensPropCommitsCommitProp
Alex Dai55100.00%2100.00%
Total55100.00%2100.00%

/* * Transfer the firmware image to RAM for execution by the microcontroller. * * Architecturally, the DMA engine is bidirectional, and can potentially even * transfer between GTT locations. This functionality is left out of the API * for now as there is no need for it. * * Note that GuC needs the CSS header plus uKernel code to be copied by the * DMA engine in one operation, whereas the RSA signature is loaded via MMIO. */
static int guc_ucode_xfer_dma(struct drm_i915_private *dev_priv, struct i915_vma *vma) { struct intel_uc_fw *guc_fw = &dev_priv->guc.fw; unsigned long offset; struct sg_table *sg = vma->pages; u32 status, rsa[UOS_RSA_SCRATCH_MAX_COUNT]; int i, ret = 0; /* where RSA signature starts */ offset = guc_fw->rsa_offset; /* Copy RSA signature from the fw image to HW for verification */ sg_pcopy_to_buffer(sg->sgl, sg->nents, rsa, sizeof(rsa), offset); for (i = 0; i < UOS_RSA_SCRATCH_MAX_COUNT; i++) I915_WRITE(UOS_RSA_SCRATCH(i), rsa[i]); /* The header plus uCode will be copied to WOPCM via DMA, excluding any * other components */ I915_WRITE(DMA_COPY_SIZE, guc_fw->header_size + guc_fw->ucode_size); /* Set the source address for the new blob */ offset = guc_ggtt_offset(vma) + guc_fw->header_offset; I915_WRITE(DMA_ADDR_0_LOW, lower_32_bits(offset)); I915_WRITE(DMA_ADDR_0_HIGH, upper_32_bits(offset) & 0xFFFF); /* * Set the DMA destination. Current uCode expects the code to be * loaded at 8k; locations below this are used for the stack. */ I915_WRITE(DMA_ADDR_1_LOW, 0x2000); I915_WRITE(DMA_ADDR_1_HIGH, DMA_ADDRESS_SPACE_WOPCM); /* Finally start the DMA */ I915_WRITE(DMA_CTRL, _MASKED_BIT_ENABLE(UOS_MOVE | START_DMA)); /* * Wait for the DMA to complete & the GuC to start up. * NB: Docs recommend not using the interrupt for completion. * Measurements indicate this should take no more than 20ms, so a * timeout here indicates that the GuC has failed and is unusable. * (Higher levels of the driver will attempt to fall back to * execlist mode if this happens.) */ ret = wait_for(guc_ucode_response(dev_priv, &status), 100); DRM_DEBUG_DRIVER("DMA status 0x%x, GuC status 0x%x\n", I915_READ(DMA_CTRL), status); if ((status & GS_BOOTROM_MASK) == GS_BOOTROM_RSA_FAILED) { DRM_ERROR("GuC firmware signature verification failed\n"); ret = -ENOEXEC; } DRM_DEBUG_DRIVER("returning %d\n", ret); return ret; }

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PersonTokensPropCommitsCommitProp
Alex Dai23093.50%225.00%
Chris Wilson104.07%337.50%
Ville Syrjälä20.81%112.50%
Anusha Srivatsa20.81%112.50%
Tvrtko A. Ursulin20.81%112.50%
Total246100.00%8100.00%


u32 intel_guc_wopcm_size(struct drm_i915_private *dev_priv) { u32 wopcm_size = GUC_WOPCM_TOP; /* On BXT, the top of WOPCM is reserved for RC6 context */ if (IS_GEN9_LP(dev_priv)) wopcm_size -= BXT_GUC_WOPCM_RC6_RESERVED; return wopcm_size; }

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PersonTokensPropCommitsCommitProp
Peter Antoine2893.33%133.33%
Anusha Srivatsa13.33%133.33%
Michel Thierry13.33%133.33%
Total30100.00%3100.00%

