diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_uc.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_uc.c | 347 |
1 files changed, 339 insertions, 8 deletions
diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c index c46bc8594f22..c117424f1f50 100644 --- a/drivers/gpu/drm/i915/intel_uc.c +++ b/drivers/gpu/drm/i915/intel_uc.c @@ -24,17 +24,346 @@ #include "i915_drv.h" #include "intel_uc.h" +#include <linux/firmware.h> + +/* Cleans up uC firmware by releasing the firmware GEM obj. + */ +static void __intel_uc_fw_fini(struct intel_uc_fw *uc_fw) +{ + struct drm_i915_gem_object *obj; + + obj = fetch_and_zero(&uc_fw->obj); + if (obj) + i915_gem_object_put(obj); + + uc_fw->fetch_status = INTEL_UC_FIRMWARE_NONE; +} + +/* Reset GuC providing us with fresh state for both GuC and HuC. + */ +static int __intel_uc_reset_hw(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; +} + +void intel_uc_sanitize_options(struct drm_i915_private *dev_priv) +{ + if (!HAS_GUC(dev_priv)) { + if (i915.enable_guc_loading > 0 || + i915.enable_guc_submission > 0) + DRM_INFO("Ignoring GuC options, no hardware\n"); + + i915.enable_guc_loading = 0; + i915.enable_guc_submission = 0; + return; + } + + /* A negative value means "use platform default" */ + if (i915.enable_guc_loading < 0) + i915.enable_guc_loading = HAS_GUC_UCODE(dev_priv); + + /* Verify firmware version */ + if (i915.enable_guc_loading) { + if (HAS_HUC_UCODE(dev_priv)) + intel_huc_select_fw(&dev_priv->huc); + + if (intel_guc_select_fw(&dev_priv->guc)) + i915.enable_guc_loading = 0; + } + + /* Can't enable guc submission without guc loaded */ + if (!i915.enable_guc_loading) + i915.enable_guc_submission = 0; + + /* A negative value means "use platform default" */ + if (i915.enable_guc_submission < 0) + i915.enable_guc_submission = HAS_GUC_SCHED(dev_priv); +} void intel_uc_init_early(struct drm_i915_private *dev_priv) { - mutex_init(&dev_priv->guc.send_mutex); + struct intel_guc *guc = &dev_priv->guc; + + mutex_init(&guc->send_mutex); + guc->send = intel_guc_send_mmio; +} + +static void fetch_uc_fw(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; + + if (!uc_fw->path) + return; + + uc_fw->fetch_status = INTEL_UC_FIRMWARE_PENDING; + + 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->type) { + 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->type); + err = -ENOEXEC; + goto fail; + } + + if (uc_fw->major_ver_wanted == 0 && uc_fw->minor_ver_wanted == 0) { + DRM_NOTE("Skipping %s firmware version check\n", + intel_uc_fw_type_repr(uc_fw->type)); + } else if (uc_fw->major_ver_found != uc_fw->major_ver_wanted || + uc_fw->minor_ver_found < uc_fw->minor_ver_wanted) { + DRM_NOTE("%s firmware version %d.%d, required %d.%d\n", + intel_uc_fw_type_repr(uc_fw->type), + 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); + + obj = i915_gem_object_create_from_data(dev_priv, fw->data, fw->size); + if (IS_ERR(obj)) { + err = PTR_ERR(obj); + 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); + + release_firmware(fw); /* OK even if fw is NULL */ + uc_fw->fetch_status = INTEL_UC_FIRMWARE_FAIL; +} + +void intel_uc_init_fw(struct drm_i915_private *dev_priv) +{ + fetch_uc_fw(dev_priv, &dev_priv->huc.fw); + fetch_uc_fw(dev_priv, &dev_priv->guc.fw); +} + +void intel_uc_fini_fw(struct drm_i915_private *dev_priv) +{ + __intel_uc_fw_fini(&dev_priv->guc.fw); + __intel_uc_fw_fini(&dev_priv->huc.fw); +} + +int intel_uc_init_hw(struct drm_i915_private *dev_priv) +{ + int ret, attempts; + + if (!i915.enable_guc_loading) + return 0; + + gen9_reset_guc_interrupts(dev_priv); + + /* We need to notify the guc whenever we change the GGTT */ + i915_ggtt_enable_guc(dev_priv); + + if (i915.enable_guc_submission) { + /* + * This is stuff we need to have available at fw load time + * if we are planning to enable submission later + */ + ret = i915_guc_submission_init(dev_priv); + if (ret) + goto err_guc; + } + + /* WaEnableuKernelHeaderValidFix:skl */ + /* WaEnableGuCBootHashCheckNotSet:skl,bxt,kbl */ + if (IS_GEN9(dev_priv)) + attempts = 3; + else + attempts = 1; + + while (attempts--) { + /* + * Always reset the GuC just before (re)loading, so + * that the state and timing are fairly predictable + */ + ret = __intel_uc_reset_hw(dev_priv); + if (ret) + goto err_submission; + + intel_huc_init_hw(&dev_priv->huc); + ret = intel_guc_init_hw(&dev_priv->guc); + if (ret == 0 || ret != -EAGAIN) + break; + + DRM_DEBUG_DRIVER("GuC fw load failed: %d; will reset and " + "retry %d more time(s)\n", ret, attempts); + } + + /* Did we succeded or run out of retries? */ + if (ret) + goto err_submission; + + intel_guc_auth_huc(dev_priv); + if (i915.enable_guc_submission) { + if (i915.guc_log_level >= 0) + gen9_enable_guc_interrupts(dev_priv); + + ret = i915_guc_submission_enable(dev_priv); + if (ret) + goto err_interrupts; + } + + return 0; + + /* + * 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). + */ +err_interrupts: + gen9_disable_guc_interrupts(dev_priv); +err_submission: + if (i915.enable_guc_submission) + i915_guc_submission_fini(dev_priv); +err_guc: + i915_ggtt_disable_guc(dev_priv); + + DRM_ERROR("GuC init failed\n"); + if (i915.enable_guc_loading > 1 || i915.enable_guc_submission > 1) + ret = -EIO; + else + ret = 0; + + if (i915.enable_guc_submission) { + i915.enable_guc_submission = 0; + DRM_NOTE("Falling back from GuC submission to execlist mode\n"); + } + + return ret; +} + +void intel_uc_fini_hw(struct drm_i915_private *dev_priv) +{ + if (!i915.enable_guc_loading) + return; + + if (i915.enable_guc_submission) { + i915_guc_submission_disable(dev_priv); + gen9_disable_guc_interrupts(dev_priv); + i915_guc_submission_fini(dev_priv); + } + i915_ggtt_disable_guc(dev_priv); } /* * Read GuC command/status register (SOFT_SCRATCH_0) * Return true if it contains a response rather than a command */ -static bool intel_guc_recv(struct intel_guc *guc, u32 *status) +static bool guc_recv(struct intel_guc *guc, u32 *status) { struct drm_i915_private *dev_priv = guc_to_i915(guc); @@ -43,7 +372,10 @@ static bool intel_guc_recv(struct intel_guc *guc, u32 *status) return INTEL_GUC_RECV_IS_RESPONSE(val); } -int intel_guc_send(struct intel_guc *guc, const u32 *action, u32 len) +/* + * This function implements the MMIO based host to GuC interface. + */ +int intel_guc_send_mmio(struct intel_guc *guc, const u32 *action, u32 len) { struct drm_i915_private *dev_priv = guc_to_i915(guc); u32 status; @@ -54,7 +386,7 @@ int intel_guc_send(struct intel_guc *guc, const u32 *action, u32 len) return -EINVAL; mutex_lock(&guc->send_mutex); - intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL); + intel_uncore_forcewake_get(dev_priv, FORCEWAKE_BLITTER); dev_priv->guc.action_count += 1; dev_priv->guc.action_cmd = action[0]; @@ -71,9 +403,9 @@ int intel_guc_send(struct intel_guc *guc, const u32 *action, u32 len) * up to that length of time, then switch to a slower sleep-wait loop. * No inte_guc_send command should ever take longer than 10ms. */ - ret = wait_for_us(intel_guc_recv(guc, &status), 10); + ret = wait_for_us(guc_recv(guc, &status), 10); if (ret) - ret = wait_for(intel_guc_recv(guc, &status), 10); + ret = wait_for(guc_recv(guc, &status), 10); if (status != INTEL_GUC_STATUS_SUCCESS) { /* * Either the GuC explicitly returned an error (which @@ -92,7 +424,7 @@ int intel_guc_send(struct intel_guc *guc, const u32 *action, u32 len) } dev_priv->guc.action_status = status; - intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL); + intel_uncore_forcewake_put(dev_priv, FORCEWAKE_BLITTER); mutex_unlock(&guc->send_mutex); return ret; @@ -113,4 +445,3 @@ int intel_guc_sample_forcewake(struct intel_guc *guc) return intel_guc_send(guc, action, ARRAY_SIZE(action)); } - |