/* * Load the GuC firmware blob into the MinuteIA. */
static int guc_ucode_xfer(struct drm_i915_private *dev_priv) { struct intel_uc_fw *guc_fw = &dev_priv->guc.fw; struct i915_vma *vma; int ret; ret = i915_gem_object_set_to_gtt_domain(guc_fw->obj, false); if (ret) { DRM_DEBUG_DRIVER("set-domain failed %d\n", ret); return ret; } vma = i915_gem_object_ggtt_pin(guc_fw->obj, NULL, 0, 0, PIN_OFFSET_BIAS | GUC_WOPCM_TOP); if (IS_ERR(vma)) { DRM_DEBUG_DRIVER("pin failed %d\n", (int)PTR_ERR(vma)); return PTR_ERR(vma); } intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL); /* init WOPCM */ I915_WRITE(GUC_WOPCM_SIZE, intel_guc_wopcm_size(dev_priv)); I915_WRITE(DMA_GUC_WOPCM_OFFSET, GUC_WOPCM_OFFSET_VALUE); /* Enable MIA caching. GuC clock gating is disabled. */ I915_WRITE(GUC_SHIM_CONTROL, GUC_SHIM_CONTROL_VALUE); /* WaDisableMinuteIaClockGating:bxt */ if (IS_BXT_REVID(dev_priv, 0, BXT_REVID_A1)) { I915_WRITE(GUC_SHIM_CONTROL, (I915_READ(GUC_SHIM_CONTROL) & ~GUC_ENABLE_MIA_CLOCK_GATING)); } /* WaC6DisallowByGfxPause:bxt */ if (IS_BXT_REVID(dev_priv, 0, BXT_REVID_B0)) I915_WRITE(GEN6_GFXPAUSE, 0x30FFF); if (IS_GEN9_LP(dev_priv)) I915_WRITE(GEN9LP_GT_PM_CONFIG, GT_DOORBELL_ENABLE); else I915_WRITE(GEN9_GT_PM_CONFIG, GT_DOORBELL_ENABLE); if (IS_GEN9(dev_priv)) { /* DOP Clock Gating Enable for GuC clocks */ I915_WRITE(GEN7_MISCCPCTL, (GEN8_DOP_CLOCK_GATE_GUC_ENABLE | I915_READ(GEN7_MISCCPCTL))); /* allows for 5us (in 10ns units) before GT can go to RC6 */ I915_WRITE(GUC_ARAT_C6DIS, 0x1FF); } guc_params_init(dev_priv); ret = guc_ucode_xfer_dma(dev_priv, vma); intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL); /* * We keep the object pages for reuse during resume. But we can unpin it * now that DMA has completed, so it doesn't continue to take up space. */ i915_vma_unpin(vma); return ret; }

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Alex Dai18468.15%15.88%
Chris Wilson2910.74%211.76%
Nick Hoath217.78%15.88%
Tim Gore114.07%211.76%
Jani Nikula72.59%317.65%
Anusha Srivatsa51.85%211.76%
Tvrtko A. Ursulin41.48%211.76%
Michał Winiarski31.11%15.88%
Peter Antoine31.11%15.88%
Dave Gordon20.74%15.88%
Michel Thierry10.37%15.88%
Total270100.00%17100.00%


static int guc_hw_reset(struct drm_i915_private *dev_priv) { int ret; u32 guc_status; ret = intel_guc_reset(dev_priv); if (ret) { DRM_ERROR("GuC reset failed, ret = %d\n", ret); return ret; } guc_status = I915_READ(GUC_STATUS); WARN(!(guc_status & GS_MIA_IN_RESET), "GuC status: 0x%x, MIA core expected to be in reset\n", guc_status); return ret; }

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Arun Siluvery6398.44%150.00%
Dave Gordon11.56%150.00%
Total64100.00%2100.00%

/** * intel_guc_setup() - finish preparing the GuC for activity * @dev_priv: i915 device private * * Called from gem_init_hw() during driver loading and also after a GPU reset. * * The main action required here it to load the GuC uCode into the device. * The firmware image should have already been fetched into memory by the * earlier call to intel_guc_init(), so here we need only check that worked, * and then transfer the image to the h/w. * * Return: non-zero code on error */
int intel_guc_setup(struct drm_i915_private *dev_priv) { struct intel_uc_fw *guc_fw = &dev_priv->guc.fw; const char *fw_path = guc_fw->path; int retries, ret, err; DRM_DEBUG_DRIVER("GuC fw status: path %s, fetch %s, load %s\n", fw_path, intel_uc_fw_status_repr(guc_fw->fetch_status), intel_uc_fw_status_repr(guc_fw->load_status)); /* Loading forbidden, or no firmware to load? */ if (!i915.enable_guc_loading) { err = 0; goto fail; } else if (fw_path == NULL) { /* Device is known to have no uCode (e.g. no GuC) */ err = -ENXIO; goto fail; } else if (*fw_path == '\0') { /* Device has a GuC but we don't know what f/w to load? */ WARN(1, "No GuC firmware known for this platform!\n"); err = -ENODEV; goto fail; } /* Fetch failed, or already fetched but failed to load? */ if (guc_fw->fetch_status != INTEL_UC_FIRMWARE_SUCCESS) { err = -EIO; goto fail; } else if (guc_fw->load_status == INTEL_UC_FIRMWARE_FAIL) { err = -ENOEXEC; goto fail; } guc_interrupts_release(dev_priv); gen9_reset_guc_interrupts(dev_priv); /* We need to notify the guc whenever we change the GGTT */ i915_ggtt_enable_guc(dev_priv); guc_fw->load_status = INTEL_UC_FIRMWARE_PENDING; DRM_DEBUG_DRIVER("GuC fw status: fetch %s, load %s\n", intel_uc_fw_status_repr(guc_fw->fetch_status), intel_uc_fw_status_repr(guc_fw->load_status)); err = i915_guc_submission_init(dev_priv); if (err) goto fail; /* * WaEnableuKernelHeaderValidFix:skl,bxt * For BXT, this is only upto B0 but below WA is required for later * steppings also so this is extended as well. */ /* WaEnableGuCBootHashCheckNotSet:skl,bxt */ for (retries = 3; ; ) { /* * Always reset the GuC just before (re)loading, so * that the state and timing are fairly predictable */ err = guc_hw_reset(dev_priv); if (err) goto fail; intel_huc_load(dev_priv); err = guc_ucode_xfer(dev_priv); if (!err) break; if (--retries == 0) goto fail; DRM_INFO("GuC fw load failed: %d; will reset and " "retry %d more time(s)\n", err, retries); } guc_fw->load_status = INTEL_UC_FIRMWARE_SUCCESS; DRM_DEBUG_DRIVER("GuC fw status: fetch %s, load %s\n", intel_uc_fw_status_repr(guc_fw->fetch_status), intel_uc_fw_status_repr(guc_fw->load_status)); intel_guc_auth_huc(dev_priv); if (i915.enable_guc_submission) { if (i915.guc_log_level >= 0) gen9_enable_guc_interrupts(dev_priv); err = i915_guc_submission_enable(dev_priv); if (err) goto fail; guc_interrupts_capture(dev_priv); } return 0; fail: if (guc_fw->load_status == INTEL_UC_FIRMWARE_PENDING) guc_fw->load_status = INTEL_UC_FIRMWARE_FAIL; guc_interrupts_release(dev_priv); i915_guc_submission_disable(dev_priv); i915_guc_submission_fini(dev_priv); i915_ggtt_disable_guc(dev_priv); /* * We've failed to load the firmware :( * * Decide whether to disable GuC submission and fall back to * execlist mode, and whether to hide the error by returning * zero or to return -EIO, which the caller will treat as a * nonfatal error (i.e. it doesn't prevent driver load, but * marks the GPU as wedged until reset). */ if (i915.enable_guc_loading > 1) { ret = -EIO; } else if (i915.enable_guc_submission > 1) { ret = -EIO; } else { ret = 0; } if (err == 0 && !HAS_GUC_UCODE(dev_priv)) ; /* Don't mention the GuC! */ else if (err == 0) DRM_INFO("GuC firmware load skipped\n"); else if (ret != -EIO) DRM_NOTE("GuC firmware load failed: %d\n", err); else DRM_WARN("GuC firmware load failed: %d\n", err); if (i915.enable_guc_submission) { if (fw_path == NULL) DRM_INFO("GuC submission without firmware not supported\n"); if (ret == 0) DRM_NOTE("Falling back from GuC submission to execlist mode\n"); else DRM_ERROR("GuC init failed: %d\n", ret); } i915.enable_guc_submission = 0; return ret; }

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Dave Gordon29456.32%1047.62%
Alex Dai13626.05%314.29%
Anusha Srivatsa377.09%314.29%
Arun Siluvery234.41%14.76%
Sagar Arun Kamble183.45%14.76%
Chris Wilson112.11%14.76%
Tvrtko A. Ursulin30.57%29.52%
Total522100.00%21100.00%


void intel_uc_fw_fetch(struct drm_i915_private *dev_priv, struct intel_uc_fw *uc_fw) { struct pci_dev *pdev = dev_priv->drm.pdev; struct drm_i915_gem_object *obj; const struct firmware *fw = NULL; struct uc_css_header *css; size_t size; int err; DRM_DEBUG_DRIVER("before requesting firmware: uC fw fetch status %s\n", intel_uc_fw_status_repr(uc_fw->fetch_status)); err = request_firmware(&fw, uc_fw->path, &pdev->dev); if (err) goto fail; if (!fw) goto fail; DRM_DEBUG_DRIVER("fetch uC fw from %s succeeded, fw %p\n", uc_fw->path, fw); /* Check the size of the blob before examining buffer contents */ if (fw->size < sizeof(struct uc_css_header)) { DRM_NOTE("Firmware header is missing\n"); goto fail; } css = (struct uc_css_header *)fw->data; /* Firmware bits always start from header */ uc_fw->header_offset = 0; uc_fw->header_size = (css->header_size_dw - css->modulus_size_dw - css->key_size_dw - css->exponent_size_dw) * sizeof(u32); if (uc_fw->header_size != sizeof(struct uc_css_header)) { DRM_NOTE("CSS header definition mismatch\n"); goto fail; } /* then, uCode */ uc_fw->ucode_offset = uc_fw->header_offset + uc_fw->header_size; uc_fw->ucode_size = (css->size_dw - css->header_size_dw) * sizeof(u32); /* now RSA */ if (css->key_size_dw != UOS_RSA_SCRATCH_MAX_COUNT) { DRM_NOTE("RSA key size is bad\n"); goto fail; } uc_fw->rsa_offset = uc_fw->ucode_offset + uc_fw->ucode_size; uc_fw->rsa_size = css->key_size_dw * sizeof(u32); /* At least, it should have header, uCode and RSA. Size of all three. */ size = uc_fw->header_size + uc_fw->ucode_size + uc_fw->rsa_size; if (fw->size < size) { DRM_NOTE("Missing firmware components\n"); goto fail; } /* * The GuC firmware image has the version number embedded at a well-known * offset within the firmware blob; note that major / minor version are * TWO bytes each (i.e. u16), although all pointers and offsets are defined * in terms of bytes (u8). */ switch (uc_fw->fw) { case INTEL_UC_FW_TYPE_GUC: /* Header and uCode will be loaded to WOPCM. Size of the two. */ size = uc_fw->header_size + uc_fw->ucode_size; /* Top 32k of WOPCM is reserved (8K stack + 24k RC6 context). */ if (size > intel_guc_wopcm_size(dev_priv)) { DRM_ERROR("Firmware is too large to fit in WOPCM\n"); goto fail; } uc_fw->major_ver_found = css->guc.sw_version >> 16; uc_fw->minor_ver_found = css->guc.sw_version & 0xFFFF; break; case INTEL_UC_FW_TYPE_HUC: uc_fw->major_ver_found = css->huc.sw_version >> 16; uc_fw->minor_ver_found = css->huc.sw_version & 0xFFFF; break; default: DRM_ERROR("Unknown firmware type %d\n", uc_fw->fw); err = -ENOEXEC; goto fail; } if (uc_fw->major_ver_found != uc_fw->major_ver_wanted || uc_fw->minor_ver_found < uc_fw->minor_ver_wanted) { DRM_NOTE("uC firmware version %d.%d, required %d.%d\n", uc_fw->major_ver_found, uc_fw->minor_ver_found, uc_fw->major_ver_wanted, uc_fw->minor_ver_wanted); err = -ENOEXEC; goto fail; } DRM_DEBUG_DRIVER("firmware version %d.%d OK (minimum %d.%d)\n", uc_fw->major_ver_found, uc_fw->minor_ver_found, uc_fw->major_ver_wanted, uc_fw->minor_ver_wanted); mutex_lock(&dev_priv->drm.struct_mutex); obj = i915_gem_object_create_from_data(dev_priv, fw->data, fw->size); mutex_unlock(&dev_priv->drm.struct_mutex); if (IS_ERR_OR_NULL(obj)) { err = obj ? PTR_ERR(obj) : -ENOMEM; goto fail; } uc_fw->obj = obj; uc_fw->size = fw->size; DRM_DEBUG_DRIVER("uC fw fetch status SUCCESS, obj %p\n", uc_fw->obj); release_firmware(fw); uc_fw->fetch_status = INTEL_UC_FIRMWARE_SUCCESS; return; fail: DRM_WARN("Failed to fetch valid uC firmware from %s (error %d)\n", uc_fw->path, err); DRM_DEBUG_DRIVER("uC fw fetch status FAIL; err %d, fw %p, obj %p\n", err, fw, uc_fw->obj); mutex_lock(&dev_priv->drm.struct_mutex); obj = uc_fw->obj; if (obj) i915_gem_object_put(obj); uc_fw->obj = NULL; mutex_unlock(&dev_priv->drm.struct_mutex); release_firmware(fw); /* OK even if fw is NULL */ uc_fw->fetch_status = INTEL_UC_FIRMWARE_FAIL; }

Contributors

PersonTokensPropCommitsCommitProp
Alex Dai45068.08%321.43%
Anusha Srivatsa15223.00%321.43%
Tvrtko A. Ursulin192.87%214.29%
Daniel Stone142.12%17.14%
Dave Gordon131.97%17.14%
David Weinehall81.21%17.14%
Jérémy Lefaure20.30%17.14%
Peter Antoine20.30%17.14%
Chris Wilson10.15%17.14%
Total661100.00%14100.00%

/** * intel_guc_init() - define parameters and fetch firmware * @dev_priv: i915 device private * * Called early during driver load, but after GEM is initialised. * * The firmware will be transferred to the GuC's memory later, * when intel_guc_setup() is called. */
void intel_guc_init(struct drm_i915_private *dev_priv) { struct intel_uc_fw *guc_fw = &dev_priv->guc.fw; const char *fw_path; if (!HAS_GUC(dev_priv)) { i915.enable_guc_loading = 0; i915.enable_guc_submission = 0; } else { /* A negative value means "use platform default" */ if (i915.enable_guc_loading < 0) i915.enable_guc_loading = HAS_GUC_UCODE(dev_priv); if (i915.enable_guc_submission < 0) i915.enable_guc_submission = HAS_GUC_SCHED(dev_priv); } if (!HAS_GUC_UCODE(dev_priv)) { fw_path = NULL; } else if (IS_SKYLAKE(dev_priv)) { fw_path = I915_SKL_GUC_UCODE; guc_fw->major_ver_wanted = SKL_FW_MAJOR; guc_fw->minor_ver_wanted = SKL_FW_MINOR; } else if (IS_BROXTON(dev_priv)) { fw_path = I915_BXT_GUC_UCODE; guc_fw->major_ver_wanted = BXT_FW_MAJOR; guc_fw->minor_ver_wanted = BXT_FW_MINOR; } else if (IS_KABYLAKE(dev_priv)) { fw_path = I915_KBL_GUC_UCODE; guc_fw->major_ver_wanted = KBL_FW_MAJOR; guc_fw->minor_ver_wanted = KBL_FW_MINOR; } else { fw_path = ""; /* unknown device */ } guc_fw->path = fw_path; guc_fw->fetch_status = INTEL_UC_FIRMWARE_NONE; guc_fw->load_status = INTEL_UC_FIRMWARE_NONE; /* Early (and silent) return if GuC loading is disabled */ if (!i915.enable_guc_loading) return; if (fw_path == NULL) return; if (*fw_path == '\0') return; guc_fw->fetch_status = INTEL_UC_FIRMWARE_PENDING; DRM_DEBUG_DRIVER("GuC firmware pending, path %s\n", fw_path); intel_uc_fw_fetch(dev_priv, guc_fw); /* status must now be FAIL or SUCCESS */ }

Contributors

PersonTokensPropCommitsCommitProp
Alex Dai11947.60%17.69%
Anusha Srivatsa4016.00%215.38%
Dave Gordon3313.20%215.38%
Nick Hoath218.40%17.69%
Peter Antoine218.40%17.69%
Tvrtko A. Ursulin166.40%646.15%
Total250100.00%13100.00%

/** * intel_guc_fini() - clean up all allocated resources * @dev_priv: i915 device private */
void intel_guc_fini(struct drm_i915_private *dev_priv) { struct intel_uc_fw *guc_fw = &dev_priv->guc.fw; mutex_lock(&dev_priv->drm.struct_mutex); guc_interrupts_release(dev_priv); i915_guc_submission_disable(dev_priv); i915_guc_submission_fini(dev_priv); if (guc_fw->obj) i915_gem_object_put(guc_fw->obj); guc_fw->obj = NULL; mutex_unlock(&dev_priv->drm.struct_mutex); guc_fw->fetch_status = INTEL_UC_FIRMWARE_NONE; }

Contributors

PersonTokensPropCommitsCommitProp
Alex Dai4858.54%327.27%
Daniel Stone1012.20%19.09%
Tvrtko A. Ursulin89.76%19.09%
Dave Gordon89.76%436.36%
Anusha Srivatsa78.54%19.09%
Chris Wilson11.22%19.09%
Total82100.00%11100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Alex Dai157455.33%69.23%
Dave Gordon51418.07%1218.46%
Anusha Srivatsa2508.79%57.69%
Tvrtko A. Ursulin1033.62%1218.46%
Arun Siluvery863.02%11.54%
Sagar Arun Kamble692.43%34.62%
Peter Antoine622.18%23.08%
Chris Wilson612.14%710.77%
Nick Hoath501.76%23.08%
Daniel Stone240.84%11.54%
Akash Goel150.53%23.08%
Tim Gore110.39%23.08%
David Weinehall80.28%11.54%
Jani Nikula70.25%34.62%
Michał Winiarski30.11%11.54%
Ville Syrjälä20.07%11.54%
Jérémy Lefaure20.07%11.54%
Michel Thierry20.07%11.54%
Michal Wajdeczko10.04%11.54%
Arkadiusz Hiler10.04%11.54%
Total2845100.00%65100.00%
